| 摘要 |
<p>PURPOSE: To provide a link structure of a bedstead part actuating mechanism in a bed or the like, which can be supplied to improve driving force changed by a displacement condition of a bedstead part. CONSTITUTION: In a bedstead part actuating mechanism 10, the mechanism has a motor 11, a screw shaft 12 connected to an output shaft of the motor 11 and a starting shaft 13 to move so as to extend and contract in the shaft direction from the screw shaft 12 in a driving source, and is composed of a driving arm 15 of a link 14 connected to the tip of the starting shaft 13 and an actuating arm 16 connected to the bedstead part side. A spring member 17 is installed on the stating shaft 13 so as to energize the actuating arm 16 of the link 14 in the direction for rising against a load. An angleγformed by the driving arm 15 of the link 14 and the actuating arm 16 is set at 105 deg.. Therefore, when the spring member is installed, output torque becomes almost constant regardless of a displacement condition of a floor part, and a change in the output torque can be restrained more than one to which an existing link is applied.</p> |
