Operation lever and grip

An operation lever comprising:

• a lever shaft;
• a grip arranged on an upper part of the lever shaft, said grip comprising:
• a grip main body capable of rotating relative to a center of the lever shaft by a predetermined angle;
• and
• an operation switch mounted to an upper part of the grip main body;
• said grip main body comprising:
• a lever shaft receiving opening arranged on a bottom part of the grip main body and allowing the upper part of the lever shaft to extend therethrough;
• an intrusion object discharge opening arranged on the bottom part of the grip main body, said intrusion object discharge opening being laterally offset from the lever shaft receiving opening;
• a rotation detection sensor arranged inside the grip main body and adapted to detect a rotation of the grip main body;
• an intrusion object discharge path adapted to guide intrusion objects entering from an area where the operation switch is mounted to the upper part of the grip main body to the intrusion object discharge opening while bypassing the rotation detection sensor;
• a first wall arranged inside the grip main body and located below the operation switch and comprising a passage allowing passage therethrough of intrusion objects entering from the area where the operation switch is mounted to the upper part of the grip main body;
• and
• a second wall having a directing surface adapted to direct intrusion objects that pass through the passage.

An operation lever for a construction machine, comprising:

• a lever shaft;
• a grip arranged on an upper part of the lever shaft, said grip comprising:
• a grip main body capable of rotating relative to a center of the lever shaft by a predetermined angle;
• and
• at least one switch mounted to an upper part of the grip main body;
• said grip main body comprising:
• a first opening arranged on a bottom part of the grip main body and allowing the upper part of the lever shaft to extend therethrough;
• a second opening arranged on the bottom part of the grip main body, said second opening being laterally offset from the first opening;
• a rotation detection sensor arranged inside the grip main body and adapted to detect a rotation of the grip main body;
• and
• plural internal passages arranged inside the grip main body which are sized and configured to guide intrusion objects entering from an area where the at least one switch is mounted to the upper part of the grip main body to the second opening while bypassing the rotation detection sensor.