1. A touch panel device comprising:
a touch panel that has an operation surface and changes a state of a region on the operation surface in which a touch operation is performed;
a pressure sensor unit to output a pressure detection signal corresponding to a pressing force applied to the operation surface; and
a controller to calculate coordinates of the touch operation on the operation surface based on the state of the touch panel, wherein
the touch operation includes a first touch operation using an operation component displayed on the operation surface and a second touch operation using an operation component displayed on the operation surface,
in a case that the first touch operation is performed, the controller judges that first operation information corresponding to the first touch operation is valid,
in a case that the second touch operation is performed, when a press value of the pressing force indicated by the pressure detection signal is greater than a predetermined threshold pressing force, the controller judges that second operation information corresponding to the second touch operation is valid, and
in a case that the second touch operation is performed, when the press value is less than or equal to the threshold pressing force, the controller judges that the second operation information is invalid.
2. The touch panel device according to claim 1, wherein
the operation component includes a slide bar,
the slide bar includes a bar part, a lengthwise direction of which corresponds to an input value, and a slider that moves along the bar part,

the bar part includes a first-stage part and a second-stage part, and
when the slider is pressed with a pressing force at a press value greater than the threshold pressing force at a position of a boundary value between the first-stage part and the second-stage part, the controller judges that the second operation information corresponding to the second touch operation is valid.
3. The touch panel device according to claim 1, wherein
the operation component includes a slide bar,
the slide bar includes a bar part, a lengthwise direction of which corresponds to an input value, and a slider that moves along the bar part,
the bar part includes a first-stage part and a second-stage part,
the first-stage part and the second-stage part are arranged at different positions in a direction orthogonal to the lengthwise direction, and
when the second touch operation of pressing the slider with a pressing force at a press value greater than the threshold pressing force at a position of a boundary value between the first-stage part and the second-stage part and sliding the slider in the direction orthogonal to the lengthwise direction is performed, the controller judges that the second operation information corresponding to the second touch operation is valid.
4. The touch panel device according to claim 1, wherein
the operation component includes a slide bar,
the slide bar includes a bar part, a lengthwise direction of which corresponds to an input value, and a slider that moves along the bar part,
the bar part includes a first-stage part and a second-stage part,
the operation component further includes a fixed region arranged around a position of a boundary value between the first-

stage part and the second-stage part, and
when the second touch operation is performed by pressing the slider with a pressing force at a press value greater than the threshold pressing force while touching the fixed region, the controller judges that the second operation information corresponding to the second touch operation is valid.
5. The touch panel device according to any one of claims 2 to
4, wherein the controller has a locked state of disabling an
operation on the slide bar and an unlocked state of permitting the
operation on the slide bar.
6. The touch panel device according to claim 1, wherein
the operation component includes a numerical input
component,
the numerical input component includes a first increment button for increasing an input value by the first touch operation, a first decrement button for decreasing the input value by the first touch operation, a second increment button for increasing the input value by the second touch operation, and a second decrement button for decreasing the input value by the second touch operation, and
when the second touch operation is performed by pressing the second increment button or the second decrement button with a pressing force at a press value greater than the threshold pressing force, the controller judges that the second operation information corresponding to the second touch operation is valid.
7. The touch panel device according to claim 1, wherein
the operation component includes a numerical input
component,
the numerical input component includes a first increment button for increasing an input value by the first touch operation, a first decrement button for decreasing the input value by the first touch operation, a second increment button for increasing

the input value by the second touch operation, and a second decrement button for decreasing the input value by the second touch operation,
the controller displays the second increment button when the first touch operation is performed by pressing the first increment button with a pressing force at a press value greater than the threshold pressing force and displays the second decrement button when the first touch operation is performed by pressing the first decrement button with a pressing force at a press value greater than the threshold pressing force, and
when the second touch operation is performed by pressing the second increment button or the second decrement button with a pressing force at a press value greater than the threshold pressing force, the controller judges that the second operation information corresponding to the second touch operation is valid.
8. The touch panel device according to claim 1, wherein
the operation component includes a numerical input component,
the numerical input component includes a first increment button for increasing an input value by the first touch operation, a first decrement button for decreasing the input value by the first touch operation, a second increment button for increasing the input value by the second touch operation, and a second decrement button for decreasing the input value by the second touch operation,
the controller displays the second increment button when the first touch operation is performed by pressing the first increment button with a pressing force at a press value greater than the threshold pressing force and displays the second decrement button when the first touch operation is performed by pressing the first decrement button with a pressing force at a press value greater than the threshold pressing force, and
the controller judges that the second operation information corresponding to the second touch operation as a swipe operation

is valid when a swipe operation heading from the first increment button to the second increment button or a swipe operation heading from the first decrement button to the second decrement button is performed with a pressing force at a press value greater than the threshold pressing force.
9. The touch panel device according to claim 1, wherein
the operation component includes a dial button on which a rotation operation is performed, and
when the second touch operation is performed by rotating the dial button while the dial button is pressed with a pressing force at a press value greater than the threshold pressing force, the controller judges that the second operation information corresponding to the second touch operation is valid.
10. The touch panel device according to claim 1, wherein
the operation component includes a valve on which a rotation operation is performed with a plurality of fingers,
the valve has an initial position,
an operation of rotating the valve a certain number of times from the initial position is the second touch operation and an operation of rotating after the rotation of the certain number of times is the first touch operation, and
when the second touch operation is performed by rotating the valve while pressing the valve with a pressing force at a press value greater than the threshold pressing force, the controller judges that the second operation information corresponding to the second touch operation is valid.
11. The touch panel device according to claim 1, wherein
the operation component includes a lever that switches
between a first position and a second position, and
when the second touch operation is performed by sliding the lever while pressing the lever with a pressing force at a press value greater than the threshold pressing force or when an

operation of sliding the lever while pressing the lever with a pressing force at a press value greater than the threshold pressing force is performed a predetermined specific number of times, the controller judges that the second operation information corresponding to the second touch operation is valid.
12. The touch panel device according to claim 1, wherein
the operation component includes a breaker switch that
switches between an ON state and an OFF state, and
when the second touch operation is performed by sliding the breaker switch from the OFF state to the ON state while pressing the breaker switch with a pressing force at a press value greater than the threshold pressing force or when an operation of sliding the breaker switch from the OFF state to the ON state while pressing the breaker switch with a pressing force at a press value greater than the threshold pressing force is performed a predetermined specific number of times, the controller judges that the second operation information corresponding to the second touch operation is valid.
13. The touch panel device according to claim 12, wherein an
operation of sliding from the ON state to the OFF state is the
first touch operation.
14. The touch panel device according to claim 12 or 13, wherein
the operation component further includes a cover that
surrounds the breaker switch and slides between a closed position and an open position, and
the controller permits an operation on the breaker switch only when the cover is at the open position.