JPH05188455A - Film unit with lens - Google Patents

Abstract

PURPOSE:To provide a film unit with a lens having a built-in stroboscope where the probability of camera-shake is low in spite of a simplified camera and which is excellent in portability and housing stability. CONSTITUTION:As for the film unit with a lens which has fixed focus, fixed diaphragm and fixed shutter speed and where unexposed film is previously loaded in a photographing performable state, the total weight of the film unit is <=85g. The position of the center of gravity G is set to be on a left side from a center C in facing from the back surface of the film unit.

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 in which a film (silver halide color light-sensitive material) is preliminarily loaded in a photographable state and can be photographed immediately.

[0002]

BACKGROUND OF THE INVENTION In recent years, a so-called lens-equipped film unit (hereinafter also referred to as the present camera), which is sold with a simple plastic camera loaded with a silver halide color light-sensitive material, has become widespread. This frees the user from the trouble of loading a film into an ordinary camera and the failure caused by a mistake in loading the film, and has increased the opportunity for taking photographs due to its simplicity. Also, with a strobe, telephoto type, depending on the shooting purpose
Ultra wide-angle type has been developed and put to practical use.

As is well known, the lens-fitted film unit is a simple type camera in which a photosensitive material is preliminarily loaded by a maker, and the user only uses it to photograph one loaded photosensitive material. Since the film unit is sent to the developing station in a state where the photosensitive material is stored, the camera has a very simple structure to reduce the cost.

Therefore, the lens-fitted film unit body and some parts are made of lightweight plastic,
It also has the advantage of being convenient to carry.

However, when the weight of the lens-equipped film unit is further reduced, the user has a higher probability of shooting with one hand, and since the moment of inertia is small due to the weight reduction, the occurrence of camera shake is becoming a problem. Since the shutter button of the film unit with a lens is usually on the right side when viewed from the back of the photographing unit, the user often holds it with his right hand for photographing. In addition, since it is small and lightweight after shooting, it is often stored in the pocket of clothes as it is, but in that case, it was found that it is often stored with the left side of the film unit with lens facing down. Examination of storage stability in the pocket is also desired.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lens-equipped film unit which is less likely to cause camera shake even in a simple and lightweight simple camera, and which is excellent in portability and storage stability.

[0007]

The object of the present invention is to provide a fixed focus, a fixed aperture,
In a lens-equipped film unit having a fixed shutter speed and pre-loaded unexposed film ready for shooting, the total weight of the lens-equipped film unit is 85 g or less, and the center of gravity is from the back of the lens-equipped film unit. Achieved by a lensed film unit characterized by being to the left of the center.

In the present invention, the center of gravity of the photographing unit can be adjusted arbitrarily, but it can be adjusted by the layout of components inside the photographing unit, the thickness adjustment of the main body member, the filling of the weight member, and the like.

The center of gravity of the film in the lens-fitted film unit is determined in a state in which half of the predetermined frames have been wound up.

A method of obtaining the center of gravity of the film unit with lens will be described. Place one equilateral triangular pillar-shaped metal rail on the horizontal plane and gently place it with the back of the shooting unit down and the long side of the back and the rail at a right angle to mark a well-balanced center of gravity. . Similarly, gently place the rails so that the long sides of the back are parallel to the rails, and mark the balanced center of gravity. The center of gravity line where the center of gravity plane intersects is calculated. This is defined as the center of gravity in the present invention.
Originally, the center of gravity is a point, but the object of the present invention is achieved by adjusting the position of the center of gravity line obtained by the above-described method.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an external view of a film unit with a lens according to the present invention, which is provided with 35 mm film (J135) pre-loaded in the camera, and does not rewind after shooting. The film is sent to the manufacturer while it is still in the camera, the film is taken out from the camera, and the film is developed and printed.

The unexposed film used in this camera is I
It is loaded with a film of SO sensitivity 400 wound around a spool, and is wound up in a patrone by winding up each time a picture is taken. Therefore, on the maker side, the film already taken can be taken out from this camera in the bright room.

The taken film can be easily taken out by bending a part of the back cover. Therefore, if the camera part is checked and a new unexposed film is loaded and the back cover is replaced. It can be reused.

As a cartridge and a spool to be loaded in this camera, a cartridge having a smaller outer diameter of 20.6 mm and a spool having a spool diameter of 9 mm are used. ..

As a result, the total thickness of the camera can be suppressed to around 24 mm, and an ultra-thin compact camera is realized.

The camera is provided with a cardboard carton (paper cover) on which a product name, a simple usage method and the like are displayed, on a part of its outer surface.

FIG. 2 is a development view showing the structure of the present 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 50 denotes a film winding unit.

When the camera body 10 is used alone, each member constituting the film winding unit 50 is mounted, and a shutter case 11 for accommodating shutter blades is mounted.

The shutter case 11 is fixed by engaging claws 11A provided on both sides with a locking portion 10A on the front surface of the camera body 10, and the shutter blades are linked to the film winding unit 50.

Further, on the front surface of the shutter case 11, there is a single-lens lens having a focal length f = 30 mm, and the photographic lens 12 which is a fixed aperture of F9.5 is dropped into the guide pin 11B.
It is covered by a lens retainer 13 having a slit 13A that engages with.

The camera body 10 and the 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.

Fixing and integrating the lens retainer 13 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 attached to the rear surface of the eyepiece 23 of the finder to photograph and mount the camera body.
Mounted on the front of 10. In this way, the objective lens 21 and the eyepiece lens 23 constitute an inverse Galileo finder.

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 on the front of the camera body 10, a nail 10F, and a side engaging portion 10G. It is fitted and attached.

The lens retainer 13 is fixed to the camera body 10 by the engagement device of the front cover 20 to the camera body 10.

The camera body 10 mounted with the front cover 20
In the cartridge, a cartridge chamber and a scroll chamber (neither shown) formed on the back surface of the cartridge are loaded with a cartridge P1 and a spool S2 around which an unexposed film F is wound.

The tip of the film F is a cartridge P.
It is locked in the spool in 1 and is loaded in the cartridge P1 in a condition that it can be wound.

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 light shielding of the film F and the regulation of the focus surface position are maintained.

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.

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

FIG. 3 shows each of the above-mentioned mechanisms at an angle when viewed from the rear side of the camera, and FIG. 4 shows a film and a cartridge loaded into the camera.

In FIG. 3, reference numeral 10 denotes a camera body which is provided with a film winding mechanism and the like. In the camera body 10, a cartridge chamber 15A and a scroll chamber 15B are 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.
Is provided so that the J135 film FL wound in the cartridge P1 which is the storage container shown in FIG. 4 can be loaded.

The film FL used in this camera of this embodiment is a roll film J135, which is similar to a general camera, in which a cartridge is used as a storage container in advance in a dark room or the like.
The end of the spool S1 is fixed to the spool S1 and the film is wound up for a predetermined number of frames so that the film can be photographed. 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 engages 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, in this embodiment, the film FL is pulled out until the tip of the film notcher FN of the film FL matches the index 17A on the lower portion of the lower rail surface, and the tip of the film FL is slit SL of the spool S2.
And the perforation P of the film FL is locked to the nail H.

Next, the back cover 30 is covered and the cover is made light-tight.
Then, the main camera in this state is attached to the film winding device, and the film FL is attached to the spool S2 of the scroll chamber 15B.
The film is loaded by winding it up. That is, by loading the film FL in this way, the film FL is sequentially wound into the patrone P1 for each photographing, and after the photographing of a predetermined number of frames is completed, in the present embodiment, two frames are preliminarily fed. Then, the front end of the film FL is wound into the cartridge P1 with the required length left without being wound into the cartridge. Therefore, this cartridge 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 FL loaded as described above is wound up by rotating the film winding knob 51 counterclockwise. A cam 55 having a fan-shaped cam portion 55B at the lower portion, which is coaxial with the sprocket gear 54 having eight teeth and which meshes with the perforation P of the film FL, has a fan-shaped cam portion 55B at the bottom, and the cam 55 is exactly 1 in the counterclockwise direction.
It is designed to rotate.

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 moves the charge lever 61 and 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 the 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 then the rising portion 65B is overcome and the sector charge mechanism is charged as shown in the figure.

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,
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 arm portion of the cam stopper 62.
The arm 62A is in contact with the end surface of the arm portion 61A by the spring force of the hoisting stopper spring 58 which is displaced from each edge of the arm 62A and urges clockwise. 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 so as to prevent the film winding knob 51 from rotating in the opposite winding 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.

The charge lever 61, which is stronger than the sector spring 67, rotates counterclockwise by the spring force of the charge lever spring 64.
C hits the rising portion 65B of the sector lever 65 and then comes off 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 the sector spring 67
It returns to its original state due to the pulling force of. Therefore, sector drive pin 65A
Will rotate sector 66 about sector pin 18D to expose the film and then close it.

The shutter speed performed by opening and closing the sector 66 is set to a fixed shutter speed of 1/100 sec.

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 planted in the cam 55 which 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 attached to the upper surface of the index plate gear 72 so that the remaining filmable number of films can be 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 projected by the next film winding after the photographing of a predetermined number of frames is completed.
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, in the present embodiment, when two frames of film are fed in an idle manner, the index plate gear 72 rotates by two teeth. This rotation causes the protrusion 72 of the index plate gear 72 to rotate.
A is a charge lever that holds down the protrusion 61E at all.
The movement of 61 is blocked, but another protrusion 62 of the cam stopper 62 is
It is designed to come off from E. Therefore, the protrusion 62D
Jumps into the groove 55A of the cam 55, the winding stopper 57 is disengaged, and the winding stopper 57 locks the winding knob 51, so that 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 tongue at the leading end of the film is prevented from being caught in the cartridge and the tongue of the required length is secured. Therefore, in order to make the camera compact, even if a cartridge having a small outer diameter is used, there is no problem in pulling out the film from the cartridge at the time of development.

The lens-fitted film unit of the embodiment described above effectively uses a plastic material and is formed thin to reduce the weight, and the total weight is 85 g or less. Regarding the position of the center of gravity as well, consider the component placement, and fill the vertical position near the end face on the left side from the back surface of the lens-equipped film unit with a small amount of weight member as necessary, and the position of the center of gravity is on the left side of the center. It is composed.

The configuration, operation, and weight / center of gravity position of the lens-fitted film unit of this embodiment have been described above. However, the present invention is not limited to the method of winding the color light-sensitive material on the cartridge. For example, there may be a system in which a camera portion (b) and a cartridge portion (a) as shown in FIG. 5, the cartridge portion is detachable from the camera portion, and the cartridge portion also serves as the camera portion back cover. In the figure, 521 is a cartridge portion containing a film, 522 is a main body portion of the photographing unit, and 523
Is a photographing lens, 524 is a shutter and a fixed diaphragm, and 525 is a locking portion that locks the cartridge portion 521 to the main body portion 522 of the photographing unit to enable photographing. The film unit with a lens having such a structure has a great advantage in the reuse of the camera portion and the reuse of the cartridge portion.

In the present invention, as described in the embodiments, it is preferable that the main body of the photographing unit and a part of the parts are made of plastic for weight saving and cost reduction. The preferred plastic conditions are excellent light-shielding properties, little influence on the photographic characteristics of the light-sensitive material,
Known materials can be used as long as they are easy to recycle and use. As a preferred specific example, polystyrene with carbon black or pigment added to provide light-shielding properties,
Polypropylene, polyethylene, polyvinyl chloride, polymethylmethacrylate, polyethylene terephthalate,
Examples thereof include cellulose acetate and copolymers thereof.

The film unit with lens of the present invention is preferably provided with a carton (cover) as shown in the embodiments.

The material of the cover is preferably one that can absorb impact, for example, paper, sponge, rubber, leather, cloth or the like. The shape of the cover is not limited, but a band-shaped or box-shaped one is preferable, and a cover having holes so as not to hinder the functions and operations of the lens unit, the finder unit, the shutter button unit, the film winding unit, etc. of the photographing unit. preferable.

The lens-fitted film unit of the present invention is preferably hermetically packaged by a plastic case, a moisture-proof bag or the like after the production and before use. Relative humidity at 25 ℃ is 30 ~ 70%, preferably 40 ~
It is 60%, particularly preferably 45 to 55%, and the oxygen partial pressure can be made lower than atmospheric pressure by filling with an inert gas.

[0063]

According to the present invention, it is possible to provide a film unit with a lens which has a low possibility of being shaken by a camera even though it is a simple type camera and which is excellent in portability and storage stability.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of the overall configuration of the embodiment shown in FIG.

FIG. 3 is an exploded perspective view of a mechanism portion of the embodiment shown in FIG.

FIG. 4 is a perspective view showing a film and a cartridge used in this embodiment.

FIG. 5 shows a cross-sectional view of another embodiment.

[Explanation of symbols] 10 Camera body 12 Photographing lens 21 Objective lens (finder) 23 Eyepiece (finder) 66 Sector (shutter blade) FL film P1 Patrone C Center position G Center of gravity position

Claims (1)

[Claims] 1. A lens-equipped film unit having a fixed focus, a fixed aperture, and a fixed shutter speed, which is preliminarily loaded with an unexposed film in a photographable state, and the total weight of the lens-equipped film unit is 85 g or less, In addition, the film unit with lens is characterized in that the position of the center of gravity is on the left side of the center from the back surface of the film unit with lens.