Wire anti-drop fixing structure and vehicle lamp thereof

Abstract

The utility model discloses a lead anti-drop fixing structure and an automobile lamp thereof, and aims to overcome the defect that a wire harness on a PCB (printed circuit board) of an existing automobile is pulled and is easy to break during running of the automobile. The PCB comprises a positioning hole, a plurality of separating leads and a protective ring, the positioning hole is arranged on the PCB, a plurality of welding spots are arranged on the top surface of the PCB, one end of each separating lead is fixedly connected with the welding spots on the PCB, the separating leads are gathered and penetrate through the positioning hole to extend below the bottom surface of the PCB, and the protective ring is sleeved on a hole channel of the positioning hole. The separated wire harnesses are positioned through the positioning holes, vibration kinetic energy is absorbed through the adjacent separated wire harnesses and the protection rings, and the reliability of the separated wire harnesses is improved.

Description

Technical Field

[0001] The utility model relates to the field of vehicle lighting, and more specifically, to a wire anti - detachment fixing structure and a vehicle lamp thereof. Background Technique

[0002] A printed circuit board (PCB) is a support for electronic components, providing a carrier for electrical connections between electronic components. With the development of electronic technology, the application of PCB boards is becoming more and more extensive, and its manufacturing technology has also received increasing attention. At the same time, the fixing structure of electronic components has also become an important part of the design and manufacture of electronic products. The field of mechanical design and manufacture mainly studies the technologies and methods in aspects such as the design, manufacture, operation, and maintenance of mechanical systems.

[0003] In the publicly recorded vehicle lamps, there are records of using LED lamps as lighting sources. Among them, LED lamps have the advantages of high luminous efficiency, small volume, and fast startup speed.

[0004] LED lamp beads are arranged on the PCB board and are powered by the copper plating on the PCB board. The PCB board is also connected to a power source and an external controller through a wire harness. Since it is installed on a vehicle, the PCB board will vibrate, causing the wire harness connected to the PCB board to be pulled. Further, when the wire harness resonates with the vehicle body, its vibration amplitude will increase sharply. When it exceeds the tensile strength of the wire, the wire will break and fall off at the solder joint. Summary of the Invention

[0005] The utility model overcomes the deficiency that the wire harness on the PCB board of a current vehicle is easily pulled and broken during vehicle driving, and provides a wire anti - detachment fixing structure and a vehicle lamp thereof, which can improve the fixing property.

[0006] To solve the above - mentioned technical problems, the utility model adopts the following technical solutions:

[0007] A wire anti - detachment fixing structure includes positioning holes, a plurality of separated wires, and a protective ring arranged on the PCB board. A plurality of solder joints are provided on the top surface of the PCB board. One end of each separated wire is fixedly connected to the solder joints on the PCB board. Each separated wire converges and passes through the positioning hole and extends below the bottom surface of the PCB board. The protective ring is sleeved on the hole channel of the positioning hole.

[0008] The positioning holes are used to pass through separated wire harnesses, and after gathering them together, they are uniformly passed through the positioning holes. The positioning holes are columnar holes opened on the PCB board and communicating from the top surface to the bottom surface. When the separated wires gathered through the positioning holes are pulled during vibration, the stressed end of the wire is no longer at the solder joint position but at the positioning hole position. In order to prevent the insulation skin of the separated wire harness from being cut by the orifice of the PCB board, a protective ring is provided on the pore passage of the positioning hole.

[0009] When multiple separated wire harnesses positioned by the positioning holes vibrate, vibration occurs between adjacent separated wire harnesses, thereby dissipating kinetic energy and improving the reliability of the wires.

[0010] Preferably, the protective ring is made of a flexible material. The insulation skin of the separated wire harness is protected by the vibration of the flexible protective ring.

[0011] Preferably, the thickness of the protective ring is twice the depth of the pore passage of the positioning hole, generating sufficient deformation margin, and using the elasticity of the protective ring as damping to absorb the vibration of the separated wire harness.

[0012] Preferably, the protective ring includes an upper crown, a middle sleeve, and a lower crown. The upper crown and the lower crown are symmetric with respect to the middle sleeve. The upper crown is smaller at the top and larger at the bottom. The smallest part of the upper crown is smaller than the aperture of the positioning hole, and the largest part of the upper crown is larger than the aperture of the positioning hole. The upper crown and the middle sleeve are transitioned by a step, and the outer side wall of the middle sleeve fits the side wall of the positioning hole. The protective ring is symmetric up and down, which is easy to install. The upper crown is smaller at the top and larger at the bottom, which is easy to introduce. After introduction, it is clamped and is not easy to fall off.

[0013] Preferably, the hardness of the protective ring is 30 - 50 degrees, and the elastic modulus is 3 - 5 MPa.

[0014] Preferably, each solder joint is fitted with a virtual ring, and the positioning hole is concentric with the virtual ring. The position of the positioning hole is set so as to evenly distribute the force as much as possible, avoiding excessive attraction of individual separated wire harnesses due to the position of the positioning hole.

[0015] A vehicle lamp includes a wire anti - detachment and fixing structure as described above.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] (1) The separated wire harnesses are concentratedly passed through the positioning holes, improving the situation of wire harness scattering;

[0018] (2) The separated wire harnesses are positioned through the positioning holes, and the kinetic energy of vibration is absorbed by adjacent separated wire harnesses and the protective ring, improving the reliability of the separated wire harnesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an isometric view of the present utility model;

[0020] Figure 2 is the top view of the present utility model;

[0021] Figure 3 is the schematic diagram of the protective ring of the present utility model;

[0022] In the figure:

[0023] positioning hole 1, PCB board 2, separated wire 3, protective ring 4, upper crown 5, middle sleeve 6, lower crown 7, virtual ring 8. Specific embodiments

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

[0025] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Embodiment:

[0028] A wire anti-disconnection and fixing structure, referring to Figure 1 as shown, includes a positioning hole 1, a plurality of separated wires 3 and a protective ring 4 provided on the PCB board 2.

[0029] The PCB board 2 has LED lamp beads and electrical components surrounding the LED lamp beads, as well as packaging circuits for power supply and control.

[0030] The separated wire 3 is a multi-strand wire harness in a separated state. The separated wire 3 includes a linear conductor for carrying electric energy and transmitting electrical signals and an insulating skin wrapping the linear conductor. A plurality of solder joints are provided on the top surface of the PCB board 2. One end of the separated wire 3 is fixedly connected to the solder joints on the PCB board 2, and the other end is connected to a controller or a power source.

[0031] The PCB board 2 is provided with positioning holes 1. The positioning holes 1 are through holes passing through the top surface and the bottom surface of the PCB board 2. The axis of the positioning hole 1 is parallel to the normal line of the top surface of the PCB board 2. The cross-sections of the positioning holes 1 are of the same size everywhere. In some embodiments, the orifice of the positioning hole 1 is provided with a chamfer, and the chamfer is an inclined chamfer, but it is not limited thereto. Each of the separated wires 3 converges and passes through the positioning hole 1 and extends below the bottom surface of the PCB board 2.

[0032] As shown Figure 3 in the figure, the protective ring 4 is sleeved on the hole channel of the positioning hole 1. The protective ring 4 is made of a flexible material. By vibrating the flexible protective ring 4, the insulating skin of the separated wire harness is protected. The thickness of the protective ring 4 is twice the depth of the hole channel of the positioning hole 1, generating sufficient deformation margin. Using the elasticity of the protective ring 4 as damping, the vibration of the separated wire harness is absorbed. The protective ring 4 includes an upper crown 5, a middle sleeve 6 and a lower crown 7. The upper crown 5 and the lower crown 7 are symmetric with respect to the middle sleeve 6. The upper crown 5 is smaller at the top and larger at the bottom. The smallest part of the upper crown 5 is smaller than the aperture of the positioning hole 1, and the largest part of the upper crown 5 is larger than the aperture of the positioning hole 1. The upper crown 5 and the middle sleeve 6 are transitioned by a step. The outer side wall of the middle sleeve 6 fits the side wall of the positioning hole 1. The protective ring 4 is symmetric up and down, which is easy to install. The upper crown 5 is smaller at the top and larger at the bottom, which is easy to introduce. After the introduction is completed, it is clamped and is not easy to fall off. The shape of the upper crown 5 adapts to the shape of the positioning hole 1. In this embodiment, the positioning hole 1 is an oval hole. The top and bottom of the upper crown 5 are also in a similar runway shape, and the waist line between the top and the top is a straight line. In some embodiments, the top of the upper crown 5 also has a rounded corner to improve the introduction performance. The hardness of the protective ring 4 is 30-50 degrees, and the elastic modulus is 3-5 MPa.

[0033] As shown Figure 2 in the figure, each solder joint is fitted with a virtual ring 8, and the positioning hole 1 is concentric with the virtual ring 8. The position of the positioning hole 1 is set so as to evenly distribute the force as much as possible, avoiding excessive attraction of individual separated wire harnesses due to the position of the positioning hole 1. The shape of the virtual ring 8 is similar to the cross-sectional shape of the positioning hole 1, and the two are enlarged in proportion with respect to the center position of the positioning hole 1.

[0034] The positioning hole 1 is used to pass through the separated wire harnesses. After converging them, they are uniformly passed through the positioning hole 1. The positioning hole 1 is a columnar hole opened on the PCB board 2 and communicating from the top surface to the bottom surface. When the separated wires 3 in the state of being uniformly converged and passing through the positioning hole 1 are pulled when vibrating, the stressed end of the wire does not occur at the solder joint position, but at the positioning hole 1 position. In order to prevent the insulating skin of the separated wire harness from being cut by the orifice of the PCB board 2, a protective ring 4 is provided on the hole channel of the positioning hole 1.

[0035] When multiple separated wire harnesses simultaneously positioned by the positioning hole 1 vibrate, the adjacent separated wire harnesses vibrate with each other, thereby dissipating kinetic energy and improving the reliability of the wires.

[0036] During assembly, first pass multiple wires through the protective ring 4, and then weld each wire 3 to the PCB board 2. Since the bending radius of the wire 3 required for welding is relatively large, after welding, then slip the protective ring 4 over the positioning hole 1, and then pull back all the welded wires 3. If there is no protective ring 4, the wire 3 will be cut by the sharp PCB board 2.

[0037] A vehicle lamp includes a wire anti-disengagement fixing structure as described above.

[0038] The above-described embodiments are only preferred solutions of the present invention and do not impose any form of limitation on the present invention. There are other variations and modifications without exceeding the technical solutions recited in the claims.

Claims

1. A wire anti - detachment fixing structure, characterized in that, It includes positioning holes, several separate wires and protective rings arranged on a PCB board. There are several solder joints on the top surface of the PCB board. One end of each separate wire is fixedly connected to the solder joints on the PCB board. Each separate wire converges and passes through the positioning hole and extends below the bottom surface of the PCB board. The protective ring is sleeved on the hole channel of the positioning hole.

2. The wire anti-disconnection fixing structure of a PCB board according to claim 1, characterized in that, The protective ring is made of a flexible material.

3. The wire anti - detachment and fixing structure of a PCB board according to claim 1, characterized in that, The thickness of the protective ring is twice the depth of the hole channel of the positioning hole.

4. A wire anti - detachment fixing structure of a PCB board according to claim 2, characterized in that, The protective ring includes an upper crown, a middle sleeve and a lower crown. The upper crown and the lower crown are symmetric with respect to the middle sleeve. The upper crown is small at the top and large at the bottom. The smallest part of the upper crown is smaller than the aperture of the positioning hole, and the largest part of the upper crown is larger than the aperture of the positioning hole. The upper crown and the middle sleeve are transitioned by a step. The outer side wall of the middle sleeve fits the side wall of the positioning hole.

5. A wire anti - detachment fixing structure for a PCB board according to claim 2, characterized in that, The hardness of the protective ring is 30 - 50 degrees, and the elastic modulus is 3 - 5 MPa.

6. A wire anti - detachment fixing structure for a PCB board according to claim 1, characterized in that, Each solder joint is fitted with a virtual ring, and the positioning hole is concentric with the virtual ring.

7. A vehicle lamp, characterized in that, It includes a wire anti - detachment and fixing structure according to any one of claims 1 to 6.

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