JP4562863B2 - Electroflash device with built-in printed circuit board - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electro flash device incorporating a printed circuit board such as a flexible printed circuit board or a hard printed circuit board, and more particularly to an electro flash device capable of efficiently checking the function of the electro flash.
[0002]
[Prior art]
Conventionally, when mounting a printed circuit board inside the case of an electroflash device, a display component and an operation component are mounted at a position facing the display window of the rear case, and a circuit component such as a CPU is mounted on the opposite side, A digital signal check terminal for checking the function of the electroflash was provided. Further, mechanical parts such as a battery chamber are arranged on the printed circuit board.
[0003]
In addition, when connecting the boards, a lead wire or a flexible printed board was used, and when performing a function check after completion of assembly and a function check at the time of repair, the case was disassembled and the battery compartment was removed.
[0004]
FIG. 3 is an explanatory diagram of a conventional electroflash apparatus.
[0005]
As shown in the figure, in the electroflash, the outer casing is constituted by a front case 40 and a rear case 41 that cannot be disassembled integrally with the display window, and a reflector 42 is disposed on the upper case, and the discharge tube 43 is held horizontally inside. An opening for irradiating an electroflash flash is formed in front of the reflector 42, and a light emitting window 44 made of a transparent material is attached to the opening. A main capacitor 45 for accumulating flash electric charges is disposed behind the reflector 42. A battery chamber 46 is provided below the main capacitor 45.
[0006]
A circuit board 50 on which components such as a CPU 47, a transformer 48, and a thyristor 49 are mounted is disposed in front of the battery chamber 46. An LED 51 for displaying information such as the electroflash light emission mode on the rear part of the battery chamber 46, an operation button 52 for setting such information, for example, setting of mode, zoom, test, etc. as function selection, are mounted. A substrate 53 having check terminals for checking the function of the electroflash is provided, and various information can be confirmed through the display window 56.
[0007]
Moreover, a lead wire or a flexible printed circuit board has been used for connection between the substrates.
[0008]
[Problems to be solved by the invention]
As described above, the check terminal is provided on the surface opposite to the display window inside the case, and the mechanical parts such as the battery chamber are arranged on the substrate. In the circuit check at the time of circuit check and repair, it is necessary to disassemble the case and to remove parts such as the battery case, and the work efficiency tends to decrease.
[0009]
Further, in the conventional method of connecting between substrates by a lead wire or a flexible printed circuit board, the lead wire or the flexible printed circuit board is sandwiched between parts such as a battery case at the time of disassembling and reassembling at the time of circuit check, or There was a case where it was cut by being drawn.
[0010]
[Means for Solving the Problems]
[0011]
An electroflash device embodying the present invention has a display panel including a display window, and circuit components such as a converter circuit and a CPU circuit are mounted on a first surface of a printed circuit board built in the electroflash device. A display component is mounted on a second surface different from the first surface, and a signal check terminal for checking the function of the electroflash device is provided, and the printed circuit board is connected to the display panel. The display panel is configured so as to be detachable, and the signal check terminal is disposed in a region on the second surface that is exposed when the display panel is attached or detached.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention facilitates the circuit check of the analog part and the digital part of the electroflash circuit by only attaching and detaching the display panel with the above-described configuration, and further, the circuit board is connected during the circuit check and during the reassembly after the check. The present invention provides an electroflash including a printed circuit board having a feature that it is possible to prevent disconnection of a lead wire.
[0013]
【Example】
FIG. 1 is a sectional view showing an electroflash to which the present invention is applied, and FIG. 2 is an exploded perspective view of the electroflash.
[0014]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0015]
The electroflash device includes a front case 24 and a rear case 25. A flash light emitting unit including a discharge tube 12 and a reflector 13 therein, and an AF auxiliary light unit including an AF auxiliary light emitting unit 17 and a lens 16. , The battery chamber 19, and a main body portion including a circuit portion such as the main CPU 20.
[0016]
The discharge tube 12 of the flash light emitting part emits flash light, and is disposed horizontally near the central part inside the reflector 13 and irradiates the subject through the light emitting window 11 by light emission. The reflector 13 is linked to the zoom and moves back and forth with the discharge tube 12 by the operation of the motor 14.
[0017]
On the other hand, an opening for AF auxiliary light is formed on the front surface of the main body, and a light emitting window 15 made of a red transparent material is attached to the opening. A lens 16 for converging auxiliary light and an AF auxiliary light emitting unit 17 are disposed behind the light emitting window 15 inside the main body. A main capacitor 18 for storing electric charges for flashing is disposed at the upper part of the main body, and a battery chamber 19 is provided below the main capacitor 18.
[0018]
A control circuit board 23 on which a high voltage circuit section of a converter circuit made up of electronic components such as a main CPU 20 and a transformer 21 for performing various controls of electroflash is mounted at the rear of the battery chamber 19.
[0019]
An LED 27 for displaying the electroflash emission mode is mounted on the control circuit board 23 at a position facing the display window 26 of the rear plate 22. The rear plate 22 has a display window 26 and is detachably incorporated in the rear case 25. The light emission mode can be confirmed through the display window 26. The mode setting and the like are performed by operating an operation button 28 disposed below the rear case 25.
[0020]
The control circuit board 23 has a digital signal check terminal CH10, 11, 12 for checking the function of the electroflash and an analog signal check on the surface facing the rear plate 22 detachably incorporated in the rear case 25. Terminals CH20, 21, 22 are arranged. A rear plate 22 is incorporated in the rear case 25, and the analog signal check terminals CH20, 21, 22 and digital signal check terminals CH10, 11, 12 can be exposed by removing the rear plate.
[0021]
The analog signal check terminal CH10 is a terminal for confirming the operation of the high-voltage circuit unit that boosts the power supply voltage using the transformer 21 and supplies it to the main capacitor 18.
By checking this analog signal check terminal CH10, it is confirmed whether the main capacitor 18 has enough charge to generate the specified light amount, and whether the high-voltage circuit unit is functioning normally.
[0022]
The digital signal check terminal CH20 is a terminal for checking input / output signals of the main CPU 20. By checking the signal of the main CPU 20 at the digital signal check terminal CH20, when various functions of the electroflash function normally or when the operation is incomplete, which part on the control circuit board 23 is abnormal. It is possible to confirm which part has the cause of the defect, and it is possible to specify the repair location when repairing.
[0023]
【The invention's effect】
According to the present invention, in the printed circuit board built in the main body of the electroflash, the printed circuit board in which the check terminal for function check is arranged in the region exposed by the attachment and detachment of the rear plate is incorporated into the electroflash, so that the case as in the conventional case. An initial function check and a function check at the time of repair can be performed without disassembling the main body.
[0024]
Further, since the conventional disassembling work is omitted, there is an effect that the working efficiency is improved, and further, disconnection of the lead wire at the time of disassembling and assembling can be prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an electroflash to which the present invention is applied.
FIG. 2 is an exploded perspective view of an electroflash to which the present invention is applied.
FIG. 3 is a cross-sectional view of a conventional electroflash device.
[Explanation of symbols]
20 Main CPU
21 Transformer 22 Rear plate 23 Control circuit board 24 Front case 25 Rear case 26 Display window 27 LED
28 Operation buttons CH10, 11, 12 Digital signal check terminal CH20, 21, 22 Analog signal check terminal

Claims (2)

In an electroflash device having a display panel including a display window,
A circuit component such as a converter circuit or a CPU circuit is mounted on the first surface of a printed circuit board built in the electroflash device.
Mounting a display component on a second surface different from the first surface of the printed circuit board, and providing a signal check terminal for checking the function of the electroflash device;
Said printed circuit board, and arranged such that the second surface against the display panel and positive, with composing the display panel detachably, said signal checking terminal, on the second surface, the display panel electro flash device incorporating a printed circuit board, characterized in that <br/> arranged in a region exposed by desorption. 2. The electroflash device with a built-in printed circuit board according to claim 1, wherein the signal check terminals are a digital signal check terminal for performing a function diagnosis check and an analog signal check terminal for performing a condition diagnosis of the high-voltage circuit unit.

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