Safety device on steering handle

Abstract

Disclosed is a safety device on a steering handle, capable of controlling a direction-control wheel of a wheeled vehicle. The handlebar is engaged with the head part by its mortise with a tenon of the head part. When an outer bar end of the handlebar is hit, an inner tube of the handlebar will be pushed to disengage the mortise and the tenon to rotate the handlebar along. Alternatively, paired washers with wedge-shaped teeth can be utilized to engage the handlebar with the head part. When the outer bar end is hit, the washers are disengaged to allow the handlebar to rotate. Moreover, a hydraulic system or an inserting rod with a chassis groove system can be employed to maintain the original direction of the direction-control wheel when the handlebar is hit. Therefore, a sudden turn of the direction-control wheel and an fall-over of the rider and the vehicle can be prevented.

What is claimed is: 
     
         1 . A safety device on a steering handle, positioned on a wheeled vehicle having a direction-control wheel, comprising:
 a head part, connected with a chassis of the vehicle;   a handlebar, joined to the head part;   a buffer assembly, allowing the handlebar to rotate when hit by an external impact force and at the same time maintaining the original direction of the direction-control wheel as the handlebar is hit by the external force; and   a tenon positioned on the head part and the handlebar further comprises an outer bar and an inner tube, wherein the handlebar is engaged with the head part by the tenon for controlling the direction-control wheel of the wheeled vehicle,   wherein the buffer assembly further comprises a direction maintaining mechanism for maintaining the original direction of the direction-control wheel as the balance terminal is hit and the handlebar is rotated, and   wherein the direction maintaining mechanism further comprises a chassis groove system, positioned on the chassis and having a plurality of grooves.   
     
     
         2 . The safety device on the steering handle of  claim 1 , wherein the direction maintaining mechanism further comprises a frustum and an inserting rod positioned inside of the head part, wherein the inner tube pushes the frustum and make the inserting rod insert into one of the grooves to maintain the original direction of the direction-control wheel as the balance terminal is hit. 
     
     
         3 . The safety device on the steering handle of  claim 2 , wherein the direction maintaining mechanism further comprises a tuned recovery spring to allow the inserting rod being withdrawn from the one of the grooves after the external force disappears. 
     
     
         4 . A safety device on a steering handle, positioned on a wheeled vehicle having a direction-control wheel, comprising:
 a head part, connected with a chassis of the vehicle;   a handlebar, joined to the head part; and   a buffer assembly, allowing the handlebar to rotate when hit by an external impact force and at the same time maintaining the original direction of the direction-control wheel as the handlebar is hit by the external force,   wherein the buffer assembly further comprises a first washer with wedge-shaped teeth and a second washer with wedge-shaped teeth, wherein the first washer with wedge-shaped teeth placed at the head part and the second washer with wedge-shaped teeth placed at one end of the handlebar are connected with respective wedge-shaped teeth and connected with the head part by a screw bolt, wherein the connection of the respective wedge-shaped teeth is disengaged as the other end of the handlebar is hit.   
     
     
         5 . The safety device on the steering handle of  claim 4 , wherein the buffer assembly further comprises a spring washer for fixing the connection of the respective wedge-shaped teeth of the first washer and second washer, wherein the spring washer recovers the connection of the respective wedge-shaped teeth after the external force at the end of the handlebar disappears. 
     
     
         6 . The safety device on the steering handle of  claim 4 , wherein the buffer assembly further comprises a direction maintaining mechanism having a chassis groove system, positioned on the chassis and having a plurality of grooves. 
     
     
         7 . The safety device on the steering handle of  claim 6 , wherein the direction maintaining mechanism further comprises a frustum and an inserting rod positioned inside of the head part, wherein the inner tube pushes the frustum and make the inserting rod insert into one of the grooves to maintain the original direction of the direction-control wheel as the balance terminal is hit. 
     
     
         8 . The safety device on the steering handle of  claim 7 , wherein the direction maintaining mechanism further comprises a tuned recovery spring placed between the inserting rod and the head part to allow the inserting rod being withdrawn from one of the grooves after the external force disappears.