Abstract: A method for maintenance checking of a dental handpiece is disclosed. The method comprises measuring in advance no-load current values of a drive motor, with a handpiece known as being in usable condition and a handpiece known as insufficiently maintained respectively connected thereto and operated in no-load condition, storing as reference data the no-load current values of the drive motor together with associated data relating to degree of maintenance, measuring a no-load current value of the drive motor with a dental handpiece to be checked connected thereto and operated in no-load condition, and determining whether the handpiece checked is usable, requires maintenance, or is unusable, by comparing the measured no-load current value with the reference data.

Abstract: A method for maintenance checking of a dental handpiece is disclosed. The method comprises measuring in advance no-load current values of a drive motor, with a handpiece known as being in usable condition and a handpiece known as insufficiently maintained respectively connected thereto and operated in no-load condition, storing as reference data the no-load current values of the drive motor together with associated data relating to degree of maintenance, measuring a no-load current value of the drive motor with a dental handpiece to be checked connected thereto and operated in no-load condition, and determining whether the handpiece checked is usable, requires maintenance, or is unusable, by comparing the measured no-load current value with the reference data.

Abstract: A removable unit is designed to enjoy a change of attitude relative to an apparatus body. The apparatus body is received on the surface of a desk at first rubber pads. The removable unit has a pair of second rubber pads on its bottom surface located at a position adjacent to the bottom surface of the apparatus body. The bottom surface of the electronic apparatus is in this manner spaced from the surface of the desk. When a piece of paper is inserted between the second rubber pad and the surface of the desk, the change of attitude of the removable unit allows the other second rubber pad to contact the surface of the desk. The removable unit absorbs the difference of elevation based on the change of attitude. The removable unit allows the second rubber pads to contact. The electronic apparatus suffers from less rattling.

Abstract: An electronic apparatus is received on the front surface of an enclosure. A connector is connected to the electronic apparatus. When the electronic apparatus is to be demounted, an operating body is pulled out from a retract position toward a pulled-out position. A movable member moves from a first position to a second position. The movable member at the second position serves to protrude lifting members out of the front surface of the enclosure, so that the lifting members urge the electronic apparatus upward. The connector is disconnected from the electronic apparatus. The movable member allows the movement of the operating body from the pulled-out position to the retract position while the movable member stays at the second position. The operating body returns to the retract position while the disconnection is maintained between the connector and the electronic apparatus.

Abstract: A second enclosure can be folded over a first enclosure based on the rotation around a rotation axis defined relative to the first enclosure. A protrusion member is guided on the second enclosure along a straight line between first and second positions. A receiving hole is defined in the first enclosure so as to receive the insertion of the protrusion member protruding out of the front or back surface of the second enclosure. Even if one end of the protrusion member collides against the first enclosure during the fold of the second enclosure over the first enclosure, the protrusion member is caused to move. The first enclosure is thus prevented from suffering from damages or scratches over the first enclosure.

Abstract: An electronic apparatus is received on the front surface of an enclosure. A connector is connected to the electronic apparatus. When the electronic apparatus is to be demounted, an operating body is pulled out from a retract position toward a pulled-out position. A movable member moves from a first position to a second position. The movable member at the second position serves to protrude lifting members out of the front surface of the enclosure, so that the lifting members urge the electronic apparatus upward. The connector is disconnected from the electronic apparatus. The movable member allows the movement of the operating body from the pulled-out position to the retract position while the movable member stays at the second position. The operating body returns to the retract position while the disconnection is maintained between the connector and the electronic apparatus.

Abstract: A removable unit is designed to enjoy a change of attitude relative to an apparatus body. The apparatus body is received on the surface of a desk at first rubber pads. The removable unit has a pair of second rubber pads on its bottom surface located at a position adjacent to the bottom surface of the apparatus body. The bottom surface of the electronic apparatus is in this manner spaced from the surface of the desk. When a piece of paper is inserted between the second rubber pad and the surface of the desk, the change of attitude of the removable unit allows the other second rubber pad to contact the surface of the desk. The removable unit absorbs the difference of elevation based on the change of attitude. The removable unit allows the second rubber pads to contact. The electronic apparatus suffers from less rattling.

Abstract: A second enclosure can be folded over a first enclosure based on the rotation around a rotation axis defined relative to the first enclosure. A protrusion member is guided on the second enclosure along a straight line between first and second positions. A receiving hole is defined in the first enclosure so as to receive the insertion of the protrusion member protruding out of the front or back surface of the second enclosure. Even if one end of the protrusion member collides against the first enclosure during the fold of the second enclosure over the first enclosure, the protrusion member is caused to move. The first enclosure is thus prevented from suffering from damages or scratches over the first enclosure.

Abstract: A rectangular screen is defined on the front surface of a second enclosure coupled to a first enclosure. The second enclosure rotates relative to the first enclosure around a first rotation axis established along a first side of the rectangular screen and around a second rotation axis defined within a plane perpendicular to the first rotation axis. A fingerprint sensor is located on the front surface of the second enclosure outside a second side of the rectangular screen intersecting with the first side. When the second enclosure takes an upright attitude relative to the first enclosure, or when the back surface of the second enclosure is received on the front surface of the first enclosure based on the rotation around the first and second axes, the authentication of fingerprints can reliably can be achieved in a facilitated manner irrespective of the relative position between the first and second enclosures.

Abstract: A support member is incorporated in a first enclosure. A rotating member is supported on the support member for relative rotation around a first rotation axis. A second enclosure is coupled to the rotating member for relative rotation around a second rotation axis extending along a plane perpendicular to the first rotation axis. A hinge cap having a predetermined elasticity covers over the rotating member. A protrusion formed on the hinge cap is engaged with the rotating member based on the elasticity of the hinge cap. When the second enclosure is folded over the first enclosure, either the front or back surface of the second enclosure can be received on the front surface of the first enclosure. Even if the user carries the electronic apparatus, the hinge cap is reliably prevented from rattling. Generation of noise can be avoided.