Pump-type dispensing device

Abstract

In a pump-type discharger comprising a head body and an elastic member, we propose a technology that enables the elastic piece provided on the elastic member to exhibit the desired elastic force. [Solution] In the pump-type discharger 100, the cap 10 has a pressing wall 10d that protrudes toward the head, and the head has a head body 12 having a discharge port 12d and a connecting cylindrical portion 12a that is connected to a stem 7a and leads to the discharge port 12d, a base portion 13a that is held by the head body 12 and has a mounting hole 13b that is inserted into the connecting cylindrical portion 12a, an elastic piece 13c that extends from the base portion 13a toward the cap 10 and bends due to the pressing wall 10d when the head body 12 is advanced toward the cap 10, and an elastic member 13 having a protruding wall 13d that extends from the portion of the base portion 13a where the mounting hole 13b is provided in the opposite direction from the cap 10.

Description

Technical Field

[0001] The present invention relates to a pump-type discharger.

Background Art

[0002] As a pump-type discharger, there is known one including a cap attached to the mouth of a container, a pump driven by a stem that moves up and down (moves forward and backward) while being held at the mouth by the cap, and a head connected to the stem, and discharging the content liquid in the container from the discharge port of the head by moving the head toward the cap.

[0003] Inside such a pump-type discharger, as shown in Patent Document 1, a coil spring is provided to return the head moved toward the cap to its initial position. In such a pump-type discharger, although most members are made of synthetic resin, the coil spring is made of metal, so there is a problem that it cannot be recycled as a resin product in this state when it is discarded after use. Also, in this type of pump-type discharger, in order to avoid members coming off during normal use, the members are firmly fixed to each other, for example, by fitting. Therefore, it takes time to disassemble the pump-type discharger and separate the coil spring from other members.

[0004] In response to such problems, Patent Document 2 shows a pump-type discharger in which, instead of a coil spring, an elastic piece extending along the central axis of the stem is provided on the cap or the head. In the pump-type discharger of Patent Document 2, when the head is lowered toward the cap, the elastic piece is elastically deformed, and when the elastically deformed elastic piece is restored, the head can be raised in the same manner as in the prior art. Also, the pump-type discharger of Patent Document 2 does not require the operation of separating the coil spring at the time of disposal, and can be recycled as a resin product as it is, so it also has excellent recyclability.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2011-31950 [Patent Document 2] Japanese Patent Publication No. 2024-50382 [Overview of the project] [Problems that the invention aims to solve]

[0006] However, when an elastic piece is provided on the head, attempting to integrally provide the elastic piece on the head often results in a complex mold structure for forming the head. For this reason, it is being considered to construct the head with a head body connected to a stem and having an outlet, and an elastic member equipped with an elastic piece, and to attach the elastic member to the head body so that the elastic member is held in place by the head body.

[0007] Figure 4 shows a partially enlarged view of the portion of a pump-type discharger 200, which comprises a head body 212 and an elastic member 213, where the elastic member 213 is held by the head body 212. The head body 212 includes a connecting cylindrical portion 212a into which a stem 207a is inserted and fitted and held. A top portion 212b is provided at the top of the connecting cylindrical portion 212a. A nozzle 212c extending radially outward is provided at the top portion 212b, and a cylindrical outer peripheral wall 212e is provided at the outer edge of the top portion 212b. Reinforcing ribs 212f are provided on the inside of the outer peripheral wall 212e.

[0008] The elastic member 213 has a plate-shaped base portion 213a, and a circular through hole (mounting hole 213b) is provided in the center of the base portion 213a. The elastic member 213 also has an elastic piece 213c extending downward from the lower surface of the base portion 213a. When the head 212 is pressed downward, the elastic piece 213c comes into contact with a pressing wall (not shown) and elastically deforms in a direction away from the central axis O.

[0009] At this time, the base portion 213a to which the elastic piece 213c is connected is subjected to a downward bending force on the inner edge of the base portion 213a due to the elastic piece 213c bending radially outward. As a result, the base portion 213a may elastically deform downward as shown by the dashed line in Figure 4. In this case, the amount by which the elastic piece 213c bends radially outward decreases, and there was a risk that the expected elastic force could not be obtained from the elastic piece 213c.

[0010] In view of these points, the present invention aims to propose a technology that enables an elastic piece provided on an elastic member to exert the desired elastic force in a pump-type discharger comprising a head body and an elastic member. [Means for solving the problem]

[0011] The pump-type dispenser of the present invention comprises a cap attached to the mouth of a container that holds liquid contents, a pump driven by the movement of a stem held at the mouth by the cap, and a head having a discharge port for discharging liquid contents to the outside and connected to the stem, wherein the liquid contents in the container are discharged from the discharge port by moving the head along the central axis of the stem, the cap has a pressing wall protruding toward the head, the head has a head body having the discharge port and a connecting cylindrical portion connected to the stem and connected to the discharge port, a base portion having a mounting hole inserted into the connecting cylindrical portion and held by the head body, an elastic member having an elastic piece extending from the base portion toward the cap and bending due to the pressing wall when the head body is advanced toward the cap, and a protruding wall extending from the portion of the base portion where the mounting hole is provided in the opposite direction from the cap. [Effects of the Invention]

[0012] According to the pump-type discharger of the present invention, when the head is pressed and the elastic piece bends radially outward, the bending of the base is suppressed by the protruding wall, so that the elastic piece can bend radially outward as intended, and the desired elastic force can be obtained from the elastic piece. [Brief explanation of the drawing]

[0013] [Figure 1] This is a cross-sectional view from the side of one embodiment of a pump-type discharger according to the present invention, with the cover attached and the head in the upper limit (retraction limit) position. [Figure 2A] This is a cross-sectional view along line AA shown in Figure 1. [Figure 2B] This is a cross-sectional view along BB shown in Figure 1. [Figure 3] Figure 1 shows a cross-sectional side view of the pump-type discharger with the cover removed and the head in the lowest (forward) position. [Figure 4] This diagram shows a pump-type discharger without a protruding wall. [Modes for carrying out the invention]

[0014] Hereinafter, a pump-type discharger 100, which is one embodiment of the pump-type discharger according to the present invention, will be described with reference to the drawings. In this specification, the vertical direction is the direction along the central axis O shown in the figure (the central axis of the stem 7a described later), where the side where the pipe 4 is located is "down" and the side where the head body 12 is located is "up". In this specification, the movement of the head body 12 when it is pressed downward is described as the head body 12 moving forward, and the movement of the pressed head body 12 returning upward is described as the head body 12 moving backward. For this reason, in the following description, the vertical direction described above may be referred to as the front-back direction. The radial direction is the direction perpendicular to the central axis O in a plane perpendicular to the central axis O, and the circumferential direction is the direction of rotation around the central axis O in this plane.

[0015] The pump-type dispenser 100 of this embodiment is used by being attached to the mouth of a bottle-shaped container (not shown). The liquid contents to be dispensed by the pump-type dispenser 100 are, for example, cosmetics (such as lotions and toners), shampoos, body soaps, hand soaps, facial cleansers, etc.

[0016] As shown in Figures 1 and 3, the pump-type discharger 100 is composed of a cylinder 1, a valve member 2, a pipe 4, an internal member 5, a piston 6, a cylindrical member 7, a holder 8, a packing 9, a cap 10, a head body 12, an elastic member 13, and a cover 14. Here, the cylinder 1, valve member 2, internal member 5, piston 6, cylindrical member 7, and holder 8 are components that constitute the "pump" as defined herein, while the head body 12 and elastic member 13 are components that constitute the "head" as defined herein. Of the above components, the valve member 2, piston 6, and packing 9 are made of elastic, soft synthetic resin (e.g., polyethylene (LDPE, HDPE, foamed PE)), while the other components are made of hard synthetic resin (e.g., polypropylene (PP), polybutylene terephthalate (PBT), polyacetal (POM), polyketone (POK) resin, etc.). Each component constituting the pump-type discharger 100 is basically shaped around a central axis O. Figure 1 shows the head body 12 in the upper limit (retraction limit) position, and Figure 3 shows the head body 12 in the lower limit (advance limit) position.

[0017] The cylinder 1 has a disc-shaped bottom wall portion 1a with a central part protruding upward, a cylindrical cylindrical wall portion 1b rising from the outer edge of the bottom wall portion 1a, and a flange wall 1c extending radially outward from the upper part of the cylindrical wall portion 1b. A through hole (suction port 1d) is provided in the central part of the bottom wall portion 1a that protrudes upward. A cylindrical retaining cylinder 1e is provided on the lower surface of the bottom wall portion 1a, surrounding the suction port 1d and extending downward to hold the pipe 4. A through hole (vent port 1f) is provided in the cylindrical wall portion 1b.

[0018] The valve member 2 comprises a base portion 2a, a valve body portion 2b that covers the suction port 1d inside the base portion 2a and sits on the upper surface of the bottom wall portion 1a, and an elastically deformable connecting piece 2c that connects the base portion 2a and the valve body portion 2b. The valve member 2 functions as a check valve, and when the inside of the cylinder 1 becomes depressurized, the valve body portion 2b that was closing the suction port 1d separates from the bottom wall portion 1a, allowing the suction port 1d to open.

[0019] The base 2a forms a covered cylindrical shape in this embodiment and has an opening (not shown) through which the content liquid passing through the suction port 1d passes. The base 2a is fitted and held on the inner peripheral surface of the cylindrical wall portion 1b, whereby the valve member 2 is held within the cylinder 1.

[0020] The pipe 4 is hollow, and its upper end is inserted into and fitted and held by the holding cylinder 1e.

[0021] The internal member 5 is disposed inside the cylinder 1 and is a member that moves up and down with respect to the cylinder 1. The internal member 5 includes a cylindrical connecting cylinder 5a and a bottom portion 5b that closes the lower end of the connecting cylinder 5a and extends radially outward. Further, a hole (communication port 5c) penetrating the connecting cylinder 5a is provided, and an annular portion 5d is provided on the upper surface of the bottom portion 5b, which is located radially outside the connecting portion with the connecting cylinder 5a.

[0022] The piston 6 is inserted through the connecting cylinder 5a and disposed inside the cylinder 1. The piston 6 of this embodiment includes an annular base portion 6a. On the outer edge portion of the base portion 6a, outer sliding pieces 6b extending upward and downward from the base portion 6a are provided. The outer sliding pieces 6b are slidably and liquid-tightly abutted against the inner peripheral surface of the cylindrical wall portion 1b. And on the inner edge portion of the base portion 6a, inner sliding pieces 6c extending upward and downward from the base portion 6a are provided. The lower portion of the inner sliding piece 6c is liquid-tightly abutted against the annular portion 5d, and the upper portion of the inner sliding piece 6c is slidably and liquid-tightly abutted against the inner peripheral surface of an enlarged diameter portion 7b (to be described later) in the cylindrical member 7.

[0023] The cylindrical member 7 is a member that is generally cylindrical. The cylindrical member 7 includes a cylindrical stem 7a and an enlarged diameter portion 7b that is connected to the lower end of the stem 7a and has a larger diameter than the stem 7a. Since the connecting cylinder 5a is inserted into the stem 7a and the two are fitted together, the internal member 5 and the cylindrical member 7 move integrally with respect to the cylinder 1.

[0024] The holder 8 has a portion located radially outward from the stem 7a and a portion located radially outward from the enlarged diameter portion 7b, and includes a holder base 8a that is fitted and held on the inner circumferential surface of the cylindrical wall portion 1b. The upper end of the holder base 8a is provided with a flange 8b that extends radially outward. The holder 8 prevents the internal member 5, piston 6, and cylindrical member 7 from coming out of the cylinder 1.

[0025] The packing 9 is an annular plate shape and is inserted through the cylindrical wall portion 1b of the cylinder 1 and fitted and held in place therewith. When the pump-type dispenser 100 is attached to a container (not shown), the packing 9 is sandwiched between the mouth of the container and the flange wall 1c. This prevents problems such as the contents spilling out of the mouth when the container is tipped over.

[0026] The cap 10 is disc-shaped and has a top wall 10a with a through hole in the center. The outer edge of the top wall 10a is provided with a cylindrical lower peripheral wall 10b that extends downward. The upper part of the inner peripheral surface of the lower peripheral wall 10b bulges radially inward, allowing the flange wall 1c to be fitted and held, thereby holding the cylinder 1 in the cap 10. The inner peripheral surface of the cap 10 is also provided with a female threaded portion 10c that screws onto a male threaded portion provided at the mouth of the container, and the cap 10 can be attached to the container by screwing the male threaded portion and the female threaded portion 10c together.

[0027] The cap 10 also has a pressing wall 10d on the upper surface of the top wall 10a. The pressing wall 10d protrudes upward from the upper surface of the top wall 10a and has a dome-shaped form centered on the central axis O. A through hole is provided in the center of the pressing wall 10d through which the stem 7a passes.

[0028] Inside the pressing wall 10d, a back-side rib 10e is provided that extends along the central axis O. In this embodiment, a total of seven back-side ribs 10e are provided at equal intervals in the circumferential direction, as shown in Figure 2B. By providing the back-side ribs 10e, the rigidity of the pressing wall 10d can be increased, thereby suppressing downward and radially inward deflection of the pressing wall 10d.

[0029] The cap 10 also includes a cylindrical upper peripheral wall 10f that extends upward from the outer edge of the top wall 10a.

[0030] The head body 12 is cylindrical and includes a connecting cylindrical portion 12a into which a stem 7a is inserted and fitted and held. The upper part of the connecting cylindrical portion 12a is provided with a top portion 12b that extends horizontally, and the top portion 12b is provided with a nozzle 12c that is cylindrical, extends radially outward, and leads to the stem 7a. The tip of the nozzle 12c is provided with a discharge port 12d through which the liquid contents are discharged by a pump-type dispenser 100. Furthermore, the head body 12 has a cylindrical outer peripheral wall 12e that is smaller in diameter than the upper peripheral wall 10f and extends downward. As shown in Figure 1, when the head body 12 is moved to its upper limit, the lower end (tip) of the outer peripheral wall 12e is located below the upper end (tip) of the upper peripheral wall 10f, and the upper peripheral wall 10f and the outer peripheral wall 12e can cover the area around the pressing wall 10d. On the inner side of the outer peripheral wall 12e, reinforcing ribs 12f are provided, extending downward from the top portion 12b and connecting to the connecting cylindrical portion 12a and the outer peripheral wall 12e. In this embodiment, the lower surface of the reinforcing ribs 12f is formed in a stepped shape such that the side further from the central axis O is lower than the side closer to the central axis O. As shown in Figure 2A, a total of six reinforcing ribs 12f are provided, spaced apart in the circumferential direction. The outer peripheral surface of the connecting cylindrical portion 12a is provided with an engaging portion 12g, as shown in the partially enlarged view of Figure 1. In this embodiment, the engaging portion 12g protrudes radially outward from the outer peripheral surface of the connecting cylindrical portion 12a and has a convex shape.

[0031] The elastic member 13 has a plate-shaped base portion 13a. A circular through hole (mounting hole 13b) is provided in the center of the base portion 13a.

[0032] The elastic member 13 also includes elastic pieces 13c that extend downward from the lower surface of the base portion 13a toward the top wall 10a of the cap 10. In this embodiment, the elastic pieces 13c extend downward from the upper end (root) connected to the base portion 13a toward the central axis O, and the lower end (tip) extends toward the central axis O. As shown in Figure 2B, a total of six elastic pieces 13c are provided at equal intervals in the circumferential direction.

[0033] Furthermore, the elastic member 13 includes a cylindrical protruding wall 13d extending upward from the inner edge of the base portion 13a, where the mounting hole 13b is provided, in the opposite direction (upward) from the top wall 10a of the cap 10, and a cylindrical outer protruding wall 13e extending upward from the vicinity of the part where the root of the elastic piece 13c connects to the base portion 13a.

[0034] Furthermore, the elastic member 13 has an engaged portion 13f on its inner circumferential surface where the mounting hole 13b provided in the base portion 13a is located, as shown in the partially enlarged view of Figure 1. In this embodiment, the engaged portion 13f is formed in a concave shape by recessing the inner circumferential surface of the base portion 13a radially outward.

[0035] To attach such an elastic member 13 to the head body 12, the connecting cylindrical portion 12a is inserted into the mounting hole 13b, and the two are moved relative to each other until the upper surfaces of the protruding wall 13d and the outer protruding wall 13e contact the lower surface of the reinforcing rib 12f. As a result, the outer circumferential surface of the base portion 13a is supported by the inner circumferential surface of the outer circumferential wall 12e, the upper surface of the outer edge of the base portion 13a, and the upper surfaces of the protruding wall 13d and the outer protruding wall 13e are supported by the lower surface of the reinforcing rib 12f, and the inner circumferential surface of the base portion 13a and the inner circumferential surface of the protruding wall 13d are supported by the outer circumferential surface of the connecting cylindrical portion 12a. At this time, as shown in the partially enlarged view of Figure 1, the engaging portion 12g and the engaged portion 13f engage.

[0036] The cover 14 has a plate-shaped cover top wall 14a that extends horizontally. A cylindrical cover peripheral wall 14b that extends downward is provided at the outer edge of the cover top wall 14a. The inner circumferential surface at the lower end of the cover peripheral wall 14b is configured to fit detachably with the outer circumferential surface of the lower peripheral wall 10b, and when the cover 14 is attached to the head body 12 so as shown in Figure 1, the cover 14 is held in place by the cap 10.

[0037] In the pump-type discharger 100 composed of such components, the tip of the elastic member 13 extends away from the central axis O, as shown in Figure 1. That is, when attaching the head body 12 to which the elastic member 13 is attached to the stem 7a, if the elastic member 13 contacts the pressing wall 10d in a direction perpendicular to it, the elastic member 13 will not bend easily, requiring a strong force to attach the head body 12. However, in this embodiment, the tip of the elastic member 13 contacts the pressing wall 10d and is guided radially outward, so excessive force is not required to attach the head body 12.

[0038] Furthermore, in the pump-type discharger 100, as shown in Figure 1, before the head body 12 is pressed, the tip of the elastic piece 13c is in contact with the pressing wall 10d, causing the elastic piece 13c to bend slightly radially inward, and the head body 12 is moved to its upper limit (retraction limit). When the cover 14 is removed and the head body 12 is pressed from above to lower it (advancing the head body 12 toward the cap 10), the stem 7a is pushed down together with the head body 12 (the stem 7a advances toward the cap 10 along the central axis O). As the stem 7a is pushed down, the bottom 5b also descends via the connecting cylinder 5a, releasing the liquid-tight contact between the annular portion 5d and the lower part of the inner sliding piece 6c. When the head body 12 is pushed down further, the piston 6 descends together with the cylindrical member 7 and the internal member 5, pressurizing the inside of the cylinder 1. Therefore, the liquid inside cylinder 1 passes through the communication port 5c, the connecting cylinder 5a, the stem 7a, the connecting cylinder portion 12a, and the inside of the nozzle 12c, and is discharged to the outside from the discharge port 12d. When the head body 12 is pressed and the piston 6 is lowered below the vent port 1f, a container (not shown) communicates with the outside through the vent port 1f. As a result, even if the liquid inside the container decreases, the inside of the container does not become negatively pressurized, preventing the container from deforming and collapsing.

[0039] Furthermore, when the head body 12 is pressed down, the pressing wall 10d that contacts the elastic piece 13c applies a pressing force to the elastic piece 13c, causing the elastic piece 13c to bend radially outward as shown in Figure 3. At this time, the base portion 13a to which the elastic piece 13c is connected is subjected to a downward bending force due to the radially outward bending of the elastic piece 13c. On the other hand, the base portion 13a of this embodiment is equipped with a protruding wall 13d that extends upward, and even if the inner edge of the base portion 13a is subjected to a downward bending force, this protruding wall 13d contacts the connecting cylinder portion 12a, thereby suppressing the bending of the base portion 13a. In other words, if the base portion 13a bends, the amount by which the elastic piece 13c bends radially outward decreases, and in this case, the intended elastic force cannot be obtained from the elastic piece 13c. However, in this embodiment, the bending of the base portion 13a is suppressed, and the elastic piece 13c bends radially outward as intended, so the intended elastic force can be obtained from the elastic piece 13c. Furthermore, in this embodiment, as shown in the partially enlarged view of Figure 1, the engaging portion 12g and the engaged portion 13f are engaged, and deformation such as downward bending of the inner edge of the base portion 13a can be more reliably prevented, so the elastic force obtained from the elastic piece 13c is more reliably as intended.

[0040] The protruding wall 13d may be partially provided circumferentially with respect to the base portion 13a, but if a pressing force is applied to the head body 12 on the side where the protruding wall 13d is not provided, there is a risk that the base portion 13a will bend. On the other hand, if the protruding wall 13d is cylindrical as in this embodiment, bending of the base portion 13a can be reliably suppressed even if the pressing force is unevenly applied to the head body 12, and the elastic force can be reliably obtained from the elastic piece 13c as intended.

[0041] If the rigidity of the pressing wall 10d is low, the pressing wall 10d will bend inward, resulting in insufficient radial outward bending of the elastic piece 13c. However, the pressing wall 10d in this embodiment is equipped with a back-side rib 10e, and the rigidity of the pressing wall 10d is increased by the back-side rib 10e, so that the elastic piece 13c can bend as intended.

[0042] Subsequently, when the pressure on the head body 12 is released, the elastic force of the elastic piece 13c, which had been elastically deformed, acts on the head body 12, causing the head body 12 to begin rising. As a result, the lower part of the annular portion 5d and the inner sliding piece 6c come into liquid-tight contact again, and the piston 6 rises together with the internal member 5, causing the inside of the cylinder 1 to be depressurized. This causes the valve body 2b to separate from the bottom wall portion 1a, opening the suction port 1d, and allowing the contents of the container to be drawn into the cylinder 1 through the pipe 4. Subsequently, when the head body 12 is pressed, the contents are discharged again from the discharge port 12d.

[0043] Although one embodiment of the present invention has been described above with reference to the drawings, this embodiment may be modified as follows. For example, the pump described above is just one example, and the present invention also includes the use of other types of pumps.

[0044] For example, in this embodiment, the engaging portion 12g was convex and the engaged portion 13f was concave, but the engaging portion 12g may be concave and the engaged portion 13f may be convex. Also, in this embodiment, the engaged portion 13f was provided on the inner circumferential surface where the mounting hole 13b provided in the base portion 13a is located, but it may be provided on the inner circumferential surface of the connecting cylinder portion 12a, or it may be provided so as to span both the inner circumferential surface of the base portion 13a and the engaged portion 13f.

[0045] (Note) This specification discloses the following technologies in one aspect. The reference numerals listed below correspond to those used in the accompanying drawings, but are provided as examples only and are not intended to limit the inventions of this application.

[0046] (Technology 1) A pump-type dispenser (100) comprising a cap (10) attached to the mouth of a container that holds liquid contents, a pump driven by the movement of a stem (7a) held at the mouth by the cap (10), and a head connected to the stem (7a) having a discharge port (12d) for discharging the liquid contents to the outside, wherein the liquid contents in the container are discharged from the discharge port (12d) by moving the head along the central axis (O) of the stem (7a), The cap (10) has a pressing wall (10d) that protrudes toward the head, The head is The head body (12) includes the aforementioned discharge port (12d) and a connecting cylindrical portion (12a) connected to the stem (7a) and connected to the discharge port (12d), A pump-type discharger (100) having a base portion (13a) that is held by the head body (12) and has a mounting hole (13b) that is inserted into the connecting cylindrical portion (12a), an elastic member (13) that extends from the base portion (13a) toward the cap (10) and is flexible by the pressing wall (10d) when the head body (12) is advanced toward the cap (10), and a protruding wall (13d) that extends from the portion of the base portion (13a) where the mounting hole (13b) is provided in the opposite direction from the cap (10).

[0047] This technology enables a pump-type discharger, comprising a head body and an elastic member, to bend radially outward when the head body is pressed and the elastic piece on the elastic member bends radially outward. At this point, the base portion to which the elastic piece is connected has a protruding wall that contacts the connecting cylinder portion, suppressing the bending. This allows the elastic piece to bend radially outward as intended, and the desired elastic force can be obtained from the elastic piece.

[0048] (Technology 2) The connecting cylindrical portion (12a) has an engaging portion (12g) on ​​its outer circumferential surface, A pump-type discharger (100) according to Technical 1, wherein at least one of the inner circumferential surface of the base portion (13a) where the mounting hole (13b) is located, and the inner circumferential surface of the protruding wall (13d), has an engaged portion (13f) that engages with the engaging portion (12g).

[0049] This technology allows for more reliable prevention of bending of the base portion through the engagement and engagement portions, resulting in the elastic force obtained from the elastic piece being more reliably as intended.

[0050] (Technology 3) The aforementioned protruding wall (13d) is cylindrical, as described in Technical 1, for the pump-type discharger (100).

[0051] This technology ensures that the deflection of the base is reliably suppressed even when the pressing force is unevenly applied to the head body, and that the elastic force obtained from the elastic piece is stably and as intended.

[0052] Although one embodiment of the present invention has been described above, the present invention is not limited to such specific embodiments, and unless otherwise specifically limited in the above description, various modifications and changes are possible within the scope of the spirit of the present invention as described in the claims. For example, the configuration of the above-described embodiment can be added or deleted as appropriate, and the configuration of one embodiment can be provided in other embodiments. Furthermore, the effects in the above-described embodiment are merely illustrative of the effects that may result from the present invention. In other words, the effects of the present invention are not limited to the above-described effects, and additional effects may also be produced in addition to the above-described effects. [Explanation of Symbols]

[0053] 1: Cylinder 1a: Bottom wall part 1b: Cylinder wall 1c: Flange wall 1d: Inlet 1e: Holding cylinder 1F: Ventilation opening 2: Valve member 2a: base 2b: Valve body 2c: Connecting piece 4: Pipe 5: Internal components 5a: Connecting tube 5b: Bottom 5c: Communication port 5d: Annular section 6: Piston 6a: base 6b: Outer sliding piece 6c: Inner sliding piece 7: Cylindrical member 7a: Stem 7b: Expanded diameter part 8: Holder 8a: Holder base 8b: Flange 9: Packing 10: Cap 10a: Ceiling wall 10b: Lower peripheral wall 10c: Female thread section 10d: Pressure wall 10e: Ribs on the reverse side 10f: Upper peripheral wall 12: Head body 12a: Connecting cylinder part 12b:Top 12c: Nozzle 12d: Discharge port 12e: Outer wall 12f: Reinforcement rib 12g: Engagement part 13: Elastic member 13a: Base section 13b: Mounting hole 13c: Elastic piece 13d:Protruding wall 13e: External protruding wall 13f: Engaged part 14: Cover 14a: Cover top wall 14b: Cover surrounding wall 100: Pump-type dispensing device O: Central axis

Claims

1. A pump-type dispenser comprising a cap attached to the mouth of a container holding a liquid, a pump driven by the movement of a stem held at the mouth by the cap, and a head connected to the stem having a discharge port for discharging the liquid to the outside, wherein the liquid inside the container is discharged from the discharge port by moving the head along the central axis of the stem, The cap has a pressing wall that protrudes toward the head, The head is A head body comprising the aforementioned discharge port and a connecting cylindrical portion connected to the stem and connected to the discharge port, A pump-type discharger having a base portion that is held by the head body and has a mounting hole into the connecting cylindrical portion, and an elastic member that extends from the base portion toward the cap and bends due to the pressing wall when the head body is advanced toward the cap, and a protruding wall that extends from the portion of the base portion having the mounting hole toward the cap in the opposite direction from the cap.

2. The outer surface of the connecting cylindrical portion has an engaging portion, The pump-type discharger according to claim 1, wherein at least one of the inner circumferential surface of the base portion where the mounting hole is located and the inner circumferential surface of the protruding wall has an engaged portion that engages with the engaging portion.

3. The pump-type discharger according to claim 1, wherein the protruding wall is cylindrical.

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