Watch case assembly method and wristband device assembly bus

Abstract

This invention relates to the field of smart wearable device manufacturing technology, and particularly to a watch case assembly method and a wristband device assembly bus. The watch case assembly method includes controlling a first watch case flipping mechanism to drive the watch case into a first pre-assembly posture; controlling a lifting mechanism and a pushing mechanism to assemble a first button onto the watch case via a first mounting hole; controlling a second watch case flipping mechanism to drive the watch case into a second pre-assembly posture; and controlling a button lowering mechanism, a third watch case flipping mechanism, and a screw feeding mechanism to assemble a second button onto the watch case via a second mounting hole, so that the second button, button bracket, and watch case are in a limiting fit. The assembly of the first and second buttons is performed step-by-step. The main objective of this invention is to provide a watch case assembly method that aims to complete the assembly between the watch case and the button through an automated process, thereby improving product processing efficiency and yield.

Description

Technical Field

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

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

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

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

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

[0006] To achieve the above objectives, the watch case assembly method is used to assemble a watch case and a button assembly. The watch case includes a first mounting hole, a second mounting hole, and a button bracket. The button bracket is aligned with the second mounting hole. The button assembly includes a first button and a second button. A watch case assembly line is provided. The base of the watch case assembly line includes a first watch case flipping mechanism, a lifting mechanism, a retaining spring pushing mechanism, a second watch case flipping mechanism, a third watch case flipping mechanism, a button lowering mechanism, and a screw feeding mechanism. The watch case assembly method includes:

[0007] Control the first housing flipping mechanism to drive the watch case into the first pre-installed posture;

[0008] The lifting mechanism and the snap ring pushing mechanism are used to assemble the first button to the watch case via the first mounting hole;

[0009] Control the second housing flipping mechanism to drive the watch case into the second pre-installed posture;

[0010] The control mechanism for lowering the key body, the third housing flipping mechanism, and the screw feeding mechanism assembles the second key into the watch case via the second mounting hole, so that the second key, the key bracket, and the watch case are in a limiting fit.

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

[0012] In one embodiment of the present invention, the step of controlling the first housing flipping mechanism to drive the watch case into a first pre-installed posture includes:

[0013] Control the first housing flipping mechanism to obtain the housing in a flat position;

[0014] The first housing flipping mechanism is controlled to drive the housing to move in a first preset direction, so that the watch case switches from the flat position to the first pre-installed position.

[0015] In one embodiment of the present invention, the first housing flipping mechanism includes a flipping part and a rotating part, the rotating part being fixedly disposed on the flipping part; the step of controlling the first housing flipping mechanism to drive the housing movement in a first preset direction, so that the watch case switches from the flat position to the first pre-installed position, includes:

[0016] The flipping part is controlled to rotate along a first preset rotation direction so that the watch case switches from a flat position to an upright position.

[0017] The rotating part is controlled to rotate along a second preset rotation direction so that the watch case moves from an upright position to the first pre-installed position. In the first pre-installed position, the insertion port of the first mounting hole faces the base.

[0018] In one embodiment of the present invention, the first button includes a first button body and a retaining spring. The step of controlling the lifting mechanism and the retaining spring pushing mechanism to assemble the first button to the watch case via the first mounting hole includes:

[0019] Control the first housing flipping mechanism to align with the lifting mechanism, so that the first mounting hole is aligned with the first key body located in the lifting mechanism;

[0020] The lifting mechanism is controlled to drive the first button to be assembled to the watch case via the first mounting hole;

[0021] Control the first housing flipping mechanism to align with the snap ring pushing mechanism, so that the first key body is aligned with the snap ring located in the snap ring pushing mechanism;

[0022] The control mechanism drives the retaining ring to assemble the retaining ring to the first key body via the first mounting hole, so that the first key is assembled with the watch case.

[0023] In one embodiment of the present invention, the second housing flipping mechanism includes a flipping part and a rotating part, the rotating part being fixedly disposed on the flipping part; the step of controlling the second housing flipping mechanism to drive the watch case into a second pre-installed posture includes:

[0024] Control the rotating part to obtain the watch case in a flat position;

[0025] The flipping part is controlled to rotate along a first preset rotation direction so that the watch case switches from a flat position to an upright position.

[0026] The rotating part is controlled to rotate along a third preset rotation direction so that the watch case moves from an upright position to a second pre-installed position. In the second pre-installed position, the insertion port of the second mounting hole faces away from the base.

[0027] In one embodiment of the present invention, the second button includes a second button body and a screw; the step of controlling the button body lowering mechanism, the third housing flipping mechanism, and the screw feeding mechanism to assemble the second button to the watch case via the second mounting hole, so that the second button, the button bracket, and the watch case are in a limiting fit, includes:

[0028] The second housing flipping mechanism and the key body lowering mechanism are controlled to assemble the second key body into the watch case via the second mounting hole;

[0029] The third housing flipping mechanism and the screw feeding mechanism are controlled to assemble the screws into the second key body through the second mounting hole, so that the second key, the key bracket and the watch case are in a limiting fit.

[0030] In one embodiment of the present invention, the step of assembling the second key body to the watch case via the second mounting hole by controlling the second housing flipping mechanism and the key body lowering mechanism includes:

[0031] Control the second housing flipping mechanism to align with the key body lowering mechanism, so that the second mounting hole is aligned with the second key body located in the key body lowering mechanism;

[0032] The control mechanism for lowering the key body drives the second key body to be assembled into the watch case via the second mounting hole.

[0033] In one embodiment of the present invention, the housing assembly line further includes a housing fixing fixture; the step of controlling the third housing flipping mechanism and the screw feeding mechanism to assemble the screws to the second key body via the second mounting hole includes:

[0034] The third housing flipping mechanism is controlled to drive the watch case into the third pre-installed posture;

[0035] The watch case fixing fixture is controlled to acquire the watch case in the third pre-installed posture, and the watch case is driven to switch to the screw-on posture.

[0036] The screw feeding mechanism is controlled to assemble the screws onto the button bracket and the second button.

[0037] In one embodiment of the present invention, the watch case fixing fixture includes a watch case support member and a watch case locking part; the step of controlling the watch case fixing fixture to acquire the watch case in the third pre-installed posture and driving the watch case to switch to the screw-on posture includes:

[0038] Control the third housing flipping mechanism to align the watch case support member;

[0039] Control the watch case carrier to acquire the watch case in the third pre-installed posture;

[0040] The watch case locking part is controlled to adjust the attitude of the watch case so that the watch case switches to the screw-on attitude.

[0041] The present invention also proposes a wristband device assembly bus, the wristband device assembly bus including a housing assembly line; the housing assembly line is used to implement the watch case assembly method as described in any of the above claims.

[0042] In this technical solution, a housing assembly line with a specific structure is provided to perform the assembly of the first and second buttons on the watch case in steps. Specifically, the first housing flipping mechanism, the lifting mechanism, and the snap ring pushing mechanism work together to quickly assemble the first button onto the watch case via the first mounting hole. The second housing flipping mechanism, the button lowering mechanism, the third housing flipping mechanism, and the screw feeding mechanism work closely together to efficiently complete the assembly of the second button onto the watch case via the second mounting hole. The entire process is automated, which greatly shortens the assembly time compared to manual assembly and meets the efficiency requirements of large-scale mass production. Based on this, the automated assembly process avoids errors caused by manual operation. Each mechanism operates according to a precise program, resulting in higher accuracy in the assembly positions of the first and second buttons with the watch case, and more precise limiting fit between the buttons, the watch case, and the button bracket. This reduces assembly defects caused by human factors, thereby improving the product yield and meeting the high requirements for product quality stability in the intelligent equipment manufacturing industry. Attached Figure Description

[0043] 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.

[0044] Figure 1 A unit layout diagram of an embodiment of the watch case assembly line provided by the present invention;

[0045] Figure 2 A structural layout diagram of an embodiment of the first assembly unit provided by the present invention;

[0046] Figure 3 A schematic diagram of the structure of an embodiment of the first housing flipping mechanism provided by the present invention in a first state;

[0047] Figure 4 A schematic diagram of the structure of an embodiment of the first housing flipping mechanism provided by the present invention in a second state;

[0048] Figure 5 A schematic diagram of an embodiment of the lifting mechanism provided by the present invention;

[0049] Figure 6 A schematic diagram of an embodiment of the snap ring pushing mechanism provided by the present invention;

[0050] Figure 7 This is a structural layout diagram of an embodiment of the key body loading subunit provided by the present invention;

[0051] Figure 8A structural layout diagram of an embodiment of the screw feeding subunit provided by the present invention;

[0052] Figure 9 A schematic diagram of a structure of an embodiment of the key body lowering mechanism provided by the present invention;

[0053] Figure 10 A schematic diagram of an embodiment of the third housing flipping mechanism provided by the present invention;

[0054] Figure 11 This is a schematic diagram of a structure of an embodiment of the screw feeding mechanism provided by the present invention;

[0055] Figure 12 A first flowchart of an embodiment of the watch case assembly method provided by the present invention;

[0056] Figure 13 A second flowchart of an embodiment of the watch case assembly method provided by the present invention;

[0057] Figure 14 A third flowchart of an embodiment of the watch case assembly method provided by the present invention;

[0058] Figure 15 A fourth flowchart of an embodiment of the watch case assembly method provided by the present invention;

[0059] Figure 16 A fifth flowchart of an embodiment of the watch case assembly method provided by the present invention;

[0060] Figure 17 A sixth flowchart of an embodiment of the watch case assembly method provided by the present invention;

[0061] Figure 18 A seventh flowchart of an embodiment of the watch case assembly method provided by the present invention;

[0062] Figure 19 Eighth flowchart of an embodiment of the watch case assembly method provided by the present invention;

[0063] Figure 20 This is a ninth flowchart of an embodiment of the watch case assembly method provided by the present invention.

[0064] Explanation of icon numbers:

[0065] 10. Base; 11. First assembly unit; 12. Key body loading subunit; 13. Screw loading subunit; 14. Conveying module; 15. Loading unit; 16. Unloading unit;

[0066] 111. First housing flipping mechanism; 112. Lifting mechanism; 113. Snap ring pushing mechanism;

[0067] 121. Second housing flipping mechanism; 122. Key body lowering mechanism;

[0068] 131. Third housing flipping mechanism; 132. Case fixing fixture; 133. Screw feeding mechanism;

[0069] 141. Conveyor belt; 142. Guide rail;

[0070] 1111, First flipping part; 1112, Rotating part; 1113, First rotating shaft; 1114, First fixing part;

[0071] 1121. Lifting drive component; 1122. Workpiece support component; 1123. Button support component; 1124. Guide component;

[0072] 1131. Horizontal push drive component; 1132. Snap ring limiting component;

[0073] 1311. Second flipping part; 1312. Locking part; 1313. Second rotating shaft; 1314. Second fixing part;

[0074] 2. Second bond body.

[0075] 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

[0076] 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.

[0077] 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.

[0078] 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.

[0079] To achieve the above objectives, the watch case assembly method is used to assemble a watch case and a button assembly. The watch case includes a first mounting hole, a second mounting hole, and a button bracket. The button bracket is aligned with the second mounting hole. The button assembly includes a first button and a second button. A watch case assembly line is provided. The base of the watch case assembly line includes a first watch case flipping mechanism, a lifting mechanism, a snap ring pushing mechanism, a second watch case flipping mechanism, a third watch case flipping mechanism, a button lowering mechanism, and a screw feeding mechanism. Please refer to [link to relevant documentation]. Figure 12 The watch case assembly method includes:

[0080] Step S10: Control the first housing flipping mechanism to drive the watch case into the first pre-installed posture;

[0081] Step S20: Control the lifting mechanism and the snap ring pushing mechanism to assemble the first button to the watch case via the first mounting hole;

[0082] Step S30: Control the second housing flipping mechanism to drive the watch case into the second pre-installed posture;

[0083] Step S40: Control the key body lowering mechanism, the third housing flipping mechanism, and the screw feeding mechanism to assemble the second key into the watch case via the second mounting hole, so that the second key, the key bracket, and the watch case are in a limiting fit;

[0084] The first button and the second button are executed in steps during the assembly of the watch case.

[0085] First, it needs to be explained that the shell assembly line includes the most basic feeding unit and unloading unit. In these two units, whether the automated palletizing and unloading is achieved through equipment or the manual palletizing and unloading is used to control costs, in order to ensure that the shell does not tilt, shift or change position or posture during the circulation process, the shell is placed flat, that is, the front or back of the shell faces the surface of the base, thereby ensuring the stability of the shell during the circulation process.

[0086] Step S10 is the preparatory step for assembling the first button. Its core purpose is to create conditions for precise alignment between the first button and the first mounting hole through posture adjustment. First, the first housing flipping mechanism, as the core execution component for posture adjustment, will start its action according to a preset program, causing the watch case to rotate around a specific axis to a preset angle. Since the first button needs to be assembled through the first mounting hole of the watch case, the initial position of the watch case may not meet the insertion direction or assembly operation space requirements of the first button. Therefore, the first housing flipping mechanism adjusts the watch case to the "first pre-assembled posture"—in this posture, the first mounting hole will be in a position that facilitates the lifting mechanism to push the first button and ensures a smooth button insertion path. For example, the axis of the first mounting hole is aligned with the pushing direction of the lifting mechanism, while reserving sufficient space for the subsequent operation of the retaining spring pushing mechanism, ensuring the continuity and accuracy of the entire first button assembly process.

[0087] Step S20 is the core assembly step of the first button. Through the coordinated action of the lifting mechanism and the pushing mechanism, the first button is precisely assembled with the watch case. First, the lifting mechanism lifts the first button to be assembled to the height position corresponding to the first mounting hole of the watch case according to the preset position parameters, ensuring that the axis of the first button is aligned with the axis of the first mounting hole, laying the positional foundation for the subsequent insertion operation; then, the retaining spring pushing mechanism is activated, applying a stable pushing force to the first button, causing the first button to be slowly inserted into the first mounting hole of the watch case along the preset path.

[0088] Step S30 is a transitional step connecting the assembly of the first button and the assembly of the second button. The core is to readjust the watch case posture to accommodate the assembly requirements of the second button and the second mounting hole. Since the structure, assembly path, and mating relationship of the second button differ from the first button, the current posture of the watch case after the first button assembly cannot meet the assembly requirements of the second button. For example, the initial position of the second mounting hole may be obstructed by the watch case structure itself or the already assembled first button, or the insertion direction of the second button may not match the current watch case posture. Furthermore, the button bracket is aligned with the second mounting hole, requiring precise positioning with the bracket after the second button is inserted. Therefore, the second housing flipping mechanism drives the watch case to a "second pre-assembled posture" based on the position parameters of the second mounting hole, the button bracket, and the assembly path of the second button. In this posture, the second mounting hole is positioned to facilitate the placement of the second button by the button lowering mechanism, while ensuring that the button bracket inside the watch case is precisely in the limiting position after the second button is inserted.

[0089] Step S40 is the assembly stage of the second button. Through the coordinated operation of three mechanisms, the second button is precisely assembled and fixed to the watch case and button bracket. This step completes the assembly of the second button in stages and achieves the limiting and coordination of the three components through the coordinated operation of the three mechanisms. First, the button lowering mechanism fixes the second button body with a contour jig or vacuum adsorption. With the second mounting hole of the watch case aligned with its lifting end, the button body is smoothly lowered by a servo drive, accurately embedding it into the second mounting hole, thus initially completing the assembly with the watch case. At the same time, the guide component and preset force prevent damage to the components. Second, the third case flipping mechanism, through the locking part, misaligns the second button body and the button bracket, clamps the inner circumference of the watch case, and switches the watch case from the second button body assembly posture to the second vertical posture via the second flipping part, and then transfers it to the watch case fixing fixture. Throughout the process, the watch case posture remains stable, ensuring that the relative position of the button body and the bracket remains unchanged. Finally, the watch case fixing fixture clamps the watch case with the locking part and finely adjusts it to the screw feeding posture, that is, the screw hole is aligned with the screw bit. The screw feeding mechanism selects the screws through the vibratory plate and feeds the screws to the screw bit through the feeding tube. The electric screwdriver tightens the screws according to the preset torque, so that the second button body is firmly connected to the button bracket. Finally, the "second button - button bracket - watch case" limit cooperation is achieved to meet the pressing function requirements.

[0090] In one embodiment of the present invention, please refer to Figure 13 Step S10 includes:

[0091] Step S110: Control the first housing flipping mechanism to obtain the watch case in a flat position;

[0092] Step S120: Control the first housing flipping mechanism to drive the housing to move in a first preset direction, so that the watch case switches from the flat position to the first pre-installed position.

[0093] Step S110 is the initial stage of case attitude adjustment. The core of this process is the precise gripping and fixing of the case in a flat position using a case flipping mechanism. A flat position means the axis of the first or second mounting hole of the case is parallel to the base surface, and the case is typically placed with its front or back facing the base (as in the initial state of a case transported by the conveyor module). The rotating part of the case flipping mechanism has a clamping function, initiating the clamping action based on the characteristics of the inner or outer circumferential surface of the case: for the inner circumferential surface, its movable clamping arms move away from each other to conform to the inner wall, fixing the case with a constant clamping force; for the outer circumferential surface, the clamping arms move closer together to wrap around the outer circumference, avoiding damage to the case's surface coating. During the gripping process, the case flipping mechanism, in conjunction with the case arrival signal from the conveyor module, ensures that the rotating part is precisely aligned with the case, preventing gripping deviation that could cause the case to fall off or deviate from its initial attitude, providing a stable foundation for subsequent attitude switching.

[0094] Step S120 is the core step in adjusting the watch case posture. Through the coordinated action of the watch case flipping mechanism, the flat watch case is transformed into a first pre-assembled posture that meets the assembly requirements of the first button. The first preset direction is a motion trajectory preset based on the assembly requirements of the first mounting hole. The action of the watch case flipping mechanism is divided into two steps: First, the first flipping part rotates around the first rotating axis under the drive of the servo motor, causing the watch case to switch from a flat posture to a first upright posture, such as the mounting hole axis changing from parallel to the base surface to intersecting with the base surface, such as flipping 90°, so that the watch case is perpendicular to the base; Second, the rotating part drives the watch case to rotate slightly under the drive of the rotating motor, adjusting the circumferential angle of the watch case in the first upright posture, so that the insertion port of the first mounting hole is completely aligned with the lifting end of the lifting mechanism, thus forming the first pre-assembled posture. The entire process achieves high-precision angle control through servo drive, ensuring that the axis of the first mounting hole coincides with the path of the lifting mechanism pushing the first button, while a constant clamping force avoids displacement or damage to the watch case, creating conditions for the accurate insertion of the first button.

[0095] In one embodiment of the present invention, the first housing flipping mechanism includes a flipping part and a rotating part, wherein the rotating part is fixedly disposed on the flipping part; see also Figure 14 Step S120 includes:

[0096] Step S1210: Control the flipping part to rotate along the first preset rotation direction so that the watch case switches from a flat position to an upright position;

[0097] Step S1220: Control the rotating part to rotate along the second preset rotation direction so that the watch case moves from the vertical position to the first pre-installed position. In the first pre-installed position, the insertion port of the first mounting hole faces the base.

[0098] Step S1210 is the step of changing the watch case's posture from the initial placement state to the assembly and adaptation state. The core is to change the overall posture of the watch case through the directional rotation of the flipping part. Under the drive of servo motors and other drive components, the flipping part of the first housing flipping mechanism rotates smoothly along the first preset rotation direction. Its rotation angle can be precisely controlled to ensure that the watch case is exactly in an upright state after flipping (without excessive flipping or flipping). At the same time, since the rotating part is fixed to the flipping part, the rotating part will move synchronously with the flipping part, thereby driving the watch case, which is clamped and fixed by the rotating part, to complete the posture change together. This avoids relative displacement between the watch case and the flipping and rotating parts during the flipping process, laying a stable posture foundation for the subsequent fine-tuning action of the rotating part.

[0099] Step S1220, based on the upright posture, achieves the orientation alignment of the watch case mounting holes through the precise rotation of the rotating part, ultimately reaching the first pre-assembly posture. The second preset rotation direction is a preset rotation trajectory (such as circumferential rotation around the axis of the rotating part itself) based on the target that "the insertion port of the second mounting hole must face the base." Driven by a dedicated drive component (such as a rotary motor), the rotating part drives the watch case to perform circumferential fine adjustments along the second preset rotation direction. Its rotation accuracy can be controlled within a high range, ensuring that the insertion port of the first mounting hole can accurately turn and face the base when the watch case is in the upright posture. When the insertion port of the first mounting hole is fully facing the base, the watch case enters the first pre-assembly posture—this posture can be directly adapted to subsequent assembly operations related to the first mounting hole without adjusting the overall posture of the watch case, reducing time consumption in terms of process connection, while ensuring the alignment accuracy of the mounting hole and subsequent assembly mechanisms, avoiding assembly defects caused by hole position deviations.

[0100] In one embodiment of the present invention, the first button includes a first button body and a retaining spring; please refer to [reference needed]. Figure 15 Step S20 includes:

[0101] Step S210: Control the first housing flipping mechanism to align with the lifting mechanism, so that the first mounting hole is aligned with the first key body located in the lifting mechanism;

[0102] Step S220: Control the lifting mechanism to drive the first button to be assembled to the watch case via the first mounting hole;

[0103] Step S230: Control the first housing flipping mechanism to align with the snap ring pushing mechanism, so that the first key body is aligned with the snap ring located in the snap ring pushing mechanism;

[0104] Step S240: Control the snap ring pushing mechanism to drive the snap ring to assemble it to the first key body via the first mounting hole, so that the first key is assembled with the watch case.

[0105] Step S210 is the pre-alignment stage for assembling the first key body and the watch case. The core of this step involves the precise movement of the first housing flipping mechanism to align the first mounting hole on the watch case with the first key body on the lifting mechanism. The first housing flipping mechanism relies on the coordinated operation of its flipping and rotating parts: the flipping part can finely adjust the overall height and tilt angle of the watch case, while the rotating part drives the watch case to rotate circumferentially around its own axis. Together, they move the watch case, already in a clamped state, directly above the lifting mechanism, ensuring that the axis of the first mounting hole on the watch case is completely aligned with the axis of the first key body on the lifting mechanism. During this process, alignment accuracy is ensured by the servo drive control of the mechanism, preventing eccentricity or misalignment between the first mounting hole and the first key body, thus clearing any positional obstacles for the subsequent smooth insertion of the first key body into the mounting hole.

[0106] Step S220 is the core execution step of embedding the first key into the watch case. The stable driving force provided by the lifting mechanism completes the initial assembly of the first key with the watch case. The lifting end of the lifting mechanism pre-bears and positions the first key. After receiving the alignment completion signal, a servo electric cylinder or pneumatic cylinder-type lifting drive is activated, driving the lifting end to rise smoothly along the axis of the first mounting hole, pushing the first key into the first mounting hole of the watch case at a preset speed and thrust. The lifting mechanism stops operating when the preset assembly position of the first key is flush with the inner wall of the watch case. At this point, the first key is initially fixed to the watch case, reserving axial space for subsequent snap ring assembly.

[0107] Step S230 is the alignment transition stage for assembling the retaining ring and the first key body. Through the transfer and attitude adjustment of the first housing flipping mechanism, the watch case with the first key body already preliminarily assembled is precisely aligned with the retaining ring on the pushing mechanism. The first housing flipping mechanism drives the rotating and flipping parts holding the watch case to move, transferring the watch case from the lifting mechanism station to the pushing mechanism station, maintaining the stability of the watch case's attitude during the process. After reaching the pushing mechanism station, the rotating part can finely adjust the circumferential angle of the watch case, and the flipping part can finely adjust the horizontal position of the watch case, so that the axis of the retaining ring assembly slot of the first key body inside the watch case is completely consistent with the pushing path of the retaining ring on the pushing mechanism, ensuring that the retaining ring can be accurately pushed to the assembly position in a straight line.

[0108] Step S240 is the final stage of assembling the first button. Through the horizontal pushing action of the retaining ring pushing mechanism, the retaining ring is fixed to the first button body, ultimately achieving complete assembly of the first button with the watch case. The retaining ring limiting component of the retaining ring pushing mechanism pre-loads and positions the retaining ring (ensuring correct retaining ring posture through grooves or adsorption structures). After receiving the alignment completion signal, the horizontal pushing drive component (such as a pneumatic slide or electric push rod) is activated, driving the retaining ring limiting component to move smoothly in the horizontal direction, pushing the retaining ring through the first mounting hole of the watch case into the retaining ring assembly slot of the first button body. After entering the assembly slot, the retaining ring will achieve axial positioning with the first button body through its own elastic deformation, preventing the first button body from falling out of the first mounting hole of the watch case. At this point, the first button, composed of the first button body and the retaining ring, is stably assembled with the watch case, meeting the structural requirements of the subsequent torsional adjustment function.

[0109] In one embodiment of the present invention, please refer to Figure 16 The second housing flipping mechanism includes a flipping part and a rotating part, wherein the rotating part is fixedly disposed on the flipping part; step S30 includes:

[0110] Step S310: Control the rotating part to obtain the watch case in a flat position;

[0111] Step S320: Control the flipping part to rotate along the first preset rotation direction so that the watch case switches from a flat position to an upright position;

[0112] Step S330: Control the rotating part to rotate along the third preset rotation direction so that the watch case moves from the vertical position to the second pre-installed position. In the second pre-installed position, the insertion port of the second mounting hole faces away from the base.

[0113] Step S310 is the initial stage of the second housing flipping mechanism adjusting the attitude of the watch case. The core function is to stably grip and fix the watch case in a flat position through the clamping function of the rotating part. The flat position refers to the initial state when the axis of the second mounting hole of the watch case is parallel to the base surface, such as when it is transported to the designated station by the conveying module. The rotating part, as the core clamping component of the second housing flipping mechanism, has an openable clamping structure (such as grippers adapted to the inner or outer circumferential surface of the watch case). Triggered by a control signal, the grippers of the rotating part precisely align according to the shape characteristics of the watch case (such as the curvature of the inner wall and the outer circumferential dimensions), clamping the watch case with a preset clamping force. This ensures that there is no relative displacement between the watch case and the rotating part during subsequent flipping and rotation, providing a stable bearing foundation for subsequent attitude switching.

[0114] Step S320 is a crucial step in transforming the watch case from its initial placement posture to its assembly and adaptation posture. The overall spatial posture of the watch case is changed by the directional rotation of the flipping part. The first preset rotation direction is a predetermined trajectory based on the requirement that the watch case needs to change from a flat to an upright position (e.g., clockwise or counterclockwise rotation around the axis of the flipping part). Driven by servo motors and other drive components, the flipping part rotates smoothly along the first preset rotation direction. The rotation angle can be precisely controlled, ensuring that the watch case changes from a flat posture where the axis of the second mounting hole is parallel to the base to an upright posture where the axis of the second mounting hole intersects (e.g., perpendicularly) the surface of the base. Since the rotating part is fixed to the flipping part, it moves synchronously with the flipping part, thereby driving the clamped watch case to complete the posture transformation. Furthermore, the rotation speed of the flipping part can be adjusted throughout the process, preventing the watch case from swaying or shifting due to inertia.

[0115] Step S330, based on the upright posture, achieves the orientation alignment of the second mounting hole in the watch case through the precise rotation of the rotating part, ultimately reaching the second pre-assembled posture suitable for the assembly of the second button. The third preset rotation direction is a circumferential rotation trajectory based on the target of "the insertion port of the second mounting hole must face away from the base". Driven by a dedicated drive component, the rotating part drives the watch case to make circumferential fine adjustments along the third preset rotation direction. The rotation accuracy can be controlled within the range of ≤0.1°, ensuring that the insertion port of the second mounting hole can be accurately turned and completely facing away from the base when the watch case is in the upright posture. When the insertion port of the second mounting hole faces away from the base, the watch case enters the second pre-assembled posture—this posture can directly adapt to the subsequent key body lowering mechanism without additional adjustment of the overall posture of the watch case. This reduces the process connection time and ensures the alignment accuracy between the second mounting hole and subsequent assembly components (such as the second key body), avoiding key body assembly jamming or structural damage caused by hole position deviation.

[0116] In one embodiment of the present invention, the second button includes a second button body and a screw; please refer to [link / reference]. Figure 17 Step S40 includes:

[0117] Step S410: Control the second housing flipping mechanism and the key body lowering mechanism to assemble the second key body into the watch case via the second mounting hole;

[0118] Step S420: Control the third housing flipping mechanism and the screw feeding mechanism to assemble the screw into the second key body through the second mounting hole, so that the second key, the key bracket and the watch case are in a limiting fit.

[0119] Step S410 is the core step in the initial assembly of the second key body and the watch case. Through the coordinated action of the second housing flipping mechanism and the key body lowering mechanism, the second key body is precisely embedded into the second mounting hole of the watch case. Previously, the second housing flipping mechanism had adjusted the watch case to the second pre-installed posture (the insertion port of the second mounting hole faces away from the base). Based on this, the second housing flipping mechanism maintains the stability of the watch case posture through the fine adjustment of its flipping and rotating parts, ensuring that the second mounting hole is always in the correct position for the key body lowering mechanism. The lifting end of the key body lowering mechanism is pre-fixed to the second key body by a contour jig or vacuum adsorption. After receiving the alignment signal, the lifting end descends smoothly in the direction towards the base, pushing the second key body into the second mounting hole of the watch case at a preset speed and thrust until the preset limiting structure of the second key body is initially in contact with the inner wall of the watch case, completing the initial assembly of the second key body and the watch case, and reserving the space for subsequent screw fixing and mating with the button bracket.

[0120] Step S420 is the final stage of the second button assembly. Through the cooperation of the third housing flipping mechanism and the screw feeding mechanism, the screws are fixed and a three-way limiting fit is achieved. First, the third housing flipping mechanism clamps the watch case through a locking part. This locking part can misalign the second button body and the button bracket, flipping the watch case from the second pre-assembled position to the screw assembly adaptation position. Simultaneously, the watch case is transferred to the watch case fixing fixture and positioned, preventing displacement during screw assembly. Then, the screw feeding mechanism uses a vibratory feeder to select qualified screws and feeds them to an electric screwdriver bit via a feeding tube. The bit picks up the screw, aligns it with the second mounting hole, and advances axially to screw the screw into the threaded holes of the second button body and the button bracket at a preset torque. After the screw is tightened, the second button body and the button bracket are fixed, and the preset fitting structure between the button bracket and the watch case ensures a stable limiting fit between the second button, the button bracket, and the watch case, meeting the functional requirements of subsequent pressing operations.

[0121] In one embodiment of the present invention, please refer to Figure 18 Step S410 includes:

[0122] Step S4110: Control the second housing flipping mechanism to align with the key body lowering mechanism, so that the second mounting hole is aligned with the second key body located in the key body lowering mechanism;

[0123] Step S4120: Control the key body lowering mechanism to drive the second key body to be assembled into the watch case via the second mounting hole.

[0124] Step S4110 is the alignment step in assembling the second key body with the watch case. The core of this step involves the precise movement of the second housing flipping mechanism to align the second mounting hole on the watch case with the position of the second key body on the key body lowering mechanism. The second housing flipping mechanism relies on the coordinated operation of its flipping and rotating parts: the flipping part can finely adjust the overall height and tilt angle of the watch case to ensure that the spatial position of the watch case matches the lifting end of the key body lowering mechanism; the rotating part drives the watch case to rotate circumferentially around its own axis, precisely adjusting the angle of the watch case so that the axis of the second mounting hole on the watch case completely coincides with the axis of the second key body on the key body lowering mechanism. During this process, alignment accuracy is ensured by the servo drive control of the mechanism, avoiding problems such as eccentricity or misalignment between the second mounting hole and the second key body, clearing positional obstacles for the subsequent smooth insertion of the second key body into the mounting hole, and ensuring the accuracy of the assembly starting point.

[0125] Step S4120 is the execution stage for embedding the second key into the watch case. The stable driving force provided by the key lowering mechanism completes the initial assembly of the second key with the watch case. The lifting end of the key lowering mechanism is pre-supported and positioned by a contour jig or limiting structure. After receiving the alignment completion signal, the drive component of the key lowering mechanism starts, causing the lifting end to descend smoothly along the axis of the second mounting hole, pushing the second key into the second mounting hole of the watch case at a preset speed and thrust. The key lowering mechanism stops operating when the preset assembly position of the second key is flush with the inner wall of the watch case. At this point, the second key is initially fixed in the first mounting hole of the watch case, reserving axial and circumferential space for subsequent screw assembly, thus completing the initial assembly of the second key with the watch case.

[0126] In one embodiment of the present invention, the housing assembly line further includes a housing fixing fixture; please refer to [link / reference]. Figure 19 Step S420 includes:

[0127] Step S4210: Control the third housing flipping mechanism to drive the watch case into the third pre-installed posture;

[0128] Step S4220: Control the watch case fixing fixture to acquire the watch case in the third pre-installed posture, and drive the watch case to switch to the screw-on posture;

[0129] Step S4230: Control the screw feeding mechanism to assemble the screws to the button bracket and the second button.

[0130] Step S4210 is a crucial step in preparing the watch case for subsequent screw assembly. The core mechanism uses the third housing flipping mechanism to adjust the watch case, which has already had the second key body pre-assembled, to a third pre-assembled position suitable for the watch case fixing fixture's gripping and subsequent screw assembly. The third housing flipping mechanism has a flipping section and a locking section. The locking section first uses an openable locking element (misaligning the second key body and the button bracket to avoid contact with assembled components) to abut against the inner circumference of the watch case, achieving stable clamping of the watch case. Then, driven by the drive component, the flipping section rotates along a preset trajectory, switching the watch case from its initial position after the second key body assembly to the third pre-assembled position. This position must meet the gripping requirements of the watch case fixing fixture, such as aligning the watch case's positioning reference surface with the load-bearing direction of the fixture, while ensuring that the screw holes of the second key body and the button bracket are in a state conducive to subsequent fine-tuning to the screw assembly position, laying the foundation for the watch case fixing fixture to accurately grasp the watch case.

[0131] Step S4220 is the core step in achieving precise positioning and attitude conversion of the watch case. Through the dual action of gripping and fixing and attitude fine-tuning of the watch case fixing fixture, a precise attitude is provided for screw assembly. First, the watch case carrier of the watch case fixing fixture, based on the shape characteristics of the watch case in the third pre-installed attitude, precisely supports the watch case using a positioning pin or vacuum adsorption structure. Simultaneously, the openable locking parts of the watch case locking part approach each other, abutting against the inner circumferential surface of the watch case and applying a constant clamping force to ensure that the watch case does not shift within the fixture. Subsequently, driven by a drive component such as a linear module or rotary cylinder, the watch case locking part drives the watch case to rotate or translate around a preset axis, switching the watch case from the third pre-installed attitude to the screw loading attitude. In this attitude, the screw hole axis of the second key body and the key bracket are completely aligned, and the screw hole faces the direction of the screw bit of the screw loading mechanism (e.g., perpendicular to the bit axis), ensuring that the screw can be precisely screwed into the screw hole in a straight line, avoiding stripping or incomplete assembly due to hole position deviation.

[0132] Step S4230 is the final stage where the second button is fixed to the watch case and button bracket. The screw assembly and the three-way positioning are completed through the automated action of the screw feeding mechanism. The screw feeding mechanism first selects qualified screws using a vibratory feeder and then feeds them to the electric screwdriver bit with the head facing forward via a feeding tube. After the screw is magnetically attracted and fixed, the bit moves to the front of the screw hole under the drive of the driving component and advances along the screw hole's axis. When the screw contacts the screw hole, the electric screwdriver starts tightening. A torque sensor monitors the tightening torque in real time, and the screw automatically stops and reverses a preset number of turns after reaching the preset torque to prevent jamming. After the screw is fully screwed in, the bit disengages from the screw, completing the assembly. At this point, the screw simultaneously connects the button bracket and the second button body, preventing axial movement of the second button. The button bracket provides circumferential positioning for the second button, ultimately achieving a stable positioning and positioning of the "second button - button bracket - watch case," meeting the functional requirements of subsequent pressing operations.

[0133] In one embodiment of the present invention, the watch case fixing fixture includes a watch case support member and a watch case locking part; please refer to Figure 20 Step S4220 includes:

[0134] Step S42210: Control the third housing flipping mechanism to align the watch case support member;

[0135] Step S42220: Control the watch case carrier to acquire the watch case in the third pre-installed posture;

[0136] Step S42230: Control the case locking part to adjust the attitude of the case so that the case switches to the screw-on case attitude.

[0137] Step S42210 is the pre-alignment stage for transferring the watch case from the third case flipping mechanism to the case fixing fixture. The core of this step is to achieve precise alignment between the watch case and the case fixing fixture through the precise movement of the third case flipping mechanism. The third case flipping mechanism relies on the coordinated operation of its flipping and locking parts: the flipping part drives the locking part, which holds the watch case, to move along a preset trajectory, adjusting the overall spatial position of the watch case; the locking part maintains stable clamping of the watch case, preventing it from shifting during alignment. Ultimately, the watch case, in its third pre-assembled position, has its positioning reference perfectly matched with the preset docking position of the watch case carrier component of the case fixing fixture, ensuring that the watch case can be accurately placed into the watch case carrier component subsequently, avoiding damage to the watch case or difficulties in subsequent posture adjustment due to alignment deviations.

[0138] Step S42220 is the execution stage where the watch case is transferred from the third case flipping mechanism to the watch case fixing fixture. The watch case picking station serves as a transition station connecting the two, and completes the reception and initial positioning of the watch case through a preset gripping or receiving structure. After the third case flipping mechanism and the watch case fixing fixture are aligned, the execution components of the watch case carrier (such as pneumatic grippers, vacuum suction cups, and misaligned assembled components adapted to the watch case shape) are activated to grip the watch case in the third pre-assembled posture from the locking part of the third case flipping mechanism. After gripping, the execution components are activated to ensure that the watch case in the third pre-assembled posture can be stably fixed to the watch case carrier, providing a basis for subsequent locking and posture switching.

[0139] Step S42230 is the core step in the transition of the watch case posture from the third pre-installed posture to the screw assembly adaptation posture. The watch case locking part of the watch case fixing fixture achieves precise locking and posture fine-tuning of the watch case. First, at least two openable locking parts of the watch case locking part are activated, moving closer to each other and abutting against the inner circumferential surface of the watch case, while avoiding the second key body and the button support. The watch case locking part applies a constant clamping force to fix the watch case to the watch case carrier, counteracting the reaction force during subsequent posture adjustment and screw assembly. Subsequently, driven by a drive component (such as a lead screw mechanism driven by a servo motor or a rotary cylinder), the watch case locking part drives the watch case to perform circumferential fine-tuning around a preset axis or translation along a specific direction, gradually adjusting the angle and position of the watch case until the screw hole axis of the second key body and the button support on the watch case is completely aligned, and the screw hole faces the direction of the screw feeding mechanism's bit (e.g., the screw hole axis and the bit axis are collinear). At this point, the watch case officially switches to the screw feeding posture, providing optimal posture conditions for subsequent precise screw assembly.

[0140] The following is a structural explanation of the shell assembly line.

[0141] Please see Figures 1 to 11 The watch case assembly line includes:

[0142] Base 10, which is provided with a first assembly unit 11, a second assembly unit and a conveying module 14;

[0143] The first assembly unit 11 is configured to assemble the first key body and the retaining ring to the first mounting hole of the case;

[0144] The second assembly unit is configured to sequentially assemble the second key body 2 into the second mounting hole of the watch case and assemble screws into the key bracket to assemble with the second key body 2;

[0145] The conveying module 14 is configured to convey the watch case between the first assembly unit 11 and the second assembly unit.

[0146] The watch case assembly line proposed in this invention is used to assemble watch cases and button assemblies. The watch case includes a first mounting hole and a second mounting hole. A button bracket is provided on the outer periphery of the second mounting hole. The button assembly includes a first button and a second button. The first button includes a first button body and a retaining spring, and the second button includes a second button body and a screw. The first button and the second button body are two different types of buttons. For example, the first button is a round button, usually used for turning, and the second button is a square button, usually used for pressing. Users can control the smart wearable device to achieve different functions by applying different actions to different buttons.

[0147] It is understood that the watch case assembly line has a basic loading unit 15 and unloading unit 16. The loading unit 15 provides watch cases that have not yet been assembled with the button bracket or provide watch cases that have been pre-assembled with the button bracket. The unloading unit 16 is used to store or transfer watch cases that have been assembled with the buttons. Between the loading unit 15 and the unloading unit 16, there is a first assembly unit 11 and a second assembly unit. The watch case assembly line can be an assembly process from the loading unit 15 to the first assembly unit 11 to the second assembly unit, or it can be an assembly process from the loading unit 15 to the second assembly unit to the first assembly unit 11. In this invention, no limitation is made.

[0148] It needs to be explained that when the feeding unit 15 provides a watch case that has not yet been assembled with the button bracket, the watch case assembly line can first complete the assembly of the first button, and then manually assemble the button bracket. The watch case is then conveyed into the second assembly unit via the conveying module 14 for the assembly of the second button. When the feeding unit 15 provides a watch case pre-installed with the button bracket, the assembly of the second button can be completed first, and the watch case is then conveyed into the first assembly unit 11 via the conveying module 14 for the assembly of the first button.

[0149] Specifically, the base 10 refers to the rigid frame structure that supports each functional module. It can be implemented using a welded steel structure or a CNC-machined aluminum profile frame, providing a stable installation reference for the assembly units. The first assembly unit 11 refers to a dedicated workstation for assembling the first button. It can be implemented using a multi-axis robotic arm in conjunction with a vision positioning system to ensure the coaxiality of the first button and the mounting hole. The second assembly unit refers to a dedicated workstation for assembling the second button. It can be implemented using a servo pressing mechanism in conjunction with a spring preload device to precisely control the spring compression stroke. The conveying module 14 refers to the material transfer system. It can be implemented using one or more conveying devices such as a conveyor belt 141, a shuttle trolley, and a guide rail 142, or a combination of multiple conveying devices; no specific limitations are specified here.

[0150] The conveying module 14 is distributed on the base 10 and has two core functions: the first core function is to realize the flow of the watch case between different units, such as the flow between the first assembly unit 11 and the second assembly unit, and the flow between the feeding unit 15 and the first assembly unit 11; the second core function is to realize the flow of the watch case to different workstations in any unit. For example, in the first assembly unit 11, the first assembly unit 11 has at least a watch case picking workstation, a button lifting workstation, and a snap ring pushing workstation. First, the watch case is transferred from the previous unit to the watch case picking workstation of the first assembly unit 11 under the action of the conveying module 14. At the watch case picking workstation, the watch case can be removed and fixed by a robotic arm, the first housing flipping mechanism 111, etc. Then, under the sliding of the mover of the guide rail 142, it enters the button lifting workstation, where the insertion of the first key body is completed. In summary, the conveying modules 14 distributed in more than 10 positions on the base serve to connect the assembly actions of the watch case assembly line, so that the assembly actions are no longer independent and the assembly between the watch case and the buttons is completed in an orderly manner.

[0151] In the first assembly unit 11, the first key body can be guided into the first mounting hole of the watch case by means of a robotic arm, a directional pushing mechanism, or other devices. Then, the retaining ring is pressed into the watch case so that the retaining ring, the first key body, and the watch case form a whole. The second assembly unit performs two processes. The first step is key body insertion. The second key body 2 is picked up by a robotic arm or attracted by a vacuum suction cup, electrostatic adsorption, or other devices, aligned with the second mounting hole, and then inserted into the second mounting hole from top to bottom in a vertical direction. An electric screwdriver (with torque sensor) is moved to the bracket screw hole position and the screw is screwed into the threaded hole at the bottom of the key body and the bracket hole, thereby realizing the fixed assembly of the key bracket, the second key body, and the watch case.

[0152] In this technical solution, the watch case assembly line, through the first assembly unit 11, the second assembly unit, and the conveying module 14 integrated in the base 10, achieves fully automated assembly of the watch case and button components. Specifically, the first and second assembly units respectively perform precise operations for assembling the first button (containing the first button body and spring clip) with the first mounting hole of the watch case, and the second button (containing the second button body 2 and screw) with the second mounting hole of the watch case and the button bracket. This avoids problems such as assembly position deviation and uneven force that are prone to occur during manual operation, effectively reducing product defects caused by human error, thereby improving the product yield rate and solving the bottleneck of yield rate fluctuation in manual assembly in the prior art. Simultaneously, the conveying module 14 can automatically transport the watch case between the first assembly unit 11 and the second assembly unit without manual handling or workstation switching. Furthermore, the operating efficiency of each assembly unit is far higher than that of manual assembly, enabling continuous and large-scale assembly operations, significantly improving overall product processing efficiency, meeting the needs of large-scale mass production of smartwatches, and overcoming the shortcomings of low efficiency and difficulty in adapting to mass production in the prior art.

[0153] In one embodiment of the present invention, the first assembly unit 11 includes a first housing flipping mechanism 111, a lifting mechanism 112, and a snap ring pushing mechanism 113. The first housing flipping mechanism 111 is configured to flip and rotate the watch case so that the first mounting hole of the watch case is aligned with the lifting end of the lifting mechanism 112. The lifting mechanism 112 is configured to drive the first key body located at the lifting end to move upward so as to assemble the first key body into the first mounting hole of the watch case.

[0154] The retaining ring push mechanism 113 is configured to push the retaining ring into the watch case so that the retaining ring is assembled with the first key.

[0155] In this embodiment, the first assembly unit 11 integrates a first housing flipping mechanism 111, a lifting mechanism 112, and a snap ring pushing mechanism 113, forming a standardized automated assembly process for the button assembly. First, the first housing flipping mechanism 111 flips and rotates the watch case to achieve precise alignment between the first mounting hole and the lifting end of the lifting mechanism 112. Compared to manual adjustment of the watch case posture, this mechanism uses mechanical limits and drive control, such as a servo motor driving a rotating shaft, to control the hole alignment deviation within a high-precision range, ensuring that the first button / second button can be inserted along the axis of the mounting hole, avoiding scratches on the hole wall or button jamming due to misalignment, thus ensuring accuracy from the assembly starting point. Second, the lifting mechanism 112 carries and lifts the first button through its lifting end, replacing manual pressing. The driving force provided by a cylinder or servo electric cylinder can be precisely set, and different driving forces are provided for different button types. For example, the lifting force for a small-weight first button is set to 5-8N, and the lifting force for a large-weight first button is set to 10-15N. N ensures that the button is fully inserted into the mounting hole, avoiding incomplete assembly due to insufficient manual pressing force, and also prevents deformation of the button or watch case due to excessive torque, solving the problem of uneven manual operation force. After the first button is installed, the watch case can move towards the retaining spring pushing mechanism 113 under the action of the conveying module 14, so that the retaining spring pushing mechanism 113 can realize the assembly of the retaining spring and the button through a flat pushing operation. Alternatively, the retaining spring pushing mechanism 113 can move towards the first housing flipping mechanism 111, which is not limited. Compared with manually installing the retaining spring with tools such as tweezers, this mechanism can constrain the retaining spring posture through the limiting structure and push the retaining spring to the watch case with a constant or linearly changing pushing force, ensuring accurate circumferential or axial positioning of the retaining spring and button, avoiding the risk of button falling off due to loose retaining spring.

[0156] In one embodiment, the first housing flipping mechanism 111 consists of a multi-stage rotating joint and a clamping mechanism. The clamping mechanism is located at the free end of the multi-stage rotating joint. The multi-stage rotating joint enables the switching of different postures of the watch case. The clamping mechanism is used to remove and clamp the outer surface of the watch case from the tray. The lifting mechanism 112 consists of a lifting drive, a guide component, and a positioning fixture. The lifting drive 1121 provides lifting power. The guide component, for example, uses a linear slide rail and a slider to ensure the straightness of the lifting motion. The positioning fixture is designed with a contour groove according to the shape characteristics of the first key body to achieve precise limiting and positioning of the key. The snap ring pushing mechanism 113 consists of a translation drive, a snap ring feeding track, and a pressing head. The translation drive drives the pressing head to move in the horizontal direction. The snap ring feeding track directionally conveys the snap ring to the front end of the pressing head. The pressing head has a groove that matches the snap ring to maintain the snap ring posture and ensure that the snap ring does not shift or fall off during the pushing process. Finally, it is accurately pushed to the assembly position to form a stable fit with the key.

[0157] In another embodiment, the lifting mechanism 112 includes a lifting drive 1121, a supporting workpiece 1122, a guide 1124, and a button support 1123. The supporting workpiece 1122 is fixed to the surface of the base 10. The guide 1124 is located on the side of the supporting workpiece 1122 facing away from the surface of the base 10, with its extension direction perpendicular to the surface of the base 10. The supporting workpiece 1122 movably passes through the guide 1124. The lifting drive 1121 is disposed between the supporting workpiece 1122 and the button support 1123. The lifting end of the lifting drive 1121 is connected to the button support 1123. The first button body is disposed on the support of the button support 1123. Under the action of the lifting drive 1121, the first key body can be inserted into the first mounting hole corresponding to the watch case, thereby realizing the assembly between the watch case and the first key body. In this embodiment, the first housing flipping mechanism 111 with the watch case can reach above the carrying workpiece 1122 under the action of the conveying module 14. It is known that the watch case can be rotated before the first housing flipping mechanism 111 reaches above the carrying workpiece 1122 so that the mounting hole of the watch case is aligned with the corresponding key. Alternatively, the watch case can be flipped after the first housing flipping mechanism 111 reaches above the carrying workpiece 1122 so that the mounting hole of the watch case is aligned with the corresponding key. This is not limited here.

[0158] In another embodiment, the pushing mechanism includes a push drive 1131 and a snap ring limiter 1132, the snap ring limiter 1132 being connected to the movable end of the push drive 1131; the push drive 1131 is configured to drive the snap ring limiter 1132 to translate toward the watch case so that the snap ring is assembled with the first key body.

[0159] The push-drive component 1131 refers to an actuator capable of generating linear motion power, which can be implemented using an electric push rod or a pneumatic slide. Its function is to provide precise translational driving force for the snap ring limiting component 1132. The snap ring limiting component 1132 refers to a mechanical component with a guide groove or positioning structure, which can be implemented using a limiting block with a V-groove. Its function is to physically constrain the snap ring and guide it to move along a set path, ensuring precise alignment of the snap ring and the button assembly position.

[0160] In the first assembly unit 11, the base 10 is provided with a snap ring hopper and a snap ring retrieval robot in the area near the pushing mechanism. Before the snap ring pushing mechanism 113 and the first housing flipping mechanism 111 are aligned, the snap ring retrieval robot takes out the snap ring from the snap ring hopper and assembles it into the snap ring limiting member 1132. Through the automated process, the problem of missing snap rings in the watch case can be avoided.

[0161] Specifically, during the snap ring assembly process, the snap ring retainer 1132 fixes the snap ring's initial position via a guide groove. After the horizontal drive 1131 is activated, it drives the snap ring retainer 1132 to move smoothly in the horizontal direction. When the snap ring retainer 1132 moves to the edge of the mounting hole in the watch case, the snap ring is pushed into the first key body under the guidance of the retainer, completing the mechanical locking between the snap ring and the first key body. During this process, the translational path of the snap ring retainer 1132 remains unchanged from the axis of the watch case mounting hole, preventing the snap ring from deflecting or tilting during assembly.

[0162] In one embodiment of the present invention, the base 10 is provided with a case picking station, a button lifting station and a snap ring pushing station in the first assembly unit 11; the first case flipping mechanism 111 is set corresponding to the case picking station, the lifting mechanism 112 is set corresponding to the button lifting station, and the snap ring pushing station is set corresponding to the snap ring pushing mechanism 113; the conveying module 14 is also configured to convey the case between the case picking station, the button lifting station and the snap ring pushing station.

[0163] In this embodiment, by setting a case picking station, a button lifting station, and a snap ring pushing station in the first assembly unit 11, and by making the first case flipping mechanism 111, the lifting mechanism 112, and the snap ring pushing mechanism 113 correspond one-to-one with each station, and by relying on the conveying module 14 to realize the flow of the case between the stations, an automated assembly system with "clear division of labor and collaborative linkage" is constructed. First, the case picking station, as the assembly starting point, only undertakes the task of grasping the case and adjusting its initial posture. The first case flipping mechanism 111 does not need to take care of the subsequent button assembly action and can focus on stabilizing the case after it is picked up from the tray. Clamping and posture calibration prevent motion interference caused by functional integration, ensuring that the watch case does not fall off or suffer surface damage during the gripping process. The button lifting station focuses on the alignment and assembly of the buttons with the mounting holes in the watch case. The lifting mechanism 112 does not need to consider the initial handling of the watch case; it only needs to precisely control the lifting trajectory of the buttons to ensure that the buttons can be smoothly inserted along the axis of the mounting holes, avoiding alignment deviations caused by too many actions. The snap ring pushing station is specifically responsible for the cooperation and fixation of the snap ring and the buttons. The snap ring pushing mechanism 113 can focus on maintaining the posture of the snap ring and controlling the pushing path to prevent the snap ring from shifting or deforming during assembly. This specialization allows each mechanism to focus its function more effectively, significantly reducing operational errors caused by a single mechanism undertaking multiple tasks, and improving assembly accuracy from the source of the process.

[0164] The automated transfer of watch cases between workstations via the conveyor module 14 completely replaces the manual transfer of watch cases, bringing dual advantages: Firstly, mechanical transfer ensures the positional accuracy of the watch cases during transfer between workstations, avoiding the offset of the watch case reference caused by hand tremors and placement deviations during manual handling. This ensures that when the watch case enters the next workstation, the mounting holes can be accurately aligned with the corresponding mechanism without additional posture adjustments, reducing process time. Secondly, automated transfer enables the coordinated rhythm of each workstation. The transfer speed of the watch cases can be dynamically matched according to the assembly time of each workstation, avoiding the stagnation of a workstation waiting for watch cases to accumulate or having no watch cases to assemble. This makes the production process of the entire assembly unit more continuous and significantly improves the overall assembly efficiency.

[0165] In one embodiment of the present invention, the second assembly unit includes a key body loading subunit 12 and a screw loading subunit 13, the key body loading subunit 12 being connected to the screw loading subunit 13, and the conveying module 14 being configured to convey the watch case from the key body loading subunit 12 to the screw loading subunit 13; the key body loading subunit 12 includes a second housing flipping mechanism 121 and a key body lowering mechanism 122, and the screw loading subunit 13 includes a third housing flipping mechanism 131, a watch case fixing fixture 132, and a screw loading mechanism 133; the second The housing flipping mechanism 121 is configured to flip and rotate the watch case so that the second mounting hole of the watch case is aligned with the lifting end of the key body lowering mechanism 122. The key body lowering mechanism 122 is configured to drive the second key body 2 located at the lifting end to assemble into the second mounting hole of the watch case. The third housing flipping mechanism 131 is configured to receive the watch case and convey it to the watch case fixing fixture 132. The watch case fixing fixture 132 is configured to switch the watch case to a screw feeding posture. The screw feeding mechanism 133 is configured to assemble the screws into the key bracket for assembly with the second key body 2.

[0166] In this embodiment, the second housing flipping mechanism 121 is the core component for achieving precise adjustment of the watch case's posture. It can be composed of multi-stage rotating joints and a clamping mechanism. Its core function is to receive the watch case transferred by the conveying module 14 and adjust the watch case's posture through mechanical actions so that the second mounting hole of the watch case is aligned with the lifting end of the key body lowering mechanism 122. The multi-stage rotating joints are driven by servo motors, enabling the watch case to flip (e.g., from a horizontal posture to a vertical posture) and fine-tune rotation (rotation angle accuracy ≤ 0.1°), ensuring that the coaxiality error between the second mounting hole and the positioning structure of the key body lowering mechanism 122 is within an acceptable error range. The clamping mechanism fixes the watch case with a constant clamping force of 6-10N, preventing the watch case from falling off and avoiding damage to the surface coating or structure of the watch case, maintaining the stability of the watch case's posture until the key body embedding process is completed.

[0167] The key lowering mechanism 122 is responsible for smoothly embedding the second key 2 into the second mounting hole of the watch case. It can be composed of lowering drive components such as servo cylinders and linear motors, guide components such as linear slide rails and sliders, and key positioning fixtures. The key positioning fixture fixes the second key 2 through contour grooves and vacuum adsorption to prevent the key from shifting or falling off; the guide components ensure the straightness of the fixture during the lifting process to avoid skew during key embedding; the servo cylinder can precisely control the lowering speed and thrust, which can ensure that the key is fully embedded in the hole and prevent excessive torque from deforming the key or watch case. After embedding, the fixture releases the vacuum and resets, waiting for the next operation.

[0168] The third housing flipping mechanism 131 undertakes the dual tasks of housing transfer and initial posture adjustment. Structurally, it continues the design of multi-stage rotating joints and clamping mechanisms, but its function focuses more on "connectivity" and "adaptability". Its core function is to receive the housing with the second key body 2 embedded in it from the conveying module 14, quickly grasp it, and drive the housing to complete a second flip, so that the screw holes of the key bracket are aligned with the direction of the electric screwdriver bit of the screw feeding mechanism 133. This provides a precise torque transmission path for subsequent screw locking, while ensuring that the housing posture does not shift during the transfer process and avoiding screw hole misalignment.

[0169] The watch case fixing fixture 132 is a key guarantee for the stability of the watch case when the screws are tightened. Designed to meet the "torque resistance" requirement, it has multi-point clamping and precise positioning functions. When the third case flipping mechanism 131 puts the watch case into the fixture, the fixture applies clamping force through multiple movable jaws and barbs to counteract the counter-torque when the screws are tightened and prevent the watch case from rotating with the screwdriver.

[0170] The screw feeding mechanism 133 is responsible for the screening, feeding, and precise tightening of screws. It can consist of screws, a feeding tube, and an electric screwdriver. Defective screws are screened by vibration, and qualified screws are sorted with their heads facing forward and blown to the screwdriver bit through the feeding tube. The electric screwdriver uses magnetic attraction to hold the screw, moves it to the front of the screw hole, and then advances it axially. When the tightening action begins, a torque sensor monitors the torque in real time. Once the set value is reached, it automatically stops and rotates in the opposite direction a preset number of times. If the torque is abnormal, an alarm is triggered to ensure the quality of screw tightening.

[0171] After the watch case enters the second assembly unit, the second case flipping mechanism 121 of the key body loading subunit 12 first grabs the watch case from the conveying module 14. By adjusting the posture, the second mounting hole is aligned with the lifting end of the key body lowering mechanism 122. Then, the positioning fixture of the key body lowering mechanism 122 descends smoothly along the guide assembly under the drive of the servo electric cylinder, embedding the second key body 2 into the second mounting hole at a set speed and thrust. After the key body is embedded, the watch case is transferred to the screw loading subunit 13 through the conveying module 14. The third case flipping mechanism 131 quickly grabs the watch case and flips it to... The screw is placed into the watch case fixing fixture 132, which is used to fix the watch case with multi-point clamping and positioning pins. Then, the screw feeding mechanism 133 selects and feeds the screw to the electric screwdriver bit. After the bit picks up the screw, it is aligned with the screw hole and the tightening action is started. The torque sensor monitors and ensures the locking quality. After the screw assembly is completed, the watch case fixing fixture 132 releases the clamps, and the third housing flipping mechanism 131 sends the watch case back to the conveying module 14 for transfer to the next stage. The entire process achieves automated and high-precision assembly of the second button through the precise cooperation of each mechanism.

[0172] In one embodiment of the present invention, the first housing flipping mechanism 111 and the second housing flipping mechanism 121 both include a first flipping part 1111 and a rotating part 1112. The rotating part 1112 is fixedly disposed on the first flipping part 1111 and is configured to fix the watch case. The first flipping part 1111 is used to flip the watch case so that the watch case switches from a flat position to a first upright position. The rotating part 1112 is used to rotate the watch case so that in the first upright position, the insertion port of the first mounting hole faces the lifting mechanism 112, or the insertion port of the second mounting hole faces the key body lowering mechanism 122.

[0173] In this embodiment, both the first housing flipping mechanism 111 and the second housing flipping mechanism 121 include a first fixing part 1114, a first rotating shaft 1113, a first flipping part 1111, a rotating part 1112, and a driving component. The first fixing part 1114 provides a fixed foundation for other components of the two housing flipping mechanisms and can also fixally connect the conveying module 14, thereby realizing the transfer of the watch case between different workstations. Specifically, the first fixing part 1114 can be composed of multiple sheet metal parts or a single component, which can be connected to different structures by opening slots, holes, protrusions, etc. The first fixing part 1114 is provided with a shaft hole, and the first rotating shaft 1113 is inserted into the shaft hole of the fixing part. The first flipping part 1111 is connected to the first rotating shaft 1113. When the driving component is running, the first rotating shaft 1113 drives the first flipping part 1111 to flip, so that the watch case switches from a flat position to a first upright position, that is, from a flat position to a first upright position. Figure 3 The status shown has switched to Figure 4 In the state shown, the axes of the first and second mounting holes of the watch case change from parallel to intersecting with the surface of the base 10. Then, the rotating part 1112 drives the case to rotate at a preset angle or the rotation angle is fed back by the positioning camera so that the insertion ports of the first and second mounting holes are aligned with the first key body or the second key, so that the first key body or the second key can be inserted into the corresponding mounting hole, thereby realizing the assembly of the key body and the watch face.

[0174] In one embodiment, the rotating part 1112 has two clamping arms that can move closer to or further away from each other. The two clamping arms are simultaneously inserted into the hollow area of ​​the watch case and then cooperate with the inner peripheral wall of the watch case, thereby fixing the rotating part 1112 to the watch case. Alternatively, the rotating part 1112 is designed to adapt to the specific shape and size of the watch case so that the rotating part 1112 can extend into the hollow area of ​​the watch case and then cooperate with the inner peripheral wall of the watch case, thereby fixing the rotating part 1112 to the watch case. Alternatively, to facilitate the insertion of the first key and the second key 2, the clamping arms of the rotating part 1112 act on the outer peripheral surface of the watch case, thereby avoiding structural interference when the first key and the second key 2 are inserted. The rotating part 1112 can rotate under the drive of a rotating motor, thereby aligning the mounting holes of the watch case at different positions in the vertical posture with the lifting mechanism 112 of the first assembly unit 11 or the key lowering mechanism 122 of the second assembly unit.

[0175] It is understood that the flat orientation proposed in this invention refers to the orientation in which the axis of the first mounting hole or the second mounting hole of the watch case is parallel to the surface of the base 10. The flat orientation can be the front of the watch case facing the surface of the base 10, or the back of the watch case facing the surface of the base 10. The first vertical orientation and the second vertical orientation refer to the orientation in which the axis of the first mounting hole or the second mounting hole of the watch case intersects with the surface of the base 10. When it is necessary to assemble the key, the rotation of the rotating part 1112 makes the axis of the first mounting hole or the second mounting hole perpendicular to the surface of the base 10 or form a specific angle with the surface of the base 10 so that the key body can be inserted.

[0176] In one embodiment of the present invention, the third housing flipping mechanism 131 includes a second flipping part 1311 and a locking part 1312, the locking part 1312 being disposed on the flipping part; the second flipping part 1311 is used to flip the watch case so that the watch case switches from a flat position to a second upright position, and the locking part 1312 has at least two locking members that can approach and move away from each other, each locking member being configured to abut against the inner circumferential surface of the watch case and offset the second key body 2 and the key support.

[0177] In this embodiment, the third housing flipping mechanism 131 includes a second fixing part 1314, a second rotating shaft 1313, a second flipping part 1311, a locking part 1312, and a driving component. The second fixing part 1314 provides a fixed foundation for other components of the third housing flipping mechanism 131 and can also fix the conveying module 14, thereby realizing the transfer of the watch case between different workstations. Specifically, the second fixing part 1314 can be assembled from multiple sheet metal parts or be a separate component, which can be connected to different structures by opening slots, holes, protrusions, etc. The second fixing part 1314 is provided with a shaft hole, and the second rotating shaft 1313 is inserted into the shaft hole of the second fixing part 1314. The locking part 1312 is connected to the second rotating shaft 1313. When the driving component is running, the second rotating shaft 1313 drives the second flipping part 1311 to flip, so that the watch case switches from a flat position to a second upright position.

[0178] Please see details. Figure 10 The locking part 1312 includes four locking members, which are spaced apart along the circumference. This creates a multi-point clamping area and a uniform clamping force when clamping the watch case. Specifically, two aligned locking members are inserted into the hollow area of ​​the watch case to abut against the inner circumferential surface of the watch case, while the other two aligned locking members are shorter in length to abut against the inner end face of the watch case. Thus, the multiple spaced locking members can completely avoid the first key body, the second key body 2, and the key bracket, preventing the pre-assembled parts from changing their posture. It is understood that in the subsequent screw-driving process, it is necessary to ensure the positional accuracy between the screw holes on the watch case and the bit of the screw feeding mechanism 133. Therefore, after the watch case is transported to the watch case fixing fixture 132, a high-precision posture fine-tuning is required. Therefore, for the third housing flipping mechanism 131, it is only necessary to ensure that the watch case can be placed in the watch case fixing fixture 132, and there is no need to set up a rotating part 1112 for posture adjustment.

[0179] In one embodiment of the present invention, the watch case fixing fixture 132 includes a watch case support member and a watch case locking part, the watch case locking part being disposed on the watch case support member; the watch case locking part having at least two locking members that can approach and move away from each other, each locking member being configured to abut against the inner circumferential surface of the watch case and offset the second key body 2 and the key support; the watch case locking part being configured to switch the watch case from a second upright posture to a screw loading posture.

[0180] 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 part 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.

[0181] After the watch case carrier is placed on the watch case, the watch 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, thereby forming a clamping effect on the watch case. At the same time, during the movement of the locking parts, there will be at least a period of contact with the watch case. Therefore, after the locking parts move into place, they can change the posture of the watch case on the watch case carrier, thereby forcing the watch case into the screw-loading posture.

[0182] In one embodiment of the present invention, please refer to Figure 8 The screw feeding subunit 13 is provided with a case picking station and a case locking station. The third case flipping mechanism 131 is set in accordance with the case picking station, and the screw feeding mechanism 133 is set in accordance with the case locking station. The screw feeding subunit 13 has a case docking state. In the case docking state, the locking part 1312 is directly opposite the locking surface of the case carrier.

[0183] In this embodiment, the third housing flipping mechanism 131 is set corresponding to the housing picking station so that the housing picking station receives the housing located in the third housing flipping mechanism 131, and the screw feeding mechanism 133 is set corresponding to the housing locking station so as to perform the screwing process; during this process, the housing fixing fixture 132 moves between the housing picking station and the housing locking station to realize the transfer of the housing; wherein, when the housing fixing fixture 132 receives the housing from the third housing flipping mechanism 131, the locking part 1312 of the third housing flipping mechanism 131 is directly facing the locking surface of the housing carrier, so that when the housing is transferred, the housing in the second vertical position can be prevented from changing its posture.

[0184] In one embodiment of the present invention, the second housing flipping mechanism 121 further includes a key body abutting portion, which is fixedly disposed on the first flipping portion 1111 and / or the rotating portion 1112; the key body abutting portion is configured to abut against the second key body 2 located on the watch case.

[0185] In this embodiment, the key body abutting portion protrudes from the surface of the first flipping portion 1111 and / or the rotating portion 1112. When the rotating portion 1112 clamps the watch case, the key body abutting portion can abut against the second key body 2 located on the watch case. This is because when the watch case needs to flow from the key body loading subunit 12 to the screw loading subunit 13, in order to facilitate the stable flow of the watch case, the watch case needs to flow in a flat position. However, the second key body and the key support on the watch case have not yet been locked by screws, and the watch case is in the first vertical position. Therefore, the watch case needs to switch from the first vertical position to the flat position. That is, the first flipping part 1111 rotates, and the second key body is prone to shift or fall off due to gravity or centrifugal force during the flipping process. Therefore, by setting the key body abutting part, the posture of the second key body 2 on the watch case can be constrained at all times, and the position of the second key body 2 relative to the key support can be avoided during the flipping process of the watch case. It can be understood that the key body abutting part can be a protruding structure, which can limit the second key body 2 through multi-point contact, or it can include multiple L-shaped limiting blocks so that part of the structure of the second key body 2 can be inserted into the key body abutting part. The shape of the key body abutting part is not limited.

[0186] This invention also proposes a wristband device assembly bus, which includes all the watch case assembly lines described above. The watch case assembly lines are used to implement the aforementioned watch case assembly method. Specifically, the wristband device assembly bus includes watch case assembly lines, display screen assembly lines, watch dial assembly lines, etc. By using an automated wristband device assembly bus, efficient and precise assembly is achieved. The specific structure of the watch case assembly lines 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.

[0187] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A method of assembling a watch case and a key assembly, the watch case comprising a first mounting hole, a second mounting hole, and a key support, the key support being disposed in alignment with the second mounting hole, the key assembly comprising a first key and a second key, the method comprising: positioning the first key in the first mounting hole; and positioning the second key in the second mounting hole. The second key includes a second key body and a screw, a shell assembly line body is provided, a base of the shell assembly line body includes a first shell overturning mechanism, a jacking mechanism, a clasp spring pushing mechanism, a second shell overturning mechanism, a third shell overturning mechanism, a key body lowering mechanism and a screw feeding mechanism, the second shell overturning mechanism includes a overturning part and a rotating part, the rotating part is fixedly arranged on the overturning part, the shell assembly line body further includes a watch case fixing tool; the watch case assembly method includes: Controlling the first shell overturning mechanism to drive the watch case into a first pre-assembly posture; Controlling the jacking mechanism and the clasp spring pushing mechanism to assemble the first key to the watch case through the first mounting hole; Controlling the rotating part to obtain a watch case in a flat posture; Controlling the overturning part to rotate in a first preset rotation direction, so that the watch case is switched from the flat posture to an upright posture; Controlling the rotating part of the second shell overturning mechanism to rotate in a third preset rotation direction, so that the watch case enters a second pre-assembly posture from the upright posture, in the second pre-assembly posture, the insertion port of the second mounting hole faces away from the base; Controlling the second shell overturning mechanism to align the key body lowering mechanism, so that the second mounting hole is aligned with the second key body of the key body lowering mechanism; Controlling the key body lowering mechanism to drive the second key body to be assembled to the watch case through the second mounting hole; Controlling the third shell overturning mechanism to drive the watch case into a third pre-assembly posture; Controlling the watch case fixing tool to obtain a watch case in a third pre-assembly posture, and driving the watch case to switch to a screw shell posture; Controlling the screw feeding mechanism to assemble the screw to the key support and the second key; Wherein, the first key and the second key are assembled step by step on the watch case.

2. The method of assembling a watch case according to claim 1, wherein, The step of controlling the first shell overturning mechanism to drive the watch case into a first pre-assembly posture includes: Controlling the first shell overturning mechanism to obtain a watch case in a flat posture; Controlling the first shell overturning mechanism to drive the shell to move in a first preset direction, so that the watch case is switched from the flat posture to the first pre-assembly posture.

3. The method of assembling a watch case according to claim 2, wherein, The first shell overturning mechanism includes an overturning part and a rotating part, the rotating part is fixedly arranged on the overturning part; the step of controlling the first shell overturning mechanism to drive the shell to move in a first preset direction, so that the watch case is switched from the flat posture to the first pre-assembly posture includes: Controlling the overturning part to rotate in a first preset rotation direction, so that the watch case is switched from the flat posture to an upright posture; Controlling the rotating part to rotate in a second preset rotation direction, so that the watch case enters the first pre-assembly posture from the upright posture, in the first pre-assembly posture, the insertion port of the first mounting hole faces the base.

4. The method of assembling a watch case according to claim 3, wherein, The first key includes a first key body and a clasp spring, the step of controlling the jacking mechanism and the clasp spring pushing mechanism to assemble the first key to the watch case through the first mounting hole includes: Controlling the first shell overturning mechanism to align the jacking mechanism, so that the first mounting hole is aligned with the first key body of the jacking mechanism; Controlling the jacking mechanism to drive the first key to be assembled to the watch case through the first mounting hole; Controlling the first shell overturning mechanism to align the spring push mechanism, so that the first key body is aligned with the spring of the spring push mechanism; Controlling the spring push mechanism to drive the spring to be assembled to the first key body through the first mounting hole, so that the first key is assembled with the watch case.

5. The method of assembling a case as claimed in claim 1, wherein, The watch case fixing tool includes a watch case carrier and a watch case locking part; the step of controlling the watch case fixing tool to obtain the watch case in the third pre-assembly posture and drive the watch case to switch to the screw-on case posture, includes: Controlling the third shell overturning mechanism to align the watch case carrier; Controlling the watch case carrier to obtain the watch case in the third pre-assembly posture; Controlling the watch case locking part to adjust the posture of the watch case, so that the watch case switches to the screw-on case posture.

6. A wristband device assembly bus, comprising: The wrist strap device assembly bus includes a shell assembly line body; the shell assembly line body is used for the watch case assembly method in any one of claims 1 to 5.

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