Patent Description:
A clothes treatment apparatus refers to all kinds of apparatuses for maintaining or treating clothes, such washing, drying, and dewrinkling them, at home or at a laundromat. Examples of clothes treatment apparatuses include a washer for washing clothes, a dryer for drying clothes, a washer-dryer which performs both washing and drying functions, a refresher for refreshing clothes, and a steamer for removing unnecessary wrinkles in clothes.

More specifically, the refresher is a device used for keeping clothes crisp and fresh, which performs functions like drying clothes, providing fragrance to clothes, preventing static cling on clothes, removing wrinkles from clothes, and so on. The steamer is generally a device that provides steam to clothes to remove wrinkles from them, which can remove wrinkles from clothes in a more delicate way, without the hot plate touching the clothes like in traditional irons. There is a known clothes treatment apparatus equipped with both the refresher and steamer functions, that functions to remove wrinkles and smells from clothes put inside it by using steam and hot air.

There is also a known clothes treatment apparatus that functions to smooth out wrinkles in clothes by vibrating (reciprocating) a hanging bar for clothes in a predetermined direction.

<CIT> discloses a laundry treating apparatus including a hanger bar arranged in a treating chamber, a driving part provided on an outside of the treating chamber to generate a rotational force, a power transmitting part transmitting the rotational force of the driving part, and a power converting part converting the rotational force transmitted by the power transmitting part to reciprocate the hanger bar. When the motor rotates the power converting portion also rotates with an identically rotational direction of the motor.

<CIT> relates to a clothes drying cabinet provided with a shaker assembly including a motor, a single eccentric drive weight and a hanger bar. The single eccentric drive weight coupled to the motor is connected to the hanger bar and causes the hanger bar to be vibrated. Therefore, the shaking direction of the hanger bar is random.

<CIT> relates to a pulsator moved up and down by both eccentric weights that rotate in opposite directions. Each gear connects to each weight to covert the rotational direction of the motor into the perpendicular rotation of each weight. During rotation, both weights lie in the same direction or in opposite directions. Accordingly, the pulsator moves along a vertical direction submerged in stored water of the drum. However, the vertical reciprocation of the pulsator does not wash clothes directly but assists a motion of the vibrator using low-frequency vibration for washing the clothes in the water.

A problem with the conventional art is that unnecessary vibrations occur in other directions than the direction of vibration when the hanging bar is vibrated. A first aspect of the present invention is to minimize unnecessary vibrations by solving this problem.

A second aspect of the present invention is to minimize unnecessary vibrations and efficiently increase the excitation force in the direction of vibration applied to the hanging bar.

Another problem with the conventional art is that amplitude is maintained even if the vibration frequency of the hanging bar is changed, thus putting stress on items. A third aspect of the present disclosure is reduce the stress on items caused by a change of frequency by solving this problem.

A fourth aspect of the present invention is to allow the hanging bar to move in a vibrating motion by adjusting it to various vibration frequencies and amplitudes when the hanging bar vibrates.

Through the above means to solve the problems, the centrifugal force F1 of the first eccentric portion and the centrifugal force F2 of the second eccentric portion may reinforce each other and apply an excitation force Fo to the hanger body, if they cause a rotation of the vibrating body around the center axis, whereas the centrifugal force F1 and the centrifugal force F2 may offset each other and suppress vibrations generated by centrifugal force not related to the generation of excitation force Fo, if they cause no rotation of the vibrating body around the center axis (see <FIG>).

It is possible to further minimize unnecessary vibrations generated in a direction (+Y, -Y) perpendicular to a predetermined vibration direction (+X, -X), because the centrifugal force F1 and the centrifugal force F2 are set to "completely offset" each other.

The first eccentric portion and the second eccentric portion are configured to rotate at the same angular speed, thereby allowing for periodic reinforcement and offsetting of the centrifugal forces F1 and F2 caused by the rotation of the first eccentric portion and second eccentric portion.

The angular speed of the first eccentric portion and the angular speed of the second eccentric portion are set equal but in opposite directions, thereby making it easy for the centrifugal force F1 of the first eccentric portion and the centrifugal force F2 of the second eccentric portion to reinforce or offset each other repeatedly.

The first eccentric portion and the second eccentric portion are configured to rotate around the same axis of rotation. Accordingly, the point of action at which the centrifugal force F1 of the first eccentric portion and the centrifugal force F2 of the second eccentric portion are applied can be positioned on a single rotational axis Ow1 and Ow2, the centrifugal force F1 and the centrifugal force F2 can efficiently reinforce and offset each other, and it is possible to prevent a local moment load created by the horizontal distance difference between the point of action of the centrifugal force F1 and the point of action of the centrifugal force F2.

Since the hanger driving unit is fixed to the hanger body, in a position between the center of mass of the motor and the first rotational axis, this can reduce torsion caused by the center of mass of the motor when an excitation force is transmitted to the hanger body from the vibration module, thereby creating more stable vibrating motion.

To explain the present disclosure, a description will be made below with respect to a spatial orthogonal coordinate system where X, Y, and Z axes are orthogonal to each other. Each axis direction (X-axis direction, Y-axis direction, and Z-axis direction) refers to two directions in which each axis runs. Each axis direction with a `+' sign in front of it (+X-axis direction, +Y-axis direction, and +Z-axis direction) refers to a positive direction which is one of the two directions in which each axis runs. Each axis direction with a '-' sign in front of it (-X-axis direction, -Y-axis direction, and -Z-axis direction) refers to a negative direction which is the other of the two directions in which each axis runs.

The terms mentioned below to indicate directions such as "front(+Y)/back(-Y)/left(+X)/right(-X)/up(+Z)/down(-Z)" are defined by the X, Y, and Z coordinate axes, but they are merely used for a clear understanding of the present disclosure, and it is obvious that the directions may be defined differently depending on where the reference is placed.

The terms with ordinal numbers such as "first", "second", "third", etc. added to the front are used to describe constituent elements mentioned below, are intended only to avoid confusion of the constituent elements, and are unrelated to the order, importance, or relationship between the constituent elements. For example, an embodiment including only a second component but lacking a first component is also feasible.

Th singular forms used herein are intended to include plural forms as well, unless the context clearly indicates otherwise.

Referring to <FIG>, and <FIG>, a clothes treatment apparatus <NUM> according to the invention comprises a frame10 placed on a floor on the outside or fixed to a wall on the outside. The frame <NUM> has a treatment space <NUM> for storing clothes. The clothes treatment apparatus <NUM> comprises a supply part <NUM> for supplying at least one among air, steam, a deodorizer, and an anti-static agent to clothes. The clothes treatment apparatus <NUM> comprise a hanger module <NUM>, <NUM>, and <NUM> provided to hang clothes or clothes hangers. The hanger module <NUM>, <NUM>, and <NUM> is supported by the frame <NUM>. The clothes treatment apparatus <NUM> comprises a vibration module <NUM>, <NUM>, and <NUM> for generating vibration. The vibration module <NUM>, <NUM>, and <NUM> vibrates the hanger module <NUM>, <NUM>, and <NUM>. The clothes treatment apparatus <NUM> comprises at least one elastic member <NUM> and <NUM> configured to elastically deform or regain its elasticity when the hanger module <NUM>, <NUM>, and <NUM> moves. The elastic member <NUM> and <NUM> is configured to elastically deform or regain its elasticity when the vibration module <NUM>, <NUM>, and <NUM> moves. The clothes treatment apparatus <NUM> comprises a supporting member <NUM> and <NUM> for supporting one end of the elastic member <NUM> and <NUM>. The supporting member <NUM> and <NUM> may movably support the vibration module <NUM>, <NUM>, and <NUM>. The supporting member <NUM> and <NUM> may be fixed to the frame <NUM>. The clothes treatment apparatus <NUM> may comprise a control part (not shown) for controlling the operation of the supply part <NUM>. The control part may control whether to operate the vibration module <NUM>, <NUM>, and <NUM> or not and its operating pattern. The clothes treatment apparatus <NUM> may further comprise a clothes recognition sensor (not shown) for sensing clothes contained inside the treatment space <NUM>.

The frame <NUM> forms the external appearance. The frame <NUM> forms the treatment space <NUM> in which clothes are stored. The frame <NUM> comprises a top frame <NUM> forming the top side, a side frame <NUM> forming the left and right sides, and a rear frame (not shown) forming the rear side. The frame <NUM> comprises a base frame (not shown) forming the bottom side.

The frame <NUM> may comprise an interior frame 11a forming the inner side and an exterior frame 11b forming the outer side. The inner side of the interior frame 11a forms the treatment space <NUM>. A configuration space <NUM> is formed between the interior frame 11a and the exterior frame 11b. The vibration module <NUM>, <NUM>, and <NUM> may be disposed within the configuration space <NUM>. The elastic member <NUM> and <NUM> and the supporting member <NUM> and <NUM> may be disposed within the configuration space <NUM>.

The treatment space <NUM> is a space in which air (for example, hot air), steam, a deodorizer, and/or an anti-static agent is applied to clothes so as to change physical or chemical properties of the clothes. Clothes treatment may be done on the clothes in the treatment space <NUM> by various methods - for example, applying hot air to the clothes in the treatment space <NUM> to dry the clothes, removing wrinkles on the clothes with steam, spraying a deodorizer to clothes to give them a fragrance, spraying an anti-static agent to clothes to prevent static cling on them.

At least part of the hanger module <NUM>, <NUM>, and <NUM> is disposed within the treatment space <NUM>. A hanger body <NUM> and <NUM> is disposed within the treatment space <NUM>. One side of the treatment space <NUM> is open so that clothes can be taken in and out, and the open side is opened or closed by a door <NUM>. When the door <NUM> is closed, the treatment space <NUM> is separated from the outside, and when the door <NUM> is opened, the treatment space <NUM> is exposed to the outside.

The supply part <NUM> may supply air into the treatment space <NUM>. The supply part <NUM> may circulate the air in the treatment space <NUM> while supplying it. Specifically, the supply part <NUM> may draw in air from inside the treatment space <NUM> and discharge it into the treatment space <NUM>. The supply part <NUM> may supply outside air into the treatment space <NUM>.

The supply part <NUM> may supply air that has undergone a predetermined treatment process into the treatment space <NUM>. For example, the supply part <NUM> may supply heated air into the treatment space <NUM>. The supply part <NUM> also may supply cooled air into the treatment space <NUM>. Moreover, the supply part <NUM> may supply untreated air into the treatment space <NUM>. Further, the supply part <NUM> may add steam, a deodorizer, or an anti-static agent to air and supply the air into the treatment space <NUM>.

The supply part <NUM> may comprise an air intake opening 20a through which air is drawn in from inside the treatment space <NUM>. The supply part <NUM> may comprise an air discharge opening 20b through which air is discharged into the treatment space <NUM>. The air drawn in through the air intake opening 20a may be discharged through the air discharge opening 20b after a predetermined treatment. The supply part <NUM> may comprise a steam spout 20c for spraying steam into the treatment space <NUM>. The supply part <NUM> may comprise a heater (not shown) for heating drawn-in air. The supply part <NUM> may comprise a filter (not shown) for filtering drawn-in air. The supply part <NUM> may comprise a fan (not shown) for pressurizing air.

The air and/or steam supplied by the supply part <NUM> is applied to the clothes stored in the treatment space <NUM> and affects the physical or chemical properties of the clothes. For example, the tissue structure of the clothes is relaxed by hot air or steam, so that the wrinkles are smoothed out, and an unpleasant odor is removed as odor molecules trapped in the clothes react with steam. In addition, the hot air and/or steam generated by the supply part <NUM> may sterilize bacteria present in the clothes.

Referring to <FIG>, <FIG>, <FIG>, and <FIG>, the hanger module <NUM>, <NUM>, and <NUM> may be disposed above the treatment space <NUM>. The hanger module <NUM>, <NUM>, and <NUM> is provided to hang clothes or clothes hangers. The hanger module <NUM>, <NUM>, and <NUM> is supported by the frame <NUM>. The hanger module <NUM>, <NUM>, and <NUM> is movable. The hanger module <NUM>, <NUM>, and <NUM> is connected to the vibration module <NUM>, <NUM>, and <NUM> and receives vibrations from the vibration module <NUM>, <NUM>, and <NUM>.

The hanger module <NUM>, <NUM>, and <NUM> comprises a hanger body <NUM> and <NUM> provided to hang clothes or clothes hangers. In this exemplary embodiment, the hanger body <NUM> and <NUM> may be formed with locking grooves 31a for hanging clothes hangers, and, in another exemplary embodiment, the hanger body <NUM> and <NUM> may be formed with hooks (not shown) or the like so that clothes are hung directly on them.

The hanger body <NUM> and <NUM> is supported by the frame <NUM>. The hanger body <NUM>, and <NUM> may be connected to the frame <NUM> through a hanger moving portion <NUM> and a hanger supporting portion <NUM>. The hanger body <NUM> and <NUM> is configured to move with respect to the frame <NUM>. The hanger body <NUM> and <NUM> is configured to move (vibrate) with respect to the frame <NUM> in a predetermined vibration direction (+X, -X). The hanger body <NUM> and <NUM> may vibrate with respect to the frame <NUM> in the vibration direction (+X, -X). The hanger body <NUM> and <NUM> reciprocates in the vibration direction (+X, -X) by the vibration module <NUM>, <NUM>, and <NUM>. The hanger module <NUM>, <NUM>, and <NUM> reciprocates while hanging in an upper portion of the treatment space <NUM>.

The hanger body <NUM> and <NUM> may extend longitudinally in the vibration direction (+X, -X). A plurality of locking grooves 31a may be disposed on the upper side of the hanger body <NUM> and <NUM>, spaced apart from each other, in the vibration direction (+X, -X). The locking grooves 31a may extend in a direction (+Y, -Y) intersecting the vibration direction (+X, -X).

The hanger module <NUM>, <NUM>, and <NUM> may comprise a hanger moving portion <NUM> which movably supports the hanger body <NUM> and <NUM>. The hanger moving portion <NUM> is movable in the vibration direction (+X, -X). The hanger moving portion <NUM> may be made of a flexible material so as to make the hanger body <NUM> and <NUM> move. The hanger moving portion <NUM> may comprise an elastic member that is elastically deformable when the hanger body <NUM> and <NUM> moves. The upper end of the hanger moving portion <NUM> is fixed to the frame <NUM>, and the lower end is fixed to the hanger body <NUM> and <NUM>. The hanger moving portion <NUM> may extend vertically. The upper end of the hanger moving portion <NUM> rests on a hanger supporting portion <NUM>. The hanger moving portion <NUM> connects the hanger supporting portion <NUM> and the hanger body <NUM> and <NUM>. The hanger moving portion <NUM> is configured to vertically penetrate a hanger guide portion <NUM>. The length of a horizontal cross-section of the hanger moving portion <NUM> in the vibration direction (+X, -X) is shorter than its length in the direction (+Y, -Y) perpendicular to the vibration direction (+X, -X).

The hanger module <NUM>, <NUM>, and <NUM> comprises a hanger supporting portion <NUM> fixed to the frame <NUM>. The hanger supporting portion <NUM> secures the hanger moving portion <NUM> to the frame <NUM>. The hanger supporting portion <NUM> may be fixed to the interior frame 11a. The upper end of the hanger moving portion <NUM> may be locked and hung on the hanger supporting portion <NUM>. The hanger supporting portion <NUM> may be formed in the shape of a horizontal plate, and the hanger moving portion <NUM> may be configured to penetrate the hanger supporting portion <NUM>.

The hanger module <NUM>, <NUM>, and <NUM> may further comprise a hanger guide portion <NUM> for guiding the position of the hanger moving portion <NUM>. The hanger guide portion <NUM> is fixed to the frame <NUM>. The gap between the upper side of the hanger guide portion <NUM> and the hanger moving portion <NUM> may be sealed. The lower portion of the hanger guide portion <NUM> has an upward recess formed in it, and the hanger moving portion <NUM> may move in the vibration direction (+X, -X) within the upward recess of the hanger guide portion <NUM>.

The vibration module <NUM>, <NUM>, and <NUM> comprises a hanger driving unit <NUM> and <NUM> connected to the hanger module <NUM>, <NUM>, and <NUM>. The hanger body <NUM> and <NUM> comprises a hanger driven unit 331b and 431b connected to the hanger driving unit <NUM> and <NUM>.

Referring to <FIG> and <FIG>, the hanger driving unit <NUM> and hanger driven unit 331b according to a first exemplary embodiment of the present disclosure will be described below. Either the hanger driving unit <NUM> or the hanger driven unit 331b has a slit that extends in the direction (+Y, -Y) intersecting the vibration direction (+X, -X), and the other has a protruding portion that protrudes in parallel with a center axis Oc to be described later and is inserted into the slit. In this exemplary embodiment, the hanger driven unit 331b has a slit 331bh that extends in the direction (+Y, -Y), and the hanger driving unit <NUM> comprises a protruding portion 358a that protrudes downward and is inserted into the slit 331bh. Although not shown, another exemplary embodiment may be given in which the hanger driven unit has a slit that extends in the direction (+Y, -Y) and the hanger driving unit comprises a protruding portion that protrudes upward and is inserted into the slit of the hanger driving unit.

In the first exemplary embodiment, the protruding portion 358a protrudes in parallel with the center axis Oc. The protruding portion 358a extends along a predetermined connection axis Oh to be described later. The protruding portion 358a is disposed on the connection axis Oh. The slit 331bh is formed longitudinally in the direction (+Y, -Y) perpendicular to the vibration direction (+X, -X) of the hanger module <NUM>. When the protruding portion 358a rotates with respect to the center axis Oc while inserted in the slit 331bh, the protruding portion 358a moves relative to the slit 331bh in the perpendicular direction (+Y, -Y), causing the hanger body <NUM> to reciprocate in the vibration direction (+X, -X). In the partial cross-sectional views of <FIG>, the direction in which the protruding portion 358a inserted in the slit 331bh moves in an arc (rotates) within a predetermined range is indicated by an arrow, and therefore the range of movement of the hanger driven unit 331b vibrating in the left-right direction (+X, -X) is indicated by a dotted line.

Referring to <FIG>, the hanger driving unit <NUM> and hanger driven unit 431b according to a second exemplary embodiment will be described below. The hanger driving unit <NUM> connects and holds together the vibrating body <NUM> and the hanger body <NUM>. The hanger driving unit <NUM> may connect and hold together a lower portion of the vibrating body <NUM> and the center of the hanger body <NUM>. Therefore, the vibrating body <NUM> and the hanger body <NUM> vibrate as a single unit.

In the second exemplary embodiment, the hanger driving unit <NUM> may extend in parallel with a center axis Oc. The hanger driving unit <NUM> may be in the shape of a bar. The hanger driving unit <NUM> may extend along a predetermined connection axis Oh to be described later. The hanger driving unit <NUM> may be disposed on the connection axis Oh. The hanger driven unit 431b may be in the shape of a casing that is open at the top. The hanger driving unit <NUM> is fixed to the hanger driven unit 431b. The upper end of the hanger driving unit <NUM> is fixed to the vibrating body <NUM>, and the lower end is fixed to the hanger driven unit 431b. When the hanger driving unit <NUM>, while fixed to the hanger driven unit 431b, reciprocates in the vibration direction (+X, -X) of the vibrating body <NUM>, the hanger body <NUM> reciprocates in the vibration direction (+X, -X), integrally with the vibrating body <NUM>. In the partial cross-sectional view of <FIG>, the direction in which the hanger driving unit <NUM> linearly reciprocates is indicated by an arrow, and therefore the range of movement of the hanger driven unit 431b vibrating in the left-right direction (+X, -X) is indicated by a dotted line.

Referring to <FIG>, the elastic member <NUM> and <NUM> is configured to elastically deform or regain its elasticity when the vibration module <NUM>, <NUM>, and <NUM> vibrates. The elastic member <NUM> and <NUM> is configured to elastically deform or regain its elasticity when a vibrating body <NUM> and <NUM> vibrates. The elastic member <NUM> and <NUM> may restrict the vibration of the vibration module <NUM>, <NUM>, and <NUM> to a predetermined range. The vibration pattern (amplitude and vibration frequency) of the vibration module <NUM>, <NUM>, and <NUM> may be determined by putting together the elastic force of the elastic member <NUM> and <NUM> and the centrifugal force of the first eccentric portion <NUM> and second eccentric portion <NUM>.

One end of the elastic member <NUM> and <NUM> is fixed to the vibration module <NUM>, <NUM>, and <NUM>, and the other end is fixed to a supporting member <NUM> and <NUM>. The elastic member <NUM> and <NUM> may comprise a spring or a mainspring. The supporting member <NUM> and <NUM> may comprise a tension spring, a compression spring, or a torsion spring.

Referring to <FIG>, the elastic member <NUM> according to the first exemplary embodiment is configured to elastically deform or regain its elasticity when the vibration module <NUM> rotates around the center axis Oc. The elastic member <NUM> is configured to elastically deform or regain its elasticity when the vibrating body <NUM> rotates around the center axis Oc. The elastic member <NUM> may restrict the vibration of the vibration module <NUM> to a predetermined angular range.

Referring to <FIG>, the elastic member <NUM> according to the second exemplary embodiment is configured to elastically deform or regain its elasticity when the vibration module <NUM> reciprocates in the vibration direction (+X, -X). The elastic member <NUM> is configured to elastically deform or regain its elasticity when the vibrating body <NUM> reciprocates in the vibration direction (+X, -X). The elastic member <NUM> may restrict the vibration of the vibration module <NUM> to a predetermined distance range.

Referring to <FIG>, the supporting member <NUM> and <NUM> is fixed to the frame <NUM>. The supporting member <NUM> and <NUM> may be fixed to the interior frame 11a. The supporting member <NUM> and <NUM> may support the elastic member <NUM> and <NUM>.

Referring to <FIG>, the supporting member <NUM> according to the first exemplary embodiment supports the vibration module <NUM>. The vibration module <NUM> may be supported by the interior frame 11a. The vibration module <NUM> may be fixed to the frame <NUM> by the supporting member <NUM>. The supporting member <NUM> movably supports the vibration module <NUM>. The supporting member <NUM> rotatably supports the vibration module <NUM>. The supporting member <NUM> supports the vibration module <NUM> in such a way as to make it movable around the center axis Oc. The supporting member <NUM> supports the vibrating body <NUM>. The vibrating body <NUM> may be connected to the frame <NUM> by the supporting member <NUM>.

Referring to <FIG>, the supporting member <NUM> according to the second exemplary embodiment does not need to support the vibration module <NUM>. The vibration module <NUM> may be supported by the hanger module <NUM>. The supporting member <NUM> may slidably support the vibration module <NUM>. The supporting member <NUM> may guide the vibration direction (+X, -X) of the vibration module <NUM>. The supporting member <NUM> may function as a guide that restricts the movement of the vibration module <NUM> in a direction other than a predetermined direction (+X, -X).

Referring to <FIG>, the vibration module <NUM>, <NUM>, and <NUM> will be briefly described below. The vibration module <NUM>, <NUM>, and <NUM> moves (vibrates) the hanger body <NUM> and <NUM>. The vibration module <NUM>, <NUM>, and <NUM> is connected to the hanger body <NUM> and <NUM>, and transmits vibrations from the vibration module <NUM>, <NUM>, and <NUM> to the hanger body <NUM> and <NUM>.

The vibration module <NUM>, <NUM>, and <NUM> may be disposed between the interior frame 11a and the exterior frame 11b. The interior frame 11a on the upper side may be recessed downward to form the configuration space <NUM>, and the vibration module <NUM>, <NUM>, and <NUM> may be disposed in the configuration space <NUM>.

The vibration module <NUM>, <NUM>, and <NUM> may be located above the treatment space <NUM>. The vibration module <NUM>, <NUM>, and <NUM> may be disposed above the hanger body <NUM> and <NUM>.

The vibration module <NUM>, <NUM>, and <NUM> comprises a vibrating body <NUM> and <NUM> configured to move with respect to the frame <NUM>. The vibrating body <NUM> and <NUM> forms the outer appearance of the vibration module <NUM>, <NUM>, and <NUM>.

A predetermined center axis Oc is preset on the vibrating body <NUM> according to the first exemplary embodiment. The vibrating body <NUM> is configured in such a way as to rotate around a predetermined center axis Oc where the position relative to the frame <NUM> is fixed. The supporting member <NUM> rotatably supports the vibrating body <NUM>. The vibrating body <NUM> may be configured to rotate only within a predetermined angular range. For example, the frame <NUM> or the supporting member <NUM> may comprise a limit portion that can come into contact with the vibrating body <NUM>, so as to restrict the range of rotation of the vibrating body <NUM>. In another example, the elastic force of the elastic member <NUM> increases as the vibrating body <NUM> rotates, thus limiting the range of rotation of the vibrating body <NUM>.

The center axis Oc is not preset on the vibrating body <NUM> according to the second exemplary embodiment. The position of the vibrating body <NUM> relative to the hanger body <NUM> is fixed. The hanger driving unit <NUM> connects and holds the vibrating body <NUM> and the hanger body <NUM> together. The vibrating body <NUM> may be configured to reciprocate only within a predetermined distance range. For example, the frame <NUM> or the supporting member <NUM> may comprise a limit portion that can come into contact with the vibrating body <NUM>, so as to restrict the range of reciprocating motion of the vibrating body <NUM>. In another example, the elastic force of the elastic member <NUM> increases as the vibrating body <NUM> moves, thus limiting the range of movement (vibration) of the vibrating body <NUM>.

The vibrating body <NUM> and <NUM> supports the motor <NUM>. The vibrating body <NUM> and <NUM> and the hanger driving unit <NUM> and <NUM> are fixed to each other. The vibrating body <NUM> and <NUM> supports a weight shaft <NUM>. The vibrating body <NUM> and <NUM> supports a first eccentric portion <NUM> and a second eccentric portion <NUM>. The vibrating body <NUM> and <NUM> may accommodate the first eccentric portion <NUM> and the second eccentric portion <NUM> in it.

The vibrating body <NUM> and <NUM> may comprise a weight casing 51b containing the first eccentric portion <NUM> and the second eccentric portion <NUM> in it. The weight casing 51b may comprise a first part 51b1 forming an upper portion and a second part 51b2 forming a lower portion. The second part 51b1 may form an inner space forming the bottom surface and peripheral surface, and the first part 51b1 may cover the top of the inner space. The first eccentric portion <NUM> and the second eccentric portion <NUM> may be disposed vertically in the inner space of the weight casing 51b. The weight casing 51b may be attached to the motor <NUM>. A hole through which the motor shaft 52a is inserted may be formed in one side of the weight casing 51b.

The vibration module <NUM>, <NUM>, and <NUM> may comprise a motor <NUM> that generates torque for the first eccentric portion <NUM> and second eccentric portion <NUM>. The motor <NUM> is disposed on the vibrating body <NUM> and <NUM>. The motor <NUM> comprises a rotating motor shaft 52a. For example, the motor <NUM> comprises a rotor and a stator, and the motor shaft 52a may rotate integrally with the rotor. The motor shaft 52a transmits torque to a transmitting portion <NUM>. The motor shaft 52a is inserted and protrudes between the first eccentric portion <NUM> and the second eccentric portion <NUM>. The motor shaft 52a is connected to the transmitting portion <NUM>.

The vibration module <NUM>, <NUM>, and <NUM> may comprise a transmitting portion <NUM> that transmits the torque of the motor <NUM> to the first eccentric portion <NUM> and second eccentric portion <NUM>. The transmitting portion <NUM> is disposed on the vibrating body 351and <NUM>. The transmitting portion <NUM> may comprise a gear, belt, and/or pulley.

The transmitting portion <NUM> comprises a bevel gear 53a that rotates integrally with the motor shaft 52a. The bevel gear 53a has a plurality of gear teeth arranged along the perimeter of the motor shaft 52a. Assuming that there is an imaginary straight line along the axis of rotation of the motor shaft 52a, the bevel gear 53a has a plurality of gear teeth that slope towards the imaginary straight line in the direction the motor shaft 52a protrudes. The bevel gear 53a is placed between the first eccentric portion <NUM> and the second eccentric portion <NUM>.

The transmitting portion <NUM> may comprise a transmission shaft <NUM> that rotatably supports the bevel gear 53a. The transmission shaft <NUM> may be supported by the weight shaft <NUM>. One end of the transmission shaft <NUM> may be fixed to the weight shaft <NUM>, and the other end may be inserted into the center of the bevel gear 53a. The transmission shaft <NUM> may be fixed to the center of the weight shaft <NUM>. The transmission shaft <NUM> may be placed between the first eccentric portion <NUM> and the second eccentric portion <NUM>.

The vibration module <NUM>, <NUM>, and <NUM> comprises a first eccentric portion <NUM> that rotates around a predetermined first rotational axis Ow1 in such a way that the weight is off-center. The first eccentric portion <NUM> is configured to rotate around the first rotational axis Ow1 in such a way that the weight is off-center. The vibration module <NUM>, <NUM>, and <NUM> comprises a second eccentric portion <NUM> that rotates around a predetermined second rotational axis Ow2 in such a way that the weight is off-center. The second eccentric portion <NUM> is configured to rotate around the second rotational axis Ow2 in such a way that the weight is off-center. The first rotational axis Ow1 and the second rotational axis Ow2 may be the same or different.

The second rotational axis Ow2 is set to be the same as or parallel to the first rotational axis Ow1. While the first rotational axis Ow1 and the second rotational axis Ow2 in this exemplary embodiment are the same, the first rotational axis Ow1 and the second rotational axis Ow2 in other exemplary embodiments may be placed apart in parallel with each other. This makes it easy for the centrifugal force F1 of the first eccentric portion <NUM> and the centrifugal force F2 of the second eccentric portion <NUM> to reinforce or offset each other repeatedly.

In this exemplary embodiment, the first rotational axis Ow1 and the second rotational axis Ow2 are the same. Through this, the point of action at which the centrifugal force F1 of the first eccentric portion <NUM> and the centrifugal force F2 of the second eccentric portion <NUM> are applied can be positioned on a single rotational axis Ow1, the centrifugal force F1 and the centrifugal force F2 can efficiently reinforce and offset each other, and it is possible to prevent a local moment load created by the horizontal distance difference between the point of action of the centrifugal force F1 and the point of action of the centrifugal force F2.

The first rotational axis Ow1 and the second rotational axis Ow2 may be disposed in the same direction relative to the motor <NUM>.

The first eccentric portion <NUM> is supported by the vibrating body <NUM> and <NUM>. The first eccentric portion <NUM> may be rotatably supported by the weight shaft <NUM> disposed on the vibrating body <NUM> and <NUM>. The second eccentric portion <NUM> is supported by the vibrating body <NUM> and <NUM>. The first eccentric portion <NUM> may be rotatably supported by the weight shaft <NUM> disposed on the vibrating body <NUM> and <NUM>.

The first eccentric portion <NUM> comprises a first rotating portion 55b rotating around the first rotational axis Ow1 in contact with the transmitting portion <NUM>. The first rotating portion 55b receives torque from the transmitting portion <NUM>. The first rotating portion 55b may be formed entirely in the shape of a cylinder around the first rotational axis Ow1.

The first rotating portion 55b may comprise a center portion 55b1 that makes rotatable contact with the weight shaft <NUM>. The weight shaft <NUM> is placed to penetrate the center portion 55b1. The center portion 55b1 extends along the rotational axis Ow1 and Ow2. The center portion 55b1 has a center hole along the rotational axis Ow1 and Ow2. The center portion 55b1 may be formed in the shape of a pipe.

The first rotating portion 55b may comprise a peripheral portion 55b2 mounted to the center portion 55b1. The center portion 55b1 is placed to penetrate the peripheral portion 55b2. The peripheral portion 55b2 may be formed entirely in the shape of a cylinder that extends along the rotational axis Ow1 and Ow2. A mounting groove 55b3 where the first weight member 55a rests may be formed in the peripheral portion 55b2. The mounting groove 55b3 may be formed in such a way that its top is open. A centrifugal side of the mounting groove 55b3 around the rotational axis Ow1 and Ow2 may be blocked. The peripheral portion 55b2 and the first weight member 55a rotate as a single unit.

The first eccentric portion <NUM> comprises a toothed portion 55b4 that receives torque by meshing with the bevel gear 53a. The toothed portion 55b4 is formed on the underside of the peripheral portion 55b2. The toothed portion 55b4 is placed on the perimeter around the rotational axis Ow1 and Ow2. The toothed portion 55b4 slopes upward from the rotational axis Ow1 and Ow2.

The first eccentric portion <NUM> comprises a first weight member 55a fixed to the first rotating portion 55b. The first weight member 55a rotates integrally with the first rotating portion 55b. The first weight member 55a is made of a material with a higher specific gravity than the first rotating portion 55b.

The first weight member 55a is placed on one side around the first rotational axis Ow1, and causes the weight of the first eccentric portion <NUM> to be off-centered. The first weight member 55a may be formed entirely in the shape of a column whose base is semi-circular. The first weight member 55a may be disposed within an angular range of <NUM> degrees with respect to the first rotational axis Ow1, at a certain point in time during rotation of the first eccentric portion <NUM>. In this exemplary embodiment, the first weight member 55a is disposed within the range of <NUM> degrees with respect to the first rotational axis Ow1, at the certain point in time.

The second eccentric portion <NUM> comprises a second rotating portion 56b rotating around the second rotational axis Ow2 in contact with the transmitting portion <NUM>. The second rotating portion 56b receives torque from the transmitting portion <NUM>. The second rotating portion 56b may be formed entirely in the shape of a cylinder around the second rotational axis Ow2.

The second eccentric portion <NUM> comprises a center portion 56b1 that makes rotatable contact with the weight shaft <NUM>. The weight shaft <NUM> is placed to penetrate the center portion 56b1. The center portion 56b1 extends along the rotational axis Ow1 and Ow2. The center portion 56b1 has a center hole along the rotational axis Ow1 and Ow2. The center portion 56b1 may be formed in the shape of a pipe.

The second rotating portion 56b may comprise a peripheral portion 56b2 mounted to the center portion 56b1. The center portion 56b1 is placed to penetrate the peripheral portion 56b2. The peripheral portion 56b2 may be formed entirely in the shape of a cylinder that extends along the rotational axis Ow1 and Ow2. A mounting groove 56b3 where the second weight member 56a rests may be formed in the peripheral portion 56b2. The mounting groove 56b3 may be formed in such a way that its bottom is open. A centrifugal side of the mounting groove 56b around the rotational axis Ow1 and Ow2 may be blocked. The peripheral portion 56b2 and the second weight member 56a rotate as a single unit.

The second eccentric portion <NUM> comprises a toothed portion 56b4 that receives torque by meshing with the bevel gear 53a. The toothed portion 56b4 is formed on the topside of the peripheral portion 56b2. The toothed portion 56b4 is placed on the perimeter around the rotational axis Ow1 and Ow2. The toothed portion 56b4 slopes downward from the rotational axis Ow1 and Ow2.

The second eccentric portion <NUM> comprises a second weight member 56a fixed to the second rotating portion 56b. The second weight member 56a rotates integrally with the second rotating portion 56b. The second weight member 56a is made of a material with a higher specific gravity than the second rotating portion 56b.

The second weight member 56a is placed on one side with respect to the second rotational axis Ow2, and causes the weight of the second eccentric portion <NUM> to be off-centered. The second weight member 56a may be formed entirely in the shape of a column whose base is semi-circular. The second weight member 56a may be disposed within an angular range of <NUM> degrees with respect to the second rotational axis Ow2, at a certain point in time during rotation of the second eccentric portion <NUM>. In this exemplary embodiment, the second weight member 56a is disposed within the range of <NUM> degrees with respect to the second rotational axis Ow2, at the certain point in time.

The first eccentric portion <NUM> and the second eccentric portion <NUM> may be arranged along the center axis Oc, spaced apart from each other. The first eccentric portion <NUM> and the second eccentric portion <NUM> may be placed to face each other. The first eccentric portion <NUM> may be placed above the second eccentric portion <NUM>.

The first rotating portion 55b and the second rotating portion 56b may be the same weight. The first weight member 55a and the second weight member 56a may be the same weight.

Referring to <FIG>, when the motor shaft 52a and the bevel gear 53a rotate in one direction, the first eccentric portion <NUM> rotates counterclockwise and the second eccentric portion <NUM> rotates clockwise. The first eccentric portion <NUM> and the second eccentric portion <NUM> rotate in opposite directions.

The vibration module <NUM>, <NUM>, and <NUM> may comprise a weight shaft <NUM> that provides function to the first rotational axis Ow1 and second rotational axis Ow2. One weight shaft <NUM> may provide function to both the first rotational axis Ow1 and second rotational axis Ow2. The weight shaft <NUM> may be fixed to the vibrating body <NUM> and <NUM>. The upper and lower ends of the weight shaft <NUM> may be fixed to the weight casing 51b. The weight shaft <NUM> is disposed on the first rotational axis Ow1 and the second rotational axis Ow2. The weight shaft <NUM> may be placed to penetrate the first eccentric portion <NUM> and the second eccentric portion <NUM>.

The vibration module <NUM>, <NUM>, and <NUM> comprises a hanger driving unit <NUM> and <NUM> that connects the vibrating body <NUM> and <NUM> and the hanger body <NUM> and <NUM>. The hanger driving unit <NUM> and <NUM> is configured to connect the vibrating body <NUM> and <NUM> and the hanger body <NUM> and <NUM> outside the vibration module <NUM>, <NUM> and <NUM>. The hanger driving unit <NUM> and <NUM> transmits the vibration of the vibrating body <NUM> and <NUM> to the hanger body <NUM> and <NUM>. The hanger driving unit <NUM> and <NUM> may transmit the vibration of the vibrating body <NUM> and <NUM> to the hanger body <NUM> and <NUM>, along the connection axis Oh.

The vibration module <NUM>, <NUM>, and <NUM> comprises an elastic member locking portion <NUM> and <NUM> on which one end of the elastic member <NUM> and <NUM> is locked. The elastic member locking portion <NUM> and <NUM> may be disposed on the vibrating body <NUM> and <NUM>. The elastic member locking portion <NUM> and <NUM> may apply pressure to the elastic member <NUM> and <NUM> or receive elastic force from the elastic member <NUM> and <NUM>, when the vibration module <NUM>, <NUM>, and <NUM> moves.

Hereinafter, the operating mechanism of the vibration module <NUM>, <NUM>, and <NUM> will be described below with reference to <FIG>.

The vibration direction (+X, -X) refers to a preset direction in which the hanger body <NUM> and <NUM> reciprocates. In this exemplary embodiment, the left-right direction is preset as the vibration direction (+X, -X).

The "center axis Oc, first rotational axis Ow1, second rotational axis Ow2, and connection axis Oh mentioned throughout the present disclosure are imaginary axes used to describe the present disclosure, and do not designate actual components of the apparatus.

The first rotational axis Ow1 refers to an imaginary straight line through the center of rotation of the first eccentric portion <NUM>. The first rotational axis Ow1 maintains a fixed position relative to the vibrating body <NUM> and <NUM>. That is, even when the vibrating body <NUM> and <NUM> moves, the first rotational axis Ow1 moves integrally with the vibrating body <NUM> and <NUM> and maintains the position relative to the vibrating body <NUM> and <NUM>. The first rotational axis Ow1 may extend vertically.

To provide the function of the first rotational axis Ow1, the weight shaft <NUM> disposed on the first rotational axis Ow1 may be provided as in this exemplary embodiment. To provide the function of the first rotational axis Ow1, in another exemplary embodiment, a projection protruding along the first rotational axis Ow1 may be formed on either the first eccentric portion <NUM> or the vibrating body <NUM> and <NUM>, and a groove with which the projection rotatably engages may be formed in the other.

The second rotational axis Ow2 refers to an imaginary straight line through the center of rotation of the second eccentric portion <NUM>. The second rotational axis Ow2 maintains a fixed position relative to the vibrating body <NUM> and <NUM>. That is, even when the vibrating body <NUM> and <NUM> moves, the second rotational axis Ow2 moves integrally with the vibrating body <NUM> and <NUM> and maintains the position relative to the vibrating body <NUM> and <NUM>. The second rotational axis Ow2 may extend vertically.

To provide the function of the second rotational axis Ow2, the weight shaft <NUM> disposed on the second rotational axis Ow2 may be provided as in this exemplary embodiment. To provide the function of the second rotational axis Ow2, in another exemplary embodiment, a projection protruding along the second rotational axis Ow2 may be formed on either the second eccentric portion <NUM> or the vibrating body <NUM> and <NUM>, and a groove with which the projection rotatably engages may be formed in the other.

The first rotational axis Ow1 and the second rotational axis Ow2 may be disposed perpendicular to the vibration direction (+X, -X). In this exemplary embodiment, the first rotational axis Ow1 and the second rotational axis Ow2 may extend vertically.

The connection axis Oh refers to an imaginary straight line through the point at which excitation force Fo is applied to the hanger body <NUM> and <NUM> by the vibration generated by the vibration module <NUM>, <NUM>, and <NUM>. The connection axis Oh may be defined as a straight line that passes through the point of action of excitation force Fo and extends vertically. The connection axis Oh maintains a fixed position relative to the vibrating body <NUM> and <NUM>. That is, even when the vibrating body <NUM> and <NUM> moves, the connection axis Oh moves integrally with the vibrating body <NUM> and <NUM> and maintains the position relative to the vibrating body <NUM> and <NUM>.

<FIG> illustrate the center m1 of mass of the first eccentric portion <NUM>, the center m2 of mass of the second eccentric portion <NUM>, the radius r1 of rotation of the center m1 of mass with respect to the first rotational axis Ow1, the radius r2 of rotation of the center m2 of mass with respect to the second rotational axis Ow2, the angular speed w of the first eccentric portion <NUM> around the first rotational axis Ow1, the angular speed w of the second eccentric portion <NUM> around the second rotational axis Ow2, the distance A1 between the center axis Oc and the first rotational axis Ow1, the distance A2 between the center axis Oc and the second rotational axis Ow2, and the distance B between the center axis Oc and the connection axis Oh.

Also, <FIG> illustrate the direction of the centrifugal force F1 of the first eccentric portion <NUM> with respect to the first rotational axis Ow1 and the direction of the centrifugal force F2 of the second eccentric portion <NUM> with respect to the second rotational axis Ow2. The sum of the centrifugal force F1 and centrifugal force F2 is applied to the vibrating body <NUM> and <NUM>. The excitation force Fo refers to a force applied to the hanger body <NUM> and <NUM> by the centrifugal forces F1 and F2.

The magnitude of the centrifugal force F1 is m1·r1·w<NUM>, and the magnitude of the centrifugal force F2 is m2·r2·w<NUM>. The centrifugal force F1 and the centrifugal force F2 are exerted on the vibrating body <NUM> and <NUM>, and the points of action of the centrifugal force F1 and centrifugal force F2 are positioned on the first rotational axis Ow1 and second rotational axis O2, respectively.

Referring to <FIG>, <FIG>, <FIG>, and <FIG>, the centrifugal force F1 and the centrifugal force F2 are set to reinforce each other in the vibration direction (+X, -X). When the weight of the first eccentric portion <NUM> is off-centered to one side D1 in the vibration direction (+X, -X) from the first rotational axis Ow1, the weight of the second eccentric portion <NUM> is off-centered to the one side D1 with respect to the second rotational axis Ow2. When the first eccentric portion <NUM> generates a centrifugal force F1 toward one side D1 in the vibration direction (+X, -X) with respect to the first rotational axis Ow1, the second eccentric portion <NUM> generates a centrifugal force F2 toward the one side D1 with respect to the second rotational axis Ow2.

Referring to <FIG>, <FIG>, <FIG>, and <FIG>, the centrifugal force F1 and the centrifugal force F2 are set to offset each other in a direction (+Y, -Y) intersecting the vibration direction (+X, -X). When the weight of the first eccentric portion <NUM> is off-centered to one side D2 in the direction (+Y, -Y) intersecting the vibration direction (+X, -X) with respect to the first rotational axis Ow1, the weight of the second eccentric portion <NUM> is off-centered to the opposite side of the one side D2 from the second rotational axis Ow2. When the first eccentric portion <NUM> generates a centrifugal force F1 toward one side D2 in the direction (+Y, -Y) intersecting the vibration direction (+X, -X) with respect to the first rotational axis Ow1, the second eccentric portion <NUM> generates a centrifugal force F2 toward the opposite side of the one side D2 with respect to the second rotational axis Ow2. Here, the intersecting direction (+Y, -Y) is a direction perpendicular to the vibration direction (+X, -X) and the rotational axis Ow1 and Ow2.

The centrifugal force F1 and the centrifugal force F2 are set to offset each other when they generate no excitation force Fo in a predetermined vibration direction (+X, -X). In this case, the centrifugal force F1 and the centrifugal force F2 act in opposite directions, and therefore the sum of the centrifugal forces F1 and F2 is equal to the difference between the magnitude of the centrifugal force F1 and the magnitude of the centrifugal force F2. Thus, at least one of the centrifugal forces F1 and F2 is offset by the other.

Preferably, the centrifugal force F1 and the centrifugal force F2 are set to "completely offset" each other when they generate no excitation force Fo in a predetermined vibration direction (+X, -X). The centrifugal force of the first eccentric portion and the centrifugal force of the second eccentric portion are set to completely offset each other in the direction (+Y, -Y) intersecting the vibration direction (+X, -X). Here, the expression "completely offset" means that the sum of the centrifugal force F1 and centrifugal force F2 is zero. This can minimize unnecessary vibrations generated in a direction (+Y, -Y) perpendicular to a predetermined vibration direction (+X, -X).

In order for the centrifugal force F1 and the centrifugal force F2 to completely offset each other when they generate no excitation force Fo in the vibration direction (+X, -X), the scalar quantity m1 r1 and the scalar quantity m2·r2 may be set equal.

i) The radius r1 of rotation of the center m1 of mass of the first eccentric portion <NUM> with respect to the first rotational axis Ow1; and ii) the radius r2 of rotation of the center m2 of mass of the second eccentric portion <NUM> with respect to the second rotational axis Ow2 may be set equal (r1=r2). The mass m1 of the first eccentric portion <NUM> and the mass m2 of the second eccentric portion <NUM> may be set equal (m1=m2). By these two settings (r1=r2, m1=m2), the centrifugal force F1 and centrifugal force F2 in the intersecting direction (+Y, -Y) may completely offset each other. Even if the radius r1 of rotation and the radius r2 of rotation are different and the mass m1 and the mass m2 are different, the settings r1=r2 and m1=m2 allow the centrifugal force F1 and centrifugal force F2 in the intersecting direction (+Y, -Y) to completely offset each other.

i) the distance A1 between the first rotational axis Ow1; and ii) the center axis Oc and the distance A2 between the second rotational axis Ow2 and the center axis Oc may be set equal. Through this, the centrifugal force F1 and centrifugal force F2 contribute to the generation of excitation force Fo in equal proportions, thereby preventing fatigue load from concentrating on either the region supporting the first eccentric portion <NUM> or the region supporting the second eccentric portion <NUM>.

The first eccentric portion <NUM> and the second eccentric portion <NUM> may be configured to rotate at the same angular speed, i) The angular speed w of the first eccentric portion <NUM> around the first rotational axis Ow1; and ii) the angular speed w of the second eccentric portion <NUM> around the second rotational axis Ow2 may be set equal. This allows for periodic reinforcement and offsetting of the centrifugal forces F1 and F2 caused by the rotation of the first eccentric portion <NUM> and second eccentric portion <NUM>.

Here, the angular speed refers to a scalar which only has magnitude but no direction of rotation, which is different from angular velocity which is a vector having both direction of rotation and magnitude. That is, if the angular speed w of the first eccentric portion <NUM> and the angular speed w of the second eccentric portion <NUM> are equal, this does not mean that they rotate in the same direction. In this exemplary embodiment, even if the angular speed w of the first eccentric portion <NUM> and the angular speed w of the second eccentric portion <NUM> are equal, the first eccentric portion <NUM> and the second eccentric portion <NUM> rotate in opposite directions.

Hereinafter, the operating mechanism of the vibration module <NUM> according to the first exemplary embodiment will be described below in more concrete details with reference to <FIG>. The vibrating body <NUM> is configured to rotate around a predetermined center axis Oc where the position relative to the frame <NUM> is fixed.

In the first exemplary embodiment, the center axis Oc refers to an imaginary straight line through the center of rotation of the vibration module <NUM>. The center axis Oc is an imaginary straight line that maintains a fixed position relative to the frame <NUM>. The center axis Oc may extend vertically.

To provide the function of the center axis Oc, a center axial portion <NUM> protruding along the center axis Oc may be formed on the supporting member <NUM>, and a central groove or hole with which the center axial portion <NUM> rotatably engages may be formed in the vibrating body <NUM>, as in the first exemplary embodiment. To provide the function of the center axis Oc, in another exemplary embodiment, a projection protruding along the center axis Oc may be formed on the vibrating body <NUM>, and a groove with which the projection rotatably engages may be formed in the supporting member <NUM>.

In the first exemplary embodiment, the first rotational axis Ow1 and the second rotational axis Ow1 and Ow2 may be spaced apart from the center axis Oc in the same direction. Even if the first rotational axis Ow1 and the second rotational axis Ow2 are not the same, the reinforcement and offsetting of the centrifugal force F1 and the centrifugal force F2 may be repeated periodically, as long as the first rotational axis Ow1 and the second rotational axis Ow1 and Ow2 are placed apart from the center axis Oc in the same direction and the first eccentric portion <NUM> and the second eccentric portion <NUM> rotate at the same angular speed in opposite directions around the first rotational axis Ow1 and second rotational axis Ow2, respectively.

In the first exemplary embodiment, the center axis Oc, the first rotational axis Ow1, and the second rotational axis Ow2 are disposed to cross one imaginary straight line at a right angle.

In the first exemplary embodiment, the circumferential direction DI refers to the direction of a perimeter around the center axis Oc, and encompasses the clockwise direction DI1 and the counterclockwise direction DI2. In the first exemplary embodiment, the clockwise direction DI1 and the counterclockwise direction DI2 are defined as viewed from one of the directions (+Z, -Z) in which the center axis Oc extends.

When the centrifugal force F1 with respect to the first rotational axis Ow1 caused by the rotation of the first eccentric portion is directed in the circumferential direction DI, the centrifugal force F1 causes a rotation of the vibrating body <NUM> on the center axis Oc. Likewise, when the centrifugal force F2 with respect to the second rotational axis Ow2 caused by the rotation of the second eccentric portion <NUM> is directed in the circumferential direction DI, the centrifugal force F2 causes a rotation of the vibrating body <NUM> on the center axis Oc.

In the first exemplary embodiment, the diametrical direction Dr refers to a direction across the center axis Oc, and encompasses the centrifugal direction Dr1 and the mesial direction Dr2. The centrifugal direction Dr1 refers to a direction away from the center axis Oc, and the mesial direction Dr2 refers to a direction toward the center axis Oc.

When the centrifugal force F1 with respect to the first rotational axis Ow1 caused by the rotation of the first eccentric portion <NUM> is directed in the diametrical direction Dr, the centrifugal force F1 causes no rotation of the vibrating body <NUM> on the center axis Oc. Likewise, when the centrifugal force F2 with respect to the second rotational axis Ow2 caused by the rotation of the second eccentric portion <NUM> is directed in the diametrical direction Dr, the centrifugal force F2 causes no rotation of the vibrating body <NUM> on the center axis Oc.

In the first exemplary embodiment (see <FIG>), the connection axis Oh and the center axis Oc are placed apart in parallel with each other. A protruding portion 358a is formed along the connection axis Oh at a connection point between the vibration module <NUM> and the hanger body <NUM> so that the rotating and reciprocating motion (arc motion) of the vibration module <NUM> is converted into the linear reciprocating motion of the hanger body <NUM>.

In the first exemplary embodiment, since the vibration module <NUM> rotates around the center axis Oc, the excitation fore Fo can be calculated by converting the sum of the centrifugal force F1 and centrifugal force F2 into an external force with a point of action on the connection axis Oh, taking the moment arm lengths A1, A2, and B into account.

Referring to <FIG> and <FIG>, the centrifugal force F1 and the centrifugal force F2 are set to reinforce each other when they generate a torque around the center axis Oc of the vibrating body <NUM>. When the weight of the first eccentric portion <NUM> is off-centered in one direction D3, either clockwise direction DI1 or counterclockwise direction DI2 with respect to the center axis Oc, from the first rotational axis Ow1, the weight of the second eccentric portion <NUM> is off-centered in the one direction D3 from the second rotational axis Ow2. When the first eccentric portion <NUM> generates a centrifugal force in one direction D3, either clockwise direction DI1 or counterclockwise direction DI2 with respect to the center axis Oc, from the first rotational axis Ow1, the second eccentric portion <NUM> generates a centrifugal force in the one direction D3 from the second rotational axis Ow2. In this case, the moment A1·F1+A2·F2 caused by the centrifugal force F1 and centrifugal force F2 is equal to the moment B Fo caused by the excitation force Fo. Thus, Fo becomes A1/B F1+A2/B F2.

Referring to <FIG> and <FIG>, the centrifugal force F1 and the centrifugal force F2 are set to be directed in opposite directions when they generate no torque around the center axis Oc of the vibrating body <NUM>. When the weight of the first eccentric portion <NUM> is off-centered in one direction D4, either centrifugal direction Dr1 or mesial direction Dr2 with respect to the center axis Oc, from the first rotational axis Ow1, the weight of the second eccentric portion <NUM> is off-centered in the opposite direction of the one direction D4 from the second rotational axis Ow2. When the first eccentric portion <NUM> generates a centrifugal force in one direction D4, centrifugal direction Dr1 or mesial direction Dr2 with respect to the center axis Oc, from the first rotational axis Ow1, the second eccentric portion <NUM> generates a centrifugal force in the opposite direction of the one direction D4 from the second rotational axis Ow2.

Referring to <FIG> and <FIG>, when the centrifugal force F1 of the first eccentric portion <NUM> and the centrifugal force F2 of the second eccentric portion <NUM> offset each other, either the direction of action of the centrifugal force F1 or the direction of action of action of the centrifugal force F2 is the centrifugal direction Dr1, and the other is the mesial direction Dr2.

In the first exemplary embodiment, the centrifugal force F1 and the centrifugal force F2 are set to offset each other when they generate no torque for the vibrating body <NUM>. In this case, the centrifugal force F1 and the centrifugal force F2 act in opposite directions, and therefore the sum of the centrifugal forces F1 and F2 is equal to the difference between the magnitude of the centrifugal force F1 and the magnitude of the centrifugal force F2. Thus, at least one of the centrifugal forces F1 and F2 is offset by the other. Preferably, the centrifugal force F1 and the centrifugal force F2 are set to "completely offset" each other when they generate no torque for the vibrating body <NUM>.

<FIG> show the momentum of <NUM>-degree rotation of the first eccentric portion <NUM> and second eccentric portion <NUM> rotating at the same angular speed w.

Referring to <FIG>, when the first eccentric portion <NUM> generates a centrifugal force F1 with respect to the first rotational axis Ow1 in the clockwise direction DI1, the second eccentric portion <NUM> generates a centrifugal force F2 with respect to the second rotational axis Ow2 in the clockwise direction DI1. When the first eccentric portion <NUM> generates a centrifugal force F1 with respect to the first rotational axis Ow1 in the +X axis direction, the second eccentric portion <NUM> generates a centrifugal force F2 with respect to the second rotational axis Ow2 in the +X axis direction. Therefore, the centrifugal force F1 and the centrifugal force F2 reinforce each other, thereby generating a torque for the vibrating body <NUM> in the clockwise direction DI1. The excitation force Fo transmitted to the hanger body <NUM> along the connection axis Oh acts in the -X axis direction.

Referring to <FIG>, when the first eccentric portion <NUM> generates a centrifugal force F1 with respect to the first rotational axis Ow1 in the centrifugal direction Dr1, the second eccentric portion <NUM> generates a centrifugal force F2 with respect to the second rotational axis Ow2 in the mesial direction Dr2. When the first eccentric portion <NUM> generates a centrifugal force F1 with respect to the first rotational axis Ow1 in the -Y axis direction, the second eccentric portion <NUM> generates a centrifugal force F2 with respect to the second rotational axis Ow2 in the +Y axis direction. Therefore, the centrifugal force F1 and the centrifugal force F2 generate no torque for the vibrating body <NUM>. The excitation force Fo transmitted to the hanger body <NUM> along the connection axis Oh is zero. Also, the centrifugal force F1 and the centrifugal force F2 are offset as they act in opposite directions.

Referring to <FIG>, when the first eccentric portion <NUM> generates a centrifugal force F1 with respect to the first rotational axis Ow1 in the counterclockwise direction DI2, the second eccentric portion <NUM> generates a centrifugal force F2 with respect to the second rotational axis Ow2 in the counterclockwise direction DI2. When the first eccentric portion <NUM> generates a centrifugal force F1 with respect to the first rotational axis Ow1 in the -X axis direction, the second eccentric portion <NUM> generates a centrifugal force F2 with respect to the second rotational axis Ow2 in the -X axis direction. Therefore, the centrifugal force F1 and the centrifugal force F2 reinforce each other, thereby generating a torque for the vibrating body <NUM> in the counterclockwise direction DI2. The excitation force Fo transmitted to the hanger body <NUM> along the connection axis Oh acts in the +X axis direction.

Referring to <FIG>, when the first eccentric portion <NUM> generates a centrifugal force F1 with respect to the first rotational axis Ow1 in the mesial direction Dr2, the second eccentric portion <NUM> generates a centrifugal force F2 with respect to the second rotational axis Ow2 in the centrifugal direction Dr1. When the first eccentric portion <NUM> generates a centrifugal force F1 with respect to the first rotational axis Ow1 in the +Y axis direction, the second eccentric portion <NUM> generates a centrifugal force F2 with respect to the second rotational axis Ow2 in the -Y axis direction. Therefore, the centrifugal force F1 and the centrifugal force F2 generate no torque for the vibrating body <NUM>. The excitation force Fo transmitted to the hanger body <NUM> along the connection axis Oh is zero. Also, the centrifugal force F1 and the centrifugal force F2 are offset as they act in opposite directions.

Hereinafter, the operating mechanism of the vibration module <NUM> according to the second exemplary embodiment will be described below in more concrete details with reference to <FIG>. The vibrating body <NUM> is configured to be fixed to the hanger body <NUM> and move integrally with the hanger body <NUM>.

In the second exemplary embodiment (see <FIG>), when viewed from the direction in which the rotational axis Ow1 and Ow2 extends, the connection axis Oh may be disposed between the center Mm of mass of the motor <NUM> and the rotational axis Ow1 and Ow2. When viewed from the direction (top) in which the first rotational axis Ow1 extends, the hanger driving unit <NUM> is fixed to the hanger body <NUM>, in a position between the center Mm of mass of the motor <NUM> and the first rotational axis Ow1. This can reduce torsion caused by the center Mm of mass of the motor <NUM> when an excitation force is transmitted to the hanger body <NUM> from the vibration module <NUM>, thereby creating more stable vibrating motion.

In the second exemplary embodiment, since the vibration module <NUM> vibrates integrally with the hanger body <NUM>, the excitation fore Fo can be calculated as the sum of the centrifugal force F1 and centrifugal force F2 in the vibration direction (+X, - X).

Referring to <FIG> and <FIG>, the centrifugal force F1 and the centrifugal force F2 are set to reinforce each other when exerted on the vibrating body <NUM> in the vibration direction (+X, -X). In this case, the excitation force Fo in the vibration direction (+X, -X) caused by the centrifugal force F1 and centrifugal force F2 is F1+F2.

Referring to <FIG> and <FIG>, the centrifugal force F1 and the centrifugal force F2 are set to be directed in opposite directions when exerted on the vibrating body <NUM> in the intersecting direction (+Y, -Y). In this case, the excitation force Fo in the vibration direction (+X, -X) caused by the centrifugal force F1 and centrifugal force F2 is zero. Also, the excitation force in the intersecting direction (+Y, -Y) caused by the centrifugal force F1 and centrifugal force F2 is |F1-F2|. Preferably, the excitation force in the intersecting direction (+Y, -Y) caused by the centrifugal force F1 and centrifugal force F2 is preset to zero.

<FIG> show the angular momentum of <NUM>-degree rotation of the first eccentric portion <NUM> and second eccentric portion <NUM> rotating at the same angular speed w.

Referring to <FIG>, when the first eccentric portion <NUM> generates a centrifugal force F1 with respect to the first rotational axis Ow1 in the +X axis direction, the second eccentric portion <NUM> generates a centrifugal force F2 with respect to the second rotational axis Ow2 in the +X axis direction. Therefore, the centrifugal force F1 and the centrifugal force F2 reinforce each other and act on the vibrating body <NUM> in the +X axis direction. The excitation force Fo transmitted to the hanger body <NUM> acts in the +X axis direction.

Referring to <FIG>, when the first eccentric portion <NUM> generates a centrifugal force F1 with respect to the first rotational axis Ow1 in the -Y axis direction, the second eccentric portion <NUM> generates a centrifugal force F2 with respect to the second rotational axis Ow2 in the +Y axis direction. Therefore, the centrifugal force F1 and the centrifugal force F2 do not act on the vibrating body <NUM> in the vibration direction (+X, -X). Also, the centrifugal force F1 and the centrifugal force F2 in opposite directions offset each other. The excitation force Fo in the vibration direction (+X, -X) transmitted to the hanger body <NUM> is zero.

Referring to <FIG>, when the first eccentric portion <NUM> generates a centrifugal force F1 with respect to the first rotational axis Ow1 in the -X axis direction, the second eccentric portion <NUM> generates a centrifugal force F2 with respect to the second rotational axis Ow2 in the -X axis direction. Therefore, the centrifugal force F1 and the centrifugal force F2 reinforce each other and act on the vibrating body <NUM> in the -X axis direction. The excitation force Fo transmitted to the hanger body <NUM> acts in the -X axis direction.

Referring to <FIG>, when the first eccentric portion <NUM> generates a centrifugal force F1 with respect to the first rotational axis Ow1 in the +Y axis direction, the second eccentric portion <NUM> generates a centrifugal force F2 with respect to the second rotational axis Ow2 in the -Y axis direction. Therefore, the centrifugal force F1 and the centrifugal force F2 do not act on the vibrating body <NUM> in the vibration direction (+X, -X). Also, the centrifugal force F1 and the centrifugal force F2 in opposite directions offset each other. The excitation force Fo in the vibration direction (+X, -X) transmitted to the hanger body <NUM> is zero.

Referring to <FIG> and <FIG>, a description of the elements common to the first and second exemplary embodiments is the same as what has been described above. Hereinafter, a description will given, focusing on the elements different for the first and second exemplary embodiments.

Hereinafter, the configuration of the vibration module <NUM>, elastic member <NUM>, and supporting member <NUM> according to the first exemplary embodiment will be described with reference to <FIG>. The vibrating body <NUM> according to the first exemplary embodiment is configured to be rotatable around the center axis Oc.

In the first exemplary embodiment, the weight casing 51b is placed apart from the center axis Oc in the centrifugal direction Dr1. The weight casing 51b and the hanger driving unit <NUM> may be placed apart from each other, in opposite directions with respect to the center axis Oc. The connection axis Oh and the rotational axis Ow1 and Ow2 may be placed apart from each other, in opposite directions with respect to the center axis Oc. The motor <NUM> may be disposed between the center axis Oc and the rotational axis Ow1 and Ow2. The motor shaft 52a may protrude in the centrifugal direction Dr1. The motor shaft 52a may protrude in the -Y axis direction.

The vibrating body <NUM> may comprise a base casing 351d rotatably supported by the center axial portion <NUM>. The center axial portion <NUM> is placed to penetrate the base casing 351d. A bearing B is interposed between the center axial portion <NUM> and the base casing 351d. The base casing 351d is disposed between the weight casing 51b and an elastic member mount 351c.

The vibrating body <NUM> may comprise a motor supporting portion 351e supporting the motor <NUM>. The motor supporting portion 351e may support the bottom end of the motor. The motor supporting portion 351e may be disposed between the weight casing 51b and the base casing 351d.

The vibrating body <NUM> may comprise an elastic member mount 351c on which one end of the elastic member <NUM> is locked. When the vibration module <NUM> rotates and vibrates, the elastic member mount 351c applies pressure on the elastic member <NUM> or receive restoring force from the elastic member <NUM>.

The elastic member mount 351c may be disposed on one end of the vibrating body <NUM> in the centrifugal direction Dr1. The elastic member mount 351c may connect and extend between the center axis Oc and the connection axis Oh. The elastic member mount 351c may extend in the centrifugal direction Dr1 and therefore have a distal end. The elastic member mount 351c is disposed on the other side of the first and second rotational axes Ow1 and Ow2 with respect to the center axis Oc. The elastic member mount 351c may be fixed to the base casing 351d. The elastic member mount 351c, base casing 351d, and motor supporting portion 351e may be formed as a single unit.

In the first exemplary embodiment, the motor <NUM> may be placed apart from the center axis Oc. The motor <NUM> may be disposed between the center axis Oc and the first and second rotational axes Ow1 and Ow2. The motor <NUM> has a motor shaft 52a placed perpendicular to the center axis Oc. The motor shaft 52a may protrude from the motor in the centrifugal direction Dr1.

The hanger driving unit <NUM> is connected to the hanger body <NUM>, spaced apart from the center axis Oc. The hanger driving unit <NUM> may be configured to be connected to the hanger body <NUM> on the outside, spaced apart from the center axis Oc.

The hanger driving unit <NUM> may comprise a protruding portion 358a that protrudes along the connection axis Oh. The protruding portion 358a protrudes downward from the hanger driving unit <NUM>. The protruding portion 358a protrudes along the connection axis Oh. The hanger driving unit <NUM> may comprise a connecting rod 358a and 358b comprising the protruding portion 358a. The connecting rod 358a and 358b may be configured as a separate member. One end 358a of the connecting rod 358a and 358b may be inserted into a slit 331bh of the hanger driven unit 331b. The connecting rod 358a and 358b converts the rotating motion of the vibration module <NUM> to reciprocate the hanger body <NUM>.

The connecting rod 358a and 358b is fixed to the vibrating body <NUM>. The upper end of the connecting rod 358a and 358b may be fixed to the vibrating body <NUM>. The connecting rod 358a and 358b rotates integrally with the vibrating body <NUM>. The connecting rod 358a and 358b may be disposed on the connection axis Oh. The connecting rod 358a and 358b may transmit the torque of the vibrating body <NUM> to the hanger body <NUM>.

The connecting rod 358a and 358b may comprise a vertical extension 358b which extends in an up-down direction. The vertical extension 358b may extend along the connection axis Oh. The upper end of the vertical extension 358b may be fixed to the elastic member mount 351c. The connecting rod 358a and 358b comprises the protruding portion 358a formed at the distal end of the vertical extension 358b. The protruding portion 358a is disposed on the lower end of the vertical extension 358b.

The vibration module <NUM> comprises an elastic member locking portion <NUM> on which one end of the elastic member <NUM> is locked. When the vibration module <NUM> rotates around the center axis Oc, the elastic member <NUM> is elastically deformed by the elastic member locking portion <NUM>, or the restoring force of the elastic member <NUM> is transmitted to the elastic member locking portion <NUM>. The elastic member locking portion <NUM> is disposed on the elastic member mount 351c.

The elastic member locking portion <NUM> may comprise a first locking portion 359a on which one end of the first elastic member 360a is locked. The first locking portion 359a may be formed on one side (+X) of the elastic member mount 351c. The elastic member locking portion <NUM> may comprise a second locking portion 359b on which one end of the second elastic member 360b is locked. The second locking portion 359b may be formed on the other side (-X) of the elastic member mount 351c.

The elastic member <NUM> may be disposed between the vibration module <NUM> and the supporting member <NUM>. One end of the elastic member <NUM> is locked on the vibration module <NUM>, and the other end is locked on an elastic member mounting portion <NUM> of the supporting member <NUM>. The elastic member <NUM> may comprise a tension spring and/or a compression spring. A pair of elastic members 360a and 360b may be disposed on both sides of the connection axis Oh in the vibration direction (+X, -X). The elastic member <NUM> may be placed apart from the center axis Oc.

A plurality of elastic members 360a and 360b may be provided. The elastic members 360a and 360b each may be configured to elastically deform when the vibration module <NUM> moves in either the clockwise direction DI1 or the counterclockwise direction DI2 and regain their elasticity when it moves in the other direction. The elastic members 360a and 360b may be configured to elastically deform when the hanger body <NUM> moves to one side in the vibration direction (+X, - X) and regain their elasticity when it moves to the other side.

The first elastic member 360a is disposed on one side (+X) of the vibrating body <NUM>. One end of the first elastic member 360a may be locked on the first locking portion 359a, and the other end may be locked on a first mounting portion 377a of the supporting member <NUM>. The first elastic member 360a may comprise a spring that elastically deforms in the vibration direction (+X, -X) and regains its elasticity.

The second elastic member 360b is disposed on the other side (-X) of the vibrating body <NUM>. The elastic member mount 351c is disposed between the first elastic member 360a and the second elastic member 360b. One end of the second elastic member 360b may be locked on the second locking portion 359b, and the other end may be locked on a second mounting portion 377b of the supporting member <NUM>. The second elastic member 360b may comprise a spring that elastically deforms in the vibration direction (+X, -X) and regains its elasticity.

The supporting member <NUM> may comprise a center axial portion <NUM> protruding along the center axis Oc. The center axial portion <NUM> may protrude upward from a center axis supporting portion <NUM>. The center axial portion <NUM> is inserted into a hole formed in the vibrating body <NUM>. The center axial portion <NUM> rotatably supports the vibrating body <NUM> through a bearing B.

The supporting member <NUM> may comprise a center axial supporting portion <NUM> to which the center axial portion <NUM> is fixed. The center axial supporting portion <NUM> may be located a distance below the vibrating body <NUM>. The center axial supporting portion <NUM> is fixed to the frame <NUM>.

The supporting member <NUM> comprises an elastic member mounting portion <NUM> where one end of the elastic member <NUM> is fixed. The elastic member mounting portion <NUM> is fixed to the frame <NUM>. The elastic member mounting portion <NUM> may be fixed to the interior frame 11a. The first mounting portion 377a and the second mounting portion 377b are placed apart from each other, in opposite directions with respect to the connection axis Oh.

Hereinafter, the configuration of the vibration module <NUM>, elastic member <NUM>, and supporting member <NUM> according to the second exemplary embodiment will be described with reference to <FIG>. The vibrating body <NUM> according to the second exemplary embodiment is configured to be fixed to the hanger body <NUM> and move integrally with the hanger body <NUM>.

The vibrating body <NUM> comprises a weight casing 51b. The vibrating body <NUM> supports the motor <NUM>. The weight casing 51b may be disposed in front of the motor <NUM>. The motor shaft 52a may protrude forward. The connection axis Oh is disposed between the rotational axis Ow1 and Ow2 and the center Mm of mass of the motor <NUM>.

The hanger driving unit <NUM> connects and holds the vibrating body <NUM> and the hanger body <NUM> together. The hanger driving unit <NUM> is fixed to the vibrating body <NUM>. The hanger driving unit <NUM> may protrude and extend downward from the vibrating body <NUM>, so that the lower end is fixed to the hanger body <NUM>. The lower end of the hanger driving unit <NUM> is fixed to the hanger driven unit 431b. The hanger driving unit <NUM> vibrates integrally with the hanger driven unit 431b.

The hanger driving unit <NUM> may be disposed on the connection axis Oh. The hanger driving unit <NUM> may be disposed between the rotational axis Ow1 and Ow2 and the center Mm of mass of the motor <NUM>. When viewed from the direction in which the first rotational axis Ow1 extends, the hanger driving unit <NUM> is fixed to the hanger body, in a position between the center Mm of mass of the motor <NUM> and the first rotational axis Ow1.

The vibration module <NUM> comprises an elastic member locking portion <NUM> on which one end of the elastic member <NUM> is locked. When the vibration module <NUM> reciprocates to the left and right, the elastic member <NUM> is elastically deformed by the elastic member locking portion <NUM>, or the restoring force of the elastic member <NUM> is transmitted to the elastic member locking portion <NUM>. The elastic member locking portion <NUM> is disposed on the weight casing 51b.

The elastic member locking portion <NUM> may comprise a first locking portion 459a on which one end of the first elastic member 60a is locked. The first locking portion 459a may be formed on one side (+X) of the weight casing 51b. The elastic member locking portion <NUM> may comprise a second locking portion 459b on which one end of the second elastic member 460b is locked. The second locking portion 459b may be formed on the other side (-X) of the weight casing 51b.

The elastic member <NUM> may be disposed between the vibration module <NUM> and the supporting member <NUM>. One end of the elastic member <NUM> is locked on the vibration module <NUM>, and the other end is locked on an elastic member mounting portion <NUM> of the supporting member <NUM>. The elastic member <NUM> may comprise a tension spring and/or a compression spring. A pair of elastic members 460a and 460b may be disposed on both sides of the connection axis Oh in the vibration direction (+X, -X).

A plurality of elastic members 460a and 460b may be provided. The elastic members 460a and 460b may be configured to elastically deform when the vibration module <NUM> moves to one side in the vibration direction (+X, -X) and regain their elasticity when it moves to the other side. The elastic members 460a and 460b may be configured to elastically deform when the hanger body <NUM> moves to one side in the vibration direction (+X, -X) and regain their elasticity when it moves to the other side.

The first elastic member 460a is disposed on one side (+X) of the vibrating body <NUM>. One end of the first elastic member 460a may be locked on the first locking portion 459a, and the other end may be locked on a first mounting portion 477a of the supporting member <NUM>. The first elastic member 460a may comprise a spring that elastically deforms in the vibration direction (+X, -x) and regains its elasticity.

The second elastic member 460b is disposed on the other side (-X) of the vibrating body <NUM>. One end of the second elastic member 460b may be locked on the second locking portion 459b, and the other end may be locked on a second mounting portion 477b of the supporting member <NUM>. The second elastic member 460b may comprise a spring that elastically deforms in the vibration direction (+X, -x) and regains its elasticity.

The supporting member <NUM> comprises an elastic member mounting portion <NUM> where one end of the elastic member <NUM> is fixed. The elastic member mounting portion <NUM> is fixed to the frame <NUM>. The elastic member mounting portion <NUM> may be fixed to the interior frame 11a. The first mounting portion 477a and the second mounting portion 477b are placed apart from each other, in opposite directions with respect to the connection axis Oh.

Claim 1:
A clothes treatment apparatus (<NUM>) comprising:
a frame (<NUM>);
a hanger body (<NUM>, <NUM>) configured to move with respect to the frame and provided to hang clothes or clothes hangers; and
a vibrating body (<NUM>, <NUM>) configured to move with respect to the frame;
characterized by further comprising:
a first eccentric portion (<NUM>) that is supported by the vibrating body and rotates around a predetermined first rotational axis (Ow1) in such a way that the weight of the first eccentric portion is off-center;
a second eccentric portion (<NUM>) that is supported by the vibrating body and rotates around a predetermined second rotational axis (Ow2), which is the same as or parallel to the first rotational axis, in such a way that the weight of the second eccentric portion is off-center; and
a hanger driving unit (<NUM>, <NUM>) that connects the vibrating body and the hanger body and transmits the vibration of the vibrating body to the hanger body,
wherein the first eccentric portion and the second eccentric portion are configured to rotate at the same angular speed but in opposite directions, and
wherein the hanger body is configured to move with respect to the frame in a predetermined vibration direction (+X, -X), and when the weight of the first eccentric portion is off-centered toward one side (D2) in a direction (+Y, -Y) intersecting the vibration direction (+X, -X) with respect to the first rotational axis, the weight of the second eccentric portion is off-centered toward the opposite side of the one side (D2) with respect to the second rotational axis, wherein, when the weight of the first eccentric portion is off-centered toward one side (D1) in the vibration direction (+X, -X) with respect to the first rotational axis, the weight of the second eccentric portion is off-centered toward the one side (D1) with respect to the second rotational axis.