Motor device and wiper apparatus

A motor device comprising:

• a motor portion capable of rotating forward and in reverse;
• an output shaft;
• and
• a link mechanism drivingly coupled to the motor portion, the link mechanism being integrally assembled in the motor portion, the link mechanism rotating the output shaft in a reciprocating manner between a first reverse position and a second reverse position, and the first reverse position also serving as a stop position of the output shaft,
• wherein the link mechanism comprises:
• a first lever that is swung in a reciprocating manner by the motor portion;
• a third lever to which the output shaft is fixed so as to be integrally rotatable;
• and
• a second lever coupling the first lever to the third lever in such a manner as to make the output shaft rotatable,
• wherein the link mechanism sets a rotation angle range of the output shaft less than one half rotation, wherein a first straight line, on which the first lever and the second lever are aligned, and a first imaginary straight line, on which the first lever and the second lever are assumed to be aligned, are set, the first imaginary straight line being independently from the first straight line, wherein the output shaft is positioned at a first position in the case that the first lever and the second lever are aligned on the first straight line, and the output shaft is positioned at a first imaginary position in the case that the first lever and the second lever are aligned on the first imaginary straight line, wherein a second imaginary straight line, on which the second lever and the third lever are assumed to be aligned prior to the first imaginary position, is defined, and the output shaft is positioned at a second imaginary position in the case that the second lever and the third lever are aligned on the second imaginary straight line, and
• wherein the first reverse position is set to the first position, and the second reverse position is set to a position immediately before the second imaginary position.

A wiper apparatus comprising:

• a wiper that is rotated in a reciprocating manner between a lower reverse position and an upper reverse position, and the lower reverse position also serving as a stop position of the wiper;
• a motor device driving the wiper;
• and
• a wiper control circuit controlling the motor device,
• wherein the motor device comprises:
• a motor portion capable of rotating forward and in reverse;
• an output shaft to which the wiper is attached so as to be integrally rotatable;
• and
• a link mechanism drivingly coupled to the motor portion, the link mechanism being integrally assembled in the motor portion, and the link mechanism rotating the output shaft in a reciprocating manner,
• wherein the link mechanism comprises:
• a first lever that is swung in a reciprocating manner by the motor portion;
• a third lever to which the output shaft is fixed so as to be integrally rotatable;
• and
• a second lever coupling the first lever to the third lever in such a manner as to make the output shaft rotatable,
• wherein the link mechanism sets a rotation angle range of the output shaft less than one half rotation, wherein a first straight line on which the first lever and the second lever are aligned, and a first imaginary straight line, on which the first lever and the second lever are assumed to be aligned, are set, the first imaginary straight line being independently from the first straight line, wherein the output shaft is positioned at a first position in the case that the first lever and the second lever are aligned on the first straight line, and the output shaft is positioned at a first imaginary position in the case that the first lever and the second lever are aligned on the first imaginary straight line, wherein a second imaginary straight line, on which the second lever and the third lever are assumed to be aligned prior to the first imaginary position, is defined, and the output shaft is positioned at a second imaginary position in the case that the second lever and the third lever are aligned on the second imaginary straight line, and
• wherein the wiper control circuit sets the first reverse position to the first position, and sets the second reverse position to a position immediately before the second imaginary position.