JPH07199346A - Instant camera - Google Patents

Abstract

PURPOSE:To prevent harmful light or dust, etc., from entering from the ejection port of an instant film unit. CONSTITUTION:An ejection port cover 30 is provided at the ejection port 26 of the instant film unit 25. The cover 30 is constituted of a cover main body 32, an attaching bracket 35, an attaching shaft 34 and a torsion spring. The cover main body 32 is attached to be freely opened/closed to a main body part 10 with the shaft 34. The cover main body 32 is energized by the torsion spring in a closing direction so as to come in tight contact with the main body part 10. The energizing force of the torsion spring is set to such weak force that the cover 30 is pressed to be opened by the ejection of the unit 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instant camera, and more particularly to an instant camera which prevents dust and the like from adhering to a developing roller and blocks harmful light reaching the unexposed film through between the developing rollers. It is about.

[0002]

2. Description of the Related Art An instant camera using a self-developing type film unit has a great feature that a printed photograph can be obtained on the spot, and it is used for various purposes. Among them, in an instant camera that uses a mono-sheet type film unit, when the release button is pressed and the exposure is completed, the well-known scraping claw moves in the notch formed in the exposed frame of the film pack in conjunction with this. And scrape out the frontmost film unit. In the film unit thus scraped out, a developing solution pod is cleaved by a pair of developing rollers, and the developing solution contained in the developing solution pod is uniformly spread on the photosensitive emulsion surface and then discharged to the outside of the camera. At this point in time, the film unit has completed the necessary processing, and after the elapse of a predetermined time, a print photograph can be obtained.

[0003]

In such an instant camera, the developing solution pod is cleaved by the developing roller to develop the developing solution on the photosensitive emulsion surface. May adhere to the spreading roller. For this reason, the developer adhering to the roller surface easily attaches dust or the like that has entered from the discharge port of the film unit. Particularly, in the type in which the discharge port is opened upward, dust and the like are often attached. Due to the adhesion of dust and the like to the roller surface, the smoothness of the roller surface is lost and the roller pressure of the portion where the dust and the like are adhered increases when the developer is spread, so that the developer is uniformly spread on the photosensitive emulsion surface. It will be difficult. As a result, there is a problem that uneven development of the instant film unit occurs. In addition, when the discharge port is irradiated with light of high illuminance for a long time, harmful light may reach the unexposed film through the gap between the discharge port and the roller, and an unnecessary image may be formed.

The present invention is intended to solve the above-mentioned problems, and prevents dust and the like from adhering to the spreading roller, and covers the discharge port when unnecessary to prevent harmful light from reaching the unexposed film. It is an object to provide an instant camera that is designed to prevent this.

[0005]

In order to achieve the above object, the present invention relates to a discharge port cover for covering a discharge port, a hinge portion for opening and closing the discharge port cover to a camera body, and a close contact with the camera body. As described above, the urging means for urging the discharge port cover in the closing direction is provided, and the urging means is set to the urging force such that the discharge port cover is pushed and opened by discharging the instant film unit.

[0006]

The instant film unit is exposed by pressing the release button, and the exposed film unit is discharged from the discharge port to the outside of the camera by the developing roller. At the time of this discharge, the developer pod is cleaved by the developing roller, and the developer is uniformly spread on the surface of the photosensitive emulsion. When the film unit is discharged from the discharge port, the tip of the film unit pushes the discharge port cover upward. As a result, the discharge port cover is opened, and the film unit is discharged from the discharge port. When the discharged film unit is taken out from the discharge port, the discharge port cover is closed by the biasing means and the discharge port is closed. As described above, since the discharge port is covered by the discharge cover except when the film unit is discharged, dust and the like do not enter through the discharge port, and the adhesion of dust and the like to the developing roller is prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 2 showing the use state of an instant camera embodying the present invention, this camera has a main body 10 having a thin profile, a lens board 11 which can be raised and lowered with respect to the main body 10, and this lens. Lens stays 12 and 13 that interlock with the ups and downs of the board 11, a holding cover 14 that interlocks with the operation of the lens stay 13, and a bellows unit 15 fixed between the main body 10 and the lens board 11.
It is composed of a grip 16 provided on the main body 10.

The lens board 11 is provided with a taking lens 20 on the front surface, a shutter and a diaphragm mechanism inside the front surface, and is laid down on the front surface of the main body portion 10 via a hinge portion 21 when the camera is not used. Also, the lens stay 1
Reference numerals 2 and 13 are attached between the lens board 11 and the main body 10 so as to interlock with the ups and downs of the lens board 11. A strobe light emitting section 23 and a finder 24 are provided on the upper front surface of the main body section 10. Further, the grip 16 is provided with a release button 17.

As shown in FIG. 1, on the upper surface of the main body 10,
A discharge port 26 for discharging the exposed film unit 25
And a discharge port cover 30 that covers the discharge port 26. A back lid 27 is provided on the back surface of the main body portion 10 via a hinge portion, and when the back lid 27 is opened, a film pack storage chamber 33 is exposed, and a mono-sheet type film pack is stored in the film pack storage chamber 33. 28 is loaded.

A pair of developing rollers 31 are provided above the film pack storage chamber 33. The developing roller 31 crushes the developing solution pod 25a while discharging the exposed film unit 25 to spread the developing processing solution on the photosensitive emulsion surface.

The film pack 28 is a developer pod 25.
The film units 25 provided with a are stacked and accommodated, and as is well known, a slit for discharging the exposed film units to the developing roller 31 side is formed in the upper part. Further, an opening that defines the photographing screen range is formed on the front side.

As shown in FIG. 3, the outlet cover 30 is
It is composed of a cover body 32, a mounting shaft 34 of the cover body 32, a mounting bracket 35, and a torsion spring 36.
The mounting brackets 35 are formed so as to project from both ends of the upper surface of the main body 10. The cover body 32 is formed with a notch 37 into which the mounting bracket 35 is inserted, and a through hole 38 for the mounting shaft 34, and is rotatably mounted on the mounting bracket 35 by the mounting shaft 34.

The torsion spring 36 is arranged in the spring accommodating recess 39 of the cover body 32 so as to be wound around the mounting shaft 34. One end 36a of the torsion spring 36 is inserted into a locking hole 32a provided in the cover body 32, and the other end 36b is inserted into a locking hole 34a of the mounting shaft 34. It is biased so as to be in close contact with the upper surface of the portion 20. The torsion spring 36 causes the cover main body 32 to be in close contact with the upper surface of the main body portion 10 with a weak biasing force so as to prevent the film unit 25 discharged from the discharge port 26 from being bent or bent.

Next, the operation of the instant camera will be described. In the unused state where the photographing is not performed, the lens board 11 is compactly folded so as to lie down on the main body 10 as shown in FIG. At the time of use, the lens board 11 is raised from the main body 10 to be in use. The photographing is performed by pressing a release button as is well known. As a result, the shutter and diaphragm mechanism are activated to expose the subject light incident from the taking lens 20 to the film unit. After completion of the exposure, as shown in FIG. 1, the developing roller 31 rotates to discharge the exposed film unit 25 to the outside from the discharge port 26. At this time, the developer pod 25 of the exposed film unit 25
a is crushed and the developing solution is uniformly spread on the surface of the photosensitive emulsion.

When the film unit 25 is discharged from the discharge port 26 by the rotation of the developing roller 31, the discharge port cover 30 is pushed up by the tip of the film unit 25, and the discharge port cover 30 is opened. Since the torsion spring 36 (see the drawing) that biases the discharge port cover 30 has a weak biasing force, the film unit 25 is not bent or bent when the film unit 25 is discharged. After the developing roller 31 stops rotating and finishes discharging, it is pulled out from the discharge port 26. When the film unit 25 is pulled out, the discharge port cover 30 does not push up the film unit 25 and is closed by the biasing force of the torsion spring 36 so as to cover the discharge port 26. Therefore, since the discharge port 26 is closed by the discharge port cover 30 except when the film unit 25 is discharged, dust and the like do not enter from the discharge port 26 and the developing roller 3
It is possible to prevent dust and the like from adhering to 1. As a result, the smoothness of the peripheral surface of the developing roller 31 is not impaired,
No uneven development of the developer.

In the above embodiment, the discharge port is provided in the camera provided on the upper surface of the main body. However, the position of the discharge port is not limited to this, and the discharge port may be provided on the lower surface or the side surface of the main body. can do. Further, as the urging means for urging the discharge port cover toward the main body, a leaf spring or another spring material may be used in addition to the torsion spring. Further, in the above embodiment,
Although the mounting bracket has the same height as the cover body and is exposed to the outside, the mounting bracket may be covered with the cover body so as not to be seen from the outside.

In the above embodiment, the discharge port 26 is closed by the single discharge port cover 30, but in addition to this, as shown in FIGS. 5A and 5B, the discharge port cover 40 is provided. Is divided into two at the position of the discharge port 39, and two hinge portions 43, 44 are provided.
Then, the split covers 41 and 42 may be attached to the main body 45. Also in this case, a torsion spring similar to that in the above-described embodiment is used to urge the divided cover to come into close contact with the main body. This urging force is the film unit 2
The urging force is such that the split covers 41 and 42 are easily opened by discharging 5. By forming guide surfaces 41a and 42a that are inclined surfaces on the mating surfaces of the divided covers 41 and 42, the divided covers 41 and 42 can be easily pushed open. In the case of this embodiment, since the split covers 41 and 42 are opened on both sides, the opening angle can be set small, and as shown in FIG. 5B, the discharge port 26 is also discharged when the instant film unit is discharged. Since it is almost blocked, the invasion of dust and the like can be further reduced.

[0018]

As described above, according to the present invention,
Since the outlet cover of the instant film unit is provided, it is possible to prevent dust and the like from entering the camera. Therefore, dust and the like will not adhere to the developing roller, and the smoothness of the peripheral surface of the developing roller will be maintained.
The development unevenness of the developing solution is eliminated. In addition, the instant film unit is not damaged by the dust or the like that has adhered. In addition, a biasing means for biasing the outlet cover in the closing direction is provided so as to be in close contact with the camera body, and the biasing means is set to a biasing force such that the outlet cover is pushed and opened by the discharge of the instant film unit. Therefore, the film unit to be ejected can be smoothly ejected without bending or bending the ejected film unit.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an instant camera of the present invention.

FIG. 2 is a perspective view showing the instant camera.

FIG. 3 is a front view in which a part of a discharge port cover is cut away.

FIG. 4 is a perspective view showing a state when the instant camera is not used.

FIG. 5 is an enlarged sectional view showing a main part of another embodiment of the present invention.

[Explanation of symbols]

 10 Main Body 11 Lens Board 25 Film Unit 26,39 Discharge Port 30,40 Discharge Port Cover 31 Deployment Roller 32 Cover Main Body 34 Mounting Axis 35 Mounting Bracket 36 Torsion Spring

Claims (1)

[Claims] 1. An instant camera for developing a developing solution while discharging an exposed instant film unit from a discharge port of a camera body by rotating a developing roller, and a discharge port cover for covering the discharge port and the discharge port. The hinge part is attached to the camera body so that the cover can be opened and closed, and the biasing means biases the discharge port cover in a closing direction so as to be in close contact with the camera body. An instant camera characterized in that it has a biasing force that pushes and opens.