Reflection type laser sensor

Abstract

The utility model discloses a reflection-type laser sensor, which relates to the technical field of laser sensors and comprises a casing, a laser transmitter, a photoelectric detector and a signal processing module are mounted at the bottom end of the inner side of the casing, a square opening is formed in the top end of the casing and communicated with the inner side of the casing, and the laser transmitter, the photoelectric detector and the signal processing module are arranged in the casing. The top end of the machine shell is slidably connected with a top cover, the top cover covers the top end of the square opening, and a second screw hole is formed in the top end of the top cover. By adopting the structure, when the top cover needs to be detached, a user can screw the second bolt out of the second screw hole, after the second bolt is detached, the user can directly pull out the top cover according to the sliding principle, and due to the arrangement of the square opening, the user can directly check the inner side of the shell through the square opening, so that the operation is convenient. Therefore, a user can conveniently observe the workpiece on the inner side of the machine shell at any time, and meanwhile the maintenance efficiency of the user on the workpiece on the inner side of the machine shell in the later period is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser sensors, and particularly relates to a reflective laser sensor. Background Art

[0002] The main components of the reflective laser sensor include laser, optical system, photodetector and signal processing circuit. When working, the laser emits a laser beam, which is focused by the optical system and irradiated onto the target object. The target object reflects the laser beam back, which is then collected and focused onto the photodetector by the optical system. The photodetector converts the light signal into an electrical signal. After being processed by the signal processing circuit, the required measurement data can be obtained.

[0003] The Chinese patent with the publication number "CN218123958U" discloses a laser particle sensor. Its purpose is to provide a laser sensor with high performance and low cost. The utility model laser sensor includes a circuit board, on which a laser module and a silicon photodiode are installed, the laser module is located above the silicon photodiode, and a light trap structure with an inner concave angle is arranged below the silicon photodiode. The light trap structure includes a downward sharp angle less than 60 degrees, and the sharp angle forms an isosceles triangle with the inner wall of the light trap structure.

[0004] However, the existing laser sensors still have some shortcomings. Since the shells of the existing laser sensors are mostly integrated, the installation method of the top shell of the laser sensor is mostly to first clamp the shell and limit it by means of a clamping piece, and then screw in bolts to fix its position by threading. When the shell on the top of the laser sensor needs to be removed, the user needs to first unscrew all the corresponding bolts, and then forcefully push the shell of the laser sensor to push it out of the clamping position before it can be removed. While reducing the efficiency of disassembling the laser sensor shell, it also reduces the efficiency of maintaining the workpiece inside the laser sensor shell in the later stage. Utility Model Content

[0005] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a reflective laser sensor to solve the problems mentioned in the background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A reflective laser sensor comprises a housing, a laser emitter, a photoelectric detector and a signal processing module are installed at the inner bottom of the housing, a square opening is provided at the top of the housing, the square opening is communicated with the inner side of the housing, a top cover is slidably connected to the top of the housing, the top cover covers the top of the square opening, a second screw hole is provided at the top of the top cover, the second screw hole penetrates the top cover and the top of the housing, a second bolt is threadedly connected to the inner side of the second screw hole, the bottom end of the second bolt is threadedly connected to the inside of the housing through the second screw hole, a protective plate is threadedly connected to one side of the housing, a protective frame is fixedly connected to one side of the protective plate, and an optical component is installed on one side of the protective plate The optical component is located on the inner side of the protective frame, and a protective cover is threadedly connected to one side of the protective frame. The protective cover covers one side of the protective frame. The position of the optical component is symmetrical to that of the protective frame. By screwing in the second bolt, the position of the top cover can be effectively limited and fixed. When the top cover needs to be removed, the user can first screw the second bolt out of the second screw hole, and then directly pull the top cover down through the sliding principle. After the top cover is removed, the user can directly view the workpiece inside the casing through the square opening. While facilitating the disassembly and assembly of the top cover, it is also more conducive to the user's later maintenance of the workpiece inside the casing.

[0008] As a preferred technical solution, a first slide groove matching the top cover is provided at the top of the casing, and the top cover is slidably connected to the top of the casing through the first slide groove, and a protrusion is fixedly connected to the top of the top cover, the shape of the protrusion is T-shaped, and the shape of the corner of the protrusion is arc-shaped, and a rectangular opening is provided at the top of the top cover, and the rectangular opening passes through the top cover, and the position of the rectangular opening is symmetrical to the position of the square opening, and a protective glass is fixedly connected to the inner side of the rectangular opening, and the protective glass covers the inner side of the rectangular opening, and the position of the protective glass is symmetrical to the position of the laser emitter. Through the opening of the first slide groove, the top cover is convenient to slide on the top of the casing, and its protrusion can provide the user with a gripping point, and it will be more convenient and quick to pull the top cover to move through the protrusion. Due to the opening of the rectangular opening, the user can directly view the workpiece inside the casing through the protective glass without opening the top cover, so that it is convenient for the user to always understand the operation status of the workpiece.

[0009] As an optimal technical solution, a first screw hole is provided on one side of the protective plate, and the first screw holes penetrate the protective plate and one side of the casing, the inner side of the first screw hole is threadedly connected with a first bolt, and the other side of the first bolt is threadedly connected to the inside of the casing through the first screw hole, the protective plate is threadedly connected to one side of the casing through the first screw hole and the first bolt, and the other side of the protective plate is fixedly connected with a sealing ring, the first bolt is located on the outside close to the sealing ring, and a limiting groove matching the sealing ring is provided on one side of the casing, the sealing ring is located on the inner side of the limiting groove, and the sealing ring covers the inner side of the limiting groove. Due to the existence of the protective plate, the workpiece inside the casing can be effectively protected, and the protective plate is fixed with threads. When the protective plate needs to be removed, the first bolt can be screwed out of the first screw hole, thereby achieving the purpose of convenient disassembly and assembly of the protective plate, and when the protective plate is installed, the sealing ring can completely seal the connection point between the protective plate and the casing, thereby effectively improving the sealing of the fixed position of the protective plate.

[0010] As a preferred technical solution, a connecting frame is fixedly connected to the other side of the protective cover, an external thread is provided on the outer wall of the connecting frame, and a thread groove matching the external thread is provided on one side of the protective frame. The protective cover is threadedly connected to one side of the protective frame through the connecting frame and the thread groove. Because the protective cover is threadedly fixed to one side of the protective frame, when the protective cover needs to be removed, the connecting frame can be unscrewed through the thread principle. After the protective cover is removed, its optical components will be exposed, thereby facilitating the user to check and maintain the optical components.

[0011] As a preferred technical solution, a sealing strip is fixedly connected to the outer wall of the connecting frame, covering the outer wall of the connecting frame, and the other side of the sealing strip is in contact with one side of the protective frame. Due to the presence of the sealing strip, the sealing strip can effectively seal the connection point between the protective frame and the protective cover, thereby achieving a good sealing and waterproof effect.

[0012] As an optimal technical solution, a vent is provided at the bottom end of the casing, the vent is communicated with the inner side of the casing, a second slide groove is provided on the inner wall of the vent, a filter plate is slidably connected to the inner wall of the vent, the filter plate is slidably connected to the inner wall of the vent through the second slide groove, the filter plate covers the inner side of the vent, a dustproof cloth is pasted on the bottom end of the filter plate, the dustproof cloth covers the bottom end of the filter plate, a baffle is clamped at the bottom end of the casing, the bottom end of the dustproof cloth is attached to the top end of the baffle, due to the opening of the vent, it is convenient to ventilate the inside of the casing, the filter plate can effectively filter the circulating air, and the dustproof cloth can block the dust and pollutants circulating in the air, which can play an effective protective role and facilitate the heat dissipation of the inner side of the casing, thereby effectively improving the service life of the workpiece inside the casing.

[0013] As a preferred technical solution, the top of the baffle is fixedly connected with a card block, and the bottom end of the casing is provided with a card slot matching the card block, the card block is carded into the inside of the card slot, and the baffle is carded to the bottom end of the casing through the card block and the card slot. Due to the existence of the baffle, the bottom end of the filter plate can be blocked, and the filter plate can be prevented from falling through the second slide groove. When the filter plate needs to be removed, the baffle is removed through the card connection principle, and then the filter plate can be directly pulled out through the second slide groove, thereby achieving the purpose of facilitating the disassembly and assembly of the filter plate.

[0014] In summary, the utility model mainly has the following beneficial effects:

[0015] First, during use, the top cover can provide good protection for the workpiece inside the casing, and the protective cover can provide good protection for the optical components. When the top cover needs to be removed, the user can first screw the second bolt out of the second screw hole. After the second bolt is removed, the user can directly pull open the top cover through the sliding principle. Due to the opening of the square opening, the user can directly view the inside of the casing through the square opening, which is convenient for the user to observe the workpiece inside the casing at all times, and also effectively improves the user's maintenance efficiency of the workpiece inside the casing in the later stage;

[0016] Second, because the protective plate is threadedly fixed to one side of the casing, when the protective plate needs to be removed, the first bolt can be screwed out of the first screw hole. After the protective plate is removed, its optical component will also be taken out together, and the workpiece inside the casing will also be exposed for processing, so it is convenient for users to check or disassemble these workpieces. When the protective plate is installed, its sealing ring can effectively seal the connection point between the protective plate and the casing, thereby preventing water from flowing into the inside of the casing through the connection point between the two, which can effectively improve the overall protection of the casing;

[0017] Thirdly, due to the opening of the vents, it is convenient to ventilate the inside of the casing, and the filter plate can effectively filter the circulating air, and the dustproof cloth can block the dust and pollutants circulating in the air, which can play an effective protective role and facilitate the heat dissipation of the inside of the casing, thereby effectively improving the service life of the workpiece inside the casing. When the filter plate needs to be removed, the baffle plate can be removed through the snap-on principle, and then the filter plate can be directly pulled out through the second slide slot, thereby achieving the purpose of facilitating the disassembly and assembly of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the protection frame structure of the utility model;

[0020] Figure 3It is a schematic diagram of the protective cover structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of the protective plate of the utility model;

[0022] Figure 5 It is a schematic diagram of the inner structure of the casing of the utility model;

[0023] Figure 6 It is a schematic diagram of the bottom structure of the utility model;

[0024] Figure 7 It is a schematic diagram of the inner structure of the vent of the utility model;

[0025] Figure 8 It is a schematic diagram of the baffle structure of the utility model.

[0026] Figure numerals: 1, housing, 2, laser emitter, 3, photoelectric detector, 4, signal processing module, 5, protective plate, 6, first screw hole, 7, first bolt, 8, sealing ring, 9, limit groove, 10, protective frame, 11, optical component, 12, threaded groove, 13, protective cover, 14, connecting frame, 15, sealing strip, 16, external thread, 17, first slide groove, 18, top cover, 19, bump, 20, rectangular mouth, 21, protective glass, 22, second screw hole, 23, second bolt, 24, square mouth, 25, vent, 26, filter plate, 27, second slide groove, 28, dustproof cloth, 29, slot, 30, baffle, 31, block. DETAILED DESCRIPTION

[0027] refer to Figures 1 to 8A reflective laser sensor described in this embodiment includes a housing 1, a laser emitter 2, a photodetector 3, and a signal processing module 4 are installed at the inner bottom of the housing 1, a square opening 24 is opened at the top of the housing 1, and the square opening 24 is communicated with the inner side of the housing 1, a top cover 18 is slidably connected to the top of the housing 1, and the top cover 18 covers the top of the square opening 24, and a second screw hole 22 is opened at the top of the top cover 18, and the second screw hole 22 passes through the top cover 18 and the top of the housing 1, and the inner side of the second screw hole 22 is threadedly connected with a second bolt 23, and the bottom end of the second bolt 23 is threadedly connected to the inside of the housing 1 through the second screw hole 22, and a protective plate 5 is threadedly connected to one side of the housing 1, and the protective plate 5 is threadedly connected to the protective plate 5. A protective frame 10 is fixedly connected to one side of the plate 5, an optical component 11 is installed on one side of the protective plate 5, the optical component 11 is located on the inner side of the protective frame 10, a protective cover 13 is threadedly connected to one side of the protective frame 10, the protective cover 13 covers one side of the protective frame 10, and the position of the optical component 11 is symmetrical to the position of the protective frame 10. The structure of the reflective laser sensor mainly consists of a laser emitter 2, a photodetector 3, a signal processing module 4, and an optical component 11. The laser emitter 2 is the core component of the reflective laser sensor and is responsible for generating a laser beam. The laser emitter 2 is usually composed of a laser diode or a solid-state laser, and can emit a high-energy, monochromatic, single-frequency laser beam. These After being modulated in a specific way, the laser beam is directed toward the object to be measured. The optical component 11 is mainly composed of lenses, reflectors, gratings, etc., which are responsible for controlling and adjusting the direction, focusing and dispersion of the laser beam. These components ensure that the laser beam is irradiated onto the target object in the best way and collects the reflected light. The photodetector 3 is a key component for receiving the reflected laser. When the laser beam is reflected from the target object, the photodetector 3 receives the light and converts it into an electrical signal. Commonly used photodetectors 3 include photodiodes and phototransistors. The signal processing circuit is responsible for amplifying, filtering and converting the electrical signal output by the photodetector 3 in order to extract the required measurement data. These circuits may include amplifiers, filters, analog-to-digital converters, etc. Due to the presence of the top cover 18 and the protective cover 13, the top cover 18 can provide good protection for the workpiece inside the casing 1, and the protective cover 13 can provide good protection for the optical component 11, thereby effectively improving the service life of the workpiece inside the casing 1. When the top cover 18 needs to be removed, the user can first unscrew the second bolt 23 out of the second screw hole 22. When the second bolt 23 is removed, the user can directly pull open the top cover 18 through the sliding principle, and then the user can directly view the inside of the casing 1 through the square opening 24, thereby facilitating the user to quickly observe or maintain the workpiece inside the casing 1.

[0028] refer to Figure 1 and Figure 2 and Figure 5The top of the housing 1 is provided with a first slide groove 17 matching with the top cover 18. The top cover 18 is slidably connected to the top of the housing 1 through the first slide groove 17. The top of the top cover 18 is fixedly connected with a protrusion 19. The shape of the protrusion 19 is T-shaped, and the shape of the corner of the protrusion 19 is arc-shaped. The top of the top cover 18 is provided with a rectangular opening 20. The rectangular opening 20 penetrates the top cover 18. The position of the rectangular opening 20 is symmetrical with the position of the square opening 24. A protective glass 21 is fixedly connected to the inner side of the rectangular opening 20. The protective glass 21 covers the inner side of the rectangular opening 20. The position of the protective glass 21 is symmetrical with the position of the laser emitter 2. Due to the opening of the first slide groove 17, This makes it easier for the top cover 18 to slide on the top of the casing 1, and also effectively limits the sliding angle of the top cover 18. The protrusion 19 can provide a user with a gripping point, and it is more convenient and quick to pull the top cover 18 through the protrusion 19, which is more conducive to the user's later disassembly and assembly of the top cover 18. Due to the opening of the rectangular opening 20, the user can directly view the inside of the casing 1 through the protective glass 21 without opening the top cover 18, so that the user can observe the workpiece inside the casing 1 at all times. If a fault occurs, the user can also be informed in time, thereby effectively improving the protection of the workpiece inside the casing 1.

[0029] refer to Figures 1 to 5 A first screw hole 6 is provided on one side of the protective plate 5, and the first screw holes 6 penetrate the protective plate 5 and one side of the housing 1. A first bolt 7 is threadedly connected to the inner side of the first screw hole 6, and the other side of the first bolt 7 is threadedly connected to the inside of the housing 1 through the first screw hole 6. The protective plate 5 is threadedly connected to one side of the housing 1 through the first screw hole 6 and the first bolt 7. A sealing ring 8 is fixedly connected to the other side of the protective plate 5. The first bolt 7 is located close to the outer side of the sealing ring 8. A limiting groove 9 matching the sealing ring 8 is provided on one side of the housing 1. The sealing ring 8 is located on the inner side of the limiting groove 9, and the sealing ring 8 covers the inner side of the limiting groove 9. , because the protective plate 5 is threadedly fixed on one side of the casing 1, when the protective plate 5 needs to be removed, the first bolt 7 can be screwed out of the first screw hole 6. After the protective plate 5 is removed, its optical component 11 will also be taken out together, and the workpiece inside the casing 1 will also be exposed for processing, so it is convenient for users to check or disassemble these workpieces. When the protective plate 5 is installed, its sealing ring 8 can effectively seal the connection point between the protective plate 5 and the casing 1, thereby preventing water from flowing into the inside of the casing 1 through the connection point between the two, and can effectively improve the overall sealing and waterproof ability of the casing 1.

[0030] refer to Figures 1 to 3The other side of the protective cover 13 is fixedly connected to a connecting frame 14, an external thread 16 is provided on the outer wall of the connecting frame 14, and a thread groove 12 matching the external thread 16 is provided on one side of the protective frame 10. The protective cover 13 is threadedly connected to one side of the protective frame 10 through the connecting frame 14 and the thread groove 12. A sealing strip 15 is fixedly connected to the outer wall of the connecting frame 14, and the sealing strip 15 covers the outer wall of the connecting frame 14. The other side of the sealing strip 15 is attached to one side of the protective frame 10. Because the protective cover 13 is also fixed by threads, when it is necessary to remove the protective cover 13, the user can remove the protective cover 13 by screwing the connecting frame 14 out of the thread groove 12 through the thread principle. After the protective cover 13 is removed, the entire optical component 11 will also be removed together, so it is also convenient for the user to check and maintain the optical component 11. Due to the existence of the sealing strip 15, when the connecting frame 14 is installed, the sealing strip 15 can also seal the connection point between the two, so as to achieve a good sealing and protection effect.

[0031] refer to Figures 6 to 8 The bottom end of the casing 1 is provided with a vent 25, which is communicated with the inner side of the casing 1, and a second slide groove 27 is provided on the inner wall of the vent 25. A filter plate 26 is slidably connected to the inner wall of the vent 25, and the filter plate 26 is slidably connected to the inner wall of the vent 25 through the second slide groove 27. The filter plate 26 covers the inner side of the vent 25, and a dustproof cloth 28 is pasted on the bottom end of the filter plate 26. The dustproof cloth 28 covers the bottom end of the filter plate 26. A baffle plate 30 is clamped at the bottom end of the casing 1, and the bottom end of the dustproof cloth 28 is attached to the top end of the baffle plate 30. Due to the opening of the vent 25, it is convenient to ventilate the inside of the casing 1, and the filter plate 26 can effectively filter the circulating air, and the dustproof cloth 28 can block the dust and pollutants circulating in the air, which can play an effective protective role and facilitate the heat dissipation of the inner side of the casing 1, thereby effectively improving the service life of the workpiece inside the casing 1.

[0032] refer to Figure 8 The top of the baffle 30 is fixedly connected with a block 31, and the bottom of the casing 1 is provided with a slot 29 matching the block 31. The block 31 is snapped into the inside of the slot 29, and the baffle 30 is snapped into the bottom of the casing 1 through the block 31 and the slot 29. When the filter plate 26 needs to be removed, the baffle 30 is removed through the snap-on principle, and then the filter plate 26 can be directly pulled out through the second slide groove 27, thereby achieving the purpose of convenient disassembly and assembly of the filter plate 26.

[0033] Principle and advantages of use: When the top cover 18 needs to be removed, the user can first screw the second bolt 23 out of the second screw hole 22. When the second bolt 23 is removed, the user can directly pull out the top cover 18 through the sliding principle, and then the user can directly view the inside of the casing 1 through the square opening 24, so that it is convenient for the user to quickly observe or maintain the workpiece inside the casing 1. Due to the opening of the first slide groove 17, it is convenient for the top cover 18 to slide on the top of the casing 1, and it can also effectively limit the sliding angle of the top cover 18. The convex block 19 can provide the user with a gripping point. It is more convenient and quick to pull the top cover 18 through the convex block 19, so it is more conducive to the user's later The top cover 18 is disassembled and assembled during the period. Due to the opening of the rectangular opening 20, the user can directly view the inside of the casing 1 through the protective glass 21 without opening the top cover 18, so that the user can observe the workpiece inside the casing 1 at all times. If a fault occurs, the user can also be informed in time, thereby effectively improving the protection of the workpiece inside the casing 1. Because the protective plate 5 is threadedly fixed to one side of the casing 1, when the protective plate 5 needs to be removed, the first bolt 7 is screwed out of the first screw hole 6. After the protective plate 5 is removed, its optical component 11 will also be taken out together, and the workpiece inside the casing 1 will also be exposed, so it is convenient for the user to handle these workpieces. Inspection or disassembly, when the protective plate 5 is installed, its sealing ring 8 can effectively seal the connection point between the protective plate 5 and the casing 1, thereby preventing water from flowing into the inner side of the casing 1 through the connection point between the two, and effectively improving the overall sealing and waterproof ability of the casing 1. Because the protective cover 13 is also fixed by threads, when the protective cover 13 needs to be removed, the user can remove the protective cover 13 by screwing the connecting frame 14 out of the thread groove 12 through the thread principle. After the protective cover 13 is removed, the entire optical component 11 will also be removed together, so it is also convenient for the user to inspect and maintain the optical component 11. Due to the existence of the sealing strip 15, when the connecting frame 14 is installed , and its sealing strip 15 can also seal the connection point between the two, so as to achieve a good sealing and protective effect. Due to the opening of the vent 25, it is convenient to ventilate the inner side of the casing 1, and its filter plate 26 can effectively filter the circulating air, and its dustproof cloth 28 can block the dust and pollutants circulating in the air, which can play an effective protective role and facilitate the heat dissipation of the inner side of the casing 1, thereby effectively improving the service life of the workpiece inside the casing 1. When the filter plate 26 needs to be removed, the baffle 30 is removed by the snap-on principle, and then the filter plate 26 can be directly pulled out through the second slide groove 27, so as to achieve the purpose of facilitating the disassembly and assembly of the filter plate 26.

Claims

1. A reflective laser sensor, comprising a housing, characterized in that: A laser emitter, a photoelectric detector and a signal processing module are installed at the bottom inner end of the casing; a square opening is provided at the top end of the casing, and the square opening is communicated with the inner side of the casing; a top cover is slidably connected to the top end of the casing, and the top cover covers the top end of the square opening; a second screw hole is provided at the top end of the top cover, and the second screw hole passes through the top cover and the top end of the casing; a second bolt is threadedly connected to the inner side of the second screw hole, and the bottom end of the second bolt is threadedly connected to the inside of the casing through the second screw hole; a protective plate is threadedly connected to one side of the casing, and a protective frame is fixedly connected to one side of the protective plate; an optical component is installed on one side of the protective plate, and the optical component is located on the inner side of the protective frame; a protective cover is threadedly connected to one side of the protective frame, and the protective cover covers one side of the protective frame; the position of the optical component is symmetrical to that of the protective frame.

2. A reflective laser sensor according to claim 1, characterized in that: The top of the casing is provided with a first slide groove matching the top cover, the top cover is slidably connected to the top of the casing through the first slide groove, the top of the top cover is fixedly connected with a protrusion, the shape of the protrusion is T-shaped, and the shape of the corner of the protrusion is arc-shaped.

3. A reflective laser sensor according to claim 1, characterized in that: A rectangular opening is provided at the top of the top cover, and the rectangular opening passes through the top cover. The position of the rectangular opening is symmetrical to the position of the square opening. A protective glass is fixedly connected to the inner side of the rectangular opening, and the protective glass covers the inner side of the rectangular opening. The position of the protective glass is symmetrical to the position of the laser emitter.

4. A reflective laser sensor according to claim 1, characterized in that: A first screw hole is provided on one side of the protective plate, and the first screw hole passes through the protective plate and one side of the casing. A first bolt is threadedly connected to the inner side of the first screw hole, and the other side of the first bolt is threadedly connected to the inside of the casing through the first screw hole. The protective plate is threadedly connected to one side of the casing through the first screw hole and the first bolt.

5. A reflective laser sensor according to claim 4, characterized in that: A sealing ring is fixedly connected to the other side of the protective plate, the first bolt is located close to the outside of the sealing ring, a limiting groove matching the sealing ring is opened on one side of the housing, the sealing ring is located on the inner side of the limiting groove, and the sealing ring covers the inner side of the limiting groove.

6. A reflective laser sensor according to claim 1, characterized in that: The other side of the protective cover is fixedly connected to a connecting frame, an outer wall of the connecting frame is provided with an external thread, one side of the protective frame is provided with a thread groove matching the external thread, and the protective cover is threadedly connected to one side of the protective frame through the connecting frame and the thread groove.

7. A reflective laser sensor according to claim 6, characterized in that: A sealing strip is fixedly connected to the outer wall of the connection frame, and the sealing strip covers the outer wall of the connection frame. The other side of the sealing strip is in contact with one side of the protection frame.

8. A reflective laser sensor according to claim 1, characterized in that: A vent is provided at the bottom end of the casing, and the vent is communicated with the inner side of the casing. A second slide groove is provided on the inner wall of the vent, and a filter plate is slidably connected to the inner wall of the vent. The filter plate is slidably connected to the inner wall of the vent through the second slide groove, and the filter plate covers the inner side of the vent. A dustproof cloth is pasted on the bottom end of the filter plate, and the dustproof cloth covers the bottom end of the filter plate. A baffle is clamped on the bottom end of the casing, and the bottom end of the dustproof cloth is in contact with the top end of the baffle.

9. A reflective laser sensor according to claim 8, characterized in that: The top of the baffle is fixedly connected with a card block, the bottom of the housing is provided with a card slot matching the card block, the card block is carded inside the card slot, and the baffle is carded to the bottom of the housing through the card block and the card slot.

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