JP2591327Y2 - Film unit with lens - Google Patents

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 having an exposure and film winding function and capable of taking a picture immediately on a previously loaded unexposed film.

[0002]

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

[0003] Cameras are often purchased and used on the go when traveling or the like. However, it is hard to say that the camera is convenient to carry, and the camera has a photographic lens of f = 35 mm and the outer shape is 110 mm x 60 m.
Approximately 35 mm in size, it was inconvenient without getting into the shirt chest.

[0004]

[Problems to be Solved by the Invention] However, despite the fact that it is a "camera-clear camera", camera functions have become more sophisticated as in the case of a lens-equipped film unit with a built-in strobe light emitting device due to the recent diversification of shooting purposes. There is a tendency to increase costs and increase the size of cameras. Furthermore, from the idea of reusing resources,
There is also a demand for a “camera-clear camera” to be a reusable camera, that is, a reuse camera.

The present invention solves these problems and improves the results. As a result, simplification of the mechanism of the camera and utilization of space suppress the increase in the cost and the size of the camera, and clear photography without flare. It is an object of the present invention to provide a small-sized film unit with a lens that performs the following.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to provide a film unit with a lens which is pre-loaded with an unexposed film and which exposes the unexposed film by exposure means. A part of the light beam passing through the photographing lens and entering the inner edge of the opening of the screen frame out of the light beam that passes through the photographing lens and is focused on the film surface on the inner surface of the light-shielding cylinder interposed between This is achieved by a film unit with a lens, characterized in that a diaphragm member is provided at a position where light is blocked, and a part of a peripheral light flux passing near the inner edge of the opening of the screen frame and condensed on the film surface is blocked. Further, the aperture member and the light shielding cylinder may be formed separately, and the aperture member may be fixed in the light shielding cylinder from the screen frame side.

[0007]

FIG. 1 shows the appearance of a film unit with a lens of the present invention (hereinafter also referred to as the present camera), that is, a film-integrated camera. The camera is pre-loaded with 35 mm film (J135) and sold. After the shooting, the film is sent to the maker without being rewound, and is developed and printed.

[0008] The unexposed film used in the camera is loaded in a state in which the film is inserted into the patrone. After the camera is made light-tight, the winding shaft on the film winding chamber side is driven to drive the film in the patrone. The entire film is wound into a film winding chamber.
The user winds up the film that has been shot in the patrone by winding the film each time shooting is performed.
Therefore, on the maker side, the photographed film can be taken out of the camera as a patrone in the light room.

The photographed film can be easily taken out by bending a part of the back cover. Therefore, if the back cover is replaced, a new unexposed film is loaded and reused, that is, used as a reuse camera. You can do it.

As the patrone loaded in the camera, a patrone having an outer diameter of φ20.6 mm different from a commonly used patrone (JIS K7528) is used.

As a result, the thickness of the camera can be suppressed to about 24 mm except for a lens barrel having a photographing lens, thereby realizing an ultra-thin compact camera.

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

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

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

When the camera body 10 is used alone, the film winding mechanism 50, the sector charging mechanism 60, and the members constituting the film counter mechanism 70 are mounted, and a shutter case 11 for accommodating a sector is mounted.

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

Further, on the front surface of the shutter case 11, a photographing lens 12 having a focal length f = 30 mm and having a stop of F9.5 and a single lens having a focal length f = 30 mm is provided, and a slide 13A is engaged with a guide pin 11B. Covered by the lens holder 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 board which engage with guide pins 10B and 10C on the front of the camera body 10, respectively.

In the strobe unit 40, the upper and lower battery pieces 41 are inserted into the upper and lower slit holes 10D of the camera body 10 to protrude into the battery chamber on the back of the camera body 10 so that AA batteries E as a strobe charging power source are provided. Sandwich.

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

The lens holder 13 and the strobe unit 40
Is fixedly integrated with the camera body 10 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 on the front surface of the front cover 20 in advance and fixed by the engagement of the decorative cover 22. The makeup cover 22 has a guide pin 22A and four claws 22B on the back.
With holes 20A and 4 on the front of the front cover 20, respectively.
It is engaged with the locking portion 20B at the location and is attached.

The front cover 20 is further mounted on the front surface of the camera body 10 after engaging and mounting an eyepiece 23 of a finder on the rear surface.

The front cover 20 has a hole 20C, a claw 20D, and three locking portions 20E on the rear surface, and a guide pin 10E, a claw 10F on the front surface of the camera body 10, and a locking portion 10G on the side. Engage and attach.

The engagement of the front cover 20 with the camera body 10 fixes the lens holder 13 and the flash unit 40 to the camera body 10.

The camera body 10 with the front cover 20 attached
The cartridge P15 and the spool S2 with the leading end of the unexposed film F are respectively loaded in a cartridge chamber 15A and a scroll chamber (film winding chamber) 15B formed on the back surface.

The other end of the film F is locked on a spool S1 in the patrone P1, and even if the film in the patrone is once wound up by the spool S2 after the film is loaded, the other end is locked on the spool S1. Therefore, it can be wound into the patrone P1 every time the photographing is completed.

A back cover 30 is attached to the back of the camera body 10 loaded with the film F, so that the light shielding of the film F and the restriction on the focus surface position are maintained.

The back cover 30 has claws 30A and 30B on its front surface and locking holes 30C and 30D on its side surface.
The claw 30A and 30B are the locking parts of the camera body 10
Holes 30C and 30D on the other hand are 10H and 10J,
K and 10L are engaged and fixed.

After the back cover 30 is mounted, a predetermined film winding operation is performed to set an image-capturable screen, and the screen is completed by mounting the carton shown in FIG.

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

FIGS. 3 and 4 show the above-mentioned respective mechanisms at angles viewed from the rear side of the camera.

The camera body 10 has a patrone chamber 15 as two storage chambers for film winding and film loading in the same plane on both sides of a screen frame 16 as an exposure unit.
A and a scroll chamber 15B are provided, and a J135 film F wound around a patrone P as a storage container shown in FIG. 4 is loaded.

The film F used in the camera of the present embodiment is a roll film J135 or a slightly thin roll film of 130 to 140 μm like a general camera, and a spool of the patrone P1 in a dark room or the like in advance using a patrone as a storage container. The end portion is fixed to S1, and a predetermined number of frames are wrapped in a length that can be photographed, and a film of a certain length comes out from the film drawer of the cartridge P1. The film in this state is loaded into the camera. The loading method will be described below.

The patrone P1 is loaded into the patrone chamber 15A such that the spool S1 of the patrone P1 engages with the fork of the hoisting fork 52. On the other hand, the spool S2 is also inserted into the scroll chamber 15B. Then, the tip of the film notch FN of the film F is positioned at the index 17 below the lower rail surface.
The film F is pulled out until it conforms to A, the leading end 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 put on the back cover 30 to make the cover light-tight.
Then, the camera in this state is attached to the film winding device, and the entire film F (with the other end not being detached from the spool S1 of the cartridge P1) is moved to the scroll chamber 15B.
And the loading of the film is completed. That is, by loading the film F in this manner, the film F is sequentially wound into the patrone P1 for each photographing operation. The photographed film is wrapped in the patrone P1, leaving the required length without the roll wrapped in the patrone. Therefore, this patrone can be taken out of the camera in a bright room.

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

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

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

Reference numeral 51 denotes a film winding knob. The film F loaded as described above is wound by turning the film winding knob 51 counterclockwise. A cam 55 coaxial with an eight-tooth sprocket gear 54 meshing with the perforation P of the film F and having a fan-shaped cam portion 55B at the bottom.
Is rotated exactly one turn in the counterclockwise direction by winding the film.

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

The rotation of the cam 55 in the counterclockwise direction naturally rotates the sector cam portion 55B in the counterclockwise direction as described above, and in the process, the charge lever 61 is moved by the sector cam portion 55B to the charge lever shaft 63. Is rotated clockwise against the spring force of the charge lever spring 64 that urges in the counterclockwise direction with the rotation axis as a rotation axis, and the rising portion 65B of the sector lever 65 is rotated by the triangular ketobashi 61C provided on the charge lever 61.
Is pressed, and eventually the vehicle gets over the rising portion 65B to charge the sector charging 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 on the sector lever 67.
The left end of the long hole is brought into contact with a pin 18B provided on the camera body 10 that guides the long hole slidably and rotatably, and the sector lever
The arm plate 65D provided on the camera body 10 is provided with a pin 18 provided on the camera body 10.
It comes into contact with E. A sector drive pin 65A for operating a sector 66 pivotally supported by a sector pin 18D provided on the camera body 10 is inserted into the fork of the sector 66.

As will be described later, the cam stopper after photographing is completed
The protrusion 62D of 62 is pulled out from the groove 55A of the cam 55,
The arm portion 57A of the hoisting stopper 57 changes from the state shown in the figure to change the arm portion 61A of the charge lever 61 and the arm portion of the cam stopper 62.
It comes off from each edge of 62A, and is in contact with the end face of the arm 61A by the spring force of the hoisting stopper spring 58 that urges clockwise. When the cam 55 rotates just once by the film winding as described above and the groove 55A of the cam 55 returns to the initial position, the spring force for urging the cam stopper 62 by the horizontal end of the charge lever spring 64 in the clockwise direction. As a result, the projection 62D of the cam stopper 62 jumps into the groove 55A. By this jumping operation, the locking of the arm portion 57A of the hoisting stopper 57, which has been locked on 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 end of the winding stopper 57 is released by the release of the lock so that the ratchet gear is actuated by the spring force of the winding stopper spring 58. The film winding knob 51 jumps into the tooth space of the gear 51A, thereby preventing 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 rotating further.

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

When the release button 25 of the front cover 20 is pressed, a release button pin 25A implanted on the back of the release button 25
Operates in the direction of arrow A. That is, the front cover 20
When the camera is attached to the camera body 10,
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, the arm portion of the charge lever 61 is moved from the end surface of the arm portion 57A of the hoisting stopper 57.
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.

When the charge lever 61 is rotated counterclockwise, the charge lever 61C of the charge lever 61
The rising portion 65B of the sector lever 65 is hit and comes off 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 returns to the original position due to the tensile force of the sector spring 67. Therefore, the sector drive pin 65A rotates the sector 66 about the sector pin 18D to expose the film and close it.

On the other hand, the cam stopper 62 also rotates counterclockwise together with the charge lever 61, as described above.
The projection 62D of 62 comes out of the groove 55A of the cam 55. Therefore, even if you stop pressing the release button,
The arm portion 57A of the charge lever 61 is urged clockwise by the spring force of the hoisting stopper spring 58.
Is stopped by the end face of
The projection 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 engages with the V-groove 56A provided at the upper end of the cam shaft 56 implanted in the cam 55 which rotates integrally with the sprocket gear 54. Reference numeral 56 denotes an index gear that rotates clockwise by one tooth for each rotation.

An index plate 71 is printed on the upper surface of the index plate gear 72 as an integrally formed product, and the remaining number of shootable films is displayed from the film counter window 26 on the upper surface of the front cover 20.

A projection 72A is provided on the lower surface of the index platen gear 72, and when the film is wound up after a predetermined number of frames have been photographed, the projection 72A is brought into contact with the projection 61 of the charge lever 61.
E and another protrusion 62 </ b> E of the cam stopper 62, so as to break and enter. Then, the protruding portion 72A is connected to both the protruding portions 61.
The film is wound up by one frame by entering between E and 62E, and even when the cam 55 rotates once and the charging of the sector is completed, the two projecting portions 61E and 62E are brought into contact with the projecting portion 72A of the index wheel gear 72. The movement is blocked, the charge lever 61 cannot be operated, and the protrusion 62D of the cam stopper 62 is also in the groove of the cam 55.
You will not be able to jump into 55A. The arm portion 57A of the hoisting stopper 57 abuts on the end surface 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 impossible to operate the charge lever 61 to open and close the sector to expose the film.

When two frames of film are wound up in this way, the index wheel 72 rotates by two teeth.
By this rotation, the projection 72A of the index plate gear 72 still holds the projection 61E to prevent the movement of the charge lever 61, but comes off the projection 62E of the cam stopper 62. Therefore, the protrusion 62D is formed in the groove 55A of the cam 55.
And the locking of the hoisting stopper 57 is released and the hoisting stopper
The winding knob 51 is locked by 57, and the film cannot be wound. Since the movement of the charge lever 61 is blocked as described above, the film cannot be exposed. In this way, the leading end of the film is prevented from being caught in the cartridge.

FIG. 5 is a longitudinal sectional view showing the configuration of the photographing optical axis portion of the present camera. As described above, the shutter case 11 has the photographing lens 12 and the lens holder 13 mounted on the front surface, and the shutter case 11 on the rear surface. Hold the sector 66 and hold the sector
14 are engaged and integrated.

The shutter case 11 is integrated with the engaging portion 10A of the camera body 10 by engaging the claw 11A shown in FIG. The rear end of 14 is inserted and pressed into the front end of a rectangular light-shielding tube 10R protrudingly formed on the camera body 10 to make the inside of the light-shielding tube 10R light-tight.

Also, by integrating the shutter case 11 and the camera body 10, the focus of the photographing lens 12 automatically matches the rail surface 10M of the camera body 10, and
An image of the subject is formed on the film F in contact with 10M.

As described above, a short focal length lens of f = 30 mm is used as the photographing lens 12 of the present camera, so that the amount of projection of the photographing lens portion is small and the camera is compact.

The inner surface of the light-shielding tube 10R has a roughness of 10 μm to 25 μ, which is several times the normal roughness, in order to prevent internal reflection due to the use of a short focus lens.
It is a black mat surface having an uneven surface with a roughness of m.

Further, as shown in FIG. 6, a thin plate-shaped diaphragm member 10S, which has been subjected to a black matting process, is attached to the intermediate position of the inner surface of the light shielding tube 10R by means such as bonding.

The aperture member 10S is used for photographing as shown in FIG.
Shielding tube 10 interposed between shadow lens 12 and screen frame 16
R, which is provided on the inner surface of
Passing through the intersection of the point and the optical axis toward the inner edge of the opening of the screen frame 16
It is placed at a position where it blocks the light beam that has been incident once, thereby effectively blocking a part of the light beam around the taking lens 12 and effectively reducing harmful reflection of unnecessary light that is incident on the inner wall of the light-shielding tube 10R close to the screen frame 16. Has been prevented.

The light amount around the screen by the photographing lens 12 is sufficiently large in the single lens configuration as compared with a general photographic lens. There is almost no problem in practical use.

The aperture member 10S also acts to shield a part of the peripheral light beam entering the screen frame 16 in the horizontal direction.

Further, in order to reduce the amount of unnecessary light incident on the inner wall of the light shielding tube 10R, the opening 13B of the lens holder 13 is rectangular or barrel-shaped corresponding to the screen frame 16 as shown in FIG. Accordingly, a method of minimizing the luminous flux of unnecessary light that is incident in the vertical and horizontal directions around the screen frame 16 is adopted.

[0066]

According to the present invention, there is provided a film unit with a lens capable of taking a high-quality photographic image with a low internal reflection and a high contrast while using a photographic lens having a short focal length for compactness. It was decided.

[Brief description of the drawings]

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

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

FIG. 3 is an exploded 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 longitudinal sectional view showing a main part of the unit.

FIG. 6 is a perspective view of a diaphragm member.

FIG. 7 is a perspective view of a lens holder.

[Explanation of symbols]

 10 Camera body 10M Rail surface 10R Light shielding tube 10S Aperture member 11 Shutter case 12 Photographing lens 13 Lens holder 13B Opening 14 Sector holder 16 Screen frame 66 Sector F film

Claims (2)

(57) [Scope of request for utility model registration] 1. An unexposed film is loaded in advance,
In a film unit with a lens for exposing the unexposed film to light by an exposure means, an inner surface of a light-shielding cylinder interposed between a photographing lens of the unit and a screen frame passes through a photographing lens and condenses on a film surface. A diaphragm member is provided at a position to block a part of the light flux passing through the photographing lens and entering the inner edge of the opening of the screen frame out of the light flux to be collected, and passing through the vicinity of the inner edge of the opening of the screen frame to collect on the film surface. A film unit with a lens, characterized in that a part of the illuminated light beam is blocked. 2. A film unit with a lens according to claim 1, wherein said aperture member and said light-shielding cylinder are formed separately, and said aperture member is fixed in said light-shielding cylinder from said screen frame side. .