Safety device for car seat

Abstract

The object of the present invention is to provide a safety device for car seat which lies down instantaneously and converts a infant, a child, or an old person into a safe stance, reacting with an impact given in a front/rear collision, so as to protect the infant, child or old person safely against the impact in the front/rear collision. To achieve this object, the present invention comprises a seat for infant/child installed on a conventional car seat and lying down with reacting to the impact and sliding forward, a locking member maintaining a normal stance of the seat for infant/child, and a impact reaction member releasing a locking between the seat for infant/child and the locking member as the impact occurs. Therefore, by having the seat for infant/child lain down against the transmitted impact in the front/rear collision, the danger from the impact could be avoided, and thus the infant, child or old person could be protected more safely.

What is claimed is:  
     
         1 . A safety device for car seat comprising: 
 a seat member installed on a conventional car seat and lying down, with sliding forward by a reaction force relative to an impact; and    a locking member maintaining a raised normal stance of the seat member.    
     
     
         2 . A device according to  claim 1 , wherein the seat member includes a back member and a stand member which are connected by a shaft so that it could unfold or fold according to the forward/backward sliding movement of the stand member.  
     
     
         3 . A device according to  claim 1 , wherein the locking member is a ratchet lever being fixed by pin, having a ratchet projection at one end thereof which is engaged with one of ratchet grooves on a bottom surface of the seat member, and releasing a locking with the seat member with a rear end thereof being pushed upward by a impact reaction ball.  
     
     
         4 . A device according to  claim 2 , wherein the seat member includes a seat body which could be pulled forward so as to protect the legs of a person seated thereon.  
     
     
         5 . A device according to  claim 1 , wherein the seat member is installed on a sliding contact surface of a seat stand to be able to slide forward or backward thereon, maintaining a predetermined height from the seat.  
     
     
         6 . A device according to  claim 2 , wherein the seat member is installed on a sliding contact surface of a seat stand to be able to slide forward or backward thereon, maintaining a predetermined height from the seat.  
     
     
         7 . A device according to  claim 2 , wherein a front portion of the stand member is formed to be higher than a rear portion thereof so that the seat member on the stand member maintains the raised normal stance without the locking member.  
     
     
         8 . A device according to  claim 1 , wherein the locking member includes a locking ball engaged with one of ball-engaging grooves on the bottom surface of the seat member, a locking spring providing the locking ball with the vertical elastic force, and a housing receiving the locking ball and locking spring.