An automatic connection device

Abstract

The application belongs to the technical field of pipeline connection, and particularly relates to an automatic connection device, which comprises a female end connector and a male end plug. The female end connector comprises a female end shell, a female end valve core, a female end valve core return spring and a locking mechanism. The male end plug comprises a male end shell and a male end valve core. The locking mechanism comprises a locking snap spring, a locking sleeve, a locking sleeve return spring and a locking snap spring support ring. The locking sleeve is sleeved outside the female end shell, the locking sleeve return spring is arranged between the locking sleeve and the female end shell, and the locking snap spring support ring is fixed on the female end shell. After the male end plug is inserted into the female end connector to a position, the locking sleeve moves to a locking position under the action of the locking sleeve return spring, the locking snap spring is limited in the locking position, and the locking sleeve is in a locking state of being unable to move axially after the male end plug is inserted into the position, so that the locking snap spring is prevented from being misinterpreted.

Description

Technical Field

[0001] This invention relates to the field of pipeline connection technology, and in particular to an automatic connection device. Background Technology

[0002] Currently, quick-connect devices widely used in liquid cooling pipeline connections consist of a male plug and a female connector. After the male and female ends are plugged in, axial fixation is achieved through a locking spring.

[0003] However, in actual use, after the male and female terminals are plugged in, there is a risk that the locking mechanism may automatically unlock due to misoperation, external vibration, or pulse pressure. If the locking mechanism unlocks unexpectedly, the pipeline will be accidentally disconnected, resulting in the heating components not being effectively cooled down, leading to functional degradation, damage, or even spontaneous combustion.

[0004] Therefore, a connection device is needed to prevent the locking mechanism from being mis-locked under the above-mentioned operating conditions, so as to improve the reliability and safety of the liquid cooling pipeline connection. Summary of the Invention

[0005] To address the aforementioned shortcomings in the existing technology, the present invention provides an automatic connection device to solve the problems of easy mis-locking of the locking mechanism of the existing quick connection device, inability to automatically seal in both directions after disconnection, and inability of the operating components to automatically reset after unlocking.

[0006] To address the aforementioned technical problems, this invention provides an automatic connection device, comprising a female connector and a male plug. The female connector includes a female housing, a female valve core, a female valve core return spring, and a locking mechanism; the male plug includes a male housing and a male valve core. The locking mechanism includes a locking snap ring, a locking sleeve, a locking sleeve return spring, and a locking snap ring support ring. The locking sleeve is fitted onto the outside of the female housing, the locking sleeve return spring is disposed between the locking sleeve and the female housing, and the locking snap ring support ring is fixed to the female housing. After the male plug is inserted into the female connector, the locking sleeve moves to the locking position under the action of the locking sleeve return spring, restricting the locking snap ring to the locking position. The locking sleeve is in a locked state that cannot move axially after the male plug is inserted, thereby preventing the locking snap ring from being mis-locked.

[0007] Furthermore, a circumferential positioning structure is provided between the locking sleeve and the female end housing, allowing the locking sleeve to rotate around the axis of the female end housing between the locked and unlocked positions. When the locking sleeve rotates to the unlocked position, it can move axially along the female end housing, causing the locking spring to open outwards, thus allowing the male plug to be pulled out. This circumferential positioning structure ensures that the unlocking operation must involve two consecutive actions: "rotating first, then pressing." External force in one direction cannot trigger unlocking, effectively preventing accidental operation.

[0008] Furthermore, the female end housing is provided with a female end locking sleeve anti-reverse spring, which is used to prevent the locking sleeve from dislodging from the upper end of the female end housing under the action of the return spring, ensuring that the locking sleeve always remains in the assembly position on the housing.

[0009] Furthermore, the locking spring support ring has a ring structure with an annular groove on its outer circumference to accommodate the locking spring, and its inner circumference is interference-fitted or snap-fitted with the female end housing. This support ring distributes the supporting reaction force of the locking spring to a larger area of ​​the female end housing, preventing the locking spring from being directly embedded in the plastic housing and causing wear.

[0010] Furthermore, the inner side of the female end housing is provided with two female end inner sealing rings, which are arranged at intervals along the axial direction, and a female end isolation ring is provided in the middle to form a double sealing redundancy.

[0011] Furthermore, the female and male end shells are each equipped with a color-coded identification ring to prevent incorrect insertion of pipes of different specifications.

[0012] Furthermore, the female end housing is equipped with a female end valve column. When connected, the male end valve core abuts against the valve column, causing the valve cores on both sides to separate from their respective sealing rings, forming a connected fluid passage. When disconnected, the valve cores on both sides automatically reset and seal under the action of their respective return springs.

[0013] The beneficial effects of this invention are: (1) By setting a rotatable locking sleeve in cooperation with the locking sleeve return spring, after the male plug is inserted into the position, the locking sleeve automatically returns to the locking position and restricts the radial displacement of the locking spring. At the same time, the locking sleeve itself is restricted by the circumferential positioning structure and cannot move axially, forming a double locking structure. It must be rotated and then pressed to unlock, which effectively prevents accidental unlocking caused by misoperation, vibration and pulse pressure. (2) By setting a locking circlip support ring, the concentrated load of the locking circlip is distributed to a larger area of ​​the housing, avoiding wear of the plastic housing by the circlip embedding, and improving the durability and reliability of the locking mechanism. (3) The sealing structure with double inner sealing rings and isolation rings is adopted. Even if one sealing ring fails, the other can still maintain the seal, which improves the sealing reliability. Attached Figure Description

[0014] Figure 1 An exploded view of an embodiment of the automatic connection device of the present invention. Figure 1 ; Figure 2 An exploded view of an embodiment of the automatic connection device of the present invention. Figure 2 ; Figure 3 This is a cross-sectional structural schematic diagram of an embodiment of the automatic connection device of the present invention; The reference numerals in the accompanying drawings include: 1-Female QC upper housing, 2-Female QC lower housing, 3-Female sleeve, 4-Female valve core, 5-Female color identification ring, 6-Female inner sealing ring, 7-Female isolation ring, 8-Female valve core sealing ring, 9-Female valve core return spring, 10-Female locking sleeve, 11-Female locking snap ring, 12-Female valve column, 13-Female locking sleeve return spring, 14-Female locking snap ring support ring, 15-Female locking sleeve anti-reverse snap ring, 16-Male QC housing, 17-Male anti-reverse ring, 18-Male valve core, 19-Male valve core sealing ring, 20-Male return spring, 21-Male color identification ring, 22-Male outer sealing ring. Detailed Implementation

[0015] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments: It should be noted that the same or similar reference numerals in the accompanying drawings of the embodiments of the present invention correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0016] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0017] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0018] Example like Figures 1-3 As shown, the end connector includes the following components: female end QC upper housing 1, female end QC lower housing 2, female end sleeve 3, female end valve core 4, female end color identification ring 5, female end inner sealing ring 6, female end isolation ring 7, female end valve core sealing ring 8, female end valve core return spring 9, female end locking sleeve 10, female end locking snap ring 11, female end valve column 12, female end locking sleeve return spring 13, female end locking snap ring support ring 14, and female end locking sleeve anti-reverse snap ring 15.

[0019] The upper housing 1 and lower housing 2 of the female end QC are connected by snap-fit ​​or ultrasonic welding to form the outer shell of the female end connector. A central support column is located at the center of the lower housing 2 of the female end QC, which supports the female end valve core 12. The female end sleeve 3 is located inside the female end housing and outside the female end valve core 4, guiding the movement of the female end valve core 4.

[0020] The female valve core 4 is slidably disposed within the female valve housing, and a female valve core sealing ring 8 is provided between the female valve core 4 and the female valve housing. The female valve core return spring 9 is sleeved on the outside of the female valve column 12, with one end abutting against the female valve core 4 and the other end abutting against the central support column of the female valve housing. It is used to push the female valve core 4 and the female valve core sealing ring 8 to fit tightly together in the open state, so as to achieve sealing and flow blocking on the female side.

[0021] The female valve stem 12 is located in the center hole of the female housing. One end of the female valve stem 12 abuts against the female valve core 4, and the other end faces the insertion direction of the male plug. When the male plug is inserted into place, the male valve core 18 pushes the female valve stem 12, and the female valve stem 12 then pushes the female valve core 4, causing the female valve core 4 to disengage from the female valve core sealing ring 8, thus opening the fluid passage.

[0022] The female end color-marking ring 5 is a thin-walled annular component that fits onto the outer circumference of the insertion end of the female end housing. The female end color-marking ring 5 is injection-molded from a plastic material of a different color than the female end housing and is fixed to the female end housing via a snap-fit ​​structure or interference fit. The outer circumference of the female end color-marking ring 5 may have anti-slip textures or marking grooves to facilitate operator identification of pipeline specifications. The color of the female end color-marking ring 5 corresponds one-to-one with the color of the male end color-marking ring 21, used to distinguish pipelines of different diameters, media, or pressure ratings, preventing mis-insertion of male plugs of different specifications with female connectors. The female end color-marking ring 5 does not participate in sealing or locking functions; it only serves an marking purpose.

[0023] Two O-rings, each an O-ring, are installed in two annular sealing grooves on the inner circumferential surface of the female end housing. These two O-rings are spaced apart axially along the female end housing to seal the annular gap between the outer circumferential surface of the male end housing 16 and the inner circumferential surface of the female end housing after the male plug is inserted, preventing fluid leakage from the mating surfaces. A female end isolation ring 7, an annular spacer with an axial length equal to the distance between the two sealing grooves, separates the two O-rings and prevents them from squeezing each other under fluid pressure, thus preventing seal failure. The O-rings are made of coolant-resistant rubber material with a circular cross-section and a compression ratio controlled between 15% and 25%. This double-seal structure ensures that even if one O-ring wears or ages, the other O-ring remains sealed, improving sealing reliability.

[0024] The female locking sleeve 10 is a generally cylindrical component, fitted onto the outer circumferential surface of the female end housing, and can rotate around the axis of the female end housing and slide axially. The inner circumferential surface of the female locking sleeve 10 has a straight wall section and a pushing slope, which cooperate with the female end locking spring 11. The outer circumferential surface of the female locking sleeve 10 has anti-slip knurling or raised ribs to facilitate rotation and pressing by the operator. The lower end face of the female locking sleeve 10 (the end facing the insertion direction of the male end) abuts against the female locking sleeve return spring 13. The side wall of the female locking sleeve 10 has an axially extending guide groove, and the female end housing has a corresponding guide protrusion. The guide protrusion is embedded in the guide groove, preventing the female locking sleeve 10 from moving axially in the locked position. Only after rotating to the unlocked position, when the guide groove aligns with the guide protrusion, can it move axially. The lower part of the inner circumferential surface of the female locking sleeve 10 is provided with a pushing slope for pushing the female locking spring 11 outward. When the female locking sleeve 10 is in the upper position (locked position) under the action of the female locking sleeve return spring 13, the straight wall part of its inner circumferential surface presses against the female locking spring 11, restricting the female locking spring 11 from opening outward; when the female locking sleeve 10 is rotated to the unlocked position and pressed down, its pushing slope contacts the female locking spring 11, pushing the female locking spring 11 outward and releasing the locking of the male plug.

[0025] The female locking sleeve return spring 13 is a helical compression spring, sleeved on the outer circumferential surface of the female end housing, located between the female locking sleeve 10 and the spring positioning step on the female end housing. The lower end (the end facing the male insertion direction) of the female locking sleeve return spring 13 abuts against the spring positioning surface of the female end housing, and the upper end (the end away from the male insertion direction) abuts against the lower end face of the female locking sleeve 10. The spring wire diameter, mean diameter, and effective number of turns of the female locking sleeve return spring 13 are determined according to the required return force, so that the female locking sleeve 10 always remains in the upper position (locked position) when no external force is applied. During the insertion of the male plug, the guide slope at the front end of the male plug housing 16 pushes open the female plug locking spring 11. After the male plug is fully inserted, the female plug locking spring 11 rebounds inward under its own elastic force and locks into the groove of the male plug anti-reverse ring 17. At the same time, the female plug locking sleeve 10 automatically moves upward to the locking position under the restoring force of the female plug locking sleeve return spring 13, and its inner circumferential surface presses against the female plug locking spring 11, completing the automatic locking. During the unlocking operation, the operator first rotates the female plug locking sleeve 10 to the unlock position, and then presses the female plug locking sleeve 10 downward. At this time, the female plug locking sleeve return spring 13 is compressed and stores elastic potential energy. When the male plug is pulled out, the female plug locking sleeve 10 is released, the female plug locking sleeve return spring 13 releases its elastic potential energy, and pushes the female plug locking sleeve 10 to automatically return to the upper position.

[0026] The female-end locking spring support ring 14 is an annular metal component or a high-strength plastic component, fixedly sleeved on the outer circumferential surface of the female-end housing, located inside the female-end locking spring 11. The outer circumferential surface of the female-end locking spring support ring 14 has an annular groove, within which the female-end locking spring 11 is accommodated. The width of the annular groove matches the wire diameter of the female-end locking spring 11, providing axial positioning and radial support for the female-end locking spring 11. The inner circumferential surface of the female-end locking spring support ring 14 is interference-fitted with the outer circumferential surface of the female-end housing or fixedly connected by a snap-fit ​​structure, ensuring that the female-end locking spring support ring 14 does not shift when subjected to the insertion force and locking force of the male plug. The bottom of the annular groove of the female-end locking spring support ring 14 has a radial through hole or notch, providing outward deformation space for the female-end locking spring 11 when the female-end locking sleeve 10 is pressed down. The female end locking spring support ring 14 disperses the supporting reaction force of the female end locking spring 11 to a larger area of ​​the female end housing, avoiding the female end locking spring 11 from being directly embedded in the female end housing (plastic part) and causing wear or plastic deformation, thus improving the durability and reliability of the locking mechanism.

[0027] The male connector includes the following components: male QC housing 16, male anti-reverse ring 17, male valve core 18, male valve core sealing ring 19, male return spring 20, male color identification ring 21, and male outer sealing ring 22.

[0028] The male QC housing 16 is a tubular component with a guide bevel at its front end (insertion end) to push open the female locking spring 11 when the female connector is inserted. The outer circumferential surface of the male QC housing 16 has an annular groove in which a male anti-reverse ring 17 is engaged. The male anti-reverse ring 17 is a C-shaped elastic retaining ring or annular flange with a beveled front end and an annular positioning surface perpendicular to the axis at its rear end. When the male connector is fully inserted, the female locking spring 11 engages with the positioning surface on the rear side of the male anti-reverse ring 17, achieving axial locking.

[0029] The male valve core 18 is slidably disposed within the male QC housing 16, and a male valve core sealing ring 19 is provided between the male valve core 18 and the male QC housing 16. The male return spring 20 is disposed between the male valve core 18 and the spring seat inside the male QC housing 16, and is used to push the male valve core 18 and the male valve core sealing ring 19 to fit tightly together in the disconnected state, so as to achieve sealing and flow control on the male end side.

[0030] The male end outer sealing ring 22 is an O-ring rubber sealing ring, which is set in the sealing groove on the outer peripheral surface of the male end QC housing 16. It is used to seal the mating gap between the male end QC housing 16 and the inner peripheral surface of the female end housing after the male end plug is inserted into the female end connector. The male end color identification ring 21 is sleeved on the outer peripheral surface of the tail of the male end QC housing 16, and its color corresponds to the female end color identification ring 5.

[0031] The assembly process of the female end connector is as follows: Insert the female end valve core sealing ring 8 into the female end valve core 4; insert the female end valve core return spring 9 into the female end valve column 12; install the female end valve column 12 together with the female end valve core 4 into the center hole of the female end QC lower housing 2; press the female end sleeve 3 into the female end QC lower housing 2; install the two female end inner sealing rings 6 and the female end isolation ring 7 into the sealing groove on the inner circumferential surface of the female end QC lower housing 2; press the female end locking spring support ring 14 onto the outer circumferential surface of the female end QC lower housing 2; and then... The locking circlip 11 is installed into the annular groove of the female end locking circlip support ring 14; the female end locking sleeve return spring 13 and the female end locking sleeve 10 are sequentially fitted into the female end QC lower housing 2; the female end locking sleeve anti-reverse circlip 15 is inserted into the circlip groove on the outer circumference of the female end QC lower housing 2 to restrict the female end locking sleeve 10 from coming out; the female end color identification ring 5 is fitted onto the insertion end of the female end QC lower housing 2; finally, the female end QC upper housing 1 and the female end QC lower housing 2 are fastened together to form the female end sub-assembly.

[0032] The assembly process of the male connector is as follows: fit the male valve core sealing ring 19 into the male valve core 18, and install the male return spring 20 and the male valve core 18 into the male QC housing 16; install the male outer sealing ring 22 into the sealing groove on the outer circumference of the male QC housing 16; snap the male anti-reverse ring 17 into the slot on the outer circumference of the male QC housing 16; and fit the male color identification ring 21 onto the tail of the male QC housing 16 to form the male sub-assembly.

[0033] Except for spring-type parts (female valve core return spring 9, female locking snap ring 11, female locking sleeve return spring 13, female locking sleeve anti-reverse snap ring 15, male return spring 20, male anti-reverse ring 17) which are formed by winding, all other parts except for the sealing ring (rubber material) are injection molded.

[0034] Locking process (connection state): Align the male plug with the insertion hole of the female connector and push it in axially. The guide slope at the front end of the male QC housing 16 contacts the female locking spring 11, elastically pushing the female locking spring 11 outward. As the male plug continues to be inserted, the male outer sealing ring 22 and the female inner sealing ring 6 sequentially enter the mating surface to form a seal. When the male plug is fully inserted, the end face of the male valve core 18 abuts against the female valve column 12. The female valve column 12 pushes the female valve core 4, while the male valve core 18 is abutted and limited by the female valve column 12. As the male QC housing 16 continues to move forward, the male valve core 18 moves backward relative to the male QC housing 16, causing the female valve core 4 to disengage from the female valve core sealing ring 8 and the male valve core 18 to disengage from the male valve core sealing ring 19, thus opening the fluid passage. Simultaneously, the female locking spring 11 rebounds inward under its own elastic force, engaging with the rear side of the positioning surface of the male anti-return ring 17; the female locking sleeve 10 automatically moves upward to the locked position under the restoring force of the female locking sleeve return spring 13, its inner circumferential surface pressing against the female locking spring 11, restricting the female locking spring 11 from opening outward. At this time, the female locking sleeve 10 is restricted by the circumferential positioning structure and cannot move axially, forming a double lock. In this state, even if subjected to misoperation, external vibration, or pulse pressure, the female locking spring 11 cannot open outward, and the male plug will not accidentally come out.

[0035] Unlocking process (disconnected state): First, rotate the female locking sleeve 10 around the axis to the unlocked position, aligning the guide groove with the guide protrusion; then, press the female locking sleeve 10 downwards along the axial direction, compressing the female locking sleeve return spring 13. The pushing slope at the lower end of the female locking sleeve 10 pushes the female locking spring 11 outwards, disengaging the female locking spring 11 from the male anti-reverse ring 17; while maintaining the pressing state, pull out the male plug. After the male plug is pulled out, the female valve core 4 resets under the action of the female valve core return spring 9, sealing against the female valve core sealing ring 8; the male valve core 18 resets under the action of the male valve core return spring 20, sealing against the male valve core sealing ring 19, achieving bidirectional rapid sealing and shut-off. Release the female locking sleeve 10, which returns to the upper position under the action of the female locking sleeve return spring 13.

[0036] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. An automatic connection device, comprising a female connector and a male plug, wherein the female connector includes a female housing, a female valve core, a female valve core return spring, and a locking mechanism, and the male plug includes a male housing and a male valve core; characterized in that, The locking mechanism includes a locking snap ring, a locking sleeve, a locking sleeve return spring, and a locking snap ring support ring. The locking sleeve is sleeved on the outside of the female end housing, the locking sleeve return spring is disposed between the locking sleeve and the female end housing, and the locking snap ring support ring is fixed to the female end housing. After the male plug is inserted into the female connector, the locking sleeve moves to the locking position under the action of the locking sleeve return spring, restricting the locking snap ring to the locking position. The locking sleeve is in a locked state that cannot move axially after the male plug is inserted into the position.

2. The automatic connection device according to claim 1, characterized in that, A circumferential positioning structure is provided between the locking sleeve and the female end housing. The locking sleeve can rotate around the axis of the female end housing between the locked position and the unlocked position. When the locking sleeve rotates to the unlocked position, the locking sleeve can move along the axial direction of the female end housing to drive the locking spring to open outward.

3. The automatic connection device according to claim 2, characterized in that, The female end housing is provided with a female end locking sleeve anti-reverse spring, which is used to prevent the locking sleeve from dislodging from the female end housing.

4. The automatic connection device according to claim 1, characterized in that, The locking spring support ring has an annular structure. The outer circumferential surface of the locking spring support ring is provided with an annular groove for accommodating the locking spring. The inner circumferential surface of the locking spring support ring is interference-fitted or snap-fitted with the outer circumferential surface of the female end housing.

5. The automatic connection device according to claim 1, characterized in that, The inner side of the female end housing is provided with a female end inner sealing ring. There are two female end inner sealing rings, which are arranged at intervals along the axial direction of the female end housing. A female end isolation ring is provided between the two female end inner sealing rings.

6. The automatic connection device according to claim 1, characterized in that, The female end housing is provided with a female end color identification ring at its end, and the male end housing is provided with a male end color identification ring at its end. The colors of the female end color identification ring and the male end color identification ring are set to correspond.

7. The automatic connection device according to claim 1, characterized in that, The female end housing is provided with a female end valve column, one end of which abuts against the female end valve core, and the female end valve core return spring is sleeved on the outside of the female end valve column; when the male end plug is connected to the female end connector, the male end valve core in the male end housing abuts against the other end of the female end valve column, so that the female end valve core and the male end valve core are respectively disengaged from their respective mating sealing rings, forming a fluid passage.

8. The automatic connection device according to claim 1, characterized in that, The female end housing includes a female end QC upper housing and a female end QC lower housing. The female end QC upper housing and the female end QC lower housing are snap-fitted or welded together. The female end housing also has a female end sleeve located outside the female end valve core.

9. The automatic connection device according to claim 1, characterized in that, The male end housing is provided with a male end anti-reverse ring, which is used to cooperate with the locking snap ring to achieve axial locking; the outer circumferential surface of the male end housing is provided with a male end outer sealing ring, which is used to seal the mating surface between the male end housing and the female end housing.

10. The automatic connection device according to claim 1, characterized in that, The number of locking springs is two, and the two locking springs are symmetrically arranged on both sides of the female end housing; the locking springs are C-shaped elastic springs or U-shaped elastic springs, and the insertion end of the male end housing is provided with a guide slope, which is used to cooperate with the locking springs when the male end plug is inserted, so that the locking springs elastically open outward.

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