JPH06214146A - Zoom servo controller - Google Patents

Abstract

PURPOSE:To stably obtain a low zooming speed without hand fatigues. CONSTITUTION:A thumb ring 23 is fitted on the outside diameter of a grip 22 in a controller main body 21. A shaft 24 is fixed on the thumb ring 23, and the shaft 24 is supported by a bearing 25 installed on the grip 22. And also, a potentiometer 28 is connected with the shaft 24, the output of the potentiometer 28 is connected with a zoom driving signal generation circuit 29. The output of the zoom driving signal generation circuit 29 is connected with a zoom lens main body through a connector 31. Further, a seesaw switch 32 is attached at the lower inside of the grip 22, a rubber 37 is installed on the leading end face of the seesaw switch 32. By operating the seesaw switch 32 and pressing the rubber 37 against the shaft 24, the thumb ring 23 is held in an inclined state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zoom servo controller for speed servo-driving control of zooming of a television zoom lens.

[0002]

24 is a block diagram of a conventional example of a zoom servo controller, and FIG. 25 is a sectional view taken along the line ZZ of FIG. FIG. 26 is a circuit configuration diagram of a conventional example. Controller body of zoom servo controller 1
A thumb ring 3 that functions as a heart-shaped zoom speed operation ring and that is operated by a thumb is mounted on the outer diameter of the grip 2 for holding the. Thumb ring 3
A shaft 4 is fixed to the shaft 4, and the shaft 4 is supported by a bearing 5 provided on the grip 2. Further, when the holding of the rotation of the thumb ring 3 by hand is stopped by the plate cam 6 provided on the shaft 4 and the fixing pin 7 fixed to the grip 2, the thumb ring 3 is configured to return to the zero point. There is. Further, a potentiometer 8 is connected to the shaft 4, and the output of the potentiometer 8 is connected to a zoom drive signal generating circuit 9. Zoom drive signal generation circuit 9
The variable speed knob 10 provided on the surface of the controller body 1 is also connected to the input of. The output of the zoom drive signal generation circuit 9 is connected to a zoom lens body (not shown) via a connector 11.

When the thumb ring 3 is tilted left and right with respect to the grip 2 as shown in FIG. 25, its rotation angle is detected by the potentiometer 8, and the detected rotation angle and the set range of the speed variable knob 10 are set. Zoom drive signal X
(t) is output from the zoom drive signal generating circuit 9 to perform zooming of the zoom lens body (not shown). Here, by operating the variable speed knob 10, it is possible to select the entire zoom range, that is, the speed range from the wide end to the tele end. As shown in FIG.
The highest speed zooming can be performed by tilting the thumb ring 3 to the maximum (θ _MAX ) with 0 set to the high speed range (MAX).

[0004]

In recent years, with the diversification of photographing, high-speed zooming of 0.5 seconds is performed over the entire zoom range, while ultra-low-speed zooming of 5 minutes or more is performed over the entire zoom range. ing. However, in the above-mentioned conventional example, although the operation to obtain the maximum speed is easy, the thumb ring 3 must be held at a minute rotation angle for a long time in order to carry out ultra-low speed zooming, which makes the hand feel tired and slow. There is a drawback that the zoom speed cannot be obtained stably.

An object of the present invention is to provide a zoom servo controller which can stably obtain a low zoom speed without hand fatigue.

[0006]

A zoom servo controller according to a first aspect of the present invention for achieving the above object is characterized in that a means for fixing a tilt of a zoom speed operation ring attached to a grip in a rotational direction is provided. And

Further, the zoom servo controller according to the second aspect of the present invention is provided with a constant speed automatic zooming circuit for transmitting a constant speed drive signal according to the tilt angle of the rotating method of the zoom speed operation ring attached to the grip. Characterize.

A zoom servo controller according to a third aspect of the present invention is characterized in that an ultra-low speed zooming dedicated circuit for transmitting an ultra-low speed drive signal is provided by a changeover switch attached to the main body.

[0009]

The zoom servo controller according to the first aspect of the present invention having the above-described structure can hold the zoom speed operation ring at an arbitrary rotation angle by providing means for fixing the tilt angle of the zoom speed operation ring in the rotation direction.

The zoom servo controller of the second invention is
By installing an auto-zooming circuit in the controller body, constant-speed zooming can be automatically performed without holding the zoom speed operation ring.

The zoom servo controller of the third invention is
By providing a circuit for ultra-low speed zooming inside the controller body, ultra-low speed zooming can be performed automatically without holding the zoom speed operation ring.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 is a configuration diagram of a sumo servo controller according to the first embodiment, and FIG. 2 is a sectional view taken along line XX of FIG. Further, FIG. 3 is an enlarged view of a main part near the seesaw switch of the first embodiment. On the outer diameter of the grip 22 for holding the controller body 21,
A heart-shaped thumb ring 23 is attached. A shaft 24 is fixed to the thumb ring 23, and the shaft 24 is pivotally supported by a bearing 25 provided on the grip 22. Further, the plate cam 26 provided on the shaft 24 and the fixing pin 27 fixed to the grip 22 are configured to return the thumb ring 23 to the zero point when the holding of the rotation of the thumb ring 23 by hand is stopped. There is.

Further, a potentiometer 28 is connected to the shaft 24, and the output of the potentiometer 28 is connected to a zoom drive signal generating circuit 29. A speed variable knob 30 provided on the surface of the controller body 21 is also connected to the input of the zoom drive signal generation circuit 29. The output of the zoom drive signal generation circuit 29 is the connector 3
1 to the zoom lens body. Furthermore,
An M-shaped seesaw switch 32 is attached by a shaft 33 inside the grip 22.
It is configured to rotate right and left with the fulcrum as a fulcrum. Axis 33
In the vertical grip 22 of the
The seesaw switch 3 is pushed by the compression coil spring 34.
A ball 36 is provided which fits in the hemispherical holes 35a and 35b provided in the No. 2 and which fixes the seesaw switch 32. Further, a rubber 37 is attached to the left end surface of the seesaw switch 32.

When the thumb ring 23 is tilted with respect to the grip 22 as shown in FIG. 2, the rotation angle is detected by the potentiometer 28, and the zoom drive is performed according to the detected rotation angle and the set range of the speed variable knob 30. A signal is output from the zoom drive signal generation circuit 29 to perform zooming of the zoom lens body. Further, as shown in FIG. 1, when the ball 36 is fitted in the hole 35a, the rubber 37 is pressed against the shaft 24, and the frictional force thereof causes the shaft 24 to move.
The thumb ring 23 connected to is held in an inclined state. On the contrary, as shown in FIG.
In the state of being fitted to b, the rubber 37 is separated from the shaft 24, and the thumb ring 23 connected to the shaft 24 is in a free state.

The variable speed knob 30 is set to the low speed range (M
When the thumb ring 23 is tilted in the state (IN) and the thumb ring 23 is held by the seesaw switch 32 at a position where the desired zoom speed is obtained, a stable low zoom speed can be obtained without hand fatigue.

FIG. 4 is a block diagram of the zoom servo controller according to the second embodiment, and FIG. 5 is a sectional view taken along line XX of FIG. Further, FIG. 6 is an enlarged view of a main part near the seesaw switch 32. Since the same reference numerals as those in the first embodiment are members having the same functions, the description thereof will be omitted.
In the second embodiment, the seesaw switch 32 and the like are provided in the portion of the thumb ring 23, and the same effect as that of the first embodiment can be obtained.

FIG. 7 is a block diagram of the zoom servo controller of the third embodiment, and FIG. 8 is a sectional view taken along the line YY of FIG. 9 is a front view of the surface of the controller main body 21 on the grip 22 side, and FIG. 10 is an enlarged view of a main part near the slide switch.

A slide switch 38 that slides back and forth in the thumb ring 23 is provided at the thumb operation portion of the thumb ring 23, and a pin 39 is provided at the tip of the slide switch 38. In addition, a plurality of holes 40 for fitting the pins 39 to hold the thumb ring 23 are provided on the surface of the controller body 21 with respect to the grip 22, and an index 41 is written near each hole 40. .

By sliding the slide switch 38 and engaging the pin 39 with the hole 40 to hold the thumb ring 23 tilted with respect to the grip 22, a desired zoom speed can be stabilized without hand fatigue. Obtainable. Further, the index 41 near the hole 40 makes it easy to reproduce the already selected zoom speed. Here, it is apparent that if the diameters of the pins 39 and the holes 40 are reduced and the number of the holes 40 is increased, the selectable zoom speed is increased.

FIG. 11 is a block diagram of the zoom servo controller of the fourth embodiment, and FIG. 12 is a sectional view taken along the line XX of FIG. 13 and 14 are circuit configuration diagrams of the fourth embodiment.

The output of the zoom drive signal generating circuit 29 is connected to the auto-zooming circuit 45, and the output of the auto-zooming circuit 45 is connected to the zoom lens body via the connector 31. An auto-zooming switch 46 provided on the thumb ring 23 is also connected to the input of the auto-zooming circuit 45.

When the auto zooming switch 46 is off, the range of the speed variable knob 30 and the thumb ring 23 are used as a normal controller as shown in FIG.
The drive signal X (t) output from the zoom drive signal generation circuit 29 according to the rotation angle is output as it is.

On the other hand, when the auto-zooming switch 46 is turned on, the auto-zooming circuit 45 operates as shown in FIG. 14, and the drive signal X (t
0) is continuously output regardless of the subsequent drive signal X (t). After that, if the auto zooming switch 46 is turned off, the operation returns to normal, and the drive signal X (t) output from the zoom drive signal generating circuit 29 at that time is output. If the drive signal X (t) at this time is 0, zooming is stopped.

When the desired zoom speed is obtained by tilting the thumb ring 23, the auto zooming switch 46
If is turned on, even if the thumb ring 23 is released, zooming is automatically performed at the speed at the time of switching on. In particular, if the variable speed knob 30 is set in the low speed range (MIN) in advance, ultra-low speed automatic zooming is possible.

FIG. 15 is a block diagram of the zoom servo controller of the fifth embodiment. The output of the auto-zooming circuit 45 is connected to the zoom lens main body via the connector 31, and is also connected to the display unit 48 provided on the surface of the controller main body 21 via the zoom speed display circuit 47. . From the zoom drive signal output from the auto-zooming circuit 45, the zoom speed of the zoom lens main body is displayed by the zoom speed display circuit 47 and the display unit 48.
Display using.

FIG. 16 is a front view of the surface of the controller body 21 of the zoom servo controller of the sixth embodiment on the grip 22 side. Grip 22 of the controller body 21
A mechanical graduation 49 is provided on the surface opposite to.

The fifth and sixth embodiments are effective as a guide for reproducing the already selected zoom speed.

FIG. 17 is a block diagram of the zoom servo controller of the seventh embodiment. 18 is a plan view seen from the direction A of FIG. 17, FIG. 19 is a front view seen from the direction B of FIG. 17,
20 and 21 are circuit configuration diagrams.

The output of the potentiometer 28 is connected to the changeover switch 51 provided on the upper surface of the controller body 21, and the output of the changeover switch 51 is connected to the zoom drive signal generating circuit 29 and the ultra-low speed zooming dedicated circuit 52. The output of the ultra-low speed zooming dedicated circuit 52 is connected to the zoom drive signal generating circuit 29.

The changeover switch 51 is set to the normal mode (NORM
20, the zoom drive signal generation circuit 29 outputs a drive signal X (t) according to the range of the speed variable knob 30 and the rotation angle of the thumb ring 23 as a normal controller as shown in FIG. . On the other hand, when the changeover switch 51 is set to the low speed zooming dedicated mode (SLOW), the ultra-low speed zooming dedicated circuit 52 as shown in FIG.
Works. As shown in FIG. 19, this circuit operates when the thumb ring 23 becomes a certain angle + θ or −θ or more, that is, when a signal having a certain magnitude or more is input, and has a weak constant with the same sign as the input signal. Is continuously output, and is stopped when the signal from the thumb ring 23 is input again. In other words, thumb ring 2
3 is the zoom direction (+
Or-) functions as a switch for determining and stopping.

With the above configuration, when the selector switch 51 is set to the low speed zooming exclusive mode and the zoom speed is selected by the variable speed knob 30, the thumb ring 23 is tilted by + θ or −θ or more to start zooming, and the thumb ring 23 is again set to ±. Zooming stops when tilted by more than θ.

FIG. 22 is a block diagram of the zoom servo controller according to the eighth embodiment, and FIG. 23 is a plan view seen from the direction C in FIG. The same reference numerals as those in the seventh embodiment are members having the same function, and therefore their explanations are omitted.

The output of the zoom drive signal generating circuit 29 is connected to the zoom lens main body through the connector 31, and is also connected to the LED 54 through the zooming direction display circuit 53.

While the zoom lens main body is being driven at an extremely low speed, the LED 54 is turned on by the zooming direction display circuit 53 to clearly indicate the zooming operation direction, and the LED 54 is turned off while the zoom lens main body is stopped. It is possible to avoid making a mistake in the zooming operation direction.

[0035]

As described above, the zoom servo controller according to the first, second and third aspects of the present invention can perform ultra-low speed zooming without fatigue of the hand and obtain a stable low speed zoom speed. In addition, the thumb ring can be fixed instantly, and it is easy to return to the free state, and the previously selected speed can be accurately reproduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment.

FIG. 2 is a sectional view.

FIG. 3 is an enlarged view of a main part.

FIG. 4 is a configuration diagram of a second embodiment.

FIG. 5 is a sectional view.

FIG. 6 is an enlarged view of a main part.

FIG. 7 is a configuration diagram of a third embodiment.

FIG. 8 is a sectional view.

FIG. 9 is a front view.

FIG. 10 is an enlarged view of a main part.

FIG. 11 is a configuration diagram of a fourth embodiment.

FIG. 12 is a sectional view.

FIG. 13 is a circuit configuration diagram of a fourth embodiment.

FIG. 14 is a circuit configuration diagram of a fourth embodiment.

FIG. 15 is a configuration diagram of a fifth embodiment.

FIG. 16 is a front view of the controller body.

FIG. 17 is a configuration diagram of a seventh embodiment.

FIG. 18 is a plan view seen from the direction A in FIG.

FIG. 19 is a front view seen from the direction B in FIG.

FIG. 20 is a circuit configuration diagram of a seventh embodiment.

FIG. 21 is a circuit configuration diagram of a seventh embodiment.

FIG. 22 is a configuration diagram of an eighth embodiment.

23 is a plan view seen from the direction C in FIG. 22.

FIG. 24 is a configuration diagram of a conventional example.

FIG. 25 is a sectional view.

FIG. 26 is a circuit configuration diagram of a conventional example.

[Explanation of symbols]

 21 Controller Main Body 22 Grip 23 Thumb Ring 24, 33 Axis 25 Bearing 26 Plate Cam 27 Fixing Pin 28 Potentiometer 29 Zoom Drive Signal Generation Circuit 30 Speed Adjustable Knob 31 Connector 32 Seesaw Switch 34 Compression Coil Spring 35a, 35b Hole 36 Ball 37 Rubber

Claims (5)

[Claims] 1. A zoom servo controller comprising means for fixing a tilt of a zoom speed operation ring attached to a grip in a rotational direction. 2. A zoom servo controller provided with a constant speed automatic zooming circuit for transmitting a constant speed drive signal according to a tilt angle of a rotation method of a zoom speed operation ring attached to a grip. 3. The zoom servo controller according to claim 2, further comprising a zoom speed indicator for displaying an output of the constant speed automatic zooming circuit. 4. A zoom servo controller characterized in that an ultra-low speed zooming dedicated circuit for transmitting an ultra-low speed drive signal is provided by a changeover switch attached to the main body. 5. The zoom servo controller according to claim 4, further comprising a zooming direction indicator for displaying an output of the zooming dedicated circuit at the ultra-low speed.