JPS5838640Y2 - dense technology - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic component storage device used in a high voltage generating circuit for obtaining high voltage to be supplied to a cathode ray tube of a television receiver, for example.

Generally, in color television receivers, etc., a high voltage of 10 to 25 KV is required as the anode voltage of the cathode ray tube.As a means of supplying this voltage, a retrace pulse voltage boosted by a flyback transformer is used as shown in Figure 1. The voltage is applied to a voltage doubler rectifier circuit, and the required high DC voltage is obtained as its output.

Note that the voltage doubler rectifier circuit may be used as a double, triple, or quintuple voltage rectifier circuit as required.

This voltage doubler rectifier circuit is composed of a plurality of semiconductor rectifiers 11 and capacitors 12 7, and a resistor 13 is a bleeder resistor for dividing the anode voltage and extracting the focus voltage.

As shown in FIG. 2, this bleeder resistor uses a plate-shaped resistor in which resistor elements are formed on a substrate.

Since such rectifier circuits are used under high voltage, it is certain that corona discharge is likely to occur between the terminals of each component element itself, between adjacent component elements, or between each component element and a low potential point such as the chassis. being admired.

Therefore, in order to insulate the rectifier circuit, each component element (second
(shown in the figure) and then filled with anti-corona agent to obtain an integrated high-pressure rectifier.

However, simply placing it in a case and covering it with filler as described above does not provide sufficient insulation; in reality, the distance between the side and bottom surfaces of the case, the distance between each component element, and the state of the filler coating is insufficient. It will be difficult to prevent the outbreak of coronavirus unless we fully consider the following.

However, in conventional devices, the structure of the high-voltage output section has been considered as shown in Figure 3, but it has not been possible to obtain a sufficient corona generation ratio effect, especially between the output section and low potential points such as the chassis. Ta.

The insulating case 15 shown in FIG.
The cut arrow portion 17 is formed by cutting the side wall into a U-shape, for example.

A U-shaped rubber bushing 18 that is slightly larger than the notch 17 is prepared.

The notch 17 is formed on the U-shaped side surface of the rubber bush 18.
A groove 181 is formed in the rubber bushing 18 to allow the lead wire 19 to pass through the side surface of the rubber bushing 18.

Therefore, the cross-sectional configuration of the high voltage output section of the rectifier after manufacturing is as shown in the figure.

According to the structure of the high voltage output section described above, the U-shaped structure 181
Since the filler 20 is made of a single layer, the filler leaks from the contact area between the rubber bushing 18 and the notch 17, especially from the location shown by the broken line arrow in the figure, before the filler 20 is filled and hardened.

This means that although the filler has good adhesion to the material of the generally used insulating case 15, the rubber bushing 18
The fact that the material does not have as good adhesion as the case is also thought to be a factor in the leakage of the filler.

Also, when filling the filler 20, the pressure of the filler at the point indicated by the arrow above is changed because the filler is filled while performing vacuum degassing to remove air bubbles from the filler, which may also be a cause of leakage. I can think.

Furthermore, according to the structure of the high voltage output section described above, the rubber bush 1
When an external force is applied to the rubber bushing 18 through the lead wire 19, the rubber bushing 18 is damaged by the leakage of the filler from the case 15.
It has the disadvantage that it is easy to break away from it.

The present invention has been made in view of the above points, and aims to provide an electronic component storage device that can prevent filler leakage, eliminate causes of corona discharge, and improve reliability. It is.

An embodiment of the present invention will be described in detail below with reference to FIGS. 4 and 5.

That is, in FIG. 4a, 21 is an insulator that houses a voltage doubler rectifier circuit (for example, the circuit as explained in FIG. 1) of a television receiver, and is filled with an anti-corona agent as a means to prevent corona generation. This is a sexual case.

This insulating case 21 is made of synthetic resin (premix) into a box shape, and has supporting protrusions and terminals integrated inside to facilitate the installation and connection of semiconductor rectifiers, capacitors, resistors, etc. Molded.

The output end of the circuit made up of the high-voltage electronic components is naturally led out to the outside of the insulating case 21 via a lead wire. It is considered to be a composition.

That is, a double notch 23 is provided in the side wall 21□ of the insulating case 21.

In other words, this double notch 23 has a shape in which a series of grooves 24 are formed along the thick side of the U-shaped notch (the side of the member thickness n).

(Fig. 4b) Then, high-voltage electronic components such as semiconductor rectifiers, capacitors, and resistors are arranged inside the insulating case 21, and a circuit as shown in Fig. 1 is connected, for example. The high voltage output end thereof is led out of the case through the high voltage output section 22 via a lead wire.

In this case, the lead wire holder 26, which closes the high voltage output section and leads the output lead wire 25 of the circuit to the outside, is formed into a shape as shown in FIG.

That is, this lead wire holder 26 is molded, for example, from silicone rubber, and its side end surface 26
□ is formed in a shape that matches the notch 23 and the groove 24 formed in series along the notch surface.

Therefore, this holder 26 has a U-shaped groove along its side end surface 261.

Further, the lead wire holder 26 has a through hole 2 in its flat part.
6□ is formed, and a cylindrical protrusion 2 extending the through hole 262 is formed on the surface facing the outside of the insulating case 21.
63 is integrally molded.

Furthermore, this lead wire holder 26 is connected to the insulating case 2.
A linear notch groove 264 is formed on a surface corresponding to the inner side of 1.

Furthermore, one end of the through hole 262 facing inside the case is formed to have a larger diameter than the other portion, and a cylindrical piece 28 serving as a plug is fitted therein.

This piece 28 is made of a thermosetting resin such as premix, which is the same material as the insulating case 21, and has a cylindrical axis that allows the lead wire 25 to pass through.
It has a through hole 28□ which is slightly smaller than the diameter of the 50 wire.

A flange portion 282 is integrally molded at one end of the cylinder.

Furthermore, the outer diameter of the cylindrical portion of the piece 28 is the same as that of the lead wire holder 26.
It can be inserted into a through hole 26 provided in the through hole 26, and is formed to have a slightly larger diameter than the through hole 26°.

That is, the lead wire holder 2 is made of silicone rubber, which is a soft material.
By inserting a piece 28 made of a hard thermosetting resin into the piece 6, the adhesion between the holder 26 and the piece 28 is improved.
This improves the adhesion between the piece 28 and the lead wire 25 by inserting them.

Conventionally, a soft lead wire holder 26 and a hard material filler 2 were used.
7 are just adjacent to each other, and if the soft material holder 26 is deformed by external force, the soft material and the hard material will not fit well, and a gap will occur in the adjacent portion, resulting in poor adhesion to each other.

However, as mentioned above, due to the presence of the piece 28, the holding body 2
6. The piece 28 and the lead wire 25 have improved adhesion to each other, and since the piece 28 and the filler 27 are made of hard materials and do not deform, they are always in close contact with each other.

Therefore, the holding body 26, the piece 28, the lead wire 25, and the filler 21 are in close contact with each other.

Therefore, when the lead wire holder 26 is fitted into the notch 23 of the insulating case 21 and the piece 28 is fitted into the lead wire holder 26, the structure shown in FIG. 5 is obtained.

That is, the groove 24 of the notch 23 has a protrusion 263.
The side collar piece 26 is fitted.

Then, the piece 28 is attached to the through hole of the holder 260 from inside the case so as to be plugged.

According to the electronic component storage device 2 of the present invention configured as described above, when filling the corona preventive agent 27 made of epoxy resin or the like, the shape of the notch surface of the notch portion 23 and the contact surface of the lead wire holder 26 is the same as that of the conventional one. Since it is more complicated than that, leakage of filler is eliminated.

Furthermore, the creepage distance from the live parts inside the insulating case to the outside of the case (distance shown by arrow A in Figure 5) is twice as long as previously thought, which helps prevent corona discharge. It becomes extremely effective.

Furthermore, since the structure of the cutout groove of the insulating case 21 is formed in a double structure, even if an external force is applied to the lead wire holder 26, the adhesion to the notch 23 is strong and the contact surface between the holder and the cutout is strong. A gap will not easily form between the two.

Furthermore, in the present invention, since the notch groove 264 is provided on the surface of the lead wire holder 26 corresponding to the inside of the case, when the filler is filled, the filler enters the notch and improves the fixing effect of the lead wire holder. , the contact surface between the filler and the holder, that is, the creepage distance, can be increased, which is effective in preventing corona discharge.

Furthermore, since the notch 23 is formed in a double structure, it also reinforces the wall of the insulating case 21, thereby preventing damage when attaching the lead wire or the lead wire holder.

Furthermore, since the piece 28 is provided as a feature of the present invention, when filling and curing the thermosetting filler 21, the lead wire 25 or the protrusion 263 is Even if an external force is applied in the direction, displacement between the lead wire and the holder 26 is less likely to occur, and the adhesion between the lead wire 25, the filler 27, the lead wire holder 26, etc. is improved.

In particular, the piece 28 is extremely effective against the force applied to the lead wire 25 in the direction of the arrow C in the figure, thereby preventing breakage of the lead wire even after manufacture, thereby improving the reliability of the finished product.

Furthermore, as shown by arrow A9B in the figure, the creepage distance between the live parts inside the case and the outer surface of the case is larger than that of the conventional case, which is effective in preventing corona discharge.

As a result, the entire case can be made smaller and materials can be saved.

Furthermore, the lead wire holder 26 has good adhesion to the outer skin of the lead wire 25, but the case 21 does not have good adhesion to the filler 27. By using the piece 28 with good adhesion to the lead wire 27, leakage of the filler between the lead wire 25 and the through hole 26° is effectively prevented.

In addition, when implementing the present invention, the configuration of the double structure notch 23 shown in FIG. , I
t' may be varied as necessary, and in this case, it is preferable to appropriately select the width m of the collar 26.0 corresponding to the inside of the case of the lead wire holder 26.

Further, the thickness of the collar 265 of the lead wire holder 26 is appropriately selected for the groove width n of the notch 23.

As described above, according to the present invention, it is possible to prevent filler from leaking from the high-pressure output part when filling the insulating case with filler, and eliminate various causes of corona generation that occur due to filler leakage. It is possible to provide an electronic component storage device that achieves the above-mentioned characteristics.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an example of a circuit used under high voltage, Fig. 2 is a perspective view showing the external appearance of the parts shown in Fig. 1, and Fig. 3 a, b.
4A is a perspective view and a cross-sectional view showing the configuration of a conventional high voltage output section, FIG. FIG. 5 is a sectional view and a perspective view showing the main part of the device of the present invention after manufacturing. 21...Insulating case, 22...High voltage output section, 23...Notch, 24...Groove, 25...Lead wire , 26... Lead wire holder, 27... Filler, 28...
piece.

Claims (1)

[Scope of utility model registration request] An electronic component in which an electronic component is installed inside a box-shaped insulating case, a required output end of this component is led out of the case via a lead wire, and the case is filled with an insulating filler. In the storage device, a notch provided in the side wall of the case, a groove provided in a series along the notch surface of the notch, and a side end surface formed into a shape that closely fits the notch and the groove, and a flat part. a lead wire holder having elasticity and having a through hole inserted into the inside and outside of the case, and a generally cylindrical shape having a thicker outer periphery fitted in the through hole in the case, and through which the lead wire passes. An electronic component storage device comprising a piece.