JP4157207B2 - Strobe device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a strobe device.
[0002]
[Prior art]
The strobe device has been conventionally used in, for example, a camera or the like, and mainly includes an arc tube, a trigger coil for causing the arc tube to emit light, and a reflector provided corresponding to the arc tube.
[0003]
On the other hand, cameras equipped with a high-power zoom lens have become widespread, and a strobe device built in such a camera has a plurality of zoom lenses in order to cope with different angles of view on the wide side and the tele side of the zoom. There is an arc tube and a plurality of reflectors corresponding to the arc tube.
[0004]
By the way, when arranging a plurality of arc tubes and reflectors in a limited space of the camera, it is necessary to arrange the reflectors and the reflectors and the trigger coils as close as possible in order to save space. is there.
[0005]
However, when a plurality of reflectors are brought close to each other, when a light emission trigger voltage is applied to one of the plurality of light-emitting tubes so as to emit light, the other is caused by capacitive coupling between the plurality of reflectors. An induced voltage is generated in the reflector and the other arc tube may emit light erroneously.
[0006]
Various improvements regarding such a strobe device have been proposed. For example, Japanese Patent Laid-Open No. 9-5842 discloses a method for lowering the induced voltage by inserting a flexible printed board between two reflectors. Further, although a problem of non-light emission due to trigger leakage has been pointed out, Japanese Patent Laid-Open No. 9-61895 discloses that trigger leakage is prevented by a flexible printed circuit board electrically connected to a xenon tube as a light emitting tube. ing.
[0007]
[Problems to be solved by the invention]
However, in the above-mentioned Japanese Patent Application Laid-Open No. 9-5842, attention is paid only to the generation of an induced voltage between two reflectors, and there is a problem of erroneous light emission due to an induced voltage between trigger coils or between a trigger coil and reflectors. Is not considered. Further, the shield member is formed as a separate body, and no light emission due to trigger leakage is described.
[0008]
In Japanese Patent Laid-Open No. 9-61895, when the trigger coil is disposed near the arc tube, no light is emitted due to trigger leakage between the trigger coil and the reflector or the arc tube, trigger coils, reflectors, triggers, It does not describe the erroneous light emission due to the induced voltage between the coil and the reflector.
[0009]
The present invention has been made paying attention to such a problem, and the object of the present invention is to achieve a compact strobe device that prevents erroneous light emission due to induced voltage and non-light emission due to trigger leakage without increasing the number of parts. Is to provide.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, in the strobe device in which at least two arc tubes and at least two trigger means for emitting light from the at least two arc tubes are spaced apart from each other in the housing, the at least two arc tubes are provided. A flexible printed circuit board having a ground pattern formed on almost the entire surface is electrically connected to the trigger means, and the flexible printed circuit board is disposed between the at least two arc tubes in the housing. , And arranged between the at least two trigger means and the at least two arc tube and the at least two trigger means so as to be shielded.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0014]
This embodiment is a strobe device having a plurality of (here, two) arc tubes (here, Xe tubes), between two trigger coils (trigger means), between a trigger coil and a reflector, and between two reflectors. Is shielded by a single flexible printed circuit board (hereinafter simply referred to as “flexible”) that has a wiring pattern to the trigger coil and is electrically connected to the trigger coil. The strobe device as a whole can be reduced in size by reducing the distance between the trigger coil and the reflector as much as possible while preventing erroneous light emission due to induced voltage and non-light emission due to trigger leakage without increasing
[0015]
FIG. 1 is a schematic view of a camera to which a strobe device according to the present invention is applied. As shown in FIGS. 1A and 1B, the strobe device 100 is provided in the upper part of the camera, and the figure shows a state in which the strobe device including the T-side reflector 15 and the W-side reflector 16 is popped up. Yes.
[0016]
FIG. 2 is a development view of the flex 12 used in the strobe device. The base portion 12-5 is provided with a GND (ground) pattern (copper pattern) 12-1 to the trigger coil, and contact portions 12-2 and 12-3 connected to the terminals of the trigger coil and a strobe circuit. And a contact portion 12-4 to which the lead wire is connected. Except for the contact parts 12-2, 12-3, and 12-4, they are covered with a coverlay.
[0017]
3 and 4 show the configuration of the strobe device according to this embodiment, and FIG. 3 is an exploded perspective view showing a state in which each element of the strobe device is disassembled.
[0018]
In FIG. 3, the T-side trigger coil 11 has terminals 11A and 11B provided at the contact portion 12-3, which is a portion extending from the base portion 12-5 provided with the GND pattern 12-1 of the flex 12. By being inserted into the openings 12A and 12B, they are arranged at predetermined positions on the flexible printed circuit 12. Further, the W-side trigger coil 13 has its terminals 13A and 13B inserted into the openings 12C and 12D provided in the contact portion 12-2 that is a portion extending from the base portion 12-5 of the flex 12. It is arranged at a predetermined position on the flex 12. The flex 12 to which the T-side trigger coil 11 and the W-side trigger coil 13 are attached is disposed on the cradle 10.
[0019]
A xenon (Xe) tube 19 having a conductive coating on the surface is inserted into a T-side reflector 15 made of aluminum through openings 21A and 21B of a rubber band 21, and a T-side trigger coil is provided on the side surface thereof. The lead wire connected to the eleventh electrode 11C is soldered. Lead wires 50A and 50B are connected to both ends of the xenon (Xe) tube 19, respectively. Similarly, a xenon (Xe) tube 20 having a conductive coating on the surface is inserted into the W-side reflector 16 made of aluminum through the openings 22A and 22B of the rubber band 22, and on the side surface thereof on the W side. A lead wire connected to the electrode 13C of the trigger coil 13 is soldered. The rubber bands 21, 22 may have different shapes. Lead wires 51A and 51B are connected to both ends of the xenon (Xe) tube 20, respectively.
[0020]
The T-side reflector 15 in which the xenon (Xe) tube 19 is inserted and the W-side reflector 16 in which the xenon (Xe) tube 20 is inserted are made of an acrylic transparent member, and light rays from the xenon tubes 19 and 20 are transmitted. It is attached to the window part 17 which has a part to pass.
[0021]
FIG. 4 is a cross-sectional view showing a state in which each element of the strobe device is assembled. The same elements as those described in FIG. 3 are denoted by the same reference numerals.
[0022]
In FIG. 4, a housing having a space necessary for housing each element of the strobe device is formed by the exterior portion 14, the cradle 10, the window portion 17, and the decorative plate 18. The cradle 10 has a protrusion that extends into the internal space of the housing, and the tip of the cradle 10 is divided into two to form the protrusions 10A and 10B. Moreover, the window part 17 has the projection part 17A extended in the internal space of a housing | casing. The flex 12 is arranged so as to be bent substantially along the surface shape over the entire surface of one of the protruding portions having the protruding portions 10A and 10B of the cradle 10 and the protruding portion 17A of the window portion 17. After extending until it touches, it is folded in the direction of the exterior part 14 and extended until it almost reaches the inner wall of the exterior part 14.
[0023]
Due to the shape of the cradle 10 and the window portion 17 and the arrangement of the flex 12, the internal space of the housing has a T-side trigger coil 11, a W-side trigger coil 13, a T-side reflecting umbrella 15, a W-side reflecting umbrella 16, and W It is separated into four spaces for arranging each of the side reflecting umbrellas 16.
[0024]
For example, the T-side trigger coil 11 is accommodated in a first space defined by the inner wall of the exterior portion 14 and the cradle 10 including the protruding portion 10A. The W-side trigger coil 13 is housed in a second space defined by the inner wall of the exterior portion 14, the protrusions 10 </ b> A and 10 </ b> B, and the flexible cable 12. Further, the T-side reflector 15 into which the xenon (Xe) tube 19 is inserted is defined by the inner wall of the window portion 17 and the protruding portion 17A, the inner wall of the cradle 10 and the protruding portion including the protruding portion 10B, and the flex 12. It is stored in the third space. The W-side reflector 16 with the xenon (Xe) tube 20 inserted therein is housed in a fourth space defined by the inner wall of the window portion 17 and the protruding portion 17A, the inner wall of the exterior portion 14, and the flex 12. Yes.
[0025]
With the above-described configuration, one flexible cable is provided between the trigger coils (here, the space between the T-side trigger coil 11 and the W-side trigger coil 13) and between the trigger coil and the reflector (here, T Between the side trigger coil 11 and the W side trigger coil 13, and the T side reflector 15 and the W side reflector 16), and between the reflectors (here, the T side reflector 15 and the W side reflector 16). Thus, it is possible to provide a compact strobe device that prevents erroneous light emission due to induced voltage and non-light emission due to trigger leakage without increasing the number of components. .
[0026]
The specific embodiments described above include the following inventions.
[0027]
(1) In a strobe device having at least two arc tubes and a reflecting umbrella provided corresponding to each of the arc tubes,
At least two trigger means for emitting light from the arc tube;
A printed circuit board electrically connected to the trigger means;
Comprising
The printed circuit board is configured to be disposed in a space between the trigger unit and the trigger unit, a space between the trigger unit and the reflector, and a space between the reflector and the reflector.
[0028]
(2) In (1), the printed circuit board is a single flexible printed circuit board.
[0029]
(3) In (1) or (2), the printed circuit board is grounded.
[0030]
(4) In a camera having a strobe device,
At least two arc tubes that generate flash when a voltage is applied;
At least two trigger means for emitting light from the arc tube;
A printed circuit board electrically connected to the trigger means;
Comprising
The printed circuit board is arranged in a space between the trigger means and the trigger means.
[0031]
(5) In a camera having a strobe device,
An arc tube that generates a flash when a voltage is applied;
A reflector that reflects the flash from the arc tube;
Trigger means for emitting light from the arc tube;
A printed circuit board electrically connected to the trigger means;
Comprising
The printed circuit board is arranged in a space between the trigger means and the reflector.
[0032]
According to (1) to (5), it is possible to provide a small strobe device that prevents erroneous light emission due to induced voltage and non-light emission due to trigger leakage without increasing the number of components.
[0033]
【The invention's effect】
According to the first, second, or third aspect of the invention, it is possible to provide a small-sized strobe device that prevents erroneous light emission due to induced voltage and non-light emission due to trigger leakage without increasing the number of parts.
[Brief description of the drawings]
FIG. 1 is a schematic view of a camera to which a strobe device according to the present invention is applied.
FIG. 2 is a development view of a flex used in the strobe device.
FIG. 3 is an exploded perspective view showing a state in which each element of the strobe device is disassembled.
4 is a cross-sectional view showing a state in which each element of the strobe device shown in FIG. 3 is assembled.
[Explanation of symbols]
10 ... cradle,
11 ... T side trigger coil,
12 ... Flexible printed circuit board (flexible),
13 ... W side trigger coil,
15 ... T side reflector,
16 ... W side reflector,
17 ... window,
18 ...
19, 20 ... xenon (Xe) tube,
21, 22 ... Rubber bands.

Claims (1)

In a strobe device in which at least two arc tubes and at least two trigger means for causing the at least two arc tubes to emit light are arranged in the housing at a distance from each other,
The at least two trigger means are electrically connected to a flexible printed circuit board on which a ground pattern is formed over almost the entire surface , and the flexible printed circuit board is connected to the at least two arc tubes inside the casing. and between the and between each other at least two trigger means, wherein that are arranged in at least two arc tube and between the at least two trigger means, was bent so as to shield form, and this Features a strobe device.

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