Laser marking machine with positioning mechanism

Abstract

The utility model provides a laser marking machine with a positioning mechanism, which comprises a conveyor belt running circularly, and positioning components are symmetrically mounted on a frame. The positioning assembly comprises a mounting plate fixed to the rack, an annular track sliding groove is formed in the bottom of the mounting plate, a connecting column is slidably connected into the annular track sliding groove, a connecting plate is fixed to one end of the mounting plate and connected with the connecting column through an elastic rope, and a positioning rod is fixedly connected to one side of the connecting column and movably connected with the mounting plate. A first driving strip is arranged on the conveying belt. According to the laser marking machine with the positioning mechanism, the first driving strip is arranged on the conveying belt, the first driving strip can drive the connecting column to slide along the annular track sliding groove, then the positioning rods are driven to move, the two positioning rods on the two sides can extrude and position the light guide plate at the same time, the connecting column is driven to reset in combination with the use of the elastic rope, and the positioning mechanism is fixed. The whole positioning process does not need an additional driving source, the efficiency is high, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the field of laser marking machines, in particular to a laser marking machine with a positioning mechanism. Background Technique

[0002] The light guide plate originates from the deep processing of physical properties. The laser dot light guide plate can efficiently convert a point light source or a line light source into a surface light source of various shapes. Its physical principle is usually to install high-brightness LED lamp beads on the side of a high-permeability acrylic (PMM) plate with a certain thickness. The light of the LED is refracted and propagated inside the acrylic plate at a certain divergence angle. When the light irradiates on the laser dots etched on the back of the acrylic plate with C02 (carbon dioxide) laser, diffuse reflection and refraction will occur.

[0003] In order to accurately mark at a specific position, the existing light guide plate laser marking machine generally positions the light guide plate by manual measurement and positioning before marking, or uses a driving mechanism such as a cylinder to drive a positioning plate to move to position the light guide plate. In this way, the efficiency is low and the cost is high.

[0004] Therefore, it is necessary to provide a laser marking machine with a positioning mechanism to solve the above technical problems. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a laser marking machine with a positioning mechanism.

[0006] A laser marking machine with a positioning mechanism provided by the utility model includes a belt conveyor, and the belt conveyor includes a frame, a driving roller and a driven roller rotatably connected to both ends of the frame. The driving roller and the driven roller are connected by a conveyor belt. A plurality of supporting rollers for supporting the conveyor belt are rotatably connected inside the frame. A motor is fixed on the frame, and an output shaft of the motor is fixedly connected to one end of the driving roller. Positioning components are symmetrically installed on the frame, and a laser marking device is arranged above the belt conveyor;

[0007] The positioning component includes a mounting plate fixed on the frame. An annular track chute is arranged at the bottom of the mounting plate. A connecting column is slidably connected in the annular track chute. A connecting plate is fixed at one end of the mounting plate. The connecting plate is connected to the connecting column by an elastic rope. The elastic rope is used to pull the connecting column to the initial position in the annular track chute. A positioning rod is fixedly connected to one side of the connecting column. The positioning rod is movably connected to the mounting plate. First driving strips for squeezing and driving the connecting column to slide in the annular track chute are equidistantly arranged on both sides of the top of the conveyor belt. During the sliding process of the connecting column in the annular track chute, the positioning rod moves towards the direction close to the light guide plate to squeeze and position the side wall of the light guide plate.

[0008] In the present utility model, the positioning rod includes a first rod section and a second rod section that are detachably connected by bolts.

[0009] In the present utility model, a fixing plate is fixed to the bottom of the mounting plate. A sliding groove is provided inside the fixing plate. The positioning rod is slidably connected to the sliding groove through a slider. The sliding direction of the slider is the same as the conveying direction of the conveyor belt. The positioning rod is slidably connected to the slider, and the sliding direction of the positioning rod relative to the slider is perpendicular to the conveying direction of the conveyor belt.

[0010] Wherein, limiting side plates corresponding to the two side faces of the fixing plate are provided on both sides of the slider. Ball bearings for contacting the inner wall surface of the sliding groove are provided on the slider, and the ball bearings are located between the two limiting side plates.

[0011] In the present utility model, a positioning plate for squeezing and positioning the side wall of the light guide plate is provided at one end of the positioning rod away from the connecting column.

[0012] In the present utility model, the annular track sliding groove includes a first guiding groove, a second guiding groove, a return groove, and a smoothing groove. The return groove and the smoothing groove are both parallel to the conveying direction of the conveyor belt. The smoothing groove is located on the side of the return groove close to the light guide plate. One end of the first guiding groove connects the return groove and the smoothing groove, and the other end of the second guiding groove connects the return groove and the smoothing groove. The first guiding groove is connected to the return groove and the smoothing groove through rounded corner grooves respectively, and the second guiding groove is connected to the return groove and the smoothing groove through rounded corner grooves respectively.

[0013] Further, the first guiding groove is closer to the connecting plate than the second guiding groove. The first guiding groove and the second guiding groove are both inclined with respect to the conveying direction of the conveyor belt. One end of the first guiding groove close to the return groove is closer to the connecting plate than the end away from the return groove, and one end of the second guiding groove close to the return groove is closer to the connecting plate than the end away from the return groove.

[0014] In addition, a limiting convex block is provided at one end of the inner wall of the return groove close to the first guiding groove. The surface of the limiting convex block close to the return groove is an arc convex surface, so that the connecting column slides from the return groove into the first guiding groove along the arc convex surface. A limiting concave portion is provided on the surface of the limiting convex block close to the first guiding groove, and the limiting concave portion is smoothly connected to the inner wall surface of the first guiding groove. When the elastic cord pulls the connecting column to the initial position, the connecting column is located in the limiting concave portion.

[0015] Further, an auxiliary post is provided on the positioning rod, and second driving strips are provided on both sides of the top of the conveyor belt. The second driving strips are used to squeeze and drive the auxiliary post to move synchronously with the connecting post;

[0016] When the connecting post is located in the return groove, the moving trajectories of the connecting post and the first driving strip are misaligned, and the moving trajectories of the auxiliary post and the second driving strip are misaligned;

[0017] When the connecting post is located at the initial position, the connecting post is located on the moving trajectory of the first driving strip, and the auxiliary post is located on the moving trajectory of the second driving strip;

[0018] When the connecting post is located in the smooth groove, the positioning plate at one end of the positioning rod contacts the light guide plate on the conveyor belt.

[0019] In the present utility model, a support frame is fixed on the frame. Lead screws and guide posts are provided on both sides of the support frame. The two guide posts are located on both sides of the lead screw. The laser marking device is arranged on the lifting frame. Nut blocks for driving connection with the lead screw and sliding sleeves for sliding connection with the guide posts are provided on both sides of the lifting frame.

[0020] Compared with the prior art, the present utility model has the following beneficial effects: The laser marking machine with a positioning mechanism of the present utility model drives the connecting post to slide along the annular track chute through the first driving strip arranged on the conveyor belt, and then drives the positioning rod to move, so that the two positioning rods on both sides will simultaneously squeeze and position the light guide plate. Combined with the use of the elastic rope, the connecting post is driven to reset. The whole positioning process does not require an additional driving source, and has high efficiency and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the laser marking machine with a positioning mechanism of the present utility model.

[0022] Figure 2 It is a schematic diagram of the structure of the positioning component in the present utility model.

[0023] Figure 3 It is a partial enlarged view of the limiting convex block in the present utility model.

[0024] Figure 4 It is a schematic diagram of the slider structure of the present utility model.

[0025] Numbers in the figure: 1, frame; 2, active roller; 3, driven roller; 4, conveyor belt; 5, motor; 6, mounting plate; 7, annular track slide; 8, connecting column; 9, connecting plate; 10, elastic rope; 11, positioning rod; 111, bolt; 12, first drive bar; 13, second drive bar; 14, laser marking device; 15, fixed plate; 16, slide; 17, slider; 171, limit side plate; 172, ball; 18, positioning plate; 19, auxiliary column; 20, first guide groove; 21, second guide groove; 22, return groove; 23, smooth groove; 24, limit protrusion; 241, limit recess; 25, support frame; 251, lead screw; 252, guide column; 26, lifting frame; 261, nut block; 262, sliding sleeve; 27, support roller; 28, fixed frame; 29, ion blower; A, positioning assembly. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] Directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used for reference to the directions of the drawings. The directional terms used are used to illustrate and understand the present invention, and are not used to limit the present invention.

[0028] The words "first", "second" and the like in the terminology of the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be construed as limiting the order of precedence.

[0029] Please refer to Figure 1 A laser marking machine with a positioning mechanism includes a belt conveyor, which includes a frame 1 and an active roller 2 and a driven roller 3 rotatably connected to both ends of the frame 1. The active roller 2 and the driven roller 3 are connected through a conveyor belt 4. A motor 5 is fixed on the frame 1, and the output shaft of the motor 5 is fixedly connected to one end of the active roller 2. The conveyor belt 4 is driven by the motor 5 to circulate to transport the light guide plate for marking.

[0030] Among them, a plurality of support rollers 27 for supporting the conveyor belt 4 are rotatably connected to the inner side of the frame 1, so as to realize stable transportation of the light guide plate.

[0031] In this embodiment, positioning components A are symmetrically installed on the frame 1, and a laser marking device 14 is arranged above the belt conveyor.

[0032] Please refer to Figure 2 , in this embodiment, the positioning component A includes a mounting plate 6 fixed on the frame 1. A circular track chute 7 is provided at the bottom of the mounting plate 6. A connecting column 8 is slidably connected in the circular track chute 7. One end of the mounting plate 6 is fixed with a connecting plate 9. The connecting plate 9 is connected to the connecting column 8 through an elastic cord 10. The elastic cord 10 is used to pull the connecting column 8 to the initial position in the circular track chute 7. For example, Figure 2 the position where the connecting column 8 is located in

[0033] Please refer to Figure 2 is the initial position. A positioning rod 11 is fixedly connected to one side of the connecting column 8. The positioning rod 11 is movably connected to the mounting plate 6. On both sides of the top of the conveyor belt 4, first driving strips 12 for squeezing and driving the connecting column 8 to slide in the circular track chute 7 are equidistantly arranged. During the sliding process of the connecting column 8 in the circular track chute 7, the positioning rod 11 moves towards the direction close to the light guide plate to squeeze and position the side wall of the light guide plate. The two positioning components A on both sides respectively squeeze the two side surfaces of the light guide plate, thereby realizing positioning. During the entire positioning process, the belt conveyor provides the driving force for the movement and positioning of the positioning rod 11, without the need for an additional driving source, with high efficiency and low cost.

[0034] Please refer to Figure 4 , specifically, a fixing plate 15 is fixed at the bottom of the mounting plate 6. A chute 16 is provided inside the fixing plate 15. The positioning rod 11 is slidably connected to the chute 16 through a slider 17. The sliding direction of the slider 17 is the same as the conveying direction of the conveyor belt 4. The positioning rod 11 is slidably connected to the slider 17. The relative sliding direction of the positioning rod 11 with respect to the slider 17 is perpendicular to the conveying direction of the conveyor belt 4, which makes the movement and positioning process of the positioning rod 11 very stable.

[0034] Please refer to Figure 4 , wherein, limiting side plates 171 corresponding to the two side surfaces of the fixing plate 15 are arranged on both sides of the slider 17, making the sliding fit between the slider 17 and the fixing plate 15 very stable.

[0035] Further, a ball 172 for contacting the inner wall surface of the chute 16 is arranged on the slider 17. The ball 172 is located between the two limiting side plates 171, making the sliding fit between the slider 17 and the fixing plate 15 smoother.

[0036] Please refer to Figure 2 , in this embodiment, a positioning plate 18 for squeezing and positioning the side wall of the light guide plate is provided at the end of the positioning rod 11 far from the connecting column 8. A better surface contact positioning is formed between the positioning plate 18 and the side surface of the light guide plate.

[0037] In this embodiment, the positioning rod 11 includes a first rod section and a second rod section detachably connected by a bolt 111. The connecting column 8 is connected to one end of the first rod section away from the second rod section, and the positioning plate 18 is connected to one end of the second rod section away from the first rod section, facilitating disassembly and assembly, and also facilitating replacement with positioning rods 11 of different lengths to perform extrusion positioning on light guide plates of different size specifications.

[0038] Wherein, a sliding groove and a sliding block can be arranged between the first rod section and the second rod section to form a connection, so that the length after the connection of the first rod section and the second rod section can be adjusted by sliding. At the same time, long slots can be arranged on the first rod section and the second rod section so that the bolt 111 can be used for fixed connection after the length is adjusted.

[0039] In this embodiment, the annular track chute 7 includes a first guide groove 20, a second guide groove 21, a return groove 22, and a smooth groove 23. The return groove 22 and the smooth groove 23 are both parallel to the conveying direction of the conveyor belt 4. The smooth groove 23 is located on the side of the return groove 22 close to the light guide plate. One end of the first guide groove 20 connects the return groove 22 and the smooth groove 23, and the other end of the second guide groove 20 connects the return groove 22 and the smooth groove 23. The first guide groove 20 is connected to the return groove 22 and the smooth groove 23 through fillet grooves, and the second guide groove 21 is connected to the return groove 22 and the smooth groove 23 through fillet grooves. The fillet grooves facilitate the movement of the connecting column 8 in the annular track chute 7 to be more stable and smooth.

[0040] Wherein, the first guide groove 20 is closer to the connecting plate 9 than the second guide groove 21. The first guide groove 20 and the second guide groove 21 are both inclined with respect to the conveying direction of the conveyor belt 4. One end of the first guide groove 20 close to the return groove 22 is closer to the connecting plate 9 than the end away from the return groove 22, and one end of the second guide groove 21 close to the return groove 22 is closer to the connecting plate 9 than the end away from the return groove 22.

[0041] The first driving strip 12 can drive the connecting column 8 to move through the first guide groove 20 and the smooth groove 23, and the pulling force of the elastic rope 10 can drive the connecting column 8 to move through the second guide groove 21 and the return groove 22.

[0042] Please refer to Figure 3, in this embodiment, a limiting bump 24 is provided at one end of the inner wall of the return groove 22 close to the first guiding groove 20. The surface of the limiting bump 24 close to the return groove 22 is an arc convex surface, so that the connecting column 8 can slide from the return groove 22 into the first guiding groove 20 along the arc convex surface. A limiting recess 241 is provided on the surface of the limiting bump 24 close to the first guiding groove 20, and the limiting recess 241 is smoothly connected to the inner wall surface of the first guiding groove 20. When the elastic cord 10 pulls the connecting column 8 to the initial position, the connecting column 8 is located in the limiting recess 241. In this way, when the first driving bar 12 presses the connecting column 8, the connecting column 8 will move along the first guiding groove 20 in the direction of the smoothing groove 23, that is, the positioning rod 11 will move towards the light guide plate at the same time, so as to realize the extrusion positioning of the side wall of the light guide plate.

[0043] Further, an auxiliary column 19 is provided on the positioning rod 11, and second driving bars 13 are provided on both sides of the top of the conveyor belt 4. The second driving bars 13 are used to press and drive the auxiliary column 19 to move synchronously with the connecting column 8, so that the movement of the positioning rod 11 is more stable.

[0044] When the connecting column 8 is located in the return groove 22, the movement tracks of the connecting column 8 and the first driving bar 12 are misaligned, and the movement tracks of the auxiliary column 19 and the second driving bar 13 are misaligned. In this way, after the positioning rod 11 completes the positioning of the light guide plate, the connecting column 8 will slide into the return groove 22 through the second guiding groove 21 and form an avoidance position with the first driving bar 12. The conveyor belt 4 can continue to convey the light guide plate, and the connecting column 8 drives the positioning rod 11 to reset to the initial position for the next positioning operation.

[0045] At the same time, it should be noted that when the connecting column 8 is located in the return groove 22, the auxiliary column 19 is opposite to the gap interval between the first driving bar 12 and the second driving bar 13, that is, the auxiliary column 19 can avoid the first driving bar 12 and the second driving bar 13 and move back to the initial position together with the positioning rod 11.

[0046] When the connecting column 8 is located at the initial position, the connecting column 8 is located on the movement track of the first driving bar 12, and the auxiliary column 19 is located on the movement track of the second driving bar 13.

[0047] When the connecting column 8 is located in the smoothing groove 23, the positioning plate 18 at one end of the positioning rod 11 contacts the light guide plate on the conveyor belt 4, and a positioning operation is performed on the positioning plate 18.

[0048] Please refer to Figure 1 , in this embodiment, a fixed frame 28 is provided on the frame 1, and an ion blower 29 is provided on the fixed frame 28. The ion blower 29 is located at the front end of the conveying direction of the belt conveyor. The ion blower 29 is used to remove dust and static electricity before the light guide plate is marked.

[0049] Please refer toFigure 1 In this embodiment, a support frame 25 is fixed on the frame 1. On both sides of the support frame 25, a lead screw 251 and a guide post 252 are provided. The two guide posts 252 are located on both sides of the lead screw 251. The laser marking device 14 is arranged on the lifting frame 26. On both sides of the lifting frame 26, a nut block 261 for driving connection with the lead screw 251 and a sliding sleeve 262 for sliding connection with the guide post 252 are provided. The lead screw 251 is rotated by a corresponding motor, so as to drive the lifting frame 26 to lift and lower, thereby adjusting the height of the focal point of the laser emitted by the laser marking device 14, so that it can adapt to light guide plates of different thicknesses and light guide plates with laser dots of different size requirements.

[0050] When the laser marking machine with a positioning mechanism of this embodiment is working, the staff places the light guide plate on the conveyor belt 4. At the same time, it should be noted that the middle position close to the side of the light guide plate should correspond to the first driving strip 12 and the second driving strip 13. Before the light guide plate is conveyed to the marking position, the first driving strip 12 presses the connecting column 8, and the second driving strip 13 presses the auxiliary column 19, so that the positioning rod 11 not only moves together with the conveyor belt 4, but also moves in the direction close to the guide plate. When the connecting column 8 moves into the smooth groove 23, the positioning plates 18 of the two positioning assemblies A on both sides will press and position the two side walls of the light guide plate.

[0051] Then, after continuing to move a set stroke, the connecting column 8 will slide into the return groove 22 through the second guide groove 21 and form an avoidance position with the first driving strip 12. The auxiliary column 19 is opposite to the gap interval between the first driving strip 12 and the second driving strip 13. The conveyor belt 4 can continue to convey the light guide plate, and the connecting column 8 drives the positioning rod 11 to reset to the initial position for the next positioning operation.

[0052] Then, (the height position of the laser marking device 14 has been adjusted accordingly according to the specification model of the light guide plate before work) when the light guide plate continues to move to the position where it is sensed by the inductor and stops, at this time, the laser marking device 14 can start the marking operation.

[0053] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A laser marking machine with a positioning mechanism, characterized in that: The belt conveyor comprises a frame (1) and a driving roller (2) and a driven roller (3) rotatably connected to both ends of the frame (1); the driving roller (2) and the driven roller (3) are connected to each other by a conveyor belt (4); a plurality of support rollers (27) for supporting the conveyor belt (4) are rotatably connected to the inner side of the frame (1); a motor (5) is fixed to the frame (1); an output shaft of the motor (5) is fixedly connected to one end of the driving roller (2); a positioning assembly (A) is symmetrically mounted on the frame (1); and a laser marking device (14) is arranged above the belt conveyor; The positioning assembly (A) comprises a mounting plate (6) fixed on the frame (1), a circular track slot (7) being provided at the bottom of the mounting plate (6), a connecting column (8) being slidably connected in the circular track slot (7), a connecting plate (9) being fixed at one end of the mounting plate (6), the connecting plate (9) being connected to the connecting column (8) via an elastic rope (10), the elastic rope (10) being used to pull the connecting column (8) to an initial position in the circular track slot (7), a positioning rod (11) being fixedly connected to one side of the connecting column (8), the positioning rod (11) being movably connected to the mounting plate (6), first driving bars (12) for squeezing and driving the connecting column (8) to slide in the circular track slot (7) being equidistantly provided on both sides of the top of the conveyor belt (4), and when the connecting column (8) slides in the circular track slot (7), the positioning rod (11) moves in a direction close to the light guide plate to squeeze and position the side wall of the light guide plate.

2. A laser marking machine with a positioning mechanism according to claim 1, characterized in that: The positioning rod (11) comprises a first rod section and a second rod section which are detachably connected via a bolt (111).

3. The laser marking machine with a positioning mechanism according to claim 1, characterized in that: A fixing plate (15) is fixed at the bottom of the mounting plate (6), a slide groove (16) is provided in the fixing plate (15), the positioning rod (11) is slidably connected to the slide groove (16) via a slider (17), the sliding direction of the slider (17) is consistent with the conveying direction of the conveyor belt (4), the positioning rod (11) is slidably connected to the slider (17), and the sliding direction of the positioning rod (11) relative to the slider (17) is perpendicular to the conveying direction of the conveyor belt (4).

4. The laser marking machine with a positioning mechanism according to claim 3, characterized in that: The two sides of the slider (17) are provided with limiting side plates (171) corresponding to the two side surfaces of the fixed plate (15); the slider (17) is provided with a ball (172) for contacting the inner wall surface of the slide groove (16); the ball (172) is located between the two limiting side plates (171).

5. The laser marking machine with a positioning mechanism according to claim 1, characterized in that: One end of the positioning rod (11) away from the connecting column (8) is provided with a positioning plate (18) for pressing and positioning the side wall of the light guide plate.

6. The laser marking machine with a positioning mechanism according to claim 1, characterized in that: The annular track slide groove (7) comprises a first guide groove (20), a second guide groove (21), a return groove (22), and a smooth groove (23); the return groove (22) and the smooth groove (23) are both parallel to the conveying direction of the conveyor belt (4); the smooth groove (23) is located on the side of the return groove (22) close to the light guide plate; the first guide groove (20) connects one end of the return groove (22) and the smooth groove (23); the second guide groove (21) connects the other end of the return groove (22) and the smooth groove (23); the first guide groove (20) and the return groove (22) and the smooth groove (23) are connected by a rounded groove; the second guide groove (21) and the return groove (22) and the smooth groove (23) are connected by a rounded groove.

7. The laser marking machine with a positioning mechanism according to claim 6, characterized in that: The first guide groove (20) is closer to the connecting plate (9) than the second guide groove (21); the first guide groove (20) and the second guide groove (21) are both inclined relative to the conveying direction of the conveyor belt (4); an end of the first guide groove (20) close to the return groove (22) is closer to the connecting plate (9) than an end away from the return groove (22); and an end of the second guide groove (21) close to the return groove (22) is closer to the connecting plate (9) than an end away from the return groove (22).

8. The laser marking machine with a positioning mechanism according to claim 6, characterized in that: A limiting protrusion (24) is provided on the inner wall of the return groove (22) at one end close to the first guide groove (20); a side of the limiting protrusion (24) close to the return groove (22) is an arc convex surface, so that the connecting column (8) can slide from the return groove (22) into the first guide groove (20) along the arc convex surface; a limiting recess (241) is provided on a side of the limiting protrusion (24) close to the first guide groove (20); the limiting recess (241) is smoothly connected to the inner wall surface of the first guide groove (20); when the elastic rope (10) pulls the connecting column (8) to the initial position, the connecting column (8) is located in the limiting recess (241).

9. The laser marking machine with a positioning mechanism according to claim 8, characterized in that: An auxiliary column (19) is arranged on the positioning rod (11), and second driving bars (13) are arranged on both sides of the top of the conveyor belt (4), and the second driving bars (13) are used for squeezing and driving the auxiliary column (19) and the connecting column (8) to move synchronously; When the connecting column (8) is located in the return groove (22), the moving track of the connecting column (8) and the first driving bar (12) are misaligned, and the moving track of the auxiliary column (19) and the second driving bar (13) are misaligned; When the connecting column (8) is located at the initial position, the connecting column (8) is located on the moving track of the first driving bar (12), and the auxiliary column (19) is located on the moving track of the second driving bar (13); When the connecting column (8) is located in the smooth groove (23), the positioning plate (18) at one end of the positioning rod (11) contacts the light guide plate on the conveyor belt (4).

10. The laser marking machine with a positioning mechanism according to claim 1, characterized in that: A support frame (25) is fixed on the frame (1), and a lead screw (251) and a guide column (252) are arranged on both sides of the support frame (25), and two guide columns (252) are located on both sides of the lead screw (251). The laser marking device (14) is arranged on a lifting frame (26), and a nut block (261) for transmission connection with the lead screw (251) and a sliding sleeve (262) for sliding connection with the guide column (252) are arranged on both sides of the lifting frame (26).

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