Hair styling device

Abstract

The utility model provides a hair styling device, and relates to the related technical field of hair treatment equipment. The hair styling device comprises a main body structure, and the main body structure comprises a handle part and an annular adapter cover. The handle part comprises a shell, the shell is of a cylindrical structure, an air supply unit is arranged in the shell, and a divergent connecting port is formed in the first end of the shell. The annular adapter cover covers the connecting port and is matched with the shell to form a containing cavity, and a heating unit is arranged in the containing cavity; the joint of the annular adapter cover and the shell protrudes outwards in the radial direction to form an annular boss, and a key assembly is arranged on the annular boss. The main body structure of the hair styling device is optimized, the annular boss is formed on the peripheral side of one end of the hair styling device, the key assemblies are integrated to the annular boss, optimized arrangement of the key assemblies is achieved, a user can operate the key assemblies with one hand, and user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to hair processing equipment, in particular to a hair styling device. Background Art

[0002] In the current personal care appliance market, hair stylers such as hair dryers and curling irons have become indispensable tools in daily life. To meet diverse user needs, these products require different levels of adjustment for wind speed and temperature, requiring multiple buttons. However, these numerous buttons make single-handed operation nearly impossible, impacting the user experience.

[0003] Therefore, it is necessary to improve the button structure of the stylist to enhance the fluency and accuracy of human-computer interaction and provide users with a better user experience. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a hair styling tool for at least solving the technical problem of inconvenient operation of the button design of the traditional styling tool in the prior art.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] The present application provides a hair styling tool, the hair styling tool comprising a main structure, the main structure comprising a handle portion and an annular adapter cover;

[0007] The handle portion includes a shell, the shell adopts a cylindrical structure and an air supply unit is provided inside the shell, and a first end of the shell forms a gradually expanding connection port;

[0008] The annular adapter cover is arranged on the connection port and cooperates with the outer shell to form an accommodating cavity, and a heating unit is provided in the accommodating cavity; wherein, the connection between the annular adapter cover and the outer shell protrudes outward along its radial direction to form an annular boss, and a button assembly is provided on the annular boss.

[0009] According to some embodiments of the present application, the accommodating cavity includes a first cavity and a second cavity arranged circumferentially around the first cavity, the heating unit and the air supply unit are arranged in the first cavity; the main structure further includes:

[0010] A PCBA board is disposed in the second cavity;

[0011] The first cavity and the second cavity are isolated from each other.

[0012] According to some embodiments of the present application, the main structure further includes: a bracket assembly for fixing the PCBA board and the heating unit;

[0013] The bracket assembly includes:

[0014] a first bracket plate, disposed in the accommodating cavity and used for mounting the heating unit;

[0015] The second bracket plate is arranged at the first end of the housing and is used to cooperate with the first bracket plate to fix the PCBA board between the first bracket plate and the second bracket plate.

[0016] According to some embodiments of the present application, the button assembly includes a button and a switch provided on the PCBA board corresponding to the button, the switch controls the working state of the hair styling tool, and the PCBA board is provided with an indicator light for displaying the working state of the hair styling tool.

[0017] The annular adapter cover is provided with a light-transmitting hole corresponding to the indicator light.

[0018] According to some embodiments of the present application, there are multiple indicator lights, and the first bracket plate includes a light through hole. The multiple light through holes are independent of each other and correspond one-to-one to the multiple indicator lights.

[0019] According to some embodiments of the present application, a decorative light is further provided on the PCBA board, the PCBA board is annular, and there are multiple decorative lights distributed in a ring shape on the PCBA board. A light-transmitting area is provided on the annular adapter cover, and the light of the decorative light can be transmitted through the light-transmitting area.

[0020] According to some embodiments of the present application, a first positioning column is provided on one of the second bracket plate and the PCBA board, and a first positioning hole is provided on the other one.

[0021] According to some embodiments of the present application, a limiting groove is provided on the first bracket plate, the first bracket plate is sleeved on the outer periphery of the heating unit, and the outer wall of the heating unit is provided with a protrusion that cooperates with the limiting groove.

[0022] According to some embodiments of the present application, the button assembly includes:

[0023] Wind speed adjustment button, used to switch between different wind speed levels;

[0024] Air temperature adjustment button, used to switch between different levels of air temperature;

[0025] Mode switch key, used to switch between different working modes;

[0026] The wind speed adjustment key, the wind temperature adjustment key and the mode switching key are all arranged on the annular adapter cover.

[0027] According to some embodiments of the present application, the wind speed adjustment key includes a first button, the wind temperature adjustment key includes a second button, and the mode switch key includes a third button. The first button, the second button, and the third button are integrally arranged to form a button module. The button module is fixedly connected to the annular adapter cover, and a second positioning column is provided on one of the button module and the annular adapter cover, and a second positioning hole is provided on the other.

[0028] According to some embodiments of the present application, the main structure further includes:

[0029] The outer ring connecting piece is sleeved on the outer peripheral side of the connection between the annular adapter cover and the outer shell.

[0030] According to some embodiments of the present application, a power switch is provided on the housing, and the power switch is used to control the start and stop of the hair styling iron. The power switch is located directly below the button assembly.

[0031] In the above technical solution, a hair styling tool is provided. By optimizing its main structure, an annular boss is formed on the circumference of one end of the hair styling tool, and a button assembly is integrated into the annular boss, thereby achieving an optimized arrangement of the button assembly, allowing the user to operate it with one hand, improving efficiency, and enhancing the smoothness of human-computer interaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 is a schematic diagram of the main structure of a hair styling tool according to an exemplary embodiment;

[0034] Figure 2 is a cross-sectional view of the main structure of a hair styling tool according to an exemplary embodiment;

[0035] Figure 3 is an exploded view of a portion of a hair styling tool according to an exemplary embodiment;

[0036] Figure 4 is a schematic diagram of the inner side of an annular adapter cover according to an exemplary embodiment;

[0037] Figure 5 is a schematic diagram of a first bracket plate according to an exemplary embodiment;

[0038] Figure 6is a schematic diagram showing the cooperation between the first bracket plate and the PCBA according to an exemplary embodiment;

[0039] The names of the components in the figure are as follows:

[0040] 10. Main structure;

[0041] 101. Handle part;

[0042] 1011. Housing; 10111. Connection port;

[0043] 1012, first bracket plate; 10121, limiting groove; 10122, rib; 10123, light through hole; 10124, third screw hole;

[0044] 1013, second bracket plate; 10131, first screw hole; 10132, second screw hole; 10133, cylinder (first positioning column); 10134, hook;

[0045] 102, annular adapter cover; 1021, adapter portion; 1022, keycap hole; 1023, light-transmitting hole; 1024, buckle; 1025, second positioning column;

[0046] 103. Button module; 1031. Wind speed adjustment button; 1032. Mode switch button; 1033. Wind temperature adjustment button; 1034. Second positioning hole;

[0047] 104. Air supply unit;

[0048] 105. Heating unit;

[0049] 106. Outer ring connector;

[0050] 107, PCBA board; 1071, trigger switch; 1072, indicator light; 1072A, wind speed indicator light; 1072B, mode indicator light; 1072C, wind temperature indicator light; 1073, first positioning hole; 1074, decorative light;

[0051] 108. Power switch. DETAILED DESCRIPTION

[0052] The present application will be further described in detail below through the accompanying drawings and examples, through which the features and advantages of the present application will become more clear and distinct.

[0053] The word "exemplary" is used exclusively herein to mean "serving as an example, example, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0054] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0055] Conventional stylers often suffer from button design drawbacks such as unclear function labels and overly compact or scattered button layouts, making one-handed operation inconvenient and impacting the user experience. Furthermore, the heating element in conventional stylers operates at high temperatures, and if it is too close to the PCBA, buttons, and corresponding housing, it can easily cause aging of these components.

[0056] The present application provides a hair styling tool. By optimizing its main structure, one end of the handle housing is designed as a gradually expanding connection port, which cooperates with the annular adapter cover to form a receiving cavity, thereby forming an receiving cavity with an annular boss. The button assembly is then integrated into the annular boss, thereby achieving an optimized arrangement of the button assembly, allowing users to operate it with one hand, improving efficiency, and enhancing the smoothness of human-computer interaction.

[0057] The technical solution of this embodiment is described in detail below with reference to the accompanying drawings. The following embodiments and implementation methods can be combined with each other unless there is any conflict.

[0058] In an exemplary embodiment of the present invention, a hair styling tool is provided. Figure 1 As shown, Figure 1 This is a schematic diagram of the main structure of a hair styling tool according to an exemplary embodiment. The hair styling tool comprises a main structure 10 and a styling attachment (not shown) detachably connected to the main structure 10. The styling attachment includes at least one of a nozzle, a curling iron, and a comb assembly. The main structure 10 includes a handle 101 and a ring-shaped adapter cover 102.

[0059] like Figure 1-Figure 2 As shown, the handle portion 101 includes a housing 1011 having a cylindrical structure and an air supply unit 104 disposed therein. A first end of the housing 1011 forms a gradually expanding connection port 10111. A power cord can be disposed at the second end of the housing 1011. Circuits for the air supply unit 104, the heating unit 105, and related electrical components can be connected to the power cord and drawn out from the second end.

[0060] like Figure 1-Figure 2As shown, the annular adapter cover 102 covers the connection port 10111 and cooperates with the shell 1011 to form a containing cavity. The containing cavity is provided with a heating unit 105. Since the shell 1011 is a cylindrical structure, most of the cavity structure of the containing cavity is formed by the shell 1011, at this time, the air supply unit 104 can be arranged on the upstream of the shell 1011 corresponding to the air inlet hole, that is, close to the side of the second end. In order to integrate the key assembly and avoid the influence of the high temperature of the heating unit 105 on the PCBA board 107 and other devices, the annular adapter cover 102 can be optimized in structure, that is, the connection part of the annular adapter cover 102 and the shell 1011 is outwardly protruded along the radial direction to form an annular boss, the key assembly is arranged on the annular boss, and the middle region of the annular adapter cover 102 is protruded to the side away from the shell 1011 to form an adapter 1021, which is used to connect the modeling accessory.

[0061] In the present exemplary embodiment, the key assembly of the hair styling device (such as a hair dryer, a curling iron, etc.) is arranged on the annular boss formed by the cooperation of the shell 1011 and the annular adapter cover 102, and the annular boss is expanded outwardly along the radial direction to form a structure similar to a flying saucer. Based on the integration of the key assembly on the annular boss, when the user holds the shell 1011 of the handle 101, the user can control the key assembly by the index finger or the thumb of one hand to switch the function gears such as wind speed, wind temperature and mode. Based on the hair styling device, the user can operate by one hand, which greatly improves the operation efficiency and enhances the smoothness of human-computer interaction.

[0062] In addition, since the handle 101 is provided with the fan unit and the heating unit 105, the heating unit 105 is located downstream of the air supply unit 104 and corresponds to the annular boss, at this time, the annular adapter cover 102 can be made of temperature-resistant material, and the shell 1011 can also be made of temperature-resistant material without considering the cost. In the present embodiment, the annular boss formed by the cooperation of the shell 1011 and the annular adapter cover 102 can increase the heat dissipation space, reduce the internal loss of the machine, improve the service life of the hair styling device, and also avoid the direct transmission of heat to the user's hand through the handle, thereby improving the comfort of the user.

[0063] It should be noted that, in addition to the above-mentioned annular boss formed by the cooperation of the annular adapter cover 102 and the shell 1011, the connection port 10111 can also be separated from the shell 1011, that is, the annular boss is formed by the cooperation of the upper cover and the lower cover, and the lower cover is detachably connected with the shell 1011. At this time, the upper cover is the annular adapter cover 102, and the lower cover corresponds to the connection port 10111 part. After the corresponding devices are assembled in the inside of the annular boss, the lower cover is connected with the shell 1011, and at this time, the containing cavity is formed by the cooperation of the annular adapter cover 102, the lower cover and the shell 1011.

[0064] In some exemplary embodiments, Figure 2-Figure 3 As shown, in this exemplary embodiment, the main structure 10 also includes a PCBA board 107 and a bracket assembly. The PCBA board 107 is arranged in the accommodating cavity. The bracket assembly is used to fix the PCBA board 107 and the heating unit 105. Furthermore, the accommodating cavity includes a first cavity and a second cavity arranged circumferentially around the first cavity. The heating unit 105 and the air supply unit 104 are arranged in the first cavity, and the PCBA board is arranged in the second cavity. The first cavity and the second cavity are isolated. An air flow inlet connected to the first cavity is provided on the housing 1011. The external air flow enters the interior of the first cavity from the air flow inlet and flows through the fan unit 104 and the heating unit 105 in sequence. Since the first cavity and the second cavity are isolated, the air flow in the first cavity will not enter the second cavity, thereby avoiding the influence of the hot air flow and the heat radiation of the heating unit on the working performance of the PCBA board 107.

[0065] In this embodiment, in order to minimize the size of the main structure 10, the PCBA board 107 can also be made into an annular plate structure and mounted on the outer peripheral side of the heating unit 105. Since the PCBA board 107 is located at the position of the annular boss, there is sufficient installation space to assemble it.

[0066] To ensure the stability of the various components within the installation cavity, multiple bracket plates can be provided to cooperate with each other to secure components such as the PCBA board 107 and the heating unit 105. Optionally, the bracket assembly includes a first bracket plate 1012 and a second bracket plate 1013. The first bracket plate 1012 is disposed within the accommodating cavity and is used to mount the heating unit 105. The second bracket plate 1013 is disposed at the first end of the housing 1011, and the second bracket plate 1013 cooperates with the first bracket plate 1012 to secure the PCBA board 107 between the first bracket plate 1012 and the second bracket plate 1013. Furthermore, two first positioning columns 10133 are provided on the second bracket plate 1013, and corresponding first positioning holes 1073 are provided on the PCBA board 107 to improve assembly efficiency.

[0067] In some exemplary embodiments, Figure 2-Figure 3 As shown, in this exemplary embodiment, to protect the connection between the annular adapter cover 102 and the outer shell 1011, an appearance protection member can be added at the corresponding position. For example, the main structure 10 also includes an outer ring connector 106. The outer ring connector 106 is mounted on the outer circumference of the connection between the annular adapter cover 102 and the outer shell 1011 to protect the outer shell 1011 and the annular adapter cover 102.

[0068] In some exemplary embodiments, Figure 1 、 Figure 3-Figure 4 As shown, Figure 2This is a cross-sectional view of the main structure according to an exemplary embodiment. For example, a hair styling tool, such as a hair dryer, may be equipped with a wind speed adjustment key, a wind temperature adjustment key, and a mode switch key. Exemplarily, the button assembly includes: a wind speed adjustment key for switching between different wind speed levels; a wind temperature adjustment key for switching between different wind temperature levels; and a mode switch key for switching between different operating modes. Furthermore, the button assembly includes a button and a trigger switch 1071 provided on a PCBA board 107 corresponding to the aforementioned button. Trigger switch 1071 controls the operating state of the hair styling tool. The wind speed adjustment key includes a wind speed adjustment button 1031 and a trigger switch 1071 that cooperates with the wind speed adjustment button 1031. The wind temperature adjustment key includes a wind temperature adjustment button 1033 and a trigger switch 1071 that cooperates with the wind temperature adjustment button 1033. The mode switching key includes a mode switching button 1032 and a trigger switch 1071 that cooperates with the mode switching button 1032. The wind speed adjustment button 1031, the wind temperature adjustment button 1033, and the mode switching button 1032 are integrally arranged to form a button module 103. The button module 103 is fixedly connected to the annular adapter cover 102, and one of the button module 103 and the annular adapter cover 102 is provided with a positioning post, and the other is provided with a positioning hole. More specifically, the button module 103 is provided with a second positioning hole 1034, and the annular adapter cover 102 is provided with a second positioning post 1025 that cooperates with the second positioning hole 1034.

[0069] To facilitate one-handed operation with the index finger or thumb, the wind speed adjustment button 1031, wind temperature adjustment button 1033, and mode switch button 1032 are optionally located on the circular adapter cover 102. In this embodiment, the buttons are positioned and installed using the first bracket plate 1012 and the keycap holes 1022 on the circular adapter cover 102. The button layout is based on the user's natural hand shape when holding the hair dryer, and the optimal button position was determined through ergonomic analysis. The hair dryer's on / off switch is placed below the saucer portion, allowing the user to easily access the switch without changing their grip during use, enhancing the convenience of one-handed operation.

[0070] In some exemplary embodiments, Figure 3 As shown, given the hair styling tool's lack of an intuitive indicator system, it's difficult for users to quickly identify the current operating status, reducing the user experience. In this exemplary embodiment, an indicator light 1072 can also be provided on the PCBA board 107. This indicator light is used to display the wind speed level, wind temperature level, and operating mode. Accordingly, to facilitate user observation, a light-transmitting hole 1023 corresponding to the indicator light is provided on the annular adapter cover 102. Exemplarily, the indicator light is an LED indicator light 1072. By adding this indicator light, users can more intuitively identify the current mode and level.

[0071] Further optionally, as Figure 6As shown, multiple indicator lights can be provided to distinguish the wind speed level, wind temperature level, and mode level, making it easier for the user to intuitively distinguish. The indicator lights include: multiple wind speed indicator lights 1072A for displaying different levels of wind speed levels; multiple wind temperature indicator lights 1072C for displaying different levels of wind temperature levels; and multiple mode indicator lights 1072B for displaying different operating modes. For example, three wind speed indicator lights correspond to the wind speed adjustment key, three wind temperature indicator lights correspond to the wind temperature adjustment key, and three mode indicator lights correspond to the mode switch key.

[0072] Optionally, when a button assembly is provided on the annular adapter cover 102, as shown in FIG. Figure 3-Figure 4 As shown, the left-hand speed adjustment button 1031 can adjust the wind speed to low, medium, and high; the middle mode switch button 1032 switches between cold, hot, and hot-cold cycle modes; and the right-hand temperature adjustment button 1033 can adjust the wind temperature to low, medium, and high. It should be noted that corresponding indicator lights can also be labeled with text to help users better understand the functions of each button and the gear position indicator. This hair styling iron adopts a novel button structure. By arranging the button components on the top of the hair styling iron (i.e., on the ring-shaped adapter cover 102) and using a circular arrangement of buttons, it controls functions such as wind temperature, mode, and wind speed. This allows for easy one-handed operation and quick function switching. The current operating status is displayed via an LED indicator 1072, enhancing the overall user experience and satisfaction.

[0073] In some exemplary embodiments, Figure 1 As shown, the power switch 108 can be located at a corresponding position on the housing 1011 to distinguish it from the aforementioned button assembly. The power switch 108 is used to control the start and stop of the hair styling device. To further facilitate one-handed operation, the power switch 108 is located directly below the button assembly. In this example, the button assembly includes three buttons, with the power switch 108 located at the bottom of the middle button. If the button assembly includes two buttons, the power switch 108 is located directly below the center of the two buttons. The minimum distance between the power switch 108 and the button assembly is d, with a value of 20 mm ≤ d ≤ 60 mm, making one-handed operation convenient. When d > 60 mm, the power switch is too far from the button assembly, making one-handed operation difficult. When d < 20 mm, the power switch is too close to the button assembly, also making one-handed operation difficult. In one example, the user can use their thumb to operate the power switch and their index finger on the saucer to operate the wind speed adjustment button 1031, wind temperature adjustment button 1033, and the center mode switch button 1032, achieving one-handed control of the hair dryer.

[0074] To enhance the product's technological appeal, decorative lights 1074 can be further installed on the annular PCBA board 107. Multiple decorative lights 1074 are distributed in a circular pattern on the board 107. These decorative lights 1074 can coordinate with the operation of the power switch 108. The annular adapter cover 102 has a light-transmitting area, through which the light from the decorative lights 1074 can be transmitted.

[0075] The following describes the assembly and use of the hair styling tool in conjunction with the above embodiment of the present application.

[0076] like Figures 1-6 As shown, the inner wall of the circular adapter cover 102 is provided with a second positioning post 1025, and each button is provided with a second positioning hole 1034 that cooperates with the second positioning post 1025, thereby fixing each button to the circular adapter cover 102. The circular adapter cover 102 is provided with a keycap hole 1022 for installing the button. The circular adapter cover 102 is provided with a light-transmitting hole 1023 at the position corresponding to the LED indicator 1072, ensuring that the user can clearly see the status of the indicator during use. The trigger switch 1071 and indicator light 1072 corresponding to each button are manufactured by soldering and assembling the corresponding components on a PCB board, resulting in the corresponding PCBA board 107.

[0077] There are multiple light holes 1023. The first bracket plate 1012 includes a light through hole 10123. The multiple light through holes 10123 are independent of each other and correspond one-to-one with the multiple indicator lights 1072. This ensures that the light from the indicator lights 1072 can pass through the corresponding light through holes 1023 on the annular adapter cover 102, preventing light from crossing. Furthermore, the first bracket plate 1012 also includes multiple retaining ribs that define the light through holes 10123 and ribs 10122 that connect the multiple retaining ribs, improving structural strength and further preventing light from crossing.

[0078] like Figure 1-Figure 5 As shown, more specifically, the second bracket plate 1013 is provided with a first screw hole 10131 and a second screw hole 10132, and the first bracket plate 1012 is provided with a third screw hole 10124. The first screw hole 10131 and the third screw hole 10124 cooperate with a connector (such as a screw, rivet, etc.) to securely connect the first bracket plate 1012 and the second bracket plate 1013, thereby firmly securing the PCBA board 107 between the first bracket plate 1012 and the second bracket plate 1013. The second screw hole 10132 cooperates with other structures of the handle portion 101 to securely connect the second bracket plate 1013 to the handle portion 101. The annular adapter cover 102 is provided with a buckle 1024, which is detachably connected to the hook 10134 on the second bracket plate 1013.

[0079] A limiting groove 10121 is provided on the first bracket plate 1012 to fix and limit the heating unit 105. The first bracket plate 1012 is sleeved on the outer periphery of the heating unit 105. The outer wall of the heating unit 105 is provided with a protrusion that cooperates with the limiting groove 10121, thereby improving assembly efficiency and ensuring reliable fixation of the two.

[0080] When using the hair styler, the user simply selects the appropriate styling attachment, turns on the power switch 108, and selects the desired wind speed, wind temperature, and operating mode. Because the button assembly is arranged on the top of the styler in a flying saucer design, the size, shape, and spacing of the buttons are carefully designed to ensure easy access and pressing during use, reducing hand fatigue and optimizing the smoothness and efficiency of human-computer interaction. This improves the overall aesthetics of the hair styler while also enhancing the user experience.

[0081] The hair styling tool of the present application may be of a columnar structure or of a T-shaped structure with a head and a handle.

[0082] In the description of this application, it should be noted that the terms "upper", "lower", "inside", "outside", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships in the working state of this application. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on this application.

[0083] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0084] The present application has been described above in conjunction with preferred embodiments, but these embodiments are merely exemplary and serve only as an illustrative example. On this basis, various replacements and improvements can be made to the present application, all of which fall within the scope of protection of the present application.

Claims

1. A hair styling tool, characterized in that: The hair styling tool comprises a main structure, which includes a handle portion and an annular adapter cover; The handle portion includes a shell, the shell adopts a cylindrical structure and an air supply unit is provided inside the shell, and a first end of the shell forms a gradually expanding connection port; The annular adapter cover is arranged on the connection port and cooperates with the outer shell to form an accommodating cavity, and a heating unit is provided in the accommodating cavity; wherein, the connection between the annular adapter cover and the outer shell protrudes outward along its radial direction to form an annular boss, and a button assembly is provided on the annular boss.

2. The hair styling tool according to claim 1, characterized in that The accommodating cavity includes a first cavity and a second cavity arranged around the circumference of the first cavity, and the heating unit and the air supply unit are arranged in the first cavity; The main structure also includes: A PCBA board is disposed in the second cavity; The first cavity and the second cavity are isolated from each other.

3. The hair styling tool according to claim 2, characterized in that The main structure further includes: a bracket assembly for fixing the PCBA board and the heating unit; The bracket assembly includes: a first bracket plate, disposed in the accommodating cavity and used for mounting the heating unit; The second bracket plate is arranged at the first end of the housing and is used to cooperate with the first bracket plate to fix the PCBA board between the first bracket plate and the second bracket plate.

4. The hair styling tool according to claim 3, characterized in that The button assembly includes a button and a switch provided on the PCBA board corresponding to the button. The switch controls the working state of the hair styling tool. The PCBA board is provided with an indicator light for displaying the working state of the hair styling tool. The annular adapter cover is provided with a light-transmitting hole corresponding to the indicator light.

5. The hair styling tool according to claim 4, characterized in that: There are multiple indicator lights, and the first bracket plate includes light holes. The multiple light holes are independent of each other and correspond one-to-one to the multiple indicator lights.

6. The hair styling tool according to claim 4, characterized in that The PCBA board is also provided with a decorative light. The PCBA board is annular. There are multiple decorative lights distributed in an annular shape on the PCBA board. A light-transmitting area is provided on the annular adapter cover, and the light of the decorative light can be transmitted through the light-transmitting area.

7. The hair styling tool according to claim 3, characterized in that One of the second bracket plate and the PCBA plate is provided with a first positioning column, and the other is provided with a first positioning hole.

8. The hair styling tool according to claim 3, characterized in that A limiting groove is provided on the first bracket plate. The first bracket plate is sleeved on the outer periphery of the heating unit. A protrusion that cooperates with the limiting groove is provided on the outer wall of the heating unit.

9. The hair styling tool according to claim 1, wherein: The button assembly includes: Wind speed adjustment button, used to switch between different wind speed levels; Air temperature adjustment button, used to switch between different levels of air temperature; Mode switch key, used to switch between different working modes; The wind speed adjustment key, the wind temperature adjustment key and the mode switching key are all arranged on the annular adapter cover.

10. The hair styling tool according to claim 9, characterized in that The wind speed adjustment key includes a first button, the wind temperature adjustment key includes a second button, and the mode switch key includes a third button. The first button, the second button, and the third button are integrally arranged to form a button module. The button module is fixedly connected to the annular adapter cover, and a second positioning column is provided on one of the button module and the annular adapter cover, and a second positioning hole is provided on the other.

11. The hair styling tool according to any one of claims 1 to 10, characterized in that: The main structure also includes: The outer ring connecting piece is sleeved on the outer peripheral side of the connection between the annular adapter cover and the outer shell.

12. The hair styling tool according to any one of claims 1 to 10, characterized in that: The housing is provided with a power switch, which is used to control the start and stop of the hair styling tool. The power switch is located directly below the button assembly.

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