Shield Support Structure of Helmet

Abstract

A shield support structure of a helmet, wherein a first guide part and a second guide part are provided to be arranged with a support mechanism extending from a shell to a shield, wherein the support mechanism is provided at a side part of a shell to rotatably support the shield in an open and close direction, and the support mechanism guides open and close operation achieved by rotation of the shield from a fully-closed state to a fully-opened state, wherein the first guide part includes an immovable guide part provided at the shell and a guide rail part provided at the shield so as to engage with the immovable guide part, and the second guide part includes a movable guide part provided at the shield and a support rail part provided at the shell to engage with the movable guide part.

1 . A shield support structure of a helmet for opening and closing a front open part of a shell,
 comprising a support mechanism,   wherein the support mechanism includes a first guide part and a second guide part provided from the shell to the shield, the support mechanism rotatably supports the shield in an open and close direction at a side part of the shell, and guides an open and close operation achieved by a rotation of the shield from a fully-closed state to a fully-opened state,   the first guide part includes an immovable guide part provided at the shell and a guide rail part provided at the shield to engage with the immovable guide part, and the second guide part includes a movable guide part provided at the shield and a support rail part provided at the shell to engage with the movable guide part,   the guide rail part is provided at the side part of the shell and below a virtual rotational center of the shield that is set above an upper end of the shield, and is formed in an arc shape so as to be able to guide the shield to relate based on the virtual rotational center, and   the support rail part is provided below the virtual rotational center, and extends over a moving range of the movable guide part caused by the rotation of the shield.   
     
     
         2 . The shield support structure of the helmet according to  claim 1 , wherein the support rail part is formed in an arc shape capable of guiding the shield to rotate based on the virtual rotational center. 
     
     
         3 . The shield support structure of the helmet according to  claim 1 , wherein a part or all of the support rail part is configured in a direction for guiding the movable guide part so as to move the virtual rotational center with the rotation operation of the shield. 
     
     
         4 . The shield support structure of the helmet according to  claim 2 , wherein a part or all of the support rail part is configured in a direction for guiding the movable guide part so as to move the virtual rotational center with the rotation operation of the shield. 
     
     
         5 . The shield support structure of the helmet according to  claim 3 , wherein a part or all of the guide rail part is configured in a direction for guiding the movement of the virtual rotational center. 
     
     
         6 . The shield support structure of the helmet according to  claim 4 , wherein a part or all of the guide rail part is configured in a direction for guiding the movement of the virtual rotational center.