JP2000070192A - Suction port body of vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction port body of a vacuum cleaner wherein noises produced by the turbulence of air flow can be reduced and the fluctuation of the suction port can be prevented to improve operability. SOLUTION: There are provided a suction port body wherein an upper case 201 is attached to a lower case 102, a first connection pipe which is vertically turnable with respect to the suction port body, and a second connection pipe which is turnable in left and right directions with respect to the first connection pipe. A tongue part 508 is formed on the inner surface of the first connection pipe so as to extend from the first connection pipe onto the second connection pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mouthpiece of a vacuum cleaner, and more particularly to a mouthpiece of a vacuum cleaner which reduces noise and improves operability of the mouthpiece.

[0002]

2. Description of the Related Art One end of a mouthpiece used in a conventional vacuum cleaner is connected to the rear side of the mouthpiece so as to be rotatable in a vertical direction, and the other end is bent upward in a substantially L-shape. A connection pipe having a casing connected to the casing and a suction joint connected to the casing and rotatably in the circumferential direction (left-right direction) is disposed, and the suction port is moved to the left and right by about 90 degrees by the twisting operation of the hand operation unit. ° was configured to rotate.

[0003]

However, in the conventional mouthpiece, since the casing is formed by bending the casing in an approximately L-shape, the airflow in this portion is disturbed and noise is generated.

[0004] Further, since the suction joint rotates in the left-right direction with respect to the casing, when the suction body is operated in the advancing direction with the rear of the casing close to the surface to be cleaned, the suction body fluctuates. .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, reduce the noise generated by the turbulence of the air flow, and improve the operability of the vacuum cleaner in which the suction body is prevented from wandering and the operability is improved. To provide.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is characterized in that a suction main body formed by attaching an upper case to a lower case and a vertical direction with respect to the suction main body. A first connecting pipe rotatable; and a second connecting pipe rotatable in the left-right direction with respect to the first connecting pipe. The first connecting pipe has an inner surface provided with the first connecting pipe. The tongue is formed so as to overlap the second connecting pipe from the connecting pipe.

Another feature of the present invention is that a suction body formed by attaching an upper case to a lower case is connected to one end of the suction body so as to be vertically rotatable. A first connecting pipe having a first flange formed on the other end, and a second flange facing the first flange of the first connecting pipe formed on one end; A second connecting pipe connected to the extension pipe, wherein the second connecting pipe is inserted so as to sandwich the first flange section and the second flange section from the outside, covers the first connecting pipe, and has a concave section at the rear. Is provided, and the second connection pipe is provided with locking means for fitting into a concave portion of the joint cover.

[0008]

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

FIG. 17 is a perspective view of the external appearance of a vacuum cleaner according to one embodiment of the present invention. In FIG. 17, 1501 denotes a main body of a vacuum cleaner in which a control circuit, an electric blower and the like are incorporated, and 1502 denotes a main body of the vacuum cleaner 1501. Hose connected to suction port, 150
Reference numeral 3 denotes a hose hand that is held by a user and connects a hose to one end thereof; 1504, an extension tube connected to the other end of the hose hand 1503; 1505, a mouthpiece connected to the extension tube 1504; The switch operation unit provided in the hand unit 1503 is shown.

[0010] Next, the operation of the vacuum cleaner according to the present invention will be described.
By operating the switch operation unit 1506 provided in 3,
The cleaner is controlled via a control circuit built in the cleaner body 1501.

The suction body 1505 includes a suction body 101 having a suction port 116 for sucking dust, and a suction body 101.
Is connected to the extension tube 1504, and the bottom surface of the suction main body 101 always operates so as to contact the floor surface in response to the movement of the hose hand portion 1503 transmitted through the extension tube 1504, and the dust sucked from the suction main body 101. And the universal joint 118 that communicates so that the air flow containing the air is guided to the extension pipe 1504.

The universal joint portion 118 is rotatably connected to the height direction Y of the hose hand portion 1503 and the left and right direction X about the mouthpiece 1505, and is connected to the hose hand portion 155.
The suction body 101 as it is
The mechanism for transmitting the rotation P2 is provided.

In this embodiment, a universal joint 118 is rotatably attached to the suction main body 101, and is provided with a casing 203 which is rotatable in the vertical direction Y.
4 is attached to the casing 203 and the other end is attached so as to enable rotation in the left-right direction X with the casing 203.
04.

By doing so, the hose hand 15
The direction of the mouthpiece 1505 can be changed by the operation of 03.

That is, by twisting the hose hand portion 1503 by 90 degrees (rotation P1), the mouthpiece 1505
As shown by the dotted line 7, it can be rotated 90 degrees (rotation P2).

In this state, if a normal operation in the front-rear direction is performed, it is possible to clean the suction main body 101 up to a gap having a width in the short direction.

In this state, when the front edge of the suction main body 101 is brought into contact with the wall and the hose hand portion 1503 is moved in the normal front-rear direction, the suction main body 101 moves along the wall surface. Cleaning can be performed efficiently.

Next, the structure of the mouthpiece 1505 will be described with reference to FIG.
This will be described with reference to FIG.

FIG. 1 shows a suction main body 1 according to an embodiment of the present invention.
2, FIG. 2 is a top view of the suction main body 101, FIG. 3 is a front view of the suction main body 101, and FIG.
01 is removed, and FIG. 5 is AA in FIG.
6 is a bottom view of the universal joint portion 118, and FIGS.
9 is a sectional view taken along the line BB in FIG. 1, FIGS. 9A and 9B are bottom and side views of the casing 203, and FIGS. 10A and 10B are sectional and bottom views of the joint cover 105. 11 (a),
(B) and (c) are a bottom view and a cross-sectional view of the joint fixing member 501,
12 and 13 are sectional views taken along the line EE in FIG. 1, FIG. 14 is a sectional view of the front wheel 106, FIG. 15 is a side view of a state in which the suction body 1505 is hung with the suction joint 104, and FIG. FIG.

The suction main body 101 is divided into upper and lower parts at a position at a height substantially at the center thereof, and is constituted by a lower case 102 forming an outer shell and an upper case 201 disposed on the upper part of the lower case 102. Is formed.

A bumper 103 is mounted on the outer periphery of the position where the lower case 102 and the upper case 201 are in contact with each other to maintain airtightness and prevent damage to furniture and the like. The bumper 103 is made of a high sliding resin to which a fluororesin powder and silicone oil are added based on an alloy of hydrogenated styrene-butadiene rubber and polypropylene, and is used when the shock-absorbing bumper comes into contact with the wall surface by cleaning the wall. High slidability is secured.

In this embodiment, 5% of tetrafluoroethylene and 5% of silicone oil are used as the fluororesin powder.
%, But the fluororesin powder may be adjusted to 2 to 20% and the silicone oil may be adjusted to 2 to 20% depending on the required sliding performance.

Further, perfluoroalkoxy, fluorinated ethylene propylene, fluorinated ethylene propylene ether or the like may be used as the fluororesin powder.

Further, as an additive for obtaining slidability, inorganic lubricants such as talc, calcium titanate, graphite, molybdenum disulfide and the like, and organic lubricants such as wax, metal salts of organic fatty acids and fatty acid amides are used. It may be added to the material.

Further, in addition to the above-mentioned base materials,
Nylon 12 elastomer, polyurethane elastomer, polyester elastomer, polyolefin elastomer, polystyrene elastomer, soft polyethylene or the like may be used.

The nylon 12 elastomer has a slidability even when used alone, and may be used alone without adding any additive.

As described above, since the bumper 103 is formed of a highly slidable material, the bumper 150 is brought into contact with the shock absorbing bumper 103 while cleaning the wall, for example, by the wall.
The operability when moving 5 can be improved.

Behind the suction body 101, the universal joint 11
8 are provided.

The universal joint portion 118 includes a substantially cylindrical casing 203, a suction joint 104, a joint cover 105, and a joint fixing member 501.

The casing 203 has a casing flange 502 and a casing cylinder 503 formed therein, and the suction joint 104 has a joint flange 504 and a joint cylinder 505 formed therein.

Also, as shown in FIG.
05 has a substantially U-shaped joint fixing portion 506 and a fixing concave portion 1001 formed therein.

Further, as shown in FIG. 11, the joint fixing member 501 has a joint holding portion 507 and a screw boss receiving portion 1101.
Are formed.

Then, the joint cylinder 505 of the suction joint 104 is inserted into the casing cylinder 503 of the casing 203,
The casing flange portion 502 of the casing 203 and the joint flange portion 504 of the suction joint 104 are connected to the joint cover 105.
The fitting cover 105 is fitted in the direction A of FIG.

Thereafter, the joint fixing member 501 and the screw boss receiving portion 1101 thereof are connected to the fixing recess 10 of the joint cover 105.
01 and screw boss 90 of casing 203
5 and screwed to the casing 203, the casing 203 and the suction joint 104 are fixed in the directions B and C in FIG. 5, and are disposed rotatably around the D axis. 203 is fixed.

With this configuration, the casing cylinder portion 503 and the joint cylinder portion 505 ensure good rotation, and almost the entire periphery of the casing flange portion 502 and the joint flange portion 504 are fixed to the joint fixing portion 506. And the joint holding portion 507, it is possible to secure high strength.

Further, since the suction joint portion 118 can be disassembled by removing the screw 601, it is possible to remove dust even if the flow path is clogged.

Further, a tongue 508 is formed on the rear side inside the casing 203 so as to overlap with the inside of the suction joint 104 and below the joint surface between the casing flange 502 and the joint flange 504. . This tongue 5
08 is formed smoothly from the casing 203 toward the suction joint 104, and rectifies the airflow flowing from the casing 203 toward the suction joint 104 so as to flow smoothly. Thus, noise generated due to the turbulence of the airflow can be reduced, and flow loss can be reduced.

Further, since the suction joint 104 is provided below the casing 203, the height of the suction body 1505 can be reduced, and the bottom of a bed or a sofa can be cleaned.

A portion of the casing 203 on the side of the suction main body 101 is provided with a pair of rotary cylinder portions 902 which enable rotation about the horizontal rotary shaft 402 shown in FIG.

Then, the upper case 201 and the lower case 102
Are provided with rotary bearings 701 and 702, respectively.
The casing 203 is rotatably connected to the suction main body 101 about the horizontal rotation axis 402 by sandwiching the rotary shaft 02 between the rotary bearings 701 and 702.

The horizontal rotating shaft 402 is disposed within the rectangular frame of the mouthpiece and forward of the rear end 102a in the longitudinal direction of the mouthpiece.

Thus, the balance of the suction body is improved, and when the suction body is lifted from the cleaning surface, the suction body does not inadvertently rotate around the horizontal rotation axis 402, and the suction body and the connecting pipe at the time of the lifting are lifted. , The operability is improved.

The lower case 102 has a pair of front wheels 10 so that the suction main body 101 is moved in the front-rear direction and a predetermined distance is maintained between the lower surface of the suction main body 101 and the cleaning surface.
6 and a rear wheel 107 are provided.

The rotation axis of the front wheel 106 is
01 is disposed at an angle of about 30 ° with respect to the longitudinal direction.

In this manner, the outer periphery of the front wheel 106 is unevenly worn, regardless of whether the mouthpiece 1505 is operated in the longitudinal direction or the short direction, since the front wheel 106 is constantly rotating. Since it wears evenly without any noise, it is possible to suppress the rumbling sound during operation.

The front wheel 106 comprises a tire portion 1401 and a bearing portion 1402 as shown in FIG. 14, and the tire portion 1401 is formed of a material having high sliding and high wear resistance.

By doing so, it is possible to ensure good running performance on any cleaning surface.
06 can be maintained, and scratches on the cleaning surface can be prevented.

The horizontal rotating shaft 402 is connected to the front wheel 106.
And the lateral movement wheel 108. This is because when the mouthpiece is moved in the lateral direction (longitudinal direction of the mouthpiece), the operating force of the user transmitted to the connecting pipe is distributed to the front wheel 106 and the lateral movement wheel 108. is there. Thereby, the operating force when the suction body is moved in the lateral direction can be reduced, and the wear of the front wheel 106 and the lateral movement wheel 108 can be prevented.

In this embodiment, the bearing 1 is formed by POM.
By molding 402 and press-fitting a tube formed of polytetrafluoroethylene into the bearing 1402,
Although the front wheel 106 is formed, the tire portion 1401 may be formed around the bearing portion 1402 by secondary molding using a tetrafluoroethylene-based material, or the tire portion 1402 may be formed.
1. The bearing 1402 may be integrally formed of a tetrafluoroethylene-based material.

The lower case 102 has a universal joint 11
8, a lateral movement wheel 108 and a wiping brush 109 which are pivotally supported substantially at right angles to the rear wheel 107.
A pair of wheel bases 110 are rotatably supported.

The wheel base 110 is urged downward by a spring 1601, and when the mouthpiece 1505 is operated in the short direction, that is, in FIG.
When the angle is between 0 °, the rotation restricting projection 801 formed on the wheel base 110 is locked by the rotation restricting rib 904 formed on the casing 203 to restrict the rotation range of the wheel base 110, and The state in which the lateral movement wheel 108 is floating about 1.5 mm on the floor is set as the lowest position, and the wheel base 110 is set so as to be able to protrude and retract.

When the mouthpiece 1505 is operated in the longitudinal direction, that is, when the angle α is about 90 ° in FIG. 5, the rotation regulating projection 801 formed on the wheel base 110 and the casing 203 are formed. The rotation restricting rib 904 is disengaged, and the wheel projection 903 formed on the casing 203 pushes the wheel base 110 downward, and the wheel base 110 protrudes from the lower case lower surface, and the angle α
Is set to be maximum, the rear wheel 107 rises above the floor surface by about 2 mm.

In this way, when the mouthpiece 1505 is moved in the longitudinal direction, the casing 203 is pivoted almost to the uppermost part, that is, the angle α becomes maximum, so that the rear wheel 107 rises above the floor surface. On the other hand, since the laterally moving wheel 108 which is pivotally supported substantially at right angles to the rear wheel 107 comes into contact with the ground, good traveling performance can be obtained even when the laterally moving wheel 108 is moved in the longitudinal direction.

When the mouthpiece 1505 is operated in the short direction, the laterally moving wheel 108 is approximately 1.5 mm from the floor surface.
Since it floats with the above-mentioned interval, it does not become a resistance at the time of operation and can maintain good operability.

A suction port 116 is formed substantially at the center of the lower case 102, and a suction channel 112 having a substantially semicircular cross section is formed on the left and right sides.

Further, a suction opening 115 is provided on the side surface of the lower case 102, and a ventilation groove 114 and a ventilation hole 113 communicating with the suction passage 112 are formed near both sides.

The pressure control plate 111 is provided in front of the suction channel 112.
Is disposed behind the suction flow channel 112.
Are arranged.

The upper case 201 has an intake port 202 formed therein.

An intake passage 401 is formed inside the intake main body 101 to allow the air guide port 113 and the intake port 202 to communicate with each other.
A shielding rib 1201 is formed in the middle of the intake passage 401.

Further, a shielding plate 1202 is formed opposite to the shielding rib 1201 and integrally with the wheel base 110.

Next, a method of collecting dust from the suction body will be described.

On the wooden floor, as shown in FIG. 13, wiping brushes 109 and 117 come into contact with the wooden floor surface, and
The wooden floor can be wiped by moving 1 in the front-back direction.

At this time, the intake flow path 401 is
1 and the shielding plate 1202, as shown in FIG.
The wind hardly flows through 2 and the static pressure in the suction channel 112 increases, so that appropriate dust collection performance can be obtained.

In this embodiment, the wipes 109 and 1 are used.
Reference numeral 17 denotes a suction channel 11 because hair is continuously woven.
2 has the effect of maintaining the static pressure.

In this embodiment, the brushes 109 and 117 are made of a brush material in which soft hairs are continuously woven, but a brushed cloth or a paper towel may be used.

Next, the method of collecting dust on the carpet will be described. On the carpet, the front wheels 106 and the rear wheels 10
7 sinks and the wipe 109 rises to the position shown in FIG.

At this time, the shielding rib 1201 and the shielding plate 120
The relationship of 2 is as shown in FIG.
Is opened, and the upward flow 12
03 flows in, and at the same time, downward flow 1204 from the air guide groove 114.
Flows in.

The upward flow 1203 and the downward flow 1205
The counterclockwise swirling flow in FIG.

Further, the air guide opening 113 and the air guide groove 114 are arranged at 0 ° to 60 ° with respect to the front and rear direction toward the center of the suction main body 101.
The air flow from the suction opening 115 on the side surface does not obstruct the air flow in the left-right direction in the suction flow path 112, and becomes a spiral swirling swirling flow. It flows into the mouth 116.

As described above, on the carpet, a swirling swirl flow is generated in the suction flow channel 112, and thereby the dust is scraped up, so that the dust collecting performance is improved.

Further, since the intake passage 401 is opened, the static pressure in the intake passage 112 is reduced, and the operating force can be reduced.

Further, since the wiping brush 109 is urged downward by the spring 1601, it has an effect of scraping dust.

Next, the operation when rotating the mouthpiece 1505 will be described.

In FIG. 17, when the user holds the hose hand portion 1503 and twists the extension tube 1504 counterclockwise around the E axis, the casing 203 rotates counterclockwise with respect to the suction joint 104, and The mouth body 101 starts to rotate counterclockwise with respect to the upper part 101.

Then, the hose hand part 1503 is set to about 90 °
5, the casing 203 is substantially upright with respect to the suction main body 101, that is, α is approximately 90 ° in FIG.
1 is substantially parallel to the operation direction.

As described above, since the angle of the suction main body 101 can be controlled by the twist angle of the hose hand portion 1503, the width of the suction body 1505 with respect to the operation direction can be variously changed. It can improve the efficiency when cleaning complicated places such as underneath.

When the mouthpiece body is rotated by 90 °, the casing 203 is substantially upright with respect to the mouthpiece body 101, that is, α in FIG.
As described above, the wheel base 110 protrudes from the lower case 102, the rear wheel 107 floats, and the laterally moving wheel 108 comes into contact with the ground, so that good operability can be obtained.

Further, in this state, if the front edge of the mouthpiece main body 101 is brought into contact with the wall surface and operated back and forth, the cleaning of the wall can be efficiently performed.

In this embodiment, the casing 20
Since the center of rotation of the suction body 3 with respect to the suction body 101 is set at substantially the center in the short direction, when the suction body 1505 is lifted from the cleaning surface, the lower surface of the suction body 101 faces substantially downward as shown in FIG.

In this way, even if the suction body 1505 is lifted during cleaning, the bottom surface of the suction mouth is always facing downward, so that it is possible to continue cleaning with the suction body 1505 placed on the lower surface, thereby improving the ease of handling.

As described above, according to the present embodiment, the mouthpiece 1
Since the height dimension of 505 can be reduced, it is possible to clean a bed or under a sofa, and the lateral movement wheel 108 protrudes from the lower case as appropriate. The operability of the lateral operation can be improved without hindrance, and the wooden floor can be wiped with a wiping brush, so that the cleaning efficiency can be improved.

Next, another embodiment of the present invention will be described with reference to FIGS.

FIG. 18 shows a mouthpiece 150 according to this embodiment.
19 is a top view in a state where the upper case 201 is removed from FIG. 1, FIG. 19 is a longitudinal sectional view in FIG. 18, FIG. 20 is a side view of the suction body 1501, and FIG. FIG. 22, FIG. 22 is a side view of the casing 203 and the suction joint 104, and FIG.
It is sectional drawing. Note that the same reference numerals are given to parts common to the above embodiments.

18 to 23, reference numeral 1801 denotes a rotary cleaning body disposed in the suction port 116, and turbines 1802 are disposed on both sides of the rotary cleaning body 1801 in the axial direction.

Above the inlet joint 104, a joint cover 1
A stopper 1804 which is fitted to a concave portion 1803 formed in 05 as a locking means is provided. This stopper
The upper portion 1804 is covered with a stopper cover 1806, and the claw portions 23 formed on the stopper cover 1806 are formed.
01 is fitted to the inlet joint 104 by fitting it into a hole 2201 formed in the inlet joint 104. Note that this hole 2201 is viewed from the outside of the suction joint 104 in FIG.
The hole 2201 can be hidden by attaching a warning seal 2001 as shown in FIG.

The stopper 1804 has a built-in spring 1805 having elasticity.
804 is urged to press against the concave portion 1803 of the joint cover 105.

The mouthpiece joint 104 according to the present embodiment is arranged so as to be rotatable in the left-right direction with respect to the traveling direction of the mouthpiece 1501, and fluctuates in the left-right direction when the mouthpiece 1501 is operated. A condition arises. For this reason, in the present embodiment, the stopper 1804 is fitted into the concave portion 1803 to ensure the straight running stability in the traveling direction.

When the hose hand portion 1503 is twisted in the left-right direction, as shown in FIG.
804 gets over the concave portion 1803 and the hose hand portion 15
In response to the operation of 03, the mouthpiece rotates in the left-right direction. The elastic force of the spring 1805 may be set appropriately so that the mouthpiece 1501 can be easily rotated in accordance with the operation of the hose hand 1503.

According to the present embodiment, the stopper 180
4 is fitted in the concave portion 1803, so that the straight running stability in the traveling direction of the mouthpiece 1501 can be secured, and the operability is improved.

[0090]

As described above, according to the present invention, the tongue is formed on the inner surface of the first connecting pipe so as to overlap the first connecting pipe with the second connecting pipe. The airflow flowing from the connection pipe to the second connection pipe flows smoothly, and noise due to turbulence in the airflow can be reduced.

According to the present invention, the second connecting pipe has:
Since the locking means that fits into the recess of the joint cover is arranged,
The straightness of the mouthpiece can be secured by preventing the mouthpiece from wobbling, and the operability can be improved.

[Brief description of the drawings]

FIG. 1 shows a suction main body 10 according to an embodiment of the present invention.
1 is a bottom view of FIG.

FIG. 2 is a top view of the mouthpiece main body 101. FIG.

FIG. 3 is a front view of the mouthpiece main body 101.

FIG. 4 is a top view in a state where an upper case 201 is removed in FIG. 2;

FIG. 5 is a sectional view taken along line AA in FIG. 1;

FIG. 6 is a bottom view of the universal joint part 118.

FIG. 7 is a sectional view taken along the line BB in FIG. 1;

FIG. 8 is a sectional view taken along the line BB in FIG. 1;

FIG. 9 is a bottom view and a side view of the casing 203.

FIG. 10 is a sectional view and a bottom view of the joint cover 105.

FIG. 11 is a bottom view and a cross-sectional view of the joint fixing member 501.

FIG. 12 is a sectional view taken along the line EE in FIG. 1;

FIG. 13 is a sectional view taken along the line EE in FIG. 1;

14 is a sectional view of the front wheel 106. FIG.

FIG. 15 is a side view of a state where the mouthpiece 1505 is hung with the mouthpiece joint 104 held.

FIG. 16 is a sectional view taken along line FF in FIG. 1;

FIG. 17 is a perspective view of an external appearance of a vacuum cleaner according to an example of an embodiment of the present invention.

FIG. 18 is a top view in a state where the upper case 201 is removed from the mouthpiece 1501 according to the present embodiment.

19 is a vertical sectional view in FIG.

20 is a side view of the mouthpiece 1501. FIG.

FIG. 21 is a top view showing a turning operation of the casing 203 and the suction joint 104.

FIG. 22 is a side view of the casing 203 and the inlet joint 104.

23 is a sectional view taken along the line GG in FIG.

[Explanation of symbols]

101: Suction body, 102: Lower case, 103: Bumper, 104: Suction joint, 105: Joint cover, 106:
Front wheel, 107: Rear wheel, 108: Wheel for lateral movement, 10
9,117 ... wiping brush, 110 ... wheel base, 111 ...
Pressure control plate, 117: Wiping brush, 201: Upper case, 2
02: intake port, 203: casing, 401: intake channel, 508: tongue, 1803: concave, 1804: stopper, 1806: stopper cover.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Taiji Tajima 502 Kandate-cho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratories, Hitachi, Ltd. F-term (reference) in Taga headquarters, Hitachi, Ltd., Electrical Equipment Division 3B057 BA02 BA09 BA21 3B061 AA06 AA21

Claims (2)

[Claims] 1. A suction body formed by attaching an upper case to a lower case, a first connection pipe rotatable vertically with respect to the suction body, and a first connection pipe. A second connecting pipe rotatable in the left-right direction, wherein a tongue is formed on an inner surface of the first connecting pipe so as to overlap the second connecting pipe from the first connecting pipe. Characteristic mouthpiece of vacuum cleaner. 2. A suction body formed by attaching an upper case to a lower case, one end of which is connected to the suction body so as to be vertically rotatable, and a first flange portion on the other end. And a second connection for forming a second flange on one end opposite to the first flange of the first connection and connecting the other end to the extension pipe. A joint cover that has a pipe, is inserted so as to sandwich the first flange part and the second flange part from the outside, covers the first connection pipe, and has a recess formed in the rear. A suction means for the second connection pipe, the locking means being fitted into a recess of the joint cover;