JPS5936729B2 - film guide - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film container that accommodates a film unit that can undergo diffusion transfer processing, and particularly to a film container that is provided with a film unit feeding function in the container itself.

Conventionally, so-called diffusion transfer photography has been applied to at least a photosensitive layer, an image-receiving layer, and a tearable processing liquid container containing a processing liquid for diffusing and transferring an image forming substance formed on the photosensitive layer to the image-receiving layer. Various integrated or integrated film units are known, and several types of film units are commercially available.

Some film containers are known for loading this type of film unit into a camera, but in conventional film containers of this type, the film unit is directly engaged with a part of the film unit and the film unit is placed at the exit of the container. Since the feeding means is provided on the camera body side, it is difficult to maintain the engagement precision necessary to reliably feed only the exposed film unit, and it is difficult to load the film container into the camera. When doing so, there was a problem that there was a risk of inadvertently damaging the engaging means on the camera side.

The present invention has been made in view of such problems, and includes:
It is an object of the present invention to provide a film container in which the film container itself has a film unit delivery function and can reliably deliver the film unit.

In the film container according to the present invention, the front wall portion defining the exposure opening is slidably guided in the feeding direction of the film unit in the container body, and the front wall portion defines the frontmost film unit. A first engaging means that engages with an engaging hole provided in the rear end or the film unit, and a second engaging means that engages with a feeding mechanism provided on the camera body side, The present invention is characterized in that by reciprocating the front wall portion once through the second engaging means, the film unit is fed out once using the first engaging means.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to illustrated embodiments.

In FIG. 1, 1 is a rectangular front cover plate which has an exposure opening 3 surrounded by low ribs 2 and forms the front wall of the film container; 4 is a longitudinal side portion 1a of the front cover plate 1; The main body 4 has peripheral walls 6, 7, 8, which stand up almost perpendicularly from the periphery of the rectangular rear wall 5. 9, forming a space 10 therein for accommodating a film unit.

Each side wall 7, 9 in the longitudinal direction of the container body 4 has a total of three guide pieces 10 integrally formed so as to protrude horizontally inward by an appropriate amount from each edge of the soil. At the same time, each side 1a of the front cover plate 1 is provided between the guide piece 10 and the guide piece 10, except for an escape hole 11 for integrally molding the guide piece 10 on the inner surface of each side wall 7, 9. ,1
A wall part having guide shoulders 12 for fitting in such a way as to pinch the front cover plate 1 is formed, and the front cover plate 1 is slidably guided in the longitudinal direction of the container body 1 without rattling.

Further, one end wall 6 in the longitudinal direction of the container body 4 has an upper edge formed from both ends 6a, 6a which are formed to be lower than the guide shoulders 12 of the side walls 7, 9 by the thickness of one film unit. The front end 1b of the front cover plate 1 is gradually lowered toward the front end and fits into the container body 4 from the longitudinal direction.
A film unit outlet 13 is formed between the two.

On the other hand, an end wall 8 facing the end wall 6 has an inner wall portion 8 that is continuous with the guide shoulder 12 at the same height as the upper edge of each side wall 7, 9.
It has an edge 8b formed one turn outward from a, and the upper edge 8b forms a stepped portion that abuts the rear end 1b of the front cover plate 1 during backward movement. As mentioned above, the container body 4
The front cover plate 1, which is slidably fitted longitudinally into the film unit outlet 13, is attached to both side walls 7 along the upper edge 1b on the film unit outlet 13 side.
, 9, and has a protrusion 14 having a width suitably narrower than the distance between the mutually opposing guide pieces 10, 10. On the other hand, on the back side of the rear edge 1c, as shown in FIG. 2, a film unit is provided. a pair of claws 15a standing vertically from the back surface for engaging both sides of the rear edge to feed the film unit;
15a on both sides.

As shown in FIG. 3, inside the film container, in order from the front cover plate 1 side, there is a light-shielding protective cover sheet 16, and a plurality of film units 17, . . . , 17 stacked in the same direction.
, pressure plate 18 are loaded in this order, and the pressure plate 18 is loaded with the protective cover sheet 16 and the film unit 17 following it.
, . . . , 17 are pressed flatly from the back side toward the front cover plate 1 to hold these sheets 16, 17 . . . , 17 so that they do not move inadvertently.

Initially, the rear end edge 1c of the front cover plate 1 is the upper edge 8 of the end wall 8.
It is in the double movement position where it is stopped by b, and the unit engaging portion 15
is located at a stepped portion formed between the upper edge 8b and the inner wall portion 8a, and can be engaged with the rear end of the frontmost protective cover sheet 16.

In this state, the front edge 1b of the front cover plate 1 is at a position set back by a predetermined distance from the end wall 8 forming the film unit outlet 13, and is connected to a feeding mechanism (described later) provided on the camera body side. When the mating protrusion 14 is moved forward, the protective cover sheet 16 hooked by the unit engaging portion 15 is sent out by the stroke, and the tip is caught between the pair of unfolding rollers 19, 19. The protective cover sheet 16 is sent out of the camera by the rotation of the developing rollers 19, 19, and the light shielding of the film container is released. In addition, one side of 20 is weakly adhered to the front end of the back side of the protective cover sheet 16, and the other side is attached to the end wall 6.
A flexible light-shielding curtain strongly adhered to the outer surface of the protective cover sheet 16 shields the film unit outlet 13 from light by its own elasticity even after it is peeled off from the protective cover sheet 16 as it is fed out.

After sending out the protective cover sheet 16, each time the film unit 17 at the forefront facing the exposure aperture 3 is exposed,
The film unit 17 is sent out from the film unit outlet 13 in the same way as the protective cover sheet 16, with the processing liquid container part 17a at the top, and the pair of developing rollers 19 pressurize the processing liquid container part 17a to tear it apart. While feeding the film unit 17, the built-in processing liquid is spread inside the film unit 17, and the surplus liquid is pushed into the surplus liquid reservoir 17b of the film unit 17.

Next, the feeding mechanism that engages with the engagement protrusion 14 of the front cover plate 1 from the camera body side and drives reciprocally will be explained with reference to FIG. This lever 30 is a reciprocating lever that can freely reciprocate with a stroke, and the lever 30 is always urged in the backward movement direction by a return spring 31 that is stretched from the camera body side to the lever 30, and a side plate 32 that falls downward at the tip of the lever. is moved forward against the force of the return spring 31 by the rotation of the crank pin 34 mounted on the crank gear 33.

This reciprocating lever 30 further includes a fork-shaped engagement portion that fits into the end of the engagement protrusion 14 of the front cover plate 1 from its longitudinal direction, and interlocks the end portion of the engagement protrusion 14 in the forward and backward directions. 35 is supported above the distal end portion, and when the film container is loaded into the camera body, the engagement protrusion 14 of the front cover plate 1 is reciprocatably fitted. The crank gear 33 and the processing roller 1
Roller drive gear 3 that drives a gear 36 provided at the end of 9
A gear system for driving 7 is bearinged between two boards 38 and 39, and uses an electric motor 40 as a driving source. The electric motor 40 drives a worm 42 via a coupling 41, and a gear 44 coaxial with a worm wheel 43 that meshes with the worm 42 drives a three-series gear system.
The torque of the electric motor 40 is transmitted to the branch gear 45 to be driven. This branch gear 45 drives a gear 4T which is coaxial with the crank gear 33 across the board 38 via a gear 46 which is coaxial with the branch gear 45.
8 to drive the roller and drive gear 3T, and furthermore, a timing gear 51 having a timing pin 50 implanted therein is driven via a reduction gear train 49 directed toward the rear end of the reciprocating lever 30. As mentioned above, the reciprocating lever 30 that is reciprocated by the crank pin 34 is closed at its reciprocating end.
The locking piece 30a protruding from the longitudinal side edge of the crank pin 34 is stopped once by the locking arm 52a of the dogleg-shaped locking lever 52, and the rotation of the crank pin 34 is stopped once. will no longer follow.

At the end of one rotation, the timing pin 50, which synchronizes at a slow speed with the rotation of the crank pin 34, moves the other arm 52b of the locking lever 52 against the force of a spring (not shown) around the hour hand in the figure. The reciprocating lever 30 is rotated to release the lock, and the reciprocating lever 30 is returned to the delivery standby position by the spring force of the return spring 31. When the reciprocating lever 30 returns, the electric motor 40 controlled by a control circuit (not shown) stops, and the film unit is fed out from the film container and the film unit is fed out while the processing liquid is being spread. The process ends.
In addition, as the driving engagement means provided on the front cover plate 1, instead of the linear protrusion 14 shown in FIG. 1, as shown in FIG. A cam protrusion 60 is provided so that the stroke in the sliding direction of the cover plate 1 has a length necessary for feeding the film unit, and although the cam protrusion 60 is not specifically shown, The front cover plate 1 may be made to reciprocate in its longitudinal direction by engaging with an engagement means provided in the front cover plate 1 and reciprocating the engagement means in the width direction of the front cover plate 1.

Also, at both ends of the cam protrusion 60, racks 61, 61 provided in the longitudinal direction of the front cover plate 1 are meshed with and guided by pinions (not shown) provided on the camera body side.
ensure smooth operation.

Of course, the racks 61, 61 mentioned above are engaged with a pinion 62 as shown in FIG. 6, and the pinion 62 is reciprocated by the rack 63 provided on the reciprocating lever 30 explained in FIG. It may be made to reciprocate. On the other hand, as the engaging means for engaging the film unit 17,
As shown in FIG. The film unit may also be fed out by engaging the film unit.

Furthermore, in order to more completely shield the film container from light, as shown in FIG. However, as shown in FIG. 9, the upper edges Ta, 9a of the side walls T, 9 are bent outward to provide guide shoulders 90 continuous in the longitudinal direction, and the guide pieces 10 An escape hole 11 for molding may be provided using the guide shoulder 90, and the escape hole 11 may be shielded from light by the side portion 1a of the front cover plate 1, as shown in FIG.

As described above in detail, the present invention supports a front wall of a film container on a container body so as to be slidable in the film unit feeding direction, and a first engagement member that engages the film unit with the front wall. A second engaging means is provided to engage with a feeding mechanism provided on the camera body side, and the front wall portion is reciprocated once by the operation of the feeding mechanism, so that the film units are successively stacked. According to the present invention, the film container itself can have a film unit feeding function, so that the film unit can be fed stably, and the film unit can be fed out stably. It is easy to connect with the delivery mechanism on the side of the camera and does not require much precision for the connection, and the operating space required for the delivery mechanism on the side of the camera can be significantly reduced, at least in the optical axis direction. The side delivery mechanism can be arranged with more leeway, and the thickness of the camera can be reduced.

Furthermore, since the film container according to the present invention can be molded using a mold as shown in the examples, it can be manufactured easily and at low cost.

It goes without saying that the present invention can be applied and modified in various ways within the scope of the technical idea of the present invention, and is not limited to the illustrated embodiments.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a film container showing an embodiment of the present invention, FIG. 2 is a perspective view of the back side of the front cover plate of the film container shown in FIG. 4 is a perspective view showing an example of the delivery mechanism on the camera body side; FIG. 5 is a front perspective view showing another example of the front cover plate; FIG. 6 7 is a perspective view of the main parts showing a modification of the above-mentioned delivery mechanism, FIG. 7 is a perspective view of the main parts showing another example of the front cover plate, and FIG. 8 shows the light-shielding cover installed in the film container of FIG. FIG. 9 is a partial perspective view showing another example of the film container, and FIG. 10 is a vertical sectional view of a main part of the same film container. 1...Front cover plate, 4...Container body, 10
...Guide piece, 12 ...Guide shoulder, 1
4... Engagement means with the camera body side, 15...
...Means for engaging with the film unit, 17...
・Film unit.

Claims (1)

[Claims] 1. In a film container that has an exposure opening on at least the front wall and a film unit outlet on one side surface, and is configured to press the film units stacked inside and capable of diffusion transfer processing with a pressure plate, the exposure opening A front wall defining a film unit is slidably guided to the container body in the feeding direction of the film unit, and the front wall engages a frontmost film unit during forward movement and transports the film unit to the film unit exit. A film container comprising: a coupling means; and a second engagement means protruding from a wall surface to engage with a delivery mechanism provided on the camera body side.