Snail and cam type breaks

Wallcome back Lets see that what is that snail and cam type 

For this type of two brake shoe In the middle Of shoe, Two cam fits From two sides On the baking plate 
Being a brake shoe on the cam, if the cam rotates then,  The brake shoe moves into the  Side of the drum, 
and Brake drum and shoe Gets  less Clearence between them 
this type of composition can be seen on small vehicle 

THANK YOU