JP3858217B2 - Vacuum cleaner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vacuum cleaner using a rotating brush.
[0002]
[Prior art]
FIG. 20 is a plan view showing a conventional vacuum cleaner disclosed in, for example, Japanese Utility Model Laid-Open No. 57-181249, and FIG. 21 is a cross-sectional view showing the suction port chamber. The conventional vacuum cleaner is provided with a suction port chamber 42 at the front lower surface of the vacuum cleaner body 1, and a suction passage 43 for guiding a suction air flow from the blower is a part of the rear wall surface of the suction port chamber 42 at the rear portion. It is communicated to. A rotary brush 44 is attached to the suction port chamber 42, and the rotation of the electric motor 46 is transmitted to the rotary brush 44 by connecting means 45 such as a belt. The rotating brush 44 has a brush for spiraling up the dust on the carpet. Further, an auxiliary rotating brush 47 is provided in front of the rotating brush 44, and a brush for scraping up dust is also implanted in the auxiliary rotating brush 47 in a spiral shape. The auxiliary rotating brush 47 is rotatably supported inside the front wall 48 of the cleaner body 1. The brush tips of the auxiliary rotating brush 47 and the rotating brush 44 are disposed so as to overlap each other by about 1 mm to 5 mm. With this configuration, when the rotating brush 44 is rotated by the electric motor 46, the auxiliary rotating brush 47 is rotated in conjunction with the rotating brush 44, so that it is possible to prevent unsucked material near the wall.
[0003]
[Problems to be solved by the invention]
However, in the conventional vacuum cleaner, when the rotating brush 44 rotates in the forward direction, the auxiliary rotating brush 47 rotates in the reverse direction, and dust may be pushed out. Further, when the rotating brush 44 rotates backward, there is a problem in that the dust in the G portion shown in FIG. 21 cannot be scraped out and the dust remains. Further, when the rotating brush 44 rotates backward, dust is caught in the contact portion of the auxiliary rotating brush 47 with the brush, so that the width of the rotating brush 44 and the auxiliary rotating brush 47 is large. There is a problem that dust is caught and the vicinity of the inlet of the suction passage 43 is clogged. Further, since the brushes of the two brushes are always in contact with each other, the resistance to the rotating brush 44 is transmitted, and the resistance is transmitted to the electric motor 46 through the connection means 45, so that the temperature of the electric motor 46 may rise. There was a problem that there was.
[0004]
The present invention has been made to solve the above-described problems, and the rear brush is rotated in the direction opposite to the traveling direction of the cleaner body, and is scraped up from above the contact portion between the rear brush and the front brush. An object of the present invention is to provide a vacuum cleaner with good dust absorption performance by sucking dust.
[Means for Solving the Problems]
An electric vacuum cleaner according to the present invention includes a front brush provided in front of a vacuum cleaner main body, a rear brush provided in contact with the front brush behind the front brush, and the front brush and the rear brush. A suction port provided above the contact portion so as to face the contact portion, the rear brush rotates in a direction opposite to a traveling direction of the cleaner body, and the front brush rotates the rear brush. The front brush rotates in the direction opposite to the rear brush, and the front peripheral portion of the front brush is part of the suction port at the front end of the cleaner body with respect to the traveling direction of the cleaner body. It is installed so as to protrude forward from the inside of the wall to be formed, and an air passage forming member is provided above the suction port, and the air passage forming member has an opening having a smaller opening area than the suction port at the rear of the cleaner body. Communicates with the dust collection chamber The air passage forming member has an inclined portion on the ceiling of the air passage forming member so that the area of the passage increases as it approaches the opening, and the opening out of the dust scraped upward by the front brush and the rear brush. Dust ejected from the front of the front is sucked through the opening and taken into the dust collection chamber, dust that cannot be flipped up to the front of the opening is applied to the inclined portion and changed to the opening side, and dropped, and the front brush and The operation of flipping up again by the rear brush is repeated until dust reaches the opening .
[0006]
Moreover, the said suction inlet is opened with the substantially same width | variety with respect to the width | variety of the longitudinal direction of the said contact part of the said front brush and the said back brush.
[0007]
Further, the front brush is provided with a soft brush such as a raised brush for wiping the floor surface, and the rear brush is provided with a brush harder than the front brush for scraping dust from the carpet.
[0008]
In addition, the front brush is rotatably supported, and a support member is provided to support the vacuum cleaner main body so that the front brush can move up and down. The support member has the front brush upward with respect to the vacuum cleaner main body. the non-contact the rear brush and the front brush by moving, but to switch to contact the rear brush and the front brush by moving down against the cleaner body to the front brush.
[0009]
Further, the rear brush is driven by a rotary driving body.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
1 to 4 show a first embodiment of the present invention, FIG. 1 is a perspective view showing the entire vacuum cleaner, FIG. 2 is a cross-sectional view showing the main body of the vacuum cleaner, and FIG. 3 is an internal view of the main body of the vacuum cleaner. Sectional drawing which shows a structure, FIG. 4 is sectional drawing of the vacuum cleaner main body which shows the state which is attracting | sucking dust.
[0011]
In the figure, reference numeral 1 denotes a main body of a vacuum cleaner, and an upper case 2 and a lower case 3 constitute an external appearance. The front end 1a of the main body 1 has a two-wall structure. Reference numeral 4 denotes an elongated pipe made of metal or resin connected to the rear of the main body 1, and 5 denotes a connecting portion provided on the main body 1, which rotates up and down or left and right with respect to the main body 1. ing. A handle 6 is provided at the other end of the pipe 4. 7 is a wheel for running the main body 1, and 8 is a power switch for driving. Reference numeral 9 denotes a front brush having a soft brush such as a raised brush, which is rotatably provided in front of the bottom surface of the main body 1 and has a structure in which the surface is covered with raised hair of about 1 mm to 5 mm, for example. The front brush 9 is mounted so as to come into contact with a surface to be cleaned, particularly a hard material floor such as flooring.
[0012]
Reference numeral 10 denotes a rear brush having a hard brush for scraping dust, which is rotatably provided in parallel with the rear of the front brush 9, and is mounted so as to contact particularly when the surface to be cleaned is a carpet. The rear brush 10 is provided with a blade formed of a soft material such as a nylon hair or rubber, for example. Further, the rear brush 10 is connected to the rotary drive body 11 via a connecting means 12 such as a belt. The front brush 9 and the rear brush 10 are disposed so as to have a contact portion 13 with which the front brush 9 and the rear brush 10 abut. The frictional resistance at the time of rotation in the contact portion 13 is set to be larger than the frictional resistance between the front brush 9 and the floor surface.
[0013]
14 is an electric blower built in the back of the main body 1, and 15 is a suction port formed in the main body 1, which is provided above the contact portion 13. Further, the suction port 15 is opened with substantially the same width as the length in the longitudinal direction occupied by the contact portion 13 of the front brush 9 and the rear brush 10. Reference numeral 16 denotes an air passage containing dust that connects the suction port 15 and the dust collecting chamber 17, 18 is a breathable filter provided so as to partition the electric blower 14 and the dust collecting chamber 17, and 19 is the main body 1. An exhaust port 20 provided on the side surface of the main body 1 is a lid provided on the lower surface of the main body 1 and is supported to be openable and closable with respect to the dust collection chamber 17. Reference numeral 21 denotes a battery that sends electric power to the rotary drive body 11 and the electric blower 14, and 22 denotes a shielding piece formed of rubber or the like provided in parallel to the rear brush 10 and behind the rear brush 10.
[0014]
Next, the operation will be described.
When the power switch 8 is turned on, the rotary drive body 11 and the electric blower 14 are energized, the electric blower 14 sucks dust together with air, and the rotary drive body 11 moves the rear brush 10 through the connecting means 12 as shown in FIG. In the direction of the arrow A (rearward, the direction opposite to the direction of travel of the cleaner body 1). At this time, since the front brush 9 is in contact with the rear brush 10 at the contact portion 13, the front brush 9 moves in the direction of the arrow B shown in FIG. , In the direction opposite to the rear brush 10). The air sucked by the electric blower 14 flows between the main body 1 and the surface to be cleaned, for example, through a gap on the side of the main body 1 (arrow C shown in FIG. 3), and passes through the passage 16 via the gap of the contact portion 13. To the dust collection chamber 17. Then, it passes through the filter 18, reaches the electric blower 14, and is discharged from the exhaust port 19 to the outside of the main body 1.
[0015]
Further, the dust on the surface to be cleaned is caught in the rotation of the front brush 9 by coming into contact with the front brush 9, bounced by the rear brush 10, moved to the contact portion 13, discharged upward by centrifugal force, and flowed in. Due to the suction force of air, the air is carried from the suction port 15 through the passage 16 to the dust collecting chamber 17. The dust is blocked by the filter 18 and accumulated in the dust collection chamber 17. The accumulated dust is discharged out of the main body 1 by opening the lid 20.
[0016]
According to the first embodiment, the front brush 9 and the rear brush 10 are mounted so as to be in contact with each other, the rear brush 10 is rotated in the direction opposite to the traveling direction, and the front brush 9 is moved in the direction opposite to the rear brush 10. Since the front brush 9 and the surface to be cleaned are in contact with each other, the dust repelled by the centrifugal force due to the rotation of the rear brush 13 is pushed out to the outside or the wind generated by the centrifugal force is generated. Therefore, it is possible to prevent light dust from being pushed out of the main body 1.
[0017]
Further, since the front brush 9 is provided with a relatively soft brush such as a brushed brush and the rear brush 10 is provided with a harder brush than the front brush 9, a scraping effect and a wiping effect can be obtained at the same time, and cleaning performance is improved. improves.
[0018]
Further, the suction port 15 is provided above the contact portion 13 and is opened with a length substantially the same as the length in the longitudinal direction of the front brush 9 and the rear brush 10, so that the dust released by the centrifugal force of the brush can be directly It can be carried to the passage 16. Therefore, for example, dust can be captured even if the suction force generated by the electric blower 14 is weaker than the conventional one. As a result, the suction force of the electric blower 14 can be suppressed, and the rotational speed of the electric blower 14 can be reduced. Further, the sound generated by driving the electric blower 14 can be reduced. Further, since the dust is sucked into the suction port 15 without moving between the brushes of the rear brush 10 in the longitudinal direction, it can be prevented that the rear brush 10 is entangled with the dust, and the dust is clogged in the vicinity of the suction port 15. Can be prevented.
[0019]
Further, when a carpet having high resistance is cleaned, the rotational speed of the front brush 9 is rapidly decreased as compared with the rotational speed of the rear brush 10, and the amount of slip at the contact portion 13 is increased. The front brush 9 can be prevented from being contaminated by the action of removing the dust and dirt adhering to the front brush 9.
[0020]
Embodiment 2. FIG.
5 is a perspective view of a main body of a vacuum cleaner showing Embodiment 2 of the present invention, FIG. 6 is a cross-sectional view of a main part showing a state of being placed on a floor surface, and FIG. 7 is a main part showing a state of being placed on a carpet surface. FIG. In the figure, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the figure, reference numeral 23 denotes a holder attached to the front brush 9 and rotatably provided on the main body 1 by a rotating shaft 24. The front brush 9 and the rear brush 10 come into contact with each other as in the first embodiment. It is provided in the state which has. When the main body 1 cleans a flat floor surface, the front brush 9 is in contact with the surface to be cleaned by the weight of the holder 23, and the front brush 9 is in contact with the rear brush 10. The front brush 9 rotates in the direction opposite to the rotation direction of the rear brush 10 as the rear brush 10 rotates. When the main body 1 cleans an uneven surface to be cleaned or a carpet, the front brush 9 is pushed upward by the unevenness or the hair of the carpet, and as shown in FIG. Rotates upward together with the holder 23. A constant load is always applied to the surface to be cleaned by the dead weight of the holder 23 and the front brush 9, and the front brush 9 is pressing the surface to be cleaned. Further, since the front brush 9 is pushed upward, it is not in contact with the rear brush 10 and the load on the rear brush 10 is reduced.
[0021]
According to the second embodiment, when cleaning the carpet, the front brush 9 moves upward, so that the wear of the front brush 9 or the carpet can be minimized. Further, at the same time as the front brush 9 moves upward, the front brush 9 is not in contact with the rear brush 10, and the load on the rear brush 10 by the front brush 9 is eliminated. It is possible to prevent 11 from causing an abnormal temperature rise. When the carpet moves from the carpet to the floor surface, the front brush 9 moves downward again, comes into contact with the rear brush 10, and the front brush 9 rotates in conjunction with the rotation of the rear brush 10.
[0022]
Embodiment 3 FIG.
8 is a perspective view of an electric vacuum cleaner main body showing Embodiment 3 of the present invention, FIG. 9 is a cross-sectional view of a main part showing a state where the front brush is lowered, and FIG. 10 is a main part showing a state where the front brush is raised. FIG. 11 is an enlarged view showing the operation of the switching lever. In the figure, the same components as those in the first or second embodiment are denoted by the same reference numerals and description thereof is omitted. In the figure, reference numeral 25 denotes a switching lever for arbitrarily switching the front brush 9 and the rear brush 10 between contact and non-contact. Reference numeral 26 denotes an operation unit interlocked with the switching lever 25. When the switching lever 25 is slid, it projects on the back surface of the holder 23. It is provided so as to be in contact with the provided protrusion 27. As shown in FIGS. 11 (a) and 11 (b), when the switching lever 25 is moved in the direction of arrow D, the operating portion 26 moves together with the switching lever 25, contacts the protrusion 27 and lifts the holder 23 in the direction of arrow E. . At this time, the front brush 9 is also lifted in the E direction and the front brush 9 and the rear brush 10 are not in contact with each other as shown in FIG. 10, so that the burden on the rotary drive body 11 can be eased. . Further, wear of the front brush 9 or the carpet can be minimized.
[0023]
Embodiment 4 FIG.
12 is a cross-sectional view of the main part of the electric vacuum cleaner main body showing the fourth embodiment of the present invention, and FIG. 13 is an enlarged view showing the operation of the brush. In the figure, the same reference numerals are used for the same components as in the first embodiment. The description is omitted. In the fourth embodiment, the front brush 9 is installed so that the front brush 9 protrudes forward from the front wall 28 of the front end portion 1a of the main body 1 or the peripheral edge of the front brush 9 is substantially at the same position as the front wall 28. Show things. Since the front brush 9 is provided so as to contact the rear brush 10 as in the first embodiment, the front brush 9 is interlocked with the rotation of the rear brush 10 in the direction of arrow A as shown in FIG. Rotates in the direction opposite to the rear brush 10 and in the direction of arrow B. With this structure, when the front brush 9 and the rear brush 10 are rotating, when the main body 1 is brought close to the furniture or the like at the wall, the front wall 28 comes into contact with the wall or the front brush 9 is moved to the wall ( Or furniture etc.) and dust collected on the corners of the floor can be scraped. Further, when the front brush 9 is installed so as to protrude forward from the front wall 28, when the front brush 9 is applied to a wall, furniture, etc., the peripheral portion of the front brush 9 hits the wall, furniture, etc. Since it does not hit furniture, damage to walls, furniture, etc. can be prevented.
[0024]
Embodiment 5 FIG.
FIG. 14 is an enlarged cross-sectional view of a vacuum cleaner body showing Embodiment 5 of the present invention. In the figure, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the figure, reference numeral 29 denotes a front lower portion which is a part of the front end portion 1 a of the vacuum cleaner body 1, and has a front wall 30 and an inner wall 31 formed along the peripheral edge of the front brush 9. The front wall 30 is provided so as to cover the upper half portion of the front brush 9, and the inner wall 31 is provided so that the gap with the front brush 9 is within 1 mm. Further, since the front brush 9 is provided so as to contact the rear brush 10 as in the first embodiment, the front brush 9 is reverse to the rear brush 10 in conjunction with the rotation of the rear brush 10 in the direction of arrow A. Direction, arrow B direction. With this configuration, dust having a diameter of 1 mm or more is sucked from the suction port 15 through the contact portion 13 by the rotation of the front brush 9 and the rear brush 10, and part of the dust having a diameter of 1 mm or less is formed between the front brush 9 and the inner wall 31. After passing through, it is discharged in the downward F direction and is again stirred by the front brush 9. Accordingly, since the front lower portion 29 is provided on the upper portion of the front brush 9, dust can be reliably captured without blowing out particularly fine solid dust or the like, and the front brush 9 can be smoothly rotated. be able to.
[0025]
The size relationship between the front brush 9 and the rear brush 10 may be configured such that the brush of the front brush 9 and the rear brush 10 are in contact with each other by making the diameter of the rear brush 10 larger than the diameter of the front brush 9. . With this configuration, the front brush 9 rotates in the direction opposite to the rear brush 10 in conjunction with the rotation operation of the rear brush 10. Further, since the diameter of the front brush 9 is smaller, it rotates faster than the rear brush 10. Then, when placed on the surface to be cleaned and cleaned in this state, the front brush 9 is decelerated due to the frictional resistance with the surface to be cleaned, and slips between the rear brush 10 and the rear brush 10 at the contact portion 13. The rotation of the front brush 9 decelerates more than the rotation of. This slip allows the rear brush 10 to scrape dust adhering to the front brush 9 and remove the dirt on the front brush 9. Further, as the front brush 9 has a smaller diameter, there is also an effect that the raised brush can easily reach dust collected at the corners of the wall and the floor.
[0026]
Further, the diameter of the rear brush 10 may be made smaller than the diameter of the front brush 9 so as to be in contact with the front brush 9 and the rear brush 10. With this configuration, the front brush 9 rotates in the direction opposite to the rear brush 10 in conjunction with the rotation operation of the rear brush 10. Further, since the diameter of the front brush 9 is larger, it rotates at a lower speed than the rear brush 10. And when it puts on a to-be-cleaned surface in this state and cleans, the deceleration of the front brush 9 becomes larger than the case where the diameter of the rear brush 10 is enlarged, and slip between the rear brushes 10 increases. Accordingly, it is possible to further improve the performance of removing dirt on the front brush 9 by scraping the dust adhering to the front brush 9 by the hair and spatula of the rear brush 10. Further, since the front brush 9 has a large surface area and a small number of revolutions, there is an effect that the wear is small and the life is prolonged.
[0027]
Embodiment 6 FIG.
15 is a cross-sectional view showing the internal structure of a vacuum cleaner body according to Embodiment 6 of the present invention, and FIG. 16 is a cross-sectional view of the vacuum cleaner body showing a state in which dust is sucked. In the figure, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the figure, 32 is an exhaust air passage cut off from the passage 16, and as shown in FIG. 15, openings 33 and 34 for guiding the air discharged from the electric blower 14 to the rotary drive body 11 are provided. . A discharge port 35 is formed behind the rear brush 10 and in front of the shielding piece 22 and communicates with the openings 33 and 34 to form an exhaust air passage 32. With this configuration, all or part of the air sucked by the electric blower 14 passes through the discharge port 35 while cooling the rotary drive body 11 through the exhaust air passage 32, and between the rear brush 10 and the shielding piece 22. Spray on. By this blowing wind, dust between the rear brush 10 and the shielding piece 22 that could not be scraped off by the rear brush 10 is raised and moved toward the rear brush 10 to absorb the dust, thus preventing dust from remaining. Can do. In addition, the amount of exhaust is reduced or it does not come out to the outside at all, and it is possible to suppress the dust from being rolled up on the surface to be cleaned.
[0028]
Embodiment 7 FIG.
FIG. 17 is a cross-sectional view of an electric vacuum cleaner main body showing Embodiment 7 of the present invention, FIG. 18 is a cross-sectional view taken along line FF shown in FIG. 17, and FIG. 19 is a cross-sectional view showing a dust suction state. Reference numeral 36 denotes an air passage forming portion provided above the suction port 15, and is installed along the suction port 15 with substantially the same width as the suction port 15. A throttle port 37 is formed behind the air passage forming portion 36 and communicates with the dust collection chamber 17 and has an opening area smaller than the opening area of the passage 16. The air passage forming unit 36 has an inclined ceiling 38 so that the height increases as it approaches the throttle port 37, and the opening area increases as it approaches the throttle port 37. With this configuration, as shown in FIG. 19, among the dust scraped upward by the front brush 9 and the rear brush 10, dust blown out in front of the throttle port 37 is sucked from the throttle port 37 and collected. It is taken into the chamber 17. Dust that cannot be flipped directly to the front surface of the throttle port 37 hits the inclined ceiling 38, falls at an angle changed to the throttle port 37 side, and is further flipped upward again by the front brush 9 and the rear brush 10. This operation is repeated until dust reaches the aperture 37 and is sucked from the aperture 37. Thereby, since dust moves to the aperture 37 using the space between the front brush 9 and the rear brush 10 and the inclined ceiling 38, large dust such as paper waste can also pass through. Further, since the cross-sectional area is narrowed once between the suction port 15 and the passage 16 by the throttle port 37, it becomes possible to increase the suction speed, and the dust blown up by the front brush 9 and the rear brush 10 is collected. The force that moves to the dust chamber 17 can be increased. Therefore, it is possible to improve the dust collecting power.
[0029]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0030]
According to the present invention, dust sandwiched between the front and rear brushes can be directly conveyed to the suction port by centrifugal force. In addition, there is an effect that dust repelled by the centrifugal force generated by the rotation of the rear brush can be prevented from being pushed out and the dust can be prevented from being pushed out by the wind generated by the centrifugal force. In addition, there is an effect that the wall and furniture can be cleaned cleanly. Moreover, the force which moves the dust flipped up by the front brush and the rear brush to the dust collecting chamber can be increased, and the dust collecting force can be improved.
[0031]
In addition, since the suction port opens with the same width as the longitudinal width of the contact portion of the front brush and the rear brush, the dust sandwiched by the contact portion can be directly carried to the suction port, and the dust absorption performance Is good.
[0032]
In addition, the front brush is provided with soft brushes such as raising brushes for wiping the floor surface, and the rear brush is provided with a harder brush than the front brush for scraping dust from the carpet. Can be obtained at the same time.
[0033]
In addition, a support member that supports the front brush so as to be rotatable and is supported so as to be movable up and down with respect to the cleaner body is provided. The support member moves the front brush up and down relative to the cleaner body, and the front brush noncontact between the front brush and rear brush according to the vertical movement, so switches the contact, it can be pre-brush wear, obtaining suppress the wear of the surface to be cleaned. In addition, since the load on the rear brush by the front brush is eliminated, for example, the burden on the rotary drive that rotates the rear brush is reduced, and it is possible to prevent the rotary drive from causing an abnormal temperature increase. It is.
[Brief description of the drawings]
FIG. 1 is a perspective view of an entire electric vacuum cleaner showing a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of the electric vacuum cleaner main body showing Embodiment 1 of the present invention.
FIG. 3 is a transverse sectional view showing the internal structure of the electric vacuum cleaner main body showing Embodiment 1 of the present invention.
FIG. 4 is a cross-sectional view of the electric vacuum cleaner main body showing Embodiment 1 of the present invention.
FIG. 5 is a perspective view of an electric vacuum cleaner main body showing Embodiment 2 of the present invention.
FIG. 6 is a cross-sectional view of a main part showing a state where a vacuum cleaner according to Embodiment 2 of the present invention is placed on a floor surface.
FIG. 7 is a cross-sectional view of the main part showing the state of being placed on the carpet surface.
FIG. 8 is a perspective view of a vacuum cleaner main body showing Embodiment 3 of the present invention.
FIG. 9 is a cross-sectional view of a main part showing a state where a front brush is lowered.
FIG. 10 is a cross-sectional view of a main part showing a state where a front brush is raised.
FIG. 11 is an enlarged view showing the operation of the switching lever.
FIG. 12 is a cross-sectional view of a main part of a vacuum cleaner main body showing Embodiment 4 of the present invention.
FIG. 13 is an enlarged view showing the operation of the brush.
FIG. 14 is an enlarged cross-sectional view of a vacuum cleaner body showing a fifth embodiment of the present invention.
FIG. 15 is a cross-sectional view showing an internal structure of a vacuum cleaner body according to Embodiment 6 of the present invention.
FIG. 16 is a cross-sectional view of the main body of the vacuum cleaner showing a state in which dust is sucked from the vacuum cleaner.
FIG. 17 is a cross-sectional view of a main body of a vacuum cleaner showing Embodiment 7 of the present invention.
18 is a cross-sectional view taken along line FF shown in FIG.
FIG. 19 is a cross-sectional view showing a dust suction state of the electric vacuum cleaner.
FIG. 20 is a plan view showing a conventional electric vacuum cleaner.
FIG. 21 is a cross-sectional view showing a suction port chamber of a conventional electric vacuum cleaner.
[Explanation of symbols]
1 body, 2 upper case, 3 lower case, 4 pipe, 5 connecting part,
6 handle, 7 wheels, 8 power switch, 9 front brush, 10 rear brush,
11 rotation drive body, 12 connection means, 13 contact part, 14 electric blower,
15 suction port, 16 air passages, 17 dust collection chamber, 18 filter, 19 exhaust port,
20 lid, 21 battery, 22 shielding piece, 23 holder, 24 rotation axis,
25 switching lever, 26 operation part, 27 protrusion, 28 front wall, 29 front lower part,
30 front wall, 31 inner wall, 32 exhaust air duct, 33 opening, 34 opening,
35 Exhaust port, 36 Air channel formation part, 37 Restriction port, 38 Inclined ceiling.

Claims (5)

A front brush provided in front of the cleaner body, a rear brush provided in contact with the front brush behind the front brush, and the contact portion above the contact portion of the front brush and the rear brush. The rear brush rotates in a direction opposite to the direction of travel of the cleaner body, and the front brush is interlocked with the rotation of the rear brush. The front brush rotates in the opposite direction, and the front peripheral portion protrudes forward from the inside of the wall forming a part of the suction port at the front end of the cleaner body with respect to the traveling direction of the cleaner body. is installed so that,
An air passage forming member is provided above the suction port, and the air passage forming member is formed to communicate with a dust collection chamber provided at the rear of the cleaner body with an opening area smaller than the suction port. The ceiling of the air passage forming member has an inclined portion so that the passage area increases as it approaches the opening, and of the dust scraped upward by the front brush and the rear brush, it projects to the front of the opening. The dust collected from the opening is sucked into the dust collection chamber, and the dust that cannot be flipped up to the front of the opening is applied to the inclined portion to change the angle toward the opening, and is dropped by the front brush and the rear brush. An electric vacuum cleaner characterized by repeating the operation of flipping up again until dust reaches the opening .   The vacuum cleaner according to claim 1, wherein the suction port opens with substantially the same width as a width in a longitudinal direction of the contact portion of the front brush and the rear brush.   The front brush is provided with a soft brush such as a raised brush for wiping the floor surface, and the rear brush is provided with a brush harder than the front brush for scraping dust from a carpet. The vacuum cleaner according to 1 or 2. A support member that supports the front brush so as to be rotatable and is supported so as to be movable up and down with respect to the cleaner body is provided, and the support member moves the front brush upward with respect to the cleaner body. claims 1 to 3, characterized in that for switching the rear brush and the front brush in a non-contact, in contact with the rear brush and the front brush by moving down the front brush relative to the cleaner body by The vacuum cleaner as described in any one of. Vacuum cleaner according to any one of claims 1 to 4 wherein the rear brush is characterized in that it is driven by the rotary drive member.

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