CN116492604B - Laser treatment handle and laser treatment instrument - Google Patents

Abstract

The application relates to the technical field of electrotherapy, and discloses a laser treatment handle and a laser treatment instrument, wherein the laser treatment handle comprises a shell and an optical component; the shell is provided with a cavity which extends along the axial direction and is used for laser propagation, and an incident end and an emergent end which are positioned at two ends of the cavity; the optical component comprises a collimator, a beam splitter, a multi-focus diffraction element and a focusing lens which are arranged in the cavity and are sequentially arranged along the axial direction of the shell, laser enters from the incident end, is converted into a collimated beam through the collimator, is dispersed into a plurality of micro beams through the beam splitter, is emitted from the emergent end after passing through the multi-focus diffraction element and the focusing lens, and is focused in a three-dimensional space at a specific position away from the emergent end. The laser treatment handle solves the problem that the existing laser handle can not treat tissues with different depths, and improves the treatment effect of laser treatment.

Description

Laser therapy handles and laser therapy devices

Technical field

The invention relates to the technical field of electrotherapy, and in particular to a laser treatment handle and a laser treatment instrument.

Background technique

With the rapid development of laser technology, more and more laser technologies are being used in the field of medical beauty, and the therapeutic effect of laser on skin has also become the focus of many medical beauty circles. Fractional laser therapy mainly disperses a beam of light into multiple beams of light through a beam splitter. After the multiple beams of light are focused on the treatment area, the higher energy ablates melanin and bubbles in the skin and stimulates the production of collagen, thereby achieving Whitening, freckle removal and other treatment purposes.

However, the focus points of the multiple beams of light dispersed by the current laser treatment handle after passing through the beam splitter are on the same two-dimensional plane. It can only treat tissues in a two-dimensional plane area on the skin, but cannot target tissues at different depths in the skin. treatment, limiting the application of laser therapy.

Contents of the invention

The main purpose of the present invention is to provide a laser treatment handle, aiming to solve the problem that the existing laser treatment handle cannot treat skin tissues of different depths.

In order to achieve the above object, the laser treatment handle proposed by the present invention includes a housing and an optical component; the housing is formed with a cavity extending along its axial direction for laser propagation, and incident ends located at both ends of the cavity and the exit end; the optical component is located in the cavity, and the optical component includes a collimator, a beam splitter, a multi-focus diffractive element, a focusing lens, and a laser that are arranged sequentially along the axial direction of the housing. It enters from the incident end, is converted into a collimated beam by the collimator, is dispersed into a plurality of micro-beams by the beam splitter, and then exits from the exit through the multi-focus diffraction element and the focusing lens. It exits from the end, and finally focuses at a multi-focus point in a three-dimensional space at a specific position from the exit end.

In an embodiment of the present invention, the beam splitter, the multi-focus diffractive element, and the focusing lens are arranged at intervals along the axial direction of the cavity.

In an embodiment of the present invention, the multi-focus diffractive element and the beam splitter are integrally formed structures;

Or, the multi-focus diffractive element and the focusing lens are integrally formed.

In an embodiment of the present invention, the collimator includes a first lens, a second lens and a limiting member, the limiting member is installed in the cavity, and the first lens and the second lens Lenses are provided at both ends of the limiting member, and the first lens is provided at an end of the limiting member close to the incident end.

In an embodiment of the present invention, the incident surface and the exit surface of the first lens are both convex surfaces, and the entrance surface and the exit surface of the second lens are both concave surfaces.

In one embodiment of the present invention, the optical component further includes a protective goggle, which is disposed on a side of the cavity close to the exit end and spaced apart from the focusing lens.

In one embodiment of the present invention, a limiting portion is protruding from the inner wall of the cavity, and the focusing lens and the protective mirror are respectively provided in contact with both sides of the limiting portion;

And/or, the incident surface of the focusing lens is a flat surface, and the exit surface is a convex surface.

In an embodiment of the present invention, the optical component further includes a plurality of gaskets and fixing rings, and any adjacent ones of the collimator, the beam splitter, the multi-focus diffractive element, and the focusing lens There is a washer between the two, and the fixing ring is threadedly connected to the housing and presses one side of the washer in the axial direction.

In an embodiment of the present invention, the housing includes a front housing, a middle housing and a rear housing connected in sequence from the incident end to the exit end, and the collimator and the beam splitter are both located on the The front shell is close to one end of the middle shell, and the multi-focus diffraction element and the focusing lens are both disposed on one end of the middle shell close to the front shell.

The present invention also provides a laser treatment instrument, which includes any one of the above laser treatment handles.

The shell of the laser treatment handle according to the technical solution of the present invention is formed with a cavity extending along its axial direction and an incident end and an exit end located at both ends of the cavity. The laser enters the cavity from the incident end and is emitted from the exit end. Optical components such as collimators, beam splitters, multi-focus diffractive elements, and focusing lenses are installed in the cavity. After the laser enters the cavity, it first passes through the collimator, which converts the divergent laser beam into a collimated beam. Then the collimated beam passes through the beam splitter, which disperses the collimated beam into multiple micro-beams to form a two-dimensional beam matrix. The beam matrix composed of multiple beams passes through the multi-focus diffraction element and the focusing lens in sequence. Multiple beams are diffracted and focused at a specific position from the exit end, so that the laser beam matrix at the two-dimensional level forms a focusing lattice at the three-dimensional level, which not only achieves tissue treatment in the two-dimensional plane area, but also achieves The purpose of treating different depth tissues of the skin improves the therapeutic effect of laser treatment.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of an embodiment of the laser treatment handle of the present invention;

Figure 2 is an exploded schematic diagram of the laser treatment handle shown in Figure 1;

Figure 3 is a left view of the laser treatment handle of the present invention in Figure 1;

Figure 4 is a cross-sectional view along the A-A’ direction of Figure 3;

Figure 5 is a schematic diagram of the beam focus position of the laser treatment handle of the present invention;

Figure 6 is a schematic diagram of beam transmission of an embodiment of the optical component in the laser treatment handle of the present invention;

Figure 7 is a schematic diagram of beam transmission of another embodiment of the optical component in the laser treatment handle of the present invention;

Figure 8 is a schematic diagram of beam transmission of another embodiment of the optical component in the laser treatment handle of the present invention.

Explanation of reference numbers:

The realization of the purpose, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiment of the present invention are only used to explain the relationship between components in a specific posture (as shown in the drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

In the present invention, unless otherwise clearly stated and limited, the terms "connection", "fixing", etc. should be understood in a broad sense. For example, "fixing" can be a fixed connection, a detachable connection, or an integral body; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In addition, descriptions such as "first", "second", etc. in the present invention are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. The words "and/or" and "and/or" appearing throughout the text have the same meaning, and both mean including three parallel solutions, taking "A and/or B as an example", including solution A, or solution B, or solution A and A solution that satisfies B at the same time. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor within the protection scope required by the present invention.

The present invention proposes a laser treatment handle 1.

As shown in FIGS. 1-4 , in one embodiment of the present invention, the laser treatment handle 1 includes a housing 10 and an optical component; the housing 10 is formed with a cavity 14a extending along its axial direction for laser propagation, and The incident end 111 and the exit end 131 are located at both ends of the cavity 14a; the optical component is located in the cavity 14a, and the optical component includes a collimator 21, a beam splitter 22, and a multi-focus diffraction device arranged sequentially along the axial direction of the housing 10 Element 23, focusing lens 24, the laser enters from the incident end 111, is converted into a collimated beam by the collimator 21, and then dispersed into multiple micro-beams by the beam splitter 22, and then diffracted by the multi-focus diffraction element 23 and the focusing lens 24 The focus is emitted from the exit end 131 , and finally multi-focus is focused in a three-dimensional space at a specific position away from the exit end 131 .

In this embodiment, the housing 10 includes a front housing 11 , a middle housing 12 and a rear housing 13 that are connected in sequence. The end of the front housing 11 away from the middle housing 12 is the incident end 111 , and the end of the rear housing 13 away from the middle housing 12 is the incident end 111 . Outgoing end 131. The incident end 111 is connected to the laser emitting module, and the exit end 131 is in contact with the skin. The laser enters from the incident end 111, passes through the optical components provided in the cavity 14a, and then emits from the exit end 131. The front shell 11 and the middle shell 12, and the rear shell 13 and the middle shell 12 can be connected by threaded connection, plugging, etc. A cavity 14a is formed inside the casing 10 along its axial direction. The laser propagates in the cavity 14a. The shape of the casing 10 can be a cylinder to facilitate the processing and shaping of the casing 10 and the cavity 14a and reduce production costs. The cross-sectional size of the cavity 14a and the sizes of the exit end 131 and the entrance end 111 can be designed according to the size of the optical element and the size of the area that needs to be treated, and are not further limited here.

The optical component is used to process the incident laser light. The incident laser light passes through the collimator 21, the beam splitter 22, the multi-focus diffraction element 23 and the focusing lens 24 which are arranged in the cavity 14a and are parallel to each other. The collimator 21 is used to convert the laser beam into a collimated beam. Its working principle is to use the principle of refraction under the action of the lens to convert the divergent laser beam into a collimated beam. The collimator 21 realizes the function of adjusting the divergent laser beam into a collimated laser beam, so that during the subsequent beam splitting and diffraction process of the beam, the resulting beam matrix and focus point are more regular and controllable, which improves the efficiency of the laser beam. Treatment precision.

The beam splitter 22 is a two-dimensional binary optical element based on the principle of phase diffraction grating. After a laser beam is adjusted into a collimated beam by the collimator 21, it is divided into multiple micro-beams under the action of the beam splitter 22. array. The shape distribution of the microbeam array can be circular or rectangular. The beam splitter 22 diffracts the one-dimensional beam into a two-dimensional beam array, so that the laser treatment handle can realize laser treatment of tissue on a two-dimensional plane.

The multi-focus diffraction element 23 diffracts the incident laser light. After passing through the multi-focus diffraction element 23 and then passing through the focusing lens 24, the multiple micro-beams will form multiple focus points with nearly equal spacing along the propagation direction of the optical path, and the distance between each focus point will be nearly equal. The energy is also basically the same. The multi-focus diffraction element 23 diffracts the two-dimensional beam array into a three-dimensional beam array to treat tissues at different depths.

The focusing lens 24 enables multi-focus focusing of each micro-beam on its optical axis. Focusing lenses 24 with different refractive indexes and focal lengths can be used to meet the needs of treating different treatment depths. The treatable depth of the laser treatment handle 1 in the present invention is 0.3~3mm. At the same time, a protective mirror 25 can also be added to the exit end 131 to protect the optical components in the cavity 14a and prevent dust and debris generated during the treatment process from entering the cavity 14a and causing contamination of the optical components.

The laser treatment handle 1 proposed by the present invention is provided with a collimator 21, a beam splitter 22, a multi-focus diffraction element 23 and a focusing lens 24 in the cavity 14a of the housing 10. Under the action of these optical components, the laser will A divergent laser beam, after refraction, diffraction and focusing, forms multiple light arrays with a certain focus depth on a three-dimensional level, achieving the purpose of laser treatment of skin tissues at different depths and improving the effectiveness of laser treatment. Effect.

As shown in FIGS. 4-6 , in one embodiment of the present invention, the beam splitter 22 , the multi-focus diffractive element 23 , and the focusing lens 24 are arranged at intervals along the axial direction of the cavity 14 a.

In this embodiment, the cross-sectional shape of the beam splitter 22, the multi-focus diffractive element 23, and the focusing lens 24 may be circular, which is the same as the cross-sectional shape of the cavity 14a, to facilitate installation. The beam is diffracted into multiple beams under the action of the beam splitter 22, and the multiple beams are evenly spaced on the XY plane. The multi-focus diffraction element 23 and the focusing lens 24 can simultaneously obtain multiple focuses in the propagation direction, that is, the Z direction, thereby obtaining a three-dimensional focus light array in the XYZ direction to achieve the purpose of treating tissues of different depths within a certain range of the skin. The incident surface of the focusing lens 24 is a plane, and the exit surface is convex. The beam splitter 22, the multi-focus diffractive element 23, and the focusing lens 24 are arranged at intervals along the axial direction of the cavity 14a, and can be between the optical components arranged at intervals. Gaskets 26 such as silicone rings and rubber rings are provided, or threads are provided between the optical components and the cavity wall of the cavity 14a, and the gaps between these optical components are adjusted through threading. The range of the light array in the XY direction can be adjusted by using different beam splitters 22, and the range of the light array in the Z direction can be adjusted by using multi-focus diffractive elements 23 with different working distances, thereby adapting to different treatment ranges and treatments. Depth needs to improve the practicality and flexibility of the laser treatment handle 1.

As shown in FIGS. 7 and 8 , in one embodiment of the present invention, the multi-focus diffraction element 23 and the beam splitter 22 are of an integrated structure; or the multi-focus diffraction element 23 and the focusing lens 24 are of an integrated structure.

In this embodiment, the multi-focus diffraction element 23 and the beam splitter 22 can be designed as an integrated structure, that is, the incident part of the combined lens is the beam splitter 22 and the exit part is the multi-focus diffraction element 23. It is understandable that when each optical component is set up separately, the single optical component needs to be cut, polished, coated and other processing processes, but with the one-piece structure, two optical components can be processed at the same time, thereby reducing production costs. and process complexity. At the same time, during assembly, the one-piece structure can reduce the assembly process, reduce structural complexity, and improve assembly efficiency. In other embodiments, the multi-focus diffractive element 23 and the focusing lens 24 can also be designed as an integrated structure.

As shown in FIG. 2 and FIG. 4 , in one embodiment of the present invention, the collimator 21 includes a first lens 211, a second lens 213 and a limiting member 212. The limiting member 212 is installed in the cavity 14a. A lens 211 and a second lens 213 are provided at both ends of the limiting member 212 , and the first lens 211 is provided at an end of the limiting member 212 close to the incident end 111 .

In this embodiment, the cross-sectional shape of the first lens 211, the second lens 213 and the stopper 212 is the same as the cross-sectional shape of the cavity 14a, such as circular, to facilitate installation. The limiting member 212 has a penetrating structure at both ends, and a cavity for laser propagation is formed inside. The limiting member 212 is in contact with the inner wall of the cavity 14a. The end surfaces of both ends of the limiting member 212 are concavely provided with a circle of grooves, and the first lens 211 and the second lens 213 are respectively arranged in the grooves at both ends of the limiting member 212 . By providing the limiting member 212 to limit the distance between the first lens 211 and the second lens 213, the accuracy of the beam adjustment by the collimator 21 is improved. The first lens 211 adopts an aspherical lens, which has a better radius of curvature to converge the light beams to the same point, thereby improving the optical quality and thereby improving the accuracy of laser treatment.

Please continue to refer to FIGS. 2 and 4 . In one embodiment of the present invention, the incident surface and the exit surface of the first lens 211 are both convex surfaces, and the incident surface and the exit surface of the second lens 213 are both concave surfaces.

In this embodiment, the incident surface and the exit surface of the first lens 211 are designed as convex surfaces, and the incident surface and the exit surface of the second lens 213 are designed as concave surfaces, so that when the laser passes through the first lens 211 and the second lens 213, Multiple refraction adjusts the divergent laser beam into a collimated beam, so that the laser can obtain a regular three-dimensional light array after subsequent diffraction and focusing, which improves the accuracy of laser treatment. In other embodiments, the incident surface of the first lens 211 can also be designed as a concave surface and the exit surface as a plane, and the matching second lens 213 can have a plane entrance surface and a convex exit surface. As long as the divergent laser beam can be converted into a collimated beam, there is no further limitation here.

Please continue to refer to FIGS. 2 and 4 . In one embodiment of the present invention, the optical component further includes a protective mirror 25 . The protective mirror 25 is disposed on the side of the cavity 14 a close to the exit end 131 and is spaced apart from the focusing lens 24 .

In this embodiment, the protective glasses 25 mainly protect the optical components in the cavity 14a. When impurities such as dust adhere to the surfaces of the collimator 21, the beam splitter 22, the multi-focus diffractive element 23, and the focusing lens 24, , will affect the effectiveness and safety of laser treatment. Therefore, the protective goggles 25 are arranged on the side of the cavity 14a close to the exit end 131 to prevent external dust and other impurities from entering, thereby improving the accuracy of the laser treatment handle 1.

As shown in FIG. 4 , in one embodiment of the present invention, a limiting portion 121 is protruding from the inner wall of the cavity 14a, and the focusing lens 24 and the protective mirror 25 are respectively in contact with both sides of the limiting portion 121;

And/or, the entrance surface of the focusing lens 24 is a flat surface, and the exit surface is a convex surface.

In this embodiment, the limiting portion 121 can be arranged around a platform on the inner wall of the cavity 14a. The cross-sectional shape of the limiting portion 121 can be annular. The annular limiting portion 121 has a space for laser propagation along its axial direction. channel. The side of the limiting portion 121 facing the incident end 111 is used to support and place the focusing lens 24 , and the other side facing the exit end 131 is used to place the protective glasses 25 . The limiting portion 121 supports the focusing lens 24 and the protective mirror 25 to facilitate the installation of the lenses. The protective goggles 25 are separated from other optical components by the limiting portion 121. When the surface of the protective goggles 25 accumulates dust after being used for a long time, the protective goggles 25 can be disassembled or replaced separately, thereby improving the convenience of the laser treatment handle 1.

When the limiting portion 121 is protruding from the inner wall of the cavity 14a or not, the incident surface of the focusing lens 24 is designed as a flat surface and the exit surface is designed as a convex surface, so that the laser beam can be focused after passing through the focusing lens 24 . In other embodiments, the focusing lens 24 may also be a positive meniscus lens, that is, the incident surface is a concave surface and the exit surface is a convex surface, so as to focus the incident light, which is not further limited here.

Please continue to refer to Figure 4. In one embodiment of the present invention, the optical assembly also includes a plurality of gaskets 26 and fixed rings 27, any of the collimator 21, the beam splitter 22, the multi-focus diffractive element 23, and the focusing lens 24. A washer 26 is provided between the two adjacent ones. The fixing ring 27 is threadedly connected to the housing 10 and presses one side of the washer 26 in the axial direction.

In this embodiment, a gasket 26 and a fixing ring 27 are provided between the optical components to play a role in fixing and limiting. The material of the gasket 26 can be silicone, rubber, etc., has a certain degree of elasticity and flexibility, and plays a role of limiting and buffering the optical components to prevent the optical components from being scratched during installation. At the same time, the thickness of the gasket 26 can be various. According to the different requirements of the distance between different optical components, the gasket 26 of different thicknesses is provided to achieve the position limiting function. Both ends of the fixing ring 27 are threadedly connected to the inner wall of the middle case 12. One side of the fixing ring 27 presses against the washer 26, and can rotate and squeeze the washer 26, thereby stably fixing each optical component inside the cavity 14a. The method of using the fixing ring 27 and the gasket 26 to fix the optical components improves the convenience of installation. At the same time, each optical component is detachably connected, and optical components with different material properties can be matched and replaced according to the needs of different treatment ranges and treatment depths. Or adjust the distance between the optical components to obtain lasers with different treatment ranges in three-dimensional directions, so that the laser treatment handle 1 can match more treatment scenes, thereby improving the practicality and convenience of the laser treatment handle 1.

As shown in FIGS. 1 to 4 , in one embodiment of the present invention, the housing 10 includes a front housing 11 , a middle housing 12 and a rear housing 13 that are sequentially connected in the direction from the incident end 111 to the exit end 131 . The detector 21 and the beam splitter 22 are both located at one end of the front housing 11 close to the middle housing 12 , and the multi-focus diffraction element 23 and the focusing lens 24 are both located at one end of the middle housing 12 close to the front housing 11 .

Optionally, the two joints of the front case 11, the middle case 12 and the rear case 13 can be connected through threaded connection, plug-in connection, etc. In this embodiment, the front shell 11 and the middle shell 12 are connected by threads to improve connection stability, and the rear shell 13 and the middle shell 12 are plugged in to facilitate disassembly and assembly. At least one sealing ring is provided at the insertion point to improve the intensity of the insertion and the sealing effect in the cavity 14a. The cavity wall of the cavity 14a at one end of the front shell 11 close to the middle shell 12 is recessed with a clamping groove. The collimator 21 is placed in the clamping slot, and the incident surface of the collimator 21 is in contact with the groove wall of the clamping slot. A gasket 26 is provided at the exit surface. The beam splitter 22 is disposed at one end of the front shell 11 close to the middle shell 12 and is threadedly connected to the inner wall of the cavity 14a. The beam splitter 22 abuts the gasket 26 on one side of the collimator 21 and rotates through the threads to squeeze the collimator. The gasket 26 makes the collimator 21 stably fixed in the cavity 14a. The multi-focus diffraction element 23 and the focusing lens 24 are disposed in the cavity 14a of the middle housing 12 . The exit surface of the focusing lens 24 is in contact with the limiting portion 121 , and a gasket 26 is provided between the incident surface of the focusing lens 24 and the exit surface of the multi-focus diffraction element 23 . A washer 26 is also provided on the incident surface of the multi-focus diffraction element 23, and a fixing ring 27 is provided on the other side of the washer 26. The fixing ring 27 is threadedly connected to the inner wall of the middle case 12, and rotates to squeeze the washer 26 to The multi-focus diffractive element 23 and the focusing lens 24 are stably fixed in the middle housing 12 .

The protective glass 25 is disposed on the other side of the limiting portion 121 relative to the focusing lens 24 , and a gasket 26 and a fixing ring 27 are sequentially provided at the exit surface of the protective glass 25 to fix the protective glass 25 . The rear shell 13 is inserted into the cavity of the middle shell 12 in a plug-in manner, and presses against the fixing ring 27 used to fix the protective glasses 25 , further increasing the fixing strength of the protective glasses 25 .

The end of the rear shell 13 away from the front shell 11 , that is, the exit end 131 has a contact member 132 protruding from the end surface away from the incident end 111 . The contact member 132 has a cavity 14 a for laser propagation along its axial direction. , the two ends of the cavity 14a are connected, one end is connected to the end surface of the exit end 131, and the other end is in contact with the skin surface. The length of the contact member 132 along its axial direction can be determined from the energy focus position of the laser after exit to the end surface of the exit end 131. The distance is designed to match the laser energy focus or working range with the skin depth area that needs treatment, improving the accuracy of laser treatment.

In addition, the laser treatment handle 1 also includes an electrical connection cable 30 and a monitor 40 . The monitor 40 and the cable 30 are arranged outside the housing 10 . The monitor 40 is provided with a memory chip for storing information on the laser treatment handle 1. One end of the cable 30 is connected to the monitor 40, and the other end is connected to the laser control system. The connection signal of the monitor 40 is transmitted to Laser control system, and the control system controls the laser to emit or turn off the laser to achieve the purpose of starting or stopping laser treatment.

The present invention also proposes a laser treatment instrument (not shown). The laser treatment instrument includes any of the above laser treatment handles 1 .

The specific structure of the laser treatment handle 1 refers to the above-mentioned embodiments. Since the laser therapy instrument of the present invention adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments. Herein I won’t go into details one by one.

The laser therapy instrument also includes a laser (not shown). The laser can be a long pulse solid laser, a Q-switched solid laser, a picosecond solid laser, a CO ₂ laser, etc. The laser is connected to the incident end 111 of the laser treatment handle 1 through a light guide device. connection, the laser enters the laser treatment handle 1 through the incident end 111. By arranging the laser treatment handle 1 and the laser, the laser therapy instrument forms a multi-focus laser lattice on a three-dimensional level, which solves the problem that the existing laser therapy instrument cannot treat skin tissues of different depths and improves the effect of laser therapy.

The above descriptions are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformations made under the inventive concept of the present invention using the contents of the description and drawings of the present invention, or direct/indirect Application in other related technical fields is included in the scope of patent protection of the present invention.

Claims (9)

1. A laser treatment handle, characterized in that the laser treatment handle includes: A housing formed with a cavity extending along its axial direction for laser propagation, and an incident end and an exit end located at both ends of the cavity; and Optical component, the optical component is located in the cavity, the optical component includes a collimator, a beam splitter, a multi-focus diffraction element, and a focusing lens arranged in sequence along the axial direction of the housing; Laser enters from the incident end, is converted into a collimated beam by the collimator, is dispersed into a plurality of micro-beams by the beam splitter, and is then separated from the beam by the multi-focus diffraction element and the focusing lens. It is emitted from the exit end and finally focused at a multi-focus point in the three-dimensional space at a specific position from the exit end; The collimator includes a first lens, a second lens and a limiter. The limiter is installed in the cavity. The first lens and the second lens are arranged on the limiter. At both ends, the first lens is located at one end of the limiting member close to the incident end. The end surfaces of the limiting member at both ends are concave with a circle of grooves. The first lens and the second lens are respectively provided. in the grooves at both ends of the limiting member to limit the distance between the first lens and the second lens. 2. The laser treatment handle according to claim 1, wherein the beam splitter, the multi-focus diffraction element and the focusing lens are arranged at intervals along the axial direction of the cavity. 3. The laser treatment handle according to claim 1, wherein the multi-focus diffraction element and the beam splitter are integrally formed structures; Or, the multi-focus diffractive element and the focusing lens are integrally formed. 4. The laser treatment handle according to any one of claims 1 to 3, wherein the incident surface and the exit surface of the first lens are both convex surfaces, and the incident surface and exit surface of the second lens are both convex. For concave surface. 5. The laser treatment handle according to any one of claims 1 to 3, wherein the optical component further includes a protective goggle, and the protective goggle is disposed on a side of the cavity close to the exit end. , and set apart from the focusing lens. 6. The laser treatment handle according to claim 5, wherein a limiting portion is protruding from the inner wall of the cavity, and the focusing lens and the protective mirror are respectively in contact with both sides of the limiting portion. ; And/or, the incident surface of the focusing lens is a flat surface, and the exit surface is a convex surface. 7. The laser treatment handle according to any one of claims 1-3, wherein the optical component further includes a plurality of gaskets and fixing rings, the collimator, the beam splitter, the A gasket is disposed between any two adjacent ones of the multi-focus diffractive element and the focusing lens. The fixing ring is threadedly connected to the housing and presses one side of the gasket in the axial direction. 8. The laser treatment handle according to any one of claims 1 to 3, wherein the housing includes a front shell, a middle shell and a rear shell connected in sequence from the incident end to the exit end, and the The collimator and the beam splitter are both located at an end of the front housing close to the middle housing, and the multi-focus diffraction element and the focusing lens are both located at an end of the middle housing close to the front housing. 9. A laser treatment instrument, characterized by comprising the laser treatment handle according to any one of claims 1-8.