Brush telescopic lifting type sweeper side sweeping module and sweeper

Abstract

The utility model discloses a bristle telescopic lifting type sweeper side sweeping module and a sweeper. The side sweeping module of the sweeper with the telescopic lifting type bristles comprises a gear box, a driving motor, a first rotating shaft, a second rotating shaft, a third rotating shaft, a rotating sleeve, a damping shaft, an output gear, a first rotating gear, a second rotating gear, a third rotating gear, a fourth rotating gear, a fifth rotating gear, a sixth rotating gear, a lifting sleeve, a bristle mounting cylinder and the bristles. An internal thread is arranged on the inner wall of the rotating sleeve, an external thread is arranged on the outer wall of the lifting sleeve, a damping rubber ring is arranged between the damping shaft and the inner wall of the lifting sleeve, a storage sleeve is arranged at the bottom of the gearbox, a bristle shrinking notch is formed in the storage sleeve, and a bristle lifting inclined block is arranged at the bristle shrinking notch. The side sweeping module of the sweeper with the telescopic lifting type bristles and the sweeper have the advantages of being simple in structure and easy to assemble, the production process can be simplified during implementation, the production cost can be reduced, the bristles can be stored during use, and the use experience is improved.

Description

Technical Field

[0001] The utility model relates to the field of floor sweepers, in particular to a side sweeping module of a floor sweeper with telescopic and lifting bristles and a floor sweeper. Background Art

[0002] With the improvement of people's living standards, intelligent household appliances have increasingly entered people's living and working environments. Among them, floor sweepers are widely used, which can intelligently perform activities such as floor sweeping, greatly reducing people's labor intensity and saving labor costs.

[0003] In a floor sweeper, the side sweeping module is one of the core components. The side sweeping module in the floor sweeper is used to perform the floor sweeping task at the corners, which plays an important role in the comprehensive performance of the floor sweeper. In existing floor sweeper products, the side sweeping module generally has a lifting function and can perform lifting activities according to needs to adapt to different working scenarios. However, the side sweeping modules of existing floor sweepers generally have problems such as complex structure, difficult assembly, and complex production process, which in turn lead to high production costs, low production efficiency, and affect the performance stability of the floor sweeper; moreover, the bristles of the existing side sweeping modules do not have a storage function, and the bristles will droop when the side sweeping module is in the lifted state, affecting the normal operation of the floor sweeper and resulting in poor user experience.

[0004] In view of this, the purpose of the present utility model is to provide a new technical solution to solve the existing technical defects. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the present utility model provides a side sweeping module of a floor sweeper with telescopic and lifting bristles and a floor sweeper, which solves the technical defects of the existing products such as complex structure, complex process, high production difficulty, high cost, low efficiency, and the bristles cannot be stored easily affecting the use.

[0006] The technical solution adopted by the present utility model to solve its technical problems is:

[0007] A side sweeping module for a floor sweeper with telescopic and liftable bristles, comprising a gearbox. Inside the gearbox, there are a driving motor, a first rotating shaft, a second rotating shaft, a third rotating shaft, a rotating sleeve and a damping shaft. An output gear is arranged on the output shaft of the driving motor. A first rotating gear and a second rotating gear are arranged on the first rotating shaft. A third rotating gear and a fourth rotating gear are arranged on the second rotating shaft. A fifth rotating gear is arranged on the third rotating shaft. A sixth rotating gear is arranged on the rotating sleeve. The output gear meshes with the first rotating gear. The second rotating gear meshes with the third rotating gear. The fourth rotating gear meshes with the fifth rotating gear. The fifth rotating gear meshes with the sixth rotating gear. Inside the rotating sleeve, there is a lifting sleeve. The lower end of the lifting sleeve extends outside the gearbox and is provided with a bristle mounting cylinder. The bristle mounting cylinder is provided with circumferentially distributed bristles. The inner wall of the rotating sleeve is provided with internal threads. The outer wall of the lifting sleeve is provided with external threads adapted to the internal threads. The damping shaft extends into the interior of the lifting sleeve, and a damping rubber ring is arranged between the damping shaft and the inner wall of the lifting sleeve. The bottom of the gearbox is provided with a receiving sleeve. The receiving sleeve is provided with a bristle contraction notch, and a bristle lifting inclined block is arranged at the bristle contraction notch.

[0008] As a further improvement of the above technical solution, the bristle contraction notch is arranged at the bottom of the receiving sleeve. The bristle contraction notch forms a guiding inclined surface and a receiving arc surface at the bottom of the receiving sleeve. The bristle lifting inclined block is arranged at the lower end of the receiving arc surface.

[0009] As a further improvement of the above technical solution, the damping shaft is fixedly installed in the gearbox. At the lower end of the damping shaft extending into the inner wall of the lifting sleeve, there is an annular recess. The damping rubber ring is arranged at the annular recess, and the outer wall of the damping rubber ring is in frictional connection with the inner wall of the lifting sleeve.

[0010] As a further improvement of the above technical solution, the inner wall of the rotating sleeve is provided with a first limiting block, and the outer wall of the lifting sleeve is provided with a second limiting block cooperating with the first limiting block. When the lifting sleeve descends to the lowest point, the first limiting block and the second limiting block limit each other to restrict the relative rotation between the rotating sleeve and the lifting sleeve.

[0011] As a further improvement of the above technical solution, both the output gear and the first rotating gear are helical gears;

[0012] As a further improvement of the above technical solution, the first rotating gear and the second rotating gear together form a first double gear, and the third rotating gear and the fourth rotating gear together form a second double gear;

[0013] As a further improvement of the above technical solution, the sixth rotating gear and the rotating sleeve are integrally formed components.

[0014] As a further improvement of the above technical solution, the storage sleeve is provided with a storage step position on the inner wall of its lower part where the bristles contraction notch is opened, and the storage step position is used for storing the bristles.

[0015] As a further improvement of the above technical solution, the lifting sleeve includes an external thread portion and a connecting portion. The external thread is provided on the inner wall of the external thread portion. The lower end of the damping shaft extends into the inner cavity of the external thread portion. The connecting portion extends through from the lower end of the rotating sleeve and is fixedly connected to the bristle mounting cylinder.

[0016] As a further improvement of the above technical solution, the gearbox includes a lower box body and an upper box body. The storage sleeve and the lower box body are integrally formed;

[0017] As a further improvement of the above technical solution, the side wall of the lower box body is provided with a box body connection card, and the side wall of the upper box body is provided with a box body connection buckle that cooperates with the box body connection card. The box body connection buckle is buckled at the box body connection card to fixedly connect the upper box body and the lower box body.

[0018] As a further improvement of the above technical solution, the gearbox is provided with a rotating sleeve installation hole for the rotating sleeve to pass through. The lower end of the rotating sleeve passes through the rotating sleeve installation hole and extends to the bottom of the gearbox. A rotating sleeve limiting ring is provided inside the gearbox near the rotating sleeve installation hole. The outer wall of the rotating sleeve is provided with a limiting step that cooperates with the rotating sleeve limiting ring. The limiting step is cooperatively and limitatively installed at the rotating sleeve limiting ring. A rotating sleeve limiting sleeve is provided on the upper inner wall of the gearbox. The upper end of the rotating sleeve extends into the rotating sleeve limiting sleeve.

[0019] The present utility model also provides:

[0020] A floor sweeper, which includes the bristle telescopic and lifting type floor sweeper side sweeping module described above.

[0021] The beneficial effects of the present utility model are as follows: The present utility model provides a side sweeping module and a floor sweeper with telescopic and liftable bristles. The side sweeping module and the floor sweeper with telescopic and liftable bristles realize the lifting of the bristle mounting cylinder and the storage of the bristles through a damping shaft, a rotating sleeve, a lifting sleeve, and a storage sleeve. The contraction and lifting functions of the bristles can be realized through the bristle contraction notch and the bristle lifting inclined block. It has the characteristics of simple structure and low implementation cost, is easier to assemble, has lower production costs, and the product is more stable and reliable. When in use, the bristles can be stored, which can improve the use experience and the market competitiveness of the product is better.

[0022] In summary, the side sweeping module and the floor sweeper with telescopic and liftable bristles solve the technical defects of the existing products, such as complex structure, complex process, high production difficulty, high cost, low efficiency, and the bristles cannot be stored easily, which is likely to affect the use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0024] Figure 1 is the assembly schematic diagram of the side sweeping module of the floor sweeper with telescopic and liftable bristles in the present utility model;

[0025] Figure 2 is another assembly schematic diagram of the side sweeping module of the floor sweeper with telescopic and liftable bristles in the present utility model;

[0026] Figure 3 is Figure 2 the cross-sectional view in the A-A direction of

[0027] Figure 4 is the internal structure schematic diagram of the side sweeping module of the floor sweeper with telescopic and liftable bristles in the present utility model;

[0028] Figure 5 is the structure schematic diagram of the lower box body in the present utility model;

[0029] Figure 6 is the structure schematic diagram of the rotating sleeve in the present utility model;

[0030] Figure 7 is the structure schematic diagram of the lifting sleeve in the present utility model;

[0031] Figure 8 is the structure schematic diagram of the damping shaft in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The concept, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present utility model. In addition, all the connection / linkage relationships involved in the patent do not simply refer to the direct connection of components, but refer to the formation of a more optimal connection structure by adding or reducing connection accessories according to the specific implementation situation. Each technical feature in the creation of the present utility model can be interactively combined without conflicting with each other. Refer to Figure 1-8 .

[0033] A side sweeping module of a brush hair telescopic and lifting type floor sweeper, comprising a gear box 1. Inside the gear box 1, there are arranged a driving motor 2, a first rotating shaft 31, a second rotating shaft 32, a third rotating shaft 33, a rotating sleeve 5 and a damping shaft 7. An output gear 21 is arranged on the output shaft of the driving motor 2. A first rotating gear 41 and a second rotating gear 42 are arranged on the first rotating shaft 31. A third rotating gear 43 and a fourth rotating gear 44 are arranged on the second rotating shaft 32. A fifth rotating gear 45 is arranged on the third rotating shaft 33. A sixth rotating gear 46 is arranged on the rotating sleeve 5. The output gear 21 meshes with the first rotating gear 41. The second rotating gear 42 meshes with the third rotating gear 43. The fourth rotating gear 44 meshes with the fifth rotating gear 45. The fifth rotating gear 45 meshes with the sixth rotating gear 46. An elevating sleeve 6 is arranged inside the rotating sleeve 5. The lower end of the elevating sleeve 6 extends outside the gear box 1 and is provided with a brush hair mounting cylinder 9. The brush hair mounting cylinder 9 is provided with circumferentially distributed brush hairs 91. The inner wall of the rotating sleeve 5 is provided with internal threads 51. The outer wall of the elevating sleeve 6 is provided with external threads 61 adapted to the internal threads 51. The damping shaft 7 extends into the elevating sleeve 6 and a damping rubber ring (not shown in the figure) is arranged between the damping shaft 7 and the inner wall of the elevating sleeve 6. A receiving sleeve 8 is arranged at the bottom of the gear box 1. The receiving sleeve 8 is provided with a brush hair contraction notch 81. A brush hair lifting inclined block 82 is arranged at the brush hair contraction notch 82.

[0034] During specific applications, when the floor sweeper starts working and needs to use the side sweeping module to sweep the corners, the drive motor 2 starts working. The drive motor 2 drives the output gear 21 to rotate. The output gear 21 drives the first rotating gear 41 to rotate. The first rotating gear 41 drives the second rotating gear 42 to rotate. The second rotating gear 42 drives the third rotating gear 43 to rotate. The third rotating gear 43 drives the fourth rotating gear to rotate. The fourth rotating gear 44 drives the fifth rotating gear 45 to rotate. The fifth rotating gear 45 drives the sixth rotating gear 46 to rotate. The sixth rotating gear 46 drives the rotating sleeve 5 to rotate. Since the damping shaft 7 forms a damping contact with the lifting sleeve 6 through a damping rubber ring, when the rotating sleeve 5 rotates, due to the damping effect of the damping rubber ring on the lifting sleeve 6, the lifting sleeve 6 does not rotate synchronously with the rotating sleeve 5. At this time, since the rotating sleeve 5 and the lifting sleeve 6 are threadedly connected through the internal thread 51 and the external thread 61, the threaded connection structure formed by the external thread 61 and the internal thread 51 can drive the lifting sleeve 6 to descend, so that the brush mounting sleeve 9 and the brush 91 extend downward from the storage sleeve 8 and start the floor sweeping work. When it is necessary to store the brush 91, the above process operates in reverse to retract the brush mounting sleeve 9 and the brush 91 upward. During the upward storage process of the brush 91, since the brush contraction notch 81 is provided on the storage sleeve 8, the brush 91 can be smoothly stored inside the storage sleeve 8 through the brush contraction notch 81. When the brush 81 is stored into the storage sleeve 8 from the brush contraction notch 81, the brush lifting ramp 82 lifts the brush 91 to prevent the brush 91 from sagging and affecting the normal floor sweeping activity of the floor sweeper.

[0035] In this embodiment, the brush contraction notch 81 is provided at the bottom of the storage sleeve 8. The brush contraction notch 81 forms a guiding inclined surface 811 and a storage arc surface 812 at the bottom of the storage sleeve 8. The brush lifting ramp 82 is provided at the lower end of the storage arc surface 812. On the one hand, through the guiding inclined surface 811 and the storage arc surface 812, the brush 91 can be stored more smoothly, avoiding the situation of storage jamming and making the storage smoother. On the other hand, through the guiding inclined surface 811 and the storage arc surface 812, the brush 91 can also be protected to avoid damage to the brush 91.

[0036] In some embodiments, the damping shaft 7 is fixedly installed in the gearbox 1. An annular recess 71 is provided at the lower end of the inner wall of the lifting sleeve 6 where the damping shaft 7 extends into. The damping rubber ring is arranged at the annular recess 71, and the outer wall of the damping rubber ring is in frictional connection with the inner wall of the lifting sleeve 6. The damping shaft 7 can be fixedly connected to the gearbox 1 by screws. The gearbox is provided with a damping shaft installation groove which has a flat position inside, and a matching installation flat position is provided on the damping shaft, so as to realize radial fixed installation through the flat position.

[0037] In some embodiments, a first limiting block 52 is arranged on the inner wall of the rotating sleeve 5, and a second limiting block 62 matching with the first limiting block 52 is arranged on the outer wall of the lifting sleeve 6. When the lifting sleeve 6 descends to the lowest point, the first limiting block 52 and the second limiting block 62 limit each other to restrict the relative rotation between the rotating sleeve 5 and the lifting sleeve 6.

[0038] In specific applications, when the lifting sleeve 6 descends to a preset position, the relative rotation between the lifting sleeve 6 and the rotating sleeve 5 is restricted by the first limiting block 52 and the second limiting block 62. At this time, the lifting sleeve 6 descends to the lowest point, and the driving motor 2 continues to drive the rotating sleeve 5 to rotate. The rotating sleeve 5 drives the lifting sleeve 6 to rotate synchronously through the structure of the first limiting block 52 and the second limiting block 62, and the lifting sleeve 6 drives the brush mounting sleeve 9 and the brush 91 to rotate synchronously to realize the floor sweeping function. In this state, the lifting sleeve 6 rotates against the damping force of the damping rubber ring. In the technical solution of the present invention, the lifting and floor sweeping of the brush 91 can be realized by one driving motor 2, saving components, simplifying the structure, and reducing the implementation cost.

[0039] In some embodiments, both the output gear 21 and the first rotating gear 41 are helical gears; helical gears have better torque transmission performance and lower noise.

[0040] In some embodiments, the first rotating gear 41 and the second rotating gear 42 together form a first double gear, and the third rotating gear 43 and the fourth rotating gear 44 together form a second double gear; the sixth rotating gear 46 and the rotating sleeve 5 are integrally formed components.

[0041] In some embodiments, a storage stepped position 83 is provided on the inner wall of the lower part of the storage sleeve 8 where the brush contraction notch 81 is opened. The storage stepped position 83 is used to store the brush 91. When the brush 91 is in the storage state, the head of the brush 91 close to the brush mounting sleeve 9 is stored in the storage stepped position 83.

[0042] In some embodiments, the lifting sleeve 6 includes an external thread portion 601 and a connecting portion 602. The external thread 61 is provided on the inner wall of the external thread portion 601. The lower end of the damping shaft 7 extends into the inner cavity of the external thread portion 601. The connecting portion 602 extends through from the lower end of the rotating sleeve 5 and is fixedly connected to the brush mounting cylinder 9.

[0043] In some embodiments, the gearbox 1 includes a lower box body 11 and an upper box body 12. The receiving sleeve 8 and the lower box body 11 are integrally formed; a box body connection card 111 is provided on the side wall of the lower box body 11, and a box body connection buckle 121 that cooperates with the box body connection card 111 is provided on the side wall of the upper box body 12. The box body connection buckle 121 is buckled at the box body connection card 111 to fixedly connect the upper box body 12 and the lower box body 11. By providing the box body connection card 111 and the box body connection buckle 121, the quick assembly of the upper box body 12 and the lower box body 11 can be realized, and the production efficiency can be improved.

[0044] In some embodiments, a rotating sleeve mounting hole 101 for the rotating sleeve 5 to pass through is provided on the gearbox 1. The lower end of the rotating sleeve 5 passes through the rotating sleeve mounting hole 101 and extends to the bottom of the gearbox 1. A rotating sleeve limiting ring 102 is provided inside the gearbox 1 near the rotating sleeve mounting hole 101. A limiting step 53 that cooperates with the rotating sleeve limiting ring 102 is provided on the outer wall of the rotating sleeve 5. The limiting step 53 is cooperatively and limitedly mounted at the rotating sleeve limiting ring 102. A rotating sleeve limiting sleeve 103 is provided on the upper inner wall of the gearbox 1. The upper end of the rotating sleeve 5 extends into the rotating sleeve limiting sleeve 103. The rotational mounting of the rotating sleeve 5 is realized through the rotating sleeve mounting hole 101, the rotating sleeve limiting ring 102, and the rotating sleeve limiting sleeve 103.

[0045] Based on the above-mentioned side sweeping module of the sweeping robot with brush hair telescopic lifting, the present invention also provides:

[0046] A sweeping robot, which includes the side sweeping module of the sweeping robot with brush hair telescopic lifting.

[0047] The above is a specific description of the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A side sweeping module of a sweeping machine with telescopic and lifting bristles, characterized in that: The invention comprises a gear box (1), wherein a driving motor (2), a first rotating shaft (31), a second rotating shaft (32), a third rotating shaft (33), a rotating sleeve (5) and a damping shaft (7) are arranged inside the gear box (1); an output gear (21) is arranged on the output shaft of the driving motor (2); a first rotating gear (41) and a second rotating gear (42) are arranged on the first rotating shaft (31); a third rotating gear (43) and a fourth rotating gear (44) are arranged on the second rotating shaft (32); a fifth rotating gear (45) is arranged on the third rotating shaft (33); a sixth rotating gear (46) is arranged on the rotating sleeve (5); the output gear (21) and the first rotating gear (41) are meshed with each other; the second rotating gear (42) and the third rotating gear (43) are meshed with each other; the fourth rotating gear (44) and the fifth rotating gear (45) are meshed with each other. 45) are meshed with each other, the fifth rotating gear (45) is meshed with the sixth rotating gear (46), a lifting sleeve (6) is arranged inside the rotating sleeve (5), the lower end of the lifting sleeve (6) extends to the outside of the gear box (1) and is provided with a bristle mounting tube (9), the bristle mounting tube (9) is provided with circumferentially distributed bristles (91), the inner wall of the rotating sleeve (5) is provided with an internal thread (51), the outer wall of the lifting sleeve (6) is provided with an external thread (61) matched with the internal thread (51), the damping shaft (7) extends into the interior of the lifting sleeve (6) and a damping rubber ring is arranged between the damping shaft (7) and the inner wall of the lifting sleeve (6), a storage sleeve (8) is arranged at the bottom of the gear box (1), a bristle shrinkage notch (81) is opened on the storage sleeve (8), and a bristle lifting inclined block (82) is arranged at the bristle shrinkage notch (81).

2. The side sweeping module of a brush-retractable and lifting sweeping machine according to claim 1, characterized in that: The bristle shrinkage notch (81) is arranged at the bottom of the storage sleeve (8), and the bristle shrinkage notch (81) forms a guiding inclined surface (811) and a storage arc surface (812) at the bottom of the storage sleeve (8), and the bristle lifting inclined block (82) is arranged at the lower end of the storage arc surface (812).

3. The side sweeping module of a brush-retractable and lifting sweeping machine according to claim 1, characterized in that: The damping shaft (7) is fixedly installed in the gear box (1); the damping shaft (7) extends into the lower end of the inner wall of the lifting sleeve (6) and is provided with an annular recess (71); the damping rubber ring is arranged at the annular recess (71); the outer wall of the damping rubber ring is frictionally connected to the inner wall of the lifting sleeve (6).

4. The side sweeping module assembly of a sweeping machine with telescopic and lifting bristles according to claim 1, characterized in that: The inner wall of the rotating sleeve (5) is provided with a first limit block (52), and the outer wall of the lifting sleeve (6) is provided with a second limit block (62) cooperating with the first limit block (52). When the lifting sleeve (6) descends to the lowest point, the first limit block (52) and the second limit block (62) limit each other to limit the mutual rotation of the rotating sleeve (5) and the lifting sleeve (6).

5. The side sweeping module assembly of a sweeping machine with telescopic and lifting bristles according to claim 1, characterized in that: The output gear (21) and the first rotating gear (41) are both helical gears; The first rotating gear (41) and the second rotating gear (42) together form a first double gear, and the third rotating gear (43) and the fourth rotating gear (44) together form a second double gear; The sixth rotating gear (46) and the rotating sleeve (5) are integrally formed components.

6. The side sweeping module assembly of a sweeping machine with telescopic and lifting bristles according to claim 1, characterized in that: The storage sleeve (8) is provided with a storage step (83) on the lower inner wall of the storage sleeve (8) where the bristle shrinkage notch (81) is opened, and the storage step (83) is used to store the bristles (91).

7. The side sweeping module assembly of a sweeping machine with telescopic and lifting bristles according to claim 1, characterized in that: The lifting sleeve (6) comprises an external threaded portion (601) and a connecting portion (602), wherein the external thread (61) is arranged on the inner wall of the external threaded portion (601), the lower end of the damping shaft (7) extends into the inner cavity of the external threaded portion (601), and the connecting portion (602) extends from the lower end of the rotating sleeve (5) and passes through and is fixedly connected to the bristle mounting tube (9).

8. The side sweeping module assembly of a sweeping machine with telescopic and lifting bristles according to claim 1, characterized in that: The gear box (1) comprises a lower box body (11) and an upper box body (12), and the storage sleeve (8) and the lower box body (11) are a one-piece molded part; The side wall of the lower box (11) is provided with a box connection card (111), and the side wall of the upper box (12) is provided with a box connection buckle (121) that matches the box connection card (111); the box connection buckle (121) is buckled at the box connection card (111) and enables the upper box (12) to be fixedly connected to the lower box (11).

9. The side sweeping module assembly of a sweeping machine with telescopic and lifting bristles according to claim 1, characterized in that: The gear box (1) is provided with a rotating sleeve mounting hole (101) for the rotating sleeve (5) to pass through, the lower end of the rotating sleeve (5) passes through the rotating sleeve mounting hole (101) and extends to the bottom of the gear box (1), a rotating sleeve limiting ring (102) is arranged near the rotating sleeve mounting hole (101) inside the gear box (1), the outer wall of the rotating sleeve (5) is provided with a limiting step (53) cooperating with the rotating sleeve limiting ring (102), the limiting step (53) is installed on the rotating sleeve limiting ring (102) in a limited manner, a rotating sleeve limiting sleeve (103) is arranged on the upper wall inside the gear box (1), and the upper end of the rotating sleeve (5) extends into the rotating sleeve limiting sleeve (103).

10. A sweeping machine, characterized in that: The sweeping machine comprises the side sweeping module of the sweeping machine with retractable and lifting bristles as described in any one of claims 1 to 9.

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