JPH05232556A - Film unit with lens - Google Patents

Abstract

PURPOSE:To facilitate the feed of film by making unexposed film wound round a spool in a state of 'released winding'. CONSTITUTION:A lug H engaging the perforation P of the film F is provided in a shape that it can be easily engaged/disengaged on the peripheral surface of the shaft part of the spool S2A. By somewhat reversely rotating the spool S2A after the spool S2A is rotated so that the film F engaged by the lug H may be drawn out from a cartridge P1 and wound to be tightly wound round the shaft part by tensile force generated by a resistance, the perforation P is disengaged from the lug H so as to make the wound film F in the state of what is called 'released winding'.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film unit with a lens, which has an exposure function and a film winding function and can immediately take a photograph of an unexposed film loaded in advance.

[0002]

2. Description of the Related Art A film unit with a lens is a so-called film-integrated camera having a function of taking a picture, which is also called a "shooting-only camera". Since it is used only for film shooting and the camera body is discarded after taking out the exposed film, it is manufactured at a low cost with a simple structure.

[0003]

However, in spite of the simple structure, the film winding operation which is carried out each time a picture is taken is not limited to the film feeding resistance, and the mechanical parts such as the setting of the shutter and the film counter are moved. Since the load is added, the load tends to be large for a camera handled by women and children. In addition, there has been a demand for a camera that can be reused (disposable) without being thrown away because of the demand for resource saving. In particular, as will be described in the following examples, a relatively thin film is used, and a cartridge having an outer diameter of 18 to 21 mmφ and a spool of 9 to 10 mmφ is inserted inside in order to make the camera thin. Since a spool of ~ 11mmφ is used and the parts are thinly packed, the winding torque tends to be high.

The present invention solves this problem and improves it.
An object of the present invention is to provide a lens-fitted film unit that reduces the film feeding resistance and makes the winding operation light and easy.

[0005]

SUMMARY OF THE INVENTION The above object is to provide a lens-equipped film unit in which a film is preliminarily wound around a winding shaft of a film winding chamber from a loaded cartridge, and the winding shaft is reversely rotated by a predetermined angle after the film is wound. A lens-equipped film unit characterized in that it is configured to release the engagement with the film, and a lens-equipped film unit in which the film is preliminarily wound up on the winding shaft of the film winding chamber from the loaded cartridge. A structure in which the winding shaft has a double structure of an inner cylinder and an outer cylinder each having a slit for inserting a film, and the film is sandwiched by the driving of the inner cylinder and wound around the outer cylinder. The film unit with a lens characterized by the above, and the film loaded in advance from the loaded cartridge on the winding shaft of the film winding chamber. In the lens-equipped film unit, the winding shaft is a spiral body that is screwed into the unit body, and is configured to move and retreat to the outside of the unit body by the rotation accompanying the winding of the film. Accomplished by a unit.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an external view of a film unit with a lens (hereinafter also referred to as the present camera) of the present invention, that is, a film-integrated camera, which is sold with a 35 mm film (J135) preloaded. After filming, the film is sent to the lab without being rewound in the camera and developed and printed.

The unexposed film used in this camera is loaded in a cartridge, and after the camera is kept in a light-tight state, the winding shaft on the film winding chamber side is driven to drive the film inside the cartridge. Wind all the film into the film winding room.
The user winds the film every time the photograph is taken, so that the photographed film is wound in the patrone.
Therefore, in the laboratory, the film that has been taken can be taken out from the camera in the bright room without changing the cartridge.

[0008] In addition, for taking out the photographed film, a back cover or the like is used.
This can be easily done by bending a part of the outer shell member, so that if the manufacturer replaces the back cover, a new unexposed film can be loaded and reused, that is, a reuse camera.

As a cartridge loaded in the camera, a cartridge having an outer diameter of φ20.6 mm, which is different from a cartridge (JISK7528) which is generally used, is used. Although the following description will be given using this small-sized patrone, the present invention is not limited thereto and can be applied to a normal patrone.

As a result, the thickness of the camera can be suppressed to about 24 mm except for the lens barrel portion having the taking lens, and an ultra-thin compact camera is realized.

The present camera is provided with a cardboard carton on which a product name and a simple usage method are displayed on a part of the outer surface thereof.

FIG. 2 is a development view showing the structure of the camera.

Reference numerals 10, 20 and 30 denote a camera body, a front cover and a back lid, which are main components of the camera, and 40 denotes a built-in strobe unit and 50 and 60.
Reference numerals 70 and 70 are film winding, sector charge and film counter mechanisms, respectively.

When the camera body 10 is used alone, each member constituting the film winding mechanism 50, the sector charge mechanism 60, and the film counter mechanism 70 is mounted, and the shutter case 11 for housing the sector is mounted.

The shutter case 11 is fixed by engaging claws 11A protruding from both sides with a locking portion 10A on the front surface of the camera body 10, and links the sector to the sector charge mechanism 60.

Further, on the front surface of the shutter case 11, a photographing lens 12 having a focal length f = 30 mm and a diaphragm of F9.5 is dropped, and a slit 13A is engaged with the guide pin 11B. Covered by lens presser 13.

The camera body 10 and shutter case 11 described above
Is made of a black matte plastic material having some elasticity, including the front cover 20 and the back cover 30 described above.

On the other hand, the strobe unit 40 is mounted and supported on the basis of holes 40A and 40B on the substrate which engage with the guide pins 10B and 10C on the front surface of the camera body 10, respectively.

The upper and lower battery sections 41 integrated with the strobe unit 40 are inserted into the upper and lower slit holes 10D of the camera body 10 and projected into the battery chamber on the back side of the camera body 10 to form an AA battery E as a strobe charging power source. To pinch.

The integrated capacitor C is stored in a capacitor chamber formed under the shutter case 11.

The lens retainer 13 and the strobe unit 40 described above.
The fixing and integration of the above with the camera body 10 is completed by mounting the front cover 20 on the camera body 10.

Prior to mounting the front cover 20 on the camera body 10, an objective lens 21 of a finder is dropped in front of the front cover 20 and is fixed by engaging a decorative cover 22. The makeup cover 22 has a guide pin 22A and four nails 22B on the back.
The front cover 20 and the holes 20A and 4 on the front of the front cover 20, respectively.
It is attached by engaging with the locking portion 20B at the location.

The front cover 20 is further mounted on the front surface of the camera body 10 after the eyepiece lens 23 of the finder is engaged and mounted on the rear surface.

The front cover 20 is provided with a hole 20C, a claw 20D, and three engaging portions 20E on the back surface, and the front cover 20 has a guide pin 10E, a nail 10F and a side engaging portion 10G on the front of the camera body 10, respectively. It is fitted and attached.

By mounting the front cover 20 on the camera body 10, the lens retainer 13 and the strobe unit 40 are fixed to the camera body 10.

The camera body 10 with the front cover 20 attached
In the cartridge chamber 15A and the scroll chamber (film winding chamber) 15B formed on the back surface of the cartridge, the cartridge P1 and the spool S2 in which the leading ends of the unexposed film F are locked are loaded, respectively.

The other end of the film F is locked to the spool S1 in the cartridge P1. Even if the film in the cartridge is wound up by the spool S2 after the film is loaded, the other end is locked to the spool S1. Therefore, it can be rolled up in the Patrone P1 every time the shooting is completed.

A back cover 30 is attached to the back surface of the camera body 10 in which the film F is loaded so that the film F is protected from light and the focus surface position is restricted.

The back cover 30 is provided with claws 30A and 30B on the front surface thereof and locking holes 30C and 30D on the side surfaces thereof.
Claws 30A and 30B are engaged with the camera body 10 when mounted on the camera.
On the 10H and 10J, the one holes 30C and 30D are the nails 10 of the camera body 10.
It is fixed by engaging K and 10L.

After the back cover 30 is mounted, a predetermined film winding operation is performed to set a photographable screen, and the carton shown in FIG. 1 is mounted to complete the process.

Next, details of the film winding mechanism 50, the sector charge mechanism 60, and the film counter mechanism 70 will be described.

FIGS. 3 and 4 show the above-mentioned respective mechanical parts at an angle as viewed from the rear side of the camera.

In the camera body 10, a cartridge chamber 15 is provided as two storage chambers for film winding and film loading in the same plane on both sides of the screen frame 16 which is the exposure unit.
A and a scroll chamber 15B are provided so that a J135 film F wound in a cartridge P which is a storage container shown in FIG. 4 can be loaded.

The film F coated with the light-sensitive material used in the present camera of this embodiment is a roll film J135 or a slightly thin roll film of 110 to 140 μm, which is used in a dark room or the like in a cartridge as a container. The end of the cartridge is fixed to the spool S1 of the cartridge P1 by a length such that a predetermined number of frames can be photographed, and a film of a certain length is ejected from the film outlet of the cartridge P1. The film in this state will be loaded into the camera. The loading method will be described below.

The cartridge P1 is loaded in the cartridge chamber 15A so that the spool S1 of the cartridge P1 is engaged with the fork 52 of the hoisting fork 52. On the other hand, the spool S2 is also inserted in the scroll chamber 15B. Then, the tip of the film notcher FN of the film F is located at the lower portion of the lower rail surface, which is an index 17.
The film F is pulled out until it fits A, and the tip of the entire film F (however, the other end is within the range where it does not separate from the spool S1 of the cartridge P1) is inserted into the slit SL of the spool S2, and the perforation P of the film F is hooked on the nail H. ..

Next, the back cover 30 is covered and the cover is light-tight.
Then, the main camera in this state is attached to the film winding device, the film F is wound around the spool S2 of the scroll chamber 15B, and the loading of the film is completed. That is, by loading the film F in this way, the film F is sequentially wound into the patrone P1 for each shooting, and when two films are fed in advance after the shooting of a predetermined number of films is completed, The photographed film is wound into the cartridge P1 while leaving the required length without the leading end being wound into the cartridge. Therefore,
This patrone can be taken out from this camera in a bright room.

Next, the mechanism of the main body will be described.

The camera body 10 has a film winding mechanism 50 including a photographing lens 12 and a sector charge mechanism 60.
The main mechanism of the film counter mechanism 70 is incorporated therein.

First, the film winding mechanism and the sector charge mechanism will be described.

Reference numeral 51 denotes a film winding knob, and the film F loaded as described above is wound up by turning the film winding knob 51 counterclockwise. A cam 55 coaxial with an eight-toothed sprocket gear 54 meshing with the perforation P of the film F and having a fan-shaped cam portion 55B at the bottom.
Is designed to rotate exactly once counterclockwise by winding the film.

That is, the film is wound up with one per piece having a length of eight perforations, which is the number of teeth of the sprocket gear, and the piece size is a so-called full size piece size of 24 × 36 mm.

By the counterclockwise rotation of the cam 55, the fan-shaped cam portion 55B naturally rotates counterclockwise as described above, and in the process, the fan-shaped cam portion 55B causes the charge lever 61 to move to the charge lever shaft 63. Is rotated clockwise against the spring force of the charge lever spring 64 that urges the charge lever 61 in a counterclockwise direction, and the triangular ketobashi 61C provided on the charge lever 61 causes the rising portion 65B of the sector lever 65 to rise.
Is pressed, and the rising portion 65B is eventually overcome to charge the sector charge mechanism as shown in the figure.

The pin 65C of the sector lever 65 and the camera body 10
A sector spring 67 is stretched between the pins 18C provided at the sector lever 67, and the tensile force of the sector spring 67 causes the sector lever 65 to move.
The left end of the elongated hole is brought into contact with a pin 18B provided on the camera body 10 that guides the elongated hole of the camera in a slidable and rotatable manner, and the sector lever
Pin 18 provided on camera body 10 with arm plate 65D provided on 65
It comes in contact with E. Further, a sector drive pin 65A for actuating the sector 66 pivotally supported by the sector pin 18D provided on the camera body 10 is inserted in the forked portion of the sector 66.

As will be described later, the cam stopper after shooting is completed.
The projecting portion 62D of 62 is removed from the groove portion 55A of the cam 55, and the arm portion 57A of the hoisting stopper 57 changes from the state shown in the drawing to change the arm portion 61A of the charge lever 61 and the cam stopper 62.
The arm portion 62A is disengaged from each edge of the arm portion 62A and abuts against the end surface of the arm portion 61A by the spring force of the hoisting stopper spring 58 which is biased in the clockwise direction. When the cam 55 rotates exactly once as described above by the film winding and the groove 55A of the cam 55 returns to the initial position, the spring force that biases the cam stopper 62 in the clockwise direction by the horizontal end portion of the charge lever spring 64. As a result, the protrusion 62D of the cam stopper 62 jumps into the groove 55A. By this jumping operation, the lock of the arm portion 57A of the hoisting stopper 57, which was locked at the end surface of the arm portion 62A of the cam stopper 62 at this time, is released.

The outer peripheral cylindrical surface of the film winding knob 51 is a ratchet gear, and the V-shaped projection at the tip of the winding stopper 57 is released by the release of the lock, and the spring force of the winding stopper spring 58 causes the ratchet to rotate. It jumps into the tooth groove of the gear 51A and prevents the film winding knob 51 from rotating in the counterclockwise direction. That is, when the film winding is completed, the film winding knob 51 is prevented from further winding rotation.

Further, in the camera body 10, the tip of the reverse rotation preventing claw 53 utilizing the elasticity of the resin material is pressed against the ratchet gear 51A to prevent the film winding knob 51 from rotating in the opposite direction. It has become.

By pressing the release button 25 of the front cover 20, the release button pin 25A is planted on the back surface of the release button 25.
Operates in the direction of arrow A. That is, the front cover 20
When attached to the camera body 10, the winding knob
51 By the operation of the tip of the release button pin 25A in the direction of arrow A described above, the hoisting stopper 57 rotates counterclockwise against the spring force of the hoisting stopper spring 58. Then, from the end surface of the arm portion 57A of the hoisting stopper 57, the arm portion of the charge lever 61
The edge of 61A is disengaged, and the charge lever 61, and thus the cam stopper 62, is rotated counterclockwise by the spring force of the charge lever spring 64.

By rotating the charge lever 61 counterclockwise, the ketobashi 61C of the charge lever 61 is
The sector lever 65 is tapped on the rising portion 65B and then separated from the rising portion 65B. Therefore, the sector lever 65 rotates clockwise around the pin 18B in the long groove of the sector lever against the tensile force of the sector spring 67, and then returns to the original state by the tensile force of the sector spring 67. Therefore, the sector drive pin 65A rotates the sector 66 around the sector pin 18D to expose the film and then closes it.

On the other hand, the cam stopper 62 also rotates counterclockwise together with the charge lever 61 as described above,
The protruding portion 62D of 62 is removed from the groove portion 55A of the cam 55. Therefore, even if you stop pressing the release button, the winding stopper
The arm portion 57A of 57 is biased in the clockwise direction by the spring force of the hoisting stopper spring 58, but the arm portion 61A of the charge lever 61.
Is stopped by the end face of the
The shaped protrusion does not lock the ratchet gear 51A of the winding knob 51. Therefore, the next film winding can be performed.

Next, the film counter mechanism will be described.

As described above, 72 meshes with the V groove 56A provided at the upper end of the cam shaft 56 that is planted in the cam 55 that rotates integrally with the sprocket gear 54, and one frame of film is wound up to form a cam shaft. It is an exponential gear that rotates clockwise one tooth each time 56 rotates once.

An index plate 71 is printed on the upper surface of the index wheel gear 72 as an integrally molded product, and the remaining number of film-capable images is displayed through the film counter window 26 on the upper surface of the front cover 20.

A projecting portion 72A is provided on the lower surface of the exponential gear 72, and the projecting portion 72A is formed by the film winding after the filming of a predetermined number of frames is finished.
It is designed to be inserted between the E and another protruding portion 62E of the cam stopper 62 so as to enter. Then, the projecting portion 72A is replaced by the two projecting portions 61.
By entering between E and 62E, the film is wound up by one frame, and even if the cam 55 makes one rotation and the charging of the sector is completed, both the projecting portions 61E and 62E become the projecting portion 72A of the exponential gear 72. As the movement is blocked, the charge lever 61 cannot operate and the protruding portion 62D of the cam stopper 62 is also in the groove portion of the cam 55.
You will not be able to jump into 55A. The arm portion 57A of the hoisting stopper 57 contacts the end face of the arm portion 62A of the cam stopper 62 by the spring force of the hoisting stopper spring 58, and the V-shaped projection at the tip of the hoisting stopper 57 locks the ratchet gear 51A. Also, it is not possible to operate the charge lever 61 to open and close the sector to expose the film.

In this way, when the two frames of film are unwound, the index plate gear 72 rotates by two teeth,
By this rotation, the protruding portion 72A of the exponential gear 72 presses the protruding portion 61E at all to prevent the movement of the charge lever 61, but comes off from the protruding portion 62E of the cam stopper 62. Therefore, the protrusion 62D is the groove 55A of the cam 55.
Jumping up to the top, the locking of the hoisting stopper 57 is released and the hoisting stopper
Since the winding knob 51 is locked by 57, the film cannot be wound. Further, as described above, the movement of the charge lever 61 is blocked so that the film cannot be exposed. In this way, the leading edge of the film is prevented from being caught in the cartridge.

FIG. 5 shows the respective forms of the claw H of the spool S2 according to claim 1 of the present invention for external appearance and its AA.
It is shown by a cross section.

The spool S2A shown in FIG. 5 (a) is an example in which a pair of claws H for engaging the perforations P of the film F are projected at symmetrical positions on the peripheral surface of the shaft portion. Engagement of the horation P is extremely easy and reliable.

Each of the spools S2B and S2C shown in FIGS. 5 (b) and 5 (c) is an example in which the claw H is embedded in the peripheral surface of the shaft portion, and the engagement of the perforation P is slightly troublesome. However, there is a feature that the film F can be wound on the shaft portion in a completely tightly wound state.

Each of the above spools S2A, S2B and S
When both 2C are rotated by a predetermined angle after the winding of the film F is finished, that is, when the film F is rotated in the clockwise direction in the drawing, the nails H deviate from the perforations P and the film F is wound.
Can be released from each spool in a so-called “bull winding” state.

Therefore, at the time of film feeding during photographing,
Since the load for rotating the spool S2 is eliminated, the operation of the hoisting knob 51 described above is light and easy correspondingly.

FIG. 6 shows a schematic structure of the spool S2 according to claim 2 of the present invention by a vertical sectional view and its BB sectional view.

The spool S2 is composed of a cylindrical outer cylinder I having a shaft portion and a flange portion integrally formed therein, and a rotatable inner cylinder II which is fitted in the outer cylinder I and is rotatable. There is.

A gap C is provided between the inner circumference of the outer cylinder I and the outer circumference of the inner cylinder II, and the slit SL1 of the outer cylinder I and the slit SL2 of the inner cylinder II are aligned with each other with the gap C therebetween. You can do it. Although the gap C is shown enlarged in order to make it easy to understand in the drawing, it is configured so that it can be actually held by the film thickness and the material.

When the front end of the film F is inserted with SL2 aligned with the slit SL1 and the inner cylinder II is rotated counterclockwise in the figure, the film F is pulled out by the resistance force when it is pulled out from the cartridge P1. As shown in FIG. 6 (b), since the leading end of the film F is bent and locked to the shaft, the film F is then wound around the outer cylinder I by continuing the rotation of the inner cylinder II. You can do it.

When the winding operation of the film F is completed and the rotation operation of the inner cylinder II is stopped so as to be in a free state, the elastic recovery of the tip end portion of the folded film F causes the inner movement as shown in FIG. 6 (c). Cylinder II has slit SL2 and outer cylinder I has slit SL
Reversed clockwise until the angle matches 1.

Therefore, the wound film F is in a so-called "bull winding" state, the leading end of which is pulled out from the slit, and is in a free state, so that the load of film feeding is reduced.

Further, FIG. 7 shows a structure of the spool S2 according to claim 3 of the present invention.

The spool S2 is a male screw spiral body having no flange, and right handed screw portions t1 and t2 are continuously formed on the outer circumference thereof.

The threaded portions t1 and t2 are composed of the same one thread and two thread of the lead, respectively, and are shown in FIG.
As shown in FIG. 5, the end of the threaded portion t1 is housed in the scroll chamber 15B in advance and screwed into a spiral hole of a female screw provided on the camera body 10.

The above-mentioned spiral hole corresponds to the threaded portion t of the spool S2.
1 is provided with a threaded portion T1 formed of a single thread and a threaded portion T2 formed of two threads threadedly engaged with the thread t2 and allowing passage of the thread t1.

When the front end of the film F is inserted into the slit SL in the state shown in FIG. 7 (a) and the spool S2 is rotated counterclockwise when viewed from the direction C, the spool S2 moves from the scroll chamber 15B to the camera main body 10. The film F is wound around the peripheral surface of the film F while moving and retracting toward the outside.

The spool S2 is continuously rotated until the screw portion t2 is screwed to the screw portion T2 of the spiral hole described above, and the propulsion is stopped by the screw portion T1. After the winding is completed, the leading end of the film F is also released from the slit SL to be free, and the wound film F is brought into a “bull winding” state.

Therefore, the film F in the scroll chamber 15B
Is easily fed by the film winding knob 51 without receiving the rotation resistance of the spool S2. The unnecessary spool S2 that protrudes to the outside of the camera body 10 is discarded at the position of the cut groove G that is provided and set in advance. As in this embodiment, when the winding is completed, the spool S
Since most of the 2 are removed by the manufacturer, after the sale, there is an effect that the user does not refill the film by himself and does not show the poor quality camera to the world.

[0073]

As described above, according to the present invention, the rotational resistance of the spool in the scroll chamber at the time of feeding the film is eliminated, and as a result, the film winding load is reduced and the operation is easy and the durability is improved even for a beginner. A film unit with a lens will be provided.

[Brief description of drawings]

FIG. 1 is an external perspective view of a film unit with a lens of the present invention.

FIG. 2 is an exploded perspective view showing a configuration of the unit.

FIG. 3 is a developed perspective view showing a film winding mechanism and the like of the unit.

FIG. 4 is an explanatory diagram of a film loaded in the unit.

FIG. 5 is an external view and a cross-sectional view of the spool according to claim 1.

FIG. 6 is a sectional view of a spool according to a second aspect of the present invention.

FIG. 7 is an explanatory diagram of a spool according to claim 3;

[Explanation of symbols]

 10 Camera body 15A Patrone chamber 15B Scroll chamber 20 Front cover 30 Back cover P1 Patrone S2, S2A, S2B, S2C Spool H Claw SL. SL1, SL2 Slit F Film P Perforation I Outer cylinder II Inner cylinder t1, t2 (male) threaded part T1, T2 (female) threaded part

Claims (3)

[Claims] 1. A lens-equipped film unit in which a film is preliminarily wound around a winding shaft of a film winding chamber from a loaded cartridge, and the winding shaft is reversely rotated by a predetermined angle after the film has been wound to engage with the film. A film unit with a lens, which is configured to be released. 2. A lens-equipped film unit in which a film is preliminarily wound around a winding shaft of a film winding chamber from a loaded cartridge, wherein the winding shaft includes an inner cylinder and an outer cylinder each having a slit for inserting the film. A lens-equipped film unit having a double structure, wherein the film is sandwiched by the inner cylinder being driven and wound around the outer cylinder. 3. A lens-equipped film unit in which a film is preliminarily wound around a winding shaft of a film winding chamber from a loaded cartridge, wherein the winding shaft is a spiral body screwed into the unit main body. A film unit with a lens, which is configured to move and retreat to the outside of the unit main body due to the rotation associated with