JPH0862677A - Stroboscopic device and film unit with lens using it - Google Patents

Abstract

PURPOSE: To prevent a red-eye phenomenon from occurring and to facilitate charging operation without increasing the number of parts. CONSTITUTION: A main capacitor 17 is horizontally arranged at the upper part of a printed board 13. A light emission part unit 12 is constituted by integrally housing a discharge tube, a reflector and a diffusion plate. An aperture 21a whose diameter is almost identical to the capacitor 17 is formed at the back part of the unit 12. The unit 12 is integrally fitted to a board part 11 by inserting the capacitor 17 in the aperture 21a. Besides, the unit 12 is turned with the capacitor 17 as a shaft. Then, when the front surface thereof is turned upward, a charging switch 18 is turned on and the capacitor 17 is charged. When it is turned downward, the switch 18 is turned off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strobe device that prevents the occurrence of the red-eye phenomenon and is easy to charge, and a lens-fitted film unit using this strobe device.

[0002]

2. Description of the Related Art In order to easily enjoy taking photographs, the applicant of the present invention manufactured a lens-fitted photo film unit in which a photo film was previously built in a unit body incorporating a photo-taking mechanism such as a taking lens and a shutter device. It is sold. The lens-fitted film unit is generally widely used because it allows the user to take a photograph immediately on the spot of purchase, and since it is convenient that the lens-fitted film unit can be taken out to a development handling shop as it is after the photographing. Among such film units with a lens, there are those equipped with a strobe device, such as "Sharp Run Flash" (product name). The strobe device used for the lens-fitted photo film unit has a simplified structure because it needs to be as low cost as possible, and has been made compact in consideration of being stored in the limited space of the lens-fitted photo film unit. Is being pursued.

The strobe device used in the lens-fitted film unit is composed of a printed circuit board on which a control circuit for charging or discharging is formed, and a light emitting portion for emitting strobe light. The light-emitting unit basically receives a trigger signal to emit light, a reflector that reflects the light projected from the discharge tube forward, and diffuses the light emitted forward. It is composed of three parts, a diffuser and a diffuser. Further, the printed circuit board is provided with a dry battery for power supply, a main capacitor for strobe emission, and a printed contact in which a part of the charging circuit is opened. While the strobe charging switch provided on the lens-fitted film unit is being pressed, the printed contacts are short-circuited and the main capacitor is charged.

[0004]

However, in the lens-fitted film unit incorporating the above-described strobe device, when performing stroboscopic photography, the strobe charging switch must be continuously pressed until the main capacitor is fully charged. I won't. Also, in the case of continuous flash photography such as wedding receptions held indoors, you have to press the strobe charge switch every time you shoot to prepare for shooting. It feels very annoying.

On the other hand, it is known that a so-called red-eye phenomenon occurs when stroboscopic photography is performed with a person as a subject. This red-eye phenomenon is caused by the fact that the retina of the eye emits red light when it reflects strobe light, and when the optical axis of the subject light entering the shooting lens and the optical axis of strobe light are too close together. Remarkably appears. In order to prevent the occurrence of such a red-eye phenomenon, for example, as is known in Japanese Patent Laid-Open No. 6-43535, the stroboscopic light emitting portion is pulled out to the outside of the camera body when stroboscopic photography is performed, and the optical axis of the stroboscopic light is the optical axis of the subject light. There is a camera that I tried to keep away from.

However, the above-mentioned camera requires a special moving member in order to pull out and store the strobe light emitting portion, so that the structure of the strobe device tends to be complicated and expensive, and this moving member is also required. The storage space inside the camera is also increased due to the increase in. Further, the light emitting portion and the electric circuit portion of the strobe device are formed as separate bodies, and the wiring is connected after the light emitting portion and the electric circuit portion are assembled in the camera, so that the assembly is complicated. For this reason,
It is unsuitable to use the strobe device with the above-mentioned countermeasure against red eye in the lens-fitted film unit, which is required to be significantly reduced in cost as compared with a general camera.

The present invention has been made in consideration of the above circumstances, and a strobe device capable of preventing the occurrence of the red eye phenomenon and simplifying the charging operation without increasing the number of parts, and this strobe device. An object of the present invention is to provide a film unit with a lens using

[0008]

In order to achieve the above object, the strobe device of the present invention emits strobe light, and a substrate part on which a strobe circuit for controlling charging and discharging of a main capacitor is mounted. A discharge tube, a reflector that collects the light emitted from the discharge tube toward the front, and a light-emitting unit that integrally includes a diffusion plate that diffuses the light emitted toward the front. The sub-unit is rotatably attached to the main condenser.

The lens-fitted film unit according to the second and third aspects is a discharge tube that emits strobe light, a reflector that collects the light emitted from the discharge tube forward, and a forward direction. A light-emitting unit is configured by integrally providing a diffusion plate that diffuses the light emitted toward the light-emitting unit, and a storage position where the light-emitting unit is stored inside the unit body,
It is attached to the main capacitor so that it can rotate freely between the shooting position protruding from the unit body, and when the light emitting unit is in the shooting position, the charging circuit is activated to charge the main capacitor. A switch is provided to stop the operation of the charging circuit when is in the storage position. Further, it is preferable that an opening for exposing a part of the light emitting unit is formed in the outer wall of the unit body, and the outer wall of the light emitting unit exposed through the opening also serves as the outer wall of the unit body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows the structure of a flash device according to the present invention. The strobe device 10 includes a substrate portion 11 and a light emitting unit 12 that emits strobe light. The board unit 11 is a printed circuit board 13 on which a control circuit for charging and discharging is mounted.
A battery holder 15 for holding 4 and a synchro contact 16 that is short-circuited by the opening operation of the shutter blades are attached. A cylindrical main capacitor 17 is soldered in a horizontal direction on the upper portion of the printed circuit board 13 via two terminals 17a and 17b. Below the main capacitor 17, the main capacitor 17 is connected to the main capacitor 17. A charging switch 18 is provided for operating the charging circuit. The charging switch 18 includes two contact pieces 18a, 1
8b are arranged vertically, the upper contact piece 18a has a short length, and the lower contact piece 18b is long so as to protrude from the side edge portion of the printed circuit board 13. Also, the contact piece 18
The a and 18b are provided so as to contact each other in the natural state.

As shown in FIG. 2, the light emitting unit 12 accommodates a discharge tube 22 that emits strobe light to the front inside of the housing 21, and a reflector 23 that covers the back side of the discharge tube 22. A diffusing plate 24 is attached to the open front surface of the housing 21. Housing 21
The upper wall surface is formed flat, and the groove 25 is formed on the rear end side. Further, an opening 21a having substantially the same diameter as that of the main capacitor 17 is formed in the rear portion of the housing 21, and the light emitting unit 12 causes the main capacitor 1 to be inserted by inserting the main capacitor 17 into the opening 21a.
It is attached to 7. Terminal 17 of the main capacitor 17
Since a and 17b have a large diameter and strength and can hold the main capacitor 17 in a horizontal direction, the main capacitor 17 can be used as a rotating shaft of the light emitting unit 12. In addition, the light emitting unit 12
Is arranged so as to be placed on the contact piece 18b of the charging switch 18, and when the front surface of the light emitting unit 12 is turned downward, the bottom wall of the housing 21 presses the contact piece 18b downward. The charging switch 18 is turned off. On the other hand, when the front surface of the light emitting unit 12 is rotated so as to face upward, the pressing of the contact piece 18b by the housing 21 is released, the charging switch 18 is turned on, and the main capacitor 17 is charged with electric charge for strobe light emission. Is charged.
Then, when the synchronizing contact 16 is short-circuited with the opening operation of the shutter blades, the electric charge charged in the main capacitor 17 is applied to the discharge tube 22, and the discharge tube 22 emits light.

FIG. 3 shows a lens-fitted film unit 30 having a strobe device 10. The unit main body 31 is mainly made of plastic, and the whole body 3
Covered by two. The exterior body 32 is for cleaning the appearance of the lens-fitted film unit.
A paper box or the like whose surface is printed is used. Exterior body 32
Is provided with a photographing lens 33, a finder 34, a shutter button 35, a winding knob 36, a counter window 37, and an opening for exposing the light emitting unit 12 to the outside. You can shoot while wearing the cover.

The unit main body 31, as shown in exploded view in FIG. 4, has a main body 41, a front cover 42 which covers the front surface of the main body 41, and a rear cover 43 which covers the rear surface of the main body 41. It consists of and. Body part 41
An exposure unit 44 in which a taking lens 33 and a shutter mechanism are assembled is mounted on the front surface of the, and the strobe device 10 is mounted on the upper side, and is sandwiched between a front cover 42 and a rear cover 43. The front cover 42 and the rear cover 43 include the main condenser 1 provided in the strobe device 10.
This main capacitor 1 is curved according to the outer peripheral shape of 7.
Support piece 4 for sandwiching and fixing both ends of 7 from the front and back
5 and 46a, 46b are provided. Further, notches 43a and 42a for exposing the upper portion of the light emitting unit 12 are formed at the upper edge portion of the rear cover 43 and the position extending from the upper wall surface of the front cover 42 to the front surface portion.
In the strobe device 10, the storage position (see FIG. 2A) in which the light emitting unit 12 is stored in the unit main body 31 and the front portion of the light emitting unit 12 are located in the unit main body 3.
1 is housed in the unit main body 31 so as to be rotatable between the photographing position (see FIG. 2B) that is projected upward.

In the process of manufacturing the strobe device 10, first, the board portion 11 and the light emitting unit 12 are separately assembled. Then, the opening 21a of the light emitting unit 12 is formed.
The main capacitor 17 is inserted into the main capacitor 17, and then the terminals 17a and 17b of the main capacitor 17 are soldered to the printed circuit board 13. As a result, the board unit 11 and the light emitting unit 12 are integrated and the strobe device 10 is configured as a single member, so that the strobe device 10 can be easily handled and managed.

The assembled strobe device 10 is transferred to the process of assembling the lens-fitted photo film unit 30, and is incorporated in the unit main body 31. First, the exposure unit 44 and the flash device 10 are attached to the front surface of the main body 41. At this time, since the strobe device 10 is configured as a single member, it suffices to attach the strobe device 10 to the body portion 41, and the strobe device 10 can be easily incorporated into the body portion 41. Then, after the dry battery 14 for power supply is inserted into the battery holder 15, the front cover 42 is attached to the main body 41.
When the rear cover 43 and the rear cover 43 are covered, the support pieces 45 and 46a, 46b provided on the front cover 42 and the rear cover 43 are provided.
The both ends of the main condenser 17 are sandwiched by the front and rear, and the strobe device 10 is fixed in the unit main body 31. Further, since the side surface of the light emitting unit 12 abuts on the inner wall of the unit body 31, it is difficult to apply a force in the direction in which the two terminals 17a and 17b of the main capacitor 17 are bent, and the rotation axis of the light emitting unit 12 is stabilized. The light emitting unit 12 of the strobe device 10 is shown in FIG.
It is directed to the storage position shown in.

When purchasing the lens-fitted film unit 30 with a built-in strobe device and taking a picture, the photographer first rotates the winding knob 36 until the rotation is locked, and charges the shutter. Prepare for shooting.

At the time of stroboscopic photography, a finger is put on the groove 25 of the light emitting unit 12 exposed on the upper wall surface of the lens-fitted film unit 30, and the rear edge is pressed downward. As a result, the light emitting unit 12 rotates, the front portion thereof projects above the unit main body 31, and as shown in FIG. 2B, the optical axis 22a of the strobe light emitted from the discharge tube 22 is changed. The unit main body 31 is moved to a position almost on the upper wall surface. At this time, the light emitting unit 12 rotates about the main condenser 17 having a large diameter, and both ends of the main condenser 17 are supported by the support pieces 45 and 4.
Since it is fixed in the unit main body 31 by 6a and 46b, the rotation of the light emitting unit 12 can be stably performed with a small force. Then, the light emitting unit 12
When is moved to a shooting position protruding from the unit main body 31, the pressing of the contact piece 18b by the housing 21 is released, the charging switch 18 is turned on, and the main capacitor 17 is charged.

When the photographer frames the subject at an appropriate position and presses the shutter button 35, the shutter blades are opened and closed, and the synchro contact 16 is short-circuited with the opening operation of the shutter blades. As a result, the electric charge charged in the main capacitor 17 is applied to the discharge tube 22, the discharge tube 22 emits light, and strobe light is emitted toward the subject. At this time, since the optical axis 22a of the strobe light is moved above the unit main body 31 and is located away from the optical axis of the subject light incident on the taking lens 33, the occurrence of the red-eye phenomenon is prevented and a good subject image is obtained. Can be obtained.

Since the charging switch 18 remains in the ON state even after the stroboscopic photography is completed, the main capacitor 17 discharged by the stroboscopic photography is charged again. Therefore, without performing a special charging operation,
By simply rotating the winding knob 36 to charge the shutter and then pressing the shutter button 35, the flash photography can be continued.

When the flash photographing is completed and the upper surface of the protruding light emitting unit 12 is pressed to move to the storage position shown in FIG. 2A, the bottom wall of the light emitting unit 12 moves down the contact piece 18b. Press to the side. As a result, the contact between the contact piece 18a and the contact piece 18b is released, and the charging switch 18 is turned off.
Since the FF state is set, the charging of the main capacitor 17 is stopped. Further, since the diffuser plate 24 attached to the front surface of the light emitting unit 12 moves to the position retracted into the unit body 31, the lens-fitted film unit 3 is provided.
It is possible to prevent the diffuser plate 34 from being damaged while carrying 0.

[0021]

As described above, according to the present invention, the light emitting unit is constructed by integrating the discharge tube, the reflector and the diffuser plate, and this light emitting unit is used as the main capacitor provided on the printed circuit board. Since the strobe device is attached to form the strobe device, the strobe device serves as a single member, which facilitates handling and installation in the camera. Also, since the light emitting unit is provided so as to be freely movable between the storage position stored in the unit body and the shooting position pulled out from the unit body, the optical axis of the strobe light should be separated from the optical axis of the subject light. It is possible to prevent the occurrence of the red eye phenomenon. Moreover, since the light emitting unit is directly attached to the cylindrical main capacitor and rotates about this main capacitor, there is no need to use a special moving member, and the strobe device can be made compact and low cost. . Further, since the opening for exposing the upper part of the light emitting unit is formed in the unit main body, and the upper wall of the light emitting unit also serves as the upper wall of the unit main body, a wide moving range of the light emitting unit can be secured. It is possible to prevent the size of the lens-equipped film unit as a whole due to the overlapping of the upper walls.

Further, since the switch for activating the charging circuit when the light emitting unit is in the photographing position and stopping the charging circuit when the light emitting unit is in the storage position is provided, once the light emitting unit is moved to the photographing position. The main capacitor is automatically charged unless it is returned to the storage position, which simplifies the charging operation.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a flash device of the present invention.

2A and 2B are explanatory views showing a rotating state of the light emitting unit shown in FIG. 1, in which FIG. 2A shows a storage position and FIG. 2B shows a shooting position.

FIG. 3 is an external view of a lens-fitted film unit including the strobe device shown in FIG.

FIG. 4 is an exploded perspective view of the unit main body shown in FIG.

[Explanation of symbols]

 10 Strobe Device 11 Board Part 12 Light Emitting Unit 14 Dry Battery 17 Main Capacitor 18 Charging Switch 21a Opening 22 Discharge Tube 23 Reflective Umbrella 24 Diffuser Plate 30 Film Unit with Lens 31 Unit Body 42a, 43a Notch

Claims (3)

[Claims] 1. A substrate portion on which a strobe circuit for controlling charging and discharging of a main capacitor is mounted, a discharge tube for emitting strobe light, and light emitted from this discharge tube is focused forward. A strobe device comprising a reflector and a light emitting unit integrally provided with a diffuser plate for diffusing light emitted toward the front, and the light emitting unit is rotatably attached to the main capacitor. . 2. A lens-fitted film unit having a strobe device for causing a discharge tube to emit light by an electric charge stored in a main capacitor, in which a film is incorporated in advance in a unit main body having a photographing mechanism. The light emitting unit is configured by integrally providing a reflector that condenses the light emitted from the front toward the front and a diffusion plate that diffuses the light emitted toward the front, and the light emitting unit is configured by the unit main body. It is attached to the main capacitor so that it can be rotated between the storage position that is stored inside and the shooting position that projects from the unit body, and the charging circuit is activated when the light emitting unit is in the shooting position. Charge the main capacitor,
A film unit with a lens, which is provided with a switch for stopping the operation of the charging circuit when the light emitting unit is in the storage position. 3. An opening for exposing a part of the light emitting unit is formed in an outer wall of the unit body, and the outer wall of the light emitting unit exposed through the opening also serves as the outer wall of the unit main body. The film unit with lens according to claim 2.