A photothermal hair drying device

Abstract

The application relates to a photo-thermal hair-drying device which comprises a body and a handle connected with each other; the body is internally provided with a containing cavity, the body is provided with an air inlet and an air outlet in airflow communication with the containing cavity, a first control circuit board and a motor electrically connected with the first control circuit board are arranged in the containing cavity; the photo-thermal hair-drying device further comprises a light source assembly which is arranged at the air outlet of the body, the light source assembly comprises a light source lamp tube and a filter element with a predetermined wave band or wavelength; the filter element is arranged in the following mode: the tube wall of the light source lamp tube is made of color glass to obtain a color glass lamp tube, and / or a filter is arranged outside the light source lamp tube, and / or the inner wall and / or the outer wall of the light source lamp tube is coated with a filter film; the light emitted by the light source is filtered by the filter element and has the corresponding predetermined wave band or wavelength; the light with the predetermined wave band or wavelength directly irradiates the hair and the scalp, the thermal energy of the light wave heats the hair for drying the hair and the hair is not easy to be burnt, and the hair and the scalp are subjected to physiotherapy.

Description

Technical Field

[0001] This application relates to the field of hair care, and in particular to a photothermal hair drying device. Background Technology

[0002] Hair dryers are common household appliances, primarily used for drying and styling hair. They can also be used in laboratories, physiotherapy rooms, industrial production, and art for localized drying, heating, and therapeutic purposes, making their applications very wide. The main components of current hair dryers are largely similar, including a fan, air duct, and heating element, arranged sequentially within the main body. They also include an interactive interface (such as buttons) located inside the handle. The power cord connects to the fan, and the buttons control the fan's on / off operation. Existing hair dryers generally only have the function of heating and drying hair and do not offer hair or scalp care functions. Some hair dryers are equipped with ultraviolet light sources for disinfection. Chinese Patent No. CN202280001737.8 discloses a drying device with multiple radiation sources that simultaneously dries the target object through airflow and infrared radiation. When the target object absorbs infrared radiation and heats up, it is dissipated by the airflow, avoiding the danger of high temperatures caused by rapid heating. Existing hair dryers or hair drying devices have limited functionality and cannot achieve simultaneous hair and scalp care while drying hair. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a photothermal hair drying device that solves the problem that existing hair drying devices have limited functions and cannot effectively care for hair and scalp.

[0004] To solve the above-mentioned technical problems, this application adopts the following technical solution: A photothermal hair drying device includes a body and a handle, which are connected to each other. The body has an interior cavity with an air inlet and an air outlet communicating with the airflow within the cavity. A first control circuit board and a motor electrically connected to the first control circuit board are installed in the cavity. The photothermal hair drying device also includes a light source assembly installed at the air outlet of the body. The light source assembly includes a light source tube and a filter element having a predetermined wavelength or band. The filter element is configured such that the tube wall of the light source tube is made of colored glass to obtain a colored glass tube, and / or a filter is provided on the outside of the light source tube, and / or a filter film is coated on the inner and / or outer walls of the light source tube. The light emitted by the light source has a corresponding predetermined wavelength or band after being filtered by the filter element. The light of the predetermined wavelength or band directly irradiates the hair or scalp, and the heat energy of the light waves heats the hair for drying without easily burning it, while simultaneously providing therapeutic treatment to the hair or scalp.

[0005] Preferably, the predetermined band or wavelength is 400–2300 nm.

[0006] In some embodiments, the light source is one of halogen lamp, carbon filament lamp, tungsten filament lamp, and incandescent lamp; the filter element is a single-band, single-wavelength, multi-band, or multi-wavelength filter element.

[0007] In some embodiments, the colored glass is made by adding colorants to the raw materials of optical glass, and adjusting the type and amount of colorants according to the principle of controlling the light band by the color of the optical glass material to obtain the filtering function of a predetermined band or wavelength.

[0008] In some embodiments, the steps of preparing a colored glass lamp tube include: Ingredients: A trace amount of colorant is added to the basic optical glass raw material; Melting: The ingredients are melted in a high-temperature furnace, and the colorant is uniformly dispersed in the glass melt in the form of ions or molecules; Molding and annealing: The glass melt is blown, die-cast, or drawn into shape, and then slowly cooled and annealed to obtain colored glass lamp tubes.

[0009] In some embodiments, the emitted light from the light source having the colored glass lamp tube is: It has a predetermined optical band or wavelength of red light, with a band or wavelength range of 620~750nm; or, It has a predetermined optical band or wavelength of near-infrared light, with a band or wavelength range of 750~2400nm; or, It has a predetermined optical band or wavelength of blue light, with a band or wavelength range of 400-495nm; or, It has a predetermined optical band or wavelength of yellow light, with a band or wavelength range of 580-620nm; or, It has a predetermined optical band or wavelength of red light + near-infrared light, with a band or wavelength range of 620~750nm + 750~2400nm.

[0010] In some embodiments, the predetermined optical band of the filter element is a single band or single wavelength or multiple optical bands or multiple wavelengths in the near-infrared band of 900-2500nm, 900-1800nm, 380-450nm, or 600-750nm.

[0011] In some embodiments, the housing is a hollow elongated cylinder with a front opening serving as an air outlet for blowing air outwards; the light source tube is disposed on the inner wall of the front opening of the housing, and its shape is adapted to the shape of the front opening so as not to obstruct the air outlet from blowing air outwards; the emitted light from the light source is filtered by the filter element and then illuminates the hair or scalp.

[0012] In some embodiments, a protrusion is provided on the inner wall of the front end of the hollow elongated cylinder to securely mount the light source tube; the housing includes an inner cylinder and an outer cylinder, the outer cylinder is fitted outside the inner cylinder, and the front end of the outer cylinder is longer than the inner cylinder; the inner cylinder fits against the inner wall of the outer cylinder and its front edge forms an annular flange on the inner wall of the outer cylinder; the protrusion is provided on the inner wall of the front end of the outer cylinder; the annular flange and the protrusion securely fix the light source tube; the light source assembly also includes a light-transmitting cover plate, the shape of which is adapted to the light source tube and fits to cover the outside of the light source tube, and the emitted light from the light source shines on the hair or scalp after being emitted through the light-transmitting cover plate; the shape of the light-transmitting cover plate is adapted to the shape of the front opening and is tensioned and / or secured to the inner wall of the front end of the outer cylinder.

[0013] In some embodiments, the filter is disposed outside the light source tube, and its shape is adapted to the light source tube; the filter is disposed between the light source tube and the light-transmitting cover plate; the light source tube is annular or arc-shaped, and the protrusion is arc-shaped; The filter is annular; the light-transmitting cover is annular; the light source tube is clamped between the annular flange and the protrusion after being secured by several tube brackets; the tube brackets are elastic clips; the light-transmitting cover presses the filter and the light source tube together.

[0014] In some embodiments, the photothermal hair drying device is equipped with multiple filters for switching use, each filter having a different light band; the front end of the hollow cylindrical part of the housing is provided with an insertion port, and filters of different light bands are selected and switched by inserting and removing them from the insertion port; or, the filters and the light-transmitting cover are detachably installed at the air outlet of the housing, and different filters are switched by removing the filters and the light-transmitting cover.

[0015] In some embodiments, the housing protrudes outwardly with a rotary bearing seat, and the top of the handle forms a rotary fitting portion. The rotary fitting portion on the top of the handle is rotatably connected to the rotary bearing seat, thereby allowing the housing and the handle to rotate relative to each other by a predetermined angle to adjust the angle of the air outlet. The rotary bearing seat has a through-hole formed at its center along the axial direction. A connecting shaft is inserted into the shaft hole, and its two ends are connected to the rotary fitting portion on the top of the handle, thereby rotatably connecting the handle and the housing. The rotary bearing seat includes an annular rotating shaft and an outer ring. The annular rotating shaft is fitted inside the outer ring and can rotate relative to each other with a limited position. The annular rotating shaft is locked and connected to the rotary fitting portion on the top of the handle. The housing and the handle rotate relative to each other through the rotational engagement of the annular rotating shaft.

[0016] In some embodiments, the rotary shaft seat has an internal cavity that communicates with the internal cavity of the handle and the internal cavity of the body for the placement of electronic components or circuits; the annular rotating shaft is rotatably fitted within the outer ring with multiple limit positions; the body housing includes a first housing and a second housing connected to each other, the first housing protruding outward with a first circular seat, and the second housing protruding outward with a second circular seat; the first housing and the second housing are connected to form an inner cylinder, and the body housing may also have an outer cylinder fitted over the inner cylinder; the first circular seat and the second circular seat are shaped and interlocked, the first circular seat being an integral fixed structure of the first housing or mutually fixedly connected, and the second circular seat being an integral fixed structure of the second housing or mutually fixedly connected; the rotary shaft seat includes mutually interlocked, shaped, and centrally formed... The shaft hole comprises a first circular seat, a second circular seat, a first outer circular bracket, a second outer circular bracket, an annular rotating shaft, and an outer ring; the first outer circular bracket is adapted to be fastened to the outer annular wall of the first circular seat and is relatively fixedly connected, and the outer ring is adapted to be sleeved inside the annular wall of the first circular seat and is relatively fixedly connected; the first outer circular bracket is provided with a protruding connecting portion, which is clamped to the body housing to fix the first outer circular bracket to the body; the second outer circular bracket is adapted to be fastened to the outer side of the second circular seat and is relatively fixedly connected, and the second outer circular bracket is provided with a protruding connecting portion, which is clamped to the body housing to fix the second outer circular bracket to the body; the first outer circular bracket and the second outer circular bracket are respectively adapted to be rotatably fitted with the rotary fitting portion of the handle housing.

[0017] In some embodiments, the first housing, the second housing, and the outer cylinder are provided with slots from the position of the rotary shaft seat to one end of the air inlet, forming a through-long slot after assembly. A connecting cover covers the long slot and is clamped to the first housing, the second housing, and the outer cylinder. The annular rotating shaft is provided with a protrusion. The handle housing includes a third housing and a fourth housing that interlock, with an internal cavity. The top of the third housing and the fourth housing are provided with rotary fitting parts, which are rotatably connected to the rotary shaft seat that protrudes outward from the body. The rotary fitting part at the top of the third housing is provided with a protruding connecting shaft, and the end of the connecting shaft is provided with a screw hole. The rotary fitting part at the top of the third housing is adapted to... The cover fits onto the outside of the second outer circular bracket of the rotary shaft seat and can rotate relative to it. The connecting shaft is inserted into the shaft hole of the rotary shaft seat and connected to the rotary mating part of the fourth housing. It is tightened and fixed by screws passing through the screw holes on the fourth housing and screwing into the screw holes at the end of the connecting shaft. The rotary mating part of the fourth housing fits onto the outside of the first outer circular bracket of the rotary shaft seat and can rotate relative to it. The rotary mating part of the fourth housing is connected to the annular rotating shaft. A groove is formed in the rotary mating part of the fourth housing. The groove is adapted to fit and lock into the protrusion of the annular rotating shaft, so that the annular rotating shaft and the rotary mating part of the fourth housing are connected together and rotate together.

[0018] In some embodiments, a groove / protrusion limiting fit is formed between the annular outer wall of the annular rotating shaft and the annular inner wall of the outer ring.

[0019] In some embodiments, a heating element electrically connected to the first control circuit board is further installed in the internal cavity of the body; a second control circuit board is installed in the internal cavity of the handle; the second control circuit board is electrically connected to the first control circuit board and is used for power management; the body or handle is provided with a button assembly, which is electrically connected to the first or second control circuit board; a negative ion assembly is installed in the internal cavity of the body or the internal cavity of the handle; the negative ion assembly is electrically connected to the first or second control circuit board; one end of the power cord is electrically connected to the second control circuit board, and the other end extends outward from the tail of the handle to connect to a power source.

[0020] The beneficial effects of this application are: The photothermal hair drying device of this application uses light emitted from a light source to irradiate the hair and scalp. The heat from the light waves heats the hair, accelerating the drying process and preventing burns. At the same time, the emitted light waves are filtered to obtain a predetermined band or wavelength, thus providing therapeutic effects on the hair and scalp.

[0021] Furthermore, in the photothermal hair drying device of this application, the body and handle are rotatably connected by a rotary fitting part at the top of the handle and a rotary shaft seat provided on the body. The annular rotating shaft is rotatably fitted inside the outer ring of the rotating shaft with multiple limit positions, which can stably adjust the angle of the body, and the body and handle have stable and reliable support and positioning. Attached Figure Description

[0022] Figure 1-2 This is a perspective view of the photothermal hair drying device according to an embodiment of this application.

[0023] Figure 3-6 This is a perspective view of the photothermal hair drying device according to an embodiment of this application.

[0024] Figure 7 Figure (a) is a cross-sectional view of Figure (b) along line AA, and Figure (b) is a bottom view of the photothermal hair drying device according to an embodiment of this application. Detailed Implementation

[0025] The terms “first,” “second,” “top,” “bottom,” “upper,” and “lower” used in this application are not intended to limit the technical solution of this application, but are only used to distinguish and describe the various components.

[0026] This application relates to a photothermal hair drying device 100, including a body 10 and a handle 20. The body 10 and handle 20 are rotatably connected, or they can be fixedly connected. The body cavity forms an air duct, with through holes at the front and rear ends. The front end forms an air outlet to blow out hot air for drying hair, and the rear end forms an air inlet to draw in cold air. A first control circuit board 6, a motor 5, and a heating element 7 electrically connected to the first control circuit board 6 are installed inside the body cavity. A second control circuit board 24, a negative ion assembly 26, and a button assembly 25 are installed inside the handle cavity. The first control circuit board 6 and the second control circuit board 24 are electrically connected. The first control circuit board 6 serves as the main control board, and its functions include controlling and driving the motor 5, controlling the operation of the heating element 7, controlling the negative ion assembly 26, and coordinating with the second control circuit board 24. The second control circuit board 24 is a power supply PCBA, and its main functions are power management and energy management. The second control circuit board 24 is electrically connected to a power cord 29 to connect to an external power source (such as AC mains power). A battery, such as a primary battery, rechargeable battery, or capacitor battery, can be installed inside the handle 20. The battery is electrically connected to the second control circuit board 24 and can be directly installed on the second control circuit board 24. The button assembly 25 can be electrically connected to the first control circuit board 6 or the second control circuit board 24. The button assembly 25 can be located on the handle 20 or on the body 10.

[0027] The body is cylindrical, and a rotary bearing 11 is provided on the body 10 protruding outward (e.g., perpendicular to the length direction of the body). A rotary fitting part is formed on the top of the handle 20, and the rotary fitting part on the top of the handle is rotatably connected to the rotary bearing 11, so that the body (length direction) and the handle can rotate relative to each other by a predetermined angle to adjust the angle of the air outlet.

[0028] The casing is a hollow elongated cylinder. A rotary bearing 11 is positioned vertically outward from the center of the casing (not limited to the center position) (it can be at other angles as well). The rotary bearing 11 is a rotating body (e.g., a frustum of a cone), with a through-hole 110 along its central axis and an internal cavity 111. The cavity 111 communicates with the internal cavity of the handle and the internal cavity of the casing, serving to house electronic components or circuitry, and also to facilitate the interaction between the negative ion assembly 26 and the air in the internal air duct of the casing. The casing includes a first casing 3 and a second casing 8 connected to each other. Casings 3 and 8 can be semi-circular elongated cylinders. A first circular seat 14 protrudes outward from the center of the first casing 3, and a second circular seat 13 protrudes outward from the center of the second casing 8. The casing may also include an outer cylinder 19, fitted onto the outermost part of the casing. In this case, the first casing 3 and the second casing 8 are connected to form an inner cylinder 38, and the outer cylinder 19 is fitted over the inner cylinder 38. The first housing 3, the second housing 8, and the outer cylinder 19 are all provided with slots from the position of the rotary bearing 11 to one end of the air inlet. After assembly, they form a through long slot. The connecting cover 2 covers the long slot and is clamped to the first housing 3, the second housing 8, and the outer cylinder 19 to facilitate the installation of the rotary bearing 11 components and the assembly of the machine body components.

[0029] The rotary bearing 11 includes a first circular seat 14 and a second circular seat 13 that are interlocked and inserted into each other. It may also include a first outer circular bracket 18 and a second outer circular bracket 12, an annular rotating shaft 16, and a rotating shaft outer ring 15. These components have a shaft hole defined in their center and together form a shaft hole 110 that runs along the central axis after assembly. The first circular seat 14 and the second circular seat 13 are shaped to fit together and can be fastened together by fasteners such as screws 17. The first circular seat 14 may be an integral fixed structure of the first housing 3 or be fixedly connected to each other. The second circular seat 13 may be an integral fixed structure of the second housing 8 or be fixedly connected to each other. The first outer circular bracket 18 is adapted to be interlocked with the annular wall of the first circular seat 14 and is fixedly connected to it. The rotating shaft outer ring 15 is adapted to be fitted inside the annular wall of the first circular seat 14 and is fixedly connected to it. The annular rotating shaft 16 is fitted inside the rotating shaft outer ring 15 with multiple limited rotation. The annular shaft 16 is provided with T-shaped protrusions 160. Two T-shaped protrusions 160 can be provided symmetrically arranged along the circumference of the annular shaft 16. These include an arc-shaped protrusion located at the outer circumference of the annular shaft 16 and adapted to the curvature of the circumference of the annular shaft 16, and may also include a straight protrusion set along the height of the inner wall of the annular shaft 16. The top of the first outer circular bracket 18 (with a protruding connecting portion along the diameter direction) is fastened to the body housing in a long slot. The second outer circular bracket 12 is fastened to the outside of the second circular seat 13, and its top (with a protruding connecting portion along the diameter direction) is fastened to the body housing in a long slot. The first outer circular bracket 18 and the second outer circular bracket 12 are adapted to rotate relative to the rotary fitting portion of the handle housing.

[0030] An air inlet cover 1 is installed on the rear opening (air inlet) of the machine body. The air inlet cover 1 can be a round cover with air inlet holes. A dust filter 4 is installed inside the machine body cavity near the air inlet. The dust filter 4 can be round and can be rotated or fixedly installed inside the machine body. The motor 5 is installed in front of the dust filter 4 (on the side opposite to the air inlet cover 1 / air inlet) inside the machine body cavity. The dust filter 4 can be connected to the tail of the motor 5 (motor air inlet) and cover the motor air inlet. A silicone sleeve is fitted on the outer wall of the motor 5. The first control circuit board 6 is installed in front of the motor 5 inside the machine body cavity. An air duct is formed inside the motor, and a fan structure is installed on the motor shaft. When the motor starts, it can draw in cold air from the air inlet of the machine body and filter dust through the dust filter 4. The heating element 7 is installed in front of the first control circuit board 6 (on the side opposite to the motor 5) inside the machine body cavity. For example, the heating element 7 is a hollow cylinder with internal air ducts. Multiple fan-shaped (but not limited to) air ducts can be formed along its length. Air blown out by the motor 5 flows through the first control circuit board 6 (after removing heat) into the air ducts of the heating element 7 and is blown towards the air outlet of the unit. One end (air inlet) of the heating element 7 is close to the first control circuit board 6, and the other end (air outlet) is close to and directly opposite the front opening of the unit (air outlet). The heating element 7 can adopt a structure from existing technology. For example, multiple mica sheets are arranged inside the circular sleeve of the heating element 7, and heating wires are installed on the mica sheets. The mica sheets are arranged radially along the radial direction to form multiple air ducts arranged along the length direction. The heating element 7 can also adopt other electrothermal structures.

[0031] The light source assembly 30 is installed at the air outlet at the front of the unit. The shape of the light source assembly 30 is adapted to the shape of the opening at the front of the unit housing. The light source assembly 30 includes a light source tube 31, which emits light waves with a predetermined wavelength. When the light waves irradiate the hair or scalp, they generate heat that can be used to heat the hair, thereby achieving hair care, hair nourishment, hair growth, and scalp health. Examples of the corresponding effects of the emitted light waves of the light source tube are shown in Table 1 below.

[0032] The light source assembly 30 includes a light source tube 31 and an air outlet cover 33. The light source tube 31 can be configured as a ring-shaped (but not limited to) tube, and the air outlet cover 33 can also be configured as a ring-shaped light-transmitting cover. The light source tube 31 is installed on the front end of the housing by the air outlet cover 33, and the light emitted by the light source is transmitted through the light-transmitting cover to illuminate the hair or scalp. A connecting structure can be provided on the inner wall or end of the front end of the outer cylinder 19 of the housing, and the air outlet cover 33 is also provided with a matching connecting structure. The two connecting structures can be snap-fit ​​connections, protrusion / groove mating connections, tension connections, fastener connections, threaded connections, etc., so that the light source assembly 30 is fixedly or detachably installed in the front end opening of the outer cylinder. In one embodiment, the inner cylinder 38 is shorter than the outer cylinder 19 at the air outlet. The front end of the inner cylinder 38 forms an annular flange inside the outer cylinder 19, and several arc-shaped protrusions 190 are provided on the inner wall of the front end of the outer cylinder. The light source tube 31 is clamped between the front end of the inner cylinder 38 and the arc-shaped protrusions 190. The inner wall of the front end of the outer cylinder 19 and the annular outer wall of the air outlet cover 33 can be clamped and tensioned together by protrusions / grooves, thereby installing the light source assembly 30 in the opening (air outlet) at the front end of the body. The emitted light from the light source assembly 30 can directly illuminate the hair and scalp. To prevent the light source tube 31 from shaking, several tube brackets 34 are clamped to the outside of the light source tube, so that the light source tube is clamped between the front end of the inner cylinder 38 and the arc-shaped protrusions 190 and will not shake. The lamp holder 34 can be a flexible clip, such as a square (or other shape, preferably non-circular to avoid slippage) clip, with a slot formed on one side of the clip to secure the light source lamp tube 31.

[0033] The light source tube 31 can also be a straight tube, and multiple light source tubes 31 can span across the air outlet, with the light source tubes 31 spaced apart to form an air outlet duct. The air outlet cover 33 can be any applicable shape or structure, capable of installing the light source tubes at the front of the machine body, while allowing the emitted light from the light source to pass through and the high-speed airflow inside the machine body to blow through.

[0034] The light source tube 31 is preferably a halogen lamp, carbon filament lamp, tungsten filament lamp or incandescent lamp, etc.; in other embodiments, IPL light source tubes or LED lamps or other light sources may also be used.

[0035] As one embodiment, a filter 32 is also provided between the light source tube 31 and the air outlet cover 33. The shape of the filter 32 is adapted to the shape of the light source tube 31, for example, it is ring-shaped and covers the outside of the light source tube 31. The emitted light from the light source tube 31 is filtered by the filter 32 to obtain emitted light of a predetermined wavelength to irradiate the hair or scalp. The heat of its light energy can heat the hair to accelerate the drying of the hair, and at the same time achieve hair care, hair nourishment, hair growth and scalp health.

[0036] In another embodiment, the inner and / or outer walls of the light source tube 31 are coated with a filter film. The emitted light from the light source tube 31 is filtered by the filter film to obtain emitted light of a predetermined wavelength that irradiates the hair or scalp. The heat of the light energy can heat the hair to accelerate drying, while achieving hair care, hair nourishment, hair growth and scalp health.

[0037] In another embodiment, the tube wall of the light source tube 31 is made of colored glass to form a colored glass tube. The colored glass tube has a filtering function. The emitted light from the light source tube 31 is filtered by the colored glass tube wall to obtain emitted light of a predetermined wavelength that irradiates the hair or scalp. The heat of the light energy can heat the hair to accelerate the drying process, while achieving hair care, hair nourishment, hair growth and scalp health.

[0038] Preferably, the predetermined band or wavelength obtained after the emitted light from the light source tube 31 is filtered by the filter 32 / filter film / colored glass tube is 400-2300nm.

[0039] The handle 20 includes a handle housing and a second control circuit board 24 and a negative ion component 26 installed in a cavity inside the handle housing. A power cord 29 extends outward from the handle's tail cap 28. A button assembly 25 is provided on the handle 20, which is electrically connected to the second control circuit board 24 and fixed by the handle housing. The negative ion component 26 can be electrically connected to either the first control circuit board 6 or the second control circuit board 24. The negative ion component 26 can be installed in either the main body or the handle; in this embodiment, it is installed in the handle cavity. The negative ion component 26 can employ an existing structure, such as including a negative ion generator and an emitting needle. The negative ion generator acts on the gas in the air duct inside the main body through the emitting needle to form a high-speed negative ion airflow, resulting in better hair care.

[0040] The handle housing includes a third housing 21 and a fourth housing 22 that interlock. The third housing 21 and the fourth housing 22 can be connected by snap-fit, plugged into each other, or fixed by fasteners such as screws 17. The interior of the handle housing forms a handle cavity. The tops of the third housing 21 and the fourth housing 22 have rotary fitting parts that rotatably connect to a rotary bearing 11 protruding outwards from the body 10. The bottom of the handle is sealed and fixed by a tail cap 28. A connecting shaft 210 protrudes vertically from the center of the rotary fitting part at the top of the third housing 21, and a screw hole is provided at the end of the connecting shaft 210. The rotary fitting part at the top of the third housing 21 fits onto the outside of the second outer circular bracket 12 of the rotary bearing 11 and can rotate relative to it. The connecting shaft 210 is inserted into the shaft hole 110 of the rotary bearing 11 and connected to the center of the rotary fitting part of the fourth housing 22. It can be fixed by screws 17 passing through the screw hole on the fourth housing 22 and tightening it with the screw hole at the end of the connecting shaft 210. The rotary fitting part of the fourth housing 22 fits onto the outside of the first outer circular bracket 18 of the rotary shaft seat 11 and can rotate relative to it. Specifically, this is achieved through the relative rotation between the annular shaft 16 and the outer ring 15 of the shaft. The rotary fitting part of the fourth housing 22 is connected to the annular shaft 16. Specifically, a groove 220 is formed in the rotary fitting part of the fourth housing 22. The groove 220 fits onto the T-shaped protrusion 160 of the annular shaft 16. The T-shaped protrusion 160 and the groove 220 are locked together, thereby connecting the annular shaft 16 and the rotary fitting part of the fourth housing 22 together and allowing them to rotate together. The outer ring 15 of the shaft functions as a bearing, and it is fitted into the annular groove of the first circular seat 14 of the rotary shaft seat 11, where they are mutually tightened and locked together. A limiting protrusion 161 is provided on the outer annular wall of the annular rotating shaft 16, and a limiting groove 151 is provided on the inner annular wall of the rotating shaft outer ring 15. When the annular rotating shaft 16 rotates relative to the rotating shaft 15 within the rotating shaft outer ring 15, the limiting protrusion 161 and the limiting groove 151 cooperate to facilitate positioning when the body and handle rotate at a certain angle. The design of the limiting protrusion 161 requires a certain external force to be applied when the body 10 and handle 20 rotate relative to each other, and can be stably positioned when no angle adjustment is required. The first outer circular bracket 18 is finally fitted onto the outside of the first circular seat 14 and the rotating shaft outer ring 15.

[0041] The fourth housing 22 can be assembled by a snap-fit ​​of an inner housing 23 and an outer housing 27. The center of the rotary mating part on the top of the inner housing 23 is provided with a through hole so that the screw 17 can be inserted and tightened with the screw hole at the end of the connecting shaft 210 on the top of the third housing 21. The outer housing 27 and the rotary mating part on the top of the inner housing 23 together form a groove 220.

[0042] The working principle of this hair drying device is as follows: After the operation button assembly 25 is turned on, the high-speed motor 5 provides strong airflow, causing the airflow to enter the body through the dustproof mesh 4 from the rear air inlet (air hole of the air inlet cover 1). After being drawn into the air duct of the motor, it flows through the first control circuit board 6 (which can carry away the heat of the first control circuit board 6 and play a role in heat dissipation). At this time, the negative ion assembly 26 interacts with the air in the air duct to form a high-speed negative ion airflow. The airflow enters the air duct of the heating element 7 and is heated into hot air, which is blown onto the hair from the air outlet at the front of the body. The negative ion airflow blown onto the hair can prevent static electricity and make the hair smoother. At the same time, the light source assembly set at the air outlet at the front of the body is also turned on. The emitted light of the light source tube 31 is filtered by the filter 32 or the colored glass tube or the filter film on the tube wall of the light source tube to obtain the emitted light of the predetermined wavelength to irradiate the hair or scalp. The heat of the light energy plays a role in drying the hair, and at the same time achieves hair care, hair nourishment, hair growth and scalp health. The fan speed, heating element 7 power (heating temperature), and light source power can be adjusted by adjusting the speed of motor 5 via button assembly 25; motor 5, heating element 7, or light source tube 31 can also be turned on or off.

[0043] In addition to drying hair, the photothermal hair drying device of this application can also achieve functions such as hair care, hair nourishment, hair growth, or scalp health care.

[0044] In some embodiments, to achieve predetermined effects such as hair care, hair nourishment, hair growth, and scalp health, the light source component 30 of the photothermal hair drying device emits light waves that act on the hair or scalp, and has the characteristics and applications described in Table 1 below: Table 1. Luminous characteristics and efficiency of light source components

[0045] To achieve the desired wavelength and efficacy, the light source component of the photothermal hair drying device of this application may be combined in one or more of the following ways: In method one, the aforementioned filter 32 is used. The light generated by the light source assembly 30 is first filtered by the filter 32 to obtain a predetermined wavelength or band before acting on the hair or scalp. The filter 32 has a predetermined wavelength; filters with different wavelengths can also be used interchangeably to obtain different wavelengths of emitted light, achieving different effects and solving different problems related to hair care, hair nourishment, hair growth, or scalp health. This method is more convenient and has a wider range of applications, allowing for the selection of different filters to obtain more wavelengths.

[0046] Method 2: Applying a filter film. A filter film is applied to the inner and / or outer surface of the light source tube wall to obtain a light source tube with filtering properties. The light generated by the light source is filtered by the filter film to obtain a predetermined wavelength before acting on the hair or scalp. Existing coating processes can be used to apply the filter film to the inner and / or outer surface of the light source tube wall.

[0047] Method 3: Using colored glass lamp tubes, which have a filtering function, the light generated by the light source is filtered by the colored glass lamp tube to obtain a light wavelength corresponding to the color. The colored glass lamp tubes can be prepared by coloring the glass during the optical glass preparation process.

[0048] In some embodiments, the third method uses a colored glass lamp tube, which can be manufactured using existing technology. The light source can be a halogen lamp, tungsten filament lamp, carbon filament lamp, incandescent lamp, etc., and the lamp tube is made of colored glass (tinted optical glass). In a non-limiting example, the glass color corresponds to a predetermined waveband or wavelength as follows: The light source with a red light tube (made of red glass) has a light wavelength of 620-750nm; The light source with orange light tubes (made of orange glass) has a light wavelength of 590-620nm; The light source with a yellow light tube (made of yellow glass) has a light wavelength of 570-590 nm; The light source with green light tubes (made of green glass) has a light wavelength of 495-570nm; The light source with a blue light tube (made of blue glass) has a light wavelength of 450-495nm; The light source with a purple light tube (made of purple glass) has a light wavelength of 380-450nm; The light source with silver / black light tubes (made of silver / black glass) has a light wavelength of 750-2400nm.

[0049] The preparation method of colored glass (colored glass lamp tubes) is based on the preparation steps of optical glass, with the addition of colorants to color the glass. Specifically, trace amounts of colorants are added to the glass batching or optical glass raw materials (which may include quartz sand, soda ash, limestone, etc.), and the colored glass products are obtained after the melting, forming, and annealing steps of optical glass preparation. The preparation of colored glass or glass coloring refers to the following steps: Ingredients: A trace amount of colorant is added to the basic optical glass raw materials (high borosilicate, quartz, soda ash, limestone, etc.); Melting: The glass batch is melted in a high-temperature furnace (about 1500-1600℃), and the colorant is uniformly dispersed in the glass melt in the form of ions or molecules; Molding and annealing: The glass melt is shaped by blowing, die casting or drawing, and then slowly cooled and annealed to obtain the final product (colored glass lamp tube / colored glass).

[0050] In some embodiments, glass coloring can employ existing coloring methods such as ion coloring, colloidal coloring, interlayer coloring, and diffusion coloring. Different coloring methods are used to adjust the type and amount of colorant to achieve the desired optical wavelength range. For example, Tables 2-3 below show the colored glass materials used in the preparation of colored glass lamp tubes for light sources, and the corresponding coloring methods and materials required for their production. "Optical wavelength range" refers to the wavelength range of the light emitted after the light generated by the light source is filtered by the colored glass lamp tube.

[0051] Table 2 Examples of Colored Glass Preparation Using Colloidal Coloring Process

[0052] Table 3 Examples of colored glass prepared by ion coloring process

[0053] The aforementioned colored glass lamp tubes are made using colored optical glass, and the light source can be any of halogen lamps, carbon filament lamps, tungsten filament lamps, or incandescent lamps. The light source tubes made of colored glass give the emitted light a predetermined wavelength or band. The principle is to adjust the light wavelength by modifying the colored optical glass material of the lamp tube (color), for example, adjusting it to the desired light wavelength range from 500nm to 600nm and above to achieve ideal effects for beauty, hair care, and body and hair treatments. For example, the colored wavelength range is 0–750nm, the near-infrared range is 750–2500nm, the mid-infrared range is 2.5–50µm, and the far-infrared range is 50–1000µm. The colored wavelengths range from 380–450–485–500–565–590–625–750nm, corresponding to the color changes: violet–blue–cyan–green–yellow–orange–red. By adjusting the type and amount of colorant and combining it with the optical glass preparation steps, a light source component with a predetermined band or wavelength can be obtained, so that when the light emitted by the light source component of the photothermal hair drying device acts on the hair or skin, it can achieve the predetermined effects of hair care, hair nourishment, hair growth, or scalp health.

[0054] The light source tube 31 in the above embodiment uses colored glass as its colored glass tube, which has a filtering effect. The light emitted by the light source tube 31 is filtered by the colored glass tube to obtain the desired light wavelength. The emitted light then acts on the hair or skin to achieve the desired effect. The principle of controlling the light wavelength can be achieved by adjusting the color of the colored optical glass material. By adjusting the type and amount of colorant in the optical glass preparation step, colored glass with the desired light wavelength can be obtained to make the corresponding colored glass tube.

[0055] In other embodiments, the light source assembly employs a filter element, which can be a filter 32 or a filter film. The light emitted from the light source tube 31, after being filtered by the filter 32 or filter film, has a predetermined wavelength or band, acting on the hair or skin (including the scalp) to achieve the predetermined effects of hair care, hair nourishment, hair growth, or scalp health. In specific embodiments, a filter 32 with a suitable shape is covered on the outside of the light source tube 31, or a filter film is coated on the outer and / or inner wall of the light source tube 31. The photothermal hair drying device of this application utilizes light waves of predetermined wavelengths or bands to achieve effects such as hair care, hair nourishment, hair growth, or scalp health; different light bands can achieve different effects. In some embodiments, the filter or filter film can be a single-band (e.g., 900-1800nm, 380-450nm, or 600-750nm) or a multi-band filter / filter film, for example, selecting two or more light wave ranges (e.g., 380-450nm + 900-1800nm). Different light wave bands have different phototherapy effects on hair / scalp. For example, using the near-infrared band 900-2500nm can stimulate blood circulation in the head; using red light 600-750nm can regulate biochemical enzymes in the human scalp and hair follicles, such as affecting 5-α reductase in male pattern baldness and tyrosinase in gray hair. Protein is the main component of hair. By enhancing the synthesis of ribonucleic acid in human tissue cells through red light, protein synthesis is enhanced, which is beneficial to hair growth and increases hair density and elasticity; using 420nm light can inhibit the growth of Malassezia and improve folliculitis, etc. Alternatively, based on the expected health or therapeutic effects corresponding to the light bands clinically validated in existing technologies, a corresponding filter film or filter can be selected to filter the light generated by the light source, so that the emitted light acting on the hair or skin has the expected light band.

[0056] This photothermal hair drying device uses the photothermal effect and can also use the heat energy of light to quickly and instantly heat the hair to achieve the effects of drying and styling hair; at the same time, it uses the effect of light source to assist in hair styling and treatment; the light source heating is also less likely to burn the hair.

[0057] The filter can be replaced by plugging and unplugging. The filter is located outside the light source tube 31. The plug can be set at the front end of the outer cylinder 19 of the body. The filter of different light bands can be switched by plugging and unplugging through the plug, or the air outlet cover 33 can be pulled out directly to replace the filter 32.

[0058] The principle behind the photothermal hair drying device of this application for achieving hair styling, drying, conditioning, nourishing, promoting hair growth, or scalp health care is as follows: 1. Heating with a light source: The light emitted by the light source directly irradiates the hair, using the heat of light energy and photothermal energy to quickly heat the hair; 2. Using light wave therapy: By selecting light source color glass tubes or filter elements (filters or filter films) of specific light wavelengths, the light emitted from the light source, after being filtered by the light source color glass tubes or filter elements, has a predetermined wavelength and acts on the user's hair and scalp to achieve phototherapy. For example, the light wavelengths and corresponding effects listed in Table 1 above, or the emitted light with a predetermined wavelength such as the near-infrared band 900-2500nm can stimulate blood circulation in the head; or, 420nm light waves inhibit the growth of Malassezia and improve folliculitis; or, the emitted light with a predetermined wavelength such as red light 600-750nm, acting on the user's hair and scalp, can regulate the biochemical enzymes in the human scalp and hair follicles, such as 5-α reductase affecting androgenetic alopecia and tyrosinase affecting gray hair; protein is the main component of hair, and through red light, the synthesis of ribonucleic acid in human tissue cells is enhanced, thereby enhancing protein synthesis, which is beneficial to hair growth and increases hair density and elasticity.

[0059] The photothermal hair drying device of this application can also use the heat energy of light to quickly and instantly heat the hair, and at the same time use the photothermal effect to assist in hair styling and treatment; the light source heating is also less likely to burn the hair.

[0060] The above description is only a preferred embodiment of this application. The scope of protection of this application is not limited thereto. Any equivalent transformation based on the technical solution of this application shall fall within the scope of protection of this application.

Claims

1. A photothermal hair drying device, comprising a body and a handle, the body and the handle being connected to each other; the body has an interior cavity, and the body is provided with an air inlet and an air outlet communicating with the airflow of the cavity; a first control circuit board and a motor electrically connected to the first control circuit board are installed in the cavity; characterized in that, The photothermal hair drying device also includes a light source assembly, which is installed at the air outlet of the device body. The light source assembly includes a light source tube and a filter element with a predetermined wavelength or band. The filter element is configured such that: the tube wall of the light source tube is made of colored glass to obtain a colored glass tube, and / or, a filter is provided on the outside of the light source tube, and / or, a filter film is coated on the inner wall and / or outer wall of the light source tube. The light emitted by the light source has a corresponding predetermined band or wavelength after being filtered by the filter element; the light of the predetermined band or wavelength directly irradiates the hair or scalp, and the heat energy of the light wave heats the hair for drying without easily burning the hair, while simultaneously providing physical therapy to the hair or scalp.

2. The photothermal hair drying device as described in claim 1, characterized in that, The predetermined band or wavelength range is 400–2300 nm.

3. The photothermal hair drying device as described in claim 1, characterized in that, The light source is one of halogen lamp, carbon filament lamp, tungsten filament lamp, or incandescent lamp; the filter element is a single-band, single-wavelength, multi-band, or multi-wavelength filter element.

4. The photothermal hair drying device as described in claim 1, characterized in that, The colored glass is made by adding colorants to the raw materials of optical glass. The type and amount of colorants are adjusted according to the principle of controlling the light band or wavelength based on the color of the optical glass material, thereby obtaining the filtering function of a predetermined band or wavelength.

5. The photothermal hair drying device as described in claim 4, characterized in that, The steps for preparing colored glass lamp tubes include: Ingredients: A trace amount of colorant is added to the basic optical glass raw material; Melting: The ingredients are melted in a high-temperature furnace, and the colorant is uniformly dispersed in the glass melt in the form of ions or molecules; Molding and annealing: The glass melt is blown, die-cast, or drawn into shape, and then cooled and annealed to obtain colored glass tubes.

6. The photothermal hair drying device as described in claim 5, characterized in that, The emitted light from the light source having the aforementioned colored glass tube: It has a predetermined optical band or wavelength of red light, with a band or wavelength range of 620~750nm; or, It has a predetermined optical band or wavelength of near-infrared light, with a band or wavelength range of 750~2400nm; or, It has a predetermined optical band or wavelength of blue light, with a band or wavelength range of 400-495nm; or, It has a predetermined optical band or wavelength of yellow light, with a band or wavelength range of 580-620nm; or, It has a predetermined optical band or wavelength of red light + near-infrared light, with a band or wavelength range of 620~750nm + 750~2400nm.

7. The photothermal hair drying device as described in claim 1, characterized in that, The predetermined band or wavelength of the filter element is a single band or single wavelength or multiple bands or multiple wavelengths in the near-infrared band of 900-2500nm, 900-1800nm, 380-450nm, or 600-750nm.

8. The photothermal hair drying device as described in claim 1, characterized in that, The fuselage is a hollow long cylinder, with the front opening serving as the air outlet to blow air outwards. The light source tube is located on the inner wall of the front opening of the housing, and its shape is adapted to the shape of the front opening so as not to obstruct the air outlet of the housing from blowing outward. The light emitted by the light source is filtered by the filter element and then shines on the hair or scalp.

9. The photothermal hair drying device as described in claim 8, characterized in that, The inner wall of the front end of the hollow long tube is provided with a protrusion to securely install the light source tube; The housing includes an inner cylinder and an outer cylinder, with the outer cylinder fitted over the inner cylinder. The front end of the outer cylinder is longer than that of the inner cylinder. The inner cylinder fits against the inner wall of the outer cylinder, and its front edge forms an annular flange on the inner wall of the outer cylinder. The protrusion is provided on the inner wall of the front end of the outer cylinder. The annular flange and the protrusion clamp and fix the light source tube. The light source assembly also includes a light-transmitting cover plate, which is adapted to the shape of the light source tube and covers the outside of the light source tube. The emitted light from the light source shines on the hair or scalp after being emitted through the light-transmitting cover plate. The shape of the light-transmitting cover plate is adapted to the shape of the front opening and is tensioned and / or clamped to the inner wall of the front end of the outer cylinder.

10. The photothermal hair drying device as described in claim 9, characterized in that, The filter is disposed outside the light source tube, and its shape is adapted to the light source tube; The filter is disposed between the light source tube and the light-transmitting cover plate; The light source tube is annular or arc-shaped, and the protrusion is arc-shaped; The filter is ring-shaped; The light-transmitting cover is ring-shaped; The light source tube is clamped and fixed between the annular flange and the protrusion by several tube brackets; The lamp holder is a flexible clip; The light-transmitting cover plate presses against the light filter and the light source tube.

11. The photothermal hair drying device as described in claim 9, characterized in that, The photothermal hair drying device is equipped with multiple filters that can be switched between. The front end of the hollow cylindrical body of the casing is provided with an insertion port, and different filters can be switched by inserting and removing them from the insertion port; or, the filter and the light-transmitting cover are detachably installed at the air outlet of the casing, and different filters can be switched by removing the filter and the light-transmitting cover.

12. The photothermal hair drying device according to any one of claims 1 to 11, characterized in that, The housing has a protruding rotary bearing, and the top of the handle has a rotary mating part. The rotary mating part on the top of the handle is rotatably connected to the rotary bearing, so that the housing and the handle can rotate relative to each other by a predetermined angle to adjust the angle of the air outlet. The rotary bearing seat has a through hole formed at its center along the axial direction. A connecting shaft is inserted into the hole and its two ends are connected to the rotary fitting at the top of the handle, thereby rotatably connecting the handle to the body. The rotary bearing includes an annular rotating shaft and an outer ring; the annular rotating shaft is sleeved inside the outer ring and can rotate relative to it in a limited manner. The annular rotating shaft is locked in place with the rotary fitting part at the top of the handle; The body and the handle rotate relative to each other through the rotational engagement of the annular shaft.

13. The photothermal hair drying device as described in claim 12, characterized in that, The rotary bearing has a cavity inside, which is connected to the internal cavity of the handle and the internal cavity of the body, for the purpose of laying electronic components or circuits. The annular rotating shaft is rotatably fitted inside the outer ring with multiple limit positions; The fuselage housing includes a first housing and a second housing connected to each other. The first housing has a first circular seat protruding outward, and the second housing has a second circular seat protruding outward. The first housing and the second housing are connected to form an inner cylinder, and the body housing may also be provided with an outer cylinder, which is adapted to fit around the inner cylinder; The first circular seat and the second circular seat are adapted to each other in shape and are connected in a snap-fit ​​manner. The first circular seat is an integral fixed structure of the first housing or is fixedly connected to each other. The second circular seat is an integral fixed structure of the second housing or is fixedly connected to each other. The rotary shaft seat includes a first circular seat, a second circular seat, a first outer circular support, a second outer circular support, an annular rotating shaft, and an outer ring, which are interlocked, adapted to each other, and have the shaft hole formed in the center. The first outer circular bracket is adapted to be fastened to the outer annular wall of the first circular seat and is relatively fixedly connected, and the outer sleeve is adapted to be sleeved inside the annular wall of the first circular seat and is relatively fixedly connected; The first outer circular bracket is provided with a protruding connecting part, which is snapped into the body housing to fix the first outer circular bracket to the body; The second outer circular bracket is adapted to be fastened to the outside of the second circular base and fixedly connected. The second outer circular bracket is provided with a protruding connecting part, which is snapped into the body housing to fix the second outer circular bracket to the body. The first outer circular bracket and the second outer circular bracket are respectively adapted to rotate relative to the rotary fitting part of the handle housing.

14. The photothermal hair drying device as described in claim 13, characterized in that, The first housing, the second housing, and the outer cylinder are provided with slots from the position of the rotary shaft seat to one end of the air inlet. After assembly, they form a through long slot. A connecting cover covers the long slot and is clamped to the first housing, the second housing, and the outer cylinder. The annular rotating shaft is provided with a protrusion; The handle housing includes a third housing and a fourth housing that interlock with each other, and the interior is a cavity; The top of the third housing and the fourth housing are provided with a rotary fitting part, which is rotatably connected to the rotary shaft seat that protrudes outward from the body; the rotary fitting part on the top of the third housing is provided with a protruding connecting shaft, and the end of the connecting shaft is provided with a screw hole; the rotary fitting part on the top of the third housing fits onto the outside of the second outer circular bracket of the rotary shaft seat and can rotate relative to it; the connecting shaft is inserted into the shaft hole of the rotary shaft seat and connected to the rotary fitting part of the fourth housing; and is tightened and fixed by screws passing through the screw holes on the fourth housing and screwing them into the screw holes at the end of the connecting shaft. The rotary fitting part of the fourth housing fits onto the outside of the first outer circular bracket of the rotary bearing and can rotate relative to it; The rotary fitting part of the fourth housing is connected to the annular rotating shaft; a groove is formed in the rotary fitting part of the fourth housing, and the groove is adapted to and locked with the protrusion of the annular rotating shaft, so that the annular rotating shaft and the rotary fitting part of the fourth housing are connected together and rotate together. A groove / protrusion limiting fit is formed between the outer annular wall of the annular shaft and the inner annular wall of the outer sleeve ring.

15. The photothermal hair drying device according to any one of claims 1 to 11, characterized in that, The internal cavity of the fuselage is also equipped with a heating element that is electrically connected to the first control circuit board. A second control circuit board is installed inside the internal cavity of the handle; the second control circuit board is electrically connected to the first control circuit board and is used for power management and power control. The body or handle is provided with a button assembly, which is electrically connected to the first control circuit board or the second control circuit board. A negative ion assembly is installed inside the internal cavity of the device body or the internal cavity of the handle; the negative ion assembly is electrically connected to the first control circuit board or the second control circuit board. One end of the power cord is electrically connected to the second control circuit board, and the other end extends outward from the tail of the handle to connect to the power supply.

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