JPH07219036A - Turntable for camera unit - Google Patents

Abstract

PURPOSE:To provide a turntable of a camera unit where the turning shift of a housing part caused by inertial force is small at the time of turning. CONSTITUTION:As for the turntable of the camera unit provided with a fixed table 6, a turning part 3 provided at the fixed table 6 and the housing part 1 which incorporates a camera main body 10 and where housing part side tilt slide surfaces 1e and 1e at its bottom part abut on the turning part side tilt slide surfaces 2c and 3a on the side of the turning part 3 and are connected to the side of the turning part 3 to be capable of tilting, the turntable is provided with a slide groove 2a and a slide projected line 1a provided at a position most apart in the tilt direction from the turning shaft center of the turning part 3 on the turning part side tilt slide surface 2c an the housing part side tilt slide surface 1e and sliding in the tilt direction and also regulating a shift in the turning direction between the housing part 1 and the turning part 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary base for a camera unit, and more particularly to a rotary base for a camera unit having a tilt mechanism.

[0002]

2. Description of the Related Art A camera base for mounting an image pickup camera used for surveillance or the like is mounted on a rotary base for manually moving the camera up and down in order to expand the image pickup setting range of the camera not only in the rotation direction but also in the vertical direction. It has a tilt mechanism that can be changed in direction and fixed.

Previously, the tilt mechanism was to loosen the fixing each time and perform the desired tilt again to fix it again. Recently, however, a tilt mechanism that does not have a fixing means and can be tilted with one touch is provided. ing.

The structure of a conventional example of a rotary base of a camera unit equipped with this type of tilt mechanism will be described with reference to FIGS. 1 and 6 to 9.

FIG. 1 is a perspective view showing the outer appearance of the basic structure of a rotary base of a camera unit of this type. The rotating unit of the camera unit holds the camera body 10 inside and changes the vertical direction. 1, a rotating unit 3 that holds and rotates the housing 1 via a tilt mechanism, and a fixed base 6 that holds the rotating unit 3 rotatably. Although not visible from the outside, a tilt mechanism that tilts the housing 1 in the vertical direction is provided between the housing 1 and the rotating portion 3.

The internal structure of the conventional example will be described with reference to FIGS.

A rotating mechanism for rotating the casing 1 holding the camera body 10 in the left-right direction is provided in the fixed base 6. This rotation mechanism has a drive source 7, a speed reducer 8, and a gear 4.

On the protruding portion 4a on the upper surface of the gear 4, a rotating portion 3 having a tilt slide surface on the upper surface, and a housing tilt member 2 having a tilt slide surface on the lower surface are provided. Are arranged on the upper side and are fixed by two screws 5 and 5 via spacer prismatic portions 2b and 2b forming a holding space for holding a part of the outer shell of the housing 1. Then, the slide portion of the bottom outer shell of the housing 1 is sandwiched in the sandwiching space formed between the both tilt slide surfaces in a state in which it can be tilted in the vertical direction.

After the above fixing is completed, the camera body 10 is attached and the upper portion 1d of the housing 1 is attached.

On the lower surface of the gear 4, a protrusion 4b for restricting rotation is provided.
Then, the sensor 9 detects the passage of the protrusion and reverses the rotation. The reversal of this rotation may be performed by software control.

With the above structure, the frictional resistance between the two tilt slide surfaces and the bottom slide portion 1b of the housing 1 becomes appropriate, and the operator can move the housing 1 The housing 1 can be tilted by moving it by hand, but the housing 1 stops at that position when the hand is released.

[0012]

However, in order to enable the one-touch tilt described above, the bottom slide portion 1b of the housing 1 is held in the holding space formed by the housing tilt member 2 and the rotating portion 3. And the space between the sandwiching spaces is determined by the spacer prismatic portions 2b, 2b provided on the lower surface of the housing tilt member 2, and the spacer prismatic portions 2 are formed.
b and 2b have the same structure as shown in FIGS.
It passes through a tilt hole 1c provided at the bottom of the housing 1. Then, the slide in the end face gap A between the inner edge of the tilt hole 1c and the spacer prismatic portions 2b, 2b shown in FIGS. 7 and 8 tilts up and down, and FIGS.
As shown in FIG. 8, a large gap for tilting is provided between the spacer prismatic portions 2b, 2b and the inner end surface of the tilt hole 1c in the tilt direction.

Since the large gap for tilting is required, the spacer prismatic portions 2b, 2b constituting the end face gap A are formed.
The length L _{2 of} b is inevitably short.

When the camera captures an image of a distant object, a slight deviation in the orientation of the camera appears as a large difference on the screen, and therefore it is required that the directional positional accuracy be accurate and the deviation be small.

However, in the configuration of the above conventional example, as shown in FIG.
As shown in FIG. 9, the length of the end face gap A portion that regulates the deviation in the rotation direction is short in order to make a tilt room for the tilt hole 1c provided in the lower portion of the housing 1 as described above. Limited to length L ₂ .

When the housing 1 is rotated and stopped at a predetermined position by the driving of the driving means 7, the housing 1 tends to rotate further due to inertial force even when the rotating portion 3 stops. At this time, if the length L ₂ is short, as shown in FIG. 9, the inner edge of the tilt hole 1c and the spacer prismatic portions 2b and 2b are displaced in the rotational direction until they come into contact with each other until the rotational displacement of the housing 1 is stopped. In addition, there is a problem that the rotation is deviated by a large angle φ ₂ .

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a rotating base for a camera unit, in which the displacement of the casing due to inertial force when rotating is small.

[0018]

In order to solve the above-mentioned problems, a rotary base of a camera unit according to the present invention comprises a fixed base,
The tilt portion provided on the fixed base and the tilt slide surface on the housing side having the camera body built in and on the bottom portion are brought into contact with the tilt slide surface on the tilt portion side on the tilt portion side to tilt to the tilt portion side. In a swivel base of a camera unit having a housing that is operably coupled, the tilt slide surface of the swivel portion side and the tilt slide surface of the housing are the most in the tilt direction from a pivot axis of the swivel portion. It is characterized in that it is provided with a slide groove and a slide ridge which are provided at distant positions, slide in the tilt direction, and regulate a shift in the rotation direction between the housing and the rotation portion.

[0019]

According to the rotary base of the conventional camera unit, the slide in the tilt direction and the regulation of the shift in the rotary direction are performed by the end face gap A between the end face of the tilt hole and the side face of the spacer prism. There is. In this case, as described above, since the length of the cross section of the prismatic portion in the tilt direction is inevitably short, the end face gap A
If the rotation shift is reduced between the housing and the rotating portion, the tilt hole and the spacer prismatic portion are displaced in the rotation direction until they come into contact with each other to regulate the rotation displacement of the housing. In addition, the rotation is deviated by a large angle φ ₂ .

On the other hand, in the turntable of the camera unit according to the present invention, the slide groove and the slide ridge which slide in the tilt direction and regulate the shift in the turn direction between the housing and the turning portion. Are provided at positions on the tilt slide surface on the rotating portion side and the tilt slide surface on the housing side farthest in the tilt direction from the rotation axis of the rotating portion. And the width of the gap between the slide groove and the slide ridge is the same as the gap of the conventional example when the rotation deviation occurs between the housing and the rotation portion. By the time the slide groove and the slide protrusion are displaced in the rotational direction and abut each other to regulate the rotational displacement of the housing, the rotational displacement is only a small angle.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rotary base of a camera unit according to the present invention will be described with reference to FIGS.

This embodiment shown in FIGS. 1 to 5 is shown in FIGS.
The difference from the conventional example shown in FIG. 3 is that as shown in FIGS.
In the slide contact surface between the tilt tilt surface 2c of the housing tilt member 2 and the tilt slide surface 2c of the housing tilt member 2, a position farthest in the tilt direction from the rotation axis of the tilt portion 3 of the tilt tilt surface 2c of the tilt portion. A slide groove 2a in the tilt direction is provided, and the slide groove 2a is slid in the tilt direction on the case side tilt slide surface 1e on the inner surface of the case 1, and the case 1
That is, the slide protrusion 1a for restricting the shift of the rotation direction between the rotation unit 3 and the rotation unit 3 is provided. In this embodiment, the slide ridges 1a and the slide grooves 2a are provided as slide contact surfaces between the housing-side tilt slide surface 1e on the inner surface of the housing 1 and the rotating portion-side tilt slide surface 2c of the housing tilt member 2. However, it may be provided on a slide contact surface between the housing-side tilt slide surface 1e on the outer surface of the housing 1 and the rotating portion-side tilt slide surface 3a of the rotating portion 3.

Since the structure other than the above is the same as the conventional example,
The same parts are designated by the same reference numerals and the description thereof is omitted.

The tilting operation and rotating operation of this embodiment will be described with reference to FIGS. 4 and 5.

4 and 5, the gap between the slide protrusion 1a and the slide groove 2a is A, and the length of the slide groove 2a is L ₁ .

In FIG. 5, the rotating portion 3 rotates in the Z direction and stops at a predetermined position, the housing 1 further rotates by inertial force, and slides on the upper and lower ends of the slide groove 2a in FIG. The state where the ridge 1a and the slide groove 2a are in contact with each other while being displaced by the gap A and is displaced by an angle φ ₁ and stopped is shown.

If the gap A of the present embodiment shown in FIG. 5 and the gap A of the conventional example shown in FIG. 9 are equal, then L ₁ ≧ L ₂ , so that tan φ ₁ = A / L ₁ <tan φ ₂ = A The relationship of / L ₂ is established, and φ ₁ <φ ₂ can be proved. That is, in the present embodiment, the deviation in the turning direction after turning and stopping is smaller than in the conventional example.

[0028]

According to the present invention, the rotating base of the camera unit has a slide groove and a slide ridge that slide in the tilt direction and restrict the shift in the rotating direction between the housing and the rotating portion. The tilt slide surface on the moving part side and the tilt slide surface on the housing side
Since it is provided at a position farthest from the rotation axis of the rotation portion in the tilt direction, it does not increase the number of parts as compared with the conventional example, and the deviation in the rotation direction after rotation and stop is achieved. Since it is possible to reduce the size, it is possible to improve the setting accuracy of the monitoring range at low cost when an imaging camera used for monitoring or the like is attached.

[Brief description of drawings]

FIG. 1 is a perspective view of a rotation base of a camera unit.

FIG. 2 is a vertical cross-sectional view of an embodiment of a turntable of a camera unit according to the present invention.

FIG. 3 is a transverse cross-sectional view of an embodiment of a turntable of the camera unit of the present invention.

FIG. 4 is a horizontal sectional view of an embodiment of a turntable of the camera unit of the present invention.

FIG. 5 is a diagram showing an operation of the embodiment.

FIG. 6 is a vertical cross-sectional view of a rotary base of a conventional camera unit.

FIG. 7 is a cross-sectional view of a rotary base of a conventional camera unit.

FIG. 8 is a horizontal sectional view of a rotary base of a conventional camera unit.

FIG. 9 is a diagram showing an operation of a conventional example.

[Explanation of symbols]

 1 Housing 1a Sliding ridge 1b Housing upper part 1c Tilt hole 1d Housing lower part 1e Housing side tilt slide surface 2 Housing tilt member 2a Slide groove 2b Spacer prismatic portion 2c Rotation part side tilt slide surface 3 Rotating base 3a Rotating part side tilt slide surface 4 Gear 4a Projection part 4b Protrusion 5 Screw 6 Fixing stand 7 Drive source 8 Reduction gear 9 Sensor 10 Camera body

Claims (1)

[Claims] 1. A fixed base, a rotating portion provided on the fixed base, and a housing-side tilt slide surface that has a camera body built in and is provided on the bottom portion of the fixed base, and the tilt slide surface on the rotating portion side contacts the tilt slide surface. In a swivel base of a camera unit having a housing that is in contact with and is tiltably coupled to the swivel unit side, in a swivel unit of the swivel unit side tilt slide surface and the chassis side tilt slide surface, A slide groove and a slide ridge that are provided at a position most distant from the rotation axis in the tilt direction, slide in the tilt direction, and restrict a shift in the rotation direction between the housing and the rotation portion. A turntable for a camera unit, which is provided with.