Braking device of linear guide

A braking device of a linear guide and having a braking slide seat mounted on the linear guide, said braking slide seat comprising:

• a braking rod perpendicular to the linear guide and having a front end capable of extending to make contact with the guide, said braking rod provided in a mid-segment with an insertion slot and in a rear end with an elastic element;
• and
• an urging rod disposed in a side opposite to said insertion slot of said braking rod such that said urging rod is connected with a piston which is driven by a power source whereby said urging rod is pushed by the piston in motion into said insertion slot of said braking rod so as to cause said braking rod to retreat from the braking state, said braking rod being pushed by the spring force of said elastic element to make contact with the guide so as to bring about a braking effect in the event of a power interruption.