Heart cam and damper unit and opening/closing controlling device using the same

An opening/closing controlling device interposed between a main body portion and a movable portion which undergoes opening and closing action with respect to said main body portion and is constantly urged in an opening direction, so as to impart locking and damping action with respect to said movable portion, wherein

• a heart cam and damper unit, which comprises:
• a base member having a fixed cylindrical portion and a stopper portion;
• a rotating member having a movable cylindrical portion which is rotatable assembled to said fixed cylindrical portion with a viscous fluid interposed between said movable cylindrical portion and said fixed cylindrical portion, and a pinion gear which rotates integrally with said movable cylindrical portion;
• a heart cam member which is rotatably fitted around an outer periphery of an outwardly located one of said fixed cylindrical portion and said movable cylindrical portion;
• and urging means which is interposed between said base member and said heart cam member, and is adapted to rotatable urge said heart cam member toward said stopper portion of said base member, is installed on one of said main body portion and said movable portion through said base member,
• a gear, which is meshed with said pinion gear, is provided which undergoes relative movement with respect to said heart cam and damper unit in conjunction with a movement of said movable portion, and
• a pin member is provided which is engaged with and disengaged from said heart cam member in conjunction with the movement of said movable member.

A heart cam and damper unit comprising:

• a base member having a fixed cylindrical portion and a stopper portion;
• a rotating member having a movable cylindrical portion which is rotatably assembled to said fixed cylindrical portion with a viscous fluid interposed between said movable cylindrical portion and said fixed cylindrical portion, and a pinion gear which rotates integrally with said movable cylindrical portion;
• a heart cam member which is rotatable fitted around said fixed cylindrical portion;
• and
• a spring which is interposed between said base member and said heart cam member, and is adapted to rotatably urge said heart cam member toward said stopper portion of said base member.