JP2618259B2 - camera - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a camera provided with a manual generator as a power source for strobe light emission.

(Prior art) In a relatively simple camera, shutter charging and film feeding are performed using mechanical energy manually, but only strobe light emission has to use electric energy. Is usually used.

This type of camera cannot be used for flash photography when the battery is exhausted, and the battery must be replaced each time, which is very troublesome. Also, depending on the shooting location (mountain), the battery may not be easily available, and eventually the shooting may not be possible due to the lack of the battery.

(Objects and Configurations of the Invention) The present invention has been made in view of the above points, and has as its object to be able to supply power for strobe light emission without a battery, and therefore to supply power to a strobe light emission circuit. The camera was provided with a storage battery and a manual generator for generating an electromotive force by rotating an annular rotating member arranged around the lens barrel around the lens barrel and charging the storage battery.

(Example) Hereinafter, the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of a camera according to the present invention, wherein (a) is a perspective view of the camera, and (b) is an exploded view of a manual generator incorporated in the camera.

In FIG. 1 (a), reference numeral 1 denotes a release button, 2 denotes a photographing lens attached to a lens barrel 3, 4 denotes a strobe light emission window which also serves as a finder, and 5 denotes a handle for activating a manual generator. In FIG. 1B, reference numeral 6 denotes an annular rotary plate having a gear formed on the outer periphery, and the handle 5 is connected to the rotary plate 6 by a hinge. When the handle 5 is not used, it is laid down as shown in FIG. 1 (a), and when it is used, it is erected as shown in FIG. 1 (b). The rotary plate 6 meshes with gears 7, 8, 9 on its outer periphery, and the gears 7, 8, 9
It is pivoted on. The teeth of gears 7, 8, 9 are formed in a convex shape,
On the other hand, the gear of the rotating plate 6 is formed in a concave shape so that the rotating plate 6 does not come off. The gear 9 is the first stage of the speed increasing gear train 11.

Reference numeral 12 denotes an annular rotating magnet plate having a gear formed on the inner periphery, and the rotating magnet plate 12 has a thickness of 1 mm or less, in which a plurality of small disc-shaped permanent magnets 13 are arranged at regular intervals and It is buried so that the direction of the magnetic flux is the same. Rotating magnet plate 12
Is the last stage 1 of the gears 14 and 15 and the speed increasing gear train 11 on the inner circumference.
6 is in mesh.

Reference numeral 17 denotes a flat coil having a coil pattern formed on a surface facing the small permanent magnet 13. The flat coil 17 is of the same type as that used for a known flat coil motor, and has a thickness of 1 mm or less. Flat coil 17 is shutter base plate 1
The electromotive force generated in the coil, which is attached to 0, is taken out by the connection 18.

The rotating plate 6, the rotating magnet plate 12, and the flat coil 17 are mounted so as to be positioned around the lens barrel, and are each configured to be thin, so that the manual generator can be attached to the camera while keeping the entire camera compact. Can be attached. .

In the embodiment shown in FIG. 1, the rotating plate 6 and the rotating magnet plate 12 are supported by the gears 7, 8, 9 and the gears 14, 15, but the lens barrel 3 is connected to the spindle of the rotating plate 6 and the rotating magnet plate 12. If used, the number of parts can be reduced and the device can be made more compact.

FIG. 2 is a circuit diagram of a strobe light emitting circuit. A connection 18 from a manual generator 20 is connected to a storage battery 21 via a backflow prevention diode 19. Reference numeral 22 denotes a flash switch for starting flash charging, and reference numeral 23 denotes a booster circuit that boosts the voltage of the storage battery 21. In this booster circuit 23, the transistor _Tr
The DC current is converted into an alternating current, and the voltage is boosted by the transistor T and then rectified by the diode D. When the strobe switch 22 is turned on, the main capacitor 24 is charged by the high-voltage direct current from the booster circuit 23. When the main capacitor 24 reaches a specified voltage, the neo lamp 25 is turned on to indicate that the charging is completed. At this time, the trigger capacitor 26 is similarly charged. When the shutter of the camera is released, the synchro contact 27 closes, the electric charge charged in the trigger capacitor 26 flows to the trigger coil 28, and the high voltage generated in the secondary winding of the trigger coil 28 is applied to the trigger electrode 29. The discharge tube 30 emits light.

 Next, the operation of the embodiment will be invented.

First, when the user raises the handle 5 and rotates the rotating plate 6, the rotating force is increased by the speed increasing gear train 11 and the rotating magnet plate
The rotating magnet plate 12 rotates at high speed. An electromotive force is generated in the flat coil 17 due to a change in magnetic flux caused by this rotation, and the storage battery 21 is charged via the connection 18.

When the strobe switch 22 is turned on, the strobe light emitting circuit operates as described above.

The user can operate the manual generator 20 as needed to obtain power, and there is no possibility that flash photography cannot be performed due to running out of battery as in the related art. Therefore, it is possible to realize a full manual camera without batteries, that is, completely maintenance-free.

In the above embodiment, the manual generator is attached around the lens barrel of the camera. However, the present invention is not limited to this, and the manual generator may be provided by using another space of the camera. Also, another type of generator may be used.
However, if a manual generator using a flat coil is provided around the lens barrel as in the embodiment, a large electromotive force can be easily obtained, and the lens barrel that protrudes most normally on the front of the camera can be effectively used. The members for driving the manual generator can be efficiently arranged in the camera by utilizing the camera, and the camera having the generator can be made smaller.In addition, since the camera has the generator and the storage battery charged by the generator, the strobe can be used. It is possible to use the continuous photographing, so that a fatal problem in a camera that misses a shutter chance can be solved, and the connection with a strobe circuit can be easily performed.

In the present invention, the electric power generated by the manual generator is stored in the storage battery.However, as a method for realizing a full manual camera, mechanical means such as rotating a manual generator and applying mechanical energy to a spring is used. It may be stored and used to release this mechanical energy each time a strobe is fired, and a manual generator may be rotated to obtain electrical energy.

(Effects of the Invention) As described above, according to the present invention, by rotating a storage battery for supplying power to a strobe light emitting circuit and an annular rotating member arranged to surround a lens barrel around the lens barrel, Since the camera includes a manual generator that generates an electromotive force and charges the storage battery, an electromotive force can be generated by rotating an annular rotating member disposed so as to surround the lens barrel. A member for driving the manual generator can be efficiently disposed on the camera by effectively utilizing the lens barrel that protrudes most on the front surface, and the camera having the generator can be made smaller, and the generator and the Since it has a storage battery that is charged by the camera, continuous shooting using a strobe is possible,
In a camera that misses a photo opportunity, a fatal problem can be solved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a) is a perspective view of an embodiment of a camera according to the present invention, (b) is an exploded view of a manual generator, and FIG. 2 is a circuit diagram of a strobe light emitting circuit. 5 ... handle, 6 ... rotating plate, 12 ... rotating magnet plate, 13
…… Small permanent magnet, 17… Flat coil, 21 …… Storage battery,
23 …… Booster circuit, 30 …… Discharge tube

Claims (1)

(57) [Claims] 1. A storage battery for supplying power to a strobe light emitting circuit, and an annular rotating member arranged so as to surround a lens barrel is rotated around the lens barrel to generate an electromotive force to charge the storage battery. A camera comprising: a manual generator;