Middle frame fixing structure and ceiling screen backlight module

Abstract

The utility model relates to a middle frame fixing structure and a ceiling screen backlight module, the middle frame fixing structure comprises a bottom plate and a middle frame, the middle frame is embedded in a limiting groove in the outer side edge of a mounting groove through a limiting block on the middle frame, and a limiting column in the limiting groove is embedded in a limiting hole in the limiting block; the built-in clamping blocks on the outer side surface of the middle frame are clamped in the built-in clamping grooves in the side walls of the mounting grooves, the middle frame can be limited and fixed in the X-axis direction, the Y-axis direction and the Z-axis direction, the middle frame can be stably mounted on the bottom plate, the situation that the middle frame is loosened and falls off from the bottom frame due to deformation and infirm fixing can be avoided, and the service life of the middle frame is prolonged. Therefore, the light guide plate can be well fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal backlight, in particular to a middle frame fixing structure and a ceiling screen backlight module. Background Art

[0002] At present, LED backlight technology is widely used in in-vehicle instrument displays because of its long service life and low power consumption. Common backlight modules are made by fixing and welding LED flexible circuit boards on one or both sides of a light guide plate. When the light beam emitted by the LED passes through the sawtooth mesh and cylindrical dots on the light guide plate, it will be evenly distributed on the light guide plate to realize the display of the car instrument panel.

[0003] In the existing ceiling screen backlight module, the light guide plate is installed in the bottom frame. Due to its large size and heavy weight, it is greatly affected by gravity when in use. At the same time, the gravity also acts on the middle frame, which can easily cause the middle frame to deform and become loose and fall off from the bottom frame due to poor fixation, making it impossible to fix the light guide plate well. Utility Model Content

[0004] Based on this, it is necessary to provide a middle frame fixing structure and a ceiling screen backlight module.

[0005] The utility model solves the above technical problems with the following technical solutions: a middle frame fixing structure, comprising:

[0006] A bottom plate, wherein a mounting groove is formed on the bottom plate, a plurality of limit grooves are formed on the outer edge of the mounting groove, a limit column is arranged in each of the limit grooves, and a plurality of built-in card slots are formed on the side wall of the mounting groove;

[0007] The middle frame is arranged on the bottom plate, and a plurality of limit blocks are arranged on the middle frame, each of the limit blocks is provided with a limit hole, each of the limit blocks is arranged in a limit groove, and each of the limit columns is embedded in a limit hole, and a plurality of built-in card blocks are arranged on the outer surface of the middle frame, and each of the built-in card blocks is engaged in a built-in card slot.

[0008] In one embodiment, a snap-fit ​​block is provided on the middle frame, a limiting buckle is provided on the snap-fit ​​block, a snap-fit ​​groove is provided on the bottom plate, a limiting buckle block is provided in the snap-fit ​​groove, the snap-fit ​​block is provided in the snap-fit ​​groove, and the limiting buckle block is engaged in the limiting buckle.

[0009] In one embodiment, the middle frame fixing structure further includes: a first adhesive layer, a first surface of the first adhesive layer is connected to the side wall of the limiting groove, and a second surface of the first adhesive layer is connected to the limiting block.

[0010] In one embodiment, the middle frame fixing structure further includes: a second adhesive layer, a first surface of the second adhesive layer is connected to the side wall of the mounting groove, and a second surface of the second adhesive layer is connected to the outer surface of the middle frame.

[0011] In one embodiment, the middle frame fixing structure further includes: a third adhesive layer, a first surface of the third adhesive layer is connected to the bottom of the mounting groove, and a second surface of the third adhesive layer is connected to a surface of the middle frame facing the bottom plate.

[0012] In one embodiment, a plurality of engaging notches are formed on the outer edge of the installation slot, and each of the engaging notches is aligned with one of the built-in slots.

[0013] In one embodiment, each of the limit blocks and each of the built-in card blocks are sequentially arranged on the middle frame at intervals.

[0014] In one embodiment, the middle frame fixing structure also includes: a light guide plate, the light guide plate is arranged in the installation groove, the middle frame is movably abutted against the edges of the light guide plate, a limiting boss is arranged on the light guide plate, a limiting opening is opened on the middle frame, and the limiting boss is embedded in the limiting opening.

[0015] In one embodiment, the middle frame fixing structure further includes: a foam adhesive layer, wherein the foam adhesive layer is disposed on the middle frame and the foam adhesive layer closes the limiting opening.

[0016] The utility model also provides a ceiling screen backlight module, comprising the middle frame fixing structure described in any one of the above embodiments.

[0017] The beneficial effects of the utility model are as follows: a middle frame fixing structure provided by the utility model, through the limit block on the middle frame being embedded in the limit groove on the outer edge of the installation groove, and the limit column in the limit groove being embedded in the limit hole on the limit block, and the built-in clamping block on the outer surface of the middle frame being clamped in the built-in clamping groove on the side wall of the installation groove, the middle frame can be limited and fixed in the X-axis, Y-axis and Z-axis directions, the middle frame can be stably installed on the bottom plate, and deformation of the middle frame and loose fixation resulting in loosening and falling off from the bottom frame can be avoided, so that the light guide plate can be well fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic structural diagram of a middle frame fixing structure according to an embodiment;

[0020] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 3 is a schematic structural diagram of a middle frame and a light guide plate of an embodiment;

[0022] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0023] In the accompanying drawings, 10, middle frame fixing structure; 100, bottom plate; 101, mounting groove; 110, limiting groove; 111, limiting column; 120, built-in card slot; 121, locking notch; 130, first adhesive layer; 200, middle frame; 210, limiting block; 211, limiting hole; 220, built-in card block; 230, limiting mouth; 300, buckle block; 310, limiting buckle; 400, buckle groove; 410, limiting card block; 500, light guide plate; 510, limiting boss. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The technical solution of the present invention will be further described below in conjunction with the drawings of the embodiments of the present invention, and the present invention is not limited to the following specific implementation methods.

[0025] It should be understood that the same or similar numbers in the drawings of the embodiments correspond to the same or similar parts. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom" and the like indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] In one embodiment, Figure 1 and Figure 2As shown, a middle frame fixing structure 10 comprises: a bottom plate 100 and a middle frame 200, the bottom plate 100 is provided with a mounting groove 101, a plurality of limiting grooves 110 are provided on the outer edge of the mounting groove 101, a limiting column 111 is provided in each of the limiting grooves 110, a plurality of built-in card slots 120 are provided on the side wall of the mounting groove 101, the middle frame 200 is arranged on the bottom plate 100, a plurality of limiting blocks 210 are provided on the middle frame 200, a limiting hole 211 is provided on each of the limiting blocks 210, each of the limiting blocks 210 is arranged in one of the limiting grooves 110, and each of the limiting columns 111 is embedded in one of the limiting holes 211, a plurality of built-in card blocks 220 are provided on the outer surface of the middle frame 200, and each of the built-in card blocks 220 is engaged in one of the built-in card slots 120.

[0027] In this embodiment, each limiting groove 110 is evenly distributed on the outer edge of the mounting groove 101, each built-in card slot 120 is evenly distributed on the side wall of the mounting groove 101, each limiting groove 110 and each built-in card slot 120 are sequentially spaced and distributed on the bottom plate 100, each limiting block 210 and each built-in card block 220 are sequentially spaced and arranged on the middle frame 200, and the limiting block 210 on the middle frame 200 is embedded in the limiting groove 110 on the outer edge of the mounting groove 101, and the limiting column 111 in the limiting groove 110 is embedded in the limiting hole 21 on the limiting block 210. 1, the built-in card block 220 on the outer surface of the middle frame 200 is engaged in the built-in card slot 120 on the side wall of the installation slot 101, so that the middle frame 200 can be limited and fixed in the X-axis, Y-axis and Z-axis directions, that is, the movement of the middle frame 200 in the X-axis, Y-axis and Z-axis directions can be limited, and the gravity on the middle frame 200 can be dispersed. The middle frame 200 can be stably installed on the bottom plate 100, and the deformation of the middle frame 200 and the loosening and falling off from the bottom frame caused by the loose fixation can be avoided, so that the light guide plate 500 can be well fixed.

[0028] In one embodiment, Figure 3 and Figure 4 As shown, the middle frame 200 is provided with a buckle block 300, and a limit buckle 310 is provided on the buckle block 300, and a buckle slot 400 is provided on the bottom plate 100, and a limit clamp block 410 is provided in the buckle slot 400, and the buckle block 300 is arranged in the buckle slot 400, and the limit clamp block 410 is engaged in the limit clamp 310. Specifically, the buckle block 300 is buckled in the buckle slot 400 by the limit clamp block 410 being engaged in the limit clamp 310, which can further limit the movement of the middle frame 200 in the Z-axis direction, so that the middle frame 200 can be better limited and fixed.

[0029] In one embodiment, Figure 2As shown, the middle frame fixing structure 10 further includes: a first adhesive layer 130, a first surface of the first adhesive layer 130 is connected to the side wall of the limiting groove 110, and a second surface of the first adhesive layer 130 is connected to the limiting block 210. Specifically, the first surface of the first adhesive layer 130 is connected to the bottom side wall of the limiting groove 110, and the first adhesive layer 130 can well fix the limiting block 210 in the limiting groove 110, that is, the middle frame 200 and the bottom plate 100 can be bonded together, and the middle frame 200 can be more stably installed on the bottom plate 100, which can avoid the situation of external deformation.

[0030] In one embodiment, the middle frame fixing structure 10 further includes: a second adhesive layer, a first surface of the second adhesive layer is connected to the side wall of the mounting groove 101, and a second surface of the second adhesive layer is connected to the outer surface of the middle frame 200. Specifically, the second adhesive layer can well bond the surrounding sides of the middle frame 200 to the side wall of the mounting groove 101, that is, the middle frame 200 can be glued and fixed to the side wall of the mounting groove 101, and the middle frame 200 can be well prevented from being loosened, so that the middle frame 200 can withstand a large gravity, and the light guide plate 500 can be better fixed.

[0031] In one embodiment, the middle frame fixing structure 10 further includes: a third adhesive layer, a first surface of the third adhesive layer is connected to the bottom of the mounting groove 101, and a second surface of the third adhesive layer is connected to a surface of the middle frame 200 facing the bottom plate 100. Specifically, the third adhesive layer can well bond the surface of the middle frame 200 facing the bottom plate 100 with the bottom of the mounting groove 101, that is, the middle frame 200 can be glued and fixed to the bottom of the mounting groove 101, and the middle frame 200 can be well glued and fixed to the bottom plate 100, so that the middle frame 200 can withstand a large gravity, thereby better fixing the light guide plate 500.

[0032] In one embodiment, Figure 2 As shown, a plurality of engaging notches 121 are provided on the outer edge of the installation slot 101, and each of the engaging notches 121 is aligned with one of the built-in slots 120. Specifically, each engaging notch 121 is spaced apart from one of the built-in slots 120, and the engaging notch 121 is located above the built-in slot 120. When the built-in card block 220 on the middle frame 200 is engaged with the built-in card slot 120, the built-in card block 220 can be better slidably engaged with the built-in card slot 120 through the engaging notch 121, so that the middle frame 200 can be installed on the bottom plate 100.

[0033] In one embodiment, Figure 3 and Figure 4As shown, the middle frame fixing structure 10 further includes: a light guide plate 500, the light guide plate 500 is arranged in the mounting groove 101, the middle frame 200 is movably abutted against the edges of the light guide plate 500, a limiting boss 510 is arranged on the light guide plate 500, a limiting opening 230 is provided on the middle frame 200, and the limiting boss 510 is embedded in the limiting opening 230. Specifically, the number of the limiting bosses 510 is set to be multiple, the number of the limiting bosses 510 is equal to the number of the limiting openings 230, and each limiting boss 510 is embedded in a limiting opening 230, which can further limit and fix the middle frame 200 to prevent the middle frame 200 from shifting and being pulled out.

[0034] In one embodiment, the middle frame fixing structure 10 further includes: a foam adhesive layer, which is disposed on the middle frame 200 and seals the limit opening 230. Specifically, the foam adhesive layer is attached to the side of the middle frame 200 away from the bottom plate 100 and is used to seal the limit opening 230 on the middle frame 200, thereby preventing foreign matter in the external environment from entering the interior of the ceiling screen backlight module through the limit opening 230 and affecting the display effect.

[0035] The utility model also provides a ceiling screen backlight module, including the middle frame fixing structure 10 described in any of the above embodiments. In this embodiment, the ceiling screen backlight module also includes a flexible circuit board, lamp beads, an optical film, etc. The lamp beads are electrically connected to the flexible circuit board, the lamp beads are aligned with one side of the light guide plate, and the optical film is arranged on the light guide plate. It should be understood that the ceiling screen backlight module may also include other components, which will not be described here in detail.

[0036] Compared with the prior art, the utility model has at least the following advantages:

[0037] The utility model provides a middle frame fixing structure, in which a limiting block on the middle frame is embedded in a limiting groove on the outer edge of the installation groove, and a limiting column in the limiting groove is embedded in a limiting hole on the limiting block, and a built-in clamping block on the outer surface of the middle frame is clamped in the built-in clamping groove on the side wall of the installation groove, so that the middle frame can be limited and fixed in the X-axis, Y-axis and Z-axis directions, the middle frame can be stably installed on the bottom plate, and deformation of the middle frame and loosening and falling off from the bottom frame due to loose fixation can be avoided, so that the light guide plate can be well fixed.

[0038] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A middle frame fixing structure, characterized in that: include: A bottom plate, wherein a mounting groove is formed on the bottom plate, a plurality of limit grooves are formed on the outer edge of the mounting groove, a limit column is arranged in each of the limit grooves, and a plurality of built-in card slots are formed on the side wall of the mounting groove; The middle frame is arranged on the bottom plate, and a plurality of limit blocks are arranged on the middle frame, each of the limit blocks is provided with a limit hole, each of the limit blocks is arranged in a limit groove, and each of the limit columns is embedded in a limit hole, and a plurality of built-in card blocks are arranged on the outer surface of the middle frame, and each of the built-in card blocks is engaged in a built-in card slot.

2. The middle frame fixing structure according to claim 1, characterized in that: A buckling block is provided on the middle frame, a limit buckle is provided on the buckling block, a buckling groove is provided on the bottom plate, a limit block is provided in the buckling groove, the buckling block is provided in the buckling groove, and the limit block is engaged in the limit buckle.

3. The middle frame fixing structure according to claim 1, characterized in that: Also includes: A first adhesive layer, wherein a first surface of the first adhesive layer is connected to a side wall of the limiting groove, and a second surface of the first adhesive layer is connected to the limiting block.

4. The middle frame fixing structure according to claim 3, characterized in that: Also includes: A second adhesive layer, wherein a first surface of the second adhesive layer is connected to the side wall of the mounting groove, and a second surface of the second adhesive layer is connected to the outer surface of the middle frame.

5. The middle frame fixing structure according to claim 4, characterized in that: Also includes: A third adhesive layer, wherein a first surface of the third adhesive layer is connected to the bottom of the mounting groove, and a second surface of the third adhesive layer is connected to a surface of the middle frame facing the bottom plate.

6. The middle frame fixing structure according to claim 1, characterized in that: A plurality of engaging notches are provided on the outer edge of the installation slot, and each of the engaging notches is aligned with one of the built-in slots.

7. The middle frame fixing structure according to claim 1, characterized in that: Each of the limit blocks and each of the built-in card blocks are sequentially arranged on the middle frame at intervals.

8. The middle frame fixing structure according to claim 1, characterized in that: Also includes: The light guide plate is arranged in the installation groove, the middle frame is movably abutted against the edges of the light guide plate, a limiting boss is arranged on the light guide plate, a limiting opening is provided on the middle frame, and the limiting boss is embedded in the limiting opening.

9. The middle frame fixing structure according to claim 8, characterized in that: Also includes: A foam adhesive layer is disposed on the middle frame, and the foam adhesive layer seals the limiting opening.

10. A ceiling screen backlight module, characterized in that: It comprises the middle frame fixing structure described in any one of claims 1 to 9.

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