CN113843511A

CN113843511A - Self-adjusting laser intensity's hand-held type laser marking machine

Info

Publication number: CN113843511A
Application number: CN202111067603.XA
Authority: CN
Inventors: 王青
Original assignee: Wuhan Xiantong Technology Co ltd
Current assignee: Wuhan Xiantong Technology Co ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2021-12-28
Anticipated expiration: 2041-09-13
Also published as: CN113843511B

Abstract

The application relates to a handheld laser marking machine capable of automatically adjusting laser intensity, in particular to the field of laser marking machines, which comprises a shell, a fixed block and a light emitting mechanism, wherein the fixed block is arranged in the shell, an installation cavity is formed in the fixed block, the light emitting mechanism is arranged in the installation cavity, a roughness detecting piece, a light intensity adjusting mechanism and a control system are also arranged in the shell, and the roughness detecting piece is arranged corresponding to a laser light outlet of the shell and is used for detecting the surface roughness of a marking object; the light intensity adjusting mechanism is arranged at the light outlet of the mounting cavity and used for adjusting the light outlet amount of the mounting cavity; the control system is electrically connected with the light emitting mechanism, the roughness detecting piece and the light intensity adjusting mechanism. This application has the effect that can go on becoming more meticulous the regulation to laser output intensity.

Description

Self-adjusting laser intensity's hand-held type laser marking machine

Technical Field

The application relates to the field of laser marking machines, in particular to a handheld laser marking machine capable of automatically adjusting laser intensity.

Background

The laser marking machine is a marking device which irradiates laser beams to cause chemical and physical changes on the surface layer of a material to form nicks. The method has wide application in various fields such as electronic components, integrated circuits, electrical appliances, mobile phone communication, hardware products, tool accessories, precision instruments and the like. The current laser marking device has gradually developed from a large device to an integrated portable device.

For example, chinese utility model patent document No. 202021068817.X discloses a hand-held laser marking machine, which comprises a main housing, an isolator, a photoelectric switch, a galvanometer component, a field lens and a focusing block detachably connected with the main housing, wherein the main housing comprises a handle portion and a marking portion communicated with the handle portion; the handle part comprises an isolator accommodating cavity and a switch groove, the isolator is arranged in the isolator accommodating cavity, and the photoelectric switch is communicated with a switch operation part on the outer side of the main shell through the switch groove; the marking part comprises a vibrating mirror assembly accommodating cavity and a field lens hole, the vibrating mirror assembly accommodating cavity is communicated with the field lens hole, and the field lens is installed in the field lens hole.

In view of the above-mentioned related technologies, the inventor believes that after the laser marking machine is integrated into a handheld type, the application range is improved, the marking is often required to be performed on materials with large property differences such as material and surface roughness, and different laser output intensities are required to be used, but the existing handheld laser marking machine is difficult to realize fine adjustment of the laser output intensity.

Disclosure of Invention

In order to realize the regulation that becomes more meticulous to laser output intensity, this application provides a hand-held type laser marking machine of self-interacting laser intensity.

The application provides a hand-held type laser marking machine of self-interacting laser intensity adopts following technical scheme:

the handheld laser marking machine capable of automatically adjusting the laser intensity comprises a shell, a fixed block and a light emitting mechanism, wherein the fixed block is arranged in the shell, an installation cavity is formed in the fixed block, the light emitting mechanism is arranged in the installation cavity, a roughness detecting piece, a light intensity adjusting mechanism and a control system are further arranged in the shell, and the roughness detecting piece is arranged corresponding to a laser light outlet of the shell and used for detecting the surface roughness of a marked object; the light intensity adjusting mechanism is arranged at the light outlet of the mounting cavity and used for adjusting the light outlet amount of the mounting cavity; the control system is electrically connected with the light emitting mechanism, the roughness detecting piece and the light intensity adjusting mechanism.

By adopting the technical scheme, the marking objects made of different materials are marked, and the control system is used for controlling the laser light source, so that the output intensity of the laser light source is matched with the material of the marking objects; for the marking objects with the same or close to the same material, the roughness of the surface of the marking object is detected through a roughness detection piece, if the roughness is higher, the corresponding diffuse reflection degree is also higher, and a light intensity adjusting mechanism needs to be correspondingly adjusted through a control system so as to adjust the light output, so that the fine adjustment of the light output quantity is realized; through the cooperation adjustment to laser light source and light intensity adjustment mechanism, realize the adjustment that becomes more meticulous to laser output intensity for hand-held type laser marking machine can beat mark to more manifold material, has promoted hand-held type laser marking machine's suitability.

Optionally, the light intensity adjusting mechanism includes a light-emitting tube and an adjusting component disposed on the light-emitting tube, and the adjusting component is configured to adjust a light-emitting area of the light-emitting tube.

Through adopting above-mentioned technical scheme to the mode of adjusting light-emitting area realizes the adjustment to the light-emitting volume, need not additionally to add too much structure and can realize, is favorable to hand-held type laser marking machine to keep less volume and lower weight, facilitates the use.

Optionally, the adjusting component includes an opening and closing component and a driving component, the opening and closing component includes a cover cap, a gear ring and a plurality of rotating components, the cover cap is disposed at a light emitting end of the light emitting tube, a light emitting hole is coaxially disposed at the middle part of the cover cap, the light emitting hole is coaxial with the light emitting tube, the gear ring is coaxially sleeved on the cover cap and is rotatably connected with the cover cap, the rotating component includes a three-tip splicing block and a linkage rod, all the three-tip splicing blocks can splice a disc for plugging the light emitting hole, a side wall of the three-tip splicing block in the disc is in an arc shape, a tip angle part of the three-tip splicing block is rotatably connected with the cover cap through a first rotating shaft, the first rotating shaft is disposed at the periphery of the light emitting hole, the axis of the first rotating shaft is parallel to the axis of the cover cap, the three-tip splicing block is far away from another tip angle part of the light emitting hole and fixedly connected with one end of the linkage rod, one end of the linkage rod, which is far away from the three-tip splicing block, is rotatably connected with the toothed ring through a second rotating shaft, and the second rotating shaft is parallel to the first rotating shaft; the driving component is used for driving the gear ring to rotate in a reciprocating mode.

Through adopting above-mentioned technical scheme, when needing to adjust the light output, rotate the ring gear, the ring gear drives the gangbar and rotates, and the three-point splice piece rotates around first pivot under the gangbar drive, and the space size between each three-point splice piece changes thereupon, reaches the effect of adjustment light output, and the even rule in light output clearance moreover for the laser that finally jets out keeps concentrating, and the mark of beating is more clear.

Optionally, the driving part includes a servo motor and a gear, the servo motor is fixedly arranged in the housing, the gear is coaxially arranged on the output shaft of the servo motor, and the gear is meshed with the gear ring.

Through adopting above-mentioned technical scheme, utilize servo motor can carry out the characteristics of low-speed bidirectional output, realize the drive to the ring gear, the drive precision is high, helps further promoting to adjust the fineness.

Optionally, a reflective layer is disposed on one side of the three-tip splicing block, which is close to the light outlet.

Through adopting above-mentioned technical scheme, reflect the laser of shining on three sharp splice by the reflection stratum, help reducing the laser and shine the loss speed of the three sharp splice that lead to, promote the life of three sharp splice.

Optionally, a gap is provided between the three-pointed splicing block and the sleeve cover.

Through adopting above-mentioned technical scheme, avoid three sharp splice to rotate the in-process and rub repeatedly between the upper shield, reduce the impaired possibility of reflection stratum, promote the life of reflection stratum.

Optionally, the light-emitting mechanism includes a packaging tube, a laser light source, a beam combiner and a focusing lens, the laser light source and the beam combiner are both disposed in the packaging tube, the beam combiner is disposed on the light-emitting side of the laser light source, and the focusing lens is disposed on the side of the beam combiner far away from the laser light source.

By adopting the technical scheme, the beam combining mirror is arranged at the light outlet end of the laser light source, so that the laser is immediately adjusted into parallel light by scattered light after emitting out of a light source exit point, the energy lost due to diffuse reflection is reduced, and the power loss of the laser light source is reduced, namely, a small-volume laser light source with lower power can be adopted to output laser with higher energy level, and the volume and the weight of the handheld laser marking machine are favorably reduced; meanwhile, the installation mode that the focusing lens follows the beam combining mirror is adopted, the volume of the lens can be reduced by 80% under the existing process condition, the energy loss of a laser light source can be reduced by more than 70%, namely, the volume of the focusing lens is miniaturized as much as possible under the condition of no extra loss of light energy, and the optical path system of the core of the laser marking machine is highly integrated.

Optionally, the laser light source includes a plurality of laser light sources connected in parallel, and the laser light sources are all electrically connected to the control system.

By adopting the technical scheme, the light emitting quantity of the laser light source is convenient to control.

In summary, the present application includes at least one of the following beneficial technical effects:

marking marks made of different materials, and controlling a laser light source through a control system to enable the output intensity of the laser light source to be matched with the materials of the marks; for the marking objects with the same or close to the same material, the roughness of the surface of the marking object is detected through a roughness detection piece, if the roughness is higher, the corresponding diffuse reflection degree is also higher, and a light intensity adjusting mechanism needs to be correspondingly adjusted through a control system so as to adjust the light output, so that the fine adjustment of the light output quantity is realized; through the matching adjustment of the laser light source and the light intensity adjusting mechanism, the fine adjustment of the laser output intensity is realized, so that the handheld laser marking machine can mark more various materials, and the applicability of the handheld laser marking machine is improved;

when the light emitting quantity needs to be adjusted, the gear ring is rotated, the gear ring drives the linkage rod to rotate, the three-tip splicing blocks are driven by the linkage rod to rotate around the first rotating shaft, the size of gaps among the three-tip splicing blocks is changed accordingly, the effect of adjusting the light emitting quantity is achieved, light emitting gaps are uniform and regular, finally emitted laser keeps concentrated, and the emitted marks are clearer;

the laser irradiated on the three-tip splicing block is reflected by the reflecting layer, so that the loss speed of the three-tip splicing block caused by laser irradiation is reduced, and the service life of the three-tip splicing block is prolonged.

Drawings

Fig. 1 is a schematic overall structure diagram of a self-adjusting laser intensity handheld laser marking machine according to an embodiment of the present application.

Fig. 2 is a schematic diagram of the internal structure of the self-adjusting laser intensity hand-held laser marking machine of fig. 1.

Fig. 3 is a schematic view of the internal structure of the inner case.

Fig. 4 is a schematic cross-sectional view of the fixing block and the light emitting mechanism in fig. 3.

Fig. 5 is a schematic structural view of a portion a in fig. 3.

Fig. 6 is a schematic view of the light shield of fig. 1.

Reference numerals: 1. a housing; 11. an inner housing; 111. a partition plate; 112. a first accommodating cavity; 1121. a heat radiation fan; 1122. an air inlet; 113. a second accommodating cavity; 1131. a laser light outlet; 1132. a blocking lens; 12. an outer housing; 121. heat dissipation holes; 122. a handle; 123. a control button; 2. an optical path system; 21. a light emitting mechanism; 211. a fixed block; 2111. a heat sink; 2112. a mounting cavity; 212. a laser light source; 213. a beam combining mirror; 214. packaging the tube; 215. a focusing lens; 22. a galvanometer mechanism; 221. a fixed seat; 222. an X galvanometer motor; 223. a Y galvanometer motor; 3. a control system; 31. a control screen; 4. a power supply system; 41. a power adapter; 42. a battery storage tank; 421. a box cover; 43. a USB power supply connector; 44. a DC supply connection; 5. a light shield; 51. marking a mark opening; 52. a sliding door; 521. a shifting shaft; 53. a waist-shaped through groove; 6. a light amount adjusting system; 61. a roughness detecting member; 62. a light intensity adjusting mechanism; 621. a light-emitting tube; 622. an opening and closing member; 6221. covering; 62211. a first rotating shaft; 6222. a toothed ring; 62221. a second rotating shaft; 6223. a rotating member; 62231. a three-tip splice block; 62232. a linkage rod; 623. a drive member; 6231. a servo motor; 6232. a gear.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses hand-held type laser marking machine of self-interacting laser intensity. Referring to fig. 1, 2 and 3, the self-adjusting laser intensity hand-held laser marking machine includes a main body and a light shield 5 fastened to a lower portion of the main body. The host computer includes casing 1, optical path system 2, control system 3, power supply system 4 and light intensity governing system 6, casing 1 includes shell body 12 and interior casing 11, interior casing 11 passes through the bolt fastening in shell body 12, optical path system 2 installs in interior casing 11, louvre 121 has been seted up on shell body 12, control system 3 and power supply system 4 are all installed on shell body 12, light intensity governing system 6 includes roughness measurement piece 61 and light intensity adjustment mechanism 62, roughness measurement piece 61 and light intensity adjustment mechanism 62 are all installed in interior casing 11. The power supply system 4 supplies power to the optical path system 2 and the control system 3, and the control system 3 controls the optical path system 2 to emit laser and controls the light quantity adjusting system 6 to adjust the light quantity.

Referring to fig. 1 and 2, the power supply system 4 is disposed on the top of the outer casing 12, and includes a power adapter 41 and a power supply assembly, the power adapter 41 is adhered to the inner wall of the outer casing 12, the power supply assembly includes a battery storage box 42, a USB power connector 43 and a DC power connector 44, the battery storage box 42 is integrally installed on one side of the top of the outer casing 12, a box cover 421 is disposed on the upper cover of the battery storage box 42, the USB power connector 43 and the DC power connector 44 are adhered to the side wall of the outer casing 12 near the battery storage box 42 side by side, and power output ends of the battery storage box 42, the USB power connector 43 and the DC power connector 44 are all electrically connected with the power adapter 41. The top of the outer shell 12 is also integrally provided with a handle 122, and a control button 123 is clamped on the handle 122.

Referring to fig. 1, the control system 3 includes a controller and a control panel 31 electrically connected to the power adapter 41, the controller is also electrically connected to the control panel 31, a window is formed on the outer casing 12, the control panel 31 is adhered to the window, the controller is adhered to one side of the control panel 31 close to the inner casing 11, and the controller is not shown in the figure.

Referring to fig. 2, in order to separate and rapidly dissipate heat generated by the operation of the handheld laser marking machine, a partition plate 111 is provided in the inner housing 11, the partition plate 111 separates the inner cavity of the inner housing 11 into a first accommodating cavity 112 and a second accommodating cavity 113, the optical path system 2 includes a light emitting mechanism 21 and a galvanometer mechanism 22, the fixing block 211 is installed in the first accommodating cavity 112, in this embodiment, the fixing block 211 is a copper block, which also serves as a heat dissipating block to rapidly dissipate heat from the laser light source 212 while fixing the laser light source 212, the surface of the fixing block 211 is spaced apart to be provided with a plurality of heat dissipating grooves 2111, a heat dissipating fan 1121 is clamped on the side wall of the first accommodating cavity 112 opposite to the partition plate 111, and an air inlet 1122 is provided on one side of the bottom wall of the first accommodating cavity 112 close to the laser light outlet 1131. The galvanometer mechanism 22 and the roughness detecting piece 61 are both installed in the second accommodating cavity 113, a laser light outlet 1131 is formed in the bottom wall of the second accommodating cavity 113 close to one side of the partition plate 111, and a separation lens 1132 is clamped on the laser light outlet 1131.

Referring to fig. 3 and 4, an installation cavity 2112 is formed in the middle of the fixing block 211 along the length direction of the outer housing 12, the installation cavity 2112 penetrates through the fixing block 211, and an air inlet end of the heat dissipation fan 1121 is opposite to the installation cavity 2112. The light emitting mechanism 21 comprises a packaging tube 214, a laser light source 212, a beam combining mirror 213 and a focusing lens 215, the light intensity adjusting mechanism 62 comprises a light emitting tube 621 and an adjusting component, the light emitting tube 621 is clamped in the installation cavity 2112, the wall of the installation cavity 2112 is coated with heat-conducting silicone grease for improving heat conduction efficiency, the encapsulation tube 214 is inserted into one end of the light-emitting tube 621 close to the heat-dissipating fan 1121, the laser source 212 and the beam combiner 213 are encapsulated in the encapsulation tube 214, the laser source 212 includes a plurality of parallel laser sources, each of which is electrically connected to the controller, and the beam combiner 213 is located at an end of the laser source close to the light emitting barrel 621, in this embodiment, the packaging tube 214 is made of a copper tube, the loss after laser emission is reduced by utilizing the characteristic that the copper material has better light reflectivity, the laser light source 212 is electrically connected with the power adapter 41 and the controller, and the laser light source 212 is also electrically connected with the control button 123; the focusing lens 215 is clamped in the inner cavity of the light-emitting tube 621, and the light-emitting end of the light-emitting tube 621 extends out of the mounting cavity 2112 and penetrates through the partition plate 111 to extend into the second accommodating cavity 113.

Referring to fig. 3, 4 and 5, the adjusting assembly includes an opening and closing member 622 and a driving member 623, the opening and closing member 622 is installed at one end of the light-emitting barrel 621 extending into the second accommodating cavity 113, the opening and closing member 622 includes a cover 6221, a toothed ring 6222 and a plurality of sets of rotating members 6223, the cover 6221 is covered at the light-emitting end of the light-emitting barrel 621, a light-emitting hole is coaxially formed in the middle of the cover 6221, the light-emitting hole is coaxial with the light-emitting barrel 621, and the toothed ring 6222 is coaxially sleeved on the cover 6221 and rotatably connected with the cover 6221; the rotating piece 6223 comprises three-tip splicing pieces 62231 and a linkage rod 62232, all the three-tip splicing pieces 62231 can be spliced into a disc for plugging the light outlet, the side wall of the three-tip splicing piece 62231 in the disc is in arc-shaped arrangement, a sharp corner of the three-tip splicing piece 62231 is rotatably connected with the sleeve cover 6221 through a first rotating shaft 62211, the first rotating shaft 62211 is welded on the sleeve cover 6221 and is located on the periphery of the light outlet, the axis of the first rotating shaft 62211 is parallel to the axis of the sleeve cover 6221, and a gap is reserved between the three-tip splicing piece 62231 and the sleeve cover 6221. The other sharp corner of the three-pointed splicing block 62231, which is far away from the light outlet, is welded with one end of the linkage rod 62232, one end of the linkage rod 62232, which is far away from the three-pointed splicing block 62231, is rotatably connected with the toothed ring 6222 through a second rotating shaft 62221, and the second rotating shaft 62221 is parallel to the first rotating shaft 62211, is inserted in the shaft side of the toothed ring 6222, and is fixed on the toothed ring 6222 through a nut in threaded connection. The driving member 623 comprises a servo motor 6231 and a gear 6232, the servo motor 6231 is fixed on the inner wall of the second accommodating cavity 113 through a bolt, the gear 6232 is coaxially welded on the output shaft of the servo motor 6231, and the gear 6232 is meshed with the toothed ring 6222. The side of the three-pointed splicing block 62231 close to the light outlet is coated with a reflective layer, in this embodiment, the reflective layer is a silver plating layer, which is not shown in the figure.

Referring to fig. 2, fig. 3 and fig. 4, the mirror vibration mechanism 22 includes a fixing base 221 welded in the inner housing 11, and an X mirror vibration motor 222 and a Y mirror vibration motor 223 fastened to the fixing base 221, the fixing base 221 is in an L-shaped configuration, the X mirror vibration motor 222 is fastened to a longitudinal side wall of the fixing base 221, the Y mirror vibration motor 223 is fastened to a lateral side wall of the fixing base 221, a reflector of the X mirror vibration motor 222 is disposed corresponding to the focusing lens 215, a reflector of the Y mirror vibration motor 223 is disposed corresponding to the stress light outlet 1131, and both the X mirror vibration motor 222 and the Y mirror vibration motor 223 are electrically connected to the controller. The roughness detection piece 61 is fixed on the fixing seat 221 through a bolt, in this embodiment, a photoelectric sensor is adopted, a light emitting end of the photoelectric sensor is arranged towards the laser light emitting port 1131, and the photoelectric sensor is electrically connected with the controller.

Referring to fig. 6, light shield 5 includes the cover body and installs the sliding door 52 in the cover body bottom, and mark mouth 51 has been seted up to the cover body bottom, marks mouth 51 and corresponds laser light-emitting port 1131 setting, and sliding door 52 installs between laser light-emitting port 1131 and mark mouth 51, and is close to and marks mouth 51 setting to seal mark mouth 51. In this embodiment, the sliding door 52 is a split sliding door 52, two leaves of the split sliding door 52 are both connected with a shifting shaft 521, two kidney-shaped through slots 53 are formed in the side wall of the cover body corresponding to the two shifting shafts 521, and the two shifting shafts 521 extend out of the kidney-shaped through slots 53. The light shield 5 is also provided with heat dissipation holes 121.

The implementation principle of the handheld laser marking machine capable of self-adjusting laser intensity of the embodiment of the application is as follows:

when marking objects of different materials are marked, the adjusting control system 3 controls the number of the laser sources, so that the output intensity of the laser light source 212 is matched with the materials of the marked objects; and to the marker of the same or close material, hug closely 5 diapalls the lens hood on the marker surface, through roughness detection piece 61, photoelectric sensor detects marker surface roughness promptly, and feed back to the controller, if the roughness is higher, controller control servo motor 6231 starts, drive gear 6232 and rotate, gear 6232 drives toothed ring 6222 and rotates, toothed ring 6222 drives gangbar 62232 and rotates, three sharp splice pieces 62231 rotate around first pivot 62211 under the drive of gangbar 62232, the size of the space between each three sharp splice piece 62231 changes thereupon, reach the adjustment light-emitting area, and then the effect of adjustment light-emitting quantity. After the light emitting area is adjusted, the content to be marked is input on the control screen 31, the handheld laser marking machine is moved to enable the marking opening 51 to be opposite to the position to be marked, then the control button 123 is pressed, the laser light source 212 emits laser, the laser irradiates on the reflector of the X-ray vibrating mirror motor 222 through the beam combiner 213 and the focusing lens 215 in sequence, the laser is reflected to the reflector of the Y-ray vibrating mirror motor 223 through the reflector of the X-ray vibrating mirror motor 222, then is reflected out of the laser light emitting opening 1131 through the reflector of the Y-ray vibrating mirror motor 223 and finally irradiates on the surface of a marked object, and then the controller controls the reflectors of the X-ray vibrating mirror motor 222 and the Y-ray vibrating mirror motor 223 to rotate, so that the laser irradiation position is adjusted and marks are marked.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. Self-interacting laser intensity's hand-held type laser marking machine, including casing (1), fixed block (211) and light-emitting mechanism (21), fixed block (211) set up in casing (1), installation cavity (2112) have been seted up on fixed block (211), be provided with light-emitting mechanism (21), its characterized in that in installation cavity (2112): the shell (1) is also internally provided with a roughness detection piece (61), a light intensity adjusting mechanism (62) and a control system (3), wherein the roughness detection piece (61) is arranged corresponding to the laser light outlet (1131) of the shell (1) and is used for detecting the surface roughness of the marking object; the light intensity adjusting mechanism (62) is arranged at the light outlet of the installation cavity (2112) and is used for adjusting the light outlet amount of the installation cavity (2112); the control system (3) is electrically connected with the light emitting mechanism (21), the roughness detecting piece (61) and the light intensity adjusting mechanism (62).

2. The self-adjusting laser intensity handheld laser marking machine of claim 1, wherein: the light intensity adjusting mechanism (62) comprises a light emitting tube (621) and an adjusting component arranged on the light emitting tube (621), and the adjusting component is used for adjusting the light emitting area of the light emitting tube (621).

3. The self-adjusting laser intensity handheld laser marking machine of claim 2, wherein: the adjusting component comprises an opening and closing component (622) and a driving component (623), the opening and closing component (622) comprises a cover cap (6221), a toothed ring (6222) and a plurality of groups of rotating pieces (6223), the cover cap (6221) is covered at the light emitting end of the light emitting barrel (621), the middle part of the cover cap (6221) is coaxially provided with a light emitting hole, the light emitting hole is coaxial with the light emitting barrel (621), the toothed ring (6222) is coaxially sleeved on the cover cap (6221) and is rotationally connected with the cover cap (6221), each rotating piece (6223) comprises a three-tip splicing block (62231) and a linkage rod (62232), all the three-tip splicing blocks (62231) can be spliced to form a disc for plugging the light emitting hole, the side wall of the three-tip splicing block (62231) in the disc is arranged in an arc shape, one tip of a corner of the three-tip splicing block (62231) is rotationally connected with the cover cap (6221) through a first rotating shaft (62211), the first rotating shaft (62211) is arranged on the periphery of the light outlet, the axis of the first rotating shaft (62211) is parallel to the axis of the sleeve cover (6221), the other sharp corner part of the three-sharp splicing block (62231) far away from the light outlet is fixedly connected with one end of a linkage rod (62232), one end of the linkage rod (62232) far away from the three-sharp splicing block (62231) is rotatably connected with the toothed ring (6222) through a second rotating shaft (62221), and the second rotating shaft (62221) is parallel to the first rotating shaft (62211); the driving component (623) is used for driving the toothed ring (6222) to rotate back and forth.

4. The self-adjusting laser intensity handheld laser marking machine of claim 3, wherein: the driving component (623) comprises a servo motor (6231) and a gear (6232), the servo motor (6231) is fixedly arranged in the shell (1), the gear (6232) is coaxially arranged on an output shaft of the servo motor (6231), and the gear (6232) is meshed with a toothed ring (6222).

5. The self-adjusting laser intensity handheld laser marking machine of claim 3, wherein: and a reflecting layer is arranged on one side of the three-tip splicing block (62231) close to the light outlet.

6. The self-adjusting laser intensity handheld laser marking machine of claim 5, wherein: a gap is arranged between the three-pointed splicing block (62231) and the sleeve cover (6221).

7. The self-adjusting laser intensity handheld laser marking machine of claim 1, wherein: the light emitting mechanism (21) comprises a packaging tube (214), a laser light source (212), a beam combining mirror (213) and a focusing lens (215), the laser light source (212) and the beam combining mirror (213) are arranged in the packaging tube (214), the beam combining mirror (213) is arranged on the light emitting side of the laser light source (212), and the focusing lens (215) is arranged on one side, away from the laser light source (212), of the beam combining mirror (213).

8. The self-adjusting laser intensity handheld laser marking machine of claim 7, wherein: the laser light source (212) comprises a plurality of parallel laser light sources, which are all electrically connected with a control system (3).