WO2020063574A1 - Washing machine - Google Patents

Abstract

Disclosed is a washing machine which can reduce uneven washing and fabric damage and which can improve washing performance. A pulsator comprises: a base portion; a movable blade portion, which protrudes from a configuration surface of the base portion; a movable mechanism portion capable of changing the protruding height of the movable blade portion according to the direction of rotation of the pulsator; a driving motor; and a control portion. The movable mechanism portion comprises: a rotary portion capable of rotating relative to the base portion; and a movable cam causing, following the rotation of the rotary portion, the movable blade portion to move towards a protruding position. The base portion comprises a first blocking rib, and when the movable blade portion moves to the protruding position, the rotary portion comes into contact with the first blocking rib. The control portion performs rotation start rising control on the driving motor, so that the rising interval until a target rotation speed is obtained comprises a first interval and a second interval subsequent to the first interval, and a uniform speed is set in the first interval, the rotary portion comes into contact with the first blocking rib in the first interval, and the rotary portion and the base portion rotate as a whole.

Description

washing machine Technical field

The invention relates to a washing machine.

Background technique

Conventionally, a so-called scroll-type washing machine is provided with a pulsator at the bottom of a washing and dewatering tub so as to be rotatable. The rotation of the pulsator generates a water flow in the washing and dewatering tub, and the laundry is stirred by the water flow. In addition, by contacting the pulsator itself with the laundry, the laundry is stirred or rubbed. In this way, washing is performed in the washing dehydration tub. During washing, the pulsator repeatedly rotates to the right and left.

In the lower part of the washing and dehydrating tub near the pulsator, the laundry is easily exposed to strong water flow, and easily contacts the pulsator. Therefore, when a large amount of laundry is put into the washing and dehydrating tub, the laundry on the lower side is easily washed and the laundry on the upper side is not easily washed.

In the case where the laundry in the dehydration tub is relatively regular or monotonous, the upper laundry and the lower laundry are not easily interchangeable. Therefore, in this case, uneven washing is likely to occur in the laundry, or a large amount of cleaning power is given to the laundry staying on the lower side, thereby causing cloth damage to the laundry.

Therefore, in the existing washing machine, for example, when the pulsator is rotated to the right and left, the operating time of the pulsator is changed or the intensity of the water flow generated by the pulsator is changed, so that the activity of the laundry becomes relatively less Regular or complicated, so that the up and down of the laundry can be easily exchanged.

In addition, Patent Document 1 describes a washing machine in which a surface on one side of a blade of a pulsator facing one rotation direction is set as an upright surface, and a surface facing the other rotation direction is set as an inclined surface. Surface to change the intensity of the water flow generated by the pulsator when rotating in one of the rotation directions and in the other.

As described above, it is desirable to develop a pulsator in a washing machine, which makes the movement of laundry in the dehydration tub more irregular when repeatedly rotating to the right and to the left than the existing pulsator. Or it is complicated, so that it is easy to promote the up-down interchange of the laundry, and it can reduce uneven washing and damage to the cloth.

Prior art literature

Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 2015-146897

Summary of the Invention

Problems to be solved by the invention

Therefore, an object of the present invention is to provide a washing machine with a structure different from the existing pulsator, which can reduce uneven washing and damage to the cloth, and improve the washing performance.

Solution to Problem

A washing machine according to a main aspect of the present invention includes: a washing tub that stores laundry; and a pulsator disposed on a bottom of the washing tub. Wherein, the pulsator includes: a base portion; a blade portion arranged on a disposition surface provided on a surface of the base portion, and a protruding height protruding from the disposition surface is variable; and a variable mechanism portion which can be changed according to the pulsator. The direction of rotation changes the protruding height of the blade portion. The variable mechanism portion includes a rotating portion disposed on a back side of the base portion and capable of rotating relative to the base portion; and a moving portion provided at a position corresponding to the blade portion in the rotating portion, when When the rotating portion is rotated in the first direction, the blade portion is moved from the first position to the second position where the protruding height is higher than the first position in accordance with the rotation. The base portion includes a first abutting portion, the rotating portion is in contact with the first abutting portion when the blade portion is moved to the second position, and when the rotating portion is in contact with the first abutting portion When in contact, the base portion and the rotating portion rotate integrally, and the pulsator rotates in the first direction. The washing machine according to this aspect further includes: a drive motor for rotating the rotating section; and a control section for controlling the drive motor. In addition, when the control unit rotates the pulsator in the first direction so as to increase the rotation of the drive motor to a target rotation speed, the control unit controls the rotation of the drive motor so as to reach the target rotation speed. The ascending interval includes a first interval and a second interval following the first interval, so that the first interval has a constant velocity or acceleration less than the second interval, and in the first interval, the rotating part and the The first abutting portion is in contact.

According to the above configuration, the protruding height of the blade portion can be changed in accordance with the rotation direction of the pulsator. In this way, the laundry is liable to move irregularly or complicatedly in the washing tub, and therefore, it is easy to exchange the laundry up and down. Accordingly, it is expected to reduce uneven washing and damage to the cloth.

In addition, according to the above-mentioned configuration, when the rotating portion is rotated in the first direction by the drive motor, the moving portion is moved to the second position where the protruding height of the blade portion is increased, and further, the rotating portion is in contact with the first abutting portion so that The rotating portion is integrated with the base portion, and the pulsator rotates in a first direction. In this way, switching of the protruding height of the blade portion and rotation of the pulsator in the first direction can be performed with a single driving motor, so that reduction in parts cost and the like can be achieved.

Furthermore, according to the above-mentioned structure, when the pulsator is rotated in the first direction so as to increase the rotation of the drive motor to the target rotation speed, the drive motor is controlled to rotate so that the rising interval to the target rotation speed includes the first interval and the following interval. In the second interval after the first interval, the first interval is made to have a constant speed or acceleration smaller than the second interval, and the rotating portion is in contact with the first abutting portion in the first interval. Thereby, the rotating portion can be brought into contact with the first contact portion at a stage where the rotation speed is low, and the collision noise can be reduced. Moreover, since the acceleration can be increased in the second section, unlike the case of rising with a constant small acceleration, the time to reach the target rotation speed can be shortened as much as possible. Therefore, the amount of rotation of the pulsator during working hours is not easily reduced, and the cleaning effect is not easily reduced.

In the washing machine according to this aspect, when the rotating part rotates in a second direction opposite to the first direction, the moving part moves the blade part from the second position with the rotation. Moving toward the first position, the base portion includes a second abutting portion, the rotating portion contacts the second abutting portion when the blade portion moves to the first position, and when the rotating portion and When the second abutting portion comes into contact, the base portion and the rotating portion rotate integrally, and the pulsator rotates in the second direction. In this case, when the pulsator is rotated in the second direction so as to increase the rotation of the drive motor to the target rotation speed, the control unit performs the rotation increase control on the drive motor, In the first section, the rotating portion is in contact with the second abutting portion.

According to the above-mentioned configuration, switching of the protruding height of the blade portion and rotation of the pulsator in the second direction can be performed with a single driving motor, so that reduction in parts cost and the like can be achieved.

In addition, the rotating portion can be brought into contact with the second abutting portion at a stage where the rotation speed is low, and the collision noise can be reduced. Moreover, since the acceleration can be increased in the second section, unlike the case of rising with a constant small acceleration, the time to reach the target rotation speed can be shortened as much as possible. Therefore, the amount of rotation of the pulsator during working hours is not easily reduced, and the cleaning effect is not easily reduced.

In the case where the above-mentioned structure is adopted, the washing machine may be further provided with a first buffer portion and a second buffer portion, the first buffer portion reducing an impact when the rotating portion contacts the first abutting portion, the The second buffer portion reduces an impact when the rotating portion comes into contact with the second abutting portion.

With such a structure, it is possible to reduce the collision noise when the rotating portion comes into contact with the first contact portion and the second contact portion.

In the washing machine according to this aspect, the moving portion may be provided with an inclined surface, the blade portion may have a contact portion in contact with the inclined surface, and the contact portion may be located at the blade portion from the first position. When moving to the second position, it rises along the inclined surface, and when the blade portion moves from the second position to the first position, it descends along the inclined surface.

According to the above structure, the contact portion of the blade portion rises along the inclined surface of the moving portion as the rotating portion rotates in the first direction, so that the protruding height of the blade portion becomes higher, and the contact portion of the blade portion moves toward the second as the rotating portion The rotation in the direction decreases along the inclined surface of the moving portion, so that the protruding height of the blade portion becomes low.

Invention effect

According to the present invention, a washing machine can be provided, which can reduce uneven washing and damage to the cloth, and can improve the washing performance.

The effects and meanings of the present invention will become clearer through the description of the embodiments shown below. However, the following embodiment is merely an example for implementing the present invention, and the present invention is not limited to the content described in the following embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side sectional view of the fully automatic washer-dryer according to the embodiment.

FIG. 2 is a rear perspective view of the upper part of the fully automatic washer-dryer according to the embodiment.

3 (a) and 3 (b) are perspective views of the pulsator according to the embodiment as viewed from above.

FIG. 4 is an exploded perspective view of the pulsator according to the embodiment as viewed from above.

FIG. 5 is an exploded perspective view of the pulsator according to the embodiment as viewed from below.

FIG. 6 (a) is a perspective view of the movable blade portion viewed from above in the embodiment, and FIG. 6 (b) is a perspective view of the movable blade portion viewed from above in the embodiment. FIG. 6 (c) FIG. 6 (d) is a perspective view of the movable blade portion of the embodiment as viewed from the front and bottom, and FIG.

FIG. 7 (a) is a wave around the first movable blade portion of the pulsator showing a state where the first movable blade portion does not protrude from the placement surface and the second movable blade portion protrudes from the placement surface according to the embodiment. FIG. 7 (b) is a cross-sectional view of the wheel. The first movable blade portion of the pulsator showing a state where the first movable blade portion protrudes from the placement surface and the second movable blade portion does not protrude from the placement surface in the embodiment. Sectional view of the surrounding pulsator.

FIG. 8 is a block diagram showing a configuration of the fully automatic washer-dryer according to the embodiment.

FIG. 9 is a timing chart showing changes in rotation speed when the drive motor is switched on and off according to the embodiment.

FIG. 10 is a flowchart showing energization control when the drive motor is rotated forward and reverse in the embodiment.

(A) and (b) of FIG. 11 are perspective views of the pulsator viewed from above in the first modification.

FIG. 12 is a perspective view of a rotating portion constituting a variable mechanism portion according to Modification 1. FIG.

13 (a) and 13 (b) are cross-sectional views of a pulsator in the periphery of a first movable blade portion according to Modification 2. FIG.

FIG. 14 is a diagram for explaining a rotation-up control of another modification.

Reference sign description

1: Fully automatic washer-dryer (washing machine); 24: Washing dehydration bucket (washing bucket); 26: Wave wheel; 31: Drive motor; 100: Base; 100a: Configuration surface; 116: First barrier rib (first Abutment portion); 117: second barrier rib (second abutment portion); 141: cushioning member (first cushioning portion); 142: cushioning member (second cushioning portion); 200: movable blade portion (blade portion) ); 200A: first movable blade section (blade section); 200B: second movable blade section (blade section); 251: lifting section (contact section); 300: variable mechanism section; 310: rotating section; 317 : Moving cam (moving part); 318: inclined surface; 381: cushioning member (first cushioning section); 382: cushioning member (second cushioning section); 401: control section.

detailed description

Hereinafter, a fully automatic washer-dryer 1 according to an embodiment of a washing machine of the present invention will be described with reference to the drawings.

FIG. 1 is a side sectional view of the fully automatic washer-dryer 1 according to the present embodiment. FIG. 2 is a rear perspective view of the upper portion of the fully automatic washer-dryer 1 according to the present embodiment.

The fully-automatic washer-dryer 1 includes a cabinet 10 constituting an appearance. The cabinet 10 includes a square cylindrical body portion 11 with upper and lower surfaces open; an upper panel 12 covering the upper surface of the body portion 11; and a foot stand 13 supporting the body portion 11. The upper panel 12 is formed with an outer loading port 14 for loading laundry. The outside entrance 14 is covered by a cover 15 which can be opened and closed freely.

In the casing 10, the outer tub 20 is elastically suspended and supported by four suspension rods 21 having a vibration isolation device. The outer tub 20 includes an outer tub main body 22a having an approximately cylindrical shape with an open upper surface, and an outer tub cover 22b that forms an upper surface of the outer tub 20 by covering the upper surface of the outer tub main body 22a. The outer tub cover 22b, which is the upper surface of the outer tub 20, has an inner input port 22c for inputting laundry at a position corresponding to the outer input port 14. The inner inlet 22c is covered with an outer bucket lid 23 so as to be openable and closable.

Inside the outer tub 20, a substantially cylindrical washing and dewatering tub 24 having an open upper surface is arranged. A large number of dewatering holes 24a are formed on the inner peripheral surface of the washing and dewatering tub 24 throughout the entire circumference. A balance ring 25 is provided on the upper part of the washing and dewatering tub 24. A pulsator 26 is disposed on the bottom of the washing and dewatering tub 24. It should be noted that the washing and dehydrating tub 24 corresponds to the washing tub of the present invention.

A drive unit 30 that generates torque for driving the washing and dewatering tub 24 and the pulsator 26 is arranged on the outer bottom of the outer tub 20. The driving unit 30 includes a driving motor 31, a transmission mechanism portion 32, a wing shaft 33, and a dehydration bucket shaft 34. The wing shaft 33 is connected to the pulsator 26, and the dehydration bucket shaft 34 is connected to the washing and dehydration bucket 24. The transmission mechanism portion 32 has a clutch mechanism. By switching the clutch mechanism, the torque of the drive motor 31 is transmitted to the wing shaft 33 and the pulsator 26 is rotated only during the washing process and the rinsing process. The torque of the drive motor 31 is transmitted to the wing shaft 33 and the dehydration tub shaft 34 to rotate the pulsator 26 and the washing and dehydration tub 24 integrally. It should be noted that the transmission mechanism unit 32 has a reduction mechanism, and the rotation of the drive motor 31 is reduced according to the reduction ratio of the reduction mechanism during the washing process and the rinsing process, and is transmitted to the wing shaft 33.

A drain opening portion 20 a is formed on the outer bottom of the outer tub 20. A drain valve 40 is provided in the drain opening portion 20a. The drain valve 40 is connected to a drain hose 41. When the drain valve 40 is opened, the water stored in the washing and dewatering tub 24 and the outer tub 20 is discharged to the outside through the drain hose 41.

A drying device 50 and a water supply device 60 are disposed above the outer tub 20 in the rear portion of the cabinet 10. The drying device 50 and the water supply device 60 are mounted on a fixing plate 16 disposed at the rear of the upper surface of the main body portion 11, and are covered by the upper panel 12.

The drying device 50 dries the laundry stored in the washing and dewatering tub 24. The drying device 50 includes a heater and a circulation air path 50 a provided with a blower fan. The circulation air path 50 a is connected to the inside of the outer tub 20 through an air intake duct 71 and an air exhaust duct 72. The air intake duct 71 and the air exhaust duct 72 are flexible ducts, and include elastic materials such as rubber, and a middle portion has a serpentine portion (not shown). The warm air generated by the operation of the heater and the blower fan is discharged from the circulating air path 50a, and is introduced into the outer tub 20 through the air intake duct 71. Furthermore, the warm air discharged from the outer tub 20 is introduced into the circulation air path 50 a through the exhaust duct 72. In this way, the warm air circulates between the circulation air path 50 a and the outer tub 20.

The drying device 50 performs a circulation drying operation based on the circulation of warm air, and an exhaust air drying operation in which a portion of the circulation warm air is discharged to the outside thereafter. The upper panel 12 is provided with an air exhaust port 51, which is composed of a plurality of exhaust holes and discharges warm air.

A water supply port 61 of the water supply device 60 that is exposed to the outside is connected to an external water supply hose (not shown) extending from a faucet. The water supply device 60 includes a water supply valve and a detergent container. When the water supply valve is opened, the tap water from the faucet is supplied into the outer tub 20 together with the detergent stored in the detergent container. The water supply device 60 may include a bath water pump.

In the full automatic washer-dryer 1, a washing operation, a washing and drying operation, or a drying operation in various operation modes are performed. The washing operation is a washing-only operation, and the washing process, the intermediate dehydration process, the rinsing process, and the final dehydration process are sequentially performed. The washing and drying operation is a continuous washing-to-drying operation, followed by a drying process after the final dehydration process. The drying operation is a drying-only operation, and only a drying process is performed.

During the washing process and the rinsing process, the pulsator 26 rotates leftward and rightward in a state where water is stored in the washing and dehydrating tub 24. The laundry in the washing dehydration tub 24 is washed or rinsed by the action of water flow or the like generated by the rotation of the pulsator 26.

During the intermediate dehydration process and the final dehydration process, the washing and dehydrating tub 24 and the pulsator 26 are integrally rotated at high speed. The laundry is dehydrated by the centrifugal force generated in the washing dehydration tub 24.

During the drying process, the internal air circulation drying process is performed first, and then the external air introduction drying process is performed. During the internal air circulation drying process, the drying device 50 performs a circulation drying operation, so that warm air circulates between the circulation air path 50 a and the outer tub 20. By the circulation of the drying wind, the temperature in the washing and dewatering tub 24 rises rapidly. The pulsator 26 rotates, and the laundry is dried by circulating warm air while being stirred. When the temperature in the washing and dewatering tub 24 continues to rise, and the water evaporates from the laundry, so that a large amount of water is contained in the warm air, the process is switched to an external air introduction drying process. During the external air introduction and drying process, an air-drying operation is performed by the drying device 50, external air is introduced into the circulating air path 50a, and part of the circulating warm air is discharged from the circulating air path 50a. Since the water evaporated from the laundry is effectively discharged from the inside of the outer tub 20 to the outside of the cabinet 10, the inside of the outer tub 20 becomes easy to dehumidify, thereby promoting drying of the laundry.

Next, the configuration of the pulsator 26 will be described in detail.

FIGS. 3A and 3B are perspective views of the pulsator 26 as viewed from above in the present embodiment. FIG. 3 (a) illustrates a state when the pulsator 26 is rotated to the left when viewed from above, and FIG. 3 (b) illustrates a state when the pulsator 26 is rotated to the right when viewed from above.

The pulsator 26 includes a base portion 100, two movable blade portions 200, and a variable mechanism portion 300. The base portion 100 is provided with two fixed blade portions 130, and the movable blade portions 200 are arranged on the arrangement surface 100a which is the top surface of each fixed blade portion 130 so as to be able to change the protruding height protruding from the arrangement surface 100a. The variable mechanism part 300 can change the protruding height of each movable blade part 200 according to the rotation direction of the pulsator 26. In addition, the movable blade part 200 corresponds to the blade part of this invention.

In the present embodiment, as shown in (a) and (b) of FIG. 3, according to the rotation direction of the pulsator 26, the shape of the pulsator 26 is switched such that one movable blade portion 200 protrudes from the arrangement surface 100a, and the other is movable. A configuration in which the blade portion 200 does not protrude from the placement surface 100a, and a configuration in which one movable blade portion 200 does not protrude from the placement surface 100a, and the other movable blade portion 200 protrudes from the placement surface 100a. When the movable blade portion 200 protrudes from the arrangement surface 100a, the protrusion height is a predetermined height H1, for example, a height of about 30 mm. When the movable blade portion 200 does not protrude from the arrangement surface 100a, the protrusion height is approximately 0.

FIG. 4 is an exploded perspective view of the pulsator 26 viewed from above according to the present embodiment. FIG. 5 is an exploded perspective view of the pulsator 26 viewed from below according to the present embodiment.

The base portion 100 includes a resin material such as polypropylene, and includes a main body portion 110 having an approximately disc shape, an attachment portion 120 to which the variable mechanism portion 300 is attached, and two fixed blade portions 130. The attachment portion 120 and the fixed blade portion 130 are integrally formed with the main body portion 110.

A circular concave surface 112 is formed on the surface of the main body portion 110 inside the flat outer peripheral surface 111. The concave surface 112 is formed with a plurality of water discharge holes 113 penetrating the front and back surfaces. When draining water from the washing and dewatering tub 24, that is, the outer tub 20, the water stored in the concave surface 112 is discharged through the drain hole 113.

On the rear surface of the main body portion 110, a plurality of back blades 114 extending radially from the center side to the outer peripheral side are provided at locations other than the attachment portion 120 and the two fixed blade portions 130. Although not shown in FIG. 1, a pump chamber accommodating the back blade 114 is provided at the bottom of the washing and dewatering tub 24, and a circulating water path extending up and down along the inner wall surface of the washing and dewatering tub 24 is connected to the pump chamber. A discharge port is provided at the tip of the circulating water path. By the rotation of the back blade 114, the water in the pump chamber is transported to the circulating water path, and is discharged from the discharge port toward the inside of the washing and dewatering tub 24. Thereby, the circulating water is dripped on the laundry which is located on the upper side in the washing dehydration tub 24. It should be noted that a chip filter may be installed at the discharge port. In this case, the swarf contained in the circulating water is captured by the swarf filter.

The attachment portion 120 bulges upward from the concave surface 112 at the central portion of the main body portion 110. As a result, a substantially circular attachment recess 121 is formed on the back side of the attachment portion 120 and recessed upward. A circular opening portion 122 is formed in a central portion of the top surface of the attaching portion 120, and an annular groove portion 123 is formed around the opening portion 122. An annular sliding rib 124 is formed in the attachment recess 121 at a position on the back side of the groove 123. In addition, on the outer side of the attaching recessed portion 121, a sliding wall portion 115 formed in a circular arc shape concentrically with the attaching recessed portion 121 is provided on the back surface of the main body portion 110.

The two fixed blade portions 130 are provided on the concave surface 112 of the main body portion 110 so as to face each other across the attachment portion 120. In the base portion 100, the orientations of the two fixed blade portions 130 are set to the same orientation. Each of the fixed blade portions 130 has an approximately trapezoidal columnar shape, and is formed to be hollow on the back side. The first side surface 130 a and the second side surface 130 b on the circumferential side of the base portion 100 of each of the fixed blade portions 130 are inclined so that the first side surface 130 a has a greater gradient than the second side surface 130 b.

The top surface of each fixed blade portion 130 is formed as a substantially rectangular flat surface to constitute a placement surface 100 a. The height position of the arrangement surface 100 a is the same as the height position of the outer peripheral surface 111 of the main body portion 110. A substantially rectangular opening portion 131 is formed in the arrangement surface 100 a and occupies almost the entire arrangement surface 100 a. On the four edge portions of the opening portion 131, a fixed-side unevenness group 132 including a plurality of irregularities continuous along the edge portion is provided by a plurality of ribs 132a arranged at predetermined intervals along the edge portion.

A pair of bearing portions 133 having a shaft hole 133 a are provided on the back side of each fixed blade portion 130 near the edge portion on the second side surface 130 b side of the opening portion 131. The shaft hole 133a does not penetrate the bearing portion 133 for the bearing portion 133 on the center side, and the shaft hole 133a penetrates the bearing portion 133 on the bearing portion 133 on the outer peripheral side.

On the back surface of the main body portion 110 at a position slightly spaced from the first side surface 130a of each fixed blade portion 130, a first blocking rib 116 extending from the center side to the outer peripheral side is provided. Further, on the back surface of the main body portion 110 at a position slightly spaced from the second side surface 130 b of each of the fixed blade portions 130, a second blocking rib 117 extending from the center side to the outer peripheral side is provided. The first blocking rib 116 corresponds to a first abutting portion of the present invention, and the second blocking rib 117 corresponds to a second abutting portion of the present invention.

FIG. 6 (a) is a perspective view of the movable blade portion 200 as viewed from above in this embodiment, and FIG. 6 (b) is a perspective view of the movable blade portion 200 as viewed from above in this embodiment. (C) is a perspective view of the movable blade portion 200 as viewed from the front and bottom of this embodiment, and (d) of FIG. 6 is a perspective view of the lifting rod 250 of this embodiment.

The two movable blade portions 200 are formed of a resin material such as polypropylene, and are formed in a substantially triangular prism shape with a hollow back side. Each movable blade portion 200 includes two triangular side surfaces 210, a first inclined surface 220 and a second inclined surface 230 provided between the two side surfaces 210, and the other surface between the two side surfaces 210 is open. The first inclined surface 220 is provided to have a greater gradient than the second inclined surface 230. A pair of shaft fitting portions 240 having shaft holes 241 are provided on the back sides of the two side surfaces 210 of the movable blade portion 200 at corner portions that do not contact the first inclined surface 220. The shaft hole 241 penetrates the shaft mounting portion 240 and the side surface 210.

On both side surfaces 210, a plurality of ribs 211 extending in a direction crossing the direction are formed at predetermined intervals in a direction from the first inclined surface 220 toward the shaft hole 241, thereby providing a movable structure including a plurality of irregularities. The side uneven group 212. A blocking portion 213 is provided at a lower edge portion of each side surface 210 so as to protrude to the side surface. Further, a rib 214 having a shape corresponding to the bearing portion 133 of the fixed blade portion 130 is formed on each side surface 210 so as to surround the shaft hole 241.

The first inclined surface 220 is formed as a curved surface with the shaft hole 241 as a center of curvature. On the first inclined surface 220, a plurality of ribs 221 extending in the oblique direction are formed at predetermined intervals along a direction orthogonal to the oblique direction, so that the first inclined surface 220 is provided with a movable side unevenness including a plurality of unevennesses. Group 222. In addition, on the first inclined surface 220, a plurality of hole portions 223 penetrating the front and back surfaces are formed near the top of the movable blade portion 200. When water is supplied to the washing and dewatering tub 24, when water is stored in the position of the movable blade part 200, the air stored in the back side of the movable blade part 200 is exhausted from the hole part 223. This can prevent the movable blade portion 200 from protruding when it is not desired to protrude due to the buoyancy caused by the air remaining on the back side of the movable blade portion 200.

In the second inclined surface 230, a lower end portion is formed as a curved surface with the shaft hole 241 as a center of curvature, and the other portions are formed as flat surfaces. At the lower end portion of the second inclined surface 230, a plurality of ribs 231 extending in the oblique direction are formed at predetermined intervals in a direction orthogonal to the oblique direction, so that a movable-side uneven group 232 including a plurality of irregularities is provided.

On the back side of the movable blade portion 200, a lift bar 250 is attached to a position directly below the top of the movable blade portion 200 so as to be parallel to the first inclined surface 220. The lifting rod 250 is formed by bending a round rod made of metal, for example, stainless steel, and includes a linearly extending lifting portion 251 and L-shaped insertion portions 252 provided on both sides of the lifting portion 251. The friction coefficient of the lifting rod 250 is smaller than that of the movable blade portion 200. A mounting portion 260 to which the lifting rod 250 is mounted is provided on the back side of the movable blade portion 200. The mounting portion 260 includes two insertion hole portions 261 into which the insertion portion 252 of the lifting rod 250 is inserted, and a support portion 262 that supports the lifting portion 251 between the two insertion hole portions 261. In addition, the raising / lowering part 251 is equivalent to the contact part of this invention.

Returning to FIGS. 4 and 5, when the two movable blade portions 200 are assembled to the base portion 100, the shaft holes 241 of the pair of shaft mounting portions 240 of the movable blade portion 200 and the shafts of the pair of bearing portions 133 of the fixed blade portion 130 are fixed. The holes 133a are aligned, and a shaft 270 made of metal, such as stainless steel, passes through the shaft holes 241, 133a from the outer peripheral side. At this time, by fitting the distal end portion of the bearing portion 133 into the rib 214 of each side surface 210 of the movable blade portion 200 from below, the shaft holes 241 and 133a can be easily aligned with each other, and the shaft 270 can be easily assembled. After the shaft 270 is passed through, the fixing screw 280 is fitted to the shaft hole 133a of the bearing portion 133 on the outer peripheral side, thereby preventing the shaft 270 from being detached. The movable blade part 200 is rotatable about the shaft 270 with respect to the base part 100, and can move between a non-protruding position which does not protrude from the arrangement surface 100a, and a protruded position which protrudes from the arrangement surface 100a. It should be noted that the non-protruding position corresponds to the first position of the present invention, and the protruding position corresponds to the second position of the present invention.

In the rotation range of the movable blade portion 200, the movable- side unevenness groups 212, 222, and 232 of the movable blade portion 200 mesh with the fixed-side unevenness group 132 of the fixed blade portion 130. Accordingly, it is not easy to sandwich foreign objects such as coins or jammed laundry in the gap between the movable blade portion 200 and the opening portion 131 of the fixed blade portion 130.

It should be noted that, in the following description, when the two movable blade portions 200 mounted on the base portion 100 are distinguished and referred to, when the pulsator 26 is rotated to the right when viewed from above, the first inclined surface 220 The movable blade portion 200 facing the rotation direction is referred to as a first movable blade portion 200A, and when the pulsator 26 is rotated leftward as viewed from above, the movable blade portion 200 with the first inclined surface 220 facing the rotation direction is referred to as a first Two movable blade sections 200B. Similarly, in a case where the fixed blade portion 130 is distinguished and referred to, the fixed blade portion 130 in which the first movable blade portion 200A is disposed is referred to as a first fixed blade portion 130A, and the second movable blade is disposed. The fixed blade portion 130 of the portion 200B is referred to as a second fixed blade portion 130B.

The variable mechanism portion 300 includes a rotating portion 310, a bracket 320, a cap portion 330, a lower washer 340, and an upper washer 350. The rotating portion 310, the bracket 320, and the cap portion 330 include a resin material such as polypropylene.

The rotating portion 310 has a structure in which a central hub portion 311 and two arm portions 312 extending in opposite directions from the hub portion 311 are integrally formed. The hub portion 311 is an approximately cylindrical body with a closed top surface, and the back side is circularly recessed to constitute a boss attachment portion 313. A metal mounting boss 360 is attached to the boss attachment portion 313. A wing shaft 33 is mounted on the mounting boss 360. The upper end of the mounting boss 360 penetrates the top surface of the hub portion 311 and protrudes slightly upward. An annular rib 314 having an outer diameter substantially equal to the inner diameter of the opening portion 122 of the attachment portion 120 of the base portion 100 is formed on the top surface of the hub portion 311. Further, a plurality of screw holes 315 are formed on the top surface of the hub portion 311 inside the annular rib 314. An arc-shaped sliding wall portion 316 is formed in the lower portion of the hub portion 311 at a portion where the arm portion 312 is not formed. A metal sliding plate 370 is mounted on the surface of the sliding wall portion 316, for example, stainless steel. The friction coefficient of the slide plate 370 is smaller than that of the rotating portion 310.

The two arm portions 312 are provided with moving cams 317 at positions corresponding to the two movable blade portions 200, respectively. The moving cam 317 is formed with an inclined surface 318 and a flat support surface 319 extending in a horizontal direction from the top of the inclined surface 318. The inclined surfaces 318 of the moving cams 317 of the two arm portions 312 face the same direction. In addition, the moving cam 317 corresponds to the moving part of this invention.

The bracket 320 is formed in an approximately disc shape. A circular recessed portion 321 is formed in a central portion of the bracket 320. The back side of the recessed portion 321 protrudes downward. An opening portion 322 is formed in a central portion of the bottom surface of the recessed portion 321 to which a distal end portion of the mounting boss 360 is inserted, and a plurality of screw holes 323 are formed around the opening portion 322. In addition, an annular sliding rib 324 is formed on an outer peripheral portion of the back surface of the bracket 320.

The cap portion 330 is formed in an approximately disc shape and has an outer diameter substantially equal to the inner diameter of the recessed portion 321 of the holder 320. The lower washer 340 and the upper washer 350 are annular plates made of metal. The friction coefficient of the lower washer 340 is smaller than that of the rotating portion 310, and the friction coefficient of the upper washer 350 is smaller than that of the bracket 320.

When assembling the variable mechanism part 300 to the base part 100, first, the rotation part 310 is attached to the back side of the base part 100 from below. The hub portion 311 is inserted into the attachment recessed portion 121, and a lower washer 340 is sandwiched between the top surface of the hub portion 311 and the upper surface of the attachment recessed portion 121. The sliding rib 124 on the upper surface of the attaching recess 121 is in contact with the lower washer 340. Further, an annular rib 314 on the top surface of the hub portion 311 is fitted into the opening portion 122 of the attachment portion 120. The top surface of the hub portion 311 located inside the annular rib 314 faces upward through the opening portion 122. Next, the bracket 320 is attached to the top surface of the hub portion 311 located inside the annular rib 314 from above. At this time, the back surface of the recessed portion 321 of the bracket 320 is in contact with the top surface of the hub portion 311, and the screw holes 323 and 315 are aligned with each other. Screws (not shown) are fixed to the two screw holes 323 and 315, and the bracket 320 is fixed to the hub portion 311. An upper washer 350 is interposed between the bracket 320 and the groove portion 123 on the top surface of the attachment portion 120. The sliding rib 324 on the back surface of the bracket 320 is in contact with the upper washer 350. Finally, the cap portion 330 is assembled to the recessed portion 321 of the bracket 320, and the recessed portion 321 is covered by the cap portion 330.

The rotating portion 310 can rotate with respect to the base portion 100 around the central axis of the base portion 100 within a range that does not contact the two barrier ribs 116 provided on the back surface of the base portion 100. When the rotating part 310 rotates relative to the base part 100, on the back side of the base part 100, the sliding plate 370 of the sliding wall part 316 of the hub part 311 slides on the inner surface of the sliding wall part 115 of the base part 100 and attaches the recessed part 121 The upper surface of the sliding rib 124 slides on the surface of the lower washer 340. In addition, on the surface side of the base portion 100, the sliding rib 324 on the rear surface of the bracket 320 slides on the surface of the upper washer 350. Thereby, the rotation part 310 rotates smoothly with respect to the base part 100.

Next, an operation of changing the protruding height of the movable blade portion 200 with respect to the top surface of the fixed blade portion 130, that is, the placement surface 100 a by the variable mechanism portion 300 will be described. Here, the operation of changing the protruding height of the first movable blade portion 200A will be described, and the operation of changing the second movable blade portion 200B is the same as the operation of changing the first movable blade portion 200A.

FIG. 7A is a first movable pulsator 26 showing a state where the first movable blade portion 200A does not protrude from the placement surface 100a and the second movable blade portion 200B protrudes from the placement surface 100a according to the present embodiment. 7B is a cross-sectional view of the pulsator 26 around the blade portion 200A. FIG. 7 (b) shows that the first movable blade portion 200A of the present embodiment projects from the arrangement surface 100a and the second movable blade portion 200B does not project from the arrangement surface 100a A cross-sectional view of the pulsator 26 in the state of the pulsator 26 in the vicinity of the first movable blade portion 200A.

As shown in FIG. 7 (a), when the first movable blade portion 200A is located at a non-protruding position that does not protrude from the arrangement surface 100a, the first movable blade portion 200A includes the lifting portion 251 of the lifting rod 250 at the moving cam. The position below the inclined surface 318 of 317 is in contact with the moving cam 317. In the pulsator 26, the wing shaft 33 is connected to the rotating portion 310 of the variable mechanism portion 300 and is not connected to the base portion 100. Therefore, when the drive motor 31 rotates forward from this state, the torque of the drive motor 31 is transmitted to the rotating portion 310 via the wing shaft 33. When viewed from above, the rotating portion 310 rotates in the right direction. The rotating portion 310 rotates in a right direction relative to the base portion 100. As shown by a solid arrow, the arm portion 312 of the rotating portion 310 moves in a direction toward the first blocking rib 116. Although the first movable blade portion 200A is pushed toward the moving cam 317 by the movement of the arm portion 312, the base portion 100 is not easily rotated due to the resistance of the water in the washing and dewatering tub 24, and so is shown by the dotted arrow. The lifting portion 251 rises along the inclined surface 318, and as a result, the first movable blade portion 200A rotates upward with the axis 270 as the center. As shown by a one-dot chain line, the first movable blade portion 200A protrudes from the arrangement surface 100a. Here, the lifting portion 251 includes a member having a smaller friction coefficient than the movable blade portion 200. Therefore, the lifting portion 251 is easily lifted and lowered smoothly along the inclined surface 318, and the movable blade portion 200 is easily turned smoothly.

As shown in FIG. 7 (b), when the arm portion 312 comes into contact with the first blocking rib 116, the lifting portion 251 reaches the support surface 319 of the moving cam 317. As a result, the first movable blade portion 200A reaches the protruding position and is in a state of being most protruded with respect to the arrangement surface 100a. In this state, the blocking portion 213 of the first movable blade portion 200A comes into contact with the back side of the arrangement surface 100a, and the first movable blade portion 200A does not further rotate upward. The lifting portion 251 is supported by the support surface 319 in an upward direction, that is, in a protruding direction. Thereby, even if it pushes downward, the 1st movable blade part 200A can be prevented from retreating to the arrangement surface 100a side. After the arm portion 312 abuts against the first blocking rib 116, the base portion 100 and the rotating portion 310 are integrated and rotate in the right direction. That is, the pulsator 26 rotates in the right direction. On the second movable blade portion 200B side, the lifting portion 251 has completely slid down the inclined surface 318 and the second movable blade portion 200B does not protrude from the arrangement surface 100a. At this time, the arm portion 312 on the second movable blade portion 200B side is in contact with the second blocking rib 117.

Next, as shown in FIG. 7 (b), in a state where the first movable blade portion 200A is in the protruding position, when the drive motor 31 is reversed, the rotating portion 310 is rotated in the left direction when viewed from above. The rotating portion 310 rotates in a left direction relative to the base portion 100, and as shown by a solid line arrow, the arm portion 312 moves in a direction toward the second blocking rib 117. As shown by the dotted arrow, the lifting portion 251 descends along the inclined surface 318, and the first movable blade portion 200A rotates downward as shown by the one-dot chain line. The first movable blade portion 200A is pushed toward the arrangement surface 100a. . As shown in FIG. 7 (a), when the lifting portion 251 completely slides down the inclined surface 318, the first movable blade portion 200A does not protrude from the arrangement surface 100 a. At this time, the second inclined surface 230 of the first movable blade portion 200A is substantially the same as the arrangement surface 100a.

The arm portion 312 is in contact with the second blocking rib 116, so that the base portion 100 and the rotating portion 310 are integrated and rotated in the left direction. That is, the pulsator 26 rotates in the left direction. On the second movable blade portion 200B side, the lifting portion 251 rises along the inclined surface 318, and the second movable blade portion 200B projects from the arrangement surface 100a. At this time, the arm portion 312 on the second movable blade portion 200B side is in contact with the second blocking rib 117.

It should be noted that when the first movable blade portion 200A corresponds to the blade portion of the present invention, the right direction corresponds to the first direction of the present invention, and the left direction corresponds to the second direction of the present invention. On the other hand, when the second movable blade portion 200B corresponds to the blade portion of the present invention, the left direction corresponds to the first direction of the present invention, and the right direction corresponds to the second direction of the present invention.

Then, when the pulsator 26 alternately rotates in the left and right directions, the first movable blade portion 200A as shown in FIG. 3 (a) does not protrude from the arrangement surface 100a and the second movable blade portion 200B is alternately repeated from the arrangement surface. The form in which 100a protrudes is the form in which the first movable blade portion 200A protrudes from the placement surface 100a and the second movable blade portion 200B does not protrude from the placement surface 100a as shown in FIG. 3 (b). By switching the rotation direction of the pulsator 26, one movable blade portion 200 is retracted to the side of the arrangement surface 100a and the protruding height is lowered, that is, 0 in this embodiment. When the other movable blade portion 200 is from the arrangement surface 100a When the protrusion height increases, the laundry sinks on the side of one movable blade part 200, and the laundry lifts on the side of the other movable blade part 200. In this state, when the laundry is stirred by the other movable blade part 200, the lifted laundry easily falls on the sunken laundry. By generating such an activity, in the washing and dewatering tub 24, the laundry does not move regularly or monotonously in the left and right directions as the pulsator 26 rotates in the left and right directions, and it is easy to move irregularly or complicatedly. Thereby, the up-down exchange of a laundry becomes easy. Accordingly, it is expected to reduce uneven washing and damage to the cloth.

FIG. 8 is a block diagram showing a configuration of the fully automatic washer-dryer 1 according to the present embodiment.

In addition to the above-mentioned structure, the fully-automatic washer-dryer 1 includes a control unit 400. The control unit 400 includes a control section 401, a storage section 402, a motor drive section 403, a clutch drive section 404, a water supply drive section 405, a drainage drive section 406, a fan drive section 407, and a heater drive section 408.

The motor driving section 403 drives the driving motor 31 based on a control signal from the control section 401. The motor driving unit 403 includes a rotation speed sensor (not shown) that detects the rotation speed of the drive motor 31, and outputs a drive current corresponding to the rotation speed detected by the rotation speed sensor to the drive motor 31. As the rotation speed control of the drive motor 31, for example, PWM (Pulse Width Modulation) control can be used.

The clutch driving section 404 drives the clutch mechanism 32 a of the transmission mechanism section 32 based on a control signal output from the control section 401. The water supply driving unit 405 drives the water supply valve 62 of the water supply device 60 based on a control signal from the control unit 401. The drainage driving unit 406 drives the drainage valve 40 based on a control signal from the control unit 401.

The fan driving unit 407 drives the blower fan 52 of the drying device 50 according to a control signal output from the control unit 401. The heater driving unit 408 drives the heater 53 of the drying device 50 based on a control signal output from the control unit 401.

The storage section 402 includes EEPROM, RAM, and the like. The storage unit 402 stores programs for performing a washing operation, a washing and drying operation, and a drying operation in various operation modes. The storage unit 402 stores various parameters and various control flags for executing these programs.

The control unit 401 controls the motor drive unit 403, the clutch drive unit 404, the water supply drive unit 405, the drainage drive unit 406, the fan drive unit 407, the heater drive unit 408, and the like based on a program stored in the storage unit 402.

As described above, during the washing process or the rinsing process, the pulsator 26 rotates alternately in the left and right directions. At this time, on-off control of the drive motor 31 controlled by the control unit 401 is performed, and when turned on (energized), the rotation of the drive motor 31 rises to a preset target rotation speed. In the middle of the rotation rising to the target rotation speed, the rotating portion 310 comes into contact with the first blocking rib 116 and the second blocking rib 117 of the base portion 100, and the rotating portion 310 and the base portion 100 rotate integrally. Therefore, when the acceleration is increased to reach the target rotation speed, the rotating portion 310 easily contacts the barrier ribs 116 and 117 at a high rotation speed, and therefore, a large collision sound is easily generated. On the other hand, if the acceleration to reach the target rotation speed is reduced in order to make the rotating part 310 easily contact the blocking ribs 116 and 117 at a low rotation speed to reduce the impact noise, the time to reach the target rotation speed becomes longer. The amount of rotation of the pulsator 26 within a predetermined on-time is reduced, and the cleaning effect is easily reduced.

Therefore, in the present embodiment, the drive motor 31 performs on-off control so as to suppress an increase in the time to reach the target rotation speed and reduce the collision noise.

FIG. 9 is a timing chart showing changes in the rotation speed when the drive motor 31 is switched on and off according to the present embodiment. FIG. 10 is a flowchart showing energization control when the drive motor 31 is rotated in the forward and reverse directions according to the present embodiment.

The on / off control of the drive motor 31 controlled by the control unit 401 will be described with reference to FIGS. 9 and 10.

The control unit 401 first energizes the drive motor 31 and rotates the drive motor 31 forward. At this time, the control unit 401 performs the energization control of the drive motor 31 in FIG. 10. That is, the control unit 401 sets the intermediate rotation speed R0 that is smaller than the target rotation speed R1, for example, the size is half or less, and increases the rotation of the drive motor 31 to the intermediate rotation speed R0 (S1). When the rotation of the drive motor 31 rises to the intermediate rotation speed R0 (S2: YES), the control unit 401 maintains the rotation speed of the drive motor 31 at the intermediate rotation speed R0 (S3). The control unit 401 measures the retention time T0 at which the rotation speed of the drive motor 31 is kept at the intermediate rotation speed R0 from the start of the energization.

The retention time T0 is set to a time period longer than the period from the start of the energization of the drive motor 31, that is, the rotation portion 310, until the rotation portion 310 contacts the barrier ribs 116, 117. The angle at which the rotating portion 310 rotates with respect to the base portion 100 before the rotating portion 310 contacts the blocking ribs 116 and 117 is constant. However, before the rotating portion 310 is relatively rotated at this angle, the angle at which the base portion 100 rotates varies depending on the resistance that the base portion 100 receives from the laundry and water. Therefore, correspondingly, the contact angle between the base portion 100 and the barrier ribs 116 and 117 is different. The absolute angle of the previous rotation of the rotating portion 310 may also vary. Therefore, the time until the rotating portion 310 contacts the barrier ribs 116 and 117 varies. Therefore, in consideration of the deviation of this time, the retention time T0 is determined in advance through experiments and the like.

While the drive motor 31 maintains the intermediate rotation speed R0, as described in (a) and (b) of FIG. 7, the first movable blade portion 200A moves to the protruding position, and the second movable blade portion 200B moves to the non-protruding position. The rotating portion 310 is in contact with the first blocking rib 116 on the first movable blade portion 200A side and the second blocking rib 117 on the second movable blade portion 200B side. In this way, since the rotating portion 310 is in contact with the barrier ribs 116 and 117 in a state where the rotation speed of the driving motor 31, that is, the rotating portion 310 is small, the collision noise is reduced.

When the retention time T0 has elapsed (S4: YES), the control unit 401 sets the target rotation speed R1 instead of the intermediate rotation speed R0 to increase the rotation of the drive motor 31 toward the target rotation speed R1 (S5). The acceleration at this time is increased as much as possible, and at least larger than the average acceleration until the retention time T0 elapsed as shown by the one-dot chain line in FIG. 9.

When the rotation of the drive motor 31 rises to the target rotation speed R1 (S6: YES), the control unit 401 maintains the rotation speed of the drive motor 31 at the target rotation speed R1 (S7). Then, when the on-time T1 has elapsed from the start of the energization (S8: Yes), the control unit 401 stops energizing the drive motor 31 (S9). Thereby, the rotation of the drive motor 31 is stopped.

The control unit 401 stops the drive motor 31 for the off time T2 (see FIG. 9). The off time T2 is set to a time shorter than the on time T1. When the off time T2 has elapsed, the control unit 401 applies power to the drive motor 31 to reverse the drive motor 31. During the reverse rotation, the control unit 401 also performs the energization control of the drive motor 31 in FIG. 10. When the drive motor 31 rises to the target rotation speed R1, while the drive motor 31 maintains the intermediate rotation speed R0, as described in (a) and (b) of FIG. 7, the first movable blade portion 200A moves to the non-protruding position. And the second movable blade portion 200B moves to the protruding position, and the rotating portion 310 is in contact with the first blocking rib 116 on the second movable blade portion 200B side and the second blocking rib 117 on the first movable blade portion 200A side. In this way, the rotating portion 310 comes into contact with the barrier ribs 116 and 117 in a state where the rotation speed of the driving motor 31, that is, the rotating portion 310 is small, so that the collision noise is reduced.

Until the running time of the washing process or the rinsing process elapses, such forward rotation and reverse rotation of the drive motor 31 are repeated.

It should be noted that a series of processes from S1 to S6 in the energization control in FIG. 10 correspond to the rotation rising control of the present invention. In addition, a section maintained at the intermediate rotation speed R0 shown in FIG. 9 corresponds to the first section of the invention, and a section accelerated from the intermediate rotation speed R0 shown in FIG. 9 to the target rotation speed R1 corresponds to the second section of the invention.

<Effect of Embodiment>

As the pulsator 26 rotates leftward and rightward, the configuration in which the first movable blade portion 200A does not protrude from the placement surface 100a and the second movable blade portion 200B protrudes from the placement surface 100a and the first movable blade portion 200A from the placement surface are repeated. A configuration in which 100a protrudes and the second movable blade portion 200B does not protrude from the arrangement surface 100a. This makes it easy for the laundry to move irregularly or complicatedly in the washing and dewatering tub 24, and thus it is easy to interchange the laundry up and down. Accordingly, it is expected to reduce uneven washing and damage to the cloth.

In addition, when the rotating portion 310 is rotated to the right by the drive motor 31, the first movable blade portion 200A is moved to the protruding position by each of the moving cams 317 and the second movable blade portion 200B is moved to the non-protruding position, and further, The rotating portion 310 is in contact with the first blocking rib 116 on the first movable blade portion 200A side and the second blocking rib 117 on the second movable blade portion 200B side so that the rotating portion 310 is integrated with the base portion 100, and the pulsator 26 is directed to the right Spin. On the other hand, when the rotating portion 310 is rotated in the left direction by the drive motor 31, the first movable blade portion 200A is moved to the non-protruding position by the respective moving cams 317 and the second movable blade portion 200B is moved to the protruding position. Further, the rotating portion 310 is in contact with the first blocking rib 116 on the second movable blade portion 200B side and the second blocking rib 117 on the first movable blade portion 200A side so that the rotating portion 310 is integrated with the base portion 100, and the pulsator 26 is directed toward Rotate left. In this way, since the height of the movable vane portion 200 and the rotation of the pulsator 26 can be switched by a single driving motor 31, the cost of components and the like can be reduced.

Further, it is arranged that a section maintained at an intermediate rotation number R0, that is, a constant speed section is provided midway between a section for increasing the rotation of the drive motor 31 to the target rotation speed R1, and in this section, the rotating part 310, the first barrier rib 116, and the first section The two barrier ribs 117 are in contact. Accordingly, the rotating portion 310 can be brought into contact with the barrier ribs 116 and 117 at a stage where the rotation speed is low, and the collision noise can be reduced. In addition, since the acceleration can be increased before and after the uniform speed section, unlike the case of rising with a constant small acceleration, the time to reach the target speed R1 can be shortened as much as possible. Therefore, the amount of rotation of the pulsator 26 during the on time T1 is not easily reduced, and the cleaning effect is not easily reduced.

As mentioned above, although embodiment of this invention was described, this invention is not limited at all by the said embodiment etc. Moreover, the embodiment of this invention can also be variously changed other than the above.

＜ Modification 1 ＞

The pulsator 26A of this modification can be used instead of the pulsator 26 of the above embodiment.

(A) and (b) of FIG. 11 are perspective views of the pulsator 26A as viewed from above in the first modification. (A) of FIG. 11 shows the state when the pulsator 26A is rotated to the left when viewed from above, and (b) of FIG. 11 shows the state when the pulsator 26A is rotated to the right when viewed from above. FIG. 12 is a perspective view of a rotating portion 310 constituting the variable mechanism portion 300 according to the first modification.

In the pulsator 26A of this modification, as shown in (a) and (b) of FIG. 11, the first movable vane portion 200A and the first fixed vane portion 130A are oriented in the same direction as in the first embodiment. The moving blade portion 200A and the first fixed blade portion 130A face in opposite directions. In addition, as shown in FIG. 12, in the rotating portion 310 constituting the variable mechanism portion 300, the orientation of the arm portion 312 corresponding to the first movable blade portion 200A is the same as that of the first movable blade in the case of the above embodiment. The orientation of the arm portion 312 corresponding to the portion 200A is reversed, so that the orientation of the moving cam 317 corresponding to the first movable blade portion 200A is the same as that of the moving cam 317 corresponding to the first movable blade portion 200A in the above-described embodiment. The opposite direction. Although not shown, in the base portion 100, the positions of the first barrier rib 116 and the second barrier rib 117 are reversed on the first movable blade portion 200A side. Therefore, in this modification, unlike the above-mentioned embodiment, when the first movable blade portion 200A rotates leftward in the pulsator 26A, the first movable blade portion 200A protrudes from the arrangement surface 100a that is the top surface of the first fixed blade portion 130A, and When the pulsator 26A is rotated in the right direction, it does not protrude from the arrangement surface 100a.

Therefore, in this modification, when the pulsator 26A alternately rotates in the left and right directions, both the first movable blade portion 200A and the second movable blade portion 200B as shown in FIG. 11 (a) are alternately repeated from the arrangement surface. The form in which 100a protrudes is the form in which both the first movable blade portion 200A and the second movable blade portion 200B do not protrude from the arrangement surface 100a as shown in FIG. 11 (b).

When the two movable blade portions 200 protrude from the arrangement surface 100 a, the water in the washing and dehydrating tub 24 is stirred by the two fixed blade portions 130 and the movable blade portion 200. On the other hand, when the two movable blade portions 200 do not protrude from the arrangement surface 100a, the water in the washing and dewatering tub 24 is stirred only by the two fixed blade portions 130. Therefore, when the two movable blade portions 200 do not protrude from the arrangement surface 100a, the water flow generated in the washing and dewatering tub 24 is extremely weak compared to the case where the two movable blade portions 200 protrude from the arrangement surface 100a. Therefore, when the pulsator 26A is rotated in the left and right directions, the intensity of the water flow in the washing and dehydrating tub 24 is greatly different. Therefore, the laundry does not move regularly or monotonously in the left-right direction as the pulsator 26A rotates in the left-right direction, and it is easy to move irregularly or complicatedly, so it is easy to exchange the laundry up and down.

Therefore, it is possible to reduce uneven washing and damage to the cloth in the same manner as in the present embodiment described above.

In addition, in this modification, when the two movable blade portions 200 do not protrude from the arrangement surface 100a, the load applied to the pulsator 26A due to contact with water and laundry is small. Thereby, the pulsator 26A becomes easy to rotate, and the pumping effect by the back blade 114 becomes large, so the amount of circulating water between the circulating water path and the washing and dewatering tub 24 becomes large. Therefore, when the pulsator 26A is rotated leftward and rightward, the total amount of circulating water can be increased, and the laundry in the washing and dewatering tub 24 can be sufficiently wetted with the circulating water.

In this modification, as in the above-described embodiment, the control unit 401 performs ON / OFF control of the drive motor 31 described in FIGS. 9 and 10. At this time, when the drive motor 31 rotates forward, that is, rotates in the right direction and rises to the target rotation speed R1, while the drive motor 31 maintains the intermediate rotation speed R0, the first movable blade portion 200A and the second movable blade portion 200B move to In the non-protruding position, the rotating portion 310 is in contact with the two second blocking ribs 117. In addition, when the drive motor 31 rotates in the reverse direction, that is, rotates to the left and rises to the target rotation speed R1, while the drive motor 31 maintains the intermediate rotation speed R0, the first movable blade portion 200A and the second movable blade portion 200B move to protrude In the position, the rotating portion 310 is in contact with the two first blocking ribs 116. The rotating part 310 is in contact with the barrier ribs 116 and 117 in a state where the rotational speed of the driving motor 31, that is, the rotating part 310 is small, so that the collision noise is reduced.

In this modification, the left direction corresponds to the first direction of the present invention, and the right direction corresponds to the second direction of the present invention.

It should be noted that, in this modification, when the rotating portion 310 rotates to the right with respect to the base portion 100, the elevation portions 251 of both the first movable blade portion 200A and the second movable blade portion 200B are inclined along the moving cam 317. Surface 318 drops. Therefore, when the driving motor 31 rotating in the reverse direction, that is, rotating in the left direction is stopped, the base portion 100 is rotated in the left direction relative to the rotation portion 310 due to the inertial force, so that the rotation portion 310 is rotated in the right direction relative to the base portion 100. The lifting portion 251 moves from the support surface 319 of the moving cam 317 to the inclined surface 318 and easily descends directly along the inclined surface 318. In this way, while the driving motor 31 is stopped, both the first movable blade portion 200A and the second movable blade portion 200B are close to the non-protruding position, and the rotating portion 310 is also close to the second barrier rib 117. When rotating in the right direction, that is, in the right direction, the rotating portion 310 is likely to directly contact the second blocking rib 117. Therefore, in consideration of such a phenomenon, in the present modified example, when the drive motor 31 is rotating in the forward direction, the processes of S1 to S4 of the energization control in FIG. 9 may not be performed, and it may be directly increased to the target rotation speed R1 with a large acceleration.

<Modification 2>

FIGS. 13A and 13B are cross-sectional views of the pulsator 26 around the first movable blade portion 200A according to the second modification.

In this modification, as shown in FIG. 13 (a), the side surfaces of the two arm portions 312 of the rotating portion 310 that are in contact with each of the first barrier ribs 116 and each of the second barrier ribs 117 are respectively attached with Buffer members 381 and 382 made of rubber, polyurethane, and sponge. In addition, in this modification, as shown in FIG. 13 (b), the surfaces of each of the first barrier ribs 116 and each of the second barrier ribs 117 that are in contact with the arm portion 312 of the rotating portion 310 may be attached separately. The buffer members 141 and 142 containing a material such as rubber, polyurethane, and sponge. The buffer members 381, 382, 141, and 142 alleviate the impact when each arm portion 312 of the rotating portion 310 comes into contact with the corresponding first barrier rib 116 and second barrier rib 117. Thereby, the collision noise is reduced. It should be noted that the buffer members 381 and 141 correspond to the first buffer portion of the present invention, and the buffer members 382 and 142 correspond to the second buffer portion of the present invention.

＜ Other changes ＞

In the pulsator 26 of the above embodiment, the fixed blade portion 130 is provided on the concave surface 112 of the base portion 100, and the top surface of the fixed blade portion 130 is provided as the placement surface 100 a on which the movable blade portion 200 is placed. However, the surface of the base portion 100 may be provided as a flat surface without being recessed, and the fixed blade portion 130 may not be provided, and a portion of the flat surface may be provided as the placement surface 100 a on which the movable blade portion 200 is placed.

In addition, although two movable blade portions 200 are provided in the pulsator 26 of the above embodiment, one or three or more movable blade portions 200 may be provided.

Furthermore, although the pulsator 26 of the above-mentioned embodiment is provided with a blade portion including only the fixed blade portion 130 and the movable blade portion 200, the pulsator may be configured such that a part of the blade portions of the plurality of blade portions is provided to include The blade portions of the fixed blade portion 130 and the movable blade portion 200 may be provided as blade portions including only the movable blade portion 200.

Furthermore, in the above-mentioned embodiment, as shown in FIG. 9, the section in which the rotation of the drive motor 31 increases toward the target rotation speed R1 includes a section at a constant speed maintained at the intermediate rotation speed R0. Rotational rise control in contact with the first and second barrier ribs 116 and 117. However, as shown in (a) and (b) of FIG. 14, a section in which the rotation of the drive motor 31 increases toward the target rotational speed R1 includes a low acceleration section S1 having a relatively small acceleration and a relatively large acceleration following the low acceleration section S1. In the high acceleration interval S2, in the low acceleration interval S1, the control unit 401 performs rotation-up control of the rotation portion 310 in contact with the first barrier rib 116 and the second barrier rib 117. Even when such a rotation-up control is performed, the same operational effects as those of the above-mentioned embodiment can be achieved.

Furthermore, in the pulsator 26 of the above-mentioned embodiment, in order to smoothly move the lifting portion 251 of the movable blade portion 200 on the inclined surface 318 of the moving cam 317, a lifting rod 250 having a small friction coefficient is used. However, it may be arranged that a roller is provided as a contact portion, and is in contact with the movable blade portion 200 and moves on the inclined surface 318, and the roller rolls on the inclined surface 318. In addition, the contact portion may be configured without using a separate member such as the lifting rod 250, and a part of the movable blade portion 200 may be moved on the inclined surface 318 as a contact portion.

Furthermore, in the said embodiment, the example which applied this invention to the fully automatic washing and drying machine 1 equipped with the clothes drying function was shown. However, the present invention is also applicable to a fully automatic washing machine that is not equipped with a clothes drying function.

In addition, the embodiment of the present invention can be appropriately modified in various ways within the scope of the technical idea described in the technical solution.

Claims (4)

1. A washing machine, comprising:

   A washing tub to hold laundry; and

   A pulsator configured at the bottom of the washing tub,

   The pulsator includes:

   Base

   The blade portion is arranged on a disposition surface provided on a surface of the base portion, and a protruding height protruding from the disposition surface is variable; and

   The variable mechanism part can change the protruding height of the blade part according to the rotation direction of the pulsator,

   The variable mechanism section includes:

   The rotating portion is disposed on the back side of the base portion and is rotatable relative to the base portion; and

   The moving part is provided at a position corresponding to the blade part in the rotating part, and when the rotating part rotates in a first direction, the blade part is moved from the first position to the first direction with the rotation. The position moves compared to the second position where the protruding height becomes higher,

   The base portion includes a first abutting portion, and when the blade portion moves to the second position, the rotating portion is in contact with the first abutting portion,

   When the rotating portion is in contact with the first abutting portion, the base portion rotates integrally with the rotating portion, and the pulsator rotates in the first direction,

   The washing machine further includes:

   A driving motor for rotating the rotating portion; and

   A control unit that controls the driving motor,

   When the control unit rotates the pulsator in the first direction so as to increase the rotation of the drive motor to a target rotation speed, the control unit controls the rotation of the drive motor to increase the rotation speed until the target rotation speed. The interval includes a first interval and a second interval subsequent to the first interval, so that the first interval has a uniform velocity or acceleration less than the second interval,

   In the first section, the rotating portion is in contact with the first abutting portion.
2. The washing machine according to claim 1, wherein:

   When the rotating part rotates in a second direction opposite to the first direction, the moving part moves the blade part from the second position to the first position with the rotation,

   The base portion includes a second abutting portion, and when the blade portion moves to the first position, the rotating portion is in contact with the second abutting portion,

   When the rotating portion is in contact with the second abutting portion, the base portion rotates integrally with the rotating portion, and the pulsator rotates in the second direction,

   The control section performs the rotation rising control on the driving motor when the pulsator is rotated in the second direction so as to increase the rotation of the driving motor to the target rotation speed,

   In the first section, the rotating portion is in contact with the second abutting portion.
3. The washing machine according to claim 2, further comprising:

   A first buffer portion that reduces an impact when the rotating portion is in contact with the first abutting portion; and

   The second buffer portion reduces an impact when the rotating portion is in contact with the second abutting portion.
4. The washing machine according to claim 2 or 3, wherein

   An inclined surface is provided on the moving part,

   The blade portion has a contact portion in contact with the inclined surface,

   The contact portion rises along the inclined surface when the blade portion moves from the first position to the second position, and moves along the blade portion when the blade portion moves from the second position to the first position. The inclined surface descends.

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