WO2019059639A1

WO2019059639A1 - Washing machine

Info

Publication number: WO2019059639A1
Application number: PCT/KR2018/011057
Authority: WO
Inventors: 우세영; 표준호; 이정욱; 이태희; 천만호
Original assignee: 엘지전자 주식회사
Priority date: 2017-09-19
Filing date: 2018-09-19
Publication date: 2019-03-28

Abstract

A washing machine of the present invention comprises: an outer tub for containing water; an inner tub disposed in the outer tub for receiving laundry, and rotated around a vertical axis; a motor for providing a rotational force; an inner shaft rotated by the motor and having a first hollow; an outer shaft, into which the inner shaft is inserted to form a second hollow, for rotating the inner tub; an elevating shaft inserted into the first hollow and integrally rotated with the inner shaft, the elevating shaft being allowed to be raised or lowered with respect to the inner shaft; a pulsator disposed in the inner tub and coupled to the elevating shaft; a clutch disposed between the inner shaft and the outer shaft so as to be raised or lowered in a state of being engaged with the outer shaft, wherein the clutch is engaged with the elevating shaft in a screw-fastening manner so as to be raised and lowered between a raised position and a lowered position by rotation of the elevating shaft.

Description

washer

The present invention relates to a washing machine in which a pulsator is lifted.

In general, a washing machine is provided in an outer tank provided in a casing such that an inner tank for receiving laundry is rotatable about a vertical axis, and a pulsator for stirring the water is provided in the inner tank. The inner tub is provided with an opening for entry and exit of the laundry on the upper side.

In such a washing machine, after the washing is completed, the user must draw his / her hand through the opening to take out the laundry. However, as the capacity of the washing machine has recently been increased, the height of the inner tub has been increased, It is possible to take out the laundry at the bottom of the above-mentioned inner tub only by inserting a hand, and a complaint is raised.

In order to solve such complaints, Korean Patent Laid-Open Nos. 10-2016-0015539 and 10-2015-0059197 disclose a structure in which a pulsator provided in an inner tank is lifted and lowered by a lifting shaft Lt; / RTI >

In Korean Patent Laid-Open Publication No. 10-2016-0015539, a driving force of a driving motor is selectively transmitted to a washing blade by a clutch. The clutch includes a coil part provided in the washing shaft, And a connecting member provided.

One or more engaging portions for selectively engaging with the washing blade are formed on an outer circumferential surface of the connecting member so that torque is transmitted from the washing shaft to the washing blade when the engaging portion is engaged with the washing blade.

Here, the connecting member rises when the current is applied to the coil portion to be coupled with the washing blade, and when the current is not applied to the coil portion, the connecting member separates and descends from the washing blade.

Meanwhile, the washing shaft is screwed to the washing blade. When the washing blade is rotated in a direction in which the screw coupling is released, the washing blade is raised. However, in this case, due to the friction between the two threads forming the threaded connection, the coupling can not be smoothly released and the washing shaft and the washing blade are rotated together in the same direction, There has been a problem that this can not be achieved smoothly.

Further, in such a conventional technique, the coil part and the connecting member are essential for interrupting the torque transmitted to the washing blade. Furthermore, the coil part and the connecting member are also necessary for raising the washing blade. However, since the coil portion is disposed in the washing shaft, which is a rotating body, there is a problem that the wiring structure for supplying power is extremely difficult.

In addition, a thread for screw connection with the washing shaft is formed in the washing blade, the length of the thread must be determined corresponding to a height to raise the washing blade, The central portion of the wing is inevitably projected upward. The protruding portion occupies a space in the inner tub, and therefore, there is a problem that the washing capacity must be reduced accordingly.

On the other hand, in Korean Patent Laid-Open No. 10-2015-0059197, there is a predetermined gap between the pulsator and the inner surface of the inner tank in order to prevent the pulsator from rubbing against the inner tank during the rotation process or the lifting process, In this case, there is a problem that laundry is caught in the gap. Particularly, in the state where the dehydration has been completed, the laundry usually adheres to the inner surface of the inner tank, so that when the pulsator is raised in this state, there is a problem that the laundry is easily caught in the interval .

In order to solve such a problem, Korean Patent Laid-Open Publication No. 10-2016-0015539 discloses a structure in which a sealing portion 37 is provided on the outer periphery of a liftable laundry blade 30 '(see Fig. 13 Such a structure has a problem that a noise is generated due to friction between the sealing portion 37 and the inner surface of the drum 22 when the washing blade 30 'is lifted and lowered , The sealing portion 14 made of an elastic material is not only easily deformed by an external force or a high temperature (particularly, in the case of heated laundry) but also abraded when used for a long period of time.

In addition, in the structure of Korean Patent Laid-Open No. 10-2016-0015539, when a protrusion such as a filter mechanism for collecting foreign matter in the water stream is provided on the inner surface of the drum 22, the laundry blade 30 ' There is a problem that the maximum rising height of the washing blade 30 'can not be restricted within a range where such interference does not occur because the sealing portion 37 and the protrusion interfere with each other.

A problem to be solved by the present invention is, first, to provide a washing machine in which the structure for lifting and lowering pulsator is simplified as compared with the prior art.

Second, it is an object of the present invention to provide a washing machine to which a structure for lifting the pulsator is applied without increasing the thickness of the pulsator.

Third, it is an object of the present invention to provide a washing machine which does not require a separate driving part for raising and lowering the pulsator by making use of the power of the motor for rotating the pulsator to lift and lower the pulsator.

Fourthly, there is provided a washing machine in which a clutch for axially connecting or disengaging an inner shaft for rotating the pulsator and an outer shaft for rotating the inner tank is improved, and the clutch realizes the lifting operation of the pulsator.

Fifth, in a washing machine having a pulsator capable of increasing the height, there is a problem in that the problem of the laundry getting caught between the pulsator and the inner surface of the drum is not fundamentally generated in the process of raising the pulsator.

Sixth, even when the projecting portion is provided on the inner surface of the drum, it is not interfered with the projecting portion even if the pulsator rises above the height corresponding to the projecting portion.

A washing machine according to an aspect of the present invention includes an outer tank for storing water and an inner tank disposed in the outer tank for receiving the laundry and rotated around a vertical axis.

A motor for providing a rotational force is provided, and an inner shaft on which the first hollow is formed is rotated by the motor. A second hollow is formed in the outer shaft for rotating the inner tank, and the inner shaft is inserted in the second hollow.

And an elevating shaft inserted into the first hollow and integrally rotated with the inner shaft, wherein the elevating shaft is allowed to move up and down with respect to the inner shaft. And a pulsator coupled with the lifting shaft is disposed in the inner tank.

And a clutch is disposed between the inner shaft and the outer shaft. The clutch is provided so as to be able to move up and down in a state of engagement with the outer shaft, and is engaged with the lift shaft and is raised and lowered between the lift position and the lift position by the rotation of the lift shaft.

The clutch and the outer shaft may be spline coupled so that the clutch can be raised and lowered relative to the outer shaft. At least one key groove may be formed on at least one of the outer circumferential surface of the clutch and the inner circumferential surface of the outer shaft and the other one of the at least one key groove may engage with the at least one key. And when the inner shaft is rotated in the forward direction, the clutch is raised, and when the inner shaft is rotated in the reverse direction, the clutch is lowered, and when the inner shaft is rotating in the square, So that the outer shaft can be rotated in the normal direction.

When the inner shaft is rotated in the forward direction, the clutch is lifted. When the inner shaft is rotated in the reverse direction, the clutch is lowered. When the inner shaft is rotated in the forward direction, when the clutch reaches the down position, , The elevation shaft can be elevated. When the rotational direction of the inner shaft is switched from the reverse direction to the forward direction in a state where the clutch is at the lowered position, the lifting shaft is lowered by the self weight of the pulsator, so that the clutch can maintain the lowered position . The first hollow may be closed at the lower end, and the lowering of the elevating shaft may be performed until the lower end of the elevating shaft reaches the lower closed end of the first hollow.

The elevation shaft and the inner shaft may be spline-coupled so that the elevation shaft can be elevated with respect to the inner shaft.

An upper stopper for restraining the clutch from rising further than the raised position, and a lower stopper for restraining the clutch from lowering further than the lowered position. The outer shaft may include a portion protruding further upward than the inner shaft, the clutch may be disposed on the protruding portion, and the lifting shaft may include a bolt shaft shank having a thread engaged with the clutch of bolt, and a head of bolt formed at the upper end of the bolt shaft, and the upper stopper may be the bolt head.

The lower stopper may be the upper end of the inner shaft.

The lifting axis may include a thread engaging the clutch, and the upper stopper may be the upper end of the thread.

According to another aspect of the present invention, there is provided a washing machine comprising: an outer tub containing water; an inner tub disposed in the outer tub to receive the laundry and rotated around a vertical axis; An outer shaft which is rotated by a motor and has a first hollow formed therein, an outer shaft formed with a second hollow into which the inner shaft is inserted, and a second hollow inserted into the first hollow and integrally rotated with the inner shaft, A pulsator disposed in the inner tank and coupled to the lifting shaft, a clutch screwed to the lifting shaft, and a clutch that is rotated to rotate together with the inner tank when the inner tank is rotated, And an elevation guide for restricting the rotation of the clutch and raising and lowering the clutch when the elevation shaft is rotated.

The inner tub may include an inner tub base forming the bottom of the inner tub and a drum extending upward from the inner tub base. The drum washing machine according to claim 1, wherein the washing machine comprises: a guide plate disposed below the pulsator and lifted and lowered together with the pulsator; an inner diameter portion connected to the guide plate; and an outer diameter portion connected to the inner surface of the drum, Film. &Lt; / RTI > The soft film may be located at an upper position of the outer diameter portion than the inner diameter portion at a position where the guide plate is lowered. The soft film may have a shortest distance from a predetermined point on the inner diameter portion to the outer diameter portion along the surface of the soft film at a position where the guide plate is lowered from a straight line distance from the inner diameter portion to the outer diameter portion.

At a position where the guide plate is raised, a curved surface can be formed between the outer diameter portion and the inner diameter portion by being downwardly biased by its own weight.

The washing machine may further include a filter mechanism fixed to the inner surface of the drum and protruding from the inner surface so as to filter foreign substances in the water in the inner tank and the maximum rising height of the pulsator is at least the height And the outer diameter of the pulsator can be set within a range that does not interfere with the filter mechanism when the pulsator rises to a height corresponding to the filter mechanism.

In a state where the inner tub is stopped, when the pulsator is rotated at a lowered position, the pulsator can be separated from the guide plate.

A plurality of through holes may be formed in the soft film.

The outer diameter of the guide plate may be larger than the outer diameter of the pulsator.

The pulsator can be pushed up by the guide plate.

A groove for receiving the guide plate may be formed in the inner tub base.

According to an embodiment, a ring-shaped soft film may be provided between the pulsator and the drum. In this case, the outer diameter portion of the soft film is fixed to the inner surface of the drum, and the inner diameter portion is joined to the outer peripheral portion of the pulsator.

The coupling between the inner diameter portion of the soft film and the outer peripheral portion of the pulsator allows the pulsator and the soft film to be integrally lifted and allowed to rotate the pulsator relative to the soft film.

A washing machine according to another aspect of the present invention includes an inner tank and a pulsator that is lifted and lowered in the inner tank. The inner tub includes an inner tub base forming the bottom of the inner tub and a drum extending upward from the inner tub base.

A guide plate is disposed on the lower side of the pulsator in the inner tank and is lifted and lowered together with the pulsator. An inner diameter portion of the ring-shaped soft net is connected to the guide plate, and an outer diameter portion is connected to the inner side of the drum.

The soft film may be positioned above the inner diameter portion at a position where the guide plate is lowered. The shortest distance from the predetermined point on the inner diameter portion to the outer diameter portion along the surface of the soft film may be longer than the straight distance from the inner diameter portion to the outer diameter portion at the position where the guide plate is lowered .

The washing machine may further include a filter mechanism fixed to an inner surface of the drum and protruding from the inner surface to filter foreign substances in the water in the inner tank and the maximum rising height of the pulsator corresponds to at least the filter mechanism Lt; / RTI > Here, the outer diameter of the pulsator may be set within a range that does not interfere with the filter mechanism when the pulsator rises to a height corresponding to the filter mechanism.

When the pulsator is rotated at a lowered position in a state where the inner tub is stopped, the pulsator can be separated from the guide plate.

A plurality of through holes may be formed in the soft film.

The pulsator can be pushed up by the guide plate.

The inner tub base may have a groove receiving the guide plate.

Alternatively, the washing machine includes a ring-shaped soft film provided between the pulsator and the drum, the ring-shaped soft film having an outer diameter portion fixed to the inner surface of the drum and an inner diameter portion coupled to the outer circumferential portion of the pulsator.

In the washing machine of the present invention, firstly, since the pulsator rises after the dehydration in the washing machine of the large capacity top load type, the user can easily take laundry out.

Secondly, there is an effect that the clutch structure for axially connecting or disconnecting the inner and outer shafts is simplified compared to the conventional one. Particularly, since the operation of the clutch is performed by a motor that provides power for rotating the pulsator, there is an effect that a separate power source or drive source for operating the clutch is not required.

Third, in the process of raising the pulsator, the pulsating flow can be alternately rotated in both directions to generate the pulsating flow, thereby improving the washing power.

Fourth, even if there is a significant difference between the outer diameter of the pulsator and the inner diameter of the drum, the gap between the pulsator and the drum can be easily shielded by using the soft film. Therefore, it is advantageous to enlarge the capacity of the drum.

Fifth, even if a projection (for example, a filter mechanism) is provided on the inner surface of the drum, the pulsator can be lifted and lowered.

Sixth, when the pulsator is moved up and down, noise generated due to friction between the pulsator and the inner surface of the drum can be fundamentally prevented.

Seventhly, there is an effect that the degree of freedom of designing the size of the pulsator and the size of the drum is improved corresponding to the interval that can be compensated by the connecting membrane.

1 is a longitudinal sectional view of a washing machine according to an embodiment of the present invention.

Fig. 2 is an enlarged view of a portion indicated by a dotted line in Fig. 1, in which (a) is a position of the clutch when only the pulsator is rotated in a state in which the pulsator is lowered, (b) Shows a state in which the clutch is in a lowered position, and (d) shows a state in which the lifting shaft is raised.

Fig. 3 (a) shows the elevation shaft, and Fig. 3 (b) shows the state where the elevation shaft is coupled to the outer shaft.

Fig. 4 is an enlarged view of a portion indicated by a dotted line in Fig.

5 is a longitudinal sectional view of a washing machine according to another embodiment of the present invention.

Figure 6 shows a portion of Figure 5;

7 is a cross-sectional view of Fig.

FIG. 8 is a view schematically showing a washing machine according to another embodiment of the present invention. In particular, FIG. 8 shows a falling state of the pulsator.

Fig. 9 is an enlarged view of the portion I in Fig.

10 shows a state in which the pulsator is elevated.

Fig. 11 shows the inner side of the inner tank viewed from above.

12 shows a washing machine according to another embodiment of the present invention.

Fig. 13 shows a conventional washing machine.

1 is a longitudinal sectional view of a washing machine according to an embodiment of the present invention. Fig. 2 is an enlarged view of a portion indicated by a dotted line in Fig. 1. Fig. 2 (a) shows the position of the clutch when the pulsator is rotated in a lowered state, (D) shows a state in which the lifting shaft is lifted. Fig. 3 (a) shows the elevation shaft, and Fig. 3 (b) shows the state where the elevation shaft is coupled to the outer shaft. Fig. 4 is an enlarged view of a portion indicated by a dotted line in Fig.

1 to 4, a washing machine according to an embodiment of the present invention includes an outer tub 1 in which water is contained, a drum 2 disposed in the outer tub 1 to receive the laundry, A pulsator 3 disposed in the inner tank 2, and a motor 10 for providing a rotational force.

The outer tub 1 is disposed in a casing (not shown) constituting an outer appearance of the laundry processing apparatus. The outer tub 1 can be suspended in the casing by a support rod (not shown). The support rods may be respectively provided at four corners of the casing, and may be connected to the outer tank 1 by suspensions (not shown) that buffer the vibrations of the support rods.

The inner bath 2 may include an inner bath base 21 forming the bottom of the inner bath 2 and a drum 22 extending upward from the inner bath base 21. [ The drum 22 is cylindrical in which the upper and lower sides are opened, and the lower end thereof is engaged with the inner tub base 21. A plurality of through holes may be formed in the drum 22 so that water can be exchanged between the outer tub 1 and the inner tub 2. [

The motor 10 is capable of normal / reverse rotation, and the pulsator 3 and the inner tank 2 are rotated by the motor 10. The motor 10 is preferably a brushless direct current electric motor (BLDC), but it is not necessarily limited thereto.

The motor 10 is an outer rotor type in which a stator (not shown) having an induction coil wound around its center is disposed and the rotor 11 is rotated around the stator. The rotor 11 may include a bottom portion 13 and a ring-shaped side portion 12 extending upward from the bottom portion 13. The lower end of the inner shaft 4 can be connected to the rotor hub 15 fixed to the bottom portion 13 by the rotor bush 14. A plurality of magnets (not shown) are provided along the circumferential direction on the inner peripheral surface of the side surface portion 12 of the motor 10 so that the rotor 11 is rotated by a magnetic field acting between the stator and the magnet.

A first hollow 4h is formed on the inner shaft 4 and an elevation shaft 5 is inserted into the first hollow 4h. The pulsator 3 is engaged with the lifting shaft 5. [ A fastening hole is formed in the center of the pulsator 3, and a screw 23 passing through the fastening hole can be fastened to the lifting shaft 5. [

The outer shaft 9 is connected to the inner tank 2 and has a tubular shape in which a second hollow 9h through which the inner shaft 4 passes is formed. On the lower side of the inner tank 2, a hub base 18 to be coupled with the bottom of the inner tank 2 may be provided. The hub base 18 is rotated together when the outer shaft 9 is rotated. The outer shaft 9 and the hub base 18 may be spline-coupled. On the outer surface of the outer shaft 9, teeth 9a and a key 9a constituting a spline may be formed.

The hub base 18 is formed in a disk shape as a whole, and a boss 18a through which the outer shaft 9 passes may be formed at the central portion. At least one tooth groove 18b engaging with at least one tooth 9a may be formed on the inner circumferential surface of the boss 18a. The torque can be transmitted to the hub base 18 when the outer shaft 9 is rotated by engaging the teeth groove 18b with concavities and convexities such as a tooth or a key formed on the outer circumferential surface of the outer shaft 9. [ The hub base 18 can be engaged with the bottom of the inner tank 2 by fastening members (not shown) such as screws or bolts.

The outer shaft 9 may protrude upward after passing through the boss 18a of the hub base 18 and the protruded portion may be fastened to the nut 19. [ In the embodiment, the outer shaft 9 includes an outer shaft lower end portion 8 and an outer shaft upper end portion 7 joined (shafted) to the outer shaft lower end portion 8, And the outer shaft upper end portion 7 may be integrally formed.

A bearing housing 16 may be disposed under the outer tub 1. The bearing housing 16 can be coupled to the bottom surface of the outer tub 1. In the bearing housing 16, a bearing 16a for supporting the outer shaft 9 may be provided.

The lower end of the inner shaft 4 is engaged with a rotational shaft of the motor 10 so that the inner shaft 4 is constantly rotated when the motor 10 is rotated. The lifting shaft 5 is integrally rotated with the inner shaft 4 (that is, when the inner shaft 4 is rotated, the lifting shaft 5 is always rotated), the lifting and lowering motion with respect to the inner shaft 4 is permitted. The lifting shaft 5 and the inner shaft 4 can be spline-coupled so that the lifting shaft 5 can be raised and lowered with respect to the inner shaft 4. [ At least one key 42 (or a tooth) elongated in the longitudinal direction of the inner shaft 4 may be formed on the inner peripheral surface of the inner shaft 4 for this spline coupling. A plurality of keys 42 (or keys) may be provided.

The elevating shaft 5 may be provided with a keyway 54 into which the key 42 is inserted. When there are a plurality of keys 42, a plurality of key grooves 54 are also provided so that each of the key grooves 54 can be engaged with the key 42.

It is also possible that at least one key 42 is formed in the lifting shaft 5 and at least one corresponding key groove 54 is formed in the inner peripheral surface of the inner shaft 4 Do.

In order for the inner tank 2 to be rotated, the torque provided by the motor 10 must be transmitted to the outer shaft 9, and this function is achieved by the lifting operation of the clutch 6.

The clutch (6) is disposed between the inner shaft (4) and the outer shaft (9). The clutch 6 is provided so as to be able to move up and down with the outer shaft 9 in engagement with the outer shaft 9 and is screwed with the up and down shaft 5, (See Fig. 2 (b)) and the lowering position (see Fig. 2 (c)).

The clutch 6 and the outer shaft 9 can be spline coupled so that the clutch 6 can be lifted and lowered relative to the outer shaft 9. [ At least one tooth 63 constituting a spline is formed on the outer peripheral surface of the clutch 6 and at least one tooth groove 73 engaged with the at least one tooth 63 is formed on the inner peripheral surface of the outer shaft 9 . Preferably, the teeth constituting the spline are triangular in shape and serrations engaging with each other can be formed on the outer peripheral surface of the clutch 6 and the inner peripheral surface of the outer shaft 9, respectively (serration coupling).

When the clutch 6 is in a state in which the clutch 6 is in the raised position and can not rise any more by the engagement of the teeth groove 73 with the concave and convex such as a tooth or a key formed on the tooth surface 63 of the clutch 6 , The torque is transmitted from the clutch 6 to the outer shaft 9. This will be described later in more detail.

A helix thread 53 is formed on the outer peripheral surface of the lifting shaft 5 in the axial direction and a thread 67 engaged with the thread 53 is formed on the inner peripheral surface of the clutch 6 . The thread 53 formed on the lifting shaft 5 is helical as a whole, but is short-circuited at a portion where the keyway 54 is formed.

3, the lifting shaft 5 includes a bolt shaft 52 formed with a thread to be engaged with (or engaged with) the clutch 6, A head 51 may be included. The thread 53 and the keyway 54 may be formed in the bolt shaft 52. The bolt head 51 may be provided with a fastening hole 57 to be fastened to the screw 23 (see Fig. 1) that has passed through the pulsator 3. [

Since the outer peripheral surface of the clutch 6 is spline coupled with the inner peripheral surface of the outer shaft 9 and the lifting shaft 5 and the clutch 6 are screwed to each other, When the shaft 5 is rotated, the lifting shaft 5 in which the load acts largely in the gravity direction is rotated in place, and the clutch 6 is rotated relative to the thread in the rotating direction of the lifting shaft 5 Thereby rising or falling. At this time, in a state where the inner tank 2 is stopped, only the pulsator 3 is rotated.

The lift shaft 5 is rotated in the opposite direction (the rotation direction of the lift shaft 5 when the clutch 6 is caused to descend) in a state in which the clutch 6 is in the lowered position and is restrained so as not to descend any further , Since the clutch 6 can not descend any more, the elevation shaft 5 as an opponent is raised.

In the state in which the clutch 6 is in the lowered position and the lifting shaft 5 is lifted, the lifting shaft 5 is rotated in the forward direction (the rotating direction of the lifting shaft 5 at the time of causing the lifting of the clutch 6) The lifting shaft 5 tends to descend due to the load applied from the pulsator 3 and therefore the clutch 6 can not be lifted by the pressing force of the lifting shaft 5, And the lifting shaft 5 is lowered.

The clutch 6 is lifted and the clutch 6 is brought to the raised position and is no longer able to be lifted. When the lifting shaft 5 is at the maximum, 5 and the clutch 6 are rotated together so that the pulsator 3 and the inner tank 2 are rotated together in the normal direction.

In the embodiment, the elevation shaft 5 is configured to be lowered until the lower end of the elevation shaft 5 touches the bottom of the first hollow 4h. However, the elevation shaft 5 is not limited to this, 5 may be configured to descend until the bolt head 51 of the bolt head 51 contacts the upper end of the outer shaft 9 (in this case, the outer diameter of the bolt head 51 must be larger than the inner diameter of the outer shaft 9) It is also possible to apply a separate stopper so that the descent of the lifting shaft 5 is restricted by interference with the stopper.

On the other hand, an upper stopper that restrains the clutch 6 from rising further than the raised position, and a lower stopper that restrains the clutch 6 from falling further than the lowered position.

For example, the upper stopper may be the bolt head 51 of the lifting shaft 5. When the lift 6 is raised to the bolt head 51 when the lift shaft 5 is rotated in the forward direction with the lift shaft 5 being fully lowered, And the position at this time becomes the rising position.

Alternatively, the upper stopper may be the upper end of the thread 53 formed on the lifting shaft 5. [ The clutch 6 is rotated and raised along the thread 53 and reaches the upper end of the thread 53 so that it can no longer be rotated and thus can not rise any further.

On the other hand, the lower stopper may be the upper end of the inner shaft 4. In this case, the clutch 6 is lowered, but is no longer lowered due to interference with the upper end of the inner shaft 4, and the position of the clutch 6 at this time becomes the lowered position.

Hereinafter, the operation of the clutch 6 will be described with reference to Fig.

2 (a) shows a state in which the pulsator 3 is rotated in a descended state. Only the clutch 6 is lifted and lowered in accordance with the rotating direction of the lifting shaft 5, and the inner tank 2 is in a stopped state. The maximum angle (or the number of revolutions) at which the pulsator 3 can be continuously rotated in the state where the inner tub 2 is stopped is determined according to the maximum angle (or the number of revolutions) at which the clutch 6 can be continuously rotated between the lowered position and the raised position (Or the number of revolutions) can be determined. The pulsator 3 can be rotated in the forward direction or the reverse direction in accordance with the rotation direction of the motor 10 in the section (between L and H) in which the clutch 6 is raised and lowered.

2B shows a state in which the lifting shaft 5 is rotated in the forward direction and the clutch 6 reaches the lifted position in the state as shown in FIG. 2A. The clutch 6 is rotated and raised and is restricted by the upper stopper (in the embodiment, the clutch 6 is interfered with the upper end of the thread 53), the clutch 6 is no longer rotated, The position becomes the rising position. When the lifting shaft 5 is continuously rotated in the forward direction with the clutch 6 in the raised position, the pulsator 3 and the inner tank 2 are rotated together in the forward direction.

2C shows a state in which the rotation of the lifting shaft 5 is reversed and the clutch 6 is lowered to the lowered position in the state as shown in FIG. 2B. While the clutch 6 is descending, only the pulsator 3 is rotated in the reverse direction in the state where the inner tank 2 is stopped.

2 (d) shows a state in which the lifting shaft 5 is continuously lifted by rotating the lifting shaft 5 in the reverse direction in the state as shown in Fig. 2 (c). In a state in which the clutch 6 is in the lowered position, even if the lift shaft 5 is rotated in the reverse direction, the clutch 6 can not descend further, and the win shaft 5, which is the opponent, is raised. The laundry in the inner tank 2 is lifted together with the pulsator 3 because the pulsator 3 is lifted together with the lifting shaft 5. When such a drive is performed after the completion of the laundry process, the user can easily take out the laundry after the completion of the process.

On the other hand, when the lifting shaft 5 is lifted up (at this time, the lower end of the lifting shaft 5 is spaced apart from the bottom of the first hollow 4h) as shown in Fig. 2 (d) When the elevation shaft 5 is rotated in the forward direction by switching the direction of rotation, the elevation shaft 5, which is the opponent, is held at the lowered position without the elevation of the clutch 6 due to the pressing force of the elevation shaft 5. [ . That is, while the lifting shaft 5 is lifted, the inner tank 2 is rotated in the reverse direction while the inner tank 2 is in the stopped state by alternating the rotation direction of the motor 10, It is possible to implement a pulsating motion repeating that

On the other hand, when the lift shaft 5 is rotated in the normal direction with the lift shaft 5 lifted to the maximum, the clutch 6 is held at the lowered position by the force pressing the lift shaft 5, (In this embodiment, the lower end of the lifting shaft 5 interferes with the bottom of the first hollow 4h) until the lifting shaft 5, which is a water, is restricted by the lower stopper, Only the pulsator 3 is rotated in the normal direction. Thereafter, when the lifting shaft 5 can no longer be lowered by the lower stopper, the clutch 6 is lifted from this point to reach the state shown in Fig. 2 (a) again.

5 is a longitudinal sectional view of a washing machine according to another embodiment of the present invention. Figure 6 shows a portion of Figure 5; 7 is a cross-sectional view of Fig.

5 to 7, a washing machine according to another embodiment of the present invention includes an outer tub 1 in which water is contained, a tub 2 disposed in the outer tub 1 to receive the laundry, and a vertical axis An inner shaft 4 which is rotated by the motor 10 and in which a first hollow 4h is formed and an inner shaft 4 which is rotated by the motor 10 and into which the inner shaft 4 is inserted A lifting shaft 5 inserted into the first hollow 4h and integrally rotated with the inner shaft 4 but allowed to move up and down with respect to the inner shaft 4; , And a pulsator (3) disposed in the inner tank (2) and coupled with the lifting shaft (5). A bearing housing 16 may be disposed under the outer tub 1. The bearing housing 16 can be coupled to the bottom surface of the outer tub 1. In the bearing housing 16, a bearing 16a for supporting the outer shaft 9 may be provided. The above structures are substantially the same as those in the above embodiment, and description thereof will be made in the foregoing.

The washing machine according to the present embodiment includes a clutch 160 screwed to the lifting shaft 5 and a lifting shaft 5 that is rotated to rotate together with the inner tank 2 when the inner tank 2 is stopped, And a lift guide 170 for restricting the rotation of the clutch 160 and lifting the clutch 160 when the clutch 160 is rotated.

A hub base 18 may be coupled to the bottom of the inner tank 2. That is, the hub base 18 is rotated together when the outer shaft 9 is rotated. The hub base 18 may be splined to the outer shaft 9. On the outer surface of the outer shaft 9, at least one tooth 9a constituting a spline may be formed. At least one tooth groove 18b engaging with at least one tooth 9a may be formed on the inner circumferential surface of the boss 18a of the hub base 18. These configurations are substantially the same as those in the above-described embodiment.

The elevation guide 170 may be fixed to the hub base 18. Specifically, the elevation guide 170 includes an engaging plate 171 coupled to the upper surface of the hub base 18, at least one guide bar (not shown) extending upward from the engaging plate 171 and engaged with the clutch 160 172).

A rib 18c in the form of wrapping the periphery of the coupling plate 171 can be protruded from the hub base 18. The rib 18c allows the coupling plate 171 to be fixed without being shaken, and the ribs 18c can be formed along the circumference.

The clutch 160 can be raised and lowered along the guide bar 172. The clutch 160 is formed in a ring shape and is screwed to the lifting shaft 5. On the outer circumferential surface of the clutch 160, a lifting guide groove 165 engaging with the guide bar 172 is formed. Preferably, two or more guide bars 172 are provided so that the clutch 160 can be stably lifted and lowered, and the plurality of lift guide grooves 165 are engaged with the guide bars 172, respectively.

An upper stopper and a lower stopper for restricting the upward and downward movement of the clutch 160 may be provided in the same manner as in the above embodiment. When the outer shaft 9 is extended further to the upper side than the inner shaft 4 according to the embodiment, since the clutch 160 is located outside the outer shaft 9, .

The present embodiment is characterized in that the rotation of the clutch 160 in the state where the clutch 160 is guided by the guide bar 172 between the raised position and the lowered position and the inner tank 2 is stopped is transmitted to the guide bar 172, The operation principle of the clutch 160 according to the rotation direction of the motor 10 is substantially the same as that of the above-described embodiment in that it is restrained by the rotation of the motor 10, and a description thereof will be omitted.

Although not shown, in the above embodiments, a water supply section (for example, a water supply valve) for supplying water to the outer tank 1 or the inner tank 2 may be provided, (For example, a drain valve, a drain pump) may be further provided. In the above description, the water level in the inner tank 2 rises by the water supply through the water supply unit, and can be lowered by draining through the water drainage unit.

There is further provided a circulating injection device for circulating water supplied from the outer tank 1 through a predetermined circulation pipe by using a circulation pump (not shown) and then injecting the water into the inner tank 2 through a nozzle .

FIG. 8 is a view schematically showing a washing machine according to another embodiment of the present invention. In particular, FIG. 8 shows a falling state of the pulsator. Fig. 9 is an enlarged view of the portion I in Fig. 10 shows a state in which the pulsator is elevated. Fig. 11 shows the inner side of the inner tank viewed from above. Hereinafter, the same reference numerals are assigned to the same components as those in the above-described embodiment, and the same reference numerals will be given unless otherwise described. The guide plate 50, the soft film 60 and the filter mechanism 70 described below with reference to Figs. 8 to 13 are the same as those of the washing machine 100 according to the embodiments of the present invention described with reference to Figs. 1 to 7, And the like.

Referring to Figs. 8 to 11, the washing machine of the present invention includes an inner tank 2 and a pulsator 30 which is lifted and lowered in the inner tank 2. As shown in Fig. The structure for enabling the pulsator 30 to move up and down is not limited to the same manner as the above-described embodiments, and can be implemented in various ways. For example, in a state in which the inner shaft 4 rotated by the driving unit 10 having the motor is screwed to the pulsator 30, the rotation of the pulsator 30 is stopped by a predetermined stopper And by rotating the inner shaft 4 in the first direction in which the engagement with the pulsator 30 is released, the pulsator 30 can be lifted. Conversely, the descent of the pulsator 30 is stopped in the second direction (the second direction or the second direction) in which the pulsator 30 is screwed with the inner shaft 4 while the pulsator 30 is restrained by the stopper By rotating the pulsator 30 in a direction opposite to the first direction. Furthermore, the pulsator 30 can be raised and lowered by various methods disclosed, not limited to this method.

The pulsator 30 includes a pulsator hub 31 connected to the inner shaft 4, a circular plate 32 extending outward from the pulsator hub 31, and a circular plate 32 projecting from the upper surface of the circular plate 32, And may include a plurality of blades 33 'disposed therein.

The pulsator hub 31 and the inner shaft 4 are threadedly engaged with each other so that the pulsator hub 31 and the inner shaft 4 are threadedly engaged with each other in accordance with the rotation direction of the inner shaft 4, (30) may be raised or lowered, but is not limited thereto.

The inner tank 2 can be arranged rotatably about a vertical axis within the outer tank 1 in which water is contained. The inner bath 2 may include an inner bath base 21 forming the bottom of the inner bath 2 and a drum 22 extending upward from the inner bath base 21. [ The drum 22 is cylindrical in which the upper and lower sides are opened, and the lower end thereof is engaged with the inner tub base 21. A plurality of through holes may be formed in the drum 22 so that water can be exchanged between the outer tub 1 and the inner tub 2. [

The outer shaft 9 is a shaft for rotating the inner tank 2 and is coupled to the inner tank 2. [ The outer shaft 9 may be a hollow shaft having a hollow through which the inner shaft 4 passes. A bearing housing 17 accommodating a bearing for supporting the outer shaft 9 and / or the inner shaft 4 can be coupled to the lower side of the outer tank 1, and the driving unit 10 is fixed to the lower side of the bearing housing 17 .

The driving unit 10 includes a rotor 11 coupled to the inner shaft 4, a plurality of magnets 10b spaced apart from the inner circumferential surface of the rotor 11, and a plurality of magnets 10b fixedly disposed on the lower side of the bearing housing 17, And may include a stator 22 that generates electricity. The rotor 11 is rotated by the magnetic force acting between the stator 22 and the magnet 10b so that the pulsator 30 is rotated.

On the other hand, although not shown, a first clutch may be further provided for selectively connecting or disconnecting the inner shaft 4 and the outer shaft 9. When the inner shaft 4 and the outer shaft 9 are connected by the first clutch, the inner tank 2 and the pulsator 30 are integrally rotated, and when the inner shaft 4 and the outer shaft 9 are disconnected , Only the pulsator 30 is rotated in a state where the inner tub 2 is stopped. Since the first clutch has already been widely used in the field of the washing machine, the detailed description of the structure is omitted.

The guide plate 50 can be disposed in the inner tank 2 on the lower side of the pulsator 30, (Although the guide plate 50 is not shown in Figs. 1 to 7, it is also possible to apply the guide plate 50 to Figs. 1 to 7 as described below with reference to Figs. 8 to 12.)

The outer diameter of the guide plate 50 may be larger than the outer diameter of the pulsator 30, but is not limited thereto. The groove 31a may be formed at the bottom of the inner tank 2 to accommodate the guide plate 50. Although not shown in FIGS. 1 to 7, when the guide plate 50 is applied, Can be formed.)

The pulsator 30 may be disposed outside the groove 31a. However, it is also possible that at least a part of the pulsator 30 is located in the groove 31a.

The guide plate (50) is moved up and down with the pulsator (30). In this case, the coupling between the guide plate 50 and the pulsator 30 is such that when the pulsator 30 is moved up and down, the guide plate 50 is engaged with the pulsator 30, It is preferable that the pulsator 30 can be independently rotated with respect to the guide plate 50. In this case, That is, on the rotating side, the pulsator 30 and the guide plate 50 are separated from each other, so that the guide plate 50 is structured to be in a stopped state even if the pulsator 30 is rotated.

Alternatively, a second clutch may be provided for selectively connecting or disconnecting the pulsator 30 and the guide plate 50. When the pulsator 30 is lifted and lowered with the pulsator 30 and the guide plate 50 connected to each other by the second clutch, the guide plate 50 can also be lifted and lowered together.

Conversely, in a state in which the connection between the pulsator 30 and the guide plate 50 is released by the second clutch, only the pulsator 30 is rotated while the guide plate 50 is stopped. Such rotation of the pulsator 30 alone can be performed at a position where the pulsator 30 is lowered.

On the other hand, according to the embodiment, the rise of the pulsator 30 can be made dependent on the guide plate 50. That is, the guide plate 50 is configured to be raised and lowered by the driving unit 10 or other driving mechanism. When the guide plate 50 is lifted, the pulsator 30 is pushed up by the guide plate 50 . That is, in this case, the guide plate 50 is actively raised by the driving force, and the pulsator 30 is raised depending on the upward movement of the guide plate 50 in a state of being supported by the guide plate 50.

The inner diameter portion 61 forming the inner diameter of the ring is connected to the guide plate 50 and the outer diameter portion 62 forming the outer diameter of the ring is connected to the outer circumference of the drum 22 It is connected to my side. The flexible membrane 60 is made of a flexible material that is elastic or freely deformed in any direction by an external force, and the material thereof may be natural rubber or synthetic resin. Meanwhile, a plurality of through holes 65 may be formed in the soft film 60.

The soft film 60 is located above the inner diameter portion 61 at the position where the guide plate 50 is lowered. 8 to 9, since there is a height difference? H between the outer diameter portion 62 and the inner diameter portion 61, the distance from the lowered inner diameter portion 61 to the distance of at least 2? H (That is, substantially without extending between the outer diameter portion 62 and the inner diameter portion 61). Particularly, as in the embodiment, when the guide plate 50 is at a lowered position and the curved surface of the outer diameter portion 62 and the inner diameter portion 61 is downwardly biased by their own weight, The height between the outer diameter portion 62 and the inner diameter portion 61 can be increased substantially even without increasing the height. 9 shows the structure of such a soft film 60 in more detail. Specifically, at a position where the guide plate 50 is lowered, the soft film 60 is moved from a predetermined point P1 on the inner diameter portion 61 The distance L1 from the inner diameter portion 61 to the outer diameter portion 62 along the surface of the outer diameter portion 62 along the surface of the outer diameter portion 62 Is longer than the straight line distance L2.

10, between the outer diameter portion 62 and the inner diameter portion 61 of the soft film 60, a curved surface can be formed which is downwardly biased by its own weight at a position where the guide plate 50 is lifted. That is, as the inner diameter portion 61 rises, the linear distance between the outer diameter portion 62 and the inner diameter portion 61 is reduced. Thus, unlike the embodiment, the outer diameter portion 62 is moved in the lowered position The soft film 60 is curved downward at a position where the outer diameter portion 62 is raised even when the inner diameter portion 61 and the outer diameter portion 62 are tightened.

Meanwhile, the washing machine according to the above-described embodiments may further include a structure (hereinafter referred to as a protrusion) protruding from the inner surface of the drum 22. For example, the protrusion may be a filter mechanism 70 for filtering foreign substances contained in the water contained in the inner tank 2. The filter mechanism 70 is fixed to the inner surface of the drum 22 and can protrude from the inner surface. For reference, FIG. 8 shows the water flow passing through the filter mechanism 70 by a dotted arrow.

In order to prevent the pulsator 30 from interfering with the protrusions even if the pulsator 30 is raised and reaches a position corresponding to the protrusions in such a manner that the protrusions are present in the inner tank 2, The outer periphery of the guide plate 50 should be determined within a range that does not interfere with the filter mechanism 70 and the outer diameter of the pulsator 30 is also the same. 10, the radius of the pulsator 30 must be smaller than the distance R2 from the rotation axis O to the protrusion 70. In other words, The radius of the pulsator 30 in the embodiment is smaller than the radius R1 of the guide plate 50 but is not limited thereto and may be the same as the radius R1 Or larger.

The present invention is characterized in that when the protrusion 70 is present on the ascending path of the pulsator 30, the outer diameter of the pulsator 30 (or the outer diameter of the guide plate 50) reduced due to the protrusion 70 Even if the interval between the pulsator 30 and the inner surface of the drum 22 (or the interval between the guide plate 50 and the inner surface of the drum 22) is further increased, 60). In particular, it is easy to form the projections in the drum 22 as necessary, since interference with the projections 70 does not hinder the rise of the pulsator 30.

12 shows a washing machine according to another embodiment of the present invention. 12, the ring-shaped soft film 60 is provided between the pulsator 30 and the drum 22 and includes an outer diameter portion 62 fixed to the inner surface of the drum 22, And an inner diameter portion 61 coupled to an outer circumferential portion of the outer circumferential portion.

The coupling between the inner diameter portion 61 of the soft film 60 and the outer peripheral portion of the pulsator 30 is such that the pulsator 30 and the soft film 60 are integrally lifted and lowered, The rotation of pulsator 30 may be allowed.

8 to 11, the washing machine of the present embodiment does not include the guide plate 50, and the inner diameter portion 61 of the soft film 60 is located at the outer peripheral portion of the pulsator 30, There is only a difference that is attached to. Other configurations are substantially the same as those of the above-described embodiment. Therefore, the same configuration as that of the above-described embodiments will be described above, and a description thereof will be omitted.

In particular, it goes without saying that the soft film 60 described with reference to FIG. 12 is also applicable to the other embodiments described above.

Claims

Water-filled outer tub;

An inner tub disposed in the outer tub to receive the laundry, and rotated around a vertical axis;

A motor for providing rotational force;

An inner shaft rotated by the motor and having a first hollow;

An outer shaft for forming a second hollow into which the inner shaft is inserted and rotating the inner tank;

An elevating shaft inserted into the first hollow and integrally rotated with the inner shaft, wherein the elevating shaft is allowed to move up and down with respect to the inner shaft;

A pulsator disposed in the inner tank and coupled to the lifting shaft; And

And a clutch that is disposed between the inner shaft and the outer shaft and is capable of moving up and down in a state of engagement with the outer shaft and is engaged with the up and down shaft and is lifted up and down between the up and down positions by the rotation of the up and down shaft Washing machine.
The method according to claim 1,

Wherein the clutch and the outer shaft are spline coupled so that the clutch can be raised and lowered relative to the outer shaft.
3. The method of claim 2,

Wherein at least one key groove is formed in at least one of the outer circumferential surface of the clutch and the inner circumferential surface of the outer shaft and the other of the at least one key groove is engaged with the at least one key.
The method of claim 3,

When the inner shaft is rotated in the forward direction, the clutch is raised, and when the inner shaft is rotated in the reverse direction, the clutch is lowered,

Wherein when the clutch reaches the raised position while the inner shaft is rotated in the square, the clutch further restrains the upward movement and rotates the outer shaft in the forward direction.
The method of claim 3,

When the inner shaft is rotated in the forward direction, the clutch is raised, and when the inner shaft is rotated in the reverse direction, the clutch is lowered,

Wherein when the clutch rotates in the forward direction, further descent is restricted when the clutch reaches the down position, so that the lifting shaft is lifted.
6. The method of claim 5,

When the rotational direction of the inner shaft is switched from the reverse direction to the forward direction in a state in which the clutch is in the lowered position, the lifting shaft is lowered by the self weight of the pulsator, .
The method according to claim 6,

Wherein the first hollow is closed at the bottom,

The descent of the ascending /

And the lower end of the lifting shaft reaches the lower end of the first hollow.
The method according to claim 1,

Wherein the elevation shaft and the inner shaft are spline coupled so that the elevation shaft can be elevated with respect to the inner shaft.
The method according to claim 1,

An upper stopper for restraining the clutch from rising further than the raised position; And

Further comprising a lower stopper for restraining the clutch from falling further than the lowered position.
10. The method of claim 9,

The outer shaft,

And a portion protruding further upward than the inner shaft,

Wherein the clutch is disposed in the protruding portion,

The lift-

A shank of bolt in which a thread engaging with the clutch is formed; And

And a head of bolt formed at the upper end of the bolt shaft,

The upper stopper

And the bolt head.
10. The method of claim 9,

The lower stopper

And the upper end of the inner shaft.
10. The method of claim 9,

The lift-

And a thread engaged with the clutch,

The upper stopper

And a top end of the thread.
Water-filled outer tub;

An inner tub disposed in the outer tub to receive the laundry, and rotated around a vertical axis;

A motor for providing rotational force;

An inner shaft rotated by the motor and having a first hollow;

An outer shaft having a second hollow into which the inner shaft is inserted;

An elevating shaft inserted into the first hollow and integrally rotated with the inner shaft, wherein the elevating shaft is allowed to move up and down with respect to the inner shaft;

A pulsator disposed in the inner tank and coupled to the lifting shaft; And

A clutch screwed into the lift shaft;

And a lifting and lowering guide configured to rotate together with the inner tub when the inner tub is rotated and to restrain rotation of the clutch when the lifting shaft is rotated while the inner tub is stopped.
14. The method of claim 13,

Further comprising a hub base coupled to the bottom of the inner tank and rotated integrally with the outer shaft,

The elevation guide

A coupling plate coupled to an upper surface of the hub base; And

And a guide bar extending upward from the engaging plate and engaged with the clutch,

The clutch

And is lifted along the guide bar.
The method according to claim 1,

In the inner tank,

An inner tub base forming the bottom of the inner tub; And

And a drum extending upward from the inner tub base,

In the washing machine,

A guide plate disposed under the pulsator in the inner tank and lifted and lowered together with the pulsator; And

And a ring-shaped soft film having an inner diameter portion connected to the guide plate and an outer diameter portion connected to an inner surface of the drum.
16. The method of claim 15,

The soft film,

And the outer diameter portion is located above the inner diameter portion at a position where the guide plate is lowered.
17. The method of claim 16,

The soft film,

Wherein the shortest distance from the predetermined point on the inner diameter portion to the outer diameter portion along the surface of the soft film is longer than the straight line distance from the inner diameter portion to the outer diameter portion at the position where the guide plate is lowered.
17. The method of claim 16,

Wherein the guide plate is in a raised position, and a gap between the outer diameter portion and the inner diameter portion is curved downwardly by its own weight.
16. The method of claim 15,

Further comprising a filter mechanism fixed to the inner surface of the drum and protruding from the inner surface so as to filter foreign substances in the water in the inner tank,

The maximum rising height of the pulsator reaches at least a height corresponding to the filter mechanism,

The outer diameter of the pulsator,

Wherein the filter mechanism is set in a range that does not interfere with the filter mechanism when the pulsator rises to a height corresponding to the filter mechanism.
16. The method of claim 15,

Wherein the pulsator is separated from the guide plate when the pulsator is rotated at a lowered position in a state where the inner tub is stopped.
16. The method of claim 15,

And a plurality of through holes are formed in the soft film.
16. The method of claim 15,

Wherein an outer diameter of the guide plate is larger than an outer diameter of the pulsator.
16. The method of claim 15,

The pearl-

And is pushed up by the guide plate.
16. The method of claim 15,

In the inner tub base,

And a groove for receiving the guide plate is formed.
The method according to claim 1,

In the inner tank,

An inner tub base forming the bottom of the inner tub; And

And a drum extending upward from the inner tub base,

In the washing machine,

And a ring-shaped soft film provided between the pulsator and the drum, the ring-shaped soft film having an outer diameter portion fixed to an inner surface of the drum, and an inner diameter portion coupled to an outer circumferential portion of the pulsator.
26. The method of claim 25,

Wherein the coupling between the inner diameter portion of the soft film and the outer peripheral portion of the pulsator allows the pulsator and the soft film to be integrally lifted and allowed to rotate the pulsator relative to the soft film.
A washing machine comprising an inner tub and a pulsator which is lifted and lowered in the inner tub,

In the inner tank,

An inner tub base forming the bottom of the inner tub; And

And a drum extending upward from the inner tub base,

In the washing machine,

A guide plate disposed under the pulsator in the inner tank and lifted and lowered together with the pulsator; And

And a ring-shaped soft film having an inner diameter portion connected to the guide plate and an outer diameter portion connected to an inner surface of the drum.
28. The method of claim 27,

The soft film,

And the outer diameter portion is located above the inner diameter portion at a position where the guide plate is lowered.
29. The method of claim 28,

The soft film,

Wherein the shortest distance from the predetermined point on the inner diameter portion to the outer diameter portion along the surface of the soft film is longer than the straight line distance from the inner diameter portion to the outer diameter portion at the position where the guide plate is lowered.
28. The method of claim 27,

Wherein the guide plate is in a raised position, and a gap between the outer diameter portion and the inner diameter portion is curved downwardly by its own weight.
28. The method of claim 27,

Further comprising a filter mechanism fixed to the inner surface of the drum and protruding from the inner surface so as to filter foreign substances in the water in the inner tank,

The maximum rising height of the pulsator reaches at least a height corresponding to the filter mechanism,

The outer diameter of the pulsator,

Wherein the filter mechanism is set in a range that does not interfere with the filter mechanism when the pulsator rises to a height corresponding to the filter mechanism.
28. The method of claim 27,

Wherein the pulsator is separated from the guide plate when the pulsator is rotated at a lowered position in a state where the inner tub is stopped.
28. The method of claim 27,

And a plurality of through holes are formed in the soft film.
28. The method of claim 27,

Wherein an outer diameter of the guide plate is larger than an outer diameter of the pulsator.
28. The method of claim 27,

The pearl-

And is pushed up by the guide plate.
28. The method of claim 27,

In the inner tub base,

And a groove for receiving the guide plate is formed.
A washing machine comprising an inner tub and a pulsator which is lifted and lowered in the inner tub,

In the inner tank,

An inner tub base forming the bottom of the inner tub; And

And a drum extending upward from the inner tub base,

In the washing machine,

And a ring-shaped soft film provided between the pulsator and the drum, the ring-shaped soft film having an outer diameter portion fixed to an inner surface of the drum, and an inner diameter portion coupled to an outer circumferential portion of the pulsator.
39. The method of claim 37,

Wherein the coupling between the inner diameter portion of the soft film and the outer peripheral portion of the pulsator allows the pulsator and the soft film to be integrally lifted and allowed to rotate the pulsator relative to the soft film.