JP7068066B2 - Suction port and vacuum cleaner - Google Patents

Suction port and vacuum cleaner Download PDF

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JP7068066B2
JP7068066B2 JP2018119338A JP2018119338A JP7068066B2 JP 7068066 B2 JP7068066 B2 JP 7068066B2 JP 2018119338 A JP2018119338 A JP 2018119338A JP 2018119338 A JP2018119338 A JP 2018119338A JP 7068066 B2 JP7068066 B2 JP 7068066B2
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suction port
gap
rotating
wall portion
shielding member
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JP2019217207A (en
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洋光 市川
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Toshiba Lifestyle Products and Services Corp
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Description

本発明の実施形態は、吸込口に配置される回転清掃体を有する吸込口体およびこれを備えた電気掃除機に関する。 An embodiment of the present invention relates to a suction port body having a rotary cleaning body arranged at the suction port and an electric vacuum cleaner provided with the suction port body.

従来、電気掃除機に用いられる回転清掃体である回転ブラシは、軸部と、軸部の外周に配置された掃除部とを備え、軸部の両端部が軸受を介して回転可能に支持されている。このような回転ブラシの場合、塵埃が軸受部分まで侵入してしまうと回転清掃体の回転荷重が増加してしまうため、これを抑制することが望まれている、例えば、髪の毛等の塵埃が軸受に絡み付いて回転が不安定にならないようにすることが求められる。 Conventionally, a rotary brush, which is a rotary cleaner used in an electric vacuum cleaner, has a shaft portion and a cleaning portion arranged on the outer periphery of the shaft portion, and both ends of the shaft portion are rotatably supported via bearings. ing. In the case of such a rotary brush, if dust invades the bearing portion, the rotational load of the rotary cleaning body increases, and it is desired to suppress this. For example, dust such as hair is a bearing. It is required to prevent the rotation from becoming unstable due to entanglement with the bearing.

これに対し、回転ブラシの軸部の端部に、塵埃を入り込みにくくするためのラビリンス構造を設けるものがある。しかしながら、吸込口体の軸方向の端部にラビリンス構造を設けると、その分、回転ブラシの形成可能範囲が小さくなるため掃除範囲が狭くなってしまう。 On the other hand, there is a method in which a labyrinth structure is provided at the end of the shaft portion of the rotating brush to prevent dust from entering. However, if the labyrinth structure is provided at the axial end of the suction port, the range in which the rotary brush can be formed becomes smaller by that amount, and the cleaning range becomes narrower.

特開2004-283405号公報Japanese Unexamined Patent Publication No. 2004-283405

本発明が解決しようとする課題は、塵埃の侵入に起因する回転清掃体の回転荷重の増加を抑制しつつ、回転清掃体による掃除範囲を広く確保できる吸込口体およびこれを備えた電気掃除機を提供することである。 The problem to be solved by the present invention is a suction port body capable of ensuring a wide cleaning range by the rotary cleaning body while suppressing an increase in the rotational load of the rotary cleaning body due to the intrusion of dust, and an electric vacuum cleaner provided with the suction port body. Is to provide.

実施形態の吸込口体は、長手状の吸込口と、受け部と、回転部と、回転清掃体と、第1隙間ないし第4隙間と、遮蔽部材と、を有する。吸込口は、塵埃を吸い込む。受け部は、第1壁部と、第2壁部と、を備え、吸込口に臨んで位置する。第1壁部は、吸込口の長手方向に沿って位置する。第2壁部は、吸込口の長手方向と交差する方向に沿って位置し開口部を有する。回転部は、開口部に挿通される軸体を備え、受け部の内方に回転可能に設けられる。回転清掃体は、掃除部と、軸部と、を備え、吸込口に配置される。掃除部は、被掃除面を掃除する。軸部は、軸方向と交差する方向に延びて第1壁部の吸込口側の端部と対向する回転清掃体側対向部を有し一端部が回転部と着脱可能なカップリング機構を構成する。第1隙間は、回転清掃体側対向部と第1壁部の端部との間に軸方向に形成される。第2隙間は、第1隙間と連通して第1壁部と回転部との間に径方向に形成される。第3隙間は、第2隙間と連通して第2壁部と回転部の軸部と反対側との間に軸方向に形成される。第4隙間は、第3隙間と連通して開口部と軸体との間に径方向に形成される。遮蔽部材は、弾性を有し、第1隙間に位置して受け部と回転清掃体との間に挟み込まれ、回転清掃体の回転により第1壁部と回転清掃体側対向部との一方と摺接することで第1隙間を閉塞する The suction port body of the embodiment has a longitudinal suction port, a receiving portion, a rotating portion, a rotary cleaning body, a first gap or a fourth gap, and a shielding member. The suction port sucks in dust. The receiving portion includes a first wall portion and a second wall portion, and is located facing the suction port. The first wall portion is located along the longitudinal direction of the suction port. The second wall portion is located along a direction intersecting the longitudinal direction of the suction port and has an opening. The rotating portion includes a shaft body inserted through the opening, and is rotatably provided inside the receiving portion. The rotary cleaning body includes a cleaning portion and a shaft portion, and is arranged at the suction port. The cleaning unit cleans the surface to be cleaned. The shaft portion has a rotary cleaning body side facing portion that extends in a direction intersecting the axial direction and faces the suction port side end portion of the first wall portion, and one end portion constitutes a coupling mechanism that can be attached to and detached from the rotating portion. .. The first gap is formed in the axial direction between the rotating cleaning body side facing portion and the end portion of the first wall portion. The second gap communicates with the first gap and is formed in the radial direction between the first wall portion and the rotating portion. The third gap communicates with the second gap and is formed in the axial direction between the second wall portion and the shaft portion and the opposite side of the rotating portion. The fourth gap communicates with the third gap and is formed in the radial direction between the opening and the shaft body. The shielding member has elasticity and is located in the first gap and is sandwiched between the receiving portion and the rotary cleaning body. Due to the rotation of the rotary cleaning body, one of the first wall portion and the rotating cleaning body side facing portion The first gap is closed by sliding contact .

第1の実施形態の吸込口体の一部を示す断面図である。It is sectional drawing which shows a part of the suction port body of 1st Embodiment. 同上吸込口体の一部を示す斜視図である。It is a perspective view which shows a part of the suction port body as above. 同上吸込口体を下側から示す斜視図である。Same as above It is a perspective view which shows the suction port body from the lower side. 同上吸込口体を備える電気掃除機を示す斜視図である。It is a perspective view which shows the electric vacuum cleaner provided with the suction port body as above. 第2の実施形態の吸込口体の一部を示す断面図である。It is sectional drawing which shows a part of the suction port body of 2nd Embodiment. 第3の実施形態の吸込口体の一部を示す断面図である。It is sectional drawing which shows a part of the suction port body of 3rd Embodiment.

(第1の実施形態)
以下、第1の実施形態について、図1ないし図4を参照して説明する。
(First embodiment)
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 4.

図4において、1は電気掃除機である。本実施形態の吸込口体14を備える電気掃除機1としては、例えばキャニスタ型の電気掃除機を例に挙げて説明する。電気掃除機1は、被掃除面である床面上を走行可能な掃除機本体2を備えている。掃除機本体2は、吸引源である電動送風機3と、電動送風機3の動作を制御する制御部と、電動送風機3および制御部等に給電するための電源部とを備えている。電源部は、二次電池等の電池でもよいし、外部電源を取るためのコードリール装置等でもよい。また、電気掃除機1は、電動送風機2の動作により吸い込んだ塵埃を溜める集塵部6を備えている。さらに、電気掃除機1は、本実施形態において、塵埃を集塵部6に吸い込むための風路体7を備えている。 In FIG. 4, reference numeral 1 is an electric vacuum cleaner. As the electric vacuum cleaner 1 provided with the suction port 14 of the present embodiment, for example, a canister type electric vacuum cleaner will be described as an example. The electric vacuum cleaner 1 includes a vacuum cleaner main body 2 capable of traveling on a floor surface which is a surface to be cleaned. The vacuum cleaner main body 2 includes an electric blower 3 which is a suction source, a control unit for controlling the operation of the electric blower 3, and a power supply unit for supplying power to the electric blower 3 and the control unit. The power supply unit may be a battery such as a secondary battery, or may be a cord reel device or the like for taking an external power source. Further, the electric vacuum cleaner 1 is provided with a dust collecting unit 6 for collecting dust sucked by the operation of the electric blower 2. Further, in the present embodiment, the electric vacuum cleaner 1 is provided with an air passage body 7 for sucking dust into the dust collecting unit 6.

風路体7は、掃除機本体2に接続されるホース体10を備えている。また、風路体7は、使用者が把持操作する操作部11を備えている。操作部11には、電気掃除機1の動作を設定する設定手段である設定ボタン12が配置されている。さらに、風路体7は、ホース体10と接続される延長管13を備えている。また、風路体7は、延長管13と接続される吸込口体14を備えている。 The air passage body 7 includes a hose body 10 connected to the vacuum cleaner main body 2. Further, the air passage body 7 includes an operation unit 11 that is gripped and operated by the user. The operation unit 11 is provided with a setting button 12 which is a setting means for setting the operation of the vacuum cleaner 1. Further, the air passage body 7 includes an extension pipe 13 connected to the hose body 10. Further, the air passage body 7 includes a suction port body 14 connected to the extension pipe 13.

そして、吸込口体14は、延長管13と接続される接続管16を備えている。また、吸込口体14は、接続管16と接続されたケース体17を備えている。図1ないし図4に示すケース体17は、例えば複数のケース部材に分割されていてもよい。また、ケース体17は、床面に対向する下部に、塵埃を吸い込むための吸込口20を備えている。吸込口20は、長手状に形成されている。 The suction port 14 includes a connecting pipe 16 connected to the extension pipe 13. Further, the suction port body 14 includes a case body 17 connected to the connecting pipe 16. The case body 17 shown in FIGS. 1 to 4 may be divided into, for example, a plurality of case members. Further, the case body 17 is provided with a suction port 20 for sucking dust in the lower portion facing the floor surface. The suction port 20 is formed in a longitudinal shape.

さらに、ケース体17には、吸込口20に回転清掃体である回転ブラシ21が配置されている。回転ブラシ21は、吸込口20の長手方向に沿って軸方向を有するように配置されている。また、回転ブラシ21は、床面を掃除する掃除部22を備えている。掃除部22は、例えば毛ブラシやブレード等が用いられる。さらに、回転ブラシ21は、掃除部22が設けられた軸部23を備えている。軸部23は、本実施形態において、軸部本体部25を備えている。軸部本体部25は、長尺状に形成され、長手方向に沿って掃除部22が保持されている。また、軸部23は、軸部23を回転可能に保持させるための軸受体26を備えている。軸受体26は、筒状に形成され、軸部本体部25の両端部に取り付けられている。また、軸受体26は、回転清掃体側対向部である鍔部27を備えている。鍔部27は、フランジ状に形成され、軸部23の軸方向に対して交差する方向に突出している。また、鍔部27は、板状をなし、両主面がそれぞれ平面状に形成されている。さらに、回転ブラシ21の一端部側の軸受体26は、被保持部29を備えている。本実施形態の被保持部29は、第1カップリング部材である。被保持部29は、鍔部27に対して、軸部本体部25とは反対側に位置している。また、被保持部29は、軸方向に見て、中心からの距離が相対的に近い部分と相対的に遠い部分とを備える形状に形成されている。例えば、被保持部29は、角筒状に形成されているが、多角形筒状や非円筒状等の形状でもよい。 Further, in the case body 17, a rotating brush 21 which is a rotating cleaning body is arranged at the suction port 20. The rotary brush 21 is arranged so as to have an axial direction along the longitudinal direction of the suction port 20. Further, the rotating brush 21 includes a cleaning unit 22 for cleaning the floor surface. For the cleaning unit 22, for example, a bristle brush, a blade, or the like is used. Further, the rotating brush 21 includes a shaft portion 23 provided with a cleaning portion 22. In the present embodiment, the shaft portion 23 includes a shaft portion main body portion 25. The shaft portion main body portion 25 is formed in a long shape, and the cleaning portion 22 is held along the longitudinal direction. Further, the shaft portion 23 includes a bearing body 26 for holding the shaft portion 23 rotatably. The bearing body 26 is formed in a cylindrical shape and is attached to both ends of the shaft portion main body portion 25. Further, the bearing body 26 includes a flange portion 27 which is a portion facing the rotary cleaning body side. The flange portion 27 is formed in a flange shape and protrudes in a direction intersecting the axial direction of the shaft portion 23. Further, the flange portion 27 has a plate shape, and both main surfaces are formed in a flat shape. Further, the bearing body 26 on the one end side of the rotary brush 21 includes a held portion 29. The held portion 29 of the present embodiment is a first coupling member. The held portion 29 is located on the side opposite to the shaft portion main body portion 25 with respect to the flange portion 27. Further, the held portion 29 is formed in a shape having a portion relatively close to the center and a portion relatively far from the center when viewed in the axial direction. For example, the held portion 29 is formed in the shape of a square cylinder, but may have a shape such as a polygonal cylinder or a non-cylindrical shape.

また、ケース体17には、吸込口20の長手方向の一端部に、受け部30が形成されている。受け部30には、回転部31が回転可能に配置されている。回転部31は、回転ブラシ21の一端部側の軸受体26とともにカップリング機構を構成し、回転ブラシ21の端部を受けて回転ブラシ21と一体的に回転するものである。回転部31は、回転部本体部32を備えている。回転部本体部32は、回転ブラシ21と同軸状又は略同軸状に配置される。回転部本体部32は、例えば筒状に形成され、受け部30の内方に位置している。また、回転部本体部32は、軸受体26の被保持部29が嵌合される第2カップリング部材である。また、本実施形態の回転部本体部32は、外側面部33が円筒面状に形成され、内側面部34が、被保持部29が嵌合される形状となっている。内側面部34は、被保持部29の外形に対応する形状を有し、軸方向に見て、中心からの距離が相対的に近い部分と相対的に遠い部分とを備える形状に形成されている。例えば、内側面部34は、角筒面状に形成されているが、多角形筒面状や非円筒面状等の形状でもよい。さらに、回転部31は、軸体35を備えている。軸体35の一端部は、回転部本体部32に対して接続されている。また、軸体35は、回転部本体部32に対して、例えばEリング等の抜け止め部材36により抜け止めされ、回転部本体部32と一体的に回転するようになっている。そして、軸体35の他端部は、軸受37を介してケース体17に支持されている。軸受37は、ケース体17の内部に固定されている。 Further, the case body 17 is formed with a receiving portion 30 at one end in the longitudinal direction of the suction port 20. A rotating portion 31 is rotatably arranged on the receiving portion 30. The rotating portion 31 constitutes a coupling mechanism together with the bearing body 26 on one end side of the rotating brush 21, receives the end portion of the rotating brush 21, and rotates integrally with the rotating brush 21. The rotating portion 31 includes a rotating portion main body portion 32. The rotating portion main body portion 32 is arranged coaxially or substantially coaxially with the rotating brush 21. The rotating portion main body portion 32 is formed in a cylindrical shape, for example, and is located inside the receiving portion 30. Further, the rotating portion main body portion 32 is a second coupling member into which the held portion 29 of the bearing body 26 is fitted. Further, in the rotating portion main body portion 32 of the present embodiment, the outer surface portion 33 is formed in a cylindrical surface shape, and the inner side surface portion 34 has a shape in which the held portion 29 is fitted. The inner side surface portion 34 has a shape corresponding to the outer shape of the held portion 29, and is formed in a shape including a portion relatively close to the center and a portion relatively far from the center when viewed in the axial direction. .. For example, the inner side surface portion 34 is formed in a square cylindrical surface shape, but may have a polygonal tubular surface shape, a non-cylindrical surface shape, or the like. Further, the rotating portion 31 includes a shaft body 35. One end of the shaft body 35 is connected to the rotating portion main body portion 32. Further, the shaft body 35 is prevented from coming off from the rotating part main body 32 by a retaining member 36 such as an E ring, and rotates integrally with the rotating part main body 32. The other end of the shaft body 35 is supported by the case body 17 via the bearing 37. The bearing 37 is fixed to the inside of the case body 17.

また、受け部30は、吸込口20の長手方向に沿って位置する第1壁部38と、吸込口20の長手方向に対して交差する方向に沿って位置する第2壁部39とを備える有底円筒状に形成されている。 Further, the receiving portion 30 includes a first wall portion 38 located along the longitudinal direction of the suction port 20 and a second wall portion 39 located along the direction intersecting the longitudinal direction of the suction port 20. It is formed in a bottomed cylindrical shape.

第1壁部38は、本実施形態において、第2壁部39とは反対側で吸込口20に臨む受け部側対向部である端部40が回転ブラシ21の鍔部27に隙間G1を介して対向して位置している。本実施形態の隙間G1は、回転ブラシ21の一端部側の軸受体26と受け部30との間に形成されている。また、本実施形態の隙間G1は、吸込口20と連通し、例えば回転ブラシ21をケース体17に対して取り付けるための軸方向のクリアランスとして設定されている。本実施形態の隙間G1は、回転ブラシ21をケース体17に対して取り付ける際に回転ブラシ21が回転部31とともに受け部30に対して軸方向に移動し得るクリアランスとして設定されている。また、第1壁部38は、内面41が回転部本体部32の外側面部33に隙間G2を介して対向して位置している。内面41は、例えば円筒面状に形成されている。本実施形態の隙間G2は、受け部30と回転部31との間に形成されている。また、本実施形態の隙間G2は、隙間G1と連通し、回転部31を受け部30に対して回転可能とするための径方向又は軸直方向のクリアランスとして設定されている。さらに、第1壁部38には、受け部30と回転ブラシ21との隙間を閉塞する遮蔽部材43が配置されている。遮蔽部材43は、本実施形態において、回転ブラシ21の鍔部27と端部40との軸方向の隙間G1を閉塞している。遮蔽部材43は、復元性を有する軟質部材であるとよい。また、遮蔽部材43は、表面の摩擦抵抗が少なく滑りやすい滑り部材であるとよい。さらに、遮蔽部材43は、摩耗しにくい耐摩耗性部材であるとよい。遮蔽部材43としては、例えば起毛布が好適に用いられるが、上記の性質を有するものであれば、特に限られるものではなく、例えば布等でもよい。また、遮蔽部材43は、例えば環状に形成されている。本実施形態において、遮蔽部材43は、第1壁部38の端部40の形状に沿う円環状とすることが好ましいが、隙間G1を閉塞できれば、円環状には限定されない。そして、遮蔽部材43は、受け部30と回転ブラシ21との間に弾性的に挟み込まれ、回転ブラシ21の回転により回転ブラシ21又は受け部30と摺接するようになっている。遮蔽部材43は、受け部30の端部40と回転ブラシ21の鍔部27とのいずれか一方に取り付けられるものであればよく、回転ブラシ21および回転部31の回転時に他方と摺接するようになっている。 In the present embodiment, the first wall portion 38 has an end portion 40, which is a receiving portion side facing portion facing the suction port 20 on the opposite side of the second wall portion 39, through a gap G1 in the flange portion 27 of the rotating brush 21. It is located opposite to each other. The gap G1 of the present embodiment is formed between the bearing body 26 on one end side of the rotary brush 21 and the receiving portion 30. Further, the gap G1 of the present embodiment communicates with the suction port 20, and is set as, for example, an axial clearance for attaching the rotating brush 21 to the case body 17. The gap G1 of the present embodiment is set as a clearance that allows the rotating brush 21 to move in the axial direction with respect to the receiving portion 30 together with the rotating portion 31 when the rotating brush 21 is attached to the case body 17. Further, the inner surface 41 of the first wall portion 38 is located so as to face the outer surface portion 33 of the rotating portion main body portion 32 via the gap G2. The inner surface 41 is formed, for example, in the shape of a cylindrical surface. The gap G2 of the present embodiment is formed between the receiving portion 30 and the rotating portion 31. Further, the gap G2 of the present embodiment is set as a radial or axial-direct clearance for communicating with the gap G1 and allowing the rotating portion 31 to rotate with respect to the receiving portion 30. Further, a shielding member 43 that closes the gap between the receiving portion 30 and the rotating brush 21 is arranged on the first wall portion 38. In the present embodiment, the shielding member 43 closes the axial gap G1 between the flange portion 27 and the end portion 40 of the rotary brush 21. The shielding member 43 is preferably a soft member having resilience. Further, the shielding member 43 is preferably a slippery member having low frictional resistance on the surface and slippery. Further, the shielding member 43 is preferably a wear-resistant member that is hard to wear. As the shielding member 43, for example, a brushed cloth is preferably used, but it is not particularly limited as long as it has the above-mentioned properties, and for example, a cloth or the like may be used. Further, the shielding member 43 is formed in an annular shape, for example. In the present embodiment, the shielding member 43 is preferably an annular shape that follows the shape of the end portion 40 of the first wall portion 38, but is not limited to the annular shape as long as the gap G1 can be closed. The shielding member 43 is elastically sandwiched between the receiving portion 30 and the rotating brush 21, and is brought into sliding contact with the rotating brush 21 or the receiving portion 30 by the rotation of the rotating brush 21. The shielding member 43 may be attached to either the end 40 of the receiving portion 30 or the flange portion 27 of the rotating brush 21, so as to be in sliding contact with the other when the rotating brush 21 and the rotating portion 31 rotate. It has become.

第2壁部39は、第1壁部38の端部40とは反対側の端部間を覆って形成されている。第2壁部39は、吸込口20側の一主面45が回転部23に対して隙間G3を介して対向している。本実施形態の隙間G3は、回転部31と受け部30との間に形成されている。また、本実施形態の隙間G3は、隙間G2と連通し、回転部31を受け部30に対して回転可能とするための軸方向のクリアランスとして設定されている。さらに、本実施形態の隙間G3は、例えば回転ブラシ21をケース体17に対して取り付けるための軸方向のクリアランスとして設定されている。また、本実施形態の隙間G3は、回転ブラシ21をケース体17に対して取り付ける際に回転部31が受け部30に対して軸方向に移動し得るクリアランスとして設定されている。そして、隙間G3は、回転部本体部32の背面側、すなわち吸込口20とは反対側に位置し、吸込口20側からのアクセスが困難又はアクセス不能な位置に形成されている。また、第2壁部39には、開口部46が形成されている。開口部46は、第2壁部39を厚み方向である吸込口20の長手方向に沿って貫通して形成されている。開口部46には、軸体35が挿通されている。開口部46の内面と軸体35の外面との間には、隙間G4が形成されている。本実施形態の隙間G4は、回転部31と受け部30との間に形成されている。また、本実施形態の隙間G4は、隙間G3と連通し、軸体35を開口部46に対して回転可能とするための径方向又は軸直方向のクリアランスとして設定されている。さらに、本実施形態の隙間G4は、回転部31を受け部30に対して回転可能とするための径方向又は軸直方向のクリアランスとして設定されている。また、第2壁部39には、吸込口20とは反対側の他主面47に、保持部48が突設されている。保持部48は、開口部46を囲んで筒状に形成されている。また、保持部48には、回転部31をケース体17に対して抜け止め保持する軸体保持体49が回転可能に保持されている。軸体保持体49は、軸体35の両端部間を保持している。また、軸体保持体49には、軸体35が同軸状又は略同軸状に挿通されるとともに抜け止め部材50により抜け止めされている。このため、軸体保持体49が回転部31と一体的に回転するようになっている。 The second wall portion 39 is formed so as to cover the space between the ends of the first wall portion 38 on the opposite side of the end portion 40. In the second wall portion 39, one main surface 45 on the suction port 20 side faces the rotating portion 23 via the gap G3. The gap G3 of the present embodiment is formed between the rotating portion 31 and the receiving portion 30. Further, the gap G3 of the present embodiment is set as an axial clearance for communicating with the gap G2 and allowing the rotating portion 31 to rotate with respect to the receiving portion 30. Further, the gap G3 of the present embodiment is set as, for example, an axial clearance for attaching the rotating brush 21 to the case body 17. Further, the gap G3 of the present embodiment is set as a clearance that allows the rotating portion 31 to move in the axial direction with respect to the receiving portion 30 when the rotating brush 21 is attached to the case body 17. The gap G3 is located on the back surface side of the rotating portion main body 32, that is, on the side opposite to the suction port 20, and is formed at a position where access from the suction port 20 side is difficult or inaccessible. Further, an opening 46 is formed in the second wall portion 39. The opening 46 is formed so as to penetrate the second wall portion 39 along the longitudinal direction of the suction port 20 which is the thickness direction. A shaft body 35 is inserted through the opening 46. A gap G4 is formed between the inner surface of the opening 46 and the outer surface of the shaft body 35. The gap G4 of the present embodiment is formed between the rotating portion 31 and the receiving portion 30. Further, the gap G4 of the present embodiment is set as a radial or axial clearance for communicating with the gap G3 and allowing the shaft body 35 to rotate with respect to the opening 46. Further, the gap G4 of the present embodiment is set as a radial or axial clearance for making the rotating portion 31 rotatable with respect to the receiving portion 30. Further, the holding portion 48 is projected from the second wall portion 39 on the other main surface 47 on the opposite side of the suction port 20. The holding portion 48 is formed in a cylindrical shape so as to surround the opening 46. Further, the holding portion 48 is rotatably held by a shaft body holding body 49 that holds the rotating portion 31 against the case body 17 so as to prevent it from coming off. The shaft body holder 49 holds between both ends of the shaft body 35. Further, the shaft body 35 is inserted into the shaft body holding body 49 coaxially or substantially coaxially, and is prevented from coming off by a retaining member 50. Therefore, the shaft body holder 49 rotates integrally with the rotating portion 31.

さらに、ケース体17には、吸込口20の長手方向の他端部に、図3に示す着脱部52が形成されている。着脱部52は、回転ブラシ21の端部をケース体17に対して着脱するためのものである。着脱部52は、ケース体17の一部を開閉して、吸込口20の長手方向の他端部に連なって取付開口部を開口させるものである。また、着脱部52には、回転ブラシ21の他端部側の軸受体26を回転可能に支持する軸受が配置されている。軸受は、着脱部52によりケース体17の一部を開放した状態で取付開口部から露出し、回転ブラシ21の他端側部の軸受体26を接続可能となっている。そして、回転ブラシ21の他端部側の軸受体26には、ケース体17に設けられた駆動源からの動力が伝達される伝達手段が接続されている。伝達手段としては、例えばギヤやタイミングベルト等が用いられ、この伝達手段は、駆動源の回転動作が回転ブラシ21を回転させる動力となるように伝達している。また、駆動源としては、例えば電力を回転力に変換するアクチュエータとしてモータが用いられてもよいし、吸込口20からの吸気流を利用して回転力を得るエアタービン等が用いられてもよい。 Further, the case body 17 is formed with a detachable portion 52 shown in FIG. 3 at the other end of the suction port 20 in the longitudinal direction. The attachment / detachment portion 52 is for attaching / detaching the end portion of the rotating brush 21 to / from the case body 17. The attachment / detachment portion 52 opens and closes a part of the case body 17 so as to be connected to the other end of the suction port 20 in the longitudinal direction to open the attachment opening. Further, the attachment / detachment portion 52 is provided with a bearing that rotatably supports the bearing body 26 on the other end side of the rotary brush 21. The bearing is exposed from the mounting opening in a state where a part of the case body 17 is opened by the attachment / detachment portion 52, and the bearing body 26 on the other end side of the rotary brush 21 can be connected. A transmission means for transmitting power from a drive source provided in the case body 17 is connected to the bearing body 26 on the other end side of the rotary brush 21. As the transmission means, for example, a gear, a timing belt, or the like is used, and the transmission means transmits so that the rotational operation of the drive source becomes the power for rotating the rotary brush 21. Further, as the drive source, for example, a motor may be used as an actuator for converting electric power into rotational force, or an air turbine or the like that obtains rotational force by using the intake flow from the suction port 20 may be used. ..

次に、第1の実施形態の作用を説明する。 Next, the operation of the first embodiment will be described.

回転ブラシ21をケース体17に取り付ける際には、まず、着脱部52を開いた状態で、回転ブラシ21の一端部側の軸受体26の被保持部29を回転部31の内側面部34と嵌合させる。次いで、回転ブラシ21の他端部側の軸受体26を、着脱部52により開かれた取付開口部に露出する軸受により支持するとともに、この軸受体26に伝達手段を接続し、着脱部52を閉じる。この結果、回転ブラシ21をケース体17に対して容易に取り付けできて吸込口20に回転可能に配置できる。 When attaching the rotating brush 21 to the case body 17, first, with the attachment / detachment portion 52 open, the held portion 29 of the bearing body 26 on one end side of the rotating brush 21 is fitted with the inner side surface portion 34 of the rotating portion 31. Match. Next, the bearing body 26 on the other end side of the rotary brush 21 is supported by the bearing exposed to the mounting opening opened by the attachment / detachment portion 52, and the transmission means is connected to the bearing body 26 to connect the attachment / detachment portion 52. close. As a result, the rotating brush 21 can be easily attached to the case body 17 and rotatably arranged at the suction port 20.

そして、使用者は、掃除機本体2に対して風路体7を接続し、操作部11の設定ボタン12により電気掃除機1の動作を設定し、電気掃除機1を起動させる。 Then, the user connects the air passage body 7 to the vacuum cleaner main body 2, sets the operation of the electric vacuum cleaner 1 by the setting button 12 of the operation unit 11, and activates the electric vacuum cleaner 1.

起動された電気掃除機1では、電動送風機3が設定された動作モードで動作されて負圧を発生させる。使用者は、吸込口体14を床面等の上で前後に移動させながら、電動送風機3の負圧が作用する吸込口20から塵埃を空気とともに吸い込む。 In the activated vacuum cleaner 1, the electric blower 3 is operated in the set operation mode to generate a negative pressure. The user sucks dust together with air from the suction port 20 on which the negative pressure of the electric blower 3 acts while moving the suction port body 14 back and forth on the floor surface or the like.

含塵空気は、負圧によって風路体7から集塵部6へと移動され、集塵部6にて塵埃が分離捕集される。塵埃が分離された空気は、電動送風機3に吸い込まれて、電動送風機3を冷却した後、掃除機本体2の外部に排出される。 The dust-containing air is moved from the air passage body 7 to the dust collecting unit 6 by a negative pressure, and the dust is separated and collected by the dust collecting unit 6. The air from which the dust is separated is sucked into the electric blower 3, cooled by the electric blower 3, and then discharged to the outside of the vacuum cleaner main body 2.

また、使用者は、吸込口体14に駆動源としてモータを備える場合、必要に応じて設定ボタン12の操作により回転ブラシ21を駆動させ、回転ブラシ21の掃除部22によって床面から塵埃を掻き出したり掻き取ったりすることもできる。 When the suction port 14 is equipped with a motor as a drive source, the user drives the rotary brush 21 by operating the setting button 12 as necessary, and the cleaning unit 22 of the rotary brush 21 scrapes dust from the floor surface. It can also be scraped off.

このとき、受け部30と回転ブラシ21との隙間を遮蔽部材43により閉塞しているため、吸込口20へと運ばれた塵埃が隙間G1から、隙間G2、隙間G3、隙間G4に亘る経路(矢印Aで示す)に入り込まない、又は、入り込みにくいようにすることができる。回転部31の奥へ塵埃が侵入してしまうと、この塵埃の絡み付き等に起因する回転ブラシ21の回転荷重が増加してしまうが、遮蔽部材43を用いることで、回転部31の奥へ塵埃が侵入し、回転ブラシ21の回転荷重が増加してしまうことを抑制できる。したがって、回転部31の奥へ侵入した塵埃の絡み付き等に起因する回転ブラシ21の回転荷重の増加を抑制できる。特に、カップリング機構を構成する回転部31は、受け部30の内方に位置し、受け部30に対して背面側の接続部分を容易に開放することができず、塵埃が入り込んだときに容易に取ることができないので、このような塵埃の入り込みを抑制することにより、回転ブラシ21を容易に接続できるカップリング機構を用いつつ、塵埃の絡み付き等に起因する回転ブラシ21の回転荷重の増加を抑制できる。 At this time, since the gap between the receiving portion 30 and the rotating brush 21 is closed by the shielding member 43, the dust carried to the suction port 20 passes from the gap G1 to the gap G2, the gap G3, and the gap G4. (Indicated by arrow A) can be prevented from entering or difficult to enter. If dust invades the interior of the rotating portion 31, the rotational load of the rotating brush 21 due to the entanglement of the dust increases, but by using the shielding member 43, the dust enters the interior of the rotating portion 31. Can be prevented from invading and increasing the rotational load of the rotary brush 21. Therefore, it is possible to suppress an increase in the rotational load of the rotating brush 21 due to entanglement of dust that has entered the depths of the rotating portion 31. In particular, the rotating portion 31 constituting the coupling mechanism is located inside the receiving portion 30, and the connection portion on the back side with respect to the receiving portion 30 cannot be easily opened, and when dust enters. Since it cannot be easily removed, by suppressing the ingress of such dust, the rotational load of the rotating brush 21 increases due to the entanglement of dust, etc., while using the coupling mechanism that can easily connect the rotating brush 21. Can be suppressed.

また、回転ブラシ21の軸方向に幅を取るラビリンス構造を用いることなく塵埃の侵入を抑制しているため、ラビリンス構造を用いる場合よりも清掃部22を回転ブラシ21の軸方向長さを大きく取ることが可能となり、回転ブラシ21による掃除範囲を広く確保できる。 In addition, since the intrusion of dust is suppressed without using the labyrinth structure that takes the width in the axial direction of the rotary brush 21, the cleaning unit 22 takes a larger axial length of the rotary brush 21 than when the labyrinth structure is used. This makes it possible to secure a wide cleaning range with the rotating brush 21.

また、例えば回転ブラシの軸部と軸受とをカップリング機構により接続する構成の場合、カップリング機構による取り付けを可能とするための軸方向のクリアランスが必要となることから、ラビリンス構造を設けていても、このクリアランスにより塵埃が入り込むおそれがあるが、本実施形態によれば、遮蔽部材43が、回転ブラシ21の軸方向に隙間を閉塞するので、軸部26と回転部31とのカップリング機構により回転ブラシ21を回転部31に接続するための軸方向のクリアランスを十分に取りつつ、このクリアランスからの塵埃の侵入を抑制できる。 Further, for example, in the case of a configuration in which the shaft portion of the rotary brush and the bearing are connected by a coupling mechanism, a labyrinth structure is provided because an axial clearance is required to enable mounting by the coupling mechanism. However, dust may enter due to this clearance, but according to the present embodiment, the shielding member 43 closes the gap in the axial direction of the rotating brush 21, so that the coupling mechanism between the shaft portion 26 and the rotating portion 31 is formed. As a result, it is possible to suppress the intrusion of dust from this clearance while sufficiently providing an axial clearance for connecting the rotary brush 21 to the rotary portion 31.

さらに、遮蔽部材43として起毛布を用いることにより、遮蔽部材43を安価に製造できるだけでなく、起毛布は、復元性を有し、滑り性が良好で、かつ、摩耗しにくいので、回転ブラシ21と受け部30との隙間を確実に閉塞しつつ、回転ブラシ21の回転荷重が遮蔽部材43の摺接によって増加したり、遮蔽部材43が早期に劣化したりしにくい。 Further, by using the raising cloth as the shielding member 43, not only the shielding member 43 can be manufactured at low cost, but also the raising cloth has resilience, good slipperiness, and is hard to wear, so that the rotating brush 21 While reliably closing the gap between the brush and the receiving portion 30, the rotational load of the rotating brush 21 is unlikely to increase due to the sliding contact of the shielding member 43, and the shielding member 43 is unlikely to deteriorate at an early stage.

また、遮蔽部材43を受け部30に取り付ける場合には、回転ブラシ21を取り外したときに、回転ブラシ21に遮蔽部材43が付随しないので、例えば回転ブラシ21を水洗いする等のメンテナンスをする際に、遮蔽部材43を傷めたり、遮蔽部材43が邪魔になったりすることがない。特に、吸込口20に臨む受け部30の端部40に遮蔽部材43を取り付けるので、遮蔽部材43を取り付けやすい。一方、遮蔽部材43を回転ブラシ21に取り付ける場合には、特に鍔部27等に取り付けることが可能であるため、取り付けがより容易である。 Further, when the shielding member 43 is attached to the receiving portion 30, since the shielding member 43 is not attached to the rotating brush 21 when the rotating brush 21 is removed, for example, when performing maintenance such as washing the rotating brush 21 with water. , The shielding member 43 is not damaged, and the shielding member 43 does not get in the way. In particular, since the shielding member 43 is attached to the end 40 of the receiving portion 30 facing the suction port 20, it is easy to attach the shielding member 43. On the other hand, when the shielding member 43 is attached to the rotary brush 21, it can be attached to the flange portion 27 or the like, so that the attachment is easier.

(第2の実施形態)
次に、第2の実施形態について図5を参照して説明する。なお、上記第1の実施形態と同様の構成および作用については、同一符号を付してその説明を省略する。
(Second embodiment)
Next, the second embodiment will be described with reference to FIG. The same components and operations as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

本実施形態において、回転ブラシ21は、一端部側の軸受体26の少なくとも一部が受け部30内に位置して、軸受体26と受け部30との間に隙間G5が形成されている。本実施形態の隙間G5は、軸受体26の鍔部27の外側面54と受け部30の第1壁部38の内面41との間に形成されている。また、本実施形態の隙間G5は、吸込口20および隙間G2と連通し、回転部31を受け部30に対して回転可能とするための径方向又は軸直方向のクリアランスとして設定されている。そして、本実施形態の遮蔽部材43は、受け部30の第1壁部38の内面41と鍔部27の外側面54との間に配置されて隙間G5を閉塞している。本実施形態の遮蔽部材43は、受け部30の第1壁部38の内面41と軸受体26の鍔部27とのいずれか一方に取り付けられ、回転ブラシ21および回転部31の回転時に他方と摺接するようになっている。 In the present embodiment, in the rotary brush 21, at least a part of the bearing body 26 on the one end side is located in the receiving portion 30, and a gap G5 is formed between the bearing body 26 and the receiving portion 30. The gap G5 of the present embodiment is formed between the outer surface 54 of the flange portion 27 of the bearing body 26 and the inner surface 41 of the first wall portion 38 of the receiving portion 30. Further, the gap G5 of the present embodiment is set as a radial or axial clearance for communicating with the suction port 20 and the gap G2 so that the rotating portion 31 can rotate with respect to the receiving portion 30. The shielding member 43 of the present embodiment is arranged between the inner surface 41 of the first wall portion 38 of the receiving portion 30 and the outer surface 54 of the flange portion 27 to close the gap G5. The shielding member 43 of the present embodiment is attached to either the inner surface 41 of the first wall portion 38 of the receiving portion 30 or the flange portion 27 of the bearing body 26, and is attached to the other when the rotating brush 21 and the rotating portion 31 are rotated. It is designed to be in contact with each other.

そして、受け部30と回転ブラシ21との隙間を受け部30の第1壁部38の内面41と鍔部27の外側面54との間で遮蔽部材43により閉塞しているため、吸込口20へと運ばれた塵埃が隙間G5から、隙間G2、隙間G3、隙間G4に亘る経路(矢印Aで示す)に入り込まない、又は、入り込みにくい。 Then, since the gap between the receiving portion 30 and the rotating brush 21 is blocked by the shielding member 43 between the inner surface 41 of the first wall portion 38 of the receiving portion 30 and the outer surface 54 of the flange portion 27, the suction port 20 Dust carried to does not enter the path (indicated by arrow A) extending from the gap G5 to the gap G2, the gap G3, and the gap G4, or is difficult to enter.

このように、受け部30の内面41と鍔部27の外側面54との間の隙間G5を遮蔽部材43により閉塞する場合でも、回転部31の奥への塵埃の侵入に起因する回転ブラシ21の回転荷重の増加を抑制しつつ、回転ブラシ21による掃除範囲を広く確保できる効果を奏する。 In this way, even when the gap G5 between the inner surface 41 of the receiving portion 30 and the outer surface 54 of the flange portion 27 is closed by the shielding member 43, the rotating brush 21 caused by the intrusion of dust into the depth of the rotating portion 31 It has the effect of ensuring a wide cleaning range with the rotating brush 21 while suppressing the increase in the rotational load.

(第3の実施形態)
次に、第3の実施形態について図6を参照して説明する。なお、上記第1の実施形態と同様の構成および作用については、同一符号を付してその説明を省略する。
(Third embodiment)
Next, the third embodiment will be described with reference to FIG. The same components and operations as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

本実施形態において、遮蔽部材43は、受け部30と回転部31との隙間を閉塞するものである。本実施形態の遮蔽部材43は、受け部30の第1壁部38の内面41と回転部31の側面部33との間に位置して隙間G2を閉塞している。また、本実施形態において、遮蔽部材43は、受け部30の第1壁部38の内面41と回転部31の外側面部33とのいずれか一方に取り付けられ、回転ブラシ21および回転部31の回転時に他方と摺接するようになっている。 In the present embodiment, the shielding member 43 closes the gap between the receiving portion 30 and the rotating portion 31. The shielding member 43 of the present embodiment is located between the inner surface 41 of the first wall portion 38 of the receiving portion 30 and the side surface portion 33 of the rotating portion 31 to close the gap G2. Further, in the present embodiment, the shielding member 43 is attached to either the inner surface 41 of the first wall portion 38 of the receiving portion 30 or the outer surface portion 33 of the rotating portion 31, and the rotating brush 21 and the rotating portion 31 rotate. Sometimes it comes in contact with the other.

そして、受け部30と回転部31との隙間を遮蔽部材43により閉塞しているため、吸込口20に運ばれた塵埃が隙間G1から、隙間G2、隙間G3、隙間G4に亘る経路(矢印Aで示す)に入り込まない、又は、入り込みにくい。 Since the gap between the receiving portion 30 and the rotating portion 31 is closed by the shielding member 43, the dust carried to the suction port 20 passes from the gap G1 to the gap G2, the gap G3, and the gap G4 (arrow A). (Indicated by) does not enter or is difficult to enter.

このように、遮蔽部材43により受け部30と回転部31との隙間を閉塞する場合でも、回転部31の奥への塵埃の侵入に起因する回転ブラシ21の回転荷重の増加を抑制しつつ、回転ブラシ21による掃除範囲を広く確保できる効果を奏する。 In this way, even when the gap between the receiving portion 30 and the rotating portion 31 is closed by the shielding member 43, the increase in the rotational load of the rotating brush 21 due to the intrusion of dust into the depth of the rotating portion 31 is suppressed. It has the effect of ensuring a wide cleaning range with the rotating brush 21.

なお、上記各実施形態において、キャニスタ型の電気掃除機1に用いられる吸込口体14について説明したが、例えばアップライト型やスティック型、あるいはハンディ型等の電気掃除機1に用いられる吸込口体14にも同様に適用できる。 Although the suction port 14 used in the canister type vacuum cleaner 1 has been described in each of the above embodiments, for example, the suction port body used in the upright type, stick type, handy type and the like electric vacuum cleaner 1 has been described. The same applies to 14.

また、例えば自律走行可能な掃除機本体の床面に対向する下部に吸込口体14が形成されたロボットクリーナにも同様に適用できる。この構成の場合、電気掃除機1は、風路体7を備えない構成とすることができる。 Further, for example, it can be similarly applied to a robot cleaner in which a suction port 14 is formed in a lower portion facing the floor surface of a vacuum cleaner body capable of autonomous traveling. In the case of this configuration, the vacuum cleaner 1 may be configured not to include the air passage body 7.

本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。 Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

1 電気掃除機
14 吸込口体
20 吸込口
21 回転清掃体である回転ブラシ
22 掃除部
23 軸部
30 受け部
31 回転部
35 軸体
38 第1壁部
39 第2壁部
43 遮蔽部材
1 Vacuum cleaner
14 Suction port
20 Suction port
21 Rotating brush that is a rotating cleaning body
22 Cleaning department
23 Shaft
30 receiving part
31 Rotating part
35 -axis body
38 1st wall
39 Second wall
43 Shielding member

Claims (4)

塵埃を吸い込む長手状の吸込口と、
前記吸込口の長手方向に沿って位置する第1壁部と、前記吸込口の長手方向と交差する方向に沿って位置し開口部を有する第2壁部と、を備え、前記吸込口に臨んで位置する受け部と、
前記開口部に挿通される軸体を備え、前記受け部の内方に回転可能に設けられた回転部と、
被掃除面を掃除する掃除部と、軸方向と交差する方向に延びて前記第1壁部の前記吸込口側の端部と対向する回転清掃体側対向部を有し一端部が前記回転部と着脱可能なカップリング機構を構成する軸部と、を備え、前記吸込口に配置される回転清掃体と、
前記回転清掃体側対向部と前記第1壁部の端部との間に軸方向に形成される第1隙間と、
前記第1隙間と連通して前記第1壁部と前記回転部との間に径方向に形成される第2隙間と、
前記第2隙間と連通して前記第2壁部と前記回転部の前記軸部と反対側との間に軸方向に形成される第3隙間と、
前記第3隙間と連通して前記開口部と前記軸体との間に径方向に形成される第4隙間と、
弾性を有し、前記第1隙間に位置して前記受け部と前記回転清掃体との間に挟み込まれ、前記回転清掃体の回転により前記第1壁部と前記回転清掃体側対向部との一方と摺接することで前記第1隙間を閉塞する遮蔽部材と、
を具備したことを特徴とする吸込口体
A long suction port that sucks in dust,
It is provided with a first wall portion located along the longitudinal direction of the suction port and a second wall portion located along the direction intersecting the longitudinal direction of the suction port and having an opening, and faces the suction port. With the receiving part located at
A rotating portion provided with a shaft body to be inserted through the opening and rotatably provided inside the receiving portion, and a rotating portion.
It has a cleaning part that cleans the surface to be cleaned and a rotating cleaning body side facing portion that extends in a direction intersecting the axial direction and faces the end portion on the suction port side of the first wall portion, and one end portion thereof is the rotating portion. A rotary cleaning body provided with a shaft portion constituting a detachable coupling mechanism and arranged at the suction port, and a rotary cleaning body.
A first gap formed in the axial direction between the rotary cleaning body side facing portion and the end portion of the first wall portion,
A second gap that communicates with the first gap and is formed in the radial direction between the first wall portion and the rotating portion.
A third gap that communicates with the second gap and is formed in the axial direction between the second wall portion and the shaft portion and the opposite side of the rotating portion.
A fourth gap that communicates with the third gap and is formed in the radial direction between the opening and the shaft body.
It has elasticity and is located in the first gap and is sandwiched between the receiving portion and the rotary cleaning body, and the rotation of the rotary cleaning body causes the first wall portion and the rotary cleaning body side facing portion to be connected to each other. A shielding member that closes the first gap by sliding contact with one of the members.
A suction port body characterized by being equipped with .
前記遮蔽部材は、起毛布である
ことを特徴とする請求項記載の吸込口体。
The suction port body according to claim 1 , wherein the shielding member is a raised cloth.
前記遮蔽部材は、前記第1壁部に取り付けられる
ことを特徴とする請求項1又は2記載の吸込口体。
The suction port body according to claim 1 or 2 , wherein the shielding member is attached to the first wall portion .
請求項1ないしいずれか一記載の吸込口体を備える
ことを特徴とする電気掃除機。
A vacuum cleaner comprising the suction port according to any one of claims 1 to 3 .
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102007358B1 (en) * 2012-09-28 2019-08-05 엘지이노텍 주식회사 Silicon carbide sintered body and preparing method of the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011050428A (en) 2009-08-31 2011-03-17 Toshiba Corp Rotary cleaning body and suction port body

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6129407Y2 (en) * 1980-08-09 1986-08-30
JPS60101047U (en) * 1983-12-13 1985-07-10 松下電器産業株式会社 vacuum cleaner floor nozzle
JPH02220621A (en) * 1989-02-23 1990-09-03 Matsushita Electric Ind Co Ltd Floor nozzle for vacuum cleaner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011050428A (en) 2009-08-31 2011-03-17 Toshiba Corp Rotary cleaning body and suction port body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102007358B1 (en) * 2012-09-28 2019-08-05 엘지이노텍 주식회사 Silicon carbide sintered body and preparing method of the same

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