A connector

Abstract

The present invention discloses a connector, including a main body, a sleeve, a center rod assembly, and a gasket. The main body has a fluid hole and a drive hole, and the fluid hole has a stepped hole at its air outlet end; one end of the sleeve is inserted from the air outlet end of the main body and forms a movable connection with the main body, and a sealing structure is formed between the inner wall of the sleeve and the outer wall of the main body; one end of the center rod assembly passes through the sleeve and enters the stepped hole, which includes a center rod upper section and a center rod lower section that are detachably connected together, and a quick-release structure that can control the disassembly of the center rod upper section and the center rod lower section, the outer end of the center rod upper section has a main sealing end, and the center rod assembly also forms a sealing structure with the sleeve; the gasket is sleeved on the outside of the center rod assembly, one end of which abuts the sleeve, and the other end extends to the main sealing end. The connector of the present invention has a quick-release structure. When disassembling the center rod upper section and the center rod lower section, it is only necessary to slide the sliding cover to loosen the ball bearing, and the center rod upper section and the center rod lower section can be quickly disassembled.

Description

Technical Field

[0001] This invention relates to a connector, specifically a connector with a quick-replacement sealing ring and an easily detachable retaining ring. Background Technology

[0002] The G15 connector is a pneumatic quick-sealing connector. Conventional G15 connectors have problems such as difficulty in replacing the sealing ring and difficulty in removing the retaining ring.

[0003] like Figure 1 As shown, Figure 1 This is the structure of the existing G15 connector. The main body 201 and the sleeve 202 are slidably connected and a sealing ring is provided at the connection. The central rod group 204 passes through the sleeve 202 and the main body 201 and extends out of the sleeve 202. The outer end of the central rod group 204 is provided with a sealing end. The sealing end is inserted into the test tube 203. First, gas is filled in from the eccentric hole, which moves the sleeve 202. The sleeve 202 presses against the sealing end to form a seal. Then, test gas is introduced into the test tube 203.

[0004] The shortcomings of the G15 connector in the prior art are as follows:

[0005] 1. Traditional G15 connectors have poor airtightness.

[0006] 2. When replacing the sealing ring, the retaining rings of the main body 201 and the sleeve 202 need to be removed with pliers before the sealing ring can be taken out, which is a rather cumbersome operation.

[0007] Therefore, the traditional G15 connector needs to be improved. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the present invention aims to provide a connector designed so that the upper and lower sections of the center rod can be disassembled without tools, allowing the sealing ring to be removed.

[0009] To solve the above technical problems, the present invention provides the following solution: A connector of the present invention includes:

[0010] The main body has a fluid hole penetrating both ends of the main body and a drive hole located eccentrically and penetrating both ends of the main body. The fluid hole has a stepped hole at its outlet end.

[0011] A sleeve is fitted into the air outlet of the main body at one end and forms a movable connection with the main body. The inner wall of the sleeve also forms a sealing structure with the outer wall of the main body.

[0012] A center rod assembly, one end of which passes through a sleeve and enters the stepped hole, includes a detachably connected upper and lower section of the center rod and a quick-release structure that can control the disassembly of the upper and lower sections of the center rod. The outer end of the upper section of the center rod has a main sealing end, and the center rod assembly also forms a sealing structure with the sleeve.

[0013] A washer, which is fitted over the center rod assembly, with one end abutting against the sleeve and the other end extending to the main sealing end.

[0014] Furthermore, a limiting groove is provided around the outer wall of the main body, and a first retaining ring is provided around the inner wall of the sleeve. The first retaining ring is embedded in the first retaining groove and is limited to move within the limiting groove.

[0015] Furthermore, the sealing structure formed between the inner wall of the sleeve and the outer wall of the main body is as follows: a first groove is provided on the outer wall of the main body at the air outlet end, and a second sealing ring is fitted on the first groove, the second sealing ring also abutting against the inner wall of the sleeve.

[0016] Furthermore, the center rod assembly also includes several balls, gaskets, a main sealing ring, a sliding cover, a second retaining ring, a first spring, a middle sleeve, a top column, and a second spring;

[0017] The middle sleeve has a first air passage extending through both ends, the first air passage including a movable cavity and a first narrow air passage communicating with the movable cavity;

[0018] The top column has a second air passage that extends through both ends, and is movably placed in the movable cavity. The column body of the top column passes through the first narrow air passage. The lower section of the central rod has a third air passage that extends through both ends, and has a receiving cavity and a second narrow air passage that communicates with the receiving cavity.

[0019] A third sealing ring is provided on the bottom ring surface of the receiving cavity, and the narrow end of the middle sleeve passes through the receiving cavity and abuts against the third sealing ring;

[0020] The lower section of the central rod has a plurality of ball bearing mounting holes arranged in a ring array on the wall of the second narrow air passage, and the ball bearing mounting holes are connected to the second narrow air passage. The plurality of balls are respectively installed in each ball bearing mounting hole.

[0021] The lower section of the central rod has its wide end passing through the sleeve and entering the stepped hole. A second spring is installed at the inner end of the stepped hole, and the second spring abuts against the top post. One end of the lower section of the central rod is limited in the groove of the stepped hole.

[0022] The outer wall of the narrow end of the lower section of the central rod is provided with an annular groove, and a second retaining ring is embedded in the annular groove. The sliding cover is sleeved on the lower section of the central rod and can slide on the lower section of the central rod. The sliding cover can block the ball mounting hole and open the ball mounting hole by movement. The sliding cover is limited by the second retaining ring to form an anti-detachment structure.

[0023] A first spring is fitted onto the lower section of the central rod. One end of the first spring abuts against the sleeve, and the other end abuts against the annular surface of the sliding cover. The upper section of the central rod has a concave ring on the outer wall of the end into which it is inserted. After the upper section of the central rod is inserted into the lower section, several balls are inserted into the concave ring and are pressed by the sliding cover and confined to the ball mounting holes, thereby forming a connection structure between the upper and lower sections of the central rod.

[0024] Furthermore, the inner ring of the sliding cover is provided with a relief groove. After the relief groove moves to the ball bearing mounting hole, it can release the ball bearings to form the quick-release structure. After the ball bearings are released, the upper section of the center rod can be disengaged from the lower section of the center rod.

[0025] Furthermore, the outer end of the upper section of the central rod is fitted with a gasket and a main sealing ring, wherein the main sealing ring is located on the outside and is restricted.

[0026] Furthermore, the washer has a cylindrical portion and a cylindrical portion connected to the cylindrical portion. The cylindrical portion is fitted over the sliding cover and has at least one cavity that can reach the sliding cover from the outside. The cylindrical portion is fitted onto the upper section of the central rod and abuts against the washer. The sliding cover can move within the cavity of the cylindrical portion and is confined within the cavity of the cylindrical portion.

[0027] Furthermore, a second retaining groove is provided inside the cavity of the cylindrical part, and a third retaining ring is engaged in the second retaining groove, which can block the sliding cover.

[0028] Furthermore, the sealing structure formed between the central rod assembly and the sleeve is as follows: a second groove is provided in the narrow hole of the sleeve, and a first sealing ring is embedded in the second groove, with the inner ring of the first sealing ring abutting against the outer wall of the lower section of the central rod.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. The connector of the present invention has a quick-release structure. When disassembling the upper section and the lower section of the center rod, it is only necessary to slide the sliding cover to release the ball bearings, and the upper section and the lower section of the center rod can be disassembled.

[0031] 2. After the upper and lower sections of the center rod are separated, when the upper section of the center rod is pulled out, the top column will move outward with the upper section of the center rod due to the action of the second spring, so that the ball is still in the clearance groove of the sliding cover and the sliding cover does not spring back. When replacing the new upper section of the center rod, the new upper section of the center rod can be inserted to allow the ball to fall into the groove of the upper section of the center rod. The sliding cover will spring back due to the action of the first spring and press the ball into the ball mounting hole. The upper and lower sections of the center rod form a fixed connection structure through the action of the ball.

[0032] 3. Add a limiting wire retaining ring to the washer to reduce the number of parts that need to be removed during disassembly.

[0033] 4. The main sealing ring of the present invention is easy to replace. After pulling out the upper section of the center rod, only the gasket and the main sealing ring need to be replaced. By using different lengths of the main sealing ring, a wider sealing range can be achieved. Attached Figure Description

[0034] Figure 1 This is a structural diagram of the G15 connector in the prior art.

[0035] Figure 2 This is a three-dimensional structural diagram of the connector of the present invention.

[0036] Figure 3 This is a cross-sectional view of the connector of the present invention.

[0037] Figure 4 This is a structural diagram of the main body of the present invention.

[0038] Figure 5 This is another structural view of the main body of the present invention.

[0039] Figure 6 This is a structural diagram of the sleeve of the present invention.

[0040] Figure 7 This is a structural diagram of the connector of the present invention after the sleeve is removed.

[0041] Figure 8 This is a structural diagram of the gasket of the present invention.

[0042] Figure 9 This is another structural view of the gasket of the present invention.

[0043] Figure 10 This is a structural diagram of the central rod assembly of the present invention.

[0044] Figure 11 This is a cross-sectional view of the sliding cover of the present invention.

[0045] Figure 12 for Figure 10 The structural diagram after removing the first spring and the sliding cover.

[0046] Figure 13 for Figure 12 Structural diagram with the lower section of the central rod removed.

[0047] Figure 14 This is a structural diagram showing the connection between the top column and the upper section of the central rod in this invention.

[0048] Figure 1 The markings in the text are: main body 201, sleeve 202, center rod assembly 204, and test tube 203.

[0049] Figures 2-13 The markings in the diagram are as follows: Main body 1, Sleeve 2, First sealing ring 3, Second sealing ring 4, Gasket 5, Main sealing ring 6, First retaining ring 8, Sliding cover 9, Second retaining ring 10, Washer 11, Ball bearing 12, Lower section of center rod 13, Upper section of center rod 14, First spring 15, Third sealing ring 16, Middle sleeve 17, Top column 18, Third retaining ring 19, Second spring 20, First notch 21, Second groove 22, First slot 23, Clearance groove 91, Center rod assembly 100, First groove 101, Drive hole 102, Fluid hole 103, Limiting groove 104, Second slot 111, Second notch 112, Column part 113, Air guide hole 114. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention. Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0051] Example 1: The specific structure of the present invention is as follows:

[0052] Please refer to the appendix. Figure 2-13 A connector according to the present invention includes:

[0053] The main body 1 has a fluid hole 103 penetrating both ends of the main body 1 and a drive hole 102 located in an eccentric position and penetrating both ends of the main body 1. The fluid hole 103 has a stepped hole at its outlet end.

[0054] Sleeve 2, one end of which is inserted into the air outlet end of the main body 1 and forms a movable connection with the main body 1, and the inner wall of sleeve 2 also forms a sealing structure with the outer wall of the main body 1;

[0055] A center rod assembly 100, one end of which passes through a sleeve 2 and enters the stepped hole, includes a detachably connected upper center rod section 14 and lower center rod section 13, and a quick-release structure that can control the disassembly of the upper center rod section 14 and lower center rod section 13. The outer end of the upper center rod section 14 has a main sealing end, and the center rod assembly 100 also forms a sealing structure with the sleeve 2.

[0056] Washer 11 is fitted over the center rod assembly 100, with one end abutting against the sleeve 2 and the other end extending to the main sealing end.

[0057] A preferred embodiment of the present invention is as follows: a limiting groove 104 is provided around the outer wall of the main body 1, and a first retaining ring 8 is embedded in the inner wall of the sleeve 2. The first retaining ring 8 is limited to move within the limiting groove 104.

[0058] A preferred technical solution of this embodiment is as follows: the sealing structure formed between the inner wall of the sleeve 2 and the outer wall of the main body 1 is: a first groove 101 is provided on the outer wall of the main body 1 at the air outlet end, and a second sealing ring 4 is fitted on the first groove 101, and the second sealing ring 4 also abuts against the inner wall of the sleeve 2.

[0059] A preferred embodiment of the present invention includes: the central rod assembly 100 further includes a plurality of balls 12, gaskets 5, a main sealing ring 6, a sliding cover 9, a second retaining ring 10, a first spring 15, a middle sleeve 17, a top column 18, and a second spring 20.

[0060] The middle sleeve 17 has a first air passage that extends through both ends. The first air passage includes a movable cavity and a first narrow air passage that communicates with the movable cavity.

[0061] The top column 18 has a second air passage that extends through both ends, and is movably placed in the movable cavity. The column body of the top column passes through the first narrow air passage. The lower section 13 of the central rod has a third air passage that extends through both ends, and has a receiving cavity and a second narrow air passage that communicates with the receiving cavity.

[0062] A third sealing ring 16 is provided on the bottom ring surface of the receiving cavity, and the narrow end of the middle sleeve 17 passes through the receiving cavity and abuts against the third sealing ring 16;

[0063] The lower section 13 of the central rod has a plurality of ball bearing mounting holes arranged in a ring array on the wall of the second narrow air passage, and the ball bearing mounting holes are connected to the second narrow air passage. The plurality of balls 12 are respectively installed in each ball bearing mounting hole.

[0064] The lower section 13 of the central rod has its wide end passing through the sleeve 2 and entering the stepped hole. A second spring 20 is installed at the inner end of the stepped hole. The second spring 20 abuts against the top post 18. One end of the lower section 13 of the central rod is limited in the groove of the stepped hole.

[0065] The outer wall of the narrow end of the lower section 13 of the central rod is provided with an annular groove, and a second retaining ring 10 is embedded in the annular groove. The sliding cover 9 is sleeved on the lower section 13 of the central rod and can slide on the lower section 13 of the central rod. The sliding cover 9 can block the ball mounting hole and open the ball mounting hole by movement. The sliding cover 9 is limited by the second retaining ring 10 to form an anti-detachment structure.

[0066] A first spring 15 is sleeved on the lower section 13 of the central rod. One end of the first spring 15 abuts against the sleeve 2, and the other end abuts against the annular surface of the sliding cover 9. The upper section 14 of the central rod has a concave ring on the outer wall of the end into the lower section 13 of the central rod. After the upper section 14 of the central rod is inserted into the lower section 13 of the central rod, it is trapped in the concave ring by a number of balls 12. The balls 12 are pressed by the sliding cover 9 and are limited to the ball mounting holes, thereby forming a connection structure between the upper section 14 of the central rod and the lower section 13 of the central rod.

[0067] In a preferred embodiment, the inner ring of the sliding cover 9 is provided with a relief groove 91. After the relief groove 91 moves to the ball mounting hole, it can release the plurality of balls 12 to form the quick-release structure. After the plurality of balls 12 are released, the upper section 14 of the center rod can be disengaged from the lower section 13 of the center rod.

[0068] In a preferred embodiment, the outer end of the upper section 14 of the central rod is fitted with a gasket 5 and a main sealing ring 6, wherein the main sealing ring 6 is located on the outside and is restricted.

[0069] In a preferred embodiment, the washer 11 has a cylindrical part and a cylindrical part 113 connected to the cylindrical part. The cylindrical part is fitted over the sliding cover 9 and has at least one cavity that can reach the sliding cover 9 from the outside. The cylindrical part 113 is fitted over the rod of the upper section 14 of the central rod and abuts against the gasket 5. The sliding cover 9 can move in the cavity inside the cylindrical part and is confined within the cavity inside the cylindrical part.

[0070] In a preferred embodiment, a second groove 111 is provided inside the cavity of the cylindrical part, and a third retaining ring 19 is engaged in the second groove 111. The third retaining ring 19 can block the sliding cover 9. A second notch 112 is also provided at the cavity opening of the cylindrical part, and the second notch 112 is used to remove the third retaining ring 19.

[0071] A preferred embodiment of the present invention is as follows: the sealing structure formed between the central rod assembly 100 and the sleeve 2 is as follows: a second groove 22 is provided in the narrow hole of the sleeve 2, and a first sealing ring 3 is embedded in the second groove 22, and the inner ring of the first sealing ring 3 abuts against the outer wall of the lower section 13 of the central rod.

[0072] The sleeve 2 is also provided with a first notch 21 at the wide end, through which the first retaining ring 8 can be seen and removed.

[0073] Example 2:

[0074] The following is the working principle of the connector of this invention:

[0075] I. Sealing Principle:

[0076] Insert the main sealing end of the connector of the present invention into the test tube 203, and fill it with gas through the drive hole 102 on the main body 1. The gas enters the inner cavity of the sleeve 2. The inner cavity formed between the sleeve 2 and the main body 1 is a closed cavity and the drive hole 102 is in an eccentric position. The filled gas acts on the bottom surface of the cavity of the sleeve 2. Since the sleeve 2 is a movable structure, it is pushed outward by the gas. The sleeve 2 pushes the washer 11, and the column part 113 at the front end of the washer 11 presses against the gasket 5. The gasket 5 then squeezes the main sealing ring 6. The main sealing ring 6 is deformed under force, so that the wall surface is tightly fitted with the test tube 203, and a sealing combination is achieved between the main sealing ring 6 and the test tube 203.

[0077] 2. Quickly replace the main sealing ring 6.

[0078] like Figure 2-3 As shown, the sliding cover 9 is pushed out a certain distance by the first spring 15 so that the ball bearing mounting hole is aligned with the relief groove 91. At this time, each ball bearing 12 is in a loose state, and the upper section 14 of the center rod is no longer resisted by the ball bearing 12. Therefore, the upper section 14 of the center rod is pulled outward. At the same time as the upper section 14 of the center rod is pulled outward, the second spring 20 exerts a force on the top post 18, and the top post 18 is no longer resisted. Its rod moves outward with the upper section 14 of the center rod until it reaches the ball bearing mounting hole. Each ball bearing 12 is still in the relief groove 91 and the ball bearing mounting hole due to the obstruction of the rod of the top post 18, so that the sliding cover 9 is restricted and cannot spring back to the initial position. This structure facilitates the insertion of the upper section 14 of the center rod after replacing the main sealing ring 6.

[0079] After the upper section 14 of the center rod is pulled out, the gasket 5 and the main sealing ring 6 are removed. After replacing the main sealing ring 6, the gasket 5 is put on, and then the upper section 14 of the center rod is inserted into the sleeve 2 and the sliding cover 9. The top column 18 is then tightened until the concave ring on the outer wall of the upper section 14 of the center rod reaches the ball mounting hole. At this time, each ball 12 can move, and the sliding cover 9 is no longer restricted by the balls 12. The elastic force of the first spring 15 causes the sliding cover 9 to move. The inner wall surface of the sliding cover 9, which is in contact with the lower section 13 of the center rod, covers the ball mounting hole, so that the balls 12 are restricted and cannot move. Part of the ball 12 is inserted into the concave ring of the upper section 14 of the center rod, and part of the ball is in the ball mounting hole. The lower section 13 of the center rod and the upper section 14 of the center rod are connected and fixed by each ball 12.

[0080] In summary, the connector of this invention features a quick-release structure. When disassembling the upper and lower sections of the center rod, simply slide the sliding cover 9 to release the ball bearings, thus disassembling the upper and lower sections of the center rod. After the upper and lower sections of the center rod are separated, pulling out the upper section causes the top post to move outward along with the upper section of the center rod via the action of the second spring, keeping the ball bearings within the clearance groove of the sliding cover and preventing the cover from springing back. When replacing the upper section of the center rod, inserting the new upper section allows the ball bearings to fall into the groove of the upper section. The sliding cover then springs back via the first spring, pressing the ball bearings into the ball bearing mounting hole. The upper and lower sections of the center rod form a fixed connection structure through the action of the ball bearings. A limiting wire retaining ring is added to the gasket 11 to reduce the number of parts removed during disassembly. The main sealing ring of this invention is easy to replace; after pulling out the upper section of the center rod, only the gasket and the main sealing ring need to be replaced. Different lengths of the main sealing ring can achieve a wider sealing range.

[0081] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A connector, characterized in that, include: The main body (1) has a fluid hole (103) penetrating both ends of the main body (1) and a drive hole (102) located at an eccentric position and penetrating both ends of the main body (1). The fluid hole (103) has a stepped hole at its outlet end. The sleeve (2) is inserted into the air outlet of the main body (1) at one end and forms a movable connection with the main body (1). The inner wall of the sleeve (2) also forms a sealing structure with the outer wall of the main body (1). A center rod assembly (100) is provided, one end of which passes through a sleeve (2) and enters the stepped hole. It includes a detachably connected upper center rod section (14) and lower center rod section (13) and a quick-release structure that can control the disassembly of the upper center rod section (14) and the lower center rod section (13). The outer end of the upper center rod section (14) has a main sealing end. The center rod assembly (100) also forms a sealing structure with the sleeve (2). Washer (11), which is fitted over the center rod assembly (100), with one end abutting against the sleeve (2) and the other end extending to the main sealing end.

2. The connector according to claim 1, characterized in that, A limiting groove (104) is provided on the outer wall of the main body (1), and a first retaining ring (8) is provided on the inner wall of the sleeve (2). The first retaining ring (8) is embedded in the first retaining groove (23) and is limited to move within the limiting groove (104).

3. A connector according to claim 1, characterized in that, The sealing structure formed between the inner wall of the sleeve (2) and the outer wall of the main body (1) is as follows: a first groove (101) is provided on the outer wall of the main body (1) at the air outlet end, and a second sealing ring (4) is fitted on the first groove (101), and the second sealing ring (4) also abuts against the inner wall of the sleeve (2).

4. A connector according to claim 1, characterized in that, The center rod assembly (100) also includes several balls (12), gaskets (5), main sealing rings (6), sliding covers (9), second retaining rings (10), first springs (15), middle sleeves (17), top posts (18), and second springs (20); The middle sleeve (17) has a first air passage that extends through both ends, the first air passage including a movable cavity and a first narrow air passage communicating with the movable cavity; The top column (18) has a second air passage that extends through both ends, and is movably placed in the movable cavity. The column body of the top column passes through the first narrow air passage. The lower section (13) of the central rod has a third air passage that extends through both ends, and has a receiving cavity and a second narrow air passage that communicates with the receiving cavity. A third sealing ring (16) is provided on the bottom ring surface of the receiving cavity, and the narrow end of the middle sleeve (17) passes through the receiving cavity and abuts against the third sealing ring (16); The lower section (13) of the central rod has a plurality of ball bearing mounting holes arranged in a ring array on the wall of the second narrow air passage, and the ball bearing mounting holes are connected to the second narrow air passage. The plurality of balls (12) are respectively installed in each ball bearing mounting hole. The lower section (13) of the central rod has its wide end passing through the sleeve (2) and entering the stepped hole. A second spring (20) is installed at the inner end of the stepped hole. The second spring (20) abuts against the top post (18). One end of the lower section (13) of the central rod is limited in the groove of the stepped hole. The outer wall of the narrow end of the lower section (13) of the central rod is provided with an annular groove, and a second retaining ring (10) is embedded in the annular groove. The sliding cover (9) is fitted onto the lower section (13) of the central rod and can slide on the lower section (13) of the central rod. The sliding cover (9) can block the ball mounting hole and open the ball mounting hole by movement. The sliding cover (9) is limited by the second retaining ring (10) to form an anti-detachment structure. A first spring (15) is fitted on the lower section (13) of the central rod. One end of the first spring (15) abuts against the sleeve (2), and the other end abuts against the annular surface of the sliding cover (9). The upper section (14) of the central rod has a concave ring on the outer wall of the end into which it is inserted. After the upper section (14) of the central rod is inserted into the lower section (13), it is trapped in the concave ring by a number of balls (12), and the balls (12) are pressed by the sliding cover (9) and confined to the ball mounting hole, thereby forming a connection structure between the upper section (14) of the central rod and the lower section (13) of the central rod.

5. A connector according to claim 4, characterized in that, The inner ring of the sliding cover (9) is provided with a relief groove (91). After the relief groove (91) moves to the ball mounting hole, it can release the ball (12) to form the quick release structure. After the ball (12) is released, the upper section (14) of the center rod can be disengaged from the lower section (13) of the center rod.

6. A connector according to claim 4, characterized in that, The outer end of the upper section (14) of the central rod is fitted with a gasket (5) and a main sealing ring (6), wherein the main sealing ring (6) is located on the outside and is restricted.

7. A connector according to claim 6, characterized in that, The washer (11) has a cylindrical part and a cylindrical part (113) connected to the cylindrical part. The cylindrical part is fitted over the sliding cover (9) and has at least one opening that can reach the sliding cover (9) from the outside. The cylindrical part (113) is fitted over the rod of the upper section (14) of the central rod and the cylindrical part (113) abuts against the gasket (5). The sliding cover (9) can move in the cavity inside the cylindrical part and the sliding cover (9) is confined in the cavity inside the cylindrical part.

8. A connector according to claim 7, characterized in that, The cavity of the cylindrical part is provided with a second groove (111), and a third retaining ring (19) is inserted in the second groove (111). The third retaining ring (19) can block the sliding cover (9).

9. A connector according to claim 1, characterized in that, The sealing structure formed between the central rod assembly (100) and the sleeve (2) is as follows: a second groove (22) is provided in the narrow hole of the sleeve (2), and a first sealing ring (3) is embedded in the second groove (22), and the inner ring of the first sealing ring (3) abuts against the outer wall of the lower section (13) of the central rod.

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