JP2012061142A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently ensure electrical insulation in a damper allowing damping force to be changed by using a functional fluid which changes its viscosity according to electrical energy applied thereto by energization.SOLUTION: A washing machine includes a damper 21 which energizes coils 38 and 41 to increase damping force. In the machine, the damper 21 is mounted via a mounting part 24 to a base plate 1a of an outer case 1 in such a manner that a lower end 24c of the mounting part 24 is located at a position higher than a height H of a waterproof pan 67 for installation of the washing machine. Thereby, water is prevented from coming into contact with the damper 21 even when the water is accumulated in the waterproof pan 67 due to detachment of a drain hose 16 or other causes, so that electrical insulation can be satisfactorily ensured.

Description

  Embodiments described herein relate generally to a washing machine.

  Conventionally, in a washing machine, especially a drum type washing machine, a water tank is located inside the outer box, and a drum that is a rotating tub is located inside the water tank, and this drum is driven to rotate by a motor outside the water tank. It has come to be. The water tank is elastically supported by a suspension on the bottom plate of the outer box, and a damper for attenuating vibration of the water tank accompanying the vibration of the drum is provided on the suspension. This type of damper is normally used with a constant damping force, but recently there has been an idea of using a variable damping force, and it is thought to use a functional fluid as the working fluid. It has been.

  A functional fluid is a fluid in which rheological properties such as viscosity are functionally changed by controlling physical quantities applied from the outside, and is a magnetorheological fluid and an electric fluid that change in viscosity when electric energy is applied. Includes viscous fluids. Among these, the magnetorheological fluid is, for example, a dispersion of ferromagnetic particles such as iron and carbonyl iron in oil, and when a magnetic field is applied, the ferromagnetic particles form chain clusters. The viscosity of the electrorheological fluid increases when an electric field is applied.

Japanese translation of PCT publication No. 2002-502942 JP 2005-291284 A

The damper using the above-described functional fluid can change the damping force by changing the viscosity of the functional fluid, so that the damping force can be reduced up to the rotational speed at which the water tank resonance appears at the start of the dehydration process. Enlarging it to improve the performance of dehydration rotation by avoiding the occurrence of resonance in the aquarium, and reducing the damping force when the dehydration process thereafter is steady (high-speed rotation), and the vibration of the aquarium is transmitted to the outer box In addition, it is possible to prevent the vibration from being transmitted to the floor surface of the house where the washing machine is installed.
However, as described above, the viscosity of the functional fluid changes due to the application of electrical energy, and it is necessary to take sufficient measures for electrical insulation.

  Accordingly, a washing machine is provided in which the electrical insulation can be sufficiently ensured in the case where the damper uses a functional fluid whose viscosity is changed by application of electrical energy by energization to change the damping force.

  In the washing machine of the present embodiment, the outer box, the water tank located inside the outer box, the rotating tank located inside the water tank and driven to rotate, and the water tank on the bottom plate of the outer box And a suspension having a damper that elastically supports and damps the vibration of the water tank, and the damper changes a damping force by using a functional fluid whose viscosity is changed by application of electrical energy by energization. The lower end portion has an attachment portion, and the damper is attached to the bottom plate at the attachment portion so that the lower end of the attachment portion is positioned higher than the height of the waterproof pan for installing the washing machine. And

The longitudinal cross-sectional view of the principal part of the installation state on the waterproof pan which shows 1st Embodiment Longitudinal side view of the entire washing machine with a part broken away Longitudinal cross section of suspension unit Longitudinal section of the main part Disassembled perspective view of suspension mounting structure FIG. 1 equivalent diagram showing the second embodiment FIG. 1 is an enlarged view corresponding to FIG. 1 showing a third embodiment. Figure equivalent to FIG.

The first embodiment will be described below with reference to FIGS. 1 to 5.
First, FIG. 2 shows the overall structure of the drum type washing machine, and the outer box 1 is an outer shell. The outer box 1 has a rectangular parallelepiped shape, and a laundry doorway 2 is formed at the center of the front surface (right side in FIG. 2) of the outer box 1, and a door 3 for opening and closing the laundry doorway 2 is opened. The box 1 is pivotally supported. In addition, an operation panel 4 is provided at the upper part of the front surface of the outer box 1, and a control device 5 for operation control is provided on the back side (inside the outer box 1).

A water tank 6 is disposed inside the outer box 1. This water tank 6 has a horizontal cylindrical shape whose axial direction is front and rear (right and left in FIG. 2), and is raised upward by a pair of left and right (only one shown) suspensions 7 on a bottom plate 1a of the outer box 1. It is elastically supported in an inclined shape. The detailed structure of the suspension 7 will be described later.
A motor 8 is attached to the back of the water tank 6. In this case, the motor 8 is composed of, for example, a direct current brushless motor, and is an outer rotor type. A rotating shaft (not shown) attached to the center of the rotor 8 a is connected to the inside of the water tank 6 via the bearing housing 9. Is inserted.

  A drum 10 is disposed inside the water tank 6. This drum 10 also has a horizontal cylindrical shape in which the axial direction is front and rear, and by attaching it to the tip of the rotating shaft of the motor 8 at the center of the rear part, the drum 10 is concentric with the water tank 6 and rises forward. I support it. As a result, the drum 10 is rotated by the motor 8, and therefore the drum 10 is a rotating tank, and the motor 8 functions as a rotating tank driving device that rotates the drum 10. .

  A large number of small holes 11 are formed in the circumferential side portion (body portion) of the drum 10 over the entire area. The drum 10 and the water tub 6 both have openings 12 and 13 on the front surface, and the opening 13 of the water tub 6 and the laundry entrance / exit 2 are connected by an annular bellows 14. . As a result, the laundry entrance / exit 2 is connected to the inside of the drum 10 via the bellows 14, the opening 13 of the water tub 6, and the opening 12 of the drum 10.

  A drain hose 16 is connected to the rear part of the bottom, which is the lowest part of the water tank 6, via a drain valve 15. A drying unit 17 is disposed above and in front of the back of the water tank 6. The drying unit 17 includes a dehumidifier 18, a blower 19, and a heater 20. The air is sucked and dehumidified in the drum 10, and then heated and circulated back into the drum 10. As a result, the laundry is dried.

Here, the detailed structure of the suspension 7 will be described. Both suspensions 7 have dampers 21, as shown in FIG. 3, the dampers 21 include a cylinder 22 made of a magnetic material and a shaft 23 made of a magnetic material as main members. Among these, the cylinder 22 has a mounting portion 24 at the lower end portion, and the mounting portion 24 is mainly attached to the bottom plate 1a of the outer box 1, as shown in FIG. 2, to the mounting plate 25, the cushions 26 and 27, and the nut. 28 (detailed later).
On the other hand, the shaft 23 has a mounting portion 23a at the upper end, and the mounting portion 23a is provided with a mounting plate 29, cushions 30, 31, and nuts on the water tank 6, as shown in FIG. 32 (which will also be described in detail later).

  As shown in FIG. 3, a short cylindrical bracket 37 containing a friction ring 33, a ring-shaped upper bearing 34, a lip-shaped seal 35, and a ring-shaped upper yoke 36 is inserted into the uppermost portion of the cylinder 22. And hold it fixed. Of these, the friction ring 33 is made of, for example, polyurethane, the upper bearing 34 is made of, for example, a sintered oil-impregnated metal, and the upper yoke 36 and the bracket 37 are made of a magnetic material.

  An upper bobbin 39 around which an upper coil 38 is wound is inserted and fixedly held at a position immediately below the upper yoke 36 and the bracket 37 of the cylinder 22. A ring-shaped intermediate yoke 40 is press-fitted and fixed at a position directly below the upper bobbin 39 inside the cylinder 22. The intermediate yoke 40 is made of a magnetic material.

  Further, a lower bobbin 42 around which a lower coil 41 is wound is inserted and fixedly held at a position immediately below the intermediate yoke 40 of the cylinder 22. A lower yoke 43 is press-fitted and fixed at a position directly below the lower bobbin 42 of the cylinder 22. The lower yoke 43 is made of a magnetic material and is formed in a short cylindrical shape having a space 44 on the lower side of the inner peripheral portion. In the space 44, a lip-shaped seal 45 and a ring-shaped lower bearing 46 are formed. And is held fixed. The lower bearing 46 is made of, for example, sintered oil-impregnated metal.

  In addition, a seal 47 is provided between the bracket 37 and the upper bobbin 39, a seal 48 is provided between the upper bobbin 39 and the intermediate yoke 40, and a seal 48 is provided between the intermediate yoke 40 and the lower bobbin 42. A seal 49 is provided between the lower bobbin 42 and the lower yoke 43, respectively. These seals 47 to 50 are made of, for example, O-rings.

  Then, the shaft 23 is moved from the upper end opening of the cylinder 22 to the friction ring 33, the upper bearing 34, the seal 35, the upper yoke 36, the upper bobbin 39, the intermediate yoke 40, the lower bobbin 42, the lower yoke 43, the seal 45, and the lower. The bearings 46 are inserted through the cylinder 22 in order. While the inserted shaft 23 is supported by the upper bearing 34 and the lower bearing 46, the friction ring 33, the upper bearing 34, the seal 35, the upper yoke 36, the upper bobbin 39, the intermediate yoke 40, the lower bobbin 42, the lower yoke 43, Reciprocal movement in the axial direction is relatively possible with respect to the seal 45 and the lower bearing 46. Further, a portion below the lower yoke 43 of the cylinder 22 is a cavity 51, and the lower end portion of the shaft 23 reaches the cavity 51 and is prevented from coming off by a retaining ring 52.

  Further, there is a functional fluid between the inserted shaft 23 and each of the upper bobbin 39 and the lower bobbin 42 and between the shaft 23 and the upper yoke 36, the intermediate yoke 40, and the lower yoke 43, which are in the vicinity thereof. In this case, the magnetorheological fluid (MR fluid) 53 is filled.

  As described above, a functional fluid is a fluid whose rheological properties such as viscosity are functionally changed by controlling the physical quantity applied from the outside, and is a fluid whose viscosity changes by application of electrical energy. The magnetorheological fluid 53 and the electrorheological fluid not shown are included. In the present embodiment, the magnetorheological fluid 53 whose viscosity characteristics change according to the strength of the magnetic field (magnetic field) is used. However, the electrorheological fluid (ER fluid) whose viscosity properties change according to the strength of the electric field (electric field). May be used.

  As described above, the magnetorheological fluid 53 is, for example, a dispersion of ferromagnetic particles such as iron and carbonyl iron in oil. When a magnetic field is applied, the ferromagnetic particles are chain-like. The viscosity is increased by forming a cluster, and the seal 35, the seals 47 to 50, and the seal 45 have a function of suppressing leakage of the magnetorheological fluid 53.

  Thus, the damper 21 is configured, and a spring receiving seat 54 is fitted and fixed to the upper portion of the shaft 23 located above the cylinder 22 of the damper 21 so as to face the spring receiving seat 54 and the cylinder 22. A coil spring 55 composed of a compression coil spring surrounding the shaft 23 is mounted between the stepped portion 37a of the bracket 37, thus constituting the suspension 7, and the suspension 7 is connected to the water tank 6 and the outer portion. The water tank 6 is elastically supported on the bottom plate 1 a of the outer box 1 by being assembled between the bottom plate 1 a of the box 1.

  Next, attachment of the lower end portion of the damper 21 will be described in detail. The mounting portion 24 of the cylinder 22 is a separate part from the cylinder 22 and is fixed to the lower end portion of the cylinder 22, and has a protrusion 24 a that protrudes relatively long downward from the cylinder 22. In addition, a male screw 24b is provided at the lower end of the protrusion 24a. Further, as shown in FIG. 4, the cushion 26 is fitted to the protrusion 24 a of the mounting portion 24 via a washer 56. The cushion 26 has a short cylindrical shape, and is provided with a non-circular, short rectangular protrusion 26a around the lower central hole.

  On the other hand, as shown in FIG. 5, the mounting plate 25 has a square hole 25a corresponding to the protrusion 26a of the cushion 26, and the protrusion 26a of the cushion 26 extends upward in the hole 25a. More inserted and engaged. As a result, the cushion 26 is non-rotatably assembled to the mounting plate 25, and as a result, the damper 21 is non-rotatably assembled to the mounting plate 25.

  In FIG. 5, a power supply line 57 for energizing the upper coil 38 and the lower coil 41, a power supply line holder 60 for holding the power supply line 57 on the cylinder 22 by holders 58 and 59, and a power supply line 57 are shown. The retainers 61 and 62 are held on the mounting plate 25, and the damper 21 cannot be rotated with respect to the mounting plate 25, so that the power feeding line 57 held by the damper 21 is twisted by the rotation of the damper 21 and disconnected. It is intended to prevent this from happening.

  On the other hand, below the mounting plate 25, the cushion 27 is fitted into the protrusion 24 a of the mounting portion 24 protruding below the mounting plate 25, and the mounting plate 25 is sandwiched between the cushion 26. ing. The cushion 27 has a short cylindrical shape, and has circular shallow concave portions 27a and 27b (see FIG. 4) in the upper and lower portions around the central hole, and the upper concave portion 27a is formed as a protrusion of the cushion 26. 26a is fitted.

  Then, a washer 63 having a disk shape with substantially the same diameter as the cushion 27 is fitted into the protrusion 24a of the mounting portion 24 that protrudes further downward from the cushion 27, and the mounting portion 24 that protrudes further downward is inserted. The nut 28 is screwed onto the projecting portion 24a (male screw 24b) and tightened. Thus, the lower end portion of the damper 21 is assembled at the mounting portion 24 with cushions 26 and 27 interposed above and below the mounting plate 25. The cushions 26 and 27 are vibration-proof elastic bodies for use in the vibration damping of the damper 21 and the water tank 6, and are both made of rubber which is an electrical insulating material mixed with carbon as a conductive material for adjusting the hardness. Yes.

  And the mounting plate 25 which attached the lower end part of the damper 21 as mentioned above is made into the surrounding standing part 64 of the bottom plate 1a of the said outer box 1 by the some mounting hole 25b shown in FIG. 5 as shown in FIG. For example, it is installed with screws.

Next, attachment of the upper end portion of the shaft 23 will be described in detail. As shown in FIG. 4, the mounting portion 23 a of the shaft 23 is also a separate part from the shaft 23, and is, for example, screwed and joined to the upper end portion of the shaft 23. The washer 65, the cushion 30, the mounting plate 29, the cushion 31, and the washer 66 are sequentially inserted from the upper end to the mounting portion 23a, and the mounting plate 29 is sandwiched between the cushions 30 and 31, and in this state. The nut 32 is screwed and fastened to the upward projecting end of the mounting portion 23a, and the upper end of the shaft 23 is assembled by the mounting portion 23a with cushions 30 and 31 interposed above and below the mounting plate 29.
Then, the mounting plate 29 assembled with the upper end portion of the shaft 23 in this way is attached to an arm portion (not shown) existing on the peripheral side portion of the water tank 6 by, for example, screwing.

  FIG. 1 shows a waterproof pan 67 for installing the washing machine on the floor of the house, that is, for installing the washing machine. As is well known, this waterproof pan 67 has a square planar shape and surrounds the periphery. Height (depth) H (standard 80 [mm] is surrounded by a bank 67a and can store water at the height H, and the tip of the drainage hose 16 of the washing machine is inserted into the bottom. It has a connection port (not shown) for connection.

  FIG. 1 also shows a washing machine placed on the bottom surface of the waterproof pan 67. The bottom plate 1a of the outer box 1 is placed via legs 68 (rear legs in the drawing). With the washing machine installed on the waterproof pan 67, the lower end 24c of the attachment portion 24 of the damper 21 attached to the bottom plate 1a of the outer box 1 has a dimension a (for example, 2 [mm] from the height H of the waterproof pan 67. ], I.e., the damper 21 is attached to the bottom plate 1a of the outer box 1 by the mounting portion 24, and the lower end 24c of the mounting portion 24 is higher than the height of the waterproof pan 67 for installing the washing machine. It is installed so that it is located high.

  Further, FIG. 1 shows the drainage hose 16 piped on the bottom plate 1 a of the outer box 1. As shown in FIG. 1, the mounting height of the damper 21 is the lower end 24 c of the mounting portion 24. However, the height is higher than the drainage hose 16 piped on the bottom plate 1 a of the outer box 1. Although the drain valve 15 is shown in FIG. 2, the mounting height of the damper 21 is set such that the lower end 24 c of the mounting portion 24 is positioned higher than the drain valve 15.

Next, operational effects of the above configuration will be described.
In the washing machine configured as described above, the water tub 6 vibrates mainly in the vertical direction as the drum 10 is folded during washing, dehydration or drying. In response to the vertical vibration of the water tank 6, in the suspension 7, the shaft 23 attached to the water tank 6 expands and contracts the coil spring 55, while the friction ring 33, the upper bearing 34, the seal 35, the upper yoke 36, and the upper bobbin 39. The intermediate yoke 40, the lower bobbin 42, the lower yoke 43, the seal 45, and the lower bearing 46 pass through and reciprocate in the cylinder 22 in the vertical direction.

As described above, when the shaft 23 reciprocates in the vertical direction through the respective parts, the shaft 23, the upper bobbin 39, and the lower bobbin 42, and the shaft 23 and the upper yoke 36 which are in the vicinity thereof, the middle The magnetorheological fluid 53 filled between the yoke 40 and the lower yoke 43 gives a damping force to the suspension 7 by the frictional resistance due to the viscosity, and attenuates the amplitude of the water tank 6.
At this time, the upper and lower coils 38 and 41 of the damper 21 are energized. Then, a magnetic field is generated by the coils 38 and 41, a magnetic field is applied to the magnetorheological fluid 53, and the viscosity of the magnetorheological fluid 53 increases.

  Specifically, when the coils 38 and 41 are energized, a magnetic circuit of the shaft 23 -the magnetic viscous fluid 53 -the upper yoke 36 -the bracket 37 -the cylinder 22 -the intermediate yoke 40 -the magnetic viscous fluid 53 -the shaft 23 is generated. The shaft 23-the magnetorheological fluid 53-the intermediate yoke 40-the cylinder 22-the lower yoke 43-the magnetorheological fluid 53-the magnetic circuit of the shaft 23 is generated, and the viscosity of the magnetorheological fluid 53 where the magnetic flux passes is increased. In particular, the viscosity of each magnetorheological fluid 53 between the shaft 23 having a high magnetic flux density and the upper yoke 36, between the intermediate yoke 40 and the shaft 23, and between the lower yoke 43 and the shaft 23 is increased, and the friction resistance is increased. To increase.

  Thus, by increasing the frictional resistance when the cylinder 22 vibrates in the vertical direction with the above-described components, particularly the upper and lower coils 38 and 41, the upper yoke 36, the intermediate yoke 40, and the lower yoke 43, Damping force increases. Thereby, it is difficult to generate vibration in the water tank 6.

Now, in the washing machine having the damper 21 that energizes the coils 38 and 41 to increase the damping force in this way, the damper 21 is attached to the bottom plate 1a of the outer box 1 by the attachment portion 24, and the lower end 24c of the attachment portion 24 is provided. The waterproof pan 67 for installing the washing machine is attached to be higher than the height H.
Thereby, even if water is stored in the waterproof pan 67 due to the disconnection of the drainage hose 16 or other reasons, it is possible to avoid the water from touching the damper 21 and to ensure good electrical insulation. it can.

  In addition, in the washing machine configured as described above, the mounting height of the damper 21 is set such that the lower end 24c of the mounting portion 24 is positioned higher than the drainage hose 16 piped on the bottom plate 1a of the outer box 1. Thereby, even if the drainage hose 16 is detached and water comes out around it, it is still possible to prevent the water from touching the damper 21 and to ensure good electrical insulation.

  6 to 8 show the second and third embodiments. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Only the part is described.

[Second Embodiment]
In the second embodiment shown in FIG. 6, a drain hole 71 is provided at a position immediately below the portion of the bottom plate 1 a of the outer box 1 where the damper 21 is attached. More specifically, the bottom plate 1 a of the outer box 1 has a bag-like portion 72 that accommodates from the lower end 24 c of the mounting portion 24 of the damper 21 to the middle portion of the cushion 27 immediately below the portion where the damper 21 is mounted. A plurality of holes are formed in the bottom of the bag-like portion 72, and the drain holes 71 are formed. The drain hole 71 may be formed by opening the bottom plate 1a of the outer box 1 directly below the portion where the damper 21 is attached, so that the opening is open.

By doing in this way, even if the water which flows down by dew condensation on the inner surface of the outer box 1 etc. reaches directly under the damper 21, it falls out of the drain hole 71 and does not accumulate. Therefore, it is possible to prevent the condensed water flowing down to the damper 21 from coming into contact, and it is possible to ensure good electrical insulation.
In the second embodiment, the mounting height of the damper 21 is set such that the lower end 24c of the mounting portion 24 is positioned higher than the drainage hose 16 piped on the bottom plate 1a of the outer box 1. May be implemented.

[Third Embodiment]
In the third embodiment shown in FIGS. 7 and 8, an electrical insulating sheet 81 is interposed between the cushion 26 and the mounting plate 25 at the lower end portion of the damper 21, and the electric power is supplied between the cushion 27 and the mounting plate 25. An insulating sheet 82 is interposed. The electrical insulating sheets 81 and 82 are made of, for example, PET (polyethylene terephthalate), and have disk shapes that are slightly larger in diameter than the cushions 26 and 27, respectively.

  By doing in this way, even if dew condensation occurs from the inner surface of the outer box 1 to the surface of the mounting plate 25, the electrical insulating sheets 81 and 82 electrically insulate the mounting plate 25 and the cushions 26 and 27 from each other. Further, electrical conduction between the damper 21 and the outer box 1 via the mounting plate 25 is avoided, and electrical insulation can be ensured satisfactorily.

  In this case, if the cushions 26 and 27 are made of an electrical insulating material not containing a conductive material such as carbon as described above, for example, made of silicon rubber, the hardness can be appropriately obtained and the electrical insulating property against condensation can be similarly secured. Can do. However, the electrical insulating material of the cushions 26 and 27 may be any material as long as it substantially exhibits electrical insulation, and may contain a small amount of conductive material, for example. That is, the electrical insulating material of the cushions 26 and 27 is not limited to the one that does not include the conductive material at all, as long as the cushions 26 and 27 do not include the conductive material. Any material that does not substantially contain an insulating material may be used.

  Further, in the embodiment in which the cushions 26 and 27 are made of an electrical insulating material not including a conductive material, and the third embodiment, the mounting height of the damper 21 is set so that the lower end 24c of the mounting portion 24 is It may be carried out except that the height is higher than the drainage hose 16 piped on the bottom plate 1a, or may be carried out in combination with the second embodiment.

The washing machine as a whole is not limited to the drum type, and can be similarly applied to a vertical washing machine having a water tank and a rotating tank in the vertical axis shape, and even if it does not have a drying function. In addition, some embodiments of the present invention have been described. However, these embodiments are presented as examples, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 1 is an outer box, 1a is a bottom plate of the outer box, 6 is a water tank, 7 is a suspension, 10 is a drum (rotary tank), 16 is a drain hose, 21 is a damper, 24 is a mounting portion, and 24c is a mounting portion. Lower end, 25 is a mounting plate, 26 and 27 are cushions (vibration-proof elastic bodies), 53 is a magnetorheological fluid (functional fluid), 67 is a waterproof pan, H is the height of the waterproof pan, 71 is a drain hole, 81 , 82 indicate electrical insulating sheets.

Claims (5)

An outer box,
A water tank located inside the outer box,
A rotating tub located inside the aquarium and driven to rotate;
A suspension having a damper that elastically supports the water tank on a bottom plate of the outer box and damps vibration of the water tank;
The damper changes the damping force using a functional fluid whose viscosity is changed by application of electrical energy by energization, and has a mounting portion at a lower end portion,
The washing machine, wherein the damper is attached to the bottom plate of the outer box at the attachment portion so that the lower end of the attachment portion is higher than the height of the waterproof pan for installing the washing machine.   The washing machine according to claim 1, wherein the mounting height of the damper is set such that the lower end of the mounting portion is positioned higher than the drainage hose piped on the bottom plate of the outer box.   The washing machine according to claim 1 or 2, wherein a drain hole is provided at a position immediately below a portion of the bottom plate of the outer box where the damper is attached.   The lower end of the damper is assembled by attaching an anti-vibration elastic body to the mounting plate attached to the bottom plate of the outer box, and an electric insulating sheet is interposed between the anti-vibration elastic body and the mounting plate. The washing machine according to any one of claims 1 to 3, wherein:   The lower end of the damper is assembled with an anti-vibration elastic body interposed between a mounting plate attached to the bottom plate of the outer box, and the anti-vibration elastic body is made of an electrical insulating material that does not include a conductive material. The washing machine according to any one of claims 1 to 3.

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