Case assembly line and wristband assembly bus

Abstract

This invention relates to the field of smart wearable device manufacturing technology, and particularly to a watch case assembly line and a wristband assembly bus. The watch case assembly line includes a base, a first assembly module, a second assembly module, and a conveying module. The first assembly module is located on the base and is configured to assemble a first keycap, a key tube, and a nut of a first button assembly to the watch case. The second assembly module is located on the base and is configured to assemble a second keycap and a locking screw to the watch case. The conveying module is located on the base and is configured to transport the watch case between the first and second assembly modules. The main objective of this invention is to provide a watch case assembly line that automates the assembly of the watch case and buttons, thereby improving product processing efficiency and yield.

Description

Technical Field

[0001] This invention relates to the field of smart wearable device manufacturing technology, and in particular to a watch case assembly line and a wristband device assembly bus. Background Technology

[0002] As a mainstream wearable smart device, the basic structure of a smartwatch typically includes a watch case and buttons. The buttons are integrated into the side of the watch case and are the core component for human-computer interaction. Users can trigger the corresponding function response of the device through different operation methods such as twisting and pressing.

[0003] Specifically, smartwatches often employ differentiated button designs to distinguish their functions: one is a circular first button, and the other is a square second button. Their functions are clearly defined: turning the first button allows for fine-tuning of device parameters, such as adjusting volume, screen brightness, alarm setting time, or adjusting numerical parameters like target pace and distance in sports mode; pressing the second button allows for directional selection and module switching, such as switching options in the menu list, contact interface, or input interface, like selecting a specific contact, adjusting alarm time parameters, and switching between different functional modules such as time display, activity tracking, and heart rate monitoring. Through these differentiated button operations, users can efficiently interact with the smartwatch and access a variety of functions.

[0004] However, in current technologies, the assembly of smartwatch cases and buttons is still primarily done manually. Compared to automated assembly processes, manual assembly not only suffers from low efficiency and difficulty in adapting to large-scale mass production needs, but is also prone to fluctuations in product yield due to human error. This fails to meet the high demands of the smart device manufacturing industry for production efficiency and product quality stability, becoming a key bottleneck restricting capacity and quality improvement. Summary of the Invention

[0005] The main objective of this invention is to provide a watch case assembly line that automates the assembly of the watch case and buttons, thereby improving product processing efficiency and yield.

[0006] To achieve the above objectives, the present invention provides a watch case assembly line configured to respectively install a first button assembly and a second button assembly to the first button hole and the second button hole of the watch case. The watch case has a button bracket on the outer periphery of the second button hole. The first button assembly includes at least a first keycap, a retaining tube, and a nut. The second button assembly includes at least a second keycap and a locking screw. The watch case assembly line includes:

[0007] Base;

[0008] A first assembly module is disposed on the base, and the first assembly module is configured to assemble the first keycap, the bar tube and the nut of the first button assembly to the watch case;

[0009] A second assembly module, disposed on the base, is configured to assemble the second keycap and the locking screw to the watch case; and

[0010] A conveying module is disposed on the base, and the conveying module is configured to convey the watch case between the first assembly module and the second assembly module.

[0011] In one embodiment, the first assembly module includes:

[0012] A first dial adjustment device is configured to pick up the watch case located on the transport module and adjust the watch case to a first assembly posture that exposes the first button hole.

[0013] A bar tube mounting device is configured to pick up the bar tube from the bar tube hopper and insert the bar tube into the first button hole of the dial housing on the first dial adjustment device in a predetermined posture.

[0014] A first keycap mounting device is configured to pick up a first keycap from a keycap magazine and insert the first keycap into the first keyhole of the watch case in a predetermined orientation, where the watch case is in a first assembled orientation; and

[0015] A nut mounting device is configured to pick up the nut from a nut hopper and drive the nut to be fastened to the first keycap in a predetermined posture.

[0016] In one embodiment, the first assembly module further includes a screw locking device configured to pick up a screw from a screw hopper and lock the screw between the bar tube and the watch case to secure the bar tube to the watch case.

[0017] In one embodiment, the watch case located in the conveying module is in a first horizontal transport posture; the first assembly posture is a first vertical assembly posture;

[0018] The first dial adjustment device includes a rotating clamping mechanism, which includes a turntable and a jaw structure disposed on the turntable. The jaw structure is configured to grip the watch case, and the turntable is configured to drive the jaw structure to rotate along the axial direction of the dial, so that the dial is in the first vertical assembly posture with the first button hole facing upward; a guide groove configured to accommodate the nut is opened on the side of the dial where the jaw is disposed.

[0019] The nut installation device includes a nut feeding mechanism and a pushing mechanism. The nut feeding mechanism is configured to pick up the nut from the nut hopper and place it into the guide groove. The pushing mechanism is located in the guide groove and is configured to push the nut along the guide groove to assemble with the first keycap.

[0020] In one embodiment, the second assembly module includes a keycap loading sub-module and a screw loading sub-module, the keycap loading sub-module being connected to the screw loading sub-module, and the conveying module being further configured to convey the watch case from the keycap loading sub-module to the screw loading sub-module;

[0021] The keycap loading module includes a second dial adjustment device and a keycap lowering mechanism, and the screw loading module includes a third dial adjustment device, a case fixing fixture, and a screw loading mechanism.

[0022] The second dial adjustment device is configured to pick up the watch case located on the conveying module and adjust the watch case to a second vertical assembly posture that exposes the second key hole, so that the second key hole of the watch case is directly opposite the lifting end of the keycap lowering mechanism. The keycap lowering mechanism is configured to drive the second keycap located at the lifting end to be assembled to the second key hole of the watch case. The third dial adjustment device is configured to pick up the watch case located on the conveying module and convey it to the watch case fixing fixture. The watch case fixing fixture is configured to switch the watch case to a screw loading posture. The screw loading mechanism is configured to assemble the screw to the key bracket for assembly with the second keycap.

[0023] In one embodiment, the casing located in the conveying module is in a first horizontal transport posture;

[0024] The second dial adjustment device includes a first flipping part and a rotating part, the rotating part being fixedly disposed on the first flipping part; the first flipping part is configured to flip the watch case so that the watch case switches from the first horizontal transport posture to the second vertical assembly posture, and the rotating part is configured to pick up and rotate the watch case so that in the second vertical assembly posture, the insertion port of the second key hole is directly opposite the keycap lowering mechanism.

[0025] In one embodiment, the second dial adjustment device further includes a keycap abutment portion, which is fixedly disposed on the flip portion and / or the rotating portion;

[0026] The keycap abutment portion is configured to abut against and limit the second keycap of the watch case.

[0027] In one embodiment, the casing located in the conveying module is in a first horizontal transport posture;

[0028] The third dial adjustment device includes a second flipping part and a locking part, the locking part being disposed in the second flipping part; the second flipping part is configured to flip the watch case so that the watch case switches from the first horizontal transport posture to the third vertical assembly posture, the locking part having at least two locking members that can approach and move away from each other, each locking member being configured to abut against the inner circumferential surface of the watch case and offset the second keycap and key support.

[0029] In one embodiment, the watch case fixing fixture includes a watch case support and a watch case locking part, wherein the watch case locking assembly is disposed on the watch case support; the watch case locking part has at least two locking members that can move closer to and further away from each other, each of the locking members being configured to abut against and limit the watch case and offset the second keycap and the key support; the watch case locking assembly is configured to switch the watch case from the third vertical assembly posture to the screw loading posture; and / or

[0030] The screw feeding sub-module is provided with a case picking station and a case locking station. The third dial adjustment device is set corresponding to the case picking station, and the screw feeding mechanism is set corresponding to the case locking station. The screw feeding sub-module has a case docking state. In the case docking state, the locking part is directly opposite the locking surface of the case support.

[0031] The present invention also provides a wristband device assembly bus, the wristband device assembly bus including the watch case assembly line as described above.

[0032] In this technical solution, the watch case assembly line achieves full automation of the assembly of the watch case and button components through a base-integrated first assembly module, second assembly module, and conveying module. Specifically, the first and second assembly modules precisely handle the assembly of the first button (containing a first keycap, a reinforcing tube, and a nut) with the first button hole in the watch case, and the second button (containing a second keycap and a screw) with the second button hole and button bracket in the watch case. This avoids problems such as assembly position deviation and uneven force that easily occur during manual operation, effectively reducing product defects caused by human error and thus improving the product yield rate. This solves the bottleneck of yield rate fluctuation in manual assembly in the prior art. Simultaneously, the conveying module automatically transports the watch case between the first and second assembly modules without manual handling or workstation switching. Furthermore, the operating efficiency of each assembly module is far higher than that of manual assembly, enabling continuous and large-scale assembly operations. This significantly improves the overall product processing efficiency, meets the needs of large-scale mass production of smartwatches, and overcomes the shortcomings of low efficiency and difficulty in adapting to mass production in the prior art. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 A module layout diagram of an embodiment of the watch case assembly line 100 provided by the present invention;

[0035] Figure 2 A structural layout diagram of an embodiment of the bar pipe installation device provided by the present invention;

[0036] Figure 3 A schematic diagram of an embodiment of the first dial adjustment device provided by the present invention;

[0037] Figure 4 A schematic diagram of another embodiment of the first dial adjustment device provided by the present invention;

[0038] Figure 5 A schematic diagram of the structure of an embodiment of the turntable provided by the present invention;

[0039] Figure 6 This is a structural layout diagram of an embodiment of the keycap loading module provided by the present invention;

[0040] Figure 7 A structural layout diagram of an embodiment of the screw loading module provided by the present invention;

[0041] Figure 8 A structural layout diagram of an embodiment of the second dial adjustment device provided by the present invention;

[0042] Figure 9 A schematic diagram of an embodiment of the keycap lowering mechanism provided by the present invention;

[0043] Figure 10 A schematic diagram of an embodiment of the third dial adjustment device provided by the present invention;

[0044] Figure 11 This is a schematic diagram of an embodiment of the screw feeding mechanism provided by the present invention.

[0045] Explanation of icon numbers:

[0046] 100. Watch case assembly line; 10. Base; 11. First assembly module; 111. First dial adjustment device; 1111. Flipping mechanism; 1112. Rotary clamping mechanism; 1113. First rotating shaft; 1114. Fixed bracket; 1115. Turntable; 1116. Guide groove; 112. Pushing mechanism; 113. Bar tube mounting device; 1131. Vacuum nozzle; 12. Keycap loading module; 121. Second dial adjustment device; 1211. First flipping mechanism. 1212, Rotating part; 1213, Second rotating shaft; 1214, First fixing part; 122, Keycap lowering mechanism; 13, Screw feeding sub-module; 131, Third dial adjustment device; 1311, Second flipping part; 1312, Locking part; 1313, Third rotating shaft; 1314, Second fixing part; 132, Case fixing fixture; 133, Screw feeding mechanism; 14, Conveying module; 15, Feeding module; 16, Unloading module; 200, Second keycap.

[0047] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0049] It should be noted that in the embodiments of the present invention, all directional indicators (such as up, down, left, right, front, back, etc.) are only configured to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0050] Furthermore, the descriptions involving "first," "second," etc., in this invention are configured for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0051] To achieve the above objectives, please refer to Figure 1 This invention discloses a watch case assembly line 100, configured to install a first button assembly and a second button assembly to the first button hole and the second button hole of the watch case, respectively. The watch case has a button bracket on the outer periphery of the second button hole. The first button assembly includes at least a first keycap, a retaining tube, and a nut. The second button assembly includes at least a second keycap 200 and a locking screw. The watch case assembly line 100 includes:

[0052] Base 10;

[0053] The first assembly module 11 is disposed on the base 10. The first assembly module 11 is configured to assemble the first keycap, bar tube and nut of the first button assembly to the watch case.

[0054] A second assembly module, located on the base 10, is configured to assemble the second keycap 200 and locking screws to the watch case; and

[0055] A conveying module 14 is provided on the base 10 and is configured to convey the watch case between the first assembly module 11 and the second assembly module.

[0056] It is understood that the watch case assembly line 100 has a basic feeding module 15 and a discharging module 16. The feeding module 15 provides watch cases that have not yet been assembled with the button bracket or provide watch cases that have been pre-assembled with the button bracket. The discharging module 16 is configured to store or transfer watch cases that have been assembled with the buttons. Between the feeding module 15 and the discharging module 16, there is a first assembly module 11 and a second assembly module. The watch case assembly line 100 can be an assembly process from the feeding module 15 to the first assembly module 11 to the second assembly module, or it can be an assembly process from the feeding module 15 to the second assembly module to the first assembly module 11. This is not limited in this invention. Alternatively, the feeding module 15 feeds the first assembly module 11 and the second assembly module respectively.

[0057] It needs to be explained that when the feeding module 15 provides a watch case that has not yet been assembled with the button bracket, the watch case assembly line 100 can first complete the assembly of the first button, and then manually assemble the button bracket. The watch case is then conveyed into the second assembly module via the conveying module 14 for the assembly of the second button. When the feeding module 15 provides a watch case pre-installed with the button bracket, the assembly of the second button can be completed first, and the watch case is then conveyed into the first assembly module 11 via the conveying module 14 for the assembly of the first button.

[0058] Specifically, the base 10 refers to the rigid frame structure that supports each functional module. It can be implemented using a welded steel structure or a CNC-machined aluminum profile frame, providing a stable installation reference for the assembly modules. The first assembly module 11 refers to a dedicated workstation for assembling the first button. It can be implemented using a multi-axis robotic arm in conjunction with a vision positioning system to ensure the coaxiality of the first keycap and the mounting hole. The second assembly module refers to a dedicated workstation for assembling the second button. It can be implemented using a servo pressing mechanism in conjunction with a spring preload device to precisely control the spring compression stroke. The conveying module 14 refers to the material conveying system. It can be implemented using one or more conveying devices such as a belt conveyor, a shuttle cart, or guide rail 142, or a combination of multiple conveying devices; no specific limitations are specified here.

[0059] The conveying module 14 is distributed on the base 10 and has two core functions: the first core function is to realize the flow of the watch case between different modules, such as between the first assembly module 11 and the second assembly module, and between the feeding module 15 and the first assembly module 11; the second core function is to realize the flow of the watch case to different workstations in any module. For example, in the first assembly module 11, the first assembly module 11 has at least a watch case picking workstation, a button lifting workstation, and a snap ring pushing workstation. First, the watch case is transferred from the previous module to the watch case picking workstation of the first assembly module 11 under the action of the conveying module 14. At the watch case picking workstation, the watch case can be removed and fixed by a robotic arm, a second dial adjustment device 121, etc. Then, under the sliding of the mover of the guide rail 142, it enters the button lifting workstation, where the first keycap is inserted. In summary, the conveyor modules 14 distributed in more than 10 positions on the base serve to connect the assembly actions of the watch case assembly line 100 in series, so that the assembly actions are no longer independent and the assembly between the watch case and the buttons is completed in an orderly manner.

[0060] In this technical solution, the watch case assembly line 100, through the first assembly module 11, the second assembly module, and the conveying module 14 integrated in the base 10, achieves fully automated assembly of the watch case and button components. Specifically, the first and second assembly modules respectively perform precise operations for assembling the first button (containing a first keycap, a reinforcing tube, and a nut) with the first button hole in the watch case, and the second button (containing a second keycap 200 and a screw) with the second button hole and button bracket in the watch case. This avoids problems such as assembly position deviation and uneven force that easily occur during manual operation, effectively reducing product defects caused by human error, thereby improving the product yield rate and solving the bottleneck of yield rate fluctuation in manual assembly in the prior art. Simultaneously, the conveying module 14 can automatically transport the watch case between the first assembly module 11 and the second assembly module without manual handling or workstation switching. Furthermore, the operating efficiency of each assembly module is far higher than that of manual assembly, enabling continuous and large-scale assembly operations, significantly improving overall product processing efficiency, meeting the needs of large-scale mass production of smartwatches, and overcoming the shortcomings of low efficiency and difficulty in adapting to mass production in the prior art.

[0061] Please see Figures 2 to 4 In one embodiment, the first assembly module 11 includes:

[0062] First dial adjustment device 111 is configured to pick up the watch case located on the conveyor module 14 and adjust the watch case to a first assembly posture with the first button hole exposed.

[0063] The bar tube mounting device 113 is configured to pick up the bar tube in the bar tube hopper and insert the bar tube into the first button hole on the upper case of the first dial adjustment device 111 in a predetermined posture.

[0064] A first keycap mounting device is configured to pick up a first keycap from a keycap magazine and insert the first keycap into a first keyhole of a watch case in a predetermined orientation; and

[0065] A nut mounting device is configured to pick up nuts from a nut hopper and fasten the nuts to a first keycap in a predetermined posture.

[0066] It should be noted that the first dial adjustment device 111 can be a multi-axis robotic arm with vision positioning. The pneumatic gripper at the end of the robotic arm (with silicone anti-slip pads and automatic spacing adjustment) positions the dial case using dual industrial cameras, grips it, and rotates it until the first button hole is exposed. Alternatively, the first dial adjustment can also be a pneumatic rotary table with positioning pins. After the dial case arrives at the workstation, the lifting platform lifts the dial case, the elastic positioning pins fix it, and the electric rotary table drives the dial case to rotate. It stops when the laser sensor detects the first button hole. This is suitable for the large-scale production of standardized round dial cases, with fast adjustment and low maintenance costs.

[0067] The first keycap installation device can be a combination of vacuum adsorption and servo press-fitting. That is, the servo electric cylinder's end suction cup adsorbs the first keycap, and the pre-installed sleeve below supports the spring. After the electric cylinder drives the keycap to install the spring, it is inserted into the keyhole of the watch case with a set pressure. Alternatively, the first keycap installation device can also be a combination of pneumatic grippers and guide sleeves. The finger cylinder grippers hold the keycap, the guide sleeve first connects to the spring, then covers the keyhole of the watch case for positioning, and finally the pneumatic slide pushes the first keycap into the first keyhole of the watch case.

[0068] Nut mounting devices typically include a keycap pickup component, a gripper / suction cup adapted to the shape of the first keycap, and a lifting drive component; they can pick up the first keycap from the keycap hopper and drive the first keycap to be inserted into the first keyhole with the pre-installed bar tube in a predetermined posture (such as the buckle aligning with the slot in the watch case), thus achieving the initial positioning of the first keycap.

[0069] The bar tube installation device 113 mainly includes a bar tube pickup component, an attitude calibration component, and a positioning and moving component. The bar tube pickup component can use a pneumatic gripper (the gripper opening can be adjusted according to the outer diameter of the bar tube, and the silicone pad increases friction and prevents scratches) or a vacuum nozzle 1131 adapted to the inner diameter of the bar tube (adsorbing the inner wall of the bar tube through negative pressure to avoid damaging the outer wall). The attitude calibration component is configured to adjust the picked-up bar tube to a "predetermined attitude" (i.e., the bar tube axis is coaxial with the axis of the first button hole of the watch case to ensure no offset during insertion). It is usually composed of a "visual positioning module + rotary drive component". The visual positioning module (such as an industrial camera + image recognition algorithm) is installed next to the pickup component and can identify the features at both ends of the bar tube (such as the chamfer and positioning hole at the end of the bar tube) to determine the deviation between the current attitude and the predetermined attitude. The rotary drive component (such as a micro servo motor) is linked with the pickup component and can drive the bar tube to rotate around its own axis. The angle is adjusted according to the visual positioning result until the bar tube attitude meets the predetermined requirements. The positioning and moving component, as the "moving carrier" of the device, is configured to drive the picking component and the calibrated bar tube to move precisely to the first button hole of the watch case and complete the insertion. Structurally, it adopts a "multi-axis linear slide" (such as an XY axis slide to control horizontal movement and a Z axis slide to control vertical insertion depth). The slide drive is a servo motor. The slide is fixedly connected to the base 10, and the movement path is preset as "from the bar tube hopper to the material picking position → the attitude calibration position → the first button hole insertion position of the watch case", which requires no manual intervention throughout the process.

[0070] In this embodiment, the first dial adjustment device 111 picks up the watch case from the conveying module 14, flips and adjusts it to the first assembly posture, exposing the first button hole and aligning it with the bar tube mounting device 113. Then, the bar tube mounting device 113 picks up the bar tube from the hopper and inserts it into the first button hole of the watch case in a predetermined posture. Next, the first keycap mounting device picks up the first keycap and drives it to insert into the first button hole with the bar tube installed, completing the initial assembly. Finally, the nut mounting device picks up the nut, aligns it with the threaded hole of the first keycap, and tightens the nut and keycap with a set torque. After assembly, the watch case is transferred from the conveying module 14 to the next stage.

[0071] It should be noted that a hexagonal nut can be used. Since the nut needs to be locked to the first keycap, at least one of the pickup components in the nut mounting device and the first keycap mounting device must have a rotation function.

[0072] Please see Figure 3 and Figure 4In one embodiment, the first dial adjustment device 111 includes a flipping mechanism 1111 and a rotating clamping mechanism 1112 disposed on the flipping mechanism 1111. The flipping mechanism 1111 is disposed on the base 10 and can switch between a picking posture and an installation posture. The rotating clamping mechanism 1112 is configured to pick up the watch case located on the conveying module 14 and drive the watch case to rotate circumferentially thereafter. When the flipping mechanism 1111 is in the installation posture, the rotating clamping mechanism 1112 can drive the dial to rotate to a first vertical assembly posture so that the first button hole is facing downward.

[0073] It should be noted that the structure of the flipping mechanism 1111 can be a fixed bracket 1114, a first rotating shaft 1113, and a drive assembly. Specifically, the fixed bracket 1114 is rigidly connected to the base 10 via bolts to ensure stable operation. The first rotating shaft 1113 is horizontally inserted through the top of the fixed bracket 1114, with its end connected to a drive assembly (such as a servo motor + gearbox or a pneumatic motor) to provide power for the flipping. The middle of the first rotating shaft 1113 is fixedly connected to the mounting seat of the rotary clamping mechanism 1112, enabling the transmission of the flipping action to the clamping mechanism. Simultaneously, when the flipping mechanism 1111 is in the picking posture, the clamping end of the rotary clamping mechanism 1112 is flush with the watch case transport surface of the conveying module 14, facilitating horizontal picking of the watch case. In the installation posture, the first rotating shaft 1113 drives the rotary clamping mechanism 1112 to flip, changing the clamped watch case from a horizontal to a vertical state. Furthermore, the flipping stroke can be precisely controlled by limit sensors (such as photoelectric limiters or mechanical limiters) to prevent over-flipping or under-flipping.

[0074] The rotary clamping mechanism 1112 is typically mounted on the first rotating shaft 1113 of the flipping mechanism 1111, and consists of a clamping assembly and a rotary drive. The clamping assembly can use pneumatic grippers (equipped with silicone anti-slip pads to prevent damage to the watch case), and the gripper opening can be adjusted according to the watch case size via cylinder stroke. The rotary drive, such as a stepper motor, is embedded in the mounting base of the clamping assembly, and its output shaft is connected to the gripper seat of the clamping assembly, which can drive the grippers and the clamped watch case to rotate circumferentially. In the working chamber, in the picking posture, the grippers close to pick up the horizontal watch case on the conveying module 14; after the flipping mechanism 1111 switches to the mounting posture, the rotary drive drives the watch case to rotate circumferentially, and through visual positioning or mechanical positioning, the first button hole is precisely facing downwards, completing the adjustment of the vertical assembly posture.

[0075] In one embodiment, the first assembly module 11 further includes a screw locking device configured to pick up screws from a screw hopper and lock them between the bar tube and the watch case to secure the bar tube to the watch case.

[0076] It should be noted that the screw locking device typically includes a screw picking component (such as a magnetic bit / adsorption gripper, adapted to the shape of the screw head to prevent the material from falling out), a positioning and moving component (such as a multi-axis robot, mounted on the base 10), and a locking drive component (such as a servo electric screwdriver with integrated torque control function). The screw can be picked up from the screw hopper, and the positioning and moving component drives the screw to align with the connection hole between the bar tube and the watch case (after the bar tube is inserted, its side wall has a pre-set threaded hole or through hole at the corresponding position of the watch case). Then, the locking drive component drives the bit to rotate, locking the screw between the bar tube and the watch case according to the set torque, thus fixing the bar tube.

[0077] In this embodiment, the screw locking device picks up the screw and positions it at the connection hole between the bar tube and the watch case, thus fixing the bar tube to the watch case and preventing the bar tube from shifting during subsequent assembly.

[0078] In one embodiment, the first assembly module 11 further includes a welding device configured to weld a screw to a bar; and / or, the welding device is configured to weld a nut to a first keycap.

[0079] It should be noted that the welding device typically includes a welding head (such as a laser welding head / resistance welding head, adapted for welding micro-components, avoiding high-temperature damage to the watch case), a positioning and adjustment assembly (such as a three-axis fine-tuning slide, mounted on the base 10), and a temperature / power control module. When welding the screw to the bar, the positioning and adjustment assembly moves the welding head to align with the connection gap between the screw and the bar, and welds them together at the set temperature to strengthen the fixation. When welding the nut to the first keycap, the positioning and adjustment assembly moves the welding head to align with the contact edge between the nut and the keycap, and welds them together using low-power welding (to avoid melting and deformation), preventing the nut from loosening. During the welding process, the control module monitors the temperature in real time to prevent overheating and damage to surrounding components.

[0080] Thus, through the automated process of "posture adjustment → bar tube insertion → screw fixing + welding → keycap installation → nut tightening + welding", the efficiency of mechanical fixing is retained, and "double reinforcement" is achieved through welding. The welding parameters are controllable, which can avoid the quality fluctuations of manual welding and fully meet the mass production requirements of high precision and high reliability watches.

[0081] Please see Figure 5 In one embodiment, the watch case located in the conveying module 14 is in a first horizontal transport posture; the first assembly posture is a first vertical assembly posture.

[0082] The first dial adjustment device 111 includes a rotating clamping mechanism 1112, which includes a turntable 1115 and a jaw structure disposed on the turntable 1115. The jaw structure is configured to grip the watch case, and the turntable 1115 is configured to drive the jaw structure to rotate along the axis of the dial so that the dial is in a first vertical assembly posture with the first button hole facing upward. A guide groove 1116 configured to accommodate a nut is provided on the side of the dial where the jaw is disposed.

[0083] The nut installation device includes a nut feeding mechanism and a pushing mechanism 112. The nut feeding mechanism is configured to pick up nuts from the nut hopper and push them into the guide groove 1116. The pushing mechanism 112 is located in the guide groove 1116 and is configured to push the nuts along the guide groove 1116 to assemble with the first keycap.

[0084] It should be noted that the shape of the guide groove 1116 matches the shape of the nut (fitting a hexagonal nut), that is, the inner wall is a hexagonal structure that fits the outer contour of the hexagonal nut (or is slightly larger than the nut's shape to ensure that the nut can slide smoothly without wobbling), the groove depth is slightly greater than the nut's thickness (so that the nut is fully embedded in the groove to prevent it from falling off when sliding), and the groove length needs to cover the distance from the "nut placement position" to the "assembly position with the first keycap" (to ensure that the nut can be pushed to the assembly point by the push mechanism 112), and to ensure that the nut can accurately align with the keycap after being pushed out of the groove.

[0085] The pushing mechanism 112 includes a drive component, a push rod, and a limiting assembly. The drive component can be a miniature cylinder, an electric push rod, or a linear motor. One end of the push rod is fixed to the output end of the drive component, and the other end can extend into the guide groove 1116. The limiting assembly is installed at the end of the guide groove 1116 or on the push rod's travel path and is configured to control the push rod's pushing distance to prevent over-pushing or under-pushing. The design must ensure that the push rod can smoothly extend into the groove to push the nut without interfering with the gripper structure, the case, or other components.

[0086] In this application, the guide groove 1116 serves as a temporary receiving space for the nut. After the nut feeding mechanism picks up the nut, it can be directly placed into the groove. The constraint of the groove prevents the nut from shifting or falling before assembly, replacing manual hand positioning and automating the pre-positioning of the nut. When the pushing mechanism 112 pushes the nut, the guide groove 1116 provides a fixed sliding path for the nut, preventing the nut from tilting during the pushing process (especially for hexagonal nuts, to prevent them from shifting due to uneven force on the corners), ensuring that the nut moves accurately along the preset direction to align with the first keycap, solving the problem of uncontrollable nut pushing path by manual pushing. In addition, since the guide groove 1116 rotates synchronously with the turntable 1115 (because it is located on the turntable 1115), when the turntable 1115 drives the watch case to the first vertical assembly posture, the guide groove 1116 is also adjusted to the position that matches the first keycap, without the need for additional adjustment of the groove direction, realizing the synchronous connection of "watch case posture adjustment - nut path guidance" and simplifying the device structure.

[0087] Please see Figure 6 and Figure 8 In one embodiment, the second assembly module includes a keycap loading sub-module 12 and a screw loading sub-module 13, the keycap loading sub-module 12 being connected to the screw loading sub-module 13, and the conveying module 14 being configured to convey the watch case from the keycap loading sub-module 12 to the screw loading sub-module 13.

[0088] The keycap loading module 12 includes a second dial adjustment device 121 and a keycap lowering mechanism 122, and the screw loading module 13 includes a third dial adjustment device 131, a case fixing fixture 132 and a screw loading mechanism 133.

[0089] The second dial adjustment device 121 is configured to pick up the watch case located on the conveying module 14 and adjust the watch case to a second vertical assembly posture with the second key hole exposed, so that the second key hole of the watch case is aligned with the lifting end of the keycap lowering mechanism 122. The keycap lowering mechanism 122 is configured to drive the second keycap 200 located at the lifting end to be assembled to the second key hole of the watch case. The third dial adjustment device 131 is configured to pick up the watch case located on the conveying module 14 and convey it to the watch case fixing fixture 132. The watch case fixing fixture 132 is configured to switch the watch case to a screw feeding posture. The screw feeding mechanism 133 is configured to assemble the screw to the key bracket for assembly with the second keycap 200.

[0090] In this embodiment, the second dial adjustment device 121 is the core component for achieving precise adjustment of the watch case posture, and can be composed of multi-stage rotating joints and a clamping mechanism. Its core function is to receive the watch case transferred by the conveying module 14, and adjust the watch case posture through mechanical action so that the second button hole of the watch case is aligned with the lifting end of the keycap lowering mechanism 122. The multi-stage rotating joints are driven by servo motors, which can realize the flipping and fine-tuning rotation of the watch case, ensuring that the coaxiality error between the second button hole and the positioning structure of the keycap lowering mechanism 122 is within an acceptable error range; the clamping mechanism fixes the watch case with a constant clamping force, which not only prevents the watch case from falling off, but also avoids damaging the surface coating or structure of the watch case, and maintains the stability of the watch case posture until the keycap insertion process is completed.

[0091] Please see Figure 9The keycap lowering mechanism 122 is responsible for smoothly embedding the second keycap 200 into the second key hole of the watch case. It can be composed of lowering drive components such as servo cylinders and linear motors, guide components such as linear slide rails and sliders, and keycap positioning fixtures. The keycap positioning fixture fixes the second keycap 200 through contoured grooves and vacuum adsorption to prevent the keycap from shifting or falling off; the guide components ensure the straightness of the fixture during the lifting process to avoid the keycap tilting when inserted; the servo cylinder can precisely control the lowering speed and thrust, which can ensure that the keycap is completely inserted into the hole, while preventing excessive torque from deforming the keycap or watch case. After insertion, the fixture releases the vacuum and resets, waiting for the next operation.

[0092] Please see Figure 7 and Figure 10 The third dial adjustment device 131 undertakes the dual tasks of case transfer and initial posture adjustment. Structurally, it continues the design of multi-stage rotating joints and clamping mechanisms, but its function focuses more on "connectivity" and "adaptability". Its core function is to receive the case with the second keycap 200 embedded in it from the conveying module 14, quickly grab it, and drive the case to complete a second flip, so that the screw holes of the keycap bracket are aligned with the direction of the electric screwdriver bit of the screw feeding mechanism 133. This provides a precise torque transmission path for subsequent screw tightening, while ensuring that the case posture does not shift during the transfer process and avoiding screw hole misalignment.

[0093] The case fixing fixture 132 is crucial for ensuring the stability of the case during screw tightening. Designed to meet the "torque resistance" requirement, it features multi-point clamping and precise positioning. When the third dial adjustment device 131 places the case into the fixture, the fixture applies clamping force through multiple movable jaws and barbs to counteract the counter-torque during screw tightening and prevent the case from rotating with the screwdriver.

[0094] Please see Figure 11 The screw feeding mechanism 133 is responsible for the screening, feeding, and precise locking of screws. It can consist of screws, a feeding tube, and an electric screwdriver. Defective screws are screened by vibration, and qualified screws are sorted with their heads facing forward and blown to the screwdriver bit through the feeding tube. The electric screwdriver uses magnetic attraction to fix the screw, moves it to the front of the screw hole, and then advances it axially. When the tightening action begins, a torque sensor monitors the torque in real time. Once the set value is reached, it automatically stops and rotates in the opposite direction for a preset number of turns. If the torque is abnormal, an alarm is triggered to ensure the quality of screw locking.

[0095] After the watch case enters the second assembly module, the second dial adjustment device 121 of the keycap loading module 12 first picks up the watch case from the conveying module 14. By adjusting its posture, the second keyhole is aligned with the lifting end of the keycap lowering mechanism 122. Then, the positioning fixture of the keycap lowering mechanism 122 descends smoothly along the guide assembly under the drive of the servo cylinder, embedding the second keycap 200 into the second keyhole at a set speed and thrust. After the keycap is embedded, the watch case is transferred to the screw loading module 13 via the conveying module 14. The third dial adjustment device 131 quickly picks up the watch case and flips it over. The screw is placed into the watch case fixing fixture 132 in the appropriate position for screw feeding. The fixture fixes the watch case with multi-point clamping and positioning pins. Then, the screw feeding mechanism 133 selects and feeds the screws to the electric screwdriver bit. After the bit picks up the screw, it aligns with the screw hole and starts the tightening action. The torque sensor monitors and ensures the locking quality. After the screw assembly is completed, the watch case fixing fixture 132 releases the clamps, and the third dial adjustment device 131 sends the watch case back to the conveying module 14 for transfer to the next stage. The entire process achieves automated and high-precision assembly of the second button through the precise cooperation of each mechanism.

[0096] See Figure 8 In one embodiment, the watch case located in the conveying module 14 is in a first horizontal transport posture; the second dial adjustment device 121 includes a first flipping part 1211 and a rotating part 1212, the rotating part 1212 being fixedly disposed on the first flipping part 1211; the first flipping part 1211 is configured to flip the watch case so that the watch case switches from the first horizontal transport posture to the second vertical assembly posture, and the rotating part 1212 is configured to pick up and rotate the watch case so that in the second vertical assembly posture, the insertion port of the second key hole is directly opposite the keycap lowering mechanism 122.

[0097] In this embodiment, the second dial adjustment device 121 includes a first fixing part 1214, a second rotating shaft 1213, a first flipping part 1211, a rotating part 1212, and a driving member. The first fixing part 1214 is disposed on the base 10, and the first fixing part 1214 and the first flipping part 1211 are rotatably connected through the second rotating shaft 1213, so that the first flipping part 1211 can switch the watch case from a first horizontal transport posture to a second vertical assembly posture. At this time, the axis of the second button hole of the watch case changes from a parallel relationship to an intersecting relationship with the surface of the base 10. Then, the rotating part 1212 drives the watch case to rotate at a preset angle or the rotation angle is fed back by the positioning camera, so that the insertion port of the second button hole is aligned with the second keycap 200, thereby realizing the assembly of the keycap and the dial.

[0098] In one embodiment, the rotating part 1212 has two components that can move closer to each other and rotate further apart, providing a fixed base for other parts of the mechanism, and can also be fixedly connected to the conveying module 14, thereby realizing the transfer of the watch case between different workstations. Specifically, the first fixing part 1214 can be assembled from multiple sheet metal parts, or it can be a single component, which can be connected to different structures by opening slots, holes, protrusions, etc. The first fixing part 1214 is provided with a shaft hole, and the second rotating shaft 1213 is inserted into the shaft hole of the fixing part. The first flipping part 1211 is connected to the second rotating shaft 1213. When the driving component is running, the second rotating shaft 1213 drives the first flipping part 1211 to flip, so that the watch case is separated from the clamping arm. The two clamping arms are simultaneously inserted into the watch case. The hollow area of ​​the case then mates with the inner peripheral wall of the case, thereby fixing the rotating part 1212 to the case. Alternatively, the rotating part 1212 is designed to fit the specific shape and size of the case so that the rotating part 1212 can extend into the hollow area of ​​the case and mate with the inner peripheral wall of the case, thereby fixing the rotating part 1212 to the case. Alternatively, for the convenience of inserting the second keycap 200, the clamping arm of the rotating part 1212 is configured as the outer peripheral surface of the case, thereby avoiding structural interference when the second keycap 200 is inserted. The rotating part 1212 can rotate under the drive of the rotating motor, thereby realizing the alignment of the second keyhole of the case with the keycap lowering mechanism 122 of the second assembly unit in the second vertical assembly.

[0099] It is understood that the first horizontal transport posture proposed in this invention refers to the posture in which the axis of the first button hole or the second button hole of the watch case is parallel to the surface of the base 10. The first horizontal transport posture can be the front of the watch case facing the surface of the base 10, or it can be the back of the watch case facing the surface of the base 10. The first vertical assembly posture and the second vertical assembly posture refer to the posture in which the axis of the first button hole or the second button hole of the watch case intersects with the surface of the base 10. When it is necessary to assemble the button, the rotation of the rotating part 1212 makes the axis of the first button hole or the second button hole perpendicular to the surface of the base 10 or form a specific angle with the surface of the base 10 so that the first keycap or the second keycap 200 can be inserted.

[0100] Please continue reading. Figure 8 In one embodiment, the second dial adjustment device 121 further includes a keycap abutment portion, which is fixedly disposed on the flip portion and / or the rotating portion 1212;

[0101] The keycap abutment is configured to abut against the second keycap 200 of the limiting shell.

[0102] In this embodiment, the keycap abutment protrudes from the surface of the first flipping part 1211 and / or the rotating part 1212. When the rotating part 1212 clamps the watch case, the keycap abutment can abut against the second keycap 200 that limits the movement of the watch case. This is because when the watch case needs to move from the keycap loading subunit to the screw loading subunit, in order to facilitate the stable movement of the watch case, the watch case needs to move in a first horizontal transport posture. However, the second keycap 200 on the watch case and the key support are not yet locked by screws, and the watch case is in a second vertical assembly posture. Therefore, the watch case needs to switch from the second vertical posture to the first horizontal transport posture. That is, when the first flipping part 1211 rotates, the second keycap 200 is prone to shifting or falling off due to gravity or centrifugal force during the flipping process. Therefore, by setting the keycap abutment, the posture of the second keycap 200 on the watch case can be constrained at all times, and the position of the second keycap 200 relative to the key support can be avoided during the flipping process of the watch case. It can be understood that the keycap abutment can be a convex structure, which limits the second keycap 200 through multi-point contact, or it can be multiple L-shaped limiting blocks, so that part of the structure of the second keycap 200 is inserted into the keycap abutment. The shape of the keycap abutment is not limited.

[0103] Please see Figure 10 In one embodiment, the watch case located in the conveying module 14 is in a first horizontal transport posture; the third dial adjustment device 131 includes a second flipping part 1311 and a locking part 1312, with the locking part 1312 disposed in the second flipping part 1311;

[0104] The second flipping part 1311 is configured to flip the watch case so that the watch case switches from a first horizontal transport posture to a third vertical assembly posture. The locking part 1312 has at least two locking members that can approach and move away from each other. Each locking member is configured to abut against the inner circumferential surface of the watch case and offset the second keycap 200 and the key support.

[0105] In this embodiment, the third dial adjustment device 131 includes a second fixing part 1314, a third rotating shaft 1313, a second flipping part 1311, a locking part 1312, and a driving component. The second fixing part 1314 provides a fixed foundation for other components of the third dial adjustment device 131 and can also fix and connect the conveying module 14, thereby realizing the transfer of the watch case between different workstations. Specifically, the second fixing part 1314 can be assembled from multiple sheet metal parts or be a separate component, which can be connected to different structures by opening slots, holes, protrusions, etc. The second fixing part 1314 is provided with a shaft hole, and the third rotating shaft 1313 is inserted into the shaft hole of the second fixing part 1314. The locking part 1312 is connected to the third rotating shaft 1313. When the driving component is running, the third rotating shaft 1313 drives the second flipping part 1311 to flip, so that the watch case switches from the first horizontal transport posture to the third vertical assembly posture.

[0106] Please see details. Figure 10 The locking part 1312 includes four locking members, which are spaced apart along the circumference. This creates a multi-point clamping area and a uniform clamping force when clamping the watch case. Specifically, two aligned locking members are inserted into the hollow area of ​​the watch case to abut against the inner circumferential surface of the watch case, while the other two aligned locking members are shorter in length to abut against the inner end face of the watch case. Thus, the multiple spaced locking members can completely avoid the first key body, the second key body, and the key support, preventing the pre-assembled parts from changing their posture. It is understood that in the subsequent screw-driving process, it is necessary to ensure the positional accuracy between the screw holes on the watch case and the bit of the screw feeding mechanism 133. Therefore, after the watch case is transported to the watch case fixing fixture 132, a high-precision posture fine-tuning is required. Therefore, for the third dial adjustment device 131, it is only necessary to ensure that the watch case can be placed in the watch case fixing fixture 132, and there is no need to set up a rotating part 1212 for posture adjustment.

[0107] In one embodiment, the watch case fixing fixture 132 includes a watch case support and a watch case locking part, and a watch case locking assembly is disposed on the watch case support; the watch case locking part has at least two locking members that can approach and move away from each other, each locking member is configured to abut against and limit the watch case and offset the second keycap 200 and the key support; the watch case locking assembly is configured to switch the watch case from a third vertical assembly posture to a screw loading posture.

[0108] In this embodiment, the watch case support can adopt a planar support structure or a curved contour structure. For example, positioning pins or vacuum suction holes are provided on the support surface to constrain the horizontal displacement of the watch case. The locking component can be a wedge block, a pneumatic gripper, or an electromagnetically driven slider. Its movement path forms an angle with the normal direction of the inner circumference of the watch case, for example, cutting into the inner wall of the watch case at a preset angle. Multi-point dynamic clamping is achieved through friction and structural limiting. The watch case locking assembly can integrate a linear module or a rotary cylinder. For example, a servo motor drives a lead screw mechanism to move the locking component a predetermined distance along a preset direction, thereby ensuring the watch case is locked on the watch case support.

[0109] After the watch case is placed on the case carrier, the case carrier can fix the bottom surface of the watch case by vacuum adsorption. Then, the two locking parts are moved away from each other by the driving components such as cylinders and motors, thus forming a clamping effect on the watch case. At the same time, during the movement of the locking part, there will be at least a period of contact with the watch case. Therefore, after the locking part moves into place, it can change the posture of the watch case on the case carrier, thereby forcing the watch case into the screw-loading posture.

[0110] In one embodiment, the screw feeding module 13 is provided with a case picking station and a case locking station. The third dial adjustment device 131 is set corresponding to the case picking station, and the screw feeding mechanism 133 is set corresponding to the case locking station. The screw feeding module 13 has a case docking state. In the case docking state, the locking part 1312 is directly opposite the locking surface of the case carrier.

[0111] In this embodiment, the third dial adjustment device 131 is set at the case picking station so that the case picking station can receive the case located at the third dial adjustment device 131, and the screw feeding mechanism 133 is set at the case locking station so as to perform the screwing process. During this process, the case fixing fixture 132 moves between the case picking station and the case locking station to realize the transfer of the case. When the case fixing fixture 132 receives the case from the third dial adjustment device 131, the locking part 1312 of the third dial adjustment device 131 is directly facing the locking surface of the case carrier. In this way, when the case is transferred, the case in the second vertical assembly posture can be prevented from changing posture.

[0112] This invention also proposes a wristband device assembly bus, which includes a watch case assembly line 100. Specifically, the wristband device assembly bus includes a watch case assembly line 100, a display screen assembly line, a watch dial assembly line, etc. By using an automated wristband device assembly bus, efficient and precise assembly can be achieved. The specific structure of the watch case assembly line 100 is as described in the above embodiments. Since the wristband device assembly bus proposed in this invention adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0113] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A watch case assembly line body configured to install a first button assembly and a second button assembly to a first button hole and a second button hole of a watch case, respectively, the watch case being provided with a button support at an outer periphery of the second button hole, the first button assembly including at least a first button cap, a bar tube, and a nut, and the second button assembly including at least a second button cap and a locking screw, characterized in that, The watch case assembly line body comprises: a base; a first assembly module arranged on the base, configured to assemble the first keycap, the bar tube and the nut of the first button assembly to the watch case; a second assembly module arranged on the base, configured to assemble the second keycap and the locking screw to the watch case; and a conveying module arranged on the base, configured to convey the watch case between the first assembly module and the second assembly module; the second assembly module comprises a keycap feeding sub-module and a screw feeding sub-module, the keycap feeding sub-module and the screw feeding sub-module are connected, and the conveying module is further configured to convey the watch case from the keycap feeding sub-module to the screw feeding sub-module; the keycap feeding sub-module comprises a second watch disc adjusting device and a keycap dropping mechanism, and the screw feeding sub-module comprises a third watch disc adjusting device, a watch case fixing tool and a screw feeding mechanism; the second watch disc adjusting device is configured to pick up the watch case on the conveying module and adjust the watch case to a second vertical assembly posture with the second button hole exposed, so that the second button hole of the watch case is opposite to the lifting end of the keycap dropping mechanism, the keycap dropping mechanism is configured to drive the second keycap on the lifting end to assemble to the second button hole of the watch case, the third watch disc adjusting device is configured to pick up the watch case on the conveying module and convey to the watch case fixing tool, the watch case fixing tool is configured to switch the watch case to a screw feeding posture, and the screw feeding mechanism is configured to assemble the screw to the button support to assemble with the second keycap; the watch case on the conveying module is in a first horizontal transportation posture; the second watch disc adjusting device comprises a first overturning part and a rotating part, the rotating part is fixedly arranged on the first overturning part; the first overturning part is configured to overturn the watch case, so that the watch case is switched from the first horizontal transportation posture to a second vertical assembly posture, and the rotating part is configured to pick up and rotate the watch case, so that the insertion port of the second button hole is opposite to the keycap dropping mechanism in the second vertical assembly posture.

2. The case assembly line body according to claim 1, wherein the first assembly module comprises: a first watch disc adjusting device, configured to pick up the watch case on the conveying module and adjust the watch case to a first assembly posture with the first button hole exposed; a bar tube mounting device, configured to pick up the bar tube in a bar tube warehouse and insert the bar tube into the first button hole of the watch case on the first watch disc adjusting device in a predetermined posture; a first keycap mounting device, configured to pick up the first keycap in a button warehouse and insert the first keycap into the first button hole of the watch case in the first assembly posture in a predetermined posture; and The nut mounting device is configured to pick up the nut in the nut magazine and drive the nut to fasten with the first key cap in a predetermined posture.

3. The case assembly line body according to claim 2, wherein The first assembly module further comprises a screw locking device configured to pick up a screw in a screw magazine and lock the screw between the barrel and the watch case to fix the barrel on the watch case.

4. The case assembly line body according to claim 3, wherein The watch case at the conveying module is in a first horizontal transportation posture; the first assembly posture is a first vertical assembly posture; The first dial adjusting device comprises a rotating clamping mechanism, which comprises a rotating disc and a jaw structure arranged on the rotating disc, the jaw structure is configured to grab the watch case, and the rotating disc is configured to drive the jaw structure to rotate along the axial direction of the dial to make the dial be in the first vertical assembly posture and the first key hole be arranged upward; the side of the dial where the jaw is arranged is provided with a guide groove configured to accommodate the nut; The nut mounting device comprises a nut feeding mechanism and a pushing mechanism, the nut feeding mechanism is configured to pick up the nut in the nut magazine to the guide groove; and the pushing mechanism is arranged in the guide groove and is configured to push the nut along the guide groove to assemble with the first key cap.

5. The case assembly line body according to claim 1, wherein The second dial adjusting device further comprises a key cap abutting portion fixedly arranged on the turning portion and / or the rotating portion; The key cap abutting portion is configured to abut and limit the second key cap of the watch case.

6. The case assembly line body according to claim 1, wherein The watch case at the conveying module is in a first horizontal transportation posture; The third dial adjusting device comprises a second turning portion and a locking portion, the locking portion is arranged on the second turning portion; the second turning portion is configured to turn the watch case to switch from the first horizontal transportation posture to a third vertical assembly posture, and the locking portion has at least two locking members which can approach and move away from each other, and each locking member is configured to abut the inner circumferential surface of the watch case and be located away from the second key cap and the key support.

7. The case assembly line body according to claim 6, wherein The watch case fixing tool comprises a watch case carrier and a watch case locking portion, the watch case locking assembly is arranged on the watch case carrier; the watch case locking portion has at least two locking members which can approach and move away from each other, and each locking member is configured to abut and limit the watch case and be located away from the second key cap and the key support; the watch case locking assembly is configured to switch the watch case from the third vertical assembly posture to a screw feeding posture; and / or The screw feeding sub-module is provided with a watch case material taking station and a watch case locking station, the third dial adjusting device is arranged corresponding to the watch case material taking station, and the screw feeding mechanism is arranged corresponding to the watch case locking station; the screw feeding sub-module has a watch case butt joint state, in which the locking portion faces the locking surface of the watch case carrier.

8. A wristband device assembly bus, comprising: The wristband equipment assembly bus comprises the watch case assembly line body according to any one of claims 1 to 7.

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