Office Action 1: Non-Final Rejection (2025-06-02)
Rejection types: 102 - Lack of Novelty, 103 - Obviousness

CLAIMS:
WHAT IS CLAIMED IS:

1\. A clothes treating apparatus comprising:
a housing;
a tub inside the housing;
a drum configured to be rotated inside the tub;
a spin-drying shaft connected to the drum;
a motor assembly including a rotor configured to be rotated;
a coupler;
a first element; and
a second element inside the coupler,
wherein the coupler is positionable in a first position in which the coupler is coupled to the spin-drying shaft and the rotor,the coupler is positionable in a second position in which the coupler is coupled to the spin-drying shaft and disengaged from the rotor, and
with the coupler being positioned in the second position, the first element and the second element are configured to interact to move the second element away from the first element and thereby move the coupler from the second position to the first position.

2\. The clothes treating apparatus of claim 1, wherein the first element includes a coil configured to form a magnetic field in response to application of a current to the coil, and
the second element is movable to be close to or away from the first element by the magnetic field formed by the coil.

3\. The clothes treating apparatus of claim 1, wherein the rotor is located on a first side of the coupler in a direction in which the coupler is moved to the first position, and
in order to prevent interference between the coupler and the rotor, the first element is positioned between the coupler and the tub so that the first element is positioned on a second side of the coupler opposite to the first side of the coupler.

4\. The clothes treating apparatus of claim 1, wherein the rotor has a mounting space inside the rotor,
the clothes treating apparatus further comprises:a stator arranged about the spin-drying shaft and configured so that least a portion of the stator is positioned in the mounting space,
the stator includes a stator space inside the stator,
at least a portion of the coupler is positioned in the stator space, and
the first element is positioned in the stator space.

5\. The clothes treating apparatus of claim 4, wherein the spin-drying shaft configured to passes through the stator space, and
the first element includes a coil wound in a circumferential direction with respect to the spin-drying shaft.

6\. The clothes treating apparatus of claim 1, wherein the first element has a cross section having a horizontal length that is greater than a vertical length.

7\. The clothes treating apparatus of claim 1, wherein the second element is in contact with the coupler, and is coupled to the coupler at a side of the coupler facing the first element.

8\. The clothes treating apparatus of claim 7, wherein the coupler includes a receiving space inside of the coupler, and
the second element is positioned in the receiving space.

9\. The clothes treating apparatus of claim 7, wherein the second element is positioned to correspond to the first element.

10\. The clothes treating apparatus of claim 1, wherein the first element includes a plurality of coils, and
the plurality of coils are arranged in a circumferential direction with respect to 64 the spin-drying shaft so that a magnetic field is formable at a position in which the plurality of coils is arranged.

11\. The clothes treating apparatus of claim 10, wherein the plurality of coils includes:a first coil layer spaced apart from the coupler by a first distance, and
a second coil layer spaced apart from the coupler by a second distance that is greater than the first distance, and
the second coil layer is independently controlled from the first coil layer.

12\. The clothes treating apparatus of claim 1, wherein the first element includes a plurality of part elements arranged in a circumferential direction with respect to the spin-drying shaft, and connected to each other so that all of the plurality of part elements are controllable with a single control signal.

13\. The clothes treating apparatus of claim 4, wherein the stator space includes:a central space through which the spin-drying shaft passes, and
a branch space communicated with the central space and disposed in a circumferential direction with respect to the central space, and
the first element includes:a first part element in the central space, and a second part element in the branch space.

14\. The clothes treating apparatus of claim 1, wherein the first element includes a coil wound around the spin-drying shaft to form a magnetic field corresponding to the spin-drying shaft.

15\. The clothes treating apparatus of claim 1, further comprising:
a pulsator configured to be rotated inside the drum;
a reduction gear module coupled to the rotor so that least a portion of the reduction gear module is rotatable at an angular velocity that is lower than an angular 65 velocity of the rotor; and
a washing shaft coupled to the pulsator and the reduction gear module to allow the pulsator to be rotated at the angular velocity that is lower than the angular velocity of the rotor,
wherein the coupler is configured to be couplable to the spin-drying shaft and the rotor so that the spin-drying shaft is allowed to be rotated at the angular velocity of the rotor.

OFFICE ACTION:
DETAILED ACTION
Notice of Pre-AIA  or AIA  Status
The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA .
Claim Objections
Claims 2 and 11 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims.
Regarding claim 2, Song fails to teach or suggest the first element includes a coil configured to form a magnetic field in response to application of a current to the coil, and the second element is movable to be close to or away from the first element by the magnetic field formed by the coil.
Regarding claim 11, Song fails to teach or suggest the plurality of coils includes: a first coil layer spaced apart from the coupler by a first distance, and a second coil layer spaced apart from the coupler by a second distance that is greater than the first distance, and the second coil layer is independently controlled from the first coil layer.
Claim Rejections - 35 USC § 102
The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action:
A person shall be entitled to a patent unless –
(a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention.
Claim(s) 1, 3-5, 7-10, and 12-15  is/are rejected under 35 U.S.C. 102(a)(2) as being anticipated by Song (US 2022/0064842).
Regarding claim 1, Song figures 1-14 teach a clothes treating apparatus comprising:
a housing (10 case);
a tub (20) inside the housing;
a drum (30) configured to be rotated inside the tub;
a spin-drying shaft (120 dewatering shaft) connected to the drum;
a motor assembly (100 driver) including a rotor (190) configured to be rotated;
a coupler (150 coupler);
a first element (177 clutch lever); and
a second element (serration) inside the coupler.[0051, 0064-67, 0071, 0121-122]
Song teaches the clutch lever 177 moves downward, the coupler 150 is lowered due to weight thereof and pushing force of the compression spring. When the coupler 150 is completely lowered along the lower dewatering shaft 125, the connecting gear 155 formed at a lower portion of the coupler 150 is engaged with the engaging portion 198 of the rotor 190. When the coupler 150 is completely lowered, the coupler 150 is coupled to the rotor 190 and is in a state of being coupled to the lower dewatering shaft 125. In this case, since the coupler 150 simultaneously transfers rotational force generated by the rotor 190 to the lower washing shaft 115 and the lower dewatering shaft 125, the washing shaft 115 and the dewatering shaft 125 rotate at high speed, thereby performing dewatering thereby reading on the coupler is positionable in a first position in which the coupler is coupled to the spin-drying shaft and the rotor.[0127-128]
Song teaches as the clutch lever 177 moves upward, the clutch lever 177 pushes the coupler 150 upward, so that the coupler 150 rises along the lower dewatering shaft 125. Then, the coupler 150 is disengaged from the rotor 190 and is coupled to the lower dewatering shaft 125. In this case, the coupler 150 is released from the rotor 190 so that only the washing shaft 110 rotates when the rotor 190 rotates thereby reading on the coupler is positionable in a second position in which the coupler is coupled to the spin-drying shaft and disengaged from the rotor.[0120]
Song teaches  in the washing mode, since the serration formed on the inner circumferential surface of the coupler 150 is engaged only with the serration of the outer circumferential surface of the lower dewatering shaft 125 and is not engaged with the serration of the engaging portion 198 engaged with the lower washing shaft 115, rotational force of the rotor 190 is transferred only to the pulsator 50 through the washing shaft 110 thereby suggesting with the coupler being positioned in the second position, the first element and the second element are configured to interact to move the second element away from the first element and thereby move the coupler from the second position to the first position.[0121]
Regarding claim 3, Song figure 5 teaches the rotor (190) is located on a first side of the coupler (150) in a direction in which the coupler is moved to the first position, and in order to prevent interference between the coupler and the rotor, the first element is positioned between the coupler and the tub so that the first element is positioned on a second side of the coupler opposite to the first side of the coupler.
Regarding claim 4, figure 5 teaches the rotor (190) has a mounting space inside the rotor, the clothes treating apparatus further comprises: a stator (180) arranged about the spin-drying shaft and configured so that least a portion of the stator is positioned in the mounting space, the stator includes a stator space inside the stator, at least a portion of the coupler is positioned in the stator space, and the first element is positioned in the stator space.
Regarding claim 5, figure 9 teaches the spin-drying shaft (110, 111) configured to passes through the stator space, and the first element includes a coil (182) wound in a circumferential direction with respect to the spin-drying shaft.
Regarding claim 7, figure 7 suggests the second element is in contact with the coupler, and is coupled to the coupler at a side of the coupler facing the first element.
Regarding claim 8, figure 7 suggests the coupler includes a receiving space inside of the coupler, and the second element is positioned in the receiving space.
Regarding claim 9, Song teaches the couple has a serration having an outer circumferential surface that may be engaged with a rotor of the driving motor. When the coupler rises, the coupler releases coupling between the dewatering shaft and the rotor and, when the coupler descends, the coupler is engaged with the rotor to transfer rotational force of the rotor to the dewatering shaft thereby suggesting the second element is positioned to correspond to the first element.[0009]
Regarding claim 10, figure 5 teaches the first element includes a plurality of coils (182), and the plurality of coils are arranged in a circumferential direction with respect to the spin-drying shaft so that a magnetic field is formable at a position in which the plurality of coils is arranged.
Regarding claim 12, figure 7 teaches the clutch lever 177 may include a connection portion 177a coupled to an end of the plunger 175, a support portion 177b extending from the connection portion 177a toward the coupler 150, and a fixing pin 177c extending from both side edges of the connection portion 177a to serve as a rotation center of the clutch lever 177. The fixing pin 177c may be defined as a hinge shaft thereby reading on the first element includes a plurality of part elements arranged in a circumferential direction with respect to the spin-drying shaft, and connected to each other so that all of the plurality of part elements are controllable with a single control signal.[0109]
Regarding claim 13, figure 5 teaches the stator space includes: a central space through which the spin-drying shaft passes, and a branch space communicated with the central space and disposed in a circumferential direction with respect to the central space, and the first element includes: a first part element in the central space, and a second part element in the branch space.
Regarding claim 14, figure 5 teaches the first element includes a coil wound (182) around the spin-drying shaft to form a magnetic field corresponding to the spin-drying shaft.
Regarding claim 15, figures 1 and 6 teach a pulsator (50) configured to be rotated inside the drum; a reduction gear module (140) coupled to the rotor so that least a portion of the reduction gear module is rotatable at an angular velocity that is lower than an angular  velocity of the rotor (intended use, reduction gear of Song is capable to perform the claimed limitation); and a washing shaft (110) coupled to the pulsator and the reduction gear module to allow the pulsator to be rotated at the angular velocity that is lower than the angular velocity of the rotor, wherein the coupler is configured to be couplable to the spin-drying shaft and the rotor so that the spin-drying shaft is allowed to be rotated at the angular velocity of the rotor.
Claim Rejections - 35 USC § 103
The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action:
A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made.
The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows:
1. Determining the scope and contents of the prior art.
2. Ascertaining the differences between the prior art and the claims at issue.
3. Resolving the level of ordinary skill in the pertinent art.
4. Considering objective evidence present in the application indicating obviousness or nonobviousness.
Claim(s) 6 is/are rejected under 35 U.S.C. 103 as being unpatentable over Song (US 2022/0064842) as applied to claim 1.
Regarding claim 6, Song is silent to the first element has a cross section having a horizontal length that is greater than a vertical length.
It would have been obvious to one of ordinary skill in the art before the effective filing date of the present invention to provide the first element has a cross section having a horizontal length that is greater than a vertical length as a change in size/proportion is an obvious modification.(MPEP 2144.04)
Conclusion


NEXT OFFICE ACTION: DETAILED ACTION
Reasons for Allowance
The following is an examiner’s statement of reasons for allowance: the allowable subject matter indicated in the non-final rejection has been added to claim 1. Song (US 2022/0064842) fails to teach or suggest the claimed invention.
Song figures 1-14 teach a clothes treating apparatus comprising:
a housing (10 case);
a tub (20) inside the housing;
a drum (30) configured to be rotated inside the tub;
a spin-drying shaft (120 dewatering shaft) connected to the drum;
a motor assembly (100 driver) including a rotor (190) configured to be rotated;
a coupler (150 coupler);
a first element (177 clutch lever); and
a second element (serration) inside the coupler.[0051, 0064-67, 0071, 0121-122]
Song teaches the clutch lever 177 moves downward, the coupler 150 is lowered due to weight thereof and pushing force of the compression spring. When the coupler 150 is completely lowered along the lower dewatering shaft 125, the connecting gear 155 formed at a lower portion of the coupler 150 is engaged with the engaging portion 198 of the rotor 190. When the coupler 150 is completely lowered, the coupler 150 is coupled to the rotor 190 and is in a state of being coupled to the lower dewatering shaft 125. In this case, since the coupler 150 simultaneously transfers rotational force generated by the rotor 190 to the lower washing shaft 115 and the lower dewatering shaft 125, the washing shaft 115 and the dewatering shaft 125 rotate at high speed, thereby performing dewatering thereby reading on the coupler is positionable in a first position in which the coupler is coupled to the spin-drying shaft and the rotor.[0127-128]
Song teaches as the clutch lever 177 moves upward, the clutch lever 177 pushes the coupler 150 upward, so that the coupler 150 rises along the lower dewatering shaft 125. Then, the coupler 150 is disengaged from the rotor 190 and is coupled to the lower dewatering shaft 125. In this case, the coupler 150 is released from the rotor 190 so that only the washing shaft 110 rotates when the rotor 190 rotates thereby reading on the coupler is positionable in a second position in which the coupler is coupled to the spin-drying shaft and disengaged from the rotor.[0120]
Song teaches  in the washing mode, since the serration formed on the inner circumferential surface of the coupler 150 is engaged only with the serration of the outer circumferential surface of the lower dewatering shaft 125 and is not engaged with the serration of the engaging portion 198 engaged with the lower washing shaft 115, rotational force of the rotor 190 is transferred only to the pulsator 50 through the washing shaft 110 thereby suggesting with the coupler being positioned in the second position, the first element and the second element are configured to interact to move the second element away from the first element and thereby move the coupler from the second position to the first position.[0121]
Song fails to teach or suggest the first element includes a coil configured to form a magnetic field in response to application of a current to the coil, and the second element is movable to be close to or away from the first element by the magnetic field formed by the coil.
Conclusion
Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee.  Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.”

CITED REFERENCE SUMMARIES: Ref US20220064842A1: Claims:
A laundry treatment apparatus comprising: a case; a tub disposed inside the case and configured to accommodate washing water; a drum rotatably disposed inside the tub and configured to accommodate laundry; a pulsator disposed inside the drum and configured to rotate based on receiving driving force; and a driver configured to supply the driving force for rotating the drum and the pulsator, wherein the driver comprises: a driving motor comprising a stator and a rotor, a bearing housing disposed at a lower portion of the tub, a dewatering shaft having a lower end disposed adjacent to the rotor and an upper end connected to the drum, the dewatering shaft defining a through-hole therein, a coupler configured to selectively connect the dewatering shaft to the rotor based on moving upward and downward along an outer circumferential surface of the dewatering shaft, a washing shaft disposed inside the through-hole of the dewatering shaft and configured to rotate the pulsator, the washing shaft having a lower end connected to the rotor and an upper end connected to the pulsator, and an anti-friction member disposed between the dewatering shaft and the washing shaft, wherein the washing shaft defines a fixing groove that is recessed inward from an outer circumferential surface of the washing shaft and extends along a circumferential direction, and wherein the driver further comprises: a fixing ring disposed in the fixing groove, wherein an outer circumferential surface of the fixing ring radially protrudes outward relative to the outer circumferential surface of the washing shaft, a washer housing disposed between the anti-friction member and the fixing ring, and a wave washer accommodated inside the washer housing.
a tub disposed inside the case and configured to accommodate washing water;
a drum rotatably disposed inside the tub and configured to accommodate laundry;
a pulsator disposed inside the drum and configured to rotate based on receiving driving force; and
a driver configured to supply the driving force for rotating the drum and the pulsator,
wherein the driver comprises: a driving motor comprising a stator and a rotor, a bearing housing disposed at a lower portion of the tub, a dewatering shaft having a lower end disposed adjacent to the rotor and an upper end connected to the drum, the dewatering shaft defining a through-hole therein, a coupler configured to selectively connect the dewatering shaft to the rotor based on moving upward and downward along an outer circumferential surface of the dewatering shaft, a washing shaft disposed inside the through-hole of the dewatering shaft and configured to rotate the pulsator, the washing shaft having a lower end connected to the rotor and an upper end connected to the pulsator, and an anti-friction member disposed between the dewatering shaft and the washing shaft,
a driving motor comprising a stator and a rotor,
a bearing housing disposed at a lower portion of the tub,
a dewatering shaft having a lower end disposed adjacent to the rotor and an upper end connected to the drum, the dewatering shaft defining a through-hole therein,
a coupler configured to selectively connect the dewatering shaft to the rotor based on moving upward and downward along an outer circumferential surface of the dewatering shaft,
a washing shaft disposed inside the through-hole of the dewatering shaft and configured to rotate the pulsator, the washing shaft having a lower end connected to the rotor and an upper end connected to the pulsator, and
an anti-friction member disposed between the dewatering shaft and the washing shaft,
wherein the washing shaft defines a fixing groove that is recessed inward from an outer circumferential surface of the washing shaft and extends along a circumferential direction, and
wherein the driver further comprises: a fixing ring disposed in the fixing groove, wherein an outer circumferential surface of the fixing ring radially protrudes outward relative to the outer circumferential surface of the washing shaft, a washer housing disposed between the anti-friction member and the fixing ring, and a wave washer accommodated inside the washer housing.
a fixing ring disposed in the fixing groove, wherein an outer circumferential surface of the fixing ring radially protrudes outward relative to the outer circumferential surface of the washing shaft,
a washer housing disposed between the anti-friction member and the fixing ring, and
a wave washer accommodated inside the washer housing.
The laundry treatment apparatus of claim 1 , wherein the washer housing covers an outer circumferential surface of the wave washer.
The laundry treatment apparatus of claim 1 , wherein the washer housing comprises: a first portion in contact with the anti-friction member, a second portion in contact with the fixing ring, and a connecting portion that connects the first portion to the second portion and covers an outer circumferential surface of the wave washer.
a first portion in contact with the anti-friction member,
a second portion in contact with the fixing ring, and
a connecting portion that connects the first portion to the second portion and covers an outer circumferential surface of the wave washer.
The laundry treatment apparatus of claim 3 , wherein the wave washer is in contact with an inner surface of each of the first portion, the second portion, and the connecting portion of the washer housing.
The laundry treatment apparatus of claim 3 , wherein the first portion of the washer housing covers at a least a portion of a first surface of the wave washer facing the anti-friction member, and wherein the second portion of the washer housing covers at least a portion of a second surface of the wave washer facing the fixing ring.
wherein the second portion of the washer housing covers at least a portion of a second surface of the wave washer facing the fixing ring.
The laundry treatment apparatus of claim 5 , wherein the first portion of the washer housing defines a first opening that exposes a portion of the first surface of the wave washer to the anti-friction member, and wherein the second portion of the washer housing defines a second opening that exposes a portion of the second surface of the wave washer to the fixing ring.
wherein the second portion of the washer housing defines a second opening that exposes a portion of the second surface of the wave washer to the fixing ring.
The laundry treatment apparatus of claim 6 , wherein the first opening is one of a plurality of first openings defined at the first portion of the washer housing, and wherein the second opening is one of a plurality of second openings defined at the second portion of the washer housing.
wherein the second opening is one of a plurality of second openings defined at the second portion of the washer housing.
The laundry treatment apparatus of claim 7 , wherein a number of the plurality of first openings is equal to a number of the plurality of second openings, and wherein a position of each of the plurality of first openings corresponds to a position of one of the plurality of second openings.
wherein a position of each of the plurality of first openings corresponds to a position of one of the plurality of second openings.
The laundry treatment apparatus of claim 3 , wherein the washer housing further defines a washer exposing space at an inner circumferential surface of the washer housing, and wherein an inner circumferential surface of the wave washer is exposed to the washing shaft through the washer exposing space of the washer housing.
wherein an inner circumferential surface of the wave washer is exposed to the washing shaft through the washer exposing space of the washer housing.
The laundry treatment apparatus of claim 1 , wherein the wave washer and the washer housing are made of different materials from each other.
The laundry treatment apparatus of claim 1 , wherein the anti-friction member comprises a bearing.
The laundry treatment apparatus of claim 1 , wherein the washing shaft comprises an upper washing shaft and a lower washing shaft that are arranged along an axial direction, the lower washing shaft being disposed vertically below the upper washing shaft, and wherein the anti-friction member is disposed between an outer circumferential surface of the lower washing shaft and an inner circumferential surface of the dewatering shaft.
wherein the anti-friction member is disposed between an outer circumferential surface of the lower washing shaft and an inner circumferential surface of the dewatering shaft.
The laundry treatment apparatus of claim 1 , wherein the washer housing is disposed at the lower end of the dewatering shaft, and the fixing ring is disposed vertically below the washer housing.
The laundry treatment apparatus of claim 1 , wherein the wave washer has a circular shape surrounding the washing shaft.
The laundry treatment apparatus of claim 14 , wherein at least one of a top surface of the wave washer or a bottom surface of the wave washer defines a waveform that protrudes upward or downward.
The laundry treatment apparatus of claim 15 , wherein the washer housing has a shape corresponding to the waveform of the wave washer.
The laundry treatment apparatus of claim 15 , wherein an upper surface of the washer housing is in contact with the anti-friction member, and wherein a lower surface of the washer housing is in contact with the fixing ring.
wherein a lower surface of the washer housing is in contact with the fixing ring.
The laundry treatment apparatus of claim 17 , wherein the upper surface of the washer housing defines a plurality of first openings that are arranged along the circumferential direction, each of the plurality of first openings having an elongated shape in the circumferential direction, wherein the lower surface of the washer housing defines a plurality of second openings that are arranged along the circumferential direction, each of the plurality of second openings having the elongated shape in the circumferential direction, and wherein the wave washer is exposed to an outside of the washer housing through the plurality of first openings and the plurality of second openings.
wherein the lower surface of the washer housing defines a plurality of second openings that are arranged along the circumferential direction, each of the plurality of second openings having the elongated shape in the circumferential direction, and
wherein the wave washer is exposed to an outside of the washer housing through the plurality of first openings and the plurality of second openings.
The laundry treatment apparatus of claim 18 , wherein a number of the plurality of first openings is equal to a number of the plurality of second openings.
The laundry treatment apparatus of claim 18 , wherein the washer housing further defines a washer exposing space at an inner circumferential surface of the washer housing, and wherein an inner circumferential surface of the wave washer is exposed to the washing shaft through the washer exposing space of the washer housing.
Ref US20220064842: Claims:
1. A laundry treatment apparatus comprising:
a case; a tub disposed inside the case and configured to accommodate washing water; a drum rotatably disposed inside the tub and configured to accommodate laundry; a pulsator disposed inside the drum and configured to rotate based on receiving driving force; and a driver configured to supply the driving force for rotating the drum and the pulsator, wherein the driver comprises:
a driving motor comprising a stator and a rotor,
a bearing housing disposed at a lower portion of the tub,
a dewatering shaft having a lower end disposed adjacent to the rotor and an upper end connected to the drum, the dewatering shaft defining a through-hole therein,
a coupler configured to selectively connect the dewatering shaft to the rotor based on moving upward and downward along an outer circumferential surface of the dewatering shaft,
a washing shaft disposed inside the through-hole of the dewatering shaft and configured to rotate the pulsator, the washing shaft having a lower end connected to the rotor and an upper end connected to the pulsator, and
an anti-friction member disposed between the dewatering shaft and the washing shaft,
 wherein the washing shaft defines a fixing groove that is recessed inward from an outer circumferential surface of the washing shaft and extends along a circumferential direction, and wherein the driver further comprises:
a fixing ring disposed in the fixing groove, wherein an outer circumferential surface of the fixing ring radially protrudes outward relative to the outer circumferential surface of the washing shaft,
a washer housing disposed between the anti-friction member and the fixing ring, and
a wave washer accommodated inside the washer housing.
2. The laundry treatment apparatus of claim 1, wherein the washer housing covers an outer circumferential surface of the wave washer.
3. The laundry treatment apparatus of claim 1, wherein the washer housing comprises:
a first portion in contact with the anti-friction member, a second portion in contact with the fixing ring, and a connecting portion that connects the first portion to the second portion and covers an outer circumferential surface of the wave washer.
4. The laundry treatment apparatus of claim 3, wherein the wave washer is in contact with an inner surface of each of the first portion, the second portion, and the connecting portion of the washer housing.
5. The laundry treatment apparatus of claim 3, wherein the first portion of the washer housing covers at a least a portion of a first surface of the wave washer facing the anti-friction member, and
wherein the second portion of the washer housing covers at least a portion of a second surface of the wave washer facing the fixing ring.
6. The laundry treatment apparatus of claim 5, wherein the first portion of the washer housing defines a first opening that exposes a portion of the first surface of the wave washer to the anti-friction member, and
wherein the second portion of the washer housing defines a second opening that exposes a portion of the second surface of the wave washer to the fixing ring.
7. The laundry treatment apparatus of claim 6, wherein the first opening is one of a plurality of first openings defined at the first portion of the washer housing, and
wherein the second opening is one of a plurality of second openings defined at the second portion of the washer housing.
8. The laundry treatment apparatus of claim 7, wherein a number of the plurality of first openings is equal to a number of the plurality of second openings, and
wherein a position of each of the plurality of first openings corresponds to a position of one of the plurality of second openings.
9. The laundry treatment apparatus of claim 3, wherein the washer housing further defines a washer exposing space at an inner circumferential surface of the washer housing, and
wherein an inner circumferential surface of the wave washer is exposed to the washing shaft through the washer exposing space of the washer housing.
10. The laundry treatment apparatus of claim 1, wherein the wave washer and the washer housing are made of different materials from each other.
11. The laundry treatment apparatus of claim 1, wherein the anti-friction member comprises a bearing.
12. The laundry treatment apparatus of claim 1, wherein the washing shaft comprises an upper washing shaft and a lower washing shaft that are arranged along an axial direction, the lower washing shaft being disposed vertically below the upper washing shaft, and
wherein the anti-friction member is disposed between an outer circumferential surface of the lower washing shaft and an inner circumferential surface of the dewatering shaft.
13. The laundry treatment apparatus of claim 1, wherein the washer housing is disposed at the lower end of the dewatering shaft, and the fixing ring is disposed vertically below the washer housing.
14. The laundry treatment apparatus of claim 1, wherein the wave washer has a circular shape surrounding the washing shaft.
15. The laundry treatment apparatus of claim 14, wherein at least one of a top surface of the wave washer or a bottom surface of the wave washer defines a waveform that protrudes upward or downward.
16. The laundry treatment apparatus of claim 15, wherein the washer housing has a shape corresponding to the waveform of the wave washer.
17. The laundry treatment apparatus of claim 15, wherein an upper surface of the washer housing is in contact with the anti-friction member, and
wherein a lower surface of the washer housing is in contact with the fixing ring.
18. The laundry treatment apparatus of claim 17, wherein the upper surface of the washer housing defines a plurality of first openings that are arranged along the circumferential direction, each of the plurality of first openings having an elongated shape in the circumferential direction,
wherein the lower surface of the washer housing defines a plurality of second openings that are arranged along the circumferential direction, each of the plurality of second openings having the elongated shape in the circumferential direction, and wherein the wave washer is exposed to an outside of the washer housing through the plurality of first openings and the plurality of second openings.
19. The laundry treatment apparatus of claim 18, wherein a number of the plurality of first openings is equal to a number of the plurality of second openings.
20. The laundry treatment apparatus of claim 18, wherein the washer housing further defines a washer exposing space at an inner circumferential surface of the washer housing, and
wherein an inner circumferential surface of the wave washer is exposed to the washing shaft through the washer exposing space of the washer housing.