Watch case assembly method and wristband device assembly bus

Abstract

This invention relates to the field of smart wearable device manufacturing technology, and particularly to a watch case assembly method and a wristband device assembly bus. The watch case assembly method includes: controlling a first dial adjustment device to drive the watch case on a conveyor module into a first assembly posture, so that the first button hole is exposed and faces the first keycap mounting device; controlling a spring feeding device, the first keycap mounting device, and a retaining ring mounting device to coordinate their actions to assemble the first button to the watch case via the first button hole; controlling a second dial adjustment device to drive the watch case with the first button installed into a second assembly posture, so that the second button hole is exposed and faces the wristband mounting device; controlling the wristband mounting device, the second keycap mounting device, the nut mounting device, and the screw tightening device to coordinate their actions to assemble the second button to the watch case via the second button hole. This invention aims to improve product processing efficiency and yield by automating the assembly of the watch case and the button.

Description

Technical Field

[0001] This invention relates to the field of smart wearable device manufacturing technology, and in particular to a watch case assembly method 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 method that aims to complete the assembly between the watch case and the buttons through an automated process, thereby improving product processing efficiency and yield.

[0006] To achieve the above objectives, the present invention provides a watch case assembly method for assembling a watch case and a button assembly. The watch case includes a first button hole and a second button hole. The button assembly includes a first button and a second button. The first button includes a first keycap, a spring, and a retaining ring. The second button includes a second keycap, a bar, a nut, and a screw. A watch case assembly line is provided, comprising a base, a conveying module, a first assembly module, and a second assembly module. The first assembly module includes a first dial adjustment device, a first keycap mounting device, a spring feeding device, and a retaining ring mounting device. The second assembly module includes a second dial adjustment device, a bar mounting device, a second keycap mounting device, a nut mounting device, and a screw tightening device. The watch case assembly method includes:

[0007] The first dial adjustment device is controlled to pick up and drive the watch case on the conveying module into a first assembly posture, so that the first button hole is exposed and faces the first keycap mounting device.

[0008] The spring feeding device, the first keycap mounting device, and the snap ring mounting device are controlled to work together to assemble the first key to the watch case via the first key hole;

[0009] The second dial adjustment device is controlled to pick up and drive the watch case with the first button installed into a second assembly posture, so that the second button hole is exposed and faces the bar tube mounting device.

[0010] The control device for mounting the bar tube, the second keycap mounting device, the nut mounting device, and the screw locking device are coordinated to assemble the second keycap to the watch case via the second keycap hole;

[0011] The first button and the second button are executed in steps during the assembly of the watch case.

[0012] In one embodiment, the first dial adjustment device includes a flipping mechanism and a rotating clamping mechanism, the rotating clamping mechanism including a turntable and a gripper structure; the step of controlling the first dial adjustment device to pick up and drive the watch case on the conveying module into a first assembly posture, so that the first keyhole is exposed and faces the first keycap mounting device, includes:

[0013] The gripper structure of the rotating clamping mechanism is controlled to pick up the watch case in a first horizontal transport posture on the conveying module;

[0014] The flipping mechanism is controlled to switch from the picking posture to the installation posture, and the turntable is controlled to drive the watch case to rotate circumferentially, so that the watch case is turned into a vertical assembly posture with the first button hole facing down. The vertical assembly posture is the first assembly posture.

[0015] In one embodiment, the spring feeding device includes a vibration platform and a feeding mechanism, the feeding mechanism includes a picking pin, and the snap ring mounting device includes a snap ring clamp and a pushing mechanism; the step of controlling the coordinated operation of the spring feeding device, the first keycap mounting device, and the snap ring mounting device to assemble the first key to the watch case via the first key hole includes:

[0016] The vibration of the vibration platform is controlled to keep the spring confined within the limiting hole on the vibration platform and maintain a vertical posture;

[0017] The feeding mechanism controls the picking needle to pick up the spring and assemble it into the first keycap mounting hole picked up by the first keycap mounting device;

[0018] The lifting mechanism of the first keycap mounting device drives the first keycap upward into the first button hole of the watch case, which is in the first assembly posture;

[0019] The retaining circlip chuck of the retaining circlip mounting device picks up the retaining circlip, and the pushing mechanism drives the retaining circlip chuck to move toward the watch case, installing the retaining circlip at the engagement point between the watch case and the first keycap.

[0020] In one embodiment, the feeding mechanism further includes a robotic arm and a fixed sleeve disposed on the robotic arm, and the picking needle is retractably inserted into the fixed sleeve; the step of controlling the picking needle of the feeding mechanism to pick up the spring and assemble it into the first keycap mounting hole picked up by the first keycap mounting device includes:

[0021] The picking needle is controlled to extend out of the fixed sleeve and interfere with the spring in the limiting hole of the vibration platform to pick up the spring;

[0022] The robotic arm is controlled to move the picking needle above the first keycap, and the picking needle is controlled to retract into the fixed sleeve, so that the spring falls into the first keycap mounting hole under the abutment of the fixed sleeve.

[0023] In one embodiment, the watch case assembly line further includes an information label attaching module; prior to the step of controlling the first dial adjustment device to pick up and drive the watch case on the conveying module into a first assembly posture so that the first keyhole is exposed and faces the first keycap mounting device, the line further includes:

[0024] The system controls the conveying module to convey the watch case to the information labeling module, and controls the information labeling module to affix information labels to the watch case.

[0025] In one embodiment, the second dial adjustment device includes a rotating clamping mechanism, and the bar tube mounting device includes a vacuum nozzle and a positioning and moving assembly; the step of controlling the bar tube mounting device, the second keycap mounting device, the nut mounting device, and the screw locking device to cooperate in assembling the second key to the watch case via the second key hole includes:

[0026] The rotating clamping mechanism that controls the second dial adjustment device picks up the watch case and rotates it to a vertical assembly position, so that the second button hole faces upward. The vertical assembly position is the second assembly position.

[0027] The vacuum nozzle of the control device for mounting the watch tube picks up the watch tube, and the positioning and moving component drives the watch tube to be inserted into the second button hole of the watch case.

[0028] The screw-locking device is controlled to lock the screw between the bar tube and the watch case;

[0029] The second keycap mounting device is controlled to pick up the second keycap and insert it into the outside of the bar tube;

[0030] The nut mounting device is controlled to fasten the nut to the second keycap.

[0031] In one embodiment, the nut mounting device includes a nut feeding mechanism and a pushing mechanism; the rotary clamping mechanism includes a turntable and a gripper structure disposed on the turntable, the gripper structure being configured to pick up and fix the second keycap; the turntable is provided with a guide groove; the step of controlling the nut mounting device to fasten the nut to the second keycap includes:

[0032] The nut feeding mechanism is controlled to pick up the nut and transport it to the guide groove of the turntable;

[0033] The push mechanism is controlled to push the nut along the guide groove, so that the nut aligns with and is tightened into the threaded hole of the second keycap.

[0034] In one embodiment, the watch case assembly line further includes a welding device; after the step of controlling the nut mounting device to fasten the nut to the second keycap, the method further includes:

[0035] The welding device is controlled to weld the screw to the tube;

[0036] The welding device is controlled to weld the nut to the second keycap.

[0037] In one embodiment, the watch case assembly line further includes a blanking module; after the step of controlling the coordinated operation of the bar tube mounting device, the second keycap mounting device, the nut mounting device, and the screw tightening device to assemble the second key to the watch case via the second keyhole, the line further includes:

[0038] The second dial adjustment device is controlled to rotate the watch case, which has the first button and the second button installed, back to the first horizontal transport posture;

[0039] The conveying module is controlled to transport the watch case to the unloading module, completing the unloading of the assembled watch case.

[0040] The present invention also provides a wristband device assembly bus, the wristband device assembly bus including a watch case assembly line; the watch case assembly line is used for the watch case assembly method described above.

[0041] This technical solution provides a watch case assembly line with a first assembly module, a second assembly module, and a conveying module. The design of "controlling the first dial adjustment device to drive the watch case into the first assembly posture and controlling the second dial adjustment device to drive the watch case into the second assembly posture" replaces the manual step of flipping and rotating the watch case to align the first and second button holes. The two types of dial adjustment devices can accurately and stably align the first button hole with the first keycap mounting device and the second button hole with the bar mounting device, avoiding misalignment of the button holes caused by tactile deviations during manual adjustment (such as the watch case easily shaking when held manually). It also saves the time spent on repeatedly calibrating angles, laying a precise posture foundation for the efficient assembly of the first and second buttons. Secondly, the automated actions of "controlling the spring feeding device, the first keycap mounting device, and the retaining ring mounting device to coordinate the assembly of the first button, and controlling the bar mounting device, the second keycap mounting device, the nut mounting device, and the screw locking device to coordinate the assembly of the second button" replace the multi-step manual operation of picking up springs, bar tubes, pressing keycaps, pushing retaining rings, and nuts. Each device performs assembly with standardized processes and speeds, eliminating errors such as parts easily falling during manual picking, uneven pressure on keycaps, and misalignment of the push spring trajectory. This reduces defects such as spring misalignment, keycap breakage, and stripped screws caused by improper operation, solving the problem of yield fluctuations due to operator condition in traditional manual assembly. Simultaneously, the design of "separate assembly of the first and second buttons in the watch case," combined with the transfer function of the conveyor module between the two modules, ensures that the assembly processes of the first button (containing springs and snap rings) and the second button (containing levers and nuts) are independent and sequentially connected. This avoids process interruptions caused by frequent switching of different types of parts such as springs and levers and adjustment of clamping tools during manual assembly. Combined with the automated collaboration of devices within each module, this significantly increases the watch case assembly volume per unit time, breaking through the efficiency bottleneck of manual multi-process switching and adapting to the large-scale mass production needs of smartwatches and other wristband devices. Attached Figure Description

[0042] 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.

[0043] Figure 1 A structural layout diagram of an embodiment of the first assembly module provided by the present invention;

[0044] Figure 2 A schematic diagram of an embodiment of the first dial adjustment device provided by the present invention;

[0045] Figure 3 A schematic diagram of another embodiment of the first dial adjustment device provided by the present invention;

[0046] Figure 4 A schematic diagram of an embodiment of the first keycap mounting device provided by the present invention;

[0047] Figure 5 This is a schematic diagram of a structure of an embodiment of the snap ring mounting device provided by the present invention;

[0048] Figure 6 This is a schematic diagram of a structure of an embodiment of the feeding mechanism provided by the present invention;

[0049] Figure 7 A structural layout diagram of an embodiment of the vibration platform provided by the present invention;

[0050] Figure 8 A schematic diagram of the structure of an embodiment of the power tube installation device provided by the present invention;

[0051] Figure 9 A schematic diagram of the structure of an embodiment of the turntable provided by the present invention;

[0052] Figure 10 A module layout diagram of an embodiment of the watch case assembly line provided by the present invention;

[0053] Figure 11 A first flowchart of an embodiment of the watch case assembly method provided by the present invention;

[0054] Figure 12 A second flowchart of an embodiment of the watch case assembly method provided by the present invention;

[0055] Figure 13 A third flowchart of an embodiment of the watch case assembly method provided by the present invention;

[0056] Figure 14 A fourth flowchart of an embodiment of the watch case assembly method provided by the present invention;

[0057] Figure 15 This is a fifth flowchart of an embodiment of the watch case assembly method provided by the present invention.

[0058] Explanation of icon numbers:

[0059] 100. Watch case assembly line; 10. Base; 101. Snap ring hopper; 11. Watch case hopper; 12. Information label attaching module; 13. First assembly module; 14. Oiling module; 15. Second assembly module; 16. Unloading module; 17. Conveying module; 20. First dial adjustment device; 21. Flipping mechanism; 22. Rotary clamping mechanism; 23. Rotating shaft; 24. Fixed bracket; 25. Turntable; 26. Guide groove; 30. First keycap mounting device; 31. Lifting mechanism; 32. Key support; 33. Guide component; 40. Snap ring mounting device; 41. Pushing mechanism; 42. Snap ring chuck; 50. Spring feeding device; 51. Vibration platform; 60. Feeding mechanism; 61. Fixed sleeve; 62. Picking needle; 70. Bar tube mounting device; 71. Vacuum nozzle; 80. Pushing mechanism.

[0060] 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

[0061] 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.

[0062] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used 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 indication will also change accordingly.

[0063] Furthermore, the use of terms such as "first" and "second" in this invention is 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. Therefore, 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 a person 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.

[0064] To achieve the above objectives, please refer to Figure 11This invention provides a watch case assembly method for assembling a watch case and a button assembly. The watch case includes a first button hole and a second button hole. The button assembly includes a first button and a second button. The first button includes a first keycap, a spring, and a retaining ring. The second button includes a second keycap, a spring tube, a nut, and a screw. A watch case assembly line 100 is provided, which includes a base 10, a conveying module 17, a first assembly module 13, and a second assembly module 15. The first assembly module 13 includes a first dial adjustment device 20, a first keycap mounting device 30, a spring feeding device 50, and a retaining ring mounting device 40. The second assembly module 15 includes a second dial adjustment device, a spring tube mounting device 70, a second keycap mounting device, a nut mounting device, and a screw locking device. The watch case assembly method includes:

[0065] S10. Control the first dial adjustment device 20 to drive the watch case on the conveying module 17 into the first assembly posture so that the first key hole is exposed and faces the first keycap mounting device 30.

[0066] S20, the control spring feeding device 50, the first keycap mounting device 30, and the snap ring mounting device 40 work together to assemble the first key to the watch case through the first key hole;

[0067] S30. Control the second dial adjustment device to drive the watch case with the first button installed into the second assembly posture so that the second button hole is exposed and faces the bar tube installation device 70.

[0068] During step S30, the conveying module 17 transports the watch case with the first button already installed to the working area of ​​the second assembly module 15. The conveying module 17 stops after the detection component sends a signal. The rotating clamping mechanism 22 of the second dial adjustment device actuates, its gripper component picks up the watch case, and then the flipping mechanism 21 flips the watch case. Simultaneously, the turntable 25 rotates the watch case circumferentially, ultimately positioning the watch case in a vertical assembly posture with the second button hole facing upwards. At this point, the axis of the second button hole coincides with the axis of the positioning component of the bar tube mounting device 70. This vertical posture is the second assembly posture. After the posture adjustment is completed, the control system sends a ready signal to the bar tube mounting device 70, preparing to proceed to the second button assembly step.

[0069] S40, control bar mounting device 70, second keycap mounting device, nut mounting device, and screw locking device work together to assemble the second key to the watch case via the second key hole;

[0070] The first and second buttons are pressed separately during the assembly of the watch case.

[0071] In this technical solution, a watch case assembly line 100 with a first assembly module 13, a second assembly module 15 and a conveying module 17 is provided. The design of "controlling the first dial adjustment device 20 to drive the watch case into the first assembly posture and controlling the second dial adjustment device to drive the watch case into the second assembly posture" replaces the step of manually flipping and rotating the watch case to align the first button hole and the second button hole. The two types of dial adjustment devices can accurately and stably align the first button hole with the first keycap mounting device 30 and the second button hole with the bar tube mounting device 70, avoiding misalignment of the button holes caused by tactile deviations during manual adjustment (such as the easy shaking of the watch case when held manually). At the same time, it saves the time spent on repeated manual angle calibration, laying a precise posture foundation for the efficient assembly of the first and second buttons. Secondly, with the help of the automated action of "controlling the spring feeding device 50, the first keycap mounting device 30, and the retaining spring mounting device 40 to coordinate the assembly of the first button, and controlling the bar tube mounting device 70, the second keycap mounting device, the nut mounting device, and the screw locking device to coordinate the assembly of the second button", the multi-step manual operation of picking up the spring, bar tube, pressing the keycap, pushing the retaining spring, and the nut is replaced. Each device performs assembly at a standardized process and speed, eliminating errors such as parts easily falling during manual picking, uneven pressure on keycaps, and misalignment of the push spring trajectory. This reduces defects such as spring misalignment, keycap breakage, and stripped screws caused by improper operation, solving the problem of yield fluctuations due to operator condition in traditional manual assembly. Simultaneously, the design of "separate assembly of the first and second buttons in the watch case," combined with the transfer function of the conveyor module 17 between the two modules, ensures that the assembly processes of the first button (containing springs and snap rings) and the second button (containing levers and nuts) are independent and sequentially connected. This avoids process interruptions caused by frequent switching of different types of parts such as springs and levers and adjustment of clamping tools during manual assembly. Combined with the automated collaboration of devices within each module, this significantly increases the watch case assembly volume per unit time, breaking through the efficiency bottleneck of manual multi-process switching and adapting to the large-scale mass production needs of smartwatches and other wristband devices.

[0072] Please see Figure 12 In one embodiment, the first dial adjustment device 20 includes a flipping mechanism 21 and a rotating clamping mechanism 22, the rotating clamping mechanism 22 including a turntable 25 and a gripper structure; step S10 includes:

[0073] S11. The gripper structure of the control rotary clamping mechanism 22 picks up the watch case in the first horizontal transport posture on the conveying module 17.

[0074] When step S11 is executed, the rotating clamping mechanism 22 of the first dial adjustment device 20 is activated. Its gripper component first opens to a size that matches the width of the watch case, and then, driven by the moving component, moves precisely to directly above the watch case on the conveying module 17, which is in a horizontal transport posture. After the gripper component moves downward, it closes, clamping the two sides of the watch case with a preset clamping force. The clamping position avoids the marking attachment area, ensuring that the watch case is stable and does not shift during subsequent actions. At this time, the watch case still maintains the first horizontal transport posture, waiting to enter the posture conversion stage.

[0075] S12. Control the flipping mechanism 21 to switch from the picking posture to the installation posture, and at the same time control the turntable 25 to drive the watch case to rotate circumferentially, so that the watch case is turned into a vertical assembly posture with the first button hole facing down. The vertical assembly posture is the first assembly posture.

[0076] When executing step S12, the flipping mechanism 21 is first controlled to rotate the rotating clamping mechanism 22 and the watch case from the picking posture (the clamping jaw axis is parallel to the conveying direction) to the installation posture (the clamping jaw axis is perpendicular to the conveying direction). During the flipping process, the turntable 25 of the rotating clamping mechanism 22 is simultaneously controlled to rotate the watch case circumferentially. The rotation angle is preset according to the watch case structure, and finally the watch case is turned into a vertical assembly posture with the first button hole facing downward. At this time, the axis of the first button hole is completely coincident with the axis of the lifting component of the first keycap mounting device 30 below. This vertical posture is the first assembly posture. After the posture adjustment is completed, the control system sends a ready signal to the first keycap mounting device 30 to prepare for the first button assembly step.

[0077] Please see Figure 13 In one embodiment, the spring feeding device 50 includes a vibrating platform 51 and a feeding mechanism 60. The feeding mechanism 60 includes a robotic arm, a fixed sleeve 61, and a picking needle 62. The snap ring mounting device 40 includes a snap ring clamp 42 and a pushing mechanism 41. Step S20 includes:

[0078] S21. Control the vibration of the vibration platform 51 to keep the spring in the limiting hole and maintain a vertical posture.

[0079] When step S21 is executed, the vibration platform 51 of the spring feeding device 50 is activated, and a batch of springs fall from the hopper into the material trough of the vibration platform 51. Under the action of vibration, the springs slide one by one into the limiting holes on the surface of the platform. The limiting holes constrain the springs, causing them to automatically adjust to a vertical posture during vibration, and each limiting hole can only accommodate one spring, realizing automatic sorting and posture calibration of the springs. When it is detected that the limiting hole is full of springs, a signal is sent to the feeding mechanism 60 to prepare for the spring picking stage.

[0080] The vibration platform 51 enables automatic sorting and vertical orientation calibration of springs, replacing manual sorting and placement of springs. This avoids the problems of spring tilting and falling that are prone to occur during manual operation, improves the efficiency of spring loading and the consistency of posture, and provides qualified spring raw materials for subsequent assembly.

[0081] S22, the feeding needle 62 of the feeding mechanism 60 picks up the spring and assembles it into the first keycap mounting hole picked up by the first keycap mounting device 30;

[0082] By cooperating with the picking pin 62 and the fixed sleeve 61, the spring is automatically picked up and assembled, replacing manual picking and assembly with tweezers. This avoids the spring falling or tilting during the assembly process, ensures the coaxiality of the spring and the keycap mounting hole, improves assembly accuracy, and greatly increases assembly efficiency.

[0083] S23. The lifting mechanism 31 of the control first keycap mounting device 30 drives the first keycap upward to be pushed into the first key hole of the watch case in the first assembly posture;

[0084] When step S23 is executed, the lifting mechanism 31 of the first keycap mounting device 30 is activated, driving the supporting component to move upward at a preset speed. The supporting component drives the spring-loaded first keycap to rise synchronously, precisely pushing the first keycap into the first button hole of the watch case in the first assembly posture from below. When the lifting mechanism 31 detects that the thrust has reached a preset threshold (indicating that the keycap has fully entered the button hole), it stops moving and maintains the position for a preset time to ensure that the first keycap's clip is fully engaged with the slot on the inner wall of the watch case. Then, the lifting mechanism 31 resets, completing the initial fixing of the keycap.

[0085] The lifting mechanism 31 uses a stable thrust to push the keycap into the key hole, replacing manual pressing of the keycap. This avoids the problem of uneven manual pressing causing the keycap to be misassembled or deformed, and ensures that the keycap and the case are fully engaged, thus improving the assembly quality and stability of the first key.

[0086] S24. The retaining clip 42 of the retaining clip mounting device 40 picks up the retaining clip, and the push mechanism 41 drives the retaining clip 42 to move toward the watch case, installing the retaining clip at the engagement point between the watch case and the first keycap.

[0087] During step S24, the snap ring chuck 42 of the snap ring mounting device 40 picks up the snap ring from the snap ring hopper 101, and the pushing mechanism 41 drives the snap ring chuck 42 to move towards the watch case. When the snap ring chuck 42 reaches the engagement point between the watch case and the first keycap, the chuck opens to release the snap ring. Under the constraint of its own structure and the slot, the snap ring is embedded in the annular groove between the watch case and the first keycap, completing the assembly of the first key. After assembly, the pushing mechanism 41 drives the snap ring chuck 42 to reset, ready for the next operation.

[0088] The snap ring chuck 42 and the push mechanism 41 work together to install the snap ring, replacing the manual tool used to engage the snap ring. This avoids misalignment of the snap ring installation position, ensures that the snap ring is accurately embedded in the slot, effectively prevents the first button from becoming loose, and improves the structural stability and service life of the button.

[0089] Please see Figure 14 In one embodiment, the feeding needle 62 of the feeding mechanism 60 is retractably inserted into the fixed sleeve 61; step S22 includes:

[0090] S221, control the picking needle 62 to extend out of the fixed sleeve 61 and make interference fit with the spring in the limiting hole of the vibration platform 51 to pick up the spring;

[0091] During step S221, the robotic arm of the feeding mechanism 60 moves the fixed sleeve 61 and the picking needle 62 above the vibration platform 51. Under the action of the driving component, the picking needle 62 extends out of the fixed sleeve 61 and inserts into the inner hole of the spring in the limiting hole. Since the picking needle 62 and the inner diameter of the spring are interference-fitted, the spring is firmly sleeved on the picking needle 62, achieving stable picking. Subsequently, the picking needle 62 remains in the extended state, carrying the spring as it moves with the robotic arm.

[0092] S222, control the robotic arm to move the picking needle 62 to above the first keycap, control the picking needle 62 to retract into the fixed sleeve 61, so that the spring falls into the first keycap mounting hole under the abutment of the fixed sleeve 61.

[0093] During step S222, the robotic arm moves the picking needle 62 and the spring above the supporting component of the first keycap mounting device 30. At this time, the gripper of the first keycap mounting device 30 has picked up the first keycap from the keycap hopper and placed it on the supporting component with the keycap mounting hole facing upwards and its axis coinciding with the axis of the picking needle 62. The drive component controls the picking needle 62 to retract into the fixed sleeve 61. During the retraction process, the lower end face of the fixed sleeve 61 contacts the upper end face of the spring and generates a resisting force. As the picking needle 62 continues to retract, the spring disengages from the picking needle 62 and falls smoothly into the mounting hole of the first keycap under the action of the resisting force, completing the initial assembly of the spring and the keycap.

[0094] In one embodiment, the watch case assembly line 100 further includes an information label attaching module; prior to step S10, the following steps are also included:

[0095] S01, control the conveying module 17 to convey the watch case to the information labeling module, and control the labeling module to affix information labels to the watch case.

[0096] In step S01, the loading station first places the watch cases to be assembled in batches at the starting end of the conveying module 17. The conveying module 17 starts, carrying the watch cases in a first horizontal transport posture towards the information labeling module. When the watch cases reach the working area of ​​the labeling module, the detection component sends a signal to the control system, and the conveying module 17 stops running. The positioning component of the labeling module activates to fix the position of the watch cases and prevent them from shifting during the labeling process. Then, the labeling component of the labeling module starts, picks up the label with product information, calibrates the labeling position through the positioning system (avoiding the button holes and functional areas of the watch cases), and applies the label flatly to the surface of the watch cases, ensuring that the label is free of air bubbles and skewed. After the labeling is completed, the positioning component resets, and the conveying module 17 starts again, conveying the labeled watch cases to the first assembly module 13, ready to enter the posture adjustment stage.

[0097] By automating the application of information labels, replacing manual labeling, problems such as label misalignment and air bubbles that are prone to occur during manual operation are avoided, ensuring that the labels are accurately positioned and firmly attached. At the same time, the information labels are seamlessly integrated with the assembly process without the need for additional manual intervention, which not only improves production efficiency but also provides a reliable foundation for subsequent product traceability, facilitating quality control and after-sales tracking.

[0098] Please see Figure 15 In one embodiment, the second dial adjustment device includes a rotating clamping mechanism 22, and the bar tube mounting device 70 includes a vacuum nozzle 71 and a positioning and moving assembly; step S40 includes:

[0099] S41. Control the rotating clamping mechanism 22 of the second dial adjustment device to pick up the watch case and rotate it to the vertical assembly posture, so that the second button hole faces upward. The vertical assembly posture is the second assembly posture.

[0100] When performing step S41, the rotating clamping mechanism 22 of the second dial adjustment device maintains the clamping state on the watch case, ensuring that the watch case is stably in the second assembly posture, with the second button hole facing upward and in a fixed position, providing a precise reference for the subsequent installation of the bar tube.

[0101] The mechanical structure maintains the stability of the watch case in the second assembly position, avoiding component installation deviations caused by watch case shaking during assembly, and providing a stable benchmark for the sequential assembly of the watch case, screws, keycaps, and nuts.

[0102] S42. The vacuum nozzle 71 of the control tube installation device 70 picks up the tube, and the positioning and moving component drives the tube to be inserted into the second button hole of the watch case.

[0103] During step S42, the vacuum nozzle 71 of the tube installation device 70 picks up the tube from the tube hopper. The positioning and moving component moves the vacuum nozzle 71 above the second button hole on the watch case, and then moves it downwards to precisely insert the tube into the second button hole. After the insertion depth reaches the preset value, the vacuum nozzle 71 releases negative pressure and detaches from the tube, completing the initial installation of the tube. The positioning and moving component then moves the nozzle back to its original position.

[0104] S43. The control screw locking device locks the screw between the bar tube and the watch case;

[0105] When performing step S43, the electric screwdriver of the screw locking device picks up a screw from the screw hopper, moves it to the connection hole between the bar tube and the watch case, and starts rotating with a preset torque to lock the screw between the bar tube and the watch case, so that the bar tube is firmly fixed to the watch case. Then the electric screwdriver resets.

[0106] S44. Control the second keycap mounting device to pick up the second keycap and insert it into the outside of the bar tube;

[0107] When performing step S44, the gripper of the second keycap mounting device picks up the second keycap from the keycap hopper, moves it to the outside of the bar tube, and precisely places the second keycap onto the bar tube, ensuring that the keycap fits snugly against the bar tube, thus completing the initial assembly of the second keycap.

[0108] S45, The control nut mounting device secures the nut to the second keycap.

[0109] In one embodiment, the nut mounting device includes a nut feeding mechanism and a pushing mechanism 80. The rotating clamping mechanism 22 includes a turntable 25 and a gripper structure disposed on the turntable 25. The gripper structure is configured to pick up and fix the second keycap. The turntable 25 is provided with a guide groove 26. Step S45 includes:

[0110] S451, Control the nut feeding mechanism to pick up the nut and convey it to the guide groove 26 of the turntable 25;

[0111] When performing step S451, the nut feeding mechanism of the nut installation device picks up the nut from the nut hopper and transports it to the guide groove 26 of the turntable 25. The guide groove 26 constrains the nut to ensure that the nut is stable in posture when moving in the groove and does not rotate or deviate.

[0112] S452, Control the jacking mechanism 80 to push the nut along the guide groove 26 so that the nut aligns with and is tightened with the threaded hole of the second keycap.

[0113] When step S452 is executed, the push mechanism 80 is activated and pushes the nut in the guide groove 26 to move along the groove at a preset speed. When the nut reaches the end of the guide groove 26, its axis coincides with the axis of the threaded hole of the second keycap. The push mechanism 80 continues to apply the push force to make the nut initially connect with the threaded hole. Then, in conjunction with the rotating component, the nut is rotated to completely fasten the nut to the threaded hole of the second keycap, thus completing the assembly of the second key.

[0114] The guide groove 26 and the push mechanism 80 work together to push and tighten the nut, replacing the manual hand-held nut alignment with the threaded hole. This avoids positional deviation and thread stripping of the nut during installation, ensures a firm connection between the nut and the keycap, and improves assembly efficiency.

[0115] In one embodiment, after step S45, the following step is further included:

[0116] S46. Control the welding device to weld the screw to the tube;

[0117] When performing step S46, the positioning component of the welding device drives the case to make fine adjustments, so that the connection between the screw and the tube is precisely aligned with the welding head. The welding device starts with preset parameters and emits a laser to act on the connection part, so that the local metal melts and fuses. After cooling, a strong welding point is formed, which strengthens the connection between the screw and the tube.

[0118] S47. Control the welding device to weld the nut to the second keycap.

[0119] When performing step S47, the positioning component drives the watch case to make a fine adjustment again, so that the connection between the nut and the second keycap is aligned with the welding head. The welding device starts laser welding with the same parameters, and the welding reinforcement of the two is achieved through local melting and fusion, so as to prevent the nut from loosening during long-term use.

[0120] Laser welding strengthens the connection between the screw and the tube, and the nut and the second keycap, replacing the traditional mechanical fixing method. This significantly improves the connection strength, avoids loosening problems that may occur during long-term use, greatly improves the durability of the second button, and meets the needs of long-term wear of wristband devices.

[0121] In one embodiment, step S40 is followed by the step:

[0122] S50: Control the second dial adjustment device to rotate the watch case with the first and second buttons installed back to the first horizontal transport posture.

[0123] When step S50 is executed, the flipping mechanism 21 of the second dial adjustment device drives the watch case to flip from the second assembly posture back to the first horizontal transport posture. The turntable 25 makes a synchronous fine adjustment to ensure that the dial surface of the watch case is flat. Then the jaws of the rotating clamping mechanism 22 open and release the watch case onto the conveying module 17.

[0124] S60, the control conveying module 17 conveys the watch case to the unloading module 16 to complete the unloading of the watch case after assembly.

[0125] When step S60 is executed, the conveying module 17 is started, and the watch case with the first button and the second button installed is conveyed to the unloading module 16. The conveying structure of the unloading module 16 conveys the watch case to the subsequent inspection station (such as button feel inspection and appearance inspection) to complete the entire watch case assembly process.

[0126] The present invention also provides a wristband device assembly bus, which includes a watch case assembly line; the watch case assembly line is used for the watch case assembly method described above.

[0127] The following is a structural explanation of the watch case assembly line using the method proposed in this invention.

[0128] Please see Figure 1 and Figure 10 In one embodiment, the watch case assembly line 100 includes:

[0129] Base 10;

[0130] A first assembly module 13 is disposed on the base 10. The first assembly module 13 is configured to assemble the first keycap, spring and retaining ring of the first button assembly to the watch case.

[0131] A second assembly module 15, disposed on the base 10, is configured to assemble the bar tube, nut, and second keycap to the watch case; and,

[0132] A conveying module 17 is provided on the base 10 and is configured to convey the watch case between the first assembly module and the second assembly module 15.

[0133] It should be noted that the base 10 is the basic support structure of the entire watch case assembly line 100. It provides a stable installation platform for other modules and components. In practical applications, the base 10 can adopt a variety of different materials and structural designs, such as cast iron platforms or aluminum alloy frames.

[0134] The first assembly module 13 is primarily responsible for assembling the first keycap, spring, and retaining ring of the first button assembly to the watch case. This function can be achieved through various mechanical structures and automated control methods. In one embodiment, the first assembly module 13 employs a multi-axis robotic arm in conjunction with an automated feeding device. The multi-axis robotic arm possesses high flexibility and high-precision motion control capabilities, enabling it to accurately grasp and place components in three-dimensional space. A specially designed gripper is installed at the end of the robotic arm, featuring adaptive adjustment capabilities. This gripper automatically adjusts its clamping force and position according to the different sizes and shapes of the first keycap, spring, and retaining ring, ensuring stable grasping. For example, the automated feeding device includes three independent vibratory feeders, used to transport the first keycap, spring, and retaining ring, respectively. The vibratory feeders arrange and transport the components in an orderly manner to designated picking positions through vibration. The robotic arm sequentially grasps the components from the picking positions of each vibratory feeder according to a preset program and accurately assembles them into the first button hole of the watch case. For example, first, the first keycap is grasped, placed into the first keyhole, and initially positioned. Then, the spring is grasped and accurately placed onto the corresponding position of the first keycap. Finally, the retaining ring is grasped and installed into the designated position, completing the assembly of the first key assembly. In another embodiment, the first assembly module 13 adopts a turntable 25 type assembly structure. In this case, the first module includes a rotatable circular turntable 25 with multiple stations evenly distributed on it. Each station corresponds to a fixing fixture for a watch case to be assembled. Around the turntable 25, multiple assembly workstations are arranged, each responsible for assembling the first keycap, spring, and retaining ring. As the turntable 25 rotates, the watch case passes through each assembly workstation sequentially with the fixture. For example, at the first keycap assembly workstation, a mechanical device with vacuum adsorption function picks up the first keycap from the keycap hopper above and accurately places it into the first keyhole of the watch case. Next, the watch case rotates with turntable 25 to the spring assembly station, where a specially designed spring feeding mechanism pushes the spring out of the material box via a mechanical pusher and uses a guide device to accurately fit the spring onto the first keycap. Finally, at the circlip assembly station, a pneumatic gripper picks up the circlip from the circlip tray and installs it into the corresponding position on the watch case.

[0135] The second assembly module 15 is responsible for assembling the keycap, nut, and second keycap to the watch case, and its structure and operation vary. In one embodiment, the second assembly uses a linear guide rail assembly structure. A set of parallel linear guide rails are installed on the base 10, and an assembly platform that can slide along the guide rails is provided on the guide rails. The assembly platform is equipped with multiple assembly mechanisms with different functions, including a keycap installation mechanism, a nut tightening mechanism, and a second keycap installation mechanism. The keycap installation mechanism uses a pneumatic gripper in conjunction with a linear module. The pneumatic gripper picks up the keycap from the keycap hopper and then accurately inserts the keycap into the second keyhole of the watch case through the linear module. The second keycap installation mechanism uses a vacuum suction cup to pick up the second keycap from the second keycap hopper and press it onto the top of the keycap. The nut tightening mechanism uses an electric screwdriver. After the second keycap is installed in place, the electric screwdriver picks up the nut from the nut hopper and tightens it onto the second keycap to complete the assembly of the second keycap assembly. During assembly, the actions of each mechanism are precisely controlled by a programmable logic controller (PLC) to ensure the assembly sequence and accuracy. In another embodiment, the second assembly module 15 can also employ a collaborative robot module. Collaborative robots offer the safety and flexibility of working alongside humans and are capable of completing relatively complex assembly tasks. This collaborative robot is equipped with a high-precision vision recognition system, using a vision camera to identify and locate the tube, nut, and second keycap. During the tube assembly stage, the collaborative robot uses a special tool on its end effector to pick up the tube from the tube rack and, based on feedback from the vision system, accurately inserts the tube into the second keyhole of the watch case. When installing the second keycap, the collaborative robot uses vacuum suction to remove the second keycap from the tray and accurately presses it onto the tube. For nut installation, the collaborative robot first picks up the nut from the nut feeder and then uses a torque sensor to precisely control the tightening process, ensuring that the tightening torque meets standard requirements.

[0136] The conveying module 17 can be a belt conveyor consisting of a motor, drive roller, and rubber conveyor belt. Alternatively, it can be a watch case clamping fixture driven by a motor and running on a customized track. In other embodiments, the conveying module 17 can also be a chain conveyor or a pneumatic slide transport mechanism. Regardless of the implementation, as long as it can stably support the watch case and transfer it from the watch case hopper 11, ensuring precise flow between the first assembly module 13 and the second assembly module 15, and finally conveying the assembled watch case to the unloading module 16, it is essential to ensure the conveying module 17 meets the automation control requirements of the assembly line (such as coordinated start / stop with the module and positioning accuracy adapted to assembly requirements). All such requirements fall within the protection scope of the conveying module 17 in this watch case assembly line 100 and are not specifically limited here. Different implementations can be flexibly selected based on production scale, watch case material, workshop environment, and precision requirements. The core objective is to ensure the stability, accuracy, and efficiency of the watch case conveying process, providing reliable workstation connection support for subsequent button component assembly.

[0137] Furthermore, the watch case assembly line 100 can employ either parallel or serial feeding via the conveyor module 17. When parallel feeding via the conveyor module 17 is used, the two assembly modules operate synchronously. The first assembly module 13 and the second assembly module 15 are symmetrically positioned on both sides of the conveyor module 17, with their inlet ends precisely aligned with the corresponding outlets of the conveyor module 17. Please refer to [link / reference]. Figure 10 When the conveying module 17 is used for serial feeding, the two assembly modules operate in sequence. At this time, the conveying module 17 is arranged linearly along the base 10. The watch case is first conveyed to the first assembly module 13 or the second assembly module 15 located at the starting position upstream of the conveying module 17. After the first button component or the second button component is assembled, it is then transferred by the conveying module 17 to the second assembly module 15 or the first assembly module 13 located downstream. A buffer area can be provided in the middle of the first assembly module 13 and the second assembly module 15 to buffer the difference in process rhythm between the two assembly modules.

[0138] In this technical solution, the watch case assembly line 100 provided by the present invention, through the combination of a first assembly module 13, a second assembly module 15, and a conveying module 17, can solve the problems of low efficiency and fluctuating yield rate in the manual assembly of smartwatch cases and buttons. Specifically, the first assembly module 13 can sequentially assemble the first keycap, spring, and retaining ring into the first button hole of the watch case to complete the installation of the first button assembly; the second assembly module 15 can assemble the bar tube, nut, and second keycap into the second button hole of the watch case to complete the installation of the second button assembly. The entire process requires no manual operation and is automatically completed by each module and the conveying module 17, avoiding human errors such as uneven force and positioning deviation in manual operation, reducing the generation of defective products due to insufficient assembly precision, and improving the problem of yield rate fluctuation. Furthermore, the conveyor module 17 replaces manual labor in transferring the watch case between the two modules. This eliminates additional quality risks such as bumps and misalignments that may occur during manual handling of the watch case. It also enables the transfer of the watch case between the first assembly module 13 and the second assembly module 15, forming a continuous process of "from first module assembly to second module assembly" or "from second module assembly to first module assembly," avoiding process stoppages caused by manual transfer and further improving the overall production speed of the line. In summary, the watch case assembly line 100 provided in this application can effectively replace manual assembly, significantly improving assembly efficiency to meet the needs of large-scale mass production, while ensuring assembly accuracy and stabilizing product yield by reducing human intervention.

[0139] Please see Figures 1 to 5 In one embodiment, the first assembly module 13 includes:

[0140] First dial adjustment device 20, configured to pick up the watch case located on the conveyor module 17 and adjust the watch case to a first assembly posture with the first button hole exposed.

[0141] The first keycap mounting device 30 is configured to pick up a first keycap from the keycap magazine and insert the spring-loaded first keycap into the first keyhole of the watch case in a predetermined posture.

[0142] A spring feeding device 50 is configured to pick up springs from a spring hopper and assemble them into the mounting holes of the first keycaps in the first keycap mounting device 30; and,

[0143] The snap ring mounting device 40 is configured to pick up snap rings from the snap ring hopper 101 and mount them to engage with the dial and the first keycap.

[0144] It should be noted that the first dial adjustment device 20 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.

[0145] The first keycap mounting device 30 can be a combination of vacuum adsorption and servo press-fitting, i.e., the servo electric cylinder end suction cup adsorbs the first keycap, the pre-installed sleeve below supports the spring, and after the electric cylinder drives the keycap to install the spring, it is inserted into the key hole of the watch case according to the set pressure; or, the first keycap mounting device 30 can also be a combination of pneumatic gripper and guide sleeve, the finger cylinder gripper holds the keycap, the guide sleeve first connects to the spring, then covers the key hole of the watch case for positioning, and finally the pneumatic slide pushes the first keycap into the first key hole of the watch case.

[0146] In this embodiment, the first dial adjustment device 20 first picks up the horizontally conveyed watch case and flips it to the first assembly posture (with the opening facing upwards), so that the first button hole always faces the assembly direction; then the spring feeding device 50 puts the spring into the inner hole of the first keycap picked up by the first keycap mounting device 30, realizing the pre-installation of "keycap + spring"; then, the first keycap mounting device 30 inserts the pre-installed part into the first button hole of the watch case as a whole; finally, the retaining spring mounting device 40 pushes the retaining spring into the annular groove between the keycap and the watch case from the side to complete the installation.

[0147] Please see Figure 2 and Figure 3 In one embodiment, the watch case located in the conveying module 17 is in a first horizontal transport posture; the first assembly posture is a vertical assembly posture.

[0148] The first dial adjustment device 20 includes a flipping mechanism 21 and a rotating clamping mechanism 22 disposed on the flipping mechanism 21. The flipping mechanism 21 is disposed on the base 10 and can switch between a picking posture and an installation posture. The rotating clamping mechanism 22 is configured to pick up the watch case located on the conveying module 17 and drive the watch case to rotate around its circumference. When the flipping mechanism 21 is in the installation posture, the rotating clamping mechanism 22 can drive the dial to rotate to a vertical assembly posture so that the first button hole is set downward.

[0149] It should be noted that the structure of the flipping mechanism 21 can adopt a structure of "fixed bracket 24 + rotating shaft 23 + drive assembly". That is, the fixed bracket 24 is rigidly connected to the base 10 by bolts to ensure stable operation. The rotating shaft 23 is horizontally inserted through the top of the fixed bracket 24, and the shaft end is connected to the drive assembly (such as a servo motor + gearbox, or a pneumatic motor) to provide power for flipping. The middle part of the rotating shaft 23 is fixedly connected to the mounting seat of the rotating clamping mechanism 22 to realize the transmission of the flipping action to the clamping mechanism. At the same time, when the flipping mechanism 21 is in the picking posture, the clamping end of the rotating clamping mechanism 22 is flush with the watch case transport surface of the conveying module 17, which facilitates the horizontal picking of the watch case. In the installation posture, the rotating shaft 23 drives the rotating clamping mechanism 22 to flip, so that the clamped watch case changes from a horizontal state to a vertical state. The flipping stroke can be precisely controlled by limit sensors (such as photoelectric limit and mechanical limit) to avoid over-flipping or under-flipping.

[0150] The rotary clamping mechanism 22 is typically mounted on the rotating shaft 23 of the flipping mechanism 21 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 17; after the flipping mechanism 21 switches to the mounting posture, the rotary drive drives the watch case to rotate circumferentially. Through visual positioning (such as adding an industrial camera to identify the position of the first button hole) or mechanical positioning (such as the watch case edge positioning pin), the first button hole is made to face downwards precisely, completing the adjustment of the vertical assembly posture.

[0151] In this embodiment, the conveying module 17 keeps the watch case in a first horizontal transport posture; the flipping mechanism 21 flips the watch case by 90° to a vertical assembly posture, while the rotating clamping mechanism 22 drives the watch case to rotate circumferentially so that the first button hole faces downward; after the button picking mechanism picks up the first keycap from the hopper, the lifting mechanism 31 pushes the keycap directly into the button hole with the hole facing downward from bottom to top.

[0152] Please see Figure 4 In one embodiment, the first keycap mounting device 30 includes a lifting mechanism 31 and a key picking mechanism. The key picking mechanism is configured to pick up the first keycap from the keycap hopper, and the lifting mechanism 31 is configured to drive the key picking mechanism to move upward so as to push the picked-up first keycap into the first key hole of the watch case located on the attitude adjustment mechanism.

[0153] It should be noted that the key picking mechanism is used to pick up the first keycap from the key cartridge. Its structure can consist of a multi-degree-of-freedom robotic arm and a picking end. For example, the robotic arm (such as a three-axis linear module) is fixed to the base 10 by a bracket and can move horizontally (near the key cartridge) and vertically (picking height). The picking end can be adapted according to the material of the first keycap. For example, if it is a plastic keycap, a vacuum suction cup is used; if it is a metal keycap, a pneumatic gripper can be used (the inner side of the gripper is lined with a rubber bushing to prevent damage to the plating). At the same time, the picking mechanism can be equipped with a position sensor (such as a fiber optic sensor). When the first keycap is detected to be in place in the cartridge, the robotic arm drives the picking end to move to the picking position to complete the keycap gripping. After gripping, the correct keycap posture can be ensured through visual calibration (such as a camera recognizing the keycap mounting hole position) and placed on the lifting mechanism 31 to prepare for subsequent spring assembly and top mounting.

[0154] The lifting mechanism 31 can be driven by a servo cylinder or a ball screw module and has a key support 32. When top mounting is required, the drive source moves the key support 32 upward along the guide 33, thereby causing the first keycap to move upward and push the keycap into the first key hole of the watch case. In addition, the lifting mechanism 31 can be equipped with a built-in pressure sensor to set a top mounting pressure threshold. When the pressure reaches the threshold, the lifting will automatically stop to avoid damage to the keycap or watch case due to excessive pressure and to ensure consistent top mounting depth.

[0155] In this embodiment, the key picking mechanism horizontally picks up the first keycap from the hopper; the lifting mechanism 31 rises vertically, causing the first keycap to be pushed from bottom to top into the first key hole with the opening facing downwards.

[0156] Please see Figure 5 In one embodiment, the first assembly module 13 further includes a retaining ring mounting device 40, which includes:

[0157] Snap ring collet 42, snap ring collet 42 is configured to grip the snap ring; and,

[0158] A drive mechanism 41 is configured to drive the snap ring chuck 42 toward the watch case to assemble the snap ring located on the snap ring chuck 42 with the first keycap and the watch case.

[0159] It should be noted that the design of the snap ring chuck 42 must be adapted to the ring or irregular shape of the snap ring. It typically employs two symmetrically arranged elastic clamping arms. The elastic clamping arms are made of high-elasticity alloys (such as spring steel) or high-hardness engineering plastics, combining elasticity and wear resistance. They can naturally deform and return to their original position during clamping and releasing, avoiding fatigue failure over long-term use. The inner side of the clamping arms has an arc-shaped groove (for ring snap rings) or an irregularly shaped groove (for irregularly shaped snap rings) that matches the shape of the snap ring. The root of the elastic clamping arm can be integrally formed with the chuck base 10. In its natural state, the two clamping arms are in a closed posture with inward tightening. When clamping the snap ring, an external drive (such as a cylinder drive or electromagnetic drive) acts on the middle of the clamping arms, causing the clamping arms to open outward to catch the snap ring. After the drive is removed, the clamping arms return to their original position due to their elasticity, firmly clamping the snap ring and preventing it from falling out. Meanwhile, the snap ring collet 42 can be equipped with an adjustment component (such as an adjustment bolt) to adjust the initial closing distance between the two elastic clamping arms to accommodate snap rings of different sizes (such as snap rings with different inner diameters and thicknesses).

[0160] The structure of the pushing mechanism 41 can be a combination of a linear drive assembly and a guide structure. The linear drive assembly can be a common form such as a pneumatic cylinder, an electric slide, or a ball screw module. The guide structure is typically a parallel linear guide rail, which is fixedly connected to the moving platform of the pushing mechanism 41. The guide rail slider is connected to the base 10, ensuring that the pushing mechanism 41 moves the snap ring chuck 42 along a preset trajectory (such as a horizontal trajectory or a trajectory tilted at a specific angle) to avoid deviation. The installation of the pushing mechanism 41 needs to be coordinated with the first dial adjustment device 20 and the first keycap mounting device 30 for positioning. Its moving direction needs to be aligned with the snap-fit ​​position of the watch case in a vertical assembly posture to ensure that the snap ring chuck 42 can accurately push the snap ring to the assembly position.

[0161] In this embodiment, the clamping direction of the two elastic arms of the snap ring chuck 42 and the moving direction of the pushing mechanism 41 need to be adapted to the vertical posture of the watch case. Typically, a horizontal or slightly downward tilting pushing method is used to avoid other structures of the watch case and the first keycap, directly aligning with their snap ring grooves. The travel distance of the pushing mechanism 41 needs to be set according to the distance between the watch case and the snap ring hopper 101 to ensure that the snap ring can be accurately pushed from the hopper to the assembly position. Simultaneously, the timing of the snap ring mounting device 40 needs to be synchronized with the first keycap mounting device 30. That is, the control system only triggers the snap ring mounting device 40 to start after the first keycap mounting device 30 has completed the keycap top mounting and confirmed that the top mounting is in place, ensuring the complete assembly of the first key assembly (keycap, spring, snap ring). Those skilled in the art can design the timing parameters of the control system based on this collaborative logic, select appropriate sensors and drive components, and ensure seamless cooperation between the snap ring mounting device 40 and other devices in the first assembly module 13, achieving automation and precision in the overall assembly process.

[0162] Please see Figure 6 and Figure 7 In one embodiment, the first assembly module 13 further includes a spring feeding device 50, which includes:

[0163] Vibration platform 51, the vibration platform 51 is provided with at least one limiting hole, during vibration, the spring can be confined in the limiting hole and maintain a vertical posture; and,

[0164] The feeding mechanism 60 includes a robot arm, a fixed sleeve 61, and a picking needle 62. The robot arm is located on the base 10, the fixed sleeve 61 is located on the gripping end of the robot arm, and the picking needle 62 is telescopically inserted into the sleeve. The picking needle 62 is configured to pick up a spring located in the limiting hole.

[0165] The feeding mechanism 60 has a feeding state and a retraction state. In the feeding state, the feeding needle 62 is interference-fitted with the spring in a vertical position. In the retraction state, the feeding needle 62 retracts into the fixed sleeve 61 so that the spring can fall into the mounting hole of the first keycap under the abutment of the fixed sleeve 61.

[0166] It should be noted that the vibration platform 51 consists of a "vibration base + material carrier plate + vibration drive component". The vibration base is fixed to the base 10 by a shock-absorbing pad to prevent vibration transmission from affecting other devices. The material carrier plate is horizontally installed above the vibration base, and at least one limiting hole is opened on the plate surface. The diameter of the limiting hole must be adapted to the outer diameter of the spring (slightly larger than the outer diameter of the spring to ensure that the spring can fall in smoothly without wobbling), and the depth of the hole is slightly less than the length of the spring so that the top of the spring is exposed for easy subsequent pickup. The inner wall of the hole is smoothed (to reduce friction between the spring and the hole wall and prevent the spring from getting stuck). The vibration drive component (such as an electromagnetic vibrator or an eccentric wheel motor) is built into the vibration base, and the vibration intensity of the material carrier plate can be controlled by adjusting the vibration frequency and amplitude.

[0167] The robotic arm, acting as a mobile carrier, employs a multi-axis linear module or articulated robotic arm. It is fixed to the base 10 via a bracket and can move horizontally (between the vibration platform 51 and the first keycap mounting device 30) and vertically (to adjust the material handling and unloading height). The movement accuracy is controlled by a servo motor to ensure precise alignment with the limit hole and the first keycap mounting hole. A fixed sleeve 61, fixed to the gripping end of the robotic arm, has a hollow cylindrical structure. The inner diameter of the sleeve matches the outer diameter of the material handling needle 62 (ensuring smooth extension and retraction of the needle). The bottom of the sleeve has a flat end face, used to abut against the spring top during material retraction. The axis of the sleeve must be coaxial with the moving axis of the robotic arm, and during installation, the relative position of the bottom of the sleeve and the bottom of the material handling needle 62 must be fixed. The picking needle 62 is telescopically inserted into the fixed sleeve 61 and consists of a "needle body + telescopic drive component". The needle body is made of high-strength metal, the tip of the needle is polished smooth, and the diameter of the needle body must be adapted to the inner diameter of the spring (in the picking state, it is interference-fitted with the spring and the spring is picked up steadily by friction). The telescopic drive component (such as a miniature cylinder or electromagnetic push rod) is installed on the top of the fixed sleeve 61, and the output end is connected to the top of the picking needle 62, which can drive the picking needle 62 to extend and retract up and down along the sleeve axis (the extension stroke is slightly greater than the spring length to meet the requirements of picking and unloading materials).

[0168] In this embodiment, when loading springs, a batch of springs are first poured into the carrier plate of the vibration platform 51. The vibration drive is activated, and the carrier plate vibrates. Under the action of vibration, the springs automatically fall into the limiting holes and maintain a vertical posture, completing the positioning. If the limiting holes are full, the excess springs will be pushed to the edge of the carrier plate during vibration, waiting for subsequent positioning. The robot arm moves the fixed sleeve 61 and the picking needle 62 to the top of the vibration platform 51, and adjusts the height so that the picking needle 62 is aligned with the vertically positioned spring. The telescopic drive drives the picking needle 62 to extend downward, and the needle tip inserts into the inner hole of the spring. Due to the interference fit between the picking needle 62 and the spring, the spring is firmly clamped on the picking needle 62. Then the robot arm moves the picking needle 62 and the spring away from the vibration platform 51 and moves them to the top of the keycap of the first keycap mounting device 30 (at this time, the first keycap has been picked up by the key picking mechanism and is maintained in the first horizontal transport posture, with the mounting hole facing upward). During spring assembly, the robot adjusts its height so that the bottom of the picking needle 62 aligns with the mounting hole of the first keycap. The telescopic drive drives the picking needle 62 to retract upwards, and the picking needle 62 moves the spring into the fixed sleeve 61. When the top of the spring contacts the bottom end face of the fixed sleeve 61, the sleeve exerts a downward resisting force on the spring. As the picking needle 62 continues to retract, the spring disengages from the picking needle 62 under the resisting force and falls from the bottom of the picking needle 62 into the mounting hole of the first keycap, completing the spring assembly. Finally, the robot drives the fixed sleeve 61 and the picking needle 62 to reset, ready for the next picking.

[0169] It is easy to see that the vibration platform 51 causes the spring to fall into the limiting hole automatically through vibration. The diameter and depth of the limiting hole ensure that the spring maintains a vertical posture, avoiding the posture deviation of manually placing the spring. Moreover, the timing of the feeding mechanism 60 can be linked with the first keycap installation device 30 (for example, after the first keycap is in place, the feeding mechanism 60 immediately starts feeding), forming a continuous process of "keycap picking up → spring feeding → keycap pre-installation". Compared with manual feeding, the overall assembly cycle is greatly shortened, which greatly improves the automation level and production efficiency of the first assembly module 13.

[0170] Please see Figure 8 and Figure 9 In one embodiment, the second assembly module 15 includes:

[0171] The second dial adjustment device is configured to pick up the watch case located on the conveyor module 17 and adjust the watch case to a second assembly posture with exposed second button holes.

[0172] The bar tube mounting device 70 is configured to pick up the bar tube in the bar tube hopper and insert the bar tube into the second button hole on the upper housing of the second dial adjustment device in a predetermined posture.

[0173] A second keycap mounting device is configured to pick up a second keycap from a keycap magazine and insert it into a second keyhole of the watch case in a predetermined orientation, while the watch case is in a second assembly orientation; and...

[0174] A nut mounting device is configured to pick up nuts from a nut hopper and engage them with a second keycap in a predetermined orientation.

[0175] It should be noted that the specific implementation of the second dial adjustment device can refer to the first dial adjustment device 20 described above.

[0176] Composed of a material picking component (such as a vacuum suction cup / mechanical gripper, adapted to the slender structure of the bar tube) and a positioning and pushing component (such as a linear slide, mounted on the base 10), it can pick up the bar tube from the bar tube hopper and insert it into the second button hole of the watch case in a predetermined posture (such as the axis being coaxial with the second button hole) by the slide drive, ensuring consistent insertion depth.

[0177] The second keycap mounting device typically includes a keycap picking component (such as a gripper / suction cup adapted to the shape of the second keycap) and a lifting drive component (such as a servo cylinder, fixed to the base 10); it can pick up the second keycap from the keycap magazine and drive the keycap to be inserted into the second keyhole with the pre-installed keycap in a predetermined posture (such as aligning the clip with the case slot), thus achieving initial keycap positioning. Its specific structure can be referred to the description of the first keycap mounting device 30 above.

[0178] The nut mounting device typically includes a keycap picking component (such as a gripper / suction cup adapted to the shape of the second keycap) and a lifting drive component (such as a servo cylinder, fixed to the base 10); it can pick up the second keycap from the keycap hopper and drive the keycap to be inserted into the second keyhole with the pre-installed bar tube in a predetermined posture (such as the buckle aligning with the slot of the watch case), thus achieving the initial positioning of the keycap.

[0179] The bar tube installation device 70 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 71 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 used to adjust the picked-up bar tube to a "predetermined attitude" (i.e., the bar tube axis is coaxial with the axis of the second 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 serves as the "moving carrier" of the device, used to drive the picking component and the calibrated bar tube to move precisely to the second 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 material hopper to the posture calibration position to the second button hole insertion position of the watch case", requiring no manual intervention throughout the process.

[0180] In this embodiment, the second dial adjustment device picks up the watch case from the conveying module 17, flips and adjusts it to the second assembly posture, exposing the second button hole and aligning it with the bar tube mounting device 70. Then, the bar tube mounting device 70 picks up the bar tube from the hopper and inserts it into the second button hole of the watch case in a predetermined posture. Next, the second keycap mounting device picks up the second keycap and drives it to insert into the second 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 second keycap, and tightens the nut and keycap with a set torque. After assembly, the watch case is transferred from the conveying module 17 to the next stage.

[0181] It should be noted that hexagonal nuts can be used. Since the nut needs to be locked to the second keycap, at least one of the pickup components in the nut mounting device and the second keycap mounting device must have a rotational function.

[0182] In one embodiment, the second assembly module 15 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.

[0183] 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 with the set torque, thus fixing the bar tube.

[0184] 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.

[0185] In one embodiment, the second assembly module 15 further includes a welding device configured to weld screws to a bar; and / or, the welding device is configured to weld nuts and a second keycap.

[0186] 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 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 second 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.

[0187] 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.

[0188] Please see Figure 9 In one embodiment, the watch case located in the conveying module 17 is in a first horizontal transport posture; the second assembly posture is a vertical assembly posture.

[0189] The first dial adjustment device 20 includes a rotating clamping mechanism 22, which includes a turntable 25 and a jaw structure disposed on the turntable 25. The jaw structure is configured to grip the watch case, and the turntable 25 is configured to drive the jaw structure to rotate along the axis of the dial so that the dial is in a vertical assembly posture with the second button hole facing upward. A guide groove 26 for accommodating a nut is provided on the side of the dial where the jaw is disposed.

[0190] The nut installation device includes a nut feeding mechanism and a pushing mechanism 80. The nut feeding mechanism is configured to pick up nuts from the nut hopper and push them into the guide groove 26. The pushing mechanism 80 is located in the guide groove 26 and is configured to push the nuts along the guide groove 26 to assemble with the second keycap.

[0191] It should be noted that the shape of the guide groove 26 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 completely 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 second keycap" (to ensure that the nut can be pushed to the assembly point by the push mechanism 80), and to ensure that the nut can accurately align with the keycap after being pushed out of the groove.

[0192] The pushing mechanism 80 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 26. The limiting assembly is installed at the end of the guide groove 26 or on the push rod's stroke path to control the push rod's pushing distance and 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.

[0193] In this application, the guide groove 26 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 80 pushes the nut, the guide groove 26 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 second keycap, solving the problem of uncontrollable nut pushing path by manual means. In addition, since the guide groove 26 rotates synchronously with the turntable 25 (because it is located on the turntable 25), when the turntable 25 drives the watch case to a vertical assembly posture, the guide groove 26 also adjusts to the position that matches the second keycap, without the need for additional adjustment of the groove direction, achieving synchronous connection of "watch case posture adjustment - nut path guidance", simplifying the device structure.

[0194] In one embodiment of the present invention, please refer to Figure 1 The watch case assembly line 100 also includes an oiling module 14, which is located between the first assembly module 13 and the second assembly module 15 along the flow direction of the conveying module 17.

[0195] The oiling module 14 is configured to apply a protective layer to the first button and the retaining ring, and the conveying module 17 is also configured to convey the watch case between the first assembly module 13 and the oiling module 14, or to convey the watch case between the second assembly module 15 and the oiling module 14.

[0196] In this embodiment, the oiling module 14 is located between the first assembly module 13 and the second assembly module 15 along the flow direction of the conveying module 17. The flow direction of the conveying module 17 refers to the flow path of the watch case from loading to unloading between the modules. When the first assembly module 13 is upstream of the second assembly module 15, the conveying module 17 is configured to convey the watch case from the first assembly module 13 to the oiling module 14 and then into the second assembly module 15. When the second assembly module 15 is upstream of the first assembly module 13, the conveying module 17 is configured to convey the watch case from the second assembly module 15 to the oiling module 14 and then into the first assembly module 13. Taking the first assembly module 13 being upstream of the second assembly module 15 as an example, the watch case that has completed the assembly of the first button enters the oiling module 14 under the action of the conveying module 17, and the protective layer coating of the first button and the retaining spring is completed in the oiling module 14.

[0197] The oiling module 14 refers to an automated device used to form a protective structure on the button surface. Specifically, it can be implemented using spraying or dispensing equipment with a metering system. The uniform coverage of the protective layer is ensured by controlling the spraying trajectory and coating thickness. The protective layer refers to a covering material with anti-oxidation or lubrication functions, specifically using silicon-based compounds or fluorine coating materials to reduce frictional loss between the buttons and mounting holes. The flow direction of the conveyor module 17 refers to the movement path of the watch case between assembly processes. This can be implemented using a conveyor belt or a robotic arm gripping mechanism, with process connections achieved by setting the station spacing and movement sequence.

[0198] Specifically, after the watch case completes the assembly of the first button and retaining spring in the first assembly module 13, the conveying module 17 transfers the watch case to the oiling module 14. The spraying device in the oiling module 14 performs targeted spraying on the exposed surface of the first button and the contact surface of the retaining spring, forming an anti-corrosion coating with controllable thickness. Subsequently, the watch case is conveyed to the second assembly module 15 for the assembly of the square button, or returned to the first assembly module 13 according to the process sequence to supplement other components. In this process, the oiling process is integrated into the assembly flow, eliminating the need for a separate offline oiling station.

[0199] In one embodiment of the present invention, please refer to Figure 1The watch case assembly line 100 also includes an information label attaching module 12, which is located upstream of the first assembly module 13 or the second assembly module 15 along the flow direction of the conveying module 17.

[0200] The conveying module 17 is configured to convey the case from the information label attaching module 12 to the first assembly module 13 or the second assembly module 15;

[0201] The information label attaching module 12 is equipped with an attaching structure and a flipping robot. The flipping robot is configured to flip the watch case so that the watch case switches from a first flat position to a second flat position. In the second flat position, the attaching structure is used to attach information labels to the watch case.

[0202] In this embodiment, the information identifier can point to a QR code, barcode, specific number, etc. on the watch case to be attached. Specifically, the attachment structure can be a vacuum adsorption device including an integrated air pump and nozzle, or an electrostatic adsorption device, which is not limited here. The flipping robot refers to an automated flipping device with multi-degree-of-freedom gripping function. Specifically, it can be implemented by a servo motor driven rotary gripper mechanism to switch the watch case from a first flat position to a second flat position, and adjust the spatial posture of the watch case to adapt to the film application process.

[0203] Specifically, when the watch case enters the film-applying module, the flipping robot grips the edge of the watch case and flips it around a horizontal axis, changing the watch case from a first flat position to a second flat position. The film-applying area of ​​the watch case is identified by a visual positioning system, and the free end of the film-applying mechanism with information markings moves towards the film-applying area to attach the information markings. The film-applied watch case is then transferred via conveyor module 17 to either the first assembly module 13 or the second assembly module 15 for the assembly of different types of buttons with the watch case.

[0204] 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 method of assembling a watch case and a key assembly, the watch case comprising a first key hole and a second key hole, the key assembly comprising a first key and a second key, the first key comprising a first key cap, a spring, a circlip, the second key comprising a second key cap, a barrel, a nut, a screw, the method comprising the steps of: A watch case assembly line body is provided, which comprises a base, a conveying module, a first assembly module and a second assembly module. The first assembly module comprises a first dial adjusting device, a first key cap mounting device, a spring feeding device and a circlip mounting device. The second assembly module comprises a second dial adjusting device, a bar tube mounting device, a second key cap mounting device, a nut mounting device and a screw locking device. The watch case assembly method comprises: ​ controlling the first dial adjusting device to pick up and drive the watch case on the conveying module into a first assembly posture, so that the first key hole is exposed and faces the first key cap mounting device; controlling the spring feeding device, the first key cap mounting device and the circlip mounting device to cooperate to assemble the first key to the watch case through the first key hole; controlling the second dial adjusting device to pick up and drive the watch case with the first key assembled into a second assembly posture, so that the second key hole is exposed and faces the bar tube mounting device; controlling the bar tube mounting device, the second key cap mounting device, the nut mounting device and the screw locking device to cooperate to assemble the second key to the watch case through the second key hole; wherein the assembly of the first key and the second key on the watch case is performed in steps; the second dial adjusting device comprises a rotating clamping mechanism, the bar tube mounting device comprises a vacuum suction nozzle and a positioning moving assembly; the step of controlling the bar tube mounting device, the second key cap mounting device, the nut mounting device and the screw locking device to cooperate to assemble the second key to the watch case through the second key hole comprises: controlling the rotating clamping mechanism of the second dial adjusting device to pick up the watch case and rotate to a vertical assembly posture, so that the second key hole faces upward, and the vertical assembly posture is the second assembly posture; controlling the vacuum suction nozzle of the bar tube mounting device to pick up the bar tube, and controlling the positioning moving assembly to drive the bar tube to be inserted into the second key hole of the watch case; controlling the screw locking device to lock the screw between the bar tube and the watch case; controlling the second key cap mounting device to pick up the second key cap and insert it outside the bar tube; controlling the nut mounting device to fasten the nut and the second key cap; the nut mounting device comprises a nut feeding mechanism and a pushing mechanism, the rotating clamping mechanism comprises a turntable and a jaw structure provided on the turntable, and the jaw structure is configured to pick up and fix the second key cap; the turntable is provided with a guide groove; the step of controlling the nut mounting device to fasten the nut and the second key cap comprises: controlling the nut feeding mechanism to pick up the nut and convey it to the guide groove of the turntable; controlling the pushing mechanism to push the nut along the guide groove, so that the nut is in butt joint and fastened with the threaded hole of the second key cap.

2. The method of assembling a watch case according to claim 1, wherein, The first dial adjusting device comprises a turnover mechanism and a rotary clamping mechanism, the rotary clamping mechanism comprises a rotating disc and a clamping jaw structure; the step of controlling the first dial adjusting device to pick up and drive the watch case on the conveying module into a first assembly posture so that the first button hole is exposed and faces the first keycap mounting device comprises: controlling the clamping jaw structure of the rotary clamping mechanism to pick up the watch case in a first horizontal transportation posture on the conveying module; controlling the turnover mechanism to switch from a pickup posture to a mounting posture, and simultaneously controlling the rotating disc to drive the watch case to rotate circumferentially, so that the watch case is turned into a vertical assembly posture and the first button hole faces downward, and the vertical assembly posture is the first assembly posture.

3. The method of assembling a watch case of claim 1, wherein, The spring feeding device comprises a vibrating platform and a feeding mechanism, the feeding mechanism comprises a material taking needle, the snap spring mounting device comprises a snap spring collet and a pushing mechanism; the step of controlling the spring feeding device, the first keycap mounting device and the snap spring mounting device to cooperate and assemble the first button to the watch case through the first button hole comprises: controlling the vibrating platform to vibrate so that the spring is limited in a limiting hole on the vibrating platform and kept in a vertical posture; controlling the material taking needle of the feeding mechanism to pick up the spring and assemble to the first keycap mounting hole picked up by the first keycap mounting device; controlling the jacking mechanism of the first keycap mounting device to drive the first keycap to be jacked upward into the first button hole of the watch case in the first assembly posture; controlling the snap spring collet of the snap spring mounting device to pick up the snap spring, and controlling the pushing mechanism to drive the snap spring collet to move toward the watch case, so that the snap spring is mounted to the snap connection position of the watch case and the first keycap.

4. The method of assembling a watch case according to claim 3, wherein, The feeding mechanism further comprises a mechanical hand and a fixed sleeve provided on the mechanical hand, and the material taking needle is telescopically inserted in the fixed sleeve; the step of controlling the material taking needle of the feeding mechanism to pick up the spring and assemble to the first keycap mounting hole picked up by the first keycap mounting device comprises: controlling the material taking needle to extend out of the fixed sleeve and be in interference fit with the spring in the limiting hole of the vibrating platform to pick up the spring; controlling the mechanical hand to drive the material taking needle to move above the first keycap, and controlling the material taking needle to retract in the fixed sleeve, so that the spring falls into the first keycap mounting hole under the abutment of the fixed sleeve.

5. The case assembly method according to any one of claims 1 to 4, wherein, The watch case assembly line body further comprises an information label attaching module; before the step of controlling the first dial adjusting device to pick up and drive the watch case on the conveying module into a first assembly posture so that the first button hole is exposed and faces the first keycap mounting device, the step further comprises: controlling the conveying module to convey the watch case to the information label attaching module, and controlling the information label attaching module to perform information label attaching on the watch case.

6. The method of assembling a case as claimed in claim 1, wherein, The watch case assembly line body further comprises a welding device; after the step of controlling the nut mounting device to fasten connect the nut and the second keycap, the step further comprises: controlling the welding device to weld the screw with the bar pipe; controlling the welding device to weld the nut with the second key cap.

7. The method of assembling a case as claimed in claim 1, wherein, The watch case assembly line body further comprises a blanking module; after the step of cooperatively acting of the bar pipe mounting device, the second key cap mounting device, the nut mounting device, and the screw locking device to assemble the second key through the second key hole to the watch case, the watch case assembly line body further comprises: controlling the second watch dial adjusting device to return the watch case with the first key and the second key to the first horizontal transportation posture; controlling the conveying module to convey the watch case to the blanking module to complete the blanking of the assembled watch case.

8. A wristband device assembly bus, comprising: The wristband device assembly bus comprises a watch case assembly line body; the watch case assembly line body is used for the watch case assembly method in any one of claims 1 to 7.

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