Driving device having sealing member with first and second annular protrusions

A driving device comprising:

• a stator that includes a coil having a plurality of leads;
• a rotor that is disposed to be rotatable relative to the stator;
• a housing that houses the stator and the rotor and defines a plurality of lead holes into which the plurality of leads are inserted;
• a controller that is disposed outside of the housing, the plurality of leads being connected to the controller;
• and
• a sealing member that includes a base, which is disposed in the housing between the plurality of lead holes and the coil, and a plurality of protrusions, which protrude from the base into the plurality of lead holes, the plurality of leads being inserted into the plurality of protrusions, wherein
• each of the plurality of protrusions includes a cylindrical portion, a cover portion, a first annular protrusion, and a second annular protrusion,
• the cover portion is disposed to cover an end of the cylindrical portion opposite to the base and to be in tightly contact with one of the plurality of leads,
• the first annular protrusion outwardly protrudes from the cylindrical portion between the base and the cover portion,
• the second annular protrusion outwardly protrudes from the cylindrical portion between the first annular protrusion and the cover portion,
• a region of each of the plurality of lead holes is defined as a fit region in which the first annular protrusion and the second annular protrusion are able to fit in a compressed state,
• the first annular protrusion is fit in the fit region in the compressed state,
• the second annular protrusion is offset from the fit region toward the controller or is fit in the fit region in the compressed state,
• a distance between an end portion of the fit region close to the coil and the first annular protrusion is defined as a first insertion distance,
• a distance between the end portion of the fit region close to the coil and the second annular protrusion is defined as a second insertion distance,
• the first insertion distance for the cylindrical portion of each of the plurality of protrusions is equal to each other even when the fit region of each of the lead holes is offset from each other in an axial direction, and
• the second insertion distance for the cylindrical portion of each of the plurality of protrusions is equal to each other even when the fit region of each of the lead holes is offset from each other in the axial direction.