JP2500625B2 - Double knob - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double knob, and more particularly to a double knob for a dual axis structure of a variable resistor and a variable attenuator and a rotary switch.

[0002]

2. Description of the Related Art Conventionally, in this type of double knob,
As shown in FIGS. 7 and 8, the lower knob 1 is fixed to the lower shaft 8a of the double variable resistor 8 with the screw 7a. An upper knob 9 is fixed to the upper shaft 8b having the same rotation center as the lower shaft 8a with a screw 7b.

Since the lower shaft 8a and the upper shaft 8b have a biaxial structure, the lower shaft 8a and the upper shaft 8b can rotate independently of each other. Therefore, by rotating the lower knob 1 and the upper knob 9 independently, the lower shaft 8a and the upper shaft 8 are rotated.
Each of b rotates independently.

The double knob having the above-mentioned structure is used not only in the double variable resistor 8 but also in the double variable attenuator and the rotary switch.

On the other hand, there is also a dual variable resistor, variable attenuator, and rotary switch having a two-axis structure itself having a simultaneous rotation function. In this case, by rotating the lower knob and the upper knob at the same time, the lower shaft and the upper shaft rotate at the same time.

[0006]

Some of the above-described conventional double knobs have a dual rotary resistor, a variable attenuator, and a two-axis structure of a rotary switch having a simultaneous rotation function. In a general two-axis structure of a variable resistor and a variable attenuator and a rotary switch, there is no one that can simultaneously rotate the lower shaft and the upper shaft by the function of the double knob.

Further, when the biaxial structure itself of the variable resistor and the variable attenuator and the rotary switch in series has the simultaneous rotation function, the biaxial structure itself becomes a complicated structure.

Therefore, an object of the present invention is to solve the above problems and to provide a dual shaft structure in which a lower shaft and an upper shaft can be simultaneously rotated in a biaxial structure of a double variable resistor or variable attenuator and a rotary switch. To provide a knob.

[0009]

The double knob according to the present invention is a double knob including first and second knobs for independently rotating first and second rotary shafts having the same center of rotation. The inner core and the front fixed to the second knob
Through the elongated hole provided in the inner core and the elongated hole, the second
A fixing member for fixing the second knob to the second rotating shaft, the fixing member being composed of a screw member fixed to the rotating shaft and being movable in the axial direction of the second rotating shaft; Between the knobs and the second knob is the first
And an insulator having a large friction coefficient for transmitting the rotation of the second knob to the first knob when it is moved to the knob side. Other double knobs according to the present invention are each
First and second rotations with the same center and different shaft diameters
From the first and second knobs that rotate the rotary shaft independently
Which is fixed to the second knob.
Through the inner core and the long hole provided in the inner core and the long hole
A screw member fixed to the second rotating shaft, and
The second knob is movable in the axial direction of the second rotary shaft.
A fixing member for fixing the groove to the second rotating shaft;
And a second knob arranged between the second knob and the second knob.
When the second knob is moved to the first knob side.
The friction coefficient for transmitting the rotation of the Mi to the first knob is large.
And an insulator.

[0010]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view of an embodiment of the present invention, and FIGS. 2 and 3 are side views including a partial cross section of the embodiment of the present invention. In these figures, the double variable resistor 8 has two axes, a lower shaft 8a and an upper shaft 8b, and the lower knob 1 has a screw 7 attached to the lower shaft 8a.
It is fixed at a.

Further, the internal knob 3 is provided on the upper shaft 8a.
Are fixed with screws 7b. The screw portion of the inner core 2a of the outer knob 2 and the screw hole portion of the disc 5 are screwed to each other with the inner knob 3 interposed therebetween.

Further, since the spring 4 is arranged between the inner knob 3 and the outer knob 2, the spring 4 urges the outer knob 2 in a direction opposite to the inner knob 3.
As a result, the disc 5 is brought into contact with the internal knob 3. An insulator 6 having a large friction coefficient is attached to the surface of the disk 5 on the variable resistor 8 side.

Attach the inner knob 3 to the upper shaft 8a with a screw 7
When fixing with b, the screw hole of the inner knob 3 is aligned with the long hole 2b provided in the inner core 2a of the outer knob 2, and the screw 7b is screwed into the screw hole of the inner knob 3 in that state.

As a result, the screw 7a is pressed against the upper shaft 8a through the elongated hole 2b of the inner core 2a, and the inner knob 3 is fixed to the upper shaft 8a. In this case, since the external knob 2 is not directly fixed to the upper shaft 8a by the screw 7a, the upper shaft 8a can freely move in the axial direction.

As described above, the lower knob 1 and the inner knob 3 are attached to the lower shaft 8a and the upper shaft 8b by screws 7
By fixing with a and 7b, it is possible to independently rotate the lower knob 1 and the outer knob 2 to rotate the lower shaft 8a and the upper shaft 8b independently (see FIG. 2).

That is, by rotating the lower knob 1, the lower shaft 8a rotates independently of the upper shaft 8b. Further, by rotating the outer knob 2, the screw 7b for fixing the inner knob 3 to the upper shaft 8b is pushed in the rotational direction by the elongated hole 2b, so that the upper shaft 8
b rotates independently of the lower shaft 8a.

On the other hand, when the lower shaft 8a and the upper shaft 8b are simultaneously rotated, the outer knob 2 is pressed against the variable resistor 8 side so that the disc 5 is moved by the movement of the inner core 2a. And the insulator 6 is pressed against the lower knob 1 to be in close contact (see FIG. 3).

In this state, when the external knob 2 is rotated, the insulator 6 rotates and the friction resistance of the insulator 6 causes the lower knob 1 to rotate. Simultaneous rotation of the external knob 2 and the lower knob 1 causes the lower shaft 8a and the upper shaft 8b to rotate simultaneously.

FIG. 4 is an exploded perspective view of another embodiment of the present invention, and FIGS. 5 and 6 are side views including a partial cross section of another embodiment of the present invention. In these figures, the other embodiment of the present invention has the same configuration as that of the first embodiment of the present invention except that the diameter of the upper shaft 8c of the variable resistor 8 of the double series is smaller than the diameter of the lower shaft 8a. Therefore, the same components are designated by the same reference numerals. The operation of the same component is the same as that of the embodiment of the present invention.

As in another embodiment of the present invention, the variable resistor 8
When the lower shaft 8a and the upper shaft 8c have different diameters, the difference in diameter is dealt with by reducing the inner diameter of the inner core 2a of the outer knob 2.

In this way, when the outer knob 2 is attached so as to be movable in the axial direction of the upper shafts 8b and 8c, and the outer knob 2 is moved to the lower knob 1 side between the outer knob 2 and the lower knob 1. By transmitting the rotation of the external knob 2 to the lower knob 1 via the insulator 6, the biaxial structure of the variable resistor 8 of a double structure by a double knob composed of the lower knob 1 and the external knob 2 has a simple structure. It is possible to simultaneously rotate the lower shaft 8a and the upper shaft 8b forming the shaft.

Although the double variable resistor 8 is described in one embodiment and another embodiment of the present invention, it is obvious that the present invention can be applied to a double variable attenuator, a rotary switch and the like. Not limited.

[0024]

As described above, according to the present invention, in the double knob including the first and second knobs for independently rotating the first and second rotary shafts having the same center of rotation, respectively, The second knob is fixed to the second rotary shaft so as to be movable in the axial direction of the second rotary shaft, and when the second knob moves to the first knob side, the rotation of the second knob is transmitted. By transmitting to the first knob with the member, there is an effect that the lower shaft and the upper shaft can be simultaneously rotated in the biaxial structure of the variable resistor and the variable attenuator in series, and the rotary switch.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a side view including a partial cross section of one embodiment of the present invention.

FIG. 3 is a side view including a partial cross section of an embodiment of the present invention.

FIG. 4 is an exploded perspective view of another embodiment of the present invention.

FIG. 5 is a side view including a partial cross section of another embodiment of the present invention.

FIG. 6 is a side view including a partial cross section of another embodiment of the present invention.

FIG. 7 is an exploded perspective view of a conventional example.

FIG. 8 is a side view including a partial cross section of a conventional example.

[Explanation of symbols]

 1 Lower knob 2 External knob 2a Inner core 2b Slot 3 Inner knob 4 Spring 5 Disc 6 Insulator 7a, 7b Screw 8 Double variable resistor 8a Lower shaft 8b Upper shaft

Claims (2)

(57) [Claims] 1. A double knob composed of first and second knobs for independently rotating first and second rotary shafts having the same center of rotation, respectively. The double knob is fixed to the second knob.
Through the inner core and the long hole provided in the inner core and the long hole
A fixing member comprising a screw member fixed to the second rotating shaft and fixing the second knob to the second rotating shaft so as to be movable in the axial direction of the second rotating shaft. And the first
And a second knob, which has a large friction coefficient for transmitting the rotation of the second knob to the first knob when the second knob moves to the first knob side .
A double knob having an insulator . 2. The rotation centers are the same, and the shaft diameters are the same.
The first and the second rotating shafts, which are different from each other, are independently rotated.
A double knob comprising a first knob and a second knob, wherein:
The inner core fixed to the second knob and the inner core
Fixed to the second rotating shaft through the slot and the slot
A screw member and is movable in the axial direction of the second rotating shaft.
Movably fixed the second knob to the second rotary shaft.
Is provided between the fixing member and the first and second knobs.
And the second knob moves to the side of the first knob.
Rotation of the second knob to the first knob when
Characterized by having an insulator with a large friction coefficient to be transmitted,
Double knob to do.