JPH08173355A - Suction opening body for vacuum cleaner - Google Patents

Abstract

PURPOSE: To prevent a rotational vibration by balancing between a blade portion and a brush portion which have mutually different weights in such a manner that a brush retaining portion, which is fit into a groove of a shaft member rotatably supported near a suction opening of a case body, is provided near the base end of the light brush portion. CONSTITUTION: In a suction opening main body in which a rotation cleaning body 30 rotated by the drive of a driving means is provided near the suction opening, a pair of grooves 31 is formed in a spiral shape on the outer peripheral face of a cylindrical shaft member 32. A blade retaining portion 36b which is formed by expanding one side of a band-shaped brake 36a is fit into one of the groves 31 in order to fix a blade 36. A brush retaining portion 37b, in which brush hair 37a is implanted in a band shape, is fit into the other groove 31 in order to fix a brush 37. The brush retaining portion 37b is formed in the same shape as that of the blade retaining portion 36b and is made of a synthetic resin having a specific gravity higher than that of the blade 36. Consequently, the center of gravity of the rotation cleaning body 30 is positioned on the rotation axis thereof.

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 which houses a rotary cleaning body which is rotationally driven by a driving means.

[0002]

2. Description of the Related Art Conventionally, as a rotary cleaning body housed in a suction port body of an electric vacuum cleaner of this type, for example, FIGS.
The configuration shown in 0 is known.

The suction port body of the electric vacuum cleaner shown in FIGS. 9 and 10 has a rectangular case body 51 in which a suction chamber 52 which is horizontally long in the front and rear direction, which is the traveling direction side, and a suction chamber 52 in the rear side. Chamber 52
An air passage chamber 53 communicating with the air passage chamber 53 is defined and formed, and an electric motor 55 for rotating the rotary cleaning body 54 is arranged at one end of the air passage chamber 53. A suction port 56 is formed on the lower surface of the suction port body 50 facing the floor so as to communicate with the suction chamber 52 accommodating the rotary cleaning member 54 and to project the lower end of the rotary cleaning member 54.

On the other hand, the rotary cleaning member 54 is a substantially cylindrical shaft member.
58 has a groove portion 59 in an axial spiral shape.
Further, a flexible strip-shaped blade portion 60 is formed by engaging one side in the longitudinal direction. Further, the rotary cleaning body 54 is integrally provided with a pulley 62 that bridges a belt 61 that transmits the drive of the electric motor 55 at one end of the shaft member 58 in the axial direction by bonding or the like, and is provided at both ends of the shaft member 58 in the axial direction. A bearing 64 that engages with a shaft support portion 63 provided opposite to the inside of the suction chamber 52 is rotatably provided, and a rotary cleaning body 54 is rotatably sucked by a rotational drive of an electric motor 55 so that a lower end thereof protrudes from a suction port 56. A suction port body is formed by being axially supported in the chamber 52.

However, in the suction port body of the conventional vacuum cleaner shown in FIGS. 9 and 10, the rotary cleaning body 54 is used.
Since the blade portion 60 is provided in the above, it is difficult to remove thread dust or the like entwined with the carpet, and noise is generated when the blade portion 60 abuts between the boards.

On the other hand, it is known that a brush section having brush bristles is provided in place of the blade section 60. In the case where this brush section is provided, thread dust removed from a carpet or the like is entangled in the brush section, The brush effect is reduced.

Therefore, a structure using a rotary cleaning body provided with both a brush portion and a blade portion is known.

[0008]

However, in the suction port body of the conventional vacuum cleaner having the rotary cleaning body provided with both the brush portion and the blade portion, the brush portion is softer than the material of the blade portion. Brush bristles made of a lightweight material are bunched and planted at a predetermined interval, so the weight is lighter than the strip-shaped blade part, so the weight balance is impaired and rotation blurring occurs when the rotary cleaning body rotates. Due to this rotation shake, there is a problem that dust cannot be scraped off substantially uniformly and efficiently at the blade portion and the brush portion, cleaning cannot be performed efficiently, and noise due to rotation shake occurs.

In view of the above problems, it is an object of the present invention to provide a suction port body for an electric vacuum cleaner that does not cause rotational runout of the rotary cleaning body.

[0010]

According to a first aspect of the present invention, there is provided a suction cleaner for a vacuum cleaner, comprising a case body having a suction opening on a lower surface thereof, and a rotary cleaning body which faces the suction means and is rotated by driving a driving means. In the suction port body provided, in the rotary cleaning body, a plurality of groove portions are provided along the axial direction, the shaft member is rotatably supported by the case body facing the suction port, and the one of the shaft members is provided. A belt-shaped blade portion which is engaged with the groove portion and is made of a soft member, a brush portion which is engaged with the other groove portion of the shaft member and has brush bristles, and a proximal end of the brush portion which is engaged with the groove portion It is equipped with a weight portion provided in the.

The suction port body of the electric vacuum cleaner according to claim 2 is
In a suction port body provided with a rotary cleaning body which faces the suction port and is rotated by the drive of a driving means, in a case body having a suction port opened on its lower surface, the rotary cleaning body is provided with a plurality of grooves along an axial direction. A shaft member rotatably supported by the case body so as to face the suction port, a belt-shaped blade part made of a soft member that is engaged with the one groove of the shaft member, and the other of the shaft members. A brush portion that is engaged with the groove portion and has brush bristles, and a length dimension of the brush portion protruding from the shaft member is longer than a length dimension of the blade portion.

[0012]

In the suction port body of the electric vacuum cleaner according to claim 1, since the weight portion is provided in the vicinity of the base end of the light weight brush portion that engages with the groove portion of the shaft member, the blade portion and the brush portion having different weights are provided. The balance of the weight is balanced and rotation blur is prevented.

The suction port body of the electric vacuum cleaner according to claim 2 is
Since the length dimension of the light-weight brush portion protruding from the shaft member is made longer than the length dimension of the blade portion, the weight balance between the blade portion and the brush portion can be achieved, and rotational shake can be prevented.

[0014]

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

In FIG. 4, 11 is a suction port main body which is horizontally long with respect to the traveling direction, and this suction port main body 11 is a lower main body case.
12 and an upper body case 13 coupled and fixed to the upper portion of the lower body case 12 are joined together by sandwiching a bumper 14 along the peripheral surface including the front surfaces of the upper and lower body cases 12 and 13 to form a rectangular shape. The case body 15 is formed.

Further, the lower main body case 12 has a rib portion 17 formed substantially vertically on the upper surface, a laterally long suction chamber 18 is formed in the front side which is the traveling direction side in a substantially left-right direction, and a rear side substantially The air passage chamber 19 that communicates with the suction chamber 18 in the center, and this air passage chamber
An electric motor chamber 20 located at one end of the air passage 19 and a control chamber 21 located at the other end of the air passage chamber 19 are defined. Further, the suction chamber 18 is provided on the lower surface of the suction inlet main body 11 facing the floor surface.
Is formed with an opening.

Further, at the center of the rear portion of the suction port body 11, a communication pipe 24 is attached by a rotation shaft 25 so as to be rotatable at a predetermined vertical angle. The front end of the communication pipe 24 is rotatably fitted inside the air passage chamber 19 and faces the substantially central portion of the suction chamber 18, and communicates with the suction chamber 18 through the air passage chamber 19. To do. On the other hand, the rear end of the communication pipe projects rearward outward from the suction port body 11, and the bent front end of the connecting pipe 26 is rotatably fitted to the rear end. This connection pipe 26 is detachably connected to the hose via an extension pipe (not shown),
Further, it is connected to a vacuum cleaner body (not shown). Then, the suction chamber 18 is communicated with the dust collection chamber of the electric vacuum cleaner body through the air passage chamber 19, the communication pipe 24, the connection pipe 26, an unillustrated extension pipe and a hose.

A rotary cleaning body 30 is provided in the suction chamber 18. The rotary cleaning body 30 is shown in FIGS.
As shown in FIG. 3, a cylindrical main body portion 32 as a shaft member formed with a pair of groove portions 31 having a substantially anchor-shaped cross section in a spiral shape on the outer peripheral surface is positioned in the diametrical direction. Shafts 33 are respectively projected at both ends of and are integrally formed by insert molding.

Further, on one end side of the main body 32 in the axial direction,
The pulley 34 is integrally formed during insert molding.

The groove portion 31 provided in the main body portion 32 gradually becomes shallower toward the pulley 34, which is one end side in the axial direction of the main body portion 32, and the diameter dimension in the cross section of the main body portion 32 is the diameter. It is formed in a tapered shape so as to be large, that is, provided with a slight draft taper for release after insert molding.

A flexible strip-shaped blade portion 36 is fixedly engaged with one of the groove portions 31 of the main body portion 32.
The blade portion 36 is composed of a strip-shaped blade 36a and a blade locking portion 36b which bulges in the thickness direction on one side along the longitudinal direction of the blade 36a.
36b is engaged and fixed in the groove portion 31 of the main body portion 32, and the blade portion
36 is attached to the main body 32 so as to project like a wall.

Further, a brush portion 37 is engaged and fixed to the other groove portion 31 of the main body portion 32. This brush portion 37 has the same shape as the blade locking portion 36b of the blade portion 36 and has the same blade portion.
A brush lock part 37b, which is a weight part made of synthetic resin of urethane type or vinyl chloride type, whose specific gravity is heavier than 36, and brush bristles 37a that are band-shaped on the brush lock part 37b. The brush engaging portion 37b is formed in substantially the same shape as the portion 36, and the brush engaging portion 37b is engaged and fixed in the groove portion 31 of the main body portion 32.
37 is attached to the main body 32 so as to project like a wall. In addition, in the brush locking portion 37b, the center of gravity of the rotary cleaning body 30 to which the blade portion 36 and the brush portion 37 are attached is the rotary cleaning body.
It is located on the rotation axis of 30 so that the weight is balanced, that is, the weight of the blade portion 36 and the weight of the brush portion 37 are substantially the same.

Further, in the rotary cleaning body 30, a bearing 38 is rotatably provided on a shaft 33 projecting at both ends in the longitudinal direction by a plurality of washers 38a, and the bearing 38 is attached to a shaft supporting portion 39 provided on the case body 15. The rotary cleaning body 30 is engaged with the case body 15 and is rotatably supported by the case body 15.

In the rotary cleaning body 30, the tips of the blade portion 36 and the brush portion 37 do not come into contact with a flat floor surface such as between boards, but contact with an elastically deformable floor surface such as a carpet or tatami mat. Further, the lower end portion of the rotary cleaning body 30 is provided so as to slightly project downward from the suction port 22.

Furthermore, on both sides of the front and rear of the suction port body 11,
The auxiliary wheels 40, 40 are rotatably supported so as to project from the lower surface of the lower main body case 12, and the suction port main body 11 is slidable on the floor surface by the auxiliary wheels 40, 40.

Further, it projects downward toward the floor from the lower part of the front surface of the suction port main body 11 to improve the airtightness of the suction chamber 18 and to lower the wall-like downward so as to improve the dust collecting property near the wall. A protruding sealing lip 41 is formed.

On the other hand, the electric motor chamber 20 is provided with an electric motor 43 as a drive means for rotating the rotary cleaning body 30.
Then, a belt 44 for power transmission is attached to a pulley 43a fixed to an output shaft (not shown) of an electric motor 43 as a driving unit and a pulley 34 integrally formed at one end of the rotary cleaning body 30,
The output from the electric motor 43 is passed through the belt 44 so that the rotary cleaning body 30 rotates in the reverse direction with respect to the traveling direction.

Further, the control room 21 is provided with control means 45 for converting a detection signal from a traveling direction detecting means (not shown) for detecting the traveling direction and controlling the driving of the electric motor 43.

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

First, the assembly of the rotary cleaning body 30 will be described. By insert molding, the shaft 33 is projected at both ends in the longitudinal direction, the pulley 34 is formed on one end side, and the groove portion 31 is provided in a spiral shape on the outer peripheral surface. Main body
32 is integrally formed. When the main body 32 is released, it is removed from the pulley 34 side by the removal taper of the groove 31.
Release so that it can be pulled out along the axial direction of. After that, the blade engaging portion 36b of the blade portion 36 and the brush engaging portion 37b of the brush portion 37 are inserted from the end portion on the side where the pulley 34 is not provided in the groove portion 31, respectively, and the blade portion 36 and the brush portion 37 are inserted. It is slid along the axial direction of the main body 32 until it comes into contact with the end face of the pulley 34, and is inserted and fixed. further,
A bearing 38 is rotatably provided on the shaft 33 to assemble and form the rotary cleaning body 30.

Next, the pulley 34 and the electric motor 43 of the rotary cleaning body 30.
A belt 44 for power transmission is hung over the pulley 43a of the electric motor 43 to dispose the electric motor 43 in the electric motor chamber 20 of the lower main body case 12, and the bearing 38 of the rotary cleaning body 30 to the shaft support 39 of the lower main body case 12. The rotary cleaning body (30) is engaged and the lower end of the rotary cleaning body (30) projects slightly downward from the suction port (22) to rotatably support the rotary cleaning body (30).

Then, the communication pipe 24 to which the connection pipe 26 is attached is pivotally supported on the lower body case 12, and the upper body case 13 is engaged with the lower body case 12 to assemble and form the suction port body 11.

On the other hand, at the time of cleaning, the suction port main body 11 is connected to the electric vacuum cleaner main body (not shown) via a hose and an extension pipe. Next, the end portion of the hose on the extension pipe side is gripped and pushed to move the suction port main body 11 back and forth on the floor surface.

First, the advancing direction and traveling speed of the suction port body 11 are detected by advancing direction detecting means (not shown). The control means 45 judges the detected signal, and the electric motor 43 is rotationally driven in a predetermined direction and rotation speed. This electric motor 43
The rotary cleaning member 30 is rotated together with the pulley 34 via the belt 44 in the direction opposite to the advancing direction of the suction port main body 11, and the rotary cleaning member 30 efficiently scrapes dust from the floor surface.

If the floor surface has irregularities such as a tatami mat or a carpet during the rotation of the rotary cleaning body 30, the blade 36a of the blade portion 36 and the brush bristles 37a of the brush portion 37 strike the floor surface. Dust is lifted up like scratches, and dust is scraped off.

Even if the thread dust is caught on the brush portion 37, the blade portion 36 serves as a base and the brush portion 37 is again used.
It can be prevented from being caught on the rotary cleaning body 30, and can be prevented from being entangled with the rotary cleaning body 30, and even if it is entangled, it can be easily removed.

In this way, the dust sucked from the floor surface into the suction chamber 18 through the suction port 22 is the air passage chamber 19 and the communication pipe 2.
4. The dust is collected in the dust collecting chamber of the electric vacuum cleaner body through the connecting pipe 26, the extension pipe and the hose.

In the above embodiment, the brush engaging portion 37b of the brush portion 37 is made of a material having a high specific gravity, and the center of gravity of the rotary cleaning body 30 to which the blade portion 36 and the brush portion 37 are attached has the center of gravity of the rotary cleaning body 30. Since the weight is balanced on the rotation axis, the rotary cleaning body 30 can be smoothly rotated without causing a rotational shake, can efficiently scrape out dust, and can prevent noise, It can also suppress the entanglement of lint.

Although the brush engaging portion 37b of the brush portion 37 is made of a material having a high specific gravity in the above embodiment, the brush engaging portion 37 of the brush portion 37 is shown in FIG.
b is made of the same material as the brush bristles 37a, which is a material having a relatively low specific gravity, and the brush locking portion 37b is made larger than the blade locking portion 36b of the blade portion 36 to increase the weight of the whole and increase the weight. The same effect can be obtained by balancing. Furthermore, the same effect can be obtained even if the brush portion 37 is not formed by flocking, but the brush bristles 37a are formed by caulking with a strip-shaped metal plate, and the metal plate portion is used as a brush locking portion 37b that serves as a weight portion. Is obtained.

Further, as shown in FIG. 6, the length of the brush bristles 37a is set to the width dimension of the blade 36a of the blade portion 36,
That is, when the brush portion 37 and the blade portion 36 are engaged and fixed to the main body portion 32, the length dimension of the brush bristles 37a protruding from the main body portion 32 of the brush portion 37 protrudes from the main body portion 32 of the blade portion 36. The blade 36a may be set longer than the length of the blade 36a to increase the weight of the blade as a whole to balance the weight.

In the rotary cleaning body 30, the blade portion 36 does not contact a flat floor surface such as a board, but contacts an elastically deformable floor surface such as a carpet or tatami mat, and the brush portion 37 is The lower end of the rotary cleaning body 30 is provided so as to slightly project downward from the suction port 22 so as to contact the floor surface.

With this structure, the blade portion 36 does not come into contact between the plates when it is between the plates, and the brush portion 37 having the brush bristles 37a having a higher flexibility than the blade portion 36 contacts the floor surface. Since they are in contact with each other, noise can be reduced.

Further, although the brush engaging portion 37b of the brush portion 37 has been described as a weight portion, a weight portion is separately provided on the inner peripheral surface of the groove portion 31 without increasing the weight of the brush portion 37 as a whole.
The brush locking portion 37b is engaged and fixed to the groove portion 31 so that the center of gravity of the rotary cleaning body 30 with the blade portion 36 and the brush portion 37 attached is located on the rotary shaft of the rotary cleaning body 30 to balance the weight. Even if it does so, the same effect can be obtained.

Further, although the pair of groove portions 31 are provided in the main body portion 32 for explanation, a plurality of groove portions 31 may be provided. When providing a plurality of groove portions 31, for example, when providing four groove portions 31, the same members of the blade portion 36 and the brush portion 37 are located in the diametrical direction, and when providing, for example, six groove portions 31,
As shown in FIGS. 7 and 8, different members are positioned in the diametrical direction.

On the other hand, although the main body 32 of the rotary cleaning body 30 is formed by insert molding in the above description, any molding method can be used.

Further, although the rotary cleaning body 30 is rotated by the rotational drive of the electric motor 43 via the belt 44 as the transmission means, the rotary cleaning body 30 may be driven by meshing with a gear or the like.

Further, the vacuum cleaner is not limited to a canister type vacuum cleaner, but an upright type in which the suction port body 11 is directly formed on the lower surface of the vacuum cleaner body, or the vacuum cleaner body and the suction port body 11 are integrated. It can also be applied to self-propelled electric vacuum cleaners.

[0048]

According to the suction port body of the vacuum cleaner of the first aspect, since the weight portion is provided in the vicinity of the base end of the light weight brush portion that engages with the groove portion of the shaft member, the blade portions having different weights are provided. It is possible to balance the weight of the brush portion with the brush portion, prevent rotation blurring, reduce noise due to rotation blurring, and improve cleaning efficiency.

According to the suction port body of the electric vacuum cleaner of the second aspect of the present invention, the length of the brush portion, which is light in weight, protruding from the shaft member is longer than the length of the blade portion. Weight balance with the parts can be achieved, rotation blur can be prevented, noise due to rotation blur can be reduced, and cleaning efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway exploded perspective view showing a rotary cleaning body of an embodiment of a suction port body of an electric vacuum cleaner according to the present invention.

FIG. 2 is a cross-sectional view showing the vicinity of the shallow side of the groove portion on the pulley side showing the rotary cleaning body.

FIG. 3 is a cross-sectional view of the vicinity of a deep side of a groove portion showing the same main body portion.

FIG. 4 is a partially cutaway plan view showing a suction port main body for accommodating a rotary cleaning body.

FIG. 5 is a sectional view showing a rotary cleaning body according to another embodiment of the present invention.

FIG. 6 is a sectional view showing a rotary cleaning body according to still another embodiment of the present invention.

FIG. 7 is a sectional view showing a rotary cleaning body according to still another embodiment of the present invention.

FIG. 8 is a perspective view of the same.

FIG. 9 is an exploded perspective view with a part cut away showing a conventional rotary cleaning body.

FIG. 10 is a partially cutaway plan view showing a suction port main body for accommodating a rotary cleaning body.

[Explanation of symbols]

 11 Suction port main body 15 Case body 22 Suction port 30 Rotating cleaning body 31 Groove 32 Body part as shaft member 36 Blade part 37 Brush part 37a Brush bristles 37b Brush locking part to be a weight part 43 Electric motor as driving means

Claims (2)

[Claims] 1. A suction port body comprising a case body having a suction port opened at a lower surface thereof and a rotary cleaning body which faces the suction port and is rotated by the drive of a driving means, wherein the rotary cleaning body is arranged along an axial direction. A shaft member that is provided with a plurality of groove portions and is rotatably supported by the case body so as to face the suction port, a strip-shaped blade portion that is engaged with the one groove portion of the shaft member and is made of a soft member, and the shaft. An electric vacuum cleaner comprising: a brush portion that is engaged with the other groove portion of the member and has bristles; and a weight portion that is provided near a base end of the brush portion that is engaged with the groove portion. Suction body. 2. A suction port body comprising a case body having a suction port opened on a lower surface thereof, and a rotary cleaning body which faces the suction port and is rotated by the drive of a drive means, wherein the rotary cleaning body is arranged along an axial direction. A shaft member that is provided with a plurality of groove portions and is rotatably supported by the case body so as to face the suction port, a strip-shaped blade portion that is engaged with the one groove portion of the shaft member and is made of a soft member, and the shaft. And a brush portion having brush bristles engaged with the other groove portion of the member, wherein the length dimension of the brush portion protruding from the shaft member is longer than the length dimension of the blade portion. Vacuum cleaner suction body.