JPH06120056A - High tension block device - Google Patents

Abstract

PURPOSE:To obtain a high tension block device relaxed in discharge gap operating noise and enhanced in insulating properties. CONSTITUTION:A primary step-up transformer 13, a secondary step-up transformer 14, a printed board 11 equipped with a discharge gap 16 are mounted on a terminal board 10, the terminal board 10 is housed in a case 7, and urethane resin is poured into the case 7 to mold the assembly concerned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a high pressure block device which is a lighting device for a metal halide lamp used in a liquid crystal projector or the like.

[0002]

2. Description of the Related Art Conventionally, a high pressure block device is constructed as shown in FIG. In the figure, 1 is a printed circuit board, 2
Is a primary step-up transformer, 3 is a secondary step-up transformer, 4 is a capacitor, 5 is a high-voltage rectifying diode, and 6 is a discharge gap.

[0003]

Since the conventional high-voltage block device has a structure in which each component is mounted on the printed circuit board 1 as described above, problems such as electric discharge easily occur.
There is a problem in terms of insulation and a problem that the operation noise of the discharge gap 6 is large.

[0004]

In order to solve the above-mentioned problems, according to the present invention, a primary step-up transformer, a secondary step-up transformer, a printed board, and a terminal board on which the step-up transformer and the printed board are mounted. And a discharge gap mounted on the printed circuit board, wherein the terminal board is housed in a case and then molded with a resin, wherein the resin is a urethane resin. It is intended to provide a block device.

[0005]

By molding the urethane resin, the operating noise of the discharge gap is mitigated and the insulation of the high voltage block device is improved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, FIG. 1 shows the appearance of a high-voltage block device. In the figure, 7 is a case, 8 is a high voltage side output terminal, and 9 is a low voltage side output terminal.

Next, FIG. 2 shows a state before the high pressure block device is housed in the case 7. In the figure, 10 is a terminal board, 11 is a printed circuit board mounted on the terminal board 10, 12 is a capacitor mounted on the printed circuit board 11, and 13 is a primary step-up transformer mounted on the terminal board 10. , 14 are secondary step-up transformers also mounted on the terminal board 10.

Further, FIG. 3 shows a state viewed from the bottom side of the high-voltage block device, and FIG. 4 shows a cross-sectional side view of a main part of the high-voltage block device. In both figures, 15 is a high-voltage rectifier diode mounted on the printed circuit board 11, and 16 is a discharge gap also mounted on the printed circuit board 11.

FIG. 5 is a circuit block diagram of the high voltage block device. The same parts as those described above are designated by the same reference numerals.

The high voltage block device of the present invention comprises a printed circuit board 11 on which electronic components are mounted and a primary step-up transformer 13.
Terminal board 1 on which the secondary booster transformer 14 is mounted
After 0 is stored in the case 7, a urethane resin is poured into the case for molding. Therefore, the operating noise of the discharge gap 16 is alleviated and it is difficult for the discharge gap 16 to leak to the outside, and the insulation of the high-voltage block device is improved.

[0011]

As described above in detail, according to the present invention, 1
The terminal board is provided with a secondary booster transformer, a secondary booster transformer, a printed board, a terminal board on which the booster transformer and the printed board are mounted, and a discharge gap mounted on the printed board. In the high voltage block which is housed inside and is molded with resin, the resin is made of urethane resin, so that the operation noise of the discharge gap is alleviated and the insulation of the high voltage block device is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of a high pressure block device according to the present invention.

FIG. 2 is a perspective view showing a state before being housed in a case in the high-voltage block device of the present invention.

FIG. 3 is a bottom view of the high pressure block device of the present invention.

FIG. 4 is a side sectional view of a main part of a high pressure block device according to the present invention.

FIG. 5 is a circuit block diagram of a high voltage block device according to the present invention.

FIG. 6 is an external perspective view showing the configuration of a conventional high pressure block device.

[Explanation of symbols]

 7 Case 8 High-voltage side output terminal 9 Low-voltage side output terminal 10 Terminal board 11 Printed circuit board 12 Capacitor 13 1 Step-up transformer 14 2 Step-up transformer 15 High-voltage rectifier diode 16 Discharge gap

[Procedure amendment]

[Submission date] January 21, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

Further, FIG. 3 shows a state as viewed from the upper surface side of the high-voltage block device (FIG. 3 shows the state of the inside of the case 7 excluding the top surface portion), and FIG. 4 shows the high-voltage block device. The cross section of the main part is shown. In both figures, 15 is a high-voltage rectifier diode mounted on the printed circuit board 11,
6 is a discharge gap also mounted on the printed circuit board 11.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

FIG. 3 is a plan view of a main part of a high-voltage block device according to the present invention.

Claims (1)

[Claims] 1. A primary boosting transformer, a secondary boosting transformer, a printed board, a terminal board on which the boosting transformers and the printed board are mounted, and a discharge gap mounted on the printed board. A high-voltage block device in which the terminal board is housed in a case and then molded with a resin, wherein the resin is a urethane resin.