JP2003093295A - Telescopic pipe for vacuum cleaner and vacuum cleaner using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a telescopic pipe for a vacuum cleaner which can adjust the air flow of exhaust air returned to a suction nozzle, improve dust collecting performance by blowing exhaust air appropriately, and has improved usability, and a vacuum cleaner using the same. SOLUTION: The telescopic pipe has a first air passing pipe 38 and a second air passing pipe 39 which slidably extends and contracts in the axial direction, each of the air passing pipes is provided with a suction passage 48 and an exhaust passage 50, the suction passages 48 and the exhaust passages 50 of the air passing pipes are slidably connected in the axial direction, respectively, at least one exhaust passage 50 of the first air passing pipe 38 and the second air passing pipe 39 is provided with communicating portions (72, 73) communicating with the atmosphere, therefore, the air flow of the exhaust air can be adjusted by being leaked to the atmosphere, appropriate blowing of the exhaust air can be obtained, and dust collecting performance can be improved without blowing the dust on a surface to be cleaned before sucking it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner that uses exhaust gas to remove dust on a surface to be cleaned by returning the exhaust gas of an electric blower to a suction tool, and is also used for such an electric vacuum cleaner. Concerning the structure of the expansion pipe.

[0002]

2. Description of the Related Art Conventionally, as an expandable pipe for an electric vacuum cleaner of this type, there is one disclosed in Japanese Patent Application Laid-Open No. 11-306692. This electric vacuum cleaner will be described with reference to FIG.
As shown in the figure, exhaust gas from the electric blower 2 of the electric vacuum cleaner body 1 is passed through the exhaust communication passage 11, the exhaust introduction port 13, and the connecting pipe 5, and the hose 4 having the intake passage A35 and the exhaust passage B36, and the first The second ventilation pipe 39 is slidably held in the ventilation pipe 38, and is guided to the suction tool 7 through the exhaust passage side of the telescopic pipe 8 for the electric vacuum cleaner having the intake passage and the exhaust passage inside each ventilation pipe, It is blown to the floor surface, sucked again together with the floating dust, sent to the dust collection chamber 9 of the cleaner body 1 through the extension pipe 8 and the intake passage side of the hose 4, and returns to the electric blower 2 again via a filter (not shown). . Thus, the electric vacuum cleaner is characterized in that the air generated by the electric blower 2 is circulated.

[0003]

However, with the expandable pipe 8 for the electric vacuum cleaner having the above-mentioned structure, the amount of exhaust air recirculated to the suction tool 7 cannot be adjusted, and the surface to be cleaned is driven by the force of the exhausted air. There is a problem that the dust is blown off before it is sucked.

The present invention is intended to solve the above problems and is for an electric vacuum cleaner capable of adjusting the exhaust air volume of the exhaust gas recirculated to the suction tool, improving the dust collecting performance with an appropriate exhaust air flow, and improving the usability. An object is to provide a telescopic pipe and an electric vacuum cleaner using the same.

[0005]

In order to achieve the above object, the present invention has a first ventilation pipe and a second ventilation pipe which are slidably expanded and contracted in an axial direction. Is provided with an intake passage for intake air sucked into the electric blower and an exhaust passage for exhaust air discharged from the electric blower, and connects the intake passage and the exhaust passage of each ventilation pipe so as to be slidable in the axial direction. An expandable pipe for an electric vacuum cleaner having a communication portion communicating with the atmosphere in at least one exhaust passage of the first ventilation pipe and the second ventilation pipe. With this configuration, the exhaust air volume of the exhaust gas that has recirculated to the suction tool is discharged to the outside. It can be adjusted by leaking, an appropriate blowing air of exhaust air can be obtained, and the dust collection performance can be improved without blowing dust on the surface to be cleaned before sucking it.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is
It has a first ventilation pipe and a second ventilation pipe which are slidably and axially slidably movable, and each of the ventilation pipes has an intake passage for intake air sucked into the electric blower and is discharged from the electric blower. An exhaust passage for exhaust gas is provided, and the intake passage and the exhaust passage of each of the ventilation pipes are slidably connected in the axial direction, and at least one of the first ventilation pipe and the second ventilation pipe communicates with the atmosphere. With this telescopic pipe for electric vacuum cleaners equipped with a communication part, this configuration allows adjustment of the exhaust air flow returned to the suction tool by leaking it to the atmosphere, providing a proper exhaust air flow and cleaning the surface to be cleaned. The dust collection performance can be improved without blowing off the dust before it is sucked.

According to a second aspect of the present invention, there is provided a second ventilation pipe which extends and contracts in the first ventilation pipe slidably in the axial direction, and each of the ventilation pipes is sucked by an electric blower. An intake passage for intake air and an exhaust passage for exhaust air discharged from the electric blower are provided, and the second passage is provided inside the first ventilation pipe.
An exhaust pipe that is inserted into the exhaust passage of the ventilation pipe and slides in the axial direction to form the exhaust passage, and connects the first intake passage and the intake passage of the second ventilation pipe to the exhaust pipe. This is a telescopic pipe for electric vacuum cleaners that has a communication part that communicates with the atmosphere.With this configuration, the exhaust air volume that has recirculated to the suction tool can be adjusted by leaking it to the atmosphere, and an appropriate exhaust blowing air can be obtained. The dust collection performance can be improved without blowing off the dust on the cleaning surface before sucking it.

According to the third aspect of the present invention, the amount of exhaust gas from the communicating portion is changed according to the expansion and contraction operation, and when the relative position of the first ventilation pipe and the second ventilation pipe is contracted. In conjunction with this, by preventing exhaust from leaking to the outside, the momentum of exhaust increases and it can be used as a blower.

According to a fourth aspect of the present invention, one of the first to third aspects is one in which one end communicates with a cleaner body having a built-in electric blower and an intake side and an exhaust side of the electric blower. An electric vacuum cleaner having an expandable pipe for an electric vacuum cleaner and a suction tool connected to the other end of the elastic pipe for an electric vacuum cleaner, thereby providing an electric vacuum cleaner that is easy to use and has excellent cleaning workability. You can

[0010]

An embodiment of the present invention will be described below with reference to the drawings.

1 to 9, in the electric vacuum cleaner, a connection pipe 5 of a hose 4 is connected to a connection port 3 of a cleaner body 1.
A telescopic pipe (hereinafter referred to as an extension pipe) 8 to which a suction tool 7 is connected is connected to a grip pipe 6 on the other end side of the hose 4.

As shown in FIGS. 1 and 2, an electric blower 2 is built in the rear side of the cleaner body 1, and a dust collecting chamber 9 is provided between the connection port 3 and the electric blower 2. . A soundproof cylinder 10 covers the electric blower 2. One end of an exhaust communication passage 11 is connected to the outer peripheral surface of the soundproof cylinder. The exhaust communication passage 11 has a bellows-like portion in part, and has flexibility as a whole. The other end of the exhaust communication passage 11 is connected to the connection port 3 side, and a part of the exhaust gas discharged by the operation of the electric blower 2 is guided to the other end side connection port 3 side.

The check valve 12 held between the connection port 3 and the dust collection chamber 9 tightly communicates the connection port 3 with the inside of the dust collection chamber 9, and the exhaust communication passage 11 is connected to the front side. The substantially cylindrical exhaust introduction port 13 is integrally formed.

As shown in FIG. 3, the connecting pipe 5 has a two-layer pipe structure forming an intake passage on the inner periphery and an exhaust passage on the outer periphery, and a lid 1 covering the outer peripheral side of the connecting pipe 14.
5, a buckle 16 sandwiched between the connection pipe 14 and the lid 15
And a rotary pipe 17 whose one end side is rotatably connected to the connection pipe 14. The rotary pipe 17 has a two-layer pipe structure in which an intake passage is formed on the inner circumference and an exhaust passage is formed on the outer circumference, similarly to the connection pipe 14, and the exhaust passages of the rotary pipe 17 and the connection pipe 14 and the exhaust passages are rotated. Connect freely. The buckle 16 is biased by a spring 18 to detachably lock the connection pipe 5 to the connection □ 3. The rotary pipe 17 is rotatable about the longitudinal axis of the connecting pipe 5 and prevents the hose 4 from being beaten while the electric vacuum cleaner is in use.

The inner pipe A19 of the connecting pipe 14 and the inner pipe B20 of the rotary pipe 17 are tightly communicated by a tight packing 21, and the outer peripheral portion of the inner pipe A19 and the outer peripheral portion of the inner pipe B20 are also similarly air-tightly communicated. is doing. Fixed contacts 22 are fixed side by side in the front-rear direction on the upper surface of the connection pipe 14 on the outer peripheral side of the rotary pipe 17. The fixed contacts 22 are the rotary pipe 17 and the lid 1.
It is electrically connected to a plurality of connecting rods (not shown) held by the connector 5. The connection terminal connects the connection pipe 14 □ 3
Is connected to a main body terminal (not shown) arranged on the cleaner main body 1. Inside the fixed contact 22, the same number of rail terminals 23 are arranged facing the fixed contact 22 while being held by a substantially cylindrical rail base 24. This rail base 24 is fixed to the outer peripheral side of the rotary pipe 17,
When the rotary pipe 17 rotates about the axis in the longitudinal direction of the connecting pipe 5, the rotary pipe 17 rotates together with the rotary pipe 17, and the fixed contact 22
The electrical connection between the rail terminal 23 and the rail terminal 23 is maintained.

The hose 4 has a two-layer hose structure in which an inner hose 26 having an outer diameter smaller than the inner diameter of the outer hose 25 is accommodated, and one side of the inner hose 26 is an unconnected pipe of the inner pipe B20 of the shunting pipe 17. The outer hose 25 is wrapped around the outer circumferential surface of the rotary pipe 17 on the side opposite to the connection pipe 14 and is hermetically connected to each other.

As shown in FIG. 4, the grip tube 6 has an inner hose 26.
Of the two-layer pipe structure including an inner pipe 27A enclosing the other end of the outer hose 25 and an outer pipe 27B enclosing the other end of the outer hose 25
7, a bent pipe 28 for accommodating the front of the hose 4 on the other side of the wrapping part, and a detachable connection of the extension pipe 8 at the tip end while bending in a dogleg shape toward the front side. 28
And a component housing 29 above the bent portion of the
Switch board 30 arranged in the
An operating portion 31 for operating 0, a grip pipe cover 32 that covers the upper opening of the bent pipe 28, and a gripping pipe cover 32 and the bent pipe 28 that are swingably clamped to detachably lock the extension pipe 8. It has a buckle A33. Bend pipe 28
Is divided into two upper and lower passages by the inner wall 34, and the intake passage A
35 is airtightly connected to the inner pipe 27A of the connecting pipe 27,
The exhaust passage A36 includes an inner pipe 27A and an outer pipe 27B of the connecting pipe 27.
It communicates airtightly to the passage between them.

After the conductor A37 is connected to the rail terminal 23, it is introduced between the outer hose 25 and the wrapping portion of the outer peripheral surface of the rotary pipe 17 and between the outer hose 25 and the inner hose 26,
The other end side is led out from the outer hose 25, the outer pipe 27B of the connecting pipe 27, and the outer hose 25 wrapping portion, and is connected to the switch substrate 30 through the component accommodating portion 29.

The extension pipe 8 is slidably held in a first ventilation pipe 38 which is detachably engaged with the bent pipe 28 of the grip pipe 6, and a second ventilation pipe 39 is held therein. The tip of the front end detachably engages with the connection pipe 40 of the suction tool 7.

The second ventilation pipe 39 is divided into two upper and lower ventilation passages by an inner wall 41. The first ventilation pipe 38 is provided with a cylindrical exhaust pipe 42 inside so as to provide a gap with the inner surface, and an electric connection portion A43 is provided on one end side connected to the grip pipe 6 side.
And a hole 44 is provided near the electric connection portion 43. The exhaust pipe 42 is divided into two pipes, an upper exhaust pipe 45 and an upper exhaust pipe 45, and a lower exhaust pipe 46 is a lower surface of the first ventilation pipe 38. They are held inside the first ventilation pipe 38 in a state of being connected to each other.

Therefore, the other end side of the exhaust pipe 42 is a free end, and this free end side is inserted into the ventilation path above the second ventilation pipe 39. The second ventilation pipe 39 enters the inside of the first ventilation pipe 38, is air-tightly communicated with the tight packing 47, and is held in the sliding state to form an intake passage B48.
Further, the exhaust pipe 42 enters the upper layer passage of the second ventilation pipe 39, is airtightly communicated with the tight packing 49, and is slidably held to form an exhaust passage B50.

Reference numeral 51 is a conductor B, and the conductor B51 is housed inside the exhaust passage B50 and the exhaust pipe 42 of the second ventilation pipe 39, and one end of the exhaust pipe 42 separated into two upper and lower pipes on the way. It is led out from the upper exhaust pipe 45, is connected to the electric connection portion A43 on the first ventilation pipe 38 side, and the other end is electrically connected to the display base 52 provided on the suction tool 7 side of the second ventilation pipe 39. It is connected to the part B53.

When the extension tube 8 is connected to the grip tube 6 and the suction tool 7, a connection terminal (not shown) provided on the grip tube 6 and the suction tool 7
Is electrically connected to.

Reference numeral 54 denotes a push button, which has a locking projection 55 that moves up and down in association with the vertical movement of the push button 54. The locking projection 55 is located on the lower surface of the second ventilation pipe 39 and is axially arranged. It is configured to elastically engage with a plurality of locking recesses 56 formed at predetermined intervals. The locking projection 55 and the locking recess 56
With this, the margin of the second ventilation pipe 3 shouting to the first ventilation pipe 38 can be adjusted to a length convenient for the electric vacuum cleaner user. The shape of the connecting portion between the extension tube 8 and the grip tube 6 and the shape of the connecting portion between the suction tool 7 and the extension tube 8 are formed in the same shape, and the suction tool 7 is directly connected to the grip tube 6 for use. can do.

In FIG. 9, the structure of the suction tool 7 is as follows. In front of the suction tool 7, a rotating brush 58 having a built-in electric motor 57 is rotatably held. The rotating brush 58 is rotationally driven by the built-in electric motor 57, the rotation is transmitted through a speed reducer (not shown), and scrapes up a plurality of blades A60 or the like attached to the peripheral surface that rotates about 1500 rpm. Reference numeral 62 denotes a dust suction port formed on the rear side of the rotating brush 58, which communicates with a connecting cylinder 63 which is vertically rotatable. Reference numeral 64 denotes a suction pipe connected to the connecting cylinder 63 so as to be rotatable in the left-right direction at a constant angle, and is divided into two upper and lower passages by a pipe wall 65. The lower intake passage C66 is connected to the front of the connecting cylinder 63 at the front and the intake passage B48 at the rear of the extension pipe 8
Is in communication with. The upper exhaust passage C67 communicates with the exhaust passage B50 of the extension pipe 8 at the rear, while the flexible pipe 68 and a bypass (exhaust passage) 69 formed from the upper part to the front part of the suction tool are provided at the front. An exhaust port 70 is formed at the end. Then, the exhaust gas discharged by the operation of the electric blower 2 is discharged from the exhaust port 70 of the bypass 69 toward the suction opening 59.

Next, the operation and action of the above configuration will be described. The electric blower 2 is operated by operating the operating portion 71 of the grip tube 6.
Drive the electric motor 50 through the conductor B46 at the same time.
Is supplied with electric power, and the electric motor 51 rotationally drives the rotating brush 58. The rotating brush 58 scrapes up dust on the surface to be cleaned by the blade A 60 and dust on the surface to be cleaned by the brush B 61.

The dust is an intake air flow generated by the suction of the electric blower 2, and is an intake passage 59, a dust intake 62, a connecting cylinder 63, an intake passage C66 of the suction pipe 64, and an intake passage B48 of the second ventilation pipe 39. , The first ventilation pipe 38 and the intake passage A35 of the bent pipe 28, the inner hose 26, the rotary pipe l
7 through the inner pipe B20 and the connecting pipe 14 through the inner pipe A19 to be transferred into the dust collecting chamber 9 and accumulated therein. The clean intake air flow from which dust has been separated passes through the electric blower 2 and is then discharged into the soundproof cylinder 10.

At least a part of the exhaust gas is exhaust pipe 1
1, connection pipe 1 through exhaust inlet 13 and through hole 65
After being introduced between the inner pipe A19 of No. 4 and the outer station of the connecting pipe 14, between the inner pipe B20 of the rotary pipe 17 and the outer periphery, between the outer hose 25 and the inner hose 26, and the inner pipe 27A of the connecting pipe 27. Between the outer pipe 27B, the exhaust passage A36 of the bent pipe 28, the exhaust passage B50 of the first ventilation pipe 38, the exhaust passage C67 of the suction tool 7, the flexible pipe 68, and the bypass 69, and the exhaust port 7
It is discharged from 0 toward the suction opening 59. This exhausted gas relieves the degree of close contact between the suction tool 7 and the surface to be cleaned, and reduces the moving operation force of the suction tool 7. At the same time, dust on the surface to be cleaned is blown and transferred in the direction of the dust suction port 62, and the rotating brush 58
Improves dust collection performance by synergistic effect with rotation of.

As shown in FIGS. 6 to 8, the extension pipe 8 has a hole a72 on the side of the exhaust pipe 42 and a hole b73 on the side of the second ventilation pipe 39, which is a communication part for communicating with the atmosphere. When the relative position of the ventilation pipe 38 and the second ventilation pipe 39 is extended, a part of the exhaust gas can pass through the hole portions a72 and b73 and be leaked to the atmosphere, and the exhaust gas that has recirculated to the suction device 7 can be discharged. The amount of exhaust air can be adjusted, an appropriate blowing air of exhaust air can be obtained, and the dust collection performance can be improved without blowing dust on the surface to be cleaned before sucking it. Further, when the relative positions of the first ventilation pipe 38 and the second ventilation pipe 39 are contracted, the exhaust pipe 42 projects from the end portion of the second ventilation pipe 39, and further the second ventilation pipe 39 causes the hole a72. Closed, and the first vent pipe 3
The hole b73 is closed by 8 so that the exhaust gas is closed so as not to leak to the atmosphere, so that the exhaust gas with increased momentum is exhausted from the exhaust pipe 4
It can be used as a blower blower from 2 and the usability of cleaning work can be improved.

[0030]

According to the present invention, it is possible to adjust the exhaust air volume of the exhaust gas that has recirculated to the suction tool, improve the dust collection performance by the appropriate exhaust air flow, and improve the usability of the vacuum cleaner expansion pipe. An object is to provide an electric vacuum cleaner using the same.

[Brief description of drawings]

FIG. 1 is an overall sectional view of an electric vacuum cleaner showing an embodiment of the present invention.

FIG. 2 is a sectional view of a cleaner body of the electric vacuum cleaner.

FIG. 3 is a sectional view of a front portion of a cleaner body of the electric vacuum cleaner.

FIG. 4 is a sectional view of a grip tube of the electric vacuum cleaner.

FIG. 5 is a sectional view of an extension tube of the electric vacuum cleaner.

FIG. 6 is a sectional view of a main part of an extension pipe of the electric vacuum cleaner.

FIG. 7 is a sectional view of an extension tube of the vacuum cleaner.

FIG. 8 is a sectional view of an essential part of an extension tube of the electric vacuum cleaner.

FIG. 9 is a sectional view of a suction tool of the vacuum cleaner.

FIG. 10 is an overall cross-sectional view of a conventional vacuum cleaner

[Explanation of symbols]

2 electric blower 38 First ventilation pipe 39 Second ventilation pipe 42 Exhaust pipe 48 Intake passage B 50 Exhaust passage B 72 hole A 73 hole B

Claims (4)

[Claims] 1. A first ventilation pipe and a second ventilation pipe that are slidably and axially slidably movable, wherein each of the ventilation pipes has an intake passage for intake air sucked into an electric blower, and An exhaust passage for the exhaust air discharged from the electric blower is provided, and the intake passage and the exhaust passage of each of the ventilation pipes are slidably connected in the axial direction,
A telescopic pipe for an electric vacuum cleaner, wherein a communication portion communicating with the atmosphere is provided in at least one exhaust passage of the first ventilation pipe and the second ventilation pipe. 2. A second ventilation pipe that expands and contracts in the first ventilation pipe so as to be slidable in the axial direction, wherein each of the ventilation pipes has an intake passage for intake air sucked into an electric blower, and An exhaust passage for exhaust gas discharged from the electric blower is provided, and an exhaust pipe that is inserted into the exhaust passage of the second ventilation pipe and slides in the axial direction to form an exhaust passage is provided inside the first ventilation pipe. An expandable pipe for an electric vacuum cleaner, comprising: a communication part that communicates the first intake passage and the intake passage of the second ventilation pipe, and the exhaust pipe has a communication portion that communicates with the atmosphere. 3. The telescopic pipe for an electric vacuum cleaner according to claim 1, wherein the amount of exhaust gas from the communicating portion is changed according to the telescopic operation. 4. A vacuum cleaner main body having a built-in electric blower, and an extension pipe for a vacuum cleaner according to claim 1, wherein one end communicates with an intake side and an exhaust side of the electric blower, An electric vacuum cleaner having a suction tool connected to the other end of the expandable pipe for the electric vacuum cleaner.