JPH08179418A - Camera - Google Patents

Abstract

PURPOSE: To enable accurate imprinting with an information imprinting device by adopting such a constitution that the surface of a film pressing plate facing the edge part of a film is inclined along the curled surface of the film. CONSTITUTION: The front surface of the film pressing plate 2 in a position facing a groove 1c is constituted as a slope 2a extended forward along the curled edge part of the film F. Therefore, a large gap provided in a conventional camera does not exist between the front surface of the film pressing plate 2 in a part where a hole 2b is made and the bottom edge part of the film F, so that a luminous flux for imprinting information which is emitted from the hole 2b to the film F can not be widely diffused outside the hole 2b. Thus, character information, a bar code, etc., can be accurately imprinted in the fixed position of the bottom edge part of the film F, that is, there is no danger of imprinting the character information and the bar code in a photographic picture frame.

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 camera equipped with an information imprinting device for imprinting information on the lower edge of a film.

[0002]

2. Description of the Related Art In recent years, high-definition television technology has been put into practical use in Japan, and accordingly, television receivers with high-definition screens are already on the market.

Reflecting the trend of screen changes in such electronic image devices, there is a patent application for a new standard film for the silver salt film, which replaces the Leica standard film that has been conventionally used for still cameras and projection devices. Recently, a lot has been done (for example, Japanese Patent Laid-Open No. 4-1).
19441, U.S. Pat. No. 4,973,997).

FIG. 3 shows a new format film 10 disclosed in the above-referenced Japanese Patent Publication and US Pat.
In this film 10, there is no perforation in the lower edge portion of the film, and the lower edge portion of the film is an information recording portion.

In the figure, reference numerals 11a and 11b are print range instruction codes for instructing the printer of the print range at the time of print production, and the codes 11a and 11b.
Is imprinted by the information imprinting device in the camera immediately after shooting, and 20 is imprinted at the time of film production.
X code (American Photographic Manufacturers Association Standard: NAPM IT
1, 14-1993).

When both the codes 11a and 11b are imprinted on the film 10 which has been photographed, the printer is instructed to set the printing range of the photographed frame to L (conventional Leica size), and 11a Or, if only one of 11b is imprinted, the print range of the photographed frame is instructed to be P (pseudo panorama size), and if both 11a and 11b are not imprinted, photographing is performed. The printer is instructed to set the print range of the completed frame to H (high definition size).

On the other hand, the DX code 20 is a code for the sync signal.
It is composed of a code 20a and a code 20b for other information. The code 20a is read on the upper read line 30, and in synchronization with this, the code 20b is read on the lower read line 40. It is imprinted so that it can be read in.

Then, the print range instruction code 11
By imprinting a and 11b on the same read line 40 as the code 20b, the code 20b can be read at the same time as the code 20b is read.

The print range instruction codes 11a and 1
Although it is necessary to provide an information imprinting device in the camera in order to imprint 1b on the film, it is possible to imprint by using a data imprinting device conventionally provided in the camera.

There are various known data imprinting devices equipped in a camera, but the following is a "tunnel type film gate" (published by Photo Industry Co., Ltd., extraordinary in April 1983). Special Issue "Camera Lens Encyclopedia" Page 137-
FIG. 4 and FIG. 5 regarding a data imprinting apparatus utilizing a film guide structure referred to as page 139).
Will be described with reference to.

FIG. 4 and FIG. 5 are a vertical sectional view and an enlarged vertical sectional view of an aperture portion of the camera.

In the figure, X is the central axis of the aperture A formed in the camera body 300, that is, the optical axis of the camera, and 300b is the upper and lower edges of the aperture A and the traveling direction of the film F ( Well-known inner rails (hereinafter abbreviated as inner rails) 300a extending in the direction orthogonal to the paper surface, 300a are arranged at positions above and below the inner rail 300b. An outer rail extending in parallel with the inner rail (hereinafter abbreviated as outer rail), 200 is a known film pressure plate.

The front surface of the film pressure plate 200 (the front side of the camera, that is, the right side in the figure) is the outer rail 300.
A gap for allowing the film F to pass is provided between the film sliding contact surface of the inner rail 300b and the front surface of the film pressure plate 200. A groove 300c extending parallel to the rail is formed between the pair of upper and lower inner and outer rails, and the upper and lower curled edges of the film F are inside the groove 300c. It's getting in.

The film guide structure in such an aperture portion is called a "tunnel type film gate", and a space surrounded by the step between the outer rail 300a and the inner rail 300b and the film pressure plate 200 is defined. It is called a "tunnel".

Since the film F has curling that bends toward the photosensitive surface along the longitudinal direction, the film F is pressed by the pressure plate 20.
When entering the gap between 0 and the inner rail 300b, the film in the gap is pushed by the pressure plate 200 and contacts the inner rail 300b, but the central portion of the film F is as shown in the figure. In the center of the aperture A, that is, in the vicinity of the optical axis, the front plate is bent away from the pressure plate 200, and the upper and lower edges of the film F enter the upper and lower grooves 300c (that is, tunnels) according to their own curl.

As shown in the figure, a hole 200a is formed at the lower edge of the pressure plate 200 at a position facing the groove 300c, and the hole 200a has a light emitting diode for imprinting information.
LE (hereinafter referred to as LED) 400 is fitted and LE
Predetermined information is imprinted on the lower edge portion of the film by the light beam emitted from D400 to the lower edge portion of the film in the groove 300c. The hole 200a of the film pressure plate 200 is the LED 400
It plays the role of a diaphragm that narrows the outgoing light flux.

[0017]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As shown in FIG.
In a camera having an information imprinting device of the type in which a light emitting beam of an LED is applied to the lower edge of the film by utilizing a "tunnel type film gate", the camera is in a tunnel (that is, the groove 300
Since the lower edge of the film is curled in (in c), the closer it is to the lower side, the wider the gap between the pressure plate 200 and the film F becomes,
The film surface is a surface that obliquely intersects the luminous flux of the LED 400. For this reason, the luminous flux of the LED is spread and radiated on the film surface, and accurate imprinting cannot be performed, and imprinting information may get into the shooting screen or individual imprinting information may be continuous. was there.
Also, since the exposure sensitivity from the back side of the film varies greatly depending on the type of film, the higher the exposure sensitivity on the back side of the film, the more the light flux from the LED spreads on the film side and the image of the imprint information spreads over a wider range. In addition, there is a drawback that the risk of entering the shooting screen becomes high.

[0018]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a camera having an information imprinting device which eliminates the drawbacks of the information imprinting device of the conventional camera described above and which is suitable for using the film of the new standard. Is. Below, the purpose of the present invention will be clarified for each claim.

An object of the present invention is to provide a pair of inner rails which extend in parallel along a pair of parallel edges of the aperture and which are in sliding contact with one surface of the film. The inner rails are arranged at outer positions of the pair of inner rails.
A pair of outer rails extending in parallel to the inner rail and projecting higher than the inner rail, and a film sliding contact surface of the inner rail pressed against the outer rail. A film pressure plate that forms a film running gap between the
A groove extending parallel to the two rails between one of the outer rails and one of the outer rails, and into which a curled edge of the film is inserted, and a position facing the groove. In the information imprinting element carried on the film pressure plate,
And a surface of the film pressure plate facing the edge of the film is formed as an inclined surface inclined along the curled surface of the film. It is to be.

An object of the invention of claim 2 is "a pair of inner rails extending in parallel along a pair of parallel edges of the aperture and slidingly contacting one surface of the film, and The inner rails are arranged at outer positions of the pair of inner rails.
A pair of outer rails extending in parallel to the inner rail and projecting higher than the inner rail, and a film sliding contact surface of the inner rail pressed against the outer rail. A film pressure plate that forms a film running gap between the
A groove extending parallel to the two rails between one of the outer rails and one of the outer rails and having a curled edge of the film to enter; and a groove opposed to the groove. In a camera comprising an information imprinting element carried on the film pressure plate at a position, a plane of the film imprinting plate facing the film edge has a carrying position of the information imprinting element as an apex. A first inclined surface which descends along a direction perpendicular to the longitudinal direction of the film, and a second inclined surface which descends along a direction parallel to the longitudinal direction of the film with the carrying position of the information imprinting element as an apex. And to form a camera.

[0021]

In order to solve the above-mentioned problems, the invention according to claim 1 states that "a pair of films of one of the films extends in parallel along a pair of parallel edges of the aperture. A pair of inner rails that are in sliding contact with the surface, and are disposed at outer positions of the pair of inner rails, extend parallel to the inner rails, and are higher than the inner rails. A pair of projecting outer rails; a film pressure plate which is pressed against the outer rail and forms a film running gap between the inner rail and the film sliding contact surface; A groove extending between one of the inner rails and one of the outer rails in parallel with the both rails, the groove being formed so that the curled edge of the film is inserted into the groove; In a camera having an information imprinting element carried by the film pressure plate at a position facing each other. , The surface of the film pressure plate opposed to the film edges mosquitoes of the film - to provide a camera ", characterized in that it is constructed as a sloping surface inclined along Le the surface.

According to the camera of the present invention, since the surface of the film pressure plate facing the edge of the film is inclined along the curl of the film, the surface of the film pressure plate and the edge of the film are separated from each other. Since there is no large gap between them, there is no risk that the information-imprinting light beam emitted from the information-imaging element will spread on the surface of the film, and information can be clearly imprinted at a predetermined position on the edge of the film.

In order to solve the above-mentioned problems, the invention of claim 2 is, "A pair of inner layers extending in parallel along a pair of parallel edges of the aperture and slidingly contacting one surface of the film. -, And a pair of outer rails that are arranged at outer positions of the pair of inner rails, extend parallel to the inner rail, and project higher than the inner rail. And a film pressure plate which is pressed against the outer rail and forms a film running gap between the inner rail and the film sliding contact surface, and one of the inner rail and the film pressure plate. A groove extending parallel to both of the outer rails and configured so that a curled edge of the film is inserted, and the film pressure plate at a position facing the groove. In a camera having an information imprinting element carried on the film, The surface of the film pressure plate to a first inclined surface which descends along the longitudinal direction perpendicular to the direction of the film as the vertex of the carrying position of the element imprinting the information,
And a second inclined surface that descends along a direction parallel to the longitudinal direction of the film with the carrying position of the information imprinting element as the apex.

According to the camera of the present invention, on the surface of the film pressure plate facing the film edge portion, the film is lowered along the direction perpendicular to the longitudinal direction of the film with the carrying position of the information imprinting element as the apex. The first inclined surface and the second inclined surface that descends along the direction parallel to the longitudinal direction of the film with the carrying position of the information imprinting element as the apex. Since the film pressure plate surface and the film edge portion are close to each other by the inclined surface of the film, there is no fear that the information-imprinted light flux emitted from the information-imprinting element spreads on the surface of the film. Information can be clearly imprinted at a predetermined position, and since the film is smoothly guided to the information imprinting position by the second inclined surface, there is no possibility that the film running will be hindered.

[0025]

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

FIG. 1 shows the aperture of a camera according to an embodiment of the present invention.
FIG. 2 shows a front view of the lower edge of the film pressure plate 2 (that is, the surface facing the inner and outer rails of the camera aperture) in the camera of this embodiment. It is a perspective view of the state which turned up.

In FIG. 1, A is an aperture formed in the camera body 1, X is a central axis of the aperture A, that is, the optical axis of the camera, 1a is parallel along the lower edge of the aperture A. An inner rail extending in the direction (perpendicular to the plane of the paper), 1
b is an outer rail extending parallel to the inner rail 1a at a position below the inner rail 1a, and 1c is an inner rail 1a and an outer rail 1b.
A groove 2 formed between the film 2 and the groove 2 is pressed against the protruding surface of the outer rail 1b and forms a running gap of the film F between the groove 2 and the protruding surface of the inner rail 1a. Is a hole penetrating the pressure plate 2 at a position facing the groove 1c (that is, an opening for imprinting information), and 3 is fitted in the hole 2b so as to face the lower edge portion of the film in the groove 1c. An LED for imprinting information. The characteristics of the camera of this embodiment are:
The front surface (the surface on the right side in the figure) of the film pressure plate 2 at a position facing the groove 1c is configured as an inclined surface 2a protruding along the curled edge of the film F toward the front side (to the right side in the figure). It is that you are. For this reason, as shown in FIG. 1, the film pressure plate 2 at the portion where the hole 2b is opened.
There is no large gap between the front surface of the film and the lower edge of the film F as in a conventional camera. Therefore, since the information-imprinted light flux emitted from the hole 2b toward the film F does not spread widely outside the hole 2b, the character information and the bar code are accurately displayed at a predetermined position on the lower edge of the film F. There is no risk that the character information or bar code will be imprinted on the photographing screen.

The vicinity of the opening of the hole 2b on the front surface of the film pressure plate 2 is thicker than other portions as shown in FIG. 2, and the vicinity of the opening of the hole 2b is defined as the maximum thickness portion from that portion. The first inclined surface 2a that descends in the direction perpendicular to the film traveling direction (the film longitudinal direction) is formed, and the second inclined surface 2c that descends from the thick portion along the film traveling direction is formed. There is. The second inclined surface 2
When the film front end is automatically fed immediately after the film is loaded into the camera and is wound around the spool, the film front end is not caught by the thick portion of the film pressure plate 2 of the spool. It is an inclined surface for smoothly guiding the leading end portion of the film so that the film can pass in one direction.

[0029]

According to the invention of claim 1, the surface of the film pressure plate facing the edge portion of the film is the cover of the film.
Since there is no large gap between the film pressure plate surface and the film edge because it is inclined along the line, there is a risk that the information-imprinting light flux emitted from the information-imaging element will spread on the surface of the film. Instead, information can be clearly imprinted at a predetermined position on the edge of the film. In addition, information can be imprinted without being significantly affected by the light sensitivity of the back surface of the film.

Further, the camera of the present invention has an information imprinting device which is an improvement of the known data imprinting device constructed on the basis of the conventionally known "tunnel type film gate", so that it is inexpensive. It can be manufactured at low cost, and a new standard film can be used.

According to the invention of claim 2, on the surface of the film pressure plate opposite to the edge of the film, the carrying position of the information imprinting element is taken as an apex along the direction perpendicular to the longitudinal direction of the film. Since the first inclined surface that descends and the second inclined surface that descends along the direction parallel to the longitudinal direction of the film with the carrying position of the information imprinting element as the apex are formed, Since the film pressure plate surface and the film edge portion are brought close to each other by the one inclined surface, there is no fear that the information-imprinting light flux emitted from the information-imprinting element spreads on the surface of the film. Information can be clearly imprinted on a predetermined position of the film, and since the film is smoothly guided to the information imprinting position by the second inclined surface, there is no possibility that the running of the film is hindered. − Di It is possible to smoothly perform the running of the film leader portion upon grayed.

[Brief description of drawings]

FIG. 1 is a half longitudinal sectional view of an aperture portion of a camera of the present invention.

FIG. 2 is a partially cutaway perspective view of the film pressure plate 2 shown in FIG. 1 with its lower front edge facing upward.

FIG. 3 is a plan view of a new standard film proposed in Japanese Patent Laid-Open No. 4-119441.

FIG. 4 is a vertical sectional view of an aperture portion of a conventional camera.

5 is an enlarged view of a conventional data imprinting device using the configuration of FIG.

[Explanation of symbols]

1, 300 ... Camera body A ... Aperture 1a, 300b ... Inner rail 1b, 300a ...
Outer rail 10, F ... Film 2, 200 ... Film pressure plate 3, 400 ... LED 2b, 200a ...
Holes 2a, 2c ... Inclined surfaces 11a, 11b, 20, 20a, 20b ... Codes 30, 40 ... Readout line

Claims (2)

[Claims] 1. A pair of inner rails extending in parallel along a pair of parallel edges of the aperture and slidingly contacting one surface of the film, and each of the pair of inner rails. A pair of outer rails which are disposed at outer positions of the outer rails, extend parallel to the inner rails, and project higher than the inner rails.
Film, a film pressure plate that is pressed against the outer rail and forms a film running gap between the inner rail and the film sliding contact surface, and one of the inner rail and the outer rail. A groove extending between one of the rails in parallel with the both rails and having a curled edge of the film to be inserted, and the groove is carried on the film pressure plate at a position facing the groove. And a surface of the film pressure plate facing the edge of the film is formed as an inclined surface inclined along the curled surface of the film. A camera characterized by. 2. A pair of inner rails extending in parallel along a pair of parallel edge portions of the aperture and slidingly contacting one surface of the film, and each of the pair of inner rails. A pair of outer rails which are disposed at outer positions of the outer rails, extend parallel to the inner rails, and project higher than the inner rails.
Film, a film pressure plate that is pressed against the outer rail and forms a film running gap between the inner rail and the film sliding contact surface, and one of the inner rail and the outer rail. A groove that extends in parallel with one of the rails and is configured so that the curled edge of the film is inserted, and the film pressure plate at a position facing the groove. In a camera having an information imprinting element carried, the surface of the film pressure plate facing the edge of the film is perpendicular to the longitudinal direction of the film with the carrying position of the information imprinting element as an apex. A first inclined surface that descends along a different direction, and a second inclined surface that descends along a direction parallel to the longitudinal direction of the film with the carrying position of the information imprinting element as an apex. A camera characterized by being.