JP2005202428A - Lens-fitted film unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens-fitted film unit having improved suitability to recycling by making it possible to eject a built-in date imprinting mechanism without causing break or damage. <P>SOLUTION: A data module 27 for imprinting a calendar date onto a photo film 31 from the emulsion surface side is built in between a front cover 22 and an exposure unit 25. The data module 27 consists of a base plate provided with a transmission type liquid crystal display 45 behind a lighting window 6 formed in the front cover 22, and a power supply battery 47 attached to the back of the base plate within an extent of the external contours as viewed from the side of a taking lens 39. The front cover 22 is formed with a swollen part 15 which spatially encircle a taking window 5, the lighting window 6 and the data module 27, and the data module 27 is housed within the swollen part 15. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lens-fitted photo film unit incorporating a data copying mechanism, and more particularly to a lens-fitted photo film unit that is collected after use and recycles the data copying mechanism.

  The present applicant provides a lens-fitted photo film unit with a built-in photographic film so that the user can easily take a photo at any time. The lens-equipped film unit has a main body base loaded with a photographic film cartridge, a front cover attached in front of the main body base, and a rear cover attached on the back of the main body base. An exposure imparting mechanism such as a shutter mechanism, a photographing lens, and a strobe unit is incorporated in the main body base. When you have finished shooting all of the photo frames in your photo film, you can submit them to the laboratory. At the development station, the cartridge containing the exposed photographic film is removed by opening the bottom cover of the rear cover, and processing such as development and printing is performed using the current development processing system. The user is returned with a printed photo and a developed photo film.

By the way, what built the date imprinting mechanism in the film unit with a lens is known (patent document 1). The date imprinting mechanism described in this gazette has a date imprinting shutter in conjunction with a photographing shutter blade when photographing is performed after setting a desired date with a dial-type manual date operating unit provided on the back of the body. When the member is activated, the natural light incident from the window on the front of the body is guided to the back side of the back cover through the light guide, and exposed from the back side of the photographic film through the date imprinting plate on which the white date (transparent) is displayed. The date is closely displayed on the screen. In this mechanism, natural light is used as a light source for generating a data image during copying. This light is taken in from the photographic lens side, and is guided to a data copying plate arranged on the back side of the film by a light guide arranged through the lower outside of the dark box between the photographic lens and the exposure opening.
Japanese Patent Laid-Open No. 5-289164

  However, the lens-equipped film unit incorporating the date imprinting mechanism has poor recyclability. This is because the data imprinting mechanism described above is covered with the front cover and the rear cover and is not easily damaged or damaged, and can be used as it is for a new product as it is. Therefore, in order to reuse, the date imprinting plate, the manual date operation unit and the like are removed from the rear cover. Moreover, there is a possibility that the reused parts are broken or damaged during the disassembling work.

  The present invention has been made in consideration of the above-mentioned problems of the prior art, and provides a film unit with a lens that improves the recyclability by devising the built-in date imprinting mechanism so that it can be taken out without being damaged or damaged. The purpose is to do.

  In order to achieve the above object, in the lens-fitted photo film unit according to the present invention, an exposure unit is provided with a data module provided with a transmissive liquid crystal display that displays a date automatically updated by a clock circuit that stores a calendar in advance. In a state of being positioned by the positioning means provided on the front cover, it is detachably assembled between the front cover, and the data light created by transmitting external light through the liquid crystal display section is applied to the photographic film set in the exposure opening. An imaging optical system that forms an image from the front surface is detachably mounted inside a dark box provided in the exposure unit.

  As described above, in the film unit with a lens according to the present invention, since the date module is incorporated between the exposure unit and the front cover, it can be removed safely and easily just by removing the front cover, and the recyclability is improved. To do. In addition, since the imaging optical system is also detachably attached in the dark box of the exposure unit, it is easy to remove and the recyclability is improved.

  Hereinafter, a lens-fitted photo film unit incorporating a data copying mechanism will be described. As shown in FIG. 1, a film unit with a lens (hereinafter referred to as “film unit”) 1 is composed of a unit main body 2 and an exterior body 3 that covers the outer periphery thereof. The unit body 2 has a grip part 4, a photographing window 5, a daylighting window 6, a viewfinder objective window 7, a strobe light emission window 8, a strobe charging start button 9 on the front surface, and a shutter button 10 and a remaining film number display window on the upper surface. 11, a charging completion lamp display window 12, and a winding knob 13 and a viewfinder eyepiece window 14 are arranged on the back surface.

  The front surface of the unit main body 2 has a shape that is recessed by one step leaving the grip portion 4 and the bulging portion 15, and is made thinner as before. The bulging portion 15 is a portion that bulges in a range including a part of the photographing window 5, the daylighting window 6, and the strobe charging start button 9 when viewed from the photographing lens side, and the upper end in the height direction is the finder objective window 7. The photographing window 5 and the daylighting window 6 are included in a distance from the predetermined distance to the lower end. Further, in the horizontal direction, the left end is a predetermined distance away from the grip portion 4 and the right end is a length applied to a part of the strobe charging start button 9, and the photographing window 5 and the lighting window 6 are included therebetween. A lens barrel covering the photographing lens is formed on the front surface of the bulging portion 15 so as to protrude.

  The exterior body 3 has an unfolded shape as shown in FIG. 2, and becomes a rectangular parallelepiped small box when assembled after the unit body 2 is placed. Assembling can be performed by gluing the glue margin portions. In order to expose the bulging portion 15, the finder objective window 7, the strobe light emission window 8, the remaining film number display window 11, the charge completion lamp display window 12, and the finder eyepiece window 14 to the outside shape of the exterior body 3. 3a to 3f, and a notch 3g for exposing to the outside through the shutter button 10 and the winding knob 13 are formed. The opening 3a that exposes the bulging portion 15 is formed with a minimum gap between which an opening 3b that exposes the finder objective window 7 and an opening 3c that exposes the strobe light emission window 8 can be formed adjacent to each other. Yes. As a result, the small box shape of the exterior body 3 can be tightly covered with the unit main body 2, and inconveniences such as dust entering from the gap between the unit main body 2 and the exterior body 3 and failure of the internal mechanism can occur. Can be prevented.

  As shown in FIG. 3, the unit main body 2 includes a front cover 22, a rear cover 23, a main body base 24, an exposure unit 25, a strobe unit 26, a data module 27, and a photographic film cartridge 28.

  A cartridge storage chamber 30 for storing the cartridge 29 and a film storage chamber 32 for storing the unexposed photographic film 31 pulled out from the cartridge 29 in the form of a film roll 31a are integrally formed in the main body base 24. ing. In the present embodiment, only the film roll 31a is accommodated, but for example, a film roll wound around a core may be accommodated. The photographic film 31 is engaged with a spool 33 provided at the cartridge 29 at the rear end of the film. The photographic film 31 has a predetermined film sensitivity. In addition to the 135 type, the photographic film cartridge 28 uses a type in which the leading end of the film is stored inside the cartridge when not in use, and the photographic film can be sent out of the cartridge by rotating the spool. Also good.

  The front cover 22 is integrally formed with a shutter button 10 and a charging completion lamp display window 12 on the top surface, and a bulging portion 15, a strobe charging start button 9 and a strobe light emission window 8 on the front surface. The rear cover 23 is formed with a viewfinder eyepiece window 14 and an opening 23 a for exposing the winding knob 13 to the outside. The rear cover 23 is detachably attached to the back of the main body base 24, and is a photographic film cartridge between the main body base 24 and the rear cover 23. 28 is stored in a light-tight manner. The bottoms of the cartridge storage chamber 30 and the film storage chamber 32 are open, and after the photographic film cartridge 28 is loaded, the cartridge storage chamber 30 and the film storage chamber 32 are respectively closed by pull-top type bottom covers 34 and 35 provided on the rear cover 23. Of these, the bottom cover 34 serves as a cover for taking out the cartridge 29 containing the photographed photographic film.

  On the upper surface of the cartridge storage chamber 30, a winding knob 13 is rotatably arranged. A fork is formed integrally with the lower part of the winding knob 13, and the fork is inserted through the opening on the upper surface of the cartridge storage chamber 30 and engaged with the spool 33. The winding knob 13 is exposed from the opening 23a of the rear cover 23, and the spool 33 is rotated in the film winding direction by a rotation operation in the film winding direction (counterclockwise direction shown in the figure). Constitutes a winding mechanism for storing the cartridge in the cartridge 29.

  A divided dark box 37 that is a part of the dark box is integrally provided between the cartridge storage chamber 30 and the film storage chamber 32. An exposure opening 38 is formed on the back side of the divided dark box 37. The exposure unit 25 is detachably attached to the front surface of the divided dark box 37.

  In the exposure unit 25, a photographing lens 39, a shutter mechanism, a film winding mechanism, a shutter charge mechanism, a finder optical component, and the like are incorporated in a divided dark box 53 serving as a base, and these are unitized. A data module 27 is detachably attached to the right front side of the exposure unit 25.

  The photographing lens 39 is disposed at a position corresponding to the photographing window 5. The divided dark box 53 of the exposure unit 25 forms a dark box in combination with the divided dark box 37 of the main body base 24. When the dark box is formed, the photographing optical path between the photographing lens 39 and the exposure opening 38 is in a dark room state. Although the dark box is divided, the dark box may be integrally provided on either the main body base 24 or the exposure unit 25 side without being divided.

  The strobe unit 26 is detachably attached by being sandwiched in a space between the front cover 22 and the film storage chamber 32, and includes a sync switch 40, a main capacitor 41, a power supply battery 42, a strobe light emitting unit 43, and a strobe unit. It consists of a substrate 44 and the like. When the operation for pressing the strobe charging start button 9 is performed, the voltage from the power supply battery 42 is boosted and the main capacitor 41 is charged. The synchro switch 40 is turned on by operating the shutter mechanism in conjunction with the shutter release. When the synchro switch 40 is turned on, a trigger signal is given to the discharge tube inside the strobe light emitting unit 43, the discharge tube is discharged by the charging voltage stored in the main capacitor 41, and strobe light is emitted from the strobe light emitting unit 43. . This strobe light is emitted toward the subject through the strobe light emission window 8.

  The data module 27 includes a module substrate in which a crystal oscillator, a clock circuit, an LCD driver, a liquid crystal display unit 45 for transmission type character generation, a date initial setting switch, and the like are integrated, and a power supply battery 47 for the module. The power supply battery 47 is housed in the form of a unitized part in the form of the contour shape as viewed from the back surface of the module substrate and from the photographing window 5 side. Thus, since the power supply battery 47 is attached to the back surface of the module substrate, the bulging portion 15 of the front cover 22 into which the data module 27 enters can be made flat. Further, since the power supply battery 47 is attached to the back side, a storage space for the power supply battery 47 is not required between the power supply battery 47 and the strobe board 44 arranged on the right side thereof. Further, since the power battery 47 is attached so as to be within the range of the contour shape seen from the photographing window 5 side, the projection area of the data module 27 seen from the photographing window 5 side can be reduced, and the contour shape of the bulging portion 15 Can be reduced.

  The clock circuit stores a calendar for the next several years. The built-in reference pulse generator is corrected by a crystal oscillator to obtain an accurate time pulse, and the relationship between the year, month, and day is liquid crystal. Display accurately on the display unit 45. The date initial setting switch is used for initial setting of the date. The display of the data module 27 is set in advance based on the date of production at the factory, and cannot be changed from the outside of the film unit 1. The power battery 47 is of a button type and is attached so that it can be easily replaced when the data module 27 is removed.

  The liquid crystal display unit 45 is arranged behind the condenser lens 46 at a position corresponding to the daylighting window 6 of the front cover 22 and generates, for example, characters “96 5 10” in white. The year, month, and day are composed of two characters each, and one character is displayed in 7 segments. Note that since only the second digit of the character representing the month needs to be displayed as “1”, it is a two-segment display in which straight segments are arranged vertically. Further, a condensing lens 46 sandwiched between the inner wall of the front cover 22 is provided on the front surface of the liquid crystal display unit 45. The condenser lens 46 is disposed behind the daylighting window 6 and condenses the natural light incident from the daylighting window 6 on the liquid crystal display unit 45.

  As shown in FIG. 4, a lens holder 48 that also serves as a shutter cover that covers a front surface of a shutter blade, which will be described in detail later, is detachably attached to the front surface of the exposure unit 25. The lens holder 48 is integrally formed with a mounting portion 49 for mounting the data module 27 on the right side of the portion that holds the photographing lens 39. The mounting portion 49 receives positioning pins 49 a and 49 b for positioning the data module 27, elastic locking claws 49 c and 49 d for holding the data module 27, and date light transmitted through the liquid crystal display portion 45. Openings 49e for allowing them to pass toward the back are integrally formed. In the data module 27, positioning holes 27a and 27b are formed. When these positioning holes 27a and 27b are inserted into the positioning pins 49a and 49b from the front side along the photographing optical axis 54, the liquid crystal display unit 45 is positioned at a predetermined position, and the upper and lower contours of the data module 27 are engaged with the locking claws. The liquid crystal display unit 45 is held by being locked to 49c and 49d, respectively.

  As shown in FIG. 5, a fixed aperture 39a is supported behind the photographing lens 39 provided in the exposure unit 25, and a shutter blade 50 is supported behind the fixed aperture 39a. The shutter blade 50 is urged by a pull-back spring 51 toward a closed position where the shutter opening 52 is closed. The shutter opening 52 is provided on the photographing optical axis 54 that passes through the center of the front surface of the divided dark box 53, that is, the center of the photographing lens 39. The shutter blade 50 is kicked at its upper end by a kicking lever constituting the shutter mechanism in conjunction with the shutter release, and swings one reciprocating motion about the shaft 55 to open and close the shutter opening 52. During this time, the subject light incident on the shutter opening 52 enters the dark box 56 constituted by the two divided dark boxes 37 and 53, passes through the harmful light shielding frame 57, and is exposed to the photographic film 31 set in the exposure opening 38. Is done. When the shutter blade 50 fully opens the shutter opening 52, the sync switch 40 of the strobe unit 26 is turned on by the protrusion 58 provided at the upper end of the shutter blade 50.

  On the other hand, the date light transmitted through the liquid crystal display unit 45 during one reciprocal swing of the shutter blade 50 does not pass through the photographing lens 39, passes through the date light shutter opening 59 formed on the front surface of the dark box 56 and passes through the dark box 56. Led inside. The date light shutter opening 59 is provided separately from the shutter opening 52 at a position to the lower right of the shutter opening 52 when viewed from the front, and the date light shutter integrally provided at the tip of the shutter blade 50. The member 60 is opened and closed in conjunction with the opening and closing operation of the shutter blade 50. The shutter member 60 is provided on the side opposite to the rotary shaft 55 with an opening / closing part 50 a closing the shutter opening 52 interposed therebetween.

  The date light guided into the dark box 56 is guided to the exposure aperture 38 along the optical axis 61 of the imaging optical system, and forms an image on the photographic film 31 set here from the emulsion surface side. The imaging optical system is composed of two mirror plates 62 and 63 and an imaging lens 64, and these are positioned in front of the harmful light shielding frame 57 so as to be located outside the photographing light flux passing through the dark box 56. It is sandwiched between the side and the front inner wall of the divided dark box 53.

  The harmful light shielding frame 57 includes holes 57b and 57c provided on the left and right sides of the opening edge 57a that shields harmful light for photographing along the photographing optical axis 54 from the exposure opening 38 side, and the inner left and right sides of the divided dark box 53. Are inserted into a pair of pins 53a and 53b, and then the heads of the pair of pins 53a and 53b protruding from the holes 57b and 57c are fixed by caulking.

  As shown in FIGS. 6 and 7, the mirror plates 62 and 63 are inserted from the exposure opening 38 side toward the inner wall of the inner front surface of the divided dark box 53 along the optical axis 54. Two concave portions 57 i and 57 h for positioning the mirror plates 62 and 63 are formed on the inner wall of the inner front surface of the divided dark box 53. The mirror plates 62 and 63 are inserted into the recesses 57i and 57h. Among these, the mirror plate 63 is pressed from the exposure opening 38 side by a pressing portion 65b provided on a positioning member 65, which will be described in detail later. The positioning member 65 is positioned and held at a predetermined position by a pin 57 e provided on the harmful light shielding frame 57 and a pin 53 c provided on the inner wall of the inner front surface of the divided dark box 53.

  The imaging lens 64 is inserted into a lens holding opening 65 a provided in the positioning member 65, and is positioned along the direction orthogonal to the optical axis 54 by a lens pressing portion 57 d provided at the upper right of the harmful light shielding frame 57. It is decided and held. The lens pressing portion 57d has a protruding shape that holds only the collar portion of the imaging lens 64. The lens pressing portion 57 d determines the position of the imaging lens 64 along the optical axis 54 with the front inner wall of the divided dark box 53. The mirror plate 62 protrudes forward and is pressed from the exposure opening 38 side by a mirror pressing portion 57 f provided on the harmful light shielding frame 57. The pressing portion 65b and the concave portion 57i are shaped to hold the outside of the effective reflecting surface so as not to block the date light in order to press the reflecting surfaces of the mirror plates 62 and 63.

  As shown in FIG. 7, the date light transmitted through the liquid crystal display unit 45 is reflected by the mirror plate 62 toward the upper side of the photographing optical axis 54 and is reflected by the other mirror plate 63 toward the exposure opening 38. The light enters the imaging lens 64. The imaging lens 64 images the date light on the upper right portion of the exposure opening 38 when viewed from the photographing lens 39 side. In this way, since the date light is imprinted on the upper right of the exposure opening 38, the date image is surely imprinted on the lower side with respect to the subject image not only in the horizontal position shooting but also in the vertical position shooting. For example, date images are not duplicated on the face of the subject.

  Note that the vertical position shooting here refers to a posture in which the film unit 1 is vertically held so that the shutter button 10 is located at the lower right. Further, as the imaging optical system, a Z-shaped light guide or prism may be used instead of the two mirror plates 62 and 63. In this case, the positioning member 65 is omitted, and the light guide or the prism is configured to be sandwiched between the harmful light shielding frame 57 and the dark box 56. According to this, since the date light incident on the light guide or the prism is totally reflected inside, it does not leak to the outside, and no harmful light is mixed into the photographing light flux.

  The operation of the lens-equipped film unit configured as described above will be described. In the factory, first, the exposure unit 25 is assembled. This assembly incorporates a shutter mechanism, a film winding mechanism, a film counter mechanism, a finder optical system, and the like. These incorporations are performed by insertion from above into the upper surface side of the divided dark box 53. The partially assembled exposure unit 25 is attached to the main body base 24 from the front side by claw coupling.

  The exposure unit 25 is attached by inserting the shutter blade 50 and the pull-back spring 51 in this order from the top after the photographic lens 39 side is oriented upward. Thereafter, the strobe unit 26 is inserted from above and attached to the main body base 24. As a result, the sync switch 40 enters the swing locus of the shutter blade 50. Then, the lens holder 48 to which the photographing lens 39 is previously attached is inserted from above and attached to the exposure unit 25.

  Thereafter, the data module 27 is inserted from above and attached to the lens holder 48. At this time, the positioning holes 27a and 27b are fitted to the positioning pins 49a and 49b provided in the lens holder 48. Then, by pushing the data module 27 to the end, the locking claws 49 c and 49 d are engaged with the upper and lower contour portions of the data module 27, and the data module 27 is held at a predetermined position of the exposure unit 25.

  After the data module 27 is attached, the condenser lens 46 is placed on the liquid crystal display unit 45 from above, and then the front cover 22 is inserted from above and attached to the main body base 24. Thereby, the condensing lens 46 is clamped between the inner wall of the front cover 22. In this way, all the parts such as the exposure unit 25, the strobe unit 26, the lens holder 48, the data module 27, the condenser lens 46, and the front cover 22 are unified with respect to the main body base 24 in one direction. Therefore, for example, if it is assembled to the main body base 24 placed with the front side facing upward, all parts are inserted from above, and automated assembly can be performed easily.

  Next, an imaging optical system is attached. Since this attachment is an insertion from the back side of the main body base 24, for example, the main body base 24 is inverted so that the back side faces up. Then, the mirror plates 62 and 63, the positioning member 65, the imaging lens 64, and the harmful light shielding frame 57 are assembled in the dark box 56 in order from one direction.

  The main body base 24 to which the imaging optical system is attached is transported to a dark room where a photographic film cartridge 28 is loaded. This loading is performed by loading the cartridge 29 into the cartridge storage chamber 30 of the main body base 24 and the unrolled photographic film 31 from the cartridge 29 into a roll form and then loading the film roll 31a into the film storage chamber 32 and then the rear cover. 23 is attached to the main body base 24 from behind, and finally the bottom lids 34 and 35 are closed. Then, the finished unit main body 2 is shipped after the exterior body 3 is covered.

  For shooting, first, the winding film 13 is operated to wind up the photographic film 31. When the photographic film 31 is wound up, the sprocket constituting the film winding mechanism is rotated in accordance with this, and the sprocket is rotated by a predetermined amount by winding up one frame of film, and the film winding mechanism is operated in conjunction with this. The rotation of the sprocket and the rotation of the winding knob 13 are locked. As a result, the first shooting frame is set in the exposure opening 38.

  When the pressing operation of the shutter button 10 is performed, the shutter blade 50 is kicked by the kick lever in response to this. The kicked shutter blade 50 moves back and forth around the shaft 55 once. Since the shutter blade 60 for date light is integrally formed on the shutter blade 50, the two shutter openings 52 and 59 are opened and closed by swinging, and the photographing window 5 is opened in one shutter opening 52 during the opening and closing. The subject light passing through the photographing lens 39 and the date light created through the daylighting window 6, the condenser lens 46, and the liquid crystal display unit 45 enter the inside of the dark box 56 from the other shutter opening 59. .

  The subject light passes through the harmful light shielding frame 57 in the dark box 56 and enters the photographic film 31 set in the exposure opening 38. The date light is incident on the imaging lens 64 through the mirror plates 62 and 63, and is imaged on the upper right of the photographic film 31 set in the exposure opening 38 by the imaging lens 64, and is exposed overlapping with the subject light. Is done. The amount of subject light reaching the film surface is determined by the time during which the shutter blades 50 open the fixed aperture 39a. It is decided in advance. Since the shutter member 60 opens and closes together with the shutter blade 50, the date light amount reaching the film surface is uniquely determined. Therefore, a condensing lens 46 is arranged in front of the liquid crystal display unit 45 to increase the date light amount reaching the film surface so that the image can be seen more clearly. In addition, since the imaging lens 64 is employed, the contour of the date image can be clearly captured.

  In the case of flash photography, the flash charging start button 9 is pressed before the shutter button 10 is pressed. As a result, the voltage from the power supply battery 42 is boosted and charging of the main capacitor 41 is started. When the charging of the main capacitor 41 is completed, a lamp indicating the completion of charging is displayed on the outside in the charging completion lamp display window 12. If the shutter button 10 is pressed after confirming this display, the sync switch 40 is turned on while the shutter blades 50 are swinging, and the strobe light emitting unit 43 emits strobe light toward the subject. The strobe light is reflected by the subject, then is guided through the photographing lens 39 into the dark box 56 from the shutter opening 52 and enters the photographic film 31 set in the exposure opening 38. On the other hand, the strobe light reflected by the subject also enters the daylighting window 6. The incident light passes through the liquid crystal display unit 45 and becomes date light. This date light is exposed to the photographic film 31 as described above. According to this, even in the case of flash photography in the dark, the date image can be reliably transferred.

  Hereinafter, by repeating the above-described shooting, a date image is imprinted on each shooting frame of the photographic film 31 together with the subject image. After the last shooting frame has been shot, the film counter mechanism prohibits the operation of the film winding stop mechanism. As a result, the film winding stop does not operate, so that all the photographed photographic films 31 are wound inside the cartridge 29 by the film winding operation.

  The film unit that has been photographed is submitted to the developing station, where the bottom cover 34 is opened and the cartridge 29 containing the exposed photographic film 31 is taken out. The taken out cartridge 29 is set in a film processor, and the exposed photographic film 31 is developed. A printed photograph is created from the developed photograph film 31 by a printer processor. The created printed photograph and the developed photograph film are returned to the user. In the finished print photo, the date is recorded in the lower right in the case of an image taken in the horizontal position, and in the lower left in the case of the image taken in the vertical position. Note that the date is taken in the same direction as the image taken in the horizontal position.

  Empty film units with lenses are collected at the factory and recycled. In recycling, since the data module 27 and the exposure unit 25 are protected by the front cover 22 and the rear cover 23, respectively, they can be recovered without breakage or damage. Therefore, after the front cover 22 and the rear cover 23 are removed, If the strobe unit 26, the data module 27, and the exposure unit 25 are taken out, they can be reused as they are. The power battery 47 of the data module 27 is replaced after being taken out.

  Some types of film unit with a lens do not have a built-in data copying mechanism. In the case of this type, if the data module 27 and the imaging optical system are omitted, and the daylighting window 6 of the front cover 22 is closed with, for example, an exterior body, the rest can be used as common parts. .

  There is also a type in which the strobe unit 26 is not incorporated. In this case, since the strobe charge start button 9, the strobe light emission window 8, and the charge completion lamp display window 12 are omitted, the bulging portion 15 has a substantially rectangular shape without the strobe charge start button 9. What is necessary is just to form the opening 3a of the exterior body 3 according to this shape. In addition to the box-shaped type, the exterior body 3 may be an exterior body 70 that covers the front surface, top surface, back surface, and bottom surface of the unit main body 2 in a laver shape, for example, as shown in FIG. In this case, it may be a box type that is simply assembled by adhering glue margins, or the entire back surface of the exterior body 70 may be attached using label paper. Further, the opening for exposing the bulging portion 15 to the outside may be a part of which is cut out.

  As a method for reducing the projected area as viewed from the front of the data module 27, for example, as shown in FIG. 9, the module substrate is formed in a cross-sectional crank shape so as to be recessed one step toward the strobe substrate 44, and is recessed one step. The data module 71 may have a configuration in which the power battery 47 is attached to the back of the surface. Further, as shown in FIG. 10, the data module 71 may be configured such that the circular surface of the power battery 47 is mounted horizontally. In this case, it is possible to fit in the space between the strobe board 44 by attaching it to the upper side of the back side of the board.

  In the above-described embodiment, the imaging optical system is constituted by the two mirror plates 62 and 63 and the imaging lens 64. However, the present invention is not limited to this, and a Z-shaped light guide is used instead. A prism or the like may be used. In this case, the positioning member 65 is omitted, and the light guide or the prism is configured to be sandwiched between the harmful light shielding frame 57 and the dark box 56. According to this, since the date light incident on the light guide or the prism is totally reflected inside, it does not leak to the outside, and extra light is not mixed in the photographing light flux.

  Further, a part or all of the imaging optical system may be attached to the harmful light shielding frame 57. FIG. 11 shows another embodiment in which a part of the imaging optical system is held by the harmful light shielding frame 57 and the rest is sandwiched between the inner wall of the dark box 56 and the harmful light shielding frame 57. The harmful light shielding frame 57 is integrally formed with a locking portion 74 that is detachably attached by inserting the holding portion 73 in parallel with the photographing optical axis by claw coupling. The holding portion 73 is U-shaped in cross section with the open side facing the upper surface, and a groove 73a into which the mirror plate 63 is inserted is formed on the tip side thereof. On the rear end side of the holding portion 73, an opening 73b into which the outer periphery of the imaging lens 64 is fitted is formed. The imaging lens 64 is sandwiched between the edge of the opening 73 b of the holding unit 73 and the harmful light shielding frame 57. The mirror plate 62 is sandwiched between the harmful light shielding frame 57 and the dark box 56 in the same manner as described with reference to FIG.

  FIG. 12 shows another embodiment in which the entire imaging optical system is held by the harmful light shielding frame 57. The harmful light shielding frame 57 is integrally formed with a holder portion 75 that protrudes from the opening edge 57a and holds the mirror plates 62 and 63 and the imaging lens 64 at predetermined positions. An imaging optical system is inserted into the holder 75 from a direction orthogonal to the photographing optical axis 54 and then attached to the inside of the dark box 56, so that the insertion side is blocked by the inner wall of the dark box 56 and is prevented from coming off.

  As described above, since the imaging optical system is sandwiched between the inner wall of the dark box 56 and the harmful light shielding frame 57, it is not necessary to separately provide a fixing member, and the cost can be reduced. Further, the imaging optical system and the harmful light blocking member or the harmful light shielding frame 57 holding them may be inserted into the dark box 56 from one direction parallel to the photographing optical axis 54. It becomes easy, and can also be made compatible with automated assembly.

  In the embodiment described with reference to FIGS. 11 and 12, a part or all of the imaging optical system is assembled in advance to the harmful light shielding frame 57, and in the embodiment described in FIG. Since the imaging optical system can be handled in the dark box, the suitability for assembly can be improved, and the labor of component management can be saved.

  In the embodiment described in FIG. 5, the imaging lens 64 and the two mirror plates 62 and 63 constitute the imaging optical system. However, the present invention is not limited to this, as shown in FIG. The two mirror plates 62 and 63 may be omitted and only the imaging lens 64 may be used. According to this, since the imaging optical system is composed of only the imaging lens 64, the number of parts can be reduced. In this case, the date light is incident on the lower right in the exposure screen of the photographic film 31 when viewed from the photographing lens 39 side.

  In the embodiment described with reference to FIG. 5, the date light shutter opening 59 is disposed at the lower right of the subject light shutter opening 52. As another embodiment, as shown in FIG. The light shutter opening 77 may be disposed at the upper right of the shutter opening 52.

  The shutter blade 76 shown in FIG. 14 includes an opening / closing portion 76a that covers the shutter opening 52 that serves as a subject light incident opening, and a shutter member 76b that is integrally provided outside the swinging locus of the opening / closing portion 76a. . The shutter member 76b opens and closes a shutter opening 77 which is a data copying light incident opening. According to this, as shown in FIG. 15, the date light is incident on the upper right position in the dark box as viewed from the photographing lens side, and is connected to the upper right of the photographic film set on the exposure screen by the imaging lens. If the image is taken, the date position on the print will be at the bottom of the screen in normal position shooting, and the image will be printed at a more natural position. Note that the position of the daylighting window 6 of the front cover 22 is, of course, the upper right as viewed from the photographing lens 39 side, but is omitted in the drawing.

  FIG. 16 shows the positional relationship between the date light shutter openings 59 and 77 in the embodiment described in FIG. 5 and the embodiment described in FIG. In the figure, reference numeral 78 denotes a swing locus of a portion where the opening / closing portion 50a covers the subject light shutter opening 52. The date light shutter opening 59 in the embodiment described in FIG. 5 and the embodiment described in FIG. It is shown that the date light shutter opening 77 in FIG.

  The subject light shutter opening 52 provided on the front surface of the dark box is formed in a stepped surface, and as shown in the drawing, when the shutter blade 50 is closed, the light shielding rib provided on the back surface side of the shutter blade 50. 79 surrounds the step and cooperates with the dark box side light shielding rib 80 provided so as to protrude from the front surface of the opposite dark box 53 to prevent light leakage from the surroundings.

  FIG. 17 is a diagram illustrating a detailed shape around the shutter blade 50 and the shutter opening 52 in the embodiment described with reference to FIG. 5. The light shielding rib 81 provided on the back side of the shutter blade 50 and the light shielding rib 82 on the dark box side are on the opening direction side of the shutter blade 50 and provide a gap between the subject light shutter opening 52 and the date light shutter opening 59. It is formed so as to be shielded from light.

  In addition, in the example described with reference to FIG. 17, the strobe substrate 44 disposed adjacent to the strobe substrate 44 is illustrated. However, as can be seen from FIG. 17, the portion surrounded by the swing locus 78 of the shutter blade 50 and the outer shape of the strobe substrate 44 is , It becomes narrower as it goes to the upper right of the shutter opening 52. Accordingly, when the date light shutter opening 77 is arranged on the upper right side of the shutter opening 52 as in the example described with reference to FIG. 14, the strobe substrate 44 is driven to the outside, resulting in an increase in the size of the lens-fitted photo film unit main body. become. That is, it can be seen that the position of the date light shutter opening 59 in the example described in FIG. 5 is an effective arrangement for downsizing the lens-fitted photo film unit body.

  FIG. 18 is a diagram illustrating a detailed shape around the shutter blade 50 and the shutter opening 52 in the embodiment described with reference to FIG. The shape of the light shielding rib 83 and the dark box side light shielding rib 84 provided on the back side of the shutter blade 50 is outside the swinging locus of the shutter blade 50 and between the subject light shutter opening 52 and the date light shutter opening 77. It is formed so as to shield the gap generated around.

  As described with reference to FIG. 17, the arrangement of the date light shutter opening 77 in this embodiment causes an increase in the size of the lens-fitted photo film unit, but the date imprinting position is set on the exposure screen. Since it is on the upper right side of the photo film 31, there is an advantage that the date position on the print is at the bottom of the screen in normal position shooting and the image is printed at a more natural position.

  In the embodiment described with reference to FIG. 5, the rotating shaft 55 of the shutter blade 50 and the shutter member 60 for date light are provided on both sides of the subject light incident shutter opening 52, respectively. As shown in FIG. 19, the rotating shaft 87 of the shutter blade 86 and the shutter member 88 for date light may be provided on one side of the subject light incident shutter opening 85, respectively. In this case, since the shutter opening 89 for data light is formed in the upper right of the shutter opening 85 for subject light when viewed from the photographing lens side in the front surface of the dark box, it is different from the shutter blade 86 described in FIG. The shutter opening 89 for date light is positioned within the range of the opening / closing locus of the shutter blade 86 in the swing direction. For this reason, the shutter blade 86 has a slit-like opening 90 that is wide in the swinging direction and has a width matching the size of the shutter opening 89 for opening the shutter opening 89 for date light during swinging. Is formed. Accordingly, the positions of the rotation shaft 55 of the shutter blade 50 and the date light incident shutter opening with respect to the subject light shutter opening 52 are not limited in the present invention.

  In the embodiment described with reference to FIG. 5, the subject light opening / closing portion 50a and the date light shutter member 60 are integrally provided. However, the present invention is not limited to this, as shown in FIG. The subject light opening / closing portion 91a and the date light shutter member 92 may be provided separately. In this case, the shutter member 92 is opened and closed in conjunction with the opening and closing of the shutter blades 91. The shutter member 92 is disposed on the front surface of the data light shutter opening 93 so as to be swingable about a shaft 94, and is normally pushed by a protrusion 91b provided on the shutter blade 91 to close the shutter opening 93. . When the shutter blade 91 opens and closes, the shutter member 92 rotates toward the position where the shutter opening 93 is opened by the bias of the torsion spring 95. During the rotation of the shutter blade 91 toward the closed position by the pull-back spring 96, the protrusion 91 b of the shutter blade 91 contacts the receiving portion 92 a provided on the shutter member 92. Since the torsion spring 95 has an urging force weaker than that of the pull-back spring 96, the shutter member 92 is directed toward the closed position against the urging of the torsion spring 95 after the protrusion 91b comes into contact. Rotate. Reference numeral 97 denotes a shutter opening for subject light.

  In the embodiment described with reference to FIG. 5, data light is created using natural light. However, the present invention is not limited to this, and date light is created using strobe light as shown in FIG. You may make it do. A light guide 98 is built inside the front cover 22 in this example. The light guide 98 has one end 98 a located on the front surface of the strobe light emitting unit 43 of the strobe unit 26 and the other end 98 b located on the front surface of the liquid crystal display unit 45 of the data module 27. A part of the strobe light emitted from the strobe light emitting unit 43 in response to the opening / closing of the shutter blades is incident on one end 98a of the light guide 98. The strobe light incident on the light guide 98 is guided while being totally reflected in the light guide 98 and reaches the other end 98b. The strobe light emitted from the other end 98 b enters the liquid crystal display unit 45. The strobe light transmitted through the liquid crystal display unit 45 is guided into the dark box as date light. In this case, it is preferable to set the strobe charging start button 9 to the one-push automatic recharging method so that the strobe shooting is always performed. According to this, the lighting window 6 of the front cover 22 can be omitted.

  The condensing lens 46 described with reference to FIG. 5 is sandwiched between the data module 27 and the front cover 22, but the positioning holding means of the present invention is not limited to this, and a known technique may be used. The condensing lens 100 shown in FIG. 22 is provided with a pair of positioning holes 100a and 100b on both sides of the lens unit that condenses the natural light incident from the daylighting window 6 on the liquid crystal display unit 45, and these holes 100a and 100b. Is inserted into the positioning pins 45a and 45b provided on both sides of the liquid crystal display unit 45 from the front side to be positioned at a predetermined position with respect to the liquid crystal display unit 45. These holes 100a and 100b and pins 45a and 45b constitute a positioning and holding means. The condenser lens 46 is sandwiched and held between the inner wall of the daylighting window 6 and the front surface of the data module 27 by attaching the front cover 22.

  After the data module 27 is attached, the condenser lens 100 is attached. This attachment is inserted into the liquid crystal display unit 45 from the front side. At the time of this insertion, the pair of holes 100 a and 100 b of the condenser lens 100 are fitted to the positioning pins 45 a and 45 b provided on both sides of the liquid crystal display unit 45. Thereby, the condenser lens 100 is positioned at a predetermined position on the front surface of the liquid crystal display unit 45. Thereafter, the front cover 22 is inserted from the front side and attached to the main body base 24. Thereby, the condensing lens 100 is clamped between the data module 27 and the inner wall of the lighting window 6. In this way, all the components such as the exposure unit 25, the strobe unit 26, the lens holder 48, the data module 27, the condenser lens 100, and the front cover 22 are unified into the main body base 24 from one direction. Therefore, for example, if it is assembled to the main body base 24 placed with the front side facing upward, all parts are inserted from above, and automated assembly can be performed easily.

  As another positioning and holding means, as shown in FIG. 23, a rib 101 is formed around the liquid crystal display unit 45, a step 102 is provided on the inner wall of the rib 101, and a condensing lens is provided on the step 102. Positioning may be performed by dropping 103 from the front side. The shape of the stepped portion 102 is a rectangular shape in the figure, but a circular shape or the like is preferable as the other shape. In this case, the outer shape of the condenser lens 103 is made to correspond to this shape.

  In each of the above embodiments, the date module and the imaging optical system are incorporated in the lens-fitted photo film unit. However, it goes without saying that the dating module and the imaging optical system can also be incorporated in an inexpensive camera using a kick-off type shutter mechanism. Absent.

It is a perspective view which shows the external appearance of the film unit with a lens which implemented this invention. It is an expanded view of an exterior body. It is a disassembled perspective view of a unit main body. It is a perspective view which shows the attachment form of a data module and an exposure unit. It is a perspective view which shows the outline of an imaging optical system. It is the perspective view which showed the attachment form of an imaging optical system and a harmful light blocking member. It is sectional drawing which shows the optical path of a data optical system. It is an expanded view which shows the Example which wants to use a paste-like exterior body. It is a perspective view which shows the Example using a cross-sectional crank-shaped data module. It is a perspective view of the Example which attached the button type battery to the data module in the state which turned this circular-shaped surface up. It is a perspective view which shows the Example which attached a part of imaging optical system to the harmful light blocking member. It is a perspective view which shows the Example which attached all the imaging optical systems to the harmful light shielding member. It is a perspective view which shows the Example which comprised the imaging optical system only with the imaging lens. FIG. 5 is a perspective view showing an embodiment in which a date light shutter opening is arranged on the upper right side with respect to a subject light shutter opening as viewed from the photographing lens side. It is a perspective view which shows the outline of the imaging optical system of the Example demonstrated in FIG. It is explanatory drawing explaining the comparison with the example which has arrange | positioned the shutter opening for date light in the upper right with respect to the shutter opening for object light seen from the imaging lens side, and the example arrange | positioned in the lower right. It is explanatory drawing explaining the principal part of the example which has arrange | positioned the shutter opening for date light in the lower right with respect to the shutter opening for object light seeing from the imaging lens side. It is explanatory drawing explaining the principal part of the example which has arrange | positioned the shutter opening for date light on the upper right with respect to the shutter opening for object light seeing from the imaging lens side. It is a perspective view which shows the Example which changed the opening / closing direction of the shutter blade | wing. FIG. 5 is a front view showing an embodiment in which a date light shutter member and a subject light shutter blade are separately provided. It is a perspective view which shows the Example which produced date light using strobe light. It is the perspective view which showed the Example which positions a condensing lens with a positioning pin and a positioning hole. It is the perspective view which showed the Example which positions a condensing lens according to this level | step-difference part according to this outline shape.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Film unit with a lens 2 Unit main body 3 Exterior body 5 Shooting window 6 Daylighting window 15 Bulging part 22 Front cover 23 Rear cover 27 Data module 28 Photo film cartridge 39 Shooting lens 47 Power supply battery

Claims (2)

A film storage chamber which is provided on one side of the exposure opening and in which unexposed photographic film is loaded in a roll shape, and a cartridge which is provided on the other side and which accommodates a cartridge for taking a photographed photographic film. A main body base each forming a loading chamber;
A photographing lens; a dark box disposed between the photographing lens and the exposure aperture; a subject light shutter mechanism disposed behind the photographing lens; and the subject light. An exposure unit having a data light shutter mechanism that opens and closes in conjunction with the opening and closing of the shutter mechanism
A front cover that is formed with a photographing window for taking in the subject light and a daylighting window for taking in outside light for data light, and is detachably attached to the base of the main body so as to cover the front surface of the exposure unit; ,
Positioning provided on the exposure unit having a transmissive liquid crystal display unit that displays the date automatically updated by a clock circuit that stores a calendar in advance and creates data light by passing the external light A data module positioned by means and removably incorporated between the front cover and the exposure unit;
An image forming optical system, which is detachably attached to the inside of the dark box and forms an image of the data light on the photographic film set in the exposure opening from the front surface. The data module is attached to the exposure unit, the imaging optical system is attached to the dark box, and the front cover is attached to the main body from the same direction as the attachment direction. The film unit with a lens according to claim 1.

Images