Electric connector assembly and position assurance device thereof

Abstract

The utility model relates to an electric connector assembly and a position guaranteeing device thereof. The position guaranteeing device comprises a lock catch elastic arm which extends along the plugging direction of the electric connector, wherein the front end of the lock catch elastic arm in the plugging direction is provided with a first lock catch which protrudes downwards; the pressing part is connected to the rear end of the lock catch elastic arm in the inserting direction; the first supporting arm and the second supporting arm extend downwards from the two sides of the rear end in the inserting direction of the lock catch elastic arm respectively; the third connecting arm and the fourth connecting arm extend backwards from the lower ends of the first supporting arm and the second supporting arm respectively and exceed the pressing part; and the stop block is connected to the rear ends of the third connecting arm and the fourth connecting arm. According to the electric connector assembly, three-section unlocking of the unlocking outer clamping handle, the unlocking signal terminal and the unlocking power terminal can be completed through one position guaranteeing device, operation is simplified, and the connection reliability and safety of the electric connector assembly are improved.

Description

Technical Field

[0001] The present application relates to an electrical connector, and more particularly, to an electrical connector assembly and a position ensuring device thereof. Background Art

[0002] Electrical connectors are indispensable components for connecting wiring harnesses with other electrical equipment. Electrical connectors are used in almost all locations on new energy vehicles. Vehicles will experience bumps while driving on the road. In order to prevent the electrical connectors from failing due to bumps and vibrations during vehicle use, the CPA (Connector Position Assurance) mechanism is an important secondary locking structure. It is used to ensure that a set of plug-in electrical connectors will not be easily removed after being locked, ensuring connection stability and reliability.

[0003] Due to the high-voltage characteristics of the connections in the field of new energy vehicles, tip discharge will occur at the moment of contact separation, generating an arc. To address this safety hazard, the high-voltage connector needs to have two sets of circuit systems, one is the power circuit, and the other is the signal circuit. The signal circuit controls the power circuit. Only when the signal circuit is connected, the power circuit will pass current. Therefore, the CPA mechanism is widely used in the high-voltage connectors of new energy vehicles, so that the unlocking of the high-voltage connector requires two stages, namely the first stage of disconnecting the low-voltage electrical signal terminal and the second stage of disconnecting the high-voltage power terminal. However, existing high-voltage connectors usually require two CPA parts to achieve segmented unlocking of the signal terminal and the power terminal, which increases the complexity of the operation and is prone to misoperation, affecting the stability and reliability of the connection. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide an electrical connector assembly and a position assurance device thereof which can realize segmented unlocking with only one CPA part in view of the above-mentioned defects of the prior art.

[0005] In order to solve its technical problems, the present application proposes a position ensuring device for use with an electrical connector in the first aspect, the position ensuring device comprising: a lock spring arm extending along the plug-in direction of the electrical connector, the front end of the lock spring arm in the plug-in direction being provided with a first lock protruding downward; a pressing portion connected to the rear end of the lock spring arm in the plug-in direction; a first support arm and a second support arm extending downward from both sides of the rear end of the lock spring arm in the plug-in direction, respectively; a third connecting arm and a fourth connecting arm extending backward from the lower ends of the first support arm and the second support arm, respectively, and exceeding the pressing portion; and a stopper connected to the rear ends of the third connecting arm and the fourth connecting arm.

[0006] According to an embodiment of the position assurance device described in the first aspect of the present application, a second lock buckle protruding downward is further provided at the lower portion of the lock buckle elastic arm behind the first lock buckle.

[0007] According to an embodiment of the position ensuring device described in the first aspect of the present application, the rear end of the stopper also protrudes upwardly from a pushing portion.

[0008] According to an embodiment of the position ensuring device described in the first aspect of the present application, the position ensuring device is further provided with a limiting structure that enables the position ensuring device to be slidably arranged on the electrical connector along the plugging direction and has a locking position and an unlocking position relative to the electrical connector.

[0009] According to an embodiment of the position assurance device described in the first aspect of the present application, the limiting structure includes a first clamping point and a second clamping point respectively arranged on the relatively outer sides of the third connecting arm and the fourth connecting arm and distributed front and back along the plug-in direction.

[0010] According to an embodiment of the position ensuring device described in the first aspect of the present application, the limiting structure also includes a guide sliding block protruding from the bottom of the stopper and extending along the plug-in direction.

[0011] In order to solve the technical problem, the present application proposes an electrical connector assembly in the second aspect, including a first electrical connector and a second electrical connector for mating and plugging, the first electrical connector having a first power terminal and a first signal terminal, the second electrical connector having a second power terminal and a second signal terminal, the first electrical connector being provided with an external clamping handle which is locked with a positioning protrusion provided with the second electrical connector, the first power terminal is in contact with the second power terminal, and the first signal terminal is in contact with the second signal terminal; the external clamping handle has a clamping portion located at the front end and a handle portion located at the rear end along the plugging direction, and a support portion is provided at the bottom between the front end and the rear end and fixedly connected with the outer surface of the first electrical connector, the electrical connector assembly also includes a position ensuring device which is slidably provided on the external clamping handle of the first electrical connector along the plugging direction and has a locking position and an unlocking position relative to the external clamping handle, the position ensuring device includes: a locking spring arm extending along the plugging direction of the first electrical connector, the front end of the locking spring arm in the plugging direction is provided with a first locking spring which protrudes downward; a pressing portion connected to the rear end of the locking spring arm in the plugging direction; and first supporting arms extending downward from both sides of the rear end of the locking spring arm in the plugging direction and a second arm; a third connecting arm and a fourth connecting arm respectively extending backward from the lower ends of the first arm and the second arm and exceeding the pressing portion; and a stopper connected to the rear ends of the third connecting arm and the fourth connecting arm; wherein the lock spring arm and the pressing portion are located above the outer card handle, and the first arm, the third connecting arm, the second arm and the fourth connecting arm are respectively located on both sides of the outer card handle; when the position ensuring device is in the locked position, the stopper abuts against the bottom of the handle portion of the outer card handle to prevent the handle portion from being pressed, and the first lock is located in front of the buckle portion of the outer card handle; the position ensuring device extends backward from the locked position When sliding to the unlocking position, the stop block moves backward from the bottom of the handle of the outer latch handle to unlock the outer latch handle, and the handle of the outer latch handle is pressed to cause the buckle portion to lift up and disengage from the engagement with the positioning protrusion of the second electrical connector. When the first electrical connector is moved backward together with the position ensuring device until the first lock is engaged with the positioning protrusion, the first signal terminal is disconnected from the second signal terminal while the first power terminal remains in contact with the second power terminal. Then, when the pressing portion of the position ensuring device is pressed to lift the first lock and disengage from the engagement with the positioning protrusion, the first electrical connector can continue to move backward and be completely unlocked from the second electrical connector.

[0012] According to an embodiment of the electrical connector assembly described in the second aspect of the present application, the lower part of the locking spring arm of the position ensuring device is also provided with a second locking catch protruding downward behind the first locking catch; when the position ensuring device is in the locked position, the second locking catch is placed on the front side of the locking portion of the outer clamping handle to prevent the locking portion from being disengaged from the locking connection with the positioning protrusion of the second electrical connector; when the position ensuring device slides backward from the locked position to the unlocked position, the second locking catch is placed on the rear side of the locking portion of the outer clamping handle so that the position ensuring device can move backward with the first electrical connector.

[0013] According to an embodiment of the electrical connector assembly described in the second aspect of the present application, the position ensuring device is further provided with a first clamping point and a second clamping point distributed front and back along the plug-in direction on the relatively outer sides of the third connecting arm and the fourth connecting arm respectively; the outer surface of the first electrical connector is provided with a first limiting wall and a second limiting wall on both sides of the outer clamping handle respectively, and the first limiting wall and the second limiting wall are correspondingly provided with a first clamping groove and a second clamping groove distributed front and back along the plug-in direction, the first clamping groove is adapted to the first clamping point, and the length of the second clamping groove along the plug-in direction corresponds to the distance the position ensuring device moves from the locked position to the unlocked position; when the position ensuring device is in the locked position, the first clamping point is clamped in the first clamping groove, and the second clamping point is clamped in the front end of the second clamping groove; when the position ensuring device slides backward from the locked position to the unlocked position, the second clamping point is clamped in the rear end of the second clamping groove, and the first clamping point is clamped in the front end of the second clamping groove.

[0014] According to an embodiment of the electrical connector assembly described in the second aspect of the present application, the position ensuring device also has a guide slider protruding from the bottom of the block and extending along the plug-in direction; the outer surface of the first electrical connector correspondingly forms a guide groove extending along the plug-in direction that cooperates with the guide slider.

[0015] The implementation of the electrical connector assembly and its position ensuring device of the present application has the following beneficial effects: the position ensuring device according to the embodiment of the present application is slidably arranged on the outer clamping handle of the first electrical connector along the plug-in direction and has a locking position and an unlocking position relative to the outer clamping handle; when the position ensuring device is in the locking position, the stopper of the position ensuring device abuts against the handle portion of the outer clamping handle to prevent the handle portion from being pressed, thereby ensuring that the buckle portion of the outer clamping handle will not be disengaged from the clamping connection with the positioning protrusion of the second electrical connector; when the position ensuring device slides backward from the locking position to the unlocking position, the outer clamping handle is blocked from being pressed. The stopper of the handle of the card handle is moved out to unlock the outer card handle. Pressing the handle of the outer card handle can lift the buckle part up to disengage from the engagement with the positioning protrusion of the second electrical connector and move the first electrical connector backwards together with the position assurance device. When the first lock buckle of the position assurance device is engaged with the positioning protrusion, the first electrical connector and the second electrical connector are unlocked to disconnect the signal terminal and keep the power terminal in contact. Then, pressing the pressing part of the position assurance device can lift the first lock buckle up to disengage from the engagement with the positioning protrusion and move the first electrical connector backwards to completely unlock the second electrical connector. Therefore, according to the embodiment of the present application, the electrical connector assembly can complete the three-stage unlocking of unlocking the outer card handle, unlocking the signal terminal and unlocking the power terminal through a position assurance device, thereby simplifying the operation and improving the connection reliability and safety of the electrical connector assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 is a schematic diagram of the assembly structure of an electrical connector assembly according to an embodiment of the present application;

[0018] Figure 2 yes Figure 1 The exploded structural diagram of the electrical connector assembly shown;

[0019] Figure 3 yes Figure 2 A schematic structural diagram of another angle of the first electrical connector shown in FIG.

[0020] Figure 4 yes Figure 2 A schematic structural diagram of another angle of the position holding device shown in FIG.

[0021] Figure 5 yes Figure 1 A structural cross-sectional view of the electrical connector assembly shown when the position retaining device is in a locked position;

[0022] Figure 6 yes Figure 1 The structural cross-sectional view of the electrical connector assembly shown is a structural cross-sectional view of the unlocked outer latch handle when the position retaining device slides backward from the locked position to the unlocked position;

[0023] Figure 7 yes Figure 6 A structural cross-sectional view of the electrical connector assembly when the position retaining device is in the unlocked position, pressing the handle of the outer latch handle downward to unlock the first electrical connector and the second electrical connector so that the signal terminals are disconnected;

[0024] Figure 8 yes Figure 7 The illustrated structural cross-sectional view of the electrical connector assembly is a diagram showing a state in which the pressing portion of the position retaining device is continuously pressed to completely unlock the first electrical connector and the second electrical connector when the position retaining device is in the unlocking position. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In addition, the embodiments in the present application and the features in the embodiments may be combined with each other in the absence of conflict.

[0026] Figure 1 and Figure 2 The assembled structure and exploded structure of the electrical connector assembly 100 according to one embodiment of the present application are shown respectively. Figure 1 and Figure 2 As shown, the electrical connector assembly 100 includes a first electrical connector 10, a second electrical connector 20 and a position ensuring device 30. The first electrical connector 10 is provided with a first power terminal and a first signal terminal (not visible in the figure), and the second electrical connector 20 is provided with a second power terminal and a second signal terminal (not visible in the figure). When the first electrical connector 10 and the second electrical connector 20 are mated and plugged in place, the first signal terminal contacts the second signal terminal to achieve electrical connection, and the first power terminal contacts the second power terminal to achieve electrical connection. The position ensuring device 30 is used to lock the mated first electrical connector 10 and the second electrical connector 20 for a second time to ensure the connection stability and reliability of the electrical connector assembly 100.

[0027] See Figure 2 Combination Figure 3 As shown, the outer surface of the first electrical connector 10 is provided with an outer clamping handle 11, and the outer clamping handle 11 has a buckle portion 112 at the front end and a handle portion 111 at the rear end in the plugging direction of the first electrical connector 10 to the second electrical connector 20, and a first support rod 113 and a second support rod 114 are provided on both sides of the bottom between the front end and the rear end as support portions and fixedly connected to the outer surface of the first electrical connector 10. It should be noted that the expression "plugging direction" that appears later in this article refers to the plugging direction of the first electrical connector 10 to the second electrical connector 20.

[0028] See also Figure 3 As shown, the buckle portion 112 of the external clamping handle 11 includes a first connecting arm 1121 and a second connecting arm 1122 extending forward from both sides of the front end of the handle 111, and a buckle connecting rod 1123 connecting the front ends of the first connecting arm 1121 and the second connecting arm 1122, and the rear end surface of the buckle connecting rod 1123 forms a clamping surface 1124. The first support rod 113 and the second support rod 114 extend obliquely downward from the rear end bottom of the first connecting arm 1121 and the second connecting arm 1122 of the buckle portion 112, and the lower ends of the first support rod 113 and the second support rod 114 are fixedly connected to the outer surface of the first electrical connector 10. In this way, the handle 111 and the buckle portion 112 of the external clamping handle 11 can have a certain elastic deformation space with the first support rod 113 and the second support rod 114 as fulcrums.

[0029] For example Figure 2As shown, the corresponding outer surface of the second electrical connector 20 is provided with a positioning protrusion 21 in the plugging direction, and the front end surface of the positioning protrusion 21 in the plugging direction forms a positioning surface 211, and the rear end forms a guiding inclined surface 212. In the process of plugging the first electrical connector 10 into the second electrical connector 20, the snap-in connecting rod 1123 of the snap-in portion 112 of the outer snap handle 11 is elastically deformed and gradually lifted up along the guiding inclined surface 212 of the positioning protrusion 21, and when the snap-in surface 1124 of the snap-in connecting rod 1123 is plugged into the positioning surface 211 of the positioning protrusion 21, the snap-in portion 112 is elastically reset so that the snap-in surface 1124 of the snap-in connecting rod 1123 is snapped with the positioning surface 211 of the positioning protrusion 21. At this time, the first electrical connector 10 and the second electrical connector 20 are plugged into place, locked by the cooperation of the external clamping handle 11 and the positioning protrusion 21, and the plugged first electrical connector 10 and the second electrical connector 20 can be locked again by placing the position ensuring device 30 in the locking position.

[0030] See also Figure 4 As shown, the position assurance device 30 is provided with a lock spring arm 31 extending in the plugging direction, the rear end of the lock spring arm 31 in the plugging direction is connected with a pressing portion 32, the rear end of the lock spring arm 31 in the plugging direction extends downwardly with a first arm 331 and a second arm 332 respectively on both sides, and a third connecting arm 341 and a fourth connecting arm 342 extending backward beyond the pressing portion 32 respectively from the lower ends of the first arm 331 and the second arm 332, the stopper 35 is connected to the rear ends of the third connecting arm 341 and the fourth connecting arm 342, and the rear end of the stopper 35 also protrudes upwardly from a pushing portion 351. The front end of the lock spring arm 31 in the plugging direction is provided with a first lock 36 protruding downwardly, the rear end surface of the first lock 36 forms a lock surface 361, and the lower part of the lock spring arm 31 is also provided with a second lock 37 protruding downwardly behind the first lock 36.

[0031] The position ensuring device 30 is slidably disposed on the outer handle 11 of the first electrical connector 10 along the plugging direction, the locking spring arm 31 and the pressing portion 32 are located above the outer handle 11, and the first arm 331, the third connecting arm 341, the second arm 332, and the fourth connecting arm 342 are respectively located on both sides of the outer handle 11. The position ensuring device 30 is locked relative to the outer handle 11 by means of a limiting structure matched with the first electrical connector 10 (see Figure 1 and Figure 5 ) and unlocked position (see Figure 6 ). Figure 2 and Figure 4As shown, the position ensuring device 30 is provided with a first clamping point 381 and a second clamping point 382 distributed frontward and rearward along the plugging direction on the relative outer sides of the third connecting arm 341 and the fourth connecting arm 342. Correspondingly, the outer surface of the first electrical connector 10 is provided with a first limiting wall 121 and a second limiting wall 122 on both sides of the outer clamping handle 11, and a first clamping groove 131 and a second clamping groove 132 are correspondingly provided on the first limiting wall 121 and the second limiting wall 122 distributed frontward and rearward along the plugging direction, wherein the first clamping groove 131 is adapted to the first clamping point 381 of the position ensuring device 30, and the second clamping groove 132 extends along the plugging direction, and its length corresponds to the distance that the position ensuring device 30 moves from the locked position to the unlocked position, so as to position the position ensuring device 30 when it moves and switches between the locked position and the unlocked position. Specifically, when the position ensuring device 30 is in the locked position, the first clamping point 381 is clamped in the first clamping slot 131, and the second clamping point 382 is clamped at the front end of the second clamping slot 132; when the position ensuring device 30 slides backward from the locked position to the unlocked position, the second clamping point 382 slides along the second clamping slot 132 and is clamped at the rear end of the second clamping slot 132, and the first clamping point 381 is released from the first clamping slot 131 and then clamped at the front end of the second clamping slot 132. Figure 2 and Figure 4 As shown, the position ensuring device 30 also has a guide slider 352 protruding from the bottom of the stop block 35 and extending in the plug-in direction. The outer surface of the first electrical connector 10 correspondingly forms a guide slot 14 extending in the plug-in direction and cooperating with the guide slider 352. When the position ensuring device 30 moves and switches between the locked position and the unlocked position, the guide slider 352 cooperates with the guide slot 14 to provide further guiding effect.

[0032] See also Figure 1 Combination Figure 5 As shown, when the first electrical connector 10 and the second electrical connector 20 are plugged into place and locked by the cooperation between the outer clamping handle 11 and the positioning protrusion 21, when the position ensuring device 30 is pushed to the locking position, the stopper 35 of the position ensuring device 30 abuts against the lower part of the handle 111 of the outer clamping handle 11 to prevent the handle 111 from being pressed, thereby preventing the buckle connecting rod 1123 of the outer clamping handle 11 from being separated from the clamping connection with the positioning protrusion 21 of the second electrical connector 20. At the same time, the first locking buckle 36 of the position ensuring device 30 is located in front of the buckle connecting rod 1123 of the outer clamping handle 11, and the second locking buckle 37 is just placed in front of the buckle connecting rod 1123 of the outer clamping handle 11 to prevent the buckle connecting rod 1123 of the outer clamping handle 11 from being separated from the clamping connection with the positioning protrusion 21 of the second electrical connector 20, further locking the plugged first electrical connector 10 and the second electrical connector 20 for the second time, ensuring that the first electrical connector 10 and the second electrical connector 20 are stably and reliably connected.

[0033] See also Figure 5 Combination Figure 6 As shown, by pushing the push portion 351 (as shown in FIG. Figure 5 As shown by the arrow in the middle), the position holding device 30 can be moved from Figure 5 Slide the locking position shown back to Figure 6 When the position ensuring device 30 is in the unlocked position, see Figure 6 As shown in FIG. 1 , the stopper 35 of the position ensuring device 30 moves backward from the handle portion 111 of the outer card handle 11, and the second lock buckle 37 of the position ensuring device 30 is placed on the rear side of the buckle connecting rod 1123 of the outer card handle 11, and the outer card handle 11 is unlocked. At this time, the handle portion 111 of the outer card handle 11 is pressed downward (as shown in FIG. 1 ). Figure 6 The first electrical connector 10 is moved backward relative to the second electrical connector 20, and the second locking buckle 37 is acted on by the buckle link 1123 to move the position assurance device 30 backward together. Figure 7 As shown, when the first electrical connector 10 is moved back with the position assurance device 30 until the first lock 36 of the position retention device 30 engages with the positioning protrusion 21 of the second electrical connector 20 through the lock surface 361, the first electrical connector 10 and the second electrical connector 20 are unlocked in two stages so that the first signal terminal 15 and the second signal terminal 22 are disconnected, while the first power terminal and the second power terminal (not visible in the figure) are still in contact. Then refer to Figure 7 Combination Figure 8 As shown, the pressing portion 32 of the position ensuring device 30 is pressed downward (as shown in FIG. Figure 7 As shown by the arrow in the middle, the first locking buckle 36 of the position assurance device 30 can be lifted up to disengage from the locking engagement with the positioning protrusion 21 of the second electrical connector 20, and then the first electrical connector 10 is further moved backward relative to the second electrical connector 20, and the first electrical connector 10 and the second electrical connector 20 are unlocked in three stages so that the first power terminal is disconnected from the second power terminal, that is, the first electrical connector 10 and the second electrical connector 20 are completely unlocked, see Figure 8 shown.

[0034] According to the electrical connector assembly 100 of the above embodiment of the present application, after the first electrical connector 10 and the second electrical connector 20 are plugged in place, the position retaining device 30 is pushed forward to the locking position to complete the secondary locking. When unlocking, the first step is to push the position retaining device 30 backward to the unlocking position, the second step is to press the handle 111 of the outer card handle 11 downward to unlock the first electrical connector 10 and the second electrical connector 20 in two stages to disconnect the contact of the signal terminal, and the third step is to press the pressing part 32 of the position retaining device 30 downward to unlock the first electrical connector 10 and the second electrical connector 20 in three stages to disconnect the contact of the power terminal, thereby completing the complete unlocking. According to the electrical connector assembly 100 of the above embodiment of the present application, the three-stage unlocking can be completed by a position ensuring device 30, which simplifies the operation and improves the connection reliability and safety of the electrical connector assembly 100.

[0035] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A position assurance device used in conjunction with an electrical connector, characterized in that: The position ensuring device comprises: A lock spring arm extending along the plugging direction of the electrical connector, wherein a first lock protruding downward is provided at the front end of the lock spring arm in the plugging direction; A pressing portion connected to the rear end of the locking spring arm in the plugging direction; A first support arm and a second support arm respectively extending downward from both sides of the rear end of the locking spring arm in the insertion direction; A third connecting arm and a fourth connecting arm respectively extending backward from the lower ends of the first supporting arm and the second supporting arm and exceeding the pressing portion; and A stopper connected to the rear ends of the third connecting arm and the fourth connecting arm.

2. The position ensuring device according to claim 1, characterized in that: The lower part of the lock buckle elastic arm is also provided with a second lock buckle protruding downwards behind the first lock buckle.

3. The position ensuring device according to claim 1, characterized in that: The rear end of the stopper also protrudes upwards to form a pushing portion.

4. The position ensuring device according to claim 1, characterized in that: The position ensuring device is also provided with a limiting structure which enables the position ensuring device to be slidably arranged on the electrical connector along the plugging direction and has a locking position and an unlocking position relative to the electrical connector.

5. The position ensuring device according to claim 4, characterized in that: The limiting structure comprises a first clamping point and a second clamping point respectively arranged on the relatively outer sides of the third connecting arm and the fourth connecting arm and distributed frontward and rearward along the plugging direction.

6. The position ensuring device according to claim 5, characterized in that: The limiting structure also includes a guide sliding block protruding from the bottom of the stopper and extending along the plugging direction.

7. An electrical connector assembly, comprising a first electrical connector and a second electrical connector that are matingly plugged in, the first electrical connector having a first power terminal and a first signal terminal, the second electrical connector having a second power terminal and a second signal terminal, the first electrical connector being provided with an external latch handle that, when locked with a positioning protrusion provided with the second electrical connector, the first power terminal contacts the second power terminal, and the first signal terminal contacts the second signal terminal; the external latch handle having a latch portion at the front end and a handle portion at the rear end along the plugging direction, and a support portion being provided at the bottom between the front end and the rear end and fixedly connected to the outer surface of the first electrical connector, characterized in that: The electrical connector assembly further comprises a position ensuring device which is slidably arranged on the outer clamping handle of the first electrical connector along the plugging direction and has a locking position and an unlocking position relative to the outer clamping handle, the position ensuring device comprising: A lock spring arm extending along the plugging direction of the first electrical connector, wherein the front end of the lock spring arm in the plugging direction is provided with a first lock protruding downward; A pressing portion connected to the rear end of the locking spring arm in the plugging direction; A first support arm and a second support arm respectively extending downward from both sides of the rear end of the locking spring arm in the insertion direction; A third connecting arm and a fourth connecting arm respectively extending backward from the lower ends of the first supporting arm and the second supporting arm and exceeding the pressing portion; and A stopper connected to the rear ends of the third connecting arm and the fourth connecting arm; Wherein, the lock spring arm and the pressing portion are located above the outer clamping handle, and the first support arm, the third connecting arm, the second support arm and the fourth connecting arm are respectively located on both sides of the outer clamping handle; When the position ensuring device is in the locked position, the stopper abuts against the lower part of the handle of the outer handle to prevent the handle from being pressed, and the first lock buckle is located in front of the buckle part of the outer handle; When the position ensuring device slides backward from the locked position to the unlocked position, the stop block moves backward from the handle portion of the outer clamping handle to unlock the outer clamping handle, and the handle portion of the outer clamping handle is pressed to cause the buckle portion to lift up and disengage from the engagement with the positioning protrusion of the second electrical connector. When the first electrical connector is moved backward with the position ensuring device until the first lock is engaged with the positioning protrusion, the first signal terminal is disconnected from the second signal terminal while the first power terminal remains in contact with the second power terminal. Then, when the pressing portion of the position ensuring device is pressed to cause the first lock to lift up and disengage from the engagement with the positioning protrusion, the first electrical connector can continue to move backward and be completely unlocked from the second electrical connector.

8. The electrical connector assembly according to claim 7, characterized in that: The lower part of the lock spring arm of the position ensuring device is also provided with a second lock protruding downward behind the first lock; when the position ensuring device is in the locked position, the second lock is placed on the front side of the lock portion of the outer handle to prevent the lock portion from being disengaged from the locking connection with the positioning protrusion of the second electrical connector; when the position ensuring device slides backward from the locked position to the unlocked position, the second lock is placed on the rear side of the lock portion of the outer handle so that the position ensuring device can move backward with the first electrical connector.

9. The electrical connector assembly according to claim 7, characterized in that: The position ensuring device is further provided with a first clamping point and a second clamping point respectively distributed frontward and rearward along the plugging direction on the relatively outer sides of the third connecting arm and the fourth connecting arm; the outer surface of the first electrical connector is provided with a first limiting wall and a second limiting wall respectively on both sides of the outer clamping handle, and the first limiting wall and the second limiting wall are respectively provided with a first clamping groove and a second clamping groove distributed frontward and rearward along the plugging direction, the first clamping groove is adapted to the first clamping point, and the length of the second clamping groove along the plugging direction corresponds to the distance the position ensuring device moves from the locked position to the unlocked position; When the position ensuring device is in the locked position, the first clamping point is clamped on the first clamping slot, and the second clamping point is clamped on the front end of the second clamping slot; when the position ensuring device slides backward from the locked position to the unlocked position, the second clamping point is clamped on the rear end of the second clamping slot, and the first clamping point is clamped on the front end of the second clamping slot.

10. The electrical connector assembly according to claim 9, characterized in that: The position ensuring device further has a guide slide block protruding from the bottom of the stopper and extending in the plugging direction; a guide groove extending in the plugging direction and cooperating with the guide slide block is correspondingly formed on the outer surface of the first electrical connector.

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