CPA connector with bidirectional pre-fixing function
By designing a CPA connector with a bidirectional anti-lock hook and a thrust surface, the problems of pre-positioning defects and linkage failures were solved, achieving locking reliability and preventing accidental contact, thus improving the safety and stability of the connector.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGYI TECHNOLOGY (MIANYANG) CO LTD
- Filing Date
- 2025-09-02
- Publication Date
- 2026-07-21
AI Technical Summary
Existing CPA connectors have issues such as pre-positioning defects, linkage failures, and insufficient protection against accidental contact. These issues can cause the connectors to loosen under vibration or external impact, leading to safety hazards such as signal interruption and power short circuits.
Design a CPA connector with bidirectional pre-fixation. The pre-positioning and fixing of the CPA locking element is achieved by the bidirectional anti-reverse hook and anti-thrust surface cooperation between the plug housing and the socket housing. A C-shaped buckle and stepped surface structure are added to prevent misoperation and accidental unlocking.
It improves locking reliability and operational safety, prevents connectors from accidentally falling off, eliminates safety hazards caused by misoperation, and ensures that the locking is in place and that the linkage self-unlocks.
Smart Images
Figure CN224537535U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of connector technology, specifically, to a CPA connector with bidirectional pre-fixation. Background Technology
[0002] With the development of new energy connector technology, waterproof connectors in fields such as automotive electronics and industrial equipment require highly reliable locking structures to prevent accidental detachment due to vibration. Connector Position Assurance (CPA) mechanisms are widely used as key locking components, enhancing connection stability through secondary locking after the connector plug and socket are mated.
[0003] In existing technologies, traditional CPA structures often suffer from pre-positioning defects, linkage failures, and insufficient protection against accidental activation. This not only reduces production efficiency and increases costs, but more importantly, if not fully locked, vehicle vibrations or external impacts can cause the connection to loosen, leading to signal transmission interruptions, power short circuits, and other malfunctions. Furthermore, without an anti-accidental activation design in the locked state, accidental pressing of the cantilever can cause the plug and socket to lose their locking mechanism. If the unlocking force is too low, vehicle vibrations may cause the CPA to accidentally slide backward and unlock, resulting in serious safety accidents such as power outages, vehicle interruptions, or even fires. Utility Model Content
[0004] To address the aforementioned technical problems, the purpose of this utility model is to provide a CPA connector with bidirectional pre-fixed features, as well as linkage self-unlocking and anti-accidental touch functions, to improve locking reliability and operational safety.
[0005] The present invention solves the above problems through the following technical solution:
[0006] A CPA connector with bidirectional pre-fixation includes: a plug housing and a receptacle housing that are mated together; a CPA locking member is installed in the plug housing; wherein, the upper side of the plug housing is provided with a housing anti-reverse hook and a housing angle thrust surface; the cantilever of the CPA locking member forms an anti-reverse hook upward and an angle thrust surface downward; the upper side of the receptacle housing is provided with a receptacle protrusion; when the cantilever of the CPA locking member passes through the through hole of the housing anti-reverse hook and reaches the CPA pre-positioning position, the anti-reverse hook is engaged. On the right side of the housing anti-reverse hook, the locking hook is used to prevent the locking member from retracting. The locking member's included angle thrust surface is located on the left side of the housing's included angle thrust surface to limit the movement of the locking member's included angle thrust surface to the right. When the plug housing and the socket housing are inserted into each other, the socket outer protrusion of the socket housing engages with the left side of the housing's included angle thrust surface and pushes against the locking member's included angle thrust surface of the CPA locking member cantilever, causing the pre-positioned housing included angle thrust surface and the locking member's included angle thrust surface to separate. Under the action of force, the CPA locking member continues to advance into the plug housing and achieves secondary locking.
[0007] As a further improvement, the upper left side of the plug housing is provided with a housing anti-reverse hook, which extends to the right side from the front and rear sides and surrounds to form the housing included angle thrust surface.
[0008] As a further improvement, the left end face of the housing anti-reverse hook is formed with a second thrust surface of the plug cantilever, and the inner end face of the CPA lock is formed with a second thrust surface of CPA that cooperates with the second thrust surface of the plug cantilever; and when the CPA lock is pushed forward to the end point, the included angle thrust surface of the lock is located on the right side of the included angle thrust surface of the housing, and the outer protrusion of the socket is located on the left side of the included angle thrust surface of the housing, so as to achieve secondary locking.
[0009] As a further improvement, the CPA connector has an anti-accidental contact function.
[0010] As a further improvement, the CPA lock is provided with a C-shaped buckle, and the cantilever of the CPA lock is set in the C-shaped buckle and connected at the left end; the cantilever inside the upper side of the plug housing has a stepped surface; the C-shaped buckle of the CPA lock engages with the stepped surface of the cantilever of the plug housing, and only by pressing down on the CPA lock can the left cantilever of the plug housing move down to unlock the plug and socket; when the CPA lock is pushed forward to the end point, the protruding ribs on both sides of the CPA lock engage with the grooves on both sides of the plug housing, and the CPA lock cannot be pressed down, thus forming the anti-accidental contact function.
[0011] As a further improvement, the CPA lock arm is provided with a smooth upward lock protrusion and a downward lock bevel hook. The lock protrusion is located between the lock anti-reverse hook and the lock bevel hook. When the CPA lock is pulled back to unlock, the lock bevel hook lifts up, forcing the CPA lock arm to lift up. The friction between the lock protrusion and the third stop surface of the plug housing increases the difficulty of unlocking, thus preventing accidental activation.
[0012] As a further improvement, the C-shaped buckle covers the locking mechanism's anti-reverse hook, and both the locking mechanism protrusion and the locking mechanism's beveled hook are located inside the plug housing.
[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0014] (1) This utility model aims to solve the problem of bidirectional fixation of CPA pre-positioning in the existing connector locking technology to prevent accidental detachment; optimize the locking linkage mechanism to reduce the pushing resistance of CPA locking parts and ensure that the locking is in place; and eliminate the safety hazards caused by misoperation and accidental unlocking.
[0015] (2) This application achieves bidirectional positioning and fixation of the CPA lock by cooperating with the bidirectional anti-reverse hook and anti-thrust surface of the plug housing and the CPA lock; optimizes the locking linkage mechanism by automatically lifting the CPA cantilever to release the pre-lock using the socket protrusion; adds a stepped surface and C-shaped buckle interlocking structure to prevent pressing after locking; and designs a beveled hook and stop surface to prevent misoperation, accidental unlocking, etc. It is a CPA connector with bidirectional pre-fixation, linkage self-unlocking and anti-accidental touch functions to improve locking reliability and operational safety. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of the plug housing of this utility model;
[0017] Figure 2 This is a structural schematic diagram of the CPA lock component of this utility model;
[0018] Figure 3 This is a schematic diagram showing the pre-positioning position of the CPA in the plug housing and CPA locking element of this utility model;
[0019] Figure 4 This is a schematic diagram of the structure of the socket housing of this utility model;
[0020] Figure 5 This is a schematic diagram of the plug housing of the secondary locking structure of this utility model;
[0021] Figure 6 This is a schematic diagram of the CPA locking component of the secondary locking structure of this utility model;
[0022] Figure 7 This is a schematic diagram showing the position of the second thrust surface of the CPA in this utility model;
[0023] Figure 8 This is a schematic diagram showing the position of the hook on the inclined surface of the locking component in the secondary locking structure of this utility model;
[0024] Figure 9 This is a schematic diagram of the C-shaped buckle and the stepped surface of this utility model.
[0025] Figure 10 This is a schematic diagram showing the fit between the protruding ribs on both sides of the CPA and the grooves on both sides of the plug housing of this utility model.
[0026] Figure label:
[0027] 101. Plug housing; 102. Housing anti-reverse hook; 103. Housing included angle thrust surface; 104. Third stop surface; 201. CPA locking element; 202. Locking element anti-reverse hook; 203. Locking element included angle thrust surface; 204. Locking element protrusion; 205. Locking element beveled hook; 501. Socket housing; 502. Socket outer protrusion; 601. Plug cantilever second thrust surface; 602. CPA second thrust surface; 901. C-shaped buckle; 902. Stepped surface; 1001. Plug housing side grooves; 1002. CPA side ribs. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] Example:
[0030] Combined with appendix Figure 1-10 As shown, a CPA connector with bidirectional pre-fixed features includes: a plug housing 101 and a socket housing 501 that are mated together, and a CPA locking element 201 is installed inside the plug housing 101.
[0031] The plug housing 101 has a housing anti-reverse hook 102 on its upper left side. The housing anti-reverse hook 102 extends to the right from the front and rear sides and encloses to form a housing angle thrust surface 103. The CPA locking member 201 has a locking member anti-reverse hook 202 on its upper cantilever and a locking member angle thrust surface 203 on its lower right end. When the cantilever of the CPA locking member 201 passes through the through hole of the housing anti-reverse hook 102 and reaches the CPA pre-positioning position, the locking member anti-reverse hook 202 is located to the right of the housing anti-reverse hook 102, so as to stop the locking member anti-reverse hook 202 through the housing anti-reverse hook 102. The locking member angle thrust surface 203 is located inside the housing angle thrust surface 103 to limit the movement of the locking member angle thrust surface 203 to the right. The CPA pre-positioning is achieved through the above bidirectional fixing structure, forming a bidirectional mechanical limit.
[0032] Furthermore, the linkage self-unlocking propulsion: The left end of the upper side of the socket housing 501 is provided with a socket outer protrusion 502. When the plug housing 101 and the socket housing 501 are inserted into each other, the socket outer protrusion 502 of the socket housing 501 is inserted into the housing angle thrust surface 103 and pushes against the locking angle thrust surface 203 of the CPA locking arm, so that the pre-positioned housing angle thrust surface 103 and the locking angle thrust surface 203 are separated, so that the CPA locking 201 can continue to advance in the plug housing 101 under a certain force.
[0033] Optionally, the CPA connector has a secondary locking and anti-accidental contact function: the left end face of the housing anti-reverse hook 102 forms a plug cantilever second thrust surface 601, and the inner end face of the CPA locking member 201 forms a CPA second thrust surface 602.
[0034] Locking reinforcement structure: When the CPA locking member is pushed forward to the end point, the second thrust surface 601 of the plug cantilever and the second thrust surface 602 of the CPA interlock; the cantilever of the CPA locking member presses against the cantilever of the plug housing, that is, the locking member angle thrust surface 203 is located outside the housing angle thrust surface 103, and the socket protrusion 502 is located inside the housing angle thrust surface 103, thereby improving the fastening force of the plug and socket.
[0035] Anti-accidental touch function: The CPA lock has a C-shaped latch 901, and the cantilever of the CPA lock is set inside the C-shaped latch 901, with the left end of the cantilever of the CPA lock connected to the left end face inside the C-shaped latch 901; the cantilever inside the upper side of the plug housing 101 forms a stepped surface 902; the C-shaped latch of the CPA lock engages with the stepped surface of the cantilever of the plug housing, and only by pressing down on the CPA lock can the left cantilever of the plug housing move downward, thereby unlocking the plug and socket; when the CPA lock is pushed forward to the end point, the protruding ribs 1002 on both sides of the CPA engage with the grooves 1001 on both sides of the plug housing, and the CPA lock cannot be pressed down, thus forming the anti-accidental touch function. This avoids accidental pressing of the cantilever of the plug housing or the CPA lock, which could cause the plug and socket to fail to lock, thus physically blocking the pressing path.
[0036] Preferably, the CPA connector also features an anti-accidental unlocking function. Force-controlled unlocking design: The CPA locking arm is equipped with a smooth locking protrusion 204 and a locking bevel hook 205. The locking protrusion 204 is positioned upwards, and the locking bevel hook 205 is positioned downwards, with the locking protrusion 204 positioned between the locking anti-reverse hook 202 and the locking bevel hook 205. When pulling back to unlock, the locking bevel hook 205 presses against the plug arm, forcing the CPA locking arm to rise. The locking protrusion 204 rubs against the third stop surface 104 of the plug housing, requiring a certain force to forcibly unlock.
[0037] Furthermore, the C-shaped buckle 901 covers the locking mechanism anti-reverse hook 202, and both the locking mechanism protrusion 204 and the locking mechanism bevel hook 205 are located inside the plug housing to prevent accidental activation.
[0038] This application aims to address the existing connector locking technology by achieving bidirectional fixation of CPA pre-positioning to prevent accidental detachment; optimizing the locking linkage mechanism to reduce the pushing resistance of the CPA locking component and ensure proper locking; and eliminating safety hazards caused by misoperation and accidental unlocking.
[0039] This application achieves bidirectional positioning and fixation of the CPA lock by cooperating with the plug housing and the CPA lock's bidirectional anti-reverse hook and anti-thrust surface; optimizes the locking linkage mechanism by automatically raising the CPA cantilever to release the pre-lock using the socket protrusion; adds a stepped surface and C-shaped buckle interlocking structure to prevent pressing after locking, and designs a beveled hook and stop surface to prevent misoperation and accidental unlocking.
[0040] Although the present invention has been described herein with reference to illustrative embodiments, the above embodiments are merely preferred embodiments of the present invention, and the implementation of the present invention is not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.
Claims
1. A CPA connector with bidirectional pre-fixation, characterized in that, include: The plug housing and socket housing are designed for interlocking, and the CPA locking element is installed inside the plug housing. The upper side of the plug housing is provided with a housing anti-reverse hook and a housing angle anti-thrust surface. The cantilever of the CPA locking element has an anti-reverse hook forming upward and an angle anti-thrust surface forming downward. The upper side of the socket housing is provided with a socket protrusion. When the cantilever of the CPA lock penetrates the through hole of the housing anti-reverse hook and reaches the CPA prepositioning position, the lock anti-reverse hook is located on the right side of the housing anti-reverse hook to prevent the lock anti-reverse hook from retracting, and the lock included angle thrust surface is located on the left side of the housing included angle thrust surface to limit the movement of the lock included angle thrust surface to the right end. When the plug housing and the socket housing are inserted into each other, the socket protrusion of the socket housing engages with the left side of the housing angle thrust surface and pushes against the locking angle thrust surface of the CPA locking arm, causing the pre-positioned housing angle thrust surface and locking angle thrust surface to separate. Under the action of force, the CPA locking component continues to advance into the plug housing and achieves secondary locking.
2. The CPA connector with bidirectional pre-fixation according to claim 1, characterized in that, The plug housing has a housing anti-reverse hook on the upper left side, and the housing anti-reverse hook extends to the right side from the front and rear sides and surrounds to form the housing included angle thrust surface.
3. The CPA connector with bidirectional pre-fixation according to claim 1, characterized in that, The left end face of the housing anti-reverse hook forms a second thrust surface of the plug cantilever, and the inner end face of the CPA lock forms a second thrust surface of CPA that mates with the second thrust surface of the plug cantilever; and when the CPA lock is pushed forward to the end point, the included angle thrust surface of the lock is located to the right of the included angle thrust surface of the housing, and the outer protrusion of the socket is located to the left of the included angle thrust surface of the housing, so as to achieve secondary locking.
4. A CPA connector with bidirectional pre-fixation according to any one of claims 1-3, characterized in that, The CPA connector has an anti-accidental contact function.
5. A CPA connector with bidirectional pre-fixation according to claim 4, characterized in that, The CPA lock is equipped with a C-shaped buckle, and the cantilever of the CPA lock is located inside the C-shaped buckle and connected at the left end. The cantilever inside the upper side of the plug housing has a stepped surface. The C-shaped buckle of the CPA lock engages with the stepped surface of the cantilever of the plug housing. Only by pressing down on the CPA lock can the left cantilever of the plug housing move down to unlock the plug from the socket. When the CPA lock is pushed forward to the end point, the protruding ribs on both sides of the CPA engage with the grooves on both sides of the plug housing, and the CPA lock cannot be pressed down, thus forming the anti-accidental contact function.
6. A CPA connector with bidirectional pre-fixation according to claim 5, characterized in that, The CPA lock arm is provided with a smooth, upward-facing lock protrusion and a downward-facing lock bevel hook. The lock protrusion is positioned between the lock anti-reverse hook and the lock bevel hook. When the CPA lock is pulled back to unlock, the lock bevel hook lifts up, forcing the CPA lock arm to lift up. The friction between the lock protrusion and the third stop surface of the plug housing increases the difficulty of unlocking, thus preventing accidental activation.
7. A CPA connector with bidirectional pre-fixation according to claim 6, characterized in that, The C-shaped buckle covers the locking mechanism's anti-reverse hook, and both the locking mechanism protrusion and the locking mechanism's beveled hook are located inside the plug housing.