How does the spherical pan-tilt used on the photographic tripod realize automatic rebound by mechanical means?

If you want to realize the automatic rebound of the pan/tilt by mechanical means, there seems to be no other way except spring or hydraulic means. ...

However, the design of spring rebound is not adopted in the platform. ..... This possibility has been ruled out.

As for the hydraulic way to realize the rebound of the tripod head, it does exist ... The hydraulic tripod head realizes the automatic rebound of the tripod head through this principle.

However, there is no hydraulic design for spherical translation/tilt. Therefore, it is impossible to achieve rebound through hydraulic mode ... In fact, the spherical pan-tilt itself does not have rebound function. ..... adjust the translation/tilt position of the sphere, which is manually adjusted by the user. ...

Therefore, the spherical pan-tilt can't rebound automatically.

If users need a pan/tilt with automatic rebound function, please choose a hydraulic pan/tilt ... Two-dimensional hydraulic pan/tilt and three-dimensional hydraulic pan/tilt can realize automatic rebound. ...