JP2001290207A - Waterproof stroboscopic device for film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent abnormal sound produced when a stroboscopic device drops into the water. SOLUTION: This stroboscopic device is constituted of a waterproof case consisting of an upper case member 30 and a lower case member 31, and a device main body 33. Holes for exposing a strobe light emitting part 8 and a charge display lamp 36 are formed on the front surface and the left side surface of the waterproof case. A hollow cylindrical part 31b projecting from the lower surface of the member 31 and a hole through which a lead wire is inserted are formed on the member 31. After assembling the main body 33, the member 31 is attached from a lower side so that a main capacitor 45 may be housed in the cylindrical part 31b. Then, the lower part of a printed circuit board 35 is filled with a gel type filler so as to stick the main body 33 to the member 31. Thereafter, the member 30 is attached and ultrasonically welded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flash device, and more particularly, to a flash device used for a film unit with a lens.

[0002]

2. Description of the Related Art A film unit with a lens loaded with a photographic film in advance is widely used because it is easy to handle and inexpensive. There are various types of this film unit with a lens, and there is a film unit equipped with a strobe device so that a photograph can be taken indoors or at night.

In order to sell such a film unit with a lens at a low price, for example, a strobe device mounted thereon has an extremely simple structure. That is,
On a single printed circuit board, in addition to components such as a main capacitor, a strobe light emitting unit, and a charging indicator lamp, in a general strobe device, an electrode piece for a power battery to be assembled to another member to be assembled is mounted. The entire strobe device is unitized. This strobe device is incorporated in a film unit with a lens so that a printed circuit board is located between a film roll chamber and a dark box base, and a main condenser has a longitudinal direction parallel to a film feeding direction, and an upper side of the film roll chamber. Are located in

Further, in this lens-fitted photo film unit, in order to avoid an electric shock due to energization through sea water which has entered when accidentally dropped into sea water, the end of the main condenser of the two cover members which is an exterior body is used. The joints of the parts where the parts are close to each other are formed in an arc shape in accordance with the arrangement position of the main capacitor (Japanese Patent Application Laid-Open No. 9-347439). This arc portion is formed larger than the outer diameter of the end of the main capacitor, and even if the seawater seeps into the film unit due to the capillary phenomenon when falling into the seawater, the aluminum case portion at the end of the main capacitor and the seawater come into contact. Is preventing that.

[0005]

However, in such a film unit with a lens, a high-voltage potential difference is generated between the bottom part of the main condenser and the battery part, and when seawater enters and the inside of the film unit gets wet, No countermeasures have been taken against abnormal noise generated at the moment when the high voltage section and the low voltage section are short-circuited. Also, if the moisture in the air due to the intrusion of the corrosive liquid or the temperature change becomes water droplets and is left attached to the battery and left as it is, the battery may be corroded and liquid leakage may occur. .

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a strobe device in which waterproof measures are taken by itself.

[0007]

In order to achieve the above object, in the strobe device of the present invention, a main capacitor and a display lamp constituting the strobe device are mounted on a circuit board on which a circuit pattern is formed. An insulating body in which a strobe light emitting portion including a discharge tube and a power supply battery are assembled, and an insulating property for watertightly covering the device main body in a state where an input terminal of a synchro signal for strobe light is connected to the circuit board and exposed to the outside. And a waterproof case. Further, it is preferable that the waterproof case includes an upper case and a lower case, and the cylindrical case is integrally formed in the lower case to house the main capacitor or the power battery. Further, it is preferable that the front surfaces of the display lamp and the strobe light emitting portion are exposed in a watertight manner from the joint of the upper case and the lower case.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 2, a lens-fitted film unit 2 of the present invention includes a unit body 3 provided with a photographing mechanism and loaded with a photographic film in advance, and a label 4 partially covering the unit body 3. It is configured. On the front surface of the unit body 3, a photographing lens 5, an object finder 6, a strobe charging switch 7, and a strobe light emitting section 8 are exposed. Further, on the upper surface of the unit body 3, a release button 9 and a remaining number-of-photographs display section 10 are exposed. An eyepiece finder 11 is provided on the rear surface of the unit body 3.
(See FIG. 3), the hoisting knob 12 is exposed.

As shown in FIG. 3, the unit main body 3 comprises a main body base 15, an exposure device 16, a strobe device 17, a front cover 18, and a rear cover 19. In the main body base 15, a cartridge chamber 20 and a film roll chamber 21 are provided.
Are formed. In the case of the present embodiment, the distance between the cartridge chamber 20 and the film roll chamber 21 is smaller than that of a normal lens-fitted film unit. In the cartridge chamber 20 and the film roll chamber 21, a film cartridge 22 and a film roll 23a in which a film 23 pulled out from the film cartridge 22 is rolled at the manufacturing stage are loaded.

A locking plate 24 is formed outside the film roll chamber 21 to lock the front cover 18 and the rear cover 19 to the main body base 15 by nail coupling. The upper wall of the film roll chamber 21 is formed to extend to the locking plate. This extended portion is cut out in a U-shape, and a strobe device 17 described later is attached thereto.

The rear cover 19 is provided with pull-top type bottom covers 19a and 19b for closing the bottoms of the cartridge chamber 20 and the film roll chamber 21, respectively. After the rear cover 17 is attached, the bottoms of the chambers 20 and 21 are closed by the bottom lids 19a and 19b, so that the film cartridge 22 is housed in a light-tight manner between the main body 15 and the main body 15. The bottom lid 19a that covers the bottom of the cartridge chamber 20 is also a lid that is opened when the cartridge 22 containing the photographic film 23 that has been photographed in the developing laboratory is taken out.

A winding knob 12 is provided above the cartridge chamber 20. When the winding operation is performed, knob 1
With the rotation of 2, the unexposed photographic film 23 is pulled out from the film roll 23a, and at the same time, the photographed film portion is stored in the cartridge 22.

The exposure device 16 includes a film counter mechanism,
It is a unit component that incorporates and integrates the exposure functions of the shutter mechanism, the film unwinding mechanism, the photographing lens 5, and the like. By moving the built-in shutter mechanism, the subject is transmitted through the photographing lens 5 to the inside, and is exposed on the film 23.

The strobe device 17 is provided in the film roll chamber 1.
5 attached outside. As shown in FIG. 1, the strobe device 17 includes an upper case member 30 and a lower case member 31.
And a device main body 33.

The upper case member 30 is formed of a resin molded product. On the lower surface of the upper case member, an apparatus main body 33 is provided.
An opening for covering the upper surface of the apparatus main body 33 is formed. A substantially square cutout 30a is formed on the front surface of the upper case member 30 so as to be continuous with the opening.
However, a semicircular notch 30b is formed on the left side surface.

On the upper surface of the printed circuit board 35 of the apparatus main body 33, a strobe light emitting section 8, a charging display lamp 36, a pair of electrode contact pieces 37 for a power supply battery and the like are mounted. These components are temporarily inserted into holes in the printed circuit board 35 by a machine and then soldered together in a solder bath. The strobe light emitting unit 8 includes a discharge tube 40, a reflector 41 into which the discharge tube 40 is inserted, a reflex case 42 for holding these, and a protector 43 for covering the front surface of the reflex case. This protector 4
3 is fixed to the lower case member 31. In addition, the battery section 37 is loaded with a AAA battery as a power supply battery 44.

On the lower surface of the printed board 35, a main capacitor 45 is soldered so that its longitudinal direction is perpendicular to the printed board 35. An input terminal pin 46 for inputting a synchro signal or a strobe charging start signal is soldered to the lower surface. Note that, as shown in FIG.
The 0 and the charge switch 9 are incorporated in the main body base 15 via a printed circuit board 51 outside the flash device 17.
Therefore, the strobe device 17 is connected to the device main body 33 via the input terminal pins 46.

The lower case member 31, like the upper case member 30, is formed of a resin molded product. On the upper surface of the lower case member 31, an opening for accommodating the apparatus main body 33 is formed. In addition, substantially square and semicircular cutouts are respectively formed on the front and side surfaces of the lower case member 31 so as to fit with the cutouts 30a and 30b of the upper case member 30 during assembly. ing. A protector 43 constituting the flash unit 8 is attached to the notch on the front.

A step 31a is provided at the inner bottom surface of the lower case member 31, at the boundary between the side surfaces and at the rear surface. The apparatus main body 33 is held horizontally by placing the end of the printed circuit board 35 on the step 31a. As shown in FIG. 5, a hollow cylindrical portion 31b is formed on the bottom surface of the lower case member 31 so as to protrude downward. The inner diameter of the cylindrical portion 31b is formed in a size corresponding to the outer diameter of the main capacitor 45. Further, a plurality of holes for inserting lead wires are formed on the bottom surface. The inner diameter of the cylindrical portion 31b of the lower case member 31 is formed in accordance with the outer diameter of the power battery 44,
The power supply battery 44 may be disposed here.

The strobe device 17 has a device main body 33 housed therein by ultrasonically welding the upper and lower case members.
Is kept watertight. Also, when the upper and lower case members are assembled,
Substantially square and circular openings are formed on the front and side surfaces, respectively. Then, the strobe light emitting portion 8 is exposed through the protector 43 at the substantially rectangular opening on the front surface, and the charging indicator lamp 36 protrudes from the side surface. Waterproofing of these parts can be ensured by using an O-ring in the case of the charging indicator lamp 36 and an O-ring deformed into a rectangle for the protector 43.

Next, an assembling method according to this embodiment will be described. On the upper surface of the printed circuit board 35, strobe components such as a strobe light emitting portion 8, a charging indicator lamp 36, and an electrode contact 37 for a power battery are soldered, and on the lower surface, a main capacitor 45 and a plurality of input terminal pins 46 are soldered. Assemble 33. After that, the device main body 33 is attached to the lower case member 31. At this time, the input terminal pins 46 attached to the lower surface of the printed circuit board 35 are drawn out of the insertion holes. As shown in FIG. 5, a gel filler 52 is provided between the lower surface of the printed circuit board 35 and the bottom surface of the lower case member 31.
And the apparatus main body 33 is fixed to the lower case member 31. After the battery 44 is attached, the lid is covered with the upper case member 30, and the joint of the upper and lower case members is joined by ultrasonic welding.

The assembled strobe device 17 is assembled to the main body base 15 of the unit main body 3. Figures 3 and 4
As shown in the figure, the strobe device 17 has a cylindrical portion 31e.
To the U-shaped cutout of the main body base 15. Thereafter, the strobe device 17 is fixed by attaching the front cover 18 and the rear cover 19. In addition, a metal contact piece 53 constituting the synchro switch 50 and the charge switch 7
Is attached to the printed circuit board 51. A lead wire from the strobe device 17 is attached to the input terminal pin 46 on the printed circuit board 51, and is attached between the exposure device 16 of the main body base 15 and the film roll chamber 21.

If the flash unit 17 is accidentally dropped into water when the lens-fitted film unit 2 is used, the high-voltage part and the low-voltage part are short-circuited because the strobe device 17 holds the device body 33 watertight by the waterproof case 32. The abnormal noise generated at the moment can be prevented. Further, when the battery fluid leaks from the battery 44, the battery fluid can be stored in the waterproof case 32, so that there is no influence on the outside.

In the above embodiment, the strobe device is incorporated inside the film unit with a lens, but a waterproof case may be used as a part of the camera exterior. Also,
Although the charge switch is formed outside the waterproof case, it may be incorporated in the waterproof case depending on operability and design.

In the above embodiment, the upper and lower case members are joined by ultrasonic welding to keep the inside watertight, but a rubber O-ring or the like may be used. In this case, a concave portion is formed on the entire outer periphery of the opening of the upper and lower case members. A locking claw is formed on one of the upper and lower case members, and a locked piece is formed on the other case member. At the time of assembling, O-rings are fitted into the recesses formed in both cases, and the inside is held watertight by the engagement of the locking claws with the locked pieces.

Further, as a countermeasure for the case where the battery leaks in the waterproof case, a discoloration member such as litmus paper and a display portion thereof may be provided in the waterproof case so as to be externally visible. Alternatively, a cavity for accommodating the liquid may be provided, or a neutralizing agent such as boric acid for neutralizing the electrolytic solution may be sealed inside the waterproof case.

[0027]

As described above, according to the waterproof strobe device for a film unit with a lens of the present invention, the main capacitor and the display lamp constituting the strobe device are mounted on the circuit board on which the circuit pattern is formed. A device main body in which a strobe light emitting unit including a discharge tube and a power supply battery are assembled, and an insulating property that watertightly covers the device main body in a state where a sync signal input terminal for strobe light is exposed to the outside connected to a circuit board. Since the waterproof case is used, even if it is accidentally dropped into water, it is possible to prevent the generation of abnormal noise due to the intrusion of water into the inside. Also, when the battery leaks, there is no need to worry about the battery leaking out of the waterproof case, and there is no need to remove the battery from the developer, which is safe.

Further, since the strobe device including the exterior is independent, the strobe device can be used for changing the model of a film unit with a lens to be mounted or for other simple cameras. In addition, when a film unit with a lens is mounted, if the electrical junction is of a contact contact type, the mounting location of the strobe device can be freely arranged.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a strobe device embodying the present invention.

FIG. 2 is a perspective view showing an appearance of a film unit with a lens.

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

FIG. 4 is a front view when the strobe device is attached to a base of the main body.

FIG. 5 is a sectional view showing a configuration of a strobe device.

[Explanation of symbols]

 2 Film unit with lens 3 Unit main body 8 Strobe light emitting part 15 Main body base 17 Strobe device 30 Upper case member 31 Lower case member 32 Waterproof case 33 Device main body 44 Battery 45 Main condenser

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03C 3/00 575 G03C 3/00 575B 575H

Claims (3)

[Claims] 1. A circuit board on which a circuit pattern is formed,
A main capacitor and a display lamp constituting the strobe device are mounted, and a device main body in which a strobe light emitting portion including a discharge tube and a power supply battery are assembled, and an input terminal of a sync signal for strobe light connected to the circuit board. A waterproof strobe device for a film unit with a lens, comprising: an insulating waterproof case that covers the device body in a water-tight manner when exposed to the outside. 2. The lens according to claim 1, wherein the waterproof case comprises an upper case and a lower case, and a cylindrical storage portion is formed integrally with the lower case to store a main capacitor or a power supply battery. Waterproof strobe device for film units. 3. A waterproof strobe device for a lens-equipped film unit, wherein a front surface of a display lamp and a strobe light emitting portion is exposed in a watertight manner from a joint of an upper case and a lower case.