Laser therapy handpiece

Abstract

The present invention relates to the field of laser treatment technology, and specifically discloses a laser treatment handpiece, the laser treatment handpiece comprises a handpiece housing, an optical fiber adapter, a locking pin structure and an optical fiber, the optical fiber adapter comprises an adapter body and a lens unit, the lens unit is arranged in the optical fiber adapter, the optical fiber is connected to the handpiece housing through the optical fiber adapter, the lens unit can block the light-emitting end face of the optical fiber, the locking pin structure is arranged in the handpiece housing, the outer wall of the adapter body is provided with a radially concave first positioning groove, and the locking pin structure is configured to be positioned and matched with the first positioning groove; in the above scheme, when replacing the laser treatment handpiece, the optical fiber is pulled out together with the optical fiber adapter and connected to the laser treatment handpiece to be replaced, the lens unit in the optical fiber adapter can protect the light-emitting end face of the optical fiber, avoid the light-emitting end face of the optical fiber and the external environment from being scratched, thereby ensuring the light-emitting quality of the optical fiber, and ensuring the accuracy of laser treatment and the effect of treatment.

Description

Technical Field

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

[0002] Cosmetic laser treatment uses a laser instrument to emit a light beam of a specific wavelength, which acts on the skin. It can destroy pigments, stimulate collagen regeneration and close capillaries, thereby achieving the cosmetic effect of improving skin problems and improving skin quality.

[0003] In the related art, laser therapy can be applied to treat multiple parts and diseases. Different treatment parts and treatment purposes require different spot sizes and / or spot shapes. Therefore, different laser therapy handpieces are usually required to achieve different treatment effects. When replacing the laser therapy handpiece, the optical fiber needs to be separated from the laser therapy handpiece currently in use and connected to the laser therapy handpiece to be used. However, the optical fiber is easily contaminated by dust in the air due to lack of protection measures, and the optical path of the connector may be offset after multiple replacements, which eventually leads to problems such as spot deformation and uneven light intensity distribution in the laser therapy handpiece, that is, the quality of the emitted laser beam is reduced, affecting the accuracy and effect of laser therapy. Summary of the invention

[0004] The invention discloses a laser treatment hand tool to solve the above technical problems existing in the related technology.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] The present application provides a laser therapy handpiece, which includes a handpiece housing, an optical fiber adapter, a locking pin structure, and an optical fiber, wherein the optical fiber adapter includes an adapter body and a lens unit, the adapter body has an installation channel extending axially therethrough, the lens unit is disposed in the installation channel, the optical fiber is connected to the handpiece housing through the optical fiber adapter, and the lens unit is configured to shield the light-emitting end face of the optical fiber when the optical fiber is located in the installation channel.

[0007] The locking pin structure is arranged on the hand tool housing, and the outer wall of the adapter body is provided with a radially inwardly concave first positioning groove, and the first positioning groove is arranged around the outer wall of the adapter body. The locking pin structure is configured to be positioned and matched with the first positioning groove, so that the adapter body is connected and fixed to the hand tool housing.

[0008] Furthermore, the installation channel includes a first channel section and a second channel section, the opening size of the second channel section is larger than the opening size of the first channel section to form a step surface between the two, part of the optical fiber is located in the first channel section, the lens unit is arranged in the second channel section, and the lens unit is in contact with the step surface.

[0009] Furthermore, the installation channel also includes an extension section distributed at the far end of the second channel section, and an opening size of the extension section is larger than an opening size of the second channel section.

[0010] Furthermore, along the axial direction of the adapter body, the sum of the extension length of the second channel section and the extension length of the extension section is greater than the extension length of the first channel section.

[0011] Furthermore, the optical fiber adapter also includes a push piece, which has a light beam through hole extending axially therethrough, and is threadedly engaged in the installation channel. The push piece is configured to apply a push force to the lens unit so that the lens unit is pressed against the step surface.

[0012] Furthermore, the outer wall of the adapter body is also provided with a threaded section, and the end of the optical fiber is provided with a threaded docking piece, and the threaded docking piece is threadably matched with the threaded section to connect the adapter body and the optical fiber.

[0013] Furthermore, the adapter body is further provided with a second positioning groove on the threaded section, the end of the optical fiber is provided with an axially extending positioning protrusion, and the second positioning groove is positioned and matched with the positioning protrusion.

[0014] Furthermore, the locking pin structure includes a locking pin and an elastic reset member, the locking pin is movably arranged on the hand tool housing, and part of the locking pin is exposed outside the hand tool housing, and the elastic reset member is configured to apply an elastic force to the locking pin so that part of the locking pin is located in the first positioning groove to limit the axial movement of the optical fiber adapter along the hand tool housing.

[0015] Further, the lock pin has an avoidance notch, and part of the adapter body is located in the avoidance notch. The lock pin has a locked state and an unlocked state. In the locked state, the avoidance notch and the adapter body are staggered so that the lock pin is positioned and matched in the first positioning groove. In the unlocked state, the avoidance notch is coaxial with the adapter body to avoid the adapter body.

[0016] Furthermore, the laser therapy handpiece also includes a docking piece, which is arranged at the proximal end of the handpiece shell, and the docking piece has a docking channel that penetrates along its axial direction and a locking pin channel connected to the docking piece, the adapter body is arranged in the docking channel, and the locking pin is movably arranged in the locking pin channel.

[0017] Furthermore, the optical fiber adapter also includes at least two sealing members, and the sealing members are arranged on the proximal side of the first positioning groove.

[0018] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0019] The laser therapy handpiece of the present application, when replacing the laser therapy handpiece to adjust the spot size and / or spot shape, the optical fiber and the optical fiber adapter are pulled out together and docked with the laser therapy handpiece to be replaced. During this process, the lens unit in the optical fiber adapter can protect the light-emitting end face of the optical fiber to avoid scratches between the light-emitting end face of the optical fiber and the external environment, thereby ensuring the light-emitting quality of the optical fiber and ensuring the accuracy and effectiveness of the laser therapy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 is a schematic structural diagram of a laser treatment handpiece according to an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of the docking of the hand tool housing and the optical fiber according to an embodiment of the present application;

[0023] Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0024] Figure 4 is a schematic structural diagram of an optical fiber adapter according to an embodiment of the present application;

[0025] Figure 5 is a schematic cross-sectional view of the adapter body of an embodiment of the present application;

[0026] Figure 6 is a schematic cross-sectional view of an optical fiber adapter according to an embodiment of the present application;

[0027] Figure 7 is a schematic diagram of the cooperation between the locking pin structure and the optical fiber adapter of the embodiment of the present application;

[0028] Figure 8 is a schematic structural diagram of a lock pin in an embodiment of the present application;

[0029] Fig. 9 is a schematic structural diagram of a docking piece according to an embodiment of the present application;

[0030] Fig.10 It is a locking schematic diagram of the locking pin structure of an embodiment of the present application.

[0031] In the figure:

[0032] 100, hand tool housing; 200, optical fiber adapter; 210, adapter body; 211, installation channel; 2111, first channel section; 2112, second channel section; 2113, step surface; 2114, extension section; 212, first positioning groove; 213, threaded section; 214, second positioning groove; 220, lens unit; 230, push member; 231, light beam through hole; 240, sealing member; 300, locking pin structure; 310, locking pin; 311, avoidance gap; 320, elastic reset member; 400, optical fiber; 410, threaded docking member; 500, docking member; 510, docking channel; 520, locking pin channel. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] Laser therapy can be applied to treat multiple parts and diseases, and different treatment parts and treatment purposes require different spot sizes and / or spot shapes. In the relevant technology, the spot size and / or spot shape that a single laser treatment handpiece can provide is very limited, and it is difficult to meet the actual needs during laser treatment. Therefore, it is necessary to replace different laser treatment handpieces to achieve the treatment purpose. However, in the process of pulling out the optical fiber from the original laser treatment handpiece and docking it with the new laser treatment handpiece, the light-emitting end face at the far end of the optical fiber is exposed to the external environment. The light-emitting end face and the external environment are very likely to be scratched, worn, and contaminated with dust, which causes the laser beam emitted from the light-emitting end face to dissipate heat, which in turn causes the formed spot shape to become irregular, and causes problems such as spot deformation and uneven light intensity distribution, which affects the effect of laser treatment.

[0036] The following is combined with Figures 1 to 10 , the laser therapy handpiece provided in the embodiment of the present application is described in detail through specific embodiments and their application scenarios.

[0037] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The embodiment of the present application discloses a laser treatment handpiece, which is applied to cosmetic laser treatment. The laser treatment handpiece includes a handpiece housing 100, an optical fiber adapter 200, a locking pin structure 300 and an optical fiber 400, wherein the handpiece housing 100 is a basic component of the laser treatment handpiece, and can provide an installation basis for the optical fiber adapter 200 and the locking pin structure 300. The distal end of the optical fiber 400 is connected to the handpiece housing 100 through the optical fiber adapter 200. The locking pin structure 300 can lock the optical fiber adapter 200 to prevent the optical fiber adapter 200 and the optical fiber 400 from detaching from the handpiece housing 100. The operator can hold the handpiece housing 100 to perform laser treatment on a target to be treated (such as pigment particles, acne) in the human skin.

[0038] Specifically, see Figure 2 , Figure 4 and Figure 6 The optical fiber adapter 200 includes an adapter body 210 and a lens unit 220. Exemplarily, the adapter body 210 can be a cylindrical structure. The adapter body 210 has an installation channel 211 that runs through its axial direction. The installation channel 211 can provide an accommodating space for the distal end of the optical fiber 400. The distal end of the optical fiber 400 can be accommodated in the installation channel 211. The lens unit 220 is arranged in the installation channel 211 and can shield the light-emitting end face of the optical fiber 400.

[0039] In the embodiment of the present application, the optical fiber 400 is connected and fixed to the optical fiber adapter 200, and the optical fiber adapter 200 is detachably connected to the proximal end of the handpiece housing 100, so that when the laser treatment handpiece is replaced and used, the optical fiber adapter 200 and the optical fiber 400 can be removed and separated from the handpiece housing 100 together.

[0040] Specifically, see Figure 2 , Figure 3 , Figure 4 and Figure 7 The locking pin structure 300 is arranged on the hand tool housing 100. The locking pin structure 300 has a locked state and an unlocked state. The outer wall of the adapter body 210 is provided with a radially concave first positioning groove 212. When the locking pin structure 300 is in the locked state, the locking pin structure 300 is positioned and matched with the first positioning groove 212, so as to realize the connection between the optical fiber 400 and the hand tool housing 100. When the locking pin structure 300 is in the unlocked state, the optical fiber adapter 200 can be pulled out of the hand tool housing 100.

[0041] Based on the above technical solution, when it is necessary to replace the laser treatment handpiece to adjust the spot size and / or spot shape, the locking pin structure 300 can be switched from a locked state to an unlocked state, and then the fiber optic adapter 200 and the optical fiber 400 can be pulled out together and docked with the laser treatment handpiece to be used to produce the required spot size and / or spot shape. In the process of pulling out and docking with the new handpiece housing 100, the lens unit 220 in the fiber optic adapter 200 can always protect the light-emitting end face of the optical fiber 400 at the far end, so as to avoid the light-emitting end face of the optical fiber 400 at the far end from colliding or scratching with the external environment during the switching process, thereby avoiding scratches or damage to the light-emitting end face of the optical fiber 400, thereby avoiding scattering of the laser beam at the light-emitting end face, thereby ensuring the light-emitting quality of the optical fiber 400, and making the emitted laser beam have high uniformity and stability, thereby ensuring the accuracy and effect of the treatment.

[0042] At the same time, based on the first positioning groove 212 being arranged around the adapter body 210, during the process of installing the optical fiber adapter 200, the operator does not need to deliberately circumferentially position the optical fiber adapter 200, so that the optical fiber adapter 200 can be installed from the proximal end of the hand tool housing 100 with greater freedom, which can significantly improve the convenience of docking the optical fiber adapter 200 with the hand tool housing 100.

[0043] In the examples of this application, see Figure 3 , Figure 4 , Figure 5 and Figure 6The installation channel 211 includes a first channel section 2111 and a second channel section 2112. The first channel section 2111 is distributed at the proximal end of the second channel section 2112. The opening size of the second channel section 2112 is larger than the opening size of the first channel section 2111, so that a step surface 2113 is formed therebetween. The distal end portion of the optical fiber 400 extends into the first channel section 2111. The lens unit 220 is disposed in the second channel section 2112. The step surface 2113 can play a positioning role for the installation of the lens unit 220, and the lens unit 220 fits the step surface 2113.

[0044] In some embodiments of the present application, glue may be applied on the step surface 2113 so that the lens unit 220 is glued to the step surface 2113 , thereby achieving fixation of the lens unit 220 and the adapter body 210 .

[0045] In some embodiments of the present application, the optical fiber adapter 200 may further include a push piece 230, which has a beam through hole 231 extending axially therethrough. The push piece 230 is threadedly engaged in the installation channel 211. When the push piece 230 is screwed in, the push piece 230 can apply a push force to the lens unit 220, so that the lens unit 220 abuts against the step surface 2113. That is, the push piece 230 and the step surface 2113 together clamp the lens unit 220 so that the lens unit 220 is fixed in the installation channel 211, and the laser beam transmitted by the optical fiber 400 can sequentially pass through the lens unit 220 and the beam through hole 231 to be emitted to the far end. Compared with the adhesive fixing method, the push method is used to make the lens unit 220 fit the step surface 2113, which has the advantage of convenient assembly.

[0046] In some embodiments of this application, please continue to refer to Figure 5 and Figure 6 The installation channel 211 is further provided with at least one extension section 2114 at the far end of the second channel section 2112. The opening size of the extension section 2114 is larger than the opening size of the second channel section 2112. With such a configuration, during the process of inserting the lens unit 220 and the push member 230, both can easily pass through the extension section 2114 and be assembled into place.

[0047] In a further technical solution, along the axial direction of the adapter body 210, the sum of the extension length of the second channel section 2112 and the extension length of the extension section 2114 is greater than the extension length of the first channel section 2111. In this arrangement, based on the extension of the extension section 2114 in the axial direction of the adapter body 210, the lens unit 220 can be hidden in a deeper position in the installation channel 211, that is, away from the distal end face of the adapter body 210, so that during the switching of the laser treatment handpiece, the lens unit 220 is also difficult to be exposed to the external environment, and the lens unit 220 can be effectively prevented from being scratched or damaged by contact with the external environment. That is to say, the embodiment of the present application not only protects the light-emitting end face of the optical fiber 400 by setting the lens unit 220, but also protects the lens unit 220 to a certain extent by setting the distribution position of the lens unit 220 in the adapter body 210, thereby ensuring the light-emitting quality of the laser treatment handpiece.

[0048] In the examples of this application, see Figure 2 , Figure 3 and Figure 4 The optical fiber 400 can be connected and fixed to the optical fiber adapter 200 by means of a threaded connection. Specifically, a threaded section 213 is provided on the portion of the adapter body 210 exposed to the hand tool housing 100, and a threaded docking piece 410 is provided on the end of the optical fiber 400. The threaded docking piece 410 can be a threaded sleeve. By rotating the threaded docking piece 410 and threading it with the threaded section 213, a stable connection between the two can be achieved.

[0049] In a further technical solution, an axially extending positioning protrusion (not shown) is provided at the end of the optical fiber 400, and a second positioning groove 214 is provided on the threaded section 213 of the adapter body 210. When connecting the optical fiber 400 and the adapter body 210, the positioning protrusion can be first engaged in the second positioning groove 214 to prevent the optical fiber 400 and the adapter body 210 from rotating, and then the threaded docking part 410 is rotated to achieve connection and fixation.

[0050] In the examples of this application, see Figure 2 , Figure 7 , Figure 8 and Fig.10The lock pin structure 300 includes a lock pin 310 and an elastic reset member 320, wherein the lock pin 310 is movably disposed on the hand tool housing 100, and the elastic reset member 320 is connected to the lock pin 310. The elastic reset member 320 is configured to apply an elastic force to the lock pin 310 so that a portion of the lock pin 310 is located in the first positioning groove 212, thereby locking the optical fiber adapter 200. Exemplarily, the lock pin 310 can be movably disposed on the hand tool housing 100 along a direction perpendicular to the axial direction of the hand tool housing 100, and the elastic reset member 320 can be a spring, one end of the elastic reset member 320 is fixedly disposed, and the other end of the elastic reset member 320 abuts against the lock pin 310, so that a portion of the lock pin 310 is clamped in the first positioning groove 212, thereby limiting the optical fiber adapter 200 to move along the axial direction of the hand tool housing 100 and to be separated from the hand tool housing 100. It can be understood that the lock pin 310 has a portion exposed outside the hand tool housing 100 , and the operator can perform an unlocking operation through the portion of the lock pin 310 exposed outside the hand tool housing 100 .

[0051] In some embodiments of the present application, the lock pin 310 has an avoidance notch 311. For example, the avoidance notch 311 can be an arc-shaped notch, and part of the adapter body 210 is located in the avoidance notch 311. In the locked state, the avoidance notch 311 and the adapter body 210 are offset so that part of the lock pin 310 can be snapped into the first positioning groove 212 of the adapter body 210, and in the unlocked state, the avoidance notch 311 is coaxial with the adapter body 210, so that the adapter body 210 can move axially and be separated from the handpiece housing 100.

[0052] Based on the above technical solution, by setting an avoidance notch 311 on the lock pin 310, the lock pin 310 has parts distributed on both sides of the axial direction of the adapter body 210. In this way, in the locked state, the lock pin 310 is engaged with the adapter body 210 at the part exposed to the handpiece housing 100 on the back. When switching from the locked state to the unlocked state, the operator only needs to press the part of the lock pin 310 exposed outside the handpiece housing 100 to achieve unlocking, which is ergonomic and easy to operate.

[0053] For further technical solutions, see Figure 2 , Figure 3 , Fig. 9 and Fig.10The laser treatment handpiece may further include a docking member 500, which is disposed at the proximal end of the handpiece housing 100 and can provide an installation basis for the optical fiber adapter 200 and the locking pin structure 300. For example, the docking member 500 can be fixed to the proximal end of the handpiece housing 100 by means of snap connection, adhesive connection, etc. Specifically, the docking member 500 has a docking channel 510 that runs through along its axial direction and a locking pin channel 520 that communicates with the docking channel. The optical fiber adapter 200 is installed in the docking channel 510, and the locking pin 310 is movably disposed in the locking pin channel 520. By setting the docking member 500, the installation accuracy of the optical fiber adapter 200 when docking with the handpiece housing 100 can be improved, and the optical fiber adapter 200 can be prevented from shaking significantly after being installed in the handpiece housing 100, thereby ensuring the collimated emission of the laser beam along the axial direction of the handpiece housing 100.

[0054] For further technical solutions, see Figure 4 and Figure 5 The optical fiber adapter 200 further includes at least two seals 240, and the seals 240 are distributed on the proximal side of the first positioning groove 212. For example, the seals 240 can be rubber or silicone seals. By providing the seals 240, it is possible to effectively prevent moisture, dust and other impurities from invading the interior of the laser treatment handpiece, and avoid contamination or damage to the light-emitting end face of the optical fiber 400. The seals 240 can ensure that the connection between the optical fiber adapter 200 and the docking member 500 is tight and seamless, thereby improving the stability of the overall structure and preventing loosening or falling off due to external factors.

[0055] By distributing at least two seals 240 on the proximal side of the first positioning groove 212, when the adapter body 210 is abutted by the locking pin 310, at least two seals 240 can provide multiple sealing guarantees, which can significantly improve the sealing effect and ensure the stable operation of the optical fiber 400 in a complex environment. In addition, the seals 240 arranged on the same side of the first positioning groove 212 can evenly distribute the clamping force of the locking pin 310 on the adapter body 210, reducing the risk of poor sealing or damage to the seal due to uneven force. At the same time, because the optical fiber adapter 200 is inserted into the docking channel 510 of the docking member 500 with an axial hole clearance fit, the laser beam emitted by the optical fiber 400 may not be in the exact center. By positioning the two seals 240, the laser beam emitted by the optical fiber 400 can be corrected to improve the problem of it not being in the exact center.

[0056] 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.

[0057] 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 treatment hand tool, characterized in that: It comprises a hand tool housing (100), an optical fiber adapter (200), a locking pin structure (300) and an optical fiber (400); wherein: The optical fiber adapter (200) comprises an adapter body (210) and a lens unit (220); the adapter body (210) has a mounting channel (211) extending through the adapter body along its axial direction; the lens unit (220) is arranged in the mounting channel (211); the optical fiber (400) is connected to the hand tool housing (100) via the optical fiber adapter (200); and the lens unit (220) is configured to shield a light-emitting end face of the optical fiber (400) when the optical fiber (400) is located in the mounting channel (211); The locking pin structure (300) is disposed on the hand tool housing (100); the outer wall of the adapter body (210) is provided with a radially inwardly concave first positioning groove (212); the first positioning groove (212) is arranged around the outer wall of the adapter body (210); the locking pin structure (300) is configured to be positioned and matched with the first positioning groove (212) so that the adapter body (210) is connected and fixed to the hand tool housing (100).

2. The laser therapy handpiece according to claim 1, characterized in that: The installation channel (211) comprises a first channel section (2111) and a second channel section (2112); the opening size of the second channel section (2112) is larger than the opening size of the first channel section (2111) so as to form a step surface (2113) between the two; a portion of the optical fiber (400) is located in the first channel section (2111); the lens unit (220) is disposed in the second channel section (2112), and the lens unit (220) is in contact with the step surface (2113).

3. The laser therapy handpiece according to claim 2, characterized in that: The installation channel (211) further comprises an extension section (2114) distributed at the far end of the second channel section (2112), and an opening size of the extension section (2114) is larger than an opening size of the second channel section (2112).

4. The laser therapy handpiece according to claim 3, characterized in that: Along the axial direction of the adapter body (210), the sum of the extension length of the second channel section (2112) and the extension length of the extension section (2114) is greater than the extension length of the first channel section (2111).

5. The laser treatment handpiece according to claim 2, characterized in that: The optical fiber adapter (200) further comprises a pushing member (230), the pushing member (230) having a light beam through hole (231) extending axially therethrough, the pushing member (230) being threadedly engaged in the mounting channel (211), and the pushing member (230) being configured to apply a pushing force to the lens unit (220) so that the lens unit (220) abuts against the step surface (2113).

6. The laser therapy handpiece according to claim 5, characterized in that: The outer wall of the adapter body (210) is further provided with a threaded section (213); the end of the optical fiber (400) is provided with a threaded docking piece (410); the threaded docking piece (410) and the threaded section (213) are threadably matched to connect the adapter body (210) and the optical fiber (400); The adapter body (210) is further provided with a second positioning groove (214) on the threaded section (213); an axially extending positioning protrusion is provided at the end of the optical fiber (400); and the second positioning groove (214) is positioned and matched with the positioning protrusion.

7. The laser therapy handpiece according to claim 1, characterized in that: The locking pin structure (300) comprises a locking pin (310) and an elastic reset member (320); the locking pin (310) is movably disposed on the hand tool housing (100), and a portion of the locking pin (310) is exposed outside the hand tool housing (100); the elastic reset member (320) is configured to apply an elastic force to the locking pin (310) so that a portion of the locking pin (310) is located in the first positioning groove (212), so as to limit the axial movement of the optical fiber adapter (200) along the hand tool housing (100).

8. The laser therapy handpiece according to claim 7, characterized in that: The locking pin (310) has an avoidance notch (311), and a portion of the adapter body (210) is located in the avoidance notch (311); The lock pin (310) has a locked state and an unlocked state. In the locked state, the avoidance notch (311) and the adapter body (210) are arranged in a staggered manner so that the lock pin (310) is positioned and fitted in the first positioning groove (212). In the unlocked state, the avoidance notch (311) and the adapter body (210) are coaxial so as to avoid the adapter body (210).

9. The laser therapy handpiece according to claim 7, characterized in that: The adapter body (210) is disposed in the docking channel (510), and the lock pin (310) is movably disposed in the lock pin channel (520).

10. The laser therapy handpiece according to claim 9, characterized in that: The optical fiber adapter (200) further comprises at least two sealing members (240), wherein the sealing members (240) are arranged on the proximal side of the first positioning groove (212).

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