Snap fastener, backlight module, and display device

Abstract

A snap fastener (110), a backlight module (100), and a display device. The snap fastener (110) comprises a fixing member (10) and a supporting member (20); the fixing member (10) comprises a fixing portion (11), an assembling portion (12), and a connecting portion (13); the side of the supporting member (20) facing the fixing member (10) is provided with a first recessed structure (21); the connecting portion (13) is located inside the first recessed structure (21); the outer surface of the connecting portion (13) abuts against the inner surface of the first recessed structure (21). The snap fastener (110) can be applied to the backlight module (100) to fix the position of a diffusion plate (140).

Description

Buckle, backlight module and display device

[0001] The present application claims priority to the Chinese patent application No. 202422003801.5, filed on August 16, 2024, and entitled "Buckle, backlight module and display device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of display, in particular to a buckle, a backlight module and a display device. BACKGROUND

[0003] With the evolution of optoelectronic and semiconductor technologies, flat panel displays have also been booming. Among many flat panel displays, liquid crystal displays (LCD) have been applied to various aspects of production and life due to their high space utilization efficiency, low power consumption, no radiation, low electromagnetic interference and other superior characteristics.

[0004] Liquid crystal displays are usually backlit liquid crystal displays, which include a liquid crystal display panel and a backlight module arranged oppositely. The working principle of the liquid crystal display panel is to place liquid crystal molecules between two parallel glass substrates (i.e., the color filter substrate (CF substrate) and the array substrate), and to control the liquid crystal molecules to change direction by applying electricity to the liquid crystal molecules, so as to refract the light from the backlight module to produce an image. TECHNICAL PROBLEM

[0005] The backlight module is generally divided into a side-in backlight module and a direct backlight module. The direct backlight module usually includes a back plate, a lamp plate, a diffusion plate and other components. During transportation and use of the liquid crystal display, the diffusion plate often moves and touches the liquid crystal display panel, which causes the liquid crystal display panel to be worn and the display effect of the liquid crystal display to be reduced. TECHNICAL SOLUTION

[0006] Based on this, the present application provides a buckle, a backlight module and a display device.

[0007] In a first aspect, the present application provides a buckle, comprising:

[0008] A fixing member, the fixing member comprising a fixing portion, an assembly portion and a connecting portion connected in sequence;

[0009] The support has a first recess structure on a side facing the fixing member, the connecting part is located in the first recess structure, an outer surface of the connecting part abuts with an inner surface of the first recess structure, an area of an end surface of the fixing part facing one end of the assembling part is a first end surface area, and an area of a region surrounded by an outer side edge of the support facing one end of the assembling part is a second end surface area. The first end surface area and the second end surface area are both greater than a cross-sectional area of any region of the assembling part.

[0010] In a second aspect, the embodiments of the present application provide a backlight module, comprising:

[0011] A back plate is further provided.

[0012] A lamp plate is arranged on the back plate.

[0013] A diffusion plate is arranged opposite to the back plate, and the diffusion plate is connected with the lamp plate and / or the back plate through the buckle.

[0014] The diffusion plate is provided with a through hole, at least part of the assembling part of the fixing member is located in the through hole, the fixing part of the fixing member is located on a side of the diffusion plate facing away from the back plate, the connecting part of the fixing member and the support are located on a side of the diffusion plate facing the back plate, and the support is connected with the lamp plate and / or the back plate.

[0015] In a third aspect, the embodiments of the present application provide a display device, comprising a display panel and a backlight module arranged on a light entering side of the display panel, and the backlight module is the backlight module as described above. Advantages

[0016] The buckle provided by the embodiments of the present application can be applied to fixing the position of the diffusion plate in the backlight module. The assembling part of the fixing member is arranged in the through hole by arranging the through hole on the diffusion plate. Since the areas of the end surface of the support and the end surface of the fixing part are both greater than the cross-sectional area of the assembling part and the through hole, the fixing part of the fixing member is arranged on one side of the diffusion plate, the connecting part of the fixing member and the support are arranged on the other side of the diffusion plate, so that the buckle and the diffusion plate can be fixedly connected, and the support can also support the diffusion plate. When one end of the support facing away from the fixing member is fixed on the back plate or the lamp plate, the height of the support defines the light mixing distance of the backlight module. Since the position of the diffusion plate is fixed, the problem of movement of the diffusion plate during transportation and use of the liquid crystal display can be avoided, and the problem of contact between the diffusion plate and the liquid crystal display panel to cause abrasion of the liquid crystal display panel can also be avoided, so that the display effect of the liquid crystal display can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a perspective structural schematic view of a buckle provided by an embodiment of the present application.

[0018] Fig. 2 is a structural schematic view of a fixing member of the buckle shown in Fig. 1.

[0019] Fig. 3 is a structural schematic view of a supporting member of the buckle shown in Fig. 1.

[0020] Fig. 4 is a sectional structural schematic view of the buckle shown in Fig. 1.

[0021] Fig. 5 is a first sectional structural schematic view of the buckle provided by an embodiment of the present application.

[0022] Fig. 6 is a second sectional structural schematic view of the buckle provided by an embodiment of the present application.

[0023] Fig. 7 is a flow chart of a preparation method of the buckle provided by an embodiment of the present application.

[0024] Fig. 8 is a schematic view of a state of a backlight module before a buckle and a lamp plate are connected provided by an embodiment of the present application.

[0025] Fig. 9 is a schematic view of a state of the backlight module after the buckle and the lamp plate are connected provided by an embodiment of the present application.

[0026] Element Symbol Explanation: 110, buckle; 10, fixing member; 11, fixing part; 113, third recess structure; 12, assembling part; 121, first recess; 13, connecting part; 131, first connecting section; 132, second connecting section; 133, third connecting section; 20, supporting member; 21, first recess structure; 215, first protruding part; 22, second recess structure; 100, backlight module; 120, back plate; 150, lamp plate; 151, light source; 152, circuit board; 140, diffusion plate; 141, through hole. Embodiment of the present application

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] Referring to FIGS. 1-4, the buckle 110 provided by the embodiment of the present application comprises a fixing member 10 and a supporting member 20, the fixing member 10 comprises a fixing portion 11, an assembling portion 12 and a connecting portion 13 connected in sequence, the supporting member 20 has a first recess structure 21 on the side facing the fixing member 10, the connecting portion 13 is located in the first recess structure 21, the outer surface of the connecting portion 13 abuts against the inner surface of the first recess structure 21, the area of the end surface of the fixing portion 11 facing one end of the assembling portion 12 is a first end surface area, the area of the region surrounded by the outer side edge of the supporting member 20 facing one end of the assembling portion 12 is a second end surface area, and the first end surface area and the second end surface area are both greater than the cross-sectional area of any region of the assembling portion 12.

[0029] It can be understood that when the direction from the fixing member 10 to the supporting member 20 is defined as the first direction, the cross-sectional area of the assembling portion 12 refers to the cross-sectional area obtained by cutting the assembling portion 12 in a direction perpendicular to the first direction.

[0030] Exemplarily, the first recess structure 21 is a groove.

[0031] It should be noted that the buckle 110 provided by the embodiment of the present application can be fixedly connected with the diffusion plate 140 in the following manner:

[0032] First, the diffusion plate 140 with a through hole 141 is provided, and the buckle 110 is placed above the through hole 141 of the diffusion plate 140, at this time, the fixing member 10 of the buckle 110 is above, the supporting member 20 is below and in contact with the diffusion plate 140, by pressing the fixing member 10, the pressure is conducted from the fixing member 10 to the supporting member 20, the supporting member 20 is deformed to pass through the through hole 141 on the diffusion plate 140 and enter below the diffusion plate 140, and then the supporting member 20 returns to the original state, at this time, the installation of the buckle 110 and the diffusion plate 140 is completed, after the installation is completed, the assembling portion 12 of the fixing member 10 is located in the through hole 141 of the diffusion plate 140, the fixing portion 11 of the fixing member 10 is clamped above the diffusion plate 140, and the connecting portion 13 of the fixing member 10 and the supporting member 20 are clamped below the diffusion plate 140.

[0033] The buckle 110 provided by the embodiment of the present application can be applied to fixing the position of the diffusion plate 140 in the backlight module 100. The through hole 141 is arranged on the diffusion plate 140, and the assembly part 12 of the fixing part 10 is arranged in the through hole 141. Since the area of the end surface of the supporting part 20 and the area of the end surface of the fixing part 11 are both greater than the cross-sectional area of the assembly part 12 and the through hole 141, the fixing part 11 of the fixing part 10 is clamped on one side of the diffusion plate 140, and the connecting part 13 of the fixing part 10 and the supporting part 20 are clamped on the other side of the diffusion plate 140, so that the buckle 110 and the diffusion plate 140 are fixedly connected, and the diffusion plate 140 can be supported by the supporting part 20. When the end of the supporting part 20 away from the fixing part 10 is fixed on the back plate 120 or the lamp plate 150, the height of the supporting part 20 limits the light mixing distance of the backlight module 100. Since the position of the diffusion plate 140 is fixed, the problem of movement of the diffusion plate 140 during transportation and use of the liquid crystal display can be avoided, and the problem of contact between the diffusion plate 140 and the liquid crystal display panel and the abrasion of the liquid crystal display panel can be prevented, so that the display effect of the liquid crystal display can be improved.

[0034] Exemplarily, the assembly part 12 is a column, for example, a cylinder. The cross-sectional area of any region of the assembly part 12 is uniform in the direction from the fixing part 11 to the assembly part 12.

[0035] Please refer to FIG. 1 and FIG. 4. The side of the supporting part 20 away from the fixing part 10 has a second recess structure 22. Exemplarily, the second recess structure 22 is a groove.

[0036] It should be noted that when the side of the supporting part 20 away from the fixing part 10 has the second recess structure 22, the buckle 110 can be fixed on the back plate 120 or the lamp plate 150 by pressing. During pressing of the buckle 110, the second recess structure 22 is deformed by extrusion, and the air in the accommodation space of the second recess structure 22 is discharged, so that a negative pressure is formed in the second recess structure 22, and the negative pressure adsorption between the buckle 110 and the back plate 120 or the lamp plate 150 is achieved.

[0037] Please refer to FIG. 4 and FIG. 6. In some embodiments, the surface of the fixing part 11 away from the assembly part 12 includes an arc surface protruding away from the assembly part 12.

[0038] It can be understood that when the side surface of the fixing portion 11 away from the assembling portion 12 comprises a curved surface protruding away from the assembling portion 12, the reflection angles of light rays on different areas of the curved surface are different, so that the diffusion effect of the light rays can be formed, and the uneven effect of the light rays between the area connected with the buckle 110 and other areas on the diffusion plate 140 can be avoided. Moreover, when the side surface of the fixing portion 11 away from the assembling portion 12 is a curved surface, even if the buckle 110 collides with or contacts the display panel, the curved surface of the buckle 110 is relatively smooth, so that the display panel is not easy to be abraded.

[0039] Referring to FIG. 5, in some embodiments, the fixing portion 11 comprises oppositely arranged top and bottom surfaces and a side surface arranged between the top and bottom surfaces, wherein the bottom surface is an end surface of the fixing portion 11 towards one end of the assembling portion 12, the opposite sides of the side surface are connected with the top and bottom surfaces respectively, the included angle between the side surface and the bottom surface is an acute angle, and the top surface is a plane or a curved surface protruding away from the assembling portion 12.

[0040] Exemplarily, the included angle between the side surface and the bottom surface can be 15°, 30°, 45°, 60°, 75°, 80°, etc.

[0041] It can be understood that when the side surface of the fixing portion 11 is an inclined surface (i.e. the included angle between the side surface and the bottom surface is an acute angle) and the top surface of the fixing portion 11 is a plane or a curved surface protruding away from the assembling portion 12, the reflection angles of light rays on different areas of the side surface and the top surface are different, so that the diffusion effect of the light rays can be formed, and the uneven effect of the light rays between the area connected with the buckle 110 and other areas on the diffusion plate 140 can be avoided.

[0042] Referring to FIG. 5 and FIG. 6, in some embodiments, the side of the fixing portion 11 away from the assembling portion 12 is provided with a third recess structure 113, the inner surface of the third recess structure 113 is a curved surface, or the third recess structure 113 is in the shape of a pyramid, a cone, a prism or a circular prism, and the cross-sectional area of the third recess structure 113 gradually decreases in the direction from the fixing portion 11 to the assembling portion 12.

[0043] Exemplarily, the third recess structure 113 is a groove.

[0044] It can be understood that when the third recessed structure 113 is arranged on the side of the fixing part 11 away from the assembling part 12, and the inner surface of the third recessed structure 113 is arc-shaped, or the third recessed structure 113 is in the shape of a pyramid, a cone, a prism or a circular truncated pyramid, the reflection angles of different areas on the inner surface of the third recessed structure 113 to the light are different, so that the diffusion effect of the light can be formed, and the uneven effect of the light between the area connected with the buckle 110 and other areas on the diffusion plate 140 can be avoided.

[0045] As shown in FIGS. 4-6, the side surface of the connecting part 13 is provided with a first groove 121, the inner surface of the first recessed structure 21 of the supporting part 20 is provided with a first protruding part 215, the first protruding part 215 is accommodated in the first groove 121, and the surface of the first protruding part 215 is connected with the groove surface of the first groove 121.

[0046] It can be understood that by arranging the first groove 121 on the side surface of the connecting part 13, arranging the first protruding part 215 on the inner surface of the first recessed structure 21 of the supporting part 20, and accommodating the first protruding part 215 in the first groove 121, the connecting area between the connecting part 13 and the supporting part 20 can be increased, the above structure design can make the fixing part 10 and the supporting part 20 more closely combined, and the fixing part 10 and the supporting part 20 are not easy to separate and fall off when the buckle 110 is stressed.

[0047] As shown in FIGS. 1 and 4-6, in some embodiments, the connecting part 13 includes a first connecting segment 131, a second connecting segment 132 and a third connecting segment 133 connected in sequence in the direction from the fixing part 11 to the connecting part 13, wherein the second connecting segment 132 corresponds to the first groove 121, and the cross-sectional areas of the first connecting segment 131 and the third connecting segment 133 gradually decrease in the direction from the fixing part 11 to the connecting part 13.

[0048] It can be understood that when the cross-sectional area of the connecting part 13 gradually decreases in the direction from the fixing part 11 to the connecting part 13, the overall shape of the lower end of the buckle 110 is facilitated to be constructed, and when the supporting part is injected on the outer surface of the connecting part 13, the area surrounded by the outer ring of the supporting part gradually decreases in the direction from the fixing part 11 to the connecting part 13, which is beneficial to the smooth passing of the supporting part of the buckle 110 through the through hole 141 on the diffusion plate 140 when the buckle 110 and the diffusion plate 140 are installed, so that the fixing and connecting of the buckle 110 and the diffusion plate 140 are completed.

[0049] Exemplarily, the first recess 121 is an annular groove, and the first recess 121 is arranged around the second connecting section 132.

[0050] Exemplarily, in the direction from the fixing part 11 to the connecting part 13, the cross-sectional area of the second connecting section 132 remains uniform, and in some embodiments, the second connecting section 132 is in a cylindrical shape.

[0051] Exemplarily, the materials of the fixing part 10 and the supporting part 20 are both plastic materials.

[0052] Exemplarily, the buckle 110 is prepared by using a two-shot injection molding process.

[0053] Exemplarily, the hardness of the material of the fixing part 10 is 60-70 (for example, 60, 62, 65, 68, 70, etc.), and the hardness of the material of the supporting part 20 is 30-50 (for example, 30, 32, 35, 38, 40, 42, 45, 48, 50, etc.), and the hardness value is tested according to GB / T 6783-1994 “Food Additive Gelatin”.

[0054] As can be seen, the hardness of the material of the fixing part 10 is relatively large, so that even in the process of vibration, the fixing part 10 is not easy to be pulled out of the through hole 141 of the diffusion plate 140 after the buckle 110 is fixedly connected with the diffusion plate 140, so that the buckle 110 and the diffusion plate 140 can be prevented from being separated;

[0055] The hardness of the material of the supporting part 20 is relatively low, so that in the process of installing the buckle 110 and the diffusion plate 140, the supporting part 20 can be prevented from causing abrasion to the diffusion plate 140, and it is beneficial to make the air in the accommodation space of the second recess structure 22 of the supporting part 20 be discharged in the process of pressing the buckle, so that a negative pressure is formed in the second recess structure 22, and then the buckle 110 and the back plate 120 or the lamp plate 150 are achieved by negative pressure adsorption.

[0056] Exemplarily, the haze of the material of the fixing part 10 is less than or equal to 1% (for example, 1%, 0.8%, 0.5%, 0.3%, 0.1%, 0, etc.), and the haze of the material of the supporting part 20 is 50%-70% (for example, 50%, 55%, 60%, 65%, 70%, etc.), and the haze is tested according to “Transparent Plastic Transmittance and Haze Test Method”.

[0057] It can be seen that the haze of the material of the fixing member 10 is relatively small, and the haze of the material of the supporting member 20 is relatively large, because when the buckle 110 is connected and fixed with the diffusion plate 140, the fixing member 10 is located on the light emitting surface of the diffusion plate 140, if the haze of the fixing member 10 is large, the position corresponding to the fixing member 10 on the light emitting surface of the diffusion plate 140 is prone to appear dark shadow, thereby causing the light emitting of the backlight module 100 to be non-uniform; and the haze of the material of the supporting member 20 needs to be consistent with the haze of the material of the diffusion plate 140, so that the haze of different areas of the diffusion plate 140 can be kept consistent, which is beneficial to improve the light emitting uniformity of the diffusion plate 140.

[0058] Exemplarily, the visible light transmittance of the material of the fixing member 10 is greater than or equal to 90% (for example, 90%, 92%, 95%, 98%, 100%, etc.), and the visible light transmittance of the material of the supporting member 20 is greater than or equal to 80% (for example, 80%, 83%, 85%, 87%, 90%, 92%, 95%, 98%, 100%, etc.), and the test of the visible light transmittance is performed according to the “Transparent Plastics-Transmittance and Haze Procedure”.

[0059] Exemplarily, the visible light refers to light with a wavelength of 380nm-780nm.

[0060] It can be seen that the visible light transmittance of the material of the fixing member 10 is relatively higher, because when the buckle 110 is connected and fixed with the diffusion plate 140, the fixing member 10 is located on the light emitting surface of the diffusion plate 140, if the visible light transmittance of the fixing member 10 is large, the position corresponding to the fixing member 10 on the light emitting surface of the diffusion plate 140 is prone to appear dark shadow, thereby causing the light emitting of the backlight module 100 to be non-uniform; and the visible light transmittance of the material of the supporting member 20 needs to be consistent with the visible light transmittance of the material of the diffusion plate 140, so that the visible light transmittance of different areas of the diffusion plate 140 can be kept consistent, which is beneficial to improve the light emitting uniformity of the diffusion plate 140.

[0061] Exemplarily, the refractive index of the material of the fixing member 10 is 1.43-1.48 (for example, 1.43, 1.44, 1.45, 1.46, 1.47, 1.48, etc.), and the refractive index is determined by an Abbe refractometer. That is to say, the material of the fixing member 10 has a relatively high refractive index, when the material of the fixing member 10 has a relatively high refractive index, the light diffusion effect of the fixing member 10 can be improved, thereby the light emitting uniformity of the diffusion plate 140 can be improved.

[0062] Exemplarily, the material of the fixing member 10 includes A1 component and B1 component mixed according to a mass ratio of (1-3):(1-3); the A1 component includes, in parts by weight, vinyl silicone resin 40-70 parts, vinyl silicone oil 5-15 parts, and catalyst 1-5 parts; the B1 component includes, in parts by weight, vinyl silicone resin 40-70 parts, phenyl vinyl silicone oil 5-15 parts, hydrogen-containing silicone oil 5-15 parts, inhibitor 0.02-0.2 parts.

[0063] Exemplarily, in the material of the fixing member 10, the mass ratio of the A1 component and the B1 component can be 1:3, 1:2, 1:1, 3:1, 3:2, etc.

[0064] Exemplarily, in the A1 component, the parts of vinyl silicone resin can be 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, etc., the parts of vinyl silicone oil can be 5 parts, 7 parts, 10 parts, 13 parts, 15 parts, etc., and the parts of catalyst can be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, etc.

[0065] Exemplarily, in the B1 component, the parts of vinyl silicone resin can be 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, etc., the parts of phenyl vinyl silicone oil can be 5 parts, 7 parts, 10 parts, 13 parts, 15 parts, etc., the parts of hydrogen-containing silicone oil can be 5 parts, 7 parts, 10 parts, 13 parts, 15 parts, etc., and the parts of inhibitor can be 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.13 parts, 0.15 parts, 0.18 parts, 0.2 parts, etc.

[0066] Exemplarily, the material of the support member 20 includes A2 component and B2 component mixed according to a mass ratio of (1-3):(1-3); the A2 component includes, in parts by weight, vinyl silicone resin 40-70 parts, filler 5-15 parts, vinyl silicone oil 5-15 parts, and catalyst 1-5 parts; the B2 component includes, in parts by weight, vinyl silicone resin 40-70 parts, filler 5-15 parts, vinyl silicone oil 5-15 parts, hydrogen-containing silicone oil 5-15 parts, inhibitor 0.02-0.2 parts.

[0067] It should be noted that by adding filler in the A2 component and the B2 component of the support member 20, the haze of the material of the support member 20 can be improved, so that the haze of the material of the support member 20 is close to or consistent with the haze of the material of the diffusion plate 140, and then the haze of different regions of the diffusion plate 140 can be kept consistent, which is beneficial to improving the light output uniformity of the diffusion plate 140.

[0068] Exemplarily, the mass ratio of the A2 component and the B2 component in the material of the support 20 can be 1:3, 1:2, 1:1, 3:1, 3:2, etc.

[0069] Exemplarily, in the A2 component, the amount of the vinyl silicone resin can be 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, etc., the amount of the filler can be 5 parts, 7 parts, 10 parts, 13 parts, 15 parts, etc., the amount of the vinyl silicone oil can be 5 parts, 7 parts, 10 parts, 13 parts, 15 parts, etc., and the amount of the catalyst can be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, etc.

[0070] Exemplarily, in the B2 component, the amount of the vinyl silicone resin can be 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, etc., the amount of the filler can be 5 parts, 7 parts, 10 parts, 13 parts, 15 parts, etc., the amount of the vinyl silicone oil can be 5 parts, 7 parts, 10 parts, 13 parts, 15 parts, etc., the amount of the hydrogen-containing silicone oil can be 5 parts, 7 parts, 10 parts, 13 parts, 15 parts, etc., and the amount of the inhibitor can be 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.13 parts, 0.15 parts, 0.18 parts, 0.2 parts, etc.

[0071] It should be noted that the vinyl silicone oil is a polysiloxane that remains in a liquid state at room temperature, while the vinyl silicone resin is a polysiloxane that is in a solid state at room temperature. The vinyl silicone oil is usually linear in structure, while the vinyl silicone resin is reticular in structure. In addition, the vinyl silicone oil has a relatively small molecular weight, while the vinyl silicone resin has a larger molecular weight, that is, the molecular weight of the vinyl silicone resin is greater than that of the vinyl silicone oil.

[0072] It should be noted that the difference between the phenyl vinyl silicone oil and the vinyl silicone oil is that the phenyl vinyl silicone oil contains a phenyl group, while the vinyl silicone oil does not contain a phenyl group. It should be noted that by adding the phenyl vinyl silicone oil to the material of the fixing member 10, the refractive index of the material of the fixing member 10 can be improved, thereby improving the light diffusion effect of the fixing portion 11 of the fixing member 10.

[0073] Exemplarily, the vinyl silicone oil is (CH3)2(CH2=CH)SiO 1 / 2 a capped linear structure polysiloxane.

[0074] Exemplarily, the vinyl content of the vinyl silicone oil is 0.5wt% to 2.0wt%, for example, 0.5wt%, 0.8wt%, 1.0wt%, 1.2wt%, 1.5wt%, 1.7wt%, 2.0wt%, etc.

[0075] Exemplarily, the viscosity of the vinyl silicone oil ranges from 8000 mPa·s to 20000 mPa·s, for example, 8000 mPa·s, 10000 mPa·s, 13000 mPa·s, 15000 mPa·s, 18000 mPa·s, 20000 mPa·s, or the like.

[0076] Exemplarily, the vinyl content in the vinyl silicone ranges from 0.5 wt% to 2.0 wt%, for example, 0.5 wt%, 0.7 wt%, 1.0 wt%, 1.3 wt%, 1.5 wt%, 1.7 wt%, 2.0 wt%, or the like.

[0077] Exemplarily, the catalyst includes one or more of platinum-vinylsiloxane complex, chloroplatinic acid, and platinum-alkyne complex.

[0078] Exemplarily, the inhibitor includes at least one of 3-methyl-1-butyne-3-ol, 1-ethynylcyclohexanol, tetra-vinylcyclotetrasiloxane, 2-methyl-3-butyne-2-ol, and 3,5-dimethyl-1-hexyne-3-ol.

[0079] Exemplarily, the filler includes white carbon black.

[0080] Optionally, the white carbon black is a fumed white carbon black, and the specific surface area of the fumed white carbon black ranges from 150 m 2 / g to 400 m 2 / g, for example, 150 m 2 / g, 200 m 2 / g, 250 m 2 / g, 300 m 2 / g, 350 m 2 / g, 400 m 2 / g, or the like.

[0081] It should be noted that when the specific surface area of the fumed white carbon black ranges from 150 m 2 / g to 400 m 2 / g, the surface tension of the fumed white carbon black is close to the surface tension of the resin component in the material of the support 20, and at this time, the fumed white carbon black has good compatibility with the resin component, so as to improve the dispersion uniformity of the material system of the support 20.

[0082] Referring to FIG. 7, and in combination with FIGS. 1 to 6, the application provides a preparation method of the buckle, which is used for preparing the buckle 110 in any of the above embodiments, and the preparation method includes:

[0083] S100, providing an A1 component and a B1 component, the A1 component comprising, in parts by weight, vinyl silicone resin 40-70 parts, vinyl silicone oil 5-15 parts, and catalyst 1-5 parts; the B1 component comprising, in parts by weight, vinyl silicone resin 40-70 parts, phenyl vinyl silicone oil 5-15 parts, hydrogen-containing silicone oil 5-15 parts, inhibitor 0.02-0.2 parts; mixing the A1 component and the B1 component in a mass ratio of (1-3):(1-3) to obtain a first mixture.

[0084] S200, injecting the first mixture into a first mold, and heating and curing the first mixture to form the fixing member 10.

[0085] Illustratively, the first mixture at a temperature of 50-70°C (e.g., 50°C, 55°C, 60°C, 65°C, 70°C, etc.) is injected into the first mold, and the heating and curing of the first mixture comprises heating the first mixture to a temperature of 125-145°C (e.g., 125°C, 130°C, 135°C, 140°C, 145°C, etc.) and maintaining the temperature at 125-145°C for 30-50 seconds (e.g., 30 seconds, 35 seconds, 40 seconds, 45 seconds, 50 seconds, etc.) before demolding and sampling.

[0086] It should be noted that the first mixture is in a liquid state before being injected into the first mold, and after the first mixture is injected into the first mold, the first mixture is heated by the mold to cause cross-linking polymerization of the first mixture to complete curing to obtain the fixing member 10.

[0087] S300, providing an A2 component and a B2 component, the A2 component comprising, in parts by weight, vinyl silicone resin 40-70 parts, filler 5-15 parts, vinyl silicone oil 5-15 parts, and catalyst 1-5 parts; the B2 component comprising, in parts by weight, vinyl silicone resin 40-70 parts, filler 5-15 parts, vinyl silicone oil 5-15 parts, hydrogen-containing silicone oil 5-15 parts, inhibitor 0.02-0.2 parts; mixing the A2 component and the B2 component in a mass ratio of (1-3):(1-3) to obtain a second mixture.

[0088] S400, placing the fixing member 10 in a second mold, injecting the second mixture into the second mold, and heating and curing the second mixture to form the support member 20, the support member 20 being connected to the fixing member 10 and together constituting the buckle 110.

[0089] Exemplarily, the second mixture with a temperature of 50-70℃ (e.g. 50℃, 55℃, 60℃, 65℃, 70℃, etc.) is injected into the second mold, and the heating and curing of the second mixture comprises: heating the second mixture to a temperature of 125-145℃ (e.g. 125℃, 130℃, 135℃, 140℃, 145℃, etc.) and maintaining the temperature for 20-30 seconds (e.g. 20 seconds, 23 seconds, 25 seconds, 28 seconds, 30 seconds, etc.), and then demolding and sampling.

[0090] It should be noted that the second mixture is in a liquid state before being injected into the second mold, and after the second mixture is injected into the second mold, the second mixture is heated by the mold to cause cross-linking polymerization of the second mixture to complete curing to obtain the fixing member 10.

[0091] It should be noted that the order of occurrence of S200 and S300 is not limited in the embodiments of the present application, that is, S200 can occur before or after S300, or S200 and S300 can occur simultaneously.

[0092] Referring to FIGS. 8 and 9, the backlight module 100 provided by the embodiments of the present application comprises a back plate 120, a lamp plate 150 and a diffusion plate 140, wherein the lamp plate 150 is arranged on the back plate 120, the diffusion plate 140 is arranged opposite to the back plate 120, the diffusion plate 140 is connected with the lamp plate 150 and / or the back plate 120 through the buckle 110, and the buckle 110 is the buckle 110 in any of the above embodiments or the buckle 110 prepared by the preparation method in any of the above embodiments.

[0093] The diffusion plate 140 is provided with a through hole 141, at least part of the assembly part 12 of the fixing member 10 is located in the through hole 141, the fixing part 11 of the fixing member 10 is located on the side of the diffusion plate 140 away from the back plate 120, the connecting part 13 of the fixing member 10 and the support member 20 are located on the side of the diffusion plate 140 facing the back plate 120, and the support member 20 is connected with the lamp plate 150 and / or the back plate 120.

[0094] Referring to FIGS. 8 and 9, the lamp plate 150 comprises a light source 151 and a circuit board 152 arranged on one side of the light source 151 and connected with the light source 151.

[0095] It should be noted that the buckle 110 in the backlight module 100 can be fixedly connected with the diffusion plate 140 in the following manner: first, place the buckle 110 above the through hole 141 of the diffusion plate 140, at this time, the fixing part 10 of the buckle 110 is above, the supporting part 20 is below and in contact with the diffusion plate 140, by pressing the fixing part 10, the pressure is conducted from the fixing part 10 to the supporting part 20, the supporting part 20 is deformed to pass through the through hole 141 on the diffusion plate 140 and enter below the diffusion plate 140 (as shown in FIG. 8);

[0096] As shown in FIG. 9, when the supporting part 20 enters below the diffusion plate 140, by continuously pressing the buckle 110, the second recessed structure 22 on the supporting part 20 is extruded and deformed, the air in the accommodation space of the second recessed structure 22 is discharged, thereby forming a negative pressure in the second recessed structure 22, and then the buckle 110 and the back plate 120 or the lamp plate 150 are negatively adsorbed.

[0097] Exemplarily, the side of the lamp plate 150 and / or the back plate 120 facing the diffusion plate 140 can also be provided with a reflective sheet, and the reflective sheet can be fixed on the lamp plate 150 and / or the back plate 120 by adhesive material, at this time, the supporting part 20 can be connected with the reflective sheet by negative pressure adsorption.

[0098] The display device provided by the embodiment of the present application comprises a display panel and a backlight module 100 arranged on the light entering side of the display panel, and the backlight module 100 can be the backlight module 100 in any of the above embodiments.

[0099] Exemplarily, the display panel can be a liquid crystal display panel.

[0100] The buckle, the backlight module and the display device provided by the embodiments of the present application are described in detail above. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above embodiment descriptions are only used to help understand the present application. Meanwhile, according to the idea of the present application, the specific implementation manners and application ranges will be changed by those skilled in the art, and the above description should not be understood as limiting the present application.

Claims

1. A buckle, comprising: a fixing member, comprising a fixing part, an assembling part and a connecting part connected in sequence; a supporting member, having a first recess structure on a side of the supporting member facing the fixing member, the connecting part being located in the first recess structure, an outer surface of the connecting part abutting with an inner surface of the first recess structure, an area of an end surface of the fixing part towards an end of the assembling part being a first end surface area, an area of a region surrounded by an outer side edge of the supporting member towards the end of the assembling part being a second end surface area, the first end surface area and the second end surface area being both greater than a cross-sectional area of any region of the assembling part.

2. The buckle of claim 1, wherein, a second recess structure on a side of the supporting member facing away from the fixing member.

3. The buckle of claim 1, wherein, a curved surface on a side surface of the fixing part facing away from the assembling part, the curved surface protruding in a direction away from the assembling part.

4. The buckle of claim 1, wherein, the fixing part comprising a top surface and a bottom surface arranged oppositely and a side surface arranged between the top surface and the bottom surface, wherein the bottom surface is an end surface of the fixing part towards the end of the assembling part, opposite sides of the side surface are connected with the top surface and the bottom surface respectively, an included angle between the side surface and the bottom surface is an acute angle, and the top surface is a plane or a curved surface protruding in a direction away from the assembling part.

5. The buckle of claim 1, wherein, a third recess structure on a side of the fixing part facing away from the assembling part, an inner surface of the third recess structure being a curved surface, or the third recess structure being in a shape of a pyramid, a cone, a prism or a circular prism, and a cross-sectional area of the third recess structure gradually decreasing in a direction from the fixing part to the assembling part.

6. The buckle of claim 1, wherein, a first groove on a side surface of the connecting part, a first protruding part on an inner surface of the first recess structure of the supporting member, the first protruding part being accommodated in the first groove, and a surface of the first protruding part being connected with a groove surface of the first groove.

7. The buckle of claim 6, wherein, the connecting part comprising a first connecting segment, a second connecting segment and a third connecting segment connected in sequence in a direction from the fixing part to the connecting part, wherein the second connecting segment corresponds to the first groove, and cross-sectional areas of the first connecting segment and the third connecting segment gradually decrease in the direction from the fixing part to the connecting part.

8. The buckle according to any one of claims 1-7, wherein, the fixing member and the supporting member are both made of plastic material.

9. The buckle according to any one of claims 1-7, wherein, the buckle is prepared by a two-step injection molding process.

10. The buckle according to any one of claims 1-7, wherein, a haze of the material of the fixing member being less than or equal to 1%.

11. The buckle according to any one of claims 1-7, wherein, a visible light transmittance of the material of the fixing member being greater than or equal to 90%.

12. The buckle of any one of claims 1-7, wherein, a refractive index of the material of the fixing member being 1.43-1.

48.

13. The buckle according to any one of claims 1-7, wherein, a hardness of the material of the fixing member being 60-70.

14. The buckle of any one of claims 1-7, wherein, a haze of the material of the supporting member being 50%-70%.

15. The buckle of any one of claims 1-7, wherein, a visible light transmittance of the material of the supporting member being greater than or equal to 80%.

16. The buckle of any one of claims 1-7, wherein, a hardness of the material of the supporting member being 30-50. 17.A backlight module, comprising: a back plate; a lamp plate arranged on the back plate; a diffusion plate arranged opposite to the back plate, the diffusion plate being connected with the lamp plate and / or the back plate through the buckle, the buckle being the buckle of claim 1. The diffusion plate is provided with a through hole, at least part of the assembly part of the fixing member is located in the through hole, the fixing part of the fixing member is located on the side of the diffusion plate away from the back plate, the connecting part of the fixing member and the supporting member are located on the side of the diffusion plate facing the back plate, and the supporting member is connected with the lamp plate and / or the back plate.

18. The backlight module of claim 17, wherein, The side of the supporting member away from the fixing member has a second concave structure.

19. The backlight module of claim 17, wherein, The surface of the side of the fixing part away from the assembly part comprises an arc surface protruding in a direction away from the assembly part.

20. A display device comprising a display panel and a backlight module arranged on the light-incident side of the display panel, wherein the backlight module is the backlight module according to any one of claims 17-19.

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