JP2949256B2 - High-voltage variable resistor - 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 variable resistor used for adjusting a focus voltage and a screen voltage of a television receiver or the like.

[0002]

2. Description of the Related Art In a high-voltage variable resistor used for adjusting a focus voltage or a screen voltage of a television receiver or the like, a capacitor for cutting off an AC component and for inputting a dynamic focus signal is connected to a focus voltage output electrode. It may be connected between the ground electrode or between the output electrode and the signal input terminal.

Conventionally, these capacitors are arranged on the back side of an insulating substrate housed in an insulating case having a one-sided opening, and a connecting terminal member having a holding piece for holding a core of an inserted output line is provided with a spring. Part of the spring part is pressed into contact with the output electrode formed on the surface of the insulating substrate, so that the connection between the output electrode and the output line is possible without soldering. There is a variable resistor.

FIG. 7 is a sectional view of a main part showing a connection structure of a focus voltage output section of such a conventional high voltage variable resistor. As shown in FIG.
The insulating substrate 2 is housed and fixed in the housing, and the connecting member housing part 1
3 are provided.

[0005] The connection terminal housing 8 is connected to the connection terminal member 8 such that the spring 82 presses against a focus voltage output terminal electrode (not shown) formed on the surface of the insulating substrate 2.
Are housed and fixed, and the capacitor connection terminal 6 inserted from the back surface of the insulating substrate 2 is connected by soldering to the output terminal electrode. A capacitor is connected to the capacitor connection terminal 6.

An output line for extracting a focus voltage from the output line holding section 12 is inserted, and a core of the output line is sandwiched by a plurality of sandwiching pieces 81 formed on the connection terminal member 8.

[0007]

However, in the above-mentioned conventional high-voltage variable resistor, a portion for soldering the capacitor connecting terminal 6 and a portion for contacting the connecting terminal member 8 are required. In addition, a large output terminal electrode must be formed, and both spaces must be secured inside the insulating case 1, which causes a problem that the size of the entire high-voltage variable resistor increases.

Further, when the distance of the output line holding portion 12 from the surface of the insulating substrate 2 is changed, various types of connection terminal members having dimensions corresponding to the distance are required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a high-voltage variable resistor that can be miniaturized, can standardize connection terminal members, and can obtain a stable and reliable connection. is there.

[0010]

According to a first aspect of the present invention, there is provided a high-voltage variable resistor according to the first aspect of the present invention, wherein a film resistor including a variable resistor portion on a surface thereof and a plurality of terminals including an output terminal electrode. An insulating substrate on which electrodes are formed, a rotating shaft having a slider that slides on a variable resistance portion of the film resistor, the rotating shaft being bearing, and the insulating substrate having the surface having an inner bottom portion; A one-sided open insulating case housed and fixed so as to be opposed to the insulating case, and disposed so as to pass through the insulating substrate, and has a fixing flange at a predetermined position, and the fixing flange is in close contact with the output terminal electrode. And the capacitor connection terminal soldered and
A spring portion that presses and contacts the tip of the capacitor connection terminal, and a holding piece that holds the inserted output line,
A connection terminal member held in the insulating case and connecting the output terminal electrode and the output line without soldering, and a capacitor disposed on the back side of the insulating substrate and connected to the capacitor connection terminal. It is characterized by having.

According to a second aspect of the present invention, in the high-voltage variable resistor according to the first aspect, a contact flange is formed at a tip of the capacitor connection terminal so that a spring portion of the connection terminal member presses and contacts. It is characterized by having been done.

According to the above arrangement, the fixing flange is pressed against the output terminal electrode formed on the surface of the insulating substrate and inserted, thereby accurately positioning the capacitor connecting terminal in the direction perpendicular to the insulating substrate. It can be carried out. In other words, the capacitor connection terminals can be reliably arranged such that their tips are at a fixed distance from the surface of the insulating substrate, and stable and reliable contact connection with the spring portion of the connection terminal member can be obtained.

[0013] Also, a connection terminal member is contact-connected to the tip of the capacitor connection terminal connected to the output terminal electrode,
The connection portion between the connection terminal member and the capacitor connection terminal can be arranged at the same position on the insulating substrate. Therefore, the size of the insulating substrate can be reduced, and the internal space of the insulating case can be effectively used.

By changing the position of the fixing flange, the tip of the capacitor connection terminal can be set at a desired position, so that a reliable contact connection can be obtained with a connection terminal member having a fixed size. . Therefore, it is not necessary to use various types of connection terminal members having different dimensions, it is possible to standardize connection terminal members that require an expensive mold, and it is possible to reduce the cost of the mold and the cost of the connection terminal members. .

Further, by providing a contact flange at the tip of the capacitor connection terminal and increasing the contact area of the connection terminal member with the spring portion, more stable and reliable contact connection can be obtained.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A high-voltage variable resistor according to an embodiment of the present invention will be described below with reference to FIGS. FIG.
(A) is a side view of the high-voltage variable resistor, (b) is a front view,
(C) is a rear view. 2 is a cross-sectional view taken along line XX of FIG. 1B, FIG. 3 is an enlarged cross-sectional view of a main part showing a connection structure of a high-voltage output section of the high-voltage variable resistor, and FIG. 4 is a perspective view of a capacitor connection terminal. FIG. 5 is a perspective view of the connection terminal member. In addition,
1 (a), 2 and 3, the lead terminals of the capacitors are omitted.

The high-voltage variable resistor according to the present embodiment is a so-called double focus type which outputs two kinds of focus voltages and one screen voltage.
As shown in FIGS. 1 to 3, an insulating substrate 2 made of alumina or the like is adhered and fixed to a step formed on the inner peripheral surface of an insulating case 1 having a one-sided opening, and provided on a front surface of the insulating case 1. Sliders 3 are provided on the cylindrical bearing portions 11a, 11b, 11c.
Are mounted on the rotating shafts 4a, 4b, 4c bearing
Capacitor connection terminals 61, 6 are provided on the back side of the insulating substrate 2.
2. A high voltage input terminal 63 and a ground terminal 64 are led out and connected to these predetermined terminals to connect the capacitors C1,
C2 is mounted, and an epoxy resin 5 is molded on the back side of the insulating substrate 2 (resin is omitted in FIG. 3).

The insulating case 1 has output line holding parts 12a, 1
2b and 12c are integrally formed, and each output line holding portion 12
Connection member storage portions 13a and 13c are provided at the roots of a, 12b, and 12c, surrounded by isolation walls.

Although not shown, the surface of the insulating substrate 2 is provided with a film resistor including first and second variable resistors for adjusting the focus voltage and a variable resistor for adjusting the screen voltage. 2, an output electrode for the focus voltage and an output electrode for the screen voltage, an output terminal electrode connected to each output electrode, and an input terminal electrode connected to the film resistor 21;
A ground terminal electrode is formed. At substantially the center of each terminal electrode except the output terminal electrode for screen voltage output, a through hole for inserting each terminal 61, 62, 63, 64 is provided. Each slider 3 is arranged such that one end thereof slides on a corresponding arc-shaped variable resistance section.

The insulating substrate 2 is inserted into the connecting member storage portion 13a at the base of the output line holding portion 12a of the insulating case 1.
The fixing flange 6a is soldered to an output terminal electrode formed on the surface of the insulating substrate 2, the capacitor connecting terminal 61 is arranged, and the spring 82 is formed at the tip of the capacitor connecting terminal 61 by a contact flange. The connection terminal member 8 is housed and fixed so as to press and contact the portion 6b. That is, one end of the capacitor connection terminal 61 contacts and is connected to the connection terminal member 8, and the other end is disposed so as to protrude above the resin 5 from the back surface side of the insulating substrate 2.

The connection terminal member 8 is housed and fixed in the connection member housing portion 13c such that the spring portion comes into pressure contact with the screen voltage output terminal electrode.

Although not shown, the output line holding unit 12
The connection member storage portion 13 at the root of the connection member storage portion 13
Similarly to a, the capacitor connection terminal 62 having the fixing flange 6a and the contact flange 6b formed thereon is disposed, and the connection terminal member 8 is housed and fixed by being pressed into contact with the contact flange 6a.

The input terminal 63 and the ground terminal 64 are connected to the input terminal electrode and the ground terminal electrode by soldering, respectively.

The capacitor C1 is a capacitor for coupling a dynamic focus signal. One lead terminal is connected to a capacitor connection terminal 61, and the other lead terminal is connected to a parabolic waveform signal terminal (not shown). You. The capacitor C2 is a filter capacitor. One lead terminal is connected to the capacitor connection terminal 62, and the other lead terminal is connected to the ground terminal 64.

In this embodiment, the capacitors C1 and C2 are mounted after the resin 5 is filled and cured. However, the resin 5 may be filled after the capacitors C1 and C2 are mounted.

The capacitor connecting terminals 61 and 62 are obtained by cutting a linear conductor having a circular cross section to a predetermined length.
As shown in FIG. 4, two disk-shaped flange portions, a fixing flange portion 6a and a contact flange portion 6b, are provided. Contact flange 6b
Is provided at one end, and the fixing flange 6a is provided at a predetermined interval from the contact flange 6b. The fixing flange 6a and the contact flange 6b are formed by header processing or the like.

The fixing flange 6a is provided for accurately positioning the capacitor connecting terminals 61 and 62 in the vertical direction. It is provided for obtaining stable and reliable contact with the spring portion 81 of the member 8. Fixing flange 6
The distance between the contact a and the contact flange 6b, that is, the position where the fixing flange 6a is formed, is appropriately set according to the dimensions of the connection terminal member 8 and the mounting height of the insulating substrate 2.

The capacitor connecting terminals 61 and 62
Is inserted from the front surface side of the insulating substrate 2 into a through hole provided substantially in the center of the output terminal electrode for outputting a focus voltage of the insulating substrate 2, and the fixing flange 6 a is brought into close contact with each output terminal electrode to form a solder. After being attached, it is bent on the back side of the insulating substrate 2.

The connection terminal member 8 is formed by stamping a flat metal plate. As shown in FIG. 5, the connection terminal member 8 is formed by bending a plurality of holding pieces 81 for holding the core of the output line and a curved shape. The spring portion 82 is provided.

The output line holding sections 12a and 12b are provided with output lines for extracting the first and second focus voltages.
An output line for extracting a screen voltage is inserted into 2 c, and a core wire of each inserted output line is a holding piece 8 of each connection terminal member 8.
1, each output line is connected to the output line holding units 12a, 12a.
b, 12c.

As described above, in the high-voltage variable resistor according to the present embodiment, the connection terminal member 8 and the capacitor connection terminals 61 and 62 are arranged and connected at the same position.
The corresponding output terminal electrode is formed smaller than the conventional one, so that the insulating substrate 2 and the insulating case 1 are downsized.

Further, even when the mounting height of the insulating substrate 2 is different, by changing the forming position of the fixing flange 6a, the contact flange 6b can be set at a desired position. Reliable contact connection can be obtained with the terminal member.
Therefore, it is possible to standardize the connection terminal member,
The cost of the mold and the cost of the connection terminal member can be reduced.

The contact flange provided at the tip of the capacitor connecting terminal is not essential. As shown in FIG. 6, the capacitor connecting terminals 61 and 62 are fixed to the fixing flange 6.
Only a may be formed. Even when a capacitor connection terminal as shown in FIG. 6 is used, stable connection can be obtained by forming a flat and wide contact portion on the spring portion of the connection terminal member.

In the above embodiment, the description has been given of the high-voltage variable resistor for outputting two focus voltages and one screen voltage. However, the present invention is not limited to this, and at least one focus voltage or screen voltage is output. The present invention can be applied to a high-voltage variable resistor.

The wiring and connection of the capacitor are not limited to those of the above-described embodiment, but are appropriately set according to required characteristics.

[0036]

As described above, according to the high-voltage variable resistor according to the present invention, since the positioning can be performed with high accuracy by the fixing flange, the tip of the capacitor connecting terminal is fixed at a predetermined distance from the surface of the insulating substrate. The connection terminal member can be reliably arranged so as to be at a distance, and a stable and reliable contact connection with the spring portion of the connection terminal member can be obtained.

Further, since the connection portion between the connection terminal member and the capacitor connection terminal can be arranged at the same position in the direction parallel to the insulating substrate, the insulating substrate can be made small and the internal space of the insulating case can be effectively used. The size of the high-voltage variable resistor can be reduced.

Further, by changing the formation position of the fixing flange, the position of the tip of the capacitor connection terminal can be set to a desired position, so that various types of connection terminal members having different dimensions are not required. Standardization of the connection terminal member requiring an expensive mold can be performed, and the mold cost and the cost of the connection terminal member can be reduced.

Further, by providing a contact flange at the tip of the capacitor connection terminal and increasing the contact area of the connection terminal member with the spring portion, more stable and reliable contact connection can be obtained.

[Brief description of the drawings]

1A is a side view of a high-voltage variable resistor according to one embodiment of the present invention, FIG. 1B is a front view, and FIG. 1C is a rear view.

FIG. 2 is a sectional view taken along line XX of FIG. 1 (b).

FIG. 3 is an enlarged sectional view of a main part showing a connection structure of a high voltage output section of the high voltage variable resistor according to one embodiment of the present invention.

FIG. 4 is a perspective view of a capacitor connection terminal according to one embodiment of the present invention.

FIG. 5 is a perspective view of a connection terminal member according to one embodiment of the present invention.

FIG. 6 is a perspective view of a capacitor connection terminal according to another embodiment of the present invention.

FIG. 7 is a sectional view of a main part showing a connection structure of a high-voltage output unit of a conventional high-voltage variable resistor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulation case 12a, 12b Output line holding part 13a Connection member storage part 2 Insulating board 3 Slider 4a, 4b, 4c Rotating shaft 5 Resin 61, 62 Capacitor connection terminal 6a Fixing flange 6b Contact flange 8 Connection Terminal member 81 Nipping piece 82 Spring part C1, C2 Capacitor

Claims (2)

(57) [Claims] 1. An insulating substrate having on its surface a film resistor including a variable resistance portion and a plurality of terminal electrodes including an output terminal electrode; and a slide sliding on the variable resistance portion of the film resistor. A rotating shaft having a rotor, a one-sided opening-shaped insulating case in which the rotating shaft is bearing, and the insulating substrate is housed and fixed so that the surface faces the inner bottom portion; The fixing flange portion is disposed and has a fixing flange at a predetermined position, and the fixing flange portion comes into close contact with the output terminal electrode and is soldered to the capacitor connecting terminal, and presses and contacts the tip of the capacitor connecting terminal. It has a spring portion and a holding piece for holding the inserted output line,
A connection terminal member that is held in the insulating case and connects the output terminal electrode and the output line without soldering, and a capacitor that is disposed on the back side of the insulating substrate and is connected to the capacitor connection terminal. A high-voltage variable resistor, comprising: 2. A high-voltage variable resistor according to claim 1, wherein a contact flange is formed at an end of said capacitor connection terminal to press and contact a spring portion of said connection terminal member. .