Laser hair removal device

Abstract

The utility model relates to a big window laser hair removal appearance is equipped with the casing, is equipped with operating button and pilot lamp on the casing, is installed with laser, light guide, refrigerator, heat dissipation subassembly and control circuit in the casing, the light side of laser is equipped with light guide, one side of light guide faces laser, the other side of light guide is the light exit surface, is pasted with refrigerator at the side of light guide, the heat emitting surface of laser, the heat emitting surface of refrigerator links up with heat dissipation subassembly, operating button, pilot lamp, laser, refrigerator and control circuit electricity connection, the size of light guide at the light exit surface reaches 10mm 30mm, has the bigger area to can realize the laser hair removal operation in the big area, because the side of light guide links up with refrigerator, can pass through light guide and directly deliver the cold quantity to the light exit surface, when pasting and pressing to the skin, also can make the skin obtain the cool feeling of ice cold, alleviate the burning sensation of skin because of the laser hair removal and produce, thereby improved the experience of laser hair removal.

Description

Technical Field

[0001] This utility model relates to a laser hair removal device, belonging to the field of laser hair removal equipment. Background Technology

[0002] Laser hair removal devices utilize specific wavelengths of laser light to penetrate the skin's surface, precisely targeting the melanin granules within the hair follicles. The light energy is converted into heat energy, destroying the hair follicle structure, including hair follicle stem cells, thereby inhibiting hair growth and achieving a long-lasting hair removal effect. However, based on the characteristics of hair growth, laser hair removal is only effective on hair follicles in the growth phase, when the melanin content is highest and they are easily destroyed by laser irradiation. Since hair follicles on the human body are often in different growth phases, multiple laser hair removal treatments are required for the specific area to achieve effective, long-lasting, and aesthetically pleasing hair removal.

[0003] To facilitate laser hair removal for beauty enthusiasts, handheld home laser hair removal devices have been developed, integrating the laser into a handheld device for convenient daily home use. However, due to the size limitations of handheld devices, existing laser hair removal devices generally only have a small laser window, resulting in a smaller effective area for the laser beam and consequently lower hair removal efficiency. This necessitates prolonged handheld use to complete laser hair removal on an entire area, placing a strain on the operator's arm strength and endurance. Furthermore, laser hair removal itself converts light energy into heat energy; prolonged use causes heat to accumulate at the laser window area. Excessive temperature buildup at the contact surface between the device and skin can lead to discomfort, and the high temperatures generated during operation may also cause skin irritation or even burns, negatively impacting the user experience. On the other hand, pursuing higher efficiency by making the device too large and heavy results in inconvenience for operators, especially women, and can easily cause hand fatigue.

[0004] The aforementioned problems are mainly due to deficiencies in the structural design, energy control, and heat dissipation mechanisms of existing laser hair removal devices. Therefore, improved hair removal device designs are needed to address these issues by optimizing device size and weight, increasing the hair removal window area, improving hair removal efficiency, and effectively controlling the contact surface temperature to enhance user comfort and safety. Utility Model Content

[0005] The purpose of this invention is to provide a laser hair removal device that improves hair removal efficiency by optimizing the device's size and weight and increasing the area of ​​the hair removal window, while effectively controlling the contact surface temperature to enhance user comfort and safety, thus comprehensively improving the user experience of the laser hair removal device.

[0006] To achieve the above-mentioned purpose of the utility model, the present utility model provides a laser hair removal device, which has a housing, an operation button and an indicator light on the housing, and a laser, a light guide, a cooler, a heat dissipation component and a control circuit installed inside the housing.

[0007] The laser has a light guide on its output side; one side of the light guide faces the laser, and the other side of the light guide is the output side.

[0008] A cooler is attached to the side of the light guide;

[0009] The heating surfaces of the laser and the cooler are connected to the heat dissipation components.

[0010] The operation buttons, indicator lights, laser, cooler, and control circuit are electrically connected.

[0011] As a further improvement of this utility model, some components of the laser, optical guide, cooler and heat dissipation assembly are mounted together by a bracket to form a core component;

[0012] The laser is mounted at the rear of the bracket, and the laser heat sink is attached to the back of the laser. The laser heat sink is fixed to the bracket together with the laser by screws.

[0013] The light guide is inserted into the bracket, and the light guide is matched with the light-emitting surface of the laser.

[0014] The cooler is installed in the TEC mounting cavity at the bottom of the bracket, and the cooling surface of the cooler is in contact with the bottom surface of the light guide;

[0015] The lower part of the cooler is the heating surface, and the cooler's heat sink is installed below the cooler.

[0016] Furthermore, the radiator of the cooler is a heat pipe finned radiator, which has a heat-absorbing copper plate, heat pipes, and heat dissipation fins;

[0017] The heat-absorbing copper plate is installed at the heat dissipation mounting surface of the cooler at the bottom of the bracket. The heat-absorbing copper plate is pressed against the heat-generating surface of the cooler. Screws are screwed through the mounting holes of the heat-absorbing copper plate and into the heat dissipation fixing holes of the bracket, thereby fixing the cooler and the heat-absorbing copper plate together on the bracket. The heat-absorbing copper plate is embedded with heat pipes that extend towards the laser heat sink, and several heat dissipation fins are installed below the laser heat sink.

[0018] Furthermore, the laser heat sink has heat sinks, with each heat sink being perpendicular to the laser and arranged vertically. A laser heat sink composed of several heat sinks forms a heat dissipation channel in the vertical direction.

[0019] The heat dissipation fins are arranged vertically through the heat pipes, and the heat sink composed of several heat dissipation fins forms a heat dissipation channel in the vertical direction.

[0020] The heat dissipation channel of the laser heat sink is connected vertically to the heat dissipation channel formed by the heat dissipation fins.

[0021] Furthermore, a cooling fan is provided, with the exhaust side of the cooling fan facing the heat dissipation channel of the laser heat sink;

[0022] The housing has an air inlet, which is located near the air intake side of the cooling fan.

[0023] The casing has an air outlet, which is located near the air outlet side of the heat dissipation fins.

[0024] Here, external air enters the casing through the air inlet, is blown towards the laser heat sink by the cooling fan, and then blown towards the heat sink fins through the heat sink's heat dissipation channel. The air carries away the heat from the heat sink and finally flows out of the casing with the heat energy through the air outlet.

[0025] Specifically, the cooling fan is an axial-flow cooling fan, and the cooling fan is installed close to the laser heat sink;

[0026] The cooling fan converts the airflow from vertical to horizontal; the top of the laser heat sink is a closed surface.

[0027] Specifically, the shell between the air inlet and the air outlet protrudes inward to form heat insulation ribs.

[0028] As a further improvement of this utility model, the front of the shell is thicker and the rear is thinner; the middle of the shell forms a waist-shaped arc.

[0029] The laser, light guide, and cooler are mounted on the front of the housing;

[0030] The main control circuit board is mounted at the rear of the housing;

[0031] A charging and communication interface is installed at the rear of the casing;

[0032] A switch plate is installed at the upper middle part of the housing;

[0033] The switch panel is equipped with operation buttons and several indicator lights.

[0034] As a further improvement of this utility model, a window is provided at the front end of the shell;

[0035] The center of the window component is an empty window for light to emerge;

[0036] The window is equipped with a skin color detection sensor and a skin color detection sensor circuit board.

[0037] As a further improvement of this utility model, the light guide is a sapphire glass cuboid light guide.

[0038] This invention relates to a laser hair removal device with a light guide at the light-emitting surface measuring up to 10mm × 30mm, providing a large area for laser hair removal. Because the side of the light guide is connected to a cooler, cooling energy can be directly transferred to the light-emitting surface. When pressed against the skin, this provides a cooling sensation, alleviating the burning sensation caused by laser hair removal and thus enhancing the overall experience.

[0039] In the production of this laser hair removal device, the upper shell assembly, core assembly, and window assembly are assembled separately, and then the lower shell and cooling fan are assembled together, realizing modular assembly and making assembly more convenient.

[0040] The laser hair removal device of this invention adopts a clever heat dissipation component design, which achieves efficient heat dissipation of the heat sinks of two heat sources by a single fan, thereby making the structure more compact and small, and meeting the design requirements of handheld devices. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall structure of the laser hair removal device of this utility model. Figure 1 ;

[0042] Figure 2 This is a schematic diagram of the overall structure of the laser hair removal device of this utility model. Figure 2 ;

[0043] Figure 3 This is a schematic diagram of the light-emitting side of the laser hair removal device of this utility model;

[0044] Figure 4 This is a schematic diagram of the internal overall structure of the laser hair removal device of this utility model;

[0045] Figure 5 This is a schematic diagram of the overall structure of the core components of this utility model;

[0046] Figure 6 This is a schematic diagram of the overall structure of the bracket of this utility model;

[0047] Figure 7 This is a schematic diagram of the upper shell assembly of this utility model;

[0048] Figure 8 This is a schematic diagram of the window component of this utility model. Detailed Implementation

[0049] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0050] The purpose of this utility model is to provide a laser hair removal device, the overall shape and structure of which are as follows: Figure 1 , Figure 2 , Figure 3 As shown, the exterior is enclosed by a housing 1, which forms a space for component installation. For details of the internal structure, please refer to [reference needed]. Figure 4 The front of the housing 1 is relatively thick, and the rear is relatively thin, forming a tapered arc 11 in the middle and rear for easy handling by the operator. Several ventilation holes 12 are provided at the lower front of the housing 1. An operation button 15 and an indicator light 16 are located at the upper middle of the housing 1. Pressing the operation button 15 allows for power on / off and mode adjustment, especially for adjusting the laser intensity. The operator can select a suitable laser hair removal intensity based on their tolerance. The indicator light 16 displays the working status and battery level. The front end of the housing 1 is the contact surface for skin contact, and the middle is the light-emitting surface 17 from which the laser beam for hair removal is emitted. One or two detection sensor windows 18 are provided around the light-emitting surface 17, such as skin contact sensors, to detect whether the contact surface is in contact with the skin, thus achieving safety protection. A skin color detection sensor can also be installed here to detect the skin condition and adjust the laser beam intensity accordingly, ensuring laser hair removal is performed within a safe intensity range.

[0051] The laser hair removal device of this utility model mainly includes a laser 2, a light guide 3, a cooler 4, a heat dissipation component 5, and a control circuit.

[0052] Laser 2 is preferably a surface light source laser module, which can emit a laser beam over a large area at the same time.

[0053] The laser 2 is provided with a light guide 3 on the light-emitting side; the light guide 3 is a rectangular body with one side facing the laser and the other side being the light-emitting surface 17 of the housing 1; by setting the light guide 3, the laser beam emitted by the laser 2 can be further shaped and homogenized, so that the energy of the laser beam is more evenly distributed within the light-emitting surface 17, and local high-temperature burns are avoided.

[0054] A further improvement of this invention is that a cooler 4 is attached to the side of the light guide 3. The cooler 4 is preferably a thermoelectric cooling module (TEC), which uses the Peltier effect of semiconductor materials to achieve cooling or heating. When the thermoelectric cooling module TEC is powered on, one side will generate cold energy. This side will fit and adhere tightly to the side of the light guide 3, thereby directly and efficiently transferring the generated cold energy to the light guide 3. The other side of the thermoelectric cooling module TEC will generate heat, which needs to be connected to a heat dissipation component 5 for heat dissipation.

[0055] The laser 2 also generates heat during operation and needs to be connected to the heat dissipation component 5 for heat dissipation. Therefore, the laser hair removal device of this utility model has two major heat sources, the laser 2 and the cooler 4, at the front of the housing 1, which need to be dissipated efficiently through the heat dissipation component 5.

[0056] Further integration Figure 5 , Figure 6 The laser 2, optical guide 3, cooler 4 and heat dissipation component 5 are assembled together by bracket 7 to form the core component, which is convenient for disassembly and assembly.

[0057] The rear of the bracket 7 has a laser mounting surface 71. The light-emitting side of the laser 2 can be attached to the laser mounting surface 71, and then the laser heat sink 51 can be pressed against the back of the laser 2, that is, it is in close contact with the heat dissipation surface of the laser 2. At this time, the laser heat sink 51 is installed at the laser heat sink mounting surface 72 at the rear of the bracket 7. By passing the laser heat sink 51 through the screw and screwing it into the fixing holes 725 around the laser heat sink mounting surface 72 of the bracket 7, the laser 2 and the laser heat sink 51 are installed and fixed on the bracket 7.

[0058] The optical guide 3 is inserted into the bracket 7 from the front end, that is, it is located in the optical guide mounting cavity 73. The position of the optical guide 3 is adjusted so that it abuts against the optical guide limiting surface 733 in the bracket 7, so that the distance between the optical guide 3 and the laser 2 is fixed and the distance between the two meets the design requirements.

[0059] To achieve efficient heat dissipation, a cooler 4 is installed at the bottom of the light guide 3. The cooler 4 is installed in the TEC fixing cavity 74 at the bottom of the bracket 7 for positioning. The cooling surface of the cooler 4 is in contact with the bottom surface of the light guide 3; the heating surface of the cooler 4 is exposed below. At this time, a heat sink for the cooler is installed below the cooler 4. To ultimately achieve efficient heat dissipation, the heat sink for the cooler 4 is a heat pipe fin heat sink, which has a heat-absorbing copper plate 53, a heat pipe 54, and heat dissipation fins 55. The heat-absorbing copper plate 53 is pressed against the heating surface of the cooler 4. On the surface, namely at the heat dissipation mounting surface 75 of the cooler installed at the bottom of the bracket 7, the fixing screws pass through the mounting holes on both sides of the heat-absorbing copper plate 53 and are screwed into the heat dissipation fixing holes 755 of the cooler at the bottom of the bracket 7, thereby fixing the cooler 4 and the heat-absorbing copper plate 53 together on the bracket 7. During this process, the cooler 4 is pressed against the bottom surface of the light guide 3, which also fixes the light guide 3 inside the bracket 7. The heat-absorbing copper plate 53 is embedded with a heat pipe 54, which extends towards the laser heat sink 51 and several heat dissipation fins 55 are installed below the laser heat sink 51.

[0060] The laser heat sink 51 also has heat sinks. Each heat sink is perpendicular to the laser 2 and arranged vertically. The laser heat sink 51 composed of several heat sinks forms a heat dissipation channel in the vertical direction. The heat dissipation fins 55 are also arranged vertically through the heat pipe 54. The heat dissipation fins 55 also form a heat dissipation channel in the vertical direction. The heat dissipation channel of the laser heat sink 51 and the heat dissipation channel formed by the heat dissipation fins 55 are connected vertically.

[0061] Furthermore, a cooling fan 52 is also provided inside the housing 1, and the cooling fan 52 is preferably installed close to the laser heat sink 51; for example Figure 4 As shown, the cooling fan 52 is an axial cooling fan similar to that used in laptops. Its air intake side faces the ventilation hole 12 on the housing 1, which is the air intake hole 121. After passing through the cooling fan 52, the air forms a horizontal exhaust and blows towards the laser heat sink 51. The top of the laser heat sink 51 is preferably a closed surface. Therefore, after the cooling air is blown into the heat dissipation channel of the laser heat sink 51, it carries away the heat on the heat sink. Then it can only move downwards and blow into the area of ​​the heat dissipation fins 55, which carries away the heat on the heat dissipation fins 55. Finally, it is blown out through the ventilation hole 12 on the housing 1, which is the exhaust hole 122. Thus, efficient air cooling of the two heat sources, the laser 2 and the cooler 4, can be achieved with just one cooling fan 52.

[0062] Preferably, a heat insulation rib is formed by protruding inward on the housing 1 between the air inlet 121 and the air outlet 122, which separates the ventilation holes 12 on both sides to prevent air from flowing through the housing 1 and reducing the heat dissipation efficiency.

[0063] The bracket 7 has several mounting ears 77 on both sides, which are used to mount the bracket 7 and the various devices mounted on it as a whole onto the housing 1 to achieve modular installation.

[0064] Further as Figure 7 As shown, the control circuit is mainly installed at the rear of the housing 1, including the main control circuit board 61, battery 62, charging communication interface 63, and switch board 64. The charging communication interface 63 is fixed to the rear of the housing 1 as a tail plug, and adopts a micro USB port or Type-C interface to realize the integration of charging interface and communication interface. The switch board 64 is equipped with operation button 15 and several indicator lights 16. The housing 1 has holes for operation button 15, and several light-transmitting holes 161 are opened at the positions of indicator lights 16 to allow the indicator light emitted by indicator lights 16 to pass through.

[0065] The battery 62 in the above embodiment is optional and can be omitted. When the battery 62 is not installed, it needs to be powered by a power source through the charging communication interface 63 at the rear in order to turn on and use the device.

[0066] Further as Figure 8As shown, a window 13 is provided at the front end of the housing 1, with an empty window in the middle for the light-emitting surface 17. A circuit board is embedded in the window 13 for mounting sensors, especially a skin color detection sensor, and detection is performed through the sensor window 18. The skin color detection sensor can also be used as a contact sensor; it can only detect normal skin color and then work when it is in contact with the skin. The circuit board extends to the rear via a ribbon cable 66 and connects to the main control circuit board 61.

[0067] Laser 2 is also connected to the main control circuit board 61 via wires.

[0068] The laser hair removal device of this invention features a light guide 3 at the light-emitting surface 17, measuring up to 10mm × 30mm, providing a large area for laser hair removal over a wide area. Because the side of the light guide 3 is connected to the cooler 4, cooling energy can be directly transferred to the light-emitting surface 17 via the light guide 3. When pressed against the skin, this provides a cooling sensation, alleviating the burning sensation caused by laser hair removal and improving the overall experience. To achieve efficient cooling of the light guide 3, it is preferably made of sapphire glass. Sapphire glass typically has a thermal conductivity of 30-40 W / (m·K), allowing for rapid cooling and ensuring that the surface of the light guide 3 in contact with the skin maintains a low temperature quickly and continuously after the device is turned on.

[0069] In the production of this laser hair removal device, the housing 1 is divided into an upper housing, a lower housing, and a window 13. A switch board 64, a main control circuit board 61, and a charging communication interface 63 are installed inside the upper housing, thus forming a structure as follows: Figure 7 The upper shell assembly is shown; while some components of the laser 2, light guide 3, cooler 4, and heat dissipation assembly 5 are mounted on the bracket 7 to form the core assembly; the skin color detection sensor, corresponding circuit board, etc., are mounted inside the window 13 to form the window assembly; during final assembly, the empty window of the light-emitting surface 17 of the window assembly is aligned with the protruding end of the light guide 3 of the core assembly and then both are snapped into the front of the upper shell assembly. The slot of the window assembly is engaged with the buckle of the upper shell. Then, the mounting ears 77 of the bracket 7 are aligned with the mounting positions on the upper shell, and screws are screwed in to fix it. The ribbon cable of the skin color detection sensor circuit board is then installed. 66. The wires of laser 2 and cooler 4 are respectively connected to the interfaces on the main control circuit board 61. All wires are routed from the top or side to avoid obstructing the heat dissipation airflow. Next, the cooling fan 52 module is removed and installed and fixed. The air outlet of the cooling fan 52 is snapped into the laser heat sink 51 to achieve efficient airflow and heat dissipation. The wires of the cooling fan 52 are also connected to the interfaces on the main control circuit board 61. Finally, the shell is removed, and the clips are aligned to achieve a snap-fit ​​connection. At this point, the two sets of ventilation holes 12 on the lower shell are precisely aligned with the cooling fan 52 and the heat sink fins 55, respectively. Screws are tightened to secure the connection, thus obtaining the desired result. Figure 1 , Figure 2 , Figure 4 The laser hair removal device of this utility model is shown.

[0070] The preferred embodiments of this utility model have been described in detail above, but this utility model is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this utility model, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A laser hair removal device, characterized in that, It has a housing with operation buttons and indicator lights on it. Inside the housing are installed a laser, a light guide, a cooler, a heat dissipation component, and a control circuit. The laser has a light guide on its output side; one side of the light guide faces the laser, and the other side of the light guide is the output side. A cooler is attached to the side of the light guide; The heating surfaces of the laser and the cooler are connected to the heat dissipation components. The operation buttons, indicator lights, laser, cooler, and control circuit are electrically connected.

2. The laser hair removal device as described in claim 1, characterized in that, The laser, optical guide, cooler, and heat dissipation components are mounted together using a bracket to form the core component. The laser is mounted at the rear of the bracket, and the laser heat sink is attached to the back of the laser. The laser heat sink is fixed to the bracket together with the laser by screws. The light guide is inserted into the bracket, and the light guide is matched with the light-emitting surface of the laser. The cooler is installed in the TEC mounting cavity at the bottom of the bracket, and the cooling surface of the cooler is in contact with the bottom surface of the light guide; The lower part of the cooler is the heating surface, and the cooler's heat sink is installed below the cooler.

3. The laser hair removal device as described in claim 2, characterized in that, The radiator of the refrigerator is a heat pipe finned radiator, which has a heat-absorbing copper plate, heat pipes, and heat dissipation fins; The heat-absorbing copper plate is installed at the heat dissipation mounting surface of the cooler at the bottom of the bracket. The heat-absorbing copper plate is pressed against the heat-generating surface of the cooler. Screws are screwed through the mounting holes of the heat-absorbing copper plate and into the heat dissipation fixing holes of the bracket, thereby fixing the cooler and the heat-absorbing copper plate together on the bracket. The heat-absorbing copper plate is embedded with heat pipes that extend towards the laser heat sink, and several heat dissipation fins are installed below the laser heat sink.

4. The laser hair removal device as described in claim 3, characterized in that, The laser heat sink has heat sinks. Each heat sink is perpendicular to the laser and arranged vertically. A laser heat sink composed of several heat sinks forms a heat dissipation channel in the vertical direction. The heat dissipation fins are arranged vertically through the heat pipes, and the heat sink composed of several heat dissipation fins forms a heat dissipation channel in the vertical direction. The heat dissipation channel of the laser heat sink is connected vertically to the heat dissipation channel formed by the heat dissipation fins.

5. The laser hair removal device as described in claim 4, characterized in that, It is equipped with a cooling fan, with the exhaust side of the cooling fan facing the heat dissipation channel of the laser heat sink; The casing has an air inlet, which is located near the air intake side of the cooling fan; The casing has an air outlet, which is located near the air outlet side of the heat dissipation fins.

6. The laser hair removal device as described in claim 5, characterized in that, The cooling fan is an axial flow cooling fan, and the cooling fan is installed close to the laser heat sink; The cooling fan converts the airflow from vertical to horizontal; the top of the laser heat sink is a closed surface.

7. The laser hair removal device as described in claim 5 or 6, characterized in that, The shell between the air inlet and the air outlet protrudes inward to form heat insulation ribs.

8. The laser hair removal device as described in claim 1, characterized in that, The front of the shell is thicker than the back; the middle of the shell forms a tapering arc. The laser, light guide, and cooler are mounted on the front of the housing; The main control circuit board is mounted at the rear of the housing; A charging and communication interface is installed at the rear of the casing; A switch plate is installed at the upper middle part of the housing; The switch panel is equipped with operation buttons and several indicator lights.

9. The laser hair removal device as described in claim 1 or 8, characterized in that, The front end of the housing is equipped with a window. The center of the window component is an empty window for light to emerge; The window is equipped with a skin color detection sensor and a skin color detection sensor circuit board.

10. The laser hair removal device as described in claim 1, characterized in that, The light guide is a sapphire glass cuboid light guide.

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