WO2023125437A1

WO2023125437A1 - Filtering apparatus and washing machine

Info

Publication number: WO2023125437A1
Application number: PCT/CN2022/142010
Authority: WO
Inventors: 中村哲; 吉田由佳
Original assignee: 青岛海尔洗衣机有限公司; Aqua株式会社; 海尔智家股份有限公司
Priority date: 2021-12-27
Filing date: 2022-12-26
Publication date: 2023-07-06
Also published as: JP2023096748A

Abstract

Provided in the present invention are a filtering apparatus capable of improving maintainability and a washing machine comprising the filtering apparatus. The filtering device (10) comprises: an inner side cover (21) mounted on a washing drum; a surface side cover (22) exposed to the inside of the washing drum in a state covering the inner side cover (21); a connecting shaft (23) connecting the inner side cover (21) and the surface side cover (22); and a scraping part (34). The filter apparatus (10), in a capture area (22M) of the surface side cover (22) captures foreign matter contained in water flowing into the space between the surface side cover (22) and the inner side cover (21) in the washing drum and flowing out of a filter hole (22A) in the surface side cover (22). The inner side cover (21) is provided with a stop area (21E) for stopping the foreign matter from leaving from the capture area (22M). The inner side cover (21) can rotate relative to the surface side cover (22) about the connecting shaft (23). Relative rotation between the scraping part (34) and the inner side cover (21) scrapes the foreign matter (F) from the stop area (21E) in linked manner.

Description

Filtration device and washing machine

technical field

The present invention relates to a filter device and a washing machine comprising the filter device.

Background technique

The washing machine described in the following Patent Document 1 includes: a water tub; a washing and dehydrating tub disposed in the water tub; a water channel provided on the side of the washing and dehydrating tub to circulate the washing water during the washing process and the rinsing process of the washing operation; and The filter unit is installed in the waterway and collects lint from the washing water. The filter unit includes: a front cover provided with a filter member for collecting lint and allowing washing water to pass through; and a rear cover detachably attached to the front cover from the rear side. The lint collected by the filter member is stripped from the filter member by the centrifugal force generated by the rotation of the washing and spin-drying tub during the spin-drying process of the washing operation, and pushed toward the rear cover.

After the washing operation, the user detaches the filter unit from the water circuit and separates it into a front cover and a rear cover, and then presses and slides an end of the front cover to the rear cover to maintain the filter unit. Thereby, the thread scraps which adhered to the rear cover are peeled off by the scraping part provided in the edge part of a front cover. Then, when the user completes the filter unit by combining the front cover and the rear cover and attaches it to the waterway, the maintenance of the filter unit is completed.

In the case of the filter unit described in Patent Document 1, the user can perform maintenance without touching lint. However, in addition to the work of detaching the filter unit to the waterway, the user also needs to perform the first work of separating the filter unit into the front cover and the rear cover, pressing and sliding the scraper part of the front cover to the rear cover. The second job of the and the third job of combining the front cover and the rear cover as they are for maintenance. In addition, if the direction of the scraping portion is wrong, it will not be possible to cleanly peel off the lint sticking to the rear cover. Therefore, the user needs to be careful when sliding the scraping portion of the front cover. In this way, there is room for improvement in maintainability of the filter unit.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2021-164537

Contents of the invention

The problem to be solved by the invention

The present invention was made under such a background, and an object of the present invention is to provide a filter device capable of improving maintainability, and a washing machine including the filter device.

The present invention is a filtering device, which is installed in the washing tub of a washing machine, wherein the filtering device includes: an inner side cover, assembled on the inner periphery of the washing tub; an outer side cover, to cover the The surface side cover is provided with a capture area opposite to the inside cover and a plurality of filter holes distributed in the capture area; and a connecting shaft is connected to the inside cover and the front side cover, the filter device captures foreign matter contained in the water in the washing tub that flows between the front side cover and the back side cover and flows out from the filter hole in the capture area , wherein, the inside cover is provided with a stop area for stopping the foreign objects leaving from the capture area, and the inside cover can be positioned relative to the watch around the connecting shaft between the completion position and the maintenance position. The side cover is relatively rotated, the completion position is to complete the position of the filter device by making the stopper area oppose the capture area, and the maintenance position is to make the stopper area away from the capture area In order to maintain the position of the filter device, the filter device further includes: a scraping part that scrapes from the stopper area in conjunction with the relative rotation of the inner side cover between the completion position and the maintenance position. Take foreign objects.

In addition, the present invention is characterized in that the filter device is long in a predetermined direction, the connecting shaft extends in a crossing direction intersecting with the long direction of the filter device, and all the lengths in the long direction are One end of the inner side cover and the outer side cover is connected to each other, and a guide groove extending parallel to the stopper area is provided on the inner side cover, and the filter device further includes: a rotating shaft, which is connected to the The other end of the front side cover in the longitudinal direction is connected and extends along the crossing direction; the guide shaft is provided with the scraping portion and extends along the crossing direction, and is guided along the stop by the guide groove. The guide of the blocking area; the operation part is arranged on the outer side of the inner side cover and fixed on the guide shaft, and is operated by the user to realize the relative rotation of the inner side cover; and the pillar part is erected between the rotation shaft and the Between the guide shafts, it can rotate around the rotation shaft together with the guide shafts.

In addition, the present invention is characterized in that a through hole through which the operation portion passes is provided in the inner cover so as to be continuous with an end portion of the guide groove.

In addition, the present invention is characterized in that a notch is provided in the inner cover so that a part of the guide groove is opened to the front cover side, and the filter device further includes: a biasing part that opens to the front side The shroud side applies a force to the inside shroud.

In addition, the present invention is a washing machine including: a washing tub that accommodates laundry and is capable of storing water; and the filter device is mounted on an inner peripheral portion of the washing tub.

Invention effect

According to the present invention, in the filter device in the completed state installed in the inner peripheral portion of the washing tub of the washing machine, the water in the washing tub flows into between the back side cover and the front side cover in the completed position and flows from the capture area of the front side cover. The foreign matter contained in the water will be captured in the capture area when the filter hole flows out. Then, when the washing tub rotates, the foreign objects existing in the catch area are peeled off from the catch area due to centrifugal force, and are stopped by the stopper area of the inside cover.

The inner side cover and the front side cover are in a state of being connected by a connecting shaft. When the user removes the filter device and makes the inner side cover rotate relative to the front side cover around the connecting shaft between the completion position and the maintenance position for maintenance, the scraping part will be linked from the stop with the relative rotation of the inner side cover. Scrape foreign matter from the blocking area. Then, when the user relatively rotates the inner side cover to the completion position to return the filter device to a completed state and assemble it on the inner peripheral portion of the washing tub, the maintenance of the filter device is completed. In this way, the user can perform maintenance only by relatively rotating the back cover in addition to the work of attaching and detaching the filter device to the inner peripheral portion of the washing tub. In addition, the scraping part automatically scrapes foreign objects from the stopper area in conjunction with the relative rotation of the inner side cover, so the user does not need to operate cautiously. Thereby, the maintainability of a filter apparatus can be aimed at improving.

In addition, according to the present invention, when the user removes the filter device and operates the operation part arranged outside the back cover for maintenance, the back cover wraps around the connection at one end side of the filter device in the longitudinal direction. The shafts are relatively rotated, and the guide shaft to which the operation part is fixed rotates around the rotation shaft at the other end side in the longitudinal direction of the filter device. At this time, the guide shaft is guided along the stop area by the guide groove provided on the inner side cover, so the scraper provided on the guide shaft moves along the stop area while scraping foreign matter from the stop area. Then, when the user operates the operation part to relatively rotate the inner side cover to the completion position to return the filter device to the completed state and assemble it to the inner peripheral portion of the washing tub, the maintenance of the filter device is completed. In this way, when performing maintenance, the user only needs to operate the operation part for relatively rotating the inner side cover in addition to detaching the filter device from the inner peripheral part of the washing tub, and the scraping part will be removed from the washing tub. The stopper area automatically scrapes foreign matter, so the maintainability of the filter device can be improved.

In addition, according to the present invention, the user can detach the operation part together with the guide shaft from the inner cover by passing the operation part through the through-hole provided so as to be continuous with the end of the guide groove in the inner cover. Accordingly, since the operation portion and the guide shaft can be integrally formed, the number of parts can be reduced.

In addition, according to the present invention, the notch on the inner side cover that partially opens the guide groove to the front side cover side releases the foreign matter entering the guide groove to the outside of the guide groove, thereby preventing the foreign matter from clogging the guide groove. With such a configuration, the edge of the guide groove is pressed against the guide shaft by urging the urging portion toward the front side cover toward the back side cover, so that the guide shaft can be prevented from accidentally passing through the notch and falling out of the guide groove.

Description of drawings

Fig. 1 is a schematic longitudinal sectional right view of a washing machine according to an embodiment of the present invention.

Fig. 2 is a perspective view of the washing tub pulled out of the washing machine.

Fig. 3 is a front view of a filter device according to one embodiment of the present invention.

Fig. 4 is a cross-sectional view taken along the line AA of Fig. 3 .

Fig. 5 is a perspective view of the filter device in a maintenance state.

Fig. 6 is a perspective view of the filter device in a completed state.

Fig. 7 is a sectional view taken along the line BB of Fig. 3 .

Fig. 8 is a perspective view of a filter device according to a first modification in a maintenance state.

Fig. 9 is a perspective view of a filter device according to a second modification in a maintenance state.

Fig. 10 is a perspective view of a filter device according to a second modification viewed from a direction different from that of Fig. 9 .

Fig. 11 is a perspective view of a filter device according to a second modified example in a completed state.

Fig. 12 is a front view of a filter device according to a second modified example.

FIG. 13 is a cross-sectional view taken along the line CC of FIG. 12 .

Fig. 14 is a cross-sectional view corresponding to Fig. 13 of the filter device in a maintenance state.

Explanation of reference signs

1: washing machine; 6: washing bucket; 6C: inner periphery; 10: filter device; 21: inside cover; 21E: stop area; 21G: guide groove; 21J: through hole; 21K: notch; 22: surface side Cover; 22A: filter hole; 22M: capture area; 23: connecting shaft; 24: rotating shaft; 25: guiding shaft; 26: pillar part; 33: operating part; 34: scraping part; : Foreign matter; L: Long dimension direction; Q: Laundry; X: Left-right direction; Z: Up-down direction.

Detailed ways

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. Fig. 1 is a schematic longitudinal sectional right view of a washing machine 1 according to an embodiment of the present invention. The direction perpendicular to the page in FIG. 1 is called the left-right direction X of the washing machine 1, the left-right direction in FIG. 1 is called the front-back direction Y of the washing machine 1, and the up-down direction in FIG. Z. Among the left and right directions X, the rear side of the paper in FIG. 1 is referred to as the left side X1, and the front side of the paper in FIG. 1 is referred to as the right side X2. In the front-back direction Y, the left side is called front Y1, and the right side is called back Y2. Among the up and down directions Z, the upper side is referred to as upper Z1, and the lower side is referred to as lower Z2.

The washing machine 1 includes: a casing 2, which forms the shell of the washing machine 1; an outer tub 3, which is accommodated in the casing 2, and can store water; a water supply path 4, which supplies water to the outer tub 3; and a drainage path 5, which drains water from the outer tub 3 of water. The washing machine 1 further includes: a washing tub 6 accommodated in the outer tub 3 ; a rotary wing 7 disposed in the washing tub 6 ; and a motor 8 generating torque for rotating the washing tub 6 and the rotary wing 7 . The washing machine 1 further includes: a guide cover 9 disposed in the washing tub 6 for circulating water; and a filter device 10 attached to the guide cover 9 and provided in the washing tub 6 to capture foreign matter from the water.

The box body 2 is formed in a box shape. The parts constituting the upper ends of the upper surface 2A and the rear surface 2B in the housing 2 are, for example, a resin-made upper panel 2C. An inlet and outlet 2D that communicates the inside and outside of the housing 2 is formed on the upper surface 2A. A cylindrical partition wall 2E that surrounds the entrance and exit 2D on the upper panel 2C and extends downward Z2. The internal space of the partition wall 2E is a part of the entrance 2D.

A cover 11 for opening and closing the inlet and outlet 2D is provided on the upper surface 2A of the housing 2 . In the region around the entrance and exit 2D in the upper surface 2A, a display operation unit 12 composed of, for example, a liquid crystal operation panel is provided. The user of the washing machine 1 can freely select the operating conditions of the washing machine 1 or instruct the washing machine 1 to start or stop the operation by operating the display operation unit 12 . Information related to the operation of the washing machine 1 is visually displayed on the display operation unit 12 .

The outer tub 3 is made of resin, for example, and is formed in a bottomed cylindrical shape. The outer barrel 3 has: a substantially cylindrical peripheral wall 3A disposed along the vertical direction Z; a bottom wall 3B that blocks the hollow portion of the peripheral wall 3A from below Z2; The upper edge is surrounded and protrudes toward the center side of the peripheral wall 3A. An inlet/outlet 3D communicating with the hollow portion of the peripheral wall 3A from above Z1 is formed inside the annular wall 3C. The entrance 3D is in a state of facing and communicating with the entrance 2D of the box 2 from the bottom Z2. The bottom wall 3B is formed in a disk shape extending substantially horizontally, and a through hole 3E penetrating the bottom wall 3B in the vertical direction Z is formed at the center of the bottom wall 3B.

One end (not shown) of the water supply channel 4 is pulled out of the box body 2 and connected with the faucet. The other end of the water supply channel 4 is arranged in the box body 2, and faces the inside of the outer tub 3 from the inlet and outlet 3D of the outer tub 3 from the upper Z1 as the water supply port 4A. The drainage path 5 is connected to the bottom wall 3B of the tub 3 from the bottom Z2.

A water supply valve 13 is provided in the water supply passage 4 , and a drain valve 14 is provided in the drainage passage 5 . When the water supply valve 13 is opened while the drain valve 14 is closed, water from the faucet flows through the water supply channel 4 and is supplied into the tub 3 from the water supply port 4A to be stored. When the drain valve 14 is opened, the water in the outer barrel 3 will be discharged from the drain 5 to the outside of the machine, that is, outside the casing 2 .

Washing tub 6 is made of metal, for example, and is formed in a bottomed cylindrical shape that is slightly smaller than outer tub 3, and can accommodate laundry Q inside. The washing tub 6 has a substantially cylindrical peripheral wall 6A disposed along the vertical direction Z, and a bottom wall 6B provided at the lower end of the washing tub 6 and closing the hollow portion of the peripheral wall 6A from the bottom Z2. The inner peripheral surface of the peripheral wall 6A constitutes an inner peripheral portion 6C of the washing tub 6 .

At the upper end of the washing tub 6, an inlet and outlet 6D surrounded by the upper end of the inner peripheral surface of the peripheral wall 6A is formed. The port 6D exposes the hollow portion of the peripheral wall 6A upward Z1, and communicates with the port 3D of the tub 3 from the bottom Z2. The user takes out the laundry Q from above Z1 and puts it into the washing tub 6 through the opened entrance 2D, entrance 3D, and entrance 6D. The doorway 2D, the doorway 3D, and the doorway 6D are collectively opened and closed by the cover 11 .

A plurality of through holes 6E are formed in at least one of the peripheral wall 6A and the bottom wall 6B of the washing tub 6 , and water in the outer tub 3 can pass between the outer tub 3 and the washing tub 6 through the through holes 6E. Accordingly, water is stored in washing tub 6 as well, and the water level in outer tub 3 matches the water level in washing tub 6 .

The washing tub 6 is accommodated in the outer tub 3 coaxially. The washing tub 6 housed in the outer tub 3 is rotatable about an axis J extending in the vertical direction Z passing through the center of the washing tub 6 . The washing machine 1 is a vertical washing machine. Strictly speaking, the axis J in this embodiment extends in the vertical direction, but it may extend in an oblique direction with respect to the vertical direction. The axis J also passes through the center of the outer barrel 3 . The direction of rotation of the washing tub 6 coincides with the circumferential direction P around the axis J. As shown in FIG. Hereinafter, the radial direction based on the axis J is referred to as the radial direction R, and among the radial directions R, the side closer to the axis J is referred to as the radially inner side R1, and the side farther from the axis J is referred to as the radially outer side R2.

An annular balancer 15 along the circumferential direction P is attached to an upper end portion of the inner peripheral surface of the washing tub 6 . The balancer 15 dampens the vibration of the washing tub 6 during rotation, and liquid such as salt water for assisting vibration damping is accommodated inside the balancer 15 .

Bottom wall 6B of washing tub 6 is formed in the shape of a disc extending substantially parallel to bottom wall 3B above bottom wall 3B of outer tub 3 with a gap Z1 therebetween. A through-hole 6F penetrating the bottom wall 6B in the vertical direction Z is formed at a center position of the bottom wall 6B that coincides with the axis J. As shown in FIG. A tubular support shaft 16 that surrounds the through hole 6F and extends downward Z2 along the axis J is provided on the bottom wall 6B. The support shaft 16 is inserted through the through-hole 3E of the bottom wall 3B of the tub 3 , and the lower end of the support shaft 16 is positioned Z2 below the bottom wall 3B.

Rotary blade 7 is a so-called pulsator, formed in a disk shape centering on axis J, and arranged on bottom wall 6B in washing tub 6 . A plurality of raised portions 7A raised upward Z1 and radially arranged with the axis J as the center are provided on the upper surface portion of the rotary wing 7 facing the inlet and outlet 6D of the washing tub 6 . A plurality of back blades 7B arranged radially around the axis J are provided on the lower surface of the rotor blade 7 . The lower end portion of the back blade 7B of the rotary blade 7 in the inner space of the washing tub 6 is referred to as a space S. As shown in FIG.

The rotary blade 7 is provided with a rotary shaft 17 extending downward Z2 along the axis J from the central portion thereof. The rotating shaft 17 is inserted through the hollow portion of the supporting shaft 16 , and the lower end of the rotating shaft 17 is located at a position Z2 below the bottom wall 3B of the tub 3 .

The motor 8 is an electric motor such as an inverter motor. The motor 8 is arranged at the lower part Z2 of the outer tub 3 in the casing 2 . The motor 8 has an output shaft 18 protruding upward Z1 and rotating about the axis J, and the motor 8 generates torque and outputs the torque from the output shaft 18 .

A transmission mechanism 19 is interposed between the respective lower ends of the support shaft 16 and the rotating shaft 17 and the upper end of the output shaft 18 of the motor 8 . A known clutch or the like can be used as the transmission mechanism 19 . The transmission mechanism 19 selectively transmits the torque output from the output shaft 18 of the motor 8 to one or both of the support shaft 16 and the rotation shaft 17 . When the torque from the motor 8 is transmitted to the support shaft 16 , the washing tub 6 receives the torque from the motor 8 and rotates around the axis J. As shown in FIG. When the torque from the motor 8 is transmitted to the rotary shaft 17 , the rotary blade 7 receives the torque from the motor 8 and rotates around the axis J.

There are a plurality of guide covers 9 , and they are arranged in a dispersed manner along the circumferential direction P on the inner peripheral surface of the peripheral wall 6A. These guide covers 9 are preferably arranged at equal intervals along the circumferential direction P. As shown in FIG. Each guide cover 9 is in the shape of a groove extending upward Z1 from the lower end of the peripheral wall 6A of the washing tub 6, and is made of, for example, resin. figure 2).

Guide cover 9 is fixed to peripheral wall 6A so as to cover part of peripheral wall 6A from radially inner side R1 , and constitutes a part of inner peripheral portion 6C of washing tub 6 . Between the guide cover 9 and the peripheral wall 6A, a circulating water channel 20 extending upward Z1 from the lower end of the peripheral wall 6A in the washing tub 6 is formed. That is, the guide cover 9 constitutes the circulating water channel 20 . When a plurality of guide covers 9 are present, a plurality of circulating water channels 20 are also provided.

The lower end of the circulating water channel 20 is connected as an inlet 20A of the circulating water channel 20 to the space S where the back blade 7B of the rotary blade 7 is arranged from the radially outer side R2 in the inner space of the washing tub 6 . That is, inlet 20A is arranged on the bottom wall 6B side of washing tub 6 . An opening 9A penetrating the guide cover 9 in the radial direction R is formed in the guide cover 9 . A portion of circulating water channel 20 exposed radially inward R1 from opening 9A is outlet 20B, and outlet 20B is disposed at a higher position than inlet 20A and faces inside washing tub 6 .

The filter device 10 is attached to the guide cover 9 by being fitted into the opening 9A of the guide cover 9 (see also FIG. 2 ). The filter device 10 includes an inner side cover 21 housed in the opening 9A of the guide cover 9 , and a front side cover 22 attached to the inner side cover 21 . The front cover 22 covers the opening 9A. The front cover 22 is provided with a plurality of filter holes 22A. The filter device 10 will be described in detail later.

Washing machine 1 further includes a control unit 100 that executes a washing operation. The control unit 100 is constituted by a microcomputer and is arranged in the housing 2 . The washing operation includes a washing process, a rinsing process, and a dehydration process.

During the cleaning process, the control unit 100 first opens the water supply valve 13 for a predetermined time while closing the drain valve 14 to supply water to the outer tub 3 and the washing tub 6 to a predetermined water level. Before the water is supplied, detergent may be injected into the washing tub 6 by the user. Washing machine 1 may also include an input unit (not shown) for automatically injecting detergent into washing tub 6 . Detergent water in which detergent is dissolved is stored in the outer tub 3 and the washing tub 6 .

After the water is supplied, the control unit 100 controls the transmission mechanism 19 as necessary so that the torque of the motor 8 is transmitted to the rotor blade 7, and then drives the motor 8, thereby rotating the rotor blade 7. In this way, in the washing tub 6, dirt is mechanically removed from the laundry Q by the raised portion 7A of the rotating rotor 7, or the laundry Q is chemically decomposed by the detergent components contained in the detergent water. of dirt.

The water in the space S on the bottom wall 6B side of the washing tub 6 is pushed out radially outward R2 by the back blade 7B of the rotating blade 7 and sent into the inlet 20A of each circulating water channel 20 . The water that flows upward Z1 through each circulating water channel 20 flows into between the inner side cover 21 and the front side cover 22 of the filter device 10, and then passes through the filter hole 22A of the front side cover 22 from the outlet 20B of the circulating water channel 20 to the radially inner side. R1 flows out (see dotted arrow in Fig. 1).

The filter device 10 captures foreign matter such as lint from water passing through the filter hole 22A of the front side cover 22 and retains them in the filter device 10 . The water returned to the washing tub 6 from the outlet 20B circulates in the manner of showering the laundry Q in the washing tub 6 from the upper Z1, dripping into the space S, and then passing through the circulating water channel 20 to the laundry Q. When the rotor 7 rotates for a specified time, the cleaning process ends.

Next, the control unit 100 opens the drain valve 14 to drain the water in the outer tub 3 and the washing tub 6 to the outside of the machine as the drain processing. As the dehydration treatment after the drainage treatment, the control unit 100 controls the transmission mechanism 19 to transmit the torque of the motor 8 to the washing tub 6 while continuing to open the drainage valve 14 , so that the washing tub 6 rotates at a high speed. The laundry Q in the washing tub 6 is dehydrated by the centrifugal force generated by this high-speed rotation. The water seeped from the laundry Q by spinning is discharged to the outside of the machine.

Next, the control part 100 performs a rinsing process. Specifically, the control unit 100 supplies water to the predetermined water level in the outer tub 3 and the washing tub 6 and rotates the rotor blade 7 similarly to the washing process. However, during the rinsing process, tap water will be stored in the outer tub 3 and the washing tub 6 . In the rinsing process, the laundry Q is rinsed in the washing tub 6 by the water agitated by the rotation of the rotary blade 7 and the water circulated through the circulation channel 20 . The rinsing process can be performed multiple times. In addition, instead of storing water in the outer tub 3 and the washing tub 6 to rinse the laundry Q as described above, it is possible to spray water from the water supply channel 4 in a rainy manner in the washing tub 6 rotating at a low speed. Spray rinse with water.

Finally, the control part 100 performs a dehydration process. The content of the dehydration process is substantially the same as that of the above-mentioned dehydration treatment. The dehydration treatment may also be referred to as an intermediate dehydration process and the dehydration process may be referred to as a final dehydration process. During the final dehydration process and the intermediate dehydration process, the rotation speed and rotation time of the washing tub 6 may be different. With the end of the final spinning process, the washing operation itself ends. The washing machine 1 may also have a drying function for drying the laundry Q in the washing tub 6. In this case, the washing tub 6 includes a structure (not shown) for supplying hot air, and the washing operation includes the final dehydration process. drying process.

Next, the filter device 10 will be described in detail. Fig. 3 is a front view of the filter device 10 viewed from the radially inner side R1. Hereinafter, the filter device 10 will be described based on a state where the filter device 10 is mounted on the guide cover 9 . Furthermore, as shown in FIG. 3 , the filter device 10 will be described based on the posture of the filter device 10 when viewed from the radially inner side R1 . Therefore, the left-right direction in FIG. 3 is called the left-right direction X of the filter device 10, the left side in FIG. 3 is called the left side X1, and the right side in FIG. 3 is called the right side X2. The left-right direction X is the same as the above-mentioned circumferential direction P or is a tangential direction with respect to the circumferential direction P.

The filter device 10 is elongated in a predetermined direction, has a longitudinally elongated overall shape in this embodiment, and is attached to the inner peripheral portion 6C of the washing tub 6 in a state in which the elongated direction L is parallel to the vertical direction Z (see figure 2). The left-right direction X of the filter device 10 is an intersecting direction intersecting the long direction L, strictly speaking, it is an orthogonal direction, and is also the short direction of the filter device 10 . In the filter device 10, the whole and details thereof are arranged to be bilaterally symmetrical.

Fig. 4 is a cross-sectional view taken along the line AA of Fig. 3 . Filter device 10 is except comprising above-mentioned inner side cover 21 and surface side cover 22, also comprises: connecting shaft 23, the inner side cover 21 and surface side cover 22 are mutually connected; Rotation shaft 24, links with surface side cover 22; The shaft 25 is connected to the inner side cover 21 ; and the pillar portion 26 is spanned between the rotation shaft 24 and the guide shaft 25 . Hereinafter, first, the front side cover 22 and the back side cover 21 will be described in order, and then other structures will be described.

Fig. 5 is a perspective view of the filter device 10 in a maintenance state. The front side cover 22 in the state of FIG. 5 has a longitudinally long plate shape, and the front side cover 22 mainly shows the surface part 22B. The upper end portion of the front side cover 22 is formed in an arc shape that bulges upward Z1. The front side cover 22 is formed with a concave portion 22C that is recessed downward Z2 from the upper end thereof and penetrates the front side cover 22 in the radial direction R that is the plate thickness direction.

A convex portion 22E protruding radially outward R2 is provided at an upper end portion of the rear surface portion 22D of the front side cover 22 (see FIG. 4 ). The convex portion 22E is a horizontally long hollow body. The inner space of the convex portion 22E is exposed as a depression 22F in a region of the surface portion 22B adjacent to the concave portion 22C below.

An engaging portion 31 is provided at the center of the upper surface of the convex portion 22E. The engaging portion 31 extends substantially horizontally radially inward R1 after being extended upward Z1 and bent, and is partially arranged in the recessed portion 22C. Such an engaging portion 31 is elastically deformable at least in the vertical direction Z. As shown in FIG. A claw 31A extending in the left-right direction X is provided on the upper surface of the engaging portion 31 .

The front side cover 22 is provided with: a left rib 22G protruding radially outward R2 and wrapping the left edge of the front side cover 22 while extending in a belt shape; and a right rib 22H protruding radially outward R2 and covering the surface The right edge of the side cover 22 is hemmed and extends in a belt shape. Each upper end portion of the left rib 22G and the right rib 22H is curved along the arc shape of the upper end portion of the front side cover 22 .

Parts of the respective upper ends of the left rib 22G and the right rib 22H are bent downward Z2 to be exposed in the concave portion 22C, and are connected to the upper surface of the convex portion 22E. An opening 22I (see FIG. 4 ) which is sandwiched between the lower ends of the left rib 22G and the right rib 22H and opens downward Z2 is provided at the lower end of the front side cover 22 .

A U-shaped notch 22J, a locking hole 22K located around the notch 22J, and an L-shaped fitting groove 22L disposed above the notch 22J Z1 are formed in the left rib 22G and the right rib 22H.

The notch 22J is arranged in the upper region of each of the left rib 22G and the right rib 22H, and is opened toward the radially outer side R2. In FIG. 5 , the locking hole 22K is located below and adjacent to the notch 22J, but may be located above and adjacent to the notch 22J (see FIG. 8 and the like). The lock hole 22K is a through hole penetrating through both the left rib 22G and the right rib 22H in the left-right direction X, but may be a depression provided on the inner surfaces of the left rib 22G and the right rib 22H facing each other.

The fitting groove 22L is bent and extends upward Z1 after extending obliquely from the radially outer R2 edge of the left rib 22G and the right rib 22H toward the radially inner R1 and upward Z1 . The upper end portion of the fitting groove 22L is the deepest portion of the fitting groove 22L.

A region of the rear surface 22D of the front cover 22 below Z2 from the convex portion 22E and surrounded by the left rib 22G and the right rib 22H from the left-right direction X is referred to as a capturing region 22M (see FIG. 4 ). A plurality of through-holes 22N arranged at equal intervals along the horizontal direction X and the vertical direction Z are provided in the capture region 22M. An example of each through hole 22N is a vertically long rectangle with rounded four corners, which penetrates the front cover 22 in the radial direction R. As shown in FIG.

The four rectangular portions arranged in the left-right direction X on the surface portion 22B of the front cover 22 adjacent to the lower portion of the recess 22F are protrusions 22O slightly protruding radially inward R1 . A through hole 22N may be provided instead of the protrusion 22O. In addition, a pair of ribs 22P extending in the up-down direction Z may be provided at both ends of the surface portion 22B in the left-right direction X.

The through hole 22N and the convex portion 22O are arranged between the pair of ribs 22P. In addition, a plurality of small holes 22Q penetrating the front side cover 22 in the radial direction R may be provided at positions avoiding the through hole 22N, the convex portion 22O, and the rib 22P in the surface portion 22B.

A mesh sheet 32 is attached to each through-hole 22N so as to close the through-hole 22N (see FIG. 3 ). It should be noted that the illustration of the mesh sheet 32 is omitted in most of the drawings other than FIG. 3 . Innumerable minute through-holes are formed in the mesh sheet 32, and these through-holes are the aforementioned filter holes 22A. The mesh sheet 32 provided in each through-hole 22N of the trapping area 22M is a part of the trapping area 22M. Therefore, the capture area 22M is distributed with a plurality of filter holes 22A. Instead of the mesh sheet 32 , a grid formed integrally with the capture region 22M may be used, and in this case, gaps in the grid function as the filter holes 22A.

The inner side cover 21 is one circle smaller than the front side cover 22 . The inner side cover 21 includes: a plate-shaped flat portion 21A, which is longitudinally long and rectangular; a left rib 21B that wraps the left edge of the flat portion 21A and extends in a belt shape; a right rib 21C that wraps the right side of the flat portion 21A The edge is hemmed and extended in a belt shape; and the bridging portion 21D (see FIG. 4 ) is bridging between the upper ends of the left rib 21B and the right rib 21C.

21 A of flat plate parts are arrange|positioned along the up-down direction Z when the filter apparatus 10 is in the completed state (refer FIG. 4). A surface portion facing the radially inner side R1 in the flat plate portion 21A is referred to as a stopper region 21E. The stop area 21E is a flat surface. A portion facing the radially outer side R2 in the flat plate portion 21A is the rear surface portion 21F (see FIG. 4 ). The lower end portion of the flat plate portion 21A, which is located below the stopper region 21E Z2 , is bent radially inwardly R1 .

The left rib 21B protrudes from the left edge of the flat plate portion 21A toward both outer sides in the radial direction R, that is, the inner side R1 and the outer side R2 in the radial direction. The right rib 21C protrudes to both outer sides in the radial direction R from the right edge of the flat plate portion 21A. The respective upper ends of the left rib 21B and the right rib 21C are disposed so as to be exposed upward Z1 than the upper end of the flat plate portion 21A (see FIG. 4 ).

One linear guide groove 21G extending parallel to the stopper region 21E is provided in each of the left rib 21B and the right rib 21C at a region radially inner R1 from the stopper region 21E of the flat plate portion 21A. The guide groove 21G of the left rib 21B has a slit shape penetrating the left rib 21B in the left-right direction X, and the guide groove 21G of the right rib 21C has a slit shape penetrating the right rib 21C in the left-right direction X.

In each of the left rib 21B and the right rib 21C, a U-shaped notch 21H opening toward the radially inner side R1 is formed at a portion below Z2 from the lower end of the guide groove 21G. A hemispherical locking protrusion 21I is provided in each of the left rib 21B and the right rib 21C in a region radially outer R2 from the stopper region 21E of the flat plate portion 21A. The locking protrusion 21I of the left rib 21B is provided at a position (not shown) near the upper end of the guide groove 21G on the left surface, which is the outer surface of the left rib 21B. The locking protrusion 21I of the right rib 21C is provided at a position near the upper end of the guide groove 21G in the outer surface of the right rib 21C, that is, the right surface.

The bridging portion 21D is arranged at a position above Z1 from the upper end of the flat plate portion 21A, and blocks the space between the left rib 21B and the right rib 21C from above Z1 (see FIG. 4 ).

The connecting shaft 23 has a cylindrical shape extending in the left-right direction X, and is provided at the upper end of the left rib 21B and the right rib 21C above Z1 than the erecting portion 21D (see also FIG. 4 ). The connecting shaft 23 of the left rib 21B protrudes from the upper end portion of the outer surface of the left rib 21B to the left X1, and is in a state of fitting into the deepest part of the fitting groove 22L of the left rib 22G of the front side cover 22 (not shown). The connecting shaft 23 of the rib 21C protrudes in the right direction X2 from the upper end of the outer surface of the right rib 21C, and is fitted into the deepest part of the fitting groove 22L of the right rib 22H of the front cover 22 . As a result, upper ends of the rear side cover 21 and the front side cover 22 , that is, one ends of the rear side cover 21 and the front side cover 22 in the longitudinal direction L are connected to each other by the connecting shaft 23 .

The rear side cover 21 is relatively rotatable with respect to the front side cover 22 around the connection shaft 23 between the completion position (see FIG. 4 ) and the maintenance position shown in FIG. 5 . When the rear side cover 21 is disposed at the completion position, the stopper region 21E of the flat plate portion 21A of the rear side cover 21 faces the capture region 22M of the rear portion 22D of the front side cover 22 from the radially outer side R2 in a state along the vertical direction Z. Set, thus the filter device 10 is completed (refer to FIG. 4 ).

When the inner side cover 21 is relatively rotated from the completion position to the maintenance position, as shown in FIG. 5 , the stopper area 21E is inclined in such a manner as to be away from the capture area 22M toward the radially outer side R2. At this time, the filter device 10 is in a maintenance state.

However, the inner side cover 21 can be relatively rotated only when the filter device 10 is detached from the guide cover 9 and is in an independent state. In addition, by actually turning the front side cover 22 without turning the back side cover 21 , the back side cover 21 can be relatively rotated with respect to the front side cover 22 .

The rotation shaft 24 has a cylindrical shape extending in the left-right direction X, and is connected to the lower end of the front cover 22 , that is, the other end of the front cover 22 in the longitudinal direction L. As shown in FIG. Specifically, the rotation shaft 24 is spanned between the lower ends of the left rib 22G and the right rib 22H of the front cover 22 .

The guide shaft 25 has a cylindrical shape extending in the left-right direction X, and is fitted into each of the guide grooves 21G of the left rib 21B and the right rib 21C of the inner cover 21 one by one. The guide shaft 25 is slidable along the guide groove 21G. Both ends of the guide shaft 25 in the left-right direction X are arranged to be exposed from the guide grooves 21G to the outside of the rear side cover 21 in the left-right direction X. As shown in FIG. At both ends of the guide shaft 25, a disk-shaped operating portion 33 is coaxially fixed. A portion between both end portions of the guide shaft 25 is referred to as a scraper portion 34 .

The strut portion 26 has a linearly extending rod shape, for example, a pair of left and right is provided, and each strut portion 26 is bridged between the rotation shaft 24 and the guide shaft 25 . Therefore, the rotation shaft 24, the guide shaft 25, and the pair of pillar portions 26 together form a rectangular frame.

A portion of each pillar portion 26 connected to the rotation shaft 24 is disposed between the left rib 22G and the right rib 22H of the front cover 22 . A portion of each pillar portion 26 connected to the guide shaft 25 is arranged between the left rib 21B and the right rib 21C of the inner cover 21 . The pillar portion 26 is rotatable about the rotation shaft 24 together with the guide shaft 25 .

In the state where the filter device 10 exists independently, the user can relatively rotate the inner side cover 21 by operating the operation part 33 .

For example, in the state of FIG. 5 , the user slides upward Z1 while pinching the pair of operation parts 33 provided at both ends of the guide shaft 25 between the thumb and forefinger. Then, the guide shaft 25 located at the lower end of each guide groove 21G of the rear side cover 21 rotates around the rotation shaft 24 while being guided by each guide groove 21G along the stopper area 21E of the flat plate portion 21A of the rear side cover 21, thereby guiding the shaft. 25 moves upward Z1 and toward the front side cover 22 side.

Thereby, the back side cover 21 is relatively rotated so that it may approach the front side cover 22, and is finally arrange|positioned at the completion position shown in FIG. At this time, the guide shaft 25 is arrange|positioned at the upper end of each guide groove 21G (refer FIG. 4). In addition, a pair of operation parts 33 are accommodated in corresponding notches 22J in the left rib 22G and the right rib 22H of the front side cover 22 . Further, the locking protrusions 21I respectively provided to the left rib 21B and the right rib 21C of the inner side cover 21 fit into corresponding locking holes 22K in the left rib 22G and the right rib 22H, whereby the inner side cover 21 is positioned at the completion position.

As mentioned above, since the locking hole 22K is located around the notch 22J, the locking hole 22K is located at a position where the force of the user's finger trying to fit the operation portion 33 into the notch 22J is likely to act. Therefore, the user can fit the locking protrusion 21I into the locking hole 22K with a small force. In addition, the lock protrusion 21I may be provided in the front side cover 22 and the lock hole 22K may be provided in the back side cover 21 .

In addition, as shown in FIG. 3 , which is a cross-sectional view taken along the arrow BB, in the rear side cover 21 disposed at the completed position, the notch 21H at the lower end of each of the left rib 21B and the right rib 21C is fitted into the front side cover 22 side. The rotation axis 24.

When the user pinches the pair of operation parts 33 between the thumb and forefinger and removes them from the notch 22J of the front cover 22 in the state where the back cover 21 is arranged at the completed position, the lock protrusion 21I of the back cover 21 will be opened. It is disengaged from the locking hole 22K of the front side cover 22 . At this time, too, the user can remove the locking protrusion 21I from the locking hole 22K with a small force.

Then, the user slides radially outward R2 while continuing to pinch the pair of operation parts 33 . Then, the guide shaft 25 rotates around the rotation shaft 24 while being guided by the guide grooves 21G along the stopper area 21E of the flat plate portion 21A of the rear cover 21 , thereby moving downward Z2 and opposite to the front cover 22 side. As a result, the rear side cover 21 is relatively rotated so as to be separated from the front side cover 22, and thus is finally arranged at the maintenance position (see FIG. 5 ).

As described above, the rear side cover 21 and the front side cover 22 in the filter device 10 in the completed state are fitted to the guide cover 9 by being fitted into the opening 9A of the guide cover 9 (see also FIGS. 1 and 2 ). At this time, the lower end of the front cover 22 and the claw 31A (see FIG. 4 ) of the engaging portion 31 of the front cover 22 are engaged with the guide cover 9 , whereby the filter device 10 is positioned in the opening 9A.

The front side cover 22 is exposed into the washing tub 6 in a state of covering the back side cover 21 from the radially inner side R1 . During the washing process and the rinsing process of the washing operation, the water in washing tub 6 circulates through circulation channel 20 between guide cover 9 and peripheral wall 6A of washing tub 6 as described above. As shown by the arrow W1 in FIG. 7 , the water rises in the filter device 10 along the back surface 21F of the flat plate portion 21A of the inner side cover 21, then passes through the gap V between the flat plate portion 21A and the erection portion 21D, and passes through the erection portion 21D. Guided downward and radially inward R1 , it flows into the space K between the stopper region 21E of the flat plate portion 21A and the capture region 22M of the front cover 22 .

As shown by arrow W2 in FIG. 7 , the water flowing into space K flows out radially inward R1 from filter hole 22A of capture region 22M, and returns to washing tub 6 . Foreign substances such as lint and dust contained in water flowing out from the filter hole 22A are captured in the capture region 22M.

When the washing tub 6 is rotated during the dehydration of the washing operation, the foreign substances present in the trapping area 22M are peeled off from the trapping area 22M by centrifugal force. The foreign matter separated from the capture area 22M is stopped by the stopper area 21E of the flat plate portion 21A of the back cover 21 (see foreign matter F in FIG. 7 ).

After the washing operation, when the user opens the cover 11 and enters the washing tub 6, the lower end portion of the front side cover 22 in the filter device 10 and the claw 31A (refer to FIG. 4 ) of the engaging part 31 of the front side cover 22 are guided When the cover 9 is removed, the filter device 10 can be detached from the guide cover 9 for maintenance. At this time, the user may insert a finger into the recess 22F of the front side cover 22 (see FIG. 6 ).

As mentioned above, the foreign matter F stopped by the stopper area 21E is in a state of being in close contact with the stopper area 21E, and therefore the foreign matter F cannot be removed from the stopper area 21E only by turning the filter device 10 upside down. Therefore, the user operates the operating portion 33 of the filter device 10 as described above in a state where the removed filter device 10 is placed on a dustbin or the like to relatively rotate the back side cover 21 from the completion position to the maintenance position (see Figure 5).

Then, the guide shaft 25 fixed to the operation part 33 moves along the stopper area 21E of the flat plate part 21A of the inner side cover 21, so the scraper part 34 provided on the guide shaft 25 scrapes the foreign matter F from the stopper area 21E.

A user may operate the operation part 33 so that the guide shaft 25 may reciprocate in the guide groove 21G, and thereby repeat the relative rotation of the inner side cover 21 between a completion position and a maintenance position. Thus, the scraping portion 34 scrapes the foreign matter F from the stopper area 21E multiple times in conjunction with the relative rotation of the inner side cover 21 between the completion position and the maintenance position. It should be noted that the scraping portion 34 may also be constituted by a brush, a scraper, etc., so that the scraping portion 34 can effectively scrape the foreign matter F from the stopper area 21E.

The scraped foreign matter F falls into the dustbin due to its own weight, so the user can throw the foreign matter F into the dustbin without touching the foreign matter F. It should be noted that the user only needs to remove the connecting shaft 23 from the fitting groove 22L of the front side cover 22 to expose the capture area 22M of the front side cover 22, so that the residue in the capture area can be removed by cleaning tools such as a brush. 22M and other foreign substances etc. are completely removed. Then, when the user relatively rotates the inner side cover 21 to the completion position to restore the filter device 10 to the completed state and attach it to the inner peripheral portion 6C of the washing tub 6, the maintenance of the filter device 10 is completed.

As mentioned above, when performing maintenance, it is not necessary to separate the rear side cover 21 and the front side cover 22. The user only needs to perform the operation of detaching the filter device 10 from the inner peripheral portion 6C of the washing tub 6. Operation of the operation portion 33 for relatively rotating the rear side cover 21 is sufficient. In addition, the scraping portion 34 automatically scrapes the foreign matter F from the stopper area 21E in conjunction with the relative rotation of the inner side cover 21 , so the user does not need to operate cautiously. Thereby, the maintainability of the filter device 10 can be improved.

Examples of the filter device 10 include the following first modification and second modification. Figures after FIG. 8 show corresponding modified examples. In each of the figures after FIG. 8 , the same reference numerals are attached to the same parts as those already described, and descriptions of those parts are omitted.

Fig. 8 is a perspective view of a filter device 10 according to a first modified example in a maintenance state. The left rib 21B and the right rib 21C of the inner side cover 21 of the filter device 10 of the first modified example are each provided with a through hole 21J through which the operation part 33 passes, and the through hole 21J is connected to the end of the guide groove 21G. set up. The through hole 21J is a circular hole having a diameter larger than that of the operation portion 33, and the respective diameters of the operation portion 33 and the through hole 21J are larger than the groove width H of the guide groove 21G.

Thus, the user can attach and detach the operation portion 33 together with the guide shaft 25 inside by passing the operation portion 33 through the through hole 21J provided so as to be continuous with the end of the guide groove 21G in the inner cover 21. Side cover 21. Therefore, since the operation part 33 and the guide shaft 25 can be integrally formed instead of separately formed, the number of parts can be reduced.

The through hole 21J is preferably arranged at a position away from the movement range of the guide shaft 25 corresponding to the relative rotation of the rear side cover 21 in the guide groove 21G. Thereby, it is possible to prevent the operation part 33 and the guide shaft 25 from accidentally passing through the through hole 21J and falling off the inner cover 21 during the relative rotation of the inner cover 21 between the completion position and the maintenance position.

Furthermore, the through hole 21J is preferably provided so as to be continuous with the upper end portion of the guide groove 21G opposite to the rotation shaft 24 side.

Fig. 9 is a perspective view of a filter device 10 according to a second modified example in a maintenance state. In the filter device 10 according to the second modified example, the left rib 21B and the right rib 21C of the back side cover 21 are each provided with a notch 21K that opens a part of the guide groove 21G to the front side cover 22 side. Specifically, the notch 21K opens only the intermediate portion 21GC between the upper end portion 21GA and the lower end portion 21GB in the guide groove 21G to the front cover 22 side.

Such a notch 21K will release the foreign matter entering the guide groove 21G to the outside of the guide groove 21G, thereby preventing the foreign matter from clogging the guide groove 21G. In addition, since the operation part 33 and the guide shaft 25 can be detached from the inner side cover 21 by passing the guide shaft 25 through the notch 21K, the operation part 33 and the guide shaft 25 can be integrally formed like the first modification.

10 illustrates a positioning protrusion 22R provided in the capture area 22M of the front side cover 22 at a position avoiding the through hole 22N and protruding radially outward R2. The positioning protrusion 22R secures the aforementioned space K (see FIG. 7 ) between the catch area 22M and the stopper area 21E of the back cover 21 of the flat plate portion 21A by contacting the back cover 21 at the completion position. The positioning protrusion 22R can also be used in the filter device 10 of other structures mentioned above.

In Fig. 11 the filter device 10 is illustrated in a completed state. The distance T1 between the outer surfaces of the left and right pair of pillar portions 26 is smaller than the distance T2 between the inner surfaces of the left rib 21B and the right rib 21C of the back cover 21 . The interval T3 between the outer surfaces of the left rib 21B and the right rib 21C of the back cover 21 is smaller than the interval T4 between the inner surfaces of the left rib 22G and the right rib 22H of the front cover 22 .

Therefore, when the filter device 10 is in a completed state by disposing the inner side cover 21 at the completion position, the left and right pair of pillars 26 are accommodated between the left rib 21B and the right rib 21C, and the inner side cover 21 is accommodated between the left rib 22G and the right rib 21C. Between the right ribs 22H, the filter device 10 is thus thinned in the radial direction R in the finished state. This point also applies to the filter device 10 of other structures mentioned above.

In association with the above-mentioned notch 21K, a biasing portion 35 is provided on the bridge portion 21D of the rear side cover 21 according to the second modified example. The urging portions 35 are in the shape of leaf springs that are bent away from the front cover 22 and then extended upward Z1, and are provided at both ends of the bridging portion 21D in the left-right direction X. As shown in FIG. At the upper ends of the left rib 22G and the right rib 22H of the front side cover 22 , a plate-shaped pressing portion 22S bent toward the engagement portion 31 inside the recess 22C is provided.

With the inner side cover 21 in the completed position, the upper end portions 35A of the pair of left and right urging parts 35 are in a pair with the corresponding pressing parts 22S in the left rib 22G and the right rib 22H of the front side cover 22 . (also refer to FIG. 12, which is a cross-sectional view taken along the line CC of FIG. 12, that is, FIG. 13). When the user relatively rotates the inner side cover 21 from the completion position to the maintenance position as described above, the upper end portion 35A approaches the corresponding pressing portion 22S.

When the user further relatively rotates the inner side cover 21 , as shown in FIG. 14 , the upper end portion 35A presses the pressing portion 22S, whereby each biasing portion 35 elastically deforms. Then, each urging part 35 urges the back side cover 21 toward the front side cover 22 side to return to the original shape.

In this way, when the rear side cover 21 is relatively rotated from the completion position to the maintenance position, the biasing portion 35 biases the rear side cover 21 toward the front side cover 22 side, thereby pressing the edge 21GD of the guide groove 21G against the guide shaft. 25. Therefore, it is possible to prevent the guide shaft 25 from accidentally passing through the notch 21K and falling out of the guide groove 21G during the rotation of the rear side cover 21 . It should be noted that, as shown in FIG. 14 , on the inner surfaces of the left rib 22G and the right rib 22H of the front side cover 22, there may be provided a guide for guiding the above-mentioned locking protrusion 21I (see FIG. 10 ) to the locking hole 22K. Slot 22T.

The present invention is not limited to the embodiments described above, and various changes can be made within the scope described in the claims.

Claims

A filter device, located in the washing tub of a washing machine, comprising:

The inner side cover is assembled on the inner periphery of the washing tub;

The front side cover is exposed to the washing tub in a state of covering the inner side cover, and the front side cover is provided with a capture area opposite to the inner side cover and a plurality of filters distributed in the capture area. holes; and

a connecting shaft for connecting the inside cover and the front cover,

The filter device captures foreign matter contained in the water in the washing tub that flows between the front side cover and the back side cover and flows out from the filter hole in the capture area,

The filtering device is characterized in that,

A stopper area is provided on the inside cover to stop foreign objects leaving from the capture area,

The inner side cover is relatively rotatable about the connecting shaft with respect to the front side cover between a completion position and a maintenance position, the completion position being defined by making the stopper area and the capture area face each other. completing a position of the filtering device, the maintenance position being a position with the stop area away from the capture area for servicing the filtering device,

The filtering device further includes: a scraping part, which scrapes foreign matter from the stopper area in conjunction with the relative rotation of the inner side cover between the completion position and the maintenance position.
The filter device according to claim 1, characterized in that,

The filter device is long in the specified direction,

The connecting shaft extends along a crossing direction intersecting with a longitudinal direction of the filter device, and connects one end of the inner side cover and the front side cover in the longitudinal direction to each other,

A guide groove extending parallel to the stop area is provided on the inside cover,

The filtering device also includes:

a rotation shaft connected to the other end of the front side cover in the longitudinal direction and extending in the crossing direction;

A guide shaft, provided with the scraping portion and extending along the crossing direction, is guided along the stop area by the guide groove;

an operating part, arranged on the outer side of the inner cover and fixed to the guide shaft, is operated by the user to realize the relative rotation of the inner cover; and

The pillar part is installed between the rotation shaft and the guide shaft, and can rotate around the rotation shaft together with the guide shaft.
The filter device according to claim 2, characterized in that,

A through hole through which the operation portion passes is provided in the inner cover so as to be continuous with an end portion of the guide groove.
The filter device according to claim 2, characterized in that,

The back side cover is provided with a notch that partially opens the guide groove to the front side cover side,

The filter device further includes a urging unit for urging the inner cover toward the front cover.
A washing machine, characterized in that, comprising:

a washing tub to hold laundry and hold water; and

The filtering device according to any one of claims 1 to 4, which is mounted on the inner peripheral portion of the washing tub.