JPH11218810A - Film unit with lens provided with built-in stroboscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably position a main capacitor of stroboscope soldered on a printed circuit board in a film unit with a lens provided with a built-in stroboscope where the main capacitor of the stroboscope and a cylindrical battery used for the power source of the stroboscope are juxtaposed under a photographic image frame part for forming a photographic image plane by exposing film with subject light by a photographing lens. SOLUTION: The main capacitor C is arranged ahead of the cylindrical battery B, and at least the root of the lead Ca of the capacitor C is positioned on nearly the same surface as the surface having a conductive pattern of the printed circuit board 21 on which circuit parts for a stroboscope are mounted. Thus, in this film unit with a lens provided with the built-in stroboscope, the lead of the main capacitor is brought into contact with the printed circuit board and soldered without bending the lead of the main capacitor, so that the lead is hardly deformed and the main capacitor is accurately positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement of a main capacitor of a strobe and a cylindrical battery used for a power supply of the strobe in a film unit with a lens having a built-in strobe.

[0002]

2. Description of the Related Art In a conventional film unit with a built-in strobe, a cylindrical battery used as a main capacitor of the strobe and a power source of the strobe has large external dimensions. Therefore, various arrangements have been made for their arrangement. For example, a main condenser is arranged horizontally behind a strobe light-emitting unit, and AA batteries are arranged horizontally below a photographic image frame that forms a photographic screen by exposing subject light to film with a photographic lens. There is.
In some cases, the main condenser is disposed horizontally below the image frame, and the AA batteries are disposed vertically at the side of the strobe light emitting unit.

In recent years, the energy required for strobe light emission has been reduced due to improvements in the performance of photographic lenses, the sensitivity of films, and the efficiency of strobes.
As a result, the capacity of the main capacitor and the battery can be reduced, and the outer dimensions can be reduced.

As a result, a film unit with a lens, which uses a main capacitor having a smaller external dimension and a AAA battery and is horizontally arranged side by side below the photographic frame portion, is commercially available.

[0005]

As described above, in a film unit with a lens in which a main capacitor and a AAA battery are arranged horizontally below the photographing frame section, the main capacitor is located behind the AAA battery. Had been arranged. For this reason, the position of the conductive pattern on the printed circuit board is located far before the position of the lead of the main capacitor, and the lead was bent at a right angle to solder the lead to the conductive pattern. The dimension from the bent portion to the tip was longer. For this reason, in the strobe unit in which the main capacitor is soldered to the printed circuit board in advance, the bent long lead is easily deformed, and the position of the main capacitor is hard to be clearly determined. As a result, it becomes difficult to incorporate the strobe unit into the unit body. There was a problem.

Further, since the lead of the main capacitor to which a high voltage is applied is soldered to the printed circuit board across the positive or negative electrode of the battery, it is necessary to cover the lead with an insulating member.

The present invention has been made in view of such a problem, and an object of the present invention is to propose a film unit with a built-in strobe lens capable of stably positioning a main capacitor soldered to a printed circuit board.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide a main battery of a strobe and a cylindrical battery used as a power supply of the strobe below a picture frame for forming a picture by exposing a subject light to a film by a photographing lens. In a film unit with a built-in strobe built-in lens, the main condenser is arranged forward of the cylindrical battery,
According to another aspect of the present invention, there is provided a film unit with a built-in strobe lens, wherein at least a root of a lead of the main capacitor is located on substantially the same surface as a surface having a conductive pattern on a printed circuit board on which a circuit component for a strobe is mounted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a film unit with a lens having a built-in flash according to the present invention will be described in detail with reference to FIGS. 1 is a cross-sectional view of a film unit with a lens, FIG. 2 is a front view of the exterior member with a front surface thereof removed, and FIG. 3 is a vertical cross-sectional view.

First, the basic structure of a film unit with a lens will be described with reference to FIG. In the film unit with the lens, the patrone P is loaded into the patrone chamber 1a of the unit body 1 in the manufacturing process, and the unexposed film F drawn from the patrone P is wound around the roll film chamber 1b before being shipped. As the film F to be loaded into the film unit with the present lens, for example, a high sensitivity film of ISO800 is used.

When the user presses a release button (not shown), the shutter 2 is opened, subject light is imaged on the film F by the photographing lens L, and the film F is exposed to form a photographing screen. The space shielded from light for forming a photographing screen in this manner is referred to as a photographing frame portion 1c. And
The user rotates a winding knob (not shown) to wind the exposed film F into the cartridge P every time one frame is shot. Reference numeral 3 denotes an exterior member that covers and protects internal components.

The film unit with a lens according to the present invention has a built-in strobe, and large-sized components of the strobe include a strobe light emitting section, a strobe circuit board, a main capacitor, and a battery.

In the present embodiment, a cylindrical type AAA battery is used as the battery B, and its outer diameter is 10.5 mm and its overall length is 44.5 mm. As shown in FIG. 2 and FIG. 3, below the photographing image frame portion 1c, it is horizontally arranged in a space formed by the outer wall of the patrone room 1a and the outer wall of the roll film room 1b. A resiliently movable positive contact piece 11 is pressed against the shoulder of the positive electrode of the battery B, and a fixed negative contact piece 12 is in contact with the negative electrode. The distance between the outer wall of the patrone chamber 1a and the outer wall of the roll film chamber 1b is a minimum distance in which the battery B can be disposed in the longitudinal direction and the positive electrode contact piece 11 and the negative electrode contact piece 12 can be disposed. I have.

The main capacitor C has a capacity of 15 μF or more and 80
It has a capacity of less than μF and its outer diameter is 1
0.5 mm or less, and the overall length is 44 mm or less. That is, the external dimensions are equal to or smaller than the AAA battery, and the overall length is shorter than the overall length of the AAA battery. For example, a main capacitor having an outer dimension of 10.5 mm, a total length of 27 mm, and a capacity of 70 μF is used. Similarly, the battery B is horizontally arranged below the photographing frame 1c in the space defined by the outer wall of the patrone chamber 1a and the outer wall of the roll film chamber 1b.

The printed circuit board 21 is disposed between the vicinity of the outer wall located in front of the roll film chamber 1b (subject side) and the outer wall of the photographing frame 1c.
Is inserted into a hole provided in the printed circuit board 21 and soldered by a conductive pattern provided on the front surface of the printed circuit board 21.

Further, bosses 1f, 1e, which are respectively provided on flat portions 1d, 1e provided in front of the outer wall of the roll film chamber 1b.
1g, the reference hole 21b and the long hole 21c of the printed circuit board 21
Are respectively inserted, and the bosses 3 erected inside the flat portions 1 d, 1 e, 1 h of the unit main body 1 and the exterior member 3.
The printed circuit board 21 is sandwiched and positioned between the printed circuit board 21 and a.

Further, as shown in FIGS. 1 and 3, the main capacitor C is disposed forward of the battery B, and the center of the main capacitor C is disposed above the center of the battery B. The reason for this is that the lead Ca of the main capacitor C is provided by disposing the main capacitor C in the front.
This is because it can be soldered to the conductive pattern by being brought into close contact with the printed circuit board 21 while keeping it straight without bending. Although the elongated lead Ca may be deformed due to transportation or the like, the main capacitor C is positioned such that at least the root of the lead Ca is located on substantially the same surface as the surface of the printed circuit board 21 having the conductive pattern. I have.

The length of the main capacitor C is the length of the battery B
Since the main condenser C is arranged to be shifted leftward until it comes into contact with the outer wall of the patrone room 1a, a space is generated in front of the battery B below the photographing frame 1c. Printed circuit board 2
1 may be extended, and the lead Ca may be soldered to a part 21a of the extended printed circuit board. In this way, the printed circuit board 21 has a margin, and smaller electric components can be mounted on the extended printed circuit board part 21a. Therefore, the size of the printed circuit board 21 excluding the extended printed circuit board part 21a is reduced. Can be reduced, and as a result, the distance between the photographic image frame portion 1c and the roll film chamber 1b can be reduced, and the film unit with a lens can be reduced in size.

As described above, since it is not necessary to bend the lead Ca of the main capacitor C as in the related art, there is no problem that the lead is deformed in the strobe unit and the position of the main capacitor is shifted.

As shown in the enlarged view of FIG. 4, only the tip of the lead Ca of the main capacitor C is bent and penetrated through a hole formed in a part 21a of the printed circuit board which is extended, so that the main capacitor C is formed. Can be more clearly determined.

The center of the main capacitor C is the battery B
Is located above the center of the photographing lens L
Since the wall of the photographing frame 1c is inclined on all four sides due to the light from the to the corner of the photographing screen, the space defined by the outer wall on the lower side of the photographing frame 1c and the exterior member 3 on the bottom is forward. Is formed wider than the rear side. For this reason, by arranging the main capacitor C above the battery B, it is possible to reduce the front portion of the bottom surface of the exterior member 3 as shown in FIG.

[0022]

According to the film unit with a built-in strobe lens according to the first and third aspects, the lead of the main capacitor can be soldered in close contact with the printed circuit board without bending the lead. It is difficult to deform and the position of the main capacitor is accurately determined.

According to the film unit with a built-in strobe lens according to the second aspect, the front part of the bottom surface of the exterior member can be cut down to make it more compact.

According to the film unit with the built-in strobe lens according to the fourth aspect, the position of the main condenser is more clearly determined.

According to the film unit with a built-in strobe according to the fifth aspect of the present invention, the printed circuit board has a margin, and as a result, the distance between the photographing frame portion and the roll film chamber is reduced, so that the film unit with the lens can be reduced in size. Can be

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a film unit with a lens.

FIG. 2 is a front view of a film unit with a lens with a front surface of an exterior member removed.

FIG. 3 is a longitudinal sectional view of a film unit with a lens.

FIG. 4 is an enlarged view of a lead of a main capacitor.

[Explanation of symbols]

 F film L photographing lens C main condenser Ca lead B battery 1 unit body 1a patrone room 1b roll film room 1c photographing frame part 3 exterior member 21 printed board 21a part of extended printed board

Claims (5)

[Claims] 1. A film with a built-in strobe lens in which a main condenser of a strobe and a cylindrical battery used for a power supply of the strobe are juxtaposed below a photographing frame portion for forming a photographing screen by exposing subject light to a film by a photographing lens. In the unit, the main capacitor is disposed forward of the cylindrical battery, and at least the root of the lead of the main capacitor is located on substantially the same surface as the surface having the conductive pattern on the printed circuit board on which the strobe circuit component is mounted. A film unit with a built-in strobe lens. 2. The film unit with a built-in strobe lens according to claim 1, wherein the center of the main condenser is located above the center of the cylindrical battery. 3. The printed circuit board according to claim 1, wherein the conductive pattern is disposed on the front side, and the lead of the main capacitor projects straight and is soldered to the conductive pattern. 2. A film unit with a built-in strobe lens according to 1. 4. The film unit with a built-in flash according to claim 3, wherein the ends of the leads of the main condenser are bent at substantially right angles and penetrated through holes formed in the printed circuit board. 5. The cylindrical battery is a AAA battery, the main capacitor is shorter than the AAA battery, and the main capacitor is provided on a part of the printed circuit board extending in front of the AAA battery. 5. The film unit with a built-in strobe lens according to claim 1, wherein the lead is soldered. 6.