CN114828720B

CN114828720B - Cleaning device

Info

Publication number: CN114828720B
Application number: CN202080085905.7A
Authority: CN
Inventors: 高阿田贤一; 中山亚维; 羽川达哉
Original assignee: Hitachi Koki Co Ltd
Current assignee: Koki Holdings Co Ltd
Priority date: 2019-12-13
Filing date: 2020-11-27
Publication date: 2023-09-15
Anticipated expiration: 2040-11-27
Also published as: CN114828720A; WO2021117509A1; JP7388448B2; JPWO2021117509A1

Abstract

The invention provides a cleaner with improved cleaning performance of a filter. The filter member (40) has: a filter (41) having air permeability; and a first holder (50) and a second holder (60) which are made of a harder material than the filter (41) and are assembled so as to be detachable from each other. The filter (41) is fixed to the first holder (50) and the second holder (60) by being clamped between the outer peripheral surface of the cylindrical base (51) of the first holder (50) and the inner peripheral surface of the first cylindrical portion (63) of the second holder (60) in a state assembled to the first holder (50) and the second holder (60).

Description

Cleaning device

Technical Field

The present invention relates to a cleaner provided with a filter unit.

Background

Patent document 1 discloses a cleaner. The cleaner has a filter section. The filter unit is composed of a filter having air permeability and a holder harder than the filter. The filter is sewn to the holder by threads or the like.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2018-68726

Disclosure of Invention

Problems to be solved by the invention

The structure of the filter unit of patent document 1 has room for improvement in terms of cleaning performance of the filter because the filter and the holder cannot be separated.

The invention aims to provide a cleaner which improves the cleaning performance of a filter.

Means for solving the problems

One aspect of the present invention is a cleaner. The cleaner comprises: a motor having a drive shaft; a fan rotated by a driving force of the driving shaft; a main body housing that accommodates the motor and the fan therein; an air inlet provided in the main body casing and allowing an air flow generated by the fan to flow into the main body casing; and a filter unit detachably attached to the main body case so as to cover the air inlet, the filter unit capturing dust so as not to flow into the main body case, the filter unit including: a filter having air permeability; and a holder made of a material harder than the filter, the holder including a first member and a second member that are detachably assembled to each other, wherein the filter is fixed to the holder by being sandwiched between the first member and the second member in a state where the first member is assembled to the second member.

The second member may have an engagement portion that engages with the main body case, and the filter portion may be detachably attached to the main body case by the engagement portion engaging with the main body case.

The second member may be detachable from the main body case in a state of being assembled to the first member.

The second member may be detachably attached to the main body case by being rotated about a rotation axis with respect to the main body case, and may be assembled to the first member by being moved in the rotation axis direction with respect to the first member.

The second member may have a seal portion that seals between itself and the main body case.

The first member may have a columnar portion, and the filter may be held in a cylindrical shape by the columnar portion.

The filter may be formed in a bag shape having an opening, the filter may be fixed to the first member so that the first member enters the filter, and the filter unit may be attached to the main body case so that the filter inside communicates with the air inlet through the opening.

The filter device may be configured to include a swirl chamber for generating an air flow swirling around a swirl axis, wherein an interior of the swirl chamber communicates with the air inlet and accommodates the filter device, and the filter may be held in a cylindrical shape around the swirl axis by the first member.

The second member may have an engagement portion which is disposed outside the swirl chamber and engaged with the main body case.

The second member may be formed in a ring shape, and may be disposed so as to surround the air inlet when viewed in the opening direction of the air inlet, the first member may be attached to the inner peripheral side of the second member, and the filter may be interposed between the inner peripheral surface of the second member and the first member.

The filter may be formed in a bag shape having an opening, the air inlet may be located rearward of an inner peripheral portion of the second member, and the first member may be attached to the second member by being inserted from the rear toward the front into an inner peripheral side of the second member in a state where the filter is attached so that the opening faces rearward, and the filter may be interposed between the first member and the second member.

Any combination of the above-described components and a mode in which the expression form of the present invention is changed between methods, systems, and the like are also effective as modes of the present invention.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, a cleaner having improved cleaning performance of a filter can be provided.

Drawings

Fig. 1 is a side sectional view of a cleaner 1 according to embodiment 1 of the present invention.

Fig. 2 is an enlarged cross-sectional view of a main portion of fig. 1.

Fig. 3 is a cross-sectional view of the portion other than the filter member 40 removed from fig. 2.

Fig. 4 is a cross-sectional view of the filter member 40 taken by a cross-section (a cross-section indicated by A-A line in fig. 9 (B)) different from that of fig. 3.

Fig. 5 is a V-V cross-sectional view of fig. 1.

Fig. 6 is an exploded perspective view of the filter member 40.

Fig. 7 is a perspective view of the filter member 40.

Fig. 8 (a) is a rear view of the first holder 50 of the filter member 40. Fig. 8 (B) is a B-B cross-sectional view of fig. 8 (a). Fig. 8 (C) is a front view of the first holder 50.

Fig. 9 (a) is a sectional view A-A of fig. 9 (B). Fig. 9 (B) is a rear view of the second holder 60 of the filter member 40. Fig. 9 (C) is a C-C cross-sectional view of fig. 9 (B). Fig. 9 (D) is a front view of the second holder 60.

Fig. 10 is a side sectional view of a cleaner 1A according to embodiment 2 of the present invention.

Fig. 11 is an enlarged cross-sectional view of the filter member 40A of the cleaner 1A.

Fig. 12 is a cross-sectional view of XII-XII of fig. 10.

Fig. 13 is an exploded perspective view of the filter member 40A.

Fig. 14 is a perspective view of the filter member 40A.

Detailed Description

Hereinafter, the same or equivalent components and parts shown in the drawings are denoted by the same reference numerals, and overlapping description thereof is omitted as appropriate. The embodiments are not limited to the invention, but are exemplified. All features described in the embodiments and combinations thereof are not necessarily essential to the invention.

Embodiment 1 of the present invention will be described with reference to fig. 1 to 9. The present embodiment relates to a cleaner 1. The cleaner 1 is a cordless and portable cyclone-type electric cleaner. Referring to fig. 1 and 5, the directions of the cleaner 1, which are orthogonal to each other, are defined in the front-rear direction, the up-down direction, and the left-right direction. The front-rear direction is a direction parallel to a rotation shaft (drive shaft) 6a of the motor 6. The right-left direction is defined with reference to the case where the cleaner 1 is viewed from the front. The whole of the rotation shaft 6a and its extension are also labeled as "center axis". In fig. 2, the dust box 3 and the fan housing 20 shown in fig. 1 are omitted.

The housing of the cleaner 1 is constituted by a main body casing 2 and a dust box 3. The main body case 2 and the dust box 3 are each, for example, a resin molded body. The dust box 3 is detachably connected to and fixed to the front of the main body casing 2. The dust box 3 has an air suction pipe portion 3a and a swirl chamber 3c. The front end opening of the suction pipe portion 3a is an air inlet (dust box air inlet). An extension tube or flexible hose, not shown, can be attached to the suction port. The suction pipe portion 3a is provided below the swirl chamber 3c. The rear end portions of the suction pipe portion 3a and the swirl chamber 3c communicate with each other via a valve portion 3 b. The valve portion 3b passes the air flow from the air suction pipe portion 3a to the swirl chamber 3c, and blocks the air flow from the swirl chamber 3c to the air suction pipe portion 3 a. The air flow taken into the swirl chamber 3c from the air intake pipe 3a becomes an air flow swirled around the swirl axis in the swirl chamber 3c. The rotation axis is consistent with the central axis. A filter member 40 is detachably attached to and accommodated in the swirl chamber 3c. The rear end of the swirl chamber 3c is open. The filter member 40 is disposed in such a manner as to cover the opening.

As shown in fig. 5, the main body casing 2 has a left-right double-cut structure. That is, the main body casing 2 fixes and integrates the left main body casing 2f and the right main body casing 2g, which are independent members to each other, by screw fixation or the like. As shown in fig. 1, the main body case 2 includes a housing portion 2a, a handle portion 2b, and a battery pack attachment portion 2c. The housing portion 2a corresponds to a front portion of the main body case 2. The housing portion 2a houses the motor 6, the dust collection fan 9, the fan guide 10, and the fan housing 20. The handle portion 2b extends rearward from the upper end of the housing portion 2a. The operator holds the handle portion 2b to operate the cleaner 1. An operation panel (switch portion) 5 is provided on the upper surface of the handle portion 2 b. The start/stop of the cleaner 1 and the air volume of the cleaner 1 can be switched by various switches provided on the operation panel 5. An illumination section 8 such as an LED for illuminating the front is provided at a position of the handle section 2b in front of the operation panel 5. The battery pack attachment portion 2c is a portion corresponding to the rear lower portion of the main body case 2. The battery pack 4 as a power source of the cleaner 1 is detachably attached to the battery pack attaching portion 2c. Exhaust ports 2e are provided on both left and right side surfaces of the rear end portion of the main body casing 2.

As shown in fig. 2, the main body case 2 has a cylindrical portion 2h protruding forward at the front end portion. The cylindrical portion 2h is provided with an inwardly protruding flange portion 2i. The flange portion 2i is a plate-like portion perpendicular to the front-rear direction. The flange 2i is provided so as to surround the center axis in a circle. The inner edge of the flange 2i is an opening edge of the air inlet (housing air inlet) 2 d. The air inlet 2d is a circular through hole penetrating in the extending direction of the rotary shaft 6a about the central axis. The intake port 2d is formed across the left main body casing 2f and the right main body casing 2 g. The suction port 2d communicates with the space in the swirl chamber 3c. The front of the suction port 2d is covered with the filter member 40.

The motor 6 is a known brush-carrying electric motor. The motor 6 is constituted as a unit including a motor housing and a bearing. The motor 6 is operated by the power supplied from the battery pack 4. The rear end portion of the motor 6 is supported by the main body casing 2 via an elastic body 7 for vibration isolation. A dust collection fan 9 is mounted on the rotary shaft 6a of the motor 6. The dust collection fan 9 rotates integrally with the rotation shaft 6a around the rotation shaft 6 a. The rotation shaft 6a is also a central shaft of the dust collection fan 9. The dust collection fan 9 is a centrifugal fan. The dust collection fan 9 is accommodated in an inner space formed by the fan guide 10 and the fan housing 20. The outer diameters of the fan guide 10 and the fan housing 20 are larger than the outer diameter of the dust collecting fan 9. The dust collection fan 9 has an outer diameter larger than that of the motor housing. The fan guide 10 and the fan cover 20 are each, for example, a resin molded body.

The fan guide 10 is fixed to the front surface of the motor 6 by screw fixation or the like. The fan cover 20 is fixed to and integrated with the fan guide 10 by a claw engagement or the like. The fan guide 10 is located behind the dust collection fan 9. The fan guide 10 has a not-shown vent through which the airflow generated by the dust collection fan 9 passes. The fan housing 20 is cylindrical with the rotation shaft 6a as the center. The rear end of the fan housing 20 is open. The front end of the fan housing 20 is not open except for an air inlet (fan housing air inlet) 21. That is, the air inlet 21 is provided on the front surface of the fan cover 20. The air inlet 21 is a circular through hole penetrating in the extending direction of the rotary shaft 6a about the central axis. The air inlet 21 communicates with the space in the swirl chamber 3c.

The sealing member 30 seals (hermetically closes) between the main body casing 2 and the fan cover 20. Specifically, the sealing member 30 is in contact with the inside of the air inlet 2d in the main body casing 2 and the outside of the air inlet 21 in the fan cover 20, and seals the space between the air inlet 2d and the air inlet 21 so that air cannot pass through the inside and outside of the main body casing 2 and the fan cover 20. The sealing member 30 also has a vibration-proof function. The sealing member 30 is an elastic body such as rubber. The seal member 30 is formed in an annular shape centering on the central axis. The air inlet 2d communicates with the air inlet 21 by using a hole provided in the center of the sealing member 30 as a communication path. The sealing member 30 is disposed around the suction port 21. The outer diameter of the sealing member 30 is smaller than the outer diameter of the fan housing 20. The outer diameter of the sealing member 30 is larger than the outer diameter of the elastic body 7.

The filter member 40 has: a filter 41 having air permeability; a first holder 50 as a first member; and a second holder 60 as a second member. The filter 41 is, for example, cloth. The filter 41 is formed in a bag shape with an open rear end. The filter 41 communicates with the air inlet 2d of the main body casing 2 and the air inlet 21 of the fan cover 20 through its own opening. The first holder 50 and the second holder 60 are made of a material harder than the filter 41. The first holder 50 and the second holder 60 are each, for example, a resin molded body. The first holder 50 and the second holder 60 are detachably assembled to each other to constitute a holder for holding the filter 41. The filter 41 is sandwiched between the first holder 50 and the second holder 60 in a state where the first holder 50 is assembled to the second holder 60, thereby being fixed with respect to the first holder 50 and the second holder 60.

The first holder 50 has a cylindrical base 51 and a columnar portion 54. The cylindrical base 51 is cylindrical with the central axis as the center. A notch 52 is provided at the rear end of the tubular base 51. The notch 52 is an engagement portion that engages with the engagement projection 64 of the second holder 60. The plurality of notches 52 are provided in a circumferential direction (hereinafter, also simply referred to as "circumferential direction") around the central axis. Specifically, 4 notch portions 52 are provided at 90-degree intervals in the circumferential direction. The rear end portion of the tubular base 51 is provided with a convex portion (convex strip portion) 53 over the entire periphery except the notch portion 52. The convex portion 53 protrudes from the cylindrical base portion 51 in a radial direction (hereinafter, also simply referred to as "radial direction") centered on the central axis. The columnar portion 54 extends forward from the front end of the tubular base portion 51. The columnar portion 54 is a shape retaining portion that retains the filter 41 in a cylindrical shape centered on the rotation axis.

The second holder 60 has a partition wall portion 61, a first cylindrical portion 63, and a second cylindrical portion 66. The partition wall 61 has a substantially circular plate shape perpendicular to the central axis about the central axis. The partition wall 61 forms a rear wall of the swirl chamber 3c outside the filter 41. The center portion of the partition wall portion 61 is open. A pair of knob portions 62 is provided on the front surface of the partition wall portion 61. The knob 62 is a protrusion protruding forward from the partition wall 61. The handle 62 is a portion to be pinched by an operator when attaching and detaching the filter member 40 to and from the housing 2.

The first cylindrical portion 63 protrudes rearward from the opening edge portion in the center of the partition wall portion 61. The first cylindrical portion 63 is cylindrical with the central axis as the center. The first cylindrical portion 63 has an inner peripheral surface provided with an engagement projection 64. As shown in fig. 2 and the like, the locking convex portion 64 is engaged with the notch portion 52 of the first holder 50. The engagement of the locking convex portion 64 with the notch portion 52 prevents the first holder 50 from falling off the second holder 60 rearward. The plurality of locking projections 64 are provided in the circumferential direction. Specifically, 4 locking projections 64 are provided at 90-degree intervals in the circumferential direction. Cutouts 69 are provided on both circumferential sides of the locking projection 64. The notch 69 is a portion cut from the rear end of the first cylindrical portion 63. The locking convex portion 64 is easily inclined radially outward by the notch 69. The first cylindrical portion 63 has a recess 65 formed on the entire inner peripheral surface of the rear end portion. As shown in fig. 4, the concave portion 65 engages with the convex portion 53 of the first holder 50. The engagement of the concave portion 65 with the convex portion 53 prevents the first holder 50 from coming off the second holder 60 forward.

The second cylindrical portion 66 protrudes rearward from the partition wall portion 61 radially outward of the first cylindrical portion 63. The second cylindrical portion 66 is cylindrical with the central axis as the center. The second cylindrical portion 66 has engaging portions 67 provided at an upper portion and a lower portion of a rear end portion thereof. The engagement portion 67 is a portion protruding radially outward from the second cylindrical portion 66. A protrusion 67a is provided at the circumferential center of the engagement portion 67. The protruding portion 67a protrudes radially outward from the engaging portion 67. As shown in fig. 2, the engaging portion 67 is located at the rear side of the wall portion 2k of the main body case 2. The engaging portion 67 is pressed by the wall portion 2k from the front, and prevents the second holder 60 from coming off the main body case 2 from the front. As shown in fig. 5, the projection 67a is fitted into the recess 2j provided in the main body case 2. By fitting the protrusion 67a into the recess 2j, the second holder 60 can be prevented from rotating relative to the main body case 2. The engagement and release of the engagement portion 67 with the main body case 2 can be performed in a state where the second holder 60 is assembled to the first holder 50. That is, the second holder 60 is detachable from the main body case 2 in a state of being assembled to the first holder 50. A seal 68 as a seal portion is provided between the first cylindrical portion 63 and the second cylindrical portion 66 in the radial direction on the rear surface of the partition wall portion 61. The seal 68 is an annular elastomer. The seal 68 is pressed against the cylindrical portion 2h of the main body case 2 over the entire circumference, and hermetically seals the space between the second holder 60 and the main body case 2.

The assembly sequence of the filter member 40 will be described. First, the columnar portion 54 of the first holder 50 is inserted into the opening of the filter 41. When inserted deep, the inner surface of the opening of the filter 41 approaches the outer peripheral surface of the cylindrical base 51 of the first holder 50. Next, the columnar portion 54 and the filter 41 are inserted into the opening in the center of the second holder 60. At this time, the notch 52 of the first holder 50 and the locking convex 64 of the second holder 60 are inserted in alignment with each other in the circumferential direction. Then, the locking convex portion 64 is deflected radially outward and passes over the cylindrical base portion 51, and is fitted into the notch portion 52 (is engaged with the notch portion 52) as shown in fig. 3. At this time, as shown in fig. 4, the convex portion 53 of the first holder 50 and the concave portion 65 of the second holder 60 are engaged with each other. The rear end portion of the filter 41 is sandwiched between the outer peripheral surface of the cylindrical base portion 51 of the first holder 50 and the inner peripheral surface of the first cylindrical portion 63 of the second holder 60. The filter member 40 is assembled through the above steps.

The order of attaching the filter member 40 to the main body case 2 is as follows. The filter member 40 is assembled to the main body case 2 from the front side in a state in which the second holder 60 is rotated 45 degrees clockwise around the central axis with respect to the rotational position of fig. 5. Thereafter, the filter member 40 is rotated counterclockwise by 45 degrees about the central axis. Then, the engaging portion 67 of the second holder 60 is wound around the back of the wall portion 2k of the main body case 2, and the protruding portion 67a is fitted into the recess portion 2j of the main body case 2. In order to detach the filter member 40 from the main body case 2, the reverse order of the mounting order is only required. That is, the filter member 40 may be rotated 45 degrees clockwise about the central axis and separated forward from the main body casing 2.

In order to disassemble the filter element 40, the reverse of the assembly step may be performed. That is, first, the first holder 50 is pulled out rearward from the second holder 60. At this time, by applying a force to the first holder 50 to a certain extent or more rearward, the engagement between the locking convex portion 64 and the notch portion 52 can be released. If the first holder 50 is pulled out from the second holder 60, the filter 41 is detached from the first holder 50 forward.

The operation of the cleaner 1 will be described. When the operator operates the switch of the operation panel 5 to drive the motor 6, the dust collection fan 9 is rotated by the driving force of the motor 6. The air flow generated by the dust collection fan 9 is taken into the swirl chamber 3c from the air suction pipe portion 3 a. The airflow is swirled in the swirl chamber 3c, and enters the fan housing 20 through the filter member 40 from the air inlets 2d, 21. The airflow is sucked into the dust collecting fan 9, discharged to the outside, guided by the fan cover 20, and discharged to the rear from a not-shown vent of the fan guide 10. The air flow is finally discharged from the exhaust port 2e to the outside of the main body casing 2. Dust entering from the inlet 3a together with the airflow is centrifugally separated in the swirl chamber 3c, and accumulated in the swirl chamber 3c and outside the filter member 40. The dust not centrifugally separated is collected by the filter 41 of the filter member 40, and accumulated in the swirl chamber 3c and outside the filter member 40.

According to the present embodiment, the following effects can be achieved.

(1) Since the filter 41 can be separated from the first holder 50 and the second holder 60, the filter 41 is easily cleaned. Particularly, the filter 41 is easily washed with water, and the filter 41 is easily kept clean. Further, since the first holder 50 and the second holder 60 do not need to be replaced together at the time of replacing the filter 41, waste can be reduced.

(2) In manufacturing the filter member 40, it is not necessary to fix the filter 41 by sewing it to a holder or the like. Therefore, the filter member 40 can be easily manufactured.

(3) The engagement of the filter member 40 with the main body case 2 is performed at the rear of the partition wall 61, that is, at the outside of the swirl chamber 3c. That is, the engaging portion 67 of the second holder 60 and the main body case 2 engaged therewith are provided outside the swirl chamber 3c. Therefore, the influence of the engagement structure of the filter member 40 and the main body case 2 on the swirling flow in the swirling chamber 3c can be suppressed, and the efficiency of centrifugal separation of dust can be improved.

Embodiment 2 of the present invention will be described with reference to fig. 10 to 14. The present embodiment relates to a cleaner 1A. The cleaner 1A is a cordless and portable non-cyclone type electric vacuum cleaner. Hereinafter, differences from embodiment 1 will be mainly described. An air inlet (dust box air inlet) 3d is provided at the front end portion of the dust box 3. An extension tube or flexible hose, not shown, can be attached to the inlet 3d. A filter member 40A is detachably provided in the dust box 3.

The first holder 50 of the filter member 40A has a through hole 52A in a cylindrical base 51. The through hole 52A is an engagement portion that engages with the engagement convex portion 64 of the second holder 60. The through holes 52A are provided in plurality in the circumferential direction. Specifically, 4 through holes 52A are provided at 90-degree intervals in the circumferential direction. The through hole 52A replaces the notch 52 of embodiment 1. The cylindrical base 51 is provided with engaging portions 57 at an upper portion and a lower portion of a rear end portion thereof, respectively. The engagement portion 57 is a portion protruding radially outward from the tubular base portion 51. A protrusion 57a is provided at a circumferential center of the engagement portion 57. The protruding portion 57a protrudes radially outward from the engaging portion 57. The engaging portion 57 and the protruding portion 57a replace the engaging portion 67 and the protruding portion 67a of embodiment 1. That is, in the present embodiment, the engagement structure with the main body case 2 is provided in the first holder 50. A seal 58 as a seal portion is provided at the rear end portion of the cylindrical base 51. The seal 58 is an annular elastomer. The seal 58 is pressed against the front surface of the main body casing 2 over the entire circumference, and hermetically seals between the first holder 50 and the main body casing 2. The present embodiment can also provide the same effects as those (1) and (2) of embodiment 1.

The present invention has been described above by way of example of embodiments, but it will be apparent to those skilled in the art that various modifications can be made to the components of the embodiments or the processes within the scope of the claims. For example, the cleaner of the present invention may be of a belt cord type that operates with power supplied from an external ac power supply. The motor may also be a brushless motor.

Symbol description

1. 1A cleaner (electric cleaner); 2a main body housing; 2a housing part; 2b a handle portion; 2c a battery pack mounting portion; 2d suction port (housing suction port); 2e exhaust port; 2f left housing; 2g of right shell; 2h of a cylindrical part; 2i flange portions; 2j recesses; 2k wall portions; 3, a dust box; 3a an air suction pipe part; a 3b valve part; a 3c swirl chamber; 3d suction port (dust box suction port); 4, a battery pack; 5 an operation panel (switch section); 6, a motor; 6a rotation shaft (drive shaft); 7 an elastomer; 8, an illumination part; 9 a dust collection fan; 10 a fan guide; 20 fan housing; 21 air intake (fan housing air intake); 30 sealing means; 40. a 40A filter component; a 41 filter; 50 a first holder (first part); a 51 cylindrical base; 52 notch portions (engaging portions); 52A through-holes (engaging portions); 53 convex portions (convex strips); 54 columnar portions; 57 engagement portions; 57a protrusions; 58 seals (seals); 60 a second holder (second component); 61 dividing wall portions; 62 pinching the hand; 63 a first cylindrical portion; 64 locking convex parts; 65 concave parts; 66 a second cylindrical portion; 67 engaging portions; 67a protrusions; 68 seals (sealing portions); 69 cuts.

Claims

1. A cleaner, characterized by comprising:

a motor having a drive shaft;

a fan rotated by a driving force of the driving shaft;

a main body housing that houses the motor and the fan therein;

an air inlet provided in the main body casing and allowing an air flow generated by the fan to flow into the main body casing; and

a filter unit detachably attached to the main body case so as to cover the air inlet, for trapping dust so as not to flow into the main body case,

the filter unit has:

a filter having air permeability; and

a holder made of a material harder than the filter and including a first member and a second member detachably assembled to each other,

in a state where the first member is assembled to the second member, the filter is held between the first member and the second member, thereby being fixed with respect to the holder,

the filter unit is detachably attached to the main body case by rotating with respect to the main body case around a rotation axis,

the second member is assembled to the first member by being moved relative to the first member in the rotation axis direction.

2. A cleaner, characterized by comprising:

a motor having a drive shaft;

a fan rotated by a driving force of the driving shaft;

a main body housing that houses the motor and the fan therein;

the filter unit has:

a filter having air permeability; and

the second member has an engagement portion engaged with the main body case, and the filter portion is detachably attached to the main body case by the engagement portion being rotated with respect to the main body case around a rotation axis,

the first member has a columnar portion and,

the filter is held in a cylindrical shape by the columnar portion.

3. The cleaner of claim 2, wherein the cleaning device comprises a cleaning blade,

the second member is detachable from the main body case in a state of being assembled to the first member.

4. The cleaner of claim 2, wherein the cleaning device comprises a cleaning blade,

the second member has a sealing portion that seals between itself and the main body case.

5. The cleaner of claim 3 wherein the cleaning fluid is,

6. The cleaner of claim 2, wherein the cleaning device comprises a cleaning blade,

the second member has a knob portion protruding in the rotation axis direction.

7. The cleaner of claim 2, wherein the cleaning device comprises a cleaning blade,

the filter is formed in a bag shape having an opening, is fixed to the first member in such a manner that the first member enters the inside of the filter,

the filter unit is attached to the main body case so that the filter interior communicates with the air inlet through the opening.

8. The cleaner of claim 7, wherein the cleaning device comprises a cleaning blade,

has a swirl chamber for generating an air flow swirled around a swirl axis,

the swirl chamber communicates with the air inlet and accommodates the filter device,

the filter is held by the first member in a cylindrical shape centered on the swivel axis.

9. The cleaner of claim 8, wherein the cleaning fluid is,

the second member has an engagement portion disposed outside the swirl chamber and engaged with the main body case.

10. A cleaner as claimed in any one of claims 1 to 9,

the second member is formed in a ring shape and is disposed so as to surround the air inlet when viewed in the opening direction of the air inlet,

the first member is attached to the inner peripheral side of the second member,

the filter is sandwiched between the inner peripheral surface of the second member and the first member.

11. The cleaner of claim 10, wherein the cleaning fluid is,

the filter is formed in a bag shape having an opening,

the suction port is located rearward of an inner peripheral portion of the second member,

the first member is attached to the second member by being introduced from the rear side toward the front side into the inner peripheral side of the second member in a state where the filter is attached with the opening facing the rear side, and the filter is sandwiched between the first member and the second member.