JP2004321629A - Agitation blade of washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agitation blade of a washing machine for forming complicated streams inside a washing tub and improving washing performance for objects to be washed. <P>SOLUTION: The agitation blade 1 is constituted so that an outer peripheral blade 2 having the largest area, for which large outer peripheral vanes 22 are formed at the outer peripheral part of a disk, and a center blade 4 for which center vanes 24 are formed on a semispherical surface at a rotation center part are integrally formed, and an intermediate blade 3 where intermediate vanes 23 are formed is freely rotatably fitted inside a recessed part formed between the center blade 4 and the outer peripheral blade 2. When the outer peripheral blade 2 and the center blade 4 are rotationally driven by a rotary shaft connected to the lower part of the center blade 4, since the intermediate blade 3 is rotated following the rotation, the complicated streams are generated, frictions of clothes with each other, twists and vertical movement of the objects to be washed are caused and they are effectively washed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a stirring blade of a washing machine which is disposed at an inner bottom of a washing tub and stirs laundry and water by rotation.
[0002]
[Prior art]
In a two-tub washing machine in which a washing tub and a dewatering tub are separately provided, and in a spiral washing machine such as a fully automatic washing machine in which the washing tub also functions as a dehydration tub, the inner bottom of the washing tub is rotated by a motor. A stirring blade is provided, and the rotation of the stirring blade generates a swirling agitated water flow in the washing tub, and the washing object is agitated with water to perform washing and rinsing operations.
[0003]
The stirring blade is required to have an excellent cleaning effect and not to cause kinks or damages on the laundry, and the disk-shaped base shape and the shape of the radial mountain formed thereon are devised. . For example, in a radial direction on a base having a curved surface that descends from a hemispherical portion provided at the center of a circle and rises outward, the heights and widths of a plurality of mountains formed are closer to the center and to the outer periphery. There is known a stirring blade of a washing machine in which the action of hooking and rotating the laundry at the tip of the mountain is reduced in a different manner, and the washing performance is improved by suppressing uneven washing, kinking, entanglement, etc. (Patent) Reference 1).
[0004]
[Patent Document 1]
Japanese Patent Publication No. 2-54113 (pages 2-3, Fig. 3)
[0005]
[Problems to be solved by the invention]
Giving the washing effect to the laundry is a synergistic effect between the effect of the water flow generated by the rotation of the stirring blade and the effect of the mountain provided on the stirring blade directly moving the laundry. In the structure of the stirring blade according to the related art, when the stirring blade rotates, water that has entered from the central hemisphere portion flows along a curved surface, rises outside, and rises along the wall surface of the washing tub. Drawing an arc-shaped water flow, however, by simply devising the shape of the base and the mountain constituting the stirring blade, the stirring water flow generated in the washing tub becomes a simple flow, and there is a limit to the stirring ability of the laundry.
[0006]
An object of the present invention is to provide a stirring blade of a washing machine in which a plurality of rotating blades are integrally combined to form a complicated water flow to improve the stirring ability.
[0007]
[Means for Solving the Problems]
The present invention for achieving the above object is a stirring blade of a washing machine that is disposed at an inner bottom of a washing tub that opens upward and stores laundry and water, and is rotationally driven by rotation driving means. A central wing formed with a plurality of central blades formed outwardly from the center of rotation within a predetermined radial distance and protruding upward, and a plurality of outer peripheral blades formed within a predetermined radial distance inwardly from the outer periphery and protruding upward; Are formed, and an intermediate wing is formed between the center wing and the outer wing and is rotatably fitted therein and formed with a plurality of intermediate wings projecting upward.
[0008]
According to the above configuration, since the intermediate wing is inserted between the central wing and the outer peripheral wing, when the central wing and the outer peripheral wing are driven to rotate, the intermediate wing is delayed in rotation of the central wing and the outer peripheral wing. Rotation occurs, a water flow is generated by the intermediate wings in addition to the water flow generated by the outer wing and the center wing, and the water flows are complicated by interacting with each other, causing complicated movement of the laundry and friction between cloths. As a result, the agitation power increases, and the cleaning performance can be improved.
[0009]
In the above configuration, the diameters of the outer peripheral wing, the intermediate wing, and the center wing in the diametrical direction can be increased by forming the intermediate wing approximately の of the outer wing and the central wing approximately １ ／ of the intermediate wing. A large water flow is formed in the rotation direction by the outer peripheral wings, and a small water flow in the center by the central wing changes the water flow by the intermediate wings into a complicated water flow, and the laundry to be stored in the washing tub is evenly stirred. .
[0010]
Further, by integrally forming the central wing and the outer peripheral wing, the strength by the integral structure can be secured, and the structure in which the intermediate wing is disposed therebetween can be easily formed.
[0011]
In addition, the center wing is formed in a hemispherical shape with the center of rotation as the top, which generates a water flow that flows in the outer peripheral direction and acts on the water flow by the middle wing to improve the effect of stirring the laundry by a complicated water flow. Can be done.
[0012]
In addition, the intermediate wing is formed on an inclined curved surface that rises toward the outer peripheral direction, whereby a water flow closer to the vertical direction is obtained, and the flow of the central wing acts on the water flow, so that a flow is generated in an oblique direction. Washing power can be improved by applying a complicated agitation force to the laundry and a force in a friction or twisting direction.
[0013]
Further, the outer wing is formed on a curved surface which descends toward the substantially central portion in the radial direction with the inner peripheral side as a top and rises toward the outer periphery, so that the laundry can be easily put on the outer peripheral wing and the laundry can be washed. In addition to effective stirring, a water flow in the rotational direction is likely to be generated.
[0014]
Further, by forming the intermediate wing so that the maximum height position of the intermediate blade is lower than the maximum height position of the center blade and the outer peripheral blade, the object to be washed placed between the outer peripheral wing and the center wing is formed. And the intermediate wing is prevented from rotating together with the outer peripheral wing and the center wing by being pulled by the wing, and damage due to a large stress acting on the intermediate wing can be suppressed.
[0015]
Further, the intermediate wing engages with a slide pedestal fixed in an intermediate wing accommodating recess formed between the center wing and the outer wing, and is mounted on a slide support formed on the slide pedestal. When the center wing and the outer peripheral wing are integrally formed by supporting rotatably, the intermediate wing accommodating recess is formed at the same time, and the sliding pedestal that supports the rotation of the intermediate wing is fixed there. Is obtained.
[0016]
The intermediate wing supported on the slide receiving pedestal includes a pair of concentric rings facing each other at a small distance from both sides of the sliding support portion, and a sliding protrusion sliding on the upper surface of the sliding support portion. By forming, an air pocket is formed on the sliding support portion where water hardly intrudes, sand and the like hardly enter the sliding surface together with the water, and the intrusion of foreign matter that hinders rotation of the intermediate wing is prevented. The effect is obtained.
[0017]
In addition, by forming an opening in the bottom surface of the intermediate wing accommodating recess, foreign matter such as sand entering the intermediate wing accommodating recess is discharged from the opening, so that the foreign matter may hinder rotation of the intermediate wing. Can be prevented.
[0018]
In addition, by forming a step on the side peripheral surface of the intermediate wing accommodating recess, foreign matter such as a coin enters the intermediate wing accommodating recess from a gap between the intermediate wing and the central wing or a gap between the intermediate wing and the outer wing. Can be prevented.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to facilitate understanding of the present invention. Note that the present embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
[0020]
FIG. 1 shows the configuration of a washing machine to which the stirring blade 1 according to the present embodiment is applied, and shows an example in which the washing machine is configured as a fully automatic washing machine that automatically performs everything from washing to spinning. The outer tub 12 disposed in the housing 10 is elastically supported by a plurality of suspensions 11 so that vibrations during dehydration can be absorbed by the suspensions 11. Inside the outer tub 12, an inner tub (washing tub) 13 having the stirring blades 1 disposed on the inner bottom is provided. The stirring wings 1 and the inner tub 13 are connected to a motor 14 attached to the bottom of the outer tub 12. Are switched individually by the clutch 15 so that they are individually driven to rotate. In addition, the configuration of water supply and drainage is not shown.
[0021]
When the lid 16 provided on the upper surface of the housing 10 is opened and laundry and detergent are put into the inner tub 13 and operation is started, water is supplied into the inner tub 13 and the stirring blade 1 is rotated by the motor 14. The washing process is performed by being driven and stirring the water flow and the laundry by the rotation of the stirring blade 1. After the washing step for a predetermined time, the soiled water after washing is drained, and a rinsing step of stirring the newly supplied water and the article to be washed by the stirring blade 1 is performed. When the rinsing process is completed, the rotation of the motor 14 is switched to the inner tub 13 by the clutch 15, and the inner tub 13 is driven to rotate, so that water contained in the laundry is centrifugally applied to the peripheral surface of the inner tub 13. A dewatering step of discharging the formed small holes into the outer tub 12 is performed. A series of steps from the washing to the dehydration are controlled by a control device (not shown), and are executed automatically.
[0022]
In the above-mentioned washing step and rinsing step, the formation of the water flow by the stirring blade 1 and the stirring of the laundry are requirements that affect the washing performance. The stirring blade 1 according to the present embodiment forms a complicated water flow in the inner tub 13 and improves the cleaning performance by stirring which increases the frictional force between the laundry objects. Hereinafter, the structure of the stirring blade 1 will be described with reference to FIGS.
[0023]
As shown in FIGS. 2 and 3, the stirring blade 1 includes an outer peripheral blade 2 having a large area on the outer peripheral part, a central blade 4 formed on the central part with a small area, and an outer peripheral blade 2 and a central blade 4. It is formed in three parts with an intermediate wing 3 disposed therebetween. As shown in FIG. 4, the outer peripheral wing 2 and the center wing 4 are configured as a driving body 20 integrally formed by resin molding, and the fitting shaft 6 formed below the center wing 4 is connected to the clutch 15. The motor 14 is rotationally driven by being inserted into a rotating shaft to which the rotational driving force of the motor 14 is transmitted. An intermediate wing accommodating recess 7 is formed between the outer peripheral wing 2 and the center wing 4 of the driving body 20, and a slide receiving table 5 is provided in the intermediate wing accommodating recess 7 as shown in FIG. 3. Then, it is fixed to the driving body 20 by screws 9 screwed from a plurality of locations on the lower surface of the intermediate wing housing recess 7. The intermediate wing 3 is rotatably fitted on the slide receiving table 5.
[0024]
As shown in FIG. 5, the slide receiving base 5 has a U-shaped cross section formed on the outer peripheral side to support the mounted intermediate wing 3, and an intermediate formed on the inner peripheral side. An engagement ring portion 5b is formed to engage with an engagement hook 3a formed on the wing 3. When the intermediate wing 3 is press-fitted into the slide receiving base 5 fixed on the driving body 20, as shown in FIG. 3, a pair of concentric rings 3b and 3c formed on the lower surface of the intermediate wing 3 are connected to the support ring. The sliding protrusion 3d formed between the concentric rings 3b and 3c is located on both sides of the portion 5a with a small gap therebetween, and abuts on the support ring portion 5a. It is rotatably supported above. The engaging hook 3a provided on the intermediate wing 3 is engaged with the engaging ring portion 5b of the sliding pedestal 5 so that the hook-shaped portion engages with the intermediate wing 3 fitted into the sliding pedestal 5. Is kept in a state where it does not come off.
[0025]
The upper surface of the support ring 5a on which the intermediate wing 3 slides and rotates is formed by a pair of concentric rings 3b and 3c on the upper surface of the support ring 5a with a small gap due to the fitting structure of the intermediate wing 3 into the slide receiving table 5. Because of the enclosure, an air trap effect is exerted, sand and the like do not enter the sliding surface, and no trouble occurs in the sliding rotation of the intermediate wing 3. In addition, foreign matter such as sand that has entered the intermediate wing accommodating recess 7 from a gap between the intermediate wing 3 and the outer peripheral wing 2 is discharged from the opening 7 a formed on the bottom surface of the intermediate wing accommodating recess 7. The rotation of the intermediate wing 3 is prevented from being hindered by the bite of sand or the like. In addition, a step is formed on both inner peripheral surfaces of the intermediate wing accommodating recess 7, and a convex peripheral portion 7b is formed on the inner peripheral side of the step. The combination of the portions 3e and 3f prevents foreign matter such as coins from entering the gaps between the intermediate wing 3, the outer wing 2, and the center wing 4.
[0026]
The outer peripheral wing 2, the intermediate wing 3, and the central wing 4 are each formed on a unique inclined curved surface, and a plurality of blades 22, 23, and 24 protruding upward are formed on the curved surface. The intermediate wing 3 is formed to be approximately １ ／ of the outer peripheral wing 2, and the central wing 4 is formed to be approximately の of the intermediate wing 3. As shown in FIG. 3, the center wing 4 is formed as a convex curved surface gently descending with the rotation center at the top, and the central blade 24 is formed on the descending slope of the curved surface. The intermediate wing 3 is formed as a concave curved surface in which a horizontal plane continuing to the descending inclined surface of the central wing 4 rises toward the outer peripheral direction, and the intermediate blade 23 protrudes from the curved surface. The outer peripheral wing 2 is formed as a concave curved surface which descends with an inner peripheral portion continuing to the rising inclined surface of the intermediate wing 3 as a top, and gradually rises toward the outer peripheral direction, and a large outer peripheral blade 22 protrudes from the curved surface. ing.
[0027]
When the stirring blade 1 having the above configuration is driven to rotate, a large rotating water flow is generated in the horizontal direction by the outer peripheral blade 2 having the largest area and the large outer peripheral blade 22 formed thereon. The center wing 4 rotating simultaneously with the outer wing 2 generates a small rotating water flow directed outward from the central portion. Since no driving force is applied to the intermediate wing 3 and water and resistance to the laundry are added, the intermediate wing 3 rotates with a delay from the rotation of the outer wing 2 and the center wing 4 to generate a vertical water flow. It is pushed by the water flow facing outward and becomes an oblique water flow. As described above, since the three blades generate the water flow, and the rotation of the intermediate wing 3 is delayed, a complicated water flow is generated in the inner tub 13, and the laundry is mixed with each other by complicated stirring. The frictional force is increased, and the dirt is easily removed by the twisting direction or the vertical movement.
[0028]
The intermediate blade 23 formed on the intermediate wing 3 is located at a position lower than the outer peripheral blade 22 and the center blade 24, and the intermediate wing 3 is moved by the laundry to be hooked and moved by the outer blade 22 and the center blade 24. Interlocking with the central wing 4 is suppressed, and a reduction in the action of the intermediate wing 3 is prevented, and a large stress is applied to the intermediate wing 3.
[0029]
Further, between the plurality of outer blades 22 formed on the outer blade 2, inter-blade protrusions 25 are formed, and a frictional force between the laundry placed on the concave portion between the outer blades 22 and the outer blade 2 is formed. Therefore, the effect of stirring the laundry by the outer peripheral wing 2 can be improved.
[0030]
The embodiment described above shows an example in which the stirring blade according to the present invention is applied to a fully automatic washing machine.However, a washing and drying machine having a drying function in a fully automatic washing machine, and a washing tub and a dewatering tub are separately provided. The same effect can be obtained even when applied to the provided two-tub washing machine.
[0031]
【The invention's effect】
As described above, according to the stirring blade of the washing machine according to the present invention, three stirring portions of the center blade, the outer peripheral blade, and the intermediate blade disposed therebetween are formed. When the outer wing is driven to rotate, a rotation that is delayed from the rotation of the center wing and the outer wing occurs, and a water flow is generated by the intermediate wing in addition to the water flow generated by the outer wing and the center wing. The water flow becomes complicated, causing complicated movements of the laundry, thereby increasing the friction between the cloths, increasing the stirring power, and improving the cleaning performance.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a configuration of a washing machine to which a stirring blade according to an embodiment is applied.
FIG. 2 is a plan view showing a configuration of a stirring blade.
FIG. 3 is a cross-sectional view of the stirring blade taken along line AA of FIG.
FIG. 4A is a plan view showing the configuration of a driving body constituting a stirring blade, and FIG. 4B is a cross-sectional view taken along line BB.
5A is a plan view showing a configuration of a slide receiving table, and FIG. 5B is a cross-sectional view taken along line CC.
6A is a plan view showing a configuration of an intermediate wing, and FIG. 6B is a cross-sectional view taken along line DD.
[Explanation of ears]
DESCRIPTION OF SYMBOLS 1 Stirrer blade 2 Outer peripheral blade 3 Intermediate blade 3a Engagement hook part 3b, 3c Concentric ring part 3d Sliding protrusion 4 Center blade 5 Sliding pedestal 5a Support ring part 5b Engagement ring part 7 Intermediate blade accommodation recess 13 Inner tank ( Washing tub)
14 Motor 22 Outer peripheral blade 23 Intermediate blade 24 Central blade 25 Inter-blade protrusion

Claims (11)

A stirring blade of a washing machine which is disposed at an inner bottom of a washing tub which is opened upward and stores laundry and water, and is rotationally driven by a rotational driving means, wherein the stirring blade is a predetermined radial distance outward from a rotation center of the disk. A central wing having a plurality of central blades formed therein and projecting upward, and an outer peripheral wing having a plurality of outer peripheral blades formed within a predetermined radial distance inward from the outer periphery of the disk and projecting upward. And an intermediate blade formed with a plurality of intermediate blades that are rotatably fitted between the center blade and the outer peripheral blade and that protrude upward. The washing machine according to claim 1, wherein each of the outer peripheral wing, the intermediate wing, and the central wing has a width in a diameter direction substantially equal to 1/2 of the outer peripheral wing, and the central wing to be approximately 1/2 of the intermediate wing. Stirring blades. The stirring blade of a washing machine according to claim 1 or 2, wherein the central blade and the outer peripheral blade are integrally formed. The agitating blade of a washing machine according to claim 1 or 2, wherein the central blade is formed in a hemispherical shape with the rotation center at the top. The agitating blade of the washing machine according to claim 1 or 2, wherein the intermediate blade is formed on a slope that rises toward an outer peripheral direction. The agitating blade of a washing machine according to claim 1 or 2, wherein the outer peripheral blade is formed to have a curved surface which descends toward a substantially central portion in a radial direction with the inner peripheral side as a top and rises toward an outer peripheral. The agitating blade of a washing machine according to claim 1 or 2, wherein the intermediate blade is formed such that a maximum height position of the intermediate blade is lower than a maximum height position of the center blade and the outer peripheral blade. The intermediate wing engages with a slide cradle fixed in an intermediate wing accommodating recess formed between the center wing and the outer wing, and is rotatable on a slide support formed on the slide cradle. The stirring blade of the washing machine according to claim 1, which is supported by the washing machine. 9. The intermediate wing according to claim 8, wherein a pair of concentric rings facing the both side surfaces of the sliding support portion with a small gap therebetween and a sliding protrusion sliding on the upper surface of the sliding support portion are formed. Washing machine stirring blades. The agitating blade of a washing machine according to claim 8, wherein an opening is formed in a bottom surface of the intermediate blade housing recess. The agitating blade of a washing machine according to claim 8, wherein a step is formed on a side peripheral surface of the intermediate blade accommodating recess.

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