JPH1164951A - Film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a photographer from forgetting to turn off a stroboscope charging switch. SOLUTION: This film unit 2 is provided with a display light guide 10 projecting from the top surface of the film unit 2 linked with the sliding operation of a charging operation member 6 for charging a stroboscope. Then, the light of a display light emitting element for emitting the light after the charging of the stroboscope is completed is guided to the outside by the display light guide 10, so that the photographer can easily confirm that the charging of the stroboscope is continued.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film unit with a lens having a built-in flash device.

[0002]

2. Description of the Related Art A lens-equipped film unit in which a simple photographing mechanism is incorporated and a photographic film is pre-loaded is manufactured and sold by the present applicant. There are various types of such film units with a lens, and some include a flash device. The strobe device of a film unit with a lens includes a strobe light emitting portion including a discharge tube and a diffusion plate, a circuit board on which a strobe circuit for emitting the strobe light is formed, and a charge switch for strobe charging the strobe circuit. Consists of

[0003] The charge switch is simplified for low cost, and a metal contact is simultaneously brought into contact with a plurality of contact portions formed on a circuit board to close a strobe circuit. Start charging. As the operating member for bringing the metal contact piece into contact with the contact portion, a slide type having a locking mechanism capable of maintaining the metal contact piece in contact with the contact portion in a single operation, or a biasing member by a photographer A push button type or a slide type in which the metal contact piece is brought into contact with the contact portion only during the operation is used.

[0004] Further, in a flash device of a film unit with a lens, a light emitting element for emitting light is displayed in order to notify a photographer of the completion of charging of the flash. The light emitting element may be provided to face a display opening formed on the back of the lens-fitted film unit, or may be arranged so as to be visible in a finder via a light guide.

[0005]

Among the operation members of the above-mentioned charge switch, a slide-type charge switch having a locking mechanism ends photographing with the operation member set to the charging position, and causes a strobe device. In some cases, the battery used as the power supply became empty, and subsequent flash photography could not be performed. Such a problem can be originally prevented by checking the position of the operation member and the light emission display of the light emitting element before terminating the photographing. However, depending on the form of the film unit with the lens, the operation of the operation member may be prevented. In some cases, the state is difficult to understand, the light emission display of the light emitting element cannot be easily checked from outside the film unit with a lens, and the photographer often becomes unfamiliar with the operation of the film unit with a lens.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and is characterized by providing a lens-fitted film unit which prevents forgetting to turn off a strobe charging switch.

[0007]

In order to solve the above-mentioned problems, a film unit with a lens according to the present invention projects from the surface of the film unit with a lens in interlocking with the ON operation of a charging switch, and charging of a flash circuit is performed. A charging completion display means for displaying completion is provided.

[0008]

FIG. 2 shows an appearance of a film unit 2 with a lens according to the present invention when a strobe is not used. On the front of the film unit 2 with lens,
A photographing lens 3, an object-side finder window 4, a strobe light emitting section 5, a charging operation member 6, and a finder switching operation knob 7 are provided. Display light guide 1 constituting charge completion display means for displaying completion
An opening 11 and the like used for projecting the 0 are provided. On the rear side of the film unit 2 with a lens, a winding knob 1 that is operated to rotate each time one frame is shot.
2, an eyepiece side finder window 13 (see FIG. 3) and the like are provided.

The charging operation member 6 is vertically slidable between an off position shown in FIG. 2 and an on position shown in FIG. 1, and is slid to an upper on position when performing flash photography. Operate and slide to the lower off position when not using flash photography. When the charging operation member 6 is slid to the ON position, the opening 11 formed on the upper surface of the lens-fitted film unit 2 causes
As shown in FIG. 1, the display light guide 10 is protruded. The display light guide 10 emits light when the flash charging is completed, and notifies the photographer and the subject that the flash charging is completed.

As shown in FIG. 3, the lens-fitted photo film unit 2 comprises a main body 18 in which a film cartridge 17 comprising an unexposed photographic film 15 and a substantially cylindrical cartridge main body 16 is loaded. And a front cover 21 and a rear cover 22 that are assembled so as to cover the front side and the back side of the main body 18, respectively. Assembled by pawl engagement.

At the center of the main body 18, there is provided a light-shielding tube 24 which shields the photographing optical path from the exposure unit 19 mounted on the front side to the photographic film 15.
An exposure opening 24a is formed on the front side of the light-shielding tube 24, and an aperture for defining an exposure range to the photographic film 15 is formed on the back side. On the left and right sides of the light-shielding tube 24, a cartridge chamber 25 and a film roll chamber 26 in which the cartridge body 16 and the rolled photographic film 15 are stored at the manufacturing stage are integrally formed.

A take-up knob 12 and a light-shielding lid closing mechanism 2 for closing the light-shielding lid 16a incorporated in the cartridge main body 16 when the cartridge main body 16 is taken out of the film unit 2 with the lens are provided above the cartridge chamber 25.
7 are attached. The winding knob 12 and the light shielding cover closing mechanism 27 are connected to the spool 16b of the cartridge body 16 and the light shielding cover 16a through the cartridge chamber 26.
And engage.

The cartridge chamber 25 and the film roll chamber 26 have a rear cover 22 attached to the rear side of the main body 18, and a bottom lid 28 for the cartridge chamber integrally formed with the rear cover 22 and a film roll chamber. When the bottom cover 29 is closed, an appropriate light shielding ability is obtained. The bottom lids 28 and 29 are connected to the rear cover 22 via a flexible thin portion, and the bottom lid 28 is used to remove the used film unit 2 from the lens-equipped film unit 2.
Opened when taking out 7. A film support surface 2 for supporting the rear surface of the photographic film 15 facing the aperture of the main body 18 is provided at a central portion on the inner surface side of the rear cover 22.
2a is formed.

A mark imprinting mechanism for imprinting a mark indicating a print range on the photographic film 15 is incorporated on the front surface of the main body 18 and on the outer periphery of the light shielding tube 24.
Although not shown in detail, the mark imprinting mechanism includes two imprinting openings formed below the light-shielding tube 24 of the main body 18, and opening and blocking these openings to form an imprinting mark. A mark switching plate for switching, a light guide for imprinting, which guides light from a light emitting element for imprinting a mark attached to the strobe unit to an opening for imprinting, a light-shielding cover 31 for shielding these, and a light-shielding tube 24
And a pivot lever 33 that pivots in conjunction with the movement of a field switching plate 32 (see FIG. 4) described later and moves the mark imprinting plate.

The exposure unit 19 has a block-shaped base member 35 attached to the front surface of the light-shielding tube 24, a shutter charging mechanism, a shutter release mechanism, a film winding mechanism, a film counting mechanism, a photographing lens 3, a finder optical system, and the like. It is assembled and unitized.

The strobe unit 20 is a circuit board 3 on which a plurality of electric parts are mounted to form a strobe circuit.
7 and the discharge tube 38 attached to the circuit board 37.
(See FIG. 5) and a holding member 39 for holding the discharge tube 38
And a strobe light emitting unit 5 including a diffusion plate 40 for diffusing light from the discharge tube 38, and battery contact pieces 42a and 42b attached to the circuit board 37 and electrically connecting a dry battery 41 serving as a power source of the strobe unit 20. , Film roll room 26
A metal contact piece 43 which is attached to the front surface of the exposure unit 19 and which contacts the circuit board 37 by the sliding operation of the charging operation member 6 to the ON position and causes the strobe circuit to perform strobe charging. A synchro switch 44 which is turned on in conjunction with the release operation of the release mechanism.

As shown in FIG. 4, the front cover 21 includes a front cover body 45 and a front panel 46 attached to the front of the front cover body 45.
A finder opening 47 having the same shape as the object-side finder window 4 formed in the front panel 46 is formed in the front panel 46. Further, between the front cover body 45 and the front panel 46, the charging operation member 6, the visual field switching plate 32, and the toggle spring 50 are attached.

The field switching plate 32 is formed in a substantially disc shape by the same plastic as the front cover body 45 and the front panel 46. A circular opening 52 formed in the center portion is formed on the front surface of the front cover body 45. The front cover body 4 is fitted into the outer periphery of the formed lens barrel 49.
5 so as to be freely rotatable. This view switching plate 32
The coil part 50a formed on one end is
5 and the other end 50b is inserted into the hole 54 of the visual field switching plate 32 by the toggle spring 50.
It is urged clockwise and counterclockwise across the intermediate position.

At the lower part of the front surface of the visual field switching plate 32, a boss 56 is provided.
The boss 56 is formed integrally with the front panel 4.
6, an arc-shaped slit 5 formed below the convex portion 57
8 is inserted. A finder switching knob 7 larger than the boss 56 is attached to the boss 56 inserted into the slit 58 from the front side of the front panel 46. As described above, by using the field switching plate 32 and the finder switching operation knob 7 as separate components, the width of the slit 58 can be reduced without sacrificing the operability of the finder switching operation knob 7, and the lens The light shielding ability in the attached film unit 2 can be maintained.

On the outer peripheral portion of the field switching plate 32, between the objective side finder window 4 and the finder opening 47, the objective side finder lens 61a incorporated in the exposure unit 19 is provided.
A finder frame 62 for a panorama size (P size) having an aspect ratio of 3.0 and a finder frame 63 for a C size having an aspect ratio of 1.5, which are switching finder frames inserted and removed in front of (see FIG. 3). Is formed. A cutout portion 64 is formed between the panoramic finder frame 62 and the C size finder frame 63 to open between the objective finder window 4 and the finder opening 47, which are standard finder frames. .

In the film unit 2 with a lens according to the present embodiment, the high definition size (H) having an aspect ratio of 1.8 is used.
Size) as a standard size, and the object side finder window 4 which is a standard finder frame has an aspect ratio of 1.8. For this reason, the film unit 2 with the lens at the start of use has the notch 64 of the field switching plate 32 facing the finder window 4 on the objective side.
Is opened between the finder opening 47 and the view range H
Size.

Further, the finder switching operation knob 7 is operated to rotate the visual field switching plate 32, and the C size finder frame 63 is moved to the eyepiece side finder window 4 and the finder opening 47.
When the finder frame 62 for P size is inserted between the eyepiece side finder window 4 and the finder opening 47, the field of view becomes P size.

On the outer periphery of the opening 52 of the visual field switching plate 32, a cam groove 66 having a bent shape with a distance from the center of the opening 52 being changed is formed. The cam groove 66 has a rotating lever 3 attached to the main body 18.
The pin 67 a formed on one of the two arm portions 67, 68 formed in the third arm portion 67 is inserted.
As a result, the rotation lever 33 rotates in conjunction with the rotation of the visual field switching plate 32, and the mark switching plate of the mark recording mechanism records the mark matching the viewfinder visual field on the photographic film 15. Further, the rotation range of the view switching plate 32 is regulated by the pin 67a of the rotation lever 33, and is further positioned at each view range position.

The charging operation member 6 includes an operation section 70 exposed from the front cover 21 and actually operated, and a front cover main body 4.
5 and an engaging portion 74 inserted into a slit 72 formed on the front surface of the front cover main body 45 and engaged with a pin 73 formed integrally with the display light guide 10. Consists of The charging operation member 6 is vertically slidable along the slit 72 of the front cover main body 45.

The substrate portion 71 has a vertically extending slit 76 formed therein, into which a pin 77 projecting from the front surface of the front cover body 45 is inserted.
Then, when the charging operation member 6 slides in the vertical direction, the two concave portions formed on the inner wall surface of the slit 76 engage with the pins 77 to give a click feeling to the sliding operation of the charging operation member 6. In addition, the narrow slit 78 formed on the side of the slit 76 is provided to impart elasticity to the slit 76.

The operation unit 70 is provided with an opening 48 of the front cover body 45.
And a projection (not shown) for pressing the metal contact piece 43 of the strobe unit 20 through the opening 48 when slid upward. The metal contact piece 43 has three contact pieces 43a, 43b,
The contact pieces 43a to 43c are brought into contact with three contact portions 37a, 37b, and 37c formed on the circuit board 37, respectively, when pressed by the operation unit 70. These contact portions 37a to 37c and metal contact piece 43
Is composed of a charging switch 80 for causing the flash circuit to perform flash charging, and a flash inhibition switch 81 (see FIG. 5) for inhibiting flash emission.
Performs strobe charging continuously while the charging operation member 6 is slid upward.

FIG. 5 is a circuit diagram of a flash circuit formed on the circuit board 37. The strobe circuit is roughly divided into an imprint lamp lighting section 83, a boosting section 84, and a charging / light emitting section 85. The imprint lamp lighting section 83 is a circuit that turns on the imprint light emitting element 86 in conjunction with the synchro switch 44. The booster 84 includes a dry battery 41 serving as a power supply source, an oscillation transistor 87, and an oscillation transformer 8
8, a charging diode 89, a stop transistor 90, a display light emitting element 91, and the like.

Oscillation transistor 87 and oscillation transformer 88
Constitutes a known blocking oscillation circuit. When the charging switch 80 is turned on, a base current flows into the oscillation transistor 87, and the oscillation transistor 87 starts operating. When the oscillation transistor 87 starts operating, it oscillates by the positive feedback action from the oscillation transformer 88.

The secondary coil 93 of the oscillation transformer 88 includes:
During the oscillation of the oscillation transistor 87, a high voltage electromotive force is generated according to the winding ratio between the primary coil 94 and the secondary coil 93. The charging diode 89 supplies only the secondary current flowing in one direction due to the electromotive force to the charging / light emitting unit 85.

The stop transistor 90 has a base terminal connected to the Zener diode 96. The charging voltage of the main capacitor 97 is applied to the Zener diode 96, and a Zener current flows when the charging voltage reaches a specified charging voltage. When the Zener diode 96 does not flow the Zener current, the stop transistor 90 makes the emitter-collector non-conductive because the base current does not flow, but when the Zener diode 90 flows the Zener current. , A voltage higher than the operating voltage is applied between the emitter and the base, and a zener current flows as a base current. When the stop transistor 90 becomes like this, the base terminal and the emitter terminal of the oscillation transistor 87 become equipotential, and the oscillation of the oscillation transistor 87 is stopped. In addition, with the flash charging start switch 80 turned on,
When the charging voltage of the main capacitor 97 becomes equal to or lower than the specified charging voltage, the oscillation transistor 87 starts oscillating again. When the charging voltage of the main capacitor 97 reaches the specified charging voltage, the display light emitting element 91 is turned on.

The charging / light emitting section 85 is provided with the main capacitor 9
7, a discharge tube 38, a trigger electrode 99, a trigger capacitor 100, a trigger transformer 101, a synchro switch 44, a charge switch 80, a light emission inhibition switch 81, and the like provided inside the strobe light emitting section 5. The main capacitor 97 has both terminals connected to both electrodes of the discharge tube 38 and a negative terminal connected to the cathode of the charging diode 89.

The current (secondary current) supplied from the booster 84 charges the main capacitor 97 and also charges the trigger capacitor 100. The synchro switch 44 is opened and closed in conjunction with the operation of the shutter, and is turned on when the shutter is fully opened. When the synchro switch 44 is turned on, the trigger capacitor 100 is discharged, and the discharged current flows through the primary coil 103 of the trigger transformer 101. Thereby, the secondary coil 104
Trigger voltage of high voltage is generated. This trigger voltage is applied to the discharge tube 38 via the trigger electrode 99. By the application of the trigger voltage, the Xe gas inside the discharge tube 38 is ionized, the resistance between the two electrodes of the discharge tube 38 is broken, and the main capacitor 97 is discharged to discharge the discharge tube 38.
Emits light.

The imprinting light emitting element 86 is provided with the synchro switch 44 regardless of the light emission of the discharge tube 38.
Is turned on to print a mark indicating the print size on the photo film 15.

The light emission inhibition switch 81 opens and closes a discharge circuit (a loop shown by a thick line) including the trigger capacitor 100, the primary coil 103 of the trigger transformer 101, and the synchro switch 44. In this circuit, the trigger capacitor 100 is discharged in conjunction with the turning on of the synchro switch 44, and this discharge current flows through the primary coil 103 of the trigger transformer 101. Therefore, by opening this circuit, the discharge of the trigger capacitor 101 is prohibited.

The light emission inhibition switch 81 is also arranged on a circuit for charging the main capacitor 97 and the trigger capacitor 100. Therefore, when the switch 81 is turned off, charging of the main capacitor 97 and the trigger capacitor 100 is also prohibited. The charge switch 80 and the light emission prohibition switch 81 have a common terminal on the minus side terminal.

In the above-mentioned flash circuit, while the charging switch 80 and the light emission prohibiting switch 81 are ON, the next flash charging is continuously started after the flash light emission is performed. Also, the charge switch 80 and the light emission inhibition switch 8
As long as 1 is on, the operation of the blocking oscillation circuit is continued even if the charging of the main capacitor 97 is completed, so that the display light emitting element 91 continues to light.

As shown in FIGS. 6, 7, 8, and 9, the display light guide 10 is formed using a transparent plastic, and has a mounting portion 111 including a cylindrical mounting hole 110;
And a guide section 112 for internally reflecting and guiding the light of the display light emitting element 91. The attachment section 111 is attached to a lens holder section 113 provided integrally with the base member 35 of the exposure unit 19 for holding the finder lenses 61a and 61b. The lens holder 113 includes
A guide pin 114 inserted into the mounting hole 110 of the display light guide 10 and a support rail 115 for supporting the back surface of the guide portion 112 are formed integrally. A holding plate 11 for holding the mounting portion 111 is provided below the guide pin 114.
6 are provided integrally.

When the guide portion 112 is slid upward by the operation of the charging operation member 6, the display light emitting element 9 is moved.
1, a first reflection surface 118 for receiving light from the display light emitting element 91, a second reflection surface 119 for reflecting the light reflected by the first reflection surface 118 upward, and a second reflection surface. A light radiating unit 120 that radiates the light reflected by the surface 119 to notify the photographer and the subject of the completion of charging;
And a finder reflecting surface 121 for reflecting the light reflected by the reflecting surface 119 toward the optical axis of the finder optical system.

The light radiating section 120 includes display reflecting surfaces 120a and 120b for reflecting light on the front side and the rear side of the lens-fitted film unit 2, so that the photographer and the photographer can simultaneously complete the strobe charging. You can know. Thus, the photographer can proceed to the photographing operation, and the photographed person can confirm that the photographing preparation is completed and prepare for photographing. In addition, since the light from the display light emitting element 91 can be confirmed by looking through the finder reflecting surface 121 while looking through the finder, it is possible to know the completion of strobe charging while performing framing.

Next, the operation of the above embodiment will be described. When the film winding operation is performed by rotating the winding knob 12 of the film unit with lens 2 shown in FIG. 2, the spool 16b of the cartridge body 16 shown in FIG. Then, the shutter mechanism of the exposure unit 19 charges the shutter. The photographer slides the finder switching operation knob 7 in accordance with the print size to be photographed.

When the finder switching operation knob 7 is slid, as shown in FIG. 4, the view switching plate 32 connected to the finder switching operation knob 7 is moved to the front cover body 4.
Between the photographing lens 3 and the front panel 46, the camera 1 rotates. Although not shown, three types of indices (H size, P size, and C size) for matching the finder switching operation knob 7 are provided outside the slit 58 in which the finder switching operation knob 7 moves. When the switching operation knob 7 is set to one of the indices, the visual field switching plate 32 is positioned, and the P size finder frame 62 formed on the outer peripheral portion of the visual field switching plate 32 or
Either the C-size finder frame 63 or the notch 64 switches the visual field range facing the object-side finder window 4.

Further, in conjunction with the rotation of the visual field switching plate 32, the rotation lever 33 engaged with the cam groove 66 rotates. The pivoting lever 33 slides a mark switching plate constituting a mark imprinting mechanism incorporated below the light-shielding cylinder 24 shown in FIG. 3 to open and close two imprinting openings, thereby providing a viewfinder view. Photo film 1 with the matching mark
5 so that it can be copied.

When photographing is performed without using a strobe, framing is performed using the finder and the shutter button 8 is pressed. Then, the shutter mechanism of the exposure unit 19 performs a release operation, and in conjunction with this, the synchro switch 44 is turned on. When the synchro switch 44 is turned on, the light emitting element 86 for imprinting a mark is lit for a certain period of time irrespective of the use of the strobe, and the mark representing the print size selected at that time is displayed in the photo film 1.
The image is captured outside the range of the shooting frame of No. 5.

When performing flash photography, as shown in FIG. 1, the charging operation member 6 is slid toward the upper charging position. When the charging operation member 6 is slid upward, the recess formed in the slit 76 of the substrate 71 formed integrally with the charging operation member 6 and the front cover body 45.
The click feeling can be obtained by engagement with the pin 77 on the front surface of the device, so that the completion of the slide operation can be easily confirmed.

When the charging operation member 6 slides upward,
As shown in FIG. 8, the display light guide 10 housed in the lens-fitted film unit 2 is configured such that the engaging portion 74 of the charging operation member 6 has the pin 73 of the display light guide 10.
By moving upward in the slit 72 in a state in which is engaged, as shown in FIG. 9, it moves upward along the guide pin 114 and the support rail 115. As a result, the light emitting portion 120 of the display light guide 10 projects out of the film unit with lens 2 from the opening 11, and the first reflection surface 118 faces the light emitting element 91 for display.

A projection (not shown) formed on the back surface of the operation section 70 of the charging operation member 6 passes through the opening 48 of the front cover body 45 and the metal contact piece 43 of the strobe unit 20.
Press. Thereby, the contact piece 43a of the metal contact piece 43
To 43c contact the contact portions 37a to 37c of the circuit board 37, the charge switch 80 and the light emission inhibition switch 81 of the strobe circuit shown in FIG.
The oscillation circuit 88 and the oscillation transformer 88 start the oscillation operation.

The secondary current caused by the high voltage electromotive force generated in the secondary coil 93 during the oscillation operation is supplied to the charging diode 8
The power is supplied to the charging / light emitting unit 85 via the power supply 9, and the main condenser 97 and the trigger condenser 100 are charged here.

When the charging of the main capacitor 97 proceeds,
The voltage between the terminals of the main capacitor 97 increases. For this reason, the load on the secondary coil 93 increases, and the secondary current hardly flows, the voltage of the electromotive force and the back electromotive force of the secondary coil 93 decreases, and the oscillation frequency of the oscillation circuit increases. .

As a result, a reverse voltage is applied to the Zener diode 96. When the main capacitor 97 reaches the specified charging voltage, the Zener diode 96
, A Zener voltage flows, and a Zener current flows. The Zener current flows as the base current of the stopping transistor 90, so that the stopping transistor 90 is turned on.

When the stop transistor 90 is turned on, the base and the emitter of the oscillation transistor 87 are connected by the stop transistor 90 to have the same potential, and the oscillation transistor 87 is turned off. When the oscillation transistor 87 is turned off, no current flows through the primary coil 94 of the oscillation transformer 88, and thus the charging of the main capacitor 97 stops.

When the main capacitor 97 is charged to the specified charging voltage, the display light emitting element 91 turns on. The light emitted from the display light emitting element 92 is incident on the first reflection surface 118 and is incident on the second reflection surface 1 as shown in FIGS.
The light is reflected toward the light emitting portion 19, is reflected on the second reflecting surface 119, and enters the light emitting portion 120. The light incident on the light emitting unit 120 is reflected by the reflecting surfaces 120a and 120b for display and is simultaneously radiated toward the front side and the back side of the film unit 2 with a lens. At the same time, it is possible to confirm the completion of flash charging. Thus, the photographer can proceed to the next photographing operation, and the photographed person can confirm that the photographing preparation is completed and prepare for photographing.

The light reflected by the second reflecting surface 119 also enters the finder reflecting surface 121, so that the light of the display light emitting element 91 can be confirmed even when looking through the finder. You can know the completion of strobe charging even while performing.

When the photographer presses the shutter button 8,
The shutter mechanism of the exposure unit 19 performs a release operation, and in conjunction with this, the synchro switch 44 is turned on. When the synchro switch 44 is turned on, the trigger capacitor 1
00 is discharged, and a current caused by this discharge flows through the primary coil 103 of the trigger transformer 101 and the secondary coil 104.
Trigger voltage is generated. This trigger voltage is applied to the discharge tube 38 via the trigger electrode 99. As a result, the main capacitor 97 is placed between both electrodes of the discharge tube 38.
Is discharged, the discharge tube 38 emits light, and the strobe light is emitted from the strobe light emitting section 5 toward the subject.

The light reflected from the subject passes through the taking lens 3 and is exposed to the photographic film 15 set in the aperture, thereby forming a photographic frame. At the same time as the synchro switch 44 is turned on, the light emitting element 86 for imprinting a mark is turned on for a certain period of time, and the mark representing the print size selected at that time is imprinted outside the photographing frame range of the photo film 15.

After the photographing, if the charging operation member 6 is set to the charging position, the strobe charging for the next photographing is automatically started. Further, while the charging operation member 6 is slid to the upper charging position and the charging switch 80 and the light emission inhibition switch 81 are turned on, the operation of the blocking oscillation circuit continues even if the charging of the main capacitor 97 is completed. Since the display light emitting element 91 continues to be lit, it is possible to surely confirm that the charging operation member 6 is at the charging position at the time of ending the shooting, so that the dry battery 41 is wasted and the flash shooting is performed at the next shooting. There is no problem that can not be done.

In the display light guide 10 of the above embodiment, the display reflecting surfaces 120a and 120b are
12, the display reflecting surface 1 is directly provided on the upper part of the guide portion 112, as shown in FIG.
20a and 120b may be provided.

Further, as shown in FIG. 11, the light emitting portion 130 gradually narrows toward the upper end, and as shown in FIG. The radiating section 132 and the light radiating section 13 as shown in FIG.
A light emitting portion 134 having a concave portion 133 formed at the tip of zero can also be used.

Further, as shown in FIG. 14, a light emitting portion 140 having a cylindrical portion 136 formed in the center and radially provided with cutouts 137 and ribs 138 around the cylindrical portion 136 can also be used. Further, the shape of the light emitting portion is not limited to these, and any shape may be used as long as the light is emitted so that the photographer and the subject can simultaneously check the light of the light emitting element.

Further, each of the above-mentioned display light guides is made of a colorless and transparent plastic, for example, polystyrene, but is made of a transparent plastic or glass containing translucent colors such as blue, red, and green. You may. Alternatively, the light guide may be formed of a colorless transparent or translucent material, and a colored light emitting element may be used. Further, a translucent plastic mixed with a light diffusing agent may be used. Further, the light guide and the charging operation member may be formed integrally.

In each of the above embodiments, the display light emitting element 91 is mounted on the circuit board 37 of the strobe unit 20, and the display light guide facing the light emitting element 91 is slid to move the display light guide outside the lens-fitted film unit 2. To protrude. However, as shown in FIG. 15, the display light emitting element 91 is held by the holding member 150 made of transparent plastic which moves in the same direction in conjunction with the sliding operation of the charging operation member 6, and this display light emission is performed. The element 91 can emit light directly outside the lens-fitted film unit 2 to indicate the state of strobe charging. The same parts as those in the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 16, when the charging operation member 6 is slid to the upper charging start position, the charging operation member 6
The holding members 150 locked in the same direction move together in the same direction. The terminal 91a of the display light emitting element 91 is bent and abuts on the circuit board 37, and is formed on the circuit board 37 when the light emitting element 91 moves to the light emitting display position protruding out of the film unit 2 with the lens. The conductive surface 152 is contacted. A current flows through the conductive surface 152 after charging is completed. When the flash charging is completed, the display light emitting element 91 emits light to notify the photographer and the subject of the completion of the flash charging. Holding member 150
Is integrally provided with a cover part 150a for protecting the display light emitting element 91, and is formed of a transparent plastic so as to transmit light emitted by the display light emitting element 91.

According to the above-described embodiment, the intensity of light expressing the state of charge of the strobe can be made stronger than the case where the light is emitted to the outside via the light guide. Can be confirmed. In addition, the terminal 91a of the display light emitting element 91 and the conduction surface 152 can be used as a power switch of a flash circuit.

In addition to bringing the terminal 91a into contact with the conductive surface 152 of the circuit board 37 by moving the display light emitting element 91, the terminal 91a is connected to the strobe of the circuit board 37 through a flexible and long wiring cable. The wiring may be connected to a circuit to absorb the movement of the display light emitting element 91 by a wiring code.

[0064]

As described above, according to the film unit with the lens of the present invention, the charge state of the strobe circuit can be easily and clearly known by the charge completion display means. Therefore, there is no problem that the dry battery is wasted and the flash photography cannot be performed at the next photography.

Further, the charging completion display means is composed of a light emitting element and a light guide, and the light guide is slid together with the charging operation member so as to protrude out of the film unit with the lens, so that a complicated mechanism or the like is used. It can be adopted at low cost without any cost.

Further, since the light guide is provided with at least two or more light-emitting surfaces so that the photographer and the subject can confirm the completion of charging, the photographer can easily check the light guide to perform the next photographing operation. The subject can be prepared to be photographed. Further, since the light guide is made to protrude from the upper surface of the film unit with the lens, the light guide can be easily and surely visually recognized even when the film unit with the lens is held in the vertical position.

Further, by protruding the light emitting element directly from the surface of the film unit with a lens, the intensity of light expressing the strobe charging state can be increased as compared with the case where a light guide is used. You can check the flash charging status even for a subject that has been flashed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of a film unit with a lens according to the present invention in a flash photography state.

FIG. 2 is a perspective view showing an external appearance of the film unit with a lens according to the present invention in a non-flash photographing state.

FIG. 3 is an exploded perspective view showing a configuration of a film unit with a lens.

FIG. 4 is an exploded perspective view showing a configuration of a front cover.

FIG. 5 is a circuit diagram of a strobe circuit.

FIG. 6 is an exploded perspective view showing an attached state of a display light guide.

FIG. 7 is a perspective view illustrating an appearance of a display light guide.

FIG. 8 is a sectional view of a main part of a film unit with a lens in a non-flash photographing state.

FIG. 9 is a cross-sectional view of a main part of the film unit with a lens in a flash photography state.

FIG. 10 is a perspective view illustrating an appearance of a display light guide according to a second embodiment.

FIG. 11 is a perspective view illustrating an appearance of a display light guide according to a third embodiment.

FIG. 12 is a perspective view illustrating an appearance of a display light guide according to a fourth embodiment.

FIG. 13 is a perspective view illustrating an appearance of a display light guide according to a fifth embodiment.

FIG. 14 is a perspective view illustrating an appearance of a display light guide according to a sixth embodiment.

FIG. 15 is a cross-sectional view of a main part illustrating a non-strobe charging state of a charging completion display unit according to another embodiment.

FIG. 16 is a cross-sectional view of a main part showing a flash charging state of charging completion display means of another embodiment.

[Explanation of symbols]

 2 Film unit with lens 5 Strobe light emitting unit 6 Charging operation member 10 Display light guide 19 Exposure unit 20 Strobe unit 37 Circuit board 91 Display light emitting element 120, 130, 132, 134, 140 Light emitting unit

(72) Inventor Mitsuhiro Moriya 210 Nakanakanuma, Minamiashigara, Kanagawa Prefecture Fuji Photo Film Co., Ltd. (72) Inventor Keiji Uchiyama 210 Nakanuma, Minamiashigara City, Kanagawa Fuji Photo Film Co., Ltd.

Claims (6)

[Claims] 1. A lens having a photographing mechanism such as a shutter mechanism and a photographing lens, a strobe circuit including a strobe circuit, and a charging switch for causing the strobe circuit to perform strobe charging, wherein a photographic film is loaded in advance during manufacture. A film unit with a lens, characterized in that the film unit with a lens is provided with charging completion display means for projecting from the surface of the film unit with a lens in interlocking with the ON operation of the charging switch and displaying a charging state of a flash circuit. 2. The charging completion display means includes: a light emitting element that emits light for expressing a state of charge; 2. The film unit with a lens according to claim 1, further comprising a light guide for guiding the film unit to the outside. 3. A portion of the light guide protruding from the lens-equipped film unit is guided so that a photographer and a subject can visually recognize the light emitted from the light emitting element and grasp the charged state. The lens-equipped film unit according to claim 2, further comprising a light radiating portion for radiating light. 4. The charging switch includes a charging operation member slidable between a charging start position and a non-charging position, and the light guide slides integrally with the charging operation member to move the lens. 4. The lens-fitted film unit according to claim 2, wherein the lens-fitted film unit protrudes outside the attached film unit. 5. The film unit with a lens according to claim 2, wherein the light guide protrudes from an upper surface of the film unit with a lens. 6. The charging completion display means comprises a light emitting element which emits light for expressing a charging state and which protrudes from the surface of the film unit with a lens in conjunction with an ON operation of a charging switch. The film unit with a lens according to claim 1.