Scanning system and handheld laser hair removal instrument

Abstract

The utility model discloses a scanning system and a handheld laser hair removal instrument, the scanning system comprises a laser, a beam expander and a reflection assembly, the laser comprises a laser bar strip, the laser bar strip is arranged along a first direction, and the laser forms a laser beam with a fast axis direction parallel and a slow axis direction diverging; the beam expander is arranged on one side of the laser, and the extension length of the beam expander in the first direction is larger than or equal to the extension length of the laser beam transmitted to the beam expander in the first direction; the reflection assembly is arranged on the side, away from the laser, of the beam expander, and two first reflectors of the reflection assembly are parallel to each other and extend in the second direction; one edge light beam of the beam expander is reflected to the position near the middle position of the second reflecting end through one first reflecting mirror, and the other edge light beam of the beam expander is reflected to the position near the middle position of the second reflecting end through the other first reflecting mirror. According to the scanning system, uniform target line light spots are obtained, the number of laser bars is reduced, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of laser beauty technology, and particularly to a scanning system and a handheld laser hair removal device. Background Art

[0002] Existing laser hair removal devices form a uniform scanning light spot through the stacking of multiple laser bar strips. However, the stacking of multiple laser light sources increases the production cost of the laser hair removal device and may reduce the number of users. Summary of the Utility Model

[0003] This application provides a scanning system and a handheld laser hair removal device to solve the technical problem that the stacking of multiple laser light sources in existing laser hair removal devices increases their production cost and may reduce the number of users.

[0004] To solve the above technical problem, this application proposes a scanning system, including: a laser, including a laser bar strip, the laser bar strip is arranged along a first direction, and the laser forms a laser beam with a parallel fast axis direction and a divergent slow axis direction; a beam expander, arranged on one side of the laser, and the extension length of the beam expander along the first direction is greater than or equal to the extension length of the laser beam transmitted to the beam expander along the first direction; a reflection component, arranged on the side of the beam expander away from the laser, the reflection component includes two first reflectors, the two first reflectors are parallel to each other and both extend along a second direction, the reflection component includes a first reflection end and a second reflection end arranged oppositely, and the first direction and the second direction are perpendicular; wherein, the light beam at one edge of the beam expander is reflected by one first reflector to a position near the middle of the second reflection end, and the light beam at the other edge of the beam expander is reflected by the other first reflector to a position near the middle of the second reflection end, for forming a uniform target line light spot.

[0005] Wherein, the perpendicular distance between the two first reflectors is a second width, and the second width is the same as the dimension of the target line light spot along the first direction.

[0006] Wherein, the reflection component includes a cuboid light guide column, and first polishing layers are arranged on the opposite two side surfaces of the cuboid light guide column, and the first polishing layers are the first reflectors.

[0007] Wherein, the two first reflectors extend along a third direction; the scanning system further includes a second reflector, the second reflector is inclined and arranged above the first reflection end of the reflection component, for transmitting the laser beam from the second direction to the third direction, wherein the third direction and the second direction are perpendicularly arranged.

[0008] Wherein, an incident angle is formed between the surface of the second reflector and the laser beam transmitted to the second reflector, and the incident angle is greater than or equal to 22 degrees and less than or equal to 68 degrees.

[0009] Among them, the scanning system includes a scanning drive assembly, and the scanning drive assembly drives both the beam expander and the second reflector to move along the second direction, where the beam expander and the second reflector are relatively stationary.

[0010] Among them, the center of the laser bar in the laser, the center of the beam expander, and the center of the reflection assembly are all located in the same plane.

[0011] To solve the above technical problems, the present application proposes a handheld laser hair removal device, including: a housing, an installation cavity provided with a light outlet; the above-mentioned scanning system is arranged in the installation cavity, and the second reflection end of the reflection assembly in the scanning system is arranged at the light outlet.

[0012] Among them, a window piece is further included. The window piece is arranged at the second reflection end and is located at the light outlet. The orthographic projection of the second reflection end on the window piece is located within the window piece. The window piece is provided with second polishing layers on opposite sides along the first direction.

[0013] Among them, the window piece is a sapphire window piece; and / or, the extension length of the window piece along the second direction is greater than or equal to the length of the reflection assembly along the second direction.

[0014] The beneficial effect of the present application is: Different from the prior art, the present application provides a scanning system. The scanning system includes a laser, a beam expander, and a reflection assembly. The laser includes a laser bar. The laser bars are arranged along the first direction. The laser forms a laser beam with a parallel fast axis direction and a divergent slow axis direction. The beam expander is arranged on one side of the laser. The extension length of the beam expander along the first direction is greater than or equal to the extension length of the laser beam transmitted to the beam expander along the first direction. The reflection assembly is arranged on the side of the beam expander away from the laser. The reflection assembly includes two first reflectors. The two first reflectors are parallel to each other and both extend along the second direction. The reflection assembly includes a first reflection end and a second reflection end arranged opposite to each other. The first direction and the second direction are perpendicular. Among them, the light beam at one edge of the beam expander is reflected by one first reflector to a position near the middle of the second reflection end. The light beam at the other edge of the beam expander is reflected by the other first reflector to a position near the middle of the second reflection end, so as to form a uniform target line light spot.

[0015] Compared with the prior art that realizes the homogenization of the line light spot through multiple bar arrays, in this embodiment, a single laser bar is used, and through the mutual cooperation between the beam expander and the two reflectors, a target line light spot that extends along the first direction and is uniform is obtained, which not only reduces the number of laser bars, reduces the production cost, and improves the usage amount of users; moreover, it can effectively shorten the total length of the optical path, compress the overall size of the scanning system, and increase the versatility of the scanning system applied to laser devices. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings, where:

[0017] Figure 1 is the first structural schematic diagram of an embodiment of the scanning system of the present application;

[0018] Figure 2 is the schematic diagram of the structure and energy distribution of an existing laser;

[0019] Figure 3 is the schematic diagram of the structure and energy distribution of the laser, diffuser mirror in the scanning system of the present application;

[0020] Figure 4 is the schematic diagram of the structure and energy distribution of the laser, diffuser mirror and reflection component in the scanning system of the present application;

[0021] Figure 5 is Figure 4 the schematic diagram of the energy distribution shown;

[0022] Figure 6 is the second structural schematic diagram of an embodiment of the scanning system of the application;

[0023] Figure 7 is the partial schematic diagram of an embodiment of the handheld laser hair removal device of the present application;

[0024] Figure 8 is Figure 7 the partial schematic diagram shown.

[0025] Reference numerals in the drawings: 10, scanning system; 11, laser; 12, beam expander; 13, reflection component; 13a, first reflection end; 13b, second reflection end; 131, cuboid light guide column; 132, first reflector; 14, second reflector; 15, scanning drive component; 16, transmission component; 21, housing; 211, light outlet; 212, installation cavity; 213, upper housing; 214, lower housing; 215, air inlet; 22, window piece; 23, button; 24, radiator component; 25, display screen; 100, handheld laser hair removal device. Detailed implementation manners

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0027] As used herein, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase does not necessarily refer to the same embodiment everywhere in the specification, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] The scanning system and the handheld laser hair removal device provided by the present invention will be described in detail below with reference to the embodiments.

[0029] Please refer to Figure 1 and Figure 2 , Figure 1 which is the first structural schematic diagram of an embodiment of the scanning system of the present application; Figure 2 which is the structural schematic diagram of the existing laser and the energy distribution diagram. The present application provides a scanning system 10. The scanning system 10 includes a laser 11. The laser 11 includes a laser bar (not shown in the figure). A laser bar serves as a laser light source. The laser bars are arranged along the first direction X. The laser forms a laser beam with a parallel fast axis direction and a divergent slow axis direction. This laser beam has characteristics such as a parallel fast axis direction and a relatively small divergence angle in the slow axis direction. For example, the divergence angle is greater than or equal to 8° and less than or equal to 10°. The wavelength of this laser beam can be determined as needed and is not limited herein. After the laser beam is transmitted over a certain distance, the size in the fast axis direction remains unchanged, and the size in the slow axis direction continuously expands at the inherent divergence angle of the laser bar, and the energy intensity is Gaussian distribution, as Figure 1 shown.

[0030] Please refer to Figure 3 , Figure 4 and Figure 5 , Figure 3 which is the structural schematic diagram of the laser, the diffusing mirror and their energy distribution in the scanning system of the present application; Figure 4 which is the structural schematic diagram of the laser, the diffusing mirror and the reflection component and their energy distribution in the scanning system of the present application; Figure 5 which is Figure 4 the energy distribution diagram shown. In combination with Figures 1 to 2, the scanning system 10 further includes a beam expander 12. The beam expander 12 is disposed on one side of the laser 11. That is, the beam expander 12 is arranged on the laser beam transmission path. The beam expander 12 can make up for the disadvantage that the divergence angle of the laser bar itself is small and the propagation distance required for expanding to a relatively large laser spot is long. The beam expander 12 can further expand the divergence angle in the slow axis direction of the laser beam, so that the laser spot can be quickly expanded within a limited distance to obtain a target line spot more than twice as large. For example, when the target line spot is 30 mm, the beam expander 12 can quickly expand the laser beam to a laser spot larger than 60 mm. By means of the beam expander 12, the total length of the optical path can be effectively shortened, and the overall size of the scanning system 10 is compressed. Wherein, the extension length of the beam expander 12 along the first direction X is greater than or equal to the extension length of the laser beam transmitted to the beam expander 12 along the first direction X, so that the laser beam output by the laser 11 can enter the beam expander 12.

[0031] The scanning system 10 further includes a reflection assembly 13. The reflection assembly 13 is disposed on the side of the beam expander 12 away from the laser 11. That is, the beam expander 12 is arranged between the laser 11 and the reflection assembly 13. The reflection assembly 13 includes two first reflectors 132. The two first reflectors 132 are parallel to each other. And the two first reflectors 132 are both arranged to extend along the second direction Y. The reflection assembly 13 includes a first reflection end 13a and a second reflection end 13b which are oppositely arranged. The laser beam can be transmitted into the reflection assembly 13 through the first reflection end 13a and transmitted out of the reflection assembly 13 through the second reflection end 13b. The above-mentioned first direction X and second direction Y are perpendicularly arranged. The first direction X can be but is not limited to the front-back direction. The second direction Y can be but is not limited to the left-right direction.

[0032] Wherein, a marginal beam of the beam expander 12 is reflected by one first reflector 132 to a position near the middle of the second reflection end 13b. Another marginal beam of the beam expander 12 is reflected by the other first reflector 132 to a position near the middle of the second reflection end 13b. The position near the intersection of the central axes of the two first reflectors 132 and the second reflection end 13b is defined as the spot center point A. That is, the marginal rays of the beam expander 12 are exactly filled to the spot midpoint position after passing through the two first reflectors 132, for forming a uniform target line spot. The target line spot extends along the first direction X.

[0033] Compared with the prior art in which the line spot uniformity is achieved by stacking multiple laser bars, in this embodiment, through the mutual cooperation among a single laser bar, the beam expander 12 and the two first reflectors 132, a target line spot extending along the first direction X and being uniform is obtained, which not only reduces the number of laser bars, lowers the production cost, and improves the usage quantity of users; moreover, it can effectively shorten the total length of the optical path, compress the overall size of the scanning system 10, and increase the versatility of the scanning system 10 applied in a laser device (not shown in the figure).

[0034] The above-mentioned laser 11 is an independently packaged laser sub-module (not shown in the figure). The front end of the laser sub-module is a laser output window (not shown in the figure) for emitting laser beams. The back end of the laser sub-module is connected to positive and negative electrodes. Inside the laser sub-module, it can be a single laser bar packaged, and after being collimated by a fast-axis collimator (not shown in the figure), the laser bar forms a laser beam with the fast-axis direction parallel and a certain divergence angle in the slow-axis direction. The laser chip (not shown in the figure) is partially packaged and then sealed to ensure the service life of the laser 11. The laser bar can be, but is not limited to, 10 mm, etc.

[0035] In some embodiments, the vertical distance between the two first reflectors 132 is the second width H. The two first reflectors 132 have the same extension length along the second direction Y. The second width H is the shortest distance between the two first reflectors 132. Among them, the second width H is the same as the size of the target line spot along the first direction X. In this way, the marginal light beam of the beam expander 12 is exactly filled to the position of the spot center point A, thereby further improving the uniformity of the target line spot.

[0036] For example, when the size of the target line spot along the first direction X in the scanning system 10 is 30 mm, the second width H can be 30 mm, just as in this embodiment. When the size of the target line spot along the first direction X in the scanning system 10 is 40 mm, the second width H can be 40 mm. That is, the size of the second width H is the same as the size of the target line spot along the first direction X, and its specific value can be determined according to actual needs and is not limited here.

[0037] During the installation of the above two first reflectors 132, sufficient stability needs to be ensured. Therefore, additional components or structures are required for fixation, increasing the production cost of the scanning system 10 and making the internal structure of the scanning system 10 more complex. In order to simplify the structure of the scanning system 10 itself, the reflection assembly 13 further includes a cuboid light guide column 131. The first polishing layers (not shown in the figure) are provided on the opposite side surfaces of the cuboid light guide column 131. The first polishing layer is the first reflector 132. The cuboid light guide column 131 includes the above-mentioned first reflection end 13a and the second reflection end 13b arranged oppositely. The first polishing layer can play a total reflection role. By providing two first polishing layers on the cuboid light guide column 131, not only the uniformity of the target line spot is realized, but also the components can be reduced and the structure can be simplified, and at the same time, the sealing performance of the optical path transmission can be improved.

[0038] The above first polishing layer may but is not limited to a polishing process. The cuboid light guide column 131 is processed from optical glass material. In addition, an anti-reflection film (not shown in the figure) is provided on the first reflection end 13a and / or the second reflection end 13b. The anti-reflection film can increase the transmittance of the required laser beam wavelength. For example, the anti-reflection film is used for the laser beam in the 808nm band to pass through.

[0039] In some embodiments, the two first reflectors 132 are arranged to extend along the third direction Z. The two first reflectors 132 are spaced apart along the first direction X. The third direction Z and the second direction Y are perpendicularly arranged. For example, the third direction Z may but is not limited to the up and down direction. The second direction Y may but is not limited to the left and right direction. In this embodiment, the third direction Z is the up and down direction.

[0040] The scanning system 10 further includes a second reflector 14. The second reflector 14 is obliquely arranged above the first reflection end 13a of the reflection component 13. The second reflector 14 is used to transmit the laser beam from the second direction Y to the third direction Z, thereby changing the transmission direction of the laser beam. By changing the extension direction of the two first reflectors 132 and the setting position of the second reflector 14, the transmission path of the laser beam is changed, thereby changing the position of the second reflection end 13b of the reflection component 13, so as to expand the application range of the scanning system 10 in laser devices.

[0041] When the third direction Z is the up and down direction, the second reflection end 13b of the reflection component 13 may be located at a position below the reflection component 13; or, the second reflection end 13b of the reflection component 13 may be located at a position above the reflection component 13. That is, the position of the second reflection end 13b can be determined according to requirements and is not limited herein. In this embodiment, the second reflection end 13b of the reflection component 13 is located at a position below the third direction Z, changing the laser beam transmitted in the left and right direction to the up and down direction.

[0042] Please refer to Figure 6 , Figure 6 which is the second structural schematic diagram of an embodiment of the application scanning system. Combining Figure 1 , Figures 3 to 5 , in some embodiments, an incident angle α is formed between the surface of the second reflector 14 and the laser beam transmitted to the second reflector 14. The incident angle α is greater than or equal to 22 degrees and less than or equal to 68 degrees. By limiting the above range of the incident angle α, it is ensured that at least part of the laser beam is located within the reflection component 13, realizing the uniformity of the target line light spot.

[0043] Specifically, the incident angle may but is not limited to 22 degrees, 22.5 degrees, 25 degrees, 27 degrees, 30 degrees, 35 degrees, 40 degrees, 42 degrees, 45 degrees, 50 degrees, 60 degrees, 65 degrees, and 68 degrees, etc. In this embodiment, the incident angle α is 45 degrees.

[0044] Please refer to Figure 7 and Figure 8 , Figure 7 which is a partial schematic diagram of an embodiment of the handheld laser hair removal device of the present application; Figure 8 is Figure 7 the partial schematic diagram shown. Combining Figure 1 , Figures 3 to 5 , in some embodiments, the scanning system 10 includes a scanning driving component 15. The scanning driving component 15 drives both the beam expander 12 and the second reflector 14 to move along the second direction Y. Wherein, the beam expander 12 and the second reflector 14 are relatively stationary. The scanning driving component 15 is used to provide a driving force to make the beam expander 12 and the second reflector 14 move relatively along the second direction Y together, realizing the function of target line spot scanning, so as to obtain a rectangular uniform scanning spot.

[0045] By using a single laser bar as the laser light source, a uniform target line spot is obtained through the beam expander 12 and the reflection component 13. Further, through the second reflector 14 and the beam expander 12 moving along the second direction Y simultaneously under the scanning driving component 15, the uniform target line spot forms a rectangular uniform scanning spot, increasing the uniformity of the scanning spot and the area of the scanning spot. Thus, in the case of the uniformity of the target line spot, the rectangular scanning spot is also uniform, enabling the scanning system 10 to obtain a uniform and large-area scanning spot.

[0046] For example, when the size of the target line spot along the first direction X is 30 mm, when the scanning driving component 15 drives the beam expander 12 and the second reflector 14 to move 10 mm along the second direction Y, the size of the rectangular uniform scanning spot is 10 mm × 30 mm. When the size of the target line spot along the first direction X is 40 mm, when the scanning driving component 15 drives the beam expander 12 and the second reflector 14 to move 20 mm along the second direction Y, the size of the rectangular uniform scanning spot is 20 mm × 40 mm. The moving distance of the beam expander 12 and the second reflector 14 along the second direction Y can be determined according to actual needs and is not limited herein.

[0047] In a specific embodiment, the scanning drive assembly 15 can directly drive the beam expander 12 and the second reflector 14 simultaneously, so that the beam expander 12 and the second reflector 14 move along the second direction Y simultaneously. Alternatively, in another specific embodiment, the scanning drive assembly 15 indirectly drives the beam expander 12 and the second reflector 14 simultaneously. For example, the scanning system 10 further includes a transmission assembly 16. The transmission assembly 16 is connected to the beam expander 12 and the second reflector 14 simultaneously. The scanning drive assembly 15 is connected to the transmission assembly 16. That is, the scanning drive assembly 15 acts on the transmission assembly 16, so that the transmission assembly 16 drives the beam expander 12 and the second reflector 14 to move simultaneously. Alternatively, in another alternative embodiment, there are two scanning drive assemblies 15, and the two scanning drive assemblies 15 are respectively independently connected to the beam expander 12 and the second reflector 14, and the two scanning drive assemblies 15 just need to move synchronously. Alternatively, there are two scanning drive assemblies 15 and two transmission assemblies 16. One scanning drive assembly 15, one transmission assembly 16 and the beam expander 12, and the other scanning drive assembly 15, the other transmission assembly 16 and the second reflector 14 move synchronously respectively. The above scanning drive assembly 15 can be, but is not limited to, a drive motor.

[0048] In some embodiments, the beam expander 12 is a bi-concave cylindrical mirror (not shown in the figure). The radius of curvature of the bi-concave cylindrical mirror is greater than or equal to 10 millimeters. By limiting the type of the beam expander 12 and the size of the radius of curvature, the beam transmission path can be shortened, etc., thereby reducing the overall volume of the scanning system 10. Specifically, the radius of curvature of the bi-concave cylindrical mirror can be, but is not limited to, 10 millimeters, 11 millimeters, 12 millimeters, 13 millimeters, 14 millimeters, 15 millimeters, 16 millimeters, 17 millimeters, 18 millimeters, etc. In this embodiment, the radius of curvature of the bi-concave cylindrical mirror is 14 millimeters.

[0049] In some embodiments, the center of the laser bar in the laser 11, the center of the beam expander 12, and the center of the reflection assembly 13 are all located in the same plane. Through the above limitation, the uniformity of the target line light spot is improved.

[0050] The principle of laser hair removal is that melanin in hair is very sensitive to light with a wavelength of 808 nm. The laser device irradiates the laser light with a wavelength of 808 nm onto the skin surface of the human body. The laser can directly penetrate the skin and reach the root of the hair follicle, without burning the skin or affecting the sweat gland secretion. According to the principle of photothermal science, the laser with a specific wavelength and energy is absorbed by melanin and converted into heat energy, heating the melanin and diffusing it to the entire hair follicle, precisely destroying the hair follicle without causing damage to the adjacent tissues, so that the hair loses the ability to regenerate, achieving the effect of permanent hair removal. Its main application scenarios are hair removal on parts of the human body such as the armpits and legs, making the skin look smoother. Generally speaking, the spot size of the laser device determines the hair removal efficiency, and the uniformity of the spot affects the physical feeling and hair removal quality. Therefore, laser hair removal should develop in the technical direction of a relatively larger area and a uniform light spot.

[0051] The scanning system 10 can be applied to a laser device. The laser device can be, but is not limited to, a large-scale laser hair removal instrument (not shown in the figure) and a handheld laser hair removal device (not shown in the figure), etc. The scanning system 10 can be set in the corresponding laser device according to different requirements. Hereinafter, the application of the scanning system 10 to a handheld laser hair removal device 100 will be elaborated in detail.

[0052] Please refer to Figure 1 、 Figure 3 and Figure 8 , this application provides a handheld laser hair removal device 100. The handheld laser hair removal device 100 includes a housing 21 and a scanning system 10. The housing 21 is provided with an installation cavity 212 for an outgoing light port 211. The outgoing light port 211 is communicated with the installation cavity 212. The outgoing light port 211 can be located at the lower part of the housing 21. The scanning system 10 is arranged in the installation cavity 212. The second reflection end 13b of the reflection component 13 in the scanning system 10 is arranged at the outgoing light port 211. The light beam of the scanning system 10 is transmitted to the outside of the housing 21 through the outgoing light port 211.

[0053] Through the above scanning system 10, the handheld laser hair removal device 100 can not only obtain a uniform and large-area scanning light spot; but also reduce the production cost and increase the number of users; at the same time, it can effectively shorten the total length of the optical path, etc., reduce the volume of the scanning system 10, and then reduce the volume of the handheld laser hair removal device 100, which is convenient for carrying, etc.; in addition, the scanning system 10 can also be integrated in a handpiece (not shown in the figure), etc. The above handheld laser hair removal device 100 can be applied to hair removal treatments in families and small medical beauty institutions.

[0054] In some embodiments, the handheld laser hair removal device 100 further includes a window sheet 22. The window sheet 22 is arranged at the second reflection end 13b; at the same time, the window sheet 22 is located at the outgoing light port 211. The orthographic projection of the second reflection end 13b on the window sheet 22 is located within the window sheet 22 to ensure that the laser beam in the reflection component 13 passes through the window sheet 22 smoothly. The window sheet 22 is provided with a second polishing layer (not shown in the figure) on opposite sides along the first direction X. The second polishing layer can play a total reflection role. The window sheet 22 can be used as an extension part of the reflection component 13 to ensure the uniformity of the laser light spot at the outgoing light port 211 and also improve the sealing of the optical path transmission.

[0055] The above second polishing layer can be, but is not limited to, a polishing process. An anti-reflection film, etc. can also be provided at the upper end and / or lower end of the window sheet 22. When the reflection component 13 is a cuboid light guide column 131, the window sheet 22 can be used as an extension part of the cuboid light guide column 131. Among them, the height dimension of the window sheet 22 can be, but is not limited to, 2 mm, 3 mm, 4 mm, 5 mm, etc.

[0056] In some embodiments, the window piece 22 can have an effect of ice point hair removal. For example, the window piece 22 is a sapphire window piece (not shown in the figure). The sapphire window piece can be processed from sapphire. The sapphire window piece has a heat conduction and refrigeration function, and its edge part is connected to a refrigeration component (such as a cooler). By utilizing the high thermal conductivity of the sapphire window piece, the temperature of the sapphire window piece is maintained at a relatively low level, achieving the ice point hair removal effect and enhancing the user experience.

[0057] In some embodiments, the length of the window piece 22 extending along the second direction Y is greater than or equal to the length of the reflection component 13 along the second direction Y, which can increase the area of the ice point hair removal effect. Among them, the length of the window piece 22 extending along the first direction X can be equal to the length of the reflection component 13 along the first direction X.

[0058] In some embodiments, a light outlet 211 is provided below the front part of the housing 21. The window piece 22 is arranged near the light outlet 211 in the installation cavity 212. A power adapter connection port is provided at the rear part of the housing 21. A button 23 is provided on the top of the housing 21 for starting and stopping, gear adjustment, etc. The housing 21 is provided with an air inlet 215 and an air outlet (not shown in the figure). The air inlet 215 and the air outlet are conducive to realizing air convection. A support structure (not shown in the figure) is arranged inside the housing 21 for installing and fixing the internal scanning system 10, etc. The above-mentioned housing 21 includes an upper housing 213 and a lower housing 214. The upper housing 213 and the lower housing 214 are detachably connected.

[0059] In some embodiments, the handheld laser hair removal device 100 further includes a radiator assembly 24. The radiator assembly 24 is used for dissipating heat from the laser 11 and the window piece 22, etc. The laser 11 is directly installed on the radiator assembly 24. The heat generated by the laser 11 can be directly transferred to the radiator assembly 24. One end of a highly thermally conductive copper sheet (not shown in the figure) is arranged around the window piece 22. The other end of the highly thermally conductive copper sheet is connected to the radiator assembly 24, and the heat of the window piece 22 is transferred to the radiator assembly 24 through the thermally conductive copper sheet for continuously cooling the window piece 22 to achieve the ice point effect.

[0060] Specifically, the radiator assembly 24 includes a radiator (not shown in the figure) and a fan component (not shown in the figure). The radiator is provided with a plurality of fins (not shown in the figure). A fan is installed below the radiator. Forced convection heat dissipation is realized by the rotation of the fan.

[0061] In some embodiments, the handheld laser hair removal device 100 further includes a control board. The control board is used for functions such as current drive and distribution, motor motion control, overheat protection, overcurrent and overvoltage protection, skin recognition, etc. The button 23 drives the control board to send start-stop or shift signals, thereby controlling the operation and dormancy of the handheld laser hair removal device 100, etc. The handheld laser hair removal device 100 further includes a display screen 25. The display screen 25 is arranged on the top of the housing 21.

[0062] The terms "first", "second", and "third" in this application are for descriptive purposes only and should not be construed as indicating the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. All directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include unlisted steps or units, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0063] The above are only embodiments of this application, and do not limit the patent scope of this application. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of this application.

Claims

1. A scanning system, characterized in that, Comprising: A laser, including a laser bar, the laser bar being arranged along a first direction, and the laser forming a laser beam with a parallel fast axis direction and a divergent slow axis direction; A beam expander, arranged on one side of the laser, and the extension length of the beam expander along the first direction being greater than or equal to the extension length of the laser beam transmitted to the beam expander along the first direction; A reflection component, arranged on the side of the beam expander away from the laser, the reflection component including two first reflectors, the two first reflectors being parallel to each other and both extending along a second direction, the reflection component including a first reflection end and a second reflection end arranged oppositely, and the first direction and the second direction being perpendicular; Wherein, the light beam at one edge of the beam expander is reflected by one first reflector to a position near the middle of the second reflection end, and the light beam at the other edge of the beam expander is reflected by the other first reflector to a position near the middle of the second reflection end, for forming a uniform target line light spot.

2. The scanning system according to claim 1, wherein The perpendicular distance between the two first reflectors is a second width, and the second width is the same as the dimension of the target line light spot along the first direction.

3. The scanning system according to claim 1, wherein The reflection component includes a cuboid light guide column, and first polishing layers are arranged on opposite two side surfaces of the cuboid light guide column, and the first polishing layers are the first reflectors.

4. The scanning system according to claim 1, wherein The two first reflectors extend along a third direction; The scanning system further includes a second reflector, the second reflector being obliquely arranged above the first reflection end of the reflection component, for transmitting the laser beam from the second direction to the third direction, wherein the third direction and the second direction are perpendicularly arranged.

5. The scanning system according to claim 4, wherein An incident angle is formed between the surface of the second reflector and the laser beam transmitted to the second reflector, and the incident angle is greater than or equal to 22 degrees and less than or equal to 68 degrees.

6. The scanning system according to claim 4, wherein The scanning system includes a scanning driving component, the scanning driving component driving both the beam expander and the second reflector to move along the second direction, wherein the beam expander and the second reflector are relatively stationary.

7. The scanning system according to claim 1, wherein The center of the laser bar in the laser, the center of the beam expander, and the center of the reflection component are all located in the same plane.

8. A handheld laser hair removal device, characterized in that, Comprising: A housing, provided with an installation cavity for a light outlet; The scanning system according to any one of claims 1 to 7, arranged in the installation cavity, and the second reflection end of the reflection component in the scanning system is arranged at the light outlet.

9. The handheld laser hair removal device according to claim 8, wherein Further included is a window plate, the window plate being arranged at the second reflection end and located at the light outlet, the orthographic projection of the second reflection end on the window plate being located within the window plate, and second polishing layers being arranged on opposite two sides of the window plate along the first direction.

10. The handheld laser hair removal device according to claim 9, characterized in that, The window plate is a sapphire window plate; And / or, the extension length of the window plate along the second direction is greater than or equal to the length of the reflection component along the second direction.

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