Manual locking quick plug connector

Abstract

The manual locking quick plug connector comprises a connector body and a lock catch, the connector body is provided with a connecting channel used for being connected with an opponent piece, two first openings which are oppositely arranged are formed in the side wall of the connector body, and a locking block is arranged on the connector body; the lock catch comprises a U-shaped lock catch body, an opening part is arranged on the inner side of the lock catch body, at least part of the opening part is located in the connecting channel, an inclined face is arranged on the side, facing the opponent piece, of the opening part, and a spring bolt is arranged at the opening end of the lock catch body; the lock catch has an initial state and a locking state, in the initial state, the lock catch is separated from the connector body, in the locking state, the lock catch body is inserted into the first opening, and the spring bolt is connected with the locking block in a clamped mode. According to the manual locking quick plug connector, a worker can visually judge whether the lock catch and the connector body are correctly clamped or not, the situation that connection is not firm or not caused by misjudgment of the connection state is avoided, and potential safety hazards are reduced.

Description

Technical Field

[0001] This application relates to the field of automotive manufacturing technology, and in particular to a manually locking quick-connect connector. Background Technology

[0002] A car's fuel system or ventilation system contains many pipes, and two interconnected pipes are connected by a connector. The connector includes a female connector, a male connector, and a locking clip. One pipe is fixedly connected to the female connector, and the other pipe is fixedly connected to the male connector. After the male connector is inserted into the female connector, the locking clip secures the two pipes together, thus establishing the connection between them.

[0003] In existing technologies, quick-connect connectors typically employ an automatic locking structure. The core principle is that a spring-loaded latch automatically locks the connector when the male connector is inserted. For example, when the male connector is inserted into the female connector, the latch engages with the male connector's groove under the force of the spring, securing the connection. The advantage of this design is its ease of operation, requiring no manual intervention to lock. However, with an automatic locking structure, operators cannot visually determine whether the latch is correctly engaged. This could lead to misjudgment of the connection status, resulting in an insecure or non-connected connection, posing a safety hazard. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a manually locking quick-connect connector for visually determining the connection status of the connector, preventing loose connections or disconnections, and eliminating safety hazards.

[0005] A first aspect of this application provides a manually locking quick-connect connector, comprising:

[0006] The connector body has a connecting channel for connecting a pair of parts. The side wall of the connector body has two opposing first openings that communicate with the connecting channel. The connector body is provided with a locking block that is opposite to the position of the first opening.

[0007] The latch includes a U-shaped latch body, which is an elastic element. An opening portion is provided on the inner side of the latch body, at least partially located within the connecting channel. The opening portion has an inclined surface facing the opposing component. Two opposing locking tongues are provided at the open end of the latch body. The latch has an initial state and a locked state. In the initial state, the latch is separated from the connector body. In the locked state, the latch body is inserted into the first opening, and the locking tongues engage with the locking block.

[0008] In one possible implementation, a first guide surface is provided on the side of the latch away from the opening portion, and the first guide surface is located on opposite sides of the two latches.

[0009] In one possible implementation, the latch body is connected to two opposing limiting plates, the connector body has two opposing second openings, the limiting plates are slidably connected to the second openings, and the locking member is provided with a first annular boss. When the latch is in the locked state, the limiting plate abuts against the end of the first annular boss away from the latch body.

[0010] In one possible implementation, the limiting plate is provided with buckles on both sides, and the buckles are slidably connected to the second opening.

[0011] In one possible implementation, a second annular boss is provided on the outer side of the hand member. The outer diameter of the second annular boss is greater than the distance between it and the two spreading portions, and less than the outer diameter of the first annular boss.

[0012] In one possible implementation, the limiting plate is provided with a first limiting portion protruding toward the latch body. The first limiting portion is arc-shaped and matches the size of the first annular boss. The first limiting portion abuts against the end of the first annular boss that is away from the latch body.

[0013] In one possible implementation, the thickness of the first limiting portion gradually decreases at the end near the first annular boss to form a second guide surface.

[0014] In one possible implementation, the latch body is provided with a second limiting part, which is located at one end of the latch body away from the latch tongue, and in the locked state, the second limiting part abuts against the side of the first annular boss.

[0015] In one possible implementation, the inner wall of the connector body is provided with a safety ring, a first sealing ring, an isolation ring, and a second sealing ring, and the first opening, the safety ring, the first sealing ring, the isolation ring, and the second sealing ring are arranged sequentially along the insertion direction of the connector.

[0016] In one possible implementation, the safety ring has a plurality of deformation grooves along its circumference, and the deformation grooves are located on the inner side of the safety ring.

[0017] In one possible implementation, the inner wall of the connector body is provided with a limiting boss and a limiting groove, and the outer side of the safety ring is provided with an annular protrusion that matches the limiting groove. The first sealing ring, the isolation ring, and the second sealing ring are located between the limiting boss and the safety ring.

[0018] The manual locking quick-connect connector provided in this application embodiment has an opening portion on the inner side of the locking body. At least part of the opening portion is located within the connection channel, and the side facing the locking member is sloped. The opening end of the locking body has a locking tongue, and the connector body has a locking block that cooperates with the locking tongue. Initially, the locking body is separated from the connector body. When connecting the locking member to the connector body, the locking member is inserted into the connection channel of the connector body. Under the pressure of the locking member, the opening portion causes the U-shaped locking body to open to both sides. If the insertion depth of the locking member is insufficient, the width of the two locking tongues will be insufficient, and the locking tongues will be blocked by the locking block. When the operator manually presses the locking body, the locking tongues cannot engage with the locking block. When the locking member is fully inserted, the two locking tongues reach the required opening width. When the operator manually presses the locking body, the two locking tongues can pass over the locking block and engage with it, achieving a locked state and realizing a reliable connection between the locking member and the connector body. With this solution, staff can visually determine whether the latch and connector body are properly engaged, avoiding misjudgment of the connection status that could lead to an insecure or non-connected connection, thus reducing safety hazards. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] Figure 1 A schematic diagram of the structure of the manual locking quick-connect connector provided in this application;

[0021] Figure 2 A schematic diagram of the structure of the counterpart provided in this application;

[0022] Figure 3 A top view of the manually locking quick-connect connector provided in this application;

[0023] Figure 4 for Figure 3 AA section view in the middle;

[0024] Figure 5 A schematic diagram of the main body of the manually locking quick-connect connector provided in this application;

[0025] Figure 6 A schematic diagram of the locking mechanism in the manual locking quick-connect connector provided in this application;

[0026] Figure 7 A schematic diagram of the locking mechanism in the manual locking quick-connect connector provided in this application from another perspective;

[0027] Figure 8 A schematic diagram illustrating the connection between the locking tongue and the locking block provided in this application;

[0028] Figure 9 A schematic diagram of the safety ring provided in this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Connector body; 11. Connecting channel; 12. First opening; 13. Second opening; 14. Locking block; 15. Limiting groove; 16. Limiting boss; 2. Lock; 21. Lock body; 211. Spreading part; 212. Lock tongue; 2121. First guide surface; 213. Second limiting part; 22. Limiting plate; 221. First limiting part; 2211. Second guide surface; 222. Buckle; 3. Safety ring; 31. Deformation groove; 32. Annular protrusion; 4. First sealing ring; 5. Isolation ring; 6. Second sealing ring; 7. Hand piece; 71. First annular boss; 72. Second annular boss.

[0030] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0031] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0032] Secondly, it should be noted that, in the description of the embodiments of this application, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0033] A car's fuel system or ventilation system contains many pipes, and two interconnected pipes are connected by a connector. The connector includes a female connector, a male connector, and a locking clip. One pipe is fixedly connected to the female connector, and the other pipe is fixedly connected to the male connector. After the male connector is inserted into the female connector, the locking clip secures the two pipes together, thus establishing the connection between them.

[0034] In related technologies, quick-connect connectors typically employ an automatic locking structure. The core principle is that a spring-loaded latch automatically locks the connector when the male connector is inserted. For example, when the male connector is inserted into the female connector, the latch engages with the male connector's groove under the force of the spring, securing the connection. The advantage of this design is its ease of operation, requiring no manual intervention to lock. However, with an automatic locking structure, operators cannot visually determine whether the latch is correctly engaged. This could lead to misjudgment of the connection status, resulting in an insecure or non-connected connection, posing a safety hazard.

[0035] To address the aforementioned issues, this application provides a manually locking quick-connect connector, comprising a connector body and a latch. The connector body has a connecting channel for connecting to a counterpart component. Two opposing first openings are formed on the side wall of the connector body, communicating with the connecting channel. A locking block is provided on the connector body opposite to the openings. The latch includes a U-shaped latch body, which is an elastic element. An opening portion is provided on the inner side of the latch body, at least partially located within the connecting channel. The opening portion has an inclined surface facing the counterpart component. Two opposing locking tongues are provided at the open end of the latch body. The latch has an initial state and a locked state. In the initial state, the latch is separated from the connector body. In the locked state, the latch body is inserted into the first opening, and the locking tongues engage with the locking block.

[0036] The manual locking quick-connect connector provided in this application features a spreading portion on the inner side of the locking body, at least partially located within the connection channel, with an angled surface facing the locking member. The opening end of the locking body has a locking tongue, and the connector body has a locking block that engages with the locking tongue. Initially, the locking mechanism is separate from the connector body. To connect the locking member to the connector body, the locking member is inserted into the connection channel. Due to the angled surface of the spreading portion facing the locking member, the spreading portion, under the pressure of the locking member, causes the U-shaped locking body to open to both sides. If the insertion depth of the locking member is insufficient, the width of the two locking tongues will be insufficient, and the locking tongues will be blocked by the locking block. When the operator manually presses the locking mechanism, the locking tongues cannot engage with the locking block. When the locking member is fully inserted, the two locking tongues reach the required opening width. When the operator manually presses the locking mechanism, the two locking tongues can pass over the locking block and engage with it, achieving a locked state and ensuring a reliable connection between the locking member and the connector body. With this solution, staff can visually determine whether the latch and connector body are properly engaged, avoiding misjudgment of the connection status that could lead to an insecure or non-connected connection, thus reducing safety hazards.

[0037] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] Figure 1 This is a structural schematic diagram of the manually locking quick-connect connector provided in this application. Figure 2 This is a structural schematic diagram of the counterpart provided in this application. Figure 3 This is a top view of the manually locking quick-connect connector provided in this application. Figure 4 for Figure 3 AA section view in the middle, Figure 5 This is a structural diagram of the connector body in the manual locking quick-connect connector provided in this application. Figure 6 This is a schematic diagram of the locking mechanism in the manual locking quick-connect connector provided in this application. Figure 7 This is a structural schematic diagram of the latch in the manually locking quick-connect connector provided in this application from another perspective. Figure 8 This is a schematic diagram showing the connection between the locking tongue and the locking block provided in this application. Figure 9 A schematic diagram of the safety ring provided in this application.

[0039] Please refer to Figures 1-9 This application provides a manually locking quick-connect connector, including a connector body 1 and a latch 2. The connector body 1 has a connecting channel 11 for connecting a counterpart 7. The side wall of the connector body 1 has two opposing first openings 12, which are connected to the connecting channel 11. The connector body 1 is provided with a locking block 14 opposite to the position of the first opening 12. The latch 2 includes a U-shaped latch body 21, which is an elastic element. The inner side of the latch body 21 is provided with a spreading part 211, which is at least partially located in the connecting channel 11. The spreading part 211 has an inclined surface on the side facing the counterpart 7. The open end of the latch body 21 is provided with two opposing locking tongues 212. The latch 2 has an initial state and a locked state. In the initial state, the latch 2 is separated from the connector body 1. In the locked state, the latch body 21 is inserted into the first opening 12, and the locking tongues 212 are engaged with the locking block 14.

[0040] The manual locking quick-connect connector provided in this application has an opening portion 211 on the inner side of the locking body 21. The opening portion 211 is at least partially located within the connecting channel 11, and the side facing the opponent 7 is set with an inclined surface. The opening end of the locking body 21 is provided with a locking tongue 212, and the connector body 1 is provided with a locking block 14 that cooperates with the locking tongue 212. In the initial state, the locking 2 is separated from the connector body 1. When it is necessary to connect the opponent 7 to the connector body 1, the locking body 21 is first inserted into the first opening 12 of the connector body 1, and then the opponent 7 is inserted into the connecting channel 11 of the connector body 1. Since the opening portion 211 is set with an inclined surface facing the opponent 7, and the locking 2 is an elastic element, the opening portion 211 drives the U-shaped locking body 21 to open to both sides under the pressure of the opponent 7, thereby increasing the distance between the two locking tongues 212. If the insertion depth of the locking component 7 is insufficient, the opening width of the two locking tongues 212 will be insufficient. When the operator manually presses the latch 2, the end of the locking tongue 212 will be blocked by the locking block 14. The operator will not be able to properly engage the locking tongue 212 with the locking block 14 even if they continue to press the latch 2. When the locking component 7 is inserted into the connecting channel 11, the two locking tongues 212 will reach the required opening width. When the operator manually presses the latch 2, the two locking tongues 212 can pass over the locking block 14 and engage with the locking block 14, achieving a locked state and preventing the latch 2 from loosening with the connector body, thus achieving a reliable connection between the locking component 7 and the connector body 1. With this solution, staff can visually determine whether the latch 2 and the connector body 1 are correctly engaged by checking whether the latch 2 can be pressed. If the latch 2 can be pressed, it means that the latch 2 and the connector body 1 are correctly engaged. If it cannot be pressed, it means that the latch 2 and the connector body 1 are not correctly engaged. This avoids misjudging the connection status, which may lead to an unstable connection or no connection, and reduces safety hazards.

[0041] In some embodiments of this application, please refer to Figure 6 , Figure 7 and Figure 8 A first guide surface 2121 is provided on the side of the locking tongue 212 away from the opening part 211. The first guide surface 2121 is located on the opposite side of the two locking tongues 212. The first guide surface 2121 can guide the two locking tongues 212, so as to facilitate the locking tongues 212 and the locking block 14 to engage.

[0042] In some embodiments of this application, please refer to Figure 2 , Figure 3 , Figure 6 and Figure 7The latch body 21 is connected to two opposing limiting plates 22. The connector body 1 has two opposing second openings 13. The limiting plates 22 are slidably connected to the second openings 13. The hand piece 7 is provided with a first annular boss 71. When the latch 2 is in the locked state, the limiting plate 22 and the first annular boss 71 abut against the end of the latch body 21 away from the latch body 21.

[0043] When the locking body 21 is inserted into the first opening 12, the limiting plate 22 is simultaneously inserted into the second opening 13. The second opening 13 guides the limiting plate 22 and increases its rigidity. After the matching piece 7 is inserted into the connecting channel 11, the operator presses the locking buckle 2, causing the limiting plate 22 to move along the direction of the second opening 13 and abut against the first annular protrusion 71 on the matching piece 7, thereby achieving a reliable connection between the matching piece 7 and the connector body 1.

[0044] In some embodiments of this application, see 5 and Figure 6 The limiting plate 22 is provided with buckles 222 on both sides, and the buckles 222 are slidably connected to the second opening 13.

[0045] Specifically, the two sides of the limiting plate 22 protrude outward to form two buckles 222. The two buckles 222 are engaged in the second opening 13 and can slide in the second opening 13. The two buckles 222 are provided with guide slopes on the side facing the locking tongue 212 to facilitate insertion into the second opening 13.

[0046] In some embodiments of this application, an avoidance groove is provided between the two limiting plates 22, which serves to avoid the structure on the connector body 1 on the one hand, and to reduce the rigidity of the limiting plate 22 in the plane on the other hand, so as to facilitate the two buckles 222 being snapped into the second opening 13.

[0047] In some embodiments of this application, see Figure 2 A second annular boss 72 is provided on the outer side of the hand member 7. The outer diameter of the second annular boss 72 is greater than the distance between it and the two supporting parts 211, and smaller than the outer diameter of the first annular boss 71.

[0048] When the handpiece 7 is inserted into the connector body 1, the second annular boss 72 first contacts the opening part 211. Under the action of the inclined surface of the opening part 211, the locking body 21 opens. When the second annular boss 72 moves to the bottom of the opening part 211, the locking body 21 opens into place. At this time, the operator can press the locking buckle 2 to make the locking tongue 212 engage with the locking block 14.

[0049] In some embodiments of this application, see Figure 6 and Figure 7The limiting plate 22 is provided with a first limiting part 221 that protrudes towards the latch body 21. The first limiting part 221 is arc-shaped and matches the size of the first annular boss 71. The first limiting part 221 abuts against the end of the first annular boss 71 that is away from the latch body 21.

[0050] The first limiting part 221 protrudes on the limiting plate 22, increasing its thickness and thus improving its rigidity in the thickness direction, ensuring the stability of the connection between the connector and the joint body 1. The first limiting part 221 is set to an arc shape that matches the size of the first annular boss 71 of the opposing part 7, which can increase the contact area between the first limiting part 221 and the end face of the first annular boss 71, further improving the connection stability.

[0051] In some embodiments of this application, see Figure 6 and Figure 7 The thickness of the first limiting part 221 gradually decreases at the end near the first annular boss 71 to form the second guide surface 2211.

[0052] The first limiting part 221 can be guided by the second guide surface 2211. When the latch 2 is manually pressed, the limiting plate 22 moves along the direction of the second opening 13. The first limiting part 221 first contacts the first annular boss 71 through the second guide surface 2211. Then the first limiting part 221 continues to move and squeezes the first annular boss 71 under the action of the second guide surface 2211, so that the connection between the hand piece 7 and the connector body 1 is tighter and the sealing performance is further improved.

[0053] In some embodiments of this application, please refer to Figure 7 The latch body 21 is provided with a second limiting part 213. The second limiting part 213 is located at the end of the latch body 21 away from the latch tongue 212, and in the locked state, the second limiting part 213 abuts against the side of the first annular boss 71.

[0054] In the locked state, the second limiting part 213 abuts against the side of the first annular boss 71, thereby limiting the radial movement of the first annular boss 71 and preventing the hand piece 7 from moving radially along the connector body 1. By limiting the hand piece 7 axially with the first limiting part 221 and limiting the hand piece 7 radially with the second limiting part 213, the stability of the connection between the hand piece 7 and the connector body 1 is further improved.

[0055] In some embodiments of this application, please refer to Figure 3 and Figure 4 The inner wall of the connector body 1 is provided with a safety ring 3, a first sealing ring 4, an isolation ring 5, and a second sealing ring 6. The first opening 12, the safety ring 3, the first sealing ring 4, the isolation ring 5, and the second sealing ring 6 are arranged sequentially along the insertion direction of the connector 7.

[0056] The first sealing ring 4 and the second sealing ring 6 form a sealing surface with the surface of the opposing component 7 when the component 7 is inserted, thus achieving an internal sealing function. The isolation ring 5 separates the first sealing ring 4 and the second sealing ring 6, ensuring that the two sealing rings have sufficient deformation space during sealing. The safety ring 3 is fixed to the connector body 1 and is used to limit the relative displacement of the first sealing ring 4, the isolation ring 5, and the second sealing ring 6.

[0057] In related technologies, since the safety ring 3 and the connector body 1 are fitted with an interference fit, when the safety ring 3 is pressed down and assembled onto the connector body 1, the assembly needs to be achieved by the deformation of the safety ring 3, which carries the risk of damaging the safety ring 3 or the connector body 1.

[0058] To address the aforementioned issues, some embodiments of this application refer to... Figure 9 The safety ring 3 has multiple deformation grooves 31 along its circumference, and the deformation grooves 31 are located on the inner side of the safety ring 3.

[0059] By opening multiple deformation grooves 31 along the circumferential direction on the inner side of the safety ring 3, the safety ring 3 can have sufficient deformation space in the radial direction, and the deformation strength is less than that of the material itself, thereby reducing the risk of damaging the safety ring 3 or the joint body 1 during assembly.

[0060] In some embodiments of this application, see Figure 4 and Figure 9 The inner wall of the connector body 1 is provided with a limiting boss 16 and a limiting groove 15. The outer side of the safety ring 3 is provided with an annular protrusion 32, which matches the limiting groove 15. The first sealing ring 4, the isolation ring 5, and the second sealing ring 6 are located between the limiting boss 16 and the safety ring 3.

[0061] During assembly, the second sealing ring 6, the isolation ring 5, the first sealing ring 4, and the safety ring 3 are first sequentially assembled into the connector body 1. The limiting boss 16 inside the connector body 1 limits the second sealing ring 6. The safety ring 3 is engaged with the limiting groove 15 inside the connector body 1 via its annular protrusion 32 on its outer side, thus completing the assembly of the safety ring 3. The first sealing ring 4, the isolation ring 5, and the second sealing ring 6 are located between the limiting boss 16 and the safety ring 3. Because both ends are limited, they will not shift, thereby improving the sealing effect.

[0062] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0063] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0064] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and alterations may be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A manual locking quick- release connector, characterized in that, The utility model relates to a connector, which comprises: a connector body having a connecting channel for connecting a counterpart, a side wall of the connector body being provided with two oppositely arranged first openings in communication with the connecting channel, and a locking block arranged on the connector body opposite to the first openings; a lock catch comprising a U-shaped lock catch body, the lock catch body being a resilient member, an inner side of the lock catch body being provided with a spreading part, the spreading part being at least partially located in the connecting channel, and a side of the spreading part facing the counterpart being provided with an inclined surface, and two oppositely arranged lock latches being arranged at an open end of the lock catch body; the lock catch has an initial state and a locking state, in the initial state, the lock catch is separated from the connector body, and in the locking state, the lock catch body is inserted into the first opening, and the lock latches are clamped with the locking block.

2. The manual lock-together quick- coupling according to claim 1, characterized in that A first guide surface is arranged on a side of the lock latches away from the spreading part.

3. The manual lock-together quick- coupling according to claim 1, characterized in that The lock catch body is connected with two oppositely arranged limiting plates, the connector body is provided with two oppositely arranged second openings, the limiting plates are slidably connected with the second openings, and a first annular boss is arranged on the counterpart, when the lock catch is in the locking state, the limiting plates abut against one end of the first annular boss away from the lock catch body.

4. The manual lock-together quick- coupling according to claim 3, characterized in that The limiting plates are provided with buckles slidably connected with the second openings. And / or, an outer side of the counterpart is provided with a second annular boss, an outer diameter of the second annular boss is greater than a distance between the two spreading parts, and smaller than an outer diameter of the first annular boss.

5. The manual lock-together quick- coupling according to claim 3, characterized in that The limiting plates are provided with first limiting parts protruding towards the lock catch body, the first limiting parts are arc-shaped and match the size of the first annular boss, and the first limiting parts abut against one end of the first annular boss away from the lock catch body.

6. The manual lock-together quick- coupling according to claim 5, characterized in that The first limiting parts gradually decrease in thickness near one end of the first annular boss to form a second guide surface.

7. The manual lock-together quick- coupling according to claim 5, characterized in that The lock catch body is provided with a second limiting part at one end of the lock catch body away from the lock latches, and in the locking state, the second limiting part abuts against a side surface of the first annular boss.

8. The manual locking quick plug according to claims 1-7, characterized in that An inner wall of the connector body is provided with a safety ring, a first sealing ring, a separation ring and a second sealing ring, the first openings, the safety ring, the first sealing ring, the separation ring and the second sealing ring are sequentially arranged along an insertion direction of the counterpart.

9. The manual lock-together quick- coupling according to claim 8, characterized in that The safety ring is provided with a plurality of deformation grooves along a circumferential direction, and the deformation grooves are located on an inner side of the safety ring.

10. The manual lock-together quick- coupling according to claim 9, characterized in that An inner wall of the connector body is provided with a limiting boss and a limiting groove, an outer side of the safety ring is provided with an annular protrusion matching the limiting groove, and the first sealing ring, the separation ring and the second sealing ring are located between the limiting boss and the safety ring.

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