JP3160239B2 - Electric vacuum cleaner - Google Patents

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 in which exhaust air is returned to a suction port without being exhausted to the outside of the cleaner body and circulated.

[0002]

2. Description of the Related Art A vacuum cleaner of this type is disclosed, for example, in FIG. 8 (see Japanese Utility Model Publication No. 39-36553).

In FIG. 8, reference numeral 1 denotes a cleaner main body, 2 denotes a filter arranged in the cleaner main body 1, and 3 denotes a filter 2
An electric blower 4 is disposed in the cleaner main body 1 and has a suction side communicating with the dust collecting chamber 3. A dust collecting chamber 4 is provided in the cleaner main body 1 and communicates with the dust collecting chamber 3. The suction-side connection port 6 is an exhaust-side connection port provided on the cleaner main body 1 and communicating with the exhaust side of the vacuum cleaner 1. This vacuum cleaner body 1
Is connected to a suction port body 7 through a connection pipe 8 such as a hose or a pipe.

[0004] The suction port 7 has an exhaust air path 9 for blowing exhaust air downward from the front side of the suction port 7a, and a suction air path 10 for sucking dust sucked from the suction port 7a.
Having. The connection pipe 8 is formed of an inner pipe 8a and an outer pipe 8b, and is formed as an inner and outer double pipe. An exhaust air passage 12 between the outer pipe 8 b and the exhaust air connection port 6 communicates with the exhaust air passage 9.

[0005] In such a vacuum cleaner, dust sucked together with air from the suction port 7a is sucked into the dust collecting chamber 3 through the suction air passages 10 and 11, and collected by the filter 2. I have. On the other hand, at this time, the air cleaned by the filter 2 is guided to the exhaust air passage 9 via the electric blower 4 and the exhaust air passage 12, and is blown out from the exhaust air passage 9 downward of the suction port 7a. Suction port 7 for dust on cleaning surface 13
The dust is blown to the side a, and the blown dust is sucked into the suction air passage 10 and circulated again.

[0006]

By the way, in the above-mentioned vacuum cleaner, since the connecting pipe 8 and the suction port 9 have a structure in which the end faces of the connecting ends are abutted with each other, the flanges 7a, 8a of the connecting ends are connected to each other. The structure is such that it is firmly fixed over the entire circumference via a fixing member 14 having a C-shaped cross section so as to achieve a hermetic seal at the abutting portion between the end faces of the connection ends of the connection pipe 8 and the suction port body 9. Was.

However, in this structure, it is very difficult to easily ensure airtightness because the thickness of the end face of the connection end between the connection pipe 8 and the suction port body 9 is small, and it is difficult to suction other suction tools. If the user wants to use the mouthpiece 7 instead of the mouthpiece 7 or replace it due to a failure, the replacement cannot be performed.

Accordingly, a first object of the present invention is to attach / detach the suction port to / from the main body of the cleaner or to a connecting pipe so that other accessories can be used or the suction port can be easily replaced when the suction port fails. It is an object of the present invention to provide a replaceable vacuum cleaner.

A second object of the present invention is to provide an electric vacuum cleaner in which the suction port can be easily attached to and detached from the main body of the cleaner or the connecting pipe.

A third object of the present invention is to provide a vacuum cleaner capable of sufficiently securing airtightness at the time of connection.

[0011]

In order to achieve the first and second objects, a first aspect of the present invention is directed to an electric blower built in a cleaner main body, wherein a suction side and a suction opening body form a suction air passage. The exhaust side of the electric blower and the suction port are connected by an exhaust air path, and the suction port is connected to the cleaner body.
An air path connection part that can be attached and detached is installed in the middle of both air paths.
In the vacuum cleaner, the air passage connection portion is outside.
Inner / outer duplex first and second contacts with inner pipe disposed inside the pipe
The inner pipe has the exhaust air passage and the suction air
Road and the inner pipe and the outer pipe
Is the other of the exhaust air passage and the suction air passage.
And the outer pipes of the first and second connection pipes and the inner pipes.
Pipes are provided so that they can be inserted and connected to each other.
And at least one of the first and second connection pipes is an inner pipe.
Is characterized in that the end portion of the vacuum cleaner is protruded from the end of the outer pipe .

[0012]

[0013]

According to a second aspect of the present invention, there is provided the above-described first and second aspects.
Electric blower built into the vacuum cleaner body to achieve the purpose
The suction side of the machine and the suction port body are connected via a suction air path,
The exhaust side of the electric blower and the suction port are connected by an exhaust air path.
The suction port can be attached to and detached from the cleaner body.
An air path connecting portion is provided in the middle of both air paths.
In the vacuum cleaner, the air passage connection portion is provided inside the outer pipe.
The inner and outer duplex first and second connecting pipes with pipes
The inside pipe is either the exhaust air passage or the suction air passage.
And the space between the inner pipe and the outer pipe
Is the other of the exhaust air path and the suction air path,
Outer pipes and inner pipes of the first and second connection pipes
Are respectively provided so as to be insertable and connectable to each other , and the insertion fitting part between the outer pipes of the first and second connection pipes and the insertion fitting part between the inner pipes of the first and second connection pipes are axial lines. The vacuum cleaner is shifted in the direction.

According to a third aspect of the present invention, there is provided the above-described first to third aspects.
Electric blower built into the vacuum cleaner body to achieve the purpose
The suction side of the machine and the suction port body are connected via a suction air path,
The exhaust side of the electric blower and the suction port are connected by an exhaust air path.
The suction port can be attached to and detached from the cleaner body.
An air path connecting portion is provided in the middle of both air paths.
In the vacuum cleaner, the air passage connection portion is provided inside the outer pipe.
The inner and outer duplex first and second connecting pipes with pipes
The inside pipe is either the exhaust air passage or the suction air passage.
And the space between the inner pipe and the outer pipe
Is the other of the exhaust air path and the suction air path,
Outer pipes and inner pipes of the first and second connection pipes
Are provided so as to be insertable and connectable to each other, and one of the insertion fitting portion between the outer pipes and the insertion fitting portion between the inner pipes is taperedly fitted, and the insertion fitting portion between the outer pipes is formed. And the other of the insertion fitting portions of the inner pipes is fitted with play, and a seal member is interposed in the fitting portion with play. It is characterized by having.

According to a fourth aspect of the present invention, there is provided a vacuum cleaner according to the third aspect.
The inside of the inner pipe is the suction air passage, the space between the inner pipe and the outer pipe is the exhaust air passage, and the insertion fitting portion between the inner pipes is tapered. It is characterized by having.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In FIG. 6, reference numeral 20 denotes a vacuum cleaner main body of the vacuum cleaner, 21 denotes a dust collecting hose (flexible connection pipe) connected to the vacuum cleaner main body 20, and 22 denotes a fixed end of the dust collecting hose 21. The connecting pipes at hand (hand pipes), 23 and 23 ′ are connecting pipes for extension (extending pipes or extension pipes) connected in series to the connecting pipe 22 at hand, and 24 is connecting pipes 23 and 2 for extension.
It is a suction port connected to the hand connection pipe 22 via 3 '.

As shown in FIG. 7, a dust collecting chamber 25 is formed in the front part of the cleaner body 20, and a fan chamber 26 is formed in the rear part of the dust collecting chamber 25. A paper pack filter 27 is provided in the dust collection chamber 26 as a dust collection filter, and an electric blower 28 having a suction side 28 a communicating with the dust collection chamber 25 is provided in the fan chamber 26. A rear portion of the fan chamber 26 is an exhaust chamber 26 b which is open from an exhaust port (exhaust side) 28 b of the electric blower 28 and is separated from the dust collection chamber 25. Moreover, the dust collecting hose 2 is provided in the cleaner body 20.
An exhaust air passage 29 is formed extending to a portion of the connection portion 21a to the first cleaner body 20.

The dust collection hose 21 is formed concentrically inside and outside from a bellows-shaped inner flexible hose 30 and a bellows-shaped outer flexible hose 31, and a suction air passage is formed in the inner flexible hose 30. An exhaust air passage 33 is formed between the flexible hoses 30 and 31.

The suction port body 24 includes a suction port main body 34.
And a suction port body side connection pipe (connection pipe) 35 attached to the suction port main body 34. A suction chamber 36 that opens downward is formed in the suction port body 34, and an exhaust air passage 37 that communicates with a suction port 36 a at the lower end of the suction chamber 36 on the front side is formed. The suction port body side connection pipe 35 is formed concentrically with the inner pipe 35a and the outer pipe 35b from inside to outside, and a suction air passage 38 communicating with the suction chamber 36 is formed in the inner pipe 35a. , An exhaust air passage 39 communicating with the exhaust air passage 37 is formed.

In FIG. 6, a detachable air path connecting part 40 between the above-mentioned hand connecting pipe 22 and the extending connecting pipe 23, a detachable air path connecting part 41 between the extending connecting pipes 23 and 23 ', an extension. Since the detachable air path connecting portion 42 and the like of the connecting pipe 23 'for the pipe and the suction port side connecting pipe 35 have the same structure, FIG.
5, only the connecting part 40 will be described, and the air path connecting parts 41 and 42 will be denoted by the same reference numerals and the description thereof will be omitted. In the air path connecting portion 40 between the hand connection pipe 22 and the extension connection pipe 23, the hand connection pipe 22 becomes a first connection pipe, and the extension connection pipe 23 becomes a second connection pipe. In the air path connecting portion 41 between the extension connection pipes 23 and 23 ', the extension connection pipe 23 serves as a first connection pipe, and the extension connection pipe 23' serves as a second connection pipe. Further, in the air path connecting portion 42 between the extension connecting pipe 23 'and the suction port body side connection pipe 35, the extension connection pipe 23' becomes the first connection pipe, and the suction port body side connection pipe 35 becomes the second connection pipe. .

As shown in FIG. 1, in the air path connecting portion 40, the hand connecting pipe (first connecting pipe) 22 has a double inner / outer structure in which an inner pipe 44 is concentrically arranged inside an outer pipe 43. The pipes 43 and 44 are integrally joined by a plurality of ribs 45 as shown in FIG. And the inner pipe 44
A suction air passage 46 is formed therein, and an exhaust air passage 47 is formed between the pipes 43 and 44. Moreover, the inner pipe 4
4 has a distal end portion 44a projecting from the distal end of the outer pipe 43 as shown in FIGS. In addition, a tapered hole 48 whose diameter gradually increases toward the distal end is formed in the inner surface of the distal end portion 44a as shown in FIGS.

In the air path connecting section 40, the connecting pipe for extension (second connecting pipe) 23 is provided inside the outer pipe 49 in the inner pipe 5.
The pipes 49 and 50 are integrally joined by a plurality of ribs 51 as shown in FIG. A suction air passage 52 is formed in the inner pipe 50, and an exhaust air passage 53 is formed between the pipes 50 and 51.

Further, a small diameter portion is provided at the tip of the outer pipe 49.
49a is formed, and a step 54 is formed at the base of the small diameter portion 49a.
Are formed. The small-diameter portion 49a is formed with an annular holding groove 55 that is open on the outer surface and extends annularly in the circumferential direction. An annular seal member 56 is fitted and held in the annular holding groove 55. As shown in FIG. 4, the annular seal member 56 has a lip portion 56 projecting from the annular holding groove 55.
a is provided. Also, the inner pipe 50 has a tip 50
As shown in FIG. 1, a is located slightly inside the tip of the outer pipe 49. Moreover, this tip 50a
As shown in FIGS. 1 and 5, the outer surface is formed with a tapered outer surface 57 whose diameter gradually decreases toward the distal end.

The connecting pipe (first connecting pipe) 22 and the connecting pipe for extension (second connecting pipe) 23 are inserted and connected to each other.

That is, the tip 50a of the inner pipe 50 is inserted and connected into the tip 44a of the inner pipe 44,
With tapered outer surface 57 of 0a is fitted taper to the tapered hole 48 of the tip portion 44a, a small diameter portion 4 of the outer pipe 49
9a is inserted and connected into the distal end of the outer pipe 43.
The outer diameter of the small diameter portion 49a of the outer pipe 49 is
Is formed slightly smaller than the inner diameter of
A slight play (gap) 58 is formed between a and the outer pipe 43. Then, the lip portion 56a of the annular seal member 56 elastically contacts the inner surface of the outer pipe 43, and the small-diameter portion 49
a and the outer pipe 43 are hermetically sealed. Therefore, even if the inner and outer diameters of these pipes 43, 44, 49, and 50 have some dimensional variations, the inner pipes 44,
50 and the outer pipes 43 and 49 can be easily connected to each other, and the airtightness at the time of connection can be sufficiently ensured. As a result, the manufacture of the connection pipe becomes easy.

In this state, the outer surfaces of the outer pipes 43 and 49 are flush with each other, so that the appearance is improved.

Further, the insertion fitting portion 59 between the outer pipes 43 and 49 and the insertion fitting portion 60 between the inner pipes 44 and 50 are slightly shifted in the axial direction and overlap as shown in FIG. With such a configuration, the insertion fitting portions (connection portions) 59, 6 between the outer pipes 43, 49 and between the inner pipes 44, 50 are formed.
Even if the ends of the inner pipes 44 do not overlap and a bending stress acts on the insertion fitting portions 59 and 60, one of the inner pipes 44 (or 50) at the insertion fitting portion 60 between the inner pipes 44 and 50. The shearing force acting on the other inner pipe 50 (or 40) from the end is inserted into the outer pipes 43 and 49 by the insertion fitting portion (connection portion) 59.
At the insertion fitting portion (connecting portion) 59 between the outer pipes 43 and 49.
The shearing force acting on the other outer pipe 49 (or 43) from the end of 9) can be reinforced by the insertion fitting portion (connection portion) 60 between the inner pipes 44, 50.

As a result, for example, as described above, in order to improve the appearance of the connecting portion between the outer pipes 43 and 49 without any step, a small-diameter portion 49a is provided at the end of one of the outer pipes 49 and the step 54 is formed. When it is provided, even if a shearing stress due to bending acts on the step portion 54, it can be reinforced at the connection portion between the inner pipes, so that the outer pipe can be prevented from being cut at the step portion.

Next, a connection operation and an operation in the air path connection portion 40 will be described.

The connection between the hand connection pipe 22 and the extension connection pipe 23 is performed through the inner pipes 44 and 50, and then through the outer pipes 43 and 49. That is, when connecting the proximal connection pipe 22 and the extension connection pipe 23, the extension pipe is inserted by inserting the inner pipe 44 of the proximal connection pipe 22 between the outer pipe 49 and the inner pipe 50 of the extension pipe connection pipe 23. Connection pipe 2
The third inner pipe 50 is inserted into the inner pipe 44 of the hand connection pipe 22. At the time of this insertion, the inner pipes 44 and 50 are in a state where they can be seen from each other.
0 can be easily inserted and connected.

When this insertion connection is made to some extent, the small diameter portion 49a at the tip of the outer pipe 49 is inserted into the tip of the outer pipe 43, and finally the inner pipe 50 is inserted into the tapered hole 48 of the inner pipe 44. When the tapered outer surface 57 substantially adheres, there is substantially no gap between the end surface 54a of the step portion 54 and the tip of the outer pipe 43. This outer pipe 43, 4
9 are performed after the connection between the inner pipes 44 and 50 is started, and the outer pipe 43 and the small diameter portion 49a are connected.
Are formed to have a size that allows some play between them, so that the small diameter portion 49a can be easily inserted and connected to the outer pipe 43. In this insertion connection state, the small diameter portion 49
a annular sealing member 56 is in elastic contact with the inner surface of the outer pipe 43, the outer pipe 43, together so that the hermetic seal between the small diameter portion 49a is performed, become the outer surface of the outer pipe 43, 49 is substantially flush And it looks good.

The separation of the hand connection pipe (first connection pipe) 22 and the extension connection pipe (second connection pipe) 23 is performed by pulling the connection pipes 22 and 23 apart from each other in the opposite direction. Easy to do.

The connection and disconnection at the air path connecting section 40 are performed in the same manner at the air path connecting sections 41 and 42, so that the suction port 24 is connected to the cleaner main body 20 or the connecting pipe 2.
It can be easily attached to and detached from 3 'or the like jointly or directly.
Further, the suction port body 24 is connected to the cleaner main body 1 or the connection pipe 23 '.
It can be attached or detached indirectly or directly with respect to other components, and other accessories can be used, or it can be easily replaced when the suction port 24 breaks down.

The above-described connecting pipe 2 is connected to the air path connecting portions 41 and 42.
In the state where the same connection as the air passage connection portions 40 of the connection pipes 2 and 23 is performed, the suction air paths 46 and 52 of the connection pipes 22 and 23, the suction air path (not shown) in the connection pipe 23 ', and the inside of the dust collection hose 21 The suction air passage 32 of the cleaner body 20 and the suction air passage 38 of the suction port body 24 as shown in FIG.
A series of suction air passages 62 connecting the four suction chambers 36 are formed. Similarly, exhaust air paths 47 and 53 of the connection pipes 22 and 23, an exhaust air path (not shown) in the connection pipe 23 ', an exhaust air path 33 in the dust collection hose 21, and an exhaust air path in the cleaner body 20. The exhaust air passages 29 and the exhaust air passages 37 of the suction port body 24 and the like constitute a series of exhaust air paths 63 that communicate the exhaust chamber 26 b of the cleaning body 20 and the suction chamber 36 of the suction port body 24.

In such a connection state, the electric blower 2
When the air blower 8 is operated, the electric blower 28 sucks the air in the dust collection chamber 25 to apply a suction negative pressure to the dust collection chamber 25, and applies the suction negative pressure to the suction port 24 through the suction air passage 62. On the suction chamber 36. As a result, the dust sucked into the suction port body 24 together with the air is sucked into the paper pack filter 27 of the dust collection chamber 25 via the suction air passage 62 and collected and cleaned. The air is sucked into the blower 28 and discharged from the exhaust port 28b into the exhaust chamber 26b. The air discharged into the exhaust chamber 26 b is guided to the suction port 24 via the exhaust air path 63, and flows from the haiku air path 37 in the suction port 24, which is a part of the exhaust air path 63, to the suction chamber 36. The air is blown backward from the front side to the suction port 36a, and the suction chamber 36
Together with the dust sucked into the dust collecting chamber 2 through the suction air passage 62.
5 and circulate.

When such air is circulated, the air passage connecting portion 4
At 0, the suction negative pressure acts in the suction air passages 46, 52, so that the suction negative pressure acts in a direction to deepen the insertion connection of the inner pipes 44, 50, and the taper of the inner pipe 44 The hole 48 and the tapered outer surface 57 of the inner pipe 50 are brought into close contact. As a result, the airtightness of the insertion fitting portion 60 of the inner pipes 44 and 50 can be sufficiently secured without a seal.

[0039]

As described above, according to the first aspect of the present invention, the suction side of the electric blower built in the main body of the cleaner is connected to the suction port through the suction air passage, and the exhaust side of the electric blower is provided. And the suction port body are connected by an exhaust air path, and the suction port
An air path connecting portion for detaching a body from the cleaner body
Is a vacuum cleaner provided in the middle of both air passages.
In the air path connection part, the inner pipe is disposed inside the outer pipe.
It consists of inner and outer duplex first and second connecting pipes,
Is one of the exhaust air path and the suction air path, and
The space between the inner pipe and the outer pipe is
And the other of the first and second connection
The outer pipes and inner pipes of the pipes are different from each other.
The first and second connection pipes are provided so that
At least one end of the inner pipe must be
Because of the protruding configuration, the insertion portions (connection portions) of the outer pipes and the inner pipes of the first and second connection pipes respectively overlap, and the suction opening body is connected to the cleaner body or the connection pipe. And the like, and the sealability of the connection portion of the first and second connection pipes is improved. Moreover, when connecting the first and second connection pipes, the first and second connection pipes are connected in a state where the tip of one of the inner pipes of the first and second connection pipes is visible .
After first being inserted into the other of the connecting pipes, the outer pipes of the first and second connecting pipes can be inserted in a visible state, so that the connection between the first and second connecting pipes can be performed more easily. it can.

[0040]

[0041]

According to a second aspect of the present invention, there is provided the above-described first and second aspects.
Electric blower built into the vacuum cleaner body to achieve the purpose
The suction side of the machine and the suction port body are connected via a suction air path,
The exhaust side of the electric blower and the suction port are connected by an exhaust air path.
The suction port can be attached to and detached from the cleaner body.
An air path connecting portion is provided in the middle of both air paths.
In the vacuum cleaner, the air passage connection portion is provided inside the outer pipe.
The inner and outer duplex first and second connecting pipes with pipes
The inside pipe is either the exhaust air passage or the suction air passage.
And the space between the inner pipe and the outer pipe
Is the other of the exhaust air path and the suction air path,
Outer pipes and inner pipes of the first and second connection pipes
Are respectively provided so as to be insertable and connectable to each other , and the insertion fitting part between the outer pipes of the first and second connection pipes and the insertion fitting part between the inner pipes of the first and second connection pipes are axial lines. Since the ends of the connecting portions of the inner and outer pipes of the first and second connecting pipes do not overlap with each other, bending stress is applied to the connecting portions of the first and second connecting pipes. Even if it acts, the shearing force acting on the connection between the inner pipes of the first and second connection pipes from the end of one of the inner pipes to the other of the inner pipes can be reinforced by the connection between the outer pipes. At the connection between the outer pipes of the second connection pipe, the shear force acting on the other outer pipe from the end of one of the outer pipes can be reinforced by the connection between the inner pipes. As a result, for example, in order to improve the appearance of the connection portion between the outer pipes without a step, when the end of one of the outer pipes is formed to have a small diameter to have a step, the shear stress due to bending at the step portion is reduced. Even if it works, it can be reinforced at the connection between the inner pipes, so that the outer pipe can be prevented from being cut at the step.

According to the third aspect of the present invention, the first to third aspects described above.
Electric blower built into the vacuum cleaner body to achieve the purpose
The suction side of the machine and the suction port body are connected via a suction air path,
The exhaust side of the electric blower and the suction port are connected by an exhaust air path.
The suction port can be attached to and detached from the cleaner body.
An air path connecting portion is provided in the middle of both air paths.
In the vacuum cleaner, the air passage connection portion is provided inside the outer pipe.
The inner and outer duplex first and second connecting pipes with pipes
The inside pipe is either the exhaust air passage or the suction air passage.
And the space between the inner pipe and the outer pipe
Is the other of the exhaust air path and the suction air path,
Outer pipes and inner pipes of the first and second connection pipes
Are provided so as to be insertable and connectable to each other, and one of the insertion fitting portion between the outer pipes and the insertion fitting portion between the inner pipes is taperedly fitted, and the insertion fitting portion between the outer pipes is formed. And the other of the insertion fitting portions of the inner pipes is configured to be fitted with play, and a seal member is interposed in the fitting portion having play. Therefore, even if there is some dimensional variation in the inner and outer diameters of these pipes, the inner pipes and the outer pipes can be easily connected to each other, and the airtightness at the time of connection can be sufficiently ensured. Becomes

According to a fourth aspect of the present invention, there is provided a vacuum cleaner according to the third aspect.
The inside of the inner pipe is the suction air passage, the space between the inner pipe and the outer pipe is the exhaust air passage, and the insertion fitting portion between the inner pipes is tapered. With this structure, the suction pressure acting on the inner pipe causes a force in the direction to deepen the connection between the inner pipes to act on this insertion fitting, and the airtightness of the insertion fitting is not sealed. Is sufficient.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of the vacuum cleaner in FIG. 6 according to the present invention, that is, a cross-section of an air path connection section along line AA in FIG.

FIG. 2 is an explanatory perspective view in which main parts of a hand connection pipe and an extension connection pipe of FIG. 1 are separately shown.

FIG. 3 is a sectional view taken along lines BB and CC in FIG. 1;

FIG. 4 is an enlarged view of an insertion fitting portion between the outer pipes of FIG. 1;

FIG. 5 is an enlarged view of an insertion fitting portion between the inner pipes of FIG. 1;

FIG. 6 is an external perspective view of a vacuum cleaner having the structure of FIGS.

FIG. 7 is an explanatory view of an air path of the electric vacuum cleaner in FIG. 6;

FIG. 8 is an explanatory view of a conventional vacuum cleaner.

[Explanation of symbols]

28 ... electric blower 20 ... cleaner body 24 ... suction port body 25 ... dust collection chamber 28a ... suction side 28b ... exhaust port (exhaust side) 40, 41, 42 ... -Air passage connection part 43 ... Outer pipe 44 ... Inner pipe 44a ... Tip part 48 ... Tapered hole 49 ... Outer pipe 50 ... Inner pipe 22 ... Hand connecting pipe (No. 1 connection pipe) 23 ... extension connection pipe (second connection pipe) 46 ... suction air path 47 ... exhaust air path 52 ... suction air path 53 ... exhaust air path 57 ... Tapered outer surfaces 59, 60: insertion fitting part (connection part) 62: suction air path 63: exhaust air path

Claims (4)

(57) [Claims] 1. A suction side of an electric blower built in a cleaner body and a suction port body are connected via a suction air path, and an exhaust side of the electric blower and the suction port body are connected via an exhaust air path . Previous
Wind that makes the suction port body detachable from the vacuum cleaner body
Electric cleaning in which a road connection part is provided in the middle of both air paths
In the machine, the air path connecting portion is provided with an inner pipe inside an outer pipe.
It consists of double first and second connection pipes, and the inside of said inner pipe is
The exhaust air path and the suction air path are either
The space between the pipe and the outer pipe is
And the other of the first and second connection pipes.
Outer pipes and inner pipes are inserted into each other
Is provided so that only the first and second connection pipes can be connected.
On one side, the tip of the inner pipe protrudes from the tip of the outer pipe
An electric vacuum cleaner characterized by doing . 2. The suction of an electric blower built in a cleaner body.
Side and the suction port body are connected via a suction air passage,
The exhaust side of the blower and the suction port are connected by an exhaust air path,
Wind that makes the suction port body detachable from the vacuum cleaner body
Electric cleaning in which a road connection part is provided in the middle of both air paths
In the machine, the air path connecting portion is provided with an inner pipe inside an outer pipe.
It consists of double first and second connection pipes, and the inside of said inner pipe is
The exhaust air path and the suction air path are either
The space between the pipe and the outer pipe is
And the other of the first and second connection pipes.
Outer pipes and inner pipes are inserted into each other
Outside pipe of the first and second connection pipes,
And the inner pipe of the first and second connection pipes
It is characterized by being displaced in the axial direction from the insertion fitting part
And vacuum cleaner. 3. The suction of an electric blower built in a cleaner body.
Side and the suction port body are connected via a suction air passage,
The exhaust side of the blower and the suction port are connected by an exhaust air path,
Wind that makes the suction port body detachable from the vacuum cleaner body
Road connection part is in the middle of both airways Electric cleaning provided in
On the machine, The air path connection part is the inside and outside where the inner pipe is arranged inside the outer pipe
It consists of double first and second connection pipes, and the inside of said inner pipe is
The exhaust air path and the suction air path are either
The space between the pipe and the outer pipe is
And the other of the first and second connection pipes.
Outer pipes and inner pipes are inserted into each other
Is provided so that only the outer pipes can be connected to each other.
And one of the insertion fittings of the inner pipes is tapered
And the inner pipe has the same insertion fitting portion as the outer pipe.
The other part of the mating part is a fitting with play.
And a seal member is provided at the fitting portion having the play.
An electric vacuum cleaner characterized by being interposed. 4. The inside of the inner pipe is defined as the suction air passage.
The space between the inner pipe and the outer pipe is
And the insertion fitting portion between the inner pipes
4. The electrical connection according to claim 3, wherein the connection is tapered.
Vacuum cleaner.