JP2010180738A - Micropump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a micropump with a tube unit and a control unit which are attachable/detachable. <P>SOLUTION: The micropump 1 is provided with: the tube unit 2 including an elastic tube 50 and fingers 40-46 radially disposed from the center direction of the circular tube 50; a control unit 3 including a cam 20 of which rotary shaft is substantially coincident with the center of the arc shape of the tube 50, a rotor 70 for transmitting a turning force to the cam 20 and a vibrator mechanism part 160 for adjusting a vibrator 130 at an optional position for the rotor 70; reservoir 11; a control circuit part 60; and a battery 61. The tube unit 2 and the control unit 3 are detachably stacked and mounted and the turning force is applied to the rotor 70 by vibration of the vibrator 130. The cam 20 sequentially presses the fingers 40-46 from an inflow side to an outflow side of liquid and the liquid is transported by repeating compressive closing and opening of the tube 50. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a micropump in which a tube unit and a control unit are mounted in a stacked manner and are detachable from each other.

  There is a peristaltic pump as a device for transporting liquid at low speed. As a peristaltic drive pump, a step motor is used as a drive source, a rotor with a plurality of rollers is rotated, and the rotor rotates along a flexible tube while rolling the plurality of rollers to suck and discharge liquid. There exists a structure which performs (for example, patent document 1).

  The vibrating body is brought into contact with the rotating side surface of the rotor by the biasing force of the spring, the disk-shaped rotor is rotated by the vibration of the vibrating body, and a plurality of balls are driven along the tube so that the tube is closed and the liquid is closed. A pump for transportation is known (see, for example, Patent Document 2).

Japanese Patent No. 3177742 JP 2004-124875 A

  According to the configuration of Patent Document 1, since the tube is closed with a roller for a long time from the manufacture (assembly) of the pump module to the start of use, the restoring force of the tube deteriorates, and the discharge accuracy Has the problem of lowering.

  In general, the diameter of the tube has a large variation, and this variation becomes a variation in the amount of closed tube pressure, resulting in a problem that the discharge accuracy cannot be obtained.

  In addition, a connecting element that connects a motor module including a step motor, an output gear mechanism, a control circuit, and a pump module including a tube and a roller is required, and the structure is complicated. In addition, the motor module and the pump module are simplified. Therefore, it is difficult to reduce the thickness.

  Further, when the step motor is reduced in size, the driving torque is reduced. Therefore, it is necessary to increase the rotational torque of the rotor using a reduction mechanism (reduction gear mechanism) having a large reduction ratio. Therefore, a multi-stage reduction gear mechanism is used, resulting in an increase in size and a problem of increased loss due to deceleration.

  Further, in the pump according to Patent Document 2, the rotational speed of the rotor varies due to the variation of the force that urges the vibrating body to the rotor. Therefore, in order to eliminate the influence of the dimensional variation of the components related to the rotor rotation and to obtain a desired rotation speed, it is desirable to have a structure capable of adjusting the biasing force described above.

  When this pump is attached to a living body and a chemical solution or the like is injected, it is required to use a tube that directly contacts the chemical solution, blood, or body fluid. However, since the pump according to Patent Document 2 is configured to stack each of the constituent elements, it is difficult to replace the tube alone at a medical site or the like.

  Therefore, it is conceivable that the tube replacement replaces the entire pump, and the running cost increases.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  [Application Example 1] A micropump according to this application example includes a tube having a part thereof arranged in an arc shape and having elasticity, a plurality of fingers arranged radially from the center direction of the arc shape of the tube, A tube unit having a tube and a guide frame for holding the plurality of fingers, a cam having a rotation axis substantially coincident with the arc-shaped center of the tube, a rotor for transmitting a rotational force to the cam, and a vibrating body A control unit having a position adjustment unit that can be adjusted to an arbitrary position in a range from a position for biasing the vibrating body to the rotor to a position separating from the rotor, and a control unit that communicates with the tube And a control circuit unit that inputs a drive signal to the vibrating body, and a power source that supplies power to the control circuit unit. The control unit is mounted in a stacked manner and is detachable. When the AC voltage is applied to the vibrating body, the vibrating body vibrates, and a rotational force is repeatedly applied to the rotor. The finger is sequentially pushed from the fluid inflow side to the outflow side, and the tube is repeatedly closed and transported to transport the fluid.

  According to this application example, since the tube and the plurality of fingers are unitized as a tube unit and can be separated from the control unit having the cam, the tube is released from the finger pressing in the state of the tube unit alone. Therefore, it is possible to prevent the discharge accuracy from being lowered due to the deterioration of the restoring force caused by continuing to close the tube.

  Also, repeating the tube capping and opening for a long time may deteriorate the restoring force of the tube, but the tube can be easily replaced as a tube unit.

  In addition, if the finger length is adjusted in combination with each tube unit with respect to the variation in the diameter of the tube, the tube closing amount can be adjusted, and the discharge accuracy can be easily guaranteed.

  The micropump according to this application example has a structure in which a rotor and a cam are rotated using a vibrating body. Although described in detail in the embodiment, the rotor driven by the vibrating body has a large rotational torque, and therefore does not require a reduction gear mechanism as in Patent Document 1. Further, since the connection mechanism between the motor module and the pump module is not required and the structure can be simplified, the tube unit and the control unit can be disassembled and assembled at the medical site.

  In addition, the tube unit is less expensive than the control unit, and the running cost can be reduced if the tube unit is disposable for each liquid (chemical solution) to be used and for each object to be used (for example, for each individual).

  Further, since the biasing force of the vibrating body to the rotor can be arbitrarily adjusted by the position adjusting unit, the rotor (including the cam) can be rotated at a desired rotation speed.

  Furthermore, if the vibrating body is adjusted to a position that is separated from the rotor, the assembly can be improved because the rotor and the vibrating body mechanism do not interfere with each other. There is an effect that destruction due to interference with the body mechanism portion can be prevented.

  Furthermore, the vibrating body vibrates by applying an AC voltage to the piezoelectric element, and rotates the rotor, so that no electromagnetic noise is generated and the surrounding devices are not adversely affected. In addition, it is not affected by electromagnetic noise generated by surrounding equipment. Therefore, it is possible to avoid the risk of electromagnetic noise, particularly in the medical field.

  Application Example 2 In the micropump according to the application example, it is preferable that the control circuit unit and the power source are disposed in the control unit.

  According to such a configuration, the control unit includes most of the drive of the vibrating body mechanism unit as a drive source, the rotor, the cam, the control circuit unit, and the power source. You can check the drive.

  In addition, when the battery is provided outside the micropump, a long lead and a battery case for connection between the battery and the control circuit unit are required. However, according to this application example, they are not necessary. is there.

  Application Example 3 In the micropump according to the application example described above, it is preferable that the cam, the rotor, and the vibrating body mechanism unit are disposed inside a recess formed in the guide frame.

  In this way, since the cam, rotor, and vibrating body mechanism are housed in the recess of the guide frame that constitutes the tube unit, a thin micro pump can be realized even when the tube unit and the control unit are stacked. can do.

  Application Example 4 In the micropump according to the application example described above, it is preferable that the rotor has a disk shape and the protruding portion of the vibrating body is disposed so as to contact the outer peripheral side surface of the rotor.

  In this application example, the rotor is rotated by abutting the protrusion of the vibrating body on the outer peripheral surface of the rotor. Although details will be described in the embodiment, according to such a configuration, the vibration of the vibrating body can be converted into rotation with high efficiency, and the same vibrating body is vibrated under the same conditions by contacting the rotor with a large diameter. Sometimes the rotational torque of the rotor can be increased, so that stable driving can be continued.

  Application Example 5 In the micropump according to the application example described above, the rotor has a ring shape, and the protrusion of the vibrating body is disposed so as to contact the ring-shaped inner peripheral side surface of the rotor. preferable.

  In this way, since the vibrating body is disposed inside the outer diameter of the rotor, the micropump can be reduced in size.

  Application Example 6 In the micropump according to the application example described above, the rotor is formed inside a ring-shaped recess formed in one plane of the cam, and the protrusion of the vibrating body is formed of the recess. It is desirable to be disposed so as to contact the inner peripheral side surface.

  With such a configuration, the rotor and the cam can be integrally formed. Therefore, the structure can be simplified and the thickness can be reduced.

  Application Example 7 In the micropump according to the application example described above, the cam is substantially perpendicular to a rotation plane of the cam, and has an outer peripheral side surface having unevenness for closing or releasing the plurality of fingers. When the tube unit is mounted on the control unit, the finger guide surface comprising a slope or a curved surface continuous from the rotation plane in the direction in which the tube unit of the cam is mounted to the outer peripheral side surface. It is preferable that the cam contact portion formed on the finger is moved along the finger guide surface to a position where the cam contact portion contacts the outer peripheral side surface.

  When the tube is a single tube unit, the position in the advancing / retreating direction is not fixed, and when the tube unit is attached to the control unit, the cam contact portion may intersect the cam. Therefore, by providing the finger guide surface on the cam, when the tube unit is mounted on the control unit, the cam contact portion of the finger slides along the finger guide surface and moves until it reaches the outer peripheral side surface of the cam. Therefore, the finger can be accommodated in a position where the tube can be pressed by the cam without any special operation. Further, when the tube unit is mounted on the control unit, it can be prevented that the cam or the finger is broken due to interference.

  Application Example 8 In the micropump according to the application example, when the tube unit is attached to the control unit, the guide portion that substantially matches the arc-shaped center of the tube and the rotation center of the cam is provided on the tube. It is preferable that it is provided between the unit and the control unit.

  The micropump of this application example is configured to press-close a tube by pushing a plurality of fingers by rotation of a cam. Therefore, it is necessary to make the arc center of the arc shape of the tube coincide with the rotation center of the cam.

  Therefore, by providing a guide portion between the tube unit and the control unit, if the tube unit is mounted on the control unit, the center of the arc shape of the tube and the rotation center of the cam can be made to coincide with each other. All of the fingers can reliably close the tube.

  Application Example 9 In the micropump according to the application example described above, when the tube unit is mounted on the control unit, the guide unit is connected to the finger guide surface when the cam contact unit is in contact with the finger guide surface. It is desirable to regulate the position of the control unit in the plane direction.

  When the finger is a single tube unit, the position in the advancing / retreating direction is not fixed, and when the tube unit is attached to the control unit, the cam contact portion intersects (contacts) the finger guide surface. When the cam contact portion intersects the finger guide surface, the position of the tube unit in the plane direction is not fixed with respect to the control unit, and it is predicted that it is difficult to assemble by interfering with each other.

  Therefore, when the cam contact portion is in contact with the finger guide surface, the position of the tube unit and the control unit in the planar direction is restricted by the guide portion, so that the assemblability can be improved.

  Application Example 10 In the micropump according to the application example described above, the control unit includes a cam holder frame that pivotally supports the cam, and the cam or the cam holder frame is inclined in the thickness direction of the cam. It is desirable that a protrusion to be suppressed is provided.

  According to such a configuration, by providing the cam or the cam holder frame with the protrusion that suppresses the inclination of the cam in the thickness direction, when the tube unit is mounted on the control unit, the cam abutting portion is finger-guided. It is possible to prevent the cam from tilting on the surface and inhibiting the movement of the finger to an appropriate position.

  Further, even when the micropump is driven, it is possible to suppress the tube pressing state of the fingers from being varied due to the cams rotating and rotating in the thickness direction.

  Application Example 11 In the micropump according to the application example described above, the vibrating body mechanism unit includes a vibrating body support member that holds the vibrating body, and an engaging portion that engages the vibrating body support member with a tip end portion. A vibrating body urging member having a beam-shaped spring portion and a substantially horseshoe-shaped adjusting portion continuous to a base portion of the spring portion; a rotating shaft portion; and the adjusting portion decentered with respect to a rotation center of the rotating shaft portion; A position adjusting portion including an adjusting shaft having an adjusting shaft portion to be fitted, and the vibrating body biasing member is disposed between the spring portion and the adjusting shaft by the rotation of the adjusting shaft. It is preferable that the position of the vibrating body is adjusted with respect to the position of the rotor as the vibrating body urging member is swung.

  Here, the position adjustment of the vibrating body includes appropriate adjustment of the urging force for urging the vibrating body to the rotor and adjusting the vibrating body to a position away from the rotor. Therefore, with the configuration as in this application example, the position of the vibrator can be adjusted with a simple structure.

  Further, since the adjustment shaft has an eccentric shaft structure having a rotation shaft portion and an adjustment shaft portion eccentric with respect to the rotation center of the rotation shaft portion, the adjustment amount can be increased or decreased by increasing or decreasing the eccentric amount. Fine adjustment can be easily performed by the amount of rotation.

  Application Example 12 In the micropump according to the application example described above, the vibrating body mechanism unit includes a vibrating body support member that holds the vibrating body, and an engaging portion that engages the vibrating body support member with a distal end portion. A vibrating body biasing member having a plurality of protruding portions formed along the outer periphery of a beam-shaped spring portion and a substantially circular fixed portion continuous to the base portion of the spring portion, and the protruding portion of the vibrating body on the outer peripheral portion And a position adjustment portion comprising an adjustment wheel having a protrusion that engages with the portion, and the vibrating member biasing member swings about a fixed shaft that pivotally supports the fixed portion by rotation of the adjustment wheel. It is desirable that the position of the vibrating body is adjusted with respect to the position of the rotor as the vibrating body biasing member is moved.

  Here, for example, a gear that meshes with each other can be adopted as the protrusion provided on the vibrating body urging member and the protrusion provided on the adjustment wheel.

  Even with such a configuration, the position of the vibrator can be adjusted with a simple structure. Further, by changing the gear ratio of the gear of the vibrating body urging member and the gear of the adjustment wheel, the position adjustment amount of the vibrating body can be easily increased or decreased.

  Application Example 13 In the micropump according to the application example described above, it is preferable that a marker indicating a rotation amount is provided along the rotation locus of the adjustment shaft or the adjustment vehicle.

  By providing the marker, it can be used as a guide for the amount of rotation of the adjusting shaft or the adjusting wheel. In particular, since the rotor urging amount of the vibrating body cannot be directly confirmed in the assembled state, the rotation amount of the adjusting shaft or the adjusting wheel can be determined as the urging amount by the marker and can be set appropriately.

  Application Example 14 In the micropump according to the application example described above, the vibrating body mechanism section includes a vibrating body support section that supports the vibrating body, a beam-shaped spring section that is continuous with the vibrating body support section, and the spring section. A vibrating body urging member provided with a positioning shaft provided at a distal end, and a position adjusting unit including a switching member having a plurality of concave portions engaged with the positioning shaft, wherein the concave portion moves the vibrating body to the rotor. It is preferable to be disposed so as to be restricted to a position separated from the position and a position to urge the rotor.

  With this configuration, at least the vibrating body can be easily switched between the two states of urging the rotor with an appropriate urging force and the state of separating the oscillating member with a suitable urging force. If three or more recesses are provided, the setting of the urging force can be switched to a plurality of stages.

  Application Example 15 In the micropump according to the application example described above, it is preferable that a through-hole that looks into the position adjusting unit of the vibrating body mechanism unit from the outside is provided.

  In this way, by providing a through-hole that looks into the adjustment shaft, adjustment wheel, or position adjustment portion such as a plurality of recesses from the outside, position adjustment or position adjustment of the vibrating body relative to the rotor can be performed in the control unit state or the micropump state. Confirmation can be made.

  In addition, when adding a marker, if it is set as the through-hole which can be peeped including a marker, position adjustment with respect to the rotor of a vibrating body and confirmation of a position can be performed more correctly.

  Application Example 16 In the micropump according to the application example, it is preferable that a sealing member for sealing the through hole is provided.

In this way, if the through-hole that looks into the position adjusting unit from the outside is sealed with the sealing member, the inside of the micropump can be sealed, and the dustproof and waterproof properties can be improved and attached to the living body or the surface of the living body. It is suitable as a chemical transport device.
In addition, when dustproof property and waterproofness are not required, the sealing member may not be provided.

  Application Example 17 In the micropump according to the application example, the vibrating body mechanism unit, the rotor, the control circuit unit, and the power source are distributed and arranged on substantially the same plane of the control unit. It is preferable.

  According to such a configuration, since the components related to the micropump drive are distributed and arranged on substantially the same plane, there is an effect that further reduction in thickness can be realized. Furthermore, since these components can be assembled from one direction, the assemblability can be improved.

  Application Example 18 The micropump according to the application example described above preferably includes a connection member that allows the tube and the reservoir to be attached and detached, and the connection member includes an air vent filter.

  It is conceivable that the chemical solution in the reservoir is insufficient when using the micropump. Therefore, if the reservoir is made detachable from the tube, the micropump can be used for a long time by replacing the reservoir with a chemical solution.

  Further, air may be dissolved in the liquid stored in the reservoir, and it is conceivable that the dissolved air gathers over time to form bubbles. When a fluid is a chemical solution and is injected into a living body, if it is injected including bubbles, an influence that cannot be overlooked may occur.

  Therefore, by providing an air vent filter that allows liquid to pass through the communication part between the reservoir and the tube and blocks the passage of bubbles, it is possible to suppress the intrusion of bubbles into the living body, thereby improving safety. it can.

Application Example 19 In the micropump according to the application example, it is preferable that the reservoir includes a port for injecting or sealing a fluid into the reservoir.
Here, for example, a septum or the like can be adopted as the port.

  By providing a septum in the reservoir, additional fluid can be injected into the reservoir while the reservoir is connected to the tube, that is, when the micropump is in use.

  Application Example 20 In the micropump according to the application example described above, it is preferable that a speed reduction mechanism or a speed increase mechanism is provided between the rotor and the cam.

  Thus, by providing the speed reduction mechanism or speed increasing mechanism, it is possible to change the rotational speed of the cam while keeping the rotational speed of the rotor constant. That is, the amount of fluid flow per unit time can be adjusted as appropriate.

  Further, in the structure in which the speed reduction mechanism is provided, the rotational torque of the cam can be increased, and the cam can be driven stably even if the load accompanying the tube pressing increases.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the drawings referred to in the following description are schematic views in which the vertical and horizontal scales of members or portions are different from actual ones for convenience of illustration.
(Embodiment 1)

First, the overall configuration of the micropump of the present invention will be described.
1A and 1B show a micropump according to a first embodiment, where FIG. 1A is a plan view and FIG. 1B is a front view. In FIG. 1, the micropump 1 includes a drive unit 10 and a reservoir 11 that stores liquid.

  The drive unit 10 is configured by stacking and mounting the tube unit 2 and the control unit 3. The tube unit 2 includes a first tube guide frame 17 and a second tube guide frame 16 as guide frames for holding a tube 50 and a plurality of fingers (not shown). The control unit 3 includes a first machine casing 14 and a second machine casing 15 as machine frames for holding a cam, a rotor, a vibrating body mechanism unit, a control circuit unit, and a power source (both not shown). Yes.

  The tube unit 2 and the control unit 3 are stacked and mounted in the thickness direction to form the drive unit 10, but are detachable. In addition, as shown to Fig.1 (a), attachment with the tube unit 2 and the control unit 3 has illustrated the structure fixed with the three fixing screws 91 in this embodiment. A sealed space is formed inside the tube unit 2 and the control unit 3 in a state in which the peripheral edge portion is tightly fixed by the fixing screw 91, and the space is waterproof.

  The reservoir 11 is placed in a recess provided on the upper surface side of the first machine casing 14, and is connected to the drive unit 10 by a tube 50. The reservoir 11 is made of a flexible material, and is deformed by the external atmospheric pressure when the internal liquid flows out, so that the internal pressure of the reservoir 11 is kept constant.

  In addition, the reservoir 11 is communicated with an inlet 52 of the tube 50. The liquid stored in the reservoir 11 is discharged from the outlet part 53 by repeatedly closing and releasing the tube 50 by the peristaltic motion of the driving part 10.

  As shown in FIG. 1A, the reservoir 11 is provided with a septum 145 as a port so that liquid can be injected or sealed inside the reservoir 11.

Next, the configuration of the drive unit 10 will be described with reference to the drawings.
FIG. 2 is a plan view showing the configuration of the drive unit, and FIG. 3 is a cross-sectional view showing the A-P-B cut plane of FIG. In FIG. 2, the second tube guide frame 16 is not shown.

  2 and 3, the tube unit 2 includes a tube 50 that is partly arranged in an arc shape and has elasticity, and fingers 40 to 46 that are arranged radially at equal intervals from the center of the arc shape of the tube 50. The first tube guide frame 17 and the second tube guide frame 16 as a guide frame for holding the tube 50 and the fingers 40 to 46 are configured. Hereinafter, the fluid will be described as a liquid such as a chemical solution.

The control unit 3 includes a cam 20, a disk-shaped rotor 70 that is coaxially fixed with the cam 20 (cam shaft 75), a vibrating body mechanism portion 160 that applies a rotational force to the rotor 70, and a vibrating body mechanism portion 160. A control circuit unit 60 that inputs a drive signal to perform drive control and a battery 61 as a power source that supplies power to the control circuit unit 60 are configured.
Note that the arc-shaped center of the tube 50 and the rotation center P of the cam 20 coincide with each other.

  The cam 20 and the rotor 70 are fixed to the cam shaft 75 and are configured to rotate integrally with the rotation center P as the same rotation shaft.

  The vibrating body mechanism section 160 includes a vibrating body 130, a vibrating body support member 161 that holds the vibrating body 130, and a vibrating body biasing member 166 that engages with the vibrating body support member 161 and biases the vibrating body 130 toward the rotor 70. It consists of and. Further, the protrusion 133 a of the vibrating body 130 is biased to the outer peripheral side surface of the rotor 70 by the vibrating body biasing member 166.

  The detailed configurations of the vibrating body mechanism unit 160 and the vibrating body 130 will be described later with reference to FIGS.

  Here, as shown in FIG. 2, the tube 50, the cam 20 (including the rotor 70), the fingers 40 to 46, and the vibrating body mechanism unit 160 are in a state where the tube unit 2 and the control unit 3 are mounted. Dispersed and arranged at positions that do not overlap each other in a plane.

  The cam 20 has irregularities on the outer peripheral side surface, and finger pressing surfaces 21a to 21d are formed on the outermost peripheral portion. The finger pressing surfaces 21a to 21d are formed on concentric circles equidistant from the rotation center P.

  Moreover, the circumferential pitch and outer shape of the finger pressing surface 21a and the finger pressing surface 21b, the finger pressing surface 21b and the finger pressing surface 21c, the finger pressing surface 21c and the finger pressing surface 21d, and the finger pressing surface 21d and the finger pressing surface 21a Are equally formed.

Each of the finger pressing surfaces 21a to 21d is formed with a finger pressing slope 22 and a concentric circular arc portion 23 centering on the rotation center P. The arc portion 23 is provided at a position where the fingers 40 to 46 are not pressed.
In addition, one end of each of the finger pressing surfaces 21a, 21b, 21c, and 21d and the arc portion 23 are connected by a linear portion 24 that extends from the rotation center P.

  The tube 50 is inserted into a tube guide groove 17 b formed in the first tube guide frame 17, and one end portion is an outlet portion 53 that discharges the liquid to the outside and protrudes outside the micropump 1. ing. The other end portion is an inflow port portion 52 into which liquid flows in, is connected to the reservoir 11, and the liquid flow portion 51 is communicated with the reservoir 11.

  The tube 50 is mounted in a tube guide groove 17b formed so that the range pressed by the fingers 40 to 46 is concentric with the rotation center P. Since the fingers 40 to 46 are formed in the same shape, the finger 44 will be described as an example. The finger 44 includes a columnar shaft portion 44a, a bowl-shaped tube pressing portion 44c provided at one end portion of the shaft portion 44a, a cam contact portion 44b whose other end portion is rounded into a hemisphere, It is composed of

  The fingers 40 to 46 can move forward and backward along the finger guide groove 17 a and are pushed toward the tube 50 by the cam 20 to press the tube 50 and press-close the liquid flow part 51. Note that the center position of the fingers 40 to 46 in the cross-sectional direction substantially coincides with the center of the tube 50 in the cross-sectional direction.

Next, a cross-sectional configuration of the drive unit 10 will be described with reference to FIG.
In the control unit 3, the cam 20, the rotor 70, and the vibrating body mechanism unit 160 are disposed on the upper surface side of the second machine casing 15, and the control circuit unit 60 and the battery 61 are illustrated on the lower surface side of the second machine casing 15. It is arranged and constituted.

  The cam 20 and the rotor 70 are axially fixed to the cam shaft 75. Therefore, the cam 20 and the rotor 70 can rotate integrally with the rotation center P as a common rotation axis. The cam shaft 75 has shaft portions at both ends, and is supported by a bearing 93 provided on the second machine casing 15 and a bearing 92 provided on the cam holding machine casing 18.

  The cam holding machine frame 18 is formed by two cam holding machine frame guide shafts 106 planted on the second machine frame 15 at the peripheral edge of the position where the cam 20 (rotor 70) and the vibrating body mechanism unit 160 are arranged. The position is regulated and the fixing screw 107 fixes the second machine casing 15 (see also FIG. 2).

  As shown in FIG. 2, the adjustment shaft 125 of the vibrating body mechanism unit 160 is disposed at a position that does not intersect the cam holder frame 18.

  The battery 61, the control circuit unit 60, and the circuit board 63 are disposed on the back side of the second machine casing 15. The circuit board 63 extends from the battery 61 to the range in which the control circuit unit 60 is disposed, and a connection pattern (not shown) is formed on the surface thereof.

  The control circuit unit 60 includes a power supply circuit, an oscillation circuit, and the like (both not shown). The power supply circuit is connected to the electrode of the battery 61, and the oscillation circuit is connected to the plurality of electrodes of the vibrating body 130.

  The surface of the battery 61 in contact with the circuit board 63 is a negative electrode, the side surface is a positive electrode, and the negative electrode is directly connected to the connection pattern. Further, the positive electrode is connected to a corresponding connection pattern via a battery terminal 62 (see also FIG. 2), and supplies power to the control circuit unit 60.

  On the back side of the second machine casing 15, the first machine casing 14 is disposed so as to cover the control circuit unit 60 and the battery 61. The first machine casing 14 and the second machine casing 15 are firmly fixed at their contact surfaces.

  The battery 61 is held in the recess formed in the first machine casing 14 in the plane direction and held by the battery lid 19. A screw portion 19 b is formed on the outer peripheral projection of the battery lid 19, and is screwed to a female screw formed on the first machine casing 14.

  The battery lid 19 has an opening / closing groove 19a. The battery lid 19 can be opened / closed by inserting a screwdriver or a coin into the opening / closing groove 19a and rotating it. That is, the battery cover 19 is removed, the battery 61 is taken out, the battery 61 is attached, and the battery cover 19 is tightened to press the battery 61 against the circuit board 63. At this time, the battery lid 19 and the first machine casing 14 are in close contact with each other.

  In addition to the screwing structure, the battery lid 19 can be selected from a bayonet structure, a press-fit structure, a fixed screw structure, and the like.

  The cam 20, the rotor 70, the vibrating body mechanism portion 160, and the cam holding machine frame 18 are inside a recess 30 (which may be referred to as a space 30) constituted by the first tube guide frame 17 and the second tube guide frame 16. It is arranged. That is, the cam 20, the rotor 70, the vibrating body mechanism portion 160, and the cam holding machine frame 18 are accommodated in the recess of the tube unit. The space 30 is sealed by the second machine casing 15.

Next, the holding structure of the fingers 40 to 46 will be described.
FIG. 4 is a partial cross-sectional view showing the finger holding structure, and is a partial cross-sectional view when the shaft portion 44a is cut vertically. The finger 44 will be described as an example. In FIG. 4, a substantially U-shaped finger guide groove 17 a and a tube guide groove 17 b are formed in the first tube guide frame 17.

  By sealing the open side of the finger guide groove 17a with the second tube guide frame 16, a finger guide hole is formed.

  The finger 44 and the tube 50 are inserted into the finger guide groove 17a and the tube guide groove 17b, respectively, and then the open side of each groove is covered with the second tube guide frame 16, and the first tube guide frame 17 and the second tube guide are covered. The mutual contact surfaces with the frame 16 are tightly fixed.

  In addition, as shown in FIG. 3, the tube control wall 17c is provided in the outer side direction of the tube guide groove 17b, and the movement of the tube 50 is controlled at the time of tube pressure closing by the fingers 40-46.

  A sheet-like elastic member 66 is provided between the tube regulating wall 17 c and the tube 50. The elastic member 66 is provided as a damper when the tube 50 is closed by the fingers 40 to 46 so that the tube 50 does not deteriorate due to overload. Further, the elastic member 66 has an elastic force necessary for tube closing. It is more preferable that the elastic member 66 has a small friction coefficient with the tube 50.

  When the tube unit 2 is a single unit, the fingers 40 to 46 can move forward and backward along the finger guide holes and are in a position where the tube 50 is not closed by the elastic force of the tube 50.

Subsequently, a mounting structure and method of the tube unit 2 to the control unit 3 will be described with reference to the drawings.
FIG. 5 is a partial cross-sectional view schematically showing the mounting structure of the tube unit to the control unit. In FIG. 5, a tube unit guide shaft 121 is planted in the first machine casing 14. The tube unit guide shaft 121 is a stepped shaft, and a guide shaft portion 121b and a guide portion 121a in which the tip end portion of the guide shaft portion 121b is rounded into a hemisphere are formed.

  It is desirable that two or three tube unit guide shafts 121 are provided apart from each other at the peripheral edge of the first machine casing 14.

  The guide shaft portion 121b protrudes through the second machine casing 15. The first tube guide frame 17 and the second tube guide frame 16 are provided with a guide hole 126 in common. Note that the guide hole 126 does not penetrate the second tube guide frame 16.

  Further, the cam 20 has a rotation plane 27, an outer peripheral side surface that is perpendicular to the rotation plane 27 and has projections and depressions for closing or releasing the fingers 40 to 46 (finger 44), and a rotation plane. A finger guide surface 28 having a slope or a curved surface that is continuous from 27 to the outer peripheral surface (finger pressing surfaces 21a to 21d are shown) is formed.

  Here, when the tube unit 2 is attached to the control unit 3, the cam contact portion 44 b formed on the finger 44 first contacts the finger guide surface 28 (represented by the cam contact portion 44 b ′). At this time, the guide shaft 121b of the tube unit guide shaft 121 is dimensioned so as to protrude at least from the lower surface 16a (represented by the lower surface 16a ') of the second tube guide frame 16.

  When the tube unit 2 is further moved toward the control unit 3, the cam contact portion 44b slides on the finger guide surface 28 and the cam contact portion 44b contacts the finger pressing surfaces 21a to 21d. Move to position. At this time, the position of the tube unit 2 in the planar direction is regulated by the tube unit guide shaft 121.

  Both the tube unit guide shaft 121 and the guide hole 126 are guide portions for aligning the arc-shaped center of the tube 50 with the rotation center P of the cam 20.

  The finger guide surface 28 may be formed with a straight slope or a curved surface with an upward convex shape, and the connecting portion between the finger guide surface 28 and the outer peripheral surface may be smoothly finished. More preferred.

  Further, as shown in FIG. 3, the cam holding machine frame 18 is formed with a protrusion 18a for suppressing the cam 20 from being inclined in the thickness direction. In the present embodiment, the protrusion 18 a is formed of a ring having a hemispherical cross section, but may be a dot-like protrusion, and is provided at a position close to the outer periphery within the range of the rotation plane 27 of the cam 20.

  In addition, when the protrusion part 18a is a dot-like protrusion, it is provided on the opposite side to the fingers 40 to 46 with respect to the cam shaft 75 at least. In addition, the inclination suppressing protrusion may be provided on the rotation plane 27 of the cam 20.

Next, the vibrating body mechanism unit will be described with reference to the drawings.
6 is a plan view showing the configuration of the vibrating body mechanism according to the present embodiment, FIG. 7 is a cross-sectional view showing the BB cut surface of FIG. 6, and FIG. 8 is a cross section showing the DD cut surface of FIG. FIG. 9 and FIG. 9 are partial cross-sectional views showing the EE cut surface of FIG. 6 and 7, the vibrating body mechanism section 160 includes a vibrating body 130, a vibrating body support member 161, a vibrating body biasing member 166, and an adjustment shaft 215. The vibrating body 130 is fixed to the vibrating body support member 161 by screwing the arm portions 133b at both ends of the reinforcing plate with fixing screws 211.

  A washer 212 is provided between the fixing screw 211 and the reinforcing plate 133. Since the reinforcing plate 133 is a thin plate having a thickness of about 0.1 mm, it is provided so as not to deform the reinforcing plate when the fixing screw 211 is fastened.

  The vibrating body support member 161 is fixed to the fixed shaft 138 in a state where the vibrating body 130 is fixedly supported. The fixed shaft 138 is planted in the first machine casing 14, and a guide shaft portion 138a is formed. The vibrating body support member 161 is fixed by a fixing screw 213 so that the hole formed is inserted into the guide shaft portion 138a and is rotatable about the guide shaft portion 138a.

  The vibrating body support member 161 is suppressed from being lifted by the flange portion of the fixing screw 213 and the cam holder frame 18. The vibrating body support member 161 has a long hole-shaped vibrating body biasing member insertion hole 162 having a straight portion.

  Next, the vibrating body urging member 166 will be described. 6 and 8, the vibrating body urging member 166 includes a beam-shaped spring portion 167 having an engaging portion 169 whose tip portion engages with the vibrating body support member 161, and a substantially continuous portion of the base portion of the spring portion 167. And a horseshoe-shaped adjusting portion 168.

  An adjustment shaft 215 is planted on the second machine casing 15. The adjustment shaft 215 includes a rotation shaft portion 215d that is rotatably set on the second machine casing 15, and an adjustment shaft in which the rotation center P4 is eccentric by an eccentric amount h with respect to the rotation center P3 of the rotation shaft portion 215d. A portion 215c and a flange portion 215a are formed. An adjustment groove 215b into which a screwdriver or the like can be inserted is formed on the upper portion of the flange portion 215a.

  The vibrating body urging member 166 has an engaging portion 169 inserted into the vibrating body urging member insertion hole 162 of the vibrating body support member 161, and is rotated around a guide shaft 214 disposed between the spring portion 167 and the adjustment shaft 215. Fits movably. At this time, the adjustment portion 168 of the vibrating body biasing member 166 and the adjustment shaft portion 215c of the adjustment shaft 215 are engaged.

  The adjustment portion 168 and the adjustment shaft portion 215c are set so that the gap is minimized within a range in which the adjustment shaft 215 can rotate. In addition, the rotation shaft portion 215d is set to have a dimension that provides a rotational torque that can rotate with respect to the second machine casing 15.

  A through hole 250 is formed in the upper portion of the adjustment shaft 215 of the second tube guide frame 16 (see FIG. 8). The through hole 250 has a size that allows the first tube guide frame 17 to pass through the adjustment shaft 215 so that the adjustment shaft 215 can be rotated from the outside.

  It is more preferable to provide a sealing member 251 (represented by a two-dot chain line) that seals the through hole 250. The sealing member 251 has a structure that can be attached to and detached from the second tube guide frame 16.

  Further, as shown in FIG. 9, the shape of the engaging portion 169 provided at the distal end portion of the spring portion 167 is substantially circular in the width direction of the vibrating body biasing member insertion hole 162. Then, the widths of the engaging portion 169 and the vibrating body urging member insertion hole 162 are set so as to have a minimum clearance within the insertable range.

  As shown in FIGS. 6 and 8, the second machine casing 15 is provided with markers 216 a to 216 g along the rotation locus of the adjustment shaft 215.

  Next, a method for adjusting the position of the vibrating body 130 with respect to the rotor 70 will be described with reference to FIG. In the illustrated state, the adjustment groove 215b of the adjustment shaft 215 is at a position where the marker 216d is pointed, and the vibrating body 130 is at a position where the protrusion 133a is in contact with the rotor 70.

  When the adjustment shaft 215 is rotated by one rotation, the adjustment shaft portion 215c draws a rotation locus K as shown in FIG. Here, when the adjustment shaft 215 is rotated clockwise to a position where the adjustment groove 215b indicates the marker 216a, the vibrating body biasing member 166 swings clockwise around the guide shaft 214 about the rotation center (rotation center P2). Then, the engaging portion 169 of the spring tip moves to the illustrated engaging portion 169 ″ position.

  As the vibrating body urging member 166 swings, the vibrating body support member 161 swings clockwise around the guide shaft portion 138a about the rotation center (rotation center P1). Then, the protrusion 133a of the vibrating body 130 is separated from the rotor 70 by a distance D2 (represented by the protrusion 133a ″).

  On the other hand, when the adjustment shaft 215 is rotated counterclockwise to a position where the adjustment groove 215b indicates the marker 216g, the vibrating body biasing member 166 swings the guide shaft 214 counterclockwise around the rotation center (rotation center P2). Then, the engaging portion 169 of the spring tip moves to the illustrated engaging portion 169 ′ position.

  As a result, the vibrating body support member 161 swings the guide shaft portion 138a counterclockwise around the rotation center (rotation center P1). Then, the protrusion 133a of the vibrating body 130 moves to a position where it intersects the rotor 70 by the amount of intersection D1 (represented by the protrusion 133a '). However, since the protrusion 133a contacts the rotor 70, the intersection amount D1 becomes the rotor biasing amount of the vibrating body 130. The elastic force of the spring portion 167 corresponding to the rotor biasing amount is biased to the rotor 70.

  The illustrated distance D2 and the amount of intersection D1 indicate the maximum amount of movement of the vibrating body 130. Therefore, the adjustment shaft 215 is rotated to an arbitrary position between the distance D2 and the crossing amount D1, and is rotated within the range of the markers 216a to 216g so as to have a desired separation distance or crossing amount. The position of the protrusion 133a) with respect to the rotor 70 can be adjusted.

  Subsequently, liquid transport of the micropump 1 according to the present embodiment will be described. First, the configuration and operation of the vibrating body 130 will be described with reference to FIGS.

  FIG. 10 is a perspective view showing the configuration of the vibrating body. As shown in FIG. 10, the vibrating body 130 has a substantially rectangular thin plate shape. In the vibrating body 130, a plate-like piezoelectric element 134 is in close contact with the surface of the reinforcing plate 133, and electrodes 131 a, 131 b, and 131 c are in close contact with the surface of the piezoelectric element 134.

  A plate-like piezoelectric element 135 is in close contact with the back surface of the reinforcing plate 133, and an electrode 132 is in close contact with the surface of the piezoelectric element 135. The electrode 131a is formed at the center in the width direction of the piezoelectric element 134 over the entire length direction, and the electrodes 131b and 131c are disposed diagonally across the electrode 131a.

  In addition, although illustration is abbreviate | omitted, the electrode 132 is formed so that it may become plane symmetrical with respect to electrode 131a, 131b, 131c on both sides of the reinforcement board 133.

  The material of the piezoelectric elements 134 and 135 is not particularly limited, and lead zirconate titanate (PZT), crystal, lithium niobate, barium titanate, lead titanate, lead metaniobate, polyvinylidene fluoride, lead zinc niobate , Lead scandium niobate and the like can be used.

  The reinforcing plate 133 has a function as a common electrode for the piezoelectric elements 134 and 135 and a function to reinforce the entire vibrating body 130, and prevents the vibrating body 130 from being damaged by an excessive amplitude or an external force. Although it does not specifically limit as a material of the reinforcement board 133, For example, it is desirable that they are metal materials, such as stainless steel, aluminum or an aluminum alloy, titanium or a titanium alloy, copper or a copper-type alloy.

  The piezoelectric elements 134 and 135 are preferably thicker than the reinforcing plate 133. Thereby, the vibrating body 130 can be vibrated with higher efficiency.

  The piezoelectric elements 134 and 135 repeatedly expand and contract in the longitudinal direction when an AC voltage is applied, and accordingly, the reinforcing plate 133 repeatedly expands and contracts in the longitudinal direction.

A protrusion 133 a is integrally formed at the longitudinal end of the reinforcing plate 133. As shown in FIGS. 2 and 3, the vibrating body 130 is disposed so that the protrusion 133 a contacts the outer peripheral side surface (contact surface 72) of the rotor 70.
In addition, the protrusion part 133a is provided in the position (corner part in the illustration) shifted from the center part (center line G: see FIG. 11) of the reinforcing plate 133.

  In addition, a pair of arm portions 133b are provided on both sides of the center of the reinforcing plate 133 in the length direction, and a fixed portion 133c is formed at the tip of the arm portion 133b. In the vibrating body 130, the fixing portion 133c is fixed to the vibrating body support member 161 using a fixing screw 211 (see FIG. 7). That is, the vibrating body 130 is supported by the arm portion 133b. Thereby, the vibrating body 130 can vibrate freely, and vibrates with a relatively large amplitude.

Next, the operation of the vibrating body 130 will be described with reference to the drawings.
FIG. 11 is a partial plan view schematically illustrating the action of the vibrating body, and FIG. 12 is an explanatory diagram schematically illustrating the movement of the protrusion. As shown in FIG. 10, when an AC voltage is applied between the electrodes 131a, 131b, and 131c and the reinforcing plate 133, the piezoelectric element 134 in the lower surface area of the electrode 131a expands and contracts in the longitudinal direction as indicated by an arrow X, Perform longitudinal vibration.

  The piezoelectric elements 134 in the lower surface range of the electrodes 131b and 131c also expand and contract in the longitudinal direction, but are arranged in the diagonal direction of the piezoelectric elements 134, so that in-plane bending vibration as indicated by the arrow Y is generated. Do.

  In the piezoelectric element 135 as well, a similar alternating voltage is applied to the electrode 132 (formed symmetrically with the electrodes 131a, 131b, and 131c).

  Accordingly, the vibrating body 130 mainly vibrates longitudinally in the longitudinal direction, but resonates longitudinal vibration and bending vibration, and causes the protrusion 133a to elliptically vibrate. Hereinafter, this point will be described.

  As shown in FIG. 11, when the vibrating body 130 rotationally drives the rotor 70, the protrusion 133 a receives a reaction force f from the rotor 70. In the present embodiment, the protrusion 133 a is provided at a position shifted from the center line G of the vibrating body 130. Therefore, the vibrating body 130 is deformed and vibrated so as to bend in the in-plane direction by the reaction force f. Note that FIG. 11 exaggerates the deformation of the vibrating body 130.

  By appropriately selecting the frequency of the applied voltage, the shape / size of the vibrating body 130, the position of the protrusion 133a, etc., the frequency of the bending vibration and the frequency of the longitudinal vibration resonate, the amplitude increases, and the protrusion As indicated by the arrow r in FIG. 12, 133a is displaced along an ellipse (elliptical vibration).

  As a result, when the protrusion 133a extends and feeds the rotor 70 in the rotational direction with one amplitude of the vibrating body 130, the protrusion 133a is pressed against the rotor 70 with a strong force. Further, when the protrusion 133 a contracts and returns, the frictional force with the rotor 70 can be reduced or eliminated, and therefore the vibration of the vibrating body 130 can be converted with high efficiency by the rotation of the rotor 70.

  In the vibrating body 130, the protrusion 133 a is biased to the contact surface 72 on the outer peripheral side surface of the rotor 70 by the elasticity of the spring portion 167 of the vibrating body biasing member 166.

  Therefore, when the vibrating body 130 is vibrated by applying an AC voltage to the piezoelectric elements 134 and 135 in a state where the protrusion 133a is in contact with the contact surface 72 of the rotor 70, the rotor 70 expands. When receiving, a frictional force (pressing force) is received from the protrusion 133a. By repeatedly applying this pressing force, the rotor 70 rotates in the clockwise direction (arrow R).

  The vibrating body 130 is disposed in a posture substantially parallel to the rotor 70 in the cross-sectional direction and is thinner than the thickness of the rotor 70. Further, the thickness of the vibrating body 130 is more preferably made thinner than the width in the cross-sectional direction of the groove 71 formed on the outer peripheral side surface of the rotor 70.

  The frequency applied to the piezoelectric elements 134 and 135 is not particularly limited, but is preferably approximately the same as the resonance frequency of vibration (longitudinal vibration) of the vibrating body 130. Thereby, the amplitude of the vibrating body 130 is increased, and the rotor 70 can be rotationally driven with high efficiency and high torque.

  Next, the operation related to the liquid transport of the micropump 1 will be described with reference to FIG. The cam 20 is rotated from the vibrating body 130 via the rotor 70 (shown in the direction of arrow R). Then, the finger 44 is pushed by the finger pressing surface 21 d of the cam 20.

  At this time, the finger 45 is in contact with the joint portion between the finger pressing surface 21d and the finger pressing slope 22 and press-closes the tube 50. In addition, the finger 46 presses the tube 50 on the finger pressing slope 22, but the finger 46 is smaller than the pressing amount of the finger 44 and does not completely close the tube 50.

  The fingers 41 to 43 are in the range of the arc portion 23 of the cam 20 and are in an initial position where the tube 50 is not pressed. In addition, the finger 40 is in contact with the finger pressing slope 22 of the cam 20, but the tube 50 is not yet closed at this position.

  From this position, when the cam 20 is further rotated in the direction of arrow R, the fingers 50 and 46 are pushed in this order by the finger pressing surface 21d of the cam 20 to press-close the tube 50. The finger 44 is released from the finger pressing surface 21d, and the tube 50 is opened. The liquid flows into the liquid flow portion 51 at a position where the pressure closure is released from the finger of the tube 50 or a position where the pressure closure is not yet performed.

  When the cam 20 is further rotated by the vibrating body 130, the finger pressing slope 22 is sequentially pushed in the order of the fingers 40, 41, 42, and 43, and when the finger pressing surface 21c is reached, the tube 50 is closed.

  By repeating such an operation, the liquid flows from the inlet portion 52 side toward the outlet portion 53 side and is discharged from the outlet portion 53.

  At this time, two of the plurality of fingers come into contact with the finger pressing surface of the cam 20, and when moving to a position where the next finger is pushed, one of the fingers is pushed. In this manner, by repeating the state in which the tube 50 is pressed with two fingers and the state in which the tube 50 is pressed with one finger, a state in which at least one finger always press-closes the tube 50 is formed.

  The structure of a micropump that transports fluid by repeatedly pressing and releasing the tube by sequentially pushing from the fluid inflow side to the outflow side of the tube with elasticity by such a plurality of fingers is called a peristaltic drive system. .

  The micropump 1 according to this embodiment includes a tube unit 2 and a control unit 3. Each unit can be separated as a single unit. Therefore, when the tube unit 2 is a single unit, the tube 50 is kept released from the pressing of the fingers 40 to 46, and therefore, the discharge accuracy accompanying the deterioration of the restoring force due to continuing the pressure closing of the tube 50 is achieved. A decrease can be prevented.

  Also, when the tube 50 is repeatedly closed and opened for a long time, the restoring force of the tube 50 may deteriorate, but the tube 50 can be easily replaced as the tube unit 2.

  It is known that the tube 50 generally has a large variation in the outer diameter (including the inner diameter). If the outer diameter of the tube 50 varies, the amount of fluid flow per unit time also varies.

  Therefore, since the length of the fingers 40 to 46 can be adjusted in combination with respect to the variation in the diameter of the tube 50 and the tube pressure closing amount can be adjusted for each tube unit, the variation in the discharge accuracy can be suppressed. .

  In addition, when the micropump 1 is attached to a living body and a chemical solution or the like is injected, it is required to replace the tube 50 that directly contacts the chemical solution, blood, or body fluid. However, since the pump according to Patent Document 2 is configured to stack and assemble the constituent elements one by one, it is difficult to replace the tube at a medical site or the like.

  However, if the tube unit 2 and the control unit 3 are configured to be detachable, the tube unit 2 and the control unit 3 can be easily assembled or separated at the medical site. For this reason, the running cost can be reduced if the low-cost tube unit 2 including the tube 50 that is in direct contact with the chemical solution or the like is disposable and the high-cost control unit 3 is repeatedly used.

  The rotor drive according to the present embodiment has a configuration in which the rotor 70 is rotated by the elliptical motion of the protrusion 133 a due to the bending and stretching vibration of the vibrating body 130 and the frictional force between the protrusion 133 a and the rotor 70. Therefore, the magnitude of the urging force of the vibrating body 130 on the rotor 70 (corresponding to the reaction force f) affects the rotational speed, energy transmission efficiency, and output torque of the rotor 70.

  Therefore, in the present embodiment, the adjustment shaft 215 is rotated to swing the vibrating body urging member 166 and the vibrating body support member 161 so that the position of the vibrating body 130 with respect to the rotor 70 can be adjusted.

  Therefore, since the urging force of the vibrating body 130 to the rotor 70 can be adjusted arbitrarily, the rotor 70 can be rotated at a desired rotation speed. In addition, energy transmission efficiency can be increased and an appropriate rotational torque can be set.

  Furthermore, if the vibrating body 130 is adjusted to a position away from the rotor 70, the rotor 70 and the vibrating body mechanism 160 do not interfere with each other when the rotor 70 and the vibrating body mechanism portion 160 are assembled. There is an effect that can be prevented.

  The vibrating body mechanism unit 160 includes a vibrating body support member 161 that holds the vibrating body 130, a vibrating body biasing member 166, and an adjustment shaft 215 as a position adjusting unit. By rotating the adjustment shaft 215, the vibrating body urging member 166 is swung, and the vibrating body support member 161 is swung to adjust the position of the vibrating body 130 with respect to the position of the rotor 70. it can.

  Therefore, the position of the vibrating body 130 relative to the rotor 70 can be adjusted with a simple structure. Further, the range of the adjustment amount can be increased / decreased by increasing / decreasing the amount of eccentricity h between the rotation shaft portion 215d and the adjustment shaft portion 215c, and fine adjustment can be easily performed by the rotation amount of the adjustment shaft 215.

  In addition, markers 216 a to 216 g representing the rotation amount (rotation position) are provided along the rotation locus of the adjustment shaft 215.

  Providing the markers 216a to 216g can be used as a guide for the amount of rotation of the adjustment shaft 215. In particular, since the rotor biasing amount of the vibrating body 130 cannot be directly confirmed in the assembled state, the biasing amount is determined by the rotation amount (rotation position) of the adjustment shaft 215 using the markers 216a to 216g, and an appropriate amount is determined. It can be set.

  Further, the second machine casing 15 is provided with a through hole 250 through which the adjustment shaft 215 as a position adjusting unit is viewed from the outside. Accordingly, the position adjustment and position confirmation of the vibrating body 130 with respect to the rotor 70 can be performed in the state of the control unit 3 or the state of the micro pump 1.

  In addition, when adding the markers 216a to 216g, if the through hole 250 that can be seen including the markers 216a to 216g is used, the position adjustment and position confirmation of the vibrating body 130 with respect to the rotor 70 are performed more accurately. be able to.

  If all or a part of the first machine frame 14, the second machine frame 15, the first tube guide frame 17, and the second tube guide frame 16 is formed of a transparent member, the internal components and their engagement states Can be visually recognized from the outside.

Furthermore, it is more desirable to provide a sealing member 251 that seals the through hole 250. Thus, if the through-hole 250 is sealed with the sealing member 251, the inside (space 30) of the micropump 1 can be hermetically sealed, and the dustproofness and waterproofness can be improved, and is attached to the living body or the living body surface. It is suitable as a chemical transport device.

  Furthermore, since the vibrating body 130 vibrates by applying an AC voltage to the piezoelectric elements 134 and 135 and rotates the rotor 70, no electromagnetic noise is generated, and the surrounding devices are not adversely affected. In addition, it is not affected by electromagnetic noise generated by surrounding equipment. Therefore, it is possible to avoid the risk of electromagnetic noise, particularly in the medical field.

  Further, since the cam 20, the rotor 70, and the vibrating body mechanism portion 160 are accommodated in the concave portion 30 of the tube unit 2, a thin micro pump can be used even when the tube unit 2 and the control unit 3 are stacked. 1 can be realized.

  In addition, the rotor 70 has a disk shape, and the protrusion 133 a of the vibrating body 130 is disposed so as to contact the outer peripheral side surface (contact surface 72) of the rotor 70. In this way, the vibration of the vibrating body 130 can be converted into rotation with high efficiency, and the rotational torque of the rotor 70 can be increased when the same vibrating body is vibrated under the same conditions by contacting the rotor 70 with a large diameter. Since it can be increased, stable driving can be continued.

  Further, the control circuit unit 60, the vibrating body mechanism unit 160, the rotor 70, the fingers 40 to 46, and the tube 50 are dispersedly arranged at positions that do not overlap with each other in a planar manner, so that further reduction in thickness can be realized. Further, since the main components can be assembled from one direction, the assemblability can be improved.

  In addition, since most of the driving mechanism of the vibrating body mechanism unit 160, the rotor 70, the cam 20, the control circuit unit 60, and the battery 61 is included in the control unit 3, the driving check is performed by the control unit alone. be able to.

  Further, when the battery 61 is provided outside the micropump 1, a long lead or battery case for connecting the battery 61 and the control circuit unit 60 is required, but there is an advantage that they are not necessary.

  Also, when the fingers 40 to 46 are a single tube unit, the position in the advancing / retreating direction is not fixed, and when the tube unit 2 is attached to the control unit 3, the cam contact portions of the fingers 40 to 46 may intersect the cam 20. is there.

  Therefore, by providing the finger guide surface 28 on the cam 20, when the tube unit 2 is mounted on the control unit 3, the cam contact portions of the fingers 40 to 46 slide on the finger guide surface 28, Move until you reach the side. Therefore, the fingers 20 to 46 can be moved to a position where the tube can be pressed by the cam 20 without performing a special operation. Further, when the tube unit 2 is attached to the control unit 3, it is possible to prevent the cam 20 or the fingers 40 to 46 from being destroyed due to interference with each other.

  Note that the micropump 1 is configured to press-close the tubes 50 by pushing the fingers 40 to 46 by the rotation of the cam 20. Therefore, it is necessary to make the arc center of the arc shape of the tube 50 coincide with the rotation center P of the cam 20.

  Therefore, if the tube unit 2 is attached to the control unit 3 by providing the control unit 3 with a guide portion including the tube unit guide shaft 121 and the tube unit 2 with the guide hole 126, the center of the arc shape of the tube 50 and the cam It is possible to match the 20 rotation centers P, and all of the plurality of fingers can reliably close the tube.

  Further, when the tube unit 2 is attached to the control unit 3, the positions of the tube unit and the control unit in the planar direction should be restricted when the cam contact portions of the fingers 40 to 46 intersect the finger guide surface 28. As a result, the assemblability can be further improved.

  Further, by providing the cam holding machine frame 18 with the protrusion 18a that suppresses the inclination of the cam 20 in the thickness direction, when the tube unit 2 is attached to the control unit 3, the cam contact portions of the fingers 40 to 46 are provided. It is possible to prevent the cam 20 from tilting on the finger guide surface 28 and inhibiting the movement of the fingers 40 to 46 to an appropriate position.

  Also, when the micropump 1 is driven, the tube pressing state of the fingers 40 to 46 due to the cam 20 staggering in the thickness direction and rotating can be suppressed.

  Furthermore, the micropump 1 according to the above embodiment includes a septum 145 as a port for injecting or sealing a liquid into the reservoir 11.

  By providing the septum 145 in the reservoir 11, it is possible to easily inject additional liquid into the reservoir 11 in a state where the reservoir 11 is connected to the tube 50 or a state where a micropump is used.

  If the reservoir 11 is made detachable from the tube 50, the micropump 1 can be used for a long period of time if the reservoir 11 containing the chemical solution is connected to the tube 50.

  In addition, in Embodiment 1 mentioned above, although the structure where the tube 50 and the reservoir | reserver 11 were integrally formed is illustrated, connecting members (not shown) like a pipe joint which can attach and detach the tube 50 and the reservoir | reserver 11 are shown. ). The connecting member preferably includes an air vent filter.

  Inside the air vent filter, a filter having a lyophilic property and forming fine holes is provided. This filter passes liquid and blocks the passage of bubbles.

The pores formed in the filter are in the range of 0.1 to 1 μm and allow the liquid to pass therethrough and suppress the intrusion of bubbles of 0.1 μm or more or 1 μm or more generated in the reservoir 11 into the tube 50.

  It is conceivable that air is dissolved in the liquid stored in the reservoir 11, and the dissolved air gathers over time to form bubbles. When a fluid is a chemical solution and is injected into a living body, if it is injected including bubbles, an influence that cannot be overlooked may occur.

Therefore, by providing an air vent filter as a connecting member between the reservoir 11 and the tube 50, it is possible to suppress bubbles from entering the living body and to improve safety.
(Embodiment 2)

Next, Embodiment 2 will be described with reference to the drawings. The second embodiment is characterized in that the configuration of the vibrating body mechanism unit is different from the first embodiment described above. Therefore, the description will focus on the differences from the first embodiment.
FIG. 13 is a plan view showing the vibrating body mechanism according to the present embodiment, and FIG. 14 is a partial cross-sectional view showing the FF section of FIG.

  13 and 14, the vibrating body mechanism unit 160 includes a vibrating body 130, a vibrating body support member 161 that supports the vibrating body 130, a vibrating body biasing member 166 that biases the vibrating body 130 toward the rotor 70, and vibration. An adjustment wheel 219 is provided as a position adjustment unit that engages with the body urging member 166 and swings the vibration body urging member 166.

  Since the configurations of the rotor 70, the vibrating body 130, and the vibrating body support member 161 are the same as those in the first embodiment, description thereof is omitted. The vibrating body urging member 166 includes an engaging portion 169 that engages with the vibrating body urging member insertion hole 162 of the vibrating body support member 161, a beam-shaped spring portion 167 that continues to the engaging portion 169, and a spring portion 167. And a substantially circular fixing portion 265 that is continuous with the base portion.

  A plurality of protrusions are formed on the outer periphery of the fixed portion 265. In this embodiment, the case where the gear part 266 is formed as a some projection part is illustrated.

  The vibrating body urging member 166 has a stepped portion in which the fixing portion 265 is planted in the second machine casing 15 in a state where the engaging portion 169 is inserted into the vibrating body urging member insertion hole 162 of the vibrating body support member 161. It is supported by a fixed shaft 218.

  As shown in FIG. 14, the fixed shaft 218 is formed of a fixed shaft portion 218a that is press-fitted into the second machine casing 15, and a flange portion 218b. In addition, lifting is suppressed by the flange portion 218b.

  The adjustment wheel 219 is formed of a gear portion 220 as a protrusion on the outer peripheral portion and a fixed shaft portion 219b that is press-fitted into the second machine casing 15. An adjustment groove 219 a is formed on the upper surface of the gear portion 220. Note that the fixed shaft portion 219b is set to have a dimension that provides a rotational torque that can rotate with respect to the second machine casing 15. The gear portion 220 meshes with the gear portion 266 of the vibrating body urging member 166.

  The second machine casing 15 is provided with markers 216a to 216e along the turning locus of the adjustment wheel 219.

  Next, a method for adjusting the position of the vibrating body 130 with respect to the rotor 70 will be described with reference to FIG. The illustrated state shows a case where the adjustment groove 219a of the adjustment wheel 219 is at a position where the marker 216c is pointed, and the vibrating body 130 is at a position where the protrusion 133a is in contact with the rotor 70.

  Here, if the adjustment wheel 219 is rotated clockwise to a position where the adjustment groove 219a indicates the marker 216a, the vibrating body biasing member 166 rotates the fixed shaft portion 218a counterclockwise about the rotation center (rotation center P2). And the engaging portion 169 moves to the illustrated engaging portion 169 ′ position.

  As a result, the vibrating body support member 161 swings the guide shaft portion 138a counterclockwise around the rotation center (rotation center P1). Then, the protrusion 133a of the vibrating body 130 intersects the rotor 70 by the intersection amount D1 (represented by the protrusion 133a ′).

  However, since the protrusion 133 a contacts the rotor 70, the crossing amount D <b> 1 becomes the rotor biasing amount of the vibrating body 130. The elastic force of the spring portion 167 corresponding to the rotor biasing amount is biased to the rotor 70.

  On the other hand, if the adjustment wheel 219 is rotated counterclockwise to a position where the adjustment groove 219a indicates the marker 216e, the vibrating body biasing member 166 rotates the fixed shaft portion 218a clockwise about the rotation center (rotation center P2). It swings and the engaging part 169 moves to the illustrated engaging part 169 "position.

  Thus, the vibrating body support member 161 swings clockwise around the guide shaft portion 138a about the rotation center (rotation center P1). Then, the protrusion 133a of the vibrating body 130 is separated from the rotor 70 by a distance D2 (represented by the protrusion 133a ″).

  Even in such a configuration, similarly to the first embodiment, the distance between the rotor 70 and the protrusion 133a is separated by a simple structure, and the range D1 between the rotor 70 and the protrusion 133a is arbitrary. The position can be adjusted to the position.

  Further, by changing the gear ratio between the gear portion 266 of the vibrating body urging member 166 and the gear portion 220 of the adjusting wheel 219, the position adjustable range of the vibrating body 130 can be easily increased or decreased.

  Further, in such a structure, the fine adjustment of the amount of rotation of the adjustment wheel 219 can particularly facilitate the fine adjustment of the crossing amount D1 (that is, the urging force).

  In the present embodiment also, the second tube guide frame 16 can be provided with a through hole that looks into the range including the adjustment wheel 219 and the markers 216a to 216e.

In this embodiment, the engaging portions of the vibrating body urging member 166 and the adjusting wheel 219 are the gear portions 266 and 220 that mesh with each other, but the vibrating body urging member 166 is swung by the rotation of the adjusting wheel 219. There is no limitation as long as the structure has movable irregularities.
(Embodiment 3)

Next, Embodiment 3 will be described with reference to the drawings. The third embodiment is characterized in that the position of the vibrating body 130 with respect to the rotor 70 can be switched to a plurality of specific positions with respect to the first and second embodiments described above. Therefore, the description will focus on the differences from the first and second embodiments.
FIG. 15 is a plan view illustrating an example of a vibrating body mechanism according to the present embodiment, and FIG. 16 is a partial cross-sectional view.

  15 and 16, the vibrating body mechanism section 160 includes a vibrating body 130, a vibrating body support member 161 that supports the vibrating body 130, and a switching member 230 that switches the swing position of the vibrating body support member 161. ing.

  Since the support structure of the rotor 70 and the vibrating body 130 is the same as that of the first embodiment, description thereof is omitted. The vibrating body support member 161 includes a rigid body portion 161a that supports the vibrating body 130 and a beam-shaped spring portion 163 that is continuous with the rigid body portion. A positioning shaft 241 is planted at the tip of the spring portion 163.

  The vibrating body support member 161 is attached to a fixed shaft 240 planted on the second machine casing 15 in a state where the vibrating body 130 and the positioning shaft 241 are fixed, and is fixed by a fixing screw 213. The fixed shaft 240 has a guide shaft portion 240a that pivotally supports the vibrating body support member 161 in a swingable manner.

  The switching member 230 is formed of a fixing portion 231, a switching portion 233 that engages with the positioning shaft 241, and a beam-like spring portion 232 that continues the fixing portion 231 and the switching portion 233.

  The switching unit 233 is formed with recesses 233a and 233b that engage with the positioning shaft 241 and a projection 233c is provided between the recesses 233a and 233b.

  The switching member 230 engages either the recess 233a or the recess 233b with the positioning shaft 241 of the vibrating body support member 161, and is positioned by the guide shaft 244 and the fixed shaft 242 planted in the second machine casing 15. It is fixed by a fixing screw 243.

  Next, a method for adjusting the position of the vibrating body 130 with respect to the rotor 70 according to the present embodiment will be described with reference to FIG. First, the vibrating body support member 161 keeps the positioning shaft 241 engaged with the recess 233 b of the switching member 230. In this state, the protrusion 133a of the vibrating body 130 is at a position separated from the rotor 70 by a distance D2 (represented by the protrusion 133a ″).

  Then, the vibrating body support member 161 is rotated counterclockwise about the guide shaft portion 240a as a rotation shaft, and the positioning shaft 241 is switched to a position where the positioning shaft 241 gets over the convex portion 233c and engages with the concave portion 233a. When the positioning shaft 241 gets over the convex portion 233c, the spring portion 232 of the switching member 230 is bent to facilitate the switching operation.

  When the positioning shaft 241 is engaged with the recess 233 a, the protrusion 133 a of the vibrating body 130 comes into contact with the rotor 70. Here, when there is no rotor 70, the protrusion 133a is movable to a position (represented by the intersection amount D1, the protrusion 133a ') that intersects the outer periphery of the rotor 70.

  At this time, the spring portion 163 of the vibrating body supporting member 161 is bent, and the elastic body presses the vibrating body 130 with an urging force corresponding to the crossing amount D1. This urging force is set so that the rotational speed, energy transmission efficiency, output torque, and the like of the rotor 70 are appropriate.

  In addition, in a state where the positioning shaft 241 is engaged with the recesses 233a and 233b, the vibrating body support member 161 is fixed to the fixed shaft 240 by the elastic force of the spring portion 232 of the switching member 230 so that the vibrating body support member 161 does not wobble. It is energizing in the direction of.

  Further, the convex portion 233c of the switching member 230 protrudes so that the positioning shaft 241 cannot get over during normal use.

  In this way, it is possible to easily switch between the two states of a state in which the vibrating body 130 is urged to the rotor 70 with an appropriate urging force and a state in which the oscillating member 130 is separated with a simple structure.

  In the present embodiment, the structure in which the recesses are provided at two locations and the position of the vibrating body 130 is switched to the two states is illustrated, but the structure can be switched to two or more states.

  For example, if a structure in which one further recess and projection are provided between the projection 233c and the recess 233a, the amount of intersection D1 between the projection 133a of the vibrating body 130 and the rotor 70 is set to an intermediate value. be able to. That is, the urging force can be switched between two levels.

  Also in the present embodiment, as in the first and second embodiments, the second tube has a through-hole that looks into the engaging portion (that is, the position adjusting portion) between the positioning shaft 241 and the switching portion 233 of the switching member 230. More preferably, the guide frame 16 is opened.

Further, the positioning shaft 241 is planted in the second machine casing 15, and the concave and convex portions similar to the concave portions 233 a and 233 b and the convex portion 233 c formed in the switching member 230 are formed at the tip of the spring portion 163 of the vibrating body supporting member 161. It is good also as a structure to provide.
(Embodiment 4)

  Next, a micro pump according to Embodiment 4 will be described with reference to the drawings. The fourth embodiment is characterized in that the rotor is formed in a ring shape, and the protruding portion of the vibrating body is disposed so as to contact the ring-shaped inner peripheral side surface of the rotor. Therefore, the description will focus on the differences from the first embodiment.

  FIG. 17 is a plan view illustrating a rotor and a vibrating body mechanism according to the fourth embodiment, and FIG. 18 is a partial cross-sectional view illustrating a part of the rotor and the vibrating body mechanism. 17 and 18, the rotor 170 is formed with a concave portion in a ring shape in the lower surface direction in the figure. And most of the vibrating body mechanism part 160 including the vibrating body 130 is disposed inside the recess.

  A groove 171 is formed on the inner peripheral side surface of the rotor 170 along the rotational direction of the rotor 170. The inner peripheral side surface of the groove 171 is an abutting surface 172 with which a protrusion 133 a provided on the vibrating body 130 abuts.

  As with the first embodiment, the rotor 170 is configured so as to be pivoted together with the cam 20 on the cam shaft 75 and rotate integrally therewith.

  In addition, although the structure demonstrated in each of Embodiment 1- Embodiment 3 mentioned above can be employ | adopted for the vibrating body mechanism part 160, in this embodiment, the same structure as Embodiment 1 (refer FIGS. 6-9). Is illustrated. However, the vibrating body 130 is supported above the vibrating body support member 161.

  Further, the configuration and driving action of the vibrating body 130 are the same as those in the first embodiment (see FIGS. 10 to 12), but the protrusion 133a contacts the contact surface 172 on the ring-shaped inner peripheral surface of the rotor 170, The rotor 170 is rotated clockwise (in the direction of arrow R in the figure).

  Here, in the vibrating body mechanism section 160, the adjusting section 168 of the vibrating body urging member 166 and the adjusting shaft 215 as the position adjusting section are disposed at positions spaced apart from the rotor 170 and the cam holder frame 18 in a plane. Has been. Therefore, the position of the vibrating body 130 relative to the rotor 170 can be adjusted by rotating the adjustment shaft 215 in a state where the rotor 170 and the vibrating body mechanism portion 160 are assembled.

  In addition, although illustration is abbreviate | omitted along the rotation locus | trajectory of the adjustment axis | shaft 215, the markers 216a-216g as shown in FIG. 6 are formed.

  In addition, a through hole 250 is formed in the upper part of the adjustment shaft 215 as in the first embodiment (see FIG. 8). The through hole 250 has a size that allows the adjustment tube 215 and the markers 216a to 216g to be seen through the first tube guide frame 17 so that the adjustment shaft 215 can be rotated from the outside.

  It is more preferable to provide a sealing member 251 that seals the through hole 250. The sealing member 251 has a structure that can be attached to and detached from the through hole 250.

  In this way, since the vibrating body 130 and the vibrating body support member 161 are disposed inside the outer diameter of the rotor 170, the micro pump 1 can be reduced in size.

  Further, even if the rotor 170 and the vibrating body 130 overlap each other by arranging the adjusting shaft 215 as a position adjusting unit at a position that does not overlap the rotor 170 and the cam holder frame 18 in a plan view, the vibrating body The position of the 130 rotors 170 can be adjusted.

In this embodiment as well, as in the first and second embodiments described above, the control unit 3 can be formed by opening a through hole in the second tube guide frame 16 to look through the adjustment shaft 215 and the marker (that is, the position adjustment portion). In this state or in the state of the micropump 1, the position of the vibrating body 130 with respect to the rotor 170 can be adjusted.
(Embodiment 5)

  Next, a micro pump according to Embodiment 5 will be described with reference to the drawings. In the fifth embodiment, the structure of the fourth embodiment described above is further simplified. The rotor is formed inside a circular recess formed in one plane of the cam, and the protrusion provided on the vibrating body has a protrusion, It is characterized in that it is disposed so as to contact the inner peripheral side surface of the recess. Therefore, the difference from the fourth embodiment will be mainly described.

  FIG. 19 is a partial cross-sectional view illustrating a part of the control unit according to the fifth embodiment. In FIG. 19, a ring-shaped recess is formed in the lower surface of the cam 20 (the surface in the direction of the second machine casing 15), and the vibrating body 130 and the vibrating body support member 161 are disposed inside the recess. Therefore, this ring-shaped recess formed in the cam 20 corresponds to the rotor 170.

  A groove 171 is formed on the inner peripheral side surface of the rotor 170, and an abutting surface 172 on which the protrusion 133 a provided on the vibrating body 130 abuts is formed on the inner side surface of the groove 171. That is, the rotor function is formed integrally with the cam 20.

  In addition, although the structure demonstrated in each of Embodiment 1- Embodiment 3 mentioned above can be employ | adopted for the vibrating body mechanism part 160, in this embodiment, it is the same structure as Embodiment 1 (refer FIGS. 6-9). Is illustrated. However, the vibrating body 130 is supported above the vibrating body support member 161.

  In addition, the configuration and driving action of the vibrating body 130 are the same as those in the first embodiment (see FIGS. 10 to 12). However, as in the fourth embodiment (see FIGS. 17 and 18), the protruding portion 133a has the rotor 170. The ring 170 is brought into contact with the contact surface 172 on the inner peripheral side surface of the ring, and the rotor 170 is rotated in the clockwise direction.

  Here, as in the fourth embodiment (see FIG. 17), in the vibrating body mechanism section 160, the adjusting section 168 of the vibrating body urging member 166 and the adjusting shaft 215 as the position adjusting section are the rotor 170 and the cam holding. It is disposed at a position spaced apart from the machine casing 18 in a plane. Therefore, the position of the vibrating body 130 relative to the rotor 170 can be adjusted by rotating the adjustment shaft 215 in a state where the rotor 170 and the vibrating body mechanism portion 160 are assembled.

  In addition, although illustration is abbreviate | omitted along the rotation locus | trajectory of the adjustment axis | shaft 215, the markers 216a-216g as shown in FIG. 6 are formed.

With such a configuration, the rotor 170 and the cam 20 can be integrally formed. Therefore, the structure can be simplified and the thickness can be reduced.
(Embodiment 6)

  Next, a micro pump according to Embodiment 6 will be described with reference to the drawings. The sixth embodiment is characterized in that the vibrating body mechanism unit, the rotor, the control circuit unit, and the power source are distributed on substantially the same plane of the control unit. Therefore, the same reference numerals are given to the same functional elements, focusing on the differences from the first embodiment.

  FIG. 20 is a cross-sectional view illustrating a drive unit according to the sixth embodiment. 20 corresponds to the A-P-B cut plane shown in FIG. 2, and the control circuit unit is omitted.

  The cam 20 and the rotor 70 are pivotally supported between a bearing 93 provided on the second machine casing 15 and a bearing 92 provided on the cam holding machine casing 18 in a state of being fixed to the camshaft 75. ing. Here, since the shaft hole of the bearing 93 is not penetrated, the airtightness of the space 30 is ensured.

  The vibrating body support member 161 is pivotally fixed to a fixed shaft 138 planted on the second machine casing 15. The vibration body 130, the structure for fixing the vibration body 130 to the vibration body support member 161, and the engagement structure between the vibration body support member 161 and the vibration body biasing member 166 are described in the first embodiment (see FIGS. 6 to 9). Is the same.

  The protrusion 133 a of the vibrating body 130 is in contact with a contact surface 72 in a groove 71 formed on the outer peripheral side surface of the rotor 70.

  A circuit board 63 is provided on the surface of the second machine casing 15, and a control circuit unit 60 (not shown) is connected and fixed to the upper surface thereof. A battery 61 is disposed on the upper surface of the circuit board 63.

  The battery 61 is inserted into a hole formed in the cam holder frame 18 and is held by the battery lid 19. Here, the surface of the battery 61 on the circuit board side is a minus electrode, and the minus electrode is pressed against the circuit board 63 by the battery lid 19 to be connected to a connection pattern (not shown). On the other hand, the side surface of the battery 61 is a positive electrode and is connected to a connection pattern (not shown) by the battery terminal 62.

  The battery lid 19 is formed with a screw portion 19b, and the battery lid 19 and the cam holder frame 18 are screwed and fixed. Therefore, in the state of the control unit 3, the battery lid 19 can be rotated and removed by a coin or a driver using the opening / closing groove 19 a formed in the battery lid 19, and the battery can be taken out or attached.

  Therefore, as shown in FIG. 20, the rotor 70 (including the cam 20), the vibrating body mechanism unit 160, the battery 61, and the control circuit unit 60 are disposed on the same surface of the second machine casing 15. It is supported between the cam holder frame 18.

  And the vibrating body mechanism part 160, the battery 61, and the control circuit part 60 are arrange | positioned so that it may not mutually overlap.

  The adjustment shaft 215 as an adjustment unit of the vibrating body mechanism unit 160 is disposed at a position that does not overlap with the cam holder frame 18, and enables the position adjustment of the vibrating body 130 (protrusion 133 a) with respect to the rotor 70. .

  In this way, the control unit 3 is configured, the tube unit 2 is mounted on the control unit 3 from above, and is fixed by the fixing screw 91 as shown in FIG.

  According to the sixth embodiment described above, the rotor 70 (including the cam 20), the control circuit unit 60, and the battery 61 are held between the cam holding machine frame 18 and the second machine frame 15. Therefore, the first machine casing 14 used in the first embodiment (see FIG. 3) is not required, and the thickness can be reduced.

  In addition, the vibrating body mechanism unit 160, the control circuit unit 60, and the battery 61 are arranged in a distributed manner so that the tube 50 and the fingers 40 to 46 do not overlap each other in a plane. And since these are accommodated in the space 30 of the tube unit 2, even if it is the stacked structure of the tube unit 2 and the control unit 3, the micropump 1 can be reduced in thickness.

  Further, the cam 20, the vibrator mechanism unit 160, the control circuit unit 60, and the battery 61 are dispersedly arranged on the one surface side of the second machine casing 15, thereby enabling assembly from one direction and improving assemblability. .

  Furthermore, in such a configuration, the battery 61 can be replaced in the state of the control unit 3 alone. That is, the battery 61 can be replaced independently in the state of the control unit 3 in accordance with the replacement time of the tube unit 2, eliminating the troublesomeness of taking out the battery 61 and damaging other peripheral members at the time of replacement. Can be eliminated.

In the present embodiment, the structure in which the protrusion 133a of the vibrating body 130 is brought into contact with the contact surface 72 on the outer peripheral side surface of the rotor 70 has been described as an example. However, the fourth embodiment described above (see FIGS. 17 and 18). It is also possible to adapt to a configuration in which the protrusion 133a contacts the contact surface 172 on the inner peripheral side surface of the rotor 170 shown in the fifth embodiment (see FIG. 19).
(Embodiment 7)

  Next, Embodiment 7 will be described with reference to the drawings. The seventh embodiment is characterized in that a speed reducing mechanism or a speed increasing mechanism is provided between the rotor and the cam. Here, an example of the speed reduction mechanism will be described.

  FIG. 21 is a plan view showing a micropump according to the seventh embodiment, and FIG. 22 is a partial cross-sectional view showing an LL cut surface of FIG. 21 and 22, the speed reduction mechanism of the present embodiment includes a cam gear 101 provided on the cam 20, a rotor gear 105 provided on the rotor 70, and an intermediate wheel 102 that meshes with the cam gear 101 and the rotor gear 105. It is composed of

  The cam gear 101 is fixed to the cam shaft 75 together with the cam 20 and is supported by bearings 92 and 93. The intermediate wheel 102 has an intermediate gear 103 and is pivotally supported by a bearing 95 provided in the second machine casing 15 and a bearing 94 provided in the intermediate wheel receiver 110. The intermediate wheel receiver 110 is fixed to the second machine casing 15 with a fixing screw or the like.

  On the other hand, the rotor gear 105 is formed on a rotor shaft 104 that fixes the rotor 70, and is supported by a bearing 97 provided on the second machine frame 15 and a bearing 96 provided on the cam holding machine frame 18.

  In addition, the vibrating body mechanism unit 160 exemplifies the same structure as that of the first embodiment (see FIGS. 6 to 9), but is arranged on a stand protruding in the thickness direction of the second machine casing 15. Thus, the cross-sectional positions of the vibrating body 130 and the rotor 70 are matched.

  The shape of the rotor 70 is the same as that of the first embodiment (see FIG. 3) described above. A groove 71 is formed on the outer peripheral side surface of the rotor 70 along the rotation direction. Is the contact surface 72 with the protrusion 133a.

  The configuration and operation of the vibrating body 130 are the same as those in the first embodiment (see FIGS. 10 to 12), and the contact relationship between the vibrating body 130 and the rotor 70 is the same as that in the first embodiment. Omitted.

  The rotor 70 is rotated by the vibration of the vibrating body 130, and the rotation of the rotor 70 is transmitted to the cam 20 via the rotor gear 105, the intermediate gear 103, and the cam gear 101. By providing the intermediate wheel 102, the cam 20 rotates in the same direction as in the first embodiment (see FIG. 2).

  Here, the gear ratio between the rotor gear 105 and the cam gear 101 is a reduction gear ratio, and the reduction gear ratio can be appropriately changed according to the gear ratio between the rotor gear 105 and the cam gear 101. Further, if the intermediate wheel 102 is configured with a large gear and a small gear, the reduction ratio can be further increased. In addition, what is necessary is just to use the gear ratio of each gear as a speed-up gear mechanism when speeding up.

  Thus, by providing a speed reduction mechanism or speed increasing mechanism between the cam 20 and the rotor 70, the rotational speed of the cam 20 can be changed while the rotational speed of the rotor 70 is kept constant. That is, the flow amount of liquid per unit time can be appropriately adjusted.

  Further, by providing the control unit 3 with movable mechanisms such as the vibrating body 130, the rotor 70, the speed reduction mechanism, and the cam 20, no connection mechanism is required between the control unit 3 and the tube unit 2, and the assemblability is improved. .

  In the present embodiment, the structure in which the protrusion 133a of the vibrating body 130 is brought into contact with the contact surface 72 on the outer peripheral side surface of the rotor 70 has been described as an example. However, the fourth embodiment described above (see FIGS. 17 and 18). It is also possible to adapt to a configuration in which the protrusion 133a contacts the contact surface 172 on the inner peripheral side surface of the rotor 170 shown in the fifth embodiment (see FIG. 19).

  The micropump 1 according to the first to seventh embodiments described above can be reduced in size and thickness, and can stably flow continuously at a minute flow rate. It is suitable for medical use such as development of new drugs and drug delivery. Moreover, in various mechanical devices, it can be mounted in the device or outside the device and used for transporting fluids such as water, saline, chemicals, oils, fragrances, inks and gases. Furthermore, the micropump alone can be used for fluid flow and supply.

The micropump which concerns on Embodiment 1 is shown, (a) is a top view, (b) is a front view. FIG. 3 is a plan view illustrating a configuration of a drive unit according to the first embodiment. Sectional drawing which shows the AP cross section of FIG. FIG. 3 is a partial cross-sectional view showing a finger holding structure according to the first embodiment. The fragmentary sectional view which shows typically the mounting structure to the control unit of the tube unit which concerns on Embodiment 1. FIG. FIG. 3 is a plan view illustrating a configuration of a vibrating body mechanism according to the first embodiment. Sectional drawing which shows the BB cut surface of FIG. Sectional drawing which shows the DD cut surface of FIG. The fragmentary sectional view which shows the EE cut surface of FIG. FIG. 3 is a perspective view illustrating a configuration of a vibrating body according to the first embodiment. FIG. 3 is a partial plan view schematically showing the action of the vibrating body according to the first embodiment. FIG. 3 is an explanatory diagram schematically illustrating the movement of the protrusion according to the first embodiment. FIG. 6 is a plan view showing a vibrating body mechanism according to a second embodiment. The fragmentary sectional view which shows the FF cut surface of FIG. FIG. 9 is a plan view illustrating an example of a vibrating body mechanism according to a third embodiment. FIG. 9 is a partial cross-sectional view illustrating an example of a vibrating body mechanism according to a third embodiment. FIG. 6 is a plan view showing a rotor and a vibrating body mechanism according to a fourth embodiment. FIG. 10 is a partial cross-sectional view illustrating a part of a rotor and a vibrating body mechanism according to a fourth embodiment. FIG. 9 is a partial cross-sectional view illustrating a part of a control unit according to a fifth embodiment. FIG. 10 is a cross-sectional view illustrating a drive unit according to a sixth embodiment. FIG. 10 is a plan view showing a micropump according to a seventh embodiment. The fragmentary sectional view which shows the LL cut surface of FIG.

  DESCRIPTION OF SYMBOLS 1 ... Micro pump, 2 ... Tube unit, 3 ... Control unit, 11 ... Reservoir, 20 ... Cam, 40-46 ... Finger, 50 ... Tube, 60 ... Control circuit part, 61 ... Battery, 70 ... Rotor, 130 ... Vibration Body, 160 ... vibrating body mechanism.

Claims (20)

A tube partially disposed in an arc shape and having elasticity, a plurality of fingers radially disposed from the central direction of the arc shape of the tube, a guide frame that holds the tube and the plurality of fingers, A tube unit having
From a position where the rotating shaft substantially coincides with the center of the arc shape of the tube, a rotor for transmitting a rotational force to the cam, a position where the vibrating body and the vibrating body are urged to the rotor, and a position where the rotor is separated from the rotor A control unit having a vibrator mechanism unit having a position adjustment unit that can be adjusted to an arbitrary position within the range of
A reservoir in communication with the tube;
A control circuit unit for inputting a drive signal to the vibrating body;
A power source for supplying power to the control circuit unit;
Is provided,
The tube unit and the control unit are stacked and attached and detachable,
By applying an alternating voltage to the vibrating body, the vibrating body vibrates, a rotational force is repeatedly applied to the rotor, the cam sequentially pushes the plurality of fingers from the fluid inflow side to the outflow side, and the tube A micropump characterized by transporting fluid by repeatedly closing and closing. The micropump according to claim 1,
The micropump characterized in that the control circuit unit and the power source are arranged in the control unit. The micropump according to claim 1,
The micropump characterized in that the cam, the rotor, and the vibrating body mechanism are disposed in a recess formed in the guide frame. The micropump according to claim 1,
The rotor has a disk shape;
The micropump characterized in that the protrusion of the vibrating body is disposed so as to abut on the outer peripheral side surface of the rotor. The micropump according to claim 1,
The rotor has a ring shape;
The micropump according to claim 1, wherein the protrusion of the vibrating body is disposed so as to contact the ring-shaped inner peripheral side surface of the rotor. The micropump according to claim 1,
The rotor is formed inside a ring-shaped recess formed in one plane of the cam;
The micropump characterized in that the protrusion of the vibrating body is disposed so as to contact the inner peripheral side surface of the recess. In the micropump according to any one of claims 1 to 6,
The cam is substantially perpendicular to a rotation plane of the cam, and has an outer peripheral side surface having projections and depressions for closing or opening the tubes with the fingers, and a direction in which the tube unit of the cam is mounted. A finger guide surface comprising a slope or a curved surface continuous from the rotation plane to the outer peripheral side surface,
When the tube unit is attached to the control unit, the cam contact portion formed on the plurality of fingers is moved along the finger guide surface to a position where the cam contact portion contacts the outer peripheral side surface. Micro pump. In the micropump according to any one of claims 1 to 7,
When mounting the tube unit to the control unit,
A micropump characterized in that a guide portion that substantially matches the arc-shaped center of the tube and the rotation center of the cam is provided between the tube unit and the control unit. The micropump according to claim 7 or claim 8,
When the tube unit is attached to the control unit, the guide portion regulates the position of the tube unit and the control unit in the planar direction when the cam contact portion contacts the finger guide surface. A micropump characterized by that. The micropump according to any one of claims 1 to 9,
The control unit includes a cam holder frame that pivotally supports the cam;
A micropump characterized in that a protrusion for suppressing inclination of the cam in the thickness direction is provided on the cam or the cam holder frame. The micropump according to claim 1,
The vibrating body mechanism portion is continuous to a vibrating body support member that holds the vibrating body, a beam-shaped spring portion having a front end portion engaging with the vibrating body support member, and a base portion of the spring portion. An oscillating body biasing member having a substantially horseshoe-shaped adjusting portion, and an adjusting shaft having a rotating shaft portion and an adjusting shaft portion that is eccentric with respect to the rotation center of the rotating shaft portion and is fitted to the adjusting portion. A position adjustment unit,
The vibrating member urging member is swung around a guide shaft disposed between the spring portion and the adjusting shaft by the rotation of the adjusting shaft. The micropump characterized by adjusting the position of the vibrating body with respect to the position of the rotor. The micropump according to claim 1,
The vibrating body mechanism portion is continuous to a vibrating body support member that holds the vibrating body, a beam-shaped spring portion having a front end portion engaging with the vibrating body support member, and a base portion of the spring portion. A vibration member urging member having a plurality of protrusions formed along the outer periphery of the substantially circular fixed portion, and a position including an adjustment wheel having a protrusion engaging with the protrusions of the vibration member on the outer periphery. An adjustment unit,
The vibrating body urging member is swung around a fixed shaft that pivotally supports the fixed portion by the rotation of the adjusting wheel, and the position of the vibrating body is changed as the vibrating body urging member swings. A micro pump characterized by adjusting the position of the rotor. The micropump according to claim 11 or 12,
A micropump comprising a marker representing a rotation amount along a rotation locus of the adjustment shaft or the adjustment wheel. The micropump according to claim 1,
A vibrating body urging member, wherein the vibrating body mechanism section includes a vibrating body support section that supports the vibrating body, a beam-shaped spring section that is continuous with the vibrating body support section, and a positioning shaft that is provided at the tip of the spring section. And a position adjustment portion comprising a switching member having a plurality of recesses that engage with the positioning shaft,
The micro-pump is characterized in that the concave portion is disposed so as to restrict the vibrating body to a position away from the rotor and a position to bias the rotor. The micropump according to any one of claims 11 to 14,
The micropump characterized by the above-mentioned. The through-hole which looks into the position adjustment part of the said vibrating body mechanism part from the outside is provided. The micropump according to claim 15,
A micropump comprising a sealing member for sealing the through hole. The micropump according to claim 1,
The micro pump according to claim 1, wherein the vibrating body mechanism unit, the rotor, the control circuit unit, and the power source are distributed on substantially the same plane of the control unit. The micropump according to claim 1 or 2,
A connecting member that allows the tube and the reservoir to be detachable;
The micropump characterized in that the connecting member includes an air vent filter. The micropump according to claim 1,
The micropump characterized by having a port for injecting or sealing a fluid into the reservoir. The micropump according to claim 1,
A micropump comprising a speed reduction mechanism or a speed increase mechanism between the rotor and the cam.

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