JPS6218005A - Rotary operation type variable resistor with light source display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to improvements in rotary-operable variable resistors used in consumer equipment sets such as video equipment and audio equipment. The rotation angle position of
This invention relates to a rotary-operable variable resistor with a light source display that displays using light from a light source such as an IED.

BACKGROUND OF THE INVENTION A conventional rotary-operable variable resistor with a light source display is known, for example, as disclosed in Japanese Utility Model Application Publication No. 193603/1983, and the schematic structure thereof is shown in [[Fig. 6]]. It is.

In [Fig. 6], person is the knob part, B is the shaft part, C is the variable resistor part, D is the light source part. and a second light guide 2 arranged such that the other end 2b is in front of the knob 1 away from the center of rotation, and the shaft part B has one end 3a connected to the rotating body 5 of the variable resistor part C. edge 3
b is a hollow shaft 3 connected to the knob 1, and this hollow shaft 3
The variable resistor part C consists of a rotary body 5 rotated by the hollow shaft 3, and a rotary body 5 which is held by the rotary body 5 and is printed on the surface of a resistance board 6. A light source consisting of a slider 8 that rotates and slides on a multi-layered resistance element 7, a terminal 9 for external connection, and a case 1o that houses these, and further has an input terminal 11 in the light source section. The body 12, its storage cases 13, 14, and one end 15a are arranged on the light source body 12 through the hollow shaft 3 so that the other end 15b faces the one end 2a of the second light guide 2. 1 light guide 16.

In this configuration, when the knob 1 is rotated, the slider 8 held on the rotating body 5 via the hollow shaft 3 is rotated and slid on the resistance element 7, and the terminals 9 and 9'(9' is not shown). figure)
At this time, the second guide tip 2b on the front surface of the knob 1 also rotates, and the light emitted from the light source 12 is emitted from the first light guide 16 and the second light guide 2. The light guided to the second guide tip 2b on the front surface of knob 1 through
That is, the set resistance value of the variable resistor/container section C) is displayed as shown in FIG.

Problems to be Solved by the Invention In the conventional configuration as described above, the position of the light source body 12 and its light emitting display section are separated from the rear end and front end of the variable resistor, so there is no space for transmitting light between them. A first light guide 15 and a second light guide 2 are required, and while the light is transmitted from the light source body 12 to the first light guide 16 to the second light guide 2 → the front surface of the knob 1, The drawback was that the light became faint and weak due to diffusion.

In addition, if a problem occurs with the light source 12 after installing this rotary-operable variable resistor with light source display in a set, or if you want to change the color or brightness of the light source 12, you can use the light source 12.
Even if one wanted to replace the light source body 12, it was impossible to change only the light source body 12, and the entire rotary-operable variable resistor with light source display had to be removed and converted.

Furthermore, in the case of this configuration, it is difficult to add the function of enlarging the knob (operating shaft) 1 in addition to the rotating operation.

The present invention aims to eliminate the above-mentioned conventional drawbacks, and provides a rotary-operable variable resistor with a light source display that facilitates the replacement of the light source body and prevents light attenuation.

Means for Solving the Problems The present invention provides a light source current collector (sliding contact) in front of the resistance element substrate of a rotary variable resistor with a light source display, and electrically connects the sliding contact with the current collector for the light source. The above-mentioned problem is attempted to be solved by providing a conductive light source socket section on the front surface of the variable resistor.

Function: By providing a light source socket on the front surface of the rotary variable resistor, the light source body can be mounted directly on the front surface of the variable resistor, that is, facing the operating knob.

Example Hereinafter, embodiments of the present invention will be explained using the drawings.

[Fig. 1] shows the implementation row of the rotary-operable variable resistor with light source display according to the present invention. In the figure, E is the display part, F is the current collector part for the light source, G is the variable resistor part, and H is the It is a push type switch part.

The display section E has a light source housing hole 21 and a display front window 22 that is continuous with the light source housing hole 21 and is filled with transparent resin.
Knob 2 whose center is inserted and coupled to the front end of the operating shaft 238L
4, and a light source rotating body 25 made of an insulating material such as synthetic resin.
The light source body 27 is inserted into the socket hole 26 from the front side, and the tip light emitting part is exposed in the light source housing hole 21 of the knob 24.
As shown in FIG. 2, the light source current collector F consists of two concentric fixed contacts 28, 29 and an input terminal 28a to these contacts.
. Hole 26 of rotating body 25 for light source
' and extends to the socket hole 26, and the light source body 270
Two movable contact bodies 35 and 36 have elastic legs 35a and s6a that are pressure-connected to the input terminals 33 and 34 using elasticity, respectively, and are made of synthetic resin and have a light source socket hole 26 on the front side. At the same time, the two movable contact bodies 35 and 36 are held on the rear side, and the central non-circular hole 37 has an operating shaft intermediate portion 23b having the same external shape as shown in FIG.
and a rotary body 25 which is loosely fitted and whose outer diameter is rotatably supported by a bearing 38 at its intermediate cylindrical portion 25a.

The variable resistor G is located at the rear of the light source current collector F, and includes a slider holder 39 into which the operating shaft intermediate non-circular portion 23b is loosely fitted, and a resistor element 41 held by the slider holder 39 on the resistor board 4o. Slider 42 rotating and sliding on top and terminal 43.4 for external connection
3'(43' is not shown) and a case 44 that accommodates them.Furthermore, the push-type switch part H is activated by pushing the drive body 46 that is in contact with the rear end 230 of the operating shaft 23. Between the external terminals 46 and 47 (47 is not shown)
Since this is a general type that opens and closes electrically, a description of its internal structure will be omitted.

In this configuration, when the knob 24 is rotated, the light source rotating body 25 and the variable resistor slider holder 39 are rotated via the operating shaft 23, and the two light source movable contact bodies 35.3
The sliding contact portions 31 and 32 of 6 rotate and slide on the concentric fixed contacts 28 and 29, respectively, and the elastic leg portions 35a,
Since the current is supplied to the input terminals 33 and 34 of the light source body 27 through the input terminals 36a, the light source body 27 is always turned on while the knob 24 is turned on.
rotates with. At this time, the resistance value between the external connection terminals 43 and 43' of the variable resistor section G changes as in the conventional array.

Furthermore, when the knob 24 is pressed, the operating shaft 23 is loosely fitted into the holes of the light source rotating body 25 and the variable resistor slider holder 39, so it moves forward and backward regardless of these rotating bodies 25 and 39. movement, pushing the drive body 45 of the push-type switch with the rear end 230 and pushing the push-type switch terminal 46.47
When opening and closing between the light source body 27 and the red light source cylindrical part 25
An appropriate space is provided inside each knob 24 so that the tip of the ia does not hit the knob 24.

Further, as shown in FIG. 4, when the knob 24 is not attached, the light source body 27 is exposed at the front, and the light source body 27 cannot be inserted from the front.
Its input terminal 33 is connected by the elastic legs 352L, 36& of
．． Since the light source body 27 is connected by pressure contact, the light source body 27 can be attached and detached even after this rotary-operable variable resistor with light source display is attached to the set. In other words, if you want to convert the light source 27 later, please use the knob 2.
The light source body 27 can be replaced by simply removing 4.

Furthermore, in addition to the rotation operation of the knob 24, a push switch that can be pushed or pulled back and forth can be added.

In this case, as shown in FIG. 6, the light source rotating body 25 and the variable resistor slider holder 39 are connected to rotate together, and the center hole 25' of the light source rotating body 25 is The rotary movement of the operating shaft 23 is prevented by making it circular so that the movement of the operating shaft 23 is not directly transmitted, and only the fitting between the variable resistor slider holder 39 and the operating shaft 23 is a loose fit between the non-circular hole and the non-circular shaft. If the configuration is such that the information is transmitted to the light source rotating body 25 via the slider holder 39, the movement of the operating shaft 23 in the front-rear direction becomes smoother.

Effects of the Invention The present invention is constructed as described above, and since the light source socket is provided on the front surface of the rotary variable resistor, the light source body emits light at the frontmost surface of the variable resistor, that is, within the operating knob. can be done. Therefore, there is no need for a long light guide to transmit light as in the conventional system, and there is almost no attenuation of brightness due to diffusion during light guide.

In addition, when the knob is not attached, the light source is exposed at the front, and since the light source is connected by inserting it from the front, a rotary variable resistor with a light source display is attached to the set. The light source body can be attached and detached even after it has been removed. That is, if you want to replace the light source after it has been installed, you can do so simply by removing the knob.

Furthermore, as is clear from the examples, it is extremely easy to add a push switch that operates back and forth (push/pull) in addition to the rotation operation of the knob (operating shaft).

As described above, the present invention is very practical and has high utility value.

[Brief explanation of the drawing]

FIG. 11 is a side sectional view of an embodiment of the rotary variable resistor with a light source display according to the present invention, FIG. 2 is a plan view of the contact board for the light source, and FIG. 3 is a plan view of the rotating body for the light source. Figure 4 is a diagram of the same set installed, Figure 6 is a side sectional view of another implementation row of the present invention, Figure 6 is a side sectional view showing the conventional row, and Figure 7 shows the display state of the same knob. FIG. 21...Light source storage hole, 22...Front display window, 23...Operation axis, 24...
Knob, 25...Rotator for light source, 26...
...Socket hole, 27...Light source, 28.29
. . . Concentric fixed contact, 3o . . . Contact substrate, 31. 32 . . . Sliding elastic contact portion, 33.
34...Input terminal, 35.36...Movable contact body, 37...Central non-circular hole, 38...
...Bearing, 39...Sliding holder, 4o...
...Resistance board, 41...Resistance element, 42...
...Slider, 43...Terminal, 44...
... Case, 45 ... Drive body, 46.47
...Terminal. Name of agent: Patent attorney Toshio Nakao and 1 other person28
．． 29--%H total ir5mp,,

Claims (4)

[Claims] (1) A contact board having two concentric fixed contacts is provided on the front side of the resistance element board of a rotary-operated variable resistor having an operating shaft on the front side, and a contact board having two concentric fixed contacts is separately contacted ( A light source rotating body made of an insulating material holding two movable contacts (sliding contact) is fitted in its central hole so as to rotate together with the operating shaft, and a light source rotating body provided on the front surface of the light source rotating body A sliding elastic contact terminal electrically connected to each of the two movable contacts is disposed in the light source socket hole, a light source body is connected to this terminal, and a knob having a front window for display is provided on the operating shaft. A rotary-operable variable resistor with a light source display, characterized by combining the following. (2) The operating shaft is fitted loosely between the slider holder of the variable resistor and the central hole of the light source rotor and the shaft of the same shape and external shape, and the rotational movement of the operating shaft is limited to the rotational movement of the operating shaft. 2. The rotary-operable variable resistor with a light source display according to claim 1, which is structured to transmit motion to the slider holder and the rotating body, but not to transmit motion in the axial direction. (3) The slider holder of the variable resistor and the light source rotor are connected so that they rotate together, and the center hole of the light source rotor is circular so that the motion of the operating shaft is not directly transmitted, and the slider holder of the variable resistor is connected so that they rotate together. The slider holder is characterized in that only the fitting between the slider holder and the operating shaft is a loose fitting between a non-circular hole and the same-shaped outer shaft, so that the rotational motion of the operating shaft is transmitted to the rotating body through the slider holder. A rotary-operable variable resistor with a light source display according to claim 1. (4) A rotary-operable variable resistor with a light source display as set forth in claim 1, characterized in that a push-type switch operated by the forward and backward movement of an operating shaft is disposed on the rear side of the variable resistor.