CN116615692A

CN116615692A - Focus follower, shooting device and movable platform

Info

Publication number: CN116615692A
Application number: CN202180077051.2A
Authority: CN
Inventors: 周呈科; 邱健达; 耶方明
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2023-08-18
Also published as: WO2022227029A1

Abstract

A focus follower (100) and a movable platform, the focus follower (100) comprises a driving assembly (10), a focus follower gear (20) and a displacement adjusting device (30). The focus following gear (20) is connected with the driving assembly (10) and is used for rotating under the driving of the driving assembly (10). The displacement adjusting device (30) is respectively connected with the driving assembly (10) and the focus following gear (20) and is used for adjusting the relative positions of the driving assembly (10) and the focus following gear (20) so that the focus following gear (20) can move relative to the driving assembly (10). The focus following gear (20) of the focus following device (100) can move independently to adapt to lenses (201) of different shooting devices (200), and when the focus following device is applied to a tripod head camera, the influence on the leveling of the tripod head is small, so that the tripod head leveling is easy, the energy consumption is saved, and the control of the tripod head camera is stable.

Description

Focus follower, shooting device and movable platform

Technical Field

The embodiment of the application relates to the technical field of image pickup, in particular to a focus follower, a shooting device and a movable platform.

Background

When shooting images or videos, the camera device generally needs to adjust the focal length, and the focus follower mainly has the main function of replacing a human hand to rotate a focusing ring on a lens in shooting the videos so as to control the focus of the lens in real time. Compared with the traditional hand-screwed lens, the adjusting mode is more accurate and stable.

For the pan-tilt camera, the lens of the pan-tilt camera needs to be focused, so that a focus follower is required to be provided, but in the related art, the focus follower of the pan-tilt camera moves integrally along the length direction of the lens, so that the integral movement of the focus follower can affect the gravity center position of the whole pan-tilt camera due to the heavy self weight of the focus follower, thereby being not beneficial to the leveling of the pan-tilt and further not beneficial to the control of the pan-tilt.

Disclosure of Invention

Aiming at the defects in the prior art, the embodiment of the application provides a focus follower, a shooting device and a movable platform.

A first aspect of an embodiment of the present application provides a focus follower, including

A drive assembly;

the focus following gear is connected with the driving assembly and used for performing rotary motion under the driving of the driving assembly;

and the displacement adjusting device is respectively connected with the driving assembly and the following coke gear and is used for adjusting the relative positions of the driving assembly and the following coke gear so that the following coke gear can move relative to the driving assembly.

A second aspect of the present application provides a photographing apparatus, including a main body, a lens, and a focus follower, where the focus follower is mounted on the main body, and the focus follower includes:

A drive assembly;

A third aspect of the embodiments of the present application provides a movable platform, including a bearing portion at least for connecting with a photographing device, and a focus follower cooperating with the photographing device, where the focus follower includes:

a drive assembly;

The focus follower, the shooting device and the movable platform provided by the embodiment of the application comprise the focus follower gear which is used for being meshed with a focusing ring of a lens so as to rotate the focusing ring to realize focusing, the focus follower gear is connected with the driving assembly, and the displacement adjusting device is used for adjusting the relative position of the focus follower gear and the driving assembly, so that the focus follower gear can move relative to the driving assembly, therefore, the focus follower gear can be independently moved so as to be suitable for lenses of different shooting devices, and when the focus follower gear is applied to a tripod head camera, the influence on the leveling of the tripod head is small, so that the tripod head leveling is easy, the energy consumption is saved, and the control of the tripod head camera is more stable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

Fig. 1 is a schematic structural diagram of a photographing device with a focus follower according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a focus follower according to an embodiment of the present application;

FIG. 3 is a schematic diagram of an explosion structure of a focus follower according to an embodiment of the present application;

FIG. 4a is a schematic view illustrating a state that a tracking gear of a tracking device approaches a driving assembly according to an embodiment of the present application;

FIG. 4b is a schematic view illustrating a state that a tracking gear of a tracking device is away from a driving assembly according to an embodiment of the present application;

FIG. 4c is a schematic view illustrating a reverse installation of a tracking gear of a tracking device according to an embodiment of the present application;

FIG. 5 is a side view of a focus follower according to one embodiment of the application;

fig. 6 is a schematic structural diagram of a cradle head with a camera according to an embodiment of the present application.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art is able to solve the technical problem within a certain error range, substantially achieving the technical effect.

Furthermore, the term "coupled" as used herein includes any direct or indirect connection. Thus, if a first device couples to a second device, that connection may be through a direct connection, or through an indirect connection via other devices.

It should be understood that the term "and/or" as used herein is merely an association relationship describing associated objects, meaning that three relationships may exist, e.g., A1 and/or B1, may represent: a1 exists alone, while A1 and B1 exist together, and B1 exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

Some embodiments of the present application are described in detail below with reference to the accompanying drawings. Those skilled in the art may combine and combine the features of the different embodiments or examples described in this specification and of the different embodiments or examples without contradiction.

The focus follower replaces a manual rotation focusing ring on a lens of the shooting device in a remote control mode, so that the purposes of remote focusing, intelligent focusing and automatic focus following are achieved.

The inventor creatively works to find that the whole focus follower on the market moves along with the position of a focusing ring on a lens, when the lens is longer, the focusing ring is far away from the camera body, or when the position of the focusing ring is far away from the camera body, the focus follower also moves to a position far away from the camera body, so when the camera is arranged on a movable platform such as a tripod head, the moment of the dead weight of the focus follower on the P axis of the tripod head is very large, so that the tripod head is difficult to level, and in order to overcome the dead weight of the focus follower, the leveling motor does more idle work, and the energy consumption of the leveling motor is higher.

In order to solve at least the above specific technical problems, the present application provides the following embodiments, so that the focus follower can adapt to lenses with different lengths without affecting the leveling of the pan-tilt.

Fig. 1 is a schematic structural diagram of a photographing device with a focus follower according to an embodiment of the present application; FIG. 2 is a schematic diagram of a focus follower according to an embodiment of the present application; FIG. 3 is a schematic diagram of an explosion structure of a focus follower according to an embodiment of the present application; FIG. 4a is a schematic view illustrating a state that a tracking gear of a tracking device approaches a driving assembly according to an embodiment of the present application; FIG. 4b is a schematic view illustrating a state that a tracking gear of a tracking device is away from a driving assembly according to an embodiment of the present application; referring to fig. 1 to fig. 4b, the focus follower provided in the present embodiment of the application may be used to cooperate with a lens of a photographing device to rotate the lens to adjust a focal length of the lens. The following coke device 100 of the embodiment of the application comprises a driving assembly 10, a following coke gear 20 and a displacement adjusting device 30.

Wherein, with burnt gear 20 and drive assembly 10 connection, with burnt gear 20 and be used for carrying out the rotary motion under drive assembly 10 drive. In this embodiment, the drive assembly 10 may include at least a power assembly 11 and a transmission assembly 12. The power assembly 11 may be used to provide power; the transmission assembly 12 is respectively connected with the power assembly 11 and the following coke gear 20, and is used for transmitting power generated by the power assembly 11 to the following coke gear 20. Wherein the connection of the transmission assembly 12 and the following coke gear 20 may include direct connection or indirect connection through an intermediate member, and the embodiment of the present application is not limited thereto. The drive assembly 12 may include at least one drive gear; alternatively, the transmission assembly 12 includes multiple step transmission gears designed with reasonable gear ratios and forming a reduction gear train. In this way, the torque transmitted from the power assembly 11 to the following gear 20 can be amplified, so that the output of the power assembly 11 can meet the requirement.

Specifically, the power assembly 11 may be used to provide a power source, and in the embodiment of the present application, the power assembly 11 may directly output a rotary motion for a rotary motor, or the power assembly 11 may directly output a linear motion for a linear motor, and the linear motion may be converted into a rotation by the transmission assembly 12. The transmission assembly 12 may be used to transmit power to a transmission element coupled to the sun gear 20 to rotate the sun gear 20. The transmission assembly 12 may be used to change the direction of motion of the motion output from the power assembly 11, change the rotational speed and/or torque transferred to the heel counter gear 20, and one skilled in the art may design the specific configuration of the transmission assembly 12 according to specific needs. For example, the transmission assembly 12 may include a plurality of intermeshing transmission gears; and/or the transmission assembly 12 may include an input wheel and an output wheel, and a timing belt wound between the input wheel and the output wheel; and/or, the transmission assembly 12 may include a gear and a rack; and/or, the transmission assembly 12 may include a worm gear, a worm, etc., and the specific structural forms of the transmission assembly 12 are all exemplified, and the embodiment of the present application is not particularly limited, as long as the entire driving assembly 10 can drive the following gear 20 to rotate.

Of course, in other embodiments, the driving assembly 10 may include only the power assembly 11, for example, the power assembly 11 is a rotating motor, and the rotating motor directly outputs the rotating motion to rotate the following gear 20.

It will be appreciated that the transmission assembly 12 may include a reduction mechanism such that torque output from the power assembly 11 is amplified by the action of the transmission assembly 12 such that torque output from the power assembly 11 is amplified.

The displacement adjusting device 30 is respectively connected with the driving assembly 10 and the following coke gear 20, and is used for adjusting the relative positions of the driving assembly 10 and the following coke gear 20 so as to enable the following coke gear 20 to move relative to the driving assembly 10. Specifically, the displacement adjustment device 30 may be movably connected with at least one of the drive assembly 10 and the tracking gear 20, such that the displacement adjustment device 30 may adjust the relative position between the tracking gear 20 and the drive assembly 10. For example, in some embodiments, the tracking gear 20 may be movably connected with the displacement adjustment device 30, so that the position of the tracking gear 20 on the displacement adjustment device 30 changes, and thus the relative position between the tracking gear 20 and the driving assembly 10 changes, so as to adapt to the difference of the positions of different focusing rings. Alternatively, in some other embodiments, the displacement adjustment device 30 may be movably connected to the driving assembly 10, and the connection point between the displacement adjustment device 30 and the driving assembly 10 is variable, for example, the displacement adjustment device 30 may be moved along the axial direction of the lens of the photographing device and connected to the driving assembly 10 at any position in the axial direction of the lens of the photographing device, so that the displacement adjustment device 30 may change the connection position substantially along the axial direction of the lens of the photographing device, thereby changing the relative position between the tracking gear 20 and the driving assembly 10, and also achieving the effect of matching lenses of different lengths and focusing rings at different positions without having a small influence on the leveling of the pan/tilt.

The focus follower provided by the embodiment of the application comprises a focus follower gear, wherein the focus follower gear is used for being meshed with a focusing ring of a lens so as to rotate the focusing ring to realize focusing, the focus follower gear is connected with a driving assembly, and a displacement adjusting device is used for adjusting the relative position of the focus follower gear and the driving assembly, so that the focus follower gear can move relative to the driving assembly. In an embodiment, the focus following gear is independently moved to be capable of adapting to shooting devices with different lens lengths, when the focus following gear is applied to a tripod head camera, the influence on the leveling of the tripod head is small, so that the tripod head leveling is easy, the energy consumption is saved, and the control of the tripod head camera is more stable.

In a preferred embodiment, as shown in fig. 1 and fig. 4a and 4b, the focus follower 100 is used to cooperate with a lens 201 of a photographing device 200 to adjust the focal length of the photographing device 200; when the relative positions of the driving assembly 10 and the following gear 20 are adjusted, the following gear 20 moves along the axial direction of the lens 201 of the photographing device 200. Since the following gear 20 is matched with the lens 201 of the photographing device 200, when focusing is performed on the following gear 20, the following gear 20 is usually meshed with the focusing ring 2011 on the lens 201, so as to drive the meshing focusing ring 2011 to rotate when the following gear 20 rotates, thereby realizing adjustment of focal length. The length of the lens 201 and the position of the focusing ring 2011 on the lens 201 are different from each other in the axial direction of the lens 201. Therefore, the moving direction of the following gear 20 is defined to move along the axial direction of the lens 201 of the photographing device 200.

In some embodiments, as shown in fig. 4a and 4b, the driving assembly 10 may include a power assembly 11 for providing power, and when the relative positions of the driving assembly 10 and the tracking gear 20 are adjusted, the tracking gear 20 moves along the axial direction of the power assembly 11 (the stippled line at the power assembly 11 in fig. 4a and 4b is the axial direction of the power assembly 11). The movement along the axial direction of the power unit 11 means that the movement direction of the sun gear 20 is parallel to the axial direction of the power unit 11, and does not limit the movement of the sun gear 20 in the axial direction of the power unit 11.

In some embodiments, the axis direction of the power assembly 11 may be parallel to the axis direction of the lens 201 of the photographing device 200, and then the moving direction of the tracking gear 20 may be parallel to the axis directions of the power assembly 11 and the lens 201 of the photographing device 200. Thus, the distance moved by the counter gear 20 is equal to the distance between the focus rings of the two lenses 201 matched, so that the movement of the counter gear 20 is most efficient.

In addition, it should be noted that the technical solution provided in the embodiment of the present application only needs to enable the following gear 20 to move relative to the driving assembly 10 and move to engage with the focusing ring 2011 of the lens 201 of the photographing device 200, so the moving direction of the following gear 20 is not limited, and in some alternative embodiments, the following gear 20 may even move along a curve, so long as it can move to engage with the corresponding focusing ring 2011 finally.

Further, as shown in fig. 1, when the following gear 20 is engaged with the focusing ring 2011 of the lens 201, the driving assembly 10 is closer to the body 202 of the photographing device 200 than the following gear 20. Since the purpose of the movement of the tracking gear 20 relative to the drive assembly 10 is to engage the focus ring 2011 on the lens 201 to move to the proper focus position. Therefore, when the focus follower 20 is engaged with the focus ring 2011, the camera 200 and the focus follower 100 are in a normal operation state, in which the driving assembly 10 is closer to the body 202 of the camera 200 than the focus follower 20.

Since the drive assembly 10 includes at least the power assembly 11 and the power assembly 11 is typically heavy, when the drive assembly 10 further includes the transmission assembly 12, the entire drive assembly 10 is heavier than the weight of the heel gear 20, and thus the center of gravity of the entire heel coke 100 is concentrated near the drive assembly 10. The weight of the camera 200 is also generally concentrated on the body 202, and when the camera 200 is mounted on a movable platform such as a cradle head, the body 202 is also generally mounted on the movable platform. Therefore, in the present embodiment, when the focus follower 100 is mounted on the photographing device 200, the driving assembly 10 is fixed to the body of the photographing device 200, and in addition, the position of the focus follower 20 is adjusted by the displacement adjusting device 30 so that the focus follower 20 is engaged with the focusing ring 201 of the photographing device 200. Since the driving unit 10 is fixed to the main body 201 of the photographing device 200, the position of the center of gravity of the whole of the focus follower 100 and the photographing device 200 does not change or may not change much, because the position of the focus follower 20 does not change. In this way, when the photographing device 200 is mounted on a movable platform such as a pan-tilt, the change of the focusing position of the focus device 100 has little influence on the change of the gravity center position of the whole system, which is beneficial to leveling of the movable platform such as the pan-tilt, and effectively reduces the output of the leveling motor and reduces the energy consumption.

It should be noted that, since the following gear 20 moves relative to the driving unit 10, in order to further weaken the influence of the movement of the following gear 20 on the center of gravity of the whole of the imaging device 200 and the following device 100, the following gear 20 may be preferably a plastic member with a relatively light weight, or an aluminum member with a relatively light weight, or other materials with relatively light weight may be selected by those skilled in the art to make the following gear 20 according to the actual situation.

As shown in fig. 1, in some embodiments, the diameter of the tracking gear 20 may be smaller than the diameter of the focus ring 2011 of the lens 201. Since the diameter of the focusing ring 2011 is determined by the diameter of the lens 201 of the photographing device 200, and the diameter of the focusing ring 2011 of the focusing gear 20 is smaller than that of the focusing ring 2011 of the lens 201 only for pulling the focusing ring 2011, the structure of the focusing device 100 and the photographing device 200 can be more compact, and the smaller the diameter of the focusing gear 20, the smaller the volume and the weight of the focusing gear 20 are under the same material, so that the influence of the movement of the focusing gear 20 on the whole focusing device 100 and the center of gravity of the photographing device 200 is smaller. Based on this, the person skilled in the art can, according to the actual situation, make the volume of the following-focus gear 20 as small as possible while satisfying the basic focusing function, so as to further weaken the influence of the movement of the following-focus gear 20 on the center of gravity of the whole product.

As shown in fig. 1 to 4b, in a specific embodiment, the displacement adjustment device 30 may include an output shaft 31, and the following gear 20 may be sleeved on the outer side of the output shaft 31 and capable of moving on the output shaft 31 along the axial direction of the output shaft 31 (as shown in fig. 4a and 4 b). Specifically, the output shaft 31 may be a hollow shaft to reduce its own weight, and in some embodiments, the output shaft 31 may be a solid shaft. One side of the output shaft 31 may be mechanically coupled to the drive assembly 10, or the other side of the output shaft 31 may extend from the drive assembly 10 to enable the tracking gear 20 to move on the output shaft 31 in the axial direction of the output shaft 31. More specifically, the output shaft 31 may be fixedly connected to the driving assembly 10, such that the driving assembly 10 outputs a rotational motion to rotate the output shaft 31 and rotate along with the following gear 20 on the output shaft 31. The output shaft 31 may be removably coupled to the drive assembly 10 by fasteners 40, or the output shaft 31 may be directly threadedly coupled to the drive assembly 10, for example, an external thread may be provided on the outside of the output shaft 31, and an internal thread may be provided on a component of the drive assembly 10 directly coupled to the output shaft 31, with the output shaft 31 being directly threadedly coupled to the drive assembly 10. Of course, the driving assembly 10 and the output shaft 31 may be fixed in a plurality of ways, for example, a clamping connection, a pin connection, a key connection, etc. The present application is not limited to the above-described embodiments.

In some embodiments, the output shaft 31 is detachably connected to the driving assembly 10, so that the output shaft 31 can be replaced individually, so as to avoid that when the length of the lens 201 is long, the length of the output shaft 31 is insufficient to meet the focusing requirement of the long lens 201. In addition, it is also possible to avoid that when the length of the lens 201 is short, the length of the output shaft 31 is too long, and the viewing angle range of the lens 201 is easily entered. Through output shaft 31 and drive assembly 10 detachably connection, can change the output shaft 31 of suitable length to satisfy the user demand under multiple scene.

Of course, it should be noted that, as shown in fig. 1, the focus follower 100 is generally mounted on the side of the photographing device 200 near the lens 201, as shown in fig. 1, in an embodiment, the output shaft 31 extends toward the direction away from the body 202 of the photographing device 200, and when the lens 201 of the photographing device 200 is very short or the focusing ring 2011 is located very close to the body 202 of the photographing device 200, the embodiment of the application can reversely mount the output shaft 31, so that the output shaft 31 extends toward the direction of the body 202 of the photographing device 200, and the focus follower 20 can be engaged with the focusing ring 2011. FIG. 4c is a schematic view illustrating a reverse installation of a tracking gear of a tracking device according to an embodiment of the present application; as shown in fig. 4c, in the state of the reversely mounted output shaft 31, specifically, fig. 4a and fig. 4c can be compared, the extending direction of the output shaft 31 in fig. 4a is approximately consistent with the direction of the power assembly 11, and the extending direction of the output shaft 31 in fig. 4c is basically deviated from the direction of the power assembly 11. Then, based on fig. 1 again, after the output shaft 31 is reversely assembled, the counter-mounted counter-focusing gear 20 on the output shaft 31 can be engaged with the shorter lens 201, or can be engaged with the focusing ring 2011 near the body 202, in some embodiments, can be engaged with the aperture ring on the lens 201, so as to realize aperture size control, thereby further expanding the application range of the counter 100.

While in order to embody the above effect, in some embodiments, the output shaft 31 may be detachably connected with the driving assembly 10. The output shaft 31 is detachably connected with the driving assembly 10, so that the output shaft 31 can be replaced conveniently, even the output shaft 31 with different lengths can be replaced, or the relative position of the output shaft 31 and the driving assembly 10 can be adjusted conveniently.

Further, as shown in fig. 3, the drive assembly 10 may include a hollow member 13 for mounting the output shaft 31, the output shaft 31 being capable of penetrating the hollow member 13. Specifically, the hollow member 13 may be a hollow shaft, a gear with a hole, or the like, as long as the hollow member can transmit rotational power and the output shaft 31 can pass through. Since the output shaft 31 can penetrate the hollow member 13, the output shaft 31 can be mounted in the forward direction in the manner shown in fig. 4a and 4b, or in the reverse direction in the manner shown in fig. 4c, so that the lens 201 with different lengths and the focusing ring 2011 with different positions can be more flexibly matched.

Based on this embodiment, the end of the output shaft 31 adjacent to the drive assembly 10 and the hollow member 13 may be secured by fasteners 40. As shown in fig. 3, the fastener 40 may be a nut, and the output shaft 31 may have a stepped surface 311 that abuts the driving assembly 10, where the fastener 40 and the stepped surface 311 are located on different sides of the driving assembly 10. Specifically, the driving assembly 10 may also have a mating surface 14 that mates with the stepped surface 311 of the output shaft 31, and more specifically, the mating surface 14 may be provided on the hollow member 13. The stepped surface 311 of the output shaft 31 abuts against the mating surface 14 of the drive assembly 10 and cooperates with the fastener 40 to lock the output shaft 31 to the drive assembly 10 so that the output shaft 31 can rotate under the action of the drive assembly 10.

Alternatively, in other embodiments, there may be a first mounting location and a second mounting location on the drive assembly 10 for mounting the output shaft 31, wherein the mounting opening of the first mounting location and the mounting opening of the second mounting location face away from each other. For example, the first mounting location may be a threaded hole formed on the driving assembly 10, the second mounting location may be another threaded hole formed on the driving assembly 10, the two threaded holes may be blind holes, and the mounting openings of the two threaded holes are located on different sides of the driving assembly 10. The output shaft 31 may be mounted in the forward direction in the first mounting position, and when it is desired to be mounted in the second mounting position, the output shaft 31 may be rotated 180 ° and then mounted to the second mounting position.

For the specific implementation of the forward and reverse assembly of the output shaft 31, the foregoing are all examples, and those skilled in the art may also specifically design the output shaft according to the actual situation, and the embodiment of the present application is not particularly limited.

In addition, further, a circumferential positioning structure may be provided between the driving assembly 10 and the output shaft 31, and the circumferential positioning structure may be at least used for performing circumferential positioning between the driving assembly 10 and the output shaft 31. Thereby, the circumferential fixation between the output shaft 31 and the driving assembly 10 can be ensured, and the driving assembly 10 can drive the output shaft 31 to rotate reliably. Of course, it will be appreciated that the circumferential locating feature may be used for more than just circumferential locating, and in some embodiments, for radial and/or axial locating of the output shaft 31 with the drive assembly 10.

Specifically, the circumferential positioning structure may include a protrusion M provided on the driving assembly 10, and a groove N provided on the output shaft 31. In some embodiments, the circumferential positioning structure includes a groove provided on the drive assembly 10, and a protrusion provided on the output shaft 31.

In some embodiments, the output shaft 31 may be circumferentially fixed with the following gear 20. So that the following gear 20 can only move along the axial direction of the output shaft 31 when moving on the output shaft 31, but cannot rotate while moving, thereby improving the operation feel. In addition, since the output shaft 31 is fixed to the following gear 20 in the circumferential direction, the following gear 20 can be reliably rotated when the output shaft 31 is driven to rotate by the driving unit 10, and the reliability of the whole device is improved.

In order to fix the following gear 20 and the output shaft 31 circumferentially, specifically, as shown in fig. 3, a cross section of a mating section 312 on the output shaft 31, which mates with the following gear 20, is non-circular; and/or the cross section of the inner bore of the following coke gear 20 is non-circular. More specifically, the shape of the cross section of the mating section 312 of the output shaft 31 that mates with the coke gear 20 includes at least one of the following: square, D-shaped, regular hexagonal, diamond-shaped. The shape of the cross-section of the bore of the counter gear 20 may match the shape of the cross-section of the mating segment 312 of the output shaft 312. For example, the cross-sectional shape of the mating segment 312 of the output shaft 31 may or may not match the shape of the bore of the counter gear 20, and when the cross-sectional shape of the mating segment 312 of the output shaft 31 does not match the shape of the bore of the counter gear 20, for example, the cross-sectional shape of the mating segment 312 may be elliptical, and the shape of the bore of the counter gear 20 may be circular, which may have a diameter equal to the minor diameter of the ellipse, such that the mating segment 312 is also prevented from rotating relative to the counter gear 20, and the output shaft 31 and the counter gear 20 may also be positioned circumferentially relative to each other.

In this embodiment, the cross section of the mating section 312 is D-shaped, and correspondingly, the inner bore of the following coke gear 20 is D-shaped to mate with the mating section 312. The mode is simple in structure, simple to manufacture and low in cost, and can reliably ensure circumferential positioning between the following coke gear 20 and the output shaft 31.

In some embodiments, the displacement adjustment device 30 may further include a locking device 32, where the locking device 32 is configured to loose fit between the tracking gear 20 and the output shaft 31 when the tracking gear 20 is displaced, and the locking device 32 is further configured to tightly fit between the tracking gear 20 and the output shaft 31 after the displacement adjustment is completed. That is, the lock device 32 is operated to switch between the lock state and the unlock state between the sun gear 20 and the output shaft 31. In the locked state, the following coke gear 20 is tightly fitted (specifically, may be understood as interference fit) with the output shaft 31, the following coke gear 20 is reliably locked on the output shaft 31, the following coke gear 20 is relatively fixed with the output shaft 31, the following coke gear 20 cannot move on the output shaft 31 in the axial direction, and the following coke gear 20 cannot rotate relative to the output shaft 31. In the unlocked state, the following coke gear 20 is loosely fitted (which may be understood to be a clearance fit in particular) to the output shaft 31, and the following coke gear 20 is movable on the output shaft 31 in the axial direction of the output shaft 31.

As shown in fig. 3, in one embodiment, the locking device 32 includes a lock nut 321 and a hug assembly 322. The lock nut 321 may be sleeved outside the output shaft 31, and a portion of the lock nut 321 in the axial direction may be used for screw-fitting with the coke gear 20. Specifically, the following gear 20 may include a gear section 21 and a thread section 22, the gear section 21 may be used to engage with the focusing ring 2011 of the lens 201, and the thread section 22 is used to be screwed with the lock nut 321.

The hugging assembly 322 may be provided between the lock nut 321 and the output shaft 31, and another portion of the lock nut 321 in the axial direction may be used to press the hugging assembly 322. The hug assembly is capable of being deformed in a radial direction under the extrusion of the lock nut 321 to hug the output shaft 31 while the lock nut 321 moves in the screwing direction of the screw-in follow-up gear 20. Through the dual functions of the lock nut 321 and the enclasping component 322, the locking device 32 can stably and reliably enclasp the following coke gear 20 and the output shaft 31, and the circumferential fixation of the following coke gear and the output shaft 31 is realized.

Referring further to fig. 3, a hugging assembly 322 according to the present embodiment may include: the hug ring 3221, the hug ring 3221 may include a tapered portion 3221a contacting an inner hole wall of the lock nut 321, a small diameter end of the tapered portion 3221a is far away from the follow gear 20, and the tapered portion 3221a has a plurality of gaps 3221b arranged at intervals. The tapered portion 3221a is contracted in the radial direction to hug the output shaft 31 while the lock nut 321 is moved in the screwing direction. Specifically, the hugging ring 3221 of the present embodiment may be made of a material capable of elastic deformation, for example, a plastic member having a small hardness, so that the hugging ring 3221 is capable of deformation in the radial direction.

It can be appreciated that the specific structure of the above-mentioned holding ring 3221 is only one specific implementation manner capable of radially holding, and the structure is simple and easy to process and manufacture. While it is not to be excluded that in other embodiments, the hug assembly 322 may have other structures, for example, the structure of the hug ring 3221 may not include the tapered portion 3221a, a floating body capable of floating in the radial direction may be provided on the hug ring 3221, and the lock nut 321 compresses the floating body while moving in the screwing direction, so that the floating body moves inward in the radial direction to hug the output shaft 31. The holding ring 3221 may have various structural forms, and those skilled in the art may design the holding ring according to the needs, which is not limited herein.

Still further, the hugging assembly 322 may include: anti-slip sleeve 3222, anti-slip sleeve 3222 may be disposed at least between output shaft 31 and tapered portion 3221a of hugging ring 3221. In particular, the anti-slip sleeve 3222 may include at least one of: rubber, foam, soft nylon. When the lock nut 321 is screwed, the lock nut 321 radially presses the tapered portion 3221a of the holding ring 3221, the notch 3221b of the tapered portion 3221a is contracted, the entire tapered portion 3221a holds the anti-slip sleeve 3222, and the anti-slip sleeve 3222 holds the output shaft 31. Because the anti-slip sleeve 3222 is easy to deform along the radial direction, the friction force between the enclasping assembly 322 and the output shaft 31 can be improved, and further the stability of the relative fixation of the following coke gear 20 and the output shaft 31 can be further improved.

In some embodiments, fig. 5 is a side view of a focus follower according to an embodiment of the application. As shown in fig. 1 to 3 and 5, the driving assembly 10 may include a housing 10a, and the housing 10a has a fixing assembly 50 thereon, and the fixing assembly 50 is used to connect the driving assembly 10 with an external device. The external device may include a carrying portion of the movable platform and/or a photographing device. In an embodiment, the movable platform may be a cradle head, and the photographing device may be a cradle head camera mounted on the cradle head. The fixing component 50 can connect the driving component 10 with the pan-tilt or pan-tilt camera, so that the focus follower 100 is fixed, and the focus follower 100 forms an entire system with the pan-tilt and pan-tilt camera.

The fixing assembly 50 may be detachably coupled to an external device by fasteners such as screws, etc., so that the entire heel focus apparatus 100 can be detached from the external device. Alternatively, the fixing assembly 50 may be detachably coupled to the housing 10a, and the fixing assembly 50 may be a separate functional component.

In this embodiment, as shown in fig. 3, the housing 10a may have a boss 11a, and the fixing assembly 50 is detachably fixed to the boss 11a. The fixing member 50 may have a through hole 51 through which the boss 11a passes. The fixing member 50 is supported by the boss 11a, and the fixing member 50 is easily installed and positioned quickly.

Specifically, the fixing assembly 50 may include a first split 50a, a second split 50b, and a first force application device 501; one side of the first split 50a is fixedly connected with one side of the second split 50b, the other side of the first split 50a and the other side of the second split 50b are free ends, and a clamping space X for clamping the convex column 11a is arranged between the first split 50a and the second split 50 b. The cross section of the clamping space X may be matched with the cross section of the stud 11a so that the stud 11a can be better fitted with the side wall of the clamping space X.

The first force application device 501 is configured to apply a force to the first and second split bodies 50a and 50b to approach each other, so that the first and second split bodies 50a and 50b sandwich the boss 11a. One end of the first split 50a and one end of the second split 50b may be connected together, and the other end of the first split 50a and the other end of the second split 50b may be disposed opposite to each other and be free ends. The first force application device 501 may be disposed at the other end of the first sub-body 50a and the other end of the second sub-body 50b, and may be capable of relatively approaching the first sub-body 50a to the second sub-body 50b, so that the first sub-body 50a and the second sub-body 50b apply a clamping force to the boss 11a. Specifically, the first force application device 501 may include a threaded fastener, where the free end of the first sub-body 50a has a first screw hole, and the free end of the second sub-body 50b has a second screw hole, and the threaded fastener passes through the first screw hole and the second screw hole to apply a pre-tightening force to the first sub-body 50a and the second sub-body 50 b. The clamping force is applied by tightening and loosening the threaded fastener, or the clamping space is loosened, and the device has simple structure and operation mode and lower cost. The magnitude of the pre-tightening force applied by the threaded fastener can determine the magnitude of the clamping force of the first split 50a and the second split 50b, and the pre-tightening force applied by the threaded fastener can be generally larger, so that the requirement of the clamping force of the first split 50a and the second split 50b can be effectively met, and the fixing assembly 50 can be firmly fixed.

In the present embodiment, the cross section of the boss 11a may include a circular shape, or may include any shape such as a square shape, a hexagonal shape, an elliptical shape, or the like, and the present embodiment is not limited thereto.

In addition, in the present embodiment, the first screw hole may include a light hole, and the second screw hole may include a screw hole; alternatively, the first screw hole comprises a threaded hole, and the second screw hole comprises a light hole; alternatively, the first screw hole includes a threaded hole, and the second screw hole includes a threaded hole. In this embodiment, at least one of the screw holes is a threaded hole, and the first and second split bodies 50a and 50b can approach each other under the pre-tightening force applied by the threaded fastener to generate a clamping force on the boss 11 a.

When the clamping force is sufficiently large, the fixing member 50 can be stably fixed to the boss 11a, that is, the fixing member 50 and the driving member 10 can be stably fixed. The convex column 11a and the fixing component 50 are clamped and fixed, so that the follow-up coke device 100 can be quickly assembled and disassembled on external equipment, and the operation efficiency is improved.

With reference to fig. 3 and 5, further, the fixing assembly 50 may further include: a second force application device 502. The second force application device 502 may be disposed on a side of the second sub-body 50b away from the first sub-body 50a, where the second force application device 502 has a pushing member 5021, and the pushing member 5021 is configured to push against a side of the second sub-body 50b away from the first sub-body 50a, so as to move the free end of the second sub-body 50b toward the free end close to the first sub-body 50 a. By the auxiliary abutting action of the second force application device 502, the relative separation of the first split 50a and the second split 50b can be further prevented, so that the reliability of clamping the first split 50a and the second split 50b on the convex column 11a is improved, and the fixing reliability between the fixing assembly 50 and the driving assembly 10 is further improved.

The second force application device 502 may be rotatably coupled to the second sub-body 50b. The user can operate the second force application device 502 to rotate the second force application device 502 to the first position or the second position relative to the second sub-body 50b, for example, when the second force application device 502 is in the first position, the abutting piece 5021 of the second force application device 502 can abut against the second sub-body 50b to enable the second sub-body 50b to move close to the first sub-body 50a, so that the clamping force between the first sub-body 50a and the second sub-body 50b can be simply and conveniently increased, the assembly reliability is improved, and the operation is convenient and simple. When the second force application device 502 rotates to the second position, the pushing force to the second sub-body 50b can be released or reduced, so that the clamping force between the first sub-body 50a and the second sub-body 50b is reduced to primarily release the focus follower, and then the first force application device 501 is operated to completely separate the convex column 11a from the fixing component 50, so that the focus follower is independently detached, and the focus follower is simple in structure and convenient to operate.

In one embodiment, as shown in fig. 5, the abutment 5021 can comprise a cam structure comprising a large diameter portion 5021a and a small diameter portion 5021b; during rotation of the cam structure, when the large diameter portion 5021a abuts against the second split 50b, the distance between the free end of the second split 50b and the free end of the first split 50a is minimized, so that the fixing assembly 50 is in the locked state. The large diameter portion 5021a refers to a portion of the cam structure where the edge of the cam is farthest from the center of rotation of the cam, and the small diameter portion 5021b may be other portions than the large diameter portion 5021 a.

During rotation of the cam structure, the small diameter portion 5021b can abut against the second split 50b, that is, the abutting force when the large diameter portion 5021a abuts against the second split 50b is greater than the abutting force when the small diameter portion 5021a abuts against the second split 50b. Alternatively, in some embodiments, the small diameter portion 5021b is always spaced from the second segment 50b during rotation of the cam structure, i.e., only the large diameter portion 5021a can abut the second segment 50b, and once rotated through an angle, the abutment relationship between the cam structure and the second segment 50b is lost. So long as the cam structure is able to vary the amount of force against the second segment 50b during rotation.

In some embodiments, as shown in fig. 5, there may also be a buffer member 503 between the abutment member 5021 and the second sub-body 50b, the abutment member 5021 abutting the second sub-body 50b by abutting the buffer member 503. Specifically, the material of the buffer member 503 may include at least one of: rubber, foam, soft nylon, etc., the buffer member 503 may be fixed to the second split 50b; alternatively, the buffer 503 is fixed to the abutting piece 5021. In a preferred embodiment, the buffer member 503 may be adhered to the side of the second sub-body 50b facing the abutment member 5021, where the buffer member 503 is disposed to reduce wear of the cam structure, effectively protect components and avoid slippage during rotation of the cam structure.

Further, the second force applying device 50 may further include an operating member 5022 connected with the cam structure, and the operating member 5022 may be configured to receive an external force to rotate the cam structure. Specifically, the shape of the operation member 5022 may include at least one of: wrench-shaped, knob-shaped, and pull-ring-shaped. Of course, the shape of the operation member 5022 is not limited to the above, and those skilled in the art can specifically design the present application.

The focus follower 100 provided in this embodiment is detachably connected to a movable platform or a photographing device through the fixing assembly 50, which is beneficial to adapting to lenses 201 with different diameters. Specifically, when adapting to lenses 201 with different diameters, the operator 5022 may be first pulled up to make the whole fixing assembly 50 in a non-locking state, rotate the focus follower 100 to make the focus follower 20 meshed with the tooth shape of the focusing ring 2011 on the lens 201, then buckle the operator 5022, hug the boss 11a tightly, and further complete the angle adjustment and locking of the whole focus follower 100.

Some embodiments of the present application further provide a movable platform, which includes at least a carrying portion for connecting with a photographing device, and a focus follower 100 matched with the photographing device 200, wherein the focus follower 100 may be connected to the carrying portion or may be connected to the photographing device 200.

The focus follower 100 includes: a drive assembly 10, a sun gear 20 and a displacement adjustment device 30.

Specifically, the following gear 20 is connected to the driving assembly 10, and is used for performing rotational movement under the driving of the driving assembly 10. The displacement adjusting device 30 is respectively connected with the driving assembly 10 and the following coke gear 20, and is used for adjusting the relative positions of the driving assembly 10 and the following coke gear 20 so as to enable the following coke gear 20 to move relative to the driving assembly 10.

The movable platform of the embodiment may be a handheld cradle head or an unmanned aerial vehicle cradle head, and the photographing apparatus 200 may be a video camera, a still camera or other photographing devices. The cradle head may specifically include a carrying portion for carrying the photographing device 200, so as to allow the cradle head to carry out the operation by carrying the photographing device 200.

Fig. 6 is a schematic structural diagram of a cradle head with a camera according to an embodiment of the present application. As shown in fig. 6, in an exemplary embodiment, the cradle head may include a shaft assembly, a carrier 300 connected to the shaft assembly and used to mount the photographing device 200, and a focus follower 100. The cradle head of the embodiment can be a two-axis cradle head, a three-axis cradle head, a four-axis cradle head and the like. As shown in fig. 6, the pan head is a three-axis pan head, and the shaft assembly may include a yaw (yaw) shaft assembly including a yaw shaft arm 220 and a yaw motor, a roll (roll) shaft assembly including a roll shaft arm 230 and a roll motor, and a pitch (pitch) shaft assembly including a pitch shaft arm 210 and a pitch motor.

In the present embodiment, the driving assembly 10 of the focus follower 100 may be on the body of the photographing device 200 or on the carrying part. The body 202 and the bearing part of the photographing device 200 are close to the pitching axis assembly of the pan-tilt, so that the driving assembly 10 of the focus follower 100 is close to the pitching axis assembly and is always close to the pan-tilt axis assembly, so that the moment generated by the dead weight of the focus follower 100 is small, a large load is not caused on the pitching axis motor, the pan-tilt is easy to level, and the control is stable. In some embodiments, the drive assembly 10 includes a power assembly 11 for providing power, and the tracking gear 20 moves along the axis of the power assembly 11; and/or, the following gear 20 moves along the axial direction of the lens 201 of the photographing device 200.

In some embodiments, when the tracking gear 20 is engaged with the focus ring 2011 of the lens 201, the drive assembly 10 may be closer to the body 202 of the camera 200 than the tracking gear 20.

In some embodiments, the diameter of the tracking gear 20 may be smaller than the diameter of the focus ring 2011 of the lens 201.

In some embodiments, the displacement adjustment device 30 includes an output shaft 31, and the following gear 20 may be sleeved on the outer side of the output shaft 31 and capable of moving on the output shaft 31 in the axial direction.

In some embodiments, the output shaft 31 is circumferentially fixed with the following gear 20.

In some embodiments, the cross-section of the mating segment of the output shaft 31 that mates with the coke gear 20 is non-circular; and/or the cross section of the inner hole of the follow-focus gear is non-circular.

In some embodiments, the shape of the cross-section of the mating segment of the output shaft 31 that mates with the coke gear 20 includes at least one of: square, D-shaped, regular hexagonal, diamond-shaped.

In some embodiments, the shape of the cross-section of the bore of the counter gear 20 matches the shape of the cross-section of the mating segment of the output shaft 31.

In some embodiments, the displacement adjustment device 30 further includes a locking device 32, where the locking device 32 is configured to loose fit between the tracking gear 20 and the output shaft 31 when the tracking gear 20 is displaced, and the locking device 32 is further configured to tightly fit between the tracking gear 20 and the output shaft 31 after the displacement adjustment is completed.

In some embodiments, the locking device 32 comprises: the lock nut 321 is sleeved on the outer side of the output shaft 31, and a part of the lock nut 321 in the axial direction is used for being in threaded fit with the coke gear 20; the enclasping component 322 is arranged between the lock nut 321 and the output shaft 31, and the other part of the lock nut 321 in the axial direction is used for extruding the enclasping component 322; the hug assembly 322 is capable of being deformed in a radial direction under the extrusion of the lock nut 321 to hug the output shaft 31 while the lock nut 321 is moved in the screwing direction of the screw-in counter gear 20.

In some embodiments, the hug assembly 322 includes: a holding ring 3221, wherein the holding ring 3221 comprises a conical portion 3221a contacted with an inner hole wall of the lock nut 321, a small diameter end of the conical portion 3221a is far away from the follow-up gear 20, and the conical portion 3221a is provided with a plurality of gaps 3221b which are arranged at intervals; the tapered portion 3221a is contracted in the radial direction to hug the output shaft 31 while the lock nut 321 is moved in the screwing direction.

In some embodiments, the hug assembly 322 includes: anti-slip sleeve 3222, anti-slip sleeve 3222 is provided at least between output shaft 31 and tapered portion 3221a of hugging ring 3221.

In some embodiments, the material of the anti-slip sleeve 3222 includes at least one of the following: rubber, foam, soft nylon.

In some embodiments, the drive assembly includes a hollow member 13 for mounting the output shaft 31, the output shaft 31 being capable of penetrating the hollow member 13; alternatively, the drive assembly 10 has a first mounting location and a second mounting location for mounting the output shaft 31, wherein the mounting opening of the first mounting location and the mounting opening of the second mounting location are facing away from each other.

In some embodiments, the end of the output shaft 31 adjacent the drive assembly 10 is secured to the hollow member 13 by a fastener 40.

In some embodiments, the output shaft 31 has a stepped surface 311 thereon that abuts the drive assembly 10, with the fastener 40 and the stepped surface 311 being located on different sides of the drive assembly 10, respectively.

In some embodiments, the drive assembly 10 and the output shaft 31 have a circumferential positioning structure therebetween, which is at least used to circumferentially position the drive assembly 10 and the output shaft 31.

In some embodiments, the circumferential positioning structure comprises a protrusion M provided on the drive assembly 10, and a groove N provided on the output shaft 31; and/or the circumferential positioning structure comprises a groove arranged on the driving assembly 10 and a protrusion arranged on the output shaft 31.

In some embodiments, the driving assembly 10 includes a housing 10a, and the housing 10a has a fixing assembly 50 thereon, where the fixing assembly 50 is used to mount the driving assembly 10 on the carrier.

In some embodiments, one side of the securing assembly 50 is removably connected to the carrier; and/or the other side of the fixing member 50 is detachably coupled with the housing 10 a.

In some embodiments, the housing 10a has a post to which the securing assembly 50 is removably secured.

In some embodiments, the securing assembly 50 includes a first sub-body 50a, a second sub-body 50b, and a first force application device 501; one side of the first split 50a is fixedly connected with one side of the second split 50b, the other side of the first split 50a and the other side of the second split 50b are free ends, and a clamping space X for clamping the convex column 11a is arranged between the first split 50a and the second split 50 b.

The first force application device 501 is configured to apply a force to the first and second split bodies 50a and 50b to approach each other, so that the first and second split bodies 50a and 50b sandwich the boss 11a.

In some embodiments, the cross section of the clamping space X matches the cross section of the boss 11a.

In some embodiments, the first force application device 501 comprises a threaded fastener having a first threaded bore at a free end of the first segment 50a and a second threaded bore at a free end of the second segment 50b, the threaded fastener passing through the first and second threaded bores to apply a preload force to the first and second segments 50a, 50 b.

In some embodiments, the first screw hole comprises a light hole and the second screw hole comprises a threaded hole;

alternatively, the first screw hole comprises a threaded hole, and the second screw hole comprises a light hole;

alternatively, the first screw hole includes a threaded hole, and the second screw hole includes a threaded hole.

In some embodiments, the securing assembly 50 further includes: a second force application device 502; the second force application device 502 is disposed on the side of the second sub-body 50b away from the first sub-body 50a, and the second force application device 502 has a pushing member 5021, where the pushing member 5021 is used to push against the side of the second sub-body 50b away from the first sub-body 50a, so as to move the free end of the second sub-body 50b towards the free end close to the first sub-body 50 a.

In some embodiments, the second force application device 502 is rotatably coupled to the second sub 50b.

In some embodiments, the abutment 5021 comprises a cam structure comprising a large diameter portion 5021a and a small diameter portion 5021b; during rotation of the cam structure, when the large diameter portion 5021a abuts against the second split body 50b, the distance between the free end of the second split body 50b and the free end of the first split body 50a is minimized, so that the fixing assembly 50 is in the locked state.

In some embodiments, the minor diameter 5021b can abut the second segment 50b during rotation of the cam structure; alternatively, the small diameter portion 5021b and the second split 50b always have a spacing during rotation of the cam structure.

In some embodiments, the second force application device 502 includes an operator 5022 coupled to the cam structure, the operator 5022 being configured to receive an external force to rotate the cam structure.

In some embodiments, the shape of the operator 5022 comprises at least one of the following: wrench-shaped, knob-shaped, and pull-ring-shaped.

In some embodiments, there is a bumper 503 between the abutment 5021 and the second segment 50b, the abutment 5021 abutting the second segment 50b by abutting the bumper 503.

In some embodiments, the material of the buffer 503 includes at least one of: rubber, foam, soft nylon.

In some embodiments, the buffer 503 is secured to the second sub 50b; and/or, the buffer member 503 is fixed to the abutting member 5021.

It should be noted that, the structure and the function of the focus follower 100 in the movable platform provided in the present embodiment are the same as those of the above-mentioned embodiment, and specific reference may be made to the description of the above-mentioned embodiment, which is not repeated here.

Some embodiments of the present application further provide a photographing apparatus 200, including a main body 202, a lens 201, and a focus follower 100, wherein the focus follower 100 is mounted on the main body 202;

wherein, the focus follower 100 includes: a drive assembly 10, a sun gear 20 and a displacement adjustment device 30.

The focus follower 100 in this embodiment may have the same structure and function as the focus follower 100 in the above embodiment, and the description of the focus follower 100 in the above embodiment may be referred to specifically, and will not be repeated here. In the several embodiments provided by the present application, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other forms.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims

A focus follower, comprising:

a drive assembly;

the focus following gear is connected with the driving assembly and used for performing rotary motion under the driving of the driving assembly;

and the displacement adjusting device is respectively connected with the driving assembly and the following coke gear and is used for adjusting the relative positions of the driving assembly and the following coke gear so that the following coke gear can move relative to the driving assembly.
The heel counter according to claim 1, wherein,

the drive assembly comprises a power assembly for providing power, and when the relative positions of the drive assembly and the following coke gear are adjusted, the following coke gear moves along the axial direction of the power assembly;

And/or, the focus follower is used for being matched with a lens of a shooting device so as to adjust the focal length of the shooting device; when the relative positions of the driving assembly and the following focus gear are adjusted, the following focus gear moves along the axial direction of the lens of the shooting device.
The focus follower as defined in claim 1, wherein the focus follower is adapted to cooperate with a lens of a camera to adjust a focal length of the camera; when the focus following gear is meshed with the focusing ring of the lens, the driving assembly is closer to the body of the shooting device than the focus following gear.
The focus follower of claim 1 wherein a diameter of the focus follower is less than a diameter of a focus ring of the lens.
The focus follower as defined in claim 1, wherein the displacement adjustment means comprises an output shaft, wherein the focus follower is sleeved on the outer side of the output shaft and is capable of moving on the output shaft in the axial direction of the output shaft.
The heel counter of claim 5 wherein the output shaft is circumferentially fixed to the heel Jiao Chi wheel.
The focus follower as defined in claim 6, wherein a mating segment of the output shaft that mates with the focus follower is non-circular in cross-section; and/or the cross section of the inner hole of the following coke gear is non-circular.
The heel counter of claim 7, wherein a cross-sectional shape of a mating segment of the output shaft that mates with the heel gear comprises at least one of: square, D-shaped, regular hexagonal, diamond-shaped.
The focus follower of claim 7 wherein a cross-section of the bore of the focus follower is shaped to match a cross-section of the mating section of the output shaft.
The focus follower of claim 1 wherein the displacement adjustment means further comprises a locking means for loose fitting the focus following gear to the output shaft upon displacement adjustment of the focus following gear, the locking means further for tight fitting the focus following gear to the output shaft upon completion of displacement adjustment.
The heel counter according to claim 10, wherein the locking means comprises:

the lock nut is sleeved on the outer side of the output shaft, and one part of the lock nut in the axial direction is used for being in threaded fit with the focus following gear;

the locking nut is arranged between the output shaft and the output shaft, and the other part of the locking nut in the axial direction is used for extruding the locking assembly;

The enclasping assembly can deform in the radial direction under the extrusion of the lock nut so as to enclasp the output shaft while the lock nut moves along the screwing direction of the focus following gear.
The heel counter of claim 11, wherein the hugging assembly comprises:

the clamping ring comprises a conical part which is contacted with the inner hole wall of the lock nut, the small diameter end of the conical part is far away from the following coke gear, and the conical part is provided with a plurality of gaps which are arranged at intervals;

the tapered portion contracts in a radial direction to hug the output shaft while the lock nut moves in the screwing direction.
The heel counter of claim 12, wherein the hugging assembly comprises: the anti-skid sleeve is at least arranged between the output shaft and the conical part of the holding ring.
The heel counter of claim 13, wherein the material of the anti-skid sleeve comprises at least one of: rubber, foam, soft nylon.
The heel counter of claim 5, wherein the output shaft is detachably connected to the drive assembly.
The heel counter according to claim 15, wherein the drive assembly comprises a hollow member for mounting the output shaft, the output shaft being capable of passing through the hollow member.
The heel counter according to claim 15, wherein there is a first mounting location and a second mounting location on the drive assembly for mounting the output shaft, wherein the mounting opening of the first mounting location and the mounting opening of the second mounting location face away from each other.
The heel counter according to claim 16, wherein an end of the output shaft proximate the drive assembly is secured to the hollow member by a fastener.
The heel counter according to claim 18, wherein the output shaft has a stepped surface thereon that abuts the drive assembly, the fastener and the stepped surface being on different sides of the drive assembly.
The heel counter according to claim 5, wherein the drive assembly and the output shaft have a circumferential positioning structure therebetween, the circumferential positioning structure being at least for circumferentially positioning the drive assembly and the output shaft.
The focus follower as defined in claim 20, wherein the circumferential positioning structure comprises a projection provided on the drive assembly and a recess provided on the output shaft;

And/or, the circumferential positioning structure comprises a groove arranged on the driving assembly and a protrusion arranged on the output shaft.
The heel counter of claim 1, wherein the drive assembly comprises:

a power assembly for providing power;

and the transmission assembly is respectively connected with the power assembly and the focus following gear and is used for transmitting power generated by the power assembly to the focus following gear.
The heel counter according to claim 1, wherein the drive assembly comprises a housing having a securing assembly thereon for connecting the drive assembly to an external device.
The heel counter according to claim 23, wherein the securing assembly is removably connected to the housing.
The heel counter according to claim 24, wherein the housing has a post, the securing assembly being removably secured to the post.
The heel counter according to claim 25, wherein the fixation assembly comprises a first split, a second split, and a first force application device;

one side of the first split body is fixedly connected with one side of the second split body, the other side of the first split body and the other side of the second split body are free ends, and a clamping space for clamping the convex column is arranged between the first split body and the second split body;

The first force application device is used for applying a force to the first split body and the second split body, so that the first split body and the second split body clamp the convex column.
The heel counter of claim 26, wherein a cross-section of the clamping space matches a cross-section of the post.
The heel counter of claim 26, wherein the first force applying means comprises a threaded fastener, the free end of the first section having a first threaded bore and the free end of the second section having a second threaded bore, the threaded fastener passing through the first and second threaded bores to apply a preload force to the first and second sections.
The heel counter of claim 28, wherein the first screw hole comprises an optical hole and the second screw hole comprises a threaded hole;

alternatively, the first screw hole comprises a screw hole, and the second screw hole comprises a light hole;

alternatively, the first screw hole includes a screw hole, and the second screw hole includes a screw hole.
The heel counter of claim 26, wherein the securing assembly further comprises: a second force application device;

The second force application device is arranged on one side, far away from the first split, of the second split, and is provided with a propping piece, and the propping piece is used for propping one side, far away from the first split, of the second split so as to enable the free end of the second split to move towards the free end, close to the first split.
The heel counter according to claim 30, wherein the second force applying means is rotatably connected to the second split.
The heel counter according to claim 31, wherein the abutment comprises a cam structure comprising a large diameter portion and a small diameter portion;

during the rotation of the cam structure, when the large-diameter part abuts against the second split body, the distance between the free end of the second split body and the free end of the first split body is minimum, so that the fixing assembly is in a locking state.
The heel counter according to claim 32, wherein the minor diameter portion is capable of abutting the second split during rotation of the cam structure;

or in the rotation process of the cam structure, the small-diameter part and the second split body are always provided with a distance.
The heel counter according to claim 32, wherein the second force applying means comprises an operating member coupled to the cam structure, the operating member for receiving an external force to rotate the cam structure.
The heel counter according to claim 34, wherein the shape of the operating member comprises at least one of: wrench-shaped, knob-shaped, and pull-ring-shaped.
The heel counter according to claim 30, wherein there is a cushioning member between the abutment member and the second sub-body, the abutment member abutting the second sub-body by abutting the cushioning member.
The heel counter of claim 36, wherein the material of the cushioning member comprises at least one of: rubber, foam, soft nylon.
The heel counter according to claim 36, wherein the cushioning member is secured to the second body;

and/or, the buffer piece is fixed on the propping piece.
The utility model provides a shooting device, its characterized in that includes fuselage, camera lens and follow burnt ware, follow burnt ware install in the fuselage, wherein, follow burnt ware includes:

a drive assembly;

the focus following gear is connected with the driving assembly and used for performing rotary motion under the driving of the driving assembly;

And the displacement adjusting device is respectively connected with the driving assembly and the following coke gear and is used for adjusting the relative positions of the driving assembly and the following coke gear so that the following coke gear can move relative to the driving assembly.
The photographing device of claim 39, wherein the camera comprises,

the drive assembly comprises a power assembly for providing power, and when the relative positions of the drive assembly and the following coke gear are adjusted, the following coke gear moves along the axial direction of the power assembly;

and/or, the focus follower is used for being matched with the lens so as to adjust the focal length of the shooting device; when the relative positions of the driving assembly and the following focus gear are adjusted, the following focus gear moves along the axial direction of the lens.
The camera of claim 39, wherein the focus follower is configured to cooperate with the lens to adjust a focal length of the camera; when the focus following gear is meshed with the focusing ring of the lens, the driving assembly is closer to the body of the shooting device than the focus following gear.
The photographing device of claim 39, wherein the diameter of the following gear is smaller than the diameter of the focusing ring of the lens.
The photographing device of claim 39, wherein the displacement adjusting device comprises an output shaft, and the focus following gear is sleeved on the outer side of the output shaft and can move on the output shaft along the axial direction of the output shaft.
The photographing device of claim 43, wherein said output shaft is circumferentially fixed to said heel Jiao Chi wheel.
The photographing device of claim 44, wherein a cross section of a mating section of said output shaft with said counter gear is non-circular; and/or the cross section of the inner hole of the following coke gear is non-circular.
The photographing device of claim 45, wherein the cross-sectional shape of the mating section of the output shaft with the counter gear comprises at least one of: square, D-shaped, regular hexagonal, diamond-shaped.
The photographing device of claim 46, wherein the cross-section of the bore of the focus follower has a shape matching the shape of the cross-section of the mating section of the output shaft.
The photographing device of claim 39, wherein the displacement adjusting means further comprises a locking means for loosely fitting the following gear with the output shaft when the following gear is displaced and for tightly fitting the following gear with the output shaft after the displacement adjustment is completed.
The photographing device of claim 48, wherein the locking device comprises:

the lock nut is sleeved on the outer side of the output shaft, and one part of the lock nut in the axial direction is used for being in threaded fit with the focus following gear;

the locking nut is arranged between the output shaft and the output shaft, and the other part of the locking nut in the axial direction is used for extruding the locking assembly;

the enclasping assembly can deform in the radial direction under the extrusion of the lock nut so as to enclasp the output shaft while the lock nut moves along the screwing direction of the focus following gear.
The imaging apparatus of claim 49, wherein the clasping assembly comprises:

the clamping ring comprises a conical part which is contacted with the inner hole wall of the lock nut, the small diameter end of the conical part is far away from the following coke gear, and the conical part is provided with a plurality of gaps which are arranged at intervals;

the tapered portion contracts in a radial direction to hug the output shaft while the lock nut moves in the screwing direction.
The imaging apparatus of claim 50, wherein the clasping assembly comprises: the anti-skid sleeve is at least arranged between the output shaft and the conical part of the holding ring.
The imaging apparatus of claim 51, wherein the material of the anti-skid sleeve comprises at least one of: rubber, foam, soft nylon.
The photographing device of claim 43, wherein the output shaft is detachably connected to the driving assembly.
The photographing device of claim 53, wherein the driving assembly includes a hollow member for mounting the output shaft, the output shaft being capable of penetrating the hollow member.
The photographing device of claim 53, wherein the driving assembly has a first mounting location and a second mounting location for mounting the output shaft, wherein the mounting opening of the first mounting location and the mounting opening of the second mounting location are facing away from each other.
The photographing device of claim 54, wherein an end of said output shaft adjacent said drive assembly is secured to said hollow member by a fastener.
The photographing device of claim 56, wherein said output shaft has a stepped surface thereon for abutting said driving assembly, said fastener and said stepped surface being located on different sides of said driving assembly, respectively.
The photographing device of claim 43, wherein the driving assembly and the output shaft have a circumferential positioning structure therebetween, the circumferential positioning structure being at least for circumferentially positioning the driving assembly and the output shaft.
The photographing device of claim 58, wherein said circumferential positioning structure comprises a protrusion provided on said driving assembly and a recess provided on said output shaft;

and/or, the circumferential positioning structure comprises a groove arranged on the driving assembly and a protrusion arranged on the output shaft.
The photographing device of claim 39, wherein the driving assembly comprises:

a power assembly for providing power;

and the transmission assembly is respectively connected with the power assembly and the focus following gear and is used for transmitting power generated by the power assembly to the focus following gear.
The camera of claim 39, wherein the drive assembly includes a housing having a securing assembly thereon for connecting the drive assembly to the body.
The imaging apparatus of claim 61, wherein the securing assembly is removably coupled to the housing.
The imaging apparatus of claim 62, wherein the housing has a post, the securing assembly being removably secured to the post.
The imaging apparatus of claim 63, wherein the fixed assembly comprises a first split, a second split, and a first force application device;

one side of the first split body is fixedly connected with one side of the second split body, the other side of the first split body and the other side of the second split body are free ends, and a clamping space for clamping the convex column is arranged between the first split body and the second split body;

the first force application device is used for applying a force to the first split body and the second split body, so that the first split body and the second split body clamp the convex column.
The photographing device of claim 64, wherein the cross section of the holding space matches the cross section of the boss.
The imaging apparatus of claim 64, wherein the first force applying means comprises a threaded fastener, the free end of the first section having a first threaded bore and the free end of the second section having a second threaded bore, the threaded fastener passing through the first threaded bore and the second threaded bore to apply a preload force to the first section and the second section.
The imaging apparatus of claim 66, wherein said first screw hole comprises an optical hole and said second screw hole comprises a threaded hole;

alternatively, the first screw hole comprises a screw hole, and the second screw hole comprises a light hole;

alternatively, the first screw hole includes a screw hole, and the second screw hole includes a screw hole.
The photographing device of claim 64, wherein the fixed assembly further comprises: a second force application device;

the second force application device is arranged on one side, far away from the first split, of the second split, and is provided with a propping piece, and the propping piece is used for propping one side, far away from the first split, of the second split so as to enable the free end of the second split to move towards the free end, close to the first split.
The imaging apparatus of claim 68, wherein said second force application device is rotatably coupled to said second sub-assembly.
The photographic device of claim 68, wherein the abutment comprises a cam structure comprising a large diameter portion and a small diameter portion;

during the rotation of the cam structure, when the large-diameter part abuts against the second split body, the distance between the free end of the second split body and the free end of the first split body is minimum, so that the fixing assembly is in a locking state.
The imaging apparatus according to claim 70, wherein the small diameter portion is capable of abutting against the second split body during rotation of the cam structure;

or in the rotation process of the cam structure, the small-diameter part and the second split body are always provided with a distance.
The imaging apparatus according to claim 70, wherein the second force application device includes an operating member coupled to the cam structure, the operating member being configured to receive an external force to rotate the cam structure.
The photographing device of claim 72, wherein the shape of the operating member comprises at least one of: wrench-shaped, knob-shaped, and pull-ring-shaped.
The photographing device of claim 68, wherein there is a buffer between the abutment member and the second sub-body, the abutment member abutting the second sub-body by abutting the buffer.
The imaging apparatus of claim 74, wherein the material of the buffer comprises at least one of: rubber, foam, soft nylon.
The heel counter according to claim 74, wherein the cushioning member is secured to the second body;

And/or, the buffer piece is fixed on the propping piece.
The utility model provides a movable platform, its characterized in that includes the carrier part that is used for connecting shooting device at least, and with shooting device complex keep away burnt ware, wherein, keep away burnt ware includes:

a drive assembly;

the focus following gear is connected with the driving assembly and used for performing rotary motion under the driving of the driving assembly;

and the displacement adjusting device is respectively connected with the driving assembly and the following coke gear and is used for adjusting the relative positions of the driving assembly and the following coke gear so that the following coke gear can move relative to the driving assembly.
The mobile platform of claim 77,

the driving assembly comprises a power assembly for providing power, and the following coke gear moves along the axial direction of the power assembly;

and/or the following focus gear moves along the axial direction of the lens of the shooting device.
The movable platform of claim 77, wherein the drive assembly is closer to a body of the camera than the tracking gear when the tracking gear is engaged with a focus ring of the lens.
The movable platform of claim 77, wherein a diameter of the tracking gear is smaller than a diameter of a focus ring of the lens.
The movable platform of claim 77, wherein the displacement adjustment device comprises an output shaft, wherein the focus follower is sleeved on the outer side of the output shaft and is capable of moving axially on the output shaft.
The mobile platform of claim 81, wherein the output shaft is circumferentially fixed to the heel Jiao Chi wheel.
The mobile platform of claim 82, wherein a cross-section of the mating segment of the output shaft that mates with the counter gear is non-circular; and/or the cross section of the inner hole of the following coke gear is non-circular.
The movable platform of claim 83, wherein the cross-sectional shape of the mating segment of the output shaft that mates with the counter gear comprises at least one of: square, D-shaped, regular hexagonal, diamond-shaped.
The movable platform of claim 83, wherein a cross-section of the bore of the focus follower has a shape that matches a shape of a cross-section of the mating section of the output shaft.
The movable platform of claim 81, wherein the displacement adjustment device further comprises a locking device for loose fitting the tracking gear to the output shaft when the tracking gear is displaced, the locking device further configured to tight fit the tracking gear to the output shaft after the displacement adjustment is completed.
The movable platform of claim 86, wherein the locking device comprises:

the lock nut is sleeved on the outer side of the output shaft, and one part of the lock nut in the axial direction is used for being in threaded fit with the focus following gear;

the locking nut is arranged between the output shaft and the locking nut, and the other part of the locking nut in the axial direction is used for extruding the locking assembly;

the enclasping assembly can deform in the radial direction under the extrusion of the lock nut so as to enclasp the output shaft while the lock nut moves along the screwing direction of the focus following gear.
The movable platform of claim 86, wherein the clasping assembly comprises:

the clamping ring comprises a conical part which is contacted with the inner hole wall of the lock nut, the small diameter end of the conical part is far away from the following coke gear, and the conical part is provided with a plurality of gaps which are arranged at intervals;

The tapered portion contracts in a radial direction to hug the output shaft while the lock nut moves in the screwing direction.
The movable platform of claim 88, wherein the clasping assembly comprises: the anti-skid sleeve is at least arranged between the output shaft and the conical part of the holding ring.
The mobile platform of claim 86, wherein the material of the anti-skid sleeve comprises at least one of: rubber, foam, soft nylon.
The mobile platform of claim 81, wherein the output shaft is detachably connected to the drive assembly.
The movable platform of claim 91, wherein the drive assembly comprises a hollow member for mounting the output shaft, the output shaft being capable of penetrating the hollow member.
The movable platform of claim 91, wherein there is a first mounting location and a second mounting location on the drive assembly for mounting the output shaft, wherein the mounting opening of the first mounting location and the mounting opening of the second mounting location face away from each other.
The movable platform of claim 91, wherein an end of the output shaft proximate the drive assembly is secured to the hollow member by a fastener.
The movable platform of claim 94, wherein the output shaft has a stepped surface thereon that abuts the drive assembly, the fastener and the stepped surface being on different sides of the drive assembly.
The movable platform of claim 81, wherein the drive assembly and the output shaft have a circumferential positioning structure therebetween, the circumferential positioning structure being at least for circumferentially positioning the drive assembly and the output shaft.
The movable platform of claim 96, wherein the circumferential positioning structure comprises a protrusion provided on the drive assembly and a groove provided on the output shaft;

and/or, the circumferential positioning structure comprises a groove arranged on the driving assembly and a protrusion arranged on the output shaft.
The movable platform of claim 77, wherein the drive assembly comprises:

a power assembly for providing power;

the transmission assembly is used for transmitting power;

the drive assembly includes at least one drive gear; alternatively, the transmission assembly includes a multi-stage transmission gear that constitutes a reduction gear train.
The movable platform of claim 77, wherein the drive assembly comprises a housing having a securing assembly thereon for mounting the drive assembly to the carrier.
The mobile platform of claim 99, wherein one side of the stationary assembly is detachably connected to the carrier; and/or the other side of the fixing component is detachably connected with the shell.
The mobile platform of claim 100, wherein the housing has a post, the securing assembly being removably secured to the post.
The mobile platform of claim 101, wherein the stationary assembly comprises a first split, a second split, and a first force application device;

one side of the first split body is fixedly connected with one side of the second split body, the other side of the first split body and the other side of the second split body are free ends, and a clamping space for clamping the convex column is arranged between the first split body and the second split body;

the first force application device is used for applying a force to the first split body and the second split body, so that the first split body and the second split body clamp the convex column.
The movable platform of claim 102, wherein a cross-section of the clamping space matches a cross-section of the post.
The movable platform of claim 102, wherein the first force applying means comprises a threaded fastener, the free end of the first segment having a first threaded bore and the free end of the second segment having a second threaded bore, the threaded fastener passing through the first threaded bore and the second threaded bore to apply a preload force to the first segment and the second segment.
The movable platform of claim 104, wherein the first screw hole comprises an optical hole and the second screw hole comprises a threaded hole;

alternatively, the first screw hole comprises a screw hole, and the second screw hole comprises a light hole;

alternatively, the first screw hole includes a screw hole, and the second screw hole includes a screw hole.
The mobile platform of claim 102, wherein the stationary assembly further comprises: a second force application device;

the second force application device is arranged on one side, far away from the first split, of the second split, and is provided with a propping piece, and the propping piece is used for propping one side, far away from the first split, of the second split so as to enable the free end of the second split to move towards the free end, close to the first split.
The movable platform of claim 106, wherein the second force application device is rotatably coupled to the second sub-assembly.
The movable platform of claim 107, wherein the abutment comprises a cam structure comprising a large diameter portion and a small diameter portion;

during the rotation of the cam structure, when the large-diameter part abuts against the second split body, the distance between the free end of the second split body and the free end of the first split body is minimum, so that the fixing assembly is in a locking state.
The movable platform of claim 108, wherein the small diameter portion is capable of abutting the second split during rotation of the cam structure;

or in the rotation process of the cam structure, the small-diameter part and the second split body are always provided with a distance.
The movable platform of claim 108, wherein the second force application device comprises an operating member coupled to the cam structure, the operating member configured to receive an external force to rotate the cam structure.
The movable platform of claim 110, wherein the shape of the operating member comprises at least one of: wrench-shaped, knob-shaped, and pull-ring-shaped.
The movable platform of claim 106, wherein there is a buffer between the abutment and the second sub-body, the abutment abutting the second sub-body by abutting the buffer.
The movable platform of claim 112, wherein the material of the cushioning member comprises at least one of: rubber, foam, soft nylon.
The movable platform of claim 112, wherein the buffer is fixed to the second sub-body;

and/or, the buffer piece is fixed on the propping piece.
The mobile platform of claim 77, wherein the mobile platform comprises a cradle head.