JPH11258666A - Stroboscope device for film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stroboscope device for a film unit with a lens by which the high density mounting of a circuit part adding a new function is made possible without making a circuit board large-sized. SOLUTION: A positive side battery contact piece 54 is constituted of an engaging part 54a formed of a metal plate which is entirely thin by bending it and intruded into the engaging hole 44a of the circuit board 44 and perpendicularly engaged with the circuit board 44, an extended part 54b rectangularly bent from the engaging part 54a and extended so as to cover a part of the circuit board in a state of being spaced apart from the circuit board 44 by a specified distance and a contact part 54c brought into contact with the extended part extended so as to cover the part of the circuit board in parallel with the facial direction of the circuit board and the positive pole of a power source battery. Then, a chip part 71 is mounted even at a part covered with the extended part 54b of the positive side battery contact piece 54 inside of the circuit board 44. Thus, the mounting of a new chip part 71 is made possible even at the part of the circuit board conventionally covered with a battery contact so as to be held between the circuit board 44 and the extended part 54b of the positive side battery contact piece 54, so that the circuit part to add the new function is mounted without making the circuit board 44 large-sized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A film unit with a lens, which is provided with a simple photographing mechanism and is loaded with an unexposed photographic film and a patrone in advance, includes an indoor unit having a short exposure light amount and a night time. Some are equipped with a strobe function corresponding to shooting. Such a strobe device of a film unit with a lens includes a strobe light emitting unit including a strobe discharge tube, a circuit board on which a strobe circuit for emitting the strobe light is formed, a battery serving as a power source, and an electrode holding and holding the battery. And a battery contact piece that comes into contact with the battery.

[0003] The flash unit of a film unit with a lens at the early stage of release has a relatively large unit body.
Since the configuration of the strobe circuit was also simple, there was room for the arrangement of components on the circuit board, and a relatively free layout was possible. However, in recent years, the miniaturization of the film unit with a lens has been greatly advanced, and accordingly, the strobe device has been required to be miniaturized.

[0004]

However, recent film units with lenses have come to be equipped with new functions such as a function of exposing information indicating a print size to a photographic film at the same time as miniaturization. It has been extremely difficult to mount the circuit components constituting these components on a circuit board on which electrical components have already been mounted at high density without increasing the size of the conventional board.

An object of the present invention is to solve the above-mentioned problems, and to provide a strobe device for a film unit with a lens that enables high-density mounting of circuit components to which new functions are added without increasing the size of a circuit board. Is provided.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a circuit board, a strobe discharge tube, a battery, a battery, a battery, a battery, and a battery. A film with a lens which is incorporated in a film unit with a lens, which is made up of a battery contact piece or the like which makes the strobe circuit and the electrode conductive by contacting any one of the electrodes, and which stores an unexposed photographic film cartridge and has a simple photographing mechanism. In the unit strobe device, any one of the battery provided at one end of the extension, an engagement portion inserted and engaged perpendicularly to a surface direction of the circuit board, an extension extending from the engagement portion, and one end of the extension. The battery contact piece is constituted by a contact portion that comes into contact with the electrode described above, and components constituting the strobe circuit are mounted near the engaging portion.

According to a second aspect of the present invention, the extension portion is bent at a right angle from the engagement portion, and is separated from the circuit board by a predetermined width in parallel with a surface direction of the circuit board. A part of the circuit board that is extended so as to cover a part thereof and a part of the strobe circuit is mounted in a part of the circuit board covered by the extension part in a gap between the extension part and the circuit board.

[0008]

FIG. 2 shows the appearance of a lens-fitted film unit equipped with a flash device according to the present invention. The lens-fitted film unit 2 includes a unit main body 3 in which a film cartridge is previously loaded and various photographing mechanisms are incorporated, and an exterior paper 4 partially covering the unit main body 3.

A shutter button 6 and a counter window 7 are provided on the upper surface of the unit body 3, and a finder 8, a photographing lens 9, a strobe charging operation button 10, and a strobe light emitting unit 1 are provided on the front.
1 and the like are provided. Also, a winding knob 12 that is rotated from one frame to another is exposed from the rear side. The exterior paper 4 has an adhesive applied to the back surface and is adhered so as to be wound around the central portion of the unit main body 3, and has an opening for exposing the photographing lens 9, the finder 8, the counter window 7, and the like to the outside.

As shown in FIG. 3, the unit main body 3 includes a main body base 16 in which the film cartridge 14 is loaded,
An exposure unit 17 and a strobe device 18 are attached to the front surface of the main body 16, and a front cover 19 and a rear cover 20 are attached to cover the front and back sides of the main body 16. Assembled by engagement.

The film cartridge 14 comprises a plastic cartridge body 22 and a photographic film 23 housed in the cartridge body 22. A photo film 23 is provided in the cartridge body 22.
A spool 25 to which one end is locked is rotatably incorporated, and further has a built-in film sending mechanism as disclosed in JP-A-6-266053. Also,
A bar-shaped light-shielding lid 26 that opens and closes the film entrance and exit by being rotated from the outside is incorporated in a film entrance and exit (not shown) through which the photo film 23 enters and exits the cartridge main body 22 instead of the conventional telephone. I have.

In the APS-compatible photographic film 23, two large and small perforations 28, 29 having different sizes are alternately arranged along one side edge at two kinds of intervals. The perforations 28 and 29 are used to set the leading and trailing sides of each frame 30 in the film feeding direction.
In the film unit 2 with a lens, the photographic film 23 is wound into the cartridge body 22 every time a photograph is taken. Therefore, the large perforation 28 indicates the front side in the film feeding direction, and the small perforation 29 indicates the rear side. Each of the perforations 28 and 29 is provided in a number corresponding to the number of the frames 30.

At the center of the main body 16, there is provided a light-shielding tube 34 for shielding the photographing optical path from the exposure unit 17 mounted on the front side to the photographic film 23. On the back side of the light-shielding tube 34, an aperture is formed which defines the exposure range of the photographic film 23.
A film supporting surface 20a is formed on the rear cover 20 so as to face the aperture. On the front side of the light-shielding tube 34, an opening 38 for guiding the subject light transmitted through the photographing lens 9 to the aperture is formed. An opening 34a for exposing a sprocket incorporated in the exposure unit 17 toward the photographic film 22 is formed above the light-shielding cylinder 34.

On both sides of the light-shielding tube 34, a cartridge chamber 36 and a film roll chamber 37 in which a cartridge body 22 and a film roll 35 in which the photographic film 23 is wound in a roll shape are accommodated in a manufacturing stage. Each is formed integrally.

The cartridge chamber 36 and the film roll chamber 37 have a rear cover 20 attached to the rear side of the main body base 16 and a bottom lid 39 for the cartridge chamber integrally formed with the rear cover 20, and a film roll chamber 37 for the film roll chamber. When the bottom cover 40 is closed, an appropriate light shielding ability can be obtained. The bottom cover 39 and the bottom cover 40 are connected to the rear cover 20 via a bendable thin portion. The bottom cover 39 is used to take out the film cartridge 14 from the used film unit 2 with lens. Open to the public.

The hoisting knob 12 is rotatably mounted on the upper part of the cartridge chamber 36. The hoisting knob 12 has a gear formed on the outer periphery, and a drive shaft formed on the lower surface is engaged with a spool 25 of the cartridge body 22. The photo film 22 is wound up by the spool 25 by being rotated counterclockwise in the drawing every time one frame is shot. Further, the winding knob 12 is prevented from rotating in the reverse direction by the engagement of the check pawl 42 formed on the upper surface of the cartridge chamber 36 with the gear.

Although not shown, the cartridge chamber 36
When the film cartridge 14 is taken out of the cartridge chamber 36, a light-shielding lid closing mechanism that closes the light-shielding lid 26 in conjunction with opening of the bottom lid 39 is incorporated in the upper surface and the side surfaces of the cartridge.

The exposure unit 17 includes a well-known shutter charging mechanism, a film wrapping mechanism, a counter feed mechanism, a shutter driving mechanism and a shutter blade, and a photographing unit, similarly to a conventional lens-fitted film unit using a 135-size photographic film. In addition to including the lens 9 and the like, the objective lens and the eyepiece constituting the finder 8 are unitized. Further, the exposure unit 17 is provided with a sprocket that meshes with the perforations 28 and 29 of the photographic film 23 through the opening 34a on the upper part of the light shielding cylinder 17 and is rotated by the transfer of the photographic film 23. The sprocket serves as a drive source for the above-described shutter charging mechanism, film winding mechanism, and counter feed mechanism.

As shown in FIG. 4, the strobe device 18 comprises:
It is composed of a circuit board 44 provided with a strobe circuit, a strobe light emitting section 11 assembled to the circuit board 44, and battery contact pieces 53 and 54.

The circuit board 44 is provided with various electric components such as a main capacitor 48 constituting a strobe circuit described later, a strobe charging switch 49 and a synchro switch 50. Strobe charge switch 49
(See FIG. 3) is a metal contact piece disposed on the back side of the flash charging operation button 10 formed on the front surface of the front cover 19, and is pressed onto the copper foil portion of the circuit board 44 by pressing the flash charging operation button 10. Touch and close the flash circuit to charge the flash. The synchro switch 50 includes two switch pieces made of metal, and
When pressed by the swinging of the shutter blades incorporated in the camera, the two switch contact pieces come into contact with each other to emit a strobe light.

Above the circuit board 44, there is provided a charge completion lamp 65 which lights up when the charging of the main capacitor 48 is completed. At the lower part of the circuit board 44, a plus-side battery contact piece 54 for connecting the plus pole 52a and the minus pole 52b of the power supply battery 52 to the strobe circuit, and a minus-side battery contact piece 53 are attached. The power supply battery 52 includes a positive battery contact piece 54 and a negative battery contact piece 5.
3, is disposed below the light-shielding tube 34 of the main body base 16, and is provided with a bottom cover 39 provided on the rear cover 20.
The bottom surface side is protected by 40 and the bottom plate 41.

The strobe light emitting section 11 includes a strobe discharge tube 45 for emitting strobe light, and a reflector 46 for reflecting light emitted from the strobe discharge tube 45 toward a subject.
And a diffusion plate 11a for diffusing the light from the discharge tube 45. The diffusion plate 11a is exposed to the outside through a light-emitting-portion opening 19a formed in the upper part of the front cover 19.

The strobe circuit formed on the circuit board 44 is a well-known strobe circuit. For example, as shown in FIG. 5, when the strobe charging switch 49 is turned on, the current of the power supply battery 52 is converted to alternating current. And a booster circuit 56 that boosts the voltage to about 300 V, converts the current into a direct current again, and applies the DC voltage to the main capacitor 48, and a trigger circuit 57 that generates a trigger signal when the synchro switch 50 is turned on to perform strobe light emission. .

As shown in FIG. 1, the positive battery contact piece 54
Is formed by bending a thin metal plate as a whole.
And an engagement portion 54a which penetrates into the engagement hole 44a and vertically engages with the circuit board 44, and a part of the circuit board which is bent at a right angle from the engagement portion 54a and is separated from the circuit board 44 by a certain width. An extension 54b extending so as to cover the circuit board, an extension extending so as to cover a part of the circuit board in parallel with the surface direction of the circuit board, and a contact 5 contacting the positive pole 52a of the power supply battery 52.
4c.

The chip component 71 is also mounted on a portion of the circuit board 44 which is covered by the extension 54b of the positive battery contact piece 54. As described above, a part of the circuit board which was conventionally covered with the battery contact piece is also changed as shown in FIG.
Since the extension 54b of the positive battery contact piece 54 is attached so as to extend with a gap from the circuit board 44, the extension 54b is newly inserted between the circuit board 44 and the extension 54b of the positive battery contact piece 54. Since the chip component 71 can be mounted, a circuit component for adding a new function can be mounted without increasing the size of the circuit board 44. Examples of the chip component 71 include a component of an exposure circuit for instructing a print size on a photographic film.

Further, by covering the mounting portion of the chip component 71 with the extension 54b of the positive battery contact piece 54, the small chip component 71 at the end of the circuit board 44, which is easily damaged, is protected from an impact or the like. It is effective in preventing damage.

In each of the above embodiments, the APS-compatible lens-fitted film unit has been described as an example. However, the present invention can be applied to a lens-fitted film unit for loading a 135-size photographic film cartridge. It is possible. Further, the chip component is not limited to a component of the exposure circuit for instructing the print size on the photographic film.

FIG. 7 is a perspective view showing a second embodiment of the present invention. In this embodiment, the extended portion 81a of the positive battery contact piece 81 is cut off at the engaging portion 81b. As described above, by inserting and engaging the engaging portion 81b of the plus-side battery contact piece 81 perpendicularly to the circuit board 82, the circuit component 83 can be mounted near the engaging portion 81b. This contributes to space saving and miniaturization of the circuit board.

[0029]

As described above, according to the present invention, a circuit board on which components required for a strobe circuit are assembled, a strobe discharge tube, a battery, the battery, and one of the electrodes of the battery. The strobe device for a film unit with a lens, which is composed of a battery contact piece or the like that makes contact with the strobe circuit and an electrode to be in contact with the film film unit and has a simple photographing mechanism in which an unexposed photographic film cartridge is housed, An engagement portion that is inserted and engaged perpendicularly to the surface direction of the circuit board, an extension extending from the engagement portion, and provided at one end of the extension;
The battery contact piece is configured from a contact portion that contacts one of the electrodes of the battery, and the components constituting the strobe circuit are mounted in the vicinity of the engagement portion, so that the circuit board is not increased in size. Further, it is possible to provide a strobe device for a film unit with a lens that enables high-density mounting of circuit components to which a new function is added.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a circuit board and a battery contact piece of a flash unit for a film unit with a lens according to the present invention.

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

FIG. 3 is an exploded perspective view showing a configuration of a unit main body.

FIG. 4 is an external perspective view showing a strobe device.

FIG. 5 is a circuit diagram showing an example of a strobe circuit.

FIG. 6 is a partial sectional view of FIG. 3;

FIG. 7 is a perspective view showing a second embodiment of the present invention.

[Explanation of symbols]

 2 Film unit with lens 3 Unit body 6 Release button 9 Shooting lens 11 Strobe light emitting unit 14 Photo film cartridge 18 Strobe device 19 Front cover 20 Rear cover 37 Film roll room 44 Circuit board 48 Main capacitor 50 Trigger contact piece 54 Positive battery contact Piece 54a engaging part 54b extension part

Claims (2)

[Claims] 1. A circuit board on which parts necessary for a strobe circuit are assembled, a strobe discharge tube, a battery, and a battery. A strobe device for a film unit with a lens, which is composed of a battery contact piece and the like, which stores an unexposed photographic film cartridge and has a simple photographing mechanism, and which is incorporated in a film unit with a lens, wherein the strobe device is inserted perpendicularly to the surface direction of the circuit board. An engaging portion to be engaged, an extending portion extending from the engaging portion, and a contact portion provided at one end of the extending portion and in contact with any one of the electrodes of the battery constitute the battery contact piece, A strobe device for a film unit with a lens, wherein components constituting the strobe circuit are mounted near the engaging portion. 2. The extension portion is bent at a right angle from the engagement portion, and extends so as to cover a part of the circuit board in a state of being separated from the circuit board by a certain width in parallel with a surface direction of the circuit board. 2. The lens-equipped film according to claim 1, wherein a part of the strobe circuit is mounted in a gap between the extension portion and the circuit board, which is a part of the circuit board covered by the extension portion. Strobe device for unit.