Chair-type massage machine

Abstract

The invention provides a chair-type massage machine comprising a backrest and a seat which can be reclined by a single drive source while permitting the user to hold a relaxed posture. The chair-type massage machine comprises a backrest ( 20 ) for the back of the user to bear on, a seat ( 30 ) for the user to sit in, and a reclining mechanism ( 40 ) for pivotally moving the backrest ( 20 ) and the seat ( 30 ). The reclining mechanism ( 40 ) comprises a single drive source ( 42 ), the drive source being coupled to the backrest ( 20 ) and the seat ( 30 ) by a link assembly ( 50 ). The link assembly is operable to pivotally move the backrest ( 20 ) from a raised position to a reclined position via an intermediate position by operating the drive source ( 42 ), the seat ( 30 ) being tiltable to raise a front end thereof when the backrest is pivotally moved from the raised position to the intermediate position, the seat being tiltable to lower the raised front end thereof when the backrest is pivotally moved from the intermediate position to the reclined position.

1 . A chair-type massage machine comprising a backrest for the back of the user to bear on, a seat for the user to sit in, and a reclining mechanism for pivotally moving the backrest and the seat, the massage machine being characterized in that:
 the reclining mechanism comprises a single drive source, the drive source being coupled to the backrest and the seat by a link assembly,   the link assembly being operable to pivotally move the backrest from a raised position to a reclined position via an intermediate position by operating the drive source, the seat being tiltable to raise a front end thereof when the backrest is pivotally moved from the raised position to the intermediate position, the seat being tiltable to lower the raised front end thereof when the backrest is pivotally moved from the intermediate position to the reclined position.   
   
   
       2 . A chair-type massage machine comprising a backrest for the back of the user to bear on, a seat for the user to sit in, and a reclining mechanism for pivotally moving the backrest and the seat, the massage machine being characterized in that:
 the reclining mechanism comprises a single drive source, the drive source being coupled to one of the backrest and the seat, the backrest or the seat having the drive source coupled thereto being pivotally movably supported,   the backrest being connected to the seat by a link assembly having a joint portion, the joint portion of the link assembly being movable along a guide rail,   the drive source being operable to move the joint portion of the link assembly along the guide rail, as coupled to the pivotal movement of the backrest or the seat, and to pivotally move the backrest from a raised position to a reclined position via an intermediate position, the guide rail having a curved guide face for tilting the seat to raise a front end thereof when the backrest is pivotally moved from the raised position to the intermediate position and for tilting the seat to lower the raised front end thereof when the backrest is pivotally moved from the intermediate position to the reclined position.   
   
   
       3 . A chair-type massage machine wherein a base is provided with a backrest for the back of the user to bear on, a seat for the user to sit in, and a reclining mechanism for pivotally moving the backrest and the seat, the massage machine being characterized in that:
 the reclining mechanism comprises a single drive source, the drive source being coupled to one of the backrest and the seat, the backrest or the seat having the drive source coupled thereto being pivotally movably supported,   a link being pivoted at one end thereof to the backrest or the seat having the drive source coupled thereto, the link having the other end pivoted to a cam member supported by the base, the cam member being provided at a portion thereof with a cam face in bearing contact with the backrest or the seat not coupled to the drive source,   the drive source being operable to cause the link to rotate the cam member and to pivotally move the backrest from a raised position to a reclined position via an intermediate position, the cam face being so shaped as to tilt the seat to raise a front end thereof when the backrest is pivotally moved from the raised position to the intermediate position and as to tilt the seat to lower the raised front end thereof when the backrest is pivotally moved from the intermediate position to the reclined position.