Backlight module convenient for mounting PCB (Printed Circuit Board)

Abstract

The utility model discloses a backlight module convenient for mounting a PCB (Printed Circuit Board), which relates to the field of backlight modules and comprises the PCB and an iron frame, the iron frame is provided with a positioning slot, the PCB is provided with a through hole, one end of a positioning column is provided with a deformation part, after the positioning column penetrates through the through hole, the deformation part is clamped with the positioning slot, and the PCB is fixed on the iron frame; according to the utility model, the deformation part is arranged on the positioning column, and the positioning column is pressed to pass through the through hole, so that the deformation part is contracted and then inserted into the positioning slot of the iron frame, and the deformation part restores to be clamped with the positioning slot when no external force exists, so that the PCB is fixed on the iron frame, the use and attachment processes of the double-sided adhesive tape are reduced, the installation and fixation are convenient, and the production efficiency is high; and the positioning columns penetrate through the PCB to be connected with the iron frame, so that the PCB can be quickly positioned and mounted, the mounting precision of the PCB is improved, and the product quality of the backlight module is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of backlight modules, in particular to a backlight module which is convenient for installing a PCB board. Background Art

[0002] Liquid crystal display technology is developing rapidly, and there are more and more manufacturers. The cost of modules has become the survival basis of each manufacturer. Minimizing the cost of backlight modules is not only a guarantee of manufacturers' profits, but also a necessary prerequisite for winning every order. Liquid crystal display technology is widely used, not only in electronic equipment, but also in car central control. In the existing display modules, the main screen PCB board is fixed by double-sided adhesive and the backlight rear iron frame. For example, patent application number 201910842662.6 discloses a backlight module, which fixes the PCB board on the back of the backlight module by setting a whole adhesive layer; the PCB board and the backlight module are electrically connected through a metal sheet to guide the static electricity in the PCB board; the expensive problem of pasting multiple double-sided adhesives and conductive structures in the process of pasting the PCB board to the backlight module is avoided, thereby reducing the cost of the backlight module; patent application number 202220233741.4 discloses a double-sided adhesive and a backlight module, the double-sided adhesive includes a supporting part and a reinforcing part; the supporting part is in the shape of a long strip, and its length direction is the same as the length direction of the PCB board, and is used to support and fix the PCB board; the reinforcing part is arranged on both sides of the supporting part along the length direction of the supporting part, and the reinforcing part is in a continuous concave-convex shape, which is used to reduce the double-sided contact area, so as to provide the PCB board with appropriate adhesion, so as to facilitate the backlight module to be returned to the factory for repair. Patent application No. 202320333057.8 discloses a PCB board with conductive double-sided adhesive and positioning holes, including a PCB board body and components, the PCB board body includes a substrate FR4, a first copper trace, a first green ink, white ink, a second copper trace and a second green ink, the upper and lower surfaces of the substrate FR4 are respectively arranged with the second copper trace and the first copper trace, the upper and lower surfaces of the substrate FR4 are respectively covered with a layer of the second green ink located on the upper surface of the second copper trace and the first green ink located on the lower surface of the first copper trace, the lower surface of the first green oil is covered with a layer of white ink, and the upper surface of the PCB board body is provided with components. The conductive double-sided adhesive body is attached to the first copper trace and the second copper trace on the substrate FR4, and the adhesion effect is good due to the lack of the height difference between the first green oil and the second green oil. The conductive double-sided adhesive body bent to the lower surface of the PCB board body can be adhered to the backlight iron frame, so that the copper skin of the PCB board body can have a good conductive effect with the backlight iron frame through the conductive double-sided adhesive body. In the above structure, the backlight module and the PCB board are both fixed by double-sided adhesive bonding, which requires the addition of a double-sided adhesive process during the production process, which not only increases labor costs, but also reduces production efficiency. At the same time, the double-sided adhesive bonding is also prone to deviation, affecting product quality. Therefore, the utility model discloses a backlight module that is easy to install a PCB board to solve the above problems. Utility Model Content

[0003] Based on this, it is necessary to provide a backlight module that is easy to install a PCB board in response to the above-mentioned technical problems. A deformation part is set on the positioning column, and the positioning column is pressed through the through hole so that the deformation part shrinks and is inserted into the positioning slot of the iron frame. When there is no external force, the deformation part returns to its original state and is engaged with the positioning slot, thereby fixing the PCB board on the iron frame, reducing the use of double-sided adhesive and the attachment process, making installation and fixing convenient, with high production efficiency and reduced production costs. The positioning column passes through the PCB board and is connected to the iron frame, so that the PCB board can be quickly positioned and installed, thereby improving the installation accuracy of the PCB board and thereby improving the product quality of the backlight module.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A backlight module for facilitating installation of a PCB board comprises a PCB board and an iron frame, wherein the iron frame is provided with a positioning slot, the PCB board is provided with a through hole and a positioning column, one end of the positioning column is provided with a deformation portion, after the positioning column passes through the through hole, the deformation portion is engaged with the positioning slot, and the PCB board is fixed on the iron frame.

[0006] As a preferred embodiment of the backlight module for PCB board installation provided by the utility model, the PCB board includes a substrate, a first copper wire layer, a second copper wire layer, a first green oil layer and a second green oil layer, the first copper wire layer and the second copper wire layer are respectively arranged on the upper and lower surfaces of the substrate, the first green oil layer covers the surface of the first copper wire layer, and the second green oil layer covers the surface of the second copper wire layer.

[0007] As a preferred embodiment of the backlight module for PCB board installation provided by the utility model, a surface of the PCB board is located around the through hole and a copper leakage area is formed on the inner wall of the through hole, and the positioning column is in contact with the copper leakage area.

[0008] As a preferred implementation of the backlight module for PCB board installation provided by the utility model, the number of through holes is four and they are distributed in a matrix.

[0009] As a preferred implementation of the backlight module for facilitating installation of a PCB board provided by the utility model, the positioning slot is a T-shaped slot.

[0010] As a preferred implementation of the backlight module for PCB board installation provided by the utility model, the deformation portion is a conical structure.

[0011] As a preferred implementation of the backlight module for facilitating installation of a PCB board provided by the utility model, a deformation cavity is provided inside the deformation portion.

[0012] As a preferred implementation of the backlight module for PCB board installation provided by the utility model, the material of the deformation part is rubber.

[0013] As a preferred embodiment of the backlight module for PCB board installation provided by the utility model, an end of the positioning column away from the deformation portion is provided with an integral cover cap, and a surface of the cover cap is provided with an anti-slip layer.

[0014] As a preferred implementation of the backlight module for PCB board installation provided by the utility model, the positioning column and the cover cap are both made of conductive metal material.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model provides a backlight module that is convenient for installing a PCB board. A deformation part is arranged on the positioning column. The positioning column is pressed through the through hole so that the deformation part is contracted and inserted into the positioning slot of the iron frame. When there is no external force, the deformation part returns to its original state and is engaged with the positioning slot, thereby fixing the PCB board on the iron frame, reducing the use of double-sided adhesive and the attachment process, making installation and fixing convenient, and having high production efficiency and reducing production costs. The positioning column passes through the PCB board and is connected to the iron frame, so that the PCB board can be quickly positioned and installed, thereby improving the installation accuracy of the PCB board and thereby improving the product quality of the backlight module.

[0017] 2. The utility model provides a backlight module that is easy to install a PCB board. A copper leakage area is set at the through hole of the PCB board. After the positioning column made of conductive metal material passes through the PCB board and is connected to the iron frame, the PCB board and the iron frame are electrically connected, thereby ensuring the conductive effect of the PCB board and the iron frame, and being able to stably conduct static electricity in the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic cross-sectional view of the overall structure of a backlight module provided by the utility model that is convenient for installing a PCB board;

[0020] Figure 2 A schematic cross-sectional view of an iron frame structure of a backlight module provided by the utility model for facilitating installation of a PCB board;

[0021] Figure 3A schematic diagram of a plane after the PCB board and the iron frame are attached to each other in a backlight module that is convenient for installing the PCB board provided by the utility model;

[0022] Figure 4 A schematic cross-sectional view of a PCB board of a backlight module provided by the utility model for easy installation of the PCB board;

[0023] Figure 5 A schematic diagram of the positioning column structure of the backlight module provided by the utility model for facilitating the installation of a PCB board;

[0024] Figure 6 The utility model provides a schematic diagram of the cross-sectional structure of the positioning column of the backlight module which is convenient for installing the PCB board.

[0025] The markings in the figure are as follows:

[0026] 1. PCB board; 2. Iron frame; 3. Positioning slot; 4. Through hole; 5. Positioning column; 6. Deformation part; 7. Base plate; 8. First copper wire layer; 9. Second copper wire layer; 10. First green oil layer; 11. Second green oil layer; 12. Copper leakage area; 13. Cap; 14. Deformation cavity. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0028] As described in the background technology, the backlight module and the PCB board are both fixed by double-sided bonding, and a double-sided adhesive process needs to be added during the production process, which not only increases labor costs, but also reduces production efficiency. At the same time, the double-sided adhesive is prone to deviation during bonding, affecting product quality.

[0029] In order to solve this technical problem, the utility model provides a backlight module which is convenient for installing a PCB board, and is applied in the field of backlight modules.

[0030] Specifically, please refer to Figure 1-5 The backlight module that is convenient for installing the PCB board 1 includes a PCB board 1 and an iron frame 2. The iron frame 2 is provided with a positioning slot 3. The PCB board 1 is provided with a through hole 4 and a positioning column 5. One end of the positioning column 5 is provided with a deformation part 6. After the positioning column 5 passes through the through hole 4, the deformation part 6 is engaged with the positioning slot 3 to fix the PCB board 1 on the iron frame 2.

[0031] The utility model provides a backlight module which is convenient for installing a PCB board 1. A deformation part 6 is arranged on the positioning column 5. The positioning column 5 is pressed through the through hole 4 so that the deformation part 6 is contracted and inserted into the positioning slot 3 of the iron frame 2. When there is no external force, the deformation part 6 returns to its original state and is engaged with the positioning slot 3, thereby fixing the PCB board 1 on the iron frame 2, reducing the use of double-sided adhesive and the attachment process, making installation and fixing convenient, and having high production efficiency, thereby reducing production costs. Moreover, the positioning column 5 passes through the PCB board 1 and is connected with the iron frame 2, so that the PCB board 1 can be quickly positioned and installed, thereby improving the installation accuracy of the PCB board 1, thereby improving the product quality of the backlight module.

[0032] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] Please refer to Figure 1-5 , a backlight module for facilitating installation of a PCB board 1 is provided, which comprises a PCB board 1 and an iron frame 2, the iron frame 2 being the rear iron frame of the backlight module, a positioning slot 3 being arranged on the iron frame 2, a through hole 4 being arranged on the PCB board 1, the through hole 4 being arranged corresponding to the positioning slot 3, the PCB board 1 being connected to the iron frame 2 via a positioning column 5 passing through the through hole 4, specifically, a deformation portion 6 is arranged at one end of the positioning column 5, after the positioning column 5 passes through the through hole 4, the deformation portion 6 is engaged with the positioning slot 3, and the PCB board 1 is fixed on the iron frame 2, and the PCB board 1 can be fixed on the backlight module without using double-sided adhesive, which not only saves the double-sided adhesive attachment process, but also reduces the use cost of double-sided adhesive, and only the structure of the positioning column 5 is changed, which facilitates the disassembly and maintenance of the PCB board 1, and also avoids double-sided adhesive leaving residual adhesive on the PCB board 1 and the backlight module.

[0036] like Figure 4 As shown, the PCB board 1 includes a substrate 7, a first copper wire layer 8, a second copper wire layer 9, a first green oil layer 10 and a second green oil layer 11. The first copper wire layer 8 and the second copper wire layer 9 are respectively arranged on the upper and lower surfaces of the substrate 7. The first green oil layer 10 covers the surface of the first copper wire layer 8, and the second green oil layer 11 covers the surface of the second copper wire layer 9. The first copper wire layer 8 and the second copper wire layer 9 are both copper traces to form a circuit, and components are installed on the circuit for electrical connection. At the same time, the first green oil layer 10 and the second green oil layer 11 play an insulating role.

[0037] In this example, four through holes 4 are provided and distributed in a matrix, and the PCB board 1 is fixed at four corners, which can ensure the fixing stability of the PCB board 1.

[0038] The backlight module provided in Example 1 for facilitating installation of the PCB board 1 is further optimized. Specifically, Figure 1-4 As shown, a copper leakage area 12 is formed on one surface of the PCB board 1 around the through hole 4 and on the inner wall of the through hole 4, and the positioning column 5 is in contact with the copper leakage area 12. The copper leakage area 12 can expose the copper wiring. After the positioning column 5 passes through the through hole 4, the copper wiring contacts the positioning column 5, and the static electricity of the PCB board 1 is introduced into the iron frame 2. Furthermore, a cap 13 connected as an integral whole is provided at one end of the positioning column 5 away from the deformation portion 6. The positioning column 5 and the cap 13 are both made of conductive metal. After the positioning column 5 is pressed and fixed, the cap 13 can also electrically contact the copper leakage area 12, thereby enhancing the conductivity of the PCB board 1 and the iron frame 2, and the surface of the cap 13 is provided with an anti-slip layer, and the upper surface of the cap 13 is roughened to form an anti-slip layer, thereby increasing friction and preventing the positioning column 5 from slipping when it is manually pressed.

[0039] The backlight module provided in Example 2 for facilitating installation of the PCB board 1 is further optimized. Specifically, Figure 1 , 2 As shown in Figures 5 and 6, the positioning slot 3 is a T-slot, and the matching deformation part 6 is a conical structure. The large surface of the deformation part 6 is fixedly connected to the positioning column 5 and the large surface area of ​​the deformation part 6 is larger than the area of ​​the positioning column 5, so that a step structure is formed between the deformation part 6 and the positioning column 5. After the deformation part 6 is inserted into the T-slot, it is deformed. After returning to its original state, the large surface of the deformation part 6 abuts against the T-slot, thereby clamping and fixing the positioning column 5 on the iron frame 2. The height of the deformation part 6 is greater than the lateral depth of the positioning slot 3. Furthermore, a deformation cavity 14 is provided inside the deformation part 6 to facilitate deformation of the deformation part 6. The deformation part 6 can be made of rubber material, specifically hard rubber, which can prevent the positioning column 5 from falling off from the positioning slot 3 by itself.

[0040] The working principle of the backlight module for facilitating the installation of the PCB board 1 provided by the utility model is as follows: the PCB board 1 is attached to the iron frame 2 of the backlight module, and then the positioning column 5 is pressed so that the deformation part 6 of the positioning column 5 is inserted into the positioning slot 3 of the iron frame 2. After the positioning column 5 is released, the deformation part 6 returns to its original state, so that the deformation part 6 is engaged with the positioning slot 3, thereby fixing the PCB board 1 on the iron frame 2. The positioning column 5 is made of conductive metal material, and the positioning column 5 is attached to the exposed copper leakage area 12 on the PCB board 1, thereby introducing static electricity into the iron frame 2, thereby avoiding static electricity on the PCB board 1, reducing the use of double-sided adhesive and the attachment process, and making installation and fixing convenient, with high production efficiency and reduced production cost. The positioning column 5 passes through the PCB board 1 and is connected to the iron frame 2, so that the PCB board 1 can be quickly positioned and installed, thereby improving the installation accuracy of the PCB board 1 and thereby improving the product quality of the backlight module.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A backlight module for facilitating installation of a PCB board, comprising a PCB board and an iron frame, characterized in that: The iron frame is provided with a positioning slot, the PCB board is provided with a through hole and a positioning column, one end of the positioning column is provided with a deformation part, after the positioning column passes through the through hole, the deformation part is engaged with the positioning slot, and the PCB board is fixed on the iron frame.

2. A backlight module for facilitating installation of a PCB board according to claim 1, characterized in that: The PCB board includes a substrate, a first copper wire layer, a second copper wire layer, a first green oil layer and a second green oil layer, wherein the first copper wire layer and the second copper wire layer are respectively arranged on the upper and lower surfaces of the substrate, the first green oil layer covers the surface of the first copper wire layer, and the second green oil layer covers the surface of the second copper wire layer.

3. A backlight module for facilitating installation of a PCB board according to claim 2, characterized in that: A copper leakage area is formed on one surface of the PCB board around the through hole and on the inner wall of the through hole, and the positioning column is in contact with the copper leakage area.

4. A backlight module for facilitating installation of a PCB board according to claim 3, characterized in that: An end of the positioning column away from the deformation portion is provided with an integral cover cap, and a surface of the cover cap is provided with an anti-slip layer.

5. A backlight module for facilitating installation of a PCB board according to claim 4, characterized in that: The positioning column and the cap are both made of conductive metal.

6. The backlight module for facilitating installation of a PCB board according to claim 1, characterized in that: The number of the through holes is four and they are distributed in a matrix.

7. The backlight module for facilitating installation of a PCB board according to claim 1, characterized in that: The positioning slot is a T-slot.

8. The backlight module for facilitating installation of a PCB board according to claim 1, characterized in that: The deformation portion is a cone-shaped structure.

9. The backlight module for facilitating installation of a PCB board according to claim 8, characterized in that: A deformation cavity is arranged inside the deformation portion.

10. The backlight module for facilitating installation of a PCB board according to claim 1, characterized in that: The material of the deformation part is rubber.

Images