Vertical tilting apparatus of tripod head

Claim 1

A torque changeover mechanism for a vertical tilting apparatus of a tripod head which incorporates a securing disk that maintains the horizontal state of a camera mounted thereon in balance with elastic bodies acting in opposition to each other at right and left ends of a horizontal shaft in the vertical tilting apparatus, said torque changeover mechanism comprising: a first unit incorporating the horizontal shaft and having a plurality of first damp adjusting plates and first intermediate bodies wherein the first change adjusting plates and the first intermediate bodies are concentrically and alternatingly arranged with each other along the longitudinal axis of the shaft, the first damp adjusting plates and the first intermediate bodies being securely fit with the shaft; a second unit having ring-shaped second intermediate bodies and second damp adjusting plates wherein the second intermediate bodies and second damp adjusting plates are concentrically and alternatingly arranged with each other relative to the longitudinal axis of the shaft, said first unit being inter-engaged with said second unit such that each first damp adjusting plate is co-axially positioned with a corresponding second intermediate body along a first plane and each first intermediate body is co-axially positioned with a corresponding second damp adjusting plate along a second plane; a unit case for holding and sealing therein said inter-engaged first and second units, said second unit being securely fit in said unit case and said unit case having a plurality of securing holes defined along a radius on a surface of said unit case; a unit securing pin releasably insertable into any of the securing holes on said unit case for securing said first and second units to allow torque balance adjustment; and viscous fluid filled into said unit case and between said inter-engaged first and second units.