Non-reflection galvanometer laser swing output method, output structure and deformable output head

Abstract

The invention discloses a non-reflection galvanometer laser swing output method, a non-reflection galvanometer laser swing output structure and a deformable output head. The non-reflection galvanometer laser swing output method comprises the steps that S100, an output section of an energy transmission optical fiber is cut flatly and then welded to a quartz vertebral mirror; s200, protecting and fixing a section of optical fiber adjacent to the quartz vertebral mirror and the quartz vertebral mirror by using a bare optical fiber protection sleeve, and stopping the external acting force on the optical fiber outside the bare optical fiber protection sleeve; and S300, applying an external force by using the electromagnetic assembly to enable the bare fiber protection sleeve to generate tiny swing smaller than + / -1 degrees, so that the laser beam generates swing output meeting the application requirement of laser welding. The handheld laser swing output head is small and exquisite, light in weight, free of a reflection light path, easy to debug and easy to maintain, can be suitable for being held for a long time like a conventional handheld laser swing output head, and can extend into a narrow space into which the previous handheld laser swing output head cannot enter to carry out laser application operation by changing the shape.

Description

Technical Field

[0001] The present invention belongs to the field of laser technology, and specifically relates to a non-reflective galvanometer laser swing output method, output structure, and deformable output head. Background Art

[0002] Due to its many advantages, fiber lasers have developed rapidly in recent years. In recent years, the laser swing output technology based on reflective galvanometers has expanded the application of fiber lasers beyond the field of sheet metal cutting. Especially in the field of handheld laser welding, the handheld laser output head based on this technology has made laser welding technology simple and easy to use. Because the processing speed and quality are several times that of traditional electric welding, it has been very popular in the market.

[0003] However, current handheld laser output heads based on reflective galvanometers (CN115722796A, CN116727849A, CN112643202A) have a core component for generating laser swing output, which is the galvanometer system. This system takes up a relatively large volume and weight, and the cost of reflective galvanometers that can withstand high-power lasers is relatively high.

[0004] Due to the existence of the reflective optical path, the optical path debugging becomes complex and time-consuming, and the failure rate increases. The galvanometer system lacks a mechanical damping mechanism, making it prone to deviation, which can cause the inside of the laser output head to be damaged by the laser. Moreover, due to the lack of a necessary damping mechanism, the galvanometer system cannot self-reset in the event of abnormal power-off, and the deflection direction is random, which is very dangerous for high-power laser applications.

[0005] Another common headache for users with current handheld laser swing output heads based on reflective galvanometer systems is that the laser output head cannot flexibly change its shape due to the limitations of the reflective galvanometer optical path. In some special cases, such as when performing laser application operations inside low and narrow workpieces, this type of handheld laser output head based on the reflective galvanometer system is difficult to handle. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a non-reflective galvanometer laser swing output method, output structure, and deformable output head.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A non-reflective galvanometer laser swing output method includes the following steps:

[0009] S100 Cut the output cross-section of the energy transmission fiber flat and then fuse it with a quartz cone mirror.

[0010] S200 Protect and fix a section of the fiber adjacent to the quartz cone mirror and its quartz cone mirror with a bare fiber protective sleeve, so that the external force on the fiber is blocked outside the bare fiber protective sleeve.

[0011] The S300 uses an electromagnetic component to apply an external force to cause a small swing of less than ±1° in the bare fiber sheath, so that the laser beam generates a swing output that meets the requirements of laser welding applications.

[0012] For the invented energy transmission fiber, an optical fiber with a cladding diameter of 200 - 300 μm is selected. A part of the coating layer is removed from the invented energy transmission fiber to form a bare fiber, and the diameter of the quartz cone lens is 4 - 8 mm.

[0013] A cavity is provided inside the bare fiber sheath. The quartz cone lens and a part of the bare fiber are installed in the cavity, and the bare fiber is suspended in the cavity. The part of the invented energy transmission fiber with the coating layer is fixedly connected to the bare fiber sheath.

[0014] The bare fiber sheath is provided with a thread for easy connection. A flexible hose fixing hole and a thermistor mounting hole are provided inside the bare fiber sheath. The invented energy transmission fiber passes through the flexible hose fixing hole, and a thermistor is embedded in the thermistor mounting hole.

[0015] A non - reflective galvanometer laser swing output structure includes an energy transmission fiber, a quartz cone lens, a bare fiber sheath, a swing frame, an electromagnetic component, a flexible hose, an armored tube, and an armored tube fixing head. A part of the coating layer of the energy transmission fiber is removed to form a bare fiber. The bare fiber is connected to the quartz cone lens, and the bare fiber and the quartz cone lens are installed in the bare fiber sheath. The energy transmission fiber is connected to the flexible hose, the flexible hose is connected to the armored tube through the armored tube fixing head, the bare fiber sheath is installed in the swing frame, the electromagnetic component is arranged in the swing frame, and the inner diameter of the flexible hose is larger than the outer diameter of the energy transmission fiber, so that the energy transmission fiber can swing inside the flexible hose.

[0016] A swing sleeve is provided inside the swing frame, and the quartz cone lens is installed in the swing sleeve. A damping member is also provided inside the swing frame, and the damping member forms a damping effect on the swing sleeve.

[0017] Swing slide tray is symmetrically arranged up and down inside the swing frame. A swing slide is provided on the swing sleeve, and the swing slide is slidably connected to the swing slide tray. An electromagnetic component is arranged on each side of the swing frame. The damping component is a linear spring and is connected to abut against the swing sleeve. The electromagnetic component includes an electromagnetic coil and a permanent magnet. The electromagnetic coil is installed on the swing frame, and the permanent magnet is installed on the swing sleeve, and the permanent magnet and the electromagnetic coil are distributed opposite to each other.

[0018] A non - reflective galvanometer laser deformable output head includes an output structure, a gun grip, a rotating shaft, a gun body main body, a collimating lens, and a focusing lens. The gun grip is rotatably connected to the gun body main body through the rotating shaft. The collimating lens and the focusing lens are installed at one end of the gun body main body, the output structure extends into the gun body main body, and the swing frame is located inside the gun body main body.

[0019] The output structure includes an energy transmission optical fiber, a quartz cone mirror, a bare optical fiber protective sleeve, a swing frame, an electromagnetic component, a flexible hose, an armored pipe, and an armored pipe fixing head. A part of the energy transmission optical fiber is stripped of the coating layer to form a bare optical fiber, which is connected to the quartz cone mirror. The bare optical fiber and the quartz cone mirror are inserted into the bare optical fiber protective sleeve. The energy transmission optical fiber is connected to the flexible hose, and the flexible hose is connected to the armored pipe through the armored pipe fixing head. The bare optical fiber protective sleeve is inserted into the swing frame, and the electromagnetic component is arranged in the swing frame. The armored pipe fixing head and the armored pipe are located in the gun grip, and the flexible hose extends from the gun grip into the gun body main body.

[0020] A rotation limiting surface is provided on the gun grip, and the gun body main body rotates circumferentially around the gun grip through a rotating shaft. Description of the Drawings

[0021] Figure 1 It is a schematic flow chart of the method of the present invention;

[0022] Figure 2 It is a schematic diagram of the assembly process of the output head in the present invention;

[0023] Figure 3 It is a schematic diagram for calculating the swing relationship;

[0024] Figure 4 It is a three-dimensional structure schematic diagram of the output structure in the present invention;

[0025] Figure 5 It is a schematic diagram of the flexible hose connection in the present invention;

[0026] Figure 6 It is an assembly schematic diagram of the swing frame in the present invention;

[0027] Figure 7 It is an exploded structure schematic diagram of the swing frame in the present invention;

[0028] Figure 8 It is a schematic diagram of the first electromagnetic force mode of the electromagnetic component in the present invention;

[0029] Figure 9 It is a schematic diagram of the second electromagnetic force mode of the electromagnetic component in the present invention;

[0030] Figure 10 It is a three-dimensional structure schematic diagram of the deformable output head in the present invention;

[0031] Figure 11 It is a schematic diagram of the rotation state of the deformable output head in the present invention. Detailed Embodiments

[0032] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. This is 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. Therefore, it should not be construed as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example 1

[0036] As Figure 1 shown, a method for non-reflective galvanometer laser swing output includes the following steps:

[0037] S100 Cut the output section of the energy transmission fiber 1 of the invention flat and then fuse on the quartz cone mirror 2;

[0038] S200 Protect and fix a section of the fiber adjacent to the quartz cone mirror 2 and its quartz cone mirror with the bare fiber protection sleeve 3, so that the external force on the fiber is blocked outside the bare fiber protection sleeve and cannot affect the fusion point of the fiber and the quartz cone mirror inside the bare fiber protection sleeve;

[0039] The S300 uses an electromagnetic component to apply an external force to cause a slight swing of the bare fiber protective sleeve of less than ±1°, so that the laser beam generates a swing output that meets the requirements of laser welding applications. The optical fiber has a flexible property, so it can swing within a small range without being damaged.

[0040] The energy transmission optical fiber 1 described above is preferably an optical fiber with a smaller cladding diameter and better flexibility, and is selected as an optical fiber with a cladding diameter of 250 μm; the energy transmission optical fiber 1 is fused with a quartz cone lens 2 through a bare optical fiber 11 that has been stripped of the coating layer and cut flat. The quartz cone lens 2 is the same as the quartz cone lens inside the conventional QBH optical cable of the fiber laser, and does not change the beam quality. It is only used to reduce the energy density of the laser output end face to ensure the safety of the optical path; the quartz cone lens is a cone lens with a diameter of 4 mm, which is lighter and reduces the weight.

[0041] For better installation, a glue injection port 31, a notch 34 and an internal cavity 32 are provided on the encapsulation shell 3, where the quartz cone lens 2 is fixed by a low refractive index glue injected through the glue injection port 31; after the energy transmission optical fiber 1 is straightened, the bare optical fiber 11 part is suspended in the cavity 32 of the bare fiber protective sleeve 3. The notch 34 on the bare fiber protective sleeve 3 is another glue injection port, which is used to fix a section of the energy transmission optical fiber 1 with a coating layer, so as to prevent the external force acting on the energy transmission optical fiber 1 from being transmitted to the bare optical fiber 11 and its fusion point with the quartz cone lens 2, causing the bare optical fiber 11 to break or the fusion point to break. The bare fiber protective sleeve 3 is also provided with a flexible hose fixing hole 35 for protecting the energy transmission optical fiber 1, a thermistor mounting hole 36, and a thread 33 for facilitating connection with the swing mechanism. The flexible hose fixing hole 35 is convenient for installing and connecting with an external flexible hose, and the thermistor mounting hole 36 is used for installing a micro thermistor.

[0042] Reference Figure 3 As shown, since the optical fiber has a flexible property, especially the optical fiber with a coating layer, applying an external force to the bare fiber protective sleeve 3 to cause a high-speed and small-amplitude swing will drive the optical fiber to shake, but will not damage the optical fiber; in actual laser processing applications, the outgoing optical path is relatively long, so referring to the attached Figure 3 As shown in the trigonometric function relationship, the swing angle θ of the bare fiber protective sleeve 3 can be calculated.

[0043] L3 = L1 × Tan(θ) (1)

[0044] L4 = 2 × L3 (2)

[0045] Where L4 is the scanning width of the laser on the workpiece to be processed. The current mainstream laser oscillating welding machine has an oscillating width of approximately 3 - 5 mm. Here, L4 takes the maximum value of 5 mm; L1 is the distance from the emitted laser to the workpiece to be processed. When the optical path system uses a conventional F150 mm focusing lens, the distance from the focusing lens to the workpiece is at least 150 mm. L3 is the half-width, and it directly satisfies the relationship (1) with L1. Here, L1 takes the minimum value of 150 mm; Through equations (1) and (2), it can be deduced that the applied force only needs to make the bare fiber sheath 3 produce a small swing of less than ±1° to meet the requirements of the laser processing technology. Therefore, the electromagnetic component can adopt an electromagnetic coil, such as an audio coil, in cooperation with a magnet, such as a neodymium magnet, and a linear damping member, such as a spring coil, to make the bare fiber sheath 3 produce a small and controllable swing.

[0046] In the above way, effective laser output is achieved to meet the processing requirements.

[0047] Embodiment 2

[0048] Reference Figures 4 - 9 As shown, a non-reflective galvanometer laser oscillating output structure includes an energy transmission fiber 1, a quartz prism 2, a bare fiber sheath 3, an oscillating frame 5, an electromagnetic component, a flexible hose 9, an armored tube 11, and an armored tube fixing head 10. A part of the energy transmission fiber 1 removes the coating layer to form a bare fiber 11. The bare fiber 11 is connected to the quartz prism 2, and the bare fiber 11 and the quartz prism 2 are installed in the bare fiber sheath 3. The energy transmission fiber 1 is connected to the flexible hose 9, and the flexible hose 9 is connected to the armored tube 11 through the armored tube fixing head 10. The bare fiber sheath 3 is installed in the oscillating frame 5, and the electromagnetic component is arranged in the oscillating frame 5. The inner diameter of the flexible hose 9 is larger than the outer diameter of the energy transmission fiber 1, so that the energy transmission fiber can swing inside the flexible hose.

[0049] Among them, the flexible hose 9 passes through the flexible hose fixing hole 35 on the bare fiber sheath 3 and is fixed with structural glue. The other section of the flexible hose 9 passes through the armored tube fixing head 10 and is inserted into the armored tube 11 and fixed; the energy transmission fiber 1 passing through the flexible hose fixing hole 35 of the bare fiber sheath 3 enters the armored tube 11 through the flexible hose 9.

[0050] The inner diameter of the flexible hose 9 described is at least 1.5 times the diameter of the energy transmission fiber 1, so that when the bare fiber sheath 3 makes a small swing of less than ±1°, the energy transmission fiber 1 can be stretched as much as possible inside the flexible hose 9; The flexible hose 9 can be made of transparent or white Teflon material.

[0051] The bare fiber protection sleeve 3, the flexible hose 9, the armored tube 11, and the armored tube fixed head 10 together form a unified whole as a new type of optical cable. The most commonly used standard optical cable interfaces such as QBH and QD in the original fiber laser are rigidly connected to the armored tube. After replacing them with this new type of optical cable, it becomes a flexible connection.

[0052] A swing sleeve 4 is provided inside the swing frame 5, and the quartz cone mirror 2 is inserted into the swing sleeve 4. A damping member 7 is also provided inside the swing frame 5, and the damping member 7 forms a damping effect on the swing sleeve.

[0053] Swing slide trays 51 are symmetrically arranged up and down inside the swing frame 5. A swing slide 41 is provided on the swing sleeve 4, and the swing slide 41 is slidably connected to the swing slide tray 51. An electromagnetic component is provided on each side of the swing frame 5. The damping component 7 is a linear spring and is connected to abut against the swing sleeve 4. The electromagnetic component includes an electromagnetic coil 6 and a permanent magnet 8. The electromagnetic coil is installed on the swing frame, and the permanent magnet is installed on the swing sleeve. The permanent magnet and the electromagnetic coil are distributed opposite to each other.

[0054] Internal threads 43 that match the external threads 33 on the bare fiber protection sleeve 3 are provided inside the swing sleeve 4 for fixing the bare fiber protection sleeve 3. There are notches 44 for fixing the permanent magnet 8 on the swing sleeve 4, with one on each side symmetrically left and right, and the permanent magnet 8 is fixed by glue; there is a positioning groove 42 for the damping member 7 in front of each of the symmetrically left and right permanent magnet fixing notches 44.

[0055] Fixing grooves 52 for the electromagnetic coil 6 are provided at symmetrically opposite positions on the left and right sides of the swing frame 5, and the electromagnetic coil 8 is fixed by structural glue; fixing holes 53 for the damping member 7 are provided at the front ends of the symmetrically left and right fixing grooves 52, with internal threads that match the screw posts 71 on the damping member 7.

[0056] The swing sleeve 4 and the swing frame 5 are connected through the swing slide 41 and the swing slide tray 51. Preferably, the surfaces of the swing slide 41 and the swing slide tray 51 are smooth and flat, and the two are closely axially symmetrically connected, with a small amount of anti-volatile lubricating grease coated on the contact surface; a structure is formed that allows the swing sleeve 41 to only rotate along the horizontal direction; when the swing sleeve 4 and the swing frame 5 are connected through the swing slide 41 and the swing slide tray 51, the electromagnetic coil 6 and the permanent magnet 8 are exactly aligned. One end of the damping member 7 just enters the positioning groove 42 on the swing sleeve 4 to hold against the swing sleeve 4.

[0057] Preferably, the damping member 7 is a linear spring. By rotating the screw post 71, not only can the swing damping amount of the swing sleeve 4 inside the swing frame 5 be adjusted, but also the left and right offset amounts of the swing can be corrected: for example, when the swing sleeve 4 is too far to the right or left, the screw posts 71 of the damping members 7 on both sides are turned to complete the correction.

[0058] Preferably, the damping member 7 is a linear spring, which can reset the swinging sleeve 4 by itself in the case of abnormal power-off of the electromagnetic coil 6, avoiding the danger that the laser emission position is uncontrollable due to the random position of the reflecting lens after the power-off of the previous reflecting galvanometer system.

[0059] The relationship of the interaction force between the electromagnetic coil 6 and the permanent magnet 8 changes with the driving current as shown in Figure 8 When the current i applied by the driver D to the electromagnetic coil 6 changes periodically with time t, according to Ampere's right-hand screw rule, it can be known that the direction of the magnetic field generated by the electromagnetic coil 6 will also change with the change of the current direction. The magnitude of the resultant force F is determined by the amplitude of the current i; thus, the swinging sleeve 4 can be made to swing controllably in cooperation with the damping member 7.

[0060] Embodiment III

[0061] Mainly referring to Figure 10 and 11 As shown, a non-reflecting galvanometer laser deformable output head includes an output structure, a gun grip 12, a rotating shaft 13, a gun body main body 14, a collimating lens 15 and a focusing lens 16. The gun grip is rotationally connected to the gun body main body through the rotating shaft. The collimating lens and the focusing lens are installed at one end of the gun body main body. The output structure extends into the gun body main body, and the swinging frame is located inside the gun body main body.

[0062] The output structure includes an energy transmission optical fiber 1, a quartz cone lens 2, a bare optical fiber protection sleeve 3, a swinging frame 5, an electromagnetic assembly, a flexible hose 9, an armored tube 11 and an armored tube fixing head 10. A part of the energy transmission optical fiber 1 removes the coating layer to form a bare optical fiber 11. The bare optical fiber 11 is connected to the quartz cone lens 2. The bare optical fiber and the quartz cone lens are installed in the bare optical fiber protection sleeve. The energy transmission optical fiber is connected to the flexible hose. The flexible hose is connected to the armored tube through the armored tube fixing head. The bare optical fiber protection sleeve is installed in the swinging frame. The electromagnetic assembly is arranged in the swinging frame. The armored tube fixing head and the armored tube are located in the gun grip. The flexible hose extends from the gun grip into the gun body main body. Since the flexible hose 9 and the energy transmission optical fiber 1 inside it can be freely bent to a certain extent, the rotation of the gun grip 12 or the gun body main body 14 along the rotating shaft 13 does not affect the laser transmission.

[0063] The gun grip is provided with a rotational limiting surface. The gun body main body rotates circumferentially around the gun grip through the rotating shaft, and the rotation range is 135° to 180°, with a total free rotation angle of 45°.

[0064] Preferably, the collimating mirror 15 is an F50 collimating mirror (50 mm focal length), and the focusing mirror is at least an F150 (150 mm focal length) focusing mirror; referring to the appendix Figure 3Explanation: The distance of L1 from the laser to the workpiece now becomes the vertical distance (50 mm) to the collimator 15. L2 is the distance from the laser to the collimator 15 when it is deflected by 1°. According to the Pythagorean theorem and trigonometric function relations, it can be deduced that the distances from the laser to the collimator when the swing angles are 0° and 1° are nearly the same:

[0065] L2 2 = L1 2 +(L1×tan(1°)) 2 (3)

[0066] Substituting L1 = 50 mm into the above formula (3), we get L2 = 50.0076 mm. Since L2 is nearly equal to L1, when the swing is less than 1°, the distance from the focal point of the light spot after collimation and focusing to the light output end face is nearly the same. Thus, it can be seen that the method described in this application will not cause any change in the laser processing effect compared with the current swing laser output head based on the reflective galvanometer optical path; or rather, the method described in this application can completely replace the current swing laser output head based on the reflective galvanometer optical path.

[0067] Preferably, as shown in Figure 11 , the conventional form of the handheld deformable laser swing output head is the folded form, and the included angle between the gun grip 12 and the gun body main body 14 is 135°. This is the most suitable form for the operator to perform conventional handheld laser operations and is suitable for long-term holding operations: when the included angle between the output laser and the workpiece to be processed is 45°, the gun grip 12 held by the operator is exactly parallel to the workpiece to be processed, and the operation is relatively comfortable and suitable for long-term operations. Moreover, the armored tube 11 directly goes out along the gun grip 12, and the operator can use it in the same way as the previous conventional handheld swing laser output head without affecting comfort or increasing the adaptation cost additionally.

[0068] Referring to Figure 10 shown, when the included angle between the gun grip 12 and the gun body main body 14 is 180°, the entire laser output head can be competent for laser operations in narrow gaps that cannot be reached by the conventional form. This is exactly the ability that the current swing laser output head based on the reflective galvanometer does not possess.

[0069] It should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for laser oscillation output without a reflection galvanometer, characterized in that: The following steps are involved: S100 cuts the output section of the energy transmission fiber flat and then fuses it to the quartz lenticular lens; S200 protects and fixes a section of optical fiber adjacent to the quartz conical mirror and its quartz conical mirror with a bare optical fiber protective cover, so that the external force on the optical fiber is terminated outside the bare optical fiber protective cover; The S300 uses electromagnetic components to apply external force to make the bare optical fiber protective cover produce a tiny swing of less than ±1°, so that the laser beam produces a swing output that meets the requirements of laser welding applications.

2. The method for outputting laser oscillation without a reflection galvanometer according to claim 1, characterized in that: The energy transmission optical fiber invention selects an optical fiber with a cladding diameter of 200-300 μm, removes a portion of the coating layer on the energy transmission optical fiber invention to form a bare optical fiber, and the diameter of the quartz conical mirror is 4-8 mm.

3. The method for outputting laser oscillation without a reflection galvanometer according to claim 1, characterized in that: The bare fiber protective cover has a cavity inside, and the bare fiber protective cover installs the quartz cone and a part of the bare fiber in the cavity. The bare fiber is suspended in the cavity, and the part of the energy transmission fiber containing the coating layer is fixedly connected to the bare fiber protective cover.

4. The method for outputting laser oscillation without a reflection galvanometer according to claim 3, characterized in that: The bare optical fiber protective sleeve is provided with a thread for easy connection, and a flexible hose fixing hole and a thermistor mounting hole are provided in the bare optical fiber protective sleeve. The energy transmission optical fiber passes through the flexible hose fixing hole, and a thermistor is embedded in the thermistor mounting hole.

5. A non-reflection galvanometer laser oscillation output structure, characterized in that: It includes an energy transmission optical fiber, a quartz laminoscope, a bare optical fiber protective cover, a swing frame, an electromagnetic component, a flexible hose, an armored tube and an armored tube fixing head. A coating layer of a part of the energy transmission optical fiber is removed to form a bare optical fiber. The bare optical fiber is connected to the quartz laminoscope. The bare optical fiber and the quartz laminoscope are installed in a bare optical fiber protective cover. The energy transmission optical fiber is connected to the flexible hose. The flexible hose is connected to the armored tube through the armored tube fixing head. The bare optical fiber protective cover is installed in the swing frame. The electromagnetic component is arranged in the swing frame. The inner diameter of the flexible hose is larger than the outer diameter of the energy transmission optical fiber, so that the energy transmission optical fiber can swing in the flexible hose.

6. The non-reflection galvanometer laser oscillation output structure according to claim 5, characterized in that: A swing sleeve is arranged in the swing frame, and the quartz vertebral mirror is installed in the swing sleeve. A damping member is also arranged in the swing frame, and the damping member forms a damping effect on the swing sleeve.

7. The non-reflection galvanometer laser oscillation output structure according to claim 5, characterized in that: A swing slide tray is symmetrically arranged in the swing frame, and a swing slide is arranged on the swing sleeve. The swing slide is slidably connected to the swing slide tray. An electromagnetic component is arranged on each side of the swing frame. The damping component is a linear spring, which is connected to the top of the swing sleeve. The electromagnetic component includes an electromagnetic coil and a permanent magnet. The electromagnetic coil is installed on the swing frame, and the permanent magnet is installed on the swing sleeve. The permanent magnet and the electromagnetic coil are distributed opposite to each other.

8. A non-reflection galvanometer laser deformable output head according to claim 7, characterized in that: It includes an output structure, a gun grip, a rotating shaft, a gun body, a collimating lens and a focusing lens. The gun grip is rotatably connected to the gun body through the rotating shaft. The collimating lens and the focusing lens are installed at one end of the gun body. The output structure extends into the gun body, and the swing frame is located in the gun body.

9. The deformable laser output head without a reflection galvanometer according to claim 8, characterized in that: The output structure includes an energy transmission optical fiber, a quartz laminoscope, a bare optical fiber protective cover, a swing frame, an electromagnetic assembly, a flexible hose, an armored tube and an armored tube fixing head. A portion of the energy transmission optical fiber is stripped of its coating to form a bare optical fiber. The bare optical fiber is connected to the quartz laminoscope. The bare optical fiber and the quartz laminoscope are installed in a bare optical fiber protective cover. The energy transmission optical fiber is connected to the flexible hose. The flexible hose is connected to the armored tube through an armored tube fixing head. The bare optical fiber protective cover is installed in the swing frame. The electromagnetic assembly is arranged in the swing frame. The armored tube fixing head and the armored tube are located in a gun grip. The flexible hose extends from the gun grip to the main body of the gun.

10. The deformable laser output head without a reflection galvanometer according to claim 9, characterized in that: The gun grip is provided with a rotation limiting surface, and the gun body rotates in a circle around the gun grip through the rotating shaft.

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