JP4756549B2 - Pressing head - Google Patents

Description

  The present invention relates to a pressing head, and more particularly, it constitutes a part of a dispenser such as a pump, and the attached dispenser has good liquid drainage after liquid ejection, there is no clogging of liquid in the pressing head, etc. The present invention relates to a pressing head that can be pushed down easily and is easy to handle.

  As a liquid ejection pump, a fitting cap is fitted to the neck of the mouth and attached to the container body, and a pressing head is fitted to the upper end of the stem protruding so as to be able to be pushed upward above the fitting cap. It has been. In addition, as a pressing head for these pumps, a mounting cylinder member provided with a sliding cylinder communicating with the inside of the stem, and a valve chamber having an opening at the tip above the cylinder fitted to the outer periphery of the sliding cylinder A main body provided so as to be able to be pushed down with respect to the mounting cylinder member, a valve member that closes the ejection port in a forward biased state and defines a flow path from the inside of the cylinder to the ejection port, and is linked to the valve member A specially-designed eaves member that is opened by pushing down the head has been proposed. (For example, see Patent Document 1)

A liquid jet pump equipped with such a pressing head can always stably discharge liquid, has good liquid drainage, has excellent sealing performance at the outlet, and can be easily pushed down for long-term use. Is an excellent solution that can stably eject liquid.
JP 2002-326044 A

  Although the liquid ejection pump provided with such a pressing head exhibits the above-mentioned specific effect, it has a configuration in which a sliding cylinder communicating with the inside of the stem is erected above the top plate horizontally provided on the stem. There is a tendency for the head to become large, especially for the height. Therefore, for example, there is a tendency that it is difficult to perform an operation of grasping the container body and pressing the upper surface of the pressing head with an index finger or the like, and it is difficult to adapt to a pump that requires shortness and compactness, and the overall design is also There is a tendency to be constrained.

  The present invention is a further improvement of the pressing head of the special form described above. A dispenser in the form of a pump can be compactly formed, the handling operation is easy, the design is less restricted, and the structure is further simplified. Assembling is easy, and this type of conventional pump has a stable liquid ejection, a good liquid drainage, a good sealing of the ejection port, and the head can be pushed down easily. The present invention proposes an excellent pressing head capable of exhibiting effects such as excellent durability.

  The pressing head of the present invention is used in a dispenser having a stem projecting so as to be pressed down in an upwardly biased state from the upper end, and is used by being fitted to the upper end of the stem. The dispenser can be used as long as the stored liquid is ejected from the stem by pushing down the stem. For example, the dispenser has a general pump structure including a cylinder and a piston, or an aerosol type. Can be used.

  The pressing head according to the present invention includes a mounting cylinder member, a main body, and a valve member.

  The mounting cylinder member is fitted and fixed to the upper end of the stem so that the inside of the stem communicates with the inside of the cylinder cylinder of the main body, and is formed of a synthetic resin or the like. Specifically, an annular sliding piece projecting from the upper part of the mounting cylinder fitted to the outer periphery of the stem is slidably fitted to the inner circumference of the cylinder cylinder of the main body. The annular sliding piece protrudes with its upper end slightly protruding upward from the stem, or the same as the upper end of the stem or at a position below the upper end of the stem. The shape of the annular sliding piece may be a taper shape extending upward, a so-called reverse skirt shape, or an annular protrusion protruding outward.

  A supporting wall is extended from the outer peripheral lower part of the mounting cylinder, and a swinging plate capable of swinging in the front-rear direction is erected from the rear part of the supporting cylinder. The swing plate is connected to the valve member and plays the role of pulling the valve member rearward, and is swingably connected to the support wall via a thin hinge. Moreover, it is good to comprise the outer peripheral edge part of a support wall as a guide edge part which guides the internal peripheral wall of a main body. As a specific configuration of the guide edge portion, the outer peripheral surface thereof may be slightly spaced from the inner peripheral surface of the main body peripheral wall, and the outer peripheral edge portion may be formed in a cylindrical shape.

  The main body is provided with a cylinder cylinder in which an annular sliding piece is fitted on the outer periphery so as to be slidable downward. The main body is provided with a valve chamber with an opening at the tip above the cylinder cylinder, and a valve member is built in the valve chamber. ing. And it mounts | wears with a stem via a mounting cylinder member so that depression is possible, and it forms with a synthetic resin etc.

  The valve member closes the jet port in a forward biased state in the valve chamber and defines a flow path from the cylinder cylinder to the jet port, and is formed of a synthetic resin, an elastomer, or the like. The rear end portion of the valve member is connected to the upper end portion of the swing plate, and when the swing plate is tilted rearward, the valve member is pulled out rearward and mounted so that the tip outlet is opened.

  In the present invention, the rocking plate is tilted backward in conjunction with the depression of the main body, and the valve member is moved to open the jet port. As a specific means, a pair of elastic arms project forward from both sides of the upper part of the swing plate, and pressing surfaces that respectively press the distal ends of the elastic arms backward and inward when the main body is depressed. Therefore, the valve member is pulled out rearward. The side inward here means the side and inward meaning. As the form of the pressing surface, a first pressing surface tilted backward sliding on the front end of the elastic arm and a second pressing surface tilted inward on the side sliding on the tip side of the elastic arm A pair of pressing surfaces can be employed, and a configuration in which these pressing surfaces are provided on both sides in the upper part of the main body can be employed. Alternatively, it is possible to form each pressing surface with one surface instead of two surfaces, and a third pressing surface tilted rearward and sidewardly sliding on the outer corner of the tip of the elastic arm can be adopted. Can be used on both sides of the upper part in the main body. For example, if the third pressing surface on the left side is taken as an example, the upper outer corner at the tip of the elastic arm is the origin, the horizontal axis passing through the origin runs to the left and right, and the x axis runs up and down. If the axis is the y-axis and the axis that runs back and forth is the z-axis, the turning surface that rotates the horizontal upper surface around the x-axis by a predetermined angle of about 135 ° ± 20 ° is 45 ° horizontally around the origin A rotating surface rotated clockwise by a predetermined angle of about ± 20 ° can be employed. Each predetermined angle may be appropriately selected according to the purpose from the central angle of each region, but is not limited to the above width.

  The upper part of the swinging plate is pushed backward by pressing the elastic arm backward, and the upper part of the swinging plate is tilted backward, and the upper part of the swinging plate is also moved backward by pressing each elastic arm inward. It can be pushed and tilted further back. Therefore, even if the pressing width is the same, a larger tilt of the swinging plate is caused as compared with a case where the elastic arm is merely pressed backward.

The first means is configured as follows. In other words, it is a pressing head for mounting the stem 7 on a standing pump so that it can be pushed in an upward biased state, and an annular sliding piece 22 protrudes from the upper part of the mounting cylinder 21 fitted to the upper end of the outer periphery of the stem 7. A mounting cylinder member A _{1 formed} by extending a support wall 23 outward from the lower part of the mounting cylinder 21 and an oscillating plate 26 that can swing in the front-rear direction from the rear part of the support wall 23; sliding piece 22 in the cylinder tube 44 above which has sliding lowerable fitted to the outer periphery, provided with a valve chamber having an open spout 51 to the distal end, the body a which is provided to be depressed relative to the mounting cylinder member a _{1 2} and the outlet 51 is closed in the valve chamber in a forward-biased state, the rear end is connected to the upper end of the swing plate 26, and the flow path from the inside of the cylinder cylinder 44 to the outlet 51 is defined. and a valve member a ₃ consisting forms, as well as extending the pair of elastic arms 29 forward from both sides of the upper portion of the swing plate 26, the During depression of A _2, the leading end of the elastic arms 29, the pressing surface f to each pressed backward and side inwardly disposed, and configured as pull out the valve member A ₃ Te than backward, body A ₂ relative to the stem 7 The pushing drag force is configured to be smaller than the pushing drag force of the stem 7 itself.

The second means is configured as follows. That is, the In the first means, the each pressing surface f, the first pressing surface f ₁ which is inclined rearwardly to slide the tip front of the elastic arms 29, the distal end side of the elastic arms 29 And the second pressing surface f ₂ tilted inwardly on the sliding side.

  The third means was configured as follows. That is, in the first means, the pressing surface f is formed by a third pressing surface tilted rearward and laterally inwardly sliding on the top outer corner of each elastic arm 29.

Compared with this type of conventional pressing head, the pressing head according to the present invention can set the mounting cylinder member A ₁ in a state where it hardly protrudes from the upper end of the stem 7 or does not protrude at all. Due to the presence of the arm 29 and each pressing surface f, not only the backward movement of the swing plate 26 by simply pushing each elastic arm 29 backward, but also the rocking by pushing each elastic arm 29 simultaneously inward and laterally. rotation plate 26 can be further moved rearward, it is possible to move the valve member a ₃ to required width rearwardly with little depressed width of the body, as a result, overall able reduce the height of the pressing head a A compact liquid ejector can be obtained. Further, there is an advantage that the number of members can be reduced by omitting the saddle member as in the conventional product, and the assembly can be easily performed. In addition, the conventional pump of this type exhibits the advantages such as good liquid drainage, good sealing of the ejection port 51, easy depression of the head, durability, and the like.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a liquid ejection container, and the liquid ejection container 1 includes a container body 2 and a liquid ejection pump 3. The container body 2 is made of synthetic resin with the mouth and neck portion 5 standing up from the body portion 4. The liquid ejection pump 3 is fitted to the container body 2 by fitting the mounting cap 6 to the neck 5, and a stem 7 is projected above the mounting cap 6 so as to be able to be pushed upward. A pressing head A is fitted to the upper end. A discharge valve 8 is provided in the upper part of the stem 7.

Pressing head A is provided with a hollow mounting member A _1, a main body A _2, and the valve member A _3.

The mounting cylinder member A ₁ has an annular sliding piece 22 projecting upward from the upper end of the mounting cylinder 21 fitted on the upper outer periphery of the stem 7, and a flange-shaped support wall 23 outward from the lower part of the mounting cylinder 21. Further, a guide tube 24 is erected from the outer peripheral edge portion of the support wall 23. A notch portion 25 is provided from the rear portion of the support wall 23 to the rear portion of the guide tube 24, and the swing plate 26 is erected from the rear portion of the support wall 23 at the front edge of the notch portion 25. The swing plate 26 is formed with a thin hinge portion 27 at the lower end so that it can swing back and forth. The upper end is formed with a thin portion by recessing the rear surface, and the central portion of this thin portion. A kerf 28 that engages the rear end of the valve member A ₃ is formed in the upper part. Also, forward than its upper sides, the tip is integrally projects each elastic arm 29 to reach the front-rear direction intermediate portion of each side in the main body A _2. The annular sliding piece 22 has a so-called reverse skirt shape having a tapered cylindrical shape expanding upward, and an upper end edge is formed at the same level as the upper end of the stem 7. In addition, the guide cylinder 24 has a rear portion formed at a low level via a step portion, and a lower step portion 30 that contributes to prevention of slipping out is provided around the lower portion thereof, and a positioning step is provided at the front portion of the guide tube 24. The vertical groove 31 is vertically provided.

The main body A ₂ is composed of a casing A _2a and a jet outlet member A _2b . The casing A _2a has a cylindrical shape with a lower end opening formed by extending the top wall 42 from the upper end edge of the peripheral wall 41, and a horizontal cylinder 43 having a front end opened at the front of the peripheral wall 41 is integrally extended rearward. A cylinder cylinder 44 is suspended from the lower surface of the cylinder 43, and the cylinder cylinder 44 is fitted on the outer periphery of the annular sliding piece 22 so as to be slidable downward, and the peripheral wall 41 is vertically suspended on the outer periphery of the guide cylinder 24. Wearing. The horizontal cylinder 43 has a cylindrical shape with open front and rear ends, and has a space for accommodating the upper part of the swing plate 26 and both elastic arms described later on the rear and both sides. Also, the walls 43a after the horizontal tube 43 is drilled a window hole 45 for projecting the rear end portion of the valve member A _3, are projected a more tubular 46 walls 43a front after around the window hole 45 . In addition, a communication hole 47 through which the inside of the cylinder cylinder 44 and the inside of the horizontal cylinder 43 communicate is formed at the lower part of the horizontal cylinder 43 in the cylinder cylinder 44. Furthermore, projecting positioning projection 48 which vertically movably engaged with the vertical groove 31 in the peripheral wall 41 inner surface front, exit the body A ₂ engages with a downward step portion 30 in the lower inner peripheral wall 41 circumferential An engaging ridge 49 is provided to prevent this.

The upper sides of the body A _2, respectively provided pressing surface f. Each pressing surface f has a first pressing surface f ₁ tilted backward sliding on the front front portion of each elastic arm 29 and a second tilted inward on the side sliding on the tip side portion of each elastic arm 29. They are formed respectively by the pressing surface f _2.

The spout member A _2b is fitted from the front end of the horizontal cylinder 43 to form a valve chamber together with the horizontal cylinder 43, and the front end protruding from the front end of the horizontal cylinder 43 is tapered to a spout at the front end. 51 is opened, and the rear end portion is closely fitted to the outer periphery of the tube 46. In addition, a communication path that connects the communication hole 47 and the inside of the jet outlet member A _2b is formed at a corresponding position of the rear communication hole 47. The connecting path is composed of a belt-like recess 52 provided around the outer periphery of the cylindrical wall and through-holes 53 provided at four locations at equal intervals in the circumferential direction of the belt-like recess 52. In addition, a plurality of circumferential ribs 54 project from the inner front portion.

The valve member A ₃ has a horizontal bar shape, and an annular skirt portion 61 projecting diagonally forward from the rear front intermediate portion is fitted to the inner periphery of the jet outlet member A _2b behind each through hole 53 so as to be liquid-tightly slidable. I am letting. In addition, an annular recess 62 is formed at the rear end protruding rearward from the horizontal cylinder 43, and the annular recess 62 is engaged with the groove 28 of the swing plate 26 to connect the two. Further, the coil spring s interposed between the horizontal cylinder rear wall 43a and the annular skirt portion 61 is urged forward, and the tip is pressed against the ejection port 51 and closed. Then, to form a flow path to the ejection outlet 51 from the cylinder tube 44 through hole 47, from the street valve member A ₃ periphery contact path.

In the present invention, in such a pressing head, the pressing drag of the main body A ₂ against the stem 7 is configured to be smaller than the pressing drag of the stem itself. In order to configure in this way, basically the elasticity of the coil spring s for biasing the valve member A ₃ forward rather than the resilient force of the elastic material for biasing the stem of the pump to be mounted upward. may be selected smaller Hatsuryoku, other frictional force between the annular sliding piece 22 and the cylinder tube 44, the frictional force during sliding of the valve member a _3, the frictional force or the like of the respective pressing surfaces f and the elastic arms 29 These may be selected in consideration of

In the liquid jet pump 3 configured as described above, when the pressing head A is pushed down from the state of FIG. 1, the pressing resistance of the stem itself is larger than the pressing resistance against the stem 7 of the main body A _2. The main body A ₂ is lowered with respect to the mounting cylinder member A ₁ . At this time, each elastic arm 29 is pressed rearward by each first pressing surface f ₁ , and each elastic arm 29 is pressed laterally inward by each second pressing surface f _{2, so} that the elastic force of the coil spring s is obtained. anti to move the valve member a ₃ rearward, open spout 51. Next, the stem 7 descends, and as the stem 7 descends, the liquid in the pump 3 passes through the cylinder cylinder 44 from the stem 7 and is ejected from the ejection port 51 to the outside through the communication hole 47 through the flow path.

Next, when the pressing of the pressing head A is released, the pressing head A is raised by the upward biasing force of the stem 7 first. At this time, for example, the stem 7 is raised before the hand pressing the upper surface of the pressing head A is released, and the ejection port 51 is kept open. Therefore, at this time, the inside of the horizontal cylinder 43 is in a negative pressure state. Next, there is room for releasing the hand, and the valve member A ₃ moves forward by the elastic force of the coil spring s to close the ejection port 51, and accordingly, each elastic arm 29 is moved to each of the first pressing surface f ₁ and the second. for relatively lowering the pressing surface f _2, the body a ₂ is raised relative to the mounting cylinder member a _1, return to the original state.

It is a longitudinal cross-sectional view of this invention pressing head. Example 1 It is a schematic explanatory drawing explaining an effect | action of this invention pressing head. Example 1 It is a schematic explanatory drawing explaining an effect | action of this invention pressing head. Example 1 It is principal part explanatory drawing of the press surface part of this invention pressing head. Example 1

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Liquid ejection container 2 ... Container body 4 ... Torso part, 5 ... Mouth neck part 3 ... Liquid ejection pump 6 ... Mounting cap, 7 ... Stem, 8 ... Discharge valve A ... Pressing head
A ₁ … Installation cylinder member
21 ... Installation cylinder, 22 ... Annular slide piece, 23 ... Support wall, 24 ... Guide cylinder, 25 ... Notch
26 ... Swing plate, 27 ... Hinge part, 28 ... Cut groove, 29 ... Elastic arm, 30 ... Downward step part,
31 ... Vertical groove
A ₂ ... Body
A _2a … Casing
41 ... peripheral wall, 42 ... top wall, 43 ... horizontal tube, 44 ... cylinder tube, 45 ... window hole,
46 ... Cylinder, 47 ... Communication hole, 48 ... Positioning protrusion, 49 ... engaging protrusion, f ... pressing surface,
f ₁ ... first pressing surface, f ₂ ... second pressing surface
A _2b … outlet member
51 ... Jet, 52 ... Strip-shaped recess, 53 ... Through hole, 54 ... Rib
A ₃ … Valve member
61 ... skirt part, 62 ... annular recess, s ... coil spring

Claims (3)

A pressing head for mounting the stem 7 upright so that it can be pushed in an upward biased state, with an annular sliding piece 22 protruding from the upper part of the mounting cylinder 21 fitted to the upper end of the stem 7 and mounted. A mounting cylinder member A ₁ having a support wall 23 extending outwardly from the lower part of the cylinder 21 and an oscillating plate 26 that can swing in the front-rear direction from the rear part of the support wall 23, and an annular slide A cylinder body 44 fitted to the outer periphery of the piece 22 so as to be slidably lowered is provided with a valve chamber having an opening 51 at the tip, and a body A ₂ provided so as to be able to be pushed down with respect to the mounting cylinder member A ₁ ; In addition, the nozzle 51 is closed in the valve chamber in a forward-biased state, the rear end is connected to the upper end of the swing plate 26, and a flow path from the cylinder cylinder 44 to the nozzle 51 is defined. and a valve member a ₃ consisting Te, as well as extending the pair of elastic arms 29 forward from the upper sides of the rocking plate 26, the body a ₂ To time lowered, the distal ends of the resilient arms 29, the pressing surface f to each pressed backward and side inwardly disposed, and configured as pull out Te valve member A ₃ or more to the rear, depression of the body A ₂ relative to the stem 7 A pressing head characterized in that the drag is smaller than the pressing drag of the stem 7 itself. The said each pressing surface f, the first pressing surface f ₁ which is inclined rearwardly to slide the tip front of the elastic arms 29 and inclined to the side inwardly to slide the tip side of the elastic arms 29 pressing head according to claim 1, wherein obtained by forming respectively the second pressing surface f _2.   The pressing head according to claim 1, wherein the pressing surface f is formed by a third pressing surface tilted rearward and laterally inwardly sliding on the outer corner of the upper end of each elastic arm 29.

Images