JPH0887057A - Stroboscopic unit and film unit with lens incorporating the same - Google Patents

Abstract

PURPOSE: To miniaturize a film unit with a lens. CONSTITUTION: Parts for a stroboscope except a main capacitor 12 are attached to the upper part of a printed circuit board 11, and the main capacitor 12 is attached to the lower part of the printed circuit board 11 in a state where its longitudinal direction is vertical. By forming an aperture 25a at the upper part of a film roll chamber 25 and inserting the main capacitor 12 in the aperture 25a so that the printed circuit board 11 may be attached to the upper part of the film roll chamber 25, the main capacitor 12 is arranged in the winding core space of a film roll 36a in the film roll chamber 25. By shielding light in a gap between the aperture of the film roll chamber 25 and the main capacitor 12 with a cylindrical light shielding case, a stroboscopic unit 10 is made to freely move up and down and the film unit with a lens with a pop-up type stroboscope is produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strobe unit which contributes to downsizing of a lens-fitted film unit and a lens-fitted film unit incorporating the strobe unit.

[0002]

2. Description of the Related Art A lens-fitted photo film unit having a photo film preliminarily loaded in a unit body equipped with a simple photo-taking mechanism is commercially available so that anyone can easily take a photo. Such a lens-fitted film unit having various functions is commercially available, for example, there is a strobe device such as "Shooting Flash" (trade name).

Since such a lens-fitted photo film unit is sold at a price close to that of a general photographic film, for example, a strobe device mounted on the photo film has an extremely simple structure. That is, on one printed circuit board, output transistor, transformer, main capacitor, rectifier,
In addition to a group of components such as a strobe light emitting section and a charge indicator lamp, a general strobe device is also equipped with an electrode contact piece for a power supply battery that is assembled to another member to be assembled, so that the entire strobe device is unitized. .

The printed circuit board of this strobe device is arranged between a film roll chamber in which unexposed photographic film is stored in a roll and a dark box portion. As a result, the strobe light emitting unit, the charge indicator lamp and the main capacitor are arranged above the film roll chamber, and the electrode contact for the power battery is arranged below the dark box.

[0005]

By the way, recently,
There is a strong demand for further miniaturization of the above-mentioned lens-fitted film unit so that it can be easily inserted into a chest pocket or the like. However, in the strobe device as described above, since the printed circuit board is arranged between the film roll chamber and the dark box part, it is difficult to reduce the lateral size of the lens-fitted film unit.

It is an object of the present invention to provide a strobe unit which contributes to downsizing of a lens-fitted film unit and a lens-fitted film unit incorporating the strobe unit.

[0007]

In order to achieve the above object, a strobe unit according to a first aspect of the present invention mounts strobe parts such as a strobe light emitting portion, a main capacitor, and a contact for a power supply battery on a printed circuit board in advance. In a strobe unit built in a lens-fitted film unit provided with a film roll chamber for storing unexposed photographic film in a roll form, a main capacitor is arranged on one surface of the printed circuit board so that its longitudinal direction is vertical. The main condenser is inserted into the film roll chamber through an opening formed in the upper portion of the film roll chamber, and is placed in the core space of the roll-shaped photographic film housed in the film roll chamber.

A lens-fitted photo film unit according to a second aspect of the present invention is provided for a strobe light emitting section, a main capacitor, and a power supply battery on a printed circuit board in a unit main body provided with a film roll chamber for storing unexposed photographic film in a roll shape in advance. In a film unit with a lens to which a strobe unit mounted with strobe parts such as contact pieces is attached,
An opening having a size corresponding to the outer diameter of the main capacitor is formed in the upper portion of the film roll chamber, and the strobe unit is mounted on one surface of the printed board so that the longitudinal direction of the main capacitor is vertical, The main condenser is inserted into the film roll chamber through the opening and is arranged in the core space of the roll-shaped photographic film housed in the film roll chamber.

The lens-fitted photo film unit according to claim 3 is for a strobe light emitting section, a main capacitor, and a power supply battery on a printed circuit board in a unit main body provided with a film roll chamber for storing unexposed photographic film in a roll shape in advance. In a film unit with a lens to which a strobe unit mounted with strobe parts such as contact pieces is attached,
An opening having a size corresponding to the outer diameter of the main capacitor is formed in the upper portion of the film roll chamber, and the strobe unit is attached such that the main capacitor is vertical to one surface of the printed circuit board. Another strobe component is attached to the other surface of the printed circuit board, and by attaching this printed circuit board to the upper part of the film roll chamber, the main capacitor is inserted into the film roll chamber through the opening, and the roll Is arranged in the core space of the photographic film, and a light-shielding member is arranged in the gap between the edge of the opening and the main capacitor inserted in the opening to prevent light from leaking into the film roll chamber. It is a thing.

A lens-fitted film unit according to a fourth aspect is the lens-fitted film unit according to the third aspect, wherein the light-shielding member is disposed between the printed circuit board and the film roll chamber, and an edge of an opening of the film roll chamber. This is a ring-shaped member having a ridge portion that enters a gap between the portion and the main capacitor.

A lens-fitted film unit according to a fifth aspect of the present invention is the lens-fitted film unit according to the third aspect, wherein the light-shielding member covers all of the portion of the main condenser inserted into the film roll chamber, and the edge portion thereof. Is a tubular light-shielding case joined to the edge of the opening of the film roll chamber.

[0012]

In the strobe unit, the main capacitor is attached to one surface of the printed circuit board so that the longitudinal direction is vertical. An opening of a size corresponding to the outer diameter of the main capacitor is formed in the upper part of the film roll chamber of the film unit with lens, and the main capacitor is inserted from here to the printed circuit board on the upper part of the film roll chamber. , The main capacitor is placed in the core space of the film roll. That is, the main capacitor having the largest size among the strobe components fits within the outline of the unit body, so that the lens-fitted film unit can be downsized accordingly.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 2 and 3, a strobe unit 1
On top of the 0 printed circuit board 11, the main capacitor 1
Strobe parts other than 2, for example, strobe light emitting section 15,
Trigger capacitor 16, output transistor 17, rectifier 18, output transformer 19, trigger transformer 2
0, charging indicator lamp 21 and electrode contact piece 2 for power battery
2 and 23 are mounted. These are inserted into the holes of the printed circuit board 11 by a machine and temporarily fixed, and then collectively soldered in a solder bath, which can contribute to a reduction in assembly time. The stroboscopic light emitting unit 15 includes a discharge tube 15a, a reflector 15b having the discharge tube 15a inserted in the center thereof, and a plastic frame 1 for holding them.
5c and a protector 15d attached to the cover 5c and covering the front part of the reflector 15b.

The main capacitor 12 is soldered to the lower part of the printed circuit board 11. At the time of this soldering, a light shielding ring 24 made of light shielding plastic is inserted between the printed circuit board 11 and the main capacitor 12, and the longitudinal direction of the main capacitor 12 is the printed circuit board 1.
Solder so that it is perpendicular to the surface of 1. The light-shielding ring 24 is a light-shielding member that prevents light from leaking into the film roll chamber 25 from the gap between the main condenser 12 and the edge of the opening 25a of the film roll chamber 25, which will be described later.

The electrode contact pieces 22 and 23 have a size smaller than that of an AA dry battery conventionally used as a power supply battery, that is, an AAA dry battery 2
Load 6. When the AAA dry cell 26 is loaded on the electrode contact pieces 22 and 23, the strobe unit 10 can independently perform a functional test such as light emission. Further, as shown in FIG. 1, an L-shaped plastic plate 27 is fixed to the lower portion of the printed circuit board 11, and the charging switch 2 is provided at each end.
8 and the synchronizing contact piece 29 are arranged. Note that FIG.
3 and FIG. 3, in order to avoid complication of the drawing, the plastic plate 27, the charging switch 28, and the synchronizing contact piece 29 are shown.
Are not shown.

In FIG. 1, the main body 30 of the lens-fitted photo film unit is, in addition to the film roll chamber 25,
The photo film cartridge 31 includes a cartridge chamber 33 in which the cartridge main body 32 is loaded, and a dark box portion 34 provided between the film roll chamber 25 and the cartridge chamber 33. The film roll chamber 25 accommodates a film roll 36a in which an unexposed photographic film 36 pulled out from the cartridge body 32 is wound into a roll.
At the top of the film roll chamber 25, the main condenser 1
A hole 25a for receiving 2 is formed. This hole 25
A ridge 25b is formed around a.

When the main condenser 12 is inserted into the film roll chamber 25 through the hole 25a and the printed circuit board 11 of the strobe unit 10 is attached to the upper portion of the film roll chamber 25 by, for example, claw engagement, as shown in FIG.
The light-shielding ring 24 fits in the protrusion 25b. Then, the protrusion 24a formed on the lower surface of the light shielding ring 24 is
It is fitted in a gap between the main condenser 12 and the edge of the hole 25a, and light leakage from the gap into the film roll chamber 25 is prevented.

An exposure unit 40 is provided at the front of the dark box 34.
Are attached by claw engagement. This exposure unit 4
At 0, a taking lens 41, a shutter mechanism 42, and a counter mechanism 43 are integrated. A front cover 47 is attached by claw engagement to the front portion of the main body portion 30 to which the exposure unit 40 is attached. At the front portion of the front cover 47, a strobe opening 47a corresponding to the protector 15d, a charging switch pressing portion 47b pressed when the charging switch 28 is operated, a photographing lens opening 47c, and a viewfinder window 47d. Etc. are formed. Further, on the upper portion of the front cover 47, an opening 47e for the charge indicating lamp 21, a shutter button 47f, a counter window 47g.
Etc. are formed. Also, on the back surface of the main body 30,
After the photo film 36 is loaded into the main body 30, the rear cover 50 is attached by the claw engagement, and the film roll chamber 25, the cartridge chamber 33, and the dark box 34 are light-tightly closed.

The operation of the strobe unit and the lens-fitted film unit thus configured will be described. The strobe unit 10 is manufactured in a different line from the lens-fitted film unit. First, all the strobe components except the main capacitor 12 are automatically temporarily fixed to the upper portion of the printed circuit board 11 and are collectively soldered in a solder bath. After this,
After soldering the main capacitor 12 to the lower portion of the printed circuit board 11, the charging switch 28 and the synchronizing contact piece 2
9 is attached to the plastic plate 27 and the printed circuit board 11
Fixed at the bottom of the. The charging switch 28 and the synchro contact piece 29 are connected to the printed wirings of the printed circuit board 11 via lead wires provided along the back surface of the plastic plate 29.

A functional battery test of the strobe unit 10 is carried out by mounting the AAA dry battery 26 on the electrode contact pieces 22 and 23. At this time, the test is performed by using the AAA batteries 26 that are actually used, without using the power source dedicated to the test.
It is possible to perform a test of the entire strobe unit 10 in accordance with an actual usage condition also as a test of the dry battery 26.

After the strobe unit 10 is set in the test device, the charging switch 28 is turned on. After a predetermined time has elapsed and the electric charge necessary for light emission is accumulated in the main capacitor 12, the synchronizing contact piece 29 is short-circuited. A light quantity measuring device is installed in front of the strobe light emitting section 15 at a predetermined distance, and the light quantity emitted from the strobe light emitting section 15 is measured by this. This is repeated several times, and if the amount of each emitted light is equal to or higher than a predetermined level and there is no abnormality in the time required for charging, the light emitting operation, or the like, it is determined that the function of the strobe unit 10 is normal, and the production line of the lens-fitted film unit. Bring to. Since this test may be performed by turning ON / OFF the charging switch 28, short-circuiting the synchronizing contact piece 29, reading the amount of emitted light, measuring the charging time, etc., it can be easily automated.

In the production line of the film unit with lens, after the exposure unit 40 is attached to the main body 30,
After the cartridge main body 32 and the film roll 36a are housed in the film roll chamber 25 in the cartridge chamber 33 in the dark room, the rear cover 50 is attached to the main body unit 30, and the film roll chamber 25, the cartridge main body 32 and the dark box unit 34 are attached. Close light tightly.

Subsequently, the strobe unit 10 is attached to the upper portion of the film roll chamber 25 in the dark room. At this time,
The main condenser 12 is inserted into the film roll chamber 25 through the opening 25 and arranged in the winding core space of the film roll 36a, and the light shielding ring 24 is fitted inside the protrusion 25a and the protrusion of the light shielding ring 24 is also formed. 24a enters the gap between the main condenser 12 and the edge of the opening 25, and light leakage from the gap into the film roll chamber 25 is prevented. Then, the front cover 47 is attached to the main body 30 to complete the lens-fitted film unit.

In FIG. 4, in this embodiment, the edge portion of the opening 25a of the film roll chamber 25 and the main condenser 12 are shown.
As the light blocking member for blocking the gap between the
Instead of 4, a light shielding case 55 having a cylindrical shape is used. The light shielding case 55 is inserted into the film roll chamber 25 through the opening 25a and welds the edge portion. The main capacitor 12 is removably inserted into the light shielding case 55. As a result, the entire strobe unit 10 can be easily moved up and down with respect to the main body portion 30, so that the strobe unit 10 can be popped up at the time of strobe photography to create a film unit with a lens that reduces the red-eye effect. It will be possible.

In the embodiment described above, not only is the main capacitor placed in the winding core space of the film roll, but the size of the printed circuit board is reduced so that it can be placed on the upper part of the film roll chamber, and the single capacitor is placed on top of this. Since the dry battery is arranged, the strobe unit can greatly contribute to the miniaturization of the lens-fitted film unit.
Further, since this strobe unit is compactly assembled, a larger number of trays can be mounted on the tray for transportation, which contributes to reduction of transportation cost. Although a light-shielding ring is used as a member that shields the gap between the main condenser and the opening of the film roll chamber, this shape is not limited to a ring shape and may be, for example, a rectangular shape together with the opening shape of the film roll chamber. . Further, although the cylindrical case is adopted as the light shielding case, the present invention is not limited to this, and may be, for example, a polygonal cylindrical shape.

[0026]

As described above in detail, according to the present invention, since the main condenser is arranged in the core space of the film roll in the film roll chamber, the lens-fitted film unit can be made compact by the mounting space of the main condenser. Can be converted. Further, if a ring-shaped member having a ridge portion that enters the gap is used as a member that shields the gap between the main condenser and the opening of the film roll chamber,
Light leakage into the film roll room can be prevented easily and reliably. Further, as the light blocking member, a cylindrical light blocking case is used,
By joining this to the edge of the opening of the film roll chamber, the main capacitor can be freely moved up and down in the light shielding case. Therefore, for example, it becomes possible to make a film unit with a lens that pops up the strobe unit at the time of stroboscopic photography to reduce the red-eye effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a lens-fitted film unit embodying the present invention.

FIG. 2 is a partial cross-sectional view showing a main condenser, a strobe unit, and a light-shielding ring arranged inside a film roll chamber.

FIG. 3 is a schematic plan view of the strobe unit as seen from above.

FIG. 4 is an explanatory diagram showing a light shielding case.

[Explanation of symbols]

 10 Strobe Unit 11 Printed Circuit Board 12 Main Capacitor 15 Strobe Light Emitting Section 22, 23 Electrode Contact Piece 24 Light-Shielding Ring 25 Film Roll Chamber 25a Opening 26 AAA Battery 30 Main Body 36a Film Roll 55 Light-shielding Case

Claims (5)

[Claims] 1. A lens-equipped film provided with a strobe light emitting section, a main condenser, a contact piece for a power battery, and other strobe parts on a printed circuit board, and a film roll chamber for accommodating an unexposed photographic film in a roll shape in advance. In a strobe unit built in the unit, a main capacitor is attached to one surface of the printed circuit board so that its longitudinal direction is vertical, and the main capacitor is provided through an opening formed in the upper part of the film roll chamber. A strobe unit which is inserted into a roll chamber and arranged in a core space of a roll-shaped photographic film housed in the film roll chamber. 2. A stroboscopic light emitting part, a main capacitor, a strobe for a power supply battery, and other strobe parts are mounted on a printed circuit board in a unit body provided with a film roll chamber for storing unexposed photographic film in a roll shape. In the film unit with a lens to which the strobe unit is attached, an opening having a size corresponding to the outer diameter of the main capacitor is formed in the upper part of the film roll chamber, and the strobe unit has the main capacitor on one surface of the printed circuit board. And the main condenser is inserted into the film roll chamber through the opening and is arranged in the core space of the roll-shaped photo film housed in the film roll chamber. A film unit with a lens that is characterized by. 3. A stroboscopic light emitting part, a main capacitor, a strobe for a power supply battery, and other strobe parts are mounted on a printed circuit board on a unit body provided with a film roll chamber for storing unexposed photographic film in a roll form. In the film unit with a lens to which the strobe unit is attached, an opening having a size corresponding to the outer diameter of the main condenser is formed in the upper part of the film roll chamber, and the strobe unit is configured such that the main condenser has one surface of the printed circuit board. Is mounted so that its longitudinal direction is vertical, and other strobe components are mounted on the other surface of the printed circuit board.By mounting this printed circuit board on the upper part of the film roll chamber, the main capacitor is Photograph of the roll shape inserted into the film roll chamber through the opening It is arranged in the core space of the film, and a light-shielding member is arranged in the gap between the edge of the opening and the main capacitor inserted in the opening to prevent light from leaking into the film roll chamber from this gap. A film unit with a lens. 4. The light-shielding member is a ring-shaped member that is arranged between the printed circuit board and the film roll chamber and has a ridge portion that enters a gap between the edge of the opening of the film roll chamber and the main capacitor. The film unit with lens according to claim 3. 5. The light-shielding member is a cylindrical light-shielding case that covers the entire portion of the main capacitor inserted into the film roll chamber and has its edge joined to the edge of the opening of the film roll chamber. 4. The method according to claim 3, wherein
Film unit with the described lens.