CN221101224U

CN221101224U - Connection structure of LED lamp strip and light guide plate

Info

Publication number: CN221101224U
Application number: CN202323262188.0U
Authority: CN
Inventors: 杨世朋; 柯刚; 张林松; 孙国喜; 朱双艳
Original assignee: Nanchang Yimei Optoelectronics Technology Co ltd
Current assignee: Nanchang Yimei Optoelectronics Technology Co ltd
Priority date: 2023-11-30
Filing date: 2023-11-30
Publication date: 2024-06-07
Anticipated expiration: 2033-11-30

Abstract

The utility model discloses a connection structure of an LED light bar and a light guide plate, and relates to the field of backlight, wherein the connection structure comprises a PCB (printed circuit board), a fixed bracket and the light guide plate; the fixed bolster includes the U type support body that surrounds the lamp pearl setting, locates support body one side spliced pole and locating part, corresponds on the PCB board to be equipped with the connecting portion with the spliced pole adaptation, and the spacing portion with the locating part adaptation, the spliced pole inserts connecting portion to locate in the spacing portion through the locating part card, in order to be fixed in the PCB board with the fixed bolster on, and then through locating the light guide plate along PCB board length direction on the support body with carrying out the area light source and support. According to the utility model, the connecting column is used for inserting the PCB, the fixing support is fixed on the PCB through the limiting piece, and the fixing support is used for surrounding the lamp beads, so that the light barrier is fixed on the U-shaped support body along the length direction of the PCB, the contact area between the light guide plate and the support body is increased, and the connection stability is improved.

Description

Connection structure of LED lamp strip and light guide plate

Technical Field

The utility model relates to the field of backlight, in particular to a connecting structure of an LED lamp strip and a light guide plate.

Background

The backlight module is one of key components of the LCD panel, and has the functions of providing enough light source with uniform brightness and distribution so as to enable the backlight module to normally display images

Currently, in the edge-lit backlight product, a light guide plate is fixed on the surface of an LED light bar to convert a point light source emitted by an LED into a surface light source, so as to provide a uniform and stable surface light source support for a liquid crystal panel. To this end, a square top block is attached between two adjacent lamp beads on a PCB using an SMT process, and a light guide plate is fixed to the top blocks arranged along the length direction of the PCB to support the light guide plate.

However, because the PCB bonding pad is attached to the top block only through the solder paste, the push-pull force of the top block is limited, the risk of falling off of the top block easily occurs in the transportation process of the backlight module, and meanwhile, the contact area between the light guide plate and the top block is small, so that the possibility of falling off is also existed.

Disclosure of utility model

Based on the above, the utility model aims to provide a connecting structure of an LED light bar and a light guide plate, which aims to solve the problems that the push-pull force of a top block is limited only by attaching solder paste at present, the risk of falling off of the top block easily occurs in the transportation process of a backlight module, and meanwhile, the contact area between the light guide plate and the top block is smaller, and the possibility of falling off is also existed.

In order to achieve the above purpose, the present utility model is realized by the following technical scheme: the connecting structure of the LED lamp strip and the light guide plate comprises a PCB board, a fixing bracket and a light guide plate, wherein the fixing bracket is arranged on the PCB board;

The fixed bolster includes the U type support body that surrounds the lamp pearl setting, locates support body one side spliced pole and locating part, correspond on the PCB board be equipped with the connecting portion of spliced pole adaptation, and with the spacing portion of locating part adaptation, the spliced pole inserts connecting portion, and pass through the locating part card is located in the spacing portion, in order to be fixed in the fixed bolster on the PCB board, and then through locating the light guide plate along PCB board length direction in order to carry out the area light source support on the support body.

In summary, according to the connection structure of the LED light bar and the light guide plate, the connecting post is used for being inserted into the PCB, the fixing support is fixed on the PCB through the limiting piece, and meanwhile, the fixing support surrounds the light beads, so that the light barrier is fixed on the U-shaped support body along the length direction of the PCB, the contact area between the light guide plate and the support body is increased, and the connection stability is improved. Specifically, the connection structure of LED lamp strip and light guide plate includes the PCB board and locates the fixed bolster on the PCB board. The fixed bolster includes the U type support body that surrounds the lamp pearl setting, locates support body one side spliced pole and locating part. Compared with the prior single top block, the U-shaped bracket body increases the contact area with the light guide plate and improves the stability of the fixed bracket and the light guide plate. The PCB board is correspondingly provided with a connecting part matched with the connecting column and a limiting part matched with the limiting part, the connecting column is inserted into the connecting part and is clamped in the limiting part through the limiting part, so that the fixing support is fixed on the PCB board. When the connecting column is inserted into the connecting part, the limiting part is clamped on the limiting part, so that the relative movement of the fixing support and the PCB is avoided, and the push-pull force between the fixing support and the PCB is improved.

Further, the support body includes along the first support that PCB board length set up and symmetry locates the second support at first support both ends, the second support is followed the PCB board width sets up, just the length of second support is less than the width of PCB board.

Further, the connecting column is arranged on one side, close to the PCB, of the second bracket, so as to be used for being inserted into the PCB.

Further, the limiting piece is arranged on one side, away from the second support, of the first support, so that the fixed support and the PCB are prevented from moving relatively.

Further, one side of the bracket body, which is close to the PCB, is adhered to the PCB through glue.

Further, the connecting portions are symmetrically arranged on two sides of the lamp beads along the length direction of the PCB.

Further, the limiting part is arranged on the side edge of the PCB, and the projections of the connecting part arranged on the side edge of the PCB are symmetrically distributed at two ends of the limiting part.

Further, the light guide plate is fixed on the first bracket along the length direction of the PCB.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a connection structure between an LED light bar and a light guide plate according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a light guide plate

Fig. 3 is an assembly schematic view of a PCB board and a fixing bracket;

Fig. 4 is a schematic structural view of a PCB board;

Fig. 5 is a schematic structural view of the fixing bracket.

Description of the drawings element symbols:

The PCB comprises a PCB 100, a connecting part 110, a limiting part 120, a fixing bracket 200, a bracket body 210, a first bracket 211, a second bracket 212, a connecting column 220, a limiting part 230 and a light guide plate 300.

Detailed Description

In order to make the objects, features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the utility model are presented in the figures. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and the like are used herein for descriptive purposes only and not to indicate or imply that the apparatus or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

In the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 5, a schematic diagram of a connection structure of a PCB board 100 and a light guide plate 300 according to an embodiment of the utility model is shown, the connection structure of the PCB board 100 and the light guide plate 300 includes the PCB board 100, a fixing bracket 200 disposed on the PCB board 100, and the light guide plate 300 disposed on the fixing bracket 200, wherein:

In order to improve the connection stability between the light guide plate 300 and the PCB 100, the conventional square top block is eliminated, and the fixing bracket 200 of the present application is adopted. The fixing bracket 200 includes a U-shaped bracket body 210 designed around the lamp beads, a connection post 220 provided at one side of the bracket body 210, and a stopper 230. The holder body 210 includes a first holder 211 disposed along the length of the PCB 100 and second holders 212 symmetrically disposed at both ends of the first holder 211, the second holders 212 being disposed along the width of the PCB 100.

The bracket body 210 is designed in a U shape, and the purpose is that when the bracket body 210 is disposed around the lamp beads, the light guide plate 300 can be simultaneously fixed on the two second brackets 212 when the light guide plate 300 is fixed on the fixing bracket 200 along the length direction of the PCB board 100. Compared with the traditional square jacking block arranged between adjacent lamp beads, the contact area between the fixing support 200 and the light guide plate 300 is increased, and the stability of connection between the light guide plate 300 and the fixing support 200 is greatly improved. Meanwhile, in order to avoid the second bracket 212 interfering with other parts assembly, the length of the second bracket 212 is smaller than the width of the PCB 100.

Preferably, the connecting post 220 is disposed on a side of the second bracket 212 near the PCB 100, so as to be inserted into the PCB 100, thereby preventing the fixing bracket 200 and the PCB 100 from moving relatively. The PCB board 100 is correspondingly provided with a connecting portion 110 adapted to the connecting post 220, and the connecting portion 110 is symmetrically arranged at two sides of the lamp bead along the length direction of the PCB board 100. It should be noted that, in the present embodiment, the connecting posts 220 are disposed on the second brackets 212 disposed on the first brackets 211, and when the connecting posts 220 are inserted into the connecting portions 110, the fixing bracket 200 cannot rotate or move on the PCB board 100, and due to the limitation of the connecting posts 220, the push-pull force between the fixing bracket 200 and the PCB board 100 is greatly improved. Further, the side of the bracket body 210, which is close to the PCB 100, is adhered to the PCB 100 by glue or solder paste, so as to prevent the bracket body 210 from separating from the PCB 100, thereby greatly reducing the risk that the light guide plate 300 and the fixing bracket 200 are easy to fall off during the transportation of the backlight module

Further, in addition to the connection post 220 provided on the second bracket 212, a limiting member 230 is provided on a side of the first bracket 211 away from the second bracket 212, and the limiting member 230 is disposed towards the PCB board 100. Correspondingly, the limiting part 120 is formed along the side edge of the PCB 100 towards the direction where the lamp beads are arranged, the limiting part 120 and the limiting part 230 are arranged in a profiling mode, and projections of the connecting part 110 on the side edge of the PCB 100 are symmetrically distributed at two ends of the limiting part 120. When the fixing bracket 200 is mounted on the PCB board 100, the U-shaped bracket body 210 is pushed to be embedded around the lamp beads, the limiting member 230 first reaches the preset position and is clamped in the limiting portion 120, the connecting post 220 just enters the limiting portion 120 at this time, the fixing bracket 200 is assembled downwards, and a preset space is reserved between the fixing bracket 200 and the PCB board 100 for dispensing or brushing solder paste, so that the fixing bracket 200 is fixed on the PCB board 100. The cooperation of the connection post 220 and the connection part 110 prevents the relative movement between the fixing bracket 200 and the PCB board 100, and greatly enhances the push-pull force between the fixing bracket 200 and the PCB board 100, and the cooperation of the stopper 230 and the stopper 120 promotes the accurate positioning in the assembly process.

Further, when the light guide plate 300 is fixed along the length direction of the PCB 100, the two second brackets 212 are contacted simultaneously to be arranged above the lamp beads on the PCB 100, thereby improving the reliability between the light guide plate 300 and the fixing bracket 200. The risk of falling off in the transportation process of the backlight module is reduced.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing examples illustrate only a few embodiments of the utility model, and are described in detail, but are not to be construed as limiting the scope of the utility model. It should be noted that it is possible for those skilled in the art to make several variations and modifications without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The connecting structure of the LED lamp strip and the light guide plate is characterized by comprising a fixed bracket arranged on the PCB and the light guide plate arranged on the fixed bracket;

2. The connection structure of an LED light bar and a light guide plate according to claim 1, wherein the bracket body comprises a first bracket arranged along the length of the PCB and a second bracket symmetrically arranged at two ends of the first bracket, the second bracket is arranged along the width of the PCB, and the length of the second bracket is smaller than the width of the PCB.

3. The connection structure of the LED light bar and the light guide plate according to claim 2, wherein the connection post is disposed on a side of the second bracket, which is close to the PCB, for being inserted into the PCB.

4. The connection structure of an LED light bar and a light guide plate according to claim 3, wherein the limiting member is disposed on a side of the first bracket away from the second bracket, so as to prevent the fixed bracket and the PCB from moving relatively.

5. The connection structure of the LED light bar and the light guide plate according to claim 4, wherein one side of the bracket body, which is close to the PCB, is adhered to the PCB by glue.

6. The connection structure of the LED light bar and the light guide plate according to claim 1, wherein the connection portions are symmetrically disposed on two sides of the light beads along the length direction of the PCB.

7. The connection structure of the LED light bar and the light guide plate according to claim 6, wherein the limiting portion is disposed on a side of the PCB, and projections of the connecting portion disposed on the side of the PCB are symmetrically distributed at two ends of the limiting portion.

8. The connection structure of an LED light bar and a light guide plate according to claim 1, wherein the light guide plate is fixed to the first bracket along a length direction of the PCB.