JP6668192B2 - Suction body of vacuum cleaner and vacuum cleaner having the same - Google Patents

Description

  The present invention relates to a mouthpiece of a vacuum cleaner and a vacuum cleaner having the same.

Japanese Patent Application Laid-Open No. 2000-037327 (Patent Document 1) is a background art of this technical field. In this publication, a brush chamber that rotatably accommodates a brush that sweeps up dust on a surface to be cleaned and an intake chamber in which a suction force acts are provided in a floor nozzle cover, and between the brush chamber and the intake chamber. A floor nozzle for a vacuum cleaner in which a partition is provided and a gap is provided between a lower end of the partition and a surface to be cleaned is described.
Japanese Patent No. 04904228 (Patent Document 2) discloses a horizontally long brush chamber which is opened toward a floor below and stores a horizontally long rotating brush, and an intake chamber provided in parallel with the brush chamber. An intake port connected to the intake chamber and opening parallel to the intake chamber toward the floor; and a partition separating the brush chamber and the intake chamber. An enlarged intake chamber parallel to the intake chamber is formed on the upper side of the brush chamber and on the side opposite to the floor surface, the partition having a substantially U-shaped cross section facing the floor. A suction nozzle of a vacuum cleaner in which an intake chamber is formed integrally with the enlarged intake chamber is described.

JP 2000-037327 A Patent No. 04904228

However, in the suction port body described in Patent Literature 1, although the suction force increases, the flow velocity of the air in the suction port increases, and the noise may increase.
In addition, the suction port body described in Patent Document 2 has an enlarged suction chamber at the upper part of the brush chamber, so that the dust scraped up by the brush falls again into the brush chamber due to gravity and is sucked into the connection pipe. There is a possibility that it will be difficult to be done. This phenomenon appears remarkably near both ends of the suction port body having a weak suction force.

  SUMMARY OF THE INVENTION An object of the present invention is to improve the dust collecting performance, suppress an increase in noise, prevent excessive sticking of a suction body to a floor surface, and provide a vacuum cleaner with good operability and a operable vacuum cleaner. To provide a vacuum cleaner.

A rotary brush which is rotated by the electric motor, and the rotating brush detachable brush chamber, a suction port having an opening in a cleaning surface located in parallel with said brush chamber, between said brush chamber and the suction opening a first gas-tight seal means positioned, a second gas-tight seal means on the rear of the front Symbol suction port, an intake port for communicating the inside and outside suction body top, and the first gas-tight seal means and the A plurality of nozzle openings are provided between the second airtightness holding means from the intake port to the opening, and the area of the nozzle opening is closer to the vicinity of the center in the rotation axis direction of the rotating brush, It is characterized in that it is smaller than the area closer to both ends .

According to the present invention, it is possible to reduce the difference between the negative pressure of the suction port near the center of the rotating brush (gauge pressure, which is lower than the atmospheric pressure) and the negative pressure of the suction port near both ends of the rotating brush. Further, the negative pressure can be increased (the absolute value can be increased) by the first airtightness maintaining means and the second airtightness maintaining means, so that the dust collecting performance can be improved.
Further, since the local turbulence of the air is suppressed, the noise can be reduced.
Further, it is possible to prevent the suction body from sticking excessively to the floor surface, and to provide a suction body with good operability.

It is an external appearance perspective view showing the whole vacuum cleaner concerning the present invention. It is a top view of the mouthpiece concerning this invention. It is a bottom view of the mouthpiece concerning the present invention. It is a side view of the mouthpiece concerning the present invention. It is a top view in the state where the upper part of the mouthpiece concerning the present invention was removed. It is BB sectional drawing at the time of advance of the suction body of FIG. It is BB sectional drawing at the time of retreat of the mouthpiece of FIG. It is CC sectional drawing of the suction body of FIG. It is AA sectional drawing of the suction body shown in FIG. It is EE sectional drawing of the suction body of FIG. FIG. 5 is a bottom perspective view of the mouthpiece shown in FIG. 4. It is DD sectional drawing of the suction body shown in FIG.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

  FIG. 1 shows an external view of a vacuum cleaner according to an embodiment of the present invention. The vacuum cleaner 1 includes a vacuum cleaner main body 2, an operation tube 4 connected to the hose portion 3 and provided with a hand operation switch SW, and the like, an extension tube 5 provided to be extendable and contractible, and a mouthpiece 6. ing.

  The cleaner body 2 includes an electric blower 2a that generates a suction force, a dust collection unit 2b that stores dust collected by the suction force of the electric blower 2a, and the like. In this embodiment, a so-called cyclone-type vacuum cleaner is described as an example, but the present invention may be applied to a so-called paper-pack type vacuum cleaner.

  One end of the hose portion 3 is connected to a connection port 2c of the cleaner main body 2 so as to communicate with the dust collector 2b of the cleaner main body 2. Further, the other end of the hose portion 3 is connected to one end of the operation tube 4.

  The operation tube 4 includes a handle 4 a having a hand operation switch SW and the like, a power supply terminal (not shown) supplied with power from the cleaner body 2, and the like. A power supply terminal (not shown) provided at one end of the extension tube 5 is connected to the power supply terminal.

  By operating the hand-operated switch SW of the operation pipe 4, it is possible to operate and stop the electric blower 2a, switch between high and low, and operate and stop the electric motor 40 (see FIG. 4) provided on the suction body 6. ing.

  The extension pipe 5 includes an outer pipe 5a and an inner pipe 5b. One end of the inner pipe 5b is inserted into the other end of the outer pipe 5a, and is provided inside the outer pipe 5a and the inner pipe 5b (not shown). The air passages are connected so as to communicate with each other, and are configured to extend and contract. FIG. 1 illustrates a state where the extension pipe 5 is shortest.

  FIG. 2 is a top view of the mouthpiece.

  As shown in FIG. 2, the mouthpiece 6 includes a mouthpiece case 10 having a substantially T-shape in a top view, and a mouthpiece joint 13 connected to the mouthpiece case 10.

The mouthpiece case 10 includes a mouthpiece body 11 that is elongated in the left-right direction (width direction) when viewed from above, and a connecting portion 12 that is connected to a mouthpiece joint 13 at a central portion of the mouthpiece body 11 in the left-right direction. . The connecting portion 12 is formed with a flow path R (see FIG. 3) that allows the suction body 11 and the suction joint 13 to communicate with each other.
The mouthpiece body 11 is provided with a bumper 11a from the front end face to the left and right side faces. The bumper 11a is formed of an elastic material such as rubber or an elastomer, and secures airtightness in the suction main body 11 at the time of use, and the suction main body 11 collides with furniture or the like at the time of using the vacuum cleaner 1 (see FIG. 1). In this case, it plays a role of a cushioning material for preventing the furniture and the like from being damaged and absorbing the shock to the suction opening main body 11.
The suction joint 13 includes a first connecting portion 14 rotatably connected to the connecting portion 12, and a second connecting portion 15 rotatably connected to the first connecting portion 14. I have.
The first connecting portion 14 has a substantially semi-track shape when viewed from above in FIG. 2, and has a cylindrical shaft 14 a connected to the connecting portion 12. The axial direction of the shaft 14a is the left-right direction of the mouthpiece main body 11, and both ends of the shaft 14a are supported by bearings 12g (see FIG. 5) formed on the connecting portion 12. The first connecting portion 14 is configured to be rotatable (vertically) from a state substantially parallel to a surface to be cleaned (cleaning surface) M (see FIG. 4) to a state substantially perpendicular to the surface M (see FIG. 4). I have. That is, by rotating the first connecting portion 14 with respect to the suction case 10 about the shaft 14a as a fulcrum, the extension pipe 5 (see FIG. 1) is substantially in a state substantially parallel to the cleaning surface M (see FIG. 4). It can be rotated between the vertical state.

  The second connecting portion 15 is configured to be rotatable with respect to the first connecting portion 14 in the left-right direction of the mouth body 11 (clockwise direction and counterclockwise direction in FIG. 2). Thus, for example, the extension pipe 5 can be tilted from a state where the extension pipe 5 is substantially perpendicular to the surface M to be cleaned to a state substantially parallel to the surface M to be cleaned.

  The second connecting portion 15 is provided with a power supply terminal 15a for supplying power. In the electric vacuum cleaner 1 of this embodiment (see FIG. 1), the electric power to be supplied to the suction body 6 is configured to be supplied from the cleaner main body 2 through the hose 3, the operation pipe 4, and the extension pipe 5. I have. FIG. 3 is a bottom view of the mouthpiece. FIG. 4 is a side view of the mouthpiece.

  As shown in FIGS. 3 and 4, the mouthpiece 6 includes a first rotating cleaning body (rotating brush) 20 and a second rotating cleaning body 30. In the suction case 10 (suction main body 11), a brush chamber Q having an opening on a lower surface (a surface facing the cleaning surface) and a pressure equalizing chamber P having an opening (suction port) on the lower surface are formed. I have.

The first rotary cleaning body 20 is disposed on the front side in the front-rear direction along the left-right direction of the suction main body 11 and is rotatably supported in the brush chamber Q. Further, the first rotary cleaning body 20 is provided continuously from one end side to the other end side in the left-right direction (the axial direction of the first rotary cleaning body 20) of the mouthpiece main body 11.
The first rotary cleaning body 20 includes a plurality of types of brushes 20a, 20b, and 20c such as brushes having different hardnesses, and the brushes 20a, 20b, and 20c are spirally arranged. In the present embodiment, the case where three types of brushes 20a, 20b, and 20c are provided has been described as an example. However, the present invention is not limited to this. The configuration described above may be added, and a configuration in which a blade member made of an elastic material such as rubber is spirally arranged between the spirally arranged brushes may be added, and may be appropriately changed.
The second rotating cleaning body 30 has a diameter smaller than the diameter of the first rotating cleaning body 20, is covered by a brush body, and is arranged rearward and parallel to the first rotating cleaning body 20. Further, the second rotary cleaning body 30 is provided continuously from one end side in the left-right direction of the suction opening main body 11 to the other end side in parallel with the axial direction of the first rotary cleaning body 20.

  The second rotary cleaning body 30 has a shaft 30a (axis) parallel to the rotation shaft 21 of the first rotary cleaning body 20, and the shaft 30a is rotatably supported by the suction case 10 (suction body 11). Have been. The second rotary cleaning body 30 is not driven by the electric motor, but is configured to rotate by the frictional force with the surface M to be cleaned (see FIG. 4) when the suction body 6 is moved. It is. As described above, since the second rotary cleaning body 30 is supported by the suction body 11 via the shaft portion 30a, the configuration of the second rotary cleaning body 30 can be simplified.

  The mouthpiece 6 includes a brush drive switch 16, wheels 17, and bearing holding members 31 and 32 on the lower surface of the connecting portion 12 of the mouthpiece case 10.

  The brush drive switch 16 is a switch that detects whether or not the lower surface of the mouthpiece 6 is in contact with the surface to be cleaned M (cleaning surface), and is configured together with the wheels 16a. The wheel 16a is provided so that a part thereof always projects from the lower surface of the suction case 10 (the connecting portion 12) by a biasing means such as a spring. When it is detected that the wheel 16a jumps out of the suction case 10 and is not in contact with the surface M to be cleaned, the electric motor 40 (see FIG. 5) is driven by the control of the circuit board 50 (control board) (see FIG. 5). Is stopped, and the rotation of the first rotary cleaning body 20 is stopped. Further, when it is detected that the wheel 16a is pushed in and is in contact with the surface M to be cleaned, the electric motor 40 is driven by the control of the circuit board 50, and the first rotary cleaning body 20 rotates.

  The wheel 17 receives the stress of the forward and backward movement and the rotation operation operated by the operation pipe 4 and brings the bottom surface of the suction body 6 into close contact with the surface to be cleaned (cleaning surface), thereby improving the operation performance of the suction body 6. have.

  The bearing holding member 31 supports the rotating shaft of the first rotating cleaning body 20 and one end of the shaft portion 30a of the second rotating cleaning body 30, and is fixed to the suction case 10 using screws.

  The bearing holding member 32 supports the rotating shaft of the first rotating cleaning body 20 and the other end of the shaft portion 30a of the second rotating cleaning body 30. The bearing holding member 32 is detachably secured to the suction case 10 by a lock mechanism (see FIG. (Not shown).

  FIG. 5 is a top view in a state where the upper part of the mouthpiece case 10 of the mouthpiece is removed.

  As shown in FIG. 5, the suction body 6 includes an electric motor 40 that drives the first rotary cleaning body 20 above the first rotary cleaning body 20 (see FIG. 3) and the second rotary cleaning body 30 (see FIG. 3). And a circuit board 50 for controlling the electric motor 40.

  The electric motor 40 is attached to one end of the mouth body 11 in the left-right direction. The electric motor 40 has an output shaft arranged in parallel with the left-right direction of the suction main body 11. The output shaft of the electric motor 40 extends toward one end in the left-right direction, and is connected to the first rotary cleaning body 20 via the toothed belt 41 at one end (the right end in the drawing) in the suction body 11. Have been.

  The circuit board 50 is mounted on the opposite side of the electric motor 40 in the left-right direction of the suction main body 11. The circuit board 50 has a rectangular substrate having long sides arranged along the left-right direction, and is arranged in the suction main body 11 with the mounting surface facing upward in the vertical direction. Note that the mounting surface is not necessarily limited to be vertically upward, and may be inclined with respect to the horizontal direction, or may be directed in the front-rear direction (vertically).

FIG. 6 is a sectional view taken along line BB in FIG. 6, reference numeral 63 denotes a front partition separating the brush chamber Q and the pressure equalizing chamber P, and reference numeral 64 denotes a rear partition separating the second rotary cleaning body 30 and the pressure equalizing chamber P. In this embodiment, the front partition 63 constitutes the first hermeticity maintaining means, and the rear partition 64 constitutes the second hermeticity maintaining means.
As shown in FIG. 6, the pressure equalizing chamber P has an opening (suction port) toward the cleaning surface M, and the other surface is surrounded by a partition wall of the suction body housing, and the flow path shown in FIG. It is in flow communication with R. In the pressure equalizing chamber P, the negative pressure can be increased by the front partition 63 and the rear partition 64. Further, the front partition 63 and the rear partition 64 have a gap with the cleaning surface M of about 3 mm to 5 mm in order to prevent damage to the cleaning surface M, but relatively large dust may be sucked from the front. Therefore, the gap between the front partition 63 and the cleaning surface M is preferably larger than the gap between the rear partition 64 and the cleaning surface M.
The opening width L4 of the pressure equalizing chamber is desirably 6 mm or more because relatively large dust needs to pass therethrough. When the opening width L4 is increased, the suction force between the suction body and the floor surface increases, and the operation width increases. It is desirable that the diameter be smaller than the diameter of the first rotary cleaning body 20 because the resistance increases.
When the suction body advances, the front dust D1 is scraped off by the first rotary cleaning body 20 and sent to the rear of the suction body. Then, the air is sucked into the pressure equalizing chamber P through the gap between the front partition 63 and the cleaning surface M, and flows into the flow path R (see FIG. 3). At this time, the second rotation cleaning body 30 does not rotate due to rotation restriction means (not shown).
On the other hand, when the mouthpiece retreats, as shown in FIG. 7, the rotation restricting means (not shown) is released, and the second rotary cleaning body 30 rotates in the direction of the arrow due to the frictional force with the surface M to be cleaned. The rear dust D2 is sent to the front of the mouthpiece by the rotation of the second rotary cleaning body 30. Then, the air is sucked into the pressure equalizing chamber P through the gap between the rear partition 64 and the cleaning surface M, and flows into the flow path R (see FIG. 3).

  FIG. 8 is a sectional view taken along line CC in FIG. In FIG. 8, the pressure equalizing chamber P has substantially the same cross-sectional area in the same range as the width L <b> 2 of the first rotary cleaning body 20 behind the first rotary cleaning body 20. Thereby, the negative pressure at the opening of the pressure equalizing chamber P can be made substantially uniform irrespective of the width position of the suction body, and high dust collection can be achieved particularly near both ends of the suction body.

  Further, the width L5 of the flow path R communicating with the pressure equalizing chamber P has a width equal to or more than １ ／ of the horizontal width L2. In addition, the vertical expansion angle θ of the flow path R is smaller than 45 degrees. As a result, the flow of air from the pressure equalizing chamber P to the flow path R becomes smooth, and local turbulence of air is suppressed, so that noise can be reduced.

The pressure equalizing chamber P has slopes 60 at both ends. The slope 60 eliminates the stagnation portion of the flow at both ends of the pressure equalizing chamber P, and has an effect of suppressing adhesion and accumulation of dust on both ends of the pressure equalizing chamber P.
Further, by providing recesses in the bearing holding members 31 and 32, the pressure equalizing chamber P has an opening width L3 longer than the lateral width L2 of the first rotary cleaning body 20. Thus, dust on the surface to be cleaned can be sucked with a width wider than the width L2 of the first rotary cleaning body 20 and a width closer to the width of the suction body.

  FIG. 9 is a sectional view taken along line AA in FIG. As shown in FIG. 9, the dust sucked into the pressure equalizing chamber P passes through the first connecting portion 14 and the second connecting portion 15, passes through the extension pipe 5, the hose portion 3, and collects in the cleaner body 2. It is accumulated in the dust part 2b.

FIG. 10 is a sectional view taken along the line EE in FIG. As shown in FIG. 10, a convex portion 61 is provided at the center of the pressure equalizing chamber P, and the front-rear width L6 near the center of the pressure equalizing chamber P is larger than the front-rear width L7 near both ends of the pressure equalizing chamber P. It is getting smaller. In other words, the width in the front-rear direction of the front partition (the first airtight holding means) 63 and the rear partition (the second airtight holding means) 64 is such that both ends near the center in the rotation axis direction of the first rotary cleaning body 20 are opposite ends. It is narrower than nearby. Thereby, the flow of the air flowing from the vicinity of both ends of the pressure equalizing chamber P toward the center is less likely to collide, and flows into the flow passage R smoothly, so that local turbulence of the air is suppressed, thereby reducing noise. .
FIG. 11 is a bottom perspective view of the mouthpiece 6. FIG. 12 is a sectional view taken along line DD in FIG. 11 and 12, reference numerals 65 and 66 denote high-speed airflow outlets, which communicate with the space S. The air sucked from the air inlet 67 enters the space S, accelerates from the space S, and is injected from the high-speed air outlets 65 and 66 to the floor surface M. The high-speed airflow has an effect of blowing off dust on the floor surface M. Further, depending on the state of the floor surface M, for example, in the case of a carpet having high airtightness, the negative pressure of the pressure equalizing chamber P becomes too large, and the suction body 6 sticks to the floor surface M, and the operation force becomes too heavy. Has the effect of preventing.
Further, the opening area of the high-speed airflow outlet 66 is set smaller than the opening area of the high-speed airflow outlet 65. In other words, the area of the nozzle opening is such that the area of the high-speed airflow outlet 66, which is the nozzle opening closer to the center in the rotation axis direction of the rotary brush, is larger than the area of the high-speed airflow outlet 65, which is the nozzle opening closer to both ends. Is set smaller than the area of. This is because the negative pressure in the pressure equalizing chamber P is large at the central portion, so that the opening area is reduced to equalize the flow rates of the high-speed airflows spouted from the high-speed airflow outlets 65 and 66, thereby making the floor surface M more uniform. It has the effect of blowing off dust.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner 2 Vacuum cleaner main body 2a Electric blower 2b Dust collection part 6 Suction body 10 Suction case 20 1st rotary cleaning body (rotary brush)
30 second rotating cleaning body 40 motor 50 circuit board (control board)
Numeral 60 Slope 61 Convex portion 63 Front partition (first airtight holding means)
64 Rear partition (second airtightness maintaining means)
65 High-speed airflow outlet large 66 High-speed airflow outlet small M Surface to be cleaned (floor surface)
Q Brush chamber P Equalizing chamber

Claims (2)

A rotary brush which is rotated by the electric motor, and the rotating brush detachable brush chamber, a suction port having an opening in a cleaning surface located in parallel with said brush chamber, between said brush chamber and the suction opening a first gas-tight seal means positioned, a second gas-tight seal means on the rear of the front Symbol suction port, an intake port for communicating the inside and outside suction body top, and the first gas-tight seal means and the A plurality of nozzle openings are provided between the second airtightness holding means from the intake port to the opening, and the area of the nozzle opening is closer to the vicinity of the center in the rotation axis direction of the rotating brush, A suction body for a vacuum cleaner characterized by being smaller than an area closer to both ends . An electric vacuum cleaner comprising: a cleaner main body provided with an electric blower and a dust collector; and the mouthpiece according to claim 1 .

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