Laser hair removal hand tool

Abstract

The utility model provides a laser depilation hand tool, which is characterized in that a single semiconductor cooler is arranged in the laser depilation hand tool, the single semiconductor cooler is arranged between a water tank and a water cooling plate, the refrigeration surface of the single semiconductor cooler is attached to the bottom of the water tank, and the other surface, far away from the refrigeration surface, of the single semiconductor cooler is attached to the top surface of the water cooling plate; circulating liquid in the water tank is refrigerated by using a cold surface of a single semiconductor refrigerator, then the cooled liquid circulates in a micro-channel in the treatment head, and heat dissipation is performed on the treatment head in a convective heat exchange manner. Due to the fact that heat of the treatment head is cooled through water cooling circulation in the micro-channel, heat radiated to the skin by laser can be rapidly taken away, and the laser hair removal hand tool can achieve a good use effect. In addition, the laser hair removal hand tool cools the treatment head through the cooling liquid refrigerated by the single semiconductor refrigerator, the structure is simple and compact, and the weight of the laser hair removal hand tool is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of beauty instruments, and in particular to a laser hair removal handpiece. Background Art

[0002] A laser hair removal handpiece is part of a handheld laser hair removal machine used for hair removal treatments, also known as a laser treatment handpiece. During treatment, the handpiece's treatment head typically contacts the skin directly, and the laser's radiating light is then transmitted through the handpiece's window. This requires the handpiece to have excellent cooling performance, which eliminates the pain caused by the heat generated by the laser's output during treatment. Conventional laser hair removal handpieces typically utilize multiple semiconductor cooling elements for cooling, which is relatively costly. Utility Model Content

[0003] To address the above-mentioned issues, the present invention provides a laser hair removal handpiece based on microchannel cooling inside a treatment head. In a first aspect, the present invention provides a laser hair removal handpiece comprising: a handpiece housing, a treatment head, a water tank, a single semiconductor cooler, a water cooling plate, and a laser emitting device.

[0004] The treatment head is fixed to one side of the handpiece housing, the water tank and the water-cooling plate are fixed in the handpiece housing, the water tank is in communication with the treatment head, and the water tank contains cooling liquid, which can be circulated between the water tank and the treatment head; a single semiconductor refrigerator is arranged between the water tank and the water-cooling plate, wherein the cooling surface of the single semiconductor refrigerator is in contact with the bottom of the water tank; and the other surface of the single semiconductor refrigerator away from the cooling surface is in contact with the top surface of the water-cooling plate;

[0005] The laser emitting device is arranged on the water-cooling plate and connected to the water-cooling plate by bolts; the light-emitting side of the laser emitting device is spaced apart from the treatment head;

[0006] The treatment head is provided with a plurality of microchannels. The cooling liquid in the water tank first flows into the plurality of microchannels in the treatment head to dissipate heat for the treatment head, and then returns to the water tank from the microchannels in the treatment head.

[0007] In the solution provided in the first aspect of the embodiment of the present application, a single semiconductor cooler is provided in the laser hair removal handpiece, and the single semiconductor cooler is provided between the water tank and the water-cooling plate. The cooling surface of the single semiconductor cooler is in contact with the bottom of the water tank, and the other surface away from the cooling surface is in contact with the top surface of the water-cooling plate. The cold surface of the single semiconductor cooler is used to cool the cooling liquid in the water tank to achieve heat dissipation of the treatment head. Compared with the related art method in which the laser hair removal handpiece uses multiple semiconductor coolers, which results in higher costs, the laser hair removal handpiece is provided with only a single semiconductor cooler for heat dissipation of the treatment head, thereby reducing the cost of the laser hair removal handpiece, making the laser hair removal handpiece simple and compact in structure, and reducing the weight of the laser hair removal handpiece. Moreover, in order to ensure the heat dissipation effect when using a single semiconductor cooler, a plurality of microchannels capable of circulating cooling liquid are provided in the treatment head to increase the contact area between the cooling liquid and the treatment head, thereby increasing the heat dissipation effect of the cooling liquid on the treatment head.

[0008] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0010] Figure 1 A schematic diagram of the internal structure of a laser hair removal handpiece provided in an embodiment of the present application is shown;

[0011] Figure 2 A schematic structural diagram of a treatment head provided in an embodiment of the present application is shown;

[0012] Figure 3 A schematic diagram of the external structure of a water tank provided in an embodiment of the present application is shown;

[0013] Figure 4 1. A front view of a treatment head provided in an embodiment of the present application is shown;

[0014] Figure 5 The embodiment of the present application provides Figure 4 Cross-section view in the AA direction;

[0015] Figure 6 The embodiment of the present application provides Figure 3 Schematic diagram of the BB direction. DETAILED DESCRIPTION

[0016] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0018] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0019] Laser hair removal devices are widely used in the beauty industry. Laser hair removal technology works based on the principle of selective photothermodynamics, emitting a continuous laser beam of a specific wavelength. This laser beam penetrates the skin's surface and reaches the hair follicles at the root. The light energy is absorbed and converted into heat, destroying the follicles. This causes the hair to fall out and lose its ability to regenerate, while sparing surrounding tissue and achieving permanent hair removal.

[0020] A laser hair removal handpiece is part of a handheld laser hair removal machine, also known as a laser treatment handpiece. During treatment, the handpiece's treatment head typically comes into direct contact with the skin, and the laser's light source is transmitted through the treatment head window. This requires excellent cooling performance, which minimizes pain and prevents laser burns.

[0021] In order to ensure the heat dissipation and cooling effect, laser hair removal handpieces generally use multiple semiconductor refrigerators to cool the treatment head and laser emitting device in the laser hair removal handpiece. The price of semiconductor refrigerators is relatively expensive, resulting in a relatively high cost of laser hair removal handpieces, and the need for parallel water circuits makes the internal structure of the laser hair removal handpiece relatively complicated.

[0022] Based on this, the following embodiment of the present application proposes a laser hair removal handpiece, which is provided with a single semiconductor refrigerator in the laser hair removal handpiece, and the single semiconductor refrigerator is provided between a water tank and a water-cooled plate, wherein the cooling surface of the semiconductor refrigerator is in contact with the bottom of the water tank; the other surface of the semiconductor refrigerator away from the cooling surface is in contact with the top surface of the water-cooled plate; the cold surface of the single semiconductor refrigerator is used to cool the cooling liquid in the water tank to complete the heat dissipation of the treatment head. Only a single semiconductor refrigerator for heat dissipation of the treatment head is provided in the laser hair removal handpiece, which reduces the cost of the laser hair removal handpiece, makes the structure of the laser hair removal handpiece simple and compact, and reduces the weight of the laser hair removal handpiece; and, in order to ensure the heat dissipation effect when using a single semiconductor refrigerator, a plurality of microchannels capable of circulating cooling liquid are provided in the treatment head to increase the contact area between the cooling liquid and the treatment head, thereby increasing the heat dissipation effect of the treatment head.

[0023] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0024] Example

[0025] See also Figure 1 The figure shows a schematic diagram of the internal structure of a laser hair removal handpiece. This embodiment provides a laser hair removal handpiece, including: a handpiece housing 8, a treatment head 1, a water tank 3, a single semiconductor cooler 4, a water cooling plate 5 and a laser emitting device.

[0026] The treatment head 1 is fixed to one side of the handpiece housing 8, the water tank 3 and the water cooling plate 5 are fixed in the handpiece housing 8, the water tank 3 is connected to the treatment head 1, and there is cooling liquid in the water tank 3, and the cooling liquid can be circulated between the water tank 3 and the treatment head 1.

[0027] Wherein, the cooling liquid is a mixed liquid of water and ethylene glycol, which has an antifreeze function. The water tank 3 is made of a copper alloy with high thermal conductivity.

[0028] The single semiconductor refrigerator 4 is arranged between the water tank 3 and the water-cooled plate 5, wherein the cooling surface of the single semiconductor refrigerator 4 is in contact with the bottom of the water tank; and the other surface of the single semiconductor refrigerator away from the cooling surface is in contact with the top surface of the water-cooled plate.

[0029] The laser emitting device is disposed on the water-cooling plate 5 and is connected to the water-cooling plate 5 by bolts; the light-emitting side of the laser emitting device is spaced apart from the treatment head 1 .

[0030] A plurality of microchannels 12 are provided in the treatment head 1 . The cooling liquid in the water tank 3 first flows into the plurality of microchannels 12 in the treatment head 1 to dissipate heat for the treatment head 1 , and then returns to the water tank 3 from the microchannels 12 of the treatment head 1 .

[0031] Specifically, the laser emitting device includes: a light guide device 9 and a laser 6; the laser 6 is arranged on the water-cooling plate 5 and is threadedly connected to the water-cooling plate 5; the light guide device 9 is arranged between the treatment head 1 and the laser 6, wherein the surface of the light guide device 9 on the light incident side is in contact with the laser 6, and the surface of the light guide device 9 on the light output side is spaced apart from the treatment head, and the distance between the surface of the light guide device on the light output side and the treatment head is between 2 mm and 3 mm.

[0032] The water cooling plate 5 and the laser 6 are connected by bolt threads.

[0033] From the above description, it can be seen that in the laser hair removal handpiece proposed in this embodiment, the water cooling plate 5 is provided to cool the laser 6 on the one hand, and to cool the single semiconductor cooler 4 on the other hand. Therefore, even when only a single semiconductor cooler is provided in the laser hair removal handpiece, the heat dissipation and cooling effect of the treatment head and the laser in the laser hair removal handpiece can be ensured.

[0034] In one embodiment, the light guide device 9 is a wedge-shaped light guide cone or a wedge-shaped optical waveguide. Figure 2 The schematic diagram of the treatment head shown in FIG. Figure 3 As shown in the schematic diagram of the external structure of the water tank, the treatment head 1 also includes: a treatment head water inlet 13 and a treatment head water outlet 14; the water tank is provided with a water tank inlet 31 and a water tank outlet 32.

[0035] The treatment head water inlet 13 and the treatment head water outlet 14 are arranged side by side on a side of the treatment head 1 close to the light guide device 9 .

[0036] One end of the treatment head water inlet 13 is connected to one end of the multiple microchannels 12, and the other end is connected to the water tank outlet 32 ​​of the water tank 3; one end of the treatment head water outlet 14 is connected to the other end of the multiple microchannels, and the other end is connected to the water tank inlet 31 of the water tank 3.

[0037] In one embodiment, the extension direction of the plurality of microchannels 12 is perpendicular to the arrangement direction of the treatment head water inlet 13 and the treatment head water outlet 32 ​​.

[0038] In order to connect the treatment head and the water tank, the laser hair removal handpiece proposed in this embodiment further includes: a pipeline 2; the treatment head water inlet 13 and the treatment head water outlet 14 are respectively connected to the water tank 3 through the pipeline 2.

[0039] The water inlet 13 of the treatment head is connected to the water outlet 32 ​​of the water tank 3 through the pipe 2 ; the water outlet 14 of the treatment head is connected to the water inlet 31 of the water tank 3 through the pipe 2 .

[0040] See also Figure 4 Front view of the treatment head shown, see Figure 5 shown Figure 4 In the cross-sectional view along the AA direction, the laser hair removal handpiece proposed in this embodiment further includes: a sapphire glass 11; a fixing groove 15 is provided on the light-emitting side of the treatment head 1, and the sapphire glass 11 is arranged in the fixing groove 15.

[0041] The plurality of microchannels 12 allow circulating cooling liquid to cool the treatment head 1 and the sapphire glass 11 to dissipate heat and reduce temperature.

[0042] In one embodiment, the sapphire glass 11 is placed in the fixing groove 15 by gluing. Figure 6 shown Figure 3 Schematic diagram in the middle BB direction, in the laser hair removal handpiece proposed in this embodiment, a plurality of ribs 34 are provided inside the water tank 3; a water tank flow channel 33 is formed between two adjacent ribs 34 among the plurality of ribs 34, and the cooling liquid flows in the water tank flow channel 33 in the water tank 3.

[0043] By arranging the water tank flow channel 33 and the ribs 34 in the water tank 3, the heat exchange area can be increased and the refrigeration efficiency can be improved.

[0044] In order to increase the heat exchange efficiency of the water cooling plate, the laser hair removal handpiece proposed in this embodiment further includes: a cooling water outlet joint 10 and a cooling water inlet joint 7; the cooling water outlet joint 10 and the cooling water inlet joint 7 are arranged side by side at the bottom of the water cooling plate 5.

[0045] By arranging a cooling water outlet joint 10 and a cooling water inlet joint 7 at the bottom of the water-cooling plate 5, the coolant in the water-cooling plate 5 can be replaced by an external water tank when the laser hair removal handpiece is not working, thereby increasing the heat exchange efficiency of the water-cooling plate 5.

[0046] The laser hair removal handpiece proposed in this embodiment is a laser hair removal handpiece based on microchannel refrigeration technology. Its working principle is: multiple microchannels 12 arranged in parallel inside the treatment head 1, the cooling fluid circulating through the multiple microchannels 12 of the treatment head 1 directly cools the skin, can quickly take away the heat on the skin, and thus achieve good treatment effects.

[0047] Furthermore, the cooling fluid, chilled by the single semiconductor refrigerator 4, cools the treatment head 1, simplifying the structure of the laser hair removal handpiece and reducing its weight. The multiple parallel microchannels 12 increase the contact area between the cooling fluid and the treatment head 1, thereby improving the heat transfer coefficient of the treatment head 1. The cooling fluid flows through the multiple parallel microchannels 12, effectively exchanging heat and removing heat, thereby enhancing the cooling effect of the cooling fluid on the treatment head.

[0048] In summary, this embodiment proposes a laser hair removal handpiece, which dissipates heat to the treatment head by arranging a single semiconductor cooler in the laser hair removal handpiece, wherein the single semiconductor cooler is arranged between a water tank and a water-cooled plate, and the cooling surface of the single semiconductor cooler is in contact with the bottom of the water tank, and the other surface away from the cooling surface is in contact with the top surface of the water-cooled plate; the cold surface of the single semiconductor cooler is used to cool the cooling liquid in the water tank, and the heat dissipation of the treatment head is completed. Compared with the method in the related art in which the laser hair removal handpiece uses multiple semiconductor coolers, which leads to higher costs, only a single semiconductor cooler is provided in the laser hair removal handpiece to dissipate heat to the treatment head, thereby reducing the cost of the laser hair removal handpiece, making the laser hair removal handpiece simple and compact in structure, and reducing the weight of the laser hair removal handpiece; moreover, in order to ensure the heat dissipation effect when using a single semiconductor cooler, a plurality of microchannels capable of circulating cooling liquid are provided in the treatment head, thereby increasing the contact area between the cooling liquid and the treatment head, thereby increasing the heat dissipation effect of the cooling liquid on the treatment head.

[0049] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A laser hair removal handpiece, characterized in that: include: Handpiece housing, treatment head, water tank, single semiconductor cooler, water cooling plate and laser emitting device; The treatment head is fixed to one side of the handpiece housing, the water tank and the water cooling plate are fixed inside the handpiece housing, the water tank is in communication with the treatment head, and the water tank contains cooling liquid, which can be circulated between the water tank and the treatment head; The single semiconductor refrigerator is arranged between the water tank and the water-cooling plate, wherein the cooling surface of the single semiconductor refrigerator is in contact with the bottom of the water tank; Another surface of a single semiconductor refrigerator away from the cooling surface is in contact with the top surface of the water-cooling plate; The laser emitting device is arranged on the water-cooling plate and connected to the water-cooling plate by bolts; the light-emitting side of the laser emitting device is spaced apart from the treatment head; The treatment head is provided with a plurality of microchannels. The cooling liquid in the water tank first flows into the plurality of microchannels in the treatment head to dissipate heat for the treatment head, and then returns to the water tank from the microchannels in the treatment head.

2. The laser hair removal handpiece according to claim 1, characterized in that: The laser emitting device comprises: a light guide device and a laser; The laser is arranged on the water-cooling plate and is connected to the water-cooling plate by bolts; the light guide device is arranged between the treatment head and the laser, wherein the surface of the light guide device on the light incident side is in contact with the laser, and the surface of the light guide device on the light output side is spaced apart from the treatment head, and the distance between the surface of the light guide device on the light output side and the treatment head is between 2 mm and 3 mm.

3. The laser hair removal handpiece according to claim 2, characterized in that: The light guide device adopts a wedge-shaped light guide cone or a wedge-shaped optical waveguide.

4. The laser hair removal handpiece according to claim 1, characterized in that: The treatment head further comprises: a treatment head water inlet and a treatment head water outlet; the water tank is provided with a water tank water inlet and a water tank water outlet; One end of the water inlet of the treatment head is connected to one end of the plurality of micro-channels, and the other end is connected to the water outlet of the water tank; One end of the water outlet of the treatment head is connected to the other end of the plurality of micro-channels, and the other end is connected to the water inlet of the water tank; Wherein, the extension direction of the plurality of microchannels is perpendicular to the arrangement direction of the water inlet and the water outlet of the treatment head.

5. The laser hair removal handpiece according to claim 4, characterized in that: Also includes: pipelines; The water inlet and the water outlet of the treatment head are respectively connected to the water tank through the pipeline.

6. The laser hair removal handpiece according to claim 1, characterized in that: Also includes: Sapphire glass; A fixing groove is provided on the light-emitting side of the treatment head, and the sapphire glass is arranged in the fixing groove.

7. The laser hair removal handpiece according to claim 6, characterized in that: The sapphire glass is set in the fixing groove by gluing.

8. The laser hair removal handpiece according to claim 1, characterized in that: A plurality of ribs are provided inside the water tank; A water tank flow channel is formed between two adjacent ribs among the plurality of ribs, and the cooling liquid flows in the water tank flow channel in the water tank.

9. The laser hair removal handpiece according to claim 1, characterized in that: Also includes: Cooling water outlet joint and cooling water inlet joint; The cooling water outlet joint and the cooling water inlet joint are arranged side by side at the bottom of the water cooling plate.

10. The laser hair removal handpiece according to any one of claims 1 to 9, characterized in that: The cooling liquid is a mixed liquid of water and ethylene glycol.

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