Circuit board provided with jumper wire through metal film switch
By setting up a metal film switch on the PCB, the jumper function is achieved using the preset position and fixed pins at its edges, which solves the problem of jumper occupying space and increasing costs in traditional PCB designs, and simplifies layout, reduces costs and improves Reliability effect.
Patent Information
- Application Number
- CN202411514476.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-02-18
AI Technical Summary
In traditional PCB design, jumpers are usually achieved by reserveing contact points on the PCB or installing jumper pins, which leads to space occupancy and increases process complexity and production costs.
By setting the metal film switch on the circuit board, the jumper function is achieved using the preset position at its edge and the fixed pins, and the jumper or bridge setting is achieved through the fixed pins and/or the center contacts.
This solution effectively simplifies the layout of circuit boards, reduces production costs, improves the stability and reliability of circuits, is suitable for miniaturized and lightweight electronic devices, and provides new ideas for multi-function integrated design.
Smart Images
Figure CN119485912A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of circuit board (PCB) design, and in particular to a circuit board with jumpers set through metal film switches. Background Art
[0002] In today's electronic product design, with the development trend of miniaturization and thinness, the requirements for the integration and functionality of electronic components are getting higher and higher. In this context, circuit board design faces more and more challenges, especially in achieving multi-functional integration and signal transmission. How to simplify the circuit layout and improve the reliability of the circuit has become a key research direction for designers. Among them, the jumper function is one of the key issues. In traditional designs, jumpers are usually implemented by welding or additional wires, but these methods often take up space, increase process complexity and production costs.
[0003] Existing jumper solutions are usually implemented by reserving contact points on the PCB or installing jumper pins, but both solutions have their own limitations. Contact point jumpers require additional contact steps, which not only increases production costs, but may also cause poor jumper contact or electrical performance degradation due to contact quality issues; while jumper pins require additional physical components, occupying valuable circuit board space and requiring manual adjustment, which is not suitable for automated production and large-scale integrated circuit design.
[0004] Therefore, a new circuit board technical solution for setting jumpers is currently needed to solve the problem that jumpers in traditional PCB design are usually implemented by reserving contact points or installing jumper pins on the PCB, which takes up space and increases process complexity and production costs. Summary of the invention
[0005] The present application provides a circuit board with jumpers set by metal film switches, which solves the problem that in traditional PCB design, jumpers are usually implemented by reserving contact points on the PCB or installing jumper pins, which takes up space and increases process complexity and production costs.
[0006] In order to solve the above problems, the present application provides a circuit board for setting jumpers through a metal film switch, the circuit board comprising one or more metal film switches, a plurality of pin positions are set at a preset position on the edge of a metal film switch on the circuit board, and correspondingly, a plurality of fixed pins are set at the bottom edge of the metal film switch, the metal film switch is engaged with the corresponding pin positions through the plurality of fixed pins and attached to the circuit board; the metal film switch is also provided with a center contact, and the fixed pin is higher than other edge parts of the metal film switch, so that the wiring of the circuit board passes through under the metal film switch, and the setting of the jumper or bridge is realized through the fixed pins and / or the center contact.
[0007] Furthermore, the above-mentioned circuit board may also include: the plurality of fixed pins corresponding to the bottom edge of the metal film switch specifically refers to: a plurality of evenly distributed fixed pins are corresponding to the bottom edge of the metal film switch, the central contact of the metal film switch is at the center position of the metal film switch, the plurality of fixed pins of the metal film switch are connected to the row scanning wiring, and when the metal film switch is pressed, the central contact is connected to the column scanning or row scanning wiring.
[0008] Furthermore, the circuit board may further include: a plurality of fixed pins of the metal film switch are connected to the column scanning wiring, and when the metal film switch is pressed, the central contact of the metal film switch is connected to the row scanning wiring.
[0009] Furthermore, the above-mentioned circuit board may also include: a plurality of pin positions are set at a preset position on the edge of a metal film switch on the circuit board, specifically: a metal film switch pin package is set on the circuit board, and the metal film switch pin package is provided with a plurality of pin pads corresponding to the fixed pins of the metal film switch, which are used to connect the corresponding multiple fixed pins of the metal film switch, and the multiple fixed pins of the metal film switch are connected to the column scanning line or the row scanning line through the corresponding pin pads.
[0010] Furthermore, the circuit board may further include: the metal film switch pin package is further provided with a contact pad, and the position of the contact pad is provided corresponding to the position of the central contact of the metal film switch.
[0011] Furthermore, the above-mentioned circuit board may also include that the shape of the metal film switch includes circle, ellipse or polygon.
[0012] Through the above scheme, the application of this application, realizing the jumper function through the metal film switch design is a circuit design scheme with great practical value. The scheme of this application can effectively solve some pain points in circuit board design, simplify circuit board layout, reduce production costs, and improve the stability and reliability of the circuit, which is conducive to large-scale production and manufacturing. The scheme of this application is not only suitable for miniaturized and lightweight electronic devices, but also provides new ideas and technical paths for the multifunctional integrated design of future electronic products, making this application have broad application prospects and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] 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:
[0014] Figure 1The figure shows a schematic diagram of the structure decomposition of a circuit board in which a jumper is set through a metal film switch of the present application;
[0015] Figure 2 Shown is a schematic diagram of the structural decomposition of an embodiment of a metal membrane switch of the present application;
[0016] Figure 3 The figure shows a schematic diagram of the structure decomposition of an embodiment of the present application in which a circuit board is distributed with a plurality of metal film switch packages arranged in a matrix. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.
[0018] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.
[0019] The main design idea of this application is to realize the function of jumper in the circuit board by improving the design structure of the metal membrane switch. Metal membrane switches are widely used in consumer electronics, industrial control equipment and other fields due to their simple structure, low cost, superior feel and strong durability. By redesigning and optimizing the layout of the metal membrane switch so that it has the ability to realize the jumper function, the number of components on the circuit board can be significantly reduced, the PCB design can be simplified, and the reliability and stability of the product can be improved.
[0020] The metal film switch is a mechanical switch based on a dome structure, usually consisting of a metal dome covering a conductive circuit. When the user presses the dome, the dome contacts the conductive circuit below to form a path to achieve signal transmission. This structure has the characteristics of low cost, high durability and reusability, and is very suitable for some equipment that requires frequent operation or long-term use. The existing metal film switch is mainly used to realize the switch function. If it can adjust the structural design of the key to enable it to realize the jumper function under specific conditions, it is an innovative solution. In this design, the metal film switch can not only realize signal transmission when pressed, but also form a permanent or temporary jumper connection between specific circuits in the design of the circuit board through the special structure of the key, thereby achieving the purpose of changing the working path of the circuit. The solution of the metal film switch to realize the jumper function has multiple advantages. First, it does not require additional contact points or jumper pins and other components, and can make full use of the structural characteristics of the key itself, reduce the number of components on the circuit board, and reduce production complexity and material costs. Secondly, this solution can flexibly realize the connection between different circuits by adjusting the design parameters of the key (such as the shape, position and material of the key), and adapt to more diverse circuit design requirements. In addition, through this key jumper function, different working modes or function configurations can be set when the product leaves the factory, which is convenient for users to switch during use. In addition, the metal film switch also has good anti-interference ability. Due to its relatively simple mechanical structure, it can effectively reduce the impact of electromagnetic interference on signal transmission and ensure the stability and reliability of the jumper function. Moreover, the key itself usually has a high mechanical life and can withstand a large number of operations, so it can maintain good performance even in long-term use. In terms of application scenarios, this jumper function based on metal film switches is particularly suitable for some space-constrained devices that require high integration, such as wearable devices, smart phones, industrial controllers, etc. In these devices, the space of the circuit board is often very limited, and the jumper function realized by the metal film switch can not only save valuable circuit board space, but also improve the flexibility of circuit design, and meet the user's needs for multi-function and personalized configuration.
[0021] The circuit board of the present application, which sets the jumper through the metal film switch, realizes the jumper function through the metal film switch design, which is a circuit design scheme with great practical value. The scheme of the present application can effectively solve some pain points in circuit board design, simplify circuit board layout, reduce production costs, and improve circuit stability and reliability. The scheme of the present application is not only suitable for miniaturized and lightweight electronic devices, but also provides new ideas and technical paths for the multifunctional integrated design of future electronic products.
[0022] like Figure 1As shown, the present application is a circuit board for setting jumpers through metal film switches, wherein the circuit board 200 includes one or more metal film switches 100, and a plurality of pin positions 20011 are set at a preset position on the edge of a metal film switch on the circuit board. Correspondingly, a plurality of fixing pins 1001 are correspondingly set at the bottom edge of the metal film switch 100, and the metal film switch 100 is attached to the circuit board 200 by engaging with the pin positions 20011 corresponding to 1001 through the plurality of fixing pins; the metal film switch 100 is also provided with a central contact 1002, and the fixing pin 1001 is higher than other edge portions of the metal film switch 100, so that the routing of the circuit board (the routing includes: row scanning routing 2002 and column scanning routing 2003) passes through the bottom of the metal film switch without generating structural interference, and the setting of jumpers or bridges is realized by the fixing pins 1001 and / or the central contact 1002.
[0023] The circuit board described in the present application is configured as a single-layer circuit board with a reinforcement sheet. Compared with the traditional circuit board with at least two layers of wiring, the configuration of the single-layer circuit board reduces the number of layers of the circuit board, thereby reducing the material cost, processing cost and testing cost. In addition, due to the simplified structure, the scrap rate and maintenance rate in the production process will also decrease accordingly, further saving production costs; at the same time, the single-layer wiring design makes the production process more efficient and standardized, improving the production capacity and product quality of the production line.
[0024] When the present application implements a complex key matrix layout on a single-layer circuit board, it is inevitable that the lines will cross. However, the design of the metal film switch 100 in this embodiment cleverly solves this problem. The design of the four fixed pins 1001 raising the metal film switch body allows the row scan line (or column scan line) to pass directly through the bottom of the metal film switch to avoid physical interference, thereby realizing the jumper or bridge function. In this way, even in the case of crossed lines, the accurate transmission of the scan signal and the expected effect of the key function can be achieved.
[0025] The substrate of the circuit board includes but is not limited to a glass fiber board or a flexible circuit board (FPC) with a reinforcement sheet. FPC can adapt to the design requirements of various complex shapes and compact spaces due to its good flexibility and bendability, and is a preferred embodiment in this application; the reinforcement sheet can be a metal reinforcement sheet, wherein the material of the reinforcement sheet can be stainless steel. The stainless steel reinforcement sheet provides the necessary strength and hardness, ensuring the stability and durability of the key under long-term use. Since stainless steel has a high thermal conductivity, it can better discharge heat from the circuit board, thereby improving the heat dissipation performance of the circuit board. At the same time, the circuit board with stainless steel as the circuit support layer also has high temperature resistance and corrosion resistance, which can effectively prevent the circuit board from chemical corrosion, further increasing the life of the circuit board, and is a preferred embodiment in this application. The combined design of FPC with stainless steel reinforcement sheet not only ensures the lightness and thinness of the key, but also ensures its structural strength. In addition, the stainless steel material process is mature and suitable for automated production and large-scale integrated circuit design.
[0026] The thickness of the stainless steel reinforcement sheet is set to be less than or equal to 50 μm. The thickness of the stainless steel reinforcement sheet can be set to be less than or equal to 50 μm; the setting of the thickness of the stainless steel reinforcement sheet less than or equal to 50 μm can not only ensure the necessary strength and hardness of the circuit board, but also reduce the thickness of the circuit board, meeting the trend of thinning and lightweight PCB design requirements.
[0027] The circuit board is manufactured on its surface using circuit board manufacturing processes including but not limited to metal etching, thick film printing or laser printing to produce circuits that meet the design. The process is mature and the single-layer routing design makes the production process more efficient and standardized, thereby improving the production line's capacity and product quality.
[0028] The shape of the metal film switch may include various shapes such as round, oval or polygonal. As long as the shape is suitable for setting the metal film switch on the circuit board, it can be used in this application. This application is not limited to this. The various shapes of the metal film switch can enrich the design requirements of electronic products and better meet the needs of users.
[0029] The said setting of multiple fixed pins corresponding to the bottom edge of the metal film switch specifically means: multiple evenly distributed fixed pins are set corresponding to the bottom edge of the metal film switch, the central contact of the metal film switch is at the center of the metal film switch, the multiple fixed pins of the metal film switch are connected to the row scanning line, and when the metal film switch is pressed, the central contact is connected to the column scanning line. The setting of multiple evenly distributed fixed pins corresponding to the bottom edge of the metal film switch can better balance stress and stability, extend product life, and improve user satisfaction; or, the multiple fixed pins of the metal film switch are connected to the column scanning line, and when the metal film switch is pressed, the central contact of the metal film switch is connected to the row scanning line. The above setting realizes the setting of jumper or bridge of the circuit board through the fixed pins and / or the central contact.
[0030] The provision of multiple pin positions at a preset position on the edge of a metal film switch on the circuit board specifically refers to: a metal film switch pin package is provided on the circuit board, and the metal film switch pin package is provided with multiple pin pads corresponding to the fixed pins of the metal film switch, which are used to connect the corresponding multiple fixed pins of the metal film switch, and the multiple fixed pins of the metal film switch are connected to the column scanning line or the row scanning line through the corresponding pin pads. The pin pad ensures the precise positioning and stable installation of the metal film switch, and prevents the deviation or looseness during the metal film switch key pressing process; the metal film switch pin package can better ensure that the fixed pin is connected to the line, ensure the standardization of the entire production process, and better improve product quality and large-scale production capacity.
[0031] Further comprising: the metal film switch pin package is also provided with a contact pad, and the position of the contact pad is provided corresponding to the position of the central contact of the metal film switch. The metal film switch pin package can better ensure that the fixed pin is connected to the wiring, ensure the standardization of the entire production process, and better improve product quality and mass production capacity.
[0032] like Figure 2 As shown, an embodiment of the metal membrane switch of the present application, wherein the metal membrane switch 100 has four fixed pins 1001 and a central contact 1002, as shown in FIG. Figure 2 As shown. The four fixing pins 1001 of the metal film switch 100 protrude from other edge parts. This design is not only easy to install and position, but also convenient for wiring on the circuit board. Figure 1As shown, the four fixed pins 1001 of the metal film switch 100 are used to connect with the column scanning wiring 2003 (or row scanning wiring) to realize the column (or row) scanning function in the key matrix, and the central contact 1002 of the metal film switch 100 is directly connected with the row scanning wiring 2002 (or column scanning wiring). When the key is pressed, the central contact 1002 will contact the corresponding contact pad 20012 on the circuit board, thereby triggering the key signal.
[0033] like Figure 1 As shown, the circuit board 200 is designed with a metal film switch pin package 2001, and the metal film switch pin package 2001 is designed with four pin pads 20011 for connecting the four fixed pins 1001 of the metal film switch 100. These four pin pads ensure the precise positioning and stable installation of the metal film switch, and prevent the deviation or looseness during the metal film switch key pressing process. The metal film switch package 2001 is designed with a contact pad 20012, corresponding to the center contact 1002 of the metal film switch 100. When the key is pressed, the center contact of the metal film switch 100 will contact this contact pad 20012, thereby completing the signal transmission.
[0034] like Figure 3 As shown, the circuit board 200 is provided with a plurality of metal film switch packages 2001 in a matrix layout according to the key structure and circuit design. All metal film switch packages 2001 are connected to the column scanning circuit 2003 through the key matrix row scanning circuit 2002, and then the key signal interface 2004 interacts with the computer system. The plurality of metal film switch packages 2001 in a matrix layout are correspondingly assembled with the metal film switch 100. When the user presses a key on the key, the central contact 1002 of the metal film switch 100 will contact the contact pad 20012 on the circuit board 200. At this time, the row scanning line 2002 connected to the contact will detect the signal change. At the same time, the column scanning line 2003 corresponding to the key will also receive the signal through the fixed pin 1001 of the metal film switch 100. In this way, by combining row and column scanning, the system can accurately identify the pressed key position by the signal output by the key signal interface 2004. After identifying the key position, the system will transmit the corresponding key signal to the computer for processing, thereby realizing the input function of the key.
[0035] When implementing a complex key matrix layout on a single-layer circuit board, it is inevitable that the lines will cross. However, the design of the metal film switch 100 in this embodiment cleverly solves this problem. The design of the four fixed pins 1001 raising the metal film switch body allows the row scan line (or column scan line) to pass directly through the bottom of the metal film switch to avoid physical interference, thereby achieving a jumper or bridge function. In this way, even in the case of crossed lines, accurate transmission of the scan signal and the expected effect of the key function can be achieved.
[0036] Compared with the existing technology, the significant advantages of this application are not only reflected in the innovation of technology, but also have a profound impact on production costs, user experience and the simplicity of overall design. The following is a detailed description of these advantages:
[0037] 1. Innovative structural design of metal membrane switch:
[0038] 1. Simplified wiring: Through the unique design of the metal film switch, this application successfully simplifies the single-layer wiring of the key matrix circuit on the circuit board through jumpers. This design optimizes the circuit board stacking structure design, simplifies the circuit layout, reduces the need for inter-layer connections, and thus reduces the failure rate and cost in production.
[0039] 2. Compact structure: The innovative structure of the metal membrane switch not only meets the mechanical requirements of the key, but also cleverly simplifies the line crossing problem in the routing through its protruding fixed pins and center contact design, realizes the jumper and bridging functions, and makes the entire circuit board structure using the metal membrane switch more compact and efficient.
[0040] 2. Simplify the key structure:
[0041] 1. Remove the scissor foot support mechanism: Traditional buttons often use a scissor foot support mechanism to fix the button cap and provide a stable pressing feel. The metal film switch of this application directly replaces the scissor foot mechanism through its own elasticity and stability, greatly simplifying the button structure. This not only reduces the overall weight of the button, but also reduces the number of parts, improving production efficiency and reliability.
[0042] 2. Reduce assembly process: Since complex components such as scissor feet are removed, the button of the present application is also simpler and faster in the assembly process, reducing production costs and manpower requirements.
[0043] 3. Save production costs:
[0044] 1. Advantages of reducing the number of circuit board layers: Compared with traditional circuit boards with at least two layers of wiring, the reduction in the number of circuit board layers reduces material costs, processing costs, and testing costs. In addition, due to the simplified structure, the scrap rate and maintenance rate in the production process will also decrease accordingly, further saving production costs.
[0045] 2. Efficient production: The simplified button structure and single-layer wiring design make the production process more efficient and standardized, improving the production line's capacity and product quality.
[0046] 4. Improve user experience:
[0047] 1. Stable pressing feel: The innovative design of the metal film switch provides a stable and consistent pressing feel, and users can get good feedback and experience no matter how hard they press the button.
[0048] 2. Reduce noise: Since redundant mechanical parts are removed and friction between parts is reduced, the noise generated by the keys of the present application when pressing the keys is also greatly reduced, providing users with a quieter and more comfortable use environment.
[0049] In summary, this application has shown significant advantages in structural innovation, production efficiency, production cost, user experience, etc. Its unique metal film switch design and single-layer wiring not only simplify the key structure and reduce production costs, but also improve product reliability and user satisfaction, and has high application value and market prospects.
[0050] In the present application, each preferred scheme only focuses on describing the differences from other preferred schemes. As long as the preferred schemes do not conflict, they can be combined arbitrarily. The embodiments formed by the combination are also within the scope disclosed in this specification. Considering the simplicity of the text, this article will no longer separately describe the embodiments formed by the combination.
[0051] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
[0052] In this document, each preferred scheme only focuses on describing the differences from other preferred schemes. As long as the preferred schemes do not conflict, they can be combined arbitrarily. The embodiments formed by the combination are also within the scope disclosed in this specification. Considering the simplicity of the text, this document will no longer separately describe the embodiments formed by the combination.
[0053] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims
1. A circuit board with a jumper set by a metal film switch, characterized in that: The circuit board includes one or more metal film switches, and a plurality of pin positions are set at a preset position on the edge of a metal film switch on the circuit board. Correspondingly, a plurality of fixing pins are set at the bottom edge of the metal film switch. The metal film switch is attached to the circuit board by engaging with the corresponding pin positions through the plurality of fixing pins. The metal film switch is also provided with a center contact, and the fixing pin is higher than other edge parts of the metal film switch, so that the wiring of the circuit board passes through the bottom of the metal film switch, and the setting of jumper or bridge is realized through the fixing pin and / or the center contact.
2. The circuit board according to claim 1, characterized in that: It also includes: the multiple fixed pins are set corresponding to the bottom edge of the metal film switch, which specifically means: multiple evenly distributed fixed pins are set corresponding to the bottom edge of the metal film switch, the central contact of the metal film switch is at the center position of the metal film switch, the multiple fixed pins of the metal film switch are connected to the row scanning line, and when the metal film switch is pressed, the central contact is connected to the column scanning line.
3. The circuit board according to claim 2, characterized in that: It further comprises: a plurality of fixed pins of the metal film switch are connected to the column scanning wiring, and when the metal film switch is pressed, the central contact of the metal film switch is connected to the row scanning wiring.
4. The circuit board according to claim 2 or 3, characterized in that: The method of setting multiple pin positions at a preset position on the edge of a metal film switch on the circuit board specifically means that a metal film switch pin package is set on the circuit board, and the metal film switch pin package is provided with multiple pin pads corresponding to the fixed pins of the metal film switch, which are used to connect the corresponding multiple fixed pins of the metal film switch, and the multiple fixed pins of the metal film switch are connected to the column scanning line or the row scanning line through the corresponding pin pads.
5. The circuit board according to claim 4, characterized in that: It further includes: the metal film switch pin package is further provided with a contact pad, and the position of the contact pad is provided corresponding to the position of the central contact of the metal film switch.
6. The circuit board according to claim 5, characterized in that: Also includes: The circuit board is configured as a single-layer circuit board.
7. The circuit board according to claim 6, characterized in that: Further including: The shape of the metal film switch includes circle, ellipse or polygon.