Filter screen plate anti-blocking structure of blower

Abstract

The filter screen plate anti-blocking structure comprises an air duct body, the front end of the air duct body is provided with an air outlet, and the rear end of the air duct body is provided with an air inlet; a rear cover is detachably mounted on the air inlet, the front end of the rear cover is connected with the air inlet through a connecting structure, and a filter screen plate with filter holes is arranged at the rear end of the rear cover; a movable screen plate capable of moving back and forth is arranged in the rear cover, and ejector pins corresponding to the filter holes are densely distributed on the movable screen plate; a driving assembly is arranged on the rear cover and used for driving the movable screen plate to move backwards, so that the ejector pins penetrate through the filtering holes to eject blockages out, and immediate cleaning is achieved; the structure is dredged through the ejector pins, online cleaning can be achieved without disassembly, the filter screen plate is effectively prevented from being blocked, and smooth air inlet is ensured. Maintenance is simplified, convenience is improved, blockages can be removed in time, overload and overheating of the motor are avoided, and the service life of the blower is prolonged. Meanwhile, the structure is ingenious, by means of the detachable rear cover and the built-in movable screen plate, the air duct body does not need to be greatly changed, and production and assembly are easy; stable air inlet is beneficial to internal heat dissipation, and the operation safety is improved.

Description

Technical Field

[0001] This invention relates to the field of hair dryer technology, and in particular to an anti-clogging structure for the filter screen of a hair dryer. Background Technology

[0002] Hair dryers, as a common hair care tool, work by using an internal motor to drive a fan to draw in air through the inlet, heat it through an internal heating element, and then blow hot air out through the outlet. To prevent hair, dust, and other debris from being drawn in during the air intake process, which could damage the internal motor or affect heating safety, current hair dryers usually have a filter screen at the air inlet.

[0003] However, in actual use, while the filter can block debris, its mesh is easily clogged by lint, hair, and dust. Traditional hair dryers often have fixed filters; once clogged, this leads to poor airflow, reduced air volume, unstable temperature, and even shortened lifespan due to excessive motor load. Users need to manually disassemble and clean the filter periodically, a tedious and easily forgotten process. Failure to clean it promptly can affect the normal operation of the hair dryer, presenting certain limitations. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes an anti-clogging structure for the filter plate of a hair dryer.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A filter screen anti-clogging structure for a hair dryer includes a main body with an air outlet at the front end and an air inlet at the rear end. A rear cover is detachably installed on the air inlet. The rear cover has a cylindrical structure, with a connecting structure between the front end of the rear cover and the air inlet. A filter screen is provided at the rear end, with filter holes densely distributed on the filter screen. A movable screen plate that moves back and forth is provided inside the rear cover. The movable screen plate is densely distributed with pins corresponding to the filter holes. A driving assembly is also provided on the rear cover. The driving assembly is used to drive the movable screen plate to move rearward, thereby allowing the pins to pass through the filter holes.

[0007] In some embodiments, a plurality of guide posts are evenly distributed along the circumference on the inner side of the filter screen, and a plurality of guide holes corresponding to the guide posts are provided on the movable screen, with each guide hole correspondingly sleeved on the guide post.

[0008] In some embodiments, a plurality of extension plates corresponding to guide posts are evenly distributed along the circumference of the outer wall of the movable mesh plate, and each guide hole is correspondingly provided on each of the extension plates.

[0009] In some embodiments, a limiting plate is provided at the end of the guide post away from the filter screen.

[0010] In some embodiments, a return spring is fitted on each of the guide posts, with one end of the return spring abutting against the extension plate and the other end abutting against the filter screen plate.

[0011] In some embodiments, the driving assembly includes a rotating ring rotatably fitted onto the wall of the rear cover, and a plurality of driving members corresponding to the extension plate are provided on the inner wall of the rotating ring. The driving members extend into the rear cover, and the driving members can push the extension plate to move rearward by rotating the rotating ring.

[0012] In some embodiments, the driving member includes a sliding block disposed on the inner wall of the rotating ring and a driving inclined plate disposed on the sliding block, the inclined part of the driving inclined plate abutting against one side of the extension plate, and a sliding groove for the sliding block to slide is provided on the wall surface of the rear cover.

[0013] In some embodiments, an annular groove for the rotating ring to rotate is provided on the wall surface of the rear cover, and the sliding groove is located in the annular groove.

[0014] In some embodiments, the outer wall of the rotating ring is provided with anti-slip texture.

[0015] In some embodiments, the connecting structure includes a connecting cylinder with external threads located at the rear end of the air inlet, and an internal thread that engages with the connecting cylinder is provided on the inner wall of the front end of the rear cover.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This structure features a movable mesh plate that can move back and forth inside the rear cover. The movable mesh plate is driven to move backward by a drive assembly, allowing the ejector pin to pass through the filter holes of the filter mesh plate. This action can directly eject foreign objects that are blocking the filter holes, achieving immediate cleaning without disassembly. This effectively prevents the filter mesh plate from becoming clogged and ensures that the air inlet remains unobstructed.

[0018] 2. Users can clean the filter screen without frequently disassembling and reassembling the back cover, greatly simplifying daily maintenance steps and improving ease of use; at the same time, because it can remove blockages in time, it avoids motor overload and overheating caused by poor air intake, thereby extending the overall service life of the hair dryer.

[0019] 3. The anti-clogging structure is ingeniously designed, relying on a detachable back cover and a built-in movable mesh plate. It does not require major modifications to the main body of the blower, making it easy to manufacture and assemble. By ensuring smooth air intake, it maintains a stable airflow in the internal air duct of the blower, which helps prevent overheating of internal components due to poor heat dissipation and improves the safety and reliability of the blower's operation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the hair dryer of the present invention.

[0021] Figure 2 This is a cross-sectional view of the rear cover of the present invention when it is installed at the air inlet.

[0022] Figure 3 This is a three-dimensional structural diagram of the back cover of the present invention.

[0023] Figure 4 This is an exploded structural diagram of the back cover of the present invention.

[0024] Figure 5 This is one of the structural schematic diagrams of the movable mesh plate and filter mesh plate of the present invention.

[0025] Figure 6 This is the second schematic diagram of the structure of the movable mesh plate and the filter mesh plate of the present invention. Detailed Implementation

[0026] The following detailed description provides various embodiments or examples for carrying out the present invention. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0027] like Figures 1-6 The illustrated anti-clogging structure of a hair dryer filter includes a main body 1, with an air outlet 2 at the front end and an air inlet 3 at the rear end. A rear cover 4 is detachably installed on the air inlet 3. The rear cover 4 is cylindrical, with a connecting structure between the front end of the rear cover 4 and the air inlet 3. A filter plate 5 is provided at the rear end, with filter holes 6 densely distributed on the filter plate 5. A movable mesh plate 7 is provided inside the rear cover 4, with pins 8 densely distributed on the movable mesh plate 7 corresponding to the filter holes 6. A driving assembly is also provided on the rear cover 4, which drives the movable mesh plate 7 to move rearward, thereby allowing the pins 8 to pass through the filter holes 6.

[0028] When the hair dryer is working normally, outside air enters from the rear end of the back cover 4, is filtered by the filter holes 6 on the filter screen 5, enters the air inlet 3 of the main body 1, and is finally blown out from the air outlet 2. During this process, foreign objects such as hair, lint, and dust in the air will be intercepted by the filter screen 5, and some small debris may be blocked in the filter holes 6.

[0029] When it is necessary to clean the filter screen 5 to prevent clogging, the user operates the drive assembly located on the rear cover 4. The drive assembly starts working, driving the movable screen 7 located inside the rear cover 4 to move rearward (i.e., away from the air duct body 1).

[0030] As the movable screen plate 7 moves backward, the pins 8 densely distributed on the movable screen plate 7 also move backward synchronously. Since the pins 8 are correspondingly set with the filter holes 6 on the filter screen plate 5, the moving pins 8 will gradually insert into and pass through the corresponding filter holes 6.

[0031] As the ejector pin 8 passes through the filter hole 6, the end of the ejector pin 8 pushes out the foreign objects that were originally blocking the filter hole 6, thus removing them from the filter hole 6 and achieving immediate unblocking of the filter hole. After cleaning, the movable screen plate 7 is reset, the ejector pin 8 is withdrawn from the filter hole 6, and the filter screen plate 5 returns to an unobstructed state, ready for the next filtration operation.

[0032] In addition, when a thorough cleaning of the entire filter structure is required, the rear cover 4 can be removed from the air inlet 3 using the detachable connection structure between the rear cover 4 and the air inlet 3. The filter screen 5, movable screen 7 and pin 8 can be wiped or rinsed thoroughly. After cleaning, the rear cover 4 can be reinstalled on the air inlet 3 through the connection structure to achieve recycling, which not only ensures the filtration effect but also reduces the difficulty of maintenance.

[0033] See Figures 2-6 As shown, a plurality of guide posts 21 are evenly distributed along the circumference on the inner side of the filter screen plate 5. A plurality of guide holes 22 corresponding to the guide posts 21 are provided on the movable screen plate 7. Each guide hole 22 is fitted onto the guide post 21. A plurality of extension plates 31 corresponding to the guide posts 21 are evenly distributed along the circumference on the outer wall of the movable screen plate 7. Each guide hole 22 is fitted onto each extension plate 31. A limit plate 41 is provided at the end of the guide post 21 away from the filter screen plate 5. A return spring 51 is fitted onto each guide post 21. One end of the return spring 51 abuts against the extension plate 31, and the other end abuts against the filter screen plate 5.

[0034] Specifically, since several guide posts 21 are evenly distributed along the circumference on the inner side of the filter plate 5, and the movable screen plate 7 is provided with corresponding guide holes 22, and each guide hole 22 is fitted onto the guide post 21; therefore, when the drive assembly drives the movable screen plate 7 to move backward, the movable screen plate 7 will slide smoothly along the axial direction of the guide post 21, ensuring that the ejector pin 8 can be accurately inserted into the corresponding filter hole 6, avoiding offset or jamming.

[0035] As the movable screen plate 7 moves backward, the return spring 51 sleeved on the guide post 21 is compressed. At this time, one end of the return spring 51 abuts against the movable extension plate 31, and the other end abuts against the fixed filter screen plate 5. Therefore, the spring is gradually compressed and accumulates elastic potential energy. When the cleaning is completed and the force of the driving component disappears, the compressed return spring 51 will release elastic potential energy, pushing the extension plate 31 (i.e. driving the entire movable screen plate 7) forward, so that it automatically returns to the initial position. At the same time, the limiting plate 41 set at the end of the guide post 21 away from the filter screen plate 5 can prevent the movable screen plate 7 from slipping off the guide post 21 due to excessive stroke during the reset or movement, thus playing a limiting protection role.

[0036] Thus, this structure enables precise guidance and automatic reset of the movable mesh plate 7, simplifies user operation, and improves the stability of the structure's operation.

[0037] In this invention, the driving assembly includes a rotating ring 61 rotatably sleeved on the wall of the rear cover 4. A plurality of driving members 62 corresponding to the extension plate 31 are provided on the inner wall of the rotating ring 61. The driving members 62 extend into the rear cover 4, and the driving members 62 can push the extension plate 31 to move backward by rotating the rotating ring 61.

[0038] The driving component 62 includes a sliding block 71 disposed on the inner wall of the rotating ring 61 and a driving inclined plate 72 disposed on the sliding block 71. The inclined part of the driving inclined plate 72 abuts against one side of the extension plate 31, and a sliding groove 73 for the sliding block 71 to slide is provided on the wall of the rear cover 4.

[0039] When the user needs to clean the filter screen 5, the operation method is to manually rotate the rotating ring 61 set on the wall of the rear cover 4. As the rotating ring 61 rotates, several driving components 62 fixed on its inner wall will rotate together. Since the driving component 62 extends into the interior of the rear cover 4, and the inclined surface of its front end driving inclined plate 72 abuts against one side of the extension plate 31, the contact point between the inclined surface of the driving inclined plate 72 and the extension plate 31 will change when the driving component 62 rotates with the rotating ring 61. Specifically, the inclined surface structure of the driving inclined plate 72 will convert the circumferential rotation of the rotating ring 61 into an axial thrust on the extension plate 31. This thrust acts on the extension plate 31, overcomes the elastic force of the return spring 51, and pushes the entire movable screen 7 to move backward (i.e., towards the filter screen 5) along the guide post 21, so that the ejector pin 8 passes through the filter hole 6 and pushes out the blockage. Throughout the rotation process, the sliding block 71 slides within the groove 73 on the wall of the rear cover 4. The groove 73 provides guidance and limitation for the sliding block 71, ensuring that the drive component 62 can smoothly move in a circular motion along a predetermined trajectory. This ensures that the drive ramp 72 can accurately and stably push the extension plate 31. After cleaning is completed and the rotating ring 61 is released, the reset spring 51 releases its elastic force, pushing the extension plate 31 forward to reset. At the same time, the extension plate 31 pushes the drive ramp 72 back, causing the rotating ring 61 and the drive component 62 to automatically rotate back to the initial position, waiting for the next operation.

[0040] Thus, users can perform the puncture and cleaning action of the internal ejector pin 8 simply by rotating the rotating ring 61 on the outside of the back cover 4. Compared to operation methods that require pressing or flicking other mechanisms, the rotation operation is more ergonomic, applies force more smoothly, and requires less effort.

[0041] Furthermore, an annular groove 81 for the rotating ring 61 to rotate is provided on the wall surface of the rear cover 4, and the sliding groove 73 is provided in the annular groove 81.

[0042] By providing an annular groove 81 on the wall of the rear cover 4, a precise rotation track is provided for the rotating ring 61, which can maintain stability during rotation, avoid shaking or jamming, and improve the reliability of the drive component's operation and the smoothness of operation.

[0043] The outer wall of the rotating ring 61 is provided with anti-slip texture. By providing anti-slip texture on the outer wall of the rotating ring 61, the coefficient of friction between the user's fingers and the rotating ring 61 is increased, so that the user can apply force more effort when rotating, effectively preventing fingers from slipping, and can easily operate even when hands are wet or oily.

[0044] See Figures 1-3 As shown, the connection structure includes a connecting cylinder 10 with external threads located at the rear end of the air inlet 3, and an internal thread that engages with the connecting cylinder 10 on the inner wall of the front end of the rear cover 4.

[0045] When installing the back cover 4, the user aligns the opening at the front of the back cover 4 with the air inlet 3 at the rear of the air duct body 1. At this time, the internal thread on the inner wall of the front of the back cover 4 corresponds to the external thread on the connecting cylinder 10. The user then rotates the back cover 4, and through the threaded engagement between the internal thread and the external thread of the connecting cylinder 10, the back cover 4 is gradually tightened onto the connecting cylinder 10 until the front face of the back cover 4 abuts against the corresponding part of the air duct body 1, completing the installation. This threaded connection structure ensures that the back cover 4 is securely fixed to the air duct body 1, preventing it from loosening during use.

[0046] When the rear cover 4 needs to be removed for deep cleaning or maintenance, the user only needs to rotate the rear cover 4 in the opposite direction to disengage the internal threads from the external threads, and then the rear cover 4 can be removed from the air inlet 3. This threaded connection structure is simple and reliable, ensuring both the stability of the connection and facilitating quick disassembly and assembly by the user.

[0047] Based on the accompanying drawings and the foregoing illustrations and descriptions, the basic principles and main features of the present invention, as well as its advantages, those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter screen anti-clogging structure for a hair dryer, comprising a blower body (1), wherein the blower body (1) has an air outlet (2) at its front end and an air inlet (3) at its rear end, characterized in that: A rear cover (4) is detachably installed on the air inlet (3). The rear cover (4) is a cylindrical structure. A connecting structure is provided between the front end of the rear cover (4) and the air inlet (3). A filter screen (5) is provided at the rear end. The filter screen (5) is densely covered with filter holes (6). A movable screen (7) is provided inside the rear cover (4). The movable screen (7) is densely covered with pins (8) corresponding to the filter holes (6). A driving component is also provided on the rear cover (4). The driving component is used to drive the movable screen (7) to move backward, so that the pins (8) pass through the filter holes (6).

2. The anti-clogging structure of the filter plate of a hair dryer according to claim 1, characterized in that: Several guide posts (21) are evenly distributed along the circumference on the inner side of the filter screen (5), and several guide holes (22) corresponding to the guide posts (21) are provided on the movable screen (7), with each guide hole (22) correspondingly fitted onto the guide post (21).

3. The anti-clogging structure of the filter plate of a hair dryer according to claim 2, characterized in that: A number of extension plates (31) corresponding to the guide posts (21) are evenly distributed along the circumference of the outer wall of the movable mesh plate (7), and each guide hole (22) is correspondingly provided on each extension plate (31).

4. The anti-clogging structure of the filter plate of a hair dryer according to claim 3, characterized in that: A limiting plate (41) is provided at the end of the guide post (21) away from the filter screen (5).

5. The anti-clogging structure of the filter plate of a hair dryer according to claim 4, characterized in that: A reset spring (51) is fitted on each of the guide posts (21). One end of the reset spring (51) abuts against the extension plate (31), and the other end abuts against the filter screen plate (5).

6. The anti-clogging structure of the filter plate of a hair dryer according to claim 5, characterized in that: The drive assembly includes a rotating ring (61) that is rotatably sleeved on the wall of the rear cover (4). A plurality of drive members (62) corresponding to the extension plate (31) are provided on the inner wall of the rotating ring (61). The drive members (62) extend into the rear cover (4), and the drive members (62) can push the extension plate (31) to move backward by rotating the rotating ring (61).

7. The anti-clogging structure of the filter plate of a hair dryer according to claim 6, characterized in that: The driving component (62) includes a sliding block (71) disposed on the inner wall of the rotating ring (61) and a driving inclined plate (72) disposed on the sliding block (71). The inclined part of the driving inclined plate (72) abuts against one side of the extension plate (31), and a sliding groove (73) for the sliding block (71) to slide is provided on the wall of the rear cover (4).

8. The anti-clogging structure of the filter plate of a hair dryer according to claim 7, characterized in that: The wall surface of the rear cover (4) is provided with an annular groove (81) for the rotating ring (61) to rotate, and the sliding groove (73) is located in the annular groove (81).

9. The anti-clogging structure of the filter plate of a hair dryer according to claim 6, characterized in that: Anti-slip texture is provided on the outer wall of the rotating ring (61).

10. The anti-clogging structure of the filter plate of a hair dryer according to claim 1, characterized in that: The connection structure includes a connecting cylinder (10) with external threads located at the rear end of the air inlet (3), and an internal thread that engages with the connecting cylinder (10) on the inner wall of the front end of the rear cover (4).

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