Clothes treatment equipment

Abstract

The present invention relates to a clothing treatment device comprising: a cabinet having an input port; a tub provided inside the cabinet to provide a space for storing water and having a tub input port connected to the input port; a drum provided rotatably inside the tub to provide a space for storing clothes to be supplied to the tub input port; a balancer provided in a ring shape surrounding the center of rotation of the drum and having a base fixed to the drum, a ring-shaped first surface provided along the outer edge of the base, a second surface provided in a ring shape along the inner edge of the base to form a circulation path together with the base and the first surface, and a ball movable along the circulation path; and a fastening portion provided on the base to fix the balancer to the drum.

Description

[Technical Field]

[0001] The present invention relates to a laundry treatment device. [Background technology]

[0002] A clothing processing device is a general term for a device that washes or dries clothing, and the objects that a clothing processing device washes or dries (processing objects) are not limited to clothing but include all items that can be washed or dried.

[0003] A laundry treatment device includes a tub for storing water, a water supply unit for supplying water to the tub, a drainage unit for discharging water from the tub, a drum provided inside the tub to provide a space for storing clothes (to be treated), and a communication hole (hole) provided in the drum to allow the water stored in the tub to flow into the interior of the drum.

[0004] The clothing treatment device with the above-described structure removes foreign objects from the clothing inside the drum by rotating the drum inside a tub containing water. When foreign objects are to be removed from the clothing, the water inside the tub is drained from the tub through the drainage section, and the drum is rotated inside the tub from which the water has been drained to remove the water from the clothing.

[0005] During the above process, vibrations may occur in the drum. This is because if the drum rotates at high speed with clothes densely packed in a certain area of the drum, the drum will rotate in a state where dynamic equribrium or dynamic balance is broken.

[0006] In a clothing treatment device, dynamic balance occurs when the mass distribution of the clothes around the drum's rotation axis is within an acceptable range (when the drum rotates while vibrating within the acceptable range), while dynamic imbalance occurs when the mass distribution around the drum's rotation axis is outside the acceptable range (when the drum vibrates outside the acceptable range). When the drum rotates in an unbalanced state, the vibrations generated in the drum vibrate not only the tub but the entire clothing treatment device, causing problems such as noise and reduced durability.

[0007] To control imbalance, conventional clothing treatment devices have attached a balancer to the drum (U.S. Patent No. US8,522,580). The balancer included in conventional clothing treatment devices includes at least one of a front balancer attached to the front surface of the drum where the drum inlet is provided, and a rear balancer attached to the rear surface of the drum where the rotation shaft is fixed.

[0008] The front balancer and rear balancer are ring-shaped and include a body fixed to the front or rear surface of the drum, a circulation path provided inside the body, and a ball that moves along the circulation path. When the drum rotates in an unbalanced state, its rotation speed changes depending on the position of the clothes that cause the imbalance, and when the rotation speed of the drum slows (when the centrifugal force acting on the ball decreases), the ball moves in the opposite direction to the position of the clothes that cause the imbalance, thereby reducing the eccentricity of the drum.

[0009] The front balancer is provided in a ring shape having an inner circumferential surface close to the drum inlet and an outer circumferential surface close to the circumferential surface of the drum, and the rear balancer is provided in a ring shape having an inner circumferential surface close to the rotation axis of the drum and an outer circumferential surface close to the circumferential surface of the drum.

[0010] The balancer having the above-described structure is fixed to the drum by bolts connecting the outer circumferential surface to the circumferential surface of the drum. When the drum rotates, centrifugal force acting in the radial direction of the drum is input to the balls. Therefore, fixing the outer circumferential surface of the balancer to the circumferential surface of the drum is advantageous in preventing deformation of the body.

[0011] However, the method of fixing the outer circumferential surface of the body to the circumferential surface of the drum requires a fixing member to which the fastener is fixed, and this structure reduces the diameter of the circulation path, which reduces the centrifugal force acting on the balls. The reduced centrifugal force acting on the balls means that it takes a longer time to resolve the imbalance of the drum.

[0012] On the other hand, the conventional rear balancer (US Patent No. 7,975,514) inserts the balancer body into a groove formed on the rear surface of the drum, and fixes the body to the groove with a shaft fixing part provided on the rear surface of the drum to which the drum's rotation shaft is fixed. Although a balancer with this structure can avoid the above-mentioned disadvantages, it has the disadvantage of reducing the volume of the drum (the disadvantage that the processing capacity is limited by the balancer). Summary of the Invention [Problem to be solved by the invention]

[0013] SUMMARY OF THE INVENTION An object of the present invention is to provide a clothes treating device equipped with a balancer that can quickly correct an imbalance in the drum.

[0014] SUMMARY OF THE INVENTION An object of the present invention is to provide a clothes treating device having a balancer that can minimize a reduction in the volume of a drum and maximize the centrifugal force acting on a ball.

[0015] SUMMARY OF THE INVENTION An object of the present invention is to provide a clothes treating device equipped with a balancer that can minimize a decrease in durability due to centrifugal force acting on a ball. [Means for solving the problem]

[0016] The present invention provides a clothing treatment device that includes (comprises; constitutes; constructs; sets; encompasses; contains; contains) a cabinet with an input port; a tub that is provided inside the cabinet and provides a space for storing water, and has a tub input port connected to the input port; a drum that is rotatably provided inside the tub and provides a space for storing clothing to be supplied to the tub input port; a balancer that is ring-shaped around the center of rotation of the drum and is fixed to the drum, has a ring-shaped first surface provided along the outer edge of the base, has a ring-shaped second surface provided along the inner edge of the base and forms a circulation path together with the base and the first surface, and has balls that can move along the circulation path; and a fastening portion that is provided on the base and fixes the balancer to the drum.

[0017] The drum includes a cylindrical drum body located inside the tub; a front cover located on the drum body toward the tub insertion port; a rear cover located opposite the front cover; a communication hole formed to penetrate the drum body; and a drum insertion port formed to penetrate the front cover and through which clothes are introduced (applied: introduced: inserted) into the drum body; and the balancer is fixed to the front cover.

[0018] The fastening portion includes a fixing body provided on the base; and a fastening body that fixes the fixing body to at least one of the drum body and the front cover.

[0019] The height of the uppermost end of the fixed body is set to be lower than the height of the uppermost end of the first surface.

[0020] The front cover includes a front cover body in which the drum inlet is provided; a front mounting portion in the form of a ring on the front cover body surrounding the drum inlet and to which the base is attached; and a front connecting portion extending from the front mounting portion and contacting the drum body; and the fixing body and the front connecting portion are fixed to the drum body by the fastening body.

[0021] The fixing body is provided to protrude from the base toward the front mounting portion, and the front mounting portion is provided with a front mounting groove for receiving the fixing body.

[0022] The fixing member further includes a first extension portion extending from the first surface toward the front mounting portion, and the fixing member is configured to connect the first extension portion and the base portion.

[0023] The clothing treatment device further includes a first connecting surface located at the corner (point) where the first surface and the base are connected and curved from the base toward the first body; and a first support portion having one end fixed to the first extension portion and the other end fixed to the first connecting surface, maintaining a distance between the first extension portion and the first connecting surface.

[0024] The clothing treatment device further includes a protrusion protruding from the second surface toward the drum inlet.

[0025] The clothing treatment device further includes a second connecting surface located at the corner where the second surface and the base are connected and curved from the base toward the direction where the second body is located; a second extension portion extending from the protrusion toward the front mounting portion and having a ring shape surrounding the drum inlet; and a second support portion having one end fixed to the second extension portion and the other end fixed to the second connecting surface, maintaining a gap between the second extension portion and the second connecting surface.

[0026] The distance from the protruding portion to the free end of the extending portion is set to at least half the distance from the protruding portion to the outer peripheral surface of the base portion.

[0027] The support portion further includes an inclined portion connecting the free end of the extension portion to the connecting surface.

[0028] The thickness of the second extension portion is set to be equal to or less than the thickness of the second surface.

[0029] The drum includes a cylindrical drum body located inside the tub; a front cover located on the drum body toward the tub insertion port; a rear cover located opposite the front cover; a communication hole formed to pass through the drum body; and a drum insertion port formed to pass through the front cover and for introducing clothes into the drum body; and the balancer is fixed to the rear cover.

[0030] The fastening portion includes a rear fixing body provided on the base; and a rear fastening body that fixes the rear fixing body to at least one of the drum body and the rear cover.

[0031] The height of the uppermost end of the rear fixing body is set to be lower than the height of the uppermost end of the first surface.

[0032] The garment treatment device further includes a drive unit that rotates the drum using a drive shaft fixed to the rear cover, and the rear cover includes a rear cover body to which the drive shaft is fixed; a rear mounting portion that is provided in the shape of a ring on the rear cover body surrounding the drive shaft and provides a space for mounting the base; and a rear connecting portion that extends from the rear mounting portion and contacts the drum body, and the rear fixing body and the rear connecting portion are fixed to the drum body by the rear fastening body.

[0033] The present invention provides a clothing treatment device including a drum having a cylindrical drum body, a front cover forming the front surface of the drum body, a rear cover forming the rear surface of the drum body, a communication hole formed to pass through the drum body, and a drum inlet formed to pass through the front cover and through which clothing is introduced into the drum body; a drive unit that rotates the drum; a first body part that is formed in a ring shape surrounding the drum inlet and has a base part positioned in a direction toward the front cover, a ring-shaped first surface formed along the outer edge of the base, and a ring-shaped second surface formed along the inner edge of the base; a second body part that closes a circulation path formed by the first surface, the second surface, and the base; a ball that is movable along the circulation path; and a fastening part that has a fixed body provided on the base and a fastening body that fixes the fixed body to at least one of the drum body and the front cover.

[0034] The present invention relates to a cabinet having an inlet; a tub provided inside the cabinet to provide a space for storing water and having a tub inlet connected to the inlet; a cylindrical drum body located inside the tub; a front cover located on the drum body in a direction toward which the tub inlet is provided; a rear cover provided at a position opposite to the front cover; a drum having a communication hole provided to pass through the drum body and a drum inlet provided to pass through the front cover and for introducing clothes into the drum body; a drive for rotating the drum a first body part having a base part in a ring shape surrounding the drum inlet and positioned in a direction toward the front cover, a first ring-shaped surface provided along the outer edge of the base, and a second ring-shaped surface provided along the inner edge of the base; a second body part that closes a circulation path formed by the first surface, the second surface, and the base; a ball that is movable along the circulation path; and a fastening part having a fixed body provided on the base and a fastening body that fixes the fixed body to at least one of the drum body and the front cover.

[0035] The front cover includes a front cover body in which the drum inlet is provided; a front mounting portion in the shape of a ring on the front cover body surrounding the drum inlet and to which the base is attached; and a front connecting portion extending from the front mounting portion and contacting the drum body; and the fixing body and the front connecting portion are fixed to the drum body by the fastening body.

[0036] The front attachment portion is provided as a groove formed by bending the front cover body toward the rear cover.

[0037] The fixing body is provided to protrude from the base toward the front mounting portion, and the front mounting portion is provided with a front mounting groove for receiving the fixing body.

[0038] The clothing treatment device further includes a first connecting surface located at the corner where the first surface and the base are connected and curved from the base toward the first body portion; and a first extension portion extending from the first surface toward the front mounting portion; and the fixed body is configured to connect the first extension portion and the base.

[0039] The distance from the second body to the free end of the first extension is set equal to the distance from the second body to the outer circumferential surface of the base.

[0040] The clothing treatment device further includes a fixed body support configured to connect the first extension portion, the fixed body, and the base portion.

[0041] The clothing treatment device further includes a first support portion having one end fixed to the first extension portion and the other end fixed to the first connecting surface, maintaining a distance between the first extension portion and the first connecting surface.

[0042] The first support portion includes a plurality of ribs (first support plates) spaced apart at equal intervals from each other based on the center of the drum inlet.

[0043] The clothing treatment device further includes a protrusion protruding from the second surface toward the drum inlet.

[0044] The clothing treatment device further includes a second connecting surface located at the corner where the second surface and the base are connected and curved from the base toward the direction where the second body is located; a second extension portion extending from the protrusion toward the front mounting portion and having a ring shape surrounding the drum inlet; and a second support portion having one end fixed to the second extension portion and the other end fixed to the second connecting surface, maintaining a gap between the second extension portion and the second connecting surface.

[0045] The distance from the protruding portion to the free end of the second extending portion is set to be equal to or greater than half the distance from the protruding portion to the outer peripheral surface of the base portion.

[0046] The second support portion further includes an inclined portion connecting the free end of the second extension portion to the second connecting surface.

[0047] The second support portion is composed of a plurality of ribs (second support plates) spaced at equal intervals from each other based on the center of the drum inlet, and each rib is provided at a position spaced 7 to 15 degrees from the center of the base.

[0048] The thickness of the second extension portion is set to be equal to or less than the thickness of the second surface.

[0049] The thickness of the second extension portion is set to 0.7 to 0.9 times the thickness of the second surface.

[0050] The height of the second support portion connecting the second surface and the second extension portion is set to be 0.3 times or more the distance from the protrusion portion to the free end of the second extension portion.

[0051] The thickness of the second support portion is set to 1 / 2 the thickness of the second surface.

[0052] The present invention relates to a cabinet having an inlet; a tub provided inside the cabinet to provide a space for storing water and having a tub inlet connected to the inlet; a cylindrical drum body located inside the tub; a front cover located on the drum body in the direction of the tub inlet; a rear cover provided at a position opposite to the front cover; a drum having a communication hole formed to pass through the drum body and a drum inlet formed to pass through the front cover and for introducing clothes into the drum body; a drive unit that rotates the drum by a drive shaft fixed to the rear cover; The clothing treatment device includes a rear first body portion having a rear base portion in a ring shape surrounding a drive shaft and positioned in a direction toward the rear cover, a ring-shaped rear first surface provided along the outer edge of the rear base, and a ring-shaped rear second surface provided along the inner edge of the base; a rear second body portion that closes a rear circulation path formed by the rear first surface, the rear second surface, and the rear base; a ball that is movable along the rear circulation path; and a rear fastening portion that has a rear fixing body provided on the rear base and a rear fastening body that fixes the rear fixing body to at least one of the drum body and the rear cover.

[0053] The rear cover includes a rear cover body to which the drive shaft is fixed; a rear mounting portion that is provided in the rear cover body in the shape of a ring surrounding the drive shaft and provides a space in which the rear base is attached; and a rear connecting portion that extends from the rear mounting portion and contacts the drum body; and the rear fixing body and the rear connecting portion are fixed to the drum body by the rear fastening body.

[0054] The rear fixing body is provided to protrude from the rear base portion toward the rear mounting portion, and the rear mounting portion is provided with a rear mounting groove in which the rear fixing body is received.

[0055] The present invention relates to a cabinet having an input port; a tub provided inside the cabinet to provide a space for storing water and having a tub input port connected to the input port; a cylindrical drum body located inside the tub, a front cover located on the drum body in the direction of the tub input port, a rear cover located opposite the front cover, a drum having a communication hole formed to pass through the drum body and a drum input port formed to pass through the front cover and for introducing clothes into the drum body; a drive unit that rotates the drum by a drive shaft fixed to the rear cover; a first body part having a base portion formed in a ring shape surrounding the drum input port and positioned in a direction toward the front cover, a ring-shaped first surface formed along the outer edge of the base, and a ring-shaped second surface formed along the inner edge of the base; a second body that closes a circulation path formed by the base and the drive shaft; a ball that can move along the circulation path; and a fastening unit that has a fixed body provided on the base and a fastening body that fixes the fixed body to at least one of the drum body and the front cover; a rear first body that is provided in a ring shape surrounding the drive shaft and is positioned in a direction toward the rear cover, a ring-shaped rear first surface that is provided along the outer edge of the rear base, and a ring-shaped rear second surface that is provided along the inner edge of the base; a rear second body that closes a rear circulation path formed by the rear first surface, the rear second surface, and the rear base; a ball that can move along the rear circulation path; and a rear fastening unit that has a rear fixed body provided on the rear base and a rear fastening body that fixes the rear fixed body to at least one of the drum body and the rear cover. [Effects of the Invention]

[0056] The present invention provides a clothes treatment device equipped with a balancer that can quickly correct an imbalance in the drum.

[0057] The present invention provides a clothes treating device having a balancer that can minimize the reduction in the volume of the drum and maximize the centrifugal force acting on the ball.

[0058] The present invention provides a clothes treating device equipped with a balancer that can minimize a decrease in durability due to centrifugal force acting on a ball. [Brief explanation of the drawings]

[0059] [Figure 1] 1 shows an example of a clothing treatment device. [Figure 2] An example of a drum is shown. [Figure 3-6] An example of a balancer is shown. [Figure 7] 10 is a graph showing changes in the rigidity of a second reinforcing portion depending on the length ratio between a second surface and a second extension portion provided in a balancer. [Figure 8] An example of a rear balancer is shown. [Figure 9] 1 shows an example of a coupling structure of a front balancer, a drum, and a rear balancer. DETAILED DESCRIPTION OF THE INVENTION

[0060] Hereinafter, an embodiment of a clothing processing device will be described in detail with reference to the accompanying drawings.

[0061] The clothing treatment device 100 shown in Figure 1 includes a cabinet 1, a tub 2 provided inside the cabinet to provide a space for storing water, and a drum 7 provided rotatably inside the tub to provide a space for storing clothing.

[0062] The cabinet 1 is provided to form the exterior of the clothing treatment device 100. One side of the cabinet is provided with an inlet 11 for introducing clothing into the tub 2, and FIG. 1 shows an example in which the inlet 11 is provided on the front side of the cabinet 1 (the side facing the front of the clothing treatment device).

[0063] The input port 11 is opened or closed by a door 13 rotatably fixed to the cabinet 1. A control panel 15 is provided in the space above or below the input port 11 on the front surface of the cabinet 1.

[0064] The control panel 15 is provided with an input unit 151 and a display unit 153. The input unit 151 is a means for inputting control commands to a control unit (not shown) via the control panel, and the display unit 153 is provided as a means for displaying control commands selectable by the input unit and for displaying execution information for a control command selected by the input unit.

[0065] The tab 2 is provided as a hollow cylindrical tab body 21. The tab body 21 is fixed to the inside of the cabinet 1 by a tab support part, and Fig. 1 shows an example in which the tab support part is provided with a damper 22 and a spring 23.

[0066] The damper 22 is provided to absorb vibrations of the tab body 21 and is connected to a lower region of the tab body 21 and the bottom surface of the cabinet 1. The spring 23 is a means for providing a restoring force that moves the tab body 21 to its initial position when an external force input to the tab body 21 is removed (when the tab body does not vibrate).

[0067] The spring 23 may be provided to connect the upper region of the tab body 21 (the space located above a horizontal line passing through the center of the tab body) to the upper surface of the cabinet 1, or may be provided to connect the lower region of the tab body 21 to the bottom surface of the cabinet 1.

[0068] As the volume of the tub body 21 increases (as the processing capacity of the clothing processing device increases), it is more advantageous to control the vibration of the tub body 21 if both the damper 22 and the spring 23 are provided to connect the lower region of the tub body 21 to the cabinet.

[0069] A tab insertion opening 211 is provided on the front surface of the tab body 21. The tab insertion opening 211 is provided to be connected to the insertion opening 11. In FIG. 1, the tab insertion opening 211 is shown as being directly connected to the insertion opening 11, but the tab insertion opening 211 and the insertion opening 11 may be connected via a corrugated tube made of rubber or the like (if a tab support part having the above-described structure is provided, the corrugated tube may be omitted).

[0070] A heater 24 may be provided inside the tub body 21 to heat the water stored in the tub body 21.

[0071] Water is supplied to the tub 2 by a water supply unit 3, and the water stored in the tub is discharged to the outside of the cabinet 1 by a drainage unit 4.

[0072] The water supply section 3 consists of water supply pipes 31 and 32 that connect the water supply source and the tub body 21, and a water supply valve 33 that opens and closes the water supply pipes, and the drainage section 4 consists of a drainage pipe 41 that directs water inside the tub body 21 to the outside of the cabinet 1, and a drainage valve 42 that controls the opening and closing of the drainage pipe 41.

[0073] The laundry treatment device 100 may further include a detergent supply unit to supply detergent to the tub body 21. The detergent supply unit may include at least one of a first supply unit 5 and a second supply unit 6, and FIG. 1 shows an example in which both the first supply unit 5 and the second supply unit 6 are provided.

[0074] The first supply unit 5 is configured to include a drawer 51 that is configured to be pulled out from the cabinet 1 and provides a space in which detergent is stored, and a drawer housing 52 that is configured inside the cabinet and provides a space in which the drawer 51 is stored.

[0075] A drawer opening for the drawer 51 to enter and exit is provided on one side of the cabinet 1, and FIG. 1 shows the drawer opening provided on the front side of the cabinet 1.

[0076] The drawer 51 includes a chamber 511 that provides a space for storing detergent, and a chamber outlet 512 that discharges the detergent inside the chamber 511 into the drawer housing 52. The chamber 511 has an open top, and the chamber outlet 512 is provided as a water trap (siphon flow path) that discharges the liquid inside the chamber into the drawer housing when the water level inside the chamber 511 exceeds a set water level.

[0077] Water is supplied to the drawer 51 through a nozzle 54 (located above the chamber) provided to form the upper surface of the drawer housing 52, and liquid discharged into the drawer housing 52 through the chamber outlet 512 is discharged from the drawer housing 52 through the housing outlet 53. In this case, the water supply pipe includes a first water supply pipe 31 connecting the nozzle 54 to a water source and a second water supply pipe 32 connecting the housing outlet 53 to the tub body 21. The water supply valve 33 is preferably provided on the first water supply pipe 31.

[0078] The second supply unit 6 is configured to supply detergent to the tub 2 through the second water supply pipe 32 .

[0079] The second water supply pipe 32 includes a first hose 321 connected to the housing outlet 53, a second hose 322 connected to the rear surface of the tub body 21, and a connector 323 connecting the two hoses. In this case, the second supply unit 6 includes a detergent reservoir 61 in which liquid detergent is stored, a supply pipe 62 connecting the detergent reservoir 61 to the connector 323, and a pump 63 that moves the detergent in the detergent reservoir 61 to the connector 323 through the supply pipe 62.

[0080] The second supply unit 6 is configured to determine the amount of detergent required according to the amount of laundry (cloth amount) put into the drum 7, and to transfer the determined amount of detergent to the connector 323. For example, the amount of laundry is determined by the control unit from the amount of power supplied to the driving unit 76 to rotate the drum 7 to a preset angle, and the control unit controls the pump 63 to transfer an amount of detergent (an appropriate amount of detergent according to the amount of laundry) set by experiment to the connector 323.

[0081] The drum 7 includes a cylindrical drum body 71 located inside the tub 2, a front cover 72 located on the drum body 71 in the direction of the tub insertion port 211 (forming the front surface of the drum), and a rear cover 73 located opposite the front cover 72 and forming the rear surface of the drum.

[0082] The drum body 71 is provided with a plurality of communication holes 711 so that the water stored in the tub 2 can be supplied to the inside of the drum 7, and the front cover 72 is provided with a drum input port 722 which introduces the clothes fed into the tub input port 211 into the inside of the drum body 71.

[0083] A lifter 712 is provided inside the drum body 71. The lifter 712 is provided in a shape that protrudes from the circumferential surface of the drum body 71 toward the rotation center of the drum body 71. When the drum 7 rotates, the clothes are repeatedly raised and dropped inside the drum 7 by the lifter 712, and this process promotes the separation of foreign matter from the clothes.

[0084] The larger the volume of the drum 7 (the larger the processing capacity of the laundry treatment device), the greater the load (friction between the water stored in the tub and the drum, the weight of the clothes stored inside the drum, etc.) that is applied to the drum 7. To prevent a decrease in the durability of the drum 7 (to prevent distortion of the drum, separation of the front cover and rear cover from the drum body, etc.), the drum 7 further includes a fixing shaft 74 that fixes the front cover 72 and rear cover 73 to the drum body 21.

[0085] The fixed shaft 74 is provided as a bar having one end fixed to the front cover 72 and the other end fixed to the rear cover 73. The fixed shaft 74 is provided to pass through the lifter 712 so that the fixed shaft 74 is not exposed inside the drum body 71.

[0086] The drum 7 is rotated by the driving unit 76. The driving unit 76 is composed of a driving shaft 761 fixed to the rear cover 73 and a motor 767 that supplies power required for the rotation of the driving shaft 761.

[0087] The drive shaft 761 is provided to pass through the rear surface of the tab body 21. In this case, the drive shaft 761 is provided to be parallel to the bottom surface of the cabinet 1 or to be inclined at an angle of less than 90 degrees with respect to the bottom surface of the cabinet.

[0088] The drive shaft 761 is directly connected to the motor 767. That is, when the motor 767 is fixed to the rear surface of the tub 2 and includes a stator that forms a rotating magnetic field and a rotor that rotates due to the rotating magnetic field, the drive shaft 761 has one end fixed to the rear cover 73 and the other end fixed to the rotor.

[0089] As shown, the drive shaft 761 may be provided so that the power provided by the motor 767 is transmitted by a pulley and a belt. In this case, a driving pulley 765 is provided on the rotation shaft of the motor 767, a driven pulley 764 is provided on the drive shaft 761, and the two pulleys 765 and 764 are connected via a belt 766.

[0090] The drive shaft 761 is fixed to the rear cover 73 by a shaft fixing portion 762 .

[0091] If the drive shaft 761 is fixed directly to the center of the rear cover 73 without any additional device, stress may be concentrated at the center of the rear cover 73, which may reduce the durability of the rear cover 73. The shaft fixing part 762 is a means for reducing the above-mentioned risk, and is provided as a disk-shaped plate having a diameter smaller than that of the rear cover 73.

[0092] The drive shaft 761 is provided to pass through the rear surface of the tub 2 and connect the shaft fixing portion 762 and the driven pulley 764, and a bearing 763 is provided on the rear surface of the tub 2 to rotatably fix the drive shaft 761 to the tub 2.

[0093] Although not shown, the drive shaft 761 is provided perpendicular to the bottom surface of the cabinet 1. In this case, the input port is provided on the top surface of the cabinet 1, and the tub and drum need to be restructured so that the tub input port and drum input port face the input ports located on the top surface of the cabinet 1.

[0094] The drum 7 generates vibrations when it rotates. If the drum 7 rotates at high speed with clothes densely packed in a predetermined area of the drum body 71, the drum 7 rotates in a state where dynamic equribrium or dynamic balance is broken.

[0095] Dynamic balance in a clothing treatment device can be defined as the state in which the mass distribution of the clothes around the rotation axis of the drum is within an acceptable range when the drum rotates. In other words, when the mass distribution around the rotation axis of the drum is out of the acceptable range (the drum vibrates out of the acceptable range), this state is considered to be a dynamic imbalance, and is usually called an unbalance state.

[0096] If the drum rotates in an unbalanced state, vibrations generated in the drum will vibrate not only the tub but also the entire laundry treatment device, causing problems of noise and reduced durability.

[0097] To eliminate (control) the imbalance of the drum, the laundry treatment device 100 may further include balancers 8 and 9.

[0098] 1 and 2 show an example in which the balancer is provided to include both a front balancer 8 fixed to the front surface (front cover) 72 of the drum and a rear balancer 9 fixed to the rear surface (rear cover) 73 of the drum. Although not shown, the balancer may be provided as only one of the front balancer 8 and the rear balancer 9.

[0099] 2, the front balancer 8 is fixed to the drum body 71 or the front cover 72 and includes ring-shaped body portions 81 and 82 surrounding the drum input port 722. The body portions include a first body portion 81 (front first body portion) fixed to the drum 71, a second body portion 82 (front second body portion) fixed to the first body portion, and a through-hole 83 (front through-hole) that penetrates the first and second body portions and through which the drum input port 722 passes.

[0100] As shown in Figure 3, the first body 81 includes a ring-shaped base 813 (front base) surrounding the drum inlet 722, a ring-shaped first surface 811 (front first surface) provided along the outer edge of the base 813, and a ring-shaped second surface 812 (front second surface) provided along the inner edge of the base 813.

[0101] The base 813 is provided as a ring-shaped flat surface facing the position where the front cover 72 is located in the first body 81. When the base 813 is provided in a ring shape, the base 813 has an inner circumferential surface (inner edge) close to the drum inlet 722 and an outer circumferential surface (outer edge) close to the circumferential surface of the drum body 71.

[0102] The first surface 811 is provided as a wall protruding from the outer edge of the base 813 toward the front surface of the tub 2 (the surface on which the tub insertion port is formed), and the second surface 812 is provided as a wall protruding from the inner edge of the base 813 toward the front surface of the tub 2. Therefore, the second surface 812 forms a ring-shaped wall surrounding the drum insertion port 722, and the first surface 811 forms a ring-shaped wall surrounding the second surface.

[0103] An open surface (front open surface) is formed between the free end of the first surface 811 and the free end of the second surface 812, and the open surface is closed by the second body portion 82. Therefore, inside the front balancer 8, a circulation path 84 (front circulation path) is formed by the base portion 813, the first surface 811, the second surface 812, and the second body portion 82. The circulation path 84 is a ring-shaped path surrounding the drum inlet 722.

[0104] The front balancer 8 is provided with balls 841 that can move along the circulation path 84, and a plurality of balls 841 may be provided as needed. A liquid that prevents the balls from moving too fast may be stored in the circulation path 84, and in this case, the second body 82 is provided with an inlet 821 (front inlet) that introduces the liquid into the circulation path 84.

[0105] The front balancer 8 is fixed to the drum 7 via a fastening portion 85 (front fastening portion). As shown in Fig. 3, the fastening portion 85 includes a fixing body 851 (front fixing body) provided on the base 813, and a fastening body 852 (front fastening body) that fixes the fixing body 851 to at least one of the drum body 71 and the front cover 72.

[0106] 3 shows an example in which the fastener 852 fastens the fixed body 851 to the drum body 71 and the front cover 72. In this case, the fastener 852 not only serves to fasten the front balancer 8 to the drum 7, but also serves to connect the drum body 71 and the front cover 72.

[0107] When the fixing body 851 is positioned on the second surface 812, the front balancer 8 needs to be fixed to the drum inlet 722 or the front cover 72. However, since the diameter of the through hole 83 is longer than the diameter of the drum inlet 722, it is not easy to fix the front balancer 8 to the drum inlet 722.

[0108] In addition, in order to fix the front balancer 8 to the front cover 72, the fastener 852 is provided perpendicular to the front cover 72, but this results in the centrifugal force generated when the drum rotates inducing shear stress in the fastener, which may reduce the durability of the drum and the first body part and may cause damage to the clothes inside the drum.

[0109] The risk of a decrease in durability of the front balancer 8 increases as the diameter of the through-hole 83 increases, and damage to the front balancer causes problems such as liquid leakage inside the circulation path (such problems represent a more important design challenge in laundry treatment devices with long drum diameters, such as commercial washing machines).

[0110] On the other hand, when the fixing body 851 is provided on the first surface 811 and the fastening body 852 is provided to connect the fixing body 851 with the circumferential surface of the drum body 71, the front balancer 8 can be easily fixed to the drum 7 without the above-mentioned problems.

[0111] However, when the fixed body 851 is positioned on the first surface 811, the diameter of the circulation path 84 becomes shorter (the first surface needs to be moved in the direction of the drum inlet to secure the space required to install the fixed body), but the shorter diameter of the circulation path means that the centrifugal force acting on the ball 841 when the drum rotates becomes smaller, and the reduction in the centrifugal force acting on the ball 841 has the disadvantage that it takes a long time to correct the imbalance of the drum.

[0112] When the fixing body 851 is provided on the base 813, the centrifugal force acting on the ball 841 is maximized, thereby realizing the effect of quickly eliminating the imbalance of the drum.

[0113] 2, the front cover 72 includes a front cover body 721 having the drum inlet 722, a front mounting portion 723 that is provided in a ring shape on the front cover body 721 surrounding the drum inlet 722 and to which the base 813 is attached, and a front connecting portion 725 that extends from the front mounting portion 723 and contacts the circumferential surface of the drum body 71. The front mounting portion 723 is provided as a groove formed by bending the front cover body 721 toward the rear cover 73.

[0114] When the drum 7 rotates, the first surface 811 is deformed by centrifugal force. If the front cover 72 has the above-described structure, the front connection part 725 serves to suppress the deformation of the first surface 811.

[0115] When the fixing body 851 is provided to protrude from the base 813 toward the front mounting part 723, the front mounting part 723 further includes a front mounting groove 724 in which the fixing body 851 is received.

[0116] The front mounting groove 724 is formed as a groove formed by bending the front mounting portion 723 toward the rear cover 73. A plurality of the fixing bodies 851 are provided. The fixing bodies 851 are provided at positions spaced apart from each other by the same angle based on the center of the through hole 83, and the number of the front mounting grooves 724 is the same as the number of the fixing bodies 851.

[0117] The fastener 852 is inserted into the first fixing hole 713 to fix the fixing body 851 to the drum body 71, and the first fixing hole 713 is configured to penetrate the circumferential surface of the drum body 71 and the front connecting portion 725 and connect to the front mounting groove 724.

[0118] When the fixing body 851 is provided to be inserted into the front mounting groove 724, the fastening force between the front balancer 8 and the drum 7 can be increased.

[0119] The height of the upper end of the fixed body 851 may be the same as the height of the first surface 811 as shown in FIG. 3, or may be provided at a point lower than the height of the first surface 811 (H), or may be provided at a point higher than the height of the first surface 811 as shown in FIG. 4.

[0120] The structure of the fixed body 851 in FIG. 4 not only maximizes the centrifugal force acting on the ball 841, but also has the effect of minimizing deformation of the bodies 81 and 82 by allowing the fixed body 851 to be supported by the front connecting part 725.

[0121] In order to minimize deformation of the first surface 811 due to centrifugal force generated when the drum 7 rotates, the front balancer 8 may further be provided with a first reinforcing portion 86 (front first reinforcing portion).

[0122] 5, the first body 81 includes a first connecting surface 813a (front first connecting surface) located at a corner where the first surface 811 and the base 813 are connected, and a second connecting surface 813b (front second connecting surface) located at a corner where the second surface 812 and the base 813 are connected. The first connecting surface 813a is a curved surface that curves from the base 813 toward the first body 811, and the second connecting surface 813b is a curved surface that curves from the base 813 toward the second body 812.

[0123] The first reinforcing portion 86 includes a first extending portion 861 (first front extending portion) that protrudes from the first surface 811 toward the front cover 72 (toward the front mounting portion), and a first supporting portion 862 (first front supporting portion) that has one end fixed to the first extending portion 861 and the other end fixed to the first connecting surface 813a. The first supporting portion 862 is a means for minimizing deformation of the first extending portion 861 and maintaining the distance between the first extending portion 861 and the first connecting surface 813a.

[0124] It is preferable that the distance (L3) from the second body 82 to the free end of the first extension 861 is set equal to the distance from the second body 82 to the outer circumferential surface of the base 813 (the free end of the first extension is provided to be positioned on the same plane as the base). This is to minimize the space required in the front cover 72 for mounting the front balancer 8.

[0125] The first support portion 862 is formed of a plurality of ribs (first support plates) spaced at equal intervals from each other based on the center of the through hole 83 (the center of the drum inlet). Although not shown, the first reinforcing portion 86 may be formed of only one of the first extension portion 861 and the first support portion 862.

[0126] 6, when the first extension portion 861 is provided, the fixing body 851 is provided to connect the first extension portion 861 and the base portion 813. When the fixing body 851 is provided as described above, the possibility that the first extension portion 861 and the first surface 811 will be deformed can be further reduced.

[0127] In order to minimize deformation of the first surface 811 and the base 813 due to centrifugal force and to increase the durability of the fixed body 851, the front balancer 8 may further be provided with a fixed body support part 853 (front fixed body support part).

[0128] The fixed body support portion 853 is a means for connecting the first extension portion 861, the fixed body 851, and the base portion 813, and is provided to include a support body that connects the first extension portion 861 and the base portion 813, an upper end connector that connects the upper end of the support body to the fixed body 851, and a lower end connector that connects the lower end of the support body to the fixed body 851.

[0129] The fixed body support part 853 preferably includes a fixed body first support part provided on the left side of the fixed body 851 and a fixed body second support part provided on the right side of the fixed body 851 .

[0130] In order to minimize deformation of the second surface 812 due to centrifugal force generated when the drum 7 rotates, the front balancer 8 may further include a second reinforcing portion 87 (front second reinforcing portion).

[0131] 5, the second reinforcing portion 87 is provided as a protrusion 871 (forward protrusion) protruding from the second surface 812 toward the drum inlet 722. When the protrusion 871 is provided on the second surface 812 forming the through hole 83, deformation of the second surface 812 due to centrifugal force can be minimized.

[0132] The second reinforcing portion 87 further includes a second extending portion 872 (front second extending portion) extending from the protruding portion 871 toward the front cover 72 (extending toward the front mounting portion). The second extending portion 872 forms a ring-shaped wall (the through-hole) surrounding the drum insertion opening 722.

[0133] When the second extension portion 872 is provided, the second reinforcement portion 87 may further include a second support portion 873 (front second support portion) having one end fixed to the second extension portion 872 and the other end fixed to the second connecting surface 813b.

[0134] The second support portion 873 includes a plurality of ribs (second support plates) spaced apart at equal intervals from each other with respect to the center of the through hole 83 (with respect to the center of the drum inlet).

[0135] 6, the second support portion 873 is provided with a plurality of ribs spaced apart at the same angle (A) with respect to the center (center of the base) of the through hole 83, and experiments have confirmed that when the angle (A) is set to 7 degrees to 15 degrees, deformation of the front balancer 8 can be effectively prevented. Furthermore, it is preferable that the thickness (T4) of the second support portion 873 is set to be 1 / 2 or more times the thickness (T1) of the second surface 812.

[0136] As shown in Figure 5, when the distance (L2) from the protrusion 871 to the free end of the second extension portion 872 is set to be at least half the distance (L1) from the protrusion 871 to the outer peripheral surface of the base portion 813, deformation of the second surface 812 can be effectively prevented.

[0137] 7 is a graph showing the change in strength of the second support portion 873 depending on the ratio of the length (L2) of the second extension portion 872 to the length (L1) of the second surface 812. The graph in FIG. 7 indicates that when the length ratio (L2 / L1) between L2 and L1 is less than 0.5, the strength of the second support portion 873 changes significantly depending on the length ratio, but when the length ratio is 0.5 or more, the change in strength of the second support portion 873 is not significant. Therefore, the length ratio between L2 and L1 that achieves the maximum effect at the minimum cost is considered to be between 0.5 and 1.

[0138] 5, when the length (L2) of the second extending portion 872 is set shorter than the length (L1) of the second surface 812, it is preferable that the free end of the second supporting portion 873 be provided with an inclined portion 874 (front inclined portion). This is because the wider the second supporting portion 873, the more advantageous it is in preventing deformation of the second surface 812. The inclined portion 873 is provided as an inclined surface connecting the free end of the second extending portion 872 to the second connecting surface 813b.

[0139] It was confirmed that when the thickness (T3) of the second extension portion 872 is set to be equal to or less than the thickness (T1) of the second surface 812, it is effective in preventing deformation of the second surface 812, and that it is most effective when the thickness (T3) of the second extension portion 872 is set to be 0.7 to 0.9 times the thickness (T1) of the second surface.

[0140] On the other hand, when the height (T2) of the second support portion 873 connecting the second surface 812 and the second extension portion 872 is set to be 0.3 times or more the distance (L2) from the protrusion portion 871 to the free end of the second extension portion 872, it is effective in preventing deformation of the second surface 812.

[0141] FIG. 8 shows an example of the rear balancer 9, and the rear balancer 9 has the same structure as the front balancer 8 described above.

[0142] That is, the rear balancer 9 is fixed to the drum body 71 or the rear cover 73 and includes ring-shaped rear bodies 91, 92 surrounding the drive shaft 791. The rear body includes a first rear body part 91 fixed to the drum 71, a second rear body part 92 fixed to the first rear body part, and a rear through-hole 93 that penetrates the first rear body part and the second rear body part and through which the drive shaft 791 passes.

[0143] As shown in FIG. 9, the rear first body portion 91 includes a ring-shaped rear base portion 913 surrounding the drive shaft 761, a ring-shaped rear first surface 911 provided along the outer edge of the rear base portion 913, and a ring-shaped rear second surface 912 provided along the inner edge of the rear base portion 813.

[0144] The rear base 913 is provided in a ring-shaped plane facing the position where the rear cover 73 is located in the rear first body part 91. When the rear base 913 is provided in a ring shape, the rear base 913 has an inner circumferential surface (inner edge) close to the drive shaft 761 and an outer circumferential surface (outer edge) close to the circumferential surface of the drum body 71.

[0145] The first rear surface 911 is provided as a wall protruding from the outer edge of the rear base 913 toward the rear surface of the tab 2, and the second rear surface 912 is provided as a wall protruding from the inner edge of the rear base 913 toward the rear surface of the tab 2. Therefore, the second rear surface 912 forms a ring-shaped wall surrounding the drive shaft 761, and the first rear surface 911 forms a ring-shaped wall surrounding the second rear surface.

[0146] An open surface is formed between the free end of the rear first surface 911 and the free end of the rear second surface 912, and the open surface is closed by the rear second body portion 92. Therefore, in the rear balancer 9, a rear circulation path 94 is formed by the rear base portion 913, the rear first surface 911, the rear second surface 912, and the rear second body portion 92. The rear circulation path 94 is a ring-shaped path surrounding the drive shaft 761.

[0147] The rear balancer 9 is provided with a ball 941 (rear ball) that can move along the rear circulation path 94, and liquid is stored in the rear circulation path 94 to prevent the ball from moving too fast.

[0148] The rear balancer 9 is fixed to the drum 7 via a rear fastening part 95. The rear fastening part 95 includes a rear fixing body 951 provided on the rear base 913, and a rear fastening body 952 that fixes the rear fixing body 951 to at least one of the drum body 71 and the rear cover 73. FIG. 9 shows an example in which the rear fastening body 952 fixes the rear fixing body 951 to the drum body 71 and the rear cover 73.

[0149] When the rear fixed body 951 is provided on the rear base 913, the centrifugal force acting on the ball 941 can be maximized, thereby realizing the effect of quickly eliminating the unbalanced state of the drum.

[0150] The height of the upper end of the rear fixed body 951 may be equal to the height of the rear first surface 911, or may be located at a point lower than the height of the first surface 811 (H), or may be located at a point higher than the height of the rear first surface 911, and Figure 9 shows the latter case as an example.

[0151] As shown in Figure 8, the rear cover 73 includes a rear cover body 731 to which the drive shaft 761 is fixed, a rear mounting portion 733 that is provided in the shape of a ring on the rear cover body 731 surrounding the drive shaft 761 and to which the rear base 913 is attached, and a rear connecting portion 735 that extends from the rear mounting portion 733 and contacts the circumferential surface of the drum body 71.

[0152] When the drum 7 rotates, the first rear surface 911 is deformed by centrifugal force. If the rear cover 73 has the above-described structure, the rear connecting portion 735 serves to suppress the deformation of the first rear surface 911.

[0153] When the rear fixing body 951 is provided to protrude from the rear base 913 toward the rear mounting part 733, the rear mounting part 733 may further include a rear mounting groove 734 for receiving the rear fixing body 951. The rear mounting groove 734 is provided as a groove formed by bending the rear mounting part 733 toward the front cover 72.

[0154] A plurality of rear fixing bodies 951 may be provided. The rear fixing bodies 951 are provided at positions spaced apart from each other by the same angle based on the center of the rear through-hole 93, and the number of rear mounting grooves 734 is the same as the number of rear fixing bodies 951.

[0155] The rear fastening body 952 is inserted into the second fixing hole 715 to fix the rear fixing body 951 to the drum body 71, and the second fixing hole 715 is configured to penetrate the circumferential surface of the drum body 71 and the rear connecting portion 735 and connect to the rear mounting groove 734.

[0156] When the rear fixing body 951 is provided to be inserted into the rear mounting groove 734, the fastening force between the rear balancer 9 and the drum 7 can be increased.

[0157] The laundry treatment device having the above-described structure not only can quickly correct the drum imbalance, but also has the advantage of minimizing the space required in the rear cover 73 for installing the rear balancer 9.

[0158] In order to minimize deformation of the first rear surface 911 and the second rear surface 912 due to centrifugal force generated when the drum 7 rotates, the rear balancer 9 may further include at least one of a first rear reinforcing portion 96 and a second rear reinforcing portion 97.

[0159] The structures of the rear first reinforcing portion 96 and the rear second reinforcing portion 97 are similar to the structures of the first reinforcing portion 86 and the second reinforcing portion 87 of the front balancer described above.

[0160] 5, the first rear body 91 includes a first rear connection surface 913a located at a corner where the first rear surface 911 and the rear base 913 are connected, and a second rear connection surface 913b located at a corner where the second rear surface 912 and the rear base 913 are connected. The first rear connection surface 913a is formed as a curved surface that curves from the rear base 913 toward the first rear body 911, and the second rear connection surface 913b is formed as a curved surface that curves from the rear base 913 toward the second rear body 912.

[0161] In this case, the first rear reinforcing part 96 includes a first rear extending part 961 protruding from the first rear surface 911 toward the rear cover 73, and a first rear supporting part 962 having one end fixed to the first rear extending part 961 and the other end fixed to the first rear connecting surface 913a. The first rear supporting part 962 is formed of a plurality of ribs (first rear supporting plates) spaced at equal intervals from each other based on the drive shaft 761.

[0162] As shown in FIG. 6, when the rear first extension portion 961 is provided, the rear fixed body 951 is provided to connect the rear first extension portion 961 and the rear base portion 913, and rear fixed body support portions 953 are provided on both sides of the rear fixed body 951.

[0163] The rear fixed body support part 953 is a means for connecting the rear first extension part 961, the rear fixed body 951, and the rear base part 913, and is provided to include a support body connecting the rear first extension part 961 and the rear base part 913, an upper end connector connecting the upper end of the support body to the rear fixed body 951, and a lower end connector connecting the lower end of the support body to the rear fixed body 951.

[0164] The rear fixed body support part 953 preferably includes a rear fixed body first support part provided on the left side of the rear fixed body 951 and a rear fixed body second support part provided on the right side of the rear fixed body 951.

[0165] As shown in FIG. 5, the rear second reinforcement portion 97 includes a rear protruding portion 971 protruding from the rear second surface 912 toward the rotation center (drive shaft) of the drum, a rear second extending portion 972 extending from the rear protruding portion 971 toward the rear cover 73, and a rear second support portion 973 having one end fixed to the rear second extending portion 972 and the other end fixed to the rear second connecting surface 913b.

[0166] The rear second support portion 973 is formed of a plurality of ribs (rear second support plates) spaced at equal intervals from each other based on the center of the rear through-hole 93, and a rear inclined portion 974 is formed at the free end of the rear second support portion 973.

[0167] The rear second reinforcing portion 97 may be provided by only the rear protruding portion 971, or may be provided by only the rear protruding portion 971 and the rear second supporting portion 973, or may be provided by only the rear protruding portion 971 and the rear second extending portion 972. The same applies to the second reinforcing portion 87 provided on the front balancer.

[0168] The thickness, length and arrangement characteristics of the aforementioned rear first reinforcing portion 96 and rear second reinforcing portion 97 are similar to those of the aforementioned first reinforcing portion 86 and second reinforcing portion 87 of the front balancer 8, so detailed explanation will be omitted.

[0169] 9, the thickness of the front cover 72 and the thickness of the rear cover 73 may be set to be different. Considering that an external force is input to the rear cover 73 from the drive shaft 761, it is preferable that the thickness of the rear cover 73 be set to be thicker than the thickness of the front cover 72.

[0170] In this case, the drum body 71 may further include a receiving groove 714 for moving the first fixing hole 713 toward the drum input port 722. If the front balancer 8 and the rear balancer 9 are designed to have the same structure and the front cover 72 and the rear cover 73 have different thicknesses, the position of the first fixing hole 713 must be moved to a point where it contacts the fixing body 851 of the front balancer 8 in order to minimize deterioration in durability of the front balancer 8.

[0171] The circulation paths 84, 94 of the front balancer 8 and the rear balancer 9 according to the above-described embodiments may be provided with only balls 841, 941, both balls and liquid, or only liquid.

[0172] The above-described clothing treatment device can be modified and embodied in various forms, and the scope of the present invention is not limited to the above-described embodiments.

[0173] [Claims (at the time of international application)] [Claim 1] A clothing treatment device, cabinets with input openings; a tub provided inside the cabinet, providing a space for storing water, and having a tub inlet connected to the inlet; a drum rotatably provided inside the tub to provide a space for accommodating garments to be fed into the tub opening; a balancer including: a base provided in a ring shape surrounding the center of rotation of the drum and fixed to the drum; a first ring-shaped surface provided along the outer edge of the base; a second ring-shaped surface provided along the inner edge of the base and forming a circulation path together with the base and the first surface; and a ball movable along the circulation path; and A clothing processing device characterized by comprising: a fastening portion provided on the base for fixing the balancer to the drum. [Claim 2] The drum is a cylindrical drum body located inside the tub; a front cover located on the drum body in a direction toward the tab insertion opening; a rear cover provided at a position opposite to the front cover; a communication hole provided through the drum body; and a drum inlet that penetrates the front cover and allows clothes to flow into the drum body; The clothing processing device according to claim 1, wherein the balancer is fixed to the front cover. [Claim 3] The fastening portion is a fixture provided on the base; and The clothing processing device according to claim 2, further comprising: a fastening member for fastening the fixing member to at least one of the drum body and the front cover. [Claim 4] 4. The clothing processing device according to claim 3, wherein the height of the uppermost end of the fixed body is located at a point lower than the height of the uppermost end of the first surface. [Claim 5] The front cover is a front cover body provided with the drum inlet; a front mounting portion provided on the front cover body in a ring shape surrounding the drum inlet, to which the base is attached; and a front coupling portion extending from the front mounting portion and contacting the drum body; The clothing processing device according to claim 3, wherein the fixing body and the front connecting portion are fixed to the drum body by the fastening body. [Claim 6] The fixing body is provided so as to protrude from the base portion toward the front mounting portion, The clothing processing device according to claim 5, wherein the front mounting portion has a front mounting groove that accommodates the fixed body. [Claim 7] a first extension portion extending from the first surface toward the front mounting portion; The clothing processing device according to claim 5, wherein the fixed body connects the first extension portion and the base portion. [Claim 8] a first connecting surface located at a corner where the first surface and the base are connected and curved from the base toward the first body; and The clothing processing device described in claim 7 further comprises a first support portion, one end of which is fixed to the first extension portion and the other end of which is fixed to the first connecting surface, maintaining the distance between the first extension portion and the first connecting surface. [Claim 9] The clothing processing device according to claim 5, further comprising: a protrusion protruding from the second surface toward the drum inlet. [Claim 10] a second connecting surface located at a corner where the second surface and the base are connected, and curved from the base toward the second body; a second extension portion configured in a ring shape that extends from the protruding portion toward the front mounting portion and surrounds the drum inlet; and The clothing processing device described in claim 9 further comprises a second support portion, one end of which is fixed to the second extension portion and the other end of which is fixed to the second connecting surface, maintaining the distance between the second extension portion and the second connecting surface. [Claim 11] The clothing processing device according to claim 10, characterized in that the distance from the protrusion to the free end of the extension is set to at least half the distance from the protrusion to the outer peripheral surface of the base. [Claim 12] The clothing processing device according to claim 11, wherein the support portion further comprises an inclined portion connecting the free end of the extension portion to the connecting surface. [Claim 13] 11. The clothing processing device according to claim 10, wherein the thickness of the second extension portion is set to be equal to or less than the thickness of the second surface. [Claim 14] The drum is a cylindrical drum body located inside the tub; a front cover located on the drum body in a direction toward the tab insertion opening; a rear cover provided at a position opposite to the front cover; a communication hole provided through the drum body; and a drum inlet that penetrates the front cover and allows clothes to flow into the drum body; The clothing processing device according to claim 1, wherein the balancer is fixed to the rear cover. [Claim 15] The fastening portion is a posterior fixator provided on the base; and The clothing processing device according to claim 14, further comprising: a rear fastening member that fastens the rear fixing member to at least one of the drum body and the rear cover. [Claim 16] 16. The clothing processing device according to claim 15, wherein the height of the uppermost end of the rear fixing body is located at a point lower than the height of the uppermost end of the first surface. [Claim 17] a drive unit that rotates the drum using a drive shaft fixed to the rear cover; The rear cover is a rear cover body to which the drive shaft is fixed; a rear mounting portion provided in the rear cover body in a ring shape surrounding the drive shaft and providing a space in which the base portion is mounted; and a rear connection portion extending from the rear mounting portion and contacting the drum body; The clothing processing device according to claim 15, wherein the rear fixing body and the rear connecting portion are fixed to the drum body by the rear fastening body.

Claims

1. A clothing treatment device, cabinet with input opening; a tub provided inside the cabinet, providing a space for storing water, the tub having a tub inlet connected to the inlet; a drum rotatably provided inside the tub to provide a space for accommodating garments to be fed into the tub opening; The drum is a cylindrical drum body positioned inside the tub; a front cover provided in the drum body and positioned in a direction toward the tub insertion opening; a rear cover provided at a position opposite to the front cover; A communication hole provided to penetrate the drum body, and a drum inlet that penetrates the front cover and allows the clothes to flow into the drum body; Balancer; and The balancer is a base provided in a ring shape surrounding the rotation center of the drum and fixed to the drum; a ring-shaped first surface provided along the outer edge of the base; a second surface provided in a ring shape along the inner edge of the base, the second surface forming a circulation path together with the base and the first surface; a ball movable along the circulation path; and a fastening portion provided on the base for fixing the balancer to the drum; a second reinforcing portion formed on the second surface toward the tab insertion opening and reinforcing the strength of the second surface; The second reinforcing portion is a protrusion protruding from the second surface toward the tab insertion opening; a second extension portion that is ring-shaped and extends from the protrusion toward the front cover; A clothing processing device characterized by comprising a second support portion provided between the second extension portion and the second surface.

2. A clothing processing device as described in Claim 1, characterized in that the balancer is fixed to the front cover.

3. The fastening portion is a fixed body provided on the base, and The clothing treating device according to claim 2, further comprising a fastening member for fastening the fixing member to at least one of the drum body and the front cover.

4. The clothing processing device according to claim 3, wherein the height of the uppermost end of the fixed body is located at a point lower than the height of the uppermost end of the first surface.

5. The front cover is a front cover body provided with the drum insertion port; a front mounting portion provided on the front cover body in a ring shape surrounding the drum insertion port, to which the base portion is attached; and a front connecting portion extending from the front mounting portion and contacting the drum body, The clothing treating device according to claim 3, wherein the fixing body and the front connecting portion are fixed to the drum body by the fastening body.

6. The fixing body is provided so as to protrude from the base portion toward the front mounting portion, The clothing processing device according to claim 5, wherein the front mounting portion has a front mounting groove that accommodates the fixing body.

7. a first extension portion extending from the first surface toward the front mounting portion; The clothing processing device according to claim 5 , wherein the fixed body connects the first extension portion and the base portion.

8. a first connecting surface located at a corner where the first surface and the base are connected and curved from the base toward the first surface; and The clothing processing device of claim 7 further comprises a first support portion, one end of which is fixed to the first extension portion and the other end of which is fixed to the first connecting surface, for maintaining a distance between the first extension portion and the first connecting surface.

9. a second connecting surface located at a corner where the second surface and the base are connected, the second connecting surface being curved from the base toward the second surface; The second extension portion extends from the protruding portion toward the front mounting portion and is configured in a ring shape surrounding the drum inlet; and The clothing processing device of claim 5, characterized in that one end of the second support portion is fixed to the second extension portion and the other end is fixed to the second connection surface, maintaining a gap between the second extension portion and the second connection surface.

10. The clothing processing device according to claim 9, characterized in that the distance from the protrusion to the free end of the second extension is set to be at least half the distance from the protrusion to the outer peripheral surface of the base.

11. The clothing processing device according to claim 10, wherein the second support portion further comprises an inclined portion connecting the free end of the second extension portion to the second connecting surface.

12. The clothing processing device according to claim 9, wherein the thickness of the second extension portion is set to be equal to or less than the thickness of the second surface.

13. A clothing processing device as described in claim 1, characterized in that the balancer is fixed to the rear cover.

14. The fastening portion is a rear fixation body provided on the base, and The clothing treating device according to claim 13, further comprising a rear fastening member for fastening the rear fixing member to at least one of the drum body and the rear cover.

15. The clothing processing device according to claim 14, wherein the height of the uppermost end of the rear fixing body is located at a point lower than the height of the uppermost end of the first surface.

16. a drive unit that rotates the drum using a drive shaft fixed to the rear cover; The rear cover is a rear cover body to which the drive shaft is fixed; a rear mounting portion provided in a ring shape on the rear cover body to surround the drive shaft and provide a space in which the base portion is mounted; and a rear connection portion extending from the rear mounting portion and contacting the drum body, The clothing treating device according to claim 14, wherein the rear fixing body and the rear connecting portion are fixed to the drum body by the rear fastening body.

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