JPH05210151A - Film unit with lens - Google Patents

Abstract

PURPOSE:To minimize the increase of the overall thickness of a camera, accompanied with the correction of a position for housing a film, when a picture frame is formed with a curved surface, to correct the aberration of a photographic lens. CONSTITUTION:On the assumption that the picture frame 16 of a camera main body 10 is formed with the curved surface so as to place the center of rolling on the optical axis XX of the camera and obtain a curvature R1, one side edge of the picture frame 16 is made into a plane part 10N perpendicular to the optical axis XX, and the position of a scroll room 15B housing the film F is set so that the film F wound on a spool S2 is fed from a horizontal direction, with respect to the plain surface 10N.

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.

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, although it is said that the camera is a "shooting-only camera", recently, due to the diversification of the shooting purpose, there is a tendency that a stroboscopic light emitting device is built in or the camera function is advanced, and therefore the cost is reduced. Rising and increasing camera size are inevitable.

As a result of solving these problems and improving the present invention, as a result of the simplification of the mechanism of the camera and the utilization of space, it is possible to suppress the cost increase and the size increase of the camera, and particularly to provide a thin film unit with a lens. It is intended for.

[0006]

The above object is to provide a lens-fitted film unit capable of taking a picture of an unexposed film preloaded by a built-in exposure and film feeding means, and a screen frame of the unit is A lens-equipped film unit and a strobe unit, characterized in that a scroll chamber, which is formed with a convex curved surface on the rear side of the unit, is provided so as to recede to the rear side of the unit to accommodate a film to be fed to the screen frame. In a film unit with a lens, which has a built-in exposure and film feeding means and is capable of taking a picture of an unexposed film preloaded, a screen frame of the unit is formed with a convex curved surface on the rear side of the unit. The side edge of the screen frame facing the scroll chamber accommodating the film to be fed to the optical axis of the unit. It is achieved by the lens-fitted photographic film unit, characterized in that formed in the straight planar section.

[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 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.

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 clockwise by the spring force of the hoisting stopper spring 58, but the arm portion 61A of the charge lever 61 is
It is stopped by the end face of A and stops, and the V-shaped projection at the tip of the hoisting stopper 57 does not lock the ratchet gear 51A of the hoisting 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 formed in the groove 55 of the cam 55.
Jumping to A, the winding stopper 57 is disengaged, and the winding knob 51 is locked by the winding stopper 57, so that the film cannot be wound. And as mentioned above, the charge lever
Since the movement of 61 is blocked, the film cannot be exposed. In this way, the leading edge of the film is prevented from being caught in the cartridge.

FIG. 5 (a) shows a horizontal section of the camera body 10 along the arrow AA in FIG. 2, and FIG. 5 (a) shows the main part thereof.

In the figure, 15A and 15B are the above-mentioned patrone chamber and scroll chamber, and 16 is the screen frame of the camera.

As in the present embodiment, the taking lens is f = 30 mm in order to make the camera thin, and the screen frame 16 is rotated on the optical axis of the camera for the purpose of correcting the spherical aberration of the taking lens 12. The unexposed film F, which is formed on the curved surface with the curvature R1 centering on the center of the spool S1 and is wound around the spool S2, slides on the set of rail surfaces 10M protruding to the back side along the curved surface. And is fed to the focal plane (screen frame centered on the optical axis).

In order to stabilize the film F on the focal plane, it is necessary to feed the film F to the screen frame 16 without largely bending, and (the film surface along the rail surface from the spools S1 and S2 is not bent, (It is necessary that it is uniformly on the circumference of R that is convex in the rear direction of the camera.) Therefore, when the screen frame is formed with a curved surface, the unexposed film F is generally formed as shown in FIG. The spool S2 to be wound must be positioned in the direction of the arrow B, that is, closer to the front side of the camera corresponding to the size of the curvature R, so that the cartridge chamber or the scroll chamber approaches the front side of the camera. The camera thickness tended to increase significantly.

Therefore, in the present invention, as shown in FIG. 5, a plane portion 10N perpendicular to the optical axis XX is formed on the side edge of the screen frame 16 on the scroll chamber 15B side, and the film F is placed horizontally with respect to the plane portion 10N. It is configured to feed from the direction to the rail surface 10M. The alternate long and short dash line shown in FIG. 5 (a) indicates a surface imaginary to the film pressing surface on the camera back cover side.

The film F fed to the flat surface portion 10N is reasonably fed to the above-mentioned curved surface only by passing through an extremely small inflection point to maintain a stable position with respect to the rail surface 10M. Can be done. In addition, a part of the pressing surface from the back cover (shown by the alternate long and short dash line) is lightly abutted on the flat surface portion through the film. Even if the film is thin with an appropriate tension, the rail surface 10M is To adhere.

Therefore, by forming the flat portion 10N, the scroll chamber 15B can be set back to the rear side of the camera, and in the conventional lens-equipped film unit, the curvature R1 of the curved surface is other than the lens portion of the camera. However, according to the present invention, it is not necessary to increase the camera thickness even if the curvature R1 is reduced to around 110 mm, and as a result, spherical aberration is sufficiently corrected. It is also possible to get a space to install the strobe unit 40.

Although the scroll chamber 15B side has been mainly described in the above embodiment, the present invention can be similarly applied to the patrone chamber 15A side.

Each numerical value (unit: mm) shown in FIG. 5 uses the patrone P1 and the spool S2, and the screen frame 16
FIG. 7 shows an example of setting of each main feature constituting the camera body 10 when the curvature R1 of the curved surface is 110 mm.

Although the present invention is more effective with a thin film, a photographic film having a normal thickness and a normal film cartridge can be used.

[0066]

According to the present invention, a thin camera can be obtained by forming the screen frame of the unit with a convex curved surface on the rear side of the unit and retreating the scroll chamber to the rear side of the unit. By making the side line facing the scroll chamber containing the film to be fed of the screen frame a plane perpendicular to the optical axis, the flatness of the film is stable and good images can be obtained, while maintaining the compactness of the camera while maintaining the image quality. As a result, improvements and built-in strobe units have been realized, and as a result, it has become possible to provide a film unit with a lens that has high performance and can be used in a variety of applications and has excellent practicality.

[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 an exploded perspective view showing a mechanical portion of the unit.

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

FIG. 5 is a cross-sectional view showing a relationship between a screen frame and a scroll chamber.

FIG. 6 is an explanatory diagram showing a relationship between a screen frame and a scroll chamber.

[Explanation of symbols]

 10 Camera body 10M Rail surface 10N Flat surface 15A Patrone chamber 15B Scroll chamber 16 Screen frame 20 Front cover 30 Back lid 40 Strobe unit 42 Substrate 50 Film winding mechanism 60 Sector charge mechanism 70 Film counter mechanism P1 Patrone S, S2 Spool F film R, R1 curvature

Claims (2)

[Claims] 1. A lens-equipped film unit capable of taking a picture of an unexposed film pre-loaded by a built-in exposure and film feeding means, wherein a screen frame of the unit has a convex curved surface on the rear side of the unit. A lens-equipped film unit, characterized in that a scroll chamber, which is formed with the film, is housed in the screen frame and is retracted to the rear side of the unit. 2. A lens-fitted film unit that enables photography of an unexposed film preloaded by an internal exposure and film feeding means, and a screen frame of the unit has a convex curved surface on the rear side of the unit. A lens-equipped film unit, characterized in that a side edge of the screen frame facing a scroll chamber for accommodating a film to be fed is formed in a plane portion perpendicular to an optical axis of the unit.