A vacuum cleaner floor brush

Abstract

The invention discloses a floor brush for a vacuum cleaner. It comprises a bottom cover, an upper cover and a floor brush hanging head, the bottom cover is mounted on the upper cover, an air inlet slot is provided on the bottom cover, an air inlet is provided in the middle of the bottom of the air inlet slot, a brush holder and a lifting switch are provided inside the upper cover, an air inlet duct matching the air inlet is provided on the upper cover, the brush holder is mounted inside the upper cover and is placed between the bottom cover and the upper cover, a lifting spring is provided between the brush holder and the upper cover, the lifting switch is placed outside the upper cover and connected to the brush holder, the air inlet duct is placed in the middle of the brush holder, a hair strip cavity is provided between the bottom cover and the upper cover, a floor brush hair strip is provided on the brush holder, the floor brush hair strip is placed in the hair strip cavity, a rear wheel assembly is provided on the upper cover, the floor brush hanging head is mounted on the upper cover and is connected to the air inlet duct, and the upper cover, the bottom cover and the floor brush hanging head are all connected to the rear wheel assembly. The beneficial effects of the invention are: wide application range, improved dust collection effect, increased strength, good positioning effect, good sealing effect, and convenient installation and disassembly.

Description

Technical Field

[0001] The present invention relates to the technical field related to vacuum cleaners, and in particular to a floor brush for vacuum cleaners. Background Art

[0002] The vacuum cleaner is mainly composed of three parts: dust collection, dust collection, and dust filtration. It generally includes a series commutator motor, a centrifugal fan, a dust filter (bag), and dust collection accessories. The power of a general vacuum cleaner is 400-1000W or higher, and the power of a portable vacuum cleaner is generally 250W or less. The vacuum cleaner can remove dust mainly because its "head" is equipped with an electric exhaust fan. There is a wind impeller on the rotating shaft of the exhaust fan. After power is turned on, the exhaust fan will generate a high suction and pressure at a speed of 500 revolutions per second. Under the action of suction and pressure, the air is discharged at a high speed, and the air in the dust collection part at the front end of the fan continuously replenishes the air in the fan, causing an instantaneous vacuum inside the vacuum cleaner, forming a negative pressure difference with the external atmospheric pressure. Under the action of this pressure difference, dust-containing air is inhaled. Dust and other debris enter the dust filter bag through the carpet or floor brush, long pipe, elbow, hose, and hose connector in turn. Dust and other debris are retained in the dust filter bag. After the air is purified by the filter, it is discharged from the tail of the machine body.

[0003] The existing vacuum cleaner floor brush is often just a single floor brush, which only vacuums the floor through the air inlet and is generally not provided with a bristle strip. Even if a bristle strip is designed, it is a fixed design and cannot be dynamically adjusted according to actual conditions, which affects the application range of the entire floor brush. Summary of the invention

[0004] The present invention aims to overcome the above-mentioned deficiencies in the prior art and provides a vacuum cleaner floor brush with a wide range of applications.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A vacuum cleaner floor brush comprises a bottom cover, an upper cover and a floor brush hanging head, the bottom cover is mounted on the upper cover, the bottom cover is provided with an air inlet slot, the middle of the bottom of the air inlet slot is provided with an air inlet, the upper cover is provided with a brush holder and a lifting switch, the upper cover is provided with an air inlet duct matching the air inlet, the brush holder is mounted on the inside of the upper cover and placed between the bottom cover and the upper cover, a lifting spring is provided between the brush holder and the upper cover, the lifting switch is placed on the outside of the upper cover and connected with the brush holder, the air inlet duct is placed in the middle position of the brush holder, a hair strip cavity is provided between the bottom cover and the upper cover, a floor brush hair strip is provided on the brush holder, the floor brush hair strip is placed in the hair strip cavity, the upper cover is provided with a rear wheel assembly, the floor brush hanging head is mounted on the upper cover and communicated with the air inlet duct, and the upper cover, the bottom cover and the floor brush hanging head are all connected with the rear wheel assembly.

[0007] When in use, vacuuming is performed through the air inlet slot on the bottom cover, and a bristle brush and a lifting switch are designed inside the upper cover. The lifting switch is operated on the bristle brush to make the bristles of the floor brush extend or retract into the bristle cavity between the upper cover and the bottom cover. The extension and retraction of the bristles of the floor brush are selected according to the actual vacuuming environment. This design achieves the purpose of a wide range of applications.

[0008] Preferably, the air inlet slot is placed on the front of the bottom cover, and air inlet bumps are provided on the left and right ends of the air inlet slot, and an air inlet notch is provided on the air inlet bump, and the air inlet notch is connected to the air inlet slot. The design of the air inlet notch can ensure smooth air flow into the air inlet slot, and at the same time, dust on both sides of the air inlet slot can be smoothly inhaled.

[0009] Preferably, an electrostatic slot is provided on the front side of the bottom cover and outside the air inlet slot, and an electrostatic strip is installed in the electrostatic slot, and the electrostatic strip is located above the air inlet. The design of the electrostatic slot can effectively prevent static electricity.

[0010] Preferably, a belt groove is provided on the front side of the bottom cover and is placed on the outside of the air inlet groove, a floor brush belt is provided in the belt groove, a plurality of evenly distributed limit buckles are provided in the belt groove, a rotating shaft is provided on one side of the floor brush belt, the rotating shaft is placed in the belt groove and is limited in the belt groove by the limit buckle, the belt groove is located below the air inlet and corresponds to the position of the electrostatic slot up and down. Among them: the floor brush belt is made of PVC soft material, which can be elastically compressed. The floor brush belt is placed in the belt groove and is limited by the limit buckle, and the floor brush belt is designed with a rotating shaft so that it can swing back and forth in the belt groove, so that the height of the floor brush belt is flush with the bottom surface of the dust suction.

[0011] Preferably, the air inlet groove is in a trapezoidal shape, the upper bottom edge of the air inlet groove is close to the leather groove, the lower bottom edge of the air inlet groove is close to the electrostatic groove, the upper bottom edge length of the air inlet groove is less than the lower bottom edge length of the air inlet groove, and the depth of the air inlet groove gradually increases from the end close to the air inlet protrusion to the end close to the air inlet. This design makes the air inlet groove conical in the horizontal direction and trapezoidal in the vertical direction, the purpose of which is to better improve the dust collection effect.

[0012] Preferably, a plurality of evenly distributed connecting ribs are provided on the back of the bottom cover and between the air inlet and the leather groove, and the connecting ribs are provided with arc-shaped grooves, and the lifting switch is placed in the arc-shaped grooves. The design of the connecting ribs can increase the strength of the bottom cover on the one hand, and can also be used to position the lifting switch on the other hand.

[0013] Preferably, the left and right sides of the upper cover are provided with notches matching the air inlet protrusions, the air inlet is provided with an annular groove, and a sealing flange matching the annular groove is provided on a port of the air inlet duct connected to the air inlet. Through the design of the annular groove and the sealing flange, when the bottom cover and the upper cover are matched, the air inlet groove and the air inlet duct are sealed when connected, so that dust will not enter between the upper cover and the bottom cover; and the design of the notch and the air inlet protrusion forms a trapezoidal air duct between the upper cover and the bottom cover, ensuring that dust can reach the air inlet smoothly.

[0014] Preferably, a bristle strip groove is provided at the front end of the brush holder, the bristle strip of the floor brush is placed in the bristle strip groove, a plurality of evenly distributed limiting buckles are provided in the bristle strip groove, a limiting edge is provided on one side of the bristle strip of the floor brush, the limiting edge is placed in the bristle strip groove and is limited in the bristle strip groove by the limiting buckles, a positioning fulcrum is provided at the rear end of the brush holder, a positioning fulcrum is provided with a positioning hole, a positioning column matching the positioning hole is provided inside the upper cover, the lifting spring is installed on the positioning column, one end of the lifting spring is placed in the upper cover, and the other end of the lifting spring contacts with the positioning fulcrum, a limiting hole is provided in the middle of the brush holder, a limiting frame corresponding to the limiting hole is provided inside the upper cover, a limiting rotating shaft is provided in the limiting hole, and a limiting groove corresponding to the limiting rotating shaft is provided on the limiting frame. The design of the bristle strip groove and the limiting buckle facilitates the installation and removal of the brush strip; the design of the positioning fulcrum, the positioning column and the lifting spring facilitates the resetting of the brush holder and limits the stroke of the brush holder; the structural design of the limiting hole and the limiting frame further limits the stroke of the brush holder; the design of the entire brush holder enables the floor brush strips thereon to be lifted up and down and used for different dust contact surfaces.

[0015] Preferably, the lifting switch comprises a lifting pedal and a lifting shaft, the lifting switch is integrally formed, one end of the lifting shaft is mounted on one side of the lifting pedal, the upper cover is provided with a lifting hole matching the lifting pedal, the other end of the lifting shaft and the other side of the lifting pedal are provided with shaft heads, the interior of the upper cover is provided with a shaft seat matching the shaft head, the interior of the upper cover is provided with a plurality of support frames, one end of the support frame is mounted on the interior of the upper cover, the other end of the support frame is provided with a shaft groove matching the lifting shaft, the lifting shaft is provided with a baffle, the baffle is provided with a plurality of evenly distributed reinforcing ribs, the brush holder is provided with a retaining groove matching the baffle at a position between the limiting hole and the positioning fulcrum, and a retaining strip is provided on the side of the retaining groove close to the limiting hole. The structural design of the lifting switch facilitates the disassembly and installation of the lifting switch; and the design of the baffle, retaining groove and retaining strip can limit the displacement stroke of the baffle to control the extension and retraction of the brush strip.

[0016] Preferably, the cross-section of the air inlet is L-shaped, and the air inlet includes a first air duct and a second air duct, the first air duct and the second air duct are perpendicular to each other, one end of the first air duct is connected to the air inlet, the other end of the first air duct is connected to one end of the second air duct by an arc transition, and the other end of the second air duct is connected to the floor brush hanging head. The arc transition design of the air inlet ensures a smooth transition of the air duct.

[0017] Preferably, an air duct sealing ring is provided between the second air duct and the floor brush hanging head, the air duct sealing ring is made of heat shrinkable elastomer material, and evenly distributed horizontal grilles are provided on the outer surface of the air duct sealing ring. The air duct sealing ring is made of heat shrinkable elastomer PTV material, and the surface is designed as a horizontal grille to ensure that it has sufficient elasticity.

[0018] Preferably, the floor brush hanging head comprises a hanging head body and a hanging head air inlet pipe, the hanging head body is installed between the upper cover and the bottom cover, the hanging head body is provided with an air inlet hole, the air duct sealing ring is installed between the second air duct and the air inlet hole, the hanging head air inlet pipe is installed on the hanging head body and is rotatably connected with the hanging head body, the hanging head air inlet pipe is L-shaped, the angle of the hanging head air inlet pipe is 45°, and the angle between the hanging head air inlet pipe on the floor brush hanging head and the plane where the bottom cover is located ranges from 25° to 65°. Since the floor brush hanging head is connected to the air inlet pipe through the air duct sealing ring, and the elastic body design of the air duct sealing ring enables the floor brush hanging head to be elastically adjusted in angle with the bottom cover.

[0019] Preferably, a sealing sleeve is provided on the hanging head main body and placed at the position where the air inlet is located, the cross-sectional shape of the sealing sleeve is a waist-shaped hole, the maximum distance of the sealing sleeve is consistent with the diameter of the air inlet, the air duct sealing ring is installed between the second air duct and the sealing sleeve, a positioning ring groove 1 and a guide groove are provided on the inner wall of the air inlet, the guide groove is placed on one end of the air inlet and is connected with the positioning ring groove 1, a positioning ring groove 2 is provided on the outer side surface of one end of the hanging head air inlet pipe, a ring-shaped clamping ring is provided in the positioning ring groove 2, the ring-shaped clamping ring in the positioning ring groove 2 matches the positioning ring groove 1 in the air inlet, an opening is provided on the ring-shaped clamping ring, and a positioning baffle is provided on the end of the hanging head air inlet pipe provided with the positioning ring groove 2. Through the design of the sealing sleeve, the air duct sealing ring can be sealed and connected; the design of the guide groove facilitates the installation of the hanging head air inlet duct; the design of the positioning ring groove one, the positioning ring groove two and the annular clamping ring can facilitate the sealing and rotational connection between the hanging head air inlet duct and the hanging head body; the design of the positioning baffle is to limit the position of the hanging head air inlet duct.

[0020] Preferably, wheel grooves are provided on the front of the bottom cover and on the left and right sides of the electrostatic tank, mounting grooves are provided on the left and right sides of the wheel grooves, front wheels are provided in the wheel grooves, and mounting columns matching the mounting grooves are provided on the left and right sides of the front wheels. The front wheel and rear wheel assembly are designed to ensure that the bottom surface of the floor brush is in contact with the dusty floor with wheels, ensuring that the floor brush can be dragged flexibly on the floor.

[0021] Preferably, the distance between the plane where the bottom cover is located and the plane formed by the front wheel and rear wheel assembly is 0.6mm-1.5mm. Through the above structural design, the floor brush is ensured to be flexibly dragged on the ground while ensuring the dust collection effect.

[0022] Preferably, the rear wheel assembly includes a rear roller and a metal shaft, the upper cover, the bottom cover and the floor brush hanging head are all provided with metal shaft seats, the upper cover is provided with a wheel groove matching the rear roller, the rear roller is mounted on both ends of the metal shaft and placed in the wheel groove, and the metal shaft is mounted on the metal shaft seat of the upper cover, the metal shaft seat of the bottom cover and the metal shaft seat of the floor brush hanging head. The strength of the rear wheel assembly is ensured by the design of the metal shaft.

[0023] Preferably, the rear roller is provided with a rear wheel cover, both ends of the metal shaft are provided with annular grooves, the middle of the rear roller is provided with an axle holder, the axle holder is composed of a plurality of buckles, the metal shaft is installed in the axle holder, the buckle is placed in the annular groove, the rear wheel cover is installed on the rear roller, the rear wheel cover is provided with a cover hole, and the cover hole of the rear wheel cover is installed on the axle holder of the rear roller. The design of the buckle and the rear wheel cover ensures that the rear roller does not fall off on the one hand, and prevents dust from entering the rear roller on the other hand.

[0024] The beneficial effects of the present invention are: it can be selected according to the actual dust collection environment, has a wide range of applications, smooth air intake, can effectively prevent static electricity, better improve the dust collection effect, increase strength, have a good positioning effect, have a good sealing effect, and can be easily installed and disassembled. The floor brush bristles can be raised and lowered for different dust contact surfaces, and the arc transition design of the air inlet duct ensures a smooth transition of the air duct. The floor brush hanging head can be flexibly adjusted to the angle with the bottom cover, ensuring that the floor brush can be flexibly dragged on the ground while ensuring the dust collection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 and Fig.10 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0027] Figure 3 and Figure 4It is a schematic diagram of the structure of the bottom cover;

[0028] Figure 5 It is a schematic diagram of the structure of the upper cover;

[0029] Figure 6 It is a structural diagram of the brush holder;

[0030] Figure 7 It is a structural diagram of the lifting switch;

[0031] Figure 8 This is a structural diagram of a floor brush hanging head;

[0032] Fig. 9 It is a structural schematic diagram of the rear wheel assembly.

[0033] In the figure: 1. bottom cover, 2. upper cover, 3. floor brush head, 4. lifting switch, 5. head air inlet pipe, 6. head body, 7. sealing sleeve, 8. air duct sealing ring, 9. horizontal grille, 10. rear wheel assembly, 11. brush holder, 12. limiting edge, 13. floor brush strip, 14. rotating shaft, 15. floor brush strip, 16. front wheel, 17. connecting rib, 18. air inlet, 19. wheel groove, 20. installation groove, 21. air inlet groove, 22. electrostatic groove, 23. arc groove, 24. strip groove, 25. limit buckle, 26. air inlet convex block, 27. air inlet notch, 28. notch, 29. shaft seat, 30. lifting hole, 31. support frame, 32. shaft groove, 33. Air inlet, 34. Limiting frame, 35. Positioning column, 36. Metal shaft seat, 37. First air duct, 38. Second air duct, 39. Wheel groove, 40. Limiting buckle, 41. Wool strip groove, 42. Limiting shaft, 43. Limiting hole, 44. Positioning hole, 45. Positioning fulcrum, 46. Stop groove, 47. Limiting strip, 48. Lifting pedal, 49. Baffle, 50. Lifting shaft, 51. Reinforcement rib, 52. Shaft head, 53. Positioning ring groove 2, 54. Air inlet, 55. Guide groove, 56. Positioning baffle, 57. Positioning ring groove 1, 58. Rear roller, 59. Shaft seat, 60. Buckle, 61. Rear wheel cover, 62. Cover hole, 63. Ring groove, 64. Metal shaft, 65. Limiting groove, 66. Wool strip cavity, 67. Annular groove, 68. Sealing flange. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] like Figure 1 , Figure 2 and Fig.10In the embodiment described, a vacuum cleaner floor brush comprises a bottom cover 1, an upper cover 2 and a floor brush hanging head 3, the bottom cover 1 is mounted on the upper cover 2, an air inlet slot 21 is provided on the bottom cover 1, an air inlet port 18 is provided in the middle of the bottom of the air inlet slot 21, a brush holder 11 and a lifting switch 4 are provided inside the upper cover 2, an air inlet duct 33 matching the air inlet port 18 is provided on the upper cover 2, the brush holder 11 is mounted inside the upper cover 2 and is placed between the bottom cover 1 and the upper cover 2, and a brush holder 11 and the upper cover 2 are provided between the brush holder 11 and the upper cover 2. There is a lifting spring, the lifting switch 4 is placed on the outside of the upper cover 2 and connected to the brush rack 11, the air inlet duct 33 is placed in the middle position of the brush rack 11, a hair strip cavity 66 is provided between the bottom cover 1 and the upper cover 2, a floor brush hair strip 13 is provided on the brush rack 11, the floor brush hair strip 13 is placed in the hair strip cavity 66, a rear wheel assembly 10 is provided on the upper cover 2, the floor brush hanging head 3 is installed on the upper cover 2 and is connected to the air inlet duct 33, and the upper cover 2, the bottom cover 1 and the floor brush hanging head 3 are all connected to the rear wheel assembly 10.

[0036] like Figure 2 , Figure 3 , Figure 4 As shown, the air inlet slot 21 is placed on the front of the bottom cover 1, and air inlet protrusions 26 are provided on the left and right ends of the air inlet slot 21, and an air inlet notch 27 is provided on the air inlet protrusion 26, and the air inlet notch 27 is connected to the air inlet slot 21. An electrostatic slot 22 is provided on the front of the bottom cover 1 and is placed outside the air inlet slot 21. An electrostatic strip is installed in the electrostatic slot 22, and the position of the electrostatic strip is placed above the air inlet 18. A leather strip slot 24 is provided on the front of the bottom cover 1 and is placed outside the air inlet slot 21. A floor brush leather strip 15 is provided in the leather strip slot 24, and a plurality of evenly distributed limit buckles 25 are provided in the leather strip slot 24. A rotating shaft 14 is provided on one side of the floor brush leather strip 15, and the rotating shaft 14 is placed in the leather strip slot 24 and is limited in the leather strip slot 24 by the limit buckle 25. The position of the leather strip slot 24 is placed below the air inlet 18 and corresponds to the position of the electrostatic slot 22. The air inlet slot 21 is in a trapezoidal shape, the upper bottom edge of the air inlet slot 21 is close to the strap slot 24, the lower bottom edge of the air inlet slot 21 is close to the electrostatic slot 22, the upper bottom edge length of the air inlet slot 21 is less than the lower bottom edge length of the air inlet slot 21, and the depth of the air inlet slot 21 gradually increases from the end close to the air inlet protrusion 26 to the end close to the air inlet 18. A plurality of evenly distributed connecting ribs 17 are provided on the back of the bottom cover 1 and located between the air inlet 18 and the strap slot 24. A circular arc groove 23 is provided on the connecting rib 17, and the lifting switch 4 is placed in the circular arc groove 23. Figure 5As shown, the left and right sides of the upper cover 2 are provided with notches 28 matching the air inlet convex block 26, the air inlet 18 is provided with an annular groove 67, and a sealing flange 68 matching the annular groove 67 is provided on a port of the air inlet 33 communicating with the air inlet 18. Wheel grooves 19 are provided on the front of the bottom cover 1 and are placed on the left and right sides of the electrostatic slot 22. Mounting grooves 20 are provided on the left and right sides of the wheel groove 19. The front wheel 16 is provided in the wheel groove 19. Mounting columns matching the mounting grooves 20 are provided on the left and right sides of the front wheel 16. The distance between the plane where the bottom cover 1 is located and the plane formed by the front wheel 16 and the rear wheel assembly 10 is 0.6mm-1.5mm.

[0037] like Figure 5 , Figure 6 As shown, a strip groove 41 is provided at the front end of the brush holder 11, and a floor brush strip 13 is placed in the strip groove 41. A plurality of evenly distributed limiting buckles 40 are provided in the strip groove 41. A limiting edge 12 is provided on one side of the floor brush strip 13. The limiting edge 12 is placed in the strip groove 41 and is limited in the strip groove 41 by the limiting buckle 40. A positioning fulcrum 45 is provided at the rear end of the brush holder 11. A positioning hole 44 is provided on the positioning fulcrum 45. A positioning column 35 matching the positioning hole 44 is provided inside the upper cover 2. A lifting spring is installed on the positioning column 35. One end of the lifting spring is placed in the upper cover 2, and the other end of the lifting spring contacts the positioning fulcrum 45. A limiting hole 43 is provided in the middle of the brush holder 11. A limiting frame 34 corresponding to the limiting hole 43 is provided inside the upper cover 2. A limiting rotating shaft 42 is provided in the limiting hole 43. A limiting groove 65 corresponding to the limiting rotating shaft 42 is provided on the limiting frame 34.

[0038] like Figure 5 , Figure 7 As shown, the lifting switch 4 includes a lifting pedal 48 and a lifting shaft 50. The lifting switch 4 is integrally formed. One end of the lifting shaft 50 is installed on one side of the lifting pedal 48. The upper cover 2 is provided with a lifting hole 30 matching the lifting pedal 48. The other end of the lifting shaft 50 and the other side of the lifting pedal 48 are provided with a shaft head 52. The interior of the upper cover 2 is provided with a shaft seat 29 matching the shaft head 52. The interior of the upper cover 2 is provided with a plurality of support frames 31. One end of the support frame 31 is installed in the interior of the upper cover 2. The other end of the support frame 31 is provided with a shaft groove 32 matching the lifting shaft 50. The lifting shaft 50 is provided with a baffle 49. The baffle 49 is provided with a plurality of evenly distributed reinforcing ribs 51. A retaining groove 46 matching the baffle 49 is provided on the brush frame 11 and is located between the limiting hole 43 and the positioning fulcrum 45. A retaining strip 47 is provided on the side of the retaining groove 46 close to the limiting hole 43.

[0039] like Figure 5As shown, the cross-section of the air inlet 33 is L-shaped, and the air inlet 33 includes a first air duct 37 and a second air duct 38, the first air duct 37 and the second air duct 38 are perpendicular to each other, one end of the first air duct 37 is connected to the air inlet 18, the other end of the first air duct 37 is connected to one end of the second air duct 38 by an arc transition, and the other end of the second air duct 38 is connected to the floor brush hanging head 3. An air duct sealing ring 8 is provided between the second air duct 38 and the floor brush hanging head 3, and the air duct sealing ring 8 is made of a heat shrinkable elastic material, and the outer surface of the air duct sealing ring 8 is provided with evenly distributed horizontal grilles 9.

[0040] like Figure 8 As shown, the floor brush hanging head 3 includes a hanging head body 6 and a hanging head air inlet pipe 5, the hanging head body 6 is installed between the upper cover 2 and the bottom cover 1, the hanging head body 6 is provided with an air inlet hole 54, the air duct sealing ring 8 is installed between the second air duct 38 and the air inlet hole 54, the hanging head air inlet pipe 5 is installed on the hanging head body 6 and is rotatably connected to the hanging head body 6, the shape of the hanging head air inlet pipe 5 is L-shaped, the angle of the hanging head air inlet pipe 5 is 45°, and the angle between the hanging head air inlet pipe 5 on the floor brush hanging head 3 and the plane where the bottom cover 1 is located ranges from 25° to 65°. A sealing sleeve 7 is provided on the hanging head body 6 and is placed at the position where the air inlet hole 54 is located. The cross-sectional shape of the sealing sleeve 7 is a waist-shaped hole. The maximum distance of the sealing sleeve 7 is consistent with the diameter of the air inlet hole 54. The air duct sealing ring 8 is installed between the second air duct 38 and the sealing sleeve 7. A positioning ring groove 1 57 and a guide groove 55 are provided on the inner wall of the air inlet hole 54. The guide groove 55 is placed on one end of the air inlet hole 54 and is connected with the positioning ring groove 1 57. A positioning ring groove 2 53 is provided on the outer side surface of one end of the hanging head air inlet pipe 5. A ring-shaped clamping ring is provided in the positioning ring groove 2 53. The ring-shaped clamping ring in the positioning ring groove 2 53 matches the positioning ring groove 1 57 in the air inlet hole 54. An opening is provided on the ring-shaped clamping ring. A positioning baffle 56 is provided on the end of the hanging head air inlet pipe 5 provided with the positioning ring groove 2 53.

[0041] like Fig. 9 As shown, the rear wheel assembly 10 includes a rear roller 58 and a metal shaft 64. Metal shaft seats 36 are provided on the upper cover 2, the bottom cover 1 and the floor brush hanging head 3. The upper cover 2 is provided with a wheel groove 39 matching the rear roller 58. The rear roller 58 is installed at both ends of the metal shaft 64 and placed in the wheel groove 39. The metal shaft 64 is installed on the metal shaft seat 36 of the upper cover 2, the metal shaft seat 36 of the bottom cover 1 and the metal shaft seat 36 of the floor brush hanging head 3. A rear wheel cover plate 61 is provided on the rear roller 58, and annular grooves 63 are provided at both ends of the metal shaft 64. An axle holder 59 is provided in the middle of the rear roller 58, and the axle holder 59 is composed of a plurality of buckles 60. The metal shaft 64 is installed in the axle holder 59, and the buckles 60 are placed in the annular grooves 63. The rear wheel cover plate 61 is installed on the rear roller 58, and a cover plate hole 62 is provided on the rear wheel cover plate 61. The cover plate hole 62 of the rear wheel cover plate 61 is installed on the axle holder 59 of the rear roller 58.

[0042] When in use, dust suction is performed through the air inlet slot 21 on the bottom cover 1, and dust is sucked into the air inlet 18 through the air inlet slot 21 and the air inlet notch 27. The air inlet 18 and the air inlet duct 33 in the upper cover 2 are sealed by the design of the annular groove 67 and the sealing flange 68 to prevent dust from entering between the upper cover 2 and the bottom cover 1; a brush holder 11 and a lifting switch 4 are designed inside the upper cover 2, and whether the floor brush strip 13 needs to be extended or retracted can be selected according to the ground where the dust is located. When the floor brush strip 13 needs to be extended, the operator rotates the lifting shaft 50 through the lifting pedal 48, and the rotation of the lifting shaft 50 causes the block thereon to slide in the blocking groove 46 of the strip brush until the block is buckled on the limit strip 47 for positioning. At this time, the lifting spring is compressed, and the positioning hole 44 on the positioning fulcrum 45 moves along the positioning column 35. At the same time, the limiting hole 44 is pressed against the lifting spring 50 to release the lifting spring. The limiting rotating shaft 42 in 43 rotates in the limiting groove 65 of the limiting frame 34, and the lowering of the positioning fulcrum 45 with the limiting rotating shaft 42 as the center causes the wool strip groove 41 to be pushed out, so that the floor brush hair strip 13 on the wool strip groove 41 extends out of the wool strip cavity 66 and contacts the bottom surface where the dust is located; when it is necessary to retract the floor brush hair strip 13, the operator rotates the lifting rotating shaft 50 through the lifting pedal 48, and the rotation of the lifting rotating shaft 50 causes the stopper thereon to disengage from the limiting strip 47 and slide in the stopper groove 46. Under the action of the spring force of the lifting spring, the positioning hole 44 on the positioning fulcrum 45 moves along the positioning column 35, and at the same time, the limiting rotating shaft 42 in the limiting hole 43 rotates in the limiting groove 65 of the limiting frame 34, and the rising of the positioning fulcrum 45 with the limiting rotating shaft 42 as the center causes the wool strip groove 41 to be retracted, so the floor brush hair strip 13 on the wool strip groove 41 retracts into the wool strip cavity 66. The size of the air inlet 18 is designed to match the air inlet area to ensure maximum flow rate, thereby improving dust collection efficiency.

Claims

1. A vacuum cleaner floor brush, characterized in that: The utility model comprises a bottom cover (1), an upper cover (2) and a floor brush hanging head (3), wherein the bottom cover (1) is mounted on the upper cover (2), an air inlet groove (21) is provided on the bottom cover (1), an air inlet port (18) is provided in the middle of the bottom of the air inlet groove (21), a brush holder (11) and a lifting switch (4) are provided inside the upper cover (2), an air inlet duct (33) matching the air inlet port (18) is provided on the upper cover (2), the brush holder (11) is mounted inside the upper cover (2) and is arranged between the bottom cover (1) and the upper cover (2), a lifting spring is arranged between the brush holder (11) and the upper cover (2), the lifting switch (4) is arranged outside the upper cover (2) and is connected to the brush holder (11), the air inlet duct (33) is arranged in the middle of the brush holder (11), and a hair strip cavity (66) is provided between the bottom cover (1) and the upper cover (2). The brush frame (11) is provided with a floor brush bristle strip (13), the floor brush bristle strip (13) is placed in the bristle strip cavity (66), the upper cover (2) is provided with a rear wheel assembly (10), the floor brush hanging head (3) is mounted on the upper cover (2) and is connected to the air inlet duct (33), the upper cover (2), the bottom cover (1) and the floor brush hanging head (3) are all connected to the rear wheel assembly (10), the cross-sectional shape of the air inlet duct (33) is L-shaped, the air inlet duct (33) comprises a first air duct (37) and a second air duct (38), the first air duct (37) and the second air duct (38) are perpendicular to each other, one end of the first air duct (37) is connected to the air inlet (18), the other end of the first air duct (37) is connected to one end of the second air duct (38) by an arc transition, and the other end of the second air duct (38) is connected to the floor brush hanging head (3).

2. A vacuum cleaner floor brush according to claim 1, characterized in that: The air inlet groove (21) is disposed on the front surface of the bottom cover (1), and air inlet protrusions (26) are provided on the left and right ends of the air inlet groove (21), and an air inlet notch (27) is provided on the air inlet protrusion (26), and the air inlet notch (27) is communicated with the air inlet groove (21).

3. A vacuum cleaner floor brush according to claim 2, characterized in that: An electrostatic slot (22) is provided on the front side of the bottom cover (1) and is located outside the air inlet slot (21). An electrostatic strip is installed in the electrostatic slot (22), and the electrostatic strip is located above the air inlet (18).

4. A vacuum cleaner floor brush according to claim 3, characterized in that: A belt groove (24) is provided on the front side of the bottom cover (1) and is located on the outside of the air inlet groove (21). A floor brush belt (15) is provided in the belt groove (24). A plurality of evenly distributed limit buckles (25) are provided in the belt groove (24). A rotating shaft (14) is provided on one side of the floor brush belt (15). The rotating shaft (14) is placed in the belt groove (24) and is limited in the belt groove (24) by the limit buckle (25). The belt groove (24) is located below the air inlet (18) and corresponds to the position of the electrostatic slot (22) above and below.

5. A vacuum cleaner floor brush according to claim 4, characterized in that: The shape of the air inlet groove (21) is trapezoidal, the upper bottom edge of the air inlet groove (21) is close to the leather groove (24), the lower bottom edge of the air inlet groove (21) is close to the electrostatic groove (22), the length of the upper bottom edge of the air inlet groove (21) is less than the length of the lower bottom edge of the air inlet groove (21), and the depth of the air inlet groove (21) gradually increases from one end close to the air inlet protrusion (26) to one end close to the air inlet port (18).

6. A vacuum cleaner floor brush according to claim 4 or 5, characterized in that: A plurality of evenly distributed connecting ribs (17) are provided on the back side of the bottom cover (1) and at a position between the air inlet (18) and the leather strip groove (24). An arc-shaped groove (23) is provided on the connecting rib (17), and the lifting switch (4) is placed in the arc-shaped groove (23).

7. A vacuum cleaner floor brush according to claim 2, characterized in that: The left and right sides of the upper cover (2) are provided with notches (28) matching the air inlet protrusions (26); the air inlet (18) is provided with an annular groove (67); and a sealing flange (68) matching the annular groove (67) is provided on a port of the air inlet duct (33) communicating with the air inlet (18).

8. A vacuum cleaner floor brush according to claim 1, characterized in that: The front end of the brush holder (11) is provided with a bristle groove (41), the bristle strips (13) of the floor brush are placed in the bristle groove (41), a plurality of evenly distributed limiting buckles (40) are provided in the bristle groove (41), a limiting edge (12) is provided on one side of the bristle strips (13), the limiting edge (12) is placed in the bristle groove (41) and is limited in the bristle groove (41) by the limiting buckles (40), a positioning fulcrum (45) is provided at the rear end of the brush holder (11), a positioning hole (44) is provided on the positioning fulcrum (45), and the inner portion of the upper cover (2) is provided with a positioning hole (44). A positioning column (35) matching the positioning hole (44) is provided on the upper cover (2); the lifting spring is mounted on the positioning column (35); one end of the lifting spring is placed in the upper cover (2); the other end of the lifting spring is in contact with the positioning fulcrum (45); a limiting hole (43) is provided in the middle of the brush holder (11); a limiting frame (34) corresponding to the limiting hole (43) is provided inside the upper cover (2); a limiting rotating shaft (42) is provided in the limiting hole (43); and a limiting groove (65) corresponding to the limiting rotating shaft (42) is provided on the limiting frame (34).

9. A vacuum cleaner floor brush according to claim 8, characterized in that: The lifting switch (4) comprises a lifting pedal (48) and a lifting shaft (50). The lifting switch (4) is integrally formed. One end of the lifting shaft (50) is mounted on one side of the lifting pedal (48). The upper cover (2) is provided with a lifting hole (30) matching the lifting pedal (48). The other end of the lifting shaft (50) and the other side of the lifting pedal (48) are both provided with shaft heads (52). The interior of the upper cover (2) is provided with a shaft seat (29) matching the shaft head (52). The interior of the upper cover (2) is provided with a plurality of support frames (3 1), one end of the support frame (31) is mounted inside the upper cover (2), the other end of the support frame (31) is provided with an axis groove (32) matching with the lifting shaft (50), the lifting shaft (50) is provided with a baffle (49), the baffle (49) is provided with a plurality of evenly distributed reinforcing ribs (51), the brush frame (11) is provided with a baffle groove (46) matching with the baffle (49) at a position between the limiting hole (43) and the positioning fulcrum (45), and the baffle groove (46) is provided with a limiting strip (47) on one side of the baffle groove (46) close to the limiting hole (43).

10. A vacuum cleaner floor brush according to claim 1, characterized in that: An air duct sealing ring (8) is provided between the second air duct (38) and the floor brush hanging head (3); the air duct sealing ring (8) is made of a heat-shrinkable elastic material, and evenly distributed horizontal grilles (9) are provided on the outer surface of the air duct sealing ring (8).

11. A vacuum cleaner floor brush according to claim 10, characterized in that: The floor brush hanging head (3) comprises a hanging head body (6) and a hanging head air inlet pipe (5); the hanging head body (6) is installed between the upper cover (2) and the bottom cover (1); an air inlet hole (54) is provided on the hanging head body (6); the air duct sealing ring (8) is installed between the second air duct (38) and the air inlet hole (54); the hanging head air inlet pipe (5) is installed on the hanging head body (6) and is rotatably connected to the hanging head body (6); the shape of the hanging head air inlet pipe (5) is L-shaped; the included angle of the hanging head air inlet pipe (5) is 45°; and the included angle between the hanging head air inlet pipe (5) on the floor brush hanging head (3) and the plane where the bottom cover (1) is located ranges from 25° to 65°.

12. A vacuum cleaner floor brush according to claim 11, characterized in that: A sealing sleeve (7) is provided on the hanging head body (6) and is located at the position where the air inlet hole (54) is located. The cross-sectional shape of the sealing sleeve (7) is a waist-shaped hole. The maximum distance of the sealing sleeve (7) is consistent with the diameter of the air inlet hole (54). The air duct sealing ring (8) is installed between the second air duct (38) and the sealing sleeve (7). A positioning ring groove (57) and a guide groove (55) are provided on the inner wall of the air inlet hole (54). The guide groove (55) is located A second positioning ring groove (53) is provided on the outer side surface of one end of the hanging head air inlet pipe (5) at one end of the air inlet hole (54) and is connected to the first positioning ring groove (57). An annular clamping ring is provided in the second positioning ring groove (53). The annular clamping ring in the second positioning ring groove (53) matches the first positioning ring groove (57) in the air inlet hole (54). An opening is provided in the annular clamping ring. A positioning baffle (56) is provided on the end of the hanging head air inlet pipe (5) provided with the second positioning ring groove (53).

13. A vacuum cleaner floor brush according to claim 3, characterized in that: A wheel groove (19) is provided on the front side of the bottom cover (1) and is located on the left and right sides of the electrostatic groove (22); mounting grooves (20) are provided on the left and right sides of the wheel groove (19); a front wheel (16) is provided in the wheel groove (19); mounting columns matching the mounting grooves (20) are provided on the left and right sides of the front wheel (16).

14. A vacuum cleaner floor brush according to claim 13, characterized in that: The distance between the plane where the bottom cover (1) is located and the plane formed by the front wheel (16) and the rear wheel assembly (10) is 0.6 mm-1.5 mm.

15. A vacuum cleaner floor brush according to claim 1, characterized in that: The rear wheel assembly (10) comprises a rear roller (58) and a metal shaft (64); the upper cover (2), the bottom cover (1) and the floor brush hanging head (3) are all provided with metal shaft seats (36); the upper cover (2) is provided with a wheel groove (39) matching the rear roller (58); the rear roller (58) is mounted on both ends of the metal shaft (64) and is placed in the wheel groove (39); the metal shaft (64) is mounted on the metal shaft seat (36) of the upper cover (2), the metal shaft seat (36) of the bottom cover (1) and the metal shaft seat (36) of the floor brush hanging head (3).

16. A vacuum cleaner floor brush according to claim 15, characterized in that: The rear roller (58) is provided with a rear wheel cover plate (61), both ends of the metal shaft (64) are provided with annular grooves (63), the middle of the rear roller (58) is provided with an axle holder (59), the axle holder (59) is composed of a plurality of buckles (60), the metal shaft (64) is mounted in the axle holder (59), the buckles (60) are placed in the annular grooves (63), the rear wheel cover plate (61) is mounted on the rear roller (58), the rear wheel cover plate (61) is provided with a cover plate hole (62), and the cover plate hole (62) of the rear wheel cover plate (61) is mounted on the axle holder (59) of the rear roller (58).

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