JPH0443857Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a sunlight camera that prints film images onto photosensitive paper.

[Conventional technology and its problems]

Conventionally, a transparent plate and a back cover that can be opened and closed are provided inside a camera body that has a square exposure hole, and an image film and photosensitive paper are set between the back cover and the transparent plate, and the film image is printed onto the photosensitive paper. Nikko photographic machines configured to attach the camera are known.

The photosensitive paper used in this type of sunlight camera is low-sensitivity, and the printing time (time of exposure to direct sunlight) of this photosensitive paper can be determined appropriately by measuring it with a clock. There is no shutter mechanism for opening and closing the main body exposure hole. However, when determining the printing time of the photosensitive paper using a clock, if the shutter mechanism is equipped with a shutter mechanism that can be opened and closed manually, it is necessary to manually close the exposure hole of the main body before and after printing the photosensitive paper. It's very convenient.

Therefore, various studies were conducted to see if the mechanism of an ordinary camera shutter could be applied to a Nikko camera, but none of the conventional camera shutters had a structure that could be applied to a Nikko camera.

[Purpose of invention]

This invention was developed based on the above-mentioned circumstances, and its purpose is to provide a sunlight camera with a relatively simple construction and a shutter mechanism that can be opened and closed as desired by manual operation.

[Summary of the idea]

In order to achieve the above-mentioned object, this invention is a substantially right-angled triangle that is opened in the left-right direction around the upper left fulcrum and the lower right fulcrum of the rectangular exposure hole, and is closed so that the edges join at the diagonal position of the rectangular exposure hole. A pair of shaped left and right shutter plates, a rotating link that is pivoted on the upper right side of the rectangular exposure hole and that can be raised and rotated by operating a lever on the outside of the main body that is attached to the end of the support shaft; A horizontal connecting link whose right end is supported by a pin on the first link pin of the movable link and whose left end is supported by a pin on the link pin of the upwardly projecting arm of the left shutter plate, and whose upper end is supported by the second link of the rotary link. This apparatus is characterized in that a shutter machine is incorporated into the main body of the camera, comprising a vertical connecting link supported by a pin and whose lower end is supported by a link pin in the vicinity of the opening/closing fulcrum of the right shutter plate.

〔Example〕

Hereinafter, an embodiment of this invention will be described with reference to the drawings. This daylight camera includes a transparent plate 3 fixed in a camera body 2 having a rectangular exposure hole 1 and spaced apart from the body exposure hole 1. A back cover 4 that can be opened and closed is provided on the back side of the transparent plate to sandwich an image film and photosensitive paper (not shown) in a superposed state, and a manually operated back cover 4 is provided between the front wall of the main body 2 and the transparent plate 3. The shutter mechanism 5 is opened laterally as shown in FIG. 3 around the upper left fulcrum 6 and the lower right fulcrum 7 of the square exposure hole 1, and A pair of left and right shutter plates 8, 9 in a substantially right triangular shape whose inclined edges 8a, 9a are closed together at diagonal positions of the exposure hole 1 as shown in FIG. A heart-shaped rotating link 12 is supported on a support shaft 10 and is rotated up and down as shown in FIGS. 1 and 3 by an operating lever 11 attached to the end of the support shaft.
and the first link pin 12a of this rotation link 12
a horizontal connecting link 14 whose right end is supported by a pin and whose left end is supported by a link pin 13a of an upwardly projecting arm 13a of the left shutter plate 8; It is characterized by being composed of a vertical connecting link 15 which is supported by a pin on the right shutter plate 9 and whose lower end is supported by a link pin 16 near the opening/closing fulcrum of the right shutter plate 9 (lower right fulcrum 7 of the rectangular exposure hole 1). shall be.

When the shutter mechanism 5 configured as described above is pressed down by hand with the shutter plates 8 and 9 in the closed state shown in FIG. The left and right shutter plates 8, 9 are opened as shown in FIG. 3 for the linked operation by the vertical connecting links 14, 15, and when the operating lever 11, which is in the open state, is pushed upward by hand, the link 12, 14, and 15, the left and right shutter plates 8, 9 are joined at their edges and closed as shown in FIG.

[Effect of idea]

Since the sunlight camera of this invention is equipped with the manually operated shutter mechanism as described above, the shutter can be opened to print the photosensitive paper in direct sunlight, and after a certain period of time has elapsed, the You can close the shutter and take it back to the developing area, which is very convenient as there is no need to manually cover the exposure hole of the main body as in the past.

Moreover, since the shutter mechanism has a very simple structure, it can be easily integrated into the camera body, making it possible to provide a Nikko camera with a shutter mechanism at a relatively low price. be effective.

[Brief explanation of the drawing]

Fig. 1 is a back view of the Nikko camera of this invention with the shutter closed and the transparent plate and back cover removed; Fig. 2 is a vertical sectional view taken along the - line in Fig. 1;
FIG. 3 is an operational explanatory diagram showing the shutter open state in relation to FIG. 1. 1... Square exposure hole, 2... Camera body, 3...
Transparent plate, 4... Back cover, 5... Shutter mechanism, 6...
... Upper left fulcrum of square exposure hole, 7... Lower right fulcrum, 8... Left shutter plate, 9... Right shutter plate, 8a, 9a... Inclined edge, 10... Rotating link support shaft, 11... ...Operation lever, 12... Rotating link, 12a... First link pin of rotating link, 1
2b...Second link pin, 13...Upward protruding arm of the left shutter plate, 13a...Link pin of the same protruding arm, 14...Horizontal connection link, 1
5... Vertical connection link, 16... Link pin near the opening/closing fulcrum of the right shutter plate.

Claims (1)

[Scope of utility model registration request] A transparent plate is fixed in a camera body having a rectangular exposure hole so as to face and be spaced apart from the main body exposure hole, and an openable and closable back side that holds an image film and photosensitive paper in a superposed state on the back side of the transparent plate. with a lid,
The front wall of the main body and the transparent plate are opened in the left-right direction around the upper left fulcrum and the lower right fulcrum of the rectangular exposure hole, and are closed so as to be joined at the edges at diagonal positions of the rectangular exposure hole. A pair of left and right shutter plates having a substantially right-angled triangular shape, and a rotating link that is pivotally supported at the upper right position of the rectangular exposure hole and that is raised and rotated by operating a lever external to the main body that is attached to the end of the support shaft. , a horizontal connecting link whose right end is supported by a pin on the first link pin of the rotating link, and whose left end is supported by a pin on the link pin of the upwardly projecting arm of the left shutter plate; A Nikko camera incorporating a shutter mechanism comprising a vertical connecting link supported by a second link pin and whose lower end is supported by a link pin near the opening/closing fulcrum of the right shutter plate.