JPH11334471A - Car mounted monitor camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a distance between a camera main body and a fulcrum, applying fixing force to the camera main body in the use to prevent flicker in a screen by vibration, suppress the number of component parts to reduce the size, and provide a car-mounted monitor camera in good on board performance. SOLUTION: A monitor camera is provided with a camera main body 13 integratedly composed with an actuator 14 and having a supporting shaft 16 as the fulcrum of rotation, a supporting body 18 having bearings for rotatably supporting the supporting shaft 16 of the camera main body 13, a storing container 17 for holding and fixing the supporting body 18 and for storing the camera main body 13, a link mechanism 27 provided between the output shaft 20 of the actuator 14 and the supporting body 18 and for transmitting the torque of the output shaft 20 as the rotatory force of the camera main body 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle surveillance camera mounted on a vehicle for monitoring an external periphery of the vehicle with a monitor in the vehicle.

[0002]

2. Description of the Related Art FIG. 6 shows a configuration of a conventional on-vehicle surveillance camera disclosed in, for example, JP-A-2-31956. In the figure, reference numeral 1 denotes a chassis having a stepped portion 1a which is partially open on the lower surface side and serves also as a positioning when mounted on a vehicle, and 2 denotes a stepped portion 1 of the chassis 1.
A pair of hinges 3 provided at the end of the a is attached to the stepped portion 1a of the chassis 1 via the hinge 2, and a bottom plate that is rotatable downward is attached to the bottom plate 3. A camera holder for holding the main body 5, a motor 6 fixed to the chassis 1 via a support 7, a screw shaft 8 attached to a rotor shaft of the motor 6 via a universal joint 9, and a screw shaft 10 A nut member screwed to 8 and rotatably attached to the camera holder 4 via a support fitting 11. A cover 12 covers the upper surface of the chassis 1 and the upper surface of the camera body 5.

[0003] In the conventional monitoring camera for a vehicle mounted as described above, when not in the monitoring state, the nut member 10 screwed with the screw shaft 8 is drawn toward the motor 6 by the rotation of the screw shaft 8 and the cover 12 is closed. The camera body 5 is stored in a storage container formed by the chassis 1 and the bottom plate 3,
Protected from weather degradation. In use, when the screw shaft 8 is driven by the motor 6 and the nut member 10 is pushed by the lead of the screw shaft 8, the bottom plate 3, the camera body 5, and the holder 4 for fixing the camera body 5 are integrally formed. As a result, the camera body 8 rotates downward with the hinge 2 as a fulcrum, and the camera body 8 is taken out below the cover 12 to be in a shooting state.

[0004]

In addition to the above arrangement, a camera slides on a slide bed and is taken out of a storage container as disclosed in Japanese Utility Model Application Laid-Open No. 60-153062. Although a configuration is also disclosed, in each case, a camera is attached to a movable member, and the movable member is held on a fixed member by a fulcrum. Since the distance from the position of the fulcrum to the camera increases, the camera body 5 There was a problem with the earthquake resistance in the shooting state. For example, in the conventional example shown in FIG. 6, the fulcrum is the hinge 2, and the camera body is attached to the bottom plate 3 supported by the hinge 2. Therefore, when vibration of the vehicle body is applied to the camera body 5, the tip of the camera body 5 Vibration is amplified in the attached lens part, and the image on the monitor in the cabin becomes blurred and clear images cannot be obtained, so it is suitable for in-vehicle monitoring equipment that requires instantaneous judgment. It was hard to say. Further, since the camera and an actuator such as a motor for operating the camera are separate components, there is a problem in miniaturization of the apparatus.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and shortens the distance between the camera body and a fulcrum, and applies a fixing force to the camera body during storage and use to cause the screen to be vibrated. An object of the present invention is to prevent camera shake, reduce the number of components and reduce the size, and obtain an in-vehicle surveillance camera with good mountability.

[0006]

According to the present invention, there is provided an on-vehicle surveillance camera, comprising: a camera body integrally formed with an actuator; a support body rotatably supporting the camera body via a support shaft; It has a storage container that holds and fixes the support body and stores the camera body, and a link mechanism that is provided between the output shaft of the actuator and the support body and that transmits torque of the output shaft as rotational power of the camera body. is there.

Further, a bottom cover for closing the bottom of the storage container is formed integrally with the camera body. Further, an elastic member for applying a tensile load is provided between the camera body and the support, and a load axis is provided so that the load of the elastic member acts in a direction for holding the position in the housed state and the photographing state of the camera body. And the arrangement of the support shaft.

[0008] Further, a torque limiter which generates slippage with a constant torque is interposed between the output shaft of the actuator and the link mechanism.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIGS. 1 to 5 show a configuration of a monitoring camera mounted on a vehicle according to a first embodiment of the present invention. FIG. 1 is a top view showing the inside of a storage container, FIG. 4 is a side view as viewed from the right side of FIG. 1, FIG. 4 is a side view as viewed from the left side of FIG. 1, and FIG. 5 is a partial cross-sectional view in which the driving unit is enlarged. In the figure, reference numeral 13 denotes an in-vehicle video camera (hereinafter referred to as a camera main body), 14 denotes an actuator provided on an upper portion of the camera main body 13, and 15 denotes a bottom cover. And is rotatably attached to a bearing 19 of a support 18 fixed to a storage container 17 by a support shaft 16 provided on the camera body 13.

Reference numeral 20 denotes an output shaft of the actuator 14, 21
Is a drive member fixed to the output shaft 20, 22 is a rotatably supported by the drive member 21, and is a driven member driven by the drive member 21 with a constant friction torque by the load of the spring 23; Is a fixing washer that holds one of them. Reference numeral 26 denotes an arm integrally formed with the driven member 22, and one end 27 is rotatably connected to the arm 26 by a connecting pin 28, and the other end is rotatably connected to a predetermined position of the support 18 by a connecting pin 29. The linked link 30 is a spring hook 31 provided on the camera body 13 and a spring hook 32 provided on the support 18.
And a spring 33 for applying a tensile load between the camera body 13 and the support 18, and a stopper 33 for regulating the amount of movement of the camera body 13.

When the output shaft 20 of the actuator 14 drives the driven member 22 in the counterclockwise direction as viewed from the side of FIG. The actuator 14 and the camera body 13 are stored in the storage container 17 in the state shown by the solid line in the drawing by the reaction force, and the bottom cover 15 closes the bottom surface of the storage container 17. The functional member is protected from the wind and rain, and is provided between the spring hook 31 of the camera body 13 and the spring hook 32 of the support 18 as shown in FIG. Since the camera body 13 is located inside the support shaft 16 that supports the camera body 13, the component force of the vector of the pulling load acts in the direction in which the bottom cover 15 closes, and the camera body 13 is stored. To hold on.

Conversely, when the output shaft 20 of the actuator 14 drives the driven member 22 clockwise, the link 2
7, a force acts in a direction in which the fixed support 18 is pulled, and the integrated camera body 13, the actuator 14, and the bottom cover 15 rotate about the support shaft 16 of the camera body 13 as shown in FIGS. As shown by the dotted line 4, the camera body 13 is pushed out from the bottom surface of the storage container 17 so that imaging can be performed.
Is located outside the support shaft 16 of the camera body 13 and a force acts in a direction of pushing the camera body 13.
Is fixed to the stopper 33 with its position regulated.

As described above, since the fulcrum for moving the camera body 13 to the image pickup position is provided on the camera itself, the vibration of the camera body 13 due to the vibration of the vehicle body is extremely small, and the vector of the tension load of the spring 30 is further reduced. Since the component force acts in the direction of pressing the camera body 13 against the stopper 33, the vibration is suppressed, and the image on the monitor does not blur. Further, since the output shaft 20 of the actuator 14 transmits torque to the arm 26 by the friction torque between the drive member 21 and the driven member 22, when the force is applied from the outside to the camera body 13 or the bottom cover 15 in the closing direction. The spring 23
When the frictional torque exceeds the value set in the above, the drive member 21 and the driven member 22 slip, and the actuator 14 is protected from being damaged due to excessive force being applied thereto. Opening and closing is also possible.

[0014]

As described above, according to the on-vehicle surveillance camera of the present invention, the fulcrum for rotating the camera body between the imaging position and the storage position is provided on the camera body. The distance between the camera and the camera body is extremely short, blurring of the image due to vibration can be prevented, vibration is suppressed by the fixing force of the camera by the spring, a stable monitor image is obtained, and the actuator is integrated with the camera. Since the mechanism for rotating the camera is a simple link mechanism, the size of the apparatus can be reduced and the number of parts can be reduced.Also, a drive unit using friction torque is interposed in driving the camera body by the actuator. , Which has a function as a torque limiter, which prevents damage to the actuator due to external force and enables manual opening and closing. In which it is possible to obtain a placing surveillance cameras.

[Brief description of the drawings]

FIG. 1 is a top view showing a configuration of an on-vehicle surveillance camera according to Embodiment 1 of the present invention.

FIG. 2 is a front view showing the configuration of the on-vehicle monitoring camera according to Embodiment 1 of the present invention;

FIG. 3 is a side view showing the configuration of the on-vehicle monitoring camera according to Embodiment 1 of the present invention;

FIG. 4 is a side view showing the configuration of the on-vehicle monitoring camera according to Embodiment 1 of the present invention;

FIG. 5 is a partial cross-sectional view showing a configuration of a driving part of the vehicle-mounted surveillance camera according to Embodiment 1 of the present invention.

FIG. 6 is an external view showing a configuration of a conventional in-vehicle monitoring camera.

[Explanation of symbols]

Reference Signs List 13 camera body, 14 actuator, 15 bottom cover, 16 support shaft, 17 storage container, 18 support, 19 bearing, 20 output shaft, 21 drive member, 22 driven member, 23 spring, 25 arm, 27 link, 28 connecting pin , 29 binding pins,
30 spring, 31, 32 spring hook, 33 stopper,

Claims (4)

[Claims] A camera body integrally formed with an actuator, a support body rotatably supporting the camera body via a support shaft, a storage container for holding and fixing the support body and storing the camera body, An on-vehicle surveillance camera, comprising: a link mechanism provided between an output shaft of the actuator and the support, for transmitting torque of the output shaft as a rotating force of the camera body. 2. The in-vehicle surveillance camera according to claim 1, wherein a bottom cover for closing a bottom surface of the storage container is formed integrally with the camera body. 3. An elastic member for applying a tensile load is provided between the camera body and the support so that the load of the elastic member acts in a direction for holding the position in the housed state and the photographing state of the camera body. 3. The in-vehicle surveillance camera according to claim 1, wherein an arrangement of the load axis and the support axis is set. 4. The on-vehicle monitoring system according to claim 1, wherein a torque limiter that generates slippage with a constant torque is interposed between the output shaft of the actuator and the link mechanism. camera.