JPH11167149A - Stroboscope device for film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce production costs and simultaneously, facility space required for a trigger armature attaching process, for effectively making use of manufacturing facilities by simplifying the trigger armature attaching process and reducing an assembling time. SOLUTION: A trigger coil 45 consists of a coil part 45a, a lower terminal 45b and a top output terminal 45c. A trigger armature 46 is attached to the output terminal 45c. The trigger armature 46 is formed from a metallic sheet having elasticity, an engaging hole 46a is formed at one end of the trigger armature 46 and a contact end 46b is formed at the other end. The output terminal 45c of the trigger coil 45 is inserted through the engaging hole 46a of the trigger armature 46. A fall-off preventing plate 46c bent in the direction of inserting the output terminal 45c through is integrally formed on one side of the engaging hole 46a and brought into press-contact with the output terminal 45c by elastic force, to electrically connect the output terminal 45c and the trigger armature 46.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flash unit for a film unit with a lens.

[0002]

2. Description of the Related Art A film unit with a lens is a unit body having a simple photographing mechanism in which an unexposed roll film with a patrone is built in advance, so that a photograph can be easily taken without carrying a camera. It is widely used because it can be performed at a low cost and is easy to use, and a camera with a built-in strobe device is also on the market so that it can be easily taken indoors or at night.

As is well known, the above-described strobe device for a film unit with a lens charges a main capacitor with a boosted current, and generates a high voltage current with a trigger coil in conjunction with a shutter device. The main capacitor is discharged by applying the current to the strobe discharge tube with the trigger contact to ionize the inside of the discharge tube, and the strobe light is emitted from the strobe discharge tube.

In the above-described strobe device, a trigger contact for guiding a high voltage current from a secondary output terminal of a trigger coil to a strobe discharge tube is conventionally provided with one end of the trigger coil.
A metal plate or a lead wire soldered to the secondary output terminal and having the other end connected to the reflector has been used.

[0005]

However, as described above, the soldering between the metal plate or the lead wire and the secondary output terminal of the trigger coil is troublesome and requires a long assembling time. It is an obstacle in terms of downtime and productivity improvement. The soldering process requires periodic maintenance in terms of production management, and has problems such as high power consumption and solder consumption.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems of the prior art, and simplifies a process of attaching a trigger contact of a strobe device for a film unit with a lens, and reduces assembly time, thereby reducing manufacturing costs. In addition, it is another object of the present invention to reduce the equipment area required for the step of attaching the trigger piece and to effectively use the manufacturing facility.

[0007]

In order to achieve the above object, the present invention provides a gas-filled strobe discharge tube,
A trigger coil for generating a high voltage current for starting discharge in the strobe discharge tube, and a trigger piece that contacts the strobe discharge tube and transmits the high voltage current output from the trigger coil to the strobe discharge tube. Have
In the strobe device for a film unit with a lens attached to the film unit with a lens, a bending plate bent in a direction in which the secondary output terminal of the trigger coil penetrates is integrally provided at one end of the trigger contact piece. The trigger contact piece is pressed against the output terminal by elasticity.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is an external perspective view showing a film unit with a lens embodying the present invention, and FIG. 3 is an exploded perspective view thereof. The film unit 2 with a lens
It is composed of a unit main body 3 containing a photographic film cartridge and various photographing mechanisms, and an exterior body 4 wrapping the main body. The exterior body 4 is provided with a winding knob 5 of the unit body 3.
The outline is such that the shutter button 6, the strobe light emitting section 7, and the like are exposed. Further, a hole for exposing the photographing lens 8, the finder 9, the number-of-photographs display window 10 and the like is provided, and a photographing operation can be performed in a state where the unit body 3 is covered with the exterior body 4.

As shown in FIG. 3, the unit main body 3 includes a main body base 12, a rear cover 13, a photographing mechanism 14, a strobe device 15, and a front cover 16. On the front surface of the main body 12, a photographing mechanism 14, which is a unit formed by assembling a photographing lens 8, a shutter mechanism, a shutter charging mechanism locking mechanism and the like on a mechanical base 17, is attached. The rear cover 13 is assembled behind the main body base 12 to house the photographic film cartridge 18 between the main body base 12 in a light-tight manner.

The front cover 16 is attached to the front of the main body base 12. A shutter button 6 is provided on the upper surface of the front cover 16 so that a part of the shutter button 6 is cut out to be elastic. A pressing rod 19 is integrally provided below the shutter button 6.
9 presses the components of the photographing mechanism 14 to operate the shutter mechanism.

An exposure opening 31 is formed at the center of the main body base 12, and a photographing mechanism 14 is provided in front of the exposure opening 31.
Is attached. On both sides of the exposure opening 31, a cartridge chamber 21 for accommodating the cartridge body 20 of the photographic film cartridge 18 and a cartridge body 20 are provided.
A film roll chamber 23 for accommodating a film roll 22a formed by rolling the unexposed photographic film 22 drawn out of the photographic film 22 is integrally formed.

The bottom surfaces of the cartridge chamber 21 and the film roll chamber 23 are open surfaces, respectively. After the photographic film cartridge 18 is loaded, the bottom lids 28 and 29 are provided integrally with the rear cover 13 respectively. Will be blocked. Then, on the upper rear surface of the main body base 12,
The reverse rotation preventing claw 25 is formed integrally.

FIG. 4 is a perspective view showing only the strobe device of the exploded perspective view of FIG. The strobe board 31 has a main capacitor 32, a resistor 33, a transistor 34,
Components necessary for a known flash circuit, such as an oscillation coil 35, a strobe discharge tube 36, and a trigger coil 45, are attached by soldering and wired. Also, a charge completion lamp 37 that lights when the electric charge charged in the main capacitor 32 reaches a level at which the strobe light emitting tube can emit light, and a battery holder to which a dry battery 38 that supplies power to the strobe device 15 is attached. 39 and the like are provided.

Further, a synchro switch 41 is attached to an end of the flash substrate 31. The sync switch 41 is mechanically interlocked with the operation of the shutter blades, one contact piece 41a is pressed and bent downward, and the other contact piece 41b is brought into conduction so that the strobe can be operated simultaneously with the shutter operation. The discharge tube 36 emits light.

FIG. 1 is an external perspective view showing a trigger coil and a trigger contact piece, and FIG. 5 is an enlarged view of an engaging portion thereof. The trigger coil 45 includes a coil portion 45a.
And a lower terminal 45b and an output terminal 45c on the upper surface. The lower terminal 45b is soldered to a circuit pattern on the strobe board 31.

A trigger contact 46 is attached to the output terminal 45c. The trigger contact piece 46 is formed of an elastic metal plate, and has an engagement hole 46a at one end and a contact end 46b at the other end. The output terminal 45c of the trigger coil 45 penetrates into the engagement hole 46a of the trigger contact piece 46. On one side of this engagement hole 46a, a retaining plate 46c bent in the direction of penetration of the output terminal 45c is integrally formed, and is pressed against the output terminal 45c by elastic force, so that the output terminal 45c and the trigger contact piece 46c are pressed. And are electrically connected.

Since the retaining plate 46c is bent in the direction in which the output terminal 45c penetrates, the trigger contact 46
Does not come off from the trigger coil 45, and the trigger contact piece 46 can be securely attached to the trigger coil 45 without soldering. Further, as shown in FIG. 6, the contact end 46b of the trigger contact piece 46 comes into contact with the back surface of a metallic reflector 47 constituting the strobe light emitting section 7.

When such a trigger coil 45 is turned on, a current flows from a trigger capacitor (not shown) to the primary side of the coil section 45a when the synchro switch 41 is turned on. A high voltage current of kV is output. When a high-voltage current flows through the trigger contact piece 46 that is in contact with the output terminal 45c, the inside of the strobe discharge tube 36 is ionized and the electric resistance decreases, and the electric charge of the main capacitor 32 flows through the strobe discharge tube 36. Emit strobe light.

The operation of the above-structured flash unit for a film unit with a lens will be described. In the manufacture of the strobe device, first, a pattern image of the strobe substrate 21 is printed, and after the resist, it is selectively etched by an etchant to form a circuit pattern. Then, a resistor 23, a transistor 24,
Circuit components such as the coil 25 and the synchro switch 22 are placed and connected and fixed to a circuit pattern formed on a circuit board by batch automatic soldering by dip soldering.

Next, a strobe light emitting portion 7 having a strobe light emitting tube 36 and the like is mounted on an upper portion of the strobe substrate 21, and a main condenser 32 is further mounted. Then, the trigger contact piece 46 is attached to the output terminal 45c of the trigger coil 45. When the trigger contact piece 46 is attached, the output terminal 45c penetrates into the engagement hole 46a of the trigger contact piece 46 as shown in FIG.

As a result, the retaining plate 4 of the engaging hole 46a is formed.
6c is pressed into contact with the output terminal 45c by elasticity, so that the output terminal 45c and the trigger contact piece 46 become conductive. At the same time, the contact end 46b contacts the back surface of the reflector 47.
Further, since the retaining plate 46c is bent in the direction in which the output terminal 45c penetrates, the trigger contact piece 46 does not come off from the trigger coil 45.

As described above, the output terminal 45c of the trigger coil 45 and the trigger contact piece 46 are pressed and attached by the elasticity of the trigger contact piece 46, so that labor-intensive soldering becomes unnecessary, and the assembling process is speeded up. And cost reduction is achieved.

The shape of the retaining plate of the trigger contact piece is not limited to the above-described embodiment. For example, as shown in FIG. 7, the output terminal 45c of the trigger coil 45 may be surrounded from four sides. The retaining plates 51a to 51d may be bent in the penetration direction of 45c. In the case of this embodiment, the contact area between the output terminal 45c and the trigger contact piece 52 is increased, and more reliable conduction is enabled.

Further, if a notch into which a part of the retaining plate bites is provided at the tip of the output terminal, the pressure contact between the trigger coil and the trigger contact piece can be made more reliable.

[0025]

As described above, according to the present invention, a strobe discharge tube filled with gas, a trigger coil for generating a high voltage current for starting discharge in the strobe discharge tube, and the strobe discharge tube A trigger contact piece that contacts a tube and transmits a high-voltage current output from the trigger coil to the strobe discharge tube; and a strobe device for a film unit with a lens attached to a film unit with a lens, At one end, a bent plate bent in the direction of penetration of the secondary output terminal of the trigger coil is integrally provided, and the trigger contact piece and the output terminal are pressed against each other by the elasticity of the bent plate. By simplifying the process of attaching the trigger contact of the strobe device and reducing the assembly time, DOO reduction of, and reduce capital area required for the trigger contact piece mounting process together, it is possible to achieve effective use of manufacturing facilities.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a trigger coil and a trigger contact piece of a flash unit for a film unit with a lens embodying the present invention.

FIG. 2 is an external perspective view of a lens-fitted film unit incorporating a flash unit for a lens-fitted film unit embodying the present invention.

FIG. 3 is an exploded perspective view of FIG. 2;

FIG. 4 is an external perspective view of a flash unit for a film unit with a lens embodying the present invention.

FIG. 5 is an enlarged perspective view of a pressure contact portion between a trigger coil and a trigger contact piece.

FIG. 6 is a sectional view when FIG. 3 is viewed from the side.

FIG. 7 is a second embodiment of the present invention.

[Explanation of symbols]

 2 Film unit with lens 15 Strobe device 31 Strobe board 32 Synchro switch 45 Trigger coil 45c Output terminal 46 Trigger contact piece 46a Engagement hole 46c Retaining plate

Claims (1)

[Claims] 1. A strobe discharge tube filled with a gas, a trigger coil for generating a high voltage current for starting discharge in the strobe discharge tube, and an output from the trigger coil in contact with the strobe discharge tube. A trigger contact for transmitting a high-voltage current to the strobe discharge tube; and a strobe device for a film unit with a lens attached to the film unit with a lens.
A strobe device for a film unit with a lens, wherein a bent plate bent in a penetration direction of the secondary output terminal is integrally provided, and the trigger contact piece and the output terminal are pressed against each other by elasticity of the bent plate. .