Laser needle and hand tool

Abstract

The invention relates to the technical field of laser treatment, and particularly discloses a laser needle and a hand tool, the laser needle comprises a needle body and a light guide fiber, the needle body is provided with a hollow channel, the side wall of the far end of the needle body is provided with a light transmitting part, the light guide fiber is located in the hollow channel, and the far end of the light guide fiber extends to the light transmitting part. The far end of the light-guide fiber is provided with at least two light-emitting surfaces, the light-emitting surfaces are obliquely arranged relative to the axial direction of the light-guide fiber, and at least part of laser beams guided out through the light-emitting surfaces are emitted through the light-transmitting part; the end face of the light-guide fiber is made into at least two light-emitting surfaces which are inclined relative to the axial direction of the light-guide fiber, so that a laser beam in the light-guide fiber can be divided into two or more beams to be emitted from the side face of the needle body, and the wavelength of the divided laser beam is not changed while the energy density is reduced; therefore, the risk of skin burn caused by excessively concentrated energy of the laser beams can be avoided, meanwhile, the laser beams can irradiate a wider area, the efficiency and safety of laser treatment are remarkably improved, and the treatment time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of laser treatment, and in particular to a laser needle and a hand tool. Background Art

[0002] Cosmetic laser therapy is to use laser instruments to emit a beam of light of a specific wavelength to act on the skin, in order to achieve the cosmetic effect of improving skin problems and improving skin quality. However, cosmetic laser therapy usually acts on the surface of the skin, which is easily reflected and absorbed by the surface of the skin, causing the tissue under the skin to be unable to absorb the laser, thereby weakening the therapeutic effect of cosmetic laser therapy.

[0003] There are cosmetic laser needles in the related art, which can destroy pigments, stimulate collagen regeneration and dilate capillaries through the mechanical stimulation of microneedles and the effect of laser energy, thereby achieving cosmetic effects. However, the laser needles in the related art have problems such as uneven laser energy distribution, long treatment time and poor treatment effect. Summary of the invention

[0004] The present invention discloses a laser needle and a hand tool to solve the above technical problems existing in the cosmetic laser needle in the related art.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions: In a first aspect, the present application provides a laser needle, comprising a needle body and an optical fiber, wherein the needle body has a hollow channel, a light-transmitting portion is provided on a distal side wall of the needle body, the optical fiber is located in the hollow channel, and the distal end of the optical fiber extends to the light-transmitting portion; the distal end of the optical fiber has at least two light-emitting surfaces, the light-emitting surfaces are arranged to be inclined relative to the axial direction of the optical fiber, and at least part of the laser light beam guided through the light-emitting surfaces is emitted through the light-transmitting portion.

[0006] Furthermore, the light-transmitting portion includes a light-transmitting hole, and the light-transmitting hole passes through the needle body and is connected to the hollow channel.

[0007] Furthermore, the light-transmitting portion includes a light-transmitting sheet, and the light-transmitting sheet is embedded in the side wall of the needle body.

[0008] Further, along the axial direction of the needle body, the length of the light-transmitting portion is greater than the extended length of the light-emitting surface; and / or, along the circumferential direction of the needle body, the width of the light-transmitting portion is greater than the extended width of the light-emitting surface.

[0009] Furthermore, the light emitting surface is a plane, a concave arc surface or a convex arc surface.

[0010] Furthermore, when the light emitting surface is a plane, the axis of the light-transmitting portion is parallel to the normal line of the light emitting surface.

[0011] Furthermore, in the case where the light emitting surface is a concave arc surface, along the extension direction of the light transmitting portion from the inner end to the outer end thereof, the cross-sectional size of the light transmitting portion gradually increases.

[0012] Furthermore, in the case where the light emitting surface is a convex arc surface, along the extension direction of the light transmitting portion from the inner end to the outer end thereof, the cross-sectional size of the light transmitting portion gradually decreases.

[0013] Furthermore, the light-transmitting portions are evenly distributed along the circumference of the needle body.

[0014] Furthermore, the needle body is fixed to the optical fiber by adhesive bonding.

[0015] In a second aspect, the present application also provides a hand tool, comprising the aforementioned laser needle.

[0016] Furthermore, the hand tool includes a shell and a driving unit, the needle body is telescopically arranged at the distal end of the shell, the driving unit is arranged in the shell and connected to the needle body, and the driving unit is used to drive the needle body to telescopically move relative to the shell.

[0017] The technical solution adopted by the present invention can achieve the following beneficial effects: The laser needle and handpiece of the present application, by making the end face of the optical fiber into at least two light-emitting surfaces inclined relative to its axial direction, can make the laser light beam in the optical fiber be divided into two or more beams and emit from the side of the needle body. The wavelength of the separated laser light beams remains unchanged while the energy density is reduced, which can avoid the risk of skin burns caused by excessive concentration of laser beam energy, and at the same time enable the laser beam to irradiate a wider area, significantly improving the efficiency and safety of laser treatment and shortening the treatment time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic diagram of the structure of a laser needle in an embodiment of the present application; Figure 2 It is one of the cross-sectional schematic diagrams of the laser needle of the embodiment of the present application; Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle A; Figure 4 This is the second cross-sectional schematic diagram of the laser needle of the embodiment of the present application; Figure 5 yes Figure 4 A partial enlarged schematic diagram of point B in the middle; Figure 6 is a schematic diagram of light emission when the light emission surface of the embodiment of the present application is a concave arc surface; Figure 7 is a schematic diagram of light emission when the light emission surface of the embodiment of the present application is a convex arc surface; Figure 8 It is one of the structural schematic diagrams of the hand tool in the embodiment of the present application; Fig. 9 is a schematic diagram of the internal structure of the hand tool according to an embodiment of the present application; Fig.10 yes Fig. 9 A partial enlarged schematic diagram of point C in the middle; Fig.11 This is the second structural schematic diagram of the hand tool according to the embodiment of the present application.

[0020] In the figure: 100, needle body; 110, hollow channel; 120, light-transmitting portion; 200, optical fiber; 210, light-emitting surface; 300, shell; 310, negative pressure chamber; 400, negative pressure tube; 500, driving unit. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0022] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0023] In the related art, the laser needle used for cosmetic laser treatment usually includes a needle body and an optical fiber disposed in the needle body. After the needle body is inserted into the human skin, the laser beam transmitted by the optical fiber is collimated and emitted from the distal end surface of the optical fiber, and acts on the target to be treated in the skin (such as pigment particles) through the distal hole of the needle body. However, the inventor found in the research process that the energy density of the laser beam emitted only through the distal hole of the needle body is relatively large, which is prone to skin burns. In addition, this optical fiber emission method makes the irradiation area formed by the laser beam relatively limited, and it is difficult to irradiate a wider area. That is, there is an uneven distribution of laser energy during laser treatment, which leads to low efficiency, poor effect and long time consumption of the entire laser treatment process.

[0024] In view of this, the present application embodiment discloses a laser needle and hand tool. Figures 1 to 11 , the laser needle and hand tool provided in the embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0025] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the present application discloses a laser needle, which is used for cosmetic laser treatment. The laser needle can introduce laser light of a specific wavelength (e.g., 632.8um or 670um) into human subcutaneous tissue to irradiate the target to be treated in human skin (e.g., pigment particles, acne, etc.). Specifically, the disclosed laser needle includes a needle body 100 and an optical fiber 200, wherein the needle body 100 is a basic component of the laser needle and can provide an installation foundation for the optical fiber 200. Specifically, see Figure 2 and Figure 3 The needle body 100 has a hollow channel 110, which penetrates the needle body 100 along the axial direction of the needle body 100. The hollow channel 110 can accommodate the optical fiber 200, and the distal end of the optical fiber 200 is located in the hollow channel 110. For example, the distal end of the optical fiber 200 can be fixed in the hollow channel 110 by gluing. It can be understood that the distal end of the needle body 100 in the embodiment of the present application is a sharp tip. When laser treatment is performed on the skin, the sharp tip has a good puncture effect and can easily penetrate the surface layer of the skin and enter the skin.

[0026] In the embodiment of the present application, a light-transmitting portion 120 is provided on the distal side wall of the needle body 100 , and the distal end of the optical fiber 200 extends to the light-transmitting portion 120 . The distal end of the optical fiber 200 has at least two light-emitting surfaces 210 , and the multiple light-emitting surfaces 210 together constitute the distal end face of the optical fiber 200 .

[0027] In the embodiment of the present application, the light-emitting surface 210 is tilted relative to the axial direction of the optical fiber 200, so that the light-emitting area of ​​the light-emitting surface 210 corresponds to the light-transmitting portion 120 on the needle body 100. In this way, when a laser beam is transmitted in the optical fiber 200, the laser beam is emitted from the light-emitting surface 210, and at least part of the laser beam emitted through the light-emitting surface 210 is emitted outward through the light-transmitting portion 120. It can be understood that the laser beam emitted through the light-emitting surface 210 includes a laser beam whose incident area is located outside the light-transmitting portion 120, and a laser beam whose incident area is located inside the light-transmitting portion 120.

[0028] For example, see Figure 2 , Figure 3 and Figure 4 The distal end of the optical fiber 200 has two light-emitting surfaces 210, and the two light-emitting surfaces 210 can be symmetrically arranged relative to the central axis of the needle body 100. During specific processing, the two light-emitting surfaces 210 can be formed by polishing the distal end of the optical fiber 200. Of course, in other optional embodiments of the present application, the number of light-emitting surfaces 210 can also be adaptively designed according to the use requirements, for example, it can be three or four, and the present application does not make specific restrictions on this.

[0029] Based on the aforementioned technical solution, when the laser needle of the embodiment of the present application is used for skin beauty treatment, based on the two or more light-emitting surfaces 210 obliquely arranged at the distal end of the optical fiber 200, the laser beam is divided into two or more beams at the distal end of the optical fiber 200, and each of the divided laser beams can be emitted outward from the light-transmitting portion 120 on the side wall of the needle body 100 to illuminate the area to be treated. Compared with the traditional method of collimating the laser beam along the axial direction of the needle body, this method can make the laser beam irradiate a wider area, so that more pigment particles or hemoglobin waiting for treatment targets are irradiated, which can significantly improve the efficiency of laser treatment and shorten the treatment time.

[0030] At the same time, when the total amount of laser light beams transmitted in the optical fiber 200 remains unchanged, the energy of each laser beam separated by the light-emitting surface 210 will be reduced accordingly, while the wavelength of each separated laser beam will not change. In this way, while not affecting the treatment effect of the laser wavelength, it is possible to avoid excessive concentration of laser energy, that is, to avoid the risk of skin burns caused by excessive laser energy at a single point. It can be seen from this that the laser needle of the embodiment of the present application has the characteristics of high treatment efficiency and high treatment safety when performing laser treatment.

[0031] In some embodiments of this application, see Figure 2 and Figure 3The light-transmitting portion 120 may be a light-transmitting hole provided on the side wall of the needle body 100, the light-transmitting hole passes through the needle body 100 and is connected to the hollow channel 110, and at least part of the laser beam emitted through the light-emitting surface 210 is emitted through the light-transmitting hole. Exemplarily, the light-transmitting hole may be in various forms such as a circular hole, a square hole, an elliptical hole, etc., and the embodiments of the present application do not impose specific restrictions on this. In a preferred embodiment, the light-transmitting hole may be an oblong hole extending axially along the needle body 100, and the oblong hole extending axially can ensure that a large amount of laser beam can pass through, and can also ensure the structural strength of the needle body 100 at the opening, thereby preventing the needle body 100 from being easily bent and deformed at the opening.

[0032] During the research process, the inventor discovered that if a light-transmitting hole is opened on the distal side wall of the needle body 100, after the needle body 100 is inserted into the human skin layer, tissue fluid or other liquids in the human body can easily enter the light-transmitting hole, thereby forming an irregular lens structure in the hollow channel 110 or the light-transmitting hole of the needle body 100. The lens structure can produce reflection, refraction and other effects on the laser emitted through the light-emitting surface 210, so that the laser light beam emitted through the light-emitting surface 210 is directed toward the inner wall of the needle body 100, thereby resulting in a reduction in the total amount and density of laser light emitted outward by the entire laser needle, which in turn leads to poor treatment effect.

[0033] Based on this situation, in some embodiments of the present application, the light-transmitting portion 120 can also be made of a light-transmitting material. Specifically, the light-transmitting portion 120 can be a light-transmitting sheet (not shown) embedded in the needle body 100, and the laser beam emitted through the light-emitting surface 210 can be emitted through the light-transmitting sheet. Exemplarily, the light-transmitting sheet can be made of transparent fiberglass material, polycarbonate material, etc., as long as it can be stably arranged on the needle body 100 and has good light transmittance, and the embodiments of the present application do not impose specific restrictions on this.

[0034] Compared with the method of opening a light-transmitting hole on the needle body 100, the method of embedding a light-transmitting sheet can form a barrier between the needle body 100 and the deep skin, which can effectively prevent human tissue fluid or other liquids from entering the needle body 100, thereby avoiding the reflection or refraction of the laser beam by the human tissue fluid or other liquids entering the needle body 100, and ensuring the laser energy passing through the needle body 100. In other words, by embedding a light-transmitting sheet made of a light-transmitting material, the laser beam can be prevented from being conducted to the inner wall of the needle body 100, thereby ensuring the energy of the laser emission. It can be understood that, whether it is the form of opening a light-transmitting hole in the needle body 100 or the form of embedding a light-transmitting sheet on the needle body 100, the laser needle in the embodiment of the present application is a disposable laser needle.

[0035] In some embodiments of the present application, the diameter of the optical fiber 200 matches the inner diameter of the hollow channel 110. In this way, when the optical fiber 200 is placed in the hollow channel 110, the two have a good fit, which can prevent the optical fiber 200 from shaking in the hollow channel 110, thereby allowing the light emitting surface 210 to stably correspond to the light transmitting portion 120 to emit light.

[0036] In a further technical solution, along the axial direction of the needle body 100 , the length of the light-transmitting portion 120 is greater than the extension length of the light-emitting surface 210 , so that when the optical fiber 200 is embedded, the light-emitting surface 210 can fall within the inner area of ​​the light-transmitting portion 120 in the axial direction of the needle body 100 .

[0037] In a further technical solution, along the circumferential direction of the needle body 100 , the width of the light-transmitting portion 120 is greater than the extension width of the light-emitting surface 210 , so that when the optical fiber 200 is embedded, the light-emitting surface 210 can fall within the inner area of ​​the light-transmitting portion 120 in the circumferential direction of the needle body 100 .

[0038] Based on the above scheme, when the optical fiber 200 is installed in the needle body 100, the light-emitting surface 210 can be completely located within the inner area of ​​the light-transmitting portion 120. In this way, the laser light beam output through the light-emitting surface 210 is completely transmitted to the light-transmitting portion 120, which can minimize the energy loss of the laser light beam on the inner wall of the needle body 100 and improve the utilization rate of the laser energy.

[0039] In some embodiments of this application, see Figure 3 , Figure 4 and Figure 5 , the light emitting surface 210 may be a plane. In a further technical solution, when the light emitting surface 210 is a plane, the axis of the light-transmitting portion is parallel to the normal of the light-emitting plane. With such a setting, it is possible to reduce or even avoid the laser beam irradiating the side wall of the light-transmitting portion 120, so that as many laser beams as possible pass through the light-transmitting portion 120 to irradiate the target to be treated.

[0040] In some embodiments of this application, see Figure 3 and Figure 6 , the light-emitting surface 210 may be a concave arc surface. Under such a configuration, when the laser beam is guided out through the light-emitting surface 210, the light-emitting surface 210 can diverge the laser beam. Under the condition of ensuring the energy density of the laser beam, the concave surface design of the light-emitting surface 210 can further enable the laser to irradiate a wider area, thereby further improving the efficiency of laser treatment.

[0041] In a further technical solution, when the light emitting surface 210 is a concave arc surface, the cross-sectional size of the light transparent portion 120 gradually increases along the extension direction of the light transparent portion 120 from its inner end to its outer end. In other words, the size and shape of the light transparent portion 120 are adapted to the light emitting characteristics of the light emitting surface 210, thereby preventing the laser light diverged from the light emitting surface 210 from irradiating the edge of the light transparent portion 120 and failing to emit.

[0042] In some embodiments of this application, see Figure 3 and Figure 7 The light emitting surface 210 may be a convex arc surface. When the laser beam is guided out through the light emitting surface 210 , the light emitting surface 210 can converge the laser beam, thereby ensuring the energy density of the laser beam.

[0043] In a further technical solution, when the light-emitting surface 210 is a convex arc surface, the cross-sectional size of the light-transmitting portion 120 gradually decreases along the extension direction of the light-transmitting portion 120 from its inner end to its outer end. Similarly, this method adapts to the light-emitting characteristics of the light-emitting surface 210. At the same time, this method can reduce the opening size of the light-transmitting hole or the setting size of the light-transmitting sheet while ensuring the light output and density of the laser beam, which is beneficial to ensure the structural strength of the needle body 100 and prevent it from bending and deforming easily at the light-transmitting portion 120.

[0044] In the embodiment of the present application, two or more light-transmitting portions 120 are evenly distributed along the circumference of the needle body 100, and the light-emitting surface 210 of the distal end of the optical fiber 200 corresponds to the light-transmitting portion 120. With such a configuration, the laser transmitted through the optical fiber 200 is evenly split at the end, which can improve the uniformity of laser irradiation on the surrounding skin tissue.

[0045] In the embodiment of the present application, the needle body 100 and the optical fiber 200 are glued and fixed. The gluing and fixing of the two can prevent the optical fiber 200 from moving inside the needle body 100, that is, the installation stability of the optical fiber 200 inside the needle body 100 is improved, so that the light-emitting surface 210 always remains in a position corresponding to the light-transmitting portion 120.

[0046] The present application also discloses a handpiece for use in skin laser treatment, wherein the handpiece includes the aforementioned laser needle. Exemplarily, the handpiece includes a plurality of the aforementioned laser needles, and the plurality of laser needles can be arranged at the front end of the handpiece in an array.

[0047] In some embodiments of this application, see Figure 8~Figure 11The disclosed handpiece includes a housing 300 and a driving unit 500. The needle body 100 is telescopically arranged at the distal end of the housing 300. The driving unit 500 is arranged in the housing 300 and connected to the needle body 100. The driving unit 500 is used to drive the needle body 100 to move telescopically relative to the housing 300. By controlling the action of the driving unit 500, the length of the needle body 100 extending out of the distal end of the housing 300 can be controlled. Exemplarily, the driving unit 500 can be an electric push rod. After the driving unit 500 drives the needle body 100 to extend out of the housing 300, the needle body 100 can be inserted into the human skin tissue, and laser irradiation treatment is performed through the laser transmitted by the optical fiber 200.

[0048] In a further technical solution, a negative pressure chamber 310 is further formed at the distal end of the shell 300, and a negative pressure tube 400 connected to the negative pressure chamber 310 is further arranged in the shell 300. When the hand tool contacts the human skin, the negative pressure chamber 310 can be kept in a negative pressure state through suction of the negative pressure tube 400, so that the part of the human skin located in the negative pressure chamber 310 can adaptively approach the needle body 100 and the needle body 100 can be inserted into the human skin.

[0049] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0050] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A laser needle, characterized in that: It comprises a needle body (100) and an optical fiber (200); wherein: The needle body (100) has a hollow channel (110), a light-transmitting portion (120) is provided on a distal side wall of the needle body (100), the optical fiber (200) is located in the hollow channel (110), and the distal end of the optical fiber (200) extends to the light-transmitting portion (120); The distal end of the optical fiber (200) has at least two light emitting surfaces (210), the light emitting surfaces (210) being arranged obliquely relative to the axial direction of the optical fiber (200), and at least part of the laser light beams guided through the light emitting surfaces (210) are emitted through the light-transmitting portion (120).

2. The laser needle according to claim 1, characterized in that: The light-transmitting portion (120) comprises a light-transmitting hole, the light-transmitting hole penetrates the needle body (100) and is connected to the hollow channel (110); or the light-transmitting portion (120) comprises a light-transmitting sheet, the light-transmitting sheet is embedded in the side wall of the needle body (100).

3. The laser needle according to claim 1, characterized in that: Along the axial direction of the needle body (100), the length of the light-transmitting portion (120) is greater than the extended length of the light-emitting surface (210); and / or, along the circumferential direction of the needle body (100), the width of the light-transmitting portion (120) is greater than the extended width of the light-emitting surface (210).

4. The laser needle according to claim 1, characterized in that: The light emitting surface (210) is a plane, a concave arc surface or a convex arc surface.

5. The laser needle according to claim 4, characterized in that: When the light emitting surface (210) is a plane, the axis of the light-transmitting portion (120) is parallel to the normal line of the light emitting surface (210).

6. The laser needle according to claim 4, characterized in that: When the light emitting surface (210) is a concave arc surface, along the extension direction of the light-transmitting portion (120) from its inner end to its outer end, the cross-sectional size of the light-transmitting portion (120) gradually increases; Alternatively, when the light emitting surface (210) is a convex arc surface, along the extension direction of the light-transmitting portion (120) from its inner end to its outer end, the cross-sectional size of the light-transmitting portion (120) gradually decreases.

7. The laser needle according to claim 1, characterized in that: The light-transmitting portion (120) is evenly distributed along the circumference of the needle body (100).

8. The laser needle according to claim 1, characterized in that: The needle body (100) is glued and fixed to the optical fiber (200).

9. A hand tool, characterized in that: It comprises the laser needle described in any one of claims 1 to 8.

10. The hand tool according to claim 9, characterized in that The hand tool comprises a shell (300) and a driving unit (500); the needle body (100) is telescopically arranged at the distal end of the shell (300); the driving unit (500) is arranged in the shell (300) and connected to the needle body (100); the driving unit (500) is used to drive the needle body (100) to telescopically move relative to the shell (300).

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