High efficiency carpet bristle device
This high-efficiency carpet brushing device, which uses multi-directional combing and adjustable brush tooth density, solves the problems of low brushing efficiency and easy tangling of existing devices, extending service life and improving brushing efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN SHENGRUN CARPET CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-06-16
AI Technical Summary
Existing carpet brushing devices have low brushing efficiency in a single direction, and the uniform spacing of the brush teeth can easily lead to tangling, increasing resistance and shortening service life.
Design an efficient carpet brushing device that uses multi-directional combing and adjustable brush tooth density, with multiple sets of brush teeth staggered and the spacing between the brush teeth flexibly adjusted, to achieve multi-directional rotation to comb out knots and improve brushing efficiency.
It extends the lifespan of the device, improves brushing efficiency, reduces brush tooth resistance, and enhances the abrasion resistance and lifespan of the carpet.
Smart Images
Figure CN224363056U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of carpet processing technology, and in particular to a high-efficiency carpet brushing device. Background Technology
[0002] In the production and processing of carpets, in order to ensure that the carpet fibers are more fluffy and improve the softness and comfort of the carpet, it is often necessary to use a brush device to comb and sort the fibers on the surface of the carpet. Through combing, the carpet fibers will be arranged more tightly, which can increase the wear resistance and service life of the carpet.
[0003] Most current carpet brushing devices have relatively simple structures, often brushing the carpet in only one direction, resulting in low brushing efficiency. Furthermore, the spacing between the brush teeth is often the same, making it easy for the hairs to get tangled, which increases the resistance of the brush teeth and affects the lifespan of the brush.
[0004] Therefore, to address the issue that existing carpet brushing devices are easily obstructed when encountering knots, leading to brush tooth damage, a high-efficiency carpet brushing device can be designed. Through multi-directional combing, using a method of first sparse and then dense, the density of the brush teeth can be flexibly adjusted, and the multi-directional rotation can comb out knots, reducing the possibility of the brush teeth brushing the knots, improving brushing efficiency, and thus effectively extending the service life of the device. Utility Model Content
[0005] To overcome the problems of most carpet brushing devices, which often only brush the carpet in one direction, resulting in low brushing efficiency and uniform tooth spacing, making it easy for the hair to get tangled and increasing brushing resistance, this utility model is proposed.
[0006] The technical solution of this utility model is as follows: a high-efficiency carpet brushing device, comprising a processing table, a lifting plate, a control panel, a lifting assembly, a lead screw, a movable plate, a moving assembly, a disc brush, a rotating assembly, first brush teeth, a second electric telescopic rod, second brush teeth, and an adjustment assembly. A lifting plate is disposed above the processing table, a control panel is disposed on one side of the lifting plate, a lifting assembly is disposed on one side of the lifting plate, a lead screw is disposed on the inner side of the lifting plate, a movable plate is disposed on the outer side of the lead screw, a moving assembly is disposed on the inner side of the lifting plate, a disc brush is disposed on the bottom surface of the movable plate, a rotating assembly is disposed on one side of the disc brush, first brush teeth are disposed on both sides of the bottom surface of the movable plate, a second electric telescopic rod is disposed on the inner side of the movable plate, an adjustment assembly is disposed at one end of the second electric telescopic rod, and second brush teeth are disposed on one side of the adjustment assembly.
[0007] Preferably, the carpet to be combed is placed on a processing table, and the carpet is stably fixed to the surface of the processing table using an external fixing mechanism. The lifting component is controlled by the control panel, and the height of the lifting plate is adjusted using the lifting component to ensure that the disc brush and the first brush teeth contact the carpet according to the actual thickness of the carpet. The control panel controls the rotation of the screw, which drives the movable plate to move back and forth. The moving component ensures the stable displacement of the movable plate. At the same time, since the spacing of the first brush teeth is relatively large, the first brush teeth are used to pre-comb the carpet. Then, the control panel controls the rotation component to drive the disc brush to rotate, which further detangles and combs the carpet, reducing knots. The control panel controls the extension and retraction of the second electric telescopic rod, which drives the adjustment component to adjust the placement position of the second brush teeth. Depending on the direction of the movable plate's movement, the second brush teeth are flexibly inserted between the first brush teeth, reducing the spacing between the first brush teeth. By combing the carpet simultaneously with the first and second brush teeth, the density of the brush teeth can be flexibly adjusted, and the multi-directional rotation can comb out knots, improving brushing efficiency and extending the service life of the device.
[0008] Preferably, the movable plate is set on the bottom surface of the lifting plate, and multiple sets of disc brushes are set. The disc brushes and the movable plate are rotatably connected to each other. Multiple sets of first brush teeth are set. The spacing between the first brush teeth is relatively large. The bottom end of the first brush teeth is at the same height as the bottom end of the disc brush. Two sets of second electric telescopic rods are symmetrically set. The second electric telescopic rods are electrically connected to the control panel. Multiple sets of second brush teeth are set. The second brush teeth are staggered with the first brush teeth.
[0009] Preferably, the lifting assembly includes a support rod, a top plate, a first electric telescopic rod, and a first sliding telescopic rod. The upper surface of the processing table is provided with support rods, and multiple sets of support rods are provided. The support rods are located at the four corners of the processing table. The lifting plate is slidably connected to the support rods. One end of the support rod is provided with the top plate, and the lifting plate is located below the top plate. The bottom surface of the top plate is provided with the first electric telescopic rod, which is electrically connected to the control panel. The lifting plate is located at one end of the first electric telescopic rod, and the bottom surface of the top plate is provided with the first sliding telescopic rod. Two sets of the first sliding telescopic rods are symmetrically arranged on both sides of the first electric telescopic rod, and the lifting plate is located at one end of the first sliding telescopic rod.
[0010] Preferably, the moving component includes a first motor and a first connecting block. The first motor is provided on one side of the lifting plate, the output end of the first motor is connected to the lead screw, the first motor is electrically connected to the control panel, the first connecting block is provided on the outside of the lead screw, and the upper surface of the moving plate is fixedly connected to the bottom surface of the first connecting block.
[0011] Preferably, the moving component also includes a guide rod and a second connecting block. The guide rod is provided on the inner side of the lifting plate, and two sets of guide rods are symmetrically arranged on both sides of the lead screw. The second connecting block is provided on the outer side of the guide rod. The second connecting block and the guide rod are slidably connected to each other. The upper surface of the moving plate is fixedly connected to the bottom surface of the second connecting block.
[0012] Preferably, the rotating assembly includes a worm, a second motor, and a turbine. A worm is located on the inner side of the movable plate, with two sets of worms symmetrically arranged. The worms are rotatably connected to the movable plate. A second motor is located on the outer side of the movable plate, with its output end connected to the worm and electrically connected to the control panel. A turbine is located on the inner side of the movable plate, with two sets of turbines symmetrically arranged on both sides of the worm. The turbines mesh and rotatably connect with the worm. The drive shaft of the turbine passes through the movable plate and is fixedly connected to the disc brush.
[0013] Preferably, the adjustment assembly includes a second sliding telescopic rod and a connecting plate. The second sliding telescopic rod is provided on the inner side of the movable plate. Two sets of the second sliding telescopic rods are symmetrically arranged on both sides of the second electric telescopic rod. A connecting plate is provided at one end of the second electric telescopic rod. The upper surface of the connecting plate is fixedly connected to one end of the second sliding telescopic rod. The second brush tooth is provided on the bottom surface of the connecting plate. The connecting plate and the first brush tooth are slidably connected to each other.
[0014] The beneficial effects of this utility model are:
[0015] When combing a carpet, the carpet to be combed is placed on a processing table and stably fixed to the surface of the table using an external fixing mechanism. The height of the lifting plate is adjusted via the control panel to ensure that the disc brush and the first brush teeth contact the carpet according to its actual thickness. The control panel controls the rotation of the screw, which moves the movable plate back and forth. Based on the direction of the movable plate's movement, the first brush teeth pre-comb the carpet. Then, the control panel controls the rotation of the disc brush to further detangle and comb the carpet, reducing knots. The control panel controls the extension and retraction of the second electric telescopic rod, which adjusts the position of the second brush teeth, allowing them to intersect between the first brush teeth. The second brush teeth reduce the spacing between the first brush teeth, and the first and second brush teeth simultaneously comb the carpet again. This addresses the problem that most carpet brushing devices only perform reciprocating brushing in one direction, resulting in low brushing efficiency and often having uniform brush tooth spacing, which easily leads to knots and increased brush tooth resistance. This method extends the lifespan of the device. Attached Figure Description
[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of a high-efficiency carpet brushing device according to this utility model.
[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of the lifting plate of a high-efficiency carpet brushing device according to this utility model.
[0018] Figure 3 The diagram shown is a three-dimensional structural schematic of the moving component of a high-efficiency carpet brushing device according to this utility model.
[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the rotating component of a high-efficiency carpet brushing device according to this utility model.
[0020] Figure 5 The diagram shown is a three-dimensional structural schematic of the second brush tooth of a high-efficiency carpet brushing device according to this utility model.
[0021] Explanation of reference numerals in the attached drawings: 1. Processing table; 2. Lifting plate; 201. Support rod; 202. Top plate; 203. First electric telescopic rod; 204. First sliding telescopic rod; 3. Control panel; 4. Lead screw; 401. First motor; 402. First connecting block; 403. Guide rod; 404. Second connecting block; 5. Movable plate; 6. Disc brush; 601. Worm gear; 602. Second motor; 603. Turbine; 7. First brush tooth; 8. Second electric telescopic rod; 9. Second brush tooth; 901. Second sliding telescopic rod; 902. Connecting plate. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0023] Please see Figure 1 and Figure 2This utility model provides an embodiment of a high-efficiency carpet brushing device, comprising a processing table 1, a lifting plate 2, a control panel 3, a lifting assembly, a lead screw 4, a movable plate 5, a moving assembly, a disc brush 6, a rotating assembly, first brush teeth 7, a second electric telescopic rod 8, second brush teeth 9, and an adjustment assembly. The lifting plate 2 is positioned above the processing table 1. The control panel 3 is located on one side of the lifting plate 2. The lifting assembly is located on one side of the lifting plate 2. The lead screw 4 is located inside the lifting plate 2. The movable plate 5 is located outside the lead screw 4 and is situated on the bottom surface of the lifting plate 2. The moving assembly is located inside the lifting plate 2. The disc brush is located on the bottom surface of the movable plate 5. 6. Multiple sets of disc brushes 6 are provided. Disc brushes 6 and movable plate 5 are rotatably connected to each other. A rotating component is provided on one side of disc brushes 6. First brush teeth 7 are provided on both sides of the bottom surface of movable plate 5. Multiple sets of first brush teeth 7 are provided. The spacing between the first brush teeth 7 is relatively large. The bottom end of the first brush teeth 7 is at the same height as the bottom end of disc brushes 6. A second electric telescopic rod 8 is provided on the inner side of movable plate 5. Two sets of second electric telescopic rods 8 are symmetrically arranged. The second electric telescopic rods 8 are electrically connected to control panel 3. An adjustment component is provided at one end of the second electric telescopic rod 8. A second brush tooth 9 is provided on one side of the adjustment component. Multiple sets of second brush teeth 9 are provided. The second brush teeth 9 are staggered with the first brush teeth 7.
[0024] Please see Figure 1 In this embodiment, the lifting assembly includes a support rod 201, a top plate 202, a first electric telescopic rod 203, and a first sliding telescopic rod 204. The upper surface of the processing table 1 is provided with the support rod 201, and multiple sets of support rods 201 are provided. The support rods 201 are located at the four corners of the processing table 1. The lifting plate 2 is slidably connected to the support rod 201. One end of the support rod 201 is provided with the top plate 202, and the lifting plate 2 is located below the top plate 202. The bottom surface of the top plate 202 is provided with the first electric telescopic rod 203, which is electrically connected to the control panel 3. The lifting plate 2 is located on the first electric telescopic rod 203. At one end, the bottom surface of the top plate 202 is provided with a first sliding telescopic rod 204. Two sets of the first sliding telescopic rods 204 are symmetrically arranged on both sides of the first electric telescopic rod 203. The lifting plate 2 is located at one end of the first sliding telescopic rod 204. The top plate 202 is supported and fixed by the support rod 201. The position of the first electric telescopic rod 203 is fixed by the top plate 202. The extension and retraction of the first electric telescopic rod 203 is controlled by the control panel 3. The extension and retraction of the first electric telescopic rod 203 flexibly adjusts the placement height of the lifting plate 2, thereby driving the first sliding telescopic rod 204 to extend and retract synchronously, ensuring the stable lifting and retraction of the lifting plate 2.
[0025] Please see Figure 2 and Figure 3In this embodiment, the moving component includes a first motor 401, a first connecting block 402, a guide rod 403, and a second connecting block 404. The first motor 401 is located on one side of the lifting plate 2, and its output end is connected to the lead screw 4. The first motor 401 is electrically connected to the control panel 3. The first connecting block 402 is located on the outer side of the lead screw 4, and the upper surface of the movable plate 5 is fixedly connected to the bottom surface of the first connecting block 402. Two sets of guide rods 403 are symmetrically arranged on the inner side of the lifting plate 2. On both sides of the lead screw 4, a second connecting block 404 is provided on the outer side of the guide rod 403. The second connecting block 404 and the guide rod 403 are slidably connected to each other. The upper surface of the movable plate 5 is fixedly connected to the bottom surface of the second connecting block 404. The first motor 401 is controlled by the control panel 3 to run. The first motor 401 drives the lead screw 4 to rotate. The rotation of the lead screw 4 drives the first connecting block 402 to move. The movement of the first connecting block 402 drives the movable plate 5 to move back to the original position, so that the second connecting block 404 slides along the guide rod 403, thereby driving the movable plate 5 to move back to the original position to comb the carpet surface.
[0026] Please see Figure 4 In this embodiment, the rotating assembly includes a worm gear 601, a second motor 602, and a turbine 603. The worm gear 601 is arranged on the inner side of the movable plate 5, with two sets of worm gears 601 symmetrically arranged. The worm gear 601 is rotatably connected to the movable plate 5. The second motor 602 is arranged on the outer side of the movable plate 5, and its output end is connected to the worm gear 601. The second motor 602 is electrically connected to the control panel 3. The turbine 603 is arranged on the inner side of the movable plate 5, and the turbine 603 rotates with the movable plate 5. The system is dynamically connected, with two sets of turbines 603 symmetrically arranged on both sides of the worm 601. The turbines 603 and the worm 601 are meshed and rotated together. The drive shaft of the turbine 603 passes through the movable plate 5 and is fixedly connected to the disc brush 6. The second motor 602 is controlled by the control panel 3 to run. The second motor 602 drives the worm 601 to rotate, which in turn drives the turbines 603 to mesh and rotate. The turbines 603 then drive the disc brush 6 to rotate, and the rotating disc brush 6 combs out the knots in the carpet.
[0027] Please see Figure 5In this embodiment, the adjustment component includes a second sliding telescopic rod 901 and a connecting plate 902. The second sliding telescopic rod 901 is provided on the inner side of the movable plate 5. Two sets of the second sliding telescopic rod 901 are symmetrically arranged on both sides of the second electric telescopic rod 8. The connecting plate 902 is provided at one end of the second electric telescopic rod 8. The upper surface of the connecting plate 902 is fixedly connected to one end of the second sliding telescopic rod 901. The second brush tooth 9 is provided on the bottom surface of the connecting plate 902. The connecting plate 902 and the first brush tooth 7 are slidably connected. The extension and retraction of the second electric telescopic rod 8 flexibly adjusts the placement position of the connecting plate 902, driving the second sliding telescopic rod 901 to extend and retract synchronously, thereby adjusting the placement height of the second brush tooth 9 and flexibly adjusting the density of the brush teeth.
[0028] Before brushing, the carpet is laid flat on the processing table 1. The four corners of the carpet are fixed by the external fixing mechanism. The control panel 3 sends an extension command to the first electric telescopic rod 203 on the top plate 202. The extension of the first electric telescopic rod 203 causes the lifting plate 2 to move down, which in turn causes the first sliding telescopic rod 204 to extend synchronously, so that the lifting plate 2 slides down along the support rod 201 synchronously, and the first brush teeth 7 and the disc brush 6 come into contact with the carpet surface.
[0029] When brushing bristles, the control panel 3 sends a running command to the first motor 401, which drives the lead screw 4 to rotate. Rotating the lead screw 4 moves the first connecting block 402 to a different position. At the same time, the second connecting block 404 slides along the guide rod 403, thereby driving the movable plate 5 to move back and forth on the processing table 1.
[0030] When the movable plate 5 moves, the first brush tooth 7 is used to comb the carpet. At the same time, the control panel 3 sends a running command to the second motor 602. The second motor 602 drives the worm 601 to rotate. The worm 601 rotates the turbine 603, and the turbine 603 rotates the disc brush 6 to rotate synchronously. The disc brush 6 performs multi-directional combing on the carpet.
[0031] Subsequently, the control panel 3 sends an extension command to another set of second electric telescopic rods 8. The extension of the second electric telescopic rods 8 causes the connecting plate 902 to move down along the first brush tooth 7, which in turn causes the second sliding telescopic rod 901 to extend synchronously, so that the first brush tooth 7 and the second brush tooth 9 can brush the carpet at the same time.
[0032] When the movable plate 5 returns, the control panel 3 sends a retraction command to the extended second electric telescopic rod 8, and then sends an extension command to another set of second electric telescopic rods 8. Thus, the first brush tooth 7 is used to pre-brush the carpet, the disc brush 6 combs the carpet knots in multiple directions, and finally, the first brush tooth 7 and the second brush tooth 9 are used to perform the final brushing treatment on the carpet to complete the brushing operation.
[0033] Through the above steps, the carpet to be combed is placed on the processing table 1, and the carpet is stably fixed to the upper surface of the processing table 1 using an external fixing mechanism. The lifting component is controlled by the control panel 3, and the height of the lifting plate 2 is adjusted using the lifting component to ensure that the disc brush 6 and the first brush teeth 7 contact the carpet according to the actual thickness of the carpet. The screw 4 is controlled to rotate using the control panel 3, and rotating the screw 4 drives the movable plate 5 to move back to its original position. The movable component ensures the stable displacement of the movable plate 5. At the same time, because the spacing of the first brush teeth 7 is relatively large, the first brush teeth 7 are used to pre-comb the carpet, and then controlled by the control... Panel 3 controls the rotating component to drive the disc brush 6 to rotate. The rotating disc brush 6 ruminates and combs the carpet, reducing tangles. The control panel 3 controls the extension and retraction of the second electric telescopic rod 8. The extension and retraction of the second electric telescopic rod 8 drives the adjustment component to adjust the placement of the second brush teeth 9. Depending on the forward direction of the movable plate 5, the second brush teeth 9 can be flexibly inserted between the first brush teeth 7. The second brush teeth 9 reduce the tooth spacing between the first brush teeth 7. The first brush teeth 7 and the second brush teeth 9 comb the carpet simultaneously, thereby flexibly adjusting the density of the brush teeth, and combing out tangles in multiple directions, improving brushing efficiency.
[0034] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A high-efficiency carpet brushing device, comprising a processing table (1), a lifting plate (2), a control panel (3), a lifting assembly, and a lead screw (4), characterized in that: It also includes a movable plate (5), a moving component, a disc brush (6), a rotating component, a first brush tooth (7), a second electric telescopic rod (8), a second brush tooth (9), and an adjustment component. A lifting plate (2) is provided above the processing table (1). A control panel (3) is provided on one side of the lifting plate (2). A lifting component is provided on one side of the lifting plate (2). A lead screw (4) is provided on the inner side of the lifting plate (2). A movable plate (5) is provided on the outer side of the lead screw (4). A moving component is provided on the inner side of the lifting plate (2). A disc brush (6) is provided on the bottom surface of the movable plate (5). A rotating component is provided on one side of the disc brush (6). First brush teeth (7) are provided on both sides of the bottom surface of the movable plate (5). A second electric telescopic rod (8) is provided on the inner side of the movable plate (5). An adjustment component is provided at one end of the second electric telescopic rod (8). A second brush tooth (9) is provided on one side of the adjustment component.
2. The high-efficiency carpet brushing device according to claim 1, characterized in that: The movable plate (5) is set on the bottom surface of the lifting plate (2). Multiple sets of disc brushes (6) are provided. The disc brushes (6) and the movable plate (5) are rotatably connected to each other. Multiple sets of first brush teeth (7) are provided. The spacing between the first brush teeth (7) is relatively large. The bottom end of the first brush teeth (7) is at the same height as the bottom end of the disc brush (6). Two sets of second electric telescopic rods (8) are symmetrically provided. The second electric telescopic rods (8) are electrically connected to the control panel (3). Multiple sets of second brush teeth (9) are provided. The second brush teeth (9) and the first brush teeth (7) are staggered.
3. The high-efficiency carpet brushing device according to claim 1, characterized in that: The lifting assembly includes a support rod (201), a top plate (202), a first electric telescopic rod (203), and a first sliding telescopic rod (204). The upper surface of the processing table (1) is provided with the support rod (201), and multiple sets of the support rod (201) are provided. The support rods (201) are located at the four corners of the processing table (1). The lifting plate (2) is slidably connected to the support rod (201). One end of the support rod (201) is provided with the top plate (202), and the lifting plate (203) is located below the top plate (204). 2) The bottom surface is provided with a first electric telescopic rod (203), the first electric telescopic rod (203) is electrically connected to the control panel (3), the lifting plate (2) is provided at one end of the first electric telescopic rod (203), the bottom surface of the top plate (202) is provided with a first sliding telescopic rod (204), two sets of the first sliding telescopic rod (204) are symmetrically arranged, the first sliding telescopic rod (204) is symmetrically arranged on both sides of the first electric telescopic rod (203), and the lifting plate (2) is provided at one end of the first sliding telescopic rod (204).
4. The high-efficiency carpet brushing device according to claim 1, characterized in that: The moving component includes a first motor (401) and a first connecting block (402). The first motor (401) is provided on one side of the lifting plate (2). The output end of the first motor (401) is connected to the lead screw (4). The first motor (401) is electrically connected to the control panel (3). The first connecting block (402) is provided on the outside of the lead screw (4). The upper surface of the movable plate (5) is fixedly connected to the bottom surface of the first connecting block (402).
5. The high-efficiency carpet brushing device according to claim 4, characterized in that: The moving component also includes a guide rod (403) and a second connecting block (404). The guide rod (403) is provided on the inner side of the lifting plate (2). Two sets of guide rods (403) are symmetrically arranged on both sides of the lead screw (4). The second connecting block (404) is provided on the outer side of the guide rod (403). The second connecting block (404) and the guide rod (403) are slidably connected to each other. The upper surface of the movable plate (5) is fixedly connected to the bottom surface of the second connecting block (404).
6. The high-efficiency carpet brushing device according to claim 1, characterized in that: The rotating assembly includes a worm (601), a second motor (602), and a turbine (603). The worm (601) is provided on the inner side of the movable plate (5). Two sets of worms (601) are symmetrically arranged. The worms (601) are rotatably connected to the movable plate (5). The second motor (602) is provided on the outer side of the movable plate (5). The output end of the second motor (602) is connected to the worm (601). The second motor (602) is electrically connected to the control panel (3). The turbine (603) is provided on the inner side of the movable plate (5). The turbine (603) is rotatably connected to the movable plate (5). Two sets of turbines (603) are symmetrically arranged on both sides of the worm (601). The turbine (603) meshes with the worm (601) and is rotatably connected. The drive shaft of the turbine (603) passes through the movable plate (5) and is fixedly connected to the disc brush (6).
7. The high-efficiency carpet brushing device according to claim 1, characterized in that: The adjustment assembly includes a second sliding telescopic rod (901) and a connecting plate (902). The second sliding telescopic rod (901) is provided on the inner side of the movable plate (5). Two sets of the second sliding telescopic rod (901) are symmetrically arranged on both sides of the second electric telescopic rod (8). A connecting plate (902) is provided at one end of the second electric telescopic rod (8). The upper surface of the connecting plate (902) is fixedly connected to one end of the second sliding telescopic rod (901). The second brush tooth (9) is provided on the bottom surface of the connecting plate (902). The connecting plate (902) and the first brush tooth (7) are slidably connected to each other.