Backlight frame limiting structure and vehicle-mounted screen

Abstract

The application relates to the technical field of vehicle-mounted screens, and particularly provides a backlight frame limiting structure and a vehicle-mounted screen, wherein the backlight frame limiting structure comprises a bottom frame and a limiting boss, a frame is arranged around the bottom frame, a plurality of glue overflow grooves are arranged on the top surface of the frame, the glue overflow grooves are distributed around the frame, and at least two glue overflow grooves are oppositely distributed on the two sides of the frame; the limiting boss is arranged in the glue overflow groove, the height of the top surface of the limiting boss is greater than the height of the top surface of the frame, so that a gap is formed when a cover plate is placed on the limiting boss. When a glass cover plate is fixed on the backlight, the top of the frame is provided with the limiting boss, the glass cover plate can only be arranged on the limiting boss, the thickness of glue used for connecting the glass cover plate and the backlight is ensured, and the fixing effect is ensured. Meanwhile, the glue overflow groove can accommodate the glue, the glue overflow is avoided, and the product effect is affected.

Description

Technical Field

[0001] This application relates to the field of automotive screen technology, and more particularly to a backlight frame limiting structure and an automotive screen. Background Technology

[0002] Existing vehicle-mounted screens typically consist of a glass cover and a backlight. In current structures, the backlight and glass cover are usually connected using double-sided tape (VHB adhesive). However, as vehicle-mounted display screens become larger and the bezels narrower, the weight of the glass cover increases, reducing the area available for attaching the double-sided tape. During testing, the double-sided tape-attached structure may experience separation and detachment of the backlight from the glass cover, resulting in low product reliability.

[0003] While replacing double-sided tape with a stronger adhesive results in a more secure bond, uneven adhesive thickness between the backlight and the glass cover leads to inconsistent bonding quality. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a backlight frame limiting structure and a vehicle screen, which aims to solve the problem that double-sided adhesive cannot be applied well when the bezel of the vehicle screen is narrow.

[0005] The technical solution adopted by this application to solve the technical problem is as follows: a backlight frame limiting structure, comprising: A bottom frame, on which a border is provided, and a plurality of glue overflow grooves are provided on the top surface of the border. The glue overflow grooves are distributed around the border, and at least two of the glue overflow grooves are distributed opposite to each other on both sides of the border. A limiting boss is provided in the overflow groove. The top surface height of the limiting boss is greater than the top surface height of the frame so that a gap is formed when the cover plate is placed on the limiting boss.

[0006] Furthermore, along the thickness direction of the bottom frame, the cross-sectional profile of the limiting boss is rectangular.

[0007] Furthermore, at least one sidewall of the limiting boss is located on the same vertical plane as the inner sidewall of the frame.

[0008] Furthermore, the limiting boss is made of one of plastic, rubber, or silicone.

[0009] Furthermore, the top surface of the bottom frame is also provided with a limiting outer edge for preventing glue overflow. The limiting outer edge protrudes upward and is arranged around the frame. The height of the top surface of the limiting outer edge is less than the height of the top surface of the limiting boss.

[0010] Furthermore, the outer edge of the limiting device is provided with several injection pinholes.

[0011] Furthermore, the top surface of the limiting boss is inclined toward the inside of the bottom frame.

[0012] Furthermore, the limiting boss is located in the middle of the overflow groove.

[0013] The second aspect of this application provides a vehicle screen, including a backlight frame limiting structure, adhesive, and a glass cover as described above. The glass cover is disposed on the backlight frame limiting structure and mounted on the limiting protrusion. The adhesive is disposed between the glass cover and the backlight frame limiting structure.

[0014] Furthermore, the glass cover plate is provided with a limiting groove corresponding to the limiting boss.

[0015] Compared with existing technologies, the embodiments of this application provide a certain space for glue flow by setting an overflow groove and a limiting boss on the top surface of the frame. When the glass cover is attached and fixed to the backlight, since the limiting boss is provided at the top of the frame and its height is higher than the top surface of the frame, the glass cover can only be placed on the limiting boss. This ensures that when the glass cover and the backlight are connected with glue, the glue has a certain thickness, thus guaranteeing the bonding effect. At the same time, the overflow groove can hold a certain amount of glue, preventing excessive glue from overflowing outside the backlight area and affecting the product effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a backlight frame limiting structure according to this application; Figure 2 This is a front view of a backlight frame limiting structure according to this application; Figure 3 This is a side sectional view of a backlight frame limiting structure according to 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. Frame; 12. Glue overflow groove; 20. Limiting boss; 30. Limiting outer edge; 31. Glue injection pinhole; 40. Glass cover plate; 50. Adhesive. 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 becoming more diverse. To improve user experience, the overall size and usable display area of ​​in-vehicle screens are gradually increasing, while the screen bezels are correspondingly narrowing. Using double-sided tape to adhere the glass cover to the backlight results in poor adhesion. Although replacing the double-sided tape with a stronger adhesive can improve adhesion, adhesive is a fluid, and applying pressure after attaching the glass cover to the backlight can cause adhesive overflow. This results in unstable thickness after pressing, leading to dimensional inconsistencies. Insufficient pressure reduces the adhesive's contact area, preventing activation and resulting in insufficient adhesion strength. Excessive pressure causes all the adhesive to overflow, resulting in poor adhesion.

[0022] Therefore, such as Figures 1 to 5As shown, this application proposes a backlight frame limiting structure, including a bottom frame 10 and limiting bosses 20. A frame 11 is arranged around the bottom frame 10, and the top surface of the frame 11 has multiple glue overflow grooves 12, which are distributed around the frame 11, with at least two grooves 12 opposite to each other on both sides of the frame 11. The limiting bosses 20 are correspondingly disposed in the glue overflow grooves 12, and the top surface height of the limiting bosses 20 is greater than the top surface height of the frame 11, so that a gap is formed when the cover plate is placed on the limiting bosses 20. By setting the glue overflow grooves 12 and the limiting bosses 20, the bonding effect when using glue to attach the backlight and the cover plate is ensured.

[0023] In this embodiment, the base frame 10 is manufactured using a one-piece die-casting process. Its interior is used to house components such as the diaphragm and light source. The glass cover plate 40 is placed on the base frame 10 to form a vehicle-mounted screen. The base frame 10 has a frame 11, and the top surface of the frame 11 has multiple adhesive overflow grooves 12. These grooves are evenly distributed around the frame 11, with at least two grooves 12 positioned opposite each other on either side of the frame 11, i.e., the top and bottom or left and right sides of the frame 11. The depth of the adhesive overflow grooves 12 is 0.1mm to 0.5mm. The grooves 12 can accommodate the adhesive between the glass cover plate 40 and the backlight during the pressing process. When the glass cover plate 40 is pressed onto the base frame 10, the adhesive is squeezed and flows into the adhesive overflow grooves 12, effectively controlling the flow path of the adhesive and reducing the impact of adhesive overflow on the product's appearance and performance. Simultaneously, it ensures the thickness stability of the product after pressing, avoiding thickness deviations caused by uneven adhesive application, thus improving production yield and user experience.

[0024] Specifically, each adhesive overflow groove 12 is provided with at least one limiting boss 20, so that when the glass cover plate 40 is placed on the limiting boss 20, a uniform gap is formed between the glass cover plate 40 and the top surface of the frame 11, avoiding over-pressing or under-pressing. By forming a gap, the limiting boss 20 ensures that the adhesive can be evenly distributed under pressure, while preventing excessive adhesive overflow. Due to the existence of the gap, the contact area between the adhesive and the backlight and the glass cover plate 40 is relatively fixed, which ensures the adhesiveness and avoids adhesive overflow. The product thickness dimension is more stable, reducing the risk of poor adhesion. The limiting boss 20 extends along the length direction of the frame 11, thereby increasing the support surface area and ensuring a more stable adhesion.

[0025] In some embodiments, the cross-sectional profile of the limiting boss 20 along the thickness direction of the bottom frame 10 is rectangular. The rectangular limiting boss 20 is less prone to deformation or wear during the pressing process. At the same time, the simple structure of the limiting boss 20 facilitates processing and molding, reducing production costs.

[0026] In some embodiments, at least one sidewall of the limiting boss 20 is located on the same vertical plane as the inner sidewall of the frame 11. That is, from a top view, the inner edge of the limiting boss 20 is flush with the inner edge of the frame 11. By positioning the limiting boss 20 close to the inner side of the bottom frame 10, the stability of the cover plate when placed on the limiting boss 20 is ensured.

[0027] In some embodiments, the limiting boss 20 is made of plastic, rubber, or silicone. When integrally molded, the limiting boss 20 can be made of plastic; during later installation, it can be made of rubber or silicone to provide support and elasticity to the glass cover 40.

[0028] In some embodiments, the top surface of the bottom frame 10 is further provided with a limiting outer edge 30 for preventing glue overflow. The limiting outer edge 30 protrudes upward and surrounds the frame 11. The height of the top surface of the limiting outer edge 30 is less than the height of the top surface of the limiting boss 20. The limiting outer edge 30 serves as a second layer of glue overflow prevention barrier, preventing glue from overflowing to the outside of the bottom frame 10, further controlling the flow path of the glue, and preventing glue from contaminating other parts of the equipment.

[0029] In some embodiments, the limiting outer edge 30 is provided with several glue injection pinholes 31. After the glass cover plate 40 is placed, glue can be injected into the gap between the glass cover plate 40 and the backlight through the glue injection pinholes 31 to ensure that the glue is filled evenly, and to facilitate further glue filling by the processing personnel when the glue is insufficient or needs to be adjusted.

[0030] In some embodiments, the top surface of the limiting boss 20 is inclined towards the inside of the bottom frame 10. The inclined surface gradually decreases from the outside to the inside, forming a slope. This further guides the adhesive to flow inward and reduces adhesive overflow.

[0031] In some embodiments, the limiting boss 20 is disposed in the middle of the glue overflow groove 12. This ensures that the glue overflow groove 12 can more evenly contain the glue.

[0032] This application also proposes a vehicle-mounted screen, including the backlight frame limiting structure, adhesive 50, and glass cover plate 40 as described above. The glass cover plate 40 is disposed on the backlight frame limiting structure and mounted on the limiting boss 20. The adhesive 50 is disposed between the glass cover plate 40 and the backlight frame limiting structure. The beneficial effects of this embodiment have been described in the relevant description of the backlight frame limiting structure and will not be repeated here.

[0033] In some embodiments, the glass cover plate 40 is provided with a limiting groove corresponding to the limiting protrusion 20. By providing the limiting groove, the glass cover plate 40 can be placed more smoothly in the backlight, which facilitates the pasting of the glass cover plate 40.

[0034] This application provides a certain space for the flow of adhesive by setting a limiting boss on the top surface of the frame. When the glass cover is pasted and fixed on the backlight, the glass cover can only be placed on the limiting boss because the height of the limiting boss is higher than the top surface of the frame. This ensures that when the glass cover and the backlight are connected by adhesive, the adhesive has a certain thickness, thus ensuring the bonding effect.

[0035] 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 frame limiting structure, characterized in that, include: A bottom frame, on which a border is provided, and a plurality of glue overflow grooves are provided on the top surface of the border. The glue overflow grooves are distributed around the border, and at least two of the glue overflow grooves are distributed opposite to each other on both sides of the border. A limiting boss is provided in the overflow groove. The top surface height of the limiting boss is greater than the top surface height of the frame so that a gap is formed when the cover plate is placed on the limiting boss.

2. The backlight frame limiting structure according to claim 1, characterized in that, Along the thickness direction of the bottom frame, the cross-sectional profile of the limiting boss is rectangular.

3. The backlight frame limiting structure according to claim 1, characterized in that, At least one side wall of the limiting boss is located on the same vertical plane as the inner side wall of the frame.

4. The backlight frame limiting structure according to claim 1, characterized in that, The limiting boss is made of one of the following materials: plastic, rubber, or silicone.

5. The backlight frame limiting structure according to claim 1, characterized in that, The top surface of the bottom frame is also provided with a limiting outer edge for preventing glue overflow. The limiting outer edge protrudes upward and is arranged around the frame. The height of the top surface of the limiting outer edge is less than the height of the top surface of the limiting boss.

6. The backlight frame limiting structure according to claim 5, characterized in that, The outer edge of the limiting device is provided with several injection pinholes.

7. The backlight frame limiting structure according to claim 1, characterized in that, The top surface of the limiting boss is inclined toward the inside of the bottom frame.

8. The backlight frame limiting structure according to claim 1, characterized in that, The limiting boss is located in the middle of the overflow groove.

9. A vehicle-mounted screen, characterized in that, The backlight frame limiting structure as described in any one of claims 1-8, adhesive, and a glass cover plate, wherein the glass cover plate is disposed on the backlight frame limiting structure and mounted on the limiting protrusion, and the adhesive is disposed between the glass cover plate and the backlight frame limiting structure.

10. The vehicle-mounted screen according to claim 9, characterized in that, The glass cover plate is provided with a limiting groove corresponding to the limiting boss.

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