JPH0928637A - Electric vacuum cleaner - Google Patents

Abstract

(57) [Summary] [Structure] A suction body formed by disposing an upper case on a lower case having a suction port on a lower surface, a rotary cleaning body disposed on a suction port of the suction body, and the rotating body. Two turbines located on the left and right outer sides of the rotary cleaning body on the same axis as the rotary shaft of the cleaning body and for driving the rotary cleaning body, and at the rear part of the suction body, with respect to the suction body. A casing that is rotatable in the up-down direction and that has a suction passage; a suction joint arranged at the rear of the casing; and a suction-port cover that covers the rotary cleaning body.
A pair of front wheels in the radial extension of the two turbines,
The sucker body is provided with a pair of rear wheels. [Effect] Since the pair of front wheels and the pair of rear wheels are respectively arranged in the radial extension portions of the two turbines, the amount of air blown to the left and right turbines is balanced, and dust is collected. The efficiency can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner having a novel suction body.

[0002]

2. Description of the Related Art As a suction body used in an electric vacuum cleaner, the present inventors have two left and right shafts on the same axis as a rotary cleaning body disposed in a suction body having a suction port on the lower surface. We have developed a new suction body that drives the rotating cleaning body by blasting air to these two turbines.

[0003]

However, as a result of various experiments using this suction member, when the contact surface (contact angle) between the lower surface of the suction member and the cleaning surface becomes unstable, the rotation cleaning member There was a problem that the amount of air flowing through the turbines arranged on the left and right became non-uniform, and the rotational speed of the rotary cleaning body and the turbine coaxial with this became unstable (torque fluctuated), reducing the dust collection efficiency. .

Therefore, an object of the present invention is to provide an electric vacuum cleaner which stabilizes the suction body using an air turbine and improves the dust collection efficiency.

[0005]

In order to achieve the above object, a feature of the present invention is that a suction body is formed by disposing an upper case on a lower case having a suction port on a lower surface,
A rotary cleaning body disposed at the suction port of the suction body, and a rotary cleaning body located on the left and right outer sides of the rotary cleaning body on the same axis as the rotary shaft of the rotary cleaning body and for driving the rotary cleaning body. Individual turbines, a casing at the rear of the suction port main body that is rotatable in the vertical direction with respect to the suction port main body, and has a suction passage, a suction port joint arranged at the rear part of the casing, and the rotary cleaning. It has a suction port cover that covers the body,
In the lower case, there is provided a suction body in which a pair of front wheels and a pair of rear wheels are respectively arranged in a radial extension of the two turbines.

Further, in addition to the first aspect of the present invention, a feature of the present invention resides in that a roller is provided near the casing at the rear of the suction port body.

[0007]

According to the present invention, since the pair of front wheels and the pair of rear wheels are respectively arranged in the radial extension portions of the two turbines, the amount of air blown to the left and right turbines can be reduced. Balanced and dust collection efficiency can be improved.

[0008]

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

FIG. 14 is a perspective view of the appearance of an electric vacuum cleaner according to an embodiment of the present invention, in which 201 is a cleaner body in which a control circuit and an electric blower are built, and 202 is a cleaner body 201. A hose connected to the suction port portion, 203 is a hose hand portion for the user to grasp and connect the hose to one end side, 204 is an extension pipe connected to the other end side of the hose hand portion 203, and 205 is an extension pipe 204. Connected mouthpiece, 20
6 is a switch operation unit provided on the hose hand unit 203,
Reference numeral 207 denotes a first infrared light emitting portion provided on the hose hand portion 703, 208 denotes a second infrared light emitting portion provided on the hose hand portion 203, and 209 denotes an infrared light receiving portion provided on the upper surface of the cleaner main body 201. There is a ceiling 210 in the room.

Next, the operation of the vacuum cleaner according to the present invention will be described.
When one of the switch operation units 206 provided in the first unit is pressed, a signal code corresponding to the pressed switch is converted into an infrared signal as the first infrared light emitting unit 207 and the second infrared light emitting unit 20.
Emitted from 8.

The first infrared emitting section 207 is arranged so as to face substantially vertically upward in a normal use state, and the infrared signal radiated from the first infrared emitting section 207 is directed to the ceiling or wall of the room. It hits and reflects, and reaches the infrared light receiving section 209 of the cleaner body 201.

Further, the second infrared emitting section 208 is arranged at the grip end of the hose proximal part so as to face downward from substantially horizontal, and the infrared signal emitted from the second infrared emitting section 208 is It directly reaches the infrared light receiving section 209 of the cleaner body 201. The infrared signal that has reached the infrared light receiving unit 209 controls the vacuum cleaner via a control circuit built in the cleaner main body 201.

Since the vacuum cleaner according to the present embodiment controls the vacuum cleaner by transmitting the operation information input by the user to the vacuum cleaner body 201 by using the infrared signal as described above. It is possible to reduce the weight of the hose without using a power line for the hose 202.

The suction body used in such a vacuum cleaner is
A type in which a cleaning body is rotated by using a turbine that is rotated by an intake air flow of an electric blower as a drive source is mainly used.

This embodiment relates to the improvement of such a suction body, and FIG. 1 shows a suction body 2 according to an embodiment of the present invention.
2, FIG. 2 is a sectional view taken along the line AOA of FIG. 1, FIG. 3 is a top view of the suction body 205 with the suction port cover 106 removed, and FIG. 4 is a rear view of the suction body 205 in FIG. FIG. 5 is a top view of the mouthpiece 205, and FIG.
FIG.

1 to 6, the mouthpiece body 101, which is the skeleton of the mouthpiece 205, is vertically divided into two parts at a height position approximately at the center thereof, and forms a lower case 102.
And an upper case 103 disposed at the upper rear of the lower case 102.

A shock absorbing bumper 104 is attached to the outer periphery of the position where the lower case 102 and the upper case 103 are in contact with each other to maintain airtightness and prevent damage to furniture or the like.

A suction port cover 106 that covers the rotary cleaning member 115 is detachably provided in front of the upper portion of the suction port body 101.

A vertically movable casing 107 is provided at the rear end of the mouthpiece body 101, and a rotatable mouthpiece joint 108 is connected to the tip of the casing 107.

In the lower case 102, as shown in FIG.
A pair of front wheels 109 and a pair of rear wheels 110 so as to move the entire suction body 205 in the front-rear direction and maintain a constant distance between the lower surface of the suction body 205 and the cleaning surface, and a cleaning surface during use of the cleaner. Roller 111 for receiving the pressure with respect to.

A suction port 1 is provided in front of and behind the lower case 102.
Pressure control plates 112 and 113 for holding the suction pressure in 05
Are arranged.

Here, the front wheels 109 and the rear wheels 110 are arranged at positions facing each other.

Inside the suction port cover 106, there is a pair of opening / closing levers 114 that slide laterally, and by operating these, the opening / closing levers 114 can be removed from the lower case 102 and the upper case 103.

Inside the suction body 205, a rotary cleaning body 115 for scraping up dust and wiping the cleaning surface is disposed. The rotary cleaning member 115 is formed by alternately arranging a soft brush and a hard brush in a groove formed of metal such as aluminum, and a rotary shaft 116 is press-fitted at both ends thereof, and is rotated by a slide bearing 117. It is freely supported. This rotary cleaning body 115 may be formed of resin.

The slide bearing 117 is press-fitted into the bearing cover 118 and held by a pair of opposing support ribs 119 provided in the lower case 102.

The rotary cleaning body 115 used in this embodiment is formed by twisting from both ends toward the center. Further, the two rotating shafts 116 press-fitted at both ends of the rotating cleaning body 115 have a turbine 120A.
Is inserted.

Further, a turbine 120B is arranged so as to face the turbine 120A, and the turbine 120 is constituted by these two turbines 120A and 120B. The joint surface between the turbine 120A and the turbine 120B is firmly fixed by ultrasonic welding.

The turbine 120 used in this embodiment is
Thus, the two turbines 120A and 120B
By this, it becomes easy to create a mold for molding the turbine.

Next, the means for rotating the rotary cleaning member 115 will be described. FIG. 7 is a sectional view taken along the line BB of the suction port 205 of FIG. 1, FIG. 8 is a rear view of the suction port cover 106, and FIG. FIG. 10 is a sectional view taken along the line DD of FIG. 8, and FIG. 11 is a sectional view taken along the line EE of FIG.

As shown in FIG. 7, the suction body 205 of this embodiment has a large number of nozzles 121, 122 (hereinafter referred to as multi-blade nozzles 121, 12) for blowing air toward the turbine 120.
2) is disposed so as to substantially cover the outer periphery of the turbine 120.

The multi-blade nozzles 121 and 122 are arranged so as to be divided into upper and lower parts.
As shown in FIGS. 8 and 11, the lower multi-blade nozzle 122 is fixed to the lower case 1 as shown in FIGS.
02 is fixed by screws 124.

Here, the multi-blade nozzles 121 and 122 are arranged so as to blow air to the turbine 120B, and the air moves to the turbine 120A and moves to the suction port 105.
It is designed to flow into.

As described above, a pair of front wheels and 10
9 and a pair of rear wheels 110 are located so as to keep a constant clearance between the suction port 105 below the turbine 120 and the cleaning floor.

Next, the operation for rotating the rotary cleaning body 115 will be described. The air blown to the turbine 120 is a large number of air outlets provided on the rear part of the upper case 103 of the suction body 205 as shown in FIGS. Air is sucked from a rear intake port 125 having a ventilation hole and an upper intake port 126 having a large number of ventilation holes provided in an upper portion of the upper case 103 of the suction member 205.

Rear inlet 125 and upper inlet 126
Are the corners of the air inlet (the rear end of the rear air inlet 125 and the upper end of the upper air inlet 126) to ensure the strength of the air inlet itself.
The air holes are not formed in the holes. This allows
The strength of the suction port itself having a large number of ventilation holes can be ensured.

FIG. 12 is a cross-sectional view of the rear intake port 125. The rear intake port 125 is formed so as to be approximately half the plate thickness of the upper case 103, and the upper case 103 having a reduced plate thickness is formed. A vent hole 127 is formed in the intake port of the air conditioner.

A thick rib 10 is provided between the intake ports.
Since 3A is formed, even if a shock is applied to the vicinity of the rear intake port 125 or the upper intake port 126, it is protected by the rib 103A having a large plate thickness, so that the intake port having a small plate thickness can be prevented from being damaged. it can. The rib 10
Since the rib 3A itself is connected between the rib 103A and the rib 103A by a thin intake port, the rigidity of the rib 103A itself can be secured.

Further, since the ventilation hole 127 is formed integrally with the intake port of the upper case 103 so that a separate member is not used, the disassembling time of the suction member can be shortened and the recyclability is improved.

The air sucked from the rear intake port 125 and the upper intake port 126 is, as shown in FIG. 1, a partition wall 128A formed by the front walls of the lower case 102 and the upper case 103, and the lower case. An air passage 129A is formed by the outer wall of 102 and the outer wall of the upper case 103.

A partition wall 128B and a ventilation passage 129B are also formed on the front side of the rotary cleaning body 115 in the same manner.

As shown in FIGS. 1 and 7, the air sucked from the rear intake port 125 and the upper intake port 126 passes through the ventilation passage 129A and is guided by the guide wall 130 integrally formed with the lower case 102. It is narrowed down, guided to the multi-blade nozzles 121, 122, and sprayed onto the turbine 120.

Most of the air sucked from the vent holes of the rear intake port 125 and the upper intake port 126 is the multi-blade nozzle 121.
Of the multi-blade nozzle 121 and the multi-blade nozzle 122, almost no air flows.

Therefore, in the present embodiment, air is also flowed to the front side of the multiblade nozzle 121 and the multiblade nozzle 122 to make the turbine 1
In order to improve the torque of the rotating body 20 (rotary cleaning body 115), an air inlet 131 is provided on the side surface of the suction body 205 (suction port cover 106) as shown in FIGS.

Furthermore, a notch 13 is formed in the front portion of the lower surface of the mouthpiece.
2 is provided, the air sucked from the notch 132 is guided to the multi-blade nozzle 122, and the turbine 120 (rotary cleaning member 1
15) The torque is improved.

By providing the air introduction port 131, the air also flows to the front side of the multi-blade nozzle 121 and the multi-blade nozzle 122, and the turbine 120 (rotary cleaning member 11).
5) It is possible to improve the torque. The number and positions of the air introduction holes can be appropriately selected as needed. For example, an air introduction hole may be provided in the suction port cover 106 located above the turbine 120, guided to the multi-blade nozzle 121, and blown to the turbine 120.

The air blown to the turbine 120 flows through the turbine 120 as shown in FIG.
5 and is guided to the cleaner body through a casing 107 and a suction joint 108 located substantially at the center of the suction port 105.

On the other hand, the air containing dust is guided from the suction port 105 through the casing 107 and the suction port joint 108 to the cleaner body.

In the suction body 205 of the present embodiment, the air sucked from the ventilation holes of the rear suction port 125 and the upper suction port 126 of the suction body flows into the turbine 120, and the casing 107 and the suction port extend from substantially the center of the suction port 105. Since the air is sucked into the cleaner body through the joint 108, the air moves to the center while rotating at high speed in the suction port 105, and a swirling flow is generated.

According to this embodiment, the rear suction port 1 of the suction member
Since the turbine 120 and the cleaning body are rotated by the air sucked from the air holes 25 and the upper air inlet 126, and furthermore, the synergistic effect of the swirling flow generated in the air inlet 105 allows the dust to be absorbed while the dust on the cleaning surface is wound up. Dust collection performance can be greatly improved.

Further, the twisting direction of the rotary cleaning body 115 is twisted in the direction along the velocity vector of the swirling flow of the air flowing from the turbine 120 into the suction port 115. Therefore, the twisted shape of the rotary cleaning body 115 is the casing 10.
It has a substantially V-shape around the vicinity of 7.

Further, in the suction body of the present embodiment, when the suction body is lifted from the cleaning surface during use, most of the air is sucked in through the suction port 105, and the rear suction port 125 and the upper suction port of the suction unit. Since the air sucked from the vent holes of 126 is reduced, the rotational speeds of the turbine 120 and the rotary cleaning body 115 are reduced.

Thus, it is possible to solve the drawback of the conventional air turbine type suction body in which the light load causes the air turbine to rotate at a high speed to generate noise.

Further, the suction body of the present embodiment automatically selects the turbine 120 and the rotary cleaning body 115 depending on the type of cleaning surface.
Is changed.

For example, when the cleaning surface is a floor or a tatami mat, the lower surface of the suction body 205 and the floor surface are controlled by front wheels 109 and rear wheels 110 and rollers 111 provided on the lower surface of the suction body 205. Alternatively, a predetermined gap is formed in the tatami mat, the amount of air sucked from the suction port 105 increases, and the amount of air sucked from the ventilation holes of the rear suction port 125 and the upper suction port 126 of the suction body decreases.
Since the number of rotations of the rotating cleaning member 115 is reduced, the floor surface can be prevented from being damaged by the rotating cleaning member 115.

As described above, the mouthpiece of this embodiment has
Pressure control plates 112 and 113 are provided on the lower surface of the mouthpiece. Of these, the pressure control plate arranged on the rear side of the suction body
Both ends of the turbine 113 are the turbine 1 as shown in FIGS.
The cutout 20 is provided notched inward from the position of the radial extension where the cutout 20 is disposed. The pressure control plate is provided to keep the inside of the suction port airtight when the cleaning surface is brought into contact with the suction body. When the cleaning surface is a floor or a folding surface, the pressure control plate maintains the airtightness and the turbine 120 , The amount of air blown to the rotating cleaning member 115 is rotated at a high speed. If the rotary cleaning body 115 rotates at a high speed, the floor surface will be damaged. Therefore, both ends of the pressure control plate 113 are cut off to reduce the amount of air blown to the turbine 120. Notches of the pressure control plate are not limited to both ends, but may be provided at a plurality of locations with a certain interval.

When the cleaning surface is a carpet, the lower surface of the suction body 205 is in close contact with the carpet, and the suction port 105
Reduces the amount of air sucked in from the rear intake port of the suction body
Since the amount of air sucked from the ventilation holes of the upper air inlet 125 and the upper air inlet 126 increases, the turbine 120 and the rotary cleaning body 11
As the number of rotations increases, a swirling flow is generated.

As a result, the dust on the carpet can be scraped out by the rotary cleaning member 115 and further swirled up by the swirling flow, thus improving the dust collection efficiency.

As described above, in the suction body of this embodiment, the rotational speeds of the turbine 120 and the rotary cleaning body 115 are automatically changed depending on the type of cleaning surface, so that the suction port of the conventional air turbine type is adopted. A switch lever for manually switching the amount of air blown to the air turbine according to the cleaning surface required for the body is not required, and operability is improved.

The front wheel 1 is provided on the lower surface of the mouthpiece of this embodiment.
09 and rear wheels 110 are five-point wheels in which rollers 111 are disposed at radially extending portions of the left and right turbines 120 and at the rear central portion, respectively.

This is because when the contact surface between the lower surface of the suction body and the cleaning surface becomes unstable, the amount of air flowing through the turbines 120 arranged on the left and right of the rotary cleaning body 115 becomes uneven.
The rotation speeds of the rotary cleaning body 115 and the turbine 120 become unstable (the torque fluctuates), and the dust collection efficiency decreases.

Therefore, in order to keep the contact surface between the lower surface of the suction body and the cleaning surface stable so that the air can uniformly flow to the turbine 120, a five-point wheel is used.

As a result, the amount of air flowing through the left and right turbines 120 becomes substantially uniform, the rotational speeds of the rotary cleaning body 115 and the turbine 120 are stabilized, and the dust collection efficiency can be prevented from lowering.

Next, a method for maintaining the mouthpiece of this embodiment will be described.

As described above, the suction body 205 of this embodiment has the suction port cover 10 on the upper portion of the suction port 105 of the suction body.
6 are provided. The suction port cover 106 has an opening / closing lever 114 that slides laterally inside the suction port cover 106, and by operating this, the lower case 1
02 and the upper case 103. In addition, a concave portion 133 is formed on a side surface of the suction body 205 (suction port cover 106). Then, the suction port cover 10
In order to remove 6, the index finger or the middle finger is first inserted into the concave portion 133, the thumb is hooked on the opening / closing lever 114, and the opening / closing lever 114 is slid outward to release the engagement. Remove while picking. At this time, the multi-blade nozzle 121 is fixed to the back surface of the suction port cover 106, and the multi-blade nozzle 122 is also screwed to the lower case 102.
Cleaning is possible by removing only 0, and the usability is extremely good.

According to this embodiment, since the concave portion 133 is provided on the side surface of the suction body 205 (suction port cover 106), the index finger or the middle finger is inserted into the concave portion 133 and the thumb is hooked on the opening / closing lever 114. , Open / close lever 114
Is disengaged by sliding outwardly, and is gripped with the thumb and the index finger (middle finger), and the suction port cover 106 is moved to the suction body 2.
It can be easily removed from 05.

Further, according to the present embodiment, since the opening / closing lever 114 that slides in the lateral direction is provided inside the suction port cover 106, the opening / closing lever 114 is protected from external force even when it comes into contact with furniture or the like during cleaning. 114 can be protected.

Furthermore, according to the present embodiment, the rotary cleaning member 115 using a metal for the rotary shaft can be easily removed together with the turbine 120, so that the disassembling time of the suction member can be shortened and the metal portion and the plastic portion can be shortened. Therefore, the recyclability can be significantly improved.

[0068]

As described above, according to the present invention, since a pair of front wheels and a pair of rear wheels are arranged in the radial extension portions of two turbines, the left and right turbines are arranged. The amount of air blown to the balance can be balanced and the dust collection efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a top sectional view of a mouthpiece 205 according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AOA in FIG.

FIG. 3 is a top view of the suction body 205 with the suction port cover 106 removed.

FIG. 4 is a rear view of the mouthpiece 205 in FIG.

FIG. 5 is a top view of the mouthpiece 205.

FIG. 6 is a bottom view of the mouthpiece 205.

FIG. 7 is a cross-sectional view taken along the line BB of the mouthpiece 205 of FIG.

FIG. 8 is a rear view of the suction port cover 106 of the suction body 205.

9 is a rear view of the suction port cover 106 (partly a cross-sectional view taken along line CC in FIG. 5).

FIG. 10 is a sectional view taken along the line DD in FIG. 8;

11 is a sectional view taken along the line EE in FIG. 8;

FIG. 12 is a partially enlarged view of a rear intake port 125;

FIG. 13 is a side view of the mouthpiece 205.

FIG. 14 is a perspective view showing the appearance of a vacuum cleaner according to one embodiment of the present invention.

[Explanation of symbols]

101: suction body, 102: lower case, 103: upper case, 105: suction port, 106: suction port cover, 107 ...
Casing, 108 ... Suction joint, 109 ... Front wheel, 11
0: rear wheel, 111: roller, 114: open / close lever,
115 ... rotating cleaning body, 116 ... rotating shaft, 120 ... turbine, 121, 122 ... multi-blade nozzle, 125 ... rear intake port,
126: upper intake port, 128A, 128B: partition wall, 1
29A, 129B ... ventilation path, 130 ... guide wall, 131 ...
Air inlet 132, notch, 133, concave, 201
.., Vacuum cleaner body, 202, hose, 203, hose hand, 204, extension tube, 205, suction body, 206, switch operation unit, 207, first infrared light emitting unit, 208, second infrared light emitting unit, 209 , 210 ... indoor ceiling.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadayuki Hoshi 4-6, Surugadai Kanda, Chiyoda-ku, Tokyo Inside Hitachi, Ltd.

Claims (2)

[Claims] 1. A suction body formed by disposing an upper case on a lower case having a suction port on a lower surface, a rotary cleaning body disposed on a suction port of the suction body, and a rotation of the rotary cleaning body. Two turbines that are located on the left and right outer sides of the rotary cleaning body on the same axis as the shaft and that drive the rotary cleaning body, and at the rear of the suction body, rotate in the vertical direction relative to the suction body. The casing is movable and has a suction passage, a suction joint arranged at a rear portion of the casing, and a suction inlet cover that covers the rotary cleaning body. An electric vacuum cleaner comprising: a suction member having a pair of front wheels and a pair of rear wheels disposed at a radially extended portion of a turbine. 2. The electric vacuum cleaner according to claim 1, wherein a roller is arranged near the casing at a rear portion of the suction body.