JP2009136371A - Suction tool for vacuum cleaner and vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction tool of a vacuum cleaner which can unerringly rotate a rotary brush even on a fluffy surface to be cleaned such as a carpet, can show a good dusting property, and is easy to use. <P>SOLUTION: The suction tool comprises a floor nozzle pipe 9 communicating with a rotary brush storage chamber 4 to which the rotary brush 3 scraping up dust is rotatably attached and connected to an extension pipe (not illustrated), a revolutions detection means (not illustrated) to detect the revolutions of the rotary brush 3, and a driving motor 25 rotationally driving the rotary brush 3 through a one-way clutch (not illustrated). The rotary brush storage chamber 4 forms a dust suction port 7 provided in the position facing a floor surface, and an air inflow opening (not illustrated) to suck air to rotate the rotary brush 3 and controls the rotary brush 3 so as to attain prescribed revolutions or to be in a prescribed range by the driving motor 25 through the one-way clutch when the revolutions detected by the revolutions detection means reach the prescribed revolutions or are in the prescribed range. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vacuum cleaner suction tool and a vacuum cleaner using the same.

Conventionally, as shown in FIG. 8, this type of vacuum cleaner suction tool includes a rotary brush storage portion 44 that stores a rotatable rotary brush 43 that scrapes up dust on the floor, and a front side of the rotary brush storage portion 44. The air flow path 41 provided in the air flow path 41 is provided, and the air sucked from the air flow path 41 is applied to the blade 42 of the rotation brush 43 to rotate the rotation brush 43 and collect dust on the floor surface. (For example, refer to Patent Document 1).
JP-A-11-123165

  However, in the configuration of the conventional vacuum cleaner suction tool, when cleaning a flat surface to be cleaned such as a wooden floor, the surface to be cleaned and the rotating brush 43 are kept at a certain distance. Therefore, the load applied to the rotating brush 43 is suppressed, and the rotating brush 43 can rotate. However, when cleaning a fuzzy surface to be cleaned such as a carpet, the rotating brush 43 bites into the hair of the carpet and rotates. The brush 43 sometimes did not rotate.

  If the wind speed is simply increased to increase the rotational force of the rotating brush 43, the wind noise will increase, and depending on the situation, part of the suction air may pass above the rotating brush 43 and move in the reverse rotation direction. It has been confirmed that there is a flow and that the air flow carrying the dust on the surface to be cleaned is reduced.

  For this reason, conventionally, in order to create an airflow in the obliquely downward direction, measures have been taken such as inclining the air passage 41 obliquely downward, but this reduces the area of the air inlet 41a and increases the wind speed. The wind noise was high.

  The present invention solves the above-described conventional problems. On a flat surface to be cleaned such as a wooden floor surface, while maintaining the conventional dust removal and operability, the surface to be cleaned such as a carpet is fuzzy. It is an object of the present invention to provide an easy-to-use vacuum cleaner suction tool and a vacuum cleaner that can reliably rotate the rotating brush and exhibit excellent dust removal.

  In order to solve the above-described conventional problems, a vacuum cleaner suction tool according to the present invention includes a rotary brush storage chamber in which a rotary brush for scraping dust is rotatably attached, a communication with the rotary brush storage chamber, and cleaning. A rotary nozzle comprising a Yuka nozzle pipe connected to a connection part with the machine body, a rotation speed detection means for detecting the rotation speed of the rotary brush, and a drive motor for rotating the rotary brush via a clutch means; The brush storage chamber has a dust collection inlet provided at a position facing the floor and an air inflow port for sucking air for rotating the rotary brush, and is detected by the rotation speed detecting means. The rotating brush is controlled by the drive motor so as to have a predetermined rotational speed or range via the clutch means when the rotated rotational speed reaches a predetermined rotational speed or range. Such as for example, when load on the rotary brush is light scraping dust from a cleaning surface by high speed rotation of the rotary brush by suction air. In addition, on the surface to be cleaned, such as a carpet, the load on the rotating brush becomes heavy and the rotational speed decreases. In that case, the rotational speed of the rotating brush is detected by the rotational speed detecting means, and when the rotational speed drops below a predetermined value, power is supplied to the drive motor and the rotating brush is powerfully rotated by the power via the clutch means to scrape dust. To do. In this way, the rotating brush is normally rotated by suction air, and when the load becomes heavy, the rotating brush is driven by the drive motor, so the load on the driving motor is reduced and the drive motor itself is small and lightweight. In addition, it is possible to provide an easy-to-use vacuum cleaner suction tool capable of obtaining high performance on any floor surface.

  Moreover, the vacuum cleaner of this invention is equipped with the suction tool for vacuum cleaners described in any one of Claims 1-5 while having a built-in electric blower, and exhibits an excellent dust removal performance. can do.

  INDUSTRIAL APPLICABILITY The vacuum cleaner suction tool and vacuum cleaner of the present invention are small and lightweight, and can exhibit excellent dust removal performance.

  The first invention is a rotary brush storage chamber rotatably mounted with a rotary brush that sweeps up dust, a yuka nozzle pipe that communicates with the rotary brush storage chamber and is connected to a connection part with the cleaner body, A rotation number detecting means for detecting the rotation number of the rotating brush; and a drive motor for rotating the rotating brush via a clutch means, wherein the rotating brush storage chamber is provided at a position facing the floor surface. A dust inlet and an air inlet for sucking in air for rotating the rotary brush, and the number of revolutions detected by the revolution number detection means falls within a predetermined number or range In addition, the rotary brush is controlled by the drive motor through the clutch means so as to have a predetermined rotation speed or range, and when the load on the rotary brush such as a wooden floor is light, the suction wind More rotary brush rotated at high speed scrape the dust from a cleaning surface. In addition, on the surface to be cleaned, such as a carpet, the load on the rotating brush becomes heavy and the rotational speed decreases. In that case, the rotational speed of the rotary brush is detected by the rotational speed detection means, and when the rotational speed drops below a predetermined value, power is supplied to the drive motor and the rotary brush is powerfully rotated by the power via the clutch means to scrape dust. To do. In this way, the rotating brush is normally rotated by suction air, and when the load becomes heavy, the rotating brush is driven by the drive motor, so the load on the driving motor is reduced and the drive motor itself is small and lightweight. In addition, it is possible to provide an easy-to-use vacuum cleaner suction tool capable of obtaining high performance on any floor surface.

  In the second invention, in particular, the drive motor of the first invention is constituted by a DC magnet motor or a DC brushless motor. Usually, when the rotating brush is rotated by suction air and the load becomes heavy. Since the rotary brush is driven by the drive motor, the burden on the drive motor itself is reduced, and a highly efficient small motor such as a DC magnet motor can be mounted. Further, by adopting a low-voltage DC brushless motor, it is possible to reduce the size and weight with high efficiency, long life, and high durability.

  The third invention, in particular, comprises the first or second rotational speed detection means with a magnet incorporated on the rotating brush side and a magnetic detection element that detects a change in the amount of magnetic flux of the magnet accompanying rotation, Compared to optical elements and mechanical rotation speed detection, dust-proof measures are simplified and high reliability is obtained. In addition, the suction element itself can be reduced in size and weight by the magnetic detection element.

  In the fourth invention, in particular, when the rotation speed detected by the rotation speed detection means according to any one of the first to third inventions is less than or equal to a predetermined value or stopped for a predetermined time, Control means for limiting is provided, and when the rotating brush is locked by a carpet, cloth, waste paper, or the like, power to the drive motor is cut off and the drive motor itself is protected. Further, even when a human finger or the like bites into the rotating brush portion, it operates so as to stop the rotation of the immediately rotating brush, ensuring safety.

  The fifth aspect of the invention is particularly provided with notifying means for notifying when the rotary brush is driven by the drive motor via the clutch means of any one of the first to fourth aspects of the invention. Since the load state of the surface can be informed to the user, the user can adjust the pressure on the vacuum cleaner suction tool according to the load on the floor surface, and an appropriate operational feeling can be obtained.

  6th invention is equipped with the suction tool for vacuum cleaners described in any one of Claims 1-5 while incorporating an electric blower, and can exhibit the outstanding dust removal performance. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
Hereinafter, the vacuum cleaner suction tool in Embodiment 1 of this invention is demonstrated using FIGS.

  1 is a cross-sectional view of a vacuum cleaner suction tool according to the present embodiment, FIG. 2 is a top view of the vacuum cleaner suction tool, and FIG. 3 is an enlarged cross-sectional view of the vacuum cleaner suction tool. FIG. 4 is a partial cross-sectional view of the vacuum cleaner suction tool, FIG. 5 is a plan view of a rotating brush of the vacuum cleaner suction tool, and FIG. 6 is an electric vacuum cleaner connected to the vacuum cleaner suction tool. FIG. 7 is an overall view of the machine, and FIG. 7 is an explanatory diagram of the rotational speed control operation of the rotary brush of the vacuum cleaner suction tool.

  1 to 7, reference numeral 1 denotes a vacuum cleaner suction tool (hereinafter referred to as “suction tool 1”) according to the present embodiment. The rotary brush 3 in which the brushes 2 are arranged is rotatable to the rotary brush storage chamber 4. Is deployed. The rotary brush storage chamber 4 is formed with a cross section having substantially the same diameter as the rotary brush 3, and a suction port 7 is provided at the bottom. 9 is a Yuka nozzle pipe for connecting to the extension pipe 10 which is one of the connecting parts to the vacuum cleaner. The Yuka nozzle pipe communicates with the rotating brush storage chamber 4, and the dust sucked from the suction port 7 is Yuka. It passes through the nozzle pipe 9 and is sucked into the cleaner body 8 through the extension pipe 10 and the hose 11.

  The yuka nozzle pipe 9 and the rotating brush storage chamber 4 are connected so as to be rotatable in the vertical direction, and 12 indicates the center of rotation (note that the connecting portion of the yuka nozzle pipe 9 and the rotating brush storage chamber 4 is Since the specific configuration is the same as that of the conventional vacuum cleaner suction tool, the description is omitted).

  An air inflow port 14 for taking in suction air different from the suction port 7 is formed in the lower front part of the rotating brush storage chamber 4, and air for rotating the rotating brush 3 is taken in.

  The opening area of the air inlet 14 is set so that about 30% of the suction air volume of the vacuum cleaner body 8 can be sucked on a flat floor surface, and 50 to 70% even when the suction port 7 is blocked. The pressure loss is suppressed to such an extent that the air volume is sucked. Two air inlets 14 are formed near the front center of the rotating brush storage chamber 4 so that the suction air strikes the vicinity of the center of the rotating brush 3.

  Reference numeral 16 denotes a traveling roller that is rotatably arranged before and after the suction tool 1, and maintains the distance from the floor so that the tip of the brush 2 of the rotating brush 3 protrudes 1 mm from the bottom of the suction tool 1. .

  Reference numeral 17 denotes a protruding portion formed in front of the rotating brush storage chamber 4, which serves as a reinforcing material that receives an impact when it hits a wall, and has a roller 16 disposed in a freely rotating manner attached thereto.

  An upper air inlet 18 that opens upward is formed on the upper surface of the protruding portion 17, and a front air inlet 19 that opens forward is formed on the front surface of the protruding portion 17. The air inlet 14 communicates with the air inlet 14.

  More specifically, the upper air intake 18 is positioned higher than the air inlet 14 and is formed in a direction substantially orthogonal to the air inlet 14. On the other hand, the front air intake 19 is located at a position facing the air inlet 14 and is opened in a direction substantially orthogonal to the upper air intake 18.

  A flat plate 20 is formed below the upper air intake 18, and the downstream side of the flat plate 20 reaches the air inlet 14 of the rotary brush storage chamber 4, and from the upper air intake 18 and the front air intake 19. The entered air is guided to the air inlet 14.

  A first shaft 5 and a second shaft 6 are provided at both ends of the rotating brush 3 and are covered with a first protective cylinder 21 and a second protective cylinder 22, respectively.

  A one-way clutch 23 as a clutch means is used for a bearing component that receives the first shaft 5 of the rotating brush 3. Since the outer ring of the one-way clutch 23 is fixed to the large gear 24, the large gear 24 and the one-way clutch 23 rotate in the same direction.

  Reference numeral 26 denotes a small gear attached to the drive motor 25, which meshes with the large gear 24, and each gear shaft (the rotation shaft 27 of the large gear 24 and the motor shaft 28 of the small gear 26) is attached to the attachment plate 29. By being rotatably attached while maintaining the pitch, the rotational force of the drive motor 25 is amplified and transmitted to the one-way clutch 23.

  In FIG. 4, since the one-way clutch 23 is general, the description of the configuration is omitted. However, when the outer ring 23a stops and the first shaft 5 rotates in the forward direction, the inner roller 23b moves to the outer ring cam. Apart from the surface 23c, the first shaft 5 idles with respect to the outer ring 23a. When the outer ring 23a rotates in the forward direction faster than the rotation of the first shaft 5, the first shaft 5 rotates in the reverse direction relative to the outer ring 23a, and the inner roller 23b moves to the outer ring cam surface 23c. The first shaft 5 and the outer ring 23a are fixed by the wedge action by moving to the meshing position.

  In the present embodiment, the rotary brush 3 employs a small one-way clutch 23 configured such that the forward rotation is in a free state and the rotational force is transmitted to the rotary brush 3 when the drive motor 25 rotates. ing.

  Reference numeral 30 denotes a motor chamber that covers the drive motor 25, and reference numeral 31 denotes a bearing body that covers the first protective cylinder 21 of the rotary brush 3, and when the heavy load is applied in the radial direction of the rotary brush 3 due to an impact or the like, the one-way clutch 23 This serves to receive the first protective cylinder 21 so that excessive weight does not concentrate on the dust, and prevents dust from entering the one-way clutch 23 portion.

  Reference numeral 32 denotes a detachable lid provided at the other end, and a resin bearing 33 integrally holding the second shaft 6 of the rotating brush 3 is formed integrally at the center, and opens and closes the lid 32. Thus, the rotary brush 3 can be attached and detached.

  Reference numeral 34 denotes a wiring for supplying power to the drive motor 25, but since there are many examples of existing products for specific routing, description thereof will be omitted.

  Operation | movement of the suction tool 1 in this Embodiment comprised as mentioned above is demonstrated below.

  When the suction tool 1 is placed on a flat surface to be cleaned such as a wooden floor, air is sucked from the suction port 7, the air inlet 14, and the rear groove 15 by the suction force of the cleaner body 8. About 70% of the suction air volume of the cleaner body 8 is sucked from the suction port 7, about 25% is sucked from the air inlet 14, and about 5% is sucked from the groove 15.

  Since the rotary brush 3 is in a free state with respect to the forward rotation, the air sucked from the air inlet 14 rotates the rotary brush 3. Then, it exerts an effect of scraping off the dust on the floor surface, and collects dust on the floor surface in combination with the suction air from the suction port 7.

  At this time, the air entering the air inlet 14 becomes a downwardly flowing airflow because the vertical airflow entering from the upper air inlet 18 and the horizontal airflow entering from the front air inlet 19 collide with each other. Enter storage room 4. Therefore, wind hits the outer diameter side of the rotating brush 3, and a high torque torque is exhibited.

  On the other hand, when cleaning a fuzzy surface to be cleaned such as a carpet, the amount of air sucked from the suction port 7 is reduced, and air exceeding 50% of the amount of air sucked from the cleaner main body 8 from the air inlet 14 at the front part. Will be aspirated.

  Therefore, the force for rotating the rotating brush 3 with the suction air is doubled, and the rotating brush 3 can be rotated even on a floor surface with a large load such as a carpet.

  Furthermore, since the air that has entered from the front air inlet 14 rotates the rotating brush 3 and raises the dust on the surface to be cleaned and transports it to the Yuka nozzle pipe 9 side, the air volume from the suction port 7 is reduced by half. The dust removal performance will not drop.

  However, in the case of a long-legged carpet or a foot-wiping mat made of a soft material whose surface to be cleaned is lifted by a suction force, the contact resistance with respect to the rotating brush 3 is increased, and the rotating brush 3 has a rotational force due to the wind speed. Can no longer rotate.

  In that case, the drive motor 25 is started and the rotational force of the drive motor 25 is transmitted to the rotary brush 3 to rotate the rotary brush 3 and collect dust.

  When the rotating brush 3 rotates, the air flow described above is formed, so that the rotational force due to the wind speed and the force that lifts the dust act, and even if the driving force of the driving motor 25 is low, excellent dust removal performance is ensured. be able to.

  In this way, normally, the structure is such that dust is collected by utilizing the force of the air to be sucked and the rotation is assisted by the driving force of the driving motor 25 at a location where the rotational resistance of the surface to be cleaned is large. Can select a small motor that has lower rotational force than the conventional one and does not require a long service life. Therefore, the suction tool itself can be made smaller and lighter, and the operability is excellent. The suction tool 1 can be provided.

  In FIG. 7, the suction tool 1 includes a rotation speed detection means 42 that detects the rotation speed of the rotary brush 3, and the rotation speed detection means 42 includes a magnet 35 attached to the rotation brush 3, and a magnet 35 associated with the rotation. The Hall IC 36 is configured as a magnetic detection element that detects a change in magnetic flux. The output of the Hall IC 36 is connected to a microcomputer 39 via an amplifier 37 and an A / D converter 38.

  A power MOSFET 40 is connected to the output of the microcomputer 39 so that the drive motor 25 is PWM-controlled.

  Here, when the rotation speed of the rotary brush 3 falls below the set rotation speed N1, the microcomputer 39 controls the rotation speed to increase to the set rotation speed N1 (sections A and B in FIG. 4).

  In the present embodiment, the drive motor 25 is constituted by a direct current magnet motor or a direct current brushless motor, and an alternating magnetic field such as an alternating current motor is not generated, so that high efficiency can be achieved and a low voltage motor can be used to reduce the insulation distance. It can be set and can be reduced in size and weight. Further, when the rotary brush 3 is in an overload or locked state, the microcomputer 39 does not receive a rotation speed synchronization signal, and detects that and operates to cut off the power of the drive motor 25. .

  In the above embodiment, the brush 2 is arranged on the rotating brush 3, but a belt-like blade may be used instead of the brush.

  Further, instead of the Hall IC 36 as a magnetic detection element, an MR element or a Hall element may be used.

  Further, if a control means for cutting off or limiting the power to the drive motor 25 is provided when the rotation speed detected by the rotation speed detection means 42 is less than or equal to a predetermined value for a predetermined time, the rotary brush 3 is When the locked state is caused by carpets, cloth, large paper scraps, etc., the power to the drive motor 25 is cut off and the drive motor 25 itself is protected. Further, even when a human finger or the like bites into the rotating brush 3 portion, it operates to stop the rotation of the rotating brush 3 immediately, and safety is ensured.

  Further, when the rotating brush 3 is driven by the drive motor 25 via the one-way clutch 23, if a notification means (not shown) for notifying the fact is provided, the load state of the surface to be cleaned is notified to the user. Therefore, the user can adjust the pressure on the suction tool 1 in accordance with the load on the floor, and an appropriate operational feeling can be obtained.

  As described above, the suction tool for a vacuum cleaner and the vacuum cleaner according to the present invention are extremely useful because they are small and light and can take out dust firmly and are easy to use.

Sectional drawing of the vacuum cleaner suction tool in Embodiment 1 of this invention Top view of the vacuum cleaner suction tool Partial enlarged sectional view of the vacuum cleaner suction tool (A)-(c) The partial expanded sectional view of the suction tool for vacuum cleaners Top view of the rotating brush of the vacuum cleaner suction tool Overall view of the vacuum cleaner connected with the vacuum cleaner suction tool Rotational speed control operation explanatory diagram of the vacuum cleaner suction tool Front enlarged sectional view of a conventional vacuum cleaner suction tool

Explanation of symbols

1 Vacuum cleaner suction tool (suction tool)
2 Brush 3 Rotating Brush 4 Rotating Brush Storage Room 7 Suction Port 8 Vacuum Cleaner Body 9 Yuka Nozzle Pipe 10 Extension Pipe (Connecting Parts)
11 Hose (connecting parts)
DESCRIPTION OF SYMBOLS 12 Rotation center 14 Air inflow port 16 Roller 17 Protrusion part 18 Upper air intake port 19 Front air intake port 20 Flat plate 23 One-way clutch (clutch means)
25 Drive motor 35 Magnet 36 Hall IC (Magnetic sensing element)
37 Amplifier 38 A / D Converter 39 Microcomputer 40 Power MOSFET
42 Rotational speed detection means

Claims (6)

A rotating brush storage chamber in which a rotating brush for scraping dust is rotatably attached, a yuka nozzle pipe that communicates with the rotating brush storage chamber and is connected to a connection part to the cleaner body, and the rotational speed of the rotating brush And a drive motor that rotationally drives the rotary brush via a clutch means, and the rotary brush storage chamber has a dust collection inlet provided at a position facing the floor surface. An air inflow port for sucking air for rotating the rotating brush, and the clutch means when the rotational speed detected by the rotational speed detecting means falls within a predetermined rotational speed or range. A suction tool for a vacuum cleaner that controls the rotary brush so as to have a predetermined rotation speed or range via the drive motor. The suction tool for a vacuum cleaner according to claim 1, wherein the drive motor is constituted by a DC magnet motor or a DC brushless motor. The suction tool for a vacuum cleaner according to claim 1 or 2, wherein the rotational speed detection means is composed of a magnet incorporated on the rotating brush side and a magnetic detection element for detecting a change in the amount of magnetic flux of the magnet accompanying rotation. The control means which interrupts | blocks or restrict | limits the electric power to a drive motor when the rotation speed detected by the rotation speed detection means is less than predetermined for a predetermined time or stops is provided. Vacuum cleaner suction tool. The suction tool for a vacuum cleaner according to any one of claims 1 to 4, further comprising a notification means for notifying the rotary brush when the rotary brush is driven by the drive motor via the clutch means. The vacuum cleaner provided with the suction tool for vacuum cleaners described in any one of Claims 1-5 while incorporating an electric blower.

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