JPS63135930A - Microcamera - Google Patents

Abstract

PURPOSE:To obtain a miniaturized microcamera capable of performing a various kinds of switching by a momentary electrical command, by providing a function part which changes a state in different states, and a switching mechanism which switches the state of the function part, and constituting the switching mechanism with a self-supporting solenoid. CONSTITUTION:By energizing the self-supporting solenoid 4, and moving a crosswise moving plunger leftward, a half size mask plate 3 is saved outside the optical path of a photographing lens 1, and a full size of picture is photographed. By performing the energizing of the self-supporting solenoid in such case just momentarily, the switching can be performed rapidly, and the crosswise moving plunger 7 can hold the position even when conduction ceases. On the other hand, by moving the crosswise moving plunger 7 rightward by energizing the self-supporting solenoid 4 again, the half size mask plate 3 shields the half of the screen of a full size aperture plate 2 via a connecting lever 5, then, a half size of photographing picture is prepared. Even in such case, the crosswise moving plunger 7 keeps the position after completing the conduction to the self-supporting solenoid 4. In such way, it is possible to miniaturize the microcamera.

Description

[Detailed Description of the Invention] Retired Emperor Doguri ■ Principality of Shiri The present invention is directed to a micro camera, especially for changing the screen size of the image.
This invention relates to a switching mechanism for various functions of a micro camera, such as focusing distance switching, reduction ratio switching, and blip mark position switching.

'r Bisonoguchi The micro camera requires various changes depending on the document, such as switching the image screen size (from full size to half size), switching the focusing distance, switching the reduction ratio, and switching the position of the blip mark. Recently, with the wave of systemization, there has been a trend to perform such switching using electrical commands. However, when switching is performed using a built-in motor and its forward and reverse rotation,
A motor and a transmission mechanism are required, which inevitably makes the switching mechanism larger and more complicated.As a result, the switching operation becomes slow and it becomes difficult to time the switching. On the other hand, by using a solenoid instead of a motor,
A method has also been proposed in which the switching operation is performed by turning the power on and off. In this case, the switching mechanism is relatively small and can perform instantaneous switching, but there is a problem in that it requires constant energization.

The present invention was made in view of the above-mentioned problems, and it is an object of the present invention to provide a small micro camera that can perform various switching operations with an instantaneous electrical command and maintain the same state even after power is cut off. It is an object.

In order to achieve the above object of "width", the present invention has a functional part that changes the state to a different state, and a switching mechanism that switches the state of the functional part, and the switching mechanism is a self-holding type. It is characterized by being composed of a solenoid.

The operation of the micro camera according to the present invention will be explained in detail in the Examples section below.

FIG. 1 shows a first embodiment of the present invention, in which a self-holding solenoid is used as the photographing screen size switching mechanism (full size←-half size).

In the figure, reference numeral 1 denotes a photographing lens provided at the lower central part of the body (not shown), and at a position opposite to the photographing lens 1, there is a projection window (not shown) for data photographing and a photographing window 2a.
A full-size aperture plate 2 with a . 3 is a half-size mask plate that covers or uncovers half of the photographing window 2a of the full-size aperture plate 2; By operating the self-holding solenoid 4, the maximum shadow size can be switched between half size and full size. 6 is a photographic film.

When the self-holding solenoid 4 is energized and the left-right moving plunger 7 is moved to the left, the half-size mask plate 3 is retracted out of the optical path of the photographing lens 1, and a full-size screen is photographed. In this case, the self-holding solenoid 4 can be energized instantaneously to switch quickly, and thereafter, even if the energization is cut off, the left-right movable plunger 7 maintains its position.

On the other hand, when the self-holding solenoid 4 is momentarily energized again and the left-right moving plunger 7 is moved to the right, the half-size mask plate 3 blocks half of the screen of the full-size aperture plate 2 via the connecting lever 5. , the shooting screen will be half size. In this case as well, even after the self-holding solenoid 4 is energized, the left-right movable plunger 7 maintains its position.

FIG. 2 shows a second embodiment of the present invention in which a self-holding solenoid is also used in the photographic magnification switching mechanism. In the figure,
12 is a focusing helicoid, and 11 is a photographing lens attached to the focusing helicoid. A self-holding solenoid 13 is provided on the left side of the photographing lens 11, and the self-holding solenoid 13 is connected to the focusing helicoid 1.
2 via a connecting lever 14 and a left-right moving plunger 15.

By energizing the solenoid 13, the solenoid 13
drives and controls the left-right movable plunger 15, and the focusing helicoid 12 rotates by an angle θ according to the movement of the left-right movable plunger 15. As a result, the lens moves in the optical axis direction, and each focus position is adjusted. secure.

In this case, the self-holding solenoid 13 only needs to be energized during the switching operation, and thereafter, even if the energization is cut off, the in-focus position can be secured and the photographing magnification can be quickly changed.

In the above embodiments, the case of switching the screen size and switching the magnification was explained, but the present invention is not limited to the above cases, but can be used for various switching mechanisms of a micro camera mechanism, such as changing the position of a blip mark.

Further, in the above embodiment, the switching mechanism for changing the state from the first state to the second state has been described, but this may also use a three-stable self-holding solenoid that latches even in the center position. When using a solenoid,
It can be used for 3-state switching.

As explained above, according to the present invention, an instantaneous energization causes the solenoid plunger to go into a bushing state, and another instantaneous energization brings it into a pulled state, and in either case, in the normal state when the energization is cut off, the solenoid plunger remains in that state. Since we used a self-holding solenoid that can maintain constant current in the various switching mechanisms of the micro camera, it has the effect of allowing rapid switching that cannot be achieved with conventional solenoids or motors. Since it is not energized at all times, various types of switching can be performed using a self-holding solenoid that is extremely small considering its output, which also has the effect of making the micro camera smaller.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating switching of the shooting screen size in the micro camera according to the first embodiment of the present invention, and FIG. 2 is a diagram illustrating switching the focusing distance in the micro camera according to the second embodiment of the present invention. be.

Claims (1)

[Claims] 1. A micro camera comprising a functional section that changes the state to a different state, and a switching mechanism that switches the state of the functional section, the switching mechanism comprising a self-holding solenoid.