Safety gate

1. A safety gate comprising:

a first post assembly;

a spinning mechanism rotatably mounted in the first post assembly and having a first abutting portion;

a cover body having two edges, one of the edges mounted in the spinning mechanism, the cover body configured to be selectively wound around the spinning mechanism, and selectively pulled out from the spinning mechanism to spin the spinning mechanism; and

a positioning mechanism having

a knob having a lug;

a positioning mount connected with the knob, configured to be moved upwardly or downwardly relative to the spinning mechanism to selectively disengage from and engage with the spinning mechanism, and having

a sliding groove having a second abutting portion protruding from the sliding groove, wherein the lug is slidably mounted in the sliding groove and selectively abuts against the second abutting portion;

wherein when the positioning mount is engaged with the spinning mechanism to prevent the spinning mechanism from spinning, the lug is located below and abuts against the first abutting portion to prevent the positioning mechanism from moving up relative to the spinning mechanism; and

when the lug is slid to misalign with the first abutting portion and abut against the second abutting portion, the positioning mount is capable of moving up relative to the spinning mechanism to disengage from the spinning mechanism; wherein

the positioning mechanism has a turning member and a fastener;

the knob has an engaging recess formed in the knob;

the lug is formed on the turning member and is engaged with the engaging recess of the knob to connect the knob with the turning member;

the positioning mount is mounted around an end of the knob and is connected with the knob by the fastener of the positioning mechanism;

the positioning mechanism has a torsion spring mounted in the positioning mount at a side of the positioning mount that faces the knob;

the knob has a spring-abutting portion disposed near and abutting against an end of the torsion spring;

the torsion spring is twisted when the lug is sliding to abut against the second abutting portion; and

after the positioning mount is disengaged from the spinning mechanism, the torsion spring pushes the spring-abutting portion relative to the positioning mount to drive the lug to slide relative to the sliding groove to align with the first abutting portion;

the lug has a beveled surface formed in a bottom of the lug;

after the positioning mount is disengaged from the spinning mechanism, the torsion spring pushes the spring-abutting portion to drive the lug to slide to align with the first abutting portion; and

when the lug is located above the first abutting portion, the knob is pressed to slide the beveled surface along the first abutting portion to move down the lug to a position below the first abutting portion.

2. The safety gate as claimed in claim 1 , wherein:

the positioning mount has two limiting portions arranged at a spaced interval;

the knob has a positioning protrusion located between the two limiting portions, wherein

when the knob is turned relative to the positioning mount to abut the positioning protrusion against the two limiting portions, the lug is slid to align with the first abutting portion and the second abutting portion.

3. The safety gate as claimed in claim 1 , wherein

the spinning mechanism comprises a spinning sleeve, a spinning bracket, a first resilient element, and a fixed rod;

the spinning bracket is rotatably mounted on the first post assembly;

the fixed rod is fixed in the first post assembly;

the spinning bracket is connected to the fixed rod by the first resilient element; and

the spinning bracket is rotated relative to the fixed rod to twist the first resilient element to store elastic potential energy.

4. The safety gate as claimed in claim 3 , wherein

the spinning mechanism comprises a fixed sleeve fixed on the first post assembly, mounted around the spinning bracket, and securely connected to the fixed rod;

the spinning bracket has first engagement teeth formed on an outer surface of the spinning bracket;

the fixed sleeve has second engagement teeth formed on an inner surface of the fixed sleeve; and

the positioning mount is mounted between the fixed sleeve and the spinning bracket and has third engagement teeth engaged with the first engagement teeth and the second engagement teeth.

5. The safety gate as claimed in claim 4 , wherein

the spinning mechanism comprises a mounting rod having two ends respectively mounted in the spinning bracket and the spinning sleeve; and

the cover body surrounds and is fixed on the mounting rod.

6. The safety gate as claimed in claim 1 , wherein

the safety gate comprises a second post assembly opposite to the first post assembly; and

the cover body has a fixing unit mounted in the other one of the two edges of the cover body for fixing the cover body in the second post assembly.

7. The safety gate as claimed in claim 6 , wherein

the fixing unit has a mounting tube, a second resilient element, a sliding rod, and a fitting seat;

the second resilient element, the sliding rod, and the fitting seat are mounted in the mounting tube;

the sliding rod is slidably mounted in the fitting seat and has an end protruding from the fitting seat and a flange abutting against the fitting seat;

the cover body is connected with the mounting tube; and

the second post assembly has an engagement recess formed in the second post assembly; wherein the sliding rod selectively protrudes from the mounting tube to insert into the engagement recess of the second post assembly.