Thk Co., Ltd.

Takashi Oshida

Yoshinobu Moriyuki

Tetsuhiro Nishide

Shuhei Yamanaka

Takashi Sakuyama

Hiroshi Kaneshige

Sho Taniguchi

An actuator whose total length can be reduced is provided. An actuator () includes: a casing (); a hollow shaft () rotatably supported by the casing () via a bearing (), the hollow shaft () including a bottom portion (); a screw shaft () coupled to the bottom portion () of the hollow shaft (), the screw shaft () sharing a common center line with the hollow shaft (); and a nut () threadedly connected to the screw shaft (). The nut () is capable of moving in an axial direction of the screw shaft () to enter between the hollow shaft () and the screw shaft ().

Actuator or suspension

Provided is an encoder device capable of reducing interference between a magnetic field generated in a reference mark and a magnetic field generated in a scale. An encoder device is provided with a reference mark and a head. The reference mark has: a first scale coil; and a second scale coil electrically connected to the first scale coil. The head has: a transmission coil that transmits an electromagnetic wave without any contact to the first scale coil; a reception coil that receives an electromagnetic wave without any contact from the second scale coil; and electric circuits that generate a pulse for generating an origin signal from the electromagnetic wave received by the reception coil, if the transmission coil faces the first scale coil and the reception coil faces the second scale coil.

Encoder apparatus and motion guide apparatus with encoder apparatus

A position detection apparatus is provided which eliminates the necessity of space to affix a scale to a track member. A track member of a motion guide apparatus is provided with a through hole into which a fastening member to fasten the track member to a base can be inserted. A carriage that is movably assembled to the track member via a rolling element is provided with magnets generating a magnetic field toward the track member. Magnetic sensors that detect a change in the magnetic fields of the magnets with the travel of the magnets relative to the track member are placed within the magnetic fields of the magnets.

Growing community of inventors

Tokyo, Japan

Takashi Oshida