JP2949255B2 - 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 called a DC component cut-off or a dynamic focus capacitor is connected to an output electrode of a focus voltage. It may be connected between the ground electrodes 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. 6 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. 6, an insulating case 1 having an open surface on one side.
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.

Accordingly, an object of the present invention is to reduce the size, standardize the connection terminal member, and connect the connection terminal member to the capacitor connection terminal without soldering. The present invention is to provide a variable resistor.

[0010]

In order to achieve the above object, a high voltage variable resistor according to the present invention comprises a film resistor having a variable resistance portion on its surface, a plurality of terminal electrodes including an output terminal electrode, and 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 facing the inner surface with the insulating substrate. An insulating case having a one-sided opening that is housed and fixed so as to be held therein, a conductive rubber that is held in the insulating case and is disposed in close contact with the output terminal electrode, and penetrates the insulating substrate from the back side of the insulating substrate. A capacitor connecting terminal inserted into the conductive rubber, a spring portion that presses and contacts the conductive rubber, and a holding piece that holds the inserted output line, and is held in the insulating case. Connection terminal member and the insulating substrate Is disposed on the back side, it is characterized in that a capacitor connected to the capacitor connection terminal.

According to the above construction, the connection terminal member and the capacitor connection terminal are connected to each other by the conductive rubber which is in contact with the output terminal electrode, and the connection terminal member and the capacitor connection terminal are connected at the same position on the insulating substrate. Parts can be arranged. Therefore, the size of the insulating substrate can be reduced, and the internal space of the insulating case can be effectively used.

Further, by changing the length of the conductive rubber which can be processed or molded at low cost, a reliable contact connection can be obtained with a connection terminal member having a certain size. Therefore,
It is not necessary to use various types of connection terminal members having different dimensions, and it is possible to standardize connection terminal members that require expensive molds, thereby reducing the cost of molds and connection terminal members.

Further, since the output terminal electrode, the connection terminal member, and the capacitor connection terminal can be electrically reliably connected without soldering, complicated processing and work associated with soldering can be eliminated. In addition, the manufacturing cost can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A high-voltage variable resistor according to one 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 sectional view taken along line XX of FIG. 1B, FIG. 3 is a rear view of the insulating case, FIG. 4 is a plan view showing the surface of the insulating substrate, and FIG. 5 is a perspective view of the connection terminal member.
In FIG. 1 (a) and FIG. 2, the lead terminal of the capacitor is 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 4, 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 placed, and an epoxy resin 5 is molded on the back surface of the insulating substrate 2.

The insulation case 1 has output line holding portions 12a, 1
As shown in FIG. 3, connection member housings 13a, 13b, and 13c are provided at the bases of the output line holding units 12a, 12b, and 12c, surrounded by isolation walls. .

As shown in FIG. 4, on the surface of the insulating substrate 2, first and second variable resistance portions 2 for adjusting the focus voltage are provided.
1a, 21b and variable resistance section 2 for adjusting screen voltage
1c, output electrodes 22a and 22b for the first and second focus voltages, output electrode 22c for the screen voltage, output terminal electrodes 23a and 23b electrically connected to the output electrodes 22a, 22b and 22c. 23c, an input terminal electrode 24 electrically connected to the film resistor 21, and a ground terminal electrode 25 are formed. Terminal electrodes 23a, 23b,
Each terminal 61, 62, 63, 6
4 is provided. In addition, for each of the electrodes, an electrode material or a resistor is used.

Each of the sliders 3 is arranged such that one end thereof slides on the corresponding arc-shaped variable resistance portion 21a, 21b, 21c.

The connection member accommodating portion 13a of the insulating case 1 has an output terminal electrode 23a formed on the surface of the insulating substrate 2.
Conductive rubber 7 is housed so as to make pressure contact with
The connection terminal member 8 is housed so that the spring portion 82 comes into pressure contact with the conductive rubber 7.
A capacitor connection terminal 61 is inserted from the back side of the capacitor. That is, one surface of the conductive rubber 7 is the output terminal electrode 23.
The capacitor connecting terminal 61 is connected to the conductive rubber 7 at one end and the resin connecting terminal 61 is connected to the other end of the insulating substrate 2 from the back side of the insulating substrate 2 so that the other surface comes into contact with the connection terminal member 8 so as to contact the connection terminal member 8 5 and is arranged to protrude.

The connection terminal member 8 is stored and fixed in the connection member storage portion 13c such that the spring portion 82 comes into pressure contact with the screen voltage output terminal electrode 23c.

Although not shown, the connection member housing 1 is not shown.
3b, the conductive rubber 7 is housed in contact with the output terminal electrode 23b and the connection terminal member 8, similarly to the connection member housing portion 13a. The connection terminal 62 is inserted.

Input terminal electrode 24 and ground terminal electrode 25
Are connected to an input terminal 63 and a ground terminal 64 by soldering, respectively. Note that a conductive rubber housing for an input terminal and a ground terminal may be provided in the insulating case 1 and the input terminal and the ground terminal may be connected by a conductive rubber. In this case, all electrical connections can be made without soldering.

The capacitor C1 is a coupling capacitor. One lead terminal is connected to the capacitor connection terminal 61, and the other lead terminal is connected to a parabolic waveform signal terminal (not shown). 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 filling and curing the resin 5, but after the capacitors C1 and C2 are mounted,
May be filled.

The connection terminal member 8 is formed by punching 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 in a curved shape. The spring portion 82 is provided.

Output lines for extracting the first and second focus voltages are inserted into the output line holding units 12a and 12b, and output lines for extracting the screen voltage are inserted into the output line holding unit 12c. The cores of the wires are held by holding pieces 81 of each connection terminal member 8, and each output line is connected to the output line holding portion 12.
a, 12b, and 12c cannot be removed.

As described above, in the high-voltage variable resistor of this embodiment, the conductive rubber 7 is connected to the output terminal electrodes 23a and 23b for outputting the first and second focus voltages.
Are arranged, and the connection terminal member 8 and the capacitor connection terminals 61 and 62 are arranged and connected via the conductive rubber 7 at the same position, so that the output terminal electrodes 23a and 23a are 23b is formed small, so that the insulating substrate 2 and the insulating case 1 are miniaturized.

Further, even when the mounting height of the insulating substrate 2 is different, by changing the length of the conductive rubber, a reliable contact connection can be obtained with a connection terminal member having a fixed size. Therefore, standardization of the connection terminal member can be achieved, and the cost of the mold and the cost of the connection terminal member can be reduced.

Further, the output terminal electrode, the connection terminal member, and the capacitor connection terminal are securely connected electrically without soldering. Further, each electrode of the insulating substrate 2 and all the terminals can be connected without performing soldering. That is, there is no need to perform complicated processes and operations associated with soldering, such as solder erosion prevention and cleaning.

Although the above embodiment has been described with reference to the high-voltage variable resistor that outputs two focus voltages and one screen voltage, the 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.

[0031]

As described above, according to the high-voltage variable resistor according to the present invention, the connection portion between the connection terminal member and the capacitor connection terminal can be arranged at the same position perpendicular to the surface of the insulating substrate. Because the size of the insulating substrate can be reduced, the internal space of the insulating case can be used effectively,
The size can be reduced.

Further, by changing the length of the conductive rubber, a reliable contact connection can be obtained with a connection terminal member having a certain size, so that the connection terminal member can be standardized, and the cost of the mold and the cost of the mold can be reduced. The cost of the connection terminal member can be reduced.

Furthermore, since the output terminal electrode, the connection terminal member, and the capacitor connection terminal can be electrically connected reliably without soldering, complicated processing and work associated with soldering can be eliminated. In addition, the manufacturing cost can be reduced.

[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 a rear view of the insulating case according to the embodiment of the present invention.

FIG. 4 is a plan view showing a surface of an insulating substrate 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 cross-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 23a, 23b Output terminal electrode 3 Slider 4a, 4b, 4c Rotation shaft 5 Resin 61, 62 Terminal for capacitor connection 7 Conductive rubber 8 Connection Terminal member 81 Nipping piece 82 Spring part C1, C2 Capacitor

Claims (1)

(57) [Claims] 1. A film resistor including a variable resistance portion on a surface,
An insulating substrate on which a plurality of terminal electrodes including an output terminal electrode are formed; a rotary shaft including a slider that slides on a variable resistance portion of the film resistor; and wherein the rotary shaft is bearing, and A one-sided opening-shaped insulating case in which the insulating substrate is housed and fixed so that the surface faces the inner bottom portion; a conductive rubber held in the insulating case and arranged in close contact with the output terminal electrode; It has a capacitor connecting terminal inserted into the conductive rubber through the insulating substrate from the back side of the insulating substrate, a spring portion that presses and contacts the conductive rubber, and a holding piece that holds the inserted output line. And a connection terminal member held in the insulating case; and a capacitor disposed on the back side of the insulating substrate and connected to the capacitor connection terminal. Resistor.