JP2001042395A - Stroboscopic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stroboscopic device capable of attaining the miniaturization of the device, also, capable of preventing a leakage from a trigger coil, and also, attaining the good assemblage. SOLUTION: A flexible wiring board 30 is constituted by covering conductors 31 and 32 for supplying a power to both ends of a light emitting tube 10 stored in a housing 20, conductors 32 and 34 for supplying a power to an emission start-up trigger coil 35 and a conductor 33 for supplying the high voltage generated in the trigger coil 35 to the light emitting tube 10 with flexible insulating sheets 36A and 36B, and the trigger coil 35 is mounted on the flexible wiring board 30. Thus, the upper and side surfaces of the trigger coil 35 are easily surrounded by the coil storing part 22 of the housing 20.

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 incorporated in a camera.

[0002]

2. Description of the Related Art In a conventional strobe device, an arc tube and a trigger power are supplied by a wire. For this reason, it is necessary to use a thick wire material that satisfies the withstand voltage, which requires an unnecessary portion in terms of space, and also increases the number of assembly steps.

In order to improve this, the present applicant has proposed a strobe device described in Japanese Patent Application No. 10-17623.

FIG. 4 is an exploded perspective view of a strobe device described in Japanese Patent Application No. 10-17623.

The strobe device includes a light emitting section 3 having a light emitting tube 1 and a reflector 2, a housing 4 for accommodating the light emitting section 3, a strobe board 5, and a strobe board 5.
And a flexible wiring board 6 for connecting the light emitting unit 3 to the light emitting unit 3. In addition, 7 is a diffusion plate, and 8 is a trigger coil.

The flexible wiring board 6 is formed by integrally covering conductors 6A, 6B, and 6C made of a thin metal plate from two sides with flexible insulating sheets. One terminal A of the arc tube 1 is electrically connected to the + terminal 5A on the strobe substrate 5, and the conductor 6B is connected to the other terminal 1B of the arc tube 1 and the-terminal 5 on the strobe substrate 5.
B is electrically connected. One end of the conductor 6C is connected to the reflector 2 as a trigger electrode, and the other end is connected to the secondary electrode 8A of the trigger coil 8.

The housing 4 is integrally formed with a wall 4A surrounding the periphery of the trigger coil 8. This wall 4A is composed of a conductor 6C and a secondary electrode 8 of the trigger coil 8.
The top surface is open for soldering A to A. After the above-mentioned soldering is completed, a separate cap for closing the opening of the wall 4A is attached, or silicon is filled in the wall 4A so as to prevent discharge from the parts other than the trigger electrode.

[0008] By using the flexible wiring board 6 having the above-described structure, it is not necessary to route the wire, and the assembling property can be improved.

[0009]

However, since the trigger coil 8 is mounted on the strobe board 5,
To absorb the displacement between the trigger coil 8 and the wall 4A of the housing 4 fixed on the strobe board 5, and for soldering the conductor 6C to the secondary electrode 8A of the trigger coil 8, etc. The wall portion 4A is formed large enough to surround the trigger coil 8 with a margin, and as a result, there is a problem that miniaturization of the strobe device is hindered.

In addition, it is necessary to attach a separate cap to close the opening of the wall 4A or to fill the inside of the wall 4A with silicon, which causes a problem that the number of parts and the number of assembly steps are increased.

[0011] The present invention has been made in view of such circumstances, and it is possible to reduce the size of a strobe device and to prevent electric leakage from a trigger coil.
Another object of the present invention is to provide a strobe device having good assemblability.

[0012]

According to a first aspect of the present invention, there is provided a strobe device comprising: a conductor for supplying power to both ends of an arc tube accommodated in a housing; and a trigger for activating light emission. A flexible wiring board is formed by covering a conductor for supplying power to the coil and a conductor for supplying a high voltage generated by the trigger coil to the arc tube with a flexible insulating sheet. It is characterized in that the trigger coil is mounted on a plate.

By mounting the trigger coil on a flexible wiring board, the upper surface and side surfaces of the trigger coil can be easily surrounded by an insulating member, and the insulating member only needs to have a size enough to surround the trigger coil. For,
The size can be minimized, and the size of the device can be reduced. Also, the assemblability is not impaired.

[0014] The housing is characterized in that a coil accommodating portion surrounding an upper surface and side surfaces of the trigger coil is integrally formed as described in claim 2 of the present application. Thus, the edge surface distance between the trigger coil and the conductor around the trigger coil can be increased, and the number of components and the number of assembling steps for surely preventing leakage can be reduced.

The conductor is made of a metallic thin plate as described in claim 3 of the present application. As a result, it is possible to adapt to a flexible wiring board while ensuring the performance as a wire used in a strobe device.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view showing an embodiment of a strobe device according to the present invention.

This strobe device mainly comprises a light emitting section 14 having a rod-shaped light emitting tube 10 and a reflector 12, a housing 20 for accommodating the light emitting section 14, a flexible wiring board 30, and a strobe board 40. And is built into digital cameras.

The arc tube 10 has a xenon gas sealed in the tube, and emits light when a trigger signal is received. Terminals 10A and 10A are provided at both ends in the length direction of the arc tube 10.
B is protruded, and is connected to terminals 41 and 42 provided on the strobe substrate 40 by the flexible wiring board 30. The terminals 41 and 42 are respectively connected to positive and negative electrodes of a main capacitor (not shown).

The reflecting umbrella 12 has a reflecting surface formed on the inner wall surface and reflects forwardly the strobe light emitted from the arc tube 10, and has an opening through which the arc tube 10 is inserted. The arc tube is held through the The reflector 12 is formed by processing a metal plate, and is connected to the trigger electrode 33A of the flexible wiring board 30.

FIGS. 2 and 3 are a front view and a bottom view of the housing 20, respectively.

As shown in FIGS. 1 to 3, the housing 20 houses a housing 21 into which the reflector 12 holding the arc tube 10 is fitted, and a trigger coil 35 mounted on the flexible wiring board 30. Coil storage section 22
Terminal 31A, terminal 32 of flexible wiring board 30
A, and openings 23, 24, and 25 (see FIG. 3) through which the trigger electrode 33A is inserted, respectively, and the housing 20
Hooks 26, 2 for attaching the
7, the bosses 28 and 29 are integrally formed by a resin mold having an insulating property.

The flexible wiring board 30, on which the trigger coil 35 is mounted and which electrically connects the light emitting section 14 and the strobe board 40, is sandwiched between the housing 20 and the strobe board 40.

The flexible wiring board 30 includes conductors 31, 32, 33, and 34 each made of a thin metal plate.
It is configured to be integrally covered with two flexible insulating sheets 36A and 36B from the front and back. The terminal 31A of the conductor 31 and the terminal 32A of the conductor 32 are bent and raised so that the terminals 10A and 10B at both ends of the arc tube 10 are placed. The conductor 33 is bent at two right angles, and the trigger electrode 33A of the conductor 33 is bent in a curved shape so that it can elastically contact the side surface of the reflector 12.

A trigger coil 35 is mounted on the flexible wiring board 30. That is, one end of the primary coil of the trigger coil 35 is soldered to the terminal 34A of the conductor 34 that supplies power for starting light emission, and one end of the secondary coil is soldered to the terminal 33B of the conductor 33 having the trigger electrode 33A. The other ends of the primary coil and the secondary coil are soldered to the common conductor 32, respectively.

Next, a method of assembling the strobe device having the above configuration will be described.

First, the flexible wiring board 30 is mounted from the bottom side of the housing 20. Thereby, the terminals 31A, 32A, and the trigger electrode 33A of the flexible wiring board 30 are connected to the openings 23, 2
It is arranged at a predetermined position in the storage section 21 via 4 and 25. The trigger coil 35 mounted on the flexible wiring board 30 is housed in the coil housing part 22,
Thereby, the upper surface and the side surface of the trigger coil 35 are covered with the insulating member.

Subsequently, the reflector 12 holding the arc tube 10
Into the housing 21 of the housing 20. As a result, the terminals 10A and 10B at both ends of the arc tube 10 are mounted on the terminal 31A of the conductor 31 and the terminal 32A of the conductor 32, respectively, and the trigger electrode 33A is connected between the inner wall of the housing 21 and the reflector 12. It is sandwiched between and is electrically connected to the reflector 12. The four claws 21 </ b> A to 21 </ b> D provided at the entrance of the housing 21 of the housing 20 engage with the reflector 12 pressed into the housing 21 and hold the reflector 21 so as not to come off.

Next, the housing 20 is mounted on the strobe board 40. That is, as shown in FIGS. 2 and 3, the hooks 26 and 27 provided on the bottom surface of the housing 20 are engaged with the engagement portions 43 and 44 of the strobe board 40, respectively, and the bosses 28 and 29 are connected to the strobe board 40. Hole 4
5, Insert into 46.

Finally, terminals 10A at both ends of the arc tube 10 are provided.
10B and the terminals 31A and 32A of the conductors 31 and 32 of the flexible wiring board 30 are soldered, and the terminals 31 of the conductors 31, 32 and 34 of the flexible wiring board 30 are soldered.
B, 32B, 34B and terminals 4 on the strobe substrate 40
1, 42 and 47 are soldered.

[0031]

As described above, according to the present invention, since the trigger coil is mounted on the flexible wiring board,
The upper surface and the side surface of the trigger coil can be easily surrounded by the insulating member, and the leakage can be reliably prevented. In addition, since the insulating member only needs to have a size surrounding the trigger coil, it can be reduced to a minimum size, so that the device can be reduced in size and the assemblability is not impaired.

Further, the number of parts and the number of assembling steps can be reduced by integrally forming the coil housing surrounding the top and side surfaces of the trigger coil with the housing housing the light emitting unit.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a strobe device according to the present invention.

FIG. 2 is a front view of the housing shown in FIG. 1;

FIG. 3 is a bottom view of the housing shown in FIG. 1;

FIG. 4 is an exploded perspective view of a conventional strobe device.

[Description of Signs] 10 ... Emission tube, 10A, 10B, 31A, 31B, 32
A, 32B, 33B, 34A, 34B, 41, 42, 4
7 terminals, 12 reflectors, 14 light emitting units, 20 housings, 21 housing units, 22 coil housing units, 30 flexible wiring boards, 31, 32, 33, 34 conductors, 33
A: trigger electrode, 35: trigger coil, 36A, 3
6B: insulating sheet, 40: strobe board

Claims (3)

[Claims] 1. A conductor for supplying power to both ends of an arc tube housed in a housing, a conductor for supplying power to a trigger coil for activating light emission, and a high voltage generated by the trigger coil for applying light to the arc tube. A flexible wiring board formed by covering a conductor to be supplied to the flexible wiring board with a flexible insulating sheet, and the trigger coil is mounted on the flexible wiring board. 2. The strobe device according to claim 1, wherein said housing has a coil housing portion integrally surrounding said upper surface and side surfaces of said trigger coil. 3. The strobe device according to claim 1, wherein the conductor is formed of a thin metal plate.