JP3323999B2 - 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 a vacuum cleaner having a floor brush provided with a suction port on a lower surface and a spatula mounted on an opening provided on a front surface.

[0002]

2. Description of the Related Art FIG. 18 is a perspective view showing the overall structure of a vacuum cleaner. In the drawing, reference numeral 1 denotes a vacuum cleaner body having a built-in electric blower, 2 denotes a power cord, 3 denotes a hose made of an elastic material such as rubber, 4 denotes a hand pipe, 5 denotes an operation unit provided on the hand pipe 4, and 6 denotes an extension. The pipe 7 is a floor brush.

Next, the operation of the above-described vacuum cleaner will be described. After the power cord 2 is connected to the power source, the user holds the pipe 4 at hand, operates the operation unit 5 to drive the electric blower in the cleaner body 1, and removes the floor brush 7 fitted to the end of the extension pipe 6. If the user slides along the floor, dust on the floor is sucked into the cleaner main body 1 together with air through the floor brush 7, the extension pipe 6, the hand pipe 4, and the hose 3, and the cleaner main body 1 It is designed to be collected by a paper bag-shaped dust collection filter installed inside of the device.

FIG. 19 is a perspective view of the floor brush 7, in which an elbow 10 is provided at the rear central portion so as to be vertically movable and is connected to the extension pipe 6 via the elbow 10. At this time, as the elbow 10 moves up and down, the inclination angle of the floor brush 7 with respect to the extension pipe 6 freely changes, so that the lower surface of the floor brush 7 easily adheres to the floor surface.

FIG. 20 is a bottom view of the inside of the floor brush 7, and a part thereof is shown in a sectional view. As shown in the figure, the elbow 10 has a hollow rotary shaft 10e inserted into a frame provided in the case 8 at the rear central portion of the floor brush 7 and is connected to the case 8 so as to be vertically movable. Reference numeral 10a denotes a cylindrical portion of the elbow 10, 10b denotes an expanded tube portion which is fitted to and integrated with the elbow 10, and 10c denotes a fitting portion connected to the extension pipe 6.

Reference numeral 12 denotes a rotary brush rotatably disposed in the suction port 11, reference numeral 20 denotes a belt, reference numeral 21 denotes an electric motor, and the rotation of the electric motor 21 is transmitted to the rotary brush 12 by the belt 20. Reference numeral 22 denotes a control device for the electric motor 21, and reference numeral 23 denotes a power supply intake unit that supplies power to the control device 22. The rotary brush 12 is provided with a flocked brush in which a plurality of synthetic resin bristle bundles 14 arranged and fixed in a row on a shaft 13 are arranged in a plurality of rows, and bearing parts provided at both ends are provided. 16a and 16b are rotatably held by holding portions 18a and 18b provided on the case 8.

Next, this operation will be described. When the lower surface of the floor brush 7 is brought into close contact with the floor surface, the operation unit 5 is operated, the vacuum cleaner main body 1 is operated to perform dust absorption, and when it comes to a place where a carpet or the like is laid on the floor surface, furthermore, A signal is sent from the operation unit 5 to the control device 22 through the power supply intake unit 23, the electric motor 21 is driven, the rotation is transmitted to the rotary brush 12 via the belt 20, and the rotation is performed. In this way, the cleaning of carpets and the like is also effective.

In the above-described floor brush 7 of the conventional vacuum cleaner, when the floor brush 7 is operated to clean the floor, the floor brush 7 is pressed when pressed.
There was a problem that the movement became heavy. Such a problem is particularly problematic in the case of a carpet having a long hair.

The inventors of the present invention, as shown in FIG. 21, have a wheel 25a having a diameter larger than the diameter of the shaft 13 at both ends of the shaft 13 of the rotary brush 12a and having an uneven portion on the outer periphery. 25b, the bearings 16a, 17 of the rotary brush 12a are rotatably held by holding portions 18a, 19a, 19b, and a driving force is obtained when cleaning a carpet or the like, and an operating force required for moving the floor brush 7 is obtained. The present invention has been completed, and a patent application has been filed as Japanese Patent Application No. 4-99617. In FIG. 21, reference numeral 14a denotes a blade made of an elastic material such as rubber mounted on the shaft 13 instead of the flocking brush.

FIG. 22 shows a floor brush 7 without a rotary brush.
8 is a case, 9 is a cover, 10 is an elbow,
11 is a suction port. 26a, 26b are rear wheels provided on both sides of the elbow 10 at the rear of the lower surface, 27a, 27b
Numerals are front wheels provided on both sides of the suction port 11 at the lower front portion. The vacuum cleaner provided with the floor brush 7 as described above uses the rear brush 26a, 26b and the front wheels 27a, 27b.
Is rolled to move on the floor surface, and dust and the like are sucked to perform cleaning.

FIG. 24 is a perspective view of a floor brush, 8 is a case, and 10 is an elbow. When cleaning a carpet or the like with the floor brush 7, the air suction force is softened and the floor brush 7
An opening 8a is provided on the front surface of the case 8 so that dust and the like can be sucked from the front surface of the case 8. The opening 8a is made of an elastic material such as rubber or embossed material. There is one in which a spatula 30 provided alternately with 32 is attached. The lower end of the hanging portion 31 is slightly (for example, about 1 mm) above the lower surface of the floor brush 7.
In such a floor brush 7, dust and the like on the lower surface of the floor brush 7 are sucked from the suction port, and dust and the like on the front surface of the floor brush 7 are sucked from the cut portion of the spatula 30.

FIG. 25 is an enlarged front view of the hand pipe 4 shown in FIG. 18, wherein 41 is a connecting portion of the hose 3, 42 is a connecting portion of the extension pipe 6, and 43 is a grip portion. Although not shown, the operation unit 5 is provided near the grip unit 43. In the vacuum cleaner provided with the above-described hand pipe 4, as shown in FIG. 18, the operating portion 5 is operated by holding the grip portion 43 with one hand, and the floor brush 7 is moved to clean the floor surface or the like. Perform

As shown in FIG. 20, the rotary brush provided on the floor brush 7 includes a flocking brush 14 and a blade 1.
21 and wheels 25a, 25b on both sides of the flocking brush 14 and the blade 14a, as shown in FIG.
The two have different structures of the bearing portions 16a, 16b or 16a, 17. For this reason, the structures and positions of the holding portions 18a, 18b or 18a, 19a, 19b for holding these bearing portions 16a, 16b or 16a, 17 are also different, so that the holding portions 18a, 18b or 18a adapted to the respective bearing structures. , 19a, and 19b, and a mold for the case 8 is also separately manufactured.

Also, the floor brush 7 shown in FIG.
When the carpet 28 is cleaned by moving the carpet 28 in the direction of the arrow as shown in FIG. 7, the carpet or the like stands in front of the rear wheels 26a and 26b, and the rear wheels 26a and 26b push down the carpet. While moving.

The hand pipe 4 and the extension pipe 6 connected to the hand pipe shown in FIG. 25 include a floor brush 7 without a rotary brush and a floor brush with a rotary brush 12. It may rotate if it becomes necessary. However, since the latter connects a conductive wire connecting the operation part 5 of the hand pipe 4 and the power supply part of the floor brush 7, it is necessary to prevent rotation in addition to not being pulled out. Yes, the structure is different, and the hand pipe 4 is manufactured separately.

[0016]

By the way, in the floor brush 7 provided with the spatula 30 shown in FIG. 24, in order to prevent the degree of vacuum of the suction port from being lowered, the cutout portion 32 is enlarged or its number is increased. There are limits. Therefore, dust and the like on the front surface of the floor brush 7 cannot be efficiently sucked, and when the floor brush 7 is moved,
There is a problem that the hanging portion 31 of the spatula 30 gets caught in a carpet or the like and becomes heavy.

The present invention has been made to solve the above problems, and has as its object to obtain a vacuum cleaner having excellent suction performance.

[0018]

A vacuum cleaner according to the present invention comprises a spatula disposed on the front surface of a floor brush, in which strip-shaped members made of an elastic material are alternately arranged and the side ends thereof are overlapped. It was done.

Further, the spatula arranged on the front surface of the floor brush is alternately formed in a trapezoidal cross section formed by forming an eight-letter slit in a plane at predetermined intervals in the vertical direction of a long elastic member. It is composed of an elastic piece and an elastic piece having an inverted trapezoidal cross section.

Further, the elastic piece having an inverted trapezoidal cross section is formed thinner than the elastic piece having a trapezoidal cross section.

[0021]

[Function] A spatula arranged in front of a floor brush is arranged alternately with strip-shaped elastic members alternately and side-by-side, and arranged at the front and back, or at predetermined intervals in the vertical direction of a long elastic member. It is composed of an elastic piece having a trapezoidal cross section and an elastic piece having an inverted trapezoidal cross section which are alternately formed by providing an eight-shaped slit when viewed in a plane, or this elastic piece having an inverted trapezoidal cross section has a trapezoidal cross section. By making it thinner than the elastic piece, the suction performance of dust and the like on the front surface of the floor brush can be improved, and the degree of vacuum of the suction port and the suction performance of dust and the like on the front surface of the floor brush can be balanced.

[0022]

FIG. 1 is a bottom view showing a rotary brush mounting portion of a floor brush of a vacuum cleaner according to a first embodiment of the present invention, FIG. 2 is an explanatory view of the operation of the rotary brush, and FIG. FIG. 4 is a bottom view showing the whole of the floor brush, FIG. 5 is an operation explanatory view of a convex portion provided on the rear lower surface of the floor brush, and FIG. 6 is a front view of the floor brush. FIG. 7 is a perspective view for explaining the basic principle of a spatula to be attached to the opening.
8 is an enlarged perspective view of a main part of the spatula of FIG. 6, FIG. 8 is an enlarged perspective view of a main part of the spatula of the present invention and its AA sectional view, and FIG. 9 is an operation explanatory view of the spatula of FIG. 8 and its BB sectional view. FIG. 10, FIG. 10 is a front view showing the hand pipe, FIGS. 11 and 12 are explanatory views of the operation of the hand pipe, FIG. 13 is a cross-sectional view and a side view showing a connecting portion between the hand pipe and the extension pipe, and FIG. FIG. 15 is a cross-sectional view showing an example in which the connecting portion of FIG. 13 is applied to a connecting portion between a hand pipe and an extension pipe of a floor brush having a rotary brush. FIG. 15 extends the connecting portion of FIG. 13 to a hand pipe of a floor brush without a rotary brush. It is sectional drawing which shows the example of application to the connection part of a pipe.

1 and 2, 7 is a floor brush, 8
Denotes a case, and 11 denotes a suction port. 12 and 12a are rotary brushes, 13 is a shaft, 14a is a blade attached to the shaft 13, and 15 is a pulley integrally formed with the shaft 13 and around which a belt 20 is hung. 16a and 16b are bearings provided at both ends of the shaft 13, and 17 is wheels 25a and 25.
b is a cross-shaped bearing portion (see FIG. 3) provided on one side of the shaft body 13 of the rotary brush 12 a having the shape b.

18a and 18b are holding portions provided on the side wall of the case 8 for holding the bearing portions 16a and 16b of the rotary brush 12 without wheels, and 19a and 19b are wheels 25.
a holding portion provided on the top plate of the case 8 for holding one of the bearing portions 17 of the rotary brush 12a having a and 25b. The other bearing 16a of the rotary brush 12a uses a holding part 18a. Here, the holding unit 1
9a, 19b and the rotary brushes 12, 12a.
Is selected as W> d. In addition,
The holding portions 18a and 18b may be provided on the top plate of the cover 8 near the side wall.

Therefore, the rotary brush 1 without wheels
In order to assemble the casing 2 into the case 8, as shown in FIG. 1, a shaft 13 having a blade 14a is arranged in the suction port 11, a belt 20 is hung on a pulley 15, and bearings 16a provided on both ends are provided. , 16b into the holding parts 18a, 18b,
Hold rotatably. In addition, in order to incorporate the rotary brush 12a having the wheels 25a and 25b into the case 8, as shown in FIG.
A belt 20 is hung on the pulley 15 and arranged in the suction port 11, a bearing 16a provided at one end is fitted into the holding portion 18a, and a bearing 17 provided at the other end is fitted into the holding portions 19a, 1a.
9b and held rotatably.

As described above, the holding portions 18a and 18b for holding the bearing portions 16a and 16b of the rotary brush 12 without wheels are provided on or near the side wall of the case 8 of the floor brush 7, and the top plate of the case 8 is provided on the top plate of the case 8. Of the rotary brush 12a having the wheels 25a and 25b on the pulley 15 side
7 are provided, one of the holding portions 18a is also used, and the other of the holding portions 18b or 19a,
When the bearing portions 16b or 17 are held by the 19b, respectively, both the rotary brushes 12 and 12a can be arbitrarily mounted on the same case 8 regardless of the presence or absence of the wheels 25a and 25b.

In FIG. 3, reference numeral 12a is a rotary brush, 13 is a shaft, 14a is a blade which is loosely attached spirally over substantially the entire length of the shaft 13, 15 is a pulley, 16a is one bearing, Reference numeral 17 denotes the other cross-shaped bearing portion, and reference numerals 25a and 25b denote wheels provided integrally with the shaft 13 on both sides of the blade 14a.

The floor brush 7 has a generally flat shape, and if the height is restricted, the bearing 1
The vertical dimension a of 7 must also be adjusted to the height of the floor brush 7. In this case, as described in the first embodiment, the distance W> W between the interval W between the holding portions 19a and 19b of the bearing portion 17 and the diameter d of the shaft 13 of the rotary brush 12a.
Since there is a relationship d, the left and right length b of the bearing portion 17 is set to a length suitable for this, and the vertical length a is shortened in accordance with the height of the floor brush 7, so that the left and right and upper and lower sides are asymmetric. Must be configured.

However, in accordance with the above conditions, it is difficult to visually discriminate just by making the vertical length a of the bearing portion 17 slightly shorter than the horizontal length b, and it is difficult to assemble the rotor brush 12a. In some cases, the bearing portion 17 may be mounted on the case 8 with the left-right direction up and down. For this reason, not only can the bearing portion 17 not be held by the holding portions 19a and 19b, but also the upper and lower heights are higher than the case 8, so that the cover 9 cannot be attached.

Therefore, the height a of the bearing 17 in the up-down direction is made 10% or more shorter than the length b in the left-right direction, so that the up-down and left-right can be easily discriminated visually. Prevents incorrect assembly.

In FIG. 4, 7 is a floor brush without a rotary brush, 8 is its case, 9 is a cover, 10 is an elbow, and 11 is a suction port. 26a and 26b are elbows 10
The rear wheels 27a and 27b are front wheels provided on both sides of the suction port 11 so that the outer periphery thereof is below the lower surface of the floor brush 7 by h (see FIG. 5). .

Reference numeral 9a denotes a protrusion protruding from the cover 9 on the front side of the rear wheels 26a, 26b and close to the rear wheels 26a, 26b, and has a protruding height h1 as shown in FIG. Is lower than the height h from the lower surface of the rear wheel to the outer peripheral portions of the rear wheels 26a and 26b, and h> h1 is selected.

Therefore, as shown in FIG.
When the floor brush 7 is moved in the direction of the arrow for cleaning 8,
First, the convex portion 9a pushes down the bristle feet of the carpet or the like 28, and the rear wheels 26a and 26b pass over it, so that the floor brush 7 can be moved smoothly with a small force.

6 and 7, reference numeral 7 denotes a floor brush, 8
Denotes a case, 8a denotes an opening provided on the front surface of the case 8, 10
Is an elbow. Numeral 30 is made of an elastic material such as rubber or embi, and is attached to the opening 8a provided on the front surface of the case 8 so that its lower end is at the same position as the lower surface of the floor brush 7 or slightly above it. With a spatula, a plurality of hanging portions 31 and cutout portions 32 are provided alternately at predetermined intervals. Reference numeral 33 denotes a slit provided substantially at the center in the width direction of each hanging portion 31 and extending upward from the lower end.

Therefore, when the floor surface or the like is cleaned by the floor brush 7, dust and the like on the front surface of the floor brush 7 are sucked from the cutout portion 32, and the hanging portion 31 is also flexible by the slit 33. To bend inward to suck dust and the like on the front surface. In this manner, if the hanging portion 31 of the spatula 30 is provided with the slit 33 so as to be flexible, the dust and the like on the front surface of the spatula 30 can be efficiently sucked without affecting the degree of vacuum of the floor brush 7.

FIG. 8 shows a spatula according to the present invention. Reference numeral 30 denotes a spatula attached to an opening 8a provided on the front surface of the floor brush 7, and in this embodiment, a strip made of rubber, embi or the like. The plurality of elastic members 34 and 35 are
The front and rear side edges are alternately arranged so as to form an armored door.

In this embodiment as described above, when the suction starts, the inner elastic member 35 is sucked and bent inward as shown in FIG. 34 is hard to bend, and is kept almost as it is. As a result, it is possible to prevent the degree of vacuum of the suction unit from lowering, and to balance the degree of vacuum with the suction performance of the dust 36.

In FIG. 10, reference numeral 4 denotes a hand pipe;
Is a connecting portion of the hose 3, 42 is a connecting portion of the extension pipe 6, 4
Reference numeral 3 denotes a loop-shaped grip. In addition, the hand pipe 4
It is constituted by integrally connecting a main body A formed by processing a synthetic resin, a hose connecting portion B, and a cover portion C. On the upper surface of the main body A, various switches and the like constituting the operation unit 5 provided on the cover C are provided. When the floor brush 7 has the rotary brush 12, the operation unit 5
And a conductive wire passage which continues the floor brush 7.

As a result of various experiments conducted on the operability of the floor brush 7, a line 0 passing through the center of the connecting portion 41 of the hose 3 was obtained.
The angle θ between 1-01 and the cutting line 02-02 of the mating line 44 between the main body A of the grip 43 and the cover C is 0 to 1.
0 ° range, ie, lines 01-01 and 02
It has been found that the operability is better when -02 is parallel or as close to parallel as possible.

From the results of this experiment, it can be seen that when the bottom surface of the floor brush 7 is in contact with the floor surface almost in parallel, the aforementioned O2-
It became clear that the operability was better as the O2 line was substantially parallel to the floor surface and the rearward extension of the hose 3 connected to the connecting portion 41 from the connecting portion 41 was smaller. However, in order to improve the operability, as shown in FIG. 11, when the O2 -O2 line is made to be almost parallel, when the angle .theta. Is large, the connecting portion 41 is inclined obliquely upward and the hose 3 is turned upward. Of the hose 3 becomes large, a large force is required to support the weight of the hose 3, and the operability is reduced.

In order to reduce the overhang of the hose 3 from the connecting portion 41 to the rear and reduce the force for supporting the weight of the hose 3, the O1-O1 line is made parallel and the grip portion 43 is provided. If it is large, as shown in FIG. 12, the inclination with respect to the floor surface becomes large, so that the floor brush 7 does not adhere securely to the floor surface, so that the suction performance is reduced, and the grip portion is held in a state where the thumb side is up. As a result, the hand is strained and fatigue is great.

From the above, by making the O1-O1 line and the O2-O2 line as parallel as possible, and setting the angle θ formed between them in the range of 0 to 10 °,
The operability of the floor brush 7 can be improved. That is, it is possible to obtain a hand-held pipe which does not come off during cleaning, can secure strength, is durable, easy to use, and excellent in operability.

The joint 45 of the main body A, the hose connecting portion B and the cover portion C is connected to the connecting portion 42 of the extension pipe 6.
, The structure of the mold can be simplified, manufacturing costs can be reduced, and parts can be easily attached.

In FIG. 13, reference numeral 46 denotes a connecting portion which forms a connecting portion 42 between the hand pipe 4 and the extension pipe 6, and the inner diameter thereof is reduced by a gentle inclined surface 47 from the opening to the back, and the length L When the hose connection 41
Communicate with 48 is a window hole provided in the connection portion 46, 49 is a vertical wall provided on both sides of the window hole 48, 50 is a stopper provided in an opening portion, and is provided with a connection terminal of a conductive wire. Reference numeral 51 denotes a conductive wire passage formed between the peripheral wall of the connecting portion 46 and the cover C.

FIG. 14 shows an example in which the connecting portion shown in FIG. 13 is applied to a connecting portion between a hand pipe and an extension pipe of a floor brush having a rotary brush. A substantially central portion of a lever 53 integrally formed with the push button 52 is rotatably fixed to a vertical wall 49 by a cylindrical push button provided, and the push button 52 is provided in a window hole provided in the cover C. A part thereof projects outside from 55. Reference numeral 54 denotes a spring interposed between the push button 52 and the connecting portion 46, and biases the lever 53 to always rotate clockwise. The push button 52 is attached only to the hand pipe 4 for a floor brush having a rotary brush.

Reference numeral 6 denotes an extension pipe having an outer diameter substantially equal to the outer diameter of the connecting portion 46 of the hand pipe 4, and a stopper 56 having a connection terminal facing the stopper 50 of the hand pipe 4 is provided at a position L1 from the tip. The stopper 56
From the end to the tip, a connecting portion 57 is formed on an inclined surface 58 corresponding to the inclined surface 47 of the connecting portion 46 of the hand pipe 4, and is gradually reduced in diameter. Reference numeral 59 denotes a locking portion formed near the distal end of the connecting portion 57, and the distal end of the lever 53 provided on the push button 52 of the hand pipe 4 is locked. Reference numeral 60 denotes a cover for forming a conductive wire passage 51a.

The extension pipe 6 as described above is connected to the hand pipe 4
In order to connect the extension pipe 6, the connection portion 57 of the extension pipe 6 is inserted into the connection portion 46 of the hand pipe 4 and pushed. When it is further pushed in, the front end pushes up the lever 53 of the push button 52 and moves forward, and the stopper 56 hits the stopper 50 of the hand pipe 4 to connect the conductive wire and stop. At this time, the distal end of the lever 53 of the push button 52 is locked by the locking portion 59 of the extension pipe 6. As a result, the hand pipe 4 and the extension pipe 6 are locked, and escape and rotation are prevented. When removing the extension pipe 6 from the hand pipe 4, the push button 52 is pressed down, the lever 53 is rotated counterclockwise to release the engagement with the locking portion 59, and the extension pipe 6 may be pulled out.

FIG. 15 shows the connection portion of FIG. 13 applied to the connection portion between the hand pipe and the extension pipe of the floor brush without a rotary brush. Reference numeral 6 denotes an inner diameter of the opening of the connection portion 46 of the hand pipe 4. An extension pipe having the same outer diameter, and the inclined surface 47 of the connecting portion 46 of the hand pipe 4 extending from the tip to the position of L2.
The connecting portion 61 is formed on an inclined surface 62 whose diameter is sequentially reduced in correspondence with the above. Reference numeral 63 denotes a sealing material that closes the window hole 48 in order to prevent air and dust from entering. Although the cover C having no window hole 55 is used, the cover C having the window hole 55 as shown in FIG. 14 may be used, and the window hole 55 may be closed with a sealing material.

The extension pipe 6 is connected to the hand pipe 4 as described above.
Can be connected by inserting the distal end of the extension pipe 6 into the opening of the connecting portion 46 of the hand pipe 4 and pushing it in while rotating. When the distal end of the extension pipe 6 hits the rear end of the connecting portion 46 of the hand pipe 4, the extension pipe 6 stops and is connected and held at that position. When removing the extension pipe 6, the extension pipe 6 may be pulled out while rotating.

With this configuration, the extension pipe 6 of the floor brush having the rotor brush and the extension pipe 6 of the floor brush without the rotary brush can be connected to one type of the hand pipe 4. And the inventory management can be simplified.

Embodiment 2 FIG. 16 is a perspective view of a main part of a spatula according to a second embodiment of the present invention and a bottom view thereof. Spatula 3 of the present embodiment
Numeral 0 designates a slit 38 which is made of rubber, embi, or the like, and which has a predetermined width and which is inclined in an eight-shape when viewed from above, in an elastic member 37 which is large enough to close the opening 8a on the front surface of the floor brush 7, and has a trapezoidal cross section. The elastic pieces 39 and the elastic pieces 40 having an inverted trapezoidal cross section are alternately formed.

In the spatula 30 configured as described above, when suction is started, the elastic piece 4 having an inverted trapezoidal cross section is formed.
0 is sucked and bent inward to suck dust and the like on the front surface, but the elastic piece 39 having a trapezoidal cross section is hard to bend, so that it remains almost as it is. As a result, it is possible to prevent the degree of vacuum of the suction unit from lowering, and to balance the degree of vacuum with the suction performance of dust and the like.

Third Embodiment FIG. 17 is a perspective view of a main part of a spatula according to a third embodiment of the present invention and a bottom view thereof. Spatula 3 of the present embodiment
0 is substantially the same as that of the second embodiment, except that the thickness of the elastic piece 40a having an inverted trapezoidal cross section is formed to be smaller than the thickness of the elastic piece 39 having a trapezoidal cross section, and the bending due to suction is increased to increase the dust. And so on, with improved suction performance.

[0054]

As is apparent from the above description, according to the present invention, the spatula disposed on the front surface of the floor brush is disposed alternately in the form of strip-shaped elastic members and the front and rear sides of the spatula are overlapped. From the elastic piece having a trapezoidal cross section and an elastic piece having an inverted trapezoidal cross section which are alternately formed by providing an eight-letter slit as viewed in plan at predetermined intervals in the vertical direction of a long elastic member. Since the elastic piece having the inverted trapezoidal cross section is formed thinner than the elastic piece having the inverted trapezoidal cross section, the suction performance of dust or the like on the front surface can be improved without lowering the degree of vacuum of the floor brush, and The degree of vacuum at the suction port and the suction performance of dust and the like on the front surface of the floor brush can be balanced.

[Brief description of the drawings]

FIG. 1 is a bottom view showing a rotary brush mounting portion of a floor brush of a vacuum cleaner according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating the operation of the rotary brush according to the first embodiment.

FIG. 3 is a front view and a side view of the rotary brush according to the first embodiment.

FIG. 4 is a bottom view showing the entire floor brush of the first embodiment.

FIG. 5 is an operation explanatory view of a projection provided on the lower rear surface of the floor brush of the first embodiment.

FIG. 6 is a perspective view for explaining the basic principle of a spatula attached to the front opening of the floor brush of the first embodiment.

FIG. 7 is an enlarged perspective view of a main part of the spatula of FIG. 6;

FIG. 8 is a perspective view of a main part of the spatula according to the first embodiment and a sectional view taken along line AA of FIG.

FIG. 9 is an explanatory view of the operation of the spatula of FIG. 8 and its BB.
It is sectional drawing.

FIG. 10 is a front view showing a hand pipe of the first embodiment.

FIG. 11 is an explanatory diagram of the operation of the hand pipe of the first embodiment.

FIG. 12 is a diagram illustrating the operation of the hand pipe of the first embodiment.

FIG. 13 is a cross-sectional view and a side view showing a connecting portion between the hand pipe and the extension pipe according to the first embodiment.

14 is a cross-sectional view showing an example in which the connecting portion of FIG. 13 is applied to a connecting portion of a hand brush and an extension pipe of a floor brush having a rotary brush.

15 is a cross-sectional view showing an example in which the connecting portion of FIG. 13 is applied to a connecting portion between a hand pipe and an extension pipe of a floor brush without a rotary brush.

FIG. 16 is a perspective view and a sectional view of a main part of a spatula of a vacuum cleaner according to a second embodiment of the present invention.

FIG. 17 is a perspective view and a sectional view of a main part of a spatula of a vacuum cleaner according to a third embodiment of the present invention.

FIG. 18 is a perspective view showing the overall configuration of a conventional vacuum cleaner.

FIG. 19 is a perspective view of the floor brush of FIG. 18;

FIG. 20 is a bottom view of FIG. 19;

FIG. 21 is a bottom view of a floor bush provided with a conventional rotary brush having wheels.

FIG. 22 is a bottom view of another conventional floor brush.

FIG. 23 is an operation explanatory view of the floor brush of FIG. 22;

FIG. 24 is a perspective view of still another conventional floor brush.

FIG. 25 is a front view of a conventional hand pipe.

[Explanation of symbols]

 Reference Signs List 11 suction port 8a opening 30 spatula 7 floor brush 34, 35 strip-shaped elastic material 37 long elastic member 38 octagonal slit 39 elastic piece with trapezoidal cross section 40 elastic piece with inverted trapezoidal cross section 40a inverted trapezoidal cross section Elastic piece

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takehiro Yamaguchi 1728 Koeda, Hanazono-cho, Osato-gun, Saitama 1 Mitsubishi Electric Home Equipment Co., Ltd. Inside Mitsubishi Electric Home Equipment Co., Ltd. (72) Inventor Tomohisa Imai 1728 Koeda, Oaza, Hanazono-cho, Osato-gun, Saitama 1 1 Inside Mitsubishi Electric Home Equipment Co., Ltd. 1 Mitsubishi Electric Home Appliances Co., Ltd. (56) References REALS: Sho 49-134659 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 9/04 A47L 9/24

Claims (3)

(57) [Claims] An inlet provided on a lower surface and an opening provided on a front surface.
Electricity with floor brush with spatula on mouth
In the vacuum cleaner, the spatula is alternated with strip-shaped members made of an elastic material.
An electric vacuum cleaner characterized by being constructed by overlapping side end portions in front and back . 2. An air inlet provided on a lower surface and an opening provided on a front surface.
Electricity with floor brush with spatula on mouth
In the vacuum cleaner, the spatula is moved in a predetermined direction in a vertical direction of a long elastic member.
By providing slits in the shape of an eight character when viewed two-dimensionally at intervals,
Elastic pieces with trapezoidal cross-section and bullets with inverted trapezoidal cross-section
An electric vacuum cleaner comprising a sex piece . 3. The vacuum cleaner according to claim 2 , wherein the elastic piece having an inverted trapezoidal cross section is formed thinner than the elastic piece having a trapezoidal cross section.