JPH08201990A - 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: A notch 20 is provided on the photographic film cartridge 10. A pressing pin 21 is provided at a position faced to the notch 20. A pressing block 24 is provided in the insertion path of a bottom cover opening fitting 8. By projecting the pin 21 and the notch 20 to the pressing block 24, the cover member 14 is rotated in a closing direction. An operation shaft 35 is coupled with the key hole 15 of the cover member 14. A leaf spring 37 is provided on the operation shaft 35. Repulsive force is accumulated in the leaf spring 37 as the cover member 14 is pressed to be rotated by the pin 21. The cover member 14 is rotated to a closing position by the repulsive force of the spring 37 when the rotation of the cover member 14 by the pin 21 is finished. The cover member 14 is surely closed by the repulsive force of the spring 37.

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 photo 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 on the photo film. . Therefore,
It is desired to reuse the equipment in a facility having an inspection device for reuse of the parts. 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 ensure that the lid member of the photographic film cartridge is closed when the bottom lid is opened without increasing the size of the lens-fitted film unit and increasing the number of working steps. 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 linked to an initial rotating member for rotating the lid member in the closing direction and an axial end portion of the lid member. , The repulsive force is accumulated by the rotation of the lid member by the initial rotation member, the repulsive force is switched to the closing direction of the lid member during the rotation, and the lid member is rotated in the closing direction by the accumulated repulsive force to the lid member. And a spring member for locking.

The lens-fitted film unit according to a second aspect of the present invention is configured such that the initial rotation member is pushed by the bottom lid opening member when the bottom lid opening member is inserted to rotate the lid member of the cartridge in the closing direction. Is.

In the lens-fitted photo film unit according to a third aspect of the present invention, the spring member is fitted to the shaft end portion of the lid member and extends in a direction intersecting the operation shaft that rotates integrally with the lid member. The free end of the leaf spring is placed on a line that bisects the rotation angle between the open position and the closed position of the lid member, and the end position of the rotation angle of the lid member by the initial rotation member is set. , Is set at a position beyond the bisector.

In the lens-fitted photo film unit according to the present invention, the rotation angle between the closed position and the open position of the lid member is about 70 °, and the rotation angle of the lid member by the initial rotation member is about 40 °. The bisecting line is a line that bisects the rotation angle between the closed position and the open position of the lid member.

In the lens-fitted film unit according to a fifth aspect of the present invention, the spring member is integrally formed of synthetic resin.

The lens-fitted photo film unit according to a sixth aspect of the present invention is such that a constricted portion is provided in the leaf spring portion in the vicinity of the fixed portion.

In the lens-fitted film unit according to a seventh aspect of the present invention, a bending stress concentration portion is formed in the leaf spring portion so that plastic deformation or breakage occurs in the bending stress concentration portion after the lid member is rotated to the closed position. It is the one.

The lens-fitted film unit according to the eighth aspect of the present invention is such that the cartridge has an insertion hole or a notch into which the initial rotation member is inserted.

[0015]

When the cartridge is taken out from the photographed lens-fitted film unit, the bottom lid opening member is inserted between the bottom lid and the cartridge storage portion. By this insertion, the bottom lid opening member pushes the initial rotation member. By this pushing movement, the lid member is rotated in the closing direction. The rotation of the lid member causes the spring member to bend, and the bending causes the repulsive force to be accumulated in the spring member. Then, during the rotation of the lid member by the initial rotation member, the repulsive force is switched to the closing direction of the lid member, and the repulsive force reliably pushes the lid member in the closing direction to set the lid member to the closed position. It When a bending stress concentration portion is formed in the leaf spring of the spring member by a notch or the like, the spring member is plastically deformed or destroyed at the stress concentration portion after the lid member is set to the closed position. Therefore, when the cartridge is taken out, the spring member cannot be reused, and careless film refilling is prevented. Similarly, by forming an insertion hole or a notch of the initial rotation member in the cartridge, it is possible to distinguish it from a commercially available cartridge. These commercially available patrones do not have cutouts or insertion holes into which the initial rotation member is inserted, and the closing operation of the lid member by the spring member cannot be obtained, so that careless refilling of the patrone is prevented.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 2 showing a part of a unit main body of a lens-fitted film unit according to the present invention, the unit main body 2 is a resin-molded main body base, as is well known, and a front surface and a rear surface thereof. The main body includes a shutter mechanism including shutter blades, a film winding mechanism, a strobe unit, and the like. 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 protective cover 3 which also serves as a decoration. Perforations 4 are formed in the protective cover 3, and when taking out the photographed patrone, the protective cover 3 is torn along the perforations 4 and the bottom lid 5 is opened as shown in FIG. .
The bottom lid 5 optically closes the cartridge storage portion 6 provided in the unit body 2, and is attached to the rear cover of the unit body 2 via the hinge portion 7. The bottom lid 5
Light-shielding ribs, locking claws, and the like are formed on the substrate, but these are not shown for the sake of simplicity of the drawing.

When the bottom lid 5 is opened, the bottom lid 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.

As shown in FIGS. 1 and 4, 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 use state of the photographic film such as unused, photographed, and developed is displayed on the display window 18a (see FIG. 3). 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 35 is fitted into the key hole 15 and rotated, the lid member 14 opens the film passage 16 as shown in FIG. 4 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, a film cartridge 1
A notch 20 is formed in the vicinity of the 0 film passage 16 at a position where the light shielding property of the film cartridge 10 is maintained. The notch 20 is formed in the lid member 1 in the film passage 16.
Part 4 is exposed to the outside. By pressing the portion of the lid member 14 exposed from the notch 20 with the pressing pin 21, the lid member 14 rotates in the closing direction.

As shown in FIG. 4, the pressing pin 21 is axially movably mounted by a mounting boss 22 at a position facing the notch 20, and the tip end of the pressing pin 21 of the lid member 14 is inside the notch 20. It is located in the vicinity. Then, it is configured to be displaced between a protruding position where it projects and rotates the lid member 14 in the closing direction, and a position away from the lid member 14. The pressing pin 21 is urged by the coil spring 23 in a direction of retracting from the notch 20. A pressing bracket 24 is fixed to one end of the pressing pin 21. If the tip of the pressing pin 21 is positioned inside the notch 20, the interference between the pressing pin 21 and the notch 20 becomes a problem when the cartridge 10 is taken in and out of the cartridge storage section 6. However, the tip of the pressing pin 21 is made of an elastic material that is easily deformed so that the tip of the pressing pin 21 is retracted from the notch 20 when the cartridge 10 is taken in and out. In order to smoothly retract the tip, the interference surface of the notch 20 with the pressing pin is formed as an inclined surface, and the notch 2 of the pressing pin 21 is formed.
It is advisable to smoothly save from 0. Further, the pressing pin 21 may be forcibly retracted from the notch 20 when the cartridge 10 is taken in and out. Further, although there is a drawback that the stroke of the pressing pin 21 becomes large, the pressing pin 21 is displaced between a position retracted from the notch 20 and a position where the pressing pin 21 enters the notch 20 and rotates the lid member 14. The interference between the pressing pin 21 and the notch 20 may be avoided.

As shown in FIG. 1, the pressing bracket 24 is formed in a crank shape, and the engaging piece 24a thereof is located at the entry path of the tip of the bottom plate holding portion 8a of the bottom lid opening metal fitting 8. . When the tip of the bottom plate holding portion 8a is inserted, the pressing bracket 24 is pushed by this insertion. As a result, the tip of the pressing pin 21 pushes the lid member 14, and the lid member 14 is rotated about 40 ° in the closing direction.

A winding knob mounting boss 30, an operating shaft mounting hole 31, and a leaf spring mounting shaft 32 are provided on the upper plate 6a of the cartridge storage section 6. Winding knob mounting boss 30
A winding knob 33 is rotatably attached to the film, and an engaging shaft 33a of the winding knob 33 is attached to the film cartridge 10.
It is adapted to fit in the spool engaging portion 13a.

An operation shaft 35 is rotatably attached to the operation shaft attachment hole 31. The operation shaft 35 is integrally formed with a key 36. The key 36 is a key hole 1 of the lid member 14.
It fits in 5. The leaf spring 3 is attached to the operation shaft 35.
7 is integrally formed. The leaf spring 37 is the operation shaft 35.
It is provided so as to project from its upper end portion in a direction intersecting with, and is curved in advance in order to specify the bending direction.

A mounting ring 38 is attached to the free end of the leaf spring 37.
Is formed, and the mounting ring 38 is the leaf spring mounting shaft 32.
Attached to. A constricted portion 39 is formed near the end of the leaf spring 37 on the side of the operation shaft 35. The constricted portion 39 facilitates bending of the leaf spring 37 by the rotational displacement of the operation shaft 35. As shown in FIG. 6, the constricted portion 39 is provided by forming a semicircular cutout 39a, but this may be a wedge cutout or the like.

The operating shaft 35 and the leaf spring 37 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 35 and the leaf spring 37 are attached to the upper plate 6a, the operating shaft 35 is set to the position where the lid member 14 is set to the open position. Therefore, when the unused photo film cartridge 10 is loaded into the cartridge storage section 6, it is a work in a dark room, and the cartridge 10 is loaded into the cartridge storage section 6 with the lid member 14 set to the open position. It Thereby, the lid member 14
The key hole 15 and the key 36 of the operation shaft 35 are aligned with each other and are connected so as to rotate integrally. Instead of such a loading operation of the cartridge 10 in the dark room, the cartridge 10 may be loaded in the cartridge storage unit 6 in the bright room. In this case, after loading the cartridge 10 in the cartridge storage portion 6 and closing the bottom lid 5 to store the cartridge 10 in a light-tight manner, the operation shaft 35 and the leaf spring 37 are attached to the upper plate 6a, and the lid member 14 To the open position.

Next, the operation of this embodiment will be described. As shown in FIG. 2 and FIG. 3, when taking out the film cartridge 10 from the film-equipped film unit having been photographed,
The bottom lid 5 is opened using the bottom lid opening metal fitting 8. As shown in FIG. 1, when the tip of the bottom plate holding portion 8 a of the opening fitting 8 is inserted into the unit main body 2, the tip is pressed.
4 and hits the pressing pin 21 with the lid member 14
Push to the side.

FIG. 7 shows the pressing pin 21 by inserting the opening fitting.
Shows that it is completely pushed in. Reference numeral C1 indicates the center line of the end of the leaf spring 37 on the mounting side when the lid member 14 is in the open position, and C2 is the center line of the end of the leaf spring 37 on the mounting side when the lid member 14 is in the closed position. Is shown. The angle formed by these center lines C1 and C2 is about 70 °, which is the rotation angle of the lid member 14. Further, C3 is a center line that bisects the rotation angle of the lid member 14. Push pin 2
When 1 is completely pushed in, the lid member 14 rotates about 40 ° in the closing direction from the center line C1 of the open position. During this rotation, the leaf spring 37 bends and the repulsive force is accumulated.
The repulsive force exceeds 35 ° when the lid member 14 rotates (the leaf spring 3
When the center line of the end portion of the mounting side of 7 exceeds C3), the action direction is switched from the clockwise direction to the counterclockwise direction. Therefore, when the lid member 14 rotates 40 ° in the closing direction, the repulsive force of the leaf spring 37 causes The lid member 14 is biased in the closing direction indicated by the arrow A1. As a result, as shown in FIG. 8, the lid member 14 is instantly and surely rotated to the closed position. In this closed position, the tip end of the lock lever (not shown) is locked in the engagement notch 15a of the key hole 15 to lock the lid member 14 in the closed position. In this way, when the operation of opening the bottom cover 5 is performed, the film passage 16 of the film cartridge 10 is closed in conjunction with this operation, and the photo film 12 that has been photographed does not suffer from fog due to light leakage.

FIG. 9 shows how the lid member 14 and the leaf spring 37 work together. In the state shown in FIG. 9A, the lid member 14 is in the open position, and the lens-fitted film unit can take a picture. FIG. 9B shows a state immediately after the tip of the opening metal fitting 8 is inserted into the unit main body 2 for opening the bottom lid. In this state, the lid member 14 is pressed by the pressing pin 21.
Is rotated by about 40 ° in the closing direction. Note that this state shows a moment during the closing operation of the lid member 14, and the lid member 14 is not stopped in this state. Figure 9
In the state of (B), since the action direction of the repulsive force of the leaf spring 37 is switched to the direction of closing the lid member 14, the repulsive force of the leaf spring 37 causes the lid member 14 to instantaneously reach the closed position shown in FIG. 9 (C). Is rotated. At this closed position, a lock lever (not shown) is locked in the key hole 15 of the lid member 14, so that the cartridge storage portion 6 is securely closed.
The film cartridge 10 is taken out from.

Next, an embodiment will be described in which the film cartridge is prevented from being unintentionally refilled. In this case, as shown in FIG. 10 (A), the notch 50a
A leaf spring 51 having a bending stress concentrating portion 50 is provided and is used instead of the leaf spring 37 in the above-described embodiment. In FIG. 10, the same components as those in the above embodiment are designated by the same reference numerals, and the description thereof will be omitted. As shown in FIG. 10B, when the bottom lid 5 is opened, the pressing pin 21 is pushed and the lid member 14 rotates. The repulsive force accumulated in the leaf spring 51 by this rotation switches the biasing direction to the closing direction of the lid member 14 in the state of FIG. Due to this repulsive force, the lid member 14 is reliably rotated to the closed position as shown in FIG. Thereafter, as shown in FIG. 10D, bending stress is concentrated on the notch 50a, and as a result, the leaf spring 51 is broken at this portion. In addition, instead of breaking,
The leaf spring 51 may be plastically deformed, which makes it impossible to reuse the leaf spring 51 and prevents the film cartridge from being inadvertently refilled. Further, in addition to the notch 50a, holes or recesses may be formed to concentrate the bending stress.

Further, as shown in FIG. 1, the film cartridge 10 has a notch 20 for inserting a pressing pin 21.
Since the film is formed, it can be clearly specified as a cartridge dedicated to the lens-fitted film unit with respect to a commercially available cartridge. Therefore, by supplying such a dedicated cartridge only to one having a recycling facility equipped with an inspection device or the like, inadvertent film refilling can be more effectively prevented. Note that an insertion hole for the pressing pin 21 may be formed instead of the notch 20.

Further, in the above embodiment, as shown in FIG. 6, a notch 39a is formed near the end of the leaf spring 37 on the side of the operating shaft to provide a constricted portion 39, which allows the operating shaft 35 to rotate freely. Although the degree is secured, it may be omitted depending on the shape of the leaf spring. Further, the leaf spring 37 is bent in advance to give a trigger for the bending, but instead of bending, the leaf spring 55 is formed in a linear shape as shown in FIG. 11, and the cartridge storage portion 6 is formed. When attached to the upper plate 6a, it may be curved as shown in FIG. Further, as shown in FIG. 12, a thin central leaf spring 56 is formed so that its cross-sectional area becomes smaller as it approaches the central portion.
May be used. Further, as shown in FIG.
You may form the U-shaped spring part 58 in the center part of 7.

In the above-mentioned embodiment, the pressing pin 21 which is pushed in interlock with the bottom cover opening fitting 8 is used as the initial rotating member, but in addition to this, although not shown in the drawings, the cover member 14 is constituted by a swing lever or a slider. May be rotated to accumulate the repulsive force in the spring member. Further, instead of rotating the cover member 14, the cover member 14 may be rotated by rotating the operation shaft 35 with a pressing pin, a swing lever, a slider, or the like. Further, without interlocking with the insertion of the bottom lid opening metal fitting 8, the initial rotation member, for example, a part of the pressing pin 21 is exposed to the outside from the unit main body, and the lid member 14 is rotated by directly operating this. You may let me.

In the above embodiment, the operating shaft 35 and the leaf spring 37 are integrally molded using synthetic resin, but a metal leaf spring may be used instead. Further, instead of the leaf spring 37, a torsion spring or a toggle spring may be used. In this case, the repulsive force is accumulated by the rotation of the operation shaft 35, and the urging direction by the repulsive force is switched to the closing direction during the rotation.

In the above embodiment, the bottom lid 5 is opened by using the dedicated bottom lid opening metal fitting 8, but in addition to this, the bottom lid 5 is opened by using a tool such as a screwdriver whose tip is flat. You may pry open. In this case, the tool is inserted into the unit body, the pressing bracket 24 is pushed in, and then the bottom lid 5 is pry open.

[0039]

According to the present invention, an initial rotation member for rotating the lid member in the closing direction halfway and a spring member linked to the shaft end of the lid member are provided, and the lid member is rotated by the initial rotation member. The repulsive force is accumulated in the spring member by means of the repulsive force, and the lid member is rotated in the closing direction by the repulsive force during this rotation, so that the lid member can be reliably set to the closed position when the film cartridge is taken out from the film unit. . Therefore, the film passage of the photographic film cartridge is light-tightly closed, and external light does not enter the photographic film cartridge even when the bottom cover is opened. As a result, the film cartridge having the lid member that is displaced between the closed position and the open position can be used in the lens-equipped film unit. Moreover, the lid member can be surely closed with a small number of initial rotating members and spring members.

Further, since the initial rotation member is pushed by this member when the bottom lid opening member is inserted to rotate the lid member in the closing direction, the lid member can be reliably closed by interlocking with the opening of the bottom lid. . In addition, a spring member is formed of an operating shaft that fits into the shaft end of the lid member and rotates integrally with the lid member, and a leaf spring that extends in a direction intersecting with the operating shaft. Since it is integrally molded with, the manufacturing cost can be reduced. In addition, since most of the members can be made of synthetic resin, the amount of metal materials and the like is reduced and the suitability for disposal is improved. Further, since the biasing direction of the spring member is switched to the closing direction of the lid member at the rotation end position of the lid member by the initial rotation member, the lid member can be reliably set to the closing position after the rotation by the predetermined rotation member.

Further, since a bending stress concentration portion is formed in the leaf spring and plastic deformation or breakage occurs in the bending stress concentration portion after the lid member is rotated to the closed position, when the film cartridge is taken out, the spring member is It cannot be reused. As a result, careless film refilling can be prevented.

Since the film cartridge has an insertion hole or a notch into which the initial rotating member is inserted, it can be clearly distinguished from a commercially available film cartridge, and a commercially available film cartridge cannot be used. It is possible to prevent easy refilling.

[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 of a main part showing an operation of taking out a photographic film cartridge from a film unit with a lens.

FIG. 3 is a perspective view showing a state in which a bottom lid of the lens-fitted film unit is opened.

FIG. 4 is a sectional view showing a photographic film cartridge and a pressing pin.

FIG. 5 is a cross-sectional view of an essential part showing the film passage when the lid member is in the closed position.

FIG. 6 is a plan view showing an upper plate of a film accommodating portion to which a leaf spring is attached.

FIG. 7 is a plan view showing a state in which the lid member is pushed by a push pin and rotated.

FIG. 8 is a plan view showing a state where the lid member is in the closed position by the repulsive force of the leaf spring.

FIG. 9 is a perspective view of essential parts showing the movement of the leaf spring and the lid member.

FIG. 10 is a plan view showing a leaf spring and its movement in another embodiment.

FIG. 11 is a plan view showing a leaf spring according to another embodiment.

FIG. 12 is a plan view showing a leaf spring according to another embodiment.

FIG. 13 is a plan view showing a leaf spring in another embodiment.

[Explanation of symbols]

 2 Unit main body 3 Protective cover 5 Bottom lid 6 Patrone storage part 8 Bottom lid opening metal fitting 10 Photo film cartridge 14 Lid member 15 Key hole 16 Film passage 20 Notch 21 Press pin 24 Press bracket 35 Operation shaft 37, 55, 56, 57 Leaf spring 39 Constriction part 50 Bending stress concentration part

Claims (8)

[Claims] 1. A lens-fitted film unit containing a photographic film cartridge having a lid member rotatable between a closed position for blocking a film passage and an open position for opening the film passage, wherein the lid member is rotated in a closing direction. The revolving force is accumulated by the rotation of the lid member by the initial rotating member, which is linked to the initial rotating member and the shaft end portion of the lid member. During the rotation, the repulsive force is switched in the closing direction of the lid member and accumulated. And a spring member for locking the lid member by rotating the lid member in the closing direction by the repulsive force. 2. A cartridge storage unit for storing a cartridge in which a lid member rotatable between a closed position for blocking the film passage and an open position for opening the film passage, and a bottom lid for closing the cartridge storage unit are provided. , A lens-fitted film unit in which a bottom lid opening member is inserted between the bottom lid and the cartridge storage unit to open the bottom lid, and the photographed patrone is taken out. An initial rotation member that is pushed to rotate the lid member of the cartridge in the closing direction is linked to an axial end portion of the lid member, and a repulsive force is accumulated by the rotation of the lid member by the initial rotation member. A repulsive force is switched to a closing direction of the lid member, and a spring member for locking the lid member by rotating the lid member in the closing direction by the accumulated repulsive force is provided. Lens-fitted photo film unit. 3. The lens-fitted film unit according to claim 1 or 2, wherein the spring member intersects with an operating shaft that fits into a shaft end of the lid member and rotates integrally with the lid member. Direction, and the free end of the leaf spring is arranged on a line that bisects the rotation angle between the open position and the closed position of the lid member. A lens-fitted film unit, wherein the end position is set to a position beyond the bisector. 4. The lens-fitted film unit according to claim 3, wherein the rotation angle between the closed position and the open position of the lid member is about 70 °, and the initial rotation angle of the lid member by the initial rotation member is about 40 °. The lens-fitted film unit is characterized in that the bisecting line is a line that bisects the rotation angle between the closing position and the opening position of the lid member. 5. The lens-fitted film unit according to claim 3, wherein the operating shaft and the leaf spring are integrally molded of synthetic resin. 6. The lens-fitted film unit according to claim 5, wherein a constriction portion is provided in a portion near the operation axis of the leaf spring. 7. The lens-fitted film unit according to claim 5, wherein a bending stress concentration portion is formed on the leaf spring, and the bending stress concentration portion is plastically deformed or fractured after the lid member is rotated to the closed position. A film unit with a lens that is generated. 8. The lens-fitted film unit according to claim 1, wherein an insertion hole or a notch into which the initial rotation member is inserted is formed in the cartridge. unit.