JP2008055333A - Push-down head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a push-down head which is to be attached to a dispenser B having a stem 11 erected in such a way that an operator pushes down the head with the stem 11 in an upward-force state and allows smooth operation, with sliding parts minimized, and easy pushing down owing to good liquid cutting performance like conventional heads. <P>SOLUTION: A forward force is applied with an annular spring section 41 extended backward in an integrated way, and a valve member 12b forming a passage running from a through hole h of the bottom of the valve chamber R to a spraying outlet 31 in the upper part of the head body 12a is disposed. A connection cylinder 50 engaged in the stem is extended from the through hole h into the valve chamber R in vertically movable way. While the through hole is intercepted from the outside, the outer peripheral edge of an annular elastic wall 52 extended from the outer periphery of a connection cylinder 50 is connected with the body of the connection cylinder 50 in such a way as to be vertically movable with respect to the body of the connection cylinder 50. A conversion mechanism which converts the vertical movement of the valve member into a horizontal movement on pushing down of the body is arranged between the valve member and the connection cylinder for opening of the spraying outlet 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pressing head, and more particularly, it constitutes a part of a dispenser, and the dispenser that is mounted has good liquid drainage after ejection, there is no clogging in the pressing head, and it is easy to push down when ejecting liquid Further, the present invention relates to a pressing head that is easy to handle.

  As a dispenser, a fitting cap is fitted to the mouth and neck of the container body 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 in the upward biased state of the mounting cap. Are known. Further, as a pressing head for these dispensers, a mounting cylinder member provided with a sliding cylinder communicating with the inside of the stem, and a valve chamber having an outlet at the tip above the cylinder cylinder fitted to the outer periphery of the sliding cylinder A valve body that is provided so as to be able to be pressed down with respect to the mounting cylinder member, a valve member that closes the ejection port in a forward-biased state, and that defines a flow path from the inside of the cylinder cylinder to the ejection port, and a valve member And a specially-configured eaves member that is linked to the valve and opened by pushing down the head has been proposed. (For example, see Patent Document 1)

A dispenser equipped with such a pressing head can stably eject liquid at all times, has good liquid drainage, has a good sealing property at the ejection port, can be easily pushed down, and is stable for long-term use. It is an excellent one that can eject the liquid.
JP 2002-326044 A

  A dispenser provided with such a pressing head exhibits the above-mentioned specific effects, but it slides with a sliding cylinder and cylinder cylinder that slide in the vertical direction, or with a skirt portion of the valve member that slides in the front-rear direction. Since the moving surface or the saddle member whose upper part swings in the front-rear direction and lower part moves together, it slides on the sliding part between the sliding cylinder and the cylinder cylinder and the sliding part on the skirt part of the valve member. A force is likely to be applied in a direction different from the moving direction, and as a result, there is a risk of causing a sliding failure and hindering the smooth operation of each member. For this reason, silicon oil or the like is applied to the sliding surface to improve it, but inconveniences such as an increase in material costs and an application process occur.

  The present invention is a further improvement of the above-mentioned special-type pressing head, which can operate a smooth member, eliminate the step of applying a lubricant, and always stably eject liquid and run out of liquid. The present invention proposes a pressing head capable of exhibiting effects such as good quality, good sealing at the jet nozzle, easy depression of the head, and 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. Things can be adopted.

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

  The main body is attached to the stem via a connecting cylinder member, and is formed of a synthetic resin or the like. The main body is provided with a valve chamber having an opening at the front end. As its basic form, it has a cylindrical shape with a lower end opening formed by extending the top wall from the upper edge of the peripheral wall. For example, a jet port member is fitted to define the inside of the horizontal cylinder as a valve chamber, and a communication hole for communicating with the communication cylinder member is formed on the lower surface of the horizontal cylinder.

  The valve member is made of a flexible and elastic material such as an elastomer. Alternatively, the necessary parts, mainly the annular spring part and the spout fitting part where sealability is required, should be made of a flexible and elastic material, and the other as a synthetic resin generally used in this type of dispenser. Integrate and form. As a specific shape, an annular spring portion is extended at the rear end portion of the horizontal rod-shaped body portion, the rear end portion is fixed in the valve chamber, the body portion is urged forward, and the valve is formed at the front end portion of the body portion. The outlet at the front end of the chamber is closed so that it can be opened and closed. If necessary, in addition to the annular spring portion, a coil spring may be interposed at the rear end portion to strengthen the forward biasing force. The annular spring portion is, for example, an annular shape that spreads backward like a trumpet mouth from the rear end portion of the trunk portion of the valve member, or a shape that spreads annularly in a stepped manner, and biases the trunk portion forward The rear end is liquid-tightly fixed to the peripheral portion of the valve chamber.

  The connecting cylinder member is fitted and fixed to the upper end of the stem, and the inside of the stem and the valve chamber communicate with each other so that the connecting cylinder and the main body can move up and down, and the communication hole at the bottom of the valve chamber and the outside And shuts off the valve chamber from the outside. Also in this case, it is formed of a flexible and elastic material such as an elastomer or the like, or a necessary portion, mainly an annular elastic wall portion, is made of a flexible and elastic material, and the other is made of synthetic resin to integrate them. It is formed. Structurally, the lower end portion of the connecting cylinder protruding from the communication hole so that it can move up and down from the communication hole is fitted and fixed to the upper end of the stem, and the peripheral edge of the annular elastic wall extending from the outer periphery of the communication cylinder below the communication hole The portion is connected to the inner periphery of the main body peripheral wall and the lower surface of the horizontal cylinder surrounding the communication hole. However, an area and shape capable of elastic deformation that allow vertical movement of a predetermined width of the connecting cylinder with respect to the main body are required, and examples thereof include a dish-like shape, but are not limited thereto.

  The present invention includes a conversion mechanism that converts the vertical movement of the valve member into a horizontal movement when the main body is pushed down. Specifically, at least one of the valve member or connecting cylinder member is provided with an inclined surface, and the other is provided with an inclined surface or a projecting portion, an edge, or the like that slides on the inclined surface, and the valve member is moved backward by sliding of both. Let When the inclined surface is provided on the valve member, a downward inclined surface inclined forward is used, and when the inclined surface is provided on the connecting cylinder member, an upward inclined surface inclined forward is used. The position of the inclined surface provided in the valve member can be formed in the guide recess formed in the valve member body or on both sides, one side, etc., and when provided on the connecting cylinder member, it can be provided on the top of the connecting cylinder. Corresponding inclined surfaces, protrusions, edges and the like can be provided at the corresponding positions with the inclined surfaces.

  As a specific example, the rear surface of the guide recess opened in the lower surface of the body of the valve member is an inclined surface, while the upper surface of the connecting cylinder is provided with an inclined surface of the same inclination angle, and the inside of the guide recess is relatively moved while sliding both of them. Configure to be able to ascend. In addition, a pair of sliding plates are erected on both sides of the valve member body from the upper surface of the connecting cylinder member, and an upwardly inclined surface that tilts forward is provided on the top of the slide plate, while a forward stepped portion is formed on the valve member body. Each inclined surface is configured such that the lower edge of the forward stepped portion slides. Further, a sliding plate with an inclined surface similar to that of the connecting cylinder member is erected, and a projecting portion projecting laterally from the valve member body is slid on the inclined surface.

  The first means is configured as follows. That is, it is a pressing head mounted on a stem 11 standing upright so as to be able to be pushed in an upward biased state, and is integrally extended rearward with a main body 12a provided with a valve chamber R having an opening 31 at the front end. A valve member 12b that urges forward by an annular spring portion 41 to close the jet port 31 so as to be openable and closable, and that defines a flow path from the communication hole h provided in the bottom of the valve chamber R to the jet port 31; The lower end portion of the connecting cylinder 50 that protrudes from the communication hole h is fitted to the stem 11, and the outer peripheral edge of the annular elastic wall 52 extending from the outer periphery of the connecting cylinder 50 below the communication hole h is connected to the communication hole h. A connecting cylinder member 12c connected to the main body 12a, which allows the connecting cylinder 50 to be moved up and down with respect to the main body 12a, and converts the vertical movement of the valve member 12b into a horizontal movement when the main body 12a is depressed. A mechanism is provided between the valve member 12b and the connecting cylinder member 12c so that the jet port 31 is opened. .

The second means is configured as follows. That is, in the first means, as the conversion mechanism, the guide recess 43 formed in the downward first inclined surface f ₁ tilting the rear surface forward is provided on the lower surface of the valve member 12b with the lower end opened, vertically and slidably fitted a connecting cylindrical member 12c upper end portion to the second inclined surface f ₂ in the guide recess 43 formed in the top portion to slide first inclined plane f _1.

The third means was configured as follows. That is, in the first means, as the conversion mechanism, a central portion in the front-rear direction of the valve member 12b is formed in the small outer diameter portion 40a, and a forward stepped portion 44 is provided at the rear end of the small outer diameter portion 40a. a pair of sliding plate 55 which the second inclined surface f ₂ upward with the top of tilting the contact barrel 50 to erect and forward Shosoto diameter portion 40a on both sides on the provided to each second inclined surface f ₂ The lower edge of the forward stepped portion 44 is configured to slide down.

  The fourth means is configured as follows. That is, in any one of the first to third means, the coil spring s is interposed at the rear portion of the valve member 12b.

  The fifth means is configured as follows. That is, in any one of the first to fourth means, the annular spring part 41 part and the front end outer surface part of the valve member 12b are formed of a flexible and elastic material, The annular elastic wall 52 portion of the connecting cylinder member 12c was formed of a flexible and elastic material.

  The sixth means is configured as follows. That is, in any one of the first to fifth means, the pressing force of the main body 12a against the stem 11 is configured to be smaller than the pressing force of the stem itself.

  As described above, the pressing head according to the present invention has sufficient liquid-tightness and smooth sliding such as the sliding part between the sliding cylinder and the cylinder cylinder and the sliding part between the skirt part and the sliding surface as in the prior art. Therefore, the valve member 12b can be moved back and forth more smoothly, and it is possible to reliably prevent inconveniences such as the jet port 31 being open and not closing. In addition, the liquid breaks off after the liquid is ejected, there is no risk of clogging or solidification in the head, and it can be easily ejected without being hardened even though the ejection port is closed. it can. Moreover, since it can be used irrespective of the form of the dispenser, etc., it is excellent in versatility and can be applied to many types of dispensers. In addition, the number of members can be reduced as much as possible, and there is a merit of cost reduction, and at the same time, the assembling can be simplified.

As the conversion mechanism, a rear face provided with openings the lower guide recesses 43 formed in the first inclined surface f ₁ of the downwardly tilted forward to the valve member 12b lower surface, the second inclined sliding on the first inclined surface f ₁ If the surface has been formed on top fitted vertically slidably connecting cylindrical member 12c upper end in the guide recess 43, the sliding center portion between the first inclined face f ₁ second inclined plane Since the contact area can be increased, there is an advantage that stable vertical movement is possible.

As a conversion mechanism, the central portion in the front-rear direction of the valve member 12b is formed in the small outer diameter portion 40a, and a forward stepped portion 44 is provided at the rear end of the small outer diameter portion 40a. And a pair of sliding plates 55 having a second inclined surface f ₂ facing upward and tilting forward, and the lower edge of the forward stepped portion 44 slides down on each second inclined surface f _2. as when configured, the frictional force is small both sliding of the part contact area is very small and the second inclined surface f ₂ and the valve member 12b can be easily. In addition, since the small outer diameter portion 40a moves back and forth between both sliding plates 55, it is corrected even if the forward and backward movement of the body portion 40 due to the annular spring portion 41 causes a deviation from the axis. Secure straight forward and backward movement.

  When the coil spring s is interposed in the rear portion of the valve member 12b, there is an advantage that even if the forward biasing force of the annular spring portion 41 is insufficient, it can be assisted and a smooth operation can be performed.

  The annular spring portion 41 portion and the front end outer surface portion of the valve member 12b are formed of a flexible and elastic material, and the annular elastic wall 52 portion of the connecting cylinder member 12c is formed of a flexible and elastic material. In some cases, sufficient functionality can be exhibited by effectively using a flexible and elastic material such as an elastomer that is generally more expensive than a synthetic resin used for this type of head, such as polypropylene.

  If the pressure resistance of the main body 12a against the stem 11 is set to be smaller than the pressure resistance of the stem itself, it is possible to prevent liquid clogging after further liquid ejection, to prevent clogging and solidification in the head. Even though the outlet is blocked, the push-down can be easily carried out without being hardened.

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

  1 and 2 show a liquid ejection container, and the liquid ejection container 1 is composed of a container body A and a dispenser B. The container A is made of synthetic resin with the mouth and neck 3 standing from the body 2. The dispenser B is fitted to the container body A by fitting the mounting cap 10 to the neck 3, and the stem 11 protrudes above the mounting cap 10 so as to be able to be pushed upward. The pressing head 12 is fitted. A discharge valve 13 is provided in the upper part of the stem 11.

  The pressing head 12 in the present invention includes a main body 12a, a valve member 12b, and a connecting cylinder member 12c.

Body 12a includes a casing 12a _1, constitutes in the spout member 12a _2, the casing 12a ₁ is wall 20 upper edge than the top wall 21 to form a closed top cylindrical lower end opening formed by extending, A horizontal tube 22 having a front opening at the front portion of the peripheral wall 20 is integrally extended rearward. Further, a circular communication hole h is formed on the lower surface of the horizontal tube 22 in the front-rear direction, and the communication tube h is shortened downward from the periphery. The cylinder 23 is suspended. A protrusion 24 for locking the connecting cylinder member 12c is provided at a predetermined position on the inner periphery of the peripheral wall 20. The spout member 12a ₂ is fitted to the tip of the horizontal cylinder 22 and is defined in the valve chamber R inside the casing 12a ₁ . The spout member 12a ₂ has a front end projecting from the front end of the horizontal tube 22 tapered to open a spout 31 at the front end, and a plurality of ribs 30 in the circumferential direction projecting from the front part of the inner surface.

The valve member 12b is formed of silicon rubber, has a horizontal bar-shaped body portion 40 whose front end is tapered, and an annular spring portion 41 is integrally extended rearward from the rear end edge of the body portion. The annular spring part 41 has a lateral skirt shape and is configured to expand backward in a stepped manner. A fitting cylinder part 42 extending to the rear edge part is closely fitted to the rear end part of the inner periphery of the valve chamber R so that the body part 40 is moved forward. The tip of the body 40 is tightly fitted to the jet port 31 so that the jet port 31 is closed so that it can be opened and closed. A flow path from the communication hole h to the ejection port 31 is defined. Also, a guide recess 43 having a lower first inclined surface f ₁ that opens downward at the lower end of the middle portion 40 of the body portion 40 of the valve member 12b and tilts forward is provided. The guide recess 43 in the illustrated example is configured as a through hole reaching the upper end.

In the connecting cylinder member 12c, the lower end portion of the connecting cylinder 50 protruding from the communication hole h is fitted to the stem 11. The connecting cylinder 50 is formed with a large diameter at the lower portion and a small diameter at the upper portion, and the upper end portion of the internal communication passage 51 that connects the inside of the stem 11 and the inside of the valve chamber R is opened forward. The rear part of the top is formed as a second inclined surface f ₂ having the same inclination angle as the first inclined surface f ₁ . Further, an annular elastic wall 52 whose outer peripheral portion is curved and raised from the outer periphery of the connecting cylinder 50 below the communication hole h is extended, and an annular engaging portion 53 connected to the outer peripheral edge of the annular elastic wall 52 is provided at the lower surface position of the horizontal cylinder 22. The valve chamber R is liquid-tightly closed by fitting fluid-tightly to the inner periphery of the peripheral wall 20. The annular engagement portion 53 climbs over and engages with the upper surface of the protrusion 24 to prevent it from coming out downward.

The first inclined surface f ₁ of the valve member 12b urged forward by the annular spring portion 41 is supported by the second inclined surface f ₂ of the connecting cylinder member 12c, and the peripheral wall 20 portion is supported by the annular elastic wall 52. The main body 12a is maintained at the highest position with respect to the connecting cylinder member 12c. Further, when the first inclined surface f ₁ slides down on the second inclined surface f ₂ by pushing down the main body 12a, the valve member 12b moves backward against the forward biasing force of the annular spring portion 41. The jet outlet 31 is configured to open.

The pressing head 12 is configured such that the pressing force of the main body 12a against the stem 11 is smaller than the pressing force of the stem itself. In order to configure in this way, basically the annular spring portion 41 for biasing the valve member 12b forward rather than the elastic force of the elastic material for biasing the stem 11 of the dispenser B to be mounted upward. Sum of the elastic force of the coil spring s, the elastic force of the coil spring s, the frictional force between the first inclined surface f ₁ and the second inclined surface f ₂ and the force necessary for elastic deformation of the annular elastic wall 52 Should be selected smaller.

When the pressing head 12 configured as described above is pushed down from the state shown in FIG. 2A, the pressing force of the stem 11 itself is larger than the pressing force of the main body 12a against the stem 11, so that the first stem 11 is lowered. 1 (see line (1)), the first inclined surface f ₁ slides down the second inclined surface f ₂ while elastically deforming the annular elastic wall 52, and the main body 12a descends with respect to the connecting cylinder member 12c (see FIG. Line (2)). At this time, as shown in FIG. 2B, the valve member 12b moves backward against the elastic force of the annular spring portion 41, and the jet port 31 is opened. Next, as shown in FIG. 2 (c), the stem 11 is lowered (see the line (3)) and the pressing head 12 is also lowered (see the line (4)), and the liquid in the dispenser B is lowered by the lowering of the stem. From the inside of the stem 11, it is ejected from the ejection port 31 through the communication passage 51 and the valve chamber R to the outside.

Next, when the pressing of the pressing head 12 is released, the main body 12a is raised by the upward biasing force of the stem first. At this time, for example, the stem 11 is raised before the hand pressing the upper surface of the main body 12a is released, and the ejection port 31 is kept open. Therefore, at this time, the inside of the valve chamber R is in a negative pressure state. Then, the hand can scope release the, as valve member 12b and the connecting cylindrical member first inclined surface f ₁ by the elastic restoring force of the annular spring 41 and annular elastic wall 52 slides increases the second inclined surface f ₂ above 12c moves relatively, raises the main body 12a with respect to the connecting cylinder member 12c, closes the jet port 31 at the front end of the valve member 12b, and returns to the original state.

  FIG. 3 shows another example. In this example, the configuration of the valve member 12b and the connecting cylinder member 12c in the example of FIG. 1 is changed. In this example, the valve member 12b is formed by forming a middle portion in the front-rear direction of the body portion 40 at the small outer diameter portion 40a, and forming an annular forward stepped portion 44 at the rear end portion of the small outer diameter portion 40a. A cylindrical fitting hole 45 is bored forward from the rear surface of the body portion 40. In addition, a fitting cylinder 25 is projected from the peripheral wall 20 portion of the rear end portion of the horizontal cylinder 22 of the main body 12a, and the fitting cylinder portion 42 of the valve member 12b is closely fitted between the fitting cylinder 25 and the horizontal cylinder 22. I am letting. Further, the annular spring portion 41 is provided by interposing a coil spring s having a rear end portion fitted around the rod-like protrusion 26 protruding forward from the center of the fitting cylinder 25 and a front end portion fitted in the fitting hole 45. The forward urging force is made stronger.

In addition, the connecting cylinder member 12c is fitted with a vertical protrusion 27 projecting from the lower surface of the horizontal cylinder 22 of the main body peripheral wall 20 with an engaging groove 54 provided vertically at a predetermined position on the outer surface of the annular engaging portion 53. The direction of the member 12c is specified, and the connecting cylinder member 12c is prevented from rotating with respect to the main body 12a. The annular engaging portion 53 has an outer peripheral surface fitted on the inner periphery of the peripheral wall 20 immediately below the horizontal cylinder 22 and is fixed between the locking wall 28 and the peripheral wall 20 that are suspended from the lower surface of the horizontal cylinder 22. Further, the connecting cylinder 50 has a horizontal upper end surface, the upper end surface opens the upper end of the communication path 51, and a pair of sliding plates 55 are integrally provided on both sides of the upper end opening of the communication path 51. . Each slide plate 55 is provided with a second inclined surface f ₂ of the upwardly tilted forward on the upper end rear, are composed as both side lower edge of the forward stepped portion 44 of the valve member 12b slides down, respectively.

FIG. 5 shows still another example. In the example of FIG. 3, the valve member 12b is formed of two members, and the connecting cylinder member 12c is formed of three members. The valve member 12b is integrally formed as a valve member 12b having the same shape as that shown in FIG. 3 by forming a first member 12b ₁ made of silicon rubber and a second member 12b ₂ made of polypropylene by a molding method such as insert molding. is doing.

The first member 12b ₁ is formed by a fitting cylinder part 42, an annular spring part 41, and a body part constituting part 46 constituting a part of the body part 40. The body part 46 consists of a cylindrical part 46a having a cylindrical front surface extending forward from the front end edge of the annular spring part 41, and the center of the body part 40 from the front surface of the cylindrical part 46a to the tip. The rod-shaped part 46b and the dome-shaped part 46c constituting the outer surface of the front end of the body part 40 are configured. The second member 12b ₂ forms a body 40 together with the body component 46.

Further, connecting cylindrical member 12c is formed of a silicone rubber, a first member 12c ₁ that constitutes the annular elastic wall 52 portion, a second member 12c which is formed of polypropylene, constitute a contact cylinder 50 and the sliding plate 55 part ₂ and a third member 12c ₃ formed of polypropylene and forming an annular engagement portion 53 portion are integrally formed by insert molding. In both the example of FIG. 3 and the example of FIG. 5, the liquid ejecting action is substantially the same as in the example of FIG. 1 except that the valve member 12b is biased more reliably forward by the coil spring s. It is the same.

It is a longitudinal cross-sectional view of the dispenser using this invention pressing head. (Example 1) It is explanatory drawing explaining an effect | action of this invention pressing head. (Example 1) It is a longitudinal cross-sectional view of this invention pressing head. (Example 2) It is a perspective view of the connection cylinder member in this invention. (Example 2) It is a longitudinal cross-sectional view of this invention pressing head. (Example 3)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Liquid ejection container A ... Container body 2 ... Torso part, 3 ... Mouth neck part B ... Dispenser
10 ... Installation cap, 11 ... Stem, 13 ... Discharge valve
12 ... Pressing head
12a… Body
12a ₁ … casing
20 ... peripheral wall, 21 ... top wall, 22 ... horizontal tube, 23 ... short tube, 24 ... ridge, 25 ... fitting tube,
26 ... Rod-like projection, 27 ... Vertical projection, 28 ... Locking wall, h ₁ ... Communication hole, R ... Valve chamber,
p ... Flow path
12a ₂ … outlet member
30 ... ribs, 31 ... spout
12b ... Valve member (12b ₁ ... 1st member, 12b ₂ ... 2nd member)
40 ... trunk part, 40a ... small outer diameter part, 41 ... annular spring part, 42 ... fitting cylinder part,
43 ... Guide recess, 44 ... Forward facing step, 45 ... Mating hole, 46 ... Body part,
46a ... cylindrical part, 46b ... rod-like part, 46c ... dome-like part, f ₁ ... first inclined surface 12c ... communication cylinder member (12c ₁ ... first member, 12c ₂ ... second member, 12c ₃ ... third member )
50 ... connecting cylindrical, 51 ... communicating passage, 52 ... annular elastic wall, 53 ... annular engagement portion, 54 ... engaging groove 55 ... slide plate, f ₂ ... second inclined surface, s ... coil spring

Claims (6)

  A pressing head mounted on a stem 11 standing upright so as to be able to be pushed in an upward biased state, a main body 12a provided with a valve chamber R having an opening 31 at the front end and an upper part thereof, and an annular spring integrally extending backward A valve member 12b that is urged forward by the portion 41 so as to close the ejection port 31 so that it can be opened and closed, and that defines a flow path from the communication hole h provided at the bottom of the valve chamber R to the ejection port 31; The lower end of the connecting cylinder 50 protruding from the upper end of h is fitted to the stem 11, and the outer peripheral edge of the annular elastic wall 52 extending from the outer periphery of the connecting cylinder 50 below the communication hole h is connected to the communication hole h and the outside. And a connecting cylinder member 12c connected to the main body 12a so that the connecting cylinder 50 can be moved up and down with respect to the main body 12a, and a conversion mechanism for converting the vertical movement of the valve member 12b into a horizontal movement when the main body 12a is depressed. It is provided between the valve member 12b and the connecting cylinder member 12c so that the jet port 31 is opened. Features a pressing head. Second sliding as the conversion mechanism, a rear face provided with openings the lower guide recesses 43 formed in the first inclined surface f ₁ of the downwardly tilted forward to the valve member 12b lower surface, the first inclined surface f _{1 2.} The pressing head according to claim 1, wherein an inclined surface f2 is formed at the top and the upper end of the connecting cylinder member 12c is fitted into the guide recess 43 so as to be slidable up and down. As the conversion mechanism, a central portion in the front-rear direction of the valve member 12b is formed in the small outer diameter portion 40a, a forward stepped portion 44 is provided at the rear end of the small outer diameter portion 40a, and the small outer diameter portion 40a is provided on the connecting cylinder 50. A pair of sliding plates 55 provided on the top with _second upward inclined surfaces f ₂ standing on both sides and tilting forward are provided, and the lower edge of the forward stepped portion 44 slides down on each second inclined surface f _2. The pressing head according to claim 1, which is configured as described above.   The pressing head according to any one of claims 1 to 3, wherein a coil spring s is interposed at a rear portion of the valve member 12b.   The annular spring portion 41 portion and the front end outer surface portion of the valve member 12b are formed of a flexible and elastic material, and the annular elastic wall 52 portion of the connecting cylinder member 12c is formed of a flexible and elastic material. The pressing head according to any one of claims 1 to 4.   6. The pressing head according to claim 1, wherein the pressing force of the main body 12a against the stem 11 is configured to be smaller than the pressing force of the stem itself.

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