| 摘要 |
PROBLEM TO BE SOLVED: To make it easy to mount keys on a key frame.SOLUTION: A key frame is provided with frame side guide members 14, and a key is provided with a key side guide member 24. The frame side guide member 14 is formed in a rectangular parallelepiped shape, and a front surface 14a is provided with a groove 14f. The key side guide member 24 includes: right and left side walls 24b, 24c extending backward from both right and left ends of a front wall 24a; and a protrusion 24d extending backward from a middle position in a right and left direction of the front wall 24a. The groove 14f and the protrusion 24 form a key guide part for guiding oscillation of the key in a vertical direction during key pressing and releasing operations. Right and left side surfaces 14c, 14d of the frame side guide member 14 and the right and left side walls 24b, 24c form a pre-guide part for guiding mounting operations of the key to the key frame until the key guide part is made functional.SELECTED DRAWING: Figure 9 |
