JP3286650B2 - High voltage electronic components and high voltage variable resistors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-voltage electronic component, and more particularly to a high-voltage variable resistor called a focus pack.

[0002]

2. Description of the Related Art In a high-voltage electronic component, a linear terminal member is often used for an input terminal or an output terminal.
The linear terminal member is generally called a piano wire or the like, and is formed of a metal wire having a rigidity that can be bent but is not easily deformed. FIG. 7A is a perspective view of a conventional high-voltage variable resistor, which is a kind of high-voltage electronic component, as viewed from the back side. In FIG. 1, reference numeral 101 denotes an insulating case made of an insulating resin having an open end. In the insulating case 101, a resistance circuit pattern is formed on the surface, and a space is formed between the inner wall surface and the surface of the insulating case 101 in which a slider that slides on the resistor circuit pattern is formed. The insulating substrate is housed therein, and the opening 101a of the insulating case 101 is filled with an insulating resin to form an insulating resin layer 102 on the back surface of the insulating substrate. An input terminal 103, a focus output terminal 104, a screen output terminal 105, and a ground terminal 106 are arranged on the back side of the insulating substrate such that a part thereof is buried in the insulating resin layer 102. Each terminal extends through the insulating substrate in the thickness direction to the surface side of the insulating substrate, and its end is connected by soldering to an electrode of a resistance circuit pattern formed on the surface of the insulating substrate. The input terminal 103 is connected to a high-voltage lead wire extending from the flyback transformer side, and the focus output terminal 104 is connected to a pin terminal (not shown) inserted from a cylindrical portion 101b provided on the insulating case 101, and a screen output. An output lead wire is connected to the terminal 105. Terminal 103-105
Is formed by punching a metal plate into a predetermined shape and then performing a bending process. The ground terminal 106 is constituted by a linear terminal member 107, and an end extending from the insulating resin layer 102 has a terminal holding member 108 provided on a flat plate portion 101 c constituting a part of a peripheral portion of an opening 101 a of the insulating case 101. Is held in. Conventional terminal holding member 10
8 is a pair of projecting pieces 108 projecting from the flat plate portion 101c.
a and 108b. Conventionally, FIG.
As shown in (B), a pair of projecting pieces 108a and 108
After fitting the ends of the linear terminal member 107 between the positions b, the ends of the pair of projecting pieces 108a and 108b are crushed by welding to hold the ends of the linear terminal member 107. However, the welding operation is troublesome. Therefore, as a structure for holding the end of the linear terminal member 7 without welding,
The structure of the terminal holding member shown in FIGS. 7C and 7D has been proposed.

The terminal holding member 109 has concave portions 109a1 and 109b1 at the center of the opposing surfaces of the pair of projecting pieces 109a and 109b, respectively.
The distance between the opposing surfaces except for 1 and 109b1 is smaller than the diameter of the linear terminal member 107. When holding the end of the linear terminal member 107, FIG.
As shown in (D), the end of the linear terminal member 107 is pressed into the slit between the pair of projecting pieces 109a and 109b,
While pressing and expanding the space between the pair of projecting pieces 109a and 109b, the end of the linear terminal member 107 is
Insert up to 9b1. When the ends of the linear terminal member 107 are fitted into the recesses 109a1 and 109b1, the pair of protruding pieces 109a and 109b that have been expanded return to their original state. Thus, the end of the linear terminal member 107 can be held without using a welding technique.

[0004]

However, in such a terminal holding member 109, when an excessive force is applied to the end of the linear terminal member 107, the end of the linear terminal member 107 comes out of the terminal holding member 109. There is a problem.

An object of the present invention is to provide a high-voltage electronic component that can solve the problems of conventional high-voltage electronic components and high-voltage variable resistors.

Another object of the present invention is to provide a high-voltage electronic component in which the linear terminal member can be easily attached and the linear terminal member does not come off from the terminal holding member.

Still another object of the present invention is to provide a high-voltage electronic component capable of fixing a linear terminal member to a terminal holding member using an insulating resin forming an insulating resin layer at an end of the linear terminal member. And a high-voltage variable resistor.

Another object of the present invention is to provide a high-voltage electronic component in which an insulating resin forming an insulating resin layer does not excessively adhere to the end of the linear terminal member at the end of the linear terminal member. An object of the present invention is to provide a high-voltage variable resistor.

[0009]

SUMMARY OF THE INVENTION An electronic component for high voltage to be improved by the present invention comprises an insulating case made of an insulating resin having an insulating substrate housing portion having one end opened, and a circuit pattern formed on the surface. An insulating substrate housed in the insulating substrate housing so that the inner wall surface of the insulating case faces the surface, an insulating resin layer formed by filling an insulating resin from an opening of the insulating substrate housing, A terminal holding member provided in the insulating case adjacent to the opening of the substrate housing portion, one end of which penetrates the insulating substrate and is connected by soldering to the electrode portion of the circuit pattern and the other end of which is the terminal holding member , And a linear terminal member held therein.

In the present invention, a portion of the linear terminal member between one end and the other end and continuous with the other end extends along the side wall of the insulating case surrounding the periphery of the insulating substrate housing portion. Mold as follows. Further, the terminal holding member is composed of a first holding portion and a second holding portion which are arranged in a direction away from the insulating substrate housing portion and are arranged at intervals. The first holding unit and the second holding unit are provided with a holding structure that opens in the opening direction in which the insulating substrate housing unit opens and receives the other end of the linear terminal member. Further, the first holding portion is arranged so as to form a gap between the end surface portion on the insulating substrate housing portion side and the portion of the linear terminal member, where the insulating resin rises by capillary action.

In another aspect of the present invention, the end face of the first holding portion and the inner wall of the side wall of the insulating case are provided on the portion facing the portion of the linear terminal member in the opening direction side of the first holding portion. Is formed to extend continuously to the end face of the substrate.

In another aspect of the present invention, the holding structure of the first holding portion is formed of a fitting recess formed on the end face on the opening direction side and fitted with the linear terminal member. Then, the groove is made continuous with the fitting recess.

[0013] In still another aspect of the present invention, the holding structure of the second holding portion is arranged at an interval capable of sandwiching the linear terminal member, and has an engaging portion that engages with the linear terminal member. It consists of a pair of engagement pieces.

In the invention of the high-voltage variable resistor of the present application,
An extended portion that is continuous with one end of the linear terminal member and extends along the back surface of the insulating substrate; and an extension portion that is located between the extended portion and the other end and rises from the back surface side of the insulating substrate, and A rising portion extending along a surrounding side wall. And the 1st and 2nd holding parts which comprise a terminal holding member are fixed to the plate-shaped part of the insulating case provided adjacent to the insulating substrate accommodation part. Other points are the same as those of the high-voltage electronic component of the present application.

[0015]

After the other end of the linear terminal member is held by the holding structure of the first holding portion and the second holding portion constituting the terminal holding member, the insulating resin is filled through the opening of the insulating case. . A part of the insulating resin goes up in a gap formed between the end face of the first holding part on the side of the insulating substrate housing part and a part of the linear terminal member by capillary action. Since there is a gap between the first holding part and the second holding part, the insulating resin that moves by the capillary action is not provided between the first holding part and the second holding part.
Stop moving to and from the holding unit. Therefore, it is possible to prevent the insulating resin from adhering to the other end of the linear terminal member more than necessary. When the insulating resin is cured and the insulating resin layer is formed, the other end of the linear terminal member can be securely fixed to the first holding portion. In addition, the holding structure of the first holding portion and the second holding portion is a structure that opens in the opening direction in which the insulating substrate housing portion opens and receives the other end of the linear terminal member. The other end of the terminal member can be easily held by the first and second holding portions.

When a groove is formed in a portion of the end face of the first holding portion and the inner wall of the side wall of the insulating case facing a portion of the linear terminal member, the insulating resin is first retained along the linear terminal member. It is possible to surely ascend to the end face on the opening direction side of the portion.

Further, the holding structure of the first holding portion has a structure in which a fitting concave portion in which the linear terminal member is fitted is formed in the end face on the opening direction side, and the above-mentioned groove is continuous with the fitting concave portion. ,
The insulating resin can be reliably transferred to the inside of the fitting recess, and the linear terminal member can be more reliably fixed to the first holding portion.

The holding structure of the second holding portion may be constituted by a pair of engaging pieces which are arranged at intervals so as to sandwich the linear terminal member and have an engaging portion which engages with the linear terminal member. Simplifies the insertion of the other end of the linear terminal member into the second holding portion, and simplifies the positioning and temporary fixing of the other end of the linear terminal member when forming the insulating resin layer. Can be done.

In a high-voltage variable resistor, when combined with a flyback transformer or the like, an excessive force is easily applied to the linear terminal member, and the movement of the terminal member causes an insulation distance between the conductive member and another conductive portion. As a result, the occurrence of a discharge accident is likely to occur. According to the present invention, the occurrence of such an accident can be prevented.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1A to 1D are a bottom view, a plan view, a side view, and a front view of an embodiment in which the present invention is applied to a high-voltage variable resistor that is one of high-voltage electronic components. FIG.
Is a bottom view of the insulating case. This high-voltage variable resistor is mounted on the transformer case so as to close the variable resistor mounting opening of the transformer case of the flyback transformer. After the mounting, the insulating resin for transformer molding is filled into the inside of the transformer case and the opening on the back side of the high-voltage variable resistor from the insulating resin filling opening end of the transformer case. The insulating case 1 made of an insulating resin such as a noril resin or PBT has an open end shape having an opening on the bottom side. The interior of the insulating case 1 is divided by a partition wall portion 2 into a substrate storage room 3 forming a first storage room or an insulating substrate storage portion and an accessory component storage room 4 forming a second storage room. Around the opening of the insulating case 1, there is provided a fitting wall 5 extending continuously except for one side located on the side of the insulating resin filling opening of the transformer case when attached to the transformer case. ing. A flat plate portion 6 extending in the longitudinal direction is integrally formed on one side of the opening of the insulating case 1 located on the side of the insulating resin filling opening end of the transformer case.

The fitting wall 5 is composed of first and third wall portions 5a and 5c located on both sides of the flat plate portion 6 and a second wall portion 5b located on the side facing the flat plate portion 6. Be composed. Outside the second wall portion 5b, there is provided a reinforcing engagement projection 7 protruding outward from the outer wall surface. The reinforcing engaging projection 7 engages with a reinforcing engaging concave portion formed on an upright wall portion that forms a fitting groove portion provided around the variable resistor mounting opening portion of the transformer case, One end of the insulating case 1 is prevented from rising when the insulating resin is filled in the transformer case.

A terminal holding member 8, a spare holding member 9, and a lead wire holding member 10 are integrally formed on the back side of the flat plate portion 6. Each of the holding members 8 to 10 has a holding structure capable of holding the linear terminal member 11 or the like with a predetermined force by press-fitting the linear terminal member 11 or a lead wire (not shown) from the back surface side. The structure of the terminal members 8 to 10 will be described later in detail. The spare holding member 9 is used for holding a lead wire of a capacitor, or for holding a linear terminal member which is added when another ground terminal or the like is required. Lead wire holding member 10
Are used to hold lead wires of a capacitor (not shown). The spare holding member 9 may not be used depending on the circuit configuration.

The C-shaped through-holes 12 and 13 into which two high-voltage leads covered with insulation are fitted are formed in the flat plate portion 6. Of the two high-voltage leads, a high-voltage lead (not shown) for screen output is connected to the terminal fitting 14 and is drawn out to the front side of the flat plate 6 through the through hole 13. A high-voltage lead wire (not shown) for the focus output is connected to the terminal fitting 15 and is drawn out to the front surface side of the flat plate portion 6 through the through hole 12. The terminal fittings 14 and 15 have a structure that can hold the core wire without soldering only by inserting the core wire of the high-voltage lead wire. The two high-voltage leads drawn out to the front surface side of the flat plate portion 6 are bent along the surface of the flat plate portion 6 and between the outer wall of the insulating case and the holding pieces 16a and 16b provided on the flat plate portion 6. Press-fit. The terminal fitting 17 constitutes an input terminal to the variable resistor section. Linear terminal member 11 and terminal fittings 14, 15, and 1
7 is fixed to an insulating substrate 18 (see FIG. 3C) arranged on a rib 1b (FIG. 2) formed in the substrate storage chamber 3. On the surface of the insulating substrate 18, a resistor pattern or a circuit pattern including a variable resistor for focusing and a variable resistor for screen is formed. The circuit of the resistor pattern is the circuit indicated by the symbol RCP in the circuit diagram of the high-voltage variable resistor of the present embodiment shown in FIG.
In the circuit of FIG. 4, the terminal 11 and the terminal fittings 14, 1
Parts corresponding to 5 and 17 are denoted by the same reference numerals.
The capacitor C shown in FIG. 4 is not shown in FIG.

The bottom wall 1a (FIG. 2) of the insulating case 1 surrounding the substrate storage chamber 3 facing the opening and the insulating substrate 1
A focusing rotor and a screen rotor having sliding contacts that come into contact with the resistor pattern are respectively housed between them and the surface of the resistor 8. On the back side of the insulating substrate 18, a soft epoxy resin is filled for insulation reinforcement and protection of the insulating substrate, and an insulating resin layer 19 is formed.

As shown in FIG. 3C, the linear terminal member 1
Reference numeral 1 denotes an end 11a that penetrates the insulating substrate 18 and is connected by soldering to the electrode portion (ground electrode portion) of the resistor pattern, and extends along the back surface of the insulating substrate 18 so as to be continuous with the end 11a. The extension portion 11b and the rising portion 1 which is continuous with the extension portion 11b and rises from the back surface side of the insulating substrate 18 and extends along the side wall 1c surrounding the periphery of the insulating substrate housing portion 3.
1 c and an end 11 d held by the terminal holding portion 8. Such a shape can be formed by bending a conductor such as a piano wire.

The terminal holding member 8 includes a first holding portion 81 and a second holding portion fixed to the plate portion 6 so as to be spaced from each other in a direction away from the substrate storage chamber 3 constituting the insulating substrate storage portion. The first holding portion 81 and the second holding portion 82 are opened toward a direction in which the substrate storage chamber 3 opens (hereinafter, referred to as an opening direction), and the other of the linear terminal members 11 is formed. Each has a retaining structure for receiving an end.
As shown in FIGS. 3A to 3C, the first holding portion 81
Are arranged such that the flat surface of the end surface portion 81 a on the substrate storage chamber 3 side is flush with the inner wall surface of the side wall 1 c surrounding the substrate storage chamber 3. End face portion 81a and side wall 1c of first holding portion 81
A groove 81c is formed in a portion of the inner wall portion facing the rising portion 11c of the linear terminal member 11 so as to extend continuously to the end face portion 81b on the opening direction side of the first holding portion 81.
Although FIG. 3C shows that the rising portion 11c of the linear terminal member 11 is fitted into the groove 81c, the groove portion 81c and the portion 11 of the linear terminal member 11 are actually used.
A gap is formed between c and c by which the insulating resin rises by capillary action. End face 8 of first holding portion 81 on the opening direction side
A fitting recess 81d into which the end 11d of the linear terminal member 11 is fitted is formed in 1b, and the above-mentioned groove 81c and the fitting recess 81d are continuous. The groove 81c and the fitting recess 81d each have a semicircular cross-sectional shape,
The holding structure of the first holding portion 81, that is, a structure that opens toward the opening direction and receives the end 11d of the linear terminal member 11 is configured. When filling the substrate storage chamber 3 with a thermosetting insulating resin such as an epoxy resin to form the insulating resin layer 19, the gap between the rising portion 11c of the linear terminal member 11 and the groove 81c is insulated by a capillary phenomenon. The resin rises, and the insulating resin that has risen to the end face portion 81b moves in the fitting recess 81d. A gap 83 is formed between the first holding section 81 and the second holding section 82, and this gap prevents the insulating resin that has entered the fitting recess 81d from moving further by capillary action. Is done. As described above, the linear terminal member 11 is firmly fixed to the first holding portion 81 by the insulating resin that has entered the groove 81c and the fitting concave portion 81d.

The second holding portion 82 is constituted by a pair of engaging pieces 82a and 82b which are arranged at a distance g1 between which the end 11d of the linear terminal member 11 can be sandwiched. The distance g1 is the end 1 of the linear terminal member 11.
It is set to be equal to or smaller than the diameter of 1d. Also, the linear terminal member 11 is provided at the distal end portions of the pair of engagement pieces 82a and 82b.
The engagement portions 82c and 82d that engage with the end 11d of the first member are integrally provided. The distance g2 between the engaging portions 82c and 82d is set smaller than the distance g1.
The holding structure of the second holding portion 82 is constituted by a pair of engaging pieces 82a and 82b. First holding portion 81a
In addition, if the second holding portion 82b is provided, it is a matter of course that the holding strength of the linear terminal member 11 can be increased. Before filling, it functions to position and temporarily fix the end 11d of the linear terminal member 11. Further, as in the present embodiment, when the second holding portion 82 is constituted by a pair of engagement pieces 82a and 82b arranged at an interval, the corner portion 81d1 of the fitting concave portion 81d provided in the first holding portion 81 is formed. Since the end 11d of the linear terminal member 11 can be bent using the fulcrum as a fulcrum, there is an advantage that the shape of the end of the linear terminal member can be easily corrected.

Like the terminal holding member 8, the spare holding member 9 is also composed of a first holding portion 91 and a second holding portion 92 which are arranged at an interval. As shown in FIG. 3D, the first holding portion 91 is an end surface portion 91 on the substrate storage chamber 3 side.
The flat surface a is arranged so as to be lower than the inner wall surface of the side wall 1b surrounding the substrate storage chamber 3 by the dimension d1. The dimension d1 is set to a dimension capable of forming a predetermined gap capable of generating a capillary phenomenon between the linear terminal member and a rising portion thereof when another linear terminal member is held. It goes without saying that the end holding portion 81a of the first holding portion may be lowered without forming the groove 81c in the terminal holding member 8 described above. A pair of holding pieces 91b, 91b are protruded from an end surface of the first holding portion 91 on the opening direction side. Tapered portions 91c, 91c extending toward the opening direction are formed at the tips of the holding pieces 91b, 91b. Note that, like the engaging pieces 82a and 82b of the second holding portion 82 of the terminal holding member 8, these holding pieces 91b,
An engaging portion may be positively provided at the tip of 91b. The second holding part 92 connects the pair of engaging pieces 92a and 92b similar to the engaging pieces 82a and 82b of the second holding part 82 of the terminal holding member 8, and connects the pair of engaging pieces 92a and 92b. Further, on the end face thereof, a connecting support portion 92c having a fitting concave portion 92d into which the linear terminal member is fitted is formed. When the connection support portion 92c is provided, it is difficult to deform the end of the linear terminal member, but on the contrary, the end of the linear terminal member can be firmly held. The holding structure of the second holding portion 82 of the terminal holding member 8 may be the same structure as the second holding portion 92 of the spare holding member 9. In some cases, the spare holding member 9 holds a lead wire of a capacitor.

The lead wire holding member 10 also includes a first holding portion 10a and a second holding portion 10b which are arranged at intervals. First and second holding parts 10a and 10b
Are each formed of a pair of engagement pieces similarly to the second holding portion 82 of the terminal holding member 8.

A flat plate portion 1d is provided between the substrate storage room 3 and the substrate storage portion 4a of the accessory parts storage room 4, and the flat plate portion 1d has lead wires L1 connected to terminal fittings 17.
A lead wire fitting portion 20 into which is fitted is protruded. The partition wall 2 has a fitting groove 2 into which the lead wire L1 is fitted.
1 is formed. One end of the lead wire L <b> 1 is buried in the insulating resin layer 19 while being pressed into a fitting groove (not shown) provided in the terminal fitting 17. The other end of the lead wire L1 is connected by soldering to the output electrode of the fixed resistor insulating substrate 22 which forms a part of the high voltage resistor.

The fixed resistor insulating substrate 22 shown in FIG. 1 has a fixed resistor circuit circuit pattern on the surface. The fixed resistor insulating substrate 22 is accommodated in a substrate accommodating portion 4 a of an L-shaped accessory component accommodating room (second accommodating room) 4. The accessory parts storage room 4 further includes a capacitor storage part 4b.
The capacitor housing 4b is formed to be deeper than the substrate housing 4a as seen in the external shape shown in FIG. When combined with a flyback transformer, the capacitor C of the circuit diagram of FIG. 4 is stored in the capacitor storage section 4b.

As shown in FIGS. 1A and 5, the fixed resistor insulating substrate 22 has a bottom wall 1 e located at a position facing the opening of the substrate housing portion 4 a in the wall of the insulating case 1. Are supported upright with respect to the bottom wall 1e by four substrate supporting projections 27-30 fixed via pedestals 23-26. Substrate support projection 2
Pedestal portions 23-2 located between 7-30 and bottom wall portion 1e
Numeral 6 has a shape that increases the creeping distance between the bases of the substrate support projections 27 to 30 and the wall surface of the bottom wall 1e.
The substrate supporting projection 27 located on the highest potential side is a high potential side electrode E1 of the circuit pattern of the fixed resistor insulating substrate 22.
It is disposed so as to be in contact with only the back surface of the fixed resistor insulating substrate at a position away from the low potential side electrode side E2. With such a voltage, the occurrence of current leakage can be sufficiently suppressed. Note that the substrate supporting projections 29 and 30 are also formed on the insulating substrate 2.
2, and only the substrate supporting projections 28 are in contact with the surface of the insulating substrate 22. The insulating substrate 22 is held between the substrate supporting projections 27, 29, and 30 and the substrate supporting projection 28 in a thickness direction.

Hereinafter, A shown in FIGS. 6A to 6D will be described.
-A line sectional view, BB line sectional view, CC line sectional view, and D
The structures of the pedestals 23 to 26 and the substrate supporting projections 27 to 30 will be described with reference to a cross-sectional view taken along line -D. The substrate supporting protrusions 27 and 28 support the high potential side region of the insulating substrate 22. The pedestals 23 and 24 to which the substrate support projections 27 and 28 are fixed have two steps 23a to 24b which are in a two-tiered state.
These steps 23a to 24b are formed so as to surround the bases of the substrate supporting projections 27 and 28. Each of the steps 23a to 24b has a shape in which the outline shape seen from the opening side is rectangular, and the upper steps 23b and 24b have a cross-sectional dimension larger than that of the lower steps 23a and 24a. It is getting smaller. Annular concave portions 23a1 to 24b1 are formed on the upper surfaces of the step portions 23a to 24b so as to surround the bases of the substrate supporting projections 27 and 28. These recesses 23a1 to 24b1 have a shape whose transverse cross section is an inverted triangle. Steps 23a-24
The shapes of the b and the concave portions 23a1 to 24b1 are not limited to those in the embodiment, but may be various shapes such as a circle and a polygon. The substrate supporting projection 27 located on the highest potential side protrudes from the upper end surface of the step portion 23 b of the pedestal portion 23 and contacts only the back surface of the insulating substrate 22. At the base of the next substrate supporting projection 28, a substrate mounting portion 28a for supporting the insulating substrate 22 in contact with the lower end surface of the insulating substrate 22 is provided.

The pedestals 25 and 26 to which the substrate supporting projections 29 and 30 for supporting the low-potential side region of the insulating substrate 22 are fixed are one stepped portions surrounding the bases of the substrate supporting projections 29 and 30. Annular recesses 25a1 and 26a1 are formed on the upper surface of the upper surfaces to surround the bases of the substrate supporting projections 29 and 30.
These steps 25a and 26a also have a rectangular outline when viewed from the opening side, and the recesses 25a1 and 26a1 have an inverted triangular cross section. The substrate supporting projection 29 is provided on the pedestal 25 so as to be in contact only with the back surface of the insulating substrate 22. Substrate support projection 3
A substrate mounting portion 30 a that supports the insulating substrate 22 in contact with the lower end surface of the insulating substrate 22 is provided at the base of the “0”. The substrate support projection 30 includes a first projection 30b that contacts the back surface of the insulating substrate 22 and a second projection 30c that contacts the longitudinal end surface of the insulating substrate 22.
The first projection 30b is integrally provided with a projection 30b1 around which the lead wire L1 is wound. The pedestals and the substrate supporting projections of the present embodiment are integrally formed when the insulating case 1 is formed.

On the bottom wall portion 1e of the substrate housing portion 4a shown in FIG. 1A, a lead wire L2 whose one end is connected by soldering to an input electrode portion (high potential electrode portion) on the insulating substrate 22 is further provided. A lead wire support projection 31 for supporting the other end is provided. As shown in FIG. 6E, a groove 31a for fitting the lead wire L2 is formed at the tip of the lead wire supporting projection 31. The lead wire L2 fitted into the groove 31 is connected to the high potential output terminal of the flyback transformer when combined with the flyback transformer.

An input electrode supporting projection 32 for supporting an input electrode (In electrode) of a capacitor (not shown) is provided on the bottom wall 1e of the substrate housing portion 4a. FIG.
As shown in (F), a pedestal portion 33 is also provided between the input electrode supporting projection 32 and the bottom wall portion 1e. The input electrode supporting projection 32 is formed with a slit 32a for fitting an input electrode of a capacitor (not shown). The input electrode of the capacitor is connected to the high potential output terminal of the flyback transformer and the top of the bleeder resistor BR.

In the high-voltage variable resistor according to the above embodiment, accessory electronic components such as a high-voltage resistor and a capacitor are housed in the insulating case 1. However, the present invention is limited to the case where the accessory electronic components are housed. It is not something to be done. Although the high-voltage variable resistor of the above embodiment is combined with a transformer case of a flyback transformer, the present invention is not limited to the case where the variable resistor is combined with a transformer case.

In the above embodiment, the structure of the terminal holding member for holding the linear terminal member is applied to a high-voltage variable resistor, but the present invention is applied to a high-voltage variable resistor other than the high-voltage variable resistor. Needless to say, the present invention can be applied to electronic parts for electronic devices.

[0039]

According to the present invention, a part of the insulating resin is the first resin.
When the insulating resin is hardened and the insulating resin layer is formed, the insulating resin is hardened to rise in the gap formed between the end surface portion of the holding portion on the insulating substrate housing portion side and a part of the linear terminal member, The other end of the linear terminal member can be securely fixed to the first holding portion. In addition, since there is a gap between the first holding portion and the second holding portion, the insulating resin that moves due to the capillary phenomenon is prevented between the first holding portion and the second holding portion. This can prevent the insulating resin from adhering to the other end of the linear terminal member more than necessary. Further, the holding structure of the first holding unit and the second holding unit is a structure that opens toward the opening direction in which the insulating substrate housing unit opens and receives the other end of the linear terminal member. There is an advantage that the other end of the terminal member can be easily held by the first and second holding portions.

When a groove is formed in the end face of the first holding portion and in the portion of the inner wall of the side wall of the insulating case which faces the part of the linear terminal member, the insulating resin is first retained along the linear terminal member. There is an advantage that it is possible to surely ascend to the end face on the opening direction side of the portion.

The holding structure of the first holding portion has a structure in which a fitting recess for fitting the linear terminal member is formed on the end face on the opening direction side, and the aforementioned groove is continuous with the fitting recess. This has the advantage that the insulating resin can be reliably transferred to the inside of the fitting concave portion, and the linear terminal member can be more reliably fixed to the first holding portion.

Further, the holding structure of the second holding portion is constituted by a pair of engaging pieces which are arranged at intervals so as to sandwich the linear terminal member and have an engaging portion which engages with the linear terminal member. Then, the insertion of the other end of the linear terminal member into the second holding portion is simplified, and the positioning and temporary fixing of the other end of the linear terminal member when forming the insulating resin layer are performed. There is an advantage that it can be easily performed.

[Brief description of the drawings]

FIGS. 1A to 1D are a bottom view, a plan view, a side view, and a front view of an embodiment in which the present invention is applied to a high-voltage variable resistor that is one of high-voltage electronic components. is there.

FIG. 2 is a bottom view of the insulating case.

FIG. 3A is an enlarged side view of a terminal holding member 8;
FIG. 2B is a sectional view taken along line II of FIG. 2, and FIG.
FIG. 2D is an enlarged sectional view taken along the line II-II, and FIG.
It is a line sectional view.

FIG. 4 is a circuit diagram of the embodiment of FIG. 1;

FIG. 5 is a view used to describe a holding structure of an insulating substrate for a fixed resistor.

6A is a sectional view taken along line AA of FIG. 2, and FIG.
FIG. 3 is a sectional view taken along line BB of FIG. 2, and FIG.
2 (D) is a sectional view taken along line DD of FIG. 2, FIG. 2 (E) is a sectional view taken along line EE of FIG. 2, and FIG. 2 (F) is a sectional view taken along line FF of FIG. FIG.

FIG. 7A is a perspective view of a conventional high-voltage variable resistor, which is a type of high-voltage electronic component, as viewed from the back side;
(B) is a perspective view of a main part showing the state of the conventional terminal holding member after welding, and (C) and (D) are perspective views for explaining the structure of another conventional terminal holding member. is there.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulation case 2 Partition wall part 3 Board storage room 4 Accessory parts storage room 5 Fitting wall part 6 Flat plate part 7 Reinforcement engagement convex part 8 Terminal holding member 81 First holding part 81c Groove 82 Second holding part 9 Spare terminal holding member 10 Lead wire holding member 11 Linear terminal member 11a One end 11c Rising part 11d The other end 14, 15, 17 Terminal fitting 18 Insulating substrate 19 Insulating resin layer 22 Insulating substrate for fixed resistor L1, L2 Lead wire 23-26 Pedestal portion 27-30 Projection for supporting substrate

──────────────────────────────────────────────────続 き Continued on the front page (56) References Japanese Utility Model Showa 58-144815 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01F 38/42 H01C 1/14 H01C 13 / 00 H04N 3/185

Claims (5)

(57) [Claims] An insulating case made of an insulating resin having an insulating substrate storage portion having an open end; and a circuit pattern formed on a surface of the insulating case, the inner surface of the insulating case being opposed to the inner wall surface of the insulating case. An insulating substrate housed in the insulating portion, an insulating resin layer formed by filling an insulating resin from an opening of the insulating substrate housing portion, and an insulating resin layer provided in the insulating case adjacent to the opening of the insulating substrate housing portion. And a linear terminal member having one end penetrating through the insulating substrate and connected to the electrode portion of the circuit pattern by soldering, and the other end held by the terminal holding member. Wherein the linear terminal member is located between the one end and the other end, and a portion continuous with the other end extends around the insulating substrate housing portion. Surround the insulating case side wall The terminal holding member is composed of a first holding portion and a second holding portion which are arranged in a direction away from the insulating substrate housing portion and are arranged at intervals. The first and second holding portions each have a holding structure that opens toward an opening direction in which the insulating substrate housing portion opens to receive the other end of the linear terminal member. The holding portion is arranged such that a gap is formed between the end surface portion on the insulating substrate storage portion side and the portion of the linear terminal member so that the insulating resin rises by capillary action. Electronic components for voltage. 2. The opening of the first holding portion in a portion of the end face portion of the first holding portion and an inner wall portion of the side wall of the insulating case facing a portion of the linear terminal member. 2. The high-voltage electronic component according to claim 1, wherein a groove extending continuously to the end face on the direction side is formed. 3. The holding structure of the first holding portion includes a fitting recess formed on the end face on the opening direction side to which the linear terminal member is fitted, wherein the groove is the fitting recess. 3. The high-voltage electronic component according to claim 2, which is continuous. 4. A pair of said holding structures of said second holding portion, wherein said holding structure is provided with a pair of engaging portions which are arranged at an interval capable of sandwiching said linear terminal member and engage with said linear terminal member. The high-voltage electronic component according to claim 1, 2 or 3, comprising an engagement piece. 5. An insulating case made of an insulating resin having an insulating substrate storage portion having an open end, and a resistor circuit pattern formed on a surface thereof, wherein said resistor circuit pattern is provided between an inner wall surface of said insulating case and said surface. An insulating substrate housed in the insulating case so as to form a space in which a slider that slides above is arranged; and an insulating resin filled on the back surface of the insulating substrate from an opening of the insulating substrate housing portion. An insulating resin layer formed on the back surface side of the insulating substrate, a terminal holding member fixed to a plate-shaped portion of the insulating case provided adjacent to the insulating substrate housing portion, and one end portion is A high-voltage variable resistor comprising: a linear terminal member that penetrates an insulating substrate and is connected by soldering to an electrode portion of the resistance circuit pattern and the other end portion is held by the terminal holding portion. The linear terminal member may be And an extension extending along the back surface of the insulating substrate and extending between the extension and the other end, rising from the back surface of the insulating substrate and surrounding the insulating substrate housing portion. A first rising portion extending along a surrounding side wall, wherein the terminal holding member is fixed to the plate-shaped portion so as to be arranged at intervals in a direction away from the insulating substrate housing portion.
The first holding portion and the second holding portion are opened in an opening direction in which the insulating substrate housing portion is opened, and the other of the linear terminal members is opened. Each of the first holding portions has a holding concave portion formed on the end surface portion on the opening direction side and in which the linear terminal member is fitted. An end face of the first holding portion on the insulating substrate storage portion side and an inner wall portion of a side wall of the insulating case surrounding the periphery of the insulating substrate storage portion are opposed to the rising portion of the linear terminal member. A groove extending continuously to an end face of the first holding portion on the opening direction side is formed in the portion, wherein the insulating resin is a capillary phenomenon between the groove and the rising portion of the linear terminal member. Is formed, and the groove is High-voltage variable resistor, characterized in that contiguous with serial the fitting recess of the first holding portion.