Drum type washing machine

Abstract

To suppress deterioration in agitation performance of clothing in a drum type washing machine including a door having a central recess part.SOLUTION: A drum type washing machine 100 includes a door 5 which has an outside door member 5b and an inside door member 5a. The inside door member 5a includes an outer flange part 5a1, an inclined cylinder part 5a2, and a central recess part 5a4. On a cross section where the inside door member 5a is cut in the vertical direction so as to pass a center 5o of the door 5, a center recess part 5o includes an inclined surface which descends toward a deepest part 5a4a from a tip part 5a3 of the inclined cylinder part 5a2. The deepest part 5a4a of the central recess part 5a4 is arranged at a position deviated upward than a center line 5x of the door 5.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a drum-type washing machine for washing clothes. [Background technology]

[0002] The abstract of Patent Document 1 describes a drum-type washing machine having an outer tub placed within an outer frame housing for storing wash water, a rotary drum rotatably placed inside the outer tub for storing laundry, and a door that can be opened and closed on the front of the outer frame housing. The door has an inner door member made of heat-resistant glass facing the laundry entrance / exit of the rotary drum. The inner door member has a ring-shaped outer flange, a tapered cylindrical portion that protrudes from the inner peripheral edge of the outer flange toward the laundry entrance, and a central recess that protrudes from the tip of the tapered cylindrical portion into the tapered cylindrical portion toward the outer flange. The outer surface of the innermost recess is approximately flush with the outer surface of the outer flange. Furthermore, paragraph 0067 and Figure 5 of Patent Document 1 describe a configuration in which a raised portion is provided in the inner door member, where the central portion of the inner door member's central recess is raised toward the tip of the tapered cylindrical portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-93245 Summary of the Invention [Problem to be solved by the invention]

[0004] In Figure 5 of Patent Document 1, a central recess and a raised portion are provided in the internal door element, and a ring-shaped rear portion (portion indicated by reference numeral 86 in Patent Document 1) is formed at the boundary between the central recess and the raised portion, and it can be seen from Figure 5 that the ring-shaped surface formed by the rear portion (outer ring-shaped surface of the central recess) and the ring-shaped surface formed by the outer flange portion (annular surface of the outer flange portion) are parallel to each other.

[0005] If the outer annular surface of the central recess and the annular surface of the outer flange are parallel, clothes tend to accumulate inside the central recess during the washing operation (drum rotation), and the clothes are not properly agitated inside the rotating drum, which limits the improvement of washing performance.In drum-type washing machines with a drying function, the clothes are not properly agitated inside the rotating drum, which limits the improvement of drying performance.

[0006] An object of the present invention is to prevent a decrease in the agitation performance of clothes in a drum-type washing machine equipped with a door having a central recess. [Means for solving the problem]

[0007] In order to achieve the above object, the drum type washing machine of the present invention comprises: The washing machine comprises a housing, an outer tub provided inside the housing, a rotary drum rotatably disposed inside the outer tub for storing laundry, and a door provided on a front surface of the housing so as to be able to be opened and closed, In a drum-type washing machine, the door has an outer door member provided on the outside of the housing and an inner door member facing an entrance for laundry in the rotary drum, The inner door member has an annular outer flange provided on an outer periphery thereof, an inclined cylindrical portion protruding from an inner circumferential end of the outer flange toward the entrance while decreasing in diameter, and a central recessed portion recessed from a tip end of the inclined cylindrical portion toward the outside of the drum-type washing machine while decreasing in diameter, On a cross section of the inner door member cut in the vertical direction through the center of the door, the central recess has an inclined surface that descends from the tip end of the inclined cylindrical portion toward the deepest portion, The deepest part of the central recess is positioned above the center of the door.

[0008] In order to achieve the above object, the drum type washing machine of the present invention comprises: The washing machine comprises a housing, an outer tub provided inside the housing, a rotary drum rotatably disposed inside the outer tub for storing laundry, and a door provided on a front surface of the housing so as to be able to be opened and closed, In a drum-type washing machine, the door has an outer door member provided on the outside of the housing and an inner door member facing an entrance for laundry in the rotary drum, The internal door member has an annular outer flange provided on an outer periphery, an inclined cylindrical portion protruding from an inner circumferential end of the outer flange toward the entrance while decreasing in diameter, a central recessed portion recessed from a tip end of the inclined cylindrical portion toward the outside of the drum-type washing machine while decreasing in diameter, a raised portion protruding from a central portion of the central recessed portion in a direction opposite to the direction in which the central recessed portion is recessed, and a top portion formed in an annular shape on a front surface of the internal door member at a boundary between the central recessed portion and the raised portion, On a cross section of the inner door member cut in the vertical direction through the center of the door, The line connecting the lowest and highest points of the apex is configured to form a predetermined angle with the line connecting the lowest and highest points of the outer flange so that the spacing increases from top to bottom. [Effects of the Invention]

[0009] According to the present invention, in a drum-type washing machine equipped with a door having a central recess, it is possible to suppress a decrease in the performance of agitating clothes. Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiments. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing the appearance of a drum-type washing machine 100 according to an embodiment of the present invention. [Figure 2] 2 is a central cross-sectional view of the drum-type washing machine 100 shown in FIG. [Figure 3] 1 is a central cross-sectional view of an outer tub 2 and a rotary drum 3 according to an embodiment of the present invention. [Figure 4] FIG. 2 is a perspective view of an internal door member 5a according to the first embodiment of the present invention. [Figure 5] FIG. 5 is a VV cross-sectional view of the inner door member 5a shown in FIG. [Figure 6] FIG. 10 is a perspective view of an internal door member 5a according to a second embodiment of the present invention. [Figure 7] 7 is a cross-sectional view of the inner door member 5a taken along the line VII-VII in FIG. 6. FIG. [Figure 8] 8 is an enlarged view of a portion VIII of the inner door member 5a shown in FIG. 7. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, the drum type washing machine 100 will be described in a form having a drying function. A drum type washing machine having a drying function is sometimes called a "drum type washer-dryer," but in this embodiment, one having a drying function is also called a "drum type washing machine." The drum type washing machine embodying the present invention is not limited to a drum type washing machine having a drying function, and may be a drum type washing machine without a drying function.

[0012] The configuration of a drum type washing machine 100 will be outlined with reference to Fig. 1 to Fig. 3. Fig. 1 is a perspective view showing the appearance of a drum type washing machine 100 according to an embodiment of the present invention. Fig. 2 is a central cross-sectional view of the drum type washing machine 100 shown in Fig. 1. Fig. 3 is a central cross-sectional view of an outer tub 2 and a rotating drum 3 according to an embodiment of the present invention. The front-to-rear direction (depth direction), left-to-right direction (width direction), and up-to-down direction (height direction) are defined as shown in Figures 1 and 2. The left-to-right direction is defined so that the right side is the "right" and the left side is the "left" when viewing the drum type washing machine 100 from the front.

[0013] As shown in FIG. 1, the drum-type washing machine 100 has a frame formed by combining side panels 1b, made primarily of steel plates and resin molded parts, with reinforcing materials (not shown) on top of a base 1a, and a front cover 1c and a top cover 1d attached to the frame to form a housing 1. The front cover 1c is provided with a door 5 for loading and unloading laundry. A power switch, buttons for selecting operation programs, and a display 1f are provided at the front upper part of the top cover 1d. The top cover 1d also has lids 1g for storage compartments for the detergent box and fabric softener box.

[0014] When the door 5 is closed, its shape (outline) is circular when viewed from the front of the drum-type washing machine 100, and 5o in Fig. 1 indicates the center of the door 5. Also, 5x in Fig. 1 indicates a center line that passes through the center 5o of the door 5 and is perpendicular to the outer surface (surface) of the door 5.

[0015] As shown in FIG. 2, an outer tub 2 is provided inside a housing 1. The outer tub 2 is supported from below by multiple suspensions (not shown), and its upper portion is suspended by springs (not shown). A door 5 is opened and laundry WA, such as clothes, is placed into a rotating drum (inner tub) 3 located inside the outer tub 2. A fluid balancer 3a is provided on the outer periphery of the opening of the rotating drum 3 to reduce vibration caused by imbalance of the laundry WA during spin-drying. A plurality of lifters 3b are provided on the inner circumferential surface of the rotating drum 3 to lift up the laundry WA. The rotating drum 3 is directly connected to a motor (drive unit) 4 for driving the drum via a main shaft 3d connected to a metal flange 3c for the rotating drum.

[0016] A tub cover 2a is provided in front of the outer tub 2, and a rubber bellows 2b made of an elastic material is attached to the opening of the tub cover 2a. The bellows 2b serves to maintain watertightness while absorbing relative displacement between the outer tub 2 and the door 5. This prevents water leakage during washing, rinsing, and spin drying. The rotating drum 3 has numerous small holes (not shown) on its side and back for centrifugal spin-drying and ventilation. A water receiving section 2c is also provided at the bottom of the outer tub 2. A drainage device 8, including a drainage path, is provided below the outer tub 2 to drain wash water supplied to the outer tub 2 and water spun from laundry during the spin-drying operation. The drainage device 8 also functions to drain water dehumidified from drying air by the heat pump unit 10, which will be described later.

[0017] A water supply unit (water supply section) 20 is provided on the top of the housing 1. A water supply hose from a water faucet is connected to a water supply port 20a of the water supply unit 20. The water supply unit 20 has a solenoid valve that controls the water supply. The water supply unit 20 may also have a function of drawing up bathwater.

[0018] The drum-type washing machine 100 of this embodiment includes a blower 7 and a heat pump unit 10 as a drying device for drying laundry. Drying air is circulated between the outer tub 2, the rotary drum 3, and the heat pump unit 10. The heat pump unit 10 dehumidifies and heats the drying air. The drying air dehumidified and heated by the heat pump unit 10 is sent to the outer tub 2 and the rotary drum 3 by the blower 7 through a circulation air duct 6. The drying air that has contributed to drying the laundry inside the rotary drum 3 is returned to the heat pump unit 10 by the blower 7 through a circulation air duct (not shown). In this embodiment, the heat pump unit 10 and the blower 7 are integrated and disposed at the bottom of the housing 1. Although the heat pump unit 10 is used as a means for dehumidifying and heating the drying air in this embodiment, dehumidification and heating may also be performed by, for example, a water-cooled dehumidifier and a heater.

[0019] 3, a door 5 is provided at the opening of the outer tub 2. The door 5 has an inner door member 5a made of heat-resistant glass facing the laundry entrance / exit of the rotating drum 3, and an outer door member 5b made of a synthetic resin molded product exposed at the front of the drum-type washing machine 100.

[0020] The configuration of the drum type washing machine 100 described above is one example for applying the invention of the door 5 described below, and various modifications can be made within the scope in which the invention of the door 5 is applicable.

[0021] [Example 1] A first embodiment of the door 5 will be described with reference to Figures 4 and 5. Figure 4 is a perspective view of an internal door element 5a according to the first embodiment of the present invention. Figure 5 is a VV cross-sectional view of the internal door element 5a shown in Figure 4. Figure 5 shows a cross-section of the internal door element 5a when the door 5 is cut in the up-down direction (height direction) so as to pass through the center 5o of the door 5 (see Figure 1).

[0022] As shown in Figures 4 and 5, the internal door member 5a has an annular outer flange portion 5a1 provided on the outer periphery, an inclined cylindrical portion 5a2 that protrudes from the inner peripheral end (inner peripheral edge) of the outer flange portion 5a1 so as to reduce in diameter toward the inside of the outer tub 2 and the rotating drum 3, and a central recess 5a4 that recesses from the tip 5a3 of the inclined cylindrical portion 5a2 while reducing in diameter toward the outside (front side) of the drum-type washing machine 100.

[0023] Here, the first direction D1 and the second direction D2 of the inclined tube portion 5a2 are defined as shown in FIG. 5. FIG. 5 shows a state in which the internal door member 5a is placed vertically (a state in which the outer end surface 5a1a of the outer flange portion 5a1 is vertical). The first direction D1 coincides with the height direction of the inclined tube portion 5a2 and is a direction parallel to the center line 5x of the door 5 in the cross-sectional view of FIG. 5. That is, the height direction H is a direction included in a plane including the center line 5x and parallel to the center line 5x. The second direction D2 is a direction perpendicular to the center line 5x of the door 5 and parallel to the outer end surface 5a1a of the outer flange portion 5a1 in the cross-sectional view of FIG. 5. The outer end surface 5a1a of the outer flange portion 5a1 is the end surface of the outer flange portion 5a1 facing outward (frontward) of the drum-type washing machine 100.

[0024] The central recess 5a4 of the inner door member 5a accommodates laundry, which contributes to increasing the internal volume of the rotating drum 3. This allows for an increase in laundry capacity. In addition, the drying capacity can be increased, reducing uneven drying and wrinkles for the same laundry weight. This allows for an increase in the internal volume of the rotating drum 3 without increasing the external size of the housing 1.

[0025] Depending on the angle of the inclined surface of central recess 5a4, laundry (clothes) may easily accumulate inside central recess 5a4 during the washing operation (drum rotation), and the laundry may not be properly agitated inside rotating drum 3, limiting the improvement of washing performance. Also, during the drying operation, the laundry may not be properly agitated inside rotating drum 3, limiting the improvement of drying performance.

[0026] As shown in Fig. 4, the tip 5a3 of the inclined cylindrical portion 5a2 is annular. Then, as shown in Fig. 5, the central recess 5a4 has a deepest part 5a4a, and an inclined surface is formed that descends from the annular tip 5a3 of the inclined cylindrical portion 5a2 toward the deepest part 5a4a.

[0027] As shown in Fig. 5, in the internal door element 5a of this embodiment, the deepest part 5a4a of the central recess 5a4 is located closer to the uppermost part 5a1c of the outer flange 5a1 than the center line 5x of the door 5. In other words, the deepest part 5a4a of the central recess 5a4 is located at a position shifted upward from the center line 5x (center 5o) of the door 5. Here, the deepest part 5a4a is the part that is lowest when the internal door element 5a is placed horizontally, and is the part where the distance L5a4a between the deepest part 5a4a and the outer end surface 5a1a of the outer flange 5a1 is smallest in the cross-sectional view of Fig. 5.

[0028] 5, the distance between the deepest portion 5a4a of the central recess 5a4 and the uppermost portion 5a1c of the outer flange 5a1 is L2, and the distance between the deepest portion 5a4a of the central recess 5a4 and the lowermost portion 5a1d of the outer flange 5a1 is L1. The distance L1 is greater than the distance L2 (L1 > L2). Here, the distances L1 and L2 are distances in the second direction D2 (radial distances), and the distance in the first direction D1 is not taken into consideration. That is, the deepest portion 5a4a of the central recess 5a4 is located radially inward (downward) from the uppermost portion 5a1c of the outer flange 5a1 by the distance L2, and is located radially inward (upward) from the lowermost portion 5a1d of the outer flange 5a1 by the distance L1.

[0029] The inclined surface of the central recess 5a4 is curved, but not spherical, with a single radius. In this case, by making the distance L1 larger than the distance L2, it becomes easier to form the inclined surface 5a4d of the central recess 5a4 rising upward from the deepest portion 5a4a to a more vertical state on the cross section of FIG. 5. This prevents laundry (clothes) from accumulating on the inclined surface 5a4d, and makes it easier for the laundry to be agitated inside the rotating drum 3.

[0030] In this embodiment, the tip 5a3 of the inclined tube portion 5a2 has a height H5a3c in the first direction D1, which is the uppermost portion 5a3c located at the top-to-bottom position of the drum type washing machine 100. The bottom portion 5a3d located at the bottom-to-bottom position of the drum type washing machine 100 has a height H5a3d in the first direction D1. The height of the tip 5a3 of the annular inclined tube portion 5a2 in the first direction D1 varies along the circumferential direction, with the top portion 5a3c being the lowest and the bottom portion 5a3d being the highest. That is, the height H5a3d at the bottom portion 5a3d of the tip 5a3 of the inclined tube portion 5a2 is greater than the height H5a3c at the top portion 5a3c. This, together with the fact that deepest portion 5a4a of central recess 5a4 is located closer to uppermost portion 5a1c of outer flange 5a1 than center line 5x of door 5, makes it easier to agitate laundry within rotation drum 3.

[0031] Furthermore, due to the above-described configuration, the length of inclined surface 5a4d is longer than the length of inclined surface 5a4c on the cross section of Fig. 5. Inclined surface 5a4d is an inclined surface formed between the lowermost portion 5a3d of tip 5a3 of inclined cylindrical portion 5a2 and the deepest portion 5a4a of central recess 5a4. Inclined surface 5a4c is an inclined surface formed between the uppermost portion 5a3c of tip 5a3 of inclined cylindrical portion 5a2 and the deepest portion 5a4a of central recess 5a4.

[0032] [Example 2] A second embodiment of the door 5 will be described with reference to Figures 6 to 8. Figure 6 is a perspective view of an internal door element 5a according to the second embodiment of the present invention. Figure 7 is a cross-sectional view of the internal door element 5a taken along line VII-VII of Figure 6. Figure 8 is an enlarged view of part VIII of the internal door element 5a shown in Figure 7. In this embodiment, the shape of the inner door member 5a is partially changed from that of embodiment 1. The following will mainly explain the differences from embodiment 1.

[0033] As shown in FIGS. 6 and 7, the internal door member 5a of this embodiment has a raised portion 5a5 in the central recess 5a4. The raised portion 5a5 rises in the opposite direction to the recessed direction of the central recess 5a4. By providing the raised portion 5a5, an annular apex 5a6 is formed on the surface (front surface) of the internal door member 5a facing the front side of the drum type washing machine 100. The apex 5a6 is formed at the boundary between the descending surface portion 5a4e of the central recess 5a4 and the raised portion 5a5. In other words, the apex 5a6 is formed along the circumferential direction at the connection between the inner peripheral end (inner peripheral edge) of the descending surface portion 5a4e that descends toward the center of the central recess 5a4 and the outer peripheral end (outer peripheral edge) of the raised portion 5a5.

[0034] Of top portion 5a6, uppermost portion 5a6c, which is located highest in the vertical direction of drum type washing machine 100, has a distance L5a6c from outer end surface 5a1a of outer flange portion 5a1 on the cross section of Fig. 7. Furthermore, lowermost portion 5a6d, which is located lowest in the vertical direction of drum type washing machine 100, has a distance L5a6d from outer end surface 5a1a of outer flange portion 5a1 on the cross section of Fig. 7. Distance L5a6d at lowermost portion 5a6d of top portion 5a6 is larger than distance L5a6c at uppermost portion 5a6c of top portion 5a6 (L5a6d>L5a6c).

[0035] In this embodiment, because the distance L5a6c is greater than the distance L5a6c, the annular apex 5a6 is not parallel to the outer end surface 5a1a of the outer flange 5a1 on the cross section of Fig. 7, but has an inclination angle θ. In other words, on the cross section of Fig. 7, the line segment (coincident with 5a6) connecting the uppermost portion 5a6c and the lowermost portion 5a6d of the apex 5a6 has an inclination angle θ1 with respect to the line segment (coincident with 5a1a) connecting the uppermost portion 5a1c and the lowermost portion 5a1d of the outer flange 5a1. In this case, the inclination angle θ1 is the angle θ at which the distance between the line segment (coincident with 5a6) and the line segment (coincident with 5a1a) increases from top to bottom.

[0036] The effect of the tilt angle θ will be described with reference to FIG. To smoothly connect the curved surface of the descending surface portion 5a4e of the central recess 5a4 and the curved surface of the raised portion 5a5, a curved line that is convex to the left and a curved line that is convex to the right in FIG. 8 are connected at point 5a7. The curved line that is convex to the left represents the curved surface of the descending surface portion 5a4e and its extension, and is hereinafter referred to as "curve 5a4e." The curved line that is convex to the right represents the curved surface of the raised portion 5a5, and is hereinafter referred to as "curve 5a5." Point 5a7 is actually a line.

[0037] Straight line 5a8 is a tangent drawn at point 5a7 that touches curves 5a4e and 5a5. Compared to (a) where the inclination angle θ is not provided, (b) where the inclination angle θ is provided, the angle θ2 of tangent line 5a8 with respect to the up-down direction (vertical direction) becomes smaller, and the tangent line 5a8 follows the up-down direction (vertical direction). In this case, depth D5a4e of the recess formed by curve 5a4e becomes shallower. This prevents laundry (clothes) from easily accumulating on inclined surface 5a4d, and makes it easier for laundry to be agitated inside rotating drum 3.

[0038] The above-described drum type washing machine 100 has the following features. The washing machine comprises a housing 1, an outer tub 2 provided inside the housing 1, a rotary drum 3 rotatably disposed inside the outer tub 2 for storing laundry, and a door 5 provided on the front surface of the housing 1 so as to be able to be opened and closed freely, In the drum type washing machine 100, the door 5 has an outer door member 5b provided on the outside of the housing 1 and an inner door member 5a facing the entrance and exit of the laundry in the rotary drum 3. The inner door member 5a has an annular outer flange portion 5a1 provided on the outer periphery, an inclined cylindrical portion 5a2 that protrudes from the inner circumferential end of the outer flange portion 5a1 toward the entrance / exit of the rotary drum 3 while decreasing in diameter, and a central recessed portion 5a4 that recesses from a tip end portion 5a3 of the inclined cylindrical portion 5a2 toward the outside of the drum-type washing machine 100 while decreasing in diameter, On a cross section (FIG. 5) of the inner door member 5a cut in the vertical direction through the center 5o of the door 5, The central recess 5o has an inclined surface that descends from the tip end 5a3 of the inclined cylindrical portion 5a2 toward the deepest portion 5a4a, The deepest part 5a4a of the central recess 5a4 is disposed at a position shifted upward from the center 5o of the door 5.

[0039] (2) On a cross section (FIG. 5) of the inner door member 5a cut in the vertical direction through the center 5o of the door 5, The height H5a3d of the lowermost portion 5a3d of the tip end 5a3 of the inclined tube portion 5a2 measured in the protruding direction of the inclined tube portion 5a2 from the outer flange portion 5a1 is greater than the height H5a3c of the uppermost portion 5a3c of the tip end 5a3.

[0040] (3) The tip end portion 5a3 of the inclined cylindrical portion 5a2 is annular. The height H5a3d of the lowermost portion 5a3d of the tip portion 5a3 of the inclined cylindrical portion 5a2 is the highest in the annular tip portion 5a3, The height H5a3c of the uppermost portion 5a3c of the tip portion 5a3 of the inclined cylindrical portion 5a2 is the lowest among the annular tip portion 5a3.

[0041] (4) On a cross section (FIG. 5) of the inner door member 5a cut vertically through the center 5o of the door 5, The radial distance L1 between the lowermost portion 5a1d of the outer flange portion 5a1 and the deepest portion 5a4a of the central recess 5a4 is greater than the radial distance L2 between the uppermost portion 5a1c of the outer flange portion 5a1 and the deepest portion 5a4a of the central recess 5a4.

[0042] (5) A washing machine comprising: a housing 1; an outer tub 2 provided inside the housing 1; a rotary drum 3 rotatably arranged inside the outer tub 2 and storing laundry; and a door 5 provided on the front surface of the housing 1 so as to be able to be opened and closed; In the drum type washing machine 100, the door 5 has an outer door member 5b provided on the outside of the housing 1 and an inner door member 5a facing the entrance and exit of the laundry in the rotary drum 3. The internal door member 5a has an annular outer flange 5a1 provided on the outer periphery, an inclined cylindrical portion 5a2 that protrudes from the inner peripheral end of the outer flange 5a1 toward the entrance / exit of the rotary drum 3 while decreasing in diameter, a central recess 5a4 that is recessed from a tip end 5a3 of the inclined cylindrical portion 5a2 toward the outside of the drum-type washing machine 100 while decreasing in diameter, a raised portion 5a5 that raises a central portion of the central recess 5a4 in a direction opposite to the recessed direction of the central recess 5a4, and a top portion 5a6 that is formed in an annular shape on the front surface of the internal door member 5a at the boundary between the central recess 5a4 and the raised portion 5a5, On a cross section (FIG. 7) of the inner door member 5a cut in the vertical direction through the center 5o of the door 5, The line connecting the lowest part 5a6d and the highest part 5a6c of the top part 5a6 (coincident with 5a6) is configured to form a predetermined angle θ1 with the line connecting the lowest part 5a1d and the highest part 5a1c of the outer flange part 5a1 (coincident with 5a1a) so that the spacing increases from top to bottom.

[0043] The present invention is not limited to the above-described embodiments and includes various modifications. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and are not necessarily limited to those including all of the configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace part of the configuration of each embodiment with other configurations. [Explanation of symbols]

[0044] 1...housing, 2...outer tub, 3...rotating drum, 5...door, 5a...internal door member, 5a1...outer flange, 5a1c...top of outer flange 5a1, 5a1d...bottom of outer flange 5a1, 5a2...inclined cylinder, 5a3...tip of inclined cylinder 5a2, 5a3d...bottom of tip 5a3 of inclined cylinder 5a2, 5a4...central recess, 5a4a...deepest part of central recess 5a4, 5a5...raised portion, 5a6...top, 5a6c...top of top 5a6, 5a6d...top 5a 6, 5b...external door member, 5o...center of door 5, 100...drum type washing machine, H5a3c...height of the top 5a3c of the tip 5a3 of the inclined cylindrical portion 5a2, H5a3d...height of the bottom 5a3d of the tip 5a3 of the inclined cylindrical portion 5a2, L1...radial distance between the bottom 5a1d of the outer flange portion 5a1 and the deepest part 5a4a of the central recess 5a4, L2...radial distance between the top 5a1c of the outer flange portion 5a1 and the deepest part 5a4a of the central recess 5a4.

Claims

1. The washing machine comprises a housing, an outer tub provided inside the housing, a rotary drum rotatably disposed inside the outer tub for storing laundry, and a door provided on a front surface of the housing so as to be able to be opened and closed, In a drum-type washing machine, the door has an outer door member provided on the outside of the housing and an inner door member facing an entrance for laundry in the rotary drum, The inner door member has an annular outer flange provided on an outer periphery thereof, an inclined cylindrical portion protruding from an inner circumferential end of the outer flange toward the entrance while decreasing in diameter, and a central recessed portion recessed from a tip end of the inclined cylindrical portion toward the outside of the drum-type washing machine while decreasing in diameter, On a cross section of the inner door member cut in the vertical direction through the center of the door, the central recess has an inclined surface that descends from the tip end of the inclined cylindrical portion toward the deepest portion, The drum-type washing machine, wherein the deepest part of the central recess is disposed at a position shifted upward from the center of the door.

2. The drum type washing machine according to claim 1, On a cross section of the inner door member cut in the vertical direction through the center of the door, A drum-type washing machine characterized in that the height of the lowest part of the tip of the inclined tube part, measured from the outer flange part in the protruding direction of the inclined tube part, is higher than the height of the top part of the tip.

3. The drum type washing machine according to claim 2, The tip end of the inclined cylindrical portion is annular, the height of the lowest part of the tip of the inclined cylindrical part is the highest among the tip parts forming the annulus, A drum-type washing machine, characterized in that the height of the uppermost part of the tip of the inclined cylindrical part is the lowest among the tip parts forming the ring.

4. The drum type washing machine according to claim 1, On a cross section of the inner door member cut in the vertical direction through the center of the door, A drum-type washing machine characterized in that the radial distance between the bottom of the outer flange portion and the deepest part of the central recess is larger than the radial distance between the top of the outer flange portion and the deepest part of the central recess.

5. The washing machine comprises a housing, an outer tub provided inside the housing, a rotary drum rotatably disposed inside the outer tub for storing laundry, and a door provided on a front surface of the housing so as to be able to be opened and closed, In a drum-type washing machine, the door has an outer door member provided on the outside of the housing and an inner door member facing an entrance for laundry in the rotary drum, The internal door member has an annular outer flange provided on an outer periphery, an inclined cylindrical portion protruding from an inner circumferential end of the outer flange toward the entrance while decreasing in diameter, a central recessed portion recessed from a tip end of the inclined cylindrical portion toward the outside of the drum-type washing machine while decreasing in diameter, a raised portion protruding from a central portion of the central recessed portion in a direction opposite to the direction in which the central recessed portion is recessed, and a top portion formed in an annular shape on a front surface of the internal door member at a boundary between the central recessed portion and the raised portion, On a cross section of the inner door member cut in the vertical direction through the center of the door, The washing machine is characterized in that the line connecting the lowest and highest points of the top part is configured to form a predetermined angle with the line connecting the lowest and highest points of the outer flange part so that the interval increases from top to bottom.

Images