Nozzle for vacuum cleaner

Abstract

To provide a nozzle for a cleaner capable of avoiding the adhesion of dust or the like to a suction fan in the nozzle for the cleaner for rotating the fan by a suction air current and rotating the fan on a blow-off side linked with it.SOLUTION: A suction device comprises a suction part having one end connected to the tip of the suction hose and the other end being a suction port, and a discharge part having a discharge air introduction port for introducing air from the outside and a discharge port for discharging the introduced air to the vicinity of the suction port, wherein the suction part is provided with a suction fan rotated by a suction air flow in the suction part, the discharge part is provided with a discharge fan for forming the discharge air flow in the discharge part, and a means is employed by which the suction fan and the discharge fan rotate integrally and a part of the suction air flow passes outside the outer circumference of the rotation region of the suction fan.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a nozzle for a vacuum cleaner, and more particularly to a technique for a nozzle for a vacuum cleaner with a blowing function. [Background technology]

[0002] Conventionally, vacuum cleaner attachments have been considered that have a blowing function to lift up dust around the object to be cleaned and then suck it up. One method for creating an outlet airflow is to rotate a fan using the suction airflow, which then rotates the fan on the outlet side in conjunction with it. This method can create an outlet airflow without using any additional power, but dust in the suction airflow can get tangled in the fan blades and shaft, making maintenance difficult. Therefore, there has been a demand for a technology that can prevent dust and the like from adhering to a fan while using a fan for suction airflow in the blowing function.

[0003] Various techniques have been proposed to address these problems. For example, a cleaner attachment (see Patent Document 1) has been proposed and is a known technique. More specifically, this cleaner attachment has an air outlet inside the tip opening of an intake passage that has a connection to a suction-type cleaner, and the turbine blades that are driven by the airflow flowing through the intake passage rotate to supply outside air to the air outlet. However, there is no mention of dust or the like getting caught in the fan, and the above problem remains unresolved. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 63-18945 Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above problems, the present invention aims to provide a vacuum cleaner nozzle that can prevent dust from getting entangled in the suction side fan and can be an attachment that creates a blowing air current using a suction air current fan in the vacuum cleaner nozzle, making it easy to maintain. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention comprises a suction section having one end connected to the tip of a suction hose and the other end being a suction port, and a blow-out section having a blow-out air inlet for introducing air from the outside and a blow-out port for blowing the introduced air out near the suction port, the suction section being provided with a suction fan that rotates due to the suction airflow within the suction section, and the blow-out section being provided with a blow-out fan that forms the blow-out airflow within the blow-out section, the suction fan and the blow-out fan rotating as a unit, and part of the suction airflow passing outside the outer periphery of the rotation area of ​​the suction fan.

[0007] In addition, the present invention employs a means in which the blades of the suction fan are rectangular flat plates, the rotating shaft of the suction fan is held by a suction fan holder, the intake section has a pipe section from one end to the other and a bulge section that bulges out from the side of the pipe section, and the rotating shaft is located in the bulge section.

[0008] Furthermore, the present invention employs a means in which a cone-shaped portion is provided in front of the suction port, and the cone portion is transparent or semi-transparent and deformable.

[0009] Furthermore, the present invention employs a means in which the direction of the rotation axis of the suction fan is perpendicular to the direction of the suction airflow, and when a portion of the duct section is most blocked by the suction fan, the cross-sectional area of ​​the duct section at the suction fan is more than half of the cross-sectional area large enough for the suction airflow to pass through.

[0010] Furthermore, the present invention employs a blow-out volume adjustment section that adjusts the volume of air blown out from the blow-out section, and the rotating side of the blow-out fan has a disk section whose circumference is the outer periphery of rotation, and the blow-out volume adjustment section has a braking section that applies force to the disk section to brake the rotation of the blow-out fan, and by changing the amount of force applied by the braking section to the disk section, the rotation volume of the blow-out fan is adjusted, thereby adjusting the blow-out volume.

[0011] Furthermore, the present invention has a blow-out volume adjustment section that adjusts the volume of air blown out from the blow-out section, and the blow-out volume adjustment section employs a means for adjusting the blow-out volume by covering all or part of the blow-out air inlet.

[0012] Furthermore, the present invention has a blow-out volume adjustment section that adjusts the volume of air blown out from the blow-out section, and employs a means for adjusting the rotational volume of the suction fan and the blow-out fan and adjusting the volume of air blown out by moving the position of the rotation axis of the suction fan and changing the volume of suction airflow passing outside the outer periphery of the rotation area of ​​the suction fan. [Effects of the Invention]

[0013] The vacuum cleaner nozzle according to the present invention can prevent dust from getting entangled in the suction fan in an attachment that uses a suction airflow fan to create a blow-out airflow, making the attachment easy to maintain. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is an overall perspective view showing an embodiment of a vacuum cleaner nozzle according to the present invention. [Figure 2] 1A and 1B are schematic cross-sectional views illustrating the relationship between a suction fan and a blowing fan in a vacuum cleaner nozzle according to the present invention. [Figure 3] 5A to 5C are cross-sectional views illustrating the operation of the suction fan in the vacuum cleaner nozzle according to the present invention. [Figure 4] 5A to 5C are cross-sectional views illustrating the operation of the blow-out fan in the vacuum cleaner nozzle according to the present invention. [Figure 5] 5A to 5C are cross-sectional views showing the operation of another embodiment of the nozzle for a vacuum cleaner according to the present invention. [Figure 6] 10A to 10C are schematic diagrams illustrating the operation of another embodiment of the vacuum cleaner nozzle according to the present invention. [Figure 7] 5A to 5C are cross-sectional views showing the operation of another embodiment of the nozzle for a vacuum cleaner according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] The greatest feature of the vacuum cleaner nozzle according to the present invention is that it can prevent dust and the like from adhering to the fan while using a suction airflow fan. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a vacuum cleaner nozzle according to the present invention will be described with reference to the drawings. The vacuum cleaner nozzle according to the present invention is not limited to the examples described below, but can be modified as appropriate within the scope of the technical concept of the present invention, i.e., within the scope of the shape, dimensions, structure, etc. that can achieve the same functional effects.

[0016] The present invention will be described with reference to FIGS. FIG. 1 shows an embodiment of a vacuum cleaner nozzle according to the present invention, where (a) is an overall perspective view and (b) is a perspective view of a state in which a cap portion is attached to an air outlet. FIG. 2 shows the relationship between the suction fan and the blow-out fan in the vacuum cleaner nozzle according to the present invention, where (a) is a schematic diagram explaining the relationship between the suction fan and the blow-out fan, (b) is a schematic cross-sectional view of the suction part and the blow-out part as seen from above, and (c) is a cross-sectional view of the suction fan and the blow-out fan as seen from behind. FIG. 3 is a diagram illustrating the operation of the suction fan in the vacuum cleaner nozzle according to the present invention, in which (a) is a cross-sectional view of the suction fan, (b) is a schematic cross-sectional view illustrating the behavior of dust in the suction fan, (c) is a schematic cross-sectional view illustrating the behavior of dust in a fan with a typical turbine blade, and (d) is a schematic cross-sectional view illustrating the behavior of dust when the rotation axis of the suction fan is located in the tubular portion of the suction air flow path. FIG. 4 shows the operation of the blow-out fan in the vacuum cleaner nozzle according to the present invention, where (a) is a cross-sectional view of the blow-out fan, and (b) and (c) are cross-sectional views illustrating how the vacuum cleaner nozzle sucks up dust between ornaments and other objects. FIG. 5 is a cross-sectional view showing the operation of another embodiment of the vacuum cleaner nozzle according to the present invention, and is a schematic cross-sectional view showing how the brake button is pressed with the thumb to adjust the blowout volume. 6A, 6B, and 6C are schematic diagrams showing the operation of another embodiment of the vacuum cleaner nozzle according to the present invention, and are schematic diagrams showing how the amount of air entering the blow-out fan is adjusted. 7A, 7B, and 7C are cross-sectional views showing the operation of another embodiment of the vacuum cleaner nozzle according to the present invention, in which the positions of the suction fan and the blowout part are changed.

[0017] The vacuum cleaner nozzle 1 is a vacuum cleaner attachment that is connected to the tip of a suction hose provided in an electric vacuum cleaner. It is attached to a general vacuum cleaner, and the suction force of the vacuum cleaner is used to drive the blower, and the blower is used as a duster, blowing away the dust while simultaneously sucking it up with the vacuum cleaner, thereby efficiently stirring up the dust that has accumulated between and in the gaps between the exhibits that are the target objects, and reducing the amount of dust that is stirred up and scattered. Conventionally, dusters using gas pressure, electricity, or the airflow of a vacuum cleaner have been proposed. In addition, various nozzles have been proposed that are attached to the nozzle tip of a vacuum cleaner to knock off and suck up accumulated dust with a tap or brush. However, while the duster mentioned above can blow away dust, the dust can scatter and redeposit, requiring cleaning of the surrounding area. Furthermore, with a nozzle equipped with a brush, it is difficult to reach the brush part of an exhibit or other three-dimensional object, and there is a risk that the brush may move or damage the exhibit. The present invention is attached to the suction part of a vacuum cleaner, and simultaneously operates the duster function and the suction function of the vacuum cleaner, blowing away accumulated dust while efficiently sucking the blown dust with the vacuum cleaner.

[0018] The vacuum cleaner nozzle 1 is composed of a suction part 10, a blowing part 30, and a cone part 50. A cap part 80 may also be added. The suction unit 10 is a part that sucks in dust. The blowout unit 30 is a part that blows out air from the atmosphere. The cone unit 50 is attached to the tip of the suction unit 10 and prevents the diffusion of dust that is blown up by the airflow from the blowout port. One end of the suction part 10 is connected to the tip of the suction hose 90, the other end is a suction port 11, and from one end to the other is a suction air flow path 12 which is a flow path for the suction airflow. The suction section 10 mainly comprises a pipe section 13 , a bulging section 14 and a suction fan 20 . The tubular portion 13 constitutes the suction portion 10 from one end to the other end, and has a bulging portion 14 that bulges out from the side surface of the tubular portion 10 . The suction fan 20 is rotated by the suction airflow 12 . As shown in FIG. 3(a), the suction part 10 as a whole has a shape consisting of a tube part 13 and a bulging part 14 that bulges outward from the side surface at the middle part of the cylindrical tube part 13. The cylindrical portion 13 may be, for example, cylindrical, because it has a high affinity with the suction hose. The cylindrical portion 13 may also be a straight pipe, because in this case the cross-sectional shape of the pipe will be approximately uniform, reducing turbulence in the airflow. The bulging portion 14 is a portion that houses the suction fan 20, and includes a suction fan holding portion 15. The rotating shaft 22 is held by the suction fan holding portion 15, and therefore the rotating shaft 22 is also located in the bulging portion 14. As shown in Figure 3(a), the suction fan 20 is mainly housed in the bulging portion 14, with a portion of it extending into the duct portion 13. Furthermore, the blades 21 of the suction fan 20 do not completely block the duct portion 13. In other words, a portion of the suction airflow 12 passes outside the outer periphery 23 of the rotation area of ​​the suction fan 20. Furthermore, when considering the passage of relatively large dust particles, the size of most of the dust particles is thought to be roughly half the diameter of the pipe portion 13 or less. In this case, when the suction fan 20 is blocking a portion of the duct 13 to the maximum extent relative to the cross-sectional area through which the suction airflow passes inside the duct 13, if the cross-sectional area at the suction fan 20 is more than half, it is thought that even relatively large dust particles will be able to pass through without any problems. Therefore, as shown in FIG. 2(c), the cross-sectional area of ​​the pipe section 13 is S1, and the cross-sectional area where the flow rate is narrowest due to the blade section 21 of the suction fan 20 is S2, and S2 is set to be half or more of S1.

[0019] The axial direction of the rotation shaft 22 is perpendicular to the flow of the suction airflow path 12. In other words, it is perpendicular to the longitudinal direction of the tube portion. The blades 21 of the suction fan 20 are rectangular and flat. The rotary shaft 22 of the suction fan 20 is held by the suction fan holder 15. Because the blade portion 21 is flat, even if a relatively large particle of dust 91 hits the blade portion 21, the dust 91 slides along the surface of the blade portion 21 and is swept away toward the suction hose 90, as shown in Figure 3(b). If the blades were turbine blades 92 as shown in Figure 3(c), the curved surface of the blades would make it easier to catch the airflow, but dust 91 would also be more likely to adhere to the blades. This would require frequent maintenance of the suction fan, resulting in a decline in performance. Furthermore, because the blades 21 are rectangular, the outer peripheral surface created by the rotation of the suction fan 20 is flat. If the blades 21 were, for example, elliptical, there is a possibility that large dust particles would get caught on the tips of the blades when they pass through. However, with a rectangular blade, the tips of the blades are flat, so there is little chance that dust particles will get caught. Furthermore, since the rotation axis 22 of the suction fan 20 is located in the bulging portion 14, in other words, not on the inner diameter of the pipe portion 13 or on an extension of the inner diameter, the dust 91 only hits the vicinity of the tip of the blade portion 21 as shown in FIG. 3(b), and the dust 91 slides along the surface of the blade portion 21 and is discharged. 3(d), if the rotating shaft 22 of the suction fan 20 is located on the inner diameter of the pipe portion 13 and on an extension of the inner diameter, dust 91 will also adhere to the vicinity of the rotating shaft 22 of the suction fan 20. Lint and the like will wind around the shaft, and if maintenance is not performed frequently, the rotation rate of the suction fan 20 will decrease. Furthermore, as shown in Figure 2(c), by making the width of the blade portion 21 approximately the same length as the inner diameter of the pipe portion 13, the gap in the width direction between the blade portion 21 and the pipe portion 13 is reduced, which reduces airflow leakage, which is preferable.

[0020] The blowout section 30 is a section that draws in air from the atmosphere and blows it out from the blowout port. The blowing section 30 is composed of a blowing guide section 32 and a blowing fan 40 . The rotation of the blow-out fan 40 creates a blow-out airflow. The blowout guide section 32 has a blowout air inlet 31 that introduces air from the outside and a blowout outlet 33 that blows the introduced air out near the suction port. "Nearby" means close enough that the blown air and the dust stirred up by it can be sucked in through the suction port. For example, this is the range inside the target side 51 of the cone section 50. The section from the blown air inlet 31 to the blown outlet 33 is a blown air flow path 34, which is a flow path of the blown air current. A blow-out fan 40 is disposed near the blow-out air inlet 31 so that the side surface of the blow-out fan 40 faces the blow-out air inlet 31 . As shown in each diagram in Figure 2, the rotation axes of the suction fan 20 and the blow-out fan 40 are on the same axis and are integrated, so the rotational motion of the suction fan 20 is transmitted directly to the blow-out fan 40, resulting in the rotational motion of the blow-out fan 40. The blow-out air inlet 31 is substantially circular, and is located at a position that allows air to be easily taken in from the side of the blow-out fan 40 toward the center of the blow-out fan 40 . The blower fan 40 is made up of a rotary shaft 42 , a disk portion 43 and a blade portion 41 . The disk portion 43 is located on the suction fan side of the blow-out fan 40, with the outer periphery of the rotation as its circumference. The wide surface of the disk portion 43 is perpendicular to the rotation axis 42, and the blade portion 41 is located on it. The blade portion 41 has a curved shape that creates the effect of pushing the air inside out as the blow-out fan 40 rotates. For example, it has the shape of a sirocco fan. As the blow-out fan 40 rotates, air enters the blow-out section 30 through the blow-out air inlet 31. The air is pushed out toward the outer periphery of the blow-out fan 40 by the blades 41 of the blow-out fan 40, passes through the blow-out guide section 32, and is guided in the direction of the blow-out outlet 33, and is blown out from the blow-out outlet 33. The structure of the blowout guide portion 32 may be the same as the blowing structure of a blower.

[0021] The cone part 50 is a conical tube placed in front of the suction port 11 of the suction part 10. The suction port side 52, which is the side with a smaller diameter, is attached to the suction port 11, and the target side 51, which is the side with a larger diameter, is the target side for dust and the like. The cone part 50 is fixed only to the suction part 10 at the suction port 11. Therefore, the connection structure between the cone part 50 and the suction part 10 is simple. When dust between ornaments or the like is sucked, the dust between the ornaments or the like is stirred up by the air from the air outlet 33, and the dust is sucked from the suction port 11, but if there is nothing to cover the area around the object, the dust will scatter in all directions, and there may be cases where the suction port 11 is unable to suck in enough dust. By covering the object with the cone part 50, dust stirred up by the airflow from the air outlet 33 remains inside the cone part 50 and can be effectively sucked from the suction port 11. The cone portion 50 is preferably transparent or translucent. When the cone portion 50 is used to cover an area around an object, if the cone portion 50 is opaque, the object cannot be seen, and it is possible that the cone portion 50 or the air outlet 33 may come into contact with the object. By making the cone portion 50 transparent or translucent, the user can check the object through the cone portion 50 and perform cleaning while avoiding contact between the cone portion 50 and the air outlet 33. Cone portion 50 is preferably made of resin or the like and is deformable. If the object is near a wall or on an uneven surface, cone portion 50 must be deformable in order to get in the way and prevent the user from approaching the object. Since the cone part 50 is deformable, the cone part 50 can flexibly deform relative to a wall or a platform, and can smoothly approach the target object (FIG. 4(b)). As shown in FIG. 2( a ), a part of the blowing part 30 is disposed so as to pass through the blowing part hole 53 of the cone part 50 . The blowout section 30 and the cone section 50 are loosely fitted together at the blowout hole 53 of the cone section 50, so that deformation of the cone section 50 does not affect the blowout section 30.

[0022] The cap part 80 is attached to the air outlet 33. It is cylindrical with a tapered tip (FIG. 1(b)). By attaching the cap portion 80, the blown airflow comes out from a narrow opening, making the airflow narrower and increasing the speed of the airflow. This allows for a strong airflow to be directed at a pinpoint, making it possible to smoothly remove even deeply accumulated dust (Figure 4c).

[0023] The operation of the vacuum cleaner nozzle 1 will be explained with reference to Figures 2, 3, and 4. The vacuum cleaner nozzle 1 is attached to the tip of the suction hose 90 of an electric vacuum cleaner. It is used to suck up dust from gaps and uneven places other than floors. By blowing out air in parallel with suction, it lifts up accumulated dust into the air and then sucks it up. The air is blown out using the wind pressure of the suction airflow. A suction fan 20 is installed on the suction side, and blow-out fans 40 are installed on both sides of it. The suction fan 20 rotates due to the wind pressure of the suction airflow, and this force is transmitted directly to the blow-out fan 40. The wind pressure generated by the rotation of the blow-out fan 40 is then blown out from the air outlet 33. Therefore, as shown in each drawing of FIG. 2, the suction fan 20 and the blowing fan 40 are integrated with each other by a shaft through a partition between the suction section 10 and the blowing section 30. By providing two blow-out fans 40, one on each side, the amount of blow-out can be divided into two, allowing the shape of the blow-out fans 40 to be made thinner and the overall size to be made compact. The suction airflow and blown airflow will be explained with reference to FIG. 2(b). The suction airflow generated by the vacuum cleaner is collected by the cone part 50, passes through the suction port 11, passes through the pipe part 13, rotates the suction fan 20, and is sent to the vacuum cleaner through the suction hose 90. At this time, dust is sucked in, so adhesion of dirt and dust to suction fan 20 becomes a problem, but as suction fan 20 does not cover the entire pipe portion 13 as shown in Figure 3(a), large dust particles pass outside the outer periphery of suction fan 20. Small dust particles may hit blade portion 21 as shown in Figure 3(b), but because blade portion 21 is flat, the dust particles slide off blade portion 21 and rarely remain on blade portion 21. Furthermore, if the rotating shaft 22 is located on the pipe part 13 side, dust will adhere to the vicinity of the shaft as shown in Fig. 3(d). Since there is little centrifugal force near the shaft, dust may remain there, or, in the case of lint, it may become tangled around the shaft. In this embodiment, the rotary shaft 22 is located on the bulging portion 14 side, so dust does not directly hit the vicinity of the rotary shaft 22 and dust is less likely to become entangled with the rotary shaft 22.

[0024] The rotational force obtained by the suction fan 20 is transmitted to the left and right blow-out fans 40. As the blow-out fans 40 rotate, they take in outside air, which passes through the blow-out guide part 32, where the left and right blow-out airflows join together near the blow-out port 33, and are then blown out of the blow-out port 33 toward the target object. As shown in FIG. 4(c), the blown air hits the vicinity of the ornament F, which is the target object, and stirs up dust around the ornament F. The stirred-up dust is then covered by the cone part 50 and sucked in through the suction port 11. This series of operations allows the dust accumulated between exhibits, ornaments, etc. to be efficiently sucked up. In this way, in this embodiment, the blow-out air inlet 31 is installed on the side, and high-pressure air pressure is used by the blow-out fan to lift up and clean dust on three-dimensional objects such as ornaments. 2(c), the width of the rotary shaft 22 of the suction fan 20 is approximately the same as the diameter of the pipe portion 13. By using such dimensions, leakage of the suction airflow from the side portion of the rotary shaft 22 is reduced, and rotation efficiency can be improved. Furthermore, by attaching the cap portion 80, it is possible to suck up dust from smaller areas.

[0025] Although it is convenient to use the blown airflow when suctioning, there are cases where it is necessary to weaken the blown airflow depending on the object, for example, when the object is delicate and a strong airflow is not suitable. Therefore, the blowout amount adjusting unit that adjusts the blowout airflow will be described.

[0026] One possible blowout volume adjustment unit is a structure that directly controls the rotation of the blowout fan 40. This will be explained with reference to FIG. A brake unit 60 is added to the blowout unit 30. The brake unit 60 mainly consists of a braking unit 61, a button unit 62, and a spring 63. The braking unit 61 is a part that abuts against the disk unit 43 of the blowout fan 40 and limits the amount of rotation of the blowout fan 40 by friction. It is made of, for example, rubber, elastomer, silicone, etc. The button unit 62 is a part that the user presses when they want to reduce the amount of blowout or stop it. Since the vacuum cleaner nozzle 1 is often held by the user when in use, it is preferable for ease of operation to be located, for example, where the thumb would be placed when holding the vacuum cleaner nozzle 1. The button portion 62 is connected to the brake portion 61, and a spring 63 normally keeps the brake portion 61 at a position away from the disk portion 43. When the user wants to reduce or stop the blowout volume while using the vacuum cleaner nozzle 1, the user presses the button portion 62 of the brake portion 60. A light press reduces the blowout volume, and a firm press stops the blowout. In this way, the blowout volume can be adjusted with a simple operation, which is preferable. This method also provides stable control by continuously applying a constant amount of friction, so a fan with a disk portion 43 is suitable. Therefore, a fan with a side surface, such as a sirocco fan, is suitable.

[0027] Another possible blowout volume adjustment section is a structure that limits the amount of air that enters the blowout fan 40. This will be described with reference to FIG. An inlet closing plate 35 is provided near the blow-out air inlet 31 of the blow-out section 30. The inlet closing plate 35 blocks part or all of the blow-out air inlet 31, thereby restricting the blow-out amount. The inlet closing plate 35 is rotatably fixed to the blow-out section 30 by an inlet closing plate rotation shaft 36. Normally, all of the blow-out air inlets 31 are open, as shown in Figure 7(a). When restricting the blowout volume, the inlet closing plate 35 is rotated to close a portion of the blowout air inlet 31. By closing it, the amount of air entering the blowout section 30 from the blowout air inlet 31 decreases, and the blowout volume decreases. Also, as shown in FIG. 7(c), by completely closing the blown air inlet 31 with the inlet closing plate 35, it is possible to stop the blowing. Furthermore, by separately adjusting the left and right blow-out air inlets 31, more precise control becomes possible. In this way, the blowout volume can be adjusted with a simple operation, which is preferable.

[0028] Another possible blowout volume adjustment section is a structure that adjusts the volume of suction airflow hitting the suction fan 20. This will be described with reference to FIG. By widening the bulge 14 and widening the suction fan holder 15, which is the bearing for the rotation shaft 22 of the suction fan 20, in the vertical direction, the suction fan 20 can be moved up and down. By moving the position of the rotation shaft 22 of the suction fan 20 and changing the suction airflow 12 that passes outside the outer periphery 23 of the rotation area of ​​the suction fan 20, the amount of airflow to the suction fan 20 is changed relatively, and the rotation rates of the suction fan 20 and the blow-out fan 40 are changed, thereby adjusting the blow-out amount. The components that move up and down are the suction fan 20, the blow-out fan 40 integrated with the suction fan 20, and the blow-out section 30 including the blow-out fan 40. In the example of FIG. 5, a suction fan blowout section movement fulcrum 70 is provided at the intersection of the blowout section 30 and the cone section 50, and the suction fan 20 and the blowout section 30 rotate around this point. The suction fan blowout unit movement fulcrum 70 can be made a stable fulcrum by being provided on an arm that is fixed to the pipe portion 13 and extended to the fulcrum, for example. A suction fan blowout section movement guide 71 is provided behind the blowout section 30. The suction fan blowout section movement guide 71 acts as a guide rail when moving the blowout section 30. By abutting and sliding against the rear of the blowout section 30, the blowout section 30 can be easily moved to any position. The suction fan holder 15 is provided with a suction fan shaft movement guide 72. The rotary shaft 22 and the suction fan holder 15 can be moved along the suction fan shaft movement guide 72. Figure 5(a) shows the state in which the suction fan 20 and blowout unit 30 are in their normal positions. Figure 5(b) shows the state in which the suction fan 20 and blowout unit 30 are rotated slightly downward around the suction fan blowout unit movement fulcrum 70. The amount of suction airflow hitting the suction fan 20 decreases, reducing the rotational force and, as a result, reducing the blowout volume. 5(c) shows a state in which the suction fan 20 and the blowout section 30 are rotating. The suction airflow hardly hits the suction fan 20, and the fan is not rotating at all. In this way, by adjusting the positions of the suction fan 20 and the blowout section 30, the blowout amount can be adjusted, and usability can be improved.

[0029] In this way, the vacuum cleaner nozzle of the present invention can prevent dust from becoming entangled in the suction side fan in an attachment that creates an outlet airflow using a suction airflow fan, making it an attachment that is easy to maintain.

[0030] Furthermore, since the blades of the suction fan are flat and slippery, the adhesion of dust to the blades can be reduced, making maintenance easier.

[0031] Furthermore, by having a cone-shaped, transparent or semi-transparent, deformable cone part, it is possible to prevent dust stirred up by the blown air current from scattering in all directions, and it is also possible to check whether the cone has come into contact with an ornament or the like, and it is convenient because it is possible to insert the nozzle into a narrow space.

[0032] Furthermore, when a portion of the pipe is most blocked by the suction fan, the cross-sectional area of ​​the pipe through which the suction airflow passes is more than half, so even relatively large dust particles can pass through without any problems, making the attachment easy to maintain.

[0033] Furthermore, by providing a brake that limits the rotational speed of the blow-out fan, the blow-out volume can be limited, and the blow-out volume can be set to suit the user's intention, which is convenient.

[0034] Furthermore, by providing a lid at the air inlet to the blow-out fan, the blow-out volume can be restricted, and the blow-out volume can be adjusted to suit the user's intention, which is convenient.

[0035] Furthermore, by changing the position of the rotation axis of the blow-out fan, the blow-out amount can be restricted, and the blow-out amount can be adjusted to suit the user's intention, which is convenient. [Industrial Applicability]

[0036] The vacuum cleaner nozzle according to the present invention is compact and uses a technology that adds a blower to a vacuum cleaner nozzle without using any other power source, and is therefore considered to have great industrial applicability. [Explanation of symbols]

[0037] 1 vacuum cleaner nozzle 10 Suction part 11 Suction port 12. Suction air flow path 13 Pipe section 14 Bulge 15 Suction fan holder 20 Suction fan 21 Blade 22 Rotation axis 23 Outer circumference 30 Air outlet 31 Blowout air inlet 32 Air outlet guide 33 Air outlet 34 Air outlet flow path 35 Inlet closure plate 36 Inlet closing plate rotation axis 40 Blowing fan 41 Wing 42 Rotation axis 43 Disc 50 Cone section 51 Target side 52 Suction port side 53 Air outlet hole 60 Brake section 61 Braking part 62 Button section 63 Spring 70 Suction fan outlet moving fulcrum 71 Suction fan outlet moving guide 72 Suction fan shaft movement guide 80 Cap part 90 Suction hose 91 Dust 92 Turbine blades F Figurine S unit H hand

Claims

1. A vacuum cleaner nozzle connected to the tip of a suction hose provided in an electric vacuum cleaner, a suction part having one end connected to the tip of the suction hose and the other end being a suction port; a blowout section having a blowout air inlet for introducing air from the outside and a blowout outlet for blowing the introduced air out near the suction port, The suction unit is provided with a suction fan that rotates due to the suction airflow within the suction unit, The blowout section is provided with a blowout fan that generates a blowout airflow within the blowout section, The suction fan and the blowing fan rotate as a unit, A nozzle for a vacuum cleaner, characterized in that a part of the suction airflow passes outside the outer periphery of the rotation area of ​​the suction fan.

2. The blades of the suction fan are rectangular flat plates, and the rotation shaft of the suction fan is held by a suction fan holder, The intake section has a pipe section extending from one end to the other end and a bulging section bulging out from a side surface of the pipe section, 2. The nozzle for a vacuum cleaner according to claim 1, wherein the rotary shaft and the suction fan holding portion are located in the bulging portion.

3. 3. The nozzle for a vacuum cleaner according to claim 2, further comprising a cone-shaped portion in front of the suction port, the cone portion being transparent or translucent and deformable.

4. The rotation axis direction of the suction fan is perpendicular to the direction of the suction airflow, 4. The vacuum cleaner nozzle according to claim 3, wherein when a portion of the pipe is most blocked by the suction fan, the cross-sectional area at the suction fan portion is more than half of the cross-sectional area of ​​the pipe portion through which the suction airflow passes.

5. a blowout amount adjusting unit that adjusts the amount of air blown out from the blowout unit; The blowout fan has a circular plate portion on its rotating side, the circular plate portion having a circumference on the outer periphery of the rotating portion.

5. A vacuum cleaner nozzle as described in any one of claims 1 to 4, characterized in that the blowout volume adjustment section has a braking section that applies force to the disc section to brake the rotation of the blowout fan, and the amount of rotation of the blowout fan is adjusted by changing the amount of force applied by the braking section to the disc section, thereby adjusting the blowout volume.

6. a blowout amount adjusting unit that adjusts the amount of air blown out from the blowout unit; 5. The vacuum cleaner nozzle according to claim 1, wherein the blowout amount adjusting portion adjusts the blowout amount by covering all or part of the blowout air inlet.

7. a blowout amount adjusting unit that adjusts the amount of air blown out from the blowout unit; 5. A vacuum cleaner nozzle as described in any one of claims 1 to 4, characterized in that the rotation amount of the suction fan and the blow-out fan is adjusted by moving the position of the rotation axis of the suction fan and changing the amount of the suction airflow passing outside the outer periphery of the rotation area of ​​the suction fan, thereby adjusting the rotation amount of the suction fan and the blow-out fan and adjusting the blow-out amount.

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