Electric laser treatment hand tool with adjustable light spot size

Abstract

The utility model discloses an electric laser treatment hand tool capable of adjusting light spot size, comprising a hand tool housing, two sides of the hand tool housing are respectively provided with a wire harness inlet and a liquid nitrogen nozzle which are in butt joint with an inner cavity, and an optical fiber interface, a stepping motor and an electromagnetic valve which are in butt joint with the wire harness inlet are fixedly arranged in the hand tool housing. A moving groove is transversely formed in the center of an inner cavity of the hand tool shell and penetrates through one end of the hand tool shell, the power end of the stepping motor is fixedly connected with a lead screw, a shaping lens is movably arranged in an inner cavity of the moving groove, and a window piece is fixedly connected to the outer side end of the moving groove. The inner wall of the hand tool shell is fixedly connected with a shaping lens, and the original point groove type switch and the lower limiting groove type switch are in butt joint with the two sides of the lead screw respectively. The high-precision electric laser treatment hand tool is high in light spot size control precision and light spot recognition precision, a hand tool system does not need to be specially integrated with a light spot recognition module, and the system is simple.

Description

Technical Field

[0001] The utility model relates to the field of laser treatment instruments, in particular to an electric laser treatment hand tool with adjustable light spot size. Background Art

[0002] In laser treatment, the handpiece is a key component as the laser output terminal. It is responsible for transmitting the laser to the tissue to achieve the purpose of treatment or beauty. Different applications require different laser energy densities and thus different spot sizes. Therefore, the output spot size of the laser treatment handpiece is an important indicator for measuring the laser handpiece.

[0003] The traditional solution controls the output spot size by manually adjusting the position of the shaping lens inside the handpiece, such as the currently popular light-guide arm handpiece or the use of a handpiece set, multiple handpieces, each handpiece outputs a spot of different sizes, such as the Synolon 5Gmax handpiece and the Synoshow Elite handpiece. The first solution is manual adjustment, which has high requirements on the mechanical design of the system, and requires high design accuracy of key components and high-precision coordination between the mechanical parts of the handpiece. Otherwise, the manual debugging experience is extremely poor, and the performance is greatly reduced after multiple debugging. The second solution system requires multiple handpieces, which are cumbersome to replace. For example, 10 handpieces are required for 10 different sizes of spots, and the operating experience is poor. In addition, the handpiece spot recognition of the two traditional solutions is identified by integrating a recognition module inside the handpiece. The output spot step of traditional handpieces is generally 1mm or larger. Utility Model Content

[0004] The utility model solves the technical problems raised in the background technology by designing an electric laser treatment hand tool with adjustable spot size, and proposes the following technical solutions:

[0005] An electric laser treatment handpiece with adjustable spot size comprises a handpiece shell, with a wire harness inlet and a liquid nitrogen nozzle respectively arranged on both sides of the handpiece shell and connected to the inner cavity, an optical fiber interface, a stepper motor and a solenoid valve fixedly arranged inside the handpiece shell and connected to the wire harness inlet, the solenoid valve being connected to the liquid nitrogen nozzle through an air pipe, a moving groove being transversely arranged at the center of the inner cavity of the handpiece shell and penetrating one end of the handpiece shell, a screw rod being fixedly connected to the power end of the stepper motor, and a plastic lens being movably arranged in the inner cavity of the moving groove, a window piece being fixedly connected to the outer end of the moving groove, a plastic lens being fixedly connected to the inner wall of the handpiece shell, and an origin slot switch and a lower limit slot switch being respectively connected to the positions on both sides of the screw rod.

[0006] Preferably, the harness inlet is movably connected with an optical fiber, an air tube, and a control line, the optical fiber is connected to the optical fiber interface inside the hand tool shell, the air tube is connected to the solenoid valve inside the hand tool shell, and the control line is respectively connected to the stepper motor and the solenoid valve inside the hand tool shell.

[0007] Preferably, the reshaping lens is a convex lens, the upper end of the reshaping lens is fixedly connected with a slider, the slider is threadedly sleeved on the outside of the screw rod, and the upper end of the slider is in sliding contact with the inner wall of the hand tool housing.

[0008] Preferably, the slider is in active contact with the origin slot switch and the lower limit slot switch.

[0009] Preferably, a positioning scale is provided on one side of the hand tool housing close to the window sheet.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The high precision described in this patent refers to high precision in spot size control and high precision in spot recognition. The specific system uses a host computer to control a stepper motor and then controls the position of a plastic lens connected to the stepper motor lead screw to control the system output spot size. Due to the high precision in lens position control, the output spot size control precision is high. Moreover, the system identifies the position of the plastic lens and then identifies the system output spot size by identifying the state of the stepper motor through the host computer. Compared with traditional solutions, the recognition accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] In the figure: 1-wiring harness inlet, 2-optical fiber interface, 3-stepping motor, 4-screw, 5-shaping lens, 6-moving slot, 7-origin slot switch, 8-lower limit slot switch, 9-window, 10-positioning scale, 11-liquid nitrogen nozzle, 12-solenoid valve. DETAILED DESCRIPTION

[0014] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0015] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0016] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a communication between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] Reference Manual Attached Figure 1 , an electric laser treatment handpiece with adjustable spot size, including a handpiece shell, a harness inlet 1 and a liquid nitrogen nozzle 11 are respectively arranged on both sides of the handpiece shell, and an optical fiber interface 2, a stepper motor 3 and a solenoid valve 12 are fixedly arranged inside the handpiece shell, and the solenoid valve 12 is connected to the liquid nitrogen nozzle 11 through an air pipe. A moving groove 6 is horizontally arranged at the center position of the inner cavity of the handpiece shell and passes through one end of the handpiece shell. The power end of the stepper motor 3 is fixedly connected to a lead screw 4, and a plastic lens 5 is movably arranged in the inner cavity part of the moving groove 6, and a window piece 9 is fixedly connected to the outer end of the moving groove 6. The inner wall of the handpiece shell is fixedly connected to the plastic lens 5, and an origin slot switch 7 and a lower limit slot switch 8 are respectively connected to the positions on both sides of the lead screw 4, and a slider is fixedly connected to the upper end of the plastic lens 5, and the slider is threadedly sleeved on the outside of the lead screw 4, and the upper end of the slider is in sliding contact with the inner wall of the handpiece shell, and the slider is movably in contact with the origin slot switch 7 and the lower limit slot switch 8.

[0019] The harness inlet 1, the optical fiber, the air pipe, and the control line enter the hand tool housing from this inlet, the optical fiber is connected to the optical fiber interface 2 inside the hand tool housing, the air pipe is connected to the solenoid valve 12 inside the hand tool housing, and the control line is respectively connected to the stepper motor 3 and the solenoid valve 12 inside the hand tool housing. The stepper motor 3 is controlled by the host computer. The host computer sends a pulse, and the stepper motor performs a step angle rotation. The screw rod 4 is driven by the stepper motor 3. The stepper motor performs a step angle rotation, and the screw rod also rotates the same angle accordingly. The shaping lens 5 can be a convex lens or a lens group, which is connected to the screw rod 4. The rotation of the screw rod drives the shaping lens 5 to move along the screw rod 4. The hand tool housing system controls the output spot size of the hand tool housing by controlling the position of the shaping lens 5. The moving slot 6 is the moving range of the shaping lens. The origin slot switch 7 calibrates the origin position of the shaping lens. After the host computer gives an instruction to the stepper motor, before executing the second instruction, the shaping lens 5 will move to the origin position. The lower limit slot switch 8 calibrates the farthest position of the plastic lens from the origin. The origin position of the lens and the farthest position from the origin correspond to the maximum and minimum values ​​of the light spot output by the handpiece housing, respectively. The window piece 9 is mainly used to prevent dust and other substances from entering the inside of the handpiece housing. The positioning scale 10 accurately calibrates the working distance of the handpiece housing. The liquid nitrogen nozzle 11 is connected to the solenoid valve 12 through an air pipe, and the system is cooled by spraying liquid nitrogen. The nozzle direction intersects with the laser emission direction at the end of the scale to achieve precise positioning and cooling. The solenoid valve 12 is connected to the liquid nitrogen nozzle 11 at one end through an air pipe, and the other end is connected to the liquid nitrogen tank through an air pipe. The control line of the solenoid valve 12 is connected to the host computer, and the host computer can accurately control the opening and closing state of the solenoid valve 12, and then accurately control the opening and stopping time of the liquid nitrogen injection. The electric laser treatment handpiece housing scheme of this patent is suitable for connecting optical fiber to output laser. At the same time, the patent uses a stepper motor to control the lens position scheme to control the system output light spot scheme, which is also suitable for controlling free space lasers, such as used as a light guide arm. The optical fiber interface 2 in the patent solution is changed to an interface that adapts to the housing of the light guide arm handpiece. The high precision of this patent refers to the high precision of the spot size control and the high precision of the spot recognition. The specific system uses the host computer to control the stepper motor and then control the position of the shaping lens connected to the stepper motor screw to control the system output spot size. Due to the high precision of the lens position control, the output spot size control precision is high, and the system identifies the position of the shaping lens and then identifies the system output spot size by identifying the state of the stepper motor by the host computer. Compared with the traditional solution, the recognition accuracy is high.

[0020] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

Claims

1. An electric laser treatment handpiece with adjustable spot size, comprising a handpiece housing, characterized in that: A harness inlet (1) and a liquid nitrogen nozzle (11) are respectively arranged on both sides of the hand tool shell and are connected to the inner cavity. An optical fiber interface (2) connected to the harness inlet (1), a stepper motor (3), and a solenoid valve (12) are fixedly arranged inside the hand tool shell. The solenoid valve (12) is connected to the liquid nitrogen nozzle (11) through an air pipe. A movable groove (6) is transversely arranged at the center of the inner cavity of the hand tool shell and passes through one end of the hand tool shell. The power end of the stepper motor (3) is fixedly connected to a lead screw (4), and a plastic lens (5) is movably arranged in the inner cavity of the movable groove (6). A window sheet (9) is fixedly connected to the outer end of the movable groove (6). The plastic lens (5) is fixedly connected to the inner wall of the hand tool shell, and an origin slot switch (7) and a lower limit slot switch (8) are respectively connected to the positions on both sides of the lead screw (4).

2. The electric laser treatment handpiece with adjustable spot size according to claim 1, characterized in that: The harness inlet (1) is movably connected with an optical fiber, an air pipe, and a control line. The optical fiber is connected to an optical fiber interface (2) inside the hand tool housing, the air pipe is connected to an electromagnetic valve (12) inside the hand tool housing, and the control line is respectively connected to a stepper motor (3) and an electromagnetic valve (12) inside the hand tool housing.

3. The electric laser treatment handpiece with adjustable spot size according to claim 2, characterized in that: The shaping lens (5) is a convex lens, and the upper end of the shaping lens (5) is fixedly connected to a slider, the slider is threadedly sleeved on the outside of the screw rod (4), and the upper end of the slider is in sliding contact with the inner wall of the hand tool housing.

4. The electric laser treatment handpiece with adjustable spot size according to claim 3, characterized in that: The slide block is in active contact with an origin slot switch (7) and a lower limit slot switch (8).

5. The electric laser treatment handpiece with adjustable spot size according to claim 4, characterized in that: A positioning scale (10) is arranged on one side of the hand tool housing close to the window sheet (9).

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