Self-sealing cap and press pump

Abstract

The utility model discloses a kind of self-sealing head cap and press pump, the self-sealing head cap includes head cap and self-sealing mechanism, the self-sealing mechanism includes elastic support body and self-sealing rod, the elastic support body includes outer end assembly ring, inner end assembly ring and the elastic part extended between the outer end assembly ring and the inner end assembly ring, the outer end assembly ring has first ring hole, the self-sealing rod includes stem and the plugging cap being arranged at the outer end of the stem, the inner diameter size of the first ring hole of the outer end assembly ring is greater than the outer diameter size of the stem and less than the outer diameter size of the plugging cap, the inner end of the stem is installed in the inner end assembly ring after passing the first ring hole of the outer end assembly ring, the outer end assembly ring is installed in the head cap, the first ring hole of the outer end assembly ring and the head cap channel of the head cap are communicated, the elastic part and the inner end assembly ring are located in the head cap channel of the head cap, in natural state, the elastic part makes the plugging cap close the first ring hole of the outer end assembly ring.

Description

Technical Field

[0001] This utility model relates to a press pump, and more particularly to a self-sealing cap and a press pump. Background Technology

[0002] A push-button pump is a device used to pump out fluidized substances such as cosmetics and toiletries contained in a bottle. For example, in Chinese utility model patent CN216710210U, the inventors disclosed a self-sealing push-button dispensing device, which is fixedly connected to a pump body assembly. Taking the usage state as the directional reference, the self-sealing push-button dispensing device includes a button body with an internal dispensing chamber. A nozzle communicating with the outside is fixedly provided on the side end face of the button body. A plug is positioned in the dispensing chamber inside the button body. A limiting rod with a central axis perpendicular to the central axis of the plug is fixedly connected to the end of the pump body assembly. The limiting rod communicates the inside of the pump body assembly with the inside of the nozzle. The end of the limiting rod slides in a beveled manner with the plug, allowing the plug to elastically extend and retract along the axial direction of the nozzle. The plug has an avoidance state that opens the nozzle and a sealing state that closes the nozzle. While existing self-sealing push-button discharge devices can achieve self-sealing of the nozzle, they suffer from drawbacks such as complex structure and high cost. Specifically, they require a limiting rod end and a beveled plug to slide together to allow the plug to elastically extend and retract along the nozzle axis. Furthermore, since the top of the limiting rod is fitted into the discharge chamber of the button body, the sealing between the limiting rod and the button body must be considered to prevent fluid pumped into the discharge chamber from leaking through the assembly point. Additionally, to achieve elastic extension and retraction of the plug, existing self-sealing push-button discharge devices require a metal spring inside the discharge chamber. This spring directly contacts the fluid pumped into the discharge chamber, which corrodes the spring, reducing its elasticity and causing fluid contamination. Utility Model Content

[0003] One objective of this invention is to provide a self-sealing cap and a press pump, wherein the self-sealing cap of this invention has a simple structure and lower cost compared to the prior art.

[0004] One objective of this invention is to provide a self-sealing cap and a press pump, wherein the self-sealing cap can be entirely plastic, which not only allows the press pump to be entirely plastic, but also prevents the elastic part of the elastic support of the self-sealing cap from losing elasticity and contaminating the fluid due to contact with the fluid.

[0005] One object of this utility model is to provide a self-sealing cap and a press pump, wherein when the cap of the self-sealing cap is pressed, the sealing cap of the self-sealing mechanism of the self-sealing cap automatically opens the first annular hole of the outer end mounting ring of the elastic support of the self-sealing mechanism to allow fluid to be pumped out; after the cap is released, the sealing cap automatically closes the first annular hole of the outer end mounting ring to prevent the fluid remaining in the cap channel from coming into contact with the external environment and deteriorating, thereby achieving long-term preservation of the fluid remaining in the cap channel. According to one aspect of this utility model, a self-sealing cap is provided, comprising: Headgear, wherein the headgear has a headgear channel; and The self-sealing mechanism includes an elastic support and a self-sealing rod. The elastic support includes an outer end mounting ring, an inner end mounting ring, and an elastic portion extending between the outer end mounting ring and the inner end mounting ring. The outer end mounting ring has a first annular hole. The self-sealing rod includes a rod body and a sealing cap disposed at the outer end of the rod body. The inner diameter of the first annular hole of the outer end mounting ring is larger than the outer diameter of the rod body and smaller than the outer diameter of the sealing cap. The inner end of the rod body is installed on the inner end mounting ring after passing through the first annular hole of the outer end mounting ring. The outer end mounting ring is installed on the head cap. The first annular hole of the outer end mounting ring communicates with the head cap channel of the head cap. The elastic portion and the inner end mounting ring are located in the head cap channel of the head cap, and the outer diameter of the elastic portion and the outer diameter of the inner end mounting ring are both smaller than the inner diameter of the head cap channel of the head cap. In its natural state, the elastic portion causes the sealing cap to close the first annular hole of the outer end mounting ring.

[0006] According to one embodiment of the present invention, the outer end mounting ring is embedded in the head cap channel of the head cap.

[0007] According to one embodiment of the present invention, the headgear has an extension mouth, a portion of the headgear channel is formed in the extension mouth, the outer end mounting ring has an insertion groove, and the end of the extension mouth is inserted into the insertion groove of the outer end mounting ring.

[0008] According to one embodiment of the present invention, the inner end assembly ring has a second annular hole, and the inner end of the rod is installed on the inner end assembly ring after being inserted into or passing through the second annular hole of the inner end assembly ring.

[0009] According to one embodiment of the present invention, the inner end assembly ring has a second annular hole, and the inner end of the rod has a convex ring. The outer diameter of the convex ring is larger than the inner diameter of the second annular hole of the inner end assembly ring. After the convex ring of the rod passes through the second annular hole of the inner end assembly ring, the inner end of the rod is installed on the inner end assembly ring.

[0010] According to one embodiment of the present invention, the opening size of the second annular hole of the inner end assembly ring on the side facing the outer end assembly ring is larger than the opening size on the side away from the outer end assembly ring, so that the inner wall of the inner end assembly ring used to define the second annular hole is an inclined guide surface, and the side of the convex ring of the rod body away from the sealing cap is an inclined insertion surface. When installing the inner end of the rod body and the inner end assembly ring, the insertion surface of the convex ring of the rod body and the guide surface of the inner end assembly ring can fit together to guide the convex ring through the second annular hole of the inner end assembly ring.

[0011] According to one embodiment of the present invention, the outer end assembly ring, the elastic part, and the inner end assembly ring of the elastic support are integrally injection molded from plastic material.

[0012] According to one embodiment of the present invention, the elastic portion is pre-compressed in its natural state.

[0013] According to another aspect of the present invention, the present invention further provides a self-sealing cap, which includes: Headgear, wherein the headgear has a headgear channel; and The self-sealing mechanism includes an elastic support and a self-sealing rod. The elastic support includes an outer end mounting ring, an inner end mounting ring, and an elastic portion extending between the outer end mounting ring and the inner end mounting ring. The outer end mounting ring has a first annular hole. The self-sealing rod includes a rod body and a sealing cap disposed at the outer end of the rod body. The inner diameter of the first annular hole of the outer end mounting ring is larger than the outer diameter of the rod body. The inner end of the rod body is installed in the inner end mounting ring after passing through the first annular hole of the outer end mounting ring. The outer end mounting ring is fitted into the head cap channel of the head cap. The first annular hole of the outer end mounting ring communicates with the head cap channel of the head cap. The elastic portion and the inner end mounting ring are located in the head cap channel of the head cap, and the outer diameter of the elastic portion and the outer diameter of the inner end mounting ring are both smaller than the inner diameter of the head cap channel of the head cap. In its natural state, the elastic portion causes the sealing cap to close the front opening of the head cap channel of the head cap.

[0014] According to another aspect of the present invention, the present invention further provides a push-button pump, which includes a pump body unit and a self-sealing cap, wherein the self-sealing cap includes: Headgear, wherein the headgear has a headgear channel; and The self-sealing mechanism includes an elastic support and a self-sealing rod. The elastic support includes an outer end mounting ring, an inner end mounting ring, and an elastic portion extending between the outer end mounting ring and the inner end mounting ring. The outer end mounting ring has a first annular hole. The self-sealing rod includes a rod body and a sealing cap disposed at the outer end of the rod body. The inner diameter of the first annular hole in the outer end mounting ring is larger than the outer diameter of the rod body and smaller than the outer diameter of the sealing cap. The inner end of the rod body is installed in the inner end mounting ring after passing through the first annular hole in the outer end mounting ring. An assembly ring is installed on the head cap. The first annular hole of the outer assembly ring communicates with the head cap channel of the head cap. The elastic part and the inner assembly ring are located in the head cap channel of the head cap. The outer diameter of the elastic part and the outer diameter of the inner assembly ring are both smaller than the inner diameter of the head cap channel of the head cap. In its natural state, the elastic part causes the sealing cap to close the first annular hole of the outer assembly ring. The head cap is installed on the top of the valve stem of the pump body unit, and the head cap channel of the head cap communicates with the valve stem channel of the valve stem.

[0015] According to another aspect of the present invention, the present invention further provides a push-button pump, which includes a pump body unit and a self-sealing cap, wherein the self-sealing cap includes: Headgear, wherein the headgear has a headgear channel; and The self-sealing mechanism includes an elastic support body and a self-sealing rod. The elastic support body includes an outer end mounting ring, an inner end mounting ring, and an elastic portion extending between the outer end mounting ring and the inner end mounting ring. The outer end mounting ring has a first annular hole. The self-sealing rod includes a rod body and a sealing cap disposed at the outer end of the rod body. The inner diameter of the first annular hole in the outer end mounting ring is larger than the outer diameter of the rod body. The inner end of the rod body is installed in the inner end mounting ring after passing through the first annular hole in the outer end mounting ring. The outer end mounting ring is fitted into the headgear. The cap channel of the cap, the first annular hole of the outer end mounting ring is connected to the cap channel of the cap, the elastic part and the inner end mounting ring are located in the cap channel of the cap, and the outer diameter of the elastic part and the outer diameter of the inner end mounting ring are both smaller than the inner diameter of the cap channel of the cap. In the natural state, the elastic part causes the sealing cover to close the front end opening of the cap channel of the cap, wherein the cap is installed on the top of the valve stem of the pump body unit, and the cap channel of the cap and the valve stem channel of the valve stem are connected. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a press pump in one state according to a preferred embodiment of the present invention.

[0017] Figure 2 This is a perspective view of another state of the press pump according to the above-described preferred embodiment of the present invention.

[0018] Figure 3 This is a cross-sectional schematic diagram of one state of the press pump according to the above-described preferred embodiment of the present invention.

[0019] Figure 4 This is a cross-sectional schematic diagram of another state of the press pump according to the above-described preferred embodiment of the present invention.

[0020] Figure 5 This is an exploded view of the press pump according to the above-described preferred embodiment of the present invention.

[0021] Figure 6 This is a cross-sectional schematic diagram of a modified example of the press pump according to the above-described preferred embodiment of the present invention.

[0022] Figure 7 This is a cross-sectional schematic diagram of another modified example of the press pump according to the above-described preferred embodiment of the present invention. Detailed Implementation

[0023] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0024] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” and “one or more” refer to one, two, or more than two. The term “and / or” is used to describe the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can indicate: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character “ / ” generally indicates that the preceding and following related objects are in an “or” relationship.

[0025] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0026] Appendix Figures 1 to 5 A preferred embodiment of the present invention is shown, wherein the press pump can be installed on a bottle for pumping fluid contained in the bottle, the press pump comprising a pump body unit 10 and a self-sealing cap 20, the self-sealing cap 20 being installed on the pump body unit 10.

[0027] Specifically, the pump unit 10 includes a pump housing 11, a one-way valve 12, a piston seat 13, a piston 14, a spring 15, a valve stem 16, a locking cap 17, and a thread 18. The pump housing 11 has a pump chamber 111 and a bottom inlet hole 112 communicating with the pump chamber 111. The one-way valve 12 is disposed in the pump chamber 111 of the pump housing 11 to open and close the bottom inlet hole 112 of the pump housing 11. The piston seat 13 has a three-dimensional channel 131 and a channel opening 132 located on the side of the piston seat 13. The piston 14 is movably mounted on the piston seat 13 and the pump chamber 111 of the pump housing 11. As the piston 14 moves up and down, it can open and close the channel opening 132 of the piston seat 13 and change the size of the bottom space of the pump chamber 111 of the pump housing 11. A spring 15 is disposed in the pump chamber 111 of the pump housing 11, with the bottom of the spring 15 abutting against the pump housing 11 and the top of the spring 15 abutting against the piston seat 13. The valve stem 16 has a valve stem passage 161 and an abutment ring 162 located at the bottom of the valve stem 16. The bottom of the valve stem 16 is mounted on the piston seat 13. The valve stem passage 161 of the valve stem 16 and the seat passage 162 of the piston seat 13 are connected. 31. The locking cap 17 is fitted onto the middle of the valve stem 16 and fixedly installed at the opening of the pump chamber 111 of the pump housing 11 to prevent the piston seat 13, the piston 14, the spring 15, and the valve stem 16 from falling out of the pump chamber 111 of the pump housing 11. A thread 18 is installed on the top of the pump housing 11, and the thread 18 can be screwed onto the bottle opening to install the press pump onto the bottle. The self-sealing cap 20 includes a cap 21 with a cap channel 211. The cap 21 is installed on the top of the valve stem 16, and the cap channel 211 of the cap 21 communicates with the valve stem channel 161 of the valve stem 16.

[0028] When the cap 21 is pressed, the cap 21 drives the valve stem 16 and the piston seat 13 to move downward and compress the spring 15. Since the peripheral wall of the piston 14 and the inner wall of the pump housing 11 are in close contact, there is a large friction between them. Therefore, at this stage, the piston 14 remains stationary, and the piston 14 and the piston seat 13 undergo relative displacement, causing the channel opening 132 of the piston seat 13 to be opened. At this time, the pump chamber 111 of the pump housing 11 is connected to the seat channel 131 through the channel opening 132 of the piston seat 13, and the abutment ring 162 of the valve stem 16 abuts against the top of the piston 14. Continue pressing the cap 21, which drives the valve stem 16, the piston seat 13, and the piston 14 to move downward and continue to compress the spring 15. Since the one-way valve 12 is held in the position of closing the bottom inlet hole 112 of the pump housing 11, the bottom space of the pump chamber 111 of the pump housing 11 is compressed, causing the fluid in the space to flow sequentially through the seat channel 131 of the piston seat 13, the valve stem channel 161 of the valve stem 16, and the cap channel 211 of the cap 21 and be discharged. When the cap 21 is released, the spring 15 pushes the piston seat 13, the valve stem 16 and the cap 21 upward during the process of returning to the initial state. Since the peripheral wall of the piston 14 and the inner wall of the pump housing 11 are in close contact, there is a large friction between them. Therefore, during this stage, the piston 14 remains stationary, and the piston 14 and the piston seat 13 undergo relative displacement, causing the channel opening 132 of the piston seat 13 to be closed. At this time, the pump chamber 111 of the pump housing 11 and the seat channel 131 of the piston seat 13 are prevented from communicating. The spring 15 continues to push the piston seat 13, the piston 14, the valve stem 16, and the cap 21 upwards. This expands the bottom space of the pump chamber 111 of the pump housing 11, causing the one-way valve 12 to open the bottom inlet port 112 of the pump housing 11. At this time, fluid in the bottle can enter the bottom space of the pump chamber 111 of the pump housing 11 through the bottom inlet port 112. After the pressure in this space and the pressure inside the bottle are restored to equilibrium, the one-way valve 12 closes the bottom inlet port 112 of the pump housing 11. This process repeats, allowing the pump to draw fluid from the bottle.

[0029] Despite in the appendix Figures 1 to 5 In this example of the push pump shown, the spring 15 is a metal spring. In other examples of the push pump, the spring 15 may also be a plastic spring to facilitate the complete plasticization of the push pump.

[0030] The pump unit 10 also includes a suction tube 19, the top of which is inserted into the bottom of the pump housing 11. When the push pump is installed on the bottle by the thread 18, the bottom of the suction tube 19 can extend into the bottom of the bottle.

[0031] In this utility model, reference continues to be made to the appendix. Figures 1 to 5 The self-sealing cap 20 also includes a self-sealing mechanism 22. When the cap 21 is pressed, the self-sealing mechanism 22 opens the front opening of the cap channel 211 of the cap 21 to allow fluid to be pumped out. When the cap 21 is released, the self-sealing mechanism 22 automatically closes the front opening of the cap channel 211 of the cap 21 to prevent the fluid remaining in the cap channel 211 of the cap 21, the valve stem channel 161 of the valve stem 16, and the seat channel 131 of the piston seat 13 from coming into contact with the external environment and deteriorating. This achieves long-term preservation of the fluid remaining in the cap channel 211 of the cap 21, the valve stem channel 161 of the valve stem 16, and the seat channel 131 of the piston seat 13.

[0032] Specifically, the self-sealing mechanism 22 includes an elastic support 221, which further includes an outer end assembly ring 2211, an inner end assembly ring 2212, and an elastic portion 2213 extending between the outer end assembly ring 2211 and the inner end assembly ring 2212. When the outer end assembly ring 2211 and the inner end assembly ring 2212 move closer to each other and compress the elastic portion 2213, the elastic portion 2213 accumulates elastic potential energy due to deformation. During the process of restoring the initial state, the elastic portion 2213 pushes the outer end assembly ring 2211 and the inner end assembly ring 2212 away from each other. The outer end mounting ring 2211 has a first annular hole 22111. The outer end mounting ring 2211 is mounted on the head cap 21. The first annular hole 22111 of the outer end mounting ring 2211 communicates with the head cap channel 211 of the head cap 21, allowing fluid to exit through the first annular hole 22111 of the outer end mounting ring 2211 into the head cap channel 211 of the head cap 21. The inner end mounting ring 2212 and the elastic part 2213 are located in the head cap channel 211 of the head cap 21. It is understood that the outer diameter of the inner end mounting ring 2212 and the outer diameter of the elastic part 2213 are both smaller than the inner diameter of the head cap channel 211 of the head cap 21, so that the inner end mounting ring 2212 can move within the head cap channel 211 of the head cap 21 and the elastic part 2213 can deform within the head cap channel 211 of the head cap 21.

[0033] In the appendix Figures 1 to 5In this specific example of the press pump of the present invention shown, the outer end mounting ring 2211 is fitted into the head cap channel 211 of the head cap 21 to mount the outer end mounting ring 221 onto the head cap 21. Specifically, the shape and size of the outer end mounting ring 2211 are consistent with the shape and size of the head cap channel 211 of the head cap 21. The outer end mounting ring 2211 is provided with at least one outwardly protruding retaining ring 22112. The head cap 21 is provided with at least one groove 212 on the inner wall for forming the head cap channel 211. After the elastic support 221 is completely embedded into the head cap channel 211 of the head cap 21, the peripheral wall of the outer end mounting ring 2211 fits against the inner wall of the head cap 21, and the retaining ring 22112 of the outer end mounting ring 2211 is engaged with the groove 212 of the head cap 21. In this way, the outer end mounting ring 2211 is reliably embedded in the head cap channel 211 of the head cap 21, which not only prevents the outer end mounting ring 2211 from falling off the head cap 21, but also achieves a seal between the installation position of the outer end mounting ring 2211 and the head cap 21.

[0034] The self-sealing mechanism 22 further includes a self-sealing rod 222, which includes a rod body 2221 and a sealing cap 2222. The sealing cap 2222 is disposed at the outer end of the rod body 2221. For example, the rod body 2221 and the sealing cap 2222 can be integrally formed from plastic material through injection molding. The inner diameter of the first annular hole 22111 of the outer end mounting ring 2211 is larger than the outer diameter of the rod body 2221 and smaller than the outer diameter of the sealing cap 2222. The inner end of the rod body 2221 is installed on the inner end mounting ring 2212 after passing through the first annular hole 22111 of the outer end mounting ring 2211.

[0035] In its natural state (when the cap 21 is not pressed), the elastic part 2213 causes the sealing cover 2222 to close the first annular hole 22111 of the outer end assembly ring 2211. When the cap 21 is pressed, since the fluid needs to be pumped out through the cap channel 211 of the cap 21 and the first annular hole 22111 of the outer end assembly ring 2212, the high-pressure fluid will push the sealing cover 2222 to move the rod 2221 outward and open the first annular hole 22111 of the outer end assembly ring 2211. The rod 2221 pulls the inner end assembly ring 2212 outward, causing the inner end assembly ring 2212 to compress the elastic part 2213 towards the outer end assembly ring 2211. This causes the elastic part 2213 to accumulate elastic potential energy due to compression deformation. At this time, the fluid will be discharged through the first annular hole 22111 of the outer end assembly ring 2211. After the cap 21 is released, since no more fluid is pumped out, the elastic part 2213 pushes the inner end assembly ring 2212 away from the outer end assembly ring 2211 during the process of returning to the initial state. The inner end assembly ring 2212 pulls the rod body 2221 and the sealing cap 2222 inward, so that the sealing cap 2222 seals the first annular hole 22111 of the outer end assembly ring 2211, thereby closing the first annular hole 22111 of the outer end assembly ring 2211. This prevents the fluid remaining in the cap channel 211 of the cap 21, the valve stem channel 161 of the valve stem 16, and the seat channel 131 of the piston seat 13 from coming into contact with the external environment and deteriorating. This achieves long-term preservation of the fluid remaining in the cap channel 211 of the cap 21, the valve stem channel 161 of the valve stem 16, and the seat channel 131 of the piston seat 13.

[0036] Preferably, in its natural state, the elastic part 2213 is pre-compressed, so that the sealing cap 2222 can fit tightly against the end face of the outer end assembly ring 2211, thereby reliably sealing the first annular hole 22111 of the outer end assembly ring 2211.

[0037] In the appendix Figures 1 to 5 In this specific example of the push pump of the present invention shown, the outer end mounting ring 2211, the inner end mounting ring 2212, and the elastic part 2213 of the elastic support 221 can be integrally injection molded from plastic material. This not only simplifies the specific structure of the push pump and realizes the full plasticization of the push pump, but also prevents the elastic part 2213 of the elastic support 221 from experiencing reduced elasticity and contaminating the fluid due to contact with the fluid.

[0038] It is worth mentioning that the specific shape of the elastic part 2213 is not limited in the press pump of this utility model. For example, in the attached... Figures 1 to 5 In this specific example of the push pump shown, the elastic part 2213 includes three elastic legs 22131, which are spaced apart from each other and extend spirally between the outer end mounting ring 2211 and the inner end mounting ring 2212.

[0039] Further, the inner end mounting ring 2212 has a second annular hole 22121. The inner end of the rod 2221 is installed in the inner end mounting ring 2212 after passing through the second annular hole 22121. Thus, when the high-pressure fluid pushes the sealing cap 2222 outward, the sealing cap 2222 can pull the inner end mounting ring 2212 outward through the rod 2221. When the elastic part 2213 pushes the inner end mounting ring 2212 inward, the inner end mounting ring 2212 can pull the rod 2221 and the sealing cap 2222 inward. Optionally, in one embodiment of this utility model, the inner end of the rod 2221 is installed in the inner end mounting ring 2212 after being inserted into the second annular hole 22121.

[0040] It is worth mentioning that the specific way in which the inner end of the rod 2221 is installed on the inner end assembly ring 2212 is not limited in the press pump of this utility model. For example, in some embodiments, the inner end of the rod 2221 is provided with an external thread structure, and the inner wall of the inner end assembly ring 2212 for forming the second annular hole 22121 is provided with an internal thread structure. The external thread structure of the rod 2221 and the internal thread structure of the inner end assembly ring 2212 cooperate with each other to screw the inner end of the rod 2221 onto the inner end assembly ring 2212.

[0041] In the appendix Figures 1 to 5In this specific example of the press pump of the present invention shown, the inner end of the rod 2221 has a convex ring 22211. The outer diameter of the convex ring 22211 is slightly larger than the inner diameter of the second annular hole 22121 of the inner end mounting ring 2212. When the convex ring 22211 of the rod 2221 passes through the second annular hole 22121 of the inner end mounting ring 2212, the convex ring 22211 presses the inner end mounting ring 2212 outward, causing... The inner end mounting ring 2212 is slightly deformed. After the convex ring 22211 passes through the second annular hole 22121 of the inner end mounting ring 2212, the inner end mounting ring 2212 returns to its initial state, preventing the convex ring 22211 from passing through the second annular hole 22121 of the inner end mounting ring 2212 in the opposite direction. In this way, the inner end of the rod 2221 is installed on the inner end mounting ring 2212, preventing the inner end of the rod 2221 from falling off the inner end mounting ring 2212.

[0042] When installing the self-sealing rod 222 onto the elastic support 221, to facilitate the inner end of the rod 2221 passing through the second annular hole 22121 of the inner end mounting ring 2212, the opening size of the second annular hole 22121 of the inner end mounting ring 2212 on the side facing the outer end mounting ring 2211 is larger than the opening size on the side away from the outer end mounting ring 2211, so that the inner wall of the inner end mounting ring 2212 that defines the second annular hole 22121 is an inclined guide surface 22122. The side of the protruding ring 22211 of the rod 2221 facing away from the sealing cap 2222 is an inclined insertion surface 222111. When installing the inner end of the rod 2221 and the inner end mounting ring 2212, the insertion surface 222111 of the protruding ring 22211 of the rod 2221 and the guide surface 22122 of the inner end mounting ring 2212 can fit together to guide the protruding ring 22211 of the rod 2221 through the second annular hole 22121 of the inner end mounting ring 2212.

[0043] Reference Appendix Figures 2 to 5 The outer end assembly ring 2211 has a receiving groove 22113 on its end face. The inner diameter of the receiving groove 22113 is the same as the outer diameter of the sealing cap 2222, and the depth of the receiving groove 22113 is the same as the thickness of the sealing cap 2222. Thus, in its natural state, the sealing cap 2222 is received in the receiving groove 22113 of the outer end assembly ring 2211, preventing the sealing cap 2222 from protruding.

[0044] In this utility model, the assembly process of the self-sealing cap 20 can be as follows: First, after the inner end of the rod 2221 passes through the first annular hole 22111 of the outer end mounting ring 2211, the protruding ring 22211 of the rod 2221 is allowed to protrude into the second annular hole 22121 of the inner end mounting ring 2212. At this time, the insertion surface 222111 of the protruding ring 22211 is in contact with the guide surface 22122 of the inner end mounting ring 2212. Second, the sealing cap 2222 of the self-sealing rod 222 is pressed, so that the protruding ring 22211 of the rod 2221 passes through the second annular hole 22121 of the inner end mounting ring 2212, so as to install the self-sealing rod 222 onto the elastic support 221. The elastic part 2213 is pre-compressed so that the sealing cap 2222 is pressed against the end face of the outer end mounting ring 2211 to close the first ring hole 22111 of the outer end mounting ring 2211; then, the outer end mounting ring 2211 is fitted into the head cap 21 by first inserting the inner end mounting ring 2212 into the head cap channel 211 of the head cap 21, so that the self-sealing mechanism 22 can be installed on the head cap 21 to assemble the self-sealing head cap 20. At this time, the inner end mounting ring 2212 and the elastic part 2213 are suspended in the head cap channel 211 of the head cap 21, that is, neither the inner end mounting ring 2212 nor the elastic part 2213 contacts the inner wall of the head cap 21 that forms the head cap channel 21.

[0045] Appendix Figure 6 A modified example of the press pump of this utility model is shown, with reference to the appendix. Figures 1 to 5 Unlike the pump shown, the attached... Figure 6 In this specific example of the press pump shown, the cap 21 has an extension nozzle 213, a portion of the cap channel 211 is formed in the extension nozzle 213 of the cap 21, and the outer end mounting ring 2211 has an insertion slot 22114, the end of the extension nozzle 213 of the cap 21 being inserted into the insertion slot 22114 of the outer end mounting ring 2211 to mount the outer end mounting ring 2211 to the cap 21.

[0046] Appendix Figure 7 A modified example of the press pump of this utility model is shown, with reference to the appendix. Figures 1 to 5 Unlike the pump shown, the attached... Figure 7 In this specific example of the press pump shown, in its natural state, the elastic part 2213 causes the sealing cap 2222 to close the front opening of the cap channel 211 of the cap 21, and when the cap 21 is pressed, the sealing cap 2222 is able to open the front opening of the cap channel 211 of the cap 21.

[0047] The above descriptions are merely embodiments of the utility model, and common technical solutions and / or characteristics known in the scheme are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A self-sealing headgear, characterized in that, include: Headgear, wherein the headgear has a headgear channel; and The self-sealing mechanism includes an elastic support and a self-sealing rod. The elastic support includes an outer end mounting ring, an inner end mounting ring, and an elastic portion extending between the outer end mounting ring and the inner end mounting ring. The outer end mounting ring has a first annular hole. The self-sealing rod includes a rod body and a sealing cap disposed at the outer end of the rod body. The inner diameter of the first annular hole of the outer end mounting ring is larger than the outer diameter of the rod body and smaller than the outer diameter of the sealing cap. The inner end of the rod body is installed on the inner end mounting ring after passing through the first annular hole of the outer end mounting ring. The outer end mounting ring is installed on the head cap. The first annular hole of the outer end mounting ring communicates with the head cap channel of the head cap. The elastic portion and the inner end mounting ring are located in the head cap channel of the head cap, and the outer diameter of the elastic portion and the outer diameter of the inner end mounting ring are both smaller than the inner diameter of the head cap channel of the head cap. In its natural state, the elastic portion causes the sealing cap to close the first annular hole of the outer end mounting ring.

2. The self-sealing cap according to claim 1, wherein the outer end mounting ring is fitted into the cap channel of the cap.

3. The self-sealing cap according to claim 1, wherein the cap has an extension nozzle, a portion of the cap channel is formed in the extension nozzle, the outer end fitting ring has an insertion slot, and the end of the extension nozzle is inserted into the insertion slot of the outer end fitting ring.

4. The self-sealing cap according to claim 1, wherein the inner end assembly ring has a second annular hole, and the inner end of the rod is installed on the inner end assembly ring after being inserted into or passing through the second annular hole of the inner end assembly ring.

5. The self-sealing cap according to claim 1, wherein the inner end mounting ring has a second annular hole, the inner end of the rod has a convex ring, the outer diameter of the convex ring is larger than the inner diameter of the second annular hole of the inner end mounting ring, and after the convex ring of the rod passes through the second annular hole of the inner end mounting ring, the inner end of the rod is installed on the inner end mounting ring.

6. The self-sealing cap according to claim 5, wherein the opening size of the second annular hole of the inner end assembly ring on the side facing the outer end assembly ring is larger than the opening size on the side away from the outer end assembly ring, so that the inner wall of the inner end assembly ring for defining the second annular hole is an inclined guide surface, and the side of the protruding ring of the rod body away from the sealing cap is an inclined insertion surface, wherein when the inner end of the rod body and the inner end assembly ring are installed, the insertion surface of the protruding ring of the rod body and the guide surface of the inner end assembly ring can fit together to guide the protruding ring through the second annular hole of the inner end assembly ring.

7. The self-sealing cap according to any one of claims 1 to 6, wherein the outer end mounting ring, the elastic portion, and the inner end mounting ring of the elastic support are integrally injection molded from plastic material.

8. The self-sealing cap according to claim 7, wherein in its natural state, the elastic portion is pre-compressed to make the sealing cap fit snugly against the end face of the outer end fitting ring.

9. A self-sealing headgear, characterized in that, include: Headgear, wherein the headgear has a headgear channel; and The self-sealing mechanism includes an elastic support and a self-sealing rod. The elastic support includes an outer end mounting ring, an inner end mounting ring, and an elastic portion extending between the outer end mounting ring and the inner end mounting ring. The outer end mounting ring has a first annular hole. The self-sealing rod includes a rod body and a sealing cap disposed at the outer end of the rod body. The inner diameter of the first annular hole of the outer end mounting ring is larger than the outer diameter of the rod body. The inner end of the rod body is installed in the inner end mounting ring after passing through the first annular hole of the outer end mounting ring. The outer end mounting ring is fitted into the head cap channel of the head cap. The first annular hole of the outer end mounting ring communicates with the head cap channel of the head cap. The elastic portion and the inner end mounting ring are located in the head cap channel of the head cap, and the outer diameter of the elastic portion and the outer diameter of the inner end mounting ring are both smaller than the inner diameter of the head cap channel of the head cap. In its natural state, the elastic portion causes the sealing cap to close the front opening of the head cap channel of the head cap.

10. A push-button pump, characterized in that, include: Pump body unit; and According to any one of claims 1 to 9, the self-sealing cap is installed on the top of the valve stem of the pump body unit, and the cap channel of the cap is connected to the valve stem channel of the valve stem.

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