Large wind turbine tower self-assembly construction device

Abstract

The application relates to the technical field of wind driven generators, in particular to a large wind driven generator tower drum self-assembly construction device, which comprises a gun body, a gun bolt, a connecting head fixedly connected to the upper surface of the gun bolt and a gun head snap-connected to the outer surface of the connecting head. When the size of the inside of the gun bolt needs to be adjusted, the bolt can be conveniently and better fixed, the hand-held fixing plate is slid to the direction of the gun bolt, the adjusting plate is slid to the inside of the sliding groove, the connecting ring is pulled downward, the hydraulic rod is retracted and extended, the connecting rod is inserted into the fixed groove, the position of the adjusting plate inside the gun bolt is fixed, the size of the inside of the gun bolt can be changed, the bolt can be conveniently fixed, the connecting rod is inserted into different groups of fixed grooves, the size of the inside of the gun bolt can be arbitrarily adjusted, and the size of the inside of the gun bolt can be adjusted according to the size of the bolt.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power generator, in particular to a large wind power generator tower drum self-assembly construction device. BACKGROUND

[0002] Wind power generation refers to converting the kinetic energy of wind into electric energy. Wind is a kind of energy without public hazards, and it is very environmentally friendly to use wind power generation, and the electric energy generated is very huge, so more and more countries pay more attention to wind power generation.

[0003] When the wind power generator tower drum is assembled and constructed, a large electric wrench is needed to quickly fix the tower drum bolts, but since the electric wrench cannot adjust the size of the gun head according to the size of the bolt when fixing the bolt, new gun heads need to be replaced when installing bolts of different sizes, which affects the efficiency of installing the wind power generator tower drum. SUMMARY

[0004] The purpose of the present application is to provide a large wind power generator tower drum self-assembly construction device to solve the problem that the electric wrench cannot adjust the size of the gun head according to the size of the bolt when fixing the bolt, so that new gun heads need to be replaced when installing bolts of different sizes, which affects the efficiency of installing the wind power generator tower drum.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a large wind power generator tower drum self-assembly construction device, comprising:

[0006] The gun body comprises a gun bolt, the upper surface of the gun bolt is fixedly connected with a connecting head, the outer surface of the connecting head is clamped with a gun head, the upper surface of the gun head is rotatably connected with a flange, the upper surface of the flange is fixedly connected with a gun body, and the upper surface of the gun body is fixedly connected with a gun handle.

[0007] The adjusting mechanism comprises a connecting groove, the connecting groove is arranged on the outer surface of the gun bolt, the inner side of the connecting groove is slidably connected with a sliding block, the upper surface of the sliding block is fixedly connected with a hydraulic rod, the outer surface of the sliding block is fixedly connected with a connecting ring, the lower surface of the connecting ring is fixedly connected with a connecting rod, the inner side of the gun bolt is provided with a sliding groove, the inner side of the sliding groove is slidably connected with an adjusting plate, the outer surface of the adjusting plate is fixedly connected with a fixed plate, the upper surface of the fixed plate is provided with a fixed groove, and the connecting rod is insertedly connected in the inner side of the fixed groove.

[0008] Preferably, the connecting groove is a "convex" groove, the connecting groove is three groups, the slider is a "convex" block, the connecting ring is connected to the inner side of the connecting groove by sliding the slider and is connected to the outer surface of the bolt, the connecting rod is a rod shape, which is used to slide the connecting ring on the outer surface of the bolt, and then the connecting rod can be inserted into the fixed groove, and then the position of the fixed groove can be fixed.

[0009] Preferably, the sliding groove is an annular groove, the adjusting plate is an arc-shaped plate, the adjusting plate is three groups, the fixed plate is a plate shape, the fixed groove is a circular groove shape, the fixed groove is a plurality of groups, and the fixed plate is connected to the inner side of the bolt by sliding. The function is that when the size of the bolt needs to be adjusted according to the size of the bolt, the adjusting plate slides to the inner side of the bolt, and then the three adjusting plates can adjust the size of the bolt.

[0010] Preferably, the connecting rod is inserted into the inner side of the fixed groove, and the connecting rod is inserted into different groups of fixed grooves to fix the adjusting plate to the inner side of the sliding groove. The function is that by sliding the fixed plate to the inner side of the bolt, the adjusting plate slides to the inner side of the sliding groove, and then the adjusting plate can be fixed in the position of the bolt by inserting the connecting rod into different groups of fixed grooves, and then the purpose of adjusting the size of the bolt is achieved.

[0011] Preferably, the quick release mechanism is connected to the outer surface of the gun head, which comprises a fixed ring, the fixed ring is fixedly connected to the outer surface of the gun head, the outer surface of the fixed ring is provided with a limiting groove, the inner side of the limiting groove is slidably connected with a clamping plate, the outer surface of the clamping plate is fixedly connected with a handle, the upper surface of the clamping plate is provided with a insertion slot, the outer surface of the gun head is slidably connected with a moving ring, the lower surface of the moving ring is fixedly connected with an insertion rod, the insertion rod is inserted into the inner side of the insertion slot, the outer surface of the connecting head is provided with a clamping slot, and the clamping plate is slidably connected in the clamping slot.

[0012] Preferably, the fixed ring is annular, the limiting groove is an arc-shaped groove, the limiting groove is three groups, the clamping plate is an arc-shaped plate, the clamping plate is slidably connected to the inner side of the limiting groove, and the handle is a cylindrical shape. The function is that the clamping plate slides in the inner side of the limiting groove, and then the clamping plate is inserted into the clamping slot, and then the connecting head can be fixedly connected to the inner side of the gun head.

[0013] Preferably, the slot is in the shape of a circular groove, and multiple slots are formed on the upper surface of the card plate. The moving ring is in the shape of an annulus and is slidably connected above the fixed ring. The insertion rod is in the shape of a round rod, and multiple insertion rods are formed. The insertion rod is adapted to the slot. Its function is to slide the moving ring on the outer surface of the gun head, thereby causing the insertion rod to insert into the slot, thereby fixing the position of the card plate. Then, the connector can be fixedly connected to the inner side of the gun head, and the bolt can be fixedly connected to the device, which facilitates the fixing of the bolt.

[0014] Preferably, the slot is an arc-shaped groove, and the slot is formed in three groups on the outer surface of the connector. The slot is adapted to the slot and its function is to slide the slot to the inner side of the slot, thereby ensuring that the connector is stably and fixedly connected to the inner side of the gun head.

[0015] Preferably, the fixing mechanism provided on the outer surface of the gun body includes a fixing ring, which is fixedly connected to the outer surface of the gun handle. A wristband is fixedly connected to the outer surface of the connecting frame, a spring is fixedly connected to the inner side of the wristband, and an adjusting ring is fixedly connected to the outer surface of the spring.

[0016] Preferably, the wristband is ring-shaped, the spring is spiral-shaped, and multiple sets of springs are fixedly connected to the inner side of the wristband. The adjusting ring is arc-shaped, and the spring is fixedly connected between the adjusting ring and the wristband. Its function is to fix the spring and the adjusting ring to the inner side of the wristband, so as to adjust it according to the size of the operator's wrist and prevent the device from vibrating when the thread is fixed, causing the device to detach from the hand and causing damage to the device.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. When it is necessary to adjust the size of the inner side of the bolt, to facilitate better fixing of the bolt, slide the fixing plate towards the bolt by holding it, so that the adjusting plate slides inside the groove. Then, by pulling down the connecting ring, the hydraulic rod extends and retracts, so that the connecting rod inserts into the fixing groove, thereby fixing the position of the adjusting plate inside the bolt. This allows the size of the bolt's interior to be changed, making it easier to fix the bolt. By inserting the connecting rod into different sets of fixing grooves, the size of the bolt's interior can be adjusted arbitrarily, so that it can be adjusted according to the size of the bolt's interior.

[0019] 2. By sliding the moving ring on the outer surface of the gun head, and then sliding the moving ring upward, the insertion rod can be separated from the slot. Then, by holding the handle, the card plate can be slid out from the inside of the slot, and the connector and gun head can be quickly disassembled, making it convenient to store the device after installation.

[0020] 3. When using the device, by passing the wrist through the wristband, the device can be held more stably in the hand, preventing the device from vibrating and falling out of the hand when the threads are fixed, thus preventing damage to the device. At the same time, since the spring and adjustment ring are fixedly connected inside the wristband, it can be adjusted according to the size of the operator's wrist, making it easier to hold the device. Attached Figure Description

[0021] Figure 1 This is a frontal perspective view of the structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 A three-dimensional sectional view of the bolt structure;

[0023] Figure 3 For the present invention Figure 2 A three-dimensional sectional view of the connection structure between the bolt and the connecting ring;

[0024] Figure 4 For the present invention Figure 3 A three-dimensional sectional view of the connection structure between the connector and the gun head;

[0025] Figure 5 For the present invention Figure 4 A three-dimensional schematic diagram of the connection structure between the fixed ring and the movable ring;

[0026] Figure 6 For the present invention Figure 4 A three-dimensional schematic diagram of the connection structure between the card slot and the card plate;

[0027] Figure 7 For the present invention Figure 1 A three-dimensional structural diagram of the wristband.

[0028] In the diagram: 1. Bolt; 11. Connector; 12. Gun head; 13. Flange; 14. Gun body; 15. Gun handle; 2. Connecting groove; 21. Slider; 22. Hydraulic rod; 23. Connecting ring; 24. Connecting rod; 25. Slide groove; 26. Adjusting plate; 27. Fixing plate; 28. Fixing groove; 3. Fixing ring; 31. Limiting groove; 32. Clamping plate; 33. Handle; 34. Slot; 35. Moving ring; 36. Insert rod; 37. Clamping groove; 4. Connecting frame; 41. Hand ring; 42. Spring; 43. Adjusting ring. Detailed Implementation

[0029] 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 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.

[0030] Please see Figures 1-7 One embodiment provided by the present invention:

[0031] A self-assembly construction device for a large wind turbine tower includes:

[0032] The gun body includes a bolt 1, a connector 11 is fixedly connected to the upper surface of the bolt 1, a gun head 12 is engaged with the outer surface of the connector 11, a flange 13 is rotatably connected to the upper surface of the gun head 12, a gun body 14 is fixedly connected to the upper surface of the flange 13, and a gun handle 15 is fixedly connected to the upper surface of the gun body 14.

[0033] The adjustment mechanism includes a connecting groove 2, which is formed on the outer surface of the bolt 1. A slider 21 is slidably connected to the inner side of the connecting groove 2. A hydraulic rod 22 is fixedly connected to the upper surface of the slider 21. A connecting ring 23 is fixedly connected to the outer surface of the slider 21. A connecting rod 24 is fixedly connected to the lower surface of the connecting ring 23. A sliding groove 25 is formed on the inner side of the bolt 1. An adjusting plate 26 is slidably connected to the inner side of the sliding groove 25. A fixing plate 27 is fixedly connected to the outer surface of the adjusting plate 26. A fixing groove 28 is formed on the upper surface of the fixing plate 27. The connecting rod 24 is inserted into the inner side of the fixing groove 28.

[0034] Furthermore, the connecting groove 2 is a "convex" shaped groove, and there are three sets of connecting grooves 2. The slider 21 is a "convex" block shape. The connecting ring 23 is slidably connected to the inner side of the connecting groove 2 through the slider 21 and then slidably connected to the outer surface of the bolt 1. The connecting rod 24 is rod-shaped, and its function is to slide on the outer surface of the bolt 1 through the connecting ring 23, so that the connecting rod 24 can be inserted into the fixing groove 28, thereby fixing the position of the fixing groove 28.

[0035] Furthermore, the slide groove 25 is an annular groove, the adjusting plate 26 is an arc-shaped plate, and there are three sets of adjusting plates 26. The fixing plate 27 is plate-shaped, and the fixing groove 28 is circular groove-shaped. Multiple sets of fixing grooves 28 are opened on the upper surface of the fixing plate 27. The fixing plate 27 is slidably connected to the inner side of the bolt 1. Its function is to slide the adjusting plate 26 on the inner side of the slide groove 25. When it is necessary to adjust the internal size of the bolt 1 according to the size of the bolt, the adjusting plate 26 slides to the inner side of the bolt 1, so that the three sets of adjusting plates 26 can adjust the internal size of the bolt 1.

[0036] Furthermore, the connecting rod 24 is inserted into the inner side of the fixing groove 28. By inserting the connecting rod 24 into different sets of fixing grooves 28, the adjusting plate 26 is fixedly connected to the inner side of the slide groove 25. Its function is to slide the fixing plate 27 towards the inner side of the bolt 1, thereby allowing the adjusting plate 26 to slide within the slide groove 25. By inserting the connecting rod 24 into different sets of fixing grooves 28, the position of the adjusting plate 26 within the bolt 1 can be fixed, thereby achieving the purpose of adjusting the size of the inner side of the bolt 1.

[0037] Furthermore, a quick-release mechanism is provided on the outer surface of the gun head 12, including a fixing ring 3. The fixing ring 3 is fixedly connected to the outer surface of the gun head 12. A limiting groove 31 is formed on the outer surface of the fixing ring 3. A locking plate 32 is slidably connected to the inner side of the limiting groove 31. A handle 33 is fixedly connected to the outer surface of the locking plate 32. A slot 34 is formed on the upper surface of the locking plate 32. A moving ring 35 is slidably connected to the outer surface of the gun head 12. A plug rod 36 is fixedly connected to the lower surface of the moving ring 35. The plug rod 36 is inserted into the inner side of the slot 34. A slot 37 is formed on the outer surface of the connector 11. The locking plate 32 is slidably connected to the inner side of the slot 37.

[0038] Furthermore, the fixing ring 3 is annular, the limiting groove 31 is an arc-shaped groove, the limiting groove 31 is in three sets, the clamping plate 32 is an arc-shaped plate, the clamping plate 32 is slidably connected to the inner side of the limiting groove 31, and the handle 33 is cylindrical. Its function is to slide the clamping plate 32 on the inner side of the limiting groove 31, thereby allowing the clamping plate 32 to be inserted into the clamping groove 37, and thus the connector 11 can be fixedly connected to the inner side of the gun head 12.

[0039] Furthermore, the slot 34 is in the shape of a circular groove, and multiple sets of slots 34 are formed on the upper surface of the card plate 32. The moving ring 35 is in the shape of a ring and is slidably connected above the fixed ring 3. The insertion rod 36 is in the shape of a round rod, and multiple sets of insertion rods 36 are adapted to the slot 34. Its function is to slide the moving ring 35 on the outer surface of the gun head 12, thereby causing the insertion rod 36 to be inserted into the slot 34, thereby fixing the position of the card plate 32. This allows the connector 11 to be fixedly connected to the inner side of the gun head 12, and then the bolt 1 to be fixedly connected to the device, facilitating the fixing of the bolt.

[0040] Furthermore, the slot 37 is an arc-shaped groove, and the slot 37 is provided in three sets on the outer surface of the connector 11. The slot 34 is adapted to the slot 37, and its function is to slide the slot 34 to the inner side of the slot 37, thereby ensuring that the connector 11 is stably and fixedly connected to the inner side of the gun head 12.

[0041] Furthermore, a fixing mechanism is provided on the outer surface of the gun body 14, including a fixing ring 3, which is fixedly connected to the outer surface of the gun handle 15. A wristband 41 is fixedly connected to the outer surface of the connecting bracket 4, a spring 42 is fixedly connected to the inner side of the wristband 41, and an adjusting ring 43 is fixedly connected to the outer surface of the spring 42.

[0042] Furthermore, the wristband 41 is ring-shaped, the spring 42 is spiral-shaped, and multiple sets of spring 42 are fixedly connected to the inner side of the wristband 41. The adjusting ring 43 is arc-shaped plate-shaped, and the spring 42 is fixedly connected between the adjusting ring 43 and the wristband 41. Its function is to fix the spring 42 and the adjusting ring 43 to the inner side of the wristband 41, so that it can be adjusted according to the size of the operator's wrist. This prevents the device from vibrating when the thread is fixed, causing the device to detach from the hand and causing damage to the device.

[0043] Working principle: A connecting groove 2 is formed on the outer surface of the bolt 1. A slider 21 is slidably connected to the inner side of the connecting groove 2. A hydraulic rod 22 is fixedly connected to the upper surface of the slider 21. A connecting ring 23 is fixedly connected to the outer surface of the slider 21. A connecting rod 24 is fixedly connected to the lower surface of the connecting ring 23. A sliding groove 25 is formed on the inner side of the bolt 1. An adjusting plate 26 is slidably connected to the inner side of the sliding groove 25. A fixing plate 27 is fixedly connected to the outer surface of the adjusting plate 26. A fixing groove 28 is formed on the upper surface of the fixing plate 27. The connecting rod 24 is inserted into the inner side of the fixing groove 28. The adjusting plate 26 slides on the inner side of the sliding groove 25. When the bolt needs to be adjusted... When adjusting the size of the inner side of the bolt 1, it is easier to fix the bolt. By holding the fixing plate 27 and sliding it towards the bolt 1, the adjusting plate 26 slides inside the slide groove 25. Then, by pulling down the connecting ring 23, the hydraulic rod 22 extends and retracts, which causes the connecting rod 24 to insert into the connecting fixing groove 28, thereby fixing the position of the adjusting plate 26 inside the bolt 1. This allows the size of the inside of the bolt 1 to be changed, making it easier to fix the bolt. By inserting the connecting rod 24 into different sets of fixing grooves 28, the size of the inside of the bolt 1 can be adjusted arbitrarily, so that it can be adjusted according to the size of the bolt.

[0044] A fixing ring 3 is fixedly connected to the outer surface of the gun head 12. A limiting groove 31 is formed on the outer surface of the fixing ring 3. A locking plate 32 is slidably connected to the inner side of the limiting groove 31. A handle 33 is fixedly connected to the outer surface of the locking plate 32. A slot 34 is formed on the upper surface of the locking plate 32. A moving ring 35 is slidably connected to the outer surface of the gun head 12. A plug rod 36 is fixedly connected to the lower surface of the moving ring 35. The plug rod 36 is inserted into the inner side of the slot 34. A slot 37 is formed on the outer surface of the connector 11. The locking plate 32 is slidably connected to the inner side of the slot 37. By sliding the moving ring 35 on the outer surface of the gun head 12, the plug rod 36 can be separated from the slot 34 by sliding the moving ring 35 upward. Then, by holding the handle 33, the locking plate 32 can be slid out from the inner side of the slot 37. This allows for quick disassembly of the connector 11 and the gun head 12, making it convenient to store the device after installation.

[0045] A connecting bracket 4 is fixedly connected to the outer surface of the gun handle 15. A wrist ring 41 is fixedly connected to the outer surface of the connecting bracket 4. A spring 42 is fixedly connected to the inner side of the wrist ring 41. An adjusting ring 43 is fixedly connected to the outer surface of the spring 42. When using the device, the wrist passes through the wrist ring 41, which allows the device to be held more stably in the hand. This prevents the device from vibrating and falling out of the hand when the threads are fixed, thus preventing damage to the device. At the same time, since the spring 42 and the adjusting ring 43 are fixedly connected to the inner side of the wrist ring 41, it can be adjusted according to the size of the operator's wrist, making it easier to hold the device.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A self-assembly construction device for a large wind turbine tower, characterized in that, include: The gun body includes a bolt (1), a connector (11) is fixedly connected to the upper surface of the bolt (1), a gun head (12) is engaged with the outer surface of the connector (11), a flange (13) is rotatably connected to the upper surface of the gun head (12), a gun body (14) is fixedly connected to the upper surface of the flange (13), and a gun handle (15) is fixedly connected to the upper surface of the gun body (14). The adjustment mechanism includes a connecting groove (2), which is opened on the outer surface of the bolt (1). A slider (21) is slidably connected to the inner side of the connecting groove (2). A hydraulic rod (22) is fixedly connected to the upper surface of the slider (21). A connecting ring (23) is fixedly connected to the outer surface of the slider (21). A connecting rod (24) is fixedly connected to the lower surface of the connecting ring (23). A sliding groove (25) is opened on the inner side of the bolt (1). An adjusting plate (26) is slidably connected to the inner side of the sliding groove (25). A fixing plate (27) is fixedly connected to the outer surface of the adjusting plate (26). A fixing groove (28) is opened on the upper surface of the fixing plate (27). The connecting rod (24) is inserted into the inner side of the fixing groove (28).

2. The self-assembly construction device for a large wind turbine tower according to claim 1, characterized in that: The connecting groove (2) is a "convex" groove, the connecting groove (2) is in three groups, the slider (21) is a "convex" block, the connecting ring (23) is slidably connected to the inner side of the connecting groove (2) through the slider (21) and then slidably connected to the outer surface of the bolt (1), and the connecting rod (24) is rod-shaped.

3. The self-assembly construction device for a large wind turbine tower according to claim 1, characterized in that: The slide groove (25) is an annular groove, the adjusting plate (26) is an arc-shaped plate, the adjusting plate (26) is in three groups, the fixing plate (27) is plate-shaped, the fixing groove (28) is circular groove-shaped, the fixing groove (28) is in multiple groups opened on the upper surface of the fixing plate (27), and the fixing plate (27) is slidably connected to the inner side of the bolt (1).

4. The self-assembly construction device for a large wind turbine tower according to claim 1, characterized in that: The connecting rod (24) is inserted into the inner side of the fixing groove (28), and the connecting rod (24) fixes the adjusting plate (26) to the inner side of the slide groove (25) by inserting into different sets of fixing grooves (28).

5. The self-assembly construction device for a large wind turbine tower according to claim 1, characterized in that: The gun head (12) is provided with a quick-release mechanism, including a fixing ring (3). The fixing ring (3) is fixedly connected to the outer surface of the gun head (12). A limiting groove (31) is opened on the outer surface of the fixing ring (3). A card plate (32) is slidably connected to the inner side of the limiting groove (31). A handle (33) is fixedly connected to the outer surface of the card plate (32). A slot (34) is opened on the upper surface of the card plate (32). A moving ring (35) is slidably connected to the outer surface of the gun head (12). A plug rod (36) is fixedly connected to the lower surface of the moving ring (35). The plug rod (36) is inserted into the inner side of the slot (34). A slot (37) is opened on the outer surface of the connector (11). The card plate (32) is slidably connected to the inner side of the slot (37).

6. The self-assembly construction device for a large wind turbine tower according to claim 5, characterized in that: The fixing ring (3) is annular, the limiting groove (31) is an arc-shaped groove, the limiting groove (31) is in three sets, the clamping plate (32) is an arc-shaped plate, the clamping plate (32) is slidably connected to the inner side of the limiting groove (31), and the handle (33) is cylindrical.

7. A self-assembly construction device for a large wind turbine tower according to claim 5, characterized in that: The slot (34) is in the shape of a circular groove. Multiple slots (34) are formed on the upper surface of the card plate (32). The moving ring (35) is in the shape of a ring. The moving ring (35) is slidably connected above the fixed ring (3). The insertion rod (36) is in the shape of a round rod. Multiple insertion rods (36) are formed. The insertion rod (36) is adapted to the slot (34).

8. A self-assembly construction device for a large wind turbine tower according to claim 5, characterized in that: The slot (37) is an arc-shaped groove. The slot (37) is formed in three groups on the outer surface of the connector (11). The slot (34) is adapted to the slot (37).

9. A self-assembly construction device for a large wind turbine tower according to claim 1, characterized in that: The gun body (14) is provided with a fixing mechanism, including a connecting frame (4). The connecting frame (4) is fixedly connected to the outer surface of the gun handle (15). A wristband (41) is fixedly connected to the outer surface of the connecting frame (4). A spring (42) is fixedly connected to the inner side of the wristband (41). An adjusting ring (43) is fixedly connected to the outer surface of the spring (42).

10. A self-assembly construction device for a large wind turbine tower according to claim 9, characterized in that: The wristband (41) is ring-shaped, the spring (42) is spiral-shaped, and multiple springs (42) are fixedly connected to the inner side of the wristband (41). The adjusting ring (43) is arc-shaped, and the spring (42) is fixedly connected between the adjusting ring (43) and the wristband (41).

Images