CN220651041U - Tripod head camera - Google Patents

Abstract

The application discloses a pan-tilt camera. The cradle head camera comprises a camera body, a base and a camera body. The camera is rotatably connected with the body and rotates relative to the body along a first axis. The plane of rotation of the cross section of the camera perpendicular to the first axis is the first plane of rotation. The body is rotatably connected with the base, and the body rotates relative to the base along a second axis which is perpendicular to the first axis. The rotation plane of the section of the machine body perpendicular to the second axis is a second rotation plane, and the first rotation plane is perpendicular to the second rotation plane. The camera and the machine body are provided with a first coil array and a first magnet array which are matched with each other at the mutually facing parts respectively so as to drive the camera and the machine body to rotate relatively. The parts of the machine body and the base, which face each other, are respectively provided with a second coil array and a second magnet array which are matched with each other so as to drive the machine body and the base to rotate relatively. Through the mode, the camera can be accurately rotated.

Description

Tripod head camera

Technical Field

The application relates to the technical field of pan-tilt, in particular to a pan-tilt camera.

Background

With the continuous development of photographic technology and requirements, the requirements for stability when photographic imaging equipment shoots are becoming higher. The camera and other devices can be mounted on the cradle head for use, so that the balance and stabilization effects on the camera are achieved. In the related art, a cradle head camera drives cradle head equipment to rotate in a motor acceleration and deceleration box mode. This approach has the technical problem of inaccurate rotation.

Disclosure of Invention

The embodiment of the application provides a cradle head camera which can realize accurate rotation of the camera.

The embodiment of the application provides a cradle head camera. The cradle head camera comprises a camera body, a base and a camera body. The camera is rotatably connected with the body and rotates relative to the body along a first axis. The plane of rotation of the cross section of the camera perpendicular to the first axis is the first plane of rotation. The body is rotatably connected with the base, and the body rotates relative to the base along a second axis which is perpendicular to the first axis. The rotation plane of the section of the machine body perpendicular to the second axis is a second rotation plane, and the first rotation plane is perpendicular to the second rotation plane. The camera and the machine body are provided with a first coil array and a first magnet array which are matched with each other at the mutually facing parts respectively so as to drive the camera and the machine body to rotate relatively. The parts of the machine body and the base, which face each other, are respectively provided with a second coil array and a second magnet array which are matched with each other so as to drive the machine body and the base to rotate relatively.

The beneficial effects of this application are: in contrast to the prior art, the camera is mounted on the body by rotating the body along the second axis relative to the base, so that the camera can also rotate relative to the base, and the cradle head camera can balance and stabilize the camera in the second plane perpendicular to the second axis. Further, the camera can rotate along a first axis perpendicular to the second axis relative to the body, so that the cradle head camera can balance and stabilize the camera in a first plane perpendicular to the first axis. Since the first axis and the second axis are perpendicular, rotation of the camera relative to the body and the mount complementarily interferes. In other words, the camera can rotate relatively on two independent axes relative to the base, so that the cradle head camera can control the rotation of the camera in two directions, and balance and stability of the camera in space are realized. The mode of driving the camera to rotate along the first axis and the second axis by the mode of the magnet array and the coil array has no problem of gear clearance, does not rotate virtual position, does not need a software algorithm to compensate, and rotates more accurately, more rapidly and more quickly. And the camera is driven to rotate in the mode, so that less noise is generated, and the interference in pickup can be reduced.

Drawings

Fig. 1 is a schematic structural diagram of a pan-tilt camera according to the present application;

FIG. 2 is a schematic cross-sectional view of the pan-tilt camera of FIG. 1;

FIG. 3 is a schematic view of a part of the camera body housing and camera housing of the pan-tilt camera of FIG. 1 after being hidden;

FIG. 4 is a schematic diagram of an exploded view of the pan-tilt camera of FIG. 1;

FIG. 5 is a schematic view of the fuselage of FIG. 4 at another angle;

fig. 6 is a schematic view of the structure of the base shown in fig. 4.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying 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 one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

With the continuous development of photographic technology and requirements, the requirements for stability when photographic imaging equipment shoots are becoming higher. The camera and other devices can be mounted on the cradle head for use, so that the balance and stabilization effects on the camera are achieved. In the related art, the existing electric pan-tilt camera generally uses a combination of an acceleration and deceleration box of a stepping motor to drive the pan-tilt to rotate, so that noise is very loud when the pan-tilt rotates, and experience is affected. And the electrode acceleration and deceleration box can produce the noise in the in-process of drive, and the noise also can be by the microphone pickup of camera lead to the noise of motor when monitoring to cover the people's voice in the environment, alarm sound etc.. And because the reduction gearbox rotates through the gear, the existence of the gear leads to a certain rotation clearance of the tripod head, thus the problem of inaccurate rotation can be caused, and the rotation clearance of the gear is often compensated by a software algorithm during driving control. And the stepping motor is driven to rotate through an electric signal with a certain frequency, step loss can be caused in the process due to the fact that the speed is too high, the torque is too large, or the signal output is not in place, and the like, the cradle head cannot rotate to a designated position, no position feedback exists, and after the cradle head rotates for a period of time, the cradle head system is disordered, and the cradle head can continue to work after the cradle head system is reset by executing a return-to-zero action. In order to improve the above technical problems, the present application may provide the following embodiments.

Referring to fig. 1 and 2, an exemplary structure of a pan-tilt camera 10 is presented. The pan-tilt camera 10 includes a camera 11, a body 12, and a cradle 13. The camera 11 includes a housing 115, with a lens assembly 111 and a sensor assembly (not shown, but not labeled) disposed within the housing 115. The lens assembly 111 can collect light information of the external environment, and transmit the light into the housing 115 after optical transformation such as focusing. The light enters the housing 115 and then impinges upon the sensor assembly. The sensor assembly is capable of converting an optical signal into an electrical signal to transmit or save a photographed image.

The camera 11 is rotatably connected to the body 12, and the camera 11 rotates along a first axis A1 relative to the body 12. The rotation plane of the cross section of the camera 11 perpendicular to the first axis is a first rotation plane. The body 12 is rotatably connected to the base 13, and the body 12 rotates relative to the base 13 along a second axis A2, the second axis A2 being perpendicular to the first axis A1. The plane of rotation of the cross section of the body 12 perpendicular to the second axis is a second plane of rotation, the first plane of rotation being perpendicular to the second plane of rotation. The camera 11 is rotatable relative to the body 12 along a first axis A1 perpendicular to the second axis A2, so that the pan-tilt camera 10 can balance and stabilize the camera 11 in a first plane perpendicular to the first axis A1. Since the first axis A1 and the second axis A2 are perpendicular, the rotation of the camera 11 relative to the body 12 and the base 13 is not interfered with each other. The body 12 can rotate along the second axis A2 relative to the base 13, and the camera 11 is mounted on the body 12, so that the camera 11 can also rotate relative to the base 13, and further the pan-tilt camera 10 can balance and stabilize the camera 11 in a second plane perpendicular to the second axis A2. In other words, the camera 11 can rotate relatively to the base 13 on two independent axes, so that the pan-tilt camera 10 can control the rotation of the camera 11 in two directions to balance and stabilize the camera 11 in space.

Specifically, mutually facing portions of the camera 11 and the body 12 are provided with a first coil array 121 and a first magnet array 113, respectively, which are mutually mated to drive the camera 11 and the body 12 to rotate relative to each other. Wherein, the camera 11 is provided with a first magnet array 113, and the body 12 is provided with a first coil array 121; the first coil array 121 may be provided on the camera 11, and the first magnet array 113 may be provided on the body 12, which is not particularly limited herein. The body 12 and the base 13 are provided with a second coil array 122 and a second magnet array 131, respectively, which are matched with each other, at positions facing each other to drive the body 12 and the base 13 to rotate relatively. Wherein, the body 12 is provided with a second coil array 122, and the base 13 is provided with a second magnet array 131; the body 12 may be provided with a second magnet array 131, and the base 13 may be provided with a second coil array 122, which is not particularly limited herein. The manner of driving the camera 11 to rotate along the first axis A1 and the second axis A2 by means of the magnet array and the coil array does not have the so-called gear clearance problem, does not rotate the virtual position, does not need to be compensated by a software algorithm, and rotates more accurately, more rapidly and more quickly. And the camera 11 is driven to rotate in the above-described manner with less noise, the disturbance at the time of sound pickup can be reduced.

Referring to fig. 2, in an embodiment, the body 12 includes a housing 126, a first coil array 121 and a second coil array 122 are disposed in the housing 126, the first coil array 121 is disposed on a side of the housing 126 near the camera 11, and the second coil array 122 is disposed on a side of the housing 126 near the base 13. In other words, the portion of the body 12 facing the camera 11 is provided with the first coil array 121, and the portion of the camera 11 facing the body 12 is provided with the first magnet array 113. The portion of the body 12 facing the base 13 is provided with a second coil array 122, and the portion of the base 13 facing the body 12 is provided with a second magnet array 131. The first coil array 121 and the first magnet array 113 are disposed in cooperation with each other, and the second coil array 122 and the second magnet array 131 are disposed in cooperation with each other. Because the coil arrays need to be connected to the circuit to generate the electromagnetic field, the first coil array 121 and the second coil array 122 are arranged on the main body 12, so that the circuit and the wiring for driving the coils to generate the magnetic field can be arranged in the main body 12 in a centralized manner, which is beneficial to the simplification of the structure and the reduction of the volume of the pan-tilt camera 10.

In one embodiment, a gesture detection device 112 is disposed in the camera 11 to detect whether the camera 11 is rotated to a preset position. The posture detecting means 112 may detect the horizontal and vertical angles at which the camera 11 rotates. And feeds back the rotation angle to the control unit of the pan-tilt camera 10, so that when the camera 11 is required to rotate to a preset position, whether the pan-tilt camera 10 rotates in place can be detected by the gesture detection device 112, thereby realizing closed-loop control of the rotation of the camera 11.

In an embodiment, the axis of the lens assembly 111 in the camera 11 is perpendicular to the first axis A1. The axial direction of the lens assembly 111 is the view direction of the camera 11, and the view direction of the camera 11 can be directly influenced by the rotation process of the camera 11 relative to the body 12 by setting the first axis A1 to be perpendicular to the axial direction of the lens assembly 111, so that the view direction of the camera 11 can be balanced and stabilized by the rotation of the camera 11 relative to the body 12.

An exemplary description of the manner in which the first coil array 121 and the first magnet array 113 cooperate is made below:

referring to fig. 2 and 3, fig. 2 is a cross-sectional view of the pan-tilt camera 10, and fig. 3 is a schematic view of the pan-tilt camera 10 concealing the housing 115 of the camera 11 and the housing 126 of the body 12. In an embodiment, the first coil array 121 includes a plurality of first coils, and the plurality of first coils are arranged in a circular arc shape with the first axis A1 as a central axis. The first magnet array 113 includes a plurality of first magnets arranged in a circular arc shape with the first axis A1 as a central axis. The arrangement is that different magnetic fields are generated in the first coil through the cradle head control unit, so that driving force required by rotation of the camera 11 relative to the body 12 can be generated between the first coil and the first magnet, and the camera 11 is driven to rotate to a preset position relative to the body 12, so that balance and stability of the camera 11 on the first axis A1 are maintained. The first coil may be a three-phase winding or a five-phase winding, and is not particularly limited.

In one embodiment, the first coil array 121 and the first magnet array 113 are disposed in a first plane at concentric arc intervals, with the first axis A1 being perpendicular to the first plane. By the arrangement, the relative distances between different coils and the magnets can be kept consistent in the process of rotating the camera 11 relative to the body 12, so that the force for driving the camera 11 to rotate can be consistent, and the stability of the relative rotation of the camera 11 is improved.

In an embodiment, referring to fig. 2 and 3, the first magnets are arranged in a semicircle with the first axis A1 as a central axis. So configured, on the one hand, the driving force of the first coil array 121 on the first magnet array 113 can be ensured, and on the other hand, the first magnet array 113 can be ensured to have less interference with the sensor assembly and the lens assembly 111 within the camera 11. The first coils are sequentially arranged at intervals in a circular arc shape, thereby generating a driving force to the first magnet array 113. In other words, the rotation of the camera 11 relative to the body 12 is not performed by the camera 11 in the omni-direction 360 relative to the body 12 because neither the first magnet array 113 nor the first coil array 121 are circumferentially distributed. However, the arrangement of the elements in the camera 11 is less affected by the first magnet array 113 or the first coil array 121, and due to the existence of the body 12, a certain field of view blind area exists in the camera 11, and the first coil array 121 and the first magnet array 113 can be disposed close to the body 12, that is, in the aforementioned field of view blind area, so that the organic combination of the driving mode and the view finding range of the camera 11 is realized.

Further, the arrangement length of the first magnet array 113 provided to the camera 11 is longer than the arrangement length of the first coil array 121 provided to the body 12. Since the first coil array 121 cannot be arranged in a considerable amount around the camera 11 due to the volume limitation of the body 12, the arrangement length of the first magnet array 113 is longer than that of the first coil array 121, so that the camera 11 can have a sufficient relative rotation angle with respect to the body 12, and the first coil array 121 does not occupy an excessive space of the body 12, which is beneficial to the volume reduction of the pan-tilt camera 10. In other words, the longer one of the first coil array 121 and the first magnet array 113 determines the effective rotation angle of the camera 11 with respect to the body 12, and the camera 11 can have a larger effective rotation angle in the case that the pan-tilt camera 10 has a smaller body 12 by the length of the first magnet array 113 disposed in the camera 11 being smaller than the length of the first coil array 121 in the body 12.

Wherein the magnetic poles of the first magnets are alternately arranged, the magnetic pole directions of the first magnets in the first magnet array 113 are perpendicular to the first axis A1, and the orientations of the magnetic poles are alternately arranged in the arrangement direction of the first magnets. The axial direction of the first coils in the first coil array 121 is perpendicular to the first axis A1. Wherein, the alternating arrangement means that the magnetic poles of one of the adjacent two first magnets facing the first axis A1 are opposite to the magnetic poles of the other magnet facing the first axis A1. The first magnets thus arranged can reduce the magnetic leakage phenomenon, and improve the efficiency and performance of driving the first magnet array 113 by the first coil array 121.

Referring to fig. 4, in an embodiment, a receiving cavity 123 for receiving the camera 11 is concavely formed in the body 12. The camera 11 is provided with a first pivot 114, and the inner wall of the accommodating chamber 123 is provided with a first pivot hole 124, and the first pivot 114 and the first pivot hole 124 are in a running fit. Wherein, the axis of the first rotating shaft 114 coincides with the first axis A1. The recessed receiving cavity 123 in the body 12 provides stable mechanical support for the camera 11, thereby enabling stable rotation of the camera 11 relative to the body 12. Optionally, the accommodating cavity 123 of the body 12 is hemispherical, and the shape of the housing 115 of the camera 11 is spherical. So arranged, the risk of interference of the rotation of the camera 11 relative to the body 12 is less, and the hemispherical receiving chamber 123 can also provide a more stable mechanical support for the spherical camera 11.

An exemplary description of the manner in which the second coil array 122 and the second magnet array 131 are mated is provided below:

referring to fig. 5 and fig. 6, in an embodiment, the second coil array 122 includes a plurality of second coils, and the plurality of second coils are arranged in a circular arc shape with the second axis A2 as a central axis; the second magnet array 131 includes a plurality of second magnets, and the plurality of second magnets are arranged in a circular arc shape with the second axis A2 as a central axis. The cradle head control unit is used for controlling the second coil to generate different magnetic fields, so that driving force required by rotation of the body 12 relative to the base 13 can be generated between the second coil and the second magnet, and the camera 11 is driven to rotate to a preset position relative to the body 12, so that balance and stability of the camera 11 on the second axis A2 are maintained. The second coil may be a three-phase winding or a five-phase winding, and is not particularly limited.

In one embodiment, the second coil array 122 is disposed in a second plane and the second magnet array 131 is disposed in a third plane spaced from the second plane, the second axis A2 being perpendicular to the second plane and the third plane. In other words, the second magnet array 131 and the second coil array 122 are arranged in different planes parallel to each other. By this arrangement, the second magnet array 131 and the second coil array 122 can be arranged at intervals in the longitudinal direction of the body 12, so that the space of the body 12 is fully utilized to reduce the volume of the pan-tilt camera 10.

In an embodiment, the second magnets are arranged in a circle with the second axis A2 as a central axis, and the second coils are sequentially arranged in a circle at intervals. By the arrangement, the body 12 can realize 360-degree omni-directional rotation relative to the base 13, so that the camera 11 can also rotate omni-directionally relative to the base 13, the rotatable range of the camera 11 relative to the base 13 is enlarged, and the stabilizing capability of the cradle head camera 10 is improved.

Wherein the magnetic poles of the second magnets are alternately arranged, the magnetic pole direction of the second magnets in the second magnet array 131 is parallel to the first axis A1, and the orientation of the magnetic poles is alternately arranged in the arrangement direction of the magnets, and the axial direction of the second coils in the second coil array 122 is parallel to the first axis A1. Taking the second magnet array 131 disposed on the base 13 as an example, the adjacent two second magnets are alternately disposed, where one of the magnets faces the main body 12 and the other magnet faces the main body 12. The first magnets thus arranged can reduce the magnetic leakage phenomenon, and improve the efficiency and performance of driving the first magnet array 113 by the first coil array 121.

In an embodiment, the middle part of the base 13 is convexly provided with a second rotating shaft 132, the middle part of the side of the body 12 facing the base 13 is provided with a second pivot hole 125 in a rotating fit with the second rotating shaft 132, and the axis of the second rotating shaft 132 coincides with the second axis A2. Optionally, the housing 126 and the base 13 enclose a mounting space, and the second coil array 122 and the second magnet array 131 are located in the mounting space. By this arrangement, the running fit of the body 12 and the base 13 can be made more stable, and the installation space can also protect the second magnet array 131 and the second coil array 122 therein.

The foregoing is only examples of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.

Claims (10)

1. A pan-tilt camera, comprising:

a camera;

the camera is rotationally connected with the machine body, rotates relative to the machine body along a first axis, and a rotation plane of a section of the camera perpendicular to the first axis is a first rotation plane;

the machine body is rotationally connected with the base, the machine body rotates along a second axis relative to the base, the second axis is perpendicular to the first axis, a rotating plane of a section of the machine body perpendicular to the second axis is a second rotating plane, and the first rotating plane is perpendicular to the second rotating plane;

the camera and the machine body are provided with a first coil array and a first magnet array which are matched with each other at the mutually facing parts respectively so as to drive the camera and the machine body to rotate relatively;

the machine body and the base are provided with a second coil array and a second magnet array which are matched with each other at the mutually facing positions respectively so as to drive the machine body and the base to rotate relatively.

2. The pan-tilt camera of claim 1, wherein:

the first coil array comprises a plurality of first coils which are distributed in an arc shape by taking the first axis as a central axis; the first magnet array comprises a plurality of first magnets which are distributed in a circular arc shape by taking the first axis as a central axis;

the second coil array comprises a plurality of second coils which are distributed in an arc shape by taking the second axis as a central axis; the second magnet array comprises a plurality of second magnets which are distributed in an arc shape by taking the second axis as a central axis.

3. The pan-tilt camera of claim 2, wherein:

the first coil array and the first magnet array are arranged in a first plane at intervals in a concentric arc shape, and the first axis is perpendicular to the first plane; the second coil array is disposed in a second plane and the second magnet array is disposed in a third plane spaced from the second plane, the second axis being perpendicular to the second plane and the third plane.

4. The pan-tilt camera of claim 2, wherein:

the part of the body facing the camera is provided with the first coil array, and the part of the camera facing the body is provided with the first magnet array; the part of the machine body facing the base is provided with the second coil array, and the part of the base facing the machine body is provided with the second magnet array; the first coil array and the first magnet array are mutually matched, and the second coil array and the second magnet array are mutually matched.

5. The pan-tilt camera of claim 2, wherein:

the first magnets are arranged in a semicircular shape by taking the first axis as a central axis, and magnetic poles of the first magnets are alternately arranged; the first coils are sequentially arranged at intervals to form circular arcs;

the second magnets are arranged in a round shape by taking the second axis as a central axis, and the magnetic poles of the second magnets are alternately arranged; the second coils are sequentially arranged at intervals to form a circle.

6. A pan-tilt camera according to any of claims 1-3, wherein:

the body is recessed to form a containing cavity for containing the camera; the camera is provided with a first rotating shaft, the inner wall of the accommodating cavity is provided with a first pivoting hole, and the first rotating shaft is in running fit with the first pivoting hole; wherein, the axis of first pivot with first axis coincidence.

7. A pan-tilt camera according to any of claims 1-3, wherein:

the base is convexly provided with a second rotating shaft, one side of the machine body, which faces the base, is provided with a second pivoting hole in running fit with the second rotating shaft, and the axis of the second rotating shaft coincides with the second axis.

8. The pan-tilt camera of claim 1, wherein:

the camera comprises a lens assembly, wherein the first axis and the axis of the lens assembly are perpendicular to each other.

9. A pan-tilt camera according to any of claims 1-3, wherein:

the arrangement length of the first coil array or the first magnet array arranged on the camera is longer than that of the first coil array or the first magnet array arranged on the body.

10. The pan-tilt camera of claim 1, wherein:

and a gesture detection device is arranged in the camera to detect whether the camera rotates to a preset position.