Operating device

1. An operating device, comprising:

a first rotation operating knob which is rotated centered on a rotation axis extending in a front-back direction,

a second rotation operating knob which is positioned on an exterior side in a rotation diameter direction of the first rotation operating knob and which is rotated centered on the rotation axis shared with the first rotation operating knob,

a holding member which is interposed between the first rotation operating knob and the second rotation operating knob and which includes a tubular rotation operating knob holder holding the first rotation operating knob and the second rotation operating knob such that both are capable of mutually independent rotation,

a first switch element which outputs a signal corresponding to a rotation amount of the first rotation operating knob, and

a second switch element which outputs a signal corresponding to a rotation amount of the second rotation operating knob, wherein

the rotation operating knob holder comprises:

an inner circumferential surface including a first support surface having a substantially circular tubular shape centered on the rotation axis, and

an outer circumferential surface including a second support surface having a diameter larger than the first support surface and having a substantially circular tubular shape centered on the rotation axis;

the first rotation operating knob comprises:

first switch operators provided at a plurality of positions aligned in a rotation circumference direction of the first rotation operating knob and causing the first switch element to output a first detection signal each time one of the first switch operators passes a position opposite the first switch element, and

an outer circumferential surface including a first sliding surface having a substantially circular tubular shape and capable of sliding over the first support surface in the rotation circumference direction; and

the second rotation operating knob comprises:

second switch operators provided at a plurality of positions aligned in the rotation circumference direction of the second rotation operating knob and causing the second switch element to output a second detection signal each time one of the second switch operators passes a position opposite the second switch element, and

an inner circumferential surface including a second sliding surface having a substantially circular tubular shape and capable of sliding over the second support surface in the rotation circumference direction.

2. The operating device according to claim 1 , wherein the operating device further comprises a circuit board positioned to the rear of the first rotation operating knob and the second rotation operating knob, wherein

the holding member is fixated on the circuit board, the first switch element is mounted on a portion further inward on the circuit board than the first support surface of the rotation operating knob holder, and the second switch element is mounted on a portion further outward on the circuit board than the second support surface of the rotation operating knob holder.

3. The operating device according to claim 2 , wherein the first switch element comprises:

a first detector head, which is positioned to the rear of the first switch operators and which is operated in the rotation circumference direction of the first rotation operating knob by the first switch operators each time one of the first switch operators passes during rotation of the first rotation operating knob; and

a first switch element main body outputting the first detection signal each time the first detector head is operated;

and

the second switch element comprises:

a second detector head, which is positioned to the rear of the second switch operators and which is operated in the rotation circumference direction of the second rotation operating knob by the second switch operators each time one of the second switch operators passes during rotation of the second rotation operating knob; and

a second switch element main body outputting the second detection signal each time the second detector head is operated.

4. The operating device according to claim 2 , further comprising:

a pressure operating knob, which receives a pressure operation in an orientation approaching the circuit board so as to be displaced in an orientation approaching the circuit board along a direction parallel to the rotation axis; and

a pressure switch element, which is mounted on the circuit board and which outputs a pressure detection signal by receiving a pressure force from the pressure operating knob which has received a pressure operation and been displaced, wherein

the first rotation operating knob has a centrally hollow shape having an interior surface surrounding the rotation axis, and

the pressure operating knob is held by the holding member in a state positioned within a space bounded by the interior surface of the first rotation operating knob.

5. The operating device according to claim 4 , wherein the holding member further comprises, a pressure operating knob holder which is positioned on an interior of the rotation operating knob holder and holds the pressure operating knob so as to be capable of sliding in a pressing direction of the pressure operating knob.

6. The operating device according to claim 1 , wherein

the first rotation operating knob includes a first dial capable of being gripped for rotation,

the second rotation operating knob includes a second dial having a substantially circular tubular shape positioned further outward than the first dial and capable of being gripped for rotation, and

the first dial is positioned further forward than the second dial in a direction along the rotation axis.

7. The operating device according to claim 3 , further comprising:

a pressure operating knob, which receives a pressure operation in an orientation approaching the circuit board so as to be displaced in an orientation approaching the circuit board along a direction parallel to the rotation axis; and

a pressure switch element, which is mounted on the circuit board and which outputs a pressure detection signal by receiving a pressure force from the pressure operating knob which has received a pressure operation and been displaced, wherein

the first rotation operating knob has a centrally hollow shape having an interior surface surrounding the rotation axis, and

the pressure operating knob is held by the holding member positioned within a space bounded by the interior surface of the first rotation operating knob.

8. The operating device according to claim 7 , wherein the holding member further comprises, a pressure operating knob holder which is positioned on an interior of the rotation operating knob holder and holds the pressure operating knob so as to be capable of sliding in a pressing direction of the pressure operating knob.

9. The operating device according to claim 2 , wherein

the first rotation operating knob includes a first dial capable of being gripped for rotation,

the second rotation operating knob includes a second dial having a substantially circular tubular shape positioned further outward than the first dial and capable of being gripped for rotation, and

the first dial is positioned further forward than the second dial in a direction along the rotation axis.

10. The operating device according to claim 3 , wherein

the first rotation operating knob includes a first dial capable of being gripped for rotation,

the second rotation operating knob includes a second dial having a substantially circular tubular shape positioned further outward than the first dial and capable of being gripped for rotation, and

the first dial is positioned further forward than the second dial in a direction along the rotation axis.

11. The operating device according to claim 4 , wherein

the first rotation operating knob includes a first dial capable of being gripped for rotation,

the second rotation operating knob includes a second dial having a substantially circular tubular shape positioned further outward than the first dial and capable of being gripped for rotation, and

the first dial is positioned further forward than the second dial in a direction along the rotation axis.

12. The operating device according to claim 5 , wherein

the first rotation operating knob includes a first dial capable of being gripped for rotation,

the second rotation operating knob includes a second dial having a substantially circular tubular shape positioned further outward than the first dial and capable of being gripped for rotation, and

the first dial is positioned further forward than the second dial in a direction along the rotation axis.

13. The operating device according to claim 7 , wherein

the first rotation operating knob includes a first dial capable of being gripped for rotation,

the second rotation operating knob includes a second dial having a substantially circular tubular shape positioned further outward than the first dial and capable of being gripped for rotation, and

the first dial is positioned further forward than the second dial in a direction along the rotation axis.

14. The operating device according to claim 8 , wherein

the first rotation operating knob includes a first dial capable of being gripped for rotation,

the second rotation operating knob includes a second dial having a substantially circular tubular shape positioned further outward than the first dial and capable of being gripped for rotation, and

the first dial is positioned further forward than the second dial in a direction along the rotation axis.