Lens switching mechanism of double-light-source laser engraving machine and laser engraving machine

Abstract

The invention relates to the technical field of laser processing, in particular to a lens switching mechanism of a double-light-source laser engraving machine and the laser engraving machine. The device comprises a rotating seat, the two sides of the rotating seat extend outwards to form rotating arms respectively, and the outer ends of the two rotating arms are connected with a first reflecting mirror and a second reflecting mirror respectively; the base plate is vertically arranged, and a shaft hole is formed in the upper end; one end of the first rotating shaft penetrates through the shaft hole and is fixedly connected with the rotating seat; the first rotating shaft is rotationally connected with the substrate, and the other end of the first rotating shaft is connected with a power unit through a transmission unit; the power unit drives the first rotating shaft to rotate through the transmission unit and drives the rotating seat to rotate, and the first reflecting mirror and the second reflecting mirror can be switched to enter a reflecting position. By arranging the lens switching mechanism, one reflecting mirror in a light path can be switched for use, the laser loss can be effectively reduced, and the effective utilization rate of laser is improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser processing, and in particular to a lens switching mechanism of a dual-light source laser engraving machine and a laser engraving machine. Background Art

[0002] When lasers of different wavelengths are reflected by the same reflector material, the material has different absorption rates for lasers of different wavelengths. Therefore, when setting up the optical path system of a laser engraving machine, the lens material is basically selected to be the material that is most suitable for the laser; and when using a dual-light source laser engraving machine, since it uses two laser transmitters, when designing the optical path system, the reflector connected to the laser engraving head is a shared reflector, and the reflector lens material can only be selected from a material that has a lower absorption rate for the two lasers emitted by the two laser transmitters; but the reflector material still has a relatively large absorption of the two lasers. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies of the prior art and provide a lens switching mechanism for a dual-light source laser engraving machine. The lens switching mechanism is connected to a laser engraving head and is provided with a switchable reflector to reduce the loss of the dual-light source laser absorbed by the reflector during use, thereby achieving better energy saving and engraving effect.

[0004] Another object of the present invention is to provide a laser engraving machine having the above-mentioned lens switching system.

[0005] A lens switching mechanism, comprising: A rotating seat, with rotating arms extending outwards on both sides of the rotating seat, and the outer ends of the two rotating arms are respectively connected to a first reflector and a second reflector; The base plate is vertically arranged and has an axial hole at the upper end; A first rotating shaft, one end of which passes through the shaft hole and is fixedly connected to the rotating seat; the first rotating shaft is rotatably connected to the base plate, and the other end of the first rotating shaft is connected to the power unit through the transmission unit; The power unit drives the first rotating shaft to rotate through the transmission unit and drives the rotating seat to rotate, so that the first reflector and the second reflector can be switched into the reflecting position.

[0006] Furthermore, a positioning structure is provided between the rotating seat and the substrate or a positioning structure is provided between the first rotating shaft and the substrate. When the first reflector or the second reflector is located at the reflecting position, the rotating seat is engaged with the substrate or the first rotating shaft is engaged with the substrate.

[0007] Furthermore, the substrate is provided with a mounting hole, in which a first elastic member and a positioning bead are provided, and the positioning structure includes two positioning recessed holes arranged on the back of the rotating disk, and the two positioning recessed holes correspond one to one to the two rotating arms; when the first reflector enters the reflecting position, the positioning bead is pushed by the first elastic member, and a part of the positioning bead enters one of the positioning recessed holes; when the second reflector enters the reflecting position, the positioning bead is pushed by the first elastic member, and a part of the positioning bead enters the other positioning recessed hole.

[0008] Furthermore, the transmission unit includes an intermediate shaft and a second rotating shaft, the two ends of the intermediate shaft are respectively rotatably connected to the first rotating shaft and the second rotating shaft, and the intermediate shaft can rotate freely relative to the first rotating shaft and the second rotating shaft; a second elastic member is connected between the first rotating shaft and the second rotating shaft, and the second rotating shaft drives the first rotating shaft to rotate through the second elastic member.

[0009] Furthermore, the transmission unit also includes a passive rotating member connected to the second rotating shaft and an active driving member connected to the passive rotating member, the active driving member is connected to the power unit, the power unit drives the active driving member to move, and drives the passive rotating member to rotate.

[0010] Furthermore, a cover body is connected to the back side of the substrate, and the cover body is sleeved outside the first rotating shaft and the middle rotating shaft. The cover body is provided with a through hole matching the second rotating shaft, and the second rotating shaft passes through the through hole and is rotatably connected to the cover body. A rotating wheel is connected to the outer end of the second rotating shaft, and a third elastic member is connected between the rotating wheel and the cover body. When the first reflector enters the reflecting position, the elastic potential energy of the third elastic member is the smallest, and when the second reflector enters the reflecting position, the elastic potential energy of the third elastic member is the largest.

[0011] Preferably, both sides of the cover body are provided with folded edges, the folded edges are provided with connecting grooves, the base plate is provided with connecting holes, and the connecting piece passes through the connecting grooves and extends into the connecting holes to be connected with the base plate.

[0012] A laser engraving machine comprises a frame, wherein the frame is provided with a first laser emitter for emitting a first laser, a second laser emitter for emitting a second laser, a front reflector group and an intermediate reflector; the front reflector comprises a first front reflector for reflecting the first laser to the intermediate reflector, a second front reflector for reflecting the second laser to the intermediate reflector and a front moving mechanism for driving the first front reflector to move; the frame is also provided with an XY moving mechanism, the XY moving mechanism is connected to a laser engraving head assembly and drives the laser engraving head assembly to move, the laser engraving head assembly comprises the above-mentioned lens switching mechanism, and the front lower end of a substrate is connected to a laser engraving head.

[0013] Furthermore, the front moving mechanism is connected to the lens switching mechanism through a transmission member, the front moving mechanism includes a front linear module and a moving block connected to the front linear module, the front linear module drives the moving block to move horizontally or vertically, and the moving block is connected to the first front reflector; the transmission member includes a wire core and a flexible wire sleeve, the flexible wire sleeve is sleeved outside the wire core, both ends of the wire core extend out of the flexible wire sleeve, one end of the wire core is connected to the moving block, and the other end of the wire core is wound and connected to the rotating wheel.

[0014] Furthermore, a plurality of first intermediate reflectors are arranged between the first laser emitter and the first front reflector, or / and a plurality of second intermediate reflectors are arranged between the second laser emitter and the second front reflector.

[0015] Furthermore, the front linear module includes a vertically arranged vertical plate, a vertical guide rail is arranged on the front side of the vertical plate, the vertical guide rail is connected to a vertical slider, and the vertical slider is connected to a moving block; the lower end of the vertical plate is connected to a motor, the motor drive is connected to a lead screw, the lead screw is threadedly connected to a nut block, and the nut block is connected to the moving block.

[0016] Beneficial effects of the present invention: The present invention can switch the use of a reflector in the optical path by setting a lens switching mechanism, which can effectively reduce laser loss and improve the effective utilization rate of laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a principle schematic diagram of the optical path of the laser engraving machine in this embodiment.

[0018] Figure 2 This is a second principle schematic diagram of the optical path of the laser engraving machine in this embodiment.

[0019] Figure 3 Schematic diagram of the structure of the laser engraving machine of this embodiment.

[0020] Figure 4 It is a schematic diagram of the cooperation between the lens switching mechanism and the laser engraving head in this embodiment.

[0021] Figure 5 for Figure 4 Schematic diagram from another perspective.

[0022] Figure 6 for Figure 5 A magnified schematic diagram of point B in the middle.

[0023] Figure 7 for Figure 4 A schematic diagram of a structure without the cover.

[0024] Figure 8 for Figure 7 A magnified schematic diagram of center A.

[0025] Fig. 9 It is a structural schematic diagram of the front moving mechanism of this embodiment.

[0026] Fig.10 A structural diagram of a positioning structure.

[0027] Reference numerals: 1——lens switching mechanism; 2——first reflector; 3——second reflector; 4——laser engraving head assembly; 5——middle reflector; 6——first front reflector; 7——first laser emitter; 8——front moving mechanism; 9——second front reflector; 10——second laser emitter; 11——substrate; 12——rotating seat; 13——rotating arm; 14——first rotating shaft; 15——middle shaft; 16——second elastic member; 17——rotating wheel; 18——second rotating shaft; 19——cover body; 111 ——positioning concave hole; 21——first intermediate reflector; 22——Y moving mechanism; 23——X moving mechanism; 24——XY moving mechanism; 31——positioning bead; 32——first elastic member; 41——laser engraving head; 50——frame; 81——vertical plate; 82——vertical guide rail; 83——vertical slider; 84——motor; 85——lead screw; 86——nut block; 87——moving block; 100——transmission member; 112——third elastic member; 191——folding edge; 192——connecting groove. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] The present invention will be described in detail below with reference to the accompanying drawings. Figures 1 to 10 shown.

[0033] Example 1: See Figures 4 to 8 A lens switching mechanism, comprising: a rotating seat 12, a substrate 11 and a first rotating shaft 14, wherein rotating arms 13 are respectively extended outward on both sides of the rotating seat 12, and the outer ends of the two rotating arms 13 are respectively connected to a first reflector 2 and a second reflector 3; the substrate 11 is vertically arranged, and an axial hole is provided at the upper end of the substrate 11; one end of the first rotating shaft 14 passes through the axial hole and is fixedly connected to the rotating seat 12; and the first rotating shaft 14 is rotatably connected to the substrate 11, and the other end of the first rotating shaft 14 is connected to a power unit through a transmission unit; the power unit drives the first rotating shaft 14 to rotate through the transmission unit and drives the rotating seat 12 to rotate, so that the first reflector 2 and the second reflector 3 can be switched into the reflecting position.

[0034] This technical solution is applied to the laser engraving head 41 of the dual-light source laser engraving machine; the first reflector 2 corresponds to the first laser of the dual-light source laser engraving machine, and the second reflector 3 corresponds to the second laser of the dual-light source laser engraving machine; during normal operation, the first reflector 2 is located at the reflection position, the first laser is projected onto the first reflector 2 and reflected into the laser engraving head 41, and then focused and projected onto the workpiece; when the dual-light source laser engraving machine switches to the second laser operation and the first laser stops, the power unit drives the first rotating shaft 14 to rotate through the transmission unit and drives the rotating seat 12 to rotate, and the positions of the first reflector 2 and the second reflector 3 on the rotating seat 12 change until the second reflector 3 is located at the reflection position; at this time, the second laser is projected onto the second reflector 3, and the second reflector 3 reflects the second laser to the laser engraving head 41, and the second laser is projected onto the workpiece through the laser engraving head 41. The first reflector 2 and the second reflector 3 can both be dedicated reflectors, and the reflectivity corresponding to the first laser and the second laser can reach the minimum or close to the minimum, thereby effectively saving laser energy and reducing loss. Secondly, when the first rotating shaft 14 is rotatably connected to the base plate 11 , a bearing may be provided in the shaft hole, and the first rotating shaft 14 and the bearing are sleeved, so that the first rotating shaft 14 can freely rotate relative to the base plate 11 .

[0035] Secondly, a positioning structure is provided between the rotating seat 12 and the substrate 11 or a positioning structure is provided between the first rotating shaft 14 and the substrate 11. When the first reflector 2 or the second reflector 3 is located at the reflecting position, the rotating seat 12 is engaged with the substrate 11 or the first rotating shaft 14 is engaged with the substrate 11.

[0036] Since the technical solution is applied to laser processing, the directionality requirement is very high; therefore, the rotation position of the rotating seat 12 is also required to be very high; in order to enable the first reflector 2 and the second reflector 3 to accurately enter the reflection position, the present embodiment adopts a positioning structure to position the position of the rotating disk or the first rotating shaft 14, thereby positioning the first reflector 2 or the second reflector 3 to enter the reflection position, so as to achieve the purpose of accurately reflecting the laser.

[0037] See also Fig.10 The substrate 11 is provided with a mounting hole, in which a first elastic member 32 and a positioning bead 31 are provided, and the positioning structure includes two positioning recessed holes 111 arranged on the back of the rotating disk, and the two positioning recessed holes 111 correspond to the two rotating arms 13 one by one; when the first reflector 2 enters the reflecting position, the positioning bead 31 is pushed by the first elastic member 32, and a part of the positioning bead 31 enters one of the positioning recessed holes 111; when the second reflector 3 enters the reflecting position, the positioning bead 31 is pushed by the first elastic member 32, and a part of the positioning bead 31 enters the other positioning recessed hole 111.

[0038] For ease of use, the positioning bead 31 can be spherical, and the positioning concave hole 111 is a spherical crown hole; a portion of the positioning bead 31 is less than or equal to one-half of the positioning bead 31, preferably between one-third and one-half. When in use, the first rotating shaft 14 drives the rotating disk to rotate, and the positioning bead 31 is pushed by the first elastic member 32 to abut against the rotating disk, and the positioning bead 31 forms a small resistance to the rotating disk, which can be ignored; when the first reflector 2 enters the reflection position, the positioning bead 31 is opposite to one of the positioning holes, and a portion of the positioning bead 31 enters the positioning hole, and the positioning bead 31 forms a clamping connection with the rotating disk, and the positioning bead 31 forms a large resistance to the rotating disk; after switching, the first rotating shaft 14 drives the rotating disk to reverse, and the positioning concave hole 111 is separated from the positioning bead 31, and the positioning bead 31 is separated from the positioning concave hole 111 and abuts against the rotating disk, until the second reflector 3 enters the reflection position, another positioning concave hole 111 is opposite to the positioning bead 31, and the positioning bead 31 enters the other positioning concave hole 111, and the positioning bead 31 forms a clamping connection with the rotating disk again. The first elastic member 32 can be made of elastic sheet, spring, rubber or sponge.

[0039] It is understandable that: only the positioning bead 31 may be arranged in the mounting hole; the positioning bead 31 always keeps in contact with the rotating disk; however, at this time, the friction between the positioning bead 31 and the rotating disk is relatively large, which is not conducive to the free rotation of the rotating disk.

[0040] The above-mentioned positioning structure is arranged between the rotating disk and the substrate 11; when the positioning structure is arranged between the rotating shaft and the substrate 11, a mounting hole can be arranged on the outer side of the rotating shaft, and a first elastic member 32 and a positioning bead 31 are arranged in the mounting hole, and two positioning recessed holes 111 are arranged on the side of the shaft hole; the working method is similar to the above, when the first reflector 2 or the second reflector 3 enters the reflecting position, a part of the positioning bead 31 enters the corresponding positioning recessed hole 111, and the positioning bead 31 forms a snap connection with the substrate 11.

[0041] See also Figure 7 , Figure 8 The transmission unit includes an intermediate shaft 15 and a second rotating shaft 18. The two ends of the intermediate shaft 15 are rotatably connected to the first rotating shaft 14 and the second rotating shaft 18 respectively. The intermediate shaft 15 can rotate freely relative to the first rotating shaft 14 and the second rotating shaft 18. A second elastic member 16 is connected between the first rotating shaft 14 and the second rotating shaft 18, and the second rotating shaft 18 drives the first rotating shaft 14 to rotate through the second elastic member 16.

[0042] The transmission unit of this embodiment adopts an intermediate shaft 15, a second rotating shaft 18 and a second elastic member 16. The second rotating shaft 18 is connected to the first rotating shaft 14 through the intermediate shaft 15. The second rotating shaft 18 and the first rotating shaft 14 can both rotate relative to the intermediate rotating shaft. Therefore, the rotation of the second rotating shaft 18 and the rotation of the first rotating shaft 14 are relatively free. In a specific implementation, bearings can be provided at both ends of the intermediate shaft 15, and then sleeved with the first rotating shaft 14 and the second rotating shaft 18; during operation, the second rotating shaft 18 rotates under an external force, and drives the first rotating shaft 14 to rotate through the second elastic member 16, so the first rotating shaft 14 has a delay, and the second elastic member 16 can store energy; when the first reflector 2 enters the reflecting position, the rotating disk is engaged with the positioning bead 31, the rotating disk stops rotating, and the first rotating shaft 14 also stops rotating; the rotation angle of the second rotating shaft 18 can be slightly ahead of the first rotating shaft 14, such as between 0-10 degrees, the second elastic member 16 still maintains a deformed state, and has a pulling force or a thrust on the first rotating shaft 14; and the pulling force or the thrust is not sufficient to drive the rotating disk and the positioning bead 31 to release the engagement. When the lens is switched, the second rotating shaft 18 rotates in the opposite direction. In the initial stage, the first rotating shaft 14 remains stationary due to the engagement between the rotating disk and the positioning bead 31. When the angle between the second rotating shaft 18 and the first rotating shaft 14 exceeds a certain degree, such as 30 degrees, the elastic force accumulated by the second elastic member 16 can overcome the engagement between the rotating disk and the positioning bead 31. The rotating disk rotates under the drive of the first rotating shaft 14, and the engagement between the rotating disk and the positioning bead 31 is released. When the second reflector 3 enters the reflecting position, the rotating disk is engaged with the positioning bead 31 again, the rotating disk stops rotating, and the first rotating shaft 14 also stops rotating; the rotation angle of the second rotating shaft 18 can be slightly ahead of the first rotating shaft 14 again, such as 0-10 degrees ahead, and the second elastic member 16 still maintains a deformed state, exerting a pulling force or a thrust on the first rotating shaft 14; similarly, the pulling force or the thrust is not enough to drive the rotating disk to release the engagement with the positioning bead 31. The rotation range of the second rotating shaft 18 can be greater than that of the first rotating shaft 14; for example, when the angle between the first reflector 2, the second reflector 3 and the center of the rotation circle is 180 degrees, when the first reflector 2 is in the reflecting position, the position of the first rotating shaft 14 corresponds to an angle of -90 degrees, and the position of the second rotating shaft 18 corresponds to an angle of -95 to -90 degrees; when the second reflector 3 is in the reflecting position, the position of the first rotating shaft 14 corresponds to an angle of 90 degrees, and the position of the second rotating shaft 18 corresponds to an angle of 90 to 95 degrees; the rotation angle of the first rotating shaft 14 is 180 degrees, and it is accurate; the rotation angle of the second rotating shaft 18 is 180-190 degrees, which is a relatively wide range of angles, which can reduce the control accuracy, thereby reducing the cost. The second elastic member 16 can be a torsion spring or the like.

[0043] To facilitate driving the second rotating shaft 18 to rotate, the transmission unit also includes a passive rotating member connected to the second rotating shaft 18 and an active driving member connected to the passive rotating member. The active driving member is connected to the power unit, and the power unit drives the active driving member to move and drives the passive rotating member to rotate.

[0044] When power is transmitted, the power unit drives the active driving member to move, and drives the second rotating shaft 18 to rotate through the passive rotating key, thereby driving the first rotating shaft 14 and the rotating disk to rotate, so as to switch the first reflector 2 and the second reflector 3 into the reflecting position. The passive rotating member can be a passive gear, and the active driving member can be an active gear or an active rack. The active gear or the active rack is meshed with the passive gear, and the power unit drives the active gear to rotate and drives the passive gear to rotate; or, the power unit drives the active rack to move and drives the passive gear to rotate; the passive rotating member can also be a passive synchronous pulley, and the active driving member is an active synchronous pulley, and the active synchronous pulley drives the passive synchronous pulley to rotate through a synchronous belt. The power unit can generally select a servo motor 84 or a cylinder, etc., which can be selected according to actual needs.

[0045] See also Figure 5 , Figure 6 The back of the substrate 11 is connected to a cover 19, which is sleeved outside the first rotating shaft 14 and the middle rotating shaft. The cover 19 is provided with a through hole matched with the second rotating shaft 18. The second rotating shaft 18 passes through the through hole and is rotatably connected to the cover 19. The outer end of the second rotating shaft 18 is connected to a rotating wheel 17, and a third elastic member 112 is connected between the rotating wheel 17 and the cover 19. When the first reflector 2 enters the reflecting position, the elastic potential energy of the third elastic member 112 is the smallest, and when the second reflector 3 enters the reflecting position, the elastic potential energy of the third elastic member 112 is the largest.

[0046] When the dual-light source laser engraving machine switches the light source, it also switches the lens, and some other related structures will also switch; in order to make these structures switch synchronously, a linkage structure is generally adopted to transmit kinetic energy through the transmission member 100; at the same time, due to the different positions, in order to facilitate the linkage, a contraction line is generally used for power transmission; in this embodiment, in order to facilitate the cooperation with the contraction line and realize power transmission, a cover body 19, a rotating wheel 17 and a third elastic member 112 are provided; when it is applied, one end of the contraction line can be wound and connected with the rotating wheel 17, and when there is power output, the contraction line moves and drives the rotating wheel 17 to rotate, and the third elastic member 112 is deformed.

[0047] For ease of understanding, the initial state can be set as follows: the first reflector 2 is located in the reflecting position, one end of the positioning bead 31 is inserted into one of the positioning recesses 111, and the position of the first rotating shaft 14 corresponds to an angle of -90 degrees; the angle corresponding to the position of the second rotating shaft 18 can be set to -95 degrees, and the second elastic member 16 retains a smaller elastic potential energy; the elastic potential energy of the third elastic member 112 is the smallest, and it still maintains the state of pulling the rotating wheel 17. At this time, the second elastic member 16 and the third elastic member 112 maintain a balance of force on the second rotating shaft 18. When the power unit acts on the contraction line, the contraction line moves outward to drive the rotating wheel 17 to rotate, and the rotating wheel 17 drives the second rotating shaft 18 to rotate, and the elastic potential energy of the third elastic member 112 gradually increases. The second rotating shaft 18 applies a pulling force to the first rotating shaft 14 through the second elastic member 16. The elastic potential energy of the second elastic member 16 first decreases to 0 and then gradually increases. When the elastic potential energy of the second elastic member 16 can overcome the clamping resistance between the positioning bead 31 and the rotating disk, the first rotating shaft 14 starts to drive the rotating disk to rotate; the elastic potential energy of the second elastic member 16 Gradually decreases to remain unchanged; when the positioning bead 31 cooperates with another positioning recessed hole 111 on the rotating disk, the first rotating shaft 14 and the rotating disk stop rotating, and the position of the first rotating shaft 14 corresponds to an angle of 90 degrees, that is, the first rotating shaft 14 and the rotating disk rotate 180 degrees; the rotating wheel 17 can continue to drive the second rotating shaft 18 to rotate until the position of the second rotating shaft 18 corresponds to an angle of 95 degrees, etc., that is, the second rotating shaft 18 rotates about 190 degrees, and the second elastic member 16 still maintains a small pulling force; the elastic potential energy of the third elastic member 112 reaches a maximum.

[0048] When the power unit no longer outputs power, the contraction line is released; the third elastic member 112 releases elastic potential energy and reduces deformation, driving the rotating wheel 17 to rotate in the opposite direction, and the rotating wheel 17 drives the second rotating shaft 18 to rotate in the opposite direction, and the second elastic member 16 also first decreases to 0 and then gradually increases until it is sufficient to overcome the clamping resistance between the positioning bead 31 and the rotating disk; the second elastic member 16 releases elastic potential energy, and the first rotating shaft 14 rotates with the second rotating shaft 18 and drives the rotating disk to rotate; when the positioning recessed hole 111 of the rotating disk and the positioning bead 31 are relatively matched again, the first rotating shaft 14 stops rotating, and the second rotating shaft 18 and the rotating wheel 17 continue to rotate a small angle under the reset power of the third elastic member 112, and the second elastic member 16 and the third elastic member 112 reach balance again; the second rotating shaft 18 and the rotating wheel 17 return to the initial state.

[0049] Secondly, the setting of the cover body 19 can assist in supporting the second rotating shaft 18. The second rotating shaft 18 can be directly plugged into the cover body 19. In order to facilitate the second rotating shaft 18 to rotate relative to the cover body 19, a bearing can be set on the cover body 19. The second rotating shaft 18 is sleeved with the bearing, which can not only play the effect of supporting the second rotating shaft 18, but also allow the second rotating shaft 18 to rotate freely. The rotating wheel 17 is located on the outside of the cover body 19, and a gap can be left between the rotating wheel 17 and the cover body 19. The third elastic member 112 can be a torsion spring or a tension spring; when it is a torsion spring, the torsion spring is sleeved with the second rotating shaft 18, the torsion spring is located in the gap, and one end is connected to the rotating wheel 17 or the second rotating shaft 18, and the other end is connected to the cover body 19; when it is a tension spring, the two ends of the tension spring are respectively connected to the cover body 19 and the rotating wheel 17. The third elastic member 112 always remains in a deformed state and always maintains a force on the rotating wheel 17. Make the rotating wheel 17 remain in a stable state.

[0050] To facilitate fixing the cover body 19 to the substrate 11 , folded edges 191 are provided on both sides of the cover body 19 , and the folded edges 191 are provided with connecting grooves 192 . The substrate 11 is provided with a connecting hole, and the connecting piece passes through the connecting groove 192 and extends into the connecting hole to connect with the substrate 11 .

[0051] The connecting piece may be a bolt or a screw, and the cover body 19 is fixedly connected to the base plate 11 via the connecting piece; at the same time, the position can be finely adjusted through the connecting groove 192, which is convenient to use.

[0052] Example 2: See Figures 1 to 3 as well as Fig. 9 A laser engraving machine comprises a frame 50, the frame 50 is provided with a first laser emitter 7 emitting a first laser, a second laser emitter 10 emitting a second laser, a front reflecting mirror group and an intermediate reflecting mirror 5; the front reflecting mirror comprises a first front reflecting mirror 6 for reflecting the first laser to the intermediate reflecting mirror 5, a second front reflecting mirror 9 for reflecting the second laser to the intermediate reflecting mirror 5 and a front moving mechanism 8 for driving the first front reflecting mirror 6 to move; the frame 50 is also provided with an XY moving mechanism 24, the XY moving mechanism 24 is connected to a laser engraving head 41 component 4 and drives the laser engraving head 41 component 4 to move, the laser engraving head 41 component 4 comprises the above-mentioned lens switching mechanism 1, and the laser engraving head 41 is connected to the lower end of the front surface of the substrate 11.

[0053] At present, when the dual-light source laser engraving machine is in use, the first laser is reflected to the intermediate reflector 5 through the first front reflector 6, and the second laser is reflected to the intermediate reflector 5 through the second front reflector 9; the first front reflector 6 is located between the second front reflector 9 and the intermediate reflector 5; after the lens switching mechanism 1 is set, the intermediate reflector 5 reflects the first laser or the second laser to the corresponding first reflector 2 or the second reflector 3; the first reflector 2 and the second reflector 3 switch to reflect the first laser and the second laser accordingly, thereby reducing the absorption rate of the first laser and the second laser and reducing the loss.

[0054] Secondly, during use, 1. When the first laser emitter 7 is working, the second laser emitter 10 stops working, the first front reflector 6 is located in the working position, the first reflector 2 is located in the reflecting position, the first front reflector 6 reflects the first laser to the intermediate reflector 5, the intermediate reflector 5 reflects the first laser to the first reflector 2, and the first reflector 2 reflects the first laser to the laser engraving head 41. 2. When the second laser emitter 10 is working, the first laser emitter 7 stops working, the front moving mechanism 8 moves the first front reflector 6 out of the working position, the lens switching mechanism 1 moves the first front reflector 6 out of the reflecting position, and the second front reflector 9 moves into the reflecting position; the second laser is projected onto the second front reflector 9 and is reflected to the intermediate reflector 5, the intermediate reflector 5 then reflects the second laser to the second reflector 3, and the second reflector 3 reflects the second laser to the laser engraving head 41.

[0055] See also Figure 3 The front moving mechanism 8 is connected to the lens switching mechanism 1 through a transmission member 100. The front moving mechanism 8 includes a front linear module and a moving block 87 connected to the front linear module. The front linear module drives the moving block 87 to move horizontally or vertically, and the moving block 87 is connected to the first front reflector 6; the transmission member 100 includes a wire core and a flexible wire sleeve. The flexible wire sleeve is sleeved outside the wire core, and both ends of the wire core extend out of the flexible wire sleeve. One end of the wire core is connected to the moving block 87, and the other end of the wire core is wound and connected to the rotating wheel 17.

[0056] The transmission member 100 is a transmission unit, and the front moving mechanism 8 is a power unit; the front moving mechanism 8 drives the first front reflector 6 to move, and also drives the lens switching mechanism 1 to move. In this embodiment, the front linear module is used to drive the moving block 87 to move, and the moving block 87 drives the first front reflector 6 to move linearly; it can be understood that: the front linear module can drive the moving block 87 to move horizontally in multiple directions such as horizontal, longitudinal, and lateral directions, and can also drive the moving block 87 to move in vertical, inclined and other directions. The front linear module can use a cylinder, a linear motor 84 and other structures. In practical applications, the front linear module is fixed to the frame 50, the laser engraving head 41 is connected to the XY moving mechanism 24, the XY moving mechanism 24 includes the Y moving mechanism 22 and the X moving mechanism 23 connected to the Y moving mechanism 22, the laser engraving head 41 is connected to the X moving mechanism 23, and the laser engraving head 41 can move in multiple directions such as the X and Y directions under the drive of the XY moving mechanism 24, so the distance between the moving block 87 and the laser engraving head 41 changes greatly, and also makes the distance between the moving block 87 and the lens switching mechanism 1 change greatly; the transmission member 100 is connected between the moving block 87 and the lens switching mechanism 1, how can the movement of the moving block 87 drive the lens switching mechanism 1? The lens switching of the switching mechanism 1; the transmission member 100 in this embodiment adopts a combination of a core wire and a flexible wire sleeve; wherein the flexible wire sleeve comprises at least two parts, one part is laid along the moving direction of the Y moving mechanism 22, and the other part is laid along the moving direction of the X moving mechanism 23. It can be understood that: an X drag chain and a Y drag chain can be set for convenient laying, and the flexible wire sleeve is connected to the drag chain; when the XY moving mechanism 24 drives the laser engraving head 41 to move, the corresponding X drag chain or / and Y drag chain moves with the laser engraving head 41; when the laser is switched, the moving block 87 pulls the wire core to move, the wire core moves relative to the flexible wire sleeve, the core wire pulls the rotating wheel 17 to rotate, and the lens switching mechanism 1 starts to switch the lens. When the laser is switched again, the moving block 87 releases the wire core, and the rotating wheel 17 is pulled to rotate and reset under the reset elastic force of the third elastic member 112, and the rotating wheel 17 pulls the wire core to move and reset. The overall structure is simple and convenient.

[0057] Secondly, in this embodiment, two Y moving mechanisms 22 are provided on the frame 50, and the X moving mechanism 23 is arranged between the two Y moving mechanisms 22. Both the Y moving mechanism 22 and the X moving mechanism 23 can adopt linear modules, such as: linear motor 84, lead screw nut, cylinder, etc. In this embodiment, a combination of a synchronous belt transmission mechanism and a slider is adopted. The synchronous belt transmission mechanism includes synchronous pulleys located on both sides, one of which is driven and connected to the servo motor 84, and the two synchronous pulleys are connected by a synchronous belt. One side of the synchronous belt is connected to the slider and drives the slider to move linearly. The flexible wire sleeve can be made of plastic tube, rubber tube, etc., and the wire core can be made of metal wire such as steel wire and iron wire.

[0058] See also Figure 1, Figure 2 A plurality of first intermediate reflectors 21 are arranged between the first laser emitter 7 and the first front reflector 6 , or / and a plurality of second intermediate reflectors are arranged between the second laser emitter 10 and the second front reflector 9 .

[0059] When setting the positions of the first laser emitter 7 and the second laser emitter 10, the positions can be set according to actual needs. A plurality of first intermediate reflectors 21 can be set between the first laser emitter 7 and the first front reflector 6 so that the first laser is projected onto the first front reflector 6 in a predetermined direction. Similarly, a plurality of second intermediate reflectors can be set between the second laser emitter 10 and the second front reflector 9 as needed.

[0060] See also Fig. 9 The front linear module includes a vertical plate 81 arranged vertically, a vertical guide rail 82 is arranged on the front side of the vertical plate 81, the vertical guide rail 82 is connected to a vertical slider 83, and the vertical slider 83 is connected to a moving block 87; the lower end of the vertical plate 81 is connected to a motor 84, the motor 84 is driven to be connected to a lead screw 85, the lead screw 85 is threadedly connected to a nut block 86, and the nut block 86 is connected to the moving block 87.

[0061] In this embodiment, the front linear module adopts a vertically arranged screw nut structure, and the motor 84 drives the screw 85 to rotate and drives the nut block 86 to move up and down. The nut block 86 is connected to the moving block 87 and drives the moving block 87 up and down, thereby achieving the purpose of driving the first front reflector 6 to move up and down. Secondly, by setting the vertical guide rail 82 and the vertical slider 83, the moving block 87 is pulled by the vertical slider 83 when moving up and down, and can move up and down accurately to avoid shaking. It can be understood that the screw nut structure can also be set horizontally to drive the moving block 87 to move horizontally. Of course, the moving block 87 can also be driven to rotate, such as by the cooperation of the rotating motor 84 and the rotating table to drive the moving block 87 to rotate.

[0062] Secondly, since the front linear module not only drives the first front reflector 6 to move, but also drives the lens switching mechanism 1 to move through the transmission member 100, the moving distance of the front linear module driving the moving block 87 is equal to the distance the core line needs to move, and corresponds to the angle of rotation of the rotating wheel 17; to ensure that the lens switching mechanism 1 can complete the switching action. Secondly, since the position of the second front reflector 9 has always been inconvenient, for the convenience of setting, the second front reflector 9 can be fixed to the vertical plate 81; of course, it can also be fixed to the frame 50.

[0063] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A lens switching mechanism, characterized in that: It includes: A rotating seat, with rotating arms extending outwards on both sides of the rotating seat, and the outer ends of the two rotating arms are respectively connected to a first reflector and a second reflector; The base plate is vertically arranged and has an axial hole at the upper end; A first rotating shaft, one end of which passes through the shaft hole and is fixedly connected to the rotating seat; the first rotating shaft is rotatably connected to the base plate, and the other end of the first rotating shaft is connected to the power unit through the transmission unit; The power unit drives the first rotating shaft to rotate through the transmission unit and drives the rotating seat to rotate, so that the first reflector and the second reflector can be switched into the reflecting position.

2. The lens switching mechanism according to claim 1, characterized in that: A positioning structure is provided between the rotating seat and the substrate or a positioning structure is provided between the first rotating shaft and the substrate. When the first reflector or the second reflector is located at the reflecting position, the rotating seat is engaged with the substrate or the first rotating shaft is engaged with the substrate.

3. The lens switching mechanism according to claim 2, characterized in that: The base plate is provided with a mounting hole, in which a first elastic member and a positioning bead are provided, and the positioning structure includes two positioning recessed holes provided on the back of the rotating disk, and the two positioning recessed holes correspond one to one with the two rotating arms; when the first reflector enters the reflecting position, a part of the positioning bead enters one of the positioning recessed holes under the push of the first elastic member; when the second reflector enters the reflecting position, a part of the positioning bead enters the other positioning recessed hole under the push of the first elastic member.

4. The lens switching mechanism according to claim 1, 2 or 3, characterized in that: The transmission unit includes an intermediate shaft and a second rotating shaft. The two ends of the intermediate shaft are respectively rotatably connected to the first rotating shaft and the second rotating shaft. The intermediate shaft can rotate freely relative to the first rotating shaft and the second rotating shaft. A second elastic member is connected between the first rotating shaft and the second rotating shaft, and the second rotating shaft drives the first rotating shaft to rotate through the second elastic member.

5. The lens switching mechanism according to claim 4, characterized in that: The transmission unit also includes a passive rotating member connected to the second rotating shaft and an active driving member connected to the passive rotating member. The active driving member is connected to the power unit. The power unit drives the active driving member to move and drives the passive rotating member to rotate.

6. The lens switching mechanism according to claim 5, characterized in that: A cover body is connected to the back side of the substrate, and the cover body is sleeved outside the first rotating shaft and the middle rotating shaft. The cover body is provided with a through hole matching the second rotating shaft, and the second rotating shaft passes through the through hole and is rotatably connected to the cover body. A rotating wheel is connected to the outer end of the second rotating shaft, and a third elastic member is connected between the rotating wheel and the cover body. When the first reflector enters the reflecting position, the elastic potential energy of the third elastic member is the smallest, and when the second reflector enters the reflecting position, the elastic potential energy of the third elastic member is the largest.

7. A laser engraving machine, comprising a frame, the frame is provided with a first laser emitter for emitting a first laser, a second laser emitter for emitting a second laser, a front reflector group and an intermediate reflector; the front reflector comprises a first front reflector for reflecting the first laser to the intermediate reflector, a second front reflector for reflecting the second laser to the intermediate reflector and a front moving mechanism for driving the first front reflector to move; the frame is also provided with an XY moving mechanism, the XY moving mechanism is connected to a laser engraving head assembly and drives the laser engraving head assembly to move, characterized in that: The laser engraving head assembly includes the lens switching mechanism according to claim 6, and the laser engraving head is connected to the lower end of the front surface of the substrate.

8. The laser engraving machine according to claim 7, characterized in that: The front moving mechanism is connected to the lens switching mechanism through a transmission member, and the front moving mechanism includes a front linear module and a moving block connected to the front linear module. The front linear module drives the moving block to move horizontally or vertically, and the moving block is connected to the first front reflector; the transmission member includes a wire core and a flexible wire sleeve, the flexible wire sleeve is sleeved outside the wire core, and both ends of the wire core extend out of the flexible wire sleeve, one end of the wire core is connected to the moving block, and the other end of the wire core is wound and connected to the rotating wheel.

9. The laser engraving machine according to claim 7, characterized in that: A plurality of first intermediate reflectors are arranged between the first laser emitter and the first front reflector, or / and a plurality of second intermediate reflectors are arranged between the second laser emitter and the second front reflector.

10. The laser engraving machine according to claim 8, characterized in that: The front linear module includes a vertical plate arranged vertically, a vertical guide rail is arranged on the front side of the vertical plate, the vertical guide rail is connected to a vertical slider, and the vertical slider is connected to a moving block; a motor is connected to the lower end of the vertical plate, the motor drive is connected to a lead screw, the lead screw is threadedly connected to a nut block, and the nut block is connected to the moving block.

Images