JP2012217782A - Air suction/blowing device and vacuum cleaner using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide technique allowing effective and reliable use of a blower function by a configuration allowing a changeover between a vacuum function and the blower function of a vacuum cleaner and stable maintenance of the blower function.SOLUTION: The air suction/blowing device includes: a suction chamber 15 applied with suction force; a blowing flow passage part 12 having a blowing port for blowing air; a power fan 14b disposed in the suction chamber 15; a blowing fan 14a disposed in the blowing flow passage part 12; a fan rotation shaft 14c mounted on both the fans; a bearing a 18 provided on the suction chamber 15 side, and holding a shaft end part on the power fan 14b side; a bearing b 20 holding a shaft end part on the blowing fan 14a side; and a lid body 19 holding the bearing b 20, and covering a part of the outer shell of the blowing flow passage part 12. The lid body 19 is disposed such that the lid body can move in a free floating manner in an upper part of the blowing flow passage part 12 to automatically align and hold the axis of the fan rotation shaft 14c at the optimal position, so that vibration noise and reduction of a fan rotation speed during fan rotation can be suppressed.

Description

  The present invention relates to an air suction / injection device that blows off dust by injecting air and a vacuum cleaner using the same.

  A general vacuum cleaner has a function of sucking dust together with air by sucking air (hereinafter referred to as “vacuum function”). A configuration having a function of blowing (hereinafter referred to as “blower function”) has also been proposed. If the vacuum cleaner has a blower function, it is difficult to see for the user (the back side of the installed furniture, the top surface, etc.) or a high position as seen from the user (the top surface of the furniture, the umbrella of lighting, It becomes possible to clean the dust on the ceiling.

  As a specific configuration, for example, Patent Document 1 includes a suction fan that operates by a suction force, an injection fan that generates an injection force, and a power transmission unit that transmits the power of the suction fan to the injection fan. An air suction / injection device is disclosed. As the power transmission means, a suction fan and an injection fan are provided on the same shaft, and both ends thereof are rotatably held by bearings fixed to the outer shell. According to this configuration, the injection fan can be rotated by the suction force of the vacuum cleaner simply by connecting the air suction / injection device to the suction hose. Therefore, a blower function that does not use exhaust can be additionally used regardless of the type of vacuum cleaner.

JP 2000-217746 A

  However, in the above-described conventional configuration, the bearings for holding the suction fan and the injection fan are integrally provided on the outer shell, and when each fan operates when the balance of each fan is inclined, the shaft cannot be aligned. However, since the rotation speed reaches 10,000 rotations or more, there is a problem that the vibration noise increases or a large vibration is transmitted to the outer shell.

  The present invention solves the above-described conventional problems, and is used by suppressing abnormal noise and vibration that cause discomfort to the user by automatically aligning the bearing portion that holds the shaft according to the balance amount of the fan. It aims at providing the technique which can improve property.

In order to solve the above-described conventional problems, an air suction / injection device of the present invention is connected to and connected to a suction path provided in a vacuum cleaner, and one end forms a rear end opening connected to the suction path. In addition, the other end has a tip opening, the inside of which is a tubular main body having a main air flow path, an injection air introduction port for introducing air from the outside, and an injection port for injecting the introduced air to the outside. And an inside of the main body portion that is a sub-flow passage that extends from the jet air introduction port to the jet port, and the main flow passage by suction of air through the suction passage. A power fan that is rotated by a suction air flow formed in the nozzle, and is provided inside the injection flow path section, and rotates in conjunction with the power fan, and the sub-flow path from the injection air introduction port to the injection port Create a jet of air flow toward An injection fan, a fan rotation shaft for attaching the power fan and the injection fan together, an internal suction port provided in the main flow path in the main body, housing the power fan therein, and facing the main flow path; A suction chamber having a suction air introduction port for introducing air from the outside; a flow path switching unit that permits or restricts injection of the jet air flow from the injection port to the outside; and the fan provided on the suction chamber side A bearing a that holds the end of the rotating shaft on the side of the power fan, a bearing b that holds an end of the fan rotating shaft on the side of the injection fan, the injection air inlet is formed, and the bearing b is held And a cover body that covers a part of the outer shell of the ejection flow path section, and the lid body is arranged so as to be freely movable above the ejection flow path section.

  As a result, one of the bearings is freely movable, and the bearing portion that holds the shaft by rotation automatically aligns, so that the shaft misalignment due to the combination of the bearing holding components and the rotation balance between the power fan and the injection fan can be reduced. It is possible to suppress a large vibration sound that is generated when the vehicle is tilted and a large vibration that is transmitted to the outer shell, and it is possible to improve the usability without causing the user to feel uncomfortable. In addition, after the automatic alignment, the shaft center at the position where the fan efficiency is the best is maintained, so that the rotation speed of the fan can reach the maximum value and the performance can be maintained. It becomes less and less durable.

  In the air suction / injection device, an opening is provided at an upper portion of the injection flow path portion, and a predetermined gap is provided between an opening edge of the opening and the lid, and the predetermined gap is generated when the fan rotates. What is necessary is just to set it as the clearance gap each provided in the clearance gap of the direction of an axis | shaft, and the clearance gap substantially perpendicular to the said fan rotating shaft direction.

  According to the above configuration, the optimum value is set for the gap in the direction of the fan rotation axis and the gap in the direction substantially perpendicular to the fan rotation axis direction. In order to automatically align the bearing b20 that holds the rotating shaft 14c, it is possible to suppress abnormal noise and vibration that cause discomfort to the user, and to keep the shaft center at the position where the fan efficiency is best. The fan rotation speed is stable, stable performance can be maintained, and the durability is also excellent.

  In the air suction / injection device, an outer shell provided so as to cover the lid and the injection flow path portion, and a packing member may be installed between the outer shell and the lid.

  According to the above configuration, the lid moves to a place where the shaft can be most balanced, and is then held lightly by the packing, so that the number of rotations of the fan can be maximized without performing the balance adjustment after the next time. As a result, it is possible to achieve a configuration in which performance is easily extracted to the maximum. In addition, the packing member is air permeable or has a ring shape so that a ventilation path to the blast air inlet can be secured.

  The present invention also includes a vacuum cleaner comprising the air suction / injection device and a suction hose provided with the air suction / injection device. In the vacuum cleaner which concerns on this invention, although the said air suction injection apparatus should just be connected to the said suction hose, Preferably, it is connected with respect to the said suction hose so that attachment or detachment is possible.

  The air suction / injection device of the present invention and the vacuum cleaner using the same have a shaft center formed by a combination of bearing holding parts by allowing one of the bearings to move freely and automatically aligning the bearing portion holding the shaft. It is possible to suppress a large vibration noise generated when the power balance between the power fan and the injection fan is tilted, and a large vibration transmitted to the outer shell, and the usability without causing discomfort to the user. Can be improved. In addition, since the center is maintained by automatically aligning the position where the fan efficiency is highest according to each individual air suction / injection apparatus, the fan rotation speed becomes the maximum value and the performance can be maintained.

The perspective view which shows an example of a vacuum cleaner provided with the air suction injection apparatus in embodiment of this invention Sectional drawing which shows an example of an internal structure at the time of vacuum (at the time of formation of a suction air flow) in an air suction / injection apparatus from the side The side view which shows an example of the state at the time of blower (at the time of formation of an injection air flow) in an air suction injection device The perspective view which shows an example of the state which attached | subjected the suction nozzle to the air suction injection apparatus similarly In the air suction / injection apparatus, a partial enlarged cross-sectional view of the injection flow path portion and the suction chamber Sectional drawing shown from the side which shows an example at the time of blower (at the time of formation of an injection air flow) in an air suction injection device Similarly, in the air suction / injection apparatus, a diagram showing the relationship between abnormal noise due to vibration and shaft rotation speed when the gaps T1 and T2 between the lid and the opening edge of the injection flow path portion are changed.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference symbols throughout the drawings, and redundant description thereof is omitted. Note that the present invention is not limited to the embodiments.

(Embodiment)
[Configuration example of vacuum cleaner]
An example of a vacuum cleaner provided with the air suction / injection device in the embodiment of the present invention will be specifically described with reference to FIG.

  As shown in FIG. 1, an air suction / injection device 8 according to the present embodiment is provided in a typical canister type vacuum cleaner 1. That is, the canister type vacuum cleaner 1 (hereinafter simply referred to as the vacuum cleaner 1) includes a vacuum cleaner body 2, a suction hose 3, a hand operating unit 4, a suction extension pipe 5, a suction port body 6, and a suction nozzle 7. And an air suction / injection device 8.

  The vacuum cleaner body 2 includes an electric blower 29, a dust collection chamber 30, and a power cord 32, and one end of the suction hose 3 is detachably connected via a connection pipe 31. A hand operating section 4 is provided at the other end of the suction hose 3, and one end of the suction extension pipe 5 is detachably connected to the tip of the hand operating section 4. Further, a suction port body 6 is detachably attached to the other end of the suction extension pipe 5. A suction path is formed by a series of internal passages of the dust collection chamber 30, the connection pipe 31, the suction hose 3, the suction extension pipe 5, and the suction port body 6 that communicate with the suction side of the electric blower 29.

  A suction nozzle 7 and an air suction / injection device 8 are detachably attached below the hand operation unit 4, and the suction nozzle 7 and the air suction / injection device 8 are connected to the hand operation unit in place of the suction extension pipe 5. 4 can be attached to the tip. It can also be attached to the tip of the suction extension tube 24.

  The vacuum cleaner body 2 is provided with an electric blower 29 and a dust collection chamber 30 inside, and suction force is generated by the operation of the electric blower 29, and the suction port body 6 is connected via the suction hose 3 and the suction extension pipe 5. A suction force is generated at a suction port (not shown).

When using the vacuum cleaner 1, the hand operating unit 4 is operated to turn on the cleaner body 2. Thereby, since suction force is generated at the suction port of the suction port body 6 by the operation of the electric blower 29, dust on the floor is sucked and collected via the suction extension pipe 5, the suction hose 3, and the connection pipe 31. Collected in chamber 30.

  The user changes the area of the floor surface to be cleaned by grasping the hand operation unit 4 and moving the position of the suction port body 6 on the floor surface.

  When it is desired to clean a narrow area such as a corner of a room, a gap such as furniture, not the floor surface, the suction extension pipe 5 or the suction port body 6 is removed and cleaning is performed. Furthermore, (1) cleaning at a position that is difficult for the user to see or at a high position, (2) cleaning dust adhering to the surface to be cleaned or collecting in the back of the uneven portion, (3) damage if the suction port is brought close to the surface. In addition, when it is desired to clean an object that may cause undesired movement, erroneous operation, or erroneous suction, the blower function can be suitably used in addition to the normal vacuum cleaning (vacuum function cleaning). . Therefore, the suction extension pipe 5 or the suction port body 6 is removed, and an air suction / injection device 8 is attached instead, and cleaning is performed.

  The specific configuration of the vacuum cleaner 1, that is, the vacuum cleaner body 2, the suction hose 3, the hand operation unit 4, the suction extension pipe 5, the suction port body 6, etc. is not particularly limited and is known in the field of vacuum cleaners. Various configurations can be suitably used.

  For example, in a handheld portable vacuum cleaner that is used by holding the vacuum cleaner body by hand, the air suction / injection device 8 can be detachably connected to the suction port of the vacuum cleaner body, and the air suction / injection device in the suction path By arranging 8, the same effect as the canister type vacuum cleaner 1 can be obtained.

[Configuration of Air Suction / Injection Device]
Next, a specific configuration of the air suction / injection device 8 according to the present embodiment will be described with reference to FIGS.

  The air suction / injection device 8 according to the present embodiment includes a main body unit 11, an injection channel unit 12, a lever member 13, a fan unit 14, a suction chamber 15, and a channel switching unit 16. Further, a suction nozzle 7 having a brush at the tip can be attached to the air suction / injection device 8.

  The main body 11 is substantially tubular, and the inside thereof is a main air flow path. Both ends of the main body 11 are respectively a front end opening 11a and a rear end opening 11b. The front end opening 11a is configured as an opening to which the suction nozzle 7 can be attached, and the rear end opening 11b is It can be attached to the hand operating unit 4. The front end opening 11a and the rear end opening 11b are preferably formed in a tapered shape. Thereby, it becomes easy to attach or detach the suction nozzle 7 or the hand operation part 4 to the outer periphery of the front end opening part 11a or the rear end opening part 11b.

  The injection flow path part 12 is provided so as to be integrated with the main body part 11 in a positional relationship inclined with respect to the tube axis direction of the main body part 11. The inside of the injection flow path part 12 is a subflow path of air, and the subflow path is configured to be connected to the tip opening 11a. Further, a lid body 19 provided with an ejection air inlet 12a is provided at the upper part of the ejection flow path section 12.

  The air suction / injection device 8 is basically attached to the hand operating portion 4 at the tip of the suction hose 3 with the injection flow path portion 12 positioned upward. Therefore, in the following description, the side where the injection flow path section 12 is located is referred to as “upper”, and the opposite side is referred to as “lower”. In addition, the side where the front end opening 11a is located is referred to as “front end”, and the side where the rear end opening 11b is located is referred to as “rear end”.

  A portion of the ejection flow path portion 12 that is exposed upward from the main body portion 11 extends so as to be inclined with respect to the tube axis direction of the main body portion 11. A lid body 19 is provided in which an injection air introduction port 12a is disposed with a predetermined gap from the opening periphery 12e of the opening 12d of the flow path portion 12. The jet air inlet 12a is an opening inlet for allowing air to flow into the jet flow path portion 12, that is, the sub flow path.

  A plurality of suction force adjusting holes 11 c are provided along the outer periphery of the main body 11 at the lower side of the main body 11, that is, on the opposite side of the injection flow path 12 across the main body 11. Yes. In the suction force adjusting hole 11c, the front end opening 11a closes the main flow path of the main body 11 due to dust suction or suction, and the inflow of air becomes below a certain level, so that the load on the vacuum cleaner 1 is reduced. This is for taking outside air into the main flow path other than the tip opening 11a so as not to be excessive.

  The lever member 13 includes a switching lever 13a, a lever support portion 13b, and an air introduction lid member 13c. A lever support portion 13b is positioned between the switching lever 13a and the air introduction lid member 13c, and this lever support portion 13b serves as a rotation shaft that is rotatably held in a state of penetrating the main body portion 11. Yes.

  Further, as will be described later, a flow path switching unit 16 is attached to the lever support portion 13b, and the flow path switching unit 16 can be switched by operating the switching lever 13a.

  The switching lever 13a has a frame shape positioned so as to cover the lower side of the main body part 11, but the air introduction lid member 13c can open and close the suction air introduction port 15b provided on the side surface of the main body part 11. It is a plate-like material that closes. Since the switching lever 13a is urged to the front end side by an elastic member such as a spring, the air introduction lid member 13c is basically located on the rear end side.

  As will be described later, since the lever member 13 rotates about the lever support portion 13b, if the switching lever 13a is moved to the rear end side, the air introduction lid member 13c moves to the front end side. At this time, the suction air introduction port 15b closed by the air introduction lid member 13c is opened. Further, when the switching lever 13a is sufficiently moved to the rear end side, the air introduction lid member 13c is configured not to move to the front end side more than necessary because it abuts against a part of the lower surface of the main body 11 and stops. ing.

  Inside the air suction / injection device 8, as shown in the longitudinal sectional view of FIG. 2, a main flow path 9 constituted by the inside of the main body part 11 and a sub flow path 10 constituted by the inside of the injection flow path part 12. And a suction chamber 15 facing the main flow path 9 below the injection flow path section 12. The ejection flow path section 12 and the suction chamber 15 are adjacent to each other and integrated, and a fan section 14 is provided in the interior. In other words, the injection flow path part 12 and the suction chamber 15 are fan part accommodating parts, and the suction chamber 15 is a power fan accommodating part. Further, an internal suction port 15 a is provided at a portion facing the main flow path 9 in the suction chamber 15, and a suction air introduction port 15 b connected to the outside of the main body 11 is also provided as will be described later. .

  The fan unit 14 includes an injection fan 14a positioned in the injection flow path unit 12, a power fan 14b positioned in the suction chamber 15, and a fan rotating shaft 14c that rotatably supports these fans. . The jet fan 14a forms a jet air flow that flows in the sub-flow channel 10 toward the tip opening 11a. Since the power fan 14b shares the fan rotation shaft 14c with the spray fan 14a, the power fan 14b is configured to rotate in conjunction with the spray fan 14a.

The fan unit 14 is configured to be rotatable by being held by the respective bearings above and below the fan rotation shaft 14c. The fan rotation shaft 14c on the power fan 14b side, which is the lower side of the fan unit 14, is held by a bearing a18 fixed on the suction chamber 15 side. Also, the fan rotation shaft 14c on the side of the ejection fan 14a, which is the upper side of the fan section 14, is a lid that is provided freely on the upper portion of the ejection flow path section 12 so as to be substantially perpendicular to the axial direction of the fan rotation shaft 14c. The structure is held by the body 19 and a bearing b20 fixed to the lid body 19.

  As shown in FIGS. 4 and 5, the lid body 19 is movable above the injection flow path portion 12 with a predetermined gap around the opening periphery 12 e of the opening 12 d of the injection flow path portion 12. The predetermined gaps are provided in a gap T1 in the axial direction of the fan rotation shaft 14c and a gap T2 in a direction substantially perpendicular to the axis.

  Then, the bearings b20 that support the fan rotation shaft 14c and the claw engagement portions 12f provided at several locations on the injection flow path portion 12 ensure the clearances T1 and T2 and the lid body 19 in the direction of the fan rotation shaft 14c. It is regulated not to come off.

  Further, as shown in FIG. 6, an outer portion 21 having a plurality of ventilation holes 21 b is provided so as to cover the lid 19 and the injection flow path portion 12. A packing member 22 configured to allow suction air from the plurality of ventilation holes 21b to pass through the blast air introduction port 12a is disposed between the outer shell portion 21 and the lid body 19. The specific operation of the fan unit 14 will be described together with the formation of a jet air flow to be described later.

  As described above, the main flow path 9 and the sub flow path 10 are respectively configured by the inside of the main body portion 11 and the injection flow path portion 12, and the sub flow path 10 joins at a position on the tip side of the main flow path 9. Yes. When viewed from the front end opening portion 11 a, the main channel 9 (main body portion 11) extends in a substantially straight direction, but the sub-channel 10 has an acute angle with respect to the main channel 9 in the middle of the main channel 9. Branches in the direction it has. If this state is expressed not on the basis of the main flow path 9 and the sub flow path 10, but on the basis of the main body 11 and the injection flow path section 12, the injection flow path section 12 is connected to the sub flow path 10 inside thereof. Is provided in the main body 11 so as to merge with the main flow path 9 inside the main body 11. Further, since the sub-flow channel 10 merges with the main flow channel 9, the tip opening portion 11 a in the main body portion 11 also serves as an injection port in the injection flow channel portion 12.

  Further, a flow path switching unit 16 is provided at a portion where the main flow path 9 and the sub flow path 10 merge. The flow path switching unit 16 may be configured to switch at least the connection or blocking of the sub flow path 10 with respect to the tip opening 11a, but in the present embodiment, the main flow path 9 or An alternative switching is performed so that one of the sub flow paths 10 is connected.

  Specifically, the flow path switching unit 16 is a substantially plate-like valve member, and one end thereof is fixedly supported by the lever support unit 13b. Therefore, by operating the switching lever 13a, the flow path switching unit 16 swings in the region of the merging site with the lever support portion 13b as a fulcrum. Therefore, the swing angle of the flow path switching unit 16 can be freely changed by operating the switching lever 13a.

  Here, if the confluence part in the main flow path 9 is defined as “main body confluence 11d” as shown in the area surrounded by the broken line, and the confluence part in the sub flow path 10 is defined as “injection confluence 12b”, the valve The channel switching unit 16 that is a member changes the angle (swings) so as to close one of the main channel 9 and the sub channel 10 by operating the switching lever 13a. In the configuration shown in FIG. 2, the flow path switching unit 16 is in a state where the injection junction 12 b is closed.

Further, the flow path switching unit 16 is provided at any of the main body junction port 11d and the injection junction port 12b.
The stoppers 11e and 12c are provided to stop the movement of the flow path switching unit 16 at a predetermined position so that the oscillation does not reach the position beyond the closed state.

  The specific configurations of the air suction / injection device 8 and the suction nozzle 7 according to the present embodiment are not particularly limited, and the main body 11, the injection flow path 12, the lever member 13, the fan 14, the suction chamber 15, and the flow path The switching part 16 etc. should just be able to manufacture using a well-known member, material, shape, etc. in the field | area of a vacuum cleaner or the field | area of household appliances widely.

[Operation of air suction / injection device]
Next, the operation of the air suction / injection apparatus 8 having the above-described configuration, particularly the details of the function (blower function) for ejecting the jet air flow from the suction port 23, and the function for performing the blower function and normal suction (vacuum) Switching to (function) will be described.

  First, the air suction / injection device 8 can be used by directly attaching to the hand operation unit 4 provided at the tip of the suction hose 3. That is, the user removes the suction extension tube 5 from the state where the suction extension tube 5 and the suction port body 6 are attached to the hand operation unit 4 (see FIG. 1), and attaches the air suction / injection device 8 instead. Use as In addition, the suction nozzle 7 is attached to the air suction / injection device 8, and the operation of the air suction / injection device 8 will be described based on this state in the following description.

  Next, a normal vacuum function will be described. In the air suction / injection device 8, since the switching lever 13a is in a steady state located on the tip side, the flow path switching unit 16 closes the injection confluence 12b at the confluence portion of the main flow path 9 and the sub flow path 10. The main body junction port 11d is opened. When a suction force is generated by the operation of the cleaner body 2, the suction force reaches the main flow path 9 and the suction nozzle 7 via the suction hose 3. Therefore, the outside air is sucked from the suction port 23 as shown by the thick arrow in the figure, and a suction air flow is formed in the main flow path 9 from the front end opening 11a toward the rear end opening 11b.

  Next, switching to the blower function will be described. When the user performs an operation to move the switching lever 13a to the rear end side, the air introduction lid member 13c moves to the front end side, so that the suction air introduction port 15b closed by the air introduction lid member 13c is opened. . Further, in the joining portion of the main passage 9 and the sub-passage 10, the passage switching unit 16 moves from a position where the injection joining port 12b is closed to a position where the main body joining port 11d is closed. As a result, the injection junction 12b is opened, so that the sub-flow channel 10 is connected to the tip opening 11a, but the main channel 9 is blocked from the tip opening 11a. The suction force generated in the vicinity of the rear end opening 11b sucks the air inside the suction chamber 15 from the internal suction port 15a.

  At this time, since the opened suction air inlet 15b is connected to the suction chamber 15, the inside of the suction chamber 15 is connected to the outside air. Therefore, a suction air flow is formed toward the suction air introduction port 15b, the suction chamber 15, and the internal suction port 15a. This suction air flow flows from the rear end opening 11 b toward the suction hose 3 through the main flow path 9. And since the power fan 14b is provided in the inside of the suction chamber 15, this power fan 14b rotates by the effect | action of a suction air flow.

  Furthermore, since the power fan 14b shares the fan rotation shaft 14c with the ejection fan 14a, the ejection fan 14a also rotates as the power fan 14b rotates.

At this time, in the conventional configuration, since the bearing for holding the suction fan and the injection fan is integrally provided in the outer shell, the vibration noise is increased or a large vibration is transmitted to the outer shell. According to the present invention, when the fan is used for the first time, the bearing b20 is held and freely movable according to the state in which the center of the fan rotation shaft 14c differs depending on each product solid depending on the balance state and shaft state of each fan. The arranged lid body 19 moves so as to automatically align with an appropriate center axis position of the fan rotation shaft 14c. As a result, since the central axis is fixed at a position where the amount of attenuation of the force used for operating each fan most is small, the maximum number of revolutions in each product solid can be obtained.

  In the next operation, the lid 19 is pressed down by the packing member 22, so that it is fixed at a position close to the optimum axial center position, so that the start up to the maximum rotational speed is performed smoothly and the performance is maintained at the highest level. can do.

  The centering movement by the lid body 19 can be realized because the lid body 19 is floating in the upper part of the ejection flow path portion 12 with a predetermined gap in the opening peripheral edge 12e of the opening portion 12d of the ejection flow path portion 12. This is because the predetermined gaps are provided in the gap T1 in the axial direction of the fan rotation shaft 14c and the gap T2 in a direction substantially perpendicular to the axis.

  The experiment was repeated to optimally set the values of the gaps T1 and T2, and the results as shown in FIG. 7 were obtained. As evaluation items, the noise reduction effect due to vibration and the shaft rotation speed UP were increased, and evaluations (O, Δ, × evaluation) were performed on these items, and comprehensive judgment was made to derive the optimum setting value.

  As a result, if the axial gap T1 is within a range of 0.05 mm to 1.4 mm, the vibration noise due to the alignment operation and the shaft rotation speed UP are fixed (the vibration noise and the shaft rotation speed UP). It was confirmed that at least one item was evaluated as Δ. Furthermore, it was confirmed that even within the range of 0.05 mm to 1 mm, still a high effect (there is an o evaluation for at least one item of vibration abnormal noise and shaft rotation speed UP) can be confirmed.

  Further, if the clearance T2 in the direction substantially perpendicular to the shaft is within the range of 0.1 mm to 1.1 mm, the vibration noise due to the alignment operation and the shaft rotation speed UP will have a certain effect (vibration noise and shaft). It was confirmed that a △ evaluation was obtained for at least one item of the rotational speed UP. Furthermore, it was confirmed that even within the range of 0.1 mm to 0.8 mm, still a high effect (there was an o evaluation for at least one item of vibration noise and shaft rotation number UP) was obtained.

As a result of further changing the values of the gaps T1 and T2 and combining them, the optimum setting range in which ◯ evaluation is obtained for both evaluations of vibration noise and shaft rotational speed UP is as follows.
It was confirmed that (gap T1) was in the range of 0.1 mm to 0.5 mm (gap T2) was in the range of 0.2 mm to 0.5 mm.

  In this way, by setting the setting when the values of the gaps T1 and T2 are combined within the above optimal setting range, the shaft misalignment due to the combination of the bearing holding parts, the balance state of each fan, and the shaft holding state ( According to the balance amount generated due to the state where the shaft center of the fan rotation shaft 14c varies depending on each product solid), an operation of automatically aligning the bearing b20 holding the fan rotation shaft 14c is born, and each fan rotates. The central axis is fixed at a position where the amount of attenuation of force used for operation is the smallest.

  As a result, it is possible to improve usability by suppressing abnormal sounds and vibrations that cause discomfort to the user, and to maintain the shaft center at the position where the fan efficiency is the best, so the fan speed is stable at a high value. In addition, stable blower performance can be maintained.

In the next operation, the lid 19 is pressed down by the packing member 22, so that it is fixed at a position close to the optimum axial center position, so that the start up to the maximum rotational speed is performed smoothly and the performance is maintained at the highest level. can do.

  In the above state, the injection fan 14a is provided in the injection flow path section 12, so that an injection air flow is formed in the sub flow path 10, and the injection air flow flows into the suction nozzle 7 from the tip opening portion 11a. Injected from the suction port 23.

  If the user releases the state in which the switching lever 13a is moved to the rear end side, the switching lever 13a moves from the rear end side to the front end side and returns to the original position. Accordingly, the air introduction lid member 13c closes the suction air introduction port 15b, and the flow path switching unit 16 moves from a position where the injection junction 12b is opened to a position where the main body junction 11d is opened. Therefore, the auxiliary flow path 10 is blocked from the front end opening 11a, and the main flow path 9 is connected to the front end opening 11a. Therefore, the rotation of the power fan 14b and the injection fan 14a is stopped, and the injection that has been injected from the suction port 23 is performed. Air flow is also stopped. Further, since a suction air flow is formed in the main channel 9, a suction force is generated again at the suction port 23.

  As described above, in the present embodiment, it is possible to jet the jet air flow from the tip opening 11a simply by switching the flow path switching unit 16 by operating the switching lever 13a. Therefore, when using the vacuum cleaner 1, it is possible to easily eject the jet air flow from the tip of the suction nozzle 7 without using a complicated configuration. Moreover, since the blower function can be stopped and returned to the vacuum function by simply returning the switching lever 13a to the original, not only the operability is improved, but the vacuum function and The blower function can be switched appropriately.

  In addition, when the blower function is used, the rotation speed of the fan unit 14 has the most influence on the performance, and the axis center of the fan unit 14 can be automatically adjusted so that the most rotational force is generated. By having a structure that makes it easy to demonstrate the performance of the blower function by having a structure, the structure of the fan part 14 can be maximized in the next use by holding the shaft center in a simple way in the product The blower function can be highly reliable.

  Moreover, in this Embodiment, although the canister type vacuum cleaner 1 (refer FIG. 1) is illustrated as a vacuum cleaner, of course, this invention is not limited to this, It is a canister type. Also, a configuration different from that of the vacuum cleaner 1 can be used, or an upright type vacuum cleaner, a handy type vacuum cleaner, or the like can be used. Furthermore, the air suction / injection device 8 according to the present embodiment is detachable from the suction hose 3 (hand operation unit 4), but is not limited thereto, and the suction hose 3 (hand operation unit) is not limited thereto. 4) etc. may be integrated with a part of the main body of the suction device.

  The present invention is not limited to the description of each of the embodiments described above, and various modifications can be made within the scope of the claims, and different embodiments and a plurality of modifications can be used. Embodiments obtained by appropriately combining the disclosed technical means are also included in the technical scope of the present invention.

  The present invention is suitable for the field of various types of vacuum cleaners, whether for home use or business use, and for canister type and upright type, if the blower function is to be used together with the vacuum function. Can be used.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner 3 Suction hose 8 Air suction injection apparatus 9 Main flow path 10 Subflow path 11 Main body part 11a Front end opening part 11b Rear end opening part 12 Injection flow path part 12a Injection air introduction port 12d Opening part 12e Opening part periphery 14a Injection Fan 14b Power fan 14c Fan rotation shaft 15 Suction chamber 15a Internal suction port 15b Suction air introduction port 16 Flow path switching unit 18 Bearing a
19 Lid 20 Bearing b
21 Outer part 22 Packing material

Claims (5)

Connected to the suction path of the vacuum cleaner,
A tubular main body part, one end of which forms a rear end opening connected to the suction path and the other end forms a front end opening, the inside of which is a main air flow path;
An injection flow path section having an injection air introduction port for introducing air from the outside and an injection port for injecting the introduced air to the outside, the inside of which is a sub-flow path from the injection air introduction port to the injection port When,
A power fan provided inside the main body and rotated by a suction air flow formed in the main flow path by suction of air through the suction path;
An injection fan that is provided inside the injection flow path section, rotates in conjunction with the power fan, and forms an injection air flow from the injection air introduction port toward the injection port in the sub flow path;
A fan rotation shaft to which the power fan and the injection fan are attached together;
A suction chamber provided in the main flow path in the main body portion, containing the power fan therein, and having an internal suction port facing the main flow path and a suction air introduction port for introducing air from the outside;
A flow path switching unit that permits or restricts injection of the jet air flow from the injection port to the outside;
A bearing a that is provided on the suction chamber side and holds an end of the fan rotation shaft on the power fan side; a bearing b that holds an end of the fan rotation shaft on the injection fan side;
A cover body in which the injection air introduction port is formed and holding the bearing b and covering a part of the outer shell of the injection flow path section;
An air suction / injection device, wherein the lid is arranged so as to be freely movable in an upper portion of the injection flow path portion. An opening is provided at an upper portion of the ejection flow path portion, a predetermined gap is provided between an opening edge of the opening and the lid, and the predetermined gap is a gap in the direction of the fan rotation shaft, The air suction / injection device according to claim 1, wherein the air suction / injection device is a gap provided in each of the gaps substantially perpendicular to the fan rotation axis direction. The air suction / injection device according to claim 1 or 2, wherein a packing member is installed between an outer shell provided so as to cover the lid and the injection flow passage, and the outer shell and the lid. A vacuum cleaner comprising: the air suction / injection device according to claim 1; and a suction hose provided with the air suction / injection device. The vacuum cleaner according to claim 4, wherein the air suction / injection device is detachably connected to the suction hose.