JPS62165Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a rotary multiple variable resistor in which a plurality of rotating hollow shafts each having a variable resistor at one end and a knob at the other end are superimposed on the same axis. This invention relates to a rotary multiple variable resistor in which the operating position of each knob can be displayed using a single light source.

In the case of conventional rotary multiple variable resistors, there is no way to display the operating position by transmitting light from inside each knob, and therefore it is not possible to display the operating position by transmitting light from inside to each knob. It was necessary to rely on the illumination light. However, in the case of a single variable resistor,
There was one that displayed light by emitting light from inside the knob, but this had the problem of having to line up many of them, taking up space and consuming a lot of power.

This idea was made in view of these conventional problems, and consists of multiple rotating hollow shafts with a variable resistor at one end and a knob body at the other end mounted on top of each other on the same axis. In a rotary multiple variable resistor, a light source is placed at the last stage of the variable resistor,
A light transmitting body with one end facing the light source and the other end facing the knob body of the innermost rotating hollow shaft is disposed inside the innermost rotating hollow shaft, and the knob body is made of a translucent material and is made of a non-transparent material. A light emitting window is formed on each knob body by covering it with a light-transmitting material, and a tapered reflective part and contact are made between the innermost knob body and the other knob bodies so that the light from the light source reaches the light emitting window. By forming a surface, the purpose is to solve the above problem.

This invention will be explained below based on the drawings.

1 to 6 show an embodiment of the rotary multiple variable resistor of this invention.

First, to explain the structure, 1 in the figure is a knob body made of a translucent material such as acrylic resin.
It is attached to one end of the inner rotating hollow shaft 4. Another knob body 2 similar to the knob body 1 is attached to one end of the outer rotary hollow shaft 3 coaxially assembled with the inner rotary hollow shaft 4. Furthermore, these knob bodies 1 and 2 are made of an insulating material to prevent electrical short circuits.

Reference numeral 5 denotes a bearing for receiving the rotating hollow shafts 3 and 4, and is fixed to the front plate 6. 7 is an insulating spacer,
Reference numerals 8 and 9 designate insulating substrates provided before and after a case 10 that accommodates a slider receiver of a pre-stage variable resistor (not shown) attached to the opposite end of the knob body 2 of the outer rotary hollow shaft 3. Case 1 that stores the front-stage variable resistor and rear-stage variable resistor of a double variable resistor.
A mounting body 11 is provided between 0 and 13 with insulating substrates 9 and 12 interposed therebetween. Further, a case 14 is arranged behind the case 13, and a light source 2 is provided inside the case 14.
1 is housed so that it is located behind the last stage variable resistor. Case 14 housing light source 21
A rear side plate 16 is provided behind the insulating substrate 15, and the bearing is installed by caulking the tip mounting foot 6b of the holding plate 6a extending from the front side plate 6 along the opposite side onto the rear side plate 16. It is fixed at 5. Terminals 1 are provided on the insulating substrates 8, 9, 12, and 15, respectively.
7, 18, 19, and 20 are attached.

The detailed structure of this rotary type double variable resistor is shown in the second section.
To explain with a diagram, a light source 21 disposed inside a case 14 is connected to a terminal 20 with a lead wire 22, and inside the case 13 in front of the case 14 is a sliding shaft fixed to an inner rotating hollow shaft 4 and rotating together. A child receiver 23 is provided. This slider receiver 23 is attached to the slider 2
4, and a projection 13a formed on the case 13 with a stopper 23a formed in a part.
It is designed to be locked. Outer rotating hollow shaft 3
The knob main body 2 is fitted into an enlarged diameter portion 3a formed at the tip of the inner rotary hollow shaft 4, and the knob main body 1 is similarly fitted into an enlarged diameter portion 4a formed at the tip of the inner rotary hollow shaft 4. In the hollow part 26 of the inner rotating hollow shaft 4, there is an optical transmission body 2 such as an optical fiber.
5 has one end 25a facing the light source 21, and the other end 25b
facing the innermost knob body 1 and recessed part 1d.
It is arranged so that it can be inserted into.

On the other hand, as is clear from FIGS. 2 and 5, the knob body 1 has a hole 1a opened on the end surface that faces outside when attached, and a recessed light emitting window 1b for display, and a tapered shape on the back side. Annular reflective part 1
c and a boss portion 1f are formed. Boss part 1
A protruding portion 1e is formed at f to engage with the reduced diameter portion 1g and the split portion 4b so as to fit into the enlarged diameter portion 4a of the inner rotary hollow shaft 4. Tapered reflecting portions 1a' and 1a'' are formed in the hole 1a.

The other knob body 2 is formed with a light emitting window 2b for display recessed outward from the outer diameter of the knob body 1 on the end surface that becomes the outer side when attached, and a tapered annular reflective part 2c is formed on the back side. has been done. moreover,
The knob body 2 has a contact surface 2 that protrudes into the central hole 2d and contacts the outer peripheral surface of the boss portion 1f of the knob body 1.
It has e. When the knob body 1 is coaxially overlapped with another knob body 2, the contact surface 2e
comes into contact with the outer circumferential surface of the boss portion 1f and becomes capable of transmitting light, and the reflective surface 2c is formed at a position corresponding to the reflective surface 1a''.

The knob bodies 1 and 2 include at least the outer periphery and contact surface 2e of the boss portion 1f, and the light emitting windows 1b and 2b.
The rest is covered with a non-transparent material such as paint or an insulating coat. The light emitting windows 1b and 2b may be located at a position where they can be observed from the outside when worn, for example, on the outer peripheral surface,
Furthermore, it may be formed by leaving a portion of the non-light-transmitting member covering without creating a recess. This light emitting window 1b,
2b may be uncolored or appropriately colored, such as red or green, and it is more preferable if the color is different from the color of the non-transparent member. Since it is sufficient that the light from the light emitting windows 1b and 2b is colored, the light source 21 or the light transmission body 25 may be colored.

Next, the effect will be explained.

When the light source 21 is turned on by operating a main switch (not shown), the light from the light source 21 is transmitted to the optical transmission body 2.
5 to the recess 1d of the knob body 1.
The light entering the knob body from the recess 1d is reflected by the tapered reflecting portions 1a' and 1c, as shown in FIG. 6, and exits from the light emitting window 1b as shown by the dashed line.
On the other hand, the light reflected by the tapered reflecting section 1a'' passes through the contact surface 2e, and the light reflected by the tapered reflecting section 1a'' passes through the contact surface 2e.
c and exits from the light emitting window 2b as shown by the two-dot chain line. Tapered reflective portions 1a′, 1a″, 1
c and 2c form annular bands that are part of the cone, so even if the knob bodies 1 and 2 are rotated, the light transmitting body 2
The light from 5 always exits from the light emitting windows 1b and 2b. If the light emitting windows 1b, 2b, etc. are colored, colored light can be observed from the light emitting windows 1b, 2b shown in FIG. Therefore, when the knob bodies 1 and 2 are rotated left and right from FIG. 4 and set to any desired adjustment position, the position can be clearly recognized by the observer.

Note that although a rotating double variable resistor has been described here, the present invention is not limited to this, and a rotating multiple variable resistor may be used.

As explained above, according to this invention, it is possible to transmit light to each knob body using a single light source for multiple variable resistors instead of a single variable resistor, which reduces the size of equipment that uses variable resistors. can do. Since the light from the knob body itself is emitted from the light emitting window, the display becomes clear. Furthermore, it has the advantage of requiring less power consumption.

Further, in an embodiment in which a recess is provided in the knob body, in addition to the above-mentioned common effect, light can be efficiently transmitted without being dispersed.

[Brief explanation of the drawing]

The drawings are all related to the present invention; Fig. 1 is an external side view, Fig. 2 is an enlarged sectional view of the main part of Fig. 1 with some parts omitted, Fig. 3 is an exploded perspective view of the main part, and Fig. 4 is an exploded perspective view of the main part. 2, FIG. 5 is a view corresponding to the - cross section of FIG. 2, and FIG. 6 is a state explanatory diagram showing the passage of light. 1, 2...knob body, 1a', 1a'', 1c, 2
c...Reflection part, 1b, 2b...Light emission window, 1d...
Recessed portion, 2e...contact surface, 3, 4...rotating hollow shaft,
21...Light source, 25...Light transmission body.

Claims (1)

[Claims for Utility Model Registration] (1) A rotary multiple variable resistor in which a plurality of rotary hollow shafts each having a variable resistor at one end and a knob body at the other end are mounted coaxially, A light source is disposed at the last stage of the variable resistor, and an optical transmission body with one end facing the light source and the other end facing the knob body of the innermost rotating hollow shaft is connected to the innermost rotating hollow shaft. The knob body is made of a light-transmitting member and covered with a non-light-transmitting member to form a light emitting window in each knob body, so that the light from the light source reaches the light emitting window. A rotary multiple variable resistor characterized by a tapered reflective part and a contact surface formed between an innermost knob body and another knob body. (2) The rotary multiple variable resistor according to claim 1, wherein the innermost knob body is formed with a recessed portion for accommodating an end portion of the optical transmission body.