Case assembly line and wristband assembly bus

Abstract

This invention relates to the field of smart wearable device technology, and particularly to a watch case assembly line and a wristband assembly bus. The watch case assembly line includes a base, at least one first assembly module, and at least one second assembly module. The at least one first assembly module is disposed on the base and configured to assemble a first keycap and a retaining spring of a first button assembly to a button mounting hole in the watch case. The at least one second assembly module is disposed on the base and configured to assemble a button bracket, fasteners, and a second keycap to another button mounting hole in the watch case. A conveying module is disposed on the base and configured to convey the watch case between the at least one first assembly module and the at least one second assembly module. This invention aims to solve the problems of low manual efficiency and fluctuating yield rates in watch case and button assembly.

Description

Technical Field

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

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

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

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

[0005] The main objective of this invention is to provide a watch case assembly line that addresses the problems of low manual efficiency and fluctuating yield rates in the assembly of watch cases and buttons.

[0006] To achieve the above objectives, the present invention provides a watch case assembly line for respectively mounting at least one first button assembly and at least one second button assembly to a watch case. The first button assembly includes at least a first keycap and a retaining spring, and the second button assembly includes at least a second keycap, a button bracket, and a fastener. The watch case has at least two button mounting holes. The watch case assembly line includes:

[0007] Base;

[0008] At least one first assembly module is disposed on the base, the first assembly module being configured to assemble the first keycap and the retaining spring of the first key assembly to a key mounting hole of the case;

[0009] At least one second assembly module is disposed on the base, the second assembly module being configured to assemble the key bracket, the fastener, and the second keycap to another key mounting hole of the watch case; and

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

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

[0012] A dial adjustment device is configured to pick up the watch case located on the transport module and adjust the watch case to an assembled position with at least one button mounting hole exposed.

[0013] A keycap mounting device configured to pick up a first keycap from a keycap magazine and insert the first keycap into the keycap mounting hole of the watch case in the assembled state, in a predetermined orientation; and

[0014] A retaining ring mounting device is configured to pick up the retaining ring from the retaining ring hopper and mount the retaining ring to engage with the dial and the keycap.

[0015] In one embodiment, the watch case located on the conveying module is in a horizontal transport posture; the assembly posture is a vertical assembly posture; the dial adjustment device includes a first flipping mechanism and a first rotating clamping mechanism disposed on the first flipping mechanism, the first flipping mechanism being disposed on the base and switchable between a picking posture and an installation posture; the first rotating clamping mechanism is configured to pick up the watch case located on the conveying module and drive the watch case to rotate circumferentially therearound; wherein, when the first flipping mechanism is in the picking posture, the first flipping mechanism can pick up the watch case located on the conveying module; when the first flipping mechanism is in the installation posture, the first rotating clamping mechanism can drive the dial to rotate to the vertical assembly posture; and / or

[0016] The keycap mounting device includes a pressing mechanism and a key picking mechanism. The key picking mechanism is configured to pick up the first keycap from the keycap hopper. The pressing mechanism is configured to drive the key picking mechanism to press the picked-up first keycap into the corresponding key mounting hole of the watch case located on the dial adjustment device.

[0017] In one embodiment, the snap ring mounting device includes:

[0018] Snap ring collet, the snap ring collet being configured to grip the snap ring; and

[0019] A pushing mechanism configured to drive the retaining clip head toward the watch case to assemble the retaining clip located on the retaining clip head with the first keycap and the watch case.

[0020] In one embodiment, the first keycap includes a cap body and two springs disposed on the cap body; the first assembly module further includes a spring feeding device, the spring feeding device comprising:

[0021] A vibration platform, wherein the vibration platform is provided with at least one limiting hole, and during vibration, the spring can be confined within the limiting hole and maintain a vertical posture; and

[0022] The feeding mechanism includes a robotic arm, a fixed sleeve, and a picking needle. The robotic arm is disposed on the base, the fixed sleeve is disposed on the gripping end of the robotic arm, and the picking needle is retractably inserted into the sleeve. The picking needle is configured to pick up the spring located in the limiting hole.

[0023] The feeding mechanism has a feeding state and a retraction state. In the feeding state, the feeding needle is interference-fitted with the spring in a vertical position. In the retraction state, the feeding needle retracts into the fixed sleeve so that the spring can fall into the mounting hole of the cap body in a horizontal position under the abutment of the fixed sleeve.

[0024] In one embodiment, the second assembly module includes:

[0025] A dial adjustment device is configured to pick up the watch case located on the transport module and adjust the watch case to an assembled position with at least one button mounting hole exposed.

[0026] A keycap mounting device is configured to pick up a second keycap from a keycap magazine and insert the second keycap into the keycap mounting hole of the watch case in the assembled state in a predetermined posture.

[0027] A bracket mounting device configured to pick up the button bracket from a bracket hopper and mount the button bracket onto the watch case located on the dial adjustment device in a predetermined orientation; and

[0028] A fastener mounting device is configured to pick up the fastener from a fastener hopper and drive the fastener to be fastened to the second keycap and / or the key support in a predetermined posture.

[0029] In one embodiment, the watch case located in the conveying module is in a horizontal transport posture; the assembly posture is a vertical assembly posture;

[0030] The dial adjustment device includes a first flipping mechanism and a rotating clamping mechanism. The first flipping mechanism is disposed on the base and can switch between a picking posture and an installation posture. The rotating clamping mechanism includes a turntable disposed on the first flipping mechanism and a gripper structure disposed on the turntable. The gripper structure is configured to grip the watch case. The turntable is configured to drive the gripper structure to rotate circumferentially along the dial so that the dial is in the vertical assembly posture with the button holes facing upward.

[0031] When the first flipping mechanism is in the picking posture, it can pick up the watch case located on the conveying module; when the first flipping mechanism is in the mounting posture, the rotating clamping mechanism can drive the dial to rotate to the vertical assembly posture so that the button hole faces upward.

[0032] In one embodiment, the button bracket is a bar tube, and the fastener is a nut; the dial has a guide groove for accommodating the nut on one side where the claw structure is located;

[0033] The fastener installation device includes a nut feeding mechanism and a pushing mechanism. The nut feeding mechanism is configured to pick up the nut from the fastener hopper and place it into the guide groove. The pushing mechanism is located in the guide groove and is configured to push the nut upward along the guide groove to assemble with the second keycap inserted into the keyhole.

[0034] In one embodiment, the button bracket is disposed on the outer periphery of the button mounting hole on the watch case, and the fastener is a screw;

[0035] The fastener mounting device includes a screw mounting device, which includes a second flipping mechanism, a watch case fixing fixture, and a screw feeding mechanism. The second flipping mechanism is configured to receive the watch case and convey it to the watch case fixing fixture. The watch case fixing fixture is configured to switch the watch case to a screw feeding position. The screw feeding mechanism is configured to assemble the screws onto the watch case in the feeding position so that the button bracket is assembled with the second keycap.

[0036] The present invention also provides a wristband device assembly bus, the wristband device assembly bus including the watch case assembly line as described above.

[0037] In this invention, the watch case assembly line, by employing a combination of at least one first assembly module, at least one second assembly module, and a conveying module, solves the problems of low efficiency and fluctuating yield rates in the manual assembly of smartwatch cases and buttons. Specifically, the first assembly module sequentially assembles the first keycap and retaining spring into the button mounting holes of the watch case, completing the installation of the first button assembly; the second assembly module assembles the button bracket, fasteners, and second keycap into the button mounting holes of the watch case, completing 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, avoiding human errors such as uneven force and positioning deviations in manual operation, reducing the generation of defective products due to insufficient assembly precision, and improving the yield rate fluctuation problem. Furthermore, the conveyor module 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. It also enables the transfer of the watch case between at least one first assembly module and at least one second assembly module, forming a continuous chain-like or cross-type assembly process. This avoids process stoppages caused by manual transfer and further improves the overall production line's pace. In summary, the watch case assembly line provided in this application can effectively replace manual assembly, significantly improving assembly efficiency to meet the demands of large-scale mass production, while ensuring assembly accuracy and stabilizing product yield by reducing human intervention. Attached Figure Description

[0038] 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.

[0039] Figure 1 A structural layout diagram of an embodiment of the first assembly module provided by the present invention;

[0040] Figure 2 A schematic diagram of the structure of an embodiment of the dial adjustment device provided by the present invention in a first state;

[0041] Figure 3 A schematic diagram of the structure of an embodiment of the dial adjustment device provided by the present invention in a second state;

[0042] Figure 4 This is a schematic diagram of a structure of an embodiment of the keycap mounting device provided by the present invention;

[0043] Figure 5 A schematic diagram of an embodiment of the snap ring pushing mechanism provided by the present invention;

[0044] Figure 6 This is a schematic diagram of a structure of an embodiment of the material-taking needle mechanism provided by the present invention;

[0045] Figure 7 A structural layout diagram of an embodiment of the spring vibration mechanism provided by the present invention;

[0046] Figure 8 A schematic diagram of the structure of an embodiment of the power tube installation device provided by the present invention;

[0047] Figure 9 A schematic diagram of the structure of an embodiment of the turntable provided by the present invention;

[0048] Figure 10 A schematic diagram of the structure of an embodiment of the screw mounting device provided by the present invention;

[0049] Figure 11 A schematic diagram of an embodiment of the second flipping mechanism provided by the present invention;

[0050] Figure 12 This is a schematic diagram of an embodiment of the screw feeding mechanism provided by the present invention;

[0051] Figure 13 This is a module layout diagram of an embodiment of the watch case assembly line provided by the present invention.

[0052] Explanation of icon numbers:

[0053] 1000. Watch case assembly line; 10. Base; 11. First assembly module; 111. Dial adjustment device; 1111. First flipping mechanism; 1112. First rotating clamping mechanism; 1113. First rotating shaft; 1114. Fixed bracket; 1115. Turntable; 1116. Guide groove; 112. Keycap mounting device; 1121. Pushing mechanism; 1122. Key pickup mechanism; 1123. Key support; 1124. Guide component; 113. Snap ring mounting device; 1131. Pushing mechanism; 1132. Snap ring chuck; 114. Spring feeding device; 11 41. Vibration platform; 1142. Feeding mechanism; 1142a. Fixing sleeve; 1142b. Picking pin; 115. Snap ring hopper; 12. Second assembly module; 121. Screw mounting device; 1211. Second flipping mechanism; 1211a. Flipping part; 1211b. Locking part; 1211c. Second rotating shaft; 1211d. Second fixing part; 122. Case fixing fixture; 123. Screw feeding mechanism; 124. Bar tube mounting device; 1241. Vacuum nozzle; 125. Pushing mechanism; 13. Conveying module; 14. Feeding module; 15. Unloading module.

[0054] 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

[0055] 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.

[0056] 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.

[0057] 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.

[0058] The present invention provides a watch case assembly line 1000 for mounting at least one first button assembly and at least one second button assembly to the watch case respectively. The first button assembly includes at least a first keycap and a retaining spring, and the second button assembly includes at least a second keycap, a button bracket and a fastener. The watch case has at least two button mounting holes.

[0059] Please see Figure 13 In one embodiment, the case assembly line includes:

[0060] Base 10;

[0061] At least one first assembly module 11 is disposed on the base 10, and the first assembly module 11 is configured to assemble the first keycap and the retaining spring of the first key assembly to a key mounting hole of the case.

[0062] At least one second assembly module 12 is disposed on the base 10, the second assembly module 12 being configured to assemble a key bracket, fasteners, and a second keycap to another key mounting hole in the watch case; and

[0063] A conveying module, located on the base 10, is configured to convey the watch case between at least one first assembly module 11 and at least one second assembly module 12.

[0064] It should be noted that the base 10 is the basic support structure of the entire watch case assembly line 1000. 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.

[0065] The first assembly module 11 is primarily responsible for assembling the first keycap and retaining spring 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 11 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 and retaining spring, ensuring stable grasping. For example, the automated feeding device includes two independent vibratory feeders or hoppers, used to transport the first keycap and retaining spring, respectively. The vibratory feeders arrange and transport the components in an orderly manner to designated picking positions through vibration. The robotic arm sequentially grasps components from the picking positions of each vibratory feeder according to a preset program and accurately assembles them into the button mounting holes of the watch case. For example, the first keycap is first grasped, placed into the keycap mounting hole, and preliminarily positioned. Then, the retaining ring is grasped and installed in the designated position, completing the assembly of the first keycap assembly. In another embodiment, the first assembly module 11 adopts a turntable 1115 type assembly structure. In this case, the first module includes a rotatable circular turntable 1115 with multiple stations evenly distributed on it. Each station corresponds to a fixing fixture for a watch case to be assembled. Around the turntable 1115, multiple assembly workstations are arranged to handle the assembly of the first keycap and retaining ring, respectively. As the turntable 1115 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 keycap mounting hole of the watch case. Next, at the retaining ring assembly workstation, a pneumatic gripper picks up the retaining ring from the retaining ring tray and installs it into the corresponding position on the watch case.

[0066] The second assembly module 12 is responsible for assembling the mounting bracket, fasteners, and second keycaps onto the watch case. 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 is mounted on the base 10, and an assembly platform that can slide along the rails is provided on the rails. Multiple assembly mechanisms with different functions are mounted on the assembly platform, including a mounting bracket installation mechanism, a fastener tightening mechanism, and a second keycap installation mechanism. The mounting bracket installation mechanism uses a pneumatic gripper in conjunction with a linear module. The pneumatic gripper picks up the mounting bracket from the bracket hopper and then the linear module accurately inserts the mounting bracket into the keycap mounting hole of the watch case. 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 mounting bracket. The fastener tightening mechanism uses an electric screwdriver. After the second keycap is installed, the electric screwdriver picks up a fastener from the fastener 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 12 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 mounting bracket, fasteners, and second keycaps. During the mounting bracket assembly stage, the collaborative robot uses a special tool on its end effector to pick up the mounting bracket from the mounting bracket rack and, based on information from the vision system, accurately inserts the mounting bracket into the keycap mounting hole 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 mounting bracket. For fastener installation, the collaborative robot first picks up the fastener from the fastener feeder and then uses a torque sensor to precisely control the fastener tightening process, ensuring that the tightening torque meets standard requirements.

[0067] Of course, in other embodiments, the key bracket can also be pre-installed on the watch case manually, and then the installation of the second keycap and fasteners can be completed using automated equipment.

[0068] The conveying module 13 can be a belt conveyor consisting of a motor, drive roller, rubber conveyor belt, etc. 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 13 can also be a chain conveyor or a pneumatic slide conveyor. Regardless of the implementation, as long as the watch case can be stably carried from the loading module 14 and transferred from the watch case hopper, and accurately moved between multiple assembly modules, and finally conveyed to the unloading module 15, the conveying module 13 must meet the automation control requirements of the assembly line (such as coordinated start / stop with the modules, and positioning accuracy adapted to assembly requirements). All of these fall within the protection scope of the conveying module 13 in this watch case assembly line 1000 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.

[0069] In addition, the watch case assembly line 1000 can adopt two methods: parallel feeding of conveyor modules or serial feeding. When parallel feeding of conveyor modules is adopted, multiple assembly modules operate synchronously. For example, at least one first assembly module 11 and at least one second assembly module 12 are respectively located on both sides of the conveyor module, and the feed ends of both are precisely connected to the corresponding discharge ports of the conveyor module. When serial feeding of conveyor modules is adopted, multiple assembly modules operate sequentially. At this time, the conveyor modules are arranged linearly along the base 10. The watch case is first conveyed to the first assembly module 11 or the second assembly module 12 located at the upstream starting position of the conveyor module. After the first button component or the second button component is assembled, it is then transferred by the conveyor module to multiple second assembly modules 12 or multiple first assembly modules 11 located downstream. A buffer area can be provided in the middle of two adjacent assembly modules to buffer the difference in process rhythm between the two assembly modules.

[0070] In this technical solution, the watch case assembly line 1000 provided by the present invention, by employing a combination of at least one first assembly module 11, at least one second assembly module 12, and a conveying module, 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 11 can sequentially assemble the first keycap and retaining spring into the button mounting hole of the watch case to complete the installation of the first button component; the second assembly module 12 can assemble the button bracket, fastener, and second keycap into the button mounting hole of the watch case to complete the installation of the second button component. The entire process requires no manual operation and is automatically completed by each module and the conveying module, 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 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. It also enables the watch case to move between at least one first assembly module 11 and at least one second assembly module 12, forming a continuous chain-like or cross-type assembly process. This avoids process delays caused by manual transfer and further improves the overall production line's pace. In summary, the watch case assembly line 1000 provided in this application can effectively replace manual assembly, significantly improving assembly efficiency to meet the demands of large-scale mass production, while ensuring assembly accuracy and stabilizing product yield by reducing human intervention.

[0071] Additionally, it should be noted that the first button assembly is primarily designed for button installation requirements on watch cases that demand high assembly precision and have a relatively simple structure. The component composition and assembly logic of its two structural schemes are as follows: First, Scheme A (round button + spring retainer structure): In this scheme, the core functional components of the first button assembly are the round button and the spring retainer. The round button directly serves as the first keycap, undertaking both the button's pressing operation and aesthetic decoration functions. The round button is made of ABS engineering plastic, and its outer contour matches the first button hole on the watch case. The inner side of the button has an annular groove for engaging with the spring retainer. The spring retainer is a stainless steel annular structure with an inner diameter matching the diameter of the round button's groove. After the round button is assembled onto the watch case, it engages between the inner wall of the watch case and the round button's groove, preventing the round button from detaching from the watch case and ensuring the stability of the button assembly. Second, Scheme B (square button + spring + spring retainer structure): This scheme is designed for button scenarios requiring a rebound function. The first button assembly consists of a square button, a spring, and a spring retainer, with the square button and spring combining to form the first keycap. The square button is made of PC+ABS alloy and is square in shape, matching the square first button hole on the watch case. The bottom of the button has a spring mounting groove. The spring is a stainless steel compression spring, with one end embedded in the spring mounting groove of the square button and the other end abutting against the limiting structure inside the watch case after assembly, providing the button with the pressing and rebound force. The structure of the retaining spring is the same as that of scheme A. After the square button and spring assembly is assembled to the watch case, it engages at the connection between the watch case and the square button, realizing the axial fixation of the assembly and preventing the button from detaching from the watch case during the rebound process.

[0072] The second button assembly is mainly adapted to the installation requirements of buttons on the watch case that need to have complex functions (such as signal transmission and multi-level adjustment). It requires a rigid connection between components through a bracket and fasteners. The component composition and assembly logic of its two structural schemes are as follows: First, Scheme C (bar tube + nut + round button structure): In this scheme, the second button assembly consists of a bar tube, a nut, and a round button. The bar tube, as the button bracket, is made of brass and has a hollow structure (for passing signal wires). One end has an external thread that can mate with the threaded inner wall of the button mounting hole in the watch case, and the other end has a stepped structure for installing the round button. The nut, as the fastener, is a stainless steel hexagonal nut. The external thread of the round button is adapted for this fastener. After the bar tube is inserted into the button hole in the watch case, the nut is tightened from the outside of the watch case to lock and fix it to the round button. The round button, as the second keycap, has the same structure as the round button in Scheme A. It is assembled on the stepped structure of the bar tube and can slide along the axial direction of the bar tube to realize the button pressing operation. Secondly, Option D (a square button with a spring + screw + mounting bracket structure) is designed for button scenarios requiring multiple components to be fixed together. The second button assembly consists of a square button with a spring, a screw, and a mounting bracket. The functions of each component are as follows: The square button with a spring serves as the second keycap, and its structure is consistent with the "square button + spring" combination in Option B. The square button integrates a spring on its inner side, providing a press-and-rebound function. The mounting bracket serves as the button support, made of aluminum alloy, and has mounting holes for fixing to the watch case and guide grooves 1116 that mate with the square button, providing sliding guidance and structural support for the square button. The screw serves as the fastener, a stainless steel Phillips head screw, which fixes the mounting bracket to the inside of the watch case by passing through the mounting holes of the mounting bracket and the threaded holes of the watch case. At the same time, the tightness of the screw can be adjusted to adjust the fit between the mounting bracket and the watch case, ensuring smooth sliding of the square button.

[0073] By selecting different numbers of the first assembly module 11 and / or the second assembly module 12, and coordinating with the path adjustment of the conveying module, different combination production lines can be formed to accommodate two buttons (such as A button + C button), three buttons (such as 2 A buttons + 1 C button or 1 B button + 2 D buttons), four buttons (such as 1 A button, 1 B button + 1 C button and 1 D button), or more than four buttons, thus completing the assembly of the corresponding number and type of button components on the watch case.

[0074] Please see Figure 2 and Figure 3 In one embodiment, both the first assembly module 11 and the second assembly module 12 include:

[0075] Dial adjustment device 111, configured to pick up a watch case located on a transport module and adjust the watch case to an assembled position having at least one button mounting hole exposed; and

[0076] Keycap mounting device 112, configured to pick up a first keycap from the keycap magazine and insert the first keycap into a keycap mounting hole in the watch case in an assembled state, in a predetermined posture; and

[0077] The retaining ring mounting device 113 is configured to pick up retaining rings from the retaining ring hopper 115 and mount them to engage with the dial and keycaps.

[0078] It should be noted that the dial adjustment device 111 and keycap installation are compatible with the assembly of the above four different types of keys.

[0079] The dial adjustment device 111 can be a multi-axis robotic arm with vision positioning. The pneumatic gripper at the end of the robotic arm (with silicone anti-slip pads and automatic spacing adjustment) positions the dial case using dual industrial cameras, grips it, and rotates it until the button mounting holes are exposed. Alternatively, the first dial adjustment can 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 button mounting holes. This is suitable for the large-scale production of standardized round dial cases, with fast adjustment and low maintenance costs.

[0080] The keycap mounting device 112 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 pre-installed spring, it is inserted into the key mounting hole of the watch case according to the set pressure; or, the keycap mounting device 112 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 mounting hole of the watch case for positioning, and finally the pneumatic slide pushes the first keycap into the key mounting hole of the watch case.

[0081] The snap ring mounting device 113 can be set at the downstream station of the keycap mounting device 112 on the base 10, and is used in conjunction with the snap ring hopper 115 (vibration feeding type, which can output snap rings in a preset posture). Its core function is to automatically pick up the snap rings in the snap ring hopper 115 and accurately install them to the position where they engage with the dial and keycaps, thereby fixing the button assembly to the dial case. The device includes a snap ring gripping mechanism, a linear push module, and a snap-fit ​​detection module. The snap ring gripping mechanism uses two symmetrically arranged elastic grippers with arc-shaped grooves on their inner sides that match the outer contour of the snap ring, providing uniform gripping force from both sides of the snap ring and preventing deformation during gripping. The root of the gripper is connected to a miniature pneumatic cylinder, which drives the gripper to open and close synchronously, realizing the gripping and release of the snap ring. The linear push module includes a servo-driven slide and a push cylinder. The servo-driven slide is set along the snap ring hopper 115 to the watch case assembly position, which can drive the snap ring gripping mechanism to move precisely to the side of the watch case. The push cylinder is installed on the slide block, and its piston rod is connected to the gripping mechanism, which can drive the gripper to push towards the snap-fit ​​position of the dial and keycap, snapping the snap ring into the preset slot.

[0082] In this embodiment, the dial adjustment device 111 first picks up the horizontally conveyed watch case and flips it to the assembly position (with the opening facing up or down) so that the button mounting holes always face the assembly direction; then the button mounting device pushes the keycaps into the corresponding button mounting holes, and finally the snap ring mounting device 113 pushes the snap ring in to complete the installation.

[0083] Please see Figure 2 and Figure 3 In one embodiment, the casing located in the conveying module is in a horizontal transport posture; the assembly posture is a vertical assembly posture.

[0084] The dial adjustment device 111 includes a first flipping mechanism 1111 and a first rotating clamping mechanism 1112 disposed on the first flipping mechanism 1111. The first flipping mechanism 1111 is disposed on the base 10 and can switch between a picking posture and an installation posture. The first rotating clamping mechanism 1112 is configured to pick up the watch case located on the conveying module and drive the watch case to rotate around its circumference. When the first flipping mechanism 1111 is in the picking posture, the first flipping mechanism 1111 can pick up the watch case located on the conveying module. When the first flipping mechanism 1111 is in the installation posture, the first rotating clamping mechanism 1112 can drive the dial to rotate to a vertical assembly posture.

[0085] It should be noted that the structure of the first flipping mechanism 1111 can be a fixed bracket 1114, a first rotating shaft 1113, and a drive assembly. Specifically, the fixed bracket 1114 is rigidly connected to the base 10 via bolts to ensure stable operation. The first rotating shaft 1113 is horizontally inserted through the top of the fixed bracket 1114, with its end connected to a drive assembly (such as a servo motor + gearbox or a pneumatic motor) to provide power for the flipping. The middle of the first rotating shaft 1113 is fixedly connected to the mounting seat of the first rotary clamping mechanism 1112, enabling the transmission of the flipping action to the clamping mechanism. Simultaneously, when the first flipping mechanism 1111 is in the picking posture, the clamping end of the first rotary clamping mechanism 1112 is flush with the watch case transport surface of the conveying module, facilitating horizontal picking of the watch case. In the installation posture, the first rotating shaft 1113 drives the first rotary clamping mechanism 1112 to flip, changing the clamped watch case from a horizontal to a vertical state. Furthermore, the flipping stroke can be precisely controlled by limit sensors (such as photoelectric limiters or mechanical limiters) to prevent over-flipping or under-flipping.

[0086] The first rotary clamping mechanism 1112 is typically mounted on the first rotating shaft 1113 of the first flipping mechanism 1111, and consists of a clamping assembly and a rotary drive. The clamping assembly can use pneumatic grippers (equipped with silicone anti-slip pads to prevent damage to the watch case), and the gripper opening can be adjusted according to the watch case size via cylinder stroke. The rotary drive (such as a stepper motor) is embedded in the mounting base of the clamping assembly, and its output shaft is connected to the gripper seat of the clamping assembly, which can drive the grippers and the clamped watch case to rotate circumferentially. In the working chamber, in the picking posture, the grippers close to pick up the horizontal watch case on the conveying module; after the first flipping mechanism 1111 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 button mounting hole) or mechanical positioning (such as the watch case edge positioning pin), the button mounting hole is made to face downwards precisely, completing the adjustment of the vertical assembly posture.

[0087] In this embodiment, the conveying module keeps the watch case in a horizontal transport posture; the first flipping mechanism 1111 can pick up the watch case in a horizontal transport posture when in the picking posture, and the first flipping mechanism 1111 can flip the watch case as a whole by 90° to a vertical assembly posture when in the installation posture. At the same time, the first rotating clamping mechanism 1112 drives the watch case to rotate circumferentially, so that the button mounting hole faces down or up; after the button picking mechanism 1122 picks up the first keycap or the second keycap from the hopper, the pushing mechanism 1121 pushes the first keycap directly into the button mounting hole from bottom to top or from top to bottom.

[0088] Please see Figure 4In one embodiment, the watch case located in the conveying module is in a horizontal transport posture; the assembly posture is a vertical assembly posture; the keycap mounting device 112 includes a pushing mechanism 1121 and a key picking mechanism 1122. The key picking mechanism 1122 is configured to pick up a first keycap from the key hopper, and the pushing mechanism 1121 is configured to drive the key picking mechanism 1122 to move upward or downward to press the picked-up first keycap into the corresponding key mounting hole of the watch case located on the dial adjustment device 111.

[0089] It should be noted that the key picking mechanism 1122 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 or second 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 or second 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 by visual calibration (such as a camera recognizing the keycap mounting hole position) and placed on the pushing mechanism 1121 to prepare for subsequent spring assembly and top mounting.

[0090] The pushing mechanism 1121 includes a lifting drive and a carrying workpiece. The carrying workpiece has a movable button carrier 1123. The button carrier 1123 is connected to the lifting end of the lifting drive. The button carrier 1123 is configured to limit the button. The lifting drive is configured to drive the button carrier 1123 upward so that the button located on the button carrier 1123 can be inserted into the button hole in the vertical assembly posture.

[0091] It should be noted that the lifting drive is the core component that provides stable lifting power for the button carrier 1123, directly determining the smoothness and accuracy of the button insertion process. The lifting drive can use a servo electric cylinder as the power source, guided by the guide component 1124. The cylinder body is fixed to the preset mounting plane of the base 10 by bolt assembly. The mounting plane is precision milled to ensure that the cylinder axis is completely coaxial with the button hole axis in the vertical assembly posture of the watch case, avoiding button insertion deviation due to installation misalignment of the drive component. The lifting end of the drive component (i.e., the top of the piston rod of the electric cylinder) is equipped with a flange connecting plate. The surface of the connecting plate has positioning pin holes and threaded holes. It is rigidly fixed to the bottom of the button carrier 1123 through a double connection of positioning pins and bolts, ensuring that the piston rod can synchronously drive the button carrier 1123 to rise and fall smoothly when it extends and retracts.

[0092] The workpiece carrier is used to place and limit the buttons. The movable button carrier 1123 realizes the posture constraint and synchronous lifting of the buttons. The entire supporting workpiece can be a metal frame structure, including a fixed base and a movable key support 1123. The fixed base is fixedly connected to the side of the cylinder of the lifting drive component, providing a lifting guide foundation for the key support 1123. The key support 1123 is a groove-type structure adapted to the shape of the key (such as a circular or square groove), preventing the keycap from shifting horizontally or rotating during lifting, while not obstructing the insertion end of the keycap, ensuring that the keycap can be smoothly inserted into the key hole of the watch case. The flexible rubber pad has a certain degree of elasticity and support, which can avoid surface scratches caused by direct contact between the metal support component and the keycap. At the same time, it can slightly buffer the impact force when the keycap is inserted, protecting the surface coating of the keycap. The bottom of the key support 1123 is equipped with a guide slider, which slides in cooperation with the vertical guide rail on the fixed base. The guide rail adopts a precision linear guide rail, combined with a ball retainer, so that the frictional resistance of the key support 1123 during lifting is extremely small, ensuring that it can move smoothly in the vertical direction under the action of the lifting drive component without jamming or tilting.

[0093] In this embodiment, the key picking mechanism 1122 horizontally picks up the first keycap from the hopper; the pushing mechanism 1121 rises or falls vertically to press the first keycap into the key mounting hole.

[0094] Please see Figure 5 In one embodiment, the first assembly module 11 further includes a snap ring mounting device 113, which includes:

[0095] Snap ring collet 1132, snap ring collet 1132 is configured to grip snap rings; and

[0096] A drive mechanism 1131 is configured to drive the snap ring chuck 1132 toward the watch case to assemble the snap ring located on the snap ring chuck 1132 with the first keycap and the watch case.

[0097] It should be noted that the snap ring mounting device 113 is adapted for the assembly of buttons A and B. The snap ring chuck 1132 is designed to fit the ring or irregular shape of the snap ring. It typically uses two symmetrically arranged elastic clamping arms. The elastic clamping arms are made of high-elasticity alloy (such as spring steel) or high-hardness engineering plastic, combining elasticity and wear resistance. They can achieve natural deformation and reset during clamping and releasing, avoiding fatigue failure after long-term use. The inner side of the clamping arms has an arc-shaped groove (for ring snap rings) or an irregular groove (for irregular 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, pushing the clamping arms to open outward to catch the snap ring. After the drive is removed, the clamping arms reset and close by their own elasticity, firmly clamping the snap ring and preventing it from falling off. Meanwhile, the snap ring chuck 1132 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).

[0098] The structure of the pushing mechanism 1131 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 1131. The guide rail slider is connected to the base 10, ensuring that the pushing mechanism 1131 moves the snap ring chuck 1132 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 1131 needs to be coordinated with the dial adjustment device 111 and the keycap mounting device 112 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 1132 can accurately push the snap ring to the assembly position.

[0099] In this embodiment, the clamping direction of the two elastic arms of the snap ring chuck 1132 and the moving direction of the pushing mechanism 1131 must 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 them with the snap ring grooves. The travel distance of the pushing mechanism 1131 needs to be set according to the distance between the watch case and the snap ring storage 115 to ensure that the snap ring can be accurately pushed from the storage 115 to the assembly position. Simultaneously, the timing of the snap ring mounting device 113 must be synchronized with the keycap mounting device 112. That is, the control system only triggers the snap ring mounting device 113 to start after the keycap mounting device 112 has completed the keycap mounting and confirmed that it is in place, ensuring the complete assembly of the first key assembly. 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 113 and other devices in the first assembly module 11, achieving automation and precision in the overall assembly process.

[0100] Please see Figure 6 and Figure 7 In one embodiment, the first keycap includes a cap body and two springs disposed on the cap body; the first assembly module 11 further includes a spring feeding device 114, the spring feeding device 114 comprising:

[0101] Vibration platform 1141, the vibration platform 1141 is provided with at least one limiting hole, during vibration, the spring can be limited in the limiting hole and maintain a vertical posture; and

[0102] The feeding mechanism 1142 includes a robot arm, a fixed sleeve 1142a, and a picking needle 1142b. The robot arm is located on the base 10, the fixed sleeve 1142a is located at the gripping end of the robot arm, and the picking needle 1142b is telescopically inserted into the sleeve. The picking needle 1142b is configured to pick up a spring located in a limiting hole.

[0103] The feeding mechanism 1142 has a feeding state and a retraction state. In the feeding state, the feeding needle 1142b is interference-fitted with the spring in the vertical position. In the retraction state, the feeding needle 1142b retracts into the fixed sleeve 1142a so that the spring can fall into the mounting hole of the cap body in the horizontal position under the abutment of the fixed sleeve 1142a.

[0104] It should be noted that the spring feeding device 114 is compatible with the assembly of the button in Scheme B. The vibration platform 1141 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 compatible with 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 shaking), 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 picking. 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.

[0105] 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 1141 and the keycap mounting device 112) 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 limiting hole and the first keycap mounting hole. A fixed sleeve 1142a, 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 pin 1142b (ensuring smooth extension and retraction of the pin). The bottom of the sleeve has a flat end face, used to abut against the spring top during material unloading. The axis of the sleeve must be coaxial with the movement axis of the robotic arm, and during installation, the relative position of the bottom of the sleeve and the bottom of the material handling pin 1142b must be fixed. The picking needle 1142b is telescopically inserted into the fixed sleeve 1142a and consists of a needle body and a telescopic drive component. The needle body is made of high-strength metal, and the tip is polished smooth. The diameter of the needle body must be compatible with 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 1142a, and the output end is connected to the top of the picking needle 1142b. It can drive the picking needle 1142b 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).

[0106] In this embodiment, when loading springs, a batch of springs are first poured into the carrier plate of the vibration platform 1141. 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 1142a and the picking needle 1142b to above the vibration platform 1141, and adjusts the height so that the picking needle 1142b is aligned with the vertically positioned spring. The telescopic drive drives the picking needle 1142b to extend downward, and the needle tip inserts into the inner hole of the spring. Due to the interference fit between the picking needle 1142b and the spring, the spring is firmly clamped on the picking needle 1142b. Then the robot arm moves the picking needle 1142b and the spring away from the vibration platform 1141 and moves to above the keycap of the keycap mounting device 112 (at this time, the first keycap has been picked up by the key picking mechanism 1122 and is kept in a horizontal posture with the mounting hole facing upward). During spring assembly, the robot adjusts its height so that the bottom of the pick-up pin 1142b aligns with the mounting hole of the first keycap. The telescopic drive drives the pick-up pin 1142b to retract upwards, causing the spring to move into the fixed sleeve 1142a. When the top of the spring contacts the bottom end face of the fixed sleeve 1142a, the sleeve exerts a downward resisting force on the spring. As the pick-up pin 1142b continues to retract, the spring disengages from the pick-up pin 1142b under the resisting force and falls from the bottom of the pick-up pin 1142b into the mounting hole of the first keycap, completing the spring assembly. Finally, the robot drives the fixed sleeve 1142a and the pick-up pin 1142b to reset, ready for the next pick-up.

[0107] It is easy to see that the vibration platform 1141 causes the spring to automatically fall into the limiting hole through vibration. The diameter and depth of the limiting hole constrain the spring to maintain a vertical posture, avoiding the posture deviation of the spring when placed manually. Moreover, the action sequence of the feeding mechanism 1142 can be linked with the keycap installation device 112 (such as the feeding mechanism 1142 starting to feed immediately after the first keycap is in place), 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 11.

[0108] Please see Figure 8 In one embodiment, the second assembly module 12 includes:

[0109] Dial adjustment device 111 is configured to pick up a watch case located on a transport module and adjust the watch case to an assembled position with at least one button mounting hole exposed.

[0110] The keycap mounting device 112 is configured to pick up a second keycap from the keycap magazine and insert the second keycap into the keycap mounting hole of the case in the assembly position in a predetermined posture.

[0111] A bracket mounting device configured to pick up a button bracket from a bracket hopper and mount it onto the dial housing located on the dial adjustment device 111 in a predetermined orientation; and

[0112] A fastener mounting device is configured to pick up fasteners from a fastener hopper and drive the fasteners to be fastened to a second keycap and / or key support in a predetermined posture.

[0113] It should be noted that this embodiment is implemented for the C and D buttons. The specific structure of the dial adjustment device 111 can be referred to the previous description, and the specific structure of the keycap mounting device 112 can be implemented with reference to the keycap mounting device 112 described above. However, it should be noted that in this embodiment, the key holes of the dial in the assembly posture are usually arranged facing upwards to accommodate the installation of the C and D buttons. Therefore, the keycap mounting device 112 is preferably a robotic arm with a keycap support 1123.

[0114] Fastener mounting devices typically include keycap picking components (such as grippers / suction cups adapted to the shape of the second keycap) and lifting drive components (such as servo cylinders fixed to the base 10); they can pick up the second keycap from the keycap hopper and drive the keycap to be inserted into the keycap mounting hole of the pre-installed keycap bracket in a predetermined posture (such as the buckle aligning with the watch case slot), thus achieving initial keycap positioning.

[0115] The bracket mounting device mainly includes a button bracket pickup component, an attitude calibration component, and a positioning and moving component. The button bracket pickup component can use a pneumatic gripper (the gripper opening can be adjusted according to the outer diameter of the button bracket, and the silicone pad increases friction and prevents scratches) or a vacuum nozzle 1241 adapted to the inner diameter of the button bracket (adsorbing the inner wall of the button bracket through negative pressure to avoid damaging the outer wall). The attitude calibration component is used to adjust the picked-up button bracket to a "predetermined attitude" (i.e., the axis of the button bracket is coaxial with the axis of the button mounting hole on the case, ensuring 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 button bracket (such as the chamfer and positioning holes at the ends of the button bracket) 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 button bracket to rotate around its own axis. The angle is adjusted according to the visual positioning result until the attitude of the button bracket 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 button bracket to move precisely to the button mounting hole on 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 material picking position of the bracket hopper → attitude calibration position → button mounting hole insertion position on the watch case", requiring no manual intervention throughout the process.

[0116] In this embodiment, the dial adjustment device 111 picks up the watch case from the conveyor module, flips it to an assembly position, exposing the button mounting holes and aligning them with the bracket mounting device. Then, the bracket mounting device picks up the button bracket from the hopper and inserts it into the button mounting hole of the watch case in a predetermined position. Next, the keycap mounting device 112 picks up the second keycap and drives it into the button mounting hole of the pre-installed button bracket, completing the initial assembly. Finally, the fastener mounting device picks up the fastener, aligns it with the threaded hole of the second keycap, and tightens the fastener to the keycap with a set torque. After assembly, the watch case is transferred from the conveyor module to the next stage.

[0117] In one embodiment, the casing located in the conveying module is in a horizontal transport posture; the assembly posture is a vertical assembly posture;

[0118] The dial adjustment device 111 includes a first flipping mechanism 1111 and a rotating clamping mechanism. The first flipping mechanism 1111 is disposed on the base 10 and can switch between a picking posture and an installation posture. The rotating clamping mechanism includes a turntable 1115 disposed on the first flipping mechanism 1111 and a gripper structure disposed on the turntable 1115. The gripper structure is configured to grip the watch case. The turntable 1115 is configured to drive the gripper structure to rotate around the circumference of the dial so that the dial is in a vertical assembly posture with the button holes facing upward.

[0119] When the first flipping mechanism 1111 is in the picking posture, it can pick up the watch case located on the conveying module; when the first flipping mechanism 1111 is in the installation posture, the rotating clamping mechanism can drive the dial to rotate to the vertical assembly posture so that the button hole faces upward.

[0120] It should be noted that the specific implementation of the first flipping mechanism 1111 can be carried out with reference to the above text.

[0121] Please see Figure 9 In one embodiment, the button support is a bar tube and the fastener is a nut; a guide groove 1116 for accommodating the nut is provided on the side of the dial with the claw structure.

[0122] The fastener installation device includes a nut feeding mechanism and a pushing mechanism 125. The nut feeding mechanism is configured to pick up nuts from the fastener hopper and push them into a guide groove 1116. The pushing mechanism 125 is located in the guide groove 1116 and is configured to push the nuts upward along the guide groove 1116 to assemble with a second keycap inserted into a keyhole.

[0123] It should be noted that this embodiment is implemented for the C button. The bracket mounting device is a bar tube mounting device 124, and the bar tube pickup assembly typically uses a silicone vacuum nozzle 1241. The rear end of the nozzle is connected to a vacuum generator via an air tube. The nozzle and the bracket hopper are correspondingly set, and a pushing mechanism is provided at the bottom of the hopper to push the bar tubes one by one to the nozzle pickup position, avoiding the bar tubes from stacking and getting stuck.

[0124] In this embodiment, the fastener installation device includes a nut feeding mechanism and a push mechanism 125. The shape of the guide groove 1116 matches the shape of the fastener (adapted to a hexagonal nut), that is, the inner wall is a hexagonal structure that fits the outer contour of the hexagonal nut (or slightly larger than the shape of the fastener to ensure that the fastener can slide smoothly without wobbling). The groove depth is slightly greater than the thickness of the fastener (so that the fastener is completely embedded in the groove to prevent it from falling off during sliding). The groove length needs to cover the distance from the "fastener placement position" to the "assembly position with the second keycap" (to ensure that the fastener can be pushed to the assembly point by the push mechanism 125) to ensure that the fastener can accurately align with the keycap after being pushed out of the groove. The push mechanism 125 includes a drive component, a push rod, and a limiting component. The drive component can be a miniature cylinder, an electric push rod, or a linear motor. One end of the push rod is fixed to the output end of the drive component, and the other end can extend into the guide groove 1116. The limiting component is installed at the end of the guide groove 1116 or on the push rod stroke path to control the push rod pushing distance and prevent over-pushing or under-pushing. The design must ensure that the push rod can smoothly extend into the slot to push the fastener, without interfering with the gripper structure, case, or other components.

[0125] Thus, the guide groove 1116 serves as a temporary holding space for fasteners. After the fastener feeding mechanism picks up the fasteners, they can be directly placed into the groove. The constraint of the groove prevents the fasteners from shifting or falling before assembly, replacing manual hand positioning and automating the pre-positioning of fasteners. When the pushing mechanism 125 pushes the nut, the guide groove 1116 provides a fixed sliding path for the nut, preventing the nut from tilting during the pushing process (especially for hexagonal nuts, to prevent them from shifting due to uneven force on the corners), ensuring that the nut moves accurately along the preset direction to align with the second keycap, solving the problem of uncontrollable nut pushing path by manual pushing. In addition, since the guide groove 1116 rotates synchronously with the turntable 1115 (because it is located on the turntable 1115), when the turntable 1115 drives the watch case to a vertical assembly posture, the guide groove 1116 also adjusts to the position that matches the second keycap, without the need for additional adjustment of the groove direction, achieving synchronous connection between watch case posture adjustment and nut path guidance, simplifying the device structure.

[0126] In other embodiments, the fastener installation device consists of a nut feeding assembly, a nut pickup assembly, and a nut fastening assembly. The nut feeding assembly typically includes a vibrating distribution plate and a linear conveying track. The inner wall of the vibrating distribution plate has a spirally rising distribution groove, the width of which matches the nut thickness, conveying the bulk nuts in the hopper one by one along the distribution groove to the track inlet. The linear conveying track conveys the nuts to the positioning groove at the end. The positioning groove has a hexagonal cross-section, perfectly matching the shape of the nut, ensuring that the nut maintains a predetermined posture of "hexagonal face aligned with the fastening direction" within the positioning groove, awaiting pickup. The nut pickup assembly uses a magnetic hexagonal sleeve made of tool steel. The sleeve has a hexagonal cavity on its inner wall that matches the nut. The sleeve connects to the fastening assembly via a quick-release interface, allowing for quick replacement to accommodate nuts of different sizes. The sleeve's pickup position corresponds to the positioning groove of the feeding assembly. When the nut reaches the positioning groove, the sleeve presses down to fit the nut, and the nut is attracted to the sleeve cavity under magnetic force, preventing it from falling off during movement. Nut fastening assemblies typically include a servo motor and a torque sensor. The output shaft of the servo motor is connected to a hexagonal sleeve via a coupling, which drives the sleeve to rotate the nut. In addition, the fastening assembly is also equipped with a linear drive unit, which can drive the sleeve and the motor to move axially, realizing the transfer of the nut from the pickup position to the fastening position.

[0127] Thus, only after the bracket mounting device completes the bar insertion and sends a "bar in place" signal, does the control system trigger the keycap mounting device 112 to assemble the keycaps. After the keycap mounting device 112 sends a "keycap in place" signal, the fastener mounting device initiates the feeding and fastening process, avoiding confusion in process connections. Simultaneously, both devices use the case key mounting holes on the dial adjustment device 111 as their positioning reference, and the relative positions of each device are calibrated using a visual positioning system, significantly improving overall assembly accuracy.

[0128] It should be noted that hexagonal nuts can be used as fasteners. Since the fasteners need to be locked to the second keycap, at least one of the fastener mounting device and the keycap mounting device 112 has a pick-up component with a rotation function.

[0129] In one embodiment, the fastener mounting device further includes a screw locking device configured to pick up a screw from the fastener hopper and lock the screw between the bar tube and the watch case to secure the bar tube to the watch case.

[0130] It should be noted that this embodiment is implemented for the C button. 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 arm, mounted on the base 10), and a locking drive component (such as a servo electric screwdriver with integrated torque control function). It can pick up screws 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 a set torque, thereby fixing the bar tube.

[0131] 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.

[0132] In one embodiment, the second assembly module 12 further includes a welding device configured to weld screws to a bar; and / or, the welding device is configured to weld fasteners and a second keycap.

[0133] It should be noted that this embodiment is implemented for the C key. The welding device typically includes a welding head (such as a laser welding head / resistance welding head, adapted for welding micro-components to avoid high-temperature damage to the watch case), a positioning adjustment component (such as a three-axis micro-adjustment slide, mounted on the base 10), and a temperature / power control module. When welding the screw to the bar, the positioning adjustment component 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 fastener to the second keycap, the positioning adjustment component moves the welding head to align with the contact edge between the fastener and the keycap, and welds them together using low-power welding (to avoid melting and deformation) to prevent the fastener from loosening; during the welding process, the control module monitors the temperature in real time to avoid overheating and damaging surrounding components.

[0134] Thus, through the automated process of "posture adjustment → bar tube insertion → screw fixing + welding → keycap installation → fastener locking + 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.

[0135] Please see Figure 10 , Figure 11 as well as Figure 12 In one embodiment, the button bracket is disposed on the outer periphery of the button mounting hole on the watch case, and the fastener is a screw; the fastener mounting device includes a screw mounting device 121, which includes a second flipping mechanism 1211, a watch case fixing fixture 122, and a screw feeding mechanism 123; the second flipping mechanism 1211 is configured to receive the watch case and convey it to the watch case fixing fixture 122, the watch case fixing fixture 122 is configured to switch the watch case to a screw feeding posture, and the screw feeding mechanism 123 is configured to assemble the screw to the button bracket for assembly with the second keycap.

[0136] It should be noted that this embodiment is implemented for the D button. The screw feeding mechanism 123 is responsible for the screening, feeding, and precise locking of screws, and can consist of screws, a feeding tube, and an electric screwdriver. Defective screws are screened by vibration, and qualified screws are sorted in a "head-forward" orientation and blown to the screwdriver bit through the feeding tube. The electric screwdriver fixes the screws by magnetic attraction, moves it to the front of the screw hole, and then advances it axially. When the tightening action is started, the torque sensor monitors the torque in real time. After reaching the set value, it automatically stops and rotates in the opposite direction for a preset number of turns. If the torque is abnormal, an alarm is triggered to ensure the screw locking quality.

[0137] After the watch case enters the second assembly module 12, the keycap mounting device 112 first picks up the watch case from the conveying module 13. By adjusting its posture, the keycap mounting hole is aligned with the lifting end of the pushing mechanism 1121. Then, the pushing mechanism 1121 inserts the second keycap into the keycap mounting hole at a set speed and force. After the keycap is inserted, the watch case is transferred to the screw mounting device 121 via the conveying module 13. The second flipping mechanism 1211 quickly picks up the watch case and flips it to a position suitable for screw loading, placing it into the watch case for fixation. Fixture 122 secures the watch case with multi-point clamping and positioning pins; then screw feeding mechanism 123 selects and feeds screws to electric screwdriver bits. After the screwdriver bits pick up the screws, they are aligned with the screw holes and the tightening action is started. Torque sensor monitors and ensures the locking quality. After the screw assembly is completed, watch case fixing fixture 122 releases the clamps, and second flipping mechanism 1211 sends the watch case back to conveying module 13 for transfer to the next stage. The entire process achieves automated and high-precision assembly of the second button through the precise cooperation of each mechanism.

[0138] In one embodiment of the second assembly module for the D key, the first flipping mechanism 1111 is further provided with a keycap abutment, which is configured to abut and limit the second keycap located in the case.

[0139] In this embodiment, the keycap abutment portion protrudes from the surface of the first flipping mechanism 1111. When the rotating clamping portion clamps the watch case, the keycap abutment portion can abut against and limit the second keycap located on the watch case. This is because when the watch case needs to be transferred from the keycap mounting device 112 to the screw feeding mechanism 123, in order to facilitate the stable flow of the watch case, the watch case needs to flow in a horizontal transport posture. However, the second keycap and the key bracket located on the watch case have not yet been locked by screws, and the watch case is in a vertical assembly posture. Therefore, the watch case needs to switch from the vertical assembly posture to the horizontal transport posture, that is... The first flipping mechanism 1111 rotates, and the second keycap is prone to shifting or falling off due to gravity or centrifugal force during the flipping process. Therefore, by setting a keycap abutment, the posture of the second keycap on the watch case can be constrained at all times, and the position of the second keycap relative to the key support can be avoided during the flipping process of the watch case. It can be understood that the keycap abutment can be a convex structure, which limits the second keycap through multi-point contact, or it can include multiple L-shaped limiting blocks so that part of the structure of the second keycap can be inserted into the keycap abutment. The shape of the keycap abutment is not limited.

[0140] Please see Figure 11 Furthermore, in one embodiment, the second flipping mechanism 1211 includes a flipping part 1211a and a locking part 1211b, with the locking part 1211b disposed on the flipping part 1211a;

[0141] The flipping part 1211a is used to flip the watch case so that the watch case can be switched from a horizontal transport posture to a vertical assembly posture. The locking part 1211b has at least two locking members that can approach and move away from each other. Each locking member is configured to abut against the inner circumferential surface of the watch case and offset the second keycap and key support.

[0142] In this embodiment, the second flipping mechanism 1211 includes a second fixing part 1211d, a second rotating shaft 1211c, a flipping part 1211a, a locking part 1211b, and a driving component. The second fixing part 1211d provides a fixed foundation for other components of the second flipping mechanism 1211 and can also fix the conveying module 13, thereby realizing the transfer of the watch case between different workstations. Specifically, the second fixing part 1211d can be assembled from multiple sheet metal parts or be a separate component, which can be connected to different structures by opening slots, holes, protrusions, etc. The second fixing part 1211d is provided with a shaft hole, and the second rotating shaft 1211c is inserted into the shaft hole of the second fixing part 1211d. The locking part 1211b is connected to the second rotating shaft 1211c. When the driving component is running, the second rotating shaft 1211c drives the flipping part 1211a to flip, so that the watch case switches from a horizontal transport posture to a vertical assembly posture.

[0143] The locking part 1211b includes four locking members, which are spaced apart along the circumference. This creates a multi-point clamping area and a uniform clamping force when clamping the watch case. Specifically, two aligned locking members are inserted into the hollow area of ​​the watch case to abut against the inner circumferential surface of the watch case, while the other two aligned locking members are shorter in length to abut against the inner end face of the watch case. Thus, the multiple spaced locking members can completely avoid the first keycap, the second keycap, and the button bracket, preventing changes in the posture of the pre-assembled parts. It is understandable that in the subsequent screw-driving process, it is necessary to ensure the positional accuracy between the screw holes on the watch case and the bit of the screw feeding mechanism 123. Therefore, after the watch case is transported to the watch case fixing fixture 122, a high-precision posture fine-tuning is required. For the second flipping mechanism 1211, it is only necessary to ensure that the watch case can be placed in the watch case fixing fixture 122.

[0144] Furthermore, in one embodiment, the watch case fixing fixture 122 includes a watch case support member and a watch case locking part, and a watch case locking assembly is disposed on the watch case support member; the watch case locking part has at least two locking members that can approach and move away from each other, each locking member is configured to abut against and limit the watch case and offset the second keycap and key support; the watch case locking assembly is configured to switch the watch case from a vertical assembly posture to a screw loading posture.

[0145] In this embodiment, the watch case support can adopt a planar support structure or a curved contour structure. For example, positioning pins or vacuum suction holes can be provided on the support surface to constrain the horizontal displacement of the watch case. The locking component can be a wedge block, a pneumatic gripper, or an electromagnetically driven slider. Its movement path forms an angle with the normal direction of the inner circumference of the watch case, for example, cutting into the inner wall of the watch case at a preset angle. Multi-point dynamic clamping is achieved through friction and structural limiting. The watch case locking assembly can integrate a linear module or a rotary cylinder. For example, a servo motor drives a lead screw mechanism to move the locking component a predetermined distance along a preset direction, thereby ensuring the watch case is locked on the watch case support.

[0146] After the watch case is placed on the case carrier, the case carrier can fix the bottom surface of the watch case by vacuum adsorption. Then, the two locking parts are moved away from each other by the driving components such as cylinders and motors, thus forming a clamping effect on the watch case. At the same time, during the movement of the locking part, there will be at least a period of contact with the watch case. Therefore, after the locking part moves into place, it can change the posture of the watch case on the case carrier, thereby forcing the watch case into the screw-loading posture.

[0147] In one embodiment, the screw mounting device 121 is provided with a case picking station and a case locking station, the second flipping mechanism 1211 is set corresponding to the case picking station, and the screw feeding mechanism 123 is set corresponding to the case locking station; the screw mounting device 121 has a case docking state, in which the locking part 1211b is directly opposite the locking surface of the case support member.

[0148] In this embodiment, the second flipping mechanism 1211 is set corresponding to the watch case picking station so that the watch case picking station receives the watch case located at the second flipping mechanism 1211, and the screw feeding mechanism 123 is set corresponding to the watch case locking station so as to perform the screwing process; during this process, the watch case fixing fixture 122 moves between the watch case picking station and the watch case locking station to realize the transfer of the watch case; wherein, when the watch case fixing fixture 122 receives the watch case from the second flipping mechanism 1211, the locking part 1211b of the second flipping mechanism 1211 is directly facing the locking surface of the watch case carrier, so that when the watch case is transferred, the watch case in the vertical assembly posture can be prevented from changing posture.

[0149] This invention also proposes a wristband device assembly bus, which includes all the watch case assembly lines 1000 described above. Specifically, the wristband device assembly bus includes watch case assembly lines 1000, display screen assembly lines, dial assembly lines, etc. By using an automated wristband device assembly bus, efficient and precise assembly can be achieved. The specific structure of the watch case assembly line 1000 is as described in the above embodiments. Since the wristband device assembly bus proposed in this invention adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0150] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A watch case assembly line body for mounting at least one first button assembly and at least one second button assembly to a watch case respectively, the first button assembly comprising at least a first button cap and a circlip, the second button assembly comprising at least a second button cap, a button support and a fastener, the watch case being provided with at least two button mounting holes; characterized in that, The watch case assembly line body comprises: a base; at least one first assembly module arranged on the base, the first assembly module being configured to assemble a first keycap of the first button assembly and the spring to a button mounting hole of the watch case; at least one second assembly module arranged on the base, the second assembly module being configured to assemble the button support, the fastener and the second keycap to another button mounting hole of the watch case; and a conveying module arranged on the base, the conveying module being configured to convey the watch case between at least one first assembly module and at least one second assembly module; The second assembly module comprises: a dial adjusting device configured to pick up the watch case on the conveying module and adjust the watch case to an assembly posture with at least one button mounting hole exposed; a keycap mounting device configured to pick up the second keycap in a button warehouse and insert the second keycap into the button mounting hole of the watch case in the assembly posture in a predetermined posture; a support mounting device configured to pick up the button support in a support warehouse and mount the button support to the watch case on the dial adjusting device in a predetermined posture; and a fastener mounting device configured to pick up the fastener in a fastener warehouse and drive the fastener to be fastened to the second keycap and / or the button support in a predetermined posture; The watch case on the conveying module is in a horizontal transportation posture; the assembly posture is a vertical assembly posture; The dial adjusting device comprises a first turnover mechanism and a rotating clamping mechanism, the first turnover mechanism is arranged on the base, the first turnover mechanism can switch the rotating clamping mechanism between a picking posture and a mounting posture, the rotating clamping mechanism comprises a turntable arranged on the first turnover mechanism and a jaw structure arranged on the turntable, the jaw structure is configured to grab the watch case; the turntable is configured to drive the jaw structure to rotate along the circumference of the dial, so that the dial is in the vertical assembly posture and the button hole is arranged upward; When the first turnover mechanism is in the picking posture, the first turnover mechanism can pick up the watch case on the conveying module; when the first turnover mechanism is in the mounting posture, the rotating clamping mechanism can drive the dial to rotate to the vertical assembly posture, so that the button hole is arranged upward.

2. The case assembly line body according to claim 1, wherein The first assembly module comprises: a dial adjusting device configured to pick up the watch case on the conveying module and adjust the watch case to an assembly posture with at least one button mounting hole exposed; a keycap mounting device configured to pick up the first keycap in a button warehouse and insert the first keycap into the button mounting hole of the watch case in the assembly posture in a predetermined posture; and The clasp mounting device is configured to pick up the clasp in the clasp warehouse and mount the clasp to the watchcase and the keycap.

3. The case assembly line body according to claim 2, wherein The watchcase at the conveying module is in a horizontal transportation posture; the assembly posture is a vertical assembly posture; The watch dial adjusting device comprises a first turnover mechanism and a first rotary clamping mechanism arranged on the first turnover mechanism, the first turnover mechanism is arranged on the base and can be switched between a picking posture and a mounting posture; the first rotary clamping mechanism is configured to pick up the watchcase at the conveying module and rotate the watchcase along its circumference; wherein, when the first turnover mechanism is in the picking posture, the first turnover mechanism can pick up the watchcase on the conveying module; when the first turnover mechanism is in the mounting posture, the first rotary clamping mechanism can drive the watch dial to rotate to the vertical assembly posture; and / or The keycap mounting device comprises a pushing mechanism and a key picking mechanism, the key picking mechanism is configured to pick up the first keycap from the key warehouse, and the pushing mechanism is configured to drive the key picking mechanism to move to press the picked first keycap into the corresponding key mounting hole of the watchcase on the watch dial adjusting device.

4. The case assembly line body according to claim 2, wherein The clasp mounting device comprises: A clasp chuck is configured to clamp the clasp; and A pushing mechanism is configured to drive the clasp chuck to move towards the watchcase to assemble the clasp on the clasp chuck with the first keycap and the watchcase.

5. The case assembly line body according to any one of claims 2 to 4, characterized in that, The first keycap comprises a cap body and two springs arranged on the cap body; the first assembly module further comprises a spring feeding device, the spring feeding device comprises: A vibrating platform is provided with at least one limiting hole, during vibration, the spring can be limited in the limiting hole and kept in a vertical posture; and A feeding mechanism comprises a manipulator, a fixed sleeve and a material taking needle, the manipulator is arranged on the base, the fixed sleeve is arranged on the grabbing end of the manipulator, and the material taking needle is telescopically inserted into the sleeve, the material taking needle is configured to pick up the spring in the limiting hole; Wherein, the feeding mechanism has a material taking state and a material returning state, in the material taking state, the material taking needle is in interference fit with the spring in a vertical posture; in the material returning state, the material taking needle is retracted in the fixed sleeve, so that the spring can fall into the mounting hole of the cap body in a horizontal posture under the abutment of the fixed sleeve.

6. The case assembly line body according to claim 1, wherein The key support is a bar pipe, the fastener is a nut; one side of the watch dial provided with the clamping jaw structure is provided with a guide groove for accommodating the nut; The fastener mounting device comprises a nut feeding mechanism and a pushing mechanism, the nut feeding mechanism is configured to pick up the nut in the nut warehouse to the guide groove; the pushing mechanism is arranged in the guide groove and is configured to push the nut upwards along the guide groove to assemble with the second keycap inserted into the key hole. The clasp mounting device is configured to pick up the clasp in the clasp warehouse and mount the clasp to the watchcase and the keycap. A clasp chuck is configured to clamp the clasp; and A pushing mechanism is configured to drive the clasp chuck to move towards the watchcase to assemble the clasp on the clasp chuck with the first keycap and the watchcase. The first keycap comprises a cap body and two springs arranged on the cap body; the first assembly module further comprises a spring feeding device, the spring feeding device comprises: A vibrating platform is provided with at least one limiting hole, during vibration, the spring can be limited in the limiting hole and kept in a vertical posture; and A feeding mechanism comprises a manipulator, a fixed sleeve and a material taking needle, the manipulator is arranged on the base, the fixed sleeve is arranged on the grabbing end of the manipulator, and the material taking needle is telescopically inserted into the sleeve, the material taking needle is configured to pick up the spring in the limiting hole; Wherein, the feeding mechanism has a material taking state and a material returning state, in the material taking state, the material taking needle is in interference fit with the spring in a vertical posture; in the material returning state, the material taking needle is retracted in the fixed sleeve, so that the spring can fall into the mounting hole of the cap body in a horizontal posture under the abutment of the fixed sleeve. The key support is a bar pipe, the fastener is a nut; one side of the watch dial provided with the clamping jaw structure is provided with a guide groove for accommodating the nut; The fastener mounting device comprises a nut feeding mechanism and a pushing mechanism, the nut feeding mechanism is configured to pick up the nut in the nut warehouse to the guide groove; the pushing mechanism is arranged in the guide groove and is configured to push the nut upwards along the guide groove to assemble with the second keycap inserted into the key hole.

7. The case assembly line body according to claim 1, wherein The key support is arranged at the periphery of the watch case at the key mounting hole, and the fastener is a screw; The fastener mounting device comprises a screw mounting device, the screw mounting device comprises a second turnover mechanism, a watch case fixing tool and a screw feeding mechanism; the second turnover mechanism is configured to receive the watch case and transport the watch case to the watch case fixing tool, the watch case fixing tool is configured to switch the watch case to a screw feeding posture, and the screw feeding mechanism is configured to assemble the screw to the watch case in the feeding posture, so that the key support is assembled with the second key cap.

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

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