JP2503823B2 - Variable speed zoom switch for camera integrated video tape recorder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zoom switch for driving a variable speed zoom lens in a camera-integrated video tape recorder.

[0002]

2. Description of the Related Art Conventionally, a variable speed zoom lens of a video tape recorder integrated with a camera is often operated at a preset constant speed. This is because if the zoom rotation speed can be set in two steps, high speed and low speed, two zoom buttons are required to operate the zoom operation, which complicates gear shifting operation and increases the number of buttons. This is because it is not preferable.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention has a simple structure of a novel zoom switch capable of switching a zoom lens in two steps of forward and reverse directions and high speed and low speed with one zoom button. The main purpose is to provide.

[0004]

In order to achieve the above object, in a variable speed zoom switch according to the present invention, an insulation attached to a casing (3) so as to swing about a pivot (2) as a fulcrum. Made seesaw type zoom button (1),
A switch operation plate (4) made of a leaf spring, which is arranged below the zoom button (1) and moves together with the zoom button (1), is provided, and the zoom is provided on one end side of the switch operation plate (4). It has first and second switch operation pieces (7) and (8) for operating the first switch (5) that rotates at high speed in the forward direction and the second switch (6) that rotates at low speed, On the other end side of the switch operation plate, a third switch (9) for rotating the zoom at a high speed in the reverse rotation direction and a third and a fourth switch for operating a fourth switch (10) for rotating the zoom at a low speed.
The switch operation pieces (11) and (12) of are provided,
When the zoom button (1) is lightly pushed to either side, the second or fourth switch (6) (10) for low speed rotation operates, and when it is strongly pressed, the first or third switch for high speed rotation. (5) and (9) are configured to operate.

[0005]

In the variable speed zoom switch configured as described above, when the zoom button (1) is lightly pressed to either side, the second or fourth switch (6) (10) for low speed rotation is activated and strongly pressed. When pressed, the first or third switch (5) (9) for high speed rotation operates, and the zoom motor (M) is passed through the motor control circuit and the microcomputer (14) shown in FIG. Is driven, and the zoom lens (15) rotates in the forward or reverse direction at a low speed or a high speed.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 show a typical embodiment of the present invention, which shows a zoom button (1) provided on a casing (3) of a video tape recorder integrated with a camera. The zoom button (1) is formed of an insulating material and is attached to the casing (3) so as to swing in a seesaw shape by a pivot (2).

Further, below the zoom button (1), a switch operating plate (4) made of a leaf spring that moves together with the zoom button (1) is installed. At one end of the switch operating plate (4), a first switch (5) for rotating the zoom at high speed in the forward direction and a first and a second switch (6) for rotating at a low speed are operated. Two switch operation pieces (7) and (8) are provided, and the switch operation plate (4)
On the other end side of the zoom switch, a third switch (9) for rotating the zoom at a high speed in the reverse direction and a fourth switch (1) for rotating at a low speed.
The third and fourth switch operating pieces (11) and (12) for operating 0) are provided. The second and fourth switch operating pieces (8) and (12) for operating the low speed rotation switches (6) and (10) are high speed rotation switches (5).
First and third switch operating pieces (7) for operating (9)
It is formed so as to come into contact with a switch which is lower than (11) and which faces the high-speed switch operating piece before the switch. Thus, when the zoom button (1) is lightly pushed to either side, the second or fourth switch (6) (10) for low speed rotation operates, and when it is strongly pressed, the first or second switch for high speed rotation is activated.
Alternatively, the third switch (5) (9) is configured to operate. The above-mentioned switches (5) (6) (9) (1
0) is assembled on the PC board (13) mounted inside the casing. In FIG. 1, (15) is a zoom lens, (17) is a viewfinder, and (1)
8) indicates a microphone.

FIG. 6 shows another embodiment of the present invention. In this embodiment, the switch operating plate (4) made of the leaf spring is formed of a conductor, and the switch is provided on the PC board (13) as the switch. Conductive pattern on (5) (6) (9) (10)
Are formed. Further, the switch operating plate (4) is provided with a grounding piece (16).

In the embodiment shown in FIG. 7, the conductive pattern is used as a switch as in the embodiment shown in FIG. 6, but the earth piece (16 ') is integrated with the switch operating plate (4). Has been formed.

Although a representative embodiment of the present invention has been described above, the present invention is not necessarily limited to only the structure of the above-mentioned embodiment, and is appropriately provided that the constituent features of the present invention are provided and the effect is obtained. Of course, it can be changed and implemented.

[0012]

Since the present invention is constructed as described above, when the zoom button (1) is lightly pushed to either side, the zoom lens rotates in the forward or reverse direction at a low speed, and becomes stronger. Since it rotates at a high speed when pressed, zooming operation can be performed smoothly, and in particular, one zoom button can switch the zoom lens between the forward and reverse directions and the high speed and low speed stages. It is easy to operate, and the number of buttons is small, so that the design of the video main body can be simply formed, and the number of parts can be reduced to simplify the structure.

[Brief description of drawings]

FIG. 1 is a side view of a camera-integrated video tape recorder incorporating a variable speed zoom switch according to the present invention.

FIG. 2 is a cross-sectional view showing a main part of a shift zoom switch according to the present invention.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a plan view of only a switch operation plate according to the present invention.

FIG. 5 is a simple electric circuit diagram of the variable speed zoom switch according to the present invention.

FIG. 6 is a sectional view similar to FIG. 2, showing another embodiment of the present invention.

FIG. 7 is a sectional view similar to FIG. 2, showing still another embodiment of the present invention.

[Explanation of symbols]

 (1) Zoom button (2) Axis (3) Casing (4) Switch operation plate (5) First switch (6) Second switch (7) First switch operation piece (8) Second switch operation Plate (9) Third switch (10) Fourth switch (11) Third switch operation plate (12) Fourth switch operation plate (13) PC board

Claims (1)

(57) [Claims] 1. An insulating seesaw-type zoom button mounted on a casing so as to swing about a pivot.
A switch operating plate made of a leaf spring arranged below the zoom button and moving together with the zoom button, and a first switch for rotating the zoom at high speed in the forward rotation direction at one end side of the switch operating plate. And a first and a second switch operating piece for operating a second switch that rotates at a low speed, and a third switch that rotates the zoom at a high speed in the reverse direction at the other end of the switch operating plate. Third and fourth switch operating pieces for operating the fourth switch that rotates at a low speed are provided. When the zoom button is lightly pressed to either side, the second or fourth switch for rotating at a low speed is provided. A shift zoom switch in a camera-integrated video tape recorder, characterized in that the switch operates and when pressed hard, the first or third switch for high-speed rotation operates.