Laundry treating apparatus

Abstract

To provide a laundry treating apparatus in which a volume independently occupied by a driver that rotates a drum for accommodating laundry therein, and a volume of a space defined between a rear surface of the drum and a cabinet rear panel can be compactly arranged.SOLUTION: A laundry treating apparatus comprises: a drum configured to accommodate laundry therein; a hot air supplier disposed outside the drum and configured to supply hot air into the drum; and a driver including a rotation shaft configured to rotate the drum, wherein the drum includes: a drum body having a laundry inlet defined in a front surface and providing a space configured to accommodate the laundry, and a drum rear surface coupled to the rear end of the drum body, and wherein the drum rear surface includes: a rear surface body coupled to an outer circumferential surface of the drum body and defining a rear surface of the drum, and a seating portion recessed at the center of the rear surface body, and wherein a diameter of the seating portion is larger than that of the driver so that at least a portion of the driver is accommodated in the seating portion.SELECTED DRAWING: Figure 15

Description

[Technical field]

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

[0002] A clothing treatment device is a device that applies a physical force to clothing to remove dust or foreign matter from the clothing, and includes washing machines, dryers, refreshers (stylers), and the like.

[0003] A washing machine performs a washing process by supplying water and detergent to clothes and separating and removing foreign substances from the clothes.

[0004] Dryers are classified into exhaust type dryers and circulation type dryers, and both perform a drying process in which high-temperature hot air is produced by a heater and exposed to the clothes to remove moisture from the clothes.

[0005] Recently, dryers have been designed to perform a centralized drying process by eliminating the structure for supplying and draining water to and from clothes, and by eliminating the tub for storing water in the cabinet, which simplifies the structure inside the dryer and improves drying efficiency by directly supplying hot air to the drum that stores the clothes.

[0006] Such a dryer includes a drum for accommodating clothes, a hot air supplying unit for supplying hot air to the drum, and a driving unit for rotating the drum. As a result, the dryer can supply hot air into the drum to dry the clothes accommodated in the drum, and rotate the drum to uniformly expose the surfaces of the clothes to the hot air. As a result, the entire surfaces of the clothes can be uniformly exposed to the hot air to complete the drying.

[0007] Meanwhile, in order for the driving unit to rotate the drum, it needs to be fixed inside the cabinet. Also, when rotating the rotating shaft connected to the drum, the driving unit needs to be connected parallel to the rotating shaft. However, since there is no tub fixed inside the cabinet in a dryer, there is a limitation in that the driving unit cannot be fixed to the tub like in a washing machine.

[0008] To solve this problem, dryers have been developed that have the drive unit fixed to the back of the cabinet.

[0009] FIG. 1 shows a conventional dryer structure in which the drive unit is attached to the rear of the cabinet.

[0010] This dryer includes a cabinet 1 which forms the exterior, a drum 2 which is rotatably provided within the cabinet 1 and which contains clothes, and a drive unit 3 which rotates the drum 2.

[0011] The drive unit 3 is disposed on the rear surface of the drum 2 to rotate the drum 2, or is coupled and fixed to a rear panel 11 forming the rear surface of the cabinet 1. In this way, the drive unit 3 is fixed to the cabinet 1 and can rotate the drum 2.

[0012] The driving unit 3 of the above-mentioned conventional dryers commonly includes a stator 31 fixed to the rear panel 11, a rotor 32 rotated by the stator 31, and a rotating shaft 33 coupled with the rotor 32 to rotate the drum 2, and also includes a reducer 37 which reduces the rpm of the rotating shaft 33 while increasing the torque to rotate the drum 2.

[0013] Furthermore, all conventional dryers commonly further include a fixing portion 4 that fixes the driving portion 3 to the rear panel 11. The fixing portion 4 includes either a first fixing portion 41 that fixes the stator 31 to the rear panel 11 or a second fixing portion 42 that fixes the rotating shaft 33 to the rear panel 11. As a result, the conventional dryers are able to stably rotate the drum 2 by arranging the rotating shaft 33 connected to the drum 2 and the driving portion 3 in parallel.

[0014] However, because the rear panel 11 of the cabinet is made of a thin steel plate, it easily deforms or vibrates even with a very small external force. In addition, the rear panel 11 receives the load of not only the drive unit 3 but also the drum 2 via the rotating shaft 33, making it difficult to maintain its shape.

[0015] Furthermore, if the clothes are eccentric within the drum 2 or fall repeatedly into the drum 2 as it rotates, an external force is repeatedly transmitted to the rear panel 11, causing the rear panel 11 to vibrate.

[0016] If vibration or external force is transmitted to the rear panel 11 and the rear panel 11 is bent or deformed even temporarily, a problem may occur in which the rotating shaft 33 connecting the driving unit 3 and the drum 2 is twisted. This causes unnecessary vibration and noise in the driving unit 3, and in the worst case, the rotating shaft 33 may be damaged. There is also a problem of unnecessary noise being generated in the process of the rear panel 11 being bent or deformed.

[0017] In addition, when the rear panel 11 vibrates, the gap between the rotor 32 and the stator 31 changes temporarily, which may cause the rotor 32 to collide with the stator 31, resulting in the generation of unnecessary vibrations and noise.

[0018] Furthermore, when the driving unit 3 further includes a reducer 37, the rotating shaft 33 coupled to the reducer 37 and the reduction shaft 33a connected from the reducer 37 to the drum 2 are separate from each other. In this case, since the reducer 37 is supported by the rear panel 11 via the stator 31 and the rotating shaft 33, even a slight deformation of the rear panel 11 can cause problems such as twisting or misalignment of the reduction shaft 33a and the rotating shaft 33.

[0019] In other words, the reduction shaft 33a connected to the drum 2 changes position less due to the weight of the drum 2 than the rotation shaft 33 connected to the drive unit 3. Therefore, if the rear panel 11 is temporarily bent or deformed, the rotation shaft 33 and the reduction shaft 33a will tilt to different degrees, causing the rotation shaft 33 and the reduction shaft 33a to become misaligned.

[0020] Therefore, in the conventional laundry processing device, the rotating shaft 33 and the reduction shaft 33a are misaligned every time the driving unit 3 is operated, which not only makes it impossible to guarantee the reliability of the reduction gear 37, but also puts the reduction gear 37 at risk of being damaged.

[0021] Meanwhile, in order to directly connect the driving unit 3 to the drum 200 in the dryer, it is necessary to connect a rotating shaft that transmits the power of the driving unit 3 to the drum 200. However, as described above, in the conventional dryer, a specific structure for connecting the driving unit 3 to the drum 200 is not specified, and it is considered to apply a structure for connecting the drum 200 and the driving unit 3 of a washing machine.

[0022] FIG. 2 is a diagram showing a conventional structure for connecting a rotating shaft to a drum.

[0023] 2(a), the conventional clothing treatment device includes a drum back surface 220 for connecting to a drive unit at the back surface of the drum 20, and a spider 230 connected to the drum back surface 220. The spider 230 is not only fixed to the drum back surface 220, but also extends to the circumferential surface of the drum to fix the drum 200 and form a rotation shaft 234 for rotating the drum 200.

[0024] Thus, the drum 200 has a rotation shaft 234 protruding from the spider 230 to the outside, and the driving unit is coupled with the rotation shaft 234 to rotate the rotation shaft, thereby rotating the drum 200.

[0025] 2(b), spider 230 is typically mounted and fixed on a connection surface 227 formed on drum rear surface 220 or fixed by a fixing bolt (n) or the like. Spider 230 includes a hub 231 connected to the center of the rear surface of drum 220, blades 232 extending radially from hub 231, fastening holes 233 protruding from blades 232 and fastened to fixing bolts (n), and a rotating shaft 234 protruding from hub 231 to the outside.

[0026] In this case, the driving part includes a motor 63 that rotates the rotating shaft, and a bearing 61 that extends from the motor 63 and accommodates and supports the rotating shaft. The rotating shaft 234 is accommodated and supported in the bearing 61, which further includes a connecting shaft 62 that is coupled to the rotating shaft 234 and transmits the power of the motor 63 to the rotating shaft 234. The connecting shaft 62 corresponds to another driving shaft that is rotated by the motor 63. The spider 230 needs a gear shaft 2341 that is coupled to the rotating shaft 234 separately from the bearing 61 or the coupling part 62 of the driving part to extend further.

[0027] As a result, the conventional clothing treatment device has a limitation in that it requires not only the spider 230 but also another structure to accommodate and support the rotating shaft 234 in order to rotate the drum 200. Therefore, the above structure causes a problem in that the length of the drum and the driving unit becomes unnecessarily long.

[0028] Specifically, in addition to the thickness (D) of the motor 63 and the thickness (T) of the coupling part 62, which are essential components for generating the power to rotate the drum 200 by the spider 230 from which the rotating shaft 234 protrudes, it is necessary to ensure the length (A1) of the rotating shaft 234 itself and the support length (A2) of the bearing 61 that supports the rotating shaft.

[0029] In other words, there is a problem that an additional length (A) including the length (A1) of the rotating shaft 234 itself which is unnecessarily extended and the supporting length (A2) for receiving and supporting the same must be unnecessarily secured.

[0030] In this case, since the length of the front and rear of the cabinet is limited, the length of the drum 200 is shortened by the additional length (A), which reduces the volume of clothes that can be stored. Of course, if the spider 230 is recessed into the rear surface 220 of the drum, the thickness of the drive unit can be made thinner by that amount, but the laundry volume in the drum still remains reduced.

[0031] In addition, when the laundry processing device is a dryer, the drive section of the dryer needs to be equipped with a reducer that reduces the rotation speed of the motor 63 and increases the torque.

[0032] Generally, a reducer accommodates two shafts and changes the RPM of each shaft. Therefore, when the reducer is arranged to rotate a drum connected to the spider 230, the reducer must accommodate and support the rotating shaft 234 protruding from the drum 200 and the connecting shaft 62 connected to the motor unit 63, so there is a limit in that a large number of bearings must be secured to support these shafts.

[0033] Ultimately, the overall length of the reducer is further increased, which increases the overall thickness of the drive unit, resulting in a problem that a sufficient drum volume cannot be secured within the cabinet.

[0034] As a result, if a dryer is manufactured in which a rotary shaft protruding from the drum 200 is directly rotated, there is a fundamental limitation that the volume of the drum 200 cannot be sufficiently secured, or the cabinet is manufactured to be unnecessarily long.

[0035] Therefore, due to such fundamental limitations, dryers having a drive unit that directly rotates a drum exist only as patent documents, and no actual products have been manufactured. Summary of the Invention [Problem to be solved by the invention]

[0036] The present invention aims to provide a clothes treatment device in which a free end of a rotating shaft that rotates the drum is inserted into and connected to the drum, rather than having a rotating shaft extending from the drum.

[0037] An object of the present invention is to provide a clothes treating device in which a rotating shaft extends from a drive unit that generates power and is directly inserted or housed in a drum and coupled thereto.

[0038] The present invention aims to provide a clothing processing device that can ensure a sufficient drum length even when equipped with a motor that generates power and a reduction gear that converts and transmits the motor's output.

[0039] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a clothes treatment device having a drum that rotates by directly connecting to the free end of a rotating shaft.

[0040] An object of the present invention is to provide a clothes treating device having a drum with a bushing portion attached to the rear surface of the drum, the bushing portion receiving the free end of the rotating shaft.

[0041] The present invention aims to provide a clothes treatment device capable of reducing the total thickness of a motor that generates power and a reduction gear.

[0042] The present invention aims to provide a clothing treatment device that can maintain the rotation shaft of a motor that provides the rotational power to rotate a drum and a reducer that converts the rpm and torque of the rotational power.

[0043] An object of the present invention is to provide a clothes treatment device in which the reducer and the motor can tilt or vibrate simultaneously. [Means for solving the problem]

[0044] The present invention provides a structure in which a drive unit (reduction gear) is partially housed on the rear surface of the drum. A space is formed on the rear surface of the drum to partially house the reduction gear and the like.

[0045] The drum and the reducer or the driving part are connected by a male-female connection structure, that is, a rotating shaft extends from the driving part, and the drum is connected by receiving the free end of the rotating shaft.

[0046] The drum is provided with another bushing portion that receives the free end of the rotating shaft, and the space in which the bushing portion is disposed receives a part of the reducer and at least a part of the bearing that supports the rotating shaft.

[0047] The bushing portion includes a pipe that extends into the drum and accommodates the rotating shaft, and a disk-shaped coupling portion that couples to the rear surface of the drum.

[0048] The pipe is formed with an insertion portion into which an output shaft extending from the reducer is inserted.

[0049] The rear surface of the drum includes a seat portion that is recessed into the drum's inlet and an installation surface that protrudes from the seat portion toward the rear surface of the drum. The seat portion houses the drive unit and part of the rotating shaft, and the installation surface houses part of the bushing.

[0050] The clothes treatment device according to the present invention has a rotational coupling structure between the female drum and the male drive unit.

[0051] Specifically, the back surface of the drum is provided with a structure (bushing portion) for accommodating the rotating shaft.

[0052] A bushing part to be connected to the drive part (reduction gear) shaft is disposed in the center of the rear surface of the drum, and the bushing has an accommodation groove in which the drive part (reduction gear) shaft is accommodated and coupled.

[0053] The receiving groove of the bushing portion has serrations (gear grooves) on the inner peripheral surface. The rotating shaft may be provided with serrations (screw gears) that match the gear grooves.

[0054] The receiving groove of the bushing portion is recessed into the drum.

[0055] The bushing portion is recessed inward from the rear surface of the drum and is connected to the rear surface of the drum. The bushing portion is made of a material with greater rigidity than the rear surface of the drum.

[0056] The bushing portion has a coupling surface that extends obliquely from the receiving groove toward the driving portion and is coupled to the back surface of the drum, and the bushing portion is formed in a conical shape.

[0057] On the other hand, the bushing portion has serrations only in the receiving groove, and the bushing portion and the drum are joined by bolts or the like.

[0058] The clothing treatment device according to the present invention includes a rear case that supports a reducer that converts the power output from a drive unit.

[0059] The drum is disposed on one surface (inner side) of the rear case, and the drive unit or the reducer is disposed on the other surface (outer side) of the rear cabinet.

[0060] In order to reduce the volume of the drive unit or the reducer protruding from the rear of the cabinet, the rear case is provided with a mounting groove recessed into the inside of the drum.

[0061] A plurality of brackets to which the reducers are connected are coupled and fixed to the mounting grooves.

[0062] The rear surface of the drum is disposed separate and spaced from the rear case.

[0063] The rear surface of the drum is provided with a seat portion that is recessed to face the rear case and the mounting groove.

[0064] The seat portion is formed to have a shape that corresponds to the mounting groove and a portion of the mounting groove is received in the seat portion.

[0065] The seat portion may at least partially accommodate the reducer or the drive portion.

[0066] The drive unit includes a motor unit consisting of a stator and an outer rotor.

[0067] The reducer is at least partially contained within the stator, and the reducer is directly coupled to the stator.

[0068] The seat portion has a support surface that extends and is bent inward or outward so that the bushing is supported on the back surface of the drum.

[0069] The center of the sheet surface is bent outward or inward again from the support surface to provide an installation surface to which the bushing portion is joined.

[0070] The bushing portion is connected to the installation surface by a bolt or the like.

[0071] The bushing portion includes a coupling surface that bears against the protruding surface, a recessed surface that extends from the coupling surface into the drum, and a shaft coupling portion that extends from the recessed surface back to the exterior of the drum for coupling with the shaft.

[0072] The bushing portion is coupled to a rotating shaft protruding from the reducer. Effect of the Invention

[0073] According to the present invention, the rotating shaft does not extend from the drum, but the free end of the rotating shaft that rotates the drum is inserted into and coupled to the drum.

[0074] According to the present invention, a rotating shaft extends from a driving unit that generates power and can be directly inserted or housed in and coupled to the drum.

[0075] According to the present invention, even when a motor that generates power and a reduction gear that converts and transmits the output of the motor are provided, a sufficient length of the drum can be ensured.

[0076] According to the invention, a drum may be provided which rotates directly connected to the free end of the rotating shaft.

[0077] According to the present invention, a drum can be provided having a bushing portion attached to the rear surface of the drum for receiving the free end of the rotating shaft. [Brief description of the drawings]

[0078] [Figure 1] FIG. 1 is a diagram showing a conventional clothing processing device. [Diagram 2] FIG. 1 is a diagram showing a coupling structure in which a drum is male and a drive part is female in a conventional clothing processing device. [Diagram 3] 1 is a diagram showing the appearance of a clothing processing device according to the present invention; [Figure 4] 1 is a diagram showing an internal configuration of a clothing processing device according to the present invention; [Diagram 5] FIG. 2 is a diagram showing a drum of the laundry treatment device according to the present invention. [Figure 6]1 is a diagram showing an internal structure of a clothing processing device according to the present invention. [Figure 7] 4 is a diagram showing a structure for supporting the drum of the laundry treatment device according to the present invention; FIG. [Figure 8] 4 is a diagram showing a rear case structure of the clothing processing device according to the present invention. FIG. [Figure 9] 13A and 13B are diagrams showing a structure in which a drive unit is coupled to a rear case. [Figure 10] 4 is a diagram showing a reduction gear of the clothing processing device according to the present invention. FIG. [Figure 11] 4 is a diagram showing a coupling structure between a reducer and a stator of the clothing processing device according to the present invention. FIG. [Figure 12] FIG. 2 is a diagram showing the final connection structure of the drive unit of the clothing processing device according to the present invention. [Figure 13] 1 is a diagram showing the structure in which the drum and the shaft of the drive unit of the clothing treatment device according to the present invention are connected. [Figure 14] 4 is a diagram showing the structure of a bushing part of the clothing processing device according to the present invention. FIG. [Figure 15] 1 is a diagram showing a structure in which the drive unit of the clothing processing device according to the present invention is compactly arranged. [Figure 16] 11A and 11B are diagrams showing another embodiment of the bushing portion and the rear surface of the drum of the clothing treatment device according to the present invention. [Figure 17] 1 is a diagram showing a structure in which components arranged behind the drum of a clothing treatment device according to the present invention are arranged compactly. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0079] Hereinafter, the embodiments described in this specification will be described in detail with reference to the attached drawings. In this specification, the same or similar components are given the same or similar reference symbols even in different embodiments, and the description thereof will be omitted. The singular expressions used in this specification include the plural expressions unless the context clearly indicates otherwise. In addition, in describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. The attached drawings are intended to facilitate an understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification should not be limited by the attached drawings.

[0080] FIG. 3 is a diagram showing the appearance of the clothing processing device 10 according to the present invention.

[0081] The clothing treatment device according to one embodiment of the present invention includes a cabinet 100 that forms the exterior.

[0082] The cabinet 100 includes a front panel 110 that forms the front surface of the clothing treatment device, and the front panel 110 is provided with an input port 111 that communicates with a drum 200 described later, and a door 130 that is rotatably connected to the cabinet to open and close the input port 111.

[0083] The front panel 110 is provided with a control panel 117. The control panel 117 is provided with an input unit 118 through which a user inputs control commands, and a display unit 119 that outputs information such as user-selectable control commands. The control commands include drying courses or drying options for carrying out a series of drying steps. The control panel 177 is provided with a main control unit that controls commands for carrying out the drying courses or drying options.

[0084] The input unit 118 includes a power supply request unit that requests power supply to the clothing processing device, a course input unit that allows the user to select a desired course from among a number of courses, and an execution request unit that requests the start of the course selected by the user.

[0085] The display unit 119 includes either a display panel capable of outputting text and graphics, or a speaker capable of outputting audio signals and sounds.

[0086] Meanwhile, the clothing treatment device according to the present invention includes a water storage unit 7 for separately storing moisture generated in the process of drying clothing. The water storage unit 7 includes a water storage tank that can be pulled out from one side of the front panel 110. The water storage tank collects condensed water transferred from a washing pump, which will be described later. Thus, a user can pull out the water storage tank from the cabinet 1 to remove the condensed water, and then reattach it to the cabinet 100. Therefore, the clothing treatment device according to the present invention can be used even in places where there is no sewer pipe.

[0087] On the other hand, the water storage section 7 is disposed above the door 130. This requires the user to bend slightly when pulling the water tank out from the front panel 110.

[0088] Meanwhile, the clothing treatment device according to the present invention further includes a steam unit 195 that supplies steam to the clothing (or inside the cabinet). The steam unit 195 generates steam from condensed water discharged from the clothing, or generates steam by receiving fresh water that is not condensed water. The steam unit 195 generates steam by heating water, using ultrasonic waves, or vaporizing water.

[0089] The steam unit 195 generates steam by receiving a certain amount of water, and therefore occupies a certain volume. At this time, the front panel 110 of the cabinet is provided with a door and a control panel 117, and the rear panel 120 of the cabinet is provided with a duct for supplying and discharging air to and from the drum, a water supply unit, and the like. Therefore, it is advantageous to arrange the steam unit 195 inside the side panel 140 of the cabinet.

[0090] In addition, the clothing treatment device according to the present invention includes a steam control unit 800 for separately controlling the steam unit 195. The steam control unit 800 is provided in the control panel 117, but may be provided as a separate control panel in order to prevent overloading of the control panel 117 and to prevent an increase in manufacturing costs.

[0091] The steam control unit 800 is provided adjacent to the steam unit 195. The steam control unit 800 is provided on the side panel 140 where the steam unit 195 is provided, so that the length of the control lines connected to the steam unit 195 can be reduced.

[0092] Because the steam unit 195 provides the steam that contacts the clothes, it is desirable to generate steam with fresh water. The water collected in the water reservoir 7 is generated from the clothes and may contain lint or other foreign matter, making it unsuitable for generating steam.

[0093] Therefore, the clothing treatment device according to the present invention includes a water supply unit 160 that supplies water to the steam unit 195 and is provided separately from the water storage unit 7. The water supply unit 160 stores fresh water or receives fresh water from an external source and supplies it to the steam unit 195.

[0094] For example, the water supply unit 160 includes an external supply unit 180 that receives water from an external water source and delivers it to the steam unit 195 , and an internal supply unit 170 that stores fresh water separately and supplies it to the steam unit 195 .

[0095] The internal supply unit 170 includes a water tank 171 that stores fresh water and is provided separately from the water storage unit 7. The water tank 171 and the steam unit 195 are installed at different heights so that water in the water tank 171 is supplied to the steam unit 195 by its own weight.

[0096] If it is not possible to ensure the difference in installation height between water tank 171 and steam section 195, it is desirable to further provide water pump 172. When water pump 430 is provided, the space within cabinet 1 can be utilized more compactly.

[0097] Thus, the water supply section 160 further includes a water pump 172 which supplies water from a water tank 171 to the steam section 195, and a tank housing 173 which mounts the water tank 171 and the water pump 172 within the cabinet.

[0098] The external supply 180 is connected to an external water source and includes a direct water valve through which water is supplied.

[0099] In addition, the clothing treatment device according to the present invention further includes a decision unit 196 for deciding which of the external supply unit 180 and the internal supply unit 170 should be used preferentially to supply water to the steam unit 195 .

[0100] The decision unit 196 decides whether the external supply unit 500 or the internal supply unit 400 should be used with priority.

[0101] The water tank 171 stores fresh water. It is preferable that the water tank 171 is exposed to the outside of the cabinet 100 so that the water tank 171 can be filled with fresh water as needed.

[0102] Meanwhile, the water tank 171 may be provided in a removable manner in the cabinet 100. This allows the user to remove the water tank 171 from the cabinet 100 and easily fill it with water.

[0103] The water tank 171 is pulled out through the front panel 110. However, if the water tank is also pulled out through the front panel 110, it is difficult to secure an area for pulling out the water tank 171 due to the area of ​​the control panel 117 that is occupied by the front panel 110.

[0104] Therefore, the water tank 171 can be pulled out through the top panel 130 to prevent interference with the control panel 117.

[0105] On the other hand, since the water tank 171 also stores water, and the water storage unit 7 also stores water, the user may be confused. Therefore, in the clothing treatment device according to the present invention, the water tank 171 and the water storage unit 7 may be exposed from the cabinet in different directions or positions.

[0106] That is, the water tank 171 is exposed to the upper panel 130, and the water storage unit 7 is exposed to the front panel 11. This makes it possible to prevent a user from confusing the water tank 171 with the water storage unit 7 even if both are provided. In addition, the water tank 171 has a smaller volume than the water storage unit 7 because it must store fresh water and maintain the freshness of the stored water. Therefore, a user can distinguish between the water tank 171 and the water storage unit 7 based on the difference in volume.

[0107] The water tank 171 has a smaller volume than the water storage unit 7, and can therefore be easily pulled out from the top. Therefore, the water tank 171 can be provided so as to be pulled out upward from the upper panel 130. As a result, the pull-out directions of the water tank 171 and the water storage unit 7 are different from each other, further reducing the possibility of confusion by the user.

[0108] The upper panel 130 of the clothing treatment device according to the present invention is provided with a tank pull-out hole or pull-out hole 131 for exposing the water tank 171 to the outside or for pulling the tank 171 out of the cabinet. The tank pull-out hole 131 has a cross-sectional area corresponding to the cross-sectional area of ​​the water tank 171 or slightly larger than that of the water tank 171.

[0109] The top panel 130 further includes a drawer cover 132 that covers the tank pull-out hole 131 to prevent the water tank 171 from being pulled out arbitrarily.

[0110] The laundry treatment device according to the present invention further includes a filter for removing foreign matter from the circulation flow path. The front panel 110 is provided with a filter mounting hole 113 through which the filter can be inserted or removed.

[0111] FIG. 4 is a diagram showing the inside of the clothing processing device according to the present invention.

[0112] The clothing treatment device according to the present invention includes a drum 200 that is accommodated in a cabinet 100 and accommodates clothing therein, a driving unit (M) that rotates the drum 200, and a hot air supplying unit 900 that supplies hot air to the drum 200.

[0113] Drum 200 is cylindrical and contains clothes. In addition, since there is no need to put water into drum 200 and no need to discharge water condensed in drum 200 to the outside, through holes provided along the periphery of drum 200 can be omitted.

[0114] The driving unit (M) is directly connected to the drum 200 to rotate the drum 200. For example, the driving unit (M) is a DD (Direct Drive unit) type. As a result, the driving unit (M) can control the rotation direction or the rotation speed of the drum 200 by directly rotating the drum 200 without using a configuration such as a belt and pulley.

[0115] In general, in the case of a DD type washing machine, the driving unit (M) is connected and fixed to a tub that houses the drum 200, and the drum 200 is connected to the driving unit (M) and supported by the tub. However, in the clothes treating device according to the present invention, the tub that is fixed to the cabinet 100 to house the drum 200 is omitted because the device is focused on the drying process.

[0116] Accordingly, the clothing treatment device according to the present invention further includes a support part 400 for fixing or supporting the drum 200 or the driving part (M) within the cabinet 100.

[0117] The support unit 400 includes a front case 410 provided in front of the drum 200, and a rear case 420 provided behind the drum 200. The front case 410 and the rear case 420 are plate-shaped and are provided such that the front and rear of the drum 200 face each other. The distance between the front case 410 and the rear case 420 is set to be the same as the length of the drum 200 or longer than the length of the drum 200. The front case 410 and the rear case 420 are fixed and supported by the bottom surface of the cabinet 100 or a hot air supply unit 900 described later.

[0118] Since the input port of the drum 200 is located at the front, it is preferable that the driving unit (M) is located in the rear case 420 rather than in the front case. The rear case 420 is formed so that the driving unit (M) is attached and supported in an area facing the rear surface of the drum 200. As a result, the driving unit (M) can rotate the drum 200 while being stably fixed in position via the rear case 420.

[0119] Either the front case 410 or the rear case 420 rotatably supports the drum 200. Either the front case 410 or the rear case 420 houses the front end or the rear end of the drum 200 rotatably.

[0120] For example, the front of the drum 200 is accommodated in the front case 410 and supported for free rotation, and the rear of the drum 200 is separated from the rear case 420 and is connected to a driving unit (M) attached to the rear case 420, so that the rear is indirectly supported by the rear case 420. This minimizes the area where the drum 200 comes into contact with or rubs against the support unit 400, and can prevent the generation of unnecessary noise and vibration.

[0121] Of course, the drum 200 may be rotatably supported by both the front case 410 and the rear case 420 .

[0122] The hot air supply unit 900 forms a circulation flow path that discharges the air inside the drum 200 to the outside and feeds it into the drum 200, and dries the clothes stored in the drum 200 by heating the circulating air or condensing the moisture in the circulating air.

[0123] The hot air supplying unit 900 is preferably disposed at the bottom of the drum 200 so that the inlet of the drum 200 is disposed at a relatively high position and the user can easily remove the clothes from the drum 200 .

[0124] The hot air supplying unit 900 includes a plurality of heat exchangers for cooling or heating the air flowing therethrough, and also includes a cleaning unit 940 for removing foreign matter adhering to the heat exchangers using condensed water in the air.

[0125] The hot air supplying unit 900 supplies air into the drum 200 through the front case 410 and discharges the air toward the rear case 420 .

[0126] A duct cover 430 is attached to the rear case 420 to guide hot air supplied from the hot air supply unit 900 to the rear surface of the drum 200. The duct cover 430 exposes the driving unit (M) to the outside to cool the driving unit (M). The cabinet 100 further includes a blocking plate 120 to prevent the duct cover 430 and the driving unit (M) from being exposed to the outside to prevent a safety accident.

[0127] The front-to-rear length (T1) of the cabinet is the length from the front case 410 to the rear panel 120. Strictly speaking, the length of the cabinet is from the front panel 120 to the rear panel 120, but since the length from the front case 410 to the rear panel 120 corresponds to the allowable space in which the internal configuration of the clothing processing device according to the present invention is provided, the length of the allowable space (T1 = allowable length) is simply referred to as the length of the cabinet.

[0128] Once the allowable length (T1) is determined, the length (T2) of the drum 200 and the length (T3) of the drive section are determined. The allowable length (T1) includes the drum length (T2) and the drive section length (T3), and is equal to or less than the sum of the drum length (T2) and the drive section length (T3).

[0129] On the other hand, if the rear panel 120 is omitted, the rear case 420 may form the rear surface of the cabinet.

[0130] FIG. 5 is a diagram showing the drum of the laundry treatment device according to the present invention.

[0131] The drum 200 of the clothing treatment device according to the present invention is not indirectly rotated by being connected to a belt or the like, but is directly connected to the driving unit (M) and rotated. Therefore, unlike the drum of a conventional dryer, which is cylindrical with open front and rear ends, the drum 200 of the clothing treatment device according to the present invention is directly connected to the driving unit (M) with the rear closed.

[0132] Specifically, the drum 200 includes a cylindrical drum body 210 for accommodating clothes, and a drum rear surface 220 coupled to the rear of the drum body 210 to form the rear surface of the drum.

[0133] The drum rear surface 220 covers the rear of the drum body 210 and provides a space directly connected to the driving unit (M). That is, the drum rear surface 220 is connected to the driving unit (M) and receives power directly to rotate the drum body 210. As a result, an input port 211 through which clothes are input is formed in the front of the drum body 210, and the rear is covered by the drum rear surface 220.

[0134] A bushing unit 300, which is connected to the driving unit (M), is connected to the drum rear surface 220. The bushing unit 300 is provided on the drum rear surface 220 and forms the rotation center of the drum 200. The bushing unit 300 may be formed integrally with the drum rear surface 220, but is made of a material that is stronger in rigidity and durability than the drum rear surface 220 so as to be firmly connected to the rotation shaft extending from the driving unit (M). The bushing unit 300 is connected to the center of the drum rear surface 220.

[0135] The drum rear surface 220 includes a circumferential portion 221 coupled to the outer circumferential surface of the drum body 210, and a seat portion 223 provided inside the circumferential portion 221 and coupled to the driving portion (M). The seat portion 223 may include a through hole to which the bushing portion 300 is coupled and through which the bushing portion 300 is inserted.

[0136] Between the circumferential portion 221 and the seat portion 223, there is provided a suction hole 224 for guiding the hot air supplied from the hot air supplying portion 900 so that it is introduced into the drum body 210. The suction hole 224 is made up of a plurality of holes provided penetrating the drum rear surface 220, or is made up of a mesh-like net.

[0137] In order to prevent the stiffness of the drum back surface 220 from decreasing due to the suction holes 224, a reinforcing rib 225 for reinforcing the stiffness of the drum back surface 220 is further provided. The reinforcing ribs 225 extend radially from the outer circumferential surface of the seat portion 223 toward the inner circumferential surface of the circumferential portion 221. A circumferential rib 226 is further provided extending in the circumferential direction of the drum back surface 220 so as to connect the reinforcing ribs 225 to each other. Suction holes 224 are disposed between the reinforcing ribs 225 and the circumferential rib 226, and between the seat portion 223 and the circumferential portion 221, so that the reinforcing rib 225 and the circumferential rib 226 enable the drum back surface 220 to maintain its shape even when a rotational force is transmitted from the driving unit (M) to the drum back surface 220.

[0138] Meanwhile, one or more reinforcing beads 212 are provided on the outer circumferential surface of the drum body 210 to reinforce the rigidity of the drum body 210. The reinforcing beads 212 are recessed or protruded inward or outward along the circumference of the drum body 210, and a plurality of reinforcing beads 212 may be disposed at intervals along the length of the drum body 210.

[0139] This prevents the drum body 210 from twisting even when a large amount of clothes is stored in the drum body 210 or when a rotational force is suddenly transmitted through the driving unit (M).

[0140] As a result, the drum 200 of the clothing treatment device according to the present invention is not rotated by a belt or the like, but is rotated by the rear surface 220 of the drum being directly connected to the drive unit (M).

[0141] Therefore, even if the driving unit (M) changes the rotation direction or the rotation speed is fast, the drum 200 of the clothes treating device according to the present invention can immediately reflect it and rotate.

[0142] FIG. 6 is a diagram showing the internal configuration of a clothing processing device according to the present invention.

[0143] As described above, the drum 200 is cylindrical and includes the drum body 210 that is open at the front and rear, and the drum rear surface 220 that is connected to the rear of the drum body 210 and closes the rear of the drum body 210.

[0144] A rotating shaft extending from the driving part (M) is directly coupled to the bushing part 300 .

[0145] The front case 410 includes a front plate 411 forming a main body, and an input communication hole 412 penetrating the front plate 411 and accommodating the front or input port 211 of the drum body 210. A gasket 413 for accommodating the drum body 210 is provided on the outer circumferential surface of the input communication hole 412.

[0146] The gasket 413 rotatably supports the input port 211 of the drum body 210 and is capable of contacting the outer circumferential surface of the input port 211. The gasket 413 prevents hot air inside the drum 200 from leaking between the drum body 210 and the front plate 411. The gasket 413 is made of a plastic resin or an elastic body, and another sealing member is further bonded to the inner circumferential surface of the gasket 413 to prevent clothes or hot air from escaping to the front plate 411 through the input port 211 of the drum body 210.

[0147] Meanwhile, a duct communication hole 419 is formed on the inner peripheral surface of the gasket 413 or the input communication hole 412, which communicates with the drum body 210 and through which the air input into the drum body 210 is discharged. A flow path connecting the duct communication hole 419 and the hot air supply unit 900 is provided inside the front plate 411. Thus, the duct communication hole 419 guides the air discharged from the drum body 210 to be supplied to the hot air supply unit 900.

[0148] A filter member is provided in the duct communication hole 419 to prevent foreign matter and lint discharged from the drum 200 from entering the hot air supplying part 900 .

[0149] The front case 410 includes a front wheel 415 that is installed in contact with the outer circumferential surface of the drum body 210 and rotatably supports the drum 200. The front wheels 415 support the outer circumferential surface of the input port of the drum body 210, and a plurality of the front wheels 415 are installed spaced apart along the outer circumferential surface of the input communication hole 412. The front wheels 415 support the lower part of the drum body 210 and rotate together with the drum 200 when the drum 200 rotates.

[0150] Further, a stopper 500 for preventing the drum body 210 from coming off is coupled to the front case 410. The stopper 500 may be disposed on a stopper mounting portion 416 disposed on the front case 410 above the input communication hole 412.

[0151] The front case 410 is provided with a tank support hole 414 through which the water tank of the water tank 7 is pulled out or supported. The tank support hole 414 is provided in an area of ​​the front panel 110 corresponding to the portion where the water tank 7 is disposed, and is formed penetrating the front case 410.

[0152] A cutout 417 supported by the hot air supply unit 900 is provided at the bottom of the front case 410. The cutout 417 prevents the front case 410 from interfering with the hot air supply unit 900. The cutout 417 communicates with a supply duct of the hot air supply unit 900 to transfer the air in the drum supplied to the duct communication hole 419 to the hot air supply unit 900.

[0153] The hot air supplying section 900 includes a circulation flow path 920 through which air discharged from the drum 200 circulates. The circulation flow path 920 is in the form of a duct arranged outside the drum 200. The circulation flow path 920 includes a supply duct 921 that communicates with the duct communication hole 419 and to which air from the drum 200 is supplied, a moving duct 922 through which the air supplied from the supply duct 921 moves, and a discharge duct 923 through which the air that has passed through the moving duct 922 is discharged.

[0154] The supply duct 921 communicates with a cutout 417 in the front case 410 and communicates with a flow path provided within the front case 410. The moving duct 922 extends from the end of the supply duct 921 toward the rear of the drum 200, and the exhaust duct 923 is provided at the end of the moving duct 922 to guide air to the drum 200.

[0155] Meanwhile, a heat pump 950 for cooling or heating air is provided inside the hot air supply unit 900. The heat pump 950 includes an evaporator 951 that is provided inside the moving duct 922 and cools the air to condense moisture contained in the air, and a condenser 952 that is located downstream of the evaporator 951 or toward the exhaust duct 923 and reheats the air. The heat pump 950 further includes an expansion valve that cools the refrigerant that has passed through the condenser 952 and guides it back to the evaporator 951, and a compressor 953 that pressurizes and heats the refrigerant that has passed through the evaporator 951 and supplies it to the condenser 952. The compressor 953 is provided outside the moving duct 922.

[0156] The evaporator 951 and the condenser 952 are heat exchangers through which the refrigerant flows.

[0157] The hot air supplying unit 900 further includes a connector 930 that communicates with the exhaust duct 923 and guides the hot air to the rear of the drum 200 or to the duct cover 430. The connector 930 is provided on the upper part of the exhaust duct 923 and guides the hot air that has passed through the condenser 952 and been heated to a position rearward of the exhaust duct 923.

[0158] Meanwhile, the hot air supply unit 900 further includes a blower fan 9531 for moving the air in the drum 200 to the supply duct 921 or for blowing the air that has passed through the exhaust duct 923 into the drum 200. The blower fan 9531 is provided in the exhaust duct 923 and is controlled by the main control unit together with the driving unit (M).

[0159] The rear case 420 includes a rear plate 421 facing the front plate 411. The rear case 420 includes an attachment portion 429 to which the driving unit (M) is coupled and placed. The attachment portion 429 penetrates the rear case 420, and the driving unit (M) is attached to the attachment portion 429 and fixed inside the cabinet 100. The attachment portion 429 supports the load of the driving unit (M), and the driving unit (M) is provided at a position corresponding to the drum rear surface 220.

[0160] The rear plate 421 is further formed with an air movement hole 423 that communicates with the connector 930 and through which air flows in, and a communication hole 424 that discharges the air that has passed through the air movement hole 423 to the drum rear surface 220.

[0161] A duct cover 430 is attached to the rear surface of the rear plate 421 to form a flow path for moving the air flowing in through the connector 930 to the intake hole 224 provided in the drum rear surface 220 .

[0162] The duct cover 430 is connected to the rear plate 421 but is spaced apart from the intake holes 224 to form a space between the rear plate 421 and the duct cover 430 through which air moves.

[0163] Duct cover 430 covers all communication holes 424 so that none of the communication holes 424 is exposed to the outside. As a result, air that has flowed into duct cover 430 is entirely discharged through communication holes 424, preventing leakage to the outside. Duct cover 430 houses driving part (M) at a distance from the outer circumferential surface of driving part (M) to prevent interference with driving part (M), and exposes driving part (M) to the outside to induce cooling of driving part (M).

[0164] Meanwhile, since the duct cover 430 is heated by hot air and the driving unit (M) also has a rotating rotor, a rear panel 120 is disposed behind the duct cover 430 to shield them. The rear panel 120 is coupled to the rear case 420 to prevent the duct cover 430 and the driving unit (M) from being exposed to the outside. The rear panel 120 is disposed apart from the duct cover 430 and the driving unit (M).

[0165] The driving unit (M) includes a motor unit 600 that provides power to rotate the drum 200. The motor unit 600 includes a stator 610 that generates a rotating magnetic field, and a rotor 620 that is rotated by the stator 610.

[0166] The rotor 620 is an outer rotor type that houses the stator 610 and rotates around the stator 610. In this case, a rotating shaft may be coupled to the rotor 620 and directly connected to the drum 200 by passing through the stator 610 and the mounting portion 429. In this case, the rotor 620 directly transmits power to rotate the drum 200.

[0167] Meanwhile, the rotor 620 is rotated by the stator 610 at a high RPM, for example, at a higher RPM than the RPM at which the clothes within the drum 200 can rotate while still adhering to the inner wall of the drum 200.

[0168] However, if the clothes inside the drum 200 continue to stick to the inner wall of the drum 200 while rotating, the clothes that are stuck to the inner wall of the drum are not exposed to the hot air, which reduces the drying efficiency.

[0169] If the rotor 620 rotates at a low RPM so that the clothes inside the drum 200 roll or agitate instead of sticking to the inner walls of the drum 200, a problem occurs in which the power or torque generated by the driving unit (M) cannot be properly utilized.

[0170] Therefore, the driving unit (M) of the clothing treatment device according to the present invention further includes a reducer 700 that reduces the RPM to utilize the maximum output of the motor unit 600 while increasing the torque.

[0171] The reducer 700 connects the motor unit 600 and the drum 200. The reducer 700 converts the power of the motor unit 600 to rotate the drum 200. The reducer 700 is disposed between the motor unit 600 and the drum 200 and receives power from the motor unit 600, converts the power, and transmits it to the drum 200. The reducer 700 converts the RPM of the rotor to a lower RPM, but increases the torque value before transmitting it to the drum 200.

[0172] Specifically, the reducer 700 is coupled to a drive shaft 630 that extends from the rotor unit 610 and rotates together with the rotor unit 610. A gear box that meshes with the drive shaft 630 to rotate and change the rpm of the drive shaft 630 to increase the torque is provided inside the reducer 700, and the gear box is connected to a rotating shaft 740 that is coupled to the drum 200 and rotates the drum. Therefore, when the drive shaft 630 rotates, the rotating shaft 740 rotates at a lower RPM than the drive shaft 630, but can rotate with a larger torque.

[0173] The performance of the reducer 700 varies depending on whether the driving shaft 630 and the rotating shaft 740 are coaxial. That is, if the driving shaft 630 and the rotating shaft 740 are misaligned, the connection between the components constituting the gear box in the reducer 700 and either the driving shaft 630 or the rotating shaft 740 may loosen or be released. As a result, the power of the driving shaft 630 may not be properly transmitted to the rotating shaft 740, or the driving shaft 630 may spin freely.

[0174] Furthermore, even if the drive shaft 630 and the rotating shaft 740 are temporarily misaligned, the gear boxes in the reducer 700 will become misaligned and collide with each other, generating unnecessary vibrations and noise.

[0175] Furthermore, if the angle at which the drive shaft 630 and the rotating shaft 740 are temporarily misaligned becomes too large, the gear box in the reducer 700 may completely come out of its normal position or may be damaged.

[0176] As a result, if the drive shaft 630 and the rotating shaft 740 cannot be maintained coaxially with each other or are not arranged parallel to each other even temporarily, the performance of the reducer 700 cannot be guaranteed and the drum 200 cannot be rotated as intended.

[0177] Therefore, in general, a clothing processing device equipped with a reduction gear has the reduction gear and the motor fixed to a support that maintains its original state without deformation even when an external force is applied.

[0178] For example, in the case of a washing machine, the tub that houses the drum is first fixed to the cabinet, and then the motor and reducer are secondarily fixed to the rigid bearing housing that is built inside the tub using injection molding.In addition, a fixed steel plate that is connected to the tub is placed on the outside of the tub, and the motor and reducer are fixed to the fixed steel plate.

[0179] Therefore, even if a considerable vibration occurs in the tub, the reducer and the driving unit will tilt or vibrate together with the bearing housing and the fixed steel plate. As a result, the reducer and the driving unit themselves can always maintain a connected state, and the driving shaft and the rotating shaft can be maintained in a coaxial state.

[0180] However, since the laundry treatment device according to the present invention is a dryer, the structure of a tub fixed inside the cabinet is omitted. Also, since the rear panel 120 of the cabinet is made of a relatively thin plate, even if the stator 610 is fixed, the rear panel 120 easily vibrates or bends due to the repulsive force when the rotor 620 or the drive shaft 630 rotates. If the rear panel 120 vibrates or bends temporarily, the rotation shaft 740 and the drive shaft 630 arranged to be connected to the drum 200 bend, causing a problem of misalignment between the rotation shaft 740 and the drive shaft 630.

[0181] In addition, since the rear panel 120 is made of a thin steel plate, it cannot support both the reducer 700 and the motor unit 600. For example, if the reducer 700 and the motor unit 600 are coupled to the rear panel 120 in parallel, a rotational moment is generated due to the overall length and weight of the reducer 700 and the motor unit 600, causing the reducer 700 to sag downward. As a result, the rotating shaft 740 coupled to the drum is misaligned with the reducer 700 and is unable to maintain its coaxiality with the driving shaft 630.

[0182] In addition, the rear panel 120 cannot support the motor unit 600 itself. A problem occurs in that the surface of the rear panel 120 on which the motor unit 600 is provided is bent downward due to the weight of the motor unit 600. The rear panel 120 is not originally configured to be suitable for mounting the motor unit 600 itself.

[0183] Meanwhile, it is considered that the stator 620 is coupled to the rear case 420 to support the motor unit 600. If a large amount of clothes is stored in the drum 200 or eccentricity occurs, the rotating shaft 740 may shift in accordance with the arrangement of the clothes every time the drum 200 rotates. In this case, since the stator 610 is separated from the drum 200 and fixed to the rear case 420, the rotating shaft 740 vibrates at a different amplitude or tilts at a different angle from the stator 610. Therefore, the rotating shaft 740 and the drive shaft 630 cannot maintain the same axis.

[0184] In addition, the drum 200 is supported by the front case 410 and the rear case 420, or the installation position is fixed at a constant level by the stopper 500 described below. Therefore, the position of the rotating shaft 740 connected to the drum 200 is also fixed at a constant level. Therefore, even if the drum 200 vibrates, the vibration is buffered by either the front case 410 or the rear case 420 or the stopper 500.

[0185] However, when vibrations generated in drum 200 are transmitted to motor unit 600, the vibration amplitude of motor unit 600 and rear case 420 is larger than the vibration amplitude of rotating shaft 740 even if reducer 700 and motor unit 600 are fixed to rear case 420. In this case, there is also a possibility that drive shaft 630 and rotating shaft 740 may not be able to maintain the same axis.

[0186] To solve this problem, the clothing processing device according to the present invention couples and fixes the motor unit 600 to the reducer 700. In other words, the reducer 700 itself serves as a reference point for the entire driving unit (M). That is, the reducer 700 serves as a reference for the vibration and tilt angle amount of the entire driving unit (M).

[0187] Since the motor unit 600 is not fixed to other components of the clothing processing device, but is fixed only to the reducer 700, when vibration or external force is transmitted to the drive unit (M) and the reducer 700 tilts or vibrates, the motor unit 600 always tilts or vibrates at the same time as the reducer 700.

[0188] As a result, the reducer 700 and the driving section 600 form one vibration system, and the reducer 700 and the driving section 600 do not move relative to each other, but can maintain a fixed state.

[0189] In the driving part 600, the stator 610 is directly coupled and fixed to the reducer 700. As a result, the position of the driving shaft 630 relative to the reducer 700 does not change. The centers of the driving shaft 630 and the reducer 700 are aligned with each other, and the driving shaft 630 rotates while maintaining the same axis as the center of the reducer 700.

[0190] The above-mentioned meaning of "coaxial" and "aligned" does not mean perfectly physically coaxial and aligned, but is a concept that allows for a range of tolerance recognized in mechanical engineering or a level of coaxiality or alignment that a person skilled in the art would recognize. For example, the range in which the drive shaft 630 and the rotation shaft 740 are misaligned within 5° can be defined as the coaxial or aligned state.

[0191] The drive shaft 630 rotates based on the reducer 700, but is fixed to prevent tilting, and the stator 610 is also fixed to the reducer 700, so that the gap between the stator 610 and the rotor 620 is always maintained. As a result, collision between the stator 610 and the rotor 620 is prevented, and noise and vibrations generated by the change in the center of rotation as the rotor 620 rotates the stator 610 can be essentially blocked.

[0192] The rotating shaft 740 extends toward the drum 200 within the reducer 700, vibrates together with the reducer 700, and tilts together with the reducer 700. That is, the rotating shaft 740 is only provided to rotate in the reducer 700, and the position at which it is provided is fixed. As a result, the rotating shaft 740 and the driving shaft 630 are always arranged in parallel to each other and form a coaxial structure. In other words, the center of the rotating shaft 740 and the center of the driving shaft 630 are maintained in a state of being aligned with each other.

[0193] The reducer 700 and the motor unit 600 are arranged along a first axis (S1) parallel to the ground when there is no load on the drum 200 or when the motor unit 600 is not operating. The drive shaft 630 and the rotation shaft 740 are also arranged in parallel along the first axis (S1).

[0194] However, when vibration occurs in the drum 200 or the motor unit 600, the vibration is transmitted to the reducer 700, causing the reducer 700 to vibrate or tilt, resulting in the reducer 700 temporarily tilting toward the second axis (S2).

[0195] At this time, since the motor unit 600 is coupled to the reducer 700, it vibrates or tilts together with the reducer 700 and is disposed parallel to the second axis (S2). Therefore, the driving shaft 630 and the rotating shaft 740 are also disposed parallel to the second axis (S2).

[0196] As a result, even if the reducer 700 tilts, the motor section 600 moves integrally with the reducer 700, and the drive shaft 630 and the rotating shaft 740 remain coaxial.

[0197] Therefore, the drive shaft 630 and the rotating shaft 740 are always inclined with respect to the reducer 700, so that the reducer 700 serves as the action point (P1) of a lever or a seesaw. That is, the reducer 700 serves as the first action point (P1) of a vibration system including the motor unit 600. Meanwhile, the reducer 700 is connected to the drum 200 via the rotating shaft 740, and the drum 200 is separated from the rear case 420, so that the load of the drum 200 is transmitted to the reducer 700. The reducer 700 can serve as the reference or action point (P1) of the vibration system, in which not only the motor unit 600 but also the system including the drum 200 forms one vibration system.

[0198] Although the reducer 700 itself serves as the center or point of application (P1) of the vibration system, it must be fixed or supported within the cabinet 100.

[0199] For this purpose, the reducer 700 is coupled and fixed to the rear case 420. In this case, since the reducer 700 tilts or vibrates while coupled to the rear case 420, it can be said that the rear case 420 plays the role of the center of a vibration system including the reducer 700, the motor unit 600, and the drum 200. Even in this case, the motor unit 600 is not directly coupled to the rear case 420 even though it can come into contact with it, but is coupled and fixed only to the reducer 700.

[0200] Specifically, the mounting portion 429 of the rear case 420 serves as a second point of action (P2) of the lever or seesaw formed by the reducer 700, the motor unit 600, and the drum 200.

[0201] After the reducer 700, the motor unit 600 and the drum 200 are arranged in parallel along the first axis (S1), the reducer 700 becomes parallel to the third axis (S3). The third axis (S3) passes through the reducer 700 coupled to the rear case 420. At this time, since the reducer 700 and the motor unit 600 are coupled, the motor unit 600 also becomes parallel to the third axis (S3).

[0202] As a result, the driving unit 600 and the drum 200 are coupled to the reducer 700, and the driving unit 600 and the drum 200 are inclined parallel to each other with the reducer 700 as a reference or vibrate simultaneously.

[0203] In the clothes treating device according to the present invention, the drum 200 is not connected to a belt, but is supported by the speed reducer 700. Therefore, when the drum 200 is rotated by the speed reducer 700, it is lifted upward or tilted downward by centrifugal force or the like.

[0204] To prevent this, the clothing treatment device according to the present invention further includes a stopper 500 for fixing the position of the drum 200. The stopper 500 includes a front stopper 510 disposed in front of the drum 200 and a rear stopper 520 disposed in the rear of the drum.

[0205] At this time, the drum 200 is lifted upward with respect to the rotation axis 740. Therefore, the front stopper 510 is disposed so as to contact the upper part of the front side of the drum.

[0206] In addition, the drum 200 may sag due to the weight of the clothes. Therefore, the rear stopper 520 is disposed so as to contact the rear lower part of the drum 200.

[0207] The front stopper 510 is coupled to the mounting portion 416 of the front case 410 , and the rear stopper 520 is supported on the upper portion of the heat exchanger 900 .

[0208] FIG. 7 is a diagram showing a stopper 500 for supporting the drum 200 of the clothes treating device according to the present invention.

[0209] The drum 200 rotates by being coupled to the free end of the rotating shaft 740. The rotating shaft 740 is fixed to the reducer 700 to prevent it from slipping out of the reducer 700.

[0210] However, the drum 200 may shift upward or downward due to the weight of the clothes or the clothes falling during rotation, etc. As a result, the drum 200 may shift upward or downward based on the free end of the rotating shaft 740.

[0211] In particular, the drum 200 vibrates or tilts separately based on the free end of the rotating shaft 740. That is, the drum 200 is made of a material having elasticity and allowing a certain level of deformation. This prevents excessive vibration or external force from being transmitted to the rotating shaft 740, and prevents the alignment of the rotating shaft 740 and the driving shaft 630 from becoming misaligned.

[0212] In addition, since the drum 200 is not fixed by a belt or the like, when it rotates with clothes stored therein, excessive vibration energy is generated.

[0213] Meanwhile, a front case 410 and a rear case 420 are disposed in front and rear of the drum 200. The front case 410 can be prevented from directly contacting the front of the drum 200 via the input communication hole 412 and the gasket 413. However, since the rear of the drum 200 is directly connected to the rotating shaft 740, the rear of the drum body 210 is shielded by the drum rear face 220, and the rear case 420 must be provided with a mounting part 429 for fixing the driving part (M) in a portion directly facing the drum rear face 220. That is, the rear case 420 cannot be disposed with a through hole on one surface facing the drum, unlike the front case 410.

[0214] Therefore, if the rear case 420 rotatably supports the rear or back surface of the drum 200 like the front case 410, there is a risk of direct friction and collision between the drum back surface 220 and the rear case 420.

[0215] Specifically, the rear case 420 has many parts that interfere with the drum back surface 220 due to the drum accommodating groove 422, the air movement hole 423, and the mounting portion 429, which will be described later. If the rear case 420 directly supports the drum 200 under such circumstances, the drum back surface 220 and the rear case 420 may be worn or damaged.

[0216] Therefore, the rear case 420 must be kept spaced apart from the drum 200 by a certain distance, and the rear case 420 itself cannot directly support the drum 200.

[0217] In addition, when drum 200 is rotated with a large amount of clothes stored therein, since there is no belt or the like, there is a possibility that drum 200 may rotate while moving in the direction of front case 410 or rear case 420.

[0218] Taking all of these factors into consideration, the laundry treatment device of the present invention further includes a stopper 500 that limits the movement of the drum 200 within an acceptable range.

[0219] The stopper 500 includes a front stopper 510 that is connected to the front case 410 and supports the front upper end of the drum, a support wheel 533 that is rotatably mounted on the front case 410 and supports the front lower end of the drum, and a rear stopper 520 that is connected to the rear case 420 and supports the rear lower end of the drum.

[0220] The drum 200 is supported and rotated by the driving unit (M) and the support wheel 533, and a front stopper 510 and a rear stopper 520 are provided to restrict the drum 200 from moving excessively. As a result, the front stopper 510 and the rear stopper 520 mitigate vibrations and temporary shocks of the drum 200, and the front stopper 510 and the rear stopper 520 can prevent the drum 200 from being damaged.

[0221] Referring to FIG. 7(a), the front stopper 510 includes a fixed plate 5111 connected to the stopper mounting portion 416 of the front case 410, a lever plate 5112 extending rearward from the fixed plate 5111, an extension plate 5113 extending downward from the lever plate 5112, a support plate 512 provided on the support plate 5113 at the upper end in front of the drum 200, and a felt 513 connected to the lower portion of the support plate 512 and in contact with the drum 200.

[0222] As a result, when the drum 200 is lifted upward, the lever plate 5112 and the extension plate 5113 of the front stopper 510 are lifted upward to a certain level, absorbing the impact of the drum 200, and the felt 513 rubs against the front of the drum 200 to prevent the drum 200 from being lifted excessively upward.

[0223] The outer circumferential surface of the input port 211 of the drum 200 extends to a diameter smaller than that of the drum body 210 and includes a grounding portion 213 with which the support wheel 533 and the felt 513 come into contact. As a result, the felt 513 and the support wheel 533 are accurately placed on the grounding portion 213, thereby restricting the movement of the drum 200.

[0224] The front stopper 510 is disposed at a specific distance from the upper front end of the drum 200. The specific distance corresponds to a distance at which the drum 200 can come off the gasket 413 during rotation, or a range at which the drum 200 can excessively twist the rotating shaft 740.

[0225] 7(b), the front stopper 510 is composed of a support plate 512 and a contact wheel 532 in which a felt 513 is in rotatable contact with the grounding portion 213.

[0226] As a result, the support wheel 533 supports the lower part of the ground contact portion 213 , and the contact wheel supports the upper part of the ground contact portion 213 , thereby preventing the drum 200 from coming off the input communication hole 412 .

[0227] 7(c), the rear case 420 and the drum 200 are separated, the rear stopper 520 and the driving unit (M) support the rear of the drum 200, and if the drum 200 approaches too close to the rear case 420, the rear stopper 520 prevents it. As a result, damage caused by friction or contact between the rear case 420 and the drum 200 can be prevented.

[0228] The rear stopper 520 is disposed in front of the rear case 420 to prevent the drum rear surface 220 from contacting or colliding with the rear case 420. When clothes are stored in the drum 200 and the drum 200 rotates, the drum 200 generates an external force that moves the drum 200 not only upward or downward but also forward or backward because the drum 200 is not fixed by a belt.

[0229] Since the rear case 420 supports the load of the driving unit (M), it needs to be made of a material that is thicker or has greater rigidity than the front case 410. Therefore, when the drum 200 moves downward, the rear case 420 supports the drum 200 without cushioning the movement of the drum 200, and therefore, a repulsive force that pushes the drum 200 upward may be generated.

[0230] During this process, the drum 200 is strongly pressed against the front case 410, and in a severe case, the door 130 is forced open.

[0231] Therefore, the rear stopper 520 is spaced apart from the rear of the drum 200 by a reference distance and allows the drum 200 to move rearward to a certain extent. This can prevent the drum 200 from excessively pressing the front case 410.

[0232] The reference distance is the distance at which the rear surface of drum 200 and rear stopper 520 can come into contact and support drum 200 when drum 200 is loaded with a reference amount of laundry or more and drum 200 is pushed rearward as it rotates.

[0233] This allows the rear stopper 520 to support the drum 200 only when the drum 200 moves rearward of the reference interval, thereby preventing wear of the rear stopper 520. A felt that comes into contact with the drum 200 is attached to the rear stopper 520.

[0234] In addition, the drum 200 and the rear case 420 are spaced apart from each other by a reference distance or more.

[0235] The rear stopper 520 includes a support connection portion 521 supported by the bottom surface of the cabinet 100 or the hot air supply portion 900, a support leg portion 522 extending from the support connection portion 521 toward the drum 200, an extension portion 524 extending diagonally forward from the support leg 522, and a limiting portion 525 extending from the extension portion 524 to face the drum rear surface 220.

[0236] The support leg 522 further includes a cutout groove 523 therein for enhancing rigidity.

[0237] The extension 524 extends obliquely from the support leg 522 to cushion the external force applied from the drum 200 to a certain level and to strengthen the overall rigidity of the rear stopper 520.

[0238] The extension 524 includes an inclined extension 5241 extending forward from the support leg 522 and a straight extension 5242 extending upward from the inclined extension 5241 .

[0239] The limiting portion 525 includes a spaced portion 5251 extending rearward from the linear extension portion 5242 and spaced apart from the drum rear surface 220 , and a load supporting portion 5252 provided at the spaced portion 5251 to face a lower portion of the drum rear surface 220 .

[0240] In order to reinforce the rigidity of the load support portion 5252, a curved portion 5253 is further provided by bending the free end of the load support portion 5252.

[0241] The rear stopper 520 can be prevented from directly contacting the rear of the drum 200 by the separating portion 5251. Instead, the drum 200 is allowed to move rearward to a certain level.

[0242] As a result, the rear case 420 is disposed between the rear stopper 520 and the reducer 700 or the driving unit 600 .

[0243] Meanwhile, the rear stopper 420 is disposed at a certain distance from the bottom of the drum, the certain distance being a distance at which the drum 200 deviates from the sealing portion 490 or a distance at which the rotation shaft 740 is excessively distorted.

[0244] That is, the linear extension 5242 is spaced apart from the rear of the drum 200 at a fixed distance.

[0245] FIG. 8 is a diagram showing the structure of a rear case 420 according to the present invention.

[0246] The motor unit 600 is connected and fixed to the reducer 700, and although the reducer 700 itself serves as the reference for the position and vibration of the driving unit (M), the reducer 700 needs to be supported in a position disposed on the rear side of the drum 200 in order to rotate the drum 200.

[0247] Therefore, the reducer 700 is placed on the rear case 420 and supported within the cabinet 100. However, the motor unit 600 and the drum 200 are disposed apart from the rear case 420. This can prevent the motor unit 600 or the drum 200 from moving separately from the reducer 700 due to interference with other components other than the reducer 700.

[0248] As a result, the rear case 420 serves as the point of action of a seesaw in a vibration or rotation system including the reducer 700, the motor section 600, and the drum 200.

[0249] The rear case 420 includes a rear plate 421 disposed on the rear side of the drum 200 and facing the front plate 411, and a drum receiving groove 422 protruding from the rear plate 421 in a shape facing the drum rear side 220. The drum receiving groove 422 is spaced apart from the drum rear side 220 and is formed to protrude from the rear plate 421 with a diameter and depth that partially receives the outer circumferential surface of the drum rear side 220. That is, the drum receiving groove 422 protrudes from the rear plate 421 by a first height (L1) so that the drum rear side 220 is partially received in front of the rear plate 421. The drum receiving groove 422 is provided with a plurality of communication holes 424 that face the suction holes 224 of the drum rear side 220 and through which air passes. Reinforcing bent portions 426 for enhancing rigidity are provided between the communication holes 424. The reinforcing bent parts 426 are formed to be recessed or protruded between the communication holes 424, to prevent the rigidity of the rear plate 421 arranged between the communication holes 424 from being weakened. The plurality of communication holes 424 are configured to supply hot air supplied from the hot air supply part 900 to the drum 200. At this time, since the drum accommodating groove 422 accommodates the drum rear surface 220, the hot air discharged from the communication holes 424 is guided to be supplied to the suction hole 224. Meanwhile, the clothing treatment device according to the present invention further includes a sealing part 450 for sealing between the drum accommodating groove 422 and the drum rear surface 220, and the sealing part 450 is accommodated and attached in the drum accommodating groove 422.

[0250] As a result, the drum receiving groove 422 not only enhances the rigidity of the rear plate 421 but also provides a space in which the sealing portion 450 is provided.

[0251] The mounting portion 490 is recessed into the drum accommodating groove 422 in the direction opposite to the direction in which the drum accommodating groove 422 protrudes. The mounting portion 490 is recessed by a depth L2 from the inner circumferential surface of the drum accommodating groove 422. By recessing the mounting portion 490 into the drum accommodating groove 422, the rigidity of the drum accommodating groove 422 can be increased, and at the same time, the overall rigidity of the rear plate 421 can be increased.

[0252] In addition, the mounting part 490 is recessed forward by L2 from the drum receiving groove 422, and is thus disposed closer to the drum rear surface 220. As a result, the distance between the reducer 700, which is attached and fixed to the mounting part 490, and the drum rear surface 220 can be reduced, and the length of the rotating shaft 740 connecting the reducer 700 and the drum rear surface 220 can be reduced accordingly, which not only ensures the durability of the rotating shaft 740, but also reduces the angle range in which the rotating shaft 740 is distorted.

[0253] In addition, the mounting part 490 is recessed into the drum receiving groove 422, but is formed to have a diameter larger than the reducer 700 and the driving part 600. As a result, at least a part of the reducer 700 and the motor part 600 is received in the mounting part 490, so that the overall thickness of the cabinet 100 can be reduced.

[0254] The mounting portion 490 includes a shaft through hole 4291 through which the rotating shaft 740 extending from the reducer 700 passes, a mounting surface 4292 provided on the outer circumferential surface of the shaft through hole 4291 and supporting the reducer 700, and a mounting groove 4294 extending rearward from the mounting surface 4292 to the drum accommodating groove. A fastening portion 4293 is provided on the mounting surface 4292 and coupled to the reducer 700 or a coupling portion 800 that couples the reducer 700 to the mounting surface 4292.

[0255] Meanwhile, at least a part of the reducer 700 or the motor unit 600 is housed in the mounting groove 4294. Accordingly, an electric wire support groove 4295 in which an electric wire that supplies current to the stator 610 is placed is formed by being recessed outward from the mounting groove 4294. The mounting groove 4294 is formed to be larger than the diameter of the driving unit (M).

[0256] The rear case 420 further includes an air movement hole 423 for transmitting the hot air supplied from the connector 930 to the duct cover 430. The air that has flowed into the air movement hole 423 flows along the duct cover 430 into the communication hole 424.

[0257] FIG. 9 is a diagram showing how the motor unit 600 of the clothes treating device according to the present invention is coupled to a reducer 700. As shown in FIG.

[0258] The reducer 700 is attached to and supported by the mounting portion 429 to rotate the drum 200. The stator 610 is directly connected to and fixed to the reducer 700 and is spaced apart from the mounting portion 429. The rotor 620 is supported by the reducer 700 via a drive shaft 630 connected to the reducer 700 to rotate the stator 610.

[0259] By coupling the stator 610 to the reducer 700, the reducer 700 and the motor unit 600 are arranged coaxially (S) in parallel. The motor unit 600 has a center of rotation coaxially (S), and the reducer 700 also has a center of rotation coaxially (S).

[0260] As a result, the rotor 620 also rotates about the same axis (S), and the rotating shaft 740 extending from the reducer 700 can also rotate about the same axis (S).

[0261] The reducer 700 is directly coupled to the stator 610 so as to fix the stator 610. The stator 610 is disposed apart from the rear case 420 or the mounting portion 429.

[0262] Of course, the stator 610 may be supported in contact with the rear case 420 , or may be further coupled to the rear case 420 if it is directly fixed to the reducer 700 .

[0263] The stator 610 is coupled to a reducer 700, which converts the rpm of the drive shaft 630 to rotate a rotating shaft 740, so that the drum 200 can also rotate about the same axis (S).

[0264] Even if the reducer 700 vibrates or rotates and the coaxial line (S) becomes misaligned, the drive shaft 630 and the rotation shaft 740 are arranged parallel to the coaxial line (S).

[0265] As a result, the reducer 700 is coupled and fixed to the rear case 420.

[0266] The reducer 700 is coupled to the rear of the rear case 420 , and the drum 200 is disposed in front of the rear case 420 , so that the rear case 420 is disposed between the drum 200 and the reducer 700 .

[0267] The reduction gear 700 has a drum rotation shaft 740 that penetrates the rear case 420 to rotate the drum, and supports the load of the drum via the drum rotation shaft 740.

[0268] In addition, the rear case 420 is disposed between the drum 200 and the motor unit 600. The speed reducer 700 is disposed between the drum 200 and the motor unit 600 and is supported by the rear case 420.

[0269] At this time, the drum 200 and the motor unit 600 are disposed completely separated from the rear case 420. Therefore, the reducer 700 serves as a supporting center for the drum 200 and the motor unit 600.

[0270] In addition, the drum 200 is disposed at a distance in front of the rear case 420, and the motor unit is disposed at a distance in the rear of the rear case 420. The reducer 700 penetrates the rear case from the rear and is coupled to connect the motor unit 600 and the drum 200 to each other.

[0271] Therefore, the drum 200 and the motor unit 600 can transmit at least a part of the load to the rear case 420 via the reduction gear 700 .

[0272] As a result, the motor unit 600, the reducer 700, and the drum 200 tilt or vibrate simultaneously with respect to the rear case 420.

[0273] In addition, since the stator 610 is fixed to the reducer 700 , the drive shaft 630 tilts together with the reducer 700 or vibrates simultaneously with the reducer 700 .

[0274] FIG. 10 is a diagram showing the external appearance of the reducer 700. As shown in FIG.

[0275] The reducer 700 includes reducer housings 710 and 720 that form the exterior and house a gear box therein. The reducer housings include a first housing 710 facing the motor unit 600 and a second housing 720 facing the drum 200.

[0276] 10(a), most of the gear box in the reducer 700 is accommodated inside the first housing 710, and the second housing 720 shields the inside of the reducer 700. This allows the overall thickness of the reducer 700 to be reduced and the length of the drum 200 to be further extended.

[0277] The second housing 720 includes an insulating body 722 that shields the first housing 710, a connecting body 721 that extends around the insulating body 722 and is connected to the first housing 710, and a shaft support portion 723 that supports a rotating shaft 740 in the insulating body 722.

[0278] The blocking body 722 is disk-shaped, and the connecting body 721 extends from the blocking body 722 toward a part of the first housing 710 with a constant thickness.

[0279] Of course, the coupling body 721 may be provided on the first housing 710 to couple the blocking body 722 thereto.

[0280] The shaft support 723 prevents the rotation shaft 740 from shifting and maintains the alignment of the rotation shaft 740 and the drive shaft 630 .

[0281] The combined body 721 is provided with a fastening portion 780 having a certain thickness for fastening the reducer 700 to the stator 610 or the mounting portion 429 .

[0282] The fastening portion 780 protrudes outward from the combined body 721 and is formed integrally with the combined body 721. The fastening portion 780 includes either a fastening protrusion 781 to be coupled to the stator 610 or a coupling protrusion 782 to be coupled to the mounting portion 429. A plurality of fastening protrusions 781 are provided along the outer circumferential surface of the combined body 721 and are spaced apart at the same angle with respect to the shaft receiving portion 713.

[0283] 10(b), the first housing 710 is formed in multiple stages and accommodates gears of various diameters. In general, a gearbox coupled to the reducer 700 includes a sun gear, planetary gears that revolve around the sun gear, and a ring gear that accommodates the planetary gears and allows the planetary gears to rotate. The first housing 710 is coupled to the second housing 720 and includes a ring gear housing 711 that accommodates the ring gear, and a planetary gear housing 712 that extends from the ring gear housing 711 away from the second housing 720 and accommodates one end of the planetary gear.

[0284] The planetary gear housing 712 is formed to have a smaller diameter than the ring gear housing 711. However, the center of the planetary gear housing 712 and the center of the ring gear housing 711 are arranged coaxially (S) with each other.

[0285] A drive shaft 630 is coupled to the planetary gear housing 712, and is rotatably coupled to the rotor 620. The drive shaft 630 is inserted into the first housing 710 and is rotatably supported by a gear box within the first housing 710.

[0286] The cleaning part 640, which rotatably supports the rotor 620, is placed on one surface of the planetary gear housing 712, and a cleaning protrusion 7121 is provided to which the cleaning part 640 is coupled and fixed. The planetary gear housing 712 also has a cleaning coupling hole 7122 to which the cleaning part 640 is rotatably coupled.

[0287] The cleaning protrusions 7121 and the cleaning coupling holes 7122 are provided at a predetermined angle with respect to the driving shaft 630 .

[0288] The fastening protrusion 781 is formed thicker and has a larger cross-sectional area than the connecting protrusion 782. This strengthens the connecting force between the fastening protrusion 781 and the stator 610, making it easier to withstand vibrations transmitted from the stator 610.

[0289] The stator 610 is placed on the fastening protrusion 781 and is coupled to the fastening protrusion 781 by a separate fastening member. The fastening protrusion has a fastening protrusion hole 7811 formed therein to receive a fastening member that penetrates the stator 610, and the fastening protrusion hole 7811 has a screw thread formed therein to couple with the fastening member.

[0290] FIG. 11 is a diagram showing a structure in which the stator 610 is coupled to the reducer 700. As shown in FIG.

[0291] The stator 610 includes a ring-shaped main body 611 fixed to the reducer 600, a fixing rib 612 extending from the inner circumferential surface of the main body 611 and coupled to the fastening protrusion 781, teeth 614 extending from the outer circumferential surface around the main body 611 and around which a coil is wound, pole shoes 615 provided at the free ends of the teeth 614 to prevent the coil from coming off, and a terminal 616 for controlling the supply of current to the coil.

[0292] The main body 611 has an accommodating space 613 therein, and a plurality of fixing ribs 612 are provided within the main body 611 at a certain angle apart from the accommodating space 613, and the inside of the fixing rib 612 has a fixing rib hole 6121 in which a fixing member to be coupled with the fastening protrusion 781 is provided.

[0293] Since the stator 610 is directly coupled to the reducer 700 , the reducer 700 is at least partially housed in and coupled to the stator 610 .

[0294] In particular, when the reducer 700 is accommodated in the stator 610, the overall thickness of the driving part (M) is reduced, and the volume of the drum 200 can be further expanded. In addition, when the reducer 700 is accommodated in the stator 610, the rotating shaft 740 of the reducer 700 and the driving shaft 630 can be more precisely maintained coaxially.

[0295] For this, the reducer 700 is formed to have a smaller diameter than the main body 611. That is, the first housing 710 and the second housing 720 are formed to have a maximum diameter smaller than the diameter of the main body 611. As a result, the reducer 700 is disposed with at least a portion thereof housed in the main body 611. However, the fastening protrusion 781 extends to overlap the fixing rib 612 in the reducer housing. As a result, the fastening protrusion 781 is coupled to the fixing rib 612, and a portion of the first housing 710 and the second housing 720 can be positioned within the main body 611.

[0296] The fixing rib 612 includes a first fixing rib 612 a directly connected to the fastening protrusion 781 , and a second fixing rib 612 b that is not directly connected to the fastening protrusion 781 but supports the fastening protrusion 781 and the first housing 710 .

[0297] The coupling protrusion 782 is disposed offset from the fastening protrusion 781 to prevent interference with the fastening protrusion 781.

[0298] FIG. 12 is a diagram showing a structure in which the motor unit 600 is coupled to the reducer 700. As shown in FIG.

[0299] The stator 610 is coupled to the reducer 700. It may be coupled to one surface of the reducer 700 or to a fastening protrusion 781 protruding outward from a housing of the reducer 700, so that at least a portion of the reducer housing is accommodated inside the main body 611. This allows the center of the main body 611, the center of the reducer 700, and the rotation shaft 630 to always be coaxial.

[0300] Meanwhile, the rotor 620 accommodates the stator 610 with a certain distance between it and the pole shoe 615. The rotor 620 is fixed to the reducer 700 whose drive shaft 630 is accommodated in the main body 611, so that the gap (G1) between the rotor 620 and the stator 610 is always maintained.

[0301] Therefore, it is possible to prevent the rotor 620 and the stator 610 from colliding with each other, or to prevent the stator 610 from rotating in a temporarily distorted state, thereby preventing the generation of unnecessary noise and vibration.

[0302] On the other hand, a first imaginary diameter line (D1) passing through the center of the reducer 700 and the center of the drive shaft 630, a second imaginary diameter line (D2) passing through the center of the main body 611, and a third imaginary diameter line (D3) passing through the center of the rotor 620 are all positioned at the rotation center of the drive shaft 630.

[0303] As a result, the reducer 700 itself becomes the center of rotation of the drive shaft 630, and the stator 610 is directly fixed to the reducer 700, preventing the drive shaft 630 from becoming misaligned with the reducer 700. As a result, the reliability of the reducer 700 can be guaranteed.

[0304] FIG. 13 is a diagram showing a structure in which the drum 200 is coupled to the driving unit (M).

[0305] The drum 200 and the driving unit (M) are provided in the cabinet 100. In this case, in order to increase the drying capacity, it is necessary to increase both the diameter and the length of the drum 200, and therefore the volume of the cabinet 100 also increases.

[0306] At this time, since the height and length of the cabinet 100 are fixed or standardized, in order to increase the drying capacity within the cabinet 100, the length of the drum 200 needs to be increased to the maximum.

[0307] As the length of the drive part (T3) becomes longer, the length of the drum (T2) becomes shorter and the drying capacity of the drum becomes smaller, so it is necessary to reduce the length of the drive part (T3) to maximize the length of the drum (T2) (see Figure 4).

[0308] A rotating shaft extends from the drum 200, and in order for the driving unit (M) to support and connect to the rotating shaft protruding from the drum, the driving unit (M) becomes longer in the direction of the rotating shaft in order to adequately support and accommodate the rotating shaft.

[0309] In addition, when the reduction gear 700 is provided as in the case of the clothing treatment device according to the present invention, the reduction gear 700 must be formed long in the direction of the rotation shaft in order to accommodate and support the rotation shaft extending from the drum without deforming it, which may increase the total length (T3) of the driving part (M) and reduce the length (T2) of the drum 200.

[0310] In addition, the reducer 700 includes a gear box coupled to the drive shaft 630, and the gear box has a complex structure. In such a situation, the rotating shaft extending from the drum 200 and the gear box cannot be manufactured integrally, so another component must be added to couple the rotating shaft extending from the drum 200 to the gear box.

[0311] Therefore, the volume of the reducer 700 is further increased, and the length (T2) of the drum 200 is further reduced.

[0312] Furthermore, in order for the rotating shaft to protrude from the drum rear surface 220, a spider must be formed that extends around the drum rear surface 220 and toward the inner periphery of the drum body 210 so that the rotating shaft is fixed to the drum rear surface 220. When the spider is coupled to the drum rear surface 220, the overall length (T2) of the drum is reduced or the internal volume of the drum is reduced by the thickness of the spider.

[0313] As a result, when the drive unit (M) accommodates and connects the rotating shaft extending from the drum by a female-male connection as in conventional drums (drive unit: female, drum: male), the end length (T3) of the drive unit from the outside of the drum back surface 220 unnecessarily increases, causing a problem that the length (T2) of the drum 200 is shortened by that amount.

[0314] Therefore, in the clothing treatment device according to the present invention, the rotating shaft 740 extends from the driving unit (M), and the drum 200 rotates coupled with the rotating shaft 740. In other words, the rotating shaft 740 protrudes from the driving unit, and the drum 200 rotates coupled with the free end of the rotating shaft 740 (driving unit: male, drum: female).

[0315] The center of the drum rear surface 220 is coupled to the free end of a rotating shaft 740 extending from the reducer 700, and receives the rotational force provided by the rotating shaft 740 to rotate the drum body 210.

[0316] Meanwhile, the drum 200 is rotatably supported by the stopper 500, such as the support wheel 533, and the front case, so that it can rotate easily by simply applying a rotational force to the drum 200. Therefore, the drum 200 can rotate easily by simply applying a rotational force to the drum 200 through the rotating shaft 740 extending from the reducer 700.

[0317] Furthermore, since the rotating shaft 740 is accommodated and supported by the reducer 700, the drum rear surface 220 does not require a spider to support the rotating shaft 740 to prevent distortion.

[0318] Therefore, the rotating shaft 740 supported by the reducer 700 is simply connected to the drum rear surface 220 to rotate the drum 200.

[0319] The reducer 700 is directly connected to the drum rear surface 220. However, the drum rear surface 220 needs to have a considerable thickness and rigidity in order to be firmly connected to the rotating shaft 740. In this case, the weight of the drum 200 increases unnecessarily, and a lot of energy is consumed when the reducer 700 rotates the drum 200.

[0320] Therefore, a bushing part 300 which is coupled to the rotating shaft 740 is further coupled to the drum rear surface 200. That is, the bushing part 300 is made of a strong material or is formed thick so that it can maintain its shape and rigidity even when the rotation direction is changed or the rotation is suddenly accelerated by being coupled to the rotating shaft 740, and the drum rear surface 220 is made of a softer material than the bushing part 300 or is formed thin.

[0321] As a result, the rotating shaft 740 extending from the reducer 700 is coupled to the bushing portion 300 , and the bushing portion 300 is coupled to the drum back surface 220 .

[0322] The drum rear surface 220 includes a circumferential portion 221 that shields the rear of the drum body 210, and a seat portion 223 that is provided inside the circumferential portion 221 and to which the bushing portion 300 is coupled. The circumferential portion 221 is provided with a suction hole that introduces hot air supplied from the hot air supply portion 900 into the drum body 210, and the outer circumferential surface of the circumferential portion 221 is provided with a coupling bent portion 2211 that is coupled to and fixed to the rear surface of the drum body 210.

[0323] The seat part 223 is located at the center of the drum rear surface 220, and is formed to have a diameter equal to or larger than that of the bushing part 300. A mounting hole 222 is formed at the center of the seat part 223 to receive a part of the bushing part 300 coupled to the shaft.

[0324] The seat part 223 is recessed inward from the circumferential part 221. The seat part 223 is recessed from the circumferential part 221 to strengthen the overall rigidity of the drum rear surface 220, and even if a rotational force is applied to the seat part 223 and the bushing part 300 is connected to the seat part 223, the rotational force is dispersed and the shape of the drum rear surface 220 can be maintained.

[0325] The seat portion 223 is formed to be larger in diameter than the reducer 700 and larger in diameter than the mounting plate 429, and is recessed forward from the drum rear surface 220 to accommodate at least a part of the driving portion (M).

[0326] As a result, the distance between the drum 200 and the driving unit (M) can be reduced, so that the length of the rotating shaft 740 can be further reduced, and the length (T2) of the drum can be further increased.

[0327] The seat portion 223 includes a receiving surface 2231 extending from the inner circumferential surface of the circumferential portion 221 toward the inside of the drum body 210, and a support surface 2232 extending from the receiving surface 2231 and facing the driving portion (M). An installation surface 2233 to which the bushing portion 300 is fixed is provided on the inner circumferential surface of the support surface 2232. A mounting hole 222 is provided on the inner circumferential surface of the installation surface 2233, and the installation surface 2233 is formed to have a diameter equal to or larger than that of the bushing portion 300, and further includes a coupling groove 2234 to be coupled to the bushing portion 300 by a bolt or welding.

[0328] The bushing portion 300 is fixed to the installation surface 2233 and coupled to the drum rear surface 220 , and is coupled to the free end of the rotating shaft 740 .

[0329] The bushing part 300 is coupled to the free end of the rotating shaft 740 and is coupled to the rotating shaft 740 by receiving therein a portion of the rotating shaft 740. This increases the coupling force between the rotating shaft 740 and the bushing part 300.

[0330] Meanwhile, the rotating shaft 740 is not circular, but is elliptical, or has a track shape with both sides semicircular and the other straight. Also, the bushing part 300 is in surface contact with the rotating shaft 740, whose cross section is formed in an elliptical and track shape. This makes it possible to prevent the rotating shaft 740 from spinning freely within the bushing part 300.

[0331] FIG. 14 is a diagram showing an embodiment of the bushing portion 300. As shown in FIG.

[0332] 14(a), the bushing part 300 includes a coupling surface 310 to which the coupling groove 2234 is fixed, and a shaft coupling part 320 provided inside the coupling surface 310 to which the rotating shaft 740 is coupled. The coupling surface 310 is formed in a plate shape and is placed and supported in the coupling groove 2234.

[0333] The bushing part 300 includes a recessed surface 330 recessed inward from the inner circumferential surface of the coupling surface 310 to further accommodate the rotating shaft 740 , and the shaft coupling part 320 is located inside the recessed surface 330 .

[0334] The shaft coupling portion 320 is formed in a pipe shape for coupling the rotating shaft 740 and extends forward or backward from the inner circumferential surface of the recessed surface 330 .

[0335] The recessed surface 330 may be formed in a cylindrical cone shape and inserted into the mounting hole 222 so as to be supported in contact with the inner circumferential surface of the mounting hole 222 .

[0336] 14( b ), the coupling surface 310 includes a plurality of bushing coupling portions 312 arranged radially extending from the recessed surface 330 or the shaft coupling portion 320 .

[0337] The bushing coupling portion 312 protrudes further outward from the coupling surface 310. The distance from the recessed surface 330 to the outer surface of the bushing coupling portion 312 is longer than the distance from the recessed surface 330 to the coupling surface 310 where the bushing coupling portion 312 is not formed. The bushing coupling portion 312 can further expand the area of ​​the coupling surface 310.

[0338] Also, the bushing coupling portion 312 protrudes in the thickness direction from the coupling surface 310. That is, the bushing coupling portion 312 is formed to be thicker than the coupling surface 310, or the coupling surface 310 is pressed in the thickness direction.

[0339] The bushing coupling portion 312 is provided protruding from the coupling surface 310 in a direction opposite to the recessed surface 330 .

[0340] The bushing coupling portion 312 is fixed to the coupling groove 2234 of the seat portion 223 and is coupled to the coupling groove 2234 by welding or by a fastening member such as a bolt.

[0341] The bushing coupling portion 312 further includes a coupling hole 311 through which a fastening member is passed and coupled. The bushing coupling portion 312 further protrudes in a thickness direction or outward direction from the coupling surface 310 to effectively distribute an external force applied to the fastening member.

[0342] The bushing coupling parts 312 are spaced apart by the same angle based on the recessed surface 330 or the shaft coupling part 320. That is, if there are n bushing coupling parts 312, they are spaced apart by 360 / n°. For example, if there are six bushing coupling parts 312, they are spaced apart by 60°.

[0343] Meanwhile, the bushing coupling part 312 protrudes from the coupling surface 310 in two stages. That is, it protrudes from the coupling surface 310 with a relatively wide diameter, and then protrudes further with a relatively narrow diameter from the protruding part. This is expected to effectively disperse the external force transmitted from the coupling member by the bushing coupling part 312 itself, and to increase the surface area that couples with the coupling member.

[0344] Similarly, the coupling groove 2234 formed in the seat portion 223 of the drum rear surface 220 is formed in two stages like the bushing coupling portion 312, so that the contact area between the coupling groove 2234 and the bushing coupling portion 312 is increased.

[0345] In addition, since the bushing coupling portion 312 is immediately fixed in the coupling groove 2234, the installation position of the bushing portion 300 can be easily determined, and the process of coupling the coupling members becomes easier.

[0346] Meanwhile, the shaft coupling part 320 includes a coupling body 321 to which the rotating shaft 740 is coupled. The coupling body 321 is formed in a pipe shape, and receives the free end of the rotating shaft 740 in surface contact therewith. The coupling body 321 has a cross-sectional shape corresponding to the cross-sectional shape of the rotating shaft 740.

[0347] The coupling body 321 includes an internal groove 322 into which a portion of the rotating shaft 740 is inserted and fixed, and the internal groove 322 is formed to have an area corresponding to the area of ​​the rotating shaft 740. The inner peripheral surface of the internal groove 322 is in surface contact with the rotating shaft 740. That is, the internal groove 322 is formed in the same shape as the cross-sectional shape of the rotating shaft 740, and is coupled to the rotating shaft 740 by contacting the outer peripheral surface of the rotating shaft 740.

[0348] In addition, the coupling body 321 includes a coupling plate 324 that is installed inside the internal groove 322 and faces the free end of the rotating shaft 740. The coupling plate 323 is installed facing the surface of the free end of the rotating shaft 740 and can also be in contact with and support the free end of the rotating shaft 740. The coupling plate 323 determines the length to which the rotating shaft 740 is inserted into the shaft coupling part 320. In addition, the coupling plate 323 can prevent the rotating shaft 740 from being excessively inserted even if an impact or vibration is transmitted to the rotating shaft 740.

[0349] The coupling plate 323 also has a rotating shaft coupling groove 3231 through which a coupling member coupled to the free end of the rotating shaft passes. The coupling member passes through the rotating shaft coupling groove 3231 and penetrates the rotating shaft 740 to be coupled thereto.

[0350] This prevents the rotating shaft 740 from being arbitrarily detached or separated from the bushing part 300. In addition, even if the drum 200 vibrates in the forward and backward directions, the position where the coupling plate 323 is coupled to the rotating shaft 740 is always fixed.

[0351] The internal groove 322 firmly fixes the rotating shaft 740 so that it does not rotate unnecessarily from the rotating shaft 740. To this end, a screw thread or groove gear 3221 for improving contact force with the rotating shaft 740 is provided on the inner peripheral surface of the internal groove 322.

[0352] The rotating shaft 740 may have serrations formed on its outer circumferential surface to be coupled with the groove gear 3221 .

[0353] As a result, when the rotating shaft 740 rotates, the bushing portion 300 rotates at the same rpm as the rotating shaft 740, and the bushing portion 300 rotates the drum 200.

[0354] On the other hand, if the cross section of the rotating shaft 740 is not circular but has a straight portion such as a polygon or track shape, and the cross section of the internal groove 322 is also formed in a shape corresponding to the cross section of the rotating shaft 740, the rotational force and rotational direction of the rotating shaft 740 are immediately transmitted to the internal groove 322.

[0355] As a result, even if the rotating shaft 740 suddenly accelerates or its direction of rotation is suddenly changed, the internal groove 322 immediately accelerates or changes its direction of rotation along with the rotating shaft 740. As a result, the rotation of the drum 200 is similarly controlled along with the rotating shaft 740.

[0356] Meanwhile, the coupling plates 323 are spaced apart by a certain distance from both ends of the combined body 321. That is, the coupling plates 323 are positioned inside the combined body 321, and an outer groove is formed at the free end of the combined body 321 to the coupling plates 323.

[0357] The free end of the coupling body 321 receives an outer circumferential surface of the coupling member inserted into the coupling groove 3231 through an outer groove, thereby preventing the coupling member from being exposed to the outside of the bushing part 300 .

[0358] Meanwhile, the recessed surface 330 is recessed by a first length (B1) from the coupling surface 310. The first length (B1) is set to a length smaller than the diameter of the coupling surface 310 or the diameter of the recessed surface 330.

[0359] As a result, the depth to which the rotating shaft 740 is accommodated in the bushing part 300 is increased by the depth of the recessed surface 330 as well as the shaft coupling part 321. Therefore, since the recessed surface 330 is located forward (toward the input port) 211 of the drum rear surface 220, the free end of the rotating shaft 740 may also be accommodated to be located forward (toward the drum input port) of the drum rear surface 220. In other words, the free end of the rotating shaft 740 may be coupled deeply to the drum 200 to an extent that it is located within the drum body 210.

[0360] As a result, even when the rotating shaft 740 rotates, distortion of the drum body 210 is eliminated, and the rotational force of the rotating shaft 740 can be transmitted to the bushing portion 300 more effectively.

[0361] The bushing portion 300 is simply recessed into the drum body 210 from the drum back surface 220 by the recessed surface 330 and the shaft coupling portion 320, and the drum back surface 220 is positioned rearward (toward the drive portion) of the free end of the rotating shaft 740 and the shaft coupling portion 320.

[0362] As a result, the area where the rotating shaft 740 and the drum 200 are joined increases, and the volume of the drum 200 also increases.

[0363] Meanwhile, in the shaft coupling portion 320 , the coupling body 321 extends in the opposite direction to the recessed surface 330 .

[0364] That is, when the recessed surface 330 extends from the coupling surface 310 away from the actuator (M), the coupling body 321 extends from the inner circumferential surface of the recessed surface 330 toward the actuator (M).

[0365] The coupling body 321 extends from the inner periphery of the recessed surface 330 a distance less than the extension of the recessed surface 330 from the coupling surface 310 .

[0366] This prevents the bushing part 300 from becoming excessively long, and at least a portion of the rotating shaft 740 is received and coupled within the recessed surface 330. That is, the internal space of the recessed surface 330 can be used as a space in which the rotating shaft 740 is coupled.

[0367] Of course, the coupling body 321 may further include a portion extending away from the driving unit (M) from the recessed surface 330. That is, the coupling body 321 may extend from the inner circumferential surface of the recessed surface 330 in both forward and backward directions (directions moving away from and toward the driving unit) at the same time.

[0368] FIG. 15 shows an embodiment in which the drive section (M) is coupled to a drum 200.

[0369] The reducer 700 is fixedly coupled to the rear case 420 .

[0370] The motor section 600 is disposed behind the reduction gear 700 and the rear case 420 , and the drum rear surface 220 is disposed in front of the rear case 420 and the reduction gear 700 .

[0371] The stator 610 of the motor section 600 is disposed away from the rear case 420, and the terminals 616 that supply current to the stator 610 are disposed near the rear case 420 or may be in contact with the rear case 420, but are not connected or fixed to the rear case 420.

[0372] The rotor 620 includes a permanent magnet 623 facing the stator 610, an installation body 622 coupled to the permanent magnet 623 and spaced apart from the outer circumferential surface of the stator 610, and a rotor body 621 extending from the installation body 622 and rotating opposite the stator 610. The rotor body 621 is formed in a disk shape having a diameter larger than that of the stator 610, and the installation body 622 is provided so that the outer circumferential surface of the rotor body 621 accommodates the outer circumferential surface of the stator 610. A drive shaft 630 is coupled to the center of the rotor body 621, and a plurality of inlet holes are formed penetrating between the drive shaft 630 and the installation body 622 to inject air into the stator 610.

[0373] The drive shaft 630 is connected to a stud 631 connected to the center of the rotor body 621 and extends into the reducer 700 .

[0374] A cleaning part 640 that rotatably supports the inner surface of the rotor body 621 is connected to the driving shaft 630. The cleaning part 640 includes a combined cleaning part 642 that is connected to the driving shaft 630, and a supporting cleaning part 641 that supports the rotor body 620 at the combined cleaning part 642.

[0375] The cleaning portion 640 can prevent the rotor 620 and the drive shaft 630 from distorting during rotation.

[0376] Of course, the cleaning unit 640 may be coupled to the reducer 700 instead of to the rotor 620 to rotatably support the rotor 620 .

[0377] The first housing 710 of the reducer 700 faces the rotor body 620 , and the second housing 720 is coupled to the first housing 710 and faces the drum rear surface 220 .

[0378] A gear box 730 is provided inside the first housing 710 and the second housing 720. The gear box 730 includes a sun gear 731 provided on or coupled to a free end of the drive shaft 630, at least one planetary gear 732 that rotates in mesh with the sun gear 731, a ring gear 733 that is coupled to the outer periphery of the planetary gear 732 to guide the rotation of the planetary gear 732, and a carrier 734 that rotatably supports the plurality of planetary gears 732.

[0379] The planetary gears 732 are arranged along the periphery of the sun gear 731, and each planetary gear 732 includes a first planetary body 7321 that rotates in mesh with the sun gear 731 and the ring gear 733, a second planetary body 7322 formed with a smaller diameter than the first planetary body 7321, and a gear shaft 7323 that rotatably supports the first planetary body 7321 and the second planetary body 7322 on the carrier 734.

[0380] When the sun gear 731 rotates, the planetary gear 732 rotates, causing the gear shaft 7323 to rotate, thereby causing the carrier 734 to rotate.

[0381] The carrier 734 includes a first carrier 7341 coupled to one end of the gear shaft 7323 and a second carrier 7342 coupled to the other end of the gear shaft 7323 .

[0382] The first carrier 7341 and the second carrier 7342 are formed in a ring or disk shape.

[0383] Meanwhile, a rotation shaft 740 extends from the center of rotation of the second carrier 7342. The rotation shaft 740 is provided integrally with the second carrier 7342 or is coupled to the second carrier 7342 and extends therefrom.

[0384] The first housing 710 includes a ring gear housing 711 that fixes the outer peripheral surface of the first planetary body 732 or the outer peripheral surface of the ring gear 733, a planetary gear housing 712 that extends from the ring gear housing 711 to rotatably accommodate the second planetary body 732 and the first carrier 7341, and a shaft accommodating portion 713 that extends from the planetary gear housing 712 and rotatably supports the drive shaft 630.

[0385] The ring gear housing 711 forms a side surface of the first housing 710, and the planetary gear housing 712 forms a part of the side surface of the first housing 710 and one surface facing the rotor 620. The shaft receiving portion 713 is formed in a pipe shape extending inside the planetary gear housing 712. The shaft receiving portion 713 is disposed in a space where the second planetary body 732 is formed to have a smaller diameter than the first planetary body 731. A drive bearing 770 that rotatably supports the drive shaft 630 is provided on the inner peripheral surface of the shaft receiving portion 713. A plurality of drive bearings 770 are provided spaced apart along the length of the drive shaft 630.

[0386] As a result, the driving bearing 770 and the shaft receiving part 713 do not protrude outside the reducer 700, but are disposed inside the reducer 700, thereby reducing the space in which the driving shaft 630 is disposed. That is, the volume of the reducer 700 itself is reduced, and the space between the reducer 700 and the motor part 600 can also be reduced.

[0387] Therefore, the overall thickness of the driving part (M) can be reduced, and the stator 610 can be coupled closer to the reducer 700 to prevent the driving shaft 630 from being distorted.

[0388] In addition, by disposing the drive bearing 770 and the shaft receiving portion 713 inside the reducer 700, the drive shaft 630 approaches the reducer 700, and the reducer 700 is disposed inside the stator 610. As a result, at least a portion of the reducer 700 can be disposed by utilizing the space of the motor unit 600.

[0389] As a result, the length of the drum 200 disposed between the rear case 420 and the front case 410 can be further extended, and the volume of the drum 200 can be increased.

[0390] Meanwhile, the second housing 720 includes a combined body 721 combined with the ring gear housing 711, a blocking body 722 that blocks the gear box 730 in the combined body 721, and a shaft support part 723 that extends from the blocking body 722 and rotatably supports the rotating shaft 740. The shaft support part 723 is formed in a pipe shape extending from the blocking body 722, and a shaft bearing 760 that rotatably supports the rotating shaft 740 is provided inside the shaft support part 723.

[0391] A plurality of shaft bearings 760 are provided at regular intervals along the length of the rotating shaft 740 .

[0392] The free end of the rotating shaft 740 is inserted into and coupled with the drum rear surface 220. At this time, the rotating shaft 740 and the drum rear surface 220 are arranged as close as possible. One of the shaft bearings 760 may be arranged in front of the drum rear surface 220.

[0393] When the drive shaft 630 is rotated by the rotor 620, the sun gear 731 rotates and the planetary gear 732 rotates in mesh with it. The first planetary body 7321 rotates in mesh with the ring gear 733, but since the ring gear 733 is fixed, the first planetary body 7321 rotates around the sun gear 731 due to a reaction.

[0394] The planetary gear 732 rotates the gear shaft 7323, which in turn rotates the carrier 734. When the carrier 734 rotates, the rotation shaft 740 extending from the second carrier 734 rotates.

[0395] At this time, the planetary gear 732 meshes with the sun gear 731, so even if it meshes with the sun gear 731 and rotates in the opposite direction, as the planetary gear 732 rotates with the ring gear 733, the carrier 734 rotates in the same direction as the sun gear 731 due to a reaction, and ultimately the rotating shaft 740 rotates in the same direction as the sun gear 731.

[0396] Meanwhile, since the diameter of the outer circumferential surface of the planetary gear 732 and the diameter of the carrier 734 are larger than the diameter of the sun gear 731, the rotating shaft 740 rotates at a lower rpm than the sun gear 731. Therefore, the rotating shaft 740 rotates at a lower rpm than the driving shaft 630. However, since no energy is wasted except for friction loss, the power transmitted to the driving shaft 630 is transmitted to the rotating shaft 740. Therefore, as the rotation speed of the rotating shaft 740 decreases, the torque, which is a rotational force, is amplified.

[0397] Since the reducer 700 converts the power corresponding to low torque and high rpm generated by the motor unit 600 into power corresponding to high torque and low rpm, it can be said that the reducer 700 converts the power of the motor unit 600 and transmits it to the drum 200.

[0398] Meanwhile, the axial direction of the driving shaft 630 and the axial direction of the rotating shaft 740 are arranged to be coaxial with each other. At this time, the driving shaft 630 is supported within the reducer 700, and the stator 610 is also fixedly coupled to the reducer 700, so that the direction of the driving shaft 630 and the reducer 700 is almost maintained.

[0399] At this time, since the gear box 730 is fixed in the reducer 700 in a gear coupling manner, and the rotating shaft 740 is also fixed in the gear box 730 by the reducer housing 720 and the bearing 770, the direction in which the rotating shaft 740 extends from the reducer 700 is maintained in most cases, and thus the rotating shaft 740 and the driving shaft 630 maintain the same axis. The rotating shaft 740 and the driving shaft 630 tilt together with the reducer housing or vibrate together with the reducer housing.

[0400] The rotating shaft 740 is supported by a shaft support part 723 extending from the second housing 720 and coupled to the bushing part 300. Specifically, the rotating shaft 740 is rotatably supported by one or more first bearings 760 provided on the inner peripheral surface of the shaft support part 723, and a free end of the rotating shaft 740 is inserted into the shaft coupling part 320 and fixed.

[0401] Hereinafter, a structure for minimizing the space occupied by the driving unit (M) alone in the cabinet and ensuring the length of the drum 200 will be described.

[0402] The overall length (T3) of the driving unit (M) corresponds to the length from the rear surface of the rotor 620 to the free end of the rotating shaft 740. In this case, if the driving unit (M) alone occupies a volume corresponding to the overall length (T3) in the cabinet 100, the drum length (T2) in which the drum 200 is disposed in the cabinet 100 is reduced, the volume in which clothes can be stored is reduced, and the space utilization rate in the cabinet 100 is significantly reduced.

[0403] Therefore, the clothing processing device of the present invention compactly arranges each component of the drive unit (M) or reduces the space occupied by the drive unit (M) alone with the drum 200 or rear case 420, and sets the total length (T3) of the drive unit (M) to be smaller than the sum of the thicknesses of each component of the drive unit (M).

[0404] First, the total length (T3) of the driving part (M) is shorter than the sum of the thickness (T31) of the motor part 600, which corresponds to the thickness of the stator 610 and the rotor 620, the total thickness (T32) of the reducer 700, and the length (T33) of the rotating shaft 740 exposed to the outside from the reducer 700.

[0405] Specifically, the reducer 700 is at least partially accommodated within the stator 610. That is, the reducer 700 is arranged utilizing the internal space of the stator 610, and is accommodated within the stator 610 by only the overlapping length (E1). The overlapping length (E1) corresponds to the length from the fastening portion 728 to the shaft accommodating portion 713.

[0406] As a result, the actual length (T3X) of the motor unit 600 and the reducer 700 is set to be smaller than the sum of the thickness (T31) of the motor unit 600 and the length (T32) of the reducer by the overlap length (E1). Therefore, the space occupied by the motor unit 600 and the reducer 700 can be reduced first by the overlap length (E1).

[0407] The overlapping length E1 corresponds to the length to which the reducer 700 and the motor unit 600 are themselves shortened.

[0408] The length of the driving section (M) can be reduced depending on the positional relationship with other components.

[0409] The reducer 700 is coupled to and supported by the rear case 420, and the motor unit 600 is not fixed to the rear case 420, so that the reducer 700 and the motor unit 600 are located on the rear surface of the rear case 420. The length that the driving unit 600 and the reducer 700 occupy in the rear case 420 is defined as an installation length (T3Y).

[0410] At this time, the drum 200 is disposed in front of the rear case 420 at a distance G from the rear case 420 so as not to interfere with the rear case 420 during rotation.

[0411] In the end, the reducer 700 and the motor unit 600 are arranged on the rear surface of the rear case 420, occupying a space of their own of the installation length (T3Y), and are separated from the drum 200 by a separation distance (G). Therefore, taking into account the length (T3) of the rotating shaft 420, the length (T3) occupied by the driving unit (M) may include at least the sum of the installation length (T3Y) and the separation distance (G).

[0412] In order to reduce the length (T3) of the driving part (M), the mounting part 429 of the rear case 420 is recessed by the accommodation depth (L2) toward the drum rear surface 220 or the bushing part 300. Also, the diameter of the mounting part 429 is formed larger than that of the rotor 620. That is, the mounting groove 4294 is recessed or extends obliquely by the accommodation depth (L2) from the rear plate 421 to the mounting surface 4292. As a result, the mounting part 429 can secure a space to accommodate either the reducer 700 or the motor part 600.

[0413] When the reducer 700 and the motor unit 600 are accommodated in the mounting portion 429, the reducer 700 and the motor unit 600 are disposed closer to the drum rear surface 220 than the rear plate 421 by the accommodation depth (L2).

[0414] As a result, the installation length (T3Y) of the reducer 700 and the motor unit 600 overlaps with the separation distance (G), and the reducer 700 and the motor unit 600 are arranged to overlap at least partially in a space corresponding to the separation distance (G).

[0415] Therefore, the volume corresponding to the storage depth (L2) of the installation length (T3Y) of the motor unit 600 and the reducer 700 can be arranged in a space corresponding to the separation distance (G).

[0416] As a result, the space in the cabinet 100 where the motor unit 600 and the reducer 700 are used independently of the drum 200 can be reduced by the storage depth (L2).

[0417] Furthermore, since the attachment portion 490 brings the reducer 700 closer to the drum 200 by the storage depth (L2), the length (T3) of the rotating shaft 740 can be reduced by that amount, and the overall length (T3) of the drive portion can be reduced.

[0418] Meanwhile, at least a part of the gear box 730 of the reducer 700 is made of a non-metallic material. For example, any one of the sun gear 731, the planetary gear 732, the ring gear 733, and the carrier 734 is made of a non-metallic material or a resin-based material.

[0419] If the sun gear 731, the planetary gear 732, the ring gear 733 and the carrier 734 are made of a sturdy metal material, not only can the durability of the sun gear 731, the planetary gear 732, the ring gear 733 and the carrier 734 be guaranteed even if they are formed small, but the power can be transmitted as is, thereby increasing the reliability of the reducer 700.

[0420] However, if the sun gear 731, the planetary gear 732, the ring gear 733 and the carrier 734 are made of metal materials, not only will the weight of the gearbox 730 increase, making it difficult to fix or support the reducer 700 within the cabinet 100, but the heat generated in the motor section 600 may be directly transferred to the gearbox 730, causing the reducer 700 to overheat.

[0421] Furthermore, if the sun gear 731, planetary gear 732, ring gear 733 and carrier 734 are all made of metal materials, the vibrations transmitted to the rotating shaft 720 and the drive shaft 630 will be transmitted as they are, which may result in damage to the sun gear 731, planetary gear 732, ring gear 733 and carrier 734 or distortion of the rotating shaft 720 and the drive shaft 630.

[0422] Therefore, any one of the sun gear 731, the planet gear 732, the ring gear 733, and the carrier 734 is made of a non-metallic material. For example, any one of the rotating shaft 720 and the driving shaft 630 is made of a resin series material such as reinforced plastic.

[0423] This not only reduces the load of the gear box 730 itself, but also blocks the transfer of heat generated in the motor unit 600 and partially buffers the vibrations transferred to the sun gear 731, planetary gear 732, ring gear 733, and carrier 734.

[0424] However, if any of the sun gear 731, planetary gear 732, ring gear 733, and carrier 734 is made of a non-metallic material, the volume becomes larger than when it is made of a metallic material, and the thickness (T3) of the reducer increases.

[0425] At this time, since the mounting portion 429 is recessed from the rear plate 421 by the accommodation depth (L2), the increased thickness (T3) of the reducer can be sufficiently buffered. Furthermore, the bushing portion 300 accommodates the rotating shaft 740 or the shaft support portion 723 of the reducer 700 through the recessed surface 330, and the increased thickness (T3) of the reducer can be reduced.

[0426] Meanwhile, if the rotating shaft 740 is forcibly shortened, the area for coupling with the drum 200 or the bushing part 300 cannot be sufficiently secured, so that the power generated by the driving part (M) may not be transmitted to the drum 200.

[0427] However, if the rotating shaft 740 is formed long, the total length (T3) of the driving part (M) becomes long, which is an adverse effect.

[0428] Therefore, the clothes treating device according to the present invention includes a bushing part 300 having a recessed surface 330 recessed into the drum 200. The bushing part 300 allows the shaft coupling part 320 to be positioned within the drum 200 by the recessed surface 330.

[0429] As a result, the rotating shaft 740 extending from the reducer 700 can be supported and coupled to the shaft coupling part 320 with a sufficient length, and can be positioned within the drum 200 by the recessed surface 330 .

[0430] As a result, at least a portion of the length (T3) of the rotating shaft 740 is disposed within the drum 200 by the bushing portion 300, so that the space occupied by the rotating shaft 740 and the drum 200 alone can be reduced.

[0431] On the other hand, in the reducer 700 , a shaft support portion 723 that supports a rotating shaft 740 passes through the attachment portion 429 .

[0432] That is, the shaft support portion 723 extends from the second housing 720 located on the rear surface of the mounting portion 429 toward the bushing portion 300 by the extension length (T3Z).

[0433] As a result, the actual length (T3X) of the reducer 700 and the motor unit 600 is the sum of the installation length (T3Y) and the extension length (T3Z).

[0434] This brings the reducer 700 and the bushing portion 300 even closer, and the length of the rotating shaft 740 can be reduced accordingly.

[0435] The extension length (T3Z) corresponds to a length extending from the second housing 720 such that at least a portion of the shaft support portion 723 is disposed within the bushing portion 300. For example, the shaft support portion 723 is disposed within the recessed surface 330 such that at least a portion of the first bearing 760 formed on the inner peripheral surface of the shaft support portion 723 is disposed within the bushing portion 300.

[0436] The extension length (T3Z) overlaps with the separation length (G). Specifically, the extension length (T3Z) overlaps with the separation length between the mounting part 429 and the bushing part 300 and is longer than the separation length between the mounting part 429 and the bushing part 300.

[0437] As a result, since a portion of the reducer 700 is located within the bushing portion 300, the thickness of the reducer 700 alone, regardless of the drum 200, can be further reduced by the extension length (T3Z) and the overlapping length of the bushing portion 300.

[0438] In addition, since the shaft support portion 723 is separated from the reducer 700 by the extension length (T3Z), the length (T33) that the rotating shaft 740 occupies by extending from the reducer 700 and being independent of the reducer 700 is disposed only within the drum 200.

[0439] As a result, the driving unit (M) is not disposed independently and completely separated from the rear surface of the drum 200. Therefore, the driving unit (M) can be disposed as compactly as possible by utilizing the space corresponding to the storage depth (L2) of the mounting portion 492, the depth (B1) of the recessed surface 330, and the extension length (T3Z) of the shaft support portion 723. As a result, the driving unit (M) can occupy a space in the cabinet corresponding to the exposed thickness (T3R) exposed from the rear surface of the rear panel 421.

[0440] In other words, the driving unit (M) can secure a compact area (T3C) that is not exposed to the rear surface of the rear case 420 by utilizing the space within the stator 610, the space between the drum rear surface 220 and the rear case 420 by the mounting portion 429, the space between the reducer 700 and the drum 200 by the shaft support portion 723, and the space within the drum body 210 by the bushing portion 300.

[0441] Therefore, the thickness that the drive unit (M) occupies within the cabinet is only the exposed thickness (T3R), which is the thickness of the exposed area from the rear case 420, which is the total thickness (T3) of the drive unit (M) minus the thickness corresponding to the compact area (T3C).

[0442] Therefore, the drive unit (M) further occupies only the exposed thickness (T3R) within the length T1 allowed within the cabinet 100, and does not occupy the compact thickness (T3C) alone, and the length (T2) of the drum is ensured to be larger by the maximum thickness (T3C) of the compact region.

[0443] FIG. 16 is a diagram showing another embodiment of the bushing portion 300 and the drum back surface 220. In FIG.

[0444] The bushing part 300 includes a coupling surface 310 placed on the drum rear surface 220, a shaft coupling part 320 coupled to the rotating shaft 740, and a recessed surface 330 for guiding the shaft coupling part 320 to be positioned forward of the drum rear surface 220. At this time, the recessed surface 330 extends from the coupling surface 310 by a second length (B2) set to be longer than any one of the diameter of the coupling surface 310, the diameter of the mounting hole 222, and the diameter of the recessed surface 330. That is, the recessed surface 330 extends deeper into the drum body 210 to accommodate more rotating shafts 740. As a result, the length that the rotating shafts 740 occupy outside the drum rear surface 220 can be reduced, and the additional area occupied by the driving part (M) can be further reduced.

[0445] On the other hand, the housing surface 2231 of the drum back surface 220 extends from the circumferential portion 221 longer than the second length (B2). The diameter of the housing surface 2231 is formed to be larger than the diameter of the rotor 620 or the stator 610, and is formed to be larger than the diameter of the mounting portion 429. As a result, the housing surface 2231 of the drum back surface 220 houses at least a portion of the mounting portion 429.

[0446] The receiving surface 2231 further includes a wire avoidance groove 2231a recessed outward to avoid the wire support groove 4295 provided in the mounting portion 429 or the like.

[0447] In addition, the seat part 223 can utilize the space within the receiving surface 2231 to minimize the space that the bushing part 300 occupies within the drum body 210. In other words, the bushing part 300 can utilize the space within the drum body 210 as a space to receive the rotating shaft 740 to reduce the overall length of the driving part (M), but the seat part 223 can also reduce the space that the bushing part 300 occupies within the internal space of the drum body 210.

[0448] For this reason, the sheet portion 223 may protrude so that the installation surface 2233 on which the bushing portion 300 is placed approaches the driving portion (M) on the support surface 2232. In other words, the installation surface 2233 may protrude in the opposite direction to the direction in which the storage surface 2231 recesses and extends from the support surface 2232.

[0449] The coupling surface 310 of the bushing part 300 is disposed closer to the driving part (M) than the support surface 2232 since the installation surface 2233 protrudes from the support surface 2232 to the outside of the drum rear surface 220 .

[0450] The coupling groove 2234 is formed to protrude further from the installation surface 2233 toward the driving part (M), and the bushing coupling part 312 is formed to receive the coupling groove 2234 so that the bushing part 300 is more firmly fixed to the seat part 223 .

[0451] In addition, since the installation surface 2233 is formed by bending the support surface 2232, the load of the bushing part 300 is dispersed, and the rigidity of the sheet part 223 can be increased. In addition, the coupling groove 2234 protrudes from the installation surface 2233, and can not only reinforce the rigidity of the coupling surface 310, but also firmly support the fastening member that is fastened by penetrating the coupling groove 2234.

[0452] FIG. 17 shows an embodiment in which a driving unit (M) is coupled to a drum rear surface 220 having a seat portion 223 and a mounting surface 2233.

[0453] 15, in the clothing treatment device according to the present invention, the overall thickness (T3) of the drive unit (M) is smaller than the sum of the thickness (T31) of the stator 610 or motor unit 600, the thickness (T32) of the reducer 700, and the thickness (T33) of the rotating shaft 740. This is because the stator 610, the reducer 700, and the rotating shaft 740 are compactly arranged to reduce the overall thickness of the drive unit (M).

[0454] For example, the reducer 700 is disposed in the internal space of the stator 610, and the installation spaces of the stator 610 and the reducer 700 overlap. Therefore, the total thickness of the motor unit 600 and the reducer 700 is smaller than the sum of the thicknesses of the motor unit 600 and the reducer 700, so that the area occupied by the driving unit (M) itself can be reduced. Therefore, the length of the drum (T2) can be increased by the length of overlap between the motor unit 600 and the reducer 700.

[0455] Also, in the mounting portion 429, the mounting surface 4292 is recessed from the rear plate 421 toward the drum rear surface 220 via the mounting groove 4294 by the storage depth (L2). Therefore, even when the reducer 700 and the motor unit 620 are disposed on the rear surface of the rear plate 420, the reducer 700 and the motor unit 620 can be disposed close to the drum 200 by the storage depth L2.

[0456] Therefore, the driving unit (M) not only reduces its thickness and volume, but also utilizes the empty space between the drum rear surface 220 and the rear plate 420. Since the driving unit (M) can utilize the space between the drum rear surface 220 and the rear plate 420, the rear panel 120 disposed on the rear surface of the driving unit (M) can be disposed closer to the rear plate 420.

[0457] This means that the clothing treatment device according to the present invention can position the rear plate 421 closer to the rear panel 120 with respect to the rear case 420. Therefore, the rear plate 421 can be positioned further rearward by the storage depth (L2), so that the length (T2) of the drum can be further increased by the storage depth (L2).

[0458] The above description has focused on maximizing the use of the rear space of the drum rear surface 220 to compactly dispose the drive unit (M).

[0459] In addition, the clothing treatment device according to the present invention can utilize the internal space of the drum body 210 to compactly arrange the driving unit (M) toward the drum 200.

[0460] In the clothing treatment device according to the present invention, the space occupied by the drum 200 and the space occupied by the rear case 420 or the space occupied by the driving unit (M) are arranged to overlap as much as possible, thereby making it possible to save the space occupied by the drum 200, the rear case 420 and the driving unit (M).

[0461] For example, in the clothing treatment device according to the present invention, the driving unit (M) is disposed inside the drum body 210 or in a part of the clothing storage space, so that the space occupied by the driving unit (M) in the cabinet 100 apart from the drum 200 is reduced.

[0462] Specifically, the clothing processing device of the present invention uses a portion of the space occupied by the drum 200 within the cabinet 100 as a drum space utilization area (C) in which any one of the bushing part 300, the drive part (M) and the rear case 420 is partially arranged.

[0463] The drum space utilization area (C) corresponds to an area that utilizes a part of the clothes storage space in the drum 200 as a space in which the bushing part 300, the driving part (M) or the rear case 420 is disposed.

[0464] The drum space utilization region (C) includes a space formed by a sheet portion 223 that is recessed from the drum rear surface 220 toward the drum's insertion port 211.

[0465] The seat part 223 is recessed by the utilization length (C1) from the drum rear surface 220. That is, the receiving surface 2231 of the seat part 223 extends obliquely from the inner peripheral surface of the circumferential part 221 by the utilization length (C1) toward the input port 211. As a result, the drum space utilization region (C) includes a space corresponding to the utilization length (C1) from the outer surface of the drum rear surface 220.

[0466] The accommodating surface 2231 is formed to be larger than the diameter of the mounting portion 429. Therefore, the accommodating surface 2231 accommodates at least a part of the mounting portion 429, and one face of the accommodating surface 2231 and at least one face of the mounting portion 429 are disposed opposite each other. As a result, a part of the rear case 420 is disposed in the drum space utilizing region (C).

[0467] The drum space utilization region (C) also diverges the distance (G) between the drum rear surface 220 and the rear case 420. For example, the circumferential portion 221 and the rear case 420 are spaced apart by a first distance (Ga), and the support surface 2232 and the mounting surface 4292 are spaced apart by a second distance (Gb) that is longer than the first distance (Ga).

[0468] In other words, the second distance (Gb) between the support surface 2232 and the mounting surface 4292 is kept relatively long, and the first distance (Ga) unrelated to the driving unit (M) is set relatively short, thereby making efficient use of the separation space (G) between the drum 200 and the rear case 420.

[0469] Meanwhile, the reducer 700 or the motor unit 600 is accommodated and attached to the mounting portion 429. Therefore, when the mounting portion 429 is accommodated in the accommodation surface 2231, at least a part of the reducer 700 and the motor unit 600 is disposed in the drum space utilization region (C).

[0470] As a result, at least a portion of the driving portion (M) is disposed in the drum space utilization region (C), and the exposed region (T3R) that the driving portion (M) occupies alone from the rear of the drum 200 can be reduced to a maximum extent.

[0471] Meanwhile, the outside of the drum space utilization area (C) is also the space utilized by the drum 200. In other words, from the perspective of the drum, the drum rear surface 220 can be extended to the area where the driving unit (M) is disposed or to the side of the driving unit (M), so that the length (T2) of the drum can be further extended.

[0472] The drum 200 can accommodate a part or the whole of the driving part (M) through the seat part 223, so that the drum rear surface 220 can be arranged to extend further rearward than the front surface of the driving part (M). As a result, the drum length (T2) becomes maximum, and the volume inside the drum is further expanded by the area corresponding to the accommodation length (C1).

[0473] As a result, the clothing treatment device according to the present invention not only allows the drive unit (M) to be formed compactly by utilizing the drum space utilization area (C), but also maximizes the drying capacity.

[0474] The drum space utilization region (C) further includes the space occupied by the bushing portion 300 on the drum rear surface 220 .

[0475] The bushing part 300 is a member that is coupled to the rotating shaft 740, and when it is protruded from the drum rear surface 220 and coupled thereto, the bushing part 300 is disposed at the receiving length C1.

[0476] However, the space occupied by the bushing part 300 may be arranged inside the drum 200 instead of outside the drum 200, thereby reducing the space occupied by the bushing part 300 alone.

[0477] In the bushing part 300, when the coupling surface 310 is coupled to the drum rear surface 220, the recessed surface 330 extends from the drum rear surface 220 into the drum body 210 by a first length (B1) or a second length (B2). In addition, the shaft coupling part 320 that receives the rotating shaft 740 is further extended from the inner peripheral surface of the recessed surface 330 in the direction of the input port 211.

[0478] Specifically, the recessed surface 330 and the shaft coupling portion 320 are located within the drum 200 by the total bushing length (C3), and the drum space utilization area (C) is further expanded.

[0479] As a result, since the bushing part 300 is disposed within the drum 200 by the bushing length C3, the volume occupied by the bushing part 300 alone, apart from the drum 200, can be minimized.

[0480] As a result, the space occupied by the bushing part 300 alone in the allowable length (T1) is reduced, and the space for securing the driving part (M) is increased accordingly, or the drum length (T2) can be further increased.

[0481] Meanwhile, the bushing length (C3) of the bushing part 300 is a length for accommodating the rotating shaft 740 in the drum 200. That is, the rotating shaft 740 is accommodated in the drum 200 by the bushing length (C3), and the lengths of the drum 200 and the driving part (M) are closer to each other, forming a more compact structure.

[0482] This reduces the length of the rotating shaft 740 extending from the second housing 720 of the reducer, thereby preventing distortion of the rotating shaft 740 within the reducer 700 to a maximum extent.

[0483] From the viewpoint of the drum 200, since the bushing length (C3) is included in the drum space utilization region (C), the drum back surface 220 can be disposed rearward of the free end of the rotating shaft 740. Therefore, the drum 200 can utilize a part of the space in which the rotating shaft 740 is disposed by extending alone from the drum back surface 220 as a clothing storage space.

[0484] That is, a longer drum length (T2) can be ensured.

[0485] Meanwhile, the installation surface 2233 further protrudes from the support surface 2232 toward the outside of the drum rear surface 220 by the reserved length (C2). As a result, the reserved length (C2) is disposed overlapping with the accommodation length (C1). Due to the reserved length (C2), the space corresponding to the accommodation length (C1) can be used dually as a space for disposing the driving part (M) or the mounting part 429 and a space for disposing the bushing part 300.

[0486] Thus, the region corresponding to the storage length (C1) corresponds to the space where the driving part (M) and the mounting part 429 and the drum 200 are overlapped, but also corresponds to the space where the bushing part 300 and the drum 200 are overlapped.

[0487] Since the installation surface 2233 is located on the inner circumferential surface of the support surface 2232, the diameter of the installation surface 2233 is smaller than the diameter of the outer circumferential surface of the support surface 2232 and the diameter of the storage surface 2231. In addition, the reserved length (C2) is shorter than the storage length (C1). This makes it possible to prevent the installation surface 2233 from being excessively bent by the support surface 2232, and at the same time, to prevent the installation surface 2233 from interfering with the drive unit (M).

[0488] Therefore, the volume of the area on the drum rear surface 220 corresponding to the secured length (C2) is smaller than the volume of the area on the drum rear surface 220 corresponding to the storage length (C1).

[0489] On the other hand, by the installation surface 2233 protruding from the support surface 2232 by the reserved length (C2), the seat surface 310 of the bushing part 300 is disposed closer to the attachment part 429 and therefore closer to the reducer 700.

[0490] As a result, the length of the rotating shaft 740 is further reduced, and the drum rear surface 220 and the reducer 700 are closer to each other. For example, the rotating shaft 740 is disposed so close to the drum rear surface 220 that even the first bearing 760 supporting the rotating shaft 740 in the reducer 700 is located within the recessed surface 330.

[0491] This ensures that the rotating shaft 740 and the drive shaft 630 are arranged in parallel, preventing the rotating shaft 740 from being bent or damaged by the load of the drum 200 and the clothes.

[0492] Taking all of these factors into consideration, the drum space utilization area (C) allows the drive unit (M) to be compactly arranged toward the drum rear surface 220.

[0493] The reduction gear 700 and the motor unit 600 are brought closer to the drum rear surface 220 by the storage length (C1), and the reduction gear 700 and the motor unit 600 are brought closer to the installation surface 2233 by the reserved length (C2).

[0494] Also, the free end of the rotating shaft 740 can be moved toward the drum 200 by the bushing length (C3) to bring the reducer 700 and the motor unit 600 closer to the rear surface 220 of the drum.

[0495] Therefore, the length of the area that the driving part (M) occupies alone in the cabinet behind the drum rear surface 220 among the actual length (T3) of the driving part (M) is reduced to the actual exposed area (T3R). The actual exposed area (T3R) corresponds to the area where the driving part (M) protrudes rearward from the rear plate 421 and is exposed.

[0496] The thickness of the actual exposed region (T3R) is less than 1 / 2 or 1 / 3 of the total thickness (T3) of the drive section (M), thereby shortening the drive section length (T3) occupied by the drive section of the allowable length (T1), thereby allowing the drum length (T2) to be further increased.

[0497] The present invention can be modified and embodied in various forms, and the scope of the invention is not limited to the above-described embodiments. Therefore, if the modified embodiments include the elements of the claims of the present invention, they can be said to belong to the scope of the present invention.

Claims

1. a drum for containing the garments; A hot air supplying unit disposed outside the drum to supply hot air to the inside of the drum; a drive unit disposed behind the drum, the drive unit including a rotation shaft for rotating the drum; The drum is a drum body having an inlet defined at a front surface thereof and providing a space for receiving the garments; a drum back surface coupled to a rear end of the drum body; The back surface of the drum is a back body coupled to an outer peripheral surface of the drum body to form a back surface of the drum; a seat portion recessed in the center of the rear body, A clothing processing device, wherein the diameter of the seat portion is larger than the diameter of the drive portion such that at least a portion of the drive portion is contained in the seat portion.

2. The drive unit is A motor unit disposed behind the drum to provide power to the drum; a reducer for converting the power of the motor unit and transmitting the converted power to the rotating shaft, The clothing processing device according to claim 1 , wherein the reduction gear is at least partially housed and disposed in the seat portion.

3. The reducer includes: a first housing for rotatably supporting a drive shaft rotated by the motor unit; a gear box accommodated in the first housing to convert the rpm of the drive shaft and rotate the rotary shaft; a second housing coupled to the first housing and accommodating the gear box, the second housing rotatably supporting the rotating shaft; The clothing treatment device according to claim 2 , wherein the second housing is at least partially contained and disposed within the seat portion.

4. The second housing includes: a housing body coupled to the first housing and accommodating the gear box; an extension body extending from the housing body and accommodating a portion of the rotating shaft; a plurality of bearings spaced apart by a predetermined distance along a longitudinal direction of the extension body to rotatably support the rotation shaft; The clothing treatment device according to claim 3 , wherein at least one of the plurality of bearings is housed in the seat portion.

5. The motor unit includes: a stator coupled to the reducer to generate a rotating magnetic field; a rotor that rotates due to the rotating magnetic field and rotates a drive shaft; The clothing treatment device according to claim 2 , wherein at least a portion of the stator is housed and disposed within the seat portion.

6. The clothing processing device according to claim 5 , wherein the rear body is disposed on a side of the stator.

7. The clothing processing device according to claim 1 , wherein a bushing portion for supporting a free end of the rotating shaft is coupled to the seat portion.

8. The sheet portion is A storage surface recessed from the rear surface of the drum toward the input port; a support surface extending from the housing surface and facing the drive unit; an installation surface disposed on an inner circumferential surface of the support surface, the bushing portion being placed on and supported by the installation surface; The clothing processing device of claim 7 , wherein the storage surface has a diameter larger than a diameter of the drive unit so as to accommodate at least a portion of the drive unit.

9. The clothing processing device according to claim 8 , wherein the installation surface protrudes from the support surface toward the drive unit.

10. The clothing processing device according to claim 8 , wherein the installation surface is recessed from the support surface in a direction opposite to the recession direction of the storage surface and is positioned inside the storage surface.

11. The clothing processing device according to claim 9, wherein the mounting surface further includes a coupling groove protruding toward the drive unit, the coupling groove being adapted to fix the bushing portion to the mounting surface.

12. The bushing portion is A coupling surface coupled to the installation surface; a recessed surface extending from the coupling surface and configured to receive at least a portion of the rotating shaft; a shaft coupling portion disposed on an inner circumferential surface of the recessed surface and coupled to the free end of the rotating shaft, The clothing treatment device of claim 8 , wherein the recessed surface is configured to extend away from the drive portion.

13. The clothing processing device according to claim 12, wherein the recessed surface and the axial connection portion are positioned closer to the input port than the installation surface when the connection surface is connected to the installation surface.

14. The clothing treatment device of claim 12, wherein the recessed surface and the axial coupling portion are located inside the drum body.

15. The clothing treatment device of claim 12, wherein the recessed surface extends from the coupling surface away from the drive portion such that the free end of the rotation shaft is located within the drum body.

16. the recessed surface extends from the coupling surface away from the drive portion; The clothing processing device according to claim 12, wherein the shaft coupling portion includes a coupling body that extends from the recessed surface toward the drive portion and accommodates the rotating shaft.

17. a drum having an opening defined at a front thereof for containing the garments; A hot air supplying unit disposed outside the drum to supply hot air to the inside of the drum; A motor unit disposed behind the drum for rotating a drive shaft; a reducer coupled to the drive shaft and configured to rotate at a lower RPM than the drive shaft, the reducer including a rotating shaft coupled to the drum; a rear case disposed between the drum and the motor unit, The reduction gear is coupled to the rear case, The rear surface of the drum includes a seat portion recessed toward the insertion port, The rear case is A rear plate disposed between the drum and the reducer; a mounting portion provided on the rear plate to which the reduction gear is attached, A clothing treatment device in which at least a portion of the attachment portion is housed in the sheet portion.

18. the reducer further includes a gear box that is engaged with the drive shaft to convert the RPM of the drive shaft and transmits power corresponding to the converted RPM to the rotating shaft; The clothing processing device of claim 17, wherein at least a portion of the gear box is made of a non-metallic material to reduce load or vibration transmitted to the rear case.

19. the motor unit includes a stator for generating a rotating magnetic field to rotate the drive shaft; The stator is coupled to the reducer and a rotor that is coupled to the drive shaft and rotates by the rotating magnetic field, The clothing processing device according to claim 17, wherein at least a portion of the gear box is made of a non-metallic material to prevent deformation due to heat generated by the motor unit or to prevent the heat from being transferred.

20. The clothing treatment device of claim 18, wherein the non-metallic material includes a resin-based material.

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