Anti-loosening and anti-falling plugboard

Abstract

The invention discloses an anti-loosening and anti-falling plugboard which comprises a main shell, a face shell and a plugboard cavity, the surface of the face shell is provided with an adaptive groove and a jack which are matched with a plug, and the circumferential annular wall of the adaptive groove is provided with a tongue hole. A clamping tongue, a pressing locking assembly and a first elastic piece are arranged in the insertion plate cavity, the clamping tongue and the lock hole of the plug are in insertion fit, and the pressing locking assembly and the first elastic piece jointly act on the clamping tongue, so that the clamping tongue is inserted into the lock hole or retreats from the lock hole. Through the synergistic effect of multiple assemblies, plugging self-adaptive locking is achieved, low operating force and high anti-loosening reliability are achieved, meanwhile, the functions of mistaken touch prevention, dust prevention, water prevention and electric signal feedback are integrated, and the problem of contradiction between the anti-loosening performance and plugging convenience of a traditional plug board is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of electrical appliances and electric vehicle accessories, and in particular to an anti-loosening and anti-falling plug board. Background Art

[0002] In the field of electric vehicle technology, the reliability of the electrical connection system is directly related to the safety and operational stability of the entire vehicle. As the core interface for energy transmission, the connection reliability between the socket and the plug is particularly critical. In high-voltage and high-current transmission scenarios, the micro-discharge phenomenon caused by poor contact between the socket and the plug will accelerate the oxidation of the contact surface, forming a vicious cycle of increased contact resistance and abnormal temperature rise. Existing electric vehicles generally have the phenomenon of loose connectors due to dynamic conditions such as driving vibration and mechanical shock. This phenomenon is particularly prominent in commercial vehicles and models with long mileage.

[0003] The existing anti-loosening structure of sockets and plugs often adopts an over-clamping design, resulting in a single plug-in and pull-out force exceeding 80N (exceeding the 50N threshold recommended by ergonomics), which is extremely unfriendly to female users and the elderly. In addition, there are anti-loosening structures such as mechanical lock structures or threaded fastening. Although such designs can improve the stability of the connection, they have significant defects: the lock mechanism requires additional operation steps, resulting in reduced plug-in efficiency and affecting the user experience; the threaded structure has the risk of secondary loosening due to time-consuming screwing operations and thread wear.

[0004] Therefore, there is an urgent need to develop a new type of anti-loosening and anti-falling plug plate to maintain the stability of the electrical connection under the continuous vibration conditions of vehicle driving and meet the high-frequency and low-operating-force plug-in and pull-out requirements. Summary of the invention

[0005] In order to solve the technical contradiction between the anti-loosening performance and the convenience of plugging and unplugging of the existing anti-loosening plug plate, the present invention provides an anti-loosening and anti-falling plug plate.

[0006] The technical solution adopted by the present invention is as follows: an anti-loosening and anti-falling plug board, characterized in that it includes: a main shell; a face shell, which is installed as a whole with the main shell to form a plug board cavity, the surface of the face shell is provided with an adaptation groove matching the shape of the plug and a socket matching the pin of the plug, and a tongue hole is provided on the circumferential ring wall of the adaptation groove; a conductive clamp is arranged in the plug board cavity and matches the pin of the plug; a tongue is movably installed in the plug board cavity, having a first position extending from the tongue hole and inserted into the lock hole on the circumferential wall of the plug, and a second position withdrawn from the lock hole; a pressing locking assembly and a first elastic member jointly act on the tongue to switch the tongue between the first position and the second position.

[0007] Preferably, it includes a locking arm of a lever structure, the middle part of which is hinged to the main shell or the face shell, the first end forms the latch tongue, and the second end forms a wedge head that cooperates with the push-locking assembly; the first elastic member acts on the locking arm to cause the latch tongue to tend to the second position.

[0008] Preferably, the push-locking assembly includes: a sliding claw sleeve having indexing teeth, the upper ends of the indexing teeth forming a guide ramp; a pressing rod having guide grooves evenly distributed circumferentially, the lower end of which forms an inclined sliding fit with the guide ramp; a guide rail sleeve having guide rails evenly distributed circumferentially on the inner surface, the guide rails slidingly fit with the indexing teeth and the guide grooves, the lower end of the guide rails forming a slot matching the guide ramp; a driving member having a driving ramp that forms an inclined wedge transmission mechanism with the wedge head; a second elastic member arranged between the sliding claw sleeve and the driving member so that the driving ramp tends to approach the wedge head.

[0009] Preferably, the push-lock assembly further comprises a third elastic member, which is disposed between the main housing and the driving member so that the driving inclined surface tends to separate from the wedge head.

[0010] Preferably, the push-lock assembly also includes a button, which is installed on the face shell in a circumferentially fixed and axially slidable manner, is arranged above the push rod, and is linked with the push rod under the action of external force or the second elastic member.

[0011] Preferably, the driving member is a symmetrical structure, with a driving slope formed at each end, and the locking arm and the first elastic member are also arranged in two groups symmetrical on the left and right, and the two latches are synchronously plugged into the locking hole from both sides.

[0012] Preferably, the driving member is a metal member, provided with two moving contacts, a signal terminal is provided in the main shell, and two static contacts are correspondingly provided to the signal terminal; after the driving member descends, the moving contact contacts with the static contact.

[0013] Preferably, it also includes a safety card and a fourth elastic member; the safety card is slidably installed in the main shell, and is provided with transition holes corresponding to the sockets one by one, and the transition hole corresponding to the ground wire pin is provided with a plug-in slope; the safety card has a third position in which the transition hole is misaligned with the socket when the plug is pulled out and moves under the action of the fourth elastic member, and a fourth position in which the transition hole is aligned with the socket when the plug is inserted and moves under the action of the ground wire pin and the plug-in slope.

[0014] Preferably, a blocking portion is formed at one end of the safety card; when the safety card is in the third position, the blocking portion blocks the push-lock assembly from being pressed downward, and when the safety card is in the fourth position, the blocking portion is separated from the push-lock assembly.

[0015] The present invention has the following beneficial effects: 1. Low operating force to prevent loosening: By pressing the locking component and the elastic part, the tongue of the plug board and the lock hole of the plug can be quickly plugged in or out, solving the problem of excessive operating force or complicated operation process of the traditional structure, and realizing the dual optimization of adaptive locking and humanized operation under dynamic working conditions; 2. Control height dimension: The locking arms are arranged on both sides of the plug-in board cavity, so that the tongue can fix the plug from both sides, which improves the reliability without increasing the height of the plug-in board cavity, and is suitable for use in compact spaces; 3. Protection against accidental touch: The safety card blocks the operation of the pressing and locking assembly when the plug is not fully inserted, ensuring that the tongue is retracted into the cavity of the plug board in this state, avoiding the tongue from blocking the insertion of the plug and preventing the tongue from being damaged due to accidental operation; 4. Dustproof and waterproof: When the plug is unplugged, the jack is sealed by a safety card to prevent dust and water, thus improving safety; 5. Intelligent electrical signal feedback: After the moving contact of the driver contacts the static contact, the signal circuit is turned on, and the plug-in status and plug-in times are detected and recorded in real time to achieve intelligent operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of a plug board and a plug in an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of the plug board in an embodiment of the present invention (the cover is omitted).

[0018] Figure 3 Schematic diagram of an exploded view of a plug board in an embodiment of the present invention.

[0019] Figure 4 It is a cross-sectional view of the press-lock assembly in an embodiment of the present invention.

[0020] Figure 5 Schematic diagram of a locking arm in an embodiment of the present invention.

[0021] Figure 6 Schematic diagram of a security card and a button in an embodiment of the present invention.

[0022] Plug-in board A: Main shell 1; Surface shell 2, adapter slot 2.1, plug hole 2.2, tongue hole 2.3; Insert plate cavity 3; Conductive chuck 4; A first elastic member 5; Locking arm 6, latch tongue 6.1; Sliding claw sleeve 7, indexing teeth 7.1, guide inclined surface 7.2; Pressing rod 8, guide groove 8.1; Guide rail sleeve 9, guide rail 9.1, slot 9.2; Driving member 10, driving inclined surface 10.1, moving contact 10.2; The second elastic member 11, A third elastic member 12; Button 13; Signal terminal 14, static contact 14.1; Safety card 15, transition hole 15.1, plugging slope 15.2, blocking part 15.3; The fourth elastic member 16 .

[0023] Plug B: Pin 17; Keyhole 18. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the embodiments and drawings.

[0025] In the embodiment, Figure 1-Figure 6 As shown, a plug board A and its corresponding plug B are shown. The plug board A comprises: a main shell 1; a face shell 2, which is installed as a whole with the main shell 1 to form a plug board cavity 3, the surface of the face shell 2 is provided with an adapting groove 2.1 matching the shape of the plug B and a plug hole 2.2 matching the plug pin 17 of the plug B, and a tongue hole 2.3 is provided on the circumferential ring wall of the adapting groove 2.1; a conductive clamp 4, which is arranged in the plug board cavity 3 and matches the plug pin of the plug B; a latch 6.1, which is movably installed in the plug board cavity 3, has a first position extending from the tongue hole 2.3 and inserting into the lock hole 18 on the circumferential wall of the plug B, and a second position withdrawing from the lock hole 18; a pressing locking assembly and a first elastic member 5, which jointly act on the latch 6.1, so that the latch 6.1 switches between the first position and the second position. The design of the adapting groove 2.1 ensures that the latch 6.1 is precisely aligned with the lock hole 18, thereby avoiding jamming during the plugging and unplugging process. This embodiment realizes the automatic locking and release of the latch 6.1 in the lock hole 18 of the plug B by pressing the locking assembly and the first elastic member 5, thereby ensuring the anti-loosening performance of the plug B in a vibration environment and optimizing the operating force by pressing the locking assembly and the first elastic member 5, thereby solving the problem of excessive operating force of the traditional mechanical lock.

[0026] In the embodiment, Figure 2 , Figure 5As shown, the plug board A has a locking arm 6 of a lever structure, the middle part of the locking arm 6 is hinged to the main shell 1 or the face shell 2, the first end forms a latch tongue 6.1, and the second end forms a wedge head 6.2 that cooperates with the push-lock assembly; the first elastic member 5 acts on the locking arm 6 to make the latch tongue 6.1 tend to the second position. The locking arm 6 of the lever structure converts the axial movement of the push-lock assembly into the radial movement of the latch tongue 6.1, thereby realizing the operation of the push-lock assembly from the face shell 2, and the arrangement position of the push-lock assembly is more eye-catching and less prone to misoperation.

[0027] In the embodiment, Figure 3 , Figure 4 As shown, the push-lock assembly includes: a sliding claw sleeve 7, having a dividing tooth 7.1, and the upper end of the dividing tooth 7.1 forms a guiding inclined surface 7.2; a pressing rod 8, having guide grooves 8.1 uniformly distributed in the circumference, and the lower end forms an inclined sliding fit with the guiding inclined surface 7.2; a guide rail sleeve 9, the inner surface of which has guide rails 9.1 uniformly distributed in the circumference, and the guide rails 9.1 slide and fit with the dividing teeth 7.1 and the guide grooves 8.1, and the lower end of the guide rails 9.1 forms a clamping groove 9.2 matching the guiding inclined surface 7.2; a driving member 10, having a driving inclined surface 10.1 that forms an inclined wedge transmission mechanism with the wedge head 6.2; a second elastic member 11, which is arranged between the sliding claw sleeve 7 and the driving member 10, so that the driving inclined surface 10.1 tends to approach the wedge head 6.2.

[0028] The operation steps of the push-lock assembly in this embodiment are as follows: (1) When pressed, the pressing rod 8 moves downward in the axial direction, and the guide grooves 8.1 uniformly distributed around the pressing rod 8 form a sliding fit with the guide rails 9.1 of the guide rail sleeve 9, guiding the pressing rod 8 to move along a fixed track. At this time, the guide inclined surface 7.2 at the upper end of the indexing teeth 7.1 of the sliding claw sleeve 7 contacts the lower end of the pressing rod, generating a radial component force, forcing the sliding claw sleeve 7 to rotate circumferentially.

[0029] (2) When the pressing rod 8 moves to the end of the guide rail 9.1, the indexing tooth 7.1 enters the groove 9.2 of the guide rail sleeve 9 under the action of the rebound force of the second elastic member 11. At this time, the rotation angle of the sliding claw sleeve 7 makes the indexing tooth 7.1 mesh with the groove 9.2, and the sliding claw sleeve 7 is fixed in a low position, which in turn drives the second elastic member 11 and the driving member 10 to descend, thereby causing the driving inclined surface 10.1 to push the wedge head 6.2, causing the locking arm 6 to swing, and the locking tongue 6.1 passes through the tongue hole 2.3 and is inserted into the locking hole 18 of the plug B.

[0030] (3) When pressed again, the pressing rod 8 moves downward along the guide rail, forcing the indexing teeth 7.1 of the sliding claw sleeve 7 to disengage from the slot 9.2, and the second elastic member 11 drives the pressing rod 8 to retreat. At this time, the sliding claw sleeve 7 is out of the locked state during the rotation process.

[0031] (4) The indexing teeth 7.1 rotate with the sliding claw sleeve 7, and the pressing rod 8 is completely retracted along the guide rail under the action of the second elastic member 11. The driving member 10 loses pressure, and the locking arm 6 rebounds under the action of the first elastic member 5. The latch tongue 6.1 withdraws from the locking hole 18 of the plug B, realizing the two-way state switching.

[0032] The push-lock assembly of this embodiment has reliable performance. The sliding claw sleeve 7 is positioned at two different heights through the sliding cooperation and rotation of the indexing teeth 7.1 and the guide rail sleeve 9, thereby ensuring reliable switching of the latch tongue 6.1 between the first position and the second position.

[0033] In the embodiment, Figure 3 , Figure 4 As shown, the push-lock assembly further includes a third elastic member 12, which is disposed between the main housing 1 and the driving member 10, so that the driving inclined surface 10.1 tends to separate from the wedge head 6.2. The third elastic member 12 and the second elastic member 11 form a double elastic system, which balances the reset force of the driving member 10 and the unlocking force of the locking arm 6, avoids the reset jam of the driving member 10, and ensures the smooth return of the latch tongue 6.1. In addition, the double elastic system is also conducive to improving the feedback feel of the pressing operation.

[0034] In the embodiment, Figure 3 , Figure 4 As shown, the push lock assembly also includes a button 13, which is fixed circumferentially and slidably mounted on the face shell 2, arranged above the push rod 8, and linked with the push rod 8 under the action of external force or the second elastic member 11. The button 13 is assembled through a keyway or notch structure to ensure that the pressing direction is always vertical, avoid the mechanism jamming caused by the lateral force, and optimize the operating feel. The button 13 can also be provided with a striking mark.

[0035] In the embodiment, Figure 2 , Figure 3 As shown, the driving member 10 is a symmetrical structure, with a driving inclined surface 10.1 formed at each end. The locking arm 6 and the first elastic member 5 are also arranged in two groups symmetrically, and the two latches 6.1 are plugged into the locking holes 18 on both sides. The symmetrically arranged double latches 6.1 can not only improve the resistance of the plug B to the lateral withdrawal force, but also make the plug B bear the force evenly, eliminate the tilting problem caused by unilateral locking, and do not increase the height of the plug board cavity, which is suitable for use in compact space. The driving member 10 has a symmetrical structure, and at the same time ensures the action synchronization of the driving inclined surfaces 10.1 on both sides.

[0036] In the embodiment, Figure 2 , Figure 3As shown, the driving member 10 is a metal member, which is provided with two moving contacts 10.2. A signal terminal 14 is provided in the main shell 1, and the signal terminal 14 is correspondingly provided with two static contacts 14.1; after the driving member 10 descends, the moving contact 10.2 contacts the static contact 14.1. In this embodiment, the two signal terminals 14 are connected through the contact between the moving contact 10.2 and the static contact 14.1, and the locking state of the plug B is fed back in real time. The metal material of the driving member 10 not only ensures conductivity, but also compensates for assembly tolerances through elastic deformation. The signal terminal 14 is connected to the main control system, based on the number of conduction signals and monitoring of poor contact, to achieve intelligent operation and maintenance.

[0037] In the embodiment, Figure 3 , Figure 6 As shown, the main housing 1 also includes a safety card 15 and a fourth elastic member 16; the safety card 15 is slidably installed in the main housing 1, and is provided with a transition hole 15.1 corresponding to the socket 2.2, and the transition hole 15.1 corresponding to the ground wire pin is provided with a plugging slope 15.2; the safety card 15 has a third position in which the transition hole 15.1 is misaligned with the socket 2.2 when the plug B is pulled out, and a fourth position in which the transition hole 15.1 is aligned with the socket 2.2 when the plug B is inserted, and the transition hole 15.1 of the safety card 15 is misaligned with the socket 2.2 by the action of the ground wire pin and the plugging slope 15.2. The misalignment between the transition hole 15.1 and the socket 2.2 of the safety card 15 ensures that the socket 2.2 is completely closed when not inserted, which plays a good waterproof and dustproof role. The plugging slope 15.2 is designed to make the longer ground wire pin contact first, so that the ground wire pin serves as the sliding moving force source of the safety card 15.

[0038] In the embodiment, Figure 3 , Figure 6 As shown, one end of the safety card 15 forms a blocking portion 15.3; when the safety card 15 is in the third position, the blocking portion 15.3 blocks the push-lock assembly from being pressed downward, and when the safety card 15 is in the fourth position, the blocking portion 15.3 is separated from the push-lock assembly. The blocking portion 15.3 of this embodiment actually blocks the button 13 of the push-lock assembly. When the plug B is fully inserted, the ground wire pin acts on the plugging slope 15.2, so that the safety card 15 reaches the fourth position, and the blocking portion 15.3 retracts from under the button 13, eliminating the mechanical interference. Only then can the button 13 be pressed, so that the tongue 6.1 extends out and is inserted into the lock hole 18 on the circumferential wall of the plug B. When the plug B is pulled out, the safety card 15 pops out under the action of the fourth elastic member 16 and reaches the third position. The blocking portion 15.3 extends to the bottom of the button 13, forming a mechanical interference to block the operation of the button 13, ensuring that the tongue 6.1 is retracted into the plug board cavity 3 in this state, avoiding the tongue 6.1 from blocking the insertion process of the plug B and preventing the tongue 6.1 from being damaged due to misoperation. This linkage design strictly associates the anti-mistouch protection with the plugging state, and can 100% prevent mislocking operations in the non-fully plugged state.

[0039] Obviously, the above embodiments of the present invention are only examples for explaining the present invention, and are not intended to limit the implementation methods of the present invention. Other obvious changes or modifications derived from the essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A plug plate (A) for preventing loosening and falling off, characterized in that: include: Main shell (1); A face shell (2) is installed integrally with the main shell (1) to form a plug board cavity (3); a surface of the face shell (2) is provided with an adapting groove (2.1) matching the shape of the plug (B) and a plug hole (2.2) matching the plug pin (17) of the plug (B); a tongue hole (2.3) is provided on the circumferential ring wall of the adapting groove (2.1); A conductive clamp (4) is arranged in the plug board cavity (3) and matches the plug pins of the plug (B); A latch tongue (6.1) is movably mounted in the plug board cavity (3), and has a first position where it extends out of the tongue hole (2.3) and is inserted into a lock hole (18) on the circumferential wall of the plug (B), and a second position where it is withdrawn from the lock hole (18); The locking assembly and the first elastic member (5) are pressed to jointly act on the latch tongue (6.1), causing the latch tongue (6.1) to switch between the first position and the second position.

2. The anti-loosening and anti-falling plug board (A) according to claim 1, characterized in that: The invention comprises a locking arm (6) of a lever structure, wherein the middle part of the locking arm (6) is hinged to the main shell (1) or the face shell (2), the first end forms the latch tongue (6.1), and the second end forms a wedge head (6.2) matched with the push-locking assembly; the first elastic member (5) acts on the locking arm (6) to make the latch tongue (6.1) tend to the second position.

3. The anti-loosening and anti-falling plug board (A) according to claim 2, characterized in that: The push-lock assembly comprises: The sliding claw sleeve (7) has indexing teeth (7.1), and the upper ends of the indexing teeth (7.1) form guide inclined surfaces (7.2); The pressing rod (8) has guide grooves (8.1) evenly distributed in the circumferential direction, and the lower end forms an inclined sliding fit with the guide inclined surface (7.2); A guide rail sleeve (9), the inner surface of which is evenly distributed with guide rails (9.1) in the circumferential direction, the guide rails (9.1) being slidably matched with the indexing teeth (7.1) and the guide grooves (8.1), and the lower end of the guide rails (9.1) forming a slot (9.2) matching the guide inclined surface (7.2); A driving member (10) having a driving inclined surface (10.1) which forms an inclined wedge transmission mechanism with the wedge head (6.2); The second elastic member (11) is arranged between the sliding claw sleeve (7) and the driving member (10), so that the driving inclined surface (10.1) tends to approach the wedge head (6.2).

4. The anti-loosening and anti-falling plug board (A) according to claim 3, characterized in that: The push-lock assembly further comprises a third elastic member (12) which is arranged between the main housing (1) and the driving member (10) so that the driving inclined surface (10.1) tends to separate from the wedge head (6.2).

5. The anti-loosening and anti-falling plug board (A) according to claim 3, characterized in that: The push-lock assembly further comprises a button (13), which is mounted on the face shell (2) in a circumferentially fixed and axially slidable manner, is arranged above the push rod (8), and is linked to the push rod (8) under the action of an external force or the second elastic member (11).

6. The anti-loosening and anti-falling plug board (A) according to claim 3, characterized in that: The driving member (10) is of a symmetrical structure, with a driving inclined surface (10.1) formed at each end. The locking arm (6) and the first elastic member (5) are also arranged as two groups symmetrical on the left and right, and the two latching tongues (6.1) are synchronously plugged into the locking hole (18) from both sides.

7. The anti-loosening and anti-falling plug board (A) according to claim 6, characterized in that: The driving member (10) is a metal member and is provided with two moving contacts (10.2); a signal wiring terminal (14) is provided in the main housing (1); and the signal wiring terminal (14) is correspondingly provided with two stationary contacts (14.1); after the driving member (10) descends, the moving contacts (10.2) come into contact with the stationary contacts (14.1).

8. The anti-loosening and anti-falling plug board (A) according to claim 1, characterized in that: It also includes a safety card (15) and a fourth elastic member (16); the safety card (15) is slidably mounted in the main shell (1), and is provided with transition holes (15.1) corresponding one-to-one to the plug holes (2.2); the transition hole (15.1) corresponding to the ground wire pin is provided with a plugging inclined surface (15.2); The safety card (15) has a third position in which the transition hole (15.1) and the plug hole (2.2) are misaligned when the plug (B) is pulled out and the safety card (15) moves under the action of the fourth elastic member (16), and has a fourth position in which the transition hole (15.1) and the plug hole (2.2) are aligned when the plug (B) is inserted and the safety card (15) moves under the action of the ground wire pin and the plugging inclined surface (15.2).

9. The anti-loosening and anti-falling plug board (A) according to claim 8, characterized in that: One end of the safety card (15) forms a blocking portion (15.3); when the safety card (15) is in the third position, the blocking portion (15.3) blocks the push-lock assembly from being pressed downward; when the safety card (15) is in the fourth position, the blocking portion (15.3) is separated from the push-lock assembly.

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