CN219699466U

CN219699466U - Angle adjusting device

Info

Publication number: CN219699466U
Application number: CN202223419433.XU
Authority: CN
Inventors: 周东德
Original assignee: Ningbo Ruicheng Smart Home Co ltd
Current assignee: Ningbo Ruicheng Smart Home Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-09-19
Anticipated expiration: 2032-12-20

Abstract

The utility model provides an angle adjusting device, which comprises a rotating group and at least one angle adjusting part arranged on the rotating group, wherein the rotating group comprises a rotating shaft, an inner rotating part and at least one outer rotating part, the outer rotating part and the inner rotating part are arranged on the rotating shaft and rotate around the rotating shaft, the angle adjusting part comprises a locking block, an inner adjusting space arranged on the inner rotating part and an outer adjusting space arranged on the outer rotating part, the locking block is positioned in the outer adjusting space and the inner adjusting space, the locking block is in a locking state and an unlocking state in the inner adjusting space, the outer adjusting space comprises a locking adjusting space and an unlocking adjusting space, and an unlocking part is arranged at the joint of the unlocking adjusting space and the locking adjusting space.

Description

Angle adjusting device

Technical Field

The utility model relates to the field of angle adjustment, in particular to an angle adjusting device.

Background

In seats such as sofas, an angle adjusting device is generally adopted to realize the existing relatively stable angle adjusting device of the angle adjusting device of a backrest and the like, for example, an angle adjusting device disclosed in an utility model patent with publication number of CN205578494U comprises a first supporting structure, a second supporting structure and a gear member arranged between the first supporting structure and the second supporting structure, wherein the gear member can rotate in the first supporting structure and the second supporting structure, a wedge-shaped space is formed on one side of the first supporting structure and one side of the second supporting structure, a gear block is arranged in the wedge-shaped space, a gear on the gear block is matched with the gear member, a first fixed shaft penetrating through the gear block is arranged on the gear block, two ends of the first fixed shaft respectively extend into a first strip-shaped blind hole and a second strip-shaped blind hole, and an elastic member pushing the gear block to a direction close to the gear member is also arranged in the wedge-shaped space. The existing angle adjusting device has the common gear-disengaging angle between 12 degrees and 18 degrees, has smaller stroke and has a space for further improvement.

Disclosure of Invention

In view of the above prior art, an object of the present utility model is to provide a novel angle adjusting device, which is capable of having a large-angle, large-stroke shift-out process and developing toward a higher load capacity.

The utility model adopts the following technical scheme:

the utility model provides an angle adjusting device, which comprises a rotating group and at least one angle adjusting part arranged on the rotating group, wherein the rotating group comprises a rotating shaft, an inner rotating part and at least one outer rotating part, the outer rotating part and the inner rotating part are arranged on the rotating shaft and rotate around the rotating shaft, the angle adjusting part comprises a locking block, an inner adjusting space arranged on the inner rotating part and an outer adjusting space arranged on the outer rotating part, the locking block is positioned in the outer adjusting space and the inner adjusting space, the locking block is provided with a locking state and an unlocking state in the inner adjusting space, the outer adjusting space comprises a locking adjusting space and an unlocking adjusting space, and when the locking block is in the locking state, the locking block is positioned in the locking adjusting space, and when the outer rotating part and the inner rotating part relatively rotate, the locking block moves towards the direction of the unlocking adjusting space and is reversely locked; when the locking block enters the unlocking adjustment space through the unlocking part, the locking block enters the unlocking state, the locking block can move back and forth in the outer adjustment space, and when the locking block collides with the tail end of the unlocking adjustment space, the locking block enters the locking state.

In a preferred embodiment, the angle adjusting device includes two outer rotating members, and the inner rotating member is sandwiched between the two outer rotating members.

In a preferred embodiment, the angle adjusting units are a pair, and the two angle adjusting units are symmetrically arranged with the rotation axis as a center.

In a preferred embodiment, the angle adjusting device has teeth at one end of the locking block, the locking adjusting space has teeth, and when the locking block is in the locked state, the teeth of the locking block are engaged with the teeth of the locking adjusting space.

Further, in the angle adjusting device, an elastic member and a wedge portion are disposed in the inner adjusting space, and the locking block is located in the wedge portion, and when the elastic member drives the tooth end of the locking block to be connected with the tooth portion of the locking adjusting space, the locking block is in a locking state.

Further, the wedge-shaped portion has a locking end, when the tail end of the locking block is located at the locking end, the tooth end of the locking block is in a movable state, the elastic member is matched with the tooth end of the locking block to drive the tooth end of the locking block to be connected with the tooth portion of the locking adjustment space, and the locking block is in a locking state.

Further, in the angle adjusting device, when the locking block is in the locking state, the locking block is obliquely arranged relative to the tooth part of the locking adjusting space towards the rotating direction of the side where the unlocking adjusting space is located, when the outer rotating piece and the inner rotating piece rotate relatively and the locking block moves towards the side where the unlocking adjusting space is located, the tooth end of the locking block is in the movable state, and the elastic component is matched with the tooth end of the locking block to drive the tooth end of the locking block to be connected with the tooth part of the locking adjusting space; when the outer rotating member and the inner rotating member reversely rotate, the tooth part of the locking adjusting space is clamped at the tooth end of the locking block, the tooth end of the locking block cannot move, the tail end of the locking block has a trend of further moving towards the direction of the locking end, the locking end of the wedge part is limited, and the outer rotating member and the inner rotating member cannot reversely rotate.

Further, in the angle adjusting device, the wedge portion has an unlocking end, when the tooth end of the locking block is located at the unlocking end, the tail end of the locking block is located on the inner wall of the wedge portion under the action of the elastic member, and the locking block is in an unlocking state.

Further, the unlocking part is a transitional slope, when the locking block is in a locking state, and when the locking block passes through the unlocking part, the unlocking part pushes the tooth end of the locking block to move towards the unlocking end of the wedge-shaped part, and when the tooth end of the locking block is connected with the unlocking end of the wedge-shaped part, the locking block enters the unlocking adjustment space, and the locking block enters the unlocking state.

Further, in the angle adjusting device, the outer adjusting space is a fan-shaped space. The locking block is provided with a wedge-shaped groove, the wedge-shaped groove is matched with the action end of the elastic component, and the tail end of the locking block is also provided with a tail groove connected with the inner wall of the inner adjusting space.

In a preferred embodiment, the angle adjusting device further includes a first rotating handle and a second rotating handle, the first rotating handle is fixedly connected with the inner rotating member, and the second rotating handle is fixedly connected with the outer rotating member.

Compared with the prior art, the angle adjusting device comprises a rotating group and at least one angle adjusting part arranged on the rotating group, wherein the rotating group comprises a rotating shaft, an inner rotating piece and at least one outer rotating piece, the outer rotating piece and the inner rotating piece are arranged on the rotating shaft and rotate around the rotating shaft, the angle adjusting part comprises a locking block, an inner adjusting space arranged on the inner rotating piece and an outer adjusting space arranged on the outer rotating piece, the locking block is positioned in the outer adjusting space and the inner adjusting space, the locking block is provided with a locking state and an unlocking state in the inner adjusting space, the outer adjusting space comprises a locking adjusting space and an unlocking adjusting space, the unlocking adjusting space is provided with an unlocking part at the joint of the unlocking adjusting space and the locking adjusting space, and when the locking block is in the locking state, the locking block is positioned in the locking adjusting space, and when the outer rotating piece and the inner rotating piece relatively rotate, the locking block moves towards the locking adjusting space in the opposite direction; when the locking block enters the unlocking adjustment space through the unlocking part, the locking block enters the unlocking state, the locking block can move back and forth in the outer adjustment space, and when the locking block collides with the tail end of the unlocking adjustment space, the locking block enters the locking state. According to the utility model, a structure of matching the gear component and the gear block is changed, a novel mode of linkage between the inner and outer adjusting spaces and the locking block is adopted, the structure is novel, and the stress mode in the prior art when the angle is fixed is changed. Mainly, the utility model can have a large-angle and large-stroke gear-shifting-out process and a large-angle and large-stroke gear-shifting front track, can provide a larger-angle movable space for seats such as sofas and the like, and is beneficial to providing new functions for the seats such as sofas and the like.

Drawings

Fig. 1 is a schematic structural view of an angle adjusting device provided by the utility model.

Fig. 2 is an exploded view of the angle adjusting device according to the present utility model.

Fig. 3 is a schematic diagram showing an exploded structure of the angle adjusting device according to the present utility model.

Fig. 4 is a schematic structural view of an inner adjusting space portion of the angle adjusting device provided by the utility model.

Fig. 5 is a schematic structural view of a locking block of the angle adjusting device provided by the utility model.

Fig. 6 is a schematic view of the angle adjusting device provided by the utility model in a locking state.

Fig. 7 is a top view of the angle adjusting device provided by the utility model in a locked state.

Fig. 8 is a schematic diagram of a gear disengagement of the angle adjusting device provided by the utility model when the angle adjusting device is in a locked state and enters an unlocked state.

Fig. 9 is a neutral position schematic diagram of the angle adjusting device in an unlocked state.

(some of the structures in the above partial views are colored to distinguish between different structures that are spatially stacked for better understanding of the present solution.)

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It is noted that when an element is referred to as being "mounted," "secured," or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should be noted that, in the embodiments of the present utility model, terms such as left, right, up, and down are merely relative concepts or references to normal use states of the product, and should not be construed as limiting.

As shown in fig. 1 to 4, the present utility model provides an angle adjusting device, which comprises a rotating group 100 and at least one angle adjusting portion 200 provided on the rotating group 100, wherein the rotating group 100 comprises a rotating shaft 201, an inner rotating member 203 and at least one outer rotating member 202, the outer rotating member 202 and the inner rotating member 203 are mounted on the rotating shaft 201 and rotate around the rotating shaft 201, the main parts of the outer rotating member 202 and the inner rotating member 203 are in a circular plate shape, the rotating shaft 201 is assembled at the center, the angle adjusting portion 200 comprises a locking block 204, an inner adjusting space 205 provided on the inner rotating member 203 and an outer adjusting space 206 provided on the outer rotating member 202, the locking block 204 is located in the outer adjusting space 206 and the inner adjusting space 205, the locking block 204 has a locking state and an unlocking state in the inner adjusting space 205, the outer adjusting space 206 comprises a locking adjusting space 207 and an unlocking adjusting space 208, the unlocking adjusting space 208 is located at the connection position of the unlocking adjusting space 208 and the locking space 207, the rotating block 204 is located in the opposite direction to the locking space 204, and the rotating member 202 is located in the locking state when the locking adjusting space 204 is located in the locking space 204; when the locking block 204 enters the unlocking adjustment space 208 through the unlocking portion 209, the locking block 204 enters the unlocking state, the locking block 204 can move back and forth in the outer adjustment space 206, and when the locking block 204 collides with the end of the unlocking adjustment space 208, the locking block 204 enters the locking state. The present utility model limits the movable state of the lock block 204 by using the inner adjustment space 205, and limits the movement of the lock block 204 with respect to the outer rotating member 202 by the outer adjustment space 206, thereby limiting the angular adjustment range. Further, in the angle adjusting device provided by the utility model, one end of the locking block 204 is provided with teeth, the locking adjusting space 207 is provided with teeth 213, and when the locking block 204 is in the locking state, the teeth end of the locking block 204 is matched with the teeth 213 of the locking adjusting space 207.

Further, in the angle adjusting device provided by the utility model, the elastic member 210 and the wedge-shaped portion 211 are disposed in the inner adjusting space 205, the locking block 204 is located in the wedge-shaped portion 211, and when the elastic member 210 drives the tooth end of the locking block 204 to be connected with the tooth portion 213 of the locking adjusting space 207, the locking block 204 is in a locking state. Further, in the angle adjusting device provided by the utility model, the wedge-shaped portion 211 has a locking end 212, when the tail end of the locking block 204 is located at the locking end 212, the tooth end of the locking block 204 is in an active state, the elastic member 210 cooperates with the tooth end of the locking block 204 to drive the tooth end of the locking block 204 to keep connected with the tooth portion 213 of the locking adjusting space 207, and the locking block 204 is in a locking state. Further, in the angle adjusting device provided by the utility model, the wedge-shaped portion 211 has a locking end 212, when the tail end of the locking block 204 is located at the locking end 212, the tooth end of the locking block 204 is in an active state, the elastic member 210 cooperates with the tooth end of the locking block 204 to drive the tooth end of the locking block 204 to keep connected with the tooth portion 213 of the locking adjusting space 207, and the locking block 204 is in a locking state. Further, in the angle adjusting device provided by the utility model, the wedge-shaped portion 211 has a locking end 212, when the tail end of the locking block 204 is located at the locking end 212, the tooth end of the locking block 204 is in an active state, the elastic member 210 cooperates with the tooth end of the locking block 204 to drive the tooth end of the locking block 204 to keep connected with the tooth portion 213 of the locking adjusting space 207, and the locking block 204 is in a locking state. The state change of the present utility model can be referred to in fig. 6-9. The angle of change of fig. 6 to 7 is 37.5 °, the angle of change of fig. 7 to 8 is 18 °, and the angle of change of fig. 8 to 9 is 85 °.

Further, in the angle adjusting device provided by the utility model, when the locking block 204 is in the locked state, the locking block 204 is obliquely arranged relative to the tooth 213 of the locking adjusting space 207 in the rotating direction of the side where the unlocking adjusting space 208 is located, the outer rotating member 202 rotates relative to the inner rotating member 203, and when the locking block 204 moves in the direction of the side where the unlocking adjusting space 208 is located, the tooth end of the locking block 204 is in the movable state, and the elastic member 210 cooperates with the tooth end of the locking block 204 to drive the tooth end of the locking block 204 to keep connected with the tooth 213 of the locking adjusting space 207; when the outer rotating member 202 and the inner rotating member 203 rotate reversely, the tooth portion 213 of the locking adjusting space 207 blocks the tooth end of the locking block 204, the tooth end of the locking block 204 cannot move, and the tail end of the locking block 204 has a tendency to move further toward the locking end 212, which is limited by the locking end 212 of the wedge portion 211, and the outer rotating member 202 and the inner rotating member 203 cannot rotate reversely. Further, in the angle adjusting device provided by the utility model, the wedge 211 has an unlocking end 214, when the tooth end of the locking block 204 is located at the unlocking end 214 (a small step matched with the tooth end of the locking block 204), the tail end of the locking block 204 is located on the inner wall of the wedge 211 under the action of the elastic member 210, and the locking block 204 is in an unlocking state. Further, in the angle adjusting device provided by the utility model, the unlocking portion 209 is a transitional slope, when the locking block 204 is in a locked state, and the locking block 204 passes through the unlocking portion 209, the unlocking portion 209 pushes the tooth end of the locking block 204 to move towards the unlocking end 214 of the wedge-shaped portion 211, and when the tooth end of the locking block 204 is connected with the unlocking end 214 of the wedge-shaped portion 211, the locking block 204 enters the unlocking adjusting space 208, and the locking block 204 enters the unlocked state.

Further, in the angle adjusting device provided by the utility model, the outer adjusting space 206 is a sector-shaped circular arc space, the tooth 213 of the locking adjusting space 207 is located on the inner wall of the locking adjusting space 207 on the side far away from the rotating shaft 201, the tooth 213 is used for locking at a corresponding angle, and when the locking block 204 is in a locking state, the angle can be adjusted in a single direction, and the angle can be fixed by locking in the opposite direction. The main stress part is not concentrated on the tooth end of the locking block 204 or the tooth part 213 of the locking adjusting space 207 any more, but the tooth end of the locking block 204 is extruded by the outer rotating member 202, and the tail end of the locking block 204 is propped against the inner rotating member 203, so that the locking of the angle is kept fixed, and the stress is dispersed correspondingly, thereby being beneficial to improving the load capacity of products. It should be noted that when the tooth end of the lock block 204 engages with the tooth portion 213 of the lock adjustment space 207 for locking, the tendency of the lock block 204 from the tooth end to the tail end is close to the rotation direction at the engagement point of the outer rotating member 202, and the key force receiving portion of the present utility model does not act solely on the tooth portion but becomes the extrusion of the lock block 204 from one end to the other end, which is advantageous for improving the load capacity of the product compared with the existing mode in terms of structural strength. The outer adjusting space 206 of the utility model is smoothly and gradually changed from wide to narrow through the unlocking part 209, and the toggle locking block 204 is changed from oblique to transverse, so that the unlocking state is smoothly entered.

The utility model designs the outer adjusting space specifically, the outer adjusting space increases the gear engaging angle and increases the gear disengaging stroke, and in the embodiment, the maximum gear disengaging can be at 90 degrees. The first gear engaging angle can be 90 degrees, the utility model can have a large-angle and large-stroke gear disengaging process and a large-angle and large-stroke track before gear engaging, can provide a larger-angle movable space for seats such as sofas and the like, and is beneficial to providing new functions for the seats such as sofas and the like.

In addition, preferably, in order to improve the loading capacity of the product, the angle adjusting device provided by the present utility model is further designed, and the rotating group 100 includes two outer rotating members 202, and the inner rotating member 203 is sandwiched between the two outer rotating members 202. In this embodiment, the angle adjusting device further includes a first rotating handle 110 and a second rotating handle 120, where the first rotating handle 110 is fixedly connected to the inner rotating member 203, and the second rotating handle 120 is fixedly connected to the outer rotating member 202. In this embodiment, the first rotating handle 110 is integrally formed with the inner rotating member 203, and the two outer rotating members 202 are fixed to the second rotating handle 120 by rivets. Still more preferably, in the angle adjusting device according to the present utility model, the angle adjusting portions 200 are a pair, and the two angle adjusting portions 200 are symmetrically arranged around the rotation axis 201. The angle adjusting part 200 of the present utility model may be provided in plural, for example, three, four, and no matter how many, the motions between the plurality of angle adjusting parts 200 are cooperated. In this embodiment, the locking block 204 has a sufficient length, and the middle portion is located in the inner adjusting space 205, and the two ends are located in the outer adjusting spaces 206 of the upper and lower outer rotating members 202, respectively. Therefore, the stress is further dispersed through the addition of the structural members, and the load capacity of the product is further improved. Further, the elastic member 210 of the present utility model still adopts a spring, as shown in fig. 5, the locking block 204 is provided with a wedge groove 215, and the wedge groove 215 is matched with the acting end of the elastic member 210, which is favorable for the stable connection between the elastic member 210 and the locking block 204 in the moving process, and the tail end of the locking block 204 is further provided with a tail groove 216 connected with the inner wall of the inner adjusting space 205. Further, a cover plate is further installed on the outer sides of the two outer rotating members 202, so as to protect the operation inside the device from being disturbed by foreign objects.

In summary, the outer adjusting space is specially designed, the gear engaging angle is increased, and the gear disengaging stroke is increased, in this embodiment, the maximum gear disengaging can be at 90 degrees. The first gear engaging angle can be 90 degrees, the utility model can have a large-angle and large-stroke gear disengaging process and a large-angle and large-stroke track before gear engaging, can provide a larger-angle movable space for seats such as sofas and the like, and is beneficial to providing new functions for the seats such as sofas and the like.

The main stress part of the utility model is not concentrated on the tooth end of the locking block or the tooth part of the locking adjusting space, but the tooth end of the locking block is extruded by the outer rotating piece, and the tail end of the locking block is propped against the inner rotating piece, so that the locking of the angle is kept fixed, and the stress is dispersed correspondingly, thereby being beneficial to improving the load capacity of products. It should be noted that the tooth end of the lock block is in engagement with the tooth portion of the lock adjustment space, and the direction of rotation of the lock block from the tooth end to the tail end is closer to the engagement point of the outer rotating member, and the key force receiving portion of the present utility model does not act on the tooth portion alone, but becomes the extrusion of the lock block from one end to the other end, and the structural strength of the structure is higher than that of the conventional mode, which is advantageous for improving the load capacity of the product.

Furthermore, preferably, in order to improve the loading capacity of the product, the angle adjusting device provided by the utility model is further designed, wherein the rotating group comprises two outer rotating pieces, and the inner rotating piece is clamped between the two outer rotating pieces. Still preferably, in the angle adjusting device according to the present utility model, the angle adjusting portions are a pair, and the two angle adjusting portions are symmetrically arranged about the rotation axis. In this embodiment, the locking piece has a sufficient thickness, and the middle portion is located in the inner adjusting space, and the two ends are located in the outer adjusting spaces of the upper and lower outer rotating pieces, respectively. Therefore, the stress is further dispersed through the addition of the structural members, and the load capacity of the product is further improved.

It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present utility model and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present utility model as defined in the following claims.

Claims

1. An angle adjusting device is characterized by comprising a rotating group (100) and at least one angle adjusting part (200) arranged on the rotating group (100), wherein the rotating group (100) comprises a rotating shaft (201), an inner rotating piece (203) and at least one outer rotating piece (202), the outer rotating piece (202) and the inner rotating piece (203) are arranged on the rotating shaft (201) and rotate around the rotating shaft (201), the angle adjusting part (200) comprises a locking block (204), an inner adjusting space (205) arranged on the inner rotating piece (203) and an outer adjusting space (206) arranged on the outer rotating piece (202), the locking block (204) is positioned in the outer adjusting space (206) and the inner adjusting space (205), the locking block (204) is provided with a locking state and an unlocking state in the inner adjusting space (205), the outer adjusting space (206) comprises a locking adjusting space (207) and an unlocking adjusting space (208), the unlocking adjusting space (208) is positioned in the locking space (207) and the inner adjusting space (207) when the inner rotating block (203) is connected with the locking space (202) in a locking state, the locking block (204) moves towards the side of the unlocking adjustment space (208) and is locked reversely; when the locking block (204) enters the unlocking adjustment space (208) through the unlocking part (209), the locking block (204) enters an unlocking state, the locking block (204) can move back and forth in the outer adjustment space (206), and when the locking block (204) collides with the tail end of the unlocking adjustment space (208), the locking block (204) enters the locking state.

2. The angle adjustment device according to claim 1, characterized in that the rotating group (100) comprises two outer rotating members (202), the inner rotating member (203) being sandwiched between the two outer rotating members (202).

3. The angle adjustment device according to claim 1 or 2, characterized in that the angle adjustment portions (200) are a pair, and the two angle adjustment portions (200) are arranged in a central symmetry about the rotation axis (201).

4. The angle adjustment device according to claim 1 or 2, characterized in that the locking block (204) has teeth at one end, the locking adjustment space (207) has teeth (213), and when the locking block (204) is in the locked state, the teeth ends of the locking block (204) cooperate with the teeth (213) of the locking adjustment space (207).

5. The angle adjusting device according to claim 4, characterized in that an elastic member (210) and a wedge-shaped portion (211) are provided in the inner adjusting space (205), the lock block (204) is located in the wedge-shaped portion (211), and the lock block (204) is in a locked state when the elastic member (210) drives the tooth end of the lock block (204) to be connected with the tooth portion (213) of the lock adjusting space (207).

6. The angle adjusting device according to claim 5, wherein the wedge-shaped portion (211) has a locking end, when the tail end of the locking block (204) is located at the locking end, the tooth end of the locking block (204) is in an active state, the elastic member (210) cooperates with the tooth end of the locking block (204) to drive the tooth end of the locking block (204) to keep connected with the tooth portion (213) of the locking adjusting space (207), and the locking block (204) is in a locked state.

7. The angle adjusting device according to claim 6, wherein when the lock block (204) is in a locked state, the lock block (204) is disposed obliquely to a rotation direction of a side of the unlock adjusting space (208) with respect to a tooth portion (213) of the lock adjusting space (207), the outer rotating member (202) rotates relative to the inner rotating member (203), and when the lock block (204) moves in a direction of the side of the unlock adjusting space (208), a tooth end of the lock block (204) is in an active state, and the elastic member (210) cooperates with the tooth end of the lock block (204) to urge the tooth end of the lock block (204) to be connected with the tooth portion (213) of the lock adjusting space (207); when the outer rotating member (202) and the inner rotating member (203) reversely rotate, the tooth part (213) of the locking adjusting space (207) is clamped at the tooth end of the locking block (204), the tooth end of the locking block (204) cannot move, the tail end of the locking block (204) has a trend of further moving towards the locking end direction, the locking end of the wedge part (211) is limited, and the outer rotating member (202) and the inner rotating member (203) cannot reversely rotate.

8. The angle adjusting device according to claim 7, wherein the wedge portion (211) has an unlocking end (214), and when the tooth end of the locking block (204) is located at the unlocking end (214), the tail end of the locking block (204) is located against the inner wall of the wedge portion (211) under the action of the elastic member (210), and the locking block (204) is in an unlocked state.

9. The angle adjusting device according to claim 8, wherein the unlocking portion (209) is a transitional slope, when the locking block (204) is in a locked state, the unlocking portion (209) pushes a tooth end of the locking block (204) to move toward an unlocking end (214) of the wedge portion (211), and when the tooth end of the locking block (204) is connected with the unlocking end (214) of the wedge portion (211), the locking block (204) enters the unlocking adjusting space (208), and the locking block (204) enters the unlocked state.

10. The angle adjustment device according to any of the claims 1-2, further comprising a first rotation handle (110) and a second rotation handle (120), wherein the first rotation handle (110) is fixedly connected to the inner rotation member (203), and wherein the second rotation handle (120) is fixedly connected to the outer rotation member (202).