Light guide plate fixing structure

Abstract

The utility model discloses a light guide plate fixing structure, which comprises a rubber frame, the surface of the rubber frame is provided with an accommodating cavity with an opening, the shape of the accommodating cavity is matched with that of a light guide plate, and the inner wall of the accommodating cavity is provided with an assembling hole site; the inserting part is arranged on the surface of the light guide plate; when the light guide plate is attached to the inner wall of the containing cavity, the assembling hole positions limit the inserted inserting parts to fix the light guide plate, the backlight light guide plate and the rubber frame can be buckled together through matching of the inserting parts and the assembling hole positions, the backlight light guide plate and the rubber frame can be prevented from falling out due to vibration, specifically, the light guide plate is directly guided to be attached to the inner wall of the containing cavity, and the backlight light guide plate is not prone to falling off. At the moment, the light guide plate is fixed by limiting the inserted inserting part through the assembling hole site.

Description

Technical Field

[0001] The utility model relates to the field of display screens, and in particular to a light guide plate fixing structure. Background Art

[0002] In the LCD screen, since the liquid crystal molecules themselves cannot emit light, the LCD screen needs to rely on external light sources to assist in emitting light. Usually, the LCD screen needs the help of a backlight source to achieve the display function. The backlight source is mainly composed of a light source, a light guide plate, an optical film, a plastic frame, etc.; it has the characteristics of high brightness, long life, and uniform light emission. Among them, the light guide plate is made of optical-grade acrylic / polycarbonate sheet, and then a high-tech material with extremely high reflectivity and no light absorption is used to print light guide points on the bottom of the optical-grade acrylic sheet using ultraviolet (Ultra-Violet Ray, referred to as UV) screen printing technology. The optical-grade acrylic sheet is used to absorb the light emitted from the light source and stay on the surface of the optical-grade acrylic sheet. When the light hits each light guide point, the reflected light will diffuse to all angles, and then destroy the reflection conditions and emit from the front of the light guide plate. Through various light guide points of different densities and sizes, the light guide plate can emit light evenly, that is, the line light source is converted into a surface light source.

[0003] In the prior art, such as the patent document with application number CN201420318302.9, a light guide plate is disclosed, which is an integrated light guide plate that optimizes the combination of a closed frame and a light guide plate body, wherein the closed frame plays the role of a rubber frame in the prior art. Therefore, in the process of producing the backlight source, there is no need to connect the light guide plate and the rubber frame by gluing, snapping, etc., which can reduce the complexity of backlight source assembly and save production time. At the same time, compared with gluing, snapping and other connection methods, the integrated connection method is more secure, thereby improving the assembly yield of the LCD screen and reducing the waste of raw materials caused by assembly failure, thereby reducing production costs.

[0004] The above patent document discloses a limiting solution for fixing the light guide plate, while in the prior art, Figure 1 , which adopts this limiting solution for fixing the light guide plate, but this technical solution still has limitations in actual operation, because when fixing the light guide plate, the middle frame and the iron frame are connected to fix the light guide plate so that the light guide plate is clamped (the above patent document adopts the clamping method), but the distance between the middle frame and the iron frame after connection is fixed, and the size of the light guide plate is sometimes slightly smaller than this distance. Once the light guide plate between the middle frame and the iron frame shakes, it is easy to fall out of this distance. Utility Model Content

[0005] Based on this, it is necessary to provide a light guide plate fixing structure to address the above technical issues.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A light guide plate fixing structure, comprising:

[0008] A plastic frame, the surface of which is provided with a receiving cavity with an opening, the shape of the receiving cavity matches the shape of the light guide plate, and the inner wall of the receiving cavity is provided with an assembly hole;

[0009] The plug-in portion is disposed on the surface of the light guide plate;

[0010] When the light guide plate is fitted with the inner wall of the accommodating cavity, the assembly hole positions limit the inserted plug-in portion to fix the light guide plate.

[0011] Furthermore, the assembly hole and the plug-in portion are fitted through interference, transition or clearance.

[0012] Furthermore, the light guide plate has a light guide area and an edge area, the edge area is located outside the light guide area, and the plug-in portion is arranged in the edge area.

[0013] Furthermore, when the assembly hole and the plug-in portion are in transition or clearance fit;

[0014] The plug-in portion includes a connecting portion connected to the surface of the light guide plate, and an end of the connecting portion away from the light guide plate has an edge portion. When the plug-in portion is inserted into the assembly hole, the side wall of the edge portion abuts against the edge of the assembly hole.

[0015] Furthermore, an end surface of the edge portion away from the connecting portion is provided with an inclined surface, and the width of the edge portion is greater than the width of the assembly hole.

[0016] Furthermore, when the assembly hole and the plug-in portion are in transition or clearance fit;

[0017] A avoidance groove is provided on a surface of one side of the glue rack opposite to the opening, the avoidance groove corresponds to the assembly hole, and the plug-in portion can be inserted into the assembly hole and extend into the avoidance groove.

[0018] Furthermore, the width and thickness of the avoidance groove are at least equal to the width of the end of the plug-in portion away from the light guide plate.

[0019] Furthermore, when the assembly hole and the plug-in portion are in interference fit;

[0020] One end of the plug-in portion away from the light guide plate has a clamping groove, and an extrusion block is movably connected in the clamping groove. When the extrusion block is pressed into the clamping groove, the surface of the plug-in portion abuts against the inner wall of the assembly hole.

[0021] Furthermore, when the extrusion block is not pressed into the positioning slot, the width of the plug-in portion is not greater than the width of the assembly hole; when the extrusion block is pressed into the positioning slot, the width of the plug-in portion is not less than the width of the assembly hole.

[0022] Furthermore, the inner side wall of the positioning groove is provided with a locking groove, and the side wall of the extrusion block is provided with a protrusion adapted to the locking groove.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The utility model can buckle the backlight guide plate and the rubber frame together through the cooperation of the plug-in part and the assembly hole, so as to avoid falling out due to vibration. Specifically, the light guide plate is directly guided to fit with the inner wall of the accommodating cavity. At this time, the assembly hole limits the inserted plug-in part to fix the light guide plate.

[0025] The edge portion will extend out of the assembly hole, causing the surface of the rubber frame on the side opposite to the opening to be uneven, so an avoidance groove is provided so that the plug-in portion will extend into the avoidance groove after being inserted into the assembly hole, so that there will be no large unevenness on the surface of the rubber frame on the side opposite to the opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a glue rack in the prior art;

[0027] Figure 2 A schematic diagram of the structure of the plug-in portion provided by the utility model;

[0028] Figure 3 A schematic diagram of the assembly hole structure provided by the utility model;

[0029] Figure 4 This is a schematic diagram of the structure when the plug-in portion and the assembly hole are plugged in the second embodiment of the utility model;

[0030] Figure 5 This is a schematic diagram of the structure when the plug-in portion and the assembly hole are plugged in the third embodiment of the present utility model;

[0031] Figure 6 This is a schematic diagram of the structure when the plug-in portion and the assembly hole are plugged in the fourth embodiment of the utility model;

[0032] Figure 7 This is a schematic diagram of the extrusion block structure provided by the utility model.

[0033] The markings in the figure are as follows:

[0034] 1. Glue rack; 2. Accommodating cavity; 3. Assembly hole; 4. Plug-in portion; 5. Light guide area; 6. Edge area; 7. Connecting portion; 8. Edge portion; 9. Inclined surface; 10. Avoidance groove; 11. Positioning groove; 12. Extrusion block; 13. Slot; 14. Protrusion. DETAILED DESCRIPTION

[0035] 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.

[0036] The light guide area is the VA area in the light guide plate, which refers to the area on the light guide plate that uses VA technology. The design of this specific area can help improve the contrast and viewing angle of the LCD display, making the image clearer and fuller at different angles. The VA area is usually located in the central area of ​​the LCD screen, making the visual effect of the entire display better.

[0037] As described in the background art, the distance between the middle frame and the iron frame after connection is fixed, and the size of the light guide plate is sometimes slightly smaller than this distance. Once the light guide plate between the middle frame and the iron frame shakes, it is easy to fall out of this distance.

[0038] In order to solve this technical problem, the utility model provides a light guide plate fixing structure.

[0039] Specifically, please refer to Figure 1-7 , a light guide plate fixing structure, comprising:

[0040] A plastic frame 1 has a surface provided with a receiving cavity 2 with an opening, the shape of the receiving cavity 2 matches the shape of the light guide plate, and the inner wall of the receiving cavity 2 is provided with an assembly hole 3; a plug-in portion 4 is arranged on the surface of the light guide plate; when the light guide plate is fitted with the inner wall of the receiving cavity 2, the assembly hole 3 limits the inserted plug-in portion 4 to fix the light guide plate.

[0041] The utility model can make the backlight guide plate and the rubber frame 1 buckle together through the cooperation of the plug-in part 4 and the assembly hole 3 to avoid falling out due to vibration. Specifically, the light guide plate is directly guided to fit with the inner wall of the accommodating cavity 2. At this time, the assembly hole 3 limits the inserted plug-in part 4 to fix the light guide plate.

[0042] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0045] Example 1

[0046] The light guide plate fixing structure includes: a glue frame 1, a surface of which is provided with a receiving cavity 2 with an opening, the shape of the receiving cavity 2 matches the shape of the light guide plate, and the inner wall of the receiving cavity 2 is provided with an assembly hole 3; a plug-in portion 4, which is arranged on the surface of the light guide plate; when the light guide plate is fitted with the inner wall of the receiving cavity 2, the assembly hole 3 limits the inserted plug-in portion 4 to fix the light guide plate.

[0047] Generally, at least two assembly holes 3 are provided, such as Figure 3 The setting position of the plug-in portion 4 on the light guide plate corresponds to the setting position of the assembly hole 3 on the inner wall of the accommodating cavity 2 .

[0048] The assembly hole 3 can be set on the side wall of the accommodating cavity 2 (that is, the plug-in portion 4 is set on the side wall around the light guide plate), or on the bottom inner wall of the accommodating cavity 2. In the present application, it is preferably set on the bottom inner wall of the accommodating cavity 2.

[0049] In some embodiments, the assembly hole 3 and the plug-in portion 4 are matched by interference fit, transition fit, or clearance fit so as to enable the assembly hole 3 and the plug-in portion 4 to be plugged in smoothly.

[0050] In some embodiments, the light guide plate has a light guide area 5 and an edge area 6, the edge area 6 is located outside the light guide area 5, and the plug-in portion 4 is disposed in the edge area 6. This arrangement is to prevent the light guide area 5 from being affected by the plug-in portion 4.

[0051] Example 2

[0052] The light guide plate fixing structure provided in Example 1 is further optimized, when the assembly hole 3 and the plug-in portion 4 are in transition or clearance fit;

[0053] The plug-in portion 4 includes a connecting portion 7 connected to the surface of the light guide plate (the general connection method can be bonding, or the connecting portion 7 and the surface of the light guide plate are integrally formed), and the connecting portion 7 has an edge portion 8 at one end away from the light guide plate. When the plug-in portion 4 is inserted into the assembly hole 3, the side wall of the edge portion 8 abuts against the edge of the assembly hole 3.

[0054] Please refer to Figure 2-4When the plug-in portion 4 is plugged into the assembly hole 3, the connecting portion 7 will be inserted into the assembly hole 3 and extend out of the assembly hole 3. At this time, the side wall of the edge portion 8 abuts against the edge of the assembly hole 3 to complete the plug-in of the plug-in portion 4 and the assembly hole 3. At the same time, due to the restriction of the edge portion 8, the connecting portion 7 will not easily detach from the assembly hole 3, which means that the light guide plate and the rubber frame 1 are plugged in.

[0055] In some embodiments, an end surface of the edge portion 8 away from the connecting portion 7 is provided with an inclined surface 9 , and the width of the edge portion 8 is greater than the width of the assembly hole 3 .

[0056] In the present application, the plug-in portion 4 can be made of rubber material or elastic plastic or other materials, so that the plug-in portion 4 can be smoothly inserted into the assembly hole 3.

[0057] Example 3

[0058] The light guide plate fixing structure provided in embodiment 1 or 2 is further optimized, and the light guide plate fixing structure includes:

[0059] A plastic frame 1 has a surface provided with a receiving cavity 2 with an opening, the shape of the receiving cavity 2 matches the shape of the light guide plate, and the inner wall of the receiving cavity 2 is provided with an assembly hole 3; a plug-in portion 4 is arranged on the surface of the light guide plate; when the light guide plate is fitted with the inner wall of the receiving cavity 2, the assembly hole 3 limits the inserted plug-in portion 4 to fix the light guide plate.

[0060] The utility model can make the backlight guide plate and the rubber frame 1 buckle together through the cooperation of the plug-in part 4 and the assembly hole 3 to avoid falling out due to vibration. Specifically, the light guide plate is directly guided to fit with the inner wall of the accommodating cavity 2. At this time, the assembly hole 3 limits the inserted plug-in part 4 to fix the light guide plate.

[0061] When the assembly hole 3 and the plug-in portion 4 are in transition or clearance fit;

[0062] A side surface of the plastic frame 1 opposite to the opening is provided with an avoidance groove 10 , which corresponds to the assembly hole 3 , and the plug-in portion 4 can be inserted into the assembly hole 3 and extend into the avoidance groove 10 .

[0063] The edge portion 8 will extend out of the assembly hole 3, resulting in an uneven surface on the side of the plastic frame 1 opposite to the opening, so an avoidance groove 10 is provided. Figure 5 , so that the plug-in portion 4 will extend into the avoidance groove 10 after being inserted into the assembly hole 3, so that there will be no large unevenness on the surface of the side of the rubber frame 1 opposite to the opening

[0064] In some embodiments, the width and thickness of the avoidance groove 10 are at least equal to the width of the end of the plug-in portion 4 away from the light guide plate.

[0065] This arrangement is to prevent the plug-in portion 4 from being exposed in the avoidance groove 10 at one end away from the light guide plate.

[0066] Example 4

[0067] The light guide plate fixing structure provided in the above embodiments is further optimized, when the assembly hole 3 and the plug-in portion 4 are in interference fit;

[0068] One end of the plug-in portion 4 away from the light guide plate has a locking groove 11 , in which a pressing block 12 is movably connected. When the pressing block 12 is pressed into the locking groove 11 , the surface of the plug-in portion 4 abuts against the inner wall of the assembly hole 3 .

[0069] After the plug-in part 4 is inserted into the assembly hole 3, the extrusion block 12 is pressed into the locking groove 11, and then the plug-in part 4 will expand, so that the surface of the plug-in part 4 abuts against the inner wall of the assembly hole 3. In this way, the friction between the plug-in part 4 and the inner wall of the assembly hole 3 can be greater, and the plug-in part 4 and the assembly hole 3 will not easily slip.

[0070] In some embodiments, when the extrusion block 12 is not pressed into the positioning groove 11, the width of the plug-in portion 4 is not greater than the width of the assembly hole 3. This operation is to make it easier for the plug-in portion 4 to insert into the assembly hole 3; when the extrusion block 12 is pressed into the positioning groove 11, the width of the plug-in portion 4 is not less than the width of the assembly hole 3. This operation is to achieve an interference fit between the assembly hole 3 and the plug-in portion 4.

[0071] In some embodiments, a locking groove 13 is provided on the inner side wall of the locking groove 11 , and a protrusion 14 adapted to the locking groove 13 is provided on the side wall of the extrusion block 12 .

[0072] When the extrusion block 12 is inserted into the locking slot 11 , the protrusion 14 on the side wall of the extrusion block 12 will be embedded in the locking slot 13 and adapted to the locking slot 13 , so that the extrusion block 12 will not be easily separated from the locking slot 11 .

[0073] The use process of the light guide plate fixing structure provided by the utility model is as follows: the utility model can make the backlight light guide plate and the rubber frame 1 buckle together through the cooperation of the plug-in part 4 and the assembly hole 3, so as to avoid falling out due to vibration. Specifically, the light guide plate is directly guided to fit with the inner wall of the accommodating cavity 2. At this time, the assembly hole 3 limits the inserted plug-in part 4 to fix the light guide plate.

[0074] 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.

[0075] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model 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 utility model more thorough and comprehensive. Although the utility model 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 replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A light guide plate fixing structure, characterized in that: include: A glue frame (1) having a surface provided with a receiving cavity (2) with an opening, the shape of the receiving cavity (2) matching the shape of the light guide plate, and an inner wall of the receiving cavity (2) provided with an assembly hole (3); An inserting portion (4) which is arranged on the surface of the light guide plate; When the light guide plate is fitted onto the inner wall of the accommodating cavity (2), the assembly hole (3) fixes the light guide plate by limiting the inserted plug-in portion (4).

2. The light guide plate fixing structure according to claim 1, characterized in that: The assembly hole (3) and the plug-in portion (4) are fitted through interference, transition or clearance.

3. The light guide plate fixing structure according to claim 2, characterized in that: The light guide plate comprises a light guide area (5) and an edge area (6), the edge area (6) is located outside the light guide area (5), and the plug-in portion (4) is arranged in the edge area (6).

4. The light guide plate fixing structure according to claim 2 or 3, characterized in that: When the assembly hole (3) and the plug-in portion (4) are in transition or clearance fit; The plug-in portion (4) comprises a connecting portion (7) connected to the surface of the light guide plate, and an end of the connecting portion (7) away from the light guide plate has an edge portion (8), and when the plug-in portion (4) is inserted into the assembly hole (3), the side wall of the edge portion (8) abuts against the edge of the assembly hole (3).

5. The light guide plate fixing structure according to claim 4, characterized in that: An inclined surface (9) is provided on an end surface of the edge portion (8) away from the connecting portion (7), and the width of the edge portion (8) is greater than the width of the assembly hole (3).

6. The light guide plate fixing structure according to claim 2 or 3, characterized in that: When the assembly hole (3) and the plug-in portion (4) are in transition or clearance fit; A avoidance groove (10) is provided on a surface of one side of the rubber frame (1) opposite to the opening, the avoidance groove (10) corresponds to the assembly hole (3), and the plug-in portion (4) can be inserted into the assembly hole (3) and extend into the avoidance groove (10).

7. The light guide plate fixing structure according to claim 6, characterized in that: The width and thickness of the avoidance groove (10) are at least equal to the width of the end of the plug-in portion (4) away from the light guide plate.

8. The light guide plate fixing structure according to claim 2 or 3, characterized in that: When the assembly hole (3) and the plug-in portion (4) are in interference fit; An end of the plug-in portion (4) away from the light guide plate has a locking groove (11), and an extrusion block (12) is movably connected in the locking groove (11); when the extrusion block (12) is pressed into the locking groove (11), the surface of the plug-in portion (4) abuts against the inner side wall of the assembly hole (3).

9. The light guide plate fixing structure according to claim 8, characterized in that: When the extrusion block (12) is not pressed into the locking groove (11), the width of the plug-in portion (4) is not greater than the width of the assembly hole (3); when the extrusion block (12) is pressed into the locking groove (11), the width of the plug-in portion (4) is not less than the width of the assembly hole (3).

10. The light guide plate fixing structure according to claim 8, characterized in that: The inner side wall of the locking groove (11) is provided with a locking groove (13), and the side wall of the extrusion block (12) is provided with a protrusion (14) adapted to the locking groove (13).

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