JPH04309935A - Camera - Google Patents

Abstract

PURPOSE:To provide a camera which can take a photograph in a panoramic size and which can change the size of a picture without making the camera large or increasing the weight of the camera as to the camera capable of taking the photograph of panoramic picture(that is, a picture long sideways) which is on the market, which necessitates a mechanism for moving a movable mask in the case of making the picture in the panoramic size in the camera, so that it is unavoidable in the conventional manner that the camera is made large and the weight of the camera is increased. CONSTITUTION:This camera is provided with light emitting bodies 6 and 7 which expose a film 2 in a belt state along the upper edge and the lower edge of one frame of the film 2 in an aperture part. Since the movable mask mechanism is not necessitated in the camera, the camera is prevented from being made large and the weight thereof is prevented from being increased.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly to a variable screen size camera capable of changing the screen size.

0002

2. Description of the Related Art Conventionally, there are cameras on the market that allow the screen size to be selected between a normal full size and a reduced panoramic size. In this camera, when photographing a panoramic screen, the panoramic screen is constructed by shielding the upper and lower edges of the film with light shielding members.

0003

[Problems to be Solved by the Invention] In the conventional camera,
Switching between full size and panoramic size requires a complicated mechanism for moving the light shielding member, which has the drawback of increasing the weight and size of the camera. Furthermore, an actuator is required to move the light shielding member, resulting in increased cost and weight.

An object of the present invention is to provide a variable screen size camera that does not increase the size or weight of the camera.

[0005]

[Means for Solving the Problems] In the present invention, the outer edge of the film is exposed by a light emitting means without using a mechanical mechanism such as a movable mask to reduce the screen size, which increases the weight and size of the camera. It is characterized by realizing an unprecedented variable screen size camera.

[0006]

[Operation] In the camera of the present invention, when photographing on a reduced size screen (panoramic size screen), the light emitters 6 and 7 are emitted as shown in FIG. The screen is reduced by forming an exposed area (the area filled in black in FIG. 5) along the lower edge.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. FIG. 1(a) is a diagram showing an embodiment of the camera of the present invention, and is a sectional view of the camera viewed from the side.

1 is a photographing lens, 2 is a film, 3 is a shutter, 4 is a light-shielding tube that shields the outside of the film, 6 and 7
is a light emitter using an LED or a lamp, which is a means for exposing the upper and lower sides of the film to a predetermined amount of light.

FIG. 2 is a diagram showing the configuration of the control system of the camera of this embodiment, where 20 is a microcomputer that controls the camera, and 21 is an AF (autofocus) that measures distance and focuses the lens.
The device is an AE (automatic exposure) device including a shutter to properly expose the light of the subject onto the film, 23
is a film feeding device that winds and rewinds the film. 25 are switches SW1 and SW2 that close in response to the first stroke of a shutter release button (not shown);
6 is a switch SW2 that similarly closes in response to the second stroke of the shutter release button, and 27 is a panoramic switch that closes depending on whether the photographer has selected panoramic size or full size. Reference numeral 24 denotes a screen reduction exposure means for reducing the screen by exposing the peripheral edge of the film in a band-like manner.

FIG. 4 shows the operation sequence of the microcomputer 20 when photographing one frame. In #101, a switch (SW1) is activated in conjunction with the pressing operation of the release button (not shown).
25 is turned on (#102), the microcomputer 20 is activated (#103), and the AF device 21 is activated to focus the lens 1. (#104) Next, when the release button (not shown) is further pressed, the switch (SW2) 26 is turned ON (
#105), the AE device 22 operates, the shutter 3 opens and closes, and the subject image is exposed on the film 2. (#106)
The state of the panorama switch 27, which determines whether to shoot in panoramic size or full size, is detected, and in the case of panoramic size, (#107) operates the screen reduction exposure means 24 that exposes the upper and lower edges of the film. The light emitters 6 and 7 are caused to emit light. If the panorama switch 27 is full size, do nothing and proceed to the next step. After that (#108), the film is wound. In the case of panoramic size, the film may be rolled up while exposing the upper and lower edges of the film. (#109) When winding is completed, the power to the light emitters 6 and 7 is stopped and the light is turned off. When photographing in panoramic size in this manner, the film is exposed as shown in FIG. 5(b). In addition, light emission 6 and 7 expose the upper and lower sides of the film.
When the light-emitting portion of the film is expanded outward, the upper and lower sides of the film are exposed as shown in FIG. 5(a). The light emitting body may be any type of light emitting device, such as an LED, a small lamp, or an electroluminescence (EL) device, as long as it emits light when energized.

FIG. 3(a) shows an example of the current supply circuit for the LED.
The emitter of the NP transistor 30 is connected to the positive electrode of the power supply, and the base is connected to the microcomputer 20. When the base terminal is brought to the "L" level by the microcomputer, the transistor 30 is turned on and current is applied to the LED 32 through the limiting resistor 31. When the base terminal is at the "H" level, the transistor 30 is turned off and the current flow is stopped. In the case of FIG. 3(b), a small lamp 34 is used as a light emitting body, and the operation and electrical configuration of each part of the camera are the same as in FIG. 3(a), so a description thereof will be omitted. Note that the direction in which the upper and lower sides of the film are exposed may be from the front or back of the film. In the embodiment described above, two light emitters were used to expose the upper and lower sides of the film, but in the second embodiment shown in FIG. 6, the number of light emitters was reduced to one by using a fixed mask 10. be. Figure 6(a) is a cross-sectional view of the camera seen from the side.
(b) is a diagram of the fixed mask 10 seen from behind the optical axis. The mask 10 has holes 1 through which the image of the subject is exposed on the film.
1, and holes 12 and 13 for partially exposing the upper and lower sides of the film. When the light emitter 8 lights up, the light leaking through the holes 12 and 13 of the mask 10 exposes the upper and lower sides of the film. The camera operation at this time is Example 1
Since it is the same as , the explanation is omitted here. Next, Example 3 of the present invention will be described using FIG. 7.

FIG. 7(a) is a sectional view of the camera viewed from the side, and FIG. 7(b) is a front view of the pressure plate 14 which presses the film 2 and forms a flat surface. The pressure plate 14 is configured to allow light to pass through only two windows 15 and 16, so that when the light emitter 8 lights up, the upper and lower sides of the film can be exposed. When a panoramic size photograph is taken with the camera of Example 3, Figure 5(c)
). In addition, in Example 3, Example 1 and Example 2
Unlike in the previous example, the upper and lower sides of the film were exposed when the film was stopped, rather than being exposed while the film was being wound.

[0013] The light emitting body may be an LED or a miniature lamp. Alternatively, a surface light emitter such as an electroluminescent device may be arranged opposite to the strip-shaped exposed portion shown in FIG.

[0014]

Effects of the Invention As explained above, the camera of the present invention can form a panoramic shooting screen without requiring a movable mask mechanism for forming a panoramic shooting screen. Weight increase can be prevented.

[Brief explanation of the drawing]

FIG. 1(a) is a schematic longitudinal sectional view of the main parts of a camera according to a first embodiment of the present invention, and FIG. 1(b) is a schematic diagram seen from the right side (back side of the camera) in FIG.

FIG. 2 is a schematic diagram showing the configuration of the main control system in the camera of the present invention.

FIG. 3 is a diagram showing an example of a light emitting body of the screen reduction exposure means in the camera of the present invention.

4 is a flowchart of control operations performed by the microcomputer 20 in the configurations of FIGS. 2 and 1. FIG.

FIGS. 5(a) to 5(c) are diagrams showing examples of panoramic screens realized by screen reduction exposure means provided in the camera of the present invention.

FIG. 6(a) is a schematic longitudinal sectional view of the main parts of a camera according to a second embodiment of the present invention, and FIG. 6(b) is a fixed mask 1 seen from the right side of (a).
0 rear view.

FIG. 7(a) is a schematic longitudinal sectional view of main parts of a camera according to a third embodiment of the present invention, and FIG. 7(b) is a rear view of the pressure plate 14 seen from the right side of FIG. 7(a).

[Explanation of symbols]

1... Photography lens, 2
...film 3...shutter,
4... Light-shielding cylinder, 6-8... Light-emitting body,
10... Fixed mask, 11... Hole, 14... Pressure plate,
15, 16...window, 2
0...Microcomputer, 21...Autofocus device,
22... automatic exposure device, 23... film feeding device,
24...Screen reduction exposure means, 27...Panorama switch, 32...LED, 34...Lamp.

Claims (3)

[Claims] 1. The present invention is characterized by comprising screen reduction exposure means for exposing the peripheral edge of the screen of the film positioned in the aperture section to an appropriate width to form a screen smaller than the screen size specific to the film. Camera to do. 2. The camera according to claim 1, wherein the screen reduction exposure means exposes an upper edge and a lower edge of the film. 3. The camera according to claim 1, wherein the screen reduction exposure means has a function of forming an unexposed portion outside the reduced screen.