Electric shielding type lifting structure and marking machine

Abstract

The invention discloses an electric shielding type lifting structure and a marking machine in the technical field of laser processing equipment, and the electric shielding type lifting structure comprises a lifting shell main body, a shielding structure in the lifting shell main body, a lifting structure and a connecting plate outside the lifting shell main body; a hollow groove in the vertical direction is formed in the front surface of the lifting shell body, the shielding structure comprises a strip-shaped curtain, a strip-shaped curtain supporting structure and a connecting plate fixing structure fixed to the strip-shaped curtain, and the connecting plate fixing structure is driven by the lifting structure to ascend and descend in the lifting shell body in a reciprocating mode. The connecting plate fixing structure is fixedly connected with the connecting plate outside the hollowed-out groove, the end of the strip-shaped curtain is supported on the strip-shaped curtain supporting structure, and when the connecting plate fixing structure reciprocates in the range of the hollowed-out groove, the strip-shaped curtain reciprocates under the supporting of the strip-shaped curtain supporting structure and shields the hollowed-out groove. According to the scheme, the problems of space structure and wiring in the prior art are solved, and the beneficial effects of reducing the size and facilitating wiring are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of laser processing equipment, and specifically to an electric shielding lifting structure and a marking machine. Background Art

[0002] At present, the shielding lifting structure of laser marking machines on the market can be roughly divided into two categories:

[0003] One is an open type, that is, the lifting connection or the left and right sides are exposed and hollowed out, and the interior can be seen directly from the outside. The structure is simple, but it is exposed to the outside for a long time, and dust and foreign objects are easy to enter and cause damage to the lifting components.

[0004] One is dustproof, that is, it is shielded with an accordion telescopic cover or a metal sheet to achieve a dustproof shielding effect. For example, a fiber laser marking machine disclosed in the patent document with the authorization announcement number CN220093470U has an accordion cover connected to the upper and lower ends of the lifting seat respectively, and the accordion cover is slidably connected to the inner wall of the movable opening. Under the action of the accordion cover, the inside of the frame and the workbench are well separated to prevent debris from floating into the frame during laser processing and affecting the cleanliness of the frame and thus affecting normal operation. The accordion telescopic cover uses its elasticity to achieve the effect of expansion and contraction during the lifting process; the metal sheet is mainly directly shielded or the metal sheet is stationary, and the lifting structure slides in it for shielding. Disadvantages: high requirements on the size of the structural space, the shielding parts cannot move together, and it is inconvenient to route the optical fiber line, etc. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present application provides an electric shielding lifting structure and a marking machine to solve the problem that the shielding structure of the prior art cannot move with the laser head and is inconvenient for wiring.

[0006] To achieve the above objectives, this application is implemented through the following technical solutions:

[0007] An electric shielding lifting structure comprises a lifting shell body, a shielding structure inside the lifting shell body and a connecting plate outside the lifting shell body, wherein a vertical hollow groove is provided on the front surface of the lifting shell body, and also comprises a lifting structure, wherein the shielding structure comprises a strip curtain, a strip curtain supporting structure and a connecting plate fixing structure fixed on the strip curtain, wherein the connecting plate fixing structure reciprocates and rises and falls inside the lifting shell body under the drive of the lifting structure, the connecting plate fixing structure is fixedly connected to the connecting plate outside the hollow groove, an end portion of the strip curtain is supported on the strip curtain supporting structure, and when the connecting plate fixing structure reciprocates within the range of the hollow groove, the strip curtain reciprocates and shields the hollow groove under the support of the strip curtain supporting structure.

[0008] Preferably, the connecting plate fixing structure comprises a fixing block and an adapter plate, the strip curtain is clamped and fixed between the fixing block and the adapter plate, and the connecting plate is fixed in front of the adapter plate.

[0009] Preferably, the strip curtain uses a soft belt, and the upper and lower ends of the strip curtain are supported on a strip curtain support structure. The strip curtain support structure uses a roller structure including a roller. The soft belt is an annular closed belt. The soft belt and the rollers on both sides serving as pulleys form a flat belt parallel transmission, and the soft belt uses a tensioning structure to provide tensioning force.

[0010] Preferably, the soft belt is made of leather.

[0011] Preferably, the lifting structure uses a stepper motor screw lifting structure, which includes a stepper motor, a screw, a nut seat, and a guide shaft. The stepper motor has its shaft vertically installed in the lifting shell body, the screw is vertically installed on the stepper motor shaft and rotates under the driving force of the stepper motor shaft, the nut seat is threadedly connected to the screw and is driven to lift when the screw rotates, the nut seat is fixedly connected to the connecting plate fixing structure, the guide shaft is fixed to the lifting shell body from both sides of the screw in parallel with the screw, and the guide shaft passes through the nut seat and slides in the oil-free bushing installed on the nut seat.

[0012] Preferably, the roller structure also includes bearings and locking screws. The roller structure is transversely fixed in the lifting shell body through sheet metal brackets. Two pairs of sheet metal brackets are transversely fixed at the upper and lower ends of the strip curtain in the lifting shell body. The locking screws are fixed between the front ends of each pair of sheet metal brackets. The roller is rotatably fixed on the locking screws through bearings at both ends. Both ends of the roller are provided with roller groove features facing the outer end of the roller toward the inner side of the strip curtain, and both sides of the strip curtain are stuck in the roller groove features.

[0013] Preferably, the roller is made of nylon.

[0014] Preferably, the tensioning structure uses a spring-type tensioning structure, which includes a spring tensioning sheet metal frame, a spring, a spring fixing block, and a spring moving rod. The spring fixing block is fixed to the rear side of the belt in the lifting shell body, and a spring groove is provided in the spring fixing block. One end of the spring is installed in the spring groove, and the spring moving rod passes through the spring in the spring groove from the rear side of the spring fixing block and is fixedly connected to the spring tensioning sheet metal frame. The other end of the spring is pressed against the back side of the spring tensioning sheet metal frame. Forward bends are provided on both sides of the spring tensioning sheet metal frame. The roller structure is transversely fixed between the bends of the spring tensioning sheet metal frame, and the roller of the roller structure presses on the rear belt of the soft belt to provide tensioning force.

[0015] Preferably, a harness hole is provided on the surface of the strip curtain covering the hollow groove.

[0016] Based on the same inventive concept, the present application also discloses a marking machine, including a laser head and a wire harness. The wire harness is connected to the rear side of the laser head and includes the electric shielding type lifting structure as described in the foregoing claims. The laser head is mounted on a connecting plate.

[0017] Compared with the prior art, the beneficial effects of this solution are as follows: The electric shielding type lifting structure of the present application uses a reciprocating belt to run and shield the hollow part of the semi-sealed housing body. The spring-type tensioning structure ensures the tension adjustment of the belt after long-term operation, keeping the belt in a taut state at all times. The semi-sealed housing body solves the problems of spatial structure and wire routing. The solution improves the defect that the shielding parts cannot move together. The belt-type reciprocating shielding structure can perfectly shield the hollow groove of the semi-sealed housing body during the marking lifting process, ensuring that the hollow can be completely shielded and having a good dust-proof effect. The belt reciprocating type borrows the excellent stepping motor screw lifting structure, without the need for a new mechanical drive, ensuring accurate position control, high stability, and fast response speed. It can not only drive the belt to reciprocate to meet the shielding requirement but also accurately adjust the marking lifting distance. The belt can be perforated, and at this time, the wire harness of the front laser head or other wire harnesses can conveniently pass through the holes in the belt, realizing the hiding of the wire harness and convenient wire routing. The high-integration design of the coaxial direct-drive stepping motor screw, with innovative laminated layout and three-dimensional assembly technology, for example, the front belt-type reciprocating shielding structure is connected to the transmission lifting structure through a fixing block, and the belt roller is arranged in the upper and lower gaps of the lifting structure, making the most of the limited space and making the structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic three-dimensional structure diagram of an embodiment of the electric shielding type lifting structure of the present solution with the wire harness of the laser head passing inside;

[0019] Figure 2 Schematic three-dimensional structure diagram of an embodiment of the laser head mounted on the electric shielding type lifting structure with the wire harness passing inside;

[0020] Figure 3 Schematic three-dimensional structure diagram inside the lifting housing body of an embodiment of the electric shielding type lifting structure of the present solution with the wire harness of the laser head passing inside;

[0021] Figure 4 is Figure 3 front view;

[0022] Figure 5 is Figure 4 A-A sectional view;

[0023] Figure 6Front view of the lifting structure of the electric shielding type in this solution, with the connecting plate hidden inside the lifting housing main body and the laser head wire harness running externally;

[0024] Figure 7 For Figure 6 A - A cross - sectional view;

[0025] Figure 8 For Figure 4 Front view of the stepping motor screw lifting structure behind the belt;

[0026] Figure 9 Side view structure diagram of the laser head installation in the lifting structure of the electric shielding type in this solution with the wire harness running internally;

[0027] Figure 10 For Figure 9 A - A cross - sectional view;

[0028] Figure 11 Stereo schematic diagram of the belt clamping structure of the embodiment of the laser head wire harness running internally in the lifting structure of the electric shielding type in this solution;

[0029] Figure 12 For Figure 4 B - B cross - sectional view;

[0030] Figure 13 C - C cross - sectional view of another embodiment of the lifting structure of the electric shielding type in this solution Figure 4 from a certain perspective;

[0031] Among them, 1 - lifting housing main body, 2 - shielding structure, 22 - belt, 221 - belt opening, 23 - spring - type tensioning structure, 231 - spring tensioning sheet metal frame, 232 - spring, 233 - spring fixing block, 234 - spring moving rod, 24 - drum structure, 241 - drum, 2411 - drum grooving feature, 242 - bearing, 243 - locking screw, 244 - sheet metal bracket, 25 - coiled tube, 3 - connecting plate, 4 - laser head, 5 - fixed seat, 6 - wire harness, 7 - stepping motor screw lifting structure, 71 - stepping motor, 72 - screw, 73 - fixed block, 74 - adapter plate, 741 - adapter plate fixing screw, 75 - nut seat, 76 - guide shaft, 77 - coupling, 78 - oil - free bushing, 79 - travel switch. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0033] In view of the deficiencies of the prior art, the present application makes a technological innovation based on the existing shielding lifting structure. The reciprocating belt 22 is used to run through the hollow part of the shielding semi-sealed shell body, solving the problems of spatial structure and wire routing. This solution provides an electric shielding lifting structure, which includes a lifting shell body 1, a shielding structure 2 inside the lifting shell body 1, and a connecting plate 3 outside the lifting shell body 1. A fixed seat 5 is installed below the lifting shell body 1. A vertical hollow groove is provided on the front surface of the lifting shell body 1. The lifting structure is also included. The shielding structure 2 includes a strip curtain, a strip curtain support structure, and a connecting plate fixing structure fixed on the strip curtain. The connecting plate fixing structure reciprocates up and down in the lifting shell body 1 under the drive of the lifting structure. The connecting plate fixing structure is fixedly connected to the connecting plate 3 outside the hollow groove. The end of the strip curtain is supported on the strip curtain support structure. When the connecting plate fixing structure reciprocates within the range of the hollow groove, the strip curtain reciprocates under the support of the strip curtain support structure and shields the hollow groove. This solution can shield the internal structure, making the appearance more integral, and can also prevent foreign objects from entering the structure and causing damage to the lifting.

[0034] In this embodiment, the connecting plate fixing structure includes a fixing block 73 and a transfer plate 74. The strip curtain is fixed between the fixing block 73 and the transfer plate 74. Specifically, a concave pit is provided on the front surface of the fixing block 73, and a protruding part corresponding to the size of the concave pit is provided on the rear surface of the transfer plate 74. Corresponding holes are opened at the positions of the strip curtain corresponding to the size of the concave pit. The protruding part of the transfer plate 74 is placed into the concave pit, and the hole positions are aligned. Two transfer plate fixing screws 741 pass through the transfer plate 74 and the strip curtain from the front in sequence and are threadedly fixed on the fixing block 73. The fixing block 73 and the transfer plate 74 firmly clamp the strip curtain. The connecting plate 3 is fixed in front of the transfer plate 74 by four screws. In addition to the above method, the connecting plate fixing structure can also use other methods such as clamping teeth to fix the strip curtain and buckles to fix the connecting plate 74.

[0035] In this embodiment, the strip curtain uses a soft belt, and the upper and lower ends of the strip curtain are supported on a strip curtain support structure. The strip curtain support structure uses a roller structure 24 including a roller 241. The soft belt is an annular closed belt, and the soft belt forms a flat belt parallel drive with the rollers 241 on both sides acting as pulleys. The strip curtain can also use a hard belt such as sheet metal, such as beryllium bronze, phosphor bronze, or some stainless steel with inherent elasticity. In this embodiment, the soft belt material uses leather to form a belt 22. In addition to leather, other rollable materials such as cloth can also be used. Except for the shielding part of the front belt, the middle vertical part of the other parts of the belt 22 can be hollowed out. The roller 241 is made of nylon, which has high hardness and strength, is not easily worn, has a high wear resistance, and extends the service life of the roller. At the same time, nylon has good self-lubricating effect, can reduce the friction between the roller and the belt, and enables smooth operation. The density of nylon is relatively small, and the weight is light, which can reduce the overall weight of the equipment. At the same time, the nylon roller has certain elasticity, shock absorption performance and self-lubrication, can absorb and buffer the impact force during operation, reduce mutual friction, and enable low or noiseless operation. The reciprocating belt 22 is in a surrounding relationship with the roller 241.

[0036] In this embodiment, the lifting structure uses a stepping motor screw lifting structure 7, and the stepping motor screw lifting structure 7 includes a stepping motor 71, a screw 72, a nut seat 75, and a guide shaft 76. The stepping motor 71 is vertically installed in the lifting housing main body 1. The screw 72 is vertically installed on the shaft of the stepping motor 71 through a coupling 77 and rotates under the driving force of the shaft of the stepping motor 71. The nut seat 75 is threadedly connected to the screw 72 and is driven to lift when the screw 72 rotates. The nut seat 75 is fixedly connected to the connecting plate fixing structure. In this embodiment, a concave pit is provided on the front surface of the fixing block 73. Four screws pass through the concave pit on the front of the fixing block 73 and are fixedly connected to the front of the nut seat 75 on the back. The concave pit is also used for positioning the adapter plate 74 and limiting the belt 22. The two guide shafts 76 are fixedly installed on the fixing structure of the inner back plate of the lifting housing main body 1 in parallel with the screw 72 on both sides of the screw 72, providing a guarantee of perpendicularity, so that the nut seat 75 travels in a straight line without skewing. The two guide shafts 76 pass through the nut seat 75 and slide in the oil-free bushings 78 installed on both sides of the nut seat 75 body, mainly to provide lubricated movement for the guide shafts 76. The start and end points of the stepping motor 71 are controlled by a travel switch 79. When the nut seat 75 runs to the positions of the two travel switches 79 installed vertically on the inner back plate of the lifting housing main body 1, the motor drive stops, which is controlled by a software signal. Thanks to the good stability and fast response speed of the stepping motor screw lifting structure 7, the belt 22 is evenly and smoothly wound around the roller 241. The belt 22 is close to the inner surface of the hollow groove, and the vibration during operation is small, reducing problems such as poor shielding due to shaking or jitter. This structure highly integrates the driving, transmission, and guiding functions into the same compact unit. Compared with the traditional belt drive structure, the overall volume is reduced by 40%, the installation space requirement is reduced by 50%, and the structural complexity is reduced by 30%, effectively reducing the assembly error. And it can be installed conveniently as an independent module, and the installation process is simpler and faster, which can save installation time and cost. When designing, space factors are fully considered, and through reasonable layout and design, the reciprocating belt 22, roller 241, etc. are combined. By using the travel switch 79, it changes from the manual mode of an ordinary hand crank on the market to the motor drive mode, with a fast response speed and high precision, which can ensure the high-precision marking and focusing requirements. The screw 72 is used for transmission and lifting, with high rigidity and stability, and can withstand a large axial load. And the screw 72 thread has a self-locking function to prevent self-descent due to its own gravity in case of emergencies and avoid accidents.

[0037] In this embodiment, the drum structure 24 includes, in addition to the drum 241, a bearing 242 and a locking screw 243. The drum structure 24 is horizontally fixed on the back plate inside the lifting housing body 1 through a sheet metal bracket 244. Two pairs of the sheet metal brackets 244 are horizontally fixed at the upper and lower ends of the strip curtain inside the lifting housing body 1. The locking screw 243 is fixed between the front ends of each pair of sheet metal brackets 244. The drum 241 is rotatably fixed on the locking screw 243 through bearings 242 at both ends. In order to prevent the belt 22 from slipping and running off track, drum grooving features 2411 facing the outside of the drum 241 are provided at both ends of the drum 241. The grooving features 2411 are located at both ends of the drum 241, and the groove openings face the inside of the strip curtain. Both sides of the strip curtain are stuck in the drum grooving features 2411, which can also be used to correct the position of the belt 22 and prevent the belt 22 from being worn due to the characteristics of the nylon material.

[0038] During the long-term reciprocating movement of the belt 22, the belt 22 has the drawback of being loose. At this time, there will be a state where it cannot be tightened tightly, which is likely to cause foreign objects to enter the hollow groove or the occlusion is incomplete. At this time, a compact spring-type tensioning structure is designed. By using the spring tensioning sheet metal frames 231 on both sides of the roller 241, the elasticity of the spring 232 is utilized in a limited and narrow space to keep the roller 241 always tighten the belt 22. The roller 241 can elastically adjust the contacting roller 241 according to the tightness of the belt 22 so that it can always tighten the belt 22. In this embodiment, the spring-type tensioning structure is installed at a position behind the reciprocating belt 22. The spring-type tensioning structure includes a spring tensioning sheet metal frame 231, a spring 232, a spring fixing block 233, and a spring moving rod 234. The spring fixing block 234 is fixed on the back plate at the rear side of the belt 22 in the lifting housing main body 1. A spring groove is provided in the spring fixing block 233. One end of the spring 232 is installed in the spring groove. The spring moving rod 234 passes through the spring 232 in the spring groove from the rear side of the spring fixing block 233 and is fixedly connected to the spring tensioning sheet metal frame 231. In this embodiment, a threaded column is provided at the front end of the spring moving rod 234, and the spring moving rod 234 is screwed into the threaded hole at the corresponding position of the spring tensioning sheet metal frame 231 using the threaded column. The other end of the spring 232 abuts against the back surface of the spring tensioning sheet metal frame 231. Forward bends are provided on both sides of the spring tensioning sheet metal frame 231. The roller structure 24 is horizontally fixed between the bends of the spring tensioning sheet metal frame 231. This is an integral whole and needs to be installed in advance. The roller of the roller structure 24 presses on the rear belt of the belt 22 to provide a tensioning force. The spring-type tensioning structure relies on the elasticity of the spring 232 to make the roller 241 contact the belt 22, and there is no noise in this process. The tensioning structure is not limited to the spring type, and a slider type or a torsion spring swing arm type can also be used. Connect the tensioning roller 241 to the swing arm of the torsion spring, and utilize the resilience of the torsion spring to make the swing arm of the tensioning roller 241 perform a rotational movement, so that the tensioning roller 241 makes a contact sliding with the belt 22, and the wear degree is smaller.

[0039] When wiring is required, a wire harness hole is opened on the surface of the strip curtain covering the hollow groove. In this embodiment, belt openings 221 are opened above the fixing block 73 and the adapter plate 74 of the belt 22. Pass the wire harness 6 through the belt openings 221, and then it can enter the inside of the lifting housing main body 1. At this time, fix the wire harness 6 and the nut seat 75 together by bonding or bundling, etc., and then they can run together. Just leave a moving distance length at the bottom.

[0040] In addition to using the roller structure 24, other structures can also be used for the belt curtain support structure. For example, when a hard belt is used for the belt curtain, the belt curtain can use an open-loop belt instead of a closed-loop belt, and is made into an opening and closing rolling form. That is, when using a hard curtain, both ends are wound around the winding tube 25. During the lifting and lowering process, the wound hard belt performs an action similar to that of a rolling shutter door. During the rising process, one end is repeatedly wound around the winding tube 25, and the other end is continuously loosened. Vice versa during the lowering process. When using this solution, a winding tube motor can be set on each of the upper and lower winding tubes 25. At this time, the stepping motor screw lifting structure 7 can be not used, and the winding tube motor can be directly used as the lifting structure for lifting and lowering control. When lifting, the winding tube motor rotates forward, and when lowering, the winding tube motor rotates in reverse. When there is enough space below the connecting plate fixing structure in the lifting housing body 1, the lower winding tube 25 and the winding tube motor can also be omitted, and the guide rails on both sides of the hard belt can be arranged inside the hollow groove, and only the winding tube 25 and the winding tube motor at one end of the belt curtain are used.

[0041] Based on the same inventive concept, the present application also discloses a marking machine, including a laser head 4 and a wire harness 6. The wire harness 6 is connected to the rear side of the laser head 4 and includes the aforementioned electric shielding type lifting structure. The connecting plate 3 is L-shaped in this embodiment, and the laser head 4 is installed on the long side of the connecting plate 3. The reciprocating movement of the shielding of the belt 22 mainly relies on the driving of the screw 72 by the stepping motor 71 to perform reciprocating movement. The belt 22 is wound around the roller 241 to give direction limitation and sliding. The fixing block 73 is first connected to the nut seat 75 by screws. The fixing block 73 and the adapter plate 74 sandwich the belt 22 in the middle through the adapter plate fixing screw 741, so that the belt 22 and the nut seat 75 move up and down together, so as to realize that when the stepping motor 71 drives the screw 72 to reciprocate, the belt 22 can be driven to reciprocate to shield the hollow groove. The belt 22 is divided into two types: with holes and without holes, mainly corresponding to two situations where the wire harness 6 of the laser head 4 passes inside or outside the lifting housing body 1. The biggest advantage of using this solution is that it can be compatible with two placement methods of the wire harness 6 of the laser head 4 inside and outside the liftable housing body 1. And when the wire harness 6 of the laser head 4 passes inside the liftable housing body 1, it can perfectly shield the hollow groove of the liftable housing body 1, and the belt 22 can also perform reciprocating shielding without being affected, making its appearance more beautiful and the structure more compact.

[0042] In the description of this specification, the schematic diagrams in the drawings highlight the main features and key parts of the figures, appropriately simplifying or omitting details. Therefore, they do not represent the proportional and dimensional relationships in reality. The descriptions with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0043] As described above, it is only a preferred specific implementation manner of this solution, but the scope of protection required by this solution is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application, according to the technical solution and inventive concept of this application, makes equivalent substitutions or changes, and should be covered by the protection scope of this application.

Claims

1. An electric shielding lifting structure, comprising a lifting housing main body (1), a shielding structure (2) inside the lifting housing main body (1), and a connecting plate (3) outside the lifting housing main body (1). A vertically oriented hollow groove is provided on the front surface of the lifting housing main body (1). It is characterized in that: It further includes a lifting structure. The shielding structure (2) includes a strip curtain, a strip curtain support structure, and a connecting plate fixing structure fixed on the strip curtain. Driven by the lifting structure, the connecting plate fixing structure reciprocates up and down within the lifting housing main body (1). The connecting plate fixing structure is fixedly connected to the connecting plate (3) outside the hollow slot. The end of the strip curtain is supported on the strip curtain support structure. When the connecting plate fixing structure reciprocates within the range of the hollow slot, the strip curtain reciprocates under the support of the strip curtain support structure and shields the hollow slot.

2. The electric shading lifting structure according to claim 1, characterized in that: The connecting plate fixing structure includes a fixing block (73) and an adapter plate (74). The strip curtain is fixed between the fixing block (73) and the adapter plate (74), and the connecting plate (3) is fixed in front of the adapter plate (74).

3. The electric shielding type lifting structure according to claim 1, characterized in that: The strip curtain uses a soft belt. The upper and lower ends of the strip curtain are supported on the strip curtain support structure. The strip curtain support structure uses a roller structure (24) including a roller (241). The soft belt is an annular closed belt. The soft belt forms a flat belt parallel drive with the rollers (241) serving as belt pulleys on both sides. The soft belt uses a tensioning structure to provide tension.

4. The electric shading type lifting structure according to claim 3, characterized in that: The soft belt is made of leather to form a belt (22).

5. The electric shading lifting structure according to claim 1, characterized in that: The lifting structure uses a stepping motor screw lifting structure (7). The stepping motor screw lifting structure (7) includes a stepping motor (71), a screw (72), a nut seat (75), and a guide shaft (76). The stepping motor (71) is vertically installed in the lifting housing main body (1). The screw (72) is vertically installed on the shaft of the stepping motor (71) and rotates under the driving force of the shaft of the stepping motor (71). The nut seat (75) is threadedly connected to the screw (72) and is driven to lift when the screw (72) rotates. The nut seat (75) is fixedly connected to the connecting plate fixing structure. The guide shaft (76) is fixedly installed on the lifting housing main body (1) in parallel with the screw (72) on both sides of the screw (72). The guide shaft (76) passes through the nut seat (75) and slides within an oil-free bushing (78) installed on the nut seat (75).

6. The electric shielding type lifting structure according to claim 3, characterized in that: The roller structure (24) further includes a bearing (242) and a locking screw (243). The roller structure (24) is horizontally fixed in the lifting housing main body (1) through a sheet metal bracket (244). Two pairs of the sheet metal brackets (244) are horizontally fixed at the upper and lower ends of the strip curtain inside the lifting housing main body (1). The locking screw (243) is fixed between the front ends of each pair of sheet metal brackets (244). The roller (241) is rotatably fixed on the locking screw (243) through bearings (242) at both ends. Groove features (2411) are provided at both ends of the roller (241) facing the outer ends of the roller (241) and extending towards the inside of the strip curtain. The two sides of the strip curtain are stuck in the groove features (2411).

7. The electric shading type lifting structure according to claim 3, wherein: The roller (241) is made of nylon.

8. The electric shading type lifting structure according to claim 3, characterized in that: The tensioning structure uses a spring-type tensioning structure, which includes a spring tensioning sheet metal frame (231), a spring (232), a spring fixing block (233), and a spring moving rod (234). The spring fixing block (234) is fixed to the rear side of the belt (22) inside the lifting housing main body (1). A spring groove is provided in the spring fixing block (233). One end of the spring (232) is installed in the spring groove. The spring moving rod (234) passes through the spring (232) in the spring groove from the rear side of the spring fixing block (233) and is fixedly connected to the spring tensioning sheet metal frame (231). The other end of the spring (232) abuts against the back of the spring tensioning sheet metal frame (231). Forward bends are provided on both sides of the spring tensioning sheet metal frame (231). The drum structure (24) is horizontally fixed between the bends of the spring tensioning sheet metal frame (231). The rollers (241) of the drum structure (24) press on the rear belt of the soft belt to provide a tensioning force.

9. The electric shielding type lifting structure according to any one of claims 1 to 8, characterized in that: Wire harness holes are formed on the surface of the strip curtain covering the hollow groove.

10. A marking machine, comprising a laser head (4) and a wire harness (6), characterized in that: The wire harness (6) is connected to the rear side of the laser head (4). It is characterized in that it includes a lifting structure of the electric shielding type as described in any one of claims 1 to 9, and the laser head (4) is installed on the connecting plate (3).

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