JPH0810162Y2 - High voltage resistor pack - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention is a high-voltage resistor in which a high-voltage resistor such as a CRT (Cathode Ray Tube cathode ray tube) bleeder resistor is housed in an insulating case. Regarding the pack.

[Prior Art] Conventionally, as shown in FIG. 6, the bleeder resistor 1 provided in the high voltage resistor pack having a variable resistor for adjusting the focus voltage of the CRT is used to prevent cracks from the edge of the substrate. In order to prevent generation and discharge, the epoxy-based soft resin 2 is attached to the high-voltage resistor pack while being entirely covered. The soft resin 2 is formed by accommodating the bleeder resistor 1 in a Teflon mold 3 and pouring the soft resin 2 around it to cure it.

And, at the time of this molding, the bleeder resistor 1
A very high voltage is applied, and in particular, in order to surely cover the corners with the soft resin 2, the soft resin 2 is formed in a curved shape by bulging greatly at the corners of the bleeder resistor 1.

Further, as disclosed in Japanese Utility Model Laid-Open No. 2-72501, the bleeder resistance is temporarily stored in a bleeder resistance case, epoxy resin is injected and cured, and then the bleeder resistance is also stored in the high voltage block case. However, it is also proposed to inject and harden an epoxy resin in this high-voltage block case. Here, the resin injected into the bleeder resistance case is a relatively soft resin, and the resin injected into the high voltage block case has a high hardness.

[Problems to be Solved by the Invention] In the case of the conventional technique of covering with a soft resin, a Teflon mold 3 for providing the bleeder resistor 1 with the soft resin 2 is provided.
However, there is a problem in that the soft resin 2 formed by repeated use has dimensional variations. As a result, since the bleeder resistor 1 as a whole is covered by the slightly curved molding portion, the quality such as the insulating property varies, and it is very expensive, and the formwork is frequently costly. It is not possible to exchange 3 as well.

Further, in the case of the one disclosed in Japanese Utility Model Laid-Open No. 2-72501, there is no holding portion for holding the substrate inside the bleeder case, and the substrate contacts the ribs that are elongated and bulged along the inner peripheral surface of the bleeder case. It is only positioned in contact. Therefore, due to cracks in the bleeder case, the discharge easily leaks to the outside.

Further, no means for positioning the bleeder case at a predetermined position of the high-voltage block case is disclosed, and in particular, the bleeder resistance case is preferably attached at a predetermined distance from the inner peripheral surface of the high-voltage block case. If a mounting part for mounting and positioning is provided, air bubbles will tend to remain inside this mounting part when the inner case is later filled with insulating resin and hardened, and it will be used under extremely high voltage. There is a problem such as deterioration of pressure resistance.

The present invention has been made in view of the above-mentioned problems of the prior art, and is a high voltage resistor that has a simple structure, is resistant to current leakage even under high voltage, is safe, and can be supplied at a low cost. Intended to provide packs.

[Means for Solving the Problems] The present invention relates to a high-voltage resistor pack in which a high-voltage resistor is fixed in an accommodating portion of an insulative main body case and is filled with an insulating resin. An internal case provided separately from the main body case and a positioning part formed at a predetermined location on the outer surface of the internal case for fixing the internal case in the storage part are provided, and the internal case is provided in the storage part. A mounting portion for mounting the positioning portion when the inner case is mounted is provided in the storage portion, and even when the positioning portion is mounted on the mounting portion, the cutout portion that exposes a part of the positioning portion is provided. The high-voltage resistor is installed in the mounting part, the high-voltage resistor is housed in the inner case, the positioning part is fixed to the mounting part, and an insulating resin is filled in the housing part. It is a high voltage resistance pack characterized by:

Further, the present invention is a high voltage resistance pack in which the positioning portion and the mounting portion are formed asymmetrically.

[Operation] The high-voltage resistor pack of the present invention is installed in the housing of the main body case with the high-voltage resistor housed in the inner case to facilitate the installation work, eliminate bubbles during resin filling, and prevent electric discharge. This is something that can be surely prevented.

Further, the high voltage resistance pack of the present invention is designed so that it cannot be mounted when the inner case is mounted in the opposite direction.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 5, the high voltage resistance pack 10 of this embodiment is a so-called focus pack for adjusting the focus voltage and screen voltage of the CRT, and is made of noryl resin or polybutylene terephthalate (PBT). A variable resistor (not shown) or the like is housed in a body case 11 made of an insulating resin such as, and an opening side of the body case 11 is sealed by injecting an insulating resin 15 such as an epoxy resin.

Further, the main body case 11 is formed with an accommodating portion 12 accommodating a high voltage resistor 14 which is a bleeder resistance of the focus circuit. This high-voltage resistor 14 has a resistor (not shown) formed on the surface of the substrate from the high voltage side to the low voltage side, and is an internal case provided separately from the main body case 11.
It is housed in 16 and is housed in the housing part 12 together with this inner case.

The inner case 16 has an opening on one side surface of the box body, and a pair of holding portions 17 for holding the high-voltage resistor 14 are integrally formed therein. Holding part 17
Is provided so as to project toward the opening from the bottom portion on the side opposite to the opening, and the holding portion 17 is provided so as to project slightly apart from the inner peripheral surface of the inner case 16 to form the high-voltage resistor 14. keeping. A groove 18 is formed in the holding portion 17 to form a high voltage resistor.
It is designed to guide 14 to store and hold.

Further, as shown in FIGS. 3 and 4, the outer bottom surface of the inner case 16 is provided with positioning portions 22 and 23 fitted into the mounting portions 20 and 21 projecting from the housing portion 12 of the main body case 11. It is formed integrally. The positioning portions 22 and 23 are attached to the mounting portion 20,
Corresponding to the shape of 21, the width directions thereof are provided in a positional relationship of being rotated 90 degrees from each other. And the mounting parts 20, 21
Has slit-shaped notches 24 and 25, and is provided so as to sandwich the positioning portions 22 and 23 of the inner case 16, and the notches 24 and 25 are rotated 90 degrees in a positional relationship. ing. Further, the positioning portion 23 and the corresponding mounting portion 21 are formed at positions relatively close to the low voltage side 14b of the high voltage resistor 14 while avoiding the high voltage side 14a in order to prevent external discharge.

The inner case 16 accommodates the high-voltage resistor 14 therein, and further surrounds the high-voltage resistor 14 so that a soft resin 26 having a Sure D hardness of 70 or less such as epoxy resin is a space of the inner case 16. Is filled in the part, and inside the inner case 16,
The high voltage resistor 14 is ensured to be held and insulated.

Inside the housing portion 12 of the main body case 11, the inner case 16 housing the high voltage resistor 14 is provided with the mounting portions 20, 21 as described above.
The positioning parts 22 and 23 are fitted and attached to the
As shown in FIG. 5, the other inner case 27 also has an engaging piece 30.
Is inserted into an engaging recess 31 provided on the side wall of the storage portion 12 and attached. And, the space part in this storage part 12 is
Sure D when the flyback transformer was installed later
An insulating resin such as a hard epoxy resin having a hardness of 78 to 92 is filled, and the inner case 12 is completely sealed.

In the high-voltage resistor pack of this embodiment, the high-voltage resistor 14 to which a high voltage is applied is housed in the inner case 16, and the inner case 16 is attached to the housing portion 12 of the main body case 11, so that the installation work is easy. In addition, due to the double structure, discharge due to cracks generated in the insulating resin does not easily occur, and the high-voltage resistor 14 is reliably protected. In addition, at the time of mounting, since the mounting portions 20 and 21 of the storage portion 12 and the positioning portions 22 and 23 of the inner case 16 are asymmetrical to each other, the inner case 16 is securely fixed without making a mistake in the mounting direction. . Moreover, the notches 24, 24
No. 25 is formed, and the filling resin from the flyback transformer surely enters the mounting portions 20 and 21 through the notches 24 and 25, and no bubbles remain inside the mounting portions 20 and 21. .

The inner case of the present invention may be any one as long as it holds the high-voltage resistor in its storage space, and its mounting method and shape can be appropriately set.
As shown in the figure, the positioning portion 32 is integrally molded on the side surface of the low-pressure side 16b of the inner case 16, and is attached to the inner wall of the storage portion 12.
34 may be formed. Further, the shapes of the positioning portion and the mounting portion can be set as appropriate, and each one may be formed asymmetrically.

In addition, a high-voltage resistor can be applied to various types, and its shape and use are not limited.

[Effect of the Invention] The high-voltage resistance pack of the present invention has a double structure of the insulating case, and therefore has a high withstand voltage, and even if a crack or the like is formed in either case, there is a risk of current leakage. Insulation is surely secured. Further, since the inner case has a positioning portion and is fixed to the mounting portion inside the housing portion by this positioning portion, the inner case is mounted at a distance from the inner wall of the housing portion, and the internal discharge can be surely prevented.

Further, even when the positioning portion is attached, the mounting portion has a cutout portion through which the positioning portion is exposed, and no bubbles remain in the mounting portion when the insulating resin is injected.

Further, since the positioning portion and the mounting portion are formed asymmetrically, the mounting direction is not erroneous, the mounting work is easy and reliable, and the reliability of the component can be extremely increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing an inner case of a high voltage resistor according to an embodiment of the present invention, FIG. 2 is a plan view showing a state in which the high voltage resistor is housed in the inner case of this embodiment, and FIG. A cross-sectional view of the high-voltage resistance pack of this embodiment taken along a plane including the surface of the high-voltage resistor, FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3, and FIG. 5 is a plan view of the high-voltage resistance pack of this embodiment. FIG. 6 is a perspective view of a prior art high voltage resistor. 10 …… High voltage resistance pack, 11 …… Main body case, 12 …… Storage section, 14 …… High voltage resistor.

Claims (2)

[Scope of utility model registration request] 1. A high-voltage resistor pack comprising a high-voltage resistor fixed in an accommodating portion of an insulative main body case and filled with an insulating resin, wherein the high-voltage resistor is accommodated separately from the main body case. An internal case provided and a positioning portion formed at a predetermined location on the outer surface of the internal case for fixing the internal case in the storage section are provided, and the positioning is performed when the internal case is mounted in the storage section. Even if the positioning section is attached to this mounting section, the mounting section where the section is installed is provided in this storage section.
A notch portion exposing a part of the positioning portion is provided in the mounting portion, the high voltage resistor is stored in the inner case, the positioning portion is fixed to the mounting portion, and insulation is provided in the storage portion. A high-voltage resistor pack characterized by being filled with resin. 2. The positioning part is formed in an asymmetrical shape or positional relationship on the outer peripheral surface of the inner case, and the mounting part is asymmetrically provided in the accommodating part corresponding to the asymmetrical positioning part. Claim 1 characterized by the above.
High voltage resistance pack as described.