Clutch, supporting leg assembly and photographing supporting frame

Abstract

The utility model discloses a clutch, a supporting leg assembly and a photographing supporting frame. The clutch comprises a driving component which is used for being connected with a driving assembly so as to be driven by the driving assembly to move; the driven component is used for being connected with the locking and releasing assembly so as to drive the locking and releasing assembly to move; the clutch control assembly is movably arranged between the driving component and the driven component; the clutch control assembly is used for being connected with the driving component and the driven component so that the driving component can be driven by the driving assembly to drive the driven component and the locking and releasing assembly to move. And the clutch control assembly is used for separating the driving component from the driven component so as to prevent the driving component from driving the driven component and the locking and releasing assembly to move under the driving of the driving assembly. The driving component and the driven component can be separated, a user can directly control the locking mechanism through the driven component, position locking or position unlocking of a certain supporting leg assembly can be independently completed, and the installation efficiency of the photography supporting frame can be improved.

Description

Technical Field

[0001] The utility model relates to the field of photography auxiliary equipment, in particular to a clutch and a supporting foot assembly. Background Art

[0002] With the continuous development and popularization of photographic equipment, photographic support stands are becoming more and more important as the main tool for stabilizing cameras, especially when certain photographic effects need to be achieved. For example, if users want to take night scenes or pictures with moving tracks, the exposure time needs to be increased. At this time, the digital camera cannot shake, and the help of a photographic support stand is very much needed.

[0003] In order to adapt to the adjustment of the length of the support leg assembly of the support device in the field of photographic equipment, such as in order to adjust the length of the support leg assembly of a photographic support stand, the support leg assembly is composed of multiple sets of inner tubes and outer tubes. After reaching the target adjustment length, it needs to be locked with a locking structure to prevent it from shrinking. In order to reduce the burden on users, the locking structure is usually set to synchronize operation, that is, the support leg assembly of the photographic support stand can only achieve position locking or position unlocking at the same time. However, in actual use, it is often necessary to adjust the length of a certain support leg assembly separately. For example, after installation, it is found to be unstable, or the length of the support leg assembly does not adapt to the new terrain after moving. At this time, if it is unlocked synchronously, it is easy to shrink all the support leg assemblies, requiring the user to readjust the length of each support leg assembly, which increases the difficulty of operation and affects the user experience. Utility Model Content

[0004] The main purpose of the utility model is to provide a clutch, aiming to solve the problem that the existing photography support frame locking structure can only be locked or unlocked synchronously.

[0005] To achieve the above-mentioned purpose, the utility model provides a clutch, which is used in a support leg assembly of a photographic support frame to engage or disengage a drive assembly and a lock-release assembly; the clutch comprises:

[0006] An active component, used to be connected to the driving assembly so as to move under the drive of the driving assembly;

[0007] A driven component, used to be connected to the locking and releasing assembly to drive the locking and releasing assembly to move;

[0008] A clutch control component, wherein the clutch control component is movably disposed between the active component and the driven component;

[0009] The clutch control assembly is used to engage the active component and the driven component to allow the active component to drive the driven component and the lock-release assembly to move under the drive of the drive assembly; and the clutch control assembly is used to separate the active component and the driven component to prevent the active component from driving the driven component and the lock-release assembly to move under the drive of the drive assembly.

[0010] In some embodiments, the clutch control assembly includes a clamping member and a control component, wherein the clamping member is used to engage or disengage the active member and the driven member;

[0011] The control component is arranged between the clamping component and the active component, and is used to drive the clamping component and the active component to move relative to each other under the action of external force, so that the clamping component is separated from the active component; or, the control component is arranged between the clamping component and the driven component, and is used to drive the clamping component and the driven component to move relative to each other under the action of external force, so that the clamping component is separated from the driven component.

[0012] In some embodiments, the clamping member is configured as a limiting column, the active member is configured as a first limiting groove, and the driven member is configured as a second limiting groove;

[0013] The operating component can move between an engaged position and a disengaged position. When the operating component is in the engaged position, both ends of the limit column are respectively engaged with the first limit groove and the second limit groove; when the operating component is in the disengaged position, the limit column is engaged with one of the first limit groove and the second limit groove and is separated from the other.

[0014] In some embodiments, at least one protrusion is provided on the manipulation component, and at least one groove is provided on the clamping member corresponding to the protrusion, and the groove is configured with a guide surface for guiding the protrusion to move along the guide surface;

[0015] When the operating component is located at the engaging position, the protrusion is engaged with the groove; when the operating component is located at the disengaging position, the protrusion is separated from the groove.

[0016] In some embodiments, the driven component is configured with a concave cavity, the active component and the clutch control assembly are both accommodated in the concave cavity, and the second limiting groove is disposed on the inner wall of the driven component.

[0017] In some embodiments, the driven component further comprises a cover plate covering the opening of the cavity, the cover plate being configured with a through hole, and the driving assembly can be connected to the active component through the through hole.

[0018] In some embodiments, the clutch control assembly further includes a first elastic member, wherein the first elastic member is disposed between the clamping member and the driven member, and / or,

[0019] The clutch mechanism further includes a second elastic member, and the second elastic member is arranged between the active component and the cover plate.

[0020] In some embodiments, the active component is configured with a mounting hole, the drive assembly includes at least one drive rod, the mounting hole is used to cooperate with the drive assembly so that the movement of the drive assembly can be transmitted to the active component; and / or,

[0021] The driven component is configured with a connecting column, the connecting column is configured with two sections of threads with opposite rotation directions, and the locking and releasing assembly is threadedly connected to the connecting column.

[0022] The utility model further proposes a support foot assembly for use in a photographic support frame, comprising:

[0023] Fixed seat;

[0024] A fixing rod, one end of which is connected to the fixing seat;

[0025] A movable rod, the movable rod being movably connected to the fixed rod;

[0026] a locking assembly connected between the fixed rod and the movable rod, for locking the movable rod and the fixed rod to prevent the movable rod from moving relative to the fixed rod, and for unlocking the movable rod and the fixed rod to allow the movable rod to move relative to the fixed rod;

[0027] A driving assembly, the driving assembly comprising a driving rod, the driving rod being connected to the locking and releasing assembly to drive the locking and releasing assembly to lock or release the movable rod and the fixed rod;

[0028] In the clutch described in any one of the aforementioned embodiments, the fixing rod is connected to the locking and releasing assembly through the clutch.

[0029] The utility model further proposes a photographic support frame, comprising a support base and at least two support leg assemblies described in the aforementioned embodiments, wherein the support base is connected to the fixing bases of the at least two support leg assemblies for connecting a photographic device.

[0030] The utility model provides a clutch control component between the active component and the driven component, so that the user can drive the active component and the driven component through the driving mechanism, and then control the locking mechanism connected to the driven component to lock or unlock the position of all the supporting leg components, or disconnect the connection between the active component and the driven component by controlling the clutch control component on a certain supporting leg component, so that the user can directly control the locking mechanism through the driven component to complete the position locking or unlocking of the supporting leg assembly alone, which is convenient for adjusting the length of the supporting leg assembly, so that the photographic support stand can adapt to more complex installation environments, and the installation efficiency of the photographic support stand can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of an embodiment of a clutch of the utility model;

[0032] Figure 2 for Figure 1 Exploded view of the mid clutch;

[0033] Figure 3 It is a structural schematic diagram of the active component in the clutch of the utility model;

[0034] Figure 4 It is a structural schematic diagram of the driven component in the clutch of the utility model;

[0035] Figure 5 This is a schematic diagram of the structure of the clamping member in the clutch of the utility model;

[0036] Figure 6 It is a structural schematic diagram of the control components in the clutch of the utility model.

[0037] Reference numerals:

[0038] 100, active component; 110, first limiting groove; 111, mounting hole; 200, driven component; 210, second limiting groove; 220, concave cavity; 230, cover plate; 231, through hole; 240, connecting column; 300, clutch control assembly; 310, snap-in piece; 311, limiting column; 312, groove; 320, control component; 321, protrusion; 400, drive rod; 500, lock and release assembly. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the scheme in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0042] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0043] The utility model provides a clutch, which is used in a support leg assembly of a photographic support frame to engage or separate a drive assembly and a lock-release assembly 500; Figure 1 and Figure 2 , the clutch comprises:

[0044] The active component 100 is used to be connected to the driving component so as to move under the driving of the driving component;

[0045] The driven member 200 is used to connect with the locking and releasing assembly 500 to drive the locking and releasing assembly 500 to move;

[0046] A clutch control assembly 300, which is movably disposed between the active component 100 and the driven component 200;

[0047] The clutch control assembly 300 is used to engage the active component 100 and the driven component 200 to allow the active component 100 to drive the driven component 200 and the lock-release assembly 500 to move under the drive of the driving assembly; and the clutch control assembly 300 is used to separate the active component 100 and the driven component 200 to prevent the active component 100 from driving the driven component 200 and the lock-release assembly 500 to move under the drive of the driving assembly.

[0048] The support leg assembly of the photography support stand generally includes a driving assembly and a locking assembly 500. The user controls the driving assembly to control the locking assembly 500 to lock or unlock the position of the support leg assembly. The arrangement and connection method of the driving assembly and the locking assembly 500 can refer to the common photography support stands on the market, and the present invention does not limit this.

[0049] The clutch in this embodiment includes an engaged state and a disengaged state. The driving assembly is connected to the locking assembly 500 through the clutch, so that the user can control the connection between the driving assembly and the locking assembly 500 through the clutch. Specifically, when the clutch is in the engaged state, the active component 100 is statically connected to the driven component 200, and the movement of the active component 100 will drive the movement of the driven component 200. At this time, the user can control multiple locking mechanisms through the driving mechanism and complete the position locking or position unlocking of all the supporting leg components; when the clutch is in the disengaged state, the clutch control assembly 300 separates the active component 100 from the driven component 200, and the driven component 200 can move independently. At this time, the user can directly control the driven component 200 to complete the position locking or position unlocking of the supporting leg components.

[0050] It is understandable that there are many ways to connect the active component 100 and the driven component 200, usually by snap-on connection, or other detachable connections, such as using magnetic materials to make the active component 100 or the driven component 200, so that the two are connected by magnetism. The way to separate the active component 100 and the driven component 200 can be set as needed, for example, the clutch control component 300 directly lifts the active component 100 so that the active component 100 is suspended in the air; the clutch control component 300 applies a reverse magnetic field to temporarily eliminate the magnetism of the active component 100 and the driven component 200; or by changing the connection method between the active component 100 and the driven component 200, a strip groove and an annular groove are set on the driven component 200, and when the active component 100 cooperates with the strip groove, the driven component 200 can be driven to rotate, and when the clutch control component 300 adjusts the position of the active component 100 so that it cooperates with the annular groove, the active component 100 and the driven component 200 are connected by sliding, and the driven component 200 can be controlled to rotate by external force.

[0051] In this embodiment, a clutch control component 300 is set between the active component 100 and the driven component 200, so that the user can drive the active component 100 and the driven component 200 through the driving mechanism, and then control the locking mechanism connected to the driven component 200 to lock or unlock the position of all the supporting leg components, or disconnect the connection between the active component 100 and the driven component 200 by controlling the clutch control component 300 on a certain supporting leg component, so that the user can directly control the locking mechanism through the driven component 200 to complete the position locking or unlocking of the supporting leg component alone, which is convenient for adjusting the length of the supporting leg assembly, so that the photography support stand can adapt to more complex installation environments and improve the installation efficiency of the photography support stand.

[0052] like Figure 2 As shown, in some embodiments, the clutch control assembly 300 includes a clamping member 310 and a control component 320, and the clamping member 310 is used to engage or separate the active component 100 and the driven component 200;

[0053] The control component 320 is arranged between the clamping component 310 and the active component 100, and is used to drive the clamping component 310 and the active component 100 to move relative to each other under the action of external force, so as to separate the clamping component 310 from the active component 100; or, the control component 320 is arranged between the clamping component 310 and the driven component 200, and is used to drive the clamping component 310 and the driven component 200 to move relative to each other under the action of external force, so as to separate the clamping component 310 from the driven component 200.

[0054] When the clutch is in the engaged state, the snap-in component 310 is engaged with the active component 100 and the driven component 200 at the same time. The movement of the active component 100 will drive the snap-in component 310 to move, and then drive the driven component 200 to move. At this time, the user can control multiple locking mechanisms through the driving mechanism and complete the position locking or position unlocking of all supporting leg components; if the user needs to adjust a certain supporting leg component separately, the control component 320 is controlled to make the active component 100 or the driven component 200 disengage from the engagement of the snap-in component 310. At this time, the clutch is in the disengaged state, and the active component 100 is separated from the driven component 200.

[0055] Specifically, when the manipulation component 320 is disposed between the clamping component 310 and the active component 100, the manipulation component 320 can make the active component 100 rise or the clamping component 310 fall so that the two are out of engagement; when the manipulation component 320 is disposed between the clamping component 310 and the driven component 200, the manipulation component 320 can make the two out of engagement by raising the clamping component 310 or lowering the driven component 200.

[0056] By providing the clamping member 310 and the operating component 320 , the user only needs to control the operating component 320 to switch between the clutch engagement state and the clutch disengagement state. The operation is simple and the use threshold is low, which can improve the user experience.

[0057] like Figure 2-Figure 5 As shown, in some embodiments, the clamping member 310 is configured with a limiting column 311, the active component 100 is configured with a first limiting groove 110, and the driven component 200 is configured with a second limiting groove 210;

[0058] The operating component 320 can move between an engaged position and a disengaged position. When the operating component 320 is in the engaged position, the two ends of the limiting column 311 are respectively engaged with the first limiting groove 110 and the second limiting groove 210; when the operating component 320 is in the disengaged position, the limiting column 311 is engaged with one of the first limiting groove 110 and the second limiting groove 210 and is separated from the other.

[0059] Through the cooperation between the limit column 311 and the first limit groove 110 and the second limit groove 210, the active component 100 can drive the driven component 200 to move when it moves. When the control component 320 moves to the disconnected position, at least one of the first limit groove 110 and the second limit groove 210 is separated from the limit column 311 (depending on the setting position of the control component 320), which is convenient for the user to control the locking and releasing component 500 by himself.

[0060] It is understandable that the present invention does not limit the number of the limiting posts 311, and only one limiting post 311 may be provided, and the active component 100 or the driven component 200 may be provided with a first limiting groove 110 or a second limiting groove 210 corresponding to the limiting post 311. Multiple limiting posts 311 may also be provided to improve the stability of the connection between the clamping member 310 and the active component 100 and the driven component 200. Furthermore, multiple limiting posts 311 may be evenly arranged around the edge of the clamping member 310 to facilitate the installation of the clutch.

[0061] like Figure 5 and Figure 6 As shown, in some embodiments, at least one protrusion 321 is provided on the manipulation component 320, and at least one groove 312 is provided on the clamping member 310 corresponding to the protrusion 321, and the groove 312 is configured with a guide surface for guiding the protrusion 321 to move along the guide surface;

[0062] When the manipulation component 320 is located at the engaging position, the protrusion 321 is engaged with the groove 312 ; when the manipulation component 320 is located at the disengaging position, the protrusion 321 is separated from the groove 312 .

[0063] The groove 312 can accommodate the protrusion 321, so that the clamping member 310 and the control member 320 can be stably clamped together, and it is not easy to move relative to each other, which will cause an accidental connection between the active member 100 and the driven member 200 and the clamping member 310. The guide surface on the groove 312 plays the role of guiding and positioning the protrusion 321, which can not only facilitate installation, but also make the movement of the control member 320 between the engagement position and the disengagement position smoother, ensuring that the user can use the clutch more easily.

[0064] The guide surface can be an inclined surface or a curved surface, and the present invention does not limit this. Furthermore, a corresponding structure can be provided at the position of the control component 320 corresponding to the guide surface. For example, when the guide surface is an inclined surface, a matching inclined surface is also provided on the control component 320, so that the movement of the control component 320 is more convenient, further improving the user experience.

[0065] like Figure 4 As shown, in some embodiments, the driven component 200 is configured with a cavity 220 , the active component 100 and the clutch control assembly 300 are both accommodated in the cavity 220 , and the second limiting groove 210 is disposed on the inner wall of the driven component 200 .

[0066] The concave cavity 220 can accommodate the active component 100 and the clutch control assembly 300, so that the active component 100 and the clutch control assembly 300 can be accurately embedded therein and closely cooperate with the driven component 200 to achieve more reliable connection and transmission, and also provide protection and fixation to reduce movement or shaking during operation and prevent them from being affected or disturbed by the external environment, thereby improving the stability and reliability of the clutch.

[0067] The shape of the cavity 220 can be set as needed. For example, in this embodiment, the active component 100, the driven component 200 and the clutch control assembly 300 are all cylindrical, so the cavity 220 is set to be cylindrical, so that the cooperation of each component is tighter. The cavity 220 can also be other shapes, and the utility model does not limit this.

[0068] like Figure 1 and Figure 2 As shown, in some embodiments, the driven component 200 further includes a cover plate 230 covering the opening of the cavity 220 , and the cover plate 230 is configured with a through hole 231 , and the driving assembly can be connected to the active component 100 through the through hole 231 .

[0069] The cover plate 230 can close the opening of the cavity 220, thereby protecting the active component 100 and the clutch control assembly 300 in the cavity 220 and reducing the possibility of being affected by the external environment. At the same time, since the clutch control assembly 300 will exert a certain vertical pressure on the active component 100 when moving between the engagement position and the disengagement position, the cover plate 230 is provided to prevent the active component 100 from falling out of the clutch.

[0070] The through hole 231 provided on the cover plate 230 is used to facilitate the connection between the driving assembly and the active component 100. Exemplarily, in one embodiment, the active component 100 is configured with a protruding mounting post, which can extend through the through hole 231 to connect with the driving assembly, making the installation between the driving assembly and the active component 100 more convenient.

[0071] In some embodiments, the clutch control assembly 300 further includes a first elastic member, which is disposed between the clamping member 310 and the driven member 200, and / or,

[0072] The clutch mechanism further includes a second elastic member, which is disposed between the active component 100 and the cover plate 230 .

[0073] When only the first elastic member is provided, the operating member 320 is rotated to make the protrusion 321 rotate out of the groove 312. At this time, the operating member 320 presses the clamping member 310 downward and makes the clamping member 310 drop, thereby causing the clamping member 310 to separate from the active component 100. When only the second elastic member is provided, the operating member 320 is rotated to make the protrusion 321 rotate out of the groove 312. At this time, the operating member 320 presses the active component 100 upward and makes the active component 100 rise, thereby causing the clamping member 310 to separate from the active component 100. When the first elastic member and the second elastic member are provided at the same time, it is similar to this and will not be described in detail here. It should be noted that when the operating member 320 is provided between the clamping member 310 and the driven component 200, only the first elastic member can be provided.

[0074] By providing the first elastic member and / or the second elastic member, the impact between the various components can be reduced to avoid easy damage, and when the user controls the control component 320 to move between the engaged position and the disengaged position, the active component 100 or the clamping component 310 can also move and reset accordingly, thereby reducing the difficulty of operation.

[0075] like Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the active component 100 is configured with a mounting hole 111, the drive assembly includes at least one drive rod 400, and the mounting hole 111 is used to cooperate with the drive assembly so that the movement of the drive assembly can be transmitted to the active component 100; and / or,

[0076] The driven component 200 is configured with a connecting column 240 , and the connecting column 240 is configured with two sections of threads with opposite rotation directions. The locking and releasing assembly 500 is threadedly connected to the connecting column 240 .

[0077] The mounting hole 111 may be a through hole 231 or a blind hole. Through the connection between the driving rod 400 and the mounting hole 111, the effect of the driving component transmitting the motion to the active component 100 can be achieved.

[0078] Exemplarily, the locking and releasing assembly 500 may include two connecting parts, which are respectively threadedly connected to the threads at both ends. At this time, when the driven component 200 rotates, it can drive the two connecting parts to approach each other. By setting a suitable clamping structure on the connecting parts, the supporting leg assembly can be locked.

[0079] The utility model further proposes a supporting foot assembly for use in a photographic support frame, comprising: a fixed seat; a fixed rod, one end of which is connected to the fixed seat; a movable rod, which is movably connected to the fixed rod; a locking and releasing assembly 500, which is connected between the fixed rod and the movable rod and is used to lock the movable rod and the fixed rod to prevent the movable rod from moving relative to the fixed rod, and to unlock the movable rod and the fixed rod to allow the movable rod to move relative to the fixed rod; a driving assembly, which includes a driving rod 400, which is connected to the locking and releasing assembly 500 to drive the locking and releasing assembly 500 to lock or release the movable rod and the fixed rod; and a clutch, through which the fixed rod is connected to the locking and releasing assembly 500.

[0080] The specific structure of the clutch refers to the above embodiments. Since the support foot assembly adopts all the technical solutions of all the above embodiments, it at least has all the technical effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0081] The utility model further proposes a photographic support frame, comprising a support base and at least two support leg assemblies in the aforementioned embodiments, wherein the support base is connected to the fixing bases of the at least two support leg assemblies for connecting a photographic device.

[0082] The above description is only a partial or preferred embodiment of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A clutch, used in a support leg assembly of a photographic support frame to engage or disengage a drive assembly and a lock-release assembly; characterized in that: include: An active component, used to be connected to the driving assembly so as to move under the drive of the driving assembly; A driven component, used to be connected to the locking and releasing assembly to drive the locking and releasing assembly to move; A clutch control component, wherein the clutch control component is movably disposed between the active component and the driven component; The clutch control assembly is used to engage the active component and the driven component to allow the active component to drive the driven component and the lock-release assembly to move under the drive of the drive assembly; The clutch control assembly is used to separate the active component and the driven component to prevent the active component from driving the driven component and the locking and releasing component to move under the drive of the driving component.

2. The clutch according to claim 1, characterized in that: The clutch control assembly includes a clamping member and a control component, wherein the clamping member is used to engage or separate the active member and the driven member; The control component is arranged between the clamping component and the active component, and is used to drive the clamping component and the active component to move relative to each other under the action of external force, so that the clamping component is separated from the active component; or, the control component is arranged between the clamping component and the driven component, and is used to drive the clamping component and the driven component to move relative to each other under the action of external force, so that the clamping component is separated from the driven component.

3. The clutch according to claim 2, characterized in that: The clamping member is configured with a limiting column, the active member is configured with a first limiting groove, and the driven member is configured with a second limiting groove; The operating component can move between an engaged position and a disengaged position. When the operating component is in the engaged position, both ends of the limit column are respectively engaged with the first limit groove and the second limit groove; when the operating component is in the disengaged position, the limit column is engaged with one of the first limit groove and the second limit groove and is separated from the other.

4. The clutch according to claim 3, characterized in that: The control component is provided with at least one protrusion, and the clamping member is provided with at least one groove corresponding to the protrusion, and the groove is configured with a guide surface for guiding the protrusion to move along the guide surface; When the operating component is located at the engaging position, the protrusion is engaged with the groove; when the operating component is located at the disengaging position, the protrusion is separated from the groove.

5. The clutch according to claim 4, characterized in that: The driven component is configured with a concave cavity, the active component and the clutch control assembly are both accommodated in the concave cavity, and the second limiting groove is arranged on the inner wall of the driven component.

6. The clutch according to claim 5, characterized in that: The driven component further comprises a cover plate covering the opening of the cavity, wherein the cover plate is provided with a through hole, and the driving assembly can be connected to the active component through the through hole.

7. The clutch according to claim 6, characterized in that: The clutch control assembly further includes a first elastic member, wherein the first elastic member is arranged between the clamping member and the driven member, and / or, The clutch control assembly further includes a second elastic member, and the second elastic member is arranged between the active component and the cover plate.

8. The clutch according to claim 1, characterized in that: The active component is configured with a mounting hole, the drive assembly includes at least one drive rod, the mounting hole is used to cooperate with the drive assembly so that the movement of the drive assembly can be transmitted to the active component; and / or, The driven component is configured with a connecting column, the connecting column is configured with two sections of threads with opposite rotation directions, and the locking and releasing assembly is threadedly connected to the connecting column.

9. A support foot assembly, used in a photographic support frame, characterized in that: include: Fixed seat; A fixing rod, one end of which is connected to the fixing seat; A movable rod, the movable rod being movably connected to the fixed rod; a locking assembly connected between the fixed rod and the movable rod, for locking the movable rod and the fixed rod to prevent the movable rod from moving relative to the fixed rod, and for unlocking the movable rod and the fixed rod to allow the movable rod to move relative to the fixed rod; A driving assembly, the driving assembly comprising a driving rod, the driving rod being connected to the locking and releasing assembly to drive the locking and releasing assembly to lock or release the movable rod and the fixed rod; The clutch according to any one of claims 1 to 8, wherein the fixing rod is connected to the locking and releasing assembly through the clutch.

10. A photography support frame, characterized in that: It comprises a support base and at least two support leg assemblies as claimed in claim 9, wherein the support base is connected to the fixing bases of the at least two support leg assemblies for connecting a photographic device.

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