CN114125227B

CN114125227B - Tripod head camera

Info

Publication number: CN114125227B
Application number: CN202111388601.0A
Authority: CN
Inventors: 何明松
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2023-05-26
Anticipated expiration: 2041-11-22
Also published as: CN114125227A

Abstract

The application provides a pan-tilt camera. The cradle head camera comprises a cradle head rear shell, and a motor cabin; the motor is accommodated in the motor cabin and comprises a motor shaft extending out of the motor cabin; and the cradle head side cover assembly comprises a cradle head side cover, a torsion spring and a cradle head fixing frame, wherein the cradle head side cover is assembled on the cradle head rear shell and seals the motor cabin, the cradle head fixing frame and the cradle head side cover are oppositely arranged along the extending direction of the motor shaft, and the torsion spring is assembled between the cradle head side cover and the cradle head fixing frame. This application installs the torsional spring between cloud platform mount and cloud platform side cap to be provided with the track groove at the cloud platform mount, the end cartridge is adjusted to the moment of torsion in the track groove, through the position at the outside adjustment moment of torsion adjustment end of cloud platform side cap subassembly, produces the pretightning force that acts on motor output shaft, has reduced the installation degree of difficulty simultaneously to reach the pretightning purpose.

Description

Tripod head camera

Technical Field

The application relates to the technical field of shooting, in particular to a tripod head camera.

Background

In the current network information age, video images play an extremely important role, and are the most important tools and means for people to record information and communicate in the current society because of the advantages of intuitiveness, reality, convenient propagation and practicality and three-dimensional property.

The cradle head camera is provided with a device for bearing the camera to rotate, can scan and monitor a large range, expands the monitoring range of the camera, and has more application scenes. The motor is arranged in the cradle head, so that the steering of the camera can be controlled, because the camera needs precise transmission, the clearance of a gear pair in the motor needs to be eliminated, people often adopt a scheme of adding a pre-tightening device on an output shaft of the motor, a common pre-tightening device is provided with a torsion spring, the pre-tightening force is changed by utilizing the initial rotation angle of the common pre-tightening device, the accurate refinement can be realized, certain advantages are realized, but the problem that how to conveniently and rapidly complete the installation of a corresponding matching piece under the reaction generated by the initial rotation angle is always relatively troublesome is solved.

Disclosure of Invention

An object of the application is to provide a cloud platform camera, can reduce the installation degree of difficulty of torsional spring.

A pan-tilt camera, comprising:

the cradle head rear shell comprises a motor cabin;

the motor is accommodated in the motor cabin and comprises a motor shaft extending out of the motor cabin; and

The cradle head side cover assembly comprises a cradle head side cover, a torsion spring and a cradle head fixing frame, wherein the cradle head side cover is assembled on the cradle head rear shell and seals the motor cabin;

the holder fixing frame comprises a track groove, the track groove comprises an initial end and a working end which are communicated, the torsion spring comprises a fixed end and a torque adjusting end, the fixed end is fixedly connected with the holder side cover, the torque adjusting end is inserted into the track groove and can move from the initial end to the working end through external force, when the torque adjusting end is mounted to the initial end, the torsion spring is in a free state, and when the torque adjusting end is mounted to the working end, the torsion spring generates torque.

Optionally, between the initial end and the working end, the track groove has at least one position, and a linear distance between the position and the initial end is greater than a linear distance between the working end and the initial end.

Optionally, the track groove is formed by connecting a plurality of sections of arc grooves in sequence, the working end and the initial end are positioned in the same arc, and the maximum curvature of the arc where the track groove is positioned is greater than the curvature of the arc where the working end and the initial end are positioned.

Optionally, the cradle head side cover includes a first shaft hole, the cradle head fixing frame includes a second shaft hole, the first shaft hole is coaxial with the second shaft hole, the motor shaft extends out of the first shaft hole and the second shaft hole, and the initial end and the working end are arranged on the same circumference taking the axis of the motor shaft as the center of a circle.

Optionally, the torsional spring includes the circular spiral structure that forms by the coiling of spring wire, the one end of spring wire is the stiff end, the other end is the moment of torsion regulation end, circular spiral structure's axis with the axis coincidence of motor shaft, circular spiral structure follows the radial flexible deformation of motor shaft, the motor shaft passes in proper order cloud platform side cap, circular spiral structure and cloud platform mount, with cloud platform mount fixed connection.

Optionally, the cradle head side cover includes facing towards the holding chamber of second axle hole opening and forms in the inboard limit structure of holding the central region in chamber, the torsional spring accept in hold the chamber, hold the chamber with the track groove intercommunication, circular spiral structure cover is located the outside of inboard limit structure, radially flexible deformation along oneself, the peripheral space of inboard limit structure forms to circular spiral structure's deformation space.

Optionally, the cradle head side cover further comprises a plurality of outer side limiting structures arranged in the accommodating cavity, wherein the outer side limiting structures are arranged around the inner side limiting structures and distributed on the same circumference taking the axis of the motor shaft as the center of a circle.

Optionally, the working ends are provided with a plurality of working ends, the distances between the working ends and the initial ends are different, and when the torque adjusting ends are installed on different working ends, the torques generated by the torsion springs are different.

Optionally, the working ends are all arranged on the same circumference taking the axle center of the motor shaft as the center of a circle.

Optionally, the track groove includes a groove portion that connects the initial end and the plurality of working ends, the groove portion includes a main body groove portion and a plurality of branch groove portions formed by branching from the end of the main body groove portion, and the end of the plurality of branch groove portions forms each of the working ends; or (b)

The plurality of working ends comprise a first working end and a second working end, the track groove comprises a first groove part communicated with the initial end and the first working end and a second groove part communicated with the initial end and the second working end, and the first groove part is separated from the second groove part.

The technical scheme provided by the application can at least achieve the following technical effects:

this application installs the torsional spring between cloud platform mount and cloud platform side cap to be provided with the track groove at the cloud platform mount, the end cartridge is adjusted to the moment of torsion in the track groove, through the position at the outside adjustment moment of torsion adjustment end of cloud platform side cap subassembly, produces the pretightning force that acts on motor output shaft, has reduced the installation degree of difficulty simultaneously to reach the pretightning purpose.

Drawings

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

FIG. 2 is an exploded view of a pan-tilt camera according to the present application;

FIG. 3 is an exploded view of a cradle head side cover assembly of the present application;

fig. 4 is a schematic diagram illustrating the cooperation of the pan-tilt-side cover assembly according to the present application;

fig. 5 is a schematic structural view of a holder of the present application;

fig. 6 is a schematic diagram illustrating the cooperation between the pan-tilt-side cover assembly and the motor according to the present application;

FIG. 7 is a schematic view of a track groove;

FIG. 8 is a schematic diagram of a track groove of the present application;

fig. 9 is a schematic diagram of a track groove of the present application.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus consistent with some aspects of the present application as detailed in the accompanying claims.

The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "plurality" means two or more. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, fig. 1 is a schematic perspective view of a pan-tilt camera 10 according to an exemplary embodiment of the present application. Fig. 2 is an exploded view of the pan-tilt camera 10.

The embodiment provides a pan-tilt camera 10, which comprises a pan-tilt front cover 11, a pan-tilt front end assembly 12, a pan-tilt rear shell 13, a pan-tilt side cover assembly 14 and a motor 15. The front holder cover 11 is located at the front end of the rear holder housing 13 and is fixedly connected with the rear holder housing 13, and the front holder cover 11 is formed with a receiving cavity 16 for receiving the front holder end assembly 12. The cradle head rear shell 13 comprises a motor cabin 131, the motor 15 is arranged in the motor cabin 131, the motor 15 comprises a motor shaft 151, and the motor shaft 151 extends out of the motor cabin 131; the cradle head side cover assembly 14 is assembled on the side part of the cradle head rear shell 13, the cradle head side cover assembly 14 comprises a cradle head side cover 141, a torsion spring 142 and a cradle head fixing frame 143, the cradle head side cover 141 and the cradle head fixing frame 143 are oppositely arranged along the extending direction of the motor shaft 151, the torsion spring 142 is assembled between the cradle head side cover 141 and the cradle head fixing frame 143, the cradle head side cover 141 is fixedly connected with the cradle head rear shell 13, and the motor cabin 131 is sealed, dust, liquid and the like are prevented from entering the motor cabin, and normal operation of the motor 15 is affected.

Referring to fig. 3 and 4, the holder 143 includes a track groove 1431, the track groove 1431 includes an initial end 14311 and a working end 14312 that are connected, and an extending path of the track groove 1431 is not limited. The torsion spring 142 includes a fixed end 1422 and a torque adjustment end 1423, the fixed end 1422 is fixedly connected with the cradle head side cover 141, the torque adjustment end 1423 is inserted into the track groove 1431, the torque adjustment end 1423 can move from the initial end 14311 to the working end 14312 under the action of external force, when the torque adjustment end 1423 is mounted to the initial end 14311, the torsion spring 142 is in a free state, and when the torque adjustment end 1423 is mounted to the working end 14312, the torsion spring 142 generates torque.

The torque adjusting end 1423 of the torsion spring 142 is inserted into the initial end 14311 of the track groove 1431, then the torque adjusting end 1423 slides to the working end 14312 along the track groove 1431 under the action of external force and is fixed at the working end 14312, one end of the torsion spring 142 is fixed, the other end is rotated, the torsion spring 142 sleeved on the motor shaft 151 contracts and deforms along the radial direction of the motor shaft 151, and at this time, the torsion spring 142 generates a restoring free torque; and torsional spring 142 with cloud platform mount 143 fixed connection, the moment of torsion that torsional spring 142 produced will act on cloud platform mount 143, motor shaft 151 with cloud platform mount 143 fixed connection, then cloud platform mount 143 will the moment of torsion that torsional spring 142 produced is transmitted to motor shaft 151, as the pretightning force that pretightning structure produced, and then reaches the elimination the inside gear fit clearance of motor 15. Therefore, after the holder fixing frame 143 and the holder side cover 141 are fixedly installed, the position of the torque adjusting end 1423 is adjusted outside the holder side cover assembly 14, so as to generate a pre-tightening force acting on the motor shaft 151, thereby achieving the pre-tightening purpose. In addition, by providing the track groove 1431, the rotation angle of the torque adjusting end 1423 can be set after the corresponding matching piece is installed, so that the torsion spring 142 is prevented from being installed under the condition of generating restoring force, and the problem that the torsion spring 142 is difficult to install is effectively solved.

In some embodiments, the track groove 1431 penetrates the holder fixing frame 143 along the extending direction of the motor shaft 151, the torque adjusting end 1423 penetrates the initial end 14311 of the holder fixing frame 143, at this time, after the holder fixing frame 143 and the motor shaft 151 are fixed, the torsion spring is pulled to move to the working end 14312 along the track groove 1431, the torsion spring 142 is gradually tensioned, and the torsion spring 142 contracts toward the axis under the action of the restoring force, so that the torsion spring is clamped at the working end 14312 of the track groove 1431 to achieve the purpose of pre-tightening. The process does not require any disassembly of the structural components, and the position of the working end 14312 is defined by the action of the track groove 1431 and the restoring force retraction of the torsion spring 142 after movement. In addition, at the initial end 14311, an external force directly acts on the torque adjusting end 1423 extending out of the holder fixing frame 143, so that the external force is convenient to apply, and the difficulty in mounting the torsion spring 142 to the working end 14312 is reduced.

In some embodiments, the specific fixing manner of the motor shaft 151 and the holder fixing frame 143 is not limited, and screw fixation, interference connection, key connection, etc. may be adopted. In some embodiments, the fixing end 1422 of the torsion spring 142 is not limited to be fixedly connected with the pan-tilt side cover 141, a fixing groove 1411 may be formed in the pan-tilt side cover 141, a screw hole 14111 is formed in the fixing groove 1411, the fixing end 1422 of the torsion spring 142 is wound in a circular shape and placed in the fixing groove 1411, the screw penetrates through the circular center of the fixing end 1422, the screw hole 14111 is screwed in, and a screw cap of the screw is tightly pressed on the surface of the fixing end 1422, so that the fixing end 1422 is fixed on the pan-tilt side cover 141, and the fixing device has the advantages of reliability in fixing and convenience in disassembly.

Referring to fig. 5, in some embodiments, in order to avoid the torque adjustment end 1423 from disengaging the working end 14312 under the restoring force of the torsion spring 142, at least one position 14313 is located in the track groove 1431 between the initial end 14311 and the working end 14312 which are disposed in communication, and the linear distance between the position 14313 and the initial end 14311 is greater than the linear distance between the initial end 14311. So configured, when the external force slides the torque adjusting end 1423 from the initial end 14311 to the working end 14312 along the track groove 1431, the circular spiral structure 1421 of the torsion spring 142 is shrunk and deformed, and after the external force is removed, the torque in the circular spiral structure 1421 drives the torsion spring 142 to restore to the free state, if the distance between the position 14313 of the track groove 1431 and the initial end 14311 is greater than the linear distance between the working end 14312 and the initial end 14311, the torsion spring 142 must reach the position 14313, at this time, the torsion spring 142 is deformed more, and a larger torque is generated inside, but because no external force acts, the torsion spring 142 cannot reach a certain position 14313 under the action of the external force, so that it can be ensured that the torsion spring 142 is fixed on the working end 14312. In this embodiment, the shape of the track groove 1431 is used to achieve the purpose of fixing the torque adjusting end 1423, so that the torque adjusting end 1423 is prevented from falling off, and the structure is simple, the manufacture is convenient, and no additional fixing device is required.

Referring to fig. 5 and 6, in some embodiments, the holder side cover 141 includes a first shaft hole 1412, the holder fixing frame 143 includes a second shaft hole 1432, the first shaft hole 1412 is coaxial with the second shaft hole 1432, the motor shaft 151 extends out of the first shaft hole 1412 and the second shaft hole 1432, and the initial end 14311 and the working end 14312 are disposed on the same circumference with the shaft center of the motor shaft 151 as a center of a circle.

The motor shaft 151 sequentially passes through the first shaft hole 1412 and the second shaft hole 1432, and the initial end 14311 and the working end 14312 are disposed on the same circumference with the second shaft hole 1432 as a center, so that the initial end 14311 and the working end 14312 are disposed on the same circumference with the shaft center of the motor shaft 151 as a center. By this arrangement, the torsion spring 142 is not deformed in the direction of the center of the circle at the initial end 14311 and the working end 14312, the torque is not affected in the circumferential direction, the recovery of the torsion spring 142 is not affected, the torsion spring 142 and the motor shaft 151 are not radially displaced by taking the motor shaft 151 as the center of the circle, and the torsion spring 142 maintains a reliable working state.

With continued reference to fig. 6, in some embodiments, the torsion spring 142 includes a circular helical structure 1421 coiled from spring wire, the fixed end 1422 is led out from one end of the circular helical structure 1421, the torque adjustment end 1423 is led out from the other end of the circular helical structure 1421, and the axis of the circular helical structure 1421 coincides with the axis of the motor shaft 151. The circular spiral structure stretches and deforms along the radial direction of the motor shaft 151, and the motor shaft 151 sequentially passes through the cradle head side cover 141, the circular spiral structure 1421 and the round platform fixing frame 143 and is fixedly connected with the cradle head fixing frame 143.

Because the motor shaft 151 is fixedly connected with the holder fixing frame 143, the torque of the torsion spring 142 acts on the holder fixing frame 143; the circular spiral structure 1421 coincides with the axis of the motor shaft 151, so that the circular spiral structure 1421 is sleeved on the motor shaft 151 and is located at the center, thereby avoiding torsion deviation after the torsion spring 142 is stretched or compressed, and ensuring that the cradle head fixing frame 143 moves stably under the action of the torsion spring 142.

Referring to fig. 6, in some embodiments, the holder side cover 141 includes a receiving cavity 1413 facing the second axial hole 1432 and an inner limit structure 1414 formed in a central area of the receiving cavity 1413, that is, the receiving cavity 1413 faces the holder fixing frame 143, the inner limit structure 1414 is protruding from a bottom of the holder side cover 141 into the receiving cavity 1413, the torsion spring 142 is received in the receiving cavity 1413, the receiving cavity 1413 is in communication with the track groove 1431, the circular spiral structure 1421 is sleeved outside the inner limit structure 1414, the torque adjusting end is inserted into the track groove 1431 from the receiving cavity 1413, and the circular spiral structure 1421 is elastically deformed in a radial direction, and a peripheral space of the inner limit structure 1414 is formed as a deformation space of the circular spiral structure 1421.

The circular spiral structure 1421 is sleeved on the inner limit structure 1414, so that the radial inward shrinkage deformation of the circular spiral structure 1421 can be controlled, the diameter of the inner limit structure 1414 is reasonably arranged according to actual requirements, the radial inward maximum deformation is controlled, and the circular spiral structure 1421 can be prevented from excessively deforming and interfering with the motor shaft 151. When the circular spiral structure 1421 is deformed to be tightly attached to the inner limit structure 1414, the inner limit structure 1414 further plays a role in positioning the circular spiral structure 1421, preventing the circular spiral structure from tilting, and generating radial force to affect the pre-tightening effect. In some embodiments, the shape of the inner limiting structure 1414 may be cylindrical, rectangular, etc., to achieve the same purpose.

In some embodiments, the holder side cover 141 further includes a plurality of outer limit structures 1415 disposed in the accommodating cavity 1413, where the plurality of outer limit structures 1415 are disposed around the inner limit structure 1414 and are distributed on the same circumference with the axis of the motor shaft 151 as the center of the circle. The outer limit structure 1415 is disposed on the inner wall of the accommodating cavity 1413 around the inner limit structure 1414, and the inner limit structure 1414 and the outer limit structure 1415 together form a deformation space of the circular spiral structure 1421, where the deformation space can be matched with the external dimension of the circular spiral structure 1421 in a free state, so as to meet the requirement of the installation space of the torsion spring 142. The outer limit structure 1415 is disposed on the same circumference with the axis of the motor shaft 151 as the center of the circle, and can limit the installation position of the torsion spring 142, so that the axis of the circular spiral structure 1421 coincides with the motor shaft 151, and the torque deviation of the torsion spring 142 after stretching is avoided, thereby ensuring that the holder fixing frame 143 can work stably under the torque action of the torsion spring 142.

In some embodiments, the outer limiting structure 1415 may be a semi-cylindrical shape, a conical shape, a combination thereof, or the like, and the outer limiting structure 1415 may protrude from the inner wall of the receiving cavity 1413 and may be formed on the inner wall of the receiving cavity 1413 by an integral molding process, but is not limited thereto.

Referring to fig. 7 and 8, in some embodiments, a plurality of working ends 14312 are disposed on the holder 143, and the plurality of working ends 14312 are spaced apart from the initial end 14311 differently, so that the torque generated by the torsion spring 142 is different when the torque adjusting end 1423 is mounted to each of the working ends 14312 differently. That is, when the torsion spring 142 is located at different working ends 14312, the torsion spring 142 may generate different torques, that is, apply different pretightening forces to the motor shaft 151, so as to meet different working requirements and adapt to more working environments.

In this embodiment, the plurality of working ends 14312 are all disposed on the same circumference with the axis of the motor shaft 151 as the center of a circle. It is ensured that the torsion spring 142 does not deform in the direction of the center of the circle when the torsion spring 142 is mounted on any working end 14312, thereby achieving the purpose of reliable pre-tightening. Further, the plurality of working ends 14312 are located at different distances from the axis of the motor shaft 151, and the magnitude of the torque when the torque adjustment end 1423 is located at different working ends 14312 can be easily recognized. In some embodiments, a plurality of the working ends 14312 may be spaced apart from one another. Specifically, the plurality of working ends 14312 includes at least a first working end and a second working end, and the initial end 14311 of the track groove 1431 is in separate communication with the first working end and the second working end. That is, the torque adjustment end 1423 may reach the first working end and the second working end along two different paths from the initial end 14311, respectively.

In this embodiment, referring to fig. 7 and 8, the track groove 1431 includes a groove portion 14314 for communicating the initial end 14311 with the plurality of working ends 14312, the groove portion 14314 includes a main body groove portion 143141 and a plurality of branch groove portions 143142 formed by branching from the tail end of the main body groove portion 143141, and the tail ends of the plurality of branch groove portions 143142 form the working ends 14312; that is, the torque adjustment end 1423 may reach different branch groove portions 143142 along the main body groove portion 143141 from the initial end 14311 to different working ends 14312; so set up, can save track groove 1431 occupies the space of cloud platform mount 143, can set up as far as possible in limited space work end 14312 satisfies different work situations, can avoid again that the track groove 1431 of many fretworks can reduce the intensity of cloud platform mount 143, when reaching the purpose, compromise again the security of cloud platform mount 143.

In one embodiment, as shown in fig. 7, the connection line between the axis of the motor shaft 151 and the initial end 14311 is a, the connection line between the axis of the motor shaft 151 and the working end 14312 is B, and the included angle between the connection line a and the connection line B is a pre-tightening angle, where the greater the pre-tightening angle, the greater the pre-tightening force. The torsion spring 142 can move from the initial end 14311 to the working end 14312 along any inner or outer side, and a plurality of working ends 14312 are designed so as to achieve the purpose of quickly switching different pretightening forces of the torsion spring 142 without disassembling structural members, and the switching process is quicker and more effective. In the embodiment shown in fig. 7, the track groove 1431 is formed by sequentially connecting a plurality of circular arc grooves, and the working end 14312 and the initial end 14311 are positioned in the same circular arc. In this embodiment, in order to avoid the torsion spring 142 from automatically separating from the working end 14312, it is necessary to ensure that the maximum curvature A2 of the circular arc where the track groove 1431 is located is greater than the curvature A1 of the circular arc where the working end 14312 and the initial end 14311 are located, i.e. A2> A1, and the circular arc is curved as the curvature is greater, so that a blocking and limiting can be formed for the torque adjusting end 1423 to separate from the working end 14312.

With continued reference to fig. 7 and 8, in some embodiments, the track slot 1431 includes at least a first arcuate slot 14315 and a second arcuate slot 14316, and the center of curvature of the first arcuate slot 14315 and the center of curvature of the second arcuate slot 14316 can be located on different sides or on the same side of the track slot 1431. That is, the specific shape of the track groove 1431 may be flexibly selected according to practical situations, for example, the track groove 1431 may be flexibly set according to the arrangement of the rest parts on the holder 143. When the centers of curvature of the first and second arc-shaped

grooves

14315 and 14316 are disposed at the same side, the sliding process of the torque adjusting end 1423 from the initial end 14311 to the working end 14312 is smoother, so that the external force is more convenient to apply and the working end 14312 is easier to reach; when the curvature centers of the first arc-shaped groove 14315 and the second arc-shaped groove 14316 are arranged on different sides, the bending position of the track groove 1431 can be increased so as to adapt to different arrangement situations, reasonably avoid and fully utilize the space.

In some embodiments, the first and second

arcuate slots

14315, 14316 may each be configured to protrude toward a side of the motor shaft 151 or protrude toward a side away from the motor shaft 151; or the first arc groove 14315 protrudes towards the motor shaft 151, the second arc groove 14316 protrudes towards a direction far away from the motor shaft 151, or the first arc groove 14315 protrudes towards a direction far away from the motor shaft 151, and the second arc groove 14316 protrudes towards the motor shaft 151, so that the relative positions of the first arc groove 14315 and the second arc groove 14316 can be flexibly selected according to practical situations.

Referring to fig. 9, in some embodiments, the initial end 14311 and the working end 14312 are each configured as a circular arc-shaped structure 14317, the circular arc-shaped structure 14317 has a diameter B2, the track groove 1431 has a width B3, and the spring wire of the torsion spring 142 has a diameter B1, B3-B1>0.4mm, and B2-B3>0.4mm. The diameter B3 of the track groove 1431 is larger than the diameter B1 of the spring wire, and the spring wire of the torsion adjusting end 1423 of the torsion spring extending into the track groove 1431 can smoothly slide in the track groove without being blocked in the middle, so that the working end 14312 or the initial end 14311 cannot be smoothly reached; the diameter B2 of the initial end 14311 and the working end 14312 of the circular arc-shaped structure 14317 is larger than the diameter B1 of the spring wire, so that the spring wire of the torque adjusting end 1423 can be smoothly slid into the initial end 14311 or the working end 14312, and the torque adjusting end 1423 is disposed between the initial end 14311 and the working end 14312.

The foregoing description of the preferred embodiments of the present invention is not intended to limit the invention to the precise form disclosed, and any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A pan-tilt camera, comprising:

the cradle head rear shell comprises a motor cabin;

2. The pan-tilt camera of claim 1, wherein between the initial end and the working end, the track groove has at least one position having a linear distance from the initial end greater than a linear distance from the working end to the initial end.

3. The pan-tilt camera according to claim 2, wherein the track groove is formed by sequentially communicating a plurality of sections of circular arc grooves, the working end and the initial end are located in the same circular arc, and the maximum curvature of the circular arc where the track groove is located is larger than the curvature of the circular arc where the working end and the initial end are located.

4. The pan-tilt camera of claim 1, wherein the pan-tilt side cover includes a first shaft hole, the pan-tilt mount includes a second shaft hole, the first shaft hole is coaxial with the second shaft hole, the motor shaft extends out of the second shaft hole through the first shaft hole, and the initial end and the working end are disposed on a same circumference centered on an axis of the motor shaft.

5. The pan-tilt camera of claim 4, wherein the torsion spring comprises a circular spiral structure formed by winding a spring wire, one end of the spring wire is the fixed end, the other end of the spring wire is the torque adjusting end, an axis of the circular spiral structure coincides with an axis of the motor shaft, the circular spiral structure stretches and deforms along a radial direction of the motor shaft, and the motor shaft sequentially passes through the pan-tilt side cover, the circular spiral structure and the pan-tilt fixing frame and is fixedly connected with the pan-tilt fixing frame.

6. The pan-tilt camera of claim 5, wherein the pan-tilt side cover comprises a receiving cavity facing the second axial hole opening and an inner limiting structure formed in a central area of the receiving cavity, the torsion spring is received in the receiving cavity, the receiving cavity is communicated with the track groove, the circular spiral structure is sleeved on the outer side of the inner limiting structure and deforms in a telescopic manner along a radial direction of the circular spiral structure, and a peripheral space of the inner limiting structure is formed as a deformation space of the circular spiral structure.

7. The pan-tilt camera of claim 6, wherein the pan-tilt side cover further comprises a plurality of outer side limiting structures disposed in the receiving cavity, wherein the plurality of outer side limiting structures are disposed around the inner side limiting structures and distributed on a same circumference with an axis of the motor shaft as a center of a circle.

8. The pan-tilt camera of claim 1, wherein the working end has a plurality of working ends, wherein the working ends are spaced apart from the initial end by different distances, and wherein the torsion spring generates different torques when the torsion adjusting end is mounted to different ones of the working ends.

9. The pan-tilt camera of claim 8, wherein the plurality of working ends are disposed on a same circumference centered on an axis of the motor shaft.

10. The pan-tilt camera of claim 8, wherein the track slot includes a slot portion that communicates the initial end with the plurality of working ends, the slot portion including a main body slot portion and a plurality of branch slot portions branching from a distal end of the main body slot portion, the distal ends of the plurality of branch slot portions forming each of the working ends; or (b)