Abstract: A railess variable seatback type rear seat includes: a linear movement device configured to convert a rotation of a motor into a linear movement; a sliding movement device configured to convert the linear movement into a sliding movement in which a seat cushion is pushed forward or backward; and a reclining angle change device configured to convert the sliding movement into a reclining movement, and to fold a seatback, which is connected to the seat cushion, forward or to recline the seatback backward.

Abstract: The present invention provides a sphincter exerciser for strengthening the sphincters of persons in an effort to prevent diseases, such as aconuresis or encopresis caused by weak sphincters. This sphincter exerciser consists of a body (10), which has two depressions (4), two hinge holes (6) and a window (8). Two footholds (20) are hinged to the two hinge holes (6) by means of two hinge shafts (18). A roller (30) is shafted to the roller bracket (14) of each foothold (20), and is laid on the inclined bottom of an associated depression (4). The exerciser also has a momentum adjuster (40), which is installed in the body (10) and allows a user to adjust momentum while exercising. This momentum adjuster (40) has an adjusting block, two guide rollers (38), a wire (46), and a coil spring (48) connected to the hinge shafts (18) by the wire (46).

Abstract: The present invention provides a sphincter exerciser for strengthening the sphincters of persons in an effort to prevent diseases, such as aconuresis or encopresis caused by weak sphincters. This sphincter exerciser consists of a body (10), which has two depressions (4), two hinge holes (6) and a window (8). Two footholds (20) are hinged to the two hinge holes (6) by means of two hinge shafts (18). A roller (30) is shafted to the roller bracket (14) of each foothold (20), and is laid on the inclined bottom of an associated depression (4). The exerciser also has a momentum adjuster (40), which is installed in the body (10) and allows a user to adjust momentum while exercising. This momentum adjuster (40) has an adjusting block, two guide rollers (38), a wire (46), and a coil spring (48) connected to the hinge shafts (18) by the wire (46).