JP3449677B2 - Vacuum cleaner suction body - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cleaning body incorporated in a suction port body of an electric vacuum cleaner, and more specifically,
The present invention relates to a suction port body of an electric vacuum cleaner in which a cross-sectional shape of a blade is improved so as to enhance a dust collecting function while reducing a contact resistance with a surface to be cleaned.

[0002]

2. Description of the Related Art Conventionally, an electric vacuum cleaner is provided with a suction port body which communicates with a main body of a vacuum cleaner having a suction fan and collects dust on a surface to be cleaned.

The suction port body has a shell-type housing that covers the floor surface, and the housing has a suction passage communicating with the cleaner body. Recently, a housing in which a rod-shaped rotary cleaning body having a blade installed on the peripheral surface is built in the housing is commercially available.

The suction port body is provided with a motor for rotating the rotary cleaning body and a power transmission mechanism for rotating the rotary cleaning body by the rotational force of the motor, and is provided between the cleaner body and the suction port body. With the switch on the handheld control unit,
The motor is turned on and off to rotate the rotary cleaning body.

The rotary cleaning body has a rod-shaped shaft core portion having bearing portions at both ends thereof, and a blade extending in the axial direction is projected on the peripheral surface of the shaft core portion. The blade is provided on the peripheral surface of the shaft core in a slightly spiral shape, and protrudes in a direction normal to the tangent to the peripheral surface of the shaft core having a substantially circular cross section. A gear driven by the power transmission mechanism of the motor is provided at one end of the shaft core portion, and is rotated by receiving the driving force of the motor.

Since the suction inlet of such a conventional electric vacuum cleaner only projects in the normal direction from the peripheral surface of the shaft core, the contact area with the surface to be cleaned per rotation is small. The dust collecting function of collecting dust from the surface to be cleaned and the scraping function of scraping off persistent dirt adhering to the surface to be cleaned tend to be weak.

Therefore, in order to improve the dust collecting function and the scraping function, the rigidity of the blade is increased to increase the resistance to the surface to be cleaned, or the contact area between the blade and the surface to be cleaned is increased. Measures have been taken to increase the number of rotations of the rotary cleaning body to increase the number of blade contacts.

[0008]

However, in the case of the suction inlet of the conventional vacuum cleaner, if the rigidity of the blade is increased, the torque of the motor of the drive source must be increased and the number of rotations can be increased. There is a problem that you cannot do it.
Next, when increasing the contact area between the blade and the surface to be cleaned, if the blade is enlarged, the outer size of the rotary cleaning body becomes large, and noise is generated by colliding with the surface to be cleaned such as tatami mat or wooden floor surface. There is a problem in that the blade is made large, the blade itself or the surface to be cleaned is damaged, and it is disadvantageous in reducing the size of the suction port body.

On the other hand, when the torque of the motor of the rotary cleaning body is increased, the load on the blade becomes large and the tip portion becomes fragile, or there is a problem that the root is cracked and damaged, and the blade material selection range is increased. However, this is one of the causes of the cost increase due to its narrow size.

The suction port body of the electric vacuum cleaner of the present invention has been made by paying attention to such a problem, and can improve the dust collecting function or the scraping function and promote the downsizing of the suction port body. The purpose is to be able to expand the selection range of materials.

[0011]

In order to solve the above problems, the suction port body of the electric vacuum cleaner according to claim 1 of the present invention communicates with the main body of the vacuum cleaner and sucks dust from the surface to be cleaned.
A suction port body, wherein the intake so as to wipe the surface to be cleaned while rotating around parallel rotational center axis to the cleaning surface
It has a rotary cleaning body provided on the main body of the inlet,
The body includes a shaft core portion provided with a plurality of spirally extending grooves and a front portion.
Consists of multiple elastic members whose bases are fixed to the grooves
In the suction port body of a vacuum cleaner equipped with a blade, the
The cross-sectional shape of each blade is convex in the direction of rotation.
From the base including the tip that contacts the surface to be cleaned
It is characterized by being curved in an arc shape .

[0012]

[0013]

According to a second aspect of the present invention, in the suction port body of the electric vacuum cleaner, the suction port body communicating with the main body of the electric vacuum cleaner and sucking dust from the surface to be cleaned has a center axis of rotation parallel to the surface to be cleaned. In the suction port body having a rotary cleaning body provided to wipe the surface to be cleaned while rotating as, the blade has a cross-sectional shape that bifurcates from the base attached to the shaft core toward the tip. The bifurcated cross-section portion has a convex cross-section so that the tip portions are close to each other and the space of the branch portion swells.

According to a third aspect of the present invention, in the suction port body of the electric vacuum cleaner according to the second aspect of the present invention, the bifurcated tip ends of the blades have different radial lengths. It is characterized by reducing the rotation resistance when wiping the floor surface.

According to a fourth aspect of the present invention, the suction port body of the electric vacuum cleaner is the suction port body of the electric vacuum cleaner according to the first to third aspects, wherein the rotary cleaning body is a cloth or a cloth equivalent to the blade. In addition to the soft wiping member, the radius of gyration of the tip portion forming the rotation region of the blade is set to be smaller than the radius of gyration of the wiping member.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a rotary cleaning body according to a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 6 shows a schematic perspective view of an electric vacuum cleaner provided with a rotary cleaning body according to an embodiment of the present invention. In this electric vacuum cleaner, a hose 2 is attached to a hose attachment / detachment opening 1a of a cleaner body 1, The extension pipes 3 and 4 are connected in series to the hand operation unit 2a of the hose 2. The suction port body 5 is connected to the tip ends of the extension pipes 3 and 4. The suction port body 5 is provided with a motor 6 (see FIG. 8) that is rotationally driven by a switch operation in the hand operation unit 2a, and via the hose 2, the hand operation unit 2a, and the extension tubes 3 and 4. Wiring for supplying power from the cleaner body 1 is provided.

As shown in FIGS. 7, 8 and 9, the suction port body 5 forms a hollow body by an upper shell-shaped housing 5a and a lower housing 5b, and the suction port body 5 is provided at the rear part of the suction port body 5. The protruding connecting cylinder portion 7 communicates with the inside of the suction port body 5. In the lower housing 5b, grooves 8 and 9 each having a semicircular cross section in the ceiling wall surface are formed in parallel in front of and behind the suction port body 5 so as to extend in the longitudinal direction of the suction port body 5. Inside the grooves 8 and 9, the rotary cleaning bodies 10 and 10 each having a rotation center axis extending parallel to the floor surface to be cleaned.
Are arranged respectively. Openings 11a and 11b communicating with the inside of the suction port body 5 are formed in the ceiling portion of the grooves 8 and 9 at the central portion in the longitudinal direction of the suction port body 5. The dust wiped off by the rotary cleaning bodies 10 and 10 has openings 11a and 1
1b enters the suction port body 5 and is collected in the dust collection bag of the cleaner body 1 through the connecting cylinder portion 7, the extension pipes 4, 3, the hand operation portion 2a, and the hose 2. .

The power transmission mechanism of the motor 6 for driving the rotary cleaning body 10 is composed of a gear, a belt and a pulley mechanism. The drive circuit (not shown) of the motor 6 is a hand operation unit 2a.
Controlled by the switch circuit. In this embodiment, the pair of front and rear rotary cleaning bodies 10 and 10 enclose dust on the floor surface in the central portion of the suction port body 5 toward the openings 11a and 11b, so that the dust collection space 12 in the suction port body 5 is closed. It rotates in the direction of sucking in (direction of arrow A, B in FIG. 7). Reference numeral 13 is a roller provided in the center of the lower housing 5b,
The roller 13 and the rear edge portion 14 maintain the clearance between the lower housing 5b and the floor surface. Around the joint between the lower housing 5b and the upper housing 5a, a bumper 15 is sealed, and a lip 16 is provided on the front edge of the lower housing 5b, so that the suction port 5 has a lower suction portion. The negative pressure is increasing.

FIG. 1 shows a schematic sectional structure of a rotary cleaning body 10 of this embodiment. In the rotary cleaning body 10, four blades 18 are provided around a metal shaft core 17 made of, for example, an aluminum alloy. In this embodiment, the blade 18 is made of, for example, an elastomer such as butyl rubber, silicon rubber, or other synthetic rubber, a single material such as soft polyethylene, polyvinyl chloride, polyvinylidene chloride, or a composite material.

Four grooves 19 having a circular cross section are formed around the shaft core portion 17 at equal intervals. The groove 19 is the shaft core portion 17.
Spirally extends in the direction in which. A semicircular base portion 20 of the curved blade 18 is closely fixed to the groove 19. As shown in FIG. 5, a tubular portion 21 connected to and connected to the axial core portion 17 is provided at one end of the axial core portion 17, and a gear 22 is attached to the tubular portion 21. A bearing 23 is provided on the outer side of the gear 22 so that the gear 23 and the shaft core portion 17 can freely rotate. Further, the blade 18 of the shaft core 17 is attached to one end of the shaft core 17.
A cylinder portion 24 for restricting the movement of the cylinder portion in the longitudinal direction is attached, and a bearing 25 is attached to the end portion where the cylinder portion 24 is provided. Bearing 23, 25
Are held in recesses provided on both sides of the grooves 8 and 9 of the housing 5b. The gear 22 is driven by the motor 6 via a power transmission mechanism such as a gear mechanism.

The blade 18 is curved in an arc shape from the base portion 20 and is curved and convex in the front in the rotation direction Cw shown in FIG. Cw at the tip of the blade 18
Three beads 21 extending in the longitudinal direction of the blade 18 are formed on the surface that collides with the floor surface when rotating in the direction. The thickness of the tip portion where the bead 21 is formed is formed to be slightly thicker than the thickness of the middle portion, and the blade 18 itself is easily bent at the middle portion, and the bead 21 is projected at three places. , So that the strength of the tip portion is improved.

In the rotary cleaning body 10 of this embodiment, the area where the bulging side wall surface 18a of the blade 18 contacts the floor surface is increased, and the contact area with the floor surface is further increased. In particular, the blade 18 bends so as to fall when colliding with the floor surface, but since it is curved, the shaft core portion 1
Even if it is rotated at the same rotation speed as that which linearly projects from the radial direction from 7, the contact time and the contact distance between the bulging side wall surface 18a and the floor surface are long. Further, since the blade 18 is curved and further bent, the contact area between the blade 18 and the surface to be cleaned per rotation is large, and the wiping area is increased.

Therefore, the dust collecting ability of the rotary cleaning body 10 is improved, the frictional resistance per contact area of the rotary cleaning body 10 is reduced, and the durability can be improved while increasing the number of rotations of the rotary cleaning body 10. it can. Further, since the dust collecting function can be improved, the rotary cleaning body 10 and the suction port body 5 can be reduced in size and weight, the frictional resistance per area of the blade 18 is reduced, and the occurrence of scratches or the like on the surface of the blade 18 is reduced. Therefore, the selection range of the material of the blade 18 is expanded, and the cost can be reduced.

Further, since the blade 18 is curved so as to have a convex shape with respect to the rotation direction, the rotation direction of the blade 18 and the moving direction of the surface to be cleaned coincide with each other, and the blade 18 moves on the floor surface. When rotating so as to push backward, even if the contact area increases, the rotation resistance decreases and the rotation speed increases, so the dust collecting function is further improved.

The blade shown in FIG.
8 may be curved so as to have a concave shape with respect to the rotation direction Cw. If the blade 18 is curved so as to have a concave shape with respect to the rotation direction Cw, the function of scraping the floor surface increases, so that dust, dirt, liquid, etc. adhering to the floor surface with a strong force can be wiped off. it can.

2 and 5 show a rotary cleaning body 30 according to a second embodiment of the present invention. This rotary cleaning body 30 is shown in FIG.
The shaft core 31 is made of metal and has the same cross-sectional shape as that shown in FIG. 4, and four semicircular grooves 32 are formed at equal angles on the peripheral surface of the shaft core 31. The groove 32 spirally extends in the longitudinal direction of the shaft core portion 31, and the base portion 33 having a semicircular cross section of the blade 33 similar to that in FIG. 1 is closely held in the groove 32. The structure of both end portions of the shaft core portion 31 is the same as that of the rotary cleaning body 10 of FIG. Grooves 32, 3 at positions perpendicular to the line connecting the pair of opposed grooves 32, 32
2 is provided with a cloth wiping member 34. The base 35 of the wiping member 34 is made of synthetic rubber, and has grooves 32, 32.
It is held in close contact with. The radius of rotation R1 of the tip of the blade 33 that forms the rotation region of the blade 33 is set smaller than the radius of rotation R2 of the tip of the wiping member 34.

The wiping member 33 attached to the base portion 35 may be made of a soft material equivalent to cloth (for example, non-woven fabric such as felt or rubber). The rotary cleaning body 3 of FIG.
According to No. 0, it is possible to carefully clean dust and the like having a small particle diameter adhering to the surface to be cleaned, and to simultaneously collect dust and wipe the surface to be cleaned such as a flooring.

FIG. 3 shows a rotary cleaning body 40 according to a third embodiment of the present invention. This rotary cleaning body 40 is similar to the shaft core portions 19 and 31 in FIGS. 1 and 2 in that four grooves 42 having a semicircular cross section are spirally formed around the shaft core portion 41. The shape of the blade 43 is different. The blade 43 is bifurcated from a base portion 44 that is closely fitted and fixed to the groove 42, and further, a branched portion 45 is bulged so that an intermediate portion is bulged, and tip portions 46 and 46 are separated from each other. .
Therefore, according to the rotary cleaning body 40 of FIG. 3, since it is possible to wipe and scrape in both rotation directions Cw and CCw, it is possible to exert the dust collecting function and the wiping and removing function of persistent dirt. More careful cleaning can be performed regardless of the direction in which the body 5 is moved.

Further, when the blade 43 has a hollow closed cross-section structure, the blade is deformed when it hits the cleaning floor surface during rotation, but the entire blade 43 easily bends from the root due to the closed cross section, so the blade 43 Fatigue accumulates at the roots of the base and the base 44, and cracks are likely to occur. However, as in this embodiment, since the blade 43 is bifurcated and the tip portions 46, 46 of the blade 43 are separated from each other, there is no possibility that the blade 43 will be cut from the root.

FIG. 4 shows a rotary cleaning body 50 according to the fourth embodiment of the present invention. The rotary cleaning body 50 has a shaft core portion 51.
The groove 52 having a semicircular cross section is formed in a spiral shape at four places around the shaft core portions 19, 31, 41 in FIGS. 1, 2, and 3.
However, the shape of the blade 53 is different from that of the blade 43 of FIG. 3, and the lengths of the tip end portions 54a and 54b are different.

The mounting direction of the blade 53 is also 90 °.
The direction of the blade 53 is changed for each of them, and the pair of blades 53a, 53a in the diametrical direction and the pair of blades 53b, 53b in the position displaced by 90 ° rotate the rotary cleaning body 50 in either direction. Even so, the dust collection function by wiping and the function by scraping off work equally.

In the rotary cleaning body 50 shown in FIG. 4, the bifurcated end portions 54a and 54b have different radial lengths, so that the rotation resistance at the time of wiping the floor surface is reduced, the friction resistance is reduced, and the dust collecting function is achieved. It is possible to perform cleaning that emphasizes the importance of cleaning and cleaning that removes persistent dirt by the scraping function, and even if dust enters the inside of the branch portion 55 of the blades 53a and 53b, it is discharged by the centrifugal force from the separating portion 56 and the suction port. The blade 53 is sucked into the body 5.
Contamination of a and 53b is reduced.

[0034]

Suction port of the electric <br/> air cleaner above-described invention of claim 1 as according to the present invention includes a suction inlet main body for sucking dust from a cleaning surface in communication with the cleaner body, the A rotary cleaning body provided on the suction port main body so as to wipe the surface to be cleaned while rotating around a rotation center axis parallel to the cleaning surface.
The rotary cleaning body has a plurality of spirally extending grooves.
The shaft core part and the base part fixed to the groove.
In the suction port body of the electric vacuum cleaner having the blades made of a number of elastic materials , each of the blades has a cross-sectional shape in the rotation direction.
The tip that touches the surface to be cleaned so that
Including a configuration that is curved in an arc from the base
Therefore, when the rotary cleaning body rotates, the contact area where the blade and the floor surface come into contact with each other becomes large, which improves the dust collecting ability.

According to the suction port body of the vacuum cleaner of the first aspect of the invention , each blade of the rotary cleaning body has a cross-sectional shape.
Contact the surface to be cleaned so that it becomes convex in the direction of rotation.
It is curved in an arc shape from the base including the tip.
Therefore , when the rotating direction of the blade and the moving direction with respect to the surface to be cleaned coincide, and the blade rotates so as to push the surface to be cleaned backward, even if the contact area becomes large,
Since the rotation resistance is reduced and the rotation speed is increased, the dust collecting function is further improved.

[0036]

Further, like the suction port body of the electric vacuum cleaner according to claim 2 of the present invention, the blade has a cross-sectional shape that bifurcates from the mounting base portion toward the tip portion, and bifurcates. If the cross-section has a convex cross-section so that the tips approach each other and the space at the branch bulges out, wiping and scraping can be performed in either rotation direction, so that the dust collection function The function of wiping and removing persistent dirt can be exerted, and more careful cleaning can be performed regardless of the direction in which the suction port body is moved.

Further, like the suction port body of the vacuum cleaner according to claim 3 , in the blade of the rotary cleaning body according to claim 2 , the bifurcated tip portions are made to have different radial lengths to wipe the floor surface. If you reduce the rotation resistance at the time, you can reduce the frictional resistance and perform cleaning that emphasizes the dust collection function and cleaning that removes persistent dirt with the scraping function,
Dust between the branched portions is discharged and is easily sucked into the suction port body, and the rotary cleaning body is less likely to get dirty.

Further, like the suction port body of the vacuum cleaner according to claim 4 of the present invention, in the rotary cleaning body according to claims 1 to 3 , the rotary cleaning body is a cloth or a cloth-like soft material in addition to the blade. If the radius of rotation of the tip portion that forms the rotation region of the blade is set to be smaller than the radius of rotation of the wiping member as well as one or more of the wiping members described above, dust and the like with a small particle size that adheres to the surface to be cleaned are also included. Not only can it be cleaned carefully, but the surface to be cleaned, such as a flooring, can be used for dust collection and wiping at the same time.

[Brief description of drawings]

FIG. 1 is a sectional view of a rotary cleaning body of an electric vacuum cleaner according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a rotary cleaning body of the electric vacuum cleaner according to the second embodiment of the present invention.

FIG. 3 is a sectional view of a rotary cleaning body of an electric vacuum cleaner according to a third embodiment of the present invention.

FIG. 4 is a sectional view of a rotary cleaning body of an electric vacuum cleaner according to a fourth embodiment of the present invention.

FIG. 5 is a perspective view of a rotary cleaning body of the electric vacuum cleaner according to the second embodiment of the present invention.

FIG. 6 is a schematic diagram of an electric vacuum cleaner according to an embodiment of the present invention.

7 is a sectional view taken along line AA of the suction port body of FIG.

8 is a sectional view of the suction port body of FIG. 6 taken along the line BB.

9 is a sectional view taken along line CC of the suction port body of FIG.

[Explanation of symbols]

5 Suction mouth 7 Tube 10 rotating cleaning body 17 Shaft core 18 blade 19 groove 20 base 21 beads

─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP-A-52-126068 (JP, A) JP-A-7-204135 (JP, A) JP-A-4-322627 (JP, A) JP-A-4- 17825 (JP, A) JP-A-9-187405 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A47L 9/04

Claims (4)

(57) [Claims] 1. A and the suction port main body for sucking dust from a cleaning surface in communication with the cleaner body, the suction so as to wipe the surface to be cleaned while rotating around parallel rotational center axis to the cleaning surface It has a rotary cleaning body provided on the mouth body, and the rotary cleaning body is provided with a plurality of spirally extending grooves.
A shaft core and a plurality of bullets each having a base fixed to the groove.
In a suction port body of an electric vacuum cleaner including a blade made of a flexible material , each of the blades has a cross-sectional shape that is convex in the rotation direction.
The base portion including a tip portion that contacts the surface to be cleaned so that
The suction inlet of the vacuum cleaner is characterized by being curved in an arc shape from the . 2. A suction port body communicating with a main body of an electric vacuum cleaner for sucking dust from a surface to be cleaned is provided so as to wipe the surface to be cleaned while rotating about a rotation center axis parallel to the surface to be cleaned. In the suction port body having the rotating cleaning body, the blade has a cross-sectional shape that bifurcates from the base portion attached to the shaft core portion toward the tip portion, and the bifurcated cross-sectional portion is, A suction port body for an electric vacuum cleaner, which has a convex cross section so that the tip portions thereof approach each other and the space of the branched portion swells. In the suction port body 3. A process according to claim 2 vacuum cleaner,
A suction opening body of an electric vacuum cleaner, wherein the bifurcated tip ends of the blades have different radial lengths to reduce rotational resistance when wiping the floor surface. 4. A suction mouth of claims 1 to 3 vacuum cleaner, wherein the rotation cleaning member comprises a wiping member in addition to the fabric or cloth corresponding soft of the blade, the rotation region of the blade The suction radius of the vacuum cleaner is characterized in that the radius of rotation of the tip portion formed is set to be smaller than the radius of rotation of the wiping member.