Pump type dispenser

Abstract

To provide a pump type discharger in which settling of an elastic piece is hard to occur.SOLUTION: In the pump type dispenser 100, the head 11 is rotatable about the central axis O with respect to the cap 10 and has the extending portion side 11e, the protrusion portion side 11f, and the side 11g, and the cap 10 has the elastic piece side 11e that is bent by the extending portion side 10r and the peripheral wall 11e located radially outward of the extending portion side 10d. When the head 11 is rotated to the first rotation position, the lower surfaces of the protrusion portion 10d and the side 10e are not in contact with the lower step portion 11g and the side 10k, and the head 11 is positioned at a first height at which the extension portion 11f is supported by the elastic piece 11g, the lower step portion 10e and the side 10k being partially provided in the circumferential direction of the peripheral wall portion and supporting the lower surfaces of the protrusion portion and the side, 11e 11f 10r, when the head portion 11 is rotated to the second rotation position, the lower surfaces of the projecting portions 11f and 11g are supported by the lower side step portions 10e and 10k, and the head portion 11 is positioned at a second height that is higher than the first height.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a pump-type dispenser. [Background technology]

[0002] 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 up and down movement (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 discharge port of the head by moving the head toward the cap.

[0003] As shown in Patent Document 1, a coil spring is provided inside such a pump-type dispenser to return the head, which has been moved toward the cap, to its initial position. Although most of the components of such a pump-type dispenser are made of synthetic resin, the coil spring is made of metal, which poses a problem in that the dispenser cannot be recycled as a resin product in its current state when disposed of after use. Furthermore, in this type of pump-type dispenser, the components are firmly fixed to each other, for example, by fitting, to prevent them from coming apart during normal use. Therefore, it takes time and effort to disassemble the pump-type dispenser and separate the coil spring from the other components.

[0004] To address these problems, Patent Document 2 discloses a pump-type dispenser in which an elastic piece is provided on the cap or head instead of a coil spring. In the pump-type dispenser of Patent Document 2, the elastic piece elastically deforms when the head is lowered toward the cap, and the elastically deformed elastic piece returns to its original shape, allowing the head to be raised in the same way as in conventional dispensers. Furthermore, the pump-type dispenser of Patent Document 2 does not require separation of the coil spring when disposed of, and can be reused as a resin product as is, making it highly recyclable. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-31950 [Patent Document 2] Japanese Patent Application Laid-Open No. 2024-50382 Summary of the Invention [Problem to be solved by the invention]

[0006] However, flexible elastic pieces generally tend to sag, and when sag occurs, they may not provide sufficient restoring force. Therefore, when sag occurs in the elastic pieces provided in a pump-type dispenser, there is a risk that the head will not return to its initial upper limit. The pump-type dispenser of Patent Document 2 uses two types of elastic pieces that flex in opposite directions, so that even if sag occurs, the effects of sag are suppressed by the twisting force between the two types of elastic pieces. However, it would be preferable to suppress the effects of sag more effectively.

[0007] In view of the above, an object of the present invention is to provide a pump-type dispenser in which the elastic piece is less likely to wear out. [Means for solving the problem]

[0008] The present invention relates to a pump-type dispenser comprising a cap attached to the mouth of a container that contains a liquid content, a pump that is held at the mouth by the cap and driven by the up and down movement of a stem, and a head that has a discharge port that discharges the liquid content to the outside and is connected to the stem, and the liquid content in the container is discharged from the discharge port by lowering the head toward the cap. The head is rotatable relative to the cap about the central axis of the stem, and has an extension portion that extends toward the cap and a protrusion that protrudes radially outward from the extension portion, The cap is a pump-type dispenser that has an elastic piece that is bent by the extension portion when the head is lowered, and a peripheral wall located radially outside the extension portion, the peripheral wall having a lower step portion that is partially provided in the circumferential direction and supports the underside of the protrusion portion, when the head is rotated to a first rotation position, the underside of the protrusion portion is not in contact with the lower step portion and the head is located at a first height where the extension portion is supported by the elastic piece, and when the head is rotated to a second rotation position, the underside of the protrusion portion is supported by the lower step portion and the head is located at a second height higher than the first height. [Effects of the Invention]

[0009] According to the pump-type dispenser of the present invention, when the head is rotated to the second rotation position, the lower surface of the protrusion is supported by the lower step, and as a result, the head is positioned above the first height at which the extension is supported by the elastic piece. In other words, by rotating the head to the second rotation position when the content liquid is not being dispensed, the load on the elastic piece can be reduced (or the load from the extension is not applied to the elastic piece), making it less likely that the elastic piece will wear out. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a cross-sectional side view of one embodiment of a pump-type dispenser according to the present invention, showing a state in which a head has been rotated to a first rotation position. FIG. [Figure 2] FIG. 2 is a cross-sectional view taken along line AA shown in FIG. [Figure 3]FIG. 2 is a perspective view of the cap shown in FIG. [Figure 4] FIG. 10 is a diagram showing a state in which the head is lowered. [Figure 5] FIG. 10 is a diagram showing a state in which the head is rotated to a second rotation position. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, a pump-type dispenser 100, which is one embodiment of the pump-type dispenser according to the present invention, will be described 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, which will be described later), with the side on which the pipe 4 is located being the "bottom" and the side on which the head 11 is located being the "top." Furthermore, the radial direction refers to a direction perpendicular to the central axis O within a plane perpendicular to the central axis O, and the circumferential direction refers to a direction circumferential around the central axis O within this plane.

[0012] 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 content to be dispensed by the pump-type dispenser 100 is, for example, a cosmetic product (such as a milky lotion or a lotion), shampoo, body soap, hand soap, or facial cleanser.

[0013] 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 tubular member 7, a holder 8, a packing 9, a cap 10, and a head 11. The cylinder 1, the valve member 2, the internal member 5, the piston 6, the tubular member 7, and the holder 8 are components that constitute the "pump" in this specification. Of the above components, the valve member 2, the piston 6, and the packing 9 are made of a soft, elastic synthetic resin (e.g., polyethylene (LDPE, HDPE, foamed PE)), while the other components are made of a hard synthetic resin (e.g., polypropylene (PP), polybutylene terephthalate (PBT), polyacetal (POM), polyketone (POK) resin, etc.). Each component of the pump-type dispenser 100 is essentially shaped around a central axis O.

[0014] Cylinder 1 has a disk-shaped bottom wall 1a with an upwardly protruding central portion, a cylindrical tube wall 1b rising from the outer edge of bottom wall 1a, and a flange wall 1c extending radially outward from the top of tube wall 1b. A through-hole (suction port 1d) is provided in the protruding central portion of bottom wall 1a. A cylindrical holding tube 1e is provided on the underside of bottom wall 1a, surrounding suction port 1d and extending downward to hold pipe 4. A through-hole (vent hole 1f) is provided in tube wall 1b.

[0015] The valve member 2 includes a base 2a, a valve body 2b that covers the suction port 1d inside the base 2a and sits 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, opening the suction port 1d.

[0016] In this embodiment, the base 2a is cylindrical with a lid, with the central portion of the top surface protruding upward, 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 on the inner circumferential surface of the cylindrical wall portion 1b, thereby holding the valve member 2 within the cylinder 1.

[0017] The pipe 4 is hollow, and its upper end is inserted into the holding cylinder 1e and is fitted and held therein.

[0018] The internal member 5 is disposed inside the cylinder 1 and moves up and down relative to the cylinder 1. The internal member 5 is cylindrical and includes a connecting tube 5a with a closed lower end. As shown in FIG. 1, the lower portion of the connecting tube 5a protrudes radially outward. The internal member 5 also includes a lower end 5b that extends downward from the connecting tube 5a and then radially outward. The connecting tube 5a is provided with a hole (communication port 5c) that passes through it, and the lower end 5b is provided with a hole (lower end communication port 5d) that passes through it.

[0019] The piston 6 is inserted into the connecting tube 5a and disposed inside the cylinder 1. The piston 6 in this embodiment has an annular 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 circumferential surface of the tube wall 1b. An inner sliding piece 6c extending upward and downward from the base 6a is provided on the inner edge of the base 6a. A lower part of the inner sliding piece 6c liquid-tightly contacts the lower part of the connecting tube 5a that protrudes radially outward, and an upper part of the inner sliding piece 6c slidably and liquid-tightly contacts the inner circumferential surface of an expanded diameter portion 7b (described later) of the tubular member 7.

[0020] The tubular member 7 is a member having an overall tubular shape. The tubular member 7 includes 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, and the internal member 5 and the tubular member 7 move integrally relative to the cylinder 1.

[0021] The holder 8 has a portion located radially outward of the stem 7a and a portion located radially outward of the expanded diameter portion 7b, and is equipped with a holder base 8a that is inserted into the inside of the cylindrical wall portion 1b. The outer peripheral surface of the holder base 8a is configured to be fitted and held by the inner peripheral surface of the cylindrical wall portion 1b, and fitting the holder base 8a into the cylindrical wall portion 1b prevents the internal member 5, piston 6, and cylindrical member 7 from slipping out of the cylinder 1. A flange 8b extending radially outward is provided at the upper end of the holder base 8a, and when the holder base 8a is inserted into the inside of the cylindrical wall portion 1b, the flange 8b comes into contact with the upper surface of the flange wall 1c, preventing the holder base 8a from being inserted excessively.

[0022] The packing 9 is in the shape of an annular plate and is inserted into and fitted into the cylindrical wall 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 opening of the container and the flange wall 1c. This prevents problems such as the content liquid overflowing from the opening when the container is turned over, for example.

[0023] The cap 10 has a disk-shaped top wall 10a with a through-hole in the center. A cylindrical 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 bulges radially inward to fit and hold a 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 opening of the container. The cap 10 can be attached to the container by screwing the male threaded portion and the female threaded portion 10c together.

[0024] The cap 10 also includes a cylindrical upper peripheral wall 10d extending upward from the outer edge of the top wall 10a. The upper peripheral wall 10d corresponds to the "peripheral wall" in this specification. As shown in FIG. 3, the inner peripheral surface of the upper peripheral wall 10d is provided with a lower step (first lower step 10e) where the lower portion of the upper peripheral wall 10d protrudes radially inward relative to the upper portion, forming a step. The inner peripheral surface of the upper peripheral wall 10d is also provided with a vertical groove (first long vertical groove 10f) located to the left of the first lower step 10e when facing the first lower step 10e as shown in FIG. 3, which extends vertically from the upper end of the upper peripheral wall 10d to the top wall 10a, and a vertical groove (first short vertical groove 10g) located to the right of the first lower step 10e, which extends vertically from the upper end of the upper peripheral wall 10d to the upper surface of the first lower step 10e. The inner circumferential surface of the upper circumferential wall 10d at a portion where the first long vertical groove portion 10f is provided and at a portion where the first short vertical groove portion 10g is provided protrudes radially inward above the first lower step 10e. Hereinafter, this radially inward protruding portion will be referred to as the radial step (first radial step 10h). As will be described later, the head 11 is rotatable about the central axis O, and the inner circumferential surface of the first radial step 10h is formed to contact the outer circumferential surface of a first protrusion 11f (described later) when the head 11 is rotated. The upper surface of the first lower step 10e is provided with an inclined portion (first inclined portion 10j) that increases in height from a portion adjacent to the first long vertical groove 10f toward the first short vertical groove 10g.

[0025] As shown in Fig. 2, the cap 10 of this embodiment has similar structures at locations offset 180° from the central axis O from the locations where the first lower step 10e, first long vertical groove 10f, first short vertical groove 10g, first radial step 10h, and first inclined portion 10j are provided. Hereinafter, these similar structures will be referred to as the second lower step 10k, second long vertical groove 10m, second short vertical groove 10n, second radial step 10p, and second inclined portion 10q. As shown in Fig. 2, the groove widths (circumferential lengths) of the second long vertical groove 10m and second short vertical groove 10n are longer than the groove widths (circumferential lengths) of the first long vertical groove 10f and first short vertical groove 10g.

[0026] The cap 10 further includes elastic pieces 10r extending upward from the upper surface of the top wall 10a as shown in FIG. 1. In this embodiment, a total of six elastic pieces 10r are provided at equal intervals in the circumferential direction as shown in FIG. 2. Each elastic piece 10r in this embodiment is composed of a plate-like elastic piece main body 10s formed to have a triangular shape in a plan view, and a pair of inner reinforcing ribs 10t that are narrower than the elastic piece main body 10s (i.e., have a shorter circumferential length than the elastic piece main body 10s) and are located at both ends of the inner circumferential surface of the elastic piece main body 10s. As shown in FIG. 1, the inner reinforcing ribs 10t extend upward from the top wall 10a with approximately the same radial length up to the center in the longitudinal direction, and then extend at an angle such that the radial length becomes shorter from the center in the longitudinal direction to the upper end.

[0027] As shown in Fig. 1, the head 11 has a cylindrical tubular portion 11a into which the stem 7a is inserted and fitted and held. The upper part of the tubular portion 11a is provided with a top portion 11b whose upper surface is shaped so as to be concave downward and which has a passage therein that leads to the tubular portion 11a. The top portion 11b is provided with a cylindrical nozzle 11c that extends radially outward and leads to a passage provided inside the top portion 11b. The tip of the nozzle 11c is provided with a discharge port 11d through which the content liquid is discharged by the pump-type dispenser 100.

[0028] 1, the head 11 also includes an extension portion 11e that extends downward from the top portion 11b and the nozzle 11c. In this embodiment, the extension portion 11e is cylindrical and has a central axis O. The inner circumferential surface at the lower end of the extension portion 11e is inclined so as to widen radially outward as it extends downward.

[0029] 1 and 2, the head 11 further includes two protrusions protruding radially outward from the lower end of the extension 11e. Here, the protrusion with a smaller circumferential length is referred to as the first protrusion 11f, and the protrusion with a larger circumferential length is referred to as the second protrusion 11g. The head 11 is configured to be circumferentially rotatable relative to the cap 10. The first protrusion 11f moves circumferentially at the locations where the first lower step 10e, the first long vertical groove 10f, the first short vertical groove 10g, the first radial step 10h, and the first inclined portion 10j are provided. The second protrusion 11g moves circumferentially at the locations where the second lower step 10k, the second long vertical groove 10m, the second short vertical groove 10n, the second radial step 10p, and the second inclined portion 10q are provided. Here, the position where the first protrusion portion 11f has rotated circumferentially to the first long vertical groove portion 10f (the position where the second protrusion portion 11g has rotated circumferentially to the second long vertical groove portion 10m) is referred to as the "first rotation position," and the position where the first protrusion portion 11f has rotated circumferentially to the first short vertical groove portion 10g (the position where the second protrusion portion 11g has rotated circumferentially to the second short vertical groove portion 10n) is referred to as the "second rotation position."

[0030] When using the pump-type dispenser 100 configured with these components, the head 11 is rotated to the first rotation position shown in Figures 1 and 2. In this state, the first protrusion 11f and the second protrusion 11g provided on the head 11 are positioned in the first long vertical groove 10f and the second long vertical groove 10m, respectively, and are not supported from below. Meanwhile, because the extension 11e is in contact with the elastic piece 10r, the elastic piece 10r supports the extension 11e from below, while slightly bending due to the weight of the head 11 and the tubular member 7 connected to the head 11 acting on it through the extension 11e, thereby maintaining the head 11 at the height shown in Figure 1 (hereinafter referred to as the "first height").

[0031] When the head 11 is pressed from above to lower it, the stem 7a is pressed down along with the head 11, as shown in FIG. 4. As the stem 7a is pressed down, the connecting tube 5a also descends, releasing the fluid-tight contact between the radially outwardly protruding lower portion of the connecting tube 5a and the lower portion of the inner sliding piece 6c of the piston 6. Further pressing down the head 11 causes the piston 6 to descend along with the tubular member 7 and inner member 5, pressurizing the interior of the cylinder 1. As a result, the liquid in the cylinder 1 passes through the lower end communication port 5d and communication port 5c, passes through the connecting tube 5a, stem 7a, tubular portion 11a, and passages provided inside the top portion 11b, and the inside of the nozzle 11c, and is discharged to the outside through the discharge port 11d. When the head 11 is pressed down and the piston 6 descends below the vent port 1f, a container (not shown) is connected to the outside via the vent port 1f. This prevents the pressure inside the container from becoming negative even if the liquid contained in the container decreases, preventing the container from being deformed or crushed.

[0032] Furthermore, when the head 11 is pressed down, the extension 11e applies a pressing force to the elastic piece 10r, causing the elastic piece 10r to bend radially inward, as shown in FIG. 4. In this embodiment, the inner reinforcing rib 10t is thinner at the upper end than at the lower end (diametric length) connected to the top wall 10a. That is, the upper end of the elastic piece 10r, which begins to bend first due to the extension 11e, is more easily bent than the lower end. Therefore, when the head 11 begins to be pressed, the reaction force from the elastic piece 10r is not excessive, and the operability of the head 11 is not impaired. Furthermore, when a flexible elastic piece such as the elastic piece 10r is repeatedly bent under a relatively large load, it may become worn and lose its restorability. However, in this embodiment, the lower end of the elastic piece 10r is thickened to increase the rigidity of this portion, thereby suppressing the effects of the wear.

[0033] Thereafter, when the pressure on head 11 is released, the elastic force of elastic piece 10r, which has been elastically deformed, acts on head 11, causing head 11 to begin to rise. As a result, the lower part of connecting tube 5a protruding radially outward and the lower part of inner sliding piece 6c come into liquid-tight contact again, and piston 6 rises together with internal member 5, reducing the pressure inside cylinder 1. As a result, valve body 2b moves away from bottom wall 1a, opening suction port 1d, and allowing the liquid in the container to be sucked into cylinder 1 through pipe 4.

[0034] After the discharge of the content liquid is completed, the head 11 is rotated to the second rotation position described above. In this embodiment, the head 11 is rotated clockwise from the state shown in Fig. 2. As a result, the first protrusion 11f located inside the first long vertical groove 10f passes through the first lower step 10e and moves to the first short vertical groove 10g, and the second protrusion 11g located inside the second long vertical groove 10m passes through the second lower step 10k and moves to the second short vertical groove 10n. Here, the height of the upper surface of first lower step 10e is higher than the height of the lower surface of first protrusion 11f located inside first long vertical groove 10f, and similarly, the height of the upper surface of second lower step 10k is higher than the height of the lower surface of second protrusion 11g located inside second long vertical groove 10m. However, in this embodiment, first inclined portion 10j is provided on the upper surface of first lower step 10e, and second inclined portion 10q is provided on the upper surface of second lower step 10k. Therefore, when first protrusion 11f and second protrusion 11g move toward first lower step 10e and second lower step 10k as head 11 rotates, they are guided upward by first inclined portion 10j and second inclined portion 10q, allowing head 11 to rotate smoothly.

[0035] When the head 11 is rotated to the second rotation position in this manner, the lower surface of the first protrusion 11f is supported by the upper surface of the first lower step 10e, and the lower surface of the second protrusion 11g is supported by the upper surface of the second lower step 10k, so that the head 11 is maintained at a height (hereinafter referred to as the "second height") that is higher than the first height (see FIG. 1), as shown in FIG. 5. At this time, the elastic piece 10r is either slightly bent due to slight contact with the extension 11e, or is not bent due to non-contact with the extension 11e. In other words, by rotating the head 11 to the second rotation position, the load on the elastic piece 10r can be reduced (or the load from the extension 11e is not applied to the elastic piece 10r), so that sagging of the elastic piece 10r can be more effectively suppressed.

[0036] Furthermore, when the head 11 is rotated to the second rotation position, the first protrusion 11f and the second protrusion 11g are supported from below by the first lower step 10e and the second lower step 10k, respectively, so that the head 11 cannot be pushed down. This prevents the head 11 from being accidentally pushed down, which can result in the content liquid being accidentally discharged.

[0037] Furthermore, in this embodiment, a first radial step 10h and a second radial step 10p are provided, which come into contact with the outer peripheral surfaces of the first protrusion 11f and the second protrusion 11g, respectively, when the head 11 is rotated. That is, when the head 11 is rotated from the second rotation position to the first rotation position (similarly when the head 11 is rotated from the first rotation position to the second rotation position), resistance is generated between these, which makes it possible to prevent the head 11 from being rotated inadvertently.

[0038] 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, in this embodiment, first inclined portion 10j and second inclined portion 10q are provided on the upper surfaces of first lower step 10e and second lower step 10k, respectively, as the "inclined portion" described above. However, similarly inclined portions may be formed on the lower surfaces of first protrusion 11f and second protrusion 11g, and these may be used as the "inclined portion." The "inclined portion" may be provided on either or both of first lower step 10e, etc. and first protrusion 11f, etc. Furthermore, in this embodiment, two protrusions, first protrusion 11f and second protrusion 11g, are provided, and first lower step 10e, etc. and second lower step 10k, etc., corresponding to the two protrusions are provided. However, the number of protrusions may be one or three or more.

[0039] The pump described above is merely an example, and the present invention also includes cases where other types of pumps are used. The number, positions, and shapes of the elastic pieces 10r, etc. are not limited to those in the above-described embodiment, and can be changed as appropriate.

[0040] (Addendum) This specification discloses the following technology in one aspect. Note that although the reference numerals described below correspond to the reference numerals in the accompanying drawings, they are presented as examples and are not intended to limit the invention of this application.

[0041] (Technology 1) A pump-type dispenser (100) comprising: a cap (10) attached to the mouth of a container containing liquid; a pump held at the mouth by the cap (10) and driven by the up-and-down movement of a stem (7a); and a head (11) connected to the stem (7a) and having a discharge port (11d) for discharging the liquid to the outside, wherein the liquid in the container is discharged from the discharge port (11d) by lowering the head (11) toward the cap (10), the head (11) is rotatable about the central axis (O) of the stem (7a) relative to the cap (10), and has an extension (11e) extending toward the cap (10) and protrusions (11f, 11g) protruding radially outward from the extension (11e); The cap (10) has an elastic piece (10r) that is bent by the extension portion (11e) when the head (11) is lowered, and a peripheral wall (10d) located radially outward of the extension portion (11e), the peripheral wall (10d) has lower step portions (10e, 10k) that are partially provided in the circumferential direction and support lower surfaces of the protrusions (11f, 11g), When the head (11) is rotated to a first rotation position, the lower surfaces of the protrusions (11f, 11g) are not in contact with the lower step portions (10e, 10k), and the head (11) is positioned at a first height where the extension portion (11e) is supported by the elastic piece (10r), When the head (11) is rotated to the second rotation position, the lower surfaces of the protrusions (11f, 11g) are supported by the lower step portions (10e, 10k), and the head (11) is positioned at a second height higher than the first height, in this pump-type dispenser (100).

[0042] With this technology, when the head is rotated to the second rotation position, the extension portion for deflecting the elastic piece rises, thereby reducing the load on the elastic piece (or preventing the load from the extension portion from being applied to the elastic piece), thereby more effectively preventing the elastic piece from sagging.

[0043] (Technology 2) At least one of the upper surface of the lower step portion (10e, 10k) and the lower surface of the protrusion portion (11f, 11g) has an inclined portion (10j) that guides the head (11) from the first height to the second height when the head (11) is rotated from the first rotation position to the second rotation position.

[0044] With this technology, when the head is rotated and raised, the inclined portion guides the head as it rises, allowing the head to rotate smoothly.

[0045] (Technology 3) The pump-type discharger (100) according to Technology 1, wherein the peripheral wall (10d) has radial steps (10h, 10p) that protrude radially inward and come into contact with the outer peripheral surfaces of the protrusions (11f, 11g) when the head (11) rotates between the first rotation position and the second rotation position.

[0046] This technology prevents the head from accidentally rotating between the first and second rotation positions, preventing problems such as accidentally pressing down on the head and accidentally ejecting the contents.

[0047] Although one embodiment of the present invention has been described above, the present invention is not limited to this specific embodiment, and unless otherwise limited in the above description, various modifications and variations are possible within the spirit and scope of the present invention as defined in the claims. For example, the configurations of the above-described embodiment may be added or deleted as appropriate, and the configurations of one embodiment may be incorporated into other embodiments. Furthermore, the effects of the above-described embodiment are merely examples of the effects that can be obtained 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 be obtained in addition to the above-described effects. [Explanation of symbols]

[0048] 1: Cylinder 1a: Bottom wall part 1b: Cylinder wall 1c: Flange wall 1d: Intake port 1e: Holding cylinder 1F: Ventilation duct 2: Valve member 2a: base 2b: Valve body 2c: Connecting piece 4: Pipe 5: Internal parts 5a: Connecting tube 5b: Bottom end 5c: Communication port 5d: Bottom end communication port 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 10d: Upper peripheral wall (peripheral wall) 10e: First lower step (lower step) 10f: First long vertical groove 10g: First short longitudinal groove 10h: First radial step (radial step) 10j: First slope part (slope part) 10k: Second lower step (lower step) 10m: Second long vertical groove 10n: Second short longitudinal groove 10p: Second radial step (radial step) 10q: Second slope part (slope part) 10r: Elastic piece 10s: Elastic piece body 10t: Inner reinforcing rib 11: Head 11a: Cylindrical part 11b: Top 11c: Nozzle 11d: Discharge port 11e: Extension part 11f: First protrusion (protrusion) 11g: Second protrusion (protrusion) 100: Pump type dispenser O: Central axis

Claims

1. A pump-type dispenser comprising: a cap attached to the mouth of a container that contains liquid; a pump that is held at the mouth by the cap and is driven by the up and down movement of a stem; and a head that has a discharge port that discharges the liquid to the outside and is connected to the stem, wherein the liquid in the container is discharged from the discharge port by lowering the head toward the cap, the head is rotatable relative to the cap about a central axis of the stem, and has an extension portion extending toward the cap and a protrusion portion protruding radially outward from the extension portion; the cap has an elastic piece that is bent by the extension portion when the head is lowered, and a peripheral wall that is located radially outward of the extension portion, the peripheral wall has a lower step portion that is partially provided in the circumferential direction and supports a lower surface of the protrusion, When the head is rotated to a first rotation position, a lower surface of the protrusion is not in contact with the lower step portion, and the head is positioned at a first height where the extension portion is supported by the elastic piece, When the head is rotated to a second rotation position, the lower surface of the protrusion is supported by the lower step portion and the head is positioned at a second height higher than the first height.

2. 2. The pump-type dispenser according to claim 1, wherein at least one of an upper surface of the lower step portion and a lower surface of the protrusion has an inclined portion that guides the head from the first height to the second height when the head is rotated from the first rotation position to the second rotation position.

3. 2. The pump-type dispenser according to claim 1, wherein the peripheral wall has a radial step portion that protrudes radially inward and contacts an outer peripheral surface of the protrusion portion when the head rotates between the first rotation position and the second rotation position.

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