Backlight module and display device

Abstract

The invention provides a backlight module and a display device. The backlight module comprises a back plate and a PCB (Printed Circuit Board), and the PCB and the back plate are fixedly arranged. The back plate comprises a plate body and a tongue piece. Wherein the tongue piece is connected to one side of the plate body, the tongue piece comprises a bearing part, a first fixing part and a second fixing part, the bearing part is connected to one side of the plate body, the first fixing part and the second fixing part are both connected with the bearing part, and the first fixing part and the second fixing part are oppositely arranged; the PCB is located between the first fixing part and the second fixing part and is clamped and fixed by the first fixing part and the second fixing part together. Through the arrangement of the first fixing part and the second fixing part, the PCB can be fixed without screws, and the space of the PCB for arranging components can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight module and a display device. Background Art

[0002] In the related art, the PCB in the display device is fixed on the back plate, and the PCB is fixed to the tongue of the back plate by screws. This method has the advantages of reliable fixing and automatic operation. However, because the screws need to be inserted into the PCB and the back plate, part of the space of the PCB will be occupied by the screws, which is not conducive to the miniaturization of the PCB. Summary of the invention

[0003] In view of this, the present application provides a backlight module and a display device to improve the problem that a PCB board occupies a large amount of space due to being fixed to a back plate.

[0004] The technical solution adopted by this application to solve the above technical problems is:

[0005] In a first aspect, an embodiment of the present application provides a backlight module, a backplane and a PCB board, wherein the PCB board is fixed to the backplane; wherein the backplane comprises:

[0006] plate body;

[0007] A tongue piece is connected to one side of the board body, and the tongue piece includes a bearing portion, a first fixing portion and a second fixing portion. The bearing portion is connected to one side of the board body, the first fixing portion and the second fixing portion are both connected to the bearing portion, and the first fixing portion and the second fixing portion are arranged opposite to each other, and the PCB board is located between the first fixing portion and the second fixing portion and is clamped by the first fixing portion and the second fixing portion.

[0008] In some embodiments of the present application, a minimum distance between the first fixing portion and the second fixing portion is smaller than a width of the PCB board.

[0009] In some embodiments of the present application, the first fixing portion includes a first accommodating section and a first clamping section connected to each other, and the first accommodating section is located between the first clamping section and the bearing portion, the second fixing portion includes a second accommodating section and a second clamping section connected to each other, and the second accommodating section is located between the second clamping section and the bearing portion, the first accommodating section and the second accommodating section are arranged opposite to each other, the first clamping section and the second clamping section are arranged opposite to each other, the minimum distance between the first accommodating section and the second accommodating section is greater than the maximum distance between the first clamping section and the second clamping section, and the first clamping section and the second clamping section jointly squeeze the PCB board.

[0010] In some embodiments of the present application, the first fixing portion further includes a first guide segment, and the second fixing portion further includes a second guide segment, the first guide segment is connected to an end of the first clamping segment away from the first accommodating segment, the second guide segment is connected to an end of the second clamping segment away from the second accommodating segment, and the first guide segment and the second guide segment are arranged opposite to each other along the width direction of the PCB board.

[0011] In some embodiments of the present application, a minimum distance between the first guide segment and the second guide segment in the width direction is not less than a maximum distance between the first clamping segment and the second clamping segment in the width direction.

[0012] In some embodiments of the present application, along the direction from the first guide section toward the first clamping section, the width of the guide space in the width direction gradually decreases.

[0013] In some embodiments of the present application, the first guide section, the first clamping section, the first accommodating section and the bearing portion are connected in sequence, and the surface of the connection between the first guide section and the first clamping section is an arcuate surface, the surface of the connection between the first clamping section and the first accommodating section is an arcuate surface, and the surface of the connection between the first accommodating section and the bearing portion is an arcuate surface; the second guide section, the second clamping section, the second accommodating section and the bearing portion are connected in sequence, and the surface of the connection between the second guide section and the second clamping section is an arcuate surface, the surface of the connection between the second clamping section and the second accommodating section is an arcuate surface, and the surface of the connection between the second accommodating section and the bearing portion is an arcuate surface.

[0014] In some embodiments of the present application, limiting grooves are provided on both sides of the PCB board in the width direction, and at least a portion of the first fixing portion and at least a portion of the second fixing portion are both located in the limiting grooves.

[0015] In some embodiments of the present application, along the light emitting direction of the backlight module, the bearing portion and the board body are arranged opposite to each other, the first fixing portion and the second fixing portion are arranged on the front side of the bearing portion, and the PCB board is arranged on the front side of the bearing portion, the front side is a side of the bearing portion away from the board body along the light emitting direction, and the components on the PCB board are located on a side of the PCB board facing the bearing portion; or, the first fixing portion is arranged on the back side of the bearing portion, the PCB board is arranged on the back side of the bearing portion, the back side is a side of the bearing portion facing the board body along the light emitting direction, and the components on the PCB board are located on a side of the PCB board away from the bearing portion.

[0016] In a second aspect, an embodiment of the present application provides a display device, comprising the backlight module as described in the first aspect.

[0017] In summary, due to the adoption of the above technical solution, this application has at least the following beneficial effects:

[0018] The embodiment of the present application provides a backlight module and a display device, by using the first fixing part and the second fixing part of the tongue piece to define a clamping space, the PCB board is arranged in the flexible space and is clamped by the first fixing part and the second fixing part, so as to realize the screw-free fixing of the PCB board, which is beneficial to saving the effective area on the PCB board and improving the upper limit of the miniaturization of the PCB board. In detail, by using the bearing part of the tongue piece, the PCB board is carried, and then the first fixing part and the second fixing part are arranged relatively to define the clamping space and form a clamping effect on the PCB board arranged in the clamping space, and then the screw-free fixing of the PCB board is realized, that is, the problem that the PCB board needs to reserve part of the space for the screw, resulting in waste of area on the PCB board, which is not conducive to miniaturization is effectively solved. In addition, because the PCB board only needs to be placed in the clamping space defined between the first fixing part and the second fixing part, its placement action is similar to the action process of placing the PCB board and the tongue piece in the threaded hole alignment, that is, the method of fixing the PCB board with screws can use automatic equipment to improve the operation efficiency, so the PCB board is placed in the clamping space, and the automatic equipment can also be used to operate, which provides operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a backlight module provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of another backlight module provided in an embodiment of the present application;

[0021] Figure 3 A schematic structural diagram of a back plate in a backlight module provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of a tongue piece in a backlight module provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of a PCB board in a backlight module provided in an embodiment of the present application being arranged on a tongue piece;

[0024] Figure 6 A schematic diagram of another backlight module provided in an embodiment of the present application in which a PCB board is arranged on a tongue piece;

[0025] Figure 7 A schematic structural diagram of a PCB board in a backlight module provided in an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 100, back plate; 110, plate body; 120, tongue; 121, bearing portion; 122, first fixing portion; 1221, first accommodating section; 1222, first clamping section; 1223, first guiding section; 123, second fixing portion; 1231, second accommodating section; 1232, second clamping section; 1233, second guiding section; 200, PCB board; 210, limiting groove; 300, components;

[0028] 10. Flexible circuit board; 11. First adhesive layer; 20. Light source; 30. Reflector; 40. Light guide plate; 50. Optical module; 60. Second adhesive layer; 70. First substrate; 80. Second substrate; 90. Polarizer. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0030] In the description of this application, it should be understood that the words "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] The present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or multiple times in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0032] See also Figures 1 to 7 The embodiment of the present application provides a backlight module, including a back plate 100 and a PCB board 200. The PCB board 200 is fixed to the back plate 100. The back plate 100 includes a plate body 110 and a tongue piece 120.

[0033] Among them, see Figure 4, the tongue piece 120 is connected to one side of the board body 110, and the tongue piece 120 includes a bearing portion 121, a first fixing portion 122 and a second fixing portion 123. The bearing portion 121 is connected to one side of the board body 110, and the first fixing portion 122 and the second fixing portion 123 are both connected to the bearing portion 121, and the first fixing portion 122 and the second fixing portion 123 are arranged opposite to each other, and the PCB board 200 is located between the first fixing portion 122 and the second fixing portion 123 and is clamped and fixed by the first fixing portion 122 and the second fixing portion 123. For the convenience of subsequent description, the space defined by the relative arrangement of the first fixing portion 122 and the second fixing portion 123 is defined as a fixed space.

[0034] The technical solution provided by the present application defines a clamping space by using the first fixing portion 122 and the second fixing portion 123 of the tongue 120, and the PCB board 200 is arranged in the flexible space and is clamped by the first fixing portion 122 and the second fixing portion 123, so as to realize screw-free fixing of the PCB board 200, which is beneficial to saving the effective area on the PCB board 200 and improving the upper limit of miniaturization of the PCB board 200. In detail, by using the bearing portion 121 of the tongue 120 to bear the PCB board 200, and then using the first fixing portion 122 and the second fixing portion 123 to be arranged relatively to define the clamping space and form a clamping effect on the PCB board 200 arranged in the clamping space, then the screw-free fixing of the PCB board 200 is realized, that is, the problem that the PCB board 200 needs to reserve part of the space for the screws, resulting in waste of area on the PCB board 200, which is not conducive to miniaturization is effectively solved. In addition, because the PCB board 200 only needs to be placed in the clamping space defined between the first fixing portion 122 and the second fixing portion 123, its placement action is similar to the action process of aligning the PCB board 200 and the tongue 120 with the threaded holes, that is, the method of fixing the PCB board 200 with screws can be automated by using automatic equipment. Therefore, placing the PCB board 200 in the clamping space can still be automated by using automatic equipment.

[0035] It should be noted that the first fixing portion 122 and the second fixing portion 123 are both in the form of sheets and have certain elastic properties, so that the first fixing portion 122 and the second fixing portion 123 can be appropriately deformed when squeezed, and can automatically recover after the squeezing force disappears. For example, when squeezed by the PCB board 200, the first fixing portion 122 and the second fixing portion 123 will be deformed to facilitate the placement of the PCB board 200 into the fixed space. The bearing portion 121 is in the form of a plate, and mainly serves to connect the two fixing portions and support the PCB board 200. The bearing portion 121 generally does not have the property of elastic deformation and is made of rigid material.

[0036] In some embodiments, see Figure 4, when the PCB board 200 is not fixed in the fixed space, the minimum distance between the first fixing portion 122 and the second fixing portion 123 is less than the width of the PCB board 200. In other words, when the PCB board 200 is placed in the fixed space, the two sides of the width direction of the PCB board 200 will form an extrusion effect on the first fixing portion 122 and the second fixing portion 123, causing the first fixing portion 122 and the second fixing portion 123 to deform in a direction away from each other, so as to expand the distance between the first fixing portion 122 and the second fixing portion 123. At this time, since the first fixing portion 122 and the second fixing portion 123 have the characteristics of elastic deformation, when being squeezed by the PCB board 200, an elastic force for restoring the deformation will be generated, the elastic force direction of the first fixing portion 122 is toward the second fixing portion 123, and the elastic force direction of the second fixing portion 123 is toward the first fixing portion 122. The elastic forces generated by the first fixing portion 122 and the second fixing portion 123 act on one side of the PCB board 200 in the width direction, respectively, to clamp and fix the PCB board 200. The clamping and fixing method does not occupy the front space of the PCB board 200, that is, it does not affect the installation of the components 300, nor does it reduce the space for installing the components 300. In addition, the entire installation process only requires the PCB board 200 to be aligned with the fixed space and pressed into the fixed space, and the installation action can be achieved by automated equipment.

[0037] Further, the first fixing portion 122 includes a first accommodating section 1221 and a first clamping section 1222 connected to each other. The first accommodating section 1221 is located between the first clamping section 1222 and the bearing portion 121. The second fixing portion 123 includes a second accommodating section 1231 and a second clamping section 1232 connected to each other. The second accommodating section 1231 is located between the second clamping section 1232 and the bearing portion 121. The first accommodating section 1221 and the second accommodating section 1231 are arranged opposite to each other and define an accommodating space, and the first clamping section 1222 and the second clamping section 1232 are arranged opposite to each other and define a clamping space. The accommodating space is mainly used to accommodate the PCB board 200, and the clamping space is mainly used to fix the PCB board 200. Among them, the clamping space and the accommodating space are connected to form a fixed space, that is, the fixed space is composed of the clamping space and the accommodating space. The width of the clamping space is smaller than the width of the accommodating space, and the width here is based on the width direction of the PCB board 200. In other words, the minimum distance between the first accommodating section 1221 and the second accommodating section 1231 is greater than the maximum distance between the first clamping section 1222 and the second clamping section 1232. The width of the clamping space is set to be smaller than the width of the accommodating space, mainly so that when the PCB board 200 is placed in the accommodating space, a part of the PCB board 200, specifically a part away from the bearing portion 121, can be located in the clamping space and is clamped by the first clamping section 1222 and the second clamping section 1232, thereby realizing screwless fixing of the PCB board 200.

[0038] Furthermore, the first fixing portion 122 further includes a first guide section 1223, and the second fixing portion 123 further includes a second guide section 1233. The first guide section 1223 is connected to an end of the first clamping section 1222 away from the first accommodating section 1221, that is, the first clamping section 1222 is located between the first guide section 1223 and the first accommodating section 1221. The second guide section 1233 is connected to an end of the second clamping section 1232 away from the second accommodating section 1231, that is, the second clamping section 1232 is located between the second guide section 1233 and the second accommodating section 1231. The first guide section 1223 and the second guide section 1233 are arranged opposite to each other along the width direction of the PCB board 200 and define a guide space, and the guide space is connected to the fixing space. When the PCB board 200 is placed in the fixed space, it will first pass through the guide space during the placement process, and under the guidance of the first guide segment 1223 and the second guide segment 1233, it will smoothly enter the fixed space, thereby facilitating the alignment and installation of the PCB board 200 with the fixed space.

[0039] Specifically, the minimum spacing between the first guide segment 1223 and the second guide segment 1233 in the width direction is not less than the maximum spacing between the first clamping segment 1222 and the second clamping segment 1232 in the width direction. It should also be noted that the minimum spacing between the first guide segment 1223 and the second guide segment 1233 in the width direction is also not less than the maximum width of the PCB board 200 in the width direction, ensuring that the PCB board 200 can be easily aligned and enter the guide space. By limiting the minimum spacing between the two guide segments to be not less than the maximum spacing between the two clamping segments, the PCB board 200 can be more easily aligned with the fixed space during the process of being placed in the fixed space due to the setting of the guide space, thereby assisting the PCB board 200 to enter the accommodating space and be clamped by the two clamping segments.

[0040] In some embodiments, the width of the guide space in the width direction gradually decreases along the direction from the first guide section 1223 toward the first clamping section 1222 , so that the width of the guide space gradually approaches the width of the clamping space, thereby guiding the fixation of the PCB board 200 .

[0041] In some embodiments, the first guide section 1223, the first clamping section 1222, the first accommodating section 1221, and the bearing portion 121 are connected in sequence, and the connection between the sections and the connection between the first accommodating section 1221 and the bearing portion 121 are all arc-shaped. Correspondingly, the second guide section 1233, the second clamping section 1232, the second accommodating section 1231, and the bearing portion 121 are connected in sequence, and the connection between the sections and the connection between the second accommodating section 1231 and the bearing portion 121 are also arc-shaped. Specifically, the surface of the connection between the first guide section 1223 and the first clamping section 1222 is an arc surface, the surface of the connection between the first clamping section 1222 and the first accommodating section 1221 is an arc surface, and the surface of the connection between the first accommodating section 1221 and the bearing portion 121 is an arc surface; the surface of the connection between the second guide section 1233 and the second clamping section 1232 is an arc surface, the surface of the connection between the second clamping section 1232 and the second accommodating section 1231 is an arc surface, and the surface of the connection between the second accommodating section 1231 and the bearing portion 121 is an arc surface. Each connection is in an arc shape, which can effectively prevent the connection between each section from causing damage to the PCB board 200. In addition, by setting each connection to an arc shape, in the process of pressing the PCB board 200 into a fixed space, the PCB board 200 can move more smoothly along the guide section, the clamping section and the accommodating section and transition from one space to another space, which facilitates the installation of the PCB board 200 and reduces the wear of the PCB board 200 caused by the installation.

[0042] In some embodiments, the first fixing portion 122 is in an S-shape, and the second fixing portion 123 is in an S-shape opposite to the first fixing portion 122. Of course, in other embodiments, the first fixing portion 122 and the second fixing portion 123 may also be in other shapes, such as the first fixing portion 122 may be in the shape of a “>” symbol, the second fixing portion 123 may be in the shape of a “<” symbol, and so on.

[0043] In some embodiments, see Figure 7 , limiting grooves 210 are provided on both sides of the width direction of the PCB board 200. At least part of the first fixing portion 122 and at least part of the second fixing portion 123 are both located in the limiting grooves 210. By setting a part of the first fixing portion 122 in the limiting groove 210 on one side of the PCB board 200 and a part of the second fixing portion 123 in the limiting groove 210 on the other side of the PCB board 200, the first fixing portion 122 and the second fixing portion 123 can limit the movement of the PCB board 200 in the length direction, thereby preventing the PCB board 200 from sliding in the length direction during the clamping process.

[0044] In some embodiments, see Figure 1 and Figure 5, the first fixing portion 122 and the second fixing portion 123 are arranged on the front side of the carrying portion 121, the PCB board 200 is arranged on the front side of the carrying portion 121, and the components 300 on the PCB board 200 are located on the side of the PCB board 200 facing the carrying portion 121. At this time, the opening of the fixed space defined by the first fixing portion 122 and the second fixing portion 123 faces upward in the vertical direction, and the upward here refers to the side where the subsequent liquid crystal layer exists. To a certain extent, the space occupied by the PCB board 200, the carrying portion 121 and the components 300 in the vertical direction can be reduced, that is, the common thickness of the PCB board 200, the carrying portion 121 and the components 300 can be reduced.

[0045] In some embodiments, see Figure 2 and Figure 6 , the first fixing portion 122 is arranged on the back side of the bearing portion 121, the PCB board 200 is arranged on the back side of the bearing portion 121, and the components 300 on the PCB board 200 are located on the side of the PCB board 200 away from the bearing portion 121. At this time, the opening of the fixed space defined by the first fixing portion 122 and the second fixing portion 123 faces downward in the vertical direction. The downward here refers to the direction opposite to the upward in the vertical direction. At this time, because the components 300 are arranged on the side of the PCB board 200 away from the bearing portion 121, that is, the bearing portion 121 will not affect the area of ​​the PCB board 200 where the components 300 are arranged, compared with the previous embodiment, the opening of the fixed space defined by the first fixing portion 122 and the second fixing portion 123 faces upward in the vertical direction, this embodiment can further increase the arrangement space of the components 300 on the PCB board 200.

[0046] It should be noted that the front side is a side of the carrying portion 121 away from the board body 110 along the light emitting direction, and the back side is a side of the carrying portion 121 facing the board body 110 along the light emitting direction.

[0047] In some embodiments, there are multiple tongue pieces 120 , and the multiple tongue pieces 120 are arranged in sequence and spaced apart along the length direction of the PCB board 200 to achieve overall fixation of the PCB board 200 .

[0048] In some embodiments, see Figure 1 or Figure 2The backlight module includes a flexible circuit board 10, a first adhesive layer 11, a light source 20, a reflective sheet 30, a light guide plate 40, an optical module 50, a second adhesive layer 60, a first substrate 70, a liquid crystal layer (not shown in the figure), a second substrate 80, and a polarizer 90. The flexible circuit board 10 and the reflective sheet 30 are arranged on the board body 110 at intervals, the light source 20 is arranged on the flexible circuit board 10, the light guide plate 40 is arranged on the side of the reflective sheet 30 away from the board body 110 and is fixed by the first adhesive layer 11. The optical module 50 is arranged on the side of the light guide plate 40 away from the board body 110, the second adhesive layer 60 is arranged on the side of the back plate 100 away from the board body 110, the first substrate 70, the liquid crystal layer, the second substrate 80 and the polarizer 90 are arranged on the light guide plate 40 in sequence, and the first substrate 70 is fixed to the side of the back plate 100 away from the board body 110 by the second adhesive layer 60. Among them, the first substrate 70 can be an array substrate, and the second substrate 80 can be a color filter substrate.

[0049] The embodiment of the present application further provides a display device (not shown in the figure), which includes the backlight module described in any of the above embodiments. Because the display device includes the backlight module described in any of the above embodiments, the structure and beneficial effects of the backlight module are also possessed by the display device, so they are not described here in detail.

[0050] It should be noted that in order to simplify the description of the embodiments of the present application and thus help understand one or more embodiments, in the above description of the embodiments of the present application, multiple features are sometimes merged into one embodiment, drawing or description thereof. However, this disclosure method does not mean that the features required by the object of the present application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

Claims

1. A backlight module, characterized in that: The invention comprises a back plate and a PCB board, wherein the PCB board is fixed to the back plate; wherein the back plate comprises: plate body; A tongue piece is connected to one side of the board body, and the tongue piece includes a bearing portion, a first fixing portion and a second fixing portion. The bearing portion is connected to one side of the board body, the first fixing portion and the second fixing portion are both connected to the bearing portion, and the first fixing portion and the second fixing portion are arranged opposite to each other, and the PCB board is located between the first fixing portion and the second fixing portion and is clamped by the first fixing portion and the second fixing portion.

2. The backlight module according to claim 1, characterized in that: The minimum distance between the first fixing portion and the second fixing portion is smaller than the width of the PCB board.

3. The backlight module according to claim 2, characterized in that: The first fixing portion includes a first accommodating section and a first clamping section connected to each other, and the first accommodating section is located between the first clamping section and the bearing portion, the second fixing portion includes a second accommodating section and a second clamping section connected to each other, and the second accommodating section is located between the second clamping section and the bearing portion, the first accommodating section and the second accommodating section are arranged opposite to each other, the first clamping section and the second clamping section are arranged opposite to each other, the minimum distance between the first accommodating section and the second accommodating section is greater than the maximum distance between the first clamping section and the second clamping section, and the first clamping section and the second clamping section jointly squeeze the PCB board.

4. The backlight module according to claim 3, characterized in that: The first fixing portion further includes a first guide section, and the second fixing portion further includes a second guide section, the first guide section is connected to an end of the first clamping section away from the first accommodating section, the second guide section is connected to an end of the second clamping section away from the second accommodating section, and the first guide section and the second guide section are arranged opposite to each other along the width direction of the PCB board.

5. The backlight module according to claim 4, characterized in that: A minimum distance between the first guide section and the second guide section in the width direction is not less than a maximum distance between the first clamping section and the second clamping section in the width direction.

6. The backlight module according to claim 5, characterized in that: Along the direction from the first guide section toward the first clamping section, the width of the guide space in the width direction gradually decreases.

7. The backlight module according to claim 5, characterized in that: The first guide section, the first clamping section, the first accommodating section and the bearing portion are connected in sequence, the surface of the connection between the first guide section and the first clamping section is an arcuate surface, the surface of the connection between the first clamping section and the first accommodating section is an arcuate surface, the surface of the connection between the first accommodating section and the bearing portion is an arcuate surface, the second guide section, the second clamping section, the second accommodating section and the bearing portion are connected in sequence, the surface of the connection between the second guide section and the second clamping section is an arcuate surface, the surface of the connection between the second clamping section and the second accommodating section is an arcuate surface, and the surface of the connection between the second accommodating section and the bearing portion is an arcuate surface.

8. The backlight module according to any one of claims 1 to 7, characterized in that: Limiting grooves are provided on both sides of the PCB board in the width direction, and at least a portion of the first fixing portion and at least a portion of the second fixing portion are both located in the limiting grooves.

9. The backlight module according to any one of claims 1 to 7, characterized in that: Along the light emitting direction of the backlight module, the bearing part and the board body are arranged opposite to each other, the first fixing part and the second fixing part are arranged on the front side of the bearing part, the PCB board is arranged on the front side of the bearing part, the front side is a side of the bearing part away from the board body along the light emitting direction, and the components on the PCB board are located on the side of the PCB board facing the bearing part; or, the first fixing part is arranged on the back side of the bearing part, the PCB board is arranged on the back side of the bearing part, the back side is a side of the bearing part facing the board body along the light emitting direction, and the components on the PCB board are located on the side of the PCB board away from the bearing part.

10. A display device, characterized in that: It comprises the backlight module as claimed in any one of claims 1 to 9.

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