Laser acne treatment hand tool
By incorporating a sealed vacuum chamber into the laser acne treatment handpiece, the problem of condensation on the optical lens was solved, thereby improving lens protection and the stability of treatment effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THE FIRST AFFILIATED HOSPITAL OF MEDICAL COLLEGE OF XIAN JIAOTONG UNIV
- Filing Date
- 2024-12-16
- Publication Date
- 2026-05-01
AI Technical Summary
Condensation often occurs on the surface of the optical lenses of existing laser acne treatment handpieces, leading to laser scattering and lens contamination, which affects treatment effectiveness and equipment lifespan.
A sealing cover is set between the handpiece housing and the cooling block to form a vacuum cavity, which isolates the air to prevent water vapor from contacting the optical lens and to prevent the formation of condensate.
It effectively avoids lens contamination, reduces laser scattering during treatment, extends lens lifespan, reduces patient pain, and improves treatment effectiveness.
Smart Images
Figure CN224180108U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of laser treatment technology, specifically a laser acne treatment handpiece. Background Technology
[0002] In recent years, laser therapy has gained increasing attention as an alternative to drug therapy for acne treatment. Existing laser acne treatment devices mostly use red and blue light, 532nm, 1064nm, 1450nm, and 1560nm lasers, which can inhibit excessive sebum secretion and thus reduce acne. However, these wavelengths are not the absorption peaks of sebum. During treatment, most of the light energy is absorbed by target chromophores such as water, hemoglobin, and melanin in the skin tissue, resulting in significant pain for patients. Some procedures require pre-treatment anesthetic, and post-treatment redness, swelling, crusting, and pigmentation are common. Current research indicates that sebum absorption at 1726nm laser is 1.8 times that of water, allowing it to selectively target sebaceous glands without damaging surrounding skin tissue, effectively inhibiting sebum secretion and reducing acne.
[0003] Laser acne treatment equipment typically consists of two parts: a main unit and a handpiece. The main unit contains a laser module, a control system, a water-cooled compressor, etc., which provides the handpiece with a light source, power supply, and cooling water. The handpiece, as the output component of the treatment device, often incorporates optical lenses, semiconductor cooling chips, and cooling blocks to ensure the appropriate laser output, minimize side effects, and provides necessary cooling to the skin through the cooling blocks, reducing patient discomfort.
[0004] However, existing treatment handpieces often exhibit condensation on the surface of the optical lens. This is because the semiconductor cooling chip reduces the temperature of the cooling block and optical lens through heat conduction. However, when the optical lens temperature is lower than room temperature, water vapor in the air condenses into small water droplets and adheres to the surface of the optical lens, forming condensation. This causes the treatment laser to scatter and the lens to become contaminated, resulting in inaccurate laser energy and even damage to the laser treatment handpiece. Utility Model Content
[0005] The purpose of this invention is to provide a laser acne treatment handpiece to solve the technical problems of laser scattering and lens contamination caused by condensation on the surface of the optical lens in current treatment handpieces.
[0006] The technical solution of this utility model is:
[0007] A laser acne treatment handpiece includes a handpiece housing, a cooling block, and an optical lens. The cooling block has a horizontal extension section and a vertical mounting section. One end of the horizontal extension section is fixed to the front end of the handpiece housing, and the vertical mounting section is fixed to the other end of the horizontal extension section. The vertical mounting section has a hollowed-out optical window, and the optical lens is connected to the optical window. A sealing cover is provided between the front end of the handpiece housing and the horizontal extension section and the vertical mounting section of the cooling block, and a cavity is formed between the sealing cover, the front end of the handpiece housing, the horizontal extension section, and the vertical mounting section. The cavity is a vacuum cavity.
[0008] Preferably, as a further improvement of this utility model, the sealing cover is arched, and both ends of the sealing cover are respectively sealed to the vertical mounting section of the cooling block and the front end face of the hand tool housing, and the bottom of the opening of the sealing cover is sealed to the horizontal extension section of the cooling block.
[0009] Preferably, as a further improvement of this utility model, a positioning groove for positioning the sealing cover is provided in the vacuum sealing cavity, and the bottom of the sealing cover is inserted into the positioning groove.
[0010] Preferably, as a further improvement of this utility model, the sealing cover is made of a transparent material.
[0011] Preferably, as a further improvement of this utility model, the sealing cover is made of transparent plexiglass or transparent polycarbonate.
[0012] Preferably, as a further improvement of this utility model, the height of the vacuum sealing cavity is in the range of 3cm-7cm.
[0013] Preferably, as a further improvement of this utility model, the handpiece housing is provided with a spot shaping system, which includes a homogenizing lens, an optical fiber connector, a mounting ring, and a dustproof sheet. The end of the homogenizing lens is provided with an optical fiber base, and is connected to the optical fiber connector through the optical fiber base to reduce, collimate, and homogenize the spot of light input through the optical fiber. A mounting ring is provided on the front side of the homogenizing lens, and the mounting ring is fixed to the front end of the handpiece housing. The dustproof sheet is fixed to the mounting ring by adhesive. The mounting ring is fixed to the front end of the handpiece housing.
[0014] Preferably, as a further improvement of this utility model, the homogenizing lens, the dustproof sheet, and the optical lens are arranged coaxially and collinearly.
[0015] Preferably, as a further improvement of this utility model, the optical lens is a sapphire lens.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] By providing a sealing cover between the handpiece housing and the horizontal extension section and the vertical mounting section of the cooling block, and by evacuating the cavity formed between the sealing cover and the front end of the handpiece housing, the horizontal extension section and the vertical mounting section, a vacuum cavity is formed. Under vacuum sealing, the water vapor in the air is isolated from the air to prevent condensation from coming into contact with the cooled optical lens, thereby effectively preventing lens contamination, reducing the scattering of the treatment laser, and extending the service life of the lens. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of a laser acne treatment handpiece according to an embodiment of the present invention;
[0019] Figure 2 This is a cross-sectional view of the internal structure of a laser acne treatment handpiece according to an embodiment of the present invention. Detailed Implementation
[0020] The following is in conjunction with the appendix Figure 1 To the attached Figure 2 The specific embodiments of this utility model will be described in detail below. In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0021] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of a utility model, unless otherwise stated, "a plurality of" means two or more.
[0022] Example
[0023] like Figure 1 and Figure 2As shown, this utility model embodiment provides a laser acne treatment handpiece, including a handpiece housing 1, a cooling block 2, and an optical lens 3. The cooling block 2 has a horizontal extension section and a vertical mounting section. One end of the horizontal extension section is fixed to the front end of the handpiece housing 1, and the vertical mounting section is fixed to the other end of the horizontal extension section. The vertical mounting section is provided with a hollow optical window, and the optical lens 3 is connected to the optical window. A sealing cover 4 is provided between the front end of the handpiece housing 1 and the horizontal extension section and the vertical mounting section of the cooling block 2, and a cavity is formed between the sealing cover 4 and the front end of the handpiece housing 1, the horizontal extension section, and the vertical mounting section. The cavity is a vacuum cavity.
[0024] In this embodiment, a sealing cover 4 is provided between the horizontal extension section and the vertical mounting section of the handpiece housing 1 and the cooling block 2. After the cavity formed between the sealing cover 4 and the front end of the handpiece housing 1, the horizontal extension section and the vertical mounting section is evacuated, a vacuum cavity is formed. Under the vacuum sealing state, the water vapor in the air is isolated from the air to prevent condensation of water vapor due to contact with the cooled optical lens 3, thereby effectively preventing lens contamination, reducing the scattering of the treatment laser and extending the service life of the lens.
[0025] Furthermore, the sealing cover 4 is arched to fit the shape of the hand tool housing 1. The two ends of the sealing cover 4 are respectively sealed to the vertical mounting section of the cooling block 2 and the front end face of the hand tool housing 1 with sealant. The bottom of the opening of the sealing cover 4 is sealed to the horizontal extension section of the cooling block 2 with sealant.
[0026] In order to facilitate the positioning of the sealing cover 4 during installation, a positioning groove is provided in the vacuum sealing cavity for positioning the sealing cover 4 during installation, and the bottom of the sealing cover 4 is inserted into the positioning groove.
[0027] Furthermore, to facilitate doctors' viewing of the affected area and the location of the treatment laser, the sealing cover 4 is made of transparent material.
[0028] Specifically, the sealing cover 4 is made of transparent plexiglass or transparent polycarbonate. The above materials have good local transparency, which makes it easy to observe. They have excellent optical performance, high light transmittance, and do not cause obvious light distortion or dispersion. The observation accuracy is not affected. At the same time, they also have excellent mechanical properties, high strength, good toughness, high chemical stability, corrosion resistance, and are not easy to age.
[0029] Furthermore, to facilitate doctors in locating and observing the affected area, the height range of the vacuum sealing cavity is set to 3cm-7cm. When the height of the vacuum sealing cavity is greater than 7cm, it will increase the size of the handpiece structure and make treatment operations inconvenient. When the height is less than 3cm, it will be inconvenient for doctors to locate and observe the affected area.
[0030] In another embodiment of this utility model, a spot shaping system is provided inside the handpiece housing 1. The spot shaping system is fixed to the front end of the handpiece housing 1 and includes a homogenizing lens 51, an optical fiber connector 52, a mounting ring 53, and a dustproof sheet 54. It is used to collimate and homogenize the treatment laser and the indicator light. The homogenizing lens 51 is fixed in a mounting groove opened in the handpiece housing 1. The tail end of the homogenizing lens 51 is provided with an optical fiber base and is connected to the optical fiber connector 52 through the optical fiber base. The optical fiber connector 52 is connected to an external optical fiber. The homogenizing lens 51 contains four spherical optical lenses, the first spherical optical lens... The second spherical optical lens focuses and collimates the light beam emitted from the optical fiber. The third and fourth spherical optical lenses are used to homogenize the collimated light. The final treatment spot and indicator spot diameter ranges from 2mm to 5mm, which is close to the size of acne, avoiding damage to the healthy skin tissue around the acne. A dustproof sheet 54 is provided at the front end of the homogenizing lens 51 to prevent dirt and scratches on the homogenizing lens 51. The dustproof sheet 54 is fixed to the mounting ring 53 by adhesive. The mounting ring 53 is fixed to the front end of the handpiece housing 1 by screws. The interface between the dustproof sheet and the mounting ring, and the interface between the mounting ring and the housing are sealed with sealant.
[0031] The lenses in the laser spot reshaping system are all double-sided coated to enhance the transmittance of the 1700nm-1750nm treatment laser and indicator light, reduce the reflectivity of various surfaces, and reduce light energy loss. The treatment laser with an output wavelength of 1700nm-1750nm can target and destroy sebaceous glands through photothermal action without damaging surrounding skin tissue, effectively inhibiting sebum secretion and thus reducing acne. At the same time, it can significantly reduce common side effects of laser treatment such as redness, blisters, and pigmentation.
[0032] The homogenizing lens 51, the dustproof sheet 54, and the optical lens 3 are arranged coaxially and collinearly to ensure that the position of the beam is not affected.
[0033] In another embodiment of this utility model, such as Figure 1 As shown, the handpiece housing 1 is divided into a left handpiece housing 11, a right handpiece housing 12, a handpiece locking ring 13, and a fixing protective tube 14. The diameter and curved contour of the hand-held parts of the left handpiece housing 11 and the right handpiece housing 12 conform to hand gripping habits, and the tail end is designed with external threads. The left handpiece housing 11 and the right handpiece housing 12 are provided with mounting holes, and are fixed by screws after being snapped together. The fixing protective tube 14 is used to fix and support the external pipe 6 connected to the handpiece housing 1 to prevent it from falling off, loosening, and bending of the internal optical fiber. The external pipe 6 is connected to the rear end of the handpiece housing 1 through the fixing protective tube 14. The top of the fixing protective tube 14 is threaded to the left handpiece housing 11 and the right handpiece housing 12 through the handpiece locking ring 13. The external pipe 6 contains electrical connection wires, optical fibers, water pipes 23, and other structures.
[0034] In another embodiment of this utility model, such as Figure 2 As shown, the cooling block 2 is also equipped with a thermoelectric cooler 21 and a temperature sensing element 22. A cooling surface 202 is connected to the horizontal extension of the cooling block 2, and a heat-conducting surface 201 is fixed above the cooling surface 202 by screws. The thermoelectric cooler 21 is bonded between the heat-conducting surface 201 and the cooling surface 202 by thermal grease. The cold end of the thermoelectric cooler 21 is connected to the cooling surface 202, and the hot end of the thermoelectric cooler 21 is connected to the heat-conducting surface 201. The thermoelectric cooler 21 is electrically connected to the control system in the external host. A water channel is provided inside the heat-conducting surface 201. One end of the heat-conducting surface 201 is provided with an inlet / outlet 24, which is connected to a water pipe 23. The temperature sensing element 22 is electrically connected to the external host and is used to monitor the cooling temperature in real time and feed the temperature signal back to the host control system. The control system adjusts the cooling level of the thermoelectric cooler 21 according to the measured temperature signal to maintain the cooling temperature.
[0035] In this embodiment, a semiconductor cooling chip 21 is used as a temperature control device. Combined with a cooling and water cooling structure, heat is carried away in time through heat conduction and water channels. With the cooperation of temperature measuring element 22 and control system, the cooling level can be adjusted in multiple levels. The cooling temperature range is -5℃ to 10℃, and the cooling temperature of the front end of the cooling block 2 is maintained. The cooling block 2 serves as a heat conduction device and the output window for the treatment laser and indicator light. The side of the cooling block 2 located on the outside can directly contact the skin.
[0036] Furthermore, at least three pressure sensing elements and their indicator light structures 25 are provided on the outer wall of the vertical mounting section of the cooling block 2. The pressure sensing elements and their indicator light structures 25 are electrically connected to the external host and are used to detect whether the front end of the cooling block 2 is in complete contact with the skin. The indicator light provides visual feedback. During treatment, the pressure sensing element is in contact with the skin, and its indicator light faces the inside of the cooling block 2. During treatment, when the pressure sensing element does not detect pressure, the indicator light does not emit light. After the host control system receives the pressure signal, it can stop emitting the treatment laser, thereby effectively avoiding damage to the human skin and eyes caused by accidental laser emission.
[0037] In another embodiment of this utility model, an operation button 7 is provided on the side of the handpiece housing 1. The operation button 7 is used to directly control the output and pause of the treatment laser. This button is a single-push switch; when the operator presses it during treatment, the circuit is connected, thereby outputting the treatment laser and indicator light. The operation button 7 is located where the index finger touches when holding the laser acne treatment handpiece, and its position conforms to ergonomic design, providing comfort, effortless operation, and protection.
[0038] In another embodiment of this utility model, a buzzer 8 is fixed to the side of the handpiece housing 1 to provide an audible prompt when the treatment laser pulse is output. The single-pulse buzzer duration is 60ms, and the buzzer frequency is consistent with the repetition frequency of the treatment laser. Simultaneously, the indicator light output by this laser acne treatment handpiece can also be used to aim at the treatment area and provide visual feedback. By outputting synchronously with the treatment laser pulse signal during treatment, it effectively responds to the temporal changes of the treatment laser. Specifically, the indicator light is adjusted and controlled by the control system in the main unit. Before treatment, the indicator light is turned on, and its working mode is continuous light output mode, used for aiming at the treatment area. When the operator presses the operation button 7, the indicator light's working mode switches to pulse mode. At this time, the control system sends a pulse signal command to the laser and also sends a corresponding pulse signal command to the indicator light source to output a pulsed indicator light synchronized with the treatment laser. Preferably, the treatment laser pulse width is 0-60ms, and the frequency is 1-10Hz. To ensure that the human eye can capture and recognize the pulsed indicator light, the indicator light pulse width is set to 60ms, and the pulse frequency is consistent with the treatment laser pulse frequency.
[0039] Finally, it should be noted that this utility model needs to be used in conjunction with a laser acne treatment host. The host is equipped with a laser module, a control system, a water-cooled compressor, and a human-machine interface module. There are optical, electrical, and water path connections between the host and the handpiece. In the handpiece, the spot shaping system is connected to the laser module; the semiconductor cooling chip 21, temperature sensing element 22, pressure sensor and its indicator light 25, operation button 7, and buzzer 8 are all electrically connected to the control system; the inlet / outlet 24 in the cooling block 2 is connected to the outlet and inlet of the water-cooled compressor in the host through a water pipe 23 to achieve circulating water cooling.
[0040] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.
Claims
1. A laser acne treatment handpiece, comprising a handpiece housing (1), a cooling block (2), and an optical lens (3), characterized in that, The cooling block (2) has a horizontal extension section and a vertical mounting section. One end of the horizontal extension section is fixed to the front end of the handpiece housing (1), and the vertical mounting section is fixed to the other end of the horizontal extension section. The vertical mounting section is provided with a hollow optical window, and the optical lens (3) is connected to the optical window. A sealing cover (4) is provided between the front end of the handpiece housing (1), the horizontal extension section, and the vertical mounting section. A cavity is formed between the sealing cover (4), the front end of the handpiece housing (1), the horizontal extension section, and the vertical mounting section. The cavity is a vacuum-sealed cavity.
2. The laser acne treatment handpiece according to claim 1, characterized in that, The sealing cover (4) is arched, and the two ends of the sealing cover (4) are respectively sealed to the vertical installation section of the cooling block (2) and the front end face of the hand tool housing (1). The bottom of the opening of the sealing cover (4) is sealed to the horizontal extension section of the cooling block (2).
3. The laser acne treatment handpiece according to claim 1, characterized in that, The vacuum sealing cavity is provided with a positioning groove for positioning the sealing cover (4) during installation, and the bottom of the sealing cover (4) is inserted into the positioning groove.
4. The laser acne treatment handpiece according to claim 1, characterized in that, The sealing cover (4) is made of transparent material.
5. The laser acne treatment handpiece according to claim 4, characterized in that, The sealing cover (4) is made of transparent organic glass or transparent polycarbonate.
6. The laser acne treatment handpiece according to claim 1, characterized in that, The height of the vacuum-sealed cavity ranges from 3cm to 7cm.
7. The laser acne treatment handpiece according to claim 1, characterized in that, The handpiece housing (1) is equipped with a spot shaping system, which includes a homogenizing lens (51), an optical fiber connector (52), a mounting ring (53), and a dustproof sheet (54). The end of the homogenizing lens (51) is provided with an optical fiber base, and is connected to the optical fiber connector (52) through the optical fiber base to collimate and homogenize the spot input through the optical fiber. The homogenizing lens (51) is provided with a mounting ring (53) on the front side, and the mounting ring (53) is fixed to the front end of the handpiece housing (1). The dustproof sheet (54) is fixed to the mounting ring (53) by adhesive.
8. The laser acne treatment handpiece according to claim 7, characterized in that, The homogenizing lens (51), dustproof sheet (54) and optical lens (3) are arranged coaxially and collinearly.
9. The laser acne treatment handpiece according to claim 1, characterized in that, The optical lens (3) is a sapphire lens.