FR2872693A1 - SUCTION BRUSH FOR A VACUUM CLEANER AND A VACUUM CLEANER - Google Patents

Abstract

The present invention relates to a suction brush for a vacuum cleaner having a bottom plate (150) rotatably disposed under a cover (100) for contacting a cleaning surface. Even when the rear end of the suction brush separates from the cleaning surface during the cleaning operation, the bottom plate (150) remains in close contact with the cleaning surface by downward rotation, thereby improving cleaning efficiency.

Description

The present invention relates to a vacuum cleaner. In particular, the

  The present invention relates to an improved suction brush which adjusts to different characteristics of a cleaning surface, such as a

  carpet or floor, in order to improve cleaning efficiency and accuracy.

  A vacuum cleaner generally attracts dust and contaminants from a cleaning surface by using a suction force generated by driving a vacuum source disposed in a body of the vacuum cleaner. Referring to Figure 1, the vacuum cleaner comprises a vacuum cleaner body 10, a suction brush 30, and a connection path 20. The vacuum cleaner body 10 includes a motor (not shown) generating the force suction, and the suction brush 30 is provided with an inlet 39 which is vis-à-vis the cleaning surface, and through which dust is attracted. Dust drawn inwardly through the suction brush 30 flows through the connecting path 20 which leads to the vacuum body 10.

  The suction brush 30 includes an upper housing 34 and a lower housing 38 coupled through a plurality of bolts 40. The inlet 39 is formed at the lower housing 38, through which the dust is drawn inward from the cleaning surface. The connecting path 20 comprises a coupling 26 rotatably arranged in the suction brush 30, a continuation tube 24 which is arranged with the connector 26, and a suction hose 22 which is arranged in the extension pipe 24 at a first end, and which connects to the vacuum body 10 at the other end.

  When structured and configured as above, the cleaner draws dust and contaminants into the interior from the cleaning surface, such as a carpet or floor, while a user The vacuum cleaner moves the suction brush 30 in and out. However, as the suction brush 30 is moved back, the rear end of the suction brush 30 is often raised or spaced from the cleaning surface.

  With the trailing end of the suction brush 30 spaced from the cleaning surface, the lower portion of the lower housing 38 can not come into close contact with the cleaning surface, thereby causing a loss of suction force and deterioration of the cleaning efficiency. Also, when using the vacuum cleaner, the lower portion of the lower housing 38 often comes into direct contact with the cleaning surface, such as a floor, and thus scrapes that surface.

  In addition, since a plurality of bolts 40 are required to couple the upper housing 34 and the lower housing 38, manufacturing costs are increased and productivity is decreased due to the increased number of parts and the necessary assembly.

  To overcome the above disadvantages and problems of the usual arrangement, the invention aims to provide an improved suction brush for a vacuum cleaner, to improve cleaning accuracy and cleaning efficiency by contacting Tighten a bottom plate with the cleaning surface during the cleaning operation.

  Another object of the present invention is to provide an improved suction brush for a vacuum cleaner, which is capable of preventing a bottom plate from scraping the floor during the cleaning operation.

  A further object of the present invention is to provide a suction brush for a vacuum cleaner providing improved assembly without the use of fasteners such as bolts.

  For this purpose, the invention relates to a suction brush for a vacuum cleaner, characterized in that it comprises: - a covering, forming an envelope, and - a lower plate, located in the lower part of the brush this bottom plate being rotatably connected to the cover, the bottom plate having a suction port through which dust is drawn inward from a cleaned surface, the dust being drawn to the inside through a suction force generated by a vacuum source disposed in a body of the vacuum cleaner.

  According to other features of the invention: - the suction brush further comprises a resilient element disposed between the lower plate and the cover, for resiliently biasing an end of the lower plate in a predetermined direction; - The suction brush further comprises at least one lower plate stop disposed on at least one of the lower plate and the cover, to limit a rotation of the lower plate; the suction brush further comprises a lower plate fixing unit disposed between the cover and the bottom plate to selectively fix the bottom plate to the cover; the lower plate fixing unit comprises a foot switch rotatably disposed in the cover, this switch comprising an actuating bonnet extending through an opening in the cover, and a first part and a brush plate rotatably disposed in the cover, for rotation in association with the foot switch, and having a second locking portion for locking and unlocking the brush plate by cooperation with the first portion of the brush plate; locking; the suction brush further comprises a brush disposed at the level of the brush plate, which protrudes between the cover and the bottom plate according to the rotation of the brush plate; the suction brush further comprises foot switch support ribs formed at a distance from the cover, and having at least one pin hole which can be connected to an axis of rotation of the foot switch, and in that at least one of the foot switch rotation axis and the foot switch support ribs is provided with a slope such that the axis of rotation of the foot switch is compressed and inserted into the axis hole; the suction brush further comprises brush plate support ribs formed at the level of the cover, and having at least one hole of axis adapted to receive an axis of rotation of the brush plate, and in that at least one of the brush plate rotation axis and the brush plate support ribs is sloped so that the brush plate rotation axis is compressed and inserted into the hole axis; the suction brush furthermore comprises at least one lower plate rotation axis formed on at least one of the lower plate and the cover, and at least one hole having its own axis to cooperate with a corresponding axis of rotation, a slope being provided on the bottom plate rotation axis and / or in the vicinity of the axis hole, so that the lower plate rotation axis is compressed and inserted into the axis hole; the suction brush further comprises at least one wheel and a wheel shaft, at least one wheel receiving portion formed at the rear of the cover for receiving the or each wheel, and having a shaft hole through which the wheel shaft is inserted, - a locking projection formed on the wheel shaft, and - a locking recess formed at the shaft hole, corresponding to the locking projection, so that the wheel shaft is inserted into the shaft hole, and is locked with it.

  The invention also relates to a vacuum cleaner comprising a body, a vacuum source disposed in this body, and a suction brush, characterized in that the suction brush is as defined above.

  In accordance with the present invention, the suction brush for the vacuum cleaner has a cover, a bottom plate rotatably disposed at the cover, and desirably a lower plate fixing unit disposed between the cover and the cover. lower plate. The lower plate fixing unit preferably has a foot switch rotatably disposed in the cover, and a brush plate rotatably disposed in the cover for rotation in association with the foot switch.

  The foot switch advantageously has an operation button exposed to the outside, so that the user can turn the foot switch. A first locking portion is advantageously formed on both ends of the foot switch. A second locking portion is advantageously formed at the level of the brush plate in correspondence of the first locking portion.

  When the second locking portion advantageously rotates in association with the rotation of the first locking portion, the brush disposed at a front portion of the brush plate protrudes from the cover. An elastic member is advantageously interposed between the front portion of the brush plate and the bottom plate, so as to compress together the front portion of the brush plate and the bottom plate.

  The user can advantageously select a rotation mode and a stationary mode of the lower plate by means of the actuation button.

  If the user selects the rotation mode, the front end of the bottom plate is biased down by the elastic member, and the rear end is supported by the lower plate stop. When a rear side of the suction brush separates from the cleaning surface, the bottom plate rotates and comes into tight contact with the cleaning surface due to the suction force between the cleaning surface and the bottom plate, and the force applied to the suction brush by the user.

  When the user selects the stationary mode and rotates the foot switch using the actuation button, the first locking portion presses down on the second locking portion so as to rotate the brush plate downwardly. . The brush at the front end of the brush plate protrudes downwardly from the bottom plate.

  Since the suction brush is supported by a wheel at the rear end of the brush, the cleaning is performed with a predetermined space with respect to the cleaning surface. As a result, the cleaning surface, such as a floor, is not scraped.

  In addition, when the brush plate rotates downwards, the elastic member presses the front end of the bottom plate downward. Thus, the front end of the lower plate is supported by the elastic member, and the bottom plate stop at the rear end of the bottom plate is supported by the end of the plate support ribs. brush formed at the cover, so that the bottom plate is fixed relative to the cover.

  The foot switch, the brush plate and the lower plate advantageously respectively have an axis of rotation. The covering is advantageously mu-ni of support ribs having a hole of axis corresponding to the axis of rotation. The axis of rotation and the support ribs are advantageously inclined, so that the axis of rotation is inserted evenly into the axis hole. As constituted above, the assembly of the suction brush is improved, and the number of parts is reduced without having to use additional fastening means, such as bolts.

  These and other aspects and advantages of the present invention will become apparent and will be appreciated more readily from the following description of exemplary embodiments, with reference to the accompanying drawings, in which: FIG. 1 is a perspective view of a vacuum cleaner of the conventional type; FIG. 2 is a perspective view of a suction brush of a vacuum cleaner according to an embodiment of the present invention, representing the assembled suction brush; FIG. 3 is an exploded view of the suction brush of the vacuum cleaner shown in FIG. 2; FIGS. 4A and 4B are respectively partial views of the suction brush taken in along the lines 4A-4A and 4B-4B of Fig. 3; Fig. 5 is a perspective view of the bottom plate of the suction brush shown in Fig. 3; Fig. 6 is a view of the suction brush, taken in section lon 6 is a view of the suction brush, taken in section along the line VII-VII of FIG. 3; FIGS. 8A and 8B are side views of the suction brush of the vacuum cleaner according to one embodiment of the present invention, a portion of the suction brush being removed, and - Figures 9A and 9B are side views of the suction brush of the vacuum cleaner, according to an embodiment of the present invention, a part of the suction brush being removed.

  Reference will now be made in detail to the embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein like reference numerals indicate like elements throughout the drawings. Embodiments are described below to explain the present invention with reference to the drawings.

  Referring to FIGS. 2 and 3, a suction brush for an aspirator according to an embodiment of the present invention comprises an envelope covering 100 disposed in use in the upper part of the brush, a lower plate 150 fastened with rotatively under the cover 100, a lower plate fixing unit 300, a wheel 418 and a wheel shaft 420. The lower plate fixing unit 300 is rotatably disposed between the cover 100 and the bottom plate 150. The unit 300 selects between rotation and attachment of the bottom plate 150 depending on the type of cleaning surface, such as a carpet or floor. The wheel 418 and the wheel shaft 420 are rotatably attached to a rear end of the cover 100.

  The cover 100 is provided with a first bottom plate rotation axis 152 for fixing the bottom plate 150 at the inner side walls of the cover 100. Two lower plate support ribs 157 are provided with a second hole 158 of the bottom plate. lower plate axis corresponding to a second axis 156 of lower plate rotation (Figure 5). The second pins 156 of lower plate rotation are position-born coaxially with respect to the first axis 152 of lower plate rotation. A suction duct 108 is formed between the lower plate support ribs 157, and is in fluid communication with an extension pipe connector 500.

  An opening 104 is formed at an upper side of the cover 100 to receive an actuating button 314. Four brush support ribs 384 are formed in the cover 100 for rotatably securing a brush plate 350. Each brush plate support rib 384 is provided with a brush plate axis hole 380 (FIG. 4B). Two foot switch support ribs 336 are formed in the front portion of the brush plate support rib 384 for rotatably attaching a foot switch 310 to the cover 100.

  Each foot switch support rib 336 is provided with a foot switch shaft hole 334 into which is inserted a foot switch rotation shaft 330, which will be described below. At the rear end of the cover 100, a wheel receiving portion 400 is formed to receive the extension hose connector 500 and the wheel 418. The wheel receiving portion 400 is provided with a bore hole 410. wheel shaft for lateral insertion of the wheel shaft 420.

  An axial hole (not shown) is formed at a forward end of the extension pipe fitting 500, corresponding to the wheel shaft hole 410. The wheel shaft 420 penetrates through the axle hole and the wheel shaft hole 410, so that the extension hose connector 500 and the wheel 418 are rotatably attached at the cover 100.

  The two side walls of the lower plate 150 are provided with a first hole 154 of lower plate axis corresponding to the first axis 152 of lower plate rotation. The first bottom plate axis hole 154 coordinates with the first bottom plate rotational axis 152 formed at the inner side wall of the cover 100 so as to allow the bottom plate 150 to rotate relative to the bottom plate axis 150. at recovery 100.

  Accordingly, even when a backside under the suction brush moves away from the cleaning surface, the bottom plate 150 rotates relative to the cover 100 in close contact with the cleaning surface. At the lower portion of the bottom plate 150 is formed a dust transfer channel 172 leading to a suction port 176.

  A spacer 174 is disposed forward and rearward of the suction port 176 to maintain a gap between the bottom plate 150 and the cleaning surface. A rubber lip mounting portion 160 (FIG. 5) is formed at the rear end below the bottom plate 150, on which a rubber lip 168 is mounted to sweep dust and non-attracted contaminants into the housing. suction port 176, but passing to the rear end.

  The lower plate mounting unit 300 includes the foot switch 310 rotatably attached at the cover 100, and the brush plate 350 mounted in the cover 100 and under the foot switch 310 to rotate in association with the switch. footman 310.

  The foot switch 310 is provided with the operation button 314 at a first end. The operation button 314 is exposed through the opening 104 formed on the cover 100, so that the user of the vacuum cleaner can control the foot switch 310 from the outside. A first foot switch abutment 324 is formed at a rear end of the operation button 314 to prevent excessive rotation of the foot switch 310.

  A first locking portion 318 is formed at the other end of the foot switch 310, and extends downwardly from the operation button 314. The first locking portion 318 is a rib extending from the bottom of the actuator button 314 at the other end of the foot switch 310. Each end of the foot switch 310 is provided with a rotational axis 330 of foot switch.

  The foot switch rotation axis 330 is inserted into the foot switch shaft hole 100 of the cover 100, so that the foot switch 310 is rotatably attached at the cover 100. footswitch rotation 330 has a S-shaped, chamfering slope facilitating smooth insertion into foot switch shaft hole 334.

  A second foot switch abutment 328 is formed at a center of the foot switch 310 to connect both ends of the foot switch 310, and to prevent the foot switch 310 from rotating in the other direction. The second foot switch stop 328 prevents the foot switch 310 from rotating in the other direction at a predetermined angle by contacting the suction duct 108 formed at the cover 100.

  Two brush plate rotation axes 376 are formed at the rear end of the brush plate 350. The brush plate rotation axes 376 are inserted into the brush plate axis 380 hole 380 (FIG. 4B) formed at the cover 100, so that the brush plate 350 is rotatably attached at the cover 100.

  A pair of second locking portions 358 are formed at the front of the brush plate rotation axes 376, and engage the first locking portion 318. A resilient member receiving portion 210 is formed at the center level of the front portion of the brush plate 350 to receive an elastic member 200.

  The elastic member 200 is preferably a helical spring, but may be constituted by different elastic members having different elasticities. The elastic member 200 is securely inserted into the resilient member receiving portion 210 at its one end, and is secured at the front end of the bottom plate 150 at its other end, so as to recall the lower plate 150 in a direction A, visible to the left of FIG.

  The front end of the brush plate 350 is provided with a brush mounting portion 368 for mounting a brush 372. The brush 372 is mounted at the front end of the brush plate 372. brush 350, and moves vertically relative to the cover 100 according to the rotation of the brush plate 350. The brush plate 350 rotates when the first locking portion 318 compresses and rotates the second locking portion 358.

  Referring to Figure 3, the assembly of the suction brush is described according to an exemplary embodiment of the present invention. The foot switch 310 is fixed at the cover 100. The actuator button 314 of the foot switch 310 is inserted into the aperture 104, and the foot switch rotation shaft 330 is compressed and inserted into the hole 334 foot switch shaft 100 overlap.

  Then, the brush plate 350 is fixed at the level of the cover 100. The brush plate rotation axes 376 are compressed and inserted into the brush plate axis hole 380 (FIG. 4B) of the cover 100 The pair of second locking portions 358 of the brush plate 350 come into contact with the first locking portion 318 of the foot switch 310, the brush plate 350 being secured.

  The elastic member 200 is inserted into the elastic member receiving portion 210 of the brush plate 350. Finally, the bottom plate 150 is fixed at the cover 100. The attachment of the bottom plate 150 is accomplished by compressing and by inserting the first lower plate rotation pins 152 into the first lower plate axis holes 154 and the second lower plate rotation axes 156 into the second lower plate rotation axis holes 158, respectively.

  The elastic member 200 is compressed and comes into contact with the front end of the bottom plate 150 with a first end. Thus, the elastic member 200 recalls the front end of the bottom plate 150 to rotate in direction B, opposite to that A, and the rear end of the bottom plate is biased by a bottom plate stop 164 ( Figure 5). As structured and assembled, the bottom plate 150 maintains a level position with the cleaning surface.

  Referring to FIGS. 4A and 4B, the brush plate support ribs 384, the foot switch support ribs 336, the first lower plate rotation pins 152 and the second lower plate support ribs 157 each have a slope S, forming a chamfer. The slope S facilitates the regular insertion of the axes of rotation 152, 156, 337 and 376 in the corresponding axis holes 154, 158, 334 and 380, while the lower plate fixing unit 300 (FIG. fixed at the level of the covering 100.

  Referring to Fig. 5, the two second pins 156 of bottom plate rotation correspond to the first holes 154 of lower plate axis on the same axis. The suction port 176 is formed between the second pins 156 of lower plate rotation by penetration through the suction brush, through which dust is drawn inwardly. The suction port 176 communicates fluidly with the suction duct 108 (Figure 3).

  The rear end of the bottom plate 150 is provided with an upwardly protruding rubber lip mounting portion 160. Both ends of the rubber lip mounting portion 160 are provided with the lower plate stop 164 preventing the bottom plate 150 from rotating in the other direction B at a predetermined angle.

  Preferably, the rubber lip mounting portion 160 serves as a bottom plate stop 164, but it is possible to apply structural and configuration variations by using a separate member, since the function of the stop 164 bottom plate is fully filled. If the bottom plate 150 rotates in the other direction B by the predetermined angle, the bottom plate stop 164 comes into contact with the end of the brush plate support ribs 384 formed at the rear end 102 of the overlap 100 (FIG. 3), and thus the lower plate 150 is prevented from rotating further in the other direction B. FIG. 6 illustrates the foot switch 310 in association with the brush plate 350. Referring to FIG. 6, the first locking portion 318 rotates at a predetermined angle through the operation button 314, and between first and second positions P1 and P2.

  The first position P1 relates to a position of the first locking portion 318 when the foot switch 310 is prevented from rotating further in a first direction C. The foot switch is prevented from turning further in a first direction C of the the second stop 328 of the foot switch (FIG. 3) comes into contact with the suction duct 108.

  The second position P2 relates to a position of the first locking portion 318 when the foot switch 310 is prevented from rotating further in the other direction D. The foot switch 310 is prevented from turning farther towards the other direction D since the first foot switch stop 324 comes into contact with the cover 100.

  The second locking portion 358 has a first contact portion 360 contacting the first locking portion 318 when the first locking portion is in the first position P1, and a second contact portion 362 contacting the first portion locking 318 when the first locking portion 318 is in the P2 position. The second contact portion 362 is above the first contact portion 360, so that the end of the first locking portion 318, which is in contact with the first contact portion 360, comes into contact with the second portion contact 362 when the first locking portion 318 moves from the first position P1 to the second position P2. The first latch portion 318 presses down on the second latch portion 358, so that the brush plate 350 rotates downwardly about the brush plate rotation axes 376.

  Figure 7 illustrates the wheel shaft 420 attached at the cover 100. Referring to Figure 7, a first side of the wheel shaft 420 is provided with a locking projection 424 on the outer circumference of the wheel. Wheel shaft 420. A locking recess 414 is formed at an inner side of the wheel shaft hole 410 of the rear end of the cover 100, in correspondence with the lock projection 424.

  When shaped and configured as above, the extension hose connector 500 is inserted into the rear end of the cover 100, and the wheel 418 is secured in the wheel receiving portion 400. Then, the wheel shaft 420 is inserted into the wheel shaft hole 410 formed at the cover 100 and the extension pipe connector 500 (FIG. 3), thereby rotatably securing the extension pipe fitting. 500 and the wheel 418 at the cover 100.

  The locking projection 424 of the wheel shaft 420 is coupled to the locking recess 414 of the wheel shaft hole 410 of the cover 100. With this simple locking structure, the wheel 418 and the pipe connection 500 are rotatably connected to the suction brush. Thus, the brushing of the suction brush is improved, and the number of parts is reduced.

  As seen in Figs. 8A and 8B, the bottom plate 150 rotates in the rotation mode, or is stationary in the stationary mode relative to the cover 100. While cleaning the cleaning surface, such as a carpet, the user operating the vacuum cleaner in the rotation mode, since the bottom plate 150 is not in tight contact with the cleaning surface, since the rear end of the suction brush is spaced from the cleaning surface. Accordingly, the user selects the rotation mode to obtain the tight contact of the bottom plate 150 with the cleaning surface.

  The bottom plate 150 rotates relative to the cover 100 in the rotation mode even if the rear end of the suction brush is spaced from the cleaning surface. On the contrary, the cleaning surface, such as a floor, can be scraped due to direct contact with the bottom plate 150. To maintain a proper gap between the bottom plate 150 and the cleaning surface to avoid scraping, the user operates the vacuum cleaner in the stationary mode by having the brush 372 extending downward from the front end of the suction brush, and having the front end of the suction brush against the cleaning surface, and the rear end of the suction brush supported by the wheel 418.

  Fig. 8A shows the rotation mode of the lower plate 150 with respect to the cover 100, and Fig. 8B shows the stationary mode. Referring to Fig. 8A, the second foot switch stop 328 (Fig. 3) is biased by suction conduit 108 (Fig. 3), and is prevented from rotating in direction C (Fig. 6). The first latch portion 318 at both ends of the foot switch 310 engages the first contact portion 350 of the second latch portion 358 formed at both sides of the brush plate 350.

  The front end of the bottom plate 150 is biased downwardly by the resilient member 200, and the trailing end is supported due to a contact of the lower plate stop 164 with the end end of the ribs 384 of the brush plate holder. The front end of the brush plate 350 is biased upwardly by the resilient member 200, and the rear end is supported since the first contact portion 360 of the second lock portion 358 is supported by the first locking portion 318.

  When the cleaner operates in rotation mode on the cleaning surface such as a floor, the user presses on the rear end of the operation button 314 and switches to stationary mode. Referring again to FIGS. 8A and 8B, the first locking portion 318 formed at the first end of the foot switch 310 and under the actuating button 314 rotates downwardly about the switch rotation axis 330. on foot (Figure 3).

  The first locking portion 318 compresses the second locking portion 358 while moving from the first contact portion 360 of the second locking portion 358 to the first contact portion 362. Thus, the brush plate 350 turns to the bottom around the axes of rotation 376, so that the brush 372 moves and projects downward from below the bottom plate 150.

  The elastic member 200, which is disposed at the front end of the brush plate 350, and which recalls the brush plate 350 upward, is compressed due to the moment transferred from the first part. The elastic member 200 being compressed, the front end of the lower plate 150 receives a larger recovery force directed downwardly in the rotation mode.

  As a result, the lower plate 150 becomes stationary, since the front end is biased by the compressed elastic member 200 with a larger recovery force than the rotation mode, and the rear end is fixed, since the plate abutment The lower end 164 is supported by the end end of the brush plate support ribs 384. As a result, ground scraping is avoided in the stationary mode via the bottom plate 150.

  Figs. 9A and 9B are views of the bottom plate 150 rotating in the rotation mode. Figure 9A shows that the rear end of the suction brush is in complete contact with the cleaning surface. The lower plate 150 is biased downwardly by the elastic member 200 at the front end, and is supported at the rear end by the bottom plate stop 164 engaging the terminal end of the ribs. 384 of brush plate support. Thus, the bottom plate 150 is level with the cleaning surface.

  FIG. 9B illustrates that the rear end of the suction brush is spaced from the cleaning surface due to rotation of the suction brush at a certain angle 9. The force applied to the suction brush by the The user is transferred to the elastic member 200 via the cover 100, the foot switch 310 and the brush plate 350.

  Such a force is applied in a direction of compression of the elastic member 200 downwards. A force of the lower plate 150 adhering to the cleaning surface via the suction force results in a clockwise moment about the axes of rotation 152 and 156. Such a moment compresses upward the elastic member 200 biased against the front end of the bottom plate 150.

  Therefore, the force of the bottom plate 150 compressing the elastic member 200 upward is greater than the compressive force of the elastic member 200 downward, so that the bottom plate 150 rotates in the direction of the clockwise and stay level with the cleaning surface. Even when the rear end of the suction brush separates from the cleaning surface due to the difference between the direction of the force caused by the user on the suction brush and the direction of displacement of the suction brush, the bottom plate 150 can remain in tight contact with the cleaning surface, thereby improving the cleaning efficiency.

  When the rear end of the suction brush returns to its original position after being separated from the cleaning surface, the bottom plate 150 rotates counterclockwise through the resilient member 200 pressing down on the front end of the bottom plate 150. The bottom plate 150 rotates until the bottom plate stop 164 comes into contact with the end end of the plate support ribs 384. brush 384, to return to its original position as shown in FIG. 9A.

  As a result of the foregoing, even if the rear end of the suction brush is spaced from the cleaning surface, the tight contact with the cleaning surface is maintained, thereby improving the cleaning efficiency. When cleaning on the cleaning surface such as the floor, the user changes to stationary mode. Then, a proper gap is maintained between the cleaning surface and the bottom plate 150 to prevent scraping of the cleaning surface. This is because the brush 372 moves and protrudes downwardly from the bottom plate 150, and supports the front end of the suction brush, and the rear end is supported by the wheel 418.

  As a result, the assembly of the suction brush portions improves without the need for fastening means such as bolts, particularly since each axis of rotation and each axis hole is provided with corresponding slopes. In addition, the lack of fastening means reduces the number of parts required.

  Although the exemplary embodiments of the present invention have been described, further variations and modifications of the embodiments may occur to those skilled in the art after learning the basic concepts of the present invention. Therefore, it should be understood that the appended claims should be construed to include all the above embodiments, and all such variations and modifications that may fall within the spirit and scope of the present invention.

Claims (1)

  1. suction brush for a vacuum cleaner, characterized in that it comprises: - a covering (100), forming an envelope, and - a lower plate (150), located in service at the bottom of the brush, this plate lower plate being rotatably connected to the cover (100), the lower plate (150) having a suction port (176) through which dust is drawn inward from a cleaned surface, the dust being drawn inward by a suction force generated by a vacuum source disposed in a body of the vacuum cleaner.   2. suction brush according to claim 1, characterized in that it further comprises a resilient element (200) disposed between the lower plate (150) and the cover (100), in order to resiliently recall an end of the lower plate (150) in a predetermined direction.   3. suction brush according to claim 2, characterized in that it further comprises at least one abutment (164) of lower plate, disposed on at least one of the lower plate (150) and the cover (100). to limit a rotation of the lower plate (150).   A suction brush according to any one of claims 1 to 3, characterized in that it further comprises a lower plate fixing unit (300) disposed between the cover (100) and the lower plate (150) for attaching the bottom plate (150) to the cover (100) selectively.   Suction brush according to claim 4, characterized in that the lower plate fixing unit (300) comprises: - a foot switch (310) rotatably disposed in the cover (100), this switch ( 310) comprising an actuating button (314) extending through an aperture (104) in the cover (100) and a first locking portion (318) and a brush plate (350). ) rotatably disposed in the cover (100), for rotating in association with the foot switch (310), and having a second locking portion (358) for locking and unlocking the brush plate (350) in cooperation with the first locking portion (318).   6. suction brush according to claim 5, characterized in that it further comprises a brush (372) disposed at the level of the brush plate (350), which projects between the cover (100) and the lower plate (150) according to the rotation of the brush plate (350).   7. Suction brush according to one of claims 4 to 6, characterized in that it further comprises foot switch support ribs (336) remotely formed on the cover (100), and having at least one pin hole (334) connectable to an axis of rotation (330) of the foot switch (310), and in that at least one of the axis of rotation (330) of the foot and the foot switch support ribs (336) are provided with a slope (S) such that the axis of rotation (330) of the foot switch (310) is compressed and inserted into the axis hole ( 334).   8. Suction brush according to any one of claims 4 to 7, characterized in that it further comprises ribs (384) of brush plate support formed at the cover (100), and having at least an axis hole (380) adapted to receive an axis of rotation (376) of the brush plate (350), and in that at least one of the axis of rotation (37 6) of the brush plate and the brush plate support ribs (384) are provided with a slope (S), so that the brush plate rotation axis (376) is compressed and inserted into the pin hole (380) .   9. suction brush according to any one of the preceding claims, characterized in that it further comprises: - at least one axis of rotation (152, 156) of lower plate formed on at least one of the lower plate (150) and the covering (100), and - at least one axis hole (154, 158) adapted to cooperate with a corresponding axis of rotation (152, 156), - a slope (S) being provided on the lower plate axis of rotation (152, 156) and / or in the vicinity of the pin hole (154, 158), so that the bottom plate axis of rotation (152, 156) is compressed and inserted into the hole axis (154, 158).   10. suction brush according to any one of the preceding claims, characterized in that it further comprises: - at least one wheel (418) and a wheel shaft (420), - at least one part (400) wheel receiving means formed at the rear of the cover (100) for receiving the or each wheel (418), and having a shaft hole (410) through which the wheel shaft (420) is inserted, - a locking projection (424) formed on the wheel shaft (420), and - a locking recess (414) formed at the shaft hole (410), corresponding to the locking projection (424), so that the wheel shaft (420) is inserted into the shaft hole (410), and is locked therewith.   11. Vacuum cleaner comprising a body, a vacuum source disposed in this body, and a suction brush, characterized in that the suction brush is in accordance with any one of the preceding claims.