KR20200082339A - Washing machine - Google Patents

Abstract

A washing machine of the present invention includes: a dehydration shaft having a first hollow and having a track formed on the outer circumferential surface thereof to extend in a circumferential direction; a ball movable along the track; a washing tub connected to the dehydration shaft; a drive shaft disposed in the first hollow; a motor for rotating the drive shaft; a pulsator disposed in the washing tub and rotated by a rotational force transmitted from the drive shaft; a clutching coupler which has an inner circumferential surface that defines a second hollow, through which the dehydration shaft passes, and is spline-coupled with the outer circumferential surface of the dehydration shaft, which axially connects the drive shaft with the dehydration shaft at a connection position, and which is separated from the drive shaft at a disconnection position raised from the connection position; a solenoid for forming a magnetic field when a current is applied thereto; and an armature disposed to be elevated along with the clutching coupler in an axial direction, and raised by the magnetic field. The inner circumferential surface of the clutching coupler has a guide groove which is engaged with the ball and guides the ball so that the same is moved along the track in response to an elevating operation of the clutching coupler. The guide groove includes a descending guide surface coming into contact with the ball while the clutching coupler is lowered, and an ascending guide surface which is provided below the descending guide surface and comes into contact with the ball while the clutching coupler is raised. The descending guide surface is formed as a concave valley having an open lower side and has a disconnection retaining valley in which the ball is positioned when the clutching coupling is positioned at the disconnection position. Therefore, the washing machine can maintain a connected state (or disconnection state) even when applying a current to the solenoid only when the drive shaft and the dehydration shaft are connected (or disconnected).

Description

Washing machine {WASHING MACHINE}

The present invention relates to a washing machine having a clutch system that connects or disconnects a drive shaft and a dehydration shaft.

A washing machine having a clutch that is operated by a solenoid and selectively connects (or axles) or disconnects (or releases axles) to a washing shaft and a dewatering shaft is well known. For example, in Korean Patent Publication No. 2003-0023316 (hereinafter referred to as "prior art"), a dehydration and serration-coupled slider is formed by the suction force of the solenoid, and a driving mechanism formed in the rotor of the washing motor. It is disclosed a structure separated from the (具).

However, such a conventional technique has a problem in that current must be continuously applied to the solenoid in order to keep the slider and the rotor separated from each other.

First, the present invention provides a washing machine in which the connection (or disconnection) state is maintained even when a current is applied to the solenoid only when the drive shaft and the dehydration shaft are connected (or disconnected).

Second, to provide a washing machine that simplifies the clutching system that connects the drive shaft for rotating the pulsator and the dehydration shaft for rotating the washing tank to each other.

Third, to reduce the number of parts of the clutch system, and to provide a washing machine that eliminates the separate motors and various components interworking therewith, which were conventionally used to operate the clutch system.

In the washing machine of the present invention, a first hollow is formed in a dehydration shaft connected to a washing tank, and a drive shaft inserted in the first hollow is rotated by a motor. A pulsator rotated by the driving shaft is provided in the washing tank. A track extending along a circumferential direction is formed on an outer circumferential surface of the dehydration shaft, and a ball is movably provided along the track.

A clutching coupler having a second hollow through which the dehydration passes is provided. In the clutching coupler, an inner circumferential surface defining the second hollow is spline-coupled with the outer circumferential surface of the dehydration shaft, and is movable along the dehydration shaft.

The clutching coupler joints the drive shaft and the dehydration shaft at a predetermined connection position, and is separated from the drive shaft at a connection release position raised from the connection position. That is, the shaft joint (connection) of the drive shaft and the dehydration shaft is made when the clutching coupler is in the connection position, and the separation (shaft joint release) of the drive shaft and the dehydration shaft is performed by the clutching coupler. It rises from and is made when the connection release position is reached.

The clutching coupler is moved together with the contactor. The polarizer is arranged to be elevated with the clutching coupler along the axial direction, and is raised by a magnetic field formed by a solenoid.

On the inner circumferential surface of the clutching coupler, a guide groove is formed that engages the ball and guides the ball to move along the track in response to the lifting operation of the clutching coupler.

The guide groove includes a descending guide surface in contact with the ball in the process of lowering the clutching coupler, and a rising guide surface in contact with the ball in the process of raising the clutching coupler under the lower guide surface.

On the descending guide surface, the lower side consists of an open concave bone, and when the clutching coupler is in the disengagement position, a disengagement maintaining bone in which the ball is located in the goal is formed.

The descending guide surface may include a descending slope section that gradually descends in the circumferential direction from the disconnection maintaining bone. On the rising guide surface, a first stop goal may be formed on a side that has progressed in the circumferential direction more than the lowest point of the descending slope section. The descending guide surface may include a first ascending guide section that gradually increases in the circumferential direction from a point on the vertical side of the first stop goal.

On the descending guide surface, when the clutching coupler is in the connection position on the upper end of the first ascending guide section, a connection maintaining goal in which the ball is located may be formed.

The upward guide surface may include a first downward guide section gradually descending along the circumferential direction from a point at a vertically lower side of the disconnection maintaining goal to reach the first stop goal. The descending guide surface is formed on an upper portion of the first ascending guide section and the first ascending guide section which gradually increases and extends along the circumferential direction from a point at the upper vertical side of the first stop goal, and the disconnection maintaining goal It may include a connection maintaining goal formed at a higher position.

The upward guide surface may include a second downward guide section gradually descending along the circumferential direction from a point at a vertically lower side of the connection maintaining goal, and a second stop goal formed at a lower end of the second downward guide section.

When the clutching coupler is in the disconnected position, an elastic member that presses the clutching coupler downward may be further provided.

The washing machine of the present invention has an effect of reducing power consumption because connection or disconnection of the drive shaft and the dehydration shaft is maintained even when no current is applied to the solenoid.

In addition, the washing machine of the present invention has the effect of reducing the manufacturing cost of the product by removing the separate components and various components interlocked therewith, which were conventionally used to operate the clutch system.

1 is a longitudinal sectional view of a washing machine according to an embodiment of the present invention.
2 is an exploded perspective view of a portion of a washing machine according to an embodiment of the present invention.
3 is a perspective view of the rotor hub.
4 is an exploded view (a) and an assembled view (b) of the decontraction, ball, and coupler.
5 is a view showing a guide groove as an unfolded inner circumferential surface of the clutching coupler.
Figure 6 shows a part of the washing machine according to an embodiment of the present invention, (a) is an external view of the clutching coupler in a raised state to the disconnected position, (b) is a longitudinal sectional view of the part .
Figure 7 shows a part of the washing machine according to an embodiment of the present invention, (a) is an external view in a state in which the clutching coupler is lowered to the connection position, (b) is a longitudinal sectional view of the part.

1 is a longitudinal sectional view of a washing machine according to an embodiment of the present invention. 2 is an exploded perspective view of a portion of a washing machine according to an embodiment of the present invention. 3 is a perspective view of the rotor hub. 4 is an exploded view (a) and an assembled view (b) of the deshrinking, ball, and clutching couplers. 5 is a view showing a guide groove as an unfolded inner circumferential surface of the clutching coupler. Figure 6 shows a part of the washing machine according to an embodiment of the present invention, (a) is the appearance of the clutching coupler to the disengaged position, and (b) is a longitudinal sectional view of the part . Figure 7 shows a part of the washing machine according to an embodiment of the present invention, (a) is an external view in a state in which the clutching coupler is lowered to the connection position, (b) is a longitudinal sectional view of the part.

1 to 7, the casing 1 forms an external appearance of the washing machine, and forms a space in which the water storage tank 3 is accommodated. The casing 1 may include a cabinet 11 with an open top surface and a top cover 12 coupled to an open top surface of the cabinet 11 and having an inlet through which laundry is introduced into the center. A door (not shown) for opening and closing the inlet may be rotatably coupled to the top cover 12. The control panel 14 may be provided on the top cover 12. The control panel 14 includes an input unit (for example, a button, a dial, a touch pad, etc.) for receiving various control commands for controlling the operation of the washing machine from a user, and a display unit for visually displaying the operating state of the washing machine (for example, , LCD, LED display, etc.).

A water supply pipe 7 for guiding water supplied from an external water source such as a water tap, and a water supply valve 8 for controlling the water supply pipe 7 may be provided. The water supply valve 8 can be controlled by the control unit 17. The control unit 17 can control not only the water supply valve 8 but also the overall operation of the washing machine. The control unit 17 may include a microprocessor having a memory for data storage. Hereinafter, unless otherwise specified, it will be understood that control of the electric/electronic components constituting the washing machine is performed by the control unit 17.

In the top cover 12, a drawer 18 containing detergent may be retractable. The water supplied through the water supply valve 8 is mixed with the detergent while passing through the drawer 18, and then discharged into the water storage tank 3 or the washing tank 4.

A discharge pipe 21 for discharging water from the water storage tank 3 and a drain valve 22 for controlling the discharge pipe 21 may be provided. Water discharged through the discharge pipe 21 may be discharged to the outside of the washing machine through the drain pipe 25 by being pushed by the drain pump 24.

The washing tank 4 accommodates laundry, and is rotated about a vertical axis in the storage tank 3. The pulsator 5 is rotatably provided in the washing tank 4. The pulsator 5 is connected to the pulsator shaft 31. To allow water to flow between the water storage tank 3 and the washing tank 4, a plurality of through holes may be formed in the washing tank 4.

The drive shaft 6a is for rotating the pulsator 5 and is rotated by a motor 6. The drive shaft 6a is connected to the rotor 63 of the motor 6. The drive shaft 6a may be directly connected to the pulsator 5 (that is, the rotation ratio between the drive shaft and the pulsator is 1:1), but is not limited thereto, by converting the output of the drive shaft 6a into a predetermined speed ratio or torque ratio Planetary gear trains (not shown, planetary geartrains) for rotating the pulsator may be further provided.

The dehydration shaft 9 is connected to the washing tank 2 and is a tubular shape in which the first hollow 9h through which the drive shaft 4 passes is formed. A lower base of the washing tub 2 may be provided with a hub base 15 that is coupled to the bottom of the washing tub (2). The deshrinking 9 may be combined with the hub base 15.

A bearing housing 16 may be disposed under the reservoir 1. The bearing housing 16 may be coupled to the bottom surface of the reservoir 1. The bearing housing 16 may be provided with a bearing 19 that supports the dehydration 9.

The bearing housing 16 is coupled to the bottom surface of the water storage tank 3 by fastening members such as screws or bolts to form a space in which the bearing 19 is accommodated between the bottom surface of the water storage tank 3. An opening through which the dehydration shaft 9 passes is formed at the bottom of the bearing housing 16.

The motor 6 may be a brushless direct current (BLDC) motor of an outer rotor type. However, the type of the motor 6 is not limited to this. For example, the motor 6 may be an inner rotor type, and AC motors such as an induction motor and a shaded pole motor may be used. It can be made of a motor.

The motor 6 may include a stator 61 in which the stator coil 61b is wound around the stator core 61a, and a rotor frame 63 for fixing a plurality of permanent magnets 62 spaced apart in the circumferential direction. . A rotor hub 65 that connects the central portion of the rotor frame 63 with the drive shaft 6a may be further provided. The rotor frame 63 is rotated by the electromagnetic force acting between the plurality of permanent magnets 62 and the stator 61, and the drive shaft 6a is also rotated.

Meanwhile, the rotor hub 65 may include a rotor bush 65a coupled with the drive shaft 6a and a coupling flange 65b coupling the rotor bush 65a to the center of the rotor frame 63. The coupling flange 65b extends outwardly from the tubular flange body portion 65b1 and the flange body portion 65b1 into which the rotor bush 65a is inserted and engages the rotor frame 63 by fastening members such as screws or bolts. It may include a flange portion (65b2). In particular, engaging grooves 65b3 engaged with the clutching coupler 40 along the circumferential direction may be formed on the inner circumferential surface of the flange body portion 65b1.

The clutching coupler 40 is spline-coupled with the dehydration 9. The clutching coupler 40 is in the form of a tube forming the second hollow 40h through which the dehydration shaft 9 passes, and the inner circumferential surface defining the second hollow 40h is spline-coupled with the outer circumferential surface of the dehydration shaft 9. . Here, the spline coupling means that a spline protrusion 9a such as a tooth or a key extending in the axial direction is formed on one of the dehydration shaft 9 and the clutching coupler 40, and the other is formed on the other side. Spline grooves 9a (see Fig. 4) meshing with the spline protrusions 9a are formed, which means that the spline protrusions 9a and the spline grooves 41a mesh with each other. When the cross-section of the spline projection 9a is triangular, this is also referred to as serration. When the clutching coupler 40 is rotated by engagement between the spline groove 41a and the spline protrusion 9a, the dehydration shaft 9 is also rotated.

In an embodiment, the spline projection 9a is formed on the outer circumferential surface of the dehydration shaft 9, and the spline groove 41a is formed on the inner circumferential surface of the clutching coupler 40, but on the contrary, the spline projection is formed of the clutching coupler 40. It is formed on the inner peripheral surface, the spline groove may be formed on the outer peripheral surface of the dehydration (9).

The engagement (or engagement) between the spline groove 41a and the spline projection 9a is also to allow the lifting (or axial movement) of the clutching coupler 40. The clutching coupler 40 connects (connects) the drive shaft 6a and the dewatering shaft 9 at the connection position (see Fig. 7), and at the disconnection position (see Fig. 6) elevated from the connection position. It is separated from the drive shaft 6a.

The rising of the clutching coupler 40 from the connecting position to the disconnecting position is made by a solenoid 50 and a clutch 70, a plunger, or a core. The contact pole 70 is formed in a cylindrical shape and can be fitted to the dehydration shaft 9. The contact pole 70 is arranged to be lifted along the axial direction, and is raised by the magnetic field. The clutching coupler 40 is supported by the polarizer 70, and accordingly, the clutching coupler 40 is also moved (elevated) according to the elevating operation of the polarizer 70.

A solenoid 50 that forms a magnetic field when a current is applied may be provided. The solenoid 50 may be disposed inside the lower case 30 to be described later. The solenoid 50 may include a bobbin 51 in which a coil (not shown) is wound on the outer circumferential surface. The bobbin 51 is formed with a hollow through which the dehydration 9 passes, and the coil is wound around the outer circumference of the bobbin 51.

The coil may be wrapped with a resin 55 of flame retardant material. The bobbin 51 has a cylindrical bobbin body portion 511 and a top plate portion 512 extending outwardly from the bobbin body portion 511, and a lower plate extending outwardly from the bottom of the bobbin body portion 511. It may include a portion 513.

The contactor 70 is supported by the clutching coupler 40 and is arranged to be lifted along the axial direction, and is raised by the magnetic field formed by the solenoid 50. The contactor 70 serves as a contactor (armature, plunger), and may be formed of a ferromagnetic body.

The contact pole 70 is formed of a tubular (or cylindrical) shape and is fitted to the dehydration shaft 9. The clutching coupler 40 may be interposed between the dehydration 9 and the pole 70. The clutching coupler 40 moves together in a state supported by the pole pole 70. The clutching coupler 40 and the contactor 70 may be coupled to each other. In an embodiment, a screw passes through the first fastening hole 70h formed in the contactor 70 to be engaged with the clutching coupler 40, but is not necessarily limited thereto. For example, the clutching coupler 40 and the contactor 70 may be coupled to a fastening member such as a screw or bolt, or may be coupled to each other in various ways such as bonding, welding, connection, and bonding.

The clutching coupler 40 includes a tubular coupler body 41 having a spline groove 41a formed on its inner circumferential surface, an annular rib 42 protruding from the outer circumferential surface of the coupler body 41, and a bottom surface of the rib 42. It may include a plurality of teeth 43 protruding downward and disposed circumferentially around the coupler body 41. When the clutching coupler 40 is in the connection position, the teeth 41a can engage the engaging grooves 65b3 of the coupling flange 65b.

The lower case 30 may be coupled to the bottom surface of the bearing housing 16. The solenoid 50 may be fixedly disposed in the lower case 30. The lower case 30 has a cylindrical case body 32 surrounding the circumference of the solenoid 50, a ring-shaped case flange 33 extending radially outward from the top of the case body 32, and the case body It may include a ring-shaped case base 34 having an opening extending inward along the radial direction from the bottom of the 32 and having an opening through which the dehydration shaft 9 passes approximately at the center.

The track 9b extends along the circumferential direction on the outer circumferential surface of the dewatering shaft 9. The ball 13 is provided to be movable along the track 9b. The track 9b may be formed of a groove formed in the outer circumferential surface, and the ball 13 may be accommodated in the groove.

A guide groove 100 is formed on the inner circumferential surface of the clutching coupler 40. The guide groove 100 engages with the ball 13 and guides the ball 13 to move along the track 9b in response to the lifting operation of the clutching coupler 40.

The guide groove 100 is a process in which the clutching coupler 40 is raised from the lower guide surface 110 and the lower guide surface 110 in contact with the ball 13 in the course of the lowering of the clutching coupler 40 It includes a rising guide surface 120 in contact with the ball (13).

The downward guide surface 110 and the upward guide surface 120 define the guide groove 100 together with the bottom 130 of the guide groove 100. The position of the ball 13 in the track 9b is changed by the lower guide surface 110 while the clutching coupler 40 is lowering, and to the upward guide surface 120 while the clutching coupler 40 is being raised. Changes by

On the inner circumferential surface of the clutching coupler 40, the spline groove 41a and the guide groove 100 may overlap. That is, in the state where the spline groove 41a is formed on the inner circumferential surface of the clutching coupler 40, the guide groove 100 can be formed deeper than the spline groove 41a thereon, in this case, the spline groove 41a is discontinuous in the section in which the guide groove 100 is formed in the longitudinal direction (or axial direction).

The descending guide surface 110 is made of a concave valley with an open lower side, and when the clutching coupler 40 is in the disengagement position (see Fig. 6), the disengagement maintaining goal 111 in which the ball 13 is located in the goal ) Is formed.

If the ball 13 is located in the disconnection maintaining goal 111 and the solenoid 50 is in an unpowered state, the ball 13 does not deviate from the disconnection maintaining goal 111 and maintains its position. When the clutching coupler 40 is in the disconnected position, an elastic member 29 for pressing the clutching coupler 40 downward may be further provided. Since the restoring force of the elastic member 29 pushes the clutching coupler 40 downward, the descending guide surface 110 and the ball 13 can be surely brought into close contact. In particular, since the ball 13 is in close contact with the inner surface of the disconnecting and maintaining bone 111, the ball 13 can maintain its position without deviating from the disconnecting and maintaining bone 111.

The descending guide surface 110 may include a descending slope section 112 which forms an inclination gradually descending from the connection maintaining goal 111 in the circumferential direction D. Since the dehydration shaft 9 is connected to the washing tank 4, a large load is applied, and when the clutching coupler 40 is lowered, the clutching coupler 40 spline-coupled with the dehydration shaft 9 is substantially In a fixed state, the ball 13 is moved in the circumferential direction D along the track 9b by the descending guide surface 110. That is, the ball 13 is moved in the circumferential direction D along the track 9b, and the position on the guide groove 100 is also changed.

A first stop goal 122 may be formed on the rising guide surface 120 on the side that has progressed in the circumferential direction D more than the lowest point 112b of the descending slope section 112. In the process of the clutching coupler 40 being raised, the ball 13 moving in the circumferential direction D along the guiding surface 120 (or moving relative thereto) reaches the first stop goal 122 and is no longer circumferential. It does not proceed in the direction D and maintains the position within the first stop goal 122, and thereafter, the clutching coupler 40 also no longer rises and maintains its position.

The ascending guide surface 120 gradually descends along the circumferential direction D from the point 123a at the vertically lower side of the connection maintaining goal 111 to the first descending guiding section 123 reaching the first stop goal 122. It can contain.

The descending guide surface 110 may include a first upward guide section 113 that gradually increases in the circumferential direction D from the point 113a vertically above the first stop goal 122. When the clutching coupler 40 is in the connection position at the upper end 113b of the first ascending guide section 113, the connection maintaining goal 114 where the ball 13 is located is formed on the descending guide surface 110. Can. At this time, the connection maintenance goal 114 is disposed at a higher position than the connection maintenance goal 111.

The rising guide surface 120 may include a second descending guide section 125 gradually descending along the circumferential direction D from the point 125a on the vertical side of the connection maintaining goal 114. A second stop goal 124 may be formed at the bottom of the second descending guide section 125.

The descending guide surface 110 may include a second upward guide section 115 that gradually increases in the circumferential direction D from the point 115a on the vertical side of the second stop goal 124.

As described above, the groove structure from the connection-retaining goal 111 to the second ascending guide section 115 may achieve a structure in which a plurality of repeats are repeated along the circumferential direction D. In this case, at the upper end of the second ascending guide section 115, the connection disconnection maintenance of the adjacent groove structure (the bone formed at position P1' in FIG. 5) may be located.

Hereinafter, the operation of the clutching system will be described with reference to FIG. 5.

In the state where the ball 13 is located in the connection maintaining goal 111 (refer to the position P1 in FIG. 1), the clutching coupler 40 is elevated to the connection release position. The clutching coupler 40 is separated from the rotor hub 65, and the elastic member 29 is compressed. In this state, when the motor 6 is operated, only the pulsator 5 is rotated.

Thereafter, when a current is applied to the coil of the solenoid 50 under the control of the control unit 17, the clutching coupler 40 is raised, and the ball 13 is lowered to the position P2 on the guide groove 100. Thereafter, the ball 13 descends along the second descending guide section 125 to reach the position P3 in the first stop goal 122 and stops further.

In this state, when the current applied to the coil of the solenoid 50 is blocked under the control of the control unit 17, the clutching coupler 40 is lowered, and thus the ball 13 reaches the position P4 (hereinafter, The displacement of the ball 13 is relative to the guide groove 100.). Thereafter, the ball 13 is displaced along the first ascending guide section 113 to reach the position P5 in the connection maintaining goal 114. With the ball 13 positioned at P5, the clutching coupler 40 is connected to the rotor hub 65, and when the motor 6 is operated, the pulsator 5 and the washing tank 4 are rotated together.

Thereafter, when a current is applied to the solenoid 50 again under the control of the control unit 17, the clutching coupler 40 is raised, and the ball 13 is lowered to the position P6. The ball 13 is guided down along the second descending guide section 125 to reach the position P7.

Thereafter, when the current applied to the solenoid 50 is cut off, the clutch 13 is lowered while the ball 13 reaches the position P8 corresponding to the point 115a on the vertical upper side of the second stop goal 124 , It is guided along the second ascending guide section 115 and gradually increases in the circumferential direction D to reach the position P1'.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and the present invention belongs to the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical idea or prospect of the present invention.

Claims (8)

A first hollow is formed, and a dehydration track is formed on the outer circumferential surface along the circumferential direction;
A ball movable along the track;
A washing tank connected to the dehydration;
A drive shaft disposed in the first hollow;
A motor for rotating the drive shaft;
A pulsator disposed in the washing tank and rotated by a rotational force transmitted from the driving shaft;
The inner circumferential surface defining the second hollow through which the dehydration shaft passes is spline-coupled with the outer circumferential surface of the dehydration shaft, the shaft is connected to the drive shaft and the dehydration shaft at a connection location, and is separated from the drive shaft at a connection release location elevated from the connection location. Clutching coupler;
A solenoid that forms a magnetic field when a current is applied; And
It is arranged to be lifted together with the clutching coupler along the axial direction, and includes a pole that is raised by the magnetic field,
On the inner peripheral surface of the clutching coupler,
A guide groove is formed in engagement with the ball and guiding the ball to move along the track in response to the lifting operation of the clutching coupler.
The guide groove,
A descending guide surface in contact with the ball in the process of descending the clutching coupler, and a rising guide surface in contact with the ball in the process of raising the clutching coupler under the descending guide surface,
On the descending guide surface,
The washing machine is formed with a concave valley with an open lower side, and when the clutching coupler is in the disengagement position, a disengagement maintenance goal in which the ball is located in the goal is formed. According to claim 1,
The descending guide surface,
And a descending slope section 112 gradually descending in the circumferential direction from the disconnection maintaining goal,
On the upward guide surface,
A washing machine in which a first stop goal is formed on the side which has progressed in the circumferential direction more than the lowest point 112b of the descending slope section. According to claim 2,
The descending guide surface,
A washing machine including a first ascending guide section gradually increasing in the circumferential direction from a point above the vertical stop of the first stop goal. The method of claim 3,
On the descending guide surface,
When the clutching coupler is in the connection position on the upper end of the first ascending guide section, a washing machine in which a connection maintenance goal is located in which the ball is located is formed. According to claim 2,
The upward guide surface,
A washing machine including a first descending guide section gradually descending along the circumferential direction from a point at a vertically lower side of the disconnection maintaining goal to reach the first stop goal. The method of claim 5,
The descending guide surface,
A first ascending guide section gradually increasing and extending along the circumferential direction from a point above the vertical stop of the first stop goal; And
A washing machine which is formed on an upper portion of the first ascending guide section, and includes a connection maintaining valley formed at a higher position than the connection maintaining goal. The method of claim 6,
The upward guide surface,
A second descending guide section 125 gradually descending along the circumferential direction D from the point 125a on the vertical side of the retaining goal; And
A washing machine including a second stop goal (124) formed at the bottom of the second descending guide section (125). According to claim 1,
A washing machine further comprising an elastic member for pressing the clutching coupler downward when the clutching coupler is in the disconnected position.

Images