JPH09140640A - Suction opening casing for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently rotate an air turbine at the time of cleaning and to easily stop the rotary blade at other times. SOLUTION: In a housing 15, a turbine chamber 33 is dividedly formed that communicates with the outside through an intake port and that axially supports an air turbine 46 freely rotatably. The downstream side of the intake of the turbine chamber 33 is communicated with an air passage chamber 21 communicative with a suction chamber 20 in which an intake port 24 is opened. In the lower part of a housing 12, a leak port 26 is formed which is larger in both opening area and intake capacity than the intake port communicating with the air passage chamber 21 and with the downstream side of the intake of an air turbine 46. A projection 27 bulging downward like a wall is provided at the opening edge of the leak port 26, while a pair of elastic pieces 28 are attached to the front and back opening edges of the leak port 26. The traveling of a suction opening casing 11 elastically transforms the elastic pieces 28 to the side opposite to the travelling direction, to block the leak port 26, so that the air turbine is rotated by the intake air flow from the intake port. When lifting the suction opening casing 11, an air intake is actuated from the leak port 26 to stop the air turbine 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port body of an electric vacuum cleaner provided with an air turbine for rotationally driving a rotary cleaning body.

[0002]

2. Description of the Related Art Conventionally, as a suction port body of an electric vacuum cleaner provided with an air turbine of this kind, for example, Japanese Patent Laid-Open No. 7-596.
The configuration described in Japanese Patent Publication No. 85 is known.

The suction port body of the electric vacuum cleaner disclosed in Japanese Patent Laid-Open No. 7-59685 has a plurality of blades in the suction air passage between the suction port and a communication pipe to which a hose or extension pipe is connected. An air turbine that is rotated by the suction airflow is rotatably supported by a rotating shaft, and an endless belt is stretched around the end of the rotating shaft and the pulley provided at the end of the rotary cleaning body to rotate by the rotation of the air turbine. The cleaning body is rotated. Further, a bypass air passage is provided in communication with the suction air passage. Further, wheels that are separate from the running wheels are pivotally supported by a movable member that has a valve body that opens and closes the bypass air passage.

When the suction port faces the floor surface and the traveling wheels are installed on the floor surface, the wheel sinks into the case body on the floor surface, the valve body blocks the bypass air passage, and the suction port The air turbine efficiently rotates due to the intake airflow from the rotating cleaning body, and when the traveling wheels are lifted from the floor, the wheels project downward and move the movable member to bypass the valve body. The air passage is opened to cause leakage, and for safety, the rotation of the air turbine is almost stopped to stop the rotation of the rotary cleaning body.

[0005]

However, in the suction port body of the conventional vacuum cleaner disclosed in the above-mentioned Japanese Patent Laid-Open No. 7-59685, efficient rotary cleaning by highly efficient rotation of the air turbine at the time of cleaning. In order to stop the rotating cleaning body to ensure safety when rotating and lifting the body,
A movable wheel that detects whether it is lifted from the floor and a mechanical structure with a valve body that opens and closes the bypass air passage are required, increasing the number of parts and increasing the weight and increasing the size. At the same time, there is a problem that the cost increases.

In view of the above-mentioned problems, the present invention provides a suction port body of an electric vacuum cleaner which has a simple structure and in which the air turbine rotates efficiently at the time of cleaning and the rotation of the rotary cleaning body is easily reduced outside the cleaning. It is intended to be provided.

[0007]

A suction port body of an electric vacuum cleaner according to claim 1 has a suction port opening at a lower surface facing a surface to be cleaned and an intake port located above the suction port. A case body, a communication pipe that is provided in the case body and communicates with the suction port and the suction port, a rotary cleaning body that is rotatably disposed in the case body so as to face the suction port, and the case body. An air turbine that is disposed between the intake port and the communication pipe and is rotatably arranged by an intake airflow to drive the rotary cleaning body to rotate; and an air turbine and the communication pipe on the lower surface of the case body. A leak opening formed in communication with the leak opening and a leak opening projecting downward in the vicinity of both edges of the leak opening that face the traveling direction of the case body, respectively, and are bent when elastically bent. Block the leak It is equipped with a pair of elastic pieces, and when placed on the surface to be cleaned and run on the surface to be cleaned, a pair of elastic pieces provided at the edge of the leak port facing the running direction of the case body run. Elastically deforms in the direction opposite to the direction, and closes the leak port that communicates between the air turbine and the communication pipe and opens.
The air turbine is rotated by the suction airflow sucked from the intake port, and the rotary cleaning body facing the suction port is rotated. The elastic piece returns to the original state where it projects downward, the leak port opens, the air is sucked from the leak port, the intake amount from the intake port decreases, the rotation of the air turbine decreases, and The rotation also decreases.

The suction port body of the electric vacuum cleaner according to claim 2 is
The suction port body of the electric vacuum cleaner according to claim 1, wherein the lower surface of the case body is located near the base end of the elastic piece, on the side opposite to the edge of the leak port, and extends downward along the edge of the leak port. A protrusion is provided to project.Because the protrusion is formed near the base end of the elastic piece along the edge of the leak port on the opposite side to the edge of the leak port, it is placed on the surface to be cleaned and traveled. The base end of the elastic piece that deforms so as to face the lower surface of the case body on the side opposite to the running direction, and the elastic piece that closes the leak port and the tip end is located at the base end of the other elastic piece The tip end of the leak-proof member is sandwiched between the surface to be cleaned and the protrusion, and the leak port is reliably closed.

The suction port body of the electric vacuum cleaner according to claim 3 is
The suction port body of the electric vacuum cleaner according to claim 1 or 2, wherein the pair of elastic pieces are provided with their lower ends inclined toward the opposite side to the facing direction, and are placed on the surface to be cleaned and run. In this case, one elastic piece provided near the edge of the leak port located on the traveling direction side is elastically deformed in the opposite direction to the traveling direction, and the other elastic piece is inclined in the elastically deforming direction. Therefore, when the elastic deformation direction of the elastic piece is switched by switching the traveling direction, only one elastic piece is elastically deformed, so that the traveling direction can be smoothly switched.

The suction body of the vacuum cleaner according to claim 4 is
The suction opening body of the electric vacuum cleaner according to any one of claims 1 to 3, wherein the pair of elastic pieces are provided with naps on the surfaces opposite to the facing direction, and are placed on the surface to be cleaned and run. When the elastic piece is elastically deformed in the direction opposite to the running direction, the surface of the elastic piece that closes the leak port is opposite to the leak port and faces the surface to be cleaned. The frictional resistance with the surface is reduced and the running property is improved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A structure showing an embodiment of a suction port body of an electric vacuum cleaner of the present invention will be described below with reference to the drawings.

In FIG. 1 to FIG. 3, reference numeral 11 denotes a suction port main body which is elongated in the traveling direction, and the suction port main body 11 includes a lower main body case 12 made of synthetic resin such as acrylonitrile-butadiene-styrene resin. Lower body case 12
The upper body case 13 of the same material that is coupled and fixed to the upper part of the rectangular body case is joined by sandwiching the bumper 14 along the peripheral surface including the front surfaces of the lower body case 12 and the upper body case 13. 15 are formed.

A rib portion 19 is formed on the upper surface of the lower body case 12 substantially vertically, and a horizontally long suction chamber 20 is formed in the front side, which is the traveling direction side, in the substantially left-right direction. Further, the lower main body case 12 has an air passage chamber 21 which communicates with the suction chamber 20 in a substantially rear center thereof, a drive transmission chamber 22 which is formed in a groove shape from one end to one end side from the substantially center, and a drive transmission chamber one end side. A drive chamber (not shown) which is communicated with 22 and which is partitioned on one end side of the suction chamber 20 is defined. Further, the suction port of the suction chamber 20 is provided on the lower surface of the suction port main body 11 facing the floor surface, which is not shown, to be cleaned.
24 is formed with an opening.

Further, the lower body case 12 has a drive transmission chamber.
A leak port 26, which is located on the rear side of 22 and has a longitudinal direction in the left-right direction, is formed in communication with the air duct chamber 21. A projecting portion 27 that bulges downward in the shape of a wall is formed at the opening edge of the leak port 26. Further, a pair of elastic elongated plate-like elastic pieces 28 are attached to the front and rear opening edges of the leak port 26 so as to face each other and project downward in a wall shape. When the elastic pieces 28, 28 are flexed against the elasticity, their peripheral edges come into contact with the protrusions 27 to hermetically close the leak ports 26.

The bulging dimension of the protrusion 27 is such that when the suction port body 11 is placed on a floor surface, which is a surface to be cleaned (not shown), an elastic piece is provided between the tip of the protrusion 27 and the floor surface. A gap corresponding to the thickness dimension of the elastic pieces 28, 28 between which the 28, 28 are sandwiched is set to be the distance between the tip of the protrusion 27 and the facing floor surface.

On the other hand, a dome portion 31 is formed in a substantially semi-circular shape so as to project upward at a substantially central portion of the upper body case 13.
A substantially funnel-shaped middle case 32 having a large diameter in the upper portion and a small diameter in the lower portion is attached to the dome portion 31, and a turbine chamber 33 is defined therein. An intake port 34 communicating with the turbine chamber 33 is formed on the rear side of the upper main body case 13, and a filter 35 is provided in the intake port 34 in a closed state. The opening area between the leak port 26 and the intake port 34 is
Is formed much larger, the intake resistance from the leak port 26 is smaller than that from the intake port 34, and the intake amount taken from the leak port 26 is much larger than the intake amount taken from the intake port 34.

Further, a communication hole 37 is cut out at the lower end of the middle case 32 so that the turbine chamber 33 communicates with the leak port 26 and the air passage chamber 21. A bearing portion 40 is provided outside the upper edge of the communication hole 37 so as to pivotally support the rotary shaft 39 of the communication pipe 38 attached to the rear center of the suction port body 11 with the lower body case 12.

A bearing mounting rib 43 for mounting the first bearing 42 is provided substantially in the center of the dome portion 31 of the upper main body case 13, and the first bearing 42 is provided at the lower end of the middle case 32. A bearing mounting rib 45 for mounting the second bearing 44 is provided coaxially with the above. Then, these first and second bearings 42, 44
Rotatably supports the shaft body 47 of the air turbine 46,
An air turbine 46 is rotatably supported in the turbine chamber 33. A turbine pulley 48 is integrally provided coaxially at the lower end of the shaft body 47 of the air turbine 46.

The lower end of the middle case 32 is brought into contact with the rib portion 19 defining the drive transmission chamber 22 of the lower main body case 12, and the upper surface of the drive transmission chamber 22 is a lid (not shown) provided at the lower end of the middle case 32. The case body 15 is closed by the body, and the upper body case 13 and the lower body case 12 are joined to form a case body 15.

Further, at the center of the rear portion of the suction port body 11, a communication pipe 38 is provided with a rotary shaft 39 for the middle case 32 and the lower body case 12.
It is rotatably supported by and is rotatably attached at a predetermined vertical angle. The front end of the communication pipe 38 is the air duct chamber.
It is rotatably fitted into the inside of the suction chamber (21), faces the substantially central portion of the suction chamber (20), and communicates with the suction chamber (20) through the air passage chamber (21). On the other hand, the rear end of the communication pipe 38 projects rearward outward from the suction port body 11, and the bent front end of the connecting pipe 51 is rotatably fitted to the rear end. The connecting pipe 51 is detachably connected to the hose via an extension pipe (not shown) and further connected to an electric vacuum cleaner body (not shown). And the suction chamber
20 is communicated with the dust collection chamber of the electric vacuum cleaner body through the air passage chamber 21, the communication pipe 38, the connection pipe 51, an extension pipe (not shown) and a hose.

A driven rear wheel chamber 54 is provided on both sides of the communication pipe 38 of the lower main body case 12 in which a driven rear wheel 53 is rotatably supported, and driven front wheels 55 are rotatably provided at both front end sides. A driven front wheel chamber 56 that is axially supported is formed.

On the other hand, the suction chamber 20 is provided with a pair of rotary blades 61 as rotary cleaning members. These rotary blades 61, 61 are provided with a plurality of spirally flexible blade portions (not shown) on their outer peripheral surfaces. Further, a pulley (not shown) is integrally provided at one end of each of the rotary blades 61, 61. The rotary blades 61, 61 rotate with their respective pulleys located inside the drive chamber, and shafts (not shown) rotatably provided at both ends in the axial direction engaged with bearings provided on the case body 15. It is supported freely.

It should be noted that the rotary blades 61, 61 do not come into contact with a flat floor surface such as a space between boards, but have contact with an elastically deformable floor surface such as a carpet or tatami mat.
The lower ends of the 1, 61 are provided so as to project slightly downward from the suction port 24.

The turbine pulley of the air turbine 46
An endless belt (not shown) is wound around the pulleys of the rotary blades 61 and 61 in the drive transmission chamber 22 and the drive chamber via various pulleys, and the rotation of the air turbine 46 causes the rotary blades 61 and 61 to move in opposite directions. It is designed to rotate.

Further, an intake adjusting member 63 which is slidable in the left-right direction is provided in the suction port body 11. The intake adjusting member 63 projects upward from a valve body (not shown) that opens and closes an intake port 34 that communicates with the turbine chamber 33, and an operation opening 64 that has a longitudinal direction in the left-right direction and opens on the upper surface of the upper main body case 13. It has a knob portion 65. And the knob portion 65
By sliding the control opening 64 in the longitudinal direction of the operation opening 64, the intake adjusting member 63 slides, and the valve body adjusts the opening degree of the intake port 34 to adjust the intake amount to the turbine chamber 33. It has become.

On the other hand, in order to improve the airtightness of the suction chamber 20 and to improve the dust collecting property at the wall, the wall is downwardly protruded from the lower part of the front surface of the suction port main body 11 toward the floor surface. A protruding seal lip (not shown) is formed.

Next, the operation of the above embodiment will be described.

At the time of cleaning, the suction port main body 11 is connected to an electric vacuum cleaner main body (not shown) through an extension pipe and a hose. Next, according to the state of the floor surface, the knob portion 65 of the air intake adjusting member 63 is appropriately slid to adjust the opening of the suction port 24, and the hose is pushed while gripping the extension pipe side end. Then, the suction port main body 11 is moved forward and backward while being in contact with the floor surface that is the surface to be cleaned.

When the suction inlet body 11 is placed on the floor,
The elastic pieces 28, 28 are flexible so as to be crushed on the floor surface. Then, when the suction port body 11 moves forward, as shown in FIG. 4, due to the friction between the floor surface and the elastic pieces 28, 28, the pair of elastic pieces 28, 28
Flexes rearward on the side opposite to the traveling direction. This elastic piece 2
By the flexibility of 8 and 28, the rear elastic piece 28 is flexed so that the base end portion is pressed against the rear protrusion 27, and the front end of the front elastic piece 28 is rear elastic piece 28. Of the elastic piece 28 is pressed against the base end portion of the elastic member 28 so that the side surfaces of the protrusions 27 at both end portions of the leaking portion 26 are closed so that the edge of the end portion of the elastic piece 28 is closed. Is blocked by.

When the suction port body 11 is retracted,
As shown in FIG. 5, the elastic piece 28 on the front side is flexible so that the base end portion is pressed against the protrusion 27 on the front side, and the elastic piece on the rear side is
The tip of the elastic piece 28 is pressed against the proximal end of the elastic piece 28 on the front side, and the side edges of the protrusions 27 at both ends of the leak port 26 are contacted so that the edges of the elastic piece 28 are closed. It is flexible and the leak port 26 is airtightly closed.

When the rotary blades 61, 61 are rotated by a fold or carpet on the floor surface, the dust on the floor surface is sucked together with air from the suction port 24, and the suction chamber 20, the air duct chamber 21, and the communication pipe 38. , From the connection pipe 51 through the extension pipe and the hose to capture dust in the dust collection chamber inside the vacuum cleaner body,
The air turbine 46 is rotated by the suction airflow sucked from the communication hole 37 into the air passage chamber 21 through the turbine chamber 33 through the turbine chamber 33, and the rotary blades 61, 61 are rotated through the endless belt to remove dust from the floor surface. Scrap it up and inhale through the suction port 24.

In addition, the rotating blade 6
When the 1 and 61 are not rotated, the intake adjusting member 63 is slid to close the intake port 34, the generation of the suction airflow that rotates the air turbine 46 is stopped, and the rotation of the rotating blades 61 and 61 is stopped. Let's do the cleaning. The rotary blade 61,
When the blade portion of 61 is formed by raising or the like, it may be rotated for the purpose of polishing between the plates.

On the other hand, hair is entangled with the rotary blades 61, 61, and dust is blocked in the suction port 24.
When the suction port body 11 is lifted from the floor surface, the elastically deformed elastic piece 28 is elastically restored to the original shape protruding downward, and the leak port 26 is opened. Due to the opening of the leak port 26, the opening area of the leak port 26 is larger than that of the intake port 34, and the intake amount is larger at the leak port 26. Since the rotary blades 61, 61 are located at the mouth 24, the intake resistance is high. Therefore, some of the intake air from the intake opening 24 and the intake opening 34 is taken in from the intake opening 24 and the rest is taken out from the leak opening 26. The rotation of the air turbine 46 is stopped, and the rotation of the rotating blades 61, 61 is stopped. Therefore, even if the rotating blades 61, 61 are touched, the hand is not caught in the rotating blades 61, 61,
Safe and easy removal of entangled debris.

According to the above embodiment, when the suction port body 11 is placed on the floor surface, the leak port 26 is airtightly closed, and when the suction port body 11 is lifted from the floor surface, the elastic piece 28, Since the elastic piece 28 that restores the opening of the leak opening 26 and opens the leak opening 26 is provided in the vicinity of the opening edge of the leak opening 26, the elastic piece 28, 28 is provided in the leak opening 26 for simple cleaning. In this case, the air turbine 46 can be efficiently rotated by the suction airflow from the intake port 34 due to the airtight closing of the leak port 26, and the suction port main body
When the 11 is lifted, intake air leaks from the leak port 26, which has a larger opening area than the intake port 34 and a large amount of intake air, and the air turbine does not rotate. Dust and the like entwined with the blades 61, 61 can be safely and easily removed.

Further, since the protrusion 27 is formed so as to project along the edge of the leak port 26, the elastic piece 28 can easily and surely close the leak port 26 during cleaning, and the air turbine 46 can be efficiently rotated.

Further, since the leak port 26 is formed to be elongated along the longitudinal direction of the suction port body 11 and elastic pieces 28, 28 are provided on the leak port 26, the front side of the suction port 24 is sealed at the time of cleaning. Since it is surrounded by the lip and the rear side is surrounded by the elastic piece 28, the negative pressure of the suction port 24 can be increased, and the dust suction property can be improved.

In the above embodiment, not only the canister type vacuum cleaner but also the upright type in which the suction port body 11 is directly formed on the lower surface of the vacuum cleaner body,
It can also be applied to a self-propelled vacuum cleaner in which the vacuum cleaner main body and the suction port main body 11 are integrated.

Although the projection 27 is provided on the edge of the leak port 26 in the above description, the projection 27 may be omitted. When the protrusion 27 is not provided, when the suction port body 11 is placed on the floor surface and the elastic pieces 28, 28 are flexible to close the leak port 26, the negative pressure of the leak port 26 is reduced. The elastic pieces 28, 28 are leak ports
When the suction port body 11 is lifted up, the negative pressure of the suction port 24 decreases and the negative pressure of the air duct chamber 21 also decreases. It is preferable to form the elastic pieces 28, 28 so that the pieces 28, 28 return to their original shape by the elastic force in order to rotate the air turbine 46 efficiently.

Further, from the opening area of the intake port 34, the leak port
Although the opening area of 26 has been described as being large, the intake resistance from the leak port 26 to the intake port 34 may be reduced to increase the amount of intake air from the leak port 26.

Further, as shown in FIG. 6, at least one of the elastic pieces 28, 28 may be long like the seal lip and longer than the longitudinal dimension of the leak port 26. With this configuration, the negative pressure of the suction port 24 can be further increased, and the dust suction property can be further improved.

Next, another embodiment will be described with reference to FIG.

The embodiment shown in FIG. 7 is similar to that shown in FIGS.
The elastic pieces 28, 28 of the embodiment shown in FIG. 3 are provided by expanding the lower ends by inclining the opposite ends in the opposite direction so that the facing distance becomes wider toward the lower end side.

According to this structure, when the suction port main body 11 is placed on the floor surface and moved forward, the rear elastic piece 28 is inclined rearward in advance, so that the front elastic piece 28 is on the opposite side. It is elastically deformed so that it is folded back to a certain rear side, and the tip is pressed against the base end of the elastic piece 28 on the rear side, and the vicinity of the edge of the end is pressed against the protrusions 27 at both ends of the leak port 26. Flexible so that the leak port 26 is airtightly closed,
On the contrary, when retracted, the elastic piece 28 on the front side inclines forward in advance, so that the elastic piece 28 on the rear side is elastically deformed so as to be folded back to the front side, and the tip end is the base end of the elastic piece 28 on the front side. The leak port 26 is air-tightly closed by being pressed by the portion and being flexible so that the vicinity of the edge of the end is pressed by the projections 27 at both ends of the leak port 26. Therefore, when reversing the running direction of the suction port main body 11, one elastic piece
Since 28 is elastically deformed so as to return to the almost original shape and the other is inverted, the force for elastically deforming the elastic pieces 28, 28 is smaller than the force of the embodiment shown in FIGS. The running resistance of 11 and the resistance when switching the running direction can be reduced, and the running performance can be improved.

Next, still another embodiment will be described with reference to FIG.

The embodiment shown in FIG. 8 is similar to that shown in FIGS.
The pair of elastic pieces 28, 28 of the embodiment shown in FIG. 9 is provided with the raised hair 70 on the surface opposite to the leak port 26 side which is the surface opposite to the facing direction.

According to this structure, when the suction port main body 11 is placed on the floor surface and is run, the elastic pieces 28, 28 are elastically deformed and face the floor surface of the elastic piece 28 located on the lower side. The surface to be brushed 70
Since it is a surface provided with, by the raised 70 provided on the surface that rubs against the floor surface during traveling, it is possible to reduce the friction resistance between the floor surface and the elastic piece 28, it is possible to reduce the running resistance of the suction port main body 11, The running performance can be improved.

[0047]

According to the suction port body for electric cleaning according to the first aspect of the present invention, a leak port is formed on the downstream side of the suction air stream that rotates the air turbine, and a pair of elastic pieces are provided at the front and rear edges of the leak port. Since it is provided, when traveling on the surface to be cleaned, the pair of elastic pieces elastically deforms in the direction opposite to the traveling direction and closes the leak port, and the intake turbine from the intake port efficiently rotates and rotates the air turbine. The cleaning body can be rotated, and when lifted from the surface to be cleaned, the elastic piece returns to the original state in which it protrudes downward, the leak port opens, the air is sucked from the leak port, and the intake from the intake port is reduced. Rotation of the rotary cleaning body can be reduced.

According to the suction port body of the vacuum cleaner of the second aspect, in addition to the suction port body of the vacuum cleaner of the first aspect, the suction port body is provided near the base end of the elastic piece on the side opposite to the edge of the leak port. Since the protrusion is formed along the edge of the leak port, the base end of the elastic piece that deforms so as to face the lower surface of the case body on the side opposite to the running direction when placed on the surface to be cleaned and run. Part and the tip of the elastic piece that closes the leak port and the tip is located at the base end of the other elastic piece is sandwiched between the surface to be cleaned and the protrusion, and the leak port can be reliably closed. , The air turbine can be reliably sucked from the intake port and the air turbine can be efficiently rotated by the suction air flow.

According to the suction port body of the vacuum cleaner of claim 3, in addition to the suction port body of the vacuum cleaner of claim 1 or 2, the lower ends of the pair of elastic pieces are inclined to the opposite side to the facing direction. Since it is provided in such a way that when one is placed on the surface to be cleaned and is run, one elastic piece has a shape that is inclined in the direction in which it is elastically deformed, the other elastic piece is on the side opposite to the running direction. When elastically deformed and the elastic deformation direction of the elastic piece is switched by switching the traveling direction, only one elastic piece elastically deforms, so the traveling direction can be switched smoothly, traveling resistance can be reduced, and traveling performance is improved. it can.

According to the suction port body of the vacuum cleaner of claim 4, in addition to the suction port body of the vacuum cleaner of any one of claims 1 to 3, the surface of the pair of elastic pieces opposite to the facing direction. Since the bristles are provided on the side, when the elastic piece is placed on the surface to be cleaned and run to elastically deform the elastic piece in the opposite direction to the running direction, Since the surface provided with the raised hair faces the surface to be cleaned, the raised hair can reduce the frictional resistance with the surface to be cleaned and improve the running property.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a suction port body of an electric vacuum cleaner according to the present invention.

FIG. 2 is a top perspective view of the same.

FIG. 3 is a bottom perspective view of the same.

FIG. 4 is an explanatory view showing a forward movement state of the suction inlet main body.

FIG. 5 is an explanatory diagram showing a retracted state of the suction port body.

FIG. 6 is a bottom perspective view showing another embodiment of the suction port body of the electric vacuum cleaner of the present invention.

FIG. 7 is a sectional view showing still another embodiment of the suction port body of the electric vacuum cleaner of the present invention.

FIG. 8 is a sectional view showing still another embodiment of the suction port body of the electric vacuum cleaner of the present invention.

[Explanation of symbols]

 11 Suction port main body 15 Case body 24 Suction port 26 Leak port 27 Protrusion 28 Elastic piece 34 Intake port 38 Communication pipe 46 Air turbine 61 Rotating blade as a rotary cleaning body 70 Brushed

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshinobu Hidaka 43 Horiyamashita, Hadano City, Kanagawa Prefecture Tec Hadano Factory

Claims (4)

[Claims] 1. A case body having a suction port opened on a lower surface facing a surface to be cleaned and having an intake port located above the suction port, and the suction port and the suction port provided on the case body. A communication pipe that communicates with the rotary cleaning member that is rotatably disposed in the case body so as to face the suction port; and a suction airflow that is located in the case body between the intake port and the communication pipe. An air turbine rotatably arranged to drive the rotary cleaning body to rotate, a leak port formed on the lower surface of the case body so as to communicate between the air turbine and the communication pipe, and the leak port The case body is provided with a pair of elastic pieces projecting downward in the vicinity of both edges facing each other in the traveling direction and closing the leak port when the case body is flexed against elasticity. Vacuum cleaner Suction port body. 2. The lower surface of the case body is provided with a protrusion located near the base end of the elastic piece and located on the side opposite to the edge of the leak port and protruding downward along the edge of the leak port. The suction port body of the vacuum cleaner according to claim 1. 3. The suction port body of the electric vacuum cleaner according to claim 1, wherein the pair of elastic pieces are provided so that their lower ends are widened toward the opposite side and inclined. 4. The suction port body of the electric vacuum cleaner according to claim 1, wherein the pair of elastic pieces have a raised surface on a surface opposite to the facing direction.