Hydraulic switch and hydraulic brake system

A hydraulic switch, comprising:

• a casing, having a chamber and a liquid channel connected to the chamber;
• a first cable, having a first electrical connection portion, wherein the first cable is disposed through the casing, and the first electrical connection portion is located in the chamber;
• a second cable, having a second electrical connection portion, wherein the second cable is disposed through the casing, and the second electrical connection portion is located in the chamber;
• an electrically conductive piston, disposed in the chamber and movable between an electrically connected position and an electrically disconnected position, wherein the electrically disconnected position is located closer to the liquid channel than the electrically connected position;
• when the electrically conductive piston is in the electrically connected position, the electrically conductive piston is in electrical contact with the first electrical connection portion and the second electrical connection portion so as to electrically connect the first cable with the second cable;
• when the electrically conductive piston is in the electrically disconnected position, the electrically conductive piston is spaced apart from the first electrical connection portion and the second electrical connection portion;
• and
• a first magnetic conductive component, disposed on the electrically conductive piston and configured to provide a magnetic force to move the electrically conductive piston toward the electrically disconnected position;
• wherein the hydraulic switch further comprises a second magnetic conductive component, the first magnetic conductive component and the second magnetic conductive component are magnets that are set to repel each other, and the second magnetic conductive component is disposed on the casing.