Laser etching device with protective two-dimensional coding function

Abstract

The laser carving device comprises an operation table and a laser carving piece fixedly arranged on one side of the back face of the operation table, longitudinal electric sliding rails are fixedly arranged on one side of the front face and one side of the back face of the operation table, and a transverse electric sliding rail is arranged between the two longitudinal electric sliding rails in a sliding mode; and a protection frame is arranged on the bottom face of the transverse electric sliding rail, a movable plate is arranged in the protection frame, and a gluing mechanism is arranged on the surface of the movable plate. According to the laser etching device with the two-dimensional code protection function, through the arrangement of the gluing mechanism, after a two-dimensional code is subjected to laser etching on a PCB, three-proofing glue can be smeared on the surface of the two-dimensional code to protect the two-dimensional code, and compared with the mode that a high-temperature adhesive tape is adopted for pasting in the prior art, manpower waste can be reduced; and the three-proofing glue uniformly covers the surface of the two-dimensional code through automatic smearing, so that pollution to the two-dimensional code during subsequent PCB processing is avoided.

Description

Technical Field

[0001] The invention relates to the technical field, and in particular to a laser engraving device with a protective two-dimensional code. Background Art

[0002] Laser engraving machine uses laser beam to make permanent marks on the surface of various materials. The effect of marking is to expose the deeper material through the evaporation of the surface material, or to carve out traces through the chemical and physical changes of the surface material caused by light energy, or to burn part of the material through light energy to reveal the desired pattern or text.

[0003] According to the patent application number CN202021308545.6, when a laser engraving device is in use, a pair of workpieces are placed on a symmetrically arranged positioning plate, and then the two workpieces are respectively clamped by the positioning blocks and positioning columns on the symmetrically arranged positioning plate, and then the workpieces are laser engraved by the laser engraving parts. The symmetrically arranged positioning blocks and positioning columns are conducive to respectively adapting the workpieces, thereby preventing the workpieces from being misplaced, ensuring normal laser engraving of the workpieces, and preventing waste of resources. When a pair of workpieces are placed on the symmetrically arranged positioning plates, the workpieces are first placed in the limiting grooves, which is conducive to guiding and limiting the workpieces, and then further positioned by the positioning columns and positioning plates. When the waste and smoke in the exhaust fan are discharged, the waste and smoke enter the waste collection box through the collection pipe, which is convenient for collecting the waste and smoke, and is conducive to preventing the waste and smoke from causing pollution;

[0004] After the laser engraving device engraves the QR code onto the copper foil on the PCB board, there is no protection measure for the QR code. In the prior art, high-temperature tape is mostly pasted on the surface of the QR code for protection. However, the excessive viscosity of the tape may cause abnormal residual glue, which affects the subsequent use of the QR code, causing unnecessary rework and waste of manpower. It is difficult to achieve effective protection after the QR code is laser engraved. In addition, in the above patent, after laser engraving on one side of the PCB board, it needs to be manually flipped and clamped before the laser engraving operation on the other side can be performed, which is very inconvenient and increases labor. In view of the above shortcomings, the present invention makes the following improvements. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a laser engraving device with a protective two-dimensional code, which solves the problems mentioned in the background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a laser engraving device with a protective two-dimensional code, comprising an operating table and a laser engraving piece fixedly arranged on one side of the back of the operating table, a longitudinal electric slide rail is fixedly arranged on one side of the front and back of the operating table, and a transverse electric slide rail is slidably arranged between the two longitudinal electric slide rails, a protective frame is arranged on the bottom surface of the transverse electric slide rail, and a movable plate is arranged inside the protective frame, and a gluing mechanism is arranged on the surface of the movable plate;

[0007] The glue coating mechanism includes a first electric slide rail arranged inside the movable plate, and a glue storage box is slidably arranged on the bottom surface of the first electric slide rail, a fixed cylinder is arranged on the bottom surface of the glue storage box, and a coating roller is rotatably arranged on the surface of the fixed cylinder, a plurality of leakage holes are provided on the surface of the coating roller, through holes are provided on both sides of the fixed cylinder located inside the coating roller, a first double-rod hydraulic cylinder is fixedly arranged inside the fixed cylinder through a partition, and extrusion plates are fixedly arranged on the two protruding ends of the first double-rod hydraulic cylinder.

[0008] Preferably, both sides of the bottom surface of the glue storage box are connected with L-shaped discharge pipes, two L-shaped discharge pipes are provided, and one end of the two L-shaped discharge pipes is connected to the surface of the fixed cylinder.

[0009] Preferably, a sealing member is provided on the surface of the L-shaped discharge pipe, and the sealing member includes a mounting plate fixedly provided on the surface of the L-shaped discharge pipe, sealing covers are movably provided at both ends of the fixed cylinder and located on the surface of the L-shaped discharge pipe, an annular electromagnet and an annular iron block are respectively fixedly provided between the mounting plate and the opposite side of the sealing cover, and the annular electromagnet and the annular iron block are both sleeved on the surface of the L-shaped discharge pipe, and the top surface and bottom of one side of the mounting plate are fixedly connected to one side of the sealing cover through a buffer spring.

[0010] Preferably, a first electric push rod is fixedly provided on the bottom surface of the transverse electric slide rail, and the protruding end of the first electric push rod is fixedly connected to the top of the movable plate through a U-shaped plate, and both sides of the top surface of the protective frame are slidingly connected to the surface of the U-shaped plate through an L-shaped plate, and both sides of the U-shaped plate are provided with through grooves that are compatible with the L-shaped plate, and the top of the inner wall of the through groove is fixedly connected to the top surface of the L-shaped plate through a clamping spring.

[0011] Preferably, closing plates are slidably provided on both sides of the protective frame, a second electric push rod is rotatably provided on the surface of the L-shaped plate through a connecting shaft, and the protruding end of the second electric push rod is rotatably connected to one side of the closing plate, and an electric heating tube is provided on the bottom surface of the closing plate.

[0012] Preferably, a mounting table is slidably provided on the top surface of the operating table, and a clamping and flipping mechanism is provided on the top surface of the mounting table, the clamping and flipping mechanism includes support plates slidably provided on both sides of the top surface of the mounting table, and fixed frames are rotatably provided on opposite sides of the two support plates, a second double-rod hydraulic cylinder is rotatably provided inside the fixed frame, and gears are fixedly provided on the two protruding ends of the second double-rod hydraulic cylinder, clamping plates are provided on the front and back sides of the fixed frame, and limit plates are slidably provided on both sides inside the clamping plates, and teeth meshing with gears are fixedly provided in the middle of the opposite sides of the upper and lower limit plates.

[0013] Preferably, two pressing pads are provided on the surface of the limiting plate, and the two pressing pads are respectively provided in front and behind the teeth.

[0014] Preferably, a first motor is fixedly arranged inside the support plate, and the output end of the first motor is fixedly connected to one side of the fixed frame through a coupling, a second motor is fixedly arranged inside the fixed frame, and a driving gear is fixedly arranged on the output end of the second motor through a coupling, and a passive gear meshing with the driving gear is fixedly arranged on the surface of the second double-rod hydraulic cylinder.

[0015] Beneficial Effects

[0016] The present invention provides a laser engraving device with a protective two-dimensional code, which has the following beneficial effects compared with the prior art:

[0017] (1) The laser engraving device with a protective two-dimensional code can, through the setting of a glue coating mechanism, apply a three-proof glue on the surface of the two-dimensional code after the two-dimensional code is laser engraved on the PCB board to protect the two-dimensional code. Compared with the prior art that uses high-temperature tape for pasting, it can reduce manpower waste. The automatic coating makes the three-proof glue evenly cover the surface of the two-dimensional code, thereby avoiding contamination of the two-dimensional code during subsequent PCB processing.

[0018] (2) The laser engraving device with a protective two-dimensional code can close the through hole immediately after applying the three-proof glue by setting a sealing member, thereby avoiding the problem of waste of resources caused by overflow of the three-proof glue.

[0019] (3) The laser engraving device with a protective two-dimensional code can, through the setting of a clamping and flipping mechanism, complete the laser engraving of one side of the PCB board and then perform the laser engraving operation on the other side by controlling the PCB board to automatically flip, without the need for repeated manual loading and unloading, thus reducing labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of the structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the clamping and flipping mechanism of the present invention;

[0022] Figure 3 For the present invention Figure 1 A partial enlarged view of the middle A;

[0023] Figure 4 It is a structural schematic diagram of a second double-rod hydraulic cylinder of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the coating mechanism of the present invention;

[0025] Figure 6 It is a cross-sectional view of the fixed cylinder structure of the present invention;

[0026] Figure 7 It is a bottom view of the closed plate structure of the present invention.

[0027] In the figure: 1. operating table; 2. laser engraving; 3. longitudinal electric slide rail; 4. transverse electric slide rail; 5. protection frame; 6. movable plate; 7. glue coating mechanism; 71. first electric slide rail; 72. glue storage box; 73. fixing cylinder; 74. coating roller; 75. leakage hole; 76. through hole; 77. first double-rod hydraulic cylinder; 78. extrusion plate; 79. L-shaped discharge pipe; 8. sealing element; 81. mounting plate; 82. sealing cover; 83. annular electromagnet; 84. annular iron block; 85. buffer spring; 9 , clamping and flipping mechanism; 91, fixing frame; 92, second double-rod hydraulic cylinder; 93, clamping plate; 94, limiting plate; 95, gear; 96, clamping pad; 97, second motor; 98, driving gear; 99, passive gear; 910, first motor; 10, first electric push rod; 11, U-shaped plate; 12, L-shaped plate; 13, clamping spring; 14, closing plate; 15, mounting table; 16, second electric push rod; 17, electric heating tube; 18, third electric slide rail; 19, second electric slide rail. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] See also Figure 1 , Figure 3 , Figure 5 , Figure 6 as well as Figure 7 As shown, the present invention provides a technical solution, and the specific improvements are as follows:

[0031] A laser engraving device with a protective two-dimensional code comprises an operating table 1 and a laser engraving part 2 fixedly arranged on one side of the back of the operating table 1, longitudinal electric slide rails 3 are fixedly arranged on one side of the front and back of the operating table 1, and a transverse electric slide rail 4 is slidably arranged between the two longitudinal electric slide rails 3, a protective frame 5 is arranged on the bottom surface of the transverse electric slide rail 4, and a movable plate 6 is arranged inside the protective frame 5, a first electric push rod 10 is fixedly arranged on the bottom surface of the transverse electric slide rail 4, and the extended end of the first electric push rod 10 is fixedly connected to the top of the movable plate 6 through a U-shaped plate 11, both sides of the top surface of the protective frame 5 are slidably connected to the surface of the U-shaped plate 11 through an L-shaped plate 12, both sides of the U-shaped plate 11 are provided with through grooves adapted to the L-shaped plate 12, and the top of the inner wall of the through groove is fixedly connected to the top surface of the L-shaped plate 12 through a clamping spring 13;

[0032] The surface of the movable plate 6 is provided with a glue coating mechanism 7, which includes a first electric slide rail 71 arranged inside the movable plate 6, and a glue storage box 72 is slidably arranged on the bottom surface of the first electric slide rail 71, and a fixed cylinder 73 is arranged on the bottom surface of the glue storage box 72, and both sides of the bottom surface of the glue storage box 72 are connected with L-shaped discharge pipes 79, and a solenoid valve is fixedly arranged inside the L-shaped discharge pipe 79, and two L-shaped discharge pipes 79 are provided, and one end of the two L-shaped discharge pipes 79 is connected to the surface of the fixed cylinder 73, and a coating roller 74 is rotatably arranged on the surface of the fixed cylinder 73, and a plurality of leakage holes 75 are opened on the surface of the coating roller 74, and through holes 76 are opened on both sides of the fixed cylinder 73 located inside the coating roller 74, and a first double-rod hydraulic cylinder 77 is fixedly arranged inside the fixed cylinder 73 through a partition, and the two protruding ends of the first double-rod hydraulic cylinder 77 are fixedly provided with extrusion plates 78;

[0033] When the PCB board with the laser-engraved QR code is transferred to the bottom surface of the protection frame 5, the protection frame 5 is controlled to move by the longitudinal electric slide rail 3 and the transverse electric slide rail 4 until the protection frame 5 contacts the surface of the PCB and covers the surface of the QR code, and then the first electric push rod 10 is started, so that the extended end of the first electric push rod 10 drives the U-shaped plate 11 to descend, and the U-shaped plate 11 drives the movable plate 6 to descend synchronously, and the clamping spring 13 is compressed at this time until the top surface of the coating roller 74 contacts the QR code;

[0034] At this time, the first double-rod hydraulic cylinder 77 is started, so that the two protruding ends of the first double-rod hydraulic cylinder 77 drive the two extrusion plates 78 to move away from each other, and the three-proof glue inside the glue storage box 72 can be discharged to the surface of the coating roller 74 through the through hole 76 and the leakage hole 75, and the first electric slide rail 71 is started, so that the first electric slide rail 71 drives the glue storage box 72 to move. During the movement of the glue storage box 72, the coating roller 74 can roll along the surface of the QR code, so that the three-proof glue can be evenly applied to the surface of the QR code to play a protective role. After the coating is completed, the coating roller 74 is controlled to rise to the initial position inside the protection frame 5.

[0035] Embodiment 2

[0036] Based on Example 1, please refer to Figure 5 The specific improvements are as follows:

[0037] The surface of the L-shaped discharge pipe 79 is provided with a sealing member 8, and the sealing member 8 includes a mounting plate 81 fixedly arranged on the surface of the L-shaped discharge pipe 79, and sealing covers 82 are movably arranged on the surface of the L-shaped discharge pipe 79 at both ends of the fixed cylinder 73, and an annular electromagnet 83 and an annular iron block 84 are fixedly arranged between the mounting plate 81 and the opposite side of the sealing cover 82, and the annular electromagnet 83 and the annular iron block 84 are both sleeved on the surface of the L-shaped discharge pipe 79, and the top surface and the bottom of one side of the mounting plate 81 are fixedly connected to one side of the sealing cover 82 through a buffer spring 85;

[0038] During the application of the three-proof glue, the annular electromagnet 83 is started, so that the annular electromagnet 83 is energized to generate magnetism, thereby adsorbing the annular iron block 84. At this time, the sealing cover 82 is moved toward the mounting plate 81 by the adsorption force until the annular iron block 84 contacts the annular electromagnet 83. At this time, the through hole 76 is in an open state. Conversely, after the three-proof glue is applied, the annular electromagnet 83 can be controlled to be powered off. At this time, the annular iron block 84 loses its adsorption force, and under the action of the buffer spring 85, the sealing cover 82 is driven to cover the through hole 76 on the fixed cylinder 73, so that the through hole 76 can be closed to avoid the waste caused by the overflow of the three-proof glue and the problem of difficulty in cleaning.

[0039] Embodiment 3

[0040] Based on Example 2, please refer to Figure 1 and Figure 3 The specific improvements are as follows:

[0041] A closing plate 14 is slidably provided on both sides of the protection frame 5, a second electric push rod 16 is rotatably provided on the surface of the L-shaped plate 12 through a connecting shaft, and the extended end of the second electric push rod 16 is rotatably connected to one side of the closing plate 14, and an electric heating tube 17 is provided on the bottom surface of the closing plate 14;

[0042] When the two-dimensional code needs to be coated with glue for protection, the second electric push rod 16 is started to extend the extended end of the second electric push rod 16, and the closing plate 14 can be moved along the protection frame 5 with its rotation setting, so that the two closing plates 14 are separated from each other, and the coating roller 74 can move downward for subsequent coating processing;

[0043] On the contrary, after the coating is completed, the extended end of the second electric push rod 16 is retracted, so that the two closing plates 14 are controlled to be relatively close to each other so as to seal the bottom of the protective frame 5, which can protect the coating roller 74 and reduce pollution. At the same time, the electric heating tube 17 is started to heat the electric heating tube 17 to the set temperature, which can dry the QR code after the three-proof glue is applied, thereby accelerating the curing of the three-proof glue.

[0044] Embodiment 4

[0045] Based on Example 3, please refer to Figure 1 , Figure 2 as well as Figure 4 The specific improvements are as follows:

[0046] The top surface of the operating table 1 is provided with a mounting table 15 which can be slid left and right by a second electric slide rail 19, and a clamping and flipping mechanism 9 is provided on the top surface of the mounting table 15, and the clamping and flipping mechanism 9 includes support plates which are slidably arranged on both sides of the top surface of the mounting table 15 by a third electric slide rail 18, and a fixed frame 91 is rotatably provided on the opposite sides of the two support plates, a first motor 910 is fixedly provided inside the support plate, and the output end of the first motor 910 is fixedly connected to one side of the fixed frame 91 through a coupling, a second double-rod hydraulic cylinder 92 is rotatably provided inside the fixed frame 91, a second motor is fixedly provided inside the fixed frame 91, and the output end of the second motor 97 is fixedly connected to the output end of the second motor 97. A driving gear 98 is fixedly provided through a coupling, a passive gear 99 meshing with the driving gear 98 is fixedly provided on the surface of the second double-rod hydraulic cylinder 92, a gear 95 is fixedly provided at both protruding ends of the second double-rod hydraulic cylinder 92, the surface of the gear 95 is rotatably connected to the surface of the clamping plate 93 through a connecting column, a clamping plate 93 is provided on the front and back of the fixed frame 91, and limiting plates 94 are slidably provided on both sides of the inside of the clamping plate 93, teeth meshing with the gear 95 are fixedly provided at the middle of the opposite sides of the upper and lower limiting plates 94, and two pressing pads 96 are provided on the surface of the limiting plate 94, and the two pressing pads 96 are respectively provided in front and behind the teeth;

[0047] The PCB board to be laser-engraved with a two-dimensional code is placed between the clamping plates 93 on both sides, so that the clamping plates 93 are clamped on the side walls of the PCB board. At this time, the PCB board is clamped between the pressing pads 96 on the upper and lower limit plates 94. The second double-rod hydraulic cylinder 92 is started, so that the two protruding ends of the second double-rod hydraulic cylinder 92 can drive the gear 95 to move, so that the two gears 95 are separated from each other, and the setting of the connecting column is coordinated, so that the clamping plate 93 can be driven to move, which is used to adjust the distance between the front and rear clamping plates 93 according to the size of the PCB board, so that it can be stably clamped on the surface of the PCB board, and then the laser engraving part 2 is used to perform the laser engraving operation on the top surface of the PCB. This part is the prior art and is not described in detail in this application document;

[0048] When the single-sided laser engraving operation of the PCB board is completed, the second motor 97 is started, so that the second motor 97 drives the second double-rod hydraulic cylinder 92 to rotate through the active gear 98 and the passive gear 99, and the gear 95 rotates synchronously along the surface of the connecting column. The gear 95 is controlled to rotate so that the upper limit plate 94 in the clamping plate 93 extends toward the PCB, and the lower limit plate 94 retracts in the direction away from the PCB board. At the same time, the first motor 910 is started, so that the first motor 910 drives the fixed frame 91 to rotate, and the PCB board rotates synchronously, thereby controlling it to flip. At this time, the originally extended limit plate 94 is located below the PCB board to play a supporting role, and the originally retracted limit plate 94 will not block the laser engraving operation of the PCB board, and the laser engraving operation can be performed on the other side of the PCB board.

[0049] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser engraving device with a protective two-dimensional code, comprising an operating table (1) and a laser engraving piece (2) fixedly arranged on one side of the back of the operating table (1), characterized in that: A longitudinal electric slide rail (3) is fixedly arranged on one side of the front and back of the operating table (1), and a transverse electric slide rail (4) is slidably arranged between the two longitudinal electric slide rails (3), a protective frame (5) is arranged on the bottom surface of the transverse electric slide rail (4), and a movable plate (6) is arranged inside the protective frame (5), and a gluing mechanism (7) is arranged on the surface of the movable plate (6); The glue coating mechanism (7) comprises a first electric slide rail (71) arranged inside the movable plate (6), and a glue storage box (72) is slidably arranged on the bottom surface of the first electric slide rail (71), a fixed cylinder (73) is arranged on the bottom surface of the glue storage box (72), and a coating roller (74) is rotatably arranged on the surface of the fixed cylinder (73), a surface of the coating roller (74) is provided with a plurality of leakage holes (75), through holes (76) are arranged on both sides of the fixed cylinder (73) located inside the coating roller (74), a first double-rod hydraulic cylinder (77) is fixedly arranged inside the fixed cylinder (73) through a partition, and extrusion plates (78) are fixedly arranged on both protruding ends of the first double-rod hydraulic cylinder (77).

2. A laser engraving device with protective two-dimensional code according to claim 1, characterized in that: Both sides of the bottom surface of the glue storage box (72) are connected with L-shaped discharge pipes (79), two L-shaped discharge pipes (79) are provided, and one end of the two L-shaped discharge pipes (79) is connected to the surface of the fixed cylinder (73).

3. A laser engraving device with protective two-dimensional code according to claim 2, characterized in that: The surface of the L-shaped discharge pipe (79) is provided with a sealing member (8), and the sealing member (8) includes a mounting plate (81) fixedly arranged on the surface of the L-shaped discharge pipe (79), sealing covers (82) are movably arranged at both ends of the fixed cylinder (73) and located on the surface of the L-shaped discharge pipe (79), and an annular electromagnet (83) and an annular iron block (84) are fixedly arranged between the mounting plate (81) and the sealing cover (82) on opposite sides, and the annular electromagnet (83) and the annular iron block (84) are both sleeved on the surface of the L-shaped discharge pipe (79), and the top surface and the bottom of one side of the mounting plate (81) are fixedly connected to one side of the sealing cover (82) through a buffer spring (85).

4. The laser engraving device with protective two-dimensional code according to claim 1, characterized in that: A first electric push rod (10) is fixedly arranged on the bottom surface of the transverse electric slide rail (4), and the protruding end of the first electric push rod (10) is fixedly connected to the top of the movable plate (6) through a U-shaped plate (11), and both sides of the top surface of the protection frame (5) are slidably connected to the surface of the U-shaped plate (11) through an L-shaped plate (12), and both sides of the U-shaped plate (11) are provided with a through groove that is compatible with the L-shaped plate (12), and the top of the inner wall of the through groove is fixedly connected to the top surface of the L-shaped plate (12) through a clamping spring (13).

5. The laser engraving device with protective two-dimensional code according to claim 4, characterized in that: A closing plate (14) is slidably provided on both sides of the interior of the protective frame (5), a second electric push rod (16) is rotatably provided on the surface of the L-shaped plate (12) via a connecting shaft, and the protruding end of the second electric push rod (16) is rotatably connected to one side of the closing plate (14), and an electric heating tube (17) is provided on the bottom surface of the closing plate (14).

6. The laser engraving device with protective two-dimensional code according to claim 1, characterized in that: A mounting platform (15) is slidably arranged on the top surface of the operating table (1) to the left and right, and a clamping and flipping mechanism (9) is arranged on the top surface of the mounting platform (15), the clamping and flipping mechanism (9) comprising support plates slidably arranged on both sides of the top surface of the mounting platform (15) to the front and back, and a fixing frame (91) is rotatably arranged on opposite sides of the two support plates, a second double-rod hydraulic cylinder (92) is rotatably arranged inside the fixing frame (91), and gears (95) are fixedly arranged on both protruding ends of the second double-rod hydraulic cylinder (92), a clamping plate (93) is arranged on the front and back sides of the fixing frame (91), and limit plates (94) are slidably arranged on both sides of the inside of the clamping plate (93), and teeth meshing with the gears (95) are fixedly arranged in the middle of the opposite sides of the upper and lower limit plates (94).

7. A laser engraving device with a protective two-dimensional code according to claim 6, characterized in that: Two pressing pads (96) are arranged on the surface of the limiting plate (94), and the two pressing pads (96) are arranged in front of and behind the teeth respectively.

8. The laser engraving device with protective two-dimensional code according to claim 7, characterized in that: A first motor (910) is fixedly arranged inside the support plate, and an output end of the first motor (910) is fixedly connected to one side of a fixed frame (91) via a coupling; a second motor (97) is fixedly arranged inside the fixed frame (91), and a driving gear (98) is fixedly arranged at the output end of the second motor (97) via a coupling; a driven gear (99) meshing with the driving gear (98) is fixedly arranged on the surface of the second double-rod hydraulic cylinder (92).

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