JPH10201682A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clean sucking body excellent in strength and having satisfactory maintenance property by providing a handle so that a suction port cover can be fixed to a suction body, and curving the fitting part of an upper case to the suction port cover on a rotating cleaner body side. SOLUTION: A pair of horizontally sliding opening and closing levers 113 are set on the inside of a suction port cover 107, and they are operated, whereby the suction port cover 107 can be attached to and detached from a suction port body 108, An upper case 110 has a form partially curved on the suction port cover 107 side, and a groove part 114 is formed along it. Since a rib 115 having the same curved shape is set on the suction port cover 107 so as to be fitted to the groove part 114, the fitting part 116 has a curved form. The suction port cover 107 is stronger than a linear suction port cover, and the camber in molding of the suction port cover 107 is minimized. Since the clearance of the fitting part 116 is minute, the leak of the air flow sucked from the cleaner body can be reduced to improve the sucking performance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a vacuum cleaner.

[0002]

2. Description of the Related Art Conventionally, in a vacuum cleaner having an air turbine, in order to solve the problem that noise is generated by the rotating brush rotating at a high speed when lifted to a suction body, for example, a conventional vacuum cleaner is disclosed. As disclosed in Japanese Patent Application Laid-Open No. 61-188549, a technique has been proposed in which a vent hole communicating with outside air is opened by rotating a suction main body downward to reduce the number of revolutions of an air turbine. 61-18
The technique described in Japanese Patent No. 8549 has a drawback that when dust or the like gets caught in the communication hole, it becomes difficult for outside air to flow in, and the rotation speed of the air turbine does not decrease.

To solve this problem, Japanese Patent Laid-Open No. 7-116093
As described in the publication, when the mouthpiece body is lifted, the rotating brush descends below the mouthpiece body by its own weight along the bearing part of the mouthpiece body, and a part of the rotating brush contacts the opening edge of the mouthpiece body. A technique for reducing the number of rotations of the rotating brush has been proposed.

[0004]

SUMMARY OF THE INVENTION
In the technique described in JP-A-7-116093, the rotation speed of the rotating brush is reduced only when the mouthpiece is lifted, and the rotating brush is not rotated when the cleaner body is set up as in an upright type vacuum cleaner. No consideration was given to reducing the rotational speed.

Further, in the technique described in Japanese Patent Application Laid-Open No. Hei 7-116093, the joint between the upper case and the suction port cover used is substantially straight when the suction body is viewed from above. The shape of the suction inlet cover is a rectangular box shape with a shallow bottom, which is weak in terms of strength.The molded product is likely to be warped, and the joint between the upper case and the suction cover has a large step when combined. Not preferred.
Furthermore, when a gap is formed between the upper case and the suction port cover, the airflow sucked by the cleaner body enters from the gap, and the air volume originally entering from the suction port of the lower case decreases.
There is a problem that the suction performance is reduced.

Further, even when the suction body is viewed from above, and the mating portion of the upper case and the suction cover is partially curved toward the rotary cleaning body, the method of fixing the suction cover is not limited to that of the suction cover. Since the integral pawl is merely a structure that fits into the lower case, there is a problem that the mouthpiece easily comes off when used or when the mouthpiece hits a pillar or the like.

A conventional casing having a suction passage rotatable in the vertical direction, a suction joint installed rotatably in the left and right direction at the rear of the casing, a suction port on the lower surface, and an air outlet for blowing air to the turbine. A suction case formed by a lower case forming a nozzle a and an upper case provided with a ventilation hole for sending air to a turbine; and a rotating shaft which can be detachably installed at a suction opening of the suction body. A vacuum cleaner having a rotary cleaning body provided with a turbine for rotational driving, and a suction port cover having a nozzle b for blowing air to the turbine and covering the rotary cleaning body. Since the fitting of the upper case and the suction port cover was a straight line when the suction body was viewed from above, the shape of the suction port cover was a rectangular box with a shallow bottom. Degrees to weak and warpage is easily generated in the molded article, the joint portion of the upper case and the inlet cover, the combination when a step is greater appearance design undesirable. Furthermore, when a gap is formed between the upper case and the suction port cover, the airflow sucked by the cleaner body enters through the gap, and the amount of air to the turbine for driving the rotation decreases, and the rotation torque of the rotary cleaning body decreases. Then, there was a problem that the ability to scrape garbage was deteriorated.

If the shape of the lower surface of the main body of the vertical cleaner is more convex than the straight line of the joint between the upper case and the suction cover, the suction cover cannot be removed in the stand-up state. In order to remove the vacuum cleaner, the main body of the vacuum cleaner must be laid down.

[0009] Further, the suction body installed on the upper surface and the rear surface of the ventilation hole for sending air to the turbine installed in the upper case,
There was a problem that the mouthpiece was weak against impact force in the lateral direction and was easily damaged.

In addition, even when the vertical cleaner is operated in the stand-up state, the amount of air to the turbine is sufficient for the rotating cleaning body to rotate, so that the rotating cleaning body rotates at the same place on the floor for a long time. There was a problem that the floor was damaged.

In addition, since the casing and the mouth joint are separate from each other in this mouth body and the rotating portion has a small gap, the airflow sucked by the cleaner body enters from the gap, and the suction port of the lower case is originally required. However, there is a problem that the amount of air flowing into the turbine decreases, the suction performance decreases, the amount of air to the turbine for rotational driving decreases, the rotational torque of the rotary cleaning body decreases, and the ability to scoop up dust deteriorates.

Further, since the wheel on the rear side of the mouthpiece is separate from the wheel shaft of the steel rod, it takes time to disassemble the wheel when sorting and discarding, so that the recyclability is poor.

Further, since the components of the mouthpiece mounted on the vertical cleaner requiring high strength are not made of a structure and material that can withstand washing, there is a problem that the components of the mouthpiece are unsanitary. Was.

Further, since all the components of the suction body mounted on a vertical cleaner requiring high strength are not made of a structure and material that can withstand water washing, it is not possible to wash water with a single suction body, resulting in unsanitary problems. was there.

Further, even with a water-washable mouthpiece having a plurality of drainage holes, there is no R on at least one entire circumference, so that there is a problem that water cannot be sufficiently drained due to surface tension.

An object of the present invention is to solve the above-mentioned problems and to provide an electric vacuum cleaner which is effective for reducing the number of revolutions of a rotating brush when the main body of the upright type electric vacuum cleaner is in an upright position.

Another object of the present invention is to provide a vacuum cleaner having a clean suction body with good maintenance and capable of washing the entire suction port with high strength and excellent performance.

[0018]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is characterized in that a casing having a suction passage rotatable vertically and a rotatable left and right direction at the rear of the casing. A suction body formed by a suction joint, a lower case having a suction port on the lower surface, and an upper case, a rotating cleaning body that can be detachably mounted on the suction body, and a detachable mounting that covers the rotating cleaning body And a fixing knob provided at least at one place so that the suction port cover can be fixed to the suction main body. When viewed from above, the mating portion between the upper case and the suction port cover is partially curved toward the rotary cleaning body.

A casing having a suction passage rotatably in the vertical direction, a suction joint installed rotatably in the left and right direction at the rear of the casing, a suction port on the lower surface, and a nozzle a for blowing air to the turbine on the outside. At least one
A suction case formed by a lower case having a plurality of upper case and an upper case provided with a ventilation hole for sending air to the turbine, and on the same axis as a rotating shaft which can be detachably installed at a suction opening of the suction body. On the outside, there is provided a rotary cleaning body provided with at least one turbine for rotationally driving, and a suction port having a nozzle b for blowing air to the turbine and a suction port cover for covering the rotary cleaning body. In addition, at least one fixing knob is provided separately so that the suction port cover can be fixed to the suction port main body, and a part where the upper case and the suction port cover are joined to the rotary cleaning body side is partly viewed from above. It has been curved.

[0021] Another object of the present invention is to provide a shape in which a curved joining portion between the upper case and the suction port cover matches the shape of the lower portion of the main body of the vertical vacuum cleaner or has an offset shape.

Further, a ventilation hole for sending air to the turbine installed in the upper case is provided only on the upper surface side of the upper case.

Also, only when the vertical vacuum cleaner is in the stand-up state, the ventilation hole for sending air to the turbine installed in the upper case is partially blocked by the lower part of the vertical vacuum cleaner main body to reduce the air volume. In order to reduce the number of rotations of the rotating cleaning body, or to stop the rotation.

Also, the rear wheel of the suction body is made larger in the radial direction than the wheel installed on the front side of the lower case, and the casing and the suction joint are integrally formed so that the casing can be rotated only in the vertical direction with respect to the suction body. It is to constitute so that it becomes.

It is another object of the present invention to integrally form the wheel and the wheel shaft on the rear side of the mouthpiece.

Further, even in a suction body mounted on a vertical vacuum cleaner requiring strength, each part is made of a material that can be washed with water.

In addition, even in the case of a suction body mounted on a vertical cleaner that requires strength, all parts are made of a material that can be washed with water.

Further, even in the case of a mouthpiece having a plurality of drainage holes formed in the lower case, R0.3 or more is provided on at least one entire circumference of the drainage holes.

[0028]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 7 is a perspective view of the entire external appearance of a vertical vacuum cleaner according to one embodiment of the present invention. Reference numeral 101 denotes a vertical vacuum cleaner body having a built-in control circuit, electric blower, and the like, and 102 denotes a handle. It is fixed with screws so as to be able to expand and contract vertically with the pipe 103. 104 is a hand switch and handle 1
02, which can be slid to adjust the rotation speed of the electric blower, that is, the suction force, via a control circuit. Reference numeral 105 denotes a suction lock button.
1 and the mouthpiece 106 can be separated as shown in FIG.

As a suction body used in such a vacuum cleaner, a type in which a cleaning body is rotated by a turbine driven by a suction airflow of an electric blower as a driving source is mainly employed.

This embodiment relates to the improvement of such a mouthpiece. FIG. 1 is a top view of a mouthpiece 106 showing one embodiment of the present invention, and FIG. FIG. 3 is a structural sectional view of the mouthpiece 106 as viewed from above.
FIG. 4 is a sectional view taken along line AA of the suction port cover 107, and FIG.
It is a rear view of the suction port cover 107.

Suction body 108 serving as a skeleton of suction body 106
Is divided into upper and lower portions at a height of about the center thereof, and is formed by a lower case 109 forming an outer shell and an upper case 110 disposed at an upper rear portion thereof.

An impact absorbing bumper 111 for keeping airtightness and preventing damage to furniture and the like is attached to the outer periphery of the position where the lower case 109 and the upper case 110 come into contact with each other by sandwiching.

As shown in FIG. 11, a rotary cleaning body 112 is provided in front of the suction main body 108 so as to be detachable, and a suction port cover 107 for covering it is provided in the upper front.

Inside the suction port cover 107, a pair of opening and closing levers 113 which are slid in the lateral direction are installed, and by operating this, the suction port cover 108 is moved from the suction main body 108 as shown in FIGS. 107 can be attached and detached.

The upper case 110 has a partially curved shape toward the suction port cover 107, and the groove A
114 are formed. In addition, the intake port cover 107 is provided with ribs 115 having the same curved shape so as to fit into the groove portions A114, so that as shown in FIG.
Joint 116 between upper case 109 and suction port cover 107
Has a curved shape when the mouthpiece 106 is viewed from above.

The intake cover 107 having the curved ribs 115 is stronger in strength than the linear intake cover 107 shown in FIG.
7 also has less warpage during molding. For this reason, the upper case 110
The gap between the joint 116 of the suction port cover 107 and the suction port cover 107 becomes very small, so that the leakage of the suction airflow from the cleaner body 101 is reduced, and the suction performance and the scraping performance of the rotary cleaning body 112 are improved. In addition, the appearance is improved.

The line of the joint 116 between the upper case 110 and the suction port cover 107 has the same shape as the lower shape 117 of the vertical vacuum cleaner.

At the rear end of the mouthpiece main body 108, there is provided a casing 118 which can rotate vertically.

As shown in FIGS. 2 and 13, the lower case 109 keeps the lower surface of the suction body 106 and the cleaning surface at a constant distance, and easily moves the whole suction body 106 back and forth and also in the front and rear diagonal directions. Thus, a pair of front wheels 119 and a rear wheel 120 having a larger diameter than the front wheels 119 are installed, and thereafter, the wheels 120 are integrally formed with a wheel shaft.

The lower case 109 has a pressure control plate 122 for keeping the suction pressure in the suction port 121 constant.
However, it is installed before and after the suction port 121.

Further, the lower case 109 has a drain hole 12.
3 is provided, and the entire circumference R124 as shown in FIG. 6 is provided.

The rotary cleaning body 112 has soft and hard brushes alternately arranged in a groove made of metal such as aluminum for the purpose of scraping up dust, wiping the cleaning floor, and the like. , A turbine 125 is firmly bonded and inserted.

The turbine 125 is formed of a turbine A 126 and a turbine B 127, and the two joining surfaces are firmly fixed by ultrasonic welding.

The rotating shaft 1 is provided at both ends of the pair of turbines 125.
28 is press-fitted, and is rotatably supported by a slide bearing 129.

The sliding bearing 129 is press-fitted into the bearing cover 130 and is held by a groove B131 provided in the lower case 109.

FIG. 14 shows B in the mouthpiece 106 of FIG.
-B cross-section, multi-blade nozzles 132 and 133 for blowing air towards turbine 125
5 is installed so as to substantially cover the outer periphery.

The multi-blade nozzles 132 and 133 are vertically divided into two parts, and the upper multi-blade nozzle 132 is fixed to the back surface of the suction port cover 107 by screws 134 as shown in FIG. The multi-blade nozzle 133 on the side is fixed to the lower case 109 by screws 134 as shown in FIG.

The material of the screw 134 and the axle used for the front wheel 119 is zinc-plated iron, hardly rusts even when it comes in contact with water, and the rotary shaft 128 used for the rotary cleaning body 112 The material of is a stainless steel rod and excellent in rust prevention, the material of the slide bearing 129 is polyacetal resin, so that it can be washed with water, and the material of all other members constituting the suction body 106 is also made of synthetic resin. All parts can be washed with water.

The air for driving the turbine 125 is
The air is sucked through an air inlet 136 having a large number of ventilation holes provided in the upper part of the upper case 110, guided to the multi-blade nozzles 132 and 133, and then blown toward the turbine 125. Thereby, the turbine 125 rotates, and the rotating cleaning body 112 integrated therewith also rotates. Then, turbine 1
The air blown toward 25 passes through bell mouth portion 135 and casing 118 and is sucked into the cleaner body.

On the other hand, the air containing dust is supplied to the suction port 121.
Directly through the bell mouth portion 135 and the casing 118 and into the cleaner body.

Parts a137, b138, and c139 of intake ports having a large number of ventilation holes provided in the upper part of upper case 110.
When the vertical vacuum cleaner main body is in an upright state, the vertical vacuum cleaner main body lower shape 117 is arranged so as to be closed, and the amount of air for driving the turbine 125 is reduced. The rotation of the rotary cleaning body 112 stops or rotates at a very low speed.

[0053]

As described above, according to the present invention, when the suction body is viewed from above, the mating portion of the upper case and the suction port cover is partially curved toward the rotary cleaning body, and the suction port cover is separated. Since it is fixed by the opening and closing lever of the body, the strength of the suction port cover can be increased.

Also, warpage is less likely to occur during molding of the suction port cover, and the joint between the upper case and the suction port cover has a small step when combined, so that the appearance is excellent.

Also, since the gap between the upper case and the inlet cover is small, there is little leakage, the amount of air to the turbine for rotational drive is increased, the rotational torque of the rotary cleaning body is improved, and the ability to scoop up dust is improved. Will be better.

In use, even when the mouthpiece hits a pillar or the like, it is hard to come off.

In addition, since the suction port cover can be removed with the vertical cleaner standing, the maintenance of the rotary cleaning body is good.

Since the ventilation holes for sending air to the turbine installed in the upper case are provided only on the upper surface, the suction body is resistant to impact force and can be hardly damaged.

Further, even when the operation is performed with the vertical vacuum cleaner standing up, the rotation speed of the air turbine is reduced, so that it is possible to prevent the rotary cleaning body from damaging the floor surface.

Further, since the casing and the suction joint are integrated, there is no leakage of the suction airflow therefrom, the amount of air to the turbine for driving the rotation is increased, and the rotation torque of the rotary cleaning body is improved.

Further, since the casing and the inlet joint are integrated and the rear wheel axle and the wheel are integrated, the number of parts is small and the disassembling time is short, so that recyclability is good.

Further, since all the components of the mouthpiece are structured and made to withstand washing with water, the mouthpiece alone can be washed with water and sanitary.

Further, since the entire periphery R is formed in the drain hole of the lower case, the drainability is good.

[Brief description of the drawings]

FIG. 1 shows a mouthpiece 106 showing an example of an embodiment of the present invention.
FIG.

FIG. 2 is a center cross-sectional view of the mouthpiece 106.

FIG. 3 is a structural sectional view of the mouthpiece 106 as viewed from above.

FIG. 4 is a sectional view of the suction port cover 107 taken along line AA.

FIG. 5 is a rear view of the suction port cover 107;

FIG. 6 is an enlarged sectional view of a lower case drain hole.

FIG. 7 is an overall external perspective view of a vertical vacuum cleaner according to an example of an embodiment of the present invention.

FIG. 8 is a perspective view of the vertical vacuum cleaner main body 101 with the mouthpiece 106 removed.

FIG. 9 is a front perspective view showing a state where the suction port cover 107 is removed.

FIG. 10 is a rear perspective view illustrating a state where the suction port cover 107 is removed.

FIG. 11 is a perspective view showing a state where the rotary cleaning body 112 is removed.

FIG. 12 is a perspective view of the suction body 106 with the suction port cover 107 and the rotary cleaning body 112 removed.

FIG. 13 is a perspective view of the mouthpiece 106 as viewed from below.

FIG. 14 is a sectional view of the suction body taken along line BB.

FIG. 15 is a top view of a conventional mouthpiece.

[Explanation of symbols]

101: vacuum cleaner main body, 102: handle, 103: pipe, 104: hand switch, 105: suction lock button, 106: suction body, 107: suction cover, 108:
Suction body, 109: lower case, 110: upper case, 11
DESCRIPTION OF SYMBOLS 1 ... Bumper, 112 ... Rotary cleaning body, 113 ... Opening / closing lever, 114 ... A groove part, 115 ... Rib, 116 ... Joint, 117 ... Lower shape, 118 ... Casing, 119 ...
Front wheel, 120: Rear wheel, 121: Suction port, 122: Pressure control plate, 123: Drain hole, 124: Full circumference R, 125
... turbine, 126 ... turbine A, 127 ... turbine B, 128 ... rotary shaft, 129 ... slide bearing, 130 ... bearing cover, 131 ... groove B, 132 ... on multi-blade nozzle, 1
33: under the multi-blade nozzle, 134: screw, 135: bell mouth portion, 136: intake port, 137: intake port a, 138 ...
Inlet b, 139... Inlet c.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Susumu Sato 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside the Taga Headquarters, Hitachi, Ltd.Electrical Equipment Division

Claims (2)

[Claims] 1. A casing having a suction passage rotatable in the vertical direction, a suction joint installed rotatably in the left and right direction at the rear of the casing, a lower case having a suction port on a lower surface, and an upper case. It has a suction body formed, a rotary cleaning body detachably mountable on the suction main body, a suction port cover removably mountable covering the rotary cleaning body, and a driving means for driving the rotary cleaning body. In the suction body having the above structure, at least one fixing knob is provided so that the suction port cover can be fixed to the suction main body, and when the suction body is viewed from above, the mating portion of the upper case and the suction port cover is positioned on the rotary cleaning body side An electric vacuum cleaner having a mouthpiece characterized by being partially curved. 2. A casing having a suction passage rotatable in the vertical direction, a suction joint installed rotatably in the left and right direction at the rear of the casing, a suction port on the lower surface, and a nozzle a for blowing air to the turbine on the outside. , A suction case formed by a lower case having at least one of the following, an upper case provided with a ventilation hole for sending air to the turbine, and a rotation shaft coaxial with a rotation shaft detachably mounted on the suction opening of the suction body. Above and outside, a rotary cleaning body provided with at least one turbine for rotationally driving, and a suction port cover having a nozzle b for blowing air to the turbine and covering the rotary cleaning body. Only when the vertical vacuum cleaner is in the upright position, the ventilation holes for sending air to the turbine installed in the upper case are A vacuum cleaner equipped with a suction body, wherein the vacuum cleaner is arranged so as to partially block the lower part, reduce the amount of air flow, reduce the number of rotations of the rotary cleaning body, or stop the rotation.