Buckle Structure for Seat Belt of Vehicle

Abstract

A buckle structure for a seat belt of a vehicle contains: a body, a rotation member, a locking device, and multiple buckles. The body includes a fixing mount and a cover, the fixing mount includes multiple grooves, each of which is defined between any two adjacent of multiple protrusions. The rotation member is mounted on the cover, and the locking device is defined between the fixing mount and the cover. The locking device includes a central shaft and an actuation sheet, and the central shaft has two opposite semicircular columns. The actuation sheet has an aperture, a hollow pillar, and multiple openings, wherein the hollow pillar has two opposite semicircular cutouts, an arcuately concave channel, two release tabs, and two symmetrical sliding channels. A first end of each buckle is connected with the seat belt, and a second end of each buckle has a connection head with a hole.

What is claimed is: 
     
         1 . A buckle structure for a seat belt of a vehicle comprising:
 a body including a fixing mount and a cover covering the fixing mount, the fixing mount including a plurality of grooves, each of the plurality of grooves being defined between any two adjacent of multiple protrusions;   a rotation member mounted on a top of the cover;   a locking device defined between the fixing mount and the cover, and the rotation member drives the locking device;   the locking device including a central shaft and an actuation sheet;   the central shaft being driven by the rotation member to rotate, and the central shaft having two opposite semicircular columns extending outwardly therefrom;   wherein the actuation sheet has an aperture defined on a center thereof, a hollow pillar stamp bent around and perpendicular to the aperture of the actuation sheet, and multiple openings formed on a peripheral side of the actuation sheet, wherein the central shaft inserts through the aperture and the hollow pillar, the hollow pillar has two opposite cutouts, an arcuately concave channel defined on a center of each of the two opposite cutouts, two release tabs arranged on two ends of the hollow pillar respectively, and two symmetrical sliding channels defined between the two release tabs of two ends of the arcuately concave channel and the two opposite semicircular cutouts respectively, the arcuately concave channel is coupled with the two symmetrical sliding channels, and coefficients of spiral surfaces of the arcuately concave channel and the two sliding channels are different, wherein the arcuately concave channel is flat, and the two sliding channels are steep; and   multiple buckles, wherein a first end of each of the multiple buckles is in connection with the seat belt, and a second end of each buckle has a connection head with a hole, when the connection head of each buckle inserts into one of the plurality of grooves of the body, the locking device locks in the hole so that the buckle fastens with the body, and when the rotation member is rotated, the two opposite circular columns of the central shaft push the actuation sheet to lift toward the cover at an opening height so that the locking device unfastens from the hole, thus removing the buckle from the body.   
     
     
         2 . The buckle structure as claimed in  claim 1 , wherein the two opposite cutouts of the hollow pillar are semicircular. 
     
     
         3 . The buckle structure as claimed in  claim 1 , wherein a lowest contact point is formed on a center of the arcuately concave channel, an idle rotation angle is defined among each of two sides of the arcuately concave channel and the lowest contact point, and the arcuately concave channel has two symmetrical highest points forming on two ends thereof respectively, wherein an idle rotation height is defined among the two symmetrical highest points and the lowest contact point of the arcuately concave channel, and the idle rotation height is less than the opening height. 
     
     
         4 . The buckle structure as claimed in  claim 3 , wherein the idle rotation angle is within 20 to 30 degrees, and a preferred idle rotation angle is 25 degrees. 
     
     
         5 . The buckle structure as claimed in  claim 1 , wherein each of the plurality of grooves has a slot extending from a central position thereof so as to accommodate an elasticity set which has a slidable block and a resilient element, wherein the slidable block has a notch defined therein so as to accommodate a first end of the resilient element, and a second end of the resilient element abuts against the slot. 
     
     
         6 . The buckle structure as claimed in  claim 1 , wherein the cover covers the fixing mount and is fixed by a screw, wherein the cover includes an accommodation chamber defined therein, and the cover includes multiple posts extending outwardly from the accommodation chamber; the locking device includes a fixed bolt element, multiple movable bolts, a returning spring, a positioning disc, and multiple sprigs, wherein the returning spring fits on the central shaft, the returning spring abuts against the cover and the actuation sheet, and the positioning disc has multiple orifices defined adjacent to a peripheral side thereof and configured to accommodate the fixed bolt element and the multiple movable bolts individually. 
     
     
         7 . The buckle structure as claimed in  claim 1 , wherein the central shaft partially extends out of the cover and connects with the rotation member.