JPH0564839U - Film unit with lens - Google Patents

Abstract

(57) [Abstract] [Purpose] The internal reflection is prevented by suppressing the reflection of unnecessary light incident on the periphery of the screen and reducing the amount of the unnecessary light. [Structure] An inner wall of the light-shielding cylinder 10R of the camera body 10 has a matte surface of 10 μm to 25 μm, which is coarser than usual, and a thin plate-shaped diaphragm member 10S is provided at an intermediate position to cut a part of peripheral light amount of the screen frame 16. By mounting at the position, unnecessary light reflected by the inner wall of the light shielding tube 10R is prevented from reaching the screen. In addition, the opening 13B of the lens retainer 13 is formed in a rectangular shape corresponding to the screen frame 16 so as to limit the amount of unnecessary light incident on the photographing lens 12.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 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]

[Prior Art]

 The film unit with lens is a so-called film-integrated camera equipped with the function of taking a picture, which is also called a "shoot-and-shoot camera". It is well known that it can be used to shoot a single loaded film. It is used only and the camera body is discarded after taking out the exposed film, so it is manufactured at a low cost with a simple structure.

[0003] Although a camera is often purchased and used on the go while traveling, it is hard to say that it is convenient to carry, and it has a shooting lens of f = 35 mm and an outer shape of 110 mm × 60 mm × 35 mm. However, I was inconvenient because I could not fit into the chest of my shirt.

[0004]

[Problems to be solved by the device]

 However, even though it is called a “shoot-and-shoot camera,” due to the recent diversification of shooting purposes, there is a tendency for camera functions to become more sophisticated, as in the case of a lens-equipped film unit with a built-in stroboscopic light emitting device, which increases costs. Increasing camera size is inevitable. Furthermore, from the perspective of reusing resources, there is a growing demand for a camera that can be reused, that is, a camera that can be reused.

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 the space, it is possible to suppress the increase in cost and the increase in size of the camera, and there is no flare, etc. It is intended to provide a small-sized film unit with a lens for shooting.

[0006]

[Means for Solving the Problems]

 In the film unit with a lens capable of taking a photograph on the unexposed light film preloaded by the built-in exposure and film feeding means, the above-mentioned object is to prevent light shielding between the photographing lens of the unit and the screen frame. This is achieved by a lens-equipped film unit characterized in that at least a lower surface of the inner surface of the cylinder is provided with a diaphragm member which blocks a part of a peripheral light flux of the photographing lens.

[0007]

【Example】

 FIG. 1 shows an external view 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 (J 135) and sold. The film is sent to the maker side without being rewound, and is developed and printed.

The unexposed film used in this camera is loaded in a cartridge, and after the camera is kept in a light-tight state, the take-up shaft on the film take-up chamber side is driven to drive the patrone. All the film inside is wound up in the film winding room. The user is able to wind up the film that has already been photographed into the patrone by winding it up each time the photograph is taken. Therefore, on the maker side, the film that has been taken can be taken out from the camera in the bright room as a patrone.

Further, the taken film can be easily taken out by bending a part of the back cover, and therefore, if the back cover is replaced, a new camera that is not exposed to light is reused, that is, a reuse camera. It can also be used as

As the cartridge loaded in the camera, a cartridge having an outer diameter of φ20.6 mm, which is different from a cartridge (JIS K7528) that 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 present camera is provided with a cardboard carton 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 configuration of the camera.

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

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 that houses the sector is mounted.

The shutter case 11 is fixed by engaging claws 11 A protruding on both sides with a locking portion 10 A 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 with a single lens having a focal length f = 30 mm and an aperture of F9.5 is dropped, and a sliding slit 13A engaging with a guide pin 11B is provided. It is covered by the lens presser 13 provided.

The camera body 10 and the shutter case 11 are 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 with reference to holes 40A and 40B on the substrate which engage with the guide pins 10B and 10C on the front surface of the camera body 10, respectively.

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

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

The fixation of the lens retainer 13 and the strobe unit 40 to 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 cosmetic cover 22 has a guide pin 22A and four claws 22B projecting from the rear surface thereof, and is attached by engaging with holes 20A on the front surface of the front cover 20 and four locking portions 20B, respectively.

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

The front cover 20 is provided with a hole 20C, a claw 20D and three locking portions 20E on the back surface, and each of them is provided with a guide pin 10E, a claw 10F and a side locking portion 10G on the front of the camera body 10. 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 mounted thereon has a cartridge chamber 15A and a scroll chamber (film take-up chamber) 15B formed on the back surface thereof, and a spool in which the tips of the cartridge P1 and the unexposed film F are locked, respectively. S2 is loaded.

The other end of the film F is locked to the spool S1 in the cartridge P1. Even if the film in the cartridge is once 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 each time the shooting is completed.

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

The back cover 30 is provided with claws 30A and 30B on its front surface and locking holes 30C and 30D on its side surfaces. When the back cover 30 is mounted on the camera body 10, the claws 30A and 30B are engaged with the camera body 10. One holes 30C and 30D are fixed to the stoppers 10H and 10J by engaging with the claws 10K and 10L of the camera body 10.

After the back cover 30 is mounted, a predetermined film winding operation is performed to set a screen capable of photographing, 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 respective mechanical units described above at an angle when viewed from the rear side of the camera.

The camera body 10 has a cartridge chamber 15A and a scroll chamber 15B 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. The J135 film F, which is provided and is wound in the cartridge P which is the storage container shown in FIG. 4, is loaded.

The film F used in this camera of this embodiment is a roll film J135 or a slightly thin roll film having a thickness of 130 to 140 μm, which is the same as a general camera. The end of the spool S1 is fixed and the spool S1 is wound up for a certain number of frames so that the film can be photographed, and a film of a certain length has come out of the film outlet of the cartridge P1. The film in this state will be loaded into the camera, but the loading method will be described below.

The cartridge P1 is loaded into the cartridge chamber 15A so that the spool S1 of the cartridge P1 is engaged with the fork 52 of the hoisting fork 52. Meanwhile, the spool S2 is also inserted into the scroll chamber 15B. Then, the film F is pulled out until the tip of the film notcher FN of the film F is aligned with the index 17A on the lower side of the lower rail surface, and the tip of the film F is inserted into the slit SL of the spool S2 to nail the perforation P of the film F. H is hooked.

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 entire film F (however, the other end does not separate from the spool S1 of the cartridge P1) is wound on the spool S2 of the scroll chamber 15B to load the film. Will end. That is, by loading the film F in this way, the film F is sequentially wound into the patrone P1 at each shooting, and when the predetermined number of shootings are completed and two films are fed in advance, the film F The leading end of F is not wound in the cartridge, and the film having been photographed is wound in the cartridge P1 while leaving a necessary length. Therefore, this patrone can be taken out from this camera in a bright room.

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

The camera body 10 incorporates the film winding mechanism 50 including the photographing lens 12, a sector charge mechanism 60, and a film counter mechanism 70 as main components.

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

Reference numeral 51 denotes a film winding knob, and the film F loaded as described above is wound up by rotating the film winding knob 51 counterclockwise. The cam 55, which has a fan-shaped cam portion 55B at the lower part, which is coaxial with the sprocket gear 54 having eight teeth and which meshes with the perforation P of the film F, is adapted to rotate exactly once counterclockwise by winding the film. There is.

That is, the film is wound up with one per piece having the 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 to the charge lever shaft. It rotates clockwise against the spring force of the charge lever vane 64 that urges 63 in the counterclockwise direction as a rotation axis, and the triangular ketobashi 61C provided on the charge lever 61 causes the rising portion of the sector lever 65 to rise. 65B is pressed, and then the rising portion 65B is overcome and the sector charge mechanism is charged as shown in the figure.

A sector bar 67 is stretched between a pin 65C of the sector lever 65 and a pin 18C provided on the camera body 10. The sector spring 67 pulls and slides the slot of the sector lever 65 to rotate it. The left end of the elongated hole is brought into contact with the pin 18B provided on the camera body 10 that freely guides, and the arm plate 65D provided on the sector lever 65 is brought into contact with the pin 18E provided on the camera body 10. There is. Further, a sector drive pin 65A for operating 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 projecting portion 62D of the cam stopper 62 after the shooting is removed from the groove portion 55A of the cam 55, and the arm portion 57A of the hoisting stopper 57 changes from the state shown in the figure to the charge lever. The arm portion 61A of 61 and the arm portion 62A of the cam stopper 62 are disengaged from the respective edges and come into contact with the end face of the arm portion 61A by the spring force of the hoisting stopper spring 58 which urges in the time direction. Then, 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 cam stopper 62 is urged clockwise by the horizontal end of the charge lever spring 64. The protruding spring 62D of the cam stopper 62 jumps into the groove 55A due to the spring force. 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 point, is released.

The outer peripheral cylindrical surface of the film winding knob 51 is a ratchet gear, and the V-shaped protrusion at the tip of the winding stopper 57 is released by the spring force of the winding stopper spring 58 due to the release of the locking. It will jump into the tooth space of the ratchet gear 51A and prevent 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 rotating.

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

When the release button 25 of the front cover 20 is pushed, the tip of the release button pin 25A implanted on the back surface of the release button 25 operates in the direction of arrow A. That is, when the front cover 20 is attached to the camera main body 10, the hoisting stopper 57 acts on the hoisting stopper spring 58 by the operation of the tip of the release button pin 25A in the direction of arrow A shown on the hoisting knob 51 in the figure. It rotates counterclockwise against the spring force. Then, the edge of the arm portion 61A of the charge lever 61 is disengaged from the end surface of the arm portion 57A of the hoisting stopper 57, and the charge lever 61, and accordingly the cam stopper 62 is rotated counterclockwise by the spring force of the charge lever spring 64. It

By rotating the charge lever 61 in the counterclockwise direction, the above-mentioned ketobashi 61C of the charge lever 61 strikes 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 then returns to its 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 then closes it.

On the other hand, the cam stopper 62 also rotates in the counterclockwise direction together with the charge lever 61 as described above, and the protruding portion 62D of the cam stopper 62 comes out of the groove portion 55A of the cam 55. Therefore, even if the release button is stopped, the arm portion 57A of the hoisting stopper 57 is urged in the clockwise direction by the spring force of the hoisting stopper spring 58, but it is blocked by the end face of the arm portion 61A of the charge lever 61. Then, the V-shaped protrusion at the tip of the hoisting stopper 57 stops the hoisting knob 5.
The ratchet gear 51A of 1 is not locked. Therefore, the next film winding can be performed.

Next, the film counter mechanism will be described.

As described above, 72 meshes with the V groove 56A provided at the upper end of the cam shaft 56 that is planted in the cam 55 that rotates integrally with the sprocket gear 54, and one film 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.

The index plate 71 is printed on the upper surface of the index plate gear 72 as an integrally molded product, and the remaining number of film-capable images 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 plate gear 72, and the projection 72A is separated from the projection 61E of the charge lever 61 and the cam stopper 62 by the next film winding after the photographing of a predetermined number of frames is completed. It is designed so as to break in between the protruding portions 62E of the. When the protrusion 72A is inserted between the protrusions 61E and 62E, the film is wound up by one frame, and even if the cam 55 makes one rotation and the sector charging is completed, the protrusions 61E and 62E are removed. The protrusion 72A of the exponential gear 72 prevents the charge lever 61 from moving, and the protrusion 62D of the cam stopper 62 cannot jump into the groove 55A of the cam 55. 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 bar 58, and the V-shaped projection at the tip of the hoisting stopper 57 engages the ratchet gear 51A. You can't stop it, nor can you actuate the charge lever 61 to open or close the sector to expose the film.

In this way, when the two frames of film are unwound, the index plate gear 72 rotates by two teeth, and this rotation causes the protruding portion 72A of the index plate gear 72 to move the protruding portion 61E. The charge lever 61 is prevented from moving by pressing it, but it can be removed from the protruding portion 62E of the cam stopper 62. Therefore, the projecting portion 62D jumps into the groove 55A of the cam 55, 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. Also, 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 is a longitudinal sectional view showing the structure of the photographing optical axis portion of the camera. The shutter case 11 has the photographing lens 12 and the lens retainer 13 mounted on the front surface thereof and the rear surface of the shutter case 11 as described above. The sector retainer 14 is engaged after the sector 66 is accommodated, and is integrated.

Further, the shutter case 11 is integrated by engaging the claw 11A shown in FIG. 2 formed on the sector retainer 14 with the locking portion 10A of the camera body 10 as described above. The rear end of the presser foot 14 is inserted into the front end of a rectangular light-shielding cylinder 10R projectingly formed on the camera body 10 and pressed against it to make the inside of the light-shielding cylinder 10R light-tight.

Further, by integrating the shutter case 11 and the camera body 10 with each other, the focal point of the photographing lens 12 is automatically aligned with the rail surface 10M of the camera body 10, and the film F contacting the rail surface 10M. An image of the subject is formed on.

As described above, the short-focus lens of f = 30 mm is used as the photographing lens 12 of the present camera, whereby the projection amount of the photographing lens portion is small and the camera is compactly assembled.

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

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

The diaphragm member 10S is placed at a position to block a part of the peripheral light flux incident on the screen frame 16, and thereby the harmful reflection of unnecessary light incident on the inner wall of the light shielding tube 10R close to the screen frame 16 is effected. To prevent it.

Since the amount of light to the periphery of the screen by the photographing lens 12 is sufficiently larger than that of a general photographic lens in the case of a single-lens structure, even if a part of the lens is blocked, the decrease in the amount of light is slight. Yes, practically no problem.

The diaphragm member 10S also acts to block a part of the peripheral luminous flux incident on the screen frame 16 in the lateral direction.

Further, as shown in FIG. 7, the opening 13B of the lens retainer 13 has a rectangular or barrel shape corresponding to the screen frame 16 for the purpose of reducing the amount of unnecessary light itself incident on the inner wall of the light shielding tube 10R. In this way, the luminous flux of unnecessary light incident in the vertical and horizontal directions around the screen frame 16 is minimized.

[0066]

[Effect of the device]

 According to the present invention, there is provided a lens-equipped film unit capable of taking good quality photographic images with low internal reflection and high contrast while using a taking lens with a short focal length for compactness. Became.

[Brief description of drawings]

FIG. 1 is an external perspective view of a lens-fitted film unit 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 vertical cross-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 retainer.

[Explanation of symbols]

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

Claims (3)

[Scope of utility model registration request] 1. A lens-equipped film unit capable of photographing an unexposed film preloaded by an internal exposure and film feeding means, and a light-shielding tube interposed between a photographing lens of the unit and a screen frame. A film unit with a lens, characterized in that a diaphragm member for blocking a part of a peripheral light flux of the photographing lens is provided on the inner surface of the film unit. 2. The light-shielding cylinder is such that at least the lower surface of the inner surface is
2. The lens-equipped film unit according to claim 1, which is a matte surface having a roughness of 10 to 25 [mu] m. 3. The lens-equipped film unit according to claim 1, wherein the photographic lens is provided with a light-shielding frame which covers the light flux of the photographic lens corresponding to the screen frame on the front surface.