HAIR REMOVAL DEVICE

Abstract

A hair removal device includes a main control board and a light source assembly. The light source assembly comprises a light source electrically connected to the main control board, a reflector housing the light source and providing a light outlet, and a lens located in front of the light source within the reflector. A head of the device is provided with a light window; the reflector has a parabolic inner wall; the light source is located on a focus line of the parabolic inner wall of the reflector; and an optical path of the hair removal device is that: light generated by the light source is reflected by the parabolic inner wall of the reflector or refracted by the lens to form a parallel light beam, and the parallel light beam is emitted through the light outlet toward the light window, irradiating skin outside the light window.

Claims

1. A hair removal device comprising: a main control board; and a light source assembly, comprising: a light source electrically connected to the main control board; a reflector housing the light source and providing a light outlet; and a lens located in front of the light source within the reflector; wherein a head of the device is provided with a light window; the reflector has a parabolic inner wall; the light source is located on a focus line of the parabolic inner wall; and an optical path of the hair removal device is that: light generated by the light source is reflected by the parabolic inner wall of the reflector or refracted by the lens to form a parallel light beam, and the parallel light beam is emitted through the light outlet toward the light window, irradiating skin outside the light window.

2. The hair removal device of claim 1, wherein the light source is a halogen lamp.

3. The hair removal device of claim 2, wherein a cross-section of the parabolic inner wall of the reflector corresponds to a parallel light parabola line that light originating from a focus point F on the focus line will be reflected as parallel rays; the halogen lamp is located on the focus line, thereby the light generated by the halogen lamp is incident on the parabolic inner wall, and reflected light is emitted along a central axis of the parallel light parabola line.

4. The hair removal device of claim 3, wherein the parabolic inner wall of the reflector includes an upper part and a lower part relative to the halogen lamp, the upper part and the lower part are symmetric with respect to the central axis of the parallel light parabola line and located on an upper side and a lower side of the halogen lamp, and the lens is located in front of the halogen lamp and between the upper part and the lower part; a height of the lens is adapted to a height of the halogen lamp.

5. The hair removal device of claim 4, wherein the reflector further includes an upper horizontal inner wall and a lower horizontal inner wall; the upper horizontal inner wall extends forward following the upper part, the lower horizontal inner wall extends forward following the lower part of the parabolic inner wall; a light outlet channel inside the reflector is defined between the upper horizontal inner wall and the lower horizontal inner wall; terminals of the upper horizontal inner wall and the lower horizontal inner wall therebetween define the light outlet of the reflector; the upper horizontal inner wall and the lower horizontal inner wall are symmetric with respect to the central axis of the parallel light parabola line and parallel to each other; light generated by the halogen lamp directed toward the upper part and the lower part on both sides is reflected, and the reflected light is emitted parallel to the central axis; the light directed toward the lens in a middle is refracted by the lens and emitted parallel to the central axis, thereby the light generated by the halogen lamp is reflected by the parabolic inner wall of the reflector and refracted by the lens to form a concentrated parallel light beam, which is emitted toward the light outlet along the light outlet channel inside the reflector.

6. The hair removal device of claim 4, wherein the reflector comprises an arc-shaped top wall connected between the upper part and a lower part of the parabolic inner wall; the arc-shaped top wall is adapted to the halogen lamp and accommodates a rear side of the halogen lamp; and the reflector is integral.

7. The hair removal device of claim 3, wherein coordinates of each point on the parallel light parabola line are calculated by following equations: $X=5T$ $Y=\mathrm{sqrt}\left(22b5T\right)=\mathrm{sqrt}\left(20\mathrm{bT}\right)$ $Z=0$ wherein: X, Y, Z respectively represent three-dimensional coordinate axes; 5*T represents a variable in the X-axis; the X-axis is located on the central axis; b represents a distance between the focus point F and a directrix P of the parallel light parabola line; an intersection point of the directrix P and the X-axis corresponds to a vertex of the parallel light parabola line, the focus point F is located on the X-axis; and the lens is perpendicular to the X-axis and is vertically symmetric with respect to the X-axis.

8. The hair removal device of claim 2, wherein the halogen lamp includes a filament and a transparent lampshade, and the filament is located on the focus line of the parallel light parabola line; electrodes are connected to both ends of the filament, electrode plates are provided at both external ends of the halogen lamp, the electrodes of the filament are respectively electrically connected to the electrode plates, and are electrically connected to the main control board through the electrode plates.

9. The hair removal device of claim 2, wherein the light source assembly further includes an optical filter, and the light generated by the halogen lamp is filtered by the optical filter to obtain light of a predetermined wavelength bands to irradiate the skin.

10. The hair removal device of claim 9, wherein the optical filter is arranged at the light outlet of the reflector, and the optical filter is also used to filter out ultraviolet light contained in a spectrum of the light generated by the halogen lamp.

11. The hair removal device of claim 1, comprising a housing and a fan, wherein the main control board, the light source assembly and the fan are arranged in the housing; the housing is provided with a plurality of vents serving as air inlets and air outlets, and the hair removal device dissipates heat through a first airflow path and/or a second airflow path; where the heat dissipation through the first airflow path is performed that: the reflector is provided with an air inlet and an air outlet, which are in airflow communication with a space inside the reflector to form an airflow path of the reflector; the air inlet of the housing, an airflow path of the fan, the airflow path of the reflector, and the air outlet of the housing are in airflow communication to form the first airflow path; when the hair removal device is in operation, under the action of the fan, external air is sucked in from the air inlet of the housing, enters the airflow path of the reflector through the airflow path of the fan, transfers heat of the halogen lamp and the reflector, and then is discharged out through the air outlet of the housing, thereby performing heat dissipation for the halogen lamp inside the reflector; the heat dissipation through the second airflow path is performed that: a heat sink is connected to the reflector for transferring heat from the reflector and have an airflow path in airflow communication with the airflow path of the fan; the air inlet of the housing, the airflow path of the fan, the airflow path of the reflector's heat sink, and the air outlet of the housing are in airflow communication to form the second airflow path; when the hair removal device is in operation, under the action of the fan, external air is sucked in from the air inlet of the housing, enters the airflow path of the reflector's heat sink through the airflow path of the fan, transfers heat of the halogen lamp and the reflector, and then is discharged out through the air outlet of the housing, thereby performing heat dissipation for the reflector and thus dissipating heat from the halogen lamp.

12. The hair removal device of claim 11, wherein the light window is formed by a transparent part fixed by a front shell of the head; the light window is cooled by a Peltier cooler; the Peltier cooler includes an intermediate layer of alternating p-type and n-type semiconductor pillars, and hot and cold sides at opposite sides of the intermediate layer.

13. The hair removal device of claim 12, wherein the Peltier cooler includes a pair of positive and negative electrodes for electrically connecting a circuit of the Peltier cooler to a main control unit; the Peltier cooler includes a temperature sensor, and the temperature sensor includes positive and negative electrodes, which are connected to the main control unit; the temperature sensor transmits temperature data to the main control unit, and the main control unit controls a power supply to the Peltier cooler according to the temperature data; the temperature sensor is placed inside the Peltier cooler to detect the temperature of the cold side or the hot side, or the temperature sensor is placed outside the Peltier cooler to detect the temperature of external components; the main control unit is integrated on the main control board or provided on an independent control board, and the independent control board is electrically connected to the main control board.

14. The hair removal device of claim 12, wherein the cold side of the Peltier cooler is connected to the light window of the transparent part to cool the light window; or, the transparent part services as the cold side of the Peltier cooler; or, the Peltier cooler is thermally connected to the transparent part through a heat transfer member; the heat transfer member includes one or more of: a heat conduction plate or heat conduction tube made of heat conduction material, a heat pipe, a vapor chamber, a super heat pipe, and a super vapor chamber; the hot side of the Peltier cooler is one of a heat conduction plate or heat conduction tube made of heat conduction material, a heat pipe, a vapor chamber, a super heat pipe, and a super vapor chamber.

15. The hair removal device of claim 12, wherein another heat sink is installed in the housing for dissipating heat from the hot side of the Peltier cooler; the heat sink of the Peltier cooler is installed between the air inlet of the housing and the fan, and external air is sucked in through the air inlet of the housing, then flows into an airflow path of the heat sink of the Peltier cooler for transferring heat from the hot side of the Peltier cooler and then flows into the airflow path of the fan, and then merges into the first airflow path and/or the second airflow path.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0008] FIG. 1 is an exploded view of the hair removal device according to a first embodiment of the present invention;

[0009] FIG. 2 is a cross-sectional view of the hair removal device according to the first embodiment of the present invention;

[0010] FIG. 3 illustrates an internal structure of the hair removal device according to a second embodiment of the present invention;

[0011] FIG. 4 illustrates an internal structure of the hair removal device according to a third embodiment of the present invention;

[0012] FIG. 5 is a cross-sectional view of the hair removal device according to the third embodiment of the present invention;

[0013] FIG. 6 is a cross-sectional view of the reflector of the hair removal device according to the embodiments of the present invention;

[0014] FIG. 7 illustrates a design principle of the reflector of the hair removal device according to the embodiments of the present invention;

[0015] FIG. 8 illustrates a halogen lamp of the hair removal device according to the present invention;

[0016] FIG. 9 illustrates another halogen lamp of the hair removal device according to the present invention;

[0017] FIG. 10 illustrates a first example of the Peltier cooler cooling the light window of the transparent part of the hair removal device, where (a) is a cross-sectional view of the Peltier cooler cooling the light window of the transparent part, and (b) illustrates an internal structure of the Peltier cooler;

[0018] FIG. 11 illustrates a second example of the Peltier cooler cooling the light window of the transparent part of the hair removal device, where (a) is a cross-sectional view of the Peltier cooler cooling the light window of the transparent part, and (b) illustrates an internal structure of the Peltier cooler;

[0019] FIG. 12 illustrates a third example of the Peltier cooler cooling the light window of the transparent part of the hair removal device, where (a) is a cross-sectional view of the Peltier cooler cooling the light window of the transparent part, and (b) illustrates an internal structure of the Peltier cooler;

[0020] FIG. 13 illustrates a fourth example of the Peltier cooler cooling the light window of the transparent part of the hair removal device, where (a) is a cross-sectional view of the Peltier cooler cooling the light window of the transparent part, and (b) illustrates an internal structure of the Peltier cooler;

[0021] FIG. 14 illustrates a fifth example of the Peltier cooler cooling the light window of the transparent part of the hair removal device, where (a) is a cross-sectional view of the Peltier cooler cooling the light window of the transparent part, and (b) illustrates an internal structure of the Peltier cooler; and

[0022] FIG. 15 illustrates a sixth example of the Peltier cooler cooling the light window of the transparent part of the hair removal device, where (a) is a cross-sectional view of the Peltier cooler cooling the light window of the transparent part, and (b) illustrates an internal structure of the Peltier cooler.

DETAILED DESCRIPTION OF THE INVENTION

[0023] The following will describe the exemplary embodiments of the present invention in more detail with reference to the accompanying drawings. Although the accompanying drawings show the exemplary embodiments of the present invention, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described here. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0024] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms a, an and the as used herein can also mean including the plural forms. The terms including, comprising, containing and having are inclusive and thus indicate the existence of the stated features, steps, operations, elements and/or components, but do not exclude the existence or addition of one or more other features, steps, operations, elements, components, and/or combinations thereof. The method steps, processes, and operations described herein are not to be construed as requiring them to be performed in the specific order described or illustrated, unless specifically stated as the execution order. It should also be understood that additional or alternative steps can be used.

[0025] Although the terms first, second, third, etc. can be used herein to describe multiple elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms can only be used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as first, second and other numerical terms do not imply order or sequence when used herein. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0026] For ease of description, spatial relative terms can be used herein to describe the relationship of one element or feature with respect to another element or feature as shown in the figures, such as inner, external, inside, outside, below, under, above, on top of, front, rear, etc. These spatial relative terms are intended to comprise different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as below other elements or features or under other elements or features will then be oriented as above other elements or features or on top of other elements or features. Therefore, the example term below can comprise both upper and lower orientations. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein are interpreted accordingly.

[0027] Referring to FIGS. 1-5, the present invention relates to a hair removal device 1000, comprising a housing, and a light source assembly, a power supply assembly and a main control board 100 installed in the housing to form a main body of the device 1000. A front end face of a head of the main body can directly contact the skin, and is provided with a light window. In an embodiment, the light window is formed by a transparent part 20, and the transparent part 20 is fixed by an annular front shell 102. The light generated by the light source assembly is transmitted to the light window of the transparent part 20 to irradiate the external skin for hair removal treatment. The light source assembly and the power supply assembly are electrically connected to the main control board 100. The housing is provided with a plurality of vents including an air inlet 106 and an air outlet 107, and the housing/main body defines a cavity therein. An airflow path is formed in the main body, which is in airflow communication with the air inlet 106 and the air outlet 107 for heat dissipation. Ambient air or cold air enters the airflow path in the main body from the air inlet 106, transfers heat in the main body, and is discharged out of the main body through the air outlet 107 for heat dissipation. It can be understood that the air inlet 106 and the air outlet 107 can be in various forms, such as gaps between the shells or one or more through holes through the housing, and can be arranged on the same side or different sides of the housing, or the same vent or different vents can be used as the air inlet and the air outlet.

[0028] The housing includes a main shell 101 and a front shell 102 that are fastened to each other, forming the cavity within the housing. The front shell 102 is generally located at a front end of the head, but is not limited to the frontmost position, depending on a specific shape of the main body. A lamp holder bracket 40 is arranged inside the main body, and an internal bracket 103 may also be provided. The brackets 40 and 103 cooperate with the housing to mount various components of the hair removal device. The light source assembly is mounted inside the front end of the main body by the lamp holder bracket 40; the fan 90, a heat sink 33 and the main control board 100 are mounted inside the main body of the device 1000 by the cooperation of the internal bracket 103 and the main shell 101. The main control board 100 is mounted and protected in a cavity formed by the internal bracket 103 and the main shell 101. A button module 104 electrically connected to the main control board 100 is mounted on the housing, which is used for switch control or function setting, etc.

[0029] The lamp holder bracket 40 is disposed inside the front end (head) of the main body of the hair removal device 1000 for mounting the light source assembly. The light source assembly includes a halogen lamp 50, a reflector 80 for mounting the halogen lamp 50, and a lens 60. The halogen lamp 50 is mounted to the lamp holder bracket 40 by the reflector 80. A light outlet channel is formed at one side (such as a front side) of the reflector 80, and the opposite ends(terminals) form an opening as a light outlet of the reflector. A rear side(back) of the reflector 80 is provided with a heat dissipation assembly for dissipating heat from the reflector 80, and the heat dissipation assembly includes a heat-conducting member 81 and/or a heat sink 82. In the first embodiment, the heat dissipation assembly of the reflector includes a heat-conducting member 81 and a heat sink 82. The shape of the front side of the heat-conducting member 81 is adapted to the shape of the rear side of the reflector 80, and is attached to the rear side of the reflector 80 for a rapid heat transfer; the rear side of the heat-conducting member 81 is connected with the heat sink 82, and the heat sink 82 includes a heat-conducting plate and cooling fins on the heat-conducting plate. The heat sink 82 may extend to a vent of the fan 90 to communicate with the airflow path of the fan, and is located in the airflow path inside the housing to facilitate heat dissipation of the light source. The rear side of the heat sink 82 can be configured in an arc shape, which is adapted to a spiral side shell of the fan 90. Air flows into the fan cavity and then flows from the fan vent into the airflow path of the heat sink 82 for heat dissipation. Opposite ends of the halogen lamp 50 are electrically connected to the main control board 100 through electrodes 51 respectively. An optical filter 70 is disposed in an optical path of the light source assembly, which can be arranged at the light outlet of the reflector 80 to filter the light generated by the halogen lamp 50, thereby obtaining light of a predetermined wavelength bands, which is emitted to the light window of the head of the hair removal device to irradiate the external skin.

[0030] The transparent part (the light window) 20 at the front end face of the head of the hair removal device 1000 is fixed by the front shell 102. In some embodiments, the transparent part (such as a transparent crystal) forming the light window is cooled by one or more Peltier coolers 10, or the transparent part (the light window) 20 can be directly used as the cold side of the Peltier cooler 10 to form an ice-cooling effect or a pre-cooling effect on the skin outside the transparent part. Another heat dissipation assembly may be arranged inside the hair removal device 1000 to dissipate heat from the hot side of the Peltier cooler 10. In other embodiments, the Peltier cooler 10 is used to cool a periphery of the transparent part (the light window) 20, and the transparent part is in contact with the skin to form an ice cooling or pre-cooling effect on the skin.

[0031] Referring to FIGS. 1-2, the hair removal device 1000 is provided in accordance with a first embodiment of the present invention, where a back (a rear side) of the transparent part 20 is close to the cold side of an annular Peltier cooler 10, and the annular Peltier cooler 10 is attached around the transparent part 20 to obtain a full-surface (a whole transparent part) cooling effect. The Peltier cooler 10 includes an annular hot side, an annular cold side, and an annular intermediate layer of alternating p-type and n-type semiconductor pillars. For example, the heat dissipation assembly of the Peltier cooler includes an annular heat conduction member 31, a heat pipe 32, and a heat sink 33. A front side of the annular heat conduction member 31 is attached to the hot side of the annular Peltier cooler 10, and its rear side (back) is attached to an annular front end of the heat pipe 32. A rear end of the heat pipe 32 connects the heat sink 33 (for example, the rear end of the heat pipe is inserted through a group of heat dissipation fins). The cold side of the Peltier cooler 10 cools the transparent part 20, and the heat of the hot side of the Peltier cooler 10 is transferred to the heat conduction member 31, then transferred to the heat sink 33 through the heat pipe 32 for heat dissipation.

[0032] In the first embodiment, the heat sink 33 is located behind the air inlet 106 of the housing, and is located between the air inlet 106 and the fan 90. The airflow path of the heat sink 33 is correspondingly connected to the air inlet 106 and a (axial) vent of the fan 90. A first airflow path 110 is formed by the airflow communication between the air inlet 106 of the main body, the airflow path of the heat sink 33, the airflow path of the fan 90 (the airflow path of the fan 90 formed by the airflow communication between one (axial) vent of the fan, the fan cavity, and the other vent (e.g., in the spiral shell) of the fan), a space inside the light source reflector 80 (the space is outside the halogen lamp 50), and the air outlet 107 of the main body. A second airflow path 130 is formed by the airflow communication between the air inlet 106 of the main body, the airflow path of the heat sink 33, the airflow path of the fan (the airflow path formed by the airflow communication between one (axial) vent of the fan, the fan cavity, and the other vent (e.g., in the spiral shell) of the fan), the airflow path of the heat sink 82 of the reflector, and the air outlet 107 of the main body. When the hair removal device 1000 is in operation, under the action of the fan 90, air outside the main body is sucked in from the air inlet 106 and flows into the airflow path of the heat sink 33 to transfer heat of the heat sink 33, so as to dissipate heat from the hot side of the Peltier cooler 10; then the airflow enters the fan cavity, and one stream of airflow flows into the light source reflector 80 through the vent (e.g., in the spiral shell) of the fan 90 to dissipate the heat of the halogen lamp and the reflector, and then flows out of the main body through the air outlet 107 of the housing (main body), that is, the hot side of the Peltier cooler 10 and the halogen lamp 50 are dissipated through the first airflow path 110; at the same time, another stream of the airflow flows into the airflow path of heat sink 82 of the reflector through the vent (e.g., in the spiral shell) of the fan to transfer heat, and then flows out of the main body through the air outlet 107 of the housing, that is, the reflector 80 is dissipated through the second airflow path 130 to further dissipate heat from the halogen lamp 50.

[0033] For the hair removal device 1000 provided in the second embodiment, referring to FIG. 3, the difference in heat dissipation from the first embodiment is that the airflow path 110 is not provided; in the second embodiment, the light source assembly performs heat dissipation through the second airflow path 130.

[0034] For the hair removal device 1000 provided in the third embodiment, referring to FIGS. 4-5, the difference in heat dissipation from the first embodiment is that the second airflow path 130 is not provided; in the third embodiment, the light source assembly performs heat dissipation through the first airflow path 110; in the third embodiment, the light source heat dissipation assembly is not provided, and other aspects are the same as or similar to those of the first embodiment.

[0035] With reference to FIGS. 6-7, the light source assembly of the present invention is converted to a parallel light beam and is emitted to the light window (transparent part 20) of the head of the hair removal device 1000. The light source assembly mainly includes three optical elements: a halogen lamp 50, a reflector 80, and a lens 60, which are designed to cooperate with each other to emit parallel light rays. The halogen lamp 50 is installed in the reflector 80, and the lens 60 is located in front of the halogen lamp 50; the inner wall of the reflector 80 includes a parabolic inner wall 84. The halogen lamp 50, the parabolic inner wall 80 of the reflector, and the lens 60 are designed to cooperate with each other, so that an optical path is as follows: the light generated by the halogen lamp 50 is reflected by the parabolic inner wall 84 of the reflector or refracted by the lens 60 to form a parallel light beam, and the parallel light beam is emitted through the light outlet of the reflector 80 and the transparent part (the light window) 20 to irradiate the skin outside the transparent part (the light window) 20. A cross-sectional shape of the parabolic inner wall 84 of the reflector 80 corresponds to a parabola line (also call parallel light parabola line in the present invention) that light originating from the focus point F of the parabola line will be reflected as parallel rays. The halogen lamp 50 is located on a focus line (the focus line contains all focus point F of the parallel light parabola lines), so that the light generated by the halogen lamp 50 is incident on the parabolic inner wall 84, and the reflected light is emitted along a central axis L of the parallel light parabola line (parabolic inner wall 84). In some embodiments, the parabolic inner wall 84 of the reflector is divided by the halogen lamp 50 into an upper part and a lower part corresponding to the parallel light parabola line. The upper part and the lower part are symmetric about the central axis L of the parallel light parabola line and located on the upper and lower sides of the halogen lamp 50. The lens 60 is located in front of the halogen lamp 50 and between the upper part and the lower part of the parabolic inner wall 84. A height of the lens 60 is adapted to a height of the halogen lamp 50. The upper part and the lower part extend backward to be connected at a peat (vertex) of the parallel light parabola lines (parabolic inner wall 84). A distance between the ends of the upper part and the lower part corresponds to the opening (light outlet) height of the reflector.

[0036] In other embodiments, the reflector 80 further includes upper and lower horizontal inner walls 85; the upper horizontal inner wall extends forward from the upper part, and the lower horizontal inner wall extends forward from the lower part of the parabolic inner wall 84, and a light outlet channel inside the reflector is defined between the upper and lower horizontal inner walls 85; the front opposite ends (terminals) of the upper and lower horizontal inner walls define the light outlet of the reflector 80. The upper and lower horizontal inner walls are symmetric with respect to the central axis L of the parallel light parabola line (parabolic inner wall 84) and parallel to each other. The light generated by the halogen lamp 50 is reflected on both sides by the upper and lower parts 84 of the parabolic inner wall 84, and the reflected light is emitted parallel to the central axis L; the light emitted to the lens 60 in the middle is refracted by the lens 60 and then emitted parallel to the central axis L, too, so that the light generated by the halogen lamp 50 is reflected by the parabolic inner wall 84 of the reflector 80 and refracted by the lens 60 to form a concentrated parallel light beam, which is emitted toward the light outlet along the light outlet channel inside the reflector.

[0037] The inner wall of the reflector 80 serves as a light-reflecting surface and a light-guiding surface, and includes the parabolic inner wall 84 (upper and lower parts, both indicated by 84 in the figures). Preferably, the reflector 80 has a shaped the same as its inner wall; that is, the part of the reflector 80 corresponding to the parabolic inner wall 84 is a parabolic wall, the parts of the reflector 80 corresponding to the upper and lower horizontal inner walls are upper and lower horizontal walls. That is, the reflector 80 includes a parabolic wall 84, and the parabolic wall 84 is divided into the upper part and lower part (both indicated by 84). The reflector 80 includes the parabolic wall 84 and the upper and lower horizontal walls 85 respectively extending from the open ends(terminals) of the parabolic wall 84. That is, the upper horizontal wall 85 extends from the upper part of the parabolic wall 84; and the lower horizontal wall 85 extends from the lower part of the parabolic wall 84.

[0038] The halogen lamp 50 includes a filament 53 and a transparent lampshade 54 (refer to FIGS. 7-8). In this embodiment, the halogen lamp 50 is designed in a shape of a cylindrical lamp tube (but not limited to a cylindrical shape) with a predetermined length (adapted to a length of the reflector 80, referring to FIG. 1). The light generated by the filament is emitted through the transparent lampshade.

[0039] Preferably, the reflector 80 further includes an arc-shaped (not limited to arc-shaped) top wall 83, which is adapted to a shape of the lamp tube and accommodates a rear side of the halogen lamp. The arc-shaped top wall 83 is connected between the upper part and lower part of the parabolic wall 84. The upper and lower part of the parabolic (inner) wall 84 are respectively connected to the upper and lower horizontal (inner) walls 85. The top wall 83, the parabolic wall 84 and the horizontal walls 85 are preferably integrated, smoothly connected and extend forward. The upper part of the parabolic wall 84 connected to the upper horizontal wall 85, and the lower part of the parabolic wall 84 connected to the lower horizontal wall 85 are vertically arranged relative to the horizontal central axis L, and the arc-shaped top wall 83 is connected there between. A distance between the upper and lower horizontal walls 85 (or an opening of the parabolic walls 84) corresponds to the opening (light outlet) height h of the reflector 80. Each (upper or lower) horizontal wall 85 extends forward from the corresponding part (upper or lower pat) of the parabolic wall 84, forming the side walls of the light outlet channel inside the reflector and terminals thereof at a front side form an opening therebetween as the light outlet of the reflector. The opposite ends of the reflector along a length thereof may be closed or open, when open, they can serve as vents, and air flows into the reflector 80 from one open end and flows out from the opposite end to transfer heat of the halogen lamp 50 and the reflector 80. The filament of the halogen lamp 50 is located on the focus line (a line of all the focus points F) of the parabolic wall 84 of the reflector 80. The cross-section of the parabolic wall 84 is a parallel light parabola line. The design principle of the parabola refers to FIG. 7. In the XYZ coordinate system, the origin of the coordinate system is an intersection point of the directrix P of the parabola line and the X-axis (also the horizontal central axis L of the reflector), the focus point of the parabola line is F, and the focus point F is located on the X-axis/horizontal central axis L of the reflector 80. A distance from the focus point F to the directrix P is b. The coordinates of each point on the parallel light parabola line calculated according to equations are:

[00001]$X=5*T$$Y=\mathrm{sqrt}\left(2*2*b*5T\right)=\mathrm{sqrt}\left(20\mathrm{bT}\right)$$Z=0$ [0040] where X, Y, and Z respectively represent three-dimensional axes; 5*T represents a variable (T is a variable related to a length of the parabola) in the X-axis direction, and b represents a distance between the focus point F and the directrix P; the directrix P is located at a starting point (a vertex) of the parabola line. Q (b, 2a) is a point on the parabola line, and b is determined according to a distance from the light source to the light outlet, for example, according to the specific distance required between the light source and the light outlet (or the light window of the hair removal device head) in use. Once the position of the light source is determined, b is determined; as a non-limited example, b=1.5. A terminal 841 of the parabolic wall 84 is determined by a height of the opening (light outlet) of the reflector 80, and a start point 840 of the parabolic wall 84 is determined by a tube height of the halogen lamp 50. The height of the lens 60 is adapted to the tube height of the halogen lamp 50, and its position is determined by the position of the focus point F (filament). The lens 60 is perpendicular to the X-axis and is vertically symmetric with respect to the X-axis. When the light generated by the filament of the halogen lamp 50 is emitted forward (toward the light outlet), the incident light i on both sides is emitted to the parabolic wall 84 to form total internal reflection (TIR) light r, which is parallel to the horizontal central axis L (X-axis) of the reflector 80. The incident light i in the middle is refracted by the lens 60 into horizontal light parallel to the horizontal central axis L (X-axis) and is emitted forward. Therefore, the light generated by the halogen lamp 50 is reflected by the parabolic wall 84 or refracted by the lens 60, converted into a parallel light beam in the horizontal direction and emitted along the light outlet channel (located between the upper and lower horizontal walls 85 of the reflector) toward the opening (light outlet), then filtered by the optical filter 70 at the opening (light outlet) of the reflector 80, and then emitted to the transparent part (the light window) 20 of head of the hair removal device 100 and acts on the external skin, which can be used for hair removal.

[0041] The light source assembly of the present invention uses the parabolic (inner) wall 84 of the reflector in cooperation with the lens 60, so that the light generated by the light source forms a parallel light beam which is emitted toward the light outlet along the light outlet channel in the reflector 80, thereby concentrating the output light of the halogen lamp 50, reducing the refraction of the light in the reflector 80, reducing the loss of light energy, and concentrating the output light to reach the light energy required for hair removal.

[0042] An optical filter 70 is disposed at the opening (light outlet) at the front side of the reflector 80, perpendicular to the light transmission direction. Light generated by the light source 50 is directed parallel to the light outlet along the light outlet channel and filtered by the optical filter 70 to remove ultraviolet light and to obtain desired wavelength bands, thereby preventing ultraviolet light from damaging the skin surface or the user's eyes and performing beauty functions. The light generated by the halogen lamp 50 is close to a full spectrum, including ultraviolet light, which can cause damage to the skin surface and eyes. When the hair removal device 1000 is in operation, the optical filter 70 can be used to filter out light waves below 500 nm or 480 nm, for example.

[0043] Examples of the structure of the halogen lamp 50 are shown in FIGS. 8-9, but are not limited to such structures. As shown in FIG. 8, the halogen lamp 50 is a cylindrical lamp tube, comprising a cylindrical transparent lampshade 54 with a filament therein. The filament is designed to extend to the left and right ends along the length of the halogen lamp 50. The two ends of the filament are located at the opposite ends of the lamp tube and are connected to electrodes 52 respectively. The electrodes 52 are electrically connected to the electrode plates 51 provided on the left and right ends of the lamp tube, thereby electrically connecting to the main control board 100. As shown in FIG. 9, the filament of the halogen lamp 50 is folded back along the length direction of the halogen lamp 50, and an isolation support is provided to support and separate the folded filament. The two ends of the filament are located on the same side and are connected to the electrodes 52 respectively. The electrodes 52 are electrically connected to the two electrode plates 51 provided on the outside of the same side of the lamp tube, and are electrically connected to the main control board 100 through the electrode plates 51.

[0044] The power supply assembly includes a charging base 111 electrically connected to or set on the main control board 100, the charging base 111 is electrically connected to a power cord 105, and the power cord 105 is used to connect to an external power source such as a mobile power supply or a main power. The power supply assembly may also include a battery, for example a rechargeable battery.

[0045] In the hair removal device 1000 of some embodiments, a Peltier cooler 10 is disposed at the head for cooling the end face/the transparent part (the light window) 20, so as to obtain a pre-cool or an ice-cooling effect on the skin in contact. The Peltier cooler 10 can be disposed around the end face/the transparent part to cool the periphery of the transparent part (the light window)20, or disposed behind the transparent part (the light window) 20 to form a full-surface cooling effect, or, the transparent part 20 can be the cold side of the Peltier cooler 100 to form a full-surface cooling effect.

[0046] The Peltier cooler is also called a thermoelectric cooler (TEC) or a heat pump. It includes an intermediate layer 12 of alternating p-type and n-type semiconductor pillars, a hot side 13 and a cold side 11 at opposite sides of the intermediate layer 12, and a pair of positive and negative electrodes 120. The Peltier cooler 10 also includes a built-in or external temperature sensor, and the positive and negative electrodes 120 and the temperature sensor are electrically connected to the main control board 100, an independent control board, or a main control unit to control the temperature of the cold side or the hot side. The intermediate layer 12 is formed by alternately placing p-type and n-type semiconductor pillars parallel to each other and electrically connecting in series. The hot side 13 and the cold side 11 formed at opposite ends of the p-type and n-type semiconductor pillars are heat-conducting material substrates, which can be, for example, ceramic/aluminum/copper/transparent part and other heat-conducting materials, or heat pipes, vapor chamber (VC), Aluminum Vapor Chamber (ALVC), etc. The temperature sensor can be a Negative Temperature Coefficient (NTC) sensor 15.

[0047] In some embodiments, referring to FIGS. 11-15, the temperature sensor, i.e., the NTC sensor 15, is placed inside the Peltier cooler 10. The NTC sensor 15 is attached to the hot side 13/cold side 11 of the Peltier cooler 10 to directly detect the temperature of the cold side 11/hot side 13 of the Peltier cooler.

[0048] Referring to FIG. 10, as a first example, the Peltier cooler 10 is annular and attached behind the transparent part (the light window) 20. The cold side 11 cools the periphery of the transparent part (the light window) 20, forming a full-surface cooling. A light-transmitting area 14 is formed in the central region of the annular Peltier cooler 10. The parallel light beam emitted from the light source assembly passes through the light-transmitting area 14 and the transparent part (the light window) 20, and then irradiates the skin in contact with the outside of the light window to perform hair removal treatment on the skin. The NTC sensor 15 is placed inside the Peltier cooler 10, and the NTC sensor 15 is attached to the hot side 13/cold side 11 of the Peltier cooler 10, directly detecting the temperature of the cold side 11/hot side 13 of the Peltier cooler to obtain precise temperature control.

[0049] Referring to FIG. 11, in a second example, the Peltier cooler 10 has the cold side 11 directly as the transparent part (the light window) 20, and the Peltier cooler 10 may be provided with a light-transmitting area 14. Specifically, the cold side 11 may adopt a transparent crystal, and the light-transmitting area 14 is provided by the transparent crystal. The p-type and n-type semiconductor pillars of the intermediate layer 12 may be arranged in an annular shape with a central area thereof corresponding to the light-transmitting area. In this case, if the hot side 13 is made of a non-transparent material, it can also arranged in an annular shape with a central area thereof corresponding to the light-transmitting area 14; If the hot side is also made of a transparent material, it is not limited to an annular shape, and the light-transmitting area 14 may be formed on the entire surface. The transparent crystal cold side 11 covers the entire surface of the intermediate layer 12. The transparent crystal cold side 11 and the transparent part (the light window) 20 are the same component, which is fixed by the front shell 102 of the hair removal device. The parallel light beam emitted from the light source assembly is transmitted to the transparent part (the light window) 20 and irradiates on the external skin for hair removal treatment. The NTC sensor 15 is placed inside the Peltier cooler 10, and is attached to the hot side 13/cold side 11 to directly detect the temperature of the cold side 11/hot side 13 of the Peltier cooler 10, enabling a precise temperature control.

[0050] In the second example, the hot side 13 is annular and may be a substrate made of a heat-conducting material (such as copper). In another embodiment, the hot side 13 may be a heat pipe, a VC (Vapor Chamber), or an ALVC (Aluminum Vapor Chamber). In another embodiment, the hot side 13 is directly a portion of the outer wall of the heat-conducting member 31, and the heat-conducting member 31 may be a component made of a heat-conducting material (such as copper or aluminum), a heat pipe, a VC, or an ALVC. In another example, when no heat-conducting member 31 is set, the hot side 13 may be a part of a front end wall of the heat pipe 32.

[0051] In the third and fourth examples, referring to FIGS. 12-13, the Peltier cooler 10 includes a transparent crystal cold side 11 and one (as shown in FIG. 12) or more (such as two in FIG. 13) intermediate layers 12 of p-type and n-type semiconductor pillars, where each intermediate layer 12 is connected to a hot side 13 at an side opposite to the transparent crystal cold side 11. Wherein the one or more intermediate layers 12 are arranged on one or more sides of the transparent crystal cold side 11, and other sides of the transparent crystal cold side 11 form the light-transmitting area 14. The transparent crystal cold side 11 and the transparent part (the light window) 20 are the same component. The parallel light beam generated by the light source assembly is emitted to the transparent crystal cold side/transparent part (the light window) 20 and acts on the external skin for hair removal treatment. The NTC sensor 15 is located in the intermediate layer 12 (one or all of the intermediate layers 12) and is attached to the hot side 13/cold side 11 of the Peltier cooler 10 to directly detect the temperature of the cold side 11/hot side 13 of the Peltier cooler 10, so as to obtain a precise temperature control.

[0052] In the fifth to sixth examples, referring to FIGS. 14-15, the entire cold side 11 of the Peltier cooler 10 is used to cool the transparent part (the light window) 20. The p-type and n-type semiconductor pillars are placed on inner surfaces of the cold side 11 and the hot side 13. The shapes of the cold side 11 and the hot side 13 are adapted to each other, and the intermediate layer 12 and the NTC sensor 15 are located between the cold side and the hot side. The NTC sensor 15 is attached to either the hot side 13 or the cold side 11. Positive and negative electrodes 150 of the NTC sensor 15 and Positive and negative electrodes 120 of the intermediate layer 12 extend out of the Peltier cooler 10 to electrically connect the main control board 100. One or more sides of the transparent part (the light window) 20 are set with the Peltier cooler 10, and the cold side 11 is attached to the side surface of the transparent part to cool the light window.

[0053] The working principle of the Peltier cooler 10 is as follows: for the Peltier cooler 10 with a built-in NTC sensor 15, the NTC sensor 15 detects the temperature data of the cold side 11 or the hot side 13 and transmits the temperature data to a main control unit on the main control board; on the basis of temperature data analysis and a predetermined temperature range, the main control unit controls a power supply to the Peltier cooler 10 to realize precise and constant temperature within the expected temperature range. The main control unit may be set on an independent control board to control the operation of the Peltier cooler 10, and the independent control board is electrically connected to the main control board 100 of the hair removal device 1000; alternatively, the main control unit is integrated on the main control board 100 of the hair removal device 1000.

[0054] One or more NTC sensors 15 can be used according to the area and a shape of the Peltier cooler.

[0055] When the temperature sensor is set outside of the Peltier cooler, it can be attached to the transparent part (the light window) 20 to detect the temperature of the end face of the head of the hair removal device, and the detected temperature data is transmitted to the main control unit. After comparing with the predetermined temperature, the power supply to the positive and negative electrodes of the Peltier cooler is controlled.

[0056] In the hair removal device 1000 of the present invention, the light source adopts a halogen lamp 50. The light generated by the halogen lamp is non-intense pulsed light, which is harmless or minimally harmful to the eyes. The halogen lamp does not require 8000V high-voltage triggering, and is safer for use, and it can be powered by a low-voltage direct current (DC), so the device 1000 has a smaller volume and lower cost. The photothermal radiation of light generated by the halogen lamp 50 causes little or no damage to the skin, making it safer to use; the light generated by the halogen lamp light source has a full spectrum band, so the device is more versatile in use in combination with different filter 70 of different wavelength bands.

[0057] The hair removal device 1000 of the present invention has a light source assembly including a convex lens and a reflector with a parabolic inner wall, which concentrates the light from the halogen lamp and reduces the refraction of the light in the reflector; thus reducing energy loss.

[0058] In the hair removal device 1000 of some embodiments, the front end face (in contact with the skin) of the head is cooled by the Peltier cooler 10, and further, the Peltier cooler 10 has a built-in sensor and a precise temperature control is obtained. Combined with the photothermal effect of the halogen lamp light source, the temperature of the skin surface to be hair removed can be precisely controlled within a certain range, thereby achieving a good hair removal effect without burning the skin and wasting energy.

[0059] In other embodiments, the optical filter 70 can be configured to be detachable and replaceable, for example, a slot may be provided to allow the optical filter 70 to be pluggable and replaceable, and multiple optical filters 70 of different wavelength bands are provided for the device 1000. The hair removal device 1000 is equipped with different optical filter 70 of different wavelength bands corresponding to different types of beauty or treatment functions.

[0060] In other embodiments, by externally connecting various accessory heads to the head of the hair removal device, each accessory head is equipped with an optical filter of different wavelength bands, and the main body of the hair removal device can also be used to realize different beauty or therapeutic functions. Alternatively, only one accessory head with a switchable optical filter can be connected to the head of the hair removal device, which can also realize different beauty or therapeutic functions.

[0061] The hair removal device of the present invention can perform a variety of beauty or treatment functions mainly due to the full spectrum produced by the halogen lamp in combination with optical filters of different bands to obtain the output light of different wavelength bands irradiating the skin.

[0062] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features It is considered to be the range described in this specification.

[0063] The above examples only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.