Abstract: Keys for an electronic musical instrument which is capable of giving an after-touch effect is disclosed. If a key is pressed, the point contact rubber is also pressed to point-contact-operate the circuit board, and at the same time, the point contact pin of the key is contacted with the point contact rubber, so that its contact with the circuit board should be transmitted to the hand of the player in the form of an after-touch effect.

Abstract: A C.music-sharp. key roller for the foot tube of a flute is disclosed which is constructed such that a connector shaft hole within the connector is made in the form of a through hole by additionally providing an extended threaded through portion, and the opposite ends of the said through hole are fitted with an auxiliary bolt and with the leading end of the roller shaft, thus forming a double lock system. With this arrangement, the setting of the gap between the roller and connector during assembly is made easy, the loosening of the thread portions is prevented, and resetting is made possible upon the wearing-out of the sliding portion of the roller and the roller shaft.