JP2024141041A - Pump type dispenser - Google Patents

Abstract

To provide a pump type discharge device which can discharge a content fluid similarly to the conventional one and is excellent in recyclability.SOLUTION: A pump type discharge device 100 includes a pump which is held on a mouth part by a cap 10 and is driven by advancing and retreating movements of a stem 7a and a head 12 which includes a discharge port 12d for discharging a content fluid to an environment and is connected to the stem 7a. On one of the head 12 and the cap 10, an extension part 12e which extends to the other out of the head 12 and the cap 10 is provided. On the other of the head 12 and the cap 10, a pair of outward falling elastic pieces 10e which bend in a direction separated from a central axis line O by the extension part 12e in advancing the head 12 to the cap 10 and a connecting part 10g which connects the pair of the outward falling elastic pieces 10e and is elastically deformable in a direction in which a distance between the pair of the outward falling elastic pieces 10e becomes large are provided.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pump-type dispenser.

A known pump-type dispenser includes a cap that is attached to the mouth of a container, a pump that is held at the mouth by the cap and is driven by the back and forth movement of a stem, and a head that is connected to the stem; the liquid contents in the container are dispensed from the head's outlet by moving the head toward the cap (see, for example, Patent Document 1).

As shown in Patent Document 1, inside such a pump-type dispenser, a coil spring is provided to return the head, which has been moved toward the cap, to its initial position.

JP 2011-31950 A

However, while most of the components of this type of pump dispenser are made of synthetic resin, the coil spring is made of metal. For this reason, when it is discarded after use, it cannot be recycled as a resin product in this state. Furthermore, in general, in this type of pump dispenser, the components are firmly fixed to each other, for example by fitting, to prevent them from coming loose during normal use. Therefore, it takes time to disassemble the pump dispenser and separate the coil spring from the other components.

The present invention aims to solve these problems by proposing a pump-type dispenser that can dispense the liquid contents in the same way as conventional dispensers, and that also has excellent recyclability.

The present invention relates to a pump-type dispenser comprising: a cap that is attached to the mouth of a container that contains a liquid content; a pump that is held at the mouth by the cap and is driven by the back and forth movement of a stem; and a head that has a discharge port for discharging the liquid content to the outside and is connected to the stem, the head being moved toward the cap to discharge the liquid content in the container from the discharge port,
An extension portion is provided on one of the head and the cap, the extension portion extending toward the other of the head and the cap,
This pump-type dispenser is provided with a pair of outwardly inclined elastic pieces on either the head or the cap that are bent by the extension portion in a direction away from the central axis of the stem when the head is advanced toward the cap, and a connecting portion that connects the pair of outwardly inclined elastic pieces and is elastically deformable in a direction that widens the gap between the pair of outwardly inclined elastic pieces.

The other of the head and the cap is provided with an inwardly inclined elastic piece at a position adjacent to each of the pair of outwardly inclined elastic pieces, the inwardly inclined elastic piece being bent by the extension portion in a direction approaching the central axis of the stem when the head is advanced toward the cap,
It is preferable that the connecting portion extends between the pair of outwardly inclined elastic pieces so as to approach the inwardly inclined elastic piece.

the connecting portion is provided at a position where it intersects with the extending portion when the head is advanced toward the cap,
The extension portion preferably has a notch portion for avoiding interference with the connecting portion.

When the head is moved toward the cap to its forward limit, it is preferable that the connecting portion and the tip of the extension portion come into contact, or that there is a gap between the connecting portion and the tip of the extension portion.

According to the pump-type dispenser of the present invention, when the head is moved toward the cap, the pair of outwardly inclined elastic pieces are bent away from the central axis of the stem by the extension, so that the head can be returned to its initial position when the bent outwardly inclined elastic pieces are restored. Furthermore, the pair of outwardly inclined elastic pieces are connected to each other and are provided with a connecting part that can be elastically deformed in a direction that widens the gap between them, and the head can be more reliably returned because the restoring force of the connecting part also acts on the head. Therefore, even if a pump with a relatively large sliding resistance during operation is used, the head can be returned to its initial position without any problems. In addition, when a bending elastic piece such as the outwardly inclined elastic piece is repeatedly bent with a relatively large load, it may become sagging and its restoring ability may decrease. However, in the pump-type dispenser of the present invention, the load received by the outwardly inclined elastic piece can be reduced by restoring the head by both the outwardly inclined elastic piece and the connecting part, so that the effect of sagging can be suppressed.

4 is a vertical cross-sectional view (viewed along the arrow B in FIG. 3 ) from the side, showing a state before an outwardly collapsing elastic piece is bent in one embodiment of a pump-type discharger according to the present invention. FIG. 3 is a vertical cross-sectional view (a vertical cross-sectional view taken along the arrow C in FIG. 3 ) as seen from behind, showing a state before an inwardly collapsing elastic piece in the embodiment shown in FIG. 1 is bent; 3 is a diagram showing the outwardly inclined elastic pieces, the inwardly inclined elastic pieces, and the connecting portion before bending, as viewed from the direction of arrow A in FIGS. 1 and 2 . FIG. 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 an outwardly collapsing elastic piece is bent. 3 is a vertical cross-sectional view seen from behind, showing a state in which the head is pressed from the state shown in FIG. 2 and the inwardly collapsing elastic pieces are bent. 4 is a diagram showing the outwardly inclined elastic pieces, the inwardly inclined elastic pieces, and the connecting portion after bending, similar to FIG. 3 . FIG. FIG. 5 is a diagram showing a pump-type dispenser which is a modified example of the pump-type dispenser shown in FIG. 1, in accordance with FIG. 4. FIG. 8 is a view showing the modified pump type dispenser shown in FIG. 7, similar to FIG. 5;

The pump-type dispenser 100, which is one embodiment of the pump-type dispenser according to the present invention, will be described below with reference to the drawings. In this specification and the like, the up-down direction refers to the direction along the illustrated central axis O (the central axis of the stem 7a described later), with the side where the pipe 4 is located being the "lower" side and the side where the head 12 is located being the "upper" side. The radial direction refers to the direction perpendicular to the central axis O in a plane perpendicular to the central axis O, and the circumferential direction refers to the direction around the central axis O in this plane. The front side refers to the side where the nozzle 12c described later is directed (the left side in FIG. 1), and the back side refers to the opposite side (the right side in FIG. 1). The left side and right side refer to the left and right directions when viewed from the front side toward the back side.

The pump-type dispenser 100 of this embodiment is used by attaching it to the mouth of a bottle-shaped container (not shown). The liquid content dispensed by the pump-type dispenser 100 is, for example, shampoo, body soap, hand soap, facial cleanser, etc.

The pump-type dispenser 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 cover 11, and a head 12. Here, the cylinder 1, the valve member 2, the internal member 5, the piston 6, the cylindrical member 7, and the holder 8 are members that constitute the "pump" in this specification. Among the above members, the valve member 2, the piston 6, and the packing 9 are made of elastic soft synthetic resin (e.g., polyethylene (LDPE, HDPE, foamed PE)), and the other members are made of hard synthetic resin (e.g., polypropylene (PP), polybutylene terephthalate (PBT), polyacetal (POM), polyketone (POK) resin, etc.). Each member that constitutes the pump-type dispenser 100 is basically formed in a shape centered on the central axis O.

The cylinder 1 has a disk-shaped bottom wall 1a with a central protruding upward, a cylindrical tube wall 1b that stands up from the outer edge of the bottom wall 1a, and a flange wall 1c that extends radially outward from the upper part of the tube wall 1b. A through hole (suction port 1d) is provided in the protruding central part of the bottom wall 1a. A cylindrical retaining tube 1e that surrounds the suction port 1d and extends downward to hold the pipe 4 is provided on the underside of the bottom wall 1a. A through hole (vent hole 1f) is provided in the tube wall 1b.

The valve member 2 has a base 2a, a valve body 2b that covers the suction port 1d and seats on the upper surface of the bottom wall 1a, and an elastically deformable connecting piece 2c that connects the base 2a and the valve body 2b. The valve member 2 functions as a check valve, and when the pressure inside the cylinder 1 is reduced, the valve body 2b that has been closing the suction port 1d moves away from the bottom wall 1a to open the suction port 1d.

In this embodiment, the base 2a is cylindrical with a lid and has an opening (not shown) through which the liquid content passes after passing through the suction port 1d. The base 2a is fitted and held against the inner circumferential surface of the cylindrical wall portion 1b, so that the valve member 2 is held within the cylinder 1.

The pipe 4 is hollow, and its upper end is inserted into the retaining tube 1e and is held in place by fitting therein.

The internal member 5 is disposed inside the cylinder 1 and moves up and down relative to the cylinder 1. The internal member 5 comprises a cylindrical connecting tube 5a and a bottom portion 5b that closes the lower end of the connecting tube 5a and extends radially outward. The connecting tube 5a is provided with a hole (communication port 5c) that passes through it, and the top surface of the bottom portion 5b is provided with an annular portion 5d that is located radially outward from the connection portion with the connecting tube 5a.

The piston 6 is inserted through the connecting tube 5a and positioned above the bottom 5b. The piston 6 in this embodiment has a circular base 6a. An outer sliding piece 6b extending upward and downward from the base 6a is provided on the outer edge of the base 6a. The outer sliding piece 6b slidably and liquid-tightly contacts the inner peripheral surface of the tube wall portion 1b. An inner sliding piece 6c extending upward and downward from the base 6a is provided on the inner edge of the base 6a. The lower part of the inner sliding piece 6c slidably and liquid-tightly contacts the inner peripheral surface of the annular portion 5d, and the upper part slidably and liquid-tightly contacts the inner peripheral surface of the enlarged diameter portion 7b of the tubular member 7, which will be described later.

The tubular member 7 is a member that is generally tubular. The tubular member 7 has a cylindrical stem 7a and an expanded diameter portion 7b that is connected to the lower end of the stem 7a and has a larger diameter than the stem 7a. When the connecting tube 5a is inserted into the stem 7a, the two are fitted together, so that the internal member 5 and the tubular member 7 move together relative to the cylinder 1.

The holder 8 has a portion located radially outward of the stem 7a and a portion located radially outward of the enlarged diameter portion 7b, and is equipped with a holder base 8a that is fitted and held against the inner peripheral surface of the cylindrical wall portion 1b. A flange 8b extending radially outward is provided at the upper end of the holder base 8a. The holder 8 prevents the internal member 5, piston 6, and cylindrical member 7 from slipping out of the cylinder 1.

The packing 9 is in the shape of a circular ring plate, and is inserted into and held in the cylindrical wall portion 1b of the cylinder 1. 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 turned over, for example.

The cap 10 has a disk-shaped top wall 10a with a through hole in the center. A lower peripheral wall 10b extending downward is provided on the outer edge of the top wall 10a. The upper part of the inner peripheral surface of the lower peripheral wall 10b can bulge radially inward to fit and hold the flange wall 1c, thereby holding the cylinder 1 in the cap 10. The inner peripheral surface of the lower peripheral wall 10b is provided with a female threaded portion 10c that screws into a male threaded portion provided on 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. The outer peripheral surface of the lower peripheral wall 10b is provided with a rotation prevention recess 10d extending in the vertical direction, as shown in the partial enlarged view of FIG. 1. A plurality of rotation prevention recesses 10d are provided at intervals in the circumferential direction.

As shown in FIG. 1, the cap 10 includes a plate-like outwardly inclined elastic piece 10e that extends upward from the upper surface of the top wall 10a and is elastically deformable radially outward. As shown in FIG. 3, the outwardly inclined elastic piece 10e in this embodiment is arc-shaped about the central axis O in plan view. The upper end of the outwardly inclined elastic piece 10e is inclined so as to widen radially outward as it extends upward. In this embodiment, one outwardly inclined elastic piece 10e is provided on each of the front side and the back side (two in total) so as to face the central axis O.

Furthermore, as shown in FIG. 2, the cap 10 includes a plate-shaped inwardly inclined elastic piece 10f that extends upward from the upper surface of the top wall 10a and is elastically deformable radially inward. As shown in FIG. 3, the inwardly inclined elastic piece 10f in this embodiment is arc-shaped about the central axis O in a plan view. The upper end of the inwardly inclined elastic piece 10f is inclined so as to narrow radially inward as it extends upward. In this embodiment, a total of two inwardly inclined elastic pieces 10f are provided, and each inwardly inclined elastic piece 10f is provided in a position adjacent to each of the two outwardly inclined elastic pieces 10e (in this embodiment, on the left and right sides facing the central axis O).

The cap 10 also includes a connecting portion 10g that connects the pair of outwardly falling elastic pieces 10e. The connecting portion 10g can be elastically deformed in a direction that widens the gap between the pair of outwardly falling elastic pieces 10e. The connecting portion 10g of this embodiment extends between the pair of outwardly falling elastic pieces 10e so as to approach the inwardly falling elastic piece 10f. To explain this in detail, in a plan view as shown in FIG. 3, the connecting portion 10g of this embodiment has one end portion integrally connected to one of the outwardly falling elastic pieces 10e and the other end portion integrally connected to the other outwardly falling elastic piece 10e both extending linearly, and the central portion extends in an arc shape around the central axis O so as to approach the inwardly falling elastic piece 10f from the one end portion and the other end portion. As shown in FIG. 3, the connecting portion 10g of this embodiment is provided on the left side and the right side (two in total). In addition, the vertical position of the connecting portion 10g is near the upper end of the outwardly falling elastic piece 10e as shown in FIG. 1.

The cover 11 has a cylindrical cover wall 11a. The cover wall 11a surrounds the outwardly inclined elastic piece 10e and the inwardly inclined elastic piece 10f at the upper part, and surrounds the lower peripheral wall 10b at the lower part. The cover wall 11a makes the outwardly inclined elastic piece 10e and the inwardly inclined elastic piece 10f invisible from the outside, improving the appearance. The inner peripheral surface of the cover wall 11a has a support rib 11b extending in the vertical direction at the upper part, and an engagement protrusion 11c protruding radially inward at the lower part. When the cover 11 is attached to the cap 10 as shown in FIG. 1, the lower surface of the support rib 11b contacts the upper surface of the top wall 10a, and the engagement protrusion 11c engages with the lower end of the lower peripheral wall 10b, so that the cover 11 is held in place by the cap 10. In addition, as shown in the partially enlarged view of FIG. 1, an anti-rotation rib 11d extending in the vertical direction is provided on the inner peripheral surface of the cover peripheral wall 11a below the support rib 11b. The anti-rotation rib 11d engages with the anti-rotation recess 10d, so that the cover 11 is held in place by the cap 10. An inward flange 11e extending radially inward is provided at the upper end of the cover peripheral wall 11a.

The head 12 is cylindrical and has a tubular portion 12a into which the stem 7a is inserted and fitted. The upper portion of the tubular portion 12a is provided with a top portion 12b whose upper surface is shaped so as to be concave downward and which has a passage inside that leads to the tubular portion 12a. The top portion 12b is provided with a nozzle 12c which is cylindrical and extends radially outward and leads to a passage provided inside the top portion 12b. The tip of the nozzle 12c is provided with a discharge port 12d through which the content liquid is discharged by the pump type discharger 100.

The head 12 also includes an extension 12e that extends downward from the top 12b and the nozzle 12c. In this embodiment, the extension 12e is cylindrical and centered on the central axis O. The lower end (tip) of the extension 12e is inclined so as to narrow radially inward as it extends generally downward, as shown in Figures 1 and 2 and Figures 4 and 5. Note that in Figures 1 and 2,
The outwardly-inclined elastic piece 10e and the inwardly-inclined elastic piece 10f extend vertically, and the lower end of the extending portion 12e is illustrated as overlapping the upper ends of the outwardly-inclined elastic piece 10e and the inwardly-inclined elastic piece 10f, but in reality, the outwardly-inclined elastic piece 10e is slightly tilted radially outward and the inwardly-inclined elastic piece 10f is slightly tilted radially inward so that this overlap is eliminated, and the head 12 moves to the upper limit (rear limit). In addition, in the extending portion 12e, at the portion where the connecting portion 10g is connected to the outwardly-inclined elastic piece 10e, a notch 12f is provided that cuts the extending portion 12e from the bottom to the top, as shown in FIG.

In the pump-type dispenser 100 constructed from such members, before the head 12 is pressed as shown in Figures 1 to 3, the tip of the extension 12e is in contact with the outwardly inclined elastic piece 10e and the inwardly inclined elastic piece 10f, and the head 12 is in a raised state (the head 12 is retracted from the cap 10).

When the head 12 is pressed from above to lower it (the head 12 is advanced toward the cap 10), the stem 7a is pushed down together with the head 12 (the stem 7a moves toward the cap 10 along the central axis O) as shown in Figures 4 and 5. As the stem 7a is pushed down, the bottom 5b also descends via the connecting tube 5a, and the liquid-tight contact between the annular portion 5d and the lower portion of the inner sliding piece 6c is released. When the head 12 is further pressed down, the piston 6 also descends together with the tubular member 7 and the internal member 5, and the inside of the cylinder 1 is pressurized. As a result, the liquid in the cylinder 1 passes through the communication port 5c, passes through the connecting tube 5a, the stem 7a, the tubular portion 12a, the passage provided inside the top 12b, and the inside of the nozzle 12c, and is discharged from the discharge port 12d to the outside world. When the head 12 is pressed and the piston 6 descends below the vent 1f, the container (not shown) communicates with the outside world through the vent 1f. This prevents the pressure inside the container from becoming negative even if the amount of liquid contained in the container decreases, preventing the container from being deformed or crushed.

When the head 12 is pressed down, the extension 12e applies a pressing force to the outwardly inclined elastic piece 10e and the inwardly inclined elastic piece 10f, so that the outwardly inclined elastic piece 10e bends radially outward, and the inwardly inclined elastic piece 10f bends radially inward. As the head 12 is pressed down, the distance between the two outwardly inclined elastic pieces 10e increases, so that the connecting piece 10g is elastically deformed so as to be stretched, as shown in FIG. 6. When the connecting piece 10g is stretched, the arc-shaped central portion protruding in a direction intersecting the stretching direction is particularly stretched, so that even if the inwardly inclined elastic piece 10f bends radially inward, the inwardly inclined elastic piece 10f does not come into contact with the connecting piece 10g and the bending of the inwardly inclined elastic piece 10f is not hindered. Also, as shown in FIG. 6, in this embodiment, the central portion of the connecting portion 10g is set so that there is a gap between the cylindrical portion 12a and the connecting portion 10g even in the stretched state, so that the elastic deformation of the connecting portion 10g is not hindered by the cylindrical portion 12a.

When the pressure on the head 12 is then released, the restoring forces of the elastically deformed outwardly inclined elastic piece 10e, inwardly inclined elastic piece 10f, and connecting part 10g act on the head 12, causing it to begin to rise. As a result, the piston 6 rises together with the internal member 5 while the lower part of the inner sliding piece 6c comes into liquid-tight contact with the annular part 5d again, reducing the pressure inside the cylinder 1. As a result, the valve body part 2b separates from the bottom wall part 1a, opening the suction port 1d, and the liquid content in the container can be sucked into the cylinder 1 through the pipe 4.

In this way, the pump-type dispenser 100 of this embodiment can return the head 12 after discharging the liquid content without using a metal coil spring, and can be used in the same way as a conventional pump-type dispenser. In addition, elastic pieces that can be bent and deformed, such as the outwardly inclined elastic piece 10e and the inwardly inclined elastic piece 10f, can become worn and lose their restoring ability when repeatedly bent with a relatively large load. However, in the pump-type dispenser 100, the restoring force of the connecting part 10g also contributes to the return of the head 12, and the load received by the outwardly inclined elastic piece 10e and the inwardly inclined elastic piece 10f can be reduced, thereby suppressing the effect of the wear. In addition, since the outwardly inclined elastic piece 10e bends in the opposite direction to the inwardly inclined elastic piece 10f, a force that twists the extension part 12e also acts between the outwardly inclined elastic piece 10e and the inwardly inclined elastic piece 10f. Therefore, the head 12 can be returned more reliably.

In the pump-type dispenser 100 shown in Figures 1 to 6, the connecting portion 10g is provided near the upper end of the outwardly inclined elastic piece 10e as shown in Figure 1. Therefore, when the outwardly inclined elastic piece 10e is bent radially outward, it is greatly stretched, and the elastic force exerted by the connecting portion 10g can be increased. However, when the head 12 is pressed, the lower end of the extension portion 12e moves below the connecting portion 10g, and the extension portion 12e and the connecting portion 10g intersect. Therefore, in the pump-type dispenser 100 shown in Figures 1 to 6, a notch portion 12f is provided in the connecting portion 10g to avoid interference between the connecting portion 10g and the extension portion 12e. However, if the notch portion 12f is provided, it is necessary to align the circumferential position of the notch portion 12f with the connecting portion 10g when attaching the head 12 to the stem 7a.

The pump type dispenser 100A shown in Figures 7 and 8 is a modified version of the pump type dispenser 100 in which the notch 12f has been eliminated. In the pump type dispenser 100A, the connecting portion 10g is provided near the vertical middle portion of the outwardly inclined elastic piece 10e, and when the head 12 is moved to the forward limit as shown in Figure 7, there is a gap between the tip of the extension portion 12e and the connecting portion 10g. In other words, even when the head 12 is moved to the forward limit, the extension portion 12e and the connecting portion 10g do not interfere with each other, so the above-mentioned notch 12f can be eliminated, and therefore, when attaching the head 12 to the stem 7a, circumferential alignment is not required, making assembly easier. In the pump type dispenser 100A, the vertical position of the connecting portion 10g may be a position where the tip of the extension portion 12e and the connecting portion 10g come into contact when the head 12 is moved to the forward limit.

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 added or deleted as appropriate, and the configuration of one embodiment can be applied to other embodiments. 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.

For example, the pump described above is an example, and the present invention also includes cases where other types of pumps are used. The number of the outwardly inclined elastic pieces 10e and the inwardly inclined elastic pieces 10f is not limited to the above embodiment and can be changed as appropriate. The positions at which the outwardly inclined elastic pieces 10e and the inwardly inclined elastic pieces 10f are provided can also be changed as appropriate. For example, the outwardly inclined elastic pieces 10e can be provided on the left and right sides of the cap 10, and the inwardly inclined elastic pieces 10f can be provided on the front and back sides of the cap 10. Furthermore, the inwardly inclined elastic pieces 10f and the outwardly inclined elastic pieces 10e are not limited to being arc-shaped in plan view as shown in the figure, and may be, for example, linear in plan view. Furthermore, the extension portion 12e is not limited to being cylindrical, and may be, for example, rectangular.

The connecting portion 10g can also be changed as appropriate, and is not limited to two as described above, but may be one or three or more. The shape of the connecting portion 10g is not limited to one with an arc-shaped central portion as shown in FIG. 3, but may extend so that the central portion is bent in an L-shape, or may extend in a wavy shape. Furthermore, the connecting portion 10g is not limited to one that is integrally connected to the outwardly inclined elastic piece 10e, but may be configured such that a member having the connecting portion 10g is prepared separately from the cap 10, and the connecting portion 10g is fixed to the outwardly inclined elastic piece 10e.

In the above-described embodiment, the cap 10 is provided with the outwardly inclined elastic piece 10e, the inwardly inclined elastic piece 10f, and the connecting portion 10g, and the head 12 is provided with the extension portion 12e, but these may be interchanged and the head 12 may be provided with the outwardly inclined elastic piece 10e, the inwardly inclined elastic piece 10f, and the connecting portion 10g, and the cap 10 may be provided with the extension portion 12e.

1: Cylinder 1a: Bottom wall 1b: Cylinder wall 1c: Flange wall 1d: Inlet 1e: Retaining cylinder 1f: Vent 2: Valve member 2a: Base 2b: Valve body 2c: Connecting piece 4: Pipe 5: Internal member 5a: Connecting cylinder 5b: Bottom 5c: Communication port 5d: Annular portion 6: Piston 6a: Base 6b: Outer sliding piece 6c: Inner sliding piece 7: Cylindrical member 7a: Stem 7b: Expanded portion 8: Holder 8a: Holder base 8b: Flange 9: Gasket 10: Cap 10a: Top wall 10b: Lower peripheral wall 10c: Female thread portion 10d: Anti-rotation recess 10e: Outwardly inclined elastic piece 10f: Inwardly inclined elastic piece 10g: Connection portion 11: Cover 11a: Cover peripheral wall 11b: Support rib 11c: Engagement protrusion 11d: Anti-rotation rib 11e: Inward flange 12: Head 12a: Cylindrical portion 12b: Top portion 12c: Nozzle 12d: Discharge port 12e: Extension portion 12f: Notch portion 100, 100A: Pump-type discharger O: Central axis

Claims (4)

A pump-type dispenser comprising: a cap that is attached to the mouth of a container that contains a liquid content; a pump that is held at the mouth by the cap and is driven by the back and forth movement of a stem; and a head that has a discharge port for discharging the liquid content to the outside and is connected to the stem, the head being moved toward the cap to discharge the liquid content from the discharge port,
An extension portion is provided on one of the head and the cap, the extension portion extending toward the other of the head and the cap,
A pump-type dispenser is provided on the other of the head and the cap, wherein a pair of outwardly inclined elastic pieces are bent in a direction away from the central axis of the stem by the extension portion when the head is advanced toward the cap, and a connecting portion is provided which connects the pair of outwardly inclined elastic pieces and is elastically deformable in a direction widening the spacing between the pair of outwardly inclined elastic pieces. The other of the head and the cap is provided with an inwardly inclined elastic piece at a position adjacent to each of the pair of outwardly inclined elastic pieces, the inwardly inclined elastic piece being bent by the extension portion in a direction approaching the central axis of the stem when the head is advanced toward the cap,
The pump-type discharger according to claim 1 , wherein the connecting portion extends between the pair of outwardly inclined elastic pieces so as to approach the inwardly inclined elastic pieces. the connecting portion is provided at a position where it intersects with the extending portion when the head is advanced toward the cap,
The pump-type dispenser according to claim 1 , wherein the extending portion has a notch for avoiding interference with the connecting portion. The pump-type dispenser according to claim 1, wherein when the head is moved toward the cap to its forward limit, the connecting portion and the tip of the extending portion come into contact with each other, or there is a gap between the connecting portion and the tip of the extending portion.

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