Patent Publication Number: US-11377322-B2

Title: Rotary self-lock catch

Description:
BACKGROUND OF THE INVENTION 
     1. Technical Field 
     The present invention relates to the technical field of self-lock apparatuses for ropes, in particular to a rotary self-lock catch. 
     2. Description of Related Art 
     As everyone knows, in daily life, when some articles with ropes are used, it is necessary to tighten and scale the ropes to realize corresponding purposes, for example, shoelaces, waistbands, packets and so on. As far as the shoelaces are concerned, the ropes are arranged on two sides of a welt, primarily aiming at tightening the welt, and therefore, shoes are worn on feet stably. When it is used, the shoelace penetrates through two rows of shoelace holes of a shoe in a cross manner, and it is necessary to tie two ends of the shoelace into a knot such as a bowknot. 
     However, there are usually corresponding skills to tie knots of the shoelace, the waistband or the packet. As far as some groups are concerned, for example, children, it is often the most difficult thing to tie the knots; and for another example, disabled persons or people without both hands available cannot tie the shoelace, the waistband, the packet and etc. 
     Furthermore, when the knot is tied, if it is needed to loosen or tighten the knot, it is further necessary to unfasten the knot and tie the knot again, so that it is relatively tedious to operate. In addition, the tied knot is always loosened in a moving process and the knot is unfastened automatically, thereby often bringing much inconvenience to users. 
     BRIEF SUMMARY OF THE INVENTION 
     In order to overcome deficiencies in the prior art, the objective of the present invention is to provide a rotary self-lock catch. 
     In order to achieve the purpose, the present invention adopts a technical scheme as follows: 
     A rotary self-lock catch, including: 
     a pedestal fixedly arranged on an article needed to tighten a rope, an upper end being provided with a mounting cavity and a side wall of the mounting cavity being provided with a rope penetrating opening; 
     an arresting disc mounted in the mounting cavity in an aligned manner, limited with the mounting cavity to be prevented from rotating, a periphery of an upper end being provided with at least one elastic buckle, a tail end thereof extending along a same rotating direction, and an outer side of the tail end of the elastic buckle being provided with a first latch inclining equal to the extending direction of the elastic buckle; 
     a rotary knob being buckled to the arresting disc and capable of rotating relative to the arresting disc, a middle portion of an inner cavity being provided with an abutting convex column and a side wall being provided with a second latch matched with the first latch, and a top end of the abutting convex column being provided with a third latch; 
     a take-up reel placed in the mounting cavity, located under the arresting disc and located on a side surface of the take-up reel to form a take-up cavity, an inner wall of the take-up cavity being provided with a through hole, the other end of the through hole being provided with a hollowed cavity, at least one spring being arranged between the bottom of the take-up reel and the mounting cavity, the take-up reel having a tendency of bouncing outwards under an action of the spring, the upper end of the take-up reel being provided with a pressing convex column and a fourth latch matched with the third latch, and under the action of the spring, a top end of the pressing convex column being placed outside the rotary knob after penetrating through center axes of the arresting disc and the rotary knob successively. 
     Preferably, a side surface of the arresting disc is provided with a limiting block, the limiting block is placed in the rope penetrating opening in an aligned manner, and the limiting block is provided with a wire channel communicated with the take-up cavity. 
     Preferably, a bottom of the mounting cavity and a bottom end of the take-up reel are respectively provided with limiting cavities at the spring, and two ends of the spring are respectively placed in the limiting cavities in an aligned manner. 
     Preferably, an outer side of the arresting disc is provided with at least one fastener and a position of the pedestal located at a bottom or a side wall of the mounting cavity is provided with a clamping opening matched with the fastener. 
     Preferably, an outer surface of the rotary knob is provided with a skidproof stripe. 
     By adopting the above-mentioned scheme, as a rope penetrates into the take-up cavity of the take-up reel and a tail end of the rope is limited at a boundary between a through hole and a hollowed cavity, when the rotary knob is rotated, the take-up reel can be driven to rotate together, so that the rope is wound in the take-up cavity by the take-up reel, and the rotary knob is allowed to rotate along one direction to be prevented from rotating back under the action of the elastic buckle of the arresting disc, so that an effect of tightening the rope can be realized. During use, it is no longer necessary to knot the rope. When necessary to loosen the rope, only necessary to press the pressing convex column on the take-up reel to compress the spring to separate abutment between the take-up reel and the rotary knob, and the take-up reel can rotate so as to release the rope, thereby realizing an effect of loosening the rope. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         FIG. 1  is a schematic diagram of a structure principle of an embodiment of the present invention. 
         FIG. 2  is a schematic diagram of a three-dimensional structure of an embodiment of the present invention. 
         FIG. 3  is a structural schematic diagram of an arresting disc of an embodiment of the present invention. 
         FIG. 4  is a structural schematic diagram of a rotary knob of an embodiment of the present invention. 
         FIG. 5  is a structural schematic diagram of a take-up reel of an embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Detailed description is made on the embodiments of the present invention below in combination with drawings. However, the present invention may be implemented by various different modes defined and covered by Claims. 
     As shown in  FIG. 1  to  FIG. 5 , the rotary self-lock catch provided by the embodiment, including: 
     a pedestal  1  fixedly arranged on an article needed to tighten a rope, an upper end being provided with a mounting cavity  11  and a side wall of the mounting cavity  11  being provided with a rope penetrating opening  12 , the rope penetrating here; 
     an arresting disc  2  mounted in the mounting cavity  11  in an aligned manner, limited with the mounting cavity  11  to be prevented from rotating, a periphery of an upper end being provided with at least one elastic buckle, a tail end thereof extending along a same rotating direction, and an outer side of the tail end of the elastic buckle  21  being provided with a first latch  22  inclining equal to the extending direction of the elastic buckle  21 ; 
     a rotary knob  3  being buckled to the arresting disc  2  and capable of rotating relative to the arresting disc  2 , the rotary knob being provided with a corresponding clamping position  35  to prevent the rotary knob  3  from being separated, a middle portion of an inner cavity being provided with an abutting convex column  31  and a side wall being provided with a second latch  32  matched with the first latch  22 , a top end of the abutting convex column  31  being provided with a third latch  33 , and after the first latch  22  and the second latch  32  are clamped, the rotary knob  3  being capable of rotating along a direction, the rotating direction being equal to the extending direction of the elastic buckle  21 ; 
     a take-up reel  4  placed in the mounting cavity  11 , located under the arresting disc  2  and located on a side surface of the take-up reel to form a take-up cavity  41 , an inner wall of the take-up cavity  41  being provided with a through hole  42 , the other end of the through hole  42  being provided with a hollowed cavity  43 , after the tail end of the rope penetrates into the through hole  42 , the rope being clamped and fixed to the through hole  42  by way of tying a knot to prevent the rope from being separated from the take-up reel  4 , at least one spring  5  being arranged between the bottom of the take-up reel and the mounting cavity  11 , the take-up reel having a tendency of bouncing outwards under an action of the spring  5 , the upper end of the take-up reel  4  being provided with a pressing convex column  44  and a fourth latch  45  matched with the third latch  33 , and under the action of the spring  5 , a top end of the pressing convex column  44  being placed outside the rotary knob  3  after penetrating through center axes of the arresting disc  2  and the rotary knob  3  successively. 
     In specific use, the take-up reel  4  may be driven by the rotary knob  3  under the actions of the third latch  33  and the fourth latch  45  by rotating the rotary knob  3  manually so as to wind the rope in the take-up cavity  41 . When the rotary knob stops rotating, under the elastic action of the elastic buckle  21 , inclined design of the first latch  22  and the clamping action of the second latch  32 , it is prevented from rotating, i.e., the rope is prevented from being drawn from the take-up cavity  41 . When necessary to release the rope, only necessary to press the pressing convex column  44  on the take-up reel  4  to compress the spring  5  to separate abutment between the take-up reel  4  and the rotary knob  3 , and the take-up reel  4  may rotate. Under the action of tension of the article or an external force, the rope may be released, thereby realizing an effect of loosening the rope. 
     Further, the arresting disc  2  is not rotatable relative to the pedestal  1 , i.e., the arresting disc is limited with the mounting cavity  11 . Therefore, in the embodiment, the side surface of the arresting disc  2  is provided with the limiting block  23 , the limiting block  23  can be placed in the rope penetrating opening  12  in an aligned manner, the limiting block  23  is provided with a wire channel  24  communicated with the take-up cavity  41 , the arresting disc  2  may be limited via the limiting block  23  and the rope penetrating opening  12 , and the limiting block  23  is provided with the wire channel  24 , so that penetration of the rope is not affected. Therefore, the arresting disc  2  may be limited by means of the rope penetrating opening  12  structurally. 
     Further, in order to enhance the mounting stability of the spring  5 , in the embodiment, a bottom of the mounting cavity  11  and a bottom end of the take-up reel  4  are respectively provided with limiting cavities  13  at the spring  5 , and two ends of the spring  5  are respectively placed in the limiting cavities  13  in an aligned manner. The limiting cavities designed in the take-up reel  4  thereof play a primary limiting role to prevent moving of the spring  5  effectively. 
     Further, as far as mounting stability of the arresting disc  2  is concerned, the embodiment is assembled in a clamping form, i.e., the outer side of the arresting disc  2  in the embodiment is provided with at least one fastener  25 , a position of the pedestal  1  located at a bottom or a side wall of the mounting cavity  11  is provided with a clamping opening  14  matched with the fastener  25 , and after the arresting disc  2  is placed in the mounting cavity  11 , the fastener  25  is directly embedded into the clamping opening  14 , thereby realizing a clamping state. 
     Preferably, an outer side surface of the rotary knob  3  is provided with a skidproof stripe  34  to prevent finger slip during rotation. 
     The above is merely preferred embodiments of the application and does not hence limit the patent range of the application. Equivalent structure or equivalent flow conversion made by means of the contents of the description and drawings of the application are applied to other related technical fields directly or indirectly, which is, in a similar way, comprised in the protection scope of the patent of the application.