Handheld laser welding gun

Abstract

The utility model discloses a handheld laser welding gun, which belongs to the technical field of laser welding and comprises a gun body and a laser channel in the gun body, one end of the laser channel is connected with a gun head, one end of the laser channel is connected with a laser collimation module, and an optical fiber is connected with one end of the laser collimation module; incident light sequentially passes through the laser collimation module, the laser reflecting mirror, the collecting mirror and the gun head. The shell is detachably mounted at the bottom of the gun body; the galvanometer motor is fixed to the gun body and located in the shell. The protective glass is detachably mounted in the gun body; the airflow channel is used for being connected with an air pump to blow air to the gun head and dissipate heat in the welding gun; the control panel is located in the shell; and the button module is embedded on the shell. Compared with an existing laser welding gun with a reflector adjusting function, the handheld laser welding gun has the advantages that the control panel of the motor is integrated into the cavity, and the problem of interference of control signals of the motor can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the technical field of laser welding, and more specifically, to a handheld laser welding gun. Background Technology

[0002] Manual laser welding is a technology that uses a handheld laser welding gun to focus a high-energy laser beam onto a metal surface, utilizing the laser's thermal effect to fuse materials together. Its core characteristics are non-contact processing, high precision, and low heat input, making it suitable for complex workpieces and on-site operations. Compared to traditional manual welding, manual laser welding offers higher welding speed and precision, and does not rely on skilled workers. Currently, it is being actively developed by major companies as a transitional product to traditional manual welding.

[0003] Patent application number 202310082289.5 discloses a laser welding gun, including a welding gun body. The welding gun body has a laser channel and an airflow channel inside. The laser channel has a laser collimator, a laser reflector, a laser focusing lens, a detection module, and a protective lens arranged sequentially from the input port to the output port inside the laser channel. The input end of the laser collimator has an optical fiber terminal, and the output end of the laser collimator has a laser collimator. Both the output ends of the laser collimator and the laser reflector have temperature monitoring devices. The laser reflector has a calibration unit. The detection module is used to detect the angle of the laser line output to the protective lens, and the calibration unit is used to calibrate the angle of the laser reflector. The input end of the airflow channel has an input air nozzle, and the airflow channel has an output air pipe inside the airflow channel. The output end of the output air pipe extends into the interior of the laser channel, and the end of the output air pipe faces the output side of the protective lens.

[0004] The laser welding gun disclosed in the above patent has the following problems after actual production and use:

[0005] The aforementioned laser welding gun is also the mainstream welding gun currently. The motor inside is used to control the laser reflector. Its control panel is integrated into an external control box. The control box is then connected to the control button inside the welding gun via a control cable. In order to increase the range of movement of construction personnel, this control cable can usually reach 10m. However, excessively long control cables need to consider the problem of signal control interference.

[0006] The air blowing and airflow channels inside the aforementioned laser welding gun are integrally machined with the outer shell, resulting in high material waste and increased costs.

[0007] The aforementioned laser welding gun has a low degree of modularity in its casing, making it inconvenient to install a control panel. Summary of the Invention

[0008] To overcome the problems mentioned in the background, this utility model provides a handheld laser welding gun. By integrating the control panel for controlling the laser reflector motor into the welding gun, compared to the original method of integrating the control panel into the control box, this method of directly integrating the control panel into the welding gun can shorten the control line between the reflector adjustment motor and the control panel, and use the metal gun body for signal shielding to reduce signal interference.

[0009] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0010] A handheld laser welding gun includes a gun body and a laser channel inside the gun body. One end of the laser channel is connected to the gun head, and the other end is connected to a laser collimation module. An optical fiber is connected to one end of the laser collimation module. Incident light passes sequentially through the laser collimation module, a laser reflector, a condenser lens, and the gun head. A housing is detachably installed at the bottom of the gun body, and the laser collimation module is located inside the housing. A galvanometer motor is fixed to the gun body and located inside the housing, and its output end is connected to the laser reflector. A protective mirror is detachably installed inside the gun body and is located in the laser channel between the condenser lens and the gun head. An airflow channel is located inside the gun body, with one end of the airflow channel connected to the laser channel between the protective mirror and the gun head, and the other end of the airflow channel penetrating through the gun body wall. The gun body also includes a control panel located inside the housing, which includes a laser start / stop switch and a galvanometer motor switch. A button module is embedded in the housing and includes a laser start / stop button and a galvanometer motor button.

[0011] In the above embodiments, the external laser emitter is connected to one end of the laser collimation module via an optical fiber. After the laser is collimated and calibrated inside the welding torch, the incident light is reflected by the laser reflector, and the reflected light is focused into a spot by the condenser lens and finally emitted through the torch head. The laser reflector can adjust the incident angle of the incident light by the galvanometer motor to change the shape of the spot. In the working state, the high-pressure inert gas of the air pump can be connected to the airflow channel to prevent welding slag from entering the welding torch by blowing air. When not in use, a detachable protective lens is installed between the condenser lens and the torch head to prevent welding slag from entering the welding torch and contaminating the internal optical path. The laser start / stop button and the galvanometer motor button are integrated into the control panel. The control panel is installed on the bottom of the torch body on the side close to the fingers, and the button module is integrated into the outer shell. The start / stop of the laser and the galvanometer motor are controlled by the corresponding buttons.

[0012] Preferably, the control panel is fixed to the gun body with screws.

[0013] Preferably, a mounting hole is provided on the bottom of the gun body near the finger, and the control panel is installed in the mounting hole.

[0014] Preferably, the main body of the laser collimation module is a hollow tubular component with openings at both ends. The top of the hollow tubular component is inserted and installed at the bottom of the gun body through the bottom opening of the laser channel. The connection between the laser collimation module and the laser channel is sealed. The laser collimation module also includes a collimating lens at the top of the hollow tubular component and an optical fiber interface at the bottom of the hollow tubular component, with the optical fiber connected to the optical fiber interface.

[0015] Preferably, the connection between the laser collimation module and the laser channel is sealed using a mechanical seal, an epoxy resin seal, or a combination of both; the mechanical seal is an O-ring or a gasket.

[0016] Preferably, the outer casing includes a middle section casing and a tail end casing arranged sequentially below the gun body. The middle section casing includes a motor casing covering the galvanometer motor and a control panel casing covering the control panel. The motor casing and the control panel casing are detachably connected. The connection between the tail end casing and the laser collimation module is sealed.

[0017] Preferably, the connection between the tail end housing and the laser collimation module is sealed using a mechanical seal, an epoxy resin seal, or a combination of both; the mechanical seal is an O-ring or a gasket.

[0018] The motor housing, control panel housing, and tail end housing are segmented and can be manufactured by die casting. Compared to the original one-piece housing manufactured by machining, this improves material utilization and further reduces costs. The segmented housing allows for the separate disassembly of the control panel housing and the galvanometer motor housing, and also facilitates the maintenance of internal components of the gun.

[0019] Preferably, one end of the airflow channel is located between the control panel housing and the gun body; an airflow pipe connector is provided on the gun body wall at the end of the airflow channel, and an airflow pipe is connected to the airflow pipe connector, with the end of the airflow pipe passing through the tail end housing.

[0020] Preferably, the airflow tube is made of copper, which, while adapting to the above-mentioned air blowing, can remove the heat inside the gun body and cool down the internal temperature of the welding gun.

[0021] Preferably, the top of the gun body is provided with a mounting groove, and the condenser lens mounting base and the protective lens mounting base are detachably installed inside the mounting groove. The lower parts of the condenser lens mounting base and the protective lens mounting base are fixedly connected to the condenser lens and the protective lens in sequence.

[0022] Preferably, the condenser lens mounting base and the protective lens mounting base are fixed to the gun body by means of screw fixing or snap-fit.

[0023] Preferably, the lower part of the control panel housing is provided with a line interface, which is electrically connected to the control panel.

[0024] Preferably, the button module further includes a button mounting base, which is embedded inside the control panel housing; the laser start / stop button and the galvanometer motor button are movably mounted on the button mounting base; wherein,

[0025] One end of the laser start / stop button is rotatably connected to the button mounting base; the bottom contact of the other end of the laser start / stop button is pressed and engaged with the laser start / stop button; the bottom contact of the galvanometer motor button is pressed and engaged with the galvanometer motor button; the button module is also provided with a first elastic element for elastically resetting the laser start / stop button and the galvanometer motor button.

[0026] Preferably, the first elastic element is a reset spring or a reset metal sheet; at least one first elastic element is provided for the laser start / stop button.

[0027] Compared with the prior art, the beneficial effects of this utility model's technical solution are:

[0028] This invention provides a handheld laser welding gun. Compared to existing manual welding guns with reflector-adjustable motors, this design integrates the control panel directly into the welding gun, eliminating the need for an external control box, making the welding gun more portable and effectively reducing production costs. Furthermore, to accommodate the position of the control panel within the welding gun, an airflow pipe is incorporated, eliminating the original airflow channel integrally formed with the housing. This improves adaptability in position adjustment, and the airflow pipe is detachable and replaceable. Moreover, the control panel's location inside the welding gun allows for heat dissipation through airflow, achieving a cooling effect. Finally, to facilitate the installation of the control panel and the replacement of the galvanometer motor, the original integrated housing is split into separate housings for the control panel and galvanometer motor, making maintenance and replacement of these components easier. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a frontal cross-sectional view of the present invention.

[0031] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 3 This is a schematic diagram of the front view of the present invention after removing the outer shell;

[0033] Figure 4This is a schematic diagram showing the cross-sectional structure of the airflow pipe, airflow pipe connector, and airflow channel of this utility model;

[0034] Figure 5 For the present utility model Figure 1 Enlarged structural diagram of the button module.

[0035] The markings in the diagram are as follows: 1. Gun body; 2. Mid-section housing; 201. Motor housing; 202. Control panel housing; 3. Tail end housing; 301. Line interface; 4. Gun head; 5. Laser collimation module; 501. Collimating lens; 502. Fiber optic interface; 6. Laser reflector; 7. Galvanometer motor; 8. Condenser lens; 9. Condenser lens mounting base; 10. Protective lens; 11. Protective lens mounting base; 12. Button module; 1201. Button mounting base; 1202. Laser start / stop button; 1203. Galvanometer motor button; 1204. First elastic element; 13. Control panel; 14. Airflow pipe; 15. Airflow pipe connector; 16. Airflow channel. Detailed Implementation

[0036] To better understand the purpose, structure, and function of this utility model, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific preferred embodiments.

[0037] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. "First," "second," etc., do not indicate the importance of the components, and therefore should not be construed as a limitation of this utility model. The specific dimensions used in the embodiments are only for illustrating the technical solution and do not limit the scope of protection of this utility model. It is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings for those skilled in the art.

[0038] Unless otherwise expressly specified and limited, the terms "installation," "setting," "connection," and "fixation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] Existing manual welding guns, especially laser welding guns with internal reflector galvanometer motors, have their control units integrated into an external control box. This application is based on the above-mentioned structural improvements. Example

[0040] Please see Figure 1-4 The present application discloses a handheld laser welding gun, which includes a gun body 1. A laser channel is provided inside the gun body 1. One end of the laser channel is connected to the gun head 4, and the other end is connected to the laser collimation module 5. An optical fiber of an external laser emitter is connected to one end of the laser collimation module 5. The incident light is straightened by the laser collimation module 5 in sequence. After straightening, the light is reflected by the laser reflector 6. After reflection, the laser passes through the focusing lens 8 and finally passes through the gun head 4 to form a light spot suitable for welding.

[0041] The bottom of the gun body 1 is also provided with a detachable outer shell. The installation methods of the outer shell include screw fixing, snap-fit, glue bonding, etc., and the laser collimation module 5 is located inside the outer shell.

[0042] A galvanometer motor 7 is fixedly installed on the gun body 1. The outer shell covers the galvanometer motor 7. The output end of the galvanometer motor 7 is connected to the laser reflector 6 to adjust the incident light and change the shape of the light spot.

[0043] The gun body 1 is equipped with a detachable protective lens 10. The protective lens 10 is located in the laser channel between the condenser lens 8 and the gun head. When not in use, installing the protective lens 10 can prevent welding slag from entering the optical path inside the welding gun, effectively protecting the internal components of the welding gun. The detachable protective lens 10 is convenient for timely replacement.

[0044] As shown in Figure 4, an airflow channel 16 is provided inside the gun body 1. One end of the airflow channel 16 is connected to the laser channel between the protective mirror 10 and the gun head, and the other end of the airflow channel 1 passes through the wall of the gun body 1. An inert gas is blown into the airflow channel 16 by an air pump, which can effectively prevent welding slag from entering the welding gun through the gun head 4.

[0045] To integrate the control panel of the peripheral device onto the welding torch and avoid signal attenuation due to excessively long wiring, such as... Figure 1 As shown, a control panel 13 is provided between the outer shell and the gun body 1. The control panel 13 includes a laser start / stop switch and a galvanometer motor switch. The control panel 13 faces the direction of the fingers when holding the device, so that the device can be started and stopped by pressing.

[0046] like Figure 1 As shown, the control panel is fixed to the gun body with screws.

[0047] like Figure 1 As shown, a mounting hole is provided at the bottom of the gun body 1 near the finger side, and the control panel is embedded in the mounting hole.

[0048] As shown in Figure 2, a button module 12 is provided on the outer casing. The button module 12 is installed in an embedded manner. The button module 12 includes a laser start / stop button 1202 and a galvanometer motor button 1203, which control the laser start / stop and the galvanometer motor button 1203 in sequence.

[0049] More specifically, such as Figure 1 As shown, to facilitate the disassembly and assembly of the collimating lens 501, the main body of the laser collimating module 5 is a hollow tubular component with openings at both ends. The top of the hollow tubular component is inserted and installed at the bottom of the gun body 1 through the bottom opening of the laser channel. The connection between the laser collimating module 5 and the laser channel is sealed. The laser collimating module 5 also includes a collimating lens 501 at the top of the hollow tubular component and an optical fiber interface 502 at the bottom of the hollow tubular component, with the optical fiber connected to the optical fiber interface 502.

[0050] More specifically, the connection between the laser collimation module 5 and the laser channel is sealed using a mechanical seal, an epoxy resin seal, or a combination of both; the mechanical seal is an O-ring or a gasket.

[0051] The specific principle of the above embodiment is as follows: the external laser emitter is connected to the fiber optic interface 502, and the control panel 13 is connected to the external main control unit via a connecting cable. When the laser start / stop button 1202 is pressed, the laser enters the collimating lens 501 for alignment, and after being reflected by the laser reflector 6, it is focused by the condenser lens 8 to form a weldable spot. During this process, an inert gas is delivered to the airflow channel 16 by an air pump to prevent welding slag from entering the welding torch. When it is necessary to change according to the welding scenario, the laser reflector 6 is rotated by the galvanometer motor 7 to change the shape of the spot. After welding is stopped, a protective lens is installed to prevent welding slag from entering the welding torch. Example

[0052] like Figure 2 As shown, the difference from the above embodiment is that the outer shell includes a middle section shell 2 and a tail end shell 3 arranged sequentially below the gun body 1. The middle section shell 2 includes a motor shell 201 covering the galvanometer motor 7 and a control panel shell 202 covering the control panel 13. The motor shell 201 and the control panel shell 202 are detachably connected. The connection between the tail end shell 3 and the laser collimation module 5 is sealed.

[0053] like Figure 2 As shown, the motor housing 201 and the control panel housing 202 are fixed to the gun body 1 with screws. The gun body 1 should be provided with internal threaded holes adapted to the fixing screws. This application does not show the drawings, but those skilled in the art can understand it based on the content of the specification and the drawings. This application will not elaborate further.

[0054] More specifically, the connection between the tail housing 3 and the laser collimation module 5 is sealed using a mechanical seal, an epoxy resin seal, or a combination of both; the mechanical seal is an O-ring or a gasket.

[0055] More specifically, such as Figure 1 As shown, a line interface 301 is provided at the lower part of the control panel housing 202. The line interface 301 is electrically connected to the control panel 13. The internal wiring of the welding gun is set in an integrated manner to avoid redundant wiring.

[0056] More specifically, such as Figure 5 As shown, it also includes a button mounting base 1201, which is embedded inside the control panel housing 202; the laser start / stop button 1202 and the galvanometer motor button 1203 are movably mounted on the button mounting base 1201.

[0057] One end of the laser start / stop button 1202 is rotatably connected to the button mounting base 1201; the contact piece at the bottom of the other end of the laser start / stop button 1202 is pressed and engaged with the laser start / stop button 1202; the bottom contact piece of the galvanometer motor button 1203 is pressed and engaged with the galvanometer motor button 1203; the button module 12 is also provided with a first elastic element 1204 for elastically resetting the laser start / stop button 1202 and the galvanometer motor button 1203.

[0058] To help users distinguish the buttons on the welding gun, the size of the galvanometer motor button 1203 and the laser start / stop button 1202 is differentiated. The laser start / stop button 1202 is larger, and the pressing method of the laser start / stop button 1202 has changed from a circular button that is pressed directly to a method where one side is pressed and the other side is rotated, making it easier for users to distinguish the buttons during use.

[0059] More specifically, the first elastic element 1204 is a reset spring or a reset metal sheet; at least one first elastic element 1204 is provided for the laser start / stop button 1202.

[0060] like Figure 5 As shown, the contacts of the laser start / stop button 1202 and the galvanometer motor button 1203 are cylindrical, and the reset spring can be installed by means of a sleeve. For the large-sized laser start / stop button 1202, simply installing a reset spring at the contact position may not have a good elastic reset effect. Therefore, the reset effect is improved by setting a reset metal piece at the middle position of the bottom of the button.

[0061] It should be noted that, Figure 5 The reset metal plate shown in the figure is not two pieces. The reset metal plate shown in the figure is a state diagram of a single reset metal plate, indicating the displaceable position of the reset metal plate. This application will not elaborate further.

[0062] In this embodiment, by setting the housing as segmented, and compared with the original one-piece housing, the segmented design facilitates die casting. This makes the raw materials used in the production process more economical than machining, effectively reducing costs. Furthermore, the motor housing 201 or the control panel housing 202 can be disassembled separately. Compared with the original one-piece housing on the welding gun, the segmented housing does not require complete disassembly, making maintenance and replacement operations more convenient. Example

[0063] like Figure 3 and Figure 4 As shown, based on Embodiment 2, one end of the airflow channel 16 is located between the control panel housing 202 and the gun body 1; an airflow pipe connector 15 is provided on the wall of the gun body 1 at the end of the airflow channel 16, and an airflow pipe 14 is connected to the airflow pipe connector 15, with the end of the airflow pipe 14 passing through the tail end housing 3.

[0064] In this embodiment, by integrating the airflow pipe 14 into the housing 202 and the gun body 1, the purpose is twofold: firstly, after installing the control panel 13, the detachable airflow pipe 14 can be easily replaced according to the control panel model; secondly, the airflow pipe 14 can be made of high thermal conductivity pipes such as copper pipes, which can carry away some of the heat from the control panel 13 while the airflow is entering the pipe, thus achieving a heat dissipation effect.

[0065] It should be noted that manual welding guns are equipped with either air cooling or water cooling depending on the laser model. For example, air cooling is used for power below 1500W, while water cooling is used for power above 1500W. In this embodiment, the high thermal conductivity airflow pipe 14 is mainly used to blow air onto the nozzle of the gun head 4. Cooling is only an auxiliary function. It does not mean that no additional heat dissipation mechanism is needed. However, since the heat dissipation component is not within the scope of this application, it is not disclosed in the accompanying drawings. Example

[0066] like Figure 1 As shown, based on Embodiment 1, the top of the gun body 1 is provided with a mounting groove, and the condenser lens mounting base 9 and the protective lens mounting base 11 are detachably installed inside the mounting groove. The lower parts of the condenser lens mounting base 9 and the protective lens mounting base 11 are fixedly connected to the condenser lens 8 and the protective lens 10 in sequence.

[0067] This embodiment provides a method for installing the condenser lens 8 and the protective lens 10.

[0068] More specifically, the fixing methods of the condenser lens mounting base 9 and the protective lens mounting base 11 to the gun body 1 include screw fixing or snap-fit ​​engagement.

[0069] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A handheld laser welding gun, characterized in that: The system includes a gun body (1) and a laser channel inside the gun body (1). One end of the laser channel is connected to the gun head (4), and the other end is connected to the laser collimation module (5). An optical fiber is connected to one end of the laser collimation module (5). The incident light passes through the laser collimation module (5), the laser reflector (6), the condenser (8), and the gun head (4) in sequence. The outer shell is detachably installed at the bottom of the gun body (1), and the laser collimation module (5) is located inside the outer shell; The galvanometer motor (7) is fixed on the gun body (1) and located inside the outer shell. The output end of the galvanometer motor (7) is connected to the laser reflector (6). The protective lens (10) is detachably installed inside the gun body (1) and is located in the laser channel between the condenser lens (8) and the gun head; An airflow channel (16) is located inside the gun body (1). One end of the airflow channel (16) is connected to the laser channel between the protective mirror (10) and the gun head, and the other end of the airflow channel (1) penetrates the wall of the gun body (1). It also includes a control panel (13), which is located inside the housing and includes a laser start / stop switch and a galvanometer motor switch; Button module (12) is embedded in the housing. Button module (12) includes laser start / stop button (1202) and galvanometer motor button (1203).

2. The handheld laser welding gun according to claim 1, characterized in that, The main body of the laser collimation module (5) is a hollow tubular component with openings at both ends. The top of the hollow tubular component is inserted into the bottom of the gun body (1) through the bottom opening of the laser channel. The connection between the laser collimation module (5) and the laser channel is sealed. The laser collimation module (5) also includes a collimating lens (501) at the top of the hollow tubular component and an optical fiber interface (502) at the bottom of the hollow tubular component. The optical fiber is connected to the optical fiber interface (502).

3. The handheld laser welding gun according to claim 1, characterized in that, The outer shell includes a middle section shell (2) and a tail end shell (3) arranged sequentially below the gun body (1). The middle section shell (2) includes a motor shell (201) covering the galvanometer motor (7) and a control panel shell (202) covering the control panel (13). The motor shell (201) and the control panel shell (202) are detachably connected. The connection between the tail end shell (3) and the laser collimation module (5) is sealed.

4. The handheld laser welding gun according to claim 3, characterized in that, One end of the airflow channel (16) is located between the control panel housing (202) and the gun body (1); an airflow pipe connector (15) is provided on the wall of the gun body (1) at the end of the airflow channel (16), and an airflow pipe (14) is connected to the airflow pipe connector (15), with the end of the airflow pipe (14) passing through the tail end housing (3).

5. The handheld laser welding gun according to claim 1, characterized in that, The top of the gun body (1) is provided with a mounting groove. The condenser lens mounting base (9) and the protective lens mounting base (11) are detachably installed inside the mounting groove. The lower parts of the condenser lens mounting base (9) and the protective lens mounting base (11) are fixedly connected to the condenser lens (8) and the protective lens (10) in sequence.

6. The handheld laser welding gun according to claim 5, characterized in that, The fixing methods of the condenser lens mounting base (9), the protective lens mounting base (11), and the gun body (1) include screw fixing or snap-fit.

7. The handheld laser welding gun according to claim 3, characterized in that, The lower part of the control panel housing (202) is provided with a line interface (301), which is electrically connected to the control panel (13).

8. The handheld laser welding gun according to claim 3, characterized in that, The button module (12) further includes a button mounting base (1201), which is embedded inside the control panel housing (202); the laser start / stop button (1202) and the galvanometer motor button (1203) are movably mounted on the button mounting base (1201); wherein, One end of the laser start / stop button (1202) is rotatably connected to the button mounting base (1201); the contact at the bottom of the other end of the laser start / stop button (1202) is pressed and engaged with the laser start / stop button (1202); the bottom contact of the galvanometer motor button (1203) is pressed and engaged with the galvanometer motor button (1203); the button module (12) is also provided with a first elastic element (1204) for elastically resetting the laser start / stop button (1202) and the galvanometer motor button (1203).

9. The handheld laser welding gun according to claim 8, characterized in that, The first elastic element (1204) is a reset spring or a reset metal sheet; at least one first elastic element (1204) is provided for the laser start / stop button (1202).

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