AU692175B2

AU692175B2 - Suction member for use with vacuum cleaner

Info

Publication number: AU692175B2
Application number: AU75911/94A
Authority: AU
Inventors: Toshiyuki Fujiyoshi; Atsuo Hamada; Toshinari Kobayashi; Tooru Oike; Kimio Sasada
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 1993-10-28
Filing date: 1994-10-18
Publication date: 1998-06-04
Anticipated expiration: 2014-10-18
Also published as: DE69409605D1; AU7591194A; EP0650688A1; DE69409605T2; KR960012807B1; KR950010838A; EP0650688B1

Description

1

AUSTRALIA

PATENTS ACT 1990 CT 0M P ,T F 1 SP. rT1T r 1 m T fn C 0 M P R T E P E C F T r M T n FOR A STANDARD PATENT

ORIGINAL

Name of Applicant: Actual Inventors: SANYO ELECTRIC CO., LTD.

Kimio SASADA, Atsuo HAMADA, Tooru OIKE, Toshinari KOBAYASHI and Toshiyuki FUJIYOSHI SHELSTON WATERS 55 Clarence Street SYDNEY NSW 2000 "SUCTION MEMBER FOR USE WITH VACUUM CLEANER"

S*

Address for Service: Invention Title: The following statement is a full description of this invention, including the best method of performing it known to us:- I I L LIAC- I81 1 -113-- Tla- SUCTION MEMBER FOR USE WITH VACUUM CLEANER BACKGROUND OF THE INVENTION The present invention relates to improvements in suction members to be attached to vacuum cleaners for use in cleaning, for example, bedclothes and curtains.

Among conventional suction members of this type, there are known suction members of the type having a rotatable member with a multiplicity of perforations rotatably mounted on a cylindrical suction member body, as disclosed in Japanese Unexamined Patent Publication No.

158068/1979 (92(3)D101.9) and Japanese Unexamined Utility Model Publication No. 79761/1977 (92(3)D101.9). These suction members are adapted to draw in dust from an air inlet defined in a lower portion of the outer surface of the suction member body through the rotatable member and 15 thereby to collect dust into a vacuum cleaner through a pipe connected to a side of the suction member body.

The suction member disclosed in Japanese Utility Model Publication No. 79761/1977 (92(3)D101.9) comprises 0 a suction member body defining air inlets in a lower portion of the outer surface thereof, a suction member cover fitted around and bonded to a lateral side of the suction member body with a pipe to be connected to a vacuum cleaner being force fitted thereinto, and a rotatable member with a multiplicity of perforations 25 rotatably covering t' J outer surface of the suction member body, the rota. jle member being supported at the outer surface of a pipe support portion of the suction member cover so as not drop out.

The rotatable member of the suction member disclosed in Japanese Unexamined Patent Publication No 158068/1979 comprises an annular one-piece mesh covering the entire outer surface of the suction member body. This impedes easy changes of the moving direction of the suction member body, resulting in poor cleaning operability.

Further, since the rotatable member is of a -e 2 simple mesh structure, hair and waste thread are likely to be caught by the rotatable member and, hence, a difficulty exists in cleaning a surface of an object.

Still further, since the rotatable member abuts the entire outer surface of the suction member body, the rotatable member has an increased friction resistance against the suction member body and hence suffers poor mobility and poor cleaning operability.

Furthermore, the rotatable member comprises the annular one-piece mesh covering the entire outer surface of the cylindrical suction member body and an air inlet is defined by notching a portion of the cylindrical body of the suction member body. For this reason, the suction member body is likely to sink into bedclothes or curtains, thus rendering the mobility thereof poor.

Yet further, to rotatably mount the rotatable member on the suction member body, the both ends of the 99*9 rotatable member are threaded, and in correspondence therewith the outer periphery of each disc provided to the 20 lateral side of the suction member body is required to be threaded, resulting in a complicated structure.

Further still, the connection pipe of the suction member of Japanese Unexamined Patent Publication No. 158068/1979 is fixedly secured to the lateral side of the suction member body. This causes the angle of the 0 suction member body with respect to a surface for cleaning 00. 9: to vary in the push-pull operation of the suction member body thereby varying the distance between the air inlet and the surface for cleaning and the angle made therebetween. This in turn causes the suction force exerted on the surface for cleaning to vary, thus resulting in nonuniform cleaning.

With the suction member disclosed in Japanese Unexamined Utility Model Publication No. 79761/1977, on the other hand, since it is impossible to separate the suction member body, suction member cover and rotatable member from each other, there might occur inconveniences such that the rotatable member cumulatively catches hair I -3and the like at perforations thereof during long use thereby impeding smooth rotation thereof and lowering cleaning operability, or that hair lodged at the air inlet of the suction member body cumulatively attracts dust thereby lowering the suction efficiency.

Further, since the suction member is of a structure such that a connection pipe is force fitted into the suction member cover, there might be a case where the connection pipe is not securely held by the suction member cover because of errors in the production of the connection pipe and suction member cover and, hence, the suction member cover frequently comes off the connection pipe, thus degrading the cleaning operability.

Furthermore, since the overall rotatable member is formed as having an even diameter, the rotatable member will be pressed against the suction member body and any perforation of the rotatable member is caught by the air inlet, with the result that rotation *c of the rotatable member is impeded unfavorably to degrade the mobility of the suction member, thus raising a problem of degraded cleaning operability.

It is, therefore, an object of the present invention to overcome or substantially 1s ameliorate one or more of these disadvantages of the prior art.

SUMMARY OF THE INVENTION "I In accordance with the invention there is provided a suction member for use with a vacuum cleaner including a suction member body having an air inlet in a lower portion of the outer surface thereof and a rotatable member provided around at least a portion of the outer surface of the suction member body, wherein said rotatable member defines a multiplicity of elongated openings, Preferably, the opening defined in the rotatable member is shaped substantially similar to the air inlet of the suction member body.

i., Further, preferably, the air inlet and the opening are both in laterally elongated form.

In use, dust on a surface for cleaning is drawn in at the air inlets of the suction member body through small perforations of the rotatable members. When the suction member body is moved, the rotatable members rotate because of the frictional resistance thereof against the surface for cleaning. Since the rotatable members are inde, endently rotatable on both sides of the suction member body, the moving direction of the suction member body can be changed with ease.

Preferred embodiments of the invention will now be described, by way of example 10 only, with reference to the accompanying drawings in which: Fig. 1 is a partially exploded perspective view of one embodiment of the present o invention;

*S.

Fig. 2 is a perspective view of the embodiment; Fig. 3 is a bottom view of the embodiment in a state where one of rotatable g ,e 15 members is detached; Fig. 4 is a sectional view of the embodiment; Fig. 5 is a sectional view of the embodiment as viewed from another direction; Fig. 6 is a sectional view showing a wheel and rotatable member of the embodiment Fig. 7 is a sectional view of another embodiment of the present invention, corresponding to Fig. Fig. 8 is a sectional view of another embodiment of the present invention, corresponding to Fig. 4; eTi. !n.

4'/fS 1'>V Fig. 9 is a perspective view of another embodiment of the present invention; Fig. 10 is sectional view showing a wheel and rotatable member of another embodiment; Fig. 11 is a perspective view of still another embodiment of the present invention; Fig. 12 is a sectional view taken along the line A-A of Fig. 11; Fig. 13 is a sectional view taken along the line B-B of Fig. 11; Fig. 14 is a bottom view of the embodiment shown hin Fig. 11; Fig. 15 is a sectional view of yet another embodiment of the present invention wherein the left-hand fragmentary portion is rotated by 10 Fig. 16 is an exploded view showing components of the embodiment shown in Fig.

SFig. 17 is a bottom view of the embodiment shown in Fig. 15 wherein a rotatable member and bearing member on the left-hand side are removed; B Fig. 18 is an exploded bottom view of the suction member body of the 15 embodiment shown in Fig. Fig. 19 is a secti,;nal view taken along the line

S.

!2' -6- A-A of Fig. Fig. 20 is a sectional view taken along the line B-B of Fig. Fig. 21 is a sectional view taken along the line C-C of Fig. Fig. 22 is a sectional view of another embodiment of the present invention, corresponding to Fig.

19; Fig. 23 is a sectional view of another embodiment of the present invention wherein the left-hand fragmentary portion is rotated by 90 Fig. 24 is a sectional view of another embodiment of the present invention wherein the left-hand fragmentary portion is rotated by 90 Fig. 25 is a sectional view of another embodiment of the present invention wherein the left-hand fragmentary portion is rotated by 90 Fig. 26 is a sectional view taken along the line D-D of Fig. 20 Fig. 27 is a sectional view of another embodiment of the present invention wherein the left-hand fragmentary portion is rotated by 90 Fig. 28 is a sectional view of another embodiment of the present invention wherein the left-hand 25 fragmentary portion is rotated by 90" Fig. 29 is a sectional view of another embodiment of the present invention wherein the left-hand and right-hand fragmentary portions are rotated by 90" Fig. 30 is an exploded view showing components of the embodiment shown in Fig. 29; Fig. 31 is a sectional view taken along the line E-E of Fig. 29; Fig. 32 is a sectional view of another embodiment of the present invention wherein the left-hand and right-hand fragmentary portions are rotated by 90" Fig. 33 is a plan view of the suction member body of another embodiment of the present invention; Fig. 34 is an exploded view showing components i 1 4 11 of the embodiment shown in Fig. 33; and Fig. 35 is a bottom view of another embodiment of the present invention wherein a rotatable member and bearing member on the left-hand side are removed, DETAILED DESCRIPTION Referring to Figs. 1 to 6 showing a si:tion member according to one embodiment of the present invention, the suction member includes a suction member body 1 of a synthetic resin comprising a substantially T-shaped connection pipe 2 and a pair of substantially cylindrical tubes 3 each fusion-bonded at one open end thereof to the peripheral edge of each opening of the connection pipe 2. The connection pipe 2 has a plurality of air inlets 4 defined in a lower portion of the outer surface thereof, while each of the tubes 3 has a multiplicity of air inlets 5 defined in a lower portion of the outel surface thereof. Each tube 3 is formed with annular ribs 6 at the opposite ends thereof and at a central portion thereof, which have a diameter larger than the outer diameter of the tube 3.

5* 15 The opposite ends of the suction member body 1 are attached wheels 7 of a synthetic resin which are each rotatably supported by fitting a shaft hole 11 thereof around a support portion 10 formed as projecting from each end of the suction member body I and which are each prevented from dropping out by the washer of a screw 12 serving as a holding member to be threadingly fixed to the support portion 10. As shown in Fig. 6, each wheel 7 is formed integrally with each rotatable membe 8 to be described later by insert molding the end portion of the rotatable member 8 and the wheel 7 or inserting the end portion of the rotatable member 8 into a groove defined in the wheel 7 and fixing them with adhesive. Accordingly, each rotatable member 8 is adapted to rotate as the corresponding wheel 7 rotates.

8of the embodiment shown in Fig. 33; and Fig. 35 is a bottom view of another embodiment of the present invention wherein a rotatable member and bearing member on the left-hand side are removed.

DETAILED DESCRIPTION The present invention will now be described in detail with reference to the drawings.

Referring to Figs. 1 to 6 showing a suction member according to one embodiment of the present invention, the suction member includes a suction member body 1 of a synthetic resin comprising a substantially :i i T-shaped connection pipe 2 and a pair of substantially cylindrical tubes 3 each fusion-bonded at one open end thereof to the peripheral edge of each opening of the conneciton pipe 2. The connection pipe 2 has a plurality of air inlets 4 defined in a lower portion of the outer surface thereof, while each of the tubes 3 has a :multiplicity of air inlets 5 defined in a lower portion of the outer surface thereof. Each tube 3 is formed with annular ribs 6 at the opposite ends thereof and at a central portion thereof, which have a diameter larger than Sthe outer diameter of the tube 3.

To the opposite ends of the suction member body 25 1 are attached wheels 7 of a synthetic resin which are each rotatably supported by fitting a shaft hole 11 thereof around a support portion 10 formed as projecting from each end of the suction member body 1 and which are each prevented from dropping out by the washer of a screw 12 serving as a holding member to be threadingly fixed to the support portion 10. As shown in Fig, 6, each wheel 7 is formed integrally with each rotatable member 8 to be described later by insert molding the end portion of the rotatable member 8 and the wheel 7 or inserting the end portion of the rotatable member 8 into a groove defined in the wheel 7 and fixing them with adhesive. Accordingly, each rotatable member 8 is adapted to rotate as the Rcorresponding wheel 7 rotates, The mesh-like rotatable members 8 are free fitted around the outer surface of the tubes 3 of the suction member body I and are formed of a flexible material having a large frictional resistance against a surface for cleaning such as a synthetic resin, for example, polypropylene, polyethylene or the like, or rubber. The rotatable members 8, when free fitted around the tubes 3, abut the ribs 6 of the tubes 3 and thereby are kept spaced apart from the outer surface of the tubes 3. Each rotatable member 8 defines a plurality of openings 9 for communication with the air inlets 5 defined in a lower portion of the outer surface of each tube 3 of the suction member body 1.

The suction member thus arranged is connected to a vacuum cleaner (not shown) at the connection pipe 2 and used to clean a surface for cleaning such as bedclothes. When the suction member body 1 is moved forwardly and rearwardly on the surface for cleaning, the wheels 7 and rotatable members 8 in contact with the 20 surface for cleaning rotate because of the friction therebetween. Since the rotatable members 8 rotate while contacting the annular ribs 6 formed as circumferentially projecting from the outer surface of the suction member body 1, the rotatable members 8 have a decreased 25 frictional resistance against the suction member body 1, so that the mobility of the suction member body 1 is enhanced. On both sides of the suction member body 1 are independently rotatably supported rotatable member-wheel pairs. This permits the moving direction of the suction member body 1 to be changed easily. Further, since each wheel 7, which is larger in diameter than each rotatable member 8, covers one end of each rotatable member 8, the mobility of suction member is prevented from degrading because such an end of each rotatable member 8 will never be caught by the surface for cleaning.

The suction force of the vacuum cleaner collects dust and dirt on the surface for cleaning from the air n inlets 5 defined in a lower portion of the outer surface )qg l s~ r~ p- /0 of each tube 3 of the suction member body i. The suction member according to this embodiment is able to keep its satisfactory dust collecting capability since the rotatable members 8 kept spaced apart from the outer surface of the tubes 3 by the ribs 6 prevent the surface for cleaning from blocking up the air inlets 5 of the suction member body 1 by the suction force of the vacuum cleaner.

The rotatable members 8 define the openings 9 for communication with the air inlets 5 of the suction member body 1. Hence, it is possible to assuredly colleuc relatively large dust such as hair or waste thread at positions where the openings 9 come to coincide with the air inlets 5 as the rotatable members 8 rotate.

Further, since the suction member body 1 defines the plh.~z:ty of air inlets 4 in a lower portion of the outer surface of the connection pipe i, the overall lower portion of the suction member body 1 is used to collect dust, thus resulting in no occurrence of uneven cleaning.

20 Where the multiplicity of small perforations of the rotatable members 8 catch hair and the like, it is possible to detach the rotatable members 8 from the suction member body 1 by removing the screws 12 for washing the rotatable members 8 and suction member body 1 separately with water or the like.

It should be noted that each rib 6 is shaped annular and formed around the outer surface of each tube 3 of the suction member body 1 in this embodiment, the rib 6 might be shaped arcuate and provided in a lower portion of the outer surface of the suction member 1 as shown in Fig. 7. This arrangement also allows the rotatable members 8 to be kept spaced apart from the tubes 3 of the suction member body 1 while reducing the frictional resistance between the rotatable members 8 and the tubes 3. Alternatively, ribs 6 in annular shape might be formed integrally with each rotatable member 8 as shown in Fig.

8.

t Further, one end portion of each rotatable is rlI i member 8 might be fusion-bonded or bonded with adhesive to the outer periphery of each wheel 7 as shown in Fig. 9, or otherwise, each rotatable member 8 and the corresponding wheel 7 might be integrally molded together as shown in Fig. Next, description is made on another embodiment of the present invention with reference to Figs. 11 to 14.

A suction member according to this embodiment includes a suction member body 101 of a synthetic resin, and a connection pipe assembly 102 comprising two opposite connection pipes 103,104, an interconnecting pipe 105 in communication with the pipes 103,104 and a connection pipe 106 extending centrally of the interconnecting pipe 105 for connection with a vacuum cleaner, the connection pipe assembly being pivotally supported on opposite walls 107,108 of the suction member body 101. The suction member body 101 defines a plurality of air inlets 109,109. in the bottom thereof. A mesh-like rotatable member 110 is free fitted around the outer surface of the 20 suction member body 101, and is formed of a flexible material having a large frictional resistance against a .surface for cleaning such as a synthetic resin, for example, polypropylene or polyethylene, or rubber. Front wheels 111 and rear wheels 112 are each rotatably 25 supported on the opposite walls 107,108 of the suction member body 101. The rotatable member 110 defines a plurality of air inlets 113,113- each having a sufficiently large hole area relative to each small perforation. The suction member body 101 has curved portions 114,114 forming front and rear parts thereof.

The mesh-like rotatable member 110 is adapted to slide on the bottom 115 of the suction member body 101 and outer surfaces of curved portions 114,114 thereof for rotation.

The suction member thus arranged is connected to a vacuum cleaner (not shown) at the connection pipe assembly 102 thereof and used in cleaning a surface for cleaning such as bedclothes, When the suction member body 101 is moved forward and backward, the wheels 111,112 and rotatable member 110 in contact with the surface for cleaning rotate because of the friction against the surface for cleaning. The rotatable member 110 rotates while sliding on the outer surface of the suction member body 101. The wheels 111,112 are rotatably supported on opposte sides of the suction member body 101 independently of each other and, hence, permit the suction member body 101 to change its moving direction easily. Since the outer diameter of two wheels 111,112 is made larger than that of the curved portions 14 of the rotatable member 110 and the peripheral edges of the rotatable member 110 are covered with the wheels 111,112, it is less likely that the mobility of the suction member is degraded by the peripheral edges of the rotatable member caught by the surface for cleaning. In addition, such arrangement also serves to prevent the rotatable member 110 from dropping out of the suction member body 101.

WFith forward and rearward movements of the suction member body 101, the connection pipe assembly 20 102 pivots with respect to the suction member body 101.

Accordingly, the air inlets 109,109. of the suction member body 101 always keeps an angle with respect to the surface for cleaning (always parallel thereto) thereby keeping the dust collectability of the suction member 25 satisfactory.

Further, since the rotatable member 110 defines the openings 113 for communication with the air inlets 109 of the suction member body 101, it is possible to assuredly collect relatively large dust including hair and waste thread at positions where the openings 113 come to coincide with the air inlets 109 of the suction member body 101 as the rotatable member 110 rotates.

To be described next with reference to Figs. to 21 is another embodiment of the present invention.

A suction member according to this embodiment includes a suction member body 201 comprising a tubular member 202, connection pipe 204, cover 210 and bearing S members 215. The tubular member 202 is formed of a 13 synthetic resin such as ABS resin and shaped substantially cylindrical as having openings on opposite ends thereof.

The tubular member 202 defines in a lower central portion thereof an opening 203 and has a support portion 205 formed inside an upper central portion thereof as adjoining the opening 203 for supporting the connection pipe 204 which is removably connected to a vacuum cleaner (not shown) for communication therewith. The connection pipe 204 is supported by the support portion 205 in a direction generally perpendicular to the longitudinal axis of the tubular member 202 and is pivotable within a predetermined range, specifically within the range of i about 600 in this embodiment.

I The tubular member 202 also defines in the lower :15 face thereof a plurality of air inlets 206 which are each elongated substantially parallel to the longitudinal axis of the tubular member 202. The tubular member 202 is formed with first annular convexes 207 extending around the outer surface of the tubular member 202 at opposite 20 end portions thereof, second convexes 208 extending around the outer surface of portions of the tubular member 202 at locations adjacent the opening 203, and third annular convexes 209 each formed between each first convex 207 and each second convex 208. The first, second and third 25 convexes 207, 208 and 209 together with fourth convexes 214 to be described later approximate or abut support rotatable members 219 to support them while serving to keep the inner surfaces of the rotatable members 219 spaced apart from the outer surface of the suction member body 201.

The cover 210 closing the opening 203 of the tubular member 202 is formed of a synthetic resin such as ABS resin and includes a support portion 211 which, in cooperation with the aforementioned support portion 205, supports the connection pipe 204 for rotation. One side of the cover 210 facing the support portion 211 is fitted into the peripheral edge of the opening 203 and secured to bosses 212 integrally formed with the tubular member 202 14with screws. The bosses 212 are located adjacent both sides of the support portion 205 so as not to interfere with the air flow from the air inlets 206 toward the connection pipe 204. The cover 210 defines a plurality of air inlets 213 elongated substantially parallel to extension lines of the longitudinal axes of the air inlets 206 defined in the tubular member 202. The fourth convexes 214 are formed integrally with the cover 210 and each extend in continuation to each of the second convexes 208 to form annular convexes cooperatively with the second convexes 208.

Bearing members 215 which close the opposite open ends of the tubular member 202 are formed of a synthetic resin such as ABS resin and each have a pair of 15 claws 217 detakchably engaging with a pair of engagement holes 216 defined in each end portion of the tubular member 202 from the inside of the tubular member 202. The bearing members 215 are removably attached to the opposite ends of the tubular member 202 by such claws 217 engaging 20 with the engagement holes 216. Each bearing member 15 has a support portion 218 formed centrally thereof to support a shaft portion 220 (to be described later) of each rotatable member 219 for rotation. The support portion 218 is made relatively long along the longitudinal axis of 25 the tubular member 202 to prolong the length of the shaft "i portion 220 received in the support portion 218, whereby the rotatable member 219 is supported thereon with minimized irregular rotation.

The rotatable members 219 in cylindrical form define a multiplicity of small perforations and cover the outer surface of the tubular member 202 on both sides thereof and are formed of a synthetic resin, such as a poiypropylene resin, which is different from the materials (for example, ABS resin) of the tubular member 202, cover 210, bearing members 215 and support members 224 to be described later. The shaft portion formed at one end of ;FR each rotatable member 219 is rotatably supported on the r J T Z outer periphery of the support portion 218 of each bearing !5 member 215. The other end of the rotatable member 219 approximates each lateral side of a bulged portion 221 formed as circumferentially outwardly bulging in central portions of the tubular member 202 and cover 210 so as to avoid the entry of dust or the like from the space between the aforesaid other end of the rotatable member 219 and the corresponding lateral side of the bulged portion 221 into the space between each rotatable member 219 and the tubular member 202. In this way the rotatable members 219 are prevented from faulty rotation or from generating abnormal noise due to friction. The rotatable members 219 each define a plurality of elongated openings 222 of which the longitudinal axes extend substantially parallel to 0#:Soo: that of the tubular member 202 and of which the 15 circumferential pitch is made larger than that of the air inlets 206 whereby the openings 222 have a reduced hole area in total and, hence, a decrease in the strength of the rotatable members 219 is alleviated. A pair of annular projections 223 are formed integrally with each rotatable wo:% 20 member 219 at the opposite ends of the outer periphery thereof and located adjacent and correspondingly to each first convex 207 and each annular convex comprising second convex 208 and fourth convex 214, each of the annular projections 223 being larger in diameter than the bulged 25 portion 221 of the tubular member 202.

The support members 224 are formed of a synthetic resin such as ABS resin and each threadingly engaged with each support portion 218 to prevenlt each rotatable member 219 from dropping out. Each support member 224 is formed with an annular projection 225 which is adapted to abut or approximate the corresponding rotatable member 219 to reduce the frictional resistance between the support member 224 and the roratable member 219, thereby supporting the rotatable member 219 for easy rotation. Further, each support member 224 is formed with a manipulation knob 226 which is adapted to be h-ld with fingers to rotate the support member 224 and thereby permits the support member 224 to be detached from or J6 attached to the corresponding bearing member 215.

The suction member thus arranged is connected to a vacuum cleaner at the connection pipe 204 through a suction hose and an extension pipe and is then used in cleaning a surface for cleaning such as bedclothes or curtains by actuating the vacuum cleaner and push-pull operating the suction member. Since the connection pipe 204 is pivotable within a predetermined range, specifically within the range of about 60" in this embodiment, a cleaning operation can be achieved with the connection pipe 204 even slanted, so that the suction member offers improved cleaning operability. In addition, since the suction member body 201 will never be inverted, there is no possibility of erroneous use of the suction 15 member such as cleaning with the air inlets 205 oriented upward.

When the suction member is push-pull operated on the surface for cleaning, the rotatable members 219 rotate thereby moving the suction member body 201. Since the 20 suction member body 201 has the connection pipe 204 in a central portion thereof and supports the rotatable members 219 for rotation, the suction member is improved in balance a-d mobility and hence enjoys improved cleaning operability.

S 25 When a relatively hard surface for cleaning is to be cleaned, only the projections formed on the opposite ends of each rotatable member 219 are brought into contact with the surface for cleaning. Accordingly, there is no possibility that the rotatable members 219 are radially inwardly deformed and contact the suction member body 201 thereby increasing the frictional resistance therebetween, or that the peripheral edge of each small perforation or each opening 222 is caught by the peripherl edge of any air inlets 206 of the suction member body 201 to cause faulty rotation of the rotatable members 219. Further, the annular projections 223 of the rotatable members 219 are made larger in outer diameter than the bulged portion 221 of the suction member body 201, with the result that 17 zy* i of ft ft..

ft ft. ft ft.

ft* f ft.

4ft ft ft' f k f 4 t f the friction between the bulged portion 221 of the suction member body 201 and the surface for cleaning is made small thereby keeping the improved mobility of the suction member. Furthermore, since the rotatable members 219 are supported by the first, second, third and fourth convexes 207, 208, 209 and 214, there is a reduced frictional resistance between the rotatable members 219 and the suction member body 201 and, hence, the rotatable members 219 rotate with ease thereby assuring the suction member of improved mobility and cleaning operability.

Although the projections 223 formed in opposite end portions of each rotatable member 219 intend to deform toward the suction member body 201 when they are pressed against the surface for cleaning, the provision of the first and fourth convexes 207 and 214 -abutting or approximating the inner surface of each rotatable member 219 at positions substantially opposing the projections 223 of the suction member body 201 prevents the inner surface of each rotatable member 219 from contacting the 20 outer surface of the suction member body 201, so that the rotatability of each rotatable member 219 is kept satisfactory.

Dust adhering to the surface for cleaning is drawn/ into the suction member, body 201 through a multiplicity of perforations and a j plurality of openings 222 of the rotatable members 219 and collected into the vacuum cleaner through the connection pipe 204, extension pipe and suction hose.

Since each rotatable member 219 defines the 30 openings for communication with the air inlets 206 of the suction member body 201, relatively large dust including hair and waste thread can assuredly collected at positions where the openings 222 come to coincide with the air inlets 206 of the suction member body 201 as the rotatable members 219 rotate.

When a relatively soft surface such as curtain or bed sheet is to be cleaned, the suction force of the vacuum cleaner causes the surface for cleaning to be 18 attracted by a lower portion of the rotatable members 219, namely the portion opposite to the air inlets 206 of the suction member body 201. However, since the rotatable members 219 are kept spaced apart from the outer surface of the suction member body 201 by the first, second, third and fourth convexes 207, 208, 209 and 214, there is no possibility that the air inlets 206 are covered with the surface for cleaning and, hence, the dust collectability of the suction member can be maintained. Further, although the surface for cleaning attracted to the rotatable members 219 might be drawn in from any opening 219 of the rotatable members 219 to any air inlet 206 of a:ai the suction member body 201, the space provided between :the suction member body 201 and the rotatable members 219 prevents the surface for cleaning from penetrating into any air inlet 206. Therefore, the rotatability of the rotatable members 219 will never be degraded.

Where the. multiplicity of perforations of the rotatable members 219 catch hair and the like, it is 20 possible to remove the support members 224 from the bearing members 215 to detach the rotatable members 219 from the suction member body 201 for washing the rotatable members 219 with water or the like. Alternatively, where hair or the like is caught between adjacent air inlets 206 25 and dust cumulatively adhering to the hair turns into a mass within the suction member body 201, a screw driver or the like is inserted into each engagement hole 216 of the suction member body 201 to disengage the corresponding engagement claw 217 of the bearing member 215 from the engagement hole 216 thereby detaching the bearing member 215 from the suction member body 201. Thus, the inside of the suction member body 201 can be cleaned. In this way the bearing members 215 attached to the opposite ends of the suction member body 201 can be detached with ease and, hence, the maintenability of the suction member body 201 is improved.

The cover 210 of the embodiment shown in Figs.

to 21 is formed of a synthetic resin such as ABS resin.

J9 Since the cover 210 contacts the surface for cleaning and might be degraded in mobility due to the frictional resistance therebeween, it is desired that the cover 210 be formed of a material of low frictional resistance such as a polyacetal resin or an olefin resin. The pressing force of the suction member against the surface for cleaning generated by the user push-pull operating the suction member during cleaning is the strongest in the vicinity of the connection pipe 204 and, therefore, the contacting force between the fourth convexes 214 and the rotatable members 219 becomes the strongest. Accordingly, the fourth convexes 214 are likely to be abraded during long time use. However, by forming the cover 210 with the material of low frictional resistance, the frictional 15 resistance between the fourth convexes 214 of the cover 210 and the rotatable members 219 are reduced thereby improving the mobility of the suction member.

Although the first, second, third and fourth annular convexes 207, 208, 209 and 214 are formed on 20 the outer surface of the suction member body 201 as approximating or abuttingly supporting the rotatable members 219 to reduce the friction resistance of the rotatable members 219 against rotation, convexes 227 might be formed only on lower surfaces of the suction member 25 body 201 as shown in Fig. 22. With this arrangement, it is possible to assuredly provide a space between the rotatable members 219 and the suction member body 201 thereby keeping the dust collectability of the suction member satisfactory, and to reduce the contact area between the rotatable members 219 and the convexes thereby decreasing the frictional resistance of the rotatable members 219 against rotation. Thus, the suction member offers improved mobility and cleaning operability, Although the first, second, third and fourth convexes 207, 208, 209 and 214 are formed integrally with the outer periphery of the suction member body 201, first, third and fourth convexes 228, 229 and 230 together with second convexes (not shown) might be formed of a material of low frictional resistance, for example, a low frictional resistance resin such as a polyacetal resin or an olefin resin and bonded to the suction member body 201 as shown in Fig. 23. This arrangement allows the rotatable members 219 to have a low frictional resistance against rotation, thereby improving the mobility and cleaning operability of the suction member.

Alternatively, instead of the first, second, third and fourth convexes 207, 208, 209 and 214 formed on the outer surface of the suction member body 201, annular convexes 231, 232 and 233 might be formed on the inner surfaces of the rotatable members 219 as abutting the outer surface of the suction member body 201 as shown in Fig. 24.

15 Further, although the embodiment shown in Fig.

to 21 is of the arrangement wherein the engagement claws 217 of each bearing member 215 can be disengaged from the engagement holes 216 of the tubular member 202 with use of a screw driver or the like, a pair of 20 projecting portions 234 adapted to disengange the engagement claws 217 from the engagement holes 216 might be formed on the inner surface of each rotatable member 219 at positions corresponding to the engagement holes 216. Each of the projecting portions 234 is shaped 25 semicircular, and each engagement claw 217 defines a recess 235 into which the tip of the corresponding projecting portion 234 is adapted to fit and has slopes 2.36 on opposite sides of the recess 235, while each engagement hole 216 has slopes 216 on the outer periphery side of the suction member body 201 along the circumferential direction thereof. With this arrangement, each rotatable member 219 is rotated to a position where each projecting portion 234 coincides with the corresponding engagement hole 216 and is inwardly deformed to disengage the engagement claw 217 from the engagement hole 216, followed by further rotating the rotatable member 219. Since the tip of the projecting portion 234 is being fitted into the recess 235 of the engagement claw 1 T f 5 9* U. S

OS

5 *55 217 at this time, the bearing member 215 rotates as the corresponding rotatable member 219 rotates and, accordingly, one of the slopes 236 of the engagement claw 217 is guided onto the peripheral edge of the engagement hole 216 to deform the engagement claw 217 inwardly of the tubular member 202 while the projecting portion 234 is guided onto one of the slopes 237 to disengage from the recess 235 of the engagement claw 217. In this condition, by pulling the rotatable member 219 longitudinally of the suction member body 201 while pressing the rotatable member 219 inwardly, the bearing member 215, rotatable member 219 and support member 224 in assembled condition can be removed from the suction member body 201, thus assuring improved mainteinability of the suction member 15 body 201 and rotatable members 219.

Although each of the bearing members 215 is formed of a synthetic resin such as ABS resin, it might be formed of a material of low frictional resistance, for example, a low frictional resistance synthetic resin such as a polyacetal resin or an olefin resin to reduce the frictional resistance between the support member 218 of each bearing member 215 and the shaft portion 220 of each rotatable member 219, thereby improving the mobility and cleaning operability of the suction member.

25 As in the embodiment shown in Fig. 27, each bearing member might be formed of a material of low frictional resistance, for example, a low frictional resistance synthetic resin such as a polyacetal resin or an olfin resin while being formed with an annular convex 239 abutting or approximating a portion adjacent the projection 223 at one end of the corresponding rotatable member 219. This allows the frictional resistance between the bearing members and the rotatable members 219 to decrease thereby improving the mobility and cleaning operability of the suction member.

Further, although the first, second, third and fourth convexes 207, 208, 209 and 214 are formed on the outer surface of the suction member body 201 as

S.

@595 .2 approximating or abutting the inner surfaces of the rotatable members 219, each rotatable member 219 might be formed with an annular convex 240 on the inner surface thereof as approximating or abutting the outer surface of the corresponding bearing member 215 and annular convexes 241 and 242 on the inner surface thereof as approximating or abutting the outer surface of the suction member body 201, as in the embodiment showrn in Fig. 28.

In the embodiment shown in Fig. 28, each bearing member 215 is preferably made of a material of low frictional resistance, for example, a low frictional resistance synthetic resin such as a polyacetal resin or •i °an olefin resin to decrease the frictional resistance between the bearing member 215 and the corresponding rotatable member 219, thereby improving the mobility and cleaning operability of the suction member.

To be described with reference to Figs. 29 to 31 is another embodiment of the present invention. It is to be noted that in these figures the parts corresponding to 20 those in the foregoing embodiments are denoted by like numerals as used in the foregoing embodiments and description on such parts are omitted herein. The suction member shown includes bearing portions 243 formed on the outer surface of a tubular member 202 at opposite ends thereof and each having a diameter smaller than the outer diameter of the tubular member 202, each bearing portion 243 supporting a shaft portion 244 formed at one end portion of the corresponding rotatable member for rotation. A closing plate 245 of a synthetic resin such as ABS resin closes each open end of the tubular member 202 and has a pair of engagement claws 247 which disengageably engages a pair of engagement holes 246 defined in each of the opposite end portion of the tubular member 202 from the inside of the tubular member 202.

Thus, the closing plate 245 is removably attached to each open end of the tubular member 202 by the engagement of the engagement claws 247 with the engagement holes 246.

L4 When the closing plate 245 is attached to each end portion 23of the tubular member 202, the corresponding rotatable member 219 iA adapted to be rotatably supported on the bearing portion 244. The closing plate 245 is made larger in outer diameter than the projection 260 formed at one end of each rotatable member 219 so as not to contact a surface for cleaning and thereby not to impede a movement of the suction member.

Each of the engagement claw 247 defines a recess 248 into which the tip of a projecting portion 250 to be described later is fitted and has slopes 249 on opposite sides thereof. A pair of projecting portions 250 each shaped substantially arcuate are formed on the inner surface of each rotatable member 219 at positions coincident with the engagement holes 246 so as to serve as 15 disengaging portions.

When each rotatable member 219 is to be removed, the rotatable member 219 is rotated to a position where the projecting portions come to coincide with the Sengagement holes 246 and is inwardly deformed to disengage 20 the engagement claws 247 from the engagement holes 246, and is further rotated while being inw idly deformed.

a: -:Since the tip of each projecting portion 250 is being *#ago*fitted into the recess 248 of the corresponding engagement claw 247 at this time, the closing plate 245 rotates as 25 the corresponding rotatable member 219 rotates and, accordingly, one of the slopes 236 of the engagement claw 247 is guided onto the peripheral edge of the engagement hole 246 to deform the engagement claw 247 inwardly of the tubular member 202 while the projecting portion 250 is guided onto one of the slopes 251 to disengage from the recess 248. In this condition, by pulling the rotatable member 219 longitudinally of the suction member body 201 while pressing the rotatable member 219 inwardly, the closing plate 245 and the rotatable member 219 can be removed from the suction member body 201.

The embodiment shown in Figs. 29 to 31 can be constructed of a reduced number of parts as compared to O the foregoing embodiments and hence can be simplified in structure.

Although each bearing portion 243 is provided to the tubular member 202, it might be provided to each closing plate 245 as in the embodiment shown in Fig. 32.

To be described with reference to Figs. 33 to is still another embodiment of the present invention. It is to be noted that in these figures the parts corresponding to those in the foregoing embodiments are denoted by like numerals as used in the foregoing embodiments and description on such parts are omitted herein.

The suction member shown includes rotatable members 319 covering the outer periphery of a tubular member 302 on both sides thereof, each of the rotatable members 319 having at one end thereof a shaft portion (not shown in Figs. 33 to 35 but refer to numeral 220 in Fig. 15) rotatably supported around the outer surface of a support portion (not shown in Figs. 33 to 35 but refer to numeral 218 in Fig. 15) of a bearing member 315. The 20 rotatable members 319 are formed of a synthetic resin such as a polypropylene resin which is different from the materials (for example, ABS resin) of the tubular member 302. cover 310 and bearing members 315, and contains an antibacterial agent. In this embodiment the antibacterial agent is contained in an amount of 0.1 to 0.2 by weight, taking account for its antibaterial activity and a decrease in the strength of the synthetic resin due to the admixture of the antibacterial agent. The other end of each rotatable member 319 approximates a lateral side of a bulged portion 321 bulged circumferentially outwardly of central portions of the tubular member 302 and cover 310, thereby preventing dust from penetrating between the aforesaid other end of the rotatable member 319 and the lateral side of the bulged portion to cause faulty rotation of the rotatable member 319 or to generate abnormal noise due to friction. Each of the rotatable members 319 defines a plurality of elongated openings 322 I "L I so that the longitudinal axes thereof cross the rotational coss .r i Z5 axis, the longitudinal axis of the suction member body 301. The length of each opening 322 in the rotational direction of the rotatable member 319 is made larger than the circumferential pitch of air inlets 306 defined in the suction member body 301 so that the openings 322 are always in communication with the air inlets 306 to assuredly collect hair, waste thread and the like. Each rotatable member 319 has a pair of annular projections 323 formed integrally therewith on the outer periphery at opposite ends thereof. The projections 323 are located at positions adjacent and corresponding to first convex 3 )7 and the combination of second convex 308 and fourth convex 314, each of the projections 323 being made larger in diameter than the bulged portion 321 of the tubular member 15 302.

Since the peripheral edge of each opening 322 defined in each rotatable member 319 is formed as crossing the peripheral edge of each air inlet 306 defined in the suction member body 301, the peripheral edge of each 20 opening 322 will never be caught by the peripheral edge of each air inlet 306 and, hence, the rotatable member 319 enjoys improved rotatability. In cleaning a surface of an Go": soft and relatively thick object such as bedclothes or blanket, each rotatable member 319 is pressed against the So. 25 surface for cleaning and hence is inwardly deformed, with the result that the inner periphery of the rotatable member 319 contacts a lower portion of the outer periphery of the suction member body 301. At this time, where the peripheral' edges of the openings 322 are parallel to the peripheral edges of the air inlets 306, the peripheral edges of the openiligs 322 is likely to be caught by the peripheral edges of the air inlets 306 over a large area with the rotation of the rotatable member 319, whereby the rotation of the roatable member 319 is impeded to degrade the mobility of the suction member. In this embodiment, however, the peripheral edges of the openings 322 of each rotatable member 319 are formed as crossing those of the air inlets 306 of the suction member body 301 thereby -1minimizing the possibility of the openings 322 being caught by the air inlets 306. Thus, the suction member according to this embodiment offers improved mobility.

Further, since the openings 322 of each rotatable member 319 and the air inlets 306 of the suction member body 301 are formed in elongated shape and the longitudinal axes of the openings 322 and those of the air inlets 306 cross each other, the openings 322 continuously communicate with the air inlets 306 to enable continuous collection of hair, waste thread and the like.

Although in the embodiment shown in Figs. 33 and 34 the longitudinal axis of each air inlet 306 of the suction member body 301 extends substantially parallel to the longitudinal axis of the suction member body 301 while the longitudinal axis of each opening 322 crosses that of each air inlet 306, such an arrangement might be employed that the longitudinal axis of each air inlet 306 of the suction member body 301 crosses the longitudinal axis of the suction member body 301 while the longitudinal axis of 20 each opening 322 of the rotatable members 319 extends substantially parallel to that of the suction member body S 301, so that the longitudinal axis of the opening 322 and that of the air inlet 306 cross each other.

As has been described, the present invention 25 provides a suction member for use with a vacuum cleaner which exhibits improved cleaning operability and cleaning performance. Further, the present invention makes it possible to improve the mainteinability of the rotatable members and suction member body. Furthermore, the connectin pipe of the suction member is securely held by the suction member body thereby improving the cleaning operability of the suction member.

While only certain presently preferred embodiments have been described in detail, as will be apparent with those familiar with the art, certain changes and modifications can be made without departing from the spirit and scope of the invention as defined by the following claims.

L-ii -i I i I

Claims

1. A suction member for use with a vacuum cleaner including a suction member body having an air inlet in a lower portion of the outer surface thereof and a rotatable member provided around at least a portion of the outer surface of the suction member body, wherein said rotatable member defines a multiplicity elongated openings.

2. A suction member according to claim 1 further including a multiplicity of perforations defined in the rotatable member, said rotatable member being removably attached to the suction member body.

3. A suction member body according to claim 1 or 2, wherein a connection pipe is to disposed substantially centrally of said suction member body for connection to the .mo vacuum cleaner, and the rotatable member is rotatably provided around the outer surface of the suction member body on both sides of said suction member body. S"

4. A suction member according to any one of claims 1 to 3, wherein a wheel is formed integrally with the rotatable member.

5, A suction member according to any one of claims 1 to 4 wherein the openings defined in the rotatable member are shaped substantially similar to the air inlet of the suction member body.

6. A suction member according to any one of claims 1 to 5, wherein the air inlet and the openings defined in the rotatable member are both in laterally elongated form.

7. A suction member according to any one of the preceding claims wherein ribs abutting the inner surface of the rotatable member are formed around the outer surface of the suction member body. -I L IL IICBII C~ -I I I -27-

8. A suction member according to any one of claims 1 to 6 wherein annular ribs abutting around the outer surface of the suction member body are formed on the inner surface of the rotatable member.

9. A suction member according to any one of the preceding claims wherein the suction member body has a flat portion defining an air inlet on a bottom portion thereof and curved portions at the front and rear ends thereof such that said suction member body is oval shaped in cross section.

A suction member according to any one of the preceding claims wherein bearing members are removably attached to end portions of the suction member body, and the 10 rotatable members are rotatably supported by the respective bearing members.

11. A suction member according to claim 10, wherein the rotatable members are removably supported by the respective bearing members.

12. A suction member according to claim 10 or 11, wherein the bearing members are formed of a material of low frictional resistance. i 15

13. A suction member according to any one of the preceding claims, wherein the suction member body comprises a tubular member which has substantially centrally thereof a support portion supporting the connection pipe and an opening on which the support portion faces, and a cover closing the opening of the tubular member, the connection pipe being held between the support portion and the cover.

14. A suction member according to any one of the preceding claims, wherein the rotatable member has at least one projecting portion on the outer surface thereof. A suction member according to any one of the preceding claims, wherein the openings include peripheral edges which cross that of the air inlet.

I, I I I I I -28-

16. A suction member according to any one of the preceding claims, wherein support members are removably attached to opposite ends of the suction member body for preventing the rotatable members from dropping out.

17. A suction member according to claim 16, wherein the rotatable members are each rotatably supported between the suction member body and each of the support members.

18. A suction member for use with a vacuum cleaner substantially as herein described with reference to Figures 1 to 6, 7 aa 8, 9 and 10, 11 to 14, 15 to 21, 22, 23, 24, 25 and 26, 27, 28, 29 to 31,32, 33 and 34 or Figure 35 of the accompanying drawings. SANYO ELECTRIC CO., LTD. 10 DATED this 28 Day of July, 1997 Attorney: JOHN B. REDFERN Fellow Institute of Patent Attorneys of Australia of SHELSTON WATERS 69 09 9o go* i, I I II sa~ I ~c Abstract of the Disclosure A suction member for use with a vacuum cleaner is provided which includes a suction member body having substantially centrally thereof a connection pipe to be connected to the vacuum cleaner air inlets defined in lower portions of the outer periphery of the suction member body on both sides of the suction member body and rotatable members defining a multiplicity of perforations and each rotatably provided around the outer periphery of the suction member body on either side of the suction member body The provision of the rotatable members defining the multiplicity of perforations and each rotatably provided around the outer periphery of the I. 'suction member body on either side of the suction member body allows the suction member body to exhibit improved *mobility and the suction member to enjoy improved cleaning operability. S ii IIL-~li