Dynamic Feedback Mold Condition Detection System for Injection Molding Machines Based on Machine Vision

Abstract

The present invention discloses a dynamic feedback type injection molding machine mold state detection system based on machine vision, which relates to the technical field of injection molding machine molds. It includes a mounting frame and a display screen. A slide rail is installed inside the mounting frame, and a driving component is slidably connected to the surface of the slide rail. The top of the driving component is connected to a placement component, and a detection component is installed on the top of the placement component. The display screen is electrically connected to the output end of the detection component, and protective corner seats are arranged on the outer surface of the display screen. The present invention adopts the mutual cooperation setting among multiple components, which can not only adjust multi-angles to achieve dynamic detection, avoid the situation that there are dead angles and cannot be detected, but also freely adjust the height of the detection device by using the placement component to improve the adaptability of the device, so that the device is suitable for different working environments. At the same time, by using the setting of the telescopic tube, it can freely adjust the working position and angle of the near-infrared micro camera, which is convenient for detecting and adjusting the mold.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding machine molds, and specifically to a dynamic feedback type injection molding machine mold state detection system based on machine vision. Background Technique

[0002] An injection molding machine is also known as an injection molding machine or an injection machine. It is the main molding equipment for making various shaped plastic products from thermoplastic or thermosetting plastics using plastic molding molds. It is divided into vertical, horizontal, and all-electric types. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. For the use of the mold, it is necessary to detect the mold in real time to ensure the normal production of the injection molding machine.

[0003] The injection molding machine mold state detection systems on the market are used in a fixed manner. After installation, the position is about to be fixed and cannot be dynamically adjusted, resulting in the inability to detect and discover the dead corners in the injection molding machine, which affects the production of the mold. Summary of the Invention

[0004] The purpose of the present invention is to provide a dynamic feedback type injection molding machine mold state detection system based on machine vision to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A dynamic feedback type injection molding machine mold state detection system based on machine vision, including a mounting frame and a display screen. A slide rail is installed inside the mounting frame, and a driving component is slidably connected to the surface of the slide rail. The top of the driving component is connected to a placement component, and a detection component is installed on the top of the placement component. The display screen is electrically connected to the output end of the detection component, and a protective corner seat is arranged on the outer surface of the display screen. The driving component includes a sliding frame, a tooth rack, a driving gear, and a stepping motor. The tooth rack is arranged on the outer surface of the sliding frame, the driving gear meshes with the outer surface of the tooth rack, and the stepping motor is arranged in the middle of the driving gear. The sliding frame is slidably connected to the slide rail, and the sliding frame and the slide rail are distributed in concentric circles.

[0006] Further, a limit block is installed at the bottom of the mounting frame, and a handle screw is threadedly connected to the middle of the limit block. One end of the handle screw is rotatably connected to a limit plate, and a rubber pad is adhered to the outer surface of the limit plate.

[0007] Further, a protective silica gel pad is arranged on the inner wall of the top of the mounting frame, and reset springs are embedded on both sides of the inner wall of the mounting frame. One end of the reset spring away from the mounting frame is connected to a stabilizing block, and a limit airbag is arranged inside the stabilizing block.

[0008] Further, the placement component includes a connection block, a telescopic spring, a clamping block, a placement frame, and a groove. Both sides of the connection block are embedded with the telescopic spring. One end of the telescopic spring away from the connection block is connected to the clamping block. The top of the connection block is connected to the placement frame, and the groove is provided on the surface of the placement frame.

[0009] Further, the placement component further includes a micro-push rod, a transfer block, and a placement table. The micro-push rod is connected to the right side of the placement frame. The output end of the micro-push rod is connected to the transfer block, and one end of the transfer block away from the micro-push rod is connected to the placement table.

[0010] Further, the placement table is slidably connected to the placement frame. The external dimensions of the placement table are consistent with the internal dimensions of the placement frame, and the placement table has a rectangular structure.

[0011] Further, the detection component includes a detection box, a single-chip microcomputer, a damping rotating shaft frame, a support frame, a rotating support, and a near-infrared light source. The single-chip microcomputer is arranged inside the detection box. The damping rotating shaft frame is arranged on the outer surface of the detection box. The support frame is arranged on the outer surface of the damping rotating shaft frame. The outer end of the support frame is connected to the rotating support, and the near-infrared light source is installed inside the rotating support.

[0012] Further, the detection component further includes a telescopic tube and a near-infrared micro-camera. The telescopic tube is connected to the surface of the support frame, and one end of the telescopic tube away from the support frame is connected to the near-infrared micro-camera.

[0013] Further, the single-chip microcomputer is electrically connected to the display screen, and a protection component is arranged on the outer surface of the display screen.

[0014] Further, the protection component includes a sliding protection cover, a magnetic strip, and an alarm light strip. The end of the sliding protection cover is connected to the sliding protection cover, and the alarm light strip is arranged on the outer surface of the sliding protection cover.

[0015] The present invention provides a dynamic feedback type injection molding machine mold state detection system based on machine vision, which has the following beneficial effects: The dynamic feedback type injection molding machine mold state detection system based on machine vision, through the mutual cooperation setting of multiple components, can not only adjust from multiple angles to achieve dynamic detection, avoid the situation that there are dead corners that cannot be detected, and use the placement component to freely adjust the height of the detection device, improve the adaptability of the device, so that the device is suitable for different working environments. At the same time, by setting the telescopic tube, it can freely adjust the working position and angle of the near-infrared micro-camera, which is convenient for detecting and adjusting the mold.

[0016] 1. Through the mutual cooperation between the mounting frame and the limiting block, the handle screw rod that rotates by threads can push the limiting plate, causing the two-sided limiting plates to move towards the middle of the mounting frame to clamp the injection molding machine equipment, so that the equipment is connected to the outside of the injection molding machine, facilitating the disassembly and installation of the equipment. At the same time, the use of the return spring and the stabilizing block can also improve the clamping force on the injection molding machine and enhance the firmness of the connection between the equipment and the injection molding machine.

[0017] 2. Through the mutual cooperation between the mounting frame and the drive assembly, the sliding frame in the drive assembly is slidably connected to the slide rail on the upper surface of the mounting frame. At the same time, using the toothed rack arranged on the outer surface of the sliding frame, when the stepping motor drives the drive gear to rotate, the drive gear drives the toothed rack meshed with it, and then drives the sliding frame to slide on the surface of the slide rail. This not only enables the equipment to be adjusted at multiple angles but also realizes dynamic detection, avoiding the situation where there are blind spots that cannot be detected.

[0018] 3. Through the setting of the placement assembly, the clamping blocks on both sides of the connection block are inserted and clamped on the top of the sliding frame. Driven by the micro push rod, the transfer block pushes the placement table to slide in the groove on the surface of the placement frame, which is used to adjust the height of the detection equipment, improve the versatility of the equipment, and enable the equipment to be applied to different working environments.

[0019] 4. Through the mutual cooperation between the detection assembly and the placement assembly, the detection box in the detection assembly is connected to the surface of the placement table. The damping rotating shaft frame can freely adjust the application angle of the support frame. At the same time, a rotating bracket and a near-infrared light source are arranged at the outer end of the support frame, so that the near-infrared light source can also be freely adjusted for convenient use. The telescopic tube made of stainless steel material can adjust the detection position of the near-infrared micro camera. With the setting of the single-chip microcomputer, a transmission module and a conversion module are embedded on the surface of the single-chip microcomputer. The near-infrared micro camera captures the state information of the injection molding machine mold and transmits it to the display screen for display, facilitating the inspection staff to view.

[0020] 5. Through the setting of the protection assembly, the sliding protection cover in the protection assembly is slidably connected to the outer surface of the display screen. The magnetic strip facilitates the opening and closing of the sliding protection cover. There is an alarm light strip arranged on the surface of the sliding protection cover. When the near-infrared micro camera detects an abnormal state of the injection molding machine mold, the single-chip microcomputer issues an instruction to the alarm light strip to warn the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structural schematic diagram of the dynamic feedback type injection molding machine mold state detection system based on machine vision of the present invention;

[0022] Figure 2Schematic front view structure of the mounting frame of the dynamic feedback type injection molding machine mold state detection system based on machine vision according to the present invention;

[0023] Figure 3 Schematic cross-sectional view structure of the mounting frame of the dynamic feedback type injection molding machine mold state detection system based on machine vision according to the present invention;

[0024] Figure 4 Schematic structure diagram of the placement component of the dynamic feedback type injection molding machine mold state detection system based on machine vision according to the present invention;

[0025] Figure 5 For the dynamic feedback type injection molding machine mold state detection system based on machine vision according to the present invention Figure 4 Schematic enlarged structure diagram at position A;

[0026] Figure 6 Schematic structure diagram of the detection component of the dynamic feedback type injection molding machine mold state detection system based on machine vision according to the present invention;

[0027] Figure 7 Schematic structure diagram of the display screen of the dynamic feedback type injection molding machine mold state detection system based on machine vision according to the present invention.

[0028] In the figure: 1, mounting frame; 2, slide rail; 3, drive component; 301, sliding frame; 302, tooth rack; 303, drive gear; 304, stepper motor; 4, placement component; 401, connecting block; 402, telescopic spring; 403, clamping block; 404, placement frame; 405, groove; 406, micro push rod; 407, adapter block; 408, placement table; 5, detection component; 501, detection box; 502, single-chip microcomputer; 503, damping rotating shaft frame; 504, support frame; 505, rotating bracket; 506, near-infrared light source; 507, telescopic tube; 508, near-infrared micro camera; 6, display screen; 7, protective corner seat; 8, limit block; 9, handle screw; 10, limit plate; 11, rubber pad; 12, protective silicone pad; 13, return spring; 14, stabilizing block; 15, limit airbag; 16, protective component; 1601, sliding protective cover; 1602, magnetic strip; 1603, alarm light strip. Detailed implementation manners

[0029] Please refer to Figures 1-7 , the present invention provides a technical solution: a dynamic feedback type injection molding machine mold state detection system based on machine vision, including a mounting frame 1 and a display screen 6. A slide rail 2 is installed inside the mounting frame 1, and a drive component 3 is slidably connected to the surface of the slide rail 2. The top of the drive component 3 is connected to a placement component 4, and a detection component 5 is installed on the top of the placement component 4. The display screen 6 is electrically connected to the output end of the detection component 5, and a protective corner seat 7 is arranged on the outer surface of the display screen 6;

[0030] Please refer to Figures 1-2 , a limit block 8 is installed at the bottom of the mounting frame 1, and a handle screw 9 is threadedly connected to the middle of the limit block 8. One end of the handle screw 9 is rotatably connected to a limit plate 10, and a rubber pad 11 is adhered to the outer surface of the limit plate 10. A protective silica gel pad 12 is provided on the inner wall of the top of the mounting frame 1, and reset springs 13 are embedded on both sides of the inner wall of the mounting frame 1. One end of the reset spring 13 away from the mounting frame 1 is connected to a stabilizing block 14, and a limit airbag 15 is provided inside the stabilizing block 14;

[0031] The specific operation is as follows. Through the mutual cooperation between the mounting frame 1 and the limit block 8, the limit block 8 is distributed in a rectangular shape on both sides of the mounting frame 1, and the handle screw 9 is threadedly connected to the middle of the limit block 8, so that the handle screw 9 rotating by thread can push the limit plate 10, and the limit plates 10 on both sides move towards the middle of the mounting frame 1 to clamp the injection molding machine equipment. Thus, the equipment is connected to the outside of the injection molding machine, which is convenient for the disassembly and installation of the equipment. At the same time, with the rubber pad 11 adhered to the outer surface of the limit plate 10, the friction coefficient with the outer surface of the injection molding machine is further increased, and the connection tightness is improved. At the same time, the use of the reset spring 13 and the stabilizing block 14 can also improve the clamping of the injection molding machine and enhance the firmness of the connection between the equipment and the injection molding machine. The mounting frame 1 has an arc-shaped structure, and a protective silica gel pad 12 is also provided on the inner wall of its top to prevent scratching of its outer surface with the injection molding machine;

[0032] Please refer to Figure 2 and Figure 3 , the driving component 3 includes a sliding frame 301, a tooth rack 302, a driving gear 303 and a stepping motor 304. A tooth rack 302 is provided on the outer surface of the sliding frame 301. The driving gear 303 meshes with the outer surface of the tooth rack 302, and a stepping motor 304 is provided in the middle of the driving gear 303. The sliding frame 301 is slidably connected to the slide rail 2, and the sliding frame 301 and the slide rail 2 are concentrically distributed;

[0033] The specific operation is as follows. Through the mutual cooperation between the mounting frame 1 and the driving component 3, the sliding frame 301 in the driving component 3 is slidably connected in the slide rail 2 on the upper surface of the mounting frame 1. At the same time, with the tooth rack 302 provided on the outer surface of the sliding frame 301, when the stepping motor 304 drives the driving gear 303 to rotate, the driving gear 303 drives the tooth rack 302 engaged with it, and then drives the sliding frame 301 to slide on the surface of the slide rail 2. The rotating sliding frame 301 drives the placement component 4 and the detection component 5 to rotate, not only enabling the equipment to be adjusted at multiple angles but also realizing dynamic detection, improving the detection range and reducing the monitoring dead angle;

[0034] Please refer to Figure 2 , Figure 4 and Figure 5, the placement component 4 includes a connecting block 401, a telescopic spring 402, a clamping block 403, a placement frame 404 and a groove 405, and the telescopic spring 402 is embedded on both sides of the connecting block 401, the end of the telescopic spring 402 away from the connecting block 401 is connected to the clamping block 403, the top of the connecting block 401 is connected to the placement frame 404, and the surface of the placement frame 404 is provided with a groove 405, the placement component 4 also includes a micro push rod 406, a transfer block 407 and a placement platform 408, and the micro push rod 406 is connected to the right side of the placement frame 404, the output end of the micro push rod 406 is connected to the transfer block 407, and the end of the transfer block 407 away from the micro push rod 406 is connected to the placement platform 408, the placement platform 408 is slidably connected to the placement frame 404, and the external dimensions of the placement platform 408 are consistent with the internal dimensions of the placement frame 404, and the placement platform 408 is a rectangular structure;

[0035] The specific operation is as follows: through the setting of the placement component 4, the placement component 4 uses the card blocks 403 on both sides of the connecting block 401 to be inserted and engaged on the top of the sliding frame 301, and uses the drive of the micro push rod 406 to make the adapter block 407 push the placement table 408 to slide in the groove 405 on the surface of the placement frame 404, which is used to realize the adjustment of the height of the detection equipment, improve the versatility of the equipment, and enable the equipment to be used in different working environments.

[0036] See also Figure 2 , Figure 4 and Figure 6 , the detection component 5 includes a detection box 501, a single-chip microcomputer 502, a damping shaft frame 503, a support frame 504, a rotating bracket 505 and a near-infrared light source 506, and the detection box 501 is provided with a single-chip microcomputer 502 inside, the detection box 501 is provided with a damping shaft frame 503 on the outer surface, and the outer surface of the damping shaft frame 503 is provided with a support frame 504, the outer end of the support frame 504 is connected to the rotating bracket 505, and the rotating bracket 505 is installed with a near-infrared light source 506 inside, the detection component 5 also includes a telescopic tube 507 and a near-infrared micro camera 508, and the surface of the support frame 504 is connected to the telescopic tube 507, and the end of the telescopic tube 507 away from the support frame 504 is connected to the near-infrared micro camera 508, the single-chip microcomputer 502 is electrically connected to the display screen 6, and the outer surface of the display screen 6 is provided with a protective component 16;

[0037] The specific operation is as follows. Through the mutual cooperation setting between the detection component 5 and the placement component 4, the detection box 501 in the detection component 5 is connected to the surface of the placement table 408. The application angle of the support frame 504 can be freely adjusted by using the damping rotating shaft frame 503. At the same time, a rotating bracket 505 and a near-infrared light source 506 are arranged at the outer end of the support frame 504, so that the near-infrared light source 506 can also be freely adjusted for convenient use. The telescopic tube 507 made of stainless steel material can adjust the detection position of the near-infrared micro camera 508. With the setting of the single-chip microcomputer 502, a transmission module and a conversion module are embedded on the surface of the single-chip microcomputer 502. The state information of the injection molding machine mold is photographed by the near-infrared micro camera 508 and transmitted to the display screen 6 for display, which is convenient for the detection staff to view.

[0038] Please refer to Figure 1 and Figure 7 For the protection component 16, it includes a sliding protection cover 1601, a magnetic strip 1602 and an alarm light strip 1603. The end of the sliding protection cover 1601 is connected to the sliding protection cover 1601, and an alarm light strip 1603 is arranged on the outer surface of the sliding protection cover 1601.

[0039] The specific operation is as follows. The display screen 6 is used to provide the picture taken by the near-infrared micro camera 508 for the staff to view. And a protection component 16 is arranged on the outer surface of the display screen 6. The sliding protection cover 1601 in the protection component 16 is slidably connected to the outer surface of the display screen 6. The magnetic strip 1602 facilitates the opening and closing mode of the sliding protection cover 1601. And an alarm light strip 1603 is arranged on the surface of the sliding protection cover 1601. When the near-infrared micro camera 508 detects an abnormal state of the injection molding machine mold, the single-chip microcomputer 502 issues an instruction to the alarm light strip 1603 to warn the staff.

[0040] In summary, for the dynamic feedback type injection molding machine mold status detection system based on machine vision, during use, first install the mounting frame 1 on the outside of the injection molding machine. The reset spring 13 and the stabilizing block 14 can pre-clamp the injection molding machine and use the limit airbag 15 to improve the tightness of its fit with the outer surface of the injection molding machine. The mounting frame 1 has an arc-shaped structure, and a protective silica gel pad 12 is provided on the inner wall of its top to prevent scratching of the outer surface of the injection molding machine. Then, rotate the handle screw 9 to push the limit plate 10, so that the two limit plates 10 move towards the middle of the mounting frame 1 to clamp the injection molding machine equipment, making the equipment connected to the outside of the injection molding machine convenient for disassembly and installation. At the same time, a rubber pad 11 is adhered to the outer surface of the limit plate 10 to further increase the friction coefficient with the outer surface of the injection molding machine. Then, since the sliding frame 301 in the drive assembly 3 is slidably connected to the slide rail 2 on the upper surface of the mounting frame 1, when the stepper motor 304 is turned on and the drive gear 303 rotates driven by the stepper motor 304, the drive gear 303 drives the tooth rack 302 engaged with it, and then drives the sliding frame 301 to slide on the surface of the slide rail 2. The rotating sliding frame 301 drives the placement assembly 4 and the detection assembly 5 to rotate, not only enabling the device to be adjusted at multiple angles but also realizing dynamic detection, expanding the detection range and reducing the monitoring blind spots. Then, driven by the micro-push rod 406 in the placement assembly 4, the adapter block 407 pushes the placement table 408 to slide in the groove 405 on the surface of the placement frame 404 to adjust the height of the detection device. The connecting block 401 in the placement assembly 4 is inserted and clamped on the top of the sliding frame 301 through the two clamping blocks 403, facilitating the later maintenance and repair process. Finally, the damping rotating shaft frame 503 can freely adjust the application angle of the support frame 504. At the same time, a rotating bracket 505 and a near-infrared light source 506 are provided at the outer end of the support frame 504, enabling the near-infrared light source 506 to be freely adjusted for convenient use. The telescopic tube 507 made of stainless steel material can adjust the detection position of the near-infrared micro-camera 508. With the setting of the single-chip microcomputer 502, a transmission module and a conversion module are embedded on the surface of the single-chip microcomputer 502. The near-infrared micro-camera 508 captures the status information of the injection molding machine mold and transmits it to the display screen 6 for display, facilitating the inspection staff to view. Combined with the protection component 16 provided on the outer surface of the display screen 6, the sliding protection cover 1601 in the protection component 16 is slidably connected to the outer surface of the display screen 6, and the magnetic strip 1602 facilitates the opening and closing of the sliding protection cover 1601. An alarm light bar 1603 is provided on the surface of the sliding protection cover 1601. When the near-infrared micro-camera 508 detects an abnormal status of the injection molding machine mold, the single-chip microcomputer 502 issues an instruction to the alarm light bar 1603 to warn the staff, realizing the feedback of the detection.

Claims

1. A dynamic feedback type injection molding machine mold state detection system based on machine vision, characterized in that The invention comprises a mounting frame (1) and a display screen (6), wherein a slide rail (2) is installed inside the mounting frame (1), and a driving component (3) is slidably connected to the surface of the slide rail (2), the top of the driving component (3) is connected to a placement component (4), and a detection component (5) is installed on the top of the placement component (4), the display screen (6) is electrically connected to the output end of the detection component (5), and a protective angle seat (7) is arranged on the outer surface of the display screen (6), the driving component (3) comprises a sliding frame (301), a gear rack (302), a driving gear (303) and a stepping motor (304), and the outer surface of the sliding frame (301) is provided with the gear rack (302), the outer surface of the gear rack (302) is meshed with the driving gear (303), and the driving gear (303) is meshed with the outer surface of the gear rack (302), and the driving gear (303) is meshed with the outer surface of the gear rack (302), and the driving gear (303) is meshed with the outer surface of the gear rack (302). ) is provided with the stepping motor (304) in the middle part, the sliding frame (301) is slidably connected to the slide rail (2), and the sliding frame (301) and the slide rail (2) are distributed in concentric circles, a limit block (8) is installed at the bottom of the mounting frame (1), and a handle screw (9) is threadedly connected to the middle part of the limit block (8), one end of the handle screw (9) is rotatably connected to the limit plate (10), and a rubber pad (11) is bonded to the outer surface of the limit plate (10), a protective silicone pad (12) is provided on the inner wall of the top of the mounting frame (1), and reset springs (13) are embedded on both sides of the inner wall of the mounting frame (1), the end of the reset spring (13) away from the mounting frame (1) is connected to a stabilizing block (14), and a limit air bag (15) is provided inside the stabilizing block (14).

2. The dynamic feedback type injection molding machine mold state detection system based on machine vision according to claim 1, characterized in that, The placement assembly (4) comprises a connecting block (401), a telescopic spring (402), a clamping block (403), a placement frame (404) and a groove (405), wherein the telescopic spring (402) is embedded on both sides of the connecting block (401), the clamping block (403) is connected to one end of the telescopic spring (402) away from the connecting block (401), the placement frame (404) is connected to the top of the connecting block (401), and the groove (405) is provided on the surface of the placement frame (404).

3. The dynamic feedback type injection molding machine mold state detection system based on machine vision according to claim 2, wherein The placement assembly (4) further comprises a micro push rod (406), a transfer block (407) and a placement platform (408), wherein the micro push rod (406) is connected to the right side of the placement frame (404), the output end of the micro push rod (406) is connected to the transfer block (407), and the end of the transfer block (407) away from the micro push rod (406) is connected to the placement platform (408).

4. The dynamic feedback type injection molding machine mold state detection system based on machine vision according to claim 3, wherein The placement platform (408) is slidably connected to the placement frame (404), the external dimensions of the placement platform (408) are consistent with the internal dimensions of the placement frame (404), and the placement platform (408) is in a rectangular structure.

5. The dynamic feedback type injection molding machine mold state detection system based on machine vision according to claim 1, wherein The detection component (5) includes a detection box (501), a single-chip microcomputer (502), a damping rotating shaft bracket (503), a support bracket (504), a rotating bracket (505), and a near-infrared light source (506). The single-chip microcomputer (502) is arranged inside the detection box (501), the damping rotating shaft bracket (503) is arranged on the outer surface of the detection box (501), the support bracket (504) is arranged on the outer surface of the damping rotating shaft bracket (503), the outer end of the support bracket (504) is connected to the rotating bracket (505), and the near-infrared light source (506) is installed inside the rotating bracket (505).

6. The dynamic feedback type injection molding machine mold state detection system based on machine vision according to claim 5, characterized in that, The detection component (5) further includes a telescopic tube (507) and a near-infrared micro camera (508). The telescopic tube (507) is connected to the surface of the support bracket (504), and one end of the telescopic tube (507) away from the support bracket (504) is connected to the near-infrared micro camera (508).

7. The dynamic feedback type injection molding machine mold state detection system based on machine vision according to claim 5, characterized in that, The single-chip microcomputer (502) is electrically connected to the display screen (6), and a protection component (16) is arranged on the outer surface of the display screen (6).

8. The dynamic feedback type injection molding machine mold state detection system based on machine vision according to claim 7, wherein The protection component (16) includes a sliding protection cover (1601), a magnetic attraction strip (1602), and an alarm light strip (1603). The end of the sliding protection cover (1601) is connected to the sliding protection cover (1601), and the alarm light strip (1603) is arranged on the outer surface of the sliding protection cover (1601).

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