Key FPC (Flexible Printed Circuit) integrated structure convenient to produce and assemble
By using an integrated design and positioning of the button FPC with a fixed structure, the production complexity and reliability issues caused by separate installation are solved, achieving the effects of simplified assembly, improved functional stability and user experience.
Patent Information
- Application Number
- CN202520412374.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-11
AI Technical Summary
In the existing technology, the volume switch FPC and the fingerprint key FPC are installed separately inside the phone, which increases the complexity of production and assembly, makes it easy to have assembly errors, signal attenuation or interference, affects functional reliability, increases costs and workload, and reduces production efficiency and user experience.
It adopts an integrated FPC structure for easy production and assembly, including an integrated design of power and volume FPC board, fingerprint key FPC board and connecting ribbon cable. Combined with the fixing structure of positioning holes, rubber locking blocks and sealing rings, it improves positioning accuracy and stability and reduces the risk of loosening.
It significantly simplifies the production and assembly process, reduces the risk of assembly errors, improves functional reliability and production efficiency, reduces costs, and enhances user experience and product quality.
Smart Images
Figure CN223843817U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of button FPC technology, and in particular to an integrated button FPC structure that is easy to manufacture and assemble. Background Technology
[0002] The FPC (Flexible Printed Circuit) for mobile phone buttons is a key component responsible for connecting the phone's buttons to the motherboard. These FPCs are typically made of flexible materials, enabling the transmission of electrical signals within a limited space, significantly reducing the complexity of the phone's internal layout. The design of the button FPC allows the phone to remain slim and lightweight while still ensuring good button responsiveness and durability. It not only reduces the size of traditional hardware connections but also effectively prevents circuit damage caused by space constraints.
[0003] In existing technologies, the volume switch FPC and the fingerprint key FPC are installed separately inside the phone. This design brings many drawbacks to production and assembly. First, the separate installation method increases the complexity of the assembly process, requiring workers to handle multiple components, which can easily lead to assembly errors and prolong production time. Second, the separate design increases the number of connection points, which can cause signal attenuation or interference, thus affecting the reliability of the function, such as unresponsive volume adjustment or fingerprint recognition failure. In addition, the separate components also need to be inspected separately during testing and quality inspection, which undoubtedly increases the workload and reduces overall production efficiency. At the same time, the separate installation design also leads to additional costs because it requires more materials and components, which not only affects the smoothness of the production line but also reduces product quality and user experience, thereby affecting brand reputation and market competitiveness. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an integrated button FPC structure that facilitates production and assembly.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: an integrated FPC structure for buttons that facilitates production and assembly, including a mobile phone frame. An FPC board placement slot is provided on one side of the mobile phone frame. A power and volume integrated FPC board is fixed to the inner wall of the FPC board placement slot. A volume up button is provided on one side of the power and volume integrated FPC board, a volume down button is provided on one side of the power and volume integrated FPC board, a power switch button is provided on one side of the power and volume integrated FPC board, and a fingerprint key FPC board is provided on one side of the power and volume integrated FPC board. One end of the fingerprint key FPC board is electrically connected to a connecting cable, and the other end of the connecting cable is electrically connected to one end of the power and volume integrated FPC board. A volume up button housing is provided on one side of the volume up button, a volume down button housing is provided on one side of the volume down button, and a pressing element is provided on one side of the power switch button. The pressing element is fixed to the bottom of the fingerprint key FPC board.
[0006] Preferably, the power and volume integrated FPC board has mounting positioning holes at each corner, and mounting positioning posts are fixed at each corner of the inner wall of the FPC board placement slot, with the mounting positioning holes nested within the surfaces of the mounting positioning posts. In the prior art, button FPCs typically lack positioning holes, leading to a series of installation problems. First, the lack of positioning holes makes it difficult to ensure accurate positioning of the FPC during assembly, increasing the risk of assembly errors. This not only results in functional defects in the final product but also increases subsequent repair and rework costs. Second, inaccurate positioning affects the sensitivity and stability of the buttons, reducing user experience. Furthermore, workers on the production line need to spend more time and effort manually adjusting and confirming the FPC's position, thus extending the production cycle and reducing overall efficiency. Over time, this leads to increased production costs and impacts the company's market competitiveness. To address these issues, this utility model adopts a positioning hole structure design, which, when the mobile phone... During the production and installation process, when installing the button FPC board, the mounting positioning holes at the corners of the power and volume integrated FPC board are aligned with the corresponding mounting positioning posts fixed to the inner wall of the FPC board placement slot. This completes the positioning of the button FPC board, significantly improving the accuracy of the assembly process and reducing the risk of assembly errors. This not only ensures the normal function of the final product but also reduces the cost of later maintenance and rework. At the same time, accurate positioning will improve the sensitivity and stability of the buttons, thereby improving the user experience. In addition, the work efficiency of workers on the production line will also be improved because they do not need to spend extra time on manual adjustments, shortening the production cycle, reducing overall production costs, and enhancing the company's competitiveness in the market.
[0007] Preferably, the inner wall of the FPC board placement groove is provided with a rubber locking block, and the top of the rubber locking block has a gripping groove. In the prior art, the flexible printed circuit board for buttons lacks further fixing methods after installation, which can lead to loosening or displacement of the buttons, affecting the user experience, reducing button sensitivity and reliability. Furthermore, the lack of effective fixing increases the risk of mechanical wear, thus affecting the overall durability and stability of the product, posing potential hazards for later maintenance and user use. To address these issues, this utility model adopts a clamping fixing structure. After the button FPC is installed, the rubber locking block is clamped into the inner wall of the FPC board placement groove. Since the width of the rubber locking block is greater than the width of the inner wall of the FPC board placement groove... This design effectively secures the power and volume integrated FPC board. When disassembly and maintenance are required, the rubber locking blocks can be easily removed by gripping the two locking slots, allowing for maintenance and repair of the power and volume integrated FPC board. This significantly improves the stability and reliability of the button FPC, reduces the risk of button loosening or displacement, and thus enhances the user experience. In addition, the enhanced securing design reduces mechanical wear, improves the overall durability and longevity of the product, ensures stable performance during long-term use, reduces the difficulty of later maintenance, and enhances user trust and satisfaction.
[0008] Preferably, a buffer spring is fixed to one side of the volume down button, and a buffer spring is fixed to one side of the volume up button. The buffer springs can effectively buffer the pressing force of the buttons, providing a more comfortable tactile feel and feedback. This buffering mechanism can not only reduce the mechanical wear of the buttons during frequent use, thereby improving the durability of the buttons, but also reduce user fatigue during use, enhance the overall user experience, and ensure more stable and durable operating performance.
[0009] Preferably, the surface of the fingerprint key FPC board is coated with an anti-fingerprint layer. The anti-fingerprint coating can effectively prevent the adhesion of fingerprints and dirt, keep the surface clean and smooth, thereby improving the user experience. In addition, the anti-fingerprint layer can also reduce the smoothness and blurring caused by fingerprints, making touch operation faster and more accurate, while extending the product's appearance life and maintaining its aesthetics.
[0010] Preferably, the top of the integrated power and volume FPC board is provided with a first sealing ring and a second sealing ring. The first sealing ring is fixed to the inner wall of the FPC board placement groove, and the second sealing ring is fixed to the inner wall of the FPC board placement groove. This effectively enhances the sealing performance of the FPC board, preventing the intrusion of dust and moisture, thereby improving the reliability and durability of the power and volume control modules. In addition, the sealing rings also help reduce vibration and noise, improving the overall user experience of the product.
[0011] Preferably, both the power and volume integrated FPC board and the fingerprint key FPC board adopt a multi-layer flexible circuit board structure. This effectively saves space, improves the signal transmission efficiency and reliability of the circuit, and the multi-layer structure makes the circuit connection more compact, reduces the complexity of wiring, and also increases the anti-interference ability and improves the overall functional stability. In addition, the application of flexible materials allows the PCB board to adapt to more complex shapes and installation requirements, promoting the lightweight and thin design of the product.
[0012] Beneficial effects:
[0013] 1. In existing technologies, the volume switch FPC and fingerprint key FPC are installed separately inside the phone. This design brings many drawbacks to production and assembly. First, the separate installation increases the complexity of the assembly process, requiring workers to handle multiple components, which can easily lead to assembly errors and extend production time. Second, the separate design increases the number of connection points, which can cause signal attenuation or interference, thus affecting the reliability of the function, such as unresponsive volume adjustment or fingerprint recognition failure. In addition, the separate components also need to be inspected separately during testing and quality inspection, which undoubtedly increases the workload and reduces overall production efficiency. At the same time, the separate installation design also leads to additional costs because it requires more materials and components, which not only affects the smoothness of the production line. This can also reduce product quality and user experience, thereby affecting brand reputation and market competitiveness. To address this issue, this utility model adopts an integrated design of volume switch button FPC and fingerprint button FPC, which significantly simplifies the mobile phone production and assembly process, reduces assembly errors, and improves production efficiency. This design reduces the number of connection points, reduces the risk of signal attenuation and interference, thereby enhancing the reliability of the function, improving the sensitivity of volume adjustment and the accuracy of fingerprint recognition. At the same time, the use of integrated components simplifies the testing and quality inspection process, reduces the workload, and further improves overall production efficiency. In addition, reducing the demand for materials and components can reduce production costs, improve product quality, and thus enhance brand reputation and market competitiveness.
[0014] 2. In existing technologies, button FPCs typically lack positioning holes, leading to a series of installation problems. First, the lack of positioning holes makes it difficult to ensure accurate positioning of the FPC during assembly, increasing the risk of assembly errors. This not only results in functional defects in the final product but also increases subsequent repair and rework costs. Second, inaccurate positioning affects the sensitivity and stability of the buttons, reducing user experience. Furthermore, workers on the production line need to spend more time and effort manually adjusting and confirming the position of the FPC, thus extending the production cycle and reducing overall efficiency. Over time, this leads to increased production costs and affects the company's market competitiveness. To address these issues, this utility model adopts a positioning hole structure design, significantly improving the accuracy of the assembly process and reducing the risk of assembly errors. This not only ensures the normal function of the final product but also reduces subsequent repair and rework costs. At the same time, accurate positioning will improve the sensitivity and stability of the buttons, thereby improving the user experience. In addition, the work efficiency of workers on the production line will also be improved because they do not need to spend extra time on manual adjustments, shortening the production cycle, reducing overall production costs, and enhancing the company's competitiveness in the market.
[0015] 3. In existing technologies, the flexible printed circuit board (FPC) for buttons lacks further fixing methods after installation. This can lead to loosening or displacement of the buttons, affecting the user experience and reducing their sensitivity and reliability. Furthermore, the lack of effective fixing increases the risk of mechanical wear, impacting the overall durability and stability of the product and posing potential hazards for later maintenance and user use. To address these issues, this invention employs a clamping fixing structure, significantly improving the stability and reliability of the button FPC, reducing the risk of button loosening or displacement, and thus improving the user experience. In addition, the enhanced fixing solution reduces mechanical wear, improves the overall durability and longevity of the product, ensures stable performance during long-term use, reduces the difficulty of later maintenance, and enhances user trust and satisfaction. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0017] Figure 2 This is an exploded view of the integrated button FPC structure of this utility model;
[0018] Figure 3 This is a three-dimensional structural diagram of the integrated button FPC structure of this utility model;
[0019] Figure 4 This is a three-dimensional structural diagram of the fingerprint-driven switch structure of this utility model;
[0020] Figure 5This is a three-dimensional structural diagram of the button FPC clamping structure of this utility model;
[0021] Figure 6 for Figure 5 Enlarged view of point A in the middle.
[0022] Legend:
[0023] 1. Mobile phone frame; 101. FPC board placement slot; 102. Power and volume integrated FPC board; 103. Fingerprint key FPC board; 104. Volume up button; 105. Volume down button; 106. Power button; 107. Connecting flex cable; 108. Pressing component; 109. Volume up button shell; 110. Volume down button shell; 2. Mounting positioning hole; 201. Mounting positioning post; 3. Rubber locking block; 301. Grip groove; 4. Buffer spring one; 401. Buffer spring two; 5. Sealing ring one; 501. Sealing ring two. Detailed Implementation
[0024] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.
[0025] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific implementation examples:
[0027] Reference Figure 1-6The integrated FPC structure for buttons, which is easy to manufacture and assemble, includes a mobile phone frame 1. An FPC board placement slot 101 is provided on one side of the mobile phone frame 1. A power and volume integrated FPC board 102 is fixed to the inner wall of the FPC board placement slot 101. A volume up button 104 is provided on one side of the power and volume integrated FPC board 102. A volume down button 105 is provided on one side of the power and volume integrated FPC board 102. A power switch button 106 is provided on one side of the power and volume integrated FPC board 102. A fingerprint key FPC board 103 is provided on one side of the power and volume integrated FPC board 102. A connecting ribbon cable 107 is electrically connected to one end of the fingerprint key FPC board 103, and the other end of the connecting ribbon cable 107 is electrically connected to one end of the power and volume integrated FPC board 102. A volume up button shell 109 is provided on one side of the volume up button 104. A volume down button shell 110 is provided on one side of the volume down button 105. A pressing element 108 is provided on one side of the power switch button 106. The pressing element 108 is fixed to the bottom of the fingerprint key FPC board 103. In existing technologies, the volume switch FPC and the fingerprint sensor FPC are installed separately inside the phone. This design brings many drawbacks to production and assembly. First, the separate installation increases the complexity of the assembly process, requiring workers to handle multiple components, which can easily lead to assembly errors and extend production time. Second, the separate design increases the number of connection points, which can cause signal attenuation or interference, thus affecting the reliability of the function, such as unresponsive volume adjustment or fingerprint recognition failure. In addition, the separate components need to be inspected separately during testing and quality control, which undoubtedly increases the workload and reduces overall production efficiency. At the same time, the separate installation design also leads to additional costs because it requires more materials and components, which not only affects... Disruptions to the production line can reduce product quality and user experience, thereby affecting brand reputation and market competitiveness. To address this issue, this utility model adopts an integrated design of the volume switch button FPC and the fingerprint button FPC. During the production and assembly of mobile phones, the integrated design of the power and volume integrated FPC board 102 and the fingerprint button FPC board 103 connected by the connecting cable 107 simplifies the production and assembly process. It changes the original requirement of separately installing the power and volume integrated FPC board 102 and the fingerprint button FPC board 103 to only requiring the installation of one FPC board. By pressing the fingerprint button FPC board 103, the power button is activated by the pressing element 108.
[0028] The power and volume integrated FPC board 102 has mounting positioning holes 2 at each corner, and mounting positioning posts 201 are fixed at each corner of the inner wall of the FPC board placement groove 101. The mounting positioning holes 2 are nested on the surface of the mounting positioning posts 201. In existing technologies, button FPCs typically lack positioning holes, which leads to a series of installation problems. First, the lack of positioning holes makes it difficult to ensure accurate positioning of the FPC during assembly, increasing the risk of assembly errors. This not only leads to functional defects in the final product but also increases subsequent repair and rework costs. Second, inaccurate positioning affects the sensitivity and stability of the buttons, reducing user experience. Furthermore, workers on the production line need to spend more time and effort manually adjusting and confirming the position of the FPC, thus extending the production cycle and reducing overall efficiency. In the long run, this leads to increased production costs and affects the company's market competitiveness. To address these issues, this utility model adopts a positioning hole structure design. When installing the button FPC board during the production and installation of mobile phones, the mounting positioning holes 2 opened at the corners of the power and volume integrated FPC board 102 are engaged with the corresponding mounting positioning posts 201 fixed to the inner wall of the FPC board placement groove 101, thereby completing the positioning of the button FPC board.
[0029] The inner wall of the FPC board placement slot 101 is provided with a rubber locking block 3, and the top of the rubber locking block 3 has a gripping groove 301. In the prior art, the flexible printed circuit FPC for buttons lacks further fixing means after installation, which leads to loosening or displacement of the buttons, affecting the user experience and reducing the sensitivity and reliability of the buttons. In addition, the lack of effective fixing also increases the risk of mechanical wear, thereby affecting the overall durability and stability of the product, and bringing potential hazards to later maintenance and user use. To address these issues, this utility model adopts a clamping fixing structure. After the button FPC is installed, the rubber locking block 3 is clamped into the inner wall of the FPC board placement slot 101. Since the width of the rubber locking block 3 is greater than the width of the inner wall of the FPC board placement slot 101, it can effectively further fix the power and volume integrated FPC board 102. When it is necessary to disassemble and maintain the power and volume integrated FPC board 102, the rubber locking block 3 can be easily removed by gripping the two gripping grooves 301, thereby enabling maintenance and repair of the power and volume integrated FPC board 102.
[0030] A buffer spring 4 is fixed to one side of the volume down button 105, and a buffer spring 401 is fixed to one side of the volume up button 104. The buffer springs can effectively buffer the pressing force of the buttons, providing a more comfortable tactile feel and feedback. This buffering mechanism can not only reduce the mechanical wear of the buttons during frequent use, thereby improving the durability of the buttons, but also reduce user fatigue during use, enhance the overall user experience, and ensure more stable and durable operating performance. The surface of the fingerprint key FPC board 103 is coated with an anti-fingerprint coating. The anti-fingerprint coating can effectively prevent the adhesion of fingerprints and dirt, keep the surface clean and smooth, thereby improving the user experience. In addition, the anti-fingerprint coating can also reduce the smoothness and blur left by fingerprints, making touch operation faster and more accurate, while extending the product's appearance life and maintaining its aesthetics. The top of the power and volume integrated FPC board 102 is equipped with a sealing ring 5 and a sealing ring 6. Sealing ring 2 501, along with sealing ring 1 5, is fixed to the inner wall of the FPC board placement slot 101. This effectively enhances the sealing performance of the FPC board, preventing the intrusion of dust and moisture, thereby improving the reliability and durability of the power and volume control modules. In addition, the sealing rings also help reduce vibration and noise, improving the overall user experience of the product. The power and volume integrated FPC board 102 and the fingerprint key FPC board 103 both adopt a multi-layer flexible circuit board structure, which can effectively save space and improve the signal transmission efficiency and reliability of the circuit. The multi-layer structure makes the circuit connection more compact, reduces the complexity of wiring, and also increases the anti-interference ability and improves the stability of the overall function. Furthermore, the application of flexible materials allows the PCB board to adapt to more complex shapes and installation requirements, promoting the lightweight and thin design of the product.
[0031] The working principle of this utility model is as follows: During the production and assembly of mobile phones, the integrated design of the power and volume integrated FPC board 102 and the fingerprint key FPC board 103 connected by the connecting cable 107 simplifies the production and assembly process. It reduces the need to install the power and volume integrated FPC board 102 and the fingerprint key FPC board 103 separately to installing only one FPC board. By pressing the fingerprint key FPC board 103, the power button is activated by the pressing element 108. During the production and assembly of the mobile phone, the installation of the key FPC board is carried out at the corner of the power and volume integrated FPC board 102. The positioning hole 2 engages with the corresponding mounting positioning post 201 fixed to the inner wall of the FPC board placement slot 101, thus completing the positioning of the button FPC board. After the button FPC is installed, the rubber locking block 3 is snapped into the inner wall of the FPC board placement slot 101. Since the width of the rubber locking block 3 is greater than the width of the inner wall of the FPC board placement slot 101, it can effectively further fix the power and volume integrated FPC board 102. When it is necessary to disassemble and maintain the power and volume integrated FPC board 102, the rubber locking block 3 can be easily disassembled by gripping the two gripping slots 301, thereby enabling the maintenance and repair of the power and volume integrated FPC board 102.
[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An integrated button FPC structure that facilitates production and assembly, including a mobile phone mid-frame (1), characterized in that: An FPC board placement slot (101) is provided on one side of the mobile phone frame (1). A power and volume integrated FPC board (102) is fixed on the inner wall of the FPC board placement slot (101). A volume up button (104) and a volume down button (105) are provided on one side of the power and volume integrated FPC board (102). A power switch button (106) and a fingerprint key FPC are provided on one side of the power and volume integrated FPC board (102). The fingerprint key FPC board (103) is electrically connected to a connecting cable (107) at one end, and the connecting cable (107) is electrically connected to a power volume integrated FPC board (102) at the other end. The volume up button (104) has a volume up button shell (109) on one side, and the volume down button (105) has a volume down button shell (110) on one side. The power switch button (106) has a pressing part (108) on one side, and the pressing part (108) is fixed to the bottom of the fingerprint key FPC board (103).
2. The integrated button FPC structure according to claim 1, which facilitates production and assembly, is characterized in that: The power volume integrated FPC board (102) is provided with mounting positioning holes (2) at all corners, and mounting positioning posts (201) are fixed at all corners of the inner wall of the FPC board placement groove (101). The mounting positioning holes (2) are nested on the surface of the mounting positioning posts (201).
3. The integrated button FPC structure according to claim 1, which facilitates production and assembly, is characterized in that: The inner wall of the FPC board placement groove (101) is provided with a rubber locking block (3), and the top of the rubber locking block (3) is provided with a gripping groove (301).
4. The integrated button FPC structure according to claim 1, which facilitates production and assembly, is characterized in that: A buffer spring (4) is fixed on one side of the volume down button (105), and a buffer spring (401) is fixed on one side of the volume up button (104).
5. The integrated button FPC structure according to claim 1, characterized in that: The fingerprint key FPC board (103) has an anti-fingerprint coating on its surface.
6. The integrated button FPC structure according to claim 1, characterized in that: The power volume integrated FPC board (102) is provided with a sealing ring one (5) and a sealing ring two (501) on the top. The sealing ring one (5) is fixed to the inner wall of the FPC board placement groove (101), and the sealing ring two (501) is fixed to the inner wall of the FPC board placement groove (101).
7. The integrated button FPC structure according to claim 1, characterized in that: Both the power and volume integrated FPC board (102) and the fingerprint key FPC board (103) adopt a multi-layer flexible circuit board structure.