Unidirectional rotating wind direction switching mechanism and curling iron thereof

Abstract

The utility model discloses a unidirectional rotating wind direction switching mechanism and a curling iron thereof. The wind direction switching mechanism is arranged on the curling iron main body, and the curling iron main body comprises an inner barrel; an air outlet hole is formed in the side wall of the inner cylinder body; the wind direction switching mechanism comprises an outer sleeve, a reversing knob and a one-way switching structure, the outer sleeve is arranged outside the inner barrel in a sleeving mode, and the top of the outer sleeve is connected to the top of the inner barrel in a one-way rotating mode through the one-way switching structure; the outer sleeve comprises a left air duct and a right air duct, and the left air duct and the right air duct are matched with the air outlet holes through rotation. The outer side wall of the inner barrel is provided with a flow dividing baffle used for sealing the air flue. The ratchet wheel assembly is meshed with the top of the outer sleeve; the reversing knob is connected with the top of the outer sleeve through a linkage piece; when the reversing knob rotates in one direction, the linkage piece drives the outer sleeve to rotate, and the left air channel or / and the right air channel is / are closed by the flow dividing baffle. Due to the arrangement of the wind direction switching mechanism, a user can switch wind directions only through one-way rotation operation.

Description

Technical Field

[0001] This utility model belongs to the field of curling iron technology, specifically relating to a unidirectional rotating airflow switching mechanism and its curling iron. Background Technology

[0002] In the hair care industry, curling irons, as an important hair styling tool, have always been a focus of user attention due to their ease of use and efficiency. However, traditional curling irons present several inconveniences during use. Users often need to manually adjust the position or direction of the curling iron according to the direction of curling (left or right), which not only increases the complexity of operation and reduces curling efficiency but may also affect the overall effect of the curl. Especially when frequently changing the curling direction is required, users usually need to switch hands or change curling irons with different rotation directions, further reducing the convenience of use.

[0003] For example, Chinese patent CN202311799U discloses a curling iron with a ventilation function, including a grip, a rotation drive device, and a ventilation device for venting air towards the curling barrel. A rotation button for controlling the rotation direction of the curling barrel assembly is provided on the upper outer shell of the grip. Although the airflow direction can be switched by rotating the rotation button in different directions to achieve two different airflow effects, users need to distinguish whether the curling iron is rotated left or right during use.

[0004] There are also existing technologies, such as the automatic hair curler disclosed in Chinese Patent No. CN208676491U, which uses left and right rotary buttons on the handle surface to change the rotation direction. Although this design provides a more intuitive way of operation, users still need to distinguish between left and right rotation, and the two-button setup increases the risk of accidental activation.

[0005] In the aforementioned existing curling irons, users need to first determine the current rotation direction when switching airflow, and then switch to the desired direction by rotating or pressing a button. Because airflow direction changes frequently during curling, this operation is particularly cumbersome and prone to errors. More importantly, users need to wait for the rotation to complete and hold, or for the button switch to complete, before they can determine the current airflow direction, which undoubtedly increases the complexity and time cost of operation. Especially when users forget the current rotation direction, they need to perform the direction test again, further reducing the user experience. Summary of the Invention

[0006] To address the problems in related technologies, this utility model proposes a unidirectional rotating airflow switching mechanism and its curling iron to overcome the aforementioned technical problems in existing related technologies. By setting the airflow switching mechanism, this utility model allows users to switch airflow directions simply by performing a unidirectional rotation operation when they need to switch airflow directions, without needing to distinguish between left-hand and right-hand rotation, greatly improving the efficiency and convenience of curling hair.

[0007] The technical solution of this utility model is implemented as follows: a unidirectional rotating air direction switching mechanism is provided on the body of the curling iron, the body of the curling iron includes an inner cylinder; the interior of the inner cylinder is hollow, with an air inlet at the bottom and an air outlet on its side wall.

[0008] The airflow switching mechanism includes an outer sleeve, a reversing knob, and a one-way switching structure. The outer sleeve is fitted over the outside of the inner cylinder, and the top of the outer sleeve is rotatably connected to the top of the inner cylinder through the one-way switching structure. The outer sleeve includes a left air duct and a right air duct, which are adapted to the air outlet by rotation.

[0009] The outer wall of the inner cylinder is provided with a flow divider baffle for sealing the air duct; one side of the flow divider baffle covers the outer wall of the inner cylinder, and the other side is slidably connected to the inner wall of the outer sleeve.

[0010] The one-way switching structure includes a ratchet assembly that engages with the top of the outer sleeve; the reversing knob is connected to the top of the outer sleeve via a linkage.

[0011] It should be noted that in this utility model, the meshing structure between the ratchet assembly and the outer sleeve is not limited to an internal meshing ratchet structure or an external meshing ratchet structure. Both internal and external meshing structures have the same technical effect.

[0012] When the reversing knob is rotated in one direction, the linkage drives the outer sleeve to rotate, and the left air duct and / or the right air duct is closed by the diversion baffle.

[0013] Furthermore, the reversing knob can be rotated clockwise or counterclockwise;

[0014] In this invention, the reversing knob rotates counterclockwise.

[0015] Furthermore, the ratchet assembly includes a limiting cover, an active pawl, and a check pawl. One end of the active pawl is provided with teeth, and the active pawl is engaged with the check pawl through the teeth. The other end of the active pawl is provided with a rotating groove, and the rotating groove is rotatably connected to the limiting cover through a rotating shaft. The top of the inner cylinder is provided with a positioning post extending toward the reversing knob, and the positioning post extends to connect with the limiting cover.

[0016] In this invention, at least two active pawls are provided;

[0017] The bottom of the inner cylinder is connected to a fixed base, and a base shell is fitted over the fixed base. The base shell is connected to the bottom of the outer cylinder, and the inner wall of the base shell is engaged with the fixed base.

[0018] When the outer sleeve rotates, the inner cylinder, the fixed base, the base shell, and the limiting cover remain relatively stationary;

[0019] Furthermore, the fixed base is used to connect with the air outlet of the hair dryer main unit;

[0020] Furthermore, the fixed base is provided with a locking part, which extends toward the hair dryer main unit and connects to the locking groove on the hair dryer main unit;

[0021] In this invention, the engaging part is an elastic engaging buckle, which engages into the engaging groove after being pressed to achieve quick locking.

[0022] When the reversing knob is rotated in one direction to the first locking position, the linkage drives the outer sleeve to rotate, the left air duct is closed by the diversion baffle and the right air duct is opened; when the reversing knob continues to rotate in one direction to the second locking position, both the left and right air ducts are closed by the diversion baffle; when the reversing knob continues to rotate in one direction to the third locking position, the right air duct is closed by the diversion baffle and the left air duct is opened.

[0023] Furthermore, the top of the outer sleeve is provided with a ratchet groove, and the ratchet assembly is disposed in the ratchet groove; the side wall of the ratchet groove is evenly provided with a plurality of anti-return pawls, and each anti-return pawl has a tooth groove on both sides that is adapted to the meshing teeth.

[0024] Adjacent check pawls are separated by tooth ridges, and the tooth ridges and check pawls are arranged alternately.

[0025] One side of the tooth is provided with a guide slope. When the outer sleeve rotates, it drives the anti-return pawl or tooth ridge to slide along the guide slope until the tooth slides into the next tooth groove.

[0026] Furthermore, the outer surface of the top of the outer sleeve is recessed to form the ratchet groove; the positioning post extends through the middle of the ratchet groove and connects with the limiting cover; the bottom of the limiting cover is provided with a limiting post, and the rotating shaft and the limiting post both extend from the bottom of the limiting cover toward the bottom surface of the ratchet groove;

[0027] The active pawl is an arc-shaped flexible structure, and its inner sidewall abuts against the limiting post. During the rotation of the outer cylinder, the tooth ridge slides along the guide slope, causing the active pawl to be pressed and rotate toward the center of the ratchet groove.

[0028] Furthermore, the inner surface of the top of the outer sleeve is provided with an annular wall extending toward the inner cylinder, and the annular wall and the outer surface of the top of the inner cylinder form the ratchet groove; the rotating shaft extends from the outer surface of the top of the inner cylinder to the bottom of the limiting cover.

[0029] Furthermore, the outer surface of the top of the inner cylinder is provided with a first limiting block and a second limiting block, and a limiting groove is formed between the first limiting block and the second limiting block; a third limiting block is protruding from the bottom of the limiting cover, and the third limiting block is engaged with the limiting groove.

[0030] The ratchet assembly further includes an elastic plate, one end of which abuts against the first limiting block and the other end against the tooth; or, the other end of the elastic plate abuts against the inner sidewall of the active pawl.

[0031] During the rotation of the outer cylinder, the tooth ridge slides along the guide inclined surface, causing the active pawl to be pressed and rotate toward the center of the ratchet groove. The elastic plate is pressed and generates a reaction force. The active pawl is reset under the drive of the reaction force. The elastic plate is used to ensure the active pawl is reset.

[0032] It should be noted that the length of the active pawl is not limited in this utility model, and the user can set it according to the design requirements; specifically, the length of the active pawl can be as short as the teeth abut against the elastic plate, or it can be extended to the point where the inner sidewall of the active pawl abuts against the elastic plate.

[0033] Furthermore, the adjacent tooth ridges and the anti-return pawl form a rotating group; in each rotating group, a first tooth groove and a second tooth groove are respectively provided on both sides of the tooth ridge.

[0034] When the tooth is in the first tooth groove, the reversing knob is in the first locking position; when the tooth slides from the first tooth groove to the second tooth groove, the reversing knob rotates to the second locking position; when the tooth slides from the second tooth groove to the first tooth groove of the next rotation group, the reversing knob rotates to the third locking position; each time the tooth switches to the first tooth groove of the next rotation group, the diversion baffle will close the reverse air passage.

[0035] Furthermore, the ratchet groove is provided with at least six rotating groups.

[0036] Furthermore, the linkage component is a connecting rod, one end of which is fixedly connected to the reversing knob and the other end is fixedly connected to the top of the outer sleeve. The connecting rod is driven to rotate by the unidirectional rotation of the reversing knob, thereby driving the outer sleeve to rotate in one direction.

[0037] Furthermore, the connecting rod extends from the bottom of the reversing knob toward the inner cylinder to form a first locking part, which engages with the inner surface of the top of the outer sleeve; or,

[0038] The connecting rod extends from the bottom of the reversing knob toward the outer sleeve to form a second locking part; the outer surface of the top of the outer sleeve is provided with a slot that matches the second locking part, and the second locking part engages with the slot.

[0039] Furthermore, the outer sleeve is provided with multiple convex ribs at equal intervals in a ring, and an air guide plate is installed between two adjacent convex ribs; one side of the convex rib forms the left air duct between the front air guide plate, and the other side of the convex rib forms the right air duct between the rear air guide plate;

[0040] Furthermore, on the outer sleeve, each of the protruding ribs has a left ventilation hole on one side and a right ventilation hole on the other side; multiple left ventilation holes are arranged in the same row to form the left air duct, and multiple right ventilation holes are arranged in the same row to form the right air duct; each ventilation hole and air outlet is elongated.

[0041] Furthermore, the air guide plate is detachably connected to the outer sleeve, the air guide plate is provided with multiple buckles, the outer sleeve is provided with buckle grooves that engage with the buckles, and the air guide plate is snapped between the two protruding ridges.

[0042] A curling iron includes: a hair dryer main unit for generating airflow, and an airflow switching mechanism and a curling iron body as described above; the curling iron body is connected to the air outlet of the hair dryer main unit, and the airflow switching mechanism is disposed on the curling iron body and is used to switch the direction of the airflow blown out of the air outlet.

[0043] Furthermore, the hair dryer main unit is equipped with a fan and a heating element. The fan is used to generate airflow, and the heating element is used to heat the airflow into hot airflow. The hot airflow enters the curling iron body from the air outlet of the hair dryer main unit.

[0044] The beneficial effects of this utility model are:

[0045] (1) The air direction switching mechanism in this utility model can switch between the left and right air channels by rotating the reversing knob in one direction, which greatly reduces the difficulty of operation, improves the convenience of use, and makes it easier for users to control the air direction of the curling iron.

[0046] (2) The wind direction switching mechanism in this utility model adopts a unidirectional rotation design, which reduces the structural wear caused by frequent bidirectional rotation. At the same time, the meshing connection of the ratchet assembly ensures the connection stability between the outer sleeve and the inner sleeve, improves the reliability of the entire switching mechanism, and extends the service life of the curling iron.

[0047] (3) By setting a diversion baffle, when the outer tube rotates, the diversion baffle can slide closely against the inner wall of the outer tube, effectively closing or opening the left and right air ducts, ensuring the accuracy and sealing of the air duct switching, so that the air can flow in the expected direction and path, and improving the use effect of the curling iron. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the inner and outer structures of the curling iron body in Example 1;

[0049] Figure 2 This is a schematic diagram of the structure in Example 1, showing the separation of the inner cylinder, fixed base, and diversion baffle.

[0050] Figure 3 This is a schematic diagram showing the separation of components such as the outer sleeve, base shell, and reversing knob in Example 1.

[0051] Figure 4 This is a schematic diagram of the main body of the curling iron in Example 1;

[0052] Figure 5 This is a cross-sectional view of the main body of the curling iron in Example 1;

[0053] Figure 6 This is a schematic diagram of the structure of the outer sleeve, ratchet assembly, and air guide plate combination in Example 1;

[0054] Figure 7 This is a cross-sectional view of the combination of the outer jacket, diversion baffle, and air guide plate in Example 1;

[0055] Figure 8 This is a top view of the outer sleeve, ratchet assembly, and air guide plate combination in Example 1;

[0056] Figure 9 This is a top view of the combination of the outer sleeve, active pawl, and air guide plate in Example 1;

[0057] Figure 10 This is a schematic diagram of the structure in Example 1 where the active pawl and ratchet groove are separated;

[0058] Figure 11 This is a schematic diagram of the limiting cover in Example 1;

[0059] Figure 12 This is a cross-sectional view of the main body of the curling iron in Example 2;

[0060] Figure 13 This is a schematic diagram of the separation of the reversing knob and the outer sleeve in Example 2;

[0061] Figure 14This is a cross-sectional view of the outer sleeve in Example 2;

[0062] Figure 15 for Figure 14 Enlarged view of point A;

[0063] Figure 16 This is a schematic diagram of the structure of the inner cylinder and ratchet assembly in Example 2;

[0064] Figure 17 This is a schematic diagram of the structure in Example 3 where the limiting cover is separated from the ratchet assembly;

[0065] Figure 18 This is a cross-sectional view of the inner cylinder and ratchet assembly combination in Example 3.

[0066] Marker explanation:

[0067] 1. Inner cylinder; 11. Air outlet; 12. Positioning post; 13. Diverter baffle; 2. Outer sleeve; 21. Annular wall; 22. Clip groove; 23. Clip groove; 24. Raised ridge; 25. Air guide plate; 251. Clip; 26. Left ventilation hole; 27. Right ventilation hole;

[0068] 3. Reversing knob; 31. First locking part; 32. Second locking part; 4. Limiting cover; 41. Limiting post; 42. Third limiting block; 5. Active pawl; 51. Tooth; 511. Guide slope; 52. Rotating groove; 6. Ratchet groove; 61. First limiting block; 62. Second limiting block; 63. Limiting groove; 64. Elastic plate;

[0069] 7. Rotary assembly; 71. Anti-return pawl; 72. Tooth ridge; 721. First tooth groove; 722. Second tooth groove; 8. Rotating shaft; 9. Fixed base; 91. Elastic snap-fit; 10. Base shell. Detailed Implementation

[0070] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0071] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0072] Example 1

[0073] like Figure 1-11 As shown, this embodiment provides a unidirectional rotating airflow switching mechanism, which is disposed on the body of the curling iron. The body of the curling iron includes an inner cylinder 1. The interior of the inner cylinder 1 is hollow, with an air inlet at the bottom and an air outlet 11 on its side wall.

[0074] The airflow switching mechanism includes an outer sleeve 2, a reversing knob 3, and a one-way switching structure. The outer sleeve 2 is fitted onto the outside of the inner cylinder 1, and the top of the outer sleeve 2 is rotatably connected to the top of the inner cylinder 1 through the one-way switching structure. The outer sleeve 2 includes a left air duct and a right air duct, and the left and right air ducts are respectively adapted to the air outlet 11 by rotation.

[0075] The outer wall of the inner cylinder 1 is provided with a flow divider baffle 13 for sealing the air duct; one side of the flow divider baffle 13 covers the outer wall of the inner cylinder 1, and the other side is slidably connected to the inner wall of the outer sleeve 2.

[0076] The one-way switching structure includes a ratchet assembly, which is engaged with the top of the outer sleeve 2; the reversing knob 3 is connected to the top of the outer sleeve 2 via a linkage.

[0077] When the reversing knob 3 is rotated in one direction, the linkage drives the outer sleeve 2 to rotate, and the left air duct and / or the right air duct is closed by the diversion baffle 13.

[0078] First, compared to traditional curling irons that require left and right buttons to switch airflow direction, the airflow switching mechanism in this embodiment can switch between left and right airflow channels by rotating the reversing knob 3 in one direction, which greatly reduces the difficulty of operation, improves the convenience of use, and allows users to control the airflow direction of the curling iron more easily.

[0079] Secondly, the switching mechanism of existing bidirectional curling irons relies on bidirectional rotation, making it difficult to accurately switch the airflow direction. This embodiment utilizes a unidirectional rotation method, combined with the design of a ratchet assembly and linkage, to accurately control the rotation angle of the outer sleeve 2, thereby achieving precise switching between the left and / or right airflow channels.

[0080] Secondly, multi-directional rotation can easily lead to structural wear and reduce service life. The wind direction switching mechanism in this embodiment adopts a unidirectional rotation design, which reduces structural wear caused by frequent bidirectional rotation. At the same time, the meshing connection of the ratchet assembly ensures the connection stability between the outer sleeve 2 and the inner sleeve 1, improves the reliability of the entire switching mechanism, and extends the service life of the curling iron.

[0081] Finally, by setting the diversion baffle 13, when the outer sleeve 2 rotates, the diversion baffle 13 can slide closely against the inner wall of the outer sleeve 2, effectively closing or opening the left and right air ducts, ensuring the accuracy and sealing of the air duct switching, so that the air can flow in the expected direction and path, and improving the use effect of the curling iron.

[0082] It should be noted that, in this embodiment, the meshing structure between the ratchet assembly and the outer sleeve 2 is not limited to an internal meshing ratchet structure or an external meshing ratchet structure; both internal and external meshing structures have the same technical effect.

[0083] Specifically, the ratchet assembly includes a limiting cover 4, an active pawl 5, and a check pawl 71. One end of the active pawl 5 is provided with a tooth 51, which engages with the check pawl 71. The other end of the active pawl 5 is provided with a rotating groove 52, which is rotatably connected to the limiting cover 4 via a rotating shaft 8. The top of the inner cylinder 1 is provided with a positioning post 12 extending toward the reversing knob 3, which extends to connect with the limiting cover 4.

[0084] In this embodiment, at least two active pawls 5 are provided;

[0085] The setting of the limiting cover 4, active pawl 5, anti-return pawl 71 and positioning post 12 not only ensures stable transmission of the unidirectional switching structure, but also enables precise positioning, thereby improving the reliability and stability of the wind direction switching mechanism.

[0086] Specifically, the reversing knob 3 rotates clockwise or counterclockwise;

[0087] In this embodiment, the reversing knob 3 rotates counterclockwise;

[0088] Specifically, when the reversing knob 3 is rotated in one direction to the first locking position, the linkage drives the outer sleeve 2 to rotate, the left air duct is closed by the diversion baffle 13 and the right air duct is opened; when the reversing knob 3 continues to rotate in one direction to the second locking position, both the left and right air ducts are closed by the diversion baffle 13; when the reversing knob 3 continues to rotate in one direction to the third locking position, the right air duct is closed by the diversion baffle 13 and the left air duct is opened.

[0089] Specifically, the top of the outer sleeve 2 is provided with a ratchet groove 6, and the ratchet assembly is located in the ratchet groove 6, making the structure inside the reversing knob 3 more compact; the side wall of the ratchet groove 6 is evenly provided with a plurality of anti-return pawls 71, and each anti-return pawl 71 has tooth grooves on both sides that are adapted to the teeth 51.

[0090] The two adjacent anti-return pawls 71 are separated by tooth ridges 72. The tooth ridges 72 and anti-return pawls 71 are arranged alternately. This layout makes the meshing points evenly distributed and enhances the smoothness of the unidirectional switching structure transmission.

[0091] One side of the tooth 51 is provided with a guide slope 511. When the outer sleeve 2 rotates, it drives the anti-return pawl 71 or tooth ridge 72 to slide along the guide slope 511 until the tooth 51 slides into the next tooth groove, thereby achieving precise and smooth gear shifting.

[0092] Specifically, the outer surface of the top of the outer sleeve 2 is recessed to form the ratchet groove 6, which provides a compact and orderly installation space for each component of the ratchet assembly, which is beneficial to the overall structural layout;

[0093] The positioning post 12 extends through the middle of the ratchet groove 6 and connects to the limiting cover 4; the bottom of the limiting cover 4 is provided with a limiting post 41, and the rotating shaft 8 and the limiting post 41 both extend from the bottom of the limiting cover 4 toward the bottom surface of the ratchet groove 6.

[0094] The active pawl 5 is an arc-shaped flexible structure, and its inner sidewall abuts against the limiting post 41. During the rotation of the outer cylinder, the tooth ridge 72 slides along the guide inclined surface 511, causing the active pawl 5 to be pressed and rotate towards the center of the ratchet groove 6. The limiting post 41 is used to limit the rotation angle of the active pawl 5 to prevent the active pawl 5 from rotating excessively, thereby ensuring that the active pawl 5 can achieve reset by its own flexible characteristics.

[0095] Specifically, the adjacent tooth ridges 72 and the anti-return pawl 71 form a rotating group 7; in each rotating group 7, the tooth ridges 72 are provided with a first tooth groove 721 and a second tooth groove 722 on both sides respectively.

[0096] When the tooth 51 is in the first tooth groove 721, the reversing knob 3 is in the first locking position; when the tooth 51 slides from the first tooth groove 721 to the second tooth groove 722, the reversing knob 3 rotates to the second locking position; when the tooth 51 slides from the second tooth groove 722 to the first tooth groove 721 of the next rotating group 7, the reversing knob 3 rotates to the third locking position; each time the tooth 51 switches to the first tooth groove 721 of the next rotating group 7, the diversion baffle 13 will close the reverse air duct;

[0097] In this embodiment, the sliding of the meshing tooth 51 between different grooves enables precise switching of the reversing knob 3, that is, a clear distinction between the first position, the second position and the third position, making the wind direction switching operation more precise and clear.

[0098] More specifically, the ratchet groove 6 is provided with at least six rotating groups 7, which provides more switching gears and enriches the options for wind direction adjustment.

[0099] Specifically, the linkage is a connecting rod. One end of the connecting rod is fixedly connected to the reversing knob 3, and the other end is fixedly connected to the top of the outer sleeve 2. The connecting rod is rotated by the unidirectional rotation of the reversing knob 3, which in turn drives the outer sleeve 2 to rotate in one direction.

[0100] More specifically, the connecting rod extends from the bottom of the reversing knob 3 toward the inner cylinder 1 to form a first locking part 31, which engages with the inner surface of the top of the outer sleeve 2.

[0101] Specifically, the outer sleeve 2 is provided with multiple protruding ribs 24 at equal intervals in a ring, and an air guide plate 25 is installed between two adjacent protruding ribs 24; one side of the protruding rib 24 forms the left air duct between the front air guide plate 25, and the other side of the protruding rib 24 forms the right air duct between the rear air guide plate 25.

[0102] More specifically, on the outer sleeve 2, each of the protruding ribs 24 has a left ventilation hole 26 on one side and a right ventilation hole 27 on the other side; multiple left ventilation holes 26 are arranged in the same row to form the left air duct, and multiple right ventilation holes 27 are arranged in the same row to form the right air duct; each ventilation hole and air outlet 11 is elongated.

[0103] More specifically, the air guide plate 25 is detachably connected to the outer sleeve 2. The air guide plate 25 is provided with a plurality of buckles 251, and the outer sleeve 2 is provided with buckle grooves 22 that engage with the buckles 251. The air guide plate 25 is snapped between the two protruding ridges 24.

[0104] In this embodiment, the cooperation between the protruding rib 24 and the air guide plate 25 forms left and right air ducts respectively, resulting in a clear and reasonable structure that facilitates precise design and layout of the air ducts. Moreover, left and right ventilation holes are respectively provided on both sides of the protruding rib 24, and they are arranged in the same row to form a complete air duct. The design of the elongated ventilation holes and air outlet 11 can effectively ensure smooth airflow and improve ventilation efficiency.

[0105] In addition, the air guide plate 25 and the outer sleeve 2 are detachably connected by the snap-fit ​​method of the buckle 251 and the snap-fit ​​groove 22, which not only makes installation convenient, but also facilitates the subsequent disassembly, cleaning or replacement of the air guide plate 25, reducing maintenance costs and extending the service life of the air direction switching mechanism.

[0106] A curling iron includes: a hair dryer main unit for generating airflow, and an airflow switching mechanism and a curling iron body as described above; the curling iron body is connected to the air outlet of the hair dryer main unit, and the airflow switching mechanism is disposed on the curling iron body and is used to switch the direction of the airflow blown out by the air outlet 11.

[0107] More specifically, the hair dryer main unit is equipped with a fan and a heating element. The fan is used to generate airflow, and the heating element is used to heat the airflow into hot airflow. The hot airflow enters the curling iron body from the air outlet of the hair dryer main unit.

[0108] Specifically, the bottom of the inner cylinder 1 is connected to a fixed base 9, and a base shell 10 is sleeved on the outside of the fixed base 9. The base shell 10 is connected to the bottom of the outer cylinder 2, and the inner wall of the base shell 10 is engaged with the fixed base 9.

[0109] When the outer sleeve 2 rotates, the inner cylinder 1, the fixed base 9, the base shell 10 and the limiting cover 4 remain relatively stationary;

[0110] Specifically, the fixed base 9 is used to connect with the air outlet of the hair dryer main unit;

[0111] More specifically, the fixed base 9 is provided with a locking part, which extends toward the hair dryer main unit and connects to the locking groove on the hair dryer main unit;

[0112] In this embodiment, the engaging part is an elastic engaging buckle 91, which engages into the engaging groove after being pressed to achieve quick locking.

[0113] Example 2

[0114] like Figure 12-16 As shown, this embodiment also provides a unidirectional rotating wind direction switching mechanism. Features not explained in this embodiment can be explained using the methods in Embodiment 1, and will not be repeated here. The difference between this embodiment and Embodiment 1 is:

[0115] The inner surface of the top of the outer sleeve 2 is provided with an annular wall 21 extending toward the inner cylinder 1. The annular wall 21 and the outer surface of the top of the inner cylinder 1 enclose each other to form the ratchet groove 6. The rotating shaft 8 extends from the outer surface of the top of the inner cylinder 1 to the bottom of the limiting cover 4.

[0116] Specifically, the outer surface of the top of the inner cylinder 1 is provided with a first limiting block 61 and a second limiting block 62, and a limiting groove 63 is formed between the first limiting block 61 and the second limiting block 62; the bottom of the limiting cover 4 is provided with a third limiting block 42, and the third limiting block 42 is engaged with the limiting groove 63.

[0117] The ratchet assembly further includes an elastic plate 64, one end of which abuts against the first limiting block 61 and the other end of which abuts against the tooth 51; or, the other end of the elastic plate 64 abuts against the inner sidewall of the active pawl 5.

[0118] During the rotation of the outer cylinder, the tooth ridge 72 slides along the guide inclined surface 511, causing the active pawl 5 to be pressed and rotate towards the center of the ratchet groove 6. The elastic plate 64 is pressed and generates a reaction force. The active pawl 5 is reset under the drive of the reaction force. The elastic plate 64 is used to ensure that the active pawl 5 is reset.

[0119] It should be noted that in this embodiment, the length of the active pawl 5 is not limited, and the user can set it according to design requirements; for example... Figure 16-17 As shown, the length of the active pawl 5 can be as short as the tooth 51 abuts against the elastic plate 64, or it can be extended to the point where the inner sidewall of the active pawl 5 abuts against the elastic plate 64.

[0120] Specifically, the connecting rod extends from the bottom of the reversing knob 3 toward the outer sleeve 2 to form a second locking part 32; the outer surface of the top of the outer sleeve 2 is provided with a slot 23 that matches the second locking part 32, and the second locking part 32 engages with the slot 23 to ensure that the connecting rod drives the outer sleeve 2 to achieve unidirectional rotation.

[0121] Example 3

[0122] like Figure 17-18 As shown, this embodiment also provides a unidirectional rotating wind direction switching mechanism. Features not explained in this embodiment can be explained using the methods in Embodiments 1 and 2, and will not be repeated here. The difference between this embodiment and Embodiments 1 and 2 is:

[0123] The bottom of the limiting cover 4 is simultaneously provided with the third limiting block 42 and the limiting post 41, and the inner sidewall of the active pawl 5 abuts against the limiting post 41; the limiting post 41 is used to limit the rotation angle of the active pawl 5 to prevent the active pawl 5 from rotating excessively, thereby ensuring that the active pawl 5 can achieve reset by its own flexible characteristics.

[0124] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A unidirectional rotating airflow switching mechanism, disposed on the body of a curling iron, characterized in that: The curling iron body includes an inner tube; the interior of the inner tube is hollow, with an air inlet at the bottom and an air outlet on its side wall. The airflow switching mechanism includes an outer sleeve, a reversing knob, and a one-way switching structure. The outer sleeve is fitted over the outside of the inner cylinder, and the top of the outer sleeve is rotatably connected to the top of the inner cylinder through the one-way switching structure. The outer sleeve includes a left air duct and a right air duct, which are adapted to the air outlet by rotation. The outer wall of the inner cylinder is provided with a flow divider baffle for sealing the air duct; one side of the flow divider baffle covers the outer wall of the inner cylinder, and the other side is slidably connected to the inner wall of the outer sleeve. The one-way switching structure includes a ratchet assembly that engages with the top of the outer sleeve; the reversing knob is connected to the top of the outer sleeve via a linkage. When the reversing knob is rotated in one direction, the linkage drives the outer sleeve to rotate, and the left air duct and / or the right air duct is closed by the diversion baffle.

2. The unidirectional rotating wind direction switching mechanism according to claim 1, characterized in that, The ratchet assembly includes a limiting cover, an active pawl, and a check pawl. One end of the active pawl is provided with teeth, and the active pawl is engaged with the check pawl through the teeth. The other end of the active pawl is provided with a rotating groove, and the rotating groove is rotatably connected to the limiting cover through a rotating shaft. The top of the inner cylinder is provided with a positioning post extending toward the reversing knob, and the positioning post extends to connect with the limiting cover. When the reversing knob is rotated in one direction to the first locking position, the linkage drives the outer sleeve to rotate, the left air duct is closed by the diversion baffle and the right air duct is opened; when the reversing knob continues to rotate in one direction to the second locking position, both the left and right air ducts are closed by the diversion baffle; when the reversing knob continues to rotate in one direction to the third locking position, the right air duct is closed by the diversion baffle and the left air duct is opened.

3. The unidirectional rotating wind direction switching mechanism according to claim 2, characterized in that, The top of the outer sleeve is provided with a ratchet groove, and the ratchet assembly is disposed in the ratchet groove; the side wall of the ratchet groove is evenly provided with a plurality of anti-return pawls, and each anti-return pawl has a tooth groove on both sides that matches the meshing teeth. Adjacent check pawls are separated by tooth ridges, and the tooth ridges and check pawls are arranged alternately. One side of the tooth is provided with a guide slope. When the outer sleeve rotates, it drives the anti-return pawl or tooth ridge to slide along the guide slope until the tooth slides into the next tooth groove.

4. The unidirectional rotating wind direction switching mechanism according to claim 3, characterized in that, The outer surface of the top of the outer sleeve is recessed to form the ratchet groove; the bottom of the limiting cover is provided with a limiting post, and the rotating shaft and the limiting post both extend from the bottom of the limiting cover toward the bottom surface of the ratchet groove; the active pawl is an arc-shaped flexible structure, and its inner sidewall abuts against the limiting post.

5. The unidirectional rotating wind direction switching mechanism according to claim 3, characterized in that, The inner surface of the top of the outer sleeve is provided with a ring wall extending toward the inner cylinder, and the ring wall and the outer surface of the top of the inner cylinder form the ratchet groove.

6. The unidirectional rotating wind direction switching mechanism according to claim 3, characterized in that, The outer surface of the top of the inner cylinder is provided with a first limiting block and a second limiting block, and a limiting groove is formed between the first limiting block and the second limiting block; a third limiting block is protruding from the bottom of the limiting cover, and the third limiting block is engaged with the limiting groove. The ratchet assembly further includes an elastic plate, one end of which abuts against the first limiting block and the other end against the tooth; or, the other end of the elastic plate abuts against the inner sidewall of the active pawl.

7. The unidirectional rotating wind direction switching mechanism according to claim 3, characterized in that, The adjacent tooth ridges and the anti-return pawl form a rotating group; in each rotating group, the tooth ridges are provided with a first tooth groove and a second tooth groove on both sides respectively. When the tooth is in the first tooth groove, the reversing knob is in the first locking position; when the tooth slides from the first tooth groove to the second tooth groove, the reversing knob rotates to the second locking position; when the tooth slides from the second tooth groove to the first tooth groove of the next rotation group, the reversing knob rotates to the third locking position; each time the tooth switches to the first tooth groove of the next rotation group, the diversion baffle will close the reverse air passage.

8. The unidirectional rotating wind direction switching mechanism according to claim 1, characterized in that, The linkage component is a connecting rod. One end of the connecting rod is fixedly connected to the reversing knob, and the other end is fixedly connected to the top of the outer sleeve. The connecting rod is driven to rotate by the unidirectional rotation of the reversing knob, which in turn drives the outer sleeve to rotate in one direction.

9. The unidirectional rotating wind direction switching mechanism according to claim 1, characterized in that, The outer sleeve is provided with multiple convex ribs at equal intervals in a ring, and an air guide plate is installed between two adjacent convex ribs; one side of the convex rib forms the left air duct between the front air guide plate and the other side of the convex rib forms the right air duct between the rear air guide plate and the front air guide plate.

10. A curling iron, characterized in that, include: A hair dryer main unit for generating airflow, and a wind direction switching mechanism and a curling iron body as described in any one of claims 1-9; the curling iron body is connected to the air outlet of the hair dryer main unit, and the wind direction switching mechanism is disposed on the curling iron body and is used to switch the direction of the airflow blown out of the air outlet.

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