CN219263668U - Tripod head locking device and tripod head - Google Patents

Abstract

The application relates to a cloud platform locking means and cloud platform, cloud platform locking means includes frame, pivot and locking subassembly, wherein: the rotating shaft is rotatably arranged on the frame, and the end part of the rotating shaft is provided with a matching part; the locking component comprises a sleeve and a sliding part which is in sliding fit along the axial direction of the sleeve, a locking part which is in plug fit with the matching part is arranged on the sliding part, and the sleeve is fixedly arranged at one end of the frame, which is close to the rotating shaft and provided with the matching part; the rotating shaft has a rotating state and a locking state, in the rotating state, the sliding piece is driven to slide towards a direction away from the rotating shaft so as to separate the matching part from the locking part; in the locking state, the sliding piece is driven to slide towards the direction close to the rotating shaft so as to plug the locking part into the matching part. Under the locking state, the rotating shaft can not rotate under the action of load to cause accidents, and the cradle head locking device is simple in structure and can ensure the stability and reliability of the locking assembly under the locking state.

Description

Tripod head locking device and tripod head

Technical Field

The application relates to the field of holders, in particular to a holder locking device and a holder.

Background

The cradle head is used as common equipment for fixing and supporting a camera so as to drive the camera to rotate at all angles for shooting, realize the function of omnibearing monitoring and be widely applied to the field of cameras.

However, when the cradle head is in use and in case of power failure, the cradle head can still rotate due to the load action on the cradle head rotating shaft, so that the camera can continue to move and even collide with other devices.

The locking structure of the existing cradle head mainly depends on a complex circuit to realize automatic locking, but can only realize manual locking when power is off. The manual locking is easy to forget by a user, so that the conventional holder locking device is complex in structure and unreliable.

Disclosure of Invention

Accordingly, there is a need for a holder lock device that has a simple structure and is stable and reliable in a locked state, and a holder.

Specifically, the present utility model firstly provides a tripod head locking device, which comprises: a frame; the rotating shaft is rotatably arranged on the rack, and the end part of the rotating shaft is provided with a matching part; the locking assembly comprises a sleeve and a sliding part which is in sliding fit along the axial direction of the sleeve, a locking part which is in plug fit with the matching part is arranged on the sliding part, and the sleeve is fixedly arranged at one end of the frame, which is close to the rotating shaft and is provided with the matching part; the rotating shaft has a rotating state in which the slider is driven to slide in a direction away from the rotating shaft to separate the engaging portion from the lock portion; in the locking state, the sliding piece is driven to slide towards the direction close to the rotating shaft so as to plug the locking part into the matching part.

In the cradle head locking device, when the cradle head is required to be adjusted through rotation of the rotating shaft, the control sliding piece is driven to slide towards the direction away from the rotating shaft, the matching part is separated from the locking part, and at the moment, the rotating shaft is not limited and can rotate freely relative to the frame; when the cradle head does not need to be regulated, the control sliding piece is driven to slide towards the direction close to the rotating shaft, the lock part is inserted into the matching part, and at the moment, the rotating shaft cannot rotate relative to the frame; under the locking state, the rotating shaft can not rotate under the action of load to cause accidents, and the cradle head locking device is simple in structure and can ensure the stability and reliability of the locking assembly under the locking state.

In one embodiment, the engaging portion is one of a limiting hole and a protruding column, the locking portion is the other of the limiting hole and the protruding column, and the limiting hole is in plug-in engagement with the protruding column.

So set up, spacing hole and projection grafting complex simple structure are convenient for production and assembly.

In one embodiment, the end of the rotating shaft is provided with a plurality of limiting holes, the limiting holes are uniformly distributed along the circumferential direction of the rotating shaft, the sliding piece is provided with at least one convex column, and one convex column is correspondingly inserted into one limiting hole.

So set up, when the pivot rotated to different angles, the projection can all peg graft to in the spacing hole that corresponds rather than the position to fixed cloud platform in a plurality of angles.

In one embodiment, the minimum distance between two adjacent limiting holes is L, and L is more than or equal to 0mm and less than or equal to 0.5mm.

So set up, the pivot only need rotate a less angle, and the projection just can be followed the spacing hole of pegging graft before and changed to peg graft to in the spacing hole adjacent before to improve the regulation precision of cloud platform.

In one embodiment, the plurality of the protruding columns are uniformly distributed along the circumference of the end part of the sliding piece.

So set up, when one of them projection is pegged graft to one of them spacing downthehole, other projections also can peg graft respectively to corresponding spacing downthehole.

In one embodiment, the limiting hole is provided with a flaring section and a limiting section which is smoothly connected with the flaring section, and the diameter of the flaring section is larger than that of the limiting section.

The limiting section is used for limiting the convex column to move along the circumferential direction of the rotating shaft in the limiting hole; the flaring segment can play a role in guiding the convex column, and even if the convex column is not completely aligned with the limiting hole, the flaring segment can drive the rotating shaft to rotate by a small angle so as to align the convex column with the limiting hole.

In one embodiment, at least one sliding rail is convexly arranged on the side wall of the sliding piece, a sliding groove which is slidably connected with the sliding rail is arranged on the inner wall of the sleeve, and the sliding rail is arranged along the axial direction of the sliding piece.

So set up, slide rail and spout sliding fit are in order to restrict the slip direction of slider, guarantee that the slider slides along the axial of pivot all the time.

In one embodiment, the device further comprises a coupling assembly, wherein the coupling assembly is connected with the sliding piece and generates a coupling force for driving the sliding piece to slide towards or away from the rotating shaft.

So set up, the coupling assembly is used for driving the slider to slide along the axial of pivot in the sleeve.

In one embodiment, the coupling assembly comprises a permanent magnet part and an electromagnet with coupling force for producing the permanent magnet part, the permanent magnet part is fixedly arranged on the rotating shaft, an assembly groove is formed in the sliding part, the electromagnet is fixedly arranged in the assembly groove, and the sliding part is an iron part.

So set up, only need control the electro-magnet circular telegram when needs regulation cloud platform, just be difficult to appear the user and forget the condition of circular telegram, when the electro-magnet was in the outage state, lock portion peg graft in cooperation portion all the time, and the pivot can't rotate for the frame to can guarantee the reliability of this cloud platform locking device.

In one embodiment, the holder locking device further includes a first pressing plate, and the first pressing plate presses the permanent magnet piece to the rotating shaft in a pressing manner; and/or the holder locking device further comprises a second pressing plate, and the second pressing plate is fixedly arranged at one end of the sleeve, which is away from the rack.

The first pressing plate is used for fixing the permanent magnet piece, so that the permanent magnet piece is prevented from falling out of the rotating shaft under the action of the adsorption force between the electromagnet and the permanent magnet piece or the adsorption force between the permanent magnet piece and the sliding piece; the second pressing plate can prevent the sliding piece from sliding to the side far away from the rotating shaft under the repulsive force between the electromagnet and the permanent magnet piece to be separated from the sleeve.

In one embodiment, a bearing is arranged on the rotating shaft, and the rotating shaft is rotatably connected with the frame through the bearing.

So set up, the bearing is used for supporting the pivot, reduces the coefficient of friction of pivot in the motion process to guarantee the gyration precision of pivot.

The utility model also provides a holder, comprising the holder locking device.

Drawings

In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings that are required to be used in the description of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic diagram of an explosion structure of a holder locking device according to the present utility model;

FIG. 2 is an enlarged schematic view of the structure shown at A in FIG. 1;

FIG. 3 is an enlarged schematic view of the structure at B in FIG. 1;

FIG. 4 is a schematic perspective view of the rotating shaft in FIG. 1;

FIG. 5 is a schematic perspective view of the slider of FIG. 1;

FIG. 6 is a schematic view of the slider and sleeve of FIG. 1 mated together;

fig. 7 is a schematic view showing the structure of the rotation shaft in the above embodiment;

FIG. 8 is an enlarged schematic view of FIG. 7 at C;

fig. 9 is a schematic view showing the structure of the rotation shaft in the locked state in the above embodiment.

Reference numerals: 10. a frame; 11. a through hole; 20. a rotating shaft; 21. a mating portion; 211. a limiting hole; 2111. a flaring section; 2112. a limiting section; 22. a bearing; 23. a receiving groove; 30. a locking assembly; 31. a sleeve; 311. a chute; 32. a slider; 321. a lock part; 3211. a convex column; 322. a slide rail; 323. an assembly groove; 40. a coupling assembly; 41. a permanent magnet piece; 42. an electromagnet; 50. a first platen; 60. and a second pressing plate.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used in the description of the present application for purposes of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact of the first feature with the second feature, or an indirect contact of the first feature with the second feature via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

Unless defined otherwise, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The term "and/or" as used in the specification of this application includes any and all combinations of one or more of the associated listed items.

When the cradle head is in use and in case of power failure, the cradle head can still rotate due to the load action on the cradle head rotating shaft, so that the camera can continue to move and even collide with other devices. The locking structure of the existing holder mainly depends on a complex circuit to realize automatic locking, for example, when the electromagnet is electrified, the iron block and the friction element are separated from the rotating shaft, the rotating shaft can rotate, when the electromagnet is in power failure, the iron block and the friction element are in contact with the rotating shaft, and the rotating shaft is limited to rotate by virtue of friction force between the friction element and the rotating shaft. However, this structure has a small load bearing capacity and poor reliability, and the friction element affects the locking ability after a long period of use, so that it is also necessary to replace the worn friction element periodically. Moreover, the structure still can only be locked manually when the power is off, and the manual locking is easy to forget by a user, so that the structure of the conventional holder locking device is complex and unreliable.

In order to solve the above-mentioned problems, as shown in fig. 1 to 8, the present utility model firstly provides a holder locking device, which has a simple structure and is stable and reliable in a locked state.

As shown in fig. 1 and 7, specifically, the pan-tilt locking device includes a frame 10, a rotating shaft 20, and a locking assembly 30, wherein: the rotating shaft 20 is rotatably arranged on the frame 10, and the end part of the rotating shaft 20 is provided with a matching part 21; the locking assembly 30 comprises a sleeve 31 and a sliding part 32 which is in sliding fit along the axial direction of the sleeve 31, a locking part 321 which is in plug fit with the matching part 21 is arranged on the sliding part 32, and the sleeve 31 is fixedly arranged at one end of the frame 10, which is close to the rotating shaft 20 and provided with the matching part 21; the rotation shaft 20 has a rotation state in which the slider 32 is driven to slide in a direction away from the rotation shaft 20 to separate the engaging portion 21 from the lock portion 321; in the locked state, the slider 32 is driven to slide in a direction approaching the rotation shaft 20 to insert the lock portion 321 into the mating portion 21.

According to the cradle head locking device provided by the utility model, when the cradle head is required to be adjusted by rotating the rotating shaft 20, the control sliding piece 32 is driven to slide towards the direction away from the rotating shaft 20, the matching part 21 is separated from the locking part 321, and at the moment, the rotating shaft 20 is not limited and can rotate freely relative to the frame 10; when the pan/tilt is not required to be adjusted, the control slider 32 is driven to slide in a direction approaching the rotating shaft 20, and the lock portion 321 is inserted into the mating portion 21, so that the rotating shaft 20 cannot rotate relative to the frame 10. In this way, in the locked state, the rotating shaft 20 will not rotate under load and accident occurs, the structure of the tripod head locking device is simple, and the locking capability of the locking assembly 30 will not be affected due to abrasion generated between the matching part 21 and the locking part 321, so that the stability and reliability of the locking assembly 30 in the locked state can be ensured.

The frame 10 includes a through hole 11, a bearing 22 is disposed on a rotating shaft 20, and the rotating shaft 20 is rotatably connected with the through hole 11 of the frame 10 through the bearing 22. The bearing 22 is used for supporting the rotating shaft 20, reducing the friction coefficient of the rotating shaft 20 during the movement process, and ensuring the rotation precision of the rotating shaft 20. While the bearing 22 can also be used to limit axial sliding of the shaft 20. The sleeve 31 may be fixed to the end of the frame 10 near the rotating shaft 20, where the mating portion 21 is provided, by means of screws, glue, snap, or the like.

As shown in fig. 2 to 3, the engaging portion 21 is one of a limiting hole 211 and a protruding post 3211, the locking portion 321 is the other of the limiting hole 211 and the protruding post 3211, and the limiting hole 211 is in plug-in engagement with the protruding post 3211. The limit holes 211 and the convex columns 3211 are in plug-in fit, so that the structure is simple and the production and the assembly are convenient.

As shown in fig. 4 to 5, in the illustrated embodiment, a plurality of limiting holes 211 are formed at the end of the rotating shaft 20, the limiting holes 211 are uniformly distributed along the circumferential direction of the rotating shaft 20, at least one protruding post 3211 is disposed on the sliding member 32, and one protruding post 3211 is correspondingly inserted into one limiting hole 211. Thus, when the rotating shaft 20 rotates to different angles, the protruding columns 3211 can be inserted into the limiting holes 211 corresponding to the positions of the protruding columns so as to fix the holder at a plurality of angles. In another embodiment, at least one boss 3211 may be provided at an end of the rotating shaft 20, and a plurality of limiting holes 211 may be provided in the slider 32, where the limiting holes 211 are uniformly distributed along the circumferential direction of the rotating shaft 20.

In other embodiments, the limiting hole 211, the boss 3211 and the rotating shaft 20 may be provided, the inner wall of the limiting hole 211 may be a regular polygon or a tooth-shaped structure, the outer wall of the boss 3211 may be a regular polygon or a tooth-shaped structure corresponding to the inner wall of the limiting hole 211, and when the boss 3211 is inserted into the limiting hole 211, the boss 3211 and the limiting hole 211 cannot rotate relative to each other, and the rotating shaft 20 cannot rotate relative to the frame 10.

As shown in fig. 5, the plurality of the projections 3211 is provided, and the plurality of projections 3211 are uniformly distributed along the circumferential direction of the end of the slider 32. So that when one of the protruding columns 3211 is inserted into one of the limiting holes 211, the remaining protruding columns 3211 can also be inserted into the corresponding limiting hole 211. The number of the protruding columns 3211 is smaller than or equal to the number of the limiting holes 211, for example, the number of the protruding columns 3211 may be set to 1, 2, 3, 4 or more, and 4 protruding columns 3211,4 protruding columns 3211 are provided in the illustrated embodiment, so that it is possible to avoid causing difficulty in production and assembly while ensuring reliability of the fitting between the fitting portion 21 and the locking portion 321.

As shown in FIGS. 2 and 4, the minimum distance between two adjacent limiting holes 211 is L, which satisfies 0 mm.ltoreq.L.ltoreq.0.5 mm. The minimum distance L between two adjacent limiting holes 211 is the minimum distance between the outer edges of the two limiting holes 211, and when l=0, the outer edges of the two limiting holes 211 are tangent. When L is more than or equal to 0mm and less than or equal to 0.5mm, the rotating shaft 20 only needs to rotate by a small angle, and the convex columns 3211 can be converted from the previous inserted limiting holes 211 to the previous adjacent limiting holes 211, so that the adjusting precision of the cradle head is improved.

As shown in fig. 2 and 4, the limiting hole 211 has a flared section 2111 and a limiting section 2112 smoothly connected to the flared section 2111, and the diameter of the flared section 2111 is larger than the diameter of the limiting section 2112. The inner diameter of the limiting segment 2112 is equal to or slightly greater than the outer diameter of the boss 3211 to limit the movement of the boss 3211 within the limiting hole 211 in the circumferential direction of the rotating shaft 20, thereby limiting the rotation of the rotating shaft 20 relative to the frame 10. The flaring segment 2111 can play a guiding role on the boss 3211, even if the boss 3211 is not completely aligned with the limiting holes 211, i.e. the axis of the boss 3211 is not coincident with the axis of any one of the limiting holes 211, the rotating shaft 20 can be driven to rotate by a smaller angle under the action of the flaring segment 2111, so that the boss 3211 is aligned with the limiting holes 211, i.e. the axis of the boss 3211 is coincident with the axis of one of the limiting holes 211.

As shown in fig. 3 and 6, at least one sliding rail 322 is convexly arranged on the side wall of the sliding member 32, a sliding groove 311 which is slidably connected with the sliding rail 322 is arranged on the inner wall of the sleeve 31, and the sliding rail 322 is arranged along the axial direction of the sliding member 32. The sliding rail 322 is slidably matched with the sliding groove 311 to limit the sliding direction of the sliding piece 32, so as to ensure that the sliding piece 32 always slides along the axial direction of the rotating shaft 20. In the illustrated embodiment, the number of the sliding rails 322 is 4, and the 4 sliding rails are arranged at intervals along the circumferential direction of the rotating shaft 20 to form a spline structure, and the number and positions of the sliding grooves 311 are arranged corresponding to those of the sliding rails 322. In other embodiments, the number of the sliding rails 322 may be 1, 2, 3 or more, and the sliding fit of the sliding rails 322 and the sliding grooves 311 can improve the stability of the sliding member 32 during sliding, so as to avoid the situation that the sliding member 32 tilts or shakes along the circumferential direction of the rotating shaft 20, which results in the failure of the protruding columns 3211 to correspond to the limiting holes 211.

As shown in fig. 7 to 9, the coupling assembly 40 is further included, and the coupling assembly 40 is connected with the slider 32 and generates a coupling force that drives the slider 32 to slide toward or away from the rotation shaft 20. The coupling assembly 40 is used for driving the sliding member 32 to slide in the sleeve 31 along the axial direction of the rotating shaft 20.

In the illustrated embodiment, the coupling assembly 40 includes a permanent magnet 41 and an electromagnet 42 for producing coupling force with the permanent magnet 41, the rotating shaft 20 is provided with a receiving groove 23, the permanent magnet 41 is fixedly arranged in the receiving groove 23 of the rotating shaft 20, the sliding member 32 is provided with an assembling groove 323, the electromagnet 42 is fixedly arranged in the assembling groove 323, and the sliding member 32 is an iron member. Wherein, the iron piece is an element which contains iron, cobalt and nickel and can be adsorbed by a magnet. The fitting groove 323 and the receiving groove 23 are used to fix the electromagnet 42 and the permanent magnet 41, respectively. And the whole volume of the holder locking device can be reduced, and the axial dimension of the holder locking device is prevented from being overlarge because the electromagnet 42 protrudes out of the sliding part 32 and the permanent magnet part 41 protrudes out of the rotating shaft 20. Of course, the permanent magnet 41 may be directly fixed to the rotary shaft 20 or the electromagnet 42 may be directly fixed to the slider 32, as required, without providing the fitting groove 323 and the accommodating groove 23.

As shown in fig. 7 to 8, when the pan-tilt needs to be adjusted by rotating the rotating shaft 20, the electromagnet 42 is controlled to be energized, at this time, the magnetic poles of the electromagnet 42 and the permanent magnet piece 41 are the same, and a repulsive force is generated between the electromagnet 42 and the permanent magnet piece 41, and since the permanent magnet piece 41 is fixed to the rotating shaft 20 and the rotating shaft 20 cannot slide relatively in the axial direction relative to the frame 10, the electromagnet 42 and the sliding piece 32 can be driven to slide in the direction away from the rotating shaft 20 by the repulsive force, the engaging portion 21 is separated from the locking portion 321, and the rotating shaft 20 is not limited and can rotate freely relative to the frame 10. As shown in fig. 9, when the pan/tilt is not required to be adjusted, the electromagnet 42 is controlled to be powered off, and at this time, the repulsive force between the electromagnet 42 and the permanent magnet 41 is eliminated, and the slider 32 is made of iron and can be attracted by the permanent magnet 41, so that the electromagnet 42 and the slider 32 can be driven to slide in a direction approaching the rotating shaft 20 by the attraction force, the lock portion 321 is inserted into the mating portion 21, and the rotating shaft 20 cannot rotate relative to the frame 10.

Therefore, the electromagnet 42 is only required to be controlled to be electrified when the holder needs to be adjusted, the situation that a user forgets to electrify is not easy to occur, when the electromagnet 42 is in a power-off state, the lock portion 321 is always inserted into the matching portion 21, the rotating shaft 20 cannot rotate relative to the rack 10, and accordingly reliability of the holder locking device can be guaranteed. In addition, since the magnetic poles are different when the current direction in the electromagnet 42 is different, the electromagnet 42 can be electrified with reverse current, so that the magnetic poles of the electromagnet 42 and the permanent magnet piece 41 are opposite, an adsorption force is generated between the electromagnet 42 and the permanent magnet piece 41, and only when the external force applied to the sliding piece 32 and facing the side far away from the rotating shaft 20 is greater than the sum of the adsorption force between the permanent magnet piece 41 and the sliding piece 32 and the adsorption force between the permanent magnet piece 41 and the electromagnet 42, the locking part 321 and the matching part 21 can be accidentally separated, thereby realizing the auxiliary anti-vibration function, further improving the reliability of the cradle head locking device and avoiding the influence of the external force.

In other embodiments, the electromagnet 42 may be fixed to the shaft 20, the permanent magnet 41 may be fixed to the slider 32, and the elastic member may be provided between the slider 32 and the sleeve 31. When the electromagnet 42 is energized, a repulsive force is generated between the electromagnet 42 and the permanent magnet 41, the permanent magnet 41 and the sliding member 32 can be driven to slide in a direction away from the rotating shaft 20 by the repulsive force, the elastic member is deformed, for example, compressed or stretched, and the lock portion 321 is separated from the mating portion 21. When the electromagnet 42 is powered off, the repulsive force between the electromagnet 42 and the permanent magnet 41 disappears, and the permanent magnet 41 and the slider 32 can be driven to slide in the direction approaching the rotating shaft 20 under the action of the elastic force of the elastic member, and the lock portion 321 is inserted into the mating portion 21.

As shown in fig. 1 to 2, the holder locking device further includes a first pressing plate 50, where the first pressing plate 50 presses the permanent magnet piece 41 against the rotating shaft 20. The first pressing plate 50 can be fixed on the rotating shaft 20 by means of screws, adhesion, buckling and the like, so that the permanent magnet piece 41 is always fixed in the accommodating groove 23, and the permanent magnet piece 41 is prevented from falling out of the rotating shaft 20 under the action of the adsorption force between the electromagnet 42 and the permanent magnet piece 41 or the adsorption force between the permanent magnet piece 41 and the sliding piece 32, so that the stability and the reliability of connection between the permanent magnet piece 41 and the rotating shaft 20 are ensured. Of course, the permanent magnet 41 may be directly fixed to the shaft by screws, adhesion, or fastening.

As shown in fig. 1 and 3, the holder locking device further includes a second pressing plate 60, where the second pressing plate 60 is fixedly disposed at one end of the sleeve 31 facing away from the frame 10. The second pressing plate 60 may be fixed to the sleeve 31 by means of screws, glue, buckles, etc., so as to prevent the sliding member 32 from sliding out of the sleeve 31 toward a side away from the rotating shaft 20 under the repulsive force between the electromagnet 42 and the permanent magnet member 41. Of course, the sleeve 31 may be directly provided with a side wall and a bottom wall, and the bottom wall can prevent the slider 32 from coming out of the sleeve 31.

The utility model also provides a holder, comprising the holder locking device. The cradle head can be applied to electronic equipment such as a video camera and the like.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of the present application is to be determined by the following claims.

Claims (12)

1. A tripod head locking device, comprising:

a frame (10);

a rotating shaft (20) rotatably arranged on the frame (10), wherein a matching part (21) is arranged at the end part of the rotating shaft (20); and

the locking assembly (30) comprises a sleeve (31) and a sliding part (32) which is in sliding fit along the axial direction of the sleeve (31), a locking part (321) which is in plug-in fit with the matching part (21) is arranged on the sliding part (32), and the sleeve (31) is fixedly arranged at one end of the frame (10) which is close to the rotating shaft (20) and provided with the matching part (21); the rotating shaft (20) has a rotating state in which the slider (32) is driven to slide in a direction away from the rotating shaft (20) to separate the engaging portion (21) from the lock portion (321); in the locking state, the sliding piece (32) is driven to slide towards the direction approaching the rotating shaft (20) so as to plug the locking part (321) into the matching part (21).

2. The holder locking device according to claim 1, wherein the engaging portion (21) is one of a limiting hole (211) or a boss (3211), the locking portion (321) is the other one of the limiting hole (211) or the boss (3211), and the limiting hole (211) is in plug-in engagement with the boss (3211).

3. The holder locking device according to claim 2, wherein a plurality of limiting holes (211) are formed in an end portion of the rotating shaft (20), the limiting holes (211) are uniformly distributed along a circumferential direction of the rotating shaft (20), at least one protruding column (3211) is arranged on the sliding piece (32), and one protruding column (3211) is correspondingly inserted into one limiting hole (211).

4. A holder locking device according to claim 3, wherein the minimum distance between two adjacent limiting holes (211) is L, satisfying 0mm +.l +.0.5 mm.

5. A holder lock device according to claim 3, wherein the number of the protruding columns (3211) is plural, and the plurality of protruding columns (3211) are uniformly distributed along the circumferential direction of the end portion of the slider (32).

6. A holder lock-up device according to claim 3, wherein the limiting hole (211) has a flared section (2111) and a limiting section (2112) smoothly connected to the flared section (2111), the flared section (2111) having a diameter larger than the diameter of the limiting section (2112).

7. The holder locking device according to claim 1, wherein at least one sliding rail (322) is convexly arranged on a side wall of the sliding member (32), a sliding groove (311) which is slidably connected with the sliding rail (322) is arranged on an inner wall of the sleeve (31), and the sliding rail (322) is arranged along an axial direction of the sliding member (32).

8. The pan-tilt locking device according to claim 1, further comprising a coupling assembly (40), the coupling assembly (40) being connected to the slider (32) and generating a coupling force that drives the slider (32) to slide in a direction toward or away from the rotation shaft (20).

9. The holder locking device according to claim 8, wherein the coupling assembly (40) comprises a permanent magnet piece (41) and an electromagnet (42) with a production coupling force with the permanent magnet piece (41), the permanent magnet piece (41) is fixedly arranged on the rotating shaft (20), an assembly groove (323) is formed in the sliding piece (32), the electromagnet (42) is fixedly arranged in the assembly groove (323), and the sliding piece (32) is an iron piece.

10. The pan-tilt locking device according to claim 9, further comprising a first pressing plate (50), the first pressing plate (50) pressing the permanent magnet piece (41) against the rotating shaft (20); and/or

The cradle head locking device further comprises a second pressing plate (60), and the second pressing plate (60) is fixedly arranged at one end, deviating from the frame (10), of the sleeve (31).

11. The holder locking device according to claim 1, wherein a bearing (22) is provided on the rotating shaft (20), and the rotating shaft (20) is rotatably connected with the frame (10) through the bearing (22).

12. A pan-tilt comprising a pan-tilt locking device according to any one of claims 1 to 11.

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