JP2004173759A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner which is provided with a plurality of suction ports at a suction head body so that each of the suction ports can selectively be used according to each way of cleaning on different floor surfaces. <P>SOLUTION: In the center of the right and left direction of a suction head body 201, a partition wall 212 a little thicker than a partition wall 209 is provided so as to make the distance of the thickness direction of a separate suction port path 211 shorter than those on both of the right and left sides. Thus, a spatial distance in the thickness direction in a separate suction port path 211b connected with a concentrated port 210 from both of the right and left sides in front is longer than that at a separate suction port path 211a in the center of the separate suction port path 211. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a configuration of a suction port of a vacuum cleaner.
[0002]
[Prior art]
In a vacuum cleaner, dust is sucked from a suction port together with an airflow generated by operation of an electric blower, and the sucked airflow is introduced into a dust collector to collect dust. 2. Description of the Related Art Conventionally, as this type of vacuum cleaner, there is one in which a suction port is provided in a suction port main body (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 8-164,095
[Problems to be solved by the invention]
However, in the configuration described in Patent Document 1, since the suction port is a single unit, it is not possible to set suction characteristics individually adapted to each of a plurality of floor surfaces such as carpets, boards, and tatami mats. was there. In view of the above problems, the present invention provides a plurality of suction ports in a suction port body, and each of those suction ports can be selectively used according to each cleaning on a plurality of floor surfaces. It is intended to provide a vacuum cleaner.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, a plurality of suction ports are provided in a suction port main body, and at least one of the suction port passages communicating with each of the plurality of suction ports is provided at a predetermined position of the suction port. Adjusting means for adjusting the amount of ventilation to be provided. Further, a suction port switching device for switching and using the plurality of suction ports is provided.
[0006]
As described above, by providing a plurality of suction ports, suction characteristics corresponding to different applications can be set in one suction port main body, and a means for adjusting the ventilation amount at a predetermined position of the suction port. Is provided in the passage, the wind velocity at each position of the suction port communicating with the passage can be made uniform, the suction can be performed uniformly, and the suction performance is improved. In addition, when the airflow at the left and right ends is set to be increased, even when the suction port cannot be provided to the left and right ends of the suction port main body, dust can be sucked up to the left and right end areas of the suction port main body. And the suction performance of the suction port body is improved.
[0007]
Specifically, by providing a means for adjusting the amount of ventilation at a predetermined position of another suction port in another suction port passage passing upward from the front of the suction port passage, it is possible to gradually gradually increase the flow rate in a long area of the passage. The ventilation amount can be adjusted, the ventilation amount can be adjusted with little loss, and the suction performance can be further improved.
[0008]
Further, the adjusting means is characterized in that a spatial distance in a thickness direction of the suction port passage provided with the adjusting means is made different at a predetermined position. As a result, the ventilation amount can be adjusted in the intake passage or the separate intake passage where the ventilation process can be set to be relatively long, and the ventilation passage can be changed by changing the thickness direction of the passage, so that the ventilation passage is a single open space. Since there is no obstacle, it is possible to adjust the ventilation amount with little loss, and it is possible to further improve the suction performance.
[0009]
Further, a spatial distance in a thickness direction of a portion connected from the left and right sides of the suction port to the inner side of the suction port in the depth direction is larger than other portions. As a result, the amount of air flow on both sides of the suction port main body increases, and the suction port can be set to a width smaller than the width of the suction port main body, and the remaining width of the suction port main body can be used as a reinforcing portion. As a result, a suction port main body having impact strength can be obtained.
[0010]
Further, a partition wall between the suction port passage provided with the adjusting means and a suction port passage adjacent thereto is characterized in that a partition wall surface on the side of the suction port passage adjacent thereto is linear in the left-right direction. Thereby, the ventilation state of the suction port passage can be set irrespective of the change of the separate suction port passage, and the suction port and the separate suction port can be set freely, so that each suction port further matches the suction purpose. Can be easily obtained. In addition, the appearance of the suction port main body on the side of the other suction port passage can be made a smooth surface without unevenness, so that the suction port main body having a sense of stability in design can be obtained.
[0011]
Further, the depth of the suction port passage on the back side of the suction port side is larger or equal in the thickness direction. Thereby, a suction port main body with less dust clogging in each of the corresponding suction port passages is obtained.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the structure of the vacuum cleaner 1 according to the first embodiment of the present invention will be described with reference to FIGS. In describing the structure of the vacuum cleaner 1, the side on which the user stands in the form of putting the vacuum cleaner 1 in front and then standing and operating the vacuum cleaner 1 is the rear side of the vacuum cleaner 1. The opposite side is defined as the front side (front side) of the vacuum cleaner 1. Regarding left and right, when the vacuum cleaner 1 is viewed from the front (front), the left side of the observer is defined as the left side of the vacuum cleaner 1 and the opposite side is defined as the right side of the vacuum cleaner 1.
[0013]
The vacuum cleaner 1 is of an upright type and is roughly divided into two parts. One is the cleaner main body 10 and the other is the suction opening body 70. The shell (for example, made of a synthetic resin molded product) that forms the suction port body 70 has the following structure. First, there is a flat box-shaped central shell 71 at the center, and side shells 72 and 73 are provided on the left and right sides. The rear portions of the side shells 72, 73 project rearward from the central shell 71 to form rear projections 74, 75. The suction port body 70 has a U-shaped planar shape as a whole, and receives the cleaner body 10 between the rear protruding portions 74 and 75.
[0014]
The cleaner body 10 is formed from two shell parts. One of them is a cylindrical blower shell 11, and the other is a dust collector holding portion 12 protruding from the blower shell 11. An electric blower 13 is disposed inside the blower shell 11 (see FIG. 2). The axis of the electric blower 13 is substantially parallel to the axis of the blower shell 11 and both are substantially horizontal.
[0015]
The blower shell 11 is disposed between the rear protruding portions 74 and 75 of the suction opening body 70 with the axis substantially in a horizontal state, and a support shaft disposed on the axis is fitted to the rear protruding portions 74 and 75. On the side of the rear protruding portion 74, the support shaft 14 protruding from the end surface of the blower shell 11 is supported by a bearing portion 76 provided on the rear protruding portion 74. On the side of the rear protrusion 75, the drive shaft 15, which is an extension of the motor shaft of the electric blower 13, enters the rear protrusion 75. A cylindrical support shaft (not shown) surrounding the drive shaft 15 is projected from the end surface of the blower shell 11, and the cylindrical support shaft is supported by a bearing portion 77 provided on a rear projecting portion 75. The blower shell 11 is connected to the suction port body 70 by these left and right support shafts so as to be rotatable around a horizontal axis.
[0016]
The dust collector holding part 12 is hollow and elongated as a whole, that is, has a longitudinal direction, and the longitudinal direction is substantially perpendicular to the axis of the blower shell 11. The projecting position of the dust collecting device holding portion 12 is not at the center of the blower shell 11 but at one of the right and left sides. In the first embodiment, the dust collector holding unit 12 projects from the left side of the blower shell 11.
[0017]
On one side of the dust collecting device holding portion 12, a pedestal portion 16 and an overhang portion 17 for supporting a bottom portion and a top portion of the dust collecting device described later are provided. The pedestal portion 16 is provided so as to rise from the blower shell 11, and the overhang portion 17 is formed on a side surface of the dust collecting device holding portion 12. The base 16 and the overhang 17 occupy a space above the blower shell 11. That is, it is located on the right side of the dust collector holding unit 12. A rear support wall 18 is provided between the pedestal portion 16 and the overhang portion 17 to support a left half of a dust collector described later from behind (see FIG. 3). The rear support wall 18 is formed on a side surface of the dust collector holding unit 12.
[0018]
20 is a dust collecting device. The dust collecting device 20 collects dust by a cyclone method by rotating an air current at a high speed in an elongated cylindrical dust cup 21. As shown in FIG. 2, the inside of the dust cup 21 is divided into two upper and lower chambers by a horizontal partition wall 22. The lower section is a centrifuge chamber 23 and the upper section is an exhaust chamber 24.
[0019]
An inlet 25 is provided on one side of the centrifugal separation chamber 23. The inflow port 25 is set at a position and an angle such that a swirling airflow is generated along the inner peripheral wall of the centrifugal separation chamber 23.
[0020]
An exhaust pipe 26 is arranged at the center of the centrifugal separation chamber 23. The exhaust pipe 26 is a cylindrical basket-shaped member having a closed lower surface and an open upper surface. The upper opening is joined to a vent 27 formed at the center of the horizontal partition 22, and the exhaust pipe 26 hangs down from the horizontal partition 22. Supported in shape. A filter 28 having a fine mesh made of synthetic fiber such as nylon is attached to the outer peripheral surface of the exhaust pipe 26.
[0021]
A stabilizer 29 is attached to a lower end of the exhaust pipe 26. The stabilizer 29 is formed by radially combining four wing pieces, and has a horizontal cross-section having a cross shape. The tip of the stabilizer 29 reaches near the bottom of the dust cup 21. The stabilizer 29 functions to promote the separation of dust from the airflow and to suppress the movement of dust accumulated at the bottom of the dust cup 21.
[0022]
In order to discard the dust in the dust cup 21 or clean the filter 28, the dust collecting device 20 is provided with an access opening by an appropriate method. The access opening can be realized by, for example, a structure in which the upper part of the dust cup 21 is covered with a lid, and when the lid is opened, the horizontal partition wall 22 and the exhaust pipe 26 and the stabilizer 29 are pulled out from the lid. Alternatively, it can be realized by forming the exhaust chamber 24 into a main body of the dust collecting device 20 and the centrifugal separation chamber 23 into a dust cup detachable from the main body, and the dust collecting device 20 into a vertically divided structure.
[0023]
An outlet 30 is formed in the exhaust chamber 24. As shown in FIG. 3, the inlet 25 and the outlet 30 are provided on the side of the dust collector 20 facing the dust collector holding unit 12. The inflow port 25 and the outflow port 30 face the same direction, that is, substantially to the left.
[0024]
A first ventilation path 31 is provided for the inflow port 25 of the dust collector 20, and a second ventilation path 32 is provided for the outflow port 30. The first ventilation path 31 communicates with a suction port (details will be described later) of the suction port body 70, and guides the airflow sucked from the suction port to the inflow port 25. The second ventilation path 32 communicates with the suction port of the electric blower 13, and guides the airflow that has flowed out of the outlet 30 to the electric blower 13.
[0025]
The main part of the first ventilation path 31 is constituted by a flexible hose 33. One end of the flexible hose 33 is fixed to one end of a connection pipe 34 (see FIG. 3) provided horizontally on the dust collector holding unit 12. The other end of the connection pipe 34 serves as an outlet 35 of the first ventilation path 31, to which the inlet 25 of the dust collector 20 is connected. A seal ring 36 is attached to the outlet 35 to maintain airtightness when the inlet 25 is connected. The other end of the flexible hose 33 is detachably fitted to a connection pipe 78 protruding from the upper surface of the side shell 72 of the suction port body 70. The connection pipe 78 communicates with the suction port.
[0026]
The main part of the first ventilation path 31 may be formed of a tubular body other than the flexible hose. For example, a plurality of rigid pipes can be replaced by ones that are connected to extend and contract. The point is that the tube can absorb the fluctuation of the distance between the connection pipe 34 and the connection pipe 78 when the cleaner body 10 is upright and when it is turned down, and the internal pressure is lower than the atmospheric pressure and does not collapse. Any body is acceptable.
[0027]
The second ventilation path 32 is constituted by the hollow part itself of the dust collector holding part 12. The upper portion of this hollow portion is delimited by a partition wall 12a (see FIG. 2), so that the second air passage 32 does not communicate with the overhang portion 17. An inlet 37 of the second ventilation path 32 is formed on a side surface of the dust collector holding part 12 at a position corresponding to the outlet 30 of the dust collector 20. In order to maintain airtightness when the outlet 30 is connected, a seal ring 38 is attached to the inlet 37.
[0028]
As can be seen in FIG. 2, the lower end of the second ventilation channel 32 reaches the bottom of the blower shell 11. An outlet 39 is provided in a side wall at the lower end of the second ventilation path 32. The outlet 39 is directly connected to a suction port 13 a of the electric blower 13 via a vibration-proof cushion 40 that also serves as airtightness.
[0029]
The dust collecting device 20 is attached to the dust collecting device holding unit 12 through an operation of pressing the dust collecting device 20 against the dust collecting device holding unit 12 such that the longitudinal direction thereof coincides with the longitudinal direction of the dust collecting device holding unit 12. More specifically, the attachment is performed through an operation of inserting the dust collecting device 20 into a space surrounded by the pedestal portion 16, the overhang portion 17, and the rear support wall 18.
[0030]
A slide-type latch 43 is mounted on the upper end of the dust collecting device 20. The latch 43 is constantly pushed upward by a spring (not shown), and engages with the edge of the overhang portion 17 at the final stage of insertion of the dust collector 20. In this case, the dust collecting device 20 cannot be removed from the dust collecting device holding unit 12 unless the latch 43 is pressed down against the spring (not shown) and detached from the overhang portion 17.
[0031]
The inside of the base 16 communicates with an exhaust space 50 where the electric blower 13 exhausts air. A filter 51 is inserted into the base 16. The filter 51 collects fine dust that has passed through the filter 28 of the dust collection device 20. For example, the filter 51 has a higher filtration performance than the filter 28, and is a high-efficiency (HEPA).
(particulate air) filter or the like may be used.
[0032]
The airflow having the dust captured by the filter 51 returns to the room through an exhaust port 54 formed in front of the pedestal portion 16. The exhaust port 54 has a shape in which a plurality of horizontal slits are arranged vertically.
[0033]
The control section 60 is disposed inside the overhang section 17 (see FIG. 2). The control unit 60 and the electric blower 13 are connected via a lead wire. The control unit 60 controls the operation of the entire vacuum cleaner 1. An upper front portion of the overhang portion 17 becomes an operation panel portion 61 in which various switch buttons are arranged. Since the operation panel section 61 is provided on the overhang section 17, the operation is easy.
[0034]
A separately formed handle 62 is fixed to the tip of the dust collector holding unit 12. A bracket 63 protrudes obliquely downward from the rear lower surface of the blower shell 11, and a wheel 64 is attached to the bracket 63 (see FIG. 4). The wheels 64 are provided one at each of the left and right ends of the blower shell 11. In front of the wheels 64, support legs 65 are also formed, one each on the left and right. When the dust collector holding unit 12 is set up vertically, the cleaner body 10 is supported at four points on the floor by the wheels 64 and the support legs 65.
[0035]
Next, the structure of the suction port body 70 will be described. As described above, the suction port body 70 is provided with side shells 72 and 73 on the left and right sides of a flat box-shaped central shell 71, and rear portions of the side shells 72 and 73 are formed as rear projections 74 and 75. . The center shell 71 and the side shells 72 and 73 are integrally formed of, for example, a synthetic resin.
[0036]
The lower surfaces of the central shell 71 and the side shells 72 and 73 are openings, and the bottom plate 80 closes the openings. A plurality of suction ports are formed in a front portion of the bottom plate 80. The rear part of the bottom plate 80 has a slope that becomes higher toward the rear.
[0037]
In the first embodiment, two suction ports are provided in a front part of the bottom plate 80 in a form arranged in front and rear. The first suction port 81 is elongated in the left and right directions and has a width substantially equal to the width of the suction port body 70 excluding a belt driving unit described later. The second suction port 82 is formed parallel to the first suction port 81 and located in front of the first suction port 81. The opening area of the second suction port 82 is much smaller than the opening area of the first suction port 81.
[0038]
Independent suction passages are provided for the first suction port 81 and the second suction port 82, respectively. The suction passage 83 for the first suction port 81 is formed on the lower surface on the side of the central shell 71 (see FIG. 4). The suction passage 83 has a funnel-like shape, and an outlet 84 is provided at a position deviated leftward when viewed from the front.
[0039]
The suction passage 85 for the second suction port 82 is disposed so as to overlap the suction passage 83. The suction passage 85 is formed between the upper surface side of the central shell 71 and a lid 86 which is detachably attached to the central shell 71 at a distance therefrom. The lid 86 has its front end hooked on the central shell 71 and its rear end connected to the central shell 71 with screws or latches 86a to maintain the attached state. The lid 86 is formed of a transparent or translucent material so that the inside of the suction passage 85 can be seen from the outside. The outlet 87 of the suction passage 85 is provided near the rear center of the suction passage 85.
[0040]
An inlet switching device 90 is disposed inside the rear projection 74 of the side shell 72. The suction-port switching device 90 has two upper and lower inlets 92 and 93 on the front surface of the valve box 91. The lower inlet 92 is connected to the outlet 84 of the suction passage 83. As shown in FIG. 4, by directly connecting the outlet 84 to the inlet 92, the airflow passage structure is simplified, and the flow efficiency is improved. The upper inlet 93 is connected to an outlet 87 of the suction passage 85 via a hose (not shown).
[0041]
An outflow port common to the inflow ports 92 and 93 is provided on the upper surface of the valve box 91. In the case of the first embodiment, the outflow port itself serves as a connection pipe 78 that starts the first ventilation path 31. I have.
[0042]
A switching valve 95 that rotates in a vertical plane is disposed in the valve box 91. The switching valve 95 is attached to a valve shaft 96, and rotates with the rotation of the valve shaft 96. By the rotation, the switching valve 95 selectively closes one of the inflow ports 92 and 93 and opens the other. The detailed structure of the suction port switching device 90 will be described later. On both surfaces of the switching valve 95, a sealing member (not shown) molded of soft rubber or the like is attached to improve airtightness when the inflow ports 92 and 93 are closed.
[0043]
The bottom surface of the suction port body 70 is provided with first and second ground support portions. The first ground support portion 101 is configured by wheels provided so as to be located near the second suction port 82, in this case, at both ends of the second suction port 82.
[0044]
The second ground support 102 is formed by a pair of left and right protrusions formed on the bottom plate 80. The second ground support 102 is provided behind the first suction port 81. This point is also where the inclination of the rear part of the bottom plate 80 starts. When the dust collector holding unit 12 is erected, the second ground support 102 serves as a support for the suction port body 70, and the first ground support 101 rises from the floor as shown in FIG.
[0045]
A guide portion 103 protrudes from the front end of the suction port body 70. The guide portion 103 is located in front of the second suction port 82 and has a width substantially equal to the entire width of the suction port body 70. The lower surface of the guide portion 103 becomes an inclined surface 104 that becomes gradually lower toward the second suction port 82 (see FIG. 5). The front end of the slope 104 has a tip approximately 3 mm higher than the entrance of the second suction port 82.
[0046]
An agitator 110 is provided in the first suction port 81. As the agitator 110, it is common to use a plurality of rows of bristles implanted with a predetermined skew angle around a cylindrical rotating body, but instead of the rows of bristles, rubber or soft synthetic resin is used. A thin piece may be used. The axis of the agitator 110 is in the same direction as the width direction of the first suction port 81, and the agitator 110 is pivotally supported inside the suction port body 70 such that a part of the outer peripheral portion protrudes out of the first suction port 81. .
[0047]
The drive power source of the agitator 110 is the drive shaft 15 of the electric blower 13, from which power is transmitted to the agitator 110 via the following power transmission mechanism. As shown in FIG. 2, a driving pulley 111 is fixed to the driving shaft 15, and a belt 113 is wound around the driving pulley 111 and a driving pulley (described later) fixed to the shaft of the agitator 110 so as to rotate integrally with the agitator 110. Can be hung. The driving pulley 111 and the belt 113 are located inside the side shell 73. The belt 113 may be wound directly around the drive shaft 15 without fixing the separate driving pulley 111 to the drive shaft 15.
[0048]
An idler that can rotate independently of the agitator is arranged side by side with the drive pulley so that the rotation of the agitator 110 can be stopped during operation of the electric blower 13. When the belt 113 is hung on the idler, the idler only idles, and no power is transmitted to the agitator 110. A belt changing device 120 for changing the belt 113 is provided inside the side shell 73, and its structure will be described later in detail.
[0049]
Next, a detailed structure of the suction port switching device 90 will be described with reference to FIGS. The left side surface of the valve box 91 of the suction port switching device 90 is open, and the cover 131 closes this opening. The lid 131 is fixed to the valve box 91 with screws. In order to maintain airtightness, a seal member 91 a is attached to the rim of the opening of the valve box 91.
[0050]
The switching valve 95 and the lever 132 are integrally formed on the valve shaft 96. As the molding method, the three members of the valve shaft 96, the switching valve 95, and the lever 132 may be integrally molded by injection molding of synthetic resin or metal, or may be separately molded and fixed.
[0051]
The right end of the valve shaft 96 is a small diameter portion 96 a, which projects from a shaft hole (not shown) provided in the valve box 91 to the right side of the valve box 91. The left portion of the small diameter portion 96a is pivotally supported by being sandwiched between a concave portion 91b having a semicircular cross section formed on the inner surface of the valve box 91 and a semicircular notch 131a formed on the lid 131. That is, the recess 91b and the notch 131a are combined to form one bearing. The concave portion 91b is located between the inlets 92 and 93, and is located on the upstream side of the air flow inside the valve box 91. The reason for arranging the switching valve 95 upstream of the airflow is to prevent dust from entangled in the valve shaft 96 and affect the movement of the switching valve 95.
[0052]
The lever 132 is integrally formed where the valve shaft 96 comes out of the notch 131a. The lever 132 is a component of an interlocking unit that interlocks the suction port switching device 90 and the belt switching device 120. In order to integrally form the lever 132 in addition to the switching valve 95, a material having a predetermined strength such as engineering plastic grade synthetic resin or metal is used for the valve shaft 96.
[0053]
The lever 132 has a shape in which two long and short arms 132a and 132b are projected from the valve shaft 96 in opposite directions. A slit 132c is formed at the tip of the longer arm 132a. The longitudinal direction of the slit 132c matches the longitudinal direction of the longer arm 132a. A toggle spring 133 is disposed between the shorter arm 132b and the lid 131.
[0054]
The toggle spring 133 is formed by a torsion coil spring, and has one end engaged with the distal end of the shorter arm 132b and the other end engaged with a hollow boss 131b formed on the outer surface of the lid 131. The angular position of the valve shaft 96 where the shorter arm 132b and the hollow boss 131b are closest to each other is a conceivable point. At this point, the toggle spring 133 applies an urging force for closing the inflow port 92 or an urging force for closing the inflow port 93. This is given to the switching valve 95.
[0055]
A pedal 134 for performing a switching operation of the switching valve 95 is mounted on the left end of the valve shaft 96 (see FIG. 1). The pedal 134 is disposed in a concave portion 74 a formed at the upper left corner of the rear projecting portion 74 of the suction opening body 70. The front and rear portions of the pedal 134 centering on the mounting portion to the valve shaft 96 are at an angle to each other, and have a shape of a "ku" when viewed from the side. By stepping on the raised portion of the front and rear portions of the pedal 134, the pedal 134 moves like a seesaw to rotate the valve shaft 96.
[0056]
Next, a detailed structure of the belt transfer device 120 will be described with reference to FIGS. The belt changing device 120 is assembled around the elongated frame 141. The frame 141 is fixed inside the side shell 73 with the longitudinal direction facing the front-rear direction of the suction port body 70. The belt 113 passes under the frame 141. The belt 113 is exchanged between the driving pulley 112 and the idler 114. The drive pulley 112 is fixed to the shaft 110a of the agitator 110 so as to rotate integrally with the agitator 110. The idler 114 is located to the right of the drive pulley 112 and is rotatable independently of the agitator 110.
[0057]
The frame 141 supports a support shaft 142 extending in the front-rear direction. The axis of the support shaft 142 is parallel to the direction in which the belt 113 extends. The support shaft 142 rotatably supports a fork 150 for moving the belt 113. The fork 150 is a combination of a metal main body 151 and a synthetic resin shaft support 152 that cannot rotate with each other. The main body 151 of the fork 150 and the shaft support 152 are fixed by insert molding, screwing, caulking or the like. Since the shaft support 152 is made of a synthetic resin, no noise is generated when the shaft support 152 is rotated with respect to the support shaft 142.
[0058]
The main body 151 of the fork 150 extends forward of the shaft support 152 so that its longitudinal direction is parallel to the direction in which the support shaft 142 and the belt 113 extend. The main body 151 sandwiches the belt 113 between a pair of parallel wall portions 151a at its tip. The parallel wall 151a extends in parallel with the main body 151, and also keeps each other parallel. The parallel wall 151a is separated from the shaft support 152 by a predetermined distance or more.
[0059]
A knob-shaped operation unit 152a is protruded from an upper portion of the shaft support 152. The operation section 152a projects outward from a window 75a formed in the rear projection 75 of the suction opening body 70. The point at which the operating part 152a hits one end of the window 75a corresponds to one rotation limit of the shaft support 152, and the point at which the operation part 152a hits the contact provided at the other end of the window 75a corresponds to the other rotation of the shaft support 152. It is the limit. That is, the operation unit 152a and the window 75a constitute stopper means 153 that determines the rotation limit of the fork 150. As for the contact at the window 75a, the operation unit 152a may hit the side shell 73 or hit the frame 141.
[0060]
A toggle spring (not shown) is arranged between the shaft support 152 and the frame 141. This toggle spring is also formed of a torsion coil spring similarly to the toggle spring 133, and one end is engaged with the shaft support 152 and the other end is engaged with the frame 141, so that the angle conversion of the shaft support 152 is sharply performed.
[0061]
A lever 154 projects radially from the left side surface of the shaft support 152. On the left side surface of the frame 141, a lever 155 is supported by a support shaft 156 so as to be rotatable in a vertical plane. A slit 155 a provided in one arm of the lever 155 engages with the lever 154. The other arm of the lever 155 also has a slit 155b. The longitudinal direction of the slits 155a and 135b matches the direction in which the lever 155 itself extends.
[0062]
The suction port switching device 90 and the belt switching device 120 are connected by the interlocking means 160. The main part of the interlocking means 160 is a crank 161 formed by bending a steel rod or steel pipe into a substantially U-shape. The crank 161 is rotatably supported by the pair of left and right bearings 162 inside the suction opening 70 so as to be rotatable around a horizontal axis. One end 161 a of the crank 161 is engaged with the slit 132 c of the lever 132 on the side of the suction port switching device 90. The other end 161b of the crank 161 engages with the slit 155b of the lever 155 on the side of the belt changing device 120. Like the lever 132, the lever 155 is also a component of the interlocking means 160.
[0063]
The cleaner body 10 is sandwiched between the U-shaped suction ports 70 as described above, and a suction port switching device 90 is disposed on one side of the suction port 70, and a belt switching device is provided on the other side. With the configuration in which the suction port switching device 120 is disposed, a predetermined portion of the suction port switching device 90 and the belt hooking device 120 can be disposed so as to overlap the left and right sides of the cleaner body 10, and the size of the suction port body 70, particularly, the size in the front-rear direction is reduced. be able to.
[0064]
Next, the operation of the vacuum cleaner 1 will be described. When the vacuum cleaner 1 is not in use, that is, during storage, the dust collector holding unit 12 is in an upright state as shown in FIG. 4, and the cleaner body 10 is separated from the floor by two wheels 64 and support legs 65. It is supported at four points above. In the suction port body 70, the second ground support section 102 serves as a support for the suction port body 70, and the first ground support section 101 is raised from the floor. The agitator 110 is also out of contact with the floor.
[0065]
When using the vacuum cleaner 1, extend the cord (not shown), connect it to a power outlet, hold the handle 62 with one hand, tilt the dust collector holding unit 12 as shown in FIG. 12, and change the posture to the cleaning work posture. I do. Then, the cleaner body 10 acts like a lever. That is, the handle 62 is the leverage point, the wheel 64 is the leverage point, the support shaft 14 and the drive shaft 15 (the cylindrical support shaft outside the drive shaft 15) are leverage points, and the support shaft 14 and the drive shaft 15 ( The cylindrical support shaft outside the drive shaft 15 raises the rear part of the suction port body 70. The support leg 65 is separated from the floor.
[0066]
When the cleaner main body 10 is tilted until the height of the handle 62 becomes about 60 to 80 cm from the floor, the second ground support portion 102 separates from the floor and has a first suction port 81 and a second suction port 82. The front portion of the bottom plate 80 is substantially parallel to the floor. Then, the first ground support 101 and the agitator 110 come into contact with the floor (see FIG. 5). 60-80 cm is the height of the handle 62 when an average-sized adult pushes or pulls the vacuum cleaner 1 for cleaning work.
[0067]
In this state, the degree of protrusion of the first ground support 101 is adjusted and set so that the height (H _{1 in} FIG. 5) of the entrance of the second suction port 82 from the floor becomes 0.8 to 2 mm. . The second suction port 82 approaches the floor up to this distance (0.8 to 2 mm), but here, the first ground support 101 hits the floor, and does not approach any further.
[0068]
Here, a predetermined switch of the operation panel section 61 is operated to drive the electric blower 13. The electric blower 13 applies a suction force to the suction port body 70 from the suction port 13 a through the second ventilation path 32, the dust collector 20, and the first ventilation path 31.
[0069]
When the suction port switching device 90 has selected the first suction port 81, airflow is sucked from the first suction port 81. If the suction port switching device 90 has selected the second suction port 82, airflow is sucked from the second suction port 82. In a state where the first suction port 81 is selected, the belt changing device 120 causes the belt 113 to hang on the driving pulley 112. Therefore, the agitator 110 is driven by the drive of the electric blower 13.
[0070]
Hereinafter, the description will be given on the assumption that the first suction port 81 is selected by the suction port switching device 90. The rotating agitator 110 lifts dust from the floor or a floor covering. When the agitator 110 is rotated on a soft flooring (for example, a carpet having a bristle length of 4 to 20 mm), the first ground support 101 sinks into the soft flooring. For this reason, the agitator 110 and the first suction port 81 approach the soft floor material, and the dust is drawn out and sucked strongly. If a limit is added to the width of the first grounding support portion 101 as viewed from the front (for example, the total frontal width of the first grounding support portion 101 is set to be equal to or less than half the width of the first suction port 81, or The width of each of the ground support portions 101 is set to 10 to 20 mm), and the sinking of the first ground support portion 101 into the soft floor material is ensured.
[0071]
As described above, on the carpet, the first ground support 101 sinks into the hair of the carpet, and the front portion of the bottom plate 80 supports the suction opening 70. Therefore, operability on the carpet is ensured. When the distance (G _{1 in} FIG. 5) between the outer periphery of the agitator 110 and the trailing edge of the first suction port 81 is 5 to 10 mm, operability and suction performance are compatible.
[0072]
The height from the floor to the tip of the guide portion 103 (H _{2 in} FIG. 5) is about 3 mm (3 to 4.5 mm) from the height from the floor to the entrance of the second suction port 82 (H _{1 in} FIG. 5). Since the height is high, the dust on the carpet is not removed even when the front portion of the bottom plate 80 hits the carpet. In the case of rice-sized garbage, the guide portion 103 rides over the garbage and invites it to the first suction port 81. In order to ensure the performance of getting over dust, the slope of the slope 104 should not exceed 40 to 50 ° with respect to the horizontal plane.
[0073]
The dust agitated by the agitator 110 enters the inflow port 92 of the suction port switching device 90 together with the airflow flowing from the first suction port 81, passes through the connecting pipe 78 from the suction port switching device 90, and passes through the first ventilation path. Enter 31. The airflow passing through the first ventilation path 31 enters the centrifugal separation chamber 23 from the inlet 25 of the dust collector 20.
[0074]
The airflow flowing from the inlet 25 turns around the exhaust pipe 26 at high speed. Dust in the airflow is separated from the airflow by centrifugal force and accumulates at the bottom of the dust cup 21. The swirling airflow from which the dust has been separated is sucked into the exhaust pipe 26 and passes through the exhaust chamber 24. The dust that has not been centrifuged is filtered by the filter 28. The airflow that has flowed into the exhaust chamber 24 flows out of the outlet 30.
[0075]
The airflow swirling in the centrifugal separation chamber 23 swirls not only around the exhaust stack 26 but also around the stabilizer 29. At this time, when the airflow collides with the wings of the stabilizer 29, dust in the airflow separates from the airflow and falls to the bottom of the dust cup 21. If the suction of the dust is continued, the dust lump grows from the bottom of the dust cup 21. The stabilizer 29 suppresses the movement of the dust lump, and prevents the dust from rising again.
[0076]
The airflow that has exited the dust collector 20 enters the second ventilation path 32. The second ventilation path 32 is connected to the suction port 13a of the electric blower 13 in substantially the same plane, and the air flow goes straight to the suction port 13a without being blocked or obstructed by anything. Since the hollow part itself of the dust collecting device holding part 12 forms the second ventilation path 32, it can be a large-area ventilation path, and the airflow distribution efficiency is also improved in this respect.
[0077]
The airflow sucked into the electric blower 13 is discharged to the exhaust space 50 and enters the pedestal portion 16. Fine dust not filtered by the filter 28 is filtered by the filter 51. Thereafter, the airflow is exhausted from the exhaust port 54.
[0078]
While the electric blower 13 is driven, the belt 113 runs. The running belt 113 cannot be prevented from coming into contact with the fork 150 at all. However, the belt 113 comes into contact with the parallel wall 151a of the metal main body 151. Therefore, it is inevitable that the temperature of the main body 151 rises due to frictional heat, but unlike a synthetic resin molded product, the main body 151 is not damaged by overheating. Resistant to wear. Further, since the parallel wall portion 151a is separated from the shaft support portion 152 by a predetermined distance or more, heat is radiated at a portion of the main body 151 located between the parallel wall portion 151a and the shaft support portion 152, and the shaft support portion 152 which is a synthetic resin molded product. No excessive frictional heat is transmitted from the parallel wall portion 151a.
[0079]
When cleaning a corner of the room, the pedal 134 is operated to switch the suction port switching device 90 to the second suction port 82. That is, the switching valve 95 opens the inflow port 92 and closes the inflow port 93, but the inflow port 93 is opened and the inflow port 92 is closed. At this time, the valve shaft 96 rotates counterclockwise (direction of arrow A) in FIG. Then, the lever 132 raises the end 161 a of the crank 161, and the entire crank 161 rotates clockwise (the direction of arrow B) in the bearing 162. With this movement, the other end 161b of the crank 161 raises the front of the lever 155. The rear part of the lever 155 is reversed and pushes down the lever 154. As a result, the fork 150 rotates around the axis of the support shaft 142. The rotation direction is a counterclockwise direction (arrow C direction) when viewed from the front.
[0080]
When the fork 150 rotates counterclockwise when viewed from the front, the parallel wall portion 151a moves from left to right in an arc having a radius equal to the distance from the center of the support shaft 121. With this movement, the belt 113 is switched from the drive pulley 112 to the idler 114. The fork 150 rotates around an axis parallel to the extension direction of the belt 113, and the fork 150 is not a mechanism for amplifying the vibration at the parallel wall portion 151a at the tip, so that the movement of the belt 113 is always stable. Further, since the rotation limit of the fork 150 is determined by the stopper means 153, the belt 113 is properly positioned at a predetermined position.
[0081]
Also, no matter how much the shaft support 152 is rotated, the parallel wall 151a is kept parallel to the extension direction of the belt 113. Therefore, the deformation (twist, twist) of the belt 113 is small. This means that the parallel wall 151a and the belt 113 are less damaged.
[0082]
When the electric blower 13 is stopped and the drive shaft 15 is not rotating, the switching is not complete, but once the drive of the electric blower 13 is started, the belt 113 completely moves onto the idler 114. The same is true when the belt 113 is switched from the idler 114 to the drive pulley 112.
[0083]
Switching from the first suction port 81 to the second suction port 82 is also possible by operating the operation unit 152a. That is, when the first suction port 81 is used, the operation unit 152a is located at the right end of the window 75a. When the operation unit 152a is moved to the left end of the window 75a, the fork 150 rotates counterclockwise when viewed from the front, and the belt 113 is switched from the drive pulley 112 to the idler 114. At the same time, the lever 154 is lowered, and the rear part of the lever 155 is pushed down. The front part of the lever 155 rises and lifts the end 161b of the crank 161. The entire crank 161 rotates in the bearing 162 in the direction opposite to the arrow B, and the other end 161 a of the crank 161 raises the longer arm of the lever 132. As a result, the valve shaft 96 rotates in the direction opposite to the arrow A, and the switching valve 95 moves to a position where the inlet 93 is opened and the inlet 92 is closed.
[0084]
In the case of performing dust suction using the second suction port 2, on a hard floor, the first ground support 101 stably stabilizes the distance between the entrance of the second suction port 82 and the floor to a predetermined value (0). 0.8-2 mm). Therefore, a path for dust is secured between the second suction port 82 and the floor. The opening area of the second suction port 82 is smaller than that of the first suction port 81, and the suction force is concentrated on a narrow portion. Accordingly, a high-speed suction airflow is generated at the entrance of the second suction port 82, and a stronger suction force is exerted on the dust than in the suction method involving rotation of the agitator. By setting the gap to 0.8 to 2 mm, dust and powder-like dust can be efficiently sucked.
[0085]
When using the second inlet 82, the inhaled airflow passes under a transparent or translucent lid 86. Therefore, the status of dust suction can be directly visually confirmed. When dust is clogged in the second suction passage 85, the lid 86 can be removed to remove the dust causing the clogging.
[0086]
It is not only the first suction port 81 and the second suction port 82 that can be used for sucking dust. A flexible hose 33 can also be used. If the flexible hose 33 is pulled out of the connecting pipe 78 and a suction tool such as a clearance nozzle or a furniture brush is attached to the end of the flexible hose 33, it is possible to clean a narrow place or a high place where the suction opening 70 is difficult to reach.
[0087]
When the cleaning operation is completed, the vacuum cleaner 1 is carried to a storage place when not in use, and the cleaner main body 10 is brought into a storage posture. That is, the dust collector holding unit 12 is set upright. Then, the rear portion of the suction port body 70 is lowered, and the second ground support section 102 hits the floor to support the suction port body 70, and the first ground support section 101 rises from the floor. The outer periphery of the agitator 110 also rises from the floor. Therefore, even if the electric blower 13 is still driving at this point, the agitator 110 does not rub the floor and does not damage the floor.
[0088]
As long as the dust collector holding unit 12 is kept upright, the outer periphery of the agitator 110 does not touch the floor. Therefore, even if it is left as it is for a long time, the bristles (or a thin piece of rubber or a soft synthetic resin) planted in the agitator 110 do not deform.
[0089]
When a large amount of dust is accumulated in the dust collecting device 20, the latch 43 is released, the dust collecting device 20 is pulled out, and the dust inside is discarded. If necessary, the filter 28 is also cleaned. Then, the dust collecting device 20 is set as before. If the dust cup 21 is formed of a transparent or translucent material, it is easy to check the degree of accumulation of dust.
[0090]
The widths of the second suction port 82 and the suction passage 85 may be increased to the limit. That is, the widths of the second suction port 82 and the suction passage 85 (the inlet portion) are increased to a point where only the left and right side walls of the suction port body 70 remain. Although the strength of the suction port body 70 is slightly reduced, the suction width of the second suction port 82 is increased, which leads to a further improvement in suction force.
[0091]
FIG. 10 is a cross-sectional view of a suction port main body 201 according to another example of the present embodiment, which is cut from a front center and viewed from a side. FIG. 11 is a view of the inlet main body 201 as viewed from above, and illustrates the state of the separate inlet 202 with the lid 203 removed for easy understanding. As shown in these drawings, a roller 205 serving as a support is provided on both sides around another suction port 202 in front of the suction port 204.
[0092]
The roller 205 is rotatably attached to a back cover 207 of the suction port main body 201 by a roller shaft 206 which is a shaft support portion. Reference numeral 208 denotes a rotating brush, 209 denotes a partition wall, and 210 denotes a concentration port located at the back of the following passage. The partition wall 209 separates a separate suction port passage 211 extending from the separate suction port 202 and a suction port passage 214 extending from the suction port 204. In addition, a bumper 216 made of, for example, a soft synthetic resin is attached from the front surface to the left and right side surfaces of the suction port main body 201. Although not shown here, a kind of the above-described suction port switching device 90 for switching and using the suction port is disposed inside the suction port main body 201.
[0093]
Further, a thick partition wall 212 is provided at the center in the left-right direction of the suction port main body 201 in order to make the thickness direction distance of the separate suction port passage 211 smaller than the left and right sides. Thereby, the spatial distance in the thickness direction of the separate suction port passage 211b connected to the concentration port 210 from the left and right sides in front is larger than that of the separate suction port passage 211a at the center of the separate suction port passage 211. .
[0094]
Therefore, the ratio of the ventilation amount is such that the separate suction port passage 211b is larger than the separate suction port passage 211a, and even if the width of the separate suction port 202 is smaller than the width of the suction main body 201, the left and right sides of the front side are different. The suction force increases, and suction can be reliably performed over the entire width of the suction port main body 201. Since the remaining width of the suction port main body 201 can be used as the reinforcing portion 213, the suction port main body 201 having high impact strength while maintaining the suction performance can be obtained.
[0095]
The reinforcing portion 213 is a portion in front of the side shells 72 and 73 provided on the left and right of the flat box-shaped central shell 71. The rear portions of the side shells 72 and 73 project rearward from the central shell 71 to form rear projecting portions 74 and 75. The suction port main body 201 has a U-shaped planar shape as a whole, and receives the cleaner main body 10 between the rear protruding portions 74 and 75.
[0096]
Further, since the partition wall 215 on the side of the inlet passage 214 is linear in the left-right direction, the ventilation state of the inlet passage 214 can be set irrespective of a change in the thickness direction of the separate inlet passage 211. Thus, the purpose of use of the suction port 204 and the separate suction port 202 can be freely set, for example, for floors, carpets, and the like, and the suction port main body 201 in which each suction port matches the suction purpose can be easily formed. Obtainable. In addition, the external appearance of the suction port main body 201 on the side of another suction port 211 can be made a smooth surface without unevenness even with a single thickness, and the suction port main body 201 has a stable design. .
[0097]
Further, since the separate suction port passages 211a and 211b are set so that the concentration port 210 side is larger or the same in the thickness direction than the separate suction port 202 side, the separate suction port passage 211 has The possibility of trash clogging is reduced. In addition, since the ventilation volume is adjusted by varying the distance in the thickness direction of the passage, the passage becomes a single open space and there are no obstacles, so it is possible to adjust the ventilation volume with little loss and further improve the suction performance Can be achieved.
[0098]
In addition, the portion where the spatial distance in the thickness direction of the passage changes is not a vertical surface or the like, but if it is gradually changed so as to be an inclined surface, adjustment loss is further reduced, In addition, since the air flow has a small swirl, the cleaner has a lower noise. Further, if the minimum spatial distance in the thickness direction of the separate suction port 202 or the separate suction port passage 211 is set to, for example, 6 mm or more, it becomes difficult for paper shredder to be clogged by the shredder.
[0099]
Further, as described above, an adjusting means (here, a partition wall) for adjusting the amount of airflow at a predetermined position of the separate suction port 202 is provided in another suction port passage 211 which is a passage passing from the front to the top of the suction port passage 214. Since 212) is provided, the ventilation amount can be gradually and smoothly adjusted even in a long area of the passage, the ventilation amount can be adjusted with less loss, and the suction performance can be further improved. However, such an adjusting means is not limited to the separate inlet passage 211, but may be provided in the inlet passage 214 or both.
[0100]
In the above description, the ventilation amount of the separate intake passage 211 is adjusted on the partition wall 212 side, but the ventilation amount may be adjusted by adjusting the spatial distance in the thickness direction of the passage from the lid 203 side. However, in this case, if the outer portion of the lid 203 is formed to have a shape without irregularities by protruding only the side of the other suction port passage 211 side of the lid 203 to increase the thickness, the weight of the lid 203 increases and the It is difficult to see how the dust flows in the passage by making it transparent, and this leads to a decrease in detachability and functionality. Further, it is also possible to adjust the amount of ventilation by combining each of the partition wall 212 and the lid 203.
[0101]
Although the adjusting means for adjusting the air flow rate has been described in which the spatial distance in the thickness direction of the corresponding passage differs at a predetermined position, the present invention is not limited to this. For example, although the ventilation resistance is slightly increased by the adjusting means, a guide plate for adjusting the ventilation amount is provided in the corresponding passage in accordance with the ventilation path, or the opening at a predetermined position at the center side of the suction port is 10 mm. The degree may be blocked. As a specific example of the former, a guide plate along the boundary between the separate suction port passage 211a and the separate suction port passage 211b in FIG.
[0102]
In the embodiments described so far, the suction port 204 corresponds to the first suction port 81, and the other suction port 202 corresponds to the second suction port 82. Further, the suction passage 214 corresponds to the suction passage 83, the separate suction passage 211 corresponds to the suction passage 85, the concentration opening 210 corresponds to the outlet 87, and the rotating brush 208 corresponds to the agitator 110.
[0103]
【The invention's effect】
As described above, according to the present invention, a plurality of suction ports are provided in a suction port body, and each of the suction ports can be selectively used according to each cleaning on a plurality of floor surfaces. A vacuum cleaner can be provided.
[0104]
Specifically, by providing a plurality of suction ports, suction characteristics according to different applications can be set in one suction port main body, and the amount of ventilation at a predetermined position of the suction port is adjusted. By providing the adjusting means in the passage, the wind speed at each position of the suction port communicating with the passage can be made uniform, and the suction can be performed uniformly, and the suction performance is improved.
[0105]
In addition, if the air volume at the left and right ends is set to be increased, dust can be sucked up to the left and right end regions of the suction port main body even if the suction port cannot be provided to the left and right ends of the suction port main body. As a result, the suction performance of the suction port main body is improved.
[0106]
In addition, an adjusting means for adjusting the amount of ventilation at a predetermined position of the other suction port is provided in another suction port passage passing upward from the front of the suction port passage. Can be adjusted, and the ventilation amount can be adjusted with less loss, so that the suction performance can be improved.
[0107]
In addition, in order to adjust the ventilation amount by adjusting the ventilation amount in a predetermined position at different positions in the thickness direction of the passage at a predetermined position, in addition to adjusting the ventilation amount in a suction passage or a separate suction passage in which the ventilation process can be set relatively long. Is one communicating space, and there is no obstacle, so that the ventilation amount can be adjusted with little loss, and the suction performance can be further improved.
[0108]
In addition, the ventilation volume on both sides of the suction port main body increases, so that the suction port can be set to a width smaller than the width of the suction port main body, and the remaining width of the suction port main body can be used as a reinforcing portion. Therefore, a suction port main body having impact strength can be obtained.
[0109]
Further, since the partition wall on the side of the suction passage is linear in the left-right direction, the ventilation state of the suction passage can be set irrespective of a change in another suction passage. Thereby, the purpose of use of the suction port and the separate suction port can be freely set, and a suction port main body in which each suction port matches the purpose of suction can be easily obtained. In addition, the appearance of the suction port body on the side of another suction port passage can be made smooth without any irregularities, so that the suction port body having a sense of stability in design can be obtained.
[0110]
Also, by providing a concentration port on a side (rear side) different from the suction port side of the suction port passage so that the concentration port side is larger or the same in the thickness direction of the passage than the suction port side, A suction port main body with less dust clogging in each suction path is obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view of a vacuum cleaner according to a first embodiment of the present invention.
FIG. 2 is a vertical sectional view of the vacuum cleaner.
FIG. 3 is a partial horizontal sectional view of a vacuum cleaner main body of the vacuum cleaner.
FIG. 4 is a side view of the vacuum cleaner, in which a portion of a suction port body is sectioned.
FIG. 5 is a partially enlarged cross-sectional view of the suction port body in a state different from that of FIG. 4;
FIG. 6 is a perspective view of the suction port switching device.
FIG. 7 is an exploded perspective view of the suction port switching device.
FIG. 8 is a perspective view of an internal mechanism of the suction port body.
FIG. 9 is a perspective view of a part of the internal mechanism of the suction port body, viewed from a direction different from FIG. 8;
FIG. 10 is a cross-sectional view of the front center of the suction port main body, viewed from the side.
FIG. 11 is a view of the suction port main body as viewed from above.
FIG. 12 is a side view showing a use state of the vacuum cleaner, in which a portion of a suction port body is sectioned.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vacuum cleaner 10 Vacuum cleaner main body 11 Blower housing 12 Dust collecting device holding part 13 Electric blower 14 Support shaft 15 Drive shaft 20 Dust collecting device 62 Handle 64 Wheel 70 Suction port body 71 Central shells 72, 73 Side shells 74, 75 Rear projecting portion 81 First suction port 82 Second suction port 90 Suction port switching device 95 Switching valve 96 Valve shaft 110 Agitator 111 Driving pulley 112 Driving pulley 113 Belt 114 Idler 120 Belt switching device 132 Lever 160 Interlocking means 201 Suction Mouth body 202 Separate suction port 203 Lid 204 Suction port 205 Roller 206 Roller shaft 207 Back cover 208 Rotating brush 209 Partition wall 210 Concentration port 211 Separate suction port passage 212 Partition wall 213 Reinforcement portion 214 Suction port passage 215 Partition wall 216 Bumper

Claims (6)

In a vacuum cleaner, which sucks dust together with the airflow generated by the operation of the electric blower from the suction port of the suction port main body and introduces the sucked airflow into the dust collecting device to collect dust.
A plurality of suction ports are provided in the suction port main body, and at least one of the suction port passages communicating with each of the plurality of suction ports is provided with an adjusting means for adjusting a ventilation amount at a predetermined position of the suction port. An electric vacuum cleaner characterized by the above. The vacuum cleaner according to claim 1, further comprising a suction port switching device that switches and uses the plurality of suction ports. The vacuum cleaner according to claim 1, wherein the adjusting unit changes a spatial distance in a thickness direction of the suction port passage provided with the adjusting unit at a predetermined position. 4. The vacuum cleaner according to claim 3, wherein a spatial distance in a thickness direction of a portion of the suction port passage extending from the left and right sides of the suction port to the back side is larger than other portions. 5. 4. The partition wall between the suction port passage provided with the adjusting means and the suction port passage adjacent thereto is such that the partition wall surface on the side of the adjacent suction port passage is linear in the left-right direction. Or the vacuum cleaner according to claim 4. The vacuum cleaner according to any one of claims 3 to 5, wherein a depth of the suction passage on the back side of the suction passage is larger or equal in a thickness direction.

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