Jet head

Abstract

To propose a jet head capable of jetting a content in the same manner as in the past and excellent in recyclability.SOLUTION: A jet head 1 of the present invention includes: a joint 2 which moves together with a stem 56; a head 3 which is movably attached to the joint 2 in a direction along an axis O; and a shutoff pin 6 which moves between an advanced position where a jet port 5c is closed and a retracted position where the jet port 5c is opened, the head 3 has a rear side wall part 4f facing a rear end part of the shutoff pin 6, is provided with an extension part 4g extending toward either the rear wall part 4f or the rear end part, and extending toward the other of the rear wall part 4f or the rear end part, and is provided on the other of the rear side wall part 4f or the rear end part with a first elastic piece 6e that is bent inwardly by the extension part 4g and a second elastic piece 6f that is bent outwardly when the shutoff pin 6 moves to the retracted position.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an ejection head that is used by connecting it to the stem of a pump-equipped container, an aerosol container, or the like. [Background technology]

[0002] Conventionally, a spray head has been used that is connected to the stem of a container containing the contents and sprays the contents to the outside by pressing the stem. In a commonly used spray head, the spray outlet is kept open, so that the contents remaining in the spray head may solidify if the spray head is not used for a long period of time.

[0003] As a solution to such problems, a jet head as shown in Patent Document 1 is also known. In this jet head, a shutoff pin is disposed inside a head having a jet outlet. The shutoff pin can move between a forward position where the jet outlet is closed and a retracted position where the jet outlet is opened, and is biased forward by a coil spring. The shutoff pin is connected to the head via a moving mechanism such as a lever. With this jet head, when the head is pressed, the lever or the like retracts the shutoff pin from the forward position to open the jet outlet, and the pressed-down head also presses down the stem, so that the contents contained in the container are introduced from the stem into the head and are jetted out from the jet outlet. When the pressure on the head is released, the coil spring moves the shutoff pin forward to close the jet outlet. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4975560 Summary of the Invention [Problem to be solved by the invention]

[0005] However, although most of the components of this type of ejection head are made of synthetic resin, the coil spring is made of metal. Therefore, when it is discarded after use, it cannot be recycled as a resin product in this state. In addition, in general, in this type of ejection head, the components are firmly fixed to each other, for example by fitting, to prevent the components from coming off during normal use. Therefore, it is time-consuming to disassemble the ejection head and separate the coil spring from the other components.

[0006] The present invention is aimed at solving such problems, and aims to propose an ejection head that is capable of ejecting the contents in the same way as conventional heads, and that also has excellent recyclability. [Means for solving the problem]

[0007] The present invention relates to a joint having a connection part connected to a stem of a container and a communication passage through which the content ejected from the stem passes, the joint moving together with the stem; a head attached to the joint so as to be movable in a direction along the axis of the stem, the head having an internal passage communicating with the communication passage and an outlet for ejecting the contents introduced into the internal passage to the outside; a shutoff pin disposed inside the internal passage and movable between an advanced position for closing the nozzle and a retracted position for opening the nozzle by moving away from the nozzle; a moving mechanism that moves the shutoff pin from the forward position to the backward position when the head is pressed, The head has a rear side wall portion facing a rear end portion of the shutoff pin, an extension portion is provided on one of the rear side wall portion and the rear end portion, the extension portion extending toward the other of the rear side wall portion and the rear end portion; This is an ejection head in which the other of the rear side wall portion and the rear end portion is provided with a first elastic piece that bends inwardly and a second elastic piece that bends outwardly due to the extension portion when the shutoff pin moves to the retracted position.

[0008] It is preferable that the first elastic piece and the second elastic piece are provided adjacent to each other on the other of the rear side wall portion and the rear end portion.

[0009] It is preferable that a first inclined portion is provided at a tip end of the first elastic piece, the outer surface of which inclines inwardly from the base to the tip end of the first elastic piece.

[0010] It is preferable that a tip portion of the second elastic piece is provided with a second inclined portion, the inner surface of which inclines outward from the base of the second elastic piece toward the tip. Effect of the Invention

[0011] According to the ejection head of the present invention, when the head is pressed to move the shut-off pin from the forward position to the backward position, the first elastic piece is bent inward and the second elastic piece is bent outward by the extension, so that the shut-off pin can be returned to the forward position when the bent first elastic piece and second elastic piece are restored. In other words, the ejection head of the present invention can be used in the same way as a conventional one without using a metal coil spring, and can be recycled as a resin product without disassembling it when discarded. In addition, since the first elastic piece is bent in the opposite direction to the second elastic piece, a force that pinches the extension acts between the first elastic piece and the second elastic piece. Therefore, the ejection head can be returned more reliably. [Brief description of the drawings]

[0012] [Figure 1] 1 is a vertical cross-sectional view of an embodiment of a jet head according to the present invention attached to a pump-equipped container as viewed from the side, showing a state before a second elastic piece is deflected. FIG. [Diagram 2] 2 is a cross-sectional view (a cross-sectional view taken along line AA in FIG. 1) illustrating a state before a first elastic piece in the embodiment illustrated in FIG. 1 is bent. [Diagram 3] FIG. 2 is a front perspective view of the nozzle shown in FIG. 1. [Figure 4] FIG. 2 is a front perspective view of the shutoff pin shown in FIG. 1. [Diagram 5] FIG. 2 is a rear perspective view of the shut-off pin shown in FIG. 1. [Figure 6] 2 is a vertical cross-sectional view seen from the side, showing a state in which the head is pressed from the state shown in FIG. 1 and a second elastic piece is bent. [Figure 7] 8 is a cross-sectional view (a cross-sectional view taken along line BB in FIG. 6) showing a state in which the head is pressed from the state shown in FIG. 7 and the first elastic piece is bent. [Figure 8] 1 is a vertical cross-sectional view of an embodiment of the ejection head according to the present invention attached to an aerosol container as viewed from the side, showing the state before the second elastic piece is deflected. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the ejection head 1, which is one embodiment of the ejection head according to the present invention, will be described with reference to the drawings. In this specification and the like, the up-down direction is the direction along the illustrated axis O (the central axis of the stem 56 described later), with the side where the cylinder 53 is located being the "lower" side and the side where the head body 4 is located being the "upper" side. The radial direction is the direction perpendicular to the axis O in a plane perpendicular to the axis O, and the circumferential direction is the direction rotating around the axis O in this plane. The front side is the side where the ejection port 5c described later is provided (the left side in FIG. 1), and the rear side is the opposite side (the right side in FIG. 1). The left side and the right side are the left-right directions when viewed from the front side toward the rear side.

[0014] As shown in Figures 1 and 2, the jet head 1 is attached to a container (a pump-equipped container 50 in this embodiment) when used. The pump-equipped container 50 is composed of a container body 51 and a pump-type dispenser 52. Before describing the jet head 1 in detail, first, the members constituting the container body 51 and the pump-type dispenser 52 will be described.

[0015] The container body 51 is generally shaped like a bottle, and includes a cylindrical body 51a rising from a bottom (not shown), a shoulder 51b extending radially inward from the upper end of the body 51a, and a cylindrical mouth 51c extending upward from the inner edge of the shoulder 51b. A male thread 51d is provided on the outer circumferential surface of the mouth 51c. A storage space S1 for storing contents is defined and formed inside the container body 51.

[0016] 1, the pump type dispenser 52 includes a cylinder 53, a pipe 54, an internal member 55, a stem 56, a holder 57, a packing 58, and a cap 59. Although not shown, a check valve, a piston, an elastic body, etc. are arranged inside the cylinder 53. In this embodiment, each of the members constituting the pump type dispenser 52 is basically formed into a shape centered on the axis O.

[0017] The cylinder 53 includes a cylindrical wall portion 53a, a retaining wall 53b that is cylindrical and has a smaller diameter than the cylindrical wall portion 53a and is provided at the lower part of the cylindrical wall portion 53a, and a flange wall 53c that extends radially outward from the upper part of the cylindrical wall portion 53a.

[0018] The pipe 54 is hollow, and its upper end is inserted into the lower part of the cylindrical wall portion 53a and is fitted and held therein.

[0019] The internal member 55 is disposed inside the cylinder 53 and is a member that moves up and down relative to the cylinder 53. The internal member 55 includes a cylindrical connecting tube 55a.

[0020] The stem 56 is a cylindrical member and is configured so that the connecting tube 55a is inserted inside the stem 56 and is fitted and held therein.

[0021] The holder 57 is a cylindrical member that is inserted into the cylindrical wall portion 53a and is held therein by being fitted thereto. A stem 56 is inserted into the inside of the holder 57. The stem 56 is movable up and down relative to the holder 57, but cannot come out of the holder 57.

[0022] The packing 58 is in the shape of an annular plate, and is inserted into and fitted into the cylindrical wall portion 53a of the cylinder 53. When the pump-type dispenser 52 is attached to the container body 51, the packing 58 is sandwiched between the mouth portion 51c and the flange wall 53c. This prevents problems such as the contents spilling out of the mouth portion 51c when the container body 51 is turned over.

[0023] The cap 59 has a disk-shaped top wall 59a with a through hole in the center. A lower peripheral wall 59b extending downward and an outer peripheral wall 59c surrounding the lower peripheral wall 59b are provided on the lower surface of the top wall 59a. An upper peripheral wall 59d extending upward is provided on the upper surface of the top wall 59a. An internal thread 59e is provided on the inner peripheral surface of the lower peripheral wall 59b to be screwed into the external thread 51d provided on the outer peripheral surface of the mouth portion 51c, and the cap 59 can be attached to the container body 51 by screwing the external thread 51d into the internal thread 59e.

[0024] The check valve is configured to normally close the opening at the portion where the cylindrical wall portion 53a and the retaining wall 53b are connected, and to open this opening when the pressure inside the cylindrical wall portion 53a drops. The piston is annular, with the connecting cylinder 55a inserted into the inner through hole, and the outer circumferential surface of the piston being in slidable contact with the inner circumferential surface of the cylinder 53. The elastic body biases the stem 56 upward.

[0025] Next, the jet head 1 will be described in detail. The jet head 1 of this embodiment is composed of a joint 2, a head 3 (composed of a head body 4 and a nozzle 5), and a shut-off pin 6. Each member constituting the jet head 1 is formed of a hard synthetic resin (for example, polypropylene (PP), polybutylene terephthalate (PBT), polyacetal (POM) resin, etc.).

[0026] The joint 2 includes a cylindrical connecting portion 2a. The connecting portion 2a is inserted into the inside of the stem 56 and connected thereto. The connecting portion 2a in this embodiment is configured so that the outer peripheral surface of the connecting portion 2a is fitted and held by the inner peripheral surface of the stem 56, and the joint 2 moves together with the stem 56. An upper wall portion 2b extending radially outward is provided at the upper end of the connecting portion 2a, and a cylindrical peripheral wall portion 2c extending downward is provided at the outer edge of the upper wall portion 2b. An outward protrusion 2d that protrudes radially outward and engages with the cap 59 is provided on the outer peripheral surface of the peripheral wall portion 2c.

[0027] An upper cylindrical portion 2e is provided on the upper surface of the upper wall portion 2b, extending upward and with its upper end curved radially outward. A rod-shaped portion 2f is provided inside the upper cylindrical portion 2e and extending along the axis O. The lower end of the rod-shaped portion 2f is connected to the upper wall portion 2b by connecting pieces provided at intervals in the circumferential direction centered on the axis O. Here, the passages defined inside the connection portion 2a, the passages defined between the connecting pieces, and the passages defined between the upper cylindrical portion 2e and the rod-shaped portion 2f are collectively referred to as the communication passage T1. A joint inclined portion 2g is provided at the upper end of the rod-shaped portion 2f, which is inclined so as to reduce in diameter upward.

[0028] The head body 4 is a member that moves in a direction along the axis O relative to the joint 2. The head body 4 of this embodiment includes a cylindrical connecting tube portion 4a that surrounds the upper tube portion 2e. The upper tube portion 2e is in slidable contact with the inner peripheral surface of the connecting tube portion 4a. A partition wall portion 4b extending radially outward is provided at the upper end of the connecting tube portion 4a, and a head outer wall portion 4c having a lidded cylindrical shape is provided at the outer edge portion of the partition wall portion 4b. A mounting hole 4d is provided in front of the head outer wall portion 4c, penetrating the head outer wall portion 4c from the front to the rear. A positioning recess 4e is provided above the mounting hole 4d by cutting the head outer wall portion 4c from the front to the rear.

[0029] Here, the rear portion of the head outer wall portion 4c (the portion facing the mounting hole 4d across the axis O) is referred to as the rear wall portion 4f. A cylindrical extension portion 4g that protrudes from the rear toward the front is provided on the inner surface of the rear wall portion 4f. The outer peripheral surface at the tip of the extension portion 4g is inclined so as to reduce in diameter from the rear toward the front as shown in FIG. Hereinafter, this inclined portion is referred to as the head inclined portion 4h.

[0030] 1, the inner peripheral surface of the head outer wall portion 4c is recessed radially outward at a portion overlapping with the outward protrusion 2d, and an inward protrusion 4j protruding radially inward is provided below this recessed portion. With this configuration, the head main body 4 is movable relative to the joint 2 in a direction along the axis O, and is prevented from coming off from the joint 2 by the engagement of the outward protrusion 2d and the inward protrusion 4j.

[0031] As shown in Figs. 1 and 3, the nozzle 5 includes a nozzle base 5a that is inserted into the mounting hole 4d and held by the head body 4. The nozzle base 5a in this embodiment is shaped so that the front part is cylindrical, and the rear part is cut out at the bottom and semi-cylindrical at the top. A nozzle front part 5b is provided in front of the nozzle base 5a, which is composed of a disk-shaped part and a part whose diameter decreases from the rear to the front. A hole (spout 5c) that penetrates the nozzle front part 5b from the front to the rear is provided at the tip of the nozzle front part 5b. A convex part (positioning convex part 5d) is provided at the part where the nozzle base 5a and the nozzle front part 5b are connected. The positioning convex part 5d is a part that is inserted into the positioning recess 4e when the nozzle 5 is attached to the head body 4, and the nozzle 5 is held by the head body 4 in a state where it is positioned in the direction of circling the central axis of the nozzle 5.

[0032] Here, in a state in which the nozzle 5 is attached to the head body 4, a passage defined inside the head body 4 and the nozzle 5 is referred to as an internal passage T2. The internal passage T2 communicates with the communication passage T1 and the ejection port 5c.

[0033] Furthermore, the nozzle 5 is provided with a nozzle-side slide protrusion 5e extending in the front-rear direction on its inner circumferential surface as shown in Fig. 1. The nozzle-side slide protrusions 5e are provided at intervals in a direction circling the central axis of the nozzle 5, and a groove portion extending in the front-rear direction is provided between adjacent nozzle-side slide protrusions 5e.

[0034] The shutoff pin 6 is a member disposed in the internal passage T2 and moves in the front-rear direction relative to the nozzle 5 attached to the head body 4. The shutoff pin 6 of this embodiment has a cylindrical pin body 6a as shown in Figs. 4 and 5. The pin body 6a has a hole penetrating the pin body 6a in the up-down direction as shown in Fig. 1, and the lower inner circumferential surface of this hole is inclined from the bottom to the top. Hereinafter, this inclined portion is referred to as the pin inclined portion 6b.

[0035] Furthermore, the shutoff pin 6 has a pin front portion 6c provided in front of the pin main body portion 6a. The pin front portion 6c is generally cylindrical, and its tip portion is shaped so that its diameter decreases from the rear to the front. A pin side slide protrusion 6d extending in the front-rear direction is provided at the upper portion of the pin front portion 6c. The pin side slide protrusion 6d is inserted into a groove portion provided between adjacent nozzle side slide protrusions 5e, and the shutoff pin 6 moves in the front-rear direction while being positioned in the direction of revolution around the central axis of the nozzle 5.

[0036] As shown in Figs. 1, 2 and 5, the shut-off pin 6 includes a first elastic piece 6e and a second elastic piece 6f that extend rearward from the rear end of the pin body 6a and have an arc-shaped cross section. In this embodiment, a pair of the first elastic pieces 6e are provided on the left and right sides of the shut-off pin 6, and a pair of the second elastic pieces 6f are provided above and below the shut-off pin 6. The first elastic piece 6e bends inward (bends toward the central axis of the shut-off pin 6), and the second elastic piece 6f bends outward (bends away from the central axis of the shut-off pin 6). The tip of the first elastic piece 6e is provided with a first inclined portion 6g whose outer surface is inclined inward from the front to the rear, and the tip of the second elastic piece 6f is provided with a second inclined portion 6h whose inner surface is inclined outward from the front to the rear.

[0037] When the jet head 1 made of such a member is attached to the stem 56 by inserting the connecting portion 2a into the inside of the stem 56 as shown in FIG. 1, the first elastic piece 6e and the second elastic piece 6f of the shut-off pin 6 contact the extension portion 4g. In detail, as shown in FIG. 2, the first inclined portion 6g provided on the outer surface of the tip of the first elastic piece 6e contacts the tip of the extension portion 4g, and as shown in FIG. 1, the second inclined portion 6h provided on the inner surface of the tip of the second elastic piece 6f contacts the head inclined portion 4h provided on the outer peripheral surface of the tip of the extension portion 4g. Note that the first elastic piece 6e and the second elastic piece 6f contact the extension portion 4g in a slightly bent state. Therefore, the shut-off pin 6 advances to the forward position shown in FIG. 1. At the forward position, the tip of the pin front portion 6c is inserted into the jet outlet 5c, so that the jet outlet 5c can be closed. At this time, the pin inclined portion 6b contacts the joint inclined portion 2g. In this embodiment, the "moving mechanism" in this specification corresponds to the pin inclined portion 6b and the joint inclined portion 2g.

[0038] When the head body 4 is pressed to eject the contents from the ejection port 5c, the shutoff pin 6 moves downward together with the head body 4 as shown in Figs. 6 and 7. That is, since the pin inclined portion 6b of the shutoff pin 6 is in contact with the joint inclined portion 2g, the shutoff pin 6 moves backward relative to the head body 4, and the ejection port 5c is opened. As the shutoff pin 6 moves backward, the first elastic piece 6e and the second elastic piece 6f move toward the extension portion 4g, and the first elastic piece 6e bends inward as shown in Fig. 7, and the second elastic piece 6f bends outward as shown in Fig. 6. In this embodiment, before the head body 4 is pressed, the first inclined portion 6g is in contact with the tip of the extension portion 4g as shown in Fig. 2, and when the first elastic piece 6e moves toward the extension portion 4g, a force that inclines inward acts on the first elastic piece 6e, so that the first elastic piece 6e can be smoothly bent inward. In this embodiment, as shown in FIG. 1, before the head body 4 is pressed, the second inclined portion 6h is in contact with the head inclined portion 4h, and when the second elastic piece 6f moves toward the extension portion 4g, a force acts on the second elastic piece 6f to tilt it outward, so that the second elastic piece 6f can be smoothly bent outward.

[0039] 6, when the head body 4 is pressed so that the lower end of the connecting tube portion 4a comes into contact with the base portion of the upper tube portion 2e, the joint 2 and stem 56 are pressed down together with the head body 4, causing a piston (not shown) to move downward relative to the cylinder 53, pressurizing the inside of the cylinder 53. As a result, the contents in the cylinder 53 pass through the inside of the stem 56, pass through the communication passage T1 and the internal passage T2, and are ejected to the outside world from the ejection port 5c.

[0040] Thereafter, the pressure on the head body 4 is released, and the piston rises together with the stem 56 due to the biasing force of the elastic body of the pump-type dispenser 52, reducing the pressure inside the cylinder 53. As a result, the check valve that had been closing the opening at the portion inside the cylinder 53 where the cylindrical wall portion 53a and the retaining wall 53b are connected opens this opening, so that the content contained in the container body 51 can be sucked into the cylinder 53 through the pipe 54.

[0041] Furthermore, when the pressure on the head body 4 is released, the shutoff pin 6, which had moved to the retracted position as shown in Fig. 6, moves to the advanced position as shown in Fig. 1 due to the restoring force of the bent first elastic piece 6e and second elastic piece 6f. As a result, the tip of the pin front part 6c is inserted into the nozzle 5c, making it possible to close the nozzle 5c again.

[0042] Thus, according to the ejection head 1 of this embodiment, the shut-off pin 6 can be restored after ejecting the contents without using a metal coil spring, and can be used in the same way as a conventional ejection head. In addition, since the first elastic piece 6e and the second elastic piece 6f are bent in opposite directions, a force that pinches the extension 4g also acts between the first elastic piece 6e and the second elastic piece 6f. Therefore, the head body 4 can be restored more reliably. In addition, when a flexible elastic piece such as the first elastic piece 6e or the second elastic piece 6f is repeatedly bent, it may become worn out and its restorability may decrease. However, in this embodiment, a force that pinches the extension 4g by the first elastic piece 6e and the second elastic piece 6f also acts, so that the head body 4 can be restored even if it is used repeatedly.

[0043] In this embodiment, the two first elastic pieces 6e and the two second elastic pieces 6f are arranged so that the first elastic pieces 6e and the second elastic pieces 6f are adjacent to each other. When the first elastic pieces 6e and the second elastic pieces 6f are arranged adjacent to each other in this manner, the force that pinches the extension 4g becomes larger, and the head body 4 can be returned more reliably.

[0044] The ejection head according to the present invention can also be used with an aerosol container, as shown in Fig. 8. The ejection head 1A shown in Fig. 8 is a partial modification of the above-mentioned ejection head 1, and includes a joint 2A and a head body 4A instead of the joint 2 and the head body 4. Note that parts that are basically common in configuration to the above-mentioned ejection head 1 are given the same reference numerals in the drawings, and detailed explanations are omitted.

[0045] The joint 2A includes a connecting portion 2h instead of the above-mentioned connecting portion 2a (as shown in FIG. 1, the connecting portion 2a is inserted into the inside of the stem 56). The connecting portion 2h has a larger diameter than a stem 61a described below and shown in FIG. 8, and is configured so that the stem 61a can be inserted therein.

[0046] The head main body 4A is provided with an outward flange portion 4k extending radially outward at the lower end of the head outer wall portion 4c described above.

[0047] The aerosol container 60 shown in FIG. 8 comprises a container body 61 in which contents and high-pressure gas are accommodated, an upper case 62, and a cover 63.

[0048] The container body 61 has a stem 61a at the center of the upper part. The stem 61a is biased upward, and when the stem 61a is pressed downward, the contents contained in the container body 61 are ejected from the stem 61a together with the high-pressure gas.

[0049] The upper case 62 is ring-shaped with an open bottom, and includes a holding portion 62a that is held by a mounting cup 61b of the container body 61. The inner edge of the holding portion 62a includes an inward flange portion 62b that extends upward and is positioned above the outward flange portion 4k. The inward flange portion 62b prevents the outward flange portion 4k from slipping out upward, so the ejection head 1A will not be unintentionally removed from the aerosol container 60. A support wall 62c that extends radially outward is provided on the outer edge of the holding portion 62a.

[0050] The cover 63 has a lidded cylindrical shape and, as shown in the figure, surrounds the jet head 1A and is held by the holding portion 62a.

[0051] Even in the ejection head 1A having such a configuration, before the head main body 4A is pressed as shown in Figure 8, the first elastic piece 6e (not shown in Figure 8) and the second elastic piece 6f are in contact with the extension portion 4g and the shut-off pin 6 moves to the forward position, so that the ejection port 5c can be closed.

[0052] When the cover 63 is removed and the head body 4A is pressed, the pin inclined portion 6b comes into contact with the joint inclined portion 2g, so that the shut-off pin 6 can be moved backward to open the nozzle 5c. The shut-off pin 6 also moves backward, so that the first elastic piece 6e is bent inward and the second elastic piece 6f is bent outward. Furthermore, the joint 2 and the stem 61a are pressed down together with the head body 4A, so that the contents contained in the container body 61 are ejected from the stem 61a together with the high-pressure gas, and then are ejected to the outside world from the nozzle 5c through the communication passage T1 and the internal passage T2.

[0053] Thereafter, when the pressure on the head body 4A is released, the shutoff pin 6 moves to the forward position shown in Fig. 8 due to the restoring force of the bent first elastic piece 6e and second elastic piece 6f. That is, in the jet head 1A of this embodiment as well, the shutoff pin 6 can be returned to the forward position to close the jet nozzle 5c without using a metal coil spring.

[0054] Although one embodiment of the present invention has been described above, the present invention is not limited to the specific embodiment, and various modifications and changes are possible within the scope of the spirit of the present invention described in the claims unless otherwise specifically limited in the above description. For example, the configuration of the above-mentioned embodiment can be appropriately added or deleted, and the configuration of one embodiment can be applied to another embodiment. Furthermore, the effects of the above-mentioned embodiment are merely examples of the effects resulting from the present invention, and do not mean that the effects of the present invention are limited to the above-mentioned effects.

[0055] For example, the number of the first elastic piece 6e and the second elastic piece 6f can be set arbitrarily, and may be singular, not limited to plural. The positions at which the first elastic piece 6e and the second elastic piece 6f are provided can also be changed as appropriate. For example, the first elastic piece 6e may be provided on the upper and lower sides of the shut-off pin 6, and the second elastic piece 6f may be provided on the left and right sides of the shut-off pin 6. Furthermore, the first elastic piece 6e and the second elastic piece 6f are not limited to those having an arc-shaped cross section as shown in the figure, and may be those having a rectangular cross section, for example. The extension portion 4g is not limited to those having a cylindrical shape, and may be those having a square tube shape, for example. The positions at which the first elastic piece 6e and the second elastic piece 6f are provided and the positions at which the extension portion 4g is provided may be interchanged, and the first elastic piece 6e and the second elastic piece 6f may be provided on the inner surface of the rear wall portion 4f, and the extension portion 4g may be provided at the rear end portion of the pin main body portion 6a.

[0056] Furthermore, with regard to the moving mechanism in this specification etc., in the above-described embodiment, it is configured with the pin inclined portion 6b and the joint inclined portion 2g, but it may also be configured so that when the head 3 is pressed using, for example, the lever shown in Patent Document 1, the shutoff pin 6 moves from the forward position to the backward position. [Explanation of symbols]

[0057] 1, 1A: Jet head 2, 2A: Joint 2a: Connection part 2b: Upper wall part 2c: Peripheral wall part 2d: Outward convex part 2e: Upper cylinder part 2f: Rod-shaped part 2g: Inclined joint 2h: Connection 3: Head 4, 4A: Head body 4a: Connection tube part 4b: Partition wall 4c: Head outer wall 4d: Mounting hole 4e: Positioning recess 4f: Rear wall 4g: Extension part 4h: Head inclination 4j: Inward protrusion 4k: Outward flange 5: Nozzle 5a: Nozzle base 5b: Nozzle front part 5c: spout 5d: Positioning protrusion 5e: Nozzle side slide protrusion 6:Shut-off pin 6a: Pin body 6b: Pin inclination 6c: Front part of pin 6d: Pin side slide protrusion 6e: First elastic piece 6f: Second elastic piece 6g: First slope 6h: Second slope 50: Pump-equipped container 51: Container body 51a: Torso 51b: Shoulder 51c: Mouth 51d: Male thread 52: Pump type discharger 53: Cylinder 53a: Cylinder wall part 53b: Retaining wall 53c: Flange wall 54: Pipe 55: Internal parts 55a: Connecting tube 56: Stem 57: Holder 58: Packing 59: Cap 59a: Ceiling wall 59b: Lower peripheral wall 59c: Outer wall 59d: Upper peripheral wall 59e: Female thread 60: Aerosol containers 61: Container body 61a:Stem 61b: Mounting cup 62: Upper case 62a: Holding part 62b: Inward flange section 62c: Support wall 63: Cover O: Axis line S1: Containment Space T1: Communication path T2: Internal passage

Claims

1. a joint having a connection part connected to a stem of a container and a communication passage through which the contents ejected from the stem pass, the joint moving together with the stem; a head attached to the joint so as to be movable in a direction along the axis of the stem, the head having an internal passage communicating with the communication passage and an outlet for ejecting the contents introduced into the internal passage to the outside; a shutoff pin disposed inside the internal passage and movable between an advanced position for closing the nozzle and a retracted position for opening the nozzle by moving away from the nozzle; a moving mechanism that moves the shutoff pin from the forward position to the backward position when the head is pressed, The head has a rear side wall portion facing a rear end portion of the shutoff pin, an extension portion is provided on one of the rear side wall portion and the rear end portion, the extension portion extending toward the other of the rear side wall portion and the rear end portion; An ejection head having a first elastic piece that bends inward and a second elastic piece that bends outward by the extension portion on the other of the rear side wall portion and the rear end portion when the shutoff pin moves to the retracted position.

2. The jet head according to claim 1 , wherein the first elastic piece and the second elastic piece are provided adjacent to each other on the other of the rear side wall portion and the rear end portion.

3. 2. The jet head according to claim 1, wherein a first inclined portion is provided at a tip end of the first elastic piece, the outer surface of which inclines inwardly from the base of the first elastic piece toward the tip end.

4. 2. The jet head according to claim 1, wherein a tip end of the second elastic piece is provided with a second inclined portion, the inner surface of which is inclined outward from the base of the second elastic piece toward the tip end.

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