A novel waterproof and dustproof conductive film structure for keyboards

Abstract

This application belongs to the technical field of keyboard conductive film structure, and discloses a novel waterproof and dustproof keyboard conductive film structure, including a conductive film body for use with a keyboard base. The conductive film body is provided with a connecting component to facilitate connection between the conductive film body and the keyboard base. The connecting component includes an upper frame disposed on the top of the conductive film body and distributed around its edge, a lower frame disposed on the bottom of the conductive film body and distributed around its edge, an upper connecting unit for fixing the lower frame to the upper frame, and a lower connecting unit for connecting the lower frame to the keyboard base. This application enables rapid installation of the conductive film body without drilling holes, eliminating the cumbersome drilling process and ensuring efficient installation.

Description

Technical Field

[0001] This utility model relates to the technical field of keyboard conductive film structure, and in particular to a novel waterproof and dustproof keyboard conductive film structure. Background Technology

[0002] A conductive membrane on a keyboard is a thin film located inside the keyboard. It is one of the core components of keyboard input, enabling key input through contact with metal contacts. The main function of the conductive membrane is to transmit input signals by facilitating key input through contact between its conductive contacts and metal contacts. The contacts on the conductive membrane are typically made of conductive paste, which conducts current when it touches the metal contacts, thus completing the input operation.

[0003] Chinese utility model patent CN213936017U discloses a waterproof conductive film for keyboards, comprising an upper PET film, a middle PET film, and a lower PET film arranged sequentially from top to bottom. The lower surface of the upper PET film is sequentially printed with upper conductive lines, a first insulating ink layer, and a first waterproof adhesive layer, with the first waterproof adhesive layer completely covering the upper conductive lines and the first insulating ink layer. The upper surface of the lower PET film is sequentially printed with lower conductive lines, a second insulating ink layer, and a second waterproof adhesive layer, with the second waterproof adhesive layer completely covering the lower conductive lines and the second insulating ink layer. An FPC circuit board connected to the lower conductive lines is provided on one side of the lower PET film. Multiple positioning holes aligned vertically are provided on the upper, middle, and lower PET films.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: When installing conductive films, multiple positioning holes need to be set on the upper, middle, and lower PET films. The upper, middle, and lower PET films are all relatively soft film materials, making it difficult to open positioning holes on their surfaces, which increases the processing difficulty of conductive films. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a novel waterproof and dustproof conductive film structure for keyboards.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a novel waterproof and dustproof keyboard conductive film structure, comprising a conductive film body for use with a keyboard base, wherein the conductive film body is provided with a connecting component for facilitating the connection between the conductive film body and the keyboard base, the connecting component comprising an upper frame disposed on the top of the conductive film body and distributed around the edge of the conductive film body, a lower frame disposed on the bottom of the conductive film body and distributed around the edge of the conductive film body, an upper connecting unit for fixing the lower frame to the upper frame, and a lower connecting unit for connecting the lower frame to the keyboard base.

[0007] By adopting the above technical solution, when installing the conductive film structure, the staff only needs to use the lower connecting unit to connect the lower frame to the keyboard base. Then, the conductive film body is placed on top of the lower frame, and the lower frame is made to fit as close as possible to the side of the conductive film body. After that, the staff needs to cover the upper frame and use the upper connecting unit to fix the lower frame to the upper frame. This changes the traditional method of using a drilling tool to drill holes in the soft film material, eliminating the tedious drilling action and ensuring the installation efficiency of the conductive film structure.

[0008] Furthermore, the four sets of lower connecting units are respectively located on the four sides of the lower frame. The number of upper connecting units is equal to the number of lower connecting units and their positions correspond one-to-one. The lower connecting unit includes a connecting post fixed to the top of the keyboard base and a connecting sleeve fixed to the bottom of the lower frame and engaging with the connecting post. The cross-section of the connecting post is semi-circular, and the center of the connecting post is higher than the keyboard base. The distance between the two sides of the bottom of the connecting sleeve is less than the diameter of the connecting post, and the bottom of the connecting sleeve is lower than the center of the connecting post.

[0009] By adopting the above technical solution, when installing the lower frame, the staff only needs to align the four connecting sleeves with the four connecting posts respectively, and press the lower frame from top to bottom to make the connecting sleeves and connecting posts snap together and fix them.

[0010] Furthermore, the upper connecting unit includes a mounting strip fixed to the side of the lower frame and a buckle fixed to the top of the mounting strip. The buckle has an isosceles trapezoidal cross-section, and the inclined surface at the bottom of the buckle is engaged with the edge of the upper frame.

[0011] By adopting the above technical solution, when the conductive film body is placed on the top of the lower frame and the upper frame needs to be installed, the staff only needs to align the side of the upper frame with the side of the lower frame and press the upper frame from top to bottom. This will cause the buckle to deform towards the side away from the center of the upper frame. Then, the bevel at the bottom of the buckle will engage with the edge of the upper frame, thereby completing the operation of fixing the conductive film body to the keyboard base.

[0012] Furthermore, the upper connecting unit includes a connecting strip fixed to the bottom of the upper frame and an elastic clip fixed to the bottom of the connecting strip. The cross-section of the elastic clip is an inverted "Ω" shape. The top of the lower frame is provided with a snap-fit ​​groove that engages with the elastic clip. A flared chamfer is provided at the intersection between the top of the lower frame and the inner wall of the snap-fit ​​groove.

[0013] By adopting the above technical solution, when installing the upper frame, the staff only needs to align the position of the elastic clip with the slot and press the upper frame from top to bottom to make the elastic clip engage with the slot, thus easily completing the operation of connecting the upper and lower frames to clamp the conductive film body.

[0014] Furthermore, an annular protrusion is fixedly provided at the bottom of the upper frame, and an annular groove that cooperates with the annular protrusion is provided at the top of the lower frame. The annular protrusion and the annular groove cooperate with each other and abut against the conductive film body.

[0015] By adopting the above technical solution, the interaction between the annular protrusion and the annular groove enhances the fit between the upper and lower frame and the clamping degree of the conductive film body, which is beneficial to improving the stability of the conductive film body in use.

[0016] Furthermore, rectangular blocks are fixed at the four corners of the top of the keyboard base, with the top of the rectangular blocks abutting against the bottom of the lower frame.

[0017] By adopting the above technical solution, when the staff installs the bottom frame, the rectangular block fixed on the keyboard base provides a certain support effect. During the use of the conductive film structure, the rectangular block provides structural support for the bottom frame, which helps to improve the stability of the conductive film structure during use.

[0018] Furthermore, an annular indicator strip for indicating the installation position of the conductive film body is fixedly provided at the top of the lower frame.

[0019] By adopting the above technical solution, when workers are installing the conductive film body, they can quickly determine the installation position of the conductive film body according to the instructions of the ring indicator bar, which speeds up the process of matching the upper and lower frames and fixing the conductive film body.

[0020] Furthermore, a silicone button and a dustproof plate are provided on the top of the conductive film body. A through hole is provided on the dustproof plate to abut against the outer wall of the silicone button, and the side wall of the dustproof plate abuts against the inner side wall of the upper frame.

[0021] By adopting the above technical solution, dust and water can easily enter the interior of the conductive film body during keyboard use. The dustproof plate set at the top can block most of the dust. Since the silicone keys and the dustproof plate are pressed against each other, they also have a certain blocking effect on external water, thus reducing the failure rate of the conductive film body.

[0022] Furthermore, the top of the keyboard base is fixedly provided with multiple support grids, and an integrated circuit board is provided between the bottom of the conductive film body and the top of the multiple support grids. The multiple support grids are misaligned with the keys on the keyboard base.

[0023] By adopting the above technical solution, multiple support grids work together to support the integrated circuit board when the keyboard is used, reducing the probability of damage to the conductive film body due to prolonged key pressing.

[0024] In summary, this utility model has the following beneficial effects:

[0025] In this application, when installing the conductive film structure, the worker only needs to connect the lower frame to the keyboard base, then place the conductive film body on top of the lower frame, making the lower frame fit as close as possible to the side of the conductive film body. After that, the worker needs to cover the upper frame and use the upper connecting unit to fix the lower frame to the upper frame. This changes the traditional method of using a drilling tool to drill holes in the soft film material, eliminating the tedious drilling action and ensuring the installation efficiency of the conductive film structure. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0027] Figure 2 yes Figure 1 A structural diagram from another perspective after removing the dust cover and silicone buttons;

[0028] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is an exploded view of the conductive film structure of the waterproof and dustproof keyboard in Embodiment 1 of this utility model;

[0030] Figure 5 This is a cross-sectional structural diagram of Embodiment 1 of the present invention to highlight the connecting component;

[0031] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0032] Figure 7 This is a cross-sectional structural diagram of Embodiment 2 of the present invention to highlight the connecting component;

[0033] Figure 8 yes Figure 7 Enlarged diagram of point C in the middle.

[0034] In the diagram: 1. Keyboard base; 11. Conductive film body; 12. Rectangular block; 2. Connecting component; 21. Top frame; 22. Bottom frame; 221. Annular groove; 222. Snap-fit ​​groove; 223. Flared chamfer; 23. Lower connecting unit; 231. Connecting post; 232. Connecting sleeve; 24. Upper connecting unit; 241. Mounting strip; 242. Buckle; 243. Connecting strip; 244. Elastic clip; 3. Annular protrusion; 4. Integrated circuit board; 5. Silicone keys; 6. Dustproof plate; 61. Through hole; 7. Annular indicator strip; 8. Support grid. Detailed Implementation

[0035] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] Example 1

[0037] like Figure 1-6 As shown in the figure, this application discloses a novel waterproof and dustproof conductive film structure for a keyboard, including a conductive film body 11. The conductive film body 11 is disposed on the keyboard base 1 and works in conjunction with the keyboard base 1. The structure of the conductive film body 11 is prior art, specifically consisting of an upper conductive layer, a middle insulating layer, and a lower conductive layer. Pressing a key causes the upper and lower conductive layers to contact, thereby forming a circuit loop and triggering the corresponding key function. The structure and operating principle of the conductive film body 11 are conventional technologies and are only briefly described here. Multiple support grids 8 are fixed to the top of the keyboard base 1, and the multiple support grids 8 are staggered with the keys on the keyboard base 1.

[0038] The conductive film body 11 is provided with a connecting component 2 for easy connection between the conductive film body 11 and the keyboard base 1. The connecting component 2 includes an upper frame 21, a lower frame 22, a lower connecting unit 23, and an upper connecting unit 24. Both the upper frame 21 and the lower frame 22 are rectangular frame structures, distributed around the edge of the conductive film body 11. The bottom surface of the upper frame 21 is attached to the upper surface of the conductive film body 11, and the upper surface of the lower frame 22 is attached to the bottom surface of the conductive film body 11. The operator only needs to use the lower connecting unit 23 to connect the lower frame 22 to the keyboard base 1, then place the conductive film body 11 on top of the lower frame 22, making sure the lower frame 22 fits as close as possible to the side of the conductive film body 11. After that, the operator needs to cover the upper frame 21 and use the upper connecting unit 24 to fix the lower frame 22 to the upper frame 21. This eliminates the cumbersome drilling action in traditional technology and ensures the installation efficiency of the conductive film structure.

[0039] Four sets of lower connecting units 23 are located on the four sides of the lower frame 22. The lower connecting units 23 connect the lower frame 22 to the keyboard base 1. Each lower connecting unit 23 includes connecting posts 231 and connecting sleeves 232. The connecting posts 231 are fixed to the top of the keyboard base 1. The cross-section of the connecting posts 231 is semi-circular, and the center of the connecting posts 231 is higher than the center of the keyboard base 1. The connecting sleeves 232 are fixed to the bottom of the lower frame 22 and engage with the connecting posts 231. The cross-section of the connecting sleeves 232 is semi-circular, the distance between the two bottom sides of the connecting sleeves 232 is less than the diameter of the connecting posts 231, and the bottom of the connecting sleeves 232 is lower than the center of the connecting posts 231. The operator only needs to align the four connecting sleeves 232 with the four connecting posts 231 and press the lower frame 22 from top to bottom to engage the connecting sleeves 232 with the connecting posts 231, thus completing the operation of fixing the lower frame 22 to the keyboard base 1.

[0040] The number of upper connecting units 24 is equal to the number of lower connecting units 23, and their positions correspond one-to-one. They are used to fix the lower frame 22 and the upper frame 21. The upper connecting unit 24 includes a mounting strip 241 and a buckle 242. The mounting strip 241 is fixed to the side of the lower frame 22, and the buckle 242 is fixed to the top of the mounting strip 241. The cross-section of the buckle 242 is an isosceles trapezoid, and the inclined surface at the bottom of the buckle 242 engages with the edge of the upper frame 21. When installing the upper frame 21, the operator only needs to align the side of the upper frame 21 with the side of the lower frame 22 and press the upper frame 21 from top to bottom. This will cause the buckle 242 to deform towards the side away from the center of the upper frame 21. Subsequently, the inclined surface at the bottom of the buckle 242 engages with the edge of the upper frame 21, thereby completing the operation of fixing the conductive film body 11 between the lower frame 22 and the upper frame 21.

[0041] An annular protrusion 3 is fixedly provided at the bottom of the upper frame 21, and an annular groove 221 is provided at the top of the lower frame 22. The annular protrusion 3 and the annular groove 221 cooperate with each other and abut against the conductive film body 11. The interaction between the annular protrusion 3 and the annular groove 221 enhances the cooperation between the upper frame 21 and the lower frame 22 and the clamping degree of the conductive film body 11, which is beneficial to improving the stability of the conductive film body 11 in use.

[0042] An integrated circuit board 4 is disposed between the bottom of the conductive film body 11 and the top of the multiple support grids 8. The integrated circuit board 4 plays a role in signal transmission and conversion in the keyboard, and is a bridge for signal transmission between the keyboard and the computer. The operating principle of the integrated circuit board 4 is conventional technology, and is only briefly introduced here. The multiple support grids 8 provide a certain degree of support for the integrated circuit board 4. In this embodiment, a rectangular block 12 is fixed at each of the four corners of the top of the keyboard base 1, and the top of the rectangular block 12 abuts against the bottom of the lower frame 22. When the keyboard is in use, the multiple support grids 8 cooperate to support the integrated circuit board 4, reducing the probability of displacement of the conductive film body 11 due to prolonged key pressing.

[0043] A silicone button 5 and a dustproof plate 6 are provided on the conductive film body 11. The surface of the dustproof plate 6 is provided with a through hole 61. The silicone button 5 passes through the through hole 61, and the outer wall of the silicone button 5 abuts against the inner wall of the through hole 61.

[0044] The sidewall of the dustproof plate 6 abuts against the inner sidewall of the upper frame 21. During keyboard use, dust and water can easily enter the interior of the conductive film body 11. The dustproof plate 6 located at the top can block most of the dust. Since the silicone key 5 and the dustproof plate 6 are pressed against each other, it also has a certain blocking effect on external water, reducing the failure rate of the conductive film body 11.

[0045] A ring-shaped indicator strip 7 is fixedly installed at the top of the lower frame 22 to indicate the installation position of the conductive film body 11, providing a quick indication of the conductive film body 11. When the worker is installing the conductive film body 11, they can quickly determine the installation position of the conductive film body 11 according to the indication of the ring-shaped indicator strip 7, thus improving the installation efficiency of the conductive film body 11.

[0046] Example 2

[0047] like Figure 7 and Figure 8As shown, the difference between this embodiment and Embodiment 1 lies only in the structure of the upper connecting unit 24. Specifically, the upper connecting unit 24 includes a connecting strip 243 and an elastic clip 244. The connecting strip 243 is fixed to the bottom of the upper frame 21, and the elastic clip 244 is fixed to the bottom of the connecting strip 243. The cross-section of the elastic clip 244 is an inverted "Ω" shape. A snap-fit ​​groove 222 is provided at the top of the lower frame 22. The elastic clip 244 snaps into the snap-fit ​​groove 222, and a flared chamfer 223 is provided at the intersection of the inner walls of the groove. When installing the upper frame 21, the operator only needs to align the position of the elastic clip 244 with the snap-fit ​​groove 222 and press the upper frame 21 from top to bottom to snap the elastic clip 244 into the snap-fit ​​groove 222, thereby easily completing the operation of connecting the upper frame 21 and the lower frame 22 to clamp the conductive film body 11. When staff need to disassemble the upper frame 21, they only need to pull it outwards from bottom to top to ensure quick disassembly and installation of the upper frame 21.

[0048] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A novel waterproof and dustproof conductive film structure for a keyboard, comprising a conductive film body (11) for use with a keyboard base (1), characterized in that: The conductive film body (11) is provided with a connecting component (2) to facilitate the connection between the conductive film body (11) and the keyboard base (1). The connecting component (2) includes an upper frame (21) disposed on the top of the conductive film body (11) and distributed around the edge of the conductive film body (11), a lower frame (22) disposed on the bottom of the conductive film body (11) and distributed around the edge of the conductive film body (11), an upper connecting unit (24) for fixing the lower frame (22) and the upper frame (21), and a lower connecting unit (23) for connecting the lower frame (22) and the keyboard base (1).

2. The novel waterproof and dustproof conductive film structure for a keyboard according to claim 1, characterized in that: The four groups of the lower connecting units (23) are located on the four sides of the lower frame (22). The number of groups of the upper connecting units (24) is equal to the number of groups of the lower connecting units (23) and their positions correspond one-to-one. The lower connecting unit (23) includes a connecting post (231) fixed to the top of the keyboard base (1) and a connecting sleeve (232) fixed to the bottom of the lower frame (22) and engaged with the connecting post (231). The cross-section of the connecting post (231) is semi-circular. The center of the connecting post (231) is higher than the keyboard base (1). The distance between the two sides of the bottom of the connecting sleeve (232) is less than the diameter of the connecting post (231). The bottom of the connecting sleeve (232) is lower than the center of the connecting post (231).

3. The novel waterproof and dustproof conductive film structure for a keyboard according to claim 2, characterized in that: The upper connecting unit (24) includes an mounting strip (241) fixed to the side of the lower frame (22) and a buckle (242) fixed to the top of the mounting strip (241). The buckle (242) has an isosceles trapezoidal cross section, and the inclined surface at the bottom of the buckle (242) is fastened to the edge of the upper frame (21).

4. The novel waterproof and dustproof keyboard conductive film structure according to claim 2, characterized in that: The upper connecting unit (24) includes a connecting strip (243) fixed to the bottom of the upper frame (21) and an elastic clip (244) fixed to the bottom of the connecting strip (243). The cross-section of the elastic clip (244) is an inverted "Ω" shape. The top of the lower frame (22) is provided with a snap-fit ​​groove (222) that engages with the elastic clip (244). A flared chamfer (223) is provided at the intersection between the top of the lower frame (22) and the inner wall of the snap-fit ​​groove (222).

5. A novel waterproof and dustproof conductive film structure for a keyboard according to claim 3 or 4, characterized in that: The bottom of the upper frame (21) is fixedly provided with an annular protrusion (3), and the top of the lower frame (22) is provided with an annular groove (221) that cooperates with the annular protrusion (3). The annular protrusion (3) and the annular groove (221) cooperate with each other and abut against the conductive film body (11).

6. The novel waterproof and dustproof conductive film structure for a keyboard according to claim 5, characterized in that: A rectangular block (12) is fixed at the four corners of the top of the keyboard base (1), and the top of the rectangular block (12) abuts against the bottom of the lower frame (22).

7. The novel waterproof and dustproof conductive film structure for a keyboard according to claim 5, characterized in that: The bottom frame (22) is fixedly provided with an annular indicator strip (7) for indicating the installation position of the conductive film body (11).

8. The novel waterproof and dustproof keyboard conductive film structure according to claim 7, characterized in that: The conductive film body (11) is provided with a silicone button (5) and a dustproof plate (6) on its top. The dustproof plate (6) is provided with a through hole (61) that abuts against the outer wall of the silicone button (5). The side wall of the dustproof plate (6) abuts against the inner side wall of the upper frame (21).

9. The novel waterproof and dustproof keyboard conductive film structure according to claim 7, characterized in that: The keyboard base (1) has multiple support grids (8) fixedly installed on its top. An integrated circuit board (4) is provided between the bottom of the conductive film body (11) and the top of the multiple support grids (8). The multiple support grids (8) are misaligned with the keys on the keyboard base (1).

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