Abstract: A power supply unit mounting structure comprises two stepped lock pins provided at an opening of a power supply unit storage and a seal provided at the opening, wherein the power supply unit comprises a flange part and a lock module provided on the flange part, wherein the lock module comprises a lock knob which is rotatable, a lock plate provided at a tip of a rotation shaft of the lock knob, and a cam mechanism configured to displace the lock plate in an axial direction, wherein the power supply unit is inserted into the power supply unit storage, by rotating the lock knob, the lock plate is rotated, a rotation of the lock plate is restrained, by rotating the lock knob after restraining the rotation of the lock plate, the flange part is displaced to the opening side, the seal is pressed, and the opening is sealed.

Abstract: In a battery holder for mounting a battery in a surveying instrument, the battery comprises contacts on a front end surface and attachment grooves formed on both side surfaces along a lower surface thereof, wherein the battery holder comprises a flange part and a battery case which extends from the flange part, wherein the battery case comprises locking pieces which are formed like a cantilever at positions corresponding to the attachment grooves on both side surfaces respectively, wherein, by fitting the battery in the battery case, the locking pieces engage with the attachment grooves through an elastic displacement, and the locking pieces hold the battery in the battery case, and wherein, by inserting the battery holder into a power supply unit storage of the surveying instrument, the locking pieces abut on a member on the power supply unit storage side, and the elastic displacement of the locking pieces is restrained.

Abstract: A power supply unit mounting structure comprises two stepped lock pins provided at an opening of a power supply unit storage and a seal provided at the opening, wherein the power supply unit comprises a flange part and a lock module provided on the flange part, wherein the lock module comprises a lock knob which is rotatable and of which axis displacement is restrained, a lock plate provided at a tip of a rotation shaft of the lock knob, and a cam mechanism configured to displace the lock plate in an axial direction, wherein the power supply unit is inserted into the power supply unit storage, by rotating the lock knob, the lock plate is rotated, a rotation of the lock plate is restrained, by rotating the lock knob after restraining the rotation of the lock plate, the flange part is displaced to the opening side, the seal is pressed, and the opening is sealed.

Abstract: In a battery holder for mounting a battery in a surveying instrument, the battery comprises contacts on a front end surface and attachment grooves formed on both side surfaces along a lower surface thereof, wherein the battery holder comprises a flange part and a battery case which extends from the flange part, wherein the battery case comprises locking pieces which are formed like a cantilever at positions corresponding to the attachment grooves on both side surfaces respectively, wherein, by fitting the battery in the battery case, the locking pieces engage with the attachment grooves through an elastic displacement, and the locking pieces hold the battery in the battery case, and wherein, by inserting the battery holder into a power supply unit storage of the surveying instrument, the locking pieces abut on a member on the power supply unit storage side, and the elastic displacement of the locking pieces is restrained.

Abstract: An optical axis tilting device for laser optical system is configured to include a lens barrel in which a laser optical system is disposed; a tilt frame provided with a tilt sensor, a tilt mechanism including a drive motor, a threaded shaft, a movable member, and a position detector; a leveling mechanism; a ball joint mechanism including a ball support portion in the lens barrel, a ball portion made of a magnetic material and supported between the ball support portion and the tilt frame, a conical recess formed in one of the ball support portion and the tilt frame, and a permanent magnet provided in the one of the ball support portion and the tilt frame; and a computing portion.

Abstract: An optical axis tilting device for laser optical system is configured to include a lens barrel in which a laser optical system is disposed; a tilt frame provided with a tilt sensor, a tilt mechanism including a drive motor, a threaded shaft, a movable member, and a position detector; a leveling mechanism; a ball joint mechanism including a ball support portion in the lens barrel, a ball portion made of a magnetic material and supported between the ball support portion and the tilt frame, a conical recess formed in one of the ball support portion and the tilt frame, and a permanent magnet provided in the one of the ball support portion and the tilt frame; and a computing portion.