JPH0779433B2 - Video camera operation mechanism - Google Patents

Description

The present invention relates to an operation mechanism of a video camera, and particularly to a moving range of a zoom lens (a range in which a focal length can be changed) during recording.
The present invention relates to an operation mechanism of a video camera which is regulated.

[Conventional technology]

In the case of a conventional video camera such as a so-called integrated VTR in which a video camera and a VTR are integrated with each other, as shown in FIG. 4, the video camera body 2 adjacent to the zoom lens 1 is used at the time of reproduction. Since various operation buttons 4 are provided, and these operation buttons for reproduction are not required at the time of recording, erroneous operation is performed by rotating the lid 5 pivotally supported by the pin 6 in the direction of arrow A to close it. There is an advantage in that it is easy to handle, especially for beginners.

On the other hand, with the development of optical technology, the zoom ratio has recently been increased to 6-
A video camera having an 8 × zoom lens has been downsized. For this reason, when a beginner sets a zoom lens on the telephoto side without using a tripod, the camera tends to cause camera shake, and there is a problem in that an unreadable image with a large screen shake is often recorded.

On the other hand, in the 8-millimeter cine camera, by operating the button provided on the zoom section of the zoom lens, the range of movement of the zoom lens from the wide-angle side to the telephoto side is conventionally fixed (this range is called the family zone). Some of them are mechanically configured so that they are not allowed to move in other ranges. An example thereof will be described with reference to FIGS. 5 and 6. FIG. 5 shows the structure of a stopper member attached to the zoom portion. The stopper member 10 is provided with a substantially U-shaped notch 12 and a step 13
And a knob 15 fitted to the tubular body 14 having an implanting pin 16 that engages with the notch 12 of the tubular body 14.

A flange portion 19 is formed at one end of the knob 15, and a protrusion 18 is fixedly provided at the center of the outer surface of the flange portion 19. A spring 20 is provided between the collar portion 19 and the inner peripheral surface of the stepped portion of the cylindrical body 14, and the knob 15
Is always biased to the right in the figure. The stopper member 10 having such a configuration is provided on the lens barrel 36 of the zoom lens as shown in FIG. Nose of stopper member
The head 17 of 15 is pulled to the left in FIG. 5 against the urging force of the spring 20, and when it is rotated clockwise, the urging force of the spring 20 engages with the notch 12 of the cylindrical body 14. The setting pin 16 moves from the position shown by the solid line to the position shown by the dotted line, and the protrusion 18 projects and enters the notch 38 that restricts the movement range of the zoom lens provided on the zoom ring 34. As a result, the zoom lens is restricted so that it can be moved only within a certain range, for example, within a range in which the magnification from the wide-angle side to the telephoto side does not increase so much.

[Problems to be solved by the invention]

Although the above-described setting of the zoom lens in the family zone is intended for beginners, it requires a plurality of operations, and there is a problem that the operability is not good.

Further, a lid that shields the reproduction operation button during recording is necessary to prevent a beginner's erroneous operation.

The present invention has been made in view of such circumstances,
An object of the present invention is to provide a video camera operation mechanism capable of restricting a moving range of a zoom lens to a certain range which does not have a high magnification by a single operation of a lid body which shields a reproducing operation button during recording. .

[Means for solving problems]

In order to achieve the above object, the present invention provides a lid body that is provided in a camera body adjacent to a zoom lens and that shields a playback operation button during recording and that can be opened and closed, and a focal length of the zoom lens. When the lid is closed, the stopper fixed on the zoom ring is inserted so as to cross the rotation passage of the stopper of the zoom ring, and the rotation of the zoom ring toward the high magnification side is crossed. A rotation range regulating member for regulating, and a mechanism section for moving the rotation range regulating member forward and backward with respect to a rotation passage of a stopper of the zoom ring in association with an opening / closing operation of the lid body. It is what

[Action]

In the operation mechanism of the video camera according to the present invention, the rotation range that restricts the rotation range of the zoom ring when the lid body that is openably and closably provided on the camera body that shields the playback operation button is closed during recording. The restricting member enters the zoom ring so as to cross the rotation path. As a result, when the zoom ring is rotated, the rotation of the zoom ring is prohibited in the rotation range in which the zoom lens has a high magnification due to the contact between the stopper provided on the zoom ring and the rotation range restricting member.

Therefore, according to the present invention, the movement range of the zoom lens can be restricted to a certain range that does not have a high magnification by a single operation (closing operation) of the lid for shielding the reproduction operation button during recording.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. First
The figure shows the configuration of the main part of a video camera to which the present invention is applied. In the figure, various reproduction operation buttons are provided on the upper portion 3 of the camera body 2 adjacent to the zoom lens 1. Reference numeral 22 denotes a switch operating member for operating the power switch 40.
22a is provided, and the operation piece 41 of the power switch 40 and the hole 22a are in an engaged state. A protrusion 22b is provided at the center of the upper surface of the switch operating member 22, and a bent piece 22c is provided at one end thereof. .

Further, a lid 5 provided on the upper portion 3 of the camera body 2 for shielding various reproduction operation buttons is attached to the camera body 2 by a pin 6 so as to be openable and closable, and a switch actuating member 22 is driven at the lower end thereof. A driving piece 42 and a pressing piece 44 for pressing the lever 50 are fixedly provided.

The lid 5 is a spring support portion provided on the fixed wall of the camera body 2.
A click spring 46 supported by 48 maintains the open state or the closed state, and the open state is shown in FIG.

On the other hand, the lever 50 is pivotally supported by a pin 56, one end thereof is pivotally attached to the slide member 60, and the other end thereof is rotationally biased counterclockwise by a spring 52. Reference numeral 54 is a stopper that restricts the counterclockwise rotation of the lever 50.

The slide member 60 is provided with elongated holes 62 and 64, and the guide pins 66 and 68 implanted in the camera body 2 are inserted into the elongated holes 62 and 64. ,
It is supported by 68 so as to be slidable in the left-right direction in the figure.

Further, a projection piece 60a is provided at the lower end of the slide member 60, and the projection piece 60a is urged by a spring 68 to the left in the figure. The spring constant of the spring 68 is selected to be smaller than that of the spring 52. At the upper end of the slide member 60, there is a rotation range restricting piece 60b for restricting the rotation range of the zoom ring 34, which is retracted so as to cross the rotation path of the zoom ring 34 for changing the focal length of the zoom lens 1. Has been formed.

Reference numeral 70 is a stopper that regulates the range of movement of the slide member when moving to the left in the figure.

The zoom ring 34 is provided with a stopper 72, and the stopper 72 comes into contact with the restriction piece 60b when the rotation range restriction piece 60b formed on the slide member 60 enters the rotation path of the zoom ring 34. By the contact, the zoom ring 34 is restricted so that the zoom lens can rotate only within a certain range as the zoom lens has a high magnification.

In the above structure, when the photographer rotates the lid 5 counterclockwise as shown by arrow A in FIG. 2, the driving piece 42 and the pressing piece 44 fixed to the lower end of the lid 5 are also turned. It can be rotated clockwise. As a result, the bending piece 22C of the switch operating member 22 is pressed by the driving piece 42, the switch operating member 22 is moved to the right in the figure, and the power switch 40 is switched from the off state to the recording preparation state.

Almost at the same time, the lever 50 is rotated clockwise about the pin 56 by the counterclockwise rotation of the pressing piece 44 against the biasing force of the spring 52, and the slide member 60 is moved leftward in the drawing. Move to.

As a result, the rotation range restricting piece 60b formed on the upper end of the slide member 60 enters the rotation path of the zoom ring 34 in a direction intersecting with the rotation path. In this state, when the photographer rotates the zoom ring 34 to focus on the copy, even if the zoom ring 34 is rotated beyond the fixed range in which the zoom ring 1 does not have a high magnification. The contact of the rotation range restricting piece 60b of the slide member 60 with the stopper 72 provided on the zoom ring 34 restricts the rotation of the zoom ring 34 in the direction of high magnification. FIG. 3 shows a state in which the rotation restricting piece 60b has entered the rotation passage of the zoom ring 34.

〔The invention's effect〕

As described above, according to the present invention, when the openable and closable lid provided on the camera body adjacent to the zoom lens and blocking the reproduction operation button during recording is closed at a predetermined position, Moving the zoom lens by inserting a restricting member that restricts the range of rotation of the zoom ring in a manner interlocking with the closing operation so as to cross the rotation path of the zoom ring and contacting the stopper provided on the zoom ring. According to the present invention, the range of movement of the zoom lens is increased by a single operation of the lid that shields the reproduction operation button that is unnecessary during recording because the range is configured to be allowed only within a certain range that does not result in high magnification. It is possible to regulate within a certain range that does not result in a magnification.

Therefore, according to the present invention, it is possible to prevent an erroneous operation by a beginner and a screen shake due to a hand shake during recording.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a configuration of a main part of a video camera to which the present invention is applied, and FIG. 2 is the present invention when a lid for shielding a reproduction operation button is in an open state. FIG. 3 is a front view of a video camera to which the present invention is applied, FIG. 3 is a perspective view showing the appearance of the video camera to which the present invention is applied when the lid is closed, and FIG. 4 is a conventional view in which the lid is open. FIG. 5 is a perspective view showing the appearance of the video camera of FIG. 5, FIG. 5 is a sectional view showing the structure of a stopper member for restricting the moving range of a zoom lens applied to a conventional cine camera, and FIG. 6 is shown in FIG. It is explanatory drawing which shows the state which the stopper member was attached to the zoom lens. 1 ... Zoom lens, 2 ... Camera body, 5 ... Lid,
22 …… Switch actuating member, 46 …… Click spring, 50 ……
Lever, 52, 68 ... Spring, 60 ... Sliding member, 60b ...
… Rotation range control piece, 72 …… Stopper.

Claims (1)

[Claims] 1. A lid body which is provided on the camera body adjacent to the zoom lens and shields a reproduction operation button at the time of recording so as to be openable and closable, and a zoom ring for changing a focal length of the zoom lens. And a stopper fixed to the zoom ring, and when the lid is closed, the stopper enters into the zoom ring so as to intersect the rotation path of the stopper, and restricts the rotation range of the zoom ring to the high magnification side. An operation of the video camera, comprising: a member; and a mechanism section that moves the rotation range restricting member forward and backward with respect to the rotation passage of the stopper of the zoom ring in conjunction with the opening and closing operation of the lid body. mechanism.