Optical path adjusting module and laser drilling equipment

Abstract

The present disclosure relates to a light path adjusting module and a laser drilling device, comprising a fixed mirror frame, a movable mirror frame and an adjusting screw, the movable mirror frame is connected to the fixed mirror frame in a deflectable manner, the fixed mirror frame is fixedly connected with a threaded support part and an open clamp seat respectively, the threaded support part and the open clamp seat are arranged in an axial direction of the adjusting screw; the adjusting screw has a threaded section and a smooth section arranged coaxially, an elastic pre-tightening member is arranged between the fixed mirror frame and the movable mirror frame to keep the movable mirror frame abutting against an abutting end; the open clamp seat has a clamping hole for the smooth section to pass through, and a seat body opening passing through the clamping hole to the outside of the open clamp seat, locking screws are arranged on both sides of the seat body opening to clamp the smooth section by the narrowing of the seat body opening; through the cooperation of the threaded cooperation and the elastic pre-tightening, the smooth section is clamped at a position independent of the threaded cooperation, the positioning after adjustment is kept, and the light path adjustment accuracy, locking stability and reliability of repeated adjustment are considered.

Description

Technical Field

[0001] This disclosure relates to the field of laser device technology, and more specifically, to an optical path adjustment module and a laser drilling device. Background Technology

[0002] Laser drilling equipment is widely used for micro-hole processing of printed circuit boards, flexible circuit boards, and other precision parts. In such equipment, the laser beam typically needs to be reflected, tuned, and focused before reaching the processing position. The installation angle of the reflecting optical element directly affects the beam's propagation direction and its entry into the subsequent optical system. After equipment assembly, optical element replacement, or maintenance, the position and angle of the relevant optical elements need to be calibrated, and their state must be maintained after calibration to meet the requirements for optical path stability during continuous processing.

[0003] Existing optical path adjustment devices typically utilize mechanical fine-tuning mechanisms to change the tilt angle of reflective optical elements, and then maintain the adjusted position through a fastening mechanism after beam alignment. For example, some devices use a screw feed method to drive the support structure of the optical element, and after the angle adjustment is completed, the movement of the adjustment part is restricted by a fastening nut or lateral clamping member. This type of structure can achieve optical path adjustment and positioning, but in some structures, the fastening action is directly applied to the mating parts that bear the fine adjustment. The additional force or frictional torque generated during the fastening process may change the original force state, causing a small displacement of the adjustment part or a slight deflection of the support structure. Since the angle change of the reflective optical element affects the propagation direction of the emitted beam, this small change, after propagating a certain distance, may manifest as a spot shift at the subsequent optical element, causing the locked optical path to deviate from the calibration state before locking, requiring loosening, adjustment, and tightening again. Therefore, how to reduce the disturbance to the adjusted position during the locking process and ensure that the optical path adjustment result is stably maintained after locking remains a problem that needs to be solved for such devices.

[0004] Therefore, it is necessary to improve the existing technology to solve the technical problem that the optical path adjustment device is easily disturbed during the locking process, causing the optical path to deviate from the calibration state after locking. Summary of the Invention

[0005] The purpose of this disclosure is to provide an optical path adjustment module and a laser drilling device to solve the above-mentioned technical problems.

[0006] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0007] According to one aspect of this disclosure, an optical path adjustment module is provided, including a fixed lens frame, a movable lens frame, and an adjustment screw. The movable lens frame is rotatably connected to the fixed lens frame, and a reflector is mounted on the movable lens frame. A threaded support and an open clamp are fixedly connected to the fixed lens frame, and the threaded support and the open clamp are spaced apart along the axial direction of the adjustment screw. The adjusting screw has a threaded section and a smooth section arranged coaxially. The threaded section is threadedly engaged with the threaded support part. The abutting end of the adjusting screw abuts against the movable frame. An elastic preload is provided between the fixed frame and the movable frame to keep the movable frame abutting against the abutting end. The open clamp has a clamping hole through which the smooth section passes, and a seat opening extending from the clamping hole to the outside of the open clamp. Locking screws are provided on both sides of the seat opening. The locking screws pass through the clamping portion on one side of the seat opening and are threadedly connected to the clamping portion on the other side of the seat opening, so that the inner wall of the clamping hole clamps the smooth section by narrowing the seat opening.

[0008] Optionally, the abutting end, the threaded section, and the smooth section are arranged sequentially in a direction away from the movable mirror frame; The abutting end has an arc-shaped abutting surface that protrudes toward the movable mirror frame, and the outer diameter of the threaded section is smaller than the diameter of the smooth section.

[0009] Optionally, a screw shoulder is formed at the connection between the threaded section and the smooth section, and an adjustment handle is fixedly connected to the end of the smooth section away from the threaded section; The axial length of the smooth section is greater than the sum of the axial length of the clamping hole and the axial adjustment stroke of the adjusting screw relative to the threaded support. When the adjusting screw is at any position within the axial adjustment stroke, the clamping hole is located within the axial range of the smooth section, and axial clearances are respectively provided between the end face of the open clamp facing the screw shaft shoulder and the screw shaft shoulder, and between the end face of the open clamp facing the adjusting handle and the adjusting handle.

[0010] Optionally, the open clamp includes a clamp body and a clamp mounting part connected to the clamp body. The clamping hole and the seat opening are disposed in the clamp body. The clamp mounting part is located on the radial side of the clamping hole and is fixedly connected to the fixed frame. The clamping body forms a first clamping lug and a second clamping lug on both sides of the opening of the clamping body, the first clamping lug is provided with a screw through hole, and the second clamping lug is provided with a locking thread hole opposite to the screw through hole; The locking screw passes through the screw through hole and is threaded into the locking thread hole, and the axis of the locking screw is perpendicular to the axis of the adjusting screw.

[0011] Optionally, the adjusting screw is configured as a first adjusting screw and a second adjusting screw, and the threaded support portion is configured with a first threaded support portion that is threadedly engaged with the first adjusting screw and a second threaded support portion that is threadedly engaged with the second adjusting screw; The open clamp is configured as a first open clamp and a second open clamp, which respectively clamp the smooth section of the first adjusting screw and the smooth section of the second adjusting screw. The movable frame is supported on the fixed frame by a fulcrum. The first adjusting screw and the second adjusting screw respectively abut against two spaced positions of the movable frame. The two spaced positions are not collinear with the fulcrum. The elastic preload is located outside the light-transmitting area of ​​the reflector and is connected between the fixed mirror frame and the movable mirror frame, so that the movable mirror frame is simultaneously kept in contact with the abutting end of the first adjusting screw and the abutting end of the second adjusting screw.

[0012] Optionally, the movable frame is provided with a lens pressing plate, a limiting seating surface, and a lens support portion; The lens clamping plate includes a fixed root and an elastic tongue connected to the fixed root. The fixed root is pressed against the limiting seat surface by a fastening screw, and the free end of the elastic tongue is elastically pressed against the non-light-transmitting edge of the reflector. The lens support portion abuts against the side of the reflector away from the elastic tongue, and the pressing position of the elastic tongue is positioned opposite to that of the reflector along the thickness direction of the reflector.

[0013] Optionally, the optical path adjustment module further includes a mounting base connected to the fixed lens frame, and a stand disposed on the mounting base; The stand is provided with two columns, the upper ends of which are connected to a top horizontal plate. An optical support is provided between the two columns, and the optical support has a light-transmitting hole.

[0014] Optionally, the optical carrier is slidably engaged with the two columns, and the top horizontal plate is provided with a bearing adjustment screw that abuts against the optical carrier; The axis of the load-bearing adjustment screw is parallel to the extension direction of the column, and the abutment position of the load-bearing adjustment screw on the optical support is located outside the load-bearing light-transmitting hole.

[0015] Optionally, the optical path adjustment module also includes a back plate connected to the fixed lens frame, and a first cantilever bracket and a second cantilever bracket are spaced apart on the back plate; The first cantilever bracket and the second cantilever bracket extend to the same side of the back plate and are respectively provided with a first light-transmitting hole and a second light-transmitting hole. The first light-transmitting hole and the second light-transmitting hole are coaxial and spaced apart along a common axis.

[0016] Optionally, a calibration plate is detachably disposed inside the first light-transmitting hole. The calibration plate has a positioning outer periphery that mates with the hole wall of the first light-transmitting hole, and an axial shoulder surface that abuts against the end face of the first cantilever bracket. The positioning periphery forms an anti-rotation fit with the hole wall of the first light-transmitting hole, and the calibration piece is provided with a center mark located on the axis of the first light-transmitting hole.

[0017] Optionally, the optical path adjustment module also includes a back plate, and the fixed lens frame is configured as an upper fixed lens frame and a lower fixed lens frame, the upper fixed lens frame and the lower fixed lens frame being connected to the back plate through an upper protruding lens mount and a lower protruding lens mount, respectively; The upper and lower extendable lens mounts are spaced apart along the height of the back plate and extend to the same side of the back plate. The light-transmitting openings of the upper and lower fixed lens mounts face different directions.

[0018] The present invention also provides a laser drilling device, including the optical path adjustment module as described above.

[0019] As can be seen from the above technical solutions, the exemplary embodiments disclosed herein possess at least the following advantages and positive effects: In some embodiments of the present disclosure, the technical solutions provided are as follows: During adjustment, the locking screw is first loosened to release the clamping of the smooth section of the adjusting screw by the inner wall of the clamping hole of the open clamping seat. Then, the adjusting screw is rotated, and the adjusting screw moves axially through the threaded engagement between the threaded section and the threaded support on the fixed frame. At the same time, the smooth section rotates and moves axially within the clamping hole. The abutting end of the adjusting screw abuts against the movable frame, and with the elastic pre-tightening member between the fixed frame and the movable frame, the movable frame remains in contact with the abutting end and deflects relative to the fixed frame when the abutting end is pushed forward or retracted, thereby changing the orientation of the reflector and realizing optical path adjustment. After adjustment, the clamping seat on the side passing through the opening of the seat body is tightened. A locking screw, partially threaded to the other side of the clamping seat, narrows the opening of the seat body between the through-hole and the outer side of the open clamping seat. The smooth section is clamped by the inner wall of the clamping hole, thereby locking the adjusting screw at a position axially spaced from the threaded support, maintaining the adjustment position of the movable mirror frame and the reflector. This solution achieves continuous adjustment of the reflector's orientation through the synergy of threaded engagement and elastic preload, while maintaining the contact stability between the adjusting screw and the movable mirror frame. By clamping the smooth section at a position independent of the threaded engagement, the positioning is maintained after adjustment, reducing local damage and positional disturbance caused by directly pressing the threaded parts. This is beneficial for balancing the optical path adjustment accuracy, locking stability, and reliability of repeated adjustments.

[0020] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings: Figure 1 This is an overall isometric schematic diagram of the optical path adjustment module in this embodiment.

[0022] Figure 2 This is a frontal view of the optical path adjustment module in this embodiment.

[0023] Figure 3 This is a partial assembly diagram of the optical path adjustment module in this embodiment.

[0024] Figure 4 This is a schematic diagram of the optical carrier installation structure of the optical path adjustment module in this embodiment.

[0025] Figure 5 This is a schematic diagram of the upper fixed lens frame installation structure of the optical path adjustment module in this embodiment.

[0026] Figure 6 This is a schematic diagram of the first cantilever support structure of the optical path adjustment module in this embodiment.

[0027] Figure 7 This is a longitudinal cross-sectional view of the adjustment and locking structure of the optical path adjustment module in this embodiment.

[0028] Figure 8 This is a schematic cross-sectional view of the opening clamp of the optical path adjustment module in this embodiment.

[0029] Figure 9 This is a schematic diagram of the lens frame adjustment structure of the optical path adjustment module in this embodiment.

[0030] Figure 10 This is a cross-sectional schematic diagram of the reflector holding structure of the optical path adjustment module in this embodiment.

[0031] Figure 11 This is a cross-sectional view and end face structure diagram of the calibration piece assembly of the optical path adjustment module in this embodiment.

[0032] Figure 12 This is a partial cross-sectional schematic diagram of the elastic pre-tightening connection structure of the optical path adjustment module in this embodiment.

[0033] Illustrations: 10. Fixed frame; 11. Upper fixed frame; 12. Lower fixed frame; 13. Light-transmitting opening; 20. Movable frame; 21. Limiting seat surface; 22. Lens support; 30. Reflecting mirror; 40. Adjusting screw; 41. Threaded section; 42. Smooth section; 43. Abutting end; 431. Arc abutting surface; 44. Screw shoulder; 45. Adjusting handle; 46. First adjusting screw; 47. Second adjusting screw; 50. Threaded support part; 60. Open clamp; 61. Clamping hole; 62. Seat opening; 63. Clamp body; 64. Clamp mounting part; 65. First clamping lug; 651. Screw through hole; 66. Second clamping lug; 67. First open clamp; 68. Second open clamp; 70. Locking screw; 80. Fulcrum; 90. Lens clamp; 91. Fixing root; 92. Elastic tongue; 93. Fastening screw; 100. Mounting base; 110. Stand; 120. Column; 130. Top horizontal plate; 140. Optical support; 150. Load-bearing adjustment screw; 160. Backplate; 170. First cantilever bracket; 171. First light-transmitting hole; 180. Second cantilever bracket; 181. Second light-transmitting hole; 190. Calibration plate; 191. Positioning outer perimeter; 192. Axial shoulder surface; 193. Center mark; 200. Upper protruding lens mount; 210. Lower protruding lens mount; 220. Elastic preload. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.

[0035] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0036] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0037] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily need to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0038] Example 1: Figure 1 This is an overall isometric schematic diagram of the optical path adjustment module in this embodiment, which shows the overall arrangement of the mounting base, backplate and various optical components.

[0039] Figure 2 This is a front view of the optical path adjustment module in this embodiment, showing the positional distribution of the first cantilever bracket, the second cantilever bracket, and each optical component on the back plate.

[0040] Figure 3 This is a partial assembly diagram of the optical path adjustment module in this embodiment, showing the spatial arrangement of the upper protruding lens mount, the lower protruding lens mount, and adjacent optical components.

[0041] Figure 4This is a schematic diagram of the optical support structure of the optical path adjustment module in this embodiment, showing the assembly relationship of the stand, column, top horizontal plate, optical support and support adjustment screw.

[0042] Figure 5 This is a schematic diagram of the upper fixed lens frame installation structure of the optical path adjustment module in this embodiment, which shows the connection relationship between the upper fixed lens frame, the movable lens frame and the upper protruding lens mount.

[0043] Figure 6 This is a schematic diagram of the first cantilever bracket structure of the optical path adjustment module in this embodiment, showing the extension structure of the first cantilever bracket and the setting position of the first light-transmitting hole.

[0044] Figure 7 This is a longitudinal sectional view of the adjustment and locking structure of the optical path adjustment module in this embodiment, showing the cooperation relationship between the adjustment screw, the threaded support, the open clamp, and the movable mirror frame.

[0045] Figure 8 This is a cross-sectional view of the opening clamp of the optical path adjustment module in this embodiment, which shows the structural relationship of the clamping hole, the opening, the first clamping ear, the second clamping ear and the locking screw.

[0046] Figure 9 This is a schematic diagram of the lens frame adjustment structure of the optical path adjustment module in this embodiment, showing the positional distribution of the first adjustment screw, the second adjustment screw, the fulcrum, and the corresponding opening clamp.

[0047] Figure 10 This is a cross-sectional schematic diagram of the reflector holding structure of the optical path adjustment module in this embodiment, which shows the cooperation relationship between the lens holder, the limiting seat surface, the lens support part and the reflector.

[0048] Figure 11 This is a cross-sectional view and end face structure diagram of the calibration piece assembly of the optical path adjustment module in this embodiment. It shows the positioning and fit relationship between the calibration piece and the first light-transmitting hole, as well as the structure of the positioning outer periphery, axial shoulder surface and center mark.

[0049] Figure 12 This is a partial cross-sectional schematic diagram of the elastic pre-tightening connection structure of the optical path adjustment module in this embodiment. It shows the connection between the elastic pre-tightening member and the fixed lens frame and the movable lens frame, as well as the abutting relationship between the abutting end of the adjusting screw and the movable lens frame.

[0050] like Figures 1 to 12As shown, the present invention provides an optical path adjustment module, including a fixed lens frame 10, a movable lens frame 20 and an adjustment screw 40. The movable lens frame 20 is rotatably connected to the fixed lens frame 10, and a reflector 30 is installed on the movable lens frame 20. A threaded support 50 and an open clamp 60 are fixedly connected to the fixed lens frame 10, and the threaded support 50 and the open clamp 60 are spaced apart along the axial direction of the adjustment screw 40.

[0051] It should be noted that the threaded support 50 and the open clamp 60 should be installed and tightened before the optical path adjustment, and their installation positions are determined according to the common axis of the adjusting screw 40. During assembly, with the open clamp 60 not locked, the adjusting screw 40 should be able to rotate normally and move forward and backward along the axial direction. The installation deviation between the two should not be corrected by forcibly clamping, so as to avoid the adjusting screw 40 being subjected to additional bending force.

[0052] The mounting point of the open clamp 60 should have sufficient support rigidity to prevent deformation of the mounting point from pulling the threaded support 50 during locking. The connection between the movable mirror frame 20 and the fixed mirror frame 10 constrains the overall position of the movable mirror frame 20, while retaining the deflection degree of freedom required for angle adjustment, so that the advance and retreat of the abutment end 43 can be converted into a change in the orientation of the reflector 30.

[0053] The adjusting screw 40 has a threaded section 41 and a smooth section 42 arranged coaxially. The threaded section 41 is threadedly engaged with the threaded support part 50. The abutting end 43 of the adjusting screw 40 abuts against the movable frame 20. An elastic preload 220 is provided between the fixed frame 10 and the movable frame 20 to keep the movable frame 20 abutting against the abutting end 43.

[0054] Specifically, when the adjusting screw 40 is rotated, the threaded engagement converts the rotational motion into axial feed. If the lead of the thread is L, then for each rotation of the adjusting screw 40, the abutment end 43 moves a distance L axially. The position of the abutment end 43 can be gradually adjusted by controlling the rotation angle.

[0055] When the abutting end 43 is pushed towards the movable frame 20, it overcomes the elastic pre-tightening effect and pushes the movable frame 20 to deflect. When the abutting end 43 retracts, the elastic pre-tightening element 220 drives the movable frame 20 to rotate accordingly, preventing contact disengagement after the abutting end 43 retracts. The elastic pre-tightening element 220 should remain in a pre-tightened state throughout the entire adjustment range. Its pre-tightening force should be sufficient to maintain contact and allow the movable frame 20 to follow the movement of the abutting end 43. Excessive pre-tightening force should not cause significant deformation of the frame or adjusting screw 40.

[0056] The open clamp 60 has a clamping hole 61 through which the smooth section 42 passes, and a seat opening 62 extending from the clamping hole 61 to the outside of the open clamp 60. Locking screws 70 are provided on both sides of the seat opening 62. The locking screws 70 pass through the clamping portion on one side of the seat opening 62 and are threadedly connected to the clamping portion on the other side of the seat opening 62, so that the inner wall of the clamping hole 61 clamps the smooth section 42 by narrowing the seat opening 62.

[0057] When the locking screw 70 is tightened, the screw head and the threaded connection jointly apply opposing forces to both sides of the opening 62 of the seat, causing the opening clamp 60 to close within its elastic deformation range. The inner wall of the clamping hole 61 then presses against the outer circumferential surface of the smooth section 42. The friction generated by the contact pressure restricts the rotation and axial movement of the adjusting screw 40. The locking operation should be performed after the adjusting screw 40 has stopped rotating, gradually increasing the clamping force to avoid over-tightening that could cause the adjusting screw 40 to bend or the clamp to undergo permanent deformation.

[0058] Since the clamping force is applied to the smooth section 42, the shrinkage deformation of the clamp does not occur directly at the threaded mating part; however, the locking force will still be transmitted through the adjusting screw 40 and the fixed frame 10, so the position should not be maintained by excessive clamping force. When adjusting again, first loosen the locking screw 70 to allow the open clamp 60 to elastically expand and release the clamp, and then rotate the adjusting screw 40 to avoid forcibly adjusting while clamped and scratching the mating surface.

[0059] The working principle of this invention is as follows: During adjustment, first loosen the locking screw 70 to release the clamping of the inner wall of the clamping hole 61 of the open clamp 60 from the smooth section 42 of the adjusting screw 40. Then rotate the adjusting screw 40. Through the threaded engagement between the threaded section 41 and the threaded support part 50 on the fixed frame 10, the adjusting screw 40 moves axially. At the same time, the smooth section 42 rotates and moves axially within the clamping hole 61. The abutting end 43 of the adjusting screw 40 abuts against the movable frame 20. With the cooperation of the elastic pre-tightening member 220 between the fixed frame 10 and the movable frame 20, the movable frame 20 remains in contact with the abutting end 43 and deflects relative to the fixed frame 10 when the abutting end 43 is pushed forward or retracted, thereby changing the orientation of the reflector 30 and realizing optical path adjustment. After adjustment, tighten the screw through the opening 6 of the seat. The locking screw 70, which is threaded to one side of the clamping part and the other side of the clamping part, narrows the seat opening 62 of the seat body that passes through the clamping hole 61 and the outside of the open clamping seat 60. The smooth section 42 is clamped by the inner wall of the clamping hole 61, thereby locking the adjusting screw 40 at a position axially spaced from the threaded support part 50, and maintaining the adjustment position of the movable mirror frame 20 and the reflector 30. This solution achieves continuous adjustment of the orientation of the reflector 30 through the synergy of threaded engagement and elastic preload, and maintains the contact stability between the adjusting screw 40 and the movable mirror frame 20. By clamping the smooth section 42 at a position independent of the threaded engagement, the positioning is maintained after adjustment, reducing local damage and position disturbance caused by directly pressing the threaded part, which is beneficial to balance the optical path adjustment accuracy, locking stability and reliability of repeated adjustment.

[0060] In this embodiment, the abutting end 43, the threaded section 41, and the smooth section 42 are arranged sequentially in a direction away from the movable mirror frame 20; the abutting end 43 has an arc-shaped abutting surface 431 protruding toward the movable mirror frame 20, and the outer diameter of the threaded section 41 is smaller than the diameter of the smooth section 42.

[0061] Specifically, when the adjusting screw 40 moves forward and backward, the contact position between the arc-shaped contact surface 431 and the movable frame 20 can move with the deflection of the movable frame 20, avoiding the contact between the flat end face and the edge due to the tilt of the frame, thus ensuring that the contact end 43 maintains a relatively stable force transmission state in different adjustment positions. Compared to the threaded section 41, the smooth section 42 with a larger diameter can reduce local deformation under the same clamping load and bear the clamping pressure with a continuous outer peripheral surface. During machining, the coaxiality between the two sections should be controlled to avoid forcing the adjusting screw 40 to deflect when clamping the smooth section 42, thereby changing the position of the contact end 43.

[0062] In this embodiment, it is further explained that a screw shoulder 44 is formed at the connection between the threaded section 41 and the smooth section 42, and an adjusting handle 45 is fixedly connected to the end of the smooth section 42 away from the threaded section 41; the axial length of the smooth section 42 is greater than the sum of the axial length of the clamping hole 61 and the axial adjustment stroke of the adjusting screw 40 relative to the threaded support 50; when the adjusting screw 40 is at any position within the axial adjustment stroke, the clamping hole 61 is always located within the axial range of the smooth section 42, and axial gaps are left between the end face of the open clamp 60 facing the screw shoulder 44 and the screw shoulder 44, and between the end face of the open clamp 60 facing the adjusting handle 45 and the adjusting handle 45.

[0063] It should be noted that the length of the smooth section 42 should simultaneously meet the requirements of adjustment stroke, effective clamping length, and clearance at both ends, and cannot be determined solely by whether it can pass through the clamping hole 61 in a certain adjustment position. After assembly, the adjusting screw 40 can be turned to both ends of the predetermined adjustment stroke to check whether there is still any gap between the screw shoulder 44 and the open clamp 60, and between the adjusting handle 45 and the open clamp 60, and to confirm that the clamping hole 61 does not extend beyond the boundary between the smooth section 42 and the adjacent part. The adjusting handle 45 drives the adjusting screw 40 to rotate and move axially with it. Neither the screw shoulder 44 nor the adjusting handle 45 serves as a locking part that presses against the open clamp 60, thereby avoiding the application of additional axial force to the adjusting screw 40 through end face contact.

[0064] In this embodiment, the open clamp 60 specifically includes a clamp body 63 and a clamp mounting part 64 connected to the clamp body 63. A clamping hole 61 and an opening are provided on the clamp body 63. The clamp mounting part 64 is located on the radial side of the clamping hole 61 and is fixedly connected to the fixed frame 10. The clamp body 63 forms a first clamping ear 65 and a second clamping ear 66 on both sides of the opening. The first clamping ear 65 is provided with a screw through hole 651, and the second clamping ear 66 is provided with a locking threaded hole opposite to the screw through hole 651. The locking screw 70 passes through the screw through hole 651 and is threadedly connected to the locking threaded hole. The axis of the locking screw 70 is perpendicular to the axis of the adjusting screw 40.

[0065] When the locking screw 70 is tightened, the screw head presses against the first clamping lug 65, and the threaded connection transmits tension to the second clamping lug 66, bringing the two clamping lugs closer together. The screw through hole 651 should allow the locking screw 70 to pass through and allow for slight displacement of the first clamping lug 65 to prevent the screw shank from jamming against the hole wall and hindering the narrowing of the opening.

[0066] During the locking process, the clamp mounting part 64 remains connected to the fixed frame 10, while the clamp body 63 changes the size of the clamping hole 61 through local elastic deformation. The opening width should be such that when the smooth section 42 is clamped in the inner wall of the clamping hole 61, the first clamping ear 65 and the second clamping ear 66 are not yet locked together. The direction of force applied by the locking screw 70 is perpendicular to the axis of the adjusting screw 40, so that the clamping action is mainly carried out in the lateral direction, but it should still be avoided that the adjusting screw 40 bears excessive lateral load due to uneven deformation of the clamp.

[0067] As a preferred embodiment, the adjusting screw 40 is configured as a first adjusting screw 46 and a second adjusting screw 47; the threaded support portion 50 is configured with a first threaded support portion threadedly engaged with the first adjusting screw 46 and a second threaded support portion threadedly engaged with the second adjusting screw 47; the open clamp 60 is configured as a first open clamp 67 and a second open clamp 68 respectively clamping the smooth section 42 of the first adjusting screw 46 and the smooth section 42 of the second adjusting screw 47.

[0068] The movable frame 20 is supported on the fixed frame 10 by the fulcrum 80. The first adjusting screw 46 and the second adjusting screw 47 respectively abut against two spaced positions of the movable frame 20. The two spaced positions are not collinear with the fulcrum 80. The elastic preload 220 is located outside the light-transmitting area of ​​the reflector 30 and is connected between the fixed frame 10 and the movable frame 20, so that the movable frame 20 is simultaneously abutted against the abutting end 43 of the first adjusting screw 46 and the abutting end 43 of the second adjusting screw 47.

[0069] The two contact points and the fulcrum 80 together determine the supporting posture of the movable frame 20. When the position of the second adjusting screw 47 remains unchanged and the first adjusting screw 46 is rotated, the movable frame 20 mainly deflects about the line connecting the fulcrum 80 and the contact point of the second adjusting screw 47; when the position of the first adjusting screw 46 remains unchanged and the second adjusting screw 47 is rotated, the movable frame 20 mainly deflects about the line connecting the fulcrum 80 and the contact point of the first adjusting screw 46.

[0070] Since the three support positions are not collinear, the two adjusting screws 40 can change the tilt state of the movable frame 20 in different directions. However, the two adjusting directions do not need to be perpendicular to each other. In actual adjustment, small forward and backward movements can be made alternately until the beam reaches the desired position. The elastic preload 220 should be positioned so that both contact points remain under pressure to prevent the other contact point from disengaging when adjusting one adjusting screw 40. After adjustment, lock the first open clamp 67 and the second open clamp 68 respectively, and check the beam position before and after locking.

[0071] In this embodiment, the movable frame 20 is provided with a lens pressing plate 90, a limiting seat surface 21, and a lens support portion 22. The lens pressing plate 90 includes a fixing root 91 and an elastic tongue 92 connected to the fixing root 91. The fixing root 91 is pressed against the limiting seat surface 21 by a fastening screw 93. The free end of the elastic tongue 92 elastically presses against the non-light-transmitting edge of the reflector 30. The lens support portion 22 abuts against the side of the reflector 30 away from the elastic tongue 92, and is positioned opposite to the pressing position of the elastic tongue 92 along the thickness direction of the reflector 30.

[0072] When installing the reflector 30, first place the reflector 30 on the lens support 22, then install the lens clamp 90 and tighten the fastening screw 93. As the fixing root 91 approaches the limiting seating surface 21, the free end of the elastic tongue 92 contacts the edge of the reflector 30 and generates elastic flexing; after the fixing root 91 is fully seated, the installation height of the lens clamp 90 is limited, and the holding force on the reflector 30 is mainly determined by the flexing amount and stiffness of the elastic tongue 92, without relying on continuously increasing the tightening force of the fastening screw 93 to directly press the reflector 30.

[0073] The pressing position of the elastic tongue 92 is opposite to the lens support 22, so that the clamping force is mainly transmitted along the thickness direction of the reflector 30, reducing the bending effect caused when the pressing position and the support position are misaligned. The contact edge of the elastic tongue 92 should be rounded and its deflection should be controlled within the elastic deformation range to avoid scratching the edge of the reflector 30 or reducing the clamping force due to permanent deformation.

[0074] In this embodiment, the optical path adjustment module also includes a mounting base 100 connected to the fixed lens frame 10, and a stand 110 disposed on the mounting base 100; the stand 110 is provided with two pillars 120, the upper ends of the two pillars 120 are connected to a top horizontal plate 130, and an optical carrier 140 is disposed between the two pillars 120, the optical carrier 140 having a light-carrying hole.

[0075] Specifically, the optical support 140 can be fitted with a lens or other optical elements with a light-transmitting area. During installation, the light-transmitting area of ​​the optical element corresponds to the light-transmitting aperture of the support, preventing the optical support 140 from blocking the light beam. The load borne by the optical support 140 is transferred to the stand 110 and the mounting base 100 via two pillars 120. The top horizontal plate 130 connects the upper ends of the two pillars 120, limiting the relative offset between the two pillars 120. During assembly, the mounting position of the stand 110 is determined according to the light beam path reflected by the reflector 30, allowing the light beam to enter the light-transmitting aperture and pass through the effective light-transmitting area of ​​the optical element.

[0076] In this embodiment, the optical support 140 is slidably engaged with the two pillars 120, and the top horizontal plate 130 is provided with a support adjustment screw 150 that abuts against the optical support 140; the axis of the support adjustment screw 150 is parallel to the extension direction of the pillars 120, and the abutment position of the support adjustment screw 150 on the optical support 140 is located outside the support light-transmitting hole.

[0077] It should be noted that the load-bearing adjusting screw 150 is threaded into the top horizontal plate 130. When the load-bearing adjusting screw 150 is rotated, its end moves forward and backward along the extension direction of the column member 120. When the load-bearing adjusting screw 150 is pushed towards the optical support member 140, it pushes the optical support member 140 to move along the two columns 120. The two sliding fits together restrict the rotation of the optical support member 140 with the screw, so that the optical elements mounted on the optical support member 140 mainly undergo position adjustment.

[0078] Since the abutment connection cannot transmit tensile force, when the load-bearing adjusting screw 150 is retracted, the optical support component 140 can be manually supported and moved along with it. After adjustment, the position of the optical support component 140 can be fixed. The abutment position avoids the load-bearing light-transmitting hole, so that the adjustment pressure is applied to the solid part of the optical support component 140, preventing the screw tip from entering the light-transmitting area or directly pressing against the optical element.

[0079] In this embodiment, the optical path adjustment module further includes a back plate 160 connected to the fixed lens frame 10. A first cantilever bracket 170 and a second cantilever bracket 180 are spaced apart on the back plate 160. The first cantilever bracket 170 and the second cantilever bracket 180 extend to the same side of the back plate 160 and are respectively provided with a first light-transmitting hole 171 and a second light-transmitting hole 181. The first light-transmitting hole 171 and the second light-transmitting hole 181 are coaxial and spaced apart along a common axis.

[0080] Specifically, the first light-transmitting aperture 171 and the second light-transmitting aperture 181 form two positional references spaced apart along the beam propagation direction. During calibration, the position of the beam relative to the center of the aperture at each of the two light-transmitting apertures can be observed, and the deflection angle of the reflector 30 can be adjusted accordingly. When the beam is close to the center of the aperture at the first light-transmitting aperture 171 but significantly deviates from the center at the second light-transmitting aperture 181, it indicates that the beam propagation direction still deviates from the common axis of the two light-transmitting apertures, and further adjustment is required. The axial distance between the two light-transmitting apertures allows the directional deviation of the beam to be manifested as a positional deviation at the rear aperture position. However, the fact that the beam only passes through the two light-transmitting apertures does not mean that the beam has coincided with the common axis; it is still necessary to judge in conjunction with the position of the aperture center.

[0081] In this embodiment, a calibration plate 190 is detachably disposed inside the first light-transmitting hole 171. The calibration plate 190 has a positioning outer periphery 191 that mates with the hole wall of the first light-transmitting hole 171, and an axial shoulder surface 192 that abuts against the end face of the first cantilever bracket 170. The positioning outer periphery 191 forms an anti-rotation fit with the hole wall of the first light-transmitting hole 171. A center mark 193 located on the axis of the first light-transmitting hole 171 is disposed on the calibration plate 190.

[0082] Specifically, when installing the calibration piece 190, the positioning outer periphery 191 is inserted along the first light-transmitting hole 171 until the axial shoulder surface 192 abuts against the end face of the first cantilever bracket 170. The positioning outer periphery 191 restricts the lateral movement of the calibration piece 190 within the hole, the axial shoulder surface 192 limits the insertion depth, and the anti-rotation fit restricts the calibration piece 190 from rotating around the hole axis, ensuring that the calibration piece 190 maintains a consistent installation position and circumferential posture after repeated disassembly and reassembly.

[0083] During calibration, use the center mark 193 as a reference for observing the beam position. Adjust the reflector 30 to align the calibration spot with the center mark 193. After completing the calibration at this point, remove the calibration piece 190 and check the subsequent optical path to prevent the calibration piece 190 from blocking the normal processing beam. The center mark 193 can be in the form of a crosshair to allow observation of the spot's offset in two directions.

[0084] In this embodiment, the optical path adjustment module also includes a back plate 160. The fixed lens frame 10 is configured as an upper fixed lens frame 11 and a lower fixed lens frame 12. The upper fixed lens frame 11 and the lower fixed lens frame 12 are connected to the back plate 160 through an upper protruding lens mount 200 and a lower protruding lens mount 210, respectively. The upper protruding lens mount 200 and the lower protruding lens mount 210 are spaced apart along the height direction of the back plate 160 and extend to the same side of the back plate 160. The light-transmitting openings 13 of the upper fixed lens frame 11 and the lower fixed lens frame 12 have different orientations.

[0085] It should be noted that the upper protruding mirror mount 200 and the lower protruding mirror mount 210 support the corresponding fixed mirror frame 10 on the outside of the back plate 160, leaving installation and operation space between the reflector 30 and its adjustment parts and the back plate 160. During assembly, the installation orientation of the upper fixed mirror frame 11 and the lower fixed mirror frame 12 is determined according to the direction of the incident beam and the output beam, so that the corresponding reflector 30 can complete beam deflection at different heights. The two light-transmitting openings 13 have different orientations, and the two reflectors 30 are not required to adopt the same installation posture; the specific reflection direction is determined by the mirror surface orientation and deflection adjustment amount of each reflector 30. Calibration should be performed sequentially along the beam propagation sequence. First, adjust the previous reflector 30 so that the beam enters the effective reflection area of ​​the next reflector 30, and then adjust the next reflector 30 so that the output beam enters the subsequent optical elements.

[0086] Example 2: The present invention also provides a laser drilling device, including an optical path adjustment module as described in Embodiment 1. In the laser drilling device, the optical path adjustment module is disposed between the laser and the subsequent processing optical components. The laser beam is deflected by a reflector at 30° before entering the subsequent optical path and is focused onto the workpiece surface by a focusing optical element.

[0087] After equipment assembly or optical component replacement, first loosen the locking screw 70, then adjust the deflection angle of the reflector 30 by adjusting the screw 40, so that the beam enters the predetermined incident position of the subsequent optical components. After confirming the optical path, maintain the position of the adjusting screw 40 and gradually tighten the locking screw 70 so that the open clamp 60 holds the smooth section 42, and then verify the beam position. This adjustment and locking method reduces the disturbance of the adjusted attitude of the reflector 30 during the locking operation, thereby reducing the repeated loosening, adjustment and locking operations during equipment calibration.

[0088] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0089] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An optical path adjustment module, characterized in that, The lens includes a fixed frame (10), a movable frame (20), and an adjusting screw (40). The movable frame (20) is rotatably connected to the fixed frame (10), and a reflector (30) is mounted on the movable frame (20). The fixed frame (10) is fixedly connected to a threaded support (50) and an open clamp (60). The threaded support (50) and the open clamp (60) are spaced apart along the axial direction of the adjusting screw (40). The adjusting screw (40) has a threaded section (41) and a smooth section (42) arranged coaxially. The threaded section (41) is threadedly engaged with the threaded support (50). The abutting end (43) of the adjusting screw (40) abuts against the movable frame (20). An elastic preload (220) is provided between the fixed frame (10) and the movable frame (20) to keep the movable frame (20) abutting against the abutting end (43). The open clamp (60) has a clamping hole (61) through which the smooth section (42) passes, and a seat opening (62) extending from the clamping hole (61) to the outside of the open clamp (60). Locking screws (70) are provided on both sides of the seat opening (62). The locking screws (70) pass through the clamping portion on one side of the seat opening (62) and are threadedly connected to the clamping portion on the other side of the seat opening (62) so that the inner wall of the clamping hole (61) clamps the smooth section (42) by narrowing the seat opening (62).

2. The optical path adjustment module according to claim 1, characterized in that, The abutting end (43), the threaded section (41), and the smooth section (42) are arranged sequentially in a direction away from the movable frame (20); The abutting end (43) has an arc abutting surface (431) protruding toward the movable frame (20), and the outer diameter of the threaded section (41) is smaller than the diameter of the smooth section (42).

3. The optical path adjustment module according to claim 2, characterized in that, The connection between the threaded section (41) and the smooth section (42) forms a screw shoulder (44), and an adjustment handle (45) is fixedly connected to one end of the smooth section (42) away from the threaded section (41). The axial length of the smooth section (42) is greater than the sum of the axial length of the clamping hole (61) and the axial adjustment stroke of the adjusting screw (40) relative to the threaded support (50); When the adjusting screw (40) is in any position within the axial adjustment stroke, the clamping hole (61) is located within the axial range of the smooth section (42), and there are axial gaps between the end face of the open clamp (60) facing the screw shoulder (44) and the screw shoulder (44), and between the end face of the open clamp (60) facing the adjusting handle (45) and the adjusting handle (45).

4. The optical path adjustment module according to claim 1, characterized in that, The open clamp (60) includes a clamp body (63) and a clamp mounting part (64) connected to the clamp body (63). The clamping hole (61) and the seat opening (62) are provided on the clamp body (63). The clamp mounting part (64) is located on the radial side of the clamping hole (61) and is fixedly connected to the fixed frame (10). The clamp body (63) forms a first clamping ear (65) and a second clamping ear (66) on both sides of the opening (62) of the seat body, respectively. The first clamping ear (65) is provided with a screw through hole (651), and the second clamping ear (66) is provided with a locking thread hole opposite to the screw through hole (651). The locking screw (70) passes through the screw through hole (651) and is threadedly connected to the locking thread hole. The axis of the locking screw (70) is perpendicular to the axis of the adjusting screw (40).

5. The optical path adjustment module according to claim 1, characterized in that, The adjusting screw (40) is configured as a first adjusting screw (46) and a second adjusting screw (47). The threaded support part (50) is configured with a first threaded support part that is threadedly engaged with the first adjusting screw (46) and a second threaded support part that is threadedly engaged with the second adjusting screw (47). The open clamp (60) is configured as a first open clamp (67) and a second open clamp (68) respectively clamping the smooth section (42) of the first adjusting screw (46) and the smooth section (42) of the second adjusting screw (47). The movable frame (20) is supported on the fixed frame (10) by a fulcrum (80). The first adjusting screw (46) and the second adjusting screw (47) respectively abut against two spaced positions of the movable frame (20). The two spaced positions are not collinear with the fulcrum (80). The elastic preload (220) is located outside the light-transmitting area of ​​the reflector (30) and is connected between the fixed frame (10) and the movable frame (20), so that the movable frame (20) is simultaneously abutting against the abutting end (43) of the first adjusting screw (46) and the abutting end (43) of the second adjusting screw (47).

6. The optical path adjustment module according to claim 1, characterized in that, The movable frame (20) is provided with a lens pressing plate (90), a limiting sitting surface (21) and a lens support part (22). The lens clamp (90) includes a fixed root (91) and an elastic tongue (92) connected to the fixed root (91). The fixed root (91) is pressed against the limiting seat surface (21) by a fastening screw (93). The free end of the elastic tongue (92) is elastically pressed against the non-light-transmitting edge of the reflector (30). The lens support (22) abuts against the side of the reflector (30) away from the elastic tongue (92), and the pressing position of the elastic tongue (92) is arranged opposite to the thickness direction of the reflector (30).

7. The optical path adjustment module according to claim 1, characterized in that, It also includes a mounting base (100) connected to the fixed frame (10), and a stand (110) disposed on the mounting base (100). The stand (110) is provided with two pillars (120), the upper ends of the two pillars (120) are connected to a top horizontal plate (130), and an optical carrier (140) is provided between the two pillars (120). The optical carrier (140) has a light-carrying hole.

8. The optical path adjustment module according to claim 7, characterized in that, The optical support (140) is slidably engaged with the two pillars (120), and the top horizontal plate (130) is provided with a bearing adjustment screw (150) that abuts against the optical support (140). The axis of the load-bearing adjusting screw (150) is parallel to the extension direction of the column (120), and the abutment position of the load-bearing adjusting screw (150) on the optical support (140) is located outside the load-bearing light-transmitting hole.

9. The optical path adjustment module according to claim 1, characterized in that, It also includes a back plate (160) connected to the fixed frame (10), and a first cantilever bracket (170) and a second cantilever bracket (180) are provided on the back plate (160) at intervals. The first cantilever bracket (170) and the second cantilever bracket (180) extend to the same side of the back plate (160) and are respectively provided with a first light-transmitting hole (171) and a second light-transmitting hole (181). The first light-transmitting hole (171) and the second light-transmitting hole (181) are coaxial and spaced apart along a common axis.

10. The optical path adjustment module according to claim 9, characterized in that, A calibration plate (190) is detachably disposed inside the first light-transmitting hole (171). The calibration plate (190) has a positioning outer periphery (191) that cooperates with the hole wall of the first light-transmitting hole (171) and an axial shoulder surface (192) that abuts against the end face of the first cantilever bracket (170). The positioning outer periphery (191) forms an anti-rotation fit with the hole wall of the first light-transmitting hole (171), and the calibration piece (190) is provided with a center mark (193) located on the axis of the first light-transmitting hole (171).

11. The optical path adjustment module according to claim 1, characterized in that, It also includes a back plate (160), and the fixed frame (10) is configured as an upper fixed frame (11) and a lower fixed frame (12). The upper fixed frame (11) and the lower fixed frame (12) are respectively connected to the back plate (160) through an upper protruding lens base (200) and a lower protruding lens base (210); The upper protruding lens mount (200) and the lower protruding lens mount (210) are spaced apart along the height direction of the back plate (160) and extend to the same side of the back plate (160). The light-transmitting openings (13) of the upper fixed lens frame (11) and the lower fixed lens frame (12) face different directions.

12. A laser drilling device, characterized in that, Includes the optical path adjustment module as described in any one of claims 1 to 11.

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