Protection method and apparatus for laser device

Abstract

A protection method and apparatus for a laser device, the protection method for a laser device comprising: connecting a laser device (2) to a protection apparatus such that a laser emitted by the laser device (2) enters the protection apparatus and performs laser engraving on an object to be engraved in the protection apparatus; and, on the basis of the height of said object and the laser device (2), the protection apparatus adjusting an engraving position such that said object is within a range of an engraving focal length. The laser device (2) is connected to the protection apparatus from the outside of the protection apparatus and emits an engraving laser into the protection apparatus to perform laser engraving on said object.

Description

Method and device for protecting a laser device TECHNICAL FIELD

[0001] The present application relates to the field of protection of laser devices, and in particular to a method and device for protecting a laser device. BACKGROUND

[0002] With the development of laser technology, laser engraving technology has gradually become popular. Generally speaking, the types of lasers include gas lasers, chemical substance lasers, metal vapor lasers, solid-state lasers, and semiconductor lasers. The principle of laser engraving is to use a laser as a heat source to focus the light beam on the surface of the workpiece in a very short time and release energy. The released energy can generate heat energy on the surface of the workpiece, and the workpiece is locally melted, and by moving the position of the laser beam, the purpose of engraving the workpiece is achieved. The current laser device lacks effective protection mechanism in the process of use, and the laser is exposed, which can easily cause harm to people and cause safety hazards; with the increasingly stringent requirements of the European Union and the United States on laser engraving machine compliance, laser engraving products without full-enclosed compliance protection cover may not be allowed to be sold on the market. The laser device equipped with a protection mechanism is often placed inside the protection device, resulting in a large size of the protection device, which is not convenient to carry and the replacement of the laser device is not convenient.

[0003] Chinese patent publication No. CN117020426A discloses a small portable laser engraving device with a protective cover, comprising a device box, a pin hole, a base, a Y-axis assembly, an X-axis assembly, a protective cover, a device bin and a servo motor, the bottom of the device box is provided with a base, the upper surface of the base is provided with a travel rod at each corner, the device box is provided with a pin hole at each corner, and the inner wall of the top of the device bin is embedded with an operation panel and a data interface module; a receiving groove is formed at the edge of the lower surface of the device box, and a protective cover is arranged inside the receiving groove, an X-axis assembly is installed at the lower end of the device box, a Y-axis assembly is arranged between the X-axis assemblies, and a laser engraving assembly is installed at the middle position of the Y-axis assembly. The base and the device box can be flexibly folded, the overall volume of the device can be reduced, the flexible lifting protective cover can ensure the non-interference of the laser engraving space, and the volume is smaller, which is more convenient to carry. Although the protective cover of this patent can protect the laser, the laser can only move in the X-axis and Y-axis directions, and the laser focal point is fixed and cannot adapt to different heights of the engraved object or different types of laser engraving devices.

[0004] CN220863025U discloses a high-safety laser engraving machine, which comprises a honeycomb plate module 1 for positioning products, a support frame 2 arranged on the periphery of the honeycomb plate module 1, a laser module 3 arranged on the support frame 2 in a manner capable of moving in an XY plane and used for engraving the products, and a transparent protective cover 4 arranged on the support frame 2 and used for filtering laser. An upper end surface of the transparent protective cover 4 is hingedly provided with an openable cover plate 40, and a first micro switch 400 for opening the cover plate 40 to control the laser module 3 to stop working is arranged on the transparent protective cover 4. The transparent protective cover 4 is arranged on the support frame 2, and the user can observe the laser processing in real time, and the stimulation and damage of laser to the eyes can be filtered out, so that the safety of laser engraving is greatly improved. The laser engraving machine is completely placed in the protective cover for laser protection, so that the protective equipment is large in size and inconvenient to carry, and the laser engraving machine needs to be opened for replacement, which is inconvenient. SUMMARY

[0005] The technical problem to be solved by the present application is that the current laser equipment lacks effective protection mechanism in the use process, the laser is exposed, which is easy to cause harm to people and safety hazards. The laser equipment equipped with a protection mechanism is often placed inside the protection equipment, resulting in a large size of the protection equipment, which is inconvenient to carry and inconvenient to replace the laser equipment. In view of the above defects of the prior art, a protection method and device for laser equipment are provided.

[0006] In order to solve the above technical problems, the technical scheme adopted by the present application is:

[0007] A protection method for laser equipment is provided, which comprises connecting a laser device with a protection device to make the laser emitted by the laser device enter the protection device, and performing laser engraving on a to-be-engraved object in the protection device.

[0008] The protection device adjusts the engraving position according to the height of the to-be-engraved object and the laser device to make the to-be-engraved object be in the engraving focal distance range. The laser device is connected with the protection device from the outside of the protection device and emits engraving laser into the protection device for laser engraving.

[0009] The above protection method makes the laser engraving process in the protection device, ensures that the laser does not expose during the working process of the laser equipment, and makes the engraving work more safe. The to-be-engraved object moves up and down in the protection device to make the protection device adapt to different laser devices, so that the to-be-engraved object can be in the engraving focal distance range, the engraving effect is better, and the protection cover is smaller in size and more convenient to carry. In addition, the replacement of the laser equipment is also convenient, so that the protection cover can adapt to different laser devices.

[0010] In the above protective method, preferably, the protective device adjusts the engraving position according to the height of the object to be engraved and the laser equipment to make the object to be engraved within the engraving focal length range, and further comprises:

[0011] The protective device adjusts the position of the object to be engraved according to the different heights of the surface of the object to be engraved and / or different types of lasers to make the engraving surface of the object to be engraved within the laser engraving range.

[0012] The above protective method adjusts the object to be engraved according to the different heights of the object to be engraved and different types of lasers, so that the engraved objects of different heights are within the optimal focal length range of the laser, and it is also compatible with the engraving focal length of multiple laser equipment, expands the application range of the protective method, and improves the user experience.

[0013] In the above protective method, preferably, the adjustment of the position of the object to be engraved to make the engraving surface of the object to be engraved within the focal length range of the laser further comprises:

[0014] The support device carrying the object to be engraved moves to make the engraved object or the object to be engraved move up and down in parallel to adjust the engraving surface of the engraved object or the object to be engraved to be within the optimal focal length range of the laser equipment.

[0015] The above protective method makes the flatness of the plane supporting the engraved object always within the accuracy requirement range, avoids the inclination caused by the deviation of the engraved object from the center position of the plane of the support device, and affects the engraving effect, and the up and down parallel movement also improves the engraving accuracy.

[0016] In the above protective method, preferably, the laser equipment is connected to the protective device from the outside of the protective device and emits engraving laser to the protective device for laser engraving, and further comprises stopping the laser equipment from emitting engraving laser when at least one of the following situations occurs:

[0017] When it is detected that the protective device and the laser equipment are abnormally connected;

[0018] When the protective device is in an abnormal state and / or an open state;

[0019] When the object to be engraved and / or the engraving surface is not moved to a specific position but the up and down movement state is abnormal during the engraving process;

[0020] When the protective device is in an abnormal state, it includes one or a combination of the following: abnormal temperature inside the protective device, abnormal installation state of the protective device, and alarm sound emitted by the protective device;

[0021] When the to-be-engraved object and / or the engraving surface is not moved to a specific position during the engraving process but the up-down movement state is abnormal, it includes: the to-be-engraved object and / or the engraving surface is not moved to the best focal length engraving range during the engraving process, but the up-down movement stops or the up-down movement is abnormal.

[0022] The above protection method improves the safety of the laser engraving process by setting multiple different scenes, avoids accidents during the laser engraving process, and improves safety.

[0023] A protection device for a laser device is constructed, which includes a protection cover connected with the laser device. The to-be-engraved object is placed in the protection cover, and the laser device is connected with the protection cover and performs laser engraving on the to-be-engraved object. The to-be-engraved object is placed in the protection cover for laser engraving, and the engraved object is taken out from the protection cover after the laser engraving is completed. A supporting device is further arranged in the protection cover. The to-be-engraved object is placed on the supporting device, and the supporting device can move up and down to place the engraving surface of the to-be-engraved object in the focal length range of the laser device for laser engraving.

[0024] The protection device with the above structure realizes laser engraving work in the protection device, ensures that the laser does not expose during the working process of the laser device, and makes the engraving work safer. The to-be-engraved object moves up and down in the protection device, so that the protection device adapts to different laser device, and can work in the focal length range, and the engraving effect is better.

[0025] In the above protection device, preferably, the supporting device moves up and down through a guide structure. The supporting device includes a supporting plate bearing the to-be-engraved object, and a moving adapter module connecting the supporting plate with the guide structure. The moving adapter module moves up and down under the action of the guide structure to drive the supporting plate to move up and down.

[0026] The protection device with the above structure adjusts the to-be-engraved object according to the different heights of the to-be-engraved object and different types of lasers, so that the engraved objects of different heights are all in the best focal length range of the laser, and is compatible with the engraving focal length of multiple laser devices, expands the application range of the protection method, and improves the user experience.

[0027] In the above protection device, preferably, the moving adapter module includes a supporting plate adapter connected with the supporting plate. The moving adapter module and / or the supporting plate adapter adjust the flatness of the surface of the supporting plate, and drive the supporting plate to move up and down in the required flatness range.

[0028] The protection device with the above structure keeps the flatness of the surface of the supporting plate within the accuracy requirement range, avoids the engraved object deviating from the central position of the flat surface of the supporting plate to cause tilting and affect the engraving effect, and improves the engraving accuracy by moving up and down in parallel.

[0029] Preferably, the guiding structure comprises a guiding mechanism and a driving mechanism corresponding to the guiding mechanism, the guiding mechanism is connected with the mobile adapter module, and the driving mechanism drives the mobile adapter module to move up and down on the guiding mechanism to drive the support plate to move up and down.

[0030] The guiding mechanism further comprises a linear guiding module connected with the mobile adapter module, and the mobile adapter module moves on the linear guiding module to drive the support plate to move in the up-down direction and reduce resistance during the movement.

[0031] The guiding device of the protective device with the above structure realizes up-down reciprocating movement through the guiding structure, the guiding structure can be set according to the strength and accuracy requirements of the specific use scene of the user, and the bearing modules arranged on both sides reduce the resistance during the linear movement or linear movement of the guiding structure, and the movement accuracy is higher.

[0032] Preferably, the protective cover further comprises a top plate connected with the laser equipment, the laser equipment is connected with the protective cover through the top plate, and the connection is located outside the outer wall of the protective cover.

[0033] The bottom plate assembly is arranged on the bottom plate assembly to provide support for the protective cover.

[0034] The laser equipment of the protective device with the above structure is arranged outside the protective cover, the protective cover is more compact in size, is more convenient to carry, and facilitates replacement of the laser equipment, so that the protective cover is adapted to different laser equipment. Meanwhile, the bottom plate assembly provides support for the guiding structure, improves the accuracy of the parallel movement of the support plate up and down, and the connection of the bottom plate assembly with the sealing structure can prevent laser emission.

[0035] Preferably, the bottom plate assembly is further provided with an air duct communicating with the inside of the protective cover, the air duct is used for discharging gas and debris generated during laser engraving, the inside of the protective cover is provided with baffles, the support device is arranged between the baffles, the baffles are provided with isolation structures, the protective cover is provided with a collection module for collecting the state of the engraved object, the protective cover is further provided with a limiting structure, the support device stops moving when moving to the limiting structure, at least one group of baffles are arranged on the side surface of the protective cover, the engraved object in the protective cover can be taken out and placed into the to-be-engraved object when the baffles are opened, the protective cover is provided with a lamp strip and an adapter arranged on the side surface of the protective cover, the adapter is used for connecting external functional devices to the protective cover, and the protective cover is further provided with a monitoring module for detecting the engraved object and the engraving state.

[0036] The protective device with the above structure discharges the carving sundries and the gas in the carving process out of the protective cover by arranging the air duct in the bottom plate assembly; the guiding structure is isolated by arranging the isolation structure, so that the oil fume and the sundries in the carving process do not affect the work of the guiding structure, and the service life of the protective cover is prolonged. The monitoring module adopts a camera to collect, can collect the carving process, the carving depth, the position and the carving range information, realizes the functions such as automatic focusing and automatic layout of the carving range, and further improves the user experience.

[0037] The present application has the advantages that: the laser equipment is connected with the protective cover to protect the laser carving work, and the safety in the laser carving process is improved. The support plate of the protective device can move up and down, so that the protective cover can adapt to the height of different carving objects and different types of carving machines, and laser carving in the best focal length range can be realized, the application range of the protective device is expanded, and the user experience is improved. The guiding structure arranged on the left and right sides of the support plate moves the support plate up and down to ensure the stability in the carving process, the carving effect is better, and the carving precision is improved. Since the laser equipment is arranged outside the protective cover, the protective cover is more compact, is convenient to carry, is convenient to replace different types of laser equipment, a plurality of state detection modules are arranged in the protective cover to detect the state of the protective cover, the use safety of the protective device is improved, the user experience is better, and the service life is longer. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the present application will be further described below with reference to the drawings and embodiments. The drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any inventive labor:

[0039] Fig. 1 is a structure schematic diagram of a first connection mode of a protective cover and a laser device of a preferred embodiment of the present application;

[0040] Fig. 2 is a structure schematic diagram of a second connection mode of the protective cover and the laser device of the preferred embodiment of the present application;

[0041] Fig. 3 is a front shaft side structure schematic diagram of the connection of the protective cover and the laser device of the preferred embodiment of the present application;

[0042] Fig. 4 is a partial exploded schematic diagram of the connection of the laser and the protective cover of the preferred embodiment of the present application;

[0043] Fig. 5 is a rear shaft side structure schematic diagram of the connection of the protective cover and the laser device of the preferred embodiment of the present application;

[0044] Fig. 6 is a structure schematic diagram of the protective device in an open state of a front baffle of the preferred embodiment of the present application;

[0045] Fig. 7 is a structural schematic diagram of the light plate and the fan module in the open front baffle state of the preferred embodiment of the present application;

[0046] Fig. 8 is a structural schematic diagram of the open front baffle and rear baffle state of the preferred embodiment of the present application;

[0047] Fig. 9 is a structural schematic diagram of the rear baffle and the shell connection of the preferred embodiment of the present application;

[0048] Fig. 10 is a structural schematic diagram of the inner bottom plate of the preferred embodiment of the present application;

[0049] Fig. 11 is another structural schematic diagram of the inner bottom plate of the preferred embodiment of the present application;

[0050] Fig. 12 is a structural schematic diagram of the left guide structure installation of the preferred embodiment of the present application;

[0051] Fig. 13 is a structural schematic diagram of the steel shaft and linear bearing and the moving adapter connection of the preferred embodiment of the present application;

[0052] Fig. 14 is an enlarged structural schematic diagram of B in Fig. 13 of the preferred embodiment of the present application;

[0053] Fig. 15 is a structural schematic diagram of the right guide structure and the shaft side of the preferred embodiment of the present application;

[0054] Fig. 16 is a structural schematic diagram of the moving adapter and the support plate adapter connection of the preferred embodiment of the present application;

[0055] Fig. 17 is a structural schematic diagram of the support plate adapter of the preferred embodiment of the present application. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the technical scheme of the embodiments of the present application to make a clear and complete description, obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0057] The protective device of the laser equipment of the preferred embodiment of the present application; as shown in Figs. 1-2, the laser equipment 2 is fixed on the protective cover 1 to be used in combination, so as to ensure that all the laser in the working process of the laser equipment enters the protective cover, and the laser engraving work is carried out on the object to be engraved in the protective cover, so as to play the protective effect in the laser engraving process, and improve the safety of the laser engraving process.

[0058] Specifically, as shown in FIGS. 2-4, the protective cover 1 includes a top plate 101 connected with the laser device 2, and a shell 103 disposed below the top plate 101, the upper end of the shell is provided with a top load-bearing plate 102, and the top plate is placed on the top load-bearing plate to realize the connection of the laser device and the protective cover. As shown in FIGS. 3 and 5, front and rear side plates 107 and 108 are respectively arranged on the front and rear sides of the protective cover, and the front and rear side plates can be opened or closed, so as to open the protective cover to take out the carved articles after carving and put in the articles to be carved. A support plate 111 movable up and down is further arranged in the shell of the protective cover, the articles to be carved are placed on the support plate to be laser carved, and since the support plate is movable up and down, it can adapt to the focal length of different types of laser carving machines, so as to ensure that the carved articles of different heights are within the best focal length range of the laser device 2, compatible with the carving focal length of various laser devices, further expand the application range of the protective cover device, and improve the user experience. As shown in FIG. 4, a key plate 105 and an indicator light plate 106 are arranged on the side of the protective cover 1, the key plate includes up and down keys to control the up and down movement of the support plate 111; at the same time, the indicator light plate displays the working state of the protective cover 1 and the communication state of the protective cover and the laser device according to different indicating colors and flashing states thereof, and the specific indicating effect of the indicator light plate is not described here, which should all belong to the protection scope of the present application.

[0059] Further, as shown in FIG. 3, in order to improve the functionality of the protective cover, a shell adapter 104 is further arranged on the side of the protective cover 1, and the shell adapter 104 can be connected with an air pump through an air pipe, so as to extract the gas and impurities generated in the interior of the protective cover during the carving process through the air pump, and purify the air in the interior of the protective cover. As shown in FIG. 5, the shell 103 is provided with a switch 116 for controlling the on-off state of the protective cover 1, and a fire extinguishing device interface 117 for connecting with a fire extinguishing device, when the laser device is working and the interior of the protective cover is on fire or the temperature is too high, the sensor in the interior of the protective cover is triggered, the laser device 2 stops working, and the buzzer in the interior of the protective cover is started to emit an alarm sound, at this time, the machine can be stopped for inspection or the fire extinguishing device can be manually or electrically started to realize the fire extinguishing function and improve the safety of the use of the protective cover 1. The side and back of the protective cover are further provided with a power supply and communication port for connecting with an external power supply and communicating with external devices (such as a fire extinguishing device), and at the same time, the communication and power supply of the laser device 2 and the protective cover device 1 are ensured.

[0060] Further, as shown in FIG. 4, in order to make the protective cover 1 adaptable to different laser devices 2, the laser device 2 is connected with the top plate 101 and then connected with the protective cover, and a Hall sensor is arranged on the laser device 2, and a magnet is arranged on the top plate corresponding to the Hall sensor, when the top plate 101 is fixed with the laser device 2, the installation state of the top plate and the laser device can be detected by the Hall sensor and fed back to the main control system, so that the main control system can perceive the installation state of the top plate 101 and the laser device 2, and only when the main control system perceives that the installation state of the top plate and the laser device is correct, the laser device can work. The Hall sensor can be replaced by other sensors to detect the installation state of the top plate and the laser device, which should all belong to the protection scope of the present application, and only when the main control system determines that the installation state of the top plate and the laser device is correct, the laser device can emit laser for engraving work. The top plate 101 can also be provided with a foolproof structure to facilitate the connection of the laser device and the top plate, so that the top plate is adaptable to different laser devices. The upper end of the top plate is connected with the laser device, and the lower end is connected with the top bearing plate at the same time, which can be detachably connected by bolt locking or other buckle mode. And the same installation state detection unit is arranged between the top bearing plate 102 and the top plate, only when the installation state detection unit detects that the installation state of the top bearing plate and the top plate is correct, the installation state can be fed back to the main control system and the corresponding action is performed by the main control system. In order to use the laser device in more scenes, the connection angle of the top plate 101 and the top bearing plate 102 can be changed, and the top plate can be provided with a magnet at different angles, and the top bearing plate is provided with a group of Hall sensors, so that the top plate and the top bearing plate can be correspondingly provided in different shapes, such as triangle, square, regular hexagon, etc., so that the top plate can be connected with the top bearing plate at different angles, and the connection is more convenient.

[0061] Further, as shown in FIG. 7, the top bearing plate 102 is provided with a lamp strip 114 at the lower end, which provides illumination for the inside of the protective cover, and a camera module can also be arranged on the top bearing plate, and the lamp strip can also provide shooting illumination function for the camera module to improve user experience. At the same time, the camera is not only used for shooting and positioning the engraved object, but also can be used for collecting depth, position and engraving range information, realizing functions such as automatic focusing and automatic layout of engraving range, further improving user experience.

[0062] Further, as shown in FIG. 6, the front baffle 107 is connected with the top load-bearing plate 102 through two sets of hinge structures, and the two sets of hinge structures are distributed up and down. One end of the hinge structure 107-1 is connected with the top load-bearing plate 102, and the other end is connected with the front baffle. The front baffle 107 can rotate along the axis of the hinge structures 107-1 and 107-2 to realize the opening and closing of the front baffle 107. A Hall sensor is arranged on the shell 103, and a magnet is arranged on the front baffle correspondingly. When the front baffle is opened and closed, the distance between the magnet and the Hall sensor is different, so as to realize the detection of the opening and closing state of the front baffle. Other sensors can also be used to detect the state of the front baffle and the shell. When the front baffle is in the open state, the main control program senses that the front baffle 107 is in the open state, and then the light emission of the laser device 2 is turned off to avoid laser emission and improve safety. The connection between the front baffle 107 and the shell 103 can use a magnet or a magnetic sheet to keep the front baffle tightly closed on the shell, or use a buckle or other tight structure to keep the front baffle tightly closed on the shell. A sealing strip or a brush structure can be arranged on the front baffle 107 to prevent laser from being exposed when the front baffle is in the working state. As shown in FIG. 9, the connection principle of the rear baffle 108 and the shell is the same as that of the front baffle and the shell, which will not be repeated here.

[0063] Further, as shown in FIG. 8, the bottom of the shell 103 is provided with a bottom plate, which includes an inner bottom plate 109 and an outer bottom plate 110. The outer bottom plate is arranged on the contact surface of the placement position of the protective cover on the table top, thereby playing a role of anti-skid and wear-resistant, and also preventing laser emission. As shown in FIGS. 10-11, the inner bottom plate 109 is provided with a slotted structure A on the left and right sides. A channel is arranged between the outer bottom plate and the inner bottom plate and communicates with the slotted structure A. The outer bottom plate is provided with an air duct opening, thereby forming an air duct in the protective cover to discharge the carving debris and gas. The fan module 115 can be connected through an external pump or through the shell adapter 104 to discharge the debris and gas generated in the carving process. The fan module can be connected in a fixed or quick-release manner, facilitating the disassembly of the fan module. It should be noted that when the carving debris and gas are discharged through the air duct, the air duct opening at the bottom of the outer bottom plate is hollow or is provided with a connecting piece connected with the air duct opening to discharge the carving debris and gas.

[0064] Further, as shown in Figures 12-14, the inside of the protective cover 1 is also provided with a moving adapter 125 connected with the support plate, the moving adapter is provided in two groups and placed on the left and right sides of the protective cover, and the left and right sides of the support plate 111 are placed on the moving adapter. The left and right sides of the protective cover are also provided with a guide structure for driving the support plate to move up and down, and the inner bottom plate provides support for the guide structure on the left and right sides, and connects the inner bottom plate with the shell to provide support for the shell. The left guide structure includes a left motor fixed plate 121 connected with the top bearing plate 102, a lead screw motor 123 is arranged on the left motor fixed plate, a bearing 127 is arranged on the inner bottom plate corresponding to the lead screw motor 123, one end of the lead screw motor shaft penetrates through the bearing 127 and rotates with the bearing 127 to reduce the rotation resistance of the motor shaft. A synchronous wheel 128-1 is arranged at the bottom of the motor shaft, and the synchronous wheel rotates coaxially with the motor shaft, two steel shafts 124 are arranged on the left and right sides of the lead screw motor 123, the upper ends of the two steel shafts are connected with the left motor fixed plate 121, and the lower ends are connected with the inner bottom plate 109. A linear bearing 126 is arranged on the steel shaft, which cooperates with the linear bearing 126 to reduce the resistance during reciprocating linear movement. The lead screw motor 123 is connected with the moving adapter 125 through a lead screw nut, and the two linear bearings 126 are also connected with the moving adapter 125. When the lead screw motor rotates, the moving adapter 125 is driven to move smoothly along the steel shaft 124, and then the support plate is driven to move smoothly, the position of the support plate 111 can be adjusted according to the height of the object to be carved, so that the carving objects of different heights are within the best focal length range of the laser device 2, and the carving focal length of various laser devices is compatible. The setting of the lead screw motor can meet the required movement precision of the design requirements. It should be noted that other guide structures such as linear guide rails and double-shaft linear guide rails can be used instead of the guide mode of the steel shaft 124 and the linear bearing 126, which should belong to the protection scope of the present application. The right guide structure is the same as the left guide structure, which will not be repeated here. However, it should be noted that due to the existence of the synchronous wheel and the synchronous belt, according to the specific use scene intensity and precision requirement of the user, a single-sided motor and guide mechanism or a single-sided motor and double guide mechanism can be used to realize the up-down reciprocating motion. The greater the weight of the carved object, the double-sided motor and double guide mechanism can be used.

[0065] It should be noted that in the present application, the driving mechanism is a lead screw motor. When the lead screw motor works, the shaft of the lead screw motor rotates to drive the moving adapter 125 to move up and down, and cooperates with the guiding mechanism such as linear guide rail, linear bearing, double shaft linear guide rail, etc. to keep the smoothness and accuracy of the movement process. The motor can also be connected to other transmission mechanisms, such as transmission connecting rod, gear transmission, etc. to drive the transmission mechanism to move when the motor works. The moving adapter 125 is connected with the transmission mechanism to move up and down, which also belongs to the protection scope of the present application. At the same time, the driving mechanism in the present application is a lead screw motor, which can also be driven by other driving mechanisms to drive the guiding mechanism to move to drive the support plate to move up and down. Or through the manual driving mode to drive the guiding mechanism to move to drive the support plate to move up and down. The driving mode of the conventional driving mechanical type or manual type driving guiding mechanism should belong to the driving mechanism protection scope of the present application.

[0066] Further, as shown in FIG. 15, the synchronous wheel 128-1 and the synchronous wheel 128-2 can be connected by the synchronous belt 129, so that the two sides of the lead screw motor always keep synchronous rotation state. The flatness of the support plate 111 during movement is always within the accuracy requirement range. Avoiding the user placing the engraved object at a position deviating from the center of the support plate 111, which causes the support plate 111 to tilt, thereby affecting the engraving effect. At the same time, it also avoids the problems of transmission jamming, locked-rotor, etc. caused by the tilt of the support plate 111.

[0067] Further, as shown in FIGS. 16-17, the moving adapter 125 is provided with a support plate adapter 120. The support plate is connected with the support plate adapter. The guiding mechanism drives the moving adapter to move up and down, thereby driving the support plate adapter to move up and down, and driving the support plate to move up and down. But during the machine installation and debugging process, the left and right guiding structures need to be leveled, and then the support plate 111 is connected and fixed with the moving adapter through the support plate adapter. The support plate adapter 120 is provided with a support plate adapter threaded hole C. The bolt can be screwed at the position of the threaded hole C. The clearance between the support plate adapter 120 and the support plate 111 is controlled by adjusting the screwing depth of the bolt. The flatness of the entire support plate 111 surface is adjusted by adjusting the clearance between the four support plate adapters 120 and the support plate 111, so as to ensure that the flatness of the support plate 111 of each machine after batch processing and installation meets the flatness requirement, thereby improving the engraving accuracy of the entire machine. The up and down movement of the support plate 111 can ensure that the engraved objects of different heights are within the best focal length range of the laser device 2, compatible with the engraving focal length of various laser devices, further expand the application range of the protective cover, and improve the user experience. The moving adapter 125 and the support plate adapter can adopt an integrated structure or a detachable structure.

[0068] When necessary, the two side screw motors can be connected to realize synchronous movement without synchronous pulley and synchronous belt. A detection module can be arranged to detect the running state of the two side motors, and a correction algorithm is used to keep the running state of the two side motors relatively consistent to ensure that the flatness of the support plate 111 during movement is always within the accuracy requirement range. This method does not require leveling the left and right guiding structures during machine installation and debugging, and then connecting and fixing the support plate 111 and the moving adapter through the support plate adapter. However, the support plate adapter screw hole C provided on the support plate adapter 120 can still be retained, and a bolt can be screwed at the position of the screw hole C. By adjusting the screwing depth of the bolt, the gap between the support plate adapter 120 and the support plate 111 is controlled. By adjusting the gap between the four support plate adapters 120 and the support plate 111, the flatness of the entire surface of the support plate 111 is adjusted, so that the flatness of the support plate 111 of each machine after batch processing and installation meets the flatness requirement, thereby improving the overall engraving accuracy.

[0069] Regardless of the method used, the support plate adapter screw hole C provided on the support plate adapter 120 is not a necessary item, and can be considered comprehensively according to the actual engraving scene accuracy requirement, overall machine part processing, installation accuracy, etc.

[0070] Further, as shown in FIG. 16, limit switches are provided on the upper and lower sides of the moving adapter 125. An upper limit switch sensor 130-1 is provided on the right motor fixed plate 122 corresponding to the upper limit switch 130, and a lower limit switch sensor 131-1 is provided on the inner bottom plate 109 corresponding to the lower limit switch 131. During upward movement of the support plate 111, when the upper limit switch triggers the upper limit switch sensor, the screw motor stops rotating. At this time, the support plate 111 moves upward to the uppermost limit position. During downward movement of the support plate 111, when the lower limit switch triggers the lower limit switch sensor, the screw motor stops rotating. At this time, the support plate moves downward to the lowermost position. The upper and lower limit switches and the upper and lower limit switch sensors can also be arranged on the left and right sides, which also belongs to the protection scope of the present application.

[0071] Further, a stall sensor is further provided on one side of the screw motor. When the load placed on the support plate interferes with the inner cavity of the protective cover during movement, causing the support plate to be unable to move up and down or the movement speed to change, the stall sensor will be triggered. At this time, the main control program issues a command to stop the screw motor rotating, so as to ensure the safe use of the protective cover. The stall sensor can also be replaced by other sensors to detect the change in the upward and downward movement speed of the support plate. When the upward and downward movement speed of the support plate is suddenly changed or stopped, it is considered that the upward and downward movement is abnormal and the main control program is triggered to drive the motor to stop rotating.

[0072] Further, as shown in Figure 8, the left and right sides of the protective cover 1 are also provided with left and right side baffles 112 and 113. The gaps exposed by the left and right side baffles 112 and 113 are provided with soft brush or soft pad structures to isolate the oil smoke and debris generated during engraving from the left and right side guide systems, thereby prolonging the service life of the protective cover. The left and right side baffles 112 and 113 isolate the guide mechanism from the inside of the protective cover, but do not affect the driving of the guide mechanism. The left and right side baffles can also be replaced by other isolation structures, such as an organ cover or linoleum, to isolate the motor, steel shaft and linear bearing from oil contamination.

[0073] A protective method for a laser device according to the preferred embodiment of the present application. According to the protective device for the laser device described above, the corresponding laser device is connected to the outside of the protective cover according to the material of the engraved object. The protective cover baffle is opened, the engraved object is placed on the support plate, and the support plate is moved up and down according to the height of the laser-engraved object on the support plate, so that the surface of the engraved object is within the optimal engraving focal length range. A camera or other device can also be provided inside the protective cover to collect the height and size of the engraved object, and the collected information is fed back to the main control program, which drives the support plate to move up and down to keep the engraved object in the optimal engraving position. At the same time, the up and down movement of the support plate keeps the engraved surface within the engraving focal length range, including the movement of the support plate before the engraved object is placed on the support plate for engraving, and the movement of the engraved object during the engraving process to keep the engraved surface within the engraving focal length range. The movement during the engraving process is generally aimed at keeping the engraved surface within the engraving focal length range in the case of different heights of the engraved surface.

[0074] Further, for the up and down movement of the support plate, the guide mechanism is driven by the main control program to move, thereby driving the support plate to move up and down, and the engraved object is kept in a parallel up and down movement state, so that the support plate moves up and down in parallel within the required movement accuracy range, and ensures that engraved objects of different heights are within the optimal focal length range of the laser device. It is also compatible with the engraving focal length of multiple laser devices, thereby expanding the application range of the protective cover.

[0075] Further, in order to improve the safety of the laser device during operation, a plurality of detection units are provided in the protective cover, including detection of the installation state of the protective cover, the opening and closing state of the front and rear baffles of the protective cover, and the movement state and position of the support plate. When the main control program receives an abnormal signal from the detection unit, the laser device will be driven to stop working. The movement state of the support plate includes abnormal movement during movement to the optimal engraving position. Abnormal movement includes sudden deceleration during movement, sudden stop without reaching the optimal engraving position, which can be determined as an abnormal state to drive the laser device to stop laser engraving.

[0076] It is to be understood that the present application is described by way of example only, and that modifications or alterations can be made to the features and embodiments described without departing from the spirit and scope of the application as set out in the claims. In addition, modifications can be made to the features and embodiments described to accommodate specific situations and materials without departing from the spirit and scope of the application. Accordingly, the application is not limited to the specific embodiments disclosed herein, but rather, the scope of the application is to be determined by the claims which follow.

Claims

1. A protective method of a laser device, comprising connecting a laser device with a protective device so that the laser emitted by the laser device enters the protective device, and performing laser engraving on an object to be engraved in the protective device. The protection device adjusts the engraving position according to the height of the object to be engraved and the laser equipment, so that the object to be engraved is within the engraving focal length range, characterized in that: The laser device is connected with the protective device from outside the protective device and emits engraving laser to the protective device to perform laser engraving on the object to be engraved.

2. The method of claim 1, wherein: The protective device adjusts the engraving position according to the height of the object to be engraved and the laser device so that the object to be engraved is within the engraving focal length range, and further comprises: The protective device adjusts the position of the object to be engraved according to the different heights of the surface of the object to be engraved and / or the different types of lasers so that the engraved surface of the object to be engraved is within the laser engraving range.

3. The method of claim 2, wherein: The position of the object to be engraved is adjusted so that the laser focal point is on the engraved surface of the object to be engraved, and further comprises: The support device carrying the object to be engraved moves to move the object to be engraved up and down to adjust the engraved surface of the object to be engraved to be within the optimal focal length range of the laser device.

4. The method of claim 1, wherein: The laser device is connected with the protective device from outside the protective device and emits engraving laser to the protective device to perform laser engraving, and further comprises stopping the laser device from emitting engraving laser when at least one of the following conditions is met: When it is detected that the protective device is abnormally connected with the laser device; When the protective device is in an abnormal state and / or an open state; When the object to be engraved and / or the engraved surface is not moved to a specific position but the up and down movement state is abnormal; When the protective device is in an abnormal state, including one or a combination of the following: abnormal temperature inside the protective device, abnormal installation state of the protective device, and alarm sound emitted by the protective device; When the object to be engraved and / or the engraved surface is not moved to a specific position but the up and down movement state is abnormal during the engraving process, including that the object to be engraved and / or the engraved surface is not moved to the optimal focal length engraving range but the up and down movement stops or is abnormal.

5. A protective device for a laser device, comprising a protective cover connected to the laser device, a to-be-engraved object being placed in the protective cover, and the laser device being connected to the protective cover and performing laser engraving on the to-be-engraved object, the to-be-engraved object being placed in the protective cover for laser engraving, and the engraved object being taken out of the protective cover after the laser engraving is completed, characterized in that: The protective cover further comprises a support device, the object to be engraved is placed on the support device, and the support device can move up and down to place the engraved surface of the object to be engraved at the laser focal point of the laser device for laser engraving.

6. The guard of claim 5, wherein: The support device moves up and down through a guide structure, and the support device comprises a support plate carrying the object to be engraved, and a moving adapter module connecting the support plate with the guide structure, which moves up and down under the action of the guide structure to drive the support plate to move up and down.

7. The guard of claim 6, wherein: The moving adapter module comprises a support plate adapter connected with the support plate, and the moving adapter module and / or the support plate adapter adjusts the flatness of the surface of the support plate and drives the support plate to move up and down within the required flatness range.

8. The guard of claim 6, wherein: The guide structure comprises a guide mechanism and a driving mechanism corresponding to the guide mechanism, the guide mechanism is connected with the moving adapter module, and the driving mechanism drives the moving adapter module to move up and down on the guide mechanism to drive the support plate to move up and down. The guide mechanism further comprises a linear guide module connected with the moving adapter module, and the moving adapter moves on the linear guide module to move the support plate in the up and down direction and reduce the resistance during the movement.

9. The guard of claim 5, wherein: The protective cover further comprises a top plate connected with the laser device, and the laser device is connected with the protective cover through the top plate and the connection is outside the outer wall of the protective cover. The bottom of the protective cover is provided with a bottom plate assembly which provides support for the protective cover, and the bottom plate assembly is provided with a sealing structure.

10. The guard of claim 9, wherein: The bottom plate assembly is further provided with an air duct which communicates with the interior of the protective cover and through which gas and debris generated during laser engraving are discharged, the protective cover is provided with a separation structure, the protective cover is provided with a collection module which collects the state of the engraved object, the protective cover is further provided with a limiting structure, when the support device moves to the limiting position and stops moving, the side of the protective cover is further provided with at least one set of baffles, when the baffles are opened, the engraved object in the interior of the protective cover can be taken out and placed into the object to be engraved, the protective cover is provided with a lamp strip, and an adapter is arranged on the side of the protective cover, through which an external functional device is connected to the protective cover, and the protective cover is further provided with a monitoring module which detects the engraved object and the state of engraving.

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