KR100708472B1 - Monitoring camera - Google Patents

Abstract

Disclosed is a surveillance camera having a rotation controller capable of adjusting a photographing direction or angle. The surveillance camera has a camera housing; At least one motor installed in the camera housing; A lens holder disposed rotatably in the camera housing and having a lens mounted therein; And a rotation control unit for rotating the lens holder within a range of a predetermined angle; The rotation control unit includes a gear unit for transmitting the rotational force of the motor to the lens holder to rotate the lens holder, a stopper for restricting rotation of the lens holder beyond a certain range when the lens holder is rotated by the gear unit, and the lens holder is a stopper. When blocked by the lens holder, it is characterized in that it comprises a buffer for allowing the lens holder to be further rotated within a certain degree without being stopped immediately. According to the present invention, when the lens holder is blocked by the stopper during rotation adjustment, even if the motor is not immediately stopped or reversely rotated by the user's operation delay, the lens holder can be further rotated within a certain degree by the buffer part. , The gear bit of the gear that rotates the lens holder does not occur, and accordingly, the user has to drive the motor forcefully to release the gear bite and damage the motor or visit the remote site to repair or replace the surveillance camera. Can be prevented.

Surveillance Camera, Lens Holder, Tilt, Rotation, Stopper, Shock Absorber, Bar

Description

Monitoring camera

1 is a partial perspective view of a conventional combined domed surveillance camera shown with some parts removed for illustrative purposes.

FIG. 2 is a perspective view of a lens holder of the surveillance camera shown in FIG. 1. FIG.

Figure 3 is an exploded perspective view of the combined dome surveillance camera according to the present invention.

4 is a partially assembled perspective view of the surveillance camera shown in FIG. 3, showing some parts for illustrative purposes.

FIG. 5 is a perspective view of a lens holder of the surveillance camera shown in FIG. 3. FIG.

6A to 6C are side views illustrating the operation of the surveillance camera shown in FIG. 4.

* Explanation of symbols for main parts of the drawings

100: surveillance camera 110: camera housing

111, 112: hemispherical cover 113: lens cover

115: tilt direction rotation control unit 120: lens holder

125: lens 132: tilt motor

134: gear 135: worm gear

136: worm wheel 138: arc gear

139: shaft 140: stopper

142, 144: protrusion 150: buffer part

151, 152, 153, 154: flexible bar

The present invention relates to a surveillance camera used in a closed circuit surveillance apparatus, and more particularly, to a surveillance camera having a rotation control unit that can adjust the shooting direction or angle.

Generally, in closed houses, department stores, banks, exhibition halls, factories, etc., a closed circuit television (CCTV) system, which is a closed circuit monitoring device, is installed to prevent theft or to easily check the operation status and process flow of the machine. I can do it.

Such a CCTV system captures a plurality of surveillance areas to be managed by a surveillance camera installed in each surveillance area, and transmits the captured images to a monitor installed in an office for monitoring through the monitor, or, if necessary, only a desired scene of a VCR (video record using a cassette recorder).

In addition, the CCTV system may install an optical sensor device in the surveillance area to automatically record the image transmitted from the surveillance camera using the VCR when the intrusion is confirmed.

Surveillance cameras used in such a CCTV system is a fixed camera that can monitor only a designated area within the surveillance area, or a fan rotation control unit that controls rotation in the left and right directions so as to monitor the entire area within the surveillance area. A rotatable camera having a tilt direction control unit for controlling the rotation of the motor is used.

Since the fixed camera is fixedly installed so that switching of the shooting direction or angle is impossible, there is a problem in that the camera must be installed at a plurality of positions by dividing the monitoring area when the monitoring area is to be wide or the space is divided.

On the contrary, the rotatable camera can adjust the shooting direction or angle of the camera up and down and / or left and right within a predetermined range by the user's remote wireless operation or wired operation or a set program. Even if you want to monitor the compartments, you can monitor with one camera without having to install cameras in multiple locations. Therefore, in recent years, the use of a rotating camera is increasing.

1 is a partial perspective view of a conventional surveillance dome-type surveillance camera 1 having a tilt-direction rotation control as a rotation surveillance camera.

As shown in FIG. 1, the conventional combined dome type surveillance camera 1 includes a camera housing 10, a lens holder 20, and a tilt direction rotation controller 15.

The camera housing 10 is formed in the form of a coupling dome, and is provided with a lens cover 11 having an elongated lens window 13 at the center of the front surface (lower surface of FIG. 1).

As shown in FIG. 2, the lens holder 20 has a hemispherical housing installed so that a lens (not shown) is exposed to the front through the lens window 13 of the lens cover 11 in the fixing hole 27 inside the center. Is formed.

The tilt direction rotation control unit 15 is for rotating the lens in the vertical direction (left and right direction A in FIG. 1) through the lens window 13 in a range of a predetermined angle, and the gear unit 34 and the stopper ( 40).

The gear part 34 is a worm wheel 36 having an worm gear 35 formed on the shaft 33 of the tilt motor 32 and an arc gear 37 having an arc gear 38 engaged with the worm gear 35. It is configured to, and converts the rotational force of the tilt motor 32 in the vertical direction to reduce the transmission to the lens holder 20.

The arc-shaped gear 37 is rotatably supported by the shaft 39 to the first and second high intelligences 17 (only one shown) of the camera housing 10 and is integrally connected to the lens holder 20. It is.

The stopper 40 is moved upwards or downwards by the rotational force of the tilt motor 32 through which the lens holder 20 is transmitted through the worm gear 35 of the gear part 34 and the arc gear 37 of the worm wheel 36. On the inner circumferential surface of the camera housing 10, the left (upper side in FIG. 2) edge 21 and the right side (in FIG. 2) of the lens holder 20 are limited so as to limit the upper or lower rotation range of the lens holder 20 when rotating in the direction. It consists of first and second left protrusions 42 and 44 and first and second right protrusions (not shown) respectively formed to face the lower edge 22 of FIG. 2.

Therefore, in order to adjust the tilt of the lens, when the tilt motor 32 is driven, the rotational force of the tilt motor 32 is arc-shaped gear 38 of the arc-shaped gear 37 of the wheel wheel 36 through the worm gear 35. Is passed on. As a result, the lens holder 20 is rotated by a worm wheel 36 that rotates about the shaft 39. At this time, when the lens holder 20 rotates upward or downward over a predetermined range, the rotation of the lens holder 20 is in contact with the left or right edge 21, or 22 of the lens holder 20. It is limited by the first or second left protrusion 42, or 44 and the first or second right protrusion of 40.

However, the conventional surveillance camera 1 configured as described above is left or right of the lens holder 20 when controlling the lens holder 20 to be rotated upward or downward by a user's remote control operation or a set program. When the edge 21 or 22 is blocked by the first or second left protrusion 42 or 44 and the first or second right protrusion of the stopper 40, the operation delay of the user or the control error of the set program, etc. As a result, the tilt motor 32 may be further driven for a predetermined time without being immediately stopped or reversely rotated.

In this case, the worm gear 35 of the gear part 34 rotates while being engaged with the arc gear 38 of the arc gear 37 of the worm hill 36 by the driving force of the tilt motor 32, but the lens holder 20 Since the left or right edge 21, or 22 is blocked by the first or second left protrusion 42, or 44 and the first or second right protrusion, it does not rotate, so that the worm gear 35 and the arc gear 38 are not rotated. ) May cause gear bites where the gears are not normally engaged with each other by the driving force of the tilt motor 32 and are not interlocked with each other.

Such a bite is automatically released by the driving force of the tilt motor 32 when the tilt motor 32 is reversely rotated again by the user's remote control operation or the control of a set program. When generated, it is not released even by the driving force of the tilt motor 32. In this case, if the tilt motor 32 is excessively driven to release the gear bite, the tilt motor 32 may be damaged by overload. In addition, in this case, if the gear bite is not released, a problem arises in that the user needs to visit the remote site to replace or repair the monitoring gamma 1 in order to release the gear bite.

The present invention has been made to solve the above problems, an object of the present invention is to rotate the gear to rotate the lens holder by the stopper limiting the rotation range of the lens holder during rotation adjustment to prevent the occurrence of gear bite The present invention provides a surveillance camera having an adjustment unit.

Surveillance camera according to an embodiment of the present invention for achieving the above object, the camera housing; At least one motor installed in the camera housing; A lens holder disposed rotatably in the camera housing and having a lens mounted therein; And at least one rotation control unit for rotating the lens holder within a range of a predetermined angle; The rotation control unit includes a gear unit for transmitting the rotational force of the motor to the lens holder to rotate the lens holder, a stopper for restricting rotation of the lens holder beyond a certain range when the lens holder is rotated by the gear unit, and the lens holder is a stopper. When blocked by the lens holder, it is characterized in that it comprises a buffer for allowing the lens holder to be further rotated within a certain degree without being stopped immediately.

The stopper may be composed of at least one pair of protrusions formed at predetermined intervals on the inner circumferential surface of the camera housing, and the buffer part may be configured of at least one pair of flexible bars formed in the lens holder opposite the protrusions of the stopper. The flexible bars are preferably arranged symmetrically with each other by first and second incision grooves formed symmetrically with respect to the horizontal plane passing through the center of rotation of the lens holder.

At this time, the gear unit may be composed of a worm gear coaxially formed on the shaft of the motor, and a worm wheel having an arc gear engaging with the worm gear, and connected to the lens holder and rotatably supported on the camera housing.

Hereinafter, the monitoring camera according to the present invention will be described in detail with reference to the accompanying drawings.

3 is an exploded perspective view showing the combined dome type surveillance camera 100 according to the present invention.

As shown in Figures 3 and 4, the combined homogeneous surveillance camera 100 of the present invention is a rotating camera, the camera housing 110, the tilt motor 132, the lens holder 120, and the tilt direction rotation control The unit 115 is provided.

The camera housing 110 is composed of first and second hemispherical covers 111 and 112 connected to each other in the form of a coupling dome by fixing means such as screws. The front and rear surfaces of the first and second hemispherical covers 111 and 112 are provided with a lens cover 113 having a lens window 114.

The tilt motor 132 is fixed to the first cover 111 by the motor bracket 132a.

The lens holder 120 includes first and second hemispherical covers 111 and 112 and a hemispherical housing (see FIG. 5) installed to rotate along an inner circumferential surface of the lens cover 113. In the center of the lens holder 120, a complementary metal oxide semiconductor (CMOS) lens 125 is passed through the fixing hole 127 by the fixing member 126 and through the lens window 114 of the lens cover 113. It is installed to be exposed to the front. The printed circuit board 128 equipped with a signal processing circuit for processing an image incident through the CMOS lens 125 is fixed to the lens holder 120 behind the fixing member 126.

The tilt direction rotation control unit 115 rotates the lens holder 120 holding the CMOS lens 125 in the vertical direction within a range of a predetermined angle through the lens window 114. The gear unit 134 and the stopper 140, and a buffer unit 150.

The gear unit 134 is composed of a worm gear 135 and a worm wheel 136, and converts and rotates the rotational force of the tilt motor 132 vertically and transmits it to the lens holder 120.

The worm gear 135 is formed on the shaft 133 of the tilt motor 132.

The worm wheel 136 includes a shaft 139 and an arc gear 137 having an arc tooth 138. The shaft 139 is rotatably supported at both ends by the first and second support bosses 117 (only the first bosses are shown) formed on the inner circumferential surfaces of the first and second hemispherical covers 111 and 112, respectively. It is fixed to the printed circuit board 128 and the lens holder 120 at the rear of the printed circuit board 128 by the first and second high information 139a 139b extending forward. The arc gear 138 of the arc gear 137 protrudes backward from the center of the shaft 139 to engage with the worm gear 135.

As shown in FIGS. 3 and 6A to 6C, the stopper 140 includes a tilt motor 132 in which the lens holder 120 is transmitted through the worm gear 135 and the worm wheel 136 of the gear unit 134. First and second hemispherical covers 111 and 112 to limit the upper and lower rotation ranges of the lens holder 120 when rotating downward and upward (right and left sides of FIGS. 6A to 6C) by the rotational force of It consists of the first and second left projections (142, 144) and the first and second right projections (not shown) formed at predetermined intervals on the inner circumferential surface thereof.

 The buffer unit 150 is to allow the lens holder 120 to be more elastically rotated within a certain degree without being stopped immediately when the lens holder 120 is blocked by the stopper 140. As illustrated, the left and right sides of the lens holder 120 are opposed to the first and second left protrusions 142 and 144 of the stopper 140 and the first and second right protrusions (upper and lower in FIG. 5). And first and second left flexible bars 151 and 152 and first and second right flexible bars 153 and 154 respectively formed at the edges. The first and second left flexible bars 151 and 152 and the first and second right flexible bars 153 and 154 respectively have a rotational center line of the lens holder 120, that is, the shaft 139, to simplify the structure. By the first and second left incision grooves 121 and 122 and the first and second right incision grooves 123 and 124 formed symmetrically with respect to the horizontal plane passing through (see FIG. 3; vertical in FIGS. 4 to 6C). Are arranged symmetrically with each other.

In the above, the surveillance camera 100 of the present invention is provided with only the tilt direction control unit 115 for rotating the lens holder 120 holding the CMOS lens 125 in the vertical direction, and the buffer unit 150 rotates in the tilt direction. Although illustrated and described as being applied only to the control unit 115, the present invention is not limited thereto. That is, the surveillance camera 100 of the present invention further includes a fan rotation control unit (not shown) of a known configuration for rotating the lens holder 120 in the left and right directions, and the buffer unit 150 has the same configuration as described above. And may be configured to be applied to the fan rotation control in principle.

The tilt adjustment operation of the combined dome type surveillance camera 100 according to the present invention configured as described above will be described in detail with reference to FIGS. 6A to 6C.

In the following description, the tilt adjustment operation of the surveillance camera 100 is shown in FIG. 6B in the central position shown in FIG. 6A by the user by remote wireless or wired operation or a set program for illustrative purposes. It will be described on the assumption that it moves to one lower position, moves to the upper position shown in FIG. 6C, and then returns to the center position shown in FIG. 6A.

First, when power is applied to rotate the tilt motor 132 in one direction, for example, in a clockwise direction by a user's remote control operation or a set program, the tilt motor 132 is rotated in a clockwise direction.

The rotational force of the tilt motor 132 is transmitted to the arc gear 138 of the arc gear 137 of the worm wheel 136 through the worm gear 135 of the gear unit 134. Thus, the worm wheel 136 is rotated counterclockwise around the shaft 139 at the central position shown in FIG. 6A.

As the worm wheel 136 is rotated counterclockwise, the lens holder 120 fixed to the shaft 139 by the first and second high intelligences 139a and 139b may have the first and second hemispherical covers 111, 112 is rotated counterclockwise along the inner circumferential surface of the lens cover 113.

Thereafter, as shown in FIG. 6B, when the first left and right flexible bars 151 and 153 of the buffer unit 150 are blocked by contacting the first left and right protrusions 142 of the stopper 140, the tilt is performed. The motor 132 is reversely rotated in the other direction, ie counterclockwise, by a user's remote control operation or a set program.

However, at this time, if the tilt motor 132 does not immediately rotate counterclockwise due to a user's operation delay or a control error of a set program, the lens holder 120 continuously rotates the tilt motor 132 clockwise. It rotates further counterclockwise by delay or error time.

At this time, since the first left and right flexible bars 151 and 153 have elastic force, the lens holder 120 is pushed by the first left and right protrusions 142 even if the lens holder 120 further rotates counterclockwise. Enable counterclockwise rotation of 120. Accordingly, the worm gear 135 of the gear unit 134 is an arc-shaped gear 137 of the worm wheel 136 by the distance that the first left and right flexible bars 151 153 are pushed and moved by the first left and right protrusions 142. The rotational force of the tilt motor 132 is transmitted to the lens holder 120 without generating a gear bite that is abnormally engaged with the arc gear 138 of ().

Then, when the tilt motor 132 is normally reversed by the user's remote control operation or a set program, the lens holder 120 is clockwise by the power transmission operation of the worm gear 134 and the arc gear 138 described above. It rotates and moves to the upper position of FIG. 6C via the center position of FIG. 6A.

When the lens holder 120 reaches the upper position, as described above, if the tilt motor 132 does not immediately rotate clockwise due to a user's operation delay or a control error of a set program, the lens holder 120 Is rotated further clockwise by the delay or error time by the continuous counterclockwise rotation of the tilt motor (132). In this case, the second left and right flexible bars 152 and 154 are pushed by the second left and right protrusions 144 to enable clockwise rotation of the lens holder 120. Accordingly, the worm gear 135 of the gear unit 134 is the arc-shaped gear 137 of the worm wheel 136 by the distance that the second left and right flexible bars 152 154 are pushed and moved by the second left and right protrusions 144. The rotational force of the tilt motor 132 is transmitted to the lens holder 120 without generating a gear bite that is abnormally engaged with the arc gear 138 of ().

Then, when the tilt motor 132 is normally reversed by the user's remote control operation or a set program, the lens holder 120 is counterclockwise by the power transmission operation of the worm gear 134 and the arc gear 138 described above. Direction and rotates to the center position shown in FIG. 6A and stops by the user's remote control operation or a set program.

As described above, in the surveillance camera according to the present invention, when the lens holder is blocked by the stopper during tilt adjustment, even if the tilt motor is not immediately stopped or reversed due to a user's operation delay or a control error of a set program, Since the lens holder has a shock absorbing portion that can be rotated more elastically within a certain degree, the lens holder is rotated, which is caused by the rotation of the tilt motor without stopping or reverse rotation while the lens holder is blocked by the stopper. Gear bites do not occur. Therefore, the user is forced to drive the tilt motor to loosen the gear bite to damage the tilt motor, or to visit the remote site directly to repair or replace the surveillance camera is prevented.

In the above, certain preferred embodiments of the present invention have been illustrated and described. However, the present invention is not limited to the above-described embodiments, and any person having ordinary skill in the art to which the present invention pertains without departing from the spirit and spirit of the present invention as claimed in the claims may have various modifications and Modifications may be made.

Claims (5)

A camera housing; At least one motor installed in the camera housing; A lens holder rotatably disposed in the camera housing and having a lens mounted therein; And At least one rotation control unit for rotating the lens holder within a range of a predetermined angle; The rotation control unit is a gear unit for transmitting the rotational force of the motor to the lens holder to rotate the lens holder, limiting the rotation of the lens holder more than a certain range when the lens holder is rotated by the gear unit And a stopper, and a shock absorbing portion for allowing the lens holder to rotate further within a certain degree without stopping immediately when the lens holder is blocked by the stopper during rotation adjustment. The method of claim 1. And the stopper includes at least one pair of protrusions formed at predetermined intervals on an inner circumferential surface of the camera housing. The method of claim 2. And the buffer part comprises at least one pair of flexible bars formed in the lens holder opposite the protrusion of the stopper. 4. The surveillance camera of claim 3, wherein the flexible bars are disposed symmetrically with each other by first and second incision grooves formed symmetrically with respect to a horizontal plane passing through the rotation centerline of the lens holder. The method of claim 3, wherein the gear unit, A worm gear coaxially formed on the shaft of the motor; And And a worm wheel having an arc gear that meshes with the worm gear, the worm wheel being connected to the lens holder and rotatably supported by the camera housing.

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