CN210372660U

CN210372660U - Camera angle adjusting mechanism and camera system

Info

Publication number: CN210372660U
Application number: CN201921198642.1U
Authority: CN
Inventors: 谢清伟
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-04-21
Anticipated expiration: 2029-07-26

Abstract

The application discloses camera angle adjustment mechanism and camera system. This camera angle adjustment mechanism includes: the camera comprises a gear set, a fixed bearing plate, a camera fixing plate and a driving wheel, wherein the gear set comprises a transmission gear train and a driving wheel meshed with the transmission gear train, the transmission gear train is arranged on the bearing plate, and the camera fixing plate can rotate and is driven by the driving wheel to rotate. The carrier plate is provided with a toothed ring, with which the drive wheel engages in such a way that the drive wheel rotates and displaces relative to the carrier plate. The camera angle adjusting mechanism uses a gear transmission mechanism, has small volume and is convenient to apply to a camera system.

Description

Camera angle adjusting mechanism and camera system

Technical Field

The application relates to the field of gear transmission, in particular to a camera angle adjusting mechanism. The application also relates to a camera system comprising such a camera adjustment mechanism.

Background

In the aspect of security protection, the camera is widely applied. In order to facilitate the control of the camera in the monitoring room to monitor a plurality of positions, an angle adjustment mechanism is generally mounted on the camera to facilitate the steering of the camera.

In the prior art, a universal joint is generally used as an angle adjustment mechanism. However, the gimbal is bulky and is not suitable for use in a camera.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a camera angle adjustment mechanism. The camera angle adjusting mechanism uses gear transmission, has small volume and is convenient to apply to a camera system.

According to the utility model discloses camera angle adjustment mechanism of first aspect, include: a gear train including a transmission gear train and a driving wheel engaged with the transmission gear train, a fixed carrier plate on which the transmission gear train is mounted, a rotatable camera fixing plate rotated by the driving wheel, wherein the carrier plate is configured with a ring gear engaged with the ring gear such that the driving wheel rotates and displaces with respect to the carrier plate.

In one embodiment, the transmission gear train comprises a sun wheel, the drive wheel is a planet wheel in external engagement with the sun wheel, and the sun wheel, planet wheel and annulus form a reduction gear train; in the reduction gear train, the sun gear serves as an input gear, the planet gear serves as an output gear, and the radius of the sun gear is smaller than that of the planet gear.

In one embodiment, in the reduction gear train, the reduction ratio of the reduction gear train is greater than the ratio of the radius of the planet wheel to the radius of the sun wheel.

In one embodiment, the transmission gear train further comprises a driving wheel and a transmission wheel coaxial with the sun wheel, the sun wheel and the driving wheel are located in the gear ring of the bearing plate, and the driving wheel is meshed with the transmission wheel and both located outside and close to the bearing plate.

In one embodiment, the ring gear includes a smooth portion having meshing portions of gear teeth and default gear teeth, the meshing portions meshing with the drive wheel.

In one embodiment, two limiting structures for limiting the driving wheel are arranged in the smooth part and are respectively adjacent to two ends of the meshing part.

In one embodiment, the limiting structure is an arc-shaped area extending radially outwards from the smooth part, the diameter of the arc-shaped area is larger than the diameter of the addendum circle of the meshing part, and the span of the arc-shaped area in the circumferential direction is larger than or equal to the distance between two gear teeth.

In one embodiment, the carrier plate includes a ring gear plate and a reinforcing plate fixedly coupled together in a stacked manner, the ring gear includes an engagement hole formed in the ring gear plate to be engaged with the driving wheel and a first fitting hole formed in the reinforcing plate to correspond to the engagement hole, and the driving wheel is received in the first fitting hole and the engagement hole.

In one embodiment, a second fitting hole intersecting the first fitting hole is further configured on the reinforcing plate, and the sun gear is received in the second fitting hole and engaged with the driving wheel.

According to the present invention, the camera system of the second aspect comprises a camera and the camera angle adjusting mechanism as described above installed in the camera.

Compared with the prior art, the beneficial effects of the utility model are as follows: according to the utility model discloses a camera angle adjustment mechanism has adopted gear drive, and its volume is less, is convenient for use in the camera system. In addition, the gear transmission enables the angle adjustment of the camera to be accurate.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is an exploded schematic view of a camera angle adjustment mechanism according to an embodiment of the present invention.

Fig. 2 schematically shows a first side of the camera angle adjustment mechanism.

Fig. 3 schematically shows a second side of the camera angle adjustment mechanism.

Fig. 4 schematically shows a camera system according to the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 shows a camera angle adjustment mechanism 1 according to an embodiment of the present invention in an exploded schematic view. As shown in fig. 1, the camera angle adjusting mechanism 1 includes: a gear train, a fixed carrier plate 200 and a rotatable camera fixing plate 300. In addition, the camera angle adjusting mechanism 1 further includes a housing (not shown) that accommodates the gear train, the carrier plate 200, and the camera fixing plate 300. The gear set will be described in detail below.

The carrier plate 200 is fixedly connected with the housing such that the carrier plate 200 and the housing are relatively fixed. The gear train comprises a transmission gear train 101 and a drive wheel 102 in engagement with the transmission gear train 101. The transmission gear train 101 is mounted on the carrier plate 200, and the driving wheel 102 is movable relative to the carrier plate 200. The camera mounting plate 300 is used to mount a camera 400 (shown in fig. 4) and is driven to rotate by the drive wheel 102. For example, the gear shaft 103 of the driving wheel 102 is fixedly coupled to the camera fixing plate 300. A toothed rim 211 is formed on the carrier plate 200, with the drive wheel 102 engaging in the toothed rim 211.

With the camera angle adjustment mechanism 1 shown in fig. 1, when the transmission gear train 101 rotates and the drive wheel 102 is self-transmitted by the meshing transmission, the drive wheel 102 is simultaneously meshed with the ring gear 211 to be rotationally displaced relative to the carrier plate 200. Thereby, the camera fixing plate 300 driven by the driving wheel 102 is also rotationally displaced with respect to the carrier plate 200, and thus the camera 400 is also rotated, thereby achieving the adjustment of the angle of the camera 400. The gear unit of this embodiment is significantly smaller in volume than the gimbal, and is thus particularly suitable for use with a camera. In addition, the gear transmission enables the angle adjustment of the camera to be accurate.

As also shown in fig. 1, the transmission gear train 101 includes a sun gear 104, and the driving wheel 102 is a planetary wheel externally engaged with the sun gear 104. In this case, the sun gear 104, the planet gears 102, and the ring gear 211 form a reduction gear train. In the reduction gear train, the sun gear 104 is an input gear, the planetary gears 102 are output gears, and the radius of the sun gear 104 is smaller than that of the planetary gears 102. Because the radius of the sun gear 104 is smaller than the radius of the planet gears 102, deceleration can be achieved. For a camera fixed plate 300 (or camera 400) driven by the planet 102, the camera 400 can be kept stable when the angle of the camera 400 is adjusted.

In the reduction gear train, the reduction ratio of the reduction gear train is larger than the ratio of the radius of the planetary gear 102 to the radius of the sun gear 104. For example, the reduction ratio of the reduction gear train (i.e., the ratio of the rotational speed of the planetary gear 102 to the rotational speed of the sun gear 104) is 10, and the ratio of the radius of the planetary gear 102 to the radius of the sun gear 104 is 2.5. Thus, a larger reduction ratio can be achieved using the reduction gear train formed by the sun gear 104, the planet gears 102 and the ring gear 211 while maintaining the ratio of the radius of the planet gears 102 to the radius of the sun gear 104, and the larger reduction ratio helps to keep the camera 400 stable when adjusting the angle of the camera 400, thereby helping to accurately adjust the angle of the camera 400.

Fig. 2 schematically shows a first side of the camera angle adjustment mechanism 1. Fig. 3 schematically shows a second side of the camera angle adjustment mechanism 1. With reference to fig. 1, 2 and 3, the transmission gear train 101 further comprises a drive wheel 105 and a transmission wheel 106 coaxial with the sun wheel 104. For example, the sun gear 104 and the driving gear 106 share one gear shaft 110, and the gear shaft 110 is mounted on the carrier plate 200. The sun wheel 104 and the driving wheel 102 are located in the toothing 211 of the carrier plate 200, and the driving wheel 105 is in engagement with the transmission wheel 106 and both located outside the carrier plate 200 and next to the carrier plate 200. Thus, in the present embodiment, the sun gear 104 and the driving wheel 102 each use a thin gear having a thickness matching that of the carrier plate 200; in addition, the capstan 105 and the transmission wheel 106 are also in a close state to the carrier plate 200, thereby contributing to a reduction in the thickness of the camera angle adjustment mechanism 1 to facilitate application of the camera angle adjustment mechanism 1 to a camera system. It should be understood that the driving wheel 105 can be driven to rotate by a power source such as a motor, and the description thereof is omitted.

In a preferred embodiment, as shown in FIG. 1, carrier plate 200 includes a ring gear plate 202 and a reinforcement plate 203 that are stacked and fixedly attached together. The ring gear 211 includes a meshing hole 204 formed in the ring gear plate 202 to mesh with the drive wheel 102, and a first fitting hole 205 formed in the reinforcing plate 203 to correspond to the meshing hole 204. The drive wheel 102 is received in the engagement hole 204 and the first fitting hole 205. According to this structure, the reinforcing plate 203 acts to reinforce the strength of the entire structure of the camera angle adjustment mechanism 1, thereby improving the operational stability of the camera angle adjustment mechanism 1. Further, in the fitted state, the engagement hole 204 and the first fitting hole 205 correspond, and as a whole, the engagement hole 204 and the first fitting hole 205 form one hole so that the drive wheel 102 can be accommodated in the engagement hole 204 and the first fitting hole 205.

A second fitting hole 206 intersecting the first fitting hole 205 is also configured on the reinforcing plate 203. The sun gear 104 is received within the second adapter aperture 206. Thus, the sun gear 104 engages with the drive wheel 102 through the intersection of the first and second adapter holes 205, 206. Preferably, the reinforcement plate 203 is above the ring gear plate 202 in a direction toward the camera fixing plate 300. In this case, the thickness of the sun gear 104 is equal to the thickness of the reinforcing plate 203, and the thickness of the driving wheel 102 is equal to the sum of the thicknesses of the ring gear plate 202 and the reinforcing plate 203, so that the driving wheel 102 protrudes into the first fitting hole 205 to be engaged with the sun gear 104.

As also shown in fig. 1, the ring gear 211 (or the mesh aperture 204) includes a mesh portion 207 having gear teeth formed on the ring gear plate 202 and a smooth portion 208 having default gear teeth. The engaging portion 207 engages with the drive wheel 102. The corresponding circumferential angle of the engagement portion 207 defines the angular adjustment range of the camera 400. In one embodiment, the engagement portion 207 corresponds to a circumferential angle of 30 degrees.

A limiting structure 209 for limiting the driving wheel 102 is provided in the smooth portion 208, and two limiting structures 209 are provided and are respectively adjacent to both ends of the engaging portion 207. Thus, when the driving wheel 102 moves to the end of the engaging portion 207, the forward movement is not continued due to the limit of the limit structure 209, so that the camera angle adjusting mechanism 1 is not damaged. In a particular embodiment, the stop structure 209 is an arcuate region extending radially outward from the smooth portion 208. The diameter of the arc-shaped area is larger than the diameter of the addendum circle of the meshing portion 207, and the span of the arc-shaped area in the circumferential direction is equal to or larger than the pitch of two gear teeth. Thus, when the driving wheel 102 moves to the arc region, the driving wheel 102 cannot continue to move forward due to lack of an engagement object, thereby serving as a blocking function for the driving wheel 102. The structure is simple, and the machine-shaping is easy, thereby reducing the production cost.

Fig. 4 schematically shows a camera system 4 according to the invention. The camera system 4 includes a camera 400 and the camera angle adjustment mechanism 1 as described above installed below the camera 400. For example, the camera 400 may be fixedly mounted on the camera fixing plate 300 of the camera angle adjusting mechanism 1.

Thus, when the angle of the camera 400 needs to be adjusted, the driving wheel 105 is driven by the power source to rotate; the transmission wheel 106 rotates through a meshing relationship with the driving wheel 105; the sun gear 104 rotates coaxially with the transmission wheel 106, and therefore rotates in the same manner as the transmission wheel 106; the drive wheel 102 (i.e., the planetary wheel) rotates by meshing relationship with the sun gear 104 and the ring gear 211; the driving wheel 102 drives the camera fixing plate 300 to rotate; thereby achieving adjustment of the angle of the camera 400 mounted on the camera fixing plate 300.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A camera angle adjustment mechanism, comprising:

a gear train including a transmission gear train and a drive wheel engaged with the transmission gear train,

a stationary carrier plate, the drive gear train being mounted on the carrier plate,

a rotatable camera fixing plate driven to rotate by the driving wheel,

wherein the carrier plate is provided with a toothed ring, the drive wheel engaging in the toothed ring such that the drive wheel rotates and displaces relative to the carrier plate.

2. The camera angle adjustment mechanism of claim 1, wherein the transmission gear train comprises a sun gear, the drive wheel is a planetary gear that is in external engagement with the sun gear, and the sun gear, planetary gear, and ring gear form a reduction gear train;

in the reduction gear train, the sun gear serves as an input gear, the planet gear serves as an output gear, and the radius of the sun gear is smaller than that of the planet gear.

3. The camera angle adjustment mechanism according to claim 2, characterized in that in the reduction gear train, a reduction ratio of the reduction gear train is larger than a ratio of a radius of the planetary gear to a radius of the sun gear.

4. The camera angle adjustment mechanism of claim 2, wherein the transmission gear train further comprises a drive wheel and a transmission wheel coaxial with the sun wheel,

the sun gear and the driving wheel are located in the gear ring of the bearing plate, and the driving wheel is meshed with the driving wheel and located on the outer side of the bearing plate and close to the bearing plate.

5. The camera angle adjustment mechanism of claim 2, wherein the ring gear includes a smooth portion having meshing portions of gear teeth and default gear teeth, the meshing portions meshing with the drive wheel.

6. The camera angle adjustment mechanism of claim 5, wherein two of the limiting structures are provided in the smooth portion to limit the driving wheel, and are respectively adjacent to both ends of the engaging portion.

7. The camera angle adjustment mechanism according to claim 6, wherein the stopper structure is an arc-shaped region extending radially outward from the smooth portion, a diameter of the arc-shaped region is larger than a diameter of an addendum circle of the meshing portion, and a span of the arc-shaped region in the circumferential direction is equal to or larger than a pitch of two gear teeth.

8. The camera angle adjustment mechanism according to any one of claims 2 to 7, wherein the bearing plate includes a rim plate and a reinforcing plate which are stacked and fixedly connected together,

the ring gear includes an engagement hole formed on the ring gear plate to be engaged with the drive wheel, and a first fitting hole formed on the reinforcing plate to correspond to the engagement hole, the drive wheel being received in the first fitting hole and the engagement hole.

9. The camera angle adjustment mechanism according to claim 8, wherein a second fitting hole intersecting the first fitting hole is further configured on the reinforcing plate, and the sun gear is received in the second fitting hole and is engaged with the driving wheel.

10. A camera system comprising a camera and a camera angle adjustment mechanism according to any one of claims 1 to 9 mounted to the camera.