CN207665064U - Photographic device - Google Patents

Abstract

The utility model provides a kind of photographic device comprising：Camera unit, it includes photographing element and lens units；Rotating part can support the camera unit by the camera unit in a manner of pitching rotation；And；Fixed part can support the rotating part in a manner of flat turn rotation by the rotating part, in the photographic device, include between the rotating part and the fixed part：Multiple balls, multiple ball annularly configure；Retainer keeps the multiple ball；And elastic component presses the rotating part to the fixed part side in the inside for leaning on the direction orthogonal with flat turn rotation axis than the multiple ball.It by configuring retainer and multiple balls between flat turn rotating part and fixed part, and is pressed using elastic component, to remove the chimeric loosening around flat turn rotation axis, and reduces load-torque caused by friction and worn away with sliding.

Description

Photographic device

Technical field

The utility model is related to a kind of bearings for the surveillance camera device that can be acted in flat turn pitch orientation Construction.

Background technology

For being set to the surveillance camera device of ceiling, metope, for purpose beautiful in building, exist In order not to substantially be protruded from setting face, and the case where ceiling, metope punch and are arranged with being embedded to.In recent years, in order to reality Even if existing do not nor affect on beautiful setting in ceiling, metope punching, it is expected that by video camera itself miniaturization, particularly the low back of the body Change.

As miniaturization, the existing example of the flat turn pitching type video camera of low back, there is dome type surveillance camera (Japan Special open 2013-197966 bulletins).It is characterized in that, camera unit, flat turn motor and pitch motor and power transmit Portion is located on the same plane vertical with flat turn rotation axis.

In addition, even for minimizing like this, for the flat turn pitching type video camera of low back, along with lens unit High magnification, photographing element high pixelation, also begin to the high-precision for requiring flat turn pitching motion.

The existing example of video camera as the operation precision for improving flat turn pitching, there is camera assembly (Japanese Patent Publication No. No. 5972713).The camera assembly is characterized in that thering is first gear mechanism and second gear mechanism, wherein the first tooth Wheel mechanism by the rotational deceleration for the first motor for being equipped on fixing component and is transferred to movable link, makes movable link around first Axis rotates, and second gear mechanism is by the rotational deceleration for the second motor for being equipped on movable link and is transferred to video camera, makes Camera intrinsic second axis rotates.And the camera assembly has the first force application component, at this point, the first force application component is by can Dynamic component is pressed along first axle direction and is pressed in fixing component, to inhibit rotation of the movable link around first axle. Be intended to by the miniaturization of flat turn pitching type video camera, in the case of low back, due to the fitting portion on flat turn rotation axis be configured at The position of lens unit optical axis and pitching rotating shaft direct cross, and be lens unit rotated along with pitching and mobile range it Outside, therefore, it is difficult to ensure chimeric length.If the chimeric length on flat turn rotation axis is shorter, orthogonal with flat turn rotation axis Direction, the rotation loosening i.e. in pitch orientation becomes larger.

As also being disclosed in existing technical literature, by the way that movable link is pressed along flat turn rotation axis direction And press in fixing component, movable link can be inhibited around the rotation of flat turn rotation axis, and can also inhibit to rotate with flat turn The chimeric loosening in the direction of axis vertical take-off.However, there are the following problems：Due to pressing movable link and pressed in fixed structure Part, therefore sliding abrasion can be rotatably generated with flat turn in contact site.

In order to transmit the signal come from photographing element, flat turn pitching type video camera has lens unit and is configured at fixation The cable of the electric substrate connection of component.Since cable can be bent because of the position of flat turn pitching, posture, be reversed, saturating The movable link of mirror unit and supporting lens unit is applied with the reaction force from cable.

In order to inhibit the chimeric loosening in the direction orthogonal with flat turn rotation axis, by movable link to flat turn rotation axis side Pressure to pressing in fixing component has to be larger than the torque generated by cable reaction force.The pressure of pressing is bigger, and can Dynamic component and the contact site anomaly of fixing component rotate bigger at a distance from shaft axis, and torque is more advantageous, but in sliding abrasion, electricity It can become unfavorable in terms of the flat turn rotating drive torque of motivation.

The solution to the problem

The photographic device of the utility model includes：Camera unit, it includes photographing element and lens units；Rotating part, It can support the camera unit by the camera unit in a manner of pitching rotation；And；Fixed part, with the rotation The mode that flat turn rotation is capable of in transfer part supports the rotating part, in the photographic device, in the rotating part and the fixed part Between include：Multiple balls, multiple ball annularly configure；Retainer keeps the multiple ball；And elastic component, Than the inside that the multiple ball leans on the direction orthogonal with flat turn rotation axis, the rotating part is pressed to the fixed part side. If constituting in the above described manner, rotating part on the direction orthogonal with flat turn rotation axis to be applied with the state quilt of torque load Fixed part supports, therefore no matter how the chimeric length on flat turn rotation axis can remove chimeric loosening.Further, since rotation Transfer part is contacted via multiple balls with fixed part, so that rotating part is rotated around flat turn rotation axis by making multiple balls roll, therefore Sliding can be inhibited to wear away.And the closer position of distance by the way that elastomeric member configuration to be rotated to shaft axis in anomaly, can Reduce sliding load, rotating part is made to be rotated around flat turn rotation axis with smaller driving torque.

In addition in other technologies scheme, which is characterized in that the retainer is annulus shape, for the video camera list For any one posture of member in the pitch direction, at least part of the camera unit is configured at the circle of the retainer The inside of ring-shaped.

In addition in other technologies scheme, which is characterized in that the retainer that can be with the flat turn rotation axis The mode of center rotation configures.

In addition in other technologies scheme, which is characterized in that the fixed part has the rolling for limiting the multiple ball The ring-type groove portion in dynamic path, the retainer are the punching parts of the flaky material with multiple holes, and feelings are overlooked in multiple hole It is overlappingly arranged with the ring-type groove portion under condition.

In addition in other technologies scheme, which is characterized in that the elastic component is annulus shape, is rotated with the flat turn It is configured centered on axis.

To apply larger torque load on the direction orthogonal with flat turn rotation axis, ball, which is configured at anomaly, to be rotated Axis is advantageous apart from remote position.By the way that the retainer at the interval of ball will be maintained to be formed as annulus shape, and at it Inside configuration camera unit, can inhibit the size of photographic device in the height direction, realize miniaturization, low back.

According to the description of embodiment (with reference to attached drawing), the other feature of the utility model will become obvious below.

Description of the drawings

Fig. 1 is the exploded perspective view of the flat turn pitching type video camera of the embodiment of the utility model.

Fig. 2 is the sectional view of the flat turn pitching type video camera of the embodiment of the utility model.

Specific implementation mode

Hereinafter, illustrating the embodiment of the utility model.Fig. 1 is that the flat turn pitching type of the embodiment of the utility model is taken the photograph The exploded perspective view of camera.Electric substrate 14, connector cover 16 and motor unit 15 are installed in bottom case 12.In addition, inner casing 13 It is integrally installed on bottom case 12, so far forms fixed part.

Inner casing 13 has the ring-type groove portion rolling path for limiting multiple balls 24, coaxial with flat turn rotation axis 13a.Retainer 23 is annulus shape, and retainer 23 has multiple hole portion 23a, multiple hole portion 23a and the ring-type groove portion 13a Arranged on same Radius, retainer 23 be configured at inner casing 13, be formed on the face of ring-type groove portion 13a.Multiple balls 24 are distinguished Multiple hole portion 23a of the embedded retainer 23, interval and position by limiting are held in multiple hole portion 23a.Retainer 23 The mutually linkedly flat turn rotation centered on flat turn rotation axis can be moved with the rolling of the multiple ball 24.

There is protrusion 21a in flat turn rotating part 21, protrusion 21a is for limiting retainer 23 in flat turn rotation axis side Upward movement.Due to the embedded ring-type groove portion 13a of a part for the shape of the multiple ball 24, and retainer 23 is by described prominent Portion 21a limitation movements are played, therefore multiple hole portion 23a of retainer 23 are always contacted with multiple balls 24 at its maximum gauge.Cause Even if this retainer 23 is simple shape as the punching parts of flaky material, multiple balls 24 will not be detached from and more portal Portion 23a.

Flat turn rotating part 21 by with bottom case 12, with flat turn rotation axis be same axis direction on protrusion 12a It is fitted into position.In addition, flat turn rotating part 21 leads at the inside than multiple balls 24 by the direction orthogonal with flat turn rotation axis While crossing pressing of the elastic component 25 by the downside (fixed part side) towards flat turn rotation axis direction, using baffle ring 26 with The mode for capableing of flat turn rotation is installed on bottom case 12.Also, flat turn rotating part 21 is supported by the multiple ball 24, by the portion Divide the sliding friction that can be reduced flat turn rotation by the pressing, load-torque.

Flat turn rotating part 21 has helical gear, can make flat turn rotating part 21 by the worm screw of drive motor unit 15 It is rotated up in flat turn side.Cable 27 is installed in inner casing 13, cable 27 is used to convey signal from lens unit 31.In lens list Member 31 is equipped with pitching gear hub 32 and shells of lenses 33.Pitching gear hub 32 have rotary shaft, by by rotary shaft be set to The bearing portion of elevation axis bearing plate 29 is chimeric, to make pitching gear hub 32 can be supported in a manner of pitching rotation.Pitching branch Board 29 is integrally installed on flat turn rotating part 21.In addition, pitching gear hub 32 has helical gear, can be fixed by driving Pitching gear hub 32 is set to rotate in the pitch direction in the worm screw of the motor unit 28 of flat turn rotating part 21.

Retainer 23 has can be by the camera unit comprising lens unit 31, pitching gear hub 32 and shells of lenses 33 At least part is accommodated in internal annulus shape.By the way that camera unit to be configured to the inside of tubular shape, can will put down Turn pitching type video camera low back.

Elastic component 25 is annulus shape, is configured centered on flat turn rotation axis.

While inner cover 22 guides cable 27 in the state of being bent cable 27, it is integrally installed on flat turn rotation Transfer part 21.In addition, being provided with hole portion in inner cover 22 so that revolved in lens unit 31, pitching gear hub 32 and 33 pitching of shells of lenses When turning, do not interfere with each other.In overhead guard 11, with no matter lens unit 31 is in what what kind of flat turn pitch attitude can photograph Mode integrally installed with transparent hemispherical dome, and is fixed on bottom case 12.

Fig. 2 indicates the sectional view of the flat turn pitching type video camera of the utility model.Flat turn rotating part 21 by with bottom case Fitting portion 12a is chimeric to be positioned on horizontal plane direction, by being hung down in multiple balls 24 by the pressing of elastic component 25 Histogram is positioned upwards, and thereby, it is possible to inhibit the loosening in the direction orthogonal with flat turn rotation axis.

The power Fw that elastic component 25 presses flat turn rotating part 21 needs to be set according to the reaction force Fc of the cable 27 of bending. In the radius of this elastic component 25, i.e., between the contact point of flat turn rotating part 21 and elastic component 25 and flat turn rotation axis center Distance be Rw, the radius configured with multiple balls 24 is Rb, the position and flat turn rotary shaft that the reaction force Fc of cable 27 occurs The distance between line center is Rc.Using unilateral ball as fulcrum, torque Fw × Rb of the pressing force Fw of elastic component is at least needed It is greater than torque Fc × (Rb+Rc) of the reaction force Fc of cable 27.If being less than, ball liter of the flat turn rotating part 21 from unilateral side It rises, flat turn rotating part 21 and the lens unit 31 supported tilt.

In the present embodiment, though being set as the reaction force of cable, according to the setting posture of flat turn pitching type video camera, also It is applied with torque Fp × Rb of the gravity Fp of the flat turn rotary unit comprising flat turn rotating part 21, lens unit 31.

The coefficient of sliding friction of flat turn rotating part 21 and elastic component 25 is set as μ, then 21 flat turn of flat turn rotating part is made to revolve It is μ × Fw × Rw to turn required torque.Due to being rolling friction with the contact site of multiple balls 24, it is hardly applied with load Lotus torque, but in the case where the part is sliding friction, it is also necessary to the driving torque of μ × Fw × Rb.In addition, elastic component 25 Sliding distance with flat turn rotating part 21 is 2 π × Rw, but in the case where being sliding friction with the contact site of multiple balls 24, should Partial sliding distance becomes 2 π × Rb, with the abrasion increase of flat turn rotation, durability deterioration.

It is the embodiment of the flat turn pitching of the utility model above.If it is constituted as this embodiment, then by with Flat turn rotation axis applies torque load on orthogonal direction, and the chimeric length even if on flat turn rotation axis can remove short It is chimeric to loosen, flat turn video camera can be minimized, low back.In addition, rotating shaft by got higher in torque load, anomaly Line configures multiple balls apart from remote position, and the driving torque and sliding that can reduce flat turn rotation are worn away, and can be improved resistance to Long property.

Although describing the utility model with reference to embodiment, but it is to be understood that it is public that the utility model is not limited to institute The embodiment opened, the scope of the claims should be endowed broadest explanation to cover all such modifications and equivalent structure And function.

This application claims Japanese patent application (No.2016-249801), the priority of the applying date (2016/12/22), with And Japanese patent application (No.2017-099067), the priority of the applying date (2017/05/18), the application reference are above preferential The full content of power.

Claims (6)

1. a kind of photographic device, has：

Camera unit, it includes photographing element and lens units；

Rotating part can support the camera unit by the camera unit in a manner of pitching rotation；And

Fixed part can support the rotating part by the rotating part in a manner of flat turn rotation, and the feature of the photographic device exists In including between the rotating part and the fixed part：

Multiple balls, multiple ball annularly configure；

Retainer keeps the multiple ball；And

Elastic component, than the multiple ball lean on the direction orthogonal with flat turn rotation axis inside, by the rotating part to The fixed part side pressing.

2. photographic device according to claim 1, which is characterized in that

The retainer is annulus shape, described for any one posture of the camera unit in the pitch direction At least part of camera unit is configured at the inside of the annulus shape of the retainer.

3. photographic device according to claim 2, which is characterized in that

The retainer is configured in the way of it can be rotated centered on the flat turn rotation axis.

4. photographic device described in any one of claim 1 to 3, which is characterized in that

It is with multiple that the fixed part, which has the ring-type groove portion of the rolling path for limiting the multiple ball, the retainer, The punching parts of the flaky material in hole, multiple hole are overlappingly arranged in vertical view and the ring-type groove portion.

5. photographic device described in any one of claim 1 to 3, which is characterized in that

The elastic component is annulus shape, is configured centered on the flat turn rotation axis.

6. photographic device according to claim 4, which is characterized in that

The elastic component is annulus shape, is configured centered on the flat turn rotation axis.