JPH08201987A - Film unit with lens - Google Patents

Abstract

PURPOSE: To surely close a cover member in the case of taking out a photographic film cartridge from a film unit with a lens. CONSTITUTION: The cover member 14 is provided in the film path 16 of the photographic film cartridge 10. An operation shaft 20 is coupled with the key hole 15 of the cover member 14. A check piece 27 is provided on the operation shaft 20. The tip of the check piece 27 is locked on the tooth 23a of a winding knob 23 so as to prevent the rotation in a reverse direction to the winding direction of the knob 23. When the knob 23 is rotated in the reverse direction by strong force exceeding such prevention, the check piece 27 is deformed. By this deformation, the operation shaft 20 is rotated in the closing direction of the cover member 14. Then, the cover member 14 is closed by operating the knob 23 so that the check piece 27 is allowed to act.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens-fitted film unit for loading a photographic film cartridge having a lid member for opening and closing a film passage.

[0002]

2. Description of the Related Art The applicant of the present invention manufactures and sells a film unit with a lens, which is equipped with a simple photographing mechanism such as a photographing lens, a shutter mechanism, and a film winding mechanism, and is preliminarily loaded with a photograph film cartridge. This lens-fitted photo film unit is made up of plastic parts for most of its components so that you can easily purchase and enjoy photography.
Its manufacturing cost is low. Further, a photographic film patrone has conventionally used a metal plate for the patrone, but a large number of plastic ones that are easy to recycle have been proposed in view of environmental problems such as cost and resource saving. As such a photographic film cartridge, the cartridge is made of plastic and is made of plastic that is rotatable between an open position for opening the film passage and a closed position for blocking the film passage to shield the film passage. There is one that incorporates the lid member.

There are also many proposals for using such a plastic photographic film cartridge in a lens-fitted film unit to further improve the recycling suitability of the lens-fitted film unit. Among such proposals, in the lens-fitted film unit described in Japanese Patent Laid-Open No. 6-130558, a lock member that is also engaged with the lid member of the cartridge is provided on the bottom lid that is opened when the cartridge is taken out. When the bottom lid is locked, the lid member is in the open position, and when the lock member is released, the lid member is rotated to the closed position. Thus, the lid member is always in the closed position when the photographic film cartridge is taken out, so that the fog due to light leakage does not occur on the photographic film.

[0004]

However, if the bottom cover is provided with a lock member that also rotates the cover member, the thickness of the bottom cover increases, and the lens-fitted film unit becomes large in the height direction. There is. Further, since the work of releasing the lock member is increased when opening the bottom lid, there is a problem that when performing a large amount of development processing of the lens-fitted photo film unit, bothersomeness and work efficiency are deteriorated. is there.

From the viewpoint of effective use of resources, a used lens-fitted film unit is reused without being discarded. However, simply refilling only the photographic film or the cartridge will not only prevent the desired performance from being deteriorated when the photographing mechanism is deteriorated, but also may cause scratches or the like on the photographic film. is there. Therefore, it is desired to reuse the equipment in equipment having an inspection device for reuse. Therefore, it is necessary to prevent careless refilling of the film. Although various kinds of careless refill preventing means have been proposed, they may be destroyed so that they cannot be reused, or the number of parts and the number of assembling steps may increase.

The present invention is intended to solve the above problems,
An object of the present invention is to provide a lens-fitted photo film unit capable of closing the lid member of a photographic film cartridge by a simple operation without increasing the size. Another object is to prevent careless refilling with a simple configuration.

[0007]

In order to achieve the above object, the lens-fitted film unit according to claim 1 is integrally formed with a tooth formed on a winding knob and an axial end portion of the lid member so as to be integrated with the lid member. The operating shaft that rotates in the direction of the winding shaft and the direction that intersects the axis of the operating shaft are extended, and the tip of the operating shaft comes into contact with the teeth of the winding knob to rotate the winding knob in the direction opposite to the film winding direction. When the winding knob is rotated in the reverse direction with a strong force exceeding this block, it is deformed, and the rotation causes the operation shaft to rotate in the closing direction of the lid member.

In the lens-fitted film unit according to a second aspect of the present invention, the teeth formed on the winding knob, the operating shaft that is linked to the shaft end of the lid member and rotates integrally with the lid member, and the operating shaft of the operating shaft. A non-return mechanism that extends in a direction that intersects the axis, the tip of which comes into contact with the teeth of the winding knob, and the operating knob rotates in the direction opposite to the film winding direction to rotate the operating shaft in the closing direction of the lid member. Member and operation for preventing rotation of the operating shaft in the closing direction of the lid member by the check member, and permitting rotation of the operating shaft when the winding knob is rotated in the opposite direction by a strong force exceeding the blocking. And a shaft rotation control means.

Further, the lens-fitted film unit according to a third aspect of the invention plastically deforms or breaks the check member when rotating in the reverse direction.

[0010]

After taking a picture, as is well known, the unexposed photographic film is set at the photographic opening by rotating the winding knob. In addition, shutter charging is performed by the winding operation of the film. During the film winding operation, the reverse rotation member prevents the winding knob from rotating in the reverse direction. After the photographing is finished, the cartridge is taken out from the photographed lens-fitted film unit at a developing place or the like. Before taking out the cartridge, the winding knob is rotated in the direction opposite to the winding direction. The wind-up knob is prevented from rotating in the reverse direction by the check member. However, when the wind-up knob is strongly rotated in the reverse direction against this block, the check member is deformed and the operating shaft is rotated in the closing direction of the lid member. . As a result, the lid member is set to the closed position. After this, the bottom lid is opened and the photographic film cartridge is taken out.

Further, when the operation shaft rotation control means using the locking claw or the like is used, the rotation in the opposite direction is restricted by the locking claw or the like in a normal film winding operation. When the photo film cartridge is taken out after the shooting is completed, if it is rotated in the opposite direction by a strong force exceeding the rotation regulation, the locking claws are released and the operating shaft rotates in the closing direction of the lid member. To do. As a result, the lid member is set to the closed position.

The check member is plastically deformed or broken by setting the lid member in the closed position. Therefore, when only the photographic film or the cartridge is refilled as it is, the check member does not engage with the winding knob, the closing operation of the lid member cannot be performed, and the ordinary film winding operation cannot be performed. As a result, careless refilling of the film or the like is prevented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 2 showing a unit main body of a lens-fitted film unit according to the present invention and a part of a photographic film cartridge used by loading it, the unit main body 2 is a resin-molded main body as is well known. It is composed of a base and a front cover and a rear cover which are placed on the front and back of the base. Further, a shutter mechanism including shutter blades, a film winding mechanism, and a strobe unit are incorporated in the main body base. The front cover covers the shutter mechanism and the like assembled to the base of the main body, and the rear cover covers the back side of the main body in a light-tight manner.

The unit body 2 is covered with a paper-made protective cover 3 which also serves as a decoration. A perforation (not shown) is formed on the protective cover 3, and the protective cover 3 is formed along the perforation when taking out the photographed patrone.
Is broken and the bottom lid 5 is opened. The bottom lid 5 is
The cartridge storage portion 6 provided in the unit body 2 is light-tightly closed, and is attached to the rear cover of the unit body 2 via a hinge portion 7. Although the bottom lid 5 is formed with light-shielding ribs, locking claws, etc., these are not shown for the sake of simplicity.

When the bottom cover 5 is opened, the bottom cover opening fitting 8 is used. The bottom lid opening metal fitting 8 is a U-shaped bottom plate holding portion 8a.
It has. The tip of the bottom plate holding portion 8a is formed in a wedge shape, and this is inserted into the gap between the bottom lid 5 and the unit body 2. After this insertion, the bottom lid opening fitting 8 is operated in the opening direction of the bottom lid 5 to open the bottom lid 5. Instead of using the bottom lid opening metal fitting 8 as described above, the bottom lid 5 may be opened by using a screwdriver or the like.

As shown in FIGS. 1 and 3, the film cartridge 10 includes cases 11a, 1 made of a resin molded product.
1b and a photo film 12 rotatably housed therein
The main component is a spool 13 around which is wound and a lid member 14 that shields the inside of the film cartridge 10, and a lock device, a display device, a bar code plate 17 and the like for the lid member (not shown) are provided. ing. The film cartridge 10 is constructed such that the spool 13 is rotated in the feeding direction of the film 12 so that the leading end of the photographic film 12 comes out of the film passage 16 of the film cartridge 10.

The lock device is engaged with an engaging notch 15a of a key hole 15 formed at the upper shaft end of the lid member 14,
The lid member 14 is held in the closed position. In addition, the display device,
The state of use of the photographic film such as unused, photographed, and developed is displayed on the display window 18a (see FIG. 2). As shown in FIG. 1, the bar code plate 17 is configured by recording bar codes such as the number of photographed film 12 and film type on a disk so that the bar code can be seen from the window 18b of the case 11a. There is.

The lid member 14 is rotatably incorporated in a film passage 16 formed at the joint between the cases 11a and 11b, and the lid member 14 is pivoted from the outside of the film cartridge 10 at the shaft end. A key hole 15 is formed in order to allow it. The key hole 15 is used for the cases 11a and 11b.
Are exposed to the outside through the shaft holes 11c at both ends. When the operation shaft 20 is fitted into the key hole 15 and rotated, the cover member 14 opens the film passage 16 as shown in FIG. 3 and opens the film passage 16 as shown in FIG. Displaces between a tightly closed closed position. The rotation angle between the open position and the closed position is about 7
It is set to 0 °.

As shown in FIG. 1, the upper plate 6a of the cartridge storage portion 6 is provided with a winding knob mounting boss 21 and an operating shaft mounting hole 22. Winding knob mounting boss 21
A winding knob 23 is rotatably attached to the film, and an engaging shaft 23a of the winding knob 23 is attached to the film cartridge 10.
It is adapted to fit in the spool engaging portion 13a.

The operating shaft 20 is rotatably mounted in the operating shaft mounting hole 22. A key 26 is integrally formed on the operation shaft 20, and the key 26 is formed in the key hole 1 of the lid member 14.
The engagement notch 15a of No. 5 is fitted. A check piece 27 is integrally formed on the operation shaft 20. The check piece 27 is provided so as to project from the upper end portion thereof in a direction intersecting the axis of the operation shaft 20.

As shown in FIG. 5, the tip of the non-return piece 27 is locked to the tooth 23b of the winding knob 23 to prevent the rotation in the direction (arrow B) opposite to the winding direction (arrow A). are doing. Further, a constricted portion 29 is formed near the end of the check piece 27 on the operation shaft 20 side. The constricted portion 29 facilitates bending of the check piece 27, and facilitates forced rotation in the direction of arrow B. Constriction 29
Is provided by forming a semicircular cutout 29a, but this may be a wedge cutout or the like.

The constricted portion 29 is located slightly eccentric to the straight line L1 connecting the axis of the operating shaft 20 and the tip of the check piece 27, whereby the check piece 27 is formed.
It is slightly bent into a foil shape. Due to this bending, when the film is normally wound, if the winding knob 23 is rotated in the B direction opposite to the film winding, this rotational force is rotated counterclockwise by the operation shaft 20 via the check piece 27. Act on. In this state, the lid member 14 is in the open position, and above that, the lid member 14 is in the open position.
Cannot rotate because there is a photographic film in the rotation range. This prevents the winding knob 23 from rotating in the B direction. Further, when the lid member 14 is closed, there is no film in the film passage 16, and when the winding knob 23 is rotated with a strong force in the B direction in this state, the check piece 27 bends and the two-dot chain line in FIG. It deforms as shown by D2 to D5. In the state shown by the two-dot chain line D5, the lid member 1
4 is securely closed, as shown in FIG.

It should be noted that the constricted portion 29 is formed in a direction opposite to the above case so as to be slightly eccentric to a straight line L1 connecting the axis of the operating shaft 20 and the tip of the check piece 27. The check piece may be formed by slightly bending it into a letter shape. In this case, when attempting to rotate the winding knob in the B direction, the rotational force acts on the operation shaft in the clockwise direction via the check piece at the initial stage of rotation. In this state, the lid member 14 is in the open position, and further rotation is blocked by the structure of the cartridge, so the rotation of the winding knob in the B direction is restricted. Further, when closing the lid member 14, when the winding knob is rotated in the B direction with a strong force, the check piece is bent and deformed as shown by a chain double-dashed line D1 in FIG. The direction of action on 20 is switched from the clockwise direction to the counterclockwise direction, and the operation shaft 20 is rotated in the counterclockwise direction. Hereinafter, the lid member 14 can be surely closed in the same manner by displacing as shown by the two-dot chain lines D2 to D5.

The operating shaft 20 and the check piece 27 are integrally molded of synthetic resin to reduce the cost. As synthetic resin, ABS, PP, POM, PMMA, PC,
Engineering plastics such as PA and liquid crystal polymer are used to secure spring properties.

When the operating shaft 20 and the check piece 27 are attached to the upper plate 6a, the operating shaft 20 is set to the position where the lid member 14 is set to the open position. Therefore, the operation shaft 20 and the check piece 27 are first attached to the unit body 2,
After this, when the unused photo film cartridge 10 is loaded into the cartridge storage unit 6, it becomes a work in a dark room, and the cartridge 10 is loaded into the cartridge storage unit 6 with the lid member 14 set to the open position. It Thereby, the key hole 15 of the lid member 14 and the key 36 of the operation shaft 35.
And are coincident with each other and they are connected so as to rotate integrally.

Next, the operation of this embodiment will be described. As shown in FIG. 5, during normal photographing, the teeth 2 of the winding knob 23 are
The tip of the non-return piece 27 is locked to 3b, whereby the winding knob 23 is prevented from rotating in the B direction, which is opposite to the winding direction A. The lens-fitted photo film unit which has finished photographing is sent to a developing place, and the photographed photo film cartridge 10 is taken out there. Prior to this take-out, the winding knob 23 is rotated with a strong force in the B direction opposite to the winding direction. As a result, the check piece 27 is deformed as shown by the two-dot chain line D2 to D5, and the winding knob 2
The rotational displacement of 3 is transmitted to the operating shaft 20 via the check piece 27. As shown in FIG. 1, since the operating shaft 20 and the lid member 14 are integrally connected via the key 26 and the key hole 15, the lid member 14 rotates in the closing direction, and the lid member 14 is rotated. Set to the closed position. After this, as shown in FIG. 2, the bottom lid 5 is opened using the bottom lid opening metal fitting 8, and the photographic film cartridge 10 is taken out.

The lid member 1 by the reverse rotation of the winding knob 23
Since the check piece 27 is plastically deformed by the closing operation of 4, even if the film is refilled in this state,
Since the check piece 27 does not engage with the teeth 23a of the winding knob 23, not only the normal film winding operation cannot be performed, but also the closing operation of the lid member 14 cannot be performed. Therefore, careless film refilling or the like is prevented.

Next, as shown in FIG. 6, another embodiment using the locking claw 40 as the operation shaft rotation control means will be described. The same components as those in the above embodiment are designated by the same reference numerals. In this embodiment, in addition to integrally providing the check piece 42 on the outer periphery of the upper end portion of the operation shaft 41, a locking groove 41a is formed, and the claw main body 40a of the locking claw 40 is locked in this.
The locking claw 40 is formed in a U shape and is provided with a spring property. As a result, the claw body 40a is urged to enter the locking groove 41a.

The locking claw 40 does not disengage from the locking groove 41a in a normal film winding operation, and the rotation of the operating shaft 41 is prevented. Further, by forcibly rotating in the direction B opposite to the film winding direction by a force exceeding the normal operating force, the claw body 40a of the locking claw 40 is disengaged from the locking groove 41a, and the outer peripheral edge of the operation shaft 41 is removed. Riding and unlocking. Then, the check piece 42 is deformed as shown by two-dot chain lines E1 to E3 in the figure, and the operation shaft 41 is rotated counterclockwise. As a result, the lid member 14 that rotates integrally with the operation shaft 41
Is rotated in the closing direction, and the lid member 14 becomes
It is set to the closed position indicated by.

After this operation is performed, the check piece 42 is plastically deformed at the constricted portion 43, so that the check piece 42 cannot be reused and the careless refilling of the film is prevented. Note that instead of plastic deformation, the check piece 42 may be broken by the concentration of bending stress, whereby the check piece 4 is broken.
2 becomes unusable, and careless refilling of the film cartridge 10 is prevented. Further, in addition to the notch 43a for forming the constricted portion 43, a hole, a concave portion or the like may be formed to concentrate the bending stress.

Further, in the above-described embodiment, as shown in FIGS. 5 and 6, notches 29a and 43a are formed near the operation shaft side ends of the check pieces 27 and 42 to form the constricted portions 29 and 43. Although the degree of freedom of rotation of the operation shafts 20 and 41 is ensured by this, the constricted portions 29 and 43 may be omitted when the operation shafts 20 and 41 can be easily rotated. Further, as shown in FIG. 7, the non-return piece 51 formed integrally with the operation shaft 50 may be curved in advance so as to give a trigger for the deflection. Further, as shown in FIG. 8, the non-return piece 53 may be formed so as to become thinner toward the central portion so that the non-return piece 53 can be easily bent. Further, as shown in FIG. 9, a U-shaped spring portion 58 may be formed in the central portion of the check piece 57.

Further, in the above embodiment, the winding knob 23
Although the check pieces 27 and the like are brought into contact with the teeth 23a formed on the outer periphery of the, the teeth may be formed so as to project to the lower surface side of the winding knob.

[0033]

According to the present invention, the operation shaft which is linked to the shaft end portion of the lid member and rotates integrally with the lid member, and the check member extending in the direction intersecting the axis of the operation shaft. The check member is provided to prevent rotation in a direction opposite to the film winding direction by the rotation operation of the winding knob during film winding, and the reverse operation is performed with a stronger force than this rotation operation. When it rotates in the direction, it is deformed and the operation shaft is configured to rotate in the closing direction of the lid member by this rotation. Therefore, set the lid member to the closed position using the check member of the winding knob. You can Moreover, since the check member is used, the number of parts is not increased. Further, since the parts are arranged at the height of the winding knob, the space can be saved, and the lens-fitted film unit can be made compact.

Further, when the winding knob is rotated during film winding, rotation in a direction opposite to the film winding direction is prevented, and when the film is rotated in the opposite direction with a stronger force than this rotating operation. Is provided with operation shaft rotation control means for allowing the rotation of the operation shaft and rotating the operation shaft in the closing direction of the lid member by this rotation operation. In the same manner, the check member is used to close the lid member. You will be able to set the position.

Further, by plastically deforming or breaking the non-return member at the time of rotating in the reverse direction, it becomes impossible to reuse it, and careless refilling of the film can be prevented.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of a lens-fitted film unit embodying the present invention.

FIG. 2 is a perspective view showing a state in which a bottom lid of the lens-fitted film unit is opened.

FIG. 3 is a cross-sectional view showing the photographic film cartridge with the lid member in the open position.

FIG. 4 is a cross-sectional view of an essential part showing the film passage when the lid member is in the closed position.

FIG. 5 is a plan view showing movements of an operation shaft and a check piece.

FIG. 6 is a plan view showing an operating shaft, a check piece, and a locking claw in another embodiment.

FIG. 7 is a plan view showing a check piece according to another embodiment.

FIG. 8 is a plan view showing a check piece according to another embodiment.

FIG. 9 is a plan view showing a check piece according to another embodiment.

[Explanation of symbols]

 2 unit body 5 bottom lid 6 cartridge storage part 10 photo film cartridge 14 lid member 15 key hole 16 film passage 20 operation shaft 23 winding knob 23a teeth 27, 42, 51, 53, 57 check piece 29, 43 constriction part

Claims (3)

[Claims] 1. A photographic film cartridge having a lid member rotatable between a closed position for shutting off a film passage and an open position for opening the film passage, and the photographed film is stored in the photographic film cartridge by rotating a winding knob. In a lens-fitted film unit that is wound up into a roll, a tooth formed on the winding knob, an operation shaft that is linked to a shaft end portion of the lid member and rotates integrally with the lid member, and an axis of the operation shaft. It extends in a direction intersecting with, and its tip comes into contact with the teeth of the winding knob to prevent the winding knob from rotating in the direction opposite to the film winding direction. And a non-return member for rotating the operation shaft in the closing direction of the lid member by the deformation when rotating in the direction. 2. A photographic film cartridge having a lid member rotatable between a closed position for shutting off the film passage and an open position for opening the film passage, and the film photographed by rotating a winding knob is stored in the photographic film cartridge. In a lens-fitted film unit that is wound up into a roll, a tooth formed on the winding knob, an operation shaft that is linked to a shaft end portion of the lid member and rotates integrally with the lid member, and an axis of the operation shaft. A non-return member that extends in a direction intersecting with, and has a tip abutting against the teeth of the winding knob, and that rotates the operating shaft in a direction opposite to the film winding direction to rotate the operation shaft in the closing direction of the lid member. , The rotation of the operating shaft in the closing direction of the lid member by the check member is prevented, and when the winding knob is rotated in the reverse direction by a strong force exceeding this blocking, the rotation of the operating shaft is prevented. Film unit, characterized in that an operating shaft rotation control means for volume. 3. The lens-fitted photo film unit according to claim 1 or 2, wherein the non-return member plastically deforms or breaks during rotation in the opposite direction.