Lens of hair growth instrument

Abstract

The invention provides a hair growth instrument lens which is characterized in that the hair growth instrument lens comprises a lens body, the lens body is provided with a head cavity type structure used for containing the head of a user, and the head cavity type structure is provided with an outer surface and an inner surface; the outer surface is provided with uniformly distributed corrugated structures and is used for receiving incident light of a light source, refracting the incident light and irradiating the incident light to the head of a user through the inner surface. The corrugated lens is made of transparent plastic high in visible light transmittance, the outer surface of the corrugated lens is of a continuous corrugated structure, incident light of a light source can be refracted and then distributed, light spots in the center area of the light source can extend to the periphery, the light irradiance distribution is more uniform, meanwhile, the light spot area is increased, and the luminous efficiency is improved. The effective treatment area of the scalp is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a hair growth instrument lens. Background Art

[0002] Hair growth is a normal physiological process of the human body, but due to genetics, age, stress, disease and other reasons, some people will experience different degrees of hair loss problems. Among them, androgenetic alopecia (AGA) is the most common type of hair loss. AGA can affect both men and women, but with different hair loss patterns and prevalence rates. Although AGA does not affect physical health, it seriously affects the patient's mental health and quality of life. If it can be diagnosed and treated early, it can significantly delay the progression of hair loss and improve the patient's quality of life.

[0003] As early as 2007, the FDA approved the first low-level laser therapy (LLLT) device for the treatment of androgenic alopecia. It uses red light bands near 655nm to penetrate the surface skin and irradiate deep cells under the scalp. The red light near this band meets the needs of stimulating cell division and transmitting nutrients to synthesize ATP, thereby activating hair follicles on the head, accelerating hair follicle cell division, increasing hair follicle vitality, improving blood and lymphatic microcirculation in the scalp area, promoting local metabolism, dilating blood vessels, and regulating endocrine, thereby effectively promoting hair growth.

[0004] Low-energy lasers are widely used in photoelectric hair growth devices due to their superior penetration and relatively narrow spectral range, but the spot diameter of the laser is very small. The spot diameter of most semiconductor laser diodes used in hair growth devices is between 1cm and 3cm. The scalp area of ​​an adult is about 450~600 square centimeters. In order to allow the laser spot to irradiate a sufficiently large scalp area, manufacturers usually increase the number and distribution density of semiconductor laser diodes. For example, patent US20220117346A1 describes the use of 114 650nm wavelength semiconductor laser diodes for the treatment of hair loss. There are also hair growth caps integrated with 256 or more semiconductor laser diodes on the market. As the number of semiconductor laser diodes increases, the power consumption of the device will increase, and the use time of the internal battery will be greatly shortened, affecting the service life of the device. At the same time, for lasers with an output power of 5mW, if the number is too large and too concentrated, it is not suitable for heat dissipation, which may cause the device to heat up sharply and increase the risk of burns to patients.

[0005] In order to solve the problem of insufficient laser irradiation spot area, in recent years many manufacturers have adopted light-emitting diodes with larger divergence angles instead of semiconductor laser diodes. However, the irradiance distribution of light-emitting diodes is extremely uneven. The irradiance is highest directly below the light-emitting diode and becomes smaller and smaller at the edge of the spot, resulting in its effective irradiation area being only a part of the area directly below the light-emitting diode, and it is impossible to achieve effective treatment covering most of the scalp area. Summary of the invention

[0006] The existing hair growth treatment device has the problem of insufficient irradiation area of ​​the semiconductor laser diode and uneven irradiance distribution of the light emitting diode. The purpose of the present invention is to provide a hair growth device lens to improve the treatment efficiency of the device, optimize the scalp irradiation parameters, reduce the power consumption of the device, increase the life of the device and improve the treatment effect of hair loss.

[0007] To achieve the above-mentioned purpose, in the first aspect, the present invention provides a hair growth instrument lens, including a lens body, the lens body having a head cavity structure for accommodating the user's head, the head cavity structure having an outer surface and an inner surface; the outer surface having a uniformly distributed corrugated structure for receiving incident light from a light source, and refracting the incident light and emitting it through the inner surface to irradiate the user's head. Its beneficial effect is that the outer surface having a uniformly distributed corrugated structure can be used to refract and redistribute the incident light from any light source, so that the light spot in the central area can extend to the periphery, increase the light spot area, and at the same time make the light irradiance distribution more uniform, thereby increasing the effective treatment area of ​​the scalp.

[0008] In some embodiments, the effective visible light transmittance of the hair growth device lens is above 95%. Its beneficial effect is: ensuring the transmittance of visible light to ensure the treatment effect.

[0009] In some embodiments, the corrugated structure is in the shape of an arc, and in the longitudinal section thereof is in the shape of a sector, the radius of the sector is 0.15 mm to 2 mm, and the arc of the central angle of the sector is 60° to 135°. The beneficial effect is that the arc of the central angle of the sector is between 60° and 135°, which can make the law of refraction and scattering of red light by the hair growth instrument lens conform to Snell's law: .

[0010] In some embodiments, a plurality of the corrugated structures are sequentially distributed along the axis of the head cavity structure, and there are 1 to 20 corrugated structures distributed per millimeter along the axis.

[0011] In some embodiments, the thickness of the hair growth instrument lens is 0.15 mm to 2 mm. The beneficial effect is that the thickness of the hair growth instrument lens is within the range of 0.15 mm to 2 mm, which can ensure the mechanical properties of the hair growth instrument lens.

[0012] In some embodiments, the material of the hair growth instrument lens includes polypropylene (PP), polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), and polyethylene terephthalate-1,4-cyclohexane dimethanol (PETG). The beneficial effect is that transparent plastic with high visible light transmittance is selected as the raw material, and the thickness of the hair growth instrument lens is within the range of 0.15mm~2mm, which can ensure sufficient mechanical properties while ensuring sufficient visible light transmittance.

[0013] In some embodiments, the outer surface of the hair growth instrument lens has a slot for connecting to the hair growth cap. The beneficial effect is that the hair growth instrument lens needs to be used in conjunction with the hair growth cap, and the slot can fix the hair growth lens instrument.

[0014] In some embodiments, the head cavity structure has a bottom opening and a main body structure, the diameter of the bottom opening is larger than the diameter of the main body structure, and the top of the outer surface is a plane. The beneficial effect is that when the hair growth instrument lens is connected to the hair growth cap through the card slot, the diameter of the bottom opening is larger than the diameter of the main body structure, which can increase the aesthetics.

[0015] In some embodiments, the corrugated structure extends in a straight direction at the top of the outer surface, the corrugated structure forms a ring around the axis of the head cavity structure, and a plurality of the corrugated structures are connected in sequence.

[0016] In the second aspect, an embodiment of the present invention provides a hair growth cap, comprising a helmet body and a hair growth instrument lens as described in any one of claims 1 to 7; the helmet body has a accommodating cavity for accommodating the hair growth instrument lens, the helmet body comprises a helmet inner shell, the helmet inner shell comprises an LED lamp and a limit piece, the LED lamp can emit light of a specific frequency and irradiate the user's head through the hair growth instrument lens, and the limit piece is used to cooperate with the card slot to fix the hair growth instrument lens. The beneficial effects of the present invention are as follows: the hair growth instrument lens is made of transparent plastic with high visible light transmittance, and the outer surface has a continuous corrugated structure, which can refract the incident light of the light source and then redistribute it, so that the light spot in the central area of ​​the light source can be extended to the periphery, and the light irradiance distribution is made more uniform while increasing the light spot area, thereby improving the effective treatment area of ​​the scalp. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a lens diagram of the hair growth instrument of this embodiment; Figure 2 This is a diagram of the corrugated structure of the hair growth device lens of this embodiment; Figure 3 This is a cross-sectional view of the corrugated structure of the hair growth device lens of this embodiment; Figure 4 This is a diagram showing that the corrugated structure of the hair growth instrument lens in this embodiment satisfies Snell's law when refracting a light source; Figure 5 This is a diagram showing the effect of enlarging the light spot of the corrugated structure of the hair growth device lens in this embodiment.

[0018] Figure Number: 1. Main structure; 2. Bottom opening; 3. Card slot; 4. Corrugated structure; 41. Fan shape. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Unless otherwise specified, the "connection" described in this article can be a direct connection or an indirect connection, that is, connected through an intermediate.

[0020] In view of the problems existing in the prior art, the embodiments of the present invention provide a method for achieving the above-mentioned purpose. In the first aspect, the present invention provides a hair growth instrument lens, including a lens body, wherein the lens body has a head cavity structure for accommodating the user's head, and the head cavity structure has an outer surface and an inner surface; the outer surface has a uniformly distributed corrugated structure 4 for receiving incident light from a light source, and refracting the incident light and emitting it through the inner surface to irradiate the user's head.

[0021] In this embodiment, reference Figure 1 , Figure 2 and Figure 5 The lens body has a head cavity shape for accommodating the user's head, and the outer surface has a uniformly distributed corrugated structure 4, which can be used to refract and redistribute the incident light from any light source, so that the light spot in the central area can extend to the periphery, increase the light spot area, and make the light irradiance distribution more uniform. The appropriate head cavity structure can also further increase the effective treatment area of ​​the scalp.

[0022] In some embodiments, the effective visible light transmittance of the hair growth device lens is greater than 95%.

[0023] In this embodiment, when any light source emits visible light to the outer surface and then refracts and then passes through the inner surface, after detection, the intensity of the visible light passing through the inner surface is more than 95% of the intensity of the visible light emitted by the light source, thereby ensuring the transmittance of the visible light to further ensure the therapeutic effect.

[0024] In some embodiments, the corrugated structure 4 is in an arc shape, and is a sector 41 in its longitudinal section. The radius R of the sector 41 is 0.15 mm to 2 mm, and the arc angle θ of the central angle of the sector is 60° to 135°.

[0025] In this embodiment, reference Figure 2 , a plurality of the corrugated structures 4 are distributed in sequence and have the same structure. Figure 3 , cut along a direction perpendicular to the corrugation, the corrugated structure 4 is a fan-shaped 41 in cross section, the radius R of the fan-shaped 41 is 0.15 mm to 2 mm, and the arc angle θ of the central angle of the fan-shaped 41 is 60° to 135°, so that the refraction and scattering of the red light by the hair growth instrument lens conforms to Snell's law: ; At the same time, assuming that the laser is introduced as coherent light, the phase information is introduced, and the propagation of the light beam at the interface between the two media can be referred to Figure 4 , whose propagation conforms to the generalized Snell's law: ; in, is the refraction angle, is the incident angle, is the refractive index of the refracting medium, is the spatial refractive index of the incident side, and are the distance and phase difference between the two optical paths at the interface, is the gradient of the phase jump.

[0026] In some embodiments, a plurality of the corrugated structures 4 are sequentially distributed along the axis of the head cavity structure, and there are 1 to 20 corrugated structures 4 per millimeter along the axis.

[0027] In this embodiment, reference Figure 1 and Figure 2 In the present invention, a continuous arc-shaped protrusion is called a corrugated structure 4, and there are 1 to 20 corrugated structures 4 distributed per millimeter.

[0028] In some embodiments, the thickness of the hair growth device lens is 0.15 mm to 2 mm.

[0029] In this embodiment, the thickness of the hair growth device is equal to the radius R of the sector 41 .

[0030] In some embodiments, the material of the hair growth device lens includes polypropylene (PP), polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), and polyethylene terephthalate-1,4-cyclohexanedimethanol (PETG).

[0031] In this embodiment, other transparent plastics with high visible light transmittance can also be used as the raw materials of the hair growth device lens.

[0032] In some embodiments, the outer surface of the hair growth instrument lens has a slot 3 for connecting a hair growth cap.

[0033] In some embodiments, the head cavity structure has a bottom opening 2 and a main body structure 1, the diameter of the bottom opening 2 is larger than the diameter of the main body structure 1, and the top of the outer surface is a plane.

[0034] In some embodiments, the corrugated structure 4 extends in a straight line direction at the top of the outer surface, the corrugated structure 4 forms a ring around the axis of the head cavity structure, and several corrugated structures 4 are connected in sequence.

[0035] In this embodiment, reference Figure 4 and Figure 5 When light is irradiated vertically onto the surface of the optical lens, it does not directly transmit downward along the direction of the zero-degree angle, but is refracted and scattered on the sloped steps on the surface. The emission spot of the light source is expanded from the original D1 to D2. The specific expansion ratio D2 / D1 is related to the R value and θ value of the corrugated lens design.

[0036] In the second aspect, an embodiment of the present invention provides a hair growth cap, comprising a helmet body and a hair growth instrument lens as described in any one of claims 1 to 7; the helmet body has a receiving cavity for accommodating the hair growth instrument lens, the helmet body comprises a helmet inner shell, the helmet inner shell comprises an LED lamp and a limit piece, the LED lamp can emit light of a specific frequency and irradiate the user's head through the hair growth instrument lens, and the limit piece is used to cooperate with the card slot 3 to fix the hair growth instrument lens.

[0037] Example 1 This embodiment designs a hair growth cap based on low-energy laser, which contains 98 semiconductor laser diodes evenly distributed inside the hair growth cap, each semiconductor laser diode has an output power of 5mW and a spot diameter of 1cm; the hair growth instrument lens is made of polypropylene (PP) material, the thickness of the hair growth instrument lens is 0.15mm, the radius of the fan is 0.15mm, the arc of the central angle of the fan is 60°, and there is one corrugated structure distributed per millimeter along the axis. The distribution of the irradiance irradiated on the scalp surface is tested using a spectrometer, and the irradiance exceeds 2mW / cm 2The effective irradiation area is taken as the effective irradiation area, and the effective irradiation area below it is shown in the following table. The effective irradiation area is increased by 224%, which can achieve the treatment effect of more than 200 semiconductor laser diodes, while reducing power consumption and the risk caused by temperature rise. Taking a standard human scalp model as a reference, the scalp area is 468cm 2 After adding the hair growth device lens, the proportion of the treatment area can be increased from 17.7% to 39.7%, and the effect is significantly improved.

[0038]

[0039] Embodiment 2; This embodiment designs a hair growth cap based on light emitting diodes, which contains 102 light emitting diodes, evenly distributed inside the hair growth cap. The luminous flux left by each light emitting diode at the passing point of 60mA is 4lm, and the divergence angle of the light emitting diode is 120°; the hair growth instrument lens is made of polymethyl methacrylate (PMMA) material, the thickness of the hair growth instrument lens is 2mm, the radius of the fan is 2mm, the arc of the central angle of the fan is 135°, and there are 20 corrugated structures distributed per millimeter along the axis. The distribution of the irradiance irradiated on the scalp surface is tested using a spectrometer, and the irradiance exceeds 2mW / cm 2 The area below is taken as the effective irradiation area, and the effective irradiation area below it is shown in the following table. After adding the corrugated lens, the proportion of the treatment area can be increased from 35.9% to 91.2%, which can basically cover the entire treatment area of ​​the scalp and achieve good treatment effects.

[0040]

[0041] The above is only a specific implementation of the embodiment of the present application, but the protection scope of the embodiment of the present application is not limited thereto, and any changes or replacements within the technical scope disclosed in the embodiment of the present application should be included in the protection scope of the embodiment of the present application. Therefore, the protection scope of the embodiment of the present application should be based on the protection scope of the claims.

Claims

1. A hair growth instrument lens, characterized in that: The lens body comprises a head cavity structure for accommodating the head of a user, wherein the head cavity structure comprises an outer surface and an inner surface; The outer surface has a uniformly distributed corrugated structure for receiving incident light from a light source, and refracting the incident light to emit it through the inner surface to irradiate the user's head.

2. The hair growth device lens according to claim 1, characterized in that: The effective visible light transmittance of the hair growth instrument lens is above 95%.

3. The hair growth device lens according to claim 1, characterized in that: The corrugated structure is in an arc shape and is fan-shaped in its longitudinal section. The radius of the fan-shaped structure is 0.15 mm to 2 mm, and the arc of the central angle of the fan-shaped structure is 60° to 135°.

4. The hair growth device lens according to claim 3, characterized in that: A plurality of the corrugated structures are sequentially distributed along the axis of the head cavity structure, and 1 to 20 corrugated structures are distributed per millimeter along the axis.

5. The hair growth device lens according to claim 1, characterized in that: The thickness of the hair growth instrument lens is 0.15 mm to 2 mm.

6. The hair growth device lens according to claim 1, characterized in that: The materials of the hair growth instrument lens include polypropylene (PP), polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), and polyethylene terephthalate-1,4-cyclohexane dimethanol (PETG).

7. The hair growth device lens according to claim 1, characterized in that: The outer surface of the hair growth instrument lens is provided with a slot for connecting the hair growth cap.

8. The hair growth device lens according to claim 1, characterized in that: The head cavity structure has a bottom opening and a main body structure, the diameter of the bottom opening is larger than the diameter of the main body structure, and the top of the outer surface is a plane.

9. The hair growth device lens according to claim 8, characterized in that: The corrugated structure extends in a straight line direction at the top of the outer surface, the corrugated structure forms a ring around the axis of the head cavity structure, and a plurality of the corrugated structures are connected in sequence.

10. A hair growth cap, characterized in that: It comprises a helmet body and a hair growth instrument lens as claimed in any one of claims 1 to 9; The helmet body has a receiving cavity for receiving a hair growth device lens. The helmet body includes a helmet inner shell. The helmet inner shell includes an LED lamp and a limiting member. The LED lamp can emit light and irradiate the user's head through the hair growth device lens. The limiting member is used to cooperate with the card slot to fix the hair growth device lens.

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