JPS5934085Y2 - Sliding variable resistor with light source - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sliding variable resistor with a light source, in which a light source is attached to the sliding variable resistor.

A conventional sliding type variable resistor with a light source is explained with reference to FIG. The power supply contact plates 4 and 5 provided, the brushes 7 and 8 provided on the bottom of the slider 6, the lever 1 and the slider 6
Power is supplied through lead-out terminals 9 and 10 that penetrate inside.

On the other hand, the brushes 11 and 12 electrically connected to each other slide on the resistor 13 and the contact plate 14, respectively, and the terminal 15
and 16.

Further, the box-shaped cover 17 has a long groove 18, and the lever can move along the longitudinal direction of the long groove 18 while being inserted into the long groove 18.

In the conventional sliding type variable resistor with a light source, its width l is determined by the width l' of the mounting board 3. , the resistor 13 and the contact plate 14 are arranged in four rows in parallel, which forces the width length l' to be large, which is an obstacle to making the variable resistor smaller and lighter. Ta.

The present invention eliminates the above-mentioned conventional drawbacks and provides a small and lightweight sliding type variable resistor with a light source.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a sectional view of a sliding type variable resistor with a light source according to an embodiment of the present invention, and FIG. 3 is an enlarged view of the main parts of the variable resistor.

In these figures, reference numeral 19 denotes a mounting board made of an insulating material, on which a resistor 20 and a contact plate 21 are mounted in parallel.
The power supply contact plate 22 is connected to the resistor 20 and the contact plate 2.
It is installed parallel to 1.

Furthermore, external terminals 23, 24, and 25 are provided at one end of the resistor 20, the contact plate 21, and the power supply contact plate 22, respectively.
, 24 and 25 are drawn out from the lower surface of the mounting board 19.

Reference numeral 26 denotes a metal box-shaped case with a U-shaped cross section and a mounting board 19 attached to the bottom opening.
An external terminal 26a is taken out from the side, and a long groove 27 is formed in the center of the upper surface.

Reference numeral 28 denotes a slider made of an insulating material and placed inside the space formed by the mounting board 19 and the box-shaped case 26. A lever 29 provided integrally or separately at the center of the upper surface of the slider 28 is connected to the box-shaped case 26. It protrudes upward from the long groove 27.

Brushes 30 and 31 are fixed to the lower surface of the slider 28, respectively, and slide on the resistor 20 and the contact plate 21 while coming into contact with each other as the slider 28 moves. A brush 32 that slides on the contact plate 22 is fixed.

On the other hand, a slide spring 33 is fixed to the upper surface of the slider 28.

This slide spring 33 is attached to the lever 2 on the top surface of the slider 28.
It is fixed to the base of 9 with screws etc.

The upper surface contact portions 33 a and 33 b of the slide spring 33 are in contact with the inner surface of the upper surface of the metal box-shaped case 26 , and slide while contacting the inner surface of the upper surface of the box-shaped case 26 as the slider 28 moves. .

Further, the slide spring 33 is provided with a pawl portion 33C.

A light source 34 such as a light emitting diode is attached to the upper end of the lever 29, and one lead-out terminal 34 of this light source 34 is attached to the upper end of the lever 29.
a is inserted into the insertion hole 29a of the lever 29, passes through the inside of the slider 28, and is connected to the brush 32.

The other lead terminal 34b has an end 34C connected to the lever 2.
The lead-out terminal 34b is inserted into the opening of the insertion hole 29b in an exposed state, and the end 34C of the lead-out terminal 34b is in contact with the resilient pawl 33C of the slide spring 33.

According to the above structure, the width of the mounting board 19 shown in FIG. 2 can be reduced only in the conventionally provided portion of the power supply contact plate 4 shown in FIG. Resistors can be made smaller.

Next, the operation of the sliding type variable resistor with a light source configured as described above will be explained.

FIG. 4 is a circuit diagram of the sliding type variable resistor with light source shown in FIG. 2.

First, as shown in Figure 4, during operation, the power supply contact plate 2
Since the external power supply 35 is connected between the external terminal 25 of No. 2 and the external terminal 263 of the metal box-shaped case 26, the current flows from the external power supply 35 to the external terminal 25 to the power supply contact plate 22 to the brush 32 to the lead-out terminal. 34 a → light source 34 → lead-out terminal 34 b →
The light flows in the order of claw portion 33C→top contact portions 33a and 33b→box-shaped case 26 main body terminal 26a→external power source 35, and light source 34 lights up.

Further, the external terminal 23 of the resistor 20 and the external terminal 24 of the contact plate 21 are each connected to a circuit such as a device (not shown) that requires a variable resistance.

Now, when the lever 29 is held and the slider 28 is moved from side to side in FIG. 4, the slider 28 easily moves along the longitudinal direction of the long groove 27.

By sliding the slider 28 from side to side within the internal space formed by the mounting board 19 and the case 26,
Brushes 30 and 3 fixed to the lower surface of the slider 28
1 slides on the resistor 20 and the contact plate 21, respectively.

As a result, the variable resistance value can be taken out from between the external terminals 23 and 24.

On the other hand, as the slider 28 slides, the brush 32 slides on the power supply contact plate 22, and at the same time, the top contact portions 33a and 33b of the slide spring 33 move while constantly in contact with the top inner surface of the box-shaped case 26. do.

In this way, no matter where the slider 28 is positioned, the light source 34 is powered and maintains a constant brightness.
The user can easily know the position of the lever 29 by the light from the light source 34.

In the above embodiment, the box-shaped case 26 is made of metal, and the main body of the box-shaped case 26 is used as a path for current from the external power source 35 to the light source 34.

This has the effect of making the configuration extremely simple and reducing manufacturing costs.

As shown in FIG. 5 as another embodiment, the box-shaped case 35 is made of an insulator, and the inner surface of the upper surface of the box-shaped case 35 is in opposing contact with the upper surface contact portion 33 a or 33 b of the slide spring 33. By attaching a conductive plate 36 a or 36 b to the portion, a conductive portion that serves as a path for current from the external power source to the light source 34 may be formed.

Although this configuration makes the configuration a little more complicated, the contact between the upper surface contact portion 33a of the slide spring 33 and the conductive plate 36a, and between the upper surface contact portion 33b and the conductive plate 36b is improved, resulting in better operating characteristics. can get.

As described above, the sliding type variable resistor with a light source according to the present invention is constructed, and the variable resistor can be used without any loss of the conventional function of making the knob illuminate by attaching a light source. This has the effect of making it smaller and lighter.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of a conventional sliding variable resistor with a light source.
FIG. 2 is a sectional view of a sliding variable resistor with a light source according to an embodiment of the present invention, FIG. 3 is an enlarged view of the main part of FIG. 2, and FIG. 4 is a circuit diagram of the variable resistor circuit. FIG. 5 is a sectional view of a main part of a sliding type variable resistor with a light source in another embodiment of the present invention. 19... Mounting board, 20... Resistor,
21...Contact plate, 22...Contact plate for power supply, 26...Metal box-shaped case, 27.
... Long groove, 28 ... Slider, 29.
...Lever, 29a, 29b...Through hole, 30, 31, 32...Brush, 33...
・Slide spring, 34... Light source, 34 a,
34 b...Leading terminal, 35... Box-shaped case made of insulator, 36a, 36b... Conductive plate.

Claims (3)

[Scope of utility model registration request] (1) At least one resistor and one
A mounting board made of an insulating material is attached, which is provided with two contact plates and one contact plate for power supply. A brush that conducts the contact plate and a brush that slides on the power supply contact plate are fixed respectively, and a lever is provided on the upper surface side of the slider that projects upward from the long groove of the box-shaped case, and a light source is attached to the lever. and fix a slide spring that slides on the conductive part of the box-shaped case to the base of the lever on the top surface of the slider,
One lead-out terminal of the light source is connected to the brush that slides on the power supply contact plate through the insertion hole provided in the lever and the slider, and the other lead-out terminal of the light source is connected to the brush that slides on the power supply contact plate. The light source is connected to the slide spring through the insertion hole, and the light source and the external power source are electrically connected through an external terminal provided on the conductive part of the box-shaped case and an external terminal provided on the power supply contact plate. Sliding variable resistor with light source. (2) The sliding type variable resistor with a light source according to claim 1, wherein the conductive part of the box-shaped case is a metal box-shaped case body. (3) Scope of Utility Model Registration Claim 1: The conductive part of the box-shaped case is a conductive plate provided on the inner surface of the upper surface of the insulating box-shaped case.
Sliding type variable resistor with light source as described in .