Motor device

A motor device, comprising:

• a worm wheel which is housed within a hollow casing and is rotated by a motor;
• an output shaft which is rotatably supported by said hollow casing;
• a gear wheel fixed to said output shaft;
• a crank arm which rotates together with said worm wheel;
• a sector gear, including a meshing portion which is meshed with said gear wheel, which converts the continuous rotational motion of said crank arm into reciprocating oscillatory motion about said output shaft as a center for oscillation, and which reversibly rotates said gear wheel in a forward rotational direction and in a reverse rotational direction;
• and
• a pair of holding members which support the meshing state of said gear wheel and said meshing portion of said sector gear in a thickness direction thereof, and which oscillate around said output shaft as a center for oscillation;
• wherein said sector gear comprises a fixed shaft which supports and enables said pair of holding members to oscillate and which lies upon an oscillation path around said output shaft as a center for oscillation;
• and
• wherein one of said pair of holding members which confronts an inner wall of said hollow casing comprises at least three contacting portions which slide on said inner wall of said hollow casing, said at least three contacting portions not being aligned.

A motor device having a hollow casing in which a mechanism for converting continuous rotational motion of a rotating member which is rotated by a motor into reciprocating oscillatory motion and rotationally drives an output shaft in a forward rotational direction and in a reverse rotational direction, comprising:

• a gear wheel fixed to said output shaft;
• a driving force conversion member comprising a meshing portion which is meshed with said gear wheel, which converts continuous rotational motion of said rotation member into oscillatory motion around said output shaft as a center for oscillation, and which turns said gear wheel in the forward rotational direction and in the reverse rotational direction;
• and a pair of holding members which support the meshing state of said gear wheel and said meshing portion of said driving force conversion member in a thickness direction thereof, and which oscillate around said output shaft as a center for oscillation;
• wherein said driving force conversion member comprises a fixed shaft which supports and enables said pair of holding members to oscillate and which lies upon an oscillation path around said output shaft as a center for oscillation;
• wherein one of said pair of holding members which confronts an inner wall of said hollow casing comprises a contacting portion which slides on said inner wall of said hollow casing;
• wherein said one of said pair of holding members comprises a plurality of thickened portions, and a thinned down portion which connects together said thickened portions;
• and
• wherein said contacting portion is formed in each region of said thickened portion.

A motor device having a hollow casing in which a mechanism for converting continuous rotational motion of a rotating member which is rotated by a motor into reciprocating oscillatory motion and rotationally drives an output shaft in a forward rotational direction and in a reverse rotational direction, comprising:

• a gear wheel fixed to said output shaft;
• a driving force conversion member comprising a meshing portion which is meshed with said gear wheel, which converts continuous rotational motion of said rotation member into oscillatory motion around said output shaft as a center for oscillation, and which turns said gear wheel in the forward rotational direction and in the reverse rotational direction;
• and a pair of holding members which support the meshing state of said gear wheel and said meshing portion of said driving force conversion member in a thickness direction thereof, and which oscillate around said output shaft as a center for oscillation;
• wherein said driving force conversion member comprises a fixed shaft which supports and enables said pair of holding members to oscillate and which lies upon an oscillation path around said output shaft as a center for oscillation;
• wherein one of said pair of holding members which confronts an inner wall of said hollow casings comprises a contacting portion which slides on said inner wall of said hollow casing;
• and
• wherein said rotating member comprises a convex portion which contacts with another inner wall of said hollow casing which is opposed to said inner wall of said hollow casing with which said contacting portion is in contact.

A motor device having a hollow casing in which a mechanism for converting continuous rotational motion of a rotating member which is rotated by a motor into reciprocating oscillatory motion and rotationally drives an output shaft in a forward rotational direction and in a reverse rotational direction, comprising:

• a gear wheel fixed to said output shaft;
• a driving force conversion member comprising a meshing portion which is meshed with said gear wheel, which converts continuous rotational motion of said rotation member into oscillatory motion around said output shaft as a center for oscillation, and which turns said gear wheel in the forward rotational direction and in the reverse rotational direction;
• and a pair of holding members which support the meshing state of said gear wheel and said meshing portion of said driving force conversion member in a thickness direction thereof, and which oscillate around said output shaft as a center for oscillation;
• wherein said driving force conversion member comprises a fixed shaft which supports and enables said pair of holding members to oscillate and which lies upon an oscillation path around said output shaft as a center for oscillation;
• wherein one of said pair of holding members which confronts an inner wall of said hollow casing comprises a contacting portion which slides on said inner wall of said hollow casing;
• wherein said hollow casing includes a bearing for said output shaft;
• and
• wherein said bearing includes a flange portion which is in contact with the other one of said pair of holding members.