Activation system for wearable airbag

Abstract

An airbag system for protecting a body part of a user in case of an accident is provided, including an airbag arranged as a collar. The collar includes a first fastening body and a second fastening body. The first fastening body has at least one magnet arranged near at least one sensor, and the second fastening body includes a shield operable to magnetically shield the at least one sensor from the at least one magnet.

1 . Airbag system for protecting a body part of a user in case of an accident, comprising an airbag arranged as a collar, wherein said collar comprises a first fastening body and a second fastening body; and wherein
 said first fastening body comprises at least one magnet arranged near at least one sensor, and said second fastening body comprises a shield operable to magnetically shield said at least one sensor from said at least one magnet.   
     
     
         2 . The airbag system according to  claim 1 , wherein the system further comprises a control unit configured to:
 arrange the airbag system in an idle state when said at least one sensor_ detects a magnetic field of said at least one magnet; and   arrange the airbag system in an active state when said at least one sensor does not detect said magnetic field.   
     
     
         3 . The airbag system according to  claim 2 , wherein when the system is in the idle state, the control unit is configured to prevent the airbag from being inflated, and/or wherein when the system is in the active state, the control unit is configured to allow the airbag to be inflated. 
     
     
         4 . The airbag system according to  claim 1 , further comprising interlocking means arranged to connect ends of the collar, wherein said interlocking means comprise at least one of said fastening bodies. 
     
     
         5 . The airbag system according to  claim 1 , wherein said second fastening body is operable to engage with said first fastening body. 
     
     
         6 . The airbag system according to  claim 5 , wherein when said fastening bodies are engaged, said shield is arranged to magnetically shield said at least one sensor. 
     
     
         7 . The airbag system according to  claim 5 , wherein said first fastening body further comprises locking means to keep said second fastening body engaged. 
     
     
         8 . The airbag system according to  claim 7 , wherein said locking means are configured to engage with said shield. 
     
     
         9 . The airbag system according to  claim 7 , wherein said locking means comprise at least one spring-loaded protrusion arranged to engage with at least one receiving hole on said second fastening body. 
     
     
         10 . The airbag system according to  claim 1 , comprising at least two magnets arranged on different sides of the sensor. 
     
     
         11 . The airbag system according to  claim 1 , wherein said shield is shaped as a cup or cylinder. 
     
     
         12 . The airbag system according to  claim 1 , wherein said shield comprises metal. 
     
     
         13 . The airbag system according to  claim 1 , wherein said at least one sensor is a Hall sensor. 
     
     
         14 . The airbag system according to  claim 1 , wherein said first fastening body is a female connector and said second fastening body is a male connector. 
     
     
         15 . The airbag system according to  claim 1 , wherein said first fastening body further comprises an LED indicator. 
     
     
         16 . The airbag system according to  claim 15 , wherein said LED indicator displays a first color of light when the airbag system in an active state and a second color of light to indicate an error. 
     
     
         17 . The airbag system according to  claim 15 , wherein said second fastening body is operable to engage with said first fastening body;
 wherein said shield further comprises a transparent portion; and   
       wherein when said fastening bodies are engaged, said transparent portion is arranged to cover said LED indicator.