Stud 1 slides in guide a of socket 2. When stud 1 is pressed, sleeve 5, connected to stud 1 by flexible link (tube) 4, moves along guide h of socket 7, releasing the camera shutter. Flexible wire 3 restricts the deformation of link 4, making it stiff enough to transmit a force. Spring 6 returns stud 1 to its initial position.
$3531$SFL,FD$