JP4748589B2 - 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 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 and the cylinder cylinder of the main body are in fluid-tight communication, and is formed of synthetic resin, elastomer, or the like. An annular sliding piece is slidably fitted to the inner periphery of the cylinder cylinder of the main body. This annular sliding piece protrudes from the upper part of the mounting cylinder fitted and fixed to the outer peripheral upper end 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 projecting outward from the upper part of the mounting cylinder at a position below the upper end. Further, the shape may be a taper shape extending upward, a so-called reverse skirt shape, or an annular protrusion. Further, a bottom wall for raising the swing plate is provided from the lower outer periphery of the mounting cylinder. Although the shape of a bottom wall is not specifically limited, It is good to comprise the outer periphery part as a guide edge part which guides the surrounding wall inner periphery of a 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.

  A swing plate is erected on the rear portion of the bottom wall so as to be swingable in the front-rear direction. The swing plate is provided for the purpose of pulling the valve member backward when the main body is pushed down, and has an upper end connected to the rear end of the valve member. This connection may be a connection form in which the valve member can be pulled out rearward when the swinging plate is tilted backward, and it is sufficient that the swinging plate can be linked to the linear motion of the valve member. For example, a notch is provided vertically from the upper end of the swing plate, or a through hole is formed, and the rear end of the valve member is moved up and down in accordance with the inclination of the swing plate. A means for preventing slipping out by loosely fitting as much as possible, and making the annular forward stepped portion or locking protrusion provided at the rear end of the valve member abut on and engage with both sides of the notch portion and the rear surface of the rocking plate around the through hole Can be taken. The swing plate may be erected so as to be swingable in the front-rear direction via the elastic plate portion. With this configuration, when the swinging plate tilted backward is returned to its original state, it is performed without relying only on the front biasing force of an elastic member such as a coil spring. Become.

  The main body is formed of a synthetic resin or the like, has a cylinder tube at the lower end, and has a valve chamber having an opening at the tip on the cylinder tube, and incorporates a valve member. Further, the cylinder cylinder is slidably fitted to the outer periphery of the annular sliding piece, so that the stem is mounted to the stem so as to be pushed down via the mounting cylinder member.

  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.

  In the present invention, the main body is provided with a pressing sliding surface. The pressing sliding surface is configured such that when the main body is pushed down, the swinging plate is slid and pressed to tilt backward, and the valve member is pulled out rearward. As a result, the jet port is opened. The press sliding surface can adopt various forms as long as it exhibits the above-described action, for example, an inclined surface form or curved surface form that contacts the upper end of the swing plate and tilts backward, or swings. An inclined surface shape or a curved surface shape that abuts on a protruding portion protruding from the side surface of the plate and inclines backward can be employed.

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 is formed by projecting and extending a bottom wall 12 outward from the bottom of the mounting cylinder 10 and an oscillating plate 16 standing up and down from the rear of the bottom wall 12. And a valve chamber R having a spout a at the tip thereof and provided so as to be able to be pushed down with respect to the mounting cylinder member A. The main body B and the valve chamber R are closed in a forward-biased state in the valve chamber R, the rear end portion is connected to the upper end portion of the swing plate 16, and the inside of the cylinder cylinder 23 reaches the jet port a. and a valve member C composed defining a flow path, during depression of the body B, the sliding pressing surface s ₂ provided on the main body B The swing plate 16 is slid and pressed and tilted so that the valve member C is pulled out rearward, and the pressing force of the main body B against the stem 7 is configured to be smaller than the pressing force of the stem 7 itself. .

As a second means, in the first means, the sliding pressing surface s ₂ is in the form of an inclined surface inclined backward provided on the top rear surface of the main body B, and in front of the upper end of the swing plate 16. The edge was slidably contacted.

As a third means, in any one of the first means and the second means, a notch portion 17 is provided vertically in the center of the upper end portion of the rocking plate 16, and both side back surfaces of the notch portion 17 are provided. The valve body sliding surface s ₁ is in the form of an inclined surface inclined forward, and an annular forward step 31 provided at the rear end portion of the valve member C is slidably locked to each valve body sliding surface s _1. Then, the rear end portion of the valve member C is connected to the upper end portion of the swing plate 16.

  As described above, the pressing head of the present invention has the above-described configuration, so that the annular sliding piece 11 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 press head 1 can be lowered in height, and an overall compact liquid ejector can be obtained. Further, since the swing plate 16 provided integrally with the mounting cylinder member is used instead of the conventional flange member, the number of parts is reduced, and in addition to the change of the mounting cylinder member, for example, There is no significant change by slightly increasing the diameter of the cylinder cylinder 23, and an increase in manufacturing cost due to a structural 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.

When the sliding pressing surface s ₂ is in the form of an inclined surface inclined rearward provided on the back surface of the top of the main body B, the upper edge of the swing plate 16 is slidably brought into contact with the upper edge of the swing plate 16. Since a wide part of the moving plate 16 can be pressed, operations such as pulling out the valve member C and pushing up the main body B by the swing plate 16 can be performed more smoothly.

A notch 17 is provided vertically at the center of the upper end of the rocking plate 16 and the notch 17 has a valve body sliding surface s _{1 in the} form of an inclined surface in which both side back surfaces are inclined forward, and is provided at the rear end of the valve member C. When the provided annular step 31 is slidably engaged with each valve body sliding surface s ₁ and the rear end of the valve member C is connected to the upper end of the swing plate 16, There exists an advantage which can operate | move the connection part of the valve member C at the time of tilting back of the moving plate 16 more smoothly, and the effect becomes more remarkable in combination with a 2nd means.

  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 attached to the container body 2 by screwing a mounting cap 6 into the mouth / neck portion 5, and at the upper end of a stem 7 projecting so as to be able to be pushed upward 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, and a valve member C.

The mounting cylinder member A has an annular sliding piece 11 projecting from the upper part of the mounting cylinder 10 fitted to the upper end of the outer periphery of the stem 7, and an annular stepped portion outwardly from the lower part of the mounting cylinder 10 and in an intermediate portion in the inner and outer directions. A bottom wall 12 having a length is extended. Further, a guide tube 13 extends vertically from the outer peripheral edge of the bottom wall 12. A downward stepped portion 14 is provided at an intermediate portion in the vertical direction of the outer surface of the guide tube 13. Further, the swing plate 16 is erected integrally from the rear portion of the bottom wall 12 via the elastic plate portion 15. As shown in FIG. 2, the rocking plate 16 has a notch 17 vertically provided at the center of the upper end, and the rear surfaces of both sides of the notch 17 are formed on a valve body sliding surface s ₁ in the form of an inclined surface inclined forward. In addition, the annular recess described later of the valve member C is fitted into the notch 17. Further, a vertically long plate portion 13a is extended from the upper surfaces of both sides of the guide tube 13, and a pair of guide grooves 19 are vertically formed in the vertically long plate portion 13a and the guide tube 13 portion below the vertically long plate portion 13a. The guide groove 19 slidably fits sliding ridges (not shown) projecting on both sides of the inner surface of the casing peripheral wall, which will be described later, of the main body B, so that the mounting cylinder member A and the main body B are mutually stable. I'm trying to move up and down.

The main body B is composed of a casing B ₁ and a jet outlet member B ₂ . Casing B ₁ has a top-end cylindrical shape with a lower end opening formed by extending the top wall 21 from the upper end edge of the peripheral wall 20, and a horizontal cylinder 22 having a front opening at the front part of the peripheral wall 20 is integrally extended backward, Further, a cylinder cylinder 23 is suspended from the lower surface of the horizontal cylinder 22, and the inner periphery of the cylinder cylinder 23 is fitted to the outer periphery of the annular sliding piece 11 so as to be slidably lowered with respect to the stem 7. The horizontal cylinder 22 has a space in the rear portion where the swing plate 16 can be stored in a swingable manner, and a window hole is formed in the center of the rear wall so that the seal cylinder 24 extends forward from the front surface of the rear wall. And a communication port communicating with the inside of the cylinder cylinder 23 is provided at the lower part. A rod-like protrusion 25 is vertically provided at the center of the lower surface of the horizontal cylinder 22 in the cylinder cylinder 23. The rod-like protrusions 25 are provided to prevent the inconvenience that the valve body 18 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. Further, a sliding pressing surface s ₂ in the form of an inclined surface inclined backward is provided in a portion extending from the rear wall upper portion of the horizontal wall 22 to the top wall 21. The sliding pushing surface s ₂ forms a lower edge in contact with Horizontal the upper end portion of the swing plate 16 across the cutout portion 17. Further, a locking protrusion 26 is provided around a predetermined position on the inner peripheral lower portion of the peripheral wall 20, and the upward movement of the main body B relative to the mounting cylinder member A is restricted by engaging the downward stepped portion 14.

The spout member B ₂ is fitted to the front portion of the horizontal cylinder 22, and the spout port a is opened at the tip to form the valve chamber R together with the horizontal cylinder 22. At the same time, the front part is reduced in diameter to a taper 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 backward from the middle portion in the longitudinal direction of the outer periphery, and the outer peripheral edge of the reverse skirt-like portion folded back from the rear edge of the skirt-like portion is formed on the inner periphery of the seal cylinder 24. 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 projected from the window hole, an annular concave portion is provided in the projecting portion, and an annular forward stepped portion 31 is formed at the rear portion, and the forward stepped portion 31 is formed on the valve body sliding surface s of the swing plate 16. ₁ is abutted and locked. The valve member C defines a flow path from the cylinder cylinder 23 through the communication port to the jet outlet a through the horizontal cylinder 22.

The valve member C biased forward by the coil spring 30 always biases the connecting portion of the upper portion of the swing plate 16 forward, and when the main body B is pushed down, the sliding pressing surface s ₂ is moved to the swing plate 16. The swing plate 16 is pushed and rotated backward by sliding the upper edge of the upper end, and the valve member C is pulled backward against the forward biasing force of the coil spring 30. As a result, the jet outlet a is opened. is doing.

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. small may be selected, other, frictional force between the annular sliding piece 11 and the cylinder tube 23, the frictional force between the frictional force or the guide groove 19 and the sliding protrusion of the sliding pressing surface s ₁ and the oscillating plate 16 These may be selected in consideration of the above.

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 sliding pressing surface s ₂ slides and descends the upper end portion of the swinging plate 16 to rotate the swinging plate 16 backward. As a result, the valve member C resists the elastic force of the coil spring 30. Then, the jet port a opens. 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 connection port to the outside through the ejection port a through the flow path.

Next, when the pressing of the pressing head 1 is released, the main body B 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 main body B is released, and the ejection port a is kept open. Therefore, in this state, the inside of the horizontal cylinder 22 is in a negative pressure state. Next, there is room for releasing the hand, and the valve member C is pushed back by the elastic restoring force of the coil spring 30 and the elastic plate portion 15 to close the ejection port a. At that time, raised with respect to the body B is a stem 7 for upper portion front edge of the swing plate 16 presses downward while sliding on the sliding pressing surface s _2, it returns to the original state.

  FIG. 3 shows another example. In the example of FIG. 1, there is no bar-shaped protrusion, and the communication port is opened largely on the lower surface 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 mounting cylinder member which comprises this invention pressing head. Example 1 It is a longitudinal cross-sectional view of this invention pressing head. (Example 2)

Explanation of symbols

1 ... Pressing head 7 ... Stem
A: Mounting cylinder member, 10: Mounting cylinder, 11: Annular sliding piece, 12 ... Bottom wall, 15 ... Elastic plate part, 16 ... Swing plate 17 ... Notch part B ... Body, 23 ... Cylinder cylinder C ... Valve member , 31 ... Forward facing step R ... Valve chamber a ... Spout
s ₁ ... Valve element sliding surface
s ₂ … Sliding pressure surface

Claims (3)

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, in which a bottom wall 12 is extended outward from the bottom of the cylinder 10 and a rocking plate 16 is erected from the rear of the bottom wall 12 and can be swung back and forth, and an annular sliding piece 11. A main body B provided with a valve chamber R having a spout a at the tip thereof and capable of being pushed down with respect to the mounting cylinder member A above the cylinder cylinder 23 slidably fitted on the outer periphery, and a valve In the chamber R, the outlet a is closed in a forward biased state, the rear end is connected to the upper end of the swing plate 16, and a flow path from the cylinder cylinder 23 to the outlet a is defined. And a sliding pressing surface s ₂ provided on the main body B slides on the swing plate 16 when the main body B is pushed down. The pump member is constructed so that the valve member C is pulled backward by pushing the valve member C 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. head. 2. The sliding pressing surface s ₂ is in the form of an inclined surface inclined backward and provided on the back surface of the top of the main body B, and the front edge of the upper end of the swing plate 16 is slidably contacted. The pump pressing head. A notch 17 is provided vertically at the center of the upper end of the rocking plate 16 and the notch 17 has a valve body sliding surface s _{1 in the} form of an inclined surface in which both side back surfaces are inclined forward, and is provided at the rear end of the valve member C. The annular forward facing step portion 31 provided is slidably engaged with each valve body sliding surface s ₁ and the rear end portion of the valve member C is connected to the upper end portion of the swing plate 16. The pressing head of the pump according to claim 2.

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