A laser hair removal device

Abstract

This application provides a laser hair removal device, relating to the field of medical aesthetics technology. The device includes a base, a detection component mounted on the base, a first detector, a controller, and a laser. The detection component, the first detector, and the laser are electrically connected to the controller. The first detector emits an RGB light signal towards a reflector to obtain skin color information based on the reflected first reflection signal, or emits a first monochromatic light signal towards the reflector and receives the reflected second reflection signal to confirm that the detection surface of the first detector has contacted the reflector. After contacting the reflector, the detection component obtains a contact capacitance signal to confirm that the contacted reflector is human skin. The controller outputs the received skin color information and determines whether the laser can enter the working state or controls the laser to stop working based on the received second reflection signal and contact capacitance signal. This laser hair removal device has a high accuracy rate in contact judgment and can obtain skin color information of the human skin.

Description

Technical Field

[0001] This application relates to the field of medical aesthetics technology, and more specifically, to a laser hair removal device. Background Technology

[0002] Laser hair removal devices utilize the theory of selective photothermolysis, using lasers for hair removal treatment. The laser wavelength is precise and has greater energy spread, allowing doctors to use appropriate wavelengths, energy densities, and pulse widths based on the patient's skin tone, hair color, pain perception, and other factors to achieve hair removal. With the continuous advancement of laser hair removal technology and people's pursuit of beauty and a better experience, people are no longer satisfied with just basic hair removal; they are now seeking a safer, more comfortable, and comprehensive hair removal experience.

[0003] Existing laser hair removal devices utilize both photodetectors and cooling sensors. The laser is activated only when the controller receives both a reflected signal from the photodetector and a capacitive signal from the cooling sensor. This dual-determination method improves the accuracy of contact detection, the reliability and accuracy of laser activation, and user safety. However, it cannot acquire skin color information. Laser hair removal devices that can acquire skin color information have lower accuracy and reliability in laser activation, failing to meet user safety requirements. Utility Model Content

[0004] The purpose of this application is to address the shortcomings of the prior art by providing a laser hair removal device with a high accuracy rate in contact detection and the ability to acquire skin color information of the human body.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0006] This application provides a laser hair removal device, including: a base, a detection component disposed on the base, a first detector, a controller, and a laser. The detection component, the first detector, and the laser are electrically connected to the controller. The first detector emits an RGB light signal to a reflector to obtain skin color information of the human skin based on the reflected first reflection signal, or emits a first monochromatic light signal to the reflector and receives the reflected second reflection signal to confirm that the detection surface of the first detector has contacted the reflector. After contacting the reflector, the detection component obtains a contact capacitance signal to confirm that the contacted reflector is human skin. The controller outputs the received skin color information and determines whether the laser can enter the working state or controls the laser to stop working based on the received second reflection signal and contact capacitance signal.

[0007] Optionally, the base is provided with control switches that are electrically connected to the detection component and the first detector respectively; when the control switch is in the first position, the detection component is off and the first detector emits RGB light signals; when the control switch is in the second position, the detection component is on and acquires a contact capacitance signal after contacting the reflector, and the first detector emits a first monochromatic light signal and receives the reflected second reflection signal.

[0008] Optionally, the detection component includes a cooling head electrically connected to the controller, and the cooling head sends the acquired contact capacitance signal to the controller after contacting the reflector; or, the detection component includes a cooling head and a second detector disposed on the cooling head, the second detector being electrically connected to the controller, and the second detector sending the acquired contact capacitance signal to the controller after contacting the reflector.

[0009] Optionally, the detection component has a detection surface, and the laser hair removal device also includes a third detector electrically connected to the controller. The third detector emits a second monochromatic light signal toward the reflector and receives a third reflected signal. The controller determines whether the laser can enter the working state or controls the laser to stop working based on the received second reflected signal, third reflected signal and contact capacitance signal. The first monochromatic light signal and the second monochromatic light signal are emitted from the detection surface, and the orthographic projections of the first detector and the third detector on the detection surface have no overlapping area.

[0010] Optionally, the detection surface is a ring shape with the ends connected, and the total number of the first detector and the third detector is multiple, wherein the number of the first detector is at least one, the number of the third detector is at least one, and the orthographic projections of the multiple detectors on the detection surface are evenly distributed or symmetrically distributed.

[0011] Optionally, there is one first detector and one third detector, and the orthographic projections of the first detector and the third detector on the detection surface are arranged symmetrically with respect to the center of the detection surface.

[0012] Optionally, the laser hair removal device also includes a circuit board, on which the first detector and the third detector are both connected and electrically connected to the controller.

[0013] Optionally, the first detector includes a first light-emitting unit, a first receiving unit, a second receiving unit, and a first signal transmission circuit. The first signal transmission circuit is electrically connected to the first receiving unit, the second receiving unit, and the controller, respectively. The first light-emitting unit emits an RGB light signal or a first monochromatic light signal to the reflector. The first receiving unit receives the reflected first reflected signal. The second receiving unit receives the reflected second reflected signal. The first signal transmission circuit sends the first reflected signal or the second reflected signal to the controller.

[0014] Optionally, the third detector includes a second light-emitting unit, a third receiving unit, and a third signal transmission circuit. The third signal transmission circuit is electrically connected to the third receiving unit and the controller, respectively. The second light-emitting unit emits a second monochromatic light signal toward the reflector. The third receiving unit receives the reflected third signal. The third signal transmission circuit sends the third reflected signal to the controller.

[0015] Optionally, the laser hair removal device includes a filter disposed on the detection surface, the filter being located in the light output path of the first detector or the third detector.

[0016] The beneficial effects of this application include:

[0017] This application provides a laser hair removal device, including: a base, a detection component disposed on the base, a first detector, a controller, and a laser. The detection component, the first detector, and the laser are electrically connected to the controller. The first detector emits an RGB light signal to a reflector to obtain skin color information of human skin based on the reflected first reflection signal, or emits a first monochromatic light signal to the reflector and receives the reflected second reflection signal to confirm that the detection surface of the first detector has contacted the reflector. After contacting the reflector, the detection component obtains a contact capacitance signal to confirm that the contacted reflector is human skin. The controller outputs the received skin color information and determines whether the laser can enter the working state or controls the laser to stop working based on the received second reflection signal and contact capacitance signal.

[0018] The laser hair removal device of this application embodiment is equipped with a detection component and a first detector. The first detector has two functions, one of which can be activated at a time. Before treatment, the first function of the first detector is activated, sending an RGB light signal to the reflector. The first reflected signal reflected back by the reflector is sent to the controller to obtain the skin color information of the human skin, and the skin color information is then output. During treatment, the second function of the first detector is activated, sending a first monochromatic light signal to the reflector and receiving the second reflected signal, which is transmitted to the controller to detect whether the detection component is in contact with the reflector. If it is in contact with the reflector, the controller determines that the second reflected signal is a valid signal. At the same time, it can also send the contact capacitance signal between the detection component and the reflector to the controller to determine whether the contacted reflector is human skin. If so, the controller determines that the contact capacitance signal is a valid signal. The controller will only send a control signal to the laser to enter the working state and emit laser when it determines that both the received second reflected signal and the contact capacitance signal are valid signals. The laser in this state can emit a laser beam only when it receives the start signal. Furthermore, when the laser emits laser light, if either the second reflection signal or the contact capacitance signal is abnormal—that is, if the controller determines it to be an invalid signal—the controller immediately sends a stop signal to the laser to prevent accidental skin injury from the laser beam under abnormal conditions. This dual-determination method improves the accuracy of contact detection in the laser hair removal device, thereby enhancing the accuracy and reliability of laser startup. It also ensures user safety through direct feedback of the stop signal, preventing accidental triggering of the laser hair removal device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the laser hair removal device provided in the embodiments of this application;

[0021] Figure 2 This is a logic control block diagram of the laser hair removal device provided in the embodiments of this application before treatment;

[0022] Figure 3 This is one of the logic control block diagrams for the laser hair removal device provided in the embodiments of this application during treatment;

[0023] Figure 4 This is the second logic control block diagram of the laser hair removal device provided in the embodiments of this application during treatment;

[0024] Figure 5 This is the third logic control block diagram of the laser hair removal device provided in the embodiments of this application during treatment;

[0025] Figure 6 A schematic diagram of the projection of the first detector, the second detector, and the third detector on the detection surface in the laser hair removal device provided in the embodiments of this application.

[0026] Icons: 10-Laser hair removal device; 11-Base; 12-Detector assembly; 121-Cooling head; 1211-Detection surface; 1212-Treatment surface; 122-Second detector; 13-First detector; 14-Controller; 15-Laser; 16-Third detector; 17-Circuit board; 181-Wire; 182-Plug; 183-Cable assembly; 19-Filter; 20-Human skin. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Without conflict, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this application, it should be noted that the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] It should be noted that the laser hair removal device in this application embodiment is used for laser hair removal on human skin. To ensure the protection of human skin before and during operation, it is necessary to confirm the position facing the laser hair removal device. Therefore, after completing tasks such as skin color detection, before starting treatment, it is still necessary to confirm the second reflection signal and the contact capacitance signal through the controller 14. The second reflection signal is used to confirm whether the working position has been attached to the physical material, i.e., the aforementioned reflector. The contact capacitance signal is used to determine whether the contacted reflector is human skin. Therefore, in the foregoing description, the physical material facing the laser hair removal device is referred to as the reflector.

[0031] The following provides a detailed description of the operation and functionality of the laser hair removal device according to an embodiment of this application during the laser hair removal process. Hereinafter, it is assumed that the reflective surface contacted by the laser hair removal device is human skin; therefore, human skin 20 will be used as the reference in the following description.

[0032] This application provides a laser hair removal device 10, such as... Figure 1 As shown, the laser hair removal device 10 includes: a base 11, a detection component 12 disposed on the base 11, a first detector 13, a controller 14, and a laser 15. The detection component 12, the first detector 13, and the laser 15 are electrically connected to the controller 14. The first detector 13 emits RGB light signals to the human skin 20 to obtain skin color information of the human skin 20 based on the reflected first reflection signal, or emits a first monochromatic light signal to the human skin 20 and receives the reflected second reflection signal to confirm that the detection surface of the first detector 13 has contacted the human skin 20. After contacting the human skin 20, the detection component 12 obtains a contact capacitance signal to confirm that the contacted reflector is indeed the human skin 20. The controller 14 outputs skin color information and determines whether the laser 15 can enter the working state or controls the laser 15 to stop working based on the received second reflection signal and contact capacitance signal. The laser hair removal device 10 has a high accuracy rate in contact judgment and can obtain skin color information of the human skin 20.

[0033] Specifically, such as Figure 3 As shown, the detection component 12 is the part of the laser hair removal device 10 that contacts the human skin 20. The detection component 12 has a detection function. After contacting the human skin 20, it can acquire the contact capacitance signal and send the contact capacitance signal to the controller 14.

[0034] The first detector 13 has at least two functions, such as Figure 2 As shown, the first function is to emit RGB light signals to human skin 20 to obtain skin color information of human skin 20 based on the first reflected signal. Please refer to [further details]. Figure 3 The second function is that the first detector 13 emits a first monochromatic light signal towards the human skin 20 and receives the reflected second signal, using the second reflected signal to confirm that the detection surface of the first detector 13 has come into contact with the human skin 20. Either of the two functions of the first detector 13 can be activated, and the current functional mode of the first detector 13 is determined by a control signal issued by the controller 14.

[0035] For example, the laser hair removal device 10 of this application embodiment can operate in the following manner in a specific scenario of one embodiment. Before treatment, the first function of the first detector 13 is activated to acquire skin color information of the human skin 20 (by obtaining skin color information by acquiring RGB values ​​in the controller 14 through the received first reflection signal), and outputs the skin color information. The controller 14 outputs the skin color information, for example, by displaying it on an external display screen or storing the data information. At this time, since treatment has not yet started, the detection component 12 can be turned on or off, preferably off, to save energy.

[0036] When the preparatory work is completed and treatment can proceed, the first detector 13 switches to the second function and the detection component 12 is activated. The first detector 13 continuously emits a first monochromatic light signal towards the human skin 20 and receives a second reflected signal reflected back from the human skin 20. The first detector 13 then sends the second reflected signal to the controller 14. The controller 14 determines whether the first detector 13 has come into contact with a reflective object of a physical structure based on the second reflected signal. If the detection component 12 is in contact with the human skin 20 while in the activated state, a contact capacitance is formed between the component and the skin, and the resulting contact capacitance signal is sent to the controller 14. When the controller 14 simultaneously receives the second reflected signal (meaning that a specific reflective object has been contacted based on the second reflected signal, which is considered a valid signal) and the contact capacitance signal (meaning that the contacted reflective object is the human skin 20 based on the contact capacitance signal, which is considered a valid signal), it can be understood that the preparatory work for the operation has been completed through detection. A control signal is sent to the laser 15 to enable it to enter working state and emit laser light. In this state, the laser 15 will only emit a laser beam upon receiving a start signal (e.g., by activating the laser 15 via a button switch). Furthermore, when the laser 15 is emitting laser light for treatment, if either the second reflection signal or the contact capacitance signal becomes abnormal (signals are continuously sent and received; abnormality refers to either signal being determined to be invalid), such as the second reflection signal being determined to be invalid or the contact capacitance signal being abnormal, it may indicate that the working distance between the laser hair removal device and the human skin 20 exceeds the safe distance, or that a foreign object has entered, posing a safety hazard. In this case, the controller 14 will immediately send a stop signal to the laser 15, thus controlling the laser 15 to stop emitting laser light to avoid accidental injury to the skin from the laser beam in an abnormal state.

[0037] In summary, the laser hair removal device 10 provided in this application is equipped with both a detection component 12 and a first detector 13. The first detector 13 has two functions, one of which can be activated at a time. Before treatment, the first function of the first detector 13 is activated, sending an RGB light signal to the human skin 20. The first reflected signal reflected back from the human skin 20 is sent to the controller 14 to obtain the skin color information of the human skin 20, and the skin color information is then output. During treatment, the second function of the first detector 13 is activated, sending a first monochromatic light signal to the human skin 20 and receiving the reflected second reflected signal, which is then transmitted to the controller 14 to detect whether the detection component 12 is in contact with a reflective solid structure. If contact is made, the controller 14 determines that the second reflected signal is a valid signal. At the same time, the contact capacitance signal between the detection component 12 and the human skin 20 can also be sent to the controller 14 to determine whether the contacted object is human skin 20. If so, the controller 14 determines that the contact capacitance signal is a valid signal. The controller 14 will only send a control signal to the laser 15 to enter the working state and emit laser light when both the received second reflection signal and the contact capacitance signal are valid. In this state, the laser 15 can only emit a laser beam upon receiving the start signal. Furthermore, if either the second reflection signal or the contact capacitance signal is abnormal (i.e., determined to be invalid by the controller 14), the controller 14 will immediately send a stop signal to the laser 15 to prevent accidental skin injury from the laser beam under abnormal conditions. This dual-determination method improves the accuracy of contact detection in the laser hair removal device 10, thereby enhancing the accuracy and reliability of the laser 15's start-up and ensuring user safety through direct feedback of the stop signal, thus preventing accidental triggering of the laser hair removal device 10.

[0038] Optionally, the base 11 is provided with control switches that are electrically connected to the detection component 12 and the first detector 13, respectively. The control switches can be mechanical switches or touch switches. The control switches have at least a first position and a second position, which are switched manually.

[0039] When the control switch is in the first position, the detection component 12 is off, and the first detector 13 emits an RGB light signal. When the control switch is in the second position, the detection component 12 is on. When the detection component 12 is on, it forms a contact capacitance with the human skin 20 after contacting the human skin 20 and acquires the contact capacitance signal. When the control switch is in the second position, the first detector 13 emits a first monochromatic light signal and receives the reflected second signal.

[0040] In a specific working scenario corresponding to an example of the laser hair removal device 10 in this application embodiment, before treatment, the control switch is in the first position. The first detector 13 emits an RGB light signal to the human skin 20 and sends the reflected first reflection signal to the controller 14, so that the controller 14 can obtain the skin color information of the human skin 20 based on the first reflection signal and output the skin color information for display or storage. During treatment, the control switch is switched to the second position. The first detector 13 emits a first monochromatic light signal and receives the reflected second reflection signal. The detection component 12 is turned on to obtain the contact capacitance signal. When the controller 14 simultaneously receives the second reflection signal sent by the first detector 13 and determines it to be a valid signal and the contact capacitance signal sent by the detection component 12 and determines it to be a valid signal, it sends a start control signal to the laser 15 to enable it to enter the working state and emit laser light. At this time, the laser 15 can only emit a laser beam when it receives the start control signal.

[0041] The aforementioned laser hair removal device 10 uses a control switch to manually switch the function of the first detector 13 and the opening and closing of the detection component 12. Users can adjust the laser hair removal device 10 in a timely manner according to the treatment stage and actual treatment needs to further improve the user experience.

[0042] Alternatively, please refer to Figure 1 and Figure 4 In some feasible implementations, the detection component 12 includes a cooling head 121, which is electrically connected to the controller 14. After contacting human skin, the cooling head 121 sends the acquired contact capacitance signal to the controller 14.

[0043] The cooling head 121 is used to contact human skin 20 during laser treatment, providing cooling and heat dissipation to the skin, preventing burns caused by localized laser effects, and providing a comfortable skin experience during the treatment process. Simultaneously, after contacting human skin 20, the cooling head 121 forms a contact capacitance with the skin. By acquiring this contact capacitance signal, it can reflect whether the cooling head 121 is in contact with the skin. For example, if the reflector contacted by the cooling head 121 is not human skin 20, either a contact capacitance cannot be formed, or the parameters of the formed contact capacitance are significantly abnormal and exceed a reasonable value range. This allows for the determination of signal validity.

[0044] Alternatively, in some other feasible implementations, reference is still made to Figure 1 and Figure 4 The detection component 12 includes a cooling head 121 and a second detector 122 disposed on the cooling head 121. The second detector 122 is electrically connected to the controller 14. After contacting human skin 20, the second detector 122 sends the acquired contact capacitance signal to the controller 14.

[0045] The second detector 122 is mounted on the cooling head 121. The second detector 122 forms a contact capacitance with the human skin 20. By acquiring the contact capacitance signal and transmitting it to the controller 14, it is determined whether the working surface of the laser hair removal device has formed good contact with the skin. The second detector 122 is specifically used to acquire the contact capacitance signal; for example, the second detector 122 is a probe mounted on the cooling head 121. This improves the response speed and detection accuracy of the contact capacitance signal acquisition.

[0046] Alternatively, please refer to Figure 1 and Figure 5 The detection component 12 has a detection surface 1211. When the detection component 12 comes into contact with human skin 20, the detection surface 1211 adheres to human skin 20.

[0047] The laser hair removal device 10 also includes a third detector 16 electrically connected to the controller 14. The third detector 16 emits a second monochromatic light signal to the human skin 20 and receives a third reflected signal. The controller 14 determines whether the laser 15 can enter the working state or controls the laser 15 to stop working based on the received second reflected signal, third reflected signal and contact capacitance signal.

[0048] The first monochromatic light signal and the second monochromatic light signal are emitted from the detection surface 1211. The first detector 13 receives the second reflected signal reflected back from the human skin 20 and sends the second reflected signal to the controller 14. The third detector 16 receives the third reflected signal reflected back from the human skin 20 and sends the third reflected signal to the controller 14. The controller 14 can determine whether the corresponding position is in contact with the reflector of the physical object by judging the second and third reflected signals respectively, thereby determining whether it is a valid signal.

[0049] It should be noted that the first detector 13 outputs an RGB signal in the first position. When switching to the second position, the first monochromatic light signal is a monochromatic visible light within the RGB light band, while the second monochromatic light signal typically uses an infrared light signal. Simultaneously, the detection component 12 forms a contact capacitance after the cooling head 121 contacts the human skin 20, and also sends a contact capacitance signal to the controller 14. The controller 14 will only send a control signal to the laser 15 to allow it to enter the working state and emit laser light when it simultaneously receives the second reflection signal and determines it to be valid, receives the third reflection signal and determines it to be valid, and receives the contact capacitance signal and determines it to be valid. If the controller 14 cannot receive the second reflection signal, the third reflection signal, and the contact capacitance signal, or if any of the received signals is invalid, it will control the laser 15 to stop emitting laser light.

[0050] It should also be noted that in the laser hair removal device 10 of this application embodiment, the first detector 13, or the third detector 16, is usually also disposed on the detection surface 1211 of the detection component 12. Therefore, the first monochromatic light signal and the second monochromatic light signal are emitted from the detection surface 1211.

[0051] Please refer to the reference. Figure 6 The orthographic projections of the first detector 13 and the third detector 16 on the detection surface 1211 have no overlapping area. This arrangement avoids mutual interference between the signals emitted by the first detector 13 and the third detector 16. Moreover, when the controller 14 simultaneously receives all three signals as valid signals, it can be determined that the areas on the detection surface 1211 corresponding to the first detector 13 and the third detector 16 have made contact with the human skin 20. At this time, the contact area between the cooling head 121 and the human skin 20 is large, which indicates that the laser hair removal device 10 has made good contact with the human skin 20, making it suitable to turn on the laser 15 for treatment.

[0052] Optionally, the detection surface 1211 is a ring shape with the ends connected. The total number of the first detector 13 and the third detector 16 is multiple, wherein the first detector 13 includes at least one, the third detector 16 includes at least one, and the orthographic projections of the multiple detectors on the detection surface 1211 are evenly distributed or symmetrically distributed.

[0053] The number of first detectors 13 is at least one, the number of third detectors 16 is at least one, and the sum of the two is multiple. The orthographic projections of all the first detectors 13 and third detectors 16 onto the detection surface 1211 are uniformly distributed on the detection surface 1211, centrally symmetrically distributed with respect to the center point of the detection surface 1211, or symmetrically distributed with respect to the axis of symmetry of the detection surface 1211. Generally speaking, if the total number of first detectors 13 and third detectors 16 is odd, a uniform distribution is preferred; if the total number of first detectors 13 and third detectors 16 is even, either a uniform distribution or a symmetrical distribution is acceptable.

[0054] Optionally, such as Figure 1 As shown, there is one first detector 13 and one third detector 16. The orthographic projections of the first detector 13 and the third detector 16 onto the detection surface 1211 are arranged symmetrically around the center of the detection surface 1211. This arrangement allows for the detection of the contact area between the cooling head 121 and the human skin 20 with the minimum number of detectors, thereby further improving the accuracy and reliability of the pneumatic operation of the laser 15 and the safety of the user.

[0055] For example, with Figure 1Taking the example described above, the detection surface 1211 is rectangular and annular, and the orthographic projections of the first detector 13 and the third detector 16 on the detection surface 1211 are located at two opposite corners of the detection surface 1211.

[0056] In some application scenarios, such as when it is not necessary to detect the entire detection surface 1211 in a diagonal arrangement, the first detector 13 in the laser hair removal device 10 of this application embodiment can be configured to emit only RGB light signals for detecting skin color information. When the detection and output of skin color information are completed, the first detector 13 is turned off, eliminating the need for it to emit a first monochromatic light signal for detection during the treatment phase. When treatment is about to begin, the third detector 16 emits a second monochromatic light signal towards the reflector. The third detector 16 receives a third reflection signal reflected back from the human skin 20 and sends it to the controller 14. The controller 14 determines whether the corresponding position is in contact with the reflector of the physical material by judging the third reflection signal, thereby determining whether it is a valid signal. Simultaneously, after acquiring the contact capacitance signal and determining whether it is a valid signal, the controller 14 sends a control signal to the laser 15 to enter the working state or stop the operation.

[0057] Optionally, the cooling head 121 also has a treatment surface 1212, which adheres to the human skin 20 when the cooling head 121 comes into contact with the human skin 20. The laser emitted by the laser 15 exits from the treatment surface 1212 and is projected onto the human skin 20.

[0058] Furthermore, the detection surface 1211 is arranged around the treatment surface 1212. In this way, after the detection surface 1211 makes large-area contact with the human skin 20, the treatment surface 1212 can also make large-area contact with the human skin 20, thereby improving the treatment effect.

[0059] Both the second detector 122 and the third detector 16 can be electrically connected to a control switch, thereby enabling control via the switch. When the control switch is in the first position, both the second detector 122 and the third detector 16 are off. The first detector 13 emits an RGB light signal towards the human skin 20 and sends the reflected first reflection signal to the controller 14. The controller 14 then obtains the skin color information of the human skin 20 based on the reflected first reflection signal. When the control switch is in the second position, both the second detector 122 and the third detector 16 are on. The first detector 13 emits a first monochromatic light signal towards the human skin 20 and sends the reflected second reflection signal to the controller 14. The third detector 16 emits a second monochromatic light signal towards the human skin 20 and sends the reflected third reflection signal to the controller 14.

[0060] Alternatively, please refer to Figure 1 and Figure 5The laser hair removal device 10 also includes a circuit board 17, on which the first detector 13 and the third detector 16 are both connected and electrically connected to the controller 14.

[0061] Circuit board 17 provides a mounting platform for the first detector 13 and the third detector 16. Simultaneously, the first detector 13 and the third detector 16 can also be electrically connected to the controller 14 via circuit board 17. Circuit board 17 can be fixed within the base 11 using screws, adhesive, snap-fit ​​connections, or welding, and is connected to plug 182 via wire 181. Plug 182 can be electrically connected to the controller 14 via cable assembly 183.

[0062] Optionally, the first detector 13 includes a first light-emitting unit, a first receiving unit, a second receiving unit, and a first signal transmission circuit, wherein the first signal transmission circuit is electrically connected to the first receiving unit, the second receiving unit, and the controller 14, respectively.

[0063] The first light-emitting unit emits an RGB light signal or a first monochromatic light signal to the human skin 20; the first receiving unit receives the first reflected signal and sends it to the controller 14 to obtain the RGB value of the human skin based on the first reflected signal; the second receiving unit receives the second reflected signal reflected back; the first signal transmission circuit sends the first reflected signal or the second reflected signal to the controller 14.

[0064] Before treatment, the first light-emitting unit emits RGB light signals to the human skin 20, and the first receiving unit receives the first reflected signal reflected back by the human skin 20. The first receiving unit sends the first reflected signal to the controller 14, and the controller 14 extracts the RGB value according to the first reflected signal and outputs the skin color information of the human skin according to the RGB value.

[0065] Treatment is about to begin. The first detector 13 switches to the second position, the first light-emitting unit emits a first monochromatic light signal towards the human skin 20, and the second receiving unit receives the second reflected signal reflected back by the human skin 20 and transmits the second reflected signal to the controller 14. When the controller 14 receives the second reflected signal and determines that the second reflected signal is a valid signal, and also receives the contact capacitance signal and determines that it is a valid signal, it sends a control signal to the laser 15 to enter the working state and emit laser light.

[0066] When the laser 15 is ready to operate, it receives a start-up message (such as pressing a button switch) and starts emitting a laser beam, thus initiating treatment.

[0067] After treatment, the operator removes the laser hair removal device so that both the detection surface 1211 and the treatment surface 1212 are no longer in contact with the skin 20. At this point, the feedback signals from the first detector 13, the second detector 122, and possibly the third detector 16 will all show abnormalities, the controller 14 will issue a stop signal, and the laser 15 will immediately stop emitting laser light. Finally, the laser 15 can be turned off by manually operating a button switch.

[0068] Optionally, the circuit board 17 is provided with a capacitor signal circuit and a second signal transmission circuit. The capacitor signal circuit is electrically connected to the cooling head 121, the second detector 122 and the second signal transmission circuit, respectively. The second signal transmission circuit is also electrically connected to the controller 14.

[0069] When the cooling head 121 or the second detector 122 comes into contact with human skin 20, the capacitance increases; when the contact is removed, the capacitance decreases until it reaches zero. The change in capacitance can be converted into a contact capacitance signal by the capacitance signal circuit and transmitted to the controller 14 through the second signal transmission circuit.

[0070] Optionally, the third detector 16 includes a second light-emitting unit, a third receiving unit, and a third signal transmission circuit, wherein the third signal transmission circuit is electrically connected to the third receiving unit and the controller 14, respectively.

[0071] The second light-emitting unit emits a second monochromatic light signal toward the human skin 20; the third receiving unit receives the reflected third signal; and the third signal transmission circuit sends the third reflected signal to the controller 14.

[0072] During treatment, the second light-emitting unit emits a second monochromatic light signal towards the human skin 20, and the third receiving unit receives the third reflected signal reflected back by the human skin 20 and transmits the third reflected signal to the controller 14. When the controller 14 receives the second reflected signal from the first detector 13 and determines it to be a valid signal, receives the third reflected signal from the third detector 16 and determines it to be a valid signal, and receives the contact capacitance signal from the second detector 122 and determines it to be a valid signal, the controller 14 sends a control signal to the laser 15 to enter the working state and emit laser light.

[0073] In addition, to avoid interference from ambient light to the first detector 13 and / or the third detector 16, the laser hair removal device 10 may optionally include a filter 19 disposed on the detection surface 1211 of the cooling head 121. The filter 19 is located on the light output path of the first detector 13 or the third detector 16 and is used to filter out stray light.

[0074] Optionally, the number of filters 19 is equal to the total number of first detectors 13 and third detectors 16, and a filter 19 is provided on the light output path of each first detector 13 and third detector 16, so as to better protect the first detector 13 and third detector 16. Alternatively, the filtering range of the filter 19 covers the light output path of each first detector 13 and third detector 16.

[0075] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A laser hair removal device, characterized in that, include: The system includes a base, a detection component mounted on the base, a first detector, a controller, and a laser, wherein the detection component, the first detector, and the laser are electrically connected to the controller. The first detector emits an RGB light signal toward the reflector to obtain skin color information of human skin based on the first reflected signal, or emits a first monochromatic light signal toward the reflector and receives the second reflected signal to confirm that the detection surface of the first detector has contacted the reflector; the detection component obtains a contact capacitance signal after contacting the reflector to confirm that the contacted reflector is human skin. The controller outputs the received skin color information and determines whether the laser can enter the working state or controls the laser to stop working based on the received second reflection signal and the contact capacitance signal.

2. The laser hair removal device as described in claim 1, characterized in that, The base is provided with control switches that are electrically connected to the detection component and the first detector respectively; when the control switch is in the first position, the detection component is off and the first detector emits the RGB light signal; when the control switch is in the second position, the detection component is on and acquires the contact capacitance signal after contacting the reflector, and the first detector emits the first monochromatic light signal and receives the second reflected signal reflected back.

3. The laser hair removal device as described in claim 1, characterized in that, The detection component includes a cooling head electrically connected to the controller, which transmits the acquired contact capacitance signal to the controller after contacting the reflector; or, the detection component includes a cooling head and a second detector disposed on the cooling head, which is electrically connected to the controller, and transmits the acquired contact capacitance signal to the controller after contacting the reflector.

4. The laser hair removal device as described in claim 1, characterized in that, The detection component has a detection surface, and the laser hair removal device further includes a third detector electrically connected to the controller. The third detector emits a second monochromatic light signal toward the reflector and receives a third reflected signal. The controller determines whether the laser can enter the working state or controls the laser to stop working based on the received second reflected signal, the third reflected signal and the contact capacitance signal. The first monochromatic light signal and the second monochromatic light signal are emitted from the detection surface, and the orthographic projections of the first detector and the third detector on the detection surface have no overlapping area.

5. The laser hair removal device as described in claim 4, characterized in that, The detection surface is a ring shape with the ends connected. The total number of the first detector and the third detector is multiple. The number of the first detector is at least one, and the number of the third detector is at least one. The orthographic projections of the multiple detectors on the detection surface are evenly or symmetrically distributed.

6. The laser hair removal device as described in claim 5, characterized in that, The number of the first detector and the third detector is one, and the orthographic projections of the first detector and the third detector on the detection surface are arranged symmetrically with respect to the center of the detection surface.

7. The laser hair removal device as described in claim 4, characterized in that, The laser hair removal device also includes a circuit board, on which the first detector and the third detector are both connected and electrically connected to the controller.

8. The laser hair removal device as described in claim 1, characterized in that, The first detector includes a first light-emitting unit, a first receiving unit, a second receiving unit, and a first signal transmission circuit, wherein the first signal transmission circuit is electrically connected to the first receiving unit, the second receiving unit, and the controller, respectively. The first light-emitting unit emits the RGB light signal or the first monochromatic light signal toward the reflector; The first receiving unit receives the first reflected signal; the second receiving unit receives the second reflected signal; the first signal transmission circuit sends the first reflected signal or the second reflected signal to the controller.

9. The laser hair removal device as described in claim 4, characterized in that, The third detector includes a second light-emitting unit, a third receiving unit, and a third signal transmission circuit, wherein the third signal transmission circuit is electrically connected to the third receiving unit and the controller, respectively. The second light-emitting unit emits the second monochromatic light signal toward the reflector; the third receiving unit receives the reflected third signal; and the third signal transmission circuit sends the third reflected signal to the controller.

10. The laser hair removal device as described in claim 4, characterized in that, The laser hair removal device also includes a filter disposed on the detection surface, the filter being located on the light output path of the first detector or the third detector.

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