Bathroom spray gun structure

By setting the threaded inner hole and the external thread of the valve core on the bathroom spray gun shell, the problems of high processing difficulty and low production efficiency caused by the small size of the fixture device in the prior art are solved, and processing convenience and production are achieved Low cost and high reliability.

CN222287632UActive Publication Date: 2025-01-03KAIPING LEIJING WATER HEATING TECH DEV CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202420260115.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-02-02
Publication Date
2025-01-03
Estimated Expiration
2034-02-02

AI Technical Summary

Technical Problem

The fixed devices of existing bathroom spray guns are small in size, resulting in high processing difficulty, low production efficiency, high production cost, and inconvenient assembly.

Method used

A bathroom spray gun structure was designed, using a threaded inner hole on the spray gun shell, and an external thread was opened on the fixed end of the valve core. The external thread was screwed to the threaded inner hole to realize the positioning and installation of the valve core, avoiding small volume. The hollow thread simplifies the processing and assembly process.

Benefits of technology

It reduces processing difficulty and production costs, improves production efficiency and reliability, ensures stable installation and positioning of the valve core, and enhances applicability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222287632U_ABST
    Figure CN222287632U_ABST
Patent Text Reader

Abstract

The utility model relates to a bathroom spray gun structure which comprises a spray gun shell and a valve core, one end of the valve core is used for feeding water, the other end of the valve core is used for discharging water, and the bathroom spray gun structure is characterized in that a threaded inner hole is formed in the spray gun shell, a water through hole axially penetrating through the threaded inner hole is further formed in the spray gun shell, and an external thread is formed in the fixed end of the valve core. The two ends of the valve element are embedded in the threaded inner hole and the water through hole in a sealed mode respectively, the external threads are in threaded connection with the threaded inner hole, and a toggle switch penetrating out of the spray gun shell is arranged on the valve element. The utility model has the advantages of low processing difficulty, convenience in processing, convenience in assembly, high production efficiency, low production cost, high reliability, strong applicability and the like.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the field of bathroom flushing accessories, in particular to a bathroom spray gun. Background Art

[0002] The patent document with the Chinese authorization announcement number CN214766295U discloses a technical solution named "an adjustable spray gun", which includes the following technical features: a main body, a water outlet, a valve core, a control part, a fixing device, a connecting device, a wear-resistant pad, a sealing device, a matching part, etc. The water outlet channel is stepped, and a thread is provided on the inner side of the water outlet channel. The front end of the shell abuts against the stepped surface. The fixing device is a hollow thread, which can be sleeved on the shaft rod and matched with the thread on the inner side of the water outlet channel. When locked, it just abuts against the rear end of the shell to fix the fixed part of the valve core on the main body. It can be seen that the fixed part of the valve core is clamped and positioned by the fixing device and the stepped water outlet channel. Because this adjustable spray gun is generally used by hand, the volume of the adjustable spray gun will not be too large, so the volume of the fixing device will not be too large; and because the fixing device is a hollow thread, this will make the volume of the fixing device very small. This results in poor processing difficulty and convenience of the fixture, and it is inconvenient to assemble a small-volume fixture, which in turn leads to low production efficiency and high production cost of the adjustable spray gun. Therefore, it is very necessary to redesign the structure of the spray gun. Utility Model Content

[0003] The purpose of the utility model is to solve the above problems and shortcomings and to provide a bathroom spray gun structure, which has the advantages of low processing difficulty, convenient processing, convenient assembly, high production efficiency, low production cost, high reliability, and strong applicability.

[0004] The technical solution of the utility model is achieved in this way:

[0005] A bathroom spray gun structure comprises a spray gun shell and a valve core, wherein the valve core is a valve core with water inlet at one end and water outlet at the other end, and is characterized in that a threaded inner hole is provided on the spray gun shell, and a water through hole axially penetrating the threaded inner hole is provided on the spray gun shell, an external thread is provided on the fixed end of the valve core, and the two ends of the valve core are respectively sealed and embedded in the threaded inner hole and the water through hole, and the external thread is screwed with the threaded inner hole, and a toggle switch is provided on the valve core and extends out of the spray gun shell.

[0006] Preferably, a wrench sleeve portion is provided on the fixed end of the valve core.

[0007] Preferably, a sealing baffle ring is provided on the hole wall of the water through hole, the fixed end of the valve core faces the sealing baffle ring, and a first sealing ring is clamped between the end surface of the fixed end of the valve core and the sealing baffle ring.

[0008] Preferably, a second sealing ring is provided between the outer wall of the valve core and the water through hole.

[0009] Preferably, a positioning protrusion is provided on the movable end of the valve core, the toggle switch is sleeved on the movable end of the valve core, a locking nut is threaded on the movable end of the valve core, and the locking nut and the positioning protrusion are used to clamp the toggle switch.

[0010] Preferably, the toggle switch is sleeved on the movable end of the valve core through a spline.

[0011] Preferably, the toggle switch comprises a sleeve ring and a toggle block, the sleeve ring is sleeved on the movable end of the valve core, a clearance hole penetrating to the sleeve ring is opened on the outer wall of the spray gun housing, an embedding head is provided on the inner wall of the toggle block, and the embedding head is embedded in the sleeve ring after passing through the clearance hole.

[0012] Preferably, the spray gun housing includes a first water pipe and a second water pipe, the threaded inner hole is located in the inner hole of the first water pipe, the valve core is embedded in the inner hole of the first water pipe, the second water pipe is connected to the first water pipe, and the inner hole of the second water pipe is connected to the inner hole of the first water pipe through the valve core, the toggle switch extends out of the first water pipe or the second water pipe, and the inner hole of the second water pipe and the inner hole of the first water pipe together constitute a water hole.

[0013] Preferably, the first water conduit and the second water conduit are threadedly connected together.

[0014] Preferably, a reinforcement ring is provided on the inner wall of the second water conduit, the movable end of the valve core is embedded in the reinforcement ring, and at least one third sealing ring is provided between the movable end of the valve core and the reinforcement ring.

[0015] The beneficial effects of the utility model are as follows: in the bathroom spray gun structure, a threaded inner hole is provided on the spray gun shell, an external thread is provided on the fixed end of the valve core, and the valve core is positioned on the threaded inner hole and the water hole by screwing the external thread and the threaded inner hole. Therefore, the bathroom spray gun structure does not need to be provided with a small-volume hollow thread, which can help to reduce the processing difficulty and facilitate the processing of the bathroom spray gun structure; and when the external thread is screwed, the installation and positioning of the valve core can be achieved at the same time, which can make the assembly of the bathroom spray gun structure more convenient; and thus, the production efficiency of the bathroom spray gun structure can be high and the production cost can be low. Since the external thread is provided on the fixed end of the valve core, the installation and positioning of the valve core can be directly and stably achieved, thereby ensuring that the installation and positioning of the valve core is relatively stable, so that the bathroom spray gun device has high reliability and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the three-dimensional structural schematic diagrams of the bathroom spray gun structure in the utility model.

[0017] Figure 2 This is a schematic diagram of the split structure of the bathroom spray gun structure in the utility model.

[0018] Figure 3 It is a schematic cross-sectional view of the bathroom spray gun structure of the utility model.

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the spray gun shell in the utility model.

[0020] Figure 5 It is a schematic diagram of the assembly structure of the sleeve ring and the valve core in the utility model.

[0021] Figure 6 It is a structural schematic diagram of the toggle switch of the utility model in the state of detaching the valve core.

[0022] Figure 7 This is one of the three-dimensional structural schematic diagrams of the valve core in the utility model.

[0023] Figure 8 This is the second schematic diagram of the three-dimensional structure of the valve core in the utility model.

[0024] Fig. 9 This is the second three-dimensional structural schematic diagram of the bathroom spray gun structure in the utility model.

[0025] Fig.10 This is the third three-dimensional structural schematic diagram of the bathroom spray gun structure in the utility model.

[0026] Fig.11 This is the fourth three-dimensional structural schematic diagram of the bathroom spray gun structure in the utility model.

[0027] Fig.12 This is the fifth three-dimensional structural diagram of the bathroom spray gun structure in the utility model.

[0028] Fig.13 It is a three-dimensional structural schematic diagram of the toggle block in the utility model. DETAILED DESCRIPTION

[0029] like Figures 1 to 4As shown, a bathroom spray gun structure described in the utility model comprises a spray gun shell 1 and a valve core 2. The valve core 2 is a valve core with water inlet at one end and water outlet at the other end. In order to achieve the inventive purpose of the utility model, a threaded inner hole 11 is provided on the spray gun shell 1, and a water through hole 12 axially penetrating the threaded inner hole 11 is also provided on the spray gun shell 1. An external thread 21 is provided on the fixed end of the valve core 2. The two ends of the valve core 2 are respectively sealed and embedded in the threaded inner hole 11 and the water through hole 12, and the external thread 21 is screwed with the threaded inner hole 11. The valve core 2 is also connected in series to the water through hole 12 through its water inlet end and water outlet end. A toggle switch 3 penetrating to the outside of the spray gun shell 1 is provided on the valve core 2, and the toggle switch 3 is used to switch the valve core 2.

[0030] In the bathroom spray gun structure, a threaded inner hole 11 is provided on the spray gun shell 1, an external thread 21 is provided on the fixed end of the valve core 2, and the valve core 2 is positioned on the threaded inner hole 11 and the water hole 12 by screwing the external thread 21 with the threaded inner hole 11. Therefore, the bathroom spray gun structure does not need to be provided with a small-volume hollow thread, which can help to make the processing difficulty of the bathroom spray gun structure small and convenient; and when the external thread 21 is screwed, the installation and positioning of the valve core 2 can be achieved at the same time, which can make the assembly of the bathroom spray gun structure more convenient; and then the bathroom spray gun structure can have high production efficiency and low production cost. Since the external thread 21 is provided on the fixed end of the valve core 2, the installation and positioning of the valve core 2 can be directly and stably achieved, thereby ensuring that the installation and positioning of the valve core 2 is relatively stable, so that the bathroom spray gun device has high reliability and applicability.

[0031] like Figure 2 As shown, the external thread 21 is located on the outer end of the fixed end of the valve core 2, which not only facilitates threaded connection but also saves axial space, thereby better meeting the needs of actual use.

[0032] like Figure 7 and Figure 8As shown, the water on / off structure on the valve core 2 directly adopts the water on / off structure on the existing valve core of this type. The valve core 2 includes a valve core seat 22, a water on / off core body (not shown in the figure), and a rotating tube 23. The water on / off core body is arranged in the valve core seat 22. One end of the rotating tube 23 can be rotatably inserted into the valve core seat 22 and connected with the movable water-passing end of the water on / off core body. A water-passing hole 220 connected with the fixed water-passing end of the water on / off core body is provided on the end surface of the valve core seat 22 away from the rotating tube 23. The valve core seat 22, the water on / off core body, and the rotating tube 23 together constitute the water on / off structure of the valve core 2. When water flows into the water hole 220, water flows out of the inner hole of the rotating tube 23; when water flows into the inner hole of the rotating tube 23, water flows out of the water hole 220; the inner hole of the rotating tube 23 and the water hole 220 respectively constitute the water inlet end and the water outlet end of the valve core 2, or the inner hole of the rotating tube 23 and the water hole 220 respectively constitute the water outlet end and the water inlet end of the valve core 2. The valve core seat 22 and the rotating tube 23 respectively constitute the fixed end and the movable end of the valve core 2, and the external thread 21 is arranged on the outer wall of the valve core seat 22; in this way, a valve core with water flowing in at one end and water flowing out at the other end can be formed, which can well meet the needs of actual manufacturing and use.

[0033] like Figure 7 and Figure 8 As shown, a wrench sleeve portion 24 is provided on the fixed end of the valve core 2. The wrench sleeve portion 24 can be provided to facilitate the rotation of the valve core 2, thereby facilitating the external thread 21 to achieve stable thread connection and facilitate the disassembly of the valve core 2, thereby further helping to further improve the convenience of the assembly and disassembly of the valve core 2.

[0034] like Figure 7 and Figure 8 As shown, the wrench sleeve 24 is a regular hexagonal convex ring arranged on the end surface of the valve core seat 22. When disassembling, the valve core 2 can be assembled and disassembled by using a socket wrench to cover the wrench sleeve 24. The regular hexagonal convex ring can enhance the structural strength of the valve core 2 by using the wrench sleeve 24, thereby helping to improve the reliability of the bathroom spray gun structure.

[0035] like Figure 3 and Figure 4 As shown, a sealing retaining ring 13 is provided on the hole wall of the water hole 12, the fixed end of the valve core 2 faces the sealing retaining ring 13, and a first sealing ring 10 is sandwiched between the end surface of the fixed end of the valve core 2 and the sealing retaining ring 13. The cooperation between the sealing retaining ring 13 and the first sealing ring 10 can enhance the sealing performance of the valve core 2 installation, thereby helping to further improve the reliability of the bathroom spray gun structure.

[0036] like Figure 8As shown, the first sealing ring 10 is embedded on the end surface of the valve core seat 22, and the first sealing ring 10 is arranged around the water hole 220, and the water hole 220 is connected to the inner hole of the sealing retaining ring 13. In this way, the requirements of sealing and water flow can be met, thereby meeting the requirements of actual manufacturing and use.

[0037] like Figure 3 As shown, a second sealing ring 20 is provided between the outer wall of the valve core 2 and the water through hole 12. The second sealing ring 20 can enhance the sealing performance of the valve core 2 installation, thereby helping to further improve the reliability and applicability of the bathroom spray gun structure.

[0038] like Figure 7 and Figure 8 As shown, the second sealing ring 20 is nested on the valve core seat 22. In this way, the second sealing ring 20 can play a very stable sealing role, thereby being able to meet the needs of actual use very well.

[0039] like Figure 3 , Figures 5 to 8 As shown, a positioning protrusion 25 is provided on the movable end of the valve core 2, and the toggle switch 3 is sleeved on the movable end of the valve core 2. A locking nut 26 is screwed on the movable end of the valve core 2, and the locking nut 26 and the positioning protrusion 25 are used to clamp the toggle switch 3. The positioning protrusion 25 and the locking nut 26 can stably limit the toggle switch 3, thereby helping to improve the stability of the installation and positioning of the toggle switch 3, thereby preventing the toggle switch 3 from loosening when the water comes out, and preventing the toggle switch 3 from scratching the spray gun housing 1, which can improve the smoothness and stability of the rotation of the toggle switch 3, and the user experience is better, thereby helping to further improve the reliability and applicability of the bathroom spray gun structure.

[0040] like Figure 3 , Figure 7 and Figure 8 As shown, the positioning protrusion 25 is a protruding ring integrated with the rotating tube 23, and a threaded portion 231 for the locking nut 26 to be screwed is provided on the outer circumferential surface of the rotating tube 23, so that the toggle switch 3 can be clamped more stably and reliably, thereby helping to further improve the stability and reliability of the installation and positioning of the toggle switch 3.

[0041] like Figure 3 As shown, the toggle switch 3 is mounted on the movable end of the valve core 2 through a spline. The use of the spline mounting can improve the stability and reliability of the toggle switch 3 mounting to prevent the toggle switch 3 from slipping, thereby helping to further improve the stability and accuracy of the toggle switch 3 driving the valve core 2 to switch on and off.

[0042] like Figure 3 , Figures 6 to 8As shown, a spline portion 232 integral with the rotating tube 23 is protruded on the outer wall of the rotating tube 23, and the spline portion 232 is located between the threaded portion 231 and the positioning protrusion 25. A spline hole 30 is provided on the toggle switch 3, and the spline hole 30 is sleeved on the spline portion 232. In this way, the requirements of actual manufacturing and assembly can be met, and the purpose of stably limiting the toggle switch 3 can be achieved, so that the requirements of actual use can be stably met.

[0043] like Figures 1 to 6 As shown, the toggle switch 3 includes a sleeve ring 31 and a toggle block 32. The sleeve ring 31 is sleeved on the movable end of the valve core 2. A clearance hole 14 is provided on the outer wall of the spray gun housing 1 and penetrates to the sleeve ring 31. An embedding head 321 is provided on the inner wall of the toggle block 32. The embedding head 321 passes through the clearance hole 14 and is embedded on the sleeve ring 31. Such a toggle switch 3 is very simple and reliable, which is not only convenient for manufacturing, but also convenient for use, and can reduce space occupation and reduce scratches, so as to provide users with a better experience.

[0044] like Figures 1 to 3 , Figure 6 As shown, the inner hole of the set ring 31 forms a spline hole 30, the toggle block 32 is in a sheet shape, and the toggle block 32 is arranged parallel to the outer wall of the spray gun housing 1, the radial section of the clearance hole 14 is in a strip shape, and the length direction of the radial section of the clearance hole 14 is in the same direction as the rotation direction of the rotating tube 23. In this way, the actual manufacturing and use requirements can be well met.

[0045] like Fig.12 and Fig.13 As shown, the toggle block 32 is a short cylinder, and an anti-slip surface 322 is provided on the outer circumferential surface of the toggle block 32. The embedding head 321 is a screw joint, and the embedding head 321 is screwed on the sleeve ring 31. This can also meet the actual manufacturing and use requirements.

[0046] like Figure 3 , Figure 5 and Figure 6 As shown, the edges of the two end ports of the sleeve ring 31 are respectively provided with clearance grooves 311, one of which is placed on the positioning protrusion 25, and the locking nut 26 is placed in the other clearance groove 311, and the locking nut 26 and the positioning protrusion 25 are clamped together to mount the sleeve ring 31. This not only meets the requirement that the locking nut 26 and the positioning protrusion 25 are clamped together to mount the toggle switch 3, but also reduces the axial space occupied, thereby being conducive to controlling the volume of the bathroom spray gun structure, so that the bathroom spray gun structure can have a wider range of applications.

[0047] like Figures 1 to 4As shown, the spray gun housing 1 includes a first water conduit 15 and a second water conduit 16, the threaded inner hole 11 is located in the inner hole of the first water conduit 15, the valve core 2 is embedded in the inner hole of the first water conduit 15, the second water conduit 16 is connected to the first water conduit 15, and the inner hole of the second water conduit 16 is connected to the inner hole of the first water conduit 15 through the valve core 2, the toggle switch 3 is passed out of the first water conduit 15 or the second water conduit 16, and the inner hole of the second water conduit 16 and the inner hole of the first water conduit 15 together constitute a water hole 12. This can facilitate manufacturing and assembly, thereby helping to improve the efficiency of manufacturing and assembly.

[0048] like Figure 4 As shown, the sealing retaining ring 13 is located in the inner hole of the first water conduit 15, the threaded inner hole 11 is composed of convex screw threads arranged against the sealing retaining ring 13, and the clearance hole 14 penetrates from the outer wall of the first water conduit 15 into the first water conduit 15, which can meet the actual manufacturing, assembly and use requirements.

[0049] like Figure 4 As shown, the first water conduit 15 and the second water conduit 16 are threadedly connected together. This can conveniently and stably connect the first water conduit 15 and the second water conduit 16 together, thereby ensuring that the assembly is very convenient and stable.

[0050] like Figures 2 to 4 As shown, the inner hole opening of the first water conduit 15 is provided with an internal thread 151, and the end of the second water conduit 16 is provided with a screw head 161 matching the internal thread 151, and a limiting ring groove 162 is provided at the connection between the screw head 161 and the second water conduit 16, and a rubber ring 163 is embedded in the limiting ring groove 162. The internal thread 151 is screwed on the screw head 161, and the pipe mouth of the first water conduit 15 is pressed against the rubber ring 163. This can conveniently and stably dock the first water conduit 15 and the second water conduit 16 together, and the rubber ring 163 can be used to enhance the restriction, thereby helping to further improve the stability and reliability of docking.

[0051] like Figures 2 to 4 As shown, a reinforcing ring 164 is provided on the inner wall of the second water conduit 16, the movable end of the valve core 2 is embedded in the reinforcing ring 164, and at least one third sealing ring 40 is provided between the movable end of the valve core 2 and the reinforcing ring 164. The reinforcing ring 164 can not only enhance the structural strength of the second water conduit 16, but also enable the second water conduit 16 to better dock with the movable end of the valve core 2. The third sealing ring 40 can enhance the sealing performance of the docking, thereby helping to further improve the reliability of the bathroom spray gun structure.

[0052] like Figure 3 , Figure 7 and Figure 8 As shown, the third sealing ring 40 is nested on the rotating tube 23 or embedded on the inner wall of the reinforcing ring 164, and the rotating tube 23 is inserted into the reinforcing ring 164, which can well meet the requirements of actual assembly and use.

[0053] like Figures 1 to 4 , Figures 9 to 12 As shown, a first screw joint 152 is provided on the outer end of the first water conduit 15, and the first water conduit 15 is a straight pipe or a curved pipe, and a second screw joint 165 is provided on the outer end of the second water conduit 16. When the second water conduit 16 is used as a water inlet pipe and the first water conduit 15 is used as a water outlet pipe, a water supply hose (not shown) is screwed on the second screw joint 165, and various styles of water outlets 50 can be screwed on the first screw joint 152 to meet different water outlet requirements. When in use, the user holds the second water conduit 16 and uses a finger to turn the toggle block 32 to meet the need of turning the water on and off, thereby meeting the needs of actual use.

Claims

1. A bathroom spray gun structure, comprising a spray gun housing (1) and a valve core (2), wherein the valve core (2) is a valve core with water inlet at one end and water outlet at the other end, characterized in that: The spray gun housing (1) is provided with a threaded inner hole (11), and the spray gun housing (1) is also provided with a water hole (12) axially penetrating the threaded inner hole (11). The fixed end of the valve core (2) is provided with an external thread (21). The two ends of the valve core (2) are respectively sealed and embedded in the threaded inner hole (11) and the water hole (12), and the external thread (21) is screwed with the threaded inner hole (11). The valve core (2) is provided with a toggle switch (3) extending out of the spray gun housing (1).

2. The bathroom spray gun structure according to claim 1, characterized in that: A wrench sleeve portion (24) is provided on the fixed end of the valve core (2).

3. The bathroom spray gun structure according to claim 1, characterized in that: A sealing retaining ring (13) is provided on the hole wall of the water through hole (12), the fixed end of the valve core (2) faces the sealing retaining ring (13), and a first sealing ring (10) is sandwiched between the end surface of the fixed end of the valve core (2) and the sealing retaining ring (13).

4. The bathroom spray gun structure according to claim 1 or 3, characterized in that: A second sealing ring (20) is provided between the outer wall of the valve core (2) and the water through hole (12).

5. The bathroom spray gun structure according to claim 1, characterized in that: A positioning convex portion (25) is provided on the movable end of the valve core (2), the toggle switch (3) is sleeved on the movable end of the valve core (2), a locking nut (26) is threadedly connected to the movable end of the valve core (2), and the locking nut (26) and the positioning convex portion (25) are used together to clamp the toggle switch (3).

6. The bathroom spray gun structure according to claim 5, characterized in that: The toggle switch (3) is sleeved on the movable end of the valve core (2) via a spline.

7. The bathroom spray gun structure according to claim 5, characterized in that: The toggle switch (3) comprises a sleeve ring (31) and a toggle block (32); the sleeve ring (31) is sleeved on the movable end of the valve core (2); a clearance hole (14) is provided on the outer wall of the spray gun housing (1) and extends through the sleeve ring (31); an embedding head (321) is provided on the inner wall of the toggle block (32); the embedding head (321) passes through the clearance hole (14) and is then embedded in the sleeve ring (31).

8. The bathroom spray gun structure according to claim 1, characterized in that: The spray gun housing (1) comprises a first water pipe (15) and a second water pipe (16); the threaded inner hole (11) is located in the inner hole of the first water pipe (15); the valve core (2) is embedded in the inner hole of the first water pipe (15); the second water pipe (16) is connected to the first water pipe (15); the inner hole of the second water pipe (16) is connected to the inner hole of the first water pipe (15) through the valve core (2); the toggle switch (3) extends out of the first water pipe (15) or the second water pipe (16); the inner hole of the second water pipe (16) and the inner hole of the first water pipe (15) together form a water hole (12).

9. The bathroom spray gun structure according to claim 8, characterized in that: The first water conduit (15) and the second water conduit (16) are threadedly butt-jointed together.

10. The bathroom spray gun structure according to claim 8, characterized in that: A reinforcement ring (164) is provided on the inner wall of the second water conduit (16), the movable end of the valve core (2) is embedded in the reinforcement ring (164), and at least one third sealing ring (40) is provided between the movable end of the valve core (2) and the reinforcement ring (164).