WO2002095118A1

WO2002095118A1 - Pulsator with agitator for washing machine

Info

Publication number: WO2002095118A1
Application number: PCT/KR2002/000913
Authority: WO
Inventors: Dong In Lee
Original assignee: Dong In Lee
Priority date: 2001-05-18
Filing date: 2002-05-15
Publication date: 2002-11-28
Also published as: KR100363910B1; KR20010069915A

Abstract

The present invention relates to a pulsator for a washing machine having an agitator. More particularly, the invention relates to a pulsator for the washing machine having an agitator in which the washing pole is eccentrically rotated around the center of the washing container to increase the rotation force of laundry, in which the washing pole gives directly to an impact energy to the laundry to improve the washing ability and in which the washing pole periodically passes through the center of the drhydration container to prevent lump of the laundry. An object of the present invention is to provide a pulsator for the washing machine having an agitator in which a washing pole is eccentrically rotated at the center of a dehydration container, so that a pulsator is not rotated at high speed, the rotating force of the laundry is increased and lump of the laundry can be prevented.

Description

PULSATOR WITH AGITATOR FOR WASHING MACHINE

BACKGROUND OF THE INVENTION

Field of the Invention:

The invention relates generally to a pulsator for the washing machine having an agitator. More particularly, the invention relates to a pulsator for the washing machine having an agitator in which the washing pole is eccentrically rotated around the center of the washing container to increase the rotation force of laundry, in which the washing pole gives directly to an impact energy to the laundry to improve the washing ability and in which the washing pole periodically passes through the center of he dehydration container to prevent lump o the laundry.

Description of the Prior Art: The washing machines are mainly classified into a pulsator washing machine in which the pulsator installed below the washing container is rotated to transfer the kinetic energy to the laundry, and a drum washing machine in which the cylindrical drum rotating horizontally applies the kinetic energy to tifcte laundry.

Fig. 1 is a cross-sectional view of a conventional pulsator washing machine 100. As shown in Fig. 1, the washing machine 100 includes a washing container (exterior container) 1 having a washing case 200 for containing the laundry water. A dehydration container (interior container) 2 of a double structure for containing the laundry is installed within the washing container 1. At this time, the dehydration container 2 is rotated within the washing container 1. A motor 3 being a driving source is mounted within the washing machine case. A clutch section 4 having a belt is driven by the driving force of the motor 4 and is mounted at the bottom central line of he washing container 1. Further, a pulsator 5 at an internal bottom ofthe dehydration container 2 is coupled on an output axis 6 of the clutch section 4. A vibration prevention device such as a damper, etc. for absorbing vibration from the washing container is installed at the bottom outer circumference of the washing container 1. In this type of the washing machine, if the motor 3 installed within the washing machine is driven by a start command from a user, the motor 3 is driven alternately in a counterclockwise direction. The driving force from the motor 3 is transferred to the clutch section 4 by means of the belt. The pulsator 5 installed at the axis 6 ofthe clutch section is thus rotated to perform a laundry.

Meanwhile, it can be seen that the pulsator 5 has a plurality of rotating wings 7 symmetrically right and left, as shown in Fig. 2. Thus, when the pulsator 5 is rotated right and left, a heart water flow 8 is formed within the dehydration container 2. At this time, the heart water flow 8 upwardly moves along the sidewall from both sides ofthe bottom of the dehydration container 2 and then moves toward the central section of the washing machine, as shown in Fig. 1. However, this flow gathers together the laundry toward the central portion ofthe washing machine, so that the laundry located at the central portion of the dehydration container 2 is continuously concentrated on the central portion ofthe dehydration container 2 and the laundry located at an exterior portion of the dehydration container 2 is continuously concentrated an the exterior portion of the dehydration container 2. Due to this, there are problems that the washing force ofthe laundry at the central portion ofthe dehydration container 2 is degraded and the laundry at the exterior portion ofthe dehydration container 2 is worn by friction with the dehydration container 2.

Therefore, in order to prevent the above problems, a washing pole 9 is installed at the center ofthe pulsator 5 to prevent lump ofthe laundry, as shown in Fig. 3. However, this effect is tiny.

In addition, in the pulsator washing machine in which the rotating force by the output axis 6 of the clutch section is transferred to the laundry water and the laundry by means ofthe pulsator, the rotating force is transferred by the pulsator 5 of a plain structure. Due to this, in case that a lot ofthe laundry is inserted into the dehydration container 2, the rotating force by the pulsator 5 is not properly transferred to the laundry. Thus, there is a problem that the laundry at an upper side ofthe dehydration container 2 is rarely rotated even when the pulsator 5 is rotated.

There are problems that the pulsator is rotated at excessively high speed and the laundry neighboring to the pulsator is damaged due to friction by a rapid rotation of the pulsator, in order to overcome this non-transmission of the rotating force and smoothly rotate the lumped laundry. In order to solve these problems, the rotating wings 7 having various shapes are mounted to the pulsator 5. The effect of this method, however, is ting when lots of the laundry is inserted.

SUMMARY OF THE INVENTION The present invention is contrived to solve the above problems and an object ofthe present invention is to provide a pulsator for the washing machine having an agitator in which a washing pole is eccentrically rotated at the center of a dehydration container, so that a pulsator is not rotated at high speed, the rotating force ofthe laundry is increased and lump ofthe laundry can be prevented. In order to accomplish the above object, a pulsator for the washing machine having an agitator according to the present invention, is characterized in that it comprises a pulsator body 20a in which an axis insertion hole 16 passing through an output axis ofthe clutch section is formed at the center of the pulsator body 20a; a first plain gear 11a mounted at an end of the output axis 6 of the clutch section passed through the axis insertion hole 16; a second plain gear 12a a rotating axis of which is separated from the axis insertion hole and mounted to the pulsator body and to which a dog 10 is mounted; a stopper 15a mounted to the pulsator body 20a, for limiting the rotating angle ofthe second plain gear along with the dog 10; a rotating arm 13 having a length same to the distance between the center ofthe second plain gear and the axis insertion hole, wherein a rotating axis integrally mounted to the center ofthe second plain gear at one end and a washing pole 14 is vertically mounted on an upper side at the other end so that the movement trace ofthe washing pole 14 can pass through a vertical upward direction ofthe axis insertion hole; and a pulsator cover 21 having a hollow at its center, a through hole ofthe rotating axis ofthe rotating arm formed the vertical upward direction ofthe center ofthe second plain gear, for covering the pulsator body.

BRIEF DESCRIPTION OF THE DRAWINGS

The aforementioned aspects and other features of the present invention will be explained in the following description, taken in conjunction with the accompanying drawings, wherein: Fig. 1 is a cross-sectional view of a conventional pulsator washing machine;

Fig. 2 is a perspective view of a pulsator in a conventional washing machine; Fig. 3 is a perspective view ofthe pulsator washing machine having a conventional washing pole;

Fig. 4 is a dismantled view of a pulsator for the washing machine according to one embodiment ofthe present invention;

Fig. 5 is a perspective view ofthe pulsator for the washing machine according to another embodiment ofthe present invention;

Fig. 6(A) to Fig. 6(D) are operation charts ofthe pulsator for the washing machine according to one embodiment ofthe present invention; Fig. 7(A) to Fig. 7(D) are operation charts ofthe pulsator for the washing machine according to another embodiment ofthe present invention; Fig. 8 is a cross-sectional view of he pulsator for the washing machine according to one embodiment ofthe present invention;

Fig. 9 is a dismantled view ofthe pulsator for the washing machine according to another embocliment ofthe present invention; Fig. 10 is a perspective view ofthe pulsator for the washing machine according to still another embodiment ofthe present invention; and

Fig. 11 is a cross-sectional view ofthe pulsator for the washing machine according to still another embodiment ofthe present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The present invention will be described in detail by way of a preferred embodiment with reference to accompanying drawings, in which like reference numerals are used to identify the same or similar parts.

Fig. 4 is shows a dismantled structure of a pulsator for the washing machine having an agitator according to one embodiment ofthe present invention.

In case ofthe conventional pulsator 5, the pulsator 5 is integrally coupled to the end of he output axis 6 ofthe clutch section so that the pulsator 5 can be rotated as the output axis 6 is rotated. In the pulsator for the washing machine having an agitator, as shown in Fig. 4, an axis insertion hole 16 passing through the output axis of the clutch section is formed at the central portion of a pulsator body 20a. Further, a supporting means 17 such as ball bearings or bushings for supporting a pulsator body 20 is inserted between the axis insertion hole 16 and the output axis 6, so that the pulsator body 21a can independently move along with the output axis 6 passed through the axis insertion hole 16.

In addition, a first plain gear 1 la is mounted at the end ofthe output axis 6 ofthe clutch section passed through the axis insertion hole 16. The second plain gear 12a is integrally mounted on an upper side ofthe second plain gear 12a that is mated with the first plain gear 11a. A rotating axis 13a in a rotating arm 13 that performs the same rotation movement to the second plain gear 12a is also mounted. In addition, a washing pole 14 is vertically mounted on the end of an opposite side ofthe rotating arm 13. At this time, the length ofthe rotating arm 13 is determined so that the washing pole 14 passes through an upper vertical direction of the center of the first plain gear. The rotating axis of the second plain gear 12a is eccentrically located from the center of the pulsator body 20a. The rotating axis ofthe plain gear 12a is supported by a supporting means such as a bearing so that the second plain gear 12a can perform a rotating movement.

Further, a dog 10 for limiting the rotating angle of the second plain gear 12a is installed on the gear tooth ofthe second plain gear 12a at an opposite direction in which the washing pole 14 is mounted. A stopper 15a for limiting the rotating movement of the second plain gear 12a to a given range along with the dog 10 is mounted in the pulsator body 20a. These components are finally covered by a pulsator cover 21. At thins time, a hollow through which the Ijbdng pin 31 can pass is formed in the pulsator cover 21. Further, a through hole through which the rotating axis 13a in the rotating arm 13 passes is formed vertically to an upper central portion ofthe second plain gear 12a. Therefore, the pulsator ofthe present invention has the pulsator cover 21 covering the pulsator body 20a of a circular shape, and the rotating arm 13 and the washing pole 14 that are mounted on the cover 21, as shown in Fig. 5. As such, the first plain gear 11a rotates independently from the pulsator body 20a and the rotating axis of he second plain gear 12a moves together the pulsator body 20a. However, while the second plain gear 12a is rotated independently from the pulsator body 20a but rotated in conjunction with the first plain gear 11a. In addition, the rotating angle ofthe second plain gear 12a limited by the dog 10 mounted in the second plain gear and the stopper 15a mounted on the pulsator body 20a. Therefore, the rotating force transferred from the output axis 6 ofthe clutch section to the first plain gear 1 la is transferred to the second plain gear 12a. The second plain gear 12a is then rotated until it is impossible to rated by means ofthe stopper 15a. Next, the rotating force is transferred to the pulsator body 20a via the rotating axis ofthe second plain gear 12a, so that the pulsator body 20a is rotated. At this time, the stopper 15a made of a resilient member functions to minimize shock and vibration occurring at the time when rotation of the second plain gear 12a is stopped.

The operation principle ofthe pulsator according to the present invention will be described by reference to Fig. 6(A) to Fig. 6(D). First, a user gives a start command. The motor 3 installed within the washing machine is then driven alternately in a regular direction and a reverse direction. The driving force ofthe motor 3 is transferred to the clutch section 4 by means of a belt, by which the first plain gear 11a installed at the output axis 6 ofthe clutch section rotates in a regular direction and a reverse direction. In other words, when the first plain gear 11a mounted as shown in Fig. 6(A) is rotated in a counterclockwise direction, the second plain gear 12a is rotated in a clockwise direction with the pulsator body 20a stopped, and the rotating arm 13 and the washing pole 14 that are integrally coupled to the second plain gear 12a rotate in a clockwise direction around the rotating axis of the second plain gear 12a, as shown in Fig. 6(B).

As shown in Fig. 6(C), the second plain gear 12a is rotated by a given angle. The second plain gear 12a is then stopped by the dog 10 and the stopper 15a. If the second plain gear 12a could no longer rotate around its rotating axis, the second plain gear 12a, the rotating arm 13 and the washing pole 14 are rotated in the same counterclockwise direction to the first plain gear 1 la along with the pulsator body 20a, as shown in Fig. 6(D).

If the motor 3 ofthe washing machine is rotated in a counterclockwise direction, tiie rotating arm 13 and the washing pole 14 are rotated and the pulsator body 20a is also rotated by the same principle.

Further, in order to prevent formation of washing waste, etc. at the gap between the rotating arm 13 and the pulsator cover 21 when the rotating arm 13 is rotated on the pulsator cover 21, a plurality of protrusions 24 are formed below the rotating arm 13. The guiding groove 25 of a concentric circle into which the protrusions 24 is inserted at a position corresponding to the protrusions 24 on the pulsator cover 21 is formed around the rotating axis 14a of the rotating arm 13. The protrusions 24 and the guiding groove 25 serve to prevent malfunction due to the washing waster, etc. and also to guide the rotation movement of the rotating arm 13 and the washing pole 14 while supporting them. As such, the washing pole 14 on the rotating arm 13 is rotated within a certain area before the rotating direction of the pulsator body 20a is changed. At this time, the washing pole 14 unbinds the laundry lumped at the center of the dehydration container while passing through the center of the pulsator and simultaneously directly applies a shock energy to the laundry to increase the washmg capability. Also, the final stop location of the washing pole 14 is a location made eccentric from the center ofthe pulsator by a given distance. The washing pole 14 is rotated along with the pulsator body 20a with such eccentric state. In a prior art, the rotating force of the pulsator is transferred to the wash water and the laundry by the pulsator of a plain shape. In the present invention, however, the laundry is directly rotated by a three-dimensionally protruded washing pole 14. Therefore, in case that excessive laundry is inserted into the dehydration container 2, the rotating force is fully transferred to the laundry, thus increasing the washing capability. In other words, the washing capability is increased even with a low speed rotation of the pulsator without excessive high-speed rotation. As a result, abrasion of he laundry can be significantly reduced. The pulsator for the washing machine having the agitator according to another embodiment ofthe present invention is characterized in that the rotating axis is mounted to the pulsator body so that the rotating axis is symmetric to the rotating axis ofthe second plain gear against the axis insertion hole, whereby the rotating axis is mated with the first plain gear and a balancing body balancing with the washing pole at a location to which the washing pole is symmetric includes a third plain gear. In other words, in order to solve vibration and noise occurring when the washing pole is eccentrically rotated on the pulsator, the balancing body for balancing the output axis ofthe clutch section is further included.

The operation principle ofthe pulsator according to the present invention will be below described by reference to Fig. 7(A) to Fig. 7(D). As in the above embodiment, the driving force ofthe motor 3 is transferred to the clutch section 4 via the belt so that the first plain gear 1 la installed at the output axis 6 of the clutch section is rotated in a regular direction and a reverse direction. In other words, as shown in Fig. 7(A), if the first plain gear 1 la is rotated in a counterclockwise direction, the second plain gear 12a and the third plain gear 40 are rotated in a clockwise direction with the pulsator body 20a stopped, and the rotating arm 13 and the washing pole 14 that are integrally coupled to the second plain gear 12a are rotated in a clockwise direction around the rotating axis ofthe second plain gear 12a, as shown in Fig. 7(B). At this time, the balancing body 41 inserted into the third plain gear 40 is also rotated in a clockwise direction. As shown in Fig. 7(C), the second plain gear 12a is rotated by a given angle and is then stopped by the dog 10 and the stopper 15a. The balancing body 41 inserted into the third plain gear 40 is stopped at a location symmetric to the washing pole 14. If the second plain gear 12a no longer rotated around its rotating axis, the third plain gear 40 into which the second plain gear 12a, the rotating arm 13, the washing pole 14 and the balancing body 41 are inserted are rotated in the same counterclockwise direction to the first plain gear 11a along with the pulsator body 20a, as shown in Fig. 7(D).

At this time, the weight of the third plain gear 40 is balancing with that of the second plain gear 12a and the stopper 15a. The weight and insertion location of the balancing body 41 are determined so that they can balance with the washing pole 14 and the rotating arm 13. At the final stop location ofthe balancing body, the number ofthe tooth ofthe third plain gear is determined to balance with the washing pole 14 and the rotating arm 13. Therefore, the balancing body 41 is located at a location where the weight ofthe washing pole 14 and the rotating arm 13 is balanced. If the motor 3 of the washing machine is rotated in a counterclockwise direction, the rotating arm 13 and the washing pole 14 are rotated and the third plain gear 40 are rotated by the same principle. The balancing body 41 is also located at a location where the weight ofthe washing pole 14 and the rotating arm 13 is balanced.

The pulsator for the washing machine having the agitator according to another embodiment ofthe present invention is characterized in that a rotating axis that is integrally mounted at the center of the third plain gear is included at one end of the pulsator, the second rotating arm in which the movement trace of the second washing pole vertically mounted on an upper side ofthe second movement trace at the other side ofthe pulsator has a length that does not pass through a vertical upper side of the axis insertion hole is included, and a through hole of the rotating axis of the second rotating arm is further formed at a vertical upper side ofthe center ofthe third plain gear in the pulsator cover.

In other words, as the second washing pole is additionally mounted, there is an advantage that the shock energy transferred to the laundry is increased and the washing capability is thus further increased. Further, as the kinetic energy of the pulsator is applied to the laundry by the two washing poles, the transfer efficiently ofthe kinetic energy is increased and a desired quality ofthe laundry can be obtained with a low speed rotation ofthe pulsator. At this time, in order for two washing poles not to collide with when they pass through the central portion ofthe pulsator, the length ofthe second rotating arm is made short. Thus, the length ofthe second washing pole is controlled not to pass through the center ofthe pulsator body.

The pulsator for the washing machine having the agitator according to another embodiment ofthe present invention is shown in Figs. 9 and 10.

The washing machine in which the driving force of the motor is passed to the pulsator via the output axis ofthe clutch section includes a pulsator body 20b having an axis insertion hole 16 through which the output axis ofthe clutch section is passed at its center and slots 23 at both sides ofthe axis insertion hole 16; a stopper 15b installed below the pulsator body 20b at both sides of each ofthe slots 23; a sliding bar 18 supported to the stopper .and mounted below the pulsator body; a pinion gear 1 lb mounted at an end ofthe output axis of the clutch section passed through the axis insertion hole; a rack gear 12b mated with the pinion gear lib; and an upper pulsator 22 on a lower side of which the slider 19 the rack gear 12b is straightly moving in accordance with the guide ofthe sliding bar 18 and on an upper side of the which the washing pole 14 is vertically mounted so that movement trace ofthe washing pole 14 can pass through a vertical upward side ofthe axis insertion hole 16.

In other words, as shown in Figs. 9 and 10, in the pulsator for the washing machine having the agitator according to another embodiment of the present invention, the axis insertion hole 16 through which the output axis 6 of the clutch section is passed at the center ofthe pulsator body. The supporting means 17 such as a ball bearing or a bushing is inserted between the output axis 6 and the axis insertion hole 16 so that the pulsator body 20b can move independently from the output axis 6 passed through the axis insertion hole 16, thus supporting the pulsator body 20b. The pinion gear 1 lb is mounted at the end of the output axis ofthe clutch section passed through the axis insertion hole 16. An upper pulsator 22 of a rectangular shape that is integrally mounted with the rack gear 12b and moves in a straight line same to the rack gear 12b is mounted on an upper side ofthe rack gear 12b mated with the pinion gear lib. Further, the washing pole 14 is vertically mounted at an upper central portion ofthe upper pulsator 22.

The upper pulsator 22 is maintained by the sliding bar 18 located below both sides of the axis insertion hole 16 at the center of the pulsator body 20b, and the slider 19 integrally installed in the upper pulsator. In other words, two slots 23 are formed in parallel in the pulsator body 20b. The stopper 15b for supporting the sliding bar 18 and for serving as the stopper to limit the straight-line movement of the upper pulsator 22, is installed at both ends of he slots 23. The sliding bar 18 is mounted to the pulsator body by means ofthe stopper 15b. The sliding bar 18 further includes a resilient member such as a spring for absorbing shock, vibration and noise occurring when the stopper 15b stops the movement of the upper pulsator 22. At this time, it should be noted that a magnet having the same polarity is mounted to one side ofthe slider 19 and one side ofthe stopper 15b contacting the slider, in addition to the resilient member such as the spring.

An operation ofthe pulsator for the washing machine having the agitator according to the present invention is described below.

As in the embodiment having two plain gears 1 la, 12a, when the pinion gear 1 lb is rotated in a counterclockwise direction, the rack gear 12b moves in a straight line with the pulsator body 20b stopped. The upper pulsator 22 and the washing pole 14 that are integrally coupled to the rack gear 12b also move in a straight-line movement along the sliding bar 18 along with the rack gear 12b. At this time, the rack gear 12b is moved by a given distance and the straight-line movement ofthe rack gear 12b is then stopped by the stopper 15b. If the rack gear 12b could not further perform the straight-line movement, the rack gear 12b, the upper pulsator 22 and the washing pole 14 are rotated to the counterclockwise direction same to the pinion gear lib along with the pulsator body 20b. If the motor 3 ofthe washing machine is rotated in a counterclockwise direction, the upper pulsator 22 and the washing pole 14 perform a straight-line movement and the pulsator body 20 is rotated in accordance with the same principle.

As such, the washing pole 14 on the upper pulsator 22 straightly moves along a given period before the rotation direction of the pulsator body 20b is changed. At this time, as in the embodiment using two plain gears 1 la,12a , the washing pole 14 loosens the laundry lumped at the center ofthe dehydration container and also directly applies a shock energy to the laundry, while passing through the center ofthe pulsator, thus increasing the laundry capability. In addition, the final stop location ofthe washing pole 14 is a location eccentric from the center of the pulsator by a given distance. The washing pole 14 is rotated along with the pulsator body 20b with such eccentric state. Therefore, as in a prior art, the rotating force ofthe pulsator is not transferred to the wash water and the laundry by the pulsator of a plain sthape. In the present invention, however, the laundry is directly rotated by a three-dimensionally protruded washing pole 14. Thus, even when excessive laundry is inserted into the dehydration container 2, the rotating force is folly transferred to the laundry, thus increasing the washing capability. In other words, the washing capability can be increased with a low speed rotation ofthe pulsator without a high-speed rotation. As a result, abrasion ofthe laundry can be significantly reduced.

The pulsator for the washing machine having the agitator according to another embodiment ofthe present invention is characterized in that it comprises a second rack gear that mates with the pinion gear 1 lb at an opposite of the rack gear 12b and moves symmetrically to the rack gear 12b, and a balancing body that is balanced with the upper pulsator 22 having the washing pole 14 and integrally moves with the second rack gear. In other words, in the embodiment using two plain gears, the balancing body 41 is inserted into the third plain gear 40 and the third plain gear 40 in order to make a balance. The second rack gear is symmetric to the rack gear 12b. The balancing body is inserted into the second rack gear, so that the second rack gear into which the balancing body is moved in an opposite direction to the rack gear 12b.

An operation ofthe pulsator washing machine will be below described. Only the wash water and the laundry within dehydration container 2 are rotated while the pulsator at its below side is rotated with the dehydration container 2 stopped. The dehydration operation dehydrates the wash water from the laundry due to the concentric force occurring when the dehydration container and the pulsator are integrally rotated at high speed. At this time, as the dehydration container is rotated at high speed, there may occur vibration and noise if the rotating dehydration container is not concentric to the washing pole within the dehydration container.

Another embodiment ofthe present invention provides a pulsator that can solve the above problem. In other words, a fixed hole 30 of a given depth that passes through the rotating arm 13 or the upper pulsator 22 is further formed at a lower side ofthe center of the washing pole. A fixing pin 31 that slides along a longitudinal direction of the output axis 5 and that can be inserted into the fixed hole 30 is formed within the output axis 6. A solenoid 33 that pushes upwardly the fixing pin 31 is mounted below the clutch section so that the fixing pin 31 can protrude outside the output axis 6 during the hydration operation. A return spring 32 for returning the fixing pin 31 into the output axis is mounted within the output axis during the washing operation.

Explaining in more detail, as shown in Figs. 8 and 11, a sliding hole along which the fixing pin 31 can slide within the output axis 6 of the clutch section. A fixing pin 31 in which the going and returning ofthe fixing pin 31 is made possible along the sliding hole is mounted. At this time, a packing 42 is inserted into a portion where the fixing pin 31 is protruded outwardly from the output axis 6 so that the wash water does not introduce into the sliding hole from the dehydration container or the washing container, as shown in Figs. 8 and 11. Further, the end ofthe fixing pin 31 is rounded so that the fixing pin 31 can be smoothly inserted into the fixing hole 30. In addition, a spring seat stage is installed at the center of the sliding hole. A return spring 32 is inserted so that the spring can be seated to the seat stage. At the same time, a spring latch is formed at the central portion ofthe fixing pin 31 so that the return spring 32 can be located between the seat stage and the latch. The length of the return spring 32 is deteπnined so that the fixing pin that is upwardly protruded from the output axis of the clutch section does not prohibit the going and returning movement of the rotating arm 13 or the upper pulsator 22 with the return spring 32 not affected by the compression or the extension pressure. Therefore, when the fixing pin 31 is upwardly protruded by an external force and is then inserted into the fixing hole 30, the return spring 32 that is mounted within the output axis 6 is affected by the compression pressure. If the external force is removed, the return spring is returned.

An end ofthe fixing pin 31 passed through the output axis at the bottom stage of the clutch section is connected to the solenoid 33 provided below the clutch section. When the solenoid 33 is driven, the fixing pin 31 is moved upwardly by means ofthe force of the solenoid 33, so that the end of the fixing pin 31 is protruded outwardly from the output axis 6 ofthe clutch section, as shown in Fig. 8. At this time, the return spring 32 that is mounted within the output axis is experienced by the compression pressure. When the solenoid 33 is not driven, the force applied by the solenoid is removed and the return spring 32 is simultaneously returned. Thus, as shown in Fig. 11, the fixing pin inserted into the fixed hole 30 is downwardly moved and is then inserted into the end ofthe output axis 6 of the clutch section. As such, the fixing pin 31 protruded outwardly from the output axis 6 is inserted into the fixed hole 30 formed at a lower side ofthe washing pole 14 shown in Fig. 8. Thus, when the dehydration container 2 and the pulsator are rotated at high speed for the purpose of the dehydration work, the washing pole 14 can be rotated at the center of the dehydration container 2. Therefore, during the high-speed rotation, vibration and noise due to eccentricity ofthe washing pole and mechanical malfunction due to eccentricity can be prevented.

As can be seen from Figs. 8 and 11, an electron coil 33a is wound around the bobbin within the solenoid housing and a plunger 33b that can move along an axial direction is formed within the solenoid 33. Thus, the plunger 33b is moved by a magnetic force between the plunger 33 that is magnetized by a magnetic field occurring when electricity flows into the electron coil 33a.and the magnetic core (not shown). As mentioned above, the pulsator for the washing machine having the agitator according to the present invention has outstanding advantages that it can not only prevent lump of the laundry at the center of the dehydration container due to fluctuation movement of the washing pole but also increase the washing efficiency. Further, the present invention can significantly prevent damage ofthe laundry due to abrasion since the washing capability can be increased with a low-speed rotation of a pulsator not a high-speed rotation.

Further, as the washing pole is eccentrically rotated within the dehydration container, the washing capability can be increased due to increased rotation force of the laundry. In addition, as the washing pole periodically applies strong shock energy to the laundry, the washing capability can be further increased.

The present invention has been described with reference to a particular embodiment in connection with a particular application. Those having ordinary skill in the art and access to the teachings ofthe present invention will recognize additional modifications and applications within the scope thereof

It is therefore intended by the appended claims to cover any and all such applications, modifications, and embodiments within the scope ofthe present invention.

Claims

WHAT IS CLAIMED IS:

1. A pulsator for a washing having an agitator in which the driving force of a motor is transferred to the pulsator via an output axis of a clutch section, comprising: a pulastor body formed at the center of an axis insertion hole through which the output axis of said clutch section passes; a first plain gear mounted at an end ofthe output axis ofthe clutch section passed through said axis insertion hole; a second plain gear to which dog is mounted, where a rotation axis is separated from the axis insertion hole, mounted to the pulsator body and mated with the first plain gear; a stopper mounted to the pulsator body, for limiting the rotation angle of the second plain gear along with the dog; a rotating arm to one end of which has a rotating axis integrally mounted to the center of the second plain gear and the other end of which has a washing pole the movement trace of which passes through a vertical upward ofthe axis insertion hole; and a pulsator cover the center of which has a hollow and having a through hole ofthe rotating axis ofthe rotating arm at a vertical upward direction ofthe center ofthe second plain gear to cover the pulsator body.

2. The pulsator for the washing machine having the agitator claimed in Claim 1, further including a rotating axis mounted to the pulsator body so that the rotating axis is symmetric to the rotating axis ofthe second plain gear against the axis insertion hole and then mated with the first plain gear, and a third plain gear into which a balancing body balancing with the washing pole at a location corresponding to the washing pole is inserted.

3. The pulsator for the washing machine having the agitator claimed in Claim 2, further including a second rotating arm at one end of which has a rotating axis integrally mounted at the center ofthe third plain gear and at the other end of which has a length in which the movement trace of the second washing pole does not pass through the vertical upward direction ofthe axis insertion hole, wherein a through hole of the rotating axis of the second rotating arm is further formed at a vertical upward direction ofthe center ofthe third plain gear in the pulsator cover.

4. A pulsator for a washing machine having an agitator in which the driving force of a motor is transferred to the pulsator via an output axis of a clutch section, comprising; a pulsator body at the center of which has an axis insertion hole through which an output axis ofthe clutch section passes, wherein slots are formed at both sides ofthe axis insertion hole; a sliding bar supported by a stopper for supporting a sliding bar formed below the slots;

a pinion gear mounted at an end of an output axis ofthe clutch section passed through the axis insertion hole; a rack gear mated with the pinion gear; and an upper pulsator on a lower side of which a slider straightly moving in accordance with the sliding bar and the rack gear are mounted and an upper side of which a washing pole the movement trace of which passes through a vertical upward direction ofthe axis insertion hole is mounted.

5. The pulsator for the washing machine having the agitator claimed in any of Claims

1 to 4, further including a fixed hole of a given depth that passes through the rotating arm or the upper pulsator at a lower side ofthe center ofthe washing pole; a fixing pin that slides in a longitudinal direction ofthe output axis and is inserted into the fixed hole, said fixing pin being formed within the output axis, a solenoid for upwardly pushing the fixing pin so that the fixing pin can protrude outside from the output axis during a hydration operation, said solenoid being formed at a lower side ofthe clutch section; and a return spring for returning the fixing pin internally into the output axis during a washing operation, said return spring being mounted within the output axis.