Elasticity demonstration device for physics teaching

The utility model discloses an elasticity demonstration device for physics teaching, including spherical shell, ruler, base, supporting leg, vacuum meter and barrel, the top of spherical shell is equipped with the evacuation and connects, the bottom turn -on connection of spherical shell has the barrel, sealed being fixed in on the base in bottom of barrel, the inside cooperation of barrel is slided and is equipped with the piston, elastic ball has been placed to the upside of piston, the bottom of piston is equipped with the pull rod that extends to the base downside, be equipped with the scale on the pull rod, the inboard of barrel is still overlapped on the pull rod and is equipped with the spring, the bottom of pull rod is equipped with the handle, the vacuum meter is still installed on the right side of barrel on the base, the right side of spherical shell still is equipped with the ruler on the base, the bottom outer lane of base is equipped with a plurality of supporting legs. The utility model disclos