A mobile phone key conductive layer automatic pasting device

Abstract

The utility model relates to mobile phone key assembly technical field especially relates to a kind of mobile phone key conductive layer automatic laminating equipment, including chassis, laminating structure is arranged on the chassis, adjusting structure is equipped on the chassis;The automatic laminating equipment of a kind of mobile phone key conductive layer, through the laminating structure of setting, worm gear is the power transmission system of core, is combined with the high-precision rack and pinion linear transmission mechanism, realizes the high-precision, high stability positioning and lamination of the pot piece that patch head adsorbs in three-dimensional space.Its core beneficial effect lies in: worm gear drive has natural self-locking characteristic, can effectively eliminate reverse clearance and inertial impact in the movement process, ensure the absolute stability of the mounting process;Meanwhile, the transmission chain accurately converts the rotary motion of motor into the smooth linear feed of patch head, not only realizes the accurate control to laminating pressure and stroke, more fundamentally eliminates the positioning deviation caused by vibration or external force interference.

Description

Technical Field

[0001] This utility model relates to the field of mobile phone button assembly technology, and in particular to an automatic bonding device for the conductive layer of mobile phone buttons. Background Technology

[0002] In current smartphone manufacturing processes, the realization of button functions relies on the synergistic effect of its core components—the conductive layer and the dome switch. This conductive layer is usually made of special carbonaceous materials or metal coatings, possessing excellent conductivity and mechanical flexibility. As a compressible soft contact point, it is arranged between the button structure and the circuit board, playing a key role in the electrical circuit. When the button is pressed, the conductive layer instantly connects to the discrete electrodes on the circuit board below, forming a closed circuit, thereby transmitting a trigger signal to the motherboard and completing the command input.

[0003] Among them, the dome switch, as a metal spring structure that provides clear tactile feedback, often has a conductive layer attached to its inner top through electroplating or bonding to form an integrated functional component. Such dome switches with conductive layers need to be precisely assembled onto the flexible circuit board of the mobile phone to form a complete button module together with other surface mount components.

[0004] However, in most current production processes, the process of mounting the dome switch onto the flexible circuit board still relies heavily on manual operation. Operators must position, apply glue, and bond the dome switch under a microscope. This method is not only slow and has limited production capacity, but also prone to quality abnormalities such as positional deviation, uneven glue application, and static damage due to human factors, ultimately affecting the consistency of button feel and the long-term reliability of the product. Utility Model Content

[0005] The purpose of this invention is to provide an automatic bonding device for conductive layers of mobile phone buttons, in order to solve the problem mentioned in the background art that in most existing production processes, the process of bonding the dome switch to the flexible circuit board still relies heavily on manual operation. Operators must position, apply glue and bond the dome switch under a microscope. This method is not only slow and has limited production capacity, but also prone to quality abnormalities such as positional deviation, uneven glue application and electrostatic damage due to human factors, which ultimately affect the consistency of button feel and the long-term reliability of the product.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic bonding device for conductive layers of mobile phone buttons, including a base frame, a bonding structure provided on the base frame, and an adjustment structure provided on the base frame; The bonding structure includes a placement frame, a sleeve on the placement frame, a movable rack movably disposed within the sleeve, a patch head on the movable rack, a rotating shaft on the placement frame, a transmission gear on the rotating shaft meshing with the movable rack, a fixed frame on the placement frame, a worm gear movably disposed on the fixed frame and connected to the rotating shaft, a worm movably disposed on the fixed frame and meshing with the worm gear, and a first motor on the fixed frame with its drive end connected to the worm.

[0007] Preferably, the first motor is fixed to the mounting frame by bolts, and the mounting frame is provided with reinforcing ribs.

[0008] Preferably, the base frame is provided with support legs, and the movable rack is adapted to the sleeve.

[0009] Preferably, the adjustment structure includes a placement plate mounted on the base frame. The placement plate has an annular slide rail, a sliding block movably mounted on the annular slide rail, a rotating frame mounted on the sliding block, a support frame on the placement plate, a clamping device mounted on the rotating frame, a rotating shaft movably mounted on the support frame and connected to the rotating frame, a rotating gear mounted on the rotating shaft, a second motor mounted on the support frame, a rotating gear at the drive end of the second motor meshing with the rotating gear, a limiting hole on the rotating shaft, and an electric push rod on the placement plate. The driving end of the electric push rod has a limiting rod abutting against the limiting hole.

[0010] Preferably, the sliding block is provided in pairs, and the limiting hole is adapted to the limiting rod.

[0011] Preferably, the support frame is provided with reinforcing ribs, and the clamping device is provided in pairs.

[0012] Preferably, the limiting holes are provided in a plurality of manner, and the second motor is fixed to the support frame by bolts.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This automatic bonding device for conductive layers of mobile phone buttons, through a designed bonding structure and a worm gear-based power transmission system combined with a precision gear and rack linear transmission mechanism, achieves high-precision and high-stability positioning and bonding of the dome switch held by the bonding head in three-dimensional space. Its core advantages are: the worm gear transmission possesses inherent self-locking characteristics, effectively eliminating backlash and inertial impact during movement, ensuring absolute stability in the bonding process; simultaneously, this transmission chain precisely converts the rotational motion of the motor into a smooth linear feed of the bonding head, achieving precise control of bonding pressure and stroke, and fundamentally eliminating positioning deviations caused by vibration or external interference. This ensures the uniformity and reliability of the conductive layer contact interface between the dome switch and the flexible circuit board at the microscale, significantly improving product assembly yield and long-term electrical stability.

[0014] 2. This automatic bonding equipment for conductive layers of mobile phone buttons achieves precise, stable, and efficient control of the spatial posture of the flexible circuit board through a set adjustment structure, a highly stable annular slide rail guiding system, and a rigid limiting device. The motor-driven gear transmission system smoothly and accurately rotates the circuit board to the optimal working angle, significantly improving the accessibility and ease of operation of the bonding process. Simultaneously, the innovative "electric push rod-limit rod" locking mechanism can quickly achieve rigid fixation at any preset position, effectively eliminating the risks of vibration loosening and positioning backlash inherent in traditional manual locking methods. This provides crucial repeatability and superior process stability for high-precision bonding processes in dynamic production environments, ultimately ensuring the consistency and reliability of product assembly quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from another perspective; Figure 3 This is a schematic diagram of the structure of the limiting hole and the limiting rod of this utility model; Figure 4 This is a partial cross-sectional view of the fixing frame of this utility model; In the diagram: 1. Base frame; 2. Fitting structure; 201. Sleeve; 202. Moving rack; 203. Patch head; 204. Placement frame; 205. Rotating shaft; 206. Transmission gear; 207. Fixing frame; 208. Worm gear; 209. Worm; 210. First motor; 3. Adjustment structure; 301. Placement plate; 302. Circular slide rail; 303. Sliding block; 304. Rotating frame; 305. Press; 306. Support frame; 307. Rotating shaft; 308. Rotating gear; 309. Second motor; 310. Rotating gear; 311. Limiting hole; 312. Electric push rod; 313. Limiting rod. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-4 This utility model provides a technical solution: an automatic bonding device for conductive layers of mobile phone buttons, including a base frame 1, a bonding structure 2 provided on the base frame 1, and an adjustment structure 3 provided on the base frame 1; The bonding structure 2 includes a placement frame 204, a sleeve 201 on the placement frame 204, a movable rack 202 movably disposed within the sleeve 201, a patch head 203 on the movable rack 202, a rotating shaft 205 on the placement frame 204, a transmission gear 206 on the rotating shaft 205 and meshing with the movable rack 202, a fixed frame 207 on the placement frame 204, a worm gear 208 movably disposed on the fixed frame 207 and connected to the rotating shaft 205, and a worm 209 movably disposed on the fixed frame 207. 9 meshes with the worm gear 208. The fixing frame 207 is equipped with a first motor 210, and the driving end of the first motor 210 is connected to the worm 209. When it is necessary to attach the conductive layer, the patch head 203 can adsorb the dome switch and drive the first motor 210. The first motor 210 can drive the worm 209 to rotate. Under the action of the worm 209, the worm gear 208 drives the rotating shaft 205 to rotate. The rotating shaft 205 can drive the transmission gear 206 to rotate. The transmission gear 206 can drive the moving rack 202 to move inside the sleeve 201. The moving rack 202 can drive the dome switch to move and attach to the flexible circuit board through the patch head 203.

[0018] Furthermore, the first motor 210 is fixed to the mounting bracket 207 by bolts. This connection scheme strictly follows the modular design principle, which not only ensures the precise concentricity between the motor shaft and the transmission system, effectively avoiding additional loads and vibrations caused by misalignment, but also significantly simplifies the equipment maintenance process. When the motor needs to be repaired or replaced, the operator can easily remove the bolts and take the motor off as a complete module, which greatly improves the efficiency and convenience of equipment maintenance and reduces downtime. This fixing method ensures transmission stability while also taking into account the maintainability of the equipment throughout its entire life cycle. The placement frame 204 is equipped with reinforcing ribs. These reinforcing ribs have undergone rigorous static analysis and topology optimization and are precisely positioned in the key areas where the frame is most stressed, such as the connection between the load-bearing interface and the support wall. This design not only effectively resists structural fatigue deformation that may be caused by cyclic loads, but also significantly improves the overall stiffness and natural frequency of the placement frame 204, thereby suppressing harmful vibrations that may be generated during equipment operation. This design maximizes load-bearing stability and durability while ensuring lightweight structure, and ensures the long-term positioning accuracy of its precision components in dynamic working environments.

[0019] Furthermore, the base frame 1 is equipped with support legs made of high-damping composite material. These legs form a stable, statically determinate support structure through a three- or four-point support layout. This not only effectively lowers the equipment's center of gravity but also significantly improves the coefficient of friction through a bottom anti-slip design. This support scheme effectively absorbs minor vibrations generated during equipment operation, preventing displacement or swaying during operation. It provides crucial mechanical stability for the precision bonding process and effectively isolates the interference of ground unevenness on equipment accuracy. The moving rack 202 is adapted to the sleeve 201. The inner wall of the sleeve 201 is hard anodized and embedded with a self-lubricating bearing, effectively reducing the coefficient of friction while ensuring motion accuracy. This guiding system perfectly constrains the six degrees of freedom of the moving rack 202 during movement, eliminating possible radial movement and swaying, and providing a stable and reliable linear motion trajectory for the patch head 203, thereby ensuring the positioning accuracy and repeatability of the entire bonding process.

[0020] Furthermore, the adjustment structure 3 includes a placement plate 301, which is mounted on the base frame 1. The placement plate 301 has an annular slide rail 302, on which a sliding block 303 is movably mounted. A rotating frame 304 is mounted on the sliding block 303. A support frame 306 is mounted on the placement plate 301, and a clamping device 305 is mounted on the rotating frame 304. A rotating shaft 307 is movably mounted on the support frame 306 and connected to the rotating frame 304. A rotating gear 308 is mounted on the rotating shaft 307. A second motor 309 is mounted on the support frame 306. A rotating gear 310 is mounted on the driving end of the second motor 309 and meshes with the rotating gear 308. A limiting hole 311 is provided on the rotating shaft 305. An electric push rod 312 is mounted on the placement plate 301. The driving end of the electric push rod 312... A limiting rod 313 is provided, and the limiting rod 313 abuts against the limiting hole 311. When it is necessary to fix the flexible circuit board of the mobile phone, the flexible circuit board of the mobile phone is placed on the rotating frame 304, and the clamping device 305 is operated to fix the flexible circuit board on the rotating frame 304. When it is necessary to adjust the angle of the flexible circuit board for better fit, the second motor 309 is driven. The second motor 309 can drive the rotating gear 310 to rotate. Under the action of the rotating gear 310, the rotating gear 308 drives the rotating shaft 307 to rotate. The rotating shaft 307 can drive the rotating frame 304 to rotate on the annular slide rail 302 through the sliding block 303. The rotating frame 304 can drive the flexible circuit board to rotate and adjust the fit position. After the rotating frame 304 is adjusted to the predetermined position, the electric push rod 312 is driven. The electric push rod 312 can drive the limiting rod 313 to move into the limiting hole 311 on the rotating shaft 205, so as to fix and limit the limiting hole 311.

[0021] Furthermore, the sliding block 303 is provided in pairs. The two sets of sliders form a gapless fit with the annular slide rail 302 through a preload adjustment system. This dual-slider layout can effectively constrain the radial degree of freedom and overturning moment of the rotating frame 304. By distributing the rotational load to the two support points through load equalization, when the rotating frame 304 is adjusted at an angle, the dual-slider system can jointly bear the tangential force and bending moment, significantly reducing the probability of wear at a single point, ensuring the positioning accuracy and movement stability of the rotating frame 304 at any angle, and providing a stable platform reference for precision assembly operations. The limiting hole 311 is adapted to the limiting rod 313. The inner wall of the limiting hole 311 is hard anodized and has a guide chamfer. The surface of the limiting rod 313 is processed by ultra-precision grinding. When the limiting rod 313 is inserted into the corresponding hole, its mating surface forms a uniform contact stress distribution, which effectively suppresses radial sway and axial movement. This precision mating mechanism can reliably withstand the dynamic load generated by the rotating frame 304 in the working state. By establishing a stable mechanical stop through multi-point positioning, it ensures that the equipment can maintain the preset working position unchanged under continuous vibration environment.

[0022] Furthermore, the support frame 306 is equipped with reinforcing ribs, which effectively suppresses resonance phenomena that may occur during equipment operation, provides a stable installation reference for precision transmission components, and ensures that the entire system can maintain its original geometric accuracy and positioning accuracy under long-term high-frequency operation. The clamping unit 305 is provided in pairs, and the two clamping units achieve synchronous opposite movement through a linkage mechanism. Each clamping unit is equipped with an adaptive floating joint and a pressure sensor, which can automatically adjust the clamping angle according to the micro-morphology of the circuit board surface and provide real-time feedback of clamping force data. This symmetrically arranged clamping system can form a uniformly distributed clamping force field in the circuit board plane, effectively avoiding substrate deformation caused by single-point stress concentration, and completely suppressing the displacement or vibration that may occur on the circuit board under high-speed rotation conditions, providing a reliable positioning reference for high-precision mounting processes.

[0023] Furthermore, several limiting holes 311 are provided. This series of limiting holes 311 can be quickly inserted and engaged with standardized limiting rods 313 to form a rigid constraint mechanism for multi-point positioning. When the rotating frame 304 is at different working angles, the operator can select the corresponding limiting hole 311 position according to process requirements. Precise angle locking is achieved through the interference fit between the limiting rod 313 and the hole position. This modular limiting scheme not only ensures the positioning reliability of the rotating frame 304 under any working condition, but also realizes the adjustability of the working position, effectively meeting the precise control requirements of diverse production processes for equipment posture. The second motor 309 is fixed to the support frame 306 by bolts. Its mounting surface is precision machined to ensure flatness and perpendicularity. The bolt group is symmetrically arranged according to the principle of uniform load distribution and adopts an anti-loosening design, which can maintain stable connection performance under long-term vibration conditions. This connection method not only ensures the precise alignment between the motor output shaft and the transmission system, but also realizes the modular packaging of the drive unit. When maintenance or performance upgrades are required, technicians can quickly disassemble and replace the entire motor module, significantly reducing equipment downtime and improving the overall utilization rate of the production system.

[0024] Working principle: When it is necessary to fix the flexible circuit board of the mobile phone, the flexible circuit board is placed on the rotating frame 304, and the clamping device 305 is operated to fix the flexible circuit board on the rotating frame 304. When it is necessary to adjust the angle of the flexible circuit board for better fit, the second motor 309 is driven. The second motor 309 can drive the rotating gear 310 to rotate. Under the action of the rotating gear 310, the rotating gear 308 drives the rotating shaft 307 to rotate. The rotating shaft 307 can drive the rotating frame 304 to rotate on the annular slide rail 302 through the sliding block 303. The rotating frame 304 can drive the flexible circuit board to rotate and adjust the fit position. After the rotating frame 304 is adjusted to the predetermined position... The electric push rod 312 drives the limiting rod 313 to move into the limiting hole 311 on the rotating shaft 205, which can fix and limit the limiting hole 311. When it is necessary to attach the conductive layer, the patch head 203 can adsorb the dome switch and drive the first motor 210. The first motor 210 can drive the worm gear 209 to rotate. The worm wheel 208 drives the rotating shaft 205 to rotate under the action of the worm gear 209. The rotating shaft 205 can drive the transmission gear 206 to rotate. The transmission gear 206 can drive the moving rack 202 to move in the sleeve 201. The moving rack 202 can drive the dome switch to move and attach to the flexible circuit board through the patch head 203.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic bonding device for conductive layers of mobile phone buttons, comprising a base frame (1), characterized in that: The base frame (1) is provided with a fitting structure (2) and an adjustment structure (3). The bonding structure (2) includes a placement frame (204), a sleeve (201) on the placement frame (204), a movable rack (202) movably disposed inside the sleeve (201), a patch head (203) on the movable rack (202), a rotating shaft (205) on the placement frame (204), and a transmission gear (206) on the rotating shaft (205) that meshes with the movable rack (202). The placement frame (204) is provided with a fixed frame (207), the fixed frame (207) is movably provided with a worm wheel (208) and the worm wheel (208) is connected to the rotating shaft (205), the fixed frame (207) is movably provided with a worm (209) and the worm (209) meshes with the worm wheel (208), the fixed frame (207) is provided with a first motor (210) and the drive end of the first motor (210) is connected to the worm (209).

2. The automatic bonding device for conductive layers of mobile phone buttons according to claim 1, characterized in that: The first motor (210) is fixed to the fixed frame (207) by bolts, and the placement frame (204) is provided with reinforcing ribs.

3. The automatic bonding device for conductive layers of mobile phone buttons according to claim 1, characterized in that: The base frame (1) is provided with support legs, and the movable rack (202) is adapted to the sleeve (201).

4. The automatic bonding device for conductive layers of mobile phone buttons according to claim 1, characterized in that: The adjustment structure (3) includes a placement plate (301), which is mounted on the base frame (1). The placement plate (301) has an annular slide rail (302), a sliding block (303) is movably mounted on the annular slide rail (302), a rotating frame (304) is mounted on the sliding block (303), a support frame (306) is mounted on the placement plate (301), a clamping device (305) is mounted on the rotating frame (304), and a rotating shaft (307) is movably mounted on the support frame (306). The rotating shaft (307) is connected to the rotating frame (304). 04) Connection: The rotating shaft (307) is provided with a rotating gear (308), the support frame (306) is provided with a second motor (309), the driving end of the second motor (309) is provided with a rotating gear (310) and the rotating gear (310) meshes with the rotating gear (308), the rotating shaft (205) is provided with a limiting hole (311), the placement plate (301) is provided with an electric push rod (312), the driving end of the electric push rod (312) is provided with a limiting rod (313) and the limiting rod (313) abuts against the limiting hole (311).

5. The automatic bonding device for conductive layers of mobile phone buttons according to claim 4, characterized in that: The sliding block (303) is provided in a pair, and the limiting hole (311) is adapted to the limiting rod (313).

6. The automatic bonding device for conductive layers of mobile phone buttons according to claim 4, characterized in that: The support frame (306) is provided with reinforcing ribs, and the clamping device (305) is provided with a pair.

7. The automatic bonding device for conductive layers of mobile phone buttons according to claim 4, characterized in that: The limiting hole (311) is provided in several places, and the second motor (309) is fixed on the support frame (306) by bolts.

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