CN216338526U - Impeller type laundry equipment - Google Patents

Abstract

The utility model relates to the technical field of clothes washing, and particularly provides impeller type washing equipment, aiming at solving the problem that after the existing impeller type washing equipment is used for a long time, an ultrasonic transducer is separated from an impeller and enters a washing barrel, so that clothes can be damaged. The pulsator type washing machine of the present invention comprises: the box, the washtub, the impeller, ultrasonic transducer and anticreep component, the washtub sets up in the box, the impeller sets up the interior bottom at the washtub, the center department of impeller is provided with the holding tank structure that is used for holding ultrasonic transducer, the holding tank is structural to be formed with first joint portion, be formed with second joint portion on the anticreep component, under the condition that the equipment was accomplished, first joint portion and second joint portion block, and ultrasonic transducer's at least partly is located the downside of anticreep component, the anticreep component can prevent that ultrasonic transducer from deviating from holding the tank structure. The utility model can prevent the ultrasonic transducer from entering the washing barrel and avoid clothes damage.

Description

Impeller type laundry equipment

Technical Field

The utility model relates to the technical field of clothes washing, and particularly provides a pulsator washing device.

Background

The pulsator type washing machine is a common household appliance, and can wash clothes, so that people do not need to wash the clothes by hands, hands of people are liberated, and the pulsator type washing machine generally comprises a washing tub and a pulsator arranged at the bottom in the washing tub. Some prior pulsator type laundry devices are also provided with ultrasonic transducers, and in the process of washing, the ultrasonic transducers send ultrasonic waves to water in a washing barrel so as to wash clothes. The ultrasonic transducer improves the washing effect of clothes, can reduce the using amount of detergent, can reduce the washing cost of users, improve the satisfaction degree of the users, can reduce the pollution to the environment caused by using the detergent, is favorable for reducing the rinsing times, and realizes water and electricity saving. However, after the pulsator type washing machine has been used for a certain period of time, the connection between the ultrasonic transducer and the pulsator often becomes insecure, so that there is a risk that the ultrasonic transducer gets out of the pulsator and enters the washing tub, which may cause damage to the laundry, and may cause trouble to the user.

Therefore, there is a need in the art for a new pulsator type washing machine to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems that after the existing impeller type washing equipment is used for a long time, the connection between the ultrasonic transducer and the impeller usually becomes unstable, the risk that the ultrasonic transducer is separated from the impeller and enters the washing barrel exists, and the clothes can be damaged.

The present invention provides a pulsator type washing machine, which includes: box, washtub, impeller, ultrasonic transducer and anticreep component, the washtub sets up in the box, the impeller sets up the interior bottom of washtub, the center department of impeller is provided with and is used for holding ultrasonic transducer's holding tank structure, the holding tank is structural to be formed with first joint portion, be formed with second joint portion on the anticreep component, under the condition that the equipment was accomplished, first joint portion with second joint portion block, just ultrasonic transducer's at least some is located the downside of anticreep component, the anticreep component can prevent ultrasonic transducer follows deviate from in the holding tank structure.

In a preferred embodiment of the pulsator washing machine, the anti-falling member includes an anti-falling cover capable of blocking and preventing the ultrasonic transducer from falling off, and an extension portion formed by extending downward from a lower side of the anti-falling cover, the second engaging portion is formed on an outer side of the extension portion, and a recess is formed at a connection portion of the anti-falling cover and the extension portion so that the second engaging portion can be disengaged from the first engaging portion when an external force is applied to the extension portion.

In the above preferred technical scheme of the pulsator type washing machine, the first clamping portion is a protrusion, the second clamping portion is a groove, an inclined plane which gradually inclines inward from top to bottom is formed on the outer side of the lower end of the extension portion, and in the installation process of the anti-falling member, the inclined plane enables the lower end of the extension portion to easily pass through the protrusion.

In a preferred embodiment of the pulsator type washing machine, the anti-drop casing has a through hole formed therein.

In the preferred technical scheme of the pulsator washing device, the number of the extension parts, the first clamping parts and the second clamping parts is multiple, the extension parts are uniformly distributed along the periphery of the anti-falling housing, the extension parts correspond to the second clamping parts one to one, and the first clamping parts correspond to the second clamping parts one to one.

In a preferred embodiment of the above pulsator washing machine, the first engaging portion is a groove, the anti-falling member includes a top plate and an extending portion, the top plate extends in a horizontal direction, the extending portion extends downward from a middle portion of a lower side of the top plate, and the second engaging portion is a protrusion extending outward in the horizontal direction from a side surface of the extending portion.

In a preferred embodiment of the pulsator type washing machine, at least the top of the accommodating groove structure is a cylindrical accommodating structure with a vertical axis, the groove is formed in the cylindrical accommodating structure, the cross section of the protrusion along the horizontal direction has four edges, one pair of the edges is straight, the other pair of the edges is arc-shaped, and the protrusion is engaged with the groove through the arc-shaped edges.

In a preferred embodiment of the above-mentioned pulsator type washing machine, at least a part of each of the two edges having a straight line shape is located inside an edge of a cross section of the top plate in a horizontal direction.

In the above preferred embodiment of the pulsator type washing machine, the top plate is located above the top side of the receiving groove structure in a state that the assembly is completed.

In the preferred technical scheme of the wave wheel type laundry equipment, the washing barrel adopts a single-barrel structure; or the washing barrel comprises an outer barrel and an inner barrel rotatably arranged in the outer barrel, and the impeller is arranged at the inner bottom of the inner barrel.

As can be understood by those skilled in the art, in a preferred embodiment of the present invention, the holding tank structure for holding the ultrasonic transducer is formed with a first clamping portion, the pulsator type washing machine further includes an anti-drop member, the anti-drop member is formed with a second clamping portion, when the assembly is completed, the first clamping portion is clamped with the second clamping portion, and at least a portion of the ultrasonic transducer is located at a lower side of the anti-drop member, the anti-drop member can prevent the ultrasonic transducer from dropping out of the holding tank structure, that is, the anti-drop member can block the ultrasonic transducer, even if the connection between the ultrasonic transducer and the pulsator fails, the ultrasonic transducer cannot enter the washing tub due to the blocking effect of the anti-drop member, and the ultrasonic transducer is prevented from being mixed into the clothes to damage the clothes; in addition, through setting up the first joint portion that is formed on the holding tank structure and the second joint portion that is formed on the anticreep component to make first joint portion and second joint portion block each other, such setting makes the anticreep component can detachably set up structurally at the holding tank of impeller, is convenient for maintain it, change when ultrasonic transducer breaks down.

Further, the anticreep component includes anticreep housing and extension, the anticreep housing can block and prevent that ultrasonic transducer from deviating from, the extension is followed anticreep housing downside downwardly extending and is formed, second joint portion is formed in the outside of extension, the junction of anticreep housing and extension is formed with sunken so that can make second joint portion and first joint portion remove the block under the condition that external force was exerted to the extension, such setting, can be convenient for dismantle the anticreep component, so that change the anticreep component or maintain ultrasonic transducer behind the anticreep component of pulling down.

Further, first joint portion is the arch, and second joint portion is the recess, and the lower extreme outside of extension is formed with from last inclined plane to the leanin gradually down, and in the installation of anticreep component, the inclined plane makes the lower extreme of extension easily follow the arch and passes through, such setting for at the in-process of installation anticreep component, the extension lower extreme of anticreep component easily follows the arch and passes through, the installation of the anticreep component of being convenient for.

Furthermore, a through hole is formed in the anti-falling cover, and the arrangement is convenient for the ultrasonic wave emitted by the ultrasonic transducer to be transmitted out through the through hole.

Further, the quantity of extension, first joint portion and second joint portion is a plurality ofly, and anticreep housing a week equipartition setting is followed to a plurality of extensions, extension and second joint portion one-to-one, first joint portion and second joint portion one-to-one, such setting for the power that comes from second joint portion that the anticreep component received disperses to a plurality of extensions uniformly on, avoids the extension atress too big.

Further, first joint portion is the recess, the anticreep component includes roof and extension, the roof extends along the horizontal direction and forms, the extension forms from roof downside middle part downwardly extending, second joint portion is for following the outside arch that extends of horizontal direction along the extension side, such setting, a concrete implementation of anticreep component is provided, make the anticreep component can block ultrasonic transducer, even the connection between ultrasonic transducer and the impeller is inefficacy, because the effect of blockking of anticreep component, ultrasonic transducer also can not get into in the washing bucket, prevent that ultrasonic transducer from sneaking into in the clothing and causing the clothing impaired.

Further, the at least top of holding tank structure is the cylindric holding structure that the axis is vertical, and the recess is formed on cylindric holding structure, and protruding cross-section along the horizontal direction has four edges, and wherein a pair of relative marginal shape is the straight line, and a pair of relative outer fringe shape is the arc in addition, and protruding edge and the recess block that is the arc through the shape, such setting for only bellied partial edge and recess block, the user's of being convenient for dismouting anticreep component.

Further, at least one part of each of two edges in the shape of a straight line is positioned in the inner side of the edge of the section of the top plate along the horizontal direction, so that the bulge can avoid more space for a user to hold the top plate, and the user can hold the top plate conveniently to disassemble and assemble the anti-dropping member.

Further, the top plate is located above the top side of the receiving groove structure in a state where the assembly is completed, and this arrangement facilitates a user to hold the top plate for the purpose of disassembling the detachment prevention member.

Further, in a possible situation, the washing barrel adopts a single-barrel type structure, and the arrangement ensures that the structure of the washing barrel is simpler and is convenient to maintain; in still another possible case, the washing tub includes an outer tub and an inner tub rotatably disposed within the outer tub, and the pulsator is disposed at an inner bottom of the inner tub, such an arrangement that the washing tub can not only wash the laundry but also dehydrate the laundry by rotation of the inner tub, such that the washing tub is functionally diversified.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of a first embodiment of a pulsator type washing machine according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic structural diagram of a third embodiment of the pulsator washing machine according to the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is a first schematic structural view of an anti-slip member in a first embodiment of the pulsator washing machine of the present invention;

FIG. 6 is a second schematic structural view of the anti-separation member in the first embodiment of the pulsator washing machine of the present invention;

FIG. 7 is a third schematic structural view of an anti-separation member in the first embodiment of the pulsator washing machine of the present invention;

FIG. 8 is a schematic structural view of an anti-slip member in a second embodiment of the pulsator washing machine according to the present invention;

FIG. 9 is a first schematic structural view of an anti-separation member in a third embodiment of the pulsator washing machine of the present invention;

fig. 10 is a second schematic structural view of the anti-falling member in the third embodiment of the pulsator washing machine of the present invention.

Reference numerals:

1. a box body; 2. a washing tub; 21. an inner barrel; 22. an outer tub;

3. an impeller; 31. an accommodating groove structure; 311. a first clamping part;

4. an ultrasonic transducer; 41. an ultrasonic emission probe; 42. a power supply lead;

5. an anti-drop member;

51. an anti-drop housing; 511. recessing; 512. a through opening; 52. an extension portion; 521. a second clamping part; 522. an inclined surface;

51', a top plate; 52', an extension; 53' and a second clamping part.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Based on the prior art that the connection between the ultrasonic transducer and the impeller is not firm after the existing impeller type washing equipment is used for a long time, and the risk that the ultrasonic transducer is separated from the impeller and enters the washing barrel exists, and the clothes can be damaged.

Specifically, as shown in fig. 1 to 4, the pulsator type washing machine of the present invention includes: the ultrasonic cleaning machine comprises a box body 1, a washing barrel 2, a wave wheel 3, an ultrasonic transducer 4 and an anti-falling component 5, wherein the washing barrel 2 is arranged in the box body 1, the wave wheel 3 is arranged at the inner bottom of the washing barrel 2, a containing groove structure 31 for containing the ultrasonic transducer 4 is arranged at the center of the wave wheel 3, a first clamping part 311 is formed on the containing groove structure 31, a second clamping part 521 (53') is formed on the anti-falling component 5, when the assembly is completed, the first engaging portion 311 engages with the second engaging portion 521 (53'), and at least a part of the ultrasonic transducer 4 is positioned at the lower side of the anti-drop component 5, the anti-drop component 5 can block the ultrasonic transducer 4 to prevent the ultrasonic transducer 4 from dropping out from the containing groove structure 31, thereby preventing the ultrasonic transducer 4 from entering the washing tub 2, and further preventing the ultrasonic transducer 4 from being mixed into the clothes to damage the clothes.

Wherein, the washing tub may adopt a single tub type structure, and may adopt a sleeve tub type structure, i.e., the washing tub 2 includes an outer tub 22 and an inner tub 21 rotatably disposed in the outer tub 22, and the pulsator 3 is disposed at an inner bottom of the inner tub 21 (formal case shown in fig. 1 and 3). Further, although fig. 1 and 3 each show a certain gap between the ultrasonic transducer 4 and the retaining member 5, the ultrasonic transducer 4 may be provided in contact with the retaining member 5. In addition, as shown in fig. 2 and 4, the ultrasonic transducer 4 is inserted into the receiving groove structure 31, and the mounting of the ultrasonic transducer 4 is achieved by a frictional force between the ultrasonic transducer 4 and the receiving groove structure 31. Of course, the ultrasonic transducer 4 may be mounted in the receiving groove structure 31 by means of screws or clamping.

In the above, the ultrasonic transmission probe 41 of the ultrasonic transducer 4 may have a plate structure (as shown in fig. 2 and 4), or may have a cylindrical structure. The ultrasonic transducer 4 may emit ultrasonic waves to the water in the washing tub 2 during a conventional washing process (i.e., a process in which the pulsator 3 rotates to agitate the water in the washing tub 2 to perform washing), and the ultrasonic waves cause the water in the washing tub 2 to flow during propagation to generate a large number of fine bubbles, which generate air pressure shock waves when broken, to rapidly peel off dirt on the surface of the laundry and in the seams of the knitting lines, thereby performing washing of the laundry, in which case the combined action of the ultrasonic waves and the flow of the water performs washing of the laundry. Of course, the pulsator 3 and the inner tub 21 may not rotate, and the ultrasonic transducer 4 may emit ultrasonic waves to the water in the washing tub 2 to wash the laundry by the ultrasonic waves alone.

In a possible case, the holding groove structure 31 is a through groove which is disposed through the pulsator 3, and through holes are formed on the washing tub 2 (when the washing tub 2 is a sleeve type structure, through holes are formed on both the inner tub 21 and the outer tub 22), and the power supply wires 42 (as shown in fig. 2 and 4) of the ultrasonic transducer 4 sequentially pass through the holding groove structure 31 and the through holes on the washing tub 2 so as to be connected to the circuit of the pulsator type washing machine to obtain electric power. In the case where the receiving groove structure 31 is a through groove and a through hole is formed in the washing tub 2, a first gasket receiving groove (not shown) may be formed in an inner sidewall of the receiving groove structure 31, and a sealing ring (not shown in the figure) is arranged in the first sealing ring accommodating groove, one part of the ultrasonic transducer 4 is tightly attached to the sealing ring, to prevent the water in the washing tub 2 from flowing out from the holding groove structure 31 provided on the pulsator 3, a second packing ring holding groove (not shown) may be formed on the inner sidewall of the through hole of the washing tub 2, and a sealing ring (not shown) is arranged in the second sealing ring accommodating groove, the power supply lead 42 passing through the through hole is tightly attached to the sealing ring to prevent the water in the washing tub 2 from flowing out from the through hole, thereby avoiding water from entering the box body 1, avoiding the short circuit of the electric elements in the box body 1 when meeting water and improving the safety of the impeller type washing equipment. Of course, in the case where the accommodation groove structure 31 is a non-through groove, the ultrasonic transducer 4 may include a power supply battery through which power is supplied. When the electric energy stored in the power supply battery of the ultrasonic transducer 4 is exhausted, the user can take down the anti-drop member 5, detach the ultrasonic transducer 4 again, and replace the power supply battery. Set up holding tank structure 31 to the form of non-through groove, can avoid when washtub 2 adopts single-tub formula structure, water in washtub 2 flows into in box 1 through holding tank structure 31 to avoid the electrical element in box 1 to meet water and short circuit, improved impeller formula laundry equipment's security.

The technical solution of the present invention is illustrated below with reference to three specific embodiments.

Example one

As shown in fig. 5 to 7, the retaining member 5 includes a retaining cover 51 and an extending portion 52, the retaining cover 51 can block and prevent the ultrasonic transducer 4 from being removed, the extending portion 52 is formed by extending downward from the lower side of the retaining cover 51, a second clamping portion 521 is formed at the outer side of the extending portion 52, and a recess 511 is formed at the connection between the retaining cover 51 and the extending portion 52. Through setting up sunken 511, can be convenient for the user to exert external force to extension 52, after the power reaches certain size, second joint portion 521 can remove the block with first joint portion 311.

As shown in fig. 6 and 7, the number of the extension portions 52, the first clamping portions 311 and the second clamping portions 521 is multiple, the extension portions 52 are uniformly distributed along a circumference of the anti-falling housing 51, the extension portions 52 are in one-to-one correspondence with the second clamping portions 521, and the first clamping portions 311 are in one-to-one correspondence with the second clamping portions 521. With such an arrangement, the force applied by the retaining member 5 from the second clamping portion 521 is uniformly distributed to the plurality of extending portions 52, and the extending portions 52 are prevented from being excessively stressed.

As shown in fig. 2 and 6, the first catching portion 311 is a protrusion, the second catching portion 521 is a groove, and an inclined surface 522 which is inclined inward gradually from top to bottom is formed on the outer side of the lower end of each extending portion 52, and in the installation process of the retaining member 5, the retaining member 5 is pressed downward, and in the process, a lower portion of the inclined surface 522 contacts with the protrusion first, and the inclined surface 522 enables the lower end of the extending portion 52 to pass through the protrusion smoothly and finally move to the lower portion of the protrusion.

It should be noted that the above preferred embodiments are only used for illustrating the principle of the present invention, and are not intended to limit the protection scope of the present invention. Without departing from the principles of the present invention, those skilled in the art can adjust the setting manner described above, so that the present invention can be applied to more specific application scenarios.

For example, although the first embodiment describes the first clamping portion 311 as a protrusion and the second clamping portion 521 as a groove, in some alternative embodiments, the first clamping portion 311 may be a hook and the second clamping portion 521 may be a bayonet, or the first clamping portion 311 may be a groove and the second clamping portion 521 may be a protrusion, etc.

Example two

As shown in fig. 8, in the structure described in the first embodiment, a through hole 512 is formed in the middle of the anti-drop cover 51, and the shape of the through hole 512 is circular. The ultrasonic transmission probe 41 may have at least a portion thereof facing the through-hole 512 and located below the through-hole 512, or the top of the ultrasonic transmission probe 41 may extend into the through-hole 512, or the ultrasonic transmission probe 41 may extend upward from the through-hole 512. With such an arrangement, the ultrasonic waves emitted by the ultrasonic transducer 4 can be conveniently transmitted out through the through hole 512, the peripheral width of the anti-falling cover 51 is uniform, and the anti-falling cover 51 is prevented from being damaged due to the existence of the extremely narrow width part on the periphery of the anti-falling cover 51.

It should be noted that the above preferred embodiments are only used for illustrating the principle of the present invention, and are not intended to limit the protection scope of the present invention. Without departing from the principles of the present invention, those skilled in the art can adjust the setting manner described above, so that the present invention can be applied to more specific application scenarios.

For example, although the second embodiment has been described by taking an example in which the through-hole 512 is formed in the middle of the retaining cover 51 and the shape of the through-hole 512 is circular, the through-hole 512 is not necessarily formed in the middle of the retaining cover 51 and may be slightly offset; the shape of the through hole 512 is not limited to a circle, and may be an ellipse, a rectangle, or the like; in addition, the anti-drop cover 51 may not be provided with the through opening 512, and in this case, the anti-drop cover 51 may be made of a solid metal material to further facilitate the propagation of the ultrasonic wave.

EXAMPLE III

As shown in fig. 4, 9 and 10, the first catching portion 311 is a groove, the retaining member 5 includes a top plate 51 ' and an extending portion 52 ', the top plate 51 ' is formed to extend in the horizontal direction, the extending portion 52 ' is formed to extend downward from the lower middle portion of the top plate 51 ', and the second catching portion 53 ' is a protrusion extending outward in the horizontal direction from the side surface of the extending portion 52 '.

As shown in fig. 4 and 9, at least the top of the receiving groove structure 31 is a cylindrical receiving structure with a vertical axis, the groove is formed on the cylindrical receiving structure, the cross section of the protrusion along the horizontal direction has four edges, one pair of the opposite edges is linear, the other pair of the opposite edges is arc-shaped, and the protrusion is engaged with the groove through the edge with the arc-shaped shape. With such an arrangement, only the edge of the protruding portion is engaged with the groove, so that the user can easily mount and dismount the anti-slip member 5.

With continued reference to fig. 4 and 9, both edges, which are rectilinear in shape, are at least partially located inwardly of the edges of the top panel 51' in horizontal cross-section. With the assembly completed, the top plate 51' is located above the top side of the receiving groove structure 31. Such an arrangement, on the one hand, allows the protrusion to provide more space for the user to hold the top plate 51 ', and on the other hand, the top plate 51' is located above the top side of the receiving groove structure 31, so that the user can hold the top plate 51 ', and the combined effect of the two aspects can be more convenient for the user to hold the top plate 51' to detach the anti-dropping member 5.

It should be noted that the above preferred embodiments are only used for illustrating the principle of the present invention, and are not intended to limit the protection scope of the present invention. Without departing from the principles of the present invention, those skilled in the art can adjust the setting manner described above, so that the present invention can be applied to more specific application scenarios.

For example, the protrusion formed by extending from the extension portion 52' may have a circular edge along the cross section of the protrusion in the horizontal direction, and the entire edge may extend into the groove to achieve the engagement when the assembly is completed.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the utility model, and the technical scheme after the changes or substitutions can fall into the protection scope of the utility model.

Claims (10)

1. A pulsator type washing machine, comprising: the washing machine comprises a box body, a washing barrel, a wave wheel, an ultrasonic transducer and an anti-falling component, wherein the washing barrel is arranged in the box body, the wave wheel is arranged at the inner bottom of the washing barrel, a holding tank structure for holding the ultrasonic transducer is arranged at the center of the wave wheel, a first clamping part is formed on the holding tank structure, a second clamping part is formed on the anti-falling component,

under the condition that the assembly is completed, the first clamping portion is clamped with the second clamping portion, at least one part of the ultrasonic transducer is located on the lower side of the anti-falling component, and the anti-falling component can prevent the ultrasonic transducer from falling out of the accommodating groove structure.

2. The pulsator washing machine as claimed in claim 1, wherein the coming-off preventing member includes a coming-off preventing cover capable of blocking and preventing the ultrasonic transducer from coming off, and an extending portion formed to extend downward from a lower side of the coming-off preventing cover, the second catching portion is formed at an outer side of the extending portion, and a recess is formed at a junction of the coming-off preventing cover and the extending portion so as to enable the second catching portion to be disengaged from the first catching portion when an external force is applied to the extending portion.

3. The pulsator washing machine as claimed in claim 2, wherein the first catching portion is a protrusion, the second catching portion is a groove, and an inclined surface is formed at an outer side of a lower end of the extension portion to be gradually inclined inward from top to bottom, the inclined surface allowing the lower end of the extension portion to easily pass through the protrusion during the installation of the escape prevention member.

4. The pulsator washing machine as claimed in claim 2, wherein the drop-off preventing casing is formed with a through hole.

5. The pulsator washing machine as claimed in claim 2, wherein the number of the extension portions, the first engaging portions and the second engaging portions is plural, the plural extension portions are uniformly distributed along a circumference of the anti-falling casing, the extension portions correspond to the second engaging portions one to one, and the first engaging portions correspond to the second engaging portions one to one.

6. The pulsator washing machine as claimed in claim 1, wherein the first catching portion is a groove, the run-off preventing member includes a top plate formed to extend in a horizontal direction and an extension portion formed to extend downward from a lower middle portion of the top plate, and the second catching portion is a protrusion extending outward in the horizontal direction from a side surface of the extension portion.

7. The pulsator washing machine as claimed in claim 6, wherein the receiving groove structure is formed on the cylindrical receiving structure at least at the top thereof with a cylindrical receiving structure having a vertical axis, the protrusion has four edges in a horizontal cross section, one pair of the opposite edges is linear in shape, the other pair of the opposite edges is arc-shaped, and the protrusion is engaged with the groove through the arc-shaped edges.

8. A pulsator washing machine as claimed in claim 7, wherein both of the edges having a straight line shape are at least partially located inside the edge of the top plate in a horizontal cross section.

9. The pulsator washing machine as claimed in claim 8, wherein the top plate is located above the top side of the receiving groove structure in a state of being assembled.

10. A pulsator washing machine as claimed in any one of claims 1 to 9, wherein the washing tub adopts a single tub type structure; or,

the washing barrel comprises an outer barrel and an inner barrel rotatably arranged in the outer barrel, and the impeller is arranged at the inner bottom of the inner barrel.

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