Abstract: A positioning apparatus according to the present invention includes: a detector configured to detect that a movable object has moved from a first position to a second position; a data acquisition unit configured to acquire first position data, second position data, and virtual moving direction data indicating a moving direction of the movable object having moved from the first position to the second position in a virtual space; and a correction unit configured to correct the virtual moving direction data so that the moving direction of the movable object in the virtual space follows a first direction connecting the first position and the second position by using the first position data and the second position data. Therefore, deterioration of positioning accuracy of the movable object in the virtual space can be prevented.

Abstract: A printing device includes: a platen roller, a pair of bearings, and a holder. The platen roller has a rotational shaft extending in a first direction. The bearings rotatably support respective end portions of the rotational shaft. Each of the bearings includes an abutment portion. The holder includes a pair of fitting portions into which the bearings is respectively fitted. Each of the fitting portions includes: a receiving portion, an opening portion, and an engagement portion extending from the receiving portion. The receiving portion has an inner space configured to receive the corresponding bearing. The abutment portion is configured to abut against the engagement portion. In a case where an external force in a direction toward the opening portion is applied to the bearing, the engagement portion is configured to be deformed so as to reduce an area of the opening portion, thereby immovably engaging the bearing.

Abstract: A printing device includes: a platen roller having a rotational shaft, a pair of bearings, and a holder. The bearings rotatably support end portions of the rotational shaft. Each of the bearings includes: a support portion, and an engaging portion. The support portion has an outer circumferential surface. The engaging portion is provided at the outer circumferential surface of the support portion. The holder includes a pair of fitting portions. The bearings are fitted into the fitting portions, respectively. Each of the fitting portions includes: a receiving portion configured to receive the support portion, an opening portion, and an engagement portion. The engaging portion is engaged with the engagement portion, whereby an expanding deformation of the opening portion can be restrained in a case where an external force directed in a direction toward the opening portion in the first direction is applied to the bearings.

Abstract: A hanger has a support column having a protrusion. The protrusion has a first and a second protrusion formed to be protruding in opposite directions with each other on a second axial line that intersects orthogonally with a first axial line, and a third protrusion formed to be protruding on a third axial line that intersects orthogonally with the first axial line and the second axial line. A link portion has an accommodation portion for engaging and accommodating the protrusion. The hanger is linked with the link portion, such that a revolution within a first prescribed angle range around the first axial line is permitted, and a folding revolution that is a revolution within a second prescribed angle range around the second axial line is permitted when the support column is located at either one of both ends of the first prescribed angle range.

Abstract: A printing device includes: a platen roller having a rotational shaft, a pair of bearings, and a holder. The bearings rotatably support end portions of the rotational shaft. Each of the bearings includes: a support portion, and an engaging portion. The support portion has an outer circumferential surface. The engaging portion is provided at the outer circumferential surface of the support portion. The holder includes a pair of fitting portions. The bearings are fitted into the fitting portions, respectively. Each of the fitting portions includes: a receiving portion configured to receive the support portion, an opening portion, and an engagement portion. The engaging portion is engaged with the engagement portion, whereby an expanding deformation of the opening portion can be restrained in a case where an external force directed in a direction toward the opening portion in the first direction is applied to the bearings.

Abstract: A speaker includes: an open-backed speaker unit, a housing, and a fin unit. The housing is disposed so as to cover a rear side of the speaker unit, and forms a back cavity with the speaker unit. The fin unit is disposed in the back cavity, and includes an annular or arc-like fin, which approaches a rear side of the housing as going from a center of the speaker unit toward an outer diameter side thereof, and expands in diameter as separating from the speaker unit.

Abstract: A printing device includes: a platen roller, a pair of bearings, and a holder. The platen roller has a rotational shaft extending in a first direction. The bearings rotatably support respective end portions of the rotational shaft. Each of the bearings includes an abutment portion. The holder includes a pair of fitting portions into which the bearings is respectively fitted. Each of the fitting portions includes: a receiving portion, an opening portion, and an engagement portion extending from the receiving portion. The receiving portion has an inner space configured to receive the corresponding bearing. The abutment portion is configured to abut against the engagement portion. In a case where an external force in a direction toward the opening portion is applied to the bearing, the engagement portion is configured to be deformed so as to reduce an area of the opening portion, thereby immovably engaging the bearing.

Abstract: A hanger has a support column having a protrusion. The protrusion has a first and a second protrusion formed to be protruding in opposite directions with each other on a second axial line that intersects orthogonally with a first axial line, and a third protrusion formed to be protruding on a third axial line that intersects orthogonally with the first axial line and the second axial line. A link portion has an accommodation portion for engaging and accommodating the protrusion. The hanger is linked with the link portion, such that a revolution within a first prescribed angle range around the first axial line is permitted, and a folding revolution that is a revolution within a second prescribed angle range around the second axial line is permitted when the support column is located at either one of both ends of the first prescribed angle range.

Abstract: A speaker includes: an open-backed speaker unit, a housing, and a fin unit. The housing is disposed so as to cover a rear side of the speaker unit, and forms a back cavity with the speaker unit. The fin unit is disposed in the back cavity, and includes an annular or arc-like fin, which approaches a rear side of the housing as going from a center of the speaker unit toward an outer diameter side thereof, and expands in diameter as separating from the speaker unit.