Mechanism capable of realizing convenient connection between piezoelectric integrated skin and circuit board
By using soft wire media in the connection of piezoelectric integrated skin and circuit board, the problems of poor connection stability, high cost and difficult production in the prior art are solved, and a low-cost and high-stability connection solution is achieved.
Patent Information
- Application Number
- CN202421566167.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The existing piezoelectric integrated skin and circuit board connection have problems such as material limitations, high cost, easy damage and difficult production of sample components, making it difficult to achieve a low-cost and high-stability connection solution.
Use soft wires as the medium for connecting the piezoelectric meter skin to the circuit board. By reasonably setting up the soft wire structure and connection and fixing methods, the stability of the connection is improved without increasing the thickness of the skin to avoid damage to the skin.
It realizes convenient connection between the piezoelectric meter skin and the circuit board, improves the stability of the connection, reduces costs, and maintains the overall performance of the meter skin.
Smart Images
Figure CN222954172U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of automobile interior decoration products, and particularly relates to a mechanism capable of realizing convenient connection between a piezoelectric integrated skin and a circuit board. Background Art
[0002] As people's lifestyles and life concepts change, the use of cars continues to expand. Cars have transformed from traditional driving cockpits to smart cockpits. Cars will gradually become people's second living rooms and third living spaces. The smart cockpit provides users with a more pleasant driving experience by combining technology with comfort.
[0003] In order to adapt to the change of vehicle usage scenarios, automotive interiors are increasingly integrating optical lighting, electronic display, control and other functions. IP and DP have become important interactive components, and traditional surfaces will integrate ambient lighting, control, entertainment and other functions to reflect the technological sense of the interior. As a result, more and more piezoelectric integrated skins and 3D circuit products have emerged.
[0004] Existing piezoelectric integrated leather / fabric / film products (hereinafter referred to as multifunctional skins) are connected to the circuit board connector by making pins on themselves or by welding wire harnesses, pins and other solutions. Welding or pin solutions will increase the thickness of the skin or damage the skin, and the process is also difficult. Plugging the leather pins into the circuit board will have the following problems:
[0005] (1) Material limitations: Since most connectors are standard parts, there are certain requirements for the thickness and hardness of the plug-in material. When the material thickness is too thick, it will cause difficulty in plugging in. When the material is too thin, it will loosen and fall off, resulting in the inability to achieve the function. At the same time, if the material does not reach a certain hardness, it will also cause difficulty in plugging in.
[0006] (2) Excessive cost: In order to ensure that the multifunctional skin can be successfully connected to the circuit board, a customized connector is required, which will result in each product requiring a specific connector, involving development costs and mold costs, which increases the cost of use.
[0007] (3) Easy to damage: The circuit on the multifunctional skin is generally integrated by printing. If it needs to be repeatedly plugged in and disassembled with the circuit board during installation or use, the printed coating will fall off and its function will be lost.
[0008] (4) Sample production is difficult: Since the skin plays a decorative role, it is usually not allowed to have holes or splices. This requires that the skin be connected to the circuit board by bypassing the underlying substrate layer, which increases the difficulty of production. If the pins are too long, they will break and the utilization rate of the skin will also decrease.
[0009] In view of the above situation, it is currently necessary to develop a low-cost, high-stability connection solution that can connect the piezoelectric skin to the circuit board. Utility Model Content
[0010] The purpose of the utility model is to provide a mechanism that can realize convenient connection between a piezoelectric integrated skin and a circuit board, which uses a soft flat cable as a medium for connecting the piezoelectric skin and the circuit board, and through the reasonable arrangement of the soft flat cable structure and the connection and fixing method of the soft flat cable, can improve the stability of the connection between the piezoelectric skin and the circuit board, and does not need to increase the thickness of the piezoelectric table, and will not damage the piezoelectric skin.
[0011] The technical solution provided by the utility model is:
[0012] A mechanism capable of realizing convenient connection between a piezoelectric integrated skin and a circuit board, comprising:
[0013] A piezoelectric skin, which is made of a flexible material; the inner surface of the piezoelectric skin has a flexible circuit layer;
[0014] A circuit board, which is arranged inside the piezoelectric skin;
[0015] A substrate layer, which is made of hard plastic and is disposed between the circuit board and the piezoelectric skin;
[0016] A flexible flat cable, comprising a piezoelectric skin connection end, a main body and a circuit board connection end connected in sequence; the piezoelectric skin connection end is conductively bonded to a corresponding pin of the circuit layer, and the circuit board connection end is connected to a corresponding pin of the circuit board;
[0017] Wherein, the flexible flat cable is an integrated structure, the piezoelectric skin connection end is made of the same material as the main body, and the width of the piezoelectric skin connection end is greater than the width of the main body;
[0018] A positioning groove is provided at a position of the substrate layer facing the circuit layer, and the piezoelectric skin connection end is embedded in the positioning groove. The top surface of the piezoelectric skin connection end is flush with the top surface of the substrate layer.
[0019] Preferably, the piezoelectric skin connection end is bonded to the circuit layer by means of a substrate-free conductive double-sided adhesive.
[0020] Preferably, the thickness of the substrate-free conductive double-sided adhesive is 10 μm to 50 μm.
[0021] Preferably, a flexible flat cable passing hole is formed on the base material layer, and the flexible flat cable passes through the flexible flat cable passing hole.
[0022] Preferably, the flexible flat cable passing hole is a rectangular hole, the length of which matches the width of the main body of the flexible flat cable, and the width is 1 mm to 2 mm.
[0023] Preferably, the number of pins on the piezoelectric skin connection end is greater than or equal to the number of pins on the circuit layer.
[0024] Preferably, the pin width and the pin spacing on the piezoelectric skin connection end are both set to be greater than 1 mm.
[0025] Preferably, the circuit layer is arranged on the inner surface of the piezoelectric skin by printing, etching or printing.
[0026] Preferably, the circuit board connection end is welded on a pin of the circuit board or connected to the circuit board via a circuit board connector.
[0027] Preferably, the core material of the flexible flat cable is silver wire, copper wire, molybdenum-copper alloy or copper-nickel alloy.
[0028] The beneficial effects of the utility model are:
[0029] The utility model provides a mechanism that can realize convenient connection between the piezoelectric integrated skin and the circuit board, uses the soft flat cable as the medium for connecting the piezoelectric skin and the circuit board, and through the reasonable arrangement of the structure of the soft flat cable and the connection and fixing method of the soft flat cable, it can improve the stability of the connection between the piezoelectric skin and the circuit board and reduce the cost. There is no need to increase the thickness of the piezoelectric table, and the piezoelectric skin will not be damaged. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 This is a schematic diagram of the overall structure of the mechanism for realizing convenient connection between the piezoelectric integrated skin and the circuit board according to the utility model.
[0031] Figure 2 It is a structural schematic diagram of the flexible flat cable described in the utility model.
[0032] Figure 3 It is a structural schematic diagram of the substrate layer described in the utility model. DETAILED DESCRIPTION
[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.
[0034] like Figure 1-3 As shown, the utility model provides a mechanism that can realize convenient connection between a piezoelectric integrated skin and a circuit board, which mainly includes: a piezoelectric skin 110 , a substrate layer 120 , a flexible flat cable 130 and a circuit board 140 .
[0035] The piezoelectric skin 110 is made of a flexible material, including but not limited to piezoelectric integrated leather, piezoelectric integrated fabric, piezoelectric integrated film, 3D circuit, etc. The inner surface of the piezoelectric skin 110 has a flexible circuit layer 111, and the circuit layer 111 includes a key area. The key area has a light-transmitting key mark, and the key mark part is transmitted on the outer surface of the piezoelectric skin 110 to facilitate the user to perform key operations.
[0036] The circuit board 140 is a PCB board, and is disposed inside the piezoelectric skin 110. The substrate layer 120 is made of hard plastic material, and is disposed between the circuit board 140 and the piezoelectric skin 140 to provide support for the piezoelectric skin 110.
[0037] Preferably, the substrate layer 120 is made of plastic material such as ADS, PP or PA6.
[0038] The flexible flat cable 130 is composed of a piezoelectric skin connection end 131, a main body 132 and a circuit board connection end 133 which are connected in sequence. The piezoelectric skin connection end 131 is conductively bonded to the corresponding pin of the circuit layer 111, and the circuit board connection end 133 is connected to the corresponding pin of the circuit board 140. The flexible flat cable 130 is an integrated structure, the piezoelectric skin connection end 131 and the main body 132 are made of the same material (both are flexible), the main body 132 is insulated and plastic-sealed, and a reinforcing plate is provided at the circuit board connection end 133 to facilitate connection with the circuit board 140. The width of the piezoelectric epidermis connection end 131 is greater than the width of the main body 132, which can increase the width and pin spacing of the pins on the piezoelectric epidermis connection end 131. Since the pins on the circuit layer 111 are consistent with the size of the piezoelectric epidermis connection end 131, the width and pin spacing of the pins on the circuit layer 111 are increased, thereby reducing the requirements for the precision of the production of the circuit layer 111 and reducing the difficulty of producing the circuit layer 111; the tolerance of the pin connection between the flexible flat cable 130 and the circuit layer 111 can also be appropriately relaxed, thereby reducing the difficulty of connecting the flexible flat cable 130 and the circuit layer 111.
[0039] As a preferred embodiment, the pin width and the pin spacing on the piezoelectric skin connection end 131 are both set to be greater than 1 mm. In actual use, they can be appropriately increased according to the area of the piezoelectric skin 110.
[0040] Preferably, the circuit layer 111 is disposed on the inner surface of the piezoelectric skin 140 by printing, etching or printing.
[0041] Among them, a positioning groove 121 is provided at a position of the substrate layer 120 facing the circuit layer 111, and the piezoelectric skin connection end 131 is embedded in the positioning groove 121. The thickness of the positioning groove 121 is the same as the thickness of the soft flat cable 130 (piezoelectric skin connection end 131), and the plane size matches the plane size of the piezoelectric skin connection end 131, which can ensure the coating stability and prevent the piezoelectric skin connection end 131 from moving or falling off. At the same time, it can also prevent the thickness of the soft flat cable 130 from being too large, causing bulges on the surface of the piezoelectric skin 110, affecting the coating appearance of the piezoelectric skin 110.
[0042] As a preferred embodiment, the piezoelectric epidermis connection end 131 is bonded to the circuit layer 140 by a substrate-free conductive double-sided adhesive. The circuit layer 111 on the inner surface of the piezoelectric epidermis 110 is connected to the corresponding pin of the piezoelectric epidermis connection end 131 by the substrate-free conductive double-sided adhesive. When the conductive filler inside the substrate-free conductive double-sided adhesive is pressed, a conductive path can be formed, so that the circuit layer 111 and the corresponding pins of the flexible flat cable 130 are vertically conductive, and the conductive seasoning is relatively dispersed in the tape, which can achieve non-conduction between parallel lines, so that short circuit will not occur. The thickness of the substrate-free conductive double-sided adhesive is 10μm to 50μm, which basically does not increase the connection thickness.
[0043] The circuit board connection end 133 of the soft flat cable 130 is connected to the circuit board 140. After the connection, the circuit layer 111 of the piezoelectric skin 110 corresponds to the corresponding pins on the circuit board through the soft flat cable medium. After the relevant functions are defined by software, the piezoelectric skin 110 has piezoelectric functions, and the corresponding functions can be realized through the corresponding button positions on the piezoelectric skin 110.
[0044] The flexible flat cable 130 and the circuit board 140 may be connected via a circuit board connector or by directly soldering the circuit board connection end 133 of the flexible flat cable to the pin of the circuit board 140 .
[0045] like Figure 1 As shown, in this embodiment, a circuit board connector 141 is used to connect the flexible flat cable 130 and the circuit board 140. The circuit board connector 141 can be made of standard parts and can be made into a push-type or plug-in type according to product requirements; the connection between the flexible flat cable 130 and the circuit board 140 includes but is not limited to a drawer type, a front cover type, a rear cover type, etc.
[0046] As a further preferred embodiment, a flexible flat cable through hole 122 is provided on the substrate layer 120, and the flexible flat cable 130 passes through the flexible flat cable through hole 122. The flexible flat cable through hole 122 is provided so that the flexible flat cable 130 does not need to go around the edge of the substrate layer 120 when connecting the circuit board 140, which can reduce the length of the flexible flat cable 130, and can fix the position of the flexible flat cable 130 to prevent the flexible flat cable 130 from moving. The flexible flat cable through hole 122 is a rectangular through hole, and the width should not be too large, generally set to 1mm-2mm, and the length is consistent with the width of the main body 132 of the flexible flat cable 130, and the tolerance is generally 0.3mm. Among them, the flexible flat cable through hole 122 is set close to the positioning groove 121, so that it can be avoided that there is still a flexible flat cable 130 that is not embedded in the positioning groove 121 between the positioning groove 121 and the flexible flat cable through hole 122, resulting in an uneven surface of the piezoelectric epidermis 110.
[0047] The wire core of the flexible flat cable 130 includes but is not limited to conductive materials such as silver wire, copper wire, molybdenum-copper alloy, and copper-nickel alloy. The line and shape profile can be adjusted according to the actual state of the product. The piezoelectric skin connection end 131 and the circuit board connection end 133 can be made into a two-way window or a one-way window as needed. The application form of the flexible flat cable 130 includes but is not limited to vertical stickers, horizontal stickers, etc. The production methods of the flexible flat cable 130 include but are not limited to single-sided soft boards, ordinary double-sided boards, substrate sound field single-sided boards, substrate generated double-sided boards, etc.
[0048] In order to further increase versatility and reduce product costs, a connector with a corresponding number of pins can be selected according to product line requirements, and the flexible flat cable 130 can be designed as a universal product, and the redundant lines can be idle, and the pins that need to be connected can be defined by software to realize the corresponding functions. That is, the number of pins on the piezoelectric epidermis connection end 131 (i.e., the flexible flat cable 130) is greater than or equal to the number of pins on the circuit layer 111.
[0049] During the preparation process, the piezoelectric skin 110 and the flexible flat cable 130 need to be connected by conductive glue first, and then the glue spraying or glue coating process (for bonding during coating) is carried out. When spraying the glue, the position of the flexible flat cable 130 needs to be covered and protected to prevent the circuit from failing due to the glue covering. After spraying the glue, the coating process is carried out. When coating, the flexible flat cable 130 (circuit board connection end 133) needs to be passed through the flexible flat cable through hole 122 on the substrate layer 120, and the connection position of the flexible flat cable 130 and the skin needs to be aligned and fitted with the positioning groove 121 of the substrate layer 120, and then the subsequent coating process is carried out. After coating, the flexible flat cable 130 is plugged, welded or crimped into the circuit board connector, and then the subsequent assembly process is carried out.
[0050] The application scope of the utility model is automotive interior functional surface covering products, including but not limited to IP, DP, CC, seats, headrests, ceilings, armrests and other covering products, and can also be applied to the connection solutions between 3D circuit products and circuit boards.
[0051] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.
Claims
1. A mechanism for conveniently connecting a piezoelectric integrated skin to a circuit board, characterized in that: include: A piezoelectric skin, which is made of a flexible material; the inner surface of the piezoelectric skin has a flexible circuit layer; A circuit board, which is arranged inside the piezoelectric skin; A substrate layer, which is made of hard plastic and is disposed between the circuit board and the piezoelectric skin; A flexible flat cable, comprising a piezoelectric skin connection end, a main body and a circuit board connection end connected in sequence; the piezoelectric skin connection end is conductively bonded to a corresponding pin of the circuit layer, and the circuit board connection end is connected to a corresponding pin of the circuit board; Wherein, the flexible flat cable is an integrated structure, the piezoelectric skin connection end is made of the same material as the main body, and the width of the piezoelectric skin connection end is greater than the width of the main body; A positioning groove is provided at a position of the substrate layer facing the circuit layer, and the piezoelectric skin connection end is embedded in the positioning groove. The top surface of the piezoelectric skin connection end is flush with the top surface of the substrate layer.
2. The mechanism for realizing convenient connection between a piezoelectric integrated skin and a circuit board according to claim 1, characterized in that: The piezoelectric skin connection end is bonded to the circuit layer by means of a substrate-free conductive double-sided adhesive.
3. The mechanism for conveniently connecting a piezoelectric integrated skin to a circuit board according to claim 2, characterized in that: The thickness of the substrate-free conductive double-sided adhesive is 10 μm to 50 μm.
4. The mechanism for realizing convenient connection between a piezoelectric integrated skin and a circuit board according to claim 3, characterized in that: The base material layer is provided with a flexible flat cable passing hole, and the flexible flat cable passes through the flexible flat cable passing hole.
5. The mechanism for realizing convenient connection between a piezoelectric integrated skin and a circuit board according to claim 4, characterized in that: The flexible flat cable passing hole is a rectangular hole, the length of which matches the width of the main body of the flexible flat cable, and the width is 1 mm to 2 mm.
6. The mechanism for conveniently connecting a piezoelectric integrated skin to a circuit board according to any one of claims 1 to 5, characterized in that: The number of pins on the piezoelectric skin connection end is greater than or equal to the number of pins on the circuit layer.
7. The mechanism for realizing convenient connection between a piezoelectric integrated skin and a circuit board according to claim 6, characterized in that: The pin width and pin spacing on the piezoelectric skin connection end are both set to be greater than 1 mm.
8. The mechanism for realizing convenient connection between a piezoelectric integrated skin and a circuit board according to claim 7, characterized in that: The circuit layer is arranged on the inner surface of the piezoelectric skin by printing, etching or printing.
9. The mechanism for conveniently connecting a piezoelectric integrated skin to a circuit board according to claim 8, characterized in that: The circuit board connection end is welded on the pin of the circuit board or connected to the circuit board through a circuit board connector.
10. The mechanism for realizing convenient connection between a piezoelectric integrated skin and a circuit board according to claim 9, characterized in that: The core material of the flexible flat cable is silver wire, copper wire, molybdenum-copper alloy or copper-nickel alloy.