A power bank for watches and its usage method

CN122951278APending Publication Date: 2026-10-20SHENZHEN DOCHION TECH CO LTD
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Patent Information

Application Number
CN202611354776.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-09-03
Publication Date
2026-10-20

AI Technical Summary

Technical Problem

[0005]针对现有技术的不足,本发明提供了一种用于手表的充电宝及其使用方法,解决了现有便携式手表充电设备连接不牢固,在使用者穿戴状态下受到手臂活动或外界摩擦碰撞时,充电设备与手表脱离导致充电中断的问题

Benefits of technology

[0022]1、本发明通过向下压动定位环至闭合位置时,定位环底部的卡爪进入支臂的插孔内部并与卡块卡合,同时定位孔随定位环转动至与插接柱对齐,弹簧会随之推动挡环,带动插接柱贯穿外壳插入定位孔内,通过插接柱的横向穿插与卡爪的纵向倒扣形成双重限位,避免定位环在穿戴状态下因手臂晃动或碰撞产生松动,保证了充电宝与智能手表绑定的稳定。

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Abstract

This invention relates to the field of watch power bank technology, and discloses a power bank for watches and its usage method, including a casing and a smartwatch. A fixing mechanism is provided on the rear side of the casing, the fixing mechanism including a positioning ring rotatably connected to the top rear end of the casing. Claws are fixedly connected to the left and right sides of the bottom of the positioning ring. Support arms are fixedly connected to the left and right ends of the bottom rear side of the casing. An insertion hole is opened on the rear side of the top of the support arm, and a locking block is fixedly connected to the rear side of the insertion hole. The locking block engages with the claws. When the positioning ring is pressed down to the closed position, the claws at the bottom of the positioning ring enter the insertion hole of the support arm and engage with the locking block. Simultaneously, the positioning hole rotates with the positioning ring until it aligns with the insertion post. A spring then pushes a retaining ring, causing the insertion post to penetrate the casing and insert into the positioning hole. The lateral insertion of the insertion post and the longitudinal locking of the claws form a double limiting mechanism.
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Description

Technical Field

[0001] This invention relates to the field of watch power bank technology, specifically to a power bank for watches and its usage method. Background Technology

[0002] A smartwatch is a wearable smart terminal device that integrates a display module, micro-sensor components, and a communication control motherboard. When worn on the wrist, it enables users to collect human vital signs data, monitor movement trajectories, and receive terminal information. It is widely used in daily wear and outdoor activities.

[0003] Due to the limited overall size of smartwatches, the internal battery capacity is generally small. When the real-time monitoring function is turned on for a long time or when it is used frequently, the battery is consumed quickly and needs to be charged regularly to maintain the operation of the device. Conventional charging devices are mostly magnetic cables or fixed charging docks, which rely on the contact of conductive contacts to transfer power from the external power source to the watch's battery.

[0004] Currently available portable power banks have an internal battery and a magnetic charging module on the surface. When in use, the power bank uses the magnetic force generated by the module to attract the watch to the metal area on the back of the watch, causing the charging contacts to come together for power supply. However, existing watch power banks only use unidirectional magnetism to attract themselves to the watch, resulting in a weak connection. If users need to use the power bank while on the go, they must remove the watch from their wrist and place it with the power bank. If the power bank is attached while the watch is worn, everyday arm movements can cause the magnetic structure to misalign and detach, resulting in charging interruption or even the power bank falling and being damaged. Therefore, it is impossible to achieve a secure connection between the power bank and the watch while the watch is being worn. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a power bank for watches and its usage method, solving the problem that existing portable watch charging devices are not securely connected and that charging is interrupted when the user experiences arm movement or external friction and impact.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a power bank for a smartwatch, comprising a casing and a smartwatch, wherein a fixing mechanism is provided on the rear side of the casing and a charging mechanism is provided on the bottom of the smartwatch;

[0007] The fixing mechanism includes a positioning ring, which is rotatably connected to the top rear end of the housing. The positioning ring is fixedly connected to the left and right sides of its bottom. The bottom left and right ends of the rear side of the housing are fixedly connected to support arms. The support arms have an insertion hole on the top rear side. A locking block is fixedly connected to the rear side of the insertion hole. The locking block engages with the locking claw.

[0008] Preferably, the fixing mechanism further includes a button, which is located at the top center of the right side of the housing. A plug-in post is fixedly connected to the left side of the button. A positioning hole is provided on the right side of the positioning ring. The outer side of the plug-in post penetrates the housing and is plugged into the positioning hole. An anti-loosening component is provided on the outer side of the plug-in post.

[0009] Preferably, the charging mechanism includes a base, which is fixedly connected to the top of the support arm. A first contact head is fixedly connected to the top of the base, and a second contact head is fixedly connected to the bottom of the smartwatch. The second contact head is in contact with the first contact head.

[0010] Preferably, the anti-loosening component includes a hole, which is opened inside the right side wall of the housing. A retaining ring is fixedly connected to the outer side of the plug post, and a spring is sleeved on the outer wall of the plug post. The left and right ends of the spring abut against the retaining ring and the inner wall of the hole, respectively.

[0011] Preferably, the charging mechanism further includes a lithium battery, which is fixedly connected to the inside of the housing and electrically connected to the contact head.

[0012] Preferably, the charging mechanism further includes a charging port, which is installed on the front right wall of the housing and is electrically connected to the lithium battery.

[0013] Preferably, the outer casing has a hanging opening on the right front side.

[0014] Preferably, the claw is a plastic part, the rear side of the bottom end of the claw has an outward protruding hook-shaped structure, the upper and lower ends of the block are provided with inclined surfaces, and the bottom of the claw slides and abuts against the inclined surface of the block.

[0015] Preferably, the base has an upwardly convex elongated structure, and the number of contact heads is two, which are respectively disposed at the front and rear ends of the top of the base.

[0016] A method for using a power bank for a watch includes the following steps:

[0017] S1. By pulling the button, the button moves the plug-in pin towards the hole, and the retaining ring compresses the spring, causing the plug-in pin to exit the positioning hole on the side of the positioning ring, releasing the rotation restriction on the positioning ring. Then, the positioning ring is pushed upward, and the claw is squeezed by the inclined surface at the lower end of the locking block, causing it to elastically deform outward and disengage from the plug-in hole, thereby flipping the positioning ring upward along the top of the outer shell to open it.

[0018] S2. Place the smartwatch on the front of the casing, rotate it downwards and press the positioning ring. The claw at the bottom of the positioning ring moves downwards into the insertion hole. The bottom end of the claw contacts the inclined surface at the top of the block and undergoes elastic deformation to retract. After passing the block, it rebounds and engages with the block. At the same time, the positioning ring closes, causing the positioning hole to rotate to the position aligned with the insertion post. The spring then pushes the retaining ring, causing the insertion post to be inserted into the positioning hole, thus locking the positioning ring.

[0019] S3. As the positioning ring presses down, the smartwatch is simultaneously squeezed downward by the positioning ring, causing the second contact head at the bottom of the smartwatch to abut against the surface of the first contact head on the top base of the support arm. The electrical energy generated by the lithium battery inside the casing is transmitted to the inside of the smartwatch for charging through the first and second contact heads in sequence.

[0020] S4. When the lithium battery inside the casing is depleted, the lithium battery is replenished by connecting an external power source to the charging port on the surface of the casing.

[0021] This invention provides a power bank for watches and its usage method. It has the following beneficial effects:

[0022] 1. When the positioning ring is pressed down to the closed position, the claw at the bottom of the positioning ring enters the insertion hole of the support arm and engages with the locking block. At the same time, the positioning hole rotates with the positioning ring until it aligns with the insertion post. The spring will then push the retaining ring, causing the insertion post to pass through the outer shell and insert into the positioning hole. The horizontal insertion of the insertion post and the vertical locking of the claw form a double limit, preventing the positioning ring from loosening due to arm shaking or collision during wear, thus ensuring the stability of the binding between the power bank and the smartwatch.

[0023] 2. In this invention, when the positioning ring is closed and the smartwatch is pressed, the second contact head at the bottom of the smartwatch abuts against the surface of the first contact head under pressure. The continuous squeezing force eliminates the gap between the contacts, allowing the lithium battery inside the casing to transmit power and avoiding power outages caused by relative sliding or poor connection of the contacts during daily wear and movement. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present invention;

[0025] Figure 2 This is a schematic diagram of the smartwatch structure of the present invention;

[0026] Figure 3 This is a partial rear view of the structure of the present invention;

[0027] Figure 4 This is a partial structural illustration of the present invention;

[0028] Figure 5 This is a partial structural cross-sectional view of the present invention;

[0029] Figure 6 This is a partial structural breakdown diagram of the present invention;

[0030] Figure 7 for Figure 6 Enlarged view of point A in the image;

[0031] Figure 8 This is a cross-sectional view of the outer shell structure of the present invention.

[0032] The components are as follows: 1. Outer shell; 2. Fixing mechanism; 21. Positioning ring; 22. Claw; 23. Support arm; 24. Insertion hole; 25. Locking block; 26. Insertion post; 27. Button; 28. Positioning hole; 29. ​​Anti-loosening component; 291. Hole; 292. Retaining ring; 293. Spring; 3. Charging mechanism; 31. Base; 32. Contact head one; 33. Contact head two; 34. Lithium battery; 35. Charging port; 4. Smartwatch; 5. Hanging port. Detailed Implementation

[0033] The technical solutions in 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Reference Figure 5 , Figure 6 and Figure 7 This invention provides a power bank for a watch, including a housing 1 and a smartwatch 4. A fixing mechanism 2 is provided on the back of the housing 1, and a charging mechanism 3 is provided on the bottom of the smartwatch 4.

[0035] The fixing mechanism 2 includes a positioning ring 21, which is rotatably connected to the top rear end of the outer casing 1. Claws 22 are fixedly connected to the left and right sides of the bottom of the positioning ring 21. Support arms 23 are fixedly connected to the left and right ends of the bottom rear side of the outer casing 1. An insertion hole 24 is provided on the rear side of the top of the support arm 23. A locking block 25 is fixedly connected to the rear side of the insertion hole 24. The locking block 25 engages with the claws 22. Engaging the claws 22 with the locking block 25 initially fixes the positioning ring 21. The fixing mechanism 2 also includes a button 27, which is located at the top center of the right side of the outer casing 1. A plug-in post 26 is fixedly connected to the left side of the button 27. A positioning hole 28 is provided on the right side of the positioning ring 21. The outer side of the plug-in post 26 penetrates the outer casing 1 and connects to the positioning hole. The 28-phase plug-in connection allows the plug-in pin 26 to be inserted into the positioning hole 28 to lock the positioning ring 21. An anti-loosening component 29 is provided on the outside of the plug-in pin 26. The anti-loosening component 29 includes a hole 291, which is opened in the right side wall of the outer shell 1. A retaining ring 292 is fixedly connected to the outside of the plug-in pin 26. A spring 293 is sleeved on the outer wall of the plug-in pin 26. The left and right ends of the spring 293 abut against the inner walls of the retaining ring 292 and the hole 291, respectively. The claw 22 is made of plastic. The rear side of the bottom end of the claw 22 has an outwardly protruding hook-shaped structure. The upper and lower ends of the block 25 are provided with inclined surfaces. The bottom of the claw 22 slides against the inclined surface of the block 25. The inclined surfaces facilitate the fixing of the claw 22 and the block 25.

[0036] Specifically, when it is necessary to secure the smartwatch 4, first pull button 27. Button 27 pushes the plug pin 26 to the right. At this time, the retaining ring 292 compresses the spring 293 to the right, causing it to retract. The left end of the plug pin 26 then exits from the positioning hole 28 on the right side of the positioning ring 21, releasing the rotation restriction on the positioning ring 21. Then, the positioning ring 21 can be rotated upwards to open it. After placing the smartwatch 4 on top of the support arm 23, the positioning ring 21 can be rotated downwards to close it. The two claws 22 at the bottom of the positioning ring 21 are then inserted downwards into the corresponding plug holes 24. Inside, because the claw 22 is made of plastic, it has a certain elastic deformation capability. When the hook-shaped structure at the bottom moves downward, it slides and deforms inward along the inclined surface at the top of the locking block 25. After passing the locking block 25, the claw 22 springs back outward to restore its original shape, so that the hook-shaped part of the claw 22 just hooks onto the bottom of the locking block 25 to complete the engagement. Finally, when the finger is released, the elastic force of the spring 293 pushes the retaining ring 292 to reset, so that the insertion post 26 is reinserted into the positioning hole 28, realizing the anti-loosening lock and preventing the positioning ring 21 from accidentally popping out during carrying.

[0037] Reference Figure 2 , Figure 3 and Figure 8The charging mechanism 3 includes a base 31, which is fixedly connected to the top of the support arm 23. A first contact head 32 is fixedly connected to the top of the base 31, and a second contact head 33 is fixedly connected to the bottom of the smartwatch 4. The second contact head 33 contacts the first contact head 32, and electrical energy is transmitted through the contact between the second contact head 33 and the first contact head 32. The charging mechanism 3 also includes a lithium battery 34, which is fixedly connected to the inside of the outer shell 1 and is electrically connected to the first contact head 32. The charging mechanism 3 also includes a charging port 35, which is installed on the front right wall of the outer shell 1 and is electrically connected to the lithium battery 34. The base 31 has an upwardly protruding elongated structure. There are two first contact heads 32, which are respectively located at the front and rear ends of the top of the base 31. The first contact head 32 is used to transmit electrical energy.

[0038] Specifically, when the fixing mechanism 2 closes and locks the positioning ring 21, the positioning ring 21 presses down on the smartwatch 4, causing the second contact head 33 at the bottom of the smartwatch 4 to be squeezed and tightly attached to the first contact head 32 at the top of the base 31. The elongated protruding base 31 and the two first contact heads 32 ensure the fit of the contact surfaces when pressed down, avoiding gaps caused by vibration. At this time, the electrical energy stored inside the lithium battery 34 inside the outer shell 1 is transmitted to the first contact head 32 through the internal wires, and then inputs electrical energy into the smartwatch 4 through the second contact head 33 to maintain its operation. When the lithium battery 34 is depleted, the end of the external power supply cable is inserted into the charging port 35 to input and store external electrical energy into the lithium battery 34.

[0039] Reference Figure 1 and Figure 4 The outer casing 1 has a hanging slot 5 on the front right side;

[0040] Specifically, in scenarios where the power bank itself is carried daily without needing to charge the smartwatch 4, the connecting end of the external lanyard or metal buckle can be passed through the inside of the hanging opening 5 and tied to secure the outer shell 1 to the outside of the user's backpack or clothing, making it easy to carry while moving.

[0041] Example 2:

[0042] A method for using a power bank for a watch includes the following steps:

[0043] S1. By pulling button 27, button 27 moves plug pin 26 toward hole 291. The retaining ring 292 compresses spring 293, causing plug pin 26 to exit the positioning hole 28 on the side of positioning ring 21, releasing the rotation restriction on positioning ring 21. Then, the positioning ring 21 is pushed upward. The claw 22 is squeezed by the inclined surface of the lower end of the locking block 25, and undergoes outward elastic deformation to retract and disengage from the plug hole 24, thereby flipping the positioning ring 21 upward along the top of the outer shell 1 to open it.

[0044] S2. Place the smartwatch 4 on the front side of the casing 1, rotate it downwards and press the positioning ring 21. The claw 22 at the bottom of the positioning ring 21 enters the insertion hole 24 downwards. The bottom end of the claw 22 contacts the inclined surface at the top of the block 25 and undergoes elastic deformation to retract. After passing the block 25, it rebounds and engages with the block 25. At the same time, the positioning ring 21 closes, causing the positioning hole 28 to rotate to the position aligned with the insertion post 26. The spring 293 then pushes the retaining ring 292, causing the insertion post 26 to be inserted into the positioning hole 28, thus locking the positioning ring 21.

[0045] S3. While the positioning ring 21 is pressed down, the smart watch 4 is simultaneously squeezed downward by the positioning ring 21, causing the second contact head 33 at the bottom of the smart watch 4 to abut against the surface of the first contact head 32 on the top base 31 of the support arm 23. The electrical energy generated by the lithium battery 34 inside the shell 1 is transmitted to the inside of the smart watch 4 for charging through the first contact head 32 and the second contact head 33 in sequence.

[0046] S4. When the lithium battery 34 inside the casing 1 is depleted, the lithium battery 34 is replenished by connecting an external power source to the charging port 35 on the surface of the casing 1.

[0047] As a preferred embodiment, the first contact head 32 on the base 31 and the second contact head 33 on the bottom of the smartwatch 4 are multi-contact structures that support pin multiplexing. When the positioning ring 21 closes and locks to make the first contact head 32 and the second contact head 33 abut, the lithium battery 34 not only outputs electrical energy, but its power status signal is also transmitted to the inside of the smartwatch 4 through the communication link formed by the first contact head 32 and the second contact head 33. After receiving the electrical signal, the main controller of the smartwatch 4 directly calls its native display system to perform UI rendering, and displays the real-time remaining power of the lithium battery 34 inside the casing 1 on the watch screen. By relying on the existing communication link, the need to add an independent digital display screen and openings to the casing of the power bank is eliminated. The information loop between devices is opened through data interaction, which reduces hardware manufacturing costs and maintains the overall structural airtightness of the casing 1.

[0048] As another preferred implementation, the smartwatch 4 integrates a communication module for data interaction with an external electric vehicle. The main controller of the smartwatch 4 is configured to obtain and display the remaining battery power of the external electric vehicle in real time through this communication module. In actual riding scenarios, the smartwatch 4 continuously maintains a communication link with the electric vehicle and refreshes the battery power data frequently, which increases its own operating power consumption. At this time, by pressing down and closing the positioning ring 21 of the outer shell 1, the power bank and the smartwatch 4 are firmly bound together by the double limiting structure of the present invention, so that the first contact head 32 and the second contact head 33 remain stably in contact even under bumpy riding conditions. Thus, the lithium battery 34 inside the outer shell 1 provides uninterrupted power supply to the smartwatch 4, effectively supporting the high power consumption state of the smartwatch 4 throughout the riding process and avoiding the loss of vehicle data connection caused by the watch running out of power during the ride.

[0049] Working principle:

[0050] When using this power bank to charge and secure the smartwatch 4, first place the smartwatch 4 on the front side of the casing 1, then press down on the positioning ring 21, which is rotatably connected to the top rear end of the casing 1. When the positioning ring 21 rotates downward, it will cause the claw 22 to insert into the socket 24. Since the claw 22 is made of plastic, when the claw 22 moves downward, the hook-like structure protruding outward from its bottom rear side will slide and abut against the inclined surface on the top front side of the block 25. The inclined surface of the block 25 will squeeze the claw 22, causing it to elastically deform and retract. When the hook-like structure at the bottom of the claw 22 passes the inclined surface of the block 25, the claw 22 elastically recovers and rebounds, thus engaging with the block 25. At the same time, when the positioning ring 21 rotates downward to the fully closed position, the positioning hole 28 on the right side of the positioning ring 21 rotates accordingly. Move the device to the position aligned with the plug 26. At this time, the spring 293 pushes the retaining ring 292 to the right, thereby causing the plug 26 to pass through the outer shell 1 and insert into the positioning hole 28, locking the position of the positioning ring 21. This prevents the positioning ring 21 from loosening and popping out due to arm vibration when wearing the smartwatch 4. Finally, when it is necessary to disassemble the smartwatch 4, pull the button 27 at the top of the middle right side of the outer shell 1. The button 27 is forced to move to the right and causes the plug 26 to move into the hole 291. The retaining ring 292 then compresses the spring 293, causing the plug 26 to exit the positioning hole 28 and unlock. At this time, push the positioning ring 21 upward. The hook-shaped structure at the bottom of the claw 22 is subjected to force and deforms outward under the pressure of the inclined surface at the lower end of the block 25, so that the positioning ring 21 can be fully opened.

[0051] During the process of the positioning ring 21 being pressed downwards and the claw 22 engaging and fixing with the block 25, the smartwatch 4 is synchronously pressed downwards by the positioning ring 21. When the smartwatch 4 moves downwards, the second contact head 33 at the bottom will abut against the surface of the first contact head 32 on the base 31. At this time, the electrical energy inside the lithium battery 34 fixed inside the outer shell 1 is transferred to the second contact head 33 through the first contact head 32, so that the smartwatch 4 can be continuously and stably charged during the user's daily wear. When the lithium battery 34 is depleted, the charging port 35 installed on the front right side of the outer shell 1 can be connected to an external power source to transfer electrical energy into the lithium battery 34 for storage.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A power bank for a smartwatch, comprising a casing (1) and a smartwatch (4), characterized in that, A fixing mechanism (2) is provided on the rear side of the outer shell (1), and a charging mechanism (3) is provided on the bottom of the smartwatch (4). The fixing mechanism (2) includes a positioning ring (21), which is rotatably connected to the top rear end of the outer shell (1). The bottom left and right sides of the positioning ring (21) are fixedly connected with claws (22). The bottom left and right ends of the rear side of the outer shell (1) are fixedly connected with support arms (23). The top rear side of the support arm (23) is provided with an insertion hole (24). The inner rear side of the insertion hole (24) is fixedly connected with a locking block (25). The locking block (25) engages with the claws (22).

2. The power bank for a watch according to claim 1, characterized in that, The fixing mechanism (2) also includes a button (27), which is located at the top right side of the outer casing (1). A plug-in post (26) is fixedly connected to the left side of the button (27). A positioning hole (28) is provided on the right side of the positioning ring (21). The outer side of the plug-in post (26) penetrates the outer casing (1) and is plugged into the positioning hole (28). An anti-loosening component (29) is provided on the outer side of the plug-in post (26).

3. A power bank for a watch according to claim 1, characterized in that, The charging mechanism (3) includes a base (31), which is fixedly connected to the top of the support arm (23). A first contact head (32) is fixedly connected to the top of the base (31), and a second contact head (33) is fixedly connected to the bottom of the smart watch (4). The second contact head (33) is in contact with the first contact head (32).

4. A power bank for a watch according to claim 2, characterized in that, The anti-loosening component (29) includes a hole (291) which is located inside the right side wall of the outer shell (1). A retaining ring (292) is fixedly connected to the outer side of the plug (26). A spring (293) is sleeved on the outer wall of the plug (26). The left and right ends of the spring (293) abut against the retaining ring (292) and the inner wall of the hole (291), respectively.

5. A power bank for a watch according to claim 3, characterized in that, The charging mechanism (3) also includes a lithium battery (34), which is fixedly connected to the inside of the housing (1) and electrically connected to the contact head (32).

6. A power bank for a watch according to claim 5, characterized in that, The charging mechanism (3) also includes a charging port (35), which is installed on the front right wall of the housing (1) and is electrically connected to the lithium battery (34).

7. A power bank for a watch according to claim 1, characterized in that, The outer shell (1) has a hanging opening (5) at the front right side.

8. A power bank for a watch according to claim 1, characterized in that, The claw (22) is a plastic part. The bottom rear side of the claw (22) has an outward protruding hook-shaped structure. The upper and lower ends of the block (25) are provided with inclined surfaces. The bottom of the claw (22) slides and abuts against the inclined surface of the block (25).

9. A power bank for a watch according to claim 3, characterized in that, The base (31) has an upwardly protruding elongated structure, and there are two contact heads (32), which are respectively located at the front and rear ends of the top of the base (31).

10. A method of using a power bank for a watch, characterized in that, A power bank for a watch according to any one of claims 1-9 includes the following steps: S1. By pulling the button (27), the button (27) moves the plug (26) toward the hole (291), and the retaining ring (292) compresses the spring (293), causing the plug (26) to exit the positioning hole (28) on the side of the positioning ring (21), releasing the rotation restriction on the positioning ring (21). Then, the positioning ring (21) is pushed upward, and the claw (22) is squeezed by the inclined surface of the lower end of the locking block (25) and undergoes outward elastic deformation to retract and disengage from the plug hole (24), thereby flipping the positioning ring (21) upward along the top of the outer shell (1) to open it. S2. Place the smartwatch (4) on the front side of the outer shell (1), rotate it downwards and press the positioning ring (21). The claw (22) at the bottom of the positioning ring (21) moves downwards into the insertion hole (24). The bottom end of the claw (22) contacts the inclined surface at the top of the block (25) and undergoes elastic deformation and retraction. After passing the block (25), it rebounds and engages with the block (25). At the same time, the positioning ring (21) closes and drives the positioning hole (28) to rotate to the position aligned with the plug (26). The spring (293) then pushes the retaining ring (292), driving the plug (26) to insert into the positioning hole (28) and complete the locking of the positioning ring (21). S3. While the positioning ring (21) is pressed down, the smart watch (4) is simultaneously squeezed downward by the positioning ring (21), causing the second contact head (33) at the bottom of the smart watch (4) to abut against the surface of the first contact head (32) on the top base (31) of the support arm (23). The electrical energy generated by the lithium battery (34) inside the shell (1) is transmitted to the inside of the smart watch (4) for charging through the first contact head (32) and the second contact head (33). S4. When the lithium battery (34) inside the casing (1) is depleted, the lithium battery (34) is replenished by connecting an external power source to the charging port (35) on the surface of the casing (1).