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81. 发明专利

JPH0779895A SUCTION PART OF ELECTRIC CLEANER 失效
公开(公告)号：JPH0779895A
公开(公告)日：1995-03-28
申请号：JP23289793
申请日：1993-09-20
申请人： HITACHI LTD
发明人： SATO SHIGENORI , YAMAZAKI SUSUMU , SUNAKAWA MASARO , YAMAMOTO WATARU , SATO SUSUMU
IPC分类号： A47L9/04
摘要： PURPOSE:To reduce noise of an air turbine by providing a partition plate between an air turbine chamber and a brush chamber to be inclined to a floor surface, providing a main nozzle and an auxiliary nozzle at the partition plate to discharge air currents from the main nozzle upward, and rotating the air turbine and a lower part of a rotary brush in the advance direction of the suction part. CONSTITUTION:Sucked air 11 flows from a floor surface of a suction part case through a rotary brush chamber, a main nozzle 4, a runner 5, a passage 6 around the runner 5, and a receiving port 7. A jet air current 11c from the main nozzle 4 provided at an inclined partition plate between the brush chamber 1 and an air turbine chamber 2 is jetted upward to set a rotation direction 13 of the runner 5 in the advance direction 15. A rotation direction 14 of a rotary brush 3 is also set to be similar by a timing belt. In the case of a carpet or the like, when an inflow surface of a subsidiary nozzle is set to be almost half, flow at the main nozzle 4 becomes small to reduce noise. In the case of a woody floor or the like, the inflow surface of the auxiliary nozzle is fully opened to reduce noise further.

82. 发明专利

JPH06254007A SUCTION PORT FOR VACUUM CLEANER 失效
公开(公告)号：JPH06254007A
公开(公告)日：1994-09-13
申请号：JP4626593
申请日：1993-03-08
申请人： HITACHI LTD
发明人： SUNAKAWA MASARO , YAMAMOTO WATARU
IPC分类号： A47L9/02
摘要： PURPOSE:To suppress a noise, and to prevent a sign for informing a refuse dumping time from being turned on even if a suction port for a clearance is used by providing a ventilation part on a side face of a connecting part so as to lead in the open air and to allow it to flow roughly in parallel to a suction air current for flowing together with dust at the time when it is connected to a hose joint or an extension tube. CONSTITUTION:A ventilation part 26 is provided on a side face of a connecting part 5 a hose joint or an extension tube 3 of a suction port main body 1 so as to lead in the open air and to allow it to flow roughly in parallel to a suction air current for slowing together with dust at the time when it is connected to the hose joint or the extension tube 3. Accordingly, even if the air quantity is narrowed down at the time when a flat suction port 2 is clogged up by the cleaning face in the course of use, it does not occur that negative pressure rises to a prescribed value or above due to the open air from the ventilation part 26. In such a way, it does not occur that a refuse dumping time is informed erroneously to a user, and also, an increase in noise can be suppressed.

83. 发明专利

JPH06133908A SUCTION MOUTH OF ELECTRIC VACUUM CLEANER 失效
公开(公告)号：JPH06133908A
公开(公告)日：1994-05-17
申请号：JP29242392
申请日：1992-10-30
申请人： HITACHI LTD
发明人： YAMAMOTO WATARU
IPC分类号： A47L9/02 , A47L9/04
摘要： PURPOSE:To prevent a bypass valve from becoming incapable of interlocking with a wheel axis in a suction mouth with bypass of an electric vacuum cleaner in which a bypass valve to open and close the bypass is installed interlocking with the axle capable of making play up and down. CONSTITUTION:In a suction mouth having a bypass, a bypass nozzle 19 to serve as bypass and a bypass lever 20 to open and close the bypass are furnished in a suction passage, and the bypass lever 20 is interlocked with an axle capable of making play up and down penetrating a wheel 12 through an arm 21 borne rotatably, and in front of and behind this arm, ribs 67, 68 to serve as guide for vertical motion are furnished on a lower case 3. This constitution eliminates such occurrence that the bypass valve to open and close the bypass can no more interlock with the wheel axis when the bypass is going to be opened and closed, and the reliance upon opening and closing of the bypass can be enhanced.

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