Ultra-thin plastic steel zipper

Abstract

An ultra-thin plastic steel zipper includes: a pair of zipper fabric belts; two sets of teeth, respectively distributed along a direction of the pair of zipper fabric belts and engaged onto an inner side of each zipper fabric belt; a zipper head; a pair of top stops; and a bottom stop; the upper surface and the lower surface of the tooth are composed of three surfaces comprising a flat surface, a tapered surface, and a vertical surface, both an upper surface and a lower surface of the tooth has a tapered structure from the tooth head to the tooth tail, the overall volume of the teeth is significantly reduced, and the thickness and volume of the central line of the fabric belt are reduced, the established appearance of the plastic steel zipper is improved.

What is claimed is: 
     
         1 . An ultra-thin plastic steel zipper, comprising:
 a pair of zipper fabric belts ( 1 );   two sets of teeth ( 2 ), respectively distributed along a direction of the pair of zipper fabric belts ( 1 ) and engaged onto an inner side of each zipper fabric belt ( 1 );   a zipper head ( 5 );   a pair of top stops ( 31 ,  32 ); and   a bottom stop ( 4 );   wherein an overall zipper is symmetrical from left to right, left teeth and right teeth are engaged with each other through sliding of the zipper head ( 5 ), a tooth head ( 24 ) is thicker than a tooth tail ( 25 ); when viewed from a cross-section of each tooth ( 2 ), both an upper surface ( 27 ) and a lower surface ( 28 ) of each tooth ( 2 ) has a tapered structure from the tooth head ( 24 ) to the tooth tail ( 25 ).   
     
     
         2 . The ultra-thin plastic steel zipper according to  claim 1 , wherein both the upper surface ( 27 ) and the lower surface ( 28 ) of the tooth ( 2 ) are composed of three surfaces comprising a flat surface ( 21 ), a tapered surface ( 22 ), and a vertical surface ( 23 ); when the left teeth and right teeth are engaged, the tapered structure is formed, and an upper surface ( 27 ) and a lower surface ( 28 ) of the tapered structure are further composed of a middle portion being a flat surface, and two sides being respectively the tapered surface and the vertical surface connected to each other. 
     
     
         3 . The ultra-thin plastic steel zipper according to  claim 1 , wherein the tooth ( 2 ) is provided with a gap ( 29 ) configured for the zipper fabric belt ( 1 ) passing through, and the two set of teeth ( 2 ) engaged to a central line ( 11 ) of the zipper fabric belt at the gap ( 29 ), so as to engage with the zipper fabric belt ( 1 ). 
     
     
         4 . The ultra-thin plastic steel zipper according to  claim 1 , wherein the upper surface ( 27 ) and the lower surface ( 28 ) of the tooth ( 2 ) are symmetrical. 
     
     
         5 . The ultra-thin plastic steel zipper according to  claim 1 , wherein the upper surface ( 27 ) and the lower surface ( 28 ) of the tooth ( 2 ) are asymmetric. 
     
     
         6 . The ultra-thin plastic steel zipper according to  claim 1 , wherein the tapered surfaces ( 22 ) of the upper surface ( 27 ) and the lower surface ( 28 ) of the tooth ( 2 ) are in a shape of an arch curved surface. 
     
     
         7 . The ultra-thin plastic steel zipper according to  claim 1 , wherein the tapered surfaces ( 22 ) of the upper surface ( 27 ) and the lower surface ( 28 ) of the tooth ( 2 ) are in a shape of a concave curved surface. 
     
     
         8 . The ultra-thin plastic steel zipper according to  claim 1 , wherein the tapered surfaces ( 22 ) of the upper surface ( 27 ) and the lower surface ( 28 ) of the tooth ( 2 ) are in a shape of a flat surface. 
     
     
         9 . The ultra-thin plastic steel zipper according to  claim 1 , wherein the zipper fabric belt ( 1 ) is an ultra-thin fabric belt, and a row of holes ( 12 ) arranged continuously and spaced along an arranging direction of the teeth ( 2 ) adjacent to a central line ( 11 ) are provided in an engagement area between the zipper fabric belt ( 1 ) and the teeth ( 2 ); the row of holes ( 12 ) on the zipper fabric belt ( 1 ) are formed when weaving the zipper fabric belt ( 1 ), or formed by a laser and a punching method, the teeth ( 2 ) are injection molded onto the zipper fabric belt ( 1 ), at least one hole ( 12 ) is provided at the engagement area where each tooth ( 12 ) is engaged with the zipper fabric belt ( 1 ), and each tooth ( 12 ) is provided with a stabilizing column ( 26 ) penetrating the hole ( 12 ), the stabilizing column ( 26 ) and the tooth ( 2 ) are integrally formed. 
     
     
         10 . The ultra-thin plastic steel zipper according to  claim 9 , wherein when the teeth ( 2 ) are injection molded onto the zipper fabric belt ( 1 ), sizing vacancies between the teeth ( 2 ) on the zipper fabric belt ( 1 ) are reserved by a new automatic vacancy arrangement technology. 
     
     
         11 . The ultra-thin plastic steel zipper according to  claim 9 , wherein a ratio of a thickness (H 1 ) of a central line ( 11 ) the zipper fabric belt ( 1 ) to a thickness (H 3 ) of the zipper fabric belt ( 1 ) is less than 2.4:1. 
     
     
         12 . The ultra-thin plastic steel zipper according to  claim 9 , wherein a thickness (H 1 ) of a central line ( 11 ) accounts for less than 43% of a maximum thickness (H 2 ) of the tooth ( 2 ). 
     
     
         13 . The ultra-thin plastic steel zipper according to  claim 9 , wherein the zipper head ( 5 ) comprises an upper guide plate ( 51 ), a lower guide plate ( 52 ), a core connecting column ( 53 ), a front end ( 54 ), and a tail end ( 55 ); an inner cavity is formed between the upper guide plate ( 51 ) and the lower guide plate ( 52 ) configured for the teeth ( 12 ) passing through, and shapes of inner and outer sides of the upper guide plate ( 51 ) and the lower guide plate ( 52 ) are matched with a tapered shape of the teeth ( 12 ). 
     
     
         14 . The ultra-thin plastic steel zipper according to  claim 1 , wherein the pair of top stops ( 31 ,  32 ) are arranged at a top end of the zipper, and the pair of top stops ( 31 ,  32 ) are composed of a left top stop ( 31 ) and a right top stop ( 32 ), and cross-sections of the pair of top stops ( 31 ,  32 ) are the same as that of the teeth ( 2 ); the bottom stop ( 4 ) is arranged at a bottom end of the zipper, the bottom stop ( 4 ) is a tailless type or an open tail type, and when the bottom stop ( 4 ) is the tailless type, a cross-section of the bottom stop ( 4 ) is the same as a tapered cross-section of an engagement surface formed by engaging the left and right teeth; and when the bottom stop ( 4 ) is the open tail type, a cross-section of the bottom stop ( 4 ) formed by a block and a pin is the same as the cross-section of each tooth ( 12 ). 
     
     
         15 . The ultra-thin plastic steel zipper according to  claim 1 , wherein a length (L 1 ) from the tooth head ( 24 ) to the flat surface ( 21 ) of the tooth tail ( 25 ) of the tooth ( 2 ) accounts for more than 40% of an overall length (L 2 ) from the tooth head ( 24 ) to the tooth tail ( 25 ). 
     
     
         16 . The ultra-thin plastic steel zipper according to  claim 1 , wherein an intersection angle (θ 1 ) between the tapered surface ( 22 ) and the vertical surface ( 23 ) of each tooth is formed, and the intersection angle (θ 1 ) is ranged from 100° to 150°. 
     
     
         17 . The ultra-thin plastic steel zipper according to  claim 1 , wherein the tooth tail ( 25 ) comprises two vertical surfaces ( 23 ) arranged from a top to a bottom, and a total height (H 6 ) of the two vertical surfaces ( 23 ) is ranged from 0.5 mm to 1.5 mm.