Locking type anti-pulling structure of vehicle lamp wire harness connector

Abstract

The utility model discloses a kind of locking type anti-pulling structures of car light wire harness plug-in connector, including plug-in connector, fixed frame, wire harness fixing device, elastic strap, sliding sheet and elastic traction rope, plug-in connector includes plug-in main body, the back of plug-in main body is equipped with convex part, convex part and the back of plug-in main body form sliding slot, sliding sheet is embedded in sliding slot and can slide left and right, elastic strap connects wire harness fixing device and plug-in connector, elastic traction rope connects sliding sheet and wire harness fixing device, elastic traction rope can be pulled sliding sheet sliding along with the movement of wire harness fixing device, the utility model can when terminal lead wire is pulled more than a certain degree, can drive sliding sheet to jam pin terminal, while pin terminal is displaced outward when being pulled, meet sliding sheet blocking, pulling force is outwardly applied to sliding sheet, increase the friction of sliding sheet and convex part, reduce the probability of sliding sheet slip.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting wiring harness technology, specifically a locking anti-pull structure for an automotive lighting wiring harness connector. Background Technology

[0002] In the modern automotive industry, wiring harnesses serve as the "nerves and blood vessels" of a vehicle, bearing the crucial responsibility of power transmission and signal control. The headlight wiring harness connector, as a key interface connecting the headlights and the vehicle body wiring harness, directly impacts the vehicle's lighting function, driving safety, and signal indication. However, vehicles operate under complex conditions over extended periods, including continuous mechanical vibrations and external environmental bumps, which can exert outward pulling forces on the wiring harness, causing the pins to come loose and resulting in pin retraction.

[0003] A prior art Chinese patent application (application number: 202220345917.5) discloses a side-insertion locking anti-reverse pin plug harness, including a headlight connector, a first connector, and a second connector. The headlight connector is electrically connected to both the first and second connectors. The second connector includes a main connector and a locking tab. A row of terminals is inserted into the main connector. The locking tab includes a pressing part, which snaps onto the main connector and presses the row of terminals tightly within the main connector. This plug harness achieves its locking function by directly locking the terminals with the locking tab. However, the tension in the harness is directly applied to the terminal tail through the terminal lead wire, which can easily lead to metal fatigue and breakage due to stress concentration at the terminal tail. Utility Model Content

[0004] The purpose of this utility model is to provide a locking anti-pull structure for a vehicle light wiring harness connector to solve the problems mentioned in the background art.

[0005] The technical solution of this utility model is: a locking anti-pull structure for a vehicle light wiring harness connector, including a connector and a fixing bracket. The connector includes a connector body, and a pair of protrusions, one above the other, are provided on the back of the connector body. The gap between the protrusions and the back of the connector body forms a sliding groove. A sliding piece is slidably connected in the sliding groove. The sliding piece has a first opening and a second opening. A pin terminal passes through the first opening. The area of ​​the first opening is larger than the cross-section of the pin terminal. The pin terminal passes through the connector and its tail is connected to a terminal lead wire. The second opening is slot-shaped, and its width is larger than the diameter of the terminal lead wire and smaller than the diameter of the pin terminal. Several terminal leads are bundled and fixed with a wire strip holder. One side of the sliding piece is fixedly connected to one end of an elastic traction rope. A pair of stops are fixedly provided at the end of the side of the sliding piece connected to the elastic traction rope. A shaft is fixedly provided on the opposite side of the pair of stops. The end of the elastic traction rope away from the sliding piece passes around the shaft and is fixedly connected to the wire strip holder.

[0006] Preferably, a pair of fixing ears are fixedly provided on both sides of the plug-in body, and the fixing ears are fixedly connected to elastic cable ties, the other end of which is fixedly connected to the side of the cable strip retainer.

[0007] Preferably, the elastic traction rope is fixedly connected to the inner side of the elastic cable tie by a cable tie.

[0008] Preferably, the protrusion is "L" shaped, and the slider is slidably connected in the groove formed by the protrusion and the insertion body.

[0009] Preferably, a baffle is fixedly provided on the side of the protrusion away from the stop block, and the baffle is used to prevent the slider from moving to the left.

[0010] Preferably, a spring is horizontally arranged inside the slide groove, with one end of the spring fixedly connected to the inner side of the stop block and the other end of the spring away from the stop block fixedly connected to the side of the slide groove.

[0011] This utility model provides a general utility model with the following improvements and advantages compared with the prior art: Firstly, this utility model provides buffering under instantaneous impact force through the elastic traction rope and elastic cable tie to the terminal lead wire, preventing the mechanism from being damaged due to excessive force, while bearing most of the tensile force and reducing the damage of tensile stress to the internal wires. Secondly, this utility model utilizes the cooperation of a slider and a spring to achieve the following: when tension occurs, the slider moves to the right, which will cause it to lock and tighten the tail of the pin terminal, preventing it from moving backward. The greater the tension, the stronger the locking force of the slider. When the tension disappears, the spring will push the slider back to its original position, making it convenient to pull out and replace the pin terminal. Attached Figure Description

[0012] The present invention will be further explained below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 yes Figure 2 A magnified view of part A in the middle.

[0013] Explanation of reference numerals in the attached figures: 1. Connector; 11. Connector body; 12. Protrusion; 13. Slide groove; 14. Spring; 15. Stop; 16. Shaft; 17. Fixing ear; 18. Baffle; 2. Fixing bracket; 21. Sliding plate; 22. First opening; 23. Second opening; 24. Elastic traction rope; 3. Pin terminal; 4. Terminal lead wire; 5. Cable strip holder; 6. Elastic cable tie Detailed Implementation

[0014] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0015] This utility model provides a general utility model through improvements. The technical solution of this utility model is as follows: like Figures 1-3 As shown, a locking anti-pull structure for a vehicle headlight wiring harness connector includes a connector 1 and a mounting bracket 2. The connector 1 includes a connector body 11. A pair of protrusions 12, one above the other, are provided on the back of the connector body 11. The gap between the protrusions 12 and the back of the connector body 11 forms a groove 13. A sliding piece 21 is slidably connected within the groove 13. The sliding piece 21 has a first opening 22 and a second opening 23. A pin terminal 3 passes through the first opening 22. The area of ​​the first opening 22 is larger than the cross-section of the pin terminal 3, ensuring that the pin terminal 3 can easily pass through without interference. The connector 1 has a terminal lead wire 4 connected to its tail. The second opening 23 is slot-shaped, and its width is greater than the diameter of the terminal lead wire 4 and less than the diameter of the pin terminal 3. Several terminal lead wires 4 are bundled and fixed with a wire bundle retainer 5. The wire bundle is fixed by a snap or adhesive. One side of the slider 21 is fixedly connected to one end of the elastic traction rope 24. A pair of stops 15 are fixedly provided at the end of the side of the slider 21 connected to the elastic traction rope 24. A shaft 16 is fixedly provided on the opposite side of the pair of stops 15. The end of the elastic traction rope 24 away from the slider 21 passes around the shaft 16 and is fixedly connected to the wire bundle retainer 5.

[0016] When the terminal lead 4 is pulled outward, the elastic traction rope 24 pulls the slider 21 to slide to the right within the groove 13. Since the width of the second opening 23 is smaller than the diameter of the pin terminal 3, the rightward movement of the slider 21 will cause it to lock and secure the tail of the pin terminal 3, preventing it from retracting. The greater the pulling force, the stronger the locking force of the slider 21, fundamentally solving the problem of pin retraction caused by the pulling of the wire harness.

[0017] The external pulling force first acts on the robust cable tray retainer 5, and then is transmitted to the slider 21 through the elastic traction rope 24. At the same time, part of the force is borne by the stop block 15 and the shaft 16. This force transmission path cleverly avoids the most vulnerable and critical crimping or soldering points of the pin terminals 3 and the terminal leads 4, protecting them from direct damage and greatly improving the reliability and lifespan of the connection.

[0018] The entire anti-pull locking mechanism, including the slide plate 21, slide groove 13, elastic traction rope 24, and stop block 15, is fully integrated into the connector 1 body and its surroundings, requiring minimal additional space. This makes it ideal for applications in space-constrained environments such as automotive lamp housings. Furthermore, a pair of fixing ears 17 are fixedly provided on both sides of the plug-in body 11, and the fixing ears 17 are fixedly connected to elastic cable ties 6. The other end of the elastic cable ties 6 is fixedly connected to the side of the cable tie fastener 5.

[0019] The elastic cable ties 6 provide another independent pull-resistant barrier. Working in conjunction with the core locking mechanism, they form a double layer of protection. Even in the event of an extreme failure of the core locking mechanism, the elastic cable ties 6 still provide basic pull protection, enhancing system safety.

[0020] The fixing ear 17 and the cable tie distribute the force to both sides of the connector 1 housing, dispersing the tensile force in multiple directions and avoiding stress concentration.

[0021] Furthermore, the elastic traction rope 24 is fixedly connected to the inner side of the elastic cable tie 6 by a cable tie.

[0022] The elastic traction rope 24 is fixed inside the elastic cable tie 6, making the wire harness layout more orderly and compact, avoiding multiple cables and ropes from getting tangled together or interfering with surrounding components, thus improving the maintainability and reliability of the product.

[0023] Furthermore, the protrusion 12 is L-shaped, and the slider 21 is slidably connected in the groove 13 formed by the protrusion 12 and the insertion body 11.

[0024] The "L"-shaped protrusion 12 and the slider 21 form a stable sliding pair, ensuring that the slider 21 can only slide horizontally along the designed trajectory and will not tilt, lift or fall off, thus ensuring the accuracy and reliability of the locking action.

[0025] Furthermore, a baffle 18 is fixedly provided on the side of the protrusion 12 away from the stop block 15, and the baffle 18 is used to prevent the slider 21 from moving to the left.

[0026] The baffle 18 limits the leftward movement of the slider 21, thus defining the "initial unlocked state" of the mechanism, preventing the slider 21 from sliding out of the design range during vibration and ensuring the determinism of the function.

[0027] Furthermore, a spring (14) is horizontally arranged inside the slide groove (13). One end of the spring (14) is fixedly connected to the inner side of the stop block (15), and the other end of the spring (14) away from the stop block (15) is fixedly connected to the side of the slide groove (13).

[0028] Spring 14 provides a constant restoring force to slider 21 toward the unlocked position. This ensures that the locking mechanism can automatically release when there is no pulling force, without affecting the normal insertion and removal of the terminals. At the same time, the elasticity of spring 14 also keeps the entire system in a pre-tensioned state, resulting in a faster response and eliminating abnormal noise caused by loosening of the mechanism.

[0029] Working principle: In the initial state without external force, the slider 21 is pushed to the leftmost side of the groove 13 under the elastic force of the spring 14. At this time, there is a certain gap between the right side wall of the second opening 23 on the slider 21 and the tail of the pin terminal 3, and the pin terminal 3 is in a freely movable, unlocked state. The elastic traction rope 24 is in a relaxed or slightly tensioned state.

[0030] When the terminal lead 4 is subjected to an unexpected outward pulling force, this force will be transmitted through the cable tray retainer 5 to the elastic traction rope 24 and elastic cable tie 6 that are fixedly connected to it.

[0031] As the tension increases, the elastic traction rope 24 and the elastic cable tie 6 are tightened, and the resulting tension will bypass the shaft 16 (which serves to guide and change the direction of the force) and instead apply a rightward tension to the slider 21.

[0032] Under the pull force to the right, the slider 21 overcomes the elastic force of the spring 14 and slides to the right within the groove 13. As the slider 21 moves to the right, its second opening 23 gradually approaches and allows the terminal lead 4 to enter its groove-shaped hole. Finally, the slider 21 tightly presses against the thicker part of the tail of the pin terminal 3. Since the width of the second opening 23 is smaller than the diameter of the tail of the pin terminal 3, the slider 21 acts like a movable "lock," firmly holding the pin terminal 3 in place and preventing it from being pulled backward.

[0033] The greater the external pulling force, the greater the tension transmitted to the elastic traction rope 24. At the same time, part of the force is borne by the terminal lead wire 4 and the pin terminal 3, causing the pin terminal 3 to have an outward displacement tendency. However, at this time, the slider 21 resists its displacement, so this tendency is converted into an outward pressure on the slider 21. Therefore, the pressure between the slider 21 and the protrusion 12 increases, and as the pressure increases, the friction also increases, forming a self-reinforcing locking mechanism.

[0034] The pulling force is mostly distributed by the elastic traction rope 24 and the elastic cable tie 6, and is transferred to and absorbed by the robust housing of the connector 1, rather than acting directly on the fragile terminal crimping points, thus protecting the integrity of the terminal connection.

[0035] When the external pulling force disappears, the compressed spring 14 releases its energy, pushing the slider 21 to the left to reset, releasing the lock on the pin terminal 3, and the entire mechanism returns to its initial state, making it convenient to replace and maintain the pin terminal 3.

[0036] The foregoing description enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A locking anti-pull structure for a vehicle lighting wiring harness connector, comprising a connector (1) and a fixing bracket (2). The connector (1) includes a connector body (11), the back of which is provided with a pair of protrusions (12) arranged one above the other. The gap between the protrusions (12) and the back of the connector body (11) forms a sliding groove (13). A sliding piece (21) is slidably connected in the sliding groove (13). The sliding piece (21) is provided with a first opening (22) and a second opening (23). The first opening (22) has a pin terminal (3) passing through it. The area of ​​the first opening (22) is larger than the cross-section of the pin terminal (3). The pin terminal (3) passes through the connector (1) and its tail is connected to a terminal lead wire (4). The second opening (23) is slot-shaped, and its width is greater than the diameter of the terminal lead wire (4) and smaller than the diameter of the pin terminal (3). The plurality of terminal leads (4) are bundled and fixed by a wire strip holder (5). The feature is that: One side of the slide (21) is fixedly connected to one end of the elastic traction rope (24). The protrusion (12) is fixedly provided with a pair of blocks (15) at the end of the side of the slide (21) connected to the elastic traction rope (24). A shaft (16) is fixedly provided on the opposite side of the blocks (15). The end of the elastic traction rope (24) away from the slide (21) passes around the shaft (16) and is fixedly connected to the cable tie (5).

2. The locking anti-pull structure for a vehicle headlight wiring harness connector according to claim 1, characterized in that: A pair of fixing ears (17) are fixedly provided on both sides of the plug-in body (11). The fixing ears (17) are fixedly connected to elastic cable ties (6). The other end of the elastic cable ties (6) is fixedly connected to the side of the cable tie fastener (5).

3. The locking anti-pull structure for a vehicle headlight wiring harness connector according to claim 2, characterized in that: The elastic traction rope (24) is fixedly connected to the inner side of the elastic cable tie (6) by a cable tie.

4. The locking anti-pull structure of a vehicle light wiring harness connector according to claim 1, characterized in that: The protrusion (12) is "L" shaped, and the slide (21) is slidably connected in the groove (13) formed by the protrusion (12) and the insertion body (11).

5. The locking anti-pull structure for a vehicle light wiring harness connector according to claim 1, characterized in that: A baffle (18) is fixedly provided on the side of the protrusion (12) away from the stop (15), and the baffle (18) is used to prevent the slider (21) from moving to the left.

6. The locking anti-pull structure for a vehicle light wiring harness connector according to claim 1, characterized in that: A spring (14) is horizontally arranged inside the slide groove (13). One end of the spring (14) is fixedly connected to the inside of the stop block (15), and the other end of the spring (14) away from the stop block (15) is fixedly connected to the side of the slide groove (13).

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