JPH0745929Y2 - Variable resistor for high voltage - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a high-voltage variable resistor used in a TV receiver, a CRT display, or the like.

<Prior Art> Conventionally, as a high-voltage variable resistor of this type,
It is known to be configured as shown in the cross-sectional plan view of the figure. The high-voltage variable resistor 20 includes an insulating substrate 21 having a rectangular shape in plan view, an insulating case 22 that houses and holds the insulating substrate 21, and a resistance pattern 23 formed by printing on the surface of the insulating substrate 21. It is provided with a pair of movable contacts 24, 25 that slide on the surface to divide the input voltage.

On the surface of the insulating substrate 21, in addition to the resistance pattern 23, the input electrode 26, the ground electrode 27, the first output electrode 28 from which the output voltage of several thousand V is taken out, and the output voltage of several hundred V are taken out. Two output electrodes 29 are formed by printing. Further, the inner ends of the lead wires 30 and 31 penetrating the insulating substrate 21 are respectively provided to the first and second output electrodes 28 and 29 formed at both corners along one long side of the insulating substrate 21. The parts are connected by soldering.

Further, on the upper end surface 22a of the insulating case 22 which is the short side of the insulating substrate 21, a pipe 32 forming a pair of connector pins,
33 are buried. The outer end portions of the lead wires 30 and 31 inserted into the pipes 32 and 33 are connected to the outer end surfaces of the pipes 32 and 33 by soldering. That is,
In this high-voltage variable resistor 20, the first and second
Each of the lead wires 30, 31 connected to the output electrodes 28, 29 of the is bent in a direction in which the respective intermediate portions thereof are separated from each other, and the outer ends of the lead wires 30, 31 are soldered to the pipes 32, 33. They are integrated, so that a pair of external output terminals extending to the outside of the insulating case 22 is configured. Reference numerals 34 and 35 in FIG. 2 are guides that surround the pipes 32 and 33, respectively.

Insulation case 2 for pipes 32 and 33 that are connector pins on the output side
The reason why it is arranged on the upper end face 22a of 2 is as follows. That is, this type of high-voltage variable resistor, when housed in a member such as a flyback transformer, in view of the housing efficiency and the like, in the figure of the insulating case 22 which is the short side of the insulating substrate 21, the lower side. It is performed that the end surface is placed on the mounting surface and is mounted upright. On the other hand, for the high-voltage variable resistor mounted in this way, the output terminal of the high-voltage variable resistor
There is a demand to automate the work of connecting with a CRT display, etc. by a robot.

Therefore, in the above-mentioned mounting form, in order to meet the demand for automation of connection, it is necessary to set the connection point above the high-voltage variable resistor that can secure a sufficient connection work space. In the container 20, pipes (connector pins) 32, 33 are provided on the upper end surface 22a of the insulating case 22.
Was provided.

<Problems to be Solved by the Invention> By the way, in the high voltage variable resistor 20 of the conventional structure,
There is an inconvenience that the whole shape becomes large. That is, since the potential difference between the first and second output electrodes 28, 29 is large, it is necessary to secure the insulating property by widely separating the lead wires 30, 31 from each other, and the insulation in which the pipes 32, 33 are buried is required. It is necessary to lengthen the end surface 22a of the case 22, that is, to increase the width dimension of the insulating case 22 itself, and the overall outer shape of the high voltage variable resistor is increased.

The present invention was devised in view of such inconveniences of the prior art, and an object thereof is to provide a high-voltage variable resistor capable of preventing an increase in the overall outer size.

<Means for Solving the Problems> In order to achieve such an object, the present invention provides a resistance pattern and a first output voltage which is different from each other.
And the second output electrode are formed on the surface of the insulating substrate having a rectangular shape in plan view, an insulating case for housing and holding the insulating substrate, and one short side of the insulating substrate are arranged in parallel at a predetermined distance. A pair of output terminals, and the output electrodes are spaced apart from each other near both corners on the short side of the surface of the insulating substrate, and the first electrode is provided on the surface of the insulating substrate.
A relay electrode is arranged and formed near a corner opposite to the output electrode on a diagonal line of the insulating substrate.
Connect to the output electrode with the connector provided on the back surface of the insulating substrate,
A high voltage variable resistor is constructed by connecting the first output electrode and the second output electrode to corresponding output terminals.

<Operation> According to the above configuration, the pair of output terminals, which are arranged in parallel on one short side of the insulating substrate at a predetermined distance, are spaced apart from each other on both sides of the short side. It is connected to each of the first and second output electrodes. Therefore, it becomes possible to keep the distance between the output terminals sufficiently and to ensure the insulation property, and to arrange the output terminals within the width of the insulating substrate.

Since the connection body that connects the relay electrode and the second output electrode is provided on the back surface of the insulating substrate, the insulation between the connection body and the resistance pattern is ensured.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional plan view showing a schematic configuration of a high voltage variable resistor, and reference numeral 1 in this figure is a high voltage variable resistor. The high voltage variable resistor 1 is composed of an insulating substrate 2 having a rectangular shape in a plan view, an insulating case 3 for housing and holding the insulating substrate 2, and a pair of movable contacts 4 and 5. There is. Although these movable contacts 4 and 5 are not shown,
It is attached to the tip of the rotary shaft that is supported by the insulating case 3.

On the surface of the insulating substrate 2, the resistance pattern 6 having a predetermined shape on which the movable contacts 4 and 5 slide, the input electrode 7, and the ground electrode 8 are provided.
Is formed by printing, the first output electrode 9 from which an output voltage of several thousand V is taken out and the second output electrode 11 from which an output voltage of several hundred V is taken out are formed on one short side of the surface of the insulating substrate 2 ( They are formed so as to be spaced apart from each other on both sides of the upper short side).

A relay electrode 10 is formed by printing on the surface of the insulating substrate 2 near the corner of the other short side of the insulating substrate 2 which is opposite to the first output electrode 9 on the diagonal line. A conductive pattern 12 is formed by printing on the back surface of the insulating substrate 2 along the long side where the second output electrode 11 is provided, and the relay electrode 10 and the second output electrode 11 pass through this conductive pattern 12. It is connected. With this structure, the conductive pattern 12 and the resistance pattern 6 are close to each other, but they are formed on the front and back of the insulating substrate 2, respectively, and the insulating substrate 2 is interposed between them, so that the insulating property is sufficient. Secured in.

The relay electrode 10 and the second output electrode 11 may be connected by a lead wire instead of the conductive pattern 12.

When the conductive pattern 12 is used to connect the relay electrode 10 and the second output electrode 11, the conductive pattern 12 and the electrodes 10 and 11 can be connected by, for example, through-hole connection. When using a lead wire, the connection between the lead wire and each of the electrodes 10 and 11 may be, for example,
Solder connections can be used.

Further, these first output electrode 9 and second output electrode 11
The output terminals 13 and 14 such as connector pins made of metal rods arranged in parallel on one short side of the insulating substrate 2 are connected to each by soldering. That is, these output terminals 13 and 14 are soldered with one end side thereof penetrating the insulating substrate 2 from the back surface side of the insulating substrate 2 and protruding to the respective output electrodes 9 and 11 and insulated in a state of being separated from each other. The upper end surface 3a of the case 3 is penetrated and the other end side is extended to the outside. These output terminals 13 and 14 naturally have a potential difference between them, but the first and second output electrodes 9 and 11 are
Since they are arranged sufficiently apart from each other along one short side of one of the output terminals 13 and 1 connected to these electrodes 9 and 11,
A sufficient separation distance between the four can be secured, and its insulating property can be sufficiently secured.

In the insulating case 3 configured to house the insulating substrate 2 and the like as described above, the output terminals 13 and 14 are formed within the width of the insulating substrate 2. Therefore, the insulating case 3 need not be made larger than necessary.

In addition, reference numerals 15 and 16 in FIG. 1 denote guides surrounding the output terminals 13 and 14, respectively.

Furthermore, the mounting structure of the output terminals 13 and 14 is not limited to that of the embodiment, and one end side of the output terminals 13 and 14 is directly arranged on the front surface side of the insulating substrate 2 to output electrodes of the insulating substrate 2. In addition to the structure of soldering to 9,11, the conductive rubber is pressed against each output electrode 9 and 11 (this pressing is performed, for example, by sandwiching between the insulating substrate 2 and the inner bottom surface of the insulating case 3). Then, the structure in which the output terminals 13 and 14 are inserted into this conductive rubber, and the relay terminals with press-fitting parts (connecting parts) are soldered to the output electrodes 9 and 11 to stand upright, and then the press-fitting of these relay terminals is performed. It goes without saying that the structure may be such that the output terminals 13 and 14 are press-fitted and fixed to the parts. Further, the output terminals 13 and 14 may be of a lead wire type.

<Effects of the Invention> As described above, according to the present invention, the output terminals are arranged in parallel on one short side of the insulating substrate at a predetermined distance, and are arranged near both corners of the short side. It is connected to each of the first and second output electrodes arranged apart from each other. Therefore, it has become possible to secure a sufficient distance between the output terminals and to ensure the insulation property, and to arrange the arrangement positions within the width of the insulating substrate. Therefore, since the arrangement position of the output terminal does not extend beyond the insulating substrate, the high voltage variable resistor can be downsized.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view showing a schematic configuration of a high-voltage variable resistor according to an embodiment of the present invention, and FIG. 2 is a cross-sectional plan view showing a schematic configuration of a high-voltage variable resistor according to a conventional example. Is. In the figure, reference numeral 1 is a high voltage variable resistor, 2 is an insulating substrate, 3 is an insulating case, 6 is a resistance pattern, 9 is a first output electrode, 10 is a relay electrode, 11 is a second output electrode, and 13 and 14 are It is an output terminal.

Claims (3)

[Scope of utility model registration request] 1. A resistance pattern (6) and first and second output electrodes (9, 9) from which respectively different output voltages are taken out.
11) An insulating substrate (2) having a rectangular shape in plan view formed on the surface, an insulating case (3) for housing and holding the insulating substrate (2), and one short side of the insulating substrate (2). A pair of output terminals (13, 14) arranged in parallel at a predetermined distance from each other, the output electrodes (9, 11) being close to both corners on the short side of the surface of the insulating substrate (2). Placed apart from each other,
On the surface of the insulating substrate (2), a relay electrode (10) is arranged and formed near a corner opposite to the first output electrode (9) on the diagonal line of the insulating substrate (2). And the second output electrode (11) are connected by a connector (12) provided on the back surface of the insulating substrate (2), and the first output electrode (9)
And a second output electrode (11) connected to corresponding output terminals (13, 14) respectively, a variable resistor for high voltage. 2. The high voltage variable resistor according to claim 1, wherein the connection body is a conductive pattern formed on the insulating substrate. 3. The variable resistor for high voltage according to claim 1, wherein the connecting body is a lead wire.