Rocking bed
AssigneeKabushiki Kaisha Nihon M.D.M.
InventorsYasuo Watanabe, Kojiro Hamano
Life of this patent
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Abstract
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.
Claims6
A rocking bed comprising:
- a base frame;
- struts respectively erected at both end portions of said base frame;
- a rest frame for mounting a mattress thereon, which is supported on upper end portions of said struts in a manner rockable right and left;
- and
- a driving mechanism for rocking said rest frame;
- wherein said driving mechanism comprises:
- a motor installed under said rest frame;
- a reduction gear coupled to a rotating shaft of said motor;
- an output shaft projecting from said reduction gear in parallel with a rocking axis of said rest frame below said rocking axis;
- an arm having an upper end portion thereof secured to a distal end of said output shaft to be vertically suspended when said rest frame is in a horizontal position;
- a vertical guide member provided on said base frame for guiding a guided member provided on a lower end portion of said arm only vertically;
- and
- a motor control section for rotating said motor forwardly and reversely so that forward and reverse rotations of said output shaft allow said rest frame to rock right and left.
Dependencies are inferred from the claim text.