JP6707976B2 - Vacuum cleaner - Google Patents

Description

The present invention relates to a vacuum cleaner.

An electric vacuum cleaner is known in which a hose is connected to an exhaust port that exhausts the air flow generated by an electric blower, and the air flow exhausted through the hose is blown as blow air to blow off dust (for example, , Patent Document 1).

Japanese Patent No. 5636743

In conventional vacuum cleaners, when used to blow out dust with blow air, the air flow inside the air passage may be greatly disturbed due to the reduction or enlargement of the air passage, and blow air may not always be able to be blown out efficiently. ..

The present invention has been made to solve the above problems, and an object of the present invention is to provide an electric vacuum cleaner capable of efficiently blowing out blow air.

An electric vacuum cleaner according to the present invention includes an electric blower, a blow nozzle that blows out an air flow sent by the electric blower , and a tube body that forms an air passage upstream of the blow nozzle. A blow-out part having a blow-out port for blowing out the air flow, and a tubular part upstream of the blow-out part, and the center of the blow-out port is displaced with respect to the extension line of the central axis of the air passage of the tubular part. position near is, the tube was has a bent portion which air passage is bent, the center of the air outlet, extension relative to a position near shall shifted to the outside of the bending of the bending portion.
Further, the electric vacuum cleaner according to the present invention includes an electric blower, a blow nozzle that blows out an air flow sent by the electric blower, a cleaner main body having a built-in electric blower, having a suction port and an exhaust port, and a hose body, A hose having a connecting portion on one end side of the hose body, and the blow nozzle includes a blowout portion having a blowout outlet for blowing out an airflow, and a tubular portion upstream of the blowout portion, The center of the outlet is at a position displaced from the extension of the central axis of the air passage of the tubular part, the connecting part can be connected to both the intake port and the exhaust port, and the blow nozzle is the hose. Can be connected to the exhaust port via.
Further, the electric vacuum cleaner according to the present invention includes an electric blower and a blow nozzle that blows out an air flow delivered by the electric blower. And a tubular portion on the upstream side, the center of the air outlet is at a position displaced from the extension of the central axis of the air passage of the tubular portion, and the air outlet is a virtual plane in contact with the air outlet. It has such a shape that a gap is formed between it and the air outlet.

According to the electric vacuum cleaner of the present invention, since the center of the blowout port of the blow nozzle is located at a position displaced from the extension line of the central axis of the air passage of the tubular portion, blow air can be blown out efficiently. It will be possible.

It is a perspective view which shows the electric vacuum cleaner of Embodiment 1. It is the perspective view which looked at the cleaner body with which the vacuum cleaner of Embodiment 1 is equipped from diagonally behind. It is the perspective view which looked at the cleaner body with which the vacuum cleaner of Embodiment 1 is equipped from diagonally behind. FIG. 3 is a perspective view of a part of a hose, a handle body at hand, and a blow nozzle included in the electric vacuum cleaner according to the first embodiment. FIG. 3 is a perspective view of a part of a hose, a handle body at hand, an extension pipe, and a blow nozzle included in the electric vacuum cleaner according to the first embodiment. It is the perspective view which looked at the blow nozzle with which the vacuum cleaner of Embodiment 1 was equipped from the upper surface side. It is the perspective view which looked at the blow nozzle with which the vacuum cleaner of Embodiment 1 was equipped from the lower surface side. It is a top view of the blow nozzle with which the vacuum cleaner of Embodiment 1 is provided. It is a front view of the blow nozzle with which the vacuum cleaner of Embodiment 1 is provided. It is sectional drawing cut|disconnected in the position of the AA in FIG. It is a side view which shows the state which attached the blow nozzle with which the vacuum cleaner of Embodiment 1 was attached to the handle body at hand. FIG. 4 is a cross-sectional side view showing a state in which the blow nozzle included in the electric vacuum cleaner according to the first embodiment is attached to the handle body at hand.

Hereinafter, embodiments will be described with reference to the drawings. Elements common to each drawing are denoted by the same reference numerals, and overlapping description will be simplified or omitted.

Embodiment 1.
FIG. 1 is a perspective view showing an electric vacuum cleaner 1 according to the first embodiment. FIG. 1 shows a state in which the electric vacuum cleaner 1 is in a form in which it is used for the purpose of sucking dust on the floor surface. The electric vacuum cleaner 1 includes a cleaner body 2, a hose 3, a handle body 4 at hand, an extension tube 5, and a floor suction tool 6. The floor suction device 6 is a portion that takes in dust such as dust on the floor together with air from an opening formed downward. A joint portion 70 connected to the extension pipe 5 is provided at the exhaust-side end of the floor suction tool 6.

The extension pipe 5 has a straight cylindrical shape as a whole. The tip portion of the extension pipe 5 is connected to the joint portion 70 of the floor suction device 6. The proximal end of the extension tube 5 is connected to the handle body 4 at hand. When the user operates the release button 5a provided on the suction side, that is, the tip end side of the extension tube 5, the floor suction tool 6 can be removed from the extension tube 5. When the user operates the expansion/contraction button 5b provided on the exhaust side of the extension pipe 5, that is, on the base end side, the extension pipe 5 can be expanded/contracted.

The hand handle body 4 includes a tube body 4a and a handle 4b. The end portion on the intake side of the tube body 4a, that is, the tip portion is connected to the exhaust side end portion of the extension pipe 5, that is, the base end portion. The handle 4b has an arched outer shape. The hand handle body 4 is a portion that the user holds when cleaning. The hand handle body 4 is a portion that serves as an operation body operated by a user when cleaning. When sucking dust, the user holds the handle 4b of the handle 4 at hand and operates the handle 4 to bring the floor suction tool 6 closer to dust on the floor and suck the dust. .. When the user operates the release button 4c provided on the handle body 4 at hand, the extension tube 5 can be removed from the handle body 4 at hand.

The hose 3 includes a connecting portion 3a and a hose body 3b. The hose body 3b is a flexible, bellows-shaped hollow elongated member. A hard connecting portion 3a is provided on one end side of the hose body 3b, that is, an end portion on the base end side. The connecting portion 3a is detachably connected to the cleaner body 2. The other end, that is, the end on the tip side of the hose body 3b is connected to the end on the exhaust side, that is, the base end of the pipe body 4a of the handle body 4.

The cleaner body 2 includes a suction port 2a, a dust collecting section 2b, an exhaust port 2c, and an electric blower 2d. The suction port 2 a is an opening through which the dust-containing air sucked from the floor suction device 6, that is, the dust-containing air enters the inside of the cleaner body 2. In the state of FIG. 1, the connecting portion 3a of the hose 3 is connected to the suction port 2a. The connecting portion 3a of the hose 3 is attachable to and detachable from the suction port 2a. The suction port 2a opens at the front part of the cleaner body 2. The exhaust port 2c opens at the rear of the cleaner body 2. The dust collector 2b and the electric blower 2d are built in the cleaner body 2.

By connecting the respective parts as shown in FIG. 1, from the floor suction tool 6 to the exhaust port 2c via the extension pipe 5, the hand handle body 4, the hose 3, the dust collecting part 2b, and the electric blower 2d. A continuous flow path F1 is formed. The air passage F1 is an air passage for collecting dust in the dust collecting portion 2b. The electric blower 2d generates an air flow in the air passage F1 from the floor suction device 6 on the suction side toward the exhaust port 2c. When the electric blower 2d performs the suction operation, the dust on the floor surface is sucked into the floor suction tool 6 together with the air. The dust-containing air sucked into the floor suction device 6 passes through the inside of each of the floor suction device 6, the extension pipe 5, the pipe body 4a of the handle 4 and the hose 3, and is sent to the cleaner body 2. .. The dust collecting portion 2b separates air from dust to hold dust. The exhaust port 2c discharges dust-free air, that is, clean air, to the outside of the cleaner body 2. The dust separated from the air is stored inside the dust collecting portion 2b. The dust collector 2b may be, for example, a cyclone type or a paper pack type.

The cleaner body 2 includes large wheels 2e and small wheels 2f. The large wheels 2e are provided on the left side surface and the right side surface of the cleaner body 2, respectively. The small wheel 2f is provided on the lower surface of the cleaner body 2 and is attached so that the direction thereof can be freely changed. The cleaner body 2 can change its direction with the large wheels 2e and the small wheels 2f in contact with the floor surface.

As described above, the electric vacuum cleaner 1 can be used as a vacuum cleaner that sucks and collects dust. The electric vacuum cleaner 1 can also be used for applications in which dust is blown off by a blowing airflow. That is, the vacuum cleaner 1 can also be used as a blower. When the electric vacuum cleaner 1 is used as a blower, the connecting portion 3a of the hose 3 is removed from the suction port 2a of the cleaner body 2 and connected to the exhaust port 2c.

2 and 3 are perspective views of the cleaner body 2 included in the electric vacuum cleaner 1 according to the first embodiment, as viewed obliquely from behind. As shown in FIG. 2, the exhaust port 2c is located on the rear surface of the cleaner body 2. The connecting portion 3a of the hose 3 can be attached to and detached from the exhaust port 2c. The connecting portion 3a of the hose 3 can be connected to the exhaust port 2c so that the exhaust port 2c and the hose 3 communicate with each other.

The exhaust port 2c has a columnar internal space extending in the front-rear direction of the cleaner body 2. The shape of the internal space of the exhaust port 2c is configured to be connectable to the connecting portion 3a of the hose 3. The cleaner body 2 may include a lattice (not shown) that can cover the exhaust port 2c when the connecting portion 3a of the hose 3 is not connected to the exhaust port 2c.

FIG. 3 shows a state in which the connecting portion 3a of the hose 3 is connected to the exhaust port 2c. In this state, the inside of the hose 3 and the exhaust port 2c form a series of spaces, and the exhaust gas which is the airflow discharged from the exhaust port 2c flows into the inside of the hose 3.

FIG. 4 is a perspective view of a part of the hose 3, the handle body 4 at hand, and the blow nozzle 10 included in the electric vacuum cleaner 1 according to the first embodiment. FIG. 5 is a perspective view of a part of the hose 3, the handle body 4, the extension tube 5, and the blow nozzle 10 included in the electric vacuum cleaner 1 according to the first embodiment. 4 and 5 show a mode in which the electric vacuum cleaner 1 is used as a blower.

The blow nozzle 10 blows out the air flow of the exhaust air sent by the electric blower 2d to the external space. The blow nozzle 10 is an attachment for a blower. In the form shown in FIG. 4, the blow nozzle 10 is connected to the distal end portion of the tube body 4 a of the handle body 4 at hand. In this embodiment, the blow nozzle 10 is connected to the exhaust port 2c of the cleaner body 2 via the tube body 4a of the handle body 4 and the hose 3. The blow nozzle 10 is attachable to and detachable from the distal end portion of the tubular body 4a of the handle body 4 at hand.

In the form shown in FIG. 5, the blow nozzle 10 is connected to the tip portion of the extension pipe 5. In this embodiment, the blow nozzle 10 is connected to the exhaust port 2c of the cleaner body 2 via the extension pipe 5, the pipe body 4a of the handle body 4 and the hose 3. The blow nozzle 10 is attachable to and detachable from the tip of the extension tube 5.

According to the present embodiment, when the electric vacuum cleaner 1 is used as a blower, the blow nozzle 10 is used to blow out the exhaust airflow sent by the electric blower 2d as an airflow suitable for the blower application. Is possible. In the following description, the air flow blown out from the blow nozzle 10 by the electric blower 2d is referred to as "blow air".

FIG. 6 is a perspective view of the blow nozzle 10 included in the electric vacuum cleaner 1 according to the first embodiment as seen from the upper surface side. FIG. 7: is the perspective view which looked at the blow nozzle 10 with which the electric vacuum cleaner 1 of Embodiment 1 was seen from the lower surface side. FIG. 8 is a plan view of the blow nozzle 10 included in the electric vacuum cleaner 1 according to the first embodiment.

As shown in these drawings, the blow nozzle 10 includes a blowout portion 10b and a tubular portion 10c. The blowout part 10b has a blowout port 10a that blows out blow air. The air outlet 10a is an opening at the front end of the blow nozzle 10. The tubular portion 10c is on the upstream side of the blowout portion 10b. The tubular portion 10c has a tubular shape. The tubular portion 10c has a rear opening 10d. The rear opening 10d is an opening at the rear end of the blow nozzle 10. The internal space of the blow nozzle 10 from the rear opening 10d to the outlet 10a serves as an air passage for blow air.

When the blow nozzle 10 is connected to the distal end portion of the tubular body 4a of the handle body 4 at hand, the tubular portion 10c is inserted inside the tubular body 4a. When the blow nozzle 10 is connected to the distal end portion of the extension pipe 5, the tubular portion 10c is in a state of being inserted inside the extension pipe 5.

The blow nozzle 10 includes ribs 10e. The rib 10e is an annular protrusion that surrounds the outer circumference of the boundary between the blowout portion 10b and the tubular portion 10c.

As shown in FIGS. 6 and 8, the tubular portion 10c includes a guide 10f and an engaging recess 10g. The guide 10f and the engaging recess 10g are on the outer surface of the tubular portion 10c. The guide 10f is a convex portion that extends along the axial direction of the tubular portion 10c.

The blowout part 10b is a part which forms the air path to the blowout port 10a from which blown wind blows. The shape of the blowout portion 10b affects the distribution of blow air blown from the blowout port 10a and the pressure loss of air passing through the inside of the blow nozzle 10.

As shown in FIGS. 6 and 7, the outlet 10a in the present embodiment has an elongated shape. The blowout portion 10b has a flat shape at least on the front side. The dimension in the thickness direction of the blowout portion 10b having a flat shape is smaller than the outer diameter dimension of the tubular portion 10c. The longitudinal dimension of the air outlet 10a, that is, the width of the air outlet 10a is larger than the outer diameter dimension of the tubular portion 10c. Since the air outlet 10a has an elongated shape, it is possible to blow out blow air suitable for the use of the blower.

FIG. 8 corresponds to a view seen from the thickness direction of the blowout portion 10b having a flat shape. FIG. 8 corresponds to a view seen from a direction perpendicular to the longitudinal direction of the outlet 10a. As shown in FIG. 8, in at least a part of the blowout portion 10b, the width of the blowout portion 10b continuously increases from the rib 10e toward the blowout port 10a. The width of the blowout part 10b is a dimension in a direction parallel to the longitudinal direction of the blowout port 10a.

The blow nozzle 10 is used as follows, for example. By inserting the tubular portion 10c of the blow nozzle 10 into the tip end opening 4d of the tube body 4a of the hand handle body 4, the blow nozzle 10 can be attached to the tube body 4a of the hand handle body 4. Alternatively, when the extension pipe 5 is attached to the hand handle body 4, the blow nozzle 10 is attached to the extension pipe 5 by inserting the tubular portion 10c of the blow nozzle 10 into the tip opening 5d of the extension pipe 5. it can. At this time, the guide 10f of the blow nozzle 10 is guided by a guide receiver (not shown) provided inside the tip opening 4d of the tube body 4a or inside the tip opening 5d of the extension tube 5, so that the blow nozzle 10 is guided to the proper mounting position.

The rib 10e abuts against the opening edge of the tip opening 4d of the tube body 4a or the opening edge of the tip opening 5d of the extension tube 5, whereby the tubular portion 10c is positioned at an appropriate insertion depth position. In this state, the engaging claws (not shown) provided on the tube body 4a or the extension tube 5 enter the engaging recess 10g of the blow nozzle 10 to prevent the blow nozzle 10 from coming off. By operating the release button 4c provided on the handle body 4 or the release button 5a provided on the extension tube 5, the engagement between the engagement claw and the engagement recess 10g is released, The blow nozzle 10 can be removed.

As described above, by connecting the connecting portion 3a of the hose 3 to the exhaust port 2c and operating the electric blower 2d with the blow nozzle 10 connected to the pipe body 4a or the extension pipe 5, Blow wind is blown out.

FIG. 9 is a front view of the blow nozzle 10 included in the electric vacuum cleaner 1 according to the first embodiment. FIG. 10 is a cross-sectional view taken along the line AA in FIG. FIG. 10 corresponds to a cross-sectional side view of the blow nozzle 10 included in the electric vacuum cleaner 1 according to the first embodiment. 11: is a side view which shows the state which attached the blow nozzle 10 with which the electric vacuum cleaner 1 of Embodiment 1 was attached to the handle body 4 at hand. FIG. 12 is a cross-sectional side view showing a state in which the blow nozzle 10 included in the electric vacuum cleaner 1 according to the first embodiment is attached to the handle body 4 at hand. 11 and 12, the hose 3 is not shown.

As shown in FIG. 10, the center 10h of the blowout port 10a of the blow nozzle 10 is at a position displaced from the extension line 10j of the central axis 10i of the air passage inside the tubular portion 10c. The central axis 10i may be a straight line passing through the centroid of a figure obtained by cutting the air passage inside the tubular portion 10c, that is, the internal space of the tubular portion 10c with a plane perpendicular to the axial direction of the tubular portion 10c. The central axis 10i may be a straight line passing through the centroid of a figure when the internal space of the rear opening 10d of the tubular portion 10c is viewed from the axial direction of the tubular portion 10c.

As shown in FIG. 12, the tube body 4 a of the handle body 4 at the hand forms an air passage on the upstream side with respect to the blow nozzle 10. The pipe body 4a includes a bent portion 4e having a curved air passage. When the blow wind passes through the bent portion 4e, it is biased to the outside of the bent portion 4e. As a result, in the air passage on the downstream side of the curved portion 4e, the flow velocity in the first region 4f, which is a region corresponding to the outside of the curved portion 4e, is the region corresponding to the inside of the curved portion of the curved portion 4e. It becomes higher than the flow velocity in the region 4g.

Even in the air passage inside the tubular portion 10c of the blow nozzle 10, a flow velocity distribution similar to the above occurs. That is, as shown in FIG. 10, the flow velocity of the first region 10k, which is a region corresponding to the outside of the bend of the bent portion 4e of the tubular body 4a, is the second region, which is a region corresponding to the inside of the bend of the bent portion 4e. High compared to a flow velocity of 10 m.

The center 10h of the outlet 10a is located outside the bend of the bent portion 4e with respect to the extension line 10j of the central axis 10i of the air passage inside the tubular portion 10c. In other words, the center 10h of the air outlet 10a is located at a position displaced toward the first region 10k with respect to the extension line 10j. According to this embodiment, the following effects can be obtained. The blow air in the first region 10k having a high flow velocity can be efficiently guided to the outlet 10a without decelerating. Therefore, the blow air can be efficiently blown out from the air outlet 10a.

In the present embodiment, the outlet 10a is located at a position that does not intersect the extension line 10j. That is, the entire outlet 10a is at a position displaced so as not to intersect the extension line 10j. As a result, the following effects can be obtained in this embodiment. The blow air in the first region 10k having a high flow velocity can be guided to the outlet 10a more efficiently. Therefore, the blow air can be blown out more efficiently from the outlet 10a.

As shown in FIGS. 9 and 10, the blow nozzle 10 of the present embodiment includes a rectifying body 10n arranged in the air passage. The rectifying body 10n changes the direction of blow air passing through the air passage inside the blow nozzle 10. The rectifying body 10n is arranged in the air passage inside the blowout portion 10b. The rectifying body 10n is located at the center of the blowing portion 10b in the width direction. The rectifying body 10n is arranged at a position where the width of the blowout portion 10b is increasing. According to the present embodiment, the following effects can be obtained by including the rectifying body 10n. By changing the direction of the blow air, the blow air can be distributed evenly to the wide outlet 10a.

As shown in FIG. 12, in the present embodiment, the edge of the blowout port 10a has an arc shape in a plan view of the blow nozzle 10. Therefore, there is a gap between the imaginary plane 10p that is in contact with the outlet 10a and the outlet 10a. As a result, the following effects are obtained. Even if the air outlet 10a is abutted against a flat surface such as a floor surface, the air outlet 10a is not completely closed, so that blow air can flow. Therefore, overheating of the cleaner body 2 can be reliably prevented. The shape of the outlet 10a is not limited to the above example. If the shape is such that there is a gap between the virtual plane 10p and the outlet 10a, the same effect as above can be obtained even with other shapes. For example, the shape of the edge of the outlet 10a may be a concave shape instead of the convex shape such as the arc shape described above.

In this embodiment, the example in which the blow nozzle 10 is attachable to and detachable from each of the handle body 4 and the extension tube 5 has been described. The present invention is not limited to such an example. The blow nozzle 10 may be integrated with the handle body 4 or the extension tube 5.

1 vacuum cleaner, 2 vacuum cleaner body, 2a suction port, 2b dust collecting part, 2c exhaust port, 2d electric blower, 2e, 2f wheel, 3 hose, 3a connecting part, 3b hose body, 4 hand handle body, 4a tube Body, 4b handle, 4c release button, 4d tip opening, 4e bent portion, 4f first area, 4g second area, 5 extension tube, 5a release button, 5b telescopic button, 5d tip opening, 6 floor suction tool, 10 Blow nozzle, 10a outlet, 10b outlet, 10c tubular portion, 10d rear opening, 10e rib, 10f guide, 10g engaging recess, 10h center, 10i central axis, 10j extension line, 10k first area, 10m second Area, 10n Rectifier, 10p Virtual plane, 70 Joint part

Claims (6)

Electric blower,
A blow nozzle that blows out the air flow sent by the electric blower,
A tubular body forming an air passage upstream of the blow nozzle;
Equipped with
The blow nozzle includes a blower unit having a blower outlet that blows out an air flow, and a tubular portion on the upstream side with respect to the blower unit,
The center of the air outlet, Ri position near offset relative extension of the center axis of the air passage of the tubular portion,
The pipe body includes a bent portion in which the air passage is bent,
Wherein the center of the air outlet, with respect to the extension, the position near Ru vacuum cleaner shifted to the outside of bending of the bent portion. Electric blower,
A blow nozzle that blows out the air flow sent by the electric blower,
A vacuum cleaner main body having a built-in electric blower and having a suction port and an exhaust port,
A hose having a hose body and a connecting portion on one end side of the hose body,
Equipped with
The blow nozzle includes a blower unit having a blower outlet that blows out an air flow, and a tubular portion on the upstream side with respect to the blower unit,
The center of the air outlet, Ri position near offset relative extension of the center axis of the air passage of the tubular portion,
The connecting portion can be connected to both the suction port and the exhaust port,
The blow nozzle is connectable der Ru vacuum cleaner to the exhaust port through the hose. Electric blower,
A blow nozzle that blows out the air flow sent by the electric blower,
Equipped with
The blow nozzle includes a blower unit having a blower outlet that blows out an air flow, and a tubular portion on the upstream side with respect to the blower unit,
The center of the air outlet, Ri position near offset relative extension of the center axis of the air passage of the tubular portion,
The air outlet, vacuum cleaner that have a shape of a gap between the virtual plane and the outlet in contact with the air outlet. The vacuum cleaner according to any one of claims 1 to 3, wherein the outlet is located at a position that does not intersect with the extension line. The electric vacuum cleaner according to any one of claims 1 to 4 , wherein the blow nozzle includes an air passage through which an air flow passes, and a rectifying body that is disposed in the air passage and changes a direction of the air flow. The air outlet, vacuum cleaner according to any one of claims 1 to 5 having an elongated shape.

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