Laser treatment hand tool, control method of laser treatment hand tool, laser treatment equipment and control method of laser treatment equipment

Abstract

The invention provides a laser treatment hand tool, a control method of the laser treatment hand tool, laser treatment equipment and a control method of the laser treatment equipment. The laser treatment hand tool comprises a hand tool handle body, an incident mirror assembly and a moving mirror assembly. The light path cavity of the hand tool handle body axially penetrates through the hand tool handle body, and the motor cavity is formed in one side of the light path cavity; the incident lens assembly is arranged at one end of the light path cavity, and the incident lens assembly comprises an incident lens barrel and a first lens arranged in the incident lens barrel; a driving motor of the movable lens assembly and a transmission assembly connected with the driving motor are arranged in the motor cavity, the second lens is located in the light path cavity and opposite to the first lens, the driving motor is used for driving the transmission assembly to drive the second lens to move relative to the first lens, and the communication cable is used for achieving communication connection between the driving motor and the host. Running parameters of the driving motor are fed back to the host, and control parameters output by the host are transmitted to the driving motor. The technical scheme is simple and stable in structure, easy to operate and control and high in system reliability.

Description

Technical Field

[0001] This application relates to the field of laser medical technology, and particularly to a laser treatment handpiece and its control method, a laser treatment device and its control method. Background Art

[0002] In the laser beauty industry, laser treatment devices are mainly used in medical institutions. By utilizing the interaction mechanism between laser energy and human skin tissue, the purpose of treating clinical indications is achieved, such as whitening, wrinkle removal, scar removal, treatment of skin pigmentation, stretch marks, etc. The laser treatment handpiece is a key component for clinical application in the laser treatment device and also the terminal output component of laser energy. The laser energy it outputs directly acts on the skin. It mainly uses the laser treatment handpiece to shape the output laser spot and cooperate with the software control program to adjust the spot output mode, etc., to achieve the treatment of different indications. Different handpieces can treat different indications. During the treatment process, different treatment handpieces can be replaced according to clinical needs for treatment, or a single handpiece can achieve different light output modes through different software control programs to achieve the purpose of treating multiple indications.

[0003] Since the shapes and sizes of the lesion areas on the skin surface are irregular, it is necessary to adjust the size of the output laser spot to adapt to different diseased tissues. Laser is a relatively dangerous energy output. During the clinical treatment process, if the laser spot is too large, its energy acts on areas outside the skin lesion area, which may cause additional harm to the healthy skin of the patient. If the laser spot is too small, multiple treatments are required, increasing the treatment time, reducing the treatment efficiency, and also increasing the economic burden on the patient.

[0004] The adjustment of the spot size is achieved through an optical lens group. Specifically, by moving the lenses to change the relative distance between the lenses, the beam size can be changed. The optical path principle is as Figures 1a to 1d shown. Several optical paths in the figure can be realized. For example, a convex lens - concave lens as Figure 1a shown, a convex lens - convex lens as Figure 1b shown, a convex lens - plano - convex lens as Figure 1c shown, a plano - concave lens - plano - convex lens as Figure 1d shown, etc. Different lens combinations can be adopted according to different requirements.

[0005] Most of the laser treatment handpieces with adjustable spot size on the market currently are realized by using the structures of spiral grooves and straight grooves. Specifically, one lens in the lens group is fixed on the straight groove barrel, and the other lens is loaded on the moving barrel. There is a boss on the moving barrel. During assembly, the moving barrel is simultaneously stuck in the straight groove of the straight groove barrel and the spiral groove of the spiral barrel. The relative rotation of the straight groove barrel and the spiral barrel sleeved together enables the moving barrel to move up and down. The straight groove barrel restricts the self-rotation of the moving barrel, and the spiral barrel realizes the up and down movement of the moving barrel. Some handpieces also have an electronic coding structure to detect the position of the moving barrel movement, feedback it to the control system to judge the spot size currently adjusted by the handpiece, so as to prepare for the next action of the system.

[0006] However, the above structure is too complex and not convenient for integrating electronic detection and control functions such as spot size detection, handpiece model identification, and skin contact detection. Moreover, during use, the control system cannot know which gear the current spot size is adjusted to. It is necessary to manually confirm the actual adjusted gear on the handpiece and ensure that the actual gear matches correctly with other laser parameters on the current user interface (UI). If not careful, there may be human errors and risks. Summary of the Invention

[0007] The technical problem to be solved by this application is that the spot size adjustment structure of the laser treatment handpiece of the existing laser treatment equipment is too complex and the process difficulty is high; during the clinical treatment process, the operation is cumbersome, and it is necessary to set the treatment parameters at both the handpiece end and the UI interface end, which is prone to misoperation.

[0008] To solve the above technical problems, this application provides a laser treatment handpiece, which includes a handpiece body, an incident lens assembly, and a moving lens assembly; the handpiece body has an optical path cavity and a motor cavity, the optical path cavity axially penetrates the handpiece body, and the motor cavity is arranged on one side of the optical path cavity; the incident lens assembly is placed at one end of the optical path cavity, and the incident lens assembly includes an incident lens barrel and a first lens placed in the incident lens barrel; the moving lens assembly includes a communication cable, a driving motor, a transmission component connected to the driving motor, and a second lens connected to the transmission component; wherein, the driving motor and the transmission component are placed in the motor cavity, the second lens is located in the optical path cavity and corresponds to the first lens, the driving motor is used to drive the transmission component to drive the second lens to move relative to the first lens, and the communication cable is used to realize the communication connection between the driving motor and the host, feedback the operating parameters of the driving motor to the host, and / or transmit the control parameters output by the host to the driving motor.

[0009] Optionally, the laser treatment handpiece further includes a distance measuring component disposed on the handpiece handle body. The distance measuring component is used to detect the distance between the handpiece handle body and the target working surface. The distance measuring component includes at least one conductive contact leg, and the contact leg is electrically connected to the communication cable.

[0010] Optionally, the laser treatment handpiece further includes an upper end cap assembly connected to the handpiece handle body. The upper end cap assembly includes an upper end cap and a control cable. The end of the control cable is fixed in the upper end cap and connected to a wiring terminal. The wiring terminal is located in a cable cavity above the motor cavity and is connected to the communication cable. The incident lens barrel is fixed to the upper end cap and cooperates with the upper end cap to seal the optical path cavity.

[0011] Optionally, the upper end cap has an upper end cap boss, and the handpiece handle body also has a stepped tooth. The control cable is pressed between the upper end cap boss and the stepped tooth.

[0012] Optionally, the laser treatment handpiece further includes a window lens assembly disposed in the handpiece handle body and sealing the other end of the optical path cavity. The window lens assembly includes a window lens barrel and a window lens disposed in the window lens barrel. The window lens faces the first lens and the second lens.

[0013] Optionally, the laser treatment handpiece further includes an electrode assembly and a lower end cap assembly. The electrode assembly includes a conductive contact head electrically connected to the communication cable and exposed from the handpiece handle body. The lower end cap assembly includes a lower end cap and a transfer conductive structure installed on the lower end cap. Wherein, the lower end cap is connected to the handpiece handle body, and the distance measuring component is connected to the lower end cap. The transfer conductive structure includes a conductive part in contact conduction with the conductive contact head and an elastic conductive part connected to the conductive part. The elastic conductive part is in contact conduction with the contact leg.

[0014] Optionally, the laser treatment handpiece further includes a window lens assembly disposed in the handpiece handle body and sealing the other end of the optical path cavity. The lower end cap further has a receiving cavity for receiving the elastic conductive part, a window lens cavity for receiving the window lens assembly and communicating with the optical path cavity, and a through hole penetrating the receiving cavity and the window lens cavity. The elastic conductive part includes a spring piece and a cylindrical contact head connected to the spring piece. The cylindrical contact head is located in the through hole. The distance measuring component includes a sleeve seat for installing the contact leg. The sleeve seat is provided with a slot for exposing a part of the contact leg. The sleeve seat is fixed in the window lens cavity, and the cylindrical contact head is clamped in the slot and contacts the contact leg.

[0015] Optionally, the window mirror assembly includes a window mirror barrel and a window mirror disposed within the window mirror barrel; the inner wall of the window mirror cavity has a first conical surface structure, and the outer wall of the window mirror barrel has a second conical surface structure. The window mirror barrel passes through the lower end cover so that the first conical surface structure and the second conical surface structure are matched and adhered to each other.

[0016] Optionally, the communication cable includes a motor cable and an electrode cable. The motor cable and the electrode cable are respectively connected to a terminal block, and the terminal block is disposed within a cable cavity above the motor cavity; the motor cable is connected to the drive motor, and the electrode cable is electrically connected to the contact foot.

[0017] Optionally, the transmission assembly includes a transmission bearing, a lead screw mechanism, and a lens bracket connected to the lead screw mechanism. The lead screw mechanism is connected to the drive motor and is rotationally supported in the transmission bearing, and the second lens is installed in the lens bracket; and / or, the drive motor is provided with an encoder.

[0018] To solve the above technical problems, the present application also provides a laser treatment device, including a main body and the laser treatment handpiece as described above; the main body includes a laser and a main control board, and the main control board is connected to the communication cable.

[0019] To solve the above technical problems, the present application also provides a control method for a laser treatment handpiece. The laser treatment handpiece includes: a first lens, a drive motor, and a second lens that is drivingly connected to the drive motor; the second lens faces the first lens and moves relative to the first lens under the drive of the drive motor; the control method includes: setting the spot parameters output by the laser treatment handpiece, where the spot parameters include the spot size; determining the current spot size output by the laser treatment handpiece; determining the displacement direction and the moving distance of the second lens according to the set spot size and the current spot size; and determining and outputting the control parameters of the drive motor according to the determined displacement direction and the moving distance.

[0020] To solve the above technical problems, the present application also provides a control method for a laser treatment device. The laser treatment device includes a main unit and the laser treatment handpiece described above. The main unit includes a laser and a main control board, and the main control board is communicatively connected to the laser and the laser treatment handpiece. The control method includes: setting the spot parameters output by the laser treatment handpiece, where the spot parameters include the spot size; determining the current spot size output by the laser treatment handpiece; determining the displacement direction and the moving distance of the second lens according to the set spot size and the current spot size; determining and outputting the control parameters of the drive motor according to the determined displacement direction and the moving distance; controlling the drive motor to operate according to the control parameters, and determining whether the second lens has moved to a preset position; detecting the current distance between the laser treatment handpiece and the target working surface, and determining whether the current distance is within a threshold range; when the second lens has moved to the preset position and the current distance is within the threshold range, controlling the laser to start.

[0021] Optionally, the current spot size is determined according to the current distance between the first lens and the second lens, or the current spot size is read from a data storage.

[0022] Optionally, the spot parameters are input through a human-machine interaction module, and / or the information of the laser treatment handpiece is output through the human-machine interaction module, where the information includes the position information of the second lens and / or the current spot size output by the laser treatment handpiece.

[0023] Optionally, an encoder is provided on the drive motor. Controlling the drive motor to operate and determining whether the second lens has moved to a preset position includes: counting the output pulses of the encoder; when the count of the output pulses of the encoder reaches the determined number of output pulses of the encoder, determining that the second lens has moved to the preset position; where the determined number of output pulses of the encoder is related to the determined moving distance of the second lens.

[0024] Optionally, detecting the current distance between the laser treatment handpiece and the target working surface and determining whether the current distance is within a threshold range includes: collecting the electrical parameters of the contact feet, where the contact feet are installed on the laser treatment handpiece; determining whether the current distance is within the threshold range according to whether the collected electrical parameters are within a preset range.

[0025] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0026] The lens of the lens group in the optical path cavity is moved by the setting method of the driving motor and the transmission component in the motor cavity, which can realize the automatic adjustment and position feedback of the lens position, with strong controllability, high intelligence and low risk of misoperation.

[0027] The upper end cover boss and the stepped tooth structure are used to realize the function of clamping the control cable. Without additional cable fixing buckles, the cable is firmly fixed and the structure is simplified.

[0028] The scheme of matching the conical surfaces of the rotating parts (the first conical surface structure and the second conical surface structure) can ensure the concentricity of the optical path with high precision.

[0029] The contact structure for electrode-type target working surface detection is realized by using the ranging component. The elastic sheet in the hollow tube is matched with the card slot of the ranging component to realize the dual functions of position positioning of the ranging component and electrode contact. The structure is simple, the elastic sheet is a common specification and is easy to realize. The contact foot of the ranging component has the dual functions of both a ranging head and an electrode, which simplifies the structure and reduces the parts.

[0030] The automatic adjustment of the light spot is realized through the parameter setting of the human-machine interaction module, rather than the dual setting adjustment of the handpiece end and the human-machine interaction end. This light spot size adjustment method reduces the risk of misoperation, and can realize the precise matching of the light spot size, pulse energy and energy density, simplifies the operation steps in the treatment process and improves the efficiency; the information of the handpiece end is output through the human-machine interaction module, reducing the risk of mismatch between the parameter setting of the human-machine interaction module and the setting of the handpiece end during the treatment process, and increasing the safety of the treatment process.

[0031] In summary, the technical solution of the present application has a simple and stable structure, is easy to operate and control, and has system reliability.

[0032] In addition, the technical solution of the present application reduces the volume of the laser treatment handpiece identification structure, gives more design space for the appearance shape of the handpiece, improves the aesthetics of the handpiece; at the same time, it also gives more structural design space for other functions of the handpiece, increasing the usability of the handpiece. Description of the Drawings

[0033] The following drawings detail the exemplary embodiments disclosed in the present application. The same reference numerals in the drawings denote similar structures in several views. Those of ordinary skill in the art will understand that these embodiments are non-limiting, exemplary embodiments, and the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of the present application. Embodiments in other ways may also achieve the inventive concept in the present application. It should be understood that the drawings are not drawn to scale. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. Unless obvious from the context or otherwise stated, the same reference numerals in the figures represent the same structure or operation. Among them:

[0034] Figures 1a to 1d It is a schematic diagram of the optical path principle for the optical lens group to achieve laser spot output;

[0035] Figure 2 It is a schematic diagram of the optical path principle for the optical lens group adopted by the laser treatment handpiece in the embodiment of the present application to achieve laser spot output;

[0036] Figure 3 It is an exploded structure diagram of the laser treatment handpiece in the embodiment of the present application;

[0037] Figure 4 It is a cross-sectional structure diagram of the laser treatment handpiece in the embodiment of the present application;

[0038] Figure 5 It is a cross-sectional structure diagram of the incident mirror assembly of the laser treatment handpiece in the embodiment of the present application;

[0039] Figure 6 It is a cross-sectional structure diagram of the moving mirror assembly of the laser treatment handpiece in the embodiment of the present application;

[0040] Figure 7 It is a cross-sectional structure diagram of the handpiece body of the laser treatment handpiece in the embodiment of the present application;

[0041] Figure 8a and Figure 8b It is a partial cross-sectional structure diagram of the combination of the incident mirror assembly, the upper end cover assembly and the handpiece body of the laser treatment handpiece in the embodiment of the present application;

[0042] Figure 9 It is a cross-sectional structure diagram of the window mirror assembly of the laser treatment handpiece in the embodiment of the present application;

[0043] Figure 10 It is a cross-sectional structure diagram of the electrode assembly of the laser treatment handpiece in the embodiment of the present application;

[0044] Figure 11aSchematic top view structure of the lower end cap assembly of the laser treatment handpiece according to an embodiment of the present application; Figure 11b is Figure 11a Schematic cross-sectional structure of the lower end cap assembly shown in the H-H direction;

[0045] Figure 12 Schematic three-dimensional structure of the distance measurement component of the laser treatment handpiece according to an embodiment of the present application;

[0046] Figure 13 Schematic structure of the contact between the sleeve seat slot of the distance measurement component of the laser treatment handpiece and the elastic piece cylindrical contact of the lower end cap assembly according to an embodiment of the present application;

[0047] Figure 14 Schematic structure of the laser treatment device according to an embodiment of the present application;

[0048] Figure 15 Schematic flowchart of the control method of the laser treatment handpiece according to an embodiment of the present application;

[0049] Figure 16 Schematic flowchart of the control method of the laser treatment device according to an embodiment of the present application;

[0050] Figure 17 System control block diagram for implementing the control method of the laser treatment device.

[0051] The following is a supplementary description of the reference numerals:

[0052] 1 - Incident mirror assembly; 2 - Upper end cap assembly; 3 - Handpiece handle body; 4 - Moving mirror assembly;

[0053] 5 - Electrode assembly; 6 - Lower end cap assembly; 7 - Window mirror assembly; 8 - Distance measurement component;

[0054] 101 - Incident mirror barrel; 101a - First thread structure; 102 - Plano-convex lens (first lens);

[0055] 201 - Upper end cap; 202 - Net tail sheath; 203 - Control cable; 204 - Cable connector;

[0056] 201a - Upper end cap boss;

[0057] 301a - Threaded connection; 301b - Step teeth; 301c - Upper thread structure; 301d - Lower thread structure;

[0058] 302a - Optical path cavity; 302b - Cable cavity; 302c - Motor cavity; 303 - Cable groove;

[0059] 401 - Terminal; 402 - Motor cable; 403 - Firming screw; 404 - Driving motor;

[0060] 405 - Set screw; 406 - Lens holder; 407 - Plano - concave mirror (second lens);

[0061] 408 - Lead screw mechanism; 409 - Transmission bearing; 410 - Motor bracket;

[0062] 501 - Fastening screw; 502 - Electrode insulation pressing piece; 503 - Spring pin; 504 - Electrode cable;

[0063] 503a - Conductive contact;

[0064] 601 - Spring pin contact piece; 601a - Downward extension rod structure; 602 - Lower end cover; 603 - Spring piece;

[0065] 602a - Accommodation cavity; 602b - Through - hole; 602c - Window mirror cavity;

[0066] 602d - First conical surface structure; 603a - Cylindrical contact;

[0067] 701 - Window mirror barrel; 702 - Window mirror (plane lens);

[0068] 701a - Second thread structure; 701b - Second conical surface structure;

[0069] 801 - Sleeve seat; 802 - First contact leg; 803 - Second contact leg;

[0070] 804 - Card slot; 805 - Set screw. Detailed implementation mode

[0071] The terms used in this application are only for the purpose of describing specific example embodiments and are not restrictive. For example, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" used herein may also include the plural forms. When used in this specification, the terms "include", "comprise" and / or "contain" mean that the associated integers, steps, operations, elements and / or components exist, but do not exclude the existence of one or more other features, integers, steps, operations, elements, components and / or groups, or the addition of other features, integers, steps, operations, elements, components and / or groups in the system / method. When describing the association of different components in this specification, it can be a direct relationship or an indirect relationship. For example, "A and B are connected" can be that A and B are directly connected, or A and B are indirectly connected through other components.

[0072] In view of the following description, the features disclosed in this specification, as well as the operations and functions of the relevant elements of the structure, and the economy of the combination and manufacture of components can be significantly improved. Referring to the accompanying drawings, all of which form a part of the disclosure of this specification. However, it should be clearly understood that the drawings are only for illustrative and descriptive purposes and are not intended to limit the scope of the disclosure of this specification. Flowcharts are used in this application to illustrate the operations performed by the system according to the embodiments of this application. It should be understood that the previous or subsequent operations do not necessarily need to be executed precisely in sequence. Instead, the steps can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or more steps can be removed from these processes.

[0073] The following description provides specific application scenarios and requirements of this application, aiming to enable those skilled in the art to manufacture and use the content of this application. For those skilled in the art, various local modifications to the disclosed embodiments are obvious, and without departing from the spirit and scope of this application, the general principles defined here can be applied to other embodiments and applications. Therefore, this application is not limited to the illustrated embodiments, but rather to the broadest scope consistent with the claims.

[0074] The technical solution of this application discloses a laser treatment handpiece for automatically adjusting the spot size and its control method, as well as a laser treatment device and its control method applying the laser treatment handpiece and its control method, for spot adjustment in clinical use. The solution of using a micro drive motor built into the laser treatment handpiece to move the lenses of the lens group (including the first lens and the second lens) has the advantages of simple structure, convenient use, and the drive motor can sensitively feedback the current position of the lens, thereby judging the current spot size and automatically configuring other laser parameters to output within a safe range, with the advantages of safety and reliability.

[0075] Please refer to Figure 3 , the technical solution of this application provides a laser treatment handpiece, which at least includes a handpiece body 3, an incident mirror assembly 1, and a moving mirror assembly 4.

[0076] Please refer to in combination Figure 4 and Figure 7 , the handpiece body 3 has an optical path cavity 302a and a motor cavity 302c, the optical path cavity 302a axially penetrates the handpiece body 3, and the motor cavity 302c is provided on one side of the optical path cavity 302a.

[0077] The incident mirror assembly 1 is placed at one end of the optical path cavity 302a, and the incident mirror assembly 1 includes an incident mirror barrel 101 and a first lens 102 placed inside the incident mirror barrel 101.

[0078] Please refer to in combination again Figure 6, the moving mirror assembly 4 includes a communication cable (which may include, for example, the motor cable 402 shown in the figure), a drive motor 404, a transmission assembly connected to the drive motor 404 (including, for example, the lead screw mechanism 408 shown in the figure), and a second lens 407 connected to the transmission assembly; wherein, the drive motor 404 and the transmission assembly are disposed in the motor cavity 302c, the second lens 407 is located in the optical path cavity 302a and corresponds to the first lens 102, the drive motor 404 is used to drive the transmission assembly to drive the second lens 407 to move relative to the first lens 102, and the communication cable is used to realize the communication connection between the drive motor and the host, feedback the operating parameters of the drive motor 404 to the host, and / or transmit the control parameters output by the host to the drive motor 404.

[0079] The transmission assembly can be any mechanism that realizes the conversion of the rotational motion of the drive motor into a linear motion, which will not be elaborated here. In this embodiment, taking the transmission assembly including the lead screw mechanism 408 shown in the figure as an example, the transmission assembly includes a transmission bearing 409, a lead screw mechanism 408, and a lens bracket 406 connected to the lead screw mechanism 408. The lead screw mechanism 408 is connected to the drive motor 404 and is rotatably supported in the transmission bearing 409, and the second lens 407 is installed in the lens bracket 406. The drive motor 404 may also be provided with an encoder (not shown) for outputting the operating parameters of the drive motor 404.

[0080] The host can judge whether the second lens 407 has moved to a preset position based on the operating parameters fed back by the drive motor 404, so as to control the output of the laser. Further, please refer to Figure 3 and Figure 4 , the laser treatment handpiece may further include a distance measuring component 8 provided on the handpiece body 3. The distance measuring component 8 is used to detect the distance between the handpiece body 3 and the target working surface (such as the skin surface). The distance measuring component 8 includes at least one conductive contact foot 803, and the contact foot 803 is electrically connected to the communication cable (such as an electrode cable). The electrical parameters are transmitted to the host through the contact foot 803 and the communication cable for the host to judge whether the current distance between the handpiece body 3 and the target working surface is within the threshold range, and the output of the laser can be controlled in combination with whether the second lens 407 has moved to the preset position.

[0081] Please continue to refer to Figure 3 , Figure 4 and Figure 7The laser treatment handpiece may further include an upper end cover assembly 2 connected to the handpiece handle 3, the upper end cover assembly 2 includes an upper end cover 201 and a control cable 203; the end of the control cable 203 is fixed in the upper end cover 201 and connected to the terminal 401, the terminal 401 is placed in the cable cavity 302b above the motor cavity 302c and connected to the communication cable (which may include, for example, a motor cable and / or an electrode cable); the incident lens barrel 101 is fixed to the upper end cover 201, and cooperates with the upper end cover 201 to seal the optical path cavity 302a. The function of the upper end cover assembly 2 is to protect the first lens 102 and seal the upper part of the laser treatment handpiece.

[0082] Further, please combine Figure 8a and Figure 8b The upper end cover 201 has an upper end cover boss 201a, and the hand tool handle body 3 also has a stepped tooth 301b, and the control cable 203 is pressed between the upper end cover boss 201a and the stepped tooth 301b.

[0083] Please refer to Figure 3 , Figure 4 and Figure 9 The laser treatment handpiece may further include a window mirror assembly 7 placed in the handpiece handle 3 and sealing the other end of the optical path cavity 302a. The window mirror assembly 7 includes a window lens barrel 701 and a window mirror 702 placed in the window lens barrel 701, and the window mirror 702 is directly facing the first lens 102 and the second lens 407. The main function of the window mirror assembly 7 is to prevent dust and prevent particles such as dust from entering the laser treatment handpiece and contaminating the lens.

[0084] The laser therapy handpiece may further include an electrode assembly and a lower end cover assembly. One way to achieve electrical conduction between the contact leg 803 of the ranging assembly 8 and the communication cable may be to combine the structure of the electrode assembly 5 and the lower end cover assembly 6.

[0085] Specifically, please refer to Figure 4 and Figure 10 The electrode assembly 5 includes a conductive contact 503a electrically connected to the communication cable (including, for example, the electrode cable 504 shown in the figure) and exposed from the hand tool handle 3; please refer to Figure 11a and Figure 11b The lower end cover assembly 6 includes a lower end cover 602 and a transition conductive structure installed on the lower end cover 602.

[0086] The lower end cover 602 is connected to the handpiece handle body 3, and the distance measuring component 8 is connected to the lower end cover 602; the transfer conductive structure includes a conductive part (for example, a spring needle contact piece 601 with a downward extension rod structure 601a shown in the figure) that is in contact conduction with the conductive contact 503a, and an elastic conductive part (for example, a spring piece 603 connected with a cylindrical contact 603a shown in the figure) connected to the conductive part, and the elastic conductive part is in contact conduction with the contact support feet 803.

[0087] Furthermore, the lower end cover 602 further has a receiving cavity 602a for receiving the elastic conductive part, a window lens cavity 602c for receiving the window lens assembly 7 and communicating with the optical path cavity 302a, and a through hole 602b that penetrates the receiving cavity 602a and the window lens cavity 602c; the elastic conductive part includes a spring piece 603 and a cylindrical contact 603a connected to the spring piece 603, and the cylindrical contact 603a is located in the through hole 602b.

[0088] Please also refer to Figure 12 , the distance measuring component 8 includes a sleeve base 801 for installing the contact support feet 802 and 803, a card slot 804 for exposing the contact support feet 802 and 803 is provided on the sleeve base 801, the sleeve base 801 is fixed in the window lens cavity 602c, and the cylindrical contact 603a is stuck in the card slot 804 and contacts the contact support feet 802 and 803, as Figure 13 shown.

[0089] Please refer to Figure 9 and Figure 11b , the inner wall of the window lens cavity 602c has a first conical surface structure 602d, the outer wall of the window lens barrel 701 has a second conical surface structure 701b, and the window lens barrel 701 passes through the lower end cover 602 so that the first conical surface structure 602d and the second conical surface structure 701b are matched and attached. The scheme of the conical surface of the rotary part cooperating with the conical surface can ensure the concentricity of the optical path with high precision.

[0090] Next, taking the drive motor as a reduction motor, the first lens as a plano-convex lens, and the second lens as a plano-convex lens as examples, the technical solution of the present application will be further described in detail with reference to the accompanying drawings and embodiments. Among them, the reduction motor can be a stepping motor, a servo motor, a brushed motor or a brushless motor, etc., and the stepping motor is adopted in the embodiments of the present application. The combination of the first lens and the second lens is not limited to the combination of a plano-convex lens and a plano-concave lens. In practical applications, according to the actual spot output requirements, several lens combinations shown in Figures 1a to 1d can also be adopted.

[0091] Please first refer to Figure 2, the plano-convex mirror 102 is fixedly installed, and its main function is to focus the light beam, converting the parallel light beam into a light beam with a certain convergence angle; the main function of the plano-concave mirror 407 is to collimate the light beam, making the light beam become a collimated light beam close to parallel. Optionally, the main function of the window mirror 702 (plane lens) is to seal and prevent dust, avoiding the internal lens of the handpiece from being contaminated by the soot generated after the tissue at the treatment surface is vaporized by the laser. The diameter of the laser beam is achieved by moving the plano-concave mirror 407 to different positions. For example, Figure 2 when the lens in

[0092] is moved from position 1 to position 2, at this time, the diameter of the light spot received by the incident surface of the plano-concave mirror 407 becomes smaller, and the diameter of the collimated light beam output after being collimated by the plano-concave mirror 407 correspondingly becomes smaller. Figure 3 Please refer to

[0093] The function of the incident mirror assembly 1 is to converge the laser beam at a certain angle. Please refer to Figure 4 and Figure 5 , the incident mirror assembly 1 includes an incident mirror barrel 101 and a first lens 102 placed inside the incident mirror barrel 101.

[0094] The collimated light beam incident into the laser treatment handpiece is converged into a light beam with a certain convergence angle by the first lens 102. The incident mirror barrel 101 and the first lens 102 can be fixedly connected by, for example, glue bonding.

[0095] Please refer to Figure 4 and Figure 6 , the moving mirror assembly 4 includes a motor cable 402, a driving motor 404 connected to the motor cable 402, a transmission assembly connected to the driving motor 404, and a second lens 407 connected to the transmission assembly. In this embodiment, the transmission assembly includes a transmission bearing 409, a lead screw mechanism 408, and a lens bracket 406 installed on the lead screw mechanism 408, and the second lens 407 is placed inside the lens bracket 406. The second lens 407 faces the first lens 102. The driving motor 404 is used to drive the lead screw mechanism 408 to rotate to drive the second lens 407 in the lens bracket 406 to move relative to the first lens 102. The motor cable 402 is used to feedback the operating parameters of the driving motor 404 to the host computer, and is also used to transmit the control parameters output by the host computer to the driving motor 404. The lead screw mechanism 408 is connected to the driving motor 404 and is rotatably supported in the transmission bearing 409, and the transmission bearing 409 can be a micro bearing.

[0096] The lens bracket 406 and the second lens 407 can be fixedly connected by means such as glue bonding. The lead screw mechanism 408 can be a threaded lead screw, and the lens bracket 406 and the second lens 407 are installed on the lead screw mechanism 408 by means of threaded connection. The lead screw mechanism 408 can also be other applicable structures such as a T-slot lead screw, and the lens bracket 406 and the second lens 407 are installed in a manner adapted to the lead screw mechanism 408. By driving the lead screw mechanism 408 through the drive motor 404, the lens bracket 406 and the second lens 407 can be driven to move up and down, that is, move upward close to the incident lens barrel 101 and the first lens 102, or move downward away from the incident lens barrel 101 and the first lens 102.

[0097] In this embodiment, the moving mirror assembly 4 may further include a motor bracket 410 for carrying the drive motor 404. The lead screw mechanism 408 and the motor bracket 410 are connected by the transmission bearing 409, whereby the drive motor 404 and the lead screw mechanism 408 can move more stably.

[0098] In addition, the drive motor 404 and the lead screw mechanism 408, and the drive motor 404 and the motor bracket 410 can be fixedly connected by appropriate means. For example, the moving mirror assembly 4 may further include set screws 403 and lock screws 405. The drive motor 404 and the motor bracket 410 are connected by the set screws 403, and the drive motor 404 and the lead screw mechanism 408 are connected by the lock screws 405.

[0099] Please refer to Figure 3 and Figure 4 , the moving mirror assembly 4 is installed in the handpiece handle body 3, and the upper end cap assembly 2 is installed on the handpiece handle body 3. The upper end cap assembly 2 and the handpiece handle body 3 can protect the incident mirror assembly 1 and the moving mirror assembly 4.

[0100] The upper end cap assembly 2 includes an upper end cap 201, a control cable 203, and a cable connector 204 connecting the control cable 203; the incident lens barrel 101 is sleeved into the upper end cap 201 so that the first lens 102 is placed inside the upper end cap 201.

[0101] The function of the upper end cap assembly 2 is to seal the upper part of the laser treatment handpiece. The control cable 203 can be plugged into the male and female aviation plugs of the connector of the host through the cable connector 204 to achieve signal transmission. The upper end cap assembly 2 may further include a cable grommet 202, and the cable grommet 202 covers a part of the control cable 203 exposed from the upper end cap 201, such as Figure 4As shown, the control cable 203 passes through the upper end cap 201. The part of the control cable 203 exposed outside the upper end cap 201 is prone to breakage, and the cable grommet 202 can be used to wrap it for protection.

[0102] Please refer to Figure 4 and Figure 7 , the handpiece body 3 has an optical path cavity 302a, a cable cavity 302b, and a motor cavity 302c; the optical path cavity 302a axially penetrates the handpiece body 3, the motor cavity 302c is disposed on one side of the optical path cavity 302a, and the cable cavity 302b is disposed above the motor cavity 302c. The incident mirror assembly 1 is placed at one end of the optical path cavity 302a. The optical path cavity 302a provides a moving space for the second lens 407, the cable cavity 302b provides a placement space for the motor cable 402, and the motor cavity 302c provides a placement space for the drive motor 404 and the lead screw mechanism 408.

[0103] The moving mirror assembly 4 further includes a terminal 401 for connecting the motor cable 402. The control cable 203 passes through the upper end cap 201, and its end is fixed in the upper end cap 201 and connected to the terminal 401. The terminal 401 is placed in the cable cavity 302b above the motor cavity 302c and connected to the motor cable 402.

[0104] The handpiece body 3 can carry other components of the handpiece and play a role in support and protection. The second lens 407 and the lens bracket 406 are placed in the optical path cavity 302a, and the optical path cavity 302a is a moving space for the second lens 407 and the lens bracket 406. The drive motor 404 and the lead screw mechanism 408 are placed in the motor cavity 302c, and the motor cavity 302c is a rotating space for the drive motor 404 and the lead screw 408. The cable cavity 302b is a placement space for the mating cable connector, that is, the terminal 401 and the end of the control cable 203.

[0105] The laser treatment handpiece of this embodiment further includes a cable pressing structure for stabilizing the control cable 203. Please refer to Figure 7 and Figure 8b , the upper end cap 201 has an upper end cap boss 201a, and the handpiece body 3 also has a stepped tooth 301b. The control cable 203 is pressed by the upper end cap boss 201a and the stepped tooth 301b, so that the end of the control cable 203 is fixed in the upper end cap 201.

[0106] The connection structure of the incident mirror assembly 1, the upper end cap assembly 2, and the handpiece body 3 of this embodiment can be referred to Figure 5 , Figure 7and Figure 8a is used to seal one end of the optical path cavity 302a. Specifically, the outer wall of the incident lens barrel 101 has a first thread structure 101a, and the inner wall of the handpiece body 3 (the upper part of the inner wall of the optical path cavity 302a) has an upper thread structure 301c; the incident lens barrel 101 passes through the upper end cap 201, and the upper end cap 201 and the handpiece body 3 are tightly connected by a threaded connection 301a of the first thread structure 101a and the upper thread structure 301c. Those skilled in the art can understand that the sealing structure is not limited to the threaded connection structure described in this embodiment, and other connection structures that can be tightly fitted with each other can also be used to achieve it.

[0107] Please continue to refer to Figure 3 and Figure 4 and Figure 9 In this embodiment, the window lens assembly 7 is placed in the handpiece body 3 and seals the other end of the optical path cavity 302a. The window lens assembly 7 includes a window lens barrel 701 and a window lens 702 placed in the window lens barrel 701, and the window lens 702 faces the first lens 102 and the second lens 407.

[0108] The main function of the window lens assembly 7 is to prevent dust, and avoid external dust and other particulate matters from entering the laser treatment handpiece and contaminating the lens. The window lens barrel 701 and the window lens 702 can be fixedly connected by means such as glue bonding.

[0109] Please refer to Figure 4 and Figure 10 In this embodiment, the electrode assembly 5 is used for the connection of the contact feet, and includes a conductive contact 503a that is electrically connected to the electrode cable 504 and exposed from the handpiece body 3. In this embodiment, the electrode assembly 5 includes an electrode insulating pressing piece 502, a spring needle 503 placed in the electrode insulating pressing piece 502, and an electrode cable 504 connecting the spring needle 503; referring to Figure 7 again, the handpiece body 3 also has a wire groove 303, the electrode cable 504 passes through the wire groove 303 to be connected to the terminal 401, and the spring needle 503 has a conductive contact 503a exposed from the electrode insulating pressing piece 502. The material of the spring needle 503 is a metal conductive material, for example, it can be a copper spring needle.

[0110] The electrode assembly 5 also includes a fastening screw 501, and the fastening screw 501 fastens the electrode insulating pressing piece 502 to the motor bracket 410. On the one hand, the moving mirror assembly 4 can be fixed in the handpiece body 3, and on the other hand, the electrode, that is, the conductive contact 503a, can be fixed on the handpiece body 3.

[0111] Please refer to Figure 4 and Figure 11aand Figure 11b , the lower end cover assembly 6 is used to protect the window mirror assembly 7. The lower end cover 602 is connected to the handpiece body 3, and the distance measuring assembly 8 is connected to the lower end cover 602.

[0112] The lower end cover assembly 6 includes a lower end cover 602 and a transfer conductive structure installed on the lower end cover 602. In this embodiment, the transfer conductive structure includes a conductive part in contact conduction with the conductive contact 503a and an elastic conductive part connected to the conductive part. Specifically, in cooperation with the structure of the lower end cover 602 for actual application, the conductive part may be a spring needle contact piece 601 with a downward extension rod structure 601a as shown in the figure, and the elastic conductive part may be a spring piece 603 connected with a cylindrical contact 603a as shown in the figure. The elastic conductive part is in contact conduction with the contact leg 803.

[0113] The spring needle contact piece 601 is arranged on the lower end cover 602 to contact the conductive contact 503a. The lower end cover 602 has a receiving cavity 602a, a through hole 602b, and a window mirror cavity 602c. The through hole 602b penetrates the receiving cavity 602a and the window mirror cavity 602c. The spring piece 603 is placed in the receiving cavity 602a. The spring piece 603 is connected with a cylindrical contact 603a. The cylindrical contact 603a is placed in the through hole 602b and can move telescopically. The spring needle contact piece 601 has a downward extension rod structure 601a extending into the receiving cavity 602a to contact the spring piece 603. The window mirror barrel 701 is sleeved on the lower end cover 602 so that the window mirror 702 is placed in the window mirror cavity 602c. The downward extension rod structure 601a of the spring needle contact piece 601 extends into the receiving cavity 602a, ensuring its real-time contact conduction with the spring piece 603.

[0114] The spring piece 603 of this embodiment is a V-shaped spring piece, and the receiving cavity 602a is a V-shaped hollow tube. In other embodiments, it may also be an L-shaped or other shaped structures. The material of the spring needle contact piece 601 is a metal conductive material, and its function is to contact and conduct with the conductive contact 503a in the electrode assembly 5. The spring needle contact piece 601 has a downward extension rod structure 601a, and this structure extends downward into the receiving cavity 602a to maintain contact conduction with the spring piece 603. The cylindrical contact of the spring piece 603 can move in the through hole 602.

[0115] The connection structure of the window mirror assembly 7, the lower end cover assembly 6, and the handpiece body 3 in this embodiment can be combined with reference to Figure 4 、 Figure 7 and Figure 9, used to seal the other end of the optical path cavity 302a. The outer wall of the window barrel 701 has a second thread structure 701a, and the inner wall of the hand tool handle 301 (the lower part of the inner wall of the optical path cavity 302a) has a lower thread structure 301d; the window barrel 701 passes through the lower end cover 602, and the lower end cover 602 is connected and fastened to the hand tool handle 3 through the threaded connection of the second thread structure 701a and the lower thread structure 301d. Those skilled in the art can understand that the sealing structure is not limited to the threaded connection structure described in this embodiment, and can also be implemented by other connection structures that can be fastened to each other.

[0116] Further, please refer to Figure 9 and Figure 11b The inner wall of the window mirror cavity 602c has a first conical surface structure 602d, and the outer wall of the window lens barrel 701 has a second conical surface structure 701b. The window lens barrel 701 passes through the lower end cover 602 so that the first conical surface structure 602d and the second conical surface structure 701b are matched and fitted. The second conical surface structure 701b cooperates with the first conical surface structure 602d to ensure that the window lens barrel 701 is concentric with the window mirror cavity 602c.

[0117] Please refer to Figure 4 and Figure 12 The distance measuring assembly 8 described in this embodiment includes a sleeve seat 801, a first contact leg 802 and a second contact leg 803 installed on the sleeve seat 801. The sleeve seat 801 is provided with a slot 804 for exposing the first contact leg 802 and the second contact leg 803. Figure 13 The sleeve seat 801 is inserted into the window mirror cavity 602 c so that the cylindrical contact 603 a connected to the spring 603 is clamped in the clamping groove 804 .

[0118] The slot 804 is used for the distance measuring component 8 to be quickly inserted into the hand tool for installation. Corresponding to the V-shaped structure of the spring piece 603, the slot 804 of this embodiment is a V-shaped slot. The material of the first contact leg 802 and the second contact leg 803 is a metal conductive material. In addition, the distance measuring component also includes a set screw 805, through which the first contact leg 802, the second contact leg 803 and the sleeve seat 801 are fastened and connected.

[0119] The first contact leg 802 and the second contact leg 803 are conductively connected to the control cable 203 through the transfer conductive structure, the conductive contact 503a, the electrode cable 504, and the terminal 401, so that the host can collect the electrical signals on the contact legs and obtain electrical parameters.

[0120] It should be noted that the motor cable 402 and the electrode cable 504 in this embodiment are respectively connected to the terminal 401. The motor cable 402 is connected to the drive motor 404, and the electrode cable 504 is electrically connected to the contact feet 802 and 803. Both the motor cable 402 and the electrode cable 504 are used to achieve communication connection with the host. In practical applications, communication cables can be used as the motor cable 402 and the electrode cable 504, and one or more paths of the communication cable can be used as the motor cable 402 and / or the electrode cable 504.

[0121] Please refer to Figure 14 , based on the above laser treatment handpiece, the laser treatment device of the embodiment of the present application includes a host and a laser treatment handpiece; the host includes a laser and a main control board, and the main control board is connected to the communication cable. The main control board can be used to transmit operating parameters, control parameters, electrical parameters of the contact feet, etc. of the drive motor to the laser treatment handpiece.

[0122] The laser treatment handpiece is used to shape the output laser spot and adjust the spot output mode in cooperation with the embedded control program, etc., so as to achieve the treatment of different indications. The laser treatment handpiece can include optical lenses, lens movement control components, mechanical structures, skin contact detection modules, control cables, etc., and its specific structure can be as described in the above embodiment. The control cable is used for transmitting the control signal of the handpiece deceleration motor and the skin contact detection signal; its tail end has a connector for plugging and connecting the control cable at the handpiece end and the control cable at the system end.

[0123] The host includes an embedded control system and a laser. The embedded control system specifically includes a main control board and embedded software, etc., and is used to realize the control and monitoring of the whole machine system. The laser, that is, the laser generator, is used to generate laser. The laser treatment device further includes a light guide arm connecting the laser and the laser treatment handpiece, and the light guide arm is used for laser energy transmission.

[0124] The host may specifically further include a laser power supply, a refrigeration system, a human-computer interaction module, an alarm prompt module, etc. respectively connected to the main control board. The laser power supply is a drive power supply for the laser, and is used to provide high-voltage pulses to the laser. The refrigeration system is used to cool the laser, and through water circulation, it takes away the excess heat of the laser. The human-computer interaction module is used to set treatment parameters, treatment modes, energy densities, etc. The alarm prompt module is used for the status detection of each subsystem, including laser pulse energy, laser cavity temperature, water temperature, handpiece skin contact detection, handpiece connection in place recognition, water flow detection, water level detection, foot switch connection in place detection, remote control interlock switch connection in place monitoring, baffle interlock switch in place detection, etc.

[0125] The present application also provides a control method for a laser therapy handpiece, the laser therapy handpiece comprising: a first lens, a drive motor, and a second lens connected to the drive motor; the second lens faces the first lens and moves relative to the first lens under the drive motor. The application structure of the laser therapy handpiece can refer to the above embodiment, but is not limited to the structure of the above embodiment.

[0126] Please refer to Figure 15 The control method includes: step S1, setting the spot parameters of the laser therapy handpiece output, the spot parameters including the spot size; step S2, determining the current spot size of the laser therapy handpiece output; step S3, determining the displacement direction and moving distance of the second lens according to the set spot size and the current spot size; step S4, determining and outputting the control parameters of the drive motor according to the determined displacement direction and the moving distance.

[0127] In specific implementation, in step S1, the spot parameters can be input (set) through the human-computer interaction module of the laser treatment device, such as the UI interface, and the spot parameters can specifically include spot size, laser energy density, and laser pulse frequency. The laser spot size (such as spot diameter), laser energy density, and laser pulse frequency that the handpiece needs to output can be input in the UI interface, wherein the set spot size is used to control the movement of the second lens in the laser treatment handpiece to achieve automatic adjustment of the spot size, and the set laser energy density and laser pulse frequency are used to control the laser pulse frequency and energy output of the laser.

[0128] In addition, the information of the laser therapy handpiece can also be output (displayed) through a human-computer interaction module such as a UI interface. The information may include the position information of the second lens and / or the current spot size output by the laser therapy handpiece. The position information of the second lens may be the current position of the second lens, the moving distance of the second lens, the distance between the second lens and the first lens, etc.

[0129] In step S2, the current spot size can be determined according to the current distance between the two lenses. Specifically, according to the first lens and the second lens selected in the actual application, the focal points of the first lens and the second lens are known, and the current spot size can be determined according to the current position of the second lens or the current distance between the first lens and the second lens. In actual application, the current distance between the first lens and the second lens can be the initial distance between the first lens and the second lens, or can be the distance obtained after the second lens was moved last time, and the distance data can be stored in a data storage device. The data storage device can also store the initial spot size data and the spot size data after the second lens was moved last time at the same time, that is, the current spot size can be directly read from the data storage device.

[0130] In step S3, according to the actually selected first lens and second lens and their position structures, there is a corresponding relationship between the spot size and the position of the second lens. The moving distance of the second lens can be determined according to the corresponding relationship and the difference between the current spot size and the set spot size. Additionally, according to the current spot size and the set spot size, it can be determined whether magnification adjustment or reduction adjustment is required. Referring to Figure 2 , if magnification adjustment is required, the displacement direction of the second lens is towards the first lens, and if reduction adjustment is required, the displacement direction of the second lens is away from the first lens.

[0131] In step S4, according to the determined displacement direction and moving distance, the control parameters of the drive motor are determined and output. In this embodiment, taking the transmission assembly including a lead screw mechanism and the drive motor being integrated with an encoder as an example, the encoder is installed on the lead screw mechanism and rotates coaxially with the lead screw mechanism. The encoder converts the angular displacement into an electrical signal and outputs a pulse signal for each unit angle it rotates. The control parameters of the drive motor can include the enable signal for controlling the operation of the drive motor, the rotation direction of the lead screw mechanism, the output pulse number of the encoder, etc.

[0132] Specifically, the rotation direction of the lead screw mechanism can be determined according to the determined displacement direction of the second lens. There is a corresponding relationship between the displacement direction of the second lens and the rotation direction of the lead screw mechanism, which is related to the installation structure of the drive motor, the lead screw mechanism, and the second lens during actual application. For example, when the lead screw mechanism rotates forward (clockwise), the displacement direction of the second lens is away from the first lens, and when the lead screw mechanism rotates backward (counterclockwise), the displacement direction of the second lens is towards the first lens.

[0133] The output pulse number of the encoder can be determined according to the determined moving distance of the second lens. The determined output pulse number of the encoder is related to the determined moving distance of the second lens. For example, there is a corresponding relationship or conversion relationship between the moving distance of the second lens and the output pulse number of the encoder, which is related to the installation structure of the encoder of the drive motor, the lead screw mechanism, and the second lens during actual application. For example, cntValue = USART1_RX_BUF[5] * 288, where cntValue represents the output pulse number of the encoder, and USART1_RX_BUF[5] is used to represent the moving distance of the second lens.

[0134] After determining the rotation direction of the lead screw mechanism and the number of output pulses of the encoder, the driving motor can be controlled according to the determined rotation direction of the lead screw and the number of output pulses of the encoder. The driving motor is integrated with a control chip, and the main control board of the host is integrated with a microcontroller (MCU). When the spot size needs to be adjusted, the microcontroller of the main control board sends an enable signal to the control chip. After receiving the enable signal, the control chip controls the driving motor to start working. The driving motor outputs driving pulses according to the determined rotation direction of the lead screw mechanism to control the forward or reverse rotation of the lead screw mechanism, and at the same time drives the encoder on the lead screw mechanism to rotate. The encoder outputs a pulse signal for each unit angle of rotation, and thus the movement of the second lens to a preset position can be determined by counting the output pulses of the encoder.

[0135] An embodiment of the present application further provides a control method for a laser treatment device. The laser treatment device includes a host and the laser treatment handpiece described in the above embodiment. The host includes a laser and a main control board, and the main control board is communicatively connected to the laser and the laser treatment handpiece. Please refer to Figure 16 , the control method includes: Step S1, setting the spot parameters output by the laser treatment handpiece, where the spot parameters include the spot size; Step S2, determining the current spot size output by the laser treatment handpiece; Step S3, determining the displacement direction and the moving distance of the second lens according to the set spot size and the current spot size; Step S4, determining and outputting the control parameters of the driving motor according to the determined displacement direction and the moving distance; Step S5, controlling the driving motor to operate according to the control parameters, and determining whether the second lens has moved to a preset position; Step S6, detecting the current distance between the laser treatment handpiece and the target working surface, and determining whether the current distance is within a threshold range; Step S7, when the second lens moves to the preset position and the current distance is within the threshold range, controlling the laser to start.

[0136] The specific implementation of Steps S1 to S4 can refer to the specific implementation of each step of the control method of the above laser treatment handpiece.

[0137] In Step S5, determining whether the second lens has moved to a preset position may include: counting the output pulses of the encoder; when the count of the output pulses of the encoder reaches the determined number of output pulses of the encoder, determining that the second lens has moved to the preset position.

[0138] Specifically, there is a corresponding relationship between the rotation angle of the lead screw mechanism and the number of output pulses of the encoder, which is related to the selection of the driving motor and the installation structure of the encoder of the driving motor and the lead screw. In actual application, the driving motor outputs driving pulses to drive the rotation of the lead screw mechanism, and the rotation of the lead screw mechanism drives the rotation of the encoder fixed on its shaft. For example, when the lead screw mechanism and the encoder rotate 360°, the encoder outputs 1440 pulses. It is judged whether the current output pulse count of the encoder has reached the number of output pulses of the encoder determined in step S4. If not, the driving motor continues to output driving pulses. If so, it means that the rotation angle of the lead screw mechanism matches the distance that the second lens needs to move, that is, the second lens moves to the accurate position, namely the preset position.

[0139] In step S6, the detecting the current distance between the laser treatment handpiece and the target working surface and judging whether the current distance is within the threshold range may include: collecting the electrical parameters of the contact foot, and the contact foot is installed on the laser treatment handpiece; judging whether the current distance is within the threshold range according to whether the collected electrical parameters are within the preset range.

[0140] Specifically, the main control board of the host collects the electrical parameters of the contact foot through a control cable. For example, in the above embodiment of the laser treatment handpiece, the first contact foot 802 and the second contact foot 803 are conductively connected through the elastic piece 603 connecting the cylindrical contact head 603a, the downward extension rod structure 601a of the spring needle contact piece 601, the conductive contact head 503a connected by the spring needle 503, the electrode cable 504, and the terminal 401 to the control cable 203, so that the host can collect the electrical signals on the contact foot and obtain the electrical parameters. The electrical signals on the contact foot are processed by functions such as conduction current amplification and filtering, and then collected and converted by the ADC (analog-to-digital conversion) module of the microcontroller. The electrical parameters can be voltage values or current values, and can also be converted into resistance values. When the contact foot is in contact with the target working surface to form conduction, the electrical parameters will change, and the electrical parameters are related to the characteristics of the target working surface. The preset range and the threshold range are preset according to the characteristics of the target working surface adopted, can be obtained through experimental tests in actual applications, and are stored in the data memory in advance. When the collected electrical parameters are within the preset range, the current distance between the laser treatment handpiece and the target working surface is within the threshold range, indicating that the laser treatment handpiece is in contact with or close to the target working surface.

[0141] In step S7, when the second lens moves to the preset position and the current distance is within the threshold range, the laser is controlled to start.

[0142] Specifically, in combination with step S5 and step S6, controlling the laser output of the laser requires meeting two conditions: one condition is that when the output pulse count of the encoder reaches the determined output pulse number of the encoder; the other condition is that when the electrical parameters of the contact pin collected are within a preset range. That is to say, when the second lens moves to a preset position and the current distance between the contact pin and the target working surface is within the threshold range, the laser treatment handpiece can send a feedback signal to the main control board of the host. After receiving the feedback signal, the main control board controls the laser to turn on, outputs laser to the laser treatment handpiece, and controls the laser treatment handpiece to output laser, and the size of the output laser spot conforms to the spot size set in step S1.

[0143] Further, when the second lens moves to a preset position and the current distance is within the threshold range, the driving motor can also be controlled to stop. For example, the main control board of the host sends a disabling signal to the driving motor to control the driving motor to stop outputting driving pulses.

[0144] The control method of the laser treatment handpiece and the laser treatment device in the embodiment of the present application can receive the required spot size, that is, the spot size, through the UI interface, and obtain the corresponding numerical parameters through the logical algorithm of the software, so as to achieve high-precision automatic adjustment of the position. The following is combined with Figure 17 to illustrate an application example of this control scheme.

[0145] The microcontroller U11 is the deployment system of the host. The enabling signal iEN, the forward and reverse direction signal iDIR (the rotation direction signal of the lead screw), the software reset signal iREST, and the pulse sending signal iSTEP (the driving pulse for controlling the driving motor) output by it control the control chip U8 of the driving motor through the voltage isolation module U9, so as to control the stepping motor to start rotating according to the control parameters through the control terminal P10. The voltage isolation module U9 has the effects of voltage conversion and isolation, and converts the voltage of the signal output by the microcontroller U11 into a voltage that can match the stepping motor; the voltage isolation module U9 can adopt an optocoupler, a relay, a voltage isolator, etc. The data memory U24 is used for the microcontroller U11 to call parameter data and store and process data, etc. The enabling signal EN, the forward and reverse direction signal DIR (the rotation direction signal of the lead screw mechanism), the software reset signal REST, and the pulse sending signal STEP after voltage conversion by the voltage isolation module U9 are processed by the control chip U8 and control the stepping motor to work through the wiring terminal P10 of the stepping motor. The lead screw mechanism is the central bearing of the stepping motor, and the spot moving device (such as the lens bracket and the second lens) is installed on the lead screw mechanism, so that the linear movement of the spot moving device fixed on the lead screw is realized by driving the rotation of the lead screw mechanism through the rotation of the motor.

[0146] First, input the calibrated spot size through the UI interface. This spot size can be transmitted via serial communication. The encoder is fixed on the rotating central bearing. According to the spot size, the moving distance of the corresponding second lens can be obtained. For example:

[0147] USART1_RX_BUF[5] = 0x05 indicates that the moving distance of the second lens corresponding to the spot size is 5 mm;

[0148] USART1_RX_BUF[5] = 0x10 indicates that the moving distance of the second lens corresponding to the spot size is 16 mm;

[0149] USART1_RX_BUF[5] = 0x80 indicates that the moving distance of the second lens corresponding to the spot size is 128 mm;

[0150] cntValue = USART1_RX_BUF[5] * 288;

[0151] Correspondingly, the output pulse count cntValue of the encoder is 1440, 4608, 36864.

[0152] hValue = TIM_GetCounter(ENCODER_TIM4); / / Calculate the encoding distance count to be run (count the output pulses of the encoder), which is a variable.

[0153] The receiving terminal P12 establishes the relationship between the +5V, GND required by the linear encoder and the control system power supply. Signals A and B are the two output phases of the encoder. Once the motor operates, it continuously outputs digital signals of high and low levels. Signal I is the automatically calibrated zero position, indicating that a high level will be output every 360° of rotation. The power conversion module U10 converts the +5V voltage into 3.3V voltage, thereby establishing the adaptation relationship between the encoder and the microcontroller U11 of the main control board. The signals iA, iB, and iI after voltage conversion by the power conversion module U10 are transmitted to the microcontroller U11, and the microcontroller U11 counts the output pulses of the encoder.

[0154] The rotation of the motor drives the rotation of the lead screw mechanism. The rotation of the lead screw mechanism drives the encoder disk fixed on its shaft to rotate. For example, 1440 pulses are output when rotating 360°, thus outputting the corresponding number of pulses. The rotation of the lead screw mechanism also causes the spot moving device fixed on its shaft to achieve displacement movement, thereby generating a linear displacement of the spot. For example: When the lead screw mechanism rotates 360°, it will cause the linear displacement of the spot moving device fixed on it to be 5 mm. The linear displacement of the spot moving device is reflected in the laser output of the handpiece as a change in the spot size.

[0155] The data logical relationships among the rotation angle of the lead screw, the number of output pulses of the encoder, the linear displacement of the light spot, and the size of the light spot are established through the above steps. For example, when the encoder rotates 360°, the encoder outputs 1440 pulses, corresponding to a linear displacement of the light spot of 5 mm and a light spot size of 5 (the unit can be quantitatively set according to the light spot diameter output by the handpiece in actual applications).

[0156] Finally, through the software

[0157] do{

[0158] okflag = 1;

[0159] delay_us(30);

[0160] }

[0161] while(cntValue - hValue != 0);

[0162] In this way, the software automatically converts the received input light spot size into the position control parameters that need to be moved, thereby realizing the highly accurate automatic adjustment of the position.

[0163] Those skilled in the art can understand that after reading the content of this application, the foregoing application content may be presented only by way of example and may not be restrictive. Although not explicitly stated here, those skilled in the art can understand that this application is intended to encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are within the spirit and scope of the exemplary embodiments of this application.

Claims

1. A laser treatment handpiece, characterized in that, it includes a handpiece body, an incident mirror assembly and a movable mirror assembly; the handpiece body has an optical path cavity and a motor cavity, the optical path cavity axially penetrates the handpiece body, and the motor cavity is arranged on one side of the optical path cavity; the incident mirror assembly is placed at one end of the optical path cavity, and the incident mirror assembly includes an incident mirror barrel and a first lens placed in the incident mirror barrel; the movable mirror assembly includes a communication cable, a driving motor, a transmission assembly connected to the driving motor, and a second lens connected to the transmission assembly; wherein, the driving motor and the transmission assembly are placed in the motor cavity, the second lens is located in the optical path cavity and corresponds to the first lens, the driving motor is used to drive the transmission assembly to drive the second lens to move relative to the first lens, and the communication cable is used to realize the communication connection between the driving motor and the host, feedback the operating parameters of the driving motor to the host, and / or transmit the control parameters output by the host to the driving motor.

2. The laser treatment handpiece according to claim 1, characterized in that, it further includes a distance measuring assembly arranged on the handpiece body, the distance measuring assembly is used to detect the distance between the handpiece body and the target working surface, and the distance measuring assembly includes at least one conductive contact leg, and the contact leg is electrically connected to the communication cable.

3. The laser treatment handpiece according to claim 1, characterized in that, the laser treatment handpiece further includes an upper end cover assembly connected to the handpiece body, and the upper end cover assembly includes an upper end cover and a control cable; the end of the control cable is fixed in the upper end cover and connected to a terminal, and the terminal is located in a cable cavity above the motor cavity and connected to the communication cable; the incident mirror barrel is fixed to the upper end cover and cooperates with the upper end cover to seal the optical path cavity.

4. The laser treatment handpiece according to claim 3, characterized in that, the upper end cover has an upper end cover boss, and the handpiece body also has a stepped tooth, and the control cable is pressed between the upper end cover boss and the stepped tooth.

5. The laser treatment handpiece according to claim 1, characterized in that, it further includes a window mirror assembly placed in the handpiece body and sealing the other end of the optical path cavity, and the window mirror assembly includes a window mirror barrel and a window mirror placed in the window mirror barrel, and the window mirror faces the first lens and the second lens.

6. The laser treatment handpiece according to claim 2, characterized in that, it further includes an electrode assembly and a lower end cover assembly, the electrode assembly includes a conductive contact head electrically connected to the communication cable and exposed from the handpiece body, and the lower end cover assembly includes a lower end cover and a transfer conductive structure installed on the lower end cover; wherein, the lower end cover is connected to the handpiece body, and the distance measuring assembly is connected to the lower end cover; the transfer conductive structure includes a conductive part in contact conduction with the conductive contact head and an elastic conductive part connected to the conductive part, and the elastic conductive part is in contact conduction with the contact leg.

7. The laser treatment handpiece according to claim 6, characterized in that, The laser treatment handpiece further comprises a window mirror assembly disposed in the handpiece handle and sealing the other end of the optical path cavity. The lower end cover also has a receiving cavity for receiving the elastic conductive member, a window mirror cavity for receiving the window mirror assembly and communicating with the optical path cavity, and a through hole passing through the receiving cavity and the window mirror cavity; The elastic conductive member includes a spring sheet and a cylindrical contact connected to the spring sheet, and the cylindrical contact is located in the through hole; The distance measuring assembly includes a sleeve seat for mounting the contact leg, the sleeve seat is provided with a slot for exposing a portion of the contact leg, the sleeve seat is fixed in the cavity of the window mirror, the cylindrical contact is stuck in the slot and contacts the contact leg.

8. The laser treatment handpiece according to claim 7, It is characterized in that The window mirror assembly includes a window barrel and a window mirror placed in the window barrel; the inner wall of the window mirror cavity has a first conical surface structure, the outer wall of the window barrel has a second conical surface structure, and the window barrel passes through the lower end cover to make the first conical surface structure match and fit with the second conical surface structure.

9. The laser treatment handpiece according to claim 2, It is characterized in that The communication cable includes a motor cable and an electrode cable, wherein the motor cable and the electrode cable are respectively connected to wiring terminals, and the wiring terminals are placed in a cable cavity above the motor cavity; the motor cable is connected to the drive motor, and the electrode cable is electrically connected to the contact foot.

10. The laser treatment handpiece according to claim 1, It is characterized in that The transmission assembly includes a transmission bearing, a screw mechanism and a lens holder connected to the screw mechanism, the screw mechanism is connected to the drive motor and is rotatably supported in the transmission bearing, and the second lens is installed in the lens holder; And / or, the drive motor is provided with an encoder.

11. A laser treatment device, It is characterized in that It comprises a host and the laser therapy handpiece according to any one of claims 1 to 10; the host comprises a laser and a main control board, and the main control board is connected to a communication cable.

12. A method for controlling a laser treatment handpiece, It is characterized in that The laser treatment handpiece comprises: a first lens, a driving motor, and a second lens connected to the driving motor; the second lens faces the first lens and moves relative to the first lens under the drive of the driving motor; The control method comprises: Setting the spot parameters output by the laser treatment handpiece, wherein the spot parameters include the spot size; Determining a current spot size output by the laser treatment handpiece; Determining the displacement direction and moving distance of the second lens according to the set spot size and the current spot size; According to the determined displacement direction and the moving distance, control parameters of the driving motor are determined and output.

13. A method for controlling a laser treatment device, It is characterized in that The laser treatment device comprises a host and a laser treatment handpiece according to any one of claims 1 to 10, wherein the host comprises a laser and a main control board, and the main control board is communicatively connected with the laser and the laser treatment handpiece; The control method comprises: Set the spot parameters output by the laser treatment handpiece, where the spot parameters include the spot size; Determine the current spot size output by the laser treatment handpiece; Determine the displacement direction and moving distance of the second lens according to the set spot size and the current spot size; Determine and output the control parameters of the drive motor according to the determined displacement direction and the moving distance; Control the drive motor to operate according to the control parameters, and determine whether the second lens has moved to a preset position; Detect the current distance between the laser treatment handpiece and the target working surface, and determine whether the current distance is within a threshold range; When the second lens has moved to the preset position and the current distance is within the threshold range, control the laser to start.

14. The control method according to claim 12 or 13, characterized in that, the current spot size is determined according to the current distance between the first lens and the second lens, or the current spot size is read from a data memory.

15. The control method according to claim 12 or 13, characterized in that, the spot parameters are input through a human-machine interaction module, and / or the information of the laser treatment handpiece is output through the human-machine interaction module, where the information includes the position information of the second lens and / or the current spot size output by the laser treatment handpiece.

16. The control method according to claim 13, characterized in that, an encoder is provided on the drive motor, and the controlling the drive motor to operate and determining whether the second lens has moved to a preset position includes: counting the output pulses of the encoder; when the count of the output pulses of the encoder reaches the determined number of output pulses of the encoder, determining that the second lens has moved to the preset position; where the determined number of output pulses of the encoder is related to the determined moving distance of the second lens.

17. The control method according to claim 13, characterized in that, the detecting the current distance between the laser treatment handpiece and the target working surface and determining whether the current distance is within a threshold range includes: collecting the electrical parameters of the contact foot, where the contact foot is installed on the laser treatment handpiece; determining whether the current distance is within the threshold range according to whether the collected electrical parameters are within a preset range.

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