JP2001337374A - Electronic flash device incorporating printed circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an electronic flash capable of performing functional check in the initial stage and functional check in the case of repairing without disassembling a case main body. SOLUTION: A rear plate 22 is provided with a display window 26, and attachably/detachably assembled in a rear case 25. A light emitting mode is confirmed through the window 26. A mode is set by operating an operation button 28. Digital signal check terminals CH10, CH11 and CH12 and analog signal check terminals CH20, CH21 and CH22 for checking the function of the electronic flash are arranged on the surface of a control circuit board 23 facing to the plate 22 attachably/detachably incorporated in the case 25. By detaching the plate 22 assembled in the case 25, the terminals CH20, CH21 and CH22 and the terminals CH10, CH11 and CH12 are exposed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electroflash device incorporating a printed circuit board such as a flexible printed circuit board or a hard printed circuit board, and more particularly to an electroflash device capable of efficiently checking the function of an electroflash. is there.

[0002]

2. Description of the Related Art Conventionally, when a printed circuit board is mounted inside a case of an electroflash device, a display component and an operation component are mounted at a position directly facing a display window of a rear case, and circuit components such as a CPU are mounted on the opposite surface. And a digital signal check terminal for checking the function of the electroflash. In addition, a mechanical component such as a battery chamber is arranged on the printed circuit board.

In addition, when conducting a function check after completion of assembly and a function check at the time of repair, a lead wire or a flexible printed circuit board is used for connection between the boards, a case is disassembled, and a battery compartment is removed. .

FIG. 3 is an explanatory view of a conventional electroflash device.

[0005] As shown in the figure, the electroflash is
The outer casing is composed of a front case 40 and a rear case 41 which is integral with the display window and cannot be disassembled, and a reflective umbrella 42 is disposed on an upper portion thereof, and a discharge tube 43 is horizontally held inside. I have. An opening for irradiating the flash of the electroflash is formed in front of the reflector 42, and a light emitting window 44 made of a transparent material is attached to this opening. Behind the reflector 42, a main condenser 45 for storing the electric charge of the flash is provided. A battery chamber 46 is provided below the main capacitor 45.

The CPU 47 is located in front of the battery chamber 46.
And a circuit board 50 on which components such as a transformer 48 and a thyristor 49 are mounted. An LED 51 for displaying information such as the light emission mode of the electroflash at the rear portion of the battery chamber 46, and operation buttons 52 for setting the information, for example, setting the mode, zoom, test, etc. as a function selection are mounted. A substrate 53 on which a check terminal for checking the function of the electroflash is arranged is provided, and various information can be confirmed through a display window 56.

[0007] Lead wires or flexible printed circuit boards have been used for connection between the substrates.

[0008]

As described above, conventionally, a check terminal is provided on the surface inside the case opposite to the display window, and furthermore, since the mechanical parts such as the battery chamber are arranged on the substrate, the electro-flash is not provided. In the circuit check at the time of operation check after completion of the assembly and the circuit check at the time of repair, it is necessary to disassemble the case and remove parts such as the battery case, so that the working efficiency tends to decrease.

Further, in the conventional method of connecting the substrates by a lead wire or a flexible printed board, the lead wire or the flexible printed board is connected to parts such as a battery case at the time of disassembly and reassembly at the time of circuit check. In some cases, it was cut by being pinched or pulled.

[0010]

[Means for Solving the Problems]

The present invention relates to an electroflash having a flexible or rigid printed circuit board,
The flexible or rigid print has a check terminal for checking an analog circuit and a digital circuit, and the check terminal is disposed on a surface directly facing a display window of a rear case of the electroflash. It is characterized by.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention facilitates the circuit check of the analog and digital parts of an electroflash circuit by only attaching and detaching a display panel by the above-mentioned structure, and furthermore, when performing a circuit check and reassembling after the check. The present invention provides an electroflash having a built-in printed circuit board having a feature that it is possible to prevent breakage of a lead wire connecting between the boards.

[0013]

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.

An embodiment of the present invention will be described below with reference to FIGS.

The electro-flash device comprises a front case 24 and a rear case 25, inside thereof a flash light emitting portion comprising a discharge tube 12 and a reflector 13, and an AF comprising an AF auxiliary light emitting portion 17 and a lens 16. It is composed of an auxiliary light unit, a battery compartment 19, and a main unit including a circuit unit such as the main CPU 20.

The discharge tube 12 of the flash light emitting section emits flash light, is disposed horizontally near the central portion inside the reflector 13, and irradiates the subject through the light emission window 11 by light emission.
The reflector 13 moves back and forth with the discharge tube 12 by the operation of the motor 14 in conjunction with the zoom.

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 transmissive material is attached to this opening. A lens 16 for converging the auxiliary light and an AF auxiliary light emitting unit 17 are arranged behind the light emitting window 15 inside the main body. A main capacitor 18 for storing electric charge for flashing is disposed in an upper portion of the main body, and a battery chamber 19 is provided below the main capacitor 18.

A control circuit board 23 on which a high-voltage circuit section of a converter circuit including electronic components such as a main CPU 20 and a transformer 21 for performing various controls of the electroflash is mounted behind the battery chamber 19 is provided. I have.

The control circuit board 23 uses the rear plate 22
The LED 27 for displaying the light emission mode of the electroflash is mounted at a position directly opposite to the display window 26 of FIG. 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.

The control circuit board 23 has a digital signal check terminal CH10, 11, 1 for checking the function of the electroflash on a surface facing the rear plate 22 which is removably incorporated in the rear case 25.
2 and analog signal check terminals CH20, 21 and 22 are arranged. A rear plate 22 is incorporated in the rear case 25. By removing the rear plate, the analog signal check terminal CH2
0, 21, 22, digital signal check terminals CH10,
11 and 12 can be exposed.

The analog signal check terminal CH 10 is a terminal for confirming the operation of the high voltage circuit section which boosts the power supply voltage using the transformer 21 and supplies the boosted power supply voltage to the main capacitor 18. By checking the analog signal check terminal CH10, it is checked whether or not the electric charge enough to generate the specified light amount is stored in the main capacitor 18, and it is checked whether or not the high-voltage circuit is functioning normally.

The digital signal check terminal CH
Reference numeral 20 denotes a terminal for confirming input / output signals of the main CPU 20. By confirming the signal of the main CPU 20 at the digital signal check terminal CH20, if any of the functions of the electroflash is functioning normally or the operation is incomplete, which part on the control circuit board 23 is abnormal. It is possible to confirm which part is causing the failure, and to specify the repair location when performing repair.

[0023]

According to the present invention, a conventional printed circuit board in which a check terminal for function check is arranged on a surface directly opposite to a rear case is incorporated into an electroflash. Thus, the initial function check and the function check at the time of repair can be performed without disassembling the case body.

The elimination of the conventional disassembly work has the effect of improving work efficiency.
Disconnection of the lead wire during disassembly and assembly can also be prevented.

[Brief description of the drawings]

FIG. 1 is a 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 section of a conventional electroflash device.

[Explanation of symbols]

 Reference Signs List 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 button CH10, 11, 12 Digital signal check terminal CH20, 21, 22 Analog signal check terminal

Claims (2)

[Claims] 1. An electroflash device having a display panel including a display window, wherein a circuit component such as a converter circuit and a CPU circuit is mounted on a first surface of a printed circuit board incorporated in the electroflash device, and A display component is mounted on the surface, a signal check terminal for further checking the function of the electro-flash device is provided, the second surface is arranged on the display panel side, and the display panel is detachably configured. An electroflash device with a built-in printed circuit board. 2. The 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 state diagnosis of a high voltage circuit unit. Electroflash device.