Monotrack embedded hinge automatic door-closing mechanism

A monotrack embedded hinge automatic door-closing mechanism, comprising a door mounting block (1) configured to be mounted on a rotating door and a cabinet mounting plate (2) configured to be mounted on a cabinet matched with the door,

• wherein the cabinet mounting plate (2) drives the door mounting block (1) to rotate through a horizontally rotating connecting rod mechanism, a single guide track mechanism configured to guide the door mounting block (1) to contract and change a track is provided between the door mounting block (1) and the cabinet mounting plate (2), the single guide track mechanism comprises a chute rod (20) vertically fixed on the cabinet mounting plate (2) and a guide chute (14) formed in the door mounting block (1), and the chute rod (20) vertically upwards penetrates through the guide chute (14) and guides a rotating action of the door mounting block (1) along an interior of the guide chute (14);
• a spring mounting rod (10) is fixed on the door mounting block (1), an angle retaining block (3) is rotatably fixed on a panel of the door mounting block (1) on a side opposite to the spring mounting rod (10), an outer wall of the angle retaining block (3) is slidably connected with a top end of the chute rod (20), and when the chute rod (20) is moved in the guide chute (14), the top end of the chute rod (20) drives the angle retaining block (3) to rotate;
• a reset spring (13) is mounted between the angle retaining block (3) and the spring mounting rod (10), and when the door mounting block (1) is rotated to a side of attachment to the cabinet mounting plate (2) and is in a closed state, the reset spring (13) is in a stretched state, the angle retaining block (3) tightly abuts against the chute rod (20) without displacement, and when the door mounting block (1) is moved to a fully opened position, the angle retaining block (3) is overturned to the top end of the chute rod (20) and kept at the top end, and in the overturning process of the angle retaining block (3), the reset spring (13) provides a closing rotating force for the door mounting block (1), and when the top end of the chute rod (20) is fixed at a bottom of the angle retaining block (3), the reset spring (13) does not provide the closing rotating force for the door mounting block (1).