JP2006026019A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that special trouble of masking an exhaust vent with an exhaust filter etc. having gas permeability and given a sound proof effect from inside is required for preventing making of uncomfortable noise and direct discharging of exhaust caused by the direct leakage of sound generated from a blower to the outside and for preventing winding up of surrounding dust due to the high speed of exhaust, in a vacuum cleaner with the exhaust vent formed at its wheel part. <P>SOLUTION: The vacuum cleaner is provided with: an air current changing means 38a for changing the direction of an air current by collision of the exhaust air current of the blower with the wheel part 36; and the exhaust vent 38 for discharging the exhaust which collides with the air current changing means 38a to change the direction of the air current. Thus, the speed of the exhaust from the blower is reduced to suppress the sound of the exhaust to low. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vacuum cleaner having an improved exhaust port.

A conventional vacuum cleaner is provided with cylindrical shaft portions on both sides of a main body case that houses an electric blower, and the shaft portion has a wheel portion that closes the tip in the axial direction. There is an exhaust port on the exhaust side of the blower that communicates with the outside air, and an annular wheel portion is rotatably provided on the outer periphery of the shaft so that the exhaust air from the electric blower can be exhausted from the exhaust port ( For example, see Patent Document 1).
JP 2001-241865 A (Pages 2 to 4, FIGS. 1 to 3)

  However, since the exhaust port provided in the conventional wheel unit as described above is an exhaust port formed by a hole through which the exhaust airflow directly passes from the exhaust side of the internal electric blower to the external outside air side, The generated sound leaks directly to the outside and becomes unpleasant noise.In addition, since the exhaust is directly emitted, the exhaust wind speed is large, the surrounding dust is wound up, the inside such as the internal electric blower and cord reel can be seen, There was a problem that a finger etc. entered from the outside to the inside. Therefore, in order to prevent these problems, it is necessary to blindly cover the exhaust port with an exhaust filter or the like that has air permeability from the inside and is provided with a silencing effect.

The present invention has been made to solve the above-described problems, and an electric vacuum cleaner that can reduce the exhaust air speed from the electric blower and keep the exhaust sound low without performing blindfolding from the inside. The purpose is to obtain.
It is another object of the present invention to provide a vacuum cleaner that cannot be looked into from the outside without performing blindfolding or the like from the inside and in which a finger or the like cannot be inserted.
Moreover, it aims at obtaining the vacuum cleaner which improved the usability.

  The electric vacuum cleaner of the present invention has traveling wheels on both sides of a vacuum cleaner main body including a dust collecting portion and an exhaust portion having an electric blower, and the electric blower from an exhaust port provided in the wheel portion of the traveling wheel. A vacuum cleaner that discharges the exhaust air of the electric blower, and the airflow change means that changes the airflow direction when the exhaust airflow of the electric blower collides with the wheel portion, and the exhaust that has changed the airflow direction after the collision with the airflow change means. An exhaust port for discharging is provided.

  The vacuum cleaner of the present invention is provided with an airflow changing means that changes the airflow direction when the exhaust airflow of the electric blower collides with the wheel portion, and discharges the exhaust gas that has collided with the airflow changing means and changed the airflow direction. Since the exhaust port is provided, the exhaust air speed from the electric blower can be reduced and the exhaust noise can be kept low.

Embodiment 1 FIG.
1 to 10 are views showing the electric vacuum cleaner according to Embodiment 1 of the present invention, and FIG. 1 is a perspective view showing an appearance of the electric vacuum cleaner in use.
In FIG. 1, the present vacuum cleaner has a vacuum cleaner body 1, a hose 6 connected to the vacuum cleaner body 1, an extension pipe 9 connected to the hose 6, a suction tool 10 attached to the tip of the extension pipe 9, and the like. .

The vacuum cleaner body 1 is surrounded by an upper case 2, a lower case 3, an upper lid that can be opened and closed, and the like has a case shape, and is a traveling wheel on the rear side of the traveling direction at the side of the case. The rear wheel 5 and the bottom of the case have a front wheel 15 on the front side in the traveling direction (hereinafter referred to as the front side and the rear side with respect to the traveling direction of the cleaner body 1).
Further, inside the case, there are a dust collecting portion 17 (shown in FIG. 5 described later), an exhaust portion provided with an electric blower (not shown), and the like.
The hose 6 connected to the vacuum cleaner main body 1 is a bellows-like tube, has a hose insertion portion 7 at one end and a hose proximal portion 8 at the other end, and the hose insertion portion 7 at one end is connected to the vacuum cleaner main body 1. It is inserted and fixed to the suction port 14 on the front side. Further, one end portion of the extension pipe 9 is inserted and connected to the hose proximal portion 8 at the other end.
A suction part 10 is attached to the tip of the extension pipe 9.

  This vacuum cleaner generates negative pressure in the dust collecting part 17 by an electric blower built in the vacuum cleaner main body 1 and sucks dust from the suction tool 10, and in the case of a cyclone structure, a dust box, In the dust bag structure, the dust is separated and collected by the dust bag, and the separated air is discharged as exhaust from an exhaust port 38 (shown in FIG. 10 described later) formed in the rear wheel 5 described later in detail.

Hereinafter, the characteristic structure of the vacuum cleaner will be described in detail with reference to FIGS.
FIG. 2 is a perspective view showing the main body of the vacuum cleaner and the hose for inserting the insertion portion into the suction port, and FIG. 3 is a cross-sectional view showing a connection state in which the insertion portion of the hose is connected to the main body of the vacuum cleaner. FIG. 4 is a diagram for explaining a use state of a vacuum cleaner to which a hose is connected.
The vacuum cleaner body 1 and the hose 6 form a suction air passage for the electric blower by inserting and fixing and connecting the hose insertion portion 7 of the hose 6 to the suction port 14 of the vacuum cleaner body 1. Electrical connection with the vacuum cleaner body 1 is also made.
That is, the hose insertion portion 7 includes a vacuum cleaner body 1 and a latch portion 11 for fixing the fitting, a signal transmission pin 12 for electrical connection with the vacuum cleaner body 1 by connection, and the same. A pin 12 for transmitting power to the brush rotational power in the suction tool 10 is provided. Then, at the time of connection, as shown in FIG. 2, the latch part 11 is installed so as to be on the upper part of the hose insertion part 7, and both the pins 12 are installed separately on the left and right sides of the hose insertion part 7. .

Thus, by adopting a triangle structure in which the latch portion 11 is installed at the upper portion of the hose insertion portion 7 and the pins 12 are respectively installed on the left and right sides, the hose difference between the hose 6 and the suction port 14 of the vacuum cleaner main body 1 is achieved. When the insertion portion 7 is inserted, the direction in which the user connects can be easily grasped.
In addition, since the latch portion 11 is located at the top when attaching and detaching, it is easy to see and easy to use.
Moreover, since the height in the vicinity of the connection portion of the vacuum cleaner body 1 was lowered while the above triangle structure was adopted, a handle 13 for lifting the vacuum cleaner body 1 was provided below the connection portion as shown in FIG. It becomes possible to form.
Furthermore, as shown in FIG. 4, since the latch part 11 is at the upper part, even when the vacuum cleaner main body 1 comes into contact with furniture such as a chair foot during use of the vacuum cleaner, the latch part 11 remains on the side part. The latch part 11 is pushed by mistake like the case where there exists in, and the fitting with the vacuum cleaner main body 1 and the hose insertion part 7 is not cancelled | released.

FIG. 5 is a perspective view showing an external appearance of the electric vacuum cleaner main body, and FIG. 6 is a perspective view showing a state in which the upper cover of the electric vacuum cleaner main body is opened.
A central portion of the upper lid 14 covering the internal dust collecting portion 17 forms a transparent window 16 with transparent plastic or the like. With this transparent window 16, the internal dust collecting portion 17 can be observed without opening the upper lid 14.
Further, on the rear side of the dust collecting unit 17, an operation display unit that displays an operation state including an explanation display unit 20 and a display lamp unit 21 is provided on a partition wall above the exhaust unit provided with the electric blower. For example, the explanation display unit 20 forms a display of “filter”, “power”, and “ion” by silk printing or the like. Further, a display lamp unit 21 provided with a lamp is formed corresponding to each display of the explanation display unit 20. The “filter” of the explanation display unit 20 indicates a clogged state of the filter provided between the dust collecting unit and the exhaust unit. When the filter is clogged and needs cleaning, the corresponding lamp of the display lamp unit 21 is displayed. Lights up and displays. Similarly, “power” displays an analog display of the power level in use, strong, medium, and weak. “Ion” indicates whether the attached negative ion generator is on or off, and the corresponding lamp is turned on when the ion is on.
Similarly, the explanation display unit 20 and the display lamp unit 21 can be observed without opening the top cover 14 and are convenient, and the display on the explanation display unit 20 is less exposed to the outside and may be rubbed and become unreadable. Disappears.

If the dust collecting unit 17 is a cyclone cleaner, a dust box with a built-in cyclone structure is contained, and if it is a paper pack cleaner, a paper pack is contained. In either case, the upper lid 4 is closed. From the transparent window 17, the amount of dust can be confirmed.
The power plug 24 can be pulled out arbitrarily by the user, and when the cord button 25 is pressed, the pulled-out power plug 24 can be taken up.
Moreover, the vacuum cleaner main body 1 can be lifted and carried by the handle 22.

FIG. 7 is a cross-sectional view of main parts showing a state in which the upper cover of the vacuum cleaner main body is closed, and FIGS. 8 and 9 are cross-sectional views of main parts showing a state in which the upper cover is similarly opened.
As shown in these drawings, the upper lid 4 is opened and closed by the rotating portion 29. With the upper lid 4 closed, the upper case 2 in the vicinity of the rear end portion of the upper lid 4 is connected to the rear end portion of the upper lid 4 and the upper lid. The shielding rib 27 that closes the gap with the case 2 is projected to the rear end. The shielding rib 27 forms a protrusion having a low height on the upper case 2 along the rear end portion of the upper lid 4 so as to close the gap formed along the rear end portion of the upper lid 4.
By providing the shielding rib 27, it is possible to prevent a finger or the like from being caught in the vicinity of the rear end portion of the upper lid 4.
Moreover, in order to form the rotation part 29 of the upper cover 4, although the opening 31 is formed in the upper case 2 of the vacuum cleaner main body 1 by the relationship of a metal mold | die, by providing the shielding rib 27, it is from the opening 31. Exhaust and noise can be shielded.

10 is a view showing the rear wheel, FIG. 10 (a) is a front view of the rear wheel, and FIG. 10 (b) is an exhaust port provided in the wheel portion of the rear wheel in FIG. 10 (a). FIG. 10C is a cross-sectional view taken along the line BB of the exhaust port of FIG. 10A.
The rear wheel 5 has a substantially disc-shaped wheel portion 36 having a wheel portion 37 integrally formed on the outer peripheral portion, and an exhaust port 38 provided on the plate surface of the wheel portion 36 for discharging the exhaust from the electric blower to the outside. The airflow changing plate 38 a formed on the inner surface side of the wheel portion 36, the cylindrical shaft portion 35 provided at the center of the wheel portion 36, and the like. And this cylindrical shaft part 35 is fitted in the bearing provided in the side part of the case of the vacuum cleaner main body 1, and the wheel part 36 and the wheel part 37 rotate integrally. Further, an opening communicating with the exhaust part inside the vacuum cleaner main body 1 is provided in a part facing the wheel part 36 on the side part of the case, and the exhaust airflow from the electric blower installed in the exhaust part is Flows to the inner side.

The exhaust port 38 is a plurality of openings appropriately provided in the wheel portion 36. In FIG. 10, twelve rectangular openings are provided, but each of the openings has an opening shape when viewed from the front of the opening. The airflow changing plate 38a, which is a corresponding plate of the same shape, is immediately followed. That is, as shown in FIG. 10C, the airflow changing plate 38 a is a bottom portion of a U-shaped body formed in a U-shaped cross section, and the wheel portion 36 corresponds to the opening of the plate surface of the wheel portion 36. Surfaces are formed on the inner surface side of the wheel portion 36 in parallel with each other. This airflow changing plate 38a is an airflow changing means.
The wheel portion 36 provided with a plurality of exhaust ports 38 with such airflow changing plates 38a has an exterior shape of an armored door structure that has an opening when the wheel portion 36 is viewed from the outside, but the inside is not directly visible. .
By providing such an exhaust port 38 and an airflow change plate 38a, the exhaust air exhausted from the electric blower flows toward the wheel portion 36, but is not directly exhausted from the exhaust port 38. It collides with the airflow changing plate 38a in the flow path and changes the direction of the airflow, that is, wraps around the airflow changing plate 38a and is exhausted to the outside through the exhaust port 38.

  Therefore, the exhaust airflow from the electric blower is not exhausted directly from the exhaust port 38, but first collides with the airflow changing plate 38a and is exhausted around, thereby reducing the wind speed of the exhaust air and reducing the exhaust noise. Moreover, it becomes difficult to see the internal structure from the outside, and insertion of a finger or the like can be prevented. In particular, these effects can be obtained without providing an exhaust filter for silencing or blinding inside.

Embodiment 2. FIG.
The vacuum cleaner of the second embodiment is the same as that of the first embodiment in the exhaust port 38 provided in the wheel portion 36 of the rear wheel 5 in the vacuum cleaner of the first embodiment. In this case, another armor door structure that has an opening but cannot directly see the inside is applied, and the other structure and the operation and effect thereof are the same as those of the electric vacuum cleaner of the first embodiment. Hereinafter, differences will be mainly described.
FIG. 11 is a perspective view showing a rear wheel of the main body 1 of the vacuum cleaner, and FIG. 12 is a cross-sectional view of the rear wheel of FIG.
The rear wheel is composed of the shaft portion 35, the wheel portion 36, and the wheel portion 37 in the same manner as the rear wheel 5 of the first embodiment, but the structure of the exhaust port 39 of the wheel portion 36 and the airflow changing means. Is different.

A plurality of diagonal ribs 39a that turn radially from the central part coupled to the shaft part 35 to the wheel part 37 on the outer peripheral side and extend radially are arranged in parallel on the wheel part 36 over the entire surface. The oblique rib 39a has a substantially swirling blade shape, is a plate-like body that is slightly convex on the outside in the short direction and slightly concave on the inside, and extends in a radial direction by turning right in FIG. It connects with the wheel part 37 of an outer peripheral side in the edge part of a extending | stretching direction (longitudinal direction). The oblique rib 39a is an airflow changing means.
Further, the plate surface of the oblique rib 39a has an end portion on the opposite side to the turning direction of the oblique rib 39a adjacent to the turning direction (the end portion on the right side in FIG. 11) on the turning direction side in the short direction. 11 is provided with a predetermined interval in the direction of the exhaust airflow before the collision from the left end portion of the head 11 and forming an inclined surface that inclines in the short direction so as to be outside (outside in FIG. 11). ing.
The wheel portion 36 is formed entirely by such a plurality of oblique ribs 39a except for the central portion.

Further, the opening of the wheel portion 36 is formed between the adjacent both end portions, and the both end portions substantially coincide with each other in plan (they coincide with each other so that there is no gap when viewed from the outside in the plan view of FIG. 11). ) Is arranged as follows.
Therefore, the openings formed in the longitudinal direction at both ends of the oblique rib 39a in the longitudinal direction serve as the exhaust port 39, and the exhaust port 39 is located on the right side in the longitudinal direction of the oblique rib 39a from the central portion toward the outer peripheral side. It turns and is formed radially.

  By forming the exhaust port 39 in this way, the exhaust air exhausted from the electric blower flows toward the wheel portion 36, but is not directly exhausted from the exhaust port 39, and once enters the air flow path. It collides with the inner surface of a certain oblique rib 39a. And this diagonal rib 39a collided with the inner surface of the diagonal rib 39a by inclining in a transversal direction so that the edge part of the transversal direction may become outside the edge part of the right side of adjacent FIG. The exhaust air changes the air flow direction to the right and is exhausted to the outside from the right exhaust port 39a.

Therefore, the exhaust airflow from the electric blower is not exhausted directly from the exhaust port 39, but first collides with the oblique rib 39a, changes the airflow direction along the inclination of the inner surface, and is exhausted from the exhaust port 39. The wind speed of the air is reduced and the exhaust noise is reduced. Further, the internal structure is difficult to see from the outside without providing a blindfold or the like inside, and insertion of a finger or the like can be prevented.
In addition, the oblique rib 39a is inclined in the short direction so that the right end in FIG. 11 is outside the left end of the adjacent oblique rib 39a on the right side, and the exhaust air after the collision with this inner surface is The exhaust port 39a on the right side, that is, the rotation direction of the rear wheel 5 is the left rotation indicated by the arrow in FIG. By exhausting from 39 to the outside, the rear wheel 5 is applied with rotational force in the traveling direction, and has the effect of reducing the routing of the vacuum cleaner main body 1 in use.
Furthermore, the exhaust port 39 is turned in a direction opposite to the rotation direction of the rear wheel 5 to be radially formed, so that the rotational force applied in the traveling direction of the rear wheel 5 during use of the vacuum cleaner is made uniform.

Regarding the armor door structure of the wheel portion 36 described in the first and second embodiments, several modifications are possible in addition to the above description.
Regarding the armor door structure of the first embodiment, the airflow changing plate 38a is not necessarily a plate-like body having the same shape as the opening forming the exhaust port 38, and may be a plate-like body larger than the opening. It is good also as a plate-shaped body of the size which combined three openings arranged in parallel, or one size larger than this. In other words, any plan view of the rear wheel in FIG. 10 may be used as long as the inside is not directly visible when viewed from the outside.

Moreover, regarding the armor door structure of the second embodiment, a long body may be used instead of the oblique rib 39a, and the longitudinal direction may be aligned without being swung, and may be arranged radially in parallel from the center to the outer peripheral side. At this time, if the right end portion is inclined so as to be outside the left end portion of the adjacent right elongated body, the rear wheel 5 can be applied with rotational force in the traveling direction, but the exhaust noise is reduced. In order to achieve this, the outer and inner sides may be alternately spaced in the airflow direction between the adjacent elongated bodies without being inclined.
Further, in order to reduce the exhaust noise, it is only necessary to align the longitudinal direction without arranging the elongated bodies radially.
Further, the adjacent end portions may overlap.
Furthermore, the oblique ribs 39a and the elongated bodies that form the airflow changing means may be provided on a part of the plate surface of the wheel portion 36 as appropriate.
The armor door structure of the wheel portion 36 is provided on at least one of the wheel portions 36 of the rear wheel 5.

It is a perspective view which shows the external appearance of the vacuum cleaner in the use condition of Embodiment 1 of this invention. It is a perspective view which shows the vacuum cleaner main body of Embodiment 1 of this invention, and the hose which inserts an insertion part in the suction inlet. It is sectional drawing which shows the connection state which connected the insertion part of the hose to the vacuum cleaner main body of Embodiment 1 of this invention. It is a figure explaining a use condition by connecting a hose to the vacuum cleaner of Embodiment 1 of the present invention. It is a perspective view which shows the external appearance of the vacuum cleaner main body of Embodiment 1 of this invention. It is a perspective view which shows the state which opened the upper cover of the vacuum cleaner main body of Embodiment 1 of this invention. It is principal part sectional drawing which shows the state which closed the upper cover of the vacuum cleaner main body of Embodiment 1 of this invention. It is principal part sectional drawing which shows the state which opened the upper cover of the vacuum cleaner main body of Embodiment 1 of this invention. It is principal part sectional drawing which shows the state which further opened the upper cover of FIG. It is a front view which shows the rear wheel of the vacuum cleaner main body of Embodiment 1 of this invention. It is a perspective view which shows the rear wheel of the vacuum cleaner main body of Embodiment 2 of this invention. It is sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body, 2 Upper case, 4 Upper lid, 5 Traveling wheel, 6 Hose, 7 Hose insertion part, 10 Suction tool, 11 Latch part, 12 Pin, 14 Suction port, 17 Dust collection part, 20, 21 Display part, 27 Shielding rib, 36 Wheel part, 38, 39 Exhaust port, 38a, 39a Air flow changing means, 39a Long body.

Claims (7)

An electric vacuum cleaner having a traveling wheel on both sides of a vacuum cleaner body incorporating a dust collecting portion and an exhaust portion having an electric blower, and exhausting the exhaust of the electric blower from an exhaust port provided in the wheel portion of the traveling wheel In
The wheel portion is provided with an airflow changing means for changing an airflow direction when the exhaust airflow of the electric blower collides, and an exhaust port for discharging the exhausted air with the airflow direction changed after the collision with the airflow changing means. Characterized vacuum cleaner.   The air flow changing means is a plate-like body whose surface is substantially parallel to the plate surface of the wheel portion, and is opposed to an opening provided on the plate surface of the wheel portion, with an interval therebetween, and the inner surface side of the wheel portion The electric vacuum cleaner according to claim 1, wherein the electric vacuum cleaner is provided.   The air flow changing means is arranged in parallel with the longitudinal direction to form a plate surface of the wheel portion, and both end portions in the adjacent short side direction have a predetermined interval in the exhaust air flow direction before the collision. The electric vacuum cleaner according to claim 1, wherein the electric vacuum cleaner is an elongated body disposed so as to form an exhaust port. The elongated body is substantially in the shape of a rotating blade, and is arranged radially from the central part of the wheel part to the outer peripheral side, turning in the direction opposite to the rotational direction of the traveling wheel on which the vacuum cleaner body travels. ,
Further, the long-shaped body has an end on the swiveling direction side in the short direction thereof, and an end on the opposite side to the swiveling direction in the short direction of the long-shaped body disposed adjacent to the swiveling direction side. It is arranged at a predetermined interval in the exhaust airflow direction before the collision so as to be outside,
Further, the elongated body changes the exhaust airflow to the exhaust ports formed at the predetermined intervals by the inclination of the inner surface when the exhaust airflow of the electric blower collides with the inner surface of the elongated body. The electric vacuum cleaner according to claim 3.   The hose insertion part, which is a connecting part of a hose that is inserted and connected to the suction port of the front part of the vacuum cleaner body, is electrically connected to the vacuum cleaner body and the latch part for fitting and fixing, and the vacuum cleaner body. 5. The device according to claim 1, wherein a plurality of pins for connection are provided, and the latch portion is arranged at an upper portion and the plurality of pins are divided into left and right at the time of connection. Electric vacuum cleaner.   An openable lid that has a transparent window and covers the dust collecting part of the main body of the electric vacuum cleaner, and a partition wall behind the dust collecting part and above the exhaust wall provided with the electric blower in the upper cover. The electric vacuum cleaner according to any one of claims 1 to 5, further comprising an operation display unit that displays an operation state. An openable and closable upper lid that covers the dust collecting portion of the electric vacuum cleaner body is provided, and a shielding rib that closes a gap between the rear end portion of the upper lid and the upper case is provided on the upper case near the rear end portion of the upper lid. The vacuum cleaner according to any one of claims 1 to 6, wherein the vacuum cleaner is provided.

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