COB lamp strip

Abstract

The utility model relates to the technical field of lamp strips, in particular to a COB (chip on board) lamp strip, which is characterized in that heat transfer in the light emitting process of the lamp strip is blocked by arranging a thermal bimetallic strip, so that the lamp strip can be prevented from being separated from a mounting plane due to reduction of bonding capacity after a 3M double-sided adhesive tape is heated; meanwhile, after the temperature of the thermal bimetallic strip rises, the air flow between the light-emitting strip and the 3M double-faced adhesive tape can be improved, the heat dissipation capacity of the lamp strip can be improved, and it is ensured that the 3M double-faced adhesive tape stably plays a bonding role. Comprising a light-emitting strip, a mounting surface, a connecting surface and a thermal bimetallic strip, the light-emitting strip is arranged on the mounting surface in the length direction of the mounting surface, a 3M double-sided adhesive tape is arranged on the bottom surface of the connecting surface, the connecting surface is located below the mounting surface, the distance between the connecting surface and the mounting surface is variable, and the thermal bimetallic strip is located between the mounting surface and the connecting surface.

Description

Technical Field

[0001] The utility model relates to the field of light strips, in particular to a COB light strip. Background Art

[0002] LED strips are in the shape of strips that can emit light. They are also flexible and bendable and are widely used in the field of decoration. They can be divided into SMD strips and COB strips according to the packaging process.

[0003] Since the high-power chip packaging of COB light strips is concentrated in a small area, the heat generated during the operation of the light strip is concentrated in a small area, so the heat dissipation performance of the COB light strip is not good. The heat generated by the COB light strip will affect the bonding ability of the 3M double-sided tape on the bottom surface, causing the light strip to fall off the installation plane (the COB light strip with application number 202322306594.6 also mentioned this technical problem in the background technology). The purpose of this utility model is to propose a new light strip structure to solve the above technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a COB light strip to solve the problems mentioned in the background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: including a light strip, a mounting surface, a connecting surface and a thermal bimetallic strip, the light strip is arranged on the mounting surface along the length direction of the mounting surface, the bottom surface of the connecting surface is provided with 3M double-sided tape, the connecting surface is located below the mounting surface and the distance between the connecting surface and the mounting surface is variable, and the thermal bimetallic strip is located between the mounting surface and the connecting surface.

[0006] In order to optimize the above technical solution, further measures are taken as follows: limit strips are formed on the opposite surfaces of the mounting surface and the connecting surface respectively, and the limit strips are arranged on both sides of the mounting surface and the connecting surface. The cross-section of the limit strip is L-shaped, and the limit strips on the mounting surface and the connecting surface can cooperate with each other so that the distance between the connecting surface and the mounting surface can be variable.

[0007] As a further improvement to the above technical solution: elastic rubber strips are placed between the limit strips, the elastic rubber strips can be squeezed by the limit strips, and the elastic rubber strips can prevent the limit strips from being damaged during the change of the distance between the connection surface and the installation surface.

[0008] As a further improvement of the technical solution: a through hole for air circulation is formed on the side of the limiting strip located on the outside, and the heat exchange efficiency is further improved through air circulation to enhance the heat dissipation effect of the light strip.

[0009] As an improvement to the aforementioned technical solution: it also includes a column block, which is embedded in the bottom surface of the mounting surface and can roll to form a rotating pair with the mounting surface. The column block can contact the middle part of the bent thermal bimetallic strip. When the thermal bimetallic strip bends, the column block can press against the middle part of the thermal bimetallic block and roll, ensuring that the thermal bimetallic strip can stably contact the bottom surface of the mounting surface.

[0010] Furthermore: the column blocks are symmetrically arranged on both sides of the bottom surface of the installation surface, and the symmetrical design ensures that the column blocks can stably support the middle of the thermal bimetallic strip.

[0011] From the above description of the structure of the utility model, it can be seen that compared with the prior art, the utility model has the following advantages:

[0012] The utility model provides a COB light strip, which blocks the transfer of heat during the light-emitting process of the light strip by arranging a thermal bimetallic sheet, thereby preventing the light strip from being separated from the installation plane due to the decrease in the bonding ability of the 3M double-sided adhesive tape after being heated. At the same time, the air flow between the light strip and the 3M double-sided adhesive tape can be improved after the thermal bimetallic sheet is heated, thereby improving the heat dissipation capacity of the light strip and ensuring that the 3M double-sided adhesive tape can stably perform its bonding function. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 4 for Figure 3 Schematic diagram of local structure;

[0018] In the figure: light strip-1, mounting surface-2, connection surface-3, 3M double-sided tape-301, limit strip-302, elastic rubber strip-303, through hole-304, column block-305, thermal bimetallic strip-4, DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example

[0021] See also Figure 1-4 The utility model provides a COB light strip, including a light strip 1, a mounting surface 2, a connecting surface 3, a thermal bimetallic strip 4 and a column block 305. The light strip 1 is arranged on the mounting surface 2 along the length direction of the mounting surface 2.

[0022] A 3M double-sided tape 301 is provided on the bottom surface of the connecting surface 3. The connecting surface 3 is located below the mounting surface 2 and the distance between the connecting surface 3 and the mounting surface 2 is variable. Limiting strips 302 are formed on the opposite surfaces of the mounting surface 2 and the connecting surface 3 respectively. The limiting strips 302 are arranged on both sides of the mounting surface 2 and the connecting surface 3. The cross-section of the limiting strip 302 is L-shaped and the limiting strips 302 on the mounting surface 2 and the connecting surface 3 can cooperate with each other to realize the variable distance between the connecting surface 3 and the mounting surface 2. Elastic rubber strips 303 are placed between the limiting strips 302, and the elastic rubber strips 303 can be squeezed by the limiting strips 302. A through hole 304 for air circulation is formed on the side of the limiting strip 302 located on the outside.

[0023] The thermal bimetallic strip 4 is located between the mounting surface 2 and the connecting surface 3. The thermal bimetallic strip 4 is an existing material known to those skilled in the art. It is composed of two materials with different thermal expansion coefficients. In implementation, the side with a larger thermal expansion coefficient should be connected to the mounting surface. When the temperature rises, the thermal bimetallic strip 4 can produce reversible bending.

[0024] The column block 305 is embedded in the bottom surface of the mounting surface 2 and can roll to form a rotating pair with the mounting surface 2. The column block 305 is symmetrically arranged on both sides of the bottom surface of the mounting surface 2. The column block 305 can contact the middle part of the curved thermal bimetallic strip 4.

[0025] Working principle: A thermal bimetallic strip 4 is arranged between the light strip 1 and the 3M double-sided adhesive tape 301. The heat generated by the light strip 1 during the process of being powered on and emitting light will not be directly transferred to the 3M double-sided adhesive tape 301. The thermal bimetallic strip 4 accumulates the heat generated by the light strip 1 and its temperature will gradually increase and bend. The bent thermal bimetallic strip 4 will press against the mounting surface 2 and the connecting surface 3 to increase the gap between the mounting surface 2 and the connecting surface 3. During the process, the elastic rubber strip 303 will be compressed so that air can flow between the light strip 1 and the 3M double-sided adhesive tape 301 through the through hole 304, which helps to improve the heat dissipation of the light strip and avoid the light strip from being separated from the mounting plane due to the decrease in the bonding ability of the 3M double-sided adhesive tape 301 after being heated.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A COB light strip, wherein the features include: Light bar (1); A mounting surface (2), wherein the light strip (1) is arranged on the mounting surface (2) along the length direction of the mounting surface (2); A connecting surface (3), the bottom surface of which is provided with 3M double-sided adhesive tape (301), the connecting surface (3) being located below the mounting surface (2) and the distance between the connecting surface (3) and the mounting surface (2) being variable; A thermal bimetallic strip (4), the thermal bimetallic strip (4) is located between the mounting surface (2) and the connecting surface (3).

2. A COB light strip according to claim 1, characterized in that: The opposing surfaces of the mounting surface (2) and the connecting surface (3) respectively form limiting strips (302), the limiting strips (302) being arranged on both sides of the mounting surface (2) and the connecting surface (3), the limiting strips (302) having an L-shaped cross section, and the limiting strips (302) on the mounting surface (2) and the connecting surface (3) can cooperate with each other to realize a variable spacing between the connecting surface (3) and the mounting surface (2).

3. A COB light strip according to claim 2, characterized in that: An elastic rubber strip (303) is placed between the limiting strips (302), and the elastic rubber strip (303) can be squeezed by the limiting strips (302).

4. The COB light strip according to claim 2, characterized in that: A through hole (304) for air circulation is formed on the side of the limiting strip (302) located on the outside.

5. A COB light strip according to any one of claims 1 to 4, characterized in that: It also includes a column block (305), which is embedded in the bottom surface of the mounting surface (2) and can roll to form a rotating pair with the mounting surface (2). The column block (305) can contact the middle part of the bent thermal bimetallic strip (4).

6. The COB light strip according to claim 5, characterized in that: The column blocks (305) are symmetrically arranged on both sides of the bottom surface of the installation surface (2).

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