WO2017211002A1

WO2017211002A1 - Portable blowing-suction machine

Info

Publication number: WO2017211002A1
Application number: PCT/CN2016/095088
Authority: WO
Inventors: 杨越
Original assignee: 杨越
Priority date: 2016-06-11
Filing date: 2016-08-14
Publication date: 2017-12-14
Also published as: CN106087825A

Abstract

A blowing-suction machine, comprising a main machine housing (2), a motor (3) arranged inside the shell, a fan (4) driven to rotate by the motor, a switch (7) for controlling the rotation of the motor (3), and an air suction pipe (11) and an air blowing pipe (12) arranged in the main machine housing (2), the air suction pipe (11) being provided with a main body part (14a) extending along the longitudinal axis line (Z1), the extension tail end of the main body part (14a) of the air suction pipe (11) being provided with a bent part (14b) arranged at an angle (β) with the longitudinal axis line (Z1), the bent part (14b) having a bent part axis line (Z2), the bent part (14b) extending from a bent position along the bent part axis line (Z2), an extension tail end of the air blowing pipe (12) being flush with the bent position of the air suction pipe (11); in an air suction mode, an air inlet (11a) of the air suction pipe (11) is nearest the ground, and the air inlet (11a) and an air outlet (11b) of the air blowing pipe (12) are basically kept on the same horizontal plane. The arrangement of the structure of the blowing-suction machine in this way makes single hand operation easier and more convenient, and dust suction effects better.

Description

Portable blower

Technical field

The invention relates to a hand-held operating device, in particular to a portable blowing machine.

Background technique

In the existing garden type blower, there are usually two ways of blowing and sucking the arm. One is that the blow pipe and the suction pipe connected to the main body casing are respectively provided with independent air flow passages, and the casing is provided with a conversion. The mechanism can effectively close the dust outlet or the blowing port, and realize the conversion from the blowing mode and the suction mode; the other is to set only a single airflow channel in the blowing pipe, that is, blowing and sucking two different working modes. The same air flow channel is used, and an air inlet is arranged on the casing, and the air inlet is effectively opened or closed by a certain mechanism, and the air blower can switch between the air blowing mode and the air suction mode.

A blower is disclosed in the patent specification of US Pat. No. 6,141,823. The main body casing is provided with a blowing pipe and an air suction pipe respectively. The blowing pipe and the suction pipe are parallelly extended and integrally connected, and the diameter of the blowing pipe is smaller. The diameter of the suction pipe is large, and the diameter of the suction pipe gradually decreases along the longitudinal direction, and the air blowing pipe and the suction pipe are respectively provided with a blowing channel and an air suction channel.

A blower is disclosed in the patent specification of US Pat. No. 6,735,813, the blower is a blower provided with a single cavity passage, and the blower can be rotated at a support position of the main body casing. The air inlet is arranged on the casing, and the suction pipe is rotated by 180 degrees, and the air suction pipe can effectively open or close the air inlet on the casing, thereby realizing the blowing and suction conversion.

The above-mentioned blowing or suction pipe with independent air flow passage or the suction pipe with single air flow passage must meet certain safety regulations in terms of length design, that is, the setting of the blowing and suction pipe should reach a certain length standard, especially for blowing. The suction pipe is a blower of a straight pipe, and the length of the blow pipe tends to be out of proportion with respect to the main casing, which affects the overall appearance, and it is not easy to carry a long blowing pipe during the blowing operation. The center of gravity is not easy to grasp, and the operation is very inconvenient.

Summary of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a blower that is light in operation, compact in structure, convenient in assembly, safe in performance, and capable of performing single handle operation.

The present invention is achieved by a blower comprising a main body casing, a motor disposed in the casing, a fan driven by the motor, a switch for controlling the rotation of the motor, and a blowing pipe connected to the main casing, sucking a wind pipe, the suction pipe is provided with a main body portion extending along a longitudinal axis, and a bent portion disposed at an angle with the longitudinal axis line is disposed at an extending end of the main body portion of the suction pipe; the suction pipe The angle between the main body portion and the bent portion is set to an obtuse angle.

A blower includes a main body casing, a motor disposed in the casing, a fan driven by the motor, a switch for controlling the rotation of the motor, and a blowing pipe and an air suction pipe disposed in the main casing, wherein the suction pipe is The curved pipe is disposed below the outer side of the suction pipe, and the pipe wall abuts against the outer wall of the suction pipe.

A blower includes a main body casing, a motor disposed in the casing, a fan driven by the motor, a switch for controlling rotation of the motor, and a blow suction pipe connected to the main casing, wherein the blower pipe is provided with a a body portion extending along the longitudinal axis and a bent portion disposed at an angle to the axis of extension of the suction duct.

The suction pipe is fixedly connected with the blowing pipe, and the suction pipe is located above the blowing pipe; the suction pipe is in the same direction as the blowing pipe, and the extending end of the blowing pipe is flat with the bending position of the suction pipe The air suction pipe and the air blowing pipe are connected to the main body casing; the safety air lock mechanism is arranged between the air suction pipe and the main body casing, and the switch can be connected when the air suction pipe is connected to the main body casing Triggered, the suction tube can be removed from the main unit housing only when the switch is open.

The blowing pipe is provided with an opening, and an air volume adjusting device is arranged on the outer wall of the blowing pipe near the opening position; an air guiding device is arranged between the suction pipe and the blowing pipe for guiding the opening from the opening a direction of the air flow; a first connecting portion of the operating handle is disposed on the main body casing, and the second connecting portion of the operating handle is disposed on the air suction pipe.

Compared with the prior art, the beneficial effect of the present invention is that since the first connecting portion of the operating handle is connected to the main body casing, the extending direction thereof is consistent with the extending direction of the blowing pipe, and the connecting portion has a certain extension length. The user can select different holding positions when performing one-hand operation of blowing and sucking different working modes. For users of different heights, the center of gravity of the blowing machine can also be grasped by selecting different holding positions. Therefore, the operation is more labor-saving; the blow-adsorbing member is detachably connected to the main body casing, and the second adsorbing portion is provided with a second connecting portion for holding or disassembling, so that the installation or disassembly is easier and more convenient, and at the same time, When the blowing suction machine is in the non-working state, the disassembly of the blowing adsorption member and the main body casing is beneficial to the collection and storage of the blowing suction machine; the setting of the safety interlocking mechanism makes the operation performance safe, and the bending setting of the suction air pipe makes the connection The weight of the machine is lighter, the operation is more convenient, and the vacuuming effect is more prominent.

DRAWINGS

The invention will now be further described with reference to the accompanying drawings and embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front elevational view of a blower of the present invention.

Figure 2 is a cross-sectional view of the blower of the present invention taken along the front view.

Fig. 3A is a cross-sectional view taken along line A-A of Fig. 1, in which the air volume adjusting mechanism is in a closed state.

Fig. 3B is a cross-sectional view taken along line A-A of Fig. 1, in which the air volume adjusting mechanism is in an adjusted state.

Figure 4 is a partially enlarged schematic view showing the state in which the safety interlock mechanism of Figure 2 is engaged.

Fig. 4A is a schematic view showing the initial state of the safety interlock mechanism when the blow-up member of the blower of the present invention is separated from the main body casing.

4B is a schematic view of the safety interlocking mechanism when the blow-up member of the blower of the present invention is attached to the main body casing.

4C is a schematic view showing the state in which the switch is triggered when the blow-up member of the blower of the present invention is attached to the main body casing.

Fig. 5 is a partial elevational view showing the state in which the main casing of the blower of the present invention is separated from the blow-adsorbing member.

Figure 6A is a schematic illustration of the operator performing a one-handed operation of the blower of the present invention in an inhaled state.

Figure 6B is a schematic illustration of the operator performing a one-handed operation of the blower of the present invention in a blown state.

among them:

1. Blowing suction machine 10. Blowing suction member 20, safety interlocking mechanism

2. Main body casing 11, suction pipe 21, trigger mechanism

2a, motor housing lla, air inlet 21a, contact

2b, volute 12, blow pipe 21b, stop

3, motor 12a, air outlet 21c, stop

4, fan 13, grille opening 22, slider

5. Operating handle 14a, main body portion 22a, shoulder portion

5a, the first connecting portion 14b, the bent portion 22b, the stop portion

5b, the first connecting portion 15, the dust pipe 23, the spring

6, wire 16, air volume adjustment device 24, locking mechanism

7. Switch 17. Blowing and suction conversion mechanism 24a, pressing part

8, opening 17a, control button 24b, hook

9, air guiding device 17b, adjusting the flap 25, spring

9a, guide surface 19, meshing portion X1 (X2), connecting shaft axis

9b, side baffle Z1, main body axis line Y, motor shaft line

9c, cross-belt Z2, bending center axis β, bending angle

detailed description

The present invention will be described in detail below with reference to the embodiments, but the scope of the invention is not limited to the following examples.

The present invention discloses a portable blower that performs one-hand operation, and the blower can switch between two different working modes of blowing and inhaling, and the operator can quickly realize the adjustment by simple and rapid adjustment. The blowing and suction conversion can also conveniently clean and maintain the fan and the volute, and ensure that the blowing machine can work under the safe state in the blowing and sucking working modes, and the assembly is extremely convenient, the structure is light, and the operation is simple. .

Referring to Figures 1 and 2, the blower 1 is provided with a main body casing 2 including a motor housing 2a accommodating the motor 3 and a volute 2b accommodating the fan 4, the impeller of the fan 4 having a leaf at a high speed rotation Crushing function, motor housing 2a and The volute 2b is fixedly connected, and the rear end of the motor casing 2a is connected with a wire 6 for supplying power to the motor 3. The lower end of the volute 6 is connected with a dust pipe 15, and the fan 4 can be rotated at a high speed under the driving action of the motor 3. A blowing airflow is generated in the volute 2b; the blowing member 10 is detachably connected to the main body casing 2 through a safety interlocking mechanism 20, and the blowing member 10 includes an air suction pipe 11 and a blowing pipe 12, wherein the air suction pipe 11 An air inlet 11a is provided, the air blowing pipe 12 is provided with an air outlet 12a; the first connecting portion 5a of the operating handle 5 is connected to the main body casing 2, and the second connecting portion 5b of the operating handle 5 is connected to the blowing member 10, The first connecting portion 5a is located above the main casing 2, and the second connecting portion 5b is located above the blowing member 10. When the blowing member 10 is coupled to the main casing 2, the two connecting portions are combined into a complete operating handle 5. .

a blow-up conversion mechanism 17 provided on the main body casing 2 at a position close to the dust discharge pipe 15, including a control button 17a disposed outside the main body casing 2, and an adjustment flap 17b located inside the main body casing 2, operating As long as the adjustment control 17a is performed in accordance with the direction indicated, the blower can be switched between different modes of operation of blowing and suction. Rotating the adjusting flap 17b to the solid line position shown in FIG. 2, the blowing machine 1 is in the blowing operation mode, and under the high-speed rotation of the fan 4, the suction airflow as shown by the arrow in FIG. 2 is generated to exit the suction duct 11 The air inlet 11a enters the air suction duct 11, and the inhaled airflow is sent to the air blowing pipe 12 through the fan 4, and finally blown out at the air outlet 12a; in order to express the airflow speed blown from the air outlet 12a in the air blowing mode, the air outlet is usually provided. The cross-section of the 12a is set to be much smaller than the cross-section of the air inlet 11a, and the cross-section of the blow pipe 11 has a gradual decreasing process along its extending direction; the rotation regulating flap 17b to the dotted line position shown in Fig. 2, the blowing machine l In the inhalation mode, the leaves, dust and the intake air flow are sucked into the suction duct 11 together with the air inlet, and then pulverized by the impeller of the fan 4 and then sent to the dust collecting pipe 15.

In a preferred embodiment of the present invention, the suction duct 11 is fixedly connected to the blowing pipe 12, and the blowing pipe 12 is located below the outside of the suction air 11; when the blowing machine is in the working state, the blowing adsorbing member 10 is connected to the main casing 2 The air suction pipe 11 and the air blowing pipe 12 extend toward one side of the fuselage, and the extending direction thereof is substantially parallel, and the extending direction of the dust discharging pipe 15 is substantially perpendicular to the extending direction of the air suction pipe 11 and the air blowing pipe 12; the air suction pipe 11 Is a curved tube provided with a main body portion 14a extending along the longitudinal axis Z1, and a bent portion 14b disposed at an angle β of the longitudinal axis line at the extending end of the main body portion of the suction duct, and The angle β of the axial line Z1 of the main body portion 14a and the axial line Z2 of the bent portion 14b is preferably an obtuse angle between 90 and 180 degrees, and the extension length of the bent portion 14b is set between 5 mm and 1 m. The extended end of the blowing pipe 12 is substantially flush with the bending position of the suction duct 11, and the bending portion 14b is disposed such that the suction pipe 11 has a reduced overall length of the suction pipe 11 under the condition of satisfying the safe length. The weight of the whole machine is also reduced; compared to the suction machine whose suction pipe is a straight pipe, the blowing is sucking The position of the center of gravity is lower, and the user can freely straighten the arm when performing the one-handed vacuum operation in the upright state, and the operation is also more relaxed; at this time, the air inlet 11a of the bent portion 14b of the suction duct 11 is close to the ground, and The air inlet 11a of the bent portion 14b and the air outlet 12a of the air blowing tube 12 are substantially maintained at the same horizontal plane. Referring to FIG. 6A, in the air suction mode, the projection height of the air suction tube 11 and the air blowing tube 12 in the vertical direction is h. It is roughly the same; for some places where vacuuming is required in special parts such as under the seat, the user can easily complete the operation without bending over, and the dust blowing effect is further improved. Of course, those skilled in the art It is conceivable that the suction duct 11 is arranged as a circular arc-shaped elbow having a larger diameter. The blowing pipe 12 is located below the outer side of the suction duct 11, and the wall of the tube abuts against the outer wall of the suction duct 11, and the blowing duct 12 can also be arranged. In a corresponding arc, the air inlet 11a of the air suction pipe 11 and the air outlet 12a of the air blowing pipe 12 are substantially maintained at the same horizontal plane under the air suction mode, that is, the air suction pipe 11 and the air blowing pipe 12 are in the vacuum operation mode. The projection height h in the vertical direction is substantially the same.

The upper portion of the blowing pipe 12 is provided with a pipe wall opening 8, and a blowing speed adjusting device 16 is disposed on the blowing pipe 12 near the opening 8 of the pipe wall for adjusting the wind speed blown from the air outlet 12a in the blowing mode, the suction pipe An air guiding device 9 is also disposed between the air blowing pipe 12 for guiding the flow direction of the airflow escaping from the pipe wall opening 8 so as to prevent the airflow from blowing the dust to the user, causing the line of sight to be blurred or inhaled. in vivo.

2 and 5, the axis line X1 of the first connecting portion 5a and the axis line X2 of the second connecting portion 5b and the motor axis line Y are in the same plane, and the extending direction of the operating handle 5 is blown again. The extending direction of the adsorbing member 10 is uniform, the length of the first connecting portion is longer than that of the second connecting portion 5b, and the length of the first connecting portion 5a is convenient for the user to perform in the blowing or sucking mode. With one-hand operation, for users of different heights, it is possible to select a suitable holding position from the first connecting portion 5a, thereby grasping the center of gravity of the blowing machine, making the operation easier, and the second connecting portion 5b is mainly used to hold the blow-up member 10 from the main body casing 2 or to be attached to the main body casing 2.

Referring to FIG. 3A and FIG. 3B, the wind speed adjusting device 16 is an annular body provided with a grill opening 13 rotatably supported on the outer wall of the blowing pipe 12, when the blowing of the blowing pipe needs to be adjusted. At the wind speed, the rotating annular body is adjusted according to the air volume adjustment indicator illustrated in FIG. 1 such that the grill opening 13 and the tube wall opening 8 all overlap or partially overlap, and part of the airflow escapes from the grill opening 13 through the tube wall opening 8. To adjust the size of the air outlet speed blown from the air outlet 12a; the guiding device 9 includes a guiding surface 9a disposed on the lower wall of the suction duct 11, and is located directly above the tube wall opening 8 and distributed on both sides of the guiding surface 9a The baffle 9b, and the crosspiece 9c on the rear side of the air volume guiding device 9 shown in Fig. 2, the airflow escaping from the grille opening 13 is blocked by the crosspiece 9c and the side baffles 9b, along the guide The surface 9a flows in the direction in which the blowing tube 12 extends, so that the flow direction thereof coincides with the direction of the air outlet of the blowing pipe, and the wind flow is prevented from blowing the dust to the user, and the blowing effect is also enhanced. When the blower air volume adjustment is not required, it is only necessary to rotate the wind speed adjusting device 16 so that the grille opening 13 is displaced from the pipe wall opening 8, and the pipe wall opening 8 is effectively carried out by the annular body of the wind speed adjusting device 16. Closed.

Referring to FIG. 4 and FIG. 5, a switch 7 for controlling a motor is disposed in the main body casing, and a safety interlock mechanism 20 includes a triggering device 21 slidably disposed with respect to the handle 5. The top end of the triggering device 21 protrudes from the handle The upper surface of the housing of the connecting portion 5a is convenient for the user to slide the control triggering device 21 from the first position indicated by the broken line to the second position indicated by the solid line in the direction indicated by the arrow in FIG. 4, the triggering device 21 includes The contact point 21a of the trigger switch 7 and the stopper portion 21bc and the stopper portion 21c, and a locking mechanism 24 provided with a pressing portion 24a protruding from the handle housing and for engaging with the blowing member 10 a hook 24b, a lower end of the locking mechanism 24 is provided with a spring 25, the spring 25 can The pressing portion 24a applies a force to move the locking mechanism 24 up and down in the main body casing, and a slider 22, the upper end of the slider 22 is provided with a stop portion 22b, and a middle portion is provided with a shoulder portion 22a, and the lower end of the slider 22 is also A spring 23 is disposed; a portion of the blower 10 of the blow-up member 10 that is connected to the main body casing 2 is provided with an overhanging block 18, and an inner side of the overhanging block 18 is provided with a mesh for connection with the hook 24b. Part 19.

Referring to FIG. 4A, when the blowing member 10 is separated from the main body casing 2, the slider 22 is in an initial state under the support of the spring 23, and at this time, the side of the stopper portion 22b of the slider 22 and the triggering device 21 are provided. The stop portion 21b abuts, preventing the sliding of the triggering device 21: at this time, the locking mechanism 24 can be moved downward in the main body casing by pressing the pressing portion 24a from the lower pressing force of the locking mechanism 24 to overcome the elastic force of the spring 25. When the locking mechanism 24 is in the lowered position, the hook 24b of the locking mechanism 24 can be easily engaged with the engaging portion 19 of the blowing member 10.

4 and 4B, when the blowing member 10 is attached to the main body casing 2, the overhanging block 18 of the blowing member 10 projects into the main body casing 2, just to the shoulder of the slider 22. The portion 22a interacts, and the shoulder portion 22a is driven by the overhanging block 18 to urge the slider 22 to slide downward against the elastic force of the spring 23, at which time the stop portion 22b of the slider 22 and the stop portion of the triggering device 21 The 21b is disengaged from each other, thereby allowing the triggering device 21 to slide from the first position in the direction indicated by the arrow in the figure, thereby actuating the switch 7 to activate the motor 3, and the triggering device 21 can be activated only when the blowing member is coupled to the main body housing. Referring to FIG. 4C, when the triggering device 21 is moved to the second position, at this time, the contact 21a of the triggering device 21 actuates the switch 7, and the stopper portion 21c of the triggering device 21 is located at the pressing portion 24a of the locking mechanism 24. Below, the locking mechanism 24 is prevented from moving downward, at which time the hook 24b of the locking mechanism 24 is in the meshing locking state with the engaging portion 19 of the blowing member 10, and the blowing member 10 cannot be used as long as the switch 7 is in the triggered state. Disassembled from the main body casing 2 to avoid work due to the blowing member In the state, it is dropped from the main body casing 2, and the fan 4 which rotates at a high speed is injured to the user, thus ensuring the safety of the blower l in the state in which the motor 3 is started up. Wherein, the upper end surface of the stopper portion 22b of the slider 22 is disposed as a slope, in consideration of the operator performing an erroneous operation, that is, not in the normal disassembly manner, first moving the trigger device to the first position in the non-trigger state, Then, the locking device 24 is pressed again to remove the blowing member 10, and the blowing member 10 is directly detached from the main body casing 2 by using brute force. At this time, the slider 22 is lifted up by the spring 23, The slope of the stopper portion 22b of the slider 22 moves the stopper portion 21b of the push trigger mechanism 21 to the first position of the non-trigger state, thereby effectively cutting off the operation of the motor and keeping it safe.

When it is necessary to detach the blowing member 10 from the main body casing 2, as long as the first position of the triggering device 21 to the non-triggering switch is slid, the pressing portion 24a of the locking mechanism 24 is disengaged from the stopper portion 21c of the triggering device 21 at this time. The pressing portion 24a can be pressed and moved downward, and the hook 24b of the locking mechanism 24 is disengaged from the engaging portion 19. At this time, the blowing member can be easily removed by operating the second grip 5b of the handle 5. 10, of course, the blow-up member 10 can be detached from the main body casing 2, and it is also advantageous to clean the volute 2b in the case where the volute 2b is blocked by debris such as dust and dust, thereby facilitating maintenance and maintenance of the fan 4. .

Of course, if necessary, the volute 2b and the motor housing 2a in the embodiment of the present invention can be movably connected, and the power unit for driving the fan 4 can also be replaced by a steam engine, an internal combustion engine or a battery pack; the blowing tube 12 and the suction tube The air ducts 11 can also be independently arranged, respectively connected to the main body casing, or the blowing pipe 12 and the air suction pipe 11 can be combined into a single air flow passage blowing air duct, and the blowing air duct is provided with an edge. a longitudinally extending main body portion and a bent portion disposed at an angle with the main body portion; the above-mentioned blow suction duct or the bent portion of the suction duct 12 may be arranged in a flat shape, a column shape, a cone shape, a trapezoidal shape or Any suitable bent body.

Referring further to FIG. 6A, the operator holds the handle of the blower with one hand to perform the vacuuming operation. Since the position of the center of gravity of the blower is relatively low, the arm of the operation grip operating handle 5 is kept substantially vertical, and is located at the suction pipe. 11 The air inlet 11a of the bent portion is close to the ground, and the external dust enters the dust suction pipe with the intake air flow, and finally is sent into the dust collecting bag by the fan, the operation process is extremely easy, and the dust collecting effect is also improved; referring to FIG. 6B The operator holds the handle of the blower with one hand to perform the dust blowing work. The position of the operator on the operating handle 5 is relatively higher than the state of vacuuming, and the position of the center of gravity of the blower is raised. The arm is still substantially vertical, and the blowing air is blown out from the air outlet 12a of the blowing tube 12, and is used to blow the dust together and make the operation easy.

Claims

A portable blower includes a main body casing (2), a motor (3) disposed in the casing, a rotating fan (4) driven by the motor, a switch (7) for controlling the rotation of the motor, and a main casing The upper suction pipe (11) and the blowing pipe (12) are characterized in that: the suction pipe is provided with a main body portion (14a) extending along a longitudinal axis (Zl), the suction pipe and the air blowing pipe The pipe extends in the same direction, and the suction pipe (11) is located above the blowing pipe (12), and the extending end of the main body of the suction pipe is provided with a bend at an angle (β) with the longitudinal axis. a bent portion (14a) having a bent portion axis line (Z2) extending from the bent position along the axis of the bent portion, the extended end of the blowing tube and the suction The bending position of the air duct is flush. In the air suction mode, the air inlet door (11a) of the air suction duct is close to the ground, and the air inlet is substantially at the same level as the air outlet (11b) of the air blowing tube.
The blower according to claim 1, characterized in that the bending portion axis (Z2) is disposed at an obtuse angle with the main body axis (Zl).
A blower according to claim 1, characterized in that the length of the suction duct bent portion (14b) is set between 5 mm and 1 m.
The air suction machine according to claim 3, wherein the air suction pipe (11) and the air blowing pipe (12) are fixedly connected, and the air suction pipe and the air blowing pipe are detachably connected with the main body casing. .
The air blower according to claim 4, wherein a safety interlock mechanism (20) is disposed between the air suction pipe (11) and the main body casing (2), and the air suction pipe is connected to the main body casing. The switch can only be triggered, and the suction tube can be removed from the main unit housing only when the switch is opened.
The air blasting machine according to claim 5, characterized in that the blowing pipe (12) is provided with an opening (8), and an air volume adjusting device (16) is arranged on the outer wall of the blowing pipe near the opening position.
A blower according to claim 6, characterized in that an air guiding device (9) is provided between the suction duct (11) and the blowing pipe (12) for guiding the escape from the opening. Airflow direction.
The air blasting machine according to claim 7, wherein the main casing is provided with a first connecting portion (5a) of the operating handle (5), and the suction pipe is provided with an operating handle (5) Second connecting portion (5b).