Backlight fixing structure and backlight module

Abstract

The application relates to the technical field of vehicle-mounted screens, and particularly provides a backlight source fixing structure and a backlight module, wherein the backlight source fixing structure comprises a bottom frame, a concave accommodating cavity is formed in the middle part of the bottom frame, at least two spaced distribution buckling positions are arranged on the inner side wall of the bottom frame, and the at least two buckling positions are oppositely distributed on the two sides of the bottom frame. A middle frame is arranged; a buckle matched with the buckling position is arranged on the outer side wall of the middle frame, the middle frame is fixed in the accommodating cavity through cooperation of the buckle and the buckling position, the top surface of the buckle is flushly arranged with the top surface of the middle frame, a glue groove extending along the length direction of the buckle is arranged on the top surface of the buckle, and a sticking piece is arranged in the glue groove. The application fully improves the connection stability between the middle frame and the bottom frame, improves the stability of the backlight source under the premise of a narrow frame, and effectively solves the problems of middle frame loosening or falling off.

Description

Technical Field

[0001] This application relates to the field of automotive screen technology, and in particular to a backlight fixing structure and a backlight module. Background Technology

[0002] Existing vehicle screens include display modules, iron frames, die-cast parts, etc. The iron frames and die-cast parts are fixed together by double-sided adhesive. In the past, vehicle backlight products were small in size and had large bezel widths, so double-sided adhesive could meet the product requirements.

[0003] However, with the development of technology, the size of automotive backlight screens is getting larger and the bezels are getting narrower. Traditional adhesive structures can no longer meet the product performance requirements. Problems such as loosening, falling off, abnormal noise, and light leakage can occur when the iron frame and die-cast parts are connected by adhesive. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a backlight fixing structure and a backlight module for a display module, which aims to solve the problem of loose fixing between the middle frame and the bottom frame when the backlight module bezel is narrow in the prior art.

[0005] The technical solution adopted by this application to solve the technical problem is as follows: a backlight fixing structure, comprising: The bottom frame has a recessed receiving cavity in the middle, and at least two spaced fasteners are provided on the inner sidewall of the bottom frame; the at least two fasteners are distributed opposite to each other on both sides of the bottom frame. The middle frame has a buckle on its outer side wall that matches the buckle position. The middle frame is fixed in the receiving cavity by the buckle and the buckle position. The top surface of the buckle has a glue groove extending along the length direction of the buckle. An adhesive is provided in the glue groove.

[0006] Furthermore, the outer side wall of the middle frame is provided with an outwardly extending and integrally formed flanged side plate, the flanged side plate is flush with the top of the middle frame, and an elastic pad is provided at the bottom of the flanged side plate.

[0007] Furthermore, the cross-section of the buckle is geometric or circular.

[0008] Furthermore, the number of fasteners is fifteen and they are evenly distributed on the bottom frame, wherein fasteners are distributed on both sides of the bottom frame, and the number of fasteners on the two sides is different.

[0009] Furthermore, the top surface of the buckle is inclined to the inner side of the middle frame.

[0010] Furthermore, the top surface of the buckle is flush with the top surface of the middle frame.

[0011] Furthermore, the bottom frame is also provided with reinforcing ribs, which are located on the side opposite to the buckle.

[0012] Furthermore, the inner sidewall of the middle frame is covered with a matte coating for absorbing light.

[0013] Furthermore, the middle frame is provided with several outwardly extending positioning plates, and the bottom frame is provided with grooves that match the positioning plates.

[0014] Another technical solution adopted by this application to solve the technical problem is as follows: a backlight module, including a backlight fixing structure and a light-emitting component as described above, wherein the light-emitting component is fixed on the backlight fixing structure.

[0015] Compared with the prior art, this application achieves the fixation between the middle frame and the bottom frame by setting corresponding buckles and fasteners on the side walls of the middle frame and the bottom frame respectively, which greatly improves the connection stability between the middle frame and the bottom frame. In addition, glue grooves are set on the buckles and adhesive parts are set in them. The adhesive parts can play the role of shock absorption and fixation, further improving the stability of the backlight under the premise of narrow bezel, and effectively solving the problem of loosening or falling off the middle frame. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a backlight fixing structure in an embodiment of this application; Figure 2 This is a front view of a backlight fixing structure according to an embodiment of this application; Figure 3 This is a side sectional view of a backlight fixing structure according to an embodiment of this application; Figure 4 yes Figure 2 A magnified view of a portion of point A in the middle; Figure 5 yes Figure 3 A magnified view of a portion of point B in the middle.

[0017] Explanation of reference numerals in the attached figures: 10. Base frame; 11. Buckle; 12. Groove; 20. Middle frame; 21. Buckle; 22. Adhesive groove; 23. Adhesive piece; 24. Flanged side panel; 25. Elastic pad; 26. Positioning plate. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0019] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] As automobiles become increasingly intelligent, the functions of in-vehicle screens are also gradually increasing. To improve user experience, the overall size and usable size of in-vehicle screens are gradually increasing, while the screen bezels are narrowing. In-vehicle screens typically include a backlight module and a display module. The backlight module includes a central iron frame, a die-cast frame, and light-emitting components. The traditional adhesive connection method for the central iron frame and die-cast frame of in-vehicle screens is not effective in fixing them under the above-mentioned size changes. Since in-vehicle screens are exposed to vibration and high temperature environments for a long time, simple double-sided adhesive is difficult to meet the increasingly large backlight fixing requirements of in-vehicle screens.

[0022] In this regard, such as Figures 1 to 5 As shown, the first aspect of this application proposes a backlight fixing structure, including a bottom frame 10 and a middle frame 20; a recessed receiving cavity is formed in the middle of the bottom frame 10, and at least two spaced fasteners 11 are provided on the inner sidewall of the bottom frame 10; the at least two fasteners 11 are distributed opposite to each other on both sides of the bottom frame 10.

[0023] In this embodiment, the bottom frame 10 is used to support and protect various components inside the backlight module. It is integrally formed by die casting. The bottom frame 10 is disc-shaped, with its outer edge extending upwards. The fastener 11 is disposed on the inner side of the upwardly extending edge. Specifically, the cross-sectional profile of the fastener 11 is rectangular.

[0024] The outer wall of the middle frame 20 is provided with a buckle 21 that matches the buckle position 11. The middle frame 20 is fixed in the receiving cavity by the engagement of the buckle 21 and the buckle position 11. The top surface of the buckle 21 has an adhesive groove 22 extending along the length direction of the buckle 21, and an adhesive member 23 is provided in the adhesive groove 22. The adhesive member 23 is configured as a flowing adhesive or a solid adhesive block. The adhesive member 23 is both sticky and elastic. One side of the adhesive member 23 is in contact with the buckle position 11. After the middle frame 20 is fixed to the buckle position 11 by the buckle 21, the adhesive member 23 connects the middle frame 20 and the bottom frame 10 to each other, preventing the middle frame 20 and the bottom frame 10 from coming loose during drop tests or bump tests.

[0025] In this embodiment, the middle frame 20 is a frame structure with a through hole in the middle. The outer edge of the middle frame 20 extends upward to form a surrounding plate. The buckle 21 is set on the outer side wall of the surrounding plate. The buckle 21 is integrally formed with the middle frame 20. The buckle 21 can be flush with the height of the top surface of the surrounding plate or set below the height of the top surface of the surrounding plate.

[0026] In some of these embodiments, such as Figure 5 As shown, the outer side wall of the middle frame 20 is provided with an outwardly extending and integrally formed flanged side plate 24. The flanged side plate 24 is flush with the top of the middle frame 20, and an elastic pad 25 is provided at the bottom of the flanged side plate 24. When the middle frame 20 is fixed to the bottom frame 10 by the cooperation of the buckle 21 and the fastener 11, since there is still a certain gap between the buckle 21 and the fastener 11, in order to ensure that the relative position between the middle frame 20 and the bottom frame 10 remains fixed, the flanged side plate 24 is provided so that the middle frame 20 can be supported on the bottom frame 10. During the process of pressing down and fixing the middle frame 20, the compression characteristics of the elastic pad 25 allow the buckle 21 of the middle frame 20 to be installed into the fastener 11. At the same time, the elasticity of the elastic pad 25 supports the middle frame 20, making the connection between the buckle 21 and the fastener 11 between the middle frame 20 and the bottom frame 10 more stable.

[0027] In some of these embodiments, such as Figure 4 As shown, the cross-section of the buckle 21 is geometric or circular.

[0028] In some of these embodiments, such as Figure 2 As shown, there are fifteen fasteners 11 evenly distributed on the bottom frame 10. Fasteners 11 are distributed on both sides of the bottom frame 10, and the number of fasteners 11 on each side is different. Specifically, by setting different numbers of fasteners 11 on the upper and lower sides of the bottom frame 10, the problem of incorrect assembly during the assembly process can be effectively avoided, thus improving assembly efficiency.

[0029] In some embodiments, the top surface of the latch 21 is inclined to the inside of the middle frame 20. This makes the latch 11 extremely difficult to detach once engaged, providing maximum holding force.

[0030] In some embodiments, the top surface of the buckle 21 is flush with the top surface of the middle frame 20. This simplifies the structure of the flanged side panel 24 and reduces the production cost of the fixing structure.

[0031] In some embodiments, the bottom frame 10 is further provided with reinforcing ribs, which are located on the side opposite to the buckle 11. The reinforcing ribs can effectively improve the stability of the buckle 11 and prevent the buckle 11 from deforming or tearing under long-term stress.

[0032] In an optional embodiment, the inner sidewall of the middle frame 20 is covered with a matte coating for absorbing light. This prevents light from the light-emitting components from leaking from the sides, improving the performance of the backlight module.

[0033] In an optional embodiment, the middle frame 20 is further provided with several outwardly extending positioning plates 26, and the bottom frame 10 is provided with grooves 12 that match the positioning plates 26. The positioning plates 26 help assembly personnel quickly determine the relative positions of the middle frame 20 and the bottom frame 10, thereby completing the installation.

[0034] On the other hand, this application proposes a backlight module, including a backlight fixing structure and a light-emitting component as described above, wherein the light-emitting component is fixed on the backlight fixing structure.

[0035] This application achieves the fixation between the middle frame 20 and the bottom frame 10 by setting corresponding buckles 21 and fasteners 11 on the side walls of the middle frame 20 and the bottom frame 10 respectively, which greatly improves the connection stability between the middle frame 20 and the bottom frame 10. In addition, a glue groove 22 is set on the buckle 21 and an adhesive part 23 is set therein. The adhesive part 23 can play the role of shock absorption and fixation, further improving the stability of the backlight under the premise of narrow bezel, and effectively solving the problem of the middle frame 20 loosening or falling off.

[0036] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A backlight fixing structure, characterized in that, include: The bottom frame has a recessed receiving cavity in the middle, and at least two spaced fasteners are provided on the inner sidewall of the bottom frame; the at least two fasteners are distributed opposite to each other on both sides of the bottom frame. The middle frame has a buckle on its outer side wall that matches the buckle position. The middle frame is fixed in the receiving cavity by the buckle and the buckle position. The top surface of the buckle has a glue groove extending along the length direction of the buckle. An adhesive is provided in the glue groove.

2. The backlight fixing structure according to claim 1, characterized in that, The outer side wall of the middle frame is provided with an outwardly extending and integrally formed flanged side plate. The flanged side plate is flush with the top of the middle frame, and an elastic pad is provided at the bottom of the flanged side plate.

3. The backlight fixing structure according to claim 1, characterized in that, The cross-section of the buckle is geometric or circular.

4. The backlight fixing structure according to claim 1, characterized in that, The number of fasteners is fifteen and they are evenly distributed on the bottom frame. Fasteners are distributed on both sides of the bottom frame, and the number of fasteners on the two sides is different.

5. The backlight fixing structure according to claim 1, characterized in that, The top surface of the buckle is inclined to the inner side of the middle frame.

6. The backlight fixing structure according to claim 1, characterized in that, The top surface of the buckle is flush with the top surface of the middle frame.

7. The backlight fixing structure according to claim 1, characterized in that, The bottom frame is also provided with reinforcing ribs, which are located on the side opposite to the buckle.

8. The backlight fixing structure according to claim 1, characterized in that, The inner sidewall of the middle frame is covered with a matte coating for absorbing light.

9. The backlight fixing structure according to claim 1, characterized in that, The middle frame is also provided with several outwardly extending positioning plates, and the bottom frame is provided with grooves that match the positioning plates.

10. A backlight module, characterized in that, It includes the backlight fixing structure and light-emitting component as described in any one of claims 1-9, wherein the light-emitting component is fixed to the backlight fixing structure.

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