Frame structure capable of increasing clamping stability, backlight module and display device

Abstract

A frame structure capable of increasing clamping stability comprises a back plate (1) which comprises a bottom plate (1a) and a plurality of side plates (1b) connected to the periphery of the bottom plate (1a), and clamping structures (11) are formed on the outer sides of the side plates (1b); the frame (2) is annularly arranged on the back plate (1) and comprises at least one side part (2a), an opening (21) and a positioning broken hole (22) are formed in the edge of the side part (2a), the opening (21) is sunken in the combining direction to form the positioning broken hole (22), the outer contour of the positioning broken hole (22) is in a non-closed polygon shape, and the distance between two opposite bevel edges (221), closer to the opening (21), of the positioning broken hole (22) is gradually decreased in the direction towards the opening (21). The positioning broken hole (22) is detachably connected to the clamping and fixing structure (11) in a sleeved mode in the combination direction. The invention further provides a backlight module comprising the frame structure and a display device.

Description

Frame structure, backlight module and display device capable of increasing locking stability

[0001] This application claims priority to Chinese patent application No. 202310706142.9 filed on June 14, 2023, entitled “Frame structure, backlight module and display device capable of increasing snap-fit ​​stability,” and all of its contents are incorporated herein by reference. Technical Field

[0002] The present invention mainly relates to a frame structure, in particular to a frame structure for limiting the position of a back plate and a frame to meet the assembly and disassembly functions, a backlight module having the frame structure, and a display device using the backlight module. Background Art

[0003] Please refer to Figure 1, which shows a conventional positioning structure of a backlight module. The conventional positioning structure of the backlight module includes a back plate 91 and a frame 92, wherein the back plate 91 is provided with a limiting hole 93, and the frame 92 is provided with a positioning column 94 corresponding to the limiting hole 93. The positioning column 93 is detachably coupled to the limiting hole 94, thereby coupling the frame 92 to the back plate 91.

[0004] In the conventional backlight module positioning structure, since the limiting hole 93 and the positioning post 94 are both circular in appearance, the positioning post 94 is easily disengaged after being engaged with the limiting hole 93, resulting in poor assembly stability between the frame 92 and the back plate 91.

[0005] In view of this, it is necessary to provide a framework structure to solve the above problems.

[0006] Summary of the Invention

[0007] The object of the present invention is to provide a frame structure which can limit the position of a back plate and a frame to meet the assembly and disassembly functions and at the same time increase the engagement stability.

[0008] A second object of the present invention is to provide a backlight module having the above-mentioned frame structure.

[0009] Another object of the present invention is to provide a display device having the above-mentioned backlight module.

[0010] To achieve the above-mentioned purpose, the present invention provides a frame structure that can increase the stability of the clamping, comprising: a back plate, which includes a bottom plate and several side plates connected to the periphery of the bottom plate, and a clamping structure is formed on the outer side of the side plate; and a frame, which is arranged in an annular manner on the back plate and includes at least one side portion, and the edge of the side portion is formed with an opening and a positioning hole formed by the opening being recessed along the coupling direction. The outer contour of the positioning hole is a non-closed polygon, and the distance between the two opposite oblique sides closer to the opening gradually decreases as it moves toward the opening. The positioning hole is detachably connected to the clamping structure along the coupling direction.

[0011] In some embodiments, the side portion further forms a plurality of slit structures, which are connected to the top edge of the positioning hole and are respectively arranged closer to the vertices on both sides of the top edge, and the top edge is used to abut the top surface of the fixing structure.

[0012] In some embodiments, the length of each of the slit structures is L1, the length of the top edge of the positioning hole is L2, and L1>2 / 3×L2.

[0013] In some embodiments, the extending directions of the plurality of slit structures are respectively parallel to at least a plurality of sides of the positioning hole.

[0014] In some embodiments, the outer contour of the fastening structure is a closed polygon, and at least several sides of the positioning hole correspond to at least several sides of the fastening structure, so that the fastening structure and the positioning hole form multiple surface contacts.

[0015] In some embodiments, the outer contour of the fastening structure is elliptical, so that the fastening structure forms multiple point contacts with the positioning hole.

[0016] In some embodiments, the positioning hole has a center line extending along the combining direction, and the lengths of the sides located on both sides of the center line decrease along a direction toward the opening of the side portion.

[0017] In some embodiments, the opening has a first aperture, and the positioning hole has a second aperture, wherein the first aperture is smaller than the second aperture in a width direction perpendicular to the combining direction.

[0018] The present invention further provides a backlight module, comprising: the aforementioned frame structure; and a light-emitting element disposed between the back plate and the frame.

[0019] The present invention further provides a display device, comprising: the above-mentioned backlight module; and a display panel disposed in front of the backlight module.

[0020] The frame structure, backlight module, and display device of the present invention, which can increase the stability of the engagement, have the following characteristics: by designing the outer contour of the positioning hole into a non-closed polygon, and by gradually decreasing the distance between the two opposing oblique sides closer to the opening toward the opening, when the securing structure is confined in the positioning hole, it is restrained by the two gradually decreasing opposing oblique sides and does not slip along the curved surface. Therefore, not only can the assembly stability of the securing structure and the positioning hole be improved, but the position of the frame and the backplate in the X, Y, and Z axes can also be simultaneously limited, and assembly and disassembly functions can be satisfied. Thus, the frame structure, backlight module, and display device of the present invention, which can increase the stability of the engagement, have the effects of reducing the optical distance, thinning the backlight module height, and reducing the risk of uneven brightness on the light-emitting surface. Furthermore, the design requirements for thin structures used in direct-lit automotive applications are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the above and other objects, features, advantages and embodiments of the present invention more apparent and understandable, the following description is given with reference to the accompanying drawings.

[0022] FIG1 is a diagram showing the combined operation of a conventional backlight module;

[0023] FIG2 is a perspective view of a first embodiment of a frame structure capable of increasing engagement stability according to the present invention;

[0024] FIG3 is an exploded perspective view of a first embodiment of a frame structure capable of increasing engagement stability according to the present invention;

[0025] FIG4 is a perspective view of a second embodiment of a frame structure capable of increasing engagement stability according to the present invention;

[0026] FIG5 is a front view of FIG4 . DETAILED DESCRIPTION

[0027] The following describes embodiments of the present invention in detail with reference to the accompanying drawings. The drawings are primarily simplified schematic diagrams, illustrating the basic structure of the present invention. Therefore, only components relevant to the present invention are shown in the drawings, and the components shown are not drawn with the exact number, shape, or dimensional ratio of actual implementation. The actual dimensions and specifications of the components used in an actual implementation are a matter of choice, and the component layout may be more complex.

[0028] The following descriptions of the embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention may be implemented. Directional terms used herein, such as "upper," "lower," "front," and "rear," refer only to the directions in the accompanying drawings. Therefore, the directional terms used are intended to illustrate and understand this application and are not intended to limit this application. Furthermore, throughout this specification, unless expressly stated to the contrary, the word "comprising" will be understood to imply the inclusion of the stated elements but not the exclusion of any other elements.

[0029] Please refer to Figures 2 and 3, which are, respectively, a perspective assembled view and an exploded perspective view of a first embodiment of a frame structure capable of enhancing engagement stability according to the present invention. The frame structure comprises a back panel 1 and a frame 2. The back panel 1 is formed with a securing structure 11, and the frame 2 is formed with an opening 21 and a positioning hole 22 formed by recessing the opening 21 along an engagement direction D. The positioning hole 22 is removably attached to the securing structure 11 along the engagement direction D. In this embodiment, the outer contour of the positioning hole 22 is a non-closed polygon, and the distance between two opposing oblique sides 221 closer to the opening 21 gradually decreases as it moves toward the opening 21. Consequently, when the securing structure 11 is retained in the positioning hole 22, it is held in place by the tapered opposing oblique sides 221. This prevents the securing structure 11 from easily escaping from the positioning hole 22 and prevents it from slipping along an arc. Furthermore, the frame 2 and the back panel 1 can be positioned in the three axes (X, Y, and Z) while meeting the requirements of a thin design.

[0030] The back panel 1 includes a bottom panel 1 a and a plurality of side panels 1 b connected to the periphery of the bottom panel 1 a , and a fastening structure 11 is formed on the outer side of the side panels 1 b .

[0031] In this embodiment, the frame 2 is made of plastic, and the outer contour of the positioning hole 22 is a non-regular hexagon. Specifically, the frame 2 is arranged around the back plate 1 and includes at least one side portion 2a. The edge of the side portion 2a forms an opening 21 and a positioning hole 22. The opening 21 has a first aperture H1, and the positioning hole 22 has a second aperture H2. In the width direction W perpendicular to the coupling direction D, the first aperture H1 is smaller than the second aperture H2. When the fastening structure 11 is restrained in the positioning hole 22, the larger second aperture H2 results in a smaller interference fit than when the fastening structure 11 enters the opening 21 with the smaller first aperture H1.

[0032] Furthermore, since the distance between the two opposite oblique sides 221 of the positioning hole 22 closer to the opening 21 gradually decreases in the direction toward the opening 21, when the fixing structure 11 is coupled to the positioning hole 22, the fixing structure 11 squeezes into the opening 21 to reach the positioning hole 22, so that the two oblique sides 221 limit the fixing structure 11 in the Z-axis direction and prevent the fixing structure 11 from jumping out of the positioning hole 22.

[0033] As described above, when the outer contour of the positioning hole 22 presents a non-closed polygon, the positioning hole 22 has a centerline L extending along the engagement direction D, and the length of the sides located on either side of the centerline L decreases as it approaches the opening 21, resulting in a design in which the sides of the positioning hole 22 located on either side of the centerline L are longer at the top and shorter at the bottom. In other words, the lengths of the two opposing oblique sides 222 of the positioning hole 22 farther from the opening 21 are greater than the lengths of the two opposing oblique sides 221 of the positioning hole 22 closer to the opening 21. This allows the shorter oblique sides of the positioning hole 22 to be easily flipped over and deformed for easier disassembly, while the longer oblique sides provide a larger surface contact area, resulting in a more pronounced positioning effect and thus increasing engagement strength. On the contrary, if the oblique sides on both sides of the positioning hole 22 are designed to be shorter at the top and longer at the bottom, the lower half of the positioning hole 22 will become narrower and smaller as it approaches the opening 21 during assembly, resulting in a larger interference when the fastening structure 11 enters the lower half of the positioning hole 22, which is not conducive to the fastening structure 11 being snapped in.

[0034] It is worth noting that when the frame 2 is removed from the back panel 1, most of the stress is concentrated at the acute corner of the polygon above the positioning hole 22. To prevent damage to the positioning hole 22 during disassembly, the present invention further includes several slit structures 23 formed on the side portion 2a of the frame 2. These slit structures 23 are located adjacent to the polygonal vertices of the positioning hole 22 to disperse the stress applied to the acute corner of the polygon above the positioning hole 22. In this embodiment, the slit structures 23 are connected to the top edge 223 of the positioning hole 22 and are located adjacent to the vertices on both sides of the top edge 223. The top edge 223 is designed to abut the top surface of the securing structure 11, thereby producing a significant securing effect when the two abut against each other. When disassembly is required, the slit structures 23 can impart greater deformation capacity to the positioning hole 22, achieving a partially expanded effect, allowing the securing structure 11 to be smoothly separated from the positioning hole 22, thereby fulfilling both assembly and disassembly functions.

[0035] In order to avoid the situation where the positioning hole 22 cannot produce a deformation effect due to the slit structures 23 being too short, in this embodiment, each slit structure 23 is designed with a minimum length. For example, the length of each slit structure 23 is L1, and the length of the top edge 223 of the positioning hole 22 is L2, and L1>2 / 3×L2. In this way, it can be ensured that the positioning hole 22 can produce a significant deformation effect. Furthermore, the extension direction of the slit structures 23 is parallel to at least several sides of the positioning hole 22. In this embodiment, the extension direction of the slit structures 23 is respectively parallel to the two oblique sides 222 connecting the top edge 223 of the positioning hole 22. In this way, the slit structures 23 can be more easily flipped open along the edge direction of the positioning hole 22.

[0036] It is noteworthy that in this embodiment, the outer contour of the fastening structure 11 is a closed polygon. At least several sides of the fastening structure 11 correspond to at least several sides of the positioning hole 22, forming multiple surface contacts between the fastening structure 11 and the positioning hole 22. This increases the contact area between the fastening structure 11 and the positioning hole 22, thereby enhancing the engagement strength and improving the assembly stability between the positioning hole and the fastening structure.

[0037] Please refer to Figures 4 and 5, which are respectively a perspective view and a front view of a second embodiment of the frame structure for enhancing engagement stability according to the present invention. Compared to the first embodiment, the second embodiment differs in that the outer contour of the securing structure 11 is elliptical, thereby forming multiple point contacts between the securing structure 11 and the positioning holes 22. Although the contact area is relatively small, the securing structure 11 can be designed with a relatively simple elliptical shape to meet general engagement strength requirements.

[0038] In the first and second embodiments of the frame structure for enhancing engagement stability of the present invention, the side portion 2a further forms a guide channel 24 connecting the opening 21 and the positioning hole 22. The width of the guide channel 24 gradually decreases from the opening 21 toward the positioning hole 22. This creates a funnel-like design, utilizing the relatively wide opening 21 to smoothly guide the securing structure 11 into the guide channel 24. The gradually decreasing width of the guide channel 24 also facilitates smoother engagement of the securing structure 11 from the opening 21 into the positioning hole 22, securing the securing structure 11 in place.

[0039] When the frame structure of the present invention is assembled into a backlight module, it comprises: the aforementioned frame structure; and a light-emitting element disposed between the back plate 1 and the frame 2 .

[0040] When the frame structure of the present invention is assembled into a display device, it comprises: the aforementioned backlight module; and a display panel disposed in front of the backlight module.

[0041] As described above, the frame structure, backlight module, and display device of the present invention, which can enhance the stability of the engagement, are designed to have the outer contour of the positioning hole as a non-closed polygon, with the distance between the two opposing oblique sides closer to the opening gradually decreasing as it moves toward the opening. Therefore, when the securing structure is restrained in the positioning hole, it is held in place by the two opposing oblique sides, which gradually decrease, and does not slip along the curved surface. Therefore, not only can the assembly stability of the securing structure and the positioning hole be enhanced, but the position of the frame and backplate can also be simultaneously limited in the X, Y, and Z axes, and assembly and disassembly functions can be satisfied. Thus, the frame structure, backlight module, and display device of the present invention, which can enhance the stability of the engagement, have the effects of reducing optical distance, thinning the backlight module height, and reducing the risk of uneven brightness on the light-emitting surface. Furthermore, they can meet the design requirements of a thin architecture for direct-lit automotive applications.

[0042] The embodiments disclosed above are merely illustrative of the principles, features, and effects of the present invention and are not intended to limit the scope of the present invention. Any person skilled in the art may modify or alter the embodiments described above without departing from the spirit and scope of the present invention. Any equivalent changes or modifications resulting from the present invention are intended to be covered by the scope of the appended claims.

[0043] [List of reference numerals] 1: Back panel 1a: Bottom panel 1b: Side panel 11: Fixing structure 2: Frame 2a: Side 21: Opening 22: Positioning hole 221: Bevel 222: Bevel 223: Top edge 23: Slit structure 24: Guide channel D: Connecting direction H1: First aperture H2: Second aperture L: Center line W: Width direction (common use) 91: Back panel 92: Frame 93: Limiting hole 94: Positioning column.

Claims

1. A frame structure capable of increasing the stability of engagement, comprising: A back plate, comprising a bottom plate and a plurality of side plates connected to the periphery of the bottom plate, wherein a fixing structure is formed on the outer side of the side plates; and A frame is arranged in an annular manner on the back plate and includes at least one side portion, an edge of the side portion is formed with an opening and a positioning hole formed by the opening being recessed along the coupling direction, the outer contour of the positioning hole is a non-closed polygon, and the distance between the two opposite oblique sides closer to the opening gradually decreases in the direction toward the opening, and the positioning hole is detachably sleeved on the fixing structure along the coupling direction.

2. The frame structure capable of increasing the stability of engagement according to claim 1, wherein: The side portion also forms a plurality of slit structures, which are connected to the top edge of the positioning hole and are respectively arranged adjacent to the vertices on both sides of the top edge, and the top edge is used to abut against the top surface of the fixing structure.

3. The frame structure capable of increasing the stability of engagement according to claim 2, wherein: The length of each of the slit structures is L1, the length of the top edge of the positioning hole is L2, and L1>2 / 3×L2.

4. The frame structure capable of increasing the stability of engagement according to claim 2, wherein: The extending directions of the plurality of slit structures are respectively parallel to at least a plurality of sides of the positioning holes.

5. The frame structure capable of increasing the stability of engagement according to claim 1, wherein: The outer contour of the fixing structure is a closed polygon, and at least several sides of the positioning hole correspond to at least several sides of the fixing structure, so that the fixing structure and the positioning hole form multiple surface contacts.

6. The frame structure capable of increasing the stability of engagement according to claim 1, wherein: The outer contour of the fixing structure is elliptical, so that the fixing structure forms multiple point contacts with the positioning holes.

7. The frame structure capable of increasing the stability of engagement according to any one of claims 1 to 6, wherein: The positioning hole has a center line extending along the combining direction, and the lengths of the sides located on both sides of the center line decrease along the direction toward the opening of the side portion.

8. The frame structure capable of increasing the stability of engagement according to any one of claims 1 to 6, wherein: The opening has a first aperture, and the positioning hole has a second aperture, wherein the first aperture is smaller than the second aperture in a width direction perpendicular to the combining direction.

9. The frame structure capable of increasing the stability of engagement according to any one of claims 1 to 6, wherein: The side portion is further formed with a guide channel which communicates with the opening and the positioning hole. The width of the guide channel gradually decreases from the opening toward the positioning hole.

10. A backlight module, comprising: A frame structure capable of increasing the stability of engagement according to any one of claims 1 to 9; and The light emitting element is arranged between the back plate and the frame.

11. A display device, comprising: The backlight module according to claim 10; and The display panel is arranged in front of the backlight module.

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