Webbing adjustment device for a seat belt system

Abstract

A webbing adjustment device for a seat belt system has a frame and a slider. The frame has a first hole and a second hole below the first hole. A front section of a webbing extends through the second hole of the frame. The slider is detachably connected to the frame. The slider has a first end portion, a second end portion, a connecting portion, and a through groove. The connecting portion is formed between the first end portion and the second end portion. The through groove is formed through the connecting portion. The connecting portion of the slider is inserted through the first hole, and a rear section of the webbing is passed through the first hole and the through groove, and the rear section is locked or unlocked by a relative motion between the frame and the slider.

What is claimed is: 
     
         1 . A webbing adjustment device for a seat belt system, the webbing adjustment device comprising:
 a frame having
 a first hole formed through the frame; and 
 a second hole formed through the frame below the first hole of the frame, wherein a front section of a webbing extends through the second hole of the frame; and 
   a slider moveably and detachably connected to the frame and having
 a first end portion formed on the slider; 
 a second end portion formed on the slider and being opposite to the first end portion of the slider; 
 a connecting portion formed on the slider between the first end portion and the second end portion of the slider, and the connecting portion having a top surface and a bottom surface; 
 a through groove formed through the connecting portion from the top surface of the connecting portion to the bottom surface of the connecting portion; and 
   wherein the connecting portion of the slider is inserted through the first hole of the frame, and a rear section of the webbing is passed through the first hole of the frame and the through groove of the slider, and the rear section of the webbing is locked or unlocked by a relative motion between the frame and the slider.   
     
     
         2 . The webbing adjustment device as claimed in  claim 1 , wherein the first end portion of the slider and the second end portion are deviating vertically, the first end portion of the slider has a bottom, the second end portion has a top, and the connecting portion is formed between the bottom of the first end portion and the top of the second end portion. 
     
     
         3 . The webbing adjustment device as claimed in  claim 2 , wherein the through groove of the slider is sloped from the top of the second end portion toward the bottom of the first end portion. 
     
     
         4 . The webbing adjustment device as claimed in  claim 1 , wherein the front section of the webbing is inserted through the second hole of the frame. 
     
     
         5 . The webbing adjustment device as claimed in  claim 2 , wherein the front section of the webbing is inserted through the second hole of the frame. 
     
     
         6 . The webbing adjustment device as claimed in  claim 3 , wherein the front section of the webbing is inserted through the second hole of the frame. 
     
     
         7 . The webbing adjustment device as claimed in  claim 1 , wherein
 the webbing adjustment device has
 a connecting strap connected to the frame by extending through the second hole of the frame; and 
 a connecting element connected to the connecting strap and connected to the front section of the webbing. 
   
     
     
         8 . The webbing adjustment device as claimed in  claim 2 , wherein
 the webbing adjustment device has
 a connecting strap connected to the frame by extending through the second hole of the frame; and 
 a connecting element connected to the connecting strap and connected to the front section of the webbing. 
   
     
     
         9 . The webbing adjustment device as claimed in  claim 3 , wherein
 the webbing adjustment device has
 a connecting strap connected to the frame by extending through the second hole of the frame; and 
 a connecting element connected to the connecting strap and connected to the front section of the webbing. 
   
     
     
         10 . The webbing adjustment device as claimed in  claim 2 , wherein
 the webbing adjustment device has
 a cover moveably mounted on the frame and having
 a base having
 a top end; 
 two side ends; and 
 a stop portion formed on the top end of the base and mounted above the first end portion of the slider; and 
 
 two side plates formed on the two side ends of the base respectively and each side plate having
 an inner surface; 
 a slide groove extending vertically and formed in the inner surface of the side plate; and 
 a retaining portion formed below the slide groove; and 
 
 
 a moveable gap formed between the stop portion of the cover and the first end portion of the slider; and 
   the frame has
 two side edges beside the first hole and inserted into the two slide grooves of the cover respectively. 
   
     
     
         11 . The webbing adjustment device as claimed in  claim 3 , wherein
 the webbing adjustment device has
 a cover moveably mounted on the frame and having
 a base having
 a top end; 
 two side ends; and 
 a stop portion formed on the top end of the base and mounted above the first end portion of the slider; and 
 
 two side plates formed on the two side ends of the base respectively and each side plate having
 an inner surface; 
 a slide groove extending vertically and formed in the inner surface of the side plate; and 
 a retaining portion formed below the slide groove; and 
 
 
 a moveable gap formed between the stop portion of the cover and the first end portion of the slider; and 
   the frame has
 two side edges beside the first hole and inserted into the two slide grooves of the cover respectively. 
   
     
     
         12 . The webbing adjustment device as claimed in  claim 10 , wherein the front section of the webbing is inserted through the second hole of the frame. 
     
     
         13 . The webbing adjustment device as claimed in  claim 11 , wherein the front section of the webbing is inserted through the second hole of the frame. 
     
     
         14 . The webbing adjustment device as claimed in  claim 10 , wherein
 the webbing adjustment device has
 a connecting strap connected to the frame by extending through the second hole of the frame; and 
 a connecting element connected to the connecting strap and connected to the front section of the webbing. 
   
     
     
         15 . The webbing adjustment device as claimed in  claim 11 , wherein
 the webbing adjustment device has
 a connecting strap connected to the frame by extending through the second hole of the frame; and 
 a connecting element connected to the connecting strap and connected to the front section of the webbing. 
   
     
     
         16 . The webbing adjustment device as claimed in  claim 1 , wherein
 a length of the first end portion and a length of the second end portion are both longer than a length of the frame;   the connecting portion has
 two connecting surfaces formed in the connecting portion, facing each other, and both connected to the first end portion and the second end portion; 
 a protrusion formed on the second end portion, extending toward the first end portion, located in the through groove of the slider, and inserted through the first hole of the frame; and 
 two spaces formed through the connecting portion from the top surface of the connecting portion to the bottom surface of the connecting portion and located between the protrusion and one of the connecting surfaces; and 
   the frame has
 two side edges inserted through the two spaces of the connecting portion respectively. 
   
     
     
         17 . The webbing adjustment device as claimed in  claim 16 , wherein the front section of the webbing is inserted through the second hole of the frame.