A middle frame structure convenient to install and a backlight module

Abstract

The application relates to the technical field of vehicle-mounted screens, and particularly provides a middle frame structure convenient to install and a backlight module, which comprises a first frame body and a second frame body, a plurality of buckle grooves are arranged on the inner side wall of the first frame body, the connecting position of the inner side wall and the top surface of the first frame body is chamfered, the chamfer is correspondingly arranged above each buckle groove, and the chamfer and the corresponding buckle groove are arranged at intervals; a buckle matched with the buckle groove is arranged on the outer side wall of the second frame body, an inclined guide surface is arranged at the bottom of the buckle, the buckle is slid into the buckle groove through cooperation of the guide surface and the chamfer, and the first frame body and the second frame body are connected. The utility model can improve the convenience of installation of the first frame body and the second frame body, and avoids the problem that the cleanliness of equipment is reduced due to the generation of chippings caused by friction between the first frame body and the second frame body during installation.

Description

Technical Field

[0001] This application relates to the field of automotive screen technology, and in particular to a mid-frame structure and backlight module that are easy to install. 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. Therefore, in order to increase the product's stability, several snap-fit ​​structures are designed around the iron frame for assembly.

[0004] However, due to the large number of clips and the need to press them in to install the iron frame and die-cast parts, the clips will rub against the die-cast parts, causing iron filings to fall into the product, scratching the internal light guide plate film and reducing the production yield. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide an easy-to-install mid-frame structure and backlight module, which aims to solve the problems of low installation efficiency and iron filings caused by the snap-fit ​​structure of the backlight module in the prior art.

[0006] The technical solution adopted by this application to solve the technical problem is as follows: A mid-frame structure that is easy to install includes a first frame and a second frame. The inner sidewall of the first frame is provided with a plurality of fastening grooves. The connection between the inner sidewall and the top surface of the first frame is chamfered. The chamfers are distributed above each of the fastening grooves, and the chamfers and the corresponding fastening grooves are spaced apart. The outer sidewall of the second frame is provided with a buckle that matches the fastening groove. The bottom of the buckle is provided with an inclined guide surface. The buckle slides into the fastening groove through the cooperation of the guide surface and the chamfer, so that the first frame and the second frame are connected.

[0007] Furthermore, the buckle is integrally formed with the second frame, and the top surface of the buckle is flush with the top surface of the second frame, while the guide surface is located on the side opposite to the top surface.

[0008] Furthermore, the guide surface can be a single arc surface or multiple continuous planes.

[0009] Furthermore, the chamfer is provided around the circumference of the first frame.

[0010] Furthermore, insulating tape is provided to cover the chamfer.

[0011] Optionally, the outer side wall of the second frame is also provided with a collection groove for collecting iron filings. The collection groove is located on the lower side of the buckle, and the cross-sectional profile of the collection groove is U-shaped, with the groove opening facing the guide surface.

[0012] Optionally, the bottom thickness of the sidewall of the second frame is less than the top thickness.

[0013] Optionally, the top surface of the latching groove is rounded at the connection point with the inner wall of the first frame.

[0014] Optionally, the buckles are distributed on opposite sides of the second frame.

[0015] Another technical solution adopted by this application to solve the technical problem is as follows: a backlight module, including a mid-frame structure and a diaphragm assembly as described above, wherein the diaphragm assembly is fixed to the mid-frame structure.

[0016] Compared with existing technologies, this application improves the stability of the middle frame structure by providing corresponding locking grooves and latches on the first and second frames respectively. This allows the second frame to be fastened into the first frame through the engagement of the latches and locking grooves. Simultaneously, the chamfer above the locking grooves facilitates the smooth sliding of the latch's guide surface into the locking groove upon contact with the chamfer, achieving the connection between the first and second frames. This reduces the problem of wear and debris generation between the latches and the first frame during the pressing of the second frame, thereby improving product assembly efficiency and product yield. Attached Figure Description

[0017] Figure 1 This is an exploded structural diagram of a middle frame structure that is easy to install according to Embodiment 1 of this application; Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a front view of a backlight fixing structure according to Embodiment 1 of this application; Figure 4 This is a side sectional view of a backlight fixing structure according to Embodiment 1 of this application; Figure 5 yes Figure 4 A magnified view of a portion of point B in the middle; Figure 6 This is a side sectional view of a backlight fixing structure according to Embodiment 2 of this application; Figure 7 yes Figure 6 A magnified view of a portion of point C.

[0018] Explanation of reference numerals in the attached figures: 10. First frame; 11. Snap-in slot; 12. Chamfer; 13. Rounded corner; 20. Second frame; 21. Snap-in; 22. Guide surface; 23. Collection slot. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] As automobiles become increasingly intelligent, the functions of in-vehicle screens are becoming more diverse. To enhance user experience, the overall size and usable display area of ​​in-vehicle screens are gradually increasing, while the screen bezels are correspondingly narrowing. In-vehicle screens typically consist of a backlight module and a display module. The backlight module generally comprises components such as a central iron frame, a die-cast frame, and a diaphragm assembly. With the trend towards narrow bezel designs, the traditional adhesive connection method between the central iron frame and the die-cast frame is no longer sufficient to meet structural stability requirements, easily leading to problems such as weak adhesion and easy detachment.

[0023] Therefore, such as Figures 1 to 5As shown, Embodiment 1 of this application proposes an easy-to-install mid-frame structure suitable for backlights of vehicle displays. The structure includes a first frame 10 and a second frame 20. The first frame 10 is a die-cast disc-shaped structure with multiple locking grooves 11 on its inner sidewall. The second frame 20 is an annular central iron frame, including a bottom frame and an outer frame integrally formed with the bottom frame and extending upwards. The outer side of the outer frame is provided with buckles 21 that match the locking grooves 11.

[0024] The inner sidewall and top surface of the first frame 10 are provided with a chamfer 12 structure. The chamfer 12 is distributed above each snap-fit ​​groove 11 and is spaced apart from the corresponding snap-fit ​​groove 11. The bottom of the snap fastener 21 of the second frame 20 is provided with an inclined guide surface 22. Through the cooperation of the guide surface 22 and the chamfer 12 of the first frame 10, the snap fastener 21 can smoothly slide into the snap-fit ​​groove 11, thereby achieving a stable connection between the first frame 10 and the second frame 20. This structure uses snap fastener 21 connection instead of traditional adhesive method, which significantly improves the connection strength and stability between the two frames in a narrow frame design.

[0025] Specifically, such as Figure 2 As shown, the chamfer 12 is located on the upper side of the latching groove 11 and is spaced apart to facilitate guiding the buckle 21 to slide into the latching groove 11 along its inclined surface. The chamfer 12 is a C-angle (i.e., a 45° chamfer 12) with a length ranging from 0.2mm to 0.4mm, ensuring the guiding function while avoiding any impact on the structural strength.

[0026] It should be noted that the upper position described in this embodiment is based on the state when the first frame 10 and the second frame 20 are placed horizontally, that is, the first frame 10 is located at the bottom and the second frame 20 is located at the top.

[0027] The buckle 21 has an approximately fan-shaped cross-section structure that is wider at the top and narrower at the bottom. The top surface of the buckle 21 is flush with the top surface of the second frame 20, and the guide surface 22 is located at the bottom of the buckle 21 (i.e., the side away from the top surface). This structure helps to disperse stress during the pressing process and improves the strength and insertion smoothness of the buckle 21.

[0028] like Figure 5 As shown, in this embodiment, the guide surface 22 is a single continuous arc surface, which helps the buckle 21 slide smoothly during insertion and reduces wear.

[0029] In some embodiments, chamfers 12 are provided around the top of the entire inner sidewall of the first frame 10 to provide all-around guidance for installation, making it easier for workers to install the second frame 20 onto the first frame 10.

[0030] To enhance insulation protection, insulating tape can be applied to the surface of the chamfer 12. The insulating tape has low friction properties, which can reduce the resistance encountered when the buckle 21 of the second frame 20 contacts the chamfer 12. At the same time, the insulating tape can prevent the first frame 10 from generating metal debris due to friction, further improving the cleanliness of the backlight.

[0031] On the outer wall of the second frame 20, below the buckle 21, there is a collection groove 23 for collecting iron filings. The groove has a U-shaped cross-section, with the opening facing the guide surface 22. This collection groove 23 can effectively collect metal filings generated by friction during assembly, preventing them from affecting the cleanliness and optical performance of the display components.

[0032] To facilitate the fit between the second frame 20 and the first frame 10, the bottom thickness of the side wall of the second frame 20 is designed to be less than the top thickness, so that the side wall of the second frame 20 can deform to a certain extent when the buckle 21 is under force, thereby further improving the smoothness of assembly.

[0033] The top surface of the snap-fit ​​groove 11 is provided with a rounded corner 13 at the connection between it and the inner side wall of the first frame 10. The rounded corner 13 makes it easier for the buckle 21 to enter the snap-fit ​​groove 11, thereby improving the assembly efficiency of the first frame 10 and the second frame 20.

[0034] In this embodiment, the latches 21 are distributed opposite to each other on both sides of the second frame 20, which helps to achieve balanced fastening and stable connection between the frames. Specifically, the number of latches 21 on both sides of the second frame 20 is inconsistent, thereby avoiding incorrect installation orientation of the second frame 20 and the first frame 10.

[0035] like Figure 6 and Figure 7 As shown, in embodiment 2, the guide surface 22 of the buckle 21 can be composed of multiple continuous planes to form a zigzag guide structure, which can also achieve smooth guidance.

[0036] This application also proposes a backlight module, including a mid-frame structure as described above for easy installation and a diaphragm assembly fixed thereon, the diaphragm assembly being fixed to the mid-frame structure for easy installation.

[0037] This application improves the stability of the middle frame structure by providing corresponding locking grooves and latches on the first and second frames respectively, allowing the second frame to be fastened into the first frame through the engagement of the latches and locking grooves. Simultaneously, a chamfer is provided above the locking grooves to facilitate the smooth sliding of the latch's guide surface into the locking groove upon contact with the chamfer, thus connecting the first and second frames. This reduces the problem of wear and debris generation between the latches and the first frame during the pressing of the second frame, improving product assembly efficiency and product yield.

[0038] 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 mid-frame structure that is easy to install, characterized in that, The system includes a first frame and a second frame. The inner sidewall of the first frame has multiple snap-fit ​​grooves. The connection between the inner sidewall and the top surface of the first frame is chamfered, and the chamfers are distributed above each snap-fit ​​groove, with a gap between the chamfers and the corresponding snap-fit ​​grooves. The outer sidewall of the second frame has a buckle that matches the snap-fit ​​groove. The bottom of the buckle has an inclined guide surface. The buckle slides into the snap-fit ​​groove through the cooperation of the guide surface and the chamfer, thereby connecting the first frame and the second frame.

2. The easy-to-install middle frame structure according to claim 1, characterized in that, The buckle is integrally formed with the second frame, and the top surface of the buckle is flush with the top surface of the second frame, while the guide surface is located on the side opposite to the top surface.

3. The easy-to-install middle frame structure according to claim 2, characterized in that, The guide surface can be a single arc surface or multiple continuous planes.

4. The easy-to-install middle frame structure according to claim 1, characterized in that, The chamfer is set around the first frame.

5. The easy-to-install middle frame structure according to claim 1, characterized in that, The chamfer is covered with insulating tape.

6. The easy-to-install middle frame structure according to claim 1, characterized in that, The outer side wall of the second frame is also provided with a collection groove for collecting iron filings. The collection groove is located on the lower side of the buckle. The cross-sectional profile of the collection groove is U-shaped and the groove opening is facing the guide surface.

7. The easy-to-install middle frame structure according to claim 1, characterized in that, The bottom thickness of the sidewall of the second frame is less than the top thickness.

8. The easy-to-install middle frame structure according to claim 1, characterized in that, The top surface of the latching groove is rounded at the connection point with the inner sidewall of the first frame.

9. The easy-to-install middle frame structure according to claim 1, characterized in that, The buckles are distributed on both sides of the second frame.

10. A backlight module, characterized in that, Includes an easy-to-install mid-frame structure and a diaphragm assembly as described in any one of claims 1-9, wherein the diaphragm assembly is fixed to the easy-to-install mid-frame structure.

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