JP2018011738A - Suction port body of vacuum cleaner and vacuum cleaner including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction port body of a vacuum cleaner with excellent operability for suppressing the increase of noise while improving dust collection performance, and preventing excessive sticking of the suction port body to a floor surface, and also to provide a vacuum cleaner including the suction port body.SOLUTION: A suction port body includes; first air-tightness holding means positioned between a brush chamber and a suction port; and second air-tightness holding means arranged at a position different from that of the first air-tightness holding means. A width close to a center part in a rotational axis direction of a rotation brush is smaller than a width close to both ends concerning a width between the first air-tightness holding means and the second air-tightness holding means in a front and rear direction.SELECTED DRAWING: Figure 10

Description

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

As a background art in this technical field, there is JP 2000-037327 A (Patent Document 1). In this publication, a brush chamber in which a brush for scraping dust on a surface to be cleaned is rotatably accommodated and an intake chamber in which a suction force acts are provided in the floor nozzle cover, and the brush chamber is provided between the brush chamber and the intake chamber. A vacuum cleaner floor nozzle is described in which a partition is provided and a gap is provided between the lower end of the partition and the surface to be cleaned.
Japanese Patent No. 04904228 (Patent Document 2) discloses a horizontally long brush chamber that is released toward a lower floor and stores a horizontally long rotating brush, and an intake chamber that is provided in parallel with the brush chamber. A suction port that is connected to the suction chamber and opens toward the floor parallel to the suction chamber, and a partition wall that separates the brush chamber from the suction chamber, and is perpendicular to the floor surface and has a gap at the lower end. And a partition wall having a substantially U-shaped cross section facing the floor surface, and an enlarged intake chamber parallel to the intake chamber is formed on the opposite side of the brush chamber at the upper side of the brush chamber, There is described a suction nozzle of a vacuum cleaner in which an intake chamber is formed integrally with the enlarged intake chamber.

JP 2000-037327 A Japanese Patent No. 04904228

However, the suction port described in Patent Document 1 increases the suction force, but increases the flow rate of air in the suction port and may increase noise.
In addition, since the suction port body described in Patent Document 2 has an enlarged intake chamber at the top of the brush chamber, dust that has been lifted up by the brush falls again into the brush chamber due to gravity and is sucked into the connecting pipe. There is a risk that it will be difficult. This phenomenon appears remarkably in the vicinity of both ends of the suction port body having a weak suction force.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a suction body for a vacuum cleaner with good operability, which improves dust collection performance, suppresses an increase in noise, prevents excessive sticking of the suction body to the floor surface, and has the operability. To provide a vacuum cleaner.

A rotating brush having a shaft and a brush disposed around the shaft; an electric motor for rotating the rotating brush; a brush chamber in which the rotating brush can be attached and detached; and a brush chamber positioned in parallel with the brush chamber. A suction port having an opening on the surface to be cleaned; a first hermetic holding unit located between the brush chamber and the suction port; and a second hermetic holding unit at a position different from the first hermetic holding unit The width in the front-rear direction of the first hermetic holding means and the second hermetic holding means is narrower in the vicinity of the center in the rotation axis direction of the rotary brush than near both ends.
And a plurality of nozzles facing the opening from the intake port between the first airtight holding means and the second airtight holding means. The nozzle opening area is characterized in that the area near the center in the direction of the rotation axis of the rotating brush is narrower than the area near the both ends.

According to the present invention, the difference between the negative pressure at the suction port near the center of the rotating brush (gauge pressure, which is lower than atmospheric pressure) and the negative pressure at the suction port near both ends of the rotating brush can be reduced. Furthermore, since the negative pressure can be increased (the absolute value is large) by the first hermetic holding means and the second hermetic holding means, the dust collection performance can be improved.
Furthermore, since local turbulence can be suppressed, noise can be reduced.
Furthermore, excessive sticking of the mouthpiece to the floor surface can be prevented, and a mouthpiece having good operability can be provided.

It is an appearance perspective view showing the whole vacuum cleaner concerning the present invention. It is a top view of the mouthpiece concerning the present 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 of the state which removed the upper part of the mouthpiece concerning the present invention. It is BB sectional drawing at the time of advance of the suction mouth body of FIG. It is BB sectional drawing at the time of retraction of the suction body shown in FIG. It is CC sectional drawing of the mouthpiece described in FIG. It is AA sectional drawing of the mouthpiece described in FIG. It is EE sectional drawing of the mouthpiece described in FIG. It is a bottom perspective view of the mouthpiece described in FIG. It is DD sectional drawing of the mouthpiece described in FIG.

  Embodiments according to the present invention will be described below 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 body 2, an operation tube 4 connected to the hose portion 3 and provided with a hand operation switch SW and the like, an extendable tube 5 provided to be extendable and a mouthpiece 6. ing.

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

  One end of the hose part 3 is connected to the connection port 2c of the cleaner body 2 so as to communicate with the dust collecting part 2b of the cleaner 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 4a provided with 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. An energization terminal (not shown) provided at one end of the extension pipe 5 is connected to the power supply terminal.

  By operating the hand operation switch SW of the operation tube 4, it is possible to operate and stop the electric blower 2a, to switch between strong, medium and weak, and to operate and stop the electric motor 40 (see FIG. 4) provided in 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 be extendable. FIG. 1 illustrates a state in which 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 that has a substantially T shape in a top view and a mouthpiece joint 13 that is 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) in a top view, and a connecting portion 12 that is connected to the mouthpiece joint 13 at the center in the left-right direction of the mouthpiece body 11. . A flow path R (see FIG. 3) that connects the suction body 11 and the suction joint 13 is formed in the connecting portion 12.
The mouthpiece main body 11 is provided with a bumper 11a from the front end surface to the left and right side surfaces. The bumper 11a is made of an elastic material such as rubber or elastomer, and ensures airtightness in the mouthpiece body 11 when used, and the mouthpiece body 11 collides with furniture or the like when the electric vacuum cleaner 1 (see FIG. 1) is used. When it does, it plays the role of the shock absorbing material which prevents the said furniture etc. from being damaged and absorbs the impact to the suction mouth main body 11.
The suction joint 13 includes a first connecting portion 14 that is rotatably connected to the connecting portion 12, and a second connecting portion 15 that is rotatably connected to the first connecting portion 14. Yes.
The first connecting portion 14 has a substantially semi-track shape in a top view of FIG. 2 and has a cylindrical shaft 14 a that is connected to the connecting portion 12. The shaft 14 a is supported by a bearing portion 12 g (see FIG. 5) in which the axial direction is the left-right direction of the inlet body 11 and both ends of the shaft 14 a are formed in the connecting portion 12. Moreover, the 1st connection part 14 is comprised so that it can rotate from a substantially parallel state with respect to the to-be-cleaned surface (cleaning surface) M (refer FIG. 4) to a substantially perpendicular state (up-down direction). Yes. That is, by rotating the first connecting portion 14 with respect to the suction case 10 with the shaft 14a as a fulcrum, the extension tube 5 (see FIG. 1) is substantially parallel to the surface to be cleaned M (see FIG. 4). It can be rotated between vertical states.

  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 mouthpiece body 11 (clockwise and counterclockwise in FIG. 2). Thereby, for example, the extension pipe 5 can be tilted toward a state substantially parallel to the surface to be cleaned M from a state in which the extension tube 5 is substantially perpendicular to the surface to be cleaned M.

  In addition, the second connecting portion 15 is provided with a power supply terminal 15a through which power is supplied. In addition, in the vacuum cleaner 1 (refer FIG. 1) of a present Example, it has comprised so that the electric power supplied to the suction body 6 may be supplied from the cleaner body 2 through the hose part 3, the operation tube 4, and the extension tube 5. Yes. 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 rotary cleaning body (rotary brush) 20 and a second rotary cleaning body 30. The suction case 10 (suction body 11) is formed with a brush chamber Q having an opening on the lower surface (a surface facing the cleaning surface) and a pressure equalizing chamber P having an opening (suction port) on the lower surface. Yes.

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 body 11 and is rotatably supported in the brush chamber Q. Moreover, the 1st rotation cleaning body 20 is provided continuously from the one end side of the left-right direction (the axial direction of the 1st rotation cleaning body 20) of the suction inlet main body 11 to the other end side.
The first rotary cleaning body 20 includes a plurality of types of brushes 20a, 20b, 20c such as brushes having different hardnesses, and the brushes 20a, 20b, 20c are arranged in a spiral shape. 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 and may be two types or less, and may be four types. The above may be sufficient, and the structure which arrange | positions the braid | blade member which consists of elastic materials, such as rubber | gum, between the brushes arrange | positioned spirally may be added, and it can change suitably.
The second rotary cleaning body 30 is smaller than the diameter of the first rotary cleaning body 20, is covered with a brush body, and is disposed rearward and parallel to the first rotary cleaning body 20. Further, the second rotary cleaning body 30 is provided continuously from one end side to the other end side in the left-right direction of the suction body 11 in parallel with the axial direction of the first rotary cleaning body 20.

  Moreover, the 2nd rotary cleaning body 30 has the axial part 30a (shaft) parallel to the rotating shaft 21 of the 1st rotary cleaning body 20, and the axial part 30a is rotatably supported by the suction case 10 (suction body 11). Has been. The second rotary cleaning body 30 is not driven by an electric motor, but is configured to rotate by frictional force with the surface to be cleaned M (see FIG. 4) when the suction body 6 is moved. It is. Thus, since the 2nd rotation cleaning body 30 is supported by the suction inlet main body 11 via the axial part 30a, the structure of the 2nd rotation cleaning body 30 can be simplified.

  The mouthpiece 6 includes a brush drive switch 16, a wheel 17, and bearing pressing 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 suction body 6 is in contact with the surface to be cleaned M (cleaning surface), and is configured together with the wheel 16a. The wheel 16a is provided so that a part of the wheel 16a always protrudes from the lower surface of the suction case 10 (connecting portion 12) by a biasing means such as a spring. When it is detected that the wheel 16a has jumped out of the suction case 10 and is not in contact with the surface M to be cleaned, the drive of the electric motor 40 (see FIG. 5) is controlled 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. When it is detected that the wheel 16a is pushed into contact with the surface to be cleaned M, 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 / backward movement and rotational operation operated by the operation tube 4, and brings the bottom surface of the mouthpiece 6 into close contact with the surface to be cleaned (cleaning surface), thereby improving the operation performance of the mouthpiece 6. have.

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

  The bearing pressing member 32 supports the rotation shaft of the first rotary cleaning body 20 and the other end of the shaft portion 30a of the second rotary cleaning body 30, and is locked to the suction case 10 so as to be removable (see FIG. (Not shown).

  FIG. 5 is a top view of the mouthpiece with the upper portion of the mouthpiece case 10 removed.

  As shown in FIG. 5, the mouthpiece 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 side of the suction body 11 in the left-right direction. Further, the output shaft of the electric motor 40 is arranged in parallel with the left-right direction of the suction mouth main body 11. The output shaft of the electric motor 40 extends toward one end side in the left-right direction, and is connected to the first rotary cleaning body 20 via a toothed belt 41 at one end portion (right end portion in the figure) in the suction body 11. Has been.

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

6 is a cross-sectional view taken along the line BB in FIG. In FIG. 6, 63 is a front partition that separates the brush chamber Q and the pressure equalizing chamber P, and 64 is a rear partition that separates the second rotary cleaning body 30 and the pressure equalizing chamber P. In this embodiment, the front partition 63 constitutes the first hermetic holding means, and the rear partition 64 constitutes the second hermetic holding means.
As shown in FIG. 6, the pressure equalization 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 fluid communication with R. The pressure equalizing chamber P can increase the negative pressure by the front partition wall 63 and the rear partition wall 64. In addition, the front partition wall 63 and the rear partition wall 64 have a gap with the cleaning surface M of about 3 mm to 5 mm to prevent the cleaning surface M from being damaged, but relatively large dust may be sucked from the front. Therefore, it is desirable that the gap between the front partition wall 63 and the cleaning surface M is larger than the gap between the rear partition wall 64 and the cleaning surface M.
Moreover, the opening width L4 of the pressure equalizing chamber is preferably 6 mm or more because it is necessary to pass relatively large dust, and if the opening width L4 is increased, the suction force between the suction body and the floor surface is increased. Since the resistance increases, it is desirable that the diameter is smaller than the diameter of the first rotary cleaning body 20.
When the mouthpiece moves forward, the front dust D1 is scraped off by the first rotary cleaning body 20 and sent to the rear of the mouthpiece. Then, the air is sucked into the pressure equalizing chamber P through the gap between the front partition wall 63 and the cleaning surface M, and flows into the flow path R (see FIG. 3). At this time, the second rotary cleaning body 30 does not rotate by a rotation restricting means (not shown).
On the other hand, when the suction body moves backward, 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 to be cleaned M. The rear dust D2 is sent to the front of the mouthpiece as the second rotary cleaning body 30 rotates. Then, the air is sucked into the pressure equalizing chamber P through the gap between the rear partition wall 64 and the cleaning surface M, and flows into the flow path R (see FIG. 3).

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

  Further, the width L5 of the flow path R communicating with the pressure equalizing chamber P has a width of 1/3 or more of the lateral width L2. Further, 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 is suppressed, so that noise can be reduced.

In addition, slopes 60 are provided at both ends of the pressure equalizing chamber P. This slope 60 eliminates the stagnation of the flow at both ends of the pressure equalizing chamber P, and has the effect of suppressing the adhesion and accumulation of dust at both ends of the pressure equalizing chamber P.
Further, the pressure equalizing chamber P has an opening width L <b> 3 longer than the lateral width L <b> 2 of the first rotary cleaning body 20 by providing the bearing pressing members 31 and 32 with recesses. Thereby, the dust on the surface to be cleaned can be sucked with a width wider than the lateral width L2 of the first rotary cleaning body 20 and closer to the lateral width of the suction body.

  9 is a cross-sectional view taken along the 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 and the hose portion 3, and is collected in the vacuum cleaner main body 2. Accumulated in the dust part 2b.

10 is a cross-sectional view taken along line EE in FIG. As shown in FIG. 10, the pressure equalizing chamber P has a convex portion 61 at the center, 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 narrower. In other words, the width in the front-rear direction between the front partition wall (first airtight holding means) 63 and the rear partition wall (second airtight holding means) 64 is near the center in the rotational axis direction of the first rotary cleaning body 20 at both ends. It is narrower than the vicinity. As a result, air flows from the vicinity of both ends of the pressure equalizing chamber P to the center are less likely to collide and smoothly flow into the flow path R, so that local air turbulence can be suppressed, and noise can be reduced. .
FIG. 11 is a bottom perspective view of the mouthpiece 6. 12 is a cross-sectional view taken along the line DD in FIG. In FIGS. 11 and 12, 65 and 66 are high-speed air flow outlets and communicate with the space S. The air sucked from the air inlet 67 enters the space S, accelerates from there, and is jetted from the high-speed air current outlets 65 and 66 onto the floor surface M. This high-speed air flow 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 highly airtight carpet, the negative pressure in the pressure equalizing chamber P becomes too large, and the suction body 6 sticks to the floor surface M, so that the operating force becomes too heavy. There is an effect to prevent.
In addition, 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 nozzle opening area is the high-speed air flow outlet 65 which is the nozzle opening closer to the center in the rotation axis direction of the rotating brush, and the area of the high-speed air outlet 66 is the nozzle opening closer to both ends. It is set smaller than the area. This is because the negative pressure of the pressure equalizing chamber P is large at the center, and by reducing the opening area, the flow rates of the high-speed air currents ejected from the high-speed air current ejection ports 65 and 66 are made equal, and the floor M It has the effect of blowing off dust.

DESCRIPTION OF SYMBOLS 1 Electric vacuum cleaner 2 Vacuum cleaner main body 2a Electric blower 2b Dust collection part 6 Suction body 10 Suction case 20 1st rotation cleaning body (rotary brush)
30 Second rotating cleaning body 40 Electric motor 50 Circuit board (control board)
60 slope 61 convex part 63 front partition (first airtight holding means)
64 Rear partition (second airtight holding means)
65 Large high-speed airflow outlet 66 Small high-speed airflow outlet M Surface to be cleaned (floor surface)
Q Brush chamber P Pressure equalizing chamber

Claims (3)

A rotating brush having a shaft and a brush disposed around the shaft; an electric motor for rotating the rotating brush; a brush chamber in which the rotating brush can be attached and detached; and a brush chamber positioned in parallel with the brush chamber. A suction port having an opening on the surface to be cleaned; a first hermetic holding unit located between the brush chamber and the suction port; and a second hermetic holding unit at a position different from the first hermetic holding unit A vacuum cleaner characterized in that a width in the front-rear direction of the first airtight holding means and the second airtight holding means is narrower in the vicinity of the center in the rotational axis direction of the rotary brush than in the vicinity of both ends. Mouthpiece. A rotating brush that is rotated by an electric motor; a brush chamber in which the rotating brush can be attached and detached; a suction port that is positioned in parallel with the brush chamber and has an opening in a surface to be cleaned; and the brush chamber and the suction port. A first airtight holding means positioned; a second airtight holding means behind the suction port; and an intake port communicating with the inside and the outside at the upper portion of the suction body, the first airtight holding means and the first A plurality of nozzle openings from the air inlet to the opening between the two airtight holding means, the nozzle opening area being the area closer to the center in the rotation axis direction of the rotary brush, The suction mouthpiece of the vacuum cleaner characterized by being smaller than the area near the vicinity.   A vacuum cleaner comprising: a vacuum cleaner body provided with an electric blower and a dust collecting part; and the mouthpiece according to claim 1 or 2.

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