JP3113437B2 - Film unit with lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A low-cost film unit with a built-in film and a simple photographing mechanism built into a film unit includes a film unit with a lens equipped with a strobe device (trade name: Flash "etc.). Such a film unit with a lens has a thickness slightly larger than the diameter of the 135 film with a patrone, thereby improving portability. Further, since a 135 film with a patrone is used, a print photograph can be provided at low cost using a current photographic printer. However, recently, the size of a camera has been developed with a target of a credit card size or a cigarette size, and it has been desired to improve the size of the above-described film unit.

Further, since a strobe device used for a film unit with a lens needs to be as low as possible in cost, it is desired to simplify the structure of the strobe device and reduce the cost by mass production. In addition, in order to provide the strobe device within a limited space of the film unit with a lens in accordance with the trend of the above-mentioned compactness, it is necessary to make the flash unit as small as possible.

FIG. 4 is an exploded perspective view of a film unit with a built-in flash. The unit main body 2 includes a main body base 5 to which an exposure unit 3 and a strobe unit 4 and the like incorporating a photographic lens and a shutter mechanism are attached,
It comprises a front cover 6 placed on the front surface, a rear cover 7 placed on the back surface of the main body 5, and a film 8 with a patrone stored in the unit body 2. The strobe unit 4 includes a light emitting unit 9 including a discharge tube, a diffusion plate, a reflection plate, a holding member, and the like, an electric component 10 forming a strobe circuit such as a capacitor, and a printed board 11 to which these are attached. Although not shown, the strobe unit 4 also includes a dry battery serving as a power supply of the strobe device and a piece of the dry battery.

[0005] The strobe unit 4 is mounted on the main body base 5, as shown in the figure, the mounting position is on the right side of the exposure unit 3 also mounted on the main body base 5, and the unexposed light formed on the main body base 5 is formed. 2 is a front view of an outer wall of a film roll chamber 12 for storing a photographic film. The light emitting section 9 and the condenser 10 are accommodated in the upper part of the film roll chamber 12, and the printed board 11 is held by the main body base 5 by engaging the claws 14 of the main body base 5 with the openings 13 formed in the substrate. A charging switch 15 for starting charging of the strobe device is formed on the front cover 6, and a contact 16 made of a thin metal plate is attached to the back side of the charging switch 15, and the charging switch 15 is formed on the printed circuit board 11. This is performed by short-circuiting the conductive surface 17 at some places. Then, when the shutter button is pressed, the flash is emitted simultaneously with the photographing.

[0006]

Upper SL film unit [SUMMARY OF THE INVENTION] are inadequate from the viewpoint of miniaturization. When minimizing the size of the lens-fitted film unit, the size of the film is limited especially when the film unit is thinned, and the size is determined by adding a patrone storage chamber for storing a patrone or a film roll chamber + a strobe device . In the specification of Japanese Patent Application No. 3-228287 filed by the present applicant, the problem of the patrone storage room is solved by thinning the parts other than the patrone storage room and using the protruding patrone storage room as a grip for photographing. However, the flash unit
Since it is located in front of the film roll room,
The parts other than the storage room were not thinned. Also,
A flash charging contact or flash placed on a printed circuit board
Optical unit reduces the thickness of film units with lenses
Was even more inhibited.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a lens-fitted film unit in which the arrangement of a printed circuit board constituting a strobe device is changed so as to make it thinner.

[0008]

To achieve the above object, according to the solution to ## the inventions of claim 1, wherein the exposure unit and the film roll chamber
Between the outermost wall of the film roll chamber and the foremost end of the outer wall.
The print that composes the strobe device behind the front end
Place the board and project from the back side of this printed board
The electric parts assembled as described above are housed in the gap between the exposure unit and the outer wall of the film roll chamber.

Further inventions described in claim 2, printed circuit board
Short-circuit the contacts formed on the
The contact piece to be formed is made of a thin metal plate,
On the opposite side of the printed circuit board with the front end of
One of the contact pieces is located behind the foremost end of the outer wall of the Muror room.
Attach the end and attach the contact piece to the front end of the film roll outer wall.
Pass through the front of the film roll chamber, and
The other end of the contact piece faces the contact point behind the bridge .

Further, inventions of claim 3 includes a discharge tube,
Reflective umbrella, diffuser, and plastic
Light emitting unit of strobe device consisting of stick holding frame
So that it projects in the direction of the surface of the printed circuit board.
Attach the light emitting unit to the edge of the printed circuit board
In this case, the holding means is provided on the holding frame.

[0011]

FIG. 2 shows a disassembled state of a film unit with a lens according to the present invention.
And a front cover 24, a rear cover 25, and a film 26 with a patrone (see FIG. 1).

The main body base 21 is formed by integral molding of a resin, and a patrone storage chamber 21 for storing a patrone.
a, and a film roll chamber 21b for storing the film in a roll shape. The patrone storage chamber 21a projects slightly forward from the film roll chamber 21b. An aperture for determining the exposure range of the film is exposed on the back side. Patrone storage room 21
A winding knob 27 provided with a knurled shaft that engages with the core of the patrone is disposed above “a”. The take-up knob 27 is rotated in the direction of the arrow in the drawing to rotate the core in a direction in which the photographed film is wound into the cartridge. Note that an exposure unit 22 and a strobe unit 23, which will be described in detail later, are incorporated in the main body base 21.

The front cover 24 is formed with a photographing window 24a, a finder objective window 24b, a shutter button 24c, an opening 24d for a strobe light emitting section, a strobe charging switch 24e, and the like. The front cover 24 is formed with a protrusion 24g corresponding to the protrusion of the patrone storage chamber 21a, and the protrusion 24g serves as a grip during photographing.

The rear cover 25 has a film support surface 25a formed at a portion facing the aperture, and has a patrone storage chamber 21a and a film roll chamber 21 on its bottom side.
and b. Pull-top lids 25b and 25c that cover the bottom surface of b. The cover 25b serves as a take-out cover for taking out the cartridge containing the exposed film.

The exposure unit 2 2, number display plate, the locking lever, a shutter drive lever, a shutter blade, a film winding mechanism and shutter mechanism consisting of a driven sprocket or the like, photographing lens, an eyepiece finder lens or the like is incorporated
Have been. The exposure unit 22 projects from the front of the main body base 21.
It is detachably attached to the front of the light-shielding cylinder 21d
The exposure unit 22 and the light-shielding cylinder 21d
An exposure unit for exposing the photographic film is configured.

As shown in FIG. 3, the strobe unit 23
Is composed of a printed circuit board 28 and a light emitting unit 29. The printed circuit board 28 includes electrical components such as a capacitor 30 constituting a strobe circuit, a light emitting switch 31 turned on by a shutter mechanism of the exposure unit 22, and a contact piece 32a for connecting a dry battery serving as a power supply of the strobe device. , 32b. Piece
33 (see FIG. 2) is operated by the flash charging switch 24e.
When made, the conductive surface of the printed circuit board 28 was exposed.
The contact portions 28a and 28b come into contact and short-circuit,
Start electricity. The contact piece 33 is formed of a thin metal plate.
One end folded into a box shape is a film roll chamber 2
1b is inserted into a groove 21c provided on the outer wall of the main body 1b.
It is attached to the part 21. Groove 21c is a film roll
It is located behind the foremost end of the outer wall of the chamber 21b.
Has an effect on the thinning of film units with lenses.
Not. The other end of the contact piece 33 is connected to the film roll chamber 21c.
Passing in front of the foremost end, the outermost wall of the film roll chamber 21b
It faces the printed circuit board 28 behind the front end. Contact
Arranged in front of the foremost end of the film roll chamber 21b of the piece 33
The part to be cut remains thin without being bent.
Does not hinder the thinning of a film unit with
No.

The light emitting unit 29 comprises a diffusion plate 34, a reflector, a discharge tube (not shown), and a resin holding frame 35 for holding these. The reflector and discharge tube are
The diffusion plate 34 is held inside the holding frame 35 and the diffusion plate 34
Is attached from the front by engaging with the claw 35a. The printed circuit board 28 of the light emitting unit 29
Is attached to the holding frame 35 by an attaching means.
This is done. Attachment means, the support piece 36 and the projecting pieces 37, 38 Metropolitan consisting formed on the side surface of the holding frame 35 projection
The printed circuit board 28 is sandwiched between them,
Hook claws 37a provided at the tip of the 7, 38, that engage <br/> allowed the opening 39, 40 formed to 38a on the printed circuit board 28. The light emitting unit 29 is located in the surface direction of the printed circuit board 28.
Attached to the edge of the printed circuit board 28 so that it projects
Can be As a result, the printed circuit board and the light emitting unit
Because they do not overlap in the front-back direction,
The side can be made thinner. The projections 41 a and 41 b provided on the upper part of the holding frame 28 are
Support the capacitor 30 located behind the.

FIG. 1 is a sectional view of the unit body 20 .
In Suyo, printed circuit board 28, and the side surface of the light-shielding tube 21d
Insert the film roll between the front end of the film roll
The rear wall is disposed behind the foremost end of the outer wall of the cabinet. Electrical component 42, so attached to the surface of the body base 21 side of the printed circuit board 28, fits between the shielding tube 21d and the film roll chamber 21b. This allows the strobe unit
Of the film unit with lens in the mounting part of
The thickness can be reduced. Strobe unit 23
Is attached to the main body base 21 by a claw 21 e provided on the main body base 21 and an opening 43 formed in the printed circuit board 28.
And the long hole 4 provided in the lower part of the holding member 35.
4a and the hole 44b are engaged with projections 45 and 46 formed on the front surface of the outer wall of the film roll chamber 21b, and the printed circuit board 2 is inserted into the ridges 47 formed on the outer surface of the film roll chamber 21b.
8 is placed. Among the electrical components attached to the printed circuit board 28, the largest charging capacitor 30 is arranged behind the light emitting unit 29. Since the light emitting section 29 and the capacitor 30 protrude from the printed circuit board 28, the film storage chamber 2
1b.

In the above-described embodiment, the grip is formed by projecting the front surface of the unit on the patrone storage chamber side. However, the grip may be formed by flushing the front surface and projecting the rear surface.

[0020]

As described above, the film unit with a lens according to the present invention can be used with the side of the exposure unit and the outside of the film roll chamber.
Between the front end of the wall and the front end of the outer wall of the film roll
The printed circuit board that constitutes the strobe device behind the
Place the electrical components assembled on this printed circuit board
It was arranged in the gap between the exposure section and the outer wall of the film roll chamber.
To reduce the thickness in the front-rear direction near the strobe device
be able to. Also, start charging the flash device
The contact piece is a pudding that sandwiches the foremost end of the film roll room outer wall.
One end is attached to the outer wall of the film roll chamber on the opposite side of the substrate
The other end of the contact piece to the foremost end of the film roll chamber outer wall.
Since it passed through and faced the contact point, it was close to the charge switch.
The thickness of the side can be reduced. In addition, the light emitting unit
The printed board so that it projects in the direction of the surface of the printed circuit board.
Since it is attached to the edge of the plate, the thickness near the light emitting unit
The thickness can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a film unit with a lens according to the present invention.

FIG. 2 is an exploded perspective view showing a film unit with a lens according to the present invention.

FIG. 3 is a perspective view illustrating an appearance of a strobe unit.

FIG. 4 is an exploded perspective view of a conventional film unit with a lens.

[Explanation of symbols]

 Reference Signs List 20 unit main body 21 main body base 21b film roll chamber 22 exposure unit 23 strobe unit 28 printed circuit board 29 light emitting unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-45802 (JP, A) JP-A-5-19419 (JP, A) JP-A-5-173239 (JP, A) 16434 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03C 3/00 G03B 17/04

Claims (3)

(57) [Claims] An aperture for determining an exposure range for a photographic film.
An aperture is provided and this aperture is
On one side to hold rolled photo film
The Ilm roll room has a patrone for storing the patrone on the other side.
A main body base in which a throne storage chamber is formed, and the main body base
And located behind the aperture.
A film unit with a lens having an exposing unit for exposing the photographic film to light , wherein a portion between the exposing unit and a foremost end of a film roll chamber outer wall is provided.
Then, behind the foremost end of the film roll chamber outer wall,
Arrange the printed circuit board that composes the strobe device, and
An electrode mounted on the printed circuit board so as to protrude to the rear
A film unit with a lens, wherein said parts are housed in a gap between said exposure unit and the outer wall of the film roll chamber. 2. A contact portion formed on the printed circuit board,
Is the contact piece that is short-circuited to start strobe charging a metal sheet?
And sandwich the foremost end of the outer wall of the film roll chamber.
On the opposite side of the printed circuit board,
Attach one end of the contact piece at a position behind the front end,
Pass the contact piece in front of the foremost end of the film roll chamber outer wall.
Contact point behind the foremost end of the film roll chamber outer wall.
The other end of the contact piece faces the portion.
The described film unit with lens. 3. A strobe device comprising: a discharge tube ;
And a diffusion plate, and a plastic
It includes a light emitting unit comprising a click-made holding frame, printed
Print the light emitting unit so that it protrudes in the surface direction of the substrate.
Mounting means for attaching to the edge of the
The film unit with a lens according to claim 1 or 2, wherein the film unit is provided with a lens.