JPH08211568A - Film unit with lens - Google Patents

Abstract

PURPOSE: To close a light shielding cover in the case of taking out a cartridge and further to prevent the cartridge from being refilled. CONSTITUTION: In the case of taking out the cartridge 12 from a unit main body, one end 30 of an operating member 26 exposed from the aperture 29 of the front side wall 21a of a cartridge chamber 21 is pulled out to the outside. Then, the other end of the operating member 26 turns a light shielding cover driving member 25, which turns the light shielding cover 24 to a closing position. By strongly pulling the operating member 26 further, the projection of the operating member 26 abuts on the inner surface of the front side wall 21a and a thin part 33 formed on the front side wall 21a is ruptured, so that the front side wall 21a and a back cover 31 are detached from the unit main body.

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 mounting a photographic film cartridge having a light-shielding lid for opening and closing a film outlet.

[0002]

2. Description of the Related Art A film unit with a lens, which incorporates a simple photographing mechanism such as a photographing lens and a shutter mechanism, and a film cartridge and an unexposed photo film drawn from the film cartridge, for example, "Sharun Run 800"
(Trade name) and the like are manufactured and sold by the applicant. This lens-fitted film unit is manufactured at low cost by using each of the above-mentioned mechanisms and each part of the unit main body as resin parts so that users can easily purchase and enjoy photography.
In addition, as such a lens-fitted photo film unit, a large number of photo film photo film cartridges using a plastic photo film cartridge have been proposed. When not in use, the plastic patrone rolls up the photo film all the way to the tip, and when sending the photo film out of the patrone, the spool around which the photo film is wound is rotated, and the spool is rotated. It is designed to be transmitted to the photo film and sent out.

In place of the conventional telemeps, the film outlet for the photographic film to enter and exit is made of plastic which is rotatable between an open position for opening the film outlet and a closed position for shutting off the film outlet. There are some that use a light-shielding lid. Such a light-blocking lid must be securely closed when the cartridge is taken out from the lens-fitted film unit. Therefore, in the invention described in JP-A-6-130558, etc.,
An engaging piece that engages with the end of the light shielding lid is rotatably provided on the bottom lid that is opened when the cartridge is taken out, and the engaging piece is rotated before opening the bottom lid to close the light shielding lid. It is designed to rotate. As a result, when the cartridge is taken out, the light shielding lid is always in the closed position.

Further, a request for simultaneous printing of the lens-fitted film unit is handed over to the development handling shop or the like together with the lens-fitted film unit, and the cartridge is taken out at the developing station for development processing. However, some users may take out a cartridge by themselves and newly load an unused photo film cartridge into the film unit with the lens after taking out the cartridge and reuse it. Such reuse of the lens-fitted film unit makes it difficult to keep the inside of the lens-fitted film unit completely light-tight as it was at the time of manufacture, and there is a risk that the photographic film being photographed may be exposed. If such a lens-fitted film unit is available on the market, it may significantly impair the reliability of the lens-fitted film unit.Therefore, the lens-fitted film unit is a means to prevent refilling of photo film cartridges. Are taken in various ways.

The loading of the photographic film cartridge into the film unit with the lens, various photographing mechanisms are assembled,
A cartridge and a photo film pulled out from the cartridge and rolled into a roll are loaded so as to sandwich the light-shielding cylinder with respect to the main body portion provided with the light-shielding cylinder for exposing the photographic film. . Therefore, the photographic film cartridge cannot be loaded into the main body unless the rear cover that covers the back side of the main body in a light-tight manner is attached. Focusing on this point, in the refill prevention means of the photo film cartridge, when the rear cover is removed from the main body, the main parts integrally formed in the main body are destroyed, and the main body and the rear cover are destroyed. Ultrasonic welding and and forcefully remove the rear cover so that part of the main body is destroyed.

[0006]

However, in a lens-fitted photo film unit using a plastic film cartridge, the photo film is shielded by rotating the spool by loading the photo film with all the photo film inside. Since it is possible to send it out to the other side after passing through the tube, there is a problem that the photographic film cartridge can be refilled without removing the rear cover. Therefore, it is necessary to prevent refilling when removing a used cartridge, instead of destroying the main body by removing the rear cover as in the conventional refill preventing means. It is essential that the light shield lid of the patrone be closed.

The present invention has been made in view of the above problems, and when the photo film cartridge is taken out of the lens-fitted film unit after the photographing is completed, the light-shielding lid is surely rotated to the closed position and the photo film cartridge is rotated. The purpose is to prevent refilling.

[0008]

In order to solve the above-mentioned problems, the lens-fitted film unit according to claim 1 comprises:
An operation member having one end exposed to the outside of the lens-fitted film unit so as to be freely drawn out, the other end engaged with the light-shielding lid driving member, and a protrusion formed in contact with the inner surface of the sidewall of the cartridge chamber is provided in the intermediate portion. By pulling out one end of the member, the light-shielding lid driving member is rotated to the closed position, and thereafter, the sidewall of the cartridge chamber is broken by the projection so that the cartridge can be taken out.

Further, in the film unit with lens according to the second aspect of the present invention, a rack is formed at one end of the operating member, and the rack is meshed with the gear formed on the light-shielding lid driving member.

Further, in the lens-fitted photo film unit according to the present invention, the light-shielding lid driving member is engaged with the end of the light-shielding lid and the engaging piece is biased toward the closing direction of the light-shielding lid. And the other end of the operating member is a holding piece for holding the engaging piece in the open position against the bias of the spring, and the engaging piece by the holding piece when one end of the operating member is pulled out. Is released, and the engaging piece rotates the light shielding lid to the closed position by the bias of the spring.

[0011]

After the photographing on all the photo films and the winding on the patrone are completed, one end of the operating member is pulled out to the outside of the lens-fitted film unit. Then, the rack formed on the other end of the operating member rotates the gear of the light-shielding lid driving member that is meshed with the rack. As a result, the light blocking lid of the cartridge is rotated to the closed position. Further, the projection formed on the operating member breaks the inner surface of the sidewall of the cartridge chamber and exposes the cartridge so that the cartridge can be taken out.

[0012]

FIG. 2 shows the external appearance of a lens-fitted film unit according to the present invention. The lens-fitted film unit 2 is of a type designed to be made thinner, and is composed of a unit main body 3 having a photographing mechanism and the like built therein and a paper box 4 for storing the same. The paper box 4 has a contour that exposes the winding knob 5, the shutter button 6 and the like incorporated in the unit main body 3, and also exposes the taking lens 7, the finder 8 and the shot number display window 9 and the like. Holes etc. are provided.

In FIG. 1 showing the structure of the unit main body 3, the unit main body 3 includes a main body 11 and a main body 11.
A photo film cartridge 14 including a cartridge 12 and a photo film 13 loaded in the main body 11, an exposure unit 15 mounted on the front surface of the main body 11, a rear cover 16 and a front cover assembled on the back and front sides of the main body 11. It is composed of 17 and.

The main body 11 is made of opaque plastic, and a light shielding cylinder 20 is integrally provided on the optical axis 19. An exposure opening 20a is provided on the front surface of the light shielding tube 20.
Is formed, and an aperture that determines the exposure range of the photographic film 13 is formed on the back side. On both sides of the light-shielding cylinder 20, a cartridge chamber 21 for storing the cartridge 12 and a film roll chamber 22 for storing the photographic film 13 in a roll form are formed. The front side wall 21 a of the cartridge chamber 21 has a shape projecting more forward than the front side wall of the film roll chamber 22.

On the upper surface 21b of the cartridge chamber 21, a light shielding lid driving member 25 for rotating a light shielding lid 24 for opening and closing the film outlet of the cartridge 12, and this light shielding lid driving member 25.
Member 26 for rotating the cartridge when the cartridge 12 is taken out
And the key shaft 2 that engages with the spool 27 of the cartridge 12.
A winding knob 5 having a lower portion 8 formed therein is assembled. The front side wall 21a of the cartridge chamber 21 has an upper surface 21
It is projected upward so as to cover the front side of b, and an opening 29 is formed in this protruding portion toward the front side.
One end 30 of the operating member 26 is exposed from the opening 29 to the outside of the unit body 3. Further, a bottom lid 31 that covers the bottom surface in a light-tight manner is integrally formed in the cartridge chamber 21.

On the front side wall 21a of the cartridge chamber 21,
The groove-shaped thin portion 33 is formed so as to surround it. As shown in the cross section of FIG. 3, the thin portion 33 has a thickness that is about half that of the other portions of the cartridge chamber 21.
Then, when the front side wall 21a is strongly pulled toward the front side of the unit main body 3, the thin portion 33 is broken and removed so as to be peeled off from the main body 11 as shown in FIG. At this time, the bottom lid 31 is also removed together with the front side wall 21a.

The rear cover 16 is made of opaque plastic, and a film supporting surface 35 is formed at a portion of the main body 11 facing the aperture. A pull-top type bottom cover 36 that covers the bottom surface of the film roll chamber 22 is provided on the bottom surface side.

The front cover 17 is made of opaque plastic, and has a shutter button 6, a window 9 for displaying the number of shots.
Etc. are formed. The front cover 17 is provided with a notch 38 for exposing the cartridge chamber 21 to the outside of the unit body 3. As a result, the cartridge room 21
The front side wall 21a serves as an outer wall of the unit main body 3 and serves as a grip during photographing. The front cover 17 is assembled to the main body 11 and the rear cover 16 by claw engagement.

The exposure unit 15 has a base portion 40 made of opaque plastic, and a film winding mechanism, a film counter mechanism, a shutter mechanism and the like incorporated therein. Further, the taking lens 7 is incorporated on the front surface side of the base portion 40, and the viewfinder 8 is provided on the upper portion of the base portion 40.
Is built in.

As shown in FIG. 4, the cartridge 12 is a combination of a first case 42 and a second case 43, which are molded from plastic forming the outer shell of the cartridge 12, and the first and second cases 42, 43. A light-blocking lid 24 incorporated in the back of the film delivery port 44 formed in the eye and rotatable between a closed position for shutting off the film delivery port 44 and an open position for opening the film delivery port 44, and a photographic film inside the film cartridge 12. 13 is wound around the spool 27.

The spool 27 is provided with a cup-shaped flange (not shown), and since the outer periphery of the photographic film 13 wound in the cartridge is regulated by this flange, loosening occurs in the cartridge 12. do not do. Accordingly, when the spool 27 is rotated, the rotation can be transmitted to the photographic film 13 without waste, and the photographic film 13 can be sent out by the rotation of the spool 27.

The central portion 24a of the light-shielding lid 24 has a plate shape. When the central portion 24a is substantially parallel to the film outlet 44, the film outlet 44 is released and is substantially perpendicular to the film outlet 44. The film delivery port 44 is in a closed state when rotated so that Further, at both ends of the light-shielding lid 24, a cylindrical shaft end portion 24 is sandwiched between the first and second cases 42 and 43 so as to be rotatable.
b is formed. The shaft end 24b is provided with a notch-shaped engaging portion 24c.

The light-shielding lid driving member 25 includes a disc-shaped gear 46.
And an engaging piece 47 formed in the lower part thereof and engaged with the engaging portion 24c of the light shielding lid 24, and is rotatably attached to a hole 48 formed in the upper surface 21b of the cartridge chamber 21. As described above, the operating member 26 is used in the cartridge chamber 21.
It has one end 30 exposed to the outside through an opening 29 formed in the front side wall 21a and the other end 50 formed with a rack 49 that meshes with the gear 46. The one end 30 has a jig 5 as shown in FIG. 5 when it is pulled out of the unit body 3.
An opening 53 that is hooked by 2 is formed.

As shown in FIG. 6, when one end 30 of the operating member 26 is pulled out from the opening 29 to the outside of the unit body 3 by the jig 52, the rack 49 rotates the gear 46 counterclockwise in the drawing. As a result, the light shielding lid 24 engaged with the engaging piece 47 is also rotated counterclockwise, that is, to the closed position. The meshing amount between the rack 49 and the gear 46 is such that the light shielding lid 24 is disengaged when it is rotated to the closed position, so that the light shielding lid 24 is not rotated more than necessary.

The upper surface 21b of the cartridge chamber 21 is provided with an operating member 2 so that the rack 49 and the gear 46 are not disengaged when the operating member 26 is pulled out of the unit body 3.
Several ridges 54 are provided which contact the side surface of 6 and regulate the movement in the direction orthogonal to the drawing direction. Further, the operation member 26 is provided with projections 55 on both side surfaces in a direction orthogonal to the drawing direction. The projection 55 is provided on the operating member 2
When one end 30 of 6 is pulled out of the unit main body 3 through the opening 29, it abuts on the inner surface of the front side wall 21a, and the projection 5
When the operating member 26 is strongly pulled in the state where 5 is in contact, the thin portion 33 of the front side wall 21a of the cartridge chamber 21 is broken,
As shown in FIG. 7, the front side wall 21 a and the bottom lid 31 are removed from the unit body 3. This makes the Patrone 1
2 can be taken out, and the patrone 12 cannot be refilled.

Next, the operation of the above embodiment will be described.
A user who purchases the lens-fitted film unit 2 shown in FIG. 2 first rotates the winding knob 5 to prepare for photographing such as shutter charging. Then finder 8
Confirm the photographing range with and press the shutter button 6 to photograph one frame. After the photographing, the winding knob 5 is rotated to wind the photographed film 13 for one frame into the cartridge 12. The photographing is repeated as described above, and after all the photographing on the photo film 13 stored in the film roll chamber 22 is completed, the winding knob 5
Rotate the film until the load is removed, and
All are rolled up in the Patrone 12.

Film unit 2 with used lens
The user makes a request for simultaneous printing to a development shop or the like, and the same is sent from the shop to the development station. At the developing station, the paper box 4 is removed and the cartridge 12 is taken out from the unit main body 3. Before the work of taking out the cartridge 12, it is confirmed by rotating the winding knob 5 whether or not the photographic film 13 is entirely wound in the cartridge 12.

Thereafter, as shown in FIG. 5, the jig 52 is inserted into the opening 29 on the front surface of the cartridge chamber 21 and hooked in the opening 53 formed at the one end 30 of the operating member 26. Then, as shown in FIG. 6, when the jig 52 is pulled toward the front surface side of the unit body 3, one end 30 of the operation member 26 is pulled out of the unit body 3 through the opening 29.
At this time, as shown in FIG. 4, the rack 49 provided at the other end 50 of the operation member 26 rotates the gear 46 in the counterclockwise direction, so that the engagement piece 47 formed on the lower portion of the gear 46.
The light-blocking lid 24 is also rotated counterclockwise, that is, to the closed position via. The amount of meshing between the rack 49 and the gear 46 is such that the projection 55 of the operating member 26 comes off when the projection 55 comes into contact with the inner surface of the front side wall 21a. 24 is not rotated more than necessary. Further, when the operation member 26 is pulled, an appropriate load due to the engagement between the rack 49 and the gear 46 is felt, so that it can be confirmed that the light shielding lid 24 is closed by this load.

The projection 55 of the operating member 26 is formed on the front side wall 21a.
After contacting the inner surface of the jig, the jig 52 is pulled more strongly. Then, as shown in FIG. 7, the thin portion 33 formed so as to surround the front side wall 21 a and the bottom lid 31 of the cartridge chamber 21 is broken, and the front side wall 2
The 1a and the bottom lid 31 are detached from the unit body 3 so as to be peeled off. This makes the Patrone 12
Is exposed to the outside, the cartridge 12 can be taken out from below the unit body. When the user takes out the cartridge 12 as described above, it is impossible to refill a new photographic film cartridge.

In the above embodiment, the light-shielding lid driving member is a gear and the other end of the operating member is a rack, but a light-shielding lid driving member 60 and an operating member 61 as shown in FIG. 8 may be used. .

The light-shielding lid driving member 60 is formed integrally with an engaging piece 64 which is engaged with the engaging portion 24c of the light-shielding lid 24 via the upper surface 63a of the cartridge chamber, and above the engaging piece 64. Both ends are locked to a thin disk 65 and a pin 65a formed on the lower surface of the disk 65 and a pin 63b formed on the upper surface 63a, and an engaging piece 64 is attached counterclockwise in the drawing. It is composed of a biasing spring 66. As a result, the light shielding lid 24 is also biased in the counterclockwise direction, that is, the closing direction. A protrusion 65b is formed on the outer periphery of the disc 65, and the protrusion 65b is formed on the other end 6 of the operating member 61.
It is locked by a bifurcated holding piece 67 a provided on the No. 7. Therefore, the light shielding lid 24 is held in the open position.

Then, one end 69 of the operating member 61 is opened at the opening 7
When the holding piece 67a of the operating member 61 and the projection 65b of the disc 65 are released when the holding piece 67a is pulled out of the unit main body from 0, the engagement piece 64 is rotated counterclockwise in the drawing by the spring 66. The light shielding lid 24 is rotated to the closed position. Further, since the projection 71 of the operating member 61 is caught on the edge of the opening 70, if the operating member 61 is pulled harder, the front side wall and the bottom lid of the cartridge chamber are removed as in the above embodiment. As described above, when the light shielding lid driving member is rotated by the biasing force of the spring, a small force is required to pull the operation member when the light shielding lid is rotated toward the closed position.

In each of the above embodiments, the light-shielding lid driving member and the operating member are provided in the upper portion of the cartridge chamber, but they may be provided in the lower portion of the cartridge chamber. In addition, the front side wall and bottom lid of the patrone chamber are removed when the operating member is pulled strongly.However, when the operating member is pulled out backward, the rear side of the patrone chamber of the rear cover is pulled when the operating member is pulled strongly. The portion that covers the cartridge may be removed, and in any case, it is desirable that the cartridge chamber be destroyed so that it cannot be refilled with the closing operation of the light shielding lid of the cartridge.

[0034]

As described above, in the lens-fitted photo film unit of the present invention, when the cartridge is taken out, the operation member is pulled out to the outside of the lens-fitted photo film unit so that the light-shielding lid of the cartridge is closed and the patrone is closed. The side walls of the chamber can be broken. Further, by breaking the side wall of the cartridge chamber, the cartridge can be taken out immediately without releasing the bottom lid, and the refilling of the photographic film cartridge can be prevented more reliably.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a configuration of a unit main body.

FIG. 2 is a perspective view showing an appearance of a lens-fitted film unit of the present invention.

FIG. 3 is a cross-sectional view of an essential part showing a thin portion of the cartridge chamber.

FIG. 4 is a perspective view showing a configuration of a photographic film cartridge.

FIG. 5 is a perspective view showing an appearance of a unit main body.

FIG. 6 is an external perspective view of the unit main body in a state in which the light shielding lid is closed by pulling out the operation member.

FIG. 7 is an external perspective view of the unit main body in a state where the cartridge chamber is broken by pulling out the operation member.

FIG. 8 is an exploded perspective view showing a light-shielding lid driving member and an operating member according to another embodiment of the present invention.

[Explanation of symbols]

 2 Film unit with lens 3 Unit body 12 Patrone 21 Patrone chamber 21a Front side wall 24 Light-shielding lid 25 Light-shielding lid drive member 26 Operation member 29 Opening

Claims (3)

[Claims] 1. A patrone chamber for accommodating a patrone, which is provided with a light-blocking lid rotatable between a closed position for shutting off a film delivery port and an open position for opening it, and pivoting to the upper or lower part of the patrone chamber. A lens-fitted film unit including a light-shielding lid drive member that is freely assembled and that engages with an end of the light-shielding lid to rotate the light-shielding lid from an open position to a closed position. An operating member is provided which is exposed to the outside so that the other end engages with the light-shielding lid driving member and a protrusion that abuts the inner surface of the sidewall of the cartridge chamber is formed in the intermediate portion, and one end of this operating member is withdrawn. By operating the light-shielding lid driving member to the closed position by operation, the sidewall of the cartridge chamber can be broken by the protrusion to take out the cartridge. Film unit, characterized in that there was Unishi. 2. The lens-fitted film unit according to claim 1, wherein a rack is formed at one end of the operation member, and the rack is meshed with a gear formed on the light-shielding lid driving member. . 3. The light-shielding lid driving member comprises an engaging piece engaged with an end portion of the light-shielding lid and a spring biasing the engaging piece toward the closing direction of the light-shielding lid. The end is a holding piece that holds the engaging piece in the open position against the bias of the spring,
2. When one end of the operating member is pulled out, the holding of the engagement piece by the other end is released, and the engagement piece rotates the light shielding lid to the closed position by the biasing of the spring. Film unit with lens.