JP2004212465A - Camera for remote control - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera for remote control the number of parts of which is reduced to be small, the assembly work of which is facilitated and which is suitable for compaction. <P>SOLUTION: In the case of constituting the camera for remote control 10 of a pedestal 11 having an internal gear 43 on its inner periphery, a turntable 30 rotatably attached to the pedestal, and a camera main body 12 turnably attached to a supporting frame 51 erectly provided on the turntable through rotary shafts 52a and 52b nearly orthogonal to the center of rotation of the turntable, a driving gear 46 and an intermediate gear 43 attached to the driving shaft of a 1st servo motor 44 as a horizontal turning mechanism are attached to a supporting plate 40 having a punch hole in the center, and meshed in a state where both of them press-contact with each other, and further the plate 40 is attached to a rotary base plate 31 so that it can rock, and the gear 43 is made to press-contact and meshed with an internal gear 23 by an elastic means. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a remote control camera particularly suitable for a surveillance camera, in which the direction of the camera can be freely changed by remote control by rotating horizontally and vertically.
[0002]
[Prior art]
In general, as a turning device for turning a mounting base of a monitoring camera, a rotation axis of a robot arm, and the like, for example, there is one disclosed in Japanese Patent Application Laid-Open No. H10-90758. This prior art exemplifies a state in which a turning device is assembled to a monitoring camera. A supporting rod for hanging the monitoring camera is connected to the motor via a reduction gear, and the supporting rod is driven by the driving force of the motor. Are rotated.
[0003]
By the way, when the vehicle turns sharply or reverses sharply, the meshing surfaces of the gears interfere with each other due to the backlash of the gears, machining errors, and assembly errors, thereby generating noise and vibration. In particular, when a pulse motor is used as the motor, noise and vibration become more apparent because rotation fluctuation occurs for each pulse.
[0004]
For this reason, Japanese Patent Application Laid-Open No. 2000-55142 discloses a swing member connected to a turntable, a fixed ring provided on the outer periphery of the turntable and having an inner gear, and a motor fixed to the swing member. An intermediate gear pivotally supported by the oscillating member, a drive gear axially mounted on the motor and meshing with the intermediate gear, and pressing the oscillating member toward the inner gear via the drive gear and the intermediate gear. A turning device comprising a biasing pressing member is disclosed.
[0005]
According to this device, when the motor fixed to the swinging member connected to the turntable rotates, the drive gear mounted on the motor changes the intermediate gear pivotally supported by the swinging member. Thus, the inner gear provided on the inner periphery of the fixed ring is rotated, and the turntable is rotated by the reaction force. At this time, since the pressing member presses and biases the swinging member in the direction of the inner gear via the driving gear and the intermediate gear, gear backlash, machining error, and assembly error are absorbed, and noise and vibration are reduced. Can be achieved.
[0006]
[Patent Document 1]
JP-A-10-90758 [Patent Document 2]
JP 2000-55142 A
[Problems to be solved by the invention]
However, in the device disclosed in Japanese Patent Application Laid-Open No. 12-55142, a motor is mounted on the first lever, an intermediate gear is pivotally supported on the second lever, and the first lever is mounted on the first lever. Since the intermediate gear is urged against the inner gear by urged by the urging member in the direction of the second lever, the number of parts is increased, it takes time and effort to assemble the apparatus, and it is difficult to make the apparatus compact. There was a problem.
[0008]
Accordingly, it is an object of the present invention to provide a remote control camera which requires a small number of parts of an apparatus, is easy to assemble, and is suitable for downsizing.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a remote control camera according to the present invention includes a base having an internal gear on an inner periphery, a turntable rotatably mounted on the base, and an upright stand on the turntable. A camera body rotatably mounted on a support frame via a rotation axis substantially orthogonal to the rotation center of the turntable, wherein the turntable pivotally supports one point on the turntable. A support plate, which is swingably supported and has a hole or slit formed in the center, a first motor fixed to one side of the support plate with the hole or slit therebetween, A drive gear that is rotated by a motor, and is rotatably supported on the other side of the support plate with the cutout hole or slit interposed therebetween, and is pressed against the drive gear by the elastic force of the cutout hole or slit. The intermediate gear and the support plate And resiliently urged to rotate in a predetermined direction relative to the rolling stand, and having a resilient biasing means for meshing with said intermediate gear to the internal gear of the turntable.
[0010]
According to the invention, the first motor and the intermediate gear are provided on the support plate with the hole or slit interposed therebetween, and the driving gear of the first motor and the intermediate gear are pressed against each other by the elastic force of the hole or slit. In this state, since the intermediate gear is further meshed with the internal gear of the rotary table, the rotation of the drive gear causes the intermediate gear to rotate along the internal gear while meshing with the internal gear, thereby rotating. The table rotates with the camera body. At this time, since the drive gear, the intermediate gear and the internal gear are each elastically pressed, the backlash is less likely to occur and the rattling noise is reduced. Also, the first motor, the driving gear, and the intermediate gear can be mounted on the turntable by previously installing the first motor and the intermediate gear on the support plate and mounting the support plate on the turntable. The assembling work is facilitated and the number of parts can be reduced.
[0011]
In the remote control camera according to the present invention, a second motor is provided on the turntable, and a drive shaft of the second motor has an elasticity capable of moving a predetermined distance in the axial direction while being engaged in the rotational direction. The camera body is connected to a worm gear via a coupling made of a material.The camera body is provided with a vertically rotating gear that rotates integrally with the camera body and meshes with the worm gear. It is preferable that the elastic member is biased in the drive shaft direction by an elastic means and is elastically pressed against the vertically rotating gear.
[0012]
According to the above aspect, since the drive shaft of the second motor and the worm gear are connected via the coupling made of the elastic material, the tolerance of the mounting accuracy is increased, and the generation of noise due to vibration absorption is reduced. be able to. Further, since the worm gear is urged in the drive shaft direction by the elastic means, the meshing between the worm gear and the vertically rotating gear is always kept in close contact, so that backlash and rattling noise can be reduced.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a remote control camera according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the remote control camera, FIG. 3 is an exploded perspective view of a horizontal rotation mechanism of the remote control camera, and FIG. 5 is a cross-sectional plan view of the horizontal rotation mechanism, FIG. 5 is a side view showing a vertical drive mechanism of the remote control camera, and FIG. 6 is a perspective view showing a connection structure between a drive shaft of a second motor and a worm gear in the vertical drive mechanism. FIG.
[0014]
As shown in FIG. 1, the remote control camera 10 is particularly suitable for a surveillance camera, and includes a base 11 fixed to an indoor ceiling or the like, and a horizontally rotatable and vertically movable base 11. And a cover 13 that covers the camera body 12. The cover 13 rotates horizontally together with the camera body 12, and a window 15 made of a transparent material is attached along a direction in which the lens 14 is directed as the camera body 12 moves up and down.
[0015]
Referring also to FIG. 2, the base 11 includes a large-diameter cylindrical portion 11a and a small-diameter cylindrical portion 11b. In the large-diameter cylindrical portion 11a, a plurality of wiring boards 21 on which electronic components constituting a control circuit are mounted are arranged at predetermined intervals vertically. The small-diameter cylindrical portion 11b is fixed to the large-diameter cylindrical portion 11a by a screw 22.
[0016]
As shown in FIG. 3, an internal gear 23 is fixed by screws 24 on the inner circumference at the bottom of the small-diameter cylindrical portion 11b. Further, a rotating substrate 31 constituting a rotating table 30 described later is fixed via a screw 32 to a rotating shaft 33 arranged in the small-diameter cylindrical portion 11b. The rotating shaft 33 is rotatably supported at the center of the bottom of the small-diameter cylindrical portion 11b via a bearing (not shown). Therefore, the rotating substrate 31 can be horizontally rotated integrally with the rotating shaft 33.
[0017]
Three cylindrical columns 34 are fixed to the rotating substrate 31 via screws 35. An end of a resin support plate 40 is sandwiched between one of the columns 34a and the rotating substrate 31, and a screw 35 is inserted through a hole 41 formed at the end. Screwed. The column 34a has a built-in rotary shaft held by a bearing (not shown), and the support plate 40 is fixed to the rotary shaft and supported to be swingable.
[0018]
Referring also to FIG. 4, the support plate 40 has an elongated hole 42 formed therein. An intermediate gear 43 is rotatably supported at the center of one side of the hole 42 via a support shaft (not shown). A first servomotor 44 is fixed to the other side of the hole 42 with a screw (not shown), and a drive shaft 45 projects through the hole 42 to the opposite side (upper side in FIG. 3) of the support plate. . A drive gear 46 is mounted on the drive shaft 45. The drive gear 46 meshes with the intermediate gear 43 by pressing the intermediate gear 43 by slightly opening the hole 42 and applying the elastic force of the support plate 40.
[0019]
The support plate 40 is swingably supported by the screws 35 screwed to the columns 34 as described above, but the other end is provided by a spring 47 interposed between the support plate 40 and the rotating substrate 31. It is biased outward. As a result, as shown in FIG. 4 in particular, the intermediate gear 43 is pressed against and meshes with the internal gear 23 by the urging force of the spring 47.
[0020]
As described above, according to the present invention, the drive gear 46 mounted on the drive shaft of the first servomotor 44 and the intermediate gear 43 are attached to the support plate 40 in a state where they are pressed and meshed. The horizontal rotation mechanism can be configured only by attaching the support plate 40 to the rotating substrate 31 and engaging the intermediate gear 43 with the internal gear 23, so that the number of parts is reduced, and assembly of the apparatus is achieved. Workability is improved, meshing of each gear is ensured, and failures are reduced.
[0021]
The support plate 40 preferably has the above-described hole 42, but may have a slit cut from a part of the outer periphery. A resin gear is preferably used for elastically pressing the drive gear 46 and the intermediate gear 43, but it may be formed of a thin metal plate or the like.
[0022]
Reference numeral 49 shown in FIG. 4 is a limit switch that regulates the horizontal rotation angle in order to prevent the wiring from being twisted, though the details are omitted.
[0023]
An upper plate 50 is also fixed to the column 34 by screws, and the rotating board 30 of the present invention is constituted by the rotating substrate 31, the upper plate 50, and the column 34 connecting them.
[0024]
One end of the upper plate 50 is bent in an L-shape as viewed from the long side direction, and the bent portion is screwed to the upper plate 50 to be erected perpendicularly and parallel to the upper plate 50. A pair of support frames 51, 51 are attached. The camera body 12 is supported by the support frames 51, 51 via support shafts 52a, 52b so as to be vertically movable (tilted).
[0025]
5 and 6, a worm wheel 53 is mounted on one support shaft 52a. A second servomotor 54 is mounted on a surface of the upper plate 50 on the side of the rotating substrate 31. The drive shaft 55 of the second servo motor 54 protrudes from the surface on the opposite side of the rotating substrate 31.
[0026]
A hole 55a is formed in the drive shaft 55, and a sleeve 56 is mounted on the outer periphery thereof. The drive shaft 55 and the sleeve 56 are connected by inserting the connecting pin 57 through the hole 56a of the sleeve 56 and the hole 55a of the drive shaft 55. At the tip of the sleeve 56, a convex portion 56b projecting in a rib shape is formed.
[0027]
On the other hand, a worm shaft 59 having a worm 58 meshing with the worm hole 53 is disposed at right angles to a support shaft 52a of the camera body 12 via a bracket 60 erected from the upper plate 50. Supported.
[0028]
A hole 59a is formed at the base end of the worm shaft 59, and a pin 62 is inserted into the hole 59a. The sleeve 56 and the worm shaft 59 are connected via a coupling 63 made of an elastic material such as synthetic rubber.
[0029]
The coupling 63 has grooves 63a and 63b formed in both ends of the cylindrical body as a whole so as to intersect each other. The convex portion 56b of the sleeve 56 is inserted into one groove 63a, and the other groove 63a. The pin 52 inserted into the worm shaft 59 is inserted into the groove 63b.
[0030]
As a result, the sleeve 56 and the worm shaft 59 are connected so as to rotate integrally with each other while allowing some movement in the axial direction within a range not protruding from the depths of the grooves 63a and 63b of the coupling 63. Have been.
[0031]
Further, by using the coupling 63 made of such an elastic material, even if a slight displacement occurs between the drive shaft 55 and the worm shaft 59, the assembly error can be absorbed, and the assembly accuracy can be reduced. Can be increased.
[0032]
Next, the operation of the remote control camera 10 will be described.
In the remote control camera 10, when a drive signal is input to a control circuit mounted on the wiring board 21 via a LAN or the Internet by a personal computer, a mobile phone, or the like, the first servomotor 44 and the second The servo motor 54 rotates so that the camera body 12 can be directed in a desired free direction.
[0033]
That is, when the first servomotor 44 rotates, the intermediate gear 43 meshing with the internal gear 23 fixed to the small-diameter cylindrical portion 11b of the base 11 rotates via the drive gear 46, and the intermediate gear 43 It moves in the circumferential direction of the internal gear 23 by the number of gears proportional to the rotation angle. As a result, the rotating substrate 31 also rotates integrally via the support plate 40 on which the intermediate gear 43 is mounted, and the upper plate 50 connected via the support column 34 also rotates integrally. As a result, the camera body 12 can be rotated in the horizontal direction.
[0034]
When the second servomotor 54 rotates, the worm 58 rotates via the sleeve 56, the coupling 63, and the worm shaft 59, and the worm wheel 53 and the support shaft 52a meshing with the worm 58 rotate, and the camera body is rotated. 12 can be turned up and down to perform a tilting operation. In this way, by combining the horizontal rotation and the vertical rotation, the lens 14 of the camera body 12 can be directed in any free direction.
[0035]
In the present invention, as described above, the drive gear 46 mounted on the drive shaft of the first servomotor 44 and the intermediate gear 43 are attached to the support plate 40, and the hole 42 of the support plate 40 is widened. The two members are brought into contact with each other by the generated elastic force, and the support plate 40 is urged by the spring 47 in this state, so that the intermediate gear 43 is brought into pressure contact with the internal gear 23. And vibration and noise due to rotation can be reduced.
[0036]
Similarly, since the worm 58 rotated by the second servomotor 54 is pressed against the worm wheel 53 by the spring 61, backlash between both gears is reduced, and the coupling 63 made of an elastic material reduces vibration. Since it absorbs, vibration and noise due to rotation can be reduced.
[0037]
【The invention's effect】
As described above, according to the present invention, the first motor and the intermediate gear are provided on the support plate with the cutout hole or slit interposed therebetween, and the elastic force of the cutout hole or slit causes the driving gear of the first motor and The intermediate gear is pressed against the internal gear, and in this state, the intermediate gear further meshes with the internal gear of the rotary table. Rotate, which causes the turntable to rotate with the camera body. At this time, since the drive gear, the intermediate gear and the internal gear are each elastically pressed, the backlash is less likely to occur and the rattling noise is reduced. Also, the first motor, the driving gear, and the intermediate gear can be mounted on the turntable by previously installing the first motor and the intermediate gear on the support plate, and mounting the support plate on the turntable. The assembling work is facilitated and the number of parts can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a remote control camera according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the camera for remote operation.
FIG. 3 is an exploded perspective view of a horizontal rotation mechanism of the remote control camera.
FIG. 4 is a plan sectional view of the horizontal rotation mechanism.
FIG. 5 is a side view showing a vertical drive mechanism of the remote control camera.
FIG. 6 is a perspective view showing a connection structure between a drive shaft of a second motor and a worm gear in the vertical drive mechanism.
[Explanation of symbols]
REFERENCE SIGNS LIST 10 remote control camera 11 base 11 a large-diameter cylindrical portion 11 b small-diameter cylindrical portion 12 camera body 13 cover 15 window 21 wiring board 23 internal gear 30 turntable 31 rotation board 33 rotation shaft 34 support 40 support plate 42 punching hole 43 intermediate Gear 44 First servo motor 45 Drive shaft 46 Drive gear 47 Spring 50 Support frame 53 Worm wheel 54 Second servo motor 55 Drive shaft 56 Sleeve 58 Worm 59 Worm shaft 60 Bracket 63 Coupling

Claims (2)

A base having an internal gear on the inner periphery, a turntable rotatably mounted on the base, and a support frame erected on the turntable are substantially orthogonal to the rotation center of the turntable. A camera body rotatably mounted via a rotating shaft, wherein the turntable is pivotally supported at one location on the turntable and is swingably supported, and a hole or slit is provided at the center. The formed support plate, a first motor fixed to one side of the support plate with the hole or slit interposed therebetween, a driving gear rotated by the first motor, and the hole or the hole of the support plate. An intermediate gear rotatably supported on the other side with the slit interposed therebetween and meshing with the drive gear in a state of being pressed against the drive gear by the elastic force of the hole or the slit, and the support plate with respect to the turntable. Elastically biased to rotate in a predetermined direction, Serial remote control camera; and a resilient biasing means the intermediate gear is meshed with the internal gear of the turntable. A second motor is installed on the turntable, and a drive shaft of the second motor is driven by a worm gear via a coupling made of an elastic material that is movable in a predetermined distance in the axial direction while being engaged in the rotation direction. The camera body is provided with a vertically rotating gear that rotates integrally with the camera body and meshes with the worm gear. The worm gear is attached by elastic means in the drive shaft direction. The remote control camera according to claim 1, wherein the camera is biased and elastically pressed against the vertically rotating gear.

Images