A quick connector

Abstract

The utility model provides a kind of quick connector, including shell, passage and valve structure are configured in shell, shell two ends are respectively configured as first connecting end and second connecting end;With external gas source or external liquid source or external container is connected using first connecting end or second connecting end;Male plug is connected with first connecting end or second connecting end;Valve structure includes valve core, using valve structure control passage conduction / cutoff between first connecting end and second connecting end;The end of shell is arranged with locking mechanism, and locking / separation between shell and male plug is realized using locking mechanism.The utility model has beneficial effects: the size of connector is effectively controlled, so that connector can be applied to more narrow use space use scene, using the claw structure that contact surface is more smooth, non-metal material made claw can also be used according to actual use demand, further reduce the damage to male plug.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical structures, and in particular relates to a quick connector. Background Technology

[0002] Existing quick connectors often limit their application in confined spaces due to their excessive size (especially in diameter and length). This stems from the need to integrate multiple key functions within a limited space: enabling quick insertion and removal, incorporating reliable valves to prevent backflow, ensuring high fluid flow rates, and accommodating the large dimensional tolerances of male connectors when used as female connectors. Furthermore, to prevent scratching or indentation of soft materials (such as aluminum alloy) during connection, their guiding structure (such as ball bearings) requires special consideration (e.g., using flexible claws) to reduce the risk of damage.

[0003] However, existing designs often struggle to achieve the aforementioned performance while controlling overall size. For example, adding components to prevent seal failure or meet operational requirements often sacrifices compactness; simultaneously, the risk of damage to the male connector caused by the guiding structure has not been effectively addressed. Therefore, there is an urgent need to develop a new quick connector structure that meets multiple performance requirements, has a simple structure, maintains a compact form factor, and avoids damage to the male connector. Utility Model Content

[0004] In view of this, the present invention aims to provide a quick connector to at least solve one of the problems in the prior art.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A quick connector includes a housing, within which a passage and valve structure are disposed, and the two ends of the housing are respectively configured as a first connection end and a second connection end;

[0007] Connect to an external gas source, external liquid source, or external container using the first or second connection end;

[0008] The male plug connects to either the first or second connector.

[0009] The valve structure includes a valve core, which controls the opening / closing of the passage between the first connection end and the second connection end. Specifically, in response to the male plug being inserted into the housing, the passage between the first connection end and the second connection end is opened through the valve structure; in response to the male plug being removed from the housing, the passage between the first connection end and the second connection end is cut off by the valve structure.

[0010] A locking mechanism is provided at the end of the housing to lock / unlock the housing and the male plug.

[0011] Furthermore, the housing includes a claw fixing seat and a rear connecting seat, and a first sealing ring is provided between the connecting parts of the claw fixing seat and the rear connecting seat.

[0012] Furthermore, the outer wall of the tail of the valve core is recessed inward to form a first receiving cavity, and the first receiving cavity has an opening at the end facing the housing;

[0013] The first end of the first spring is disposed in the first receiving cavity, and the other end extends out from the opening of the first receiving cavity (51) and abuts against the inner wall of the housing.

[0014] Furthermore, a retaining ring is provided on the outer side of the first receiving cavity of the valve core, and the stop block is limited between the retaining ring and the claw fixing seat;

[0015] Furthermore, the stop block is replaced with a protection mechanism, which is limited between the stop ring and the claw fixing seat. The first end of the protection mechanism forms a second receiving cavity with the outer side of the first receiving cavity of the valve core to receive the second sealing ring to be protected. The second end of the protection mechanism abuts against the housing through a second spring, and the second sealing ring is disposed between the valve core and the claw fixing seat.

[0016] Furthermore, a sealing ring is provided at the end of the valve core away from the first receiving cavity, which contacts the male plug, and a through hole is provided on the valve core body on the side of the second sealing ring facing the sealing ring.

[0017] Preferably, the angle between the centerline of the through hole and the centerline of the valve core is 30°-60°.

[0018] Furthermore, the locking mechanism includes an outer sleeve disposed on the outside of the claw fixing seat, and the outer sleeve is disposed at the junction of the claw fixing seat and the rear connecting seat;

[0019] The outer tube has a third receiving cavity for accommodating the third spring. One end of the third spring abuts against the inner wall of the third receiving cavity, and the other end abuts against the rear connecting seat.

[0020] Furthermore, a receiving groove for accommodating the claw is provided on the edge of the claw fixing seat near the male plug end;

[0021] The jaws can move radially, wherein: the outer sleeve limits the jaws on the outside, and the valve core or male plug limits the jaws on the inside;

[0022] The inner wall of the outer tube is equipped with a clamping block, which applies force to the jaws.

[0023] Furthermore, the chuck has an inverted conical structure, and the corresponding opening of the receiving groove has a taper, with the outer opening of the receiving groove being larger than the inner opening.

[0024] Furthermore, the second spring is nested outside the first spring, and the first spring and the second spring are coaxially sleeved.

[0025] Furthermore, the grippers are made of non-metallic materials.

[0026] Furthermore, the number of grippers must be no less than two;

[0027] Furthermore, the number of grippers is 6.

[0028] Furthermore, the chuck fixing seat and the rear connecting seat are connected by a threaded structure.

[0029] Compared with the prior art, the quick connector described in this utility model has the following advantages:

[0030] (1) The quick connector described in this utility model mentions two implementation methods for the component settings of the second sealing ring. One is to set a stop for limiting the second sealing ring, and the other is to set a protective structure with the function of limiting and protecting the second sealing ring. By setting the protective mechanism, it can prevent high-speed fluid from pushing the second sealing ring at the gas / liquid inlet and outlet from the correct position, thereby preventing gas / liquid leakage around the valve core that may occur when the valve core is completely cut off due to the failure of the second sealing ring. In addition, the second spring in this solution that abuts against the protective mechanism is located in an empty part of the connector structure, and the size of the connector will not increase due to the setting of the second spring, further improving the utilization rate of the limited space inside the connector.

[0031] (2) The quick connector described in this utility model, by coaxially sleeved the second spring on the outside of the first spring, increases the function of protecting the O-ring by using the second spring in conjunction with the protection mechanism without increasing the size. At the same time, the center line of the through hole is inclined relative to the center line of the valve core, which can make full use of the internal space, increase the flow capacity while reducing the axial dimension.

[0032] (3) In addition, the tail of the valve core is recessed inward to provide a first receiving cavity for accommodating the first spring. After docking, the first spring is compressed into the first receiving cavity and does not occupy the flow channel space, so that the connector can be used in a space-constrained application scenario. In addition, the setting of the retaining ring structure in this solution can maintain the integrity of the valve core or the claw fixing seat. Compared with the prior art, which does not set the retaining ring structure, the valve core or the claw fixing seat is usually a split structure. The two need to be connected by threads, otherwise it cannot be installed, resulting in the overall size of the connector becoming larger. Compared with the prior art, this solution effectively controls the size of the connector by setting the retaining ring structure.

[0033] (4) The quick connector described in this utility model addresses the problem of damage to the male plug caused by the ball bearing structure in existing connectors. This solution adopts a claw structure with a smoother contact surface to avoid damage to the male plug. In addition, claws made of non-metallic materials can be used according to actual usage requirements to further reduce damage to the male plug.

[0034] (5) The quick connector described in this utility model does not restrict the direction of the fluid during actual use. That is, the fluid can pass through the valve body from the forward or reverse direction. Compared with the prior art, this improves the versatility of the product and can be applied to more usage scenarios. Attached Figure Description

[0035] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0036] Figure 1 This is a schematic diagram of the overall structure (before the male plug is inserted) according to an embodiment of the present utility model;

[0037] Figure 2 This is a schematic diagram of the overall structure (after the male plug is inserted) according to an embodiment of the present utility model;

[0038] Figure 3 This is a three-dimensional structural diagram of the overall structure described in the embodiment of this utility model;

[0039] Figure 4 This is a schematic cross-sectional view of the three-dimensional structure described in the embodiment of this utility model;

[0040] Figure 5 This is a schematic diagram of the assembly of the claw fixing seat and the rear connecting seat according to an embodiment of the present utility model;

[0041] Figure 6 This is a schematic diagram of the rear connecting seat structure according to an embodiment of the present utility model;

[0042] Figure 7 This is a schematic diagram of the first angle of the valve core according to an embodiment of the present utility model;

[0043] Figure 8 This is a schematic diagram of the second angle of the valve core according to an embodiment of the present utility model;

[0044] Figure 9 This is a schematic diagram showing the installation position of the stop component before the male plug is inserted, as described in an embodiment of this utility model.

[0045] Figure 10 This is a schematic diagram showing the installation position of the stop component after the male plug is inserted, as described in an embodiment of this utility model.

[0046] Figure 11 This is a schematic diagram of the assembly structure of the receiving groove and the claw described in an embodiment of the present utility model;

[0047] Figure 12This is a schematic diagram of the first chamfer structure and the second chamfer structure described in an embodiment of the present utility model;

[0048] Figure 13 This is a schematic diagram of the internal partial structure of an embodiment of the present utility model.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Male plug; 11. Annular flange; 2. Claw fixing seat; 21. First sealing ring; 22. Receiving groove; 23. Third sealing ring; 3. Rear connector; 31. Rear connector body; 32. Connector structure; 4. Outer sleeve; 41. Clamping block; 42. Third receiving cavity; 43. Third spring; 44. Second chamfer structure; 5. Valve core; 51. First receiving cavity; 52. First spring; 53. Second sealing ring; 54. Sealing rubber ring; 55. Through hole; 6. Claw; 61. First chamfer structure; 7. Protection mechanism; 71. Second receiving cavity; 72. Second spring; 73. Retaining ring; 8. Stop block; Detailed Implementation

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0052] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0053] This solution discloses a quick connector, which, for ease of description, will be referred to as such in the following description. Figure 1 To describe orientation for a standard view, for example, the left end is... Figure 1 The left and right ends are Figure 1 On the right, the quick connector serves as a female plug structure that mates with the male plug 1. The main structure includes a main structure consisting of a claw fixing seat 2 and a rear connecting seat 3. The claw fixing seat 2 and the rear connecting seat 3 can be connected by a threaded structure or other structures. The rear connecting seat 3 structure includes a rear connecting seat body 31 and a connector structure 32. The connector structure can be arranged on the side or rear of the rear connecting seat body according to actual usage requirements. The connector structure coincides with or has an angle with the center line of the rear connecting seat body.

[0054] The housing is equipped with passages. In actual use, taking tank A as an example, tank A can be configured with one or more of the connectors mentioned in this solution according to actual usage requirements. Taking one connector as an example, one end of the connector is connected to tank A, and the other end is connected to an external pressure source (including but not limited to a gas source or liquid source) or an external container. The external pressure source or external container is connected to tank A through male plug 1. Taking two connectors as an example, tank A is equipped with two connectors mentioned in this solution. One connector serves as the input end to tank A, and the other serves as the output end to tank A. Similarly, tank A can be configured with no less than two connectors mentioned in this solution according to actual usage requirements. For example, multiple connectors can be used to simultaneously input or output fluid to tank A.

[0055] One end of the housing is configured to connect to an external gas / liquid source, and the other end is configured to connect to male plug 1. The first connection end and the second connection end are connected through a passage. In actual use, either the first connection end or the second connection end of the housing can be configured to connect to a gas / liquid source according to actual use requirements, and the other end can be configured as a container. In actual use, the same container can also be connected to two connector structures mentioned in this solution, with one connector structure serving as the container's inlet and the other as the outlet.

[0056] The passage is equipped with a valve core 5 structure for controlling the passage opening or closing. The specific structure of the valve core 5 is shown in the figure. When the male plug 1 is not in contact with the valve core 5 or the sealing ring 54, after the valve core 5 returns to its original position, the second sealing ring 53 separates the inner cavities at both ends, preventing the fluid on the right side from flowing out. At this time, the through hole 55 is in a completely closed state (i.e., no fluid passes through the through hole 55). (For ease of subsequent description, the closed through hole 55 is referred to as the valve core 5 completely cut off state). In this scheme, a third sealing ring 23 is provided between the claw fixing seat 2 and the valve core 5.

[0057] When the male plug 1 moves into the passage along the axis (defined as the X-axis direction) of the valve core 5, the male plug 1 contacts the sealing ring 54 installed at the end of the valve core 5. As the male plug 1 continues to move, the thrust applied by the male plug 1 to the valve core 5 (the structure of the valve core 5 is shown in the figure, which has a first receiving cavity 51 structure, and the first spring 52, which serves as the return spring of the valve core 5, has one end placed in the first receiving cavity 51 and the other end abutting against the inner wall of the housing, specifically against the inner side wall of the rear connecting seat 3 as shown in the figure) will gradually compress the first spring 52. At this time, the valve core 5 moves along the X-axis direction. During the movement, the through hole 55 on the valve core 5, which was originally blocked by the right end of the claw fixing seat 2, gradually moves horizontally towards the rear connecting seat 3. When it moves to the appropriate position, the through hole 55 on the valve core 5 gradually connects with the rear connecting seat 3. At this time, gas / liquid can be transmitted between the first end and the second end of the housing through the through hole 55 on the valve core 5. After the male plug 1 is inserted into the preset position, the through hole 55 is fully connected (for ease of subsequent description, the fully connected through hole 55 is referred to as the fully connected state of valve core 5). At this time, the first spring 52 is in a compressed position close to the limit of movement.

[0058] When the valve core 5 is in the fully open state, as the male plug 1 pushes the valve core 5, the protection mechanism 7 also moves along the X-axis with the valve core 5. The second spring 72 installed between the protection mechanism 7 and the rear connecting seat 3 is also compressed. The structure of the protection mechanism 7 is shown in the figure. The left end of the protection mechanism 7 is provided with a second receiving chamber structure to facilitate the accommodation of the second sealing ring 53. When the valve core 5 is in the fully cut-off state, the protection mechanism 7 is in a stationary state. However, as the male plug 1 applies force to the valve core 5, and the valve core 5 moves along the X-axis, the second spring 72 will exert a force on the protection mechanism 7 in the opposite direction to the movement of the valve core 5. The protection mechanism 7 will move along the outer column of the tail of the valve core 5 towards the male plug 1. At this time, the second receiving chamber of the protection mechanism 7 gradually covers the second sealing ring 53, thereby protecting the second sealing ring 53. As the valve core 5 is gradually squeezed by the male plug 1 to the fully open state, the second sealing ring 53... The entire assembly is housed within the second containment chamber. The purpose of the protective mechanism 7 in this design is to prevent damage or misalignment of the second sealing ring 53 due to direct impact from gas / liquid during use. Based on practical experience, the first spring 52 in this design has a larger stiffness coefficient than the second spring 72. A retaining ring 73 for limiting movement is provided between the tail of the protective mechanism 7 and the tail of the valve core 5. The purpose of the retaining ring 73 is that without it, the valve core 5 and the stop block 8 / protective mechanism 7 would need to be separated into two parts for assembly. Without the retaining ring, the following problems would arise: 1. To connect the valve core 5 and the stop block 8 / protective mechanism 7, a threaded connection would be required, resulting in a larger overall connector size and hindering dimensional control; 2. Without a threaded connection, the two components would require an interference fit, making disassembly impossible after assembly.

[0059] Furthermore, this solution proposes two embodiments for the seven parts of the protection mechanism, one of which is as follows: Figure 9 and Figure 10As shown, a retaining ring 73 is provided on the outer side of the first receiving cavity 51 of the valve core 5, and the stop block 8 is limited between the retaining ring 73 and the claw fixing seat 2. At this time, the function of the stop block 8 is to limit the tendency of the valve core 5 to move to the left when the male plug 1 is not inserted. In another embodiment, the stop block 8 can be replaced by a protective mechanism 7. The protective mechanism 7 is limited between the retaining ring 73 and the claw fixing seat 2. The first end of the protective mechanism 7 and the outer side of the first receiving cavity 51 of the valve core 5 form a second receiving cavity 71 for accommodating the second sealing ring 53 to be protected. The second end of the protective mechanism 7 abuts against the housing through the second spring 72. The second sealing ring 53 is disposed between the valve core 5 and the claw fixing seat 2. At this time, the function of the protective mechanism 7 is that when the valve is opened after the male and female plugs are inserted, the protective mechanism 7 slides down to the left side under the action of the spring 72 to cover the O-ring 53 and prevent it from being blown out.

[0060] Furthermore, the locking mechanism mentioned in this solution serves to securely lock the male plug 1 within the connector after it is fully inserted into the connector, using the locking mechanism in conjunction with the claw 6. When the male plug 1 needs to be separated from the connector, the locking mechanism needs to be unlocked to release the claw 6, facilitating the separation of the male plug 1 from the connector. The specific structure of the locking mechanism includes: an outer sleeve 4 located outside the claw fixing seat 2, situated at the junction of the claw fixing seat 2 and the rear connecting seat 3. The outer sleeve 4 contains a third receiving cavity 42 for accommodating a third spring 43. One end of the third spring 43 abuts against the inner wall of the third receiving cavity 42, and the other end abuts against the rear connecting seat 3. As shown in the cross-sectional view in the attached diagram, a pressing block 41 is provided on the inner wall of the outer sleeve 4. The pressing block 41 engages with the outer surface of the claw 6 to achieve pressing, limiting, and releasing of the claw 6. The operation of the locking mechanism is as follows:

[0061] The male plug 1 has the structure shown in the figure. The head of the male plug 1 has an outwardly protruding annular flange 11. This annular flange structure includes, but is not limited to, two ramps as shown in the figure. The purpose of the annular flange structure is to cooperate with the claw 6, using the claw 6 to limit the annular flange structure, thereby limiting the male plug 1. The specific operation is as follows: After the male plug 1 is fully inserted into the connector, a locking mechanism is needed to lock the male plug 1, and the outer sleeve 4 is reset to its initial position (defined as the position of the outer sleeve 4 when not in contact with the male plug). This can be achieved by applying force or by using… The third spring 43, which has been compressed in the unlocked state, resets itself to return the outer sleeve 4 to its original position. After returning to its original position, the locking mechanism is in the locked state. At this time, the pressing block 41 presses the claw 6 from the outside to the inside. The claw 6 is pressed inward (in actual use, the positional relationship between the claw 6 and the male plug in the locked state can be: ① close to the outer wall of the male plug 1 to improve the stability of the connection; ② with a gap fit between the claw 6 and the outer wall of the male plug 1 to adapt to male plugs 1 of different sizes). When the male plug 1 needs to be disengaged from the connector, the locking mechanism needs to be unlocked and released. The operating principle is the same as above.

[0062] Furthermore, to facilitate the insertion and removal of the male plug 1, the claw 6 in this design is provided with a chamfered first chamfer structure 61, as shown in the figure. The function of the chamfer structure 61 can be summarized as follows: in the locked state, it serves as a force-bearing surface for contacting / abutting with the male plug 1; when the male plug 1 is removed from the connector, it serves as a guide. If this part does not have a chamfered connector 61 and uses a right-angle structure, jamming may occur during the removal process, which may cause the claw 6 to fail to expand automatically. Similarly, a second chamfer structure 44 is provided at the clamping block 41 of the outer tube 4. When the outer tube 4 moves, due to the setting of the second chamfer structure 44, it facilitates the contact between the clamping block 41 and the claw and avoids jamming between the two, thus preventing the movement of the outer tube 4.

[0063] In summary, this solution protects the second sealing ring 53 at the gas / liquid inlet / outlet by setting the protection mechanism 7, thus preventing gas / liquid leakage around the valve core 5 when the valve core 5 is completely cut off due to the failure of the second sealing ring 53. Furthermore, by spatially mounting the second spring 72 that triggers the protection mechanism 7 outside the first spring 52, the overall connector size is avoided from becoming longer due to the second spring 72, making full use of space and effectively controlling the connector size, allowing the connector to be used in more confined spaces. In addition, addressing the problem of damage to the male plug 1 caused by the ball bearing structure guiding the male plug 1 in existing connectors, this solution uses a claw 6 structure with a smoother contact surface to avoid damage to the male plug 1. Furthermore, according to actual usage requirements, claw 6 made of non-metallic material can be used to further reduce damage to the male plug 1.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick connector, characterized in that: It includes a housing, which contains a passage and a valve structure, and the two ends of the housing are respectively configured as a first connection end and a second connection end; Connect to an external gas source, external liquid source, or external container using the first or second connection end; The male plug (1) is connected to either the first or second connection terminal; The valve structure includes a valve core (5), which controls the opening / closing of the passage between the first connection end and the second connection end. A locking mechanism is provided at the end of the housing to lock / separate the housing from the male plug (1).

2. A quick connector according to claim 1, characterized in that: The housing includes a claw fixing seat (2) and a rear connecting seat (3), and a first sealing ring (21) is provided between the connecting parts of the claw fixing seat (2) and the rear connecting seat (3); Preferably, the rear connector (3) structure includes a rear connector body (31) and a connector structure (32). The connector structure (32) is arranged on the side or rear of the rear connector body (31). The connector structure (32) coincides with or has an angle with the center line of the rear connector body (31). Preferably, the angle between the connector structure (32) and the rear connector body (31) is 90°.

3. A quick connector according to claim 1, characterized in that: The outer wall of the tail of the valve core (5) is recessed inward to form a first receiving cavity (51), and the first receiving cavity (51) has an opening at the end facing the housing; The first end of the first spring (52) is disposed in the first receiving cavity (51), and the other end extends out from the opening of the first receiving cavity (51) and abuts against the inner wall of the housing.

4. A quick connector according to claim 1, characterized in that: A retaining ring (73) is provided on the outside of the first receiving cavity (51) of the valve core (5); The stop (8) is limited between the retaining ring (73) and the claw fixing seat (2); The second sealing ring (53) is disposed between the valve core (5) and the claw fixing seat (2); Preferably, the stop (8) is replaced with a protective mechanism (7), which is limited between the retaining ring (73) and the claw fixing seat (2); Preferably, a second receiving cavity (71) for receiving the second sealing ring (53) to be protected is formed between the first end of the protection mechanism (7) and the outside of the first receiving cavity (51) of the valve core (5), and the second end of the protection mechanism (7) abuts against the housing through the second spring (72).

5. A quick connector according to claim 4, characterized in that: A sealing ring (54) is provided at the end of the valve core (5) away from the first receiving cavity (51) to contact the male plug (1); Preferably, the valve core (5) body is provided with a through hole (55) located on the side of the second sealing ring (53) facing the sealing rubber ring (54); Preferably, the angle between the centerline of the through hole (55) and the centerline of the valve core (5) is 30°-60°.

6. A quick connector according to claim 1, characterized in that: The locking mechanism includes an outer sleeve (4) disposed on the outside of the claw fixing seat (2), and the outer sleeve (4) is disposed at the junction of the claw fixing seat (2) and the rear connecting seat (3); The outer tube (4) is provided with a third receiving cavity (42) for accommodating the third spring (43). One end of the third spring (43) abuts against the inner wall of the third receiving cavity (42), and the other end abuts against the rear connecting seat (3).

7. A quick connector according to claim 6, characterized in that: The claw fixing seat (2) has a receiving groove (22) for accommodating the claw (6) on the edge near the male plug (1); The claw (6) can move radially, wherein: the outer sleeve (4) limits the claw (6) on the outside, and the valve core (5) or male plug (1) limits the claw (6) on the inside; The inner wall of the outer sleeve (4) is provided with a clamping block (41), and the clamping block (41) is used to apply force to the claw (6); Preferably, the claw (6) has an inverted conical structure, and the opening of the corresponding receiving groove (22) has a taper, with the outer opening of the receiving groove (22) being larger than the inner opening.

8. A quick connector according to claim 3 or 4, characterized in that: The second spring (72) is nested outside the first spring (52), and the first spring (52) and the second spring (72) are coaxially sleeved.

9. A quick connector according to claim 7, characterized in that: The claw (6) is made of non-metallic material.

10. A quick connector according to claim 7, characterized in that: The number of claws (6) shall not be less than two; Preferably, the number of grippers is 6.

Images