Silver paste circuit backlight module

Abstract

The invention relates to a notebook computer keyboard, in particular to a silver paste circuit backlight module which comprises a keyboard module and a backlight assembly arranged at the bottom of the keyboard module. The keyboard module comprises a pressing part, the bottom of the pressing part is provided with a trigger assembly for triggering a corresponding circuit contact, a plurality of supporting assemblies are arranged between the pressing part and the trigger assembly, the supporting assemblies comprise pressing assemblies, the bottoms of the pressing assemblies are provided with limiting assemblies, and transmission structures are arranged between the limiting assemblies and the pressing assemblies; according to the invention, the four limiting pieces are arranged around the supporting piece, when a user presses the key cap, the limiting pieces move towards the direction far away from the supporting piece, and then the movement of the limiting pieces of the surrounding keys is limited, so that the movement of the key cap is limited; the situation that a user presses a plurality of keycaps due to misoperation and mistakenly typewrites can be effectively avoided, and typewriting efficiency is improved.

Description

Technical Field

[0001] The invention relates to a notebook computer keyboard, in particular to a silver paste circuit backlight module. Background Art

[0002] In pursuit of thinness and lightness, the keyboard module of laptops is generally designed with a short key travel and a small overall size. However, such a design will result in a small gap between the keycap and the operation panel. When users press a keycap, they are very likely to press the adjacent keycap, resulting in operational errors and affecting typing efficiency. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a silver paste circuit backlight module, which solves the problem in the prior art that the notebook computer keyboard is prone to false touches due to the short key travel.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A silver paste circuit backlight module, comprising a keyboard module and a backlight component arranged at the bottom of the keyboard module;

[0006] The keyboard module includes a pressing portion, a trigger component for triggering a corresponding circuit contact is provided at the bottom of the pressing portion, a plurality of supporting components are provided between the pressing portion and the trigger component, the supporting component includes a pressing component, a limiting component is provided at the bottom of the pressing component, a transmission structure is provided between the limiting component and the pressing component, and when the pressing component moves, the limiting component is driven by the transmission structure to move in the direction of the surrounding supporting components;

[0007] The backlight assembly includes a silver paste circuit board assembly and a light guide plate assembly. The silver paste circuit board assembly includes a first light shielding layer, a silver paste circuit layer and a covering film. A plurality of light emitting units are arranged on the silver paste circuit layer.

[0008] Furthermore, the pressing portion is composed of a plurality of keycaps, and the pressing assembly includes a supporting member, a first hinge is provided on the top of the supporting member, a positioning member is fixedly connected to one side of the top of the supporting member, the bottom end of the first hinge is rotatably connected to the positioning member, a second hinge is rotatably connected to one side of the first hinge, the other side of the top of the supporting member is fixedly connected to the positioning portion, the bottom end of the second hinge is fixedly connected to a sliding rod, the sliding rod slides inside the positioning portion, and the keycap is at the top position of the first hinge and the second hinge.

[0009] Furthermore, a clamping block is fixedly connected to one side of the bottom of the keycap, an insertion rod is fixedly connected to the top of the second hinge, the insertion rod and the clamping block are plug-fitted together, a limiting piece is fixedly connected to the other side of the bottom of the keycap, a sliding piece is fixedly connected to the top of the first hinge, and the sliding piece slides in the limiting piece.

[0010] Furthermore, the limiting component includes four limiting plates, and the four limiting plates are arranged around the supporting member.

[0011] Furthermore, a rotating gear is provided for internal rotation of the support member, and a first gear plate, a second gear plate, a third gear plate and a fourth gear plate are provided on the side wall of the rotating gear, and the first gear plate, the second gear plate, the third gear plate and the fourth gear plate are all meshed with the rotating gear, and the first gear plate, the second gear plate, the third gear plate and the fourth gear plate are respectively fixedly connected to a limiting plate.

[0012] Furthermore, a pushing member is provided on one side of the bottom end of the second hinge, the second hinge and the pushing member are in contact with each other, and the pushing member is fixedly connected to one of the limiting plates.

[0013] Furthermore, an elastic sheet is fixedly connected to one side of the limiting sheet, and the elastic sheet is used to provide a restoring elastic force to the limiting sheet when the limiting sheet moves in a direction away from the supporting member.

[0014] Furthermore, the light guide plate assembly includes a first adhesive layer, a light guide layer, a second adhesive layer, a reflective layer, a substrate, a second light shielding layer and a third adhesive layer, and the first adhesive layer, light guide layer, the second adhesive layer, the reflective layer, the substrate, the second light shielding layer and the third adhesive layer are stacked in sequence.

[0015] Furthermore, a support plate is provided inside the limiting plate, and the support plate includes a sliding block, and the sliding block is hinged to the elastic plate. A sliding groove is provided on one side of the limiting plate, and the sliding block is slidably arranged inside the sliding groove. A threaded rod is rotatably arranged inside the sliding groove, and the threaded rod passes through the sliding block and cooperates with the sliding block thread. A gear assembly is provided at one end of the threaded rod, and the gear assembly consists of two mutually meshing and perpendicular bevel gears and a driving gear, one of the bevel gears is fixedly connected to the threaded rod, and the other bevel gear is fixedly connected to the driving gear, and a driven gear plate is meshed with one side of the driving gear, and the driven gear plate is fixedly connected to the support member.

[0016] Furthermore, one side of the sliding block is fixedly connected to an elastic member, and one end of the elastic member is fixedly connected to the elastic sheet.

[0017] Compared with the prior art, the present invention provides a silver paste circuit backlight module, which has the following beneficial effects:

[0018] 1. The present invention sets four limiting plates around the support member. When the user presses the keycap, the limiting plate moves away from the support member, and then limits the movement of the limiting plates of the surrounding keys, thereby completing the limitation of the movement of the keycap. This can effectively prevent the user from making typos due to pressing multiple keycaps due to operational errors, thereby improving typing efficiency.

[0019] 2. The present invention can effectively improve the effect of removing impurities between the two limiting plates by pressing the keycap to make the elastic plate slide on one side of the limiting plate. Under the action of the elastic member, a movable space is left for the two elastic plates when they are in contact, which can effectively protect the elastic plates and avoid damage, thereby extending the service life.

[0020] 3. In the present invention, through the cooperation between the second hinge and the first hinge, when the user presses the keycap to move it downward, the keycap can always keep moving downward steadily without shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the keyboard module of the present invention;

[0024] Figure 3 It is one of the structural schematic diagrams of the support assembly of the present invention;

[0025] Figure 4 This is the second structural schematic diagram of the support assembly of the present invention;

[0026] Figure 5 A top view of the arrangement of the support assembly of the present invention;

[0027] Figure 6 is one of the top views of the elastic sheet of the present invention;

[0028] Figure 7 The second top view of the elastic sheet of the present invention;

[0029] Figure 8 It is a schematic diagram of the exploded structure of the backlight assembly of the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure of A of the present invention;

[0031] Fig.10 It is a structural schematic diagram of the light-emitting unit of the present invention;

[0032] Fig.11 It is a schematic structural diagram of the cleaning device of the present invention.

[0033] The meaning of each mark in the figure is:

[0034] 1. Keyboard module; 2. Backlight assembly;

[0035] 11. Pressing part; 12. Support assembly; 13. Support plate; 14. Rubber part; 15. Cleaning device;

[0036] 111a, a card block; 111b, a limiting member;

[0037] 121, support member; 1211, positioning portion; 122, first hinge member; 123, second hinge member; 124, limiting plate; 125, elastic plate; 126, pushing member; 127, rotating gear; 127a, first gear plate; 127b, second gear plate; 127c, third gear plate; 127d, fourth gear plate;

[0038] 151, slide groove; 152, sliding block; 153, threaded rod; 154, elastic member; 155, gear assembly; 156, driven gear plate;

[0039] 21. first light shielding layer; 22. silver paste circuit layer; 23. cover film; 24a. first adhesive layer; 24b. second adhesive layer; 24c. third adhesive layer; 25. light guiding layer; 26. light reflecting layer; 27. substrate; 28. second light shielding layer;

[0040] 221. Light-emitting unit. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0042] Those skilled in the art can understand that all or part of the steps in the following embodiments can be completed by instructing the relevant hardware through a program, so the present application can be in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application can be in the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0043] The keyboard backlight module of a laptop is an important component of the laptop. Since laptops are generally thin and light, the key travel of the keyboard is generally designed to be short, and each key is close to the operation panel. Therefore, when users are typing, it is very easy to press two or more keys at the same time, which affects the typing speed. For this reason, please refer to Figure 1-Figure 7 The first embodiment of the present invention provides a silver paste circuit backlight module, including a keyboard module 1 and a backlight component 2 arranged at the bottom of the keyboard module 1. Specifically, the keyboard module 1 is used to support the typing function of the notebook computer, and the backlight component 2 is used to support the function of providing a light source to the keyboard module 1, ensuring that the keyboard module 1 is in a light-emitting state, so as to prevent the user from not being able to see the keyboard keys clearly in a dim environment;

[0044] Among them, the keyboard module 1 includes a pressing part 11, and a trigger component for triggering a corresponding circuit contact is provided at the bottom of the pressing part 11. Specifically, in order to support the laptop computer to realize the typing function, the trigger component includes a support plate 13, and a plurality of trigger holes are opened on the surface of the support plate 13. A rubber member 14 is provided at the bottom of the support plate 13, and a plurality of rubber domes are provided on the top of the rubber member 14. The plurality of rubber domes and the plurality of trigger holes are arranged in a one-to-one correspondence; specifically, the support plate 13 and the rubber member 14 are installed in a close fit so that each rubber dome passes through the trigger hole, and the support plate 13 can be used as a platform for supporting the pressing part 11. In addition, a convex point is provided at the bottom of each rubber dome on the rubber member 14. When the rubber dome is in a fully retracted state, the convex point will contact the corresponding circuit contact to form a closed circuit, thereby triggering a key input.

[0045] A plurality of support components 12 are provided between the pressing portion 11 and the trigger component. The support components 12 include a pressing component, specifically, Figure 2-Figure 4As shown, the pressing part 11 is composed of a plurality of keycaps. When the user presses the keycap, in order to improve durability and provide a stable pressing experience, the pressing assembly includes a support member 121. A first hinge 122 is provided on the top of the support member 121. A positioning member is fixedly connected to one side of the top of the support member 121. The bottom end of the first hinge 122 is rotatably connected to the positioning member. A second hinge 123 is rotatably connected to one side of the first hinge 122. A positioning portion 1211 is fixedly connected to the other side of the top of the support member 121. A sliding rod is fixedly connected to the bottom end of the second hinge 123. The sliding rod is inside the positioning portion 1211. Sliding, the keycap is at the top position of the first hinge 122 and the second hinge 123; specifically, the support member 121 serves as a supporting component to determine the basic position of the first hinge 122 and the second hinge 123, and the positioning member limits the bottom position of the first hinge 122 so that it can only rotate along the axis of the positioning member. When the user presses the keycap to move it downward, the second hinge 123 and the top position of the first hinge 122 move downward, and the first hinge 122 rotates along the axis of the positioning member. The sliding rod slides inside the positioning portion 1211, so that the keycap can move downward smoothly.

[0046] In this embodiment, through the cooperation between the second hinge 123 and the first hinge 122 , when the user presses the keycap to move it downward, the keycap can always keep moving downward steadily without shaking.

[0047] As a further implementation of this embodiment, in order to prevent the keycap from falling off easily during use, a clamping block 111a is fixedly connected to one side of the bottom of the keycap, a plug rod is fixedly connected to the top of the second hinge 123, the plug rod and the clamping block 111a are plugged together, a limiting member 111b is fixedly connected to the other side of the bottom of the keycap, and a sliding member is fixedly connected to the top of the first hinge 122, and the sliding member slides in the limiting member 111b; specifically, in order to facilitate installation and disassembly and ensure that the keycap is not easy to fall off during use, the clamping block 111a is fixedly connected to one side of the bottom of the keycap, and a plug rod is fixedly connected to the top of the second hinge 123, and the plug rod and the clamping block 111a are plugged together. Block 111a is a plastic component with a certain elasticity. An opening is provided at the bottom of block 111a. The insertion rod can enter the interior of block 111a through the opening and be plugged into block 111a. When the user presses the keycap to move downward, with the cooperation of block 111a and the insertion rod, the second hinge 123 rotates along the axis of block 111a, and slides in the sliding member and the limiting member 111b, so that the keycap can always move in the direction of the vertical support plate 13, avoiding the keycap from tilting and shaking during the movement, thereby improving the user experience.

[0048] A limiting component is provided at the bottom of the pressing component; specifically, during the user's typing process, due to the pursuit of lightness and the need to reduce the size of the laptop computer, the size of the keycap is generally designed to be small, and the gap between the top of the keycap and the operation panel of the laptop computer is small, which makes it easy for the user to press the wrong keycap, resulting in affecting the typing efficiency. Therefore, the limiting component includes four limiting pieces 124, and the four limiting pieces 124 are arranged around the support member 121; specifically, when the user presses the keycap to move downward, the four limiting pieces 124 are all moved in the direction away from the support member 121, and finally touch the limiting piece 124 of the adjacent key. At this time, the keycap corresponding to the adjacent limiting piece 124 cannot be pressed at this time, thereby avoiding the phenomenon that the user presses a keycap and accidentally presses other keycaps when typing, thereby affecting the typing effect.

[0049] A transmission structure is provided between the limiting component and the pressing component. When the pressing component moves, the limiting component is driven to move in the direction of the surrounding supporting component 12 through the transmission structure. Specifically, in order to make the limiting plate 124 and the key cap move synchronously, a rotating gear 127 is provided inside the supporting member 121. The side wall of the rotating gear 127 is provided with a first gear plate 127a, a second gear plate 127b, a third gear plate 127c and a fourth gear plate 127d. The first gear plate 127a, the second gear plate 127b, the third gear plate 127c and the fourth gear plate 127d are provided. The first gear plate 127a, the second gear plate 127b, the third gear plate 127c and the fourth gear plate 127d are all meshed with the rotating gear 127, and the first gear plate 127a, the second gear plate 127b, the third gear plate 127c and the fourth gear plate 127d are respectively fixedly connected to a limiting plate 124, and a pusher 126 is provided on one side of the bottom end of the second hinge 123, and the second hinge 123 and the pusher 126 are fitted, and the pusher 126 is fixedly connected to one of the limiting plates 124. Specifically, when the key cap is pressed to move downward, the second hinge 123 drives the slide bar to move in the positioning portion. 1211 slides, at this time the second hinge 123 pushes the pusher 126 to move in the direction of the principle support member 121, the pusher 126 drives one of the limiting pieces 124 to move, the limiting piece 124 drives the rotating gear 127 to rotate through the third gear plate 127c, the rotating gear 127 drives the first gear plate 127a, the second gear plate 127b and the third gear plate 127c to move synchronously, thereby making the other limiting pieces 124 move synchronously in the direction away from the support member 121, and finally move with the limiting pieces of the surrounding buttons. The sheet 124 fits well, and since the first gear plate 127a, the second gear plate 127b, the third gear plate 127c and the fourth gear plate 127d are all engaged with the rotating gear 127, as long as one of the first gear plate 127a, the second gear plate 127b, the third gear plate 127c and the fourth gear plate 127d cannot move, the others cannot move either. Therefore, the pushing member 126 will limit the movement of the second hinge member 123, thereby preventing the corresponding keycap from moving downward, thereby avoiding the phenomenon of accidental touch.

[0050] As a further implementation of this embodiment, since the keycap of the laptop computer is reset by the elasticity of the rubber dome after being pressed, the pressing feel is average, and the elasticity gradually deteriorates with the increase of the use time, and the pressing feel will gradually deteriorate with the aging of the material, and since the limiting piece 124 will move on the surface of the support plate 13, and if it cannot move, the keycap cannot be pressed, so if a foreign object is stuck between the limiting pieces 124 of two keys, the corresponding two keycaps will be unusable. Therefore, an elastic piece 125 is fixedly connected to one side of the limiting piece 124, and the elastic piece 125 is used to give the limiting piece 124 a restoring elastic force when it moves away from the support member 121. Specifically, the elastic piece 125 is made of an elastic material and is fitted with the surrounding limiting pieces 124. When the keycap is pressed to move downward, the limiting piece 124 overcomes the elastic movement of the elastic piece 125, causing the elastic piece 125 to deform, which can give the keycap an additional upward elastic force, improve the pressing feel, and extend the service life;

[0051] In addition, one end of the elastic sheet 125 away from the support member 121 will sweep a distance between the limiting sheets 124 of the two buttons. When a foreign object is stuck between the limiting sheets 124 of the two buttons, it will be swept away. However, the swept area is limited. The angle and number of the two ends of the elastic sheet 125 can be adjusted to ensure that the elastic sheet 125 fits the surrounding limiting sheets 124, so that when a foreign object is stuck between the limiting sheets 124 of the two buttons, it can be swept away. Therefore, Figure 6-Figure 7 As shown, in the present invention, the angle between the two ends of the elastic piece 125 ranges from 120 degrees to 160 degrees.

[0052] It should be noted that by setting four limiting plates 124 around the support member 121, when the user presses the keycap, the limiting plate 124 moves in the direction away from the support member 121, and then limits the movement of the limiting plates 124 of the surrounding keys, thereby completing the limitation of the movement of the keycap, which can effectively prevent the user from making typos due to pressing multiple keycaps due to operational errors, thereby improving typing efficiency.

[0053] As a further implementation of this embodiment, please refer to Figure 8-Figure 10 The backlight assembly 2 includes a silver paste circuit board assembly and a light guide plate assembly. The silver paste circuit board assembly includes a first shading layer 21, a silver paste circuit layer 22 and a covering film 23. The silver paste circuit layer 22 is provided with a plurality of light-emitting units 221. Specifically, the first shading layer 21 is used to block parts that do not need to be transparent to prevent the occurrence of stray light, thereby improving the uniformity and contrast of the backlight. The silver paste circuit layer 22 is printed with silver paste and is used to connect various LED lights and other electronic components in the laptop keyboard. The covering film 23 is used to reflect the light source and improve the utilization rate of the light source.

[0054] As a further implementation of this embodiment, the light-emitting unit 221 is a five-sided LED with no light-emitting electrode surface. Fig.10 As shown, it should be noted that the five-sided LED can ensure the brightness of the light-emitting unit 221.

[0055] As a further implementation of the present embodiment, the light guide plate assembly includes a first adhesive layer 24a, a light guide layer 25, a second adhesive layer 24b, a reflective layer 26, a substrate 27, a second light shielding layer 28 and a third adhesive layer 24c. The first adhesive layer 24a, the light guide layer 25, the second adhesive layer 24b, the reflective layer 26, the substrate 27, the second light shielding layer 28 and the third adhesive layer 24c are stacked in sequence. Specifically, the first adhesive layer 24a, the second adhesive layer 24b and the third adhesive layer 24c are used to enhance stability and prevent light leakage, and to seal the gap between two adjacent layer structures to avoid dust. In addition, the first adhesive layer 24a, the second adhesive layer 24b and the third adhesive layer 24c also have certain thermal conductivity, which helps to conduct away the heat generated by components such as the light-emitting unit 221 to assist in heat dissipation.

[0056] The light guide layer 25 is used to evenly diffuse the light emitted by the light emitting unit 221 at the bottom, so that the light can evenly illuminate the entire keyboard area;

[0057] The reflective layer 26 is used to reflect the unused light after passing through the light guide layer 25, thereby improving the utilization rate of the light source and enhancing the overall brightness;

[0058] The substrate 27 serves as the underlying support material, providing mechanical strength and stability;

[0059] The second light shielding layer 28 is used to prevent unnecessary light from passing through.

[0060] It should be noted that the third adhesive layer 24 c and the rubber member 14 are fixedly connected.

[0061] Please refer to Figure 11. The purpose of the second embodiment of the present invention is to use only the elastic sheet 125 to clean the impurities. Due to its limited length, the impurities cannot be cleaned. Therefore, a cleaning device 15 is provided inside the limiting sheet 124. The cleaning device 15 includes a sliding block 152. The sliding block 152 and the elastic sheet 125 are hinged. A sliding groove 151 is provided on one side of the limiting sheet 124. The sliding block 152 is slidably arranged inside the sliding groove 151. A threaded rod 153 is rotatably arranged inside the sliding groove 151. The threaded rod 153 penetrates the sliding block 152 and is threadedly matched with the sliding block 152. A gear assembly 155 is provided at one end of the threaded rod 153. The gear assembly 155 It consists of two mutually meshing and perpendicular bevel gears and a driving gear, wherein one bevel gear is fixedly connected to the threaded rod 153, and the other bevel gear is fixedly connected to the driving gear. A driven tooth plate 156 is meshed on one side of the driving gear, and the driven tooth plate 156 is fixedly connected to the support member 121. Specifically, when the keycap is pressed to move downward, the limiting plate 124 moves away from the support member 121, and the driven tooth plate 156 and the driving gear inside it cooperate to rotate it. The driven tooth plate 156 rotates the threaded rod 153 through the two bevel gears, thereby causing the sliding block 152 to slide along the inside of the slide groove 151. At this time, the elastic sheet 125 can scrape off impurities between the two limiting sheets 124.

[0062] However, if one of the elastic sheets 125 touches the other elastic sheet 125 during movement, the elasticity of the elastic sheet 125 is likely to be damaged. Therefore, an elastic member 154 is fixedly connected to one side of the sliding block 152, and one end of the elastic member 154 is fixedly connected to the elastic sheet 125. Specifically, the elastic member 154 can give the elastic sheet 125 an elastic force. When the two elastic sheets 125 are in contact, the elastic member 154 can give the elastic sheet 125 a space to move, thereby avoiding damage to the elastic sheet 125 and extending its service life.

[0063] By pressing the keycap to make the elastic sheet 125 slide on one side of the limiting sheet 124, the effect of removing impurities between the two limiting sheets 124 can be effectively improved. Under the action of the elastic member 154, a movable space is left for the two elastic sheets 125 when they are in contact, which can effectively protect the elastic sheets 125 and avoid damage, thereby extending the service life.

[0064] The above implementation methods have been described in detail. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A silver paste circuit backlight module, characterized in that: It comprises a keyboard module (1) and a backlight assembly (2) arranged at the bottom of the keyboard module (1); The keyboard module (1) comprises a pressing portion (11), a triggering component for triggering a corresponding circuit contact is provided at the bottom of the pressing portion (11), a plurality of supporting components (12) are provided between the pressing portion (11) and the triggering component, the supporting component (12) comprises a pressing component, a limiting component is provided at the bottom of the pressing component, a transmission structure is provided between the limiting component and the pressing component, and when the pressing component moves, the limiting component is driven by the transmission structure to move in the direction of the surrounding supporting components (12); The backlight assembly (2) comprises a silver paste circuit board assembly and a light guide plate assembly, the silver paste circuit board assembly comprises a first light shielding layer (21), a silver paste circuit layer (22) and a covering film (23), and a plurality of light-emitting units (221) are arranged on the silver paste circuit layer (22).

2. The silver paste circuit backlight module according to claim 1, characterized in that: The pressing portion (11) is composed of a plurality of key caps, and the pressing assembly includes a supporting member (121), a first hinge (122) is provided at the top of the supporting member (121), a positioning member is fixedly connected to one side of the top of the supporting member (121), the bottom end of the first hinge (122) is rotatably connected to the positioning member, a second hinge (123) is rotatably connected to one side of the first hinge (122), a positioning portion (1211) is fixedly connected to the other side of the top of the supporting member (121), a sliding rod is fixedly connected to the bottom end of the second hinge (123), the sliding rod slides inside the positioning portion (1211), and the key cap is located at the top position of the first hinge (122) and the second hinge (123).

3. The silver paste circuit backlight module according to claim 2, characterized in that: A clamping block (111a) is fixedly connected to one side of the bottom of the keycap, an insertion rod is fixedly connected to the top of the second hinge (123), the insertion rod and the clamping block (111a) are plug-fitted, a limiting member (111b) is fixedly connected to the other side of the bottom of the keycap, and a sliding member is fixedly connected to the top of the first hinge (122), and the sliding member slides in the limiting member (111b).

4. The silver paste circuit backlight module according to claim 2, characterized in that: The limiting component comprises four limiting plates (124), and the four limiting plates (124) are arranged around the supporting member (121).

5. The silver paste circuit backlight module according to claim 4, characterized in that: The support member (121) is internally rotatably provided with a rotating gear (127), and the side wall of the rotating gear (127) is provided with a first gear plate (127a), a second gear plate (127b), a third gear plate (127c) and a fourth gear plate (127d), and the first gear plate (127a), the second gear plate (127b), the third gear plate (127c) and the fourth gear plate (127d) are all meshed with the rotating gear (127), and the first gear plate (127a), the second gear plate (127b), the third gear plate (127c) and the fourth gear plate (127d) are respectively fixedly connected to a limiting plate (124).

6. The silver paste circuit backlight module according to claim 4, characterized in that: A pushing member (126) is provided on one side of the bottom end of the second hinged member (123), the second hinged member (123) and the pushing member (126) are in close contact with each other, and the pushing member (126) is fixedly connected to one of the limiting plates (124).

7. The silver paste circuit backlight module according to claim 4, characterized in that: An elastic sheet (125) is fixedly connected to one side of the limiting sheet (124), and the elastic sheet (125) is used to provide a restoring elastic force to the limiting sheet (124) when the limiting sheet (124) moves in a direction away from the supporting member (121).

8. The silver paste circuit backlight module according to claim 1, characterized in that: The light guide plate assembly comprises a first adhesive layer (24a), a light guide layer (25), a second adhesive layer (24b), a reflective layer (26), a substrate (27), a second light shielding layer (28) and a third adhesive layer (24c), wherein the first adhesive layer (24a), the light guide layer (25), the second adhesive layer (24b), the reflective layer (26), the substrate (27), the second light shielding layer (28) and the third adhesive layer (24c) are stacked in sequence.

9. The silver paste circuit backlight module according to claim 1, characterized in that: A support plate (13) is provided inside the limiting plate (124), and the support plate (13) includes a sliding block (152), and the sliding block (152) and the elastic plate (125) are hinged. A sliding groove (151) is provided on one side of the limiting plate (124), and the sliding block (152) is slidably arranged inside the sliding groove (151). A threaded rod (153) is rotatably arranged inside the sliding groove (151), and the threaded rod (153) passes through the sliding block (152) and is hinged with the sliding block (152). The movable block (152) is threadedly engaged, and a gear assembly (155) is provided at one end of the threaded rod (153). The gear assembly (155) consists of two mutually meshing and perpendicular bevel gears and a driving gear, wherein one of the bevel gears is fixedly connected to the threaded rod (153), and the other bevel gear is fixedly connected to the driving gear. A driven gear plate (156) is meshed on one side of the driving gear, and the driven gear plate (156) is fixedly connected to the support member (121).

10. The silver paste circuit backlight module according to claim 9, characterized in that: An elastic member (154) is fixedly connected to one side of the sliding block (152), and one end of the elastic member (154) is fixedly connected to the elastic sheet (125).

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