| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure sensor for touch control of an electronic keyboard instrument capable of stably operating by equalizing a deforming process of an upper sensor component member. SOLUTION: This pressure sensor has a sensor body 10, a case 14 and a buffer member 15. The sensor body 10 has a strip-like lower sensor component member 11 placed on a bottom wall of the case 14; spacers 12 fixed along both longitudinal side edges on the upper surface of the lower sensor component member 11; and a strip-like upper sensor component member 13 hung and fixed between the top parts of the spacers 12. When a member interlocking with a key presses the buffer member 15 by a keystroke, the upper sensor component member 13 is deformed together with the buffer member 15 and contacts with the lower sensor component member 11 to output a sensor output depending on the contact pressure. Upper walls 142a of the case 14 descend toward the inside in the case width direction from the side wall side of the case 14 such that the upper sensor component member 13 has a curved shape projecting downward in width directional section. |
