Pump, spring, and jetting container

Abstract

The present invention provides a pump that makes it possible to efficiently push up a cylinder by means of a spring made of resin.　A spring of this pump includes first and second ring-shaped members disposed facing each other, two or more flexible columnar members, and a reinforcing member. The columnar members are inclined with respect to the axial direction so as to be curved along the circumferential direction of the first and second ring-shaped members, and both ends of the columnar members are fixed to the first and second ring-shaped members. The angle of the columnar members in the circumferential direction is smaller than 2π. The reinforcing member is disposed between the two or more columnar members, and has a portion fixed to one of the columnar members and another portion fixed to another one of the columnar members. The main plane of the reinforcing member is parallel to the main plane of the first and second ring-shaped members.

Description

Pump, spring and ejection container

[0001] The present invention relates to a pump that is attached to the opening of a container and ejects liquid from the container.

[0002] Pumps that are attached to the opening of a container and spray the liquid inside are generally made mostly of resin, but ball valves and springs are made of metal. Depending on the components of the liquid to be sprayed, the liquid may react with the metal parts and change in quality. In such cases, the liquid's components must be changed to ones that do not react with the metal parts, which causes inconvenience to manufacturers.

[0003] Patent Document 1 discloses a pump that uses a resin spring to push up a piston. Resin springs can prevent corrosion caused by ejected liquid. This resin spring has a structure in which two or more flexible columnar members are arranged between two opposing ring-shaped members. Both the ring members and the columnar members are made of resin. The columnar members are inclined and curved in the circumferential direction of the ring-shaped members, and both ends of the columnar members are fixed to the two ring-shaped members, respectively. The angle between one end of the columnar member and the other end of the ring-shaped members in the circumferential direction is set to be smaller than 2π. By making the angle between one end of the columnar member and the other end smaller than 2π, it is possible to suppress outward expansion of the columnar members when the spring is compressed, and to increase the restoring force of the spring.

[0004] Patent Document 1 also discloses a structure in which a reinforcing member is disposed between two or more columnar members. The reinforcing member is inclined in the opposite direction to the columnar members, and one end is fixed to one of the columnar members and the other end is fixed to another of the columnar members. The reinforcing member further suppresses the outward expansion of the columnar members when the spring is compressed.

[0005] Patent Document 1 also discloses a pump structure in which a resin spring is disposed outside the cylinder.

[0006] International Publication No. 2023 / 149022

[0007] In the resin spring equipped with the reinforcing member of Patent Document 1, the reinforcing member is inclined in the opposite direction to the columnar member, so the reinforcing member also acts as a brace for the columnar member and prevents the columnar member from compressing in the height direction (the axial direction of the spring) when compressed. In other words, the reinforcing member, which suppresses the outward expansion of the columnar member, prevents compression in the height direction, so that the minimum height when force is applied to the spring to compress it is greater than when the reinforcing member is not present. Because the restoring force of a spring is proportional to the difference between its height when no force is applied (natural length) and its height when compressed (compressed length), if the reinforcing member prevents compression in the height direction, it becomes difficult to obtain the restoring force.

[0008] An object of the present invention is to provide a pump in which a piston can be pushed up by a large restoring force of a resin spring.

[0009] To achieve the above object, the spring of the present invention includes first and second ring-shaped members arranged opposite to each other, two or more flexible columnar members, and a reinforcing member. The first and second ring members and the two or more columnar members are all made of resin. The columnar members are curved along the circumferential direction of the first and second ring-shaped members while inclining with respect to the axial direction of the first and second ring-shaped members, and both ends of the columnar members are fixed to the first and second ring-shaped members, respectively. The angle in the circumferential direction of the first and second ring-shaped members from a first fixed position, where one end of the columnar member is fixed to the first ring-shaped member, to a second fixed position, where the other end of the columnar member is fixed to the second ring-shaped member, is less than 2π. The reinforcing member is disposed between the two or more columnar members, with a portion fixed to one of the columnar members and another portion fixed to another of the columnar members. The main plane of the reinforcing member is parallel to the main planes of the first and second ring-shaped members.

[0010] According to the present invention, the piston can be pushed up by the large restoring force of the resin spring.

[0011] (a) A cross-sectional view of a spray container 1 of an embodiment when stationary, and (b) a cross-sectional view when in operation. (a) A side view of a spring 40 of an embodiment, (b) a cross-sectional view of a nozzle 22, and (c) a cross-sectional view of a pump with the spring 40 and nozzle 22 removed. (a) to (f) are six-sided views of the spring 40 of an embodiment, (g) a perspective view, and (h) an A-A cross-sectional view. (a) to (f) are six-sided views of a spring 40 of a modified embodiment, (g) a perspective view, (h) a B-B cross-sectional view, and (i) a C-C cross-sectional view. (a) A cross-sectional view of a spray container of a modified embodiment when stationary, and (b) a cross-sectional view when in operation.

[0012] An embodiment of the present invention will now be described.

[0013] <<<Embodiment 1>>> Figures 1(a) and (b) are overall cross-sectional views of a spray container 1 of embodiment 1, Figure 2(a) schematically shows springs 40 (one-tier and three-tier) of the spray container 1, Figure 2(b) is a cross-sectional view of a nozzle 22, and Figure 2(c) is a cross-sectional view of a pump 2 with the nozzle 22 and spring 40 removed.

[0014] <<Overall Configuration of the Spouting Container 1 >> As shown in FIG. 1 , the spouting container 1 is configured to include a container 10 having an opening 11 and a pump 2 that spouts the contents of the container 10 .

[0015] 2(c), the pump 2 is configured to include a cylinder 30, a piston 20, a cylinder bush 31, a nozzle 22, and a spring 40. All of these are formed from the same resin material.

[0016] The structure of the spring 40 will be described in detail later.

[0017] The cylinder 30 has an opening at the top, and the lower end of the piston 20 is inserted into the opening of the cylinder 30. The piston includes a lower piston 20a, a piston outer cylinder 20b that covers the upper part of the lower piston 20a, and a piston valve 20c that is fixed to the lower part of the piston outer cylinder 20b.

[0018] An annular cylinder bushing 31 covers the space around the piston 20 at the opening of the cylinder 30 .

[0019] The nozzle 22 is attached to the upper end of the piston outer cylinder 20 b of the piston 20 .

[0020] A cylinder 70 is mounted on the top of the annular cylinder bushing 31, forming an annular space around the upper part of the piston 20 that is not inserted into the cylinder 30. A spring 40 that urges the nozzle 22 upward is disposed within the cylinder 70. That is, the piston 20 penetrates the central space of the spring 40. A plurality of springs 40 may be stacked as shown in FIGS. 1( a), 1(b) and 2(a), or only one spring 40 may be used.

[0021] An intake hole 32 is disposed at the bottom end of the cylinder 30 to take in the solution into the cylinder 30. A plate-shaped valve 33 for preventing backflow is disposed in the intake hole 32. A tube 12 is also connected to the intake hole 32.

[0022] A ring-shaped fixture 3 for mounting the pump 2 to the opening 11 of the container 10 is connected to the lower end of the cylinder 70. A seal structure 34 for preventing leakage of the liquid inside the container 10 is provided at the upper end of the outer periphery of the cylinder 30. The seal structure 34 includes a tiny cylindrical member 34a pressed against the inner edge of the opening 11, and a ring-shaped member 34b pressed against the upper end of the edge of the opening 11. The seal structure 34 is made of the same resin material as the cylinder 30, etc.

[0023] <<Spring 40>> The structure of the spring 40 will be described with reference to FIG.

[0024] 3(a) to 3(f) are six-sided views of the spring 40, FIG. 3(g) is a perspective view of the spring 40, and FIG. 3(h) is a cross-sectional view taken along line AA.

[0025] The spring 40 includes first and second ring-shaped members 41 and 42 arranged opposite to each other, and two flexible columnar members 43 and 44. The first and second ring-shaped members 41 and 42, the two columnar members 43 and 44, and the reinforcing member are all made of resin.

[0026] The columnar members 43, 44 are curved in the circumferential direction of the first and second ring-shaped members 41, 42, while inclining with respect to the axial direction of the first and second ring-shaped members, and both ends of the columnar members 43, 44 are fixed to the first and second ring-shaped members 41, 42, respectively.

[0027] The fixed position between one end (upper end) of the columnar member 43 and the first ring-shaped member 41 is referred to as the first fixed position 43a. The fixed position between the other end (lower end) of the columnar member 43 and the second ring-shaped member 42 is referred to as the second fixed position 43b. The angle between the first fixed position 43a and the second fixed position 43b in the circumferential direction of the first and second ring-shaped members is less than 2π. In the case of the spring 40 shown in Figures 3(a) to 3(h), this angle is approximately 180 degrees.

[0028] Similarly, the fixed position between one end (top end) of the columnar member 44 and the first ring-shaped member 41 is referred to as the first fixed position 44a, and the fixed position between the other end (bottom end) of the columnar member 44 and the second ring-shaped member 42 is referred to as the second fixed position 44b. The angle between the first fixed position 44a and the second fixed position 44b in the circumferential direction of the first and second ring-shaped members is less than 2π. In the case of the spring 40 shown in Figures 3(a) to 3(h), this angle is approximately 180 degrees.

[0029] The two columnar members 43 and 44 are arranged at equal intervals in the circumferential direction of the first and second ring-shaped members.

[0030] The reinforcing member 45 is a ring-shaped flat plate, and the radius (inner and outer diameters) of the reinforcing member 45 is equal to the radii (inner and outer diameters) of the first and second ring-shaped members 41, 42. The main plane of the reinforcing member 46 is parallel to the main planes of the first and second ring-shaped members 41, 42.

[0031] The reinforcing member 45 is disposed at an intermediate position between the first ring-shaped member 41 and the second ring-shaped member 42. A portion of the reinforcing member 45 is fixed to the columnar member 43, and another portion is fixed to the columnar member 44 (see FIG. 3( h )). Thus, an arc-shaped region of the reinforcing member 45 having an angle range of approximately 180 degrees is located between the columnar members 43 and 44. The remaining arc-shaped region having an angle range of 180 degrees is located between the columnar members 44 and 43. This prevents the first and second columnar members 43 and 44 from expanding outward beyond the first and second ring-shaped members 41 and 42 when the spring 40 is compressed.

[0032] Furthermore, when no force is applied to the first and second ring-shaped members 41, 42, it is preferable that the distance between the first ring-shaped member 41 and the second ring-shaped member 42 be 1.5 times or less the diameter of the first and second ring-shaped members 41, 42.

[0033] 1A, stacked springs 40 are arranged inside a cylinder 70. The lower surface of the second ring-shaped member 42 of the lowest spring 40 is arranged to contact the upper surface of the annular cylinder bushing 31. The number of stacked springs 40 or the height of the pump 2 is designed so that the upper surface of the first ring-shaped member 41 of the spring 40 contacts part of the nozzle 22 attached to the upper end of the piston 20.

[0034] In order to stably stack the springs 40, it is preferable that the axially outer surfaces of the first and second ring-shaped members 41, 42 (i.e., the upper surface of the first ring-shaped member 41 and the lower surface of the second ring-shaped member 42) are flat. However, in the spring 40 of this embodiment, the axially outer surfaces of the first and second ring-shaped members 41, 42 are not limited to being flat. When multiple springs 40 are stacked, a fitting portion such as a recess or projection may be provided on at least one of the upper surface of the first ring-shaped member 41 and the lower surface of the second ring-shaped member 42 to fit the axially outer surfaces of the first ring-shaped member 41 and the second ring-shaped member 42 that come into contact with each other (i.e., the upper surface of the first ring-shaped member 41 and the lower surface of the second ring-shaped member 42).

[0035] <During Operation> Changes in each part during operation of the pump 2 will be described.

[0036] When the user presses down the nozzle 22 from the rest state shown in Fig. 1(a) as shown in Fig. 1(b), the lower end of the piston 20 to which the nozzle 22 is attached is also pressed down within the cylinder 30. At this time, the stacked springs 40 (40-1 to 40-3) are also compressed.

[0037] When the user releases the nozzle 22, the restoring force of the spring 40 pushes the nozzle 22 upward, returning it to the state shown in FIG. 1(a).

[0038] This expands the space inside the cylinder 30, causing the pressure to drop. The liquid inside the container 10 is sucked up by the pipe 12 connected to the bottom end of the cylinder 30, passes through the intake hole 32 and the valve 33 provided at the bottom end of the cylinder 30, and fills the inside of the cylinder 30.

[0039] 1(b), when the user presses down the nozzle 22 again, the lower end of the piston 20 is pressed down within the cylinder 30, increasing the pressure within the cylinder 30. The liquid within the cylinder passes through the gap between the lower piston 20a and the piston valve 20c, as shown in FIG. 1(b), and further passes between the lower piston 20a and the piston outer cylinder 20b, enters the inside of the piston outer cylinder 20b, and is sprayed out through the nozzle 22.

[0040] When the user releases the nozzle 22, the nozzle 22 is pushed up by the restoring forces of the springs 40-1 to 40-3, which expands the space within the cylinder 30 and reduces the pressure. The liquid within the container 10 fills the cylinder 30 again.

[0041] Thereafter, the steps in FIGS. 1(a) and 1(b) are repeated each time the nozzle 22 is pressed down by the user.

[0042] In this operation, when the spring 40 is compressed, the upper first ring-shaped member 41 approaches the lower second ring-shaped member 42, and the two pillar-shaped members 43, 44 deform so as to be significantly inclined relative to the axial direction of the spring 40. At this time, the ring-shaped reinforcing member 45 prevents the two pillar-shaped members 43, 44 from expanding outward in the radial direction of the spring 40, preventing the compressive force applied to the spring 40 from being used to deform the two pillar-shaped members 43, 44 outward. This allows the compressive force to be used to deform the two pillar-shaped members 43, 44 in the axial direction of the spring.

[0043] On the other hand, because the main plane of the reinforcing member 45 is parallel to the main planes of the first and second ring-shaped members 41, 42 before compression, as long as the two columnar members 43, 44 are equally inclined when compressed, the shape of the reinforcing member 45 is unlikely to deform in the axial direction of the spring 40. Therefore, even if the two columnar members 43, 44 are compressed at an angle, the reinforcing member 45 is unlikely to prevent the columnar members 43, 44 from being compressed at an angle.

[0044] In this way, the spring 40 of this embodiment, which includes a ring-shaped reinforcing member 45, suppresses the two columnar members 43, 44 from expanding and deforming in the diameter direction of the spring 40, while also not hindering the axial deformation of the two columnar members 43, 44. Therefore, compressive force from the user can tilt the two columnar members 43, 44 significantly, bringing the first ring-shaped member 41 and the second ring-shaped member 42 closer together. This allows the spring 40 to be compressed to a smaller height (compressed length) with the same compressive force than a spring with reinforcing members attached at an angle. Because the restoring force of a spring is proportional to the difference between its height when no force is applied (natural length) and its height when compressed (compressed length), the spring 40 of this embodiment can exert a large restoring force. Therefore, the restoring force of the spring 40 can push up the nozzle 22 and suck up liquid.

[0045] The spring 40 of this embodiment is made of resin, and the columnar members 43, 44 are curved so that the angle along the circumferential direction of the ring-shaped member 41 is less than 2π, so the axial length (i.e., height) is shorter than that of a typical coil spring. This allows the pumps 2 to be stacked in any desired number, providing greater freedom in height design.

[0046] In this embodiment, not only the spring 40 but all the components of the pump 2 can be made from the same resin material. For example, all the components of the pump 2 can be made from polypropylene. Therefore, there is no need to separate the components when disposing of the pump 2, making recycling easy.

[0047] As described above, in the ejection container 1 of this embodiment, the spring 40 is not disposed inside the cylinder 30, so there is no risk of the spring 40 being corroded by the liquid. Furthermore, even if the external atmosphere contains a volatile chemical, there is no risk of the spring 40 being corroded because it is made of resin.

[0048] <<<<Modifications of the Spring 40 >>>> Modifications of the spring 40 of the embodiment will be described with reference to FIGS.

[0049] 4(a) to 4(i), the spring 40 of the modified example includes a first arc-shaped reinforcing member 46 and a second arc-shaped reinforcing member 47. One circumferential end of each of the first and second arc-shaped reinforcing members 46, 47 is fixed to the columnar member 44, and the other circumferential end is fixed to the columnar member 43.

[0050] In the height direction (axial direction) of the spring 40, the first reinforcing member 46 is disposed at a position closer to the first ring-shaped member 41 than the intermediate position between the first ring-shaped member 41 and the second ring-shaped member 42. The second reinforcing member 47 is disposed at a position closer to the second ring-shaped member 42 than the intermediate position. The second reinforcing member 47 is disposed so as to face the first reinforcing member 46 in the circumferential direction.

[0051] The radii of the first and second reinforcing members are equal to the radii of the first and second ring-shaped members 41 and 42 .

[0052] The modified spring 40 and the pump using the modified spring 40 can achieve the same effects as the spring and pump of the first embodiment.

[0053] Furthermore, in the modified spring 40, the reinforcing members 46, 47 are divided into two and positioned at offset positions in the height direction of the spring 40, which facilitates the processing of a mold used to manufacture the resin spring 40. This also increases the degree of freedom in the positions at which the reinforcing members 46, 47 are positioned. <<<Modification 1 of Pump 2>>> As Modification 1 of the pump 2, a pump in which the position of the cylinder bush 31 is different from that of the above-described embodiment will be described using Figure 5.

[0054] In the above-described embodiment, the cylinder bush 31 is positioned at the upper end position of the opening of the container 10, but in the modified example of Fig. 5, the springs 40 are positioned a predetermined depth inside the container 10 from the opening of the container. As a result, some of the stacked springs 40 are inserted inside the opening 11 of the container 10. Specifically, in the example of Fig. 5, 10% of the stacked springs 40 from the bottom in the height direction are positioned between the upper end of the opening 11 of the container 10 and the cylinder bush 31, and the remaining 90% are positioned above the upper end of the opening 11 of the container 10.

[0055] In this way, by inserting a portion of the spring 40 into the opening 11 of the container 10, the overall length (height) of the spring 40, including the portion located above the opening 11 of the container 10, can be made longer (higher).

[0056] Compared to a short spring 40, a long spring 40 has a smaller compressed length required to obtain a predetermined restoring force (the force to suck up liquid) relative to the overall length of the spring 40. Therefore, a long spring 40 is less deformed when compressed than a short spring 40, and is less likely to return to its original length after compression even when repeatedly compressed, allowing the spring 40 to maintain its restoring force for a long period of time.

[0057] 5, a second spring 140 made of resin is disposed between the lower end of the nozzle 22 and the upper end of the piston 20. The second spring 140 biases the nozzle 22 upward, and acts to assist the spring 40 in biasing the nozzle 22 upward. The second spring 140 may have the same structure as the spring 40 but a smaller diameter than the spring 40, or may have a general spiral spring structure.

[0058] <<<<Modification 2 of Pump 2>>> In the pump 2 of the embodiment and modification 1 described above, the spring 40 is disposed on the outside of the piston 20, and at least the upper part of the spring 40 is located above the cylinder 30 and the opening 11 of the container 10. However, the pump 2 of the present invention is not limited to this structure.

[0059] For example, the spring 40 may be disposed inside the cylinder 30 and bias the piston 20 upward inside the cylinder 30 .

[0060] As yet another example, the spring 40 may be arranged outside the piston 20, but the entire spring 40 may be located below the opening 11 of the container 10.

[0061] DESCRIPTION OF SYMBOLS 1 Ejection container 2 Pump 3 Fixing device 10 Container 11 Opening 12 Tube 20 Piston 20a Lower piston 20b Piston outer cylinder 20c Piston valve 22 Nozzle 30 Cylinder 31 Cylinder bushing 32 Intake hole 33 Valve 34 Seal structure 34a Member 34b Ring-shaped member 40 Spring 41 Ring-shaped member 42 Ring-shaped member 43 Pillar-shaped member 44 Pillar-shaped member 45 Reinforcing member 46 First reinforcing member 47 Second reinforcing member 70 Cylinder 140 Second spring

Claims

1. A pump mounted on a container, comprising: a cylinder having an opening at an upper portion; a piston having a lower end inserted into the opening of the cylinder; a nozzle mounted on an upper end of the piston; an annular fixture mounted on the opening of the container; and a spring that biases the nozzle or the piston upward. The spring includes a first ring-shaped member and a second ring-shaped member arranged opposite to each other, two or more flexible columnar members, and a reinforcing member. The first ring-shaped member, the second ring-shaped member, and the two or more columnar members are all made of resin. The columnar members are inclined with respect to the axial direction of the first and second ring-shaped members while curving along the circumferential direction in the circumferential direction of the first ring-shaped member and the second ring-shaped member. Both ends of the columnar members are respectively fixed to the first ring-shaped member and the second ring-shaped member. The circumferential angle of the first ring-shaped member and the second ring-shaped member from a first fixing position, which is a fixing position of one end of the columnar member and the first ring-shaped member, to a second fixing position, which is a fixing position of the other end of the columnar member and the second ring-shaped member, is smaller than 2π. The reinforcing member is arranged between two or more of the columnar members, with a part fixed to one of the columnar members and another part fixed to another one of the columnar members. A main plane of the reinforcing member is parallel to main planes of the first ring-shaped member and the second ring-shaped member. A pump characterized by the above.

2. The pump according to claim 1, wherein the reinforcing member is ring-shaped. A pump characterized by the above.

3. The pump according to claim 1, wherein a radius of the ring-shaped reinforcing member is equal to radii of the first ring-shaped member and the second ring-shaped member. A pump characterized by the above.

4. The pump according to claim 1, wherein the ring-shaped reinforcing member is arranged at an intermediate position between the first ring-shaped member and the second ring-shaped member. A pump characterized by the above.

5. The pump according to claim 1, wherein the reinforcing member is an arc-shaped member, with one end in the circumferential direction fixed to one of the columnar members and the other end fixed to another one of the columnar members. A pump characterized by the above.

6. The pump according to claim 5, wherein there are two of the columnar members, and there are two arc-shaped reinforcing members, namely a first reinforcing member and a second reinforcing member, the first reinforcing member is disposed at a position closer to the first ring-shaped member than the intermediate position between the first ring-shaped member and the second ring-shaped member, the second reinforcing member is disposed at a position closer to the second ring-shaped member than the intermediate position, and the second reinforcing member is disposed so as to face the first reinforcing member in the circumferential direction. A pump characterized by the above.

7. The pump according to claim 5, wherein the radius of the arc-shaped reinforcing member is equal to the radii of the first ring-shaped member and the second ring-shaped member. A pump characterized by the above.

8. A pump mounted on a container, comprising: a cylinder having an opening at an upper portion; a piston with a lower end inserted into the opening of the cylinder; an annular cylinder bush covering a space around the piston at the opening position of the cylinder or inside the opening of the cylinder; a nozzle mounted on an upper end of the piston; a cylinder forming an annular space around an upper portion of the piston not inserted into the cylinder; and an annular fixture connected to a lower end of the cylinder and mounted on an opening of the container. The cylinder is disposed inside the container closer to the inside of the container than the opening of the container, and the cylinder bush is located at the opening position of the container or inside the container by a predetermined depth from the opening of the container. In the annular space in the cylinder between an upper surface of the cylinder bush and the nozzle, one spring or two or more stacked springs are disposed, and the spring biases the nozzle upward. The spring includes: a first ring-shaped member and a second ring-shaped member disposed opposite to each other; two or more flexible columnar members; and a reinforcing member. The first ring-shaped member, the second ring-shaped member, and the two or more columnar members are all made of resin. The columnar members are inclined with respect to an axial direction of the first ring-shaped member and the second ring-shaped member while curving along the circumferential direction in the circumferential direction of the first ring-shaped member and the second ring-shaped member, and both ends of the columnar members are respectively fixed to the first ring-shaped member and the second ring-shaped member. An angle in the circumferential direction of the first ring-shaped member and the second ring-shaped member from a first fixing position, which is a fixing position of one end of the columnar member and the first ring-shaped member, to a second fixing position, which is a fixing position of the other end of the columnar member and the second ring-shaped member, is smaller than 2π. The reinforcing member is disposed between two or more of the columnar members, with a part fixed to one of the columnar members and another part fixed to another one of the columnar members. A main plane of the reinforcing member is parallel to main planes of the first ring-shaped member and the second ring-shaped member. A pump characterized by the above is provided.

9. The pump according to claim 8, wherein the lower surface of the single spring or the second ring-shaped member located at the bottom of the two or more stacked springs is in contact with the upper surface of the cylinder bush, and the upper surface of the first ring-shaped member located at the top is in contact with a part of the nozzle.

10. The pump according to claim 8, wherein an intake hole for taking a solution into the cylinder is arranged at the lower end of the cylinder, a plate-shaped valve for preventing backflow is arranged in the intake hole, and the valve is made of resin.

11. A spring including a first ring-shaped member and a second ring-shaped member arranged opposite to each other, two or more flexible columnar members, and a reinforcing member, wherein the first ring-shaped member, the second ring-shaped member, the two or more columnar members, and the reinforcing member are all made of resin, the columnar members are inclined with respect to the axial direction of the first ring-shaped member and the second ring-shaped member while curving along the circumferential direction in the circumferential direction of the first ring-shaped member and the second ring-shaped member, both ends of the columnar members are respectively fixed to the first ring-shaped member and the second ring-shaped member, the circumferential angle of the first ring-shaped member and the second ring-shaped member from the first fixing position which is the fixing position of one end of the columnar member and the first ring-shaped member to the second fixing position which is the fixing position of the other end of the columnar member and the second ring-shaped member is smaller than 2π, the reinforcing member is arranged between two or more of the columnar members, a part of the reinforcing member is fixed to one of the columnar members, and the other part of the reinforcing member is fixed to another one of the columnar members, and the main plane of the reinforcing member is parallel to the main planes of the first ring-shaped member and the second ring-shaped member.

12. A jetting container having a container with an opening and a pump attached to the opening of the container, wherein the pump is the pump according to claim 1 or 8.

Images