Rotary type linear reciprocating motion device and applicator having the same

A rotary type linear reciprocating motion device comprising:

• a driving part rotatably driven by a motor;
• a rotating part installed at one surface of the driving part, the rotating part transferring a rotational force of the driving part to an applicator;
• and
• a reciprocating part installed at an other surface of the driving part, the reciprocating part converting the rotational force of the driving part into a linear reciprocating motion force, the reciprocating part transferring the linear reciprocating motion force to the applicator,
• wherein the driving part includes:
• a driving plate having both surfaces at which the rotating part and the reciprocating part are respectively installed;
• and
• a driving belt installed at an edge of the driving plate, the driving belt being in contact with a motor shaft of the motor to allow a driving force of the motor to be transferred to the driving plate by a frictional force,
• wherein the applicator includes:
• a brush-bar connected to the rotating part;
• and
• a brush coupled to an end portion of the brush-bar,
• wherein the rotating part includes:
• a worm shaft installed at one surface of the driving plate to be rotated together with the driving plate;
• a worm gear geared with a worm of the worm shaft to be rotated;
• a first spur gear connected to the worm gear in one rotating shaft direction of the worm gear;
• a second spur gear geared with the first spur gear, the second spur gear being provided on the same line as the brush-bar;
• and
• an operating shaft provided at one side of the second spur gear to be coupled to brush-bar, the operating shaft transferring a rotary motion force and a linear reciprocating motion force, and
• wherein the second spur gear is movable since the second spur gear is not restricted in an X-axis direction, and is slidable through both a rotary motion performed by the first spur gear and a linear reciprocating motion of the reciprocating part within a range of engagement with the first spur gear.