Constant pressure mechanism of contact

Application Number: 00108376
Application Date: 2000.05.11
Publication Number: 1273357
Publication Date: 2000.11.15
Priority Information: 1999/5/11 JP 129574/99
International: G01B3/22;G01B21/00
Applicant(s) Name: Mitutoyo Corp.
Inventor(s) Name: Nishina Shingo
Patent Agency Code: 31100
Patent Agent: fang xiaogong
Abstract A constant pressure mechanism of a probe (2A, 2B) for unidirectionally urging the probe in a predetermined direction by virtue of elastic force of a spring (10A, 10B, 14D, 14E) is provided, the constant pressure mechanism comprising: a first pulley (6A, 5B, 6C to 6E) rotatably supported around a central axis (4A, 4B) by an instrument stationary portion (3A, 3B); a rotation force urging mechanism (15) for urging the first pulley in a predetermined rotation direction; and a first wire (8A, 7B, 8C to 8E) having a first end fixed to the first pulley and a second end jointed to the probe. This invention even the distance of probe's move is long the invention can apply force to the probe approximately, and the bulk is small, weight is light.