JP3298963B2 - Operating device for zoom lens for TV camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device for servo-driving zooming and focusing of a zoom lens in a television camera.

[0002]

2. Description of the Related Art Operation methods of a zoom lens in a television camera are classified into a manual method and an electric method. In the manual method, rotation of a dedicated zoom controller and a handle of a focus controller are transmitted to a lens body via a flexible cable. There are a cable system that transmits mechanically, and a single-axis two-operation system that performs a zooming operation in conjunction with a push / pull operation of one operation rod and mechanically performs a focusing operation in conjunction with a rotation operation.

[0003] As an electric system, a servo system using a dedicated zoom servo controller and a focus servo controller is known.

[0004] In Japan, a one-axis two-operation system is traditionally used, and a servo system is gradually adopted. However, the familiarity with the one-axis two-operation system is strong,
Since it is difficult to purchase two types of expensive servo lens and one-axis two-operation lens, both electric and manual drive mechanisms are provided in the lens. The operation is performed by one-axis two-operation and the switching mechanism is electric / manual. There has been proposed a lens that allows the user to select a lens.

[0005]

However, in the above-mentioned prior art, since both the electric / manual driving and the switching mechanism are provided inside the lens, the mechanism becomes complicated, the weight increases, and the mobility is poor. There were drawbacks.

In a single-axis two-operation lens, as shown in FIGS. 6A and 6B, an operating rod 34 penetrates the inside of the television camera main body 32 from the rear surface thereof, and The cameraman 30 is connected to the drive mechanism 31a, and looks at the viewfinder 32a attached to the camera main body 32, and moves the television camera including the camera main body 32 attached to the tripod 33 and the lens 31 to the tripod rod 33a. The object to be photographed is determined by swinging up and down (tilt) and left and right (pan), and the angle of view is determined by operating the operation rod 34.

However, as shown in FIGS. 6A and 6B, there is no problem when the television camera is operated horizontally and in front, but as shown in FIGS. 7A and 7B, Photographer 30 in the state of tilting downward and upward
Must operate the operating rod 34 in an unreasonable position,
It is difficult to perform subtle operations during long-time shooting.

[0008] As shown in (3) in FIG. 7, tower 3
When panning in limited places such as 5
There were drawbacks, such as imposing an unreasonable posture by the man .

An object of the present invention is to solve the above-mentioned conventional problems and to provide a zoom lens operating device for a television camera which can servo-control the zoom lens by two operations of one axis and which can be operated safely and easily by a cameraman. Aim.

[0010]

A first configuration for realizing the object of the present invention is to operate a zoom lens for a television camera that performs zooming by pushing and pulling an operation member and performs focusing by rotating the operation member. In the apparatus, the zoom lens and the television camera are separately disposed, and first detection means for detecting a push / pull operation position of the operation member, and second detection means for detecting a rotation operation position of the operation member , means for transmitting, based on the first detection means and the second detecting means and the operation detects the position, the command signal for the servo control both zooming and focusing of the zoom lens in the zoom lens It has a door, Oyo panning the TV camera
It is fixed to legs that support tilting and tilting . A second configuration for achieving the object of the present invention is the first configuration, wherein a command signal for servo-controlling both zooming and focusing of the zoom lens is transmitted to the zoom lens via a cable. It is characterized by. A third configuration for realizing the object of the present invention is characterized in that, in the first and second configurations, an operation force adjusting unit for adjusting a push-pull operation force of the operation member is provided. The fourth configuration for realizing the object of the present invention is the first configuration described above.
To a third configuration, further comprising an operation force adjusting unit for adjusting a rotation operation force of the operation member. The fifth configuration for realizing the object of the present invention includes the first to fourth configurations.
And a switching unit for switching an extender of the zoom lens, and transmitting a signal from the switching unit to the zoom lens.

[0011]

1 to 4 show a first embodiment of the present invention. FIG. 1 is a side sectional view thereof, FIG. 2, FIG. 3, FIG.
Are respectively AA sectional view, BB sectional view, CC
It is sectional drawing.

In the present embodiment, zooming is performed by pushing (Tele) or pulling (Wide) the grip 2a of the operation rod 2, and focusing is performed by rotating clockwise (infinitely) and counterclockwise (closest), and the focus position is set. Is detected by a potentiometer 8 and the zoom position is detected by a linear potentiometer 9, and a command signal from a drive circuit 10 is transmitted to a lens body via a connector 11 with a cable to perform servo drive.

The mechanism is, as shown in FIG.
The outer diameter of the sliding shaft 2b at the end of the shaft engages with the inner diameter of the rotating cylinder 5 whose both ends are supported by the rotating members 6a and 6b fixed to the main body 1, and is further provided perpendicular to the sliding shaft 2b. Axis 2
c denotes a rotating member 3b engaged with a linear groove 5a provided in the rotating cylinder 5 in parallel with the sliding shaft 2b, and a cylindrical groove provided in the sliding body 4 having an inner diameter engaged with an outer diameter of the rotating cylinder 5. A rotating member 3a that engages with 4a is attached.

The sliding body 4 is engaged with the fixed shaft 7 by a hole 4b to prevent rotation. In the above configuration,
The linear movement (push / pull) of the operating rod 2 is transmitted to the sliding body 4 via the rotating member 3a, and the linear potentiometer 9 connected by the shaft 9a detects the position.

On the other hand, the rotational movement of the operating rod 2 is controlled by the rotating member 3b.
Is transmitted to the rotary cylinder 5 via the shaft 8a, and the potentiometer 8 coupled with the shaft 8a detects the position.

Further, in the single-axis two-operation lens, the force (load) required to mechanically drive the focus unit and the zoom unit in the lens is the operating force of the operation rod.
A mechanism that generates the same operating force in the present embodiment and allows the force to be adjusted appropriately will be described below.

The focus operating force is adjusted by providing a friction ring 12 on the end face 5b of the rotary cylinder 5. As shown in FIG. 3, the inner diameter of the friction ring 12 is engaged with the outer diameter of the bearing 1a that supports the rotary cylinder 5, and is also engaged with the pin 1b that is vertically fixed to the bearing 1a. Is provided, the rotation of which is regulated, and the bearing 1a linearly moves along the outer diameter of the bearing 1a. The compression coil spring 14 serves to press the friction ring 12 against the rotating cylinder end face 5b by the knob 13 engaged with the bearing 1a with a screw.

In the above configuration, as shown in FIG. 3, by rotating the knob 13 protruding to the outside through the notch hole 1d provided in the side surface of the main body 1, the interval between the knob 13 and the friction ring 12 changes, and the compression coil spring The desired operating force can be obtained by changing the contact pressure between the friction ring 12 and the rotary cylinder 5 by changing the spring pressure of 14.

On the other hand, for adjusting the zoom operating force, a clamp 15 is provided on a part of the outer periphery of the operating rod 2. As shown in FIG. 4, the clamp 15 is a U-shaped elastic member, and its bent portion has a curvature that engages with the outer diameter of the operation rod 2.
Elastic fibers such as felt 15a are attached to the surface.

The clamp 15 is provided with a groove 1 provided in the main body 1.
e, one foot 15b is fixed to the main body 1, and the other foot 15c has a shaft 16a passing through the feet 15b, 15c and being connected to the main body 1 with a screw, and having the other end. The opening angle of the foot is changed in accordance with the movement of the axis of the knob 16 protruding to the outside through the hole 1c provided on the side surface of the main body 1, and the force for tightening the operation rod 2 is changed.

In FIG. 1, reference numeral 17 denotes a switch for electrically switching an extender of the lens body, and reference numeral 18 denotes a switch for returning an image to a camera. Sent to.

In FIG. 3, numeral 19 denotes a chrysanthemum seat for fixing the main body, and a mounting angle can be selected by using a chrysanthemum seat (not shown) which is a pair (male / female). ing. The operating device configured as described above is adapted to be mounted on a dedicated mounting rod 33b provided on a tripod 33 supporting a television camera, as shown in FIG. 8, separately from the camera body. The mounting rod 33b is fixed to the tripod 33 in a non-rotatable manner, for example, and is mounted in a direction facing the cameraman 30.

Therefore, as in the case of the horizontal photographing shown in FIG. 8A and the front photographing shown in FIG.
(3), downward tilting imaging shown in (4) of FIG. 8, and panning imaging shown in (5) of FIG. 8 can be performed. There is no more unreasonable posture or dangerous shooting than in the case.

FIG. 5 is a diagram showing a second embodiment of the present invention, in which a movable finger pad 20 is added to the first embodiment. In this method, after focusing, an auxiliary member for performing zooming with only the finger is formed, the finger rest is sandwiched between the index finger and the middle finger, and the grip 2a is operated with the thumb, ring finger, etc. Performs more delicate zooming control, and in this embodiment,
The distance between the fingertip and the grip can be changed according to the photographer's preference.

The finger pad 20 slides while its inner diameter is engaged with the outer diameter of the shaft 1f protruding toward the grip 2a of the main body 1, and the knob 21 is connected to the finger pad 20 with a screw. The tip portion also engages with a long groove 1g provided on the shaft 1f to regulate the rotation of the finger pad 20, and serves to fix the position after setting the distance between the grip 2a and the finger pad 20.

[0026]

As described above, the following effects are obtained by using the operation device for a zoom lens for a television camera according to the present invention.

1. The servo drive can be performed by one axis and two operations without any change to the existing servo lens.

2. Pan the operation device body and the TV camera
Television on legs supporting tilting and tilting
Regardless of camera panning and tilting
Since the camera can be fixed in a fixed posture, the photographer can shoot at any angle of the camera without changing its posture ( reasonable posture or favorite posture).

3. The operating force can be arbitrarily set by the operating force adjusting means.

[0030]

[0031]

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along the line CC of FIG. 1;

FIG. 5 is a sectional view showing a second embodiment.

FIG. 6 is a diagram showing a conventional example.

FIG. 7 is a diagram showing a conventional example.

FIG. 8 is a diagram showing a use state of the first embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body 1a ... Bearing 1b ... Pin 1c, 1d ... Hole 1e ... Groove 1f ... Shaft 1g ... Long groove 2 ... Operating rod 2a ... Grip 2b ... Sliding shaft 2c ... Shaft 3a, 3b ... Rotating member 4 ... Sliding body 4a ... Cylindrical groove 4b Hole 5 Rotating cylinder 5a Linear groove 5b End face 6a, 6b Rotating member 7 Fixed shaft 8 Potentiometer 8a Axis 9 Linear potentiometer 9a Axis 10 Drive circuit 11 Connector with cable 12 Friction ring 12a Groove 13 Knob 14 Compression coil spring 15 Clamp 15a Felt 15b, 15c Foot 16 Knob 16a Shaft 17 Extender changeover switch 18 Camera feed back switch 19 Kikuza 20 Finger rest 21 Knob 30 ... Photographer 31 ... Zoom lens 31a ... Drive mechanism 32 ... TV camera 32a ... View Finder 33 ... tripod 33a ... tripod rod (operation) 33b ... tripod rod (fixed) 34 ... operating rod 35 ... tower block

Continuation of the front page (56) References JP-A-53-48728 (JP, A) JP-A-4-306078 (JP, A) JP-A-58-207011 (JP, A) JP-A-58-172605 (JP) JP-A-2-2855311 (JP, A) JP-A-2-136809 (JP, A) JP-A-52-13090 (JP, A) JP-A-60-253379 (JP, A) JP-A-54-21617 (JP, A) JP-A-4-216517 (JP, A) JP-A-59-170806 (JP, U) JP-A-60-68509 (JP, A) U) Japanese Utility Model Showa 60-130416 (JP, U) Japanese Utility Model Showa 57-79805 (JP, U)

Claims (5)

(57) [Claims] 1. An operating device for a zoom lens for a television camera, wherein zooming is performed by pushing and pulling an operating member, and focusing is performed by rotating the operating member, wherein the zoom lens and the television camera are separately disposed; first detecting means for detecting a push-pull operation position of the operation member, a second detecting means for detecting the rotational operation position of the operation member, and said first detecting means and said second detecting means Means for transmitting, to the zoom lens, a command signal for servo-controlling both zooming and focusing of the zoom lens based on the detected operation position, so that the television camera can be panned and tilted.
An operating device for a zoom lens for a television camera, the operating device being fixed to a leg that supports the zoom lens. 2. A zoom lens for a television camera according to claim 1, wherein a command signal for servo-controlling both zooming and focusing of said zoom lens is transmitted to said zoom lens via a cable. Operating device. 3. The operating device of a zoom lens for a television camera according to claim 1, further comprising an operating force adjusting unit for adjusting a pushing / pulling operating force of the operating member. 4. An apparatus according to claim 1, further comprising an operation force adjusting means for adjusting a rotation operation force of said operation member.
4. The operation device for a zoom lens for a television camera according to any one of items 1 to 3. 5. The television according to claim 1, further comprising a switching unit for switching an extender of the zoom lens, and transmitting a signal from the switching unit to the zoom lens. Camera zoom lens operation device.