JPH06175200A - Film unit with lens with built-in stroboscope - Google Patents

Abstract

PURPOSE:To make a strobe flushing unit thinner by reducing a limit due to the length of a neon tube in the longitudinal direction at the time of making the strobe flashing unit for a film with lens with built-in stroboscope thin in structure. CONSTITUTION:The neon tube 2 is attached with a stroboscope board 15 so as to set at the angle of <=60 deg. to the stroboscope board 15. And also, a reflection body 25 is installed between the neon tube 2 and an opening part 24 installed on the eyepiece side of a finder 13, and then, the flickering of the neon tube 2 can be recognized from the opening part 24 through the reflection body 25.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A film unit with a lens is sold in a state in which a film is loaded in advance in a unit body in which a photographing mechanism such as a photographing lens and a shutter is incorporated, and it is easy to take a picture by just purchasing this. Widely used from. The film unit with a lens with a built-in strobe has a strobe device-dry battery built in the above-mentioned unit body, and stroboscopic photography can be easily performed only by operating the charging switch for the strobe.

In such a film unit with a built-in strobe lens, a neon tube for indicating that the strobe main capacitor has been charged to a prescribed level is incorporated. And this neon tube needs a certain length to guarantee performance. In addition, among the components that make up the strobe device, the main capacitor requires a considerable amount of space for installation. Moreover, in the past, the circuit board was installed along the front surface of the lens-fitted photo film unit, and the main capacitor was arranged vertically along the circuit board.Therefore, the neon tube is a strobe device that avoids this main capacitor. It was attached so as to project vertically to the circuit board.

[0004]

However, when the neon tube is vertically attached to the circuit board, the tip of the neon tube projects from the circuit board because the length of the neon tube is larger than the outer diameter of the main capacitor. Will end up. Therefore, the thickness of the entire strobe device cannot be made equal to or less than the length of the neon tube, and as a result, the lens-fitted film unit cannot be made thin. Moreover, since the neon tube projects from the circuit board, the neon tube may be a hindrance or break when assembled.

Further, an opening is provided in the lens-fitted film unit for confirming the lighting of the neon tube. When this is provided on the upper surface of the lens-fitted film unit,
In order to confirm the lighting of the neon tube, the eye must be taken away from the viewfinder eyepiece, which is a problem in terms of operability. Also,
When providing the opening near the viewfinder eyepiece,
It is necessary to lengthen the lead wire and further project the neon tube from the circuit board, which makes it impossible to make the strobe device thin and improve the suitability for installation.

The present invention has been made in consideration of the above problems of the prior art. The length of the neon tube in the long side direction becomes an obstacle when the thickness of the strobe light emitting unit of the film with a lens with a built-in strobe is reduced. It is possible to reduce the restriction due to the size and to make the strobe light emitting unit thinner, and thus to make the film unit with a lens with a built-in strobe lighter and smaller.

[0007]

In order to achieve the above object, the neon tube of the film unit with a lens with a built-in strobe has an angle of 60 ° or less between the long side direction of the strobe discharge tube and the long side direction of the neon tube. Or, it is attached so that the long side direction of the strobe discharge tube and the long side direction of the neon tube are parallel to each other, and an opening is provided around the viewfinder eyepiece, and the neon tube and the opening are In the meantime, the light when the neon tube is turned on is reflected inside the film unit with a lens with a built-in strobe so that the light reaches the opening.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings by dividing the structure and operation. FIG. 2 is an exploded perspective view of a film unit with a built-in strobe according to the present invention. The film unit is composed of a main body portion 8 and a front cover 9 and a rear cover 10 which are claw-fastened to the front and rear thereof, and accommodates a patrone 11 and a film 12 drawn from the patrone 11 inside. . The front cover 9 is provided with holes for exposing the taking lens 5, the viewfinder 13, the number of shots display plate 6, the stroboscopic light emitting section 3, the winding knob 14, and the like, and is also integrated with the front cover 9. A release button 7 is provided. The main body portion 8 has a patrone chamber 17 and a film chamber 18 formed at both ends thereof. The patrone 11 and the film 12 are accommodated in the main body portion 8, and the main body portion 7 is provided with a strobe board 15 for pawl fixing. The neon tube 2, the strobe light emitting unit 3, the condenser 16 and the like are provided on the strobe substrate 15.

FIG. 1 is an external perspective view of a film unit with a lens with a built-in strobe according to the present invention. The film unit with a lens with a built-in strobe has an opening for exposing a strobe charge button 4, a strobe light emitting section 3, a photographing lens 5, a photographing number display plate 6, and a release button 7 for charging a strobe circuit. Is provided. Further, a reflector 25 is provided between the neon tube 2 and an opening 24 provided on the eyepiece side of the finder 13 of the lens unit with a built-in strobe, and the light when the neon tube 2 is turned on is a reflector. Opening 24 by 25
Therefore, the photographer can confirm whether or not the neon tube 2 is turned on by looking at the opening 24.

FIG. 3 is a schematic perspective view of a strobe substrate of a film unit with a strobe built-in lens embodying the present invention. The strobe substrate 15 is provided with a neon tube 2, a strobe light emitting section 3, a capacitor 16, a coil 20, a transistor 21, a resistor 22, a battery holder 19 for mounting a dry battery, and the like to form a strobe circuit. Then, the angle formed by the long side direction of the neon tube 2 and the long side direction of the strobe light emitting unit 3, which is indicated by the symbol A in the figure, is 6
The neon tube 2 is attached to the strobe substrate 15 so as to be 0 ° or less.

FIG. 4 is a schematic diagram of a strobe circuit. As is well known, the strobe circuit includes a strobe light emitting tube 27, a main condenser 16, a coil 20, a transistor 21,
Also, the battery 23 and the like are incorporated. When the strobe charge switch 4 turns on, the main condenser 16
When the charge is started and the amount of charge stored in the main capacitor 16 becomes constant, the neon tube 2 is turned on. Then, when the trigger switch 26 linked with the release button is turned on, the electric charge of the main capacitor 16 flows into the strobe discharge tube 27 at a time, and flash light is emitted.

Next, the above operation will be described with reference to the drawings. When the photographer shoots with a strobe, the strobe charge switch 4 is first pressed to start charging the main condenser 16. When the amount of electric charge stored in the main condenser 16 becomes constant, the neon tube 2 lights up. At this time, even when the photographer is looking through the viewfinder 13, the film unit with a lens with a built-in flash does not have to be completely removed. The lighting of the neon tube 2 can be confirmed through the reflector 25 simply by shifting the line of sight to the opening 24 provided next to the finder 13.

Further, the neon tube 2 has a strobe substrate so that an angle formed by the long side direction of the neon tube 2 shown by the symbol A in FIG. 3 and the long side direction of the strobe light emitting section 3 is 60 ° or less. Since it is attached to the flash unit 15, the strobe light emitting unit is thinner than the conventional product, so that the film unit with a lens with a built-in strobe is lighter and more compact. Then, when the photographer presses the release button 7, the trigger switch 26 is turned on in conjunction with this, the electric charge of the main condenser 16 flows into the strobe discharge tube 27 at a time, and a flash is emitted at the same time when the shutter is opened and closed, thereby stroboscopic photography. Done.

[0014]

As described above, when the film unit with a built-in strobe lens of the present invention is used, the restriction due to the length of the neon tube in the long side direction when reducing the thickness of the strobe light emitting unit is reduced, The stroboscopic light emitting unit can be made thinner, and thus the film unit with a built-in strobe lens can be made lighter and smaller. Also, even if the photographer is looking through the viewfinder during flash photography, you do not have to completely take your eyes off the film unit with a lens with a built-in flash, simply by shifting your line of sight to the opening provided next to the viewfinder and seeing through the reflector. You can check the lighting of the neon tube.

[Brief description of drawings]

FIG. 1 is an external perspective view of a film unit with a built-in strobe according to the present invention.

FIG. 2 is an exploded perspective view of a film unit with a lens with a built-in strobe according to the present invention.

FIG. 3 is a schematic perspective view of a strobe substrate of a film unit with a strobe-equipped lens embodying the present invention.

FIG. 4 is a schematic diagram of a strobe circuit.

[Explanation of symbols]

 2 Neon tube 3 Strobe light emitting part 16 Main condenser 24 Opening 25 Reflector 27 Strobe light emitting tube

Claims (4)

[Claims] 1. In a film unit with a lens with a built-in strobe, which has a built-in unexposed film in advance, has a photographing mechanism such as a photographing lens and a shutter, and has a strobe device that emits light upon shutter release, charging of a main strobe capacitor. The flash lamp is turned on at the same time as the completion of the charging, and is attached such that the angle formed by the long side direction of the strobe discharge tube and the long side direction of the charge completion indicating lamp is 60 ° or less. Film unit with built-in lens. 2. The strobe according to claim 1, wherein the charging completion indicating lamp is attached such that a long side direction of the strobe discharge tube and a long side direction of the charging completion indicating lamp are parallel to each other. Film unit with built-in lens. 3. An opening is formed around a viewfinder eyepiece of the film unit with a lens with a built-in strobe,
The film unit with a lens with a built-in strobe according to claim 1, wherein the light when the charging completion indicator lamp is turned on is reflected inside the film unit with a lens with a built-in strobe and guided to the opening. 4. The light when the charging completion indicator lamp is turned on is reflected on the back surface of the wall forming a viewfinder optical path between the viewfinder eyepiece opening and the viewfinder objective opening. The film unit with a lens with a built-in strobe according to claim 3.