| 摘要 |
An arm 122 is secured on an upper end portion thereof to an output shaft 121 of a reduction gear 120 attached to a motor that is installed under a rest frame 115 on which a mattress is to be mounted. When rollers 123 provided on a lower end portion of the arm 122 are vertically guided along a vertical guide member 124 as the motor rotates forwardly and reversely, the arm 122 begins to swing right and left, thereby causing the rest frame 115 to rock quietly and gently about a rocking axis 115a. As a result of this construction, a rocking bed is provided, in which a motor is downsized and noise is reduced during the operation of a driving force transmission mechanism, and the rest frame for mounting a mattress rocks right and left properly with a simple construction.
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