KR200328709Y1 - A mechanism for tilting Movement of camera - Google Patents

Abstract

Disclosed is a tilt driving apparatus of a camera that is improved to be able to drive a compact and heavyweight camera at a low load. The device is a fixed block 100, the first worm wheel 110 is fixedly installed on the top of the fixed block, the rotation block 200 is rotatably supported on the fixed block and has a fixed wall 230, and fixed The first worm 223 rotatably supported on the wall and engaged with the first worm wheel, the fan motor 220 rotating the first worm 223 and the fixed wall in parallel with the first worm 223. The second worm 213 rotatably supported by the 230, the tilt motor 210 provided in parallel with the fan motor 220 while rotating the second worm 213 and the first and second worms ( 223 and 213, a rotation shaft 215 rotatably supported on the fixed wall 230 and the second worm wheel 214 coupled to the rotation shaft 215 and engaged with the second worm 213 to rotate. And a tilt plate 400 coupled to both ends of the rotation shaft 215 and rotated together with the rotation shaft 215 to mount the camera 500. In addition, both ends of the rotation shaft 215, the torsion springs 331, 341 and the interlocking blocks 332, 342 for reducing the load of the tilt motor 210 is coupled. The interlocking block is coupled to both ends of the rotating shaft 215 to rotate together with the rotating shaft 215, and the tilt plate 400 is fixed to the outer surface of the interlocking block with the bolt 343. Torsion springs provided on both end sides of the rotating shaft are coupled in opposite directions so that the action force is in the opposite direction. Such a device allows the restoring force of the torsion spring to act together when the camera moves up and down to reduce the load of the tilt motor, thereby extending the service life and increasing the durability of the gear and enabling quick control. . In addition, since the tilting operation is performed while elasticity is given by the torsion spring, it is possible to provide a good image by absorbing external vibration or shock.

Description

Tilt drive of camera {A mechanism for tilting Movement of camera}

The present invention relates to a driving device for the tilt operation of the camera, and more particularly to a tilt driving device of the camera improved to be able to drive a compact and weight camera at a low load.

In general, surveillance cameras are adopted in public places such as houses, roads, parking lots, department stores, banks and exhibition halls to prevent illegal activities and theft.

Such surveillance cameras have fixed cameras capable of monitoring only a certain area, and mobile cameras using pan / tilt motors capable of monitoring a wide area.

The mobile camera employs a Pan (Pan, Panoramic or less Pan) driving operation to rotate the camera horizontally and a Tilt (Tilting Movement or less Tilt) driving operation to move the lens portion of the camera up and down.

Such mobile cameras can be controlled by a user's operation and can be rotated by a set program to monitor the surroundings. Thus, the use of mobile cameras is increasing than that of fixed cameras.

An example of such a mobile camera is schematically illustrated in FIG. 1. The illustrated driving device of the camera includes a camera mount 10 to which the camera 1 is mounted, a fan operation unit 30 connected to the camera mount 10 to implement a fan operation, and a tilt operation. It is composed of a large tilt operation performing unit 40 to implement.

The camera mount 10 has a fixed frame 11 located in the front, a rear plate 13 connected to the fixed frame 11 by a pair of horizontal links 12, and the horizontal link 12 It consists of a pair of vertical links 14 connected to one side, and a connecting rod 15 of a predetermined length to connect one end of the vertical link (14). The camera 1 is mounted on the rear plate 13 side.

Meanwhile, a fan motor 31 having a drive gear 32 and a driven gear 33 meshed with the drive gear 32 and supported by the fixed frame 11 are rotatably supported by the fixed plate 50. have.

In addition, the rack 43 is installed through the fixing plate 50 and the driven gear 33, and the rack 43 is connected to the spur gear 42 which is rotationally driven by the tilt motor 41. . An upper end portion of the rack 43 is provided with a transfer plate 21 rotatably supported by the connecting rod 15.

Such a driving device performs a pan operation in which the camera mount 10 rotates left and right by the rotation of the drive gear 32 and the driven gear 33 by the driving of the fan motor 31, and the tilt motor 41. The rack 43 is moved up and down by driving the back plate 13 to move up and down to perform the tilt operation.

However, the camera driving apparatus as described above has the following problems.

First, the rack 43 has a structure that is elevated by the power of the tilt motor 41 while supporting the load including the camera 1 and the camera mount 10, the load of the tilt motor 41 acts greatly It is difficult to control quickly. In particular, when the rack 43 is moved downward and the down direction is taken, the tilt motor 41 is reversely driven to move the rack 43 upward, so that the load of the camera 1 and the camera mount 10 may be reduced. As a result, the load of the tilt motor 41 is greatly acted, which makes it difficult to control quickly and shortens the life of the motor.

Second, since the rack 43 has a structure in which the tilt 43 is moved up and down for the tilting operation, it is required to secure space for this, which causes the device to be enlarged.

Third, since the tilt operation is performed by engaging the rack 43 and the spur gear 42 that mount the camera and the camera mounting stand, the friction force increases, thereby promoting wear of the tooth surface, reducing durability and generating noise. have.

The present invention has been made to solve the above problems, has the following objectives.

First, to reduce the load of the tilt motor to provide an improved tilt control device of the camera to enable rapid control.

Secondly, to provide a tilt driving apparatus of a camera which is simple in structure and which is advantageous in miniaturization.

Third, the present invention provides a tilt driving apparatus for a camera that increases durability of a gear and reduces noise generation.

1 is a schematic view showing a driving apparatus of a conventional camera,

Figure 2 is a perspective view showing a camera turning table employing the drive device of the present invention,

Figure 3 is a schematic exploded perspective view showing a drive device of the present invention,

4A and 4B are schematic operation diagrams for explaining a fan operation;

5 is a schematic diagram for explaining a tilting operation;

6 is a schematic cross-sectional view of FIG.

7 is a sectional view of principal parts of the device of the present invention.

* Explanation of symbols for main parts of the drawings

100 ... Block 101,102 ... Bearings

110 1st worm wheel 200 rotating block

210.Tilt motor 215 ... Rotating shaft

213 ... Second Worm 214 ... Second Worm Wheel

220 ... fan motor 230 ... fixed wall

310 ... housing 320 ... cover

331,341.Torsion springs 332,342 Interlocking blocks

332a, 342a ... Grip 400 ... Tilt Plate

500 ... Camera

The present invention to achieve the above object is a rotary shaft rotatably supported at both ends on a fixed wall, a tilt motor for rotating the rotary shaft and a tilt plate coupled to both ends of the rotary shaft and rotated together with the rotary shaft In the tilt drive device of the camera having:

It is characterized by having a pair of torsion springs coupled concentrically to both ends of the rotating shaft, each end of which is fixed to the fixed wall, and the other end of which is fixed to the tilt plate.

In the driving device, a pair of interlocking blocks are coupled to both ends of the rotary shaft and rotated together with the rotary shaft, and the tilt plate is fixed to each outer surface, and each other end of each of the torsion springs is the interlocking block. It may be configured in a structure fixed to.

In addition, when the rotation shaft is rotated in one direction, the diameter of the one torsion spring is contracted, and the other torsion spring is coupled in opposite directions so that the diameter does not change.

In addition, the worm wheel is coupled to the rotary shaft, the worm wheel is engaged with the worm and the worm is rotated by the tilt motor, the tilt motor is rotated via the worm and the worm wheel tilt motion It is supposed to be done.

According to the above feature of the present invention, the mechanism of the present invention is provided on the torsion spring at both ends of the rotation shaft, so that the restoring force of the torsion spring is acting during the tilting operation of the camera to reduce the load of the tilt motor.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 2 and a schematic separated perspective view of FIG. 2 showing a camera pivot drive employing a camera tilt driving apparatus according to an embodiment of the present invention, it is possible to perform horizontal rotation and vertical rotation of the camera 500. It adopts pan / tilt drive.

The driving device is fixed to the fixed block 100, the first worm wheel 110 is fixed to the upper end of the fixed block 100, the fixed block 100 is rotatably supported and fixed to the fixed wall 230 The rotating block 200, the first worm 223 rotatably supported by the fixed wall 230 and meshed with the first worm wheel 110, and the first worm 223 to drive the rotation The fan motor 220, the second worm 213 rotatably supported on the fixed wall 230 in parallel with the first worm 223, and the second worm 213 are rotated to drive the fan. A tilt motor 210 provided in parallel with the motor 220, a rotation shaft 215 rotatably supported by the fixed wall 230 to intersect the axes of the first and second worms 223 and 213, and The second worm wheel 214 is coupled to the rotation shaft 215 and engaged with the second worm 213 and rotated, and coupled to both ends of the rotation shaft 215 and rotated together with the rotation shaft 215, and the camera ( 500 ), There is provided a tilt plate 400.

In addition, as shown in Figures 3 and 6, the housing 310 for coupling and fixed to the rotation block 200 and protects the tilt motor 210, the fan motor 220 and the fixed wall 230, The cover 320 is coupled to the top of the housing 310 to be opened and closed.

The rotating block 200 which rotates together while supporting the tilt motor 210, the fan motor 220, the fixing wall 230, the housing 310, the camera 500, and the like smoothly with respect to the fixing block 100. Bearings 101 and 102 (see Fig. 6) are installed to be able to rotate.

The fan motor 220 is fixedly installed on the fixed wall 230 and rotates the first drive spur gear 221, and the first drive spur gear 221 is rotatably supported on the fixed wall 230. The driven spur gear 222 is driven to rotate. The first worm 223 meshed with the first worm wheel 110 is installed coaxially with the first driven spur gear 222. This configuration is such that when the first worm 223 is rotated by the power of the fan motor 220, as shown in FIGS. 4A and 4B, around the first worm wheel 110 fixed to the fixed block 100. The first worm 223 rotates. Accordingly, the rotation block 200, the motor 210, 220, and the camera 500 move horizontally around the first worm wheel 110 fixed to the fixed block 100.

In addition, the tilt motor 210 is fixedly installed on the fixed wall 230 in parallel with the fan motor 220 to rotate and drive the second drive spur gear 211, the second drive spur gear 211 is The second driven spur gear 212 rotatably supported by the fixed wall 230 is driven to rotate. The second worm 213 meshed with the second worm wheel 214 is installed coaxially with the second driven spur gear 212. The rotating shaft 215 rotatably supported by the fixed wall 230 is orthogonal to the axes of the zeum 213 and the second driven spur gear 212, and the camera 500 is provided at both ends of the rotating shaft 215. The mounted tilt plate 400 is coupled to rotate together with the rotation shaft 215.

In this configuration, when the second worm 213 is rotated by the power of the tilt motor 210, the first worm wheel 214 and the rotation shaft 215 are rotated, and as shown in FIG. 2, the tilt plate 400 is rotated. It will rotate up and down.

On the other hand, referring to Figures 3, 4 and 7 as a characteristic configuration of the present invention, both ends of the rotation shaft 215, the torsion springs (331, 341) and the linkage for reducing the load of the tilt motor 210 Blocks 332 and 342 are combined. The interlocking blocks 332 and 342 are coupled to both ends of the rotating shaft 215 to be rotated together with the rotating shaft 215. The tilt plate 400 is attached to the outer surface of the interlocking blocks 332 and 342 to form a bolt ( 343).

The torsion springs 331 and 341 are installed between the interlocking blocks 332 and 342 and the fixing wall 230, and each end of the torsion springs 331 and 341 is formed on the fixing wall 230. It is fixed to the coupling hole 231 and the other end is to be caught by the engaging projections (332a, 342a) formed in the interlocking blocks (332, 342).

At this time, the torsion springs 331 and 341 which are installed at both end sides of the rotation shaft 215 are coupled in opposite directions so that the action force is in the opposite direction.

As shown in FIGS. 2 and 4a, when the rotating shaft 215 is rotated counterclockwise by the power of the tilt motor 210, when the tilting operation is performed in which the camera 500 tilts downward, one torsion spring 331 is formed. When the contraction action occurs in which the diameter of N) is reduced, the other torsion springs 341 are not changed in diameter.

On the contrary, when the rotating shaft 215 is rotated in the clockwise direction (see FIG. 4A), when the tilting operation is performed in which the camera 500 is inclined upward, the contraction action of reducing the diameter of one torsion spring 341 occurs while the other toe is rotated. The ocean spring 331 is not changed in diameter.

Therefore, when the camera 500 is rotated upward by the power of the tilt motor 210 in the downward state, the torsion spring that has been contracted is restored, thereby reducing the load of the tilt motor 210.

In the above, when the camera 500 is in a horizontal state, as shown in FIG. 4A, the respective torsion springs 331 and 341 are not deformed, and when the rotation shaft 215 is rotated clockwise or counterclockwise, One torsion spring is deformed while the other is not deformed.

2 to 4, the diameter of the torsion spring 331 is contracted while the camera 500 is tilted downward while the other torsion spring 341 is not deformed. Subsequently, when the rotating shaft 215 rotates clockwise as the reverse direction of the tilt motor 210 rotates upward, the load of the tilt motor 210 is restored by the restoring force of the torsion spring 331 that has been contracted. Alleviate. When the camera 500 is in a horizontal state, all of the torsion springs 331 and 341 are restored. In addition, while the torsion spring 341 is contracted while the camera 500 is tilted upward, the other torsion spring 331 is not deformed, and the restoring force of the torsion spring 341 when the camera 500 is tilted downward again. A rapid downward slope is achieved by.

Meanwhile, in the above embodiment, each end of the torsion springs 331 and 341 may be designed to be directly fixed to the tilt plate 400 without being fixed to the interlocking blocks 332 and 342.

The present invention as described above is not limited to the above embodiments and can be practiced with many modifications without departing from the spirit and scope of the present application.

The tilt drive device of the present invention as described above allows the restoring force of the torsion spring to work together when the tilting operation of the camera is rotated up and down, thereby reducing the load of the tilt motor to extend the life and increasing the durability of the gear. And quick control is possible.

In addition, since the tilting operation is performed while elasticity is given by the torsion spring, it is possible to provide a good image by absorbing external vibration or shock.

In addition, since the worms are arranged side by side from each motor, and the tilt operation of the camera is made by the rotation of the rotation axis by the worm wheels, the structure is simple and advantageous in miniaturization.

Claims (4)

Tilt drive device having a rotating shaft rotatably supported at both ends on a fixed wall, a tilt motor for rotating the rotating shaft, and a tilt plate coupled to both ends of the rotating shaft to rotate together with the rotating shaft to mount a camera. To And a pair of torsion springs coupled concentrically to both ends of the rotating shaft, each end of which is fixed to the fixing wall and each other of which is fixed to the tilt plate. The interlocking block of claim 1, wherein a pair of interlocking blocks are coupled to both ends of the rotational shaft and rotated together with the rotational shaft, and the tilt plate is fixed to each outer surface, and each other end of each of the torsion springs is connected to the interlocking block. Tilt drive of the camera, characterized in that fixed to. The tilt of the camera according to claim 1 or 2, wherein the diameter of the one torsion spring is contracted and the other torsion spring is coupled in opposite directions so that the diameter does not change when the rotation shaft is rotated in one direction. Drive system. The tilt driving apparatus of claim 1 or 2, wherein a worm wheel is coupled to the rotation shaft, and a worm wheel is engaged with the worm wheel and rotated by the tilt motor.