Dust collector

Abstract

The invention provides a dust collector which can restrain enlargement of the dust collector. The vacuum cleaner is provided with: a main body housing having a suction port; a motor assembly which is housed in the main body housing, includes a fan motor that rotates about a rotation axis, and causes the suction port to generate a suction force; and a first flow path which is provided between the motor assembly and the main body housing in the radial direction of the rotating shaft, is provided only in a part of the rotating shaft in the circumferential direction, extends in the front-back direction parallel to the rotating shaft, and allows air discharged from the motor assembly to flow therethrough.

Description

TECHNICAL FIELD

[0001] The technology disclosed in this specification relates to a dust collector. BACKGROUND

[0002] In the technical field to which the dust collector pertains, there is known a dust collector as disclosed in Patent Literature 1.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent No. 7514668 SUMMARY

[0006] When the dust collector is upsized, the user of the dust collector can have difficulty in operating the dust collector.

[0007] The technology disclosed in this specification aims to suppress upsizing of the dust collector.

[0008] A dust collector is disclosed in this specification. The dust collector can be provided with: a main body housing having a suction port; a motor assembly housed in the main body housing, including a fan motor that rotates about a rotational shaft, and causing the suction port to generate a suction force; and a first flow path provided between the motor assembly and the main body housing in a radial direction of the rotational shaft, and provided only on a part of a circumferential direction of the rotational shaft, extending in a front-rear direction parallel to the rotational shaft, for air discharged from the motor assembly to flow.

[0009] EFFECT OF THE INVENTION

[0010] According to the technology disclosed in this specification, it is possible to suppress upsizing of the dust collector. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a view of a dust collector and an extension tube according to an embodiment, as viewed from the right upper front.

[0012] Figure 2 is a view of a dust collector according to an embodiment, as viewed from the right upper front.

[0013] Figure 3 is a view of a dust collector according to an embodiment, as viewed from the right side.

[0014] Figure 4 is a sectional view of a dust collector according to an embodiment.

[0015] Figure 5 is an exploded view of a dust collector according to an embodiment, as viewed from the right upper front.

[0016] Figure 6is an exploded view of a dust collector according to an embodiment, as viewed from the right upper front.

[0017] Figure 7 is an exploded view of a dust collector according to an embodiment, as viewed from the right upper front.

[0018] Figure 8 is a sectional view of a dust collector according to an embodiment.

[0019] Figure 9 is a view of a portion of a dust collector according to an embodiment, as viewed from the right upper front.

[0020] Figure 10 is a view of a motor assembly, a first elastic member, a second elastic member, and a third elastic member according to an embodiment, as viewed from the right upper front.

[0021] Figure 11 is a view of a motor assembly, a first elastic member, a second elastic member, and a third elastic member according to an embodiment, as viewed from the right upper front.

[0022] Figure 12 is a sectional view of a first elastic member of a dust collector according to an embodiment, as viewed from the right upper front.

[0023] Figure 13 is a view of a portion of a dust collector according to an embodiment, as viewed from the right side.

[0024] Figure 14 is a view of a portion of a dust collector according to an embodiment, as viewed from the right rear.

[0025] Figure 15 is a sectional view of a dust collector according to an embodiment.

[0026] BRIEF DESCRIPTION OF REFERENCE NUMERALS

[0027] 1…suction cleaner; 2…main body assembly; 3…filter assembly; 4…dust collection assembly; 5…main body housing; 5L…left housing; 5R…right housing; 5S…screw; 6…battery mounting portion; 7…motor assembly; 8…fan motor; 9…operation panel; 9A…mode switching button; 9B…drive button; 9C…display portion; 10…light; 11…main body portion; 11R…recessed portion; 12…handle portion; 13…battery holding portion; 14…suction port; 15…exhaust port; 16…partition wall portion; 17…battery pack; 18…support frame; 19…filter; 20…control substrate; 22…motor housing; 22A…air inlet; 22B…air outlet; 23…cylindrical portion; 23A…claw portion; 24…fan cover; 24A…cylindrical portion; 24B…hook portion; 24C…plate portion; 24D…rib portion; 26…foot portion; 27…first rib; 27A…first upper rib; 27B…first lower rib; 28…second rib; 28A…second upper rib; 28B…second lower rib; 29…holding rib; 29A…holding upper rib; 29B…holding lower rib; 30…cyclone housing; 30R…recessed portion; 31…support plate portion; 32…opening portion; 33…outlet; 34…suction pipe portion; 34C…power supply terminal; 35…inlet; 36…locking mechanism; 37…locking mechanism; 40…cyclone dust collection unit; 42…dust collection cup; 44…locking mechanism; 50…filter unit; 51…pre-filter; 52…silencing member; 53…post-filter; 60…outer flow path (first flow path); 60A…outer upper flow path; 60B…outer lower flow path; 60C…outer left flow path; 60D…outer right flow path; 60E…outer left upper flow path; 60F…outer right lower flow path; 60G…outer right upper flow path; 60H…outer left lower flow path; 61…exhaust space; 62…first silencing member; 62A…first upper silencing member; 62B…first lower silencing member; 621…first flow-through hole; 64…second silencing member; 641…second flow-through hole; 66…inner flow path (second flow path); 66A…inner upper flow path; 66B…inner lower flow path; 68…housing flow path; 71…first elastic member; 71A…large diameter portion; 71B…small diameter portion; 71C…vent; 72…second elastic member; 72A…main portion; 72B…support portion; 73…third elastic member; 73A…recessed portion; 100…suction nozzle; 101…extension pipe; 102…rotary brush; 711…metal mesh portion; 712…synthetic resin portion; 713…rubber portion; AX…rotation axis. DETAILED DESCRIPTION

[0028] In one or more embodiments, a vacuum cleaner can include a main body housing having a suction port; a motor assembly housed in the main body housing and including a fan motor rotating about a rotational axis and generating a suction force at the suction port; and a first flow path provided between the motor assembly and the main body housing in a radial direction of the rotational axis and extending in a front-rear direction parallel to the rotational axis, the first flow path being provided only in a part of a circumferential direction of the rotational axis and allowing air discharged from the motor assembly to flow therethrough.

[0029] According to the above-described configuration, since the first flow path is provided only in a part of the circumferential direction of the rotational axis, the vacuum cleaner can be prevented from being enlarged in size. In particular, the main body housing can be prevented from being enlarged in size in the radial direction.

[0030] In one or more embodiments, the first flow path can be provided on one or both of an upper side and a lower side of the motor assembly.

[0031] According to the above-described configuration, since the first flow path is provided on one or both of the upper side and the lower side of the motor assembly, the main body housing can be prevented from being enlarged in size in the left-right direction.

[0032] In one or more embodiments, a vacuum cleaner can include a suction pipe portion through which air to be suctioned to the suction port flows, and a dust cup disposed at a position further forward than the suction port. The suction pipe portion and the dust cup can be disposed in an up-down direction. The first flow path can be provided on the upper side and the lower side of the motor assembly, respectively.

[0033] According to the above-described configuration, since the suction pipe portion and the dust cup are disposed in the up-down direction, the vacuum cleaner can be enlarged in size in the up-down direction at the suction pipe portion and the dust cup. A dead space can be formed at a rear side of the suction pipe portion and the dust cup. Since the first flow path is provided on the upper side and the lower side of the motor assembly, respectively, the first flow path can be disposed in the dead space at the rear side of the suction pipe portion and the dust cup. Since the dead space is effectively utilized, the main body housing can be prevented from being enlarged in size in the left-right direction. In addition, since the air discharged from the motor assembly flows through the first flow path on the upper side of the motor assembly and the first flow path on the lower side of the motor assembly, respectively, the air can be prevented from being reduced in flow rate.

[0034] In one or more embodiments, the main body housing can include a first rib protruding from an inner surface of the main body housing and facing a portion of an outer surface of the motor assembly, and a second rib protruding from the inner surface of the main body housing and disposed at a position further outward in the radial direction than the first rib. The first flow path can be provided between the first rib and the second rib.

[0035] According to the above-described configuration, the first flow path can be formed by the first rib and the second rib of the main body housing.

[0036] In one or more embodiments, the main body case can have a first rib protruding from an inner surface of the main body case and opposing a portion of an outer surface of the motor assembly. A first flow path can be provided at a position closer to a radially outer side than the first rib. The cleaner can have a second flow path provided between the motor assembly and the first rib in a radial direction of the rotation shaft, extending in a front-rear direction parallel to the rotation shaft, and through which air discharged from the motor assembly flows. The air discharged from the motor assembly can flow in the second flow path toward the front and, after passing through a front end portion of the first rib, flow in the first flow path toward the rear.

[0037] According to the above-described configuration, the air discharged from the motor assembly flows in the second flow path toward the front and, after passing through the front end portion of the first rib, flows in the first flow path toward the rear. As the flow path of the air discharged from the motor assembly is lengthened, noise generated from the cleaner is suppressed.

[0038] In one or more embodiments, the cleaner can have a first sound deadening member disposed in the first flow path.

[0039] According to the above-described configuration, noise generated from the cleaner is suppressed by the first sound deadening member.

[0040] In one or more embodiments, the first sound deadening member can have a first flow-through hole that penetrates a front surface and a rear surface of the first sound deadening member.

[0041] According to the above-described configuration, the air can flow smoothly toward the rear in the first flow-through hole.

[0042] In one or more embodiments, the first flow-through hole can be provided at a plurality of positions different from each other in the up-down direction and the left-right direction, respectively.

[0043] According to the above-described configuration, the air can flow smoothly toward the rear in each of the plurality of first flow-through holes.

[0044] In one or more embodiments, a dimension of the first sound deadening member in the front-rear direction can be greater than a dimension of the first sound deadening member in the up-down direction and a dimension of the first sound deadening member in the left-right direction.

[0045] According to the above-described configuration, as the length of the first flow-through hole in the front-rear direction is lengthened, noise generated by the air flowing in the first flow-through hole is suppressed.

[0046] In one or more embodiments, the main body housing may have an exhaust port for discharging air flowing through the first flow path. The vacuum cleaner may include a second silencing member disposed inside the main body housing, opposite to the exhaust port. The second silencing member may have a second flow hole penetrating its surface and back surface. The sizes of the first and second flow holes may be different.

[0047] Based on the above configuration, the noise generated by the vacuum cleaner is suppressed by the second silencing component.

[0048] In one or more embodiments, the vacuum cleaner may include a first elastic member that contacts the front end of the motor assembly and the main body housing, respectively.

[0049] According to the above configuration, the first elastic member can suppress the transmission of vibrations from the motor assembly to the main housing. As a result, noise generated by the vacuum cleaner is suppressed.

[0050] In one or more embodiments, the main housing may have a partition wall portion disposed in front of the motor assembly and having a suction port formed therein. At least a portion of the first elastic member may contact the inner surface of the suction port. At least a portion of the first elastic member may contact the rear surface of the partition wall portion.

[0051] According to the above configuration, since at least a portion of the first elastic member contacts the inner surface of the suction port, the radial movement of the motor assembly can be restricted. Since at least a portion of the first elastic member contacts the rear surface of the partition wall, the forward movement of the motor assembly can be restricted.

[0052] In one or more embodiments, the first elastic member may have: an annular large-diameter portion that contacts the rear surface of the partition portion, and an annular small-diameter portion that protrudes forward from the large-diameter portion and contacts the inner surface of the suction port.

[0053] According to the above configuration, since the small-diameter portion of the first elastic member contacts the inner surface of the suction port, the radial movement of the motor assembly can be restricted. Since the large-diameter portion of the first elastic member contacts the rear surface of the partition wall, the forward movement of the motor assembly can be restricted.

[0054] In one or more embodiments, the first elastic member may include: a metal mesh portion, a synthetic resin portion for fixing the metal mesh portion, and a rubber portion for fixing the synthetic resin portion.

[0055] Based on the above configuration, the metal mesh portion disposed at the air vent of the first elastic member can prevent debris from passing through the air vent. The synthetic resin portion ensures the rigidity of the first elastic member. The rubber portion prevents vibrations of the motor assembly from being transmitted to the main body housing, thus suppressing noise generated by the vacuum cleaner.

[0056] In one or more embodiments, the vacuum cleaner may include a second elastic member disposed further rearward than the first elastic member and in contact with the motor assembly and the main body housing, respectively.

[0057] Based on the above configuration, the second elastic member can suppress the transmission of vibrations from the motor assembly to the main housing. This reduces noise generated by the vacuum cleaner.

[0058] In one or more embodiments, the second elastic member may be configured to contact the position in the motor assembly where vibration is minimal when the fan motor is rotating.

[0059] Based on the above configuration, since the second elastic member is in contact with the position of least vibration in the motor assembly, the transmission of vibration from the motor assembly to the main housing can be effectively suppressed. Therefore, noise generated by the vacuum cleaner is effectively suppressed.

[0060] In one or more embodiments, the radially inner end of the second elastic member may contact the motor assembly, and the radially outer end of the second elastic member may be supported on the main housing.

[0061] According to the above configuration, the motor assembly is radially supported by the main housing by means of the second elastic member.

[0062] In one or more embodiments, the second elastic member may contact the outer surfaces of four portions of the middle portion of the motor assembly in the front-rear direction.

[0063] According to the above configuration, the motor assembly is radially supported by the main housing via four second elastic members.

[0064] In one or more embodiments, the second elastic member may have: a main body portion supported on the main body housing, and a support portion having a curved surface that contacts the motor assembly.

[0065] Based on the above configuration, since the contact area between the support and the motor assembly is small, it is possible to effectively suppress the transmission of motor assembly vibrations to the main housing. As a result, noise generated by the vacuum cleaner is effectively suppressed.

[0066] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The constituent elements of the embodiments described below can be appropriately combined. In addition, sometimes some constituent elements are not used.

[0067] In this implementation, the terms "front," "back," "left," "right," "up," and "down" are used to describe the positional relationships of the various parts. These terms indicate the relative position or direction with respect to the center of the vacuum cleaner 1.

[0068] [Overview of Vacuum Cleaners]

[0069] Figure 1 This is a diagram showing the vacuum cleaner 1 and extension tube 101 as described in the embodiment, viewed from the upper right front. Figure 2 This is a diagram showing the vacuum cleaner 1 as described in the embodiment, viewed from the upper right front. Figure 3 This is a diagram showing the vacuum cleaner 1 as described in the embodiment, viewed from the right side. Figure 4 This is a cross-sectional view of the vacuum cleaner 1 according to the embodiment. Figure 5 This is an exploded view of the vacuum cleaner 1 involved in the embodiment, viewed from the upper right front. Figure 6 This is an exploded view of the vacuum cleaner 1 involved in the embodiment, viewed from the upper right front. Figure 7 This is an exploded view of the vacuum cleaner 1 involved in the embodiment, viewed from the upper right front. Figure 8 This is a cross-sectional view of the vacuum cleaner 1 according to the embodiment. Figure 8 Equivalent to Figure 3 A-A line section view.

[0070] In this embodiment, vacuum cleaner 1 is a cyclone vacuum cleaner that uses centrifugal force to separate foreign objects from the air. Vacuum cleaner 1 is a handheld vacuum cleaner that can perform cleaning operations while being held by the user of vacuum cleaner 1.

[0071] Vacuum cleaner 1 includes: a main body assembly 2, a filter assembly 3, and a dust collection assembly 4. An extension tube 101 is connected to the rear end of the main body assembly 2. A suction nozzle 100 is connected to the front end of the extension tube 101. The suction nozzle 100 has a suction inlet. A rotating brush 102 is disposed at the suction inlet of the suction nozzle 100. The rotating brush 102 is rotated by the rotational force generated by an electric motor (not shown) disposed in the suction nozzle 100.

[0072] The main component 2 includes: a main body shell 5, a battery assembly 6, a motor assembly 7, an operation panel 9, and a lamp 10.

[0073] The main housing 5 houses the motor assembly 7. The main housing 5 is formed of synthetic resin. The main housing 5 consists of a pair of half-segmented housings. The main housing 5 includes a left housing 5L and a right housing 5R. The right housing 5R is positioned further to the right than the left housing 5L. The left housing 5L and the right housing 5R are secured by a plurality of screws 5S.

[0074] The main body shell 5 includes: a body part 11, a partition part 16, a handle part 12, a battery holding part 13, and a suction pipe part 34.

[0075] The fuselage section 11 houses the motor assembly 7. The fuselage section 11 is substantially cylindrical. A partition section 16 is disposed at the front of the fuselage section 11. The partition section 16 is plate-shaped. The partition section 16 is configured to cover the opening at the front of the fuselage section 11. The fuselage section 11 and the partition section 16 are integral. A suction port 14 is provided in the partition section 16. The suction port 14 is located in the center of the partition section 16. An exhaust port 15 is provided in the fuselage section 11. The exhaust ports 15 are respectively located on the left and right sides of the fuselage section 11.

[0076] The handle 12 is held by the user of the vacuum cleaner 1. The handle 12 is configured to extend from the upper part of the body 11 toward the rear.

[0077] The battery holding part 13 holds the battery pack 17 by means of the battery mounting part 6. The battery holding part 13 is connected to the rear part of the fuselage part 11 and the lower end of the rear part of the handle part 12.

[0078] The battery assembly section 6 is located at the lower part of the battery holding section 13. The battery pack 17 is assembled in the battery assembly section 6. The battery pack 17 can be installed and removed from the battery assembly section 6.

[0079] The battery pack 17 functions as a power source for the vacuum cleaner 1. When assembled in the battery assembly 6, the battery pack 17 supplies power to the vacuum cleaner 1. The battery pack 17 is a general-purpose battery capable of powering various electrical devices. The battery pack 17 can be used as a power source for power tools. The battery pack 17 can be used as a power source for electrical devices other than power tools. The battery pack 17 can be used as a power source for a vacuum cleaner different from the vacuum cleaner 1 described in this embodiment. The battery pack 17 includes a lithium-ion battery. The battery pack 17 is a rechargeable battery. The battery assembly 6 has a structure equivalent to that of a battery assembly for a power tool.

[0080] The user of vacuum cleaner 1 can perform the operations of assembling the battery pack 17 into the battery assembly section 6 and removing the battery pack 17 from the battery assembly section 6. The battery assembly section 6 includes a guide member for guiding the battery pack 17 and a main body terminal connected to the battery terminals provided on the battery pack 17. The user can assemble the battery pack 17 into the battery assembly section 6 by inserting it from the rear. The battery pack 17 is inserted into the battery assembly section 6 while being guided by the guide member. With the battery pack 17 assembled into the battery assembly section 6, the battery terminals of the battery pack 17 are electrically connected to the main body terminal of the battery assembly section 6. The user of vacuum cleaner 1 can remove the battery pack 17 from the battery assembly section 6 by moving the battery pack 17 rearward.

[0081] The motor assembly 7 generates an attractive force at the suction port 14 of the main housing 5. The motor assembly 7 is housed within the body portion 11 of the main housing 5. The motor assembly 7 includes a fan motor 8 and a control board 20. The rotor of the fan motor 8 and the fan are capable of rotating about a rotation axis AX. The rotation axis AX extends in the front-to-back direction. The fan motor 8 generates power to rotate the fan. This rotation of the fan motor 8 generates an attractive force at the suction port 14. The control board 20 outputs control signals to control the fan motor 8. The control board 20 may have, for example, a field-effect transistor (FET).

[0082] The control panel 9 is operated by the user of the vacuum cleaner 1. The control panel 9 is located on the handle 12. The user of the vacuum cleaner 1 can operate the control panel 9 while holding the handle 12. In this embodiment, the control panel 9 includes a mode switch button 9A, a drive button 9B, and a display unit 9C. The mode switch button 9A and the drive button 9B are operated by the user. The user can operate the mode switch button 9A and the drive button 9B while holding the handle 12.

[0083] When fan motor 8 stops, operating the drive button 9B will start fan motor 8. While fan motor 8 is running, operating the drive mode switch button 9A will adjust the fan motor 8 speed in, for example, four levels. Operating the drive mode switch button 9A once will change the fan motor 8 speed from speed 1 to speed 2; operating it again will change it from speed 2 to speed 3; operating it a third time will change it from speed 3 to speed 4; and operating it a third time will return the fan motor 8 speed to speed 1. Changing the fan motor 8 speed changes the suction force at suction port 14. When fan motor 8 is running, operating the drive button 9B will stop fan motor 8.

[0084] The display unit 9C has four light-emitting units. Examples of these light-emitting units are light-emitting diodes (LEDs). When the fan motor 8 is driven at its first rotational speed, one light-emitting unit is illuminated. When the fan motor 8 is driven at its second rotational speed, two light-emitting units are illuminated. When the fan motor 8 is driven at its third rotational speed, three light-emitting units are illuminated. When the fan motor 8 is driven at its fourth rotational speed, all four light-emitting units are illuminated. When the fan motor 8 stops, all four light-emitting units are turned off.

[0085] The lamp 10 is located at the front of the handle 12. The lamp 10 illuminates the front of the vacuum cleaner 1. The lamp 10 includes a light-emitting element such as a light-emitting diode (LED).

[0086] The rear end of the extension tube 101 is inserted into the opening at the front end of the suction tube 34. A locking mechanism 36 is provided at the front end of the suction tube 34. The suction tube 34 and the extension tube 101 are fixed by the locking mechanism 36. By releasing the fixation based on the locking mechanism 36, the extension tube 101 can be detached from the suction tube 34. The extension tube can be attached to and detached from the suction tube 34.

[0087] By inserting the rear end of the extension tube 101 into the opening at the front end of the suction tube 34, the power supply terminal 34C of the suction tube 34 and the power receiving terminal of the extension tube 101 are connected. Through this connection, power from the battery pack 17 is supplied to the electric motor located in the suction nozzle 100 via the power supply terminal 34C of the suction tube 34 and the power receiving terminal of the extension tube 101. Operating the drive button 9B causes the fan motor 8 to rotate, and the electric motor located in the suction nozzle 100 rotates synchronously with the fan motor 8. The rotation of the electric motor in the suction nozzle 100 causes the rotating brush 102 to rotate.

[0088] like Figure 4 As shown, at least a portion of the filter assembly 3 is positioned further forward than the main body assembly 2. The filter assembly 3 is configured to face the suction port 14 of the main body assembly 2. The filter assembly 3 includes a support frame 18 and a filter 19. The support frame 18 supports the filter 19. The filter 19 is positioned further forward than the suction port 14 of the main body assembly 2. The filter 19 is breathable. The filter 19 recovers foreign matter from the air passing through it. Air flows into the filter 19 from the front. Foreign matter contained in the air is captured by the filter 19. After exiting through an opening at the rear of the filter 19, the air flowing through it enters the suction port 14.

[0089] At least a portion of the dust collection assembly 4 is positioned further forward than the filter assembly 3. The dust collection assembly 4 includes a cyclone housing 30 and a cyclone dust collection unit 40. The cyclone dust collection unit 40 includes a filter unit 50 and a dust collection cup 42.

[0090] The cyclone housing 30 is connected to the body 11. The filter assembly 3 is housed in the rear of the cyclone housing 30. A locking mechanism 37 is provided at the rear end of the cyclone housing 30. Figure 5 as well as Figure 7 As shown, a recess 11R is provided at the front end of the fuselage 11. A locking mechanism 37 is provided at the lower part of the rear end of the cyclone housing 30. The recess 11R is provided at the lower part of the front end of the fuselage 11. The locking mechanism 37 has a hook portion that hooks onto the recess 11R and an operating lever that moves the hook portion. The fuselage 11 and the cyclone housing 30 are fixed by the hook portion of the locking mechanism 37 hooking onto the recess 11R. By operating the operating lever, the fixing based on the locking mechanism 37 is released, thereby detaching the cyclone housing 30 from the fuselage 11. The cyclone housing 30 can be attached to and detached from the fuselage 11.

[0091] The dust collection cup 42 is connected to the cyclone housing 30. A locking mechanism 44 is provided at the rear end of the dust collection cup 42.Figure 6 as well as Figure 7 As shown, a recess 30R is provided at the front end of the cyclone housing 30. Locking mechanisms 44 are respectively provided on the left and right sides of the rear end of the dust collection cup 42. The recesses 30R are respectively provided on the left and right sides of the front end of the cyclone housing 30. The locking mechanism 44 has a hook portion that hooks onto the recess 30R, and an operating lever that moves the hook portion. The cyclone housing 30 and the dust collection cup 42 are fixed by the hook portion of the locking mechanism 44 hooking onto the recess 30R. By operating the operating lever, the fixing based on the locking mechanism 44 is released, thereby detaching the dust collection cup 42 from the cyclone housing 30. The dust collection cup 42 can be detached from the cyclone housing 30.

[0092] like Figure 5 As shown, with the cyclone casing 30 and dust collection cup 42 fixed, the cyclone casing 30 can be detached from the body 11. Figure 6 As shown, with the main body 11 and the cyclone casing 30 fixed, the dust collection cup 42 can be detached from the cyclone casing 30. Figure 7 As shown, with the cyclone housing 30 removed from the body 11, the dust collection cup 42 can be removed from the cyclone housing 30.

[0093] The cyclone casing 30 and the suction pipe portion 34 of the main casing 5 are arranged side by side. The dust collection cup 42 is arranged side by side with the suction pipe portion 34 of the main casing 5. The cyclone casing 30 is positioned further forward than the suction port 14 of the main casing 5. The dust collection cup 42 is positioned further forward than both the suction port 14 of the main casing 5 and the cyclone casing 30. The suction pipe portion 34 and the cyclone casing 30 are arranged vertically. The suction pipe portion 34 and the dust collection cup 42 are arranged vertically. The cyclone casing 30 and the dust collection cup 42 are positioned further downward than the suction pipe portion 34.

[0094] Air supplied to the suction port 14 of the main body casing 5 flows within the internal flow path of the suction pipe 34. For example... Figure 5 as well as Figure 7 As shown, an outlet 33 is provided at the rear of the suction pipe 34. The outlet 33 faces downward. An inlet 35 is provided at the upper part of the cyclone casing 30. The inlet 35 faces upward. With the body 11 of the main casing 5 and the cyclone casing 30 connected, the outlet 33 and the inlet 35 are connected together. The filter assembly 3 is housed in the rear of the cyclone casing 30, which is further rearward than the outlet 33 and the inlet 35.

[0095] Air flowing through the internal flow path of the suction pipe 34 enters the internal space of the cyclone housing 30 via the outlet 33 and the inlet 35. The internal space of the cyclone housing 30 is connected to the internal space of the dust collection cup 42. The air flowing into the internal space of the cyclone housing 30 is converted into a swirling flow by a swirling component (not shown) and then flows into the internal space of the dust collection cup 42.

[0096] The rear of the filter unit 50 is located inside the cyclone housing 30. The front of the filter unit 50 is located inside the dust collection cup 42. Air flowing from the cyclone housing 30 into the dust collection cup 42 swirls around the filter unit 50. Air inside the dust collection cup 42 passes through the filter unit 50 and is then discharged from the dust collection cup 42.

[0097] The filter unit 50 includes a pre-filter 51, a noise-reducing component 52, and a post-filter 53. The noise-reducing component 52 is disposed around the post-filter 53. At least a portion of the pre-filter 51 is disposed around the noise-reducing component 52.

[0098] Air flowing from the cyclone casing 30 into the dust collection cup 42 flows from the outside to the inside of the filter unit 50. Air passing through the pre-filter 51 flows to the silencer 52. Air passing through the silencer 52 flows to the post-filter 53.

[0099] The post-filter 53 is made of synthetic resin. In this embodiment, the post-filter 53 is made of ABS resin. The post-filter 53 has a filter cylindrical portion having a plurality of holes. The holes in the filter cylindrical portion are formed to penetrate both the inner and outer surfaces of the filter cylindrical portion.

[0100] The noise-reducing component 52 is disposed around the filter cylindrical portion of the post-filter 53. The noise-reducing component 52 includes a cylindrical sponge component. The sponge component is made of polyurethane resin. The sponge component is a porous component that allows air to pass through.

[0101] At least a portion of the pre-filter 51 is disposed around the silencer 52. The pre-filter 51 includes a cylindrical mesh component. The mesh component is disposed around the silencer 52. The mesh component is made of nylon resin. The mesh component has a plurality of holes for air to pass through.

[0102] like Figure 4 As shown, a support plate portion 31 is provided in front of the filter assembly 3 in the cyclone housing 30. An opening 32 is provided in the center of the support plate portion 31. The rear end of the post-filter 53 is inserted into the opening 32. The filter unit 50 can be detached from the support plate portion 31 of the cyclone housing 30.

[0103] An outlet is provided at the rear end of the post-filter 53. The rear end of the post-filter 53 is disposed at the opening 32. The space inside the post-filter 53 and the space surrounding the filter assembly 3 are connected via the opening 32. The fan motor 8 can generate suction in the filter unit 50. When the fan motor 8 is driven and generates suction at the suction port 14, suction is generated at the opening 32 via the filter assembly 3 housed in the internal space of the cyclone housing 30. By generating suction at the opening 32, the space inside the post-filter 53 becomes negative pressure, and suction is generated in the filter unit 50. Because the space inside the post-filter 53 becomes negative pressure, air flows from the space surrounding the filter unit 50 to the space inside the post-filter 53. The air surrounding the filter unit 50 passes through the pre-filter 51, then through the silencer 52, and then through the post-filter 53, flowing into the space inside the post-filter 53. Air flowing into the space inside the post-filter 53 flows out from the outlet at the rear end of the post-filter 53 and is supplied to the filter assembly 3. Air passing through the filter assembly 3 flows into the motor assembly 7 from the suction port 14.

[0104] [Motor assembly]

[0105] Figure 9 This is a diagram showing a portion of the vacuum cleaner 1 involved in the embodiment, viewed from the upper right front. Figure 9 This is a diagram showing a portion of the vacuum cleaner 1 with the right outer casing 5R removed. (See diagram.) Figure 9 As shown, the vacuum cleaner 1 has: a motor assembly 7, a first elastic member 71 that contacts the front end of the motor assembly 7, a second elastic member 72 that contacts the middle part of the motor assembly 7 in the front-rear direction, and a third elastic member 73 that contacts the rear end of the motor assembly 7.

[0106] Figure 10 This is a diagram showing the motor assembly 7, the first elastic member 71, the second elastic member 72, and the third elastic member 73 as described in the embodiment, viewed from the upper right front. Figure 10 This diagram shows the states in which the first elastic member 71, the second elastic member 72, and the third elastic member 73 are in contact with the motor assembly 7. Figure 11 This is a diagram showing the motor assembly 7, the first elastic member 71, the second elastic member 72, and the third elastic member 73 as described in the embodiment, viewed from the upper right front. Figure 11 This diagram shows the state in which the first elastic member 71, the second elastic member 72, and the third elastic member 73 have separated from the motor assembly 7.

[0107] The motor assembly 7 includes a motor housing 22, a fan shroud 24, and a control board 20. The motor housing 22 houses the fan motor 8. The fan shroud 24 is fixed to the front of the motor housing 22. In the fan motor 8, the fan is positioned further forward than the motor. The fan shroud 24 is configured to cover the fan.

[0108] The motor housing 22 has a cylindrical portion 23 and feet 26. The cylindrical portion 23 is configured to surround the rotating shaft AX. The cylindrical portion 23 is configured to surround the fan motor 8. The feet 26 support the control board 20. The feet 26 are configured to protrude rearward from the rear end of the cylindrical portion 23. Two feet 26 are provided. The two feet 26 are positioned radially opposite each other. The rear portion of the feet 26 is positioned radially outward from the outer surface of the cylindrical portion 23.

[0109] The fan cover 24 includes a cylindrical portion 24A, a hook portion 24B, a plate portion 24C, and ribs 24D. The cylindrical portion 24A is configured to surround the rotation shaft AX. The cylindrical portion 24A is positioned around the front portion of the cylindrical portion 23. The hook portion 24B hooks onto a claw portion 23A provided on the outer surface of the cylindrical portion 23. The fan cover 24 is fixed to the motor housing 22 by hooking the hook portion 24B onto the claw portion 23A. The plate portion 24C is formed to cover the opening at the front end of the cylindrical portion 24A. The plate portion 24C is formed inside the front end of the cylindrical portion 24A. The plate portion 24C is substantially circular in shape. Multiple ribs 24D are formed between the plate portion 24C and the front end of the inner surface of the cylindrical portion 24A. The ribs 24D connect the cylindrical portion 24A and the plate portion 24C. Multiple ribs 24D are spaced apart in the circumferential direction of the rotation shaft AX. The ribs 24D ensure the rigidity of the fan shroud 24, thus preventing a decrease in the strength of the fan shroud 24 and suppressing its deformation.

[0110] The motor assembly 7 has an air inlet 22A and an exhaust outlet 22B. The air inlet 22A is located at the front end of the motor assembly 7. The exhaust outlet 22B is located further rearward than the air inlet 22A. The air inlet 22A is located on the fan shroud 24. The air inlet 22A is located at the center of the plate portion 24C of the fan shroud 24. The air inlet 22A is substantially circular in shape. The center of the air inlet 22A is substantially aligned with the rotation axis AX. The exhaust outlet 22B is located at the rear end of the cylinder portion 23. The exhaust outlet 22B is located between the rear end of the outer surface of the fan motor 8 and the rear end of the inner surface of the cylinder portion 23. A housing flow path 68 is provided between the outer surface of the fan motor 8 and the inner surface of the cylinder portion 23. Air flowing into the interior of the motor assembly 7 (motor housing 22) from the air inlet 22A flows rearward in the housing flow path 68 and is then exhausted from the exhaust outlet 22B.

[0111] The control board 20 outputs control signals to control the fan motor 8. The control board 20 is supported on the feet 26. The control board 20 is positioned between the two feet 26.

[0112] The first elastic member 71 contacts the front end of the motor assembly 7 and the main housing 5, respectively. At least a portion of the first elastic member 71 contacts the fan shroud 24. The first elastic member 71 is disposed at the front end of the fan shroud 24. The main housing 5 has a partition 16 disposed in front of the motor assembly 7. A suction port 14 is formed in the partition 16. At least a portion of the first elastic member 71 contacts the inner surface of the suction port 14. At least a portion of the first elastic member 71 contacts the rear surface of the partition 16.

[0113] The first elastic member 71 has an annular large-diameter portion 71A and an annular small-diameter portion 71B protruding forward from the large-diameter portion 71A. Both the large-diameter portion 71A and the small-diameter portion 71B are annular. The large-diameter portion 71A and the small-diameter portion 71B are respectively disposed around the rotation axis AX. The center of the large-diameter portion 71A and the center of the small-diameter portion 71B are substantially aligned with the rotation axis AX. In the radial direction of the rotation axis AX, the size (diameter) of the large-diameter portion 71A is larger than the size (diameter) of the small-diameter portion 71B. The front surface of the large-diameter portion 71A contacts the rear surface of the partition wall portion 16. The small-diameter portion 71B is disposed at the suction port 14. The outer surface of the small-diameter portion 71B contacts the inner surface of the suction port 14.

[0114] The first elastic member 71 has a vent 71C. The vent 71C is configured to penetrate the front surface of the small-diameter portion 71B and the rear surface of the large-diameter portion 71A. The vent 71C includes an inner space of the annular large-diameter portion 71A and an inner space of the annular small-diameter portion 71B. When the fan motor 8 rotates, air surrounding the filter assembly 3 flows into the air inlet 22A of the motor assembly 7 through the vent 71C.

[0115] When the fan motor 8 rotates, creating a negative pressure inside the cyclone casing 30, the motor assembly 7 moves forward. Because the front surface of the large-diameter portion 71A contacts the rear surface of the partition wall portion 16, the forward movement of the motor assembly 7 is limited. Because the small-diameter portion 71B is disposed at the suction port 14, the radial movement of the motor assembly 7 is limited. The circumferential movement of the motor assembly 7 is limited by the frictional force between the front surface of the large-diameter portion 71A and the rear surface of the partition wall portion 16, and the frictional force between the outer surface of the small-diameter portion 71B and the inner surface of the suction port 14.

[0116] Figure 12This is a cross-sectional view of the first elastic member 71 of the vacuum cleaner according to the embodiment, viewed from the upper right front. In the embodiment, the first elastic member 71 includes: a metal mesh portion 711, a synthetic resin portion 712 for fixing the metal mesh portion 711, and a rubber portion 713 for fixing the synthetic resin portion 712. The synthetic resin portion 712 is configured to surround the vent 71C. The rubber portion 713 is configured to surround the vent 71C. At least a portion of the rubber portion 713 is configured to surround the synthetic resin portion 712. At least a portion of the rubber portion 713 is positioned further radially outward than the synthetic resin portion 712. The front portion of the inner peripheral surface of the vent 71C is formed by the inner peripheral surface of the synthetic resin portion 712. The rear portion of the inner peripheral surface of the vent 71C is formed by the inner peripheral surface of the rubber portion 713. The majority of the surface of the first elastic member 71 is the surface of the rubber portion 713. The rear surface, outer peripheral surface, and front surface of the large-diameter portion 71A, as well as the outer peripheral surface of the small-diameter portion 71B, are each formed by the surface of the rubber portion 713. The front surface of the small-diameter portion 71B includes the surface of the synthetic resin portion 712 and the surface of the rubber portion 713. The front surface of the small-diameter portion 71B is annular. The peripheral portion of the front surface of the small-diameter portion 71B is formed by the surface of the rubber portion 713. In a region of the front surface of the small-diameter portion 71B that is radially inward than the surface of the rubber portion 713, the surface of the synthetic resin portion 712 is formed. The metal mesh portion 711 is fixed to the synthetic resin portion 712. At least a portion of the metal mesh portion 711 is disposed at the vent 71C. The synthetic resin portion 712 is disposed around the metal mesh portion 711, for example, by insert molding.

[0117] The second elastic member 72 is positioned further rearward than the first elastic member 71. The second elastic member 72 is made of rubber. The second elastic member 72 contacts both the motor assembly 7 and the main housing 5. At least a portion of the second elastic member 72 contacts the middle portion of the cylindrical portion 23 of the motor housing 22 in the front-rear direction. At least a portion of the second elastic member 72 contacts the inner surface of the fuselage portion 11.

[0118] The second elastic member 72 is configured to contact the position in the motor assembly 7 where vibration is minimal when the fan motor 8 rotates. The position in the motor assembly 7 where vibration is minimal can be determined, for example, through preliminary experiments or simulations. In this embodiment, the position in the motor assembly 7 where vibration is minimal is the middle portion of the cylindrical portion 23 in the front-to-back direction.

[0119] The second elastic member 72 supports the outer surface of the cylindrical portion 23 of the motor housing 22 from the radially outer side. The radially inner end of the second elastic member 72 contacts the outer surface of the cylindrical portion 23 of the motor housing 22. The radially outer end of the second elastic member 72 is supported by the body portion 11 of the main body shell 5.

[0120] In this embodiment, the second elastic member 72 contacts the outer surface of four portions of the middle portion of the cylindrical portion 23 in the front-rear direction. Four second elastic members 72 are provided. In the front-rear direction, the positions of the four second elastic members 72 are equidistant from each other. The first second elastic member 72 supports the upper left portion of the outer surface of the cylindrical portion 23. The second second elastic member 72 supports the lower left portion of the outer surface of the cylindrical portion 23. The third second elastic member 72 supports the upper right portion of the outer surface of the cylindrical portion 23. The fourth second elastic member 72 supports the lower right portion of the outer surface of the cylindrical portion 23.

[0121] The second elastic member 72 has a main body portion 72A supported on the main body housing 5 and a support portion 72B that contacts the motor assembly 7. The main body portion 72A is supported by a retaining rib 29 provided on the inner surface of the fuselage portion 11 (see reference). Figure 8 The support portion 72B is positioned radially inward than the main body portion 72A. The surface of the support portion 72B is curved. At least a portion of the surface of the support portion 72B is spherical. The support portion 72B contacts the outer surface of the cylindrical portion 23 of the motor housing 22. The support portion 72B is substantially in point contact with the outer surface of the cylindrical portion 23. The cylindrical portion 23 is supported by four support portions 72B. The four support members 72B restrict at least radial movement of the motor assembly 7.

[0122] The third elastic member 73 is positioned further rearward than the second elastic member 72. The third elastic member 73 contacts the motor assembly 7. In this embodiment, the third elastic member 73 is disposed on the foot 26 of the motor housing 22. The third elastic member 73 has a recess 73A for the rear portion of the foot 26 to be inserted. Two third elastic members 73 are provided, each disposed on one of the two feet 26.

[0123] [flow path]

[0124] Figure 13 This is a diagram showing a portion of the vacuum cleaner 1 according to the embodiment as viewed from the right. Figure 14 This is a diagram showing a portion of the vacuum cleaner 1 involved in the embodiment, viewed from the right rear. Figure 13 as well as Figure 14 These are images showing a portion of the vacuum cleaner 1 with the right outer casing 5R removed.

[0125] The vacuum cleaner 1 has an inner flow path 66 (second flow path) for airflow from the motor assembly 7, and an outer flow path 60 (first flow path) for airflow from the motor assembly 7. The outer flow path 60 is positioned radially outward than the inner flow path 66. The inner flow path 66 and the outer flow path 60 are arranged side by side.

[0126] An outer flow path 60 is provided radially along the rotation shaft AX between the outer surface of the motor assembly 7 (motor housing 22) and the inner surface of the body portion 11 of the main housing 5. The outer flow path 60 is only provided in a portion of the circumferential direction of the rotation shaft AX. The outer flow path 60 extends in a front-to-back direction parallel to the rotation shaft AX. Air discharged from the exhaust port 22B of the motor assembly 7 flows through the outer flow path 60.

[0127] The outer flow path 60 is disposed on one or both of the upper and lower sides of the motor assembly 7. In the embodiment, the outer flow path 60 is disposed on the upper side and the lower side of the motor assembly 7, respectively. In the following description, the outer flow path 60 disposed on the upper side of the motor assembly 7 is appropriately referred to as the upper outer flow path 60A, and the outer flow path 60 disposed on the lower side of the motor assembly 7 is appropriately referred to as the lower outer flow path 60B.

[0128] The main body housing 5 has a first rib 27 protruding from the inner surface of the fuselage portion 11 of the main body housing 5, and a second rib 28 protruding from the inner surface of the fuselage portion 11 of the main body housing 5. The first rib 27 is opposite to a portion of the outer surface of the motor assembly 7. The first rib 27 is opposite to a portion of the outer surface of the motor housing 22. The second rib 28 is positioned radially outward than the first rib 27. At least a portion of the first rib 27 and the second rib 28 are positioned in the same position in the front-rear direction. At least a portion of the first rib 27 and the second rib 28 are positioned in the same position in the left-right direction. The first rib 27 and the second rib 28 are opposite to each other in the vertical direction.

[0129] like Figure 8 As shown, the first rib 27 is respectively provided on the left outer shell 5L and the right outer shell 5R. The first rib 27 of the left outer shell 5L and the first rib 27 of the right outer shell 5R are connected together. The first rib 27 of the left outer shell 5L protrudes to the right from the inner surface (right surface) of the left outer shell 5L. The first rib 27 of the right outer shell 5R protrudes to the left from the inner surface (left surface) of the right outer shell 5R. The right end of the first rib 27 of the left outer shell 5L and the left end of the first rib 27 of the right outer shell 5R are connected together.

[0130] like Figure 8 As shown, the second rib 28 is respectively provided on the left outer shell 5L and the right outer shell 5R. The second rib 28 of the left outer shell 5L and the second rib 28 of the right outer shell 5R are connected together. The second rib 28 of the left outer shell 5L protrudes to the right from the inner surface (right surface) of the left outer shell 5L. The second rib 28 of the right outer shell 5R protrudes to the left from the inner surface (left surface) of the right outer shell 5R. The right end of the second rib 28 of the left outer shell 5L and the left end of the second rib 28 of the right outer shell 5R are connected together.

[0131] The first rib 27 is disposed above and below the motor assembly 7. In the following description, the first rib 27 disposed above the motor assembly 7 shall be appropriately referred to as the first upper rib 27A, and the first rib 27 disposed below the motor assembly 7 shall be appropriately referred to as the first lower rib 27B.

[0132] The second rib 28 is disposed above and below the motor assembly 7. In the following description, the second rib 28 disposed above the motor assembly 7 is appropriately referred to as the second upper rib 28A, and the second rib 28 disposed below the motor assembly 7 is appropriately referred to as the second lower rib 28B.

[0133] The outer flow path 60 is located radially outward from the first rib 27. The outer flow path 60 is located between the first rib 27 and the second rib 28. The outer flow path 60 is defined by the first rib 27, the second rib 28, and the inner surface of the fuselage section 11. The outer upper flow path 60A is defined by the upper surface of the first upper rib 27A, the lower surface of the second upper rib 28A, and the inner surface of the fuselage section 11. The outer lower flow path 60B is defined by the lower surface of the first lower rib 27B, the upper surface of the second lower rib 28B, and the inner surface of the fuselage section 11.

[0134] In this embodiment, the front end of the second rib 28 is connected to the rear surface of the partition wall portion 16. The front end of the first rib 27 is positioned further rearward than the partition wall portion 16. The front end of the first rib 27 separates from the partition wall portion 16. The rear portion of the first upper rib 27A curves downward. The rear portion of the first lower rib 27B curves upward. The rear ends of the first upper rib 27A and the first lower rib 27B are connected together. The rear ends of the first upper rib 27A and the first lower rib 27B are connected at a position further rearward than the motor assembly 7.

[0135] An inner flow path 66 is provided radially along the rotation shaft AX between the outer surface of the motor assembly 7 and the first rib 27. The inner flow path 66 may be provided only in a portion of the circumferential direction of the rotation shaft AX, or it may be provided along the entire circumferential direction of the rotation shaft AX. The inner flow path 66 extends in a front-to-back direction parallel to the rotation shaft AX. Air discharged from the exhaust port 22B of the motor assembly 7 flows through the inner flow path 66.

[0136] In this embodiment, the inner flow paths 66 are respectively provided above and below the motor assembly 7. In the following description, the inner flow path 66 provided above the motor assembly 7 is appropriately referred to as the inner upper flow path 66A, and the inner flow path 66 provided below the motor assembly 7 is appropriately referred to as the inner lower flow path 66B.

[0137] The inner upper flow path 66A is defined by the upper part of the outer surface of the cylinder 23, the lower surface of the first upper rib 27A, and the inner surface of the fuselage 11. The inner lower flow path 66B is defined by the lower part of the outer surface of the cylinder 23, the upper surface of the first lower rib 27B, and the inner surface of the fuselage 11.

[0138] An exhaust space 61 is provided inside the fuselage section 11, located further rearward than the outer flow path 60. The exhaust space 61 is positioned further rearward than the first rib 27. As described above, the rear ends of the first upper rib 27A and the first lower rib 27B are connected further rearward than the motor assembly 7. The assembly space where the motor assembly 7 is located further forward than the rear ends of the first upper rib 27A and the first lower rib 27B, and the exhaust space 61 located further rearward than the rear ends of the first upper rib 27A and the first lower rib 27B, are divided by the rear ends of the first upper rib 27A and the first lower rib 27B. The assembly space includes, in the vertical direction, the space between the first upper rib 27A and the first lower rib 27B. The component space is the space inside the first rib 27, defined by the first upper rib 27A and the first lower rib 27B. Air in the component space does not flow out to the exhaust space 61 via the rear ends of the first upper rib 27A and the first lower rib 27B. Similarly, air in the exhaust space 61 does not flow out to the component space via the rear ends of the first upper rib 27A and the first lower rib 27B. In other words, air does not flow directly between the component space and the exhaust space 61.

[0139] The rear end of the outer flow path 60 is connected to the exhaust space 61. Air flowing through the outer flow path 60 flows into the exhaust space 61. The rear ends of the outer upper flow path 60A and the outer lower flow path 60B are respectively connected to the exhaust space 61. Air flowing through the outer upper flow path 60A and air flowing through the outer lower flow path 60B merge in the exhaust space 61.

[0140] like Figure 8 As shown, the main housing 5 has retaining ribs 29 protruding from the inner surface of the fuselage portion 11 of the main housing 5. The retaining ribs 29 are respectively provided on the left housing 5L and the right housing 5R. The retaining rib 29 of the left housing 5L protrudes to the right from the inner surface (right surface) of the left housing 5L. The retaining rib 29 of the right housing 5R protrudes to the left from the inner surface (left surface) of the right housing 5R.

[0141] The retaining rib 29 is opposite to the first rib 27. The retaining rib 29 includes: a retaining upper rib 29A opposite to the lower surface of the first upper rib 27A, and a retaining lower rib 29B opposite to the upper surface of the first lower rib 27B. The retaining upper rib 29A is positioned further downward than the first upper rib 27A. The retaining lower rib 29B is positioned further upward than the first lower rib 27B.

[0142] The main body 72A of the second elastic member 72 is inserted between the first rib 27 and the retaining rib 29. The main body 72A of the second elastic member 72, located at the upper left of the motor assembly 7, is held by the first upper rib 27A and the retaining upper rib 29A of the left housing 5L. The main body 72A of the second elastic member 72, located at the lower left of the motor assembly 7, is held by the first lower rib 27B and the retaining lower rib 29B of the left housing 5L. The main body 72A of the second elastic member 72, located at the upper right of the motor assembly 7, is held by the first upper rib 27A and the retaining upper rib 29A of the right housing 5R. The main body 72A of the second elastic member 72, located at the lower right of the motor assembly 7, is held by the first lower rib 27B and the retaining lower rib 29B of the right housing 5R.

[0143] The vacuum cleaner 1 includes a first noise-reducing component 62 disposed on the outer flow path 60. The first noise-reducing component 62 is a porous component with continuous air bubbles. The first noise-reducing component 62 absorbs sound transmitted through the air to suppress noise generation.

[0144] The first muffler component 62 is substantially rectangular in shape. The front-to-back dimension of the first muffler component 62 is greater than its vertical dimension and horizontal dimension. That is, the first muffler component 62 is a rectangular prism that is longer in the front-to-back direction.

[0145] The first noise-reducing component 62 has a first flow hole 621 penetrating both its front and rear surfaces. The first flow holes 621 are provided at multiple different locations in both the vertical and horizontal directions of the first noise-reducing component 62. In one embodiment, five first flow holes 621 are provided on one first noise-reducing component 62. The first flow holes 621 extend along the front-rear direction. The five first flow holes 621 are parallel to each other.

[0146] The first silencing component 62 is disposed on the outer upper flow path 60A and the outer lower flow path 60B respectively. In the following description, the first silencing component 62 disposed on the outer upper flow path 60A is appropriately referred to as the first upper silencing component 62A, and the first silencing component 62 disposed on the outer lower flow path 60B is appropriately referred to as the first lower silencing component 62B.

[0147] Two first silencing components 62 are arranged along the left-right direction on the outer flow path 60. The right surface of the left first silencing component 62 contacts the left surface of the right first silencing component 62. Two first upper silencing components 62A are arranged along the left-right direction on the outer upper flow path 60A. Two first lower silencing components 62B are arranged along the left-right direction on the outer lower flow path 60B.

[0148] The vacuum cleaner 1 includes a second noise-absorbing component 64 disposed on the inner side of the main body shell 5 opposite to the exhaust port 15. The second noise-absorbing component 64 is a porous component with continuous air bubbles. The second noise-absorbing component 64 absorbs sound transmitted through the air to suppress noise generation.

[0149] The exhaust port 15 faces the exhaust space 61. Air flowing through the outer flow path 60 is discharged from the exhaust port 15. The second muffler 64 is disposed in the exhaust space 61.

[0150] The second muffler component 64 is essentially plate-shaped. The left-right dimension of the second muffler component 64 is smaller than the up-down dimension and the front-back dimension of the second muffler component 64.

[0151] The second noise-reducing component 64 is positioned opposite to the exhaust port 15 located on the left side of the fuselage 11 and the exhaust port 15 located on the right side of the fuselage 11, respectively. The second noise-reducing component 64 has a surface facing the center of the internal space of the fuselage 11 and a back surface opposite to the exhaust port 15.

[0152] The second muffler 64 has a second flow hole 641 penetrating both its surface and back surface. The second flow holes 641 are provided at multiple different locations in the vertical and horizontal directions and the front-back direction of the second muffler 64. In this embodiment, one second muffler 64 has more second flow holes 641 than the number (5) of first flow holes 621 provided in one first muffler 62.

[0153] The size (flow path cross-sectional area) of a first flow-through orifice 621 is different from the size (flow path cross-sectional area) of a second flow-through orifice 641. In this embodiment, the size of the first flow-through orifice 621 is smaller than the size of the second flow-through orifice 641.

[0154] [How to use]

[0155] Next, the method of using the vacuum cleaner 1 will be explained. When the drive button 9B is operated to start the rotation of the fan motor 8, a suction force is generated at the suction port 14. By generating a suction force at the suction port 14, a suction force is generated at the suction port of the suction nozzle 100. The air drawn in from the suction port of the suction nozzle 100 flows through the internal flow path of the extension tube 101 and then flows into the internal flow path of the suction tube section 34 from the opening at the front end of the suction tube section 34. The air flowing through the internal flow path of the suction tube section 34 flows into the internal space of the cyclone housing 30 through the outlet 33 of the suction tube section 34 and the inlet 35 of the cyclone housing 30. The air flowing into the internal space of the cyclone housing 30 flows into the internal space of the dust collection cup 42 after passing through the cyclone member (not shown).

[0156] Air flowing into the interior space of the dust collection cup 42 swirls within the cup. Inside the dust collection cup 42, air and debris are separated by centrifugal force. Debris accumulates at the front end of the interior space of the dust collection cup 42. The air separated from the debris flows from the outside to the inside of the filter unit 50.

[0157] Air flowing from the space surrounding the filter unit 50 into the space inside the post-filter 53 flows out through the outlet at the rear end of the post-filter 53 and is supplied to the filter assembly 3. Air passing through the filter assembly 3 then passes through the vent 71C of the first elastic member 71 located in the suction port 14. Air passing through the vent 71C flows into the air inlet 22A of the motor assembly 7. The air flowing into the air inlet 22A flows rearward through the housing flow path 68 between the outer surface of the fan motor 8 and the inner surface of the cylinder 23, and then is discharged from the exhaust port 22B of the motor assembly 7.

[0158] Air discharged from the exhaust port 22B of the motor assembly 7 is supplied to the inner flow path 66 between the outer surface of the motor assembly 7 and the first rib 27. Air discharged from the exhaust port 22B of the motor assembly 7 flows into the inner flow path 66 from its rear end. As described above, air does not flow directly between the assembly space and the exhaust space 61. After colliding with the front surface of the rear portion of the first rib 27, which is positioned further rearward than the motor assembly 7, the air discharged from the exhaust port 22B of the motor assembly 7 flows into the inner flow path 66 from its rear end.

[0159] Air discharged from the exhaust port 22B of the motor assembly 7 flows into the inner upper flow path 66A and the inner lower flow path 66B respectively. Air discharged from the exhaust port 22B of the motor assembly 7 and flowing into the inner flow path 66 from the rear end of the inner flow path 66 flows forward in the inner flow path 66. After the air flowing forward in the inner flow path 66 passes through the front end of the first rib 27, it flows into the outer flow path 60 from the front end of the outer flow path 60.

[0160] As described above, the front end of the first rib 27 is positioned further rearward than the partition wall 16, separating it from the partition wall 16. The front ends of the inner flow path 66 and the outer flow path 60 are connected via the space between the front end of the first rib 27 and the rear surface of the partition wall 16. The first elastic member 71 contacts (closely contacts) the partition wall 16. Thus, air flowing out from the front end of the inner flow path 66 can flow into the outer flow path 60 from the front end of the outer flow path 60.

[0161] Air flowing through the inner upper flow path 66A passes through the front end of the first upper rib 27A and then flows into the outer upper flow path 60A. Air flowing through the inner lower flow path 66B passes through the front end of the first lower rib 27B and then flows into the outer lower flow path 60B.

[0162] Air flowing out from the front end of the inner flow path 66 and flowing into the outer flow path 60 from the front end of the outer flow path 60 flows rearward in the outer flow path 60. In an embodiment, the first silencing member 62 is disposed in the outer flow path 60. Air flows in the first flow hole 621 of the first silencing member 62. Air flows rearward in the first flow hole 621 of the first silencing member 62. In an embodiment, the rearward flow of air in the outer flow path 60 includes: air flowing rearward in the first flow hole 621.

[0163] The rear end of the outer flow path 60 (the rear end of the first flow hole 621) is connected to the exhaust space 61. Air flowing through the outer flow path 60 flows into the exhaust space 61. The rear ends of the outer upper flow path 60A (the rear end of the first flow hole 621 of the first upper muffler 62A) and the rear ends of the outer lower flow path 60B (the rear end of the first flow hole 621 of the first lower muffler 62B) are respectively connected to the exhaust space 61. Air flowing through the outer upper flow path 60A and air flowing through the outer lower flow path 60B merge in the exhaust space 61.

[0164] Air flowing into the exhaust space 61 from the outer flow path 60 is discharged from the exhaust port 15 facing the exhaust space 61 toward the outside of the main body housing 5. In this embodiment, a second muffler 64 is disposed on the inner side of the fuselage 11, opposite to the exhaust port 15. After passing through the second flow hole 641 of the second muffler 64, the air in the exhaust space 61 is discharged from the exhaust port 15.

[0165] [Effect]

[0166] As explained above, in the embodiment, the vacuum cleaner 1 includes: a main body housing 5 having a suction port 14; a motor assembly housed in the main body housing 5, including a fan motor 8 that rotates around a rotation axis AX and generates a suction force at the suction port 14; and an outer flow path 60 as a first flow path, which is disposed radially between the motor assembly 7 and the main body housing 5 on the rotation axis AX, and is disposed only on a portion of the circumferential direction of the rotation axis AX, extending along a front-back direction parallel to the rotation axis AX, for airflow from the motor assembly 7.

[0167] Based on the above configuration, since the outer flow path 60 is only provided on a portion of the circumferential direction of the rotation axis AX, the enlargement of the vacuum cleaner 1 is suppressed. In particular, the enlargement of the main body shell 5 in the radial direction is suppressed.

[0168] In one embodiment, the outer flow path 60 is disposed above and below the motor assembly 7, or both.

[0169] Based on the above configuration, since the outer flow path 60 is provided above and below the motor assembly 7, or both, the enlargement of the main body housing 5 in the left-right direction is suppressed.

[0170] In this embodiment, the vacuum cleaner 1 includes a suction pipe 34 for supplying airflow to the suction port 14, and a dust collection cup 42 disposed further forward than the suction port 14. The suction pipe 34 and the dust collection cup 42 are arranged vertically. Outer flow paths 60 are respectively provided above and below the motor assembly 7.

[0171] Based on the above configuration, since the suction pipe 34 and the dust cup 42 are arranged vertically, the vertical dimensions of the vacuum cleaner 1 are increased at the suction pipe 34 and the dust cup 42. A dead zone is formed behind the suction pipe 34 and the dust cup 42. Since the outer flow paths 60 are respectively provided above and below the motor assembly 7, the outer flow paths 60 are positioned in the dead zone behind the suction pipe 34 and the dust cup 42. Because the dead zone is effectively utilized, the large size of the main body shell 5 in the left-right direction is suppressed. Furthermore, since the air discharged from the motor assembly 7 flows in the outer flow paths 60 above and below the motor assembly 7, the situation where the airflow decreases is prevented.

[0172] In one embodiment, the main housing 5 may have: a first rib 27 protruding from the inner surface of the main housing 5 and opposite to a portion of the outer surface of the motor assembly 7; and a second rib protruding from the inner surface of the main housing 5 and disposed radially outward than the first rib 27. An outer flow path 60 is disposed between the first rib 27 and the second rib 28.

[0173] Based on the above configuration, an outer flow path 60 can be formed by the first rib 27 and the second rib 28 of the main body shell 5.

[0174] In this embodiment, the main body housing 5 has a first rib 27 protruding from the inner surface of the main body housing 5 and opposing a portion of the outer surface of the motor assembly 7. An outer flow path 60 is located radially outward from the first rib 27. The vacuum cleaner 1 includes an inner flow path 66 as a second flow path, which is radially disposed between the motor assembly 7 and the first rib 27 along the rotation axis AX, extends in a front-rear direction parallel to the rotation axis AX, and allows airflow from the motor assembly 7. The air exhausted from the motor assembly 7 flows forward in the inner flow path 66, passes through the front end of the first rib 27, and then flows rearward in the outer flow path 60.

[0175] According to the above configuration, the air discharged from the motor assembly 7 flows forward in the inner flow path 66 and then flows backward in the outer flow path 60. Because the flow path of the air discharged from the motor assembly 7 is lengthened, the noise generated by the vacuum cleaner 1 is suppressed.

[0176] In one embodiment, the vacuum cleaner 1 includes a first noise reduction component 62 disposed on the outer flow path 60.

[0177] According to the above configuration, the noise generated by the vacuum cleaner 1 is suppressed by the first silencing component 62.

[0178] In one embodiment, the first noise-reducing component 62 has a first flow hole 621 that extends through the front and rear surfaces of the first noise-reducing component 62.

[0179] According to the above configuration, air can flow smoothly backward in the first flow hole 621.

[0180] In the implementation, the first flow hole 621 is provided at multiple different positions in the vertical direction and the horizontal direction.

[0181] According to the above configuration, air can flow smoothly rearward in each of the plurality of first flow holes 621.

[0182] In this embodiment, the front-to-back dimension of the first muffler 62 is greater than the vertical dimension and the horizontal dimension of the first muffler 62.

[0183] According to the above configuration, since the length of the first flow hole 621 in the front-to-back direction is increased, the noise generated by the air flowing in the first flow hole 621 is suppressed.

[0184] In one embodiment, the main body housing 5 has an exhaust port 15 for discharging air flowing through the outer flow path 60. The vacuum cleaner 1 includes a second silencing member 64 disposed inside the main body housing 5, opposite to the exhaust port 15. The second silencing member 64 has a second flow hole 641 penetrating both its surface and back surface. The size of the first flow hole 621 and the second flow hole 641 are different.

[0185] According to the above configuration, the noise generated by the vacuum cleaner 1 is suppressed by the second noise reduction component 64.

[0186] In one embodiment, the vacuum cleaner 1 includes a first elastic member 71 that contacts the front end of the motor assembly 7 and the main body housing 5, respectively.

[0187] According to the above configuration, the first elastic member 71 can suppress the transmission of vibrations from the motor assembly 7 to the main housing 5. As a result, noise generated by the vacuum cleaner 1 is suppressed.

[0188] In one embodiment, the main housing 5 has a partition 16 disposed in front of the motor assembly 7 and having a suction port 14 formed thereon. At least a portion of the first elastic member 71 contacts the inner surface of the suction port 14. At least a portion of the first elastic member 71 contacts the rear surface of the partition 16.

[0189] According to the above configuration, since at least a portion of the first elastic member 71 contacts the inner surface of the suction port 14, the movement of the motor assembly 7 in the radial direction can be restricted. Since at least a portion of the first elastic member 71 contacts the rear surface of the partition wall portion 16, the movement of the motor assembly 7 in the forward direction can be restricted.

[0190] In one embodiment, the first elastic member 71 has an annular large-diameter portion 71A that contacts the rear surface of the partition wall portion 16, and an annular small-diameter portion 71B that protrudes forward from the large-diameter portion 71A and contacts the inner surface of the suction port 14.

[0191] According to the above configuration, since the small-diameter portion 71B of the first elastic member 71 contacts the inner surface of the suction port 14, the movement of the motor assembly 7 in the radial direction can be restricted. Since the large-diameter portion 71A of the first elastic member 71 contacts the rear surface of the partition wall portion 16, the movement of the motor assembly 7 in the forward direction can be restricted.

[0192] In one embodiment, the first elastic member 71 includes: a metal mesh portion 711, a synthetic resin portion 712 for fixing the metal mesh portion 711, and a rubber portion 713 for fixing the synthetic resin portion 712.

[0193] According to the above configuration, the metal mesh portion 711 disposed at the vent 71C of the first elastic member 71 can prevent debris from passing through the vent 71C. The metal mesh portion 711 can also prevent debris from entering the interior of the motor assembly 7. The synthetic resin portion 712 ensures the rigidity of the first elastic member 71. The rubber portion 713 can prevent vibrations of the motor assembly 7 from being transmitted to the main housing 5, thus suppressing noise generated by the vacuum cleaner 1.

[0194] In one embodiment, the vacuum cleaner 1 includes a second elastic member 72 disposed further rearward than the first elastic member 71 and in contact with the motor assembly 7 and the main body housing 5, respectively.

[0195] According to the above configuration, the second elastic member 72 can suppress the transmission of vibrations from the motor assembly 7 to the main housing 5. As a result, noise generated by the vacuum cleaner 1 is suppressed.

[0196] In one embodiment, the second elastic member 72 is configured to contact the position in the motor assembly 7 where vibration is minimal when the fan motor 8 is rotating.

[0197] According to the above configuration, since the second elastic member 72 is in contact with the position of least vibration in the motor assembly 7, the transmission of vibration of the motor assembly 7 to the main body housing 5 can be effectively suppressed. As a result, the noise generated by the vacuum cleaner 1 is effectively suppressed.

[0198] In one embodiment, the radially inner end of the second elastic member 72 contacts the motor assembly 7, and the radially outer end of the second elastic member 72 is supported on the main body housing 5.

[0199] According to the above configuration, the motor assembly 7 is radially supported by the main housing 5 by means of the second elastic member 72.

[0200] In one embodiment, the second elastic member 72 contacts the outer surface of four portions of the middle part of the motor assembly 7 in the front-rear direction.

[0201] According to the above configuration, the motor assembly 7 is radially supported by the main housing 5 by means of four second elastic members 72.

[0202] In one embodiment, the second elastic member 72 has a main body portion 72A supported on the main body housing 5 and a support portion 72B having a curved surface that contacts the motor assembly 7.

[0203] According to the above configuration, since the contact area between the support portion 72B and the motor assembly 7 is small, the transmission of vibration from the motor assembly 7 to the main housing 5 can be effectively suppressed. Therefore, noise generated by the vacuum cleaner 1 is effectively suppressed.

[0204] [Other Implementation Methods]

[0205] Figure 15 This is a cross-sectional view of the vacuum cleaner 1 according to the embodiment. In the above embodiment, the outer flow path 60 is only provided above and below the motor housing 22. That is, the outer flow path 60 is only the outer upper flow path 60A and the outer lower flow path 60B. The outer flow path 60 can be only the outer upper flow path 60A or only the outer lower flow path 60B. The outer flow path 60 can also be only the outer left flow path 60C provided on the left side of the motor housing 22. The outer flow path 60 can also be only the outer right flow path 60D provided on the right side of the motor housing 22. The outer flow path 60 can also be only the outer upper left flow path 60E provided on the upper left side of the motor housing 22. The outer flow path 60 can also be only the outer lower right flow path 60F provided on the lower right side of the motor housing 22. The outer flow path 60 can also be only the outer upper right flow path 60G provided on the upper right side of the motor housing 22. The outer flow path 60 can also be only the outer lower left flow path 60H provided on the lower left side of the motor housing 22.

[0206] In the above embodiment, vacuum cleaner 1 is a cyclone vacuum cleaner. Vacuum cleaner 1 may also not be a cyclone vacuum cleaner.

Claims

1. A vacuum cleaner characterized by comprising: a main body case having a suction port; a motor assembly housed in the main body case, including a fan motor that rotates about a rotational axis, and causing the suction port to generate a suction force; and a first flow path provided between the motor assembly and the main body case in a radial direction of the rotational axis, and provided only on a part of a circumferential direction of the rotational axis, extending in a front-rear direction parallel to the rotational axis, for air discharged from the motor assembly to flow.

2. The vacuum cleaner according to claim 1, characterized in that: the first flow path is provided on one or both of an upper side and a lower side of the motor assembly.

3. The vacuum cleaner according to claim 1, characterized by comprising: a suction pipe portion through which air to be supplied to the suction port flows, and a dust collecting cup disposed at a position further forward than the suction port, the suction pipe portion and the dust collecting cup are disposed in an up-down direction, the first flow path is provided on the upper side and the lower side of the motor assembly, respectively.

4. The vacuum cleaner according to claim 1, characterized in that: the main body case has: a first rib that protrudes from an inner surface of the main body case, and opposes a part of an outer surface of the motor assembly; and a second rib that protrudes from the inner surface of the main body case, and is disposed at a position further radially outward than the first rib, the first flow path is provided between the first rib and the second rib.

5. The vacuum cleaner according to claim 1, characterized in that: the main body case has: a first rib that protrudes from an inner surface of the main body case, and opposes a part of an outer surface of the motor assembly, the first flow path is provided at a position further radially outward than the first rib, the vacuum cleaner has a second flow path provided between the motor assembly and the first rib in the radial direction of the rotational axis, extending in the front-rear direction parallel to the rotational axis, and for air discharged from the motor assembly to flow, air discharged from the motor assembly flows in the second flow path toward the front, and after passing through a front end portion of the first rib, flows in the first flow path toward the rear.

6. The vacuum cleaner according to claim 1, characterized by comprising: a first sound deadening member disposed in the first flow path.

7. The vacuum cleaner according to claim 6, characterized in that: the first sound deadening member has: a first flow-through hole that penetrates a front surface and a rear surface of the first sound deadening member.

8. The vacuum cleaner according to claim 7, characterized in that: the first flow-through hole is provided at a plurality of positions different from each other in an up-down direction and a left-right direction, respectively.

9. The vacuum cleaner according to claim 6, characterized in that: a dimension of the first sound deadening member in a front-rear direction is greater than dimensions of the first sound deadening member in an up-down direction and a left-right direction.

10. The vacuum cleaner according to claim 7, characterized in that: the main body case has: an exhaust port for discharging air flowing through the first flow path, ​ ​ ​ ​ The dust collector includes a second muffling member disposed on the inner side of the main body case at a position opposite the exhaust port, The second muffling member has a second flow-through hole that penetrates a front surface and a rear surface of the second muffling member, The first flow-through hole and the second flow-through hole differ in size.

11. The dust collector according to claim 1, wherein The dust collector includes a first elastic member that contacts the front end of the motor assembly and the main body case.

12. The dust collector according to claim 11, wherein The main body case includes a partition wall portion disposed in front of the motor assembly and formed with the suction port, At least a portion of the first elastic member contacts an inner surface of the suction port, At least a portion of the first elastic member contacts a rear surface of the partition wall portion.

13. The dust collector according to claim 12, wherein The first elastic member includes a ring-shaped large-diameter portion that contacts the rear surface of the partition wall portion, and a ring-shaped small-diameter portion that protrudes forward from the large-diameter portion and contacts the inner surface of the suction port.

14. The dust collector according to claim 11, wherein The first elastic member includes a metal mesh portion, a synthetic resin portion that secures the metal mesh portion, and a rubber portion that secures the synthetic resin portion.

15. The dust collector according to claim 11, wherein The dust collector includes a second elastic member disposed at a position further rearward than the first elastic member and contacting the motor assembly and the main body case.

16. The dust collector according to claim 15, wherein The second elastic member is disposed to contact a position in the motor assembly where vibration is minimal when the fan motor is rotating.

17. The dust collector according to claim 15, wherein An end portion of the second elastic member on the radially inner side contacts the motor assembly, An end portion of the second elastic member on the radially outer side is supported by the main body case.

18. The dust collector according to claim 15, wherein The second elastic member contacts outer surfaces of four portions of the intermediate portion of the motor assembly in the front-rear direction.

19. The dust collector according to claim 15, wherein The second elastic member includes a main body portion supported by the main body case, and a support portion having a curved surface that contacts the motor assembly.

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