JP2012147818A - Suction device for vacuum cleaner, and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction device for a vacuum cleaner that achieves a constantly stable and high dust collection performance.SOLUTION: The suction device includes: a rotating brush 31 having an aperture (not shown) in the bottom surface thereof, and arranged to be vertically movable; a motor 33 for driving and rotating the brush 31; a mover 65 for moving the rotating brush 31 vertically; a controller 66 for controlling the motor 33 and the mover 65; a floor detector 63 for detecting the surface of a floor; and a current detector 64 for detecting a load imposed on the rotating brush 31. The controller 66 varies a movement amount of the rotating brush 31 so that the load becomes a predetermined value set in advance according to a floor surface, and controls the mover 65 to move the rotating brush 31 vertically so that the load becomes most suitable for the floor surface, thus achieving a high dust collection performance. In addition, the rotating brush 31 is controlled to move vertically so that the same amount of load is achieved even when the cleaning segments (not shown) of the rotating brush 31 are worn out, thus achieving a stable dust collecting, wiping and polishing performance.

Description

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

  A conventional vacuum cleaner suction tool includes a rotating brush that is driven to rotate by an electric motor or the like, and the cleaning brush provided in the longitudinal direction of the outer periphery of the rotating brush sweeps up dust on the surface to be cleaned. Also, to prevent overcurrent of the motor, and to remove the dust on the cleaning surface by the cleaning piece of the rotating brush and to prevent unevenness in wiping and polishing, the rotating brush can be moved up and down with a spring etc. One that makes the load from the floor constant is proposed (see, for example, Patent Documents 1 and 2).

JP-A-2-77220 JP 2008-104627 A

  However, in the configuration of the conventional vacuum cleaner as described above, since it is an urging means such as a spring, the setting of the spring is adjusted to the load such as the wooden floor in order to keep the load constant regardless of the floor surface. When the carpet is cleaned, the load applied by the rotating brush against the floor surface is small, and the dust collection performance due to the lifting is reduced. In addition, when the load of the carpet is adjusted, when cleaning on a wooden floor, etc., the load that the rotating brush presses against the floor is large, the operation performance is reduced, and the rotating brush cleaning piece is heavily worn. There were problems such as becoming.

  In addition, when the cleaning piece of the rotating brush has been worn for a long time and the wear of the rotating brush has progressed, the spring is extended from the initial stage, so the urging force to press against the floor surface becomes small, and when the cleaning piece is worn There were problems such as removal of dust on the cleaning surface and wiping / polishing performance deteriorated compared to the initial stage. Furthermore, even when the cleaning piece of the rotating brush is worn out and the cleaning performance is deteriorated, there is a problem that the user performs the cleaning without noticing and the leftover occurs.

  This invention solves the said conventional subject, Comprising: It aims at providing the suction tool for vacuum cleaners which was excellent in the dust removal performance, and a vacuum cleaner.

  In order to solve the above-described conventional problems, a vacuum cleaner of the present invention includes a rotating brush having an opening on a lower surface and arranged to be movable up and down, an electric motor that rotationally drives the rotating brush, and the rotating brush. A moving means for moving in the vertical direction; a control means for controlling the electric motor and the moving means; a floor surface detecting means for detecting a floor surface; and a load detecting means for detecting a load applied to the rotating brush, The control means changes the amount of movement of the rotating brush so as to have a preset load according to the floor surface, detects the floor surface, and is in an optimal load state according to the floor surface. By moving the rotating brush up and down with the moving means, high dust collection performance on all floor surfaces can be achieved, and the rotating brush can be placed in the same load state when the cleaning piece of the rotating brush is worn. To move up and down, Boss was removed and wiping, polishing performance of the dust can be realized. In addition, since the load state can be set according to each floor surface, the load can be set lightly on a wooden floor or the like, so that the power consumption of the motor can be suppressed and energy saving can be realized.

  Moreover, the vacuum cleaner of this invention has the vacuum cleaner main body which incorporates the suction tool for vacuum cleaners in any one of Claims 1-5, and the electrically-driven blower which generates suction | inhalation wind, Dust By using the vacuum cleaner suction tool excellent in removal performance, a vacuum cleaner excellent in operability and cleaning performance can be provided.

  The suction tool for a vacuum cleaner and the vacuum cleaner according to the present invention can set the load of the rotary brush according to the floor surface, and thus rotate efficiently on all floor surfaces and have excellent dust removal performance.

Whole perspective view of the vacuum cleaner which connected the suction tool for vacuum cleaners in Embodiment 1 of this invention External perspective view of the vacuum cleaner suction tool Top view when removing the upper case of the vacuum cleaner suction tool Back view of the vacuum cleaner suction tool Cross-sectional view of the vacuum cleaner suction tool Control system block diagram of suction tool for the vacuum cleaner The top view when the upper case of the suction tool for vacuum cleaners in Embodiment 2 of this invention is removed Control system block diagram of suction tool for the vacuum cleaner

  According to a first aspect of the present invention, there is provided a rotary brush having an opening on a lower surface and arranged to be movable up and down, an electric motor that rotationally drives the rotary brush, a moving means that moves the rotary brush in the vertical direction, the electric motor, A control unit that controls the moving unit; a floor surface detection unit that detects a floor surface; and a load detection unit that detects a load applied to the rotating brush. The control unit is preset according to the floor surface. The amount of movement of the rotating brush is changed so that the load is applied. The floor surface is detected, and the rotating brush is moved up and down by the moving means so as to obtain an optimum load state according to the floor surface. Therefore, it is possible to achieve high dust collection performance on all floors and to move the rotating brush up and down so that the same load is applied even when the cleaning piece of the rotating brush is worn.・ Realized polishing performance Kill. In addition, since the load state can be set according to each floor surface, the load can be set lightly on a wooden floor or the like, so that the power consumption of the motor can be suppressed and energy saving can be realized.

  In the second invention, in particular, the load detection means of the first invention is constituted by current detection means for detecting a current flowing through the motor, and the current value of the motor is preset according to the floor surface. By moving the rotating brush up and down so that the value becomes high, high dust collection performance on all floor surfaces can be achieved, and the rotating brush is moved up and down so that the same current value is obtained even when the cleaning piece of the rotating brush is worn. Because it moves, stable dust removal and wiping / polishing performance can be realized.

  In the third invention, in particular, the load detection means of the first invention is constituted by a rotation speed detection means for detecting the rotation speed of the electric motor, and the rotation speed of the rotary brush or the electric motor is preset according to the floor surface. By moving the rotating brush up and down to achieve the same number of rotations, high dust collection performance on all floors can be realized, and also when the cleaning piece of the rotating brush is worn, the same number of rotations can be achieved. Since the rotating brush moves up and down, stable dust removal, wiping and polishing performance can be realized.

According to a fourth aspect of the invention, in particular, the vacuum cleaner suction device according to any one of the first to third aspects of the invention comprises a notification means, and the control means is more than a reference value in which the amount of movement of the rotating brush is set in advance. When the notification means, when the rotating brush cleaning piece is worn out and the dust collecting ability is reduced, the user is notified, by prompting the replacement of the rotating brush, The occurrence of leftovers can be suppressed.

  In the fifth invention, in particular, the control means according to any one of the first to fourth inventions stops the operation of the electric motor when the amount of movement of the rotating brush exceeds a preset reference value. Thus, the cleaning piece of the rotating brush is worn, and the floor surface can be prevented from being damaged by the shortened cleaning piece.

  A vacuum cleaner according to a sixth aspect of the present invention has a vacuum cleaner suction tool according to any one of claims 1 to 5 and a vacuum cleaner main body incorporating an electric blower that generates suction air. By using a vacuum cleaner suction tool with excellent dust removal performance, a vacuum cleaner with excellent operability and cleaning performance can be provided.

  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)
The suction tool for vacuum cleaners in Embodiment 1 of this invention is demonstrated using FIGS. FIG. 1 is an overall perspective view of a vacuum cleaner to which a vacuum cleaner suction tool according to the present embodiment is connected.

  In FIG. 1, an electric blower chamber 3 containing an electric blower 2 is arranged at the rear part of the cleaner body 1, and a dust collection bag (not shown) for collecting sucked dust is detachable at the front part. A dust collection chamber 4 that is housed and communicated with the suction side of the electric blower 2 is disposed, and a pair of traveling wheels 6 are rotatably attached to both sides of the lower rear part, and the traveling front is also provided at the front of the bottom surface. A caster 7 is attached. A connection pipe 9 provided at one end of the hose 8 is detachably connected to the front portion of the vacuum cleaner main body 1 and an intake port 10 communicating with the dust collecting chamber 4 is provided.

  The other end of the hose 8 is provided with a tip pipe 12 having a handle 11 having an operation portion 11a for gripping during cleaning and operating the operation of the cleaner body 1. The end of the tip pipe 12 is connected to a downstream end of an extendable or jointable extension pipe 13, and the other end of the extension pipe 13 is connected to the vacuum cleaner suction tool 16 (hereinafter referred to as the vacuum cleaner suction tool 16). A "suction tool 16" is detachably connected.

  The bumper 7 is made of an elastic material and extends from the front part of the vacuum cleaner body 1 to both sides. When the vacuum cleaner body 1 travels, even if the cleaner body 1 collides with furniture, pillars, or the like, the bumper 7 is damaged. It is something to prevent. A main body handle 18 that is gripped when the cleaner body 1 is carried is rotatably provided on the upper portion of the cleaner body 1. The suction tool 16 includes an electric motor 33 and a rotating brush 31 that is driven to rotate by the electric motor 33.

  Next, the detailed structure of the suction tool 16 in this Embodiment is demonstrated using FIGS. 2 is an external perspective view of the suction tool 16, FIG. 3 is a plan view when the upper case of the suction tool 16 is removed, FIG. 4 is a rear view of the suction tool 16, and FIG. 5 is a cross-section of the suction tool 16. FIG.

  2-5, the outer shell 20 of the suction tool 16 is comprised from the upper case 20a and the lower case 20b which has the opening 21 in the bottom face, and when outer periphery consists of elastic materials, such as urethane, when it hits furniture etc. A nozzle bumper 22 is provided to reduce the impact. A connecting pipe 23 detachably connected to the distal end of the extension pipe 13 is attached to the rear center portion of the suction tool 16 so as to be tiltable.

  A pair of traveling front wheels 24 is attached to the vicinity of both front side ends of the back surface of the lower case 20b, and a pair of traveling rear wheels 25 are also rotatably attached to both rear side ends.

  A rotary brush chamber 27 communicating with the opening 21 and the connecting pipe 23 is disposed at the front portion of the suction tool 16, and a rotary brush 31 is rotatably provided in the rotary brush chamber 27. The electric motor 33 serves as a drive source for rotationally driving the rotating brush 31 in the normal rotation direction, that is, the direction in which the suction tool 16 is advanced, and includes a shaft 33 a of the electric motor 33 and a pulley 31 a fixed to the end of the rotating brush 31. The power of the electric motor 33 is transmitted to the rotary brush 31 through a drive belt 34 stretched between the two.

  The rotating brush 31 has a plurality of groove portions 31b in the outer peripheral longitudinal direction, a core 31c having a pulley 31a at one end, a bristle brush or the like, one end is mounted on the groove portion 31b, and dust on the surface to be cleaned at the other end. It is comprised from the cleaning piece 31d which is swept up. Reference numeral 35 denotes a support plate that rotatably supports at least two portions of the shaft 31e of the rotary brush 31. The support plate 35 is provided with a plurality of irregularities 35a, and a stepping motor or the like is provided via a gear 36. Connected to the moving means 65.

  Next, the control system of the suction tool 16 according to the first embodiment will be described with reference to FIG.

  In FIG. 6, the motor power source 61 for operating the motor 33 is ON / OFF controlled by the control circuit of the cleaner body 1. The DC power supply means 62 is created from the electric motor power supply 61 and serves as a power supply for a floor surface detection means 63, a current detection means 64, a control means 66, and a movement means 65, which will be described later.

  The floor surface detection means 63 is a means for detecting the unevenness of the floor surface by an infrared light receiving and emitting element to determine the cleaning floor surface, and the current detection means 64 is a means for detecting the current value of the electric motor 33, depending on the floor surface. This is load detecting means for detecting a load applied to the rotating brush 31. The moving means 65 moves the rotary brush 31 up and down, and determines the amount of movement by the rotation of the stepping motor.

  The control means 66 is constituted by a microcomputer or the like, and transmits a signal to the moving means 65 by a signal from the floor surface detecting means 63 or the current detecting means 64 to vary the vertical movement amount of the rotating brush 31. 67 is an informing means for informing the user of the life of the rotating brush 31 and is controlled by the control means 66.

  The operation and action of the vacuum cleaner suction tool according to the present embodiment configured as described above are as follows. When starting to use the vacuum cleaner, the user inserts a power plug (not shown) of the vacuum cleaner main body 1 into an outlet provided on the wall of the room and operates the operation operation portion 11a to operate the vacuum cleaner. When started, the electric blower 2 and the electric motor 33 of the suction tool 16 are operated. When the electric motor 33 rotates, the power of the electric motor 33 is transmitted to the rotating brush 31 and the rotating brush 31 rotates.

  In the suction tool 16, a control circuit 38 is fixed to the lower case 20b. Here, the motor power supply 61 for operating the electric motor 33 is converted into a DC power supply 62 and supplied as a power supply for each operation. .

When the user reciprocates the suction tool 16 for cleaning, the floor surface detection means 63 has a large unevenness if the floor surface is a carpet, a small unevenness on a wooden floor, etc., and an uneven surface surface. Detect and output the degree of unevenness to the control means 66. The control means 66 receives the output, determines the floor surface, and changes the current value of the electric motor 33 according to the floor surface.

  The current of the electric motor 33 is recognized by the control means 66 by the current detection means 64, and the control means 66 outputs the current to the moving means 65 so as to have a preset current value, thereby moving the rotary brush 31 up and down. . Assuming that the preset current value is A for wooden floors and B for carpets, B> A is set. This is because the cleaning with the carpet collects the dust by the scraping force of the cleaning piece 31d, and therefore it is necessary to make the load larger than the wooden floor or the like.

  The rotation direction of the rotating brush 31 is the forward rotation direction, and the current value of the signal of the current detection means 64 changes because the load received from the floor surface differs depending on whether the user is pushing or pulling the suction tool 16. The control means 66 determines the movement amount so that the maximum current for a predetermined time becomes constant. Here, it is needless to say that the accuracy of current detection is improved by using the acceleration sensor to detect whether the user is pushing or pulling and judging the current when the load is large.

  Next, the operation when the cleaning piece 31d of the rotating brush 31 is worn during cleaning will be described. When the cleaning piece 31d is worn, the load received from the floor surface is reduced, so that the current value is smaller than A set in advance. However, the control means 66 detects that the current value has decreased, and the control means 66 determines the current value. It outputs to the moving means 65 so that it may become A, and it operates it so that the rotating brush 31 may approach the floor surface.

  The moving amount L of the rotating brush 31 that approaches the floor surface is set to a distance at which the cleaning piece 31d of the rotating brush 31 is in contact with the wooden floor and the wiping and polishing performance can be maintained, and when the moving amount L is exceeded, The control means 66 returns the rotating brush 31 to the initial position, stops the operation of the electric motor 33, and notifies the notifying means 67 to inform the user that the cleaning piece 31d of the rotating brush 31 has reached the end of its life. .

  As described above, according to the first embodiment, the rotating brush 31 is moved by the moving unit 65 so that the floor surface is detected by the floor surface detecting unit 63 and an optimum load state is obtained according to the floor surface. By moving up and down, the rotating brush 31 efficiently rotates on all floor surfaces, and the dust removal performance is improved. Further, since the rotary brush 31 is moved closer to the floor surface so that the same load state is obtained even when the cleaning piece 31d of the rotary brush 31 is worn, the cleaning piece 31d comes into contact with the floor surface with a constant load and is stable. The removal of dust, wiping and polishing performance can be realized.

  When the preset movement amount L is exceeded, the rotating brush 31 is returned to the initial position, the operation of the electric motor 33 is stopped, and the notification means 67 notifies that the cleaning piece 31d of the rotating brush 31 is worn. If the dust collection capability is reduced, it is possible to suppress the occurrence of leftovers by prompting the replacement of the rotating brush 31. In addition, by returning the rotating brush 31 to the initial position and stopping the operation of the electric motor 33, it is possible to suppress the floor surface from being damaged by the cleaning piece 31d that is shortened due to wear of the cleaning piece 31d of the rotating brush 31.

(Embodiment 2)
A vacuum cleaner suction tool according to Embodiment 2 of the present invention will be described with reference to FIGS. FIG. 7 is a plan view of the vacuum cleaner suction tool when the upper case is removed, and FIG. 8 is a control system block diagram of the vacuum cleaner suction tool. In addition, the same code | symbol is provided to the same part as the vacuum cleaner suction tool in the said Embodiment 1, and the description is abbreviate | omitted.

In FIG. 7, a rotating body 41 to which a magnet 40 is fixed is fixed to the shaft 33 a of the electric motor 33 of the suction tool 16 in the present embodiment, and is rotated by the rotation of the electric motor 33. A Hall IC 42 that outputs a signal that is turned on when the magnet 40 comes close to the rotating body 41 and that turns off when the magnet 40 is turned away from the rotating body 41 is disposed and connected to the control circuit 38.

  Next, the control system of the suction tool 16 according to the second embodiment will be described with reference to FIG. In FIG. 8, the rotation speed detection means 68 is composed of the magnet 40 and the Hall IC 42 and detects the rotation speed of the electric motor 33. The signal from the rotation speed detection means 68 is input to the control means 66. It has become. Since the rotation speed of the electric motor 33 changes depending on the load applied to the rotary brush 31 from the floor surface, in the present embodiment, the rotation speed detection means 68 serves as a load detection means for detecting the load applied to the rotary brush 31. is there.

  The operation and action of the vacuum cleaner suction tool of the second embodiment configured as described above are as follows. When the user performs the reciprocating operation of the suction tool 16 for cleaning, the floor surface detection means 63 has a large unevenness in the case of a carpet and a small unevenness in a wooden floor or the like, and detects the unevenness in the floor surface. The degree of unevenness is output to the control means 66. The control means 66 receives the output, judges the floor surface, and changes the rotation speed of the electric motor 33 according to the floor surface.

  The rotation of the electric motor 33 can be recognized by the control means 66 by the rotation speed detection means 68, and the control means 66 outputs the rotation brush 31 in the up and down direction so as to output to the moving means 65 so that the rotation speed is set in advance. Let The rotation direction of the rotary brush 31 is a normal rotation direction, and the signal received from the rotation speed detection means 68 varies depending on the load received from the floor surface depending on whether the user is pushing or pulling the suction tool 16. . The control means 66 determines the movement amount so that the minimum number of rotations for a predetermined time is constant. Needless to say, if the acceleration sensor is used to detect whether the user is pushing or pulling and judging based on the rotation speed when the load is large, the rotation speed detection accuracy is improved.

  As described above, according to the present embodiment, the floor brush is moved up and down by the moving unit 65 so that the floor surface detecting unit 63 detects the floor surface and an optimum load state is obtained according to the floor surface. By moving, the rotating brush 31 efficiently rotates on all floor surfaces, and the dust removal performance is improved.

  As described above, the vacuum cleaner suction tool according to the present invention has excellent dust removal performance by rotating the rotating brush under the optimum load state corresponding to all floor surfaces by the moving means. It can be widely applied to household, commercial and store vacuum cleaners.

16 Vacuum cleaner suction tool (suction tool)
31 Rotating brush 33 Electric motor 63 Floor surface detection means 64 Current detection means (load detection means)
65 Moving means 66 Control means 67 Notification means 68 Rotational speed detection means (load detection means)

Claims (6)

A rotary brush having an opening on the lower surface and arranged to be movable up and down, an electric motor that rotationally drives the rotary brush, a moving means that moves the rotary brush in the vertical direction, and controls the electric motor and the moving means Control means, floor surface detection means for detecting a floor surface, and load detection means for detecting a load applied to the rotating brush, wherein the control means becomes a load set in advance according to the floor surface. Furthermore, the vacuum cleaner suction tool which changes the movement amount of the said rotating brush. The vacuum cleaner suction tool according to claim 1, wherein the load detection means is configured by current detection means for detecting a current flowing through the electric motor. The vacuum cleaner suction tool according to claim 1, wherein the load detection means is constituted by a rotation speed detection means for detecting the rotation speed of the electric motor. 4. The electric device according to claim 1, further comprising a notification unit, wherein the control unit performs notification by the notification unit when the amount of movement of the rotating brush exceeds a preset reference value. Vacuum cleaner suction tool. The vacuum cleaner suction tool according to any one of claims 1 to 4, wherein the control means stops the operation of the electric motor when the amount of movement of the rotating brush becomes equal to or greater than a preset reference value. The vacuum cleaner which has the vacuum cleaner main body which incorporates the suction tool for vacuum cleaners in any one of Claims 1-5, and the electric blower which generates a suction | inhalation wind.