| 摘要 |
<p>The present invention relates to a calibrator. The present invention comprises: a cylindrical base body (100) wherein an indicator (600) is combined to one end and an installation space (105) is formed in the inner side; a measurement body (300) which has a contact plunger (350) which is in contact with the inner circumference surface of an object to be measured by being inputted and outputted in an orthogonal direction of a longitudinal direction of the installation space (105) and is combined to the other end of the base body (100) corresponding to the other side of the indicator (600); a piston (500) which ascends and descends inside the installation space (105) and selectively operates the contact plunger in an ascending and descending process since an operation unit (530) protrudes from one end towards the measurement body (300); an elastic member (S) to provide elastic force to the piston (500) in a direction of the measurement body (300) by being inserted into the installation space (105); and an operation switch (250) which is installed on one side of the base body (100) and selectively moves the piston (500) in an indicator direction. In the present invention above, usability can be improved since the contact plunger (350) of the calibrator is maintained as a protruding state by the elastic force of the elastic member (S) and there is no necessity for the calibrator to be rotated to protrude the contact plunger (350) in a degree corresponding to the inner circumference surface of the object to be measured.</p> |
