JP3446550B2 - Linear electromagnetic solenoid - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear electromagnetic solenoid that can be used in an actuator for driving electric equipment, a driving part of a massage machine, and the like.

[0002]

2. Description of the Related Art As a conventional linear electromagnetic solenoid of this type, there is one having a structure shown in FIG. This linear electromagnetic solenoid has a structure in which a cylindrical coil 1 is housed in a yoke 2 and a mover 3 made of a magnetic material is inserted into a central hole of the coil 1. In addition, a stator 4 magnetically coupled to the yoke 2 is arranged in one end of the coil 1 in order to apply an attractive force to the mover 3 by exciting the coil 1. The mover 3 is movable in the axial direction of the coil 1, and the stator 4 is arranged so as to face one end surface of the mover 3 in the moving direction.

In this structure, a part of the mover 3 is replaced by the coil 1.
When the coil 1 is excited in a state where the coil 1 is inserted in the inside and the mover 3 is separated from the stator 4, the mover 4 is moved in a direction to reduce the magnetic resistance of the magnetic path formed by the yoke 2, the mover 3 and the stator 4. Moves, and the mover 3 is attracted to the stator 4.

[0004]

By the way, since the stator 4 is arranged so as to face the mover 3 in the above-mentioned structure, if the mover 3 moves, it will collide with the stator 4. Impulsive sound is generated. In particular, if magnetic saturation does not occur in the magnetic path described above, a force acts between the mover 3 and the stator 4 so as to be inversely proportional to the square of the distance between them.
Immediately before the mover 3 collides with the stator 4, a very large thrust acts on the mover 3, and the impact sound becomes louder.

It has been considered to provide a cushioning member made of an elastic material in order to reduce such impact noise.
Since the stator and the stator 4 collide with each other, the effect of the buffer is insufficient, and there is a problem that a large noise is generated during operation. Further, it is considered that the mover 3 is operated in the magnetic saturation region, and as shown in FIG.
With a short stroke, thrust can be kept almost constant. In the characteristic shown in the figure, the stroke is shown by the distance of the mover 3 with respect to the stator 4, and it can be seen that the thrust (static thrust) is kept substantially constant up to about 7 mm. If the design is made so as to obtain such characteristics, the impact noise can be alleviated to some extent, but even then, the mover 3 still collides with the stator 4, and it is not possible to achieve sufficient noise reduction.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a linear electromagnetic solenoid with less noise.

[0007]

According to a first aspect of the present invention, there is provided a coil, a yoke that is magnetically coupled to both poles of the coil and has a part of a magnetic path open, and a direction that connects the open ends of the magnetic path in the yoke. The movable element is provided with a movable element that is linearly movable, and the movable element is formed by a magnetic element element body that is continuously provided in the movement direction and a non-magnetic element connection body that is interposed between adjacent element elements. Is
Magnetic pole pieces that extend along the moving direction of the mover are formed on both sides of the open end of the magnetic path in the yoke. An auxiliary member made of a magnetic material is disposed at a position straddling the side surfaces of the child element body , and
The position where the thrust acting on the mover becomes maximum and the auxiliary force
The thrust force acting on the mover is maximized by the auxiliary member.
The pole piece, the auxiliary member, and the front
The positional relationship with the movable element body is set . According to this structure, since the mover moves without colliding with other members, only a friction noise is generated when the mover moves, and noise can be significantly reduced as compared with the conventional structure. Further, the mover is composed of a plurality of mover bodies and the connecting body, and the auxiliary member is arranged between the magnetic pole pieces, so that the thrust can be applied to the mover at a plurality of positions. The thrust acting on the entire mover becomes large. That is, it is possible to provide a high-output and low-noise linear electromagnetic solenoid.

Furthermore, by the maximum point of the thrust that acts on the plunger coincides with the maximum point and the auxiliary member thrust acting from the magnetic pole piece to the movable member, to increase the maximum value of the thrust that acts on the plunger Therefore, the operation is suitable for applications requiring a large thrust in a short time.

According to a second aspect of the present invention, in the first aspect of the invention, the mover is composed of two mover elements. This configuration is the preferred embodiment. According to a third aspect of the invention, in the first aspect of the invention, the mover has a cylindrical shape. This configuration is the preferred embodiment. According to a fourth aspect of the present invention, in the first to fourth aspects of the invention, the magnetic pole piece, the auxiliary member, and the mover element located on the front side when the mover moves with the excitation of the coil. At least one of the front end of the body is formed with an inclined portion that is inclined so that the distance between the movable element and the magnetic pole piece or the auxiliary member increases toward the front. According to this configuration, it becomes possible to set various relationships between the movement of the mover and the thrust by adjusting the inclination angle of the inclined portion. For example, if the inclination angle of the inclined portion is made large, the thrust of the mover does not become extremely large in the vicinity of the final stop position of the mover, and the width of change in thrust can be reduced, which facilitates control. Further, if the inclination angle of the inclined portion is reduced, the maximum value of the thrust acting on the mover can be increased, and it can be used for applications requiring a large thrust in a short time.

According to a fifth aspect of the invention, in the fourth aspect of the invention, the inclined portion is shorter than the magnetic pole piece or the auxiliary member in the moving direction of the mover. According to this configuration, when the mover is moved to the desired position, no reverse force acts on the mover, and a large thrust can be obtained. Contract
The invention according to claim 6 is, in the invention according to claim 1, located on a rear side when the mover moves along with the excitation of the coil at the time point when the maximum thrust force is applied to the mover by the excitation of the coil. The size of the mover is set so that the rear end of the magnetic pole piece and the rear end face of the mover are flush with each other. With this configuration, the mover has a minimum dimension in which a force in the direction opposite to the direction in which the mover is moved does not act. That is, although the thrust acts on the mover by the magnetic force between the one end of the mover and the magnetic pole piece, it does not contribute to the thrust on the other end of the mover. If so, when the thrust acting on the mover becomes maximum, a force opposite to the thrust acts on the mover. Therefore, by setting the above size, the mover having the minimum size in the range where the force in the direction opposite to the thrust does not act can be used, and as a result, a small and lightweight linear electromagnetic solenoid can be provided.

According to a seventh aspect of the invention, in the first aspect of the invention, the rear side when the mover moves along with the excitation of the coil at the time of application of the maximum thrust to the mover due to the excitation of the coil. The size of the mover is set so that the rear end of the mover extends rearward from the rear end of the magnetic pole piece located at. According to this configuration, since a sufficiently long mover is used, a force in the direction opposite to the thrust does not act on the mover.

According to an eighth aspect of the present invention, in the first aspect of the present invention, at least one end of the mover is provided with a connecting member that is connected to a load to be controlled. This configuration facilitates coupling with the load. According to a ninth aspect of the invention, in the first aspect of the invention, the yoke is formed by coupling a yoke body magnetically coupled to the coil and a magnetic pole member including a magnetic pole piece. Since the yoke is composed of the yoke main body and the magnetic pole member in this way, even if the coil, the yoke, and the magnetic pole piece have complicated shapes, processing and assembling are relatively easy.

According to a tenth aspect of the present invention, in the first aspect of the present invention, the yoke is formed in a shape surrounding the coil, a pole piece is extended inside, and the mover is inserted inside the yoke. It is a thing. This configuration is a preferred embodiment, and since the yoke surrounds the coil and the pole piece and the mover are provided inside the yoke, leakage of magnetic flux is reduced and magnetic efficiency is increased.

According to the invention of claim 11, in the invention of claim 1, the yoke is formed in a cylindrical shape surrounding the coil, a pole piece is extended in a cylinder, and the mover is inserted in the cylinder. There is something. This configuration is a preferred embodiment, and since the yoke surrounds the coil and the pole piece and the mover are provided in the cylinder of the yoke, leakage of magnetic flux is reduced and magnetic efficiency is increased.

The invention of claim 12 is the same as claim 10 or the contract.
In the invention of claim 11 , an air vent that penetrates in and out is formed in the yoke. With this configuration, heat from the coil, frictional heat generated by the movement of the mover, and the like can be released from the vent hole, which facilitates heat countermeasures. According to a thirteenth aspect of the present invention, in the first aspect of the invention, the yoke and the mover are connected via a spring. According to this structure, a restoring force can be applied to the mover by the spring, and there is no limitation in the direction of use, and the application is expanded.

According to a fourteenth aspect of the invention, in the thirteenth aspect of the invention, the spring is selected so that resonance does not occur in the vibration system including the spring. According to this structure, since the resonance does not occur, the cycle of the reciprocating motion of the mover can be freely selected. In other words, it is suitable for applications in which the cycle of reciprocating motion of the mover is changed. Claim
According to a fifteenth aspect of the invention, in the thirteenth aspect of the invention, the spring is selected so that resonance occurs in a vibration system including the spring. According to this configuration, the thrust of the mover can be increased by utilizing the resonance.

According to a sixteenth aspect of the present invention, in the invention of the first aspect, a massage treatment element is attached to at least one end surface of the mover. According to this configuration, a massage effect can be obtained by bringing the treatment element into contact with the human body and reciprocating the movable element.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION (Basic Configuration) A basic configuration common to each of the embodiments described below will be described.
Explain. As shown in FIG. 1, a coil 1 formed by winding a winding wire around a coil bobbin 11 of a non-magnetic material (usually synthetic resin is used) having flanges 11a at both ends is housed in a cylindrical yoke 2. ing. The coil bobbin 11 is formed in a tubular shape, and a through hole 11b is formed in the center thereof. The yoke 2 has a cylindrical shape, and insertion holes 2a and 2b are formed on the upper bottom surface and the lower bottom surface of the coil bobbin 11 coaxially with the through hole 11b of the coil bobbin 11, and the coil bobbin 11 is provided on the periphery of the insertion holes 2a and 2b.
Magnetic pole pieces 5a and 5b inserted into a part of the through hole 11b are extended. Further, a cylindrical mover guide 12 is disposed so as to be inscribed in the magnetic pole pieces 5a and 5b and straddle between the magnetic pole pieces 5a and 5b. The mover 3 is inserted into the mover guide 12 in a form in which the mover 3 is restricted in movement so that it can only move straight in the axial direction of the mover guide 12.

The mover 3 is made of a non-magnetic material that connects between three cylindrical mover elements 13 each made of a magnetic material and the mover element bodies 13 adjacent to each other in the axial direction of the mover guide 12. And the connecting body 14. That is, a gap corresponding to the size of the connecting body 14 is formed between the adjacent movable element bodies 13. On the other hand, auxiliary members 6a and 6b made of a magnetic material and formed in a ring shape are provided on the outer circumference of the mover guide 12 at two locations between the magnetic pole pieces 5a and 5b. The positions of the auxiliary members 6a and 6b are set so that the peripheral surfaces (side surfaces) of both ends of the mover 3 face the magnetic pole pieces 5a and 5b, respectively.
It is set so as to correspond to the gap formed between the movable element bodies 13, and at this time, the widths of the auxiliary members 6a and 6b are set to such an extent that they straddle the two movable element bodies 13 (that is, the gaps). Wider than that). The auxiliary member 6
Needless to say, an appropriate supporting member is provided to maintain the positions of a and 6b.

Now, assume that the mover 3 is pulled up slightly above the state of FIG. 1, and the peripheral surface of the other end of the mover 3 faces the pole piece 5a. In this state, when the coil 1 is energized to excite the coil 1, the magnetic flux generated by the coil 1 tries to reduce the magnetic resistance of the magnetic path formed by the yoke 2 and the mover 3 and the mover 3 and the pole piece. Since the suction force is applied between the movable element 3 and 5b, the mover 3 moves downward. That is, the mover 3 receives downward thrust and moves downward while slidingly contacting the mover guide 12. FIG. 2 shows the distribution of magnetic flux when the mover 3 is stopped. In this way, the yoke 2, the pole pieces 5a and 5b,
Since the closed magnetic circuit is formed by the mover element body 13 and the auxiliary members 6a and 6b, high magnetic efficiency and high output can be obtained.

If the above-mentioned structure is adopted, the mover 3 moves straight while slidingly contacting the inner peripheral surface of the mover guide 12, so that the mover 3 does not collide with other members, and only friction noise is generated. Since it does not exist, noise during operation can be significantly reduced as compared with the conventional configuration. Moreover, the mover 3 is divided into a plurality of mover elements 13, and each of the pole pieces 5b is divided into
Alternatively, the suction force from the auxiliary members 6a and 6b is applied,
In addition, since the facing area between the magnetic pole piece 5a and the mover 3 is large, the thrust acting on the entire mover 3 can be made relatively large. That is, a low-noise and high-output linear electromagnetic solenoid can be obtained. Na us, but do not describe member for applying a restoring force to the mover 3, when the state of FIG. 1 is used in upside down it can be returned by gravity. Further, as will be described later, a return spring can be provided if necessary.

(Embodiment 1) In the present embodiment, as shown in FIG. 3, by changing the size of the movable element body 13 or the connecting body 14 forming the movable element 3 to the basic configuration , Child element 13 and pole piece 5
The thrust acting between b and the auxiliary members 6a and 6b is
It is set to maximize at the same position. That is, the position of the mover 3 when the thrust acting on the mover 3 by the magnetic pole piece 5b is maximized, and the mover 3 when the thrust acting on the mover 3 by the auxiliary members 6a and 6b is maximized.
Match the position of. This increases the maximum thrust value. In other words, the structure is suitable for applications that require high output in a short time. Other configurations and operations are similar to the basic configuration .

(Embodiment 2) In the present embodiment, as shown in FIG. 4, the number of the mover element bodies 13 forming the mover 3 is two. In this structure, the number of auxiliary members 6 is one. According to the experimental results, when the other members having the same specifications were used, the output of the present embodiment was the maximum. Other configurations and operations are the same as the basic configuration .

(Third Embodiment) In the present embodiment, as shown in FIG. 5, a taper (inclined portion) 15 is formed at one end of each movable element body 13. The taper 15 is formed on the front side (lower side in FIG. 5) when the movable element 3 is operated by applying a thrust force, and is formed in a shape such that the diameter of the movable element body 13 is reduced toward the front.

In this case, the thrust of the mover 3 has the characteristic shown in FIG. The angle of the taper 15 is shown as the angle with respect to the front end face of the mover 3 with 0 ° when the mover element body 13 has a constant diameter. According to FIG. 6, the taper 15
It can be seen that the smaller the angle of, the narrower the section where thrust is generated, but the larger the maximum value of thrust. That is, taper 1
When 5 is not formed, the maximum thrust value becomes the largest. A linear electromagnetic solenoid that can obtain high output in a short time can be configured. On the other hand, when the taper 15 is provided, the maximum value of the thrust becomes small, but the change in the thrust becomes small as a whole, so that a linear electromagnetic solenoid that can be easily controlled can be configured.

In the structure of FIG. 5, the length of the taper 15 in the vertical direction (that is, the moving direction of the mover 3) is shorter than that of the magnetic pole piece 5b. That is, when the length of the taper 15 in the vertical direction is longer than that of the magnetic pole piece 5b, a force in the direction opposite to the thrust acts on the mover 3, but this is prevented, and the thrust of the mover 3 is large and high output is achieved. Will be possible. Other configurations and operations are similar to those of the second embodiment .

(Embodiment 4) In the present embodiment, as shown in FIG. 7, the partial surface of the mover 3 on the side that does not contribute to the thrust at the position where the thrust of the mover 3 is maximum (the upper side in FIG. 7) is The length of the mover 3 is set so as to be flush with the upper end of the pole piece 5a. This length is such that when the thrust of the mover 3 is maximum, the pole piece 5a and the mover 3 are
It is possible to provide a small-sized and lightweight linear electromagnetic solenoid while ensuring a high output because it has the shortest dimension that does not generate a force opposite to the thrust force between and. Further, it is possible to prevent an increase in the material cost of the mover 3. Other configurations and operations are similar to those of the third embodiment .

When there is no particular need for downsizing and weight reduction, and a slight increase in material cost is not a problem, as shown in FIG. 8, the upper end of the mover 3 is moved when the thrust of the mover 3 is maximum. The length may be such that it projects from the pole piece 5a. In this case, the force opposite to the thrust does not act on the mover 3 in a wide movement range, and the thrust is improved as a whole.

(Embodiment 5) In the present embodiment, as shown in FIG. 9, a connecting member 7 that is coupled to a load to be controlled is fixedly provided at one end (lower end in the illustrated example) of the mover 3. . The connecting member 7 has a rod shape as shown in FIG. 10, and can be easily connected to another load. By providing such a connecting member 7, the output can be easily given to the load. Other configurations and operations are similar to those of the third embodiment .

Embodiment 6 By the way, as described above, the yoke 2 has magnetic pole pieces 5 a, 5
Since b is provided and the magnetic pole edges 5a and 5b are inserted inside the coil bobbin 11, complicated processing is required if the yoke 2 is formed of one member. Therefore, as shown in FIG. 11, the cylindrical yoke body 16 and the yoke body 1
It is desirable that the yoke 2 be formed by coupling a pair of annular magnetic pole members (members provided with the magnetic pole pieces 5a and 5b) having a substantially L-shaped cross section, which is a separate body from the yoke 6. With this configuration, the coil 1 can be easily assembled by housing the coil 1 in the yoke 2 and then coupling the magnetic pole members. Further, the yoke body 16 and the magnetic pole member can be processed relatively easily. Since it is necessary to house the coil 1 in the yoke body 16, it is desirable to form the yoke body 16 by connecting the flat base plate 16a and the cylindrical cap 16b. Other configurations and operations are similar to those of the third embodiment .

(Embodiment 7) In each of the above-described embodiments, a cylindrical yoke 2 as shown in FIG. 12 is provided, and the coil 1 is built in the yoke 2. The mover 3 is also arranged in the yoke 2. As described above, the coil 1 is surrounded by the yoke 2 which is a magnetic body, and the mover 3 and the magnetic pole pieces 5 a and 5 b are provided inside the yoke 2, so that the yoke 2
Will function as a magnetic shield, and the magnetic flux leakage to the outside of the yoke 2 will be reduced. That is, since the leakage magnetic flux is small, the magnetic efficiency is high, resulting in a high output. Here, since the coil 1 and the mover 3 are arranged in the yoke 2, it is considered that the heat generated by the coil 1 and the frictional heat associated with the movement of the mover 3 are less likely to be released. Therefore, in the present embodiment, as shown in FIG. 13, the vent holes 17 are formed at appropriate places in the yoke 2 so that the heat generated inside the yoke 2 can be easily released to the outside. By adopting such a configuration, it becomes easy to take measures against heat. Other configurations and operations are similar to those of the third embodiment .

(Embodiment 8) In each of the above-described embodiments, the yoke 2 is formed in a cylindrical shape, but in the present embodiment, as shown in FIG. 14, the yoke 2 is formed.
Is formed in a rectangular tube shape. With this configuration, the same effect as when the cylindrical yoke 2 is used can be obtained. Other configurations and operations are similar to those of the third embodiment .

(Embodiment 9) In this embodiment, as shown in FIG. 15, a spring 8 made of a coil spring is provided for returning the mover 3. That is, the yoke 2 and the mover 3 are connected via the spring 8. The mover 3 moves by the excitation of the coil 1, but when the power supply to the coil 1 is stopped, the mover 3 returns to its original position by the spring 8. If the restoring force of the spring 8 is applied in this manner, the mover 3 can be installed in any direction.
Can be restored, and there are less restrictions on the mounting direction.

Here, if the spring constant of the spring 8 is selected so that the resonance frequency determined by the mass of the mover 3 and the frequency at which the mover 3 reciprocates do not match, the range of the operating frequency of the mover 3 is increased. It becomes an actuator that can be used without resonance and is suitable for applications involving changes in operating frequency. Also, if the spring constant of the spring 8 is selected so that the operating frequency and the resonance frequency match, a large thrust force can be obtained by resonance, and the spring 8 can be used in applications requiring a large thrust force.

The linear electromagnetic solenoid described above is shown in FIG.
As shown in, the massager 9 can be attached to the tip of the connecting member 7 for use in a massage machine. As a massage machine, for example, FIG.
It can be used for a foot massager for massaging the sole as shown in FIG. This apparatus includes a housing 20 for placing on the floor or the like, and the housing 20 accommodates two linear electromagnetic solenoids 21 described above. Further, the treatment element 9 is coupled to the coupling member 7 of each linear electromagnetic solenoid 21. The massaging element 9 has a large number of projections 9a protruding from the portion that comes into contact with the sole of the foot. By controlling the operation of the linear electromagnetic solenoid 21 by the control circuit built in the housing 20, the massaging piece 9 can be hit on the sole of the foot. Stimulation and vibration stimulation can be given. These operations are performed by the switch group 2 provided on the upper surface of the housing 20.
Selected by 2.

[0036]

According to the invention of claim 1, a coil and a yoke which is magnetically coupled to both poles of the coil and whose magnetic path is partially opened are provided.
A movable element that is linearly movable in a direction connecting the open ends of the magnetic paths in the yoke, and the movable element is provided between a movable element body of a magnetic body that is continuously provided in the moving direction and an adjacent movable element body. And a connected non-magnetic body, and magnetic pole pieces that extend along the moving direction of the mover are formed on both sides of the open end of the magnetic path in the yoke. An auxiliary member made of a magnetic material is disposed at a position straddling the side surfaces of the adjacent movable element body at the final stop position of the movable element due to excitation , and the magnetic pole piece acts on the movable element.
The position where the force is maximized and the auxiliary member acts on the mover
The pole piece so that the position where the thrust
Since the positional relationship between the auxiliary member and the mover body is set , and the mover moves without colliding with other members, only a friction noise is generated when the mover moves. Thus, there is an advantage that noise can be significantly reduced as compared with the conventional configuration. Further, the mover is composed of a plurality of mover element bodies and the connecting body, and by arranging the auxiliary member between the magnetic pole pieces, thrust can be applied to the mover at a plurality of positions, Since the thrust acting on the entire mover becomes large, there is an advantage that it is possible to provide a linear electromagnetic solenoid with high output and low noise.

[0037] Moreover, by the maximum point of the thrust that acts on the plunger coincides with the maximum point and the auxiliary member thrust acting from the magnetic pole piece to the movable member, to increase the maximum value of the thrust that acts on the plunger Therefore, there is an advantage that the operation is suitable for an application requiring a large thrust in a short time.

According to the fourth aspect of the present invention, at least one of the pole piece, the auxiliary member, and the front end portion of the movable element body located on the front side when the movable element moves with the excitation of the coil,
In the case where an inclined portion is formed so that the distance between the magnetic pole piece or the auxiliary member and the mover becomes wider toward the front, the relationship between the movement of the mover and the thrust is set variously by adjusting the inclination angle of the inclined portion. There is an advantage that it becomes possible to do.

According to the fifth aspect of the present invention, in the case where the slanted portion is shorter than the magnetic pole piece or the auxiliary member in the moving direction of the mover, when the mover is moved to the desired position, the opposite force is applied to the mover. There is an advantage that a large thrust can be obtained without acting. According to the sixth aspect of the present invention, the rear end of the magnetic pole piece located on the rear side when the mover moves along with the excitation of the coil and the mover when the maximum thrust force acts on the mover due to the excitation of the coil. If the size of the mover is set so that it is flush with the rear end face, the mover of the minimum size will not be acted on by a force in the direction opposite to the direction in which the mover is moved. Therefore, there is an advantage that a small and lightweight linear electromagnetic solenoid can be provided.

According to the seventh aspect of the invention, from the rear end of the magnetic pole piece located on the rear side when the mover moves along with the excitation of the coil when the maximum thrust force acts on the mover due to the excitation of the coil. Also, as the rear end of the mover extends backward,
In the case where the size of the mover is set, a sufficiently long mover is used, which has an advantage that a force in the direction opposite to the thrust does not act on the mover.

According to the eighth aspect of the invention, in the case where at least one end of the mover is provided with the connecting member for connecting to the load to be controlled, there is an advantage that the connection with the load becomes easy. According to the invention of claim 9 , in which the yoke is formed by connecting the yoke body magnetically coupled to the coil and the magnetic pole member including the magnetic pole piece, the shapes of the coil, the yoke and the magnetic pole piece are different. Even if the shape is complicated, there is an advantage that processing and assembling becomes relatively easy.

According to the tenth aspect of the present invention, in the case where the yoke is formed to surround the coil, the pole pieces are extended inside, and the mover is inserted inside the yoke, the yoke surrounds the coil. Moreover, since the magnetic pole pieces and the mover are provided inside the yoke, there is an advantage that the leakage of magnetic flux is reduced and the magnetic efficiency is increased. According to the invention of claim 11 , in which the yoke is formed in a cylindrical shape surrounding the coil, the magnetic pole pieces are extended in the cylinder, and the mover is inserted in the cylinder, the yoke surrounds the coil and Since the pole pieces and the mover are provided in the cylinder of the yoke, there is an advantage that leakage of magnetic flux is reduced and magnetic efficiency is increased.

According to the twelfth aspect of the present invention, in the yoke having the ventilation holes penetrating in and out, the heat from the coil and the frictional heat generated as the mover moves are radiated from the ventilation holes. Therefore, there is an advantage that the heat countermeasure can be easily performed. According to the thirteenth aspect of the invention, in which the yoke and the mover are connected via a spring, it is possible to apply a restoring force to the mover by the spring, and there is no limitation in the direction of use. Has the advantage of expanding.

In the case where the spring is selected so that resonance does not occur in the vibration system including the spring as in the fourteenth aspect of the invention, resonance does not occur, so the reciprocating cycle of the mover is freely selected. Therefore, there is an advantage that it is suitable for an application involving a change in the reciprocating cycle of the mover. According to the fifteenth aspect of the invention, the spring is selected so that resonance occurs in the vibration system including the spring, and there is an advantage that the thrust of the mover can be increased by utilizing the resonance.

According to the sixteenth aspect of the present invention, in the case where the massaging treatment element is attached to at least one end surface of the mover, the massage effect can be obtained by bringing the treatment element into contact with the human body and reciprocating the mover. There is an advantage that can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing a basic configuration .

FIG. 2 is an operation explanatory diagram of the above.

FIG. 3 is a cross-sectional view showing the first embodiment .

FIG. 4 is a cross-sectional view showing a second embodiment .

FIG. 5 is a cross-sectional view showing a third embodiment .

FIG. 6 is an operation explanatory diagram of the above.

FIG. 7 is a cross-sectional view showing a fourth embodiment .

FIG. 8 is a cross-sectional view showing another example of the above.

FIG. 9 is a cross-sectional view showing a fifth embodiment .

FIG. 10 is a side view showing a mover used in the above.

FIG. 11 is a cross-sectional view showing a sixth embodiment .

12A and 12B show a basic configuration of Embodiment 7 , where FIG. 12A is a plan view and FIG. 12B is a sectional view.

FIG. 13 is a plan view showing a seventh embodiment .

FIG. 14 is a plan view showing an eighth embodiment .

FIG. 15 is a cross-sectional view showing Embodiment 9 .

FIG. 16 is a cross-sectional view showing an application example of the present invention.

FIG. 17 is a cross-sectional view showing an application example of the present invention.

FIG. 18 is a side view of the above.

FIG. 19 is a front view of the above.

FIG. 20 is a front view of the same housing with the housing opened.

FIG. 21 is a cross-sectional view showing a conventional example.

FIG. 22 is an explanatory diagram of an operation of the above.

[Explanation of symbols]

1 coil 2 York 3 mover 5a, 5b pole pieces 6a, 6b Auxiliary member 7 Connection member 8 springs 9 treatment child 13 Movable element body 14 Connected body 15 taper 16 Yoke body 17 vents

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hironori Iwamoto 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (56) Reference JP 59-29406 (JP, A) JP 50-85422 ( JP, A) JP 7-153623 (JP, A) JP 64-20603 (JP, A) JP 8-150188 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01F 7/16

Claims (16)

(57) [Claims] 1. A movable body comprising: a coil; a yoke that is magnetically coupled to both poles of the coil and has a part of a magnetic path open; and a mover that is linearly movable in a direction connecting between open ends of the magnetic path in the yoke. A child is formed by a magnetic body movable element body connected in the moving direction and a non-magnetic body coupling body interposed between adjacent movable element bodies, and both sides of the open end of the magnetic path in the yoke. Magnetic pole pieces extending along the moving direction of the mover are formed on the side of the movable piece, and between the magnetic pole pieces, there is a straddle between the side surfaces of the adjacent mover bodies at the final stop position of the mover due to the excitation of the coil. An auxiliary member made of a magnetic material is disposed at a position where the thrust force applied to the mover by the magnetic pole piece is maximized.
The position where it becomes large and the movable member is made by the auxiliary member.
Use the magnet so that the position where the thrust to be used becomes maximum matches.
The positional relationship among the pole piece, the auxiliary member, and the mover element body is set.
A linear electromagnetic solenoid characterized by being specified . 2. The linear electromagnetic solenoid according to claim 1, wherein the mover comprises two mover bodies . 3. The linear electromagnetic solenoid according to claim 1 , wherein the mover has a cylindrical shape . 4. The mover moves with the excitation of the coil.
The magnetic pole piece and the auxiliary portion located on the front side when moving
At least one of the material and the front end of the movable element body,
The distance between the movable element and the pole piece or the auxiliary member
The feature is that the inclined part is formed so as to widen
The claim according to any one of claims 1 to 3.
Of linear electromagnetic solenoid. 5. The inclination in the moving direction of the mover
The part is shorter than the pole piece or the auxiliary member.
The linear electromagnetic solenoid according to claim 4, which is a characteristic . 6. The mover is excited by exciting the coil.
When the maximum thrust is applied, the
Rear end of the pole piece located on the rear side when the pendulum moves
And the rear end surface of the mover are flush with each other.
The size of the child is set.
Mounted linear electromagnetic solenoid. 7. A rear end of the magnetic pole piece located on the rear side when the mover moves along with the excitation of the coil when the maximum thrust force acts on the mover due to the excitation of the coil.
Than the rear end of the mover extends rearward
The linear electromagnetic solenoid according to claim 1 , wherein the mover has a dimension set therein. 8. A controlled object is provided on at least one end of the mover.
The linear electromagnetic solenoid according to claim 1, further comprising a connecting member that is connected to a load that becomes 9. The yoke is magnetically coupled to the coil.
Formed by combining the yoke body and the pole member with the pole pieces.
Linear electromagnetic solenoid according to claim 1, characterized in that it is made. 10. The yoke has a shape surrounding the coil.
The magnetic pole piece is formed inside and extends,
The linear electromagnetic solenoid according to claim 1, wherein the child is inserted inside the yoke . 11. The cylindrical shape in which the yoke surrounds the coil.
And the pole piece is extended in the cylinder.
The moving element is inserted in the cylinder.
The described linear electromagnetic solenoid. 12. A ventilation hole penetrating in and out of the yoke.
It is formed, The claim 10 or claim characterized by the above-mentioned.
Item 10. The linear electromagnetic solenoid according to Item 11 . 13. A yoke is provided between the yoke and the mover.
The linear electromagnetic solenoid according to claim 1, wherein the linear electromagnetic solenoid is connected to each other . 14. No resonance occurs in the vibration system including the spring.
Contract characterized in that the spring is selected so that
The linear electromagnetic solenoid according to claim 13 . 15. A resonance occurs in a vibration system including the spring.
The spring is selected so that
Item 13. The linear electromagnetic solenoid according to Item 13 . 16. A masser is provided on at least one end surface of a mover.
Contractor characterized by having a massager for
Linear electromagnetic solenoids of Motomeko 1 wherein.