Coreless motor

A coreless motor, comprising:

• a rotating shaft;
• a coil that is formed by winding a conductive wire into a cylindrical shape, the coil being configured to rotate together with the rotating shaft;
• and
• a cylindrical magnet that is arranged inside or outside the cylindrical coil,
• wherein a single winding of the coil is formed into a hexagonal shape comprising a parallel portion extending parallel to an axial direction of the rotating shaft and two oblique portions that incline to a plane perpendicular to the axial direction and are connected to both ends of the parallel portion,
• the oblique portions are curved to have a convex from the inside to the outside of the single winding of the coil, and
• a tangent angle between a tangent line of the oblique portion that is drawn from a vertex connecting ends of the two adjacent oblique portions of the single winding of the coil and a plane perpendicular to the axial direction is set to a range of 20 degrees or more and 35 degrees or less.

A coreless motor, comprising:

• a rotating shaft;
• a coil that is formed by winding a conductive wire into a cylindrical shape, the coil being configured to rotate together with the rotating shaft;
• and
• a cylindrical magnet that is arranged inside or outside the cylindrical coil,
• wherein a single winding of the coil is formed into a hexagonal shape including a parallel portion extending parallel to an axial direction of the rotating shaft and two oblique portions that incline to a plane perpendicular to the axial direction and are connected to both ends of the parallel portion,
• the oblique portions are curved to have a convex from the inside to the outside of the single winding of the coil,
• a tangent angle between a tangent line of the oblique portion that is drawn from a vertex connecting ends of the two adjacent oblique portions of the single winding of the coil and a plane perpendicular to the axial direction is set to a range of 15 degrees or more and 50 degrees or less, and
• a ratio (β/α) of a first angle interval (β) between the two parallel portions of the single winding of the coil to a second angle interval (α) between magnetic poles of the magnet is set to a range of greater than 1.00 and 1.25 or less.

A coreless motor, comprising:

• a rotating shaft;
• a coil that is formed by winding a conductive wire into a cylindrical shape, the coil being configured to rotate together with the rotating shaft;
• and
• a cylindrical magnet that is arranged inside or outside the cylindrical coil,
• wherein a single winding of the coil is formed into a hexagonal shape comprising a parallel portion extending parallel to an axial direction of the rotating shaft and two oblique portions that incline to a plane perpendicular to the axial direction and are connected to both ends of the parallel portion,
• the oblique portions are curved to have a convex from the inside to the outside of the single winding of the coil,
• a tangent angle between a tangent line of the oblique portion that is drawn from a vertex connecting ends of the two adjacent oblique portions of the single winding of the coil and a plane perpendicular to the axial direction is set to a range of 15 degrees or more and 50 degrees or less,
• a ratio β/α of a first angle interval (β) between the two parallel portions of the single winding of the coil to a second angle interval (α) between magnetic poles of the magnet is set to a range of greater than 1.00 and 1.25 or less, and
• a ratio L1/L0 of a length (L1) of the parallel portion to a full length (L0) along the axial direction of the one winding of the coil is set to a range of 0.25 or more and 0.75 or less.

A coreless motor, comprising:

• a rotating shaft;
• a coil that is formed by winding a conductive wire into a cylindrical shape, the coil being configured to rotate together with the rotating shaft;
• and
• a cylindrical magnet that is arranged inside or outside the cylindrical coil,
• wherein a single winding of the coil is formed into a hexagonal shape comprising a parallel portion extending parallel to an axial direction of the rotating shaft and two oblique portions that incline to a plane perpendicular to the axial direction and are connected to both ends of the parallel portion,
• the oblique portions are curved to have a convex from the inside to the outside of the single winding of the coil,
• a tangent angle between a tangent line of the oblique portion that is drawn from a vertex connecting ends of the two adjacent oblique portions of the single winding of the coil and a plane perpendicular to the axial direction is set to a range of 20 degrees or more and 35 degrees or less,
• a ratio β/α of a first interval (β) between the two parallel portions of the single winding of the coil to a second angle interval (α) between magnetic poles of the magnet is set to a range of 1.05 or more and 1.10 or less, and
• a ratio L1/L0 of a length (L1) of the parallel portion to a full length (L0) along the axial direction of the one winding of the coil is set to a range of 0.25 or more and 0.45 or less.