Copper wire rivet and copper wire riveting process for LED light bar

Abstract

The present application relates to the technical field of electricity, specifically refers to the copper rivet and riveting process for LED light bar. The copper rivet for LED light bar comprises a rivet cap, the bottom surface of the rivet cap has a rivet head which extends downward perpendicularly to the rivet cap, and the rivet head is a columnar structure; the middle section of the rivet head has a prefabricated part which has a reduced columnar surface diameter. The copper riveting process for LED light bar adopts the aforementioned copper rivet for LED light bar, and adopts the following steps: (1) prefabricating a conductive copper wire with an insulating outer skin along the length direction on the back surface of the substrate of the LED light bar; (2) driving the rivet into the front surface of the substrate of the LED light bar, so that the rivet head penetrates through the conductive copper wire on the back surface of the substrate; (3) axially stamping the rivet from the rivet cap, so that the rivet head generates stress deformation with the prefabricated part as the base point to form a riveting structure, thereby realizing the circuit connection of the conductive copper wire and the LED light bar.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, specifically to copper wire rivets and copper wire riveting processes used for LED light strips. Background Technology

[0002] LED light strips are a type of lighting product in the LED series. They use a long strip-shaped substrate, with high-brightness LEDs mounted on the front of the substrate as the light source. Typically, one or more LEDs form a circuit unit, which can be cut to the required length without damaging the circuit unit.

[0003] To connect circuit units on multiple LED light strips in series or in parallel, conductive copper wires are arranged on the back of the substrate to construct the series or parallel circuits. Rivets are also used to pierce the conductive copper wires from the circuit units on the front of the substrate to the back of the substrate. The rivets are then axially pressed to bend the rivet heads to form a riveting structure, so as to achieve electrical connection between the conductive copper wires and the circuit units.

[0004] The rivets used in existing technologies are mostly as follows Figure 1 As shown, the device has a nail head 1', and a nail head 2' extending downwards perpendicularly from the bottom surface of the nail head. The nail head 2' is a columnar structure with a uniform diameter throughout. The bending position of the nail head 2' under axial pressure is unpredictable. If the bending position of the nail head 2' is too close to the nail head 1', the riveting will be too tight, easily breaking the conductive copper wire and LED strip; if the bending position of the nail head 2' is too far from the nail head 1', the riveting will be too loose, easily causing poor conductivity. Summary of the Invention

[0005] To overcome the above-mentioned deficiencies of the prior art, the present invention provides a copper wire rivet for LED light strips, the technical solution of which is as follows.

[0006] Copper wire rivets for LED light strips include a rivet head, the bottom surface of which has a rivet head extending downward perpendicularly to the rivet head, the rivet head being a columnar structure; the middle section of the rivet head has a pre-formed part formed by reducing the diameter of the column.

[0007] When riveting the substrate and conductive copper wire of LED light strips, since the middle section of the nail head has a pre-formed part with a reduced cylindrical diameter, when the nail head is subjected to axial pressure, stress deformation will be generated with the pre-formed part as the base point, so that the final bending deformation position of the nail head is determined, and the riveting tightness that meets the design expectation is obtained.

[0008] Based on the above-mentioned inventive concept, the present invention also provides a copper wire riveting process for LED light strips, the technical solution of which is as follows.

[0009] The copper wire riveting process for LED light strips uses the aforementioned copper wire rivets for LED light strips, and follows these steps:

[0010] (1) Conductive copper wires with insulating outer sheaths are prefabricated on the back of the LED light strip substrate along the length direction.

[0011] (2) Drive the rivet into the front of the LED light strip substrate, so that the head of the rivet penetrates the conductive copper wire on the back of the substrate.

[0012] (3) The rivet is axially punched from the rivet head, so that the rivet head generates stress deformation with the prefabricated part as the base point to form a riveting structure, so as to realize the circuit connection between the conductive copper wire and the LED light strip.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] When riveting the substrate and conductive copper wire of LED light strips, since the middle section of the nail head has a pre-formed part with a reduced cylindrical diameter, when the nail head is subjected to axial pressure, stress deformation will be generated with the pre-formed part as the base point, so that the final bending deformation position of the nail head is determined, and the riveting tightness that meets the design expectation is obtained.

[0015] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of rivets used in existing technology.

[0017] Figure 2 This is a schematic diagram of the structure of the present invention.

[0018] Figure 3 This is a diagram showing the usage state of the present invention.

[0019] Figure 4 This is a schematic diagram illustrating the working principle of the present invention. Detailed Implementation

[0020] The copper wire rivets for LED light strips provided by this invention, such as Figure 2 and Figure 3 As shown, it includes a nail head 1, the bottom surface of which has a nail head 2 extending downward perpendicularly to the nail head 1, the nail head 2 having a columnar structure; the middle section of the nail head 2 has a prefabricated part 21 formed by reducing the diameter of the column.

[0021] In the most basic implementation, the prefabricated part 21 as expected in the above scheme can be obtained simply by stamping the middle section of the nail head 2.

[0022] When the copper wire rivet for LED light strip provided in the above scheme is used to rivet the substrate and conductive copper wire of LED light strip, since the middle section of the rivet head 2 has a preformed part 21 with a reduced cylindrical diameter, when the rivet head 2 is subjected to axial punching, stress deformation will be generated with the preformed part 21 as the base point, so that the final bending deformation position of the rivet head 2 is determined, and the riveting tightness that meets the design expectation is obtained.

[0023] As an improvement to the aforementioned technical solution, taking the prefabricated part 21 as the boundary, the upper section of the nail head 2 is a cylindrical structure with the same overall diameter, and the lower section of the nail head 2 is also a cylindrical structure with the same overall diameter, but the diameter of the lower section of the nail head 2 is smaller than that of the upper section. In this improved solution, the nail head 2 as a whole remains a rotating body with the same central axis, which can better support the nail head 2 in penetrating the LED light strip and conductive copper wire, and will not bend or deform prematurely during the penetration process. Furthermore, the lower section of the nail head 2 mainly bears the bending deformation to complete the riveting function, and using a smaller diameter can avoid physical damage to the conductive copper wire.

[0024] As a further improvement to the above technical solution, the prefabricated part 21 is frustoconical, with the diameter of its upper end being the same as that of the upper section of the nail head 2, and the diameter of its lower end being the same as that of the lower section of the nail head 2. The significance of this improvement is that the frustoconical structure of the prefabricated part 21 further limits the base point of stress deformation of the nail head 2 under axial pressing to the lower end of the prefabricated part 21, thereby enhancing fault tolerance.

[0025] In a preferred embodiment, the end of the nail head 2 is shaped into a cone to facilitate puncture.

[0026] The copper wire riveting process for LED light strips provided by this invention uses the aforementioned copper wire rivets for LED light strips as rivets, and employs the following steps:

[0027] (1) Conductive copper wire 4 with an insulating outer sheath is prefabricated on the back of the substrate 3 of the LED light strip along the length direction.

[0028] (2) Drive the rivet into the front of the LED light strip substrate 3 so that the rivet head 2 penetrates the conductive copper wire 4 to the back of the substrate 3.

[0029] (3) The rivet is axially punched from the rivet head 1, so that the rivet head 2 generates stress deformation with the prefabricated part 21 as the base point to form a riveting structure, so as to realize the circuit connection between the conductive copper wire 4 and the LED light strip.

[0030] like Figure 4 As shown, in order to facilitate stamping, in step (3), a lower die 5 is provided to cooperate with stamping. The lower die 5 is fitted to the back of the substrate 3 of the LED light strip to support the conductive copper wire 4 and the LED light strip, and a groove 51 is provided on the support surface of the lower die 5 to avoid the conductive copper wire 3.

[0031] Based on this, in order to reduce the physical damage to the conductive copper wire 4 after the rivet head 2 is bent, the cross-section of the groove 51 along its length is arc-shaped, causing the rivet head 2 to produce a shape similar to... Figure 4 The hook 22 on the back of the substrate shown, which is used in conjunction with the LED light strip, can both tighten the conductive copper wire 4 and reduce the pressure on the conductive copper wire 4.

[0032] In order to facilitate the arrangement of conductive copper wires 4, in step (1), the insulating outer sheath of conductive copper wires 4 is bonded to the back of the substrate 3 of the LED light strip.

[0033] For those skilled in the art, the scope of protection of this invention is not limited to the details of the above exemplary embodiments. Without departing from the spirit or essential characteristics of this invention, all equivalent and varied implementations made by those skilled in the art based on the elements of this invention should be included within this invention.

Claims

1. A copper wire rivet for LED light strips, comprising a rivet head, the bottom surface of which has a rivet head extending downward perpendicularly to the rivet head, the rivet head being a columnar structure; characterized in that: The middle section of the nail head has a prefabricated part formed by reducing the diameter of the cylindrical surface; with the prefabricated part as the boundary, the upper section of the nail head is a cylindrical structure with the same overall diameter, and the lower section of the nail head is also a cylindrical structure with the same overall diameter, and the diameter of the lower section of the nail head is smaller than the diameter of the upper section of the nail head; the prefabricated part is frustoconical, and the diameter of its upper end is the same as the diameter of the upper section of the nail head, and the diameter of its lower end is the same as the diameter of the lower section of the nail head. Conductive copper wires with insulating outer sheaths are prefabricated along the length of the back of the LED light strip substrate. A rivet is driven into the front of the LED light strip substrate, so that the rivet head penetrates the conductive copper wires to the back of the substrate. The rivet head is axially pressed, causing the rivet head to deform under stress with the prefabricated part as the base point, thus forming a riveting structure to achieve the circuit connection between the conductive copper wires and the LED light strip. A lower die is also provided to cooperate with the stamping. The lower die fits into the back of the LED light strip substrate to support the conductive copper wires and the LED light strip, and a groove is provided on the support surface of the lower die to avoid the conductive copper wires.

2. The copper wire rivet for LED light strips as described in claim 1, characterized in that: The end of the nail head is shaped into a cone to facilitate puncture.

3. The copper wire rivet for LED light strips as described in claim 1, characterized in that: The cross-section of the groove along its length is arc-shaped.

4. The copper wire rivet for LED light strips as described in claim 1, characterized in that: The insulating outer sheath of the conductive copper wire is bonded to the back of the LED light strip substrate.

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