An automatic dust scraping electric hair dryer

Abstract

The application discloses an automatic dust-scraping electric hair dryer, which comprises an electric hair dryer body, a driving motor arranged in the electric hair dryer body, a dust filtering assembly arranged at the air inlet side of the electric hair dryer body, a guide support, a cylindrical grid-shaped guide part arranged on the guide support, a cylindrical filter screen movably sleeved outside the cylindrical grid-shaped guide part, a reset spring arranged between the cylindrical filter screen and the cylindrical grid-shaped guide part, an extension rod arranged at the center of the end of the cylindrical filter screen and extending to the driving motor side, a linkage sleeve arranged at the end of the extension rod and capable of being coupled with the motor shaft of the driving motor, a grid cover matched with the guide support, a dust scraping piece axially arranged on the end surface of the grid cover, a dust scraping piece arranged at the side of the dust scraping piece and matched with the cylindrical filter screen, a dust storage cavity arranged below the dust scraping piece and opening at the side of the dust scraping piece, and a limiting ring radially arranged outside the opening end of the cylindrical filter screen. The automatic dust-scraping electric hair dryer has higher dust removal efficiency and is more convenient.

Description

Technical Field

[0001] This invention belongs to the field of hair dryer technology, specifically an automatic dust-removing hair dryer. Background Technology

[0002] A hair dryer is a device that uses a motor to drive the fan blades to rotate, thereby causing air to circulate. It has heating wires inside the nozzle and blows out hot air to dry hair more quickly. It is a common household appliance.

[0003] Current hair dryers have a grille at the air inlet to prevent debris from entering the nozzle. Inside the grille, there is usually a small-mesh filter to prevent dust and lint from entering the nozzle, thus preventing them from sticking to the hair and affecting the heating element, or causing them to burn and produce odors. However, after a period of use, the filter may become clogged, increasing resistance and reducing the overall airflow. In current technology, most hair dryer filters are difficult to clean. While some hair dryers have easily removable grilles, allowing users to clean them by wiping the filter, this method still involves some complexity and is not very convenient. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatic dust-scraping hair dryer that can more conveniently remove dust and lint adhering to the filter screen.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automatic dust-scraping hair dryer, comprising a hair dryer body having an air inlet and an air outlet, a drive motor disposed within the hair dryer body, and an air inlet dust filter assembly disposed on the air inlet side of the hair dryer body. The air inlet dust filter assembly includes a guide bracket connected to the air inlet side, and a cylindrical grid-like guide portion disposed on the guide bracket. A cylindrical filter screen is movably sleeved on the cylindrical grid-like guide portion, and the end of the cylindrical filter screen is sealed. A return spring is provided between the cylindrical filter screen and the cylindrical grid-shaped guide portion. An extension rod is provided at the end of the cylindrical filter screen toward the drive motor side. A linkage sleeve is provided at the end of the extension rod that can be sleeved and linked with the motor shaft of the drive motor. A grid cover that cooperates with the guide bracket is provided on the outer sleeve of the cylindrical filter screen. A dust scraper is axially inserted on the end face of the grid cover. A dust scraper blade is provided on the side of the dust scraper that is in contact with the cylindrical filter screen. A dust storage chamber with an opening on the side of the dust scraper blade is provided below the dust scraper blade. A limit ring is provided radially outward at the open end of the cylindrical filter screen. This automatic dust-scraping hair dryer works by pressing the dust scraper inward when dust removal is needed. The dust scraper, pressing against the limiting ring, causes the cylindrical filter to move axially inward until the linkage sleeve engages with the motor shaft of the drive motor. The drive motor then rotates the cylindrical filter, and the dust scraper scrapes off the dust and lint from the outside of the filter and collects it in the dust collection chamber. The dust removal operation is completed after the cylindrical filter rotates several times. After one or more dust removal cycles, the dust scraper can be pulled out and the dust emptied to complete the dust removal operation. This method is more efficient and convenient.

[0006] In the above technical solution, preferably, the dust scraper has a plurality of ventilation holes communicating with the dust storage chamber on the side near the cylindrical filter screen. This structure allows external air to enter from the opening side of the dust storage chamber, pass through the ventilation holes, and then enter the cylindrical filter screen during normal use and dust removal. This enables the airflow to better collect dust and flocculent matter within the dust storage chamber and prevents leakage.

[0007] In the above technical solution, preferably, the dust storage chamber extends to the end of the dust scraper outside the grid cover, and a movable dust removal component is provided inside the dust storage chamber. One end of the dust removal component blocks the opening on the grid cover where the dust scraper extends, and the other end of the dust removal component is provided with a dust scraper rod extending to the other end of the dust storage chamber. This structure allows the dust and lint to be removed by the dust removal component when the dust scraper is removed to process the dust and lint in the dust removal chamber.

[0008] In the above technical solution, preferably, the cylindrical grid-shaped guide portion is provided with an annular limiting portion, and the sealing end of the cylindrical filter screen is provided with a barb that cooperates with the annular limiting portion on the side of the annular limiting portion. The barb engages with the annular limiting portion to limit the maximum axial movement distance of the cylindrical filter screen.

[0009] In the above technical solution, preferably, the cylindrical grid-shaped guide portion is provided with an annular cylindrical sealing portion near the drive motor side. As the cylindrical filter moves axially, the opening side of the cylindrical filter is always located outside the cylindrical sealing portion. This structure prevents unfiltered air from entering between the cylindrical grid-shaped guide portion and the cylindrical filter during the axial movement of the cylindrical filter.

[0010] In the above technical solution, preferably, the opening of the cylindrical filter screen is provided with a magnetic body, the guide bracket is provided with an electromagnet, the hair dryer body is provided with a switch to control the electromagnet to be energized, the electromagnet is energized to make the magnetic body attract the electromagnet, the cylindrical filter screen slides axially to make the linkage sleeve fit into the motor shaft of the drive motor, and the dust scraper is provided with a locking groove that elastically engages with the limiting ring. When the electromagnet is energized, it attracts the cylindrical filter screen to slide axially, causing the linkage sleeve to engage with the motor shaft of the drive motor. The drive motor then rotates the cylindrical filter screen, and the dust scraper scrapes off the dust and lint from the outside of the filter screen, collecting it in the dust collection chamber. The electromagnet can be switched on and off via a switch on the hair dryer, allowing for convenient control of the cylindrical filter screen for dust removal. As the cylindrical filter screen moves, the dust scraper moves along with it, ensuring that the relative positions of the cylindrical filter screen and the dust scraper remain unchanged. The dust scraper can reach all areas of the cylindrical filter screen that need dust removal. When the dust scraper needs to be removed, it can be pulled outwards. The locking groove of the dust scraper can deform elastically to a certain extent, allowing it to be removed smoothly. Similarly, the elastic deformation at the locking groove allows the dust scraper to be installed in place.

[0011] In the above technical solution, preferably, the guide bracket is connected to the air inlet side of the hair dryer body by a snap fastener, and the grille cover is interference-fitted onto the outside of the guide bracket.

[0012] In the above technical solution, preferably, the cylindrical filter screen includes a cylindrical support frame, on which a metal sheet wound into a cylindrical shape is disposed, and the metal sheet is provided with filter holes.

[0013] Compared with the prior art, the present invention has the following advantages: When dust removal is needed, this automatic dust-scraping hair dryer can cause the cylindrical filter screen to move axially by pressing the dust scraper inward until the linkage sleeve engages with the motor shaft of the drive motor. Then the drive motor will drive the cylindrical filter screen to rotate, and the dust scraper will scrape off the dust and lint on the outside of the cylindrical filter screen and collect it in the dust storage chamber. The dust removal operation is completed after the cylindrical filter screen rotates several times. After one or more dust removals by the cylindrical filter screen, the dust scraper can be pulled out and the dust can be emptied to complete the dust removal operation. The dust removal efficiency is higher and it is more convenient. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention.

[0015] Figure 2 This is an exploded structural diagram of an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the structure of the cylindrical filter screen in an embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the guide bracket in an embodiment of the present invention.

[0018] Figure 5 This is a schematic diagram of the structure of the grille cover in an embodiment of the present invention.

[0019] Figure 6 This is an exploded structural diagram of the dust scraper component in an embodiment of the present invention.

[0020] Figure 7 This is a schematic diagram of the airflow direction during dust removal in an embodiment of the present invention.

[0021] Figure 8 This is a partial cross-sectional view of the structure of a hair dryer during normal operation in an embodiment of the present invention.

[0022] Figure 9 This is a partial cross-sectional view of the structure during dust removal using a hair dryer in an embodiment of the present invention. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: See also Figures 1 to 9An automatic dust-removing hair dryer includes a hair dryer body 1, which has an air inlet 11 and an air outlet 12. A drive motor 2 is installed inside the hair dryer body 1 to drive the fan blades to rotate, thereby causing airflow. The hair dryer body 1 also includes a necessary circuit board and air guide structure. An air inlet dust filter assembly 3 is provided on the side of the air inlet 11 of the hair dryer body 1. The air inlet dust filter assembly 3 includes a guide bracket 4 connected to the side of the air inlet 11. A cylindrical grille-shaped guide portion 41 is provided on the guide bracket 4. A cylindrical filter screen 5 is movably sleeved on the cylindrical grille-shaped guide portion 41. The cylindrical filter screen 5 includes a cylindrical support frame 5a, on which a metal sheet 5b wound into a cylindrical shape is provided. The metal sheet 5b has a... The filter screen 5c has a sealed end. A return spring 6 is provided between the cylindrical filter screen 5 and the cylindrical grid-shaped guide part 41. An extension rod 51 is provided at the center of the end of the cylindrical filter screen 5 towards the drive motor 2. A linkage sleeve 52 is provided at the end of the extension rod 51, which can be sleeved and linked with the motor shaft of the drive motor 2. The motor shaft of the drive motor 2 is a non-circular shaft facing the linkage sleeve end 52. The linkage sleeve 52 has a groove that matches the non-circular shaft. A grid cover 7 that cooperates with the guide bracket 4 is provided on the outer sleeve of the cylindrical filter screen 5. A dust scraper 8 is axially inserted on the end face of the grid cover 7. A dust scraper blade 81 is provided on the side of the dust scraper 8 that is in contact with the cylindrical filter screen 5. A dust storage chamber 82 with an opening on the side of the dust scraper blade 81 is provided below the dust scraper blade 81. A limit ring 53 is provided radially outward at the open end of the cylindrical filter screen 5. When dust removal is needed, this automatic dust-scraping hair dryer can move the cylindrical filter 5 axially by pressing the dust scraper 8 inward until the linkage sleeve 52 engages with the motor shaft of the drive motor 2. Then, the drive motor 2 will drive the cylindrical filter 5 to rotate, and the dust scraper 81 will scrape off the dust and lint on the outside of the cylindrical filter 5 and collect it in the dust collection chamber 82. The dust removal operation is completed after the cylindrical filter 5 rotates several times. After one or more dust removals of the cylindrical filter 5, the dust scraper 8 can be pulled out and the dust can be emptied to complete the dust removal operation. The dust removal efficiency is higher and more convenient.

[0024] In this embodiment, the dust scraper 8 has several ventilation holes 83 connected to the dust collection chamber 82 near the cylindrical filter screen 5. This structure allows external air to enter from the opening side of the dust collection chamber 82, pass through the ventilation holes 83, and then enter the cylindrical filter screen 5 during normal use of the blower and dust removal. This enables the airflow to better collect dust and lint within the dust collection chamber 82 and prevents leakage.

[0025] In this embodiment, the dust storage chamber 82 extends to the end of the dust scraper 8 outside the grid cover 7. A movable dust removal component 84 is provided inside the dust storage chamber 82. One end of the dust removal component 84 blocks the opening through which the dust scraper 8 extends on the grid cover 7, and the other end of the dust removal component 84 is provided with a dust scraper rod 85 extending to the other end of the dust storage chamber 82. With this structure, when the dust scraper 8 is removed to process the dust and lint in the dust removal chamber 82, the dust and lint can be removed by the dust removal component 84.

[0026] In this embodiment, an annular limiting part 42 is provided on the cylindrical grid-shaped guide part 41, and a barb 55 that cooperates with the annular limiting part 42 is provided on the sealing end of the cylindrical filter screen 5 towards the annular limiting part 42. The barb 55 engages with the annular limiting part 42 to limit the maximum axial movement distance of the cylindrical filter screen 5.

[0027] In this embodiment, a ring-shaped cylindrical sealing portion 43 is provided on the cylindrical grid-shaped guide portion 41 near the drive motor 2. As the cylindrical filter screen 5 moves axially, the opening side of the cylindrical filter screen 5 is always located outside the cylindrical sealing portion 43. This structure prevents unfiltered air from entering between the cylindrical grid-shaped guide portion 41 and the cylindrical filter screen 5 during the axial movement of the cylindrical filter screen 5.

[0028] To facilitate dust removal, in this embodiment, the opening of the cylindrical filter 5 is provided with a magnetic body 54, the guide bracket 4 is provided with an electromagnet 44, and the hair dryer body 1 is provided with a switch 13 to control the electromagnet 44 to be energized. When the electromagnet 44 is energized, the magnetic body 54 is attracted to the electromagnet 44, and the cylindrical filter 5 slides axially so that the linkage sleeve 52 is fitted into the motor shaft of the drive motor 2. The dust scraper 8 is provided with a locking groove 86 that elastically engages with the limiting ring 53, and the magnetic body 54 is also part of the limiting ring 53. When the electromagnet 44 is energized, it attracts the cylindrical filter screen 5 to slide axially, causing the linkage sleeve 52 to engage with the motor shaft of the drive motor 2. The drive motor 2 then rotates the cylindrical filter screen 5, and the dust scraper 81 scrapes off the dust and lint from the outside of the filter screen 5, collecting it in the dust collection chamber 82. The electromagnet 44 can be switched on and off via the switch 13 on the hairdryer body 1, thus conveniently controlling the dust removal process of the cylindrical filter screen 5. During movement, the cylindrical filter screen 5 moves along with the dust scraper 8, ensuring that their relative positions remain constant. The dust scraper 8 scrapes all areas of the cylindrical filter screen 5 where dust needs to be scraped. When the dust scraper needs to be removed, it is simply pulled outwards. The engaging groove 86 of the dust scraper 8 allows for a certain degree of elastic deformation, facilitating its removal. Similarly, the elastic deformation at the engaging groove 86 allows the dust scraper 8 to be installed correctly during insertion.

[0029] In this embodiment, the guide bracket 4 is connected to the air inlet 11 side of the hair dryer body 1 by a snap-fit, and the grille cover 7 is interference-fitted onto the outside of the guide bracket 4. This structure allows for convenient fixing of the guide bracket 4.

[0030] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automatic dust-removing hair dryer, comprising a hair dryer body (1), wherein the hair dryer body (1) has an air inlet (11) and an air outlet (12), wherein a drive motor (2) is disposed inside the hair dryer body (1), and an air inlet filter assembly (3) is disposed on the side of the air inlet (11) of the hair dryer body (1), characterized in that: The air intake dust filter assembly (3) includes a guide bracket (4), which is connected to the air inlet (11). A cylindrical grid-shaped guide part (41) is provided on the guide bracket (4), and a cylindrical filter screen (5) is movably sleeved on the cylindrical grid-shaped guide part (41). The end of the cylindrical filter screen (5) is sealed, and a return spring (6) is provided between the cylindrical filter screen (5) and the cylindrical grid-shaped guide part (41). An extension rod (51) is provided at the center of the end of the cylindrical filter screen (5) toward the drive motor (2). The end of the rod (51) is provided with a linkage sleeve (52) that can be sleeved and linked with the motor shaft of the drive motor (2). The cylindrical filter (5) is covered with a grid cover (7) that cooperates with the guide bracket (4). A dust scraper (8) is axially inserted on the end face of the grid cover (7). A dust scraper (81) is provided on the side of the dust scraper (8) that is in contact with the cylindrical filter (5). A dust storage chamber (82) with an opening on the side of the dust scraper (81) is provided below the dust scraper (81). A limit ring (53) is provided radially outward at the opening end of the cylindrical filter (5).

2. The automatic dust-scraping hair dryer as described in claim 1, characterized in that: The dust scraper (8) has several ventilation holes (83) that communicate with the dust storage chamber (82) on the side near the cylindrical filter screen (5).

3. The automatic dust-scraping hair dryer as described in claim 1, characterized in that: The dust storage chamber (82) extends to the end of the dust scraper (8) outside the grid cover (7). A movable dust cleaning component (84) is provided inside the dust storage chamber (82). One end of the dust cleaning component (84) blocks the opening into which the dust scraper (8) extends on the grid cover (7). The other end of the dust cleaning component (84) is provided with a dust scraper rod (85) extending to the other end of the dust storage chamber (82).

4. The automatic dust-scraping hair dryer as described in claim 1, characterized in that: The cylindrical grid-shaped guide portion (41) is provided with an annular limiting portion (42), and the sealing end of the cylindrical filter (5) is provided with a barb (55) that cooperates with the annular limiting portion (42) on the side of the annular limiting portion (42). The barb (55) engages with the annular limiting portion (42) to limit the maximum axial movement distance of the cylindrical filter (5).

5. The automatic dust-scraping hair dryer as described in claim 4, characterized in that: The cylindrical grid-shaped guide part (41) is provided with an annular cylindrical sealing part (43) near the drive motor (2). As the cylindrical filter (5) moves axially, the opening side of the cylindrical filter (5) is always located outside the cylindrical sealing part (43).

6. The automatic dust-scraping hair dryer as described in claim 1, characterized in that: The opening of the cylindrical filter (5) is provided with a magnetic body (54), the guide bracket (4) is provided with an electromagnet (44), the hair dryer body (1) is provided with a switch (13) to control the electromagnet (44) to be energized, the electromagnet (44) is energized so that the magnetic body (54) and the electromagnet (44) are attracted together, the cylindrical filter (5) slides axially so that the linkage sleeve (52) is fitted into the motor shaft of the drive motor (2), and the dust scraper (8) is provided with a locking groove (86) that elastically engages with the limiting ring (53).

7. The automatic dust-scraping hair dryer as described in claim 1, characterized in that: The guide bracket (4) is connected to the air inlet (11) side of the hair dryer body (1) by a snap fastener, and the grille cover (7) is interference-fitted onto the outside of the guide bracket (4).

8. The automatic dust-scraping hair dryer as described in claim 1, characterized in that: The cylindrical filter (5) includes a cylindrical support frame (5a), on which a metal sheet (5b) wound into a cylindrical shape is provided, and filter holes (5c) are provided on the metal sheet (5b).

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