Laser focusing device, laser and laser engraving machine

Abstract

The utility model provides a laser focusing device, a laser device and a laser engraving machine. The laser focusing device is configured to assist a laser head in laser focusing. The laser focusing device comprises a mounting frame, a moving assembly, a detection assembly and a control assembly, the moving assembly is movably arranged on the mounting frame at least in the first direction, and the moving assembly is configured to mount the laser head; the detection assembly is movably arranged on the mounting frame, and the detection assembly is configured to detect the position of a to-be-detected piece and generate a first position signal; and the control assembly is in communication connection with the detection assembly, and the control assembly is configured to directly or indirectly control the moving assembly to drive the laser head to move based on the first position signal so as to perform laser focusing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser engraving, and in particular to a laser focusing device, a laser and a laser engraving machine. BACKGROUND

[0002] The laser engraving machine needs to be focused before use to ensure the machining precision. When focusing, some laser engraving machines need manual assistance, and the focusing precision of this focusing method depends on the experience of the operator, and the focusing process takes a long time. CONTENT

[0003] The present application provides a laser focusing device, a laser and a laser engraving machine to solve the problem of low focusing precision in the known technology.

[0004] In a first aspect, the present application provides a laser focusing device configured to assist a laser head in laser focusing; the laser focusing device comprises a mounting frame, a moving assembly, a detection assembly and a control assembly; the moving assembly is movably arranged on the mounting frame in at least a first direction, and the moving assembly is configured to mount the laser head; the detection assembly is movably arranged on the mounting frame, and the detection assembly is configured to detect the position of a to-be-detected piece and generate a first position signal; the control assembly is in communication connection with the detection assembly, and based on the first position signal, the control assembly is configured to directly or indirectly control the moving assembly to move the laser head to perform laser focusing.

[0005] In a possible implementation, the detection assembly is a contact detection assembly, and the detection assembly comprises:

[0006] a contact piece movably arranged in the first direction relative to the mounting frame;

[0007] a first detection piece in communication connection with the control assembly, and the first detection piece is configured to generate the first position signal when the contact piece is located at a first position.

[0008] In a possible implementation, the detection assembly further comprises:

[0009] a base connected to the moving assembly; and

[0010] an elastic piece, one end of the elastic piece being connected to the contact piece;

[0011] wherein the contact piece is movably connected to the base in the first direction, the contact piece has oppositely arranged first and second ends, the first end is configured to contact the to-be-detected piece, the first detection piece is located on a side of the second end away from the first end, and the elastic piece is connected to the second end or a position close to the second end.

[0012] In a possible implementation, the laser focusing device further comprises a second detection member, which is in communication connection with the control assembly and is configured to generate a second position signal when the moving assembly is located at a second position;

[0013] Based on the second position signal, the control assembly is configured to directly or indirectly control the detection assembly to move towards the direction where the to-be-detected member is located.

[0014] In a possible implementation, the laser focusing device further comprises a transmission mechanism arranged on the mounting frame, and the transmission mechanism comprises:

[0015] a driving assembly arranged on the mounting frame;

[0016] a transmission assembly comprising a transmission member and a transmission pair, the driving assembly is in transmission connection with the transmission member to provide a driving force to the transmission member, the transmission member is in transmission connection with the transmission pair, and based on the driving force, the transmission member drives the transmission pair to move along the first direction, and the moving assembly is connected with the transmission pair.

[0017] In a possible implementation, the transmission assembly further comprises a guide member, the guide member is arranged along the first direction, and along a second direction, the guide member is arranged at least intermittently on one side of the transmission member, the second direction intersects with the first direction, the guide member is arranged through the moving assembly and is configured to guide the moving assembly to move along the first direction.

[0018] In a possible implementation, the transmission assembly further comprises a bearing member, the moving assembly is provided with a first through hole, the first through hole penetrates through the moving assembly along the first direction, the bearing member is arranged in the first through hole and is connected with the moving assembly, and the guide member is arranged through the bearing member.

[0019] In a possible implementation, the driving assembly comprises:

[0020] a driving member arranged on the mounting frame;

[0021] a first synchronous wheel in transmission connection with the driving member;

[0022] a second synchronous wheel in transmission connection with the transmission member;

[0023] a synchronous belt, the first synchronous wheel and the second synchronous wheel are in transmission connection through the synchronous belt.

[0024] In a second aspect, the embodiments of the present application further provide a laser device, comprising a laser head and the laser focusing device as described above, wherein the laser head is detachably connected to the moving assembly of the laser focusing device.

[0025] In a possible implementation, the moving assembly is provided with a clamping groove, and the laser head is provided with a clamping protrusion, which is clamped in the clamping groove.

[0026] In a possible implementation, the moving assembly is provided with two clamping protrusions, which are arranged at intervals, and the clamping groove is formed between the two clamping protrusions.

[0027] At least one of the clamping protrusions is provided with a clamping hole, which is communicated with the clamping groove, and the clamping hole is used for passing a fastener, the fastener is connected to the clamping protrusion, and one end of the fastener passing through the clamping hole abuts against the clamping protrusion.

[0028] In a third aspect, the embodiments of the present application further provide a laser engraving machine, comprising a moving device and the laser focusing device or the laser device as described above, wherein the laser device is connected to the moving device.

[0029] The laser focusing device of the present application generates a first position signal by detecting the position of the to-be-detected member through the detecting assembly, and controls the moving assembly to move based on the first position signal, and the laser head is installed on the moving assembly, so that the laser head can be moved by controlling the moving assembly to move, thereby realizing the laser focusing of the laser head. The entire laser focusing process does not require manual intervention, can realize automatic focusing, and improves the focusing precision and the focusing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 FIG. 1 is a structural schematic diagram of the laser device in an embodiment of the present application.

[0031] Figure 2 FIG. 2 is an exploded schematic diagram of the laser focusing device in an embodiment of the present application.

[0032] Figure 3 FIG. 3 is a signal transmission schematic diagram of the laser focusing device in an embodiment of the present application.

[0033] Figure 4 FIG. 4 is an exploded schematic diagram of part of the structure of the laser focusing device in an embodiment of the present application. Figure 2

[0034] FIG. 5 is a sectional view along V-V of the laser focusing device in an embodiment of the present application. Figure 5 Figure 2

[0035] Figure 6 Figure 5 ​​​A magnified schematic diagram of a portion of region A corresponding to the laser focusing device in the diagram.

[0036] Figure 7 for Figure 1 An explosion diagram of the laser in one embodiment.

[0037] Figure 8 for Figure 1 An exploded schematic diagram of the laser in one embodiment from another perspective.

[0038] Figure 9 This is a schematic diagram of the structure of the laser engraving machine of this application in one embodiment.

[0039] Key component symbols: 300, laser engraving machine; 200, laser; 100, laser focusing device; Z, first direction; X, second direction; Y, third direction; 1, laser head; 101, holding protrusion; 102, limiting groove; 2, moving device; 10, outer shell; 11, mounting cavity; 12, through hole; 20, mounting bracket; 21, first mounting plate; 211, second through hole; 212, first through hole; 22, second mounting plate; 220, third through hole; 2 3. Third mounting plate; 24. Fourth mounting plate; 25. Connecting rod; 30. Transmission mechanism; 31. Drive assembly; 311. Drive component; 312. First synchronous pulley; 313. Second synchronous pulley; 314. Synchronous belt; 32. Transmission assembly; 321. Transmission component; 322. Transmission pair; 3221. First section; 3222. Second section; 3223. First connecting hole; 3224. First connecting component; 323. Guide component; 324. Bearing component; 40. Transfer Moving component; 41, First side plate; 411, Holding groove; 412, Holding protrusion; 4121, Limiting protrusion; 4122, Holding hole; 413, Limiting hole; 42, Second side plate; 43, First guide portion; 431, First through hole; 432, Second connecting protrusion; 4320, Third connecting hole; 44, Second guide portion; 45, Third guide portion; 451, Second through hole; 452, First connecting protrusion; 4520, Second connecting hole; 46, Receiving cavity; 47 48. Fastener; 50. Limiting element; 51. Detection component; 51. Contact element; 511. Base; 512. Base portion; 5131. First end; 5132. Second end; 514. Elastic element; 515. Second connector; 516. Third connector; 517. First circuit board; 518. First electrical connector; 52. First detection element; 60. Control component; 70. Positioning detection component; 71. Second circuit board; 72. Second electrical connector; 73. Second detection element.

[0040] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0041] The following description will refer to the accompanying drawings, which are meant to be exemplary embodiments of the present application. However, the application can be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numbers refer to like elements throughout.

[0042] The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, to the extent that the terms "including", "includes", "having", "has", "a", "an", "one" or "said one" are used in this specification and / or claims, they are taken to be open-ended terms that specify the presence of the stated features, integers, steps and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components and / or groups thereof.

[0043] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an overly literal sense unless expressly so defined herein.

[0044] A detailed description of specific embodiments of the present application is described below with reference to the accompanying drawings.

[0045] As shown in Figures 1 to 3 The present embodiment provides a laser focusing device 100 configured to assist a laser head 1 in laser focusing. The laser focusing device 100 comprises a mounting frame 20, a moving assembly 40, a detecting assembly 50, and a control assembly 60.

[0046] For the convenience of subsequent reading, the present application introduces a first direction Z, a second direction X, and a third direction Y to describe the embodiments of the present application. The first direction Z, the second direction X, and the third direction Y can be three mutually non-parallel straight line directions in space; further, the first direction Z, the second direction X, and the third direction Y can be three mutually perpendicular directions in a three-dimensional coordinate system (three-dimensional Cartesian coordinate system). In subsequent embodiments, the first direction Z is taken as the Z-axis direction of the coordinate axis of the three-dimensional coordinate system, the second direction X is taken as the X-axis direction of the coordinate axis of the three-dimensional coordinate system, and the third direction Y is taken as the Y-axis direction of the coordinate axis of the three-dimensional coordinate system.

[0047] The moving assembly 40 is movably arranged on the mounting frame 20 along the first direction Z. The moving assembly 40 is configured to mount the laser head 1, which is detachably connected to the moving assembly 40. The detecting assembly 50 is movably arranged on the mounting frame 20, so that the detecting assembly 50 can also move relative to the mounting frame 20. The detecting assembly 50 is configured to detect the position of the to-be-detected piece, which is a product or workpiece that needs to be cut, and generate a first position signal. The control assembly 60 is communicatively connected to the detecting assembly 50. Based on the first position signal, the control assembly 60 is configured to directly or indirectly control the moving assembly 40 to move the laser head 1, so as to perform laser focusing.

[0048] Thus, the laser focusing device 100 of the present application generates a first position signal through the detecting assembly 50 detecting the position of the to-be-detected piece, and controls the moving assembly 40 to move based on the first position signal, while the laser head 1 is mounted on the moving assembly 40. By controlling the moving assembly 40 to move, the laser head 1 can be moved, thereby realizing laser focusing of the laser head 1. The entire laser focusing process does not require manual intervention, can realize automatic focusing, and improves focusing accuracy and focusing efficiency.

[0049] Please refer to Figures 2 to 5 In an embodiment, the laser focusing device 100 further includes a housing 10 and a transmission mechanism 30. The housing 10 is generally "L"-shaped. Along the first direction Z, the bottom end of the housing 10 is provided with a mounting cavity 11, and the extension direction of the mounting cavity 11 is parallel to the first direction Z. The mounting frame 20 and the transmission mechanism 30 are both arranged in the mounting cavity 11, and part of the moving assembly 40 is located in the mounting cavity 11. Along the third direction Y, one side of the housing 10 is provided with a through port 12, which communicates with the mounting cavity 11. The part of the moving assembly 40 located in the mounting cavity 11 is transmissionally connected to the transmission mechanism 30, and the other part of the moving assembly 40 is exposed outside the housing 10 after passing through the through port 12, so as to facilitate the connection of the laser head 1.

[0050] The mounting frame 20 includes a first mounting plate 21, a second mounting plate 22, and a third mounting plate 23.

[0051] Along the first direction Z, the first mounting plate 21 and the second mounting plate 22 are arranged at intervals. The third mounting plate 23 is located between the first mounting plate 21 and the second mounting plate 22, one end of the third mounting plate 23 is connected to the middle part of the first mounting plate 21, and the other end of the third mounting plate 23 is connected to the edge of the second mounting plate 22, so that the third mounting plate 23 divides the space between the first mounting plate 21 and the second mounting plate 22 into two independent areas along the third direction Y, so as to mount different structures respectively.

[0052] The third mounting plate 23 is connected with the first mounting plate 21 and the second mounting plate 22 by means of bolts or other elements. It can be understood that in other embodiments, the third mounting plate 23 can also be integrally connected with the first mounting plate 21 and the second mounting plate 22.

[0053] In the present embodiment, the transmission mechanism 30 comprises a driving assembly 31 and a transmission assembly 32. The driving assembly 31 is mounted on the first mounting plate 21. The transmission assembly 32 is mounted between the first mounting plate 21 and the second mounting plate 22, and is located on one side of the third mounting plate 23 along the third direction Y.

[0054] Further, the driving assembly 31 comprises a driving element 311, a first synchronous wheel 312, a second synchronous wheel 313, and a synchronous belt 314. The driving element 311 is a power element such as a motor or a motor. The driving shaft of the driving element 311 is parallel to the first direction Z in the axial direction. The driving element 311 is mounted on the first mounting plate 21 and located on the side of the first mounting plate 21 close to the second mounting plate 22. In addition, along the third direction Y, the driving element 311 is located on the side of the third mounting plate 23 away from the transmission assembly 32.

[0055] The mounting frame 20 further comprises a fourth mounting plate 24 and a connecting rod 25. The fourth mounting plate 24 is spaced apart from the first mounting plate 21 away from the second mounting plate 22 along the first direction Z. The connecting rod 25 is arranged between the first mounting plate 21 and the fourth mounting plate 24 along the first direction Z, and the two ends of the connecting rod 25 are connected to the first mounting plate 21 and the fourth mounting plate 24 respectively. The number of connecting rods 25 is four, and they are distributed in a rectangular shape.

[0056] The first synchronous wheel 312 and the second synchronous wheel 313 are located between the first mounting plate 21 and the fourth mounting plate 24, and are spaced apart along the third direction Y. The axes of the first synchronous wheel 312 and the second synchronous wheel 313 are parallel to the first direction Z.

[0057] The one end of the first synchronous wheel 312 is coaxially fixed to the driving shaft of the driving element 311, and the other end of the first synchronous wheel 312 is rotatably mounted on the fourth mounting plate 24. The one end of the second synchronous wheel 313 is rotatably mounted on the fourth mounting plate 24, and the other end is rotatably mounted on the first mounting plate 21. The first synchronous wheel 312 and the second synchronous wheel 313 are drivingly connected by the synchronous belt 314. The driving element 311 drives the first synchronous wheel 312 to rotate, and the first synchronous wheel 312 in turn drives the second synchronous wheel 313 to rotate through the synchronous belt 314.

[0058] Further, the transmission assembly 32 comprises a transmission element 321 and a transmission pair 322.

[0059] In the embodiment, the transmission assembly 32 is provided as a screw transmission structure, the transmission member 321 is a screw, and the transmission pair 322 is a screw sleeve matched with the screw. It can be understood that in other embodiments, the transmission member 321 and the transmission pair 322 can also be components of other linear movement structures.

[0060] The transmission member 321 is arranged between the first mounting plate 21 and the second mounting plate 22 along the first direction Z. The two ends of the transmission member 321 are rotatably connected to the first mounting plate 21 and the second mounting plate 22 through rotary bearings, respectively, and the top end of the transmission member 321 is coaxially connected to the second synchronous wheel 313 after penetrating through the first mounting plate 21, so as to drive the transmission member 321 to rotate by the second synchronous wheel 313. The transmission pair 322 is sleeved on the outer circumferential surface of the transmission member 321, and the transmission pair 322 is connected with the transmission member 321 through a threaded connection, so as to drive the transmission pair 322 to move along the first direction Z by the rotation of the transmission member 321. The movement assembly 40 is connected with the transmission pair 322, so that the movement assembly 40 can move along the first direction Z with the transmission pair 322.

[0061] The transmission assembly 32 realizes linear reciprocating movement in a manner of screw and screw sleeve cooperation, can utilize the mechanical self-locking action between the screw and the screw sleeve, and can make the transmission assembly 32 have the function of power-off self-locking.

[0062] The transmission assembly 32 further includes a guide member 323 and a bearing member 324. The guide member 323 is arranged between the first mounting plate 21 and the second mounting plate 22 along the first direction Z. Along the second direction X, the guide member 323 is at least spaced apart on one side of the transmission member 321. In the embodiment, the number of the guide members 323 is two, and the two guide members 323 are spaced apart on the opposite sides of the transmission member 321 along the second direction X.

[0063] It can be understood that in other embodiments, the number of the guide members 323 can also be one, and the guide members 323 are spaced apart on one side of the transmission member 321 along the second direction X.

[0064] The guide member 323 is in a cylindrical shape, one end of the guide member 323 is fixed to the first mounting plate 21, and the other end of the guide member 323 is fixed to the second mounting plate 22. The movement assembly 40 is provided with two first through holes 431, the two first through holes 431 are spaced apart along the second direction X, and the first through holes 431 penetrate through the movement assembly 40 along the first direction Z. One bearing member 324 is accommodated in each of the two first through holes 431, and the bearing member 324 is coaxially arranged with the first through hole 431. When the bearing member 324 is located in the first through hole 431, the bearing member 324 and the movement assembly 40 can be fixed by screws or other elements.

[0065] The bearing member 324 is a linear bearing, and the guide member 323 is arranged through the bearing member 324, so that the movement assembly 40 is guided to slide along the first direction Z relative to the guide member 323 through the bearing member 324, and the sliding precision of the movement assembly 40 is improved.

[0066] Therefore, in the laser focusing device 100, the driving member 311 is arranged coaxially with the transmission member 321, so that the driving member 311 is not directly subjected to the impact feedback of the transmission member 321 and is not easily damaged, and the position of the driving member 311 is not too forward, so that the center of gravity of the laser focusing device 100 is not forward. At the same time, the first synchronous wheel 312 and the second synchronous wheel 313 are connected through the synchronous belt 314, when the transmission pair 322 is subjected to external impact, the transmission member 321 receives the impact of the transmission pair 322 and further transmits the impact to the second synchronous wheel 313, while the driving member 311 still drives the synchronous belt 314 to move through the first synchronous wheel 312, and the synchronous belt 314 slips to jump the teeth, so as to offset the external impact.

[0067] Please combine Figure 4 and Figure 5 In an embodiment, the movement assembly 40 includes a first side plate 41, a second side plate 42, a first guide part 43, and a second guide part 44. Along the third direction Y, the first side plate 41 and the second side plate 42 are arranged at intervals, and a receiving cavity 46 is formed between the first side plate 41 and the second side plate 42, and the first side plate 41 is located on the side of the second side plate 42 away from the third mounting plate 23. Along the second direction X, the first guide part 43 and the second guide part 44 are arranged at intervals, and the first guide part 43 and the second guide part 44 are located in the receiving cavity 46.

[0068] The shapes of the first guide part 43 and the second guide part 44 are both cylindrical, and the directions of the axes of the first guide part 43 and the second guide part 44 are parallel to the first direction Z. Along the third direction Y, one side of the first guide part 43 is integrally connected to one end of the first side plate 41 along the second direction X, and the other side of the first guide part 43 is integrally connected to one end of the second side plate 42 along the second direction X. Along the third direction Y, one side of the second guide part 44 is integrally connected to the other end of the first side plate 41 along the second direction X, and the other side of the second guide part 44 is integrally connected to the other end of the second side plate 42 along the second direction X. Two first through holes 431 are respectively arranged in the first guide part 43 and the second guide part 44, and pass through the first guide part 43 and the second guide part 44.

[0069] Further, the moving assembly 40 further comprises a third guide portion 45. The third guide portion 45 is located in the receiving cavity 46 and between the first guide portion 43 and the second guide portion 44. The third guide portion 45 is in a cylindrical shape, and the axis of the third guide portion 45 is parallel to the first direction Z. Along the third direction Y, the two opposite sides of the third guide portion 45 are integrally connected to the first side plate 41 and the second side plate 42, respectively.

[0070] The third guide portion 45 is provided with a second through hole 451, which penetrates the third guide portion 45 along the first direction X, and the second through hole 451 is for the transmission member 321 to pass through.

[0071] The transmission pair 322 is in a trapezoidal shape and comprises a first section 3221 and a second section 3222 integrally connected. The first section 3221 is in a square shape, and the second section 3222 is in a cylindrical shape. Along the first direction Z, the second section 3222 is connected to the bottom end of the first section 3221, the transmission member 321 is arranged in the first section 3221 and the second section 3222, and the second section 3222 is located in the second through hole 451.

[0072] The first section 3221 is provided with two first connecting holes 3223, which are arranged at intervals along the second direction X. The two first connecting holes 3223 penetrate the first section 3221 along the first direction Z. Along the second direction X, the two opposite sides of the third guide portion 45 are provided with first connecting protrusions 452, and the two first connecting protrusions 452 are provided with second connecting holes 4520, which penetrate the first connecting protrusions 452 along the first direction X. The first section 3221 is located on the side of the first connecting protrusion 452 away from the second mounting plate 22, and the two first connecting holes 3223 are arranged corresponding to the two second connecting holes 4520. The transmission assembly 32 further comprises two first connecting members 3224, which are screws or other elements, one end of which is screwed into the second connecting hole 4520 after penetrating the first connecting hole 3223, thereby fixing the first section 3221 and the third guide portion 45.

[0073] Please refer to Figures 4 to 6 , and refer to Figure 2 and Figure 3 In an embodiment, the detection assembly 50 is a contact detection assembly. Compared with the non-contact detection method, this direct contact with the detected member can avoid the influence of environmental factors such as dust on the detection accuracy, thereby improving the accuracy of laser focusing. The detection assembly 50 comprises a contact member 51 and a first detection member 52. The contact member 51 is movably arranged along the first direction Z relative to the mounting frame 20. The first detection member 52 is in communication with the control assembly 60, and the first detection member 52 is configured to generate a first position signal when the contact member 51 is located at the first position.

[0074] In the embodiment, the contact piece 51 is movably connected to the moving assembly 40 along the first direction Z, and is configured to contact the to-be-detected piece and be pushed by the to-be-detected piece to move away from the to-be-detected piece. The first detection piece 52 is arranged on the moving assembly 40 and is communicatively connected to the control assembly 60. The first detection piece 52 is configured to send a first position signal to the control assembly 60 when the contact piece 51 is pushed by the to-be-detected piece to move to the first position away from the to-be-detected piece.

[0075] In the embodiment, the detection assembly 50 is a spring probe, and includes a base 511, a contact piece 51, a spring 514, a first circuit board 517, a second connecting piece 515, and a third connecting piece 516.

[0076] The base 511 is in a columnar structure with a hollow interior and open ends, and the second mounting plate 22 is provided with a third through hole 220. The third through hole 220 penetrates the second mounting plate 22 along the first direction Z. The base 511 is arranged along the first direction Z and its bottom end can pass through the third through hole 220.

[0077] The contact piece 51 is at least partially arranged in the base 511 and is slidably connected to the base 511 to slide along the first direction Z relative to the base 511. The base 511 can guide the sliding of the contact piece 51. The contact piece 51 has a first end 5131 and a second end 5132 arranged opposite to each other. The first end 5131 is configured to contact the to-be-detected piece, and the first detection piece 52 is located on the side of the second end 5132 away from the first end 5131 and is configured to send the first position signal when the second end 5132 moves to the first position. The first end 5131 of the contact piece 51 can pass through the bottom end of the base 511 and be exposed outside the base 511, so as to facilitate the contact between the first end 5131 of the contact piece 51 and the to-be-detected piece.

[0078] The top end of the base 511 is provided with a base portion 512 which closes the opening of the top end of the base 511 and has an outer contour which exceeds the base 511. The second end 5132 of the contact piece 51 passes through the opening of the top end of the base 511 and the base portion 512 in sequence and is exposed outside the base 511. The spring 514 is arranged in the base 511 and is sleeved on the outer periphery of the contact piece 51. One end of the spring 514 is elastically connected to the base portion 512, and the other end of the spring 514 is elastically connected to the contact piece 51.

[0079] The first circuit board 517 is spaced above the base 512 along the first direction Z. The first detection member 52 is located between the first circuit board 517 and the base 512, and the first detection member 52 is electrically connected to the first circuit board 517. The first detection member 52 is a contact type limit sensor, and when the contact member 51 moves upward along the first direction Z to the second end 5132 and contacts the trigger portion of the first detection member 52, the first detection member 52 sends a first position signal. The first position is the position of the second end 5132 when it moves to contact the trigger portion of the first detection member 52.

[0080] The second connecting member 515 is a screw or the like, and is arranged through the base 512 along the first direction Z. The bottom end of the second connecting member 515 is located on the side of the base 512 away from the first circuit board 517, and the top end of the second connecting member 515 is located in the space between the first circuit board 517 and the base 512 after penetrating out of the base 512.

[0081] The third connecting member 516 is arranged through the first circuit board 517 along the first direction Z, and the bottom end of the third connecting member 516 is threadedly connected to the top end of the second connecting member 515. The top end of the third connecting member 516 is threadedly connected to the moving assembly 40 after penetrating out of the first circuit board 517.

[0082] Specifically, the number of third connecting members 516 is two, and the two third connecting members 516 are arranged on opposite sides of the base 511 along the second direction X. Correspondingly, the number of second connecting members 515 is also two, and the two second connecting members 515 are arranged correspondingly to the two third connecting members 516.

[0083] The second connecting protrusion 432 is provided on the side of the first guide portion 43 close to the third guide portion 45, and the third connecting hole 4320 is provided on the second connecting protrusion 432. The third connecting hole 4320 penetrates through the second connecting protrusion 432 along the first direction Z. The top end of one of the third connecting members 516 is threadedly connected to the second connecting hole 4520 after penetrating out of the first circuit board 517, and the top end of the other third connecting member 516 is threadedly connected to the third connecting hole 4320 after penetrating out of the first circuit board 517.

[0084] Further, the detection assembly 50 further comprises a first electric connector 518. The first electric connector 518 is arranged on the side of the first circuit board 517 away from the base 512, and is electrically connected to the first circuit board 517 to realize signal transmission between the two.

[0085] Please refer to Figure 5 , and refer to Figure 2 and Figure 3In an embodiment, the laser focusing device 100 further comprises a position detecting assembly 70. The position detecting assembly 70 comprises a second circuit board 71, a second detecting member 73, and a second electrical connector 72. The second detecting member 73 is communicatively connected to the control assembly 60 and is configured to send a second position signal to the control assembly 60 when the moving assembly 40 moves to a second position. Based on the second position signal, the control assembly 60 is configured to directly or indirectly control the detecting assembly 50 to move towards the direction of the to-be-detected member.

[0086] The second circuit board 71 is mounted on the first mounting plate 21 away from the second mounting plate 22. The first mounting plate 21 is provided with a first through hole 212 and a second through hole 211, which penetrate the first mounting plate 21 along the first direction Z. The second detecting member 73 and the second electrical connector 72 are electrically connected to the second circuit board 71 and are located on the side of the second circuit board 71 close to the first mounting plate 21. The second electrical connector 72 penetrates the second through hole 211 to facilitate wiring between the first electrical connector 518 and the second electrical connector 72. The second detecting member 73 is a contact type limit sensor, and the second detecting member 73 is exposed to the first mounting plate 21 after penetrating the first through hole 212, so as to facilitate the trigger part of the second detecting member 73 to contact the moving assembly 40, thereby causing the second detecting member 73 to send a second position signal to the control assembly 60 after the moving assembly 40 contacts the trigger part of the second detecting member 73. The second position is the position of the moving assembly 40 when the moving assembly 40 moves to contact the trigger part of the second detecting member 73. It can be understood that the second position is also the zero position of the detecting assembly 50, so that the first position can take the second position as a reference.

[0087] Therefore, when the laser focusing device 100 needs to focus the auxiliary laser head 1, the moving assembly 40 first moves upward to the second position, thereby triggering the second detecting member 73 to send a second position signal to the control assembly 60. Subsequently, the moving assembly 40 moves downward to the first end 5131 of the contact member 51 to touch the surface of the to-be-detected member, and the moving assembly 40 continues to move downward, the contact member 51 is resisted by the to-be-detected member to move upward, and the elastic member 514 is continuously compressed until the second end 5132 of the contact member 51 moves to the first position, thereby triggering the first detecting member 52 to send a first position signal to the control assembly 60. The control assembly 60 calculates the thickness value of the to-be-detected member according to the first position signal, the second position signal, and the moving distance of the moving assembly 40 from triggering the second position signal to moving to triggering the first position signal. Meanwhile, the focal point of the laser head 1 is fixed, and the control assembly 60 calculates the focal point position of the laser head 1 relative to the current to-be-detected member according to the focal point of the laser head 1 and the above calculated thickness value, and then controls the transmission mechanism 30 to drive the laser head 1 to move upward to the focal point position, thereby completing the focusing.

[0088] It is worth noting that the above focusing process is suitable for single-point plane focusing. When the surface of the object to be detected is an irregular surface, multi-point curved surface focusing is required. This focusing needs to follow the steps of single-point plane focusing to obtain the focus points of each position on the surface of the object to be detected, and then fit the multiple focus points into a curved surface through an algorithm, and subsequently make the laser head 1 change with the change of the curved surface, so as to realize curved surface engraving.

[0089] As shown in Figure 7 and Figure 8 , and referring to Figure 1 , the embodiment also provides a laser 200, comprising a laser head 1 and the above-mentioned laser focusing device 100. Along the third direction Y, the laser head 1 is arranged on one side of the laser focusing device 100, and the laser head 1 is detachably connected to the moving assembly 40 of the laser focusing device 100.

[0090] Specifically, the moving assembly 40 is provided with a clamping groove 411, and the laser head 1 is provided with a clamping protrusion 101 close to one side of the laser focusing device 100, and the clamping protrusion 101 is clamped in the clamping groove 411.

[0091] The first side plate 41 is provided with two clamping protrusions 412 away from the second side plate 42, and the extension directions of the two clamping protrusions 412 are parallel to the first direction Z. Along the second direction X, the two clamping protrusions 412 are arranged at intervals to form a clamping groove 411 between the two clamping protrusions 412.

[0092] At least one clamping protrusion 412 is provided with a clamping hole 4122, which extends from one side of one clamping protrusion 412 away from the other clamping protrusion 412 to penetrate the clamping protrusion 412 where it is located along the second direction X, so that the clamping hole 4122 communicates with the clamping groove 411. The clamping hole 4122 is provided for a fastener 47 to pass through, and the fastener 47 is a bolt or the like element. The threaded section of the fastener 47 is threadedly connected in the clamping groove 411, and the tail end of the fastener 47 is clamped against the clamping protrusion 101 in the clamping groove 411 after passing through the clamping hole 4122, thereby fixing the clamping protrusion 101 in the clamping groove 411 and improving the stability of the connection between the laser head 1 and the moving assembly 40.

[0093] In the embodiment, the number of clamping holes 4122 is two, and the two clamping holes 4122 are arranged on the same clamping protrusion 412. Along the first direction Z, the two clamping holes 4122 are arranged at intervals, and each clamping hole 4122 is provided for one fastener 47 to pass through, so as to simultaneously abut the clamping protrusion 101 through the two fasteners 47.

[0094] Further, the two clamping protrusions 412 are provided with limiting protrusions 4121 on the side close to each other. The limiting protrusions 4121 are spaced apart from the first side plate 41 along the third direction Y. When the clamping protrusion 101 is located in the clamping groove 411, the clamping protrusion 101 is clamped between the limiting protrusions 4121 and the first side plate 41, so as to avoid the clamping protrusion 101 from being separated from the clamping groove 411.

[0095] The limiting protrusions 4121 are roughly triangular in shape, so that the shape of the entire clamping groove 411 is roughly dovetail-shaped, forming a dovetail groove. The clamping protrusion 101 is adapted to the shape of the clamping groove 411, improving the stability of the connection between the clamping protrusion 101 and the moving assembly 40.

[0096] Further, a limiting groove 102 is formed on the side of the clamping protrusion 101 close to the moving assembly 40, the extending direction of the limiting groove 102 is parallel to the first direction Z, and the bottom end of the limiting groove 102 penetrates the laser head 1. A limiting hole 413 is formed on the side of the first side plate 41 away from the second side plate 42, and a limiting member 48 penetrates the limiting hole 413. The limiting member 48 can be a pin or the like, the head end of the limiting member 48 is exposed outside the first side plate 41, and the tail end of the limiting member 48 is threadedly connected in the limiting hole 413. When the clamping protrusion 101 is clamped in the clamping groove 411, the head end of the limiting member 48 extends into the limiting groove 102 and abuts against the bottom wall of the limiting groove 102. In addition, when the clamping protrusion 101 is clamped in the clamping groove 411 and the fastening member 47 abuts against the clamping protrusion 101, the head end of the limiting member 48 abuts against the side wall of the top side of the limiting groove 102 along the first direction Z. In this way, when the laser head 1 needs to be connected with the moving assembly 40, the clamping protrusion 101 is clamped in the clamping groove 411, and the laser head 1 is driven to slide relative to the moving assembly 40 along the first direction Z from bottom to top, until the head end of the limiting member 48 abuts against the side wall of the top side of the limiting groove 102 along the first direction Z, the laser head 1 and the moving assembly 40 are aligned, and then the fastening member 47 is passed through the clamping hole 4122 to abut against the clamping protrusion 101.

[0097] In this way, the laser head 1 and the moving assembly 40 are detachably connected. In the case that the laser head 1 and the contact detection assembly 50 share a set of transmission mechanism 30, different models of laser heads 1 can be quickly replaced based on different use scenarios, so that the laser focusing device 100 can be compatible with different models of laser heads 1.

[0098] As shown in Figure 9 The embodiment also provides a laser engraving machine 300, which comprises the moving device 2 and the laser focusing device 100 or the laser 200, and the laser 200 is connected with the laser focusing device 100.

[0099] The mobile device 2 is configured to drive the laser 200 to move at least along a first direction Z, a second direction X, and a third direction Y to achieve adjustment of the position of the laser 200 in space at least in the first direction Z, the second direction X, and the third direction Y.

[0100] In the foregoing, specific embodiments of the present application have been described with reference to the accompanying drawings. However, it will be understood by those skilled in the art that various changes and substitutions can be made to the specific embodiments of the present application without departing from the scope of the present application. Such changes and substitutions all fall within the scope of the present application.

Claims

1. A laser focusing device, characterized by, A laser focusing device configured to assist a laser head in focusing, the laser focusing device comprising: a mounting frame; a moving assembly movably arranged on the mounting frame in at least a first direction, the moving assembly configured to mount the laser head; a detecting assembly movably arranged on the mounting frame, the detecting assembly configured to detect a position of a to-be-detected member and generate a first position signal; a control assembly communicatively connected with the detecting assembly, based on the first position signal, the control assembly configured to directly or indirectly control the moving assembly to move the laser head to focus.

2. The laser focusing device of claim 1, wherein, The detecting assembly is a contact detecting assembly, the detecting assembly comprising: a contact member movably arranged relative to the mounting frame in the first direction; a first detecting member communicatively connected with the control assembly, the first detecting member configured to generate the first position signal when the contact member is located at a first position.

3. The laser focusing device of claim 2, wherein, The detecting assembly further comprising: a base connected with the moving assembly; and a resilient member, one end of the resilient member connected with the contact member; wherein the contact member is movably connected with the base in the first direction, the contact member having oppositely arranged first and second ends, the first end configured to contact the to-be-detected member, the first detecting member located at a side of the second end away from the first end, the resilient member connected with or close to the second end.

4. The laser focusing device of claim 1, wherein, The laser focusing device further comprising a second detecting member communicatively connected with the control assembly and configured to generate a second position signal when the moving assembly is located at a second position; based on the second position signal, the control assembly configured to directly or indirectly control the detecting assembly to move towards a direction where the to-be-detected member is located.

5. The laser focusing device of claim 1, wherein, The laser focusing device further comprising a transmission mechanism arranged on the mounting frame, the transmission mechanism comprising: a driving assembly arranged on the mounting frame; a transmission assembly comprising a transmission member and a transmission pair, the driving assembly transmissionally connected with the transmission member to provide a driving force to the transmission member, the transmission member transmissionally connected with the transmission pair, based on the driving force, the transmission member driving the transmission pair to move in the first direction, the moving assembly connected with the transmission pair.

6. The laser focusing device of claim 5, wherein, The transmission assembly further comprising a guide member, the guide member arranged in the first direction, in a second direction, the guide member at least intermittently arranged on one side of the transmission member, the second direction intersecting the first direction, the guide member penetrating the moving assembly and configured to guide the moving assembly to move in the first direction.

7. The laser focusing device of claim 6, wherein, The transmission assembly further comprising a bearing member, the moving assembly having a first through hole, in the first direction, the first through hole penetrating the moving assembly, the bearing member arranged in the first through hole and connected with the moving assembly, the guide member penetrating the bearing member.

8. The laser focusing device of claim 5, wherein, The driving assembly comprising: a driving member arranged on the mounting frame; a first synchronous wheel transmissionally connected with the driving member; a second synchronous wheel transmissionally connected with the transmission member. The first synchronous wheel and the second synchronous wheel are drivingly connected by a synchronous belt.

9. A laser characterized by, The laser focusing device as claimed in any one of claims 1 to 8, wherein the laser head is detachably connected to the moving assembly of the laser focusing device.

10. The laser of claim 9, wherein, The moving assembly is provided with a clamping groove, and the laser head is provided with a clamping protrusion which is clamped in the clamping groove.

11. The laser of claim 10, wherein, The moving assembly is provided with two clamping protrusions which are spaced apart, and the clamping groove is formed between the two clamping protrusions. At least one of the clamping protrusions is provided with a clamping hole which is communicated with the clamping groove, and a fastener is passed through the clamping hole, the fastener is connected to the clamping protrusion, and one end of the fastener which is passed through the clamping hole abuts against the clamping protrusion.

12. A laser engraver characterized by, The laser focusing device as claimed in any one of claims 1 to 8, or the laser as claimed in claim 9, wherein the laser is connected to the moving device.

Images