JP4748590B2 - Pump pressing head - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a pump pressing head, and more particularly, the pump that is installed is good in running out of liquid after jetting, there is no clogging in the head, etc., and it is easy to push down when pumping liquid. Regarding the head.

  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 jet port in a forward biased state, and that defines a flow path from the inside of the cylinder to the jet port, and is connected to the valve member. A specially-configured 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 press-down head can always discharge liquid stably, has good liquid drainage, has excellent sealing performance at the jet outlet, and can easily push down the head. Is an excellent solution that can stably eject liquid.
JP 2002-326044 A

  Moreover, the liquid jet pump provided with such a pressing head exhibits the above-mentioned specific effect, but the head tends to be large and the height tends to be particularly high. Therefore, it is difficult to adapt to a pump that is required to be short and compact, and the overall design tends to be restricted.

  The present invention is a further improvement of the pressing head of the special form described above, and the mounted pump can be formed compactly, has less design restrictions, and is always stable in jetting of this type of pump. In addition, the present invention proposes an excellent pump pressing head capable of exhibiting effects such as good liquid breakage, good sealing at the jet outlet, easy depression of the head, and durability.

  The pressing head of the present invention is used by being fitted to the upper end of the pump stem. The type of pump to be installed can be adopted as long as it is configured so that the liquid in the pump is ejected from the stem by pushing down the stem, for example, a pump having a general pump structure including a cylinder and a piston, Or an aerosol type thing etc. are employable.

  The pressing head of the present invention includes a mounting cylinder member, a main body, a valve member, and a flange 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. An annular sliding piece is slidably fitted to the inner periphery of the cylinder cylinder of the main body. This sliding fitting piece protrudes from the upper part of the mounting cylinder fitted and fixed to the upper end of the outer periphery of the stem. Even if it is slightly protruding upward from the stem, it is the same as the upper end of the stem or the stem It may be a form that protrudes outward from the upper part of the mounting cylinder at a position below the upper end of the mounting cylinder. Further, the shape may be a taper shape extending upward, a so-called reverse skirt shape, or an annular protrusion. Furthermore, a supporting wall for locking the lower end of the flange member is provided from the lower outer periphery of the mounting cylinder. The shape of the support wall is not particularly limited as long as the lower end of the flange member can be locked. However, the outer peripheral edge portion may be configured as a guide edge portion that guides the inner periphery of the peripheral wall of the main body. As a specific configuration of the guide edge, the outer peripheral surface may be slightly spaced from the inner peripheral surface of the main body peripheral wall, and the outer peripheral edge may be formed in a cylindrical shape.

  The main body is provided with a valve chamber having an opening at the tip on a cylinder cylinder at the lower end, and incorporates a valve member and a flange member. Further, it is mounted to the stem so as to be able to be pushed down via a mounting cylinder member, and is formed of a synthetic resin or the like.

  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 or an elastomer.

  The flange member is made of synthetic resin or the like, and is pivotally mounted so that the valve member can be pulled out rearward when the main body is pushed down with respect to the mounting cylinder member. The upper end is connected to the rear end portion of the valve member, and the lower end portion Is brought into contact with and locked to the upper surface of the support wall of the mounting cylinder member, and the lower end portion is pushed up by the support wall when the main body is pushed down, and the valve member is pulled out.

  As a first means, a pressing head to be mounted on a pump in which the stem 7 is erected so as to be able to be pushed in an upward biased state, and an annular sliding piece 11 is attached from the upper portion of the mounting cylinder 10 fitted on the upper end of the outer periphery of the stem 7. A mounting cylinder member A which is provided with a flange-like support wall 12 extending outwardly from the lower part of the mounting cylinder 10 and a cylinder cylinder 23 which is fitted on the outer periphery of the annular sliding piece 11 so as to be slidably lowered. A valve chamber R having a jet port a opened at the tip is provided above, a main body B provided so as to be able to be pushed down with respect to the mounting cylinder member A, and the jet port a being closed in a forward biased state in the valve chamber R. In addition, the upper end is connected to the rear end portion of the valve member C that defines a flow path from the inside of the cylinder cylinder 23 to the ejection port a, and the lower end portion is in contact with the upper surface of the support wall 12 The valve member C is pulled backward when the main body B is pushed down against the mounting cylinder member A. The main body B is pivotally attached to the main body B so that the main body B can swing so that the pressing force of the main body B against the stem 7 is smaller than the pressing force of the stem 7 itself.

  As a second means, in the first means, the outer peripheral edge of the support wall 12 of the mounting cylinder member A is configured as a guide edge for guiding the inner periphery of the peripheral wall 20 of the main body B.

  As described above, the pressing head according to the present invention has the above-described configuration, so that the mounting cylinder member A hardly protrudes from the upper end of the stem 7 or does not protrude at all as compared with the conventional pressing head of this type. The height of the pressing head 1 can be lowered, and an overall compact liquid ejector can be obtained. In addition to the change in the mounting cylinder member, there is no significant change, for example, by slightly increasing the diameter of the cylinder cylinder 23, and an increase in manufacturing cost due to the structure change can be suppressed as much as possible. In addition, the conventional pump of this type exhibits the advantages such as good liquid drainage, good sealing of the jet outlet a, easy depression of the head, durability and the like.

  Further, when the outer peripheral edge of the support wall 12 of the mounting cylinder member A is configured as a guide edge for guiding the inner periphery of the peripheral wall 20 of the main body B, it is supported only by fitting the cylinder cylinder 23 and the annular sliding piece 11. This has the advantage that the main body B can be moved up and down more stably.

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

  In FIG. 1, reference numeral 1 denotes a pressing head according to the present invention, and the pressing head 1 constitutes an upper end portion of a liquid jet pump 3 attached to a container body 2. 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 mouth / neck portion 5, and at the upper end of the stem 7 projecting so as to be able to be pushed in an upward biased state above the mounting cap 6. 1 is fitted and the pressing head 1 is pushed down, so that the liquid in the cylinder 8 suspended into the container body is ejected from the ejection port a of the pressing head 1 through the stem 7.

  The pressing head 1 includes a mounting cylinder member A, a main body B, a valve member C, and a flange member D.

  The mounting cylinder member A has an annular sliding piece 11 protruding from the upper part of the mounting cylinder 10 fitted to the upper end of the outer periphery of the stem 7, and a flange-shaped support wall 12 extending outward from the lower part of the mounting cylinder 10. is doing. Further, a guide tube 13 is erected from the outer peripheral edge of the support wall 12. The annular sliding piece 11 has a so-called reverse skirt shape having a tapered cylindrical shape that expands upward, and the upper end edge protrudes slightly above the upper end of the stem 7. Further, at predetermined positions on both sides of the rear portion of the guide tube 13, a kerf 15 is provided for enabling the vertical movement of the flange shaft D, which will be described later, relative to the guide tube 13.

The main body B is composed of a casing B ₁ and a jet outlet member B ₂ . Casing B ₁ represents the circumferential wall 20 the upper edge than the top wall 21 forms a closed top cylindrical lower end opening formed by extending the, and integrally extending transverse tube 22 having an open front end to the peripheral wall 20 front to rear, further A cylinder cylinder 23 is suspended from the lower surface of the horizontal cylinder 22, and the cylinder cylinder 23 is fitted and attached to the outer periphery of the annular sliding piece 11 so as to be able to slide down. A rod-shaped protrusion 24 is suspended from the center of the lower surface of the horizontal cylinder 22 in the cylinder cylinder 23. The rod-like protrusions 24 are provided to prevent the inconvenience that the valve body 14 of the discharge valve is caught by the engaging ribs protruding in the circumferential direction on the inner peripheral upper end of the stem 7.

The horizontal cylinder 22 has a space at the rear where the upper part of the flange member D can be accommodated. A window hole is formed in the center of the rear wall, and a seal cylinder 25 is projected forward from the front of the rear wall in the vicinity. In the lower part, a communication port communicating with the inside of the cylinder cylinder 23 is provided. And by fitting the spout member B ₂ and more front. This spout member B ₂ has a spout a at the front end to form a valve chamber R together with the horizontal cylinder 22. The rear part is liquid-tightly fitted to the front part of the horizontal cylinder 22 and the front part is tapered. The diameter is reduced to a shape, and a spout a is opened at the tip. In addition, a plurality of ribs in the circumferential direction are provided inside.

  The valve member C has a horizontal bar shape, and the skirt-like portion extends rearward from the outer peripheral front-rear direction middle portion, and the outer peripheral edge of the reverse skirt-like portion turned back from the rear end edge of the skirt-like portion is formed on the inner periphery of the seal cylinder 25. It is slidably fitted. The front end of the horizontal cylinder 22 is biased forward by a coil spring 30 interposed between the front surface of the rear wall of the horizontal cylinder 22 and the branched portion of the skirt-like portion, and the tip is pressed against the jet outlet a to be closed. Further, the rear end is protruded from the window hole, and an annular recess 31 for engaging the flange member is provided in the protruding portion. Thereby, a flow path is formed from the cylinder cylinder 23 through the communication port to the jet outlet a through the horizontal cylinder 22.

  The eaves member D has a form as shown in FIG. 2, and extends a bifurcated inclined plate portion 41 having an upper end portion that extends forward from a lower end portion of the vertical plate portion 40 that is linked to the rear end portion of the valve member C. The lower end portion of the inclined plate portion 41 is brought into contact with and locked to the upper surfaces of the support walls 12 on both sides of the mounting cylinder 10. In this embodiment, the collar member D and the valve member C are linked by fitting the annular recess 31 of the valve member C into a notch 42 provided at the center of the upper end of the vertical plate 40. Further, pivot shafts 43 projecting on both sides of the refracting portion are fitted to bearings (not shown) on both sides of the casing peripheral wall 20 so as to be rotatable.

  The valve member C urged forward by the coil spring 30 always urges the associated portion of the upper portion of the vertical plate portion 40 forward, and when the main body B is pushed down, the support wall 12 of the mounting cylinder member A is inclined. By pushing up the portion 41, the collar member D is rotated, and the valve member C is pulled out backward against the forward biasing force of the coil spring 30.

  In the present invention, in such a pressing head, the pressing force of the main body B against the stem 7 is configured to be smaller than the pressing force of the stem itself. In order to configure in this way, basically the elastic force of the elastic material for urging the valve member C forward is more than the elastic force of the elastic material for urging the stem of the pump to be mounted upward. It is only necessary to select a smaller value, and other factors may be selected in consideration of the frictional force between the annular sliding piece and the cylinder cylinder, the frictional force when the saddle member swings, and the like.

  In the liquid ejection pump 3 configured as described above, when the pressing head 1 is pushed down from the state shown in FIG. 1, the stem 7 itself does not lower because the pressing force of the stem 7 itself is greater than the pressing force against the stem 7 of the main body B. The main body B is lowered with respect to the mounting cylinder member A. At this time, the lower end portion of the flange member D is pushed up on the upper surface of the support wall 12 of the mounting cylinder member A and pivots about the pivot shaft 43, and the upper end portion pivots rearward so that the valve member C is turned into a coil spring. It is made to move backward against the elasticity of 30 and the spout a is opened. Next, the stem 7 descends, and as the stem 7 descends, the liquid in the pump passes through the cylinder cylinder 23 from the stem 7 and is ejected from the ejection port a to the outside through the flow path.

  Next, when the pressing of the pressing head 1 is released, the pressing head 1 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 1 is released, and the ejection port a is kept open. Therefore, at this time, the inside of the horizontal cylinder 22 is in a negative pressure state. Next, there is room for releasing the hand, the valve member C moves forward by the elastic force of the coil spring 30 and closes the ejection port a, and accordingly, the main body B is moved upward with respect to the mounting cylinder member A by the flange member D. To return to the original state.

  FIG. 3 shows another example. In the example of FIG. 1, the skirt-shaped portion of the valve member is formed as a separate body, and the locking projection 32 is provided projecting at the intermediate portion in the front-rear direction. The valve member C is urged forward by interposing a coil spring 30 between the rear cylinder 22 and the rear wall of the horizontal cylinder 22. Others are the same as in the example of FIG.

It is a longitudinal cross-sectional view of this invention pressing head. Example 1 It is a perspective view of the eaves member which constitutes the press head of the present invention. Example 1 It is a longitudinal cross-sectional view of this invention pressing head. (Example 2)

Explanation of symbols

A ... Installation cylinder member, 10 ... Installation cylinder, 11 ... Annular sliding piece, 12 ... Support wall B ... Main body, 23 ... Cylinder cylinder C ... Valve member D ... Fence member R ... Valve chamber a ... Jet port

Claims (2)

A pressing head for mounting the stem 7 upright so that the stem 7 can be pushed in an upward biased state, with an annular sliding piece 11 protruding from the upper portion of the mounting cylinder 10 fitted to the upper end of the outer periphery of the stem 7 and mounted. A mounting cylinder member A formed by extending a flange-like support wall 12 outward from the lower part of the cylinder 10 and a cylinder cylinder 23 fitted to the outer periphery of the annular sliding piece 11 so as to be slidable and descendable are jetted at the tip. A valve body R having an outlet a is provided, a main body B provided so as to be able to be pushed down with respect to the mounting cylinder member A, a jet outlet a being closed in a forward biased state in the valve chamber R, and a cylinder cylinder 23 The upper end of the valve member C that defines a flow path from the inside to the outlet port a, the rear end of the valve member C is connected to the upper end of the valve member C, and the lower end is abutted and locked to the upper surface of the support wall 12, and When the main body B is pushed down with respect to the mounting cylinder member A, the valve member C can swing so as to be pulled out rearward. A pump pressing head comprising: a collar member D pivotally attached to the main body B, wherein the pressing resistance of the main body B against the stem 7 is smaller than the pressing resistance of the stem 7 itself. The pump pressing head according to claim 1, wherein the outer peripheral edge of the support wall 12 of the mounting cylinder member A is configured as a guide edge for guiding the inner periphery of the peripheral wall 20 of the main body B.

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