JPH05210152A - Film unit with lens - Google Patents

Abstract

PURPOSE:To always stably position a photosensitive surface with reference to the focal plane of a curved image frame even in the case of loading film having different thickness. CONSTITUTION:A pressing part 30F on a back cover 30 side is allowed to press-contact with a spool S2 round which unexposed film F is wound to brake the rotation of the spool S2, so that the film F is fed in a state where tension is always applied to the film F, and both ends of the film F moved to the image frame 16 are allowed to press-bond to a rail surface 10M by a rising part 30E on the back cover 30 side, so that the photosensitive surface is brought into contact with the rail surface 10M to be accurately positioned with reference to the focal plane of a camera regardless of the thickness of the film F.

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 feeding / 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.

In addition, although cameras are often purchased and used on the go while traveling, it is hard to say that they are convenient to carry, and they are equipped with a taking lens of f = 35 mm and have an outer shape of 110 mm × 60 m.
It was about mx 35 mm, and I couldn't get it into the chest of my shirt, which was inconvenient.

[0004]

However, various measures have been taken in order to make the camera compact, especially to realize a thin type. For example, a thin film for exclusive use with "shooting-only camera" can be considered, but on the other hand due to cost reasons a single lens for shooting is used and the focal plane is not a perfect plane but a curved surface. Aberration is also large, and therefore, there remains a performance problem of stabilizing the film surface with respect to the focal plane of the camera for correcting aberration. That is, even if the lens f is small and the film feeding surface is curved to remove the aberration, the film feeding can be safely fed along the curved surface, and the film wound on the patrone becomes a bull roll and is small in size. It is required that the film does not exhibit pressure fog due to interference with each other in the cartridge, and that even thin films can be fed neatly along the film feeding surface even if the film has a weak waist.

As a result of solving and improving this point, the present invention provides
An object of the present invention is to provide a film unit with a lens that can always hold the photosensitive surface at a fixed position with respect to the focal plane of the camera regardless of the type and thickness of the film.

[0006]

SUMMARY OF THE INVENTION The above-mentioned object is to provide a lens-equipped film unit in which an unexposed film capable of taking a photograph by means of a built-in exposure and film feeding means is preliminarily loaded. A film unit with a lens characterized in that the photosensitive surface of the film is fed along the focal plane of the taking lens of the unit, and a built-in exposure and film feeding means enables photography. A lens-equipped film unit pre-loaded with an unexposed film is provided with a member for applying a braking force to the rotation of a spool wound with the film pre-loaded in the unit. ..

[0007]

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 maker without removing it from the camera, and the film is developed and printed.

The unexposed film used in this camera is loaded in a cartridge, and after the camera is set 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, on the maker side, the film that has already been taken can be taken out from the camera as a patrone in a bright room.

Further, it is possible to easily take out the photographed film by bending a part of the back cover. Therefore, if the back cover is exchanged, a new unexposed film is loaded and used as a reuse camera. You can also do it.

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.

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

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 the main constituent members of the camera, respectively, 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 which houses the sector is mounted.

The shutter case 11 is fixed by engaging claws 11A projecting on 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 for engaging with a guide pin 11B is provided. Covered by lens presser 13.

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.

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, which are 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, the objective lens 21 of the finder is dropped in front of the front cover 20 and fixed by the engagement of the 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 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 on the front surface of the camera body 10, a nail 10F, and a side engaging portion 10G. 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 inside 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 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.

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.

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

In the camera body 10, a cartridge chamber 15 is provided as two accommodating 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 used in the present camera of this embodiment is a roll film J135 or a slightly thin roll film having a thickness of 130 to 140 .mu.m, which is used as a general camera. The end portion is fixed to S1 and the film is wound up for a predetermined number of frames so that the film can be photographed, and a film of a certain length has come out 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 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, 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, the tip of the film F 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 made light-tight.
Then, this camera in this state is attached to the film winding device, and the entire film F (with the other end not separated from the spool S1 of the cartridge P1) is moved to the scroll chamber 15B.
The film is loaded by winding the film on the spool S2. 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 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 is a film winding knob, and the film F loaded as described above is wound up by rotating 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 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 the rising portion 65B is eventually overcome to charge the sector charge mechanism 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 and the groove 55A of the cam 55 returns to the initial position by the film winding, the spring force for biasing the cam stopper 62 by the horizontal end portion of the charge lever spring 64 in the clockwise direction. As a result, the protruding portion 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.

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 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 filmable 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 two frames of film are wound up in an idle manner, 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 a horizontal cross section of this camera by the AA cross section in FIG.

The image frame 16 of the camera body 10 is formed into a curved surface having a curvature R = 110 to 130 mm centered on the optical axis XX of the camera, and the rear surface of the image frame 16 is along the curved surface. Also, a pair of rail surfaces 10M are provided so as to project. Conventionally, R
Although it was about 250 mm, it is necessary to reduce the focal length f of the lens in order to make the entire camera thin. As a result, the lens becomes a relatively wide-angle lens, so aberrations are likely to occur in the periphery. In order to prevent this as much as possible and to obtain a high-quality photograph, the film surface was curved more. In this embodiment, the lens has f = 30 m / m.

The film F wound on the spool S2 is
When the film winding knob 51 shown in FIG. 3 is rotated, the photosensitive surface of the film winding knob 51 is slidably transferred from the flat surface portion 10N provided at one end of the screen frame 16 to the rail surface 10M. After being exposed to the light, the cartridge is housed inside the cartridge P1.

BB is provided at both ends of each rail surface 10M.
As shown in FIG. 6 showing a cross section, a plurality of raised portions 30E (film F
The rib-shaped guide member extending in the feeding direction) partially abuts against both side edges of the film F against the rail surface 10M. Only in the portion corresponding to the BB cross section and the inlet portion entering the scroll chamber 15B, the force for pressing the film toward the main body side (rail surface, horizontal portion) is greater than the portion facing the other image frame.

On the other hand, as shown in FIG. 7 showing the CC cross section of the spool S2, the shaft end S2A below the spool S2 has a back cover.
The elastic pressing portion 30F formed on 30 is in pressure contact, so that the rotation of the spool S2 is braked by an appropriate frictional force.

When the spool S1 in the cartridge P1 is rotated counterclockwise by the rotation of the film winding knob 51, the film F wound on the spool S2 is spooled in the so-called cartridge by braking the rotation of the spool S2. The feeding is started in a state in which a proper tension is applied from the close-wound state without being in the "bully-wound" state in S1, and the screen frame is displayed.
Transferred to 16.

The film F to which the tension is applied is further strongly pressed by the raised portion 30E in the flat surface portion 10N to be in a strong tension state, and is biased so as to evenly adhere to the curved rail surface 10M. It is in a state of sliding contact.

Therefore, by setting the focal plane of the photographing lens 12 on the rail surface 10M, the photosensitive surface of the film F is always positioned correctly with respect to the focal plane regardless of the thickness of the film base. The Rukoto.

After the exposure, the film F passing through the screen frame 16 has a raised portion which comes into contact with the other end of the rail surface 10M again.
Since 30E is pressed, even if the winding diameter of the spool S1 in the cartridge P1 gradually increases, the position of the photosensitive surface of the film F with respect to the rail surface 10M does not fluctuate and is always accurately maintained with respect to the focal plane. It

In this embodiment, the pressing portion 30F is used.
Although the example is shown in which it is formed on the back cover 30 side, it may be provided on the camera body 10 or the front cover 20 side depending on the configuration of the camera. Further, it may be converted into another back cover having a pressing portion adapted to give different braking force depending on the film thickness used.

[0066]

According to the present invention, even if a simple photographing lens is used, its aberration can be corrected, and the photosensitive surface can be accurately stabilized with respect to the focal plane regardless of the type and thickness of the film. As a result, a film unit with a lens that can obtain high-quality photographs has been 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 a perspective view of a film loaded in the unit.

FIG. 5 is a horizontal sectional view of the unit.

FIG. 6 is a sectional view of an essential part of the unit.

FIG. 7 is a cross-sectional view of a main part of the unit.

[Explanation of symbols]

 10 Camera body 10M Rail surface 10N Flat surface 12 Photographing lens 16 Screen frame 20 Front cover 30 Back cover 30E Raised part 30F Pressed part 51 Film winding knob F Film S1, S2 Spool

Claims (2)

[Claims] 1. A lens-equipped film unit preloaded with an unexposed film capable of taking a photograph by means of a built-in exposure and film feeding means, and a film to be loaded into the unit is a photosensitive surface of the unit. A film unit with a lens, which is characterized in that it is fed along the focal plane of the taking lens. 2. A lens-equipped film unit preloaded with an unexposed film capable of taking a picture by means of a built-in exposure and film feeding means, wherein rotation of a spool around which the film preloaded in said unit is wound is restricted. A film unit with a lens, which is provided with a member for applying power.