Suspension type swing mechanism

A suspension type swing mechanism, comprising:

• a fastening base, the circumference thereof being radially pivoted with a supporter, and the bottom thereof being installed with an axial hole;
• a swing member, the bottom thereof being connected to the top of a hung article, and said swing member being installed with an axially-extended axial tube which upwardly passing through said axial hole and penetrating into said fastening base;
• a transmission device, a motor thereof being fixed at the periphery of said axial hole, an output shaft of said motor being connected to the inner end of a crank set, the outer end of said crank set being provide with a sleeve member sleeved on said axial tube for forming a synchronous motion;
• and
• an axial rotation device, which further including:
• a first rolling mechanism, wherein a bottom ring being installed at the bottom of said swing member, so the outer end of said bottom ring being adjacent to said hung article and is linked to swing with said swing member;
• a top ring being provided and combined on top of said bottom ring, so the top of said top ring being adjacent to said fastening base, said two rings being passed through by said axial tube, and engaging surfaces of said two rings being respectively and oppositely formed with an annular rail for receiving a plurality of rolling balls and allowing said rolling balls to roll therein;
• and
• a second rolling mechanism, wherein an outer ring being fixed in said axial hole, so the bottom surface of said outer ring being adjacent to and pressing against said top ring, an inner ring being provided and combined on top of said outer ring, so said inner ring being sleeved with said axial tube, and engaging surfaces of said two rings being respectively and oppositely formed with an annular rail for receiving a plurality of rolling balls and allowing said rolling balls to roll therein;
• with the output of said motor, said sleeve member at the output end of said crank set driving said axial tube and said hung article to to-and-fro swing at a pre-determined angle.