JP3421582B2 - Electric vacuum cleaner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner, and more particularly, to an electric vacuum cleaner having a suction member for enhancing dust and dust collecting ability on a floor in a corner of a room and near a wall, a tatami mat or a carpet. It is a thing.

[0002]

2. Description of the Related Art Some conventional vacuum cleaners transmit the rotation of an impeller in a suction port to a rotary brush via a pulley or a belt and use the rotation to collect dust on a carpet. . Therefore, there is a part in front of the rotating brush where the brush does not come into contact with the surface to be cleaned, and there is a problem that dust on the carpet, especially near the wall, is difficult to remove.

Therefore, as described in Japanese Utility Model Laid-Open No. 6-31641 and Japanese Utility Model Laid-Open No. 63-103853, a recess is provided on the bottom surface of the case in front of the mouth to make air flow easier and collect dust on the wall. There was something to try. Further, as described in Japanese Utility Model Laid-Open No. 3-128046, there is proposed a mouthpiece in which a concave portion is provided in front of the mouthpiece and a rotary brush is provided therein.

[0004]

However, among the above-mentioned problems of the prior art, in the case where the recess is provided on the bottom surface, dust on the wall can be removed on a wooden floor or the like, but thread entangled on the carpet, There was a problem that it was difficult to remove hair. Furthermore, since the velocity of the air at the center of the suction port is small near the wall on the wooden floor, there is a problem that heavy dust with high density is difficult to remove.

For this reason, it is necessary to change the position of the suction port and perform cleaning many times. Also, in the case where the rotating brush is provided at both ends of the suction port, although the dust entangled in the carpet is easily removed, the rotating brush itself becomes large, and a means for transmitting the rotational force to the rotating brush is required, so that the suction port is large and There was a problem that it became heavy.

An object of the present invention is to provide an electric vacuum cleaner provided with a small and lightweight suction body which has a high dust collecting power for dust in the corners and walls of a room.

[0007]

In order to achieve the above object, the features of the electric vacuum cleaner of the present invention are:
A plurality of concave flow paths are provided on the bottom surface of the suction body for cleaning the surface to be cleaned so that the front side of the suction body and the bottom opening of the suction body communicate with each other. It is to provide a blade that has.

Specifically, the present invention provides the following device.

The present invention relates to an electric vacuum cleaner equipped with a suction body for cleaning a surface to be cleaned by utilizing suction airflow generated by an electric blower, in which the suction body front side and the suction body bottom surface opening are provided on the bottom surface of the suction body. An electric vacuum cleaner is provided, in which a plurality of concave flow paths are provided to communicate with the parts, and a brush or a flexible blade is provided at a substantially center of the width of each of the concave flow paths.

Further, according to the present invention, in an electric vacuum cleaner using a suction body for cleaning a surface to be cleaned by utilizing suction airflow generated by an electric blower, a plurality of recesses are provided in a bumper in front of the suction body. Further, a plurality of concave flow paths are provided on the bottom surface of the suction body to communicate the respective recesses with the bottom surface opening of the suction body, and a brush or a flexible blade is provided substantially in the center of the width of each of the concave flow paths. An electric vacuum cleaner is provided.

Preferably, each of the concave flow paths is provided obliquely toward the opening on the bottom surface of the suction body.

Preferably, the width of each concave channel is 8 mm.
To 20 mm.

Preferably, the depth of each concave channel is 2 m.
m to 6 mm.

Preferably, the width of each concave portion of the bumper is larger than the width of each concave flow passage.

Preferably, there is provided means for detecting the surface to be cleaned and moving the concave flow path including the brush or the flexible blade up and down.

Further, according to the present invention, in a suction body of an electric vacuum cleaner for cleaning a surface to be cleaned by utilizing a suction airflow generated by an electric blower, a suction cover, a lower case, a front side of the suction cover and the above. Compare the amount of suction airflow when the front side of the mouthpiece cover comes into contact with a corner or wall with the amount of suction airflow when cleaning the flat surface to be communicated with the bottom case bottom opening. An electric cleaning device having a plurality of concave flow paths for increasing the number of the flow paths, and a brush or a flexible blade which is provided substantially in the center of the width of each of the concave flow paths and scrapes dust on the surface to be cleaned. Provide a sucker for the machine.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An electric vacuum cleaner according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a perspective view of a suction body of an electric vacuum cleaner according to a first embodiment of the present invention. Reference numeral 101 is a lower case, 102 is an upper case, 103 is a suction cover, 104 is a rotating brush, and four rows are provided. 105 is an impeller, which is provided on each of the left and right sides. There are one set on the left and right, which are composed of blades, and 107 is a concave flow path provided in the lower case 101, and there are five locations on the front bottom surface of the lower case. It has been stopped.

The brush 108 is made of a plastic material having a low frictional resistance, particularly a large number of nylon fibers. 109 is a keeper integrated with the bumper 222, 110 is a mouthpiece joint, 111 is a mouthpiece of the mouthpiece joint 110,
112 is an air intake port for taking in air from the outside, 1
Reference numeral 13 is a brush chamber for housing the rotating brush 104.

FIG. 2 shows a plan view of the suction port as seen from below. Two
Reference numeral 21 is a floor opening provided in the lower case 101, and 222 is a bumper which also serves as a keeper, which is made of a soft plastic resin. 223 and 224 are wheels, and 225 is a keeper having flexibility.

FIG. 3 shows a BB cross section of FIG. 301 is a brush shaft, and the base of the four brushes 104 is the brush shaft 301.
It is sandwiched and stopped in the groove provided in. Further, the air flows into the joint flow path 301 from the brush chamber 113. Further, the casing 114 and the joint 110 each have a 90 degree bend in the flow path portion, and the casing 114 and the joint 110 are rotatably provided.

FIG. 5 shows the appearance of the electric vacuum cleaner of the first embodiment. Reference numeral 501 is a vacuum cleaner body, 503 is a switch operating portion arranged at the hand portion of the hose, 504 is an extension tube, and 505 is a suction body.

Next, the operation of the first embodiment of the present invention will be described.

When the user of the vacuum cleaner operates the switch operation unit 503 at the base of the hose, the electric blower in the main body 501 of the electric vacuum cleaner is operated in the operation mode according to the operated switch. The suction force of the air generated by the electric blower passes through the hose 502 and the extension pipe 504 and the suction body 505.
To reach. The dust sucked by the mouthpiece 505 is the extension pipe 5
04, through the hose 502, it is carried to the vacuum cleaner main body 501 and accumulated in the dust collecting portion provided in the main body.

In the suction body 505, the flow of air is collected in the suction port 111 mainly through two paths and is conveyed to the vacuum cleaner body 501 through the suction joint passage 302.

First, the first air flow is from the surface to be cleaned, and when the suction body 505 is used on a carpet, an elastic keeper 109 made of a rubber material is used. Since 225 and 225 sink into the carpet and are deformed at the same time, most of the first air flow passes through the concave flow path 107 provided in front of the lower case 101,
It flows into the brush chamber 113 through the floor surface opening 221, and is collected in the suction port 111.

The second air flow is a flow of air from an opening provided in the case, and the upper case 102
Air is taken in through the air intake ports 112 provided on the upper and rear surfaces of the nozzle, accelerated by the nozzle 106, sprayed on the impeller 105, given a rotational force to the impeller, and then flows into the brush chamber 113.

In the brush chamber 113, the rotary brush 104 provided coaxially with the impeller 105 is rotated to scrape up the bristles of the rug and remove the dust adhering to the rug from the rug.

At this time, the flow of the first air and the flow of the second air are combined so that the separated dust is sucked into the suction port 11.
A stream of transporting to 1 is formed. In addition, the concave channel 1
Also in 07, the dust attached to the carpet is peeled off as will be described later and flows into the brush chamber 113 together with the flow of air.

When the suction body 505 is used on the floor or tatami mat, the keeper 109, 225 made of an elastic body comes into contact with the floor surface, and the inflow of air from the part where the member of the keeper 109, 225 is present is obstructed. As a result, the inflow area of air is reduced, and as a result, the velocity of air flow up to the floor surface opening 221 can be kept high. Since the floor surface opening 221 is not blocked on the floor or tatami mat, the flow rate of the first air flow is higher than that on the carpet, but basically the air flow on the carpet is A similar flow is formed.

Further, as shown in FIG. 4, the brush 108 is locked to the lower case 101.

The effects peculiar to the first embodiment will be described below. When it is on the floor, the concave flow path 107 and the keeper 109 are notched, so that dust such as rice grains can easily pass through and lumpy dust is easily collected.

Furthermore, since the concave flow path 107 is provided obliquely, the amount of air inflow from both end sides of the suction body 505 increases, and as a result, when the suction body 505 moves forward, Outside, dust approaching the keeper 109 is likely to move to the center side of the front surface of the suction port, and dust that has flowed into the concave channel 107 is opened on the floor surface 22 of the suction member 505.
It becomes easier to gather in the center of 1.

At this time, if the keeper 109 is installed not only in parallel with the front surface of the mouthpiece but also diagonally installed so that both front ends are in front and the center side is in back, it is possible to promote the collection of dust in the center. It is more effective because it is done. Further, when the suction body 505 is moved laterally on the floor or tatami, the keeper 109 can easily escape back and forth, so that it is possible to obtain an effect that the floor and tatami are less likely to be damaged.

On the tatami mat, the pressure inside the mouthpiece becomes a negative pressure, so the front side of the tatami floats up to the mouthpiece side, but the concave flow path 10
Since the brush 108 provided in 7 prevents the tatami mat from rising, damage to the tatami mat caused by rubbing the tatami mat with a hard object can be alleviated.

On the carpet, the suction body 505 sinks into the carpet due to its own weight or negative pressure in the suction body, and the keepers 109 and 225 are deformed so that the bottom surface of the lower case comes into contact with the carpet. . Therefore, there is an effect that the dust in front of the suction body can be easily transported into the suction body through the concave channel 107. In particular, the width of the concave flow path 107 is required to be 8 mm to 20 mm in order to pass rice grains found in homes.

Further, the keeper 109, 225 is the suction body 50.
Since it is in front of and behind No. 5, when the suction body 505 is moved back and forth, the user usually cleans while moving the suction body 505 back and forth, but since the keeper 109, 225 gets up when the direction is reversed and changes direction, The lower case 101 of the mouthpiece 505 rises above the carpet for a short time. At that time, since a gap is formed in a portion of the keeper 109, 225 that is in contact with the carpet, a piece such as paper cut by hand can be conveyed into the mouthpiece.

On the carpet, the concave flow path 107 provided in the lower case 101 serves as a flow path for air, and the brush 108 provided at the center of the flow path comes into contact with the hair of the carpet, so that the brush 108 is entangled in the carpet. It is possible to scrape fibers such as cotton and the like, hairs, animal hairs, lint, and the like, and convey them by air flowing through the concave channel 107.

Further, since the brush 108 is deformed by contacting with the carpet, when viewed as a collection thereof, irregularities are formed in the air flow direction (direction of the concave flow path). Therefore, the flow is disturbed near the brush 108, and as a result,
Since the air flows at a certain angle in the fibers that are fluttered in the air and aligned in the flow direction, the fluid force acts on the fibers, etc., and the force fluctuates with time, so the strength of the force Fluctuates with time, so that the action of unraveling the fibers entangled in the hair of the carpet can be obtained, and the effect of further promoting the peeling of dust can be obtained.

Further, the brush 108 is formed integrally with the lower case 101, and the impeller 105 and the rotating brush 104 are provided.
Since and are coaxial, no electric parts or gears are used, so that the suction body 505 can be dipped in water for washing.

When the suction body 505 comes close to the wall, an air flow path is newly formed on the front side of the suction body by the lower case 101 of the suction body 505, the bumper 222, the floor, and the wall.
Therefore, the air resistance on the front side of the suction body increases.

The entrance of the air from the outside to this flow path is
A lower case 101 on both sides of the suction port, a bumper 222, a floor, a first entrance formed by a wall, and a plurality of second entrances formed by a recess and a wall of the bumper 222.

Since the dust near the wall is a state in which dust is accumulated, the dust is evenly distributed along the wall near the wall.

The flow of air at the first inlet enters from both ends in front of the mouthpiece, and mostly goes from the outside of the keeper 109 of the lower case 101 to the brush chamber 113, and part of the air flows toward the center in front of the mouthpiece. Air from the second inlet formed by the bumper concave portion and the wall is added to this, and it goes to the brush chamber 113 through the notch of the keeper 109, and part of it goes toward the center side in front of the suction body. The air flows from both sides collide with each other in the center, but since the second entrance is also provided in the center, dust collected in the center together with the air is sucked in from the center.

Therefore, since the airflow velocity can be increased even in the front center portion of the suction body 505, the effect that the dust having a high density can be efficiently sucked even if it is near the wall.

Further, since the air from the second entrance has a strong velocity component toward the floor when passing through the bumper portion,
Since air is blown onto the floor, this also has the effect of increasing the air velocity on the surface to be cleaned and promoting the separation of dust.

These effects can be obtained similarly even when the surface to be cleaned is a wooden floor, a tatami mat, or a carpet. Especially, when air is blown onto the floor near the wall, the air velocity near the carpet is large. At the same time, since the flow is disturbed by the collision, a fluid force whose direction changes with time is exerted on the cotton dust fibers, and the action of loosening the entanglement between the cotton dust fibers and the carpet fibers is obtained, which promotes the dust collection. The effect of doing is obtained.

In the first embodiment, as described above, since the rotary brush 104 has a mechanism for removing dust in front of it, cotton dust and the like on the wall can be removed by the action of the brush 108, etc. The unsucked width can be reduced.

Further, when the casing 114 is raised vertically, the joint 110 forms 90 degrees with the casing 114, and the suction body 505 is moved along the wall for cleaning, the brush 108 provided in the concave channel 107 is removed. When the mouthpiece 505 moves to the left and right, it deforms in the direction opposite to the movement, so that the tip of the brush reaches the outside of the area where the brush 108 is planted, and as a result, at the portion where the brush is in contact. In addition to facilitating the collection of dust such as cotton dust, it is possible to obtain an effect that dust on the wall can be easily removed in a wider area.

In the first embodiment, the suction body 505 is used.
The brush 108 is projected 0.5 mm from the bottom surface, but the amount of projection is preferably in the range of 0 mm to 1 mm.

Further, the entrance of the concave flow path 107 on the bottom has a rounded shape, which is effective in suppressing the separation of the flow at the entrance when air flows through the concave flow path 107, and the It can prevent the increase.

Further, the brush 108, as shown in FIG.
It may be sandwiched in the lower case 101 as a separate member. By sandwiching the base portion 401 of the brush 108 between the projections 402 and 403 of the lower case 101, the base portion 401 of the brush moves laterally.
Since the deformation amount can be increased, when the suction body 505 is near the wall, an effect that the dust collection range of cotton dust and the like can be further widened is also obtained.

Further, as shown in FIG.
Since the brush 108 is integrally provided with the lower case 101, the base portion of the brush 108 is unnecessary, and therefore the concave flow path 10
7 can be taken widely. Also, as shown in FIG.
An elastic and flexible thin plate-shaped member, that is, a blade 701 is installed in the concave channel 107 in the lower case 10.
There is also a method of installing it together with 1. When the blade 701 comes into contact with the hair of the carpet and the mouthpiece 505 moves, the hair of the carpet is struck and the cotton dust clinging to the carpet and peeling from the carpet such as hair are promoted to form a concave flow path. The dust flowing into the suction port can be carried by the air flowing through.

In the case of the blade 701, since the rigidity can be made larger than that of the brush 108, the force for hitting the bristles of the carpet can be made larger, so that the dust collecting ability can be improved without the scraping effect. In the case of the blade 701, it is desirable to use a material having a small frictional resistance. Specifically, a synthetic rubber having improved slipperiness and a soft plastic resin containing PTFE (polytetrafluoroethylene) are preferable.

Further, since the blade 701 is sometimes flipped up by the hair of the carpet, a gap is created between the blade 701 and the carpet for a short time, and dust trapped between the two is carried by air. So blade 7
No garbage will be caught between 01 and the carpet. Further, since the blade 701 is installed obliquely with respect to the suction body 505, it is possible to prevent the floor and tatami from being damaged when the suction body 505 is moved back and forth or left and right.

Even when the suction body 505 is located near the wall, the same effect as that of the brush 108 can be obtained.

Further, as shown in FIG. 8, the lower case 10
It is also possible to provide a projection 801 that is integral with the unit 1. In this case, since the protrusion 801 also serves as a strength member, the suction body 505 is
It also has the effect of strengthening against damage to. The protrusion 801 is the same as the bottom surface of the lower case 101, in other words,
The amount of protrusion from the bottom surface is 0 mm. This is to prevent the projections from coming into contact with the floor surface such as a wooden floor and damaging the floor surface.

Since the mouthpiece 505 sinks on the carpet, the projection amount of the projection 801 may be above the bottom surface, or may be from -1 mm to 0 mm. In this case, since the protrusion 801 is higher than the bottom surface, it is possible to obtain an effect that the floor surface is less likely to be damaged.

Since the protrusion 801 can have much higher rigidity than the blade 701, the force of hitting the carpet when the suction body 505 moves on the carpet can be increased, so that the dust on the carpet can be more easily peeled off. Can be promoted. Since the suction body 505 has its own weight or a negative pressure inside the suction body, the bottom surface of the lower case 101 sinks into the carpet, and the projection 801 is in contact with the carpet to operate.

Since the projection 801 is always in contact with the carpet, the dust sandwiched between the two is difficult to peel off.
At the time of reversing the direction of the mouthpiece 505, the mouthpiece 505 floats from the carpet when the deformation direction of the keeper is changed, so that it is peeled and conveyed at this time. Also, when the suction body 505 is located near the wall, the same effect as that of the brush 108 or the blade 701 can be obtained.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 9 shows a plan view of the vacuum cleaner according to the second embodiment of the present invention as seen from below the suction body. A flexible keeper 225 and a keeper 901 are locked to the lower case 101. Also, the lower case 101
Integral with the lower case 101, there are five concave flow paths 90 on the bottom surface.
2 is provided, and a brush 903 is provided at the center of the concave channel 902.
Are planted in rows.

Between the lower case 101 and the upper case 102, a bumper 904 which is an elastic body and has a good slipperiness is sandwiched.

FIG. 10 is a sectional view taken along line CC of the suction body 505 of FIG. 9, and particularly shows the bottom surface portion. The width of the concave flow path 902 is 10 mm, and the tip of the brush 903 has the same height as the bottom surface of the lower case 101. The rotary brush 104 has four flexible blades. Next, the operation of the second embodiment of the present invention will be described.

In the suction body 505, the air flows into the floor surface opening 22.
From 1 to the brush chamber, collected in the suction port of the suction joint 110, and conveyed to the electric vacuum cleaner body 501 via the flow path in the suction joint 110.

When the mouthpiece body 505 is used on a carpet, the flow of air from the surface to be cleaned is such that elastic keepers 901 and 225 made of a rubber-based material sink into the carpet at the same time. Since it is deformed, most of the flow is due to the concave channel 9 provided in front of the bottom surface of the lower case 101.
02, flows into the brush chamber through the floor surface opening 221, and is collected in the suction port of the suction port joint 110.

In the brush chamber 113, the rotating brush 104
By rotating the, the hair of the rug is scraped up, and the dirt attached to the rug is removed from the rug.

When the suction body 505 is used on the floor or tatami mat, the keeper 901, 225 made of an elastic body comes into contact with the floor surface, and the inflow of air from the part where the member of the keeper 901, 225 is present is obstructed. As a result, the inflow area of air is reduced and the static pressure in the suction port is increased. As a result, the floor surface opening 221
You can keep the velocity of the air flow high in the parts up to. The flow in the mouthpiece 505 is basically the same as the flow of air on the carpet.

When the suction body 505 is near the wall, an air flow path formed by the wall, the lower case 101, the surface to be cleaned and the bumper 901 is formed on both sides of the suction body 505. Since the bumper 901 is configured to project from the center when viewed from the front, a gap is formed between the wall and the bumper 901 on both sides of the suction body 505, so that static pressure is suppressed.

The effects peculiar to the second embodiment will be described below. In the second embodiment, the same effect as that of the first embodiment can be obtained, but in particular, the suction body 505.
Is moved in the longitudinal direction of the mouthpiece 505, in other words, in the lateral direction, so that at the wall on the rug, the brush 903 on the bottom of the mouthpiece causes the fluffing action of the rug on the carpet to
The separation of cotton dust, hair, etc. from the carpet hair is promoted, and the action of high-speed airflow through the concave channel 902 is also added, so that cotton dust, hair, etc. can be removed well.

In the second embodiment, the concave channel 90 is used.
It is possible to increase the number of 2's, which can increase the hammering-out action of dust. Further, since the static pressure in the suction body is reduced, the static pressure in the suction body is 500
It is desirable to set it so as to be between Pa and 2000 Pa together with the notch of the keeper 901.

Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 11 shows a plan view of the vacuum cleaner according to the third embodiment of the present invention as seen from below the suction body. A flow path adapter 1101 is attached to the lower case 101 of the suction body 505 so as to be vertically movable. The flow path adapter 1101 is provided with five concave flow paths 1103, 1105, 1108, 1110, 1112, and the brushes 1103, 1105, 1106, 110.
7, 1109 and 1111 are provided near the center of each concave channel.

The flow path adapter 1101 is pressed against the surface to be cleaned by a spring. Central concave channel 1
Two brushes 1106 and 1107 are provided on 108. Each of these brushes projects 1.5 mm from the bottom surface of the flow path adapter 1101 toward the surface to be cleaned. 11
20 is a bumper made of an elastic material and good in slipperiness,
1113, 1114, 1115, 1116 are wheels, 22
5 is a plate-like keeper made of a flexible material, 104
Is a rotating brush with four blades made of flexible material, and 110 is a mouthpiece joint.

FIG. 12 shows a DD cross section of FIG. 1
201 is an upper case, 1203 is a plate-like plate that has a notch protruding to the bottom side integrally with the bumper 1120,
1202 is a brush chamber.

FIG. 13 shows a cross section of the flow path adapter 1101. The flow path adapter 1101 is the base 1 of the brush 1301.
The configuration is such that 302 is sandwiched between the upper adapter 1303 and the lower adapter 1304, and the brush 13 is placed on the lower adapter 1304.
No. 01 is placed, the upper adapter is covered from above, and both are fixed with a stop pin or the like, so that it can be easily manufactured.

Next, the operation of the third embodiment of the present invention will be described.

In the suction body 505, the air flows into the floor surface opening 22.
1, the brush chamber 1202 enters the brush chamber 1202, is collected in the suction port of the suction joint 110, and is conveyed to the electric vacuum cleaner body 501 via the flow path in the suction joint 110.

The air flow from the surface to be cleaned is such that when the mouthpiece body 505 is used on a carpet, the bumper 1
Since the plate-shaped plate 1203 of 120 and the keeper 225 sink into the carpet and are deformed at the same time, most of the flow is in the five concave flow channels 1103, 1105 of the flow channel adapter 1101 provided in front of the bottom surface of the lower case 101. , 11
08, 1110, 1112, through the floor surface opening 221, flows into the brush chamber 1202, and is collected at the suction port of the suction joint 110.

Further, the flow path adapter 1101 includes the spring 12
Since the brush 1107 is pressed against the surface to be cleaned by the brush 03, the brush 1107 scrapes up the bristles of the rug, and removes the dust adhering to the rug from the rug.

When it is used on the floor or tatami mat, the plate-shaped plate 1203 of the keeper 225 and the bumper 1120 comes into contact with the floor surface, and the air from the part where the plate-shaped plate 1203 of the keeper 225 and the bumper 1120 is present. Is blocked, the air inflow area is reduced, the static pressure in the suction body is increased, and as a result, the velocity of the air flow up to the floor opening 221 can be kept high. The flow in the mouthpiece is basically the same as the flow of air on the carpet.

When the suction body 505 is near the wall, a first air flow path formed by the wall, the lower case 101, the surface to be cleaned and the bumper 1120 is formed on both sides of the suction body 505, and the bumper concave portion is formed. A second air flow path is formed between the wall and the wall. A wide air intake port is formed in front of the suction port by the second flow channel, so that the static pressure in the first flow channel and the second flow channel in front of the suction port body 505 is suppressed when coming near the wall. .

The effects peculiar to the third embodiment will be described below.

Basic effects can be obtained in the same manner as in the first embodiment. Further, since the flow path adapter 1101 is pressed against the surface to be cleaned, the brush comes into contact with the floor surface on the wooden floor and rubs the floor surface, so that a wiping effect is obtained. On the other hand, since the flow path adapter 1101 is pushed upward on the carpet, the contact force between the brush and the carpet can be reduced, and the operation force during the cleaning operation can be further reduced.

Next, a fourth embodiment of the present invention will be described with reference to the drawings.

FIG. 14 is a plan view of the vacuum cleaner according to the fourth embodiment of the present invention as seen from below the suction body. The suction port 505 is provided with central channels 1414 and 1420, and the concave channel 1 is formed so as to be obliquely connected to the channels.
403, 1405, 1407, 1410, 1402 are provided, and the concave flow paths 1403, 1405, 1407, 14 are provided.
The brushes 1404, 1406, 1411, and
1413 is embedded in the lower case 101. Also,
Brushes 1408 and 1409 are embedded in the concave flow path 1407, and both are arranged so as to partially overlap when viewed from the front of the central flow path 1414.

A wiping brush body 141 is provided at the mouth of the mouthpiece body 505.
6 is provided and is pressed against the bottom surface side by the spring from the suction body 505.

FIG. 15 shows a cross section taken along line EE of FIG. An elastic bumper 1417 is provided so as to be sandwiched between the upper case 1510 and the lower case 101.
A flexible plate-shaped plate 1505 is integrally provided at 417. The plate 1505 has cutouts such that the bottom portion of each concave flow path is shorter on the upper case side than each concave flow path.

The wiping brush 1416 has a brush 1502 sandwiched by a frame 1503 and is pressed downward in the drawing by a spring 1504.

Next, the operation of the fourth embodiment of the present invention will be described.

In the suction body 505, the air flows through the central flow path 14
It is collected from 14, 1420 to the suction port of the suction joint 110, and is conveyed to the electric vacuum cleaner body 501 via the flow path in the suction joint 110.

The flow of air from the surface to be cleaned is the suction port 5
When 05 is used on the carpet, bumper 14
Since 17 plate-shaped plates 1505 and wiping brushes 1416 sink into the carpet and are deformed at the same time, most of the flow is five concave flow paths 1403, 1405, 140.
7, 1410, 1402 through the central channel 1414, 1
It flows into 420 and is collected at the suction port of the suction joint 110.

When used on the floor or tatami mat, the plate 1505 of the bumper 1417 and the brush body 1416 contact the floor surface, and the inflow of air from the portion where the plate 1505 of the bumper 1417 and the member of the wiping brush body 1416 are present. Is blocked, the inflow area of air is reduced, the static pressure in the suction body is increased, and as a result, the velocity of air flow can be kept high. The flow in the suction body 505 is basically the same as the flow of air on the carpet.

The effects peculiar to the fourth embodiment will be described below.

The flow of the second air flow path near the wall goes from the upper side toward the surface to be cleaned, passes through the notch of the plate-like plate 1505 of the bumper 1417 after being disturbed by colliding with the surface to be cleaned. Head into the mouthpiece. Therefore, the velocity in the vicinity of the surface to be cleaned can be increased, and the flow direction changes due to the turbulence, so that the fluid force that changes the direction acts on the dust.
As a result, the separation of dust from the surface to be cleaned can be promoted, and the dust collection performance of heavy dust having a high density on the floor, such as small stones, can be improved. Also,
At the wall on the carpet, the fluid force such as cotton dust that changes direction is exerted, so that the action of unraveling the cotton dust entangled in the hair of the carpet is released, and the dust such as cotton dust can be cleaned well.

Further, even when it comes to the side of the wall, the velocity of the air flow becomes uniform in front of the suction body, so that dust can be uniformly taken in the length direction of the suction body 505.

Further, by moving the suction body 505 in the longitudinal direction of the suction body 505, in other words, in the lateral direction, by the knocking action of the carpet hair of the projection on the bottom of the suction mouth on the wall above the carpet, cotton dust, hair, etc. are removed. The peeling of the carpet from the hair is promoted, and the action of a high-speed air flow through the concave flow path is also added, so that cotton dust, hair, etc. can be removed well.

At this time, the larger the number of concave flow paths, the more the dust spilling action increases, but the static pressure in the suction port decreases, so the static pressure in the suction port falls from 500 Pa to 2 Pa.
It is desirable to set it so as to be between 000 Pa and the notch of the plate 1505 of the bumper 1417.

Further, since the wiping brush body 1416 is pressed against the surface to be cleaned, the brush 1502 rubs the floor surface on the wooden floor, so that the wiping effect can be obtained. Since the wiping brush 1416 is pushed upward on the carpet, the contact force between the brush 1502 and the carpet property of the brush 1502 is reduced, and the operation force during the cleaning operation can be reduced.

[0098]

According to the present invention, by providing a concave flow path having a brush or a blade having flexibility on the bottom surface of the mouthpiece, it becomes easy to collect not only normal dust but also massive dust. Further, in the corner of the room, the inflow of air from the front of the suction body becomes large, and along with this, due to the action of scraping the brush or the blade having flexibility, cotton dust,
Since the dust collection power of hair, lint, etc. can be increased, dust can be collected even in the corners of the room and the cleaning performance of the corners can be improved.

Further, since the flow input of the inflowing air is utilized without providing a dedicated drive source for cleaning the corners and the vicinity of the wall,
It is possible to reduce the size and weight of the mouthpiece.

[Brief description of drawings]

FIG. 1 is a perspective view of a suction body of an electric vacuum cleaner according to a first exemplary embodiment of the present invention.

FIG. 2 is a plan view of the suction body of FIG. 1 seen from the bottom surface.

3 is a cross-sectional view taken along line BB of the suction body of FIG.

4 is a cross-sectional view taken along the line AA of the suction body of FIG.

5 is an external view of an electric vacuum cleaner including the suction body of FIG.

FIG. 6 is a view showing another example of the AA cross section of the mouthpiece of FIG.

FIG. 7 is a diagram showing another example of the AA cross section of the suction body of FIG.

FIG. 8 is a view showing another example of the AA cross section of the mouthpiece of FIG.

FIG. 9 is a plan view of the vacuum cleaner according to the second exemplary embodiment of the present invention as seen from below.

10 is a cross-sectional view taken along line CC of the suction body of FIG.

FIG. 11 is a plan view of the vacuum cleaner according to the third embodiment of the present invention as seen from below the suction body.

12 is a cross-sectional view of the suction body of FIG. 11 taken along the line D-D.

13 is a cross-sectional view of the flow path adapter of FIG.

FIG. 14 is a plan view of the vacuum cleaner according to the fourth exemplary embodiment of the present invention as seen from below the suction body.

15 is a cross-sectional view taken along line EE of the suction body of FIG.

[Explanation of symbols]

101 ... Lower case, 102 ... Upper case, 103 ... Suction cover, 104 ... Rotating brush, 105 ... Impeller, 106 ...
Nozzle, 107 ... Recessed flow path, 108 ... Brush, 109 ... Keeper, 113 ... Brush chamber

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Susumu Sato 1-1-1, Higashi-Taga-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Electric Appliances Division (72) Masaro Sunagawa 1-chome, Higa-taga-cho, Hitachi-shi, Ibaraki No. 1-1 Hitachi, Ltd. Electric Appliances Division (56) References JP-A-60-12026 (JP, A) JP-A-9-38004 (JP, A) (58) Fields investigated (Int.Cl . ⁷ , DB name) A47L 9/04 A47L 9/02 A47L 9/06

Claims (8)

(57) [Claims] 1. An electric vacuum cleaner having a suction body for cleaning a surface to be cleaned by using suction airflow generated by an electric blower, wherein a front side of the suction body and a bottom opening of the suction body are provided on a bottom surface of the suction body. A plurality of concave flow paths for communicating with each other are provided, and a brush or a blade having flexibility is provided at a substantially center of the width of each of the concave flow paths. 2. An electric vacuum cleaner using a suction body for cleaning a surface to be cleaned by using a suction airflow generated by an electric blower, wherein a bumper on the front surface of the suction body is provided with a plurality of recesses. A plurality of concave flow paths for communicating the respective recesses and the mouthpiece bottom opening are provided on the bottom surface of the body, and a brush or a flexible blade is provided at the approximate center of the width of each of the concave flow paths. Vacuum cleaner to do. 3. The electric vacuum cleaner according to claim 1, wherein each of the concave flow paths is provided obliquely toward the opening on the bottom surface of the suction body. 4. The electric vacuum cleaner according to claim 1 or 2, wherein the width of each of the concave flow paths is 8 mm to 20 mm. 5. The vacuum cleaner according to claim 1 or 2, wherein the depth of each of the concave flow paths is 2 mm to 6 mm. 6. The vacuum cleaner according to claim 2, wherein the width of each recess of the bumper is larger than the width of each recessed flow path. 7. The device according to claim 1 or 2, further comprising means for detecting the surface to be cleaned and vertically moving the concave flow path including the brush or a blade having flexibility. Vacuum cleaner. 8. A suction body of an electric vacuum cleaner for cleaning a surface to be cleaned by using a suction airflow generated by an electric blower, comprising: a suction cover, a lower case, a front side of the suction cover, and a bottom opening of the lower case. A plurality of parts that make the suction airflow in contact with the front side of the suction port cover contacting a corner or a wall, as compared with the amount of the suction airflow when cleaning the flat surface to be cleaned. Of the concave flow paths, and a brush or a flexible blade that is provided approximately in the center of the width of each of the concave flow paths and that scrapes up dust on the surface to be cleaned, or a flexible blade. .