JP4038227B2 - Drum washing machine - Google Patents

Description

  The present invention provides a water tank elastically supported in an outer box, a laundry drum rotating around a substantially horizontal axis provided in the water tank, and a clothes insertion port provided in the outer box and the water tank. The present invention relates to a drum-type washing machine provided with a door packing to be connected to the machine.

  A drum type washing machine having a horizontal rotating drum that rotates about a substantially horizontal axis is widely used particularly in Europe. In general, a drum-type washing machine has been commercialized in which a washing operation including a washing process, a rinsing process, and a dehydrating process, in which a drum is rotated at a low speed, and a drying process are performed.

  11 and 12 are a side view and a front view showing the inside of a conventional drum-type washing machine. FIG. 13 is an enlarged side view showing the periphery of a door packing of a conventional drum type washing machine. As shown in these drawings, the outer box 1 is provided with a laundry input port 1a opened and closed by a door 3 on the front surface. In the outer box, a bottomed cylindrical water tank 4 having an opening 4a on the front surface is provided horizontally. The water tank 4 has a double structure in which a cylindrical drum 5 with a bottom is supported rotatably around a shaft portion 5e. Further, behind the water tank 4, a drive mechanism 9 for rotating the shaft portion 5e is disposed.

  The water tub 4 is arranged so as to be inclined so that the back side is downward by a predetermined angle θ in order to improve the visibility when the laundry is taken in and out. The front and back surfaces of the water tank 4 are suspended from the front and back by two suspension devices 6 respectively in the front and back, and the lower portion of the water tank 4 is supported by two right and left damping devices 8 from below. Thus, the water tank 4 is elastically supported in the outer box 1.

  The periphery of the laundry input port 1a provided in the outer box 1 and the periphery of the opening 4a of the water tank 4 are connected by a door packing 10 made of rubber or the like to prevent water leakage between the outer box 1 and the water tank 4. It is like that. Further, an annular groove 10 a is formed to suppress the vibration of the water tank 4 from being transmitted to the outer box 1.

  The steps of washing, rinsing, dewatering and drying are executed by rotating the rotary drum 5 with the drive mechanism 9. At this time, the suspension device 6 and the door packing 10 are expanded and contracted by the rotation of the rotating drum 5 and vibration of the water tank 4 is generated. The suspension device 6 and the door packing 10 function to return the deviated water tank 4 to a predetermined position to vibrate the water tank 4. As described above, the water tank 4, the rotating drum 5, the drive device 9, and the like constitute a vibrating body 40 that vibrates integrally. The attenuating device 8 functions to attenuate the vibration of the water tank 4.

Japanese Patent Application Laid-Open No. 11-128586 discloses a door packing that prevents wear due to friction with clothing. As shown in FIG. 14, the door packing 10 is provided with a coating 29 for improving smoothness and wear resistance on the inner surface.
JP-A-11-128586

  However, in such a conventional drum-type washing machine, the clothing that protrudes from the opening of the rotating drum rubs the inner peripheral surface of the vibration absorbing annular groove of the door packing during dehydration rotation, and the door packing is caused by friction with the clothing. There was a problem that it was worn, and further, it was torn and led to water leakage.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a drum-type washing machine that is less likely to damage the door packing without impairing user usability.

In order to solve the above-described problems, the present invention provides a rotating drum having a rotating shaft in a direction inclined with respect to a horizontal direction, and an opening formed in the rotating shaft direction so that a diameter of a peripheral edge of the opening is reduced. A water tank having a first opening that accommodates the rotating drum and faces the opening of the rotating drum, and an outer box having a second opening that accommodates the water tank and faces the first opening of the water tank. A door for closing the second opening of the outer box, and one end connected to the water tank so as to surround the first opening, and the other end to the outer box so as to surround the second opening of the outer box. A drum-type washing machine having a door packing formed with an annular groove for vibration absorption between the one end and the other end, wherein the first opening of the water tank is the opening of the rotating drum Smaller than the circumference of the first opening of the aquarium With section a portion forming a stepped shape so as to be positioned inside of the rotary drum from the opening of the rotary drum is formed, the portion constituting the stepped shape formed to have a surface facing the bottom surface of the rotating drum A drum-type washing machine characterized by the above (claim 1) .

  According to the drum type washing machine of the present invention, since the first opening of the water tub is formed smaller than the opening of the rotating drum, if the clothes try to protrude from the rotating drum while the rotating drum is rotating, Therefore, the clothes can be prevented from protruding from the water tank and getting stuck in the vibration-absorbing annular groove of the door packing. As a result, wear due to friction between the door packing and the clothing during the dehydration process can be suppressed and the life can be extended.

According to the drum type washing machine of the present invention, it is possible to prevent the laundry that is about to protrude from the rotating drum from protruding outside the aquarium, and the laundry enters the vibration absorbing annular groove of the door packing outside the aquarium. Can be prevented. Accordingly, it is possible to prevent the clothing from being damaged by rubbing the inner peripheral surface of the door packing, and the door packing from being worn and torn to cause water leakage.

  An embodiment of the present invention will be described with reference to FIGS. For convenience of explanation, the same reference numerals are given to the same parts as those in FIGS. 11 and 12 of the conventional example. FIG. 1 is a perspective view illustrating an appearance of a drum type washing machine according to an embodiment of the present invention. FIG. 2 is a cross-sectional view including a partial cross section of the drum type washing machine as viewed from the side. The outer box 1 forming the outer wall of the drum-type washing machine can be opened and closed with a door 3 at the front. An operation panel 11 having operation keys and a display unit is provided on the front upper portion of the outer box 1.

  Further, the outer box 1 is formed with an opening (second opening) 1a for taking in and out the laundry, that is, a laundry input port 1a. This opening 1 a can be opened and closed by a door 3. Inside the outer box 1, a bottomed cylindrical water tank 4 having an opening (first opening) 4a on the front surface is provided horizontally. FIG. 5 is a front view of the drum type washing machine. The water tank 4 is suspended in the outer box 1 so as to be vibrated by a suspension device 6.

  A bottomed cylindrical rotating drum 5 is disposed in the water tank 4. A bearing 60 is integrated into the water tank 4 via a motor case 9a. A shaft portion 5e fixed to the rotating drum 5 is supported by a bearing 60, so that the rotating drum 5 is rotatable. A rotor 9b is fixed to the shaft portion 5e, and a stator 9c is fixed in the motor case 9a. Thereby, the drive mechanism 9 which rotationally drives the rotary drum 5 is comprised.

  A small hole 5 a is provided in the entire peripheral wall of the rotary drum 5. The small holes 5a allow washing water to flow between the water tank 4 and the rotating drum 5 during washing. A baffle 5b protrudes from the inner wall surface of the rotating drum 5, and the laundry is hooked and lifted by the rotation of the rotating drum 5, and is washed by dropping it into the washing liquid.

  A fluid balancer 5d is provided on the outer peripheral edge of the opening 5c on the front surface of the rotating drum 5. A fluid such as salt water is sealed in the fluid balancer 5d, and the fluid moves when the rotating drum 5 rotates, so that the center of gravity movement due to the deviation of the laundry and the washing liquid is canceled. The fluid balancer 5 d may be provided on the inner peripheral edge of the rotating drum 5. The rotation axis yy of the rotary drum 5 is inclined so that the depth of the rotary drum 5 is lowered by an angle θ with respect to the horizontal direction. Thereby, when the user stands and operates on the front side of the drum type washing machine, the line of sight is improved to the back of the rotating drum 5.

  In addition, the rotating drum 5 may not be inclined with respect to the horizontal direction as shown in the figure, but may be arranged so as to coincide with the horizontal direction so that the rotation axis yy coincides with the horizontal direction. it can. A door packing 10 made of an elastic material such as rubber or soft resin is attached to the periphery of the laundry input port 1a and the opening 4a of the water tub 4 so as to form a passage for taking in and out the laundry. That is, the door packing 10 is attached to the outside of the side wall of the water tank 4 so that one end surrounds the opening 4a of the water tank 4, and the other end is inside the side wall of the outer box 1 so as to surround the opening 1a of the outer box 1. It is attached.

  The door packing 10 has a structure in which when the door 3 is closed, the inner peripheral edge 10d is in close contact with the peripheral edge of the door 3 to close the passage. As a result, waterproofing during the washing operation is performed. In addition, the door packing 10 is provided with a bellows or the like, and is provided with a vibration absorbing annular groove 10a that is bent in accordance with the vibration of the water tank 4 to follow. A water supply pipe 12 connected to a water pipe is disposed in the upper part of the outer box 1. When the water supply valve 13 provided in the middle of the water supply pipe 12 is opened, water is supplied into the water tank 4 from the water supply nozzle 15 attached to the door packing 10 via the detergent case 14.

  The drainage duct 16 led out from the bottom surface of the water tank 4 is provided with a connection case 17 and a drainage pump 18 provided with a lint filter 17a in the middle of the path, and drains the washing liquid from the water tank 4 to the outside of the outer box 1. It has a configuration. The lint filter 17a is detachably mounted in the connection case 17 and can be removed from the lower front portion of the outer box 1.

  A water level sensor 23 is provided on the upper part of the connection case 17 from the air trap 22 through the pressure guide pipe 21. The water level sensor 23 moves the magnetic body in the coil in accordance with the pressure change in the air trap 22. The resulting change in coil inductance is detected as a change in oscillation frequency, and the water level in the water tank 4 is detected.

  FIG. 3 is a cross-sectional view including a partial cross section of the drum type washing machine as viewed from the side, and represents a portion having a different cross section from the portion shown in FIG. 2. As shown in FIG. 3, a circulation duct 19 branched from the drainage duct 16 b is provided on the outlet side of the connection case 17. The circulation duct 19 is connected to the door packing 10 so as to face the opening 4 a of the water tank 4, and includes a circulation pump 20 in the middle of the path.

  Then, when the drain pump 18 is stopped and the circulation pump 20 is driven, a circulation path that reaches the water tank 4 through the water tank 4, the drain duct 16b, the circulation pump 20, and the circulation duct 19 is formed. As a result, the washing liquid in the water tub 4 is circulated through the circulation path, and the detergent in the washing liquid is sufficiently dissolved while passing through the circulation path, and the lint and the like are removed by the lint filter 17a. Therefore, it is possible to prevent the lint from reattaching to the laundry.

  FIG. 4 is a cross-sectional view including a partial cross section of the drum-type washing machine as viewed from the side, and represents a portion having a different cross section from the portion illustrated in FIGS. 2 and 3. As shown in FIG. 4, a drying unit 24 for drying the laundry composed of the blower fan 25 and the heater 26 is provided above the water tank 4.

  The drying unit 24 is arranged in the middle of the path of the cooling duct 27 that connects the outlet 4b facing the opening 4a of the water tank 4 and the circulation port 4c provided in the lower part. A cooler 51 is arranged in the cooling duct 27.

  In the configuration as described above, the control device 2 for controlling the operation of the drum type washing machine is arranged on the back surface of the operation panel 11 and executes the operation chart shown in FIG. The washing operation will be described below with reference to FIG. When the laundry is loaded from the laundry loading port 1 a and the door 3 is closed, the inner peripheral edge 10 d of the door packing 10 is brought into close contact with the peripheral edge of the door 3 to seal the water tank 4. Then, when a detergent is put into the detergent case 14 and the operation panel 11 is operated, a washing operation is started by a command from the control device 2.

  First, in the water supply operation of the “washing process”, the door 3 is locked and the water supply valve 13 is opened. Based on the opening of the water supply valve 13, the tap water flows into the water tank 4 and the rotating drum 5 together with the detergent from the water supply nozzle 15 via the detergent case 14. Then, when the water level in the water tank 4 reaches a predetermined water level, the water level sensor 23 detects it, the water supply valve 13 is closed, the drive mechanism 9 is driven, the rotary drum 5 is rotationally controlled by the washing chart, and is washed for a predetermined time. Operation is performed.

  The rotation of the rotating drum 5 is set by a rotation chart in which the rotation speed according to the washing, rinsing, dehydrating and drying processes, or the type of laundry, and also the reversing time and reversing cycle are changed. Alternatively, it is programmed to be selected automatically.

  When the “washing process” is completed, the process proceeds to a “rinsing process” in which the rinse dehydrating operation and the stirring rinse operation are alternately repeated a plurality of times. In the “rinsing step”, first, the drain pump 18 is operated to perform a drain operation for draining the washing liquid to the outside of the outer box 1 through the drain duct 16 and the connection case 17.

  When the draining operation is completed, the rotary drum 5 rotates on the first dehydration chart (dehydration chart 1), and the rinsing dehydration operation is performed. The washing liquid of the laundry is discharged to the inner wall of the water tank 4 through the small holes 5a provided in the entire peripheral wall of the rotating drum 5 by centrifugal force due to dehydration rotation. The washing liquid flowing down to the lower part of the water tank 4 through the inner wall is drained to the outside through the drainage duct 16.

  During the rinsing and dehydrating operation, the water supply valve 13 may be opened to inject tap water into the water tank 4 from the water supply nozzle 15. If it does in this way, tap water can permeate | transmit a laundry with a centrifugal force and can remove the detergent remaining in the laundry efficiently. The first dehydration chart is a chart suitable for dehydrating a washing liquid containing a lot of detergent by stopping the drum rotation in the middle or changing the rotation speed.

  When the rinsing dehydration operation is completed, a water supply operation is performed, the drain pump 18 is stopped, and the water supply valve 13 is opened again. When the water level in the water tank 4 reaches a predetermined water level with the opening of the water supply valve 13, the water supply valve 13 is closed, and the drive mechanism 9 is driven to rotate the rotating drum 5 in accordance with the rinsing chart, thereby executing the stirring and rinsing operation.

  During this stirring and rinsing operation, a soft finish agent storage box (not shown) and a rinse water supply path communicating therewith may be separately provided, and water may be supplied together with the soft finish agent from this rinse water supply path. Further, the washing liquid in the water tank 4 may be circulated by driving the circulation pump 20 during the washing operation or the stirring / rinsing operation.

  When the above “rinse dehydrating operation” and “stirring rinsing operation” are repeated several times to complete the “rinsing step”, the program is switched to the “dehydrating step”. In the “dehydration step”, first, the water supply valve 13 is closed and the drainage pump 18 is operated to drain the washing liquid to the outside.

  Then, the rotary drum 5 is rotated by the second dehydration chart (dehydration chart 2), and the final dehydration operation is performed. In the final dehydrating operation, the washing liquid is discharged to the inner wall of the water tank 4 through the small holes 5a provided in the entire peripheral wall of the rotating drum 5 by centrifugal force due to the dehydrating rotation. Thereafter, the washing liquid flows down the inner wall of the water tank 4 and drains to the outside through the drainage duct 16.

  When the “dehydration step” is completed, the rotary drum 5 is rotated according to the drying chart and the blower fan 25 and the heater 26 are driven to execute the “drying step”. The air in the rotary drum 5 passes through the small holes 5a of the rotary drum 5, the circulation port 4c of the water tank 4, the cooling duct 27, the blower fan 25 and the heater 26, and circulates into the rotary drum 5 from the blowout port 4b.

  The air that has absorbed the moisture of the laundry in the rotating drum 5 is sucked into the cooling duct 27 by the blower fan 25. The air is cooled by being cooled by a cooler 51 provided in the cooling duct 27 while passing through the cooling duct 27. As a result, the air in the cooling duct 27 is dehumidified due to moisture condensation, and the air becomes low humidity and reaches the heater 26.

  The air heated by the heater 26 becomes warm air and is blown into the water tank 4 from the blowout opening 4b, and again comes into contact with the laundry to absorb moisture. It is again sucked into the cooling duct 27 from the circulation port 4a, and is similarly cooled and dehumidified by the cooler 51. By repeating this operation, the drying process is executed.

  Then, the humidity and temperature in the rotary drum 5 are detected by a humidity sensor or a temperature sensor (not shown), and when the predetermined value is reached, the drying process is terminated. Moisture condensed by dehumidification in this drying step descends in the cooling duct 27 and is drained to the outside through the drainage duct 16 from the circulation port 4c.

  As described above, based on the input from the operation panel 11, the control device 2 performs the washing, rinsing, dehydrating, and drying steps continuously or independently according to the set conditions.

  Next, the shielding member concerning this invention is demonstrated, referring FIG.7 and FIG.8. FIG. 7 is an enlarged side view of the periphery of the door packing 10 of the drum type washing machine described above as viewed from the side. FIG. 8 is a diagram illustrating a state in which the shielding member 10 b is viewed from the front vertical direction with respect to the opening 4 a of the water tank 4.

  The drum type washing machine described above is provided with a rib 10b as a shielding member as shown in FIGS. The rib 10b is provided in the peripheral part with respect to the opening 4a of the water tank 4, and is provided so that it may protrude toward the center 4g (yy) direction of the opening 4a. As a result, the rib 10b is positioned closer to the rotating drum 5 than the vibration absorbing annular groove 10a of the door packing 10. Further, the rib 10 b is provided in the water tank 4 so as to be integrated with the door packing 10 at one end where the door packing 10 is attached to the water tank 4.

  Recently, in order to improve the usability, the laundry input port 1a is enlarged and the fluid balancer 5d is mounted on the rotating drum 5 to reduce the vibration, so that the laundry may easily protrude from the rotating drum 5. However, with this configuration, the laundry that protrudes from the rotating drum 5 interferes with the rib 10b at a low speed when the rotating drum 5 starts rotating. Thereby, since the laundry is accommodated in the rotating drum 5, the laundry enters the vibration-absorbing annular groove 10a due to the centrifugal force due to the high-speed rotation in the “dehydration step”, and the clothing rubs the inner peripheral surface of the laundry. It is possible to prevent the door packing 10 from being worn and torn and causing water leakage.

  Further, as shown in FIG. 8, the rib 10b is arranged above the center of the opening 4a of the water tub 4 so that the laundry is not hindered. In addition, when the user stands on the front side of the drum-type washing machine and operates the rib 10b, the opening portion does not appear to be small.

  Further, as shown in FIG. 8, the rib 10b is formed in a shape in which both end portions along the peripheral direction of the opening 4a of the water tank have an angle φ at an acute angle with respect to the radial direction and are tapered. The edge portions at both ends of the rib 10b are formed to have an angle exceeding a right angle.

  Thereby, when the laundry which protruded from the rotating drum 5 interferes with the rib 10b at low speed with rotation of the rotating drum 5, it can be made to interfere more smoothly. Thereby, the laundry is more difficult to be damaged, and the rib 10b is not easily damaged, and can be protected for a long time.

  Note that the edge portions at both ends of the rib 10b are not limited to the shape shown in FIG. 8, and may be formed in a shape that forms a smooth curve so as not to damage the laundry that protrudes from the rotating drum 5. Good.

  The rib 10b is preferably formed of a flexible material such as rubber, and is preferably formed of a material having a hardness of 50 degrees or less (based on a JIS K 6301 hardness test). Thereby, when the laundry which protrudes from the rotating drum 5 interferes, this laundry is hard to be damaged.

  Further, the rib 10 b can be formed of the same material as the door packing 10 and can be formed integrally with the door packing 10.

  Next, another example of the rib 10b will be described with reference to FIG. FIG. 9 is an enlarged side view of the periphery of the door packing 10 of the drum type washing machine provided with other ribs 10b as viewed from the side.

  In the example shown in FIG. 9, the rib 10 b is provided so as to protrude toward the center of the opening 4 a closer to the rotating drum 5 than the vibration absorbing annular groove 10 a, and is rotated from the opening 5 c of the rotating drum 5. It is stepped to enter the inside of the drum.

  That is, in the example of the rib 10b shown in FIG. 9, the front end side with respect to one end of the door packing 10 corresponding to the base end side to which the rib 10b is attached is formed in a step shape, and the portion forming this step shape is the rotating drum 5. It is formed so as to be located inside the rotary drum 5 from the opening 5c.

  As a result, the laundry protruding from the rotating drum 5 interferes with the rib 10b at a low speed when the rotating drum 5 starts to rotate. Thereby, since the laundry can be more effectively stored in the rotating drum 5, the laundry enters the vibration-absorbing annular groove 10a by the centrifugal force due to the high-speed rotation at the “dehydration step”, and the inner peripheral surface thereof. Can prevent the clothing from rubbing, damaging the clothing, and the door packing 10 from being worn and torn to cause water leakage.

  Next, still another example of the rib 10b will be described with reference to FIG. FIG. 10 is a view showing still another example of the rib 10b, and is a view of the rib 10b as viewed from the direction of the central axis (y-axis) of the rotating drum 5 and the water tank 4. FIG. In FIG. 10, the lower side with respect to the rib 10 b corresponds to the inner side direction of the rotating drum 5, and the upper side with respect to the rib 10 b corresponds to the outer side direction with respect to the rotating drum 5.

  In the example shown in FIG. 10, the rib 10 b is formed so as to protrude from the opening 5 c of the rotating drum 5 to the inside of the rotating drum as it goes from the both ends along the peripheral direction of the opening 4 a of the water tank 4 to the center. The

  Thereby, when the laundry which protruded from the rotating drum 5 interferes with the rib 10b at low speed with rotation of the rotating drum 5, it can be made to interfere more smoothly. Thereby, the laundry is more difficult to be damaged, and the rib 10b is not easily damaged, and can be protected for a long time.

  In the above description, when providing the shielding member, the example in which the rib 10b is provided integrally with the door packing 10 is described. However, the shielding member is not necessarily provided integrally with the door packing 10.

  The shielding member should just be provided in the peripheral part with respect to the opening 4a formed in the water tank 4, and the opening 4a of the water tank 4 should just be provided so that it may become smaller than the opening 5c of the rotating drum 5. Thereby, by providing the shielding member, it is possible to prevent the laundry that is about to protrude from the rotating drum 5 from protruding outside the water tub 4, and the laundry enters the vibration absorbing annular groove 10 a of the door packing 10. Can be prevented.

  Furthermore, if the opening 4a of the water tank 4 can be made smaller than the opening 5c of the rotating drum 5, the shielding member need not be provided. That is, by adjusting the size of the opening 4 a formed in the main body portion of the water tank 4, the opening 4 a becomes smaller than the opening 5 c of the rotating drum 5 without providing a separate shielding member from the main body portion of the water tank 4. You may do it. Accordingly, the peripheral portion of the opening 4a of the water tub 4 can prevent the laundry that is about to protrude from the rotating drum 5 from protruding to the outside of the water tub 4, and the laundry is inserted into the vibration absorbing annular groove 10a of the door packing 10. Can be prevented from entering.

It is a perspective view of a drum type washing machine. It is sectional drawing seen from the side surface direction of the drum type washing machine. It is sectional drawing seen from the side surface direction of the drum type washing machine. It is sectional drawing seen from the side surface direction of the drum type washing machine. It is a front view of a drum type washing machine. It is a chart figure showing washing operation of a drum type washing machine. It is a figure which shows the door packing periphery of a drum type washing machine. It is a figure which shows the rib provided in a drum type washing machine. It is a figure which shows the example from which the rib provided in a drum type washing machine differs. It is a figure which shows the example of the further different rib provided in a drum type washing machine. It is sectional drawing of the conventional drum type washing machine. It is a front view of the conventional drum type washing machine. It is a figure which shows the door packing periphery of the conventional drum type washing machine. It is a figure which shows the door packing periphery of the conventional drum type washing machine.

Explanation of symbols

1 Outer box 1a Opening (Laundry input)
2 Control device 3 Door 4 Water tank 4a Opening 4g Center of opening 5 Rotating drum 5c Opening 5d Fluid balancer 6 Suspension device 8 Damping device 9 Drive mechanism 10 Door packing 10a Vibration absorbing annular groove 10b Rib 11 Operation panel 12 Water supply pipe 13 Water supply valve DESCRIPTION OF SYMBOLS 14 Detergent case 15 Water supply nozzle 16 Drain duct 17 Connection case 18 Drain pump 19 Circulation duct 20 Circulation pump 22 Air trap 23 Water level sensor 24 Drying unit 25 Blower fan 26 Heater 27 Cooling duct 40 Vibrating body 51 Cooler

Claims (1)

A rotating drum having a rotating shaft in a direction inclined with respect to a horizontal direction, and an opening formed in the rotating shaft direction so that a diameter of a peripheral edge of the opening is reduced, and the rotating drum containing the rotating drum A water tank having a first opening facing the opening, an outer box containing the water tank and having a second opening facing the first opening of the water tank, and a second opening of the outer box being closed The door is connected to the water tank so that one end surrounds the first opening and the other end is connected to the outer box so as to surround the second opening of the outer box, and the one end and the other end A drum-type washing machine having an annular groove for absorbing vibration between the first and second water tanks, the first opening of the water tank being smaller than the opening of the rotating drum, The peripheral edge of the first opening is in front of the opening of the rotating drum. Together portion forming a stepped shape so as to be positioned inside of the rotary drum is formed, drum portion forming the stepped is characterized in that it is formed to have a surface facing the bottom surface of the rotary drum washing Machine.

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