Rotary mechanism and photographic auxiliary device

Abstract

The present application belongs to the technical field of photographic accessories, and particularly relates to a rotating mechanism and a photographic auxiliary device. The rotating mechanism comprises a shell, a receiving cavity is formed in the shell; a rotating assembly is installed in the receiving cavity, the rotating assembly comprises a first rotating part and a second rotating part which are connected with each other, the first rotating part is used for connecting an external device, the second rotating part can rotate together with the first rotating part around the same axis; a locking part is arranged at an end of the second rotating part which is away from the first rotating part; a driving part is connected with the second rotating part, the driving part is used for driving the second rotating part to move along the axis direction relative to the first rotating part until the locking part is clamped between the second rotating part and the inner wall of the shell, at this time, the locking part is used for limiting the second rotating part from rotating around the axis. The rotating mechanism can solve the technical problem of how to realize the locking of the photographic device at any angle.

Description

Technical Field

[0001] This invention belongs to the field of photographic accessories technology, and in particular relates to a rotating mechanism and a photographic auxiliary device. Background Technology

[0002] In video, film, and photography scenarios, it's often necessary to adjust the angle of camera equipment. A common method involves using screws to adjust the distance between two friction components, controlling the friction to achieve stepless rotation and locking. However, this locking effect is less than ideal for large equipment with high torque, requiring excessive tightening force and making operation inconvenient. To handle such high-torque scenarios, the common practice is to use two toothed discs, adjusting their engagement and disengagement to achieve locking and unlocking. However, this locking method has a drawback: when the camera is adjusted to a certain angle and locked, the two toothed discs may not necessarily be fully engaged; their teeth may just be abutting. This means that this locking method cannot guarantee locking at any angle, creating a certain blind spot. Summary of the Invention

[0003] The purpose of this application is to provide a rotating mechanism that solves the technical problem of how to lock a photographic device at any angle.

[0004] To achieve the above objectives, this application provides a rotating mechanism, including a housing with a receiving cavity; a rotating assembly installed within the receiving cavity, the rotating assembly including a first rotating member and a second rotating member connected to each other, the first rotating member being used to connect to an external device, and the second rotating member being rotatable together with the first rotating member around the same axis; a locking member disposed at the end of the second rotating member away from the first rotating member; and a driving member connected to the second rotating member, the driving member being used to drive the second rotating member to move relative to the first rotating member along the axial direction until the locking member clamps the second rotating member between the second rotating member and the inner wall of the housing, the locking member being used to restrict the rotation of the second rotating member around the axis.

[0005] In some embodiments, when the locking member is clamped between the second rotating member and the inner wall of the housing, the locking member contacts and presses against the second rotating member.

[0006] In some embodiments, the locking member includes a rolling element and a bracket. The bracket is disposed at the end of the second rotating member opposite to the first rotating member. The rolling element is rotatably disposed on the end face of the second rotating member opposite to the first rotating member. The bracket is used to limit the position of the rolling element. The rolling element protrudes from the surface of the bracket. The housing includes an abutment surface that clamps the rolling element together with the second rotating member. From the end face of the second rotating member corresponding to the rolling element, along a first rotation direction or a second rotation direction, the distance between the end face of the second rotating member and the abutment surface gradually decreases. Wherein, the first rotation direction and the second rotation direction are the rotation directions of the second rotating member, and the first rotation direction and the second rotation direction are opposite.

[0007] In some embodiments, the end face of the second rotating member away from the first rotating member includes multiple guide surfaces connected in sequence, the multiple guide surfaces surrounding the axis, the rolling member being disposed at the connection point of two adjacent guide surfaces, and the distance between the connection point of the guide surface and the abutting surface being greater than the distance between any position on the guide surface and the abutting surface.

[0008] In some embodiments, the rolling element is a roller or a ball.

[0009] In some embodiments, the housing includes a peripheral wall surrounding the axis, a bottom wall perpendicular to the axis, and a tapered wall connecting the peripheral wall and the bottom wall. The surface of the tapered wall is angled to the axis. The distance between the tapered wall and the axis gradually decreases from the second rotating member toward the direction away from the first rotating member. The second rotating member includes an inclined surface corresponding to the tapered wall. The rolling member is disposed on the inclined surface and is clamped between the inclined surface and the tapered wall.

[0010] In some embodiments, an annular groove is provided at the end of the second rotating member away from the first rotating member. The annular groove is arranged around the axis, and a screw is fixedly connected to the bottom of the annular groove. The bracket is clamped between the nut of the screw and the second rotating member to restrict the movement of the bracket along the axis. A protrusion is provided on the side of the bracket facing the second rotating member, and an elastic member is provided between the protrusion and the screw.

[0011] In some embodiments, the rotating mechanism further includes an elastic reset member located between the second rotating member and the inner wall of the housing. The two ends of the elastic reset member abut against the second rotating member and the inner wall of the housing, respectively. When the second rotating member moves toward the inner wall of the housing, the elastic reset member is compressed between the second rotating member and the inner wall of the housing.

[0012] In some embodiments, the driving member includes a locking rod and a rotating rod connected to the locking rod. The locking rod extends along the axial direction. The end of the housing along the axial direction has a first through hole. The second rotating member has a second through hole corresponding to the first through hole. The locking rod passes through the first through hole and the second through hole respectively. The locking rod is threadedly connected to the first through hole. The rotating rod is located outside the housing. The end of the locking rod away from the rotating rod has an abutment portion. The abutment portion is used to push the second rotating member to move away from the first rotating member along the axial direction.

[0013] This application also provides a photography assist device, which includes the above-described rotating mechanism. The photography assist device further includes a rotating component for mounting photography equipment, and the rotating component is fixedly connected to the first rotating member.

[0014] The rotating mechanism and photographic auxiliary equipment provided in this application allow the photographic equipment to be connected to the first rotating component. When it is necessary to lock the angle of the photographic equipment, it is only necessary to drive the second rotating component to move towards the inner wall of the outer shell and clamp the locking component between the second rotating component and the inner wall of the outer shell. Locking can be completed by restricting the rotation of the second rotating component through the locking component. No matter what angle the first rotating component rotates to, the axial movement of the second rotating component will not be affected, and the locking component can be clamped between the second rotating component and the inner wall of the outer shell. Therefore, this application can achieve locking at any angle. During use, the user only needs to apply force to the driving component to move the second rotating component towards the inner wall of the outer shell, which is very labor-saving and convenient. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the photographic auxiliary device provided in the embodiments of this application;

[0017] Figure 2 This is a schematic diagram of the overall structure of the rotating mechanism provided in the embodiments of this application;

[0018] Figure 3 This is a schematic diagram of the split structure of the rotating mechanism provided in the embodiments of this application;

[0019] Figure 4 This is a partially exploded structural diagram of the rotating mechanism provided in the embodiments of this application;

[0020] Figure 5 This is a cross-sectional structural diagram of the rotating mechanism provided in the embodiments of this application.

[0021] The following are the labeling elements in the figure:

[0022] 10. Outer shell; 11. First shell; 12. Second shell; 13. Peripheral wall; 14. Bottom wall; 15. Conical wall; 16. First through hole; 20. Rotating assembly; 21. First rotating component; 211. Annular groove; 22. Second rotating component; 221. Guide surface; 222. Annular groove; 223. Screw; 224. Inclined surface; 225. Second through hole; 30. Locking component; 31. Rolling component; 32. Bracket; 321. Clearance hole; 322. Fixing hole; 40. Driving component; 41. Locking rod; 411. Abutment part; 42. Rotating rod; 50. Elastic reset component; 60. Elastic component; 70. Bearing; 80. Fixing pin; 100. Support rod; 200. Rotating component. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. 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. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. 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.

[0024] In the description of this invention, it should be understood that the terms "lateral", "thickness", "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] Please see Figure 1 This application provides a photography assistance device that can be mounted on a photographic device to assist it in taking pictures. The photographic device can be any electronic device with a camera, such as a camera, mobile phone, or tablet computer. The photography assistance device includes a rotating component 200 and a rotating mechanism. The rotating component 200 is used to mount the photographic device. The photography assistance device also includes a support rod 100, on which the rotating mechanism can be mounted. Other photographic devices can also be mounted on the support rod 100.

[0027] See Figure 2 , Figure 3 as well as Figure 5 The rotating mechanism includes a housing 10 and a rotating assembly 20. The housing 10 forms a receiving cavity, and the rotating assembly 20 can be installed inside the receiving cavity. The rotating assembly 20 includes a first rotating member 21 and a second rotating member 22 connected to each other. The first rotating member 21 is used to connect to an external device, and the second rotating member 22 can rotate together with the first rotating member 21 about the same axis. It is understood that the rotating component 200 is connected to the first rotating member 21, and when the photographic equipment rotates, the first rotating member 21 and the second rotating member 22 can rotate together with the photographic equipment. The second rotating member 22 can be a rotating member with an internal cavity. The first rotating member 21 is a rod-shaped structure. The first rotating member 21 extends into the cavity of the second rotating member 22. The circumferential surface of the first rotating member 21 can include multiple interconnected connecting surfaces. The cavity wall of the second rotating member 22 also has an inner wall surface that is adapted to the connecting surface of the first rotating member 21. Therefore, when the first rotating member 21 extends into the cavity of the second rotating member 22, the rotation of the first rotating member 21 will drive the second rotating member 22 to rotate. The first rotating member 21 and the second rotating member 22 can also move relative to each other along the axial direction.

[0028] The rotating mechanism also includes a locking member 30 and a driving member 40. The locking member 30 is located at the end of the second rotating member 22 away from the first rotating member 21. The driving member 40 is connected to the second rotating member 22 and is used to drive the second rotating member 22 to move relative to the first rotating member 21 along the axial direction until the locking member 30 is clamped between the second rotating member 22 and the inner wall of the housing 10. At this time, the locking member 30 can be used to restrict the second rotating member 22 from rotating around the axis.

[0029] When it is necessary to lock the angle of the photographic equipment, it is only necessary to drive the second rotating member 22 to move towards the inner wall of the outer shell and clamp the locking member 30 between the second rotating member and the inner wall of the outer shell 10. The locking can be completed by restricting the rotation of the second rotating member 22 by the locking member 30. No matter what angle the first rotating member 21 rotates to, the axial movement of the second rotating member 22 will not be affected, and the locking member 30 can be clamped between the second rotating member 22 and the inner wall of the outer shell 10. Therefore, this application can achieve locking at any angle.

[0030] In some embodiments, when the locking member 30 is clamped between the second rotating member 22 and the inner wall of the housing 10, the locking member 30 contacts and presses against the second rotating member 22. At this time, the friction between the locking member 30 and the second rotating member 22 restricts the rotation of the second rotating member 22. The rotation of the second rotating member 22 along both the first rotation direction a and the second rotation direction b is restricted by the locking member 30, with the first rotation direction a and the second rotation direction b being opposite. Specifically, as shown... Figure 4 As shown, the first rotation direction a is clockwise and the second rotation direction b is counterclockwise. Here, "clockwise" and "counterclockwise" can be understood as forward rotation and the other can be understood as reverse rotation. That is, the rotation of the second rotating member 22 in both opposite directions is restricted by the locking member 30, thereby ensuring the locking effect.

[0031] Preferably, the locking member 30 includes a rolling element 31 and a bracket 32. The bracket 32 ​​is disposed at the end of the second rotating member 22 opposite to the first rotating member 21. The rolling element 31 is rotatably disposed on the end face of the second rotating member 22 opposite to the second rotating member 22. The bracket 32 ​​is used to restrict the position of the rolling element 31, so that the rolling element 31 can roll on the end face of the second rotating member 22 without separating from the second rotating member 22. The bracket 32 ​​may be provided with a clearance hole 321. The rolling element 31 passes through the clearance hole 321 and protrudes from the surface of the bracket 32. Therefore, when the second rotating member 22 moves toward the inner wall of the outer casing 10, the inner wall of the outer casing 10 eventually abuts against the rolling element 31 instead of the bracket 32.

[0032] The outer casing 10 includes an abutment surface that, together with the second rotating member 22, clamps the rolling member 31. Along the first rotation direction a or the second rotation direction b, the distance between the end face of the second rotating member 22 and the abutment surface gradually decreases from the area corresponding to the rolling member 31. When the rolling member 31 contacts the abutment surface, there is friction between the rolling member 31 and the abutment surface. When the second rotating member 22 continues to rotate along the first rotation direction a or the second rotation direction b, the rolling member 31 tends to roll along the first rotation direction a or the second rotation direction b. However, because the distance between the rolling member 31 and the abutment surface gradually decreases along the first rotation direction a or the second rotation direction b, the space for the rolling member 31 to roll to both sides becomes smaller and smaller. This small space restricts the rolling member 31 from rolling, and the pressure between the rolling member 31 and the abutment surface, as well as the end face of the second rotating member 22, increases, resulting in greater friction. This locks the second rotating member 22, preventing it from rotating further, thus ensuring a locking effect.

[0033] In some embodiments, such as Figure 4As shown, the end face of the second rotating member 22 facing away from the first rotating member 21 includes multiple guide surfaces 221 connected in sequence. These guide surfaces 221 surround an axis and connect to form a closed annular surface. Rolling members 31 are positioned at the junctions of adjacent guide surfaces 221. Since the guide surfaces 221 can form multiple junctions, multiple rolling members 31 can be provided. The distance between the junction of the guide surfaces 221 and the contact surface is greater than the distance between any point on the guide surface 221 and the contact surface; that is, the multiple guide surfaces 221 form multiple "crests" and "troughs". The rolling element 31 is located at the "trough". When the rolling element 31 contacts the abutting surface, there is friction between the rolling element 31 and the abutting surface. When the second rotating element 22 continues to rotate, the rolling element 31 tends to roll along the guide surface 221 towards the "crest". However, the space for the rolling element 31 to roll towards the "crest" becomes smaller and smaller, which restricts the rolling element 31 from rolling. The pressure between the rolling element 31 and the abutting surface and the end face of the second rotating element 22 becomes larger and larger, causing the rolling element 31 to get stuck between the abutting surface and the end face of the second rotating element 22, thereby locking the second rotating element 22 and preventing it from rotating.

[0034] By providing multiple guide surfaces 221, multiple rolling elements 31 can be provided accordingly. These multiple rolling elements 31 collectively restrict the rotation of the second rotating element 22, thereby increasing the locking force on the second rotating element 22. Furthermore, since the multiple guide surfaces 221 connect to form a closed annular surface, and the rotation trajectory of the second rotating element 22 is circular, when the second rotating element 22 rotates, the direction of the locking force exerted by the rolling elements 31 on the guide surface 221 on the second rotating element 22 is tangential to the circular trajectory of the second rotating element 22's rotation. Therefore, the restriction effect on the rotation of the second rotating element 22 can be enhanced. Optionally, the guide surface 221 can be an arc-shaped surface or a plane.

[0035] The rolling element 31 can be a roller or a ball, preferably a roller. The difference between a roller and a ball is that when the second rotating element 22 and the abutment surface press against the rolling element 31, the second rotating element 22 and the abutment surface are in line contact with the rolling element 31. When the second rotating element 22 and the abutment surface press against the ball, the second rotating element 22 and the abutment surface are in point contact with the ball. Therefore, when the rolling element 31 is a roller, the rolling element 31 experiences greater friction and has a better locking effect on the second rotating element 22.

[0036] In some embodiments, the housing 10 includes a peripheral wall 13 surrounding an axis, a bottom wall 14 perpendicular to the axis, and a tapered wall 15 connecting the peripheral wall 13 and the bottom wall 14. The surface of the tapered wall 15 is angled to the axis. From the second rotating member 22 toward the direction away from the first rotating member 21, the distance between the tapered wall 15 and the axis gradually decreases. The second rotating member 22 includes an inclined surface 224 corresponding to the tapered wall 15. A rolling member 31 is disposed on the inclined surface 224 and is clamped between the inclined surface 224 and the tapered wall 15.

[0037] In addition, such as Figure 4 As shown, an annular groove 222 is provided on the end face of the second rotating member 22 facing away from the first rotating member 21. The annular groove 222 is arranged around the axis, and a screw 223 is fixedly connected to the bottom of the annular groove 222. The nut of the screw 223 is spaced from the end face of the second rotating member 22, so the bracket 32 ​​can be clamped between the nut of the screw 223 and the end face of the second rotating member 22, thereby restricting the movement of the bracket 32 ​​along the axial direction, so that the bracket 32 ​​can only rotate around the axis relative to the second rotating member 22 at a small angle. A fixing hole 322 for the screw 223 to pass through can be provided on the bracket 32. The shank of the screw 223 passes through the fixing hole 322, and the nut of the screw 223 presses against the surface of the bracket 32. Multiple screws 223 can be provided, and the multiple screws 223 can be arranged symmetrically to each other, so as to make the bracket 32 ​​more stable.

[0038] The bracket 32 ​​has a protrusion on the side facing the second rotating member 22. An elastic element 60 is disposed between the protrusion and the screw 223. When the rolling member 31 abuts against the contact surface, continuing to rotate the second rotating member 22 will cause the bracket 32 ​​to rotate at a small angle relative to the second rotating member 22. Through the action of the elastic element 60, after the rolling member 31 separates from the contact surface, the bracket 32 ​​can return to its initial position. In this application, the elastic element 60 can be a spring or a sheet spring, and the number of elastic elements 60 can be multiple, such as four, five, six, seven or more. This application does not limit this.

[0039] The rotating mechanism also includes an elastic reset member 50, which is located between the second rotating member 22 and the inner wall of the outer casing 10. The two ends of the elastic reset member 50 abut against the second rotating member 22 and the inner wall of the outer casing 10, respectively. When the second rotating member 22 moves toward the inner wall of the outer casing 10, the elastic reset member 50 is compressed between the second rotating member 22 and the inner wall of the outer casing 10, and begins to accumulate elastic force. When unlocking is required, the driving member 40 no longer acts on the second rotating member 22. At this time, the elastic reset member 50 releases its elastic force, pushing the bracket 32, the rolling member 31 and the second rotating member 22 away from the inner wall of the outer casing 10. At this time, the rolling member 31 disengages from the inner wall of the outer casing 10, and the unlocking is completed.

[0040] In some embodiments, the drive member 40 includes a locking rod 41 and a rotating rod 42 fixedly connected to the locking rod 41. The locking rod 41 and the rotating rod 42 can be connected by fasteners such as screws. The screws pass through the locking rod 41 and the rotating rod 42 respectively to fix the locking rod 41 and the rotating rod 42. Of course, the locking rod 41 and the rotating rod 42 can also be fixedly connected by bonding or welding. The locking rod 41 and the rotating rod 42 can also be integrally formed. The outer casing 10 has a first through hole 16 at its axial end, and the second rotating component 22 has a second through hole 225. The locking rod 41 is threadedly connected to the first through hole 16, and the rotating rod 42 is located outside the outer casing 10. When the rotating rod 42 is rotated, the locking rod 41 can move along the axial direction. The end of the locking rod 41 away from the rotating rod 42 is provided with an abutment part 411, which is used to push the second rotating component 22 to move away from the first rotating component 21 along the axial direction. Locking and unlocking are achieved by using the rotating rod 42, which can extend the lever arm, making locking and unlocking more effortless and convenient. To improve the smoothness of rotation, a bearing 70 is also provided between the locking rod 41 and the second rotating component 22.

[0041] In addition, the outer shell 10 includes a first shell 11 and a second shell 12 connected to each other. Both the first shell 11 and the second shell 12 have accommodating cavities. The accommodating cavities of the first shell 11 and the second shell 12 are connected. The second rotating member 22 is housed in the accommodating cavity of the second shell 12. The first rotating member 21 passes through the accommodating cavity of the first shell 11 and is connected to the second rotating member 22. The first shell 11 and the second shell 12 can protect the first rotating member 21 and the second rotating member 22 inside. The first shell 11 and the second shell 12 can be connected by fasteners, or by bonding, welding or snap-fit ​​connection.

[0042] In addition, a fixing pin 80 is provided on the first housing 11. The fixing pin 80 extends in a direction perpendicular to the axis. The fixing pin 80 passes through the peripheral walls of the second housing 12 and the first housing 11 in sequence and extends toward the first rotating member 21. A positioning groove is provided around the periphery of the first rotating member 21. The fixing pin 80 is inserted into the positioning groove, thereby restricting the first rotating member 21 from moving axially, so that the first rotating member 21 can only rotate.

[0043] The locking process of this application is as follows: When the rotary rod 42 is tightened, the locking rod 41 will drive the second rotating part 22, the rolling part 31, and the bracket 32 ​​to move axially together. At this time, the elastic reset part 50 accumulates elastic force. When the rolling part 31 abuts against the inner wall of the outer shell 10, the rotary rod 42 will hardly continue to rotate. At this time, there is friction between the rolling part 31 and the inner wall of the outer shell 10. When the second rotating part 22 is to be rotated, no matter which direction it is rotated, the rolling part 31 will tend to roll along the guide surface 221. However, due to the reduction in the rolling space, the rolling part 31 will hardly roll anymore. The rolling part 31 will be stuck between the second rotating part 22 and the inner wall of the outer shell 10. The second rotating part 22 will hardly continue to rotate. The first rotating part 21 and the rotating component 200 connecting the second rotating part 22 will also hardly rotate anymore. At this time, the rotating component 200 is in a locked state, that is, the photographic equipment is in a locked state.

[0044] The unlocking process of this application is as follows: When the rotating mechanism is in the locking process, the rotating rod 42 is loosened, and the locking rod 41 moves in the axial direction. At this time, the elastic reset member 50 releases the elastic force, pushing the bracket 32, the rolling member 31 and the second rotating member 22 away from the inner wall of the outer shell 10. At this time, the rolling member 31 is separated from the inner wall surface of the outer shell 10 and has no friction with the inner wall of the outer shell 10. At this time, the second rotating member 22 is unlocked and can rotate freely. The first rotating member 21 and the rotating component 200 can both rotate freely at any angle with the second rotating member 22.

[0045] In summary, the rotating mechanism and photographic auxiliary equipment provided in this application allow the photographic equipment to be connected to the first rotating member 21. When it is necessary to lock the angle of the photographic equipment, it is only necessary to drive the second rotating member 22 towards the inner wall of the outer shell and clamp the locking member 30 between the second rotating member and the inner wall of the outer shell 10. Locking can be completed by restricting the rotation of the second rotating member 22 through the locking member 30. No matter what angle the first rotating member 21 rotates to, the axial movement of the second rotating member 22 will not be affected, and the locking member 30 can be clamped between the second rotating member 22 and the inner wall of the outer shell 10. Therefore, this application can achieve locking at any angle. During use, the user only needs to apply force to the driving member 40 to move the second rotating member 22 towards the inner wall of the outer shell 10, which is very labor-saving and convenient.

[0046] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A rotating mechanism, characterized in that, include: The outer shell (10) has a receiving cavity; A rotating assembly (20) is installed in the receiving cavity. The rotating assembly (20) includes a first rotating member (21) and a second rotating member (22) connected to each other. The first rotating member (21) is used to connect to an external device, and the second rotating member (22) can rotate together with the first rotating member (21) around the same axis. A locking member (30) is provided at the end of the second rotating member (22) away from the first rotating member (21); A driving member (40) is connected to the second rotating member (22). The driving member (40) is used to drive the second rotating member (22) to move relative to the first rotating member (21) along the axial direction until the locking member (30) is clamped between the second rotating member (22) and the inner wall of the outer shell (10). At this time, the locking member (30) is used to restrict the second rotating member (22) from rotating around the axial direction. When the locking member (30) is clamped between the second rotating member (22) and the inner wall of the outer shell (10), the locking member (30) contacts and presses against the second rotating member (22). The friction between the locking member (30) and the second rotating member (22) restricts the rotation of the second rotating member (22).

2. The rotating mechanism as described in claim 1, characterized in that, The locking member (30) includes a rolling member (31) and a bracket (32). The bracket (32) is disposed at the end of the second rotating member (22) opposite to the first rotating member (21). The rolling member (31) is rotatably disposed on the end face of the second rotating member (22) opposite to the first rotating member (21). The bracket (32) is used to limit the position of the rolling member (31). The rolling member (31) protrudes from the surface of the bracket (32). The outer shell (10) includes an abutting surface that clamps the rolling member (31) together with the second rotating member (22). From the area of ​​the end face of the second rotating member (22) corresponding to the rolling member (31), along the first rotation direction or the second rotation direction, the distance between the end face of the second rotating member (22) and the abutting surface gradually decreases. The first rotation direction and the second rotation direction are the rotation directions of the second rotating member (22), and the first rotation direction and the second rotation direction are opposite.

3. The rotating mechanism as described in claim 2, characterized in that, The end face of the second rotating member (22) away from the first rotating member (21) includes multiple guide surfaces (221) connected in sequence. The multiple guide surfaces (221) surround the axis. The rolling member (31) is disposed at the connection of two adjacent guide surfaces (221). The distance between the connection of the guide surfaces (221) and the abutting surface is greater than the distance between any position on the guide surface (221) and the abutting surface.

4. The rotating mechanism as described in claim 2, characterized in that, The rolling element (31) is a roller or a ball.

5. The rotating mechanism as described in claim 3, characterized in that, The outer casing (10) includes a peripheral wall (13) surrounding the axis, a bottom wall (14) perpendicular to the axis, and a conical wall (15) connecting the peripheral wall (13) and the bottom wall (14). The surface of the conical wall (15) is set at an angle to the axis. From the second rotating member (22) toward the direction away from the first rotating member (21), the distance between the conical wall (15) and the axis gradually decreases. The second rotating member (22) includes an inclined surface (224) corresponding to the conical wall (15). The rolling member (31) is disposed on the inclined surface (224) and is held between the inclined surface (224) and the conical wall (15).

6. The rotating mechanism as described in claim 2, characterized in that, The end face of the second rotating member (22) facing away from the first rotating member (21) is provided with an annular groove (222), the annular groove (222) is arranged around the axis, and a screw (223) is fixedly connected to the bottom of the annular groove (222). The bracket (32) is clamped between the nut of the screw (223) and the second rotating member (22) to restrict the movement of the bracket (32) along the axis. A protrusion is provided on the side of the bracket (32) facing the second rotating member (22), and an elastic member (60) is provided between the protrusion and the screw (223).

7. The rotating mechanism as described in any one of claims 1 to 6, characterized in that, The rotating mechanism further includes an elastic reset member (50), which is located between the second rotating member (22) and the inner wall of the outer shell (10). The two ends of the elastic reset member (50) abut against the inner wall of the second rotating member (22) and the outer shell (10), respectively. When the second rotating member (22) moves toward the inner wall of the outer shell (10), the elastic reset member (50) is compressed between the second rotating member (22) and the inner wall of the outer shell (10).

8. The rotating mechanism as described in any one of claims 1 to 6, characterized in that, The driving component (40) includes a locking rod (41) and a rotating rod (42) connected to the locking rod (41). The locking rod (41) extends along the axial direction. The outer shell (10) has a first through hole (16) at its end along the axial direction. The second rotating component (22) has a second through hole (225) corresponding to the first through hole (16). The locking rod (41) passes through the first through hole (16) and the second through hole (225) respectively. The locking rod (41) is threadedly connected to the first through hole (16). The rotating rod (42) is located outside the outer shell (10). The end of the locking rod (41) away from the rotating rod (42) is provided with an abutment (411). The abutment (411) is used to push the second rotating component (22) to move away from the first rotating component (21) along the axial direction.

9. A photographic auxiliary device, characterized in that, Including the rotating mechanism as described in any one of claims 1 to 8, the photographic auxiliary device further includes a rotating component (200) for mounting photographic equipment, the rotating component (200) being fixedly connected to the first rotating member (21).

Images