AUTOMATIC CONTRACTING AND LOCKING RATCHET WHEEL LOCK
FIG2 is another structural diagram of the automatic retracting and locking ratchet wheel lock catch according to the implementation embodiment of this invention
The first button 600 is coupled with the first end of the locking buckle 500 (as in the example of FIG2, the right end of the locking buckle 500). The second button 700 is coupled with the second end of the locking buckle 500 (as in the example of FIG2, the left end of the locking buckle 500). Take FIG2 as an example. When the first button 600 is pressed, the second button 700 bounces under the driving of the locking buckle; the locking protrusion 510 is combined with any one of the locking ratchets 201, and the non-return protrusions 520 are disengaged from any one of the non-return grooves 202; the rotating wheel 200 is allowed to rotate in the counterclockwise direction and prohibited from rotating in the clockwise direction; the steel cable 400 is tightened. FIG2 shows the initial state of the automatic retracting and locking ratchet wheel lock catch according to the embodiment of this invention. At this time, the locking protrusion 510 is coupled with any one of the locking ratchets 210, while the non-return protrusion 520 is disengaged from any one of the non-return grooves 202; the rotation wheel 200 is allowed to rotate in the counterclockwise direction and prohibited from rotating in the clockwise direction; the steel cable 400 is tightened.
structural diagram
800
limit-position buckle
900
spring
1100
steel cable sleeve
710
second return spring
100
housing
400
steel cable
600
first button
500
locking buckle
101
first connecting hole
102
second connecting hole
1000
buckle
610
first return spring
510
locking protrusion
200
wheel
520
protrusion protrusions
700
second button
['1. A ratchet wheel lock catch that automatically shrinks and locks,  characterized in  comprising: a housing; a rotating wheel: the rotating wheel is rotatably mounted on the housing; multiple locking ratchets as well as multiple non-return grooves under multiple locking ratchets are evenly arranged on the outer peripheral wall of the rotating wheel along the circumferential direction of the rotating wheel; an energy storage spring: the energy storage spring is coaxially sleeved in the rotating wheel; the first end of the energy storage spring is fixed to the housing, and the second end of the energy storage spring is fixed to the rotating wheel; the energy storage spring is used to normally drive the rotating wheel to rotate in the first direction; a steel cable: the steel cable is wound around the outer peripheral wall of the rotating wheel; the first end of the steel cable is fixed to the rotating wheel and the second end of the steel cable extends out of the housing; a locking buckle: the locking buckle is pivotally mounted on the housing; the first end of the locking buckle has locking protrusions adapted to any of the locking ratchets, while the second end has non-return protrusions adapted to any of the non-return grooves; the locking protrusions and the non-return protrusions are respectively disposed on both sides of the pivot point of the locking buckle; a first button: the first button is coupled with the first end of the locking  buckle; a second button: the second button is coupled with the second end of the locking buckle; when the first button is pressed, the second button bounces under the driving of the locking buckle; the locking protrusion is combined with any one of the locking ratchets, and the non-return protrusions are disengaged from any one of the non-return grooves; the rotating wheel is allowed to rotate in the first direction and prohibited from rotating in the second direction; the steel cable is tightened; when the second button is pressed, the first button bounces under the driving of the locking buckle; the locking protrusion is disengaged from any one of the locking ratchets, and the non-return protrusion is combined with any one of the non-return grooves; the rotating wheel is allowed to rotate in the second direction and prohibited from rotating in the first direction; the steel cable is pulled out.', '2. The automatic shrinking and locking ratchet wheel lock catch as claimed in claim 1,  characterised in that  it also comprises a limit-position buckle and a spring, the first end of the spring abuts on the housing, while the second end of the spring abuts on the limit-position buckle to push the limit-position buckle to be coupled with the first end of the locking buckle, so that the locking buckle is positioned at a position where the ratchet is coupled with the rotating wheel or where the ratchet is disengaged from the rotating wheel.', '3. The automatic shrinking and locking ratchet wheel lock catch as claimed in claim 2,  characterised in that  it also comprises a first return spring and a second return spring; the first end of the first return spring abuts on the first end of the locking buckle, while the second end of the first return spring abuts on the first button; the first end of the second return spring abuts on the housing, while the second end of the second return spring abuts on the second button.', '5. The automatic shrinking and locking ratchet wheel lock catch as claimed in claim 4,  characterised in that  it also comprises a steel cable sleeve; the steel cable sleeve is coupled with the housing; the second end of the steel cable passes through the steel cable sleeve and coupled with the buckle.', '6. The automatic shrinking and locking ratchet wheel lock catch as claimed in claim 4,  characterised in that  the housing has a first connecting hole and a second connecting hole.']