| 摘要 |
<p>PROBLEM TO BE SOLVED: To bend a leg part against movement of a bed plate part so as to hardly press the back face by a constitution wherein a back bed plate part is connected on one end side of a fixed bed plate part and a leg bed plate part is connected on another end side in freely rising and falling manner and motive power for a back rising driving mechanism is selectively transmitted to the leg bed plate part. SOLUTION: A back rising driving mechanism 51 provided on upper and lower frames 31 transmits rotation of a driving motor 52 to the first rotational shaft 54 and a back bed plate part is pushed up by means of a first rising arm 56 provide thereon and a waist bed plate part 95b is linked thereto to raise the upper half of the body of a user laid down on a mattress. In this instance, if it is needed to bend simultaneously the legs, a lever of a power transmitting mechanism 61 is operated to rotate it at a large diameter part by 90 degrees not so as to slide a top into a slide hole. Under this condition, a second link is interlinked to a first link and the motive power of the driving motor 52 is also transmitted to a second rising arm 57 and a second leg bed plate part 95e is interlinked to a first leg bed plate part 95d to bend it into approximately a chevron shape.</p> |
