| 摘要 |
An keyboard assembly for an electronic musical instrument is mainly constructed by a key frame, a key, a key switch and an assembly guide member. A fixing portion of the key is supported by the key frame such that a front portion of the key can be freely rotated up and down. An actuator is attached to and projected downward from a lower side of the key. The key switch (or a key-depression sensor) has an elastic projecting portion at its upper end. This key switch is provided on the key frame and is driven by the actuator, which depresses down the elastic projecting portion of the key switch when the key is depressed down. The assembly guide member guides the key when the key is moved in an assembling direction (i.e., a longitudinal direction of the key) in order to carry out an assembling operation to assemble the key and the key frame together. Herein, the key is guided by the assembly guide member in such a manner that the actuator does not come in contact with the key switch during the assembling operation. Thus, the key switch is not damaged at all by the actuator during the assembling operation of the keyboard.
|
