Backlight module capable of preventing abnormal sound caused by loosening of backlight rubber frame and lower iron frame

Abstract

The utility model discloses a backlight module for preventing loose abnormal sound of a backlight rubber frame and a lower iron frame, which comprises the lower iron frame, a reflector plate, a light guide plate and an optical film group which are sequentially overlapped from bottom to top, the side wall of the lower iron frame is provided with a buckling hole, the outer side of the lower iron frame is fixedly provided with the backlight rubber frame through the buckling hole in a buckling manner, and the backlight rubber frame is provided with a light guide plate. And a single-sided adhesive is adhered and fixed on the side wall of the lower iron frame in a gap between the lower iron frame and the backlight adhesive frame. Due to the fact that the single-sided adhesive is fixedly pasted on the side wall of the lower iron frame, a gap between the backlight rubber frame and the lower iron frame can be reduced, abnormal sound caused by looseness is avoided, the single-sided adhesive collides with the backlight rubber frame when looseness occurs, a certain buffering effect can be achieved, and abnormal sound is further prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and more specifically to a backlight module which can prevent a backlight glue frame and a lower iron frame from loosening and making abnormal noises. Background Art

[0002] The backlight rubber frame and the lower iron frame are generally fixed by snapping together. The backlight rubber frame is arranged on the outside of the lower iron frame. Some backlight rubber frames are designed to be very thin, but the backlight rubber frame is a plastic part, which is easy to deform, especially under high temperature conditions. The backlight rubber frame generates huge heat near the LED lamp. Therefore, the backlight rubber frame often expands after being heated, and the distance between it and the lower iron frame becomes larger, which causes the backlight rubber frame and the lower iron frame to loosen and cause abnormal noise. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to prevent the backlight rubber frame and the lower iron frame from being loosened and making abnormal noises.

[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 the backlight glue frame and the lower iron frame from loosening and making abnormal noises, comprising a lower iron frame, a reflective sheet, a light guide plate and an optical film group stacked in sequence from bottom to top, a buckle hole is opened on the side wall of the lower iron frame, and the backlight glue frame is buckled and fixed to the outer side of the lower iron frame through the buckle hole, and a single-sided adhesive is pasted and fixed on the side wall of the lower iron frame at the gap between the lower iron frame and the backlight glue frame.

[0006] As a preferred embodiment of the backlight module provided by the utility model for preventing the backlight glue frame and the lower iron frame from loosening and making abnormal noises, the single-sided adhesive includes a buffer substrate layer and a sticky layer arranged on the lower surface of the buffer substrate layer, and the sticky layer is glued and fixed to the side wall of the lower iron frame.

[0007] As a preferred implementation of the backlight module for preventing the backlight rubber frame and the lower iron frame from loosening and making abnormal noises provided by the utility model, a color coating is provided on the upper surface of the buffer substrate layer.

[0008] As a preferred implementation of the backlight module for preventing the backlight adhesive frame and the lower iron frame from loosening and making abnormal noises provided by the utility model, a gap is reserved between the backlight adhesive frame and the single-sided adhesive.

[0009] As a preferred implementation of the backlight module for preventing the backlight rubber frame and the lower iron frame from loosening and making abnormal noises provided by the utility model, the gap is greater than 0.05 mm.

[0010] As a preferred implementation of the backlight module for preventing the backlight adhesive frame and the lower iron frame from loosening and making abnormal noises provided by the utility model, the thickness of the single-sided adhesive is 0.05 mm.

[0011] As a preferred embodiment of the backlight module provided by the utility model to prevent the backlight glue frame and the lower iron frame from loosening and making abnormal noises, at least one glue column is provided on the upper surface of the light guide plate, and the optical film group is provided with positioning holes corresponding to the glue column, and the optical film group is sleeved on the glue column.

[0012] As a preferred implementation of the backlight module provided by the utility model for preventing the backlight glue frame and the lower iron frame from loosening and making abnormal noises, the upper surface of the light guide plate is provided with a ring groove surrounding the glue column at the connection between the light guide plate and the glue column.

[0013] As a preferred implementation of the backlight module for preventing the backlight rubber frame and the lower iron frame from loosening and making abnormal noises provided by the utility model, the cross-sectional shape of the annular groove is square, arc or triangle.

[0014] As a preferred implementation of the backlight module for preventing the backlight glue frame and the lower iron frame from loosening and making abnormal noises provided by the utility model, the glue column and the light guide plate are integrally formed.

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

[0016] Since the side wall of the lower iron frame is fixed with a single-sided adhesive, the gap between the backlight glue frame and the lower iron frame can be reduced, thereby avoiding loosening and abnormal noise. When loosening occurs, the single-sided adhesive will collide with the backlight glue frame, which can play a certain buffering role and further prevent abnormal noise. 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 that prevents a backlight rubber frame and a lower iron frame from loosening and making abnormal noises.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of single-sided adhesive.

[0020] Figure 3 This is a schematic diagram of the structure of Example 2.

[0021] Figure 4 for Figure 3 Schematic diagram of the improved structure.

[0022] Description of Figure Numbers:

[0023] Lower iron frame 1; reflective sheet 2; light guide plate 3; optical film group 4; backlight adhesive frame 5; single-sided adhesive 6;

[0024] Buffer substrate layer 61; adhesive layer 62; color coating layer 63;

[0025] Glue column 31; annular groove 32. DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] The utility model provides a backlight module for preventing a backlight glue frame and a lower iron frame from loosening and making abnormal noises, comprising a lower iron frame, a reflective sheet, a light guide plate and an optical film group which are sequentially stacked from bottom to top, a buckle hole is opened on the side wall of the lower iron frame, a backlight glue frame is buckled and fixed to the outer side of the lower iron frame through the buckle hole, and a single-sided adhesive is pasted and fixed on the side wall of the lower iron frame at the gap between the lower iron frame and the backlight glue frame.

[0030] Since the side wall of the lower iron frame is fixed with a single-sided adhesive, the gap between the backlight glue frame and the lower iron frame can be reduced, thereby avoiding loosening and abnormal noise. When loosening occurs, the single-sided adhesive will collide with the backlight glue frame, which can play a certain buffering role and further prevent abnormal noise.

[0031] 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.

[0032] Example 1

[0033] See also Figure 1 and Figure 2 , a backlight module for preventing the backlight adhesive frame 5 and the lower iron frame 1 from loosening and making abnormal noises is provided by the utility model, which comprises a lower iron frame 1, a reflective sheet 2, a light guide plate 3 and an optical film group 4 which are sequentially stacked from bottom to top, a buckle hole is provided on the side wall of the lower iron frame 1, and the backlight adhesive frame 5 is buckled and fixed on the outer side of the lower iron frame 1 through the buckle hole, and a single-sided adhesive 6 is pasted and fixed on the side wall of the lower iron frame 1 at the gap between the lower iron frame 1 and the backlight adhesive frame 5. Since the single-sided adhesive 6 is pasted and fixed on the side wall of the lower iron frame 1, generally speaking, the single-sided adhesive 6 is provided on all four side walls, which can reduce the gap between the backlight adhesive frame 5 and the lower iron frame 1, thereby avoiding loosening and generating abnormal noises, and when loosening occurs, the single-sided adhesive 6 also collides with the backlight adhesive frame 5, which can play a certain buffering role and further prevent abnormal noises.

[0034] The reason why the backlight glue frame 5 and the lower iron frame 1 are not designed to be interference fit is that the material of the backlight glue frame 5 is a plastic part, which is easily affected by temperature and has dimensional changes. If there is not enough deformation space reserved for the backlight glue frame 5, the backlight glue frame 5 will break. Adding a block-shaped single-sided adhesive 6 between the backlight glue frame 5 and the lower iron frame 1 can fix the backlight glue frame 5 and the lower iron frame 1, and prevent the backlight glue frame 5 from breaking.

[0035] Furthermore, the thickness of the single-sided adhesive 6 is 0.05 mm. First, the 0.05 mm single-sided adhesive 6 is adhered to the side of the backlight lower iron frame 1, with the non-adhesive surface facing the surface to be assembled with the backlight adhesive frame 5. The single-sided adhesive 6 is chosen to be adhered to the outer side of the lower iron frame 1 instead of the inner side of the backlight adhesive frame 5 because it is more convenient to adhere to the outer side of the lower iron frame 1 and easier to assemble.

[0036] Furthermore, the single-sided adhesive 6 includes a buffer substrate layer 61 and an adhesive layer 62 disposed on the lower surface of the buffer substrate layer 61, and the adhesive layer 62 is adhered and fixed to the side wall of the lower iron frame 1. When a collision is about to occur, the backlight adhesive frame 5 can collide with the buffer substrate layer 61, which can play a certain buffering role and further prevent abnormal noise.

[0037] Furthermore, a color coating 63 is provided on the upper surface of the buffer substrate layer 61. The brightly colored coating 63 reminds the assembler which side is the sticky side and which side is the non-sticky side, thereby preventing mistakes.

[0038] Furthermore, a gap is reserved between the backlight adhesive frame 5 and the single-sided adhesive 6 , and the gap is greater than 0.05 mm to prevent the backlight adhesive frame 5 from colliding with the lower iron frame 1 and breaking.

[0039] Example 2

[0040] See also Figure 3 and Figure 4 As a further optimization scheme of Example 1, in this embodiment, at least one glue column 31 is provided on the upper surface of the light guide plate 3, preferably four in this embodiment, which are evenly distributed at the four corners of the light guide plate 3, and the optical film group 4 is provided with positioning holes corresponding to the glue columns 31, and the optical film group 4 is sleeved on the glue columns 31. The positioning holes on the optical film group 4 can be positioned and fixed by the glue columns 31, and there is no need to use auxiliary fixtures for positioning, the assembly process is simple, the assembly accuracy is high, and the production cost of the backlight module can be reduced.

[0041] When the number of molds manufactured is large, the mold at the glue column 31 will be worn to a certain extent. The wear here will cause a fillet to be formed between the light guide plate 3 and the glue column 31 produced later. When the fillet exists, the optical film group 4 will interfere with the fillet, resulting in the inability to install the optical film group 4. Therefore, preferably, the upper surface of the light guide plate 3 is provided with a ring groove 32 surrounding the glue column 31 at the connection between the light guide plate 3 and the glue column 31. When the mold is worn, it will only be worn at the ring groove 32, so as to avoid the generation of fillets at the edge corners of the glue column 31 due to mold wear, which will interfere with other parts and affect the assembly accuracy, thereby improving the yield rate and assembly efficiency.

[0042] Furthermore, the cross-sectional shape of the annular groove 32 is square, arc or triangle, but not limited thereto. The square, arc and triangle structures are simple and easy to manufacture; and the assembly accuracy will not be affected after the mold is worn.

[0043] Furthermore, the glue column 31 and the light guide plate 3 are integrally formed to reduce installation steps, reduce installation costs, and improve product competitiveness.

[0044] 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.

[0045] 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 that prevents the backlight rubber frame and the lower iron frame from loosening and making abnormal noises, characterized in that: It includes a lower iron frame, a reflective sheet, a light guide plate and an optical film group which are stacked in sequence from bottom to top, a buckle hole is opened on the side wall of the lower iron frame, a backlight glue frame is buckled and fixed to the outer side of the lower iron frame through the buckle hole, and a single-sided adhesive is glued and fixed to the side wall of the lower iron frame at the gap between the lower iron frame and the backlight glue frame.

2. The backlight module for preventing the backlight rubber frame and the lower iron frame from loosening and making abnormal noise according to claim 1, characterized in that: The single-sided adhesive comprises a buffer substrate layer and an adhesive layer arranged on the lower surface of the buffer substrate layer, and the adhesive layer is adhered and fixed on the side wall of the lower iron frame.

3. The backlight module for preventing the backlight rubber frame and the lower iron frame from loosening and making abnormal noise according to claim 2, characterized in that: The upper surface of the buffer substrate layer is provided with a color coating.

4. The backlight module for preventing the backlight rubber frame and the lower iron frame from loosening and making abnormal noise according to claim 1, characterized in that: A gap is reserved between the backlight adhesive frame and the single-sided adhesive.

5. The backlight module for preventing the backlight rubber frame and the lower iron frame from loosening and making abnormal noise according to claim 4, characterized in that: The gap is greater than 0.05 mm.

6. The backlight module for preventing the backlight rubber frame and the lower iron frame from loosening and making abnormal noise according to claim 1, characterized in that: The thickness of the single-sided adhesive is 0.05 mm.

7. The backlight module for preventing the backlight rubber frame and the lower iron frame from loosening and making abnormal noise according to claim 1, characterized in that: At least one glue column is disposed on the upper surface of the light guide plate, and a positioning hole corresponding to the glue column is opened in the optical film assembly, and the optical film assembly is sleeved on the glue column.

8. The backlight module for preventing the backlight rubber frame and the lower iron frame from loosening and making abnormal noise according to claim 7, characterized in that: An annular groove surrounding the glue column is provided on the upper surface of the light guide plate at the connection between the light guide plate and the glue column.

9. The backlight module for preventing the backlight rubber frame and the lower iron frame from loosening and making abnormal noise according to claim 8, characterized in that: The cross-sectional shape of the annular groove is square, arc or triangle.

10. The backlight module for preventing the backlight rubber frame and the lower iron frame from loosening and making abnormal noise according to claim 7, characterized in that: The glue column and the light guide plate are integrally formed.

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