Laundry treatment apparatus

Abstract

A laundry treatment apparatus according to an embodiment of the present invention includes: a cabinet; a tub disposed inside the cabinet; a spring connecting the cabinet and the tub so that the tub is supported by the cabinet; and a damping unit that connects the cabinet and the spring to reduce vibration.

Description

Laundry treatment equipment

[0001] This specification relates to a laundry treatment device.

[0002] In general, a laundry treatment device is a device that processes laundry by applying physical and chemical actions to the laundry, such as a washing machine that removes dirt from the laundry, a dehydrator that spins the laundry in a washing tub at high speed to dehydrate the laundry, and a dryer that dries wet laundry by applying cold or hot air into the washing tub.

[0003] Such laundry treatment devices may include a tub that is accommodated in a hanging form inside a cabinet, and a drum that rotates within the tub while laundry (or fabric) is accommodated therein.

[0004] Since vibration is generated during the process of rotating the drum, the laundry treatment device is equipped with a device to buffer the vibration of the tub.

[0005] Prior art document 1, Korean Patent Publication No. 2001-0037669, discloses a vibration prevention device for a drum washing machine.

[0006] In the case of the vibration isolation device of prior art document 1, a spring and a damping means are provided on the upper side of the outer body, and a damper is provided on the lower side of the outer body.

[0007] In the case of prior art document 1, damping of up-down vibration and forward-backward vibration is possible, but since one side of the damping means is connected to the outer body and the other side is connected to the outer body, there is a disadvantage in that the vibration is transmitted as is to the outer body.

[0008] In Chinese Patent Publication No. CN109477277, which is a prior art document 2, a laundry treatment device is disclosed.

[0009] The laundry treatment device of prior art document 2 includes a casing, an alkaline liquid tank movably arranged within the casing, and a laundry drum rotatably arranged within the alkaline liquid tank about a horizontal axis extending across the longitudinal axis of the laundry treatment device.

[0010] The alkaline liquid cylinder is supported against the case by only one damping unit having constant damping characteristics by arranging two adjacent damping units spaced apart about the horizontal axis and staggered in the circumferential direction with respect to the adjacent damping units about the horizontal axis.

[0011] In the case of prior art document 2, the structure of a damper offset in the direction of the rotation axis is described, but the installation conditions for effective additional dampers with various angles are not presented, and there is a problem that the vibration reduction effect in the laundry treatment device is low.

[0012] One embodiment provides a laundry treatment device capable of effectively reducing vibrations occurring in various directions during operation.

[0013] Alternatively or additionally, one embodiment provides a laundry treatment device in which vibration is reduced from being transmitted to the cabinet during the vibration reduction process of the damping unit.

[0014] Alternatively or additionally, one embodiment provides a laundry treatment device in which the position of the damping unit can be easily changed depending on the vibration characteristics.

[0015] A laundry treatment device according to one aspect may include: a cabinet; a tub disposed inside the cabinet; a spring connecting the cabinet and the tub so that the tub is supported by the cabinet; and a damping unit connecting the cabinet and the spring to reduce vibration.

[0016] The tub may include a damping unit coupling portion to which the damping unit is coupled. The tub may include a spring coupling portion to which the spring is coupled.

[0017] The damping unit may include a first body connected to the damping unit coupling portion, and a second body movably connected to the first body and connected to the spring.

[0018] The above damping unit coupling portion may be positioned higher than the spring coupling portion in the tub.

[0019] The laundry treatment device may further include a first connector connecting the damping unit to the damping unit coupling portion.

[0020] The above damping unit coupling portion may include a first wall extending from the tub, and a second wall and a third wall extending from the first wall.

[0021] The second wall and the third wall may be spaced apart from each other to form a space. The first connector may be coupled to the second wall and the third wall between the second wall and the third wall.

[0022] The above first connector can be connected to the damping unit coupling portion so as to be rotatable about a first rotation center.

[0023] The above damping unit can be connected to the first connector so as to be rotatable about a second rotation center.

[0024] The first connector may include a first portion connected to the damping unit coupling portion, and a second portion and a third portion extending from the first portion and spaced apart from each other.

[0025] The first body may include a first connector coupling portion rotatably coupled to the second portion and the third portion.

[0026] The laundry treatment device may further include a second connector for connecting the damping unit to the spring.

[0027] The above damping unit can be connected to the second connector so as to be rotatable about a third rotation center.

[0028] The spring may include a winding portion in which a wire-shaped wire material is wound multiple times, a first extension portion extending from one side of the winding portion and coupled to the cabinet, and a second extension portion extending from the other side of the winding portion and coupled to the spring coupling portion of the tub.

[0029] The second connector may be connected to one of the first extension and the second extension.

[0030] The second connector is rotatably connected to the one extension portion and can move in the longitudinal direction of the one extension portion while connected to the one extension portion.

[0031] The second connector can be rotatably connected to the extension part.

[0032] The laundry treatment device may further include a movement limiting member connected to the first extension and the second connector to limit movement of the first extension of the second connector in the longitudinal direction.

[0033] The second connector may include a connector body that forms a receiving space in which the one extension portion is received.

[0034] The second connector may further include a guide slot for guiding the extension portion into the receiving space.

[0035] The second body of the above damping unit may include a second connector coupling portion for coupling with the second connector.

[0036] The second connector may include a first coupling portion and a second coupling portion extending from the connector body. The second connector coupling portion may be rotatably connected to the first coupling portion and the second coupling portion.

[0037] The above tub includes a coupling mechanism having a plurality of coupling portions, and the damping unit can be coupled to one of the plurality of coupling portions.

[0038] The above tub may include a coupling mechanism having a plurality of coupling portions, and the damping unit may include a first damping unit coupled to one of the plurality of coupling portions and the spring, and a second damping unit coupled to another of the plurality of coupling portions.

[0039] The tub may include a first coupling portion and a second coupling portion spaced apart from the first coupling portion in a front-rear direction. The damping unit may include a first damping unit connected to the first coupling portion and the spring, and a second damping unit connected to the second coupling portion and the spring.

[0040] The above laundry treatment device may further include a lower damping unit connecting the base of the cabinet and the lower side of the tub.

[0041] According to one embodiment, there is an advantage in that vibrations occurring in various directions during operation can be effectively reduced.

[0042] In one embodiment, there is an advantage in that the vibration transmission to the cabinet is reduced during the vibration reduction process of the damping unit.

[0043] In one embodiment, there is an advantage in that the position of the damping unit can be easily changed depending on the vibration characteristics.

[0044] In one embodiment, there is an advantage in that the addition of a damping unit is easy depending on the vibration characteristics.

[0045] Figure 1 is a plan view of a laundry treatment device according to the first embodiment.

[0046] Figure 2 is a front view of a laundry treatment device according to the first embodiment.

[0047] Figure 3 is a drawing showing a damping unit installed according to the first embodiment.

[0048] Figure 4 is a drawing showing the upper structure of a tub according to the first embodiment.

[0049] Fig. 5 (A) is a perspective view of a first connector according to the first embodiment, and Fig. 5 (B) is an exploded perspective view of the first connector according to the first embodiment.

[0050] Fig. 6 (A) is a plan view of a first connector body according to the first embodiment, and Fig. 6 (B) is a side view of the first connector body according to the first embodiment.

[0051] Figure 7 is a perspective view showing a spring, a second connector, and a second body according to the first embodiment.

[0052] Fig. 8 (A) is a perspective view of the second connector of the first embodiment, and Fig. 8 (B) is a plan view of the second connector of the present embodiment.

[0053] Fig. 9 (A) is a drawing showing an example of a second connector and a spring being combined according to the first embodiment, and Fig. 9 (B) is a drawing showing a modified example of a second connector and a spring being combined.

[0054] FIG. 10(A) is a drawing showing the degrees of freedom of the damping unit in a state where the damping unit according to the first embodiment is connected to the first joint by the first connector.

[0055] FIG. 10(B) is a drawing showing the degrees of freedom of the damping unit in a connected state in which the damping unit according to the first embodiment is connected to the spring by the second connector.

[0056] Fig. 11 is a drawing showing a state in which a damping unit according to the second embodiment is installed in a tub.

[0057] Fig. 12 is a plan view showing a state in which the first damping unit and the second damping unit according to the third embodiment are installed in a tub.

[0058] Fig. 13 is a drawing showing a state in which a first damping unit and a second damping unit are connected to a spring according to a third embodiment.

[0059] Fig. 14 is a drawing showing a state in which a movement restriction part is connected to a second connector according to the fourth embodiment.

[0060] Fig. 15 (A) is a drawing showing a movement restriction according to the fourth embodiment, and Fig. 15 (B) is a cross-sectional view taken along 15B-15B of Fig. 14.

[0061] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. When designating components in each drawing, it should be noted that, where possible, identical components will be given the same reference numerals, even if they appear in different drawings. Furthermore, when describing embodiments of the present invention, detailed descriptions of related known structures or functions will be omitted if they are deemed to hinder understanding of the embodiments of the present invention.

[0062] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms. When it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the component may be directly connected, coupled, or connected to the other component, but another component may also be "connected," "coupled," or "connected" between each component.

[0063] In this specification, the upper part of the tub may refer to a part located above a bisector when dividing the height of the tub into two equal parts or dividing it in an up-down direction based on the center of gravity, and the lower part of the tub may refer to a part located below the bisector.

[0064] Fig. 1 is a plan view of a laundry treatment device according to a first embodiment. Fig. 2 is a front view of a laundry treatment device according to the first embodiment.

[0065] In FIG. 1 and FIG. 2, a state in which a portion of the cabinet has been removed is shown as an example.

[0066] Referring to FIGS. 1 and 2, the laundry treatment device (1) of the present embodiment may include a cabinet (10) forming an outer shape.

[0067] The above cabinet (10) can be formed by a single member or by combining multiple members.

[0068] The laundry treatment device (1) may further include a tub (20) placed inside the cabinet (10). If the laundry treatment device (1) is a washing machine, washing water may be accommodated in the tub (20).

[0069] The laundry treatment device (1) may further include a drum (25) disposed inside the tub (20) and containing laundry. The drum (25) may be rotated by a driving unit (not shown). The drum (25) may include an opening (251). Laundry may be introduced into the drum (25) or taken out from the drum (25) through the opening (251). The opening (251) may be opened and closed by a door (not shown).

[0070] The laundry treatment device (1) may further include a spring (30) for supporting the tub (20) to the cabinet (10). For example, a plurality of springs (30) may be connected to the cabinet (10) to support the tub (20).

[0071] Although not limited, one of the plurality of springs (30) may be connected to the upper right side of the tub (20), and other springs may be connected to the upper left side of the tub (20).

[0072] The above laundry treatment device (1) may further include a damping unit (40) connected to the upper portion of the tub (20).

[0073] The above damping unit (40) is connected to the upper portion of the tub (20) and a spring (30) to reduce vibrations including front-back and left-right vibrations of the tub (20). The above damping unit (40) may be called an upper damping unit.

[0074] In this embodiment, the X-axis direction may be the left-right direction of the laundry treatment device (1), the Y-axis direction may be the front-back direction of the laundry treatment device (1), and the Z-axis direction may be the up-down direction of the laundry treatment device (1).

[0075] The above damping unit (40) can be arranged to intersect at least two axes among the X-axis, Y-axis, and Z-axis.

[0076] For example, the damping unit (40) may be arranged to intersect the X-axis, Y-axis, and Z-axis. One end and the other end of the damping unit (40) may be arranged to be spaced apart in the X-axis direction. One end and the other end of the damping unit (40) may be arranged to be spaced apart in the Y-axis direction. One end and the other end of the damping unit (40) may be arranged to be spaced apart in the Z-axis direction.

[0077] The laundry treatment device (1) may further include a lower damping unit (80) connected to the lower portion of the tub (20). For example, a plurality of lower damping units (80) may be connected to the lower portion of the tub (20) and the base (11).

[0078] Although not limited, one or more lower damping units (80) may be connected to the lower right side of the tub (20), and one or more lower damping damping units (80) may be connected to the lower left side of the tub (20).

[0079] In the present embodiment, vibration generated during the operation of the laundry treatment device (1) can be reduced by the spring (30), the damping unit (40), and the lower damping unit (80).

[0080] Figure 3 is a drawing showing a damping unit installed according to the first embodiment.

[0081] Referring to Fig. 3, one side of the damping unit (40) can be connected to the first coupling portion (210) provided in the tub (20). The other side of the damping unit (40) can be connected to a spring (30) coupled to the cabinet (10).

[0082] One side and the other side of the above damping unit (40) can be positioned at different heights.

[0083] The above damping unit (40) may include a first body (410) and a second body (430) that is movable relative to the first body (410).

[0084] In the present embodiment, the damping unit (40) generates a damping force by the relative movement of the first body (410) and the second body (430), and the structure of the damping unit (40) is not limited thereto.

[0085] The above damping unit (40) can be movably connected to the first coupling portion (210) by the first connector (50).

[0086] The above damping unit (40) can be movably connected to the spring (30) by a second connector (60).

[0087] For example, the first connector (50) may be movably connected to the first coupling portion (210). The first body (410) may be movably connected to the first connector (50).

[0088] The second connector (60) can be movably connected to the spring (30). The second body (430) can be movably connected to the second connector (60).

[0089] The above cabinet (10) may include a spring coupling portion (101) to which the spring (30) is coupled.

[0090] The above spring (30) may be, for example, a coil spring.

[0091] The spring (30) may include a winding portion (310) in which a wire-shaped wire material is wound multiple times, a first extension portion (312) extending from one side of the winding portion (310), and a second extension portion (314) extending from the other side of the winding portion (310).

[0092] The first extension portion (312) may be coupled to the spring coupling portion (101). The second extension portion (314) may be coupled to the tub (20). The tub (20) may be provided with a spring coupling portion (202) to which the second extension portion (314) is coupled.

[0093] The above first coupling portion (210) can be positioned higher than the spring coupling portion (202) in the tub (20).

[0094] The above damping unit (40) can be connected to the first extension (312) or the second extension (314).

[0095] For example, FIG. 3 illustrates that the damping unit (40) is connected to the first extension (312). The second connector (60) can be connected to the first extension (312).

[0096] Figure 4 is a drawing showing the upper structure of a tub according to the first embodiment.

[0097] Referring to Fig. 4, the tub (20) may include a first coupling portion (210). The first coupling portion (210) may be positioned adjacent to the front end of the tub (20). The front end of the tub (20) may be an end adjacent to the opening (251) of the drum (25).

[0098] The above tub (20) may further include a second coupling portion (230). The second coupling portion (230) may be positioned spaced apart from the first coupling portion (210) in the Y-axis direction. For example, the second coupling portion (230) may be positioned adjacent to the rear end of the tub (20).

[0099] The second coupling part (230) may be positioned higher than the spring coupling part (202) in the tub (20). The first coupling part (210) and the second coupling part (230) may be collectively referred to as a damping unit coupling part.

[0100] As in the present embodiment, when a single damping unit (40) is provided, the damping unit (40) may be connected to the first coupling portion (210) or to the second coupling portion (230).

[0101] The vibration reduction characteristics may be different when the damping unit (40) is connected to the first coupling portion (210) and when the damping unit (40) is connected to the second coupling portion (230). Depending on the type of the laundry treatment device (1), the connection position of the damping unit (40) may be different. For example, depending on the inclination angle, arrangement, capacity, shape, etc. of the drum (30) within the tub (20), the connection position of the damping unit (40) may be different.

[0102] When the damping unit (40) is connected to the first coupling portion (210), the effect of reducing vibration occurring at the front side of the tub (20) can be increased. When the damping unit (40) is connected to the second coupling portion (230), the effect of reducing vibration occurring at the rear side of the tub (20) can be increased.

[0103] The first connecting portion (210) may include a first wall (211) extending upward from the tub (20), a second wall (212) and a third wall (213) extending from the first wall (211) in a direction intersecting the first wall (211).

[0104] The second wall (212) and the third wall (213) may be spaced apart from each other and may extend upward from the tub (20). The second wall (212) and the third wall (213) may extend rearward from the first wall (211). Accordingly, the first connecting portion (210) may include an upper opening and a rear opening.

[0105] Since the second wall (212) and the third wall (213) are spaced apart from each other, a first space (214) in which the first connector (50) is positioned can be provided between the second wall (212) and the third wall (213).

[0106] A first hole (215) may be formed in each of the second wall (212) and the third wall (213). In order to reinforce the strength of the first joint (210), one or more strength reinforcing walls (216) may be formed in at least one of the second wall (212) and the third wall (213).

[0107] The second connecting portion (230) may include a first wall (231) extending upward from the tub (20), a second wall (232) and a third wall (233) extending from the first wall (231) in a direction intersecting the first wall (231).

[0108] The second wall (232) and the third wall (233) are spaced apart from each other and can extend upward from the tub (20). The second wall (232) and the third wall (233) can extend forward from the first wall (231). That is, the second wall (232) and the third wall (233) can extend from the first wall (231) toward the first connecting portion (210).

[0109] Accordingly, the second connecting portion (230) may include an upper opening and a front opening.

[0110] Since the second wall (232) and the third wall (233) are spaced apart from each other, a second space (234) in which the first connector (50) is positioned can be provided between the second wall (232) and the third wall (233).

[0111] A second hole (235) may be formed in each of the second wall (232) and the third wall (233). In order to reinforce the strength of the second joint (230), one or more strength reinforcing walls (236) may be formed in at least one of the second wall (232) and the third wall (233).

[0112] Fig. 5 (A) is a perspective view of a first connector according to the first embodiment, and Fig. 5 (B) is an exploded perspective view of the first connector according to the first embodiment.

[0113] Fig. 6 (A) is a plan view of a first connector body according to the first embodiment, and Fig. 6 (B) is a side view of the first connector body according to the first embodiment.

[0114] Referring to FIGS. 5 and 6, the first connector (50) may include a first connector body (510).

[0115] The first body (410) of the above damping unit (40) can be connected to the first connector body (510).

[0116] The first connector body (510) may include a first portion (511). The first portion (511) may be formed in a cylindrical shape including, for example, a hole (512).

[0117] The first connector body (510) may include a second portion (513) and a third portion (514) extending from the first portion (511). The first body (410) of the damping unit (40) may be coupled to the second portion (513) and the third portion (514).

[0118] Accordingly, the second part (513) and the third part (514) can be called a damping unit connection part.

[0119] The second portion (513) may extend from one point of the first portion (511). The third portion (514) may extend from another point of the first portion (511).

[0120] The second part (513) and the third part (514) may be spaced apart from each other. The second part (513) and the third part (514) may be positioned facing each other.

[0121] At least a portion of the third portion (514) may be parallel to the second portion (513).

[0122] Each of the second part (513) and the third part (514) may include a joining hole (516).

[0123] The first body (410) of the damping unit (410) may include a first connector coupling portion (411). The first connector coupling portion (411) may be rotatably connected to the second portion (513) and the third portion (514).

[0124] The first connector coupling portion (411) can be inserted into the space between the second portion (513) and the third portion (514). The first connector coupling portion (411) can include a coupling protrusion (412) for coupling to the coupling hole (516).

[0125] When a part of the first connector coupling portion (411) is inserted into the space between the second portion (513) and the third portion (514), the coupling protrusion (412) can be inserted into the coupling hole (516).

[0126] In the present embodiment, in order for the coupling protrusion (412) to be easily coupled to the coupling hole (516), a neck portion (515) may be provided at least at one of the connecting portions of the second portion (513) and the first portion (511) and the connecting portions of the third portion (514) and the first portion (511). The thickness of the neck portion (515) may be smaller than the thicknesses of the second portion (513) and the third portion (514).

[0127] In the process of inserting the first connector coupling portion (411) into the space between the second portion (513) and the third portion (514), at least one of the second portion (513) and the third portion (514) may be deformed in a direction away from each other by the neck portion (515). When the coupling protrusion (412) of the first body (410) is aligned with the coupling hole (516), at least one of the second portion (513) and the third portion (514) may return to its original shape.

[0128] Each of the second part (513) and the third part (514) may include a recessed portion (517) for guiding the insertion of the coupling protrusion (412). The recessed portion (517) may be formed at an end of each of the second part (513) and the third part (514).

[0129] The above-mentioned recessed portion (517) may include an inclined surface (518). By virtue of the inclined surface (518), the recessed depth of the above-mentioned recessed portion (517) may decrease from the ends of the second portion (513) and the third portion (514) toward the coupling hole (516).

[0130] When the coupling protrusion (412) is moved toward the coupling hole (516) within the recessed portion (517) while the coupling protrusion (412) is aligned with the recessed portion (517), the coupling protrusion (412) can be inserted into the coupling hole (516).

[0131] The above-mentioned coupling protrusion (412) may be provided with an inclined surface (413) to enable the coupling protrusion (412) to be easily inserted into the recessed portion (517).

[0132] The first connector (50) may further include a bushing (530) coupled to the first part (511). The bushing (530) may be formed of a material that can be deformed by an external force.

[0133] The above bushing (530) may include a first part (531) accommodated in the hole (512), and a second part (532) and a third part (533) provided on both sides of the first part (531). The diameter of the first part (531) may be equal to or smaller than the diameter of the hole (512).

[0134] The diameters of the second part (532) and the third part (533) may be larger than the diameters of the first part (531) and the hole (512).

[0135] The above bushing (530) may include a slot (534).

[0136] The above first connector (50) may further include a pin guide (550) coupled to the bushing (530).

[0137] The pin guide (550) can be inserted into the slot (534) of the bushing (530). The pin guide (550) can include a first section (551) and a second section (553) provided on one side of the first section (551).

[0138] The diameter of the second section (553) may be larger than the diameter of the first section (551). The diameter of the second section (553) may be larger than the diameter of the slot (534).

[0139] The first section (551) may be inserted into the slot (534), and the second section (553) may be positioned outside the slot (534).

[0140] The above pin guide (550) may include a through hole (554).

[0141] The above first connector (50) may further include a pin (570) that penetrates the through hole (554) of the pin guide (550).

[0142] The pin (570) may include a body portion (571) and a hook (573) located on one side of the body portion (571). The pin (570) may include a head portion (572) located on the other side of the body portion (571).

[0143] Referring to FIGS. 3 to 6, the bushing (530) is coupled to the first connecting body (510), and the pin guide (550) is inserted into the bushing (530), and the first connecting body (510) can be inserted into the first space (214) of the first coupling portion (210).

[0144] When the first connecting body (510) is inserted into the first space (214), the through hole (554) of the pin guide (550) can be aligned with the first hole (215) of the second wall (212) and the third wall (213).

[0145] The above pin (570) can be joined on either side of the second wall (212) or the third wall (213).

[0146] For example, the pin (570) may be coupled to penetrate the first hole (215) of the third wall (213), then the through hole (554) of the pin guide (550), and then the first hole (215) of the second wall (212).

[0147] Even when the first connector (50) is coupled to the second connecting portion (230), it can be coupled in the same manner as when it is coupled to the first connecting portion (210).

[0148] Fig. 7 is a perspective view showing a spring, a second connector, and a second body according to the first embodiment. Fig. 8 (A) is a perspective view of the second connector of the first embodiment, and Fig. 8 (B) is a plan view of the second connector of the present embodiment.

[0149] Referring to FIGS. 7 and 8, the second body (430) of the damping unit (40) may include a second connector coupling portion (440).

[0150] The second connector coupling portion (440) may include a first member (441). The second connector coupling portion (440) may include a second member (442) and a third member (443) extending from the first member (441).

[0151] The above second connector (60) can be coupled to the second member (442) and the third member (443).

[0152] The second member (442) may extend from one point of the first member (441). The third member (443) may extend from another point of the first member (441).

[0153] The second member (442) and the third member (443) may be spaced apart from each other. The second member (442) and the third member (443) may be positioned facing each other.

[0154] At least a portion of the third member (443) may be parallel to the second member (442).

[0155] Each of the second member (442) and the third member (443) may include a joining hole (445).

[0156] A part of the second connector (60) can be inserted into the space between the second member (442) and the third member (443).

[0157] A neck portion (444) may be provided at least at one of the connecting portions of the second member (442) and the first member (441) and the connecting portions of the third member (443) and the first member (441). The thickness of the neck portion (444) may be smaller than the thicknesses of the second member (442) and the third member (443).

[0158] The second connector (60) may include first and second coupling portions (621, 623) inserted into the coupling hole (445).

[0159] Each of the second member (442) and the third member (443) may include a recessed portion (446) for guiding the insertion of each of the connecting portions (621, 623). The recessed portion (446) may be formed at an end of each of the second member (442) and the third member (443).

[0160] The above-mentioned recessed portion (446) may include an inclined surface (447). By virtue of the inclined surface (447), the recessed depth of the above-mentioned recessed portion (446) may decrease from the ends of the second member (442) and the third member (443) toward the joining hole (445).

[0161] The above second connector (60) may include a second connector body (610).

[0162] The second connector body (610) may include an accommodation space (612) in which the first extension portion (312) or the second extension portion (314) of the spring (30) is accommodated. The accommodation space (612) may extend through the second connector body (610) in the longitudinal direction.

[0163] The second connector body (610) may include one or more slots (614) extending outward from the inner surface (615) forming the receiving space (612). For example, a plurality of slots (614) may be arranged spaced apart from each other in the circumferential direction.

[0164] In the present embodiment, as a plurality of slots (614) are formed, the contact area between the inner surface (615) and the first extension portion (312) may be reduced. Accordingly, friction between the first extension portion (312) and the second connector (60) may be reduced during the process of the second connector (60) moving along the first extension portion (312).

[0165] The second connector body (610) may further include a guide slot extending radially from the receiving space (612). The guide slot may guide the first extension portion (312) into the receiving space (612) when the first extension portion (312) and the second connector (60) are coupled.

[0166] The above guide slot may include a first slot (616a). The first slot (616a) is an inlet slot for introducing the first extension (312). The first slot (616a) may be formed so as to be formed by a second coupling portion (623) to be described later or to pass through the second coupling portion (623).

[0167] The above guide slot may further include a second slot (616) that guides the first extension (616a) introduced through the first slot (616a) to the receiving space (612).

[0168] Meanwhile, the second connecting body (610) may include a first part (610a), a second part (610b) and a third part (610c) located on both sides of the first part (641a).

[0169] With reference to FIG. 8, the second part (610b) may be positioned above the first part (610a), and the third part (610b) may be positioned below the first part (610a).

[0170] The diameter of each of the second part (610b) and the third part (610c) may be larger than the diameter of the first part (610a).

[0171] The second connecting body (610) may include a first surface (613a) facing the second member (443) of the second connector coupling portion (440) and a second surface (613b) facing the third member (443) of the second connector coupling portion (440). Each of the first surface (613a) and the second surface (613b) may include a flat surface.

[0172] The second connector (60) may further include a first coupling portion (621) and a second coupling portion (623) for coupling with the second connector coupling portion (440).

[0173] The second connecting portion (623) may be positioned on the opposite side of the first connecting portion (621) in the second connecting body (610).

[0174] The first coupling portion (621) and the second coupling portion (623) may extend from the first portion (610a).

[0175] The first coupling part (621) can be inserted into the hole (445) of the second member (422), and the second coupling part (623) can be inserted into the hole (445) of the third member (423).

[0176] In order for the first coupling portion (621) to be easily inserted into the hole (445) of the second member (422), the first coupling portion (621) may include an inclined surface (622). In the process of coupling the second connector (60) with the second connector coupling portion (440), the inclined surface (622) may come into contact with the inclined surface (447) of the second member (442).

[0177] The second connecting portion (623) may be divided into a first part (624) and a second part (625). The first part (624) and the second part (625) may be spaced apart from each other. The first slot (616a) may be formed between the first part (624) and the second part (625).

[0178] In order for the second connecting portion (623) to be easily inserted into the hole (445) of the third member (423), the second connecting portion (623) may include an inclined surface (623a). For example, the inclined surface (623a) may be formed on the first part (624).

[0179] The second connecting portion (623) may be provided with inclined surfaces (624a, 624b) to facilitate the introduction of the first extension portion (312). For example, the first part (624) may be provided with a first inclined surface (624a), and the second part (625) may be provided with a second inclined surface (624b). By the inclined surfaces (624a, 624b), the entrance width of the first slot (616a) may be increased.

[0180] For example, the first inclined surface (624a) and the second inclined surface (624b) may be inclined so that the gap increases as they move away from the second slot (616).

[0181] The second connector (60) may further include a handle (630). A user may hold the handle (630) and connect the second connector (60) to the first extension (312).

[0182] At least one of the upper and lower sides of the second connector (60) may be provided with a recessed portion (611). The recessed portion (611) may reduce the weight of the second connector (60). The recessed portion (611) may allow other components to be combined.

[0183] For example, the recessed portion (611) may be provided in each of the first portion (610b) and the second portion (610c).

[0184] Fig. 9 (A) is a drawing showing an example of combining a second connector and a spring according to the first embodiment, and Fig. 9 (B) is a drawing showing a modified example of combining a second connector and a spring.

[0185] First, referring to (A) of FIGS. 8 and 9, in order to couple the first extension (312) and the second connector (60), the first extension (312) can be inserted into the guide slot and positioned into the receiving space (612).

[0186] The diameter of the first extension (312) may be larger than the width of the first slot (616a) and the width of the second slot (616).

[0187] Since the first slot (616a) is formed between the first part (624) and the second part (625), in the process of inserting the first extension part (312) into the first slot (616a) as indicated by arrow A1, the first part (624) and the second part (625) may move away from each other, thereby increasing the width of the first slot (616a).

[0188] Since the inclined surfaces (624a, 624b) are formed on each of the first part (624) and the second part (625), the first extension part (312) can be easily introduced into the first slot (616a).

[0189] When the first extension (312) introduced into the first slot (616a) is moved toward the second slot (616), the width of the second slot (616) also increases, so that the first extension (312) can move through the second slot (616) and into the receiving space (612).

[0190] When the first extension portion (312) is moved into the receiving space (612), the widths of the first part (624) and the second part (625) can return to their original widths. When the first extension portion (312) is received in the receiving space (612), the separation of the first extension portion (312) from the second connector (60) through the guide slot can be restricted.

[0191] As another example, referring to (B) of FIG. 9, it is also possible to directly insert the end of the first extension (312) into the receiving space (612) of the second connector (60).

[0192] For example, after aligning the end of the first extension (312) with the lower side of the receiving space (612) in the second connector (60), the end of the first extension (312) can be inserted into the receiving space (612) of the second connector (60). Then, when the second connector (60) is moved in the longitudinal direction of the first extension (312) as indicated by arrow A2, the coupling of the first extension (312) and the second connector (60) can be completed.

[0193] FIG. 10 (A) is a drawing showing the degree of freedom of the damping unit in a state where the damping unit according to the first embodiment is connected to the first joint by the first connector, and FIG. 10 (B) is a drawing showing the degree of freedom of the damping unit in a state where the damping unit according to the first embodiment is connected to the spring by the second connector.

[0194] Referring to FIGS. 5 to 10, the first connector (50) can be rotated around the pin (570) (see arrow A). Accordingly, the damping unit (40) connected to the first connector (50) can also be rotated around the pin (570). The pin (570) can provide a first rotation center.

[0195] The damping unit (40) can be rotated with respect to the first connector (50). For example, when the engaging protrusion (412) of the first connector engaging portion (411) is inserted into the engaging hole (516) of the first connector (50), the first connector engaging portion (411) can be rotated around the engaging protrusion (412). Accordingly, the damping unit (40) connected to the first connector (50) can be rotated around the engaging protrusion (512) (see arrow B). The engaging protrusion (412) can provide a second rotation center.

[0196] Accordingly, the first body (410) connected to the first connector (50) can have two degrees of freedom with respect to the tub (20).

[0197] The second connector (60) connected to the first extension (312) can be rotated around the first extension (312) (see arrow C). The first extension (312) can provide a center of rotation.

[0198] The damping unit (40) can be rotated with respect to the second connector (60). For example, when the coupling portion (621, 623) of the second connector (60) is coupled to the coupling hole (445) of the second connector coupling portion (440), the second connector coupling portion (440) can be rotated around the coupling portion (621, 623). Accordingly, the damping unit (40) connected to the second connector (60) can be rotated around the coupling portion (621, 623) (see arrow D). The coupling portion (621, 623) can provide a third rotation center.

[0199] The second connector (60) connected to the first extension (312) can also move in the longitudinal direction of the first extension (312) (see arrow E).

[0200] In addition, as described above, the damping unit (40) itself is configured to enable relative movement of the first body (410) and the second body (430).

[0201] According to this embodiment, the damping unit (40) has the advantage that the vibration of the tub (20) can be effectively reduced by the damping unit (40) due to the multidirectional degrees of freedom.

[0202] When the drum (25) within the above tub (20) rotates, vibration can be transmitted to the above tub (20).

[0203] When the drum (25) rotates at a low speed, vibration can be reduced by the damping force of the damping unit (40) itself. By reducing vibration, the tub (20) can be prevented from colliding with the side of the cabinet (10).

[0204] In addition, since the damping unit (40) is connected to the spring (30), the vibration transmitted to the cabinet (10) can be reduced.

[0205] When the drum (25) above rotates at high speed, vibration can be reduced by the multi-directional degrees of freedom provided by the damping unit (40) and connectors (50, 60), and the tub (20) can be restricted from colliding with the side of the cabinet (10).

[0206] In addition, since the damping unit (40) is connected to the spring (30), the vibration transmitted to the cabinet (10) can be reduced.

[0207] Fig. 11 is a drawing showing a state in which a damping unit according to the second embodiment is installed in a tub.

[0208] This embodiment is otherwise identical to the first embodiment, except that the coupling position and number of damping units in the tub can be adjusted. Therefore, only the characteristic parts of this embodiment will be described below.

[0209] Referring to Fig. 11, the tub (20) may include a coupling mechanism (20A) for coupling the damping unit (40). The coupling mechanism (20A) may be coupled to the tub (20) as a separate component from the tub (20), or may be formed integrally with the tub (20).

[0210] The above-described coupling mechanism (20A) may include a plurality of coupling portions (210A, 210B). The plurality of coupling portions (210A, 210B) may, for example, be arranged in a row. The shape of each coupling portion (210A, 210B) may be identical to or similar to the shape of the first coupling portion described in FIG. 4.

[0211] Referring to FIG. 4, the coupling mechanism (20A) may be coupled adjacent to the front end side of the tub (20). A plurality of coupling portions (210A, 210B) may be arranged, for example, in the front-rear direction (Y-axis direction) of the tub (20).

[0212] Depending on the type of the laundry treatment device (1), one side of a single damping unit (40) can be connected to the spring (30), and the other side can be connected to one of the plurality of connecting parts (210A, 210B).

[0213] Depending on the position at which the other side of the damping unit (40) is coupled, the vibration reduction characteristics of the damping unit (40) may vary.

[0214] Alternatively, as illustrated in Fig. 11, it is also possible to connect a plurality of damping units (40, 40A) to the tub (20). For example, it is also possible to connect one damping unit (40) to one of the plurality of coupling portions (210A, 210B), and to connect an additional damping unit (40) to another of the plurality of coupling portions (210A, 210B).

[0215] At this time, multiple damping units (40, 40A) can be connected to the spring (30), and the connection status can be referred to in FIG. 13, which will be described later.

[0216] As another example, it is also possible for the above-mentioned coupling mechanism to be coupled adjacent to the rear end of the above-mentioned tub (20). That is, it is also possible for a coupling mechanism having a plurality of second coupling portions as described in Fig. 4 to be coupled to the tub.

[0217] Additionally, it is also possible for a first coupling mechanism having a plurality of first coupling portions to be installed on the front side of the tub, and a second coupling mechanism having a plurality of second coupling portions to be installed on the rear side of the tub.

[0218] FIG. 12 is a plan view showing a state in which a first damping unit and a second damping unit according to a third embodiment are installed in a tub, and FIG. 13 is a drawing showing a state in which a first damping unit and a second damping unit are connected to a spring according to a third embodiment.

[0219] This embodiment is otherwise identical to the first or second embodiment, and is characterized by a plurality of damping units that reduce vibration of the tub. Hereinafter, only the characteristic parts of this embodiment will be described, and for the same configuration as the first embodiment, the drawing symbols and descriptions of the first embodiment will be used as they are.

[0220] Referring to FIGS. 12 and 13, a first damping unit (71) can be connected to a first connecting portion (210) of the tub (20), and a second damping unit (72) can be connected to a second connecting portion (230) of the tub (20).

[0221] The first damping unit (71) and the second damping unit (72) can be connected in the vertical direction to the first extension (312) of the spring (30).

[0222] For example, a second connector (60A) for the first damping unit (71) and a second connector (60B) for the second damping unit (72) can be vertically connected to the first extension (312).

[0223] Even in this case, a plurality of second connectors (60A, 60B) can move in the longitudinal direction of the first extension (312) or rotate around the first extension (312), and a plurality of damping units (71, 72) can reduce vibration without interference with each other.

[0224] FIG. 14 is a drawing showing a state in which a movement restriction part is connected to a second connector according to the fourth embodiment, (A) of FIG. 15 is a drawing showing a movement restriction part according to the fourth embodiment, and (B) of FIG. 15 is a cross-sectional view taken along line 15B-15B of FIG. 14.

[0225] This embodiment is otherwise identical to the previous embodiment, except that it additionally includes a movement limiter for restricting the unidirectional movement of the second connector. Therefore, only the characteristic parts of this embodiment will be described below, and the drawing symbols and descriptions of the first embodiment will be used for the same components as the first embodiment.

[0226] Referring to FIGS. 10, 14 and 15, the second connector (60) can move up and down along the first extension (312) (see arrow E).

[0227] Depending on the type of the laundry treatment device (1), it is necessary to restrict the second connector (60) from moving up and down along the second extension (312).

[0228] In the present embodiment, in order to limit the up and down movement of the second connector (60), a movement limiting member (81, 82) may be connected to the second connector (60).

[0229] The above movement restriction part (81, 82) may include a first restriction part (81) connected to the upper side of the second connector (60) and a second restriction part (82) connected to the upper side of the second connector (60).

[0230] In this embodiment, the shapes of the first restriction portion (81) and the second restriction portion (82) can correspond, so only the shape of the first restriction portion (81) will be described below.

[0231] The above first limiting portion (81) can be connected to the second connector (60) while being combined with the above first extension portion (312).

[0232] The above first limiting portion (81) may include a body (810) forming a receiving space (813). The first extension portion (312) may be received in the receiving space (813).

[0233] The above body (810) may include a first body (811) and a second body (812) extending from the first body (811). The outer diameter of the second body (812) may be smaller than the outer diameter of the first body (811).

[0234] The above second body (812) can be inserted into the recessed portion (611) of the above second connector body (610).

[0235] For example, the second body (812) of the first restriction portion (81) can be inserted into the recessed portion (611) from the upper side of the second connector body (610). The second body (822) of the second restriction portion (82) can be inserted into the recessed portion (611) from the lower side of the second connector body (610).

[0236] The first restriction portion (81) may be provided with a fastening hole (814) to which a bolt (not shown) is fastened so as to limit movement of the first restriction portion (81) with respect to the first extension portion (312). The fastening hole (814) may be provided, for example, in the first body (811). The bolt may penetrate the fastening hole (814) and be coupled to the first extension portion (312) or pressurize the first extension portion (312).

[0237] Since the above movement restriction part is detachably connected to the second connector (60), there is an advantage in that, if necessary, the movement restriction part can be additionally connected or the connected movement restriction part can be easily separated.

[0238] Alternatively, it is also possible to limit the upward or downward movement of the second connector (60) by using only one of the plurality of limiting parts.

[0239] Meanwhile, in the above embodiments, two or more damping units are connected to one spring as an example, but alternatively, it is also possible for the first damping unit to be connected to the first spring and the second damping unit to be connected to the second spring.

[0240] Alternatively, the first damping unit may be connected to one of the first and second extensions of the spring, and the second damping unit may be connected to the other of the first and second extensions of the spring.

Claims

1. Cabinet; A tub placed inside the above cabinet; A spring connecting the cabinet and the tub so that the tub is supported on the cabinet; and A laundry treatment device including a damping unit that reduces vibration by connecting the cabinet and the spring.

2. In paragraph 1, The above tub has a damping unit coupling portion for coupling the damping unit, A laundry treatment device including a spring coupling portion to which the above spring is coupled.

3. In paragraph 2, A laundry treatment device further comprising a first connector connecting the damping unit to the damping unit coupling portion.

4. In paragraph 3, The above damping unit coupling portion includes a first wall extending from the tub, and a second wall and a third wall extending from the first wall, The second and third walls are spaced apart from each other to form a space, A laundry treatment device wherein the first connector is connected to the second wall and the third wall between the second wall and the third wall.

5. In paragraph 3, The first connector is connected to the damping unit coupling portion so as to be rotatable about the first rotation center, A laundry treatment device wherein the damping unit is connected to the first connector so as to be rotatable about a second rotation center.

6. In paragraph 3, The above damping unit, A first body connected to the first connector, A laundry treatment device comprising a second body movably connected to the first body and connected to the spring.

7. In paragraph 6, The first connector has a first part connected to the damping unit coupling portion, comprising a second portion and a third portion extending from the first portion and spaced apart from each other; A laundry treatment device, wherein the first body includes a first connector coupling portion rotatably coupled to the second portion and the third portion.

8. In paragraph 2, A laundry treatment device further comprising a second connector for connecting the damping unit to the spring.

9. In paragraph 8, A laundry treatment device wherein the damping unit is connected to the second connector so as to be rotatable about a third rotation center.

10. In paragraph 8, The above spring, A winding section in which a wire-shaped wire material is wound multiple times, A first extension portion extending from one side of the above-mentioned winding portion and coupled to the above-mentioned cabinet; A second extension portion extending from the other side of the above-mentioned winding portion and coupled to the spring coupling portion of the above-mentioned tub is included. A laundry treatment device wherein the second connector is connected to one of the first extension and the second extension.

11. In paragraph 10, A laundry treatment device wherein the second connector is rotatably connected to the one extension and is movable in the longitudinal direction of the one extension while connected to the one extension.

12. In paragraph 10, The second connector is rotatably connected to the extension part, A laundry treatment device further comprising a movement limiting member connected to the first extension and the second connector to limit movement of the first extension of the second connector in the longitudinal direction.

13. In paragraph 10, A laundry treatment device, wherein the second connector includes a connector body that forms a receiving space in which the one extension portion is received.

14. In paragraph 13, A laundry treatment device wherein the second connector further includes a guide slot for guiding the one extension portion into the receiving space.

15. In paragraph 13, The damping unit includes a first body connected to the damping unit coupling portion, and a second body movably connected to the first body and connected to the spring. A laundry treatment device, wherein the second body includes a second connector coupling portion for coupling with the second connector.

16. In paragraph 15, The second connector includes a first coupling portion and a second coupling portion extending from the connector body, A laundry treatment device in which the second connector joint is rotatably connected to the first joint and the second joint.

17. In paragraph 1, The above tub includes a coupling mechanism having a plurality of coupling portions, A laundry treatment device in which the above damping unit is coupled to one of the plurality of coupling parts.

18. In paragraph 1, The above tub includes a coupling mechanism having a plurality of coupling portions, The above damping unit comprises a first damping unit coupled to one of the plurality of coupling portions and the spring; A laundry treatment device comprising a second damping unit coupled to another coupling unit among the plurality of coupling units.

19. In paragraph 1 The tub includes a first coupling portion and a second coupling portion spaced apart from the first coupling portion in the front-rear direction, A laundry treatment device, wherein the damping unit comprises a first damping unit connected to the first coupling portion and the spring, and a second damping unit connected to the second coupling portion and the spring.

20. In paragraph 1, A laundry treatment device further comprising a lower damping unit connecting the base of the cabinet and the lower side of the tub.

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