JP6088786B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner including a cyclone dust collection unit that can be attached to and detached from a vacuum cleaner body.

  A vacuum cleaner that houses a cyclone dust collector in the vacuum cleaner body, and includes a packing for connecting the main body suction port, which is a suction hose insertion port, and the air inlet to the cyclone dust collection unit. The connection packing is known to be formed in a polygonal shape such that the opening area of the circular opening corresponding to the main body suction port is equal to or larger than the cross-sectional area of the connection hose (for example, Patent Document 1). reference).

  The above-mentioned packing for connection is arranged on the cleaner body side of the main body suction port. Since it is desired to reduce the size of the vacuum cleaner body, the parts placed inside the vacuum cleaner body have severe dimensional constraints, and the dimensional constraints are not necessarily the same in the vertical and horizontal directions, but are often different. It is intended to make the best use of the space in which the connection packing can be arranged in a polygonal shape. The connection packing is, for example, a rectangular shape whose longitudinal and lateral sides are longer than the outer diameter of the suction hose (see FIG. 1 of Patent Document 1).

JP 2004-202073 A

  The connection packing is formed of an elastic member such as rubber in order to perform reliable sealing. That is, the opening and the outer edge having different shapes are connected and sealed by the elastic member. Since pressure is applied to the portion connecting the opening and the outer edge during the suction operation, the connecting packing is required to have a strength that can withstand the pressure. In addition, if a strong pressure is applied, such as when the tip of the suction hose is blocked, the part that connects the opening of the connecting packing and the outer edge may vibrate and generate abnormal noise. It is necessary to determine the strength. As a result, the packing must be formed with a corresponding thickness. Where it is desired to reduce the weight of the vacuum cleaner body, thick rubber packing is not preferable.

In addition, the cyclone type dust collection unit smoothly generates a swirling airflow for performing centrifugal separation, so that the cyclone type dust collection unit extends from the inlet to the inside of the dust cup along the tangential direction in the vicinity of the inner side wall of the bottomed cylindrical dust cup. Allow air containing dust to flow in. To meet this purpose, the end face of the inlet usually has a vertically long shape along the side wall. On the other hand, the main body suction port is a circular opening according to the shape of the suction hose. In order to suppress pressure loss and wind noise, a funnel-shaped connection packing whose cross-sectional shape gradually changes from a circular shape on the main body suction port side to a rectangular shape on the dust collection unit side is desirable. Conflicts with
The present invention has been made in view of the above circumstances, and provides a vacuum cleaner that can achieve a good sealing performance between the suction hose and the main body suction port while realizing a reduction in size and weight of the main body of the vacuum cleaner. To do.

  The present invention includes a main body suction port for sucking air containing dust, a cyclone dust collecting unit having a polygonal cross-section inlet, and a vacuum cleaner main body including a relay duct for communicating the main body suction port with the inlet, A suction hose portion including a suction hose having a circular cross section and a connection portion that is detachably connected to the main body suction port at one end of the suction hose, and the main body suction port is similar to the inflow port. It is a polygonal opening, and the connecting portion is formed in a circular shape on the end surface connected to the suction hose portion, and the other end surface is formed in a polygonal shape corresponding to the main body suction port. To provide a vacuum cleaner.

In the vacuum cleaner according to the present invention, the main body suction port is a rectangular opening, and the connection portion has a circular end surface connected to the suction hose portion, and is connected to the main body suction port. Since the end face of the tube is formed in a rectangular shape, there is no need to arrange a packing for connection that changes the cross-sectional shape in the vacuum cleaner body, and the suction hose and the suction port of the main body are excellent while realizing a reduction in size and weight of the vacuum cleaner body. Sealability is obtained.
That is, since the main body suction port has the same rectangular cross section as the inlet of the dust collecting unit, it is not necessary to use a packing for connection. Therefore, there is no possibility that abnormal noise is generated due to vibration of the connecting packing.

1 is an external perspective view of a vacuum cleaner according to an embodiment of the present invention. It is a top view of the cleaner body concerning an embodiment of this invention. It is a side view of the cleaner body concerning an embodiment of this invention. It is a 1st disassembled perspective view of the cleaner body concerning an embodiment of this invention (the circumference of a bogie and a wheel). It is a 2nd disassembled perspective view of the vacuum cleaner main body which concerns on embodiment of this invention (electric blower periphery). It is a 3rd disassembled perspective view of the vacuum cleaner main body which concerns on embodiment of this invention (duct periphery). It is a 4th disassembled perspective view of the cleaner main body which concerns on embodiment of this invention (code reel periphery). It is AA arrow sectional drawing of FIG. It is AA arrow sectional drawing of the state in which the dust collection unit was removed. It is AA arrow sectional drawing of the state in which the dust collection unit was removed. 1 is an external perspective view of a dust collection unit according to an embodiment of the present invention. It is AA arrow sectional drawing shown in FIG. 2 of the dust collection unit which concerns on embodiment of this invention. It is explanatory drawing which shows the flow path of the airflow in the cleaner body shown in FIG. It is the side view which looked at the vacuum cleaner which concerns on embodiment of this invention from the front. It is the side view of the main body suction opening vicinity which looked at the cleaner body which concerns on embodiment of this invention from the front. It is an external appearance perspective view of the connection part which concerns on embodiment of this invention. It is an external appearance perspective view of the connection part seen from the direction different from FIG. It is sectional drawing of the connection part which concerns on embodiment of this invention. It is AA arrow sectional drawing of FIG. It is BB arrow sectional drawing of FIG. It is CC sectional view taken on the line of FIG. It is DD sectional view taken on the line of FIG. It is EE arrow sectional drawing of FIG. It is FF arrow sectional drawing of FIG. It is an external appearance perspective view which shows the different aspect of the cleaner body which concerns on embodiment of this invention. It is CC arrow sectional drawing of the state which connected the connection part to the cleaner body of FIG. It is an external appearance perspective view of the connection part corresponding to the cleaner body of FIG. 25 and FIG. It is the external appearance perspective view of the connection part seen from the direction different from FIG.

  Hereinafter, the present invention will be described in more detail with reference to the drawings. In addition, the following description is an illustration in all the points, Comprising: It should not be interpreted as limiting this invention.

[Overall description of the vacuum cleaner]
FIG. 1 is an external perspective view of a vacuum cleaner according to an embodiment of the present invention, and FIGS. 2 and 3 are a plan view and a side view of a vacuum cleaner body of the vacuum cleaner shown in FIG.

  As shown in these drawings, the vacuum cleaner 1 includes a vacuum cleaner body 100 in which a cyclone type dust collection unit 500 is detachably incorporated, and a suction hose portion 300.

  The suction hose part 300 includes a suction hose 301, an extension pipe 302, a suction part 303 connected to the tip of the extension pipe 302, a hand handle 304, an operation part 305 attached to the hand handle 304, and a connection part 306. Is provided.

  The suction hose 301 is detachably connected to the front of the cleaner main body 100 via the connection portion 306, and the user holds the hand handle 304 by hand while bringing the suction portion 303 at the tip of the extension pipe 302 into contact with the floor surface. Can be moved.

  Since the vacuum cleaner main body 100 is provided with a pair of ring-shaped wheels 140 on both sides and a free wheel 117 at the lower front, when the user moves while holding the hand handle 304 by hand, The operation can be followed.

  The vacuum cleaner main body 100 sucks dust on the floor together with air from the suction portion 303 to the dust collecting unit 500 via the extension pipe 302 and the suction hose 301.

  The user visually checks the dust collection status of the dust collection unit 500 inside the vacuum cleaner main body 100 from the central opening 141 of the ring-shaped wheel main body 110, and pulls out the dust collection unit 500 from the upper part of the vacuum cleaner main body 100 as appropriate. Dust collected in the unit 500 can be discarded.

  As shown in FIG. 2, a power cord insertion plug 131 of a cord reel (described later) and a brake button 132 for adjusting the length of the power cord are provided on the upper rear portion of the vacuum cleaner main body 100. .

  Further, since the cleaner body 100 includes the hand handle 115, the user can hold the hand handle 115 and lift and transport the cleaner body 100.

  4 to 7 are exploded perspective views of the cleaner body 100, FIG. 8 is a cross-sectional view taken along arrow AA in FIG. 2, and FIG. 9 corresponds to FIG. 8 in a state where the dust collection unit 500 is removed from the cleaner body 100. 10 and 10 are cross-sectional views taken along line BB in FIG. The configuration of the cleaner body 100 will be described with reference to these drawings.

  The vacuum cleaner main body 100 has an elongated cart 101 (see FIG. 4) constituting a lower portion thereof, and a lower first casing 102 (see FIG. 5) that is installed in front of the cart 101 and accommodates the electric blower 106 (see FIG. 5). See). Further, a second housing 103 (see FIG. 4) that constitutes a dust collection chamber 150 installed in the center of the carriage 101 to accommodate the dust collection unit 500, and a cord reel 108 installed in the rear of the carriage. A third housing 107 (see FIG. 7) is provided. An exhaust port 133 is formed in the third housing 107.

  The electric blower 106 (see FIG. 5 and FIG. 8) is installed in the lower first housing 102 via a pedestal 122 (see FIG. 5) so that the rotation axis direction, that is, the blowing direction is directed in the direction of gravity. . A lower first housing cover 104 and a duct 105 shown in FIG. 6 are mounted on the lower first housing 102.

  The lower first housing cover 104 (see FIG. 6) includes a horizontal relay duct 104a and a vertical relay duct 104b on the upper surface. The duct 105 is provided to connect the outflow duct 571 (see FIG. 11) of the dust collection unit 500 to the vertical relay duct 104b (see FIG. 6) via the packing 124.

  The vertical relay duct 104 b is provided to connect the duct 105 to the electric blower 106. Packings 125 and 126 are respectively attached to the entrances and exits of the lateral relay duct 104a (see FIG. 6).

  The horizontal relay duct 104a is used to connect the connecting portion 306 (see FIGS. 1, 3 and 10) of the suction hose portion 300 to the inlet 503 (see FIG. 11) of the dust collecting unit 500 via the packings 125 and 126. Is provided.

As a result, the flow path from the connection part 306 of the suction hose part 300 to the inlet 503 of the dust collection unit 500 through the horizontal relay duct 104a, the duct 105 and the vertical relay duct 104b from the outflow duct 571 of the dust collection unit 500 are connected. A flow path to the electric blower 106 is formed. The opening of the lateral relay duct 104a on the side where the packing 126 is disposed corresponds to the main body suction port 139.
Further, the inlet of the duct 105 connected to the outlet from the outlet duct 571 of the dust collecting unit 500 and the inlet of the horizontal relay duct 104a from the connecting part 306 of the suction hose part 300 are formed on the same surface side. . This is because the dust collection unit 500 is likely to be stable because the inlet is pulled in the same direction by the suction force of the electric blower 106 when cleaning.
A terminal portion 104c (see FIG. 6) for connecting a terminal (not shown) of the connecting portion 306 to the cleaner body 100 is provided on a side surface of the horizontal relay duct 104a and is covered with a terminal cover 123 from the outside. The printed wiring board 120 of the vacuum cleaner main body 100 and the operation unit 305 of the suction hose unit 300 are connected by wiring via the terminal and the terminal unit 104c.

  The lower first housing 102 includes a wiring board case 102a (see FIGS. 5 and 8) extending rearward. A printed wiring board 120 is accommodated in the wiring board case 102a, and a case bottom plate 119 is mounted. As shown in FIG. 5, the lower first housing 102 includes a filter 121 inserted between the electric blower 106 and the printed wiring board 120. The filter 121 is a resin porous plate.

  The lower first housing 102 (see FIG. 5) configured as described above is fixed to the front of the carriage 101, and the upper first housing 114 (see FIG. 6) having a hand handle 115 is mounted thereon. .

  On the other hand, the second casing 103 (see FIG. 4) installed in the center of the carriage 101 includes an upper opening 103a at the top, windows 103b on both sides, and a ring-shaped window frame 103c around the window 103b. .

  In addition, a lower flow path 138 (see FIG. 8) is formed between the bottom of the second housing 103 and the carriage 101 for flowing the air flow discharged from the electric blower 106 toward the third housing 107. Is done.

  Behind the carriage 101 are provided a cord reel 108 (see FIG. 7) for winding a power cord (not shown) so that it can be pulled out, and cord reel support plates 127, 128 for rotatably supporting the cord reel 108. They are covered by the third casing 107 (see FIG. 7).

  The third housing 107 accommodates the cord reel 108 so that the reel axis is parallel to the longitudinal direction of the carriage 101. Further, the third housing 107 includes an exhaust port 133 for discharging an air flow generated by the electric blower 106 and flowing through the lower flow path 138 to the rear of the cleaner body 100 via the cord reel 108. As a result, the power cord wound around the cord reel 108 is cooled when energized.

  A pair of arc-shaped reinforcing beams 109 shown in FIG. 4 are fixed to the carriage 101 so as to be coupled to the upper half of the ring-shaped window frame 103a of the second housing 103, and as shown in FIG. The first housing 114 and the third housing 107 are connected. As a result, the longitudinal rigidity of the cleaner body 100 is reinforced. The pair of reinforcing beams 109 together with the lower second housing 103 form a dust collection chamber 150 that houses the dust collection unit 500.

  Then, as shown in FIG. 4, a ring-shaped wheel 140, that is, a ring-shaped wheel guide 111, a ring-shaped wheel body 110, a ring-shaped wheel cover 112, and a circle from both sides of the semicircular arc-shaped reinforcing beam 109 and the carriage 101. An arcuate decorative cover 113 is attached.

  As shown in FIGS. 8 to 10, the dust collecting unit 500 is disposed between the pair of reinforcing beams 109 from above the cleaner body 100 with respect to the cleaner body 100 configured in this manner. It is loaded into the second casing 103 through the upper opening 103a (see FIG. 4).

The free wheel 117 is provided at a position directly below the electric blower 106 so as to be rotatable and turnable on the outer bottom surface of the carriage 101 via a free frame 116 (see FIG. 4).
Thus, the electric blower 106 is in front, the center of gravity is forward, and the free wheel 117 is also provided on the lower side of the electric blower 106, so that the front of the cleaner main body 100 can be prevented from floating when cleaning. The movement of the vacuum cleaner main body 100 due to the pulling of the suction hose 301 can be easily followed.

  Thus, in the vacuum cleaner main body 100, the electric blower 106, the dust collection unit 500, and the cord reel 108 are arranged in a line in the longitudinal direction from the front of the carriage 101 (the connection side of the suction hose part 300), and the flow path is Since they are provided above and below them, the width of the vacuum cleaner main body 100 is minimized.

  FIG. 11 is an external perspective view of the dust collection unit 500. 12 is a cross-sectional view of the dust collection unit 500 taken along the line AA in FIG. The dust collection unit 500 includes a cup cover unit 570, a filter unit 550, an inner cylinder unit 530, and a bottomed cylindrical dust cup 501.

  The dust cup 501 is formed of a transparent or translucent resin so that the dust collection state is visible from the outside. As shown in FIG. 11, an inflow port 503 into which an air flow from the suction hose unit 300 (see FIG. 1) flows is provided on the front peripheral surface of the dust cup 501.

Referring to FIG. 10, the connection portion 306 of the suction hose portion 300 is bent from the center of the cleaner body 100 so that air flows straight into the inner circumferential surface of the cylindrical dust cup 501 from its tangential direction. doing.
Referring to FIG. 12, the inner cylinder unit 530 includes an upper cup cover 537 that houses the filter unit 550, a lower dust partition 535, and an inner cylinder 533 that connects between them. An opening is formed at the bottom of the cup cover 537 to which the inner cylinder 533 is connected. A slit-like outlet 533b is formed around the inner cylinder 533, and a mesh-like filter (not shown) is disposed at the outlet 533b. The dust partition 535 includes a flange portion 535 a having an outer diameter larger than that of the inner tube 533, a large-diameter tube portion 535 b surrounding the outer periphery of the flange portion, and a small-diameter tube portion 535 c whose lower end is in contact with the bottom center portion of the dust cup 501.

  When the electric blower 106 is operated, the air flow flows straight into the dust cup 501 in the circumferential tangent direction via the connecting portion 306 and the lateral relay duct 104a, and forms a high-speed swirling air flow in the dust cup 501.

Thereby, the dust contained in the airflow is centrifuged. Since the dust collecting unit 500 is installed so that the central axis of the swirling airflow to be formed faces the direction of gravity, the heavy dust among the centrifugally separated dust is accumulated below the flange portion 535a by the action of gravity. .
Here, the center axis of the swirling airflow of the dust collection unit 500 being directed in the direction of gravity does not require the center axis of the swirling airflow to be directly below, and the dust collection unit 500 is directed to the cleaner body 100 in the vertical direction. It only has to be arranged.

  A light thing is filtered with the mesh-like filter arrange | positioned in the outflow port 533b with an air flow. In addition, minute dust rises in the inner cylinder 533 through the outlet 533b and is filtered by the filter unit 550. The filter unit 550 includes a pleated filter in which a peak portion and a valley portion are continuous. The filtered air flow is sucked into the electric blower 106 through the outflow duct 571.

FIG. 13 is an explanatory view showing airflow paths in the cleaner body 100 shown in FIG.
As shown in the figure, the air flow from the suction hose 301 flows into the dust collection unit 500 through the connection portion 306 and above the electric blower 106.

  The inflowing air flow becomes a swirl flow in the dust cup 501 of the dust collection unit 500. After the dust collection is centrifuged, the air flow rises in the inner cylinder 533, passes through the filter unit 550, passes through the electric blower 106, and is below the dust collection unit 500 in the vertical direction of the carriage 101. Enters the lower flow path 138 formed in The swivel axis is slightly tilted rearward with respect to the vertical direction. When viewed from the side as shown in FIG. 13, the flow path flowing into the dust cup 501 from the connection portion 306 is substantially orthogonal to the pivot axis.

  The air flow passes through the wiring board case 102 a installed in the lower flow path 138 while cooling the printed wiring board 120, and then is distributed through the cord reel 108. The dispersed air flow is discharged to the outside from an exhaust port 133 provided on the back surface of the third housing 107.

  Therefore, the noise that tries to go out from the electric blower 106 in the air flow is attenuated by the long lower flow path 138 formed in the vertical direction of the carriage 101 below the dust collection unit 500, and the lower flow path. It is dispersed and absorbed by the wiring board case 102 a in 138 and the cord reel 108 in the third housing 107. Thereby, the noise of the electric blower 106 going out from the cleaner body 100 is effectively reduced.

  Further, as shown in FIG. 13, the flow path of the air flow is provided separately at the upper part and the lower part of the cleaner body 100 and is not provided at the side surface portion, so the lateral width of the cleaner body 100 is minimized. ing.

[Configuration of suction hose connection part]
The structure of the suction port of the cleaner body and the connection part of the suction hose will be described.
FIG. 14: is the side view which looked at the vacuum cleaner which concerns on embodiment of this invention from the front. As shown in FIG. 14, the vacuum cleaner main body 100 has an upper first housing 114 in front of a carriage 101 sandwiched between left and right ring-shaped wheel main bodies 110, and a suction hose at the front end of the upper first housing 114. The connection unit 306 of the unit 300 is connected. An attachment / detachment button 307b is provided on the left side as viewed from the front of the connection portion 306. When the attach / detach button 307b is pressed, the suction hose part 300 and the cleaner body 100 are disengaged and the suction hose part 300 can be removed.

A suction hose 301 extending forward is connected to the center of the connection portion 306. The suction hose 301 extends forward from the left and right centers of the cleaner body 100.
The left side pipe cover 306c that covers the end of the suction hose 301 and is attached with the attach / detach button 307b is exposed on the left side surface as viewed from the front of the connecting portion 306.

  The right side pipe cover that covers the end portion of the suction hose 301 and the main body side connection pipe (not shown in FIG. 14) is exposed on the right side surface as viewed from the front of the connection portion 306. The main body side connection pipe and the suction hose side connection pipe, which will be described later, constitute a connection pipe that connects the suction hose 301 at the left and right central portions of the cleaner body to the lateral relay duct 104a located to the right from the center.

  FIG. 15 is a side view of the vicinity of the main body suction port 139 when the cleaner main body 100 is viewed from the front. As shown in FIG. 15, when the cleaner main body 100 is viewed from the front, a part of the lower first housing cover 104 is exposed at the back of the opening of the upper first housing 114. A rectangular opening of the horizontal relay duct 104a is provided at a position on the right side of the lower housing cover 104, and a rectangular frame packing 126 is disposed on the edge of the opening. Further, there is a terminal portion 104c on the right side of the opening. The terminal part 104c is fitted with four terminals on the suction hose part 300 side. As a modification, the cross-sectional shape of the horizontal relay duct 104a may be a rounded rectangular shape, and the packing 126 may be a rounded rectangular frame shape. In this case, the cross-sectional shape of the inflow port 503 may be a rounded rectangular shape and the packing 125 may be a rounded rectangular frame shape, but the cross-sectional shape of the inflow port 503 may be a rectangular shape and the packing 125 may be a rectangular frame shape. Good. In other words, the cross-sectional shape may be slightly converted by the horizontal relay duct 104a.

  FIG. 16 is an external perspective view of the connecting portion 306. 17 is an external perspective view of the connecting portion 306 viewed from a direction different from that in FIG. 16 is a diagram viewed from the diagonally upper left side, and FIG. 17 is a diagram viewed from the diagonally upper right side. 18 is a horizontal sectional view of the connecting portion 306, FIG. 19 is a sectional view taken along the line AA in FIG. 18, FIG. 20 is a sectional view taken along the line BB in FIG. 18, and FIG. It is C arrow sectional drawing. 22 is a cross-sectional view taken along the line DD in FIG. 18, FIG. 23 is a cross-sectional view taken along the line EE in FIG. 18, and FIG. 24 is a cross-sectional view taken along the line FF in FIG.

  As shown in FIG. 18, the attach / detach button 307b is formed as a latch member 307 integral with a latch portion 307a that can engage with the upper first housing 114, and the latch member 307 is separated from the left pipe cover 306c by a compression spring 308. It is biased in the protruding direction. By this urging, the engagement between the latch portion 307a and the upper first housing 114 is maintained, and when the detachable button 307b is pushed against the urging, the engagement is released.

  Further, one end of the hose side connection pipe 306a is inserted into the end portion of the suction hose 301, and the outside is covered with the left pipe cover 306c and the right pipe cover 306d. The other end of the hose side connection pipe 306a is connected to the main body side connection pipe 306b. The main body side connection pipe 306b extends obliquely in a direction in which the right pipe cover 306d is located, and then is bent so as to extend in parallel with the main body side connection pipe 306b. Four terminals 309 that fit into the terminal portion 104c of the cleaner body 100 are disposed between the main body side connection pipe 306b and the right pipe cover 306d at the distal end.

  As shown in FIG. 10, the front end of the main body side connection pipe 306 b is connected to the horizontal relay duct 104 a via the packing 126 when the main body side connection pipe 306 b is attached to the cleaner main body 100. The airflow that has passed through the suction hose 301 is swung to the right at the connecting portion 306 and then proceeds to the rear, and proceeds straight to the rear as it is, and is guided to the inlet 503 of the dust collecting unit 500 through the packing 126, the lateral relay duct 104a, and the packing 125. . Since the inflow port 503 is along the tangential direction of the cylindrical side wall portion of the dust cup 501, the airflow entering the dust cup 501 from the inflow port 503 becomes a swirling airflow along the side wall portion, and the dust is centrifuged.

  Since the suction hose 301 is connected to the front of the central part in the left-right direction of the cleaner body 100, the cleaner body 100 is smoothly pulled by the suction hose part 300. Further, since the flow path of the airflow is brought closer to the side of the cleaner body 100 at the connection portion 306, the lateral relay duct 104a can be arranged short on the side of the cleaner body 100 with severe dimensional constraints. Further, the airflow can be smoothly introduced along the tangential direction of the side wall portion of the dust cup 501. When the airflow flowing out from the dust collection unit 500 descends the front vertical relay duct 104b and is guided to an electric blower (not shown), the horizontal relay duct 104a is disposed on the side, so that sufficient space is secured in the vertical relay duct 104b. can do.

Further, the hose side connection pipe 306a and the main body side connection pipe 306b of the connection portion 306 have a circular cross-sectional shape at the end portion on the suction hose 301 side, and a rectangular end portion on the side connected to the lateral relay duct 104a. The hose side connection pipe 306a and the main body side connection pipe 306b are formed so that the cross-sectional shape of the flow path gradually changes from a circular shape to a rectangular shape (see FIGS. 19 to 24).
The cross section of the end connected to the horizontal relay duct 104a has almost the same shape as the cross section of the horizontal relay duct 104a. Since the packing 126 for keeping the airtightness between the main body side connecting pipe 306b and the horizontal relay duct 104a is sandwiched between both ends of substantially the same shape, it may be a rectangular thin frame.

  As described above, when the connection portion 306 is attached to the cleaner body 100, the latch portion 307a engages with the upper first housing 114, and the connection portion 306 and the cleaner body 100 are fixed. However, for example, it is preferable that the fixing is stably maintained even when the user lifts the vacuum cleaner 1 by grasping only the connection portion 306. A preferred embodiment from that viewpoint is described below.

25 is an external perspective view of the vacuum cleaner main body 100 showing a preferred embodiment, and FIG. 26 is a cross-sectional view taken along the line CC in a state where the connection portion 306 is connected to the vacuum cleaner main body 100 of FIG. 27 and 28 are external perspective views of the connecting portion 306 corresponding to the cleaner body 100 of FIGS. 25 and 26.
As shown in FIGS. 25 and 26, the upper first housing 114 has a substantially horizontal surface facing the lower surface of the connection portion 306, and a concave portion 142 is formed on the surface. The left and right side wall upper ends of the recess 142 are formed with portions that protrude inward. On the other hand, as shown in FIG. 27, the connection portion 306 is formed with a first locking portion 310 a and a second locking portion 310 b corresponding to the shape of the recess 142. In a state where the connection portion 306 is attached to the cleaner body 100, the first locking portion 310a and the second locking portion 310b engage with the recess 142 (see FIG. 26). By this engagement, the swing of the connecting portion 306 in the vertical direction and the horizontal direction of the cleaner body 100 is restricted. The movement of the connecting portion 306 in the insertion / extraction direction is restricted by the engagement between the latch portion 307a and the upper first housing 114. Therefore, the connection between the connecting portion 306 and the cleaner main body 100 is stably maintained.
As shown in FIG. 28, three protrusions 311 are formed on the surface of the right pipe cover 306d on the opposite side of the attach / detach button 307b. These protrusions 311 are easy to hold when the user grasps and connects / disconnects the connection portion 306 with his / her hand, and prevents the hand from slipping.

  As described above, the electric vacuum cleaner of the present invention includes a main body suction port for sucking air containing dust, a cyclone dust collection unit having an inlet having a polygonal cross section, the main body suction port, and the inlet. A vacuum cleaner main body including a relay duct to be communicated, and a suction hose portion including a suction hose having a circular cross section and a connection portion at one end of the suction hose and detachably connected to the main body suction port, The main body suction port is a polygonal opening similar to the inflow port, and the connection portion has a circular end surface connected to the suction hose portion, and the other end surface of the main body suction port. It is formed in a corresponding polygonal shape.

Furthermore, the preferable aspect of this invention is demonstrated.
The connecting portion may be formed such that a cross section gradually changes from a circular shape to the polygonal shape as it goes from the end portion on the suction hose side to the end portion on the main body suction port side. In this way, pressure loss and wind noise can be suppressed. Also, the cross-sectional shape can be gradually changed on the suction hose side, unlike the cleaner body side, which has severe dimensional constraints.

  Further, the polygon may be a rectangle.

  Further, the relay duct may have a rectangular shape similar to that of the inflow port. If it does in this way, it is not necessary to change cross-sectional shape in the part of a relay duct, and pulling a relay duct contributes to size reduction of a cleaner body.

The relay duct may have a rectangular frame-shaped sealing member at an end on the main body suction port side. If it does in this way, since the said sealing member does not need to change cross-sectional shape like a connection packing, it can reduce in size and weight. Further, there is no possibility that the portion connecting the outer edge and the opening vibrates and generates abnormal noise.
Preferred embodiments of the present invention include combinations of any of the plurality of embodiments shown here.
More specifically, the main body suction port is a polygonal opening to which a suction hose is connected. In the above-described embodiment, the opening of the horizontal relay duct that is on the right side when the cleaner main body is viewed from the front side corresponds to the main body inlet of the present invention.
The relay duct is a pipe that connects the main body suction port and the inlet of the dust collection unit. The horizontal relay duct in the embodiment described above corresponds to the relay duct of the present invention.

According to the present invention, the inflow port has a polygonal cross section, and the main body suction port has a similar polygonal opening. Even if there are some dimensional differences, aspect ratio differences, rounded corners, roundness differences, etc. from the same polygonal shape, for example, if the inlet is a rectangular cross section, the main body suction port is a rectangular opening, If the inlet has an octagonal cross section, it indicates that the main body suction port is an octagonal opening.
The polygon includes all having three or more vertices and includes those having rounded corners. More specifically, for example, in the case of a quadrangle, a rectangle, a parallelogram, and a trapezoid are included. Further, it includes various modes such as a pentagon in which one vertex of a rectangle is cut obliquely and a hexagon in which two vertices are cut obliquely. In this specification, polygons include rounded polygons, but rounded polygons are rounded corners of polygons, and those with curved corners connected by rounding of adjacent corners. Including.

  The connection portion is a portion that engages with the cleaner body and connects one end of the connection hose to the main body suction port. When the user moves with the suction hose, the vacuum cleaner body connected by the connecting portion follows it. The suction hose portion side of the connection portion is circular in conformity with the cross-sectional shape of the suction hose portion, and the main body suction port side is polygonal corresponding to the shape of the main body suction port. That is, the end of the connection portion on the main body suction port side and the main body suction port may have a slight dimensional difference, a difference in aspect ratio, the presence or absence of rounded corners, a difference in roundness, etc. Is also a rectangle, and if one is an octagon, the other is an octagon.

  In addition to the embodiments described above, there can be various modifications of the present invention. These modifications should not be construed as not belonging to the scope of the present invention. The present invention should include the meaning equivalent to the scope of the claims and all modifications within the scope.

DESCRIPTION OF SYMBOLS 1: Electric vacuum cleaner, 100: Vacuum cleaner main body, 101: Carriage, 102: Lower 1st housing | casing, 102a: Wiring board case, 103: 2nd housing | casing, 103a: Upper opening, 103b: Window, 103c: Window frame 104: Lower first housing cover, 104a: Horizontal relay duct, 104b: Vertical relay duct, 104c: Terminal section, 105: Duct, 106: Electric blower, 107: Third housing, 108: Cord reel, 109: Reinforcement beam, 110: Ring-shaped wheel body, 111: Ring-shaped wheel guide, 112: Ring-shaped wheel cover, 113: Arc-shaped decorative cover, 114: Upper first casing, 115: Hand handle, 116: Swivel frame, 117 : Swivel wheel, 119: Case bottom plate, 120: Printed wiring board, 121: Filter, 122: Pedestal, 123: Terminal cover, 124, 125, 126: Packing, 127, 128: Cord reel support plate, 131: Insert plug, 132: Brake button, 133: Exhaust port, 138: Lower flow path, 139: Main body suction port, 140 : Ring-shaped wheel, 141: Center opening, 142: Recess, 150: Dust collection chamber, 300: Suction hose part, 301: Suction hose, 302: Extension pipe, 303: Suction part, 304: Hand handle, 305: Operation part 306: Connection part, 306a: Hose side connection pipe, 306b: Main body side connection pipe, 306c: Left pipe cover, 306d: Right pipe cover, 307: Latch member, 307a: Latch part, 307b: Detachable button, 308 : Compression spring, 309: Terminal, 310a: First locking portion, 31 b: 2nd latching | locking part, 311: Projection part, 500: Dust collection unit, 501: Dust cup, 503: Inlet, 530: Inner cylinder unit, 533: Inner cylinder, 533b: Outlet, 535: Dust partition 535a: flange portion, 535b: large diameter cylindrical portion, 535c: small diameter cylindrical portion, 537: cup cover, 550: filter unit, 570: cup cover unit, 571: outflow duct

Claims (5)

Vacuum cleaner main body including a main body suction port for sucking air containing dust , a cyclone type dust collection unit having a polygonal cross-section inlet and a cylindrical dust cup , and a relay duct for communicating the main body suction port with the inlet When,
Cross section viewed contains a connecting portion that is detachably connected to a one end of the circular suction hose and the suction hose to the main body suction port body side end portion of the suction hose body when it is attached to the body A suction hose portion located in the center of the left and right of
The body suction port, it opens der of the inlet same polygonal shape and suction airflow is arranged biased from the left and right of the center of the body so as to flow tangentially to the circumferential surface of the dust cup,
The connecting portion includes a first bent portion that extends rearward from the main body side end portion of the suction hose in a state of being attached to the main body and then bends toward the suction port; and after passing through the bent portion, A second bent portion that bends forward and backward, the end surface on the side connected to the suction hose portion is formed in a circular shape, and the other end surface is formed in a polygonal shape corresponding to the main body suction port is, vacuum cleaner, characterized in that the cross-section in a path toward the end of the body suction port side is formed so as to change gradually from the circular shape to the polygonal shape from the end of the suction hose side.   2. The vacuum cleaner according to claim 1, wherein the connection portion has an attachment / detachment mechanism that attaches / detaches the suction hose portion from the cleaner body on a side opposite to a side where the path is bent.   The vacuum cleaner according to claim 1, wherein the polygon is a rectangle.   The vacuum cleaner according to claim 3, wherein the relay duct has a cross section having a rectangular shape similar to that of the inflow port.   The vacuum cleaner according to claim 3 or 4, wherein the relay duct has a rectangular frame-shaped sealing member at an end portion on a main body suction port side.