JP2005266332A - Film-integrated camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the optical configuration of an exposure device, and to provide a film-integrated camera which achieves simplification and price-reduction. <P>SOLUTION: The film-integrated camera is obtained by attaching an exposure unit 49 to a base of a main body holding a rolled photo film in such a way that the film can freely be wound up. The exposure unit 49 is freely rotatable in a surface perpendicular to a shooting optical axis, and comprises a lens holder 52 in which a pinhole 61 of about 0.5 mm diameter and a diaphragm aperture 62 have been formed, and a lens 54 for tele-shooting mounted on the front face of the diaphragm aperture 62 of the lens holder 52. The exposure unit 49 further comprises a switching mechanism 50 for positioning the pinhole 61 or the lens 54 for tele-shooting on the shooting optical axis by regulating the rotation position of the lens holder 52, and a shutter mechanism for controlling the time of exposure of the photo film 28 to subject light incident along the shooting optical axis. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a film-integrated camera in which an exposure device is attached to a photographic film.

  A film-integrated camera (film unit with a lens), which is a simple one-use camera that anyone can easily take a picture of, is popular. Such a film-integrated camera that is supposed to be used once is configured by attaching an exposure device to a photographic film. The exposure apparatus eliminates as much as possible a mechanism for adjusting exposure conditions such as shutter speed and aperture adjustment, and has a simple structure to achieve simplification and cost reduction.

  On the other hand, in recent years, two types of photographic lenses with different focal lengths and a switching mechanism that can selectively switch between the two types of photographic lenses have been incorporated so that wide shooting and tele shooting can be performed. A film-integrated camera has been devised (for example, see Patent Document 1). An exposure apparatus for a two-optical-system switching type film-integrated camera described in Patent Document 1 includes a wide photographing lens composed of two lenses and a single-lens telephoto photographing lens, and a switching operation can be performed by a switching knob. It is possible.

JP 2001-133870 A

  However, in any of the recent film integrated cameras, the optical configuration of the exposure apparatus is complicated, and the situation is in conflict with the simplification and cost reduction described above.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a film-integrated camera that simplifies the optical configuration of an exposure apparatus and simplifies and reduces the cost.

  The film-integrated camera of the present invention is a film-integrated camera in which an exposure apparatus is attached to a base portion that holds a roll-shaped photographic film so that it can be rolled up. The exposure apparatus includes a pinhole formed on a photographing optical axis. And a shutter mechanism for controlling the exposure time of the photographic film to the subject light incident along the photographing optical axis.

  The film-integrated camera of the present invention is a film-integrated camera in which an exposure device is attached to a base portion that rollably holds a roll-shaped photographic film. The exposure device has an in-plane perpendicular to the photographing optical axis. A lens holder having a pinhole and an aperture opening, a lens mounted on the front surface of the aperture opening of the lens holder, and a rotational position of the lens holder to regulate the pin A switching mechanism for positioning either the hole or the lens on the photographic optical axis, and a shutter mechanism for controlling the exposure time of the photographic film to the subject light incident along the photographic optical axis. It is what.

  The pinhole preferably has a diameter of approximately 0.5 mm. Further, the photographic film preferably has a sensitivity of ISO 1600 or higher.

  In the film-integrated camera according to the first aspect of the present invention, since the lens is excluded from the exposure apparatus, the optical configuration of the exposure apparatus can be simplified, and can be simplified and reduced in price. In the film-integrated camera according to the second aspect of the present invention, the optical configuration of the two-optical system switching type exposure apparatus, which has been conventionally complicated, is simplified, and can be used for simplification and cost reduction.

  In FIG. 1, a film integrated camera 10 according to a first embodiment of the present invention includes an exterior label 11 and a main body 12. The exterior label 11 is stuck around the main body 12. The exterior label 11 is provided with openings for exposing functional parts such as the photographing window 13 and the finder window 14.

  The main body 12 is provided with a shutter button 15 at the upper left end of the upper surface, a winding knob 16 at the left end of the rear surface, a strobe light emission window 17 at the upper right of the front surface, and a strobe charging switch 18 under the strobe charging switch 18. Yes.

  As shown in the exploded view of FIG. 2, the main body 12 includes a front cover 19, a rear cover 20, an exposure unit (exposure device) 21, a strobe unit 22, a main body base 23, and a photographic film cartridge 24 provided therein. Etc.

  The main body base 23 is provided with a cartridge chamber 27 for storing the cartridge 26 on one side of the aperture 25, and a film storage chamber 29 for extracting an unexposed photographic film 28 from the cartridge 26 and storing it in a roll state on the other side. Is provided. The cartridge chamber 27 and the film storage chamber 29 are each formed with an opening on the back side, and the opening is closed by the rear cover 20 after the photographic film cartridge 26 is loaded. An exposure unit 21 is attached to the front side of the aperture 25. On the cartridge chamber 27, a winding knob 16 is disposed. By rotating the winding knob 16 after shooting, one exposed frame of the photographic film 28 is stored in the cartridge 27.

  In the exposure unit 21, a shutter button 15, a finder optical system, a shutter charge mechanism, a shutter mechanism, a film counter mechanism, a film winding mechanism, and the like are incorporated in a base member 30 in which a dark box is formed. The dark box maintains a light-tight space from the photographing opening disposed behind the photographing window 13 to the aperture 25.

  The shutter charge mechanism, the shutter mechanism, and the film winding mechanism include a known sprocket, a shutter drive lever, a locking lever, a shutter blade, and a spring. The sprocket is engaged with the perforation of the photographic film 28, and is rotated following the film transfer. The shutter drive lever is charged from the travel completion position toward the charge position against the bias of the spring by the rotation of the sprocket. The locking lever is also moved by the rotation of the sprocket, and is set to a holding position for holding the shutter driving lever at the charging position when the photographic film 28 is transferred by the length of one frame. When the locking lever is set at the holding position, the locking lever prevents the rotation of the sprocket and the rotation of the winding knob 16.

  The shutter button 15 is provided in a cantilever manner. A pressing rod is integrally provided below the shutter button 15. Then, the pressing rod is displaced by pressing the shutter button 15 and presses a part of the locking lever. As a result, the locking lever rotates from the holding position to the release position to release the holding of the shutter drive lever at the charging position. Thus, the shutter drive lever moves instantaneously from the charge position toward the release completion position by the bias of the spring, and kicks the shutter blade during the movement. Thereby, the shutter blade is reciprocated once and exposure is performed. Then, when the movement of the locking lever to the release position is completed, the rotation prevention of the sprocket and the winding knob 16 is released, and the next film winding is allowed.

  In FIG. 3 showing an exploded view of the exposure unit 21, the dark box 31 formed in the base member 30 is provided with an opening 31a for guiding subject light into the dark box 31 along the photographing optical axis 13a. A shutter blade 32 is disposed on the front surface of the opening 31a so as to be swingable about a shaft portion 30a implanted in the base member 30. The shutter blade 32 swings between a shielding position that closes the opening 31a and an opening position that is rotated clockwise from now on, and is urged toward the shielding position by a spring 32a. A shutter cover 33 is attached to the base member 30 so as to cover the shutter blades 32. On the photographing optical axis 13a of the shutter cover 33, a small hole (pinhole) 34 for photographing through which subject light passes is formed. A transparent and flat protective plate 35 is attached to the front surface of the shutter cover 33 so as to cover the small hole 34.

  FIG. 4 is a schematic sectional view taken along the photographing optical axis 13a. As an example, the distance from the small hole 34 to the photographic film 28 is about 32 mm, and the diameter of the small hole 34 is about 0.5 mm. Further, the shutter mechanism is configured such that the exposure time for one image is about 1/45 seconds. In this case, the F value (aperture value) is about F64. Since the amount of subject light from the pinhole is small compared to the case of using a normal lens, the photographic film 28 requires a highly sensitive ISO 1600 film or a film with higher sensitivity. As described above, the film-integrated camera 10 has a simplified optical configuration of the exposure unit 21 and is provided for simplification and cost reduction.

  FIG. 5 shows a film integrated camera 40 according to the second embodiment of the present invention, and the film integrated camera 40 includes an exterior label 41 and a main body 42. The exterior label 41 is stuck around the main body 42. The exterior label 41 is provided with openings for exposing functional parts such as the photographing window 43, the slot 44, and the finder window 45, and an index T (tele) indicating switching between wide photographing and tele photographing, W (wide) is printed. An opening for exposing each functional part such as the finder window 44 is provided.

  A transparent protective plate covering a pinhole used for wide shooting is exposed at the back of the shooting window 43. At this time, the switching knob 46 is located at the right end in the slot 44. By sliding the switching knob 46 to the left end, the telephoto photographic lens is exposed in the back of the photographic window 43. The main body 42 is provided with the shutter button 15, the winding knob 16, the strobe light emission window 17, and the strobe charging switch 18, which are the same as those in the first embodiment, and are therefore assigned the same reference numerals. doing.

  As shown in the exploded view of FIG. 6, the main body 42 includes a front cover 47, a rear cover 48, an exposure unit (exposure apparatus) 49 provided therein, a strobe unit 22 identical to that of the first embodiment, and a main body. It comprises a base 23, a photographic film cartridge 24, and the like. The configuration of the main body base 23 is as described in the first embodiment, and the main body base 23 is loaded with a photographic film cartridge 24 for storing a photographic film 28.

  In the exposure unit 49, a shutter button 15, a switching mechanism, a release lock mechanism, a finder optical system, a shutter charge mechanism, a shutter mechanism, a film counter mechanism, a film winding mechanism, and the like are incorporated in a base member 30 in which a dark box is formed. It is. The shutter charge mechanism, the shutter mechanism, and the film winding mechanism are composed of known sprockets, shutter drive levers, locking levers, shutter blades, springs, and the like, as described in the first embodiment.

  As shown in FIG. 7, the switching mechanism 50 includes a shutter cover 51, a fan-shaped lens holder 52, a toggle spring 53, a pressing spring 55, and a switching knob 46. The base member 30 is configured in the same manner as in the first embodiment, and a shutter blade 32 is disposed on the front surface of the opening 31a so as to be swingable around a shaft portion 30a implanted in the base member 30. Yes.

  The shutter cover 51 is attached to the front surface of the shutter blade 32, has an opening 56 on the photographing optical axis 43a, a shaft member 57 below the opening 56, a stopper pin 58 on the left side of the opening 56, and A stopper wall 59 is formed on the right side of the opening 56.

  The lens holder 52 disposed on the front surface of the shutter cover 51 is provided with a bearing portion 60 at a position corresponding to the main part of the fan shape. By inserting the bearing portion 60 into the shaft member 57, the lens holder 52 is arranged such that the fan portion rotates above the shaft member 57. In the lens holder 52, a small hole (pinhole) 61 for wide photographing that allows subject light to pass on the same radius with respect to the bearing portion 60 and a diaphragm opening 62 for telephoto photography are arranged side by side in the rotation direction. A transparent and flat protective plate 61 a is attached in front of the small hole 61, and a two-lens telephoto lens 54 is attached in front of the aperture opening 62. The telephoto lens 54 is composed of two lenses 54a and 54b and a spacing ring 54c sandwiched between them.

  The lens holder 52 is provided with an engaging protrusion 63 between the bearing portion 60 and a position through which the photographing optical axis 43a passes. The switching knob 46 is provided on the pedestal 46a. The pedestal 46 a slides on the back surface of the front cover 47 and closes the gap between the slot 44 and the switching knob 46. The pedestal 46a is provided with an engaged portion 64 that protrudes toward the back. The engaged portion 64 engages with the engaging protrusion 63.

  The lens holder 52 rotates to the “wide shooting position” when the switching knob 46 is slid to the right, and to the “tele shooting position” when the switching knob 46 is slid to the left. At the wide shooting position, the right end of the lens holder 52 abuts against the stopper wall 59 and the small hole 61 is positioned on the shooting optical axis 43a. At the telephoto position, the stopper pin 58 is engaged with a notch 65 formed at the left end of the lens holder 52 so that the telephoto lens 54 is positioned on the photographing optical axis 43a.

  The toggle spring 53 is disposed on the side opposite to the swing locus side of the shutter blade 32 with the photographing optical axis 43a interposed therebetween. The shutter cover 51 is formed with a recess 66 for securing a space for the coil portion 53a of the gull spring 53 to enter. The recess 66 is disposed in the rotation locus of the lens holder 52 when viewed from the front. One end of the toggle spring 53 is attached to the shutter cover 51 and the other end is attached to the lens holder 52, and the lens holder 52 is rotated beyond a dead center position that is approximately between the wide shooting position and the tele shooting position. The lens holder 52 is biased toward the wide shooting position or the tele shooting position. The coil portion 53a is located outside the rotation locus of the lens holder 52 at the wide photographing position, and the coil portion 53a enters the recess 66 at the tele photographing position.

  The holding spring 55 is a metal spring plate, one end of which is fixed to the back surface of the front cover 47, and the other end urges the lens holder 52 toward the shutter cover 51.

  The release lock mechanism includes a cam portion 67, a lock lever 68, and a torsion spring 69. The cam portion 67 is formed so as to protrude from the arc portion at the upper end of the lens holder 52. The lock lever 68 has a V-shape, and its closed side corner portion is rotatably provided on a shaft 51 a implanted in the shutter cover 51. One end 68 a on the V-shaped open side faces the pressing rod 15 a formed integrally with the lower part of the shutter button 15, and the other end 68 b faces the cam portion 58.

  The cam portion 67 is between the “lock position” where the one end 68a of the lock lever 68 is moved within the displacement locus of the pressing rod 15a and the “lock release position” where it is retracted outside the displacement locus of the pressing rod 15a. Rotate. The range of the cam portion 67 that rotates the lock lever 68 to the lock position is a range corresponding to the time during which the lens holder 52 rotates in a range other than the wide shooting position or the tele shooting position. The position of the cam portion 67 that rotates the lock lever 68 to the unlock position corresponds to the position where the lens holder 52 is rotated to the wide shooting position or the tele shooting position. When the lock lever 68 rotates to the lock position, one end 68a of the lock lever 68 prevents the pressing rod 15a from pressing the locking lever and locks the shutter release. The lock lever 68 is always urged by the torsion spring 69 in the rotational direction in which the other end 68 b of the lock lever 68 contacts the cam portion 67.

  8A to 8C, in accordance with the operation of the switching knob 46, the lens holder 52 moves from the wide shooting position to the tele shooting position, and the rotation position of the lens holder 52 is regulated by the switching mechanism 50. Show the state. At the time of wide shooting, the switching knob 46 is operated in the direction of the index W, and the right end of the lens holder 52 abuts against the stopper wall 59 and is set at the wide shooting position as shown in FIG. In this state, the lens holder 52 is urged by the toggle spring 53 in the direction in which the lens holder 52 abuts against the stopper wall 59, and the wide photographing small hole 61 is accurately positioned on the photographing optical axis 43a.

  Further, when the lens holder 52 is in the wide shooting position, the lock lever 68 is located in the unlock position. As a result, one end 68a of the lock lever 68 is retracted outside the movement locus of the pressing rod 15a, and shutter release is allowed. By depressing the shutter button 15 in this state, subject light is exposed to the photographic film 28 through the small hole 61 for a predetermined time.

  When performing tele photography, the switching knob 46 is operated in the direction of the index T, and the lens holder 52 rotates counterclockwise while resisting the urging force of the toggle spring 53 as shown in FIG. go. When the turning of the lens holder 53 is continued, the urging force of the toggle spring 53 acts in the direction of assisting the counterclockwise turning in the middle of the rotation range. Thereafter, as shown in FIG. 8C, the coil portion 53a of the toggle spring 53 moves in the rotation locus of the lens holder 52, and the counterclockwise turning is stopped with the stopper pin 58 engaged with the notch portion 65. Is done. At this time, the coil portion 53a enters the recess 66, and the telephoto photographing lens 54 is accurately positioned on the photographing optical axis 43a.

  Further, during the counterclockwise rotation of the lens holder 52, the cam portion 67 rotates the lock lever 68 to the lock position. As a result, the one end 68a of the lock lever 68 enters the displacement locus of the pressing rod 15a to prevent the pressing rod 15a from being displaced. Therefore, no exposure is performed even if the shutter button 15 is accidentally pressed while the switch knob 46 is being slid.

  When the lens holder 53 is set at the telephoto position, the cam portion 67 rotates the lock lever 68 to the unlock position. As a result, the one end 68a of the lock lever 68 is located outside the movement locus of the pressing rod 15a, so that the exposure operation is allowed.

  9 and 10 are schematic cross-sectional views along the photographing optical axis 43a during wide photographing and tele photographing. As an example, it is assumed that the diameter of the small hole 61 is about 0.5 mm, and the shutter mechanism is configured so that the exposure time of one photographing is about 1/80 seconds. The photographic film 28 requires a highly sensitive ISO 1600 film or a film with higher sensitivity. FIG. 9 shows the case of wide photographing, where the small hole 61 is positioned on the photographing optical axis 43a, and the distance from the small hole 61 to the photographic film 28 is about 32 mm. FIG. 10 shows the case of telephotographing, where the telephoto photographic lens 54 is positioned on the photographic optical axis 43a, and the focal length of the telephoto photographic lens 54 is 50 mm.

  The photographer can switch between wide shooting with a pinhole and tele shooting with a tele shooting lens at any time by operating the switching knob 46. As described above, since the film-integrated camera 40 does not use a lens at the time of wide shooting, a lens holding member or the like is not required, and the optical configuration of the exposure unit 49 is simplified, which is used for simplification and cost reduction. It becomes.

  Note that the size of the small holes, the distance from the small holes to the photographic film, and the exposure time in the first embodiment are not limited to the above numerical values. Further, the size of the small hole, the distance from the small hole to the photographic film, the focal length of the telephoto photographing lens, and the exposure time in the second embodiment are not limited to the above numerical values.

It is a perspective view which shows the external appearance of the film integrated camera of 1st Embodiment. It is a disassembled perspective view of a main body. It is a disassembled perspective view of an exposure unit. It is the cross-sectional schematic along an imaging | photography optical axis. It is a perspective view which shows the external appearance of the film integrated camera of 2nd Embodiment. It is a disassembled perspective view of a main body. It is a disassembled perspective view of an exposure unit. (A) is a wide shooting position, (B) is an intermediate position, and (C) is a diagram showing a tele shooting position. It is the cross-sectional schematic diagram along the imaging | photography optical axis at the time of wide imaging | photography. It is the cross-sectional schematic diagram along the imaging | photography optical axis at the time of tele imaging | photography.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Film integrated camera 12 Main body 13a Image-taking optical axis 21 Exposure unit 23 Main body base 28 Photo film 30 Base member 31 Dark box 32 Shutter blade 33 Shutter cover 34 Small hole (pinhole)
40 Film Integrated Camera 43a Shooting Optical Axis 46 Switching Knob 49 Exposure Unit 50 Switching Mechanism 51 Shutter Cover 52 Lens Holder 54 Telephoto Lens 61 Small Hole (Pinhole)
62 Aperture aperture

Claims (4)

In a film-integrated camera in which an exposure apparatus is attached to a base that holds a roll-shaped photographic film so that it can be rolled up.
The exposure apparatus includes a pinhole formed on a photographic optical axis and a shutter mechanism that controls an exposure time of the photographic film to subject light incident along the photographic optical axis. Film integrated camera. In a film-integrated camera in which an exposure apparatus is attached to a base that holds a roll-shaped photographic film so that it can be rolled up.
The exposure apparatus is rotatable in a plane perpendicular to the photographing optical axis, and a lens holder in which a pinhole and an aperture opening are formed, and a lens mounted on the front surface of the aperture opening of the lens holder, A switching mechanism that regulates the rotation position of the lens holder to position either the pinhole or the lens on the photographic optical axis, and an exposure time of the photographic film on the subject light incident along the photographic optical axis. And a shutter mechanism for controlling the camera.   3. A film-integrated camera according to claim 1, wherein the pinhole has a diameter of approximately 0.5 mm.   4. The film-integrated camera according to claim 1, wherein the photographic film has a sensitivity of ISO 1600 or more.

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