Light guide plate for backlight source

Abstract

The utility model relates to the technical field of light guide plates, in particular to a light guide plate for a backlight source, which comprises a support and a light guide plate body in the support, a mounting portion is rotatably connected to the side edge of one end of the support through a fixing assembly, and a light-emitting part is detachably connected to the side face of the mounting portion through a positioning structure. According to the light guide plate, the installation part is fixed in the mode that the unlocking part is matched with the compressed spring to be inserted into the clamping groove, the installation part can be unlocked in the mode that the unlocking part slides, the inner side face of the installation part is detachably connected with the light-emitting part through the positioning mechanism, and the light-emitting part and the light guide plate body are matched for use. The first positioning piece and the mounting part can be detached together with the second positioning piece and the light-emitting piece in a separated mode, or the first positioning piece and the second positioning piece are detached, the light-emitting piece can be detached independently, the detaching time is effectively shortened, and practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of light guide plate technology, and in particular to a light guide plate for a backlight. Background Technology

[0002] The backlight light guide plate is a key component in liquid crystal display (LCD) technology. It is located on the back of the LCD screen. The main function of the backlight light guide plate is to distribute the light emitted by the backlight (usually LED or cold cathode fluorescent lamp) evenly across the entire LCD panel, thereby improving the display effect.

[0003] When light emitted from a backlight shines onto a light guide plate, the light undergoes multiple reflections within the light guide plate. Therefore, the light guide plate needs to be used in conjunction with a backlight. For example, Chinese Patent Publication No. CN205539559U discloses a light guide plate comprising: an incident surface; a bottom surface intersecting the incident surface; and an emitting surface opposite to the bottom surface. The emitting surface includes a main body area, a thickness adaptation area, and an inclined area connecting the main body area and the thickness adaptation area; and a microprism structure disposed in the inclined area. Because of the microprism structure in the inclined area, the light originally refracted into the air from the inclined area is redirected back onto the light guide plate. Through the action of the light guide plate and other components, the light is finally emitted from the main body area of ​​the light guide plate, thereby improving light utilization. This utility model also discloses a backlight.

[0004] The existing technology disclosed in Chinese Patent Publication No. CN214501112U is an LED backlight light guide plate. The key technical points of the solution are: it includes a light guide plate fixing frame and a lamp source base. A light guide plate assembly is set inside the light guide plate fixing frame. A reflective layer is set at the lower end of the light guide plate assembly. A lamp source fixing plate is set at the upper end of the lamp source base at the position corresponding to the reflective layer. Multiple LED lamp sources are set at the upper end of the lamp source fixing plate. The multiple LED lamp sources are evenly arranged.

[0005] In practice, the light source is set on the base to provide light to the light guide plate. However, it is not convenient to disassemble and replace the light source and the base. After a long period of use, the disassembly and assembly time is extended due to the difficulty in disassembling and replacing the light guide plate and the light source, resulting in poor practicality. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies, such as the inconvenience of disassembling and replacing the light source and the base, and to propose a light guide plate for a backlight.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] Design a light guide plate for a backlight, including a bracket and a light guide plate body inside it. A mounting part is rotatably connected to one side of the bracket via a fixing component. A light-emitting element is detachably connected to the side of the mounting part via a positioning structure. The light-emitting element is used in conjunction with the light guide plate body.

[0009] Furthermore, the fixing component includes an unlocking member. The bracket has a sliding groove on its inner side near the side opening. The unlocking member is slidably connected to the sliding groove by a compression spring. The middle end of the sliding groove connects to the bracket to form a guide groove. The unlocking member has a T-shaped structure, and its protruding part is slidably connected to the guide groove.

[0010] Furthermore, the mounting part has an L-shaped structure, and its bent portion is rotatably connected to the bracket via a pivot and a torsion spring. The end of the mounting part opposite to the pivot is inserted and fixed to the unlocking component via a slot.

[0011] Furthermore, the positioning structure includes a pair of legs and a first positioning part. The pair of legs are L-shaped and fixed to each other on the inner side of the mounting part. The bottom sides of the first positioning part are bent inward to form a first connecting part, which is inserted into and abutted against the pair of legs.

[0012] Furthermore, it also includes a second positioning part having an upwardly extending extension on both sides of the top of the first positioning part. The free end of the extension is bent outward to form a second connecting part. The second positioning part has a U-shaped structure, and a third connecting part is provided at both ends of the bending point to be inserted into and abut against the second connecting part.

[0013] Furthermore, the light-emitting element is fixed between the second positioning part and the first positioning part, and the second positioning part avoids the light-emitting surface of the light-emitting element through the side clearance groove.

[0014] The light guide plate for a backlight proposed in this utility model has the following advantages: the mounting part is fixed by means of unlocking component and spring-loaded slot, and the mounting part can be unlocked by means of sliding unlocking component. The light-emitting component is detachably connected to the inner side of the mounting part by means of positioning mechanism. The first positioning component can be separated from the mounting part and disassembled together with the second positioning component and the light-emitting component, or the first positioning component and the second positioning component can be disassembled separately, and the light-emitting component can be disassembled separately, which effectively reduces disassembly and assembly time and is highly practical. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the positioning structure of this utility model;

[0017] Figure 3 for Figure 2 A magnified structural diagram of area A;

[0018] Figure 4 This is a cross-sectional view of the fixing component of this utility model;

[0019] Figure 5 for Figure 4 A magnified structural diagram of region B.

[0020] In the diagram: 1. Bracket; 11. Guide groove; 2. Light guide plate body; 3. Fixing component; 31. Unlocking component; 32. Compression spring; 33. Rotating shaft; 4. Mounting part; 41. Slot; 5. Positioning structure; 51. Support leg; 52. First positioning part; 521. First connecting part; 522. Second connecting part; 53. Second positioning part; 531. Third connecting part; 6. Light-emitting component. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-5 A light guide plate for a backlight includes a bracket 1 and a light guide plate body 2 inside it. A mounting part 4 is rotatably connected to one side of the bracket 1 via a fixing component 3. A light-emitting element 6 is detachably connected to the side of the mounting part 4 via a positioning structure 5. The light-emitting element 6 is used in conjunction with the light guide plate body 2.

[0023] It should be added that an optical film and a reflective sheet are respectively provided on the light-emitting surface and the reflective surface of the light guide plate body 2 inside the bracket 1, and the light-emitting element 6 can be a light strip in the prior art.

[0024] The bracket 1 consists of a support frame and an end cap. The end cap is used to close the end face opening of the support frame. A clearance groove is also provided on the end face of the end cap. The clearance groove is used to avoid the light-emitting surface of the light guide plate body 2. The clearance groove also abuts against both sides of the light guide plate body 2, and works with the support frame to stop and fix the light guide plate body 2.

[0025] Furthermore, the fixing component 3 includes an unlocking component 31. The bracket 1 has a sliding groove on the inner side near the side opening. The unlocking component 31 is slidably connected to the sliding groove by a compression spring 32. The middle end of the sliding groove connects to the bracket 1 to form a guide groove 11. The unlocking component 31 has a T-shaped structure, and its protruding part is slidably connected in the guide groove 11.

[0026] Furthermore, the mounting part 4 has an L-shaped structure, and its bent portion is rotatably connected to the bracket 1 via a pivot 33 and a torsion spring. The end of the mounting part 4 facing away from the pivot is inserted and fixed to the unlocking member 31 via a slot 41.

[0027] Specifically, under normal circumstances, the mounting part 4 is set open between the bracket 1 and the torsion spring. After the mounting part 4 is rotated and fixed by the unlocking part 31, the light-emitting part 6 is set correspondingly to the light guide plate body 2 and provides a light source for the light guide plate body 2.

[0028] It should be noted that the bracket 1 has an opening groove on the side near the unlocking component 31, which is used to place the connecting wire of the light-emitting component 6;

[0029] In this embodiment, after the mounting part 4 is closed, the two sides of the first positioning part 52 and the second positioning part 53 are fitted with the inner wall of the bracket 1 to ensure that the light-emitting element 6 will not slip off.

[0030] More specifically, the positioning structure 5 includes a pair of legs 51 and a first positioning part 52. The pair of legs 51 are L-shaped and are fixed to each other on the inner side of the mounting part 4. The bottom sides of the first positioning part 52 are bent inward to form a first connecting part 521. The first connecting part 521 is inserted into and abuts against the pair of legs 51.

[0031] It is worth mentioning that the support leg 51, the first positioning part 52 and the second positioning part 53 are all made of materials with deformation capabilities, such as rubber and plastic. When the first connecting part 521 is inserted into the support leg 51, and the second connecting part 522 is inserted into the third connecting part 531, they are inserted and pressed together by deformation. The friction force formed by the insertion is greater than the force of free sliding, so the purpose of pressing and fixing can be achieved.

[0032] In general, it also includes a second positioning part 53 located on both sides of the top of the first positioning part 52 with an upwardly extending extension portion. The free end of the extension portion is bent outward to form a second connecting part 522. The second positioning part 53 has a U-shaped structure, and a third connecting part 531 is provided at both ends of the bending point to be inserted into and abut against the second connecting part 522.

[0033] Specifically, after prolonged use, the first connecting part 521 can be unlocked to replace the first and second positioning parts as a whole, and the light-emitting element 6 can be replaced after the third connecting part 531 is unlocked.

[0034] Finally, the light-emitting element 6 is fixed between the second positioning part 53 and the first positioning part 52, and the second positioning part 53 avoids the light-emitting surface of the light-emitting element 6 through the side clearance groove.

[0035] Working method: Push the unlocking part 31 to disengage it from the slot 41. After the mounting part 4 is no longer fixed, the light-emitting part 6 will rotate under the action of the torsion spring of the rotating shaft 33 and the positioning structure 5. Of course, after the mounting part 4 is closed, the unlocking part 31 will engage with the slot 41 under the action of the compression spring 32, which can fix the mounting part 4.

[0036] Then, the light-emitting element 6 can be disassembled by directly pulling out the first positioning part 52, connecting the second positioning part 53 and the light-emitting element 6. After pulling out the second positioning part 53 to separate it from the first positioning part 52, the light-emitting element 6 can be disassembled.

[0037] Finally, the first connecting part 521 is inserted into and abutted against the pair of legs 51 to fix the first positioning part 52, while the second connecting part 522 and the third connecting part 531 are inserted into to fix the second positioning part 53. They are inserted and abutted against each other by deformation. The friction force formed by the insertion is greater than the force of free sliding, so the purpose of fixing can be achieved.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A light guide plate for a backlight comprising a support (1) and a light guide plate body (2) inside it, characterized in that: The mounting part (4) is rotatably connected to one end side of the bracket (1) through a fixing assembly (3), and the side surface of the mounting part (4) is detachably connected with a light emitting piece (6) through a positioning structure (5).

2. A light guide plate for a backlight according to claim 1, characterized in that: The fixing assembly (3) comprises an unlocking piece (31), and the inner side of the bracket (1) near the side opening is provided with a sliding groove, and the unlocking piece (31) is slidably connected in the sliding groove through a compression spring (32), wherein the middle end of the sliding groove is communicated with the bracket (1) to form a guide groove (11), and the unlocking piece (31) is in T-shaped structure, and the protruding part thereof is slidably connected in the guide groove (11).

3. A light guide plate for a backlight according to claim 2, characterized in that: The mounting part (4) is in L-shaped structure, and the bending part thereof is rotatably connected with the bracket (1) through a rotating shaft (33) and a torsion spring, and one end of the mounting part (4) away from the rotating shaft is fixedly connected with the unlocking piece (31) through a clamping groove (41).

4. The light guide plate for a backlight according to claim 1, wherein: The positioning structure (5) comprises a pair of supporting legs (51) and a first positioning part (52), the supporting legs (51) are in L-shaped structure, and the inner side of the mounting part (4) is fixedly connected between the supporting legs (51), the bottom of the first positioning part (52) is inwardly bent to form a first connecting part (521), and the first connecting part (521) is inserted and tightly abuts with the supporting legs (51).

5. A light guide plate for a backlight according to claim 4, characterized in that: The second positioning part (53) is provided with an extending part extending upward on both sides of the top of the first positioning part (52), the free end of the extending part is outwardly bent to form a second connecting part (522), the second positioning part (53) is in U-shaped structure, and the third connecting part (531) is provided at both ends of the second positioning part (53) and is inserted and tightly abuts with the second connecting part (522).

6. A light guide plate for a backlight according to claim 5, characterized in that: The second positioning part (53) is fixedly connected with the light emitting piece (6) between the first positioning part (52), and the side surface of the second positioning part (53) avoids the light emitting surface of the light emitting piece (6) through an avoiding groove.

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