Separately disposable ejection container and content ejection unit

Abstract

Provided is a spray container which, after the contents therein have been used, can be separated by removing a pump from the container with a small amount of force.　An engaging part is disposed around a button of a pump unit such that, by pressing the button, it is possible to press a fastening ring where the pump unit is caulked to a neck-shaped part of the container. Therefore, the pump unit can be removed from the neck-shaped part of the container after all of the contents in the spray container have been used.

Description

[Technical field]

[0001] The present invention relates to a structure in which a pump that is attached to the opening of a container and sprays the contents inside the container cannot be removed from the container during use, but can be removed from the container after use so that the container and the pump can be separated. [Background technology]

[0002] A widely used spray container has a pump attached to the opening of a container that stores a content. When such a spray container is operated by, for example, pushing down the pump, the content in the container is sucked up by the action of the pump pressure and sprayed out from a hole at the tip of the pump. A spray container with a structure in which a spray unit is detachably attached to the container by a screw connection or the like so that the content can be refilled or replaced is known.

[0003] On the other hand, in the fields of perfume, cosmetics, and medicines, there are also known structures in which the pump cannot be removed from the container for reasons such as maintaining the quality of the contents. For example, there are spray containers on the market in which a part of the pump is pressed around the opening of the container by applying force to it to cause plastic deformation.

[0004] Patent Document 1 proposes a structure in which a ring-shaped member that fixes the pump to the neck of the container has a weak part (breaking means) in order to recycle the pump (dispenser) after use. It states that this allows an operator to quickly and cleanly remove the dispenser from the container by breaking the weak part of the ring-shaped member. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2012-511480 A Summary of the Invention [Problem to be solved by the invention]

[0006] In recent years, there has been a trend to thoroughly separate garbage by material for recycling. Even for spray containers in which the spray unit cannot be removed from the container, if the container and the spray unit are made of different materials (e.g., glass and metal, glass and resin, metal and resin, etc.), the spray unit must be removed from the container and disposed of after use. For this reason, users (consumers) sometimes use pliers to pry the spray unit open from the neck of the container and dispose of it.

[0007] In the spray container disclosed in Patent Document 1, an operator can apply force to break a part of a ring-shaped member to remove the dispenser (pump) from the container. However, when a user (consumer) removes the dispenser from the container by himself / herself, the task of breaking the ring-shaped member is not easy for a user with weak strength.

[0008] An object of the present invention is to provide a spray container which allows the pump to be removed from the container with little force and separated after the contents have been used. [Means for solving the problem]

[0009] In order to achieve the above object, the ejection container of the present invention includes a container having a neck-shaped portion around an opening, a pump unit for ejecting the contents of the container, and a fixture for fixing the pump unit to the neck-shaped portion. The pump unit includes a cylinder having a portion inserted into the opening, a piston having one end inserted into the cylinder, a button attached to the other end of the piston for pushing the piston into the cylinder, and a support ring arranged to cover the outer periphery of the neck-shaped portion of the opening in an annular shape and support the cylinder at the edge of the opening. The fixture includes a fastening ring arranged so that its inner circumferential surface contacts the outer circumferential surface of the support ring, and a fixed ring arranged so that it contacts the outer circumferential surface of the fastening ring. The fastening ring and the fixed ring are provided with a locking mechanism for fixing the support ring to the neck-shaped portion. A portion of the button or the piston is provided with an engagement portion that engages with the fastening ring at a predetermined angle when the button or the piston is rotated around its axis. The locking mechanism is structured to be released when the button is pushed in while the button or part of the piston is engaged with the fastening ring by the engagement portion, and the pump unit becomes removable from the neck-shaped portion of the container. Effect of the Invention

[0010] According to the present invention, it is possible to provide a spray container which allows the pump to be removed from the container with a small force after the content has been used, and the container can be separated. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a cross-sectional view of a jetting container 1 according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an enlarged cross-sectional view of an upper portion of the jetting container 1 according to the embodiment of the present invention. [Diagram 3] FIG. 2 is a perspective view of a pump unit 20 according to the embodiment. [Figure 4] 3A is a perspective view of a button 23 according to an embodiment, FIG. 3B is a top view thereof, and FIG. 3C is a front view of a first protrusion thereof. [Diagram 5] 4A is a top view of a fastening ring 31 according to an embodiment, and FIG. 4B is a front view of a second protrusion. [Figure 6]10(a-1) to 10(d) are cross-sectional views showing a procedure for removing the pump unit 20 of the jetting container according to the embodiment. [Figure 7] FIG. 2 is an enlarged cross-sectional view of the jetting container 1 according to the embodiment of the present invention with the fastening ring 31 pressed down. [Figure 8] 6(a) to 6(c) are explanatory views showing the movement of a first protrusion 28 and a second protrusion 29 when they collide with each other during the manufacture of the jetting container of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, a disposable jetting container 1 according to an embodiment of the present invention will be described.

[0013] Fig. 1 is a cross-sectional view of the entire jetting container 1, and Fig. 2 is an enlarged cross-sectional view of an upper portion of the jetting container 1. Fig. 3 is a perspective view of the pump unit 20.

[0014] 1, the ejection container 1 of this embodiment is configured to include a container 10 having a neck-shaped portion 12 around an opening 11, a pump unit 20 that ejects the contents of the container 10, and a fixture 30 that fixes the pump unit 20 to the neck-shaped portion 12 of the container 10. The pump unit 20 and the fixture 30 configure a contents ejection unit that ejects the contents in the container 10.

[0015] As shown in Figures 2 and 3, the pump unit 20 comprises a cylinder 21 whose lower portion is inserted inside the opening 11 of the container 10, a piston 22 whose tip 22a is inserted into the cylinder 21, and a button 23 fixed to the rear end 22b of the piston 22.

[0016] An elastic member (double springs 24a, 24b in this embodiment) is disposed around the piston 22, and supports the piston 22b against the cylinder 21 while biasing it.

[0017] At the tip (lower end) of the cylinder 21, a through-hole 21b is provided, and the through-hole 21b is covered by a check valve 21c. Also, a pipe 21d for sucking up the contents of the container 10 is inserted into the through-hole 21b. Further, a cylinder inner cylinder 21e is fixed to the upper end of the cylinder 21.

[0018] The button 23 is provided with a jet outlet 25. Here, around the piston 22, piston outer cylinders 22c, 22d are arranged so as to surround the piston 22, and the piston 22 is fixed to the button 23 via the piston outer cylinder 22c. A minute gap 22e is provided between the outer peripheral surface of the piston 22 and the piston outer cylinders 22c, 55d, and this gap 22e serves as a flow path for guiding the contents of the container 10 from the space 21a of the cylinder 21 to the button 23.

[0019] Also, the piston outer cylinder 22c isolates the springs 24a, 24b from the piston 22, and is configured such that the springs 24a, 24b do not come into contact with the contents of the container 10.

[0020] Inside the button 23, a flow path 23a for guiding the contents that have reached through the gap 22b of the piston 22 to the jet outlet 25 is provided.

[0021] At the upper end of the cylinder 21, a support ring 26 is fixed via the cylinder inner cylinder 21e. The support ring 26 has a shape that annularly covers the outer periphery of the neck-shaped portion 12 from the edge of the opening 11. The support ring 26 is connected to the cylinder 21 inner cylinder e and the outer peripheral surface of the cylinder 21 at the upper part of the edge of the opening 11, and supports the cylinder 21 above the edge of the opening 11. Here, an opening 11 A packing 27 is arranged between the upper part of the edge of the opening and the support ring 26.

[0022] At the neck-shaped portion 12 of the container 10, an edge portion 12a projects outward in a ring shape, and a concave portion 12b (radial depth A) is provided at the lower part of the edge portion 12a. At the lower end of the support ring 26, a convex portion 26a (radial height B (B < A)) that engages with the concave portion 12b is provided on the inner peripheral surface side.

[0023] The fixture 30 includes a fastening ring 31 arranged such that its inner peripheral surface is in contact with the outer peripheral surface of the support ring 26, and a fixed ring 32 arranged on the outside of the fastening ring 31. The fastening ring 31 and the fixed ring 32 include a locking mechanism 40 that fixes the support ring 26 to the neck-shaped portion 12.

[0024] Here, as an example, the lock mechanism 40 includes a convex portion 26c (or a concave portion) provided on the outer peripheral surface of the support ring 26, and a concave portion 31c (or a convex portion) provided on the inner peripheral surface of the fastening ring 31 at a position corresponding to the convex portion 26c (or a concave portion). The convex portion 26c (or a concave portion) of the support ring engages with the concave portion 31c (or a convex portion) on the inner peripheral surface of the fastening ring 31, so that the lock mechanism 40 is in a locked state. In addition, a pressing convex portion 31d is provided on the outer peripheral surface of the fastening ring 31 at the same position as the concave portion 31c. The fixed ring 32 is disposed so as to contact the pressing convex portion 31d of the fastening ring 31, and the fastening ring 31 is pressed against the support ring 26 to be crimped, so that the convex portion 26c and the concave portion 31c firmly engage with each other to maintain the locked state, and the support ring 26 is fixed to the neck-shaped portion 12.

[0025] 3, the support ring 26 is provided with one or more notches 26b in the axial direction. Due to the provision of the notches 26b, the support ring 26 is deformed and narrowed in the radial direction when it is crimped by the fastening ring 31, and is firmly fixed to the neck-shaped portion 12.

[0026] In this embodiment, the projections and recesses 31c, 26c and the pressing protrusion 31d are provided in a ring shape along the circumferential direction of the inner circumferential surface of the fastening ring 31 and the outer circumferential surface of the support ring 26.

[0027] To explain each part of the locking mechanism 40 in more detail, the pressing protrusion 31d comes into contact with the fixed ring 32, so that the fastening ring 31 is pressed against the support ring 26, and is pressed by the pressing protrusion 31d, so that the concave and convex portions 31c and 26c fit together, increasing the strength with which the support ring 26 is crimped. In addition, the convex portion 26c of the support ring 26 fits together with the concave portion 31c of the fastening ring 31, so that the support ring 26 cannot move upward in the axial direction. In this way, the locking mechanism 40 prevents the support ring 26 from coming off the neck-shaped portion 12.

[0028] In addition, the lower end of the fastening ring 31 is at the same height as the lower end of the support ring 26 and has a protrusion 31a (height C in the radial direction) that protrudes toward the inner circumferential surface side. a is thicker than the gap between the protrusion 31a of the fastening ring 31 and the neck-shaped portion 12, 2 6 cannot pass between the convex portion 31a of the fastening ring 31 and the neck-shaped portion 12. This realizes a structure that further firmly prevents the support ring 26 from moving upward in the axial direction.

[0029] In this way, the support ring 26 is not only pressed against the neck portion 12 by the fastening ring 31 but also prevented from moving in the axial direction by the locking mechanism 40 and is fixed to the neck portion 12 .

[0030] On the other hand, a part of any of the button 23, the piston 22 and the piston outer cylinder 22c is provided with an engagement portion 28 that engages with the fastening ring 31 at a predetermined angle when the button 23, the piston 22 or the piston outer cylinder 22c is rotated around its axis.

[0031] Here, an example will be described in which engagement portion 28 is provided at the lower end of the outer circumferential surface of button 23, as shown in Fig. 4(a). Button 23 is attached to piston 22 and piston outer cylinder 22c so as to be rotatable about its axis, and button 23 is provided with a first protrusion (hereinafter referred to as first protrusion 28) as engagement portion 28, protruding outward from the lower end of the outer circumferential surface of button 23 (see Fig. 4(b)).

[0032] fastening ring 31 As shown in FIG. 2, the fastening ring 11 has a height that reaches above the opening 11 of the container 10. 31 As shown in FIGS. 5(a) and 5(b), a second projection 29 having a shape capable of engaging with the first projection 28 is provided on the inner peripheral surface of the first projection 28. As shown in FIG.

[0033] Therefore, when the user rotates the button 23 as shown in Figures 6(a-1) and (a-2) to engage the first protrusion 28 and the second protrusion 29 as shown in Figures 6(b-1) and (b-2), and then presses the button 23 in this state, the fastening ring 31 is pushed axially downward from between the support ring 26 and the fixed ring 32 (see Figures 6(a-2) and (b-2)).

[0034] As a result, as shown in FIG. Department 31c is a protrusion of the support ring 26 Department 26c and displaces in the axial direction, and the fitted state is released. Department Since the pressing protrusion 31d at the same position as 31c moves to the position of the recess 12b below the edge 12a of the neck-shaped portion 12, even if the pressing protrusion 31d comes into contact with the fixed ring 32, there is no support ring 26 inside that position, and therefore the support ring 26 is released from the clamping force applied by the fixed ring 32 to the support ring 26. This allows the fixed ring 32 to be removed upward, as shown in FIG. 6(c), and the support ring 26 to be removed from the neck-shaped portion 12 of the container 10.

[0035] This allows the pump unit 20 after use to be removed from the container 10 and disposed of separately.

[0036] In addition, since the fastening ring 31 remains attached to the removed pump unit 20 in the lowered state, even if the fixing ring 32 is put on, the fastening ring 31 cannot swage the support ring 26, and the pump unit 20 cannot be fixed to the container 10 again. This makes it difficult to replace the contents of the container 10 and reinstall the pump. unit20 can be fixed to prevent reuse, and the quality of the contents of the ejection container 1 can be guaranteed.

[0037] Here, the engagement portion 28 will be further described.

[0038] As shown in Figures 4(b) and 5(a), the first protrusions 28 of the engagement portion are provided at regular intervals (here, every 90 degrees) in the circumferential direction on the outer circumferential surface of the button 23, and the second protrusions 29 are provided at positions corresponding to the first protrusions 28 on the inner circumferential surface of the fastening ring.

[0039] In addition, so that the first and second protrusions 28, 29 can engage with each other, one (here, the second protrusion 29) has a recess 29a in the circumferential direction, and the other (here, the first protrusion 28) has a shape (here, a diamond shape) that fits into the recess 29a.

[0040] Moreover, as shown in Fig. 6(a-1) and Fig. 6(b-1), the first and second protrusions 28, 29 are desirably shaped such that, when the button 23 is rotated, the first protrusion 28 is inserted into and fitted into the recess 29a of the second protrusion 29 at a certain rotation angle, and when the button 23 is further rotated, the first protrusion 28 overcomes and escapes from the recess 29a of the second protrusion 29. Specifically, for example, the cross-sectional shape of the first protrusion 28 parallel to the outer peripheral surface of the button is desirably a diamond of a size that allows the first protrusion 28 to be inserted into the recess 29a of the second protrusion 29. In this way, when the button 23 is rotated to move the diamond-shaped first protrusion 28 in the circumferential direction, the first protrusion 28 can be easily inserted into the recess 29a regardless of the direction of rotation, and can be easily escaped from the recess 29a by further rotating.

[0041] In this way, by configuring the first protrusion 28 and the second protrusion 29 to change from a disengaged state to an engaged state and back to a disengaged state as the button 23 is rotated, even if the user rotates the button 23 during use to engage the first protrusion 28 and the second protrusion 29, the button 23 can be further rotated to easily return to the used state. This prevents the pump from accidentally falling out of the container 10 during use. unit This will help prevent you from missing the 20.

[0042] Moreover, it is desirable that the second protrusion 29 provided on the fastening ring 31 has a bottom surface shape on the axial lower side that is inclined in the circumferential direction of the fastening ring 31. For example, it is desirable that the outer shape of the second protrusion 29 in a cross section parallel to the inner peripheral surface of the fastening ring 31 is a rhombus with a recess 29a cut out on the upper surface, as shown in Figures 5(b) and 6(a-1).

[0043] By making the shape as described above, even if the second protrusion 29 is pushed in from just above the first protrusion 28 as shown in Figs. 8(a) to (c) when the fastening ring 31 is pressed into the outside of the support ring 12 from above after the pump unit 20 is attached to the neck portion 12 of the container 10 during manufacturing, the bottom surface of the second protrusion 29 moves in the circumferential direction so as to slide over the top surface of the first protrusion 28, since the bottom surface of the second protrusion 29 is inclined. This makes it possible to prevent the first protrusion 28 or the second protrusion 29 from being damaged during manufacturing. This makes it possible to improve the yield.

[0044] The fixed ring 32 is preferably made of a material that is difficult to deform, such as resin, metal, or glass. The support ring 26 is preferably made of a material such as resin or metal so that it can be deformed. 31The material of the parts may be any material that can lock the movement of the support ring 26 by engaging with the support ring 26 through the projections and recesses, and can move over the projections and recesses to release the lock when the button 23 is pressed down, and may be, for example, a resin or metal. The resin for each of the above parts may be polypropylene or polyethylene.

[0045] Furthermore, by providing a groove in the axial direction on the inner peripheral surface of the fixed ring 32, the fastening ring 31 can be smoothly pressed down in the axial direction.

[0046] Here, the operation of each part when using the jetting container 1 of this embodiment and the series of operations when removing the pump unit 20 after use will be described.

[0047] In use, when a user presses the button 23, the piston 22 is pressed down in a direction that compresses the springs 24a and 24b, and the tip 22a of the piston 22 compresses the space 21a within the cylinder 21.

[0048] After that, when the user releases the button 23, the springs 24a and 24b expand and return to their original positions, so that the space 21 a The pressure in the cylinder 21 is reduced, and the contents of the container 10 are sucked into the space 21 in the cylinder 21 through the pipe 21d and the through hole 21b. a The check valve 21c fills the space 21 a This prevents the contents from flowing back into the container 10.

[0049] When the user presses the button 23 again, the piston 22 is pushed down in a direction that compresses the springs 24a and 24b, and the space 21 filled with the contents is compressed. a When compressed, the space 21 a The pressure in the cylinder 21 rises, and the contents of the space 21a in the cylinder 21 are 1 The liquid passes through the gap between outer cylinder 22c and button 23, and then passes through flow path 23a in the button to be ejected from ejection port 25a.

[0050] When all the contents have been sprayed out and are gone, the user removes the pump unit 20 from the container 10 in order to separate and dispose of the spray container 1. Specifically, as shown in Figures 6(a-1) and (a-2), the user first rotates the button 23 to align and fit the first protrusion 28 on the outer periphery of the button 23 into the recess 29a of the second protrusion 29 of the fastening ring 31 (Figures 6(b-1) and (b-2)).

[0051] In this state, when the user presses the button 23 downward, the fastening ring 31 is pushed downward and the clamping force from the fixed ring 32 to the support ring 26 is no longer applied, so that the fixed ring 32 can be removed upward as shown in Fig. 6(c). After removing the fixed ring 32 upward, the user removes the pump unit 20 from the container 10 with the fastening ring 31 still attached.

[0052] As a result, even if the container 10 and the pump unit are made of different materials, they can be disposed of separately.

[0053] Furthermore, the act of pressing down button 23 for separation requires a greater force than the force required to press button 23 during use, but button 23 is originally designed to be pressed down, and the force of the user can be efficiently transmitted to fastening ring 31. Furthermore, fastening ring 31 can be pressed down while maintaining its shape, so that fastening ring 31 can be pressed down with less force than would be required to break it, and pump unit 20 can be removed.

[0054] In this way, according to this embodiment, it is possible to provide a spray container 1 which allows the pump unit 20 to be removed from the container 10 with a small force and separated after the contents have been used.

[0055] In the above-described embodiment, the lock mechanism 40 is provided with a ring-shaped convex portion 26c on the support ring 26 and a ring-shaped concave portion 31c on the fastening ring 31, and the lock is released when the button 23 is pressed down to push the fastening ring 31 down over the concave portions, but the present invention is not limited to such a lock mechanism 40. Any structure may be used as long as the lock can be released when the button 23 is pressed down. For example, the fastening ring 31 may have a structure such as a pin instead of a ring shape, and may be locked by engaging with the support ring 26. In this case, too, by using a structure in which the pin is released from engagement with the support ring 26 when the button 23 is pressed down, a mechanism can be realized in which the lock is released when the button 23 is pressed down, and the pump unit 20 can be removed. [Explanation of symbols]

[0056] 1...ejection container, 10...container, 11...opening, 12...neck-shaped portion, 20...pump unit, 21...cylinder, 22...piston, 22c...piston outer cylinder, 23...button, 23a...flow path, 24a, 24b...spring, 25...ejection port, 26...support ring, 27...packing, 28...engagement portion (first protrusion), 29...second protrusion, 30...fixing device, 31...fastening ring, 32...fixing ring

Claims

1. A container having a neck-shaped portion around an opening, a pump unit for ejecting the contents of the container, and a fixture for fixing the pump unit to the neck-shaped portion, the pump unit includes a cylinder having a portion inserted into the opening, a piston having one end inserted into the cylinder, a button attached to the other end of the piston for pushing the piston into the cylinder, and a support ring arranged to cover at least a portion of an outer periphery of a neck-shaped portion of the opening and supporting the cylinder at an edge of the opening; The fastening device includes a fastening ring arranged such that an inner peripheral surface of the fastening ring is in contact with an outer peripheral surface of the support ring, and a fixed ring arranged such that the inner peripheral surface of the fastening ring is in contact with an outer peripheral surface of the fastening ring, The fastening ring and the fixed ring each include a locking mechanism for fixing the support ring to the neck-shaped portion, a part of the button or the piston is provided with an engagement portion that engages with the fastening ring at a predetermined angle when the button or the piston is rotated around its axis, The locking mechanism is structured to be released when the button is pressed while the button or a portion of the piston is engaged with the fastening ring by the engagement portion, and the pump unit is removable from the neck-shaped portion of the container.

2. 2. The ejection container according to claim 1, wherein the locking mechanism is configured such that when the button is pushed in with the button or a portion of the piston engaged with the fastening ring by the engagement portion, the fastening ring is pushed out axially from between the support ring and the fixed ring, thereby making it possible to remove the pump unit from the neck-shaped portion of the container.

3. 3. The jetting container according to claim 1, wherein the support ring is provided with one or more notches in the axial direction.

4. 4. The ejection container according to claim 1, wherein the button is attached to the piston so as to be rotatable about an axis. the button includes a first protrusion as the engagement portion, the first protrusion protruding outward from an outer circumferential surface of the button; An ejection container characterized in that the fastening ring is positioned above the opening of the container, and the inner surface of the fastening ring above the opening is provided with a second protrusion that can engage with the first protrusion.

5. 5. The ejection container according to claim 4, wherein the first protrusions are provided in a plurality of portions at regular intervals in the circumferential direction on the outer peripheral surface of the button, and the second protrusions are provided at positions corresponding to the first protrusions on the inner peripheral surface of the fastening ring.

6. 6. The jetting container according to claim 4, wherein one of the first and second projections has a recess in the circumferential direction, and the other has a shape that fits into the recess.

7. 7. A spray container as described in claim 6, characterized in that the first and second protrusions are shaped such that, when the button is rotated, the other protrusion is inserted and fitted into the recess of the one at a certain rotation angle, and when the button is further rotated, the other protrusion escapes from the recess of the one.

8. 7. The ejection container according to claim 6, wherein the second protrusion provided on the fastening ring has a bottom surface shape on the axial lower side that is inclined in the circumferential direction of the fastening ring.

9. 9. The ejection container according to claim 8, wherein the second protrusion has a rhombus-shaped cross-sectional shape parallel to the inner peripheral surface of the fastening ring, and the recess is cut out in the upper surface of the rhombus-shaped cross-sectional shape.

10. 9. The spray container according to claim 8, wherein the first protrusion has a rhombic cross-sectional shape parallel to the outer peripheral surface of the button that is sized so that it can be inserted into the recess of the second protrusion.

11. 11. The ejection container according to claim 1, wherein the locking mechanism includes a convex portion or a concave portion provided on an outer peripheral surface of the support ring, and a concave portion or a convex portion provided on an inner peripheral surface of the fastening ring at a position corresponding to the convex portion or the concave portion, and the locking mechanism is brought into a locked state by the convex portion or the concave portion of the support ring engaging with the concave portion or the convex portion on the inner peripheral surface of the fastening ring, An ejection container characterized in that when the button is pushed in while the button or the piston is engaged with the fastening ring by the engagement portion, the fastening ring is pushed axially downward over the convex portion or concave portion of the support ring, thereby releasing the locked state.

12. 12. The ejection container according to claim 11, wherein the convex or concave portion of the support ring and the concave or convex portion of the fastening ring are arranged in a ring shape along the circumferential direction of the outer circumferential surface of the support ring and the inner circumferential surface of the fastening ring.

13. 13. A spray container as described in claim 11 or 12, characterized in that a pressing convex portion is further provided on the outer peripheral surface of the fastening ring, and the fastening ring is pressed against the support ring by the pressing convex portion contacting the fixed ring.

14. A pump unit for ejecting the contents of a container having a neck-shaped portion around an opening thereof, and a fixture for fixing the pump unit to the neck-shaped portion, the pump unit includes a cylinder having a portion inserted into the opening, a piston having one end inserted into the cylinder, a button attached to the other end of the piston for pushing the piston into the cylinder, and a support ring arranged to cover at least a portion of an outer periphery of a neck-shaped portion of the opening and supporting the cylinder at an edge of the opening; The fastening device includes a fastening ring arranged such that an inner peripheral surface of the fastening ring is in contact with an outer peripheral surface of the support ring, and a fixed ring arranged such that the inner peripheral surface of the fastening ring is in contact with an outer peripheral surface of the fastening ring, The fastening ring and the fixed ring each include a locking mechanism for fixing the support ring to the neck-shaped portion, a part of the button or the piston is provided with an engagement portion that engages with the fastening ring at a predetermined angle when the button or the piston is rotated around its axis, The locking mechanism is structured to be released when the button is pressed while the button or a part of the piston is engaged with the fastening ring by the engagement portion, and the pump unit is removable from the neck-shaped portion of the container, characterized in that the locking mechanism is structured to be released when the button is pressed while the button or a part of the piston is engaged with the fastening ring by the engagement portion, and the pump unit is removable from the neck-shaped portion of the container.

Images