Membrane key
By designing the removable box cover and box body structure, the problem of difficulty in repairing existing film button switches is solved, and a more convenient maintenance and replacement process is achieved, reducing the difficulty of repairs.
Patent Information
- Application Number
- CN202421075417.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-05-17
AI Technical Summary
When the existing film button switches are damaged, they are more cumbersome and difficult to disassemble, which leads to difficulties in repair and replacement and increases the difficulty of repair.
A film button is designed. The box cover can be detached through the setting of the box body and the box cover. The box cover is convenient for disassembly through the coordination of the card block and the limiting slot, and thus facilitates the repair or replacement of the internal components.
Through the design of the box body and the cover, the maintenance difficulty of the film button switch is reduced, so that components can be easily disassembled and replaced when damaged.
Smart Images
Figure CN222546186U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of membrane switches, and particularly relates to a membrane key. Background Art
[0002] The membrane switch is an operating system that integrates key functions, indicating elements, and instrument panels. It consists of four parts: panel, upper circuit, isolation layer, and lower circuit. When the membrane switch is pressed, the contacts of the upper circuit deform downward and contact and conduct with the plates of the lower circuit. When the finger is released, the contacts of the upper circuit bounce back, the circuit is disconnected, and the loop triggers a signal. It is widely used in electronic communications, electronic measuring instruments, industrial control, medical equipment, automotive industry, smart toys, household appliances and other fields.
[0003] Most of the existing membrane key switches are fixed on the circuit board by bonding a panel and a bottom glue. The installation is cumbersome and difficult to disassemble. When the membrane key switch is damaged, it is not convenient to disassemble the membrane switch key, thereby making it inconvenient to inspect and replace the key switch components, which increases the difficulty of repairing the membrane key switch. Utility Model Content
[0004] The purpose of the utility model is to provide a membrane key switch. Through the arrangement of a box body and a box cover, when the membrane key switch is damaged, the box body and the box cover can be easily disassembled to repair or replace the components of the membrane key switch inside the box body, thereby reducing the difficulty of repairing the membrane key switch to solve the problems raised in the above-mentioned background technology.
[0005] To achieve the above object, the utility model provides the following technical solution: a membrane key, comprising a box body, a mounting groove is provided on the top of the box body, a circuit board is installed in the mounting groove, a box cover is detachably installed on the top of the box body, the box cover is located above the circuit board, and the bottom of the box cover is attached to the top of the circuit board;
[0006] A plurality of groups of limiting grooves are provided on the side walls on both sides of the box cover, and the plurality of groups of limiting grooves are equidistantly arranged, and positioning rods are installed on the inner walls of the plurality of groups of limiting grooves, and a clamping block is installed at one end of the plurality of groups of positioning rods, and the clamping block is slidably connected in the limiting groove, and a movable groove is provided at one end of the clamping block close to the positioning rod, a spring is installed on the inner wall of the movable groove, and a movable plate is installed at one end of the spring, and the movable plate is slidably connected in the movable groove, and a side of the movable plate away from the spring is installed on the positioning rod, and an end of the clamping block away from the positioning rod is set as an inclined surface.
[0007] Furthermore, a plurality of groups of buttons are installed on the box cover, and the plurality of groups of buttons are slidably connected to the box cover, and the bottoms of the plurality of groups of buttons are attached to the circuit board.
[0008] Furthermore, multiple groups of card slots are provided on the outer walls on both sides of the box body, and the multiple groups of card slots are located in the installation slots and are connected, and the card slots and card blocks are used in combination.
[0009] Furthermore, one end of the box body is provided with a plurality of through slots, the plurality of through slots are all located below the card slots, and the plurality of through slots are all connected to the mounting slots.
[0010] Furthermore, two groups of mounting blocks and multiple groups of support columns are installed at the bottom of the mounting groove, the multiple groups of support columns are located between the two groups of mounting blocks, and the multiple groups of support columns are arranged in rows at equal distances.
[0011] Furthermore, the circuit board is installed in the installation groove, and the circuit board is located above the two groups of installation blocks and the support columns.
[0012] Furthermore, multiple groups of trigger springs are installed on the top of the circuit board, and the multiple groups of trigger springs are provided with a first contact point, a second contact point and a third contact point. Multiple groups of metal sheets are provided on the circuit board, and the multiple groups of metal sheets are electrically connected to the circuit board. The multiple groups of metal sheets are provided with a first contact sheet, a second contact sheet and a third contact sheet, and the first contact sheet, the second contact sheet and the third contact sheet are used in conjunction with the first contact point, the second contact point and the third contact point, respectively.
[0013] Furthermore, a plurality of groups of binding posts are installed at the bottom of the circuit board, connecting wires are installed on the plurality of groups of binding posts, and the plurality of groups of binding posts are electrically connected to the circuit board.
[0014] The beneficial effects of the utility model are:
[0015] The utility model is provided with a box body and a box cover. When the membrane key switch is damaged, the card block is pressed to move the card block into the limit groove, so that the limit of the card block on the box cover is released, and the box body and the box cover are separated, so that the box cover can be disassembled, and the components of the membrane key switch in the box body can be repaired or replaced, thereby reducing the difficulty of repairing the membrane key switch.
[0016] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A schematic diagram of the structure according to an embodiment of the utility model is shown;
[0019] Figure 2 A schematic diagram of the internal structure of a box body according to an embodiment of the utility model is shown;
[0020] Figure 3 A schematic diagram of the top structure of a circuit board according to an embodiment of the utility model is shown;
[0021] Figure 4 A schematic diagram of the bottom structure of a circuit board according to an embodiment of the utility model is shown;
[0022] Figure 5 A schematic diagram of the top structure of a box cover according to an embodiment of the utility model is shown;
[0023] Figure 6 A schematic diagram of the structure of a box cover according to an embodiment of the utility model is shown;
[0024] Figure 7 A schematic diagram of the circuit board contact piece connection structure according to an embodiment of the utility model is shown.
[0025] In the figure: 110, box body; 120, mounting groove; 130, mounting block; 140, supporting column; 150, through groove; 160, card slot; 210, box cover; 220, button; 231, limit groove; 232, positioning rod; 233, card block; 234, moving groove; 235, spring; 236, moving plate; 310, circuit board; 320, trigger spring; 321, first contact point; 322, second contact point; 323, third contact point; 330, terminal; 340, connecting line; 410, first contact piece; 420, second contact piece; 430, third contact piece. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] See also Figure 1-6 The utility model provides a technical solution: a membrane keypad. It includes a box body 110, a mounting groove 120 is provided on the top of the box body 110, a circuit board 310 is installed in the mounting groove 120, a box cover 210 is detachably installed on the top of the box body 110, the box cover 210 is located above the circuit board 310, and the bottom of the box cover 210 is attached to the top of the circuit board 310;
[0028] A plurality of groups of limiting grooves 231 are provided on the side walls of both sides of the box cover 210, and the plurality of groups of limiting grooves 231 are equidistantly arranged, and positioning rods 232 are installed on the inner walls of the plurality of groups of limiting grooves 231, and a clamping block 233 is installed at one end of the plurality of groups of positioning rods 232, and the clamping block 233 is slidably connected in the limiting grooves 231, and a moving groove 234 is provided at one end of the clamping block 233 close to the positioning rod 232, and a spring 235 is installed on the inner wall of the moving groove 234, and a moving plate 236 is installed at one end of the spring 235, and the moving plate 236 is slidably connected in the moving groove 234, and the side of the moving plate 236 away from the spring 235 is installed on the positioning rod 232, and the end of the clamping block 233 away from the positioning rod 232 is set as an inclined surface.
[0029] When the membrane key switch is damaged, the block 233 is pressed to move the block 233 into the limiting groove 231, thereby releasing the limiting effect of the block 233 on the box cover 210, separating the box body 110 and the box cover 210, thereby disassembling the box cover 210 and repairing or replacing the components of the membrane key switch inside the box body 110, thereby reducing the difficulty of repairing the membrane key switch.
[0030] The box cover 210 is provided with a plurality of sets of buttons 220 , which are all slidably connected to the box cover 210 , and the bottoms of the plurality of sets of buttons 220 are all attached to the circuit board 310 .
[0031] Multiple groups of card slots 160 are provided on the outer walls of both sides of the box body 110 . The multiple groups of card slots 160 are located in the installation slots 120 and are connected. The card slots 160 and the card blocks 233 are used in conjunction with each other.
[0032] When the box cover 210 is installed, the contact between the inclined surface of the block 233 and the boundary of the box body 110 ensures that the box cover 210 will not be hindered by the block 233 during movement. When the block 233 enters the slot 160, the block 233 is inserted into the slot 160 under the elastic action of the spring 235, thereby limiting the box cover 210 and installing the box cover 210 on the box body 110.
[0033] One end of the box body 110 is provided with a plurality of through slots 150 . The plurality of through slots 150 are all located below the card slots 160 . The plurality of through slots 150 are all connected to the mounting slots 120 .
[0034] Two groups of mounting blocks 130 and multiple groups of support columns 140 are installed at the bottom of the mounting groove 120. The multiple groups of support columns 140 are located between the two groups of mounting blocks 130, and the multiple groups of support columns 140 are arranged in rows at equal distances.
[0035] The mounting block 130 and the support column 140 are provided to support the circuit board 310, so that when the circuit board 310 is in use, when the circuit board 310 is subjected to excessive pressure, the circuit board 310 is not easily deformed, thereby maintaining the stability of the shape of the circuit board 310 and making the circuit board 310 not easily damaged. At the same time, it can be ensured that there is enough space for the connection of components at the bottom of the circuit board 310, so that the connection parts between the circuit board 310 and the components are not easily squeezed, thereby ensuring the use of the circuit board 310.
[0036] The circuit board 310 is installed in the installation groove 120 , and the circuit board 310 is located above the two groups of installation blocks 130 and the support pillars 140 .
[0037] A plurality of groups of trigger springs 320 are installed on the top of the circuit board 310, and a first contact point 321, a second contact point 322 and a third contact point 323 are arranged on the plurality of groups of trigger springs 320. A plurality of groups of metal sheets are arranged on the circuit board 310, and the plurality of groups of metal sheets are electrically connected to the circuit board 310. A first contact sheet 410, a second contact sheet 420 and a third contact sheet 420 are arranged on the plurality of groups of metal sheets, and the first contact sheet 410, the second contact sheet 420 and the third contact sheet 430 are used in conjunction with the first contact point 321, the second contact point 322 and the third contact point 323 respectively.
[0038] The third contact point 323 of the four pins of the trigger spring 320 is different from the second contact point 322. The length of the third contact point 323 is slightly shorter, forming a height difference with the height of the second contact point 322. It allows two independent contacts to be achieved with a single press, and two functions can be achieved through software debugging. When the trigger spring 320 is pressed lightly, an electrical performance feedback can be achieved, and this press is provided by the second contact point 322; when a heavy force is pressed, the second contact point is completed, and this press is connected to the first contact point 321 through the third contact point 323 to achieve the second function, allowing the product to complete two electrical performance feedbacks. The PCB wiring scheme is as follows: the first contact point 321, the second contact point 322 and the third contact point 323 are wired separately; the product is assembled with its counterpart through the process of welding wires.
[0039] A plurality of groups of binding posts 330 are installed at the bottom of the circuit board 310 . Connection wires 340 are installed on the plurality of groups of binding posts 330 . The plurality of groups of binding posts 330 are electrically connected to the circuit board 310 .
[0040] The connecting wire 340 enters the box body 110 through the through slot 150, so as to be easily connected to the circuit board 310, so that the membrane key switch can be connected to external electrical components, thereby ensuring the use of the membrane key switch.
[0041] Specifically, the internal electrical connection structure of the circuit board 310, the terminal 330, the trigger spring 320 and the metal sheet is well known to those skilled in the art and will not be described in detail here. The electrical components in this application are all connected to an external power source when in use.
[0042] The circuits, electrical components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by this utility model does not involve improvements to the software.
[0043] The control method of the present application document is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field, which is common knowledge in this field. In addition, the present application document is mainly used to protect mechanical devices, so the present application document will no longer explain the control method and circuit connection in detail.
[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A membrane key, characterized in that: The box body (110) comprises a box body (110), a mounting groove (120) is formed on the top of the box body (110), a circuit board (310) is mounted in the mounting groove (120), a box cover (210) is detachably mounted on the top of the box body (110), the box cover (210) is located above the circuit board (310), and the bottom of the box cover (210) is attached to the top of the circuit board (310); A plurality of groups of limiting grooves (231) are provided on the side walls of both sides of the box cover (210). The plurality of groups of limiting grooves (231) are arranged at equal intervals. Positioning rods (232) are installed on the inner walls of the plurality of groups of limiting grooves (231). One end of the plurality of groups of positioning rods (232) is installed with a clamping block (233). The clamping block (233) is slidably connected in the limiting grooves (231). An end of the clamping block (233) close to the positioning rod (232) is provided with a moving groove (234). A spring (235) is installed on the inner wall of the moving groove (234). A moving plate (236) is installed at one end of the spring (235). The moving plate (236) is slidably connected in the moving groove (234). A side of the moving plate (236) away from the spring (235) is installed on the positioning rod (232). An end of the clamping block (233) away from the positioning rod (232) is arranged as an inclined surface.
2. A membrane key according to claim 1, characterized in that: A plurality of groups of buttons (220) are installed on the box cover (210), the plurality of groups of buttons (220) are all slidably connected to the box cover (210), and the bottoms of the plurality of groups of buttons (220) are all attached to the circuit board (310).
3. A membrane key according to claim 2, characterized in that: Multiple groups of card slots (160) are provided on both side outer walls of the box body (110); the multiple groups of card slots (160) are located in the mounting slot (120) and are connected; the card slots (160) and the card blocks (233) are used in conjunction with each other.
4. A membrane key according to claim 3, characterized in that: One end of the box body (110) is provided with a plurality of through slots (150), the plurality of through slots (150) are all located below the card slot (160), and the plurality of through slots (150) are all connected to the installation slot (120).
5. A membrane key according to claim 4, characterized in that: Two groups of mounting blocks (130) and multiple groups of support columns (140) are installed at the bottom of the mounting groove (120); the multiple groups of support columns (140) are located between the two groups of mounting blocks (130), and the multiple groups of support columns (140) are arranged in a row at equal distances.
6. A membrane key according to claim 5, characterized in that: The circuit board (310) is installed in the installation groove (120), and the circuit board (310) is located above the two groups of installation blocks (130) and the support column (140).
7. A membrane key according to claim 6, characterized in that: A plurality of groups of trigger springs (320) are installed on the top of the circuit board (310), and a first contact point (321), a second contact point (322), and a third contact point (323) are arranged on the plurality of groups of trigger springs (320); a plurality of groups of metal sheets are arranged on the circuit board (310), and the plurality of groups of metal sheets are electrically connected to the circuit board (310); a first contact sheet (410), a second contact sheet (420), and a third contact sheet (430) are arranged on the plurality of groups of metal sheets, and the first contact sheet (410), the second contact sheet (420), and the third contact sheet (430) are used in conjunction with the first contact point (321), the second contact point (322), and the third contact point (323), respectively.
8. A membrane key according to claim 7, characterized in that: A plurality of groups of binding posts (330) are installed at the bottom of the circuit board (310), connecting wires (340) are installed on the plurality of groups of binding posts (330), and the plurality of groups of binding posts (330) are electrically connected to the circuit board (310).