Balance in commentaries on classics tongue mechanism and hot laboratory cave rolls out and changes over to device over to

The utility model provides a balance in commentaries on classics tongue mechanism and hot laboratory cave rolls out and changes over to device over to. Change the tongue lock, including lock seat, slider, commentaries on classics tongue, torsional spring and compression spring, and slide -bar, lead to over twisting spring and compression spring to and the design of the triangle -shaped spout of slider, it changes the tongue by launching to packing up to make slider or slide -bar take to, again by packing up to the in -process that launches, only need towards an orientation slide can, convenient operation is suitable for and carries out simple one action mechanical arm operating. To change tongue mechanism most likely and assemble to the gallows on to such an extent that the balance rolls out and changes over to the device over to, the power machinery arm snatchs the gallows, drives to roll out to change over to the device whereabouts over to and rise, can accomplish roling out of balance and change over to ov