A connector unlocking protection device

Abstract

This invention relates to a connector unlocking protection device, comprising a handle rotatably mounted on a plug housing, a locking plate slidably mounted on the plug housing, and a tail cap mounted on the end of the plug housing. The locking plate is slidably engaged with the handle to lock it in place. A locking plate is also secured to the tail cap, with its engagement direction perpendicular to the sliding direction of the locking plate. When the locking plate is in the locked position on the tail cap, its front end abuts against the rear end of the locking plate to restrict the locking plate from sliding to the unlocked position. Under external prying force, the locking plate moves away from the locked position on the tail cap, thus releasing the restriction on the sliding of the locking plate. This invention uses a locking plate to lock the locking plate of the handle, preventing manual release of the handle's locking state before the locking plate is unlocked by a tool, thereby improving the safety of high-voltage connectors and electric vehicles.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of connectors for electric vehicles, and particularly relates to a connector unlocking protection device. BACKGROUND

[0002] With the improvement of the safety performance of electric vehicles, higher requirements are put forward for the safety performance of equipment interfaces. As core components of electric vehicles, the reliability and stability of the design of high-voltage connectors are key links related to the safety of the whole vehicle. According to the safety requirements of electric vehicles, some high-voltage connectors need to realize the function of mechanical unlocking, that is, the mechanical unlocking mechanism needs to be opened with the help of a tool, and then the handle locking mechanism of the high-voltage connector can be further opened.

[0003] However, at present, most high-voltage connectors do not use tools and can directly realize manual unlocking operation to open the handle locking mechanism, which does not meet the requirement of realizing mechanical unlocking operation, leaving hidden dangers for the safety of the whole electric vehicle. SUMMARY

[0004] The purpose of the application is to provide a connector unlocking protection device, which locks the locking piece of the handle by setting the locking piece, and the handle cannot be manually unlocked before the locking piece is unlocked by a tool, thereby improving the safety of the high-voltage connector and the electric vehicle.

[0005] In order to achieve the above purpose, the technical scheme adopted by the application is: a connector unlocking protection device, comprising a handle rotatably installed on a plug shell, a locking piece slidingly arranged on the plug shell, and a tail cover installed at the end of the plug shell, the locking piece is locked on the handle by sliding and clamping, the tail cover is provided with the locking piece, the clamping direction of the locking piece on the tail cover is perpendicular to the sliding direction of the locking piece, when the locking piece is in the locking position on the tail cover, the front end of the locking piece abuts against the rear end of the locking piece to limit the sliding of the locking piece to the unlocking position, and under the action of external force, the locking piece leaves the locking position on the tail cover to release the sliding limitation of the locking piece.

[0006] The locking piece comprises a locking piece body, first bosses for clamping in first clamping grooves on the tail cover are arranged on the left and right sides of the locking piece body, a pair of elastic pressing plates are arranged on the lower surface of the locking piece body, second bosses are arranged on the outer side surfaces of the elastic pressing plates, extrusion inclined surfaces are arranged on the side surfaces of the second bosses, and the two elastic pressing plates and the fixed holes in the bottom of the first clamping grooves are connected in interference fit.

[0007] When the locking piece leaves the locking position on the tail cover, the boss flat surface of the second boss is clamped on the lower edge of the fixed hole, or the boss flat surface of the second boss is lower than the lower edge of the fixed hole.

[0008] The inner side of the first clamping groove is provided with a rib protruding from the inner side, when the locking piece is installed, the first boss of the locking piece forces the side wall of the first clamping groove to open outward by extruding the rib, and after the locking piece is clamped into the first clamping groove, the rib can be abutted against the upper edge of the first boss.

[0009] The front end or the rear end of the fixing hole is provided with a key groove, and the lower surface of the locking piece body is provided with a mounting key matched with the key groove.

[0010] The tail cover is provided with a second clamping groove, and the plug shell is provided with a clamping boss matched with the second clamping groove to realize the fixed connection of the tail cover and the plug shell.

[0011] The beneficial effects of the present application are that the structure for fixing the locking piece is integrated on the tail cover, the integration degree of the tail cover can be improved, the number of parts can be reduced, and the unlocking protection device is more compact.

[0012] The present application is suitable for the connector for locking the handle through the locking piece, only the structure of the tail cover needs to be improved, and the structures and connection relationship of other parts such as the plug shell, the handle and the locking piece do not need to be changed, so it can be used for the modification of the existing connector, and is conducive to the popularization and use of the present application.

[0013] The first boss on the locking piece, the elastic pressing plate and the interference fit of the mounting hole are pressed by the rib on the first clamping groove, so that the locking piece and the tail cover are more firmly buckled, the falling of the locking piece in use is avoided, and the firm cooperation also requires that the locking piece can be pried up only by using a tool, so as to meet the mechanical unlocking requirement of the connector.

[0014] In the present application, the reverse installation of the locking piece can be avoided through the cooperation of the mounting key on the locking piece and the key groove of the mounting hole. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is an exploded view of the parts of the present application;

[0016] Figure 2 It is a schematic view of the locking piece buckling in the present application;

[0017] Figure 3 It is a schematic view of the locking piece being pried up by a tool in the present application;

[0018] Figure 4 It is a structural schematic view of the locking piece in the present application;

[0019] Figure 5 It is a structural schematic view of the tail cover in the present application;

[0020] Figure 6 It is another view of the tail cover in the present application;

[0021] Marked in the figure: 1, plug shell, 2, handle, 3, locking piece, 4, locking piece, 401, locking piece body, 402, first boss, 403, mounting key, 404, elastic pressing plate, 405, second boss, 5, tail cover, 501, first clamping groove, 502, fixing hole, 503, rib, 504, second clamping groove, 505, keyway, 506, inner wall of fixing hole, 6, pry plate. DETAILED DESCRIPTION

[0022] The application will be further described in detail below in combination with the drawings and examples, but not as any basis for limiting the application.

[0023] The embodiment takes a two-core high-voltage connector as an example to make a detailed description of the specific structure and use method of the connector unlocking protection device described in the application, but it needs to be noted that the structure of the application can be applied to other connectors that lock the handle through sliding locking pieces.

[0024] As shown in Figure 1 , the connector unlocking protection device includes a handle 2, a locking piece 3, a tail cover 5 and a locking piece 4, wherein the handle 2 is a U-shaped structure and is rotatably installed on the plug shell 1 of the connector, and by rotating to the locking position, the locking piece 3 installed on the plug shell 1 slides forward and can be buckled in the insertion slot on the handle 2 to achieve the locking of the handle 2; the tail cover 5 is installed on the plug shell 1 at the other end opposite to the handle 2, and after the locking piece 4 is installed on the tail cover 5, the front end of the locking piece 4 can be abutted against the rear end of the locking piece 3 to limit the forward and backward sliding of the locking piece 3, thereby locking the position of the locking piece 3.

[0025] In order to achieve the installation of the locking piece 4 on the tail cover 5, as shown in Figure 4 , the left and right sides of the locking piece body 401 are provided with first bosses 402 protruding to both sides, and the lower surface of the locking piece body 401 is further provided with two elastic pressing plates 404 arranged face to face, the outer side surface of the lower end of the elastic pressing plate 404 is provided with a second boss 405, the lower surface of the second boss 405 is a pressing inclined surface, and the position between the two elastic pressing plates 404 is further provided with a mounting key 403, which is arranged at the rear end of the locking piece body 401.

[0026] As shown in Figure 5 , 6As shown, the tail cover 5 is provided with a first clamping groove 501 for mounting the locking piece 4, the bottom of the first clamping groove 501 is provided with a fixing hole 502 for the elastic pressing plate 404 to pass through, the fixing hole 502 and the two elastic pressing plates 404 are in interference fit, the inner side of the first clamping groove 501 is provided with a rib 503 protruding from the inner side, the rear end of the fixing hole 502 is provided with a key groove 505 matched with the mounting key 403; the tail cover 5 is provided with a second clamping groove 504, and the plug shell 1 is provided with a clamping table matched with the second clamping groove 504 to realize the fixed connection of the tail cover 5 and the plug shell 1.

[0027] As preferred, a certain thickness of baffle can be arranged around the two elastic pressing plates 404 on the lower surface of the locking piece body 401, so that after the locking piece 4 is mounted on the tail cover 5, a gap is formed between the locking piece body 401 and the bottom of the first clamping groove 501 of the tail cover 5, which is convenient for the insertion of a pry bar 6 or the like. The baffle can be integrally formed with the locking piece body.

[0028] The specific use method of the present application will be described below.

[0029] First, rotate the handle 2 to the locking position, slide the locking piece 3 forward, so that the locking piece 3 is inserted into the insertion slot on the handle 2 to lock the handle 2; second, insert the locking piece 4 into the fixing hole 502 and the first clamping groove 501 on the tail cover 5, the inner wall 506 of the fixing hole extrudes the extrusion slope of the second boss 405, forcing the lower end of the elastic pressing plate 404 to move to the middle, reducing the distance between the two second bosses, so that it passes through the fixing hole 502 and then the elastic pressing plate 404 resets, the elastic pressing plate 404 is in interference fit with the inner wall 506 of the fixing hole, continue to press down the locking piece 4, the first boss 402 extrudes the rib 503 on both sides, enters the first clamping groove 501, and the rib 503 is pressed on the first boss 402, at this time the installation of the locking piece 4 is completed, and the locking piece 4 is in the locking position on the tail cover 5; it should be noted that the installation of the locking piece 4 should pay attention to the corresponding relationship of the mounting key 403 and the key groove 505; third, install the tail cover 5 with the locking piece 4 on the tail end of the plug shell 1, and clamp the second clamping groove 504 through the clamping table of the plug shell 1, at this time the front end of the locking piece 4 is tightly pressed against the locking piece 3, and the locking piece 3 cannot slide forward and backward, thereby protecting the locking structure, as shown in Figure 2 As shown, the locking piece 3 cannot unlock the handle 2; finally, when unlocking is needed, the tip of the pry bar 6 can be inserted under the locking piece 4 to pry up the locking piece 4, as shown in Figure 3 As shown, the locking piece 4 is pried up to move away from the locking position, thereby removing the restriction on the locking piece 3, thereby playing a mechanical unlocking role, and the locking piece 3 slides backward to move away from the handle 2, so that the handle 2 can be pulled.

[0030] When the locking piece 4 is pried away from the locking position, the first boss 402 of the locking piece 4 is away from the first clamping groove 501, and at this time, the boss plane of the second boss 405 is clamped at the lower edge of the fixing hole 502 or is lower than the lower edge of the fixing hole 502, that is, the limit position of the upward prying of the locking piece 4 is that the boss plane of the second boss 405 is clamped at the lower edge of the fixing hole 502, and thus the second boss 405 can prevent the locking piece 4 from falling off the tail cover 5.

[0031] Therefore, the high-voltage connector realizes the function of unlocking the high-voltage connector locking structure by a tool (such as a pry plate) through the cooperation of the tail cover 5 and the locking piece 4. The tail cover 5 not only realizes the fixation of the connector wire and the limiting of the sealing wire body and other parts, but also realizes the supporting and limiting of the locking piece 4, and the tail cover structure is compact and can save installation space.

[0032] The above embodiments are only used to illustrate the technical solutions of the present application but not to limit it, and those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced by the equivalent according to the above embodiments, and any modification or equivalent replacement without departing from the spirit and scope of the present application is within the protection scope of the claims.

Claims

1. A connector unlocking protection device, comprising a handle rotatably installed on a plug housing, a locking piece slidably arranged on the plug housing, and a tail cover installed on an end portion of the plug housing, the locking piece locking the handle by being slidably buckled on the handle, characterized in that: The locking piece is arranged on the tail cover, and the clamping direction of the locking piece on the tail cover is perpendicular to the sliding direction of the locking piece. When the locking piece is in the locking position on the tail cover, the front end of the locking piece abuts against the rear end of the locking piece to limit the sliding of the locking piece to the unlocking position. Under the action of external force prying, the locking piece leaves the locking position on the tail cover to release the sliding limitation of the locking piece. The locking piece comprises a locking piece body, and first bosses for clamping in first clamping grooves on the tail cover are arranged on the left and right sides of the locking piece body. A pair of elastic pressing plates are arranged on the lower surface of the locking piece body, and second bosses are arranged on the outer side surfaces of the elastic pressing plates. The side surfaces of the second bosses are provided with extrusion inclined surfaces, and the two elastic pressing plates and the fixed holes in the bottom of the first clamping grooves are connected in interference fit.

2. A connector unlock protection device according to claim 1, characterized in that: When the locking piece leaves the locking position on the tail cover, the boss flat surface of the second boss is clamped at the lower edge of the fixed hole, or the boss flat surface of the second boss is lower than the lower edge of the fixed hole.

3. A connector unlock protection device according to claim 1 or 2, characterized in that: The inner side surface of the first clamping groove on the tail cover is provided with a rib protruding from the inner side surface. When the locking piece is installed, the first boss of the locking piece forces the side wall of the first clamping groove to expand outward by extruding the rib. After the locking piece is clamped into the first clamping groove, the rib can be abutted against the upper edge of the first boss.

4. A connector unlock protection device according to claim 3, wherein: The front end or the rear end of the fixed hole on the tail cover is provided with a key groove, and the lower surface of the locking piece body is provided with a mounting key matched with the key groove.

5. A connector unlock protection device according to claim 4, wherein: The tail cover is provided with a second clamping groove, and the plug shell is provided with a clamping post matched with the second clamping groove to realize the fixed connection of the tail cover and the plug shell.

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