JPH06133900A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide the vacuum cleaner which can be run at the time of operation by the force very light in weight by floating up the cleaner main body by utilizing exhaust pressure from a motor-driven air blower. CONSTITUTION:In the vacuum cleaner in which a dust collecting chamber 3 and a motor-driven air blower 2, etc., are contained, an exhaust port 7 for exhausting exhaust air exhausted from the motor-driven air blower 2 onto the floor surface is provided in a bottom part 5 of the cleaner main body. Also, a first skirt 10 is provided so as to surround the exhaust port 7 provided in the bottom part 5 of the cleaner main body, rear wheels 8 for running and an auxiliary roller 9, a second skirt 11 is provided in the outside periphery of a first skirt 10, and in the bottom part 5 of the cleaner main body between a first skirt 10 and a second skirt 11, plural pieces of openings 12 for exhausting exhaust air to the outside of the cleaner main body 1 are provided, and an exhaust passage 1B for allowing the opening 12 and the outside of the cleaner main body 1 to communicate with each other is provided.

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 which floats the exhaust pressure from an electric blower using the exhaust pressure discharged from the bottom of an electric vacuum cleaner body.

[0002]

2. Description of the Related Art Conventionally, there has been an electric vacuum cleaner in which the vacuum cleaner body is floated by utilizing the exhaust pressure to improve the traveling property, but there are various problems. Actual public sho 55 shown in FIG. 17 and FIG.
No. 9866, and as another example, FIGS.
There is Japanese Patent Publication No. 55-11336. JP-B-55-9866 and JP-B-55-113.
It will be described individually based on Japanese Patent Publication No. 36-36.

Japanese Utility Model Publication No. 55-9866 (hereinafter simply referred to as "prior art 1") will be described with reference to FIGS. 17 and 18, in which an electric blower 70 connects a connection hose 71 and a paper bag 7.
The air sucked from the outside air after the passage of 2 and the like passes through the electric blower 70 and is exhausted to the exhaust port. In the case of the conventional floor moving type vacuum cleaner, the exhausted air is exhausted from the rear part of the cleaner main body 73 as it is, but in the case of the exhaust pressure floating type vacuum cleaner as shown in FIGS. 17 and 18, the exhausted air is From the discharge port 74 provided at the bottom of the cleaner main body 73, it is discharged toward the floor surface 78.

Then, the vacuum cleaner main body 73 is levitated from the floor surface 78 by the exhaust pressure of the discharged air to improve the traveling property.

The discharge port 74 is formed on the lower wall surface 73A of the bottom of the cleaner main body 73, and a brush holder 77 having a brush 76 implanted between the bottom plate 73B and the lower wall surface 73A.
Is mounted so that it slides up and down. The brush holder 77 is always pressed downward by the exhaust flow, and the brush 76 always keeps contact with the floor surface 78.

Further, a pressure chamber 100 is provided between the brush 76 planted on the brush holder 77 and the floor surface 78. By collecting air in the pressure chamber 100, the floating pressure is secured and the exhaust flow velocity to the outside air is slowed. The brush 76 itself naturally has air permeability.

Next, Japanese Patent Publication No. 55-11336 (hereinafter simply referred to as the prior art 2) will be described with reference to FIGS. 19 and 20. 80 is a body, 81 is a body, 82 is a body lid. The person constructs the vacuum cleaner body. The lower part 81 of the body has an upper part opened, and a partition plate is provided in the substantially central part thereof to divide it into a dust collecting chamber and an electric blower chamber. 86 is an electric blower, which is sandwiched between cushioning rubbers 87 and 88. Reference numeral 89 denotes a lower surface of the lower portion 81 of the body, which is a protrusion protruding in an annular shape behind a dust suction nozzle body (not shown).
Is an exhaust port that discharges toward the inner side 91 of the protrusion surrounded by the ring. The exhaust port 90 is always shielded by a valve 94 by its own weight or a spring.

Reference numeral 92 is a roller, and 92A is a roller shaft on which the roller 92 is rotatably attached. An exhaust port 93 is provided on the body, and a valve 94A is provided inside the exhaust port. Valve 94
The valve A is provided so that the exhaust port 93 is always shielded by its own weight or a spring, and when the valve 94 is blocking the exhaust port 90, the valve 94A releases the upper exhaust port 93. Reference numeral 95 denotes an interlocking rod provided between the roller shaft 93 and the valve 94 so as to be vertically movable. The valve 94, which has been pushed up by the movement of the roller shaft 92A and has closed the exhaust port 90, is pushed up to the exhaust hole 90. Is opened and the upper exhaust port 93 is closed.

Therefore, the air is exhausted from the exhaust port 90 so that the airframe can be floated by obtaining a constant pressure by the exhaust inside the protrusion 89.

[0010]

As described in the prior art 1, when it is provided at the bottom of the cleaner body 73, it is directly discharged from the discharge port 74 toward the floor surface. The pressure chamber 100 is formed between the floor surface and the annular brush 76, but since the brush itself has air permeability, the exhaust pressure escapes from this air permeable portion to the outside, and therefore the levitation force is lost. When it is used, when it is on a Joutan, etc., a part of the lower end surface of the brush 76 comes into contact with the floor surface, which adversely affects the operability, and the brush 76 is completely removed by the weight of the cleaner main body 73. It will come into contact with the floor surface and the operability will be significantly deteriorated due to frictional resistance.

Further, the noise from the electric blower 70 and the noise from the exhaust pressure are confused with each other, so that the leakage of the brush from the breathable portion makes the user noticeably uncomfortable.

Further, since the exhaust pressure is permeable to the brush 76 itself and escapes to the outside from this portion, the surrounding dust is scattered.

As described in the prior art 2, when the gas is exhausted from the exhaust port 90 and is provided in an annular shape, it is discharged inside the protrusion 89, that is, directly on the floor surface. At this time, the exhausted air has a structure in which the roller 92 and the auxiliary roller 95 are projected from the protruding portion 89 provided in an annular shape. Exhaust pressure is used to float the main body of the cleaner, and the main body is floated by blowing the exhaust pressure directly onto the floor surface. However, since the projection 89 does not directly contact the floor surface, Exhaust pressure escapes to the outside, scattering surrounding dust.

Further, since the exhaust pressure escapes from the gap to the outside, the pressure is remarkably lowered, which impairs the operability on the floor surface and on the Joutan.

Further, since the exhaust pressure leaks to the outside through the gap, the noise from the electric blower 86 and the noise of the exhaust pressure are confused with each other and leaked to the outside, which is extremely uncomfortable for the user.

In order to solve the problems of the prior art 1 and the prior art 2, if a soft material is provided in an annular shape in order to prevent the exhaust pressure from leaking to the outside, due to changes in pressure, movement of the main body, undulations, etc., The internal pressure decreases and the cleaner body sinks, the soft material provided in the ring is deformed and the internal pressure is released, the bottom of the cleaner body touches the floor surface, and the operating force only deteriorates. Instead, it scatters the surrounding dust.

Further, the noise of the electric blower and the noise of the exhaust pressure are confused with each other, and the noise leaks to the outside to give the user a significant discomfort. As described above, there have been problems with the method of sure prevention such as operability during use, floating property, dust scattering prevention, and noise prevention.

Further, since the dust scattering prevention mechanism cannot be attached and detached, there is a problem in cleaning and repairing.

[0019]

The main means for solving the present invention are as follows. As one of the means for solving, (1). An electric vacuum cleaner having a dust collecting chamber, an electric blower, etc. built-in, in which exhaust air from the electric blower is discharged from the bottom of the electric vacuum cleaner body and floated by exhaust pressure from the electric blower. In the machine, a first exhaust port is provided at the bottom of the vacuum cleaner body, and a first skirt is provided so as to surround the first exhaust port and the rear wheels and auxiliary rollers provided at the bottom of the vacuum cleaner body. A second skirt is provided on the outer circumference, and a plurality of second exhaust ports for discharging the exhaust gas to the outside of the cleaner body are provided at the bottom of the cleaner body between the first skirt and the second skirt, and the second exhaust port and the cleaning are performed. An exhaust passage communicating with the outside of the cleaner body is provided in the cleaner body.

As another means for solving the problem, (2). Sound absorbing means is provided inside the second skirt.

As another means for solving the problem, (3). A box body that covers the first exhaust port provided at the bottom of the electric vacuum cleaner body is provided at the bottom of the vacuum cleaner body, and a large number of openings are provided around the side surface of the box body and provided at the bottom of the box body and the vacuum cleaner body. A first skirt is provided so as to surround the rear wheel and the auxiliary roller, and a second skirt is provided on the outer periphery of the first skirt.
A plurality of second exhaust ports for discharging the exhaust gas to the outside of the cleaner body are provided at the bottom of the cleaner body between the skirt and the second skirt, and an exhaust passage communicating with the second exhaust port and the outside of the cleaner body is provided. It is provided on the vacuum cleaner body.

As another means for solving the problem, (4). The first skirt and the second skirt provided on the bottom of the cleaner body are detachable.

As another means for solving the problem, (5). At least one of the first skirt and the second skirt provided on the bottom of the cleaner body is made of a soft material.

As another means for solving the problem, (6). The second skirt provided on the bottom of the cleaner body is
It is longer than the first skirt, and the second skirt is always in contact with the floor surface even if the lower end of the first skirt is not in contact with the floor surface.

As another means for solving the problem, (7). At least one of the first skirt and the second skirt has a tubular shape made of a soft material, and the soft material is inserted into the tubular shape.

[0026]

[Action]

(1). By providing a second skirt on the outer side of the first skirt so as to surround the exhaust port provided at the bottom of the cleaner body and the wheels for traveling, the exhaust air passes through the outer skirt between the first skirt and the floor surface. Exhaust flow second
It becomes easy to capture by the skirt, contribute to the pressure rise in the first skirt, improve the floating force of the cleaner main body, and smoothly move to the left and right. Further, the exhaust air is formed between the first skirt and the second skirt, and the exhaust passage is formed above the exhaust hole so that the exhaust air is discharged upward to stabilize the pressure and the skirt is constantly sealed on the floor surface. The sealed condition will be maintained.

(2). If a sound absorbing means such as a felt is provided inside at least the first skirt of the first skirt and the second skirt, or in the exhaust passage through which the exhaust air passes, turbulent noise generated from the exhaust air is absorbed, so that a quiet operation is possible. Become.

(3). A box body that covers the first exhaust port provided at the bottom of the cleaner body is provided at the bottom of the cleaner, and a number of openings are provided around the side surface of the box, and the rear wheel is provided at the bottom of the box and the cleaner body. A first skirt is provided so as to surround the auxiliary roller, a second skirt is provided on the outer periphery of the first skirt, and exhaust air is provided outside the cleaner body at the bottom of the cleaner body between the first skirt and the second skirt. Since the second exhaust port for discharging is provided and the exhaust passage communicating between the second exhaust port and the outside of the cleaner body is provided, the levitation force is stabilized by a constant negative pressure.

(4). By attaching the first skirt and the second skirt to the bottom portion of the cleaner body with a detachable structure such as a hook-and-loop fastener, it is possible to extremely easily assemble the skirt and replace it when it is worn and damaged.

(5). By using a soft material for the first skirt and the second skirt, the state of hermetically sealing to the floor surface becomes more stable and contributes to the synergistic effect of the levitation force.

(6). The second provided on the bottom of the vacuum cleaner body
Since the skirt is longer than the first skirt and the second skirt is always in contact with the floor surface, the exhaust air discharged from the cleaner body does not leak from the second skirt, so the cleaner body floats stably. To do.

(7). Since the first skirt has a triple structure with excellent flexibility, even if the pressure in the first skirt is lowered due to some influence, the skirt is not deformed or bent, and the pressure can be kept uniform. .

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the illustrated embodiment. In addition, the same components will be described with the same reference numerals. First, referring to one embodiment of FIG. 1, FIG. 2 and FIG. 3, reference numeral 1 is a main body of an electric vacuum cleaner, in which an electric blower 2 and a dust collecting chamber 3 are built in at predetermined positions. A suction hose 4 is detachably attached at a proper position in front of the dust collection chamber 3. A paper bag 3A for collecting dust is installed in the dust collection chamber 3.

For cleaning, when the power switch (not shown) is turned on, the electric blower 2 is driven, air is sucked from the suction hose 4, passes through the paper bag 3A in the dust collecting chamber 3, and is discharged from the electric blower 2. Is blown from the electric blower 2, and the exhaust air is discharged from the bottom portion 5 of the cleaner body.
It is configured to be discharged only to the first exhaust port 7 provided in the.

Therefore, the exhaust air is guided from the electric blower 2 to the first exhaust port 7 as shown by the arrow. 6 is a discharge port provided at the rear of the cleaner body 1 as in the conventional case.
Two rear wheels 8 and one auxiliary roller 9 which can be steered forward are provided on the rear side of the vacuum cleaner body bottom part 5 to facilitate traveling when the cleaner is used. The first exhaust port 7, the rear wheel and the auxiliary roller 9 are surrounded by the first
The skirt 10 is provided, and the second skirt 11 is provided on the outer periphery of the first skirt 10.

The first skirt 10 and the second skirt 11 are made of a soft material. Therefore, it is possible to flexibly adapt to unevenness of the floor surface, sill, etc., and it is extremely effective for scattering dust.

Exhaust air from the first exhaust port 7 is discharged to the floor surface, the flow is blocked by the first skirt 10 and pressure is generated, and the cleaner main body 1 is lifted,
It flows out between the skirt 10 and the floor surface. The second skirt 11 has a lower L than the first skirt 10
Since it is provided only for one time, the outflowing air is prevented from flowing out of the second skirt 11, and is provided between the first skirt 10 and the second skirt 11, that is, on the bottom 5 of the cleaner body as shown in FIG. Forming a plurality of second exhaust ports 12 and
It is guided to the upper part from the exhaust hole 12, passes through the exhaust passage 1B provided in the cleaner body 1, and is exhausted to the atmosphere from the exhaust port 6.

The levitation force of the cleaner body 1 is obtained by the first skirt 10, and the second skirt 11 is always in contact with the floor surface as shown in the figure, so that a constant pressure is maintained. become. Further, the first skirt 10 described above
The air blown between the floor and the floor enters the exhaust passage 1B inside the cleaner body 1 again without scattering the surrounding dust.

A plurality of the second skirts 11 may be provided. In this case, since the second skirts 11 are formed so as to surround the outer circumference thereof, it is necessary to form the second exhaust port 12 between the respective skirts.

If the height of the rear wheel 8 and the auxiliary roller 9 is set higher than that of the first skirt 10 as indicated by L2 in FIG. 1 in order to stabilize the running performance, the levitation force becomes weaker for some reason. Since the first skirt and the second skirt 11 are bent and the wheels come into contact with the floor surface and run on the wheels, the running performance is improved.

4 and 5, one embodiment of the present invention will be described with reference to FIG. 4, which is a vertical sectional view, and FIG. 5 is a sectional view taken along line AA of FIG. The description of the same parts as those in FIGS. 1, 2, and 3 will be omitted.

The air discharged from the electric blower 2 provided inside the cleaner body 1 is provided with a first exhaust port 7 at a predetermined position on the bottom portion 5 of the cleaner body. This first exhaust port 7
A box body 5A for covering the above is provided so as to form 13 on the bottom portion 5 of the cleaner body. A sound absorbing material 14 such as a felt is attached to the inner surface of the box body 5A to absorb exhaust flow noise and noise of the electric blower 2.

As shown in the drawing, a large number of lattice-shaped or nozzle-shaped openings 15 are formed on the side surface around the space 13 in the box 5A over the entire circumference. The first skirt 10 is arranged in the vicinity of the box 5A. The second skirt 11 is arranged outside the first skirt 10 so as to surround the second skirt 11. A sound absorbing material 14A such as felt is attached to the inside of the first skirt 10 and the second skirt 11.

The air discharged from the electric blower 2 is
First exhaust port 7 provided at a predetermined position on the bottom part 5 of the cleaner body
Flow into the space 13 of the box body 5A, and the air entering the space 13 is ejected from a large number of openings 15 and hits the inner upper part of the first skirt 10.

The air hitting the inner upper part of the first skirt 10 is bent inward along a substantially V-shape and flows between the bottom part 5 of the cleaner body and the floor surface. Since there is no outlet for the inflowing air, the pressure rises and the cleaner body 1 is levitated. Then, it flows toward the outside through the lower surface of the first skirt 10. This air collides with the air bent inward by the first skirt 10 and its flow is obstructed, so that the pressure is further increased and the cleaner body 1 is levitated more strongly. Here, the sound absorbing material 14A is attached to the first skirt 10 and absorbs the turbulent noise emitted from the opening 15 and hitting the first skirt 10.

Next, a flat surface portion 10A is provided at the lower end of the first skirt 10, and the air flowing between the lower surface of the first skirt 10 and the floor surface is different from that in the case where it is in a dogleg shape. Since it flows through the narrow flow path for a long time, the flow path resistance increases and the internal pressure is further increased to lift the cleaner main body 1 and to act in the direction of widening the flow path. Further, an air film is generated on the entire flat surface portion 10A of the first skirt 10, so that extremely stable levitation performance can be obtained.

The air that has passed through the lower surface 10A of the first skirt 10 is blocked by the second skirt 11 which is longer than the first skirt 10, and passes through the exhaust passage 1B from the second exhaust port 12 and the cleaner body. 1 is introduced into the atmosphere through an exhaust port 6 provided at a predetermined position behind.

A sound absorbing material 14A such as felt is attached to the inner surface of the second skirt 11 and the first skirt 1
The sound of the high-speed airflow that has passed through 0 will be absorbed.
To absorb sound, first, the sound absorbing material 1 attached to the inside of the box body 5A.
The sound absorbing means having three steps is provided, in which the sound in the space 13 is absorbed by 4 and then the sound generated between the floor surface and the sound absorbing material 14A attached to the inside of the first skirt 10 is also absorbed. ing.

In the embodiment, an example in which it is provided at three places as described above has been described, but the present invention is not limited to this, and it is not hindering to provide sound absorbing means as much as possible at a place where sound is emitted.

As means for absorbing noise, although not shown, only the amount of change in the sound wave period is obtained from the sound wave to be silenced extracted from the noise, and the circumferential wavelength of the sound wave to be silenced is detected. Corresponding to the detected circumferential wavelength, sine wave data and cosine wave sine wave data in which waveform data is stored in advance are output to the adaptive digital filter. Since the adaptive digital filter generates a waveform having a phase opposite to that of the sound wave to be muted based on the input data, the active sound wave to be converted into an analog signal is sent from the sound wave output means to interfere with the sound wave to be muted. Therefore, instead of attaching the absorber, the noise can be eliminated by the electric noise reduction means, which is highly practical.

Further, as one embodiment for facilitating the traveling of the cleaner main body 1, there are, for example, FIGS. 6, 7, 8, and 9, and this configuration will be described in detail together with its movement. In FIGS. 6 and 7, exhaust air discharged from the electric blower 2 always passes through the exhaust passage 7A according to the arrow and is blown into the first skirt 10 formed of a soft elastic body. Then, the exhaust air is discharged from the exhaust passage 7A through the first exhaust port 7 toward the floor inside the first skirt 10.

When not in use or when the amount of exhaust air is relatively small, the first skirt 10 is in a normal state as shown in FIG. 7, that is, since there is no exhaust air inside, the first skirt 10 rises upward as shown in FIG. Since the space between the first skirts 10 is wide open, the first skirt 10 and the second skirt 11 do not touch the floor surface, and the rear wheel 8 and the auxiliary roller 9 (not shown) come into contact with the floor surface to run the wheels. .

As the exhaust air flow rate increases, as shown in FIG. 7, the first skirt 10 swells and projects below the wheel, so that the wheel floats and the air flowing between the first skirt 10 and the floor surface causes the floor surface to rise. The cleaner body 1 is further separated and is in a floating state.

Next, referring to the cross-sectional view of FIG. 8,
Exhaust air from the electric blower 2 flows from the first exhaust port 7 between the first skirt 10 and the floor surface, enters the inside of the first skirt 10 and is formed in an exhaust passage formed in the bottom portion 5 of the cleaner body. It is configured to inflate the second skirt 11 through the second exhaust port 12. At this time, the second skirt 11
Extends outward from the cleaner body 1 and plays the same role as a bumper. Of course, it goes without saying that the first skirt 10 and the second skirt 11 are made of a soft elastic body.

A predetermined portion in the exhaust passage formed in the cleaner body 1 and the bottom portion 5 of the cleaner body for forcibly flowing the exhaust air through the second exhaust port 12 in the exhaust passage and into the second skirt 11. It is advisable to form a partition plate at a position so that the exhaust gas entering the second skirt 11 and the exhaust gas from the second skirt 11 to the exhaust passage can be easily carried out. Therefore, the second skirt 11
When cleaning with the bulge inflated, the cleaner body 1 floats due to the exhaust pressure, and because it travels extremely lightly and smoothly, even if it skids and hits furniture or the like, the bulge of the second skirt 11 damages the furniture or the like. There is no such thing.

When it is not possible to provide a bumper function for inflating the inside of the second skirt 11, as shown in FIG. 9, the bumper portion 1 is provided above the second skirt 11 of the cleaner body 1.
It is also possible to provide C and take a large portion of the negative pressure portion of the exhaust gas. Before entering the final exhaust passage 1B, the above bumper part 1
C will be inflated and the bumper function will be further improved. It is more preferable that the bumper portion 1C is made of a soft elastic material.

Next, the structure and shape of the first skirt 10 and the second skirt 11 will be described. First, Fig. 1
0 and FIG. 11 will be described in detail. Since the overall configuration of the electric vacuum cleaner of the present invention has been described above, a detailed description of its configuration will be omitted. FIG. 10 is a schematic cross-sectional view of the entire configuration, and FIGS. 11A, 11B, 11C, and 11D are cross-sectional views of main parts of FIG.

The cleaner body 1 houses the electric blower 2, the paper bag 3A, etc., and the bottom portion 5 of the cleaner body is provided with rear wheels 8 and auxiliary rollers 9 at predetermined positions. A first skirt 10 is formed so as to surround the rear wheel 8, the auxiliary roller 9 and the first exhaust port 7 formed at a predetermined position on the bottom portion 5 of the cleaner body, and a second skirt 11 is formed on the outer periphery thereof.

As shown in the figure, the rear wheel 8 and the auxiliary roller 9 are attached to the floor surface of the first skirt 10 so that the rear wheel 8 and the auxiliary roller 9 are shorter than the bottom surface of the first skirt 10 while being housed in the cleaner body 1 with respect to the floor surface. The air sucked from the outside by the electric blower 2 via the suction hose 4 and the paper bag 3A is discharged toward the floor from the first exhaust port 7 provided at a predetermined position on the bottom portion 5 of the cleaner body.

The first skirt 10 has the first exhaust port 7
Is provided so as to surround the ring, and is of course formed of a soft material. On the lower end surface of the first skirt 10, a resin molded product 10a having a very good sliding property is provided, and is formed in the same annular shape as the first skirt 10 and integrally.
The second skirt 11 is made of a soft material, and is provided so as to surround the outer circumference of the first skirt 10 in an annular shape.
The dimension is long in the floor direction.

The flow of the exhaust gas discharged from the first exhaust port 7 is obstructed by the first skirt 10 and a pressure is generated in the first skirt 10, so that the cleaner body 1 is levitated and the floor surface and the first skirt 10 are separated from each other. It flows out from between. The discharged exhaust gas is blocked by the second skirt 11 and guided to the upper portion through the second exhaust port 12, and is exhausted from the exhaust port 6 to the atmosphere via the exhaust passage 1B in the cleaner body.

As for the operability, the levitation force is sufficiently obtained in the use state to exhibit good operability, and the operation force deteriorates under the first skirt 10 even in the non-use state or the skirt frictional resistance on the jutan. By providing the resin molded product 10a having good sliding property on the end face, the frictional resistance of the skirt itself is extremely small and the operability can be further improved by the operation of the rear wheel 8 and the auxiliary roller 9.

The tip of the first skirt 10 shown in FIG.
As shown in (a), the sled portion 10b having a U-shaped cross section is annularly attached. While maintaining the same annular shape in the resin molded product 10a provided at the lower end of the first skirt 10 shown in FIG.
By providing the sled portion 10b having the taper portion in the outward direction as shown in (b), it is possible to smoothly move along with the wheel operation without getting caught when overcoming an obstacle, a threshold, or the like.

Further, as shown in FIG. 11 (c), when the roller 10c is formed on a part of the sled portion 10b having the taper portion in the outward direction while maintaining the same annular shape, the roller 10c is caught when an obstacle, a sill or the like is overcome. It will be possible to move more smoothly without any trouble. Further, as shown in FIG. 11 (d), another sled portions 10b1 and 11b1 having the same annular shape are provided inward of the resin molded products 10a and 11a, so that obstacles, sills, etc. can be moved in either left or right direction. When moving over, you can move more smoothly without getting caught.

The above-mentioned first skirt 10 and second skirt 1
1 is attached to the attachment portion of the vacuum cleaner body bottom portion 5.
If a recess (not shown) is provided in the vicinity of the bottom surface of the vacuum cleaner main body 5 that serves as the mounting portion, the first skirt 10 and the second skirt 11 are moved upward when overcoming obstacles, sills, etc. on the floor surface. Lifted and fit into the recess,
Since it is integrated with the bottom part 5 of the cleaner body, wear of the tip part of the skirt is reduced.

Next, regarding the shape configuration of the first skirt 10 and the second skirt 11, FIG. 12, FIG. 13 (a) and (b)
A description will be given according to (c). The cleaner body 1 accommodates the electric blower 2, the paper bag 3A, etc., and the cleaner body bottom 5 is provided with rear wheels 8 and auxiliary rollers 9 at predetermined positions. Further, the rear wheel 8, the auxiliary roller 9 and the bottom portion 5 of the cleaner main body
The first skirt 10 is formed so as to surround the first exhaust port 7 formed at the predetermined position, and the second skirt 11 is formed on the outer side thereof.

Air sucked from the outside by the electric blower 2 via the suction hose 4 and the paper bag 3A is discharged from the first exhaust port 7 toward the floor surface. First skirt 1 above
0 is provided so as to surround the first exhaust port 7 in a ring shape. As shown in FIG. 13A, the first skirt 10 has a three-layer structure in which the inner and outer peripheries are sandwiched by soft materials 18 while the urethane foam 17 shape is maintained in the middle and has excellent flexibility. The length in the vertical direction is shortened toward the inner circumference, and the end faces having different lengths in the vertical direction are curved inward so as to form an arc shape to form an integral shape.

The exhaust gas discharged from the first exhaust port 7 is
The flow is obstructed by the first skirt 10, pressure is generated in the first skirt 10, the sweeping and removing machine body 1 is lifted, and flows out from between the first skirt 10 and the floor surface. The outflowing air is provided so that the second skirt 11 is longer than the first skirt 10 by L1 as shown in the figure. Therefore, it is blocked by the second skirt 11 and guided to the upper part through the second exhaust port 12, passes through the exhaust passage 1B in the cleaner body, and is discharged from the discharge port 6 into the atmosphere.

The levitation force is obtained by the inside of the first skirt 10 and the inside of the second skirt 11, the exhaust hole 12, the exhaust passage 1B, and the exhaust port 6 are scattered without scattering dust around the cleaner body 1. Exhausted into the atmosphere via. Also,
Since the first skirt 10 has a three-layer structure with excellent flexibility while maintaining the shape in the middle, the first skirt 1
Even if the pressure of 0 is lowered due to some influence, the first skirt 1 is crushed inward by the load of the cleaner body as shown in FIG.
A uniform pressure can be maintained without letting the pressure within 0 escape.

The first skirt 10 is shown in FIG.
As shown in (c), it is possible to secure the same performance as that of the first skirt 10 formed in the arc shape by adopting the substantially V shape and the three-layer structure.

Further, both the first skirt 10 and the second skirt 11 have the same three-layer structure and the same cross-sectional shape as the first skirt 10, so that the shape can be maintained in the middle as compared with the skirt using the soft material. Since it uses a material with excellent flexibility, regardless of the shape of the floor surface, there is no deformation or deflection even when there is a sudden change in pressure, and exhaust gas does not flow out to the outside to ensure a constant pressure and to scatter dust. Things will disappear.

Next, regarding the shape of the skirt and the mounting means, FIGS. 14, 15 (a), (b), (c), and FIG.
A description will be given according to (a) and (b). First, referring to FIG. 14, the cleaner body 1 includes an electric blower 2 and a paper bag 3A.
The rear wheel 8 and the auxiliary roller 9 are provided at predetermined positions on the bottom 5 of the cleaner body. A rear skirt 10 is formed on the outer side of the first skirt 10 so as to surround the wheel 8, the auxiliary roller 9, and the first exhaust port 7 formed at a predetermined position on the bottom portion 5 of the cleaner body.

The rear wheel 8 and the auxiliary roller 9 are shorter than the first skirt 10 in the state of being housed in the cleaner body by L2 as shown in the figure.
Needless to say, the second skirt 11 is formed longer than the floor surface by L1 than the first skirt 10.

Electric blower 2 housed in the cleaner body 1
The air sucked from the outside through the suction hose 4 and the paper bag 3A is passed only through the first exhaust port 7 formed in the bottom portion 5 of the cleaner body and is discharged toward the floor. The first skirt 10 is provided so as to surround the first exhaust port 7 in an annular shape, and is made of a soft material.

On the lower end surface of the first skirt 10, a resin molded product 10a having a good sliding property is attached. Needless to say, the resin molded product 10a is formed in the same annular shape as the first skirt 10 and is integrally formed. Second above
The skirt 11 is also made of a soft material like the first skirt 10, and is attached in an annular shape so as to surround the first skirt 10.

The second skirt 11 is the first skirt 10.
As shown in the figure, it is provided long in the floor surface direction by L1.
Exhaust gas discharged from the first exhaust port 7 is blocked by the first skirt 10 and pressure is generated in the first skirt 10 to lift the cleaner body 1 and flow out from between the first skirt 10 and the floor surface.

The discharged exhaust gas is blocked by the second skirt 11 and passes through the exhaust passages 1B above the second exhaust ports 12 formed in the vicinity of the bottom portion 5 of the cleaner main body 5 in the rear portion of the cleaner main body 1. The gas is exhausted into the atmosphere from the exhaust port 6 provided in the. Regarding the operability, a resin molded product 10a is provided on the lower end surface of the first skirt 10 which has a sufficient levitation force when used and exhibits good operability. The deterioration is also eliminated and the frictional resistance of the skirt itself is extremely reduced.

The above-mentioned first skirt 10 and second skirt 1
15 (a), (b) and (c) for the mounting structure of FIG.
The rib 5 for attaching the first skirt 10 and the second skirt 11 to the bottom part 5 of the cleaner body will be described with reference to FIG.
A and 5b are formed in an annular shape at predetermined positions to attach the skirt. On the inner surfaces of the ribs 5a and 5b, generally-used commercially available magic tape (hereinafter simply referred to as a surface fastener) is attached. The rib 5a,
One side of the hook-and-loop fastener on the skirt attachment part of 5b,
20 are attached, and the surface fasteners 21 and 21 are attached to the ribs 5a of the first skirt 10 and the ribs 5b of the second skirt 11, respectively.

Therefore, the first skirt 10 and the second skirt 11 are attached by the ribs 5a, 5b of the bottom portion 5 of the cleaner body.
Surface fasteners 20, 20, first skirt 10 and second
By joining the surface fasteners 21 and 21 of the skirt 11, not only the attachment is easy, but also the skirt can be easily detached when the skirt is replaced.

Needless to say, this detachable structure has a corresponding adhesive force so as not to come off easily when the cleaner is used.

The above-mentioned first skirt 10 and second skirt 11
Sled parts 10a, 11 of resin molded product attached to the lower end surface of the
The surface fasteners 22, 22 on the skirt side and the surface fastener 2 on the sides of the sled portions 10a, 11a are also connected to the joint portions of "a".
By providing 3, 23, a detachable structure can be obtained.

The sled portion 10a on the side of the first skirt 10 is shaped in the outward direction and the sled portion 11a on the side of the second skirt 11 is shaped in the inward direction, so that the exhaust air flows smoothly.
Moreover, it is configured so as not to leak outside.

A T-shaped scattering prevention rubber lip 24 as shown in FIG. 15B is provided to prevent exhaust air from leaking outside from the tip portion of the sled portion 11a of the second skirt 11 and scattering of dust. A groove 11b for attaching the scattering prevention rubber clip 24 is formed at the tip of the sled portion 11a. The groove 11b is required to have a quadrangular cross section so that the groove 11b does not easily come off when set easily when inserted.

Reference numeral 15 (c) is another embodiment of the scattering preventing rubber clip 24. The rubber clip 25 has a plurality of protrusions 25a, and the protrusions 25a are formed on the sled portion 11a.
It is attached by inserting it into the hole 11c provided in the. If the tip of the protrusion 25a has a conical shape as shown in the figure, it is considered appropriate as an attachment means because it is easy to insert when inserted and does not easily come off when set.

The attachment means is not limited to this, and all possible configurations are conceivable. For example, it is conceivable that the protrusions are reversed.

Further, by attaching the scattering preventing rubber lips 24, 25 to the sled portion 11a of the second skirt 11, it is possible to improve the sealing property with the floor surface.

A sled portion 11a is attached to the tip of the second skirt 11 as shown in FIGS. 16 (a) and 16 (b).
A rubber lip 26 is attached to the tip of the sled portion 11a. When attaching the sled portion 11a to the second skirt 11, a spring 27 is provided between the attachment portion of the second skirt 11 of the vacuum cleaner body bottom portion 5 and the sled portion 11a as shown in FIG. 16 (a). The spring 27 has the sled portion 11a.
Can be constantly pressed against the floor surface regardless of the exhaust pressure, floor surface, etc., thus maintaining the sealing property. Further, the spring 27 is not limited in type and shape as long as it can press the sled portion 11a against the floor surface.

As shown in FIG. 16 (b), the rubber lip 26 may be changed into a bellows shape to form a chevron-shaped rubber clip 28. That is, by providing the chevron-shaped rubber lip 28 at the tip of the sled 11a, the sealability with the floor surface is maintained, and if it is the cheve-shaped rubber slip, smooth sliding is possible and the transportability is further stabilized.

Although the present invention has been described based on the above embodiments, the present invention is not limited to these structures.

[0090]

As is apparent from the above description, according to the first aspect, the problem that the dust on the floor is scattered by the exhaust air is solved by the first skirt and the second skirt.
The levitation force can be further stabilized by the first skirt and the second skirt. Therefore, the transportation during the operation is light and the movement is easy. Further, by forming a second exhaust port between the first skirt and the second skirt and guiding it to the exhaust passage above it, when the exhaust air in the inner skirt rises, excess exhaust air is exhausted from this exhaust hole. The exhaust pressure required for the levitation force is more stable because it is guided to the exhaust passage, and the traveling performance is also stabilized. Furthermore, the skirt can always be hermetically sealed to the floor surface to maintain a sealed state. This prevents dust from scattering.

According to the second aspect, the turbulent noise generated by the exhaust air is absorbed by the absorber, so that the unpleasantness at the time of operation is eliminated. As a synergistic effect, it not only reduces the noise of the electric blower at the same time, but also improves the levitation force and running performance.

According to the third aspect, exhaust air is ejected from a large number of openings, so that the exhaust pressure is kept constant and the levitation force is stable. From the second exhaust port formed between the first skirt and the second skirt. Since it is guided to the exhaust passage, the skirt and the floor surface are kept in a sealed state, the floating force is further stabilized, and the light running performance and operability are improved. To keep the seal, prevent noise and scattering of dust.

According to claim 4, the first skirt and the second skirt
It is extremely easy to replace the skirt when it is assembled and when it is worn or damaged.

According to the fifth aspect, since the skirt is made of a soft material, the airtight state on the floor surface not only provides a more stable levitation force, but also prevents noise. Therefore, the traveling performance becomes easy. In addition, it can flexibly adapt to uneven floors and sills, and is extremely effective in scattering dust.

According to the sixth aspect, the exhaust air always passes through the lower surface of the first skirt and guides to the second skirt except the air necessary for exhaust pressure, thus stabilizing the levitation force. Further, it prevents the outflow from the second skirt to the outside. Therefore, the traveling property during operation becomes extremely easy. According to claim 7, irrespective of the shape of the floor surface and deuterium, the exhaust pressure does not flow out to the outside without being deformed or deflected due to a sudden pressure change, and the exhaust pressure of the exhaust air at a constant pressure is always maintained to scatter dust. There is nothing to do. Driving performance is also extremely easy.

[Brief description of drawings]

FIG. 1 is a sectional view of the overall configuration showing a first embodiment of the present invention.

FIG. 2 is a bottom view of the embodiment shown in FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view of the overall configuration showing a second embodiment of the present invention.

5 is a sectional view taken along line BB of FIG.

FIG. 6 is a cross-sectional view taken along the line BB of FIG. 4, showing a third modified example, with the first skirt retracted and the wheels installed.

FIG. 7 is a cross-sectional view taken along the line BB of FIG. 4, showing a third modified example, with the first skirt inflated and floated.

FIG. 8 shows a fourth modified embodiment, which is taken along the line BB of FIG.
FIG.

FIG. 9 shows a fourth modified embodiment, and is taken along line BB of FIG.
FIG.

FIG. 10 is a sectional view of the overall configuration showing a fifth embodiment.

11A, FIG. 11B, FIG. 11C, and FIG.
FIG. 6 is a cross-sectional view taken along the arrow A of FIG.

FIG. 12 is a sectional view of the overall configuration showing a sixth embodiment.

FIG. 13 is a sectional view showing the main part of the first skirt of FIG.
(A) is a figure which shows a curved state, (b) is a figure which shows the collapsed state when exhaust pressure falls, (c) is a figure which shows a substantially V shape.

FIG. 14 is a sectional view showing the overall structure of a seventh embodiment.

15 is an enlarged cross-sectional view of a main part of a B section in FIG.
(A) shows the Example which shows the attachment state of a 1st skirt and an outer side skirt part, (b) shows one Example which shows the attachment state of a 2nd skirt part, (c) shows the attachment of a 2nd skirt part It is another example of a state.

16 is an enlarged cross-sectional view of the main part of the second skirt portion of FIG. 14, (a) showing the state of the tip of the second skirt, and (b) showing the state of the tip of the second skirt. It is another embodiment.

FIG. 17 is a cross-sectional view showing a state of a conventional exhaust pressure levitation electric vacuum cleaner when not in use.

FIG. 18 is a cross-sectional view showing a usage state of a conventional exhaust pressure floating type electric vacuum cleaner.

FIG. 19 is a cross-sectional view showing another conventional exhaust pressure floating type vacuum cleaner in a non-use state.

FIG. 20 is a cross-sectional view showing a use state of a conventional exhaust pressure floating type vacuum cleaner.

[Explanation of symbols]

 1 Vacuum Cleaner Main Body 1B Exhaust Passage 2 Electric Blower 3 Dust Collection Room 3A Paper Bag 4 Suction Hose 5 Vacuum Cleaner Main Body Bottom 5A Boxes 5a, 5b Rib 6 Discharge Port 7 1st Exhaust Port 8 Rear Wheel 9 Auxiliary Roller 10 1st Skirt 10a Sled portion 11 Second skirt 11a Sled portion 12 Second exhaust port 13 Space 14,14A Sound absorbing material 15 Opening 17 Foam urethane 18 Soft material 20,21,22,23 Surface fastener 27 Spring

Claims (7)

[Claims] 1. An electric vacuum cleaner having a dust collecting chamber, an electric blower and the like built-in, wherein exhaust air from the electric blower is discharged from a bottom portion of the electric vacuum cleaner body and floated by exhaust pressure from the electric blower. In the electric vacuum cleaner as described above, a first exhaust port is provided at the bottom of the vacuum cleaner main body, and a first skirt is provided so as to surround the first exhaust port and the rear wheels and auxiliary rollers provided at the bottom of the vacuum cleaner main body. A second skirt is provided on the outer periphery of the first skirt, and a plurality of second exhaust ports for discharging the exhaust gas to the outside of the cleaner body are provided at the bottom of the cleaner body between the first skirt and the second skirt. 2. An electric vacuum cleaner, characterized in that an exhaust passage communicating with the exhaust port and the outside of the cleaner body is provided in the cleaner body. 2. The electric vacuum cleaner according to claim 1, wherein a sound absorbing means is provided inside the second skirt. 3. An electric vacuum cleaner having a dust collecting chamber, an electric blower and the like built-in, wherein exhaust air from the electric blower is discharged from a bottom portion of the electric vacuum cleaner body and floated by exhaust pressure from the electric blower. In the electric vacuum cleaner, the box body covering the first exhaust port provided at the bottom of the electric vacuum cleaner body is provided at the bottom of the vacuum cleaner body, and a large number of openings are provided around the side surface of the box body. And a first skirt that surrounds the rear wheels and auxiliary rollers provided on the bottom of the cleaner body, and a second skirt on the outer periphery of the first skirt, and the bottom of the cleaner body between the first skirt and the second skirt. A plurality of the second exhaust ports for exhausting exhaust air to the outside of the cleaner body are provided, and an exhaust passage communicating with the second exhaust ports and the outside of the cleaner body is provided in the cleaner body. . 4. The electric vacuum cleaner according to claim 1, wherein the first skirt and the second skirt provided on the bottom of the cleaner body are detachable. 5. The electric vacuum cleaner according to claim 1, wherein at least one of the first skirt and the second skirt provided on the bottom of the cleaner body is made of a soft material. 6. The second skirt provided at the bottom of the cleaner body is longer than the first skirt, and the second skirt always contacts the floor surface even if the lower end of the first skirt does not contact the floor surface. The vacuum cleaner according to any one of claims 1 to 5, characterized in that 7. The method according to claim 1, wherein at least one of the first skirt and the second skirt has a tubular shape made of a soft material, and a soft material is inserted into the tube. Vacuum cleaner.