US20100107357A1 - Electric vacuum cleaner - Google Patents
Electric vacuum cleaner Download PDFInfo
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- US20100107357A1 US20100107357A1 US12/611,544 US61154409A US2010107357A1 US 20100107357 A1 US20100107357 A1 US 20100107357A1 US 61154409 A US61154409 A US 61154409A US 2010107357 A1 US2010107357 A1 US 2010107357A1
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- vicinity
- suction port
- brush unit
- rotary shaft
- port portion
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
- A47L9/04—Nozzles with driven brushes or agitators
- A47L9/0405—Driving means for the brushes or agitators
- A47L9/0411—Driving means for the brushes or agitators driven by electric motor
Definitions
- the present invention relates to an electric vacuum cleaner having a suction port portion and a handle portion.
- Japanese Patent Unexamined Publication No. 2-7923 discloses a technology in which a suction port portion is provided with a self-propelling roller or a rotary brush itself is actively brought into contact with a floor surface so as to have a self-propelling property.
- An object of the invention is to provide an electric vacuum cleaner capable of changing a direction of a suction port portion to a desired changing direction and reducing the burden applied to a user's wrist.
- an electric vacuum cleaner including: a cleaner body portion which has an electric blower for generating a suction wind; a suction port portion which sucks dust together with the suction wind; a handle portion which moves the suction port portion; a rotary brush unit which is disposed inside the suction port portion and in which two rotary shaft bodies each having a brush are disposed in series; a rotary brush unit driving portion which separately rotates each of the rotary shaft bodies; and a rotation speed difference generating mechanism which generates a difference in the rotation speed between two rotary shaft bodies.
- the rotary brush unit includes two rotary shaft bodies, and the rotation speed difference generating mechanism generates a difference in the rotation speed between two rotary shaft bodies. For this reason, it is possible to easily change the direction of the suction port portion to the desired changing direction. Accordingly, since it is possible to remarkably reduce a burden during a cleaning operation, it is possible to more comfortably perform the cleaning operation which is a comparatively heavy labor in the housework.
- FIG. 1 is an entire perspective view showing a cleaner body portion of an electric vacuum cleaner according to a first embodiment of the invention.
- FIG. 2 is a partially sectional view showing a suction port portion according to the embodiment.
- FIG. 3 is a block diagram showing a configuration of an electric controller according to the embodiment.
- FIG. 4 is an entire perspective view showing the cleaner body portion of the electric vacuum cleaner according to a second embodiment of the invention.
- FIG. 5 is a plan view showing a rotary brush unit of the electric vacuum cleaner according to a third embodiment of the invention.
- FIG. 6 is a plan view showing the rotary brush unit of the electric vacuum cleaner according to a fourth embodiment of the invention.
- FIG. 7 is a plan view showing the rotary brush unit of the electric vacuum cleaner according to a fifth embodiment of the invention.
- FIG. 8 is a plan view showing the rotary brush unit of the electric vacuum cleaner according to a sixth embodiment of the invention.
- FIG. 9 is a plan view showing the rotary brush unit of the electric vacuum cleaner according to a seventh embodiment of the invention.
- FIG. 1 is an entire perspective view showing a cleaner body portion of an electric vacuum cleaner according to a first embodiment of the invention.
- FIG. 2 is a partially sectional view showing a suction port portion according to the embodiment when seen from the bottom of the suction port portion.
- an electric vacuum cleaner includes suction port portion 1 which sucks dust, handle portion 11 which moves suction port portion 1 , and cleaner body portion 12 of which a lower portion is provided with suction port portion 1 and an upper portion is provided with handle portion 11 .
- Cleaner body portion 12 includes an electric blower for generating a suction wind.
- Suction port portion 1 sucks dust together with the suction wind generated by the electric blower.
- Switch lever portion 10 is attached onto handle portion 11 .
- Switch lever portion 10 is attached to a position where switch lever portion 10 is operable by a finger when gripping handle portion 11 using a hand. When switch lever portion 10 is pushed down in the left and right direction, as depicted by the arrow, suction port portion 1 is controlled so that the direction thereof is changed to the direction in which switch lever portion 10 is pushed down.
- Rotary brush unit 2 is disposed inside suction port portion 1 .
- Rotary brush unit 2 includes two rotary shaft bodies 2 A and 2 B.
- Brush 3 is disposed in surfaces of rotary shaft bodies 2 A and 2 B.
- brush 3 is formed as a so-called bristle transplant brush in which bristles are tied and transplanted inside a hole, but may be formed as a brush in which a narrow raised fabric is inserted and fixed into an undercut groove or a bonded brush.
- Each of the rotary shaft bodies 2 A and 2 B is provided with driving motor 4 and decelerating gear 5 .
- Driving motor 4 is connected to decelerating gear 5 to thereby form a rotary brush unit driving portion.
- An output shaft of decelerating gear 5 is fixed to each of rotary shaft bodies 2 A and 2 B. With such a configuration, when driving motors 4 are driven, rotary shaft bodies 2 A and 2 B located in the peripheries thereof rotate.
- a rotary mechanism is constituted by only rotary brush unit 2 in such a manner that driving motor 4 and decelerating gear 5 are disposed inside each of rotary shaft bodies 2 A and 2 B. Accordingly, it is not necessary to dispose a large component such as a driving motor in the inside of suction port portion 1 . For this reason, it is possible to decrease the size of suction port portion 1 . That is, it is possible to realize suction port portion 1 which can move and turn slightly and has good operability or cleaner body portion 12 which is small in size and low in weight.
- the length of brush 3 is set to a length at which brush 3 slightly comes into contact with a floor surface. For this reason, when rotary shaft bodies 2 A and 2 B rotate in a direction (positive direction) in which suction port portion 1 is pushed forward, suction port portion 1 propels itself, thereby improving the operability of cleaner body portion 12 . That is, when driving motors 4 inside rotary shaft bodies 2 A and 2 B rotate at the same speed (including substantially the same speed) in the same direction (positive direction), suction port portion 1 propels itself forward.
- each of rotary shaft bodies 2 A and 2 B is driven by a separate driving motor 4 .
- a separate driving motor 4 it is possible to independently change the rotation speeds thereof.
- the right driving motor on the user side rotates faster than the left driving motor or only the right driving motor rotates, a direction of suction port portion 1 is changed to the left direction.
- the left driving motor rotates faster than the right driving motor or only the left driving motor rotates, the direction of suction port portion 1 is changed to the right direction.
- FIG. 3 is a block diagram showing a circuit of the electric vacuum cleaner according to this embodiment.
- motor 35 for driving the electric blower generating the suction wind is connected in parallel to AC power source 36 .
- Power switch portion 37 controlling an on-off state of motor 35 is disposed close to handle portion 11 of cleaner body portion 12 (not shown in FIG. 1 ).
- Driving motor 38 A one driving motor 4 shown in FIG. 2
- Driving motor 38 B for driving rotary shaft body 2 A is connected in series to rotary shaft body switch portion 39 A for controlling the on-off state of driving motor 38 A.
- driving motor 38 B (the other driving motor 4 shown in FIG.
- Rotary shaft body switch portions 39 A and 39 B are operated in an interlocking manner as depicted by the dotted line by switch lever portion 10 .
- switch lever portion 10 turns on rotary shaft body switch portions 39 A and 39 B, and rotates driving motors 38 A and 38 B at the same speed in the same direction (positive direction). Accordingly, suction port portion 1 propels itself forward.
- switch lever portion 10 controls driving motors 38 A and 38 B inside rotary shaft bodies 2 A and 2 B so that the direction of suction port portion 1 is changed to the direction in which switch lever portion 10 is pushed down.
- switch lever portion 10 when switch lever portion 10 is pushed down in the right direction, only left driving motor 38 B on the user side rotates in the positive direction. For this reason, it is possible to easily change the direction of suction port portion 1 to the right direction.
- switch portion 39 A of rotary shaft body 2 A and switch portion 39 B of rotary shaft body 2 B are interlocked with each other so that right driving motor 38 A on the user side rotates in a direction opposite to the rotation direction of driving motor 38 B, it is possible to more easily change the direction of suction port portion 1 to the right direction.
- switch portion 39 A of rotary shaft body 2 A and switch portion 39 B of rotary shaft body 2 B are interlocked with each other so that right driving motor 38 A on the user side rotates slower than driving motor 38 B, it is possible to more easily change the direction of suction port portion to the right direction. In any case, there is a difference in the rotation speed between rotary shaft bodies 2 A and 2 B.
- switch portion 39 A of rotary shaft body 2 A and switch portion 39 B of rotary shaft body 2 B are interlocked with each other as below.
- Switch portion 39 A of rotary shaft body 2 A and switch portion 39 B of rotary shaft body 2 B are interlocked with each other so that only right driving motor 38 A on the user side rotates in the positive direction, left driving motor 38 B on the user side rotates in a direction opposite to the rotation direction of driving motor 38 A, or left driving motor 38 B on the user side rotates more slowly than driving motor 38 A when switch lever portion 10 is pushed down in the left direction.
- rotation speed difference generating mechanisms are separately disposed in each of rotary shaft bodies 2 A and 2 B, and include separately rotating driving motors 38 A and 38 B, rotary shaft body switch portions 39 A and 39 B, and switch lever portion 10 .
- the direction of suction port portion 1 can be changed by generating a difference in the rotation speed between two rotary shaft bodies 2 A and 2 B. For this reason, it is possible to reduce a burden applied to an arm or wrist upon changing the direction of suction port portion 1 in the left and right direction.
- suction port portion 1 propels itself in accordance with the rotation of rotary shaft bodies 2 A and 2 B. For this reason, since suction port portion 1 propels itself forward or backward during a cleaning operation, it is possible to reduce the burden during the cleaning operation.
- suction port portion 1 propels itself in accordance with the rotation of rotary shaft bodies 2 A and 2 B. For this reason, since there is a difference in the rotation speed between two rotary shaft bodies 2 A and 2 B, it is possible to reduce the burden applied to the arm or wrist upon changing the direction of suction port portion 1 .
- driving motor 4 is disposed inside each of rotary shaft bodies 2 A and 2 B. For this reason, it is possible to decrease the size of suction port portion 1 and to easily handle suction port portion 1 in a narrow space. In addition, it is possible to dispose rotary brush unit 2 in substantially the entire width of suction port portion 1 , and to improve a cleaning performance for cleaning a side wall.
- handle portion 11 includes switch lever portion 10 which is operable in the left and right direction, and the rotation of two rotary shaft bodies 2 A and 2 B of rotary brush unit 2 is controlled so that the direction of suction port portion 1 is changed to the direction in which switch lever portion 10 is operated. For this reason, it is possible to change the direction of suction port portion 1 just by using a finger tip without performing a large action in which handle portion 11 is twisted or pushed down.
- FIG. 4 is an entire perspective view showing the electric vacuum cleaner according to a second embodiment of the invention.
- This embodiment is different from the first embodiment in that switch lever portion 10 is not provided.
- handle portion 11 which is twistable in the left and right direction is provided.
- the rotation speed of two rotary shaft bodies 2 A and 2 B disposed in rotary brush unit 2 inside suction port portion 1 is controlled through the electric controller (not shown) so that the direction of suction port portion 1 is changed to the twisting direction of handle portion 11 .
- the twisting amount becomes large, the difference in the rotation speed between rotary shaft bodies 2 A and 2 B becomes large, and the turning amount becomes large.
- suction port portion rotates forward. Since the other configurations are same as those of the first embodiment, detailed description thereof will be omitted.
- handle portion 11 is twistable in the left and right direction.
- handle portion 11 is twisted in the left and right direction, the rotation of two rotary shaft bodies 2 A and 2 B of rotary brush unit 2 is controlled so that the direction of suction port portion 1 is changed to the twisting direction of handle portion 11 . Accordingly, it is possible to change the self-propelling direction of the suction port portion while having the same feeling of operation as with a general cleaner having an oscillation mechanism.
- FIG. 5 is a plan view showing rotary brush unit 2 inside suction port portion 1 of the electric vacuum cleaner according to a third embodiment of the invention.
- Rotary shaft bodies 2 A and 2 B constituting rotary brush unit 2 are rotatably connected to each other through connection portion 30 .
- Connection portion 30 is formed as a simple bearing, and a difference in the rotation speed between rotary shaft bodies 2 A and 2 B is absorbed by connection portion 30 .
- Brush 3 is attached to surfaces of rotary shaft bodies 2 A and 2 B.
- Stiff brushes 3 A depicted by the solid line are attached to predetermined ranges 101 of rotary brush unit 2 .
- Soft brush 3 B depicted by the dotted line is attached to predetermined ranges 102 at the center of rotary brush unit 2 . Since the other configurations are the same as those of the first embodiment, detailed description thereof will be omitted.
- the direction of the suction port portion is changed by generating a difference in the rotation speed between the driving motors using switch lever portion 10 of the first embodiment or handle portion 11 B, which is twistable, of the second embodiment.
- the brush 3 since the brush 3 includes stiff brushes 3 A in the vicinity of both ends of rotary brush unit 2 and soft brushes 3 B in the vicinity of the center thereof, it is possible to more efficiently turn suction port portion 1 .
- the stiffness of each of the brushes 3 in the vicinity of both ends of rotary brush unit 2 is set to be larger than that in the vicinity of the center thereof. Accordingly, since it is possible to improve the direction changing force of suction port portion 1 , it is possible to change the self-propelling direction even on a floor surface having a high resistance such as a deep carpet.
- FIG. 6 is a plan view showing rotary brush unit 2 inside suction port portion 1 of the electric vacuum cleaner according to a fourth embodiment of the invention.
- rotary shaft bodies 2 A and 2 B constituting rotary brush unit 2 the outer diameter of range 110 in the vicinity of the center of rotary brush unit 2 is small, and the outer diameter becomes large toward both ends.
- the length of brush 3 attached to rotary shaft bodies 2 A and 2 B becomes shorter as the outer diameters of rotary shaft bodies 2 A and 2 B become larger. That is, in each of rotary shaft bodies 2 A and 2 B, brush 3 includes brushes 3 C and 3 D of which the lengths becomes short in a direction from the center to both ends.
- the outer diameter of brush 3 up to the end of the bristle is substantially uniform throughout the entire width of the rotary brush unit 2 . Since the other configurations are same as those of the first embodiment, detailed description thereof will be omitted.
- the direction of the suction port portion is changed by generating a difference in the rotation speed between the driving motors using switch lever portion 10 of the first embodiment or handle portion 11 B, which is twistable, of the second embodiment.
- brush 3 since brush 3 includes brushes 3 C and 3 D of which the lengths become short in a direction from the center of rotary brush unit 2 to both ends thereof, it is possible to more efficiently turn suction port portion 1 .
- the outer diameter of each of rotary shaft bodies 2 A and 2 B in the vicinity of both ends of rotary brush unit 2 is set to be larger than that in the vicinity of the center thereof.
- the length of each of brushes 3 in the vicinity of both ends of rotary brush unit 2 is set to be shorter than that in the vicinity of the center thereof, and the outer diameter of each of brushes 3 up to the end of the bristle in the vicinity of both ends of rotary brush unit 2 is set to be same as that in the vicinity of the center thereof. Accordingly, it is possible to improve the direction changing force of suction port portion 1 , and to change the self-propelling direction even on a floor surface having a large sliding resistance such as a deep carpet.
- each of brushes 3 up to the end of the bristle is set to be uniform, it is possible to have uniform contact with a floor surface. Accordingly, it is possible to obtain a uniform suction function and a uniform self-propelling function throughout the entire width of rotary brush unit 2 .
- FIG. 7 is a plan view showing rotary brush unit 2 inside suction port portion 1 of the electric vacuum cleaner according to a fifth embodiment of the invention.
- the length of brush 3 is short in range 110 in the vicinity of the center of rotary brush unit 2 , and becomes longer toward both ends.
- the outer diameter of brush 3 up to the end of the bristle is depicted by one-dot chain line P 2 . That is, brush 3 includes brushes 3 E and 3 F which are respectively disposed in rotary shaft bodies 2 A and 2 B so that the lengths thereof become longer in a direction from the center of rotary brush unit 2 to both ends thereof. Since the other configurations are same as those of the first embodiment, detailed description thereof will be omitted.
- the direction of the suction port portion can be changed by generating a difference in the rotation speed between the driving motors using switch lever portion 10 of the first embodiment or handle portion 11 B, which is twistable, of the second embodiment.
- brush 3 since brush 3 includes brushes 3 E and 3 F of which the lengths become longer in a direction from the center of rotary brush unit 2 to both ends thereof, it is possible to more efficiently turn suction port portion 1 .
- the length of each of brushes 3 in the vicinity of both ends of rotary brush unit 2 is set to be longer than that in the vicinity of the center thereof. Accordingly, since it is possible to improve the direction changing force of suction port portion 1 , it is possible to change the self-propelling direction even on a floor surface having a large resistance such as a deep carpet. Further, since the distance from the center of the attachment portion of brush 3 is uniform, it is possible to easily perform a transplanting operation using an automatic machine.
- FIG. 8 is a plan view showing rotary brush unit 2 inside suction port portion 1 of the electric vacuum cleaner according to a sixth embodiment of the invention.
- brush 3 is attached to the surfaces of rotary shaft bodies 2 A and 2 B constituting rotary brush unit 2 .
- the pitch between brushes 3 attached to predetermined ranges 120 of both ends of rotary brush unit 2 is narrow.
- the pitch at predetermined range 121 in the vicinity of the center of rotary brush unit 2 is wide. That is, brush 3 includes high-density brush 3 G attached to both ends of rotary brush unit 2 and low-density brush 3 H attached to the vicinity of the center thereof. Since the other configurations are same as those of the first embodiment, detailed description thereof will be omitted.
- the direction of the suction port portion is changed by generating a difference in the rotation speed between the driving motors using switch lever portion 10 of the first embodiment or handle portion 11 B, which is twistable, of the second embodiment.
- brush 3 since brush 3 includes high-density brush 3 G attached to both ends of rotary brush unit 2 and low-density brush 3 H attached to the vicinity of the center thereof, it is possible to more efficiently turn suction port portion 1 .
- the density of each of brushes 3 in the vicinity of both ends of rotary brush unit 2 is set to be higher than that in the vicinity of the center thereof.
- brush 3 of each of rotary shaft bodies 2 A and 2 B is formed with a comb tooth shape, and the pitch of the comb tooth shape of each of brushes 3 in the vicinity of both ends of rotary brush unit 2 is set to be denser than that of each of brushes 3 in the vicinity of the center thereof. Accordingly, since it is possible to improve the direction changing force of suction port portion 1 , it is possible to change the self-propelling direction even on a floor surface having a high resistance such as a deep carpet. In addition, since it is possible to make the type, stiffness, and length of the bristles of brush 3 uniform throughout the entire width of brush unit 2 , it is possible to improve the productivity.
- FIG. 9 is a plan view showing rotary brush unit 2 inside suction port portion 1 of the electric vacuum cleaner according to a seventh embodiment of the invention.
- brush 3 is attached to the surfaces of rotary shaft bodies 2 A and 2 B constituting rotary brush unit 2 .
- four lines of brushes 3 I are respectively attached to predetermined ranges 130 of both ends of rotary brush unit 2 .
- Two lines of brushes 3 J are attached to range 131 in the vicinity of the center of rotary brush unit 2 . Since the other configurations are same as those of the first embodiment, detailed description thereof will be omitted.
- the direction of the suction port portion is changed by generating a difference in the rotation speed between the driving motors using switch lever portion 10 of the first embodiment or handle portion 11 B, which is twistable, of the second embodiment.
- brush 3 since brush 3 includes four lines of brushes 3 I in both ends of rotary brush unit 2 and two lines of brushes 3 J in the vicinity of the center thereof, it is possible to more efficiently turn suction port portion 1 .
- brushes 3 of rotary shaft bodies 2 A and 2 B are formed in a stripe shape, and the number of lines of brushes 3 in the vicinity of both ends of rotary brush unit 2 is larger than that of brushes 3 in the vicinity of the center thereof. Accordingly, since it is possible to improve the direction changing force of suction port portion 1 , it is possible to change the self-propelling direction even on a floor surface having a high resistance such as a deep carpet. In addition, since it is possible to make the type, stiffness, length, and transplanting pitch of the bristles of brush 3 uniform throughout the entire width of brush unit 2 , it is possible to improve the productivity.
- the electric vacuum cleaner includes the cleaner body portion which has the electric blower for generating a suction wind; the suction port portion which sucks dust together with the suction wind; the handle portion which moves the suction port portion; the rotary brush unit which is disposed inside the suction port portion and in which two rotary shaft bodies each having a brush are disposed in series; the rotary brush unit driving portion which separately rotates each of the rotary shaft bodies; and the rotation speed difference generating mechanism which generates a difference in the rotation speed between two rotary shaft bodies.
- the suction port portion propels itself in accordance with the rotation of the rotary shaft bodies. With such a configuration, since the suction port portion propels itself forward or backward during the cleaning operation, it is possible to reduce the burden applied to the arm or wrist.
- the rotary brush unit driving portion is configured as the driving motor disposed inside each of the rotary shaft bodies. With such a configuration, it is possible to decrease the size of the suction port portion and to easily handle the suction port portion in a narrow space. In addition, it is possible to dispose the rotary brush unit in substantially the entire width of the suction port portion, and to improve the cleaning performance for cleaning a side wall.
- the handle portion includes the switch lever portion which is operable in the left and right direction, and controls the rotation of two rotary shaft bodies of the rotary brush unit so that the direction of the suction port portion is changed to the operation direction of the switch lever portion.
- the handle portion is twistable in the left and right direction.
- the rotation of two rotary shaft bodies of the rotary brush unit is controlled so that the direction of the suction port portion is changed to the twisting direction of the handle portion.
- the stiffness of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be larger than that in the vicinity of the center thereof.
- the outer diameter of each of the rotary shaft bodies in the vicinity of both ends of the rotary brush unit is set to be larger than that in the vicinity of the center thereof.
- the length of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be shorter than that in the vicinity of the center thereof, and the outer diameter of each of the brushes up to the end of the bristle in the vicinity of both ends of the rotary brush unit is set to be same as that in the vicinity of the center thereof
- the length of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be longer than that in the vicinity of the center thereof
- the density of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be higher than that in the vicinity of the center thereof
- the brushes of each of the rotary shaft bodies are formed with a comb tooth shape, and the pitch of the comb tooth shape of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be denser than that in the vicinity of the center thereof.
- the brush of the rotary shaft body is formed in a stripe shape, and the number of lines of the brushes in the vicinity of both ends of the rotary brush unit is set to be larger than that in the vicinity of the center thereof.
- the advantage of the invention is particularly apparent in a heavy electric vacuum cleaner such as an upright cleaner. For this reason, it is possible for even an old person, a woman, or a child to perform a cleaning operation using the electric vacuum cleaner, and to suppress fatigue even during a lengthy cleaning operation. In addition, regardless of age, sex or whether used at home or the office, it is possible to reduce the effort involved during a cleaning operation.
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Abstract
Provided are rotary brush unit which is disposed inside suction port portion and in which two rotary shaft bodies each having brush are disposed in series and driving motor which separately rotates each of the rotary shaft bodies. With such a configuration, since it is possible to change a self-propelling direction of the suction port portion to the left and right direction in addition to the forward direction, it is possible to remarkably reduce the effort involved in an operation of changing the direction of the suction port portion.
Description
- This application claims priority under 35 U.S.C. §119 to Japanese Patent Application No. JP2008-282714 filed on Nov. 4, 2008, the entire content of which is hereby incorporated by reference.
- The present invention relates to an electric vacuum cleaner having a suction port portion and a handle portion.
- In an existing electric vacuum cleaner, dust collecting performance using a sweeping-up rotary brush is good in regards to a floor surface and particularly a carpet surface. However, since the electric vacuum cleaner is equipped with a motor for driving the rotary brush, it is disadvantageous in that the suction port portion easily becomes heavy and the cleaning operation is wearisome. In order to solve the disadvantage, for example, Japanese Patent Unexamined Publication No. 2-7923 discloses a technology in which a suction port portion is provided with a self-propelling roller or a rotary brush itself is actively brought into contact with a floor surface so as to have a self-propelling property.
- However, in the above-described technology, it is possible to reduce the effort upon operating the suction port portion forward or backward, but it is necessary to change a direction of the suction port portion by twisting a wrist upon changing the direction in the left and right direction. For this reason, it is not possible to reduce the effort involved. Particularly, in an upright cleaner having a heavy suction port portion, it takes a good deal of effort to change the direction of the suction port portion. Since the direction of the suction port portion is frequently changed during an actual cleaning operation, particularly at this time, a large burden is applied to the wrist. As a result, the wrist feels fatigued after a long-time cleaning operation.
- An object of the invention is to provide an electric vacuum cleaner capable of changing a direction of a suction port portion to a desired changing direction and reducing the burden applied to a user's wrist.
- According to an aspect of the invention, there is provided an electric vacuum cleaner including: a cleaner body portion which has an electric blower for generating a suction wind; a suction port portion which sucks dust together with the suction wind; a handle portion which moves the suction port portion; a rotary brush unit which is disposed inside the suction port portion and in which two rotary shaft bodies each having a brush are disposed in series; a rotary brush unit driving portion which separately rotates each of the rotary shaft bodies; and a rotation speed difference generating mechanism which generates a difference in the rotation speed between two rotary shaft bodies.
- According to the invention, the rotary brush unit includes two rotary shaft bodies, and the rotation speed difference generating mechanism generates a difference in the rotation speed between two rotary shaft bodies. For this reason, it is possible to easily change the direction of the suction port portion to the desired changing direction. Accordingly, since it is possible to remarkably reduce a burden during a cleaning operation, it is possible to more comfortably perform the cleaning operation which is a comparatively heavy labor in the housework.
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FIG. 1 is an entire perspective view showing a cleaner body portion of an electric vacuum cleaner according to a first embodiment of the invention. -
FIG. 2 is a partially sectional view showing a suction port portion according to the embodiment. -
FIG. 3 is a block diagram showing a configuration of an electric controller according to the embodiment. -
FIG. 4 is an entire perspective view showing the cleaner body portion of the electric vacuum cleaner according to a second embodiment of the invention. -
FIG. 5 is a plan view showing a rotary brush unit of the electric vacuum cleaner according to a third embodiment of the invention. -
FIG. 6 is a plan view showing the rotary brush unit of the electric vacuum cleaner according to a fourth embodiment of the invention. -
FIG. 7 is a plan view showing the rotary brush unit of the electric vacuum cleaner according to a fifth embodiment of the invention. -
FIG. 8 is a plan view showing the rotary brush unit of the electric vacuum cleaner according to a sixth embodiment of the invention. -
FIG. 9 is a plan view showing the rotary brush unit of the electric vacuum cleaner according to a seventh embodiment of the invention. - Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying drawings. In addition, the invention is not limited to the embodiments.
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FIG. 1 is an entire perspective view showing a cleaner body portion of an electric vacuum cleaner according to a first embodiment of the invention.FIG. 2 is a partially sectional view showing a suction port portion according to the embodiment when seen from the bottom of the suction port portion. - As shown in
FIG. 1 , an electric vacuum cleaner according to this embodiment includessuction port portion 1 which sucks dust,handle portion 11 which movessuction port portion 1, andcleaner body portion 12 of which a lower portion is provided withsuction port portion 1 and an upper portion is provided withhandle portion 11.Cleaner body portion 12 includes an electric blower for generating a suction wind.Suction port portion 1 sucks dust together with the suction wind generated by the electric blower. Switchlever portion 10 is attached ontohandle portion 11. Switchlever portion 10 is attached to a position whereswitch lever portion 10 is operable by a finger whengripping handle portion 11 using a hand. Whenswitch lever portion 10 is pushed down in the left and right direction, as depicted by the arrow,suction port portion 1 is controlled so that the direction thereof is changed to the direction in whichswitch lever portion 10 is pushed down. - As shown in
FIG. 2 ,rotary brush unit 2 is disposed insidesuction port portion 1.Rotary brush unit 2 includes tworotary shaft bodies Brush 3 is disposed in surfaces ofrotary shaft bodies - In
FIG. 2 ,brush 3 is formed as a so-called bristle transplant brush in which bristles are tied and transplanted inside a hole, but may be formed as a brush in which a narrow raised fabric is inserted and fixed into an undercut groove or a bonded brush. - Each of the
rotary shaft bodies motor 4 and deceleratinggear 5. Drivingmotor 4 is connected to deceleratinggear 5 to thereby form a rotary brush unit driving portion. An output shaft of deceleratinggear 5 is fixed to each ofrotary shaft bodies motors 4 are driven,rotary shaft bodies - Likewise, a rotary mechanism is constituted by only
rotary brush unit 2 in such a manner that drivingmotor 4 and deceleratinggear 5 are disposed inside each ofrotary shaft bodies suction port portion 1. For this reason, it is possible to decrease the size ofsuction port portion 1. That is, it is possible to realizesuction port portion 1 which can move and turn slightly and has good operability orcleaner body portion 12 which is small in size and low in weight. - The length of
brush 3 is set to a length at whichbrush 3 slightly comes into contact with a floor surface. For this reason, whenrotary shaft bodies suction port portion 1 is pushed forward,suction port portion 1 propels itself, thereby improving the operability ofcleaner body portion 12. That is, when drivingmotors 4 insiderotary shaft bodies suction port portion 1 propels itself forward. - In addition, each of
rotary shaft bodies separate driving motor 4. For this reason, it is possible to independently change the rotation speeds thereof. When the right driving motor on the user side rotates faster than the left driving motor or only the right driving motor rotates, a direction ofsuction port portion 1 is changed to the left direction. On the other hand, when the left driving motor rotates faster than the right driving motor or only the left driving motor rotates, the direction ofsuction port portion 1 is changed to the right direction. - In addition, when the driving motor located in the desired rotation direction rotates in the reverse direction and the opposite driving motor rotates in the positive direction, it is possible to further strongly change the direction of
suction port portion 1. - Switch
lever portion 10controls driving motors 4 insiderotary shaft bodies FIG. 3 .FIG. 3 is a block diagram showing a circuit of the electric vacuum cleaner according to this embodiment. InFIG. 3 ,motor 35 for driving the electric blower generating the suction wind is connected in parallel toAC power source 36.Power switch portion 37 controlling an on-off state ofmotor 35 is disposed close to handleportion 11 of cleaner body portion 12 (not shown inFIG. 1 ). Drivingmotor 38A (one drivingmotor 4 shown inFIG. 2 ) for drivingrotary shaft body 2A is connected in series to rotary shaftbody switch portion 39A for controlling the on-off state of drivingmotor 38A. In the same manner, drivingmotor 38B (theother driving motor 4 shown inFIG. 2 ) for drivingrotary shaft body 2B is connected in series to rotary shaftbody switch portion 39B for controlling an on-off state of drivingmotor 38B. The two serial connection portions are connected in parallel tomotor 35. Rotary shaftbody switch portions switch lever portion 10. - In the normal state where no operation is performed,
switch lever portion 10 turns on rotary shaftbody switch portions motors suction port portion 1 propels itself forward. Whenswitch lever portion 10 is pushed down in the left and right direction, as described above,switch lever portion 10controls driving motors rotary shaft bodies suction port portion 1 is changed to the direction in which switchlever portion 10 is pushed down. - That is, when
switch lever portion 10 is pushed down in the right direction, only left drivingmotor 38B on the user side rotates in the positive direction. For this reason, it is possible to easily change the direction ofsuction port portion 1 to the right direction. At this time, whenswitch portion 39A ofrotary shaft body 2A andswitch portion 39B ofrotary shaft body 2B are interlocked with each other so that right drivingmotor 38A on the user side rotates in a direction opposite to the rotation direction of drivingmotor 38B, it is possible to more easily change the direction ofsuction port portion 1 to the right direction. In the same manner, whenswitch portion 39A ofrotary shaft body 2A andswitch portion 39B ofrotary shaft body 2B are interlocked with each other so that right drivingmotor 38A on the user side rotates slower than drivingmotor 38B, it is possible to more easily change the direction of suction port portion to the right direction. In any case, there is a difference in the rotation speed betweenrotary shaft bodies - On the contrary, in order to further change the direction of
suction port portion 1 to the left direction,switch portion 39A ofrotary shaft body 2A andswitch portion 39B ofrotary shaft body 2B are interlocked with each other as below.Switch portion 39A ofrotary shaft body 2A andswitch portion 39B ofrotary shaft body 2B are interlocked with each other so that only right drivingmotor 38A on the user side rotates in the positive direction, left drivingmotor 38B on the user side rotates in a direction opposite to the rotation direction of drivingmotor 38A, or left drivingmotor 38B on the user side rotates more slowly than drivingmotor 38A whenswitch lever portion 10 is pushed down in the left direction. - That is, in this embodiment, rotation speed difference generating mechanisms are separately disposed in each of
rotary shaft bodies motors body switch portions lever portion 10. - As described above, in this embodiment, the direction of
suction port portion 1 can be changed by generating a difference in the rotation speed between tworotary shaft bodies suction port portion 1 in the left and right direction. - In this embodiment,
suction port portion 1 propels itself in accordance with the rotation ofrotary shaft bodies suction port portion 1 propels itself forward or backward during a cleaning operation, it is possible to reduce the burden during the cleaning operation. - In this embodiment,
suction port portion 1 propels itself in accordance with the rotation ofrotary shaft bodies rotary shaft bodies suction port portion 1. - In this embodiment, driving
motor 4 is disposed inside each ofrotary shaft bodies suction port portion 1 and to easily handlesuction port portion 1 in a narrow space. In addition, it is possible to disposerotary brush unit 2 in substantially the entire width ofsuction port portion 1, and to improve a cleaning performance for cleaning a side wall. - In this embodiment, handle
portion 11 includesswitch lever portion 10 which is operable in the left and right direction, and the rotation of tworotary shaft bodies rotary brush unit 2 is controlled so that the direction ofsuction port portion 1 is changed to the direction in which switchlever portion 10 is operated. For this reason, it is possible to change the direction ofsuction port portion 1 just by using a finger tip without performing a large action in which handleportion 11 is twisted or pushed down. -
FIG. 4 is an entire perspective view showing the electric vacuum cleaner according to a second embodiment of the invention. This embodiment is different from the first embodiment in thatswitch lever portion 10 is not provided. Instead ofswitch lever portion 10,handle portion 11 which is twistable in the left and right direction is provided. The rotation speed of tworotary shaft bodies rotary brush unit 2 insidesuction port portion 1 is controlled through the electric controller (not shown) so that the direction ofsuction port portion 1 is changed to the twisting direction ofhandle portion 11. When the twisting amount becomes large, the difference in the rotation speed betweenrotary shaft bodies handle portion 11 is not twisted, suction port portion rotates forward. Since the other configurations are same as those of the first embodiment, detailed description thereof will be omitted. - As described above, in this embodiment, handle
portion 11 is twistable in the left and right direction. Whenhandle portion 11 is twisted in the left and right direction, the rotation of tworotary shaft bodies rotary brush unit 2 is controlled so that the direction ofsuction port portion 1 is changed to the twisting direction ofhandle portion 11. Accordingly, it is possible to change the self-propelling direction of the suction port portion while having the same feeling of operation as with a general cleaner having an oscillation mechanism. -
FIG. 5 is a plan view showingrotary brush unit 2 insidesuction port portion 1 of the electric vacuum cleaner according to a third embodiment of the invention.Rotary shaft bodies rotary brush unit 2 are rotatably connected to each other throughconnection portion 30.Connection portion 30 is formed as a simple bearing, and a difference in the rotation speed betweenrotary shaft bodies connection portion 30.Brush 3 is attached to surfaces ofrotary shaft bodies - Stiff brushes 3A depicted by the solid line are attached to
predetermined ranges 101 ofrotary brush unit 2.Soft brush 3B depicted by the dotted line is attached topredetermined ranges 102 at the center ofrotary brush unit 2. Since the other configurations are the same as those of the first embodiment, detailed description thereof will be omitted. - With such a configuration, since a large self-propelling force is generated at a position far from the turning center, it is possible to more efficiently turn
suction port portion 1. - In this embodiment, the direction of the suction port portion is changed by generating a difference in the rotation speed between the driving motors using
switch lever portion 10 of the first embodiment or handle portion 11B, which is twistable, of the second embodiment. At this time, in this embodiment, since thebrush 3 includesstiff brushes 3A in the vicinity of both ends ofrotary brush unit 2 andsoft brushes 3B in the vicinity of the center thereof, it is possible to more efficiently turnsuction port portion 1. - As described above, in this embodiment, the stiffness of each of the
brushes 3 in the vicinity of both ends ofrotary brush unit 2 is set to be larger than that in the vicinity of the center thereof. Accordingly, since it is possible to improve the direction changing force ofsuction port portion 1, it is possible to change the self-propelling direction even on a floor surface having a high resistance such as a deep carpet. -
FIG. 6 is a plan view showingrotary brush unit 2 insidesuction port portion 1 of the electric vacuum cleaner according to a fourth embodiment of the invention. Inrotary shaft bodies rotary brush unit 2, the outer diameter ofrange 110 in the vicinity of the center ofrotary brush unit 2 is small, and the outer diameter becomes large toward both ends. The length ofbrush 3 attached torotary shaft bodies rotary shaft bodies rotary shaft bodies brush 3 includesbrushes brush 3 up to the end of the bristle is substantially uniform throughout the entire width of therotary brush unit 2. Since the other configurations are same as those of the first embodiment, detailed description thereof will be omitted. - With such a configuration, since the brush is hardly pushed down due to the short length of the brush, it is possible to improve the self-propelling force at both ends of
rotary brush unit 2 even in the case of using a brush formed of the same material. That is, it is possible to more efficiently turnsuction port portion 1. - In this embodiment, the direction of the suction port portion is changed by generating a difference in the rotation speed between the driving motors using
switch lever portion 10 of the first embodiment or handle portion 11B, which is twistable, of the second embodiment. At this time, in this embodiment, sincebrush 3 includesbrushes rotary brush unit 2 to both ends thereof, it is possible to more efficiently turnsuction port portion 1. - As described above, in this embodiment, the outer diameter of each of
rotary shaft bodies rotary brush unit 2 is set to be larger than that in the vicinity of the center thereof. In addition, the length of each ofbrushes 3 in the vicinity of both ends ofrotary brush unit 2 is set to be shorter than that in the vicinity of the center thereof, and the outer diameter of each ofbrushes 3 up to the end of the bristle in the vicinity of both ends ofrotary brush unit 2 is set to be same as that in the vicinity of the center thereof. Accordingly, it is possible to improve the direction changing force ofsuction port portion 1, and to change the self-propelling direction even on a floor surface having a large sliding resistance such as a deep carpet. Further, since the outer diameter of each ofbrushes 3 up to the end of the bristle is set to be uniform, it is possible to have uniform contact with a floor surface. Accordingly, it is possible to obtain a uniform suction function and a uniform self-propelling function throughout the entire width ofrotary brush unit 2. -
FIG. 7 is a plan view showingrotary brush unit 2 insidesuction port portion 1 of the electric vacuum cleaner according to a fifth embodiment of the invention. Inbrush 3 attached to the surfaces ofrotary shaft bodies rotary brush unit 2, the length ofbrush 3 is short inrange 110 in the vicinity of the center ofrotary brush unit 2, and becomes longer toward both ends. The outer diameter ofbrush 3 up to the end of the bristle is depicted by one-dot chain line P2. That is,brush 3 includesbrushes rotary shaft bodies rotary brush unit 2 to both ends thereof. Since the other configurations are same as those of the first embodiment, detailed description thereof will be omitted. - With such a configuration,
brush 3 at both ends ofrotary brush unit 2 strongly comes into contact with the floor surface to thereby generate a large self-propelling force. As a result, it is possible to more efficiently turnsuction port portion 1. - In this embodiment, the direction of the suction port portion can be changed by generating a difference in the rotation speed between the driving motors using
switch lever portion 10 of the first embodiment or handle portion 11B, which is twistable, of the second embodiment. At this time, in this embodiment, sincebrush 3 includesbrushes rotary brush unit 2 to both ends thereof, it is possible to more efficiently turnsuction port portion 1. - As described above, in this embodiment, the length of each of
brushes 3 in the vicinity of both ends ofrotary brush unit 2 is set to be longer than that in the vicinity of the center thereof. Accordingly, since it is possible to improve the direction changing force ofsuction port portion 1, it is possible to change the self-propelling direction even on a floor surface having a large resistance such as a deep carpet. Further, since the distance from the center of the attachment portion ofbrush 3 is uniform, it is possible to easily perform a transplanting operation using an automatic machine. -
FIG. 8 is a plan view showingrotary brush unit 2 insidesuction port portion 1 of the electric vacuum cleaner according to a sixth embodiment of the invention. In the same manner as the above-described embodiments,brush 3 is attached to the surfaces ofrotary shaft bodies rotary brush unit 2. The pitch betweenbrushes 3 attached topredetermined ranges 120 of both ends ofrotary brush unit 2 is narrow. The pitch atpredetermined range 121 in the vicinity of the center ofrotary brush unit 2 is wide. That is,brush 3 includes high-density brush 3G attached to both ends ofrotary brush unit 2 and low-density brush 3H attached to the vicinity of the center thereof. Since the other configurations are same as those of the first embodiment, detailed description thereof will be omitted. - Accordingly, it is possible to generate a large self-propelling force at both ends of
rotary brush unit 2. For this reason, it is possible to more efficiently turnsuction port portion 1. - In this embodiment, the direction of the suction port portion is changed by generating a difference in the rotation speed between the driving motors using
switch lever portion 10 of the first embodiment or handle portion 11B, which is twistable, of the second embodiment. At this time, in this embodiment, sincebrush 3 includes high-density brush 3G attached to both ends ofrotary brush unit 2 and low-density brush 3H attached to the vicinity of the center thereof, it is possible to more efficiently turnsuction port portion 1. - As described above, in this embodiment, the density of each of
brushes 3 in the vicinity of both ends ofrotary brush unit 2 is set to be higher than that in the vicinity of the center thereof. Particularly,brush 3 of each ofrotary shaft bodies brushes 3 in the vicinity of both ends ofrotary brush unit 2 is set to be denser than that of each ofbrushes 3 in the vicinity of the center thereof. Accordingly, since it is possible to improve the direction changing force ofsuction port portion 1, it is possible to change the self-propelling direction even on a floor surface having a high resistance such as a deep carpet. In addition, since it is possible to make the type, stiffness, and length of the bristles ofbrush 3 uniform throughout the entire width ofbrush unit 2, it is possible to improve the productivity. -
FIG. 9 is a plan view showingrotary brush unit 2 insidesuction port portion 1 of the electric vacuum cleaner according to a seventh embodiment of the invention. In the same manner as the above-described embodiments,brush 3 is attached to the surfaces ofrotary shaft bodies rotary brush unit 2. In brushes 3, four lines of brushes 3I are respectively attached topredetermined ranges 130 of both ends ofrotary brush unit 2. Two lines ofbrushes 3J are attached to range 131 in the vicinity of the center ofrotary brush unit 2. Since the other configurations are same as those of the first embodiment, detailed description thereof will be omitted. - Accordingly, it is possible to generate a large self-propelling force at both ends of
rotary brush unit 2. For this reason, it is possible to more efficiently turnsuction port portion 1. - In this embodiment, the direction of the suction port portion is changed by generating a difference in the rotation speed between the driving motors using
switch lever portion 10 of the first embodiment or handle portion 11B, which is twistable, of the second embodiment. At this time, in this embodiment, sincebrush 3 includes four lines of brushes 3I in both ends ofrotary brush unit 2 and two lines ofbrushes 3J in the vicinity of the center thereof, it is possible to more efficiently turnsuction port portion 1. - As described above, brushes 3 of
rotary shaft bodies brushes 3 in the vicinity of both ends ofrotary brush unit 2 is larger than that ofbrushes 3 in the vicinity of the center thereof. Accordingly, since it is possible to improve the direction changing force ofsuction port portion 1, it is possible to change the self-propelling direction even on a floor surface having a high resistance such as a deep carpet. In addition, since it is possible to make the type, stiffness, length, and transplanting pitch of the bristles ofbrush 3 uniform throughout the entire width ofbrush unit 2, it is possible to improve the productivity. - As described above, the electric vacuum cleaner according to the invention includes the cleaner body portion which has the electric blower for generating a suction wind; the suction port portion which sucks dust together with the suction wind; the handle portion which moves the suction port portion; the rotary brush unit which is disposed inside the suction port portion and in which two rotary shaft bodies each having a brush are disposed in series; the rotary brush unit driving portion which separately rotates each of the rotary shaft bodies; and the rotation speed difference generating mechanism which generates a difference in the rotation speed between two rotary shaft bodies.
- With such a configuration, it is possible to reduce the burden applied to the arm or wrist upon changing the direction of suction port portion in the left and right direction.
- In the invention, the suction port portion propels itself in accordance with the rotation of the rotary shaft bodies. With such a configuration, since the suction port portion propels itself forward or backward during the cleaning operation, it is possible to reduce the burden applied to the arm or wrist.
- In the invention, the rotary brush unit driving portion is configured as the driving motor disposed inside each of the rotary shaft bodies. With such a configuration, it is possible to decrease the size of the suction port portion and to easily handle the suction port portion in a narrow space. In addition, it is possible to dispose the rotary brush unit in substantially the entire width of the suction port portion, and to improve the cleaning performance for cleaning a side wall.
- In the invention, the handle portion includes the switch lever portion which is operable in the left and right direction, and controls the rotation of two rotary shaft bodies of the rotary brush unit so that the direction of the suction port portion is changed to the operation direction of the switch lever portion. With such a configuration, it is possible to change the direction of the suction port portion just by using a finger tip without performing a large action in which the handle portion is twisted or pushed down.
- In the invention, the handle portion is twistable in the left and right direction. When the handle portion is twisted in the left and right direction, the rotation of two rotary shaft bodies of the rotary brush unit is controlled so that the direction of the suction port portion is changed to the twisting direction of the handle portion. With such a configuration, it is possible to change the self-propelling direction of the suction port portion while having the same feeling of operation as with a general cleaner having an oscillation mechanism.
- In the invention, the stiffness of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be larger than that in the vicinity of the center thereof. With such a configuration, since it is possible to improve the direction changing force of the suction port portion, it is possible to change the self-propelling direction even on a floor surface having a high resistance such as a deep carpet.
- In the invention, the outer diameter of each of the rotary shaft bodies in the vicinity of both ends of the rotary brush unit is set to be larger than that in the vicinity of the center thereof. In addition, the length of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be shorter than that in the vicinity of the center thereof, and the outer diameter of each of the brushes up to the end of the bristle in the vicinity of both ends of the rotary brush unit is set to be same as that in the vicinity of the center thereof
- With such a configuration, it is possible to improve the direction changing force of the suction port portion, and to change the self-propelling direction even on a floor surface having a large sliding resistance such as a deep carpet. Further, since the outer diameter of the brush up to the end of the bristle is set to be uniform, it is possible to have uniform contact with a floor surface. Accordingly, it is possible to obtain a uniform suction function and a uniform self-propelling function throughout the entire width of the rotary brush unit.
- In the invention, the length of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be longer than that in the vicinity of the center thereof With such a configuration, since it is possible to improve the direction changing force of the suction port portion, it is possible to change the self-propelling direction even on a floor surface having a large resistance such as a deep carpet. Further, since the distance from the center of the attachment portion of the brush is uniform, it is possible to easily perform a transplanting operation using an automatic machine.
- In the invention, the density of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be higher than that in the vicinity of the center thereof With such a configuration, since it is possible to improve the direction changing force of the suction port portion, it is possible to change the self-propelling direction even on a floor surface having a high resistance such as a deep carpet. In addition, since it is possible to make the type, stiffness, and length of the bristles of the brush uniform throughout the entire width of the brush unit, it is possible to improve the productivity.
- In the invention, the brushes of each of the rotary shaft bodies are formed with a comb tooth shape, and the pitch of the comb tooth shape of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be denser than that in the vicinity of the center thereof.
- With such a configuration, since it is possible to improve the direction changing force of the suction port portion, it is possible to change the self-propelling direction even on a floor surface having a high resistance such as a deep carpet. In addition, since it is possible to make the type, stiffness, and length of the bristles of the brush uniform throughout the entire width of the brush unit, it is possible to improve the productivity.
- In the invention, the brush of the rotary shaft body is formed in a stripe shape, and the number of lines of the brushes in the vicinity of both ends of the rotary brush unit is set to be larger than that in the vicinity of the center thereof.
- With such a configuration, since it is possible to improve the direction changing force of the suction port portion, it is possible to change the self-propelling direction even on a floor surface having a high resistance such as a deep carpet. In addition, since it is possible to make the type, stiffness, and length of the bristles of the brush uniform throughout the entire width of the brush unit, it is possible to improve the productivity.
- As described above, the advantage of the invention is particularly apparent in a heavy electric vacuum cleaner such as an upright cleaner. For this reason, it is possible for even an old person, a woman, or a child to perform a cleaning operation using the electric vacuum cleaner, and to suppress fatigue even during a lengthy cleaning operation. In addition, regardless of age, sex or whether used at home or the office, it is possible to reduce the effort involved during a cleaning operation.
Claims (11)
1. An electric vacuum cleaner comprising:
a cleaner body portion which has an electric blower for generating a suction wind;
a suction port portion which sucks dust together with the suction wind;
a handle portion which moves the suction port portion;
a rotary brush unit which is disposed inside the suction port portion and in which two rotary shaft bodies each having a brush are disposed in series;
a rotary brush unit driving portion which separately rotates each of the rotary shaft bodies; and
a rotation speed difference generating mechanism which generates a difference in the rotation speed between the two rotary shaft bodies.
2. The electric vacuum cleaner of claim 1 ,
wherein the suction port portion propels itself in accordance with the rotation of the rotary shaft bodies.
3. The electric vacuum cleaner of claim 1 ,
wherein the rotary brush unit driving portion is configured as a driving motor which is disposed inside each of the rotary shaft bodies.
4. The electric vacuum cleaner of claim 1 ,
wherein the handle portion includes a switch lever portion which is operable in the left and right direction, and controls the rotation of the two rotary shaft bodies of the rotary brush unit so that a direction of the suction port portion is changed to the operation direction of the switch lever portion.
5. The electric vacuum cleaner of claim 1 ,
wherein the handle portion is twistable in the left and right direction, and
wherein when the handle portion is twisted in the left and right direction, the rotation of the two rotary shaft bodies of the rotary brush unit is controlled so that a direction of the suction port portion is changed to the twisting direction of the handle portion.
6. The electric vacuum cleaner of claim 1 ,
wherein stiffness of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be harder than that in the vicinity of the center thereof.
7. The electric vacuum cleaner of claim 1 ,
wherein an outer diameter of each of the rotary shaft bodies at both ends of the rotary brush unit is set to be larger than that in the vicinity of the center,
wherein a length of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be shorter than that in the vicinity of the center thereof, and
wherein an outer diameter of each of the brushes up to the end of its bristles in the vicinity of both ends of the rotary brush unit is set to be same as that in the vicinity of the center thereof
8. The electric vacuum cleaner of claim 1 ,
wherein a length of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be longer than that in the vicinity of the center thereof.
9. The electric vacuum cleaner of claim 1 ,
wherein a density of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be higher than that in the vicinity of the center thereof.
10. The electric vacuum cleaner of claim 9 ,
wherein the brushes of the rotary shaft bodies are formed in a comb tooth shape, and a pitch of the comb tooth shape of each of the brushes in the vicinity of both ends of the rotary brush unit is set to be narrower than that in the vicinity of the center thereof.
11. The electric vacuum cleaner of claim 9 ,
wherein the brushes of the rotary shaft bodies are formed in a stripe shape, and the number of lines of the brushes in the vicinity of both ends of the rotary brush unit is set to be larger than that in the vicinity of the center thereof.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008282714A JP2010110344A (en) | 2008-11-04 | 2008-11-04 | Electric vacuum cleaner |
JP2008-282714 | 2008-11-04 |
Publications (1)
Publication Number | Publication Date |
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US20100107357A1 true US20100107357A1 (en) | 2010-05-06 |
Family
ID=42129675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/611,544 Abandoned US20100107357A1 (en) | 2008-11-04 | 2009-11-03 | Electric vacuum cleaner |
Country Status (2)
Country | Link |
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US (1) | US20100107357A1 (en) |
JP (1) | JP2010110344A (en) |
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US10213077B2 (en) | 2014-03-19 | 2019-02-26 | Dyson Technology Limited | Cleaner head |
GB2573587A (en) * | 2018-05-11 | 2019-11-13 | Hizero Tech Co Ltd | Cleaning robot |
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US10555650B2 (en) | 2014-03-19 | 2020-02-11 | Dyson Technology Limited | Cleaner appliance |
US20210137329A1 (en) * | 2017-12-12 | 2021-05-13 | Dyson Technology Limited | Cleaner head for a vacuum cleaner |
CN112932325A (en) * | 2021-02-25 | 2021-06-11 | 江苏美的清洁电器股份有限公司 | Round brush and have its cleaning device |
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US20230284848A1 (en) * | 2022-02-03 | 2023-09-14 | Black & Decker, Inc. | Vacuum Cleaner and Cleaning Accessory for a Vacuum Cleaner |
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US10512384B2 (en) | 2016-12-15 | 2019-12-24 | Irobot Corporation | Cleaning roller for cleaning robots |
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JPWO2018225173A1 (en) * | 2017-06-07 | 2019-11-07 | 学校法人千葉工業大学 | Electric vacuum cleaner |
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JP7486181B2 (en) | 2020-09-29 | 2024-05-17 | パナソニックIpマネジメント株式会社 | Vacuum cleaner |
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JP7499193B2 (en) | 2021-01-14 | 2024-06-13 | シャープ株式会社 | Vacuum cleaner |
-
2008
- 2008-11-04 JP JP2008282714A patent/JP2010110344A/en active Pending
-
2009
- 2009-11-03 US US12/611,544 patent/US20100107357A1/en not_active Abandoned
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US10213077B2 (en) | 2014-03-19 | 2019-02-26 | Dyson Technology Limited | Cleaner head |
US10555650B2 (en) | 2014-03-19 | 2020-02-11 | Dyson Technology Limited | Cleaner appliance |
US20210137329A1 (en) * | 2017-12-12 | 2021-05-13 | Dyson Technology Limited | Cleaner head for a vacuum cleaner |
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CN112932325A (en) * | 2021-02-25 | 2021-06-11 | 江苏美的清洁电器股份有限公司 | Round brush and have its cleaning device |
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US20230284848A1 (en) * | 2022-02-03 | 2023-09-14 | Black & Decker, Inc. | Vacuum Cleaner and Cleaning Accessory for a Vacuum Cleaner |
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AS | Assignment |
Owner name: PANASONIC CORPORATION,JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ODACHI, TORU;KIKKAWA, TATSUO;REEL/FRAME:023776/0373 Effective date: 20090730 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |