Hot air comb convenient to carry and store

Abstract

The utility model discloses a hot air comb convenient to carry and store, and belongs to the technical field of personal care appliances. Comprising a handle and an air outlet cylinder, and a self-rotating structure is arranged between the handle and the air outlet cylinder to enable the air outlet cylinder to rotate relative to the handle and be overlapped; the other end of the air outlet cylinder is connected with the anti-scalding comb head through a buckle assembly. The self-rotating structure comprises a rotating part, a sliding piece and the like, locking is achieved through clamping of a locking protruding column and an auxiliary clamping hole, and the jacking assembly is used for unlocking. The anti-scald comb head comprises a three-dimensional annular brush comb head and a single-face brush comb head, the three-dimensional annular brush comb head is convenient to operate and far away from a heat source due to the rotary handle design, and the single-face brush comb head divides a cavity to guide airflow. The wedge-shaped clamping block of the buckle assembly is matched with the L-shaped locking groove to achieve rapid disassembly and assembly of the comb head. The handle is connected with a power line through a quick-plug structure, and 360-degree circumferential rotation sliding electrification is supported. The problems that a traditional hot air comb is inconvenient to fold, the comb head is inconvenient to replace, and the anti-scalding effect is insufficient are solved, and the multifunctional hot air comb has the advantages of being convenient to store, convenient to replace the comb head and safe in anti-scalding effect due to the separated power line design.

Description

Technical Field

[0001] This utility model relates to the field of personal care products technology, specifically to a portable and easy-to-store hot air comb. Background Technology

[0002] Traditional hot air combs face significant technical bottlenecks in structural design and functional implementation. Firstly, the insufficient reliability of the folding mechanism severely restricts product performance. Existing products mostly use single-point snap-fit ​​or elastic pin locking solutions, which, while initially achieving folding functionality, are prone to gaps due to mechanical wear during long-term, high-frequency use, leading to loosening of the folding joints and directly affecting the coaxial accuracy of the air outlet and handle components. Secondly, modular comb systems have inherent defects. While mainstream threaded connections or pin-positioning solutions simplify the assembly and disassembly process, there is a risk of misalignment between the comb teeth and the air outlet, resulting in uneven airflow distribution and reduced styling efficiency. Furthermore, rapid disassembly can easily cause components to detach, posing a safety hazard. Regarding safety protection and durability, existing technologies have systemic defects. Traditional anti-scalding solutions only use localized heat insulation layers for passive heat dissipation, failing to construct a complete thermal barrier system. Experimental data shows that even after continuous operation, the surface temperature of the outer shell can still reach 62-65℃, posing a risk of low-temperature burns. The fixed design of the power cord interface exacerbates equipment wear and tear. The non-rotatable plug structure concentrates bending stress at the cable root, resulting in a high rate of insulation damage after repeated plugging and unplugging, severely limiting product lifespan in various usage scenarios. Therefore, there is an urgent need for a hot air comb that is compact, reliably foldable, allows for quick head replacement, and features a safe anti-scalding function. Utility Model Content

[0003] The purpose of this application is to provide a portable and easy-to-store hot air comb and its components, which has the advantages of compact structure, reliable folding, convenient comb head replacement and anti-scalding safety.

[0004] This application provides a portable and easy-to-store hot air comb, the technical solution of which is as follows: it includes a handle 1 and an air outlet 2, characterized in that a self-rotating structure 3 is provided between the handle 1 and the air outlet 2, so that the air outlet 2 can rotate and overlap relative to the handle 1; the other end of the air outlet 2 is connected to an anti-scalding comb head 5 through a first buckle assembly 4. The spin structure 3 includes: a rotating part 21 disposed at the end of the air outlet duct 2, including a guide cylinder 21 and a central guide post 22 coaxially nested, with a first spring 23 sleeved around the central guide post 22; a sliding member 24 axially slidably disposed in the inner cavity of the guide cylinder 21 and connected to one end of the first spring 23, with a central positioning hole 241 at its top and multiple locking protrusions 242 extending radially from its outer wall with parallel axes; a handle 1 having a connecting surface 11 on its side facing the air outlet duct 2; the connecting surface 11 having a central main locking hole 111 and multiple circumferentially distributed secondary locking holes 112; the main locking hole 111 and the central guide post 22 passing through the central positioning hole 241 form an axial guiding engagement, and the locking protrusions 242 engage with the corresponding secondary locking holes 112 to achieve locking; a lifting assembly 12 located on the rear side of the connecting surface 11 for pushing out the locking protrusions 242 engaged in the secondary locking holes 112 when unlocking is required.

[0005] Furthermore, this application also proposes that four axial locking protrusions 242 are evenly distributed on the outer wall of the guide cylinder 21, the head of the locking protrusion 242 extends axially beyond the head of the sliding member 24 and forms an insertion section 242a that is interference-fitted with the secondary locking hole 112; the inner circumferential wall of the guide cylinder 21 is provided with an axially extending arc notch 211, the number of arc notches 211 is the same as the number of locking protrusions 242, which is used to restrict the circumferential rotation of the sliding member 32.

[0006] Furthermore, this application also proposes that the number of secondary locking holes 112 on the connecting surface 11 is an integer multiple of the number of locking protrusions 242.

[0007] Furthermore, this application also proposes that the lifting assembly 12 includes: a button 121 disposed on the surface of the handle 1; an inclined push block 122 with one end perpendicularly fixed to the button 121, and a second spring 124 sleeved on the other end; a frustum 123 with a lifting inclined surface, which lifts and cooperates with the inclined push block 122; and top posts 125 evenly distributed circumferentially on the top surface of the frustum 123, the number of which is the same as the number of secondary locking holes, and the distribution spacing of which matches the phase of the secondary locking holes 112 of the connecting surface 11.

[0008] Furthermore, this application also proposes that the anti-scalding comb includes a three-dimensional circular brush comb head 51, with a handle 511 located at the center of the end away from the air outlet 2; the main body of the handle 511 is a long elliptical cylinder structure, and has an asymmetrical curved surface 511a in the left and right directions of its long axis, with the two ends of the long axis extending to form reverse warped portions 511b; the sidewall of the handle 511 is evenly distributed with longitudinally extending anti-slip ridges 511c; the upper part of the handle 511 is provided with a handle head 511d, the size of which is larger than the lower body of the handle 511 in all circumferential directions, in order to increase the contact area between the hand and the handle 511.

[0009] Furthermore, this application also proposes that the anti-scalding comb includes a single-sided brush comb 52, which has a guide baffle 521 inside. The guide baffle 521 divides the inner cavity of the single-sided brush comb 52 into a lower guide cavity 522 and an upper isolation cavity 523. The guide baffle 521 is a long arc-shaped plate that extends downward from the top of the air inlet 524 of the single-sided brush comb 52 to the tail of the comb. The arc surface of the guide baffle 521 protrudes towards the isolation cavity 523 to form an airflow guiding surface.

[0010] Furthermore, this application also proposes that the first buckle assembly 4 includes: an annular base 25 disposed on the side of the air outlet 2 facing the anti-scalding comb head, the inner wall of which is provided with a radially protruding wedge-shaped locking block 26; and a retaining ring 53 disposed on the connecting end of the anti-scalding comb head, the outer edge of which is provided with an L-shaped locking groove 54 that matches the wedge-shaped locking block 26, and the L-shaped locking groove 54 is provided with a limiting boss 55 with an arc surface.

[0011] Furthermore, this application also proposes that the other end of the handle 1 is connected to a power cord 7 via a quick-connect structure 6. The quick-connect structure 6 includes: a socket 13 located on the side of the handle 1 facing the anti-scalding comb, a conductive post 131 inside the socket 13, and a slot 132 at the top of the conductive post 131; a plug 61 that plugs into the socket 13, including a housing 611, a first latching assembly 612 in the upper half of the housing 611, the first latching assembly 612 and the slot 132 forming a separable locking engagement; a connector 613 at the front end of the lower half of the housing 611 that engages with the conductive post 131, and a conductive element 614 connected to the connector 613 inside the housing 611; and a power cord 7 connected to the plug 61, with a first conductive cylinder 71 and a second conductive cylinder 72 inserted into the housing 611 at one end near the plug 61, for circumferentially rotating and sliding with the conductive element 614 to conduct electricity, wherein the circumferential rotation refers to continuous rotation around the central axis in 360°.

[0012] Furthermore, this application also proposes that the housing 611 has an annular groove 615 in the inner cavity at one end near the power line 7, and a retaining ring 73 is provided on the outer periphery of the second conductive cylinder 72, which is engaged in the annular groove 615.

[0013] Furthermore, this application also proposes that the air outlet duct 2 integrates a heating element 27 and an air outlet motor 28, and the handle 1 is provided with a control circuit board 14; the bottom of the self-rotating guide cylinder 21 is provided with a through-type wire passage 8, and the wires connecting the heating element 27, the air outlet motor 28 and the control circuit board 14 are laid in the wire passage 8.

[0014] As can be seen from the above, the hot air comb and its components provided in this application are easy to carry and store. The air outlet and the handle are rotated and stacked through a self-rotating structure. With the first buckle component, the anti-scalding comb head can be quickly replaced. This solves the problems of large size, unstable folding and inconvenient comb head replacement of traditional hot air combs. It has the advantages of compact structure, reliable folding, convenient comb head replacement and anti-scalding safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this application;

[0016] Figure 2 This is a cross-sectional view showing the connection between the handle and the hair dryer via a spin mechanism.

[0017] Figure 3 The application includes an exploded view of the blower and the spin structure;

[0018] Figure 4 This is a structural diagram of the handle connection surface;

[0019] Figure 5 This is an exploded view of the handle of this application;

[0020] Figure 6 This is a schematic diagram of the structure of the three-dimensional circular brush head of this application;

[0021] Figure 7 This is an exploded view of the single-sided brush comb of this application.

[0022] Figure 8 This is a schematic diagram of the handle and quick-connect structure of this application.

[0023] Figure 9 This is a schematic diagram of the handle socket of this application.

[0024] Figure 10 This is an exploded view of the quick-connect structure of this application. Detailed Implementation

[0025] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] In existing technologies, traditional hot air combs typically employ a fixed structure, resulting in a large size that is difficult to store and takes up considerable space when carried. While some foldable designs can reduce size, the stability of the rotating structure is insufficient, leading to loosening after folding and affecting the user experience. Furthermore, the connection between the comb head and the main body is relatively simple, making replacement cumbersome, and existing comb heads lack effective anti-scalding designs, posing a risk of burns during use. For example, when carrying them out, traditional hot air combs are difficult to fit into a bag because they cannot be folded tightly, and loosening of the structure when folded can lead to component damage.

[0027] To address the aforementioned issues, a hot air comb needs to be designed that enables both stable folding and quick head replacement. To address the insufficient stability of the folding structure, a rotatable and locking mechanical structure is considered between the main body and the air outlet, using a combination of axial positioning and circumferential locking to improve stability. To address the inconvenience of head replacement, a modular snap-fit ​​connection scheme is adopted, allowing for quick disassembly and installation of the comb. Simultaneously, the internal airflow guidance design of the comb needs to be optimized to reduce surface temperature and improve safety.

[0028] Therefore, this application proposes a hot air comb including a handle and an air outlet. A self-rotating structure is provided between the handle and the air outlet, allowing the air outlet to rotate and overlap relative to the handle. The other end of the air outlet is connected to an anti-scalding comb head via a first snap-fit ​​assembly. The self-rotating structure includes a rotating part, which is composed of a coaxially nested guide cylinder and a central guide post. A first spring is sleeved around the central guide post. A sliding member is axially slidably disposed within the inner cavity of the guide cylinder. A central positioning hole is opened at the top of the sliding member, and multiple locking protrusions with parallel axes extend radially from the outer wall. A connecting surface is provided on the side of the handle facing the air outlet. The connecting surface has a central main locking hole and multiple circumferentially distributed secondary locking holes. The main locking hole forms an axial guiding engagement with the central guide post, and the locking protrusions engage with the secondary locking holes to achieve locking. A lifting assembly is provided on the rear side of the connecting surface to push out the locking protrusions when unlocking.

[0029] The self-rotating structure refers to the mechanical component that enables the air outlet and handle to rotate and overlap. Specifically, it can be achieved by using a coaxially nested guide cylinder and a central guide post in conjunction with a sliding component. A combination of axial sliding and circumferential engagement ensures rotational positioning stability. The central positioning hole is a hole on the top of the sliding component, used to form an axial positioning fit with the main locking hole of the handle, preventing offset during rotation. The locking protrusion is a radially extending columnar structure on the outer wall of the sliding component. Specifically, it can be an interference-fitted insert section that engages with the secondary locking hole, restricting the relative rotation between the air outlet and the handle. The lifting assembly is the unlocking mechanism located on the rear side of the connecting surface. Specifically, it can be a structure of an inclined push block and a frustum-shaped top post. Through mechanical linkage, the locking protrusion is pushed out of the secondary locking hole, achieving rapid unlocking.

[0030] Specifically, when the hot air comb needs to be folded, pressing the lifting component triggers the inclined push block to push the truncated cone, and the top column pushes the locking protrusion out of the secondary locking hole, releasing the circumferential lock. At this time, the air outlet can rotate around the central guide column to the overlapping state with the handle, and the first spring provides axial restoring force to keep the sliding part in a stable position. When unfolding, the air outlet rotates in the opposite direction, and the locking protrusion re-engages into the secondary locking hole under the action of the spring, forming a circumferential fixation. The anti-scalding comb head is connected to the air outlet through the first snap-fit ​​assembly, and the wedge-shaped snap-fit ​​block in the first snap-fit ​​assembly cooperates with the L-shaped locking groove to achieve quick assembly and disassembly. The anti-scalding comb head includes a three-dimensional ring brush comb head with a handle away from the heat source and a single-sided brush comb head with a guide baffle inside. The handle of the three-dimensional ring brush comb head is located in the middle of its distal end face, which can effectively avoid the heat source. The guide baffle inside the single-sided brush comb head guides the airflow to the area away from the user's touch, reducing the surface temperature.

[0031] Compared to existing technologies, traditional folding structures rely on a single buckle or spring for positioning, which is prone to wear and loosening over long-term use. This solution utilizes a dual locking mechanism, where the central guide post and the main locking hole work together axially to lock the protruding post and the secondary locking hole circumferentially, significantly improving structural stability in the folded state. Existing comb heads typically use threaded or fixed plug connections, requiring multiple rotations or significant external force for replacement. This solution, through a modular buckle design, enables one-click assembly and disassembly of the comb head, significantly improving ease of operation. Furthermore, existing products lack optimized design for airflow guidance or effective heat source isolation, while this solution's airflow deflector effectively reduces the temperature of the comb head contact surface, minimizing the risk of burns, and the handle provides effective heat source isolation.

[0032] Through the above technical solution, this application achieves a compact folding and stable locking of the hot air comb, preventing component damage due to structural loosening during transport. The quick-release design of the anti-scalding comb head and air outlet simplifies the replacement process and meets users' needs for different comb functions. The handle is located at the far end, away from the heat source, and the baffle effectively isolates the high-temperature airflow, reducing the temperature of the comb head contact surface and improving safety during use.

[0033] This application further proposes that the outer wall of the guide cylinder is uniformly distributed with four axial locking protrusions, the head of the locking protrusions extends axially beyond the head of the sliding member and forms an insertion section that is interference-fitted with the secondary locking hole; the inner circumferential wall of the guide cylinder is provided with axially extending arc notches, the number of arc notches being the same as the number of locking protrusions, for limiting the circumferential rotation of the sliding member.

[0034] The axial locking protrusion refers to a columnar protrusion arranged axially along the outer wall of the guide cylinder. It can be made of metal or engineering plastic, and its extended head can be inserted into the secondary locking hole to form a mechanical lock. The insertion section refers to the extension of the locking protrusion beyond the sliding component. It can be a conical or mushroom-shaped structure, and is embedded into the inner wall of the secondary locking hole through an interference fit to achieve anti-pull-out function. The arc notch refers to an arc-shaped groove opened along the axial direction on the inner wall of the guide cylinder. It can be processed by stamping or injection molding, and its curvature matches the outer contour of the sliding component to restrict relative rotation.

[0035] Specifically, four locking protrusions are evenly distributed on the outer wall of the guide cylinder, for example, arranged in a 90-degree circumferential pattern, so that a four-point symmetrical locking is formed after the insertion section is inserted into the secondary locking hole, enhancing structural stability. When the sliding part moves axially, the locking protrusions on its outer wall are restricted from circumferential rotation by the arc notch and can only slide axially; the interference fit between the insertion section and the secondary locking hole generates frictional resistance, preventing accidental unlocking due to vibration in the folded state.

[0036] Compared with existing technologies, traditional folding structures mostly use single-point buckles or elastic pins for locking, which are prone to loosening due to uneven force. In contrast, this solution uses four symmetrically distributed locking protrusions to cooperate with secondary locking holes, combined with arc notches to limit the circumferential movement of the sliding parts, forming a double locking mechanism that significantly improves the anti-torsion performance in the folded state.

[0037] Through the above technical solution, this application solves the problems of easy loosening and unreliable locking in the traditional hot air comb folding structure, realizes a stable connection between the air outlet and the handle in the storage state, avoids wear caused by component shaking when carrying, and extends the service life of the locking mechanism.

[0038] This application further proposes that the number of secondary locking holes on the connecting surface be an integer multiple of the number of locking protrusions.

[0039] The requirement that the number of secondary locking holes be an integer multiple of the number of locking protrusions means that the total number of secondary locking holes distributed circumferentially on the connecting surface is an integer multiple of the number of locking protrusions extending from the outer wall of the sliding component at the end of the air outlet. Specifically, this can be achieved by using four sets of locking protrusions corresponding to eight or twelve secondary locking holes. This design increases the density of locking points, providing more selectable positioning positions when adjusting the rotation angle.

[0040] Specifically, when the air outlet rotates relative to the handle, the locking protrusions sequentially engage with different secondary locking holes circumferentially. Since the number of secondary locking holes is an integer multiple of the number of locking protrusions, all locking protrusions simultaneously fall into their corresponding secondary locking holes after each rotation. For example, when four sets of locking protrusions match eight secondary locking holes, the rotation angle can be selected in two modes: 90 degrees or 45 degrees, achieving multi-level adjustment.

[0041] Compared to existing technologies, traditional rotary structures only have a single locking position or a fixed number of engagement points, resulting in limited angle adjustment and easy engagement failure due to machining errors. This solution uses an integer multiple design to ensure that multiple locking protrusions can simultaneously and accurately engage with their corresponding holes, while also providing more selectable rotary positioning angles.

[0042] Through the above technical solution, this application effectively solves the problem of the single adjustment angle of the traditional hot air comb rotation structure. Through the expandable locking hole layout, more compact forms can be selected when folding and storing. At the same time, when unfolded for use, the air outlet angle can be flexibly adjusted according to the operational needs, which improves the product's ease of use and structural reliability.

[0043] This application further proposes a lifting assembly including a button on the surface of the handle, an inclined push block with one end perpendicularly fixed to the button, a second spring sleeved on the other end of the inclined push block, a truncated cone with a lifting inclined surface that lifts and engages with the inclined push block, and top posts with the same number of secondary locking holes evenly distributed on the top surface of the truncated cone in the circumferential direction, the distribution spacing of the top posts matching the phase of the secondary locking holes on the connecting surface.

[0044] The button refers to the operating component located on the outer surface of the handle, which can be implemented as a push-button mechanical switch, used to trigger the action of the lifting assembly. The inclined push block is a transmission component perpendicularly connected to the button, which can be implemented as a slider structure with an inclined contact surface, converting the button's pressing action into lateral displacement through the inclined contact. The frustum refers to the transmission mechanism with a lifting inclined surface, which can be implemented as a frustum of a cone structure. Its inclined angle forms a sliding fit with the inclined push block, converting lateral displacement into vertical lifting force. The ejector pin is a columnar ejector component circumferentially distributed on the top of the frustum, which can be implemented as a cylindrical pin structure. Its phase distribution corresponds to the position of the secondary locking holes on the connecting surface, ensuring that the ejection action acts synchronously on all locking protrusions.

[0045] Specifically, when the button is pressed, the inclined push block moves axially and compresses the second spring. The inclined surface of the push block slides relative to the lifting inclined surface of the frustum, causing the frustum to displace vertically. Since the top posts are evenly distributed circumferentially on the top surface of the frustum and their phase matches the secondary locking hole, the top posts synchronously push into the secondary locking hole of the connecting surface when the frustum rises, pushing the locking protrusion out of the engaged state. When the button is released, the second spring pushes the inclined push block to reset, and the frustum descends, causing the top posts to exit the secondary locking hole. The locking protrusion, under the action of the first spring of the spin-type structure, re-engages into the secondary locking hole to complete the locking.

[0046] Compared with existing technologies, traditional lifting mechanisms mostly adopt a single-point lifting structure, which makes it difficult to achieve synchronous unlocking of multiple locking points and easily leads to structural skewing and jamming. This solution uses a circumferentially distributed design of frustum and top column, and utilizes inclined plane transmission to achieve synchronous lifting of multiple points, ensuring that each locking protrusion is subjected to uniform force and avoiding wear problems caused by local stress concentration.

[0047] Through the above technical solution, this application achieves a multi-locking point synchronous release function, effectively improving the smoothness of unlocking the folding structure and preventing rotational jamming caused by incomplete unlocking on one side. The phase-matching design of the top column and the secondary locking hole ensures precise correspondence of the lifting position, eliminates structural interference during the unlocking process, and improves operational reliability.

[0048] This application further proposes an anti-scalding comb head including a three-dimensional circular brush comb head, with a handle in the middle of the end away from the air outlet; the main body of the handle is a long elliptical cylinder structure, and has an asymmetrical curved surface in the left and right directions of its long axis, with the two ends of the long axis extending to form reverse warped parts; the side wall of the handle is evenly distributed with longitudinally extending anti-slip ridges; the upper part of the handle is provided with a handle head, the size of which is larger than the lower body of the handle in all circumferential directions, in order to increase the contact area between the hand and the handle.

[0049] The key features of the rotating handle include: a long elliptical cylinder structure (e.g., a major axis of 25-30 mm and a minor axis of 15-20 mm) for an ergonomic grip; an asymmetrical curved surface (e.g., a left-side curved surface with a larger radius of curvature than the right side for easier finger rotation); a reverse warping section (e.g., an upward-sloping arc-shaped extension at 5-10 degrees to limit finger slippage); anti-slip ridges (e.g., strip-shaped protrusions spaced longitudinally along the handle to enhance friction); and an enlarged handle head (e.g., a frustum-shaped structure 2-3 mm larger in diameter than the main body for a larger contact area).

[0050] Specifically, the 3D circular brush head allows for quick assembly and disassembly via a rotating handle. When replacing the brush head, the operator grasps the elongated elliptical cylinder of the handle and uses the asymmetrical curved surface to identify the direction of rotation. When applying torque by pressing the reverse warping portion with the fingers, the longitudinal anti-slip ridges prevent slippage, while the enlarged structure of the handle head provides support for the thumb. For example, during disassembly, the operator grasps the concave-convex area formed by the handle head and the asymmetrical curved surface and rotates it in a specific direction to separate the brush head from the air outlet's locking mechanism. This handle structure, through the combination of geometry and surface features, allows for assembly and disassembly without direct contact with the high-temperature air outlet.

[0051] Compared to existing technologies, traditional hot air combs typically use symmetrical cylindrical knobs, which suffer from unclear force direction and slippage when rotating. While some products feature anti-slip textures, they fail to consider ergonomic curved surfaces and the need for asymmetrical force application. This solution combines a long elliptical cylinder with an asymmetrical curved surface to clearly define the rotation direction; the combination of the reverse warping section and anti-slip protrusions simultaneously solves the problems of force application stability and slip resistance.

[0052] Through the above technical solutions, this application realizes the rapid identification of the operation direction during the assembly and disassembly of the comb, reducing the risk of component damage due to misoperation; the increased contact area of ​​the handle and the asymmetrical structure allow the operator to complete the assembly and disassembly without gripping the high-temperature area, significantly improving the safety of preventing burns; the synergistic effect of the longitudinal anti-slip ridges and the reverse warping part ensures stable grip when rotating and applying force, avoiding the risk of burns caused by slipping.

[0053] This application further proposes an anti-scalding comb head including a single-sided brush comb head, which has an internal baffle. The baffle divides the inner cavity of the single-sided brush comb head into a lower baffle cavity and an upper isolation cavity. The baffle is inclined at an acute angle to the axis of the air outlet. The baffle is a long, arc-shaped plate that extends downward from the top of the air inlet of the single-sided brush comb head to the tail of the comb head. The arc surface of the baffle protrudes towards the isolation cavity to form an airflow guiding surface.

[0054] The baffle is an inclined plate structure located inside the single-sided brush head. It can be made of high-temperature resistant plastic or ceramic materials and fixed to the inner wall of the brush head via injection molding or welding. It guides airflow away from the user's contact area. The flow-guiding cavity is the space below the baffle, formed by the gap between the baffle and the bottom of the brush head. It concentrates the hot airflow to the comb teeth. The isolation cavity is a closed space above the baffle, formed by the baffle and the closed structure at the top of the brush head. It prevents the hot airflow from directly contacting the upper surface of the brush head. The elongated arc-shaped plate is an arc-shaped plate structure extending along the length of the brush head. It can be made from a single-piece molded curved sheet material, with its curvature matching the contour of the brush head's inner cavity for a tight fit. The convex surface facing the isolation cavity guides the curvature of the baffle towards the upper isolation cavity. This can be achieved through a molding process to form a continuous, smooth convex surface, altering the airflow trajectory and reducing turbulence.

[0055] Specifically, when hot air enters the single-sided brush head from the air outlet, the acute-angled inclined structure of the baffle forces the airflow into two paths: one path enters the guide cavity along the lower surface of the baffle and is directly guided to the comb teeth; the other path is deflected upwards by the curved surface of the baffle and enters the isolation cavity. Due to the convex design of the curved surface of the baffle, the airflow path into the isolation cavity is extended, and heat is dissipated through the wall of the isolation cavity. The extended length of the baffle covers the entire area from the air inlet to the tail of the brush head, ensuring that the airflow is controlled by the guide structure throughout the entire delivery process. The spatial separation between the guide cavity and the isolation cavity effectively reduces the outer surface temperature of the brush head while maintaining the hot air output efficiency.

[0056] Compared to existing technologies, traditional hot air combs lack a directional airflow structure inside the comb head, resulting in excessively high surface temperatures due to direct contact between the high-temperature airflow and the comb head shell. This solution utilizes a dual-cavity structure formed by airflow guide baffles to physically separate the working airflow from the shell isolation area. Furthermore, the baffle's tilt angle and curved protrusions optimize airflow distribution, significantly reducing the temperature of the accessible areas of the shell.

[0057] Through the above technical solution, this application solves the problem of insufficient anti-scalding design of existing hot air combs. By guiding the airflow path with a baffle and separating the cavity, the high-temperature area is limited to a non-contact position while ensuring the hot air output function, effectively avoiding the risk of burns caused by users contacting high-temperature components during operation.

[0058] This application further proposes a first buckle assembly including an annular base on the side of the air outlet facing the anti-scalding comb, the inner wall of which is provided with a radially protruding wedge-shaped locking block; and a retaining ring on the connecting end of the anti-scalding comb, the outer edge of which is provided with an L-shaped locking groove that matches the wedge-shaped locking block, and the L-shaped locking groove is provided with a limiting boss with an arc surface.

[0059] The annular base refers to the annular support component fixed to the connection end of the air outlet duct. It can be made of injection-molded polycarbonate material. The wedge-shaped locking block on the inner wall of the base forms an axial limit by engaging with the L-shaped locking groove of the retaining ring. The L-shaped locking groove is a continuous groove with vertical and horizontal sections. It can be milled to form a groove structure with a corner guide surface. The vertical section allows for axial insertion of the retaining ring and the wedge-shaped locking block, while the horizontal section allows for circumferential rotation locking. The limiting boss is an arc-shaped protrusion structure set within the L-shaped locking groove. It can be formed by injection molding with a guide slope. When the retaining ring rotates to the locked position, the arc surface of the limiting boss forms an interference fit with the wedge-shaped locking block.

[0060] Specifically, when installing the anti-scalding comb head, align the vertical section of the L-shaped locking groove of the retaining ring with the wedge-shaped locking block of the annular base and press it down, causing the wedge-shaped locking block to embed into the vertical section of the locking groove. Then rotate the retaining ring; the wedge-shaped locking block slides along the horizontal section of the L-shaped locking groove. When it rotates to the position of the limiting boss, the arc surface of the boss and the wedge-shaped locking block undergo elastic deformation, forming an interference fit and locking. For disassembly, rotate the retaining ring in the opposite direction; the guide slope of the limiting boss causes the wedge-shaped locking block to disengage from the horizontal section of the locking groove, achieving quick separation.

[0061] Compared to existing technologies, traditional hot air combs use threaded connections or pin fixation, which result in cumbersome assembly and disassembly processes and easy wear of connecting parts. This solution simplifies the installation process to two steps—pressing and rotating—through a rotating locking structure using an L-shaped locking groove and a wedge-shaped locking block. Meanwhile, the interference fit of the limiting boss effectively prevents accidental loosening during use.

[0062] Through the above technical solution, this application realizes the quick installation and removal of the anti-scalding comb head. The operation process does not require tools and can be completed with one hand. At the same time, it ensures the stable connection between the comb head and the air outlet, and avoids connection failure caused by vibration under high temperature use.

[0063] This application further proposes that the other end of the handle is connected to a power cord via a quick-connect structure. The quick-connect structure includes a socket located on the side of the handle facing the anti-scalding comb head, with a conductive post inside the socket and a slot at the top of the conductive post. The plug that is inserted into the socket includes a housing, with a barbed buckle on the upper half of the housing, which forms a detachable locking engagement with the slot. The lower half of the housing has a connector at the front end that engages with the conductive post, and a conductive element connected to the connector is located inside the housing. The power cord connected to the plug has a first conductive cylinder and a second conductive cylinder inserted into the housing at the end near the plug, for circumferentially rotating and sliding with the conductive element to conduct electricity.

[0064] The quick-connect structure refers to a detachable component that achieves electrical connection through a plug-in method. Specifically, it can be achieved by using a plug with a guide positioning structure to cooperate with the socket, and a locking state is formed by the engagement of the barbed latch and the slot. The circumferential rotation sliding energization means that the conductive cylinder and the conductive component maintain continuous contact when the plug rotates circumferentially. Specifically, it can be achieved by using a combination of annular contact pieces and elastic contacts to ensure that the power cord remains energized at any rotation angle.

[0065] Specifically, the conductive post inside the socket and the connector inside the plug form an axial insertion fit, and the barbed buckle engages with the slot to create a mechanical lock. After the conductive cylinder at the end of the power cord is inserted into the housing, the second conductive cylinder achieves axial restraint through the engagement of the retaining ring and the annular slot, while the first conductive cylinder forms a circumferential rotational contact with the conductive component. When the plug rotates around the socket axis, the conductive cylinder slides along the annular contact surface of the conductive component, allowing the power cord to be freely wound at an adjustable angle without affecting power supply during storage.

[0066] Compared to existing technologies, traditional power cords, which use fixed welding or threaded connections, make replacement and maintenance difficult and are prone to breakage when twisted. This solution, through a quick-connect structure with snap-locking and rotating conductive design, ensures both connection reliability and allows the power cord to rotate freely, effectively avoiding contact problems caused by repeated bending.

[0067] Through the above technical solution, this application achieves the functions of quick plugging and unplugging and free circumferential rotation of the power cord, solving the technical defects of traditional fixed power cords that are prone to tangling and damage. The snap-fit ​​between the plug and the socket improves the connection stability, and the rotating contact structure between the conductive cylinder and the conductive component ensures continuous power supply while allowing the power cord to be coiled at different angles during storage.

[0068] This application further proposes that the housing has an annular groove in the inner cavity at one end near the power line, and a retaining ring is provided on the outer periphery of the second conductive cylinder, with the retaining ring engaging in the annular groove.

[0069] The annular groove refers to a ring-shaped groove structure located inside the housing near the power cord connection point. It can be integrally molded inside the housing using injection molding, and its groove depth can be slightly less than the thickness of the retaining ring to achieve an interference fit. The retaining ring is an annular protrusion structure fitted around the outer circumference of the second conductive cylinder. It can be made of elastic metal material through stamping, and its radial elastic deformation enables it to engage and lock with the annular groove.

[0070] Specifically, when the power cord is inserted into the housing, the retaining ring at the end of the second conductive cylinder is compressed radially by the inner wall of the housing cavity until it reaches the position of the annular retaining groove, after which it elastically recovers and embeds into the annular retaining groove to form an axial limit. This structure allows the power cord to rotate circumferentially while connected, while preventing accidental dislodgement due to axial displacement.

[0071] In some specific embodiments, the retaining ring can be designed as a segmented structure, for example, consisting of two arc-shaped protrusions spaced 180 degrees apart, to reduce insertion resistance during assembly. The bottom of the annular retaining groove can be provided with a sloping guide surface, allowing the retaining ring to elastically disengage by applying axial tensile force during disassembly.

[0072] Compared to existing technologies, current power cord connections often use threaded tightening or plug-in followed by adhesive sealing, resulting in low assembly efficiency and difficult disassembly. This solution utilizes a snap ring and annular groove for elastic engagement, achieving both quick plugging and unplugging while ensuring connection stability and preventing poor contact caused by aging of the adhesive sealing material.

[0073] Through the above technical solution, this application effectively solves the problem of contact failure caused by frequent bending at the connection between the power cord and the plug. The mechanical interlocking design of the retaining ring and the annular groove can resist external pulling force, ensure continuous electrical contact between the conductive cylinder and the connector, and reduce the risk of electric arcing caused by loose connection.

[0074] This application further proposes that the air outlet duct integrates a heating element and an air outlet motor, and the handle contains a control circuit board; the bottom of the self-rotating guide cylinder is provided with a through-type wire passage, and the wires connecting the heating element, the air outlet motor and the control circuit board are laid in the wire passage.

[0075] The heating element refers to the device used to generate hot air, which can be implemented using electric heating wires or ceramic heating elements. Its function is to provide hot air output for the comb. The air outlet motor is the component that drives the airflow, which can be implemented using centrifugal fans or axial fans. Its function is to deliver hot air to the combing area. The control circuit board is the electronic module used to control the heating element and the air outlet motor. It can be implemented using a circuit board with a temperature control chip. Its function is to regulate the power of the device and provide overheat protection. The through-type wire guide channel is a tubular structure that runs through the axial direction of the guide cylinder. It can be implemented using injection-molded hollow cylinders. Its function is to provide a fixed path for the wires to avoid tangling during folding.

[0076] Specifically, the heating element and the fan motor are integrated inside the air outlet casing, and are electrically connected to the control circuit board via wires. The wires pass through a through-type wire channel at the bottom of the guide cylinder, the axis of which coincides with the rotation axis of the spinneret, so that the wires can rotate synchronously with the channel when the air outlet casing rotates relative to the handle, thus avoiding bending. The wires are arranged in a spiral shape within the wire channel, with a certain amount of slack to accommodate length changes during rotation.

[0077] Compared to existing technologies, the internal wiring of traditional hot air combs typically passes directly through the gaps in the rotating structure, making the wires prone to wear or breakage due to repeated folding. This solution, however, uses a through-type wire passageway to ensure the wires remain within a protected, fixed path during rotation, while the spiral arrangement effectively alleviates tensile stress on the wiring.

[0078] Through the above technical solution, this application achieves centralized management and reliable protection of internal circuits, avoiding the risk of wire entanglement or breakage during folding. At the same time, the compact integrated layout reduces the internal space occupation, thereby improving the mechanical stability of the rotating structure and the reliability of electrical connections simultaneously.

[0079] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A portable and easy-to-store hot air comb, comprising a handle (1) and an air outlet (2), characterized in that, A self-rotating structure (3) is provided between the handle (1) and the air outlet (2), so that the air outlet (2) can rotate and overlap relative to the handle (1); the other end of the air outlet (2) is connected to an anti-scalding comb (5) through a first buckle assembly (4); The spin structure (3) includes: The rotating part (20) located at the end of the air outlet (2) includes a guide cylinder (21) and a central guide post (22) nested together on the same axis. A first spring (23) is sleeved around the central guide post (22). A sliding member (24) is axially slidably disposed in the inner cavity of the guide cylinder (21) and connected to one end of the first spring (23). It has a central positioning hole (241) at its top and multiple locking protrusions (242) with parallel axes extending radially from its outer wall. The handle (1) has a connecting surface (11) on the side facing the air outlet (2); the connecting surface (11) has a central main locking hole (111) and a plurality of circumferentially distributed secondary locking holes (112); the main locking hole (111) and the central guide post (22) through the central positioning hole (241) form an axial guiding engagement, and the locking protrusion (242) engages with the corresponding secondary locking hole (112) to achieve locking; a lifting assembly (12) is provided on the rear side of the connecting surface (11) for pushing out the locking protrusion (242) engaged in the secondary locking hole (112) when unlocking is required.

2. The portable and easily stored hot air comb according to claim 1, characterized in that, The outer wall of the guide cylinder (21) is evenly distributed with four axial locking protrusions (242). The head of the locking protrusion (242) extends axially beyond the head of the sliding member (24) and forms an insertion section (242a) that is interference-fitted with the secondary locking hole (112). The inner circumferential wall of the guide cylinder (21) is provided with an axially extending arc notch (211). The number of arc notches (211) is the same as the number of locking protrusions (242), which are used to restrict the circumferential rotation of the sliding member (24).

3. A portable and easy-to-store hot air comb according to claim 1, characterized in that, The number of secondary locking holes (112) on the connecting surface (11) is an integer multiple of the number of locking protrusions (242).

4. A portable and easy-to-store hot air comb according to claim 1, characterized in that, The lifting assembly (12) includes: A button (121) is provided on the surface of the handle (1); An inclined push block (122) with one end fixed perpendicularly to the button (121) has a second spring (124) sleeved on the other end; A frustum (123) with a lifting ramp is provided, which is lifted and engaged with the ramp push block (122); The number of top posts (125) that are circumferentially distributed on the top surface of the frustum (123) is the same as the number of secondary locking holes, and their distribution spacing matches the phase of the secondary locking holes (112) on the connecting surface (11).

5. A portable and easily stored hot air comb according to claim 1, characterized in that, The anti-scalding comb includes a three-dimensional circular brush comb (51), with a handle (511) at the middle of the end away from the air outlet (2); the main body of the handle (511) is a long elliptical cylinder structure, and has an asymmetrical curved surface (511a) in the left and right directions of its long axis, with the two ends of the long axis extending to form a reverse warped part (511b); the side wall of the handle (511) is evenly distributed with longitudinally extending anti-slip ridges (511c); the upper part of the handle (511) is provided with a handle head (511d), the size of which is larger than the lower body of the handle (511) in all circumferential directions, in order to increase the contact area between the hand and the handle (511).

6. A portable and easy-to-store hot air comb according to claim 1, characterized in that, The anti-scalding comb includes a single-sided brush comb (52), which has a guide baffle (521) inside. The guide baffle (521) divides the inner cavity of the single-sided brush comb (52) into a lower guide cavity (522) and an upper isolation cavity (523). The guide baffle (521) is a long arc-shaped plate that extends downward from the top of the air inlet (524) of the single-sided brush comb (52) to the tail of the comb. The arc surface of the guide baffle (521) protrudes towards the isolation cavity (523) to form an airflow guiding surface.

7. A portable and easy-to-store hot air comb according to claim 1, characterized in that, The first snap-fit ​​assembly (4) includes: An annular base (25) is provided on the side of the air outlet (2) facing the anti-scalding comb, and its inner wall is provided with a radially protruding wedge-shaped block (26); The retaining ring (53) located at the connection end of the anti-scalding comb has an L-shaped locking groove (54) on its outer edge that matches the wedge-shaped retaining block (26), and the L-shaped locking groove (54) has a limiting boss (55) with an arc surface inside.

8. A portable and easy-to-store hot air comb according to claim 1, characterized in that, The other end of the handle (1) is also connected to a power cord (7) via a quick-connect structure (6), the quick-connect structure (6) comprising: A socket (13) is provided on the side of the handle (1) facing the anti-scalding comb head. A conductive post (131) is provided in the socket (13), and a slot (132) is provided on the top of the conductive post (131). The plug (61) that is inserted into the socket (13) includes a housing (611), the upper half of which is provided with a snap-fit ​​assembly (612), the snap-fit ​​assembly (612) and the slot (132) forming a separable locking engagement; the lower half of the housing (611) is provided with a connector (613) that is inserted into the conductive post (131) at the front end, and the housing (611) is provided with a conductive element (614) that is connected to the connector (613) inside; The power cord (7) connected to the plug (61) has a first conductive cylinder (71) and a second conductive cylinder (72) inserted into the housing (611) at one end near the plug (61), which are used to rotate and slide with the conductive component (614) to conduct electricity.

9. A portable and easily stored hot air comb according to claim 8, characterized in that, The housing (611) has an annular groove (615) in the inner cavity at one end near the power line (7), and the second conductive cylinder (72) has a retaining ring (73) on its outer periphery, which is engaged in the annular groove (615).

10. A portable and easily stored hot air comb according to claim 1, characterized in that, The air outlet (2) integrates a heating element (27) and an air outlet motor (28), and the handle (1) is equipped with a control circuit board (14); the bottom of the guide cylinder (21) of the spin structure is provided with a through-type wire passage (8), and the wire passage (8) is provided with wires connecting the heating element (27), the air outlet motor (28) and the control circuit board (14).

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