Laser drilling detection device

By introducing an adjustable fill light device into the laser drilling detection device, the problem of poor light rays in the laser drilling station is solved, the quality and flexibility of image acquisition are improved, and the accuracy and convenience of detection are ensured.

CN222211562UActive Publication Date: 2024-12-20CHENGDU SHUNZEZHI TECH CO LTD +1
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Patent Information

Application Number
CN202420838069.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-22
Publication Date
2024-12-20
Estimated Expiration
2034-04-22

AI Technical Summary

Technical Problem

During the process of drilling the cigarette laser, poor light at the laser drilling station leads to unclear shooting of the camera, affecting the quality of image acquisition.

Method used

A laser hole drilling detection device including a fill light device is designed, which is connected to the bracket through a rotating member and a slider, and the angle and position of the fill light device are flexibly adjusted to provide uniform light to ensure that the image acquisition device can clearly capture the hole drilling details. .

Benefits of technology

It effectively solves the problem of poor light, improves the quality and flexibility of image acquisition, adapts to different punching positions and light conditions, and improves the accuracy and convenience of detection.

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Abstract

The utility model discloses a laser drilling detection device which comprises a laser drilling device, the laser drilling device comprises a drilling wheel, a beam splitter and a support, the support is arranged above the drilling wheel, the beam splitter is arranged on the support and used for drilling a target on the drilling wheel, and the laser drilling detection device further comprises a second support and a third support, a first shell is arranged on the side, facing the punching position, of the second support, an image collecting device is arranged in the first shell, and a lens of the image collecting device penetrates through the side wall of the shell and faces the punching position. Third supports and a light supplementing device are oppositely arranged on the side wall of the shell, the light supplementing device is located between the two third supports, and a light source of the light supplementing device faces the punching position. A through hole and an arc-shaped through groove are formed in the side wall of the third support, the light supplementing device is connected with the through hole through a rotating piece and connected with the arc-shaped through groove through a sliding piece, one end of the sliding piece is connected with a limiting piece, and the limiting piece is used for limiting sliding of the sliding shaft.
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Description

Technical Field

[0001] The utility model relates to the technical field of laser punching of cigarettes, in particular to a laser punching detection device. Background Art

[0002] According to different ventilation requirements, smoking experience, and the needs of cigarette processing, as well as the fluctuation of physical indicators of medium and thin cigarettes, the process department of cigarette companies formulates different laser punching near-mouth end distances, punching hole diameters, punching numbers, and hole row spacing for online laser punching of tipping paper cigarettes.

[0003] Most of the punching hole diameters are between 0.05mm and 0.2mm. At present, in the production process of domestic cigarette enterprises, the production indicators related to punching, including the number of holes and the hole diameter, are all checked manually or with the help of magnifying glasses and microscopes. In addition, there are solutions that use cameras to collect images at the station after the laser punching station, and then analyze and process to detect whether there are holes, the size of the hole, etc.

[0004] However, during the laser punching process of cigarettes, the lighting at the workstation may be poor, resulting in unclear camera images. Utility Model Content

[0005] In order to solve the problem in the prior art that poor light at the laser drilling station causes unclear camera photography, the utility model provides a laser drilling detection device.

[0006] The technical solution adopted by the utility model is: a laser drilling detection device, a laser drilling device, the laser drilling device comprises a drilling wheel, a beam splitter and a bracket, the bracket is arranged above the drilling wheel, the beam splitter is arranged on the bracket, and is used to drill holes on the target on the drilling wheel, and also includes:

[0007] A second bracket, wherein a first shell is disposed on a side of the second bracket facing the punching position, an image acquisition device is disposed in the first shell, and a lens of the image acquisition device is disposed through a side wall of the shell facing the punching position;

[0008] A third bracket and a fill light device are arranged on the side wall of the housing, the fill light device is located between two of the third brackets, and the light source of the fill light device faces the punching position;

[0009] The side wall of the third bracket is provided with a through hole and an arc-shaped through groove, the fill light device is connected to the through hole through a rotating part, the fill light device is connected to the arc-shaped through groove through a sliding part, one end of the sliding part is connected to a limiting part, and the first limiting part is used to limit the sliding of the first sliding part.

[0010] Preferably, the first sliding member comprises a first sliding shaft and a second sliding shaft, the first sliding shaft is used to slide in one arc-shaped through groove, and the second sliding shaft is used to slide in another arc-shaped through groove;

[0011] One end of the first sliding shaft is connected to one side of the fill light device, and the other end of the first sliding shaft is penetrated by the arc-shaped through groove to connect with the limiting member;

[0012] One end of the second sliding shaft is connected to the other side of the fill light device, and the other end of the second sliding shaft passes through the arc-shaped through groove and is connected to an extension piece.

[0013] Preferably, the fill light device comprises a second shell and a fill light; the outer side wall of the second shell is connected to the rotating part and the sliding part respectively;

[0014] The second shell is hollow inside, and an opening is provided on one side of the second shell facing the punching position, and the fill light is provided inside the second shell.

[0015] Preferably, a slide groove is provided on the inner wall of the second shell, a slider is provided on the side wall of the fill light, and the fill light is slidably connected to the inner wall of the second shell via the slider.

[0016] Preferably, a limit assembly is provided on the top of the second housing, and the limit assembly is connected to the fill light;

[0017] The limiting component includes a second sliding member and a second limiting member; a second through slot is arranged on the top of the second shell, the second through slot is penetrated through the bottom of the second sliding member and connected with the fill light, the second limiting member is arranged on one side of the second through slot, and the second limiting member is used to limit the displacement distance of the second sliding member.

[0018] Preferably, the limiting member includes: a fixed seat, a torsion spring and a baffle; the fixed seat is arranged on one side of the second through groove, one end of the torsion spring is connected to the fixed seat, and the other end of the torsion spring is connected to the baffle, the baffle is located on the displacement trajectory of the sliding member, and the baffle is used to limit the displacement distance of the sliding member.

[0019] Preferably, the second sliding member includes a horizontal portion and a vertical portion, one end of the vertical portion is connected to the horizontal portion, the other end of the vertical portion is connected to the horizontal portion, the length of the horizontal portion is greater than the width of the second through groove, and the baffle is located on the displacement trajectory of the horizontal portion.

[0020] Preferably, a plurality of the second limiting members are provided, and every two second limiting members are relatively arranged on two sides of the second through slot, and the length of the horizontal portion is greater than the width of the gap between two relatively arranged baffles.

[0021] The beneficial effects of the utility model are at least one of the following: by introducing the fill light device, the problem of unclear camera shooting caused by poor light at the laser drilling station is effectively solved. The fill light device provides sufficient and uniform light for the image acquisition device, so that the camera can clearly capture the details of the drilling, thereby improving the quality of image acquisition.

[0022] The fill light device is connected to the third bracket through a rotating member and a sliding member, so that the fill light device can flexibly adjust the angle and position to meet the needs of different punching positions and light conditions. This design increases the flexibility and adaptability of the device and improves its convenience in practical applications.

[0023] As the sliding member slides in the first through groove, the irradiation angle of the fill light changes accordingly, and when the required angle is adjusted, the movement of the sliding member can be limited by the limiting member. The operator can conveniently adjust the angle of the fill light device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the first embodiment of the utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 4 This is a side structural diagram of the second embodiment of the utility model;

[0028] Figure 5 It is a side cross-sectional structural schematic diagram of the second housing of the second embodiment of the utility model;

[0029] Figure 6 This is a schematic diagram of the top view of the second housing of the second embodiment of the utility model;

[0030] Figure 7 This is a schematic diagram of the top view of the limiting member of the second embodiment of the utility model;

[0031] Figure 8 It is a schematic diagram of the side cross-sectional structure of the second shell of the second embodiment of the utility model.

[0032] 1. Laser punching device; 101. Punching wheel; 102. Beam splitter; 103. First bracket 103; 104. Second bracket; 105. First shell; 106. Third bracket; 107. Through hole; 108. Arc-shaped through groove; 109. Rotating member; 110. First sliding member; 111. First limiting member; 112. First sliding shaft; 113. Second sliding shaft; 114. Extension member; 2. Image acquisition device; 3. Fill light device; 301. Second shell; 302. Fill light; 303. Second through groove; 304. Slide groove; 305. Sliding block; 4. Limiting assembly; 41. Second sliding member; 42. Second limiting member; 402. Fixed seat; 403. Torsion spring; 404. Baffle; 405. Horizontal portion; 406. Vertical portion. DETAILED DESCRIPTION

[0033] In order to make the purpose, scheme and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0034] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other embodiments, in order to avoid confusing the present invention, well-known structures, circuits, materials or methods are not specifically described.

[0035] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] In the description of the present invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0037] Embodiment 1: Figure 1 and Figure 2 As shown, a laser drilling detection device includes a laser drilling device 1, wherein the laser drilling device 1 includes a drilling wheel 101, a beam splitter 102 and a first bracket 103, wherein the first bracket 103 is arranged above the drilling wheel 101, and the beam splitter 102 is arranged on the first bracket 103, and is used to drill holes on the target on the drilling wheel 101, and further includes: a second bracket 104, wherein a first shell 105 is arranged on the side of the second bracket 104 facing the drilling position, an image acquisition device 2 is arranged in the first shell 105, and a lens of the image acquisition device 2 is arranged through the side wall of the shell 105 facing the drilling position; a third bracket 106 and a fill light device 3 are relatively arranged on the side wall of the shell 105, and the fill light device 3 is located between the two third brackets 106, and the third bracket 106 can be fixed to the shell 105 by bolting or welding. The light source of the fill light device 3 faces the punching position; the side wall of the third bracket 106 is provided with a through hole 107 and an arc-shaped through groove 108 ; it should be noted that the through hole 107 is located on one side of the arc-shaped through groove 108 .

[0038] like Figure 3 As shown, the fill light device 3 is connected to the through hole 107 via a rotating member 109, and the fill light device 3 is connected to the arcuate through slot 108 via a sliding member 110, wherein the rotating member 109 can make a rotating shaft that matches the size of the through hole 107, and the rotating shaft and the through hole are rotatably connected. It should be noted that the shape of the arcuate through slot 108 is set according to the rotation trajectory of the fill light device 3, such as Figure 3As shown, when the fill light device 3 rotates by the rotating shaft at the rear side, the front end of the fill light device 3 will also have a rotation track. The shape of the arc-shaped through groove 108 is consistent with the rotation track, so the sliding member 110 will not get stuck when sliding in the arc-shaped through groove 108. One end of the sliding member 110 is connected to a first limiting member 111, and the first limiting member 111 is used to limit the sliding of the sliding shaft 110. The first limiting member 111 can be a limiting bolt. When the angle of the fill light device 3 needs to be adjusted, an external force acts on the fill light device 3 or the rotating member 109, so that the rotating member 109 rotates in the through hole 107. The sliding member 110 slides in the arc-shaped through groove 108. When the sliding shaft 110 slides to the desired position, the sliding shaft 110 is fixed to a certain position in the arc-shaped through groove 108 by tightening the limiting bolt.

[0039] In a possible implementation, the sliding member 110 includes a first sliding shaft 112 and a second sliding shaft 113, wherein the first sliding shaft 112 is used to slide in one arc-shaped through slot 108, and the second sliding shaft 113 is used to slide in another arc-shaped through slot 108; one end of the first sliding shaft 112 is connected to one side of the fill light device 3, and the other end of the first sliding shaft 112 passes through the arc-shaped through slot 108 and is connected to a first limiting member 111; one end of the second sliding shaft 113 is connected to the other side of the fill light device 3, and the other end of the second sliding shaft 113 passes through the arc-shaped through slot 108 and is connected to an extension member 114. The first limiting member 111 may be a limiting bolt, and the first sliding shaft 112 is threadedly connected to the limiting bolt. When the first sliding shaft 112 and the second sliding shaft 113 slide to a desired position in the arc-shaped through slot 108, the first sliding shaft 112 may be fixed by tightening the limiting bolt. The extension piece 114 may be an extension rod. When the second sliding shaft 113 needs to be moved, the extension rod 114 may be pinched to move the second sliding shaft.

[0040] In this embodiment, when the laser punching device 1 is working, the punching wheel 101 rotates to transfer the cigarette to be punched to a predetermined position. At the same time, the beam splitter 102 splits the laser beam and guides the laser beam to the target position on the punching wheel 101 to punch the cigarette. In this process, the image acquisition device 2 is started, and its lens is penetrated on the side wall of the first shell 105 and faces the punching position. The image acquisition device 2 captures the image of the punching process in real time to facilitate subsequent quality inspection and analysis. At the same time, the fill light device 3 is started to provide sufficient light for the image acquisition device 2. The fill light device 3 is located between the two third brackets 106, and its light source faces the punching position. The fill light device 3 is connected to the through hole 107 through the rotating member 109, and the angle of the fill light device 3 can be easily adjusted within a certain range to adapt to different punching positions and light conditions.

[0041] Embodiment 2: In order to enable the fill light device to provide more sufficient light for the image acquisition device, such as Figure 4 As shown, the fill light device 3 includes a second shell 301 and a fill light 302; the outer side wall of the second shell 301 is connected to the rotating member 109 and the sliding member 110 respectively;

[0042] like Figure 5 As shown, the second shell 301 is hollow, and the second shell 301 is opened on one side facing the punching position, and the fill light 302 is arranged in the second shell 301. The inner wall of the second shell 301 is provided with a slide groove 304, and a slider 305 is provided on the side wall of the fill light 302, and the fill light 302 is slidably connected to the inner wall of the second shell 301 through the slider. It can be understood that the rear end of the fill light 302 is connected with a power cord, which is a soft cord and has a redundant length, and can be pulled or bent with the movement of the fill light 302. The power cord passes through the rear side wall of the second shell 301 to connect the power supply. The second shell 301 is hollow inside and opened on one side facing the punching position, so that the light emitted by the fill light 302 can directly irradiate the punching position through the opening. The fill light 302 is installed inside the second shell 301 and is slidably connected to the slide groove 304 on the inner wall of the second shell 301 through the slider 305. This design allows the fill light 302 to slide along the slide groove 304 in the second housing 301, thereby adjusting the distance it extends out of the second housing 301. The rear end of the fill light 302 is connected to a power cord, which is a flexible cord with a redundant length design. This design allows the power cord to stretch or bend freely as the fill light 302 moves without being subject to excessive constraints or restrictions. The power cord passes through the rear side wall of the second housing 301 to connect to the power supply, ensuring normal power supply to the fill light 302.

[0043] like Figure 6As shown, a limiting component 4 is provided on the top of the second housing 301, and the limiting component 4 is connected to the fill light 302. The limiting component 4 includes a second sliding member 41 and a second limiting member 42; a second through slot 303 is provided on the top of the second housing 301, the second through slot 303 is penetrated at the bottom of the second sliding member 41 and connected to the fill light 302, the second limiting member 42 is provided on one side of the second through slot 303, and the second limiting member 42 is used to limit the displacement distance of the second sliding member 41. A limiting component 4 is also provided on the top of the second housing 301, and is used to limit the sliding distance of the fill light 302. The limiting component 4 includes a second sliding member 41 and a second limiting member 42. A second through slot 303 is penetrated at the bottom of the second sliding member 41 and connected to the fill light 302, so that the movement of the second sliding member 41 can drive the sliding of the fill light 302. The second stopper 42 is arranged on one side of the second through slot 303. When the second sliding member 41 moves to a certain position, the second stopper 42 will limit its further movement, thereby realizing the control of the displacement distance of the fill light 302. In actual use, the operator can adjust the extension distance of the fill light 302 as needed. When it is necessary to increase the light intensity, the fill light 302 can be slid outward to make it closer to the punching position; when it is necessary to reduce the light intensity, the fill light 302 can be slid inward to make it away from the punching position. By adjusting the extension distance of the fill light 302, the light intensity can be flexibly controlled to meet the lighting needs in different situations.

[0044] like Figure 7 As shown, the second limiting member 42 includes: a fixing seat 402, a torsion spring 403 and a baffle 404; the fixing seat 402 is arranged on one side of the second through slot 303, one end of the torsion spring 403 is connected to the fixing seat 402, and the other end of the torsion spring 403 is connected to the baffle 404. The fixing seat 402 is firmly installed on one side of the second through slot 303, and it provides a fixed support point for the torsion spring 403. One end of the torsion spring 403 is connected to the fixing seat 402, and the other end is connected to the baffle 404. The characteristics of the torsion spring 403 enable it to deform when subjected to external force, and return to its original state after the external force disappears.

[0045] The baffle 404 is located on the displacement track of the second sliding member 41, and is used to limit the displacement distance of the second sliding member 41. The baffle 404 is located on the displacement track of the second sliding member 41, and is used to limit the displacement distance of the second sliding member 41. When the second sliding member 41 moves along the second through slot 303, it will contact the baffle 404.

[0046] There are multiple second limiters 42, and every two second limiters 42 are relatively arranged on both sides of the second through slot 303, and the length of the horizontal portion 405 is greater than the gap width between the two relatively arranged baffles 404. There are multiple second limiters 42, and every two second limiters 42 are relatively arranged on both sides of the second through slot 303. This design not only increases the stability of the structure, but also limits the movement of the second sliding member 41 from both sides to ensure that it does not fall off from the second through slot 303. The length of the horizontal portion 405 is greater than the gap width between the two relatively arranged baffles 404, which means that when the second sliding member 41 moves to a certain position, its horizontal portion 405 will contact the baffles 404 on both sides at the same time, so as to be jointly limited by the second limiters 42 on both sides.

[0047] like Figure 8 As shown, the second sliding member 41 includes a horizontal portion 405 and a vertical portion 406, one end of the vertical portion 406 is connected to the horizontal portion 405, and the other end of the vertical portion 406 is connected to the horizontal portion 405, the length of the horizontal portion 405 is greater than the width of the second through groove 303, and the baffle 404 is located on the displacement trajectory of the horizontal portion 405.

[0048] When the operator pushes the second sliding member 41, it moves along the second through slot 303. During the movement, the second sliding member 41 first encounters the baffle 404 of the first second stopper 42. If the desired position has not been reached at this time, the operator can continue to apply force to make the second sliding member 41 push the baffle 404 to rotate. Due to the action of the torsion spring 403, the baffle 404 will rotate after being subjected to a certain pressure, allowing the second sliding member 41 to pass. In this way, the operator can continue to push the second sliding member 41 to pass through each second stopper 42 in turn until it reaches the desired position. The baffle 404 of each second stopper 42 will play a role in limiting the displacement distance of the second sliding member 41, thereby ensuring that the second sliding member 41 can stably stay at the preset position. This multi-level position adjustment design not only improves the flexibility and applicability of the fill light device, but also makes the operation more convenient and efficient. The operator can adjust the second sliding member 41 to a suitable position through a simple pushing action according to actual needs, thereby achieving precise control of the extension distance of the fill light 302.

[0049] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A laser drilling detection device, comprising a laser drilling device (1), the laser drilling device (1) comprising a drilling wheel (101), a beam splitter (102) and a first bracket (103), the first bracket (103) being arranged above the drilling wheel (101), the beam splitter (102) being arranged on the first bracket (103), and being used for drilling a target on the drilling wheel (101), characterized in that: Also includes: a second bracket (104), wherein a first shell (105) is arranged on a side of the second bracket (104) facing the punching position, an image acquisition device (2) is arranged inside the first shell (105), and a lens of the image acquisition device (2) is arranged through a side wall of the shell (105) facing the punching position; A third bracket (106) and a fill light device (3) are arranged on the side wall of the housing (105) in a manner opposite to each other, the fill light device (3) is located between two of the third brackets (106), and the light source of the fill light device (3) faces the punching position; A through hole (107) and an arc-shaped through groove (108) are provided on the side wall of the third bracket (106); the fill-light device (3) is connected to the through hole (107) via a rotating member (109); the fill-light device (3) is connected to the arc-shaped through groove (108) via a first sliding member (110); one end of the first sliding member (110) is connected to a first limiting member (111); the first limiting member (111) is used to limit the sliding of the first sliding member (110).

2. A laser drilling detection device according to claim 1, characterized in that: The first sliding member (110) comprises a first sliding shaft (112) and a second sliding shaft (113), wherein the first sliding shaft (112) is used to slide in one arc-shaped through groove (108), and the second sliding shaft (113) is used to slide in another arc-shaped through groove (108); One end of the first sliding shaft (112) is connected to one side of the fill light device (3), and the other end of the first sliding shaft (112) passes through the arc-shaped through groove (108) and is connected to a first limiting member (111); One end of the second sliding shaft (113) is connected to the other side of the fill light device (3), and the other end of the second sliding shaft (113) passes through the arc-shaped through slot (108) and is connected to an extension piece (114).

3. The laser drilling detection device according to claim 1, characterized in that: The fill light device (3) comprises a second shell (301) and a fill light (302); the outer side wall of the second shell (301) is respectively connected to the rotating member (109) and the first sliding member (110); The second shell (301) is hollow inside, the second shell (301) is opened on one side facing the punching position, and the fill light (302) is arranged inside the second shell (301).

4. A laser drilling detection device according to claim 3, characterized in that: The inner wall of the second shell (301) is provided with a sliding groove, the side wall of the fill light (302) is provided with a sliding block, and the fill light (302) is slidably connected to the inner wall of the second shell (301) via the sliding block.

5. The laser drilling detection device according to claim 4, characterized in that: A limit assembly (4) is provided on the top of the second shell (301), and the limit assembly (4) is connected to the fill light (302); The limiting component (4) comprises a second sliding member (41) and a second limiting member (42); a second through slot (303) is arranged on the top of the second shell (301); the second through slot (303) is penetrated at the bottom of the second sliding member (41) and connected to the fill light (302); the second limiting member (42) is arranged on one side of the second through slot (303); and the second limiting member (42) is used to limit the displacement distance of the second sliding member (41).

6. The laser drilling detection device according to claim 5, characterized in that: The second limiting member (42) comprises: a fixing seat (402), a torsion spring (403) and a baffle (404); the fixing seat (402) is arranged on one side of the second through slot (303), one end of the torsion spring (403) is connected to the fixing seat (402), and the other end of the torsion spring (403) is connected to the baffle (404); the baffle (404) is located on the displacement track of the second sliding member (41), and the baffle (404) is used to limit the displacement distance of the second sliding member (41).

7. The laser drilling detection device according to claim 6, characterized in that: The second sliding member (41) comprises a horizontal portion (405) and a vertical portion (406), one end of the vertical portion (406) is connected to the horizontal portion (405), and the other end of the vertical portion (406) is connected to the horizontal portion (405), the length of the horizontal portion (405) is greater than the width of the second through groove (303), and the baffle (404) is located on the displacement track of the horizontal portion (405).

8. The laser drilling detection device according to claim 7, characterized in that: A plurality of the second limiting members (42) are provided, and every two second limiting members (42) are arranged oppositely on two sides of the second through slot (303), and the length of the horizontal portion (405) is greater than the width of the gap between two oppositely arranged baffles (404).