Backlight module capable of preventing PCB from falling off

Abstract

The utility model discloses a backlight module for preventing a PCB (printed circuit board) from falling off, which comprises a rear iron frame, a rubber frame and the PCB, the rear iron frame comprises a bottom plate and a side wall extending upwards from the edge of the bottom plate, the rubber frame is arranged on the upper surface of the bottom plate, the PCB is arranged on the lower surface of the bottom plate, and the PCB is arranged on the side wall of the bottom plate. The top and the bottom of the lower surface of the bottom plate are each provided with at least one retaining wall in a punch forming mode, the retaining walls are perpendicular to the bottom plate, the left side and the right side of the lower surface of the bottom plate are each provided with at least one twisting foot in a punch forming mode, the twisting feet can rotate, and the PCB is placed in a space defined by the retaining walls and the twisting feet. According to the utility model, the twisting pin and the retaining wall are arranged on the rear iron stand in a die punch forming mode, the PCB is limited through the retaining wall, and the PCB is fixed after the twisting pin rotates, so that the assembly reliability of the PCB can be improved and the PCB can be prevented from falling off on the premise that the cost is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and more specifically to a backlight module for preventing a PCB board from falling off. Background Art

[0002] In order to save costs, conventional backlight modules with a rear iron frame and a PCB board usually have several convex bumps on the rear iron frame, and tapping threads on the convex bumps, and then use screws to fix the PCB board to the rear iron frame. However, due to the limited thickness of the rear iron frame, this structure has a relatively small number of tapping threads on the convex bumps, and can withstand relatively small torque. Therefore, there is a greater risk of thread slippage when screwing, and the screws are more likely to loosen after being screwed, affecting the overall reliability of the backlight module. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to prevent the PCB board from falling off.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] In order to solve the above technical problems, the utility model provides a backlight module that prevents a PCB board from falling off, comprising a rear iron frame, a rubber frame and a PCB board, the rear iron frame comprising a bottom plate and a side wall extending upward from the edge of the bottom plate, the rubber frame is arranged on the upper surface of the bottom plate, the PCB board is arranged on the lower surface of the bottom plate, at least one retaining wall is stamped on the top and bottom of the lower surface of the bottom plate, the retaining wall is perpendicular to the bottom plate, at least one twist foot is stamped on the left and right sides of the lower surface of the bottom plate, the twist foot is rotatable, and the PCB board is placed in the space defined by the retaining wall and the twist foot.

[0006] As a preferred implementation of the backlight module for preventing the PCB board from falling off provided by the utility model, the width of the retaining wall is 8 mm to 12 mm.

[0007] As a preferred implementation of the backlight module for preventing the PCB board from falling off provided by the utility model, the assembly gap between the retaining wall and the PCB board is 0.3 mm to 0.5 mm.

[0008] As a preferred implementation of the backlight module for preventing the PCB board from falling off provided by the utility model, the cross-sectional shape of the twist foot is L-shaped, and the twist foot includes a root portion connected to the base plate and a twist portion connected to the root.

[0009] As a preferred implementation of the backlight module for preventing the PCB board from falling off provided by the utility model, the root width of the twist foot is 4mm to 6mm.

[0010] As a preferred implementation of the backlight module for preventing the PCB board from falling off provided by the utility model, the width of the twist portion of the twist foot is 4 mm to 6 mm.

[0011] As a preferred implementation of the backlight module for preventing the PCB board from falling off provided by the utility model, an inner concave portion is provided at the connection between the root portion and the inner side of the twist portion.

[0012] As a preferred implementation of the backlight module for preventing the PCB board from falling off provided by the utility model, the inner concave portion has a smooth transition.

[0013] As a preferred implementation of the backlight module for preventing the PCB board from falling off provided by the utility model, the depth of the inner recess is 0.5 mm to 1.0 mm.

[0014] As a preferred implementation of the backlight module for preventing the PCB board from falling off provided by the utility model, the distance between the deepest point of the inner concave portion and the lower surface of the root portion is 1.5 mm to 2.5 mm.

[0015] The utility model has the following beneficial effects:

[0016] Since retaining walls are stamped on the top and bottom of the lower surface of the bottom plate, and twist feet are stamped on the left and right sides of the lower surface of the bottom plate, the twist feet and retaining walls are set on the rear iron frame by using mold stamping, the retaining walls are used to limit the PCB board, and the twist feet are rotated to fix the PCB board, so that the assembly reliability of the PCB board can be improved without affecting the cost and the PCB board can be prevented from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme in the present application, 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 present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 The utility model provides a structural schematic diagram of a backlight module for preventing a PCB board from falling off.

[0019] Figure 2 for Figure 1 Top view of the .

[0020] Figure 3 for Figure 2 Schematic diagram of the structure after combining with PCB board.

[0021] Figure 4 for Figure 1Enlarged view of point A in the middle.

[0022] Description of Figure Numbers:

[0023] Rear iron frame 1; plastic frame 2; PCB board 3; bottom plate 11; side wall 12; retaining wall 13; twist foot 14;

[0024] Root portion 141; twist portion 142; inner recessed portion 143. DETAILED DESCRIPTION

[0025] 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.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] The utility model provides a backlight module for preventing a PCB board from falling off, comprising a rear iron frame, a glue frame and a PCB board, wherein the rear iron frame comprises a bottom plate and a side wall extending upward from an edge of the bottom plate, the glue frame is arranged on the upper surface of the bottom plate, the PCB board is arranged on the lower surface of the bottom plate, at least one retaining wall is stamped and formed on the top and bottom of the lower surface of the bottom plate, the retaining wall is perpendicular to the bottom plate, at least one twist foot is stamped and formed on the left and right sides of the lower surface of the bottom plate, the twist foot is rotatable, and the PCB board is placed in a space defined by the retaining wall and the twist foot.

[0029] Since retaining walls are stamped on the top and bottom of the lower surface of the bottom plate, and twist feet are stamped on the left and right sides of the lower surface of the bottom plate, the twist feet and retaining walls are set on the rear iron frame by using mold stamping, the retaining walls are used to limit the PCB board, and the twist feet are rotated to fix the PCB board, so that the assembly reliability of the PCB board can be improved without affecting the cost and the PCB board can be prevented from falling off.

[0030] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention.

[0031] Example 1

[0032] See also Figures 1 to 3, a backlight module for preventing a PCB board from falling off is provided by the utility model, which comprises a rear iron frame 1, a glue frame 2 and a PCB board 3, the rear iron frame 1 comprises a bottom plate 11 and a side wall 12, the side wall 12 is formed by extending upward from the edge of the bottom plate 11, the glue frame 2 is arranged on the upper surface of the bottom plate 11, and the PCB board 3 is arranged on the lower surface of the bottom plate 11, and at least one retaining wall 13 is stamped on the top and bottom of the lower surface of the bottom plate 11, and the retaining wall 13 is perpendicular to the bottom plate 11, and at least one twist foot 14 is stamped on the left and right sides of the lower surface of the bottom plate 11. In this embodiment, there are four retaining walls 13, and two retaining walls 13 are arranged on the top and bottom of the bottom plate 11, and there are four twist feet 14, and two twist feet 14 are arranged on the left and right sides of the bottom plate 11. In other embodiments, the number and position of the twist feet 14 are required to be evenly distributed to achieve the limiting and fixing effects, and the twist feet 14 are rotatable, and the PCB board 3 is placed in the space defined by the retaining walls 13 and the twist feet 14. Since retaining walls 13 are stamped on the top and bottom of the lower surface of the bottom plate 11, and twist feet 14 are stamped on the left and right sides of the lower surface of the bottom plate 11, the twist feet 14 and retaining walls 13 are set on the rear iron frame 1 by mold stamping, the retaining walls 13 are used to limit the PCB board 3, and the twist feet 14 are rotated to fix the PCB board 3, so that the assembly reliability of the PCB board 3 can be improved without affecting the cost, and the PCB board 3 can be prevented from falling off.

[0033] Furthermore, the width of the retaining wall 13 is 8 mm to 12 mm. The assembly gap between the retaining wall 13 and the PCB board 3 is 0.3 mm to 0.5 mm. The height of the retaining wall 13 is consistent with the thickness of the PCB board 3.

[0034] Furthermore, in order to enable the twist foot 14 to best match the PCB board 3 and perform twisting and fixing, the cross-sectional shape of the twist foot 14 is L-shaped, and the twist foot 14 includes a root 141 and a twisting portion 142, the root 141 is connected to the base plate 11, and the twisting portion 142 is connected to the root 141.

[0035] Furthermore, the root portion 141 of the twist foot 14 has a width of 4 mm to 6 mm to ensure that the root portion 141 has sufficient strength.

[0036] Furthermore, the width of the twisting portion 142 of the twisting foot 14 is 4 mm to 6 mm to ensure that the twisting foot 14 has enough length to press onto the PCB board 3 after being twisted, and the assembly gap between the twisting portion 142 and the PCB board 3 is 0.3 mm to 0.5 mm.

[0037] Example 2

[0038] See also Figure 4 As a further optimization solution of Example 1, in this embodiment, an inner recess 143 is provided at the connection between the root portion 141 and the inner side of the torsion portion 142, and the inner recess 143 has a smooth transition to avoid stress concentration.

[0039] Furthermore, the depth of the inner recess 143 is 0.5mm to 1.0mm, and the distance between the deepest point of the inner recess 143 and the lower surface of the root 141 is 1.5mm to 2.5mm. This is to avoid the problem that the twist foot 14 is too thin and easy to break when twisting. The assembly clearance between the twist foot 14 and the PCB board 3 is 0.3mm to 0.5mm.

[0040] 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.

[0041] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application 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 present application more thorough and comprehensive. Although the present application 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 perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A backlight module for preventing a PCB board from falling off, characterized in that: It includes a rear iron frame, a plastic frame and a PCB board. The rear iron frame includes a bottom plate and a side wall extending upward from the edge of the bottom plate. The plastic frame is arranged on the upper surface of the bottom plate, and the PCB board is arranged on the lower surface of the bottom plate. The top and bottom of the lower surface of the bottom plate are both stamped with at least one retaining wall, and the retaining wall is perpendicular to the bottom plate. The left and right sides of the lower surface of the bottom plate are both stamped with at least one twist foot, and the twist foot is rotatable. The PCB board is placed in the space defined by the retaining wall and the twist foot.

2. The backlight module for preventing the PCB board from falling off according to claim 1, characterized in that: The width of the retaining wall is 8 mm to 12 mm.

3. The backlight module for preventing the PCB from falling off according to claim 1, characterized in that: The assembly gap between the retaining wall and the PCB board is 0.3 mm to 0.5 mm.

4. The backlight module for preventing the PCB from falling off according to claim 1, characterized in that: The cross-sectional shape of the twist foot is L-shaped, and the twist foot comprises a root portion connected to the base plate and a twist portion connected to the root portion.

5. The backlight module for preventing the PCB from falling off according to claim 4, characterized in that: The root width of the twist foot is 4mm to 6mm.

6. The backlight module for preventing the PCB from falling off according to claim 4, characterized in that: The width of the twist portion of the twist foot is 4 mm to 6 mm.

7. The backlight module for preventing the PCB from falling off according to claim 4, characterized in that: An inner concave portion is provided at the connection between the root portion and the inner side of the twist portion.

8. The backlight module for preventing the PCB from falling off according to claim 7, characterized in that: The inner concave portion has a smooth transition.

9. The backlight module for preventing the PCB from falling off according to claim 7, characterized in that: The depth of the inner recess is 0.5 mm to 1.0 mm.

10. The backlight module for preventing the PCB from falling off according to claim 7, characterized in that: The distance between the deepest point of the inner recess and the lower surface of the root is 1.5 mm to 2.5 mm.

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