A laser etching positioning anti-deviation protection mechanism

Abstract

The utility model discloses a kind of laser etching positioning anti-deviation protection mechanism, including fixed mounting plate, further including detachably installed on fixed mounting plate connecting mounting plate, PCB plate installed on fixed mounting plate, magnetic attraction component installed between fixed mounting plate and connecting mounting plate. Through wire installation column and insert fixed mounting plate, combined with four guide holes of symmetry, form stable reference, avoid the reference displacement of ordinary light hole and rigid pin structure, prevent two-dimensional code deviation from exceeding qualified range, reduce batch deviation fluctuation, multiple components cooperate to omit the step of manual repeated adjustment PCB position, improve feeding efficiency, also avoid the angle deviation accumulation when mechanical arm automatic feeding, guarantee repeat positioning accuracy, fixed bolt and hexagon nut adjustment make component close contact, offset positioning error caused by temperature change, also avoid PCB edge burr false positioning, simultaneously prevent PCB sliding in high-frequency start-stop scene, greatly reduce rework rate, satisfy production demand.

Description

Technical Field

[0001] This utility model relates to the field of laser engraving positioning technology, specifically a laser engraving positioning anti-offset protection mechanism. Background Technology

[0002] Laser engraving positioning refers to the process of determining the precise position of the object to be processed through a specific mechanism or method before laser engraving, and fixing it to ensure that the laser beam can accurately act on the preset area. The laser engraving positioning anti-offset protection mechanism is a device used on laser engraving machines to ensure that the position of the object is fixed during the laser engraving process, prevent offset, and thus ensure the accuracy and quality of laser engraving.

[0003] In existing technologies, the offset problem caused by insufficient positioning accuracy in the mass production of PCB laser-engraved QR codes exhibits multi-dimensional characteristics. From a visual perspective, QR codes often show three typical forms: edge misalignment, overall offset, and tilted posture. More insidiously, while partial offset may not completely render the QR code invalid, standard testing reveals potential problems. After high-temperature reflow soldering, the pattern deforms, causing complete loss of recognizability. If the positioning flexibility is insufficient and the fixed point position cannot be finely adjusted via a slide rail, it is difficult to accurately adapt to positioning requirements when dealing with PCBs of different sizes and specifications. The only option is to rely on an overall adjustment mechanism, which is not only cumbersome but also prone to introducing new positioning deviations due to excessive adjustment. If initial PCB placement deviations or slight deformation of the mechanism occur during production, without a slide rail to adjust the fixed point to correct the local position, the deviation must be accepted as persistent, leading to a decrease in the positioning accuracy of the QR code laser engraving and a significant increase in the probability of exceeding the acceptable range. Utility Model Content

[0004] The purpose of this utility model is to provide a laser engraving positioning anti-offset protection mechanism to solve the problem mentioned in the background art, which is that the laser engraving positioning anti-offset protection mechanism with insufficient positioning accuracy causes the offset problem to exhibit multi-dimensional characteristics, and the fixed point leads to a decrease in the laser engraving position accuracy of the QR code, which greatly increases the probability of exceeding the qualified range.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a laser-engraved positioning anti-offset protection mechanism, including a fixed mounting plate, a connecting mounting plate detachably mounted on the fixed mounting plate, a PCB board mounted on the fixed mounting plate, a magnetic suction component mounted between the fixed mounting plate and the connecting mounting plate, a fixing component mounted on the fixed mounting plate, a guide hole opened inside the fixed mounting plate, a wire mounting post fixedly connected to the connecting mounting plate, a fixing bolt threadedly connected inside the sliding moving block, and a hexagonal nut fixedly connected inside the fixing bolt. When the hexagonal nut rotates clockwise, the fixing bolt can drive the hexagonal nut to contact the support surface of the guide hole.

[0006] In a preferred embodiment of this technical solution, the PCB board has through holes at the corresponding positions of the wire mounting posts, and the wire mounting posts pass through the PCB board and are inserted into the fixing mounting plate.

[0007] In the preferred embodiment of this technical solution, four guide holes are provided, and the four guide holes are symmetrically provided at both ends of the fixed mounting plate.

[0008] According to the preferred embodiment of this technical solution, the magnetic suction assembly includes a wire mounting plate fixedly connected to the connecting mounting plate, a second magnetic block installed inside the wire mounting plate, a first magnetic block fixedly connected to the bottom of the fixed mounting plate, and a baffle fixedly connected to one side of the wire mounting plate. The first magnetic block moves along a preset direction of the slot inside the wire mounting plate.

[0009] Based on the preferred embodiment of this technical solution, the wire mounting plate has a slot at the corresponding position of the first magnetic block, and the first magnetic block is engaged inside the slot of the wire mounting plate.

[0010] In the preferred embodiment of this technical solution, the second magnetic block is trapezoidal and elongated, and the trapezoidal and elongated shape of the second magnetic block provides a gap for the contact between the first magnetic block and the second magnetic block.

[0011] According to the preferred embodiment of this technical solution, the fixing component includes a sliding mounting seat fixedly connected to the bottom of the fixing mounting plate, a sliding moving block slidably connected inside the sliding mounting seat, a fixing mounting post fixedly connected to the sliding moving block, a threaded mounting post threadedly connected inside the fixing mounting post, and a fixing compression pad fixedly connected to the fixing mounting post. The fixing compression pad is pulled by hand to make the sliding moving block move along a preset direction inside the sliding mounting seat.

[0012] In the preferred embodiment of this technical solution, two sliding blocks are provided, and the two sliding blocks are symmetrically slidably connected inside the sliding mounting base.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By inserting wire mounting posts through the PCB board through-holes and fixing the mounting plate, combined with four symmetrical guide holes, a stable reference is formed. This avoids the reference displacement of ordinary optical holes and rigid pin structures, prevents QR code offset from exceeding the qualified range, reduces batch deviation fluctuations, and eliminates the need for manual repeated PCB position adjustments through multi-component collaboration. This improves material loading efficiency and avoids the accumulation of angular deviations during automatic material loading by the robotic arm, ensuring repeatability and positioning accuracy. The fixing bolts and hexagonal nuts ensure tight contact between components, offsetting positioning errors caused by temperature changes and preventing false positioning due to PCB edge burrs. It also prevents PCB slippage in high-frequency start-stop scenarios, significantly reducing rework rates and meeting production requirements.

[0015] 2. The wire mounting plate slot engages with the first magnetic block, and together with the magnetic force of the second magnetic block, forms a stable reference. This avoids the reference displacement of ordinary optical holes and rigid pin structures, preventing QR code offset from exceeding the acceptable range and reducing deviation fluctuations between different batches. During manual loading, the magnetic component can correct the initial placement deviation of the PCB through adsorption, eliminating the need for repeated position adjustments, improving efficiency and reducing hidden deviations. During automatic loading, it can buffer the angular deviation of the robotic arm, preventing deviation accumulation and ensuring repeatability and positioning accuracy. Simultaneously, the flexibility of the magnetic attraction can offset the impact of temperature changes on positioning, preventing false positioning caused by PCB edge burrs, and the baffle restricts lateral displacement, preventing PCB slippage in high-frequency start-stop scenarios, significantly reducing rework rates and meeting production requirements.

[0016] 3. The sliding engagement between the sliding mounting base and the sliding moving block allows for direct manual adjustment of the fixed point without relying on the overall adjustment mechanism. This simplifies operation and avoids introducing new deviations due to excessive adjustment. When dealing with PCBs of different sizes and specifications, the sliding moving block moves along the preset direction of the sliding mounting base, flexibly adapting to different positioning requirements without frequent mechanism modifications. If initial PCB placement deviations or slight deformations of the mechanism occur during production, the position of the fixed compression pad can be finely adjusted using the sliding moving block to correct local deviations and prevent them from persisting. Simultaneously, the threaded mounting post allows for further fine-tuning of the clamping force. Combined with the balanced constraint of the two symmetrical sliding moving blocks, this ensures positioning stability and significantly reduces the probability of decreased accuracy or exceeding acceptable limits in QR code laser engraving, meeting diverse production needs. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of one embodiment of the laser engraving positioning anti-deviation protection mechanism of this utility model;

[0018] Figure 2 This is a schematic diagram of the connecting mounting plate structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the conductor mounting post structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the fixing component structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the guide component structure of this utility model.

[0022] In the diagram: 1. Fixed mounting plate; 2. Connecting mounting plate; 3. PCB board; 701. Guide hole; 702. Wire mounting post; 703. Fixing bolt; 704. Hex nut; 801. Wire mounting plate; 802. First magnetic block; 803. Second magnetic block; 804. Baffle; 901. Sliding mounting base; 902. Sliding moving block; 903. Fixed mounting post; 904. Threaded mounting post; 905. Fixed compression pad. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides an embodiment of a laser engraving positioning anti-offset protection mechanism: it includes a fixed mounting plate 1, a connecting mounting plate 2 detachably mounted on the fixed mounting plate 1, a PCB board 3 mounted on the fixed mounting plate 1, a magnetic suction assembly mounted between the fixed mounting plate 1 and the connecting mounting plate 2, a fixing assembly mounted on the fixed mounting plate 1, a guide hole 701 opened inside the fixed mounting plate 1, a wire mounting post 702 fixedly connected to the connecting mounting plate 2, a fixing bolt 703 threadedly connected inside the sliding moving block 902, and a hexagonal nut 704 fixedly connected inside the fixing bolt 703. When the hexagonal nut 704 rotates clockwise, the fixing bolt 703 can drive the hexagonal nut 704 to contact the support surface of the guide hole 701. By detachably mounting the connecting mounting plate 2 onto the fixed mounting plate 1, and in conjunction with the guide hole 701, wire mounting post 702, fixing bolt 703, and hexagonal nut 704, the components can be quickly assembled and disassembled. Furthermore, by adjusting the fixing bolt 703 and hexagonal nut 704, the components can be made to have close contact with the support surface of the guide hole 701, thereby forming a multi-dimensional positioning constraint. This effectively counteracts the vibration or external impact generated during laser engraving, prevents the overall position of the components from shifting, and provides a stable reference for the laser engraving of the PCB board 3.

[0025] Please see Figure 3A further solution based on this embodiment is as follows: PCB board 3 has through holes at corresponding positions of wire mounting posts 702, and wire mounting posts 702 pass through PCB board 3 and are inserted into fixed mounting plate 1. By allowing wire mounting posts 702 to pass through the through holes of PCB board 3 and be inserted into fixed mounting plate 1, wire mounting posts 702 simultaneously position PCB board 3 and connecting mounting plate 2, ensuring that the installation position of PCB board 3 on fixed mounting plate 1 is accurate, and also enhancing the structural stability of PCB board 3 through the support of wire mounting posts 702, preventing warping or displacement due to local stress during laser engraving, and ensuring the consistency between the laser engraved pattern and the preset position of PCB board 3.

[0026] Please see Figure 3 A further solution based on this embodiment is as follows: four guide holes 701 are provided, and the four guide holes 701 are symmetrically provided at both ends of the fixed mounting plate 1. By symmetrically providing four guide holes 701 on the fixed mounting plate 1, a uniformly distributed guiding reference is provided for the installation of related components, so that the components can move smoothly along the preset trajectory during assembly or adjustment, avoiding tilting or offset caused by insufficient guidance on one side. At the same time, the four symmetrically distributed guide holes 701 can distribute the force on the mechanism, enhance the load-bearing capacity of the overall structure, reduce deformation after long-term use, and maintain the stability of positioning accuracy.

[0027] Please see Figure 5 A further embodiment of this solution is as follows: the magnetic suction assembly includes a wire mounting plate 801 fixedly connected to the connecting mounting plate 2, a second magnetic block 803 installed inside the wire mounting plate 801, a first magnetic block 802 fixedly connected to the bottom of the fixed mounting plate 1, and a baffle 804 fixedly connected to one side of the wire mounting plate 801. The first magnetic block 802 moves along a preset direction of the slot inside the wire mounting plate 801. The magnetic suction assembly, composed of the wire mounting plate 801, the first magnetic block 802, the second magnetic block 803, and the baffle 804, utilizes magnetic attraction to achieve rapid docking between the fixed mounting plate 1 and the connecting mounting plate 2. Simultaneously, the directional movement of the first magnetic block 802 along the slot and the limiting effect of the baffle 804 ensure accurate relative positioning of the components during the magnetic suction process. This simplifies assembly operations and prevents separation or displacement of components due to vibration during laser engraving through continuous magnetic attraction, thus improving the overall stability of the mechanism.

[0028] Please see Figure 5A further solution based on this embodiment is as follows: the wire mounting plate 801 has a slot at the corresponding position of the first magnetic block 802, and the first magnetic block 802 is engaged inside the slot of the wire mounting plate 801. Through the engagement of the slot of the wire mounting plate 801 with the first magnetic block 802, precise installation guidance and circumferential constraint are provided for the first magnetic block 802, ensuring that the adsorption surfaces of the first magnetic block 802 and the second magnetic block 803 are completely aligned, avoiding uneven force due to magnetic position deviation. At the same time, the slot structure enhances the connection strength between the two, preventing the first magnetic block 802 from sliding laterally when subjected to external force, further improving the positioning reliability of the magnetic assembly.

[0029] Please see Figure 5 A further solution based on this embodiment is as follows: the second magnetic block 803 is trapezoidal and elongated, providing a gap for the contact between the first magnetic block 802 and the second magnetic block 803. By designing the second magnetic block 803 as a trapezoidal and elongated shape, its inclined side can guide the first magnetic block 802 to automatically correct its position during the adsorption process, achieving precise docking. At the same time, the reserved contact gap can avoid component damage caused by direct rigid collision between the two, and can also reduce the impact of the instantaneous magnetic attraction on the overall mechanism, thus extending the service life of the components while ensuring the magnetic positioning accuracy.

[0030] Please see Figure 4 A further solution based on this embodiment is as follows: the fixing component includes a sliding mounting base 901 fixedly connected to the bottom of the fixed mounting plate 1, a sliding moving block 902 slidably connected inside the sliding mounting base 901, a fixed mounting post 903 fixedly connected to the sliding moving block 902, a threaded mounting post 904 threadedly connected inside the fixed mounting post 903, and a fixed compression pad 905 fixedly connected to the fixed mounting post 903. The fixed compression pad 905 can be pulled by hand to make the sliding moving block 902 move along a preset direction inside the sliding mounting base 901. The fixing assembly, consisting of a sliding mounting base 901, a sliding moving block 902, a fixed mounting post 903, a threaded mounting post 904, and a fixed compression pad 905, allows the position of the fixed compression pad 905 to be adjusted by manually pulling the sliding moving block 902. Combined with the fine-tuning function of the threaded mounting post 904, it can adapt to objects of different sizes to be laser-engraved, achieving tight clamping. The fixed compression pad 905 can buffer the clamping force to avoid damaging the surface of the object. At the same time, the stable clamping action can prevent any form of displacement of the object during the laser engraving process, ensuring the accuracy of the processing position.

[0031] Please see Figure 4A further solution based on this embodiment is as follows: two sliding moving blocks 902 are provided, and the two sliding moving blocks 902 are symmetrically slidably connected inside the sliding mounting base 901. By symmetrically arranging two sliding moving blocks 902 inside the sliding mounting base 901, a balanced clamping force can be applied from both sides of the object to be laser-engraved, so that the object is symmetrically constrained in the horizontal direction, avoiding tilting or displacement of the object due to force on one side. At the same time, the symmetrical structure can make the clamping force distribution more uniform, reduce the risk of local deformation of the object, ensure that the object maintains a stable posture during the laser engraving process, and further improve the processing accuracy.

[0032] The existing "ball bearing slide rail assembly" can be used instead, with the ball bearing slide rail replacing the sliding mounting base 901 and the slider adapted to the ball bearing slide rail replacing the sliding moving block 902. The advantage is that the rolling friction coefficient of the ball bearing slide rail is much smaller than that of the traditional sliding fit, making it easier to pull manually and reducing wear after long-term use. It can maintain more stable sliding accuracy, and the fixed point can be precisely adjusted through the scale markings on the slide rail, further reducing adjustment errors.

[0033] The existing "silicone anti-slip pad" or "polyurethane elastic pad" can be used instead. The original fixing compression pad 905 can be replaced by an anti-slip pad made of silicone or an elastic pad made of polyurethane. The advantage is that silicone and polyurethane materials have a higher coefficient of friction, which can enhance the clamping stability of the PCB and prevent the PCB from sliding in high-frequency start-stop scenarios. At the same time, the elastic material can better adapt to the slight unevenness of the PCB edge, reduce false positioning caused by burrs on the PCB edge, and cause less compression damage to the PCB surface, thus protecting the PCB appearance.

[0034] Working principle: Basic positioning is achieved through the cooperation of the fixed mounting plate 1 and the connecting mounting plate 2: The connecting mounting plate 2 is inserted into the guide hole 701 of the fixed mounting plate 1 through the wire mounting post 702, forming a preliminary spatial positioning. The four symmetrically distributed guide holes 701 ensure the relative positional accuracy of the two and avoid misalignment during assembly. Secondly, the magnetic attraction component enhances the connection stability: The first magnetic attraction block 802 at the bottom of the fixed mounting plate 1 slides along the slot of the wire mounting plate 801 and is magnetically attracted to the second magnetic attraction block 803 inside. The trapezoidal structure of the second magnetic attraction block 803 guides the first... The magnetic block 802 automatically corrects its position, while the baffle 804 restricts lateral displacement, forming a bidirectional constraint. Furthermore, the PCB board 3 is positioned by the wire mounting post 702 passing through the through hole. The clearance between the post and the hole eliminates assembly errors, while the support surface of the fixed mounting plate 1 ensures flatness. Finally, the fixing assembly is manually adjusted to clamp the object: the sliding block 902 slides along the sliding mounting base 901, causing the fixed compression pad 905 to approach the object; the threaded mounting post 904 allows for fine-tuning of the clamping force; and the two symmetrical sliding blocks 902 form a balanced constraint force. The fixing bolt 703 and the hexagonal nut 704 are locked together by threads, completely fixing the relative positions of each component to form a rigid whole, ensuring no displacement during laser engraving.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser-engraved positioning anti-deviation protection mechanism, comprising a fixed mounting plate (1), characterized in that: It also includes a connecting mounting plate (2) that can be detachably mounted on a fixed mounting plate (1), a PCB board (3) mounted on a fixed mounting plate (1), a magnetic suction assembly mounted between the fixed mounting plate (1) and the connecting mounting plate (2), a fixing assembly mounted on the fixed mounting plate (1), a guide hole (701) opened inside the fixed mounting plate (1), a wire mounting post (702) fixedly connected to the connecting mounting plate (2), a fixing bolt (703) threadedly connected inside the sliding moving block (902), and a hexagonal nut (704) fixedly connected inside the fixing bolt (703). When the hexagonal nut (704) rotates clockwise, the fixing bolt (703) can drive the hexagonal nut (704) to contact the support surface of the guide hole (701).

2. The laser engraving positioning anti-deviation protection mechanism according to claim 1, characterized in that: The PCB board (3) has through holes at the corresponding positions of the wire mounting posts (702), and the wire mounting posts (702) pass through the PCB board (3) and are inserted into the fixing mounting plate (1).

3. The laser engraving positioning anti-deviation protection mechanism according to claim 1, characterized in that: Four guide holes (701) are provided, and the four guide holes (701) are symmetrically provided at both ends of the fixed mounting plate (1).

4. The laser engraving positioning anti-deviation protection mechanism according to claim 1, characterized in that: The magnetic assembly includes a wire mounting plate (801) fixedly connected to the connecting mounting plate (2), a second magnetic block (803) installed inside the wire mounting plate (801), a first magnetic block (802) fixedly connected to the bottom of the fixed mounting plate (1), and a baffle (804) fixedly connected to one side of the wire mounting plate (801). The first magnetic block (802) moves along the preset direction of the slot inside the wire mounting plate (801).

5. The laser engraving positioning anti-deviation protection mechanism according to claim 4, characterized in that: The wire mounting plate (801) has a slot at the corresponding position of the first magnetic block (802), and the first magnetic block (802) is engaged inside the slot of the wire mounting plate (801).

6. The laser engraving positioning anti-deviation protection mechanism according to claim 4, characterized in that: The second magnetic block (803) is in the shape of a trapezoidal strip, and the trapezoidal shape of the second magnetic block (803) provides a gap for the contact between the first magnetic block (802) and the second magnetic block (803).

7. The laser engraving positioning anti-deviation protection mechanism according to claim 1, characterized in that: The fixing assembly includes a sliding mounting base (901) fixedly connected to the bottom of the fixed mounting plate (1), a sliding moving block (902) slidably connected inside the sliding mounting base (901), a fixed mounting post (903) fixedly connected to the sliding moving block (902), a threaded mounting post (904) threadedly connected inside the fixed mounting post (903), and a fixed compression pad (905) fixedly connected to the fixed mounting post (903). The fixed compression pad (905) is pulled by hand to move the sliding moving block (902) along a preset direction inside the sliding mounting base (901).

8. The laser engraving positioning anti-deviation protection mechanism according to claim 7, characterized in that: There are two sliding blocks (902), and the two sliding blocks (902) are symmetrically slidably connected inside the sliding mounting base (901).

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