JP6343456B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine.

  In the fully automatic washing machine, a pulsator is rotatably disposed at the bottom of the washing and dewatering tank, and a water flow is generated by the rotation of the pulsator, the laundry is stirred by the generated water flow, and the laundry is washed. The laundry is also agitated when the pulsator itself contacts the laundry.

  When the water flow becomes complicated, the friction and twist between the laundry are promoted, so that the cleaning performance can be improved. Therefore, in a fully automatic washing machine, a configuration using a pulsator having an outer pulsator having blades on the outer peripheral part and an inner pulsator rotatably disposed in a housing part provided in the central part of the outer pulsator can be employed ( Patent Document 1). The outer pulsator rotates by the torque of the drive motor, and the inner pulsator rotates following the rotation of the outer pulsator when the outer pulsator rotates. When the inner pulsator and the outer pulsator rotate at different rotational speeds, a complicated water flow is generated in the washing and dewatering tank.

JP 2004-321629 A

  When a large amount of laundry is stored in the laundry dewatering tub, or when the amount of water stored in the laundry dewatering tub is small relative to the stored laundry, the laundry largely extends to the pulsator, A large load on the laundry can be applied to the pulsator.

  As described above, when the pulsator is composed of the outer pulsator and the inner pulsator, the load due to the laundry is distributed to the inner pulsator and the outer pulsator. The inner pulsator rotates while being placed on the outer pulsator. Therefore, when the load applied to the inner pulsator increases, the force acting on the contact surface between the inner pulsator and the outer pulsator increases, so that the frictional resistance between the inner pulsator and the outer pulsator increases. The outer pulsator is difficult to rotate due to a load directly applied from the laundry, and further, the outer pulsator is more difficult to rotate as the frictional resistance increases. In this case, there is a possibility that sufficient cleaning performance cannot be obtained.

  This invention is made | formed in view of this subject, and it aims at providing the washing machine which can aim at the improvement of washing | cleaning performance.

  A washing machine according to a main aspect of the present invention includes an outer tub, a laundry dewatering tub that is rotatably disposed in the outer tub, a pulsator that is rotatably disposed at the bottom of the laundry dewatering tub, and the pulsator. A drive unit that generates torque to be driven. Here, the pulsator includes a first pulsator that is rotated by the torque of the driving unit, a second pulsator that is rotatably disposed on a mounting unit provided in the first pulsator, and the second pulsator. And a restricting part for restricting the upward movement of the pulsator. The second pulsator is formed of a material having a specific gravity smaller than that of water, and has a contact portion corresponding to the restriction portion. A predetermined amount of gap that allows the second pulsator to move is provided in the vertical direction between the restricting portion and the contact portion.

  According to the above configuration, the second pulsator has a specific gravity smaller than that of water, and a gap is provided between the restricting portion and the contact portion. Therefore, in a state where water is stored in the laundry dewatering tub, Buoyancy acts on the second pulsator. For this reason, when the load by the laundry is added to the 2nd pulsator, the load added to the mounting part of the 1st pulsator via the 2nd pulsator is reduced by the buoyancy acting on the 2nd pulsator. Therefore, since it is possible to suppress an increase in the load applied to the first pulsator when a large load is applied to the pulsator, it is possible to suppress a decrease in the rotational speed of the first pulsator and to improve the cleaning performance. .

  In the washing machine according to this aspect, the first pulsator may be provided with a plurality of blades on the outer peripheral side with respect to the second pulsator. In this case, the blade has a first surface that rises from a root portion of the blade on the side facing one of the rotation directions so as to be perpendicular to a surface on which the first pulsator rotates. The second surface of the blade is inclined to the side facing the other direction of rotation of the blade and descends in the other direction of rotation, and the descending slope decreases from the inner peripheral side to the outer peripheral side of the first pulsator. It can be set as the structure which has.

  According to said structure, when a 1st pulsator rotates in one rotation direction, it will contact a laundry on the 1st surface of a blade | wing. Since the first surface rises perpendicular to the surface on which the pulsator rotates, the laundry is pushed by the first surface vigorously. Thereby, the movement of the laundry in the circumferential direction of the laundry dewatering tank becomes active. On the other hand, when the first pulsator rotates in the other rotation direction, the second surface comes into contact with the laundry. Since the second surface has a shape in which the gradient becomes gentler toward the outer peripheral side from the inner peripheral side of the first pulsator, the laundry moves to the outer peripheral side while being lifted by the second surface. Thereby, the movement of the laundry in the radial direction of the laundry dewatering tank becomes active.

  Therefore, according to the above configuration, when the first pulsator rotates to the left and right, the laundry is actively moved in various directions, so that an improvement in cleaning performance can be expected.

  When it is set as said structure, the protrusion part which protrudes from the top | upper part of the said blade | wing further can be formed in the said blade | wing.

  If it is set as such a structure, when the laundry is lifted by the 2nd surface and moves, it will be rubbed by a projection part. As a result, further improvement in cleaning performance can be expected.

  Further, in the case of the above configuration, the driving unit transmits a driving motor, a torque of the driving motor to the washing / dehydrating tub and the pulsator, and brakes the washing / dehydrating tub. A transmission mechanism having a one-way clutch that allows rotation of the laundry dewatering tub in the direction of tightening the brake and prevents rotation of the laundry dewatering tub in the loosening direction of the band brake. In this case, the rotation direction in which the first surface of the blade faces is the direction in which the rotation of the washing and dewatering tub is prevented by the one-way clutch.

  With such a configuration, the laundry dewatering tub can be prevented from moving even if the laundry is pushed by the first surface and comes into contact with the inner peripheral wall of the laundry dewatering tub. Thereby, since the laundry is rubbed firmly against the inner peripheral wall of the laundry dewatering tub that is stopped, the cleaning effect by the inner peripheral wall of the laundry dewatering tub can be sufficiently obtained. Moreover, it is possible to prevent abnormal noise from the band brake.

  The washing machine according to the present aspect may be configured such that a spacer is provided between the placement portion and the second pulsator, and the second pulsator slides on the spacer.

  When the first pulsator and the second pulsator are formed of a resin material, when the second pulsator slides on the mounting part, the second pulsator and the mounting part are welded by heat generated by the sliding. There is a risk of doing. In this case, the second pulsator becomes difficult to rotate.

  According to said structure, since a 2nd pulsator slides on a spacer, welding with a 2nd pulsator and a mounting part can be prevented.

  The washing machine according to this aspect may be configured such that the second pulsator is provided with a storage unit that stores a silver ion eluting body that elutes silver ions by contact with water.

  According to said structure, since a silver ion eluting body can be touched for a long time with the water stored in the washing | cleaning dewatering tank, a silver ion can fully be eluted from a silver ion eluting body. Thereby, it can be expected to improve the sterilization effect of the laundry by silver ions.

  In the washing machine according to this aspect, the placement unit is provided with a rotation shaft portion that protrudes upward, and the restriction portion is fixed on the rotation shaft portion, and the center portion of the second pulsator. The boss portion to be inserted into the rotating shaft portion is formed, the contact portion is formed at the boss portion, and the second pulsator has an opening above the boss portion, and the boss portion With the portion inserted into the rotating shaft portion, the top surface of the restricting portion fixed to the rotating shaft portion may be exposed in the washing and dewatering tub through the opening.

  According to said structure, since the top | upper surface of a control part rotates with a 1st pulsator, a rotational speed difference arises between a 2nd pulsator and the top | upper surface of a control part. Since the laundry comes into contact with the top surface of the rotating regulating part, the movement of the laundry in contact with the pulsator is more complicated than when the rotational speed difference occurs only between the first pulsator and the second pulsator. Become. Therefore, further improvement in cleaning performance can be expected.

  In addition, the term “vertical” described in the claims and claim 2 includes not only complete vertical but also a substantially vertical concept.

  ADVANTAGE OF THE INVENTION According to this invention, the washing machine which can aim at the improvement of washing | cleaning performance can be provided.

  The effects and significance of the present invention will become more apparent from the following description of embodiments. However, the following embodiment is merely an example when the present invention is implemented, and the present invention is not limited to what is described in the following embodiment.

It is side surface sectional drawing which shows the structure of the fully automatic washing machine based on embodiment. It is a plane sectional view showing typically the composition of the filter unit concerning an embodiment. It is a perspective view of the pulsator of the assembled state based on embodiment. It is a disassembled perspective view of the pulsator based on Embodiment. It is a top view of the outer pulsator based on Embodiment. It is AA 'sectional drawing of FIG. 5, BB' sectional drawing, and CC 'sectional drawing. It is an expansion perspective view of the principal part which shows the structure of the mounting part of the outer pulsator based on Embodiment. It is an enlarged plan view of the principal part which shows the structure of the mounting part of the outer pulsator based on Embodiment. It is a perspective view of the outside pulsator seen from the back concerning an embodiment. It is a section perspective view of an inner pulsator based on an embodiment. It is a top view of the inner pulsator based on Embodiment. It is a perspective view of the inner pulsator seen from the back side concerning an embodiment. It is the perspective view of the stopper seen from the front side based on embodiment, the perspective view of the stopper seen from the back side, and the cross-sectional perspective view of a stopper. It is the perspective view of the cap seen from the front side based on embodiment, and the perspective view of the cap seen from the back side. It is a perspective view of a spacer concerning an embodiment. It is a figure for demonstrating the procedure which assembles the pulsator based on Embodiment. It is a figure for demonstrating a motion of the inner pulsator when the outer pulsator rotates right and left based on Embodiment. It is a figure which shows a mode that the laundry is moved by the outer blade | wing of the outer pulsator based on Embodiment. It is a figure for demonstrating the structure which reduces the load added to an outer pulsator when the load by the laundry is applied to the inner pulsator from upper direction based on Embodiment. It is an expanded sectional perspective view of the principal part of a fully automatic washing machine showing signs that water is supplied into a pump room by operation of a pumping blade and a front blade of an outside pulsator concerning an embodiment. It is an expanded section perspective view of the important section of a fully automatic washing machine showing signs that it drains from the interior space of an inner pulsator concerning an embodiment. 6 is an enlarged longitudinal sectional view of a central part of a pulsator according to Modification Example 1. FIG. It is a perspective view of the pulsator of the assembled state based on the example 2 of a change. It is a disassembled perspective view of the pulsator based on the example 2 of a change. 10 is an enlarged longitudinal sectional view of a main part of a pulsator according to a modification example 2. FIG.

  Hereinafter, a fully automatic washing machine as an embodiment of the washing machine of the present invention will be described with reference to the drawings.

  FIG. 1 is a side sectional view showing the configuration of the fully automatic washing machine 1.

  The fully automatic washing machine 1 includes a housing 10 that constitutes the appearance. The housing 10 includes a rectangular cylindrical trunk portion 11 having upper and lower surfaces open, an upper plate 12 that covers the upper surface of the trunk portion 11, and a leg base 13 that supports the trunk portion 11. The top plate 12 has a laundry inlet 14 formed therein. The insertion port 14 is covered with an openable / closable upper lid 15.

  The outer tub 20 is elastically suspended and supported in the housing 10 by four suspension bars 21 each having a vibration isolator. A washing / dehydrating tank 22 is disposed in the outer tub 20. A large number of dewatering holes 22 a and a plurality of protrusions 22 b are formed on the inner peripheral surface of the laundry dewatering tank 22. A balance ring 23 is provided in the upper part of the laundry dewatering tub 22.

  A pulsator 24 is disposed at the bottom of the outer tub 20. A plurality of pumping blades 190 extending radially from the center of the back surface are formed on the back surface of the pulsator 24. These pumping blades 190 are arranged in a pump chamber 25 formed between the back surface of the pulsator 24 and the bottom surface of the washing and dewatering tank 22.

  A plurality of circulating water channel portions 26 extending in the vertical direction are disposed on the inner peripheral surface of the laundry dewatering tub 22. The lower end portion of each circulation water channel portion 26 is connected to the pump chamber 25. A slit-like discharge port 26 a is formed in the upper part of each circulation channel portion 26. A filter unit 27 is provided in one circulating water channel portion 26.

  2A to 2C are plan sectional views schematically showing the configuration of the filter unit 27. FIG.

  As shown in FIG. 2A, the filter unit 27 includes a filter case 27a whose rear surface is open. An opening 27b is formed on the front surface of the filter case 27a, and a lint filter 27c, which is a mesh ground bag, is attached to the opening 27b. The filter case 27a is attached to the circulating water channel portion 26 so as to be rotatable by a predetermined angle in the left-right direction around the rotation shaft 27d. As shown in FIGS. 2B and 2C, when the pulsator 24 rotates and a water flow in the left direction or the right direction is generated, the filter unit 27 is tilted in the left direction or the right direction. Thereby, the water which flows along the inner peripheral surface of the washing and dewatering tank 22 flows into the filter case 27a from the rear opening and passes through the lint filter 27c. At this time, lint that has flowed into the filter case 27a together with water is collected by the lint filter 27c.

  Returning to FIG. 1, a drive unit 30 that generates torque for driving the washing and dewatering tub 22 and the pulsator 24 is disposed on the outer bottom of the outer tub 20. The drive unit 30 corresponds to the drive unit of the present invention. The drive unit 30 includes a drive motor 31 and a transmission mechanism unit 32. The transmission mechanism 32 has a clutch mechanism, and in the washing process and the rinsing process, the torque of the drive motor 31 is transmitted only to the pulsator 24 by the switching operation by the clutch mechanism, and only the pulsator 24 is rotated. Then, the torque of the drive motor 31 is transmitted to the pulsator 24 and the washing / dehydrating tank 22 to rotate the pulsator 24 and the washing / dehydrating tank 22 integrally. Moreover, the transmission mechanism part 32 has a reduction mechanism. In the washing process and the rinsing process, the pulsator 24 rotates at a rotational speed at which the rotational speed of the drive motor 31 is lowered according to the reduction ratio of the speed reduction mechanism. Further, the transmission mechanism 32 allows the hand brake that brakes the laundry dewatering tank 22 and the rotation of the laundry dewatering tank 22 in the tightening direction of the band brake to allow the rotation of the laundry dewatering tank 22 in the loosening direction of the band brake. And a one-way clutch for blocking. In the present embodiment, the clockwise direction when viewed from above is the tightening direction of the brake band, and the counterclockwise direction is the band brake loosening direction, that is, the direction in which the rotation of the washing and dewatering tub 22 is prevented by the one-way clutch.

  A drain port 20 a is formed in the outer bottom of the outer tub 20. A drain valve 40 is provided in the drain port 20a. The drain valve 40 is connected to the drain hose 41. When the drain valve 40 is opened, the water stored in the washing and dewatering tub 22 and the outer tub 20 is discharged out of the machine through the drain hose 41.

  A water supply unit 50 for supplying tap water into the laundry dewatering tub 22 is disposed at the rear of the top plate 12. The water supply unit 50 has a water supply valve 51. The water supply valve 51 is connected to a water tap. When the water supply valve 51 is opened, tap water is introduced from the water tap into the water supply unit 50. The introduced tap water flows out from the water inlet 52 of the water supply unit 50 into the washing and dewatering tank 22.

  The fully automatic washing machine 1 performs washing operation of various operation courses. The washing operation includes a washing process, an intermediate dehydration process, a rinsing process, and a final dehydration process.

  In the washing step and the rinsing step, the pulsator 24 rotates rightward and leftward with water stored in the washing / dehydrating tub 22. As the pulsator 24 rotates, a water flow is generated in the laundry dewatering tub 22. In the washing step, the laundry is washed with the generated water flow and the detergent contained in the water. In the rinsing process, the laundry is rinsed by the generated water flow. Further, in the washing step and the rinsing step, the pumping blade 190 rotates in the pump chamber 25 as the pulsator 24 rotates. Water between the washing / dehydrating tub 22 and the outer tub 20 is sucked into the pump chamber 25 from a water passage 22 c provided on the bottom surface of the washing / dehydrating tub 22. The water sucked into the pump chamber 25 is sent to each circulation channel section 26, and the water sent to each circulation channel section 26 flows out from the discharge port 26a toward the center of the washing and dewatering tank 22. Thereby, water can be sufficiently contained in the laundry above the laundry dewatering tank 22.

  In the intermediate dehydration process and the final dehydration process, the laundry dewatering tank 22 and the pulsator 24 rotate as a unit at a high speed. The laundry is dehydrated by the action of centrifugal force generated in the laundry dewatering tub 22.

  The fully automatic washing machine 1 of this embodiment is characterized by the configuration of the pulsator 24, and the configuration of the pulsator 24 will be described in detail below.

  FIG. 3 is a perspective view of the pulsator 24 in an assembled state. FIG. 4 is an exploded perspective view of the pulsator 24. FIG. 5 is a plan view of the outer pulsator 100. FIGS. 6A, 6B, and 6C are cross-sectional views taken along lines AA ′, BB ′, and CC in FIG. 5, respectively. 'Is a cross-sectional view. FIG. 7 and FIG. 8 are an enlarged perspective view and an enlarged plan view of the main part showing the configuration of the mounting part 110 of the outer pulsator 100, respectively. FIG. 9 is a perspective view of the outer pulsator 100 viewed from the back. 10, FIG. 11 and FIG. 12 are a sectional perspective view of the inner pulsator 200, a plan view of the inner pulsator 200, and a perspective view of the inner pulsator 200 as seen from the back side. 13A, 13B, and 13C are a perspective view of the stopper 300 viewed from the front side, a perspective view of the stopper 300 viewed from the back side, and a cross-sectional perspective view of the stopper 300, respectively. 14A and 14B are a perspective view of the cap 400 viewed from the front side and a perspective view of the cap 400 viewed from the back side, respectively. FIG. 15 is a perspective view of the spacer 500.

  Referring to FIGS. 3 and 4, pulsator 24 includes outer pulsator 100, inner pulsator 200 that is rotatably disposed at the center of outer pulsator 100, and a stopper 300 that restricts upward movement of inner pulsator 200. A cap 400 attached to the center of the inner pulsator 200, a spacer 500 sandwiched between the outer pulsator 100 and the inner pulsator 200, and three first screws 600 for fixing the spacer 500 to the outer pulsator 100. And three second screws 700 for fixing the stopper 300 to the outer pulsator 100. The outer pulsator 100 corresponds to the first pulsator of the present invention, and the inner pulsator 200 corresponds to the second pulsator of the present invention. The stopper 300 corresponds to the restricting portion of the present invention.

  First, the configuration of the outer pulsator 100 will be described.

  Referring to FIGS. 4, 5, and 6 (a) to 6 (c), outer pulsator 100 has a disk shape and is formed of a resin material, for example, a polypropylene resin. On the surface of the outer pulsator 100, a circularly recessed mounting portion 110 is formed in the center portion where the inner pulsator 200 is rotatably mounted. Further, on the surface of the outer pulsator 100, five outer blades 120 are formed at substantially equal intervals in a region outside the mounting portion 110. The outer blade 120 corresponds to the blade of the present invention. Between the two adjacent outer blades 120, a first drain hole portion 130 made up of a number of holes is formed in order to discharge water accumulated in the region outside the mounting portion 110.

  The outer blade 120 has a shape close to a bowl shape when viewed from above. The outer blade 120 has a substantially flat wall 121 that rises from the base of the outer blade 120 so as to be substantially perpendicular to the surface on which the outer pulsator 100 rotates, on the side facing the counterclockwise direction. Moreover, the outer blade | wing 120 has the substantially sector-shaped inclined surface 122 which goes to the clockwise direction on the side which faces a clockwise direction. As shown in FIGS. 6A to 6C, the inclined surface 122 has a downward gradient that decreases from the inner peripheral side to the outer peripheral side of the outer pulsator 100. Furthermore, the outer peripheral part 123 of the outer blade 120 is inclined so as to descend gently in the clockwise direction. The absolute wall 121 corresponds to the first surface of the present invention, and the inclined surface 122 corresponds to the second surface of the present invention.

  The outer blade 120 has a top 120a connected to the wall surface 121 and the inclined surface 122, and a projection 124 protruding upward is formed on the top 120a. The protrusion 124 has an elongated shape extending from the inner peripheral side to the outer peripheral side of the outer pulsator 100 and has a flat upper surface.

  Referring to FIGS. 7 and 8, annular groove 140 is formed on the outer peripheral edge of mounting portion 110. Five first drain holes 141 are formed in the groove part 140 at substantially equal intervals. The height of the groove part 140 is higher than the bottom surface of the mounting part 110 and lower than the surface of the outer pulsator 100. A cylindrical mounting table 150 is formed at the center of the mounting portion 110. The mounting table 150 corresponds to the mounting unit of the present invention. Two positioning protrusions 151 are formed on the surface of the mounting table 150 at an interval of approximately 180 degrees. Further, three first mounting holes 152 are formed on the surface of the mounting table 150 at substantially equal intervals. The positioning protrusion 151 and the first mounting hole 152 are used for fixing the spacer 500 to the mounting table 150.

  A cylindrical rotation shaft portion 160 is formed at the center of the mounting table 150. A circular shaft hole 161 is formed at the center of the upper surface of the rotating shaft portion 160, and a stopper fixing portion 162 to which the stopper 300 is attached is formed so as to surround the shaft hole 161. The stopper fixing portion 162 includes three mounting bosses 163 arranged at substantially equal intervals, and arc-shaped wall portions 164 provided on both sides of each mounting boss 163. A second mounting hole 165 is formed in the mounting boss 163. A slit portion 166 is formed between two adjacent wall portions 164.

  A plurality of front blades 170 are formed radially on the mounting portion 110 from the mounting table 150. The front blade 170 is connected to the groove 140. The portion of the front blade 170 from the mounting table 150 side to the substantially center has the same height, and the portion from the center portion of the front blade 170 to the groove portion 140 is gradually raised toward the groove portion 140.

  The region between the mounting table 150 and the groove 140 in the mounting unit 110 is partitioned by the front blades 170, and the first partition chamber 171 and the second partition chamber 172 are rotated in the region by the rotation of the outer pulsator 100. Provided alternately in the direction. In the first compartment 171, two second drain holes 173 are formed on the bottom surface, and in the second compartment 172, a water passage hole 174 is formed on the outer peripheral wall.

  Referring to FIG. 9, an outer boss 180 is formed at the center of the back surface of outer pulsator 100. A metal inner boss 181 is provided inside the outer boss 180. The inner boss 181 is embedded in the outer boss 180 by insert molding. A blade shaft 33 (see FIG. 17B) for rotating the pulsator 24 is attached to the inner boss 181. A plurality of pumping blades 190 are formed radially from the outer boss 180 on the back surface of the outer pulsator 100.

  Next, the configuration of the inner pulsator 200 will be described.

  Referring to FIGS. 4, 10, 11, and 12, inner pulsator 200 is formed of a resin material having a reverse saddle shape and a specific gravity smaller than that of water. In the present embodiment, the material of the inner pulsator 200 is polypropylene resin (PP). The material of the inner pulsator 200 may be a resin material having a specific gravity smaller than that of other water, for example, a polyethylene resin (PE) or an ethylene / vinyl acetate copolymer resin (EVA).

  The inner pulsator 200 has a circular opening 210 at the center. A plurality of inner blades 220 are formed radially from the outer peripheral edge of the opening 210 on the surface of the inner pulsator 200. The inner blade 220 is formed such that the first side surface 221 facing the clockwise direction has a steeper inclination than the second side surface 222 facing the counterclockwise direction. The second side surface 222 is formed with a second drain hole 223 made up of a number of holes in order to discharge water accumulated between the two inner blades 220.

  A substantially cylindrical boss 230 is formed on the back surface of the inner pulsator 200 so as to hang from the outer peripheral edge of the opening 210. The boss part 230 includes an upper cylinder part 231 and a lower cylinder part 232 following the upper cylinder part 231. The lower cylinder part 232 has a slightly smaller outer diameter and inner diameter than the upper cylinder part 231. On the inner peripheral wall of the boss portion 230, an annular flange portion 233 is formed that projects inwardly at the boundary portion between the upper cylindrical portion 231 and the lower cylindrical portion 232. The collar part 233 corresponds to a hit part of the present invention.

  A step surface 234 that is one step lower than the upper surface of the inner pulsator 200 is formed at the upper end of the inner peripheral wall of the upper cylindrical portion 231. In addition, two slit grooves 235 are formed on the inner peripheral wall of the upper cylindrical portion 231 at positions facing each other, and further, two rectangular engagement holes 236 are formed so as to be shifted from the two slits by approximately 90 degrees. Is done. Further, a plurality of reinforcing ribs 237 extending vertically are formed on the outer peripheral wall of the lower cylindrical portion 232 so as to reinforce the boss portion 230.

  On the back surface of the inner pulsator 200, back blades 240 that extend radially from the boss portion 230 to the outer peripheral portion of the inner pulsator 200 are formed at all valley positions between two adjacent inner blades 220. An annular rib 241 that hangs down from the outer peripheral edge is formed on the back surface of the inner pulsator 200.

  Next, the configuration of the stopper 300 will be described.

  Referring to FIGS. 13A, 13B, and 13C, stopper 300 has a circular shape when viewed from above. An annular guard rib 311 is formed on the outer peripheral portion 310 of the stopper 300. Further, three insertion holes 312 through which the second screw 700 is passed are formed in the outer peripheral portion 310 at substantially equal intervals. Further, the stopper 300 is formed with a mortar-shaped recess 320 inside the outer periphery 310, and a circular opening 321 is formed at the center of the recess 320.

  A cylindrical portion 330 is formed on the back surface of the recess 320 so as to hang down from the outer peripheral edge of the opening 321. The distal end portion 331 of the cylindrical portion 330 has a smaller outer diameter than the other portions of the cylindrical portion 330. A drain port 332 is formed in the cylindrical portion 330. Further, a boss accommodating portion 340 for accommodating the mounting boss 163 of the stopper fixing portion 162 is formed on the back surface of the recess 320 by recessing the peripheral portion of the insertion hole 312 inward. Further, three guide ribs 341 are formed on the back surface of the recess 320. Each guide rib 341 is located in the middle of the two insertion holes 312.

  Next, the configuration of the cap 400 will be described.

  Referring to FIGS. 14A and 14B, the cap 400 includes a disc-shaped top plate portion 410 and a peripheral wall that is suspended from the outer peripheral edge of the top plate portion 410 and has a slightly smaller outer diameter than the top plate portion 410. The unit 420 is configured. Two guide ribs 421 are formed on the outer peripheral surface of the peripheral wall 420 at an interval of approximately 180 degrees. Furthermore, two claw portions 422 are formed on the outer peripheral surface of the peripheral wall portion 420 at a position that is substantially 90 degrees away from the two guide ribs 421. Similar to the inner pulsator 200, the cap 400 is formed of a resin material having a specific gravity smaller than that of water, for example, polypropylene resin (PP). In addition, the cap 400 may be formed of polyethylene resin (PE), ethylene / vinyl acetate copolymer resin (EVA), or the like.

  Next, the spacer 500 will be described.

  Referring to FIG. 15, spacer 500 has a donut-shaped disk shape, and is made of a material having a smaller friction coefficient and superior wear resistance than the resin material forming outer pulsator 100, for example, stainless steel. In the spacer 500, the inner diameter D <b> 1 is slightly larger than the outer diameter of the rotating shaft portion 160, and the outer diameter D <b> 2 is substantially equal to the outer diameter of the mounting table 150. Two positioning holes 510 are formed in the spacer 500 with a gap of approximately 180 degrees. In addition, the spacer 500 is formed with six notch holes 520 through which the second screw 700 is passed at substantially equal intervals. The spacer 500 may be formed of a metal material coated with polytetrafluorostyrene.

  FIGS. 16A to 16D are views for explaining the procedure for assembling the pulsator 24.

  When the pulsator 24 is assembled, first, the spacer 500 is arranged on the mounting table 150 of the outer pulsator 100. At this time, each positioning projection 151 is inserted into each positioning hole 510. Any three of the six cutout holes 520 are aligned with the three first mounting holes 152. The three first screws 600 are fixed to the three first mounting holes 152, and the spacer 500 is fixed to the mounting table 150 as shown in FIG.

  Next, as shown in FIG. 16 (b), the inner pulsator 200 is disposed in the mounting portion 110. At this time, the rotating shaft portion 160 is inserted into the boss portion 230, and the boss portion 230 is placed on the spacer 500 attached to the mounting table 150. The annular rib 241 on the outer peripheral edge of the inner pulsator 200 and the groove 140 on the outer peripheral edge of the mounting portion 110 face each other with a predetermined distance. As a result, foreign matter is prevented from entering the space formed between the inner pulsator 200 and the mounting portion 110, that is, the inner space of the inner pulsator 200.

  Next, the stopper 300 is inserted into the boss portion 230 and the stopper 300 is attached to the stopper fixing portion 162. At this time, the distal end portion 331 of the cylindrical portion 330 of the stopper 300 is inserted into the shaft hole 161 of the rotary shaft portion 160, and the guide rib 341 of the stopper 300 is inserted into the slit portion 166 of the stopper fixing portion 162. Further, the upper end portions of the mounting bosses 163 of the stopper fixing portion 162 are accommodated in the boss housing portions 340 of the stopper 300, and the insertion holes 312 of the stopper 300 and the second mounting holes 165 of the mounting bosses 163 are aligned. The three second screws 700 are fixed to the three second mounting holes 165, and the stopper 300 is fixed to the stopper fixing portion 162 as shown in FIG. When the outer peripheral portion 310 of the stopper 300 overlaps above the flange portion 233 of the boss portion 230 and the inner pulsator 200 moves upward, the flange portion 233 hits the outer peripheral portion 310 of the stopper 300. In this way, the upward movement of the inner pulsator 200 is restricted by the stopper 300, and the inner pulsator 200 cannot be removed from the rotating shaft 160. Further, the outer peripheral portion 310 and the guard rib 311 of the stopper 300 and the inner wall surface of the boss portion 230 face each other with a predetermined amount of gap. Thereby, the stopper 300 functions as a rotation shaft that becomes the rotation center of the inner pulsator 200 together with the rotation shaft portion 160. The inner pulsator 200 can move in the radial direction by the amount of the gap between the inner peripheral wall of the boss portion 230 and the stopper 300.

  Finally, as shown in FIG. 16 (d), the opening 210 on the upper surface of the inner pulsator 200 is closed with a cap 400. When the cap 400 is fitted into the boss portion 230, the guide rib 421 of the cap 400 is inserted into the slit groove 235 of the boss portion 230. When the cap 400 is fitted into the boss portion 230 until the back surface of the top plate portion 410 contacts the stepped surface 234 of the boss portion 230, the claw portion 422 of the cap 400 engages with the upper end portion of the engagement hole 236 of the boss portion 230. . As a result, the cap 400 does not come out upward.

  In this way, the assembly of the pulsator 24 is completed.

  Next, the operation of the pulsator 24 will be described.

  FIGS. 17A and 17B are diagrams for explaining the movement of the inner pulsator 200 when the outer pulsator 100 rotates left and right. FIG. 17A is a perspective view of the pulsator 24, and FIG. 17B is an enlarged cross-sectional perspective view of the central portion of the pulsator 24.

  In the pulsator 24, the outer pulsator 100 is connected to the blade shaft 33. When the blade shaft 33 is rotated by the torque of the drive motor 31, the outer pulsator 100 rotates. Since the inner pulsator 200 is not connected to the blade shaft 33, it is not directly driven by the drive motor 31.

  In the washing step or the rinsing step, when the outer pulsator 100 rotates clockwise or counterclockwise, the water accumulated in the washing / dehydrating tub 22 is stirred by the outer blade 120, and clockwise or counterclockwise in the washing / dehydrating tub 22. Water flow is generated. The inner blade 220 of the inner pulsator 200 is pushed by the generated water flow, and the inner pulsator 200 rotates. Here, as shown in FIG. 17 (a), when the outer pulsator 100 rotates counterclockwise, the outer wall 120 of the outer blade 120, which is likely to become water resistance, pushes the water. Occur. The inner blade 220 of the inner pulsator 200 receives a strong water flow by the first side surface 221 that desires a clockwise direction. Since the first side surface 221 is formed with a steep slope and easily receives a water flow, the inner pulsator 200 rotates counterclockwise at a high speed. On the other hand, when the outer pulsator 100 rotates clockwise, the inclined surface 122 of the outer blade 120 that hardly resists water pushes the water, so that a weak water flow is generated. The inner blade 220 of the inner pulsator 200 receives a weak water flow by the second side surface 222 that desires the counterclockwise direction. The second side surface 222 is formed with a gentler gradient than the first side surface 221, and is less susceptible to water flow, so the inner pulsator 200 rotates clockwise at a low speed.

  Further, as shown in FIG. 17B, when the outer pulsator 100 rotates, the front blades 170 formed in the mounting portion 110 rotate, so that the water accumulated in the inner space of the inner pulsator 200 is stirred into the front blades 170. Is done. A water flow is generated in the internal space of the inner pulsator 200, and the force generated by the generated water flow acts on the back surface of the inner pulsator 200. Thereby, the inner pulsator 200 rotates not only by the force of the water flow by the outer blade 120 of the outer pulsator 100 but also by the force of the water flow by the front blade 170 of the outer pulsator 100. In particular, since the back blade 240 is formed on the back surface of the inner pulsator 200, the inner pulsator 200 can effectively receive the force of the water flow by the front blade 170 by the back blade 240.

  Further, when the inner pulsator 200 is rotating, the boss portion 230 can come into contact with the stopper 300 or the mounting table 150, or the outer peripheral edge of the inner pulsator 200 can come into contact with the outer peripheral edge of the mounting portion 110. The inner pulsator 200 is also rotated by receiving a force from the contacted portion.

  Thus, in the present embodiment, the outer pulsator 100 is rotated by the torque of the drive motor 31, and the inner pulsator 200 is obtained by contact with the force of water flow generated by the rotation of the outer pulsator 100 and the outer pulsator 100. Rotate by force. For this reason, the rotational speed of the inner pulsator 200 is slower than the rotational speed of the outer pulsator 100. Due to the difference in rotational speed between the outer pulsator 100 and the inner pulsator 200, a complicated water flow is generated in the laundry dewatering tub 22 and the movement of the laundry in the laundry dewatering tub 22 becomes complicated. Thereby, since the rubbing of the laundry is promoted, an improvement in cleaning performance can be expected. In addition, when a rotational speed difference occurs between the outer pulsator 100 and the inner pulsator 200, a difference in mechanical force acting on the laundry occurs between the inside and the outside of the pulsator 24 when the laundry comes into contact with the rotating pulsator 24. Thereby, since it becomes easy to produce a twist in the laundry which contacted the pulsator 24, the improvement of a cleaning performance can be anticipated.

  Furthermore, in the present embodiment, the pulsator 24 generates a water flow in the inner space of the inner pulsator 200 by the front blades 170 provided in the mounting portion 110 of the outer pulsator 100, and transmits the force generated by this water flow to the back surface of the inner pulsator 200. It is set as such. Thereby, the inner pulsator 200 can be well rotated with the rotation of the outer pulsator 100. In particular, in the present embodiment, since the water flow by the front blade 170 can be effectively received by the back blade 240 of the inner pulsator 200, the inner pulsator 200 can be further rotated. Therefore, since the laundry can be well stirred by the inner pulsator 200, an improvement in cleaning performance can be expected. Further, in the washing step, the water containing the detergent is well agitated by the front blade 170 and the back blade 240 in the inner space of the inner pulsator 200, so that the detergent can be well foamed.

  Further, in the present embodiment, the steeply inclined first side surface 221 receives a strong water flow due to the outer wall surface 121 of the outer blade 120, and the weakly inclined second surface 222 receives a weak water flow due to the inclined surface 122 of the outer blade 120. As a result, a large rotational speed difference occurs in the inner pulsator 200 between the left-handed direction and the right-handed direction. Thereby, since the water flow by the inner pulsator 200 is complicated and the movement of the laundry due to the contact with the inner pulsator 200 is also complicated, an improvement in washing performance can be expected.

  Furthermore, in the present embodiment, a strong water flow is generated in the washing / dehydrating tub 22 due to the outer wall surface 121 of the outer blade 120, so that the amount of water passing through the filter unit 27 increases. Thereby, the collection efficiency of lint by the filter unit 27 is improved.

  FIGS. 18A and 18B are views showing a state in which the laundry is moved by the outer blade 120 of the outer pulsator 100. FIG.

  As shown in FIG. 18A, when the pulsator 24 rotates counterclockwise, the wall surface 121 of the outer blade 120 of the outer pulsator 100 comes into contact with the laundry. Since the wall surface 121 rises substantially perpendicular to the surface on which the pulsator 24 rotates, the laundry is pushed by the wall surface 121 vigorously. Thereby, the movement of the laundry in the circumferential direction of the laundry dewatering tank 22 becomes active. On the other hand, as shown in FIG. 18B, when the pulsator 24 rotates clockwise, the inclined surface 122 of the outer blade 120 of the outer pulsator 100 comes into contact with the laundry. Since the inclined surface 122 has a shape in which the gradient becomes gentler toward the outer peripheral side from the inner peripheral side of the outer pulsator 100, the laundry that comes into contact moves to the outer peripheral side while being lifted by the inclined surface 122. Thereby, the movement of the laundry in the radial direction of the laundry dewatering tank 22 becomes active.

  Accordingly, in the present embodiment, when the pulsator 24 rotates to the left and right, the laundry is actively moved in various directions, so that it is possible to expect an improvement in cleaning performance.

  Further, the laundry is rubbed by the protrusions 124 formed on the top of the outer blade 120 when the laundry is lifted and moved by the inclined surface 122. As a result, further improvement in cleaning performance can be expected.

  Further, in the present embodiment, the rotation direction of the pulsator 24 on which the outer wall surface 121 of the outer blade 120 functions is the same counterclockwise direction as the direction in which the rotation of the washing and dewatering tub 22 is prevented by the one-way clutch of the transmission mechanism unit 32. Has been.

  When the laundry moves greatly due to the absolute wall surface 121, the laundry comes into contact with the inner wall surface of the laundry dewatering tub 22, particularly the protrusion 22b and the circulating water channel 26 on the inner wall surface. A rotational force for rotating the laundry dewatering tub 22 is applied. The laundry dewatering tub 22 is prevented from rotating clockwise by the band brake of the transmission mechanism 32. However, when a large rotational force is applied in the clockwise direction, the band brake slips and the laundry dewatering tub 22 moves. Cheap. When the washing / dehydrating tub 22 moves, the laundry becomes difficult to be rubbed against the inner wall surface and the protruding portion 22b of the washing / dehydrating tub 22, and the cleaning effect by the inner wall surface and the protruding portion 22b of the washing / dehydrating tub 22 is hardly obtained. Further, when the washing / dehydrating tub 22 moves, there is a possibility that abnormal noise is generated from the band brake.

  In the present embodiment, the direction in which the laundry is vigorously pushed by the wall surface 121 is the same as the direction in which the rotation of the laundry dewatering tub 22 is prevented by the one-way clutch. For this reason, even if the laundry is in contact with the washing / dehydrating tub 22 vigorously, the washing / dehydrating tub 22 can be prevented from moving, and the washing effect by the inner wall surface and the protruding portion 22b of the washing / dehydrating tub 22 can be sufficiently obtained. it can. Moreover, it is possible to prevent abnormal noise from the band brake.

  FIG. 19 is a diagram for explaining a configuration in which a load applied to the outer pulsator 100 is reduced when a load due to laundry is applied to the inner pulsator 200 from above, and is an enlarged vertical sectional view of a central portion of the pulsator 24. is there.

  When a large amount of laundry is stored in the laundry dewatering tub 22 or when the amount of water stored in the laundry dewatering tub 22 is small with respect to the stored laundry, the laundry largely extends to the pulsator 24. Thus, a large load due to the laundry can be applied to the inner pulsator 200 and the outer pulsator 100.

  In the present embodiment, the inner pulsator 200 is formed of a material having a specific gravity smaller than that of water. Further, as shown in FIG. 19, in a state where the lower end of the boss portion 230 of the inner pulsator 200 is in contact with the surface of the spacer 500, the inner pulsator is interposed between the flange portion 233 of the boss portion 230 and the outer peripheral portion 310 of the stopper 300. A predetermined amount of gap S that enables upward movement of 200 is provided. The clearance S is much larger than the design tolerance, for example, about 1.5 mm when the tolerance is about 0.5 mm. Thereby, even if a dimensional error occurs in components such as the boss portion 230, a sufficient gap S is secured between the flange portion 233 and the outer peripheral portion 310. Thereby, when water is stored in the washing and dewatering tank 22, the inner pulsator 200 can be lifted by the gap S due to the buoyancy of the water.

  As described above, in the present embodiment, the inner pulsator 200 can be lifted to some extent upward, and therefore when the load Fa due to the laundry is applied to the inner pulsator 200, the outer pulsator 100 is The load Fb applied to the mounting table 150 is reduced by the buoyancy Fc acting on the inner pulsator 200. Thereby, it can suppress that the frictional resistance between the boss | hub part 230 of the inner pulsator 200 and the spacer 500 increases largely by the load added to the inner pulsator 200. FIG. Therefore, since an increase in the load applied to the outer pulsator 100 when a large load is applied to the pulsator 24 as a whole can be suppressed, a decrease in the rotational speed of the outer pulsator 100 can be suppressed, and the cleaning performance can be improved. Can do.

  Furthermore, in the present embodiment, the spacer 500 having a small friction coefficient and excellent wear resistance is disposed between the boss portion 230 and the mounting table 150, that is, in the sliding portion between the inner pulsator 200 and the outer pulsator 100. The increase in frictional resistance generated between the inner pulsator 200 and the outer pulsator 100 when a large load is applied to the inner pulsator 200 can be further suppressed. Thereby, the fall of the rotational speed of the outer pulsator 100 can be suppressed further.

  Further, since the outer pulsator 100 and the inner pulsator 200 are formed of a resin material, when the inner pulsator 200 slides on the mounting table 150, the inner pulsator 200 and the mounting table 150 may be welded by heat generated by the sliding. There is. As a result, the inner pulsator 200 is difficult to rotate. In the present embodiment, since inner pulsator 200 slides on spacer 500, welding between inner pulsator 200 and mounting table 150 can be prevented.

  In particular, in the present embodiment, since the pulsator 24 can move the laundry well by the wall surface 121 of the outer blade 120, the load applied to the outer pulsator 100 tends to increase. However, in the present embodiment, as described with reference to FIG. 19, the load applied from the inner pulsator 200 is reduced. Therefore, it is not necessary to increase the torque of the drive motor 31 and the cost can be reduced accordingly. It becomes possible.

  FIG. 20 is an enlarged cross-sectional perspective view of a main part of the fully automatic washing machine 1 showing a state in which water is supplied into the pump chamber 25 by the operation of the pumping blade 190 and the front blade 170 of the outer pulsator 100.

  As described with reference to FIG. 1, the pumping blades 190 formed on the back surface of the outer pulsator 100 are accommodated in the pump chamber 25 of the laundry dewatering tank 22 in a state where the pulsator 24 is disposed in the laundry dewatering tank 22. . When the pumping blade 190 rotates in the pump chamber 25 as the outer pulsator 100 rotates, the water between the washing and dewatering tub 22 and the outer tub 20 is pumped from the water inlet 22c as shown by the broken line arrows in FIG. It is sucked into the room 25. The sucked water is sent to the circulating water channel section 26.

  In the present embodiment, a water passage hole 174 connected to the pump chamber 25 is provided in the second compartment 172 partitioned by the two front blades 170. As a result, when the outer blade 170 rotates with the rotation of the outer pulsator 100, the gap L between the outer peripheral edge of the inner pulsator 200 and the groove 140 of the mounting portion 110, and the inner pulsator 200, as shown by the solid arrows in FIG. The water in the washing and dewatering tub 22 flows into the internal space of the inner pulsator 200 through the second drain hole 223. The inflowing water flows in the second partition chamber 172 from the inner peripheral side toward the outer peripheral side, and flows out from the water passage hole 174 to the pump chamber 25. The water that has flowed into the pump chamber 25 from the inner space of the inner pulsator 200 is sent to the circulating water channel section 26.

  Thus, in the present embodiment, not only the water between the washing and dewatering tub 22 and the outer tub 20 but also the water in the washing and dewatering tub 22 can be fed into the pump chamber 25. The amount of water supplied can be increased. Thereby, water can be sufficiently poured from the discharge port 26a of the circulating water channel portion 26 to the laundry in the laundry dewatering tank 22.

  FIG. 21 is an enlarged cross-sectional perspective view of a main part of the fully automatic washing machine 1 showing a state in which water is drained from the internal space of the inner pulsator 200.

  In the draining process, when the water is drained from the outer tub 20, the water accumulated in the inner space of the inner pulsator 200, as shown by the solid line arrow in FIG. The water is discharged to the bottom of the washing and dewatering tank 22 through the water passage hole 174 of the two compartment 172. Further, the water accumulated in the stopper 300 is discharged into the first compartment 171 or the second compartment 172 through the water drain port 332 as indicated by a broken line arrow. Further, the water accumulated in the groove 140 is discharged to the bottom of the washing and dewatering tank 22 through the first drain hole 141.

  Thus, in the present embodiment, the mounting portion 110 is provided with the first drain hole 141, the second drain hole 173, and the water passage hole 174 as drain holes connected to the bottom of the washing / dehydrating tub 22. Thereby, in the drainage process, the water stored in the internal space of the inner pulsator 200 can be smoothly discharged.

  Further, in the present embodiment, the second drain hole 173 is provided only in the first compartment 171, and the water passage hole 174 is provided only in the second compartment 172. That is, the second drain holes 173 and the water holes 174 are alternately provided in all the compartments partitioned by the front blades 170. Thereby, the strength fall of the outer pulsator 24 by providing the 2nd drain hole 173 and the water flow hole 174 can be suppressed as much as possible.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and the like, and various modifications can be made to the embodiments of the present invention in addition to the above. is there.

<Modification 1>
FIG. 22 is an enlarged longitudinal sectional view of the central portion of the pulsator 24 according to the first modification.

  In this modified example, the silver ion elution member 800 is accommodated in the space between the stopper 300 and the cap 400. That is, the space between the stopper 300 and the cap 400 is used as the accommodating portion 810 of the silver ion eluting member 800. The silver ion elution member 800 has a configuration in which a large number of silver ion elution pieces 802 are accommodated in a water-permeable bag 801 formed of a nonwoven fabric or the like. The silver ion elution pieces 802 are, for example, ion beads in which silver is kneaded into a soluble glass member. The silver ion eluting piece 802 corresponds to the silver ion eluting body of the present invention.

  When the silver ion elution member 800 is immersed in water by storing water in the laundry dewatering tub 22, silver ions are eluted from the silver ion elution pieces 802, and the eluted silver ions pass through the bag body 801. In this way, the silver ions that have flowed out of the silver ion elution member 800 pass through the engagement holes 236 of the boss portion 230 and the like and flow out into the washing and dewatering tub 22. Thereby, the water in the washing and dewatering tank 22 is in a state containing silver ions. Therefore, in the washing process and the rinsing process, the laundry in the laundry dewatering tub 22 is sterilized by silver ions.

  As described above, in this modified example, the pulsator 24 is provided with the accommodating portion 810 in which the silver ion eluting member 800 is accommodated. Thus, silver ions can be sufficiently eluted from the silver ion elution piece 802. Thereby, it can be expected to improve the sterilization effect of the laundry by silver ions.

<Modification 2>
23, 24, and 25 are diagrams showing the configuration of the pulsator 24 according to the second modification. FIG. 23 is a perspective view of the pulsator 24 in an assembled state. FIG. 24 is an exploded perspective view of the pulsator 24. FIG. 25 is an enlarged vertical cross-sectional view of the main part of the pulsator 24.

  The pulsator 24 of this modification includes an outer pulsator 100, an inner pulsator 200, a stopper 350, and two screws 750 for fixing the stopper 350 to the outer pulsator 100. The pulsator 24 of this modification example does not include the cap 400 and the spacer 500.

  In the outer pulsator 100, the shapes of the mounting table 150, the rotating shaft portion 160, and the front blade 170 are different from those of the above embodiment. The mounting table 150 has a height higher than that of the above embodiment and has a smaller outer shape. Two positioning holes 167 and two insertion holes 168 are formed on the upper surface of the rotating shaft portion 160 in place of the stopper fixing portion 162. The two positioning holes 167 are formed at an interval of approximately 180 degrees, and the two insertion holes 168 are formed at a position shifted from the two positioning holes 167 by approximately 90 degrees. In the front blade 170, the height of the part on the inner peripheral side is increased as compared with the case of the above-described embodiment in accordance with the height of the mounting table 150.

  In the inner pulsator 200, unlike the above-described embodiment, the first side surface 221 of the inner blade 220 faces counterclockwise, and the second side surface 222 faces clockwise. Moreover, the 3rd drain hole part 224 which consists of a some hole distribute | arranged to the up-down direction is formed in the upper surface of the inner blade | wing 220. FIG. Furthermore, the shape of the boss part 230 is different from that of the above embodiment. The vertical dimension of the boss portion 230 is made shorter than that in the above-described embodiment by the height of the mounting table 150. Further, a flange portion 233 is formed on the inner peripheral wall of the boss portion 230 at the upper portion. The step surface 234, the slit groove 235, and the engagement hole 236 are not formed on the inner peripheral wall of the boss portion 230.

  In this modified example, a stopper 350 is used instead of the stopper 300 of the above embodiment. The stopper 350 corresponds to the restricting portion of the present invention. Like the stopper 300, the stopper 350 functions as a rotation shaft that becomes the rotation center of the inner pulsator 200 together with the rotation shaft portion 160. The stopper 350 includes a disc-shaped top plate portion 351 and a peripheral wall portion 352 having a slightly smaller outer diameter than the top plate portion 351 depending from the outer peripheral edge of the top plate portion 351. An opening 353 is formed at the center of the top plate portion 351. Two positioning protrusions 354 are formed on the peripheral wall portion 352 at an interval of approximately 180 degrees. Furthermore, two mounting bosses 355 are formed on the peripheral wall portion 352 at positions that are shifted from the two positioning protrusions 354 by approximately 90 degrees. A mounting hole 356 is formed in the mounting boss 355.

  As shown in FIG. 25, the inner pulsator 200 is placed on the mounting part 110 of the outer pulsator 100 so that the boss part 230 is placed on the mounting table 150, and then the stopper 350 is attached to the rotating shaft part 160. At this time, the positioning protrusion 354 of the stopper 350 is inserted into the positioning hole 167 of the rotating shaft portion 160, and the mounting hole 356 of the stopper 350 is aligned with the insertion hole 168 of the rotating shaft portion 160. The screw 750 is fixed to the mounting hole 356 from the back side of the rotation shaft portion 160, and the stopper 350 is fixed to the rotation shaft portion 160. The top surface of the stopper 350 is substantially flush with the upper surface of the inner pulsator 200. When the outer peripheral portion of the top plate portion 351 of the stopper 350 overlaps above the flange portion 233 of the boss portion 230 and the inner pulsator 200 moves upward, the flange portion 233 contacts the outer peripheral portion of the top plate portion 351. Thus, the upward movement of the inner pulsator 200 is restricted by the stopper 350, and the inner pulsator 200 cannot be removed from the rotating shaft 160. A predetermined amount of gap S that allows the inner pulsator 200 to move upward is provided between the outer peripheral portion of the top plate portion 351 and the flange portion 233 of the boss portion 230 as in the above embodiment.

  In this modified example, the stopper 350 rotates together with the outer pulsator 100, so that a rotational speed difference is generated between the stopper 350 and the inner pulsator 200. Since the top surface of the stopper 350 is exposed in the laundry dewatering tub 22 through the opening 210 of the inner pulsator 200, the laundry comes into contact with the top surface of the stopper 350. For this reason, the movement of the laundry in contact with the pulsator 24 becomes more complicated than when a rotational speed difference occurs only between the outer pulsator 100 and the inner pulsator 200. Therefore, further improvement in cleaning performance can be expected.

  Note that blades extending radially from the opening 353 may be formed on the top surface of the stopper 350. In this way, since the water flow is generated or the laundry is rubbed by the blades of the stopper 350, the cleaning performance can be expected to be improved.

  Furthermore, in this modified example, in the inner pulsator 200, the second side surface 222 of the inner blade 220 receives a strong water flow due to the wall surface 121 of the outer blade 120 of the outer pulsator 100. Thereby, the inner pulsator 200 rotates well even in the clockwise direction where the water flow generated by the outer pulsator 100 is weak, and the laundry can be moved well.

  In this modification, a spacer 500 may be inserted between the inner pulsator 200 and the mounting table 150.

<Other changes>
In the above embodiment, the front blades 170 formed in the mounting portion 110 of the outer pulsator 100 are configured to extend from the mounting table 150 to the groove portion 140. However, the front blade 170 is not limited to the above-described shape, and may have a shape that does not extend to the groove 140, for example. In short, as long as a water flow can be generated in the internal space of the inner pulsator 200, the shape and number of the front blades 170 may be whatever.

  In the above embodiment, the back blade 240 of the inner pulsator 200 is formed on the back surface of the valley formed between the two inner blades 220. However, the back blades 240 may be formed at any position as long as they can receive the water flow generated in the internal space of the inner pulsator 200, and the number and shape of the back blades 240 may be any. For example, the reinforcing rib 237 formed on the outer peripheral wall of the lower cylindrical portion 232 of the boss portion 230 may be further extended outward so that the reinforcing rib 237 functions as a back blade that receives a water flow.

  In the above embodiment, considering the strength reduction of the outer pulsator 100, the second drain hole 173 is formed in the first compartment 171 of the mounting portion 110, and the water passage hole 174 is formed in the second compartment 172. The However, if the strength of the outer pulsator 100 can be sufficiently maintained, the second drain hole 173 and the water passage hole 174 may be formed in both the first compartment 171 and the second compartment 172.

  Although the fully automatic washing machine 1 of the said embodiment is not provided with the drying function, this invention can also be applied to the fully automatic washing machine provided with the drying function.

  In addition, the embodiment of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

20 Outer tank
22 Laundry dewatering tank
24 pulsator
30 Drive unit (drive unit)
31 Drive motor
32 Transmission mechanism
100 Outside pulsator (first pulsator)
120 outer blade
121 Precipice (first surface)
122 Inclined surface (second surface)
124 Projection
150 Mounting table (mounting unit)
160 Rotating shaft
200 Pulsator (second pulsator)
230 Boss
233 Buttocks
300 Stopper (Regulator)
350 Stopper (Regulator)
500 spacer
800 Silver ion elution member
802 Silver ion elution piece (Silver ion eluate)
810 Housing

Claims (5)

An outer tank,
A washing and dewatering tank rotatably disposed in the outer tub;
A pulsator rotatably disposed at the bottom of the washing and dewatering tank;
A drive unit that generates torque for driving the pulsator,
The pulsator is
A first pulsator that is rotated by the torque of the drive unit;
A second pulsator that is rotatably arranged on a mounting portion provided in the first pulsator;
A restriction part for restricting the upward movement of the second pulsator,
The second pulsator may have a contact portion corresponding to a previous SL regulating unit,
Wherein between the restricting portion and the contact portion, a predetermined amount of clearance to allow movement of the second pulsator is provided et al is in the vertical direction,
The first pulsator is provided with a plurality of blades on the outer peripheral side than the second pulsator,
The blade is
On the side facing one rotation direction of the blade, the first surface rises from the root of the blade to be perpendicular to the surface on which the first pulsator rotates,
On the side facing the other direction of rotation of the blade, there is a second surface that inclines so as to descend in the other direction of rotation, and the descending gradient decreases from the inner peripheral side to the outer peripheral side of the first pulsator. And
The drive unit is
A drive motor;
Torque of the drive motor is transmitted to the washing / dehydrating tub and the pulsator, and a band brake for braking the washing / dehydrating tub, and allowing the rotation of the washing / dehydrating tub in the tightening direction of the band brake are allowed. A transmission mechanism having a one-way clutch for preventing rotation of the washing and dewatering tub in the loosening direction,
The direction in which the first surface of the blade faces is the direction in which the rotation of the washing and dewatering tub is prevented by the one-way clutch.
A washing machine characterized by that. An outer tank,
A washing and dewatering tank rotatably disposed in the outer tub;
A pulsator rotatably disposed at the bottom of the washing and dewatering tank;
A drive unit that generates torque for driving the pulsator,
The pulsator is
A first pulsator that is rotated by the torque of the drive unit;
A second pulsator that is rotatably arranged on a mounting portion provided in the first pulsator;
A restriction part for restricting the upward movement of the second pulsator,
The second pulsator has a contact portion that hits the restricting portion,
Between the restricting portion and the contact portion, a predetermined amount of gap that allows the second pulsator to move is provided in the vertical direction,
The mounting portion is provided with a rotating shaft portion protruding upward, and the restricting portion is fixed on the rotating shaft portion,
In the central part of the second pulsator, a boss part inserted into the rotary shaft part is formed, and the contact part is formed in the boss part,
The second pulsator has an opening above the boss,
With the boss portion inserted into the rotating shaft portion, the top surface of the restricting portion fixed to the rotating shaft portion is exposed in the washing and dewatering tub through the opening.
A washing machine characterized by that. The washing machine according to claim 1 ,
The blade is formed with a protrusion protruding from the top of the blade.
A washing machine characterized by that. In the washing machine according to any one of claims 1 to 3 ,
A spacer is provided between the placing portion and the second pulsator;
The second pulsator slides on the spacer;
A washing machine characterized by that. In the washing machine according to any one of claims 1 to 4 ,
The second pulsator is provided with an accommodating portion for accommodating a silver ion eluting body that elutes silver ions by contact with water.
A washing machine characterized by that.

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