Patent ID: 7507883

Claim:
An electronic keyboard instrument comprising: a musical instrument body which is provided with an array of keys at a front portion of the musical instrument body, and side plates at both side portions of the musical instrument body; and a keyboard lid which is mounted in the musical instrument body slidably between a closed position for covering the array of the keys and an open position for exposing the array of the keys, wherein the keyboard lid comprises a front lid section and a rear lid section which is arranged rearward of the front lid section in the closed position, and a connecting part which has connecting pieces respectively provided at the front lid section and the rear lid section to releasably connect the front lid section and the rear lid section to each other, the front lid section is provided with a front lid supporting part at each side end of the front lid section, and the rear lid section is provided with a rear lid supporting part at each side end of the rear lid section, each of the side plates is formed with a guide recess which extends from a front portion of the side plate to a rear portion of the side plate, and which receives the front lid supporting part and the rear lid supporting part to slidably support the keyboard lid, the guide recess comprises a first guide portion which is formed at the front portion of each of the side plates, a second guide portion which extends rearward from a branch point provided at a rear end of the first guide portion, and a third guide portion which extends rearward from the branch point below the second guide portion, under a state where the keyboard lid is placed in the closed position, the front lid supporting part and at least a portion of the rear lid supporting part are received in the first guide portion, and in case that the keyboard lid is shifted to the open position from the closed position, the front lid section moves rearward along the first guide portion together with the rear lid section, and when the rear lid section reaches a rearmost position, the rear lid supporting part is positioned in the second guide portion, while the front lid supporting part moves from the first guide portion to the third guide portion at the branch point according to release of the connection between the front lid section and the rear lid section by the connecting part, and subsequently the front lid section is guided along the third guide portion.