An air inlet structure of a hair styling appliance

Abstract

The utility model discloses an air inlet structure of hair styling appliance. It includes: air duct body, the head of air duct body is equipped with air duct body air outlet, the tail of air duct body is equipped with air duct body air inlet, the inside of air duct body is sequentially provided with heating module and fan module along the central axis thereof, handle shell, one end of handle shell is sleeved on air duct body and is sealed and fixedly connected with it, handle shell is located one side close to air duct body air inlet, and the other end of handle shell is fixedly provided with air inlet tail cover, and air inlet tail cover and air duct body air inlet are oppositely arranged. The utility model has the beneficial effects of: can improve user experience effect.

Description

Technical Field

[0001] This utility model relates to the technical field of hair styling tools, and in particular to an air intake structure for a hair styling tool. Background Technology

[0002] Hair styling equipment mainly includes various tools used for daily and professional styling, which achieve different styling effects mainly by physically manipulating or heating and softening the hair.

[0003] The development of traditional hair styling equipment has long been limited by homogenized design concepts and technical solutions, resulting in insufficient innovation momentum in the industry and a homogenized market competition. Existing hair styling devices often use external surface openings for air intake, which leads to problems such as hands blocking the air intake and affecting air intake efficiency, resulting in a decreased user experience.

[0004] In conclusion, there is a need for an air intake structure in hair styling tools that can improve the user experience. Utility Model Content

[0005] The present invention aims to overcome the shortcomings of the prior art and provide an air intake structure for a hair styling tool that can improve the user experience.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An air intake structure for a hair styling tool includes: The air duct body has an air outlet at its head and an air inlet at its tail. A heating module and a fan module are arranged sequentially along its central axis on the inner side of the air duct body. The handle housing has one end fitted onto the air duct body and is sealed and fixedly connected thereto. The handle housing is located on the side near the air inlet of the air duct body. An air inlet tail cover is installed and fixed at the other end of the handle housing. The air inlet tail cover and the air inlet of the air duct body are arranged opposite to each other.

[0007] Airflow enters through the air inlet cap at the tail of the handle housing, flows into the air inlet of the air duct body, passes through the fan module and heating module in sequence to be heated, and then blows out from the air outlet of the air duct body at the head of the air duct body to achieve the hair styling needs. This utility model uses the air inlet cap at the tail of the handle housing as the airflow inlet, which can avoid the hand-held area and prevent the air inlet from being blocked, thus improving the user experience. At the same time, it avoids the risk of hair being sucked into the surface of the hand-held area, and also optimizes the overall appearance of the device and the smoothness of the airflow.

[0008] Preferably, an air outlet cover is fitted onto the air duct body. The air outlet cover is fixedly installed on the side near the air outlet of the air duct body. The end face of the air outlet cover and the air outlet of the air duct body are opposite each other and have air outlet holes. The central axis of the air outlet cover, the central axis of the handle housing, and the central axis of the air duct body are all on the same straight line. The outer diameter of the air outlet cover and the outer diameter of the handle housing are the same. In this utility model, the air inlet is located on the tail end face of the handle housing, and the air outlet is located on the end face of the air outlet cover. The outer surface has no air inlet mesh or related features, allowing the user to hold the device anywhere on the body without obstructing the air inlet. This ensures that the air intake of the device is completely unaffected and facilitates user operation. At the same time, the handle housing adopts an integrated design. The seamless design without air inlets on the outer surface represents a fundamental innovation in safety compared to existing hair styling tools, enhancing the product's visual recognition and differentiated competitiveness.

[0009] Preferably, a bracket is fixed on the air duct body, and the handle housing is installed and fixed on the outside of the bracket. The bracket is located between the air inlet and the air inlet tail cover of the air duct body. The bracket is provided with a main control PCBA board slot, and a main control PCBA board is installed in the main control PCBA board slot. A power cord is connected to the main control PCBA board. A power cord holder matching the power cord is installed and fixed on the bracket. A main control PCBA board holder is fixed on the power cord holder. The main control PCBA board holder limits and fixes the main control PCBA board at the main control PCBA board slot through the main control PCBA board holder. The main control PCBA board holder is provided with a power on / off switch slot, and a power on / off switch is installed in the power on / off switch slot. The power on / off switch is located on the side near the air inlet tail cover. During installation, the main control PCBA board is installed in the main control PCBA board slot of the bracket. The power cord is secured by the power cord holder, and the main control PCBA board is closed and secured by the main control PCBA board clamping block on the power cord holder. Then, the power on / off switch is installed in the power on / off switch slot of the power cord holder. The installation scheme of the slot + clamping block effectively limits and fixes the main control PCBA board, achieving the simplest installation. The screwless installation reduces the number of internal components by about 10% compared to competing products. This minimizes the structural impact of the main control PCBA board on the installation space, maximizes the effective usable area of ​​the board, and optimizes airflow. At the same time, the integrated design of the power cord clamping plate and the on / off switch reduces the number of parts and simplifies the installation process, taking into account structural stability, space utilization, production efficiency, and cost advantages, thereby improving the overall performance of the product.

[0010] Preferably, the inner wall of the handle housing and the outer wall of the air duct body are sealed together by a sealing ring. The sealing ring is fitted onto the air duct body and fixed to the side near the air inlet of the air duct body. The outer wall of the sealing ring is provided with several sealing ribs that are in close contact with the handle housing. The sealing ring fitted onto the air duct body forms a double-layer sealing structure with the inner wall of the handle housing through the multiple sealing ribs on the outer wall. This facilitates the installation of the handle housing and ensures a good seal, effectively preventing whistling and turbulence problems caused by unsealed local air passages, avoiding airflow loss and noise degradation caused by high-speed airflow leakage, and eliminating the impact of air intake or exhaust from other parts on the overall airflow stability and noise performance, thus ensuring smooth airflow and quiet operation.

[0011] Preferably, the outer edge of the air inlet cap and the other end of the handle housing are interlocked and fixed together. The air inlet cap gradually concaves inward from its edge to the center towards one end of the handle housing. The air inlet cap has several air inlet mesh holes, which are circumferentially distributed about its central axis. The air inlet cap adopts a recessed, built-in design, its overall shape resembling a frustum placed inside the handle housing. This effectively avoids the risk of hair being sucked into the handheld area, improving safety and making the outer surface of the handle housing seamless without air inlets. Compared to existing hair styling tools, this represents a fundamental innovation in safety, making it more convenient for users to use. The handheld position is not restricted, and the phenomenon of the hand blocking the opening, common with other styling tools, is avoided, resulting in better air intake reliability. The air inlet mesh holes are evenly distributed axially on the inner surface of the air inlet cap. The mesh holes are relatively large, primarily filtering large particles to prevent large debris from entering.

[0012] Preferably, a first buckle is fixed to the inner side of the other end of the handle housing, and a first groove matching the first buckle is provided on the outer edge of the air inlet cap. The air inlet cap is rotated and fixed to the handle housing through the cooperation of the first groove and the first buckle. The structure is simple, the air inlet cap is easy and quick to install and remove, and the number of parts is minimized.

[0013] Preferably, a filter screen is provided on the air inlet cap, which is fitted onto the air inlet cap. The filter screen has a mesh diameter ≤0.3mm and a mesh spacing of 0.4mm~0.45mm. The filter screen is fixedly mounted on a bracket. The filter screen and the main control PCBA board are designed with a staggered front-to-back layout. This design fundamentally distinguishes it from the current competing product's method of wrapping metal filters around live modules, thus enhancing insulation and eliminating electrical safety risks caused by the insulation of the molding machine. The filter screen covering the air inlet cap prevents fine particles or filamentous objects such as hair from entering. The filter screen has a diameter ≤0.3mm, which can prevent fine particles from entering. The mesh spacing of 0.4~0.45mm ensures that the ratio of the air inlet area of ​​the filter screen to the air duct area at the fan module is ≥1.5:1, ensuring smooth airflow at high speeds into the molding machine.

[0014] Preferably, a limiting guide post is provided at the end of the bracket away from the air duct body. The air inlet cap and the filter screen are both fitted onto the limiting guide post. A second buckle is fixed on the outer wall of the limiting guide post. A second groove matching the second buckle is provided on the filter screen. The filter screen is rotated and fixed to the limiting guide post at the end of the bracket through the cooperation of the second groove and the second buckle. The operation is simple, efficient, and minimizes the number of parts.

[0015] Preferably, the ratio between the air inlet area on the air inlet cap and the air duct area at the fan module is 2:1 to 1.25:1, ensuring sufficient air intake and low noise performance of the stylist. The ratio between the air inlet area on the filter screen and the air duct area at the fan module is 3:1 to 1.5:1, ensuring smooth airflow path for high-speed airflow into the stylist.

[0016] The beneficial effects of this utility model are: the airflow inlet avoids the handheld area, preventing the air inlet from being blocked, thus improving the user experience and avoiding the risk of hair being sucked into the handheld area; it optimizes the overall appearance of the device and the smoothness of the airflow; it enhances the product's visual recognition and differentiated competitiveness; it effectively prevents whistling and turbulence problems caused by unsealed local airflow channels, avoids airflow loss and noise degradation caused by high-speed airflow leakage, eliminates the impact of airflow inlet or outlet from other parts on the overall airflow stability and noise performance, and ensures smooth airflow and quiet operation; it can effectively prevent fine particles from entering the styling tool. Attached Figure Description

[0017] Figure 1 This is an exploded view of this utility model; Figure 2 This is a front view of the present invention; Figure 3 yes Figure 2 Sectional view at point AA.

[0018] In the diagram: 1. Air duct body, 2. Air duct body outlet, 3. Air duct body inlet, 4. Heating module, 5. Fan module, 11. Handle housing, 12. Air inlet tail cover, 13. Air outlet cover, 14. Air outlet hole, 21. Bracket, 22. Main control PCBA board slot, 23. Main control PCBA board, 24. Power cord, 25. Power cord holder, 26. Main control PCBA board clamp, 27. Power on / off switch slot, 28. Power on / off switch, 29. Sealing ring, 30. Sealing rib, 31. Air inlet mesh, 32. Filter screen, 33. Guide plate, 34. Guide hole. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1-3 In the embodiments described above, an air intake structure for a hair styling tool includes: The air duct body 1 has an air outlet 2 at its head and an air inlet 3 at its tail. The inner side of the air duct body 1 is provided with a heating module 4 and a fan module 5 along its central axis. The handle housing 11 has one end fitted onto the air duct body 1 and is sealed and fixedly connected thereto. The handle housing 11 is located on the side near the air inlet 3 of the air duct body. An air inlet tail cover 12 is installed and fixed at the other end of the handle housing 11. The air inlet tail cover 12 and the air inlet 3 of the air duct body are arranged opposite to each other.

[0021] An air outlet cover 13 is fitted on the air duct body 1. The air outlet cover 13 is installed and fixed on the side near the air outlet 2 of the air duct body by a snap-fit ​​structure. The end face of the air outlet cover 13 and the air outlet 2 of the air duct body are arranged opposite to each other and an air outlet hole 14 is provided on it. The central axis of the air outlet cover (13), the central axis of the handle shell (11) and the central axis of the air duct body (1) are all located on the same straight line. The outer diameter of the air outlet cover (13) and the outer diameter of the handle shell (11) are the same.

[0022] A guide plate 33 is installed and fixed at the air inlet 3 of the air duct body. Several guide holes 34 are evenly distributed on the guide plate 33. The port edge of the guide hole 34 adopts a transition rounded corner design.

[0023] A bracket 21 is fixed on the air duct body 1. The handle housing 11 is fixed to the outside of the bracket 21 by screws. The bracket 21 is located between the air inlet 3 and the air inlet tail cover 12 of the air duct body. The bracket 21 is provided with a main control PCBA board slot 22. The main control PCBA board 23 is installed in the main control PCBA board slot 22. The main control PCBA board 23 is connected to a power cord 24. A power cord holder 25 matching the power cord 24 is installed on the bracket 21 by screws. The main control PCBA board holder 26 is fixed on the power cord holder 25. The main control PCBA board holder 26 limits and fixes the main control PCBA board 23 at the main control PCBA board slot 22. The main control PCBA board holder 26 is provided with a power on / off switch slot 27. A power on / off switch 28 is installed in the power on / off switch slot 27. The power on / off switch 28 is located on the side near the air inlet tail cover 12. The power switch 28 is a conventional push-button switch, and an indicator light is designed at the power switch 28. Both the power switch 28 and its indicator light are located near the rear end of the handle housing 11. The handle housing 11 has no parts on its exterior that could come into contact with internal circuit boards or other live parts, achieving complete isolation from the internal high-voltage circuitry and control panels. This eliminates the risk of contact with live parts, minimizing the electrical safety risks of the molding machine. This design ensures electrical safety and provides sufficient isolation protection.

[0024] A circumferential limiting rib is fixed on the outer side wall of the bracket 21, and a circumferential limiting groove matching the circumferential limiting rib is provided on the inner side wall of the handle housing 11. The circumferential limiting rib and the circumferential limiting groove are interlocked to complete the circular positioning and prevent the handle housing 11 from rotating relative to the bracket 21.

[0025] The end face of the bracket 21 away from the air duct body 1 is provided with a bracket threaded hole. An axial limiting rib is fixed on the inner side wall of the handle housing 11. The axial limiting rib is provided with a rib threaded hole that matches the bracket threaded hole. After the handle housing 11 is installed on the air duct body 1, the rib threaded hole on the axial limiting rib is aligned with the bracket threaded hole on the bracket 21 and fixed by screws.

[0026] The inner wall of the handle housing 11 and the outer wall of the air duct body 1 are sealed together by a sealing ring 29. The sealing ring 29 is fitted on the air duct body 1 and fixed on the side near the air inlet 3 of the air duct body. Several sealing ribs 30 are provided on the outer wall of the sealing ring 29 to make close contact with the handle housing 11.

[0027] The outer edge of the air inlet cap 12 and the other end of the handle housing 11 are fixed by a swivel fastener. After installation, the outer end face of the air inlet cap 12 is flush with the tail end face of the handle housing 11. The air inlet cap 12 gradually curves inward toward one end of the handle housing 11 from its edge to its center. The air inlet cap 12 has several air inlet mesh holes 31, which are circumferentially distributed about the central axis of the air inlet cap 12. The air inlet mesh holes 31 are elongated mesh shapes, which facilitates molding.

[0028] A first buckle is fixed to the inner side of the other end of the handle housing 11, and a first groove matching the first buckle is provided at the outer edge of the air inlet cap 12. The air inlet cap 12 is rotated and fixed to the handle housing 11 through the cooperation of the first groove and the first buckle.

[0029] A filter screen 32 is provided on the air inlet tail cover 12. The filter screen 32 is sleeved on the air inlet tail cover 12. The mesh diameter of the filter screen 32 is ≤0.3mm, and the mesh diameter spacing of the filter screen 32 is 0.4mm~0.45mm. The filter screen 32 is installed and fixed on the bracket 21.

[0030] The filter screen 32 is integrated into a single part by embedding and wrapping a mesh frame and a steel mesh, and the plastic mesh frame is wrapped with adhesive. It is then fixed to the end of the bracket 21 by a swivel fastener structure.

[0031] A limiting guide post is provided at the end of the bracket 21 away from the air duct body 1. The air inlet tail cover 12 and the filter screen 32 are both sleeved on the limiting guide post. A second buckle is fixed on the outer wall of the limiting guide post. A second groove matching the second buckle is provided on the filter screen 32. The filter screen 32 is rotated and fixed with the limiting guide post at the end of the bracket 21 through the cooperation of the second groove and the second buckle.

[0032] The ratio between the air inlet area on the air inlet cap 12 and the air duct area at the fan module 5 is 2:1 to 1.25:1, and the ratio between the air inlet area on the filter screen 32 and the air duct area at the fan module 5 is 3:1 to 1.5:1.

[0033] Airflow path: The airflow path of the hair styling tool begins at the air inlet cap 12 at the tail of the handle housing 11: Under the negative pressure of the fan module 5, external air first enters through the circumferentially distributed elongated air inlet mesh 31 on the concave surface of the air inlet cap 12. After passing through the first layer of filtration (intercepting large particles), the airflow continues to flow to the inner filter screen 32, completing the second layer of fine filtration (blocking hair strands and fine particles) through the filter screen with a mesh diameter ≤0.3mm and a spacing of 0.4~0.45mm; the filtered clean... The airflow then reaches the air inlet 3 at the tail of the air duct body 1. Guided by the guide plate with the transition rounded corners of the guide hole at the air inlet 3, it flows smoothly into the interior of the air duct body 1. It passes through the fan module 5 (accelerated and pressurized) and the heating module 4 (heat exchanged with the heating element to achieve heating) in sequence. Finally, it forms a hot airflow that meets the styling requirements. It flows out from the air outlet 2 at the head of the air duct body 1 and is then blown out through the air outlet hole 14 on the end face of the air outlet cover 13, acting on the hair to achieve the styling effect. The gas inlet is designed with three layers of protection: First layer: The air inlet of the appliance is located on the tail end face of the handle housing 11. When the high-speed airflow is drawn in by the negative pressure of the fan module 5, the hand-held part and the air inlet are not in the same place, so there is no obstruction. In addition, because the air inlet is located on the inner side of the tail surface, the hair may be on the surface of the hand-held part, but will not reach the tail surface. The second layer: The air inlet tail cover 12 adopts a concave air inlet mesh 31 design. The air inlet mesh 31 is evenly distributed along the axial direction on the inner surface of the air inlet tail cover 12. The air inlet mesh 31 is relatively large, mainly filtering large particles to prevent large particles from entering. The third layer: The filter screen 32, which is fitted on the outside of the air inlet tail cover 12, prevents fine particles or hair and other filamentous objects from entering. The diameter of the filter screen 32 is ≤0.3mm, which can prevent fine particles from entering. The spacing between the filter screen holes is 0.4mm~0.45mm, which can ensure that the ratio of the air inlet area of ​​the filter screen 32 to the air duct area at the fan module 5 is ≥1.5:1.

Claims

1. An air intake structure for a hair styling tool, characterized in that, include: The air duct body (1) has an air outlet (2) at its head and an air inlet (3) at its tail. The air duct body (1) has a heating module (4) and a fan module (5) arranged sequentially along its central axis on its inner side. The handle housing (11) has one end fitted onto the air duct body (1) and is sealed and fixedly connected thereto. The handle housing (11) is located on the side near the air inlet (3) of the air duct body. An air inlet tail cover (12) is installed and fixed at the other end of the handle housing (11). The air inlet tail cover (12) and the air inlet (3) of the air duct body are arranged opposite to each other.

2. The air inlet structure of a hair styling tool according to claim 1, characterized in that, An air outlet cover (13) is fitted onto the air duct body (1). The air outlet cover (13) is installed and fixed on the side near the air outlet (2) of the air duct body. The end face of the air outlet cover (13) and the air outlet (2) of the air duct body are arranged opposite to each other and an air outlet hole (14) is provided on it. The central axis of the air outlet cover (13), the central axis of the handle housing (11) and the central axis of the air duct body (1) are all on the same straight line. The outer diameter of the air outlet cover (13) and the outer diameter of the handle housing (11) are the same.

3. The air inlet structure of a hair styling tool according to claim 1 or 2, characterized in that, A bracket (21) is fixed on the air duct body (1). The handle shell (11) is installed and fixed on the outside of the bracket (21). The bracket (21) is located between the air inlet (3) and the air inlet tail cover (12) of the air duct body. The bracket (21) is provided with a main control PCBA board slot (22). A main control PCBA board (23) is installed in the main control PCBA board slot (22). A power cord (24) is connected to the main control PCBA board (23). The bracket (21) is fixed with the power cord (24). A matching power cord holder (25) is provided, on which a main control PCBA board holder (26) is fixed. The main control PCBA board (23) at the main control PCBA board slot (22) is limited and fixed by the main control PCBA board holder (26). The main control PCBA board holder (26) is provided with a power switch slot (27). A power switch (28) is installed in the power switch slot (27). The power switch (28) is located on the side near the air inlet tail cover (12).

4. The air inlet structure of a hair styling tool according to claim 1 or 2, characterized in that, The inner wall of the handle housing (11) and the outer wall of the air duct body (1) are sealed together by a sealing ring (29). The sealing ring (29) is fitted on the air duct body (1) and fixed on the side near the air inlet (3) of the air duct body. The outer wall of the sealing ring (29) is provided with several sealing ribs (30) that are in close contact with the handle housing (11).

5. The air inlet structure of a hair styling tool according to claim 1 or 2, characterized in that, The outer edge of the air inlet cap (12) and the other end of the handle housing (11) are fastened together. The air inlet cap (12) gradually concaves inward toward one end of the handle housing (11) from its edge position to its center position. The air inlet cap (12) is provided with a number of air inlet mesh holes (31). The air inlet mesh holes (31) are circumferentially distributed about the central axis of the air inlet cap (12).

6. The air inlet structure of a hair styling tool according to claim 5, characterized in that, The inner side of the other port of the handle housing (11) is fixed with a first buckle, and the outer edge of the air inlet cap (12) is provided with a first groove that matches the first buckle. The air inlet cap (12) is rotated and fixed to the handle housing (11) by the cooperation of the first groove and the first buckle.

7. The air inlet structure of a hair styling tool according to claim 5, characterized in that, A filter screen (32) is provided on the air inlet tail cover (12). The filter screen (32) is sleeved on the air inlet tail cover (12). The mesh diameter of the filter screen (32) is ≤0.3mm, and the mesh diameter spacing of the filter screen (32) is 0.4mm ~0.45mm. The filter screen (32) is installed and fixed on the bracket (21).

8. The air inlet structure of a hair styling tool according to claim 7, characterized in that, The bracket (21) is provided with a limiting guide post at the end away from the air duct body (1). The air inlet cap (12) and the filter screen (32) are both sleeved on the limiting guide post. A second buckle is fixed on the outer wall of the limiting guide post. A second groove matching the second buckle is provided on the filter screen (32). The filter screen (32) is rotated and fixed to the limiting guide post at the end of the bracket (21) through the cooperation of the second groove and the second buckle.

9. The air inlet structure of a hair styling tool according to claim 7, characterized in that, The ratio between the air inlet area on the air inlet cap (12) and the air duct area at the fan module (5) is 2:1 to 1.25:1, and the ratio between the air inlet area on the filter screen (32) and the air duct area at the fan module (5) is 3:1 to 1.5:1.

Images