| 摘要 |
PURPOSE: A connection point apparatus and a connection apparatus of a 3-position switch are provided which can operate more than two switches in 3-position(open-close-ground) states using one operation apparatus. CONSTITUTION: A connection point operation apparatus transfers an elastic force of a spring extended by a cam driving to a power axis(1), and a connection apparatus transfers a rotation force to a driving part of an arc extinguish part, being operated by the location change of the power axis of the connection point operation apparatus in series. With one operation apparatus and connection apparatus, the 3-position switch can operate more than two switches, and in case of converting to a motor-operated operation apparatus, it can be operated using one motor. Therefore, the apparatus can minimize the fabrication cost and the size of the product and can improve the reliability.
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