Welding cover pipe nozzle detection device

Abstract

The utility model discloses a welding cover nozzle detection device which comprises a pinhole camera for cover nozzle detection, a lens tube is fixedly arranged on the front end face of the pinhole camera for cover nozzle detection, a lens groove is formed in one side of the front end face of the lens tube, a stepping motor fixedly installed in the lens tube is arranged on one side of the lens groove, and the lens tube is connected with the stepping motor. An output shaft of the stepping motor is connected with a motor rotating shaft through a coupler, the front end face of the motor rotating shaft is connected with a threaded rod, one side of the outer surface of the threaded rod is connected with a first pushing block through a threaded structure, and the front end face and the rear end face of the bottom end of the first pushing block are inclined faces. The three end corners of the lower portion of the threaded rod are each provided with a second pushing block. The pinhole camera can shoot the outside through the aspheric transparent resin lens, the large-aperture transparent lens or the anti-reflection coating transparent lens according to the brightness of the external environment, so as to ensure the shooting definition of the pinhole camera in different brightness environments.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, specifically a welding cap nozzle testing device. Background Technology

[0002] Most bagged laundry detergents have plastic caps, which are assembled by welding together an upper cap and a lower cap; therefore, they can also be called welded caps. The welded cap nozzle refers to the part of the lower cap used to cover or seal the pipe opening to prevent leakage or foreign objects from entering the sealed container.

[0003] Because black spots and impurities often appear during the injection molding process of the lower cap, these spots frequently occur at the nozzle. Therefore, to ensure quality, during the conveyor belt transport of the lower caps for welding, a pinhole camera is used to inspect them. If a lower cap has a black spot larger than 0.3mm on its nozzle opening, it is considered unqualified and needs to be rejected. When this lower cap with black spots reaches the rejection mechanism installed on the conveyor belt, the rejection mechanism will remove the unqualified product from the conveyor belt. This ensures the overall production quality of the welded cap nozzles. The pinhole camera, conveyor belt, and rejection mechanism used to inspect the lower caps can be referred to as a welded cap nozzle inspection device.

[0004] However, when using the pinhole camera on this welding cap nozzle inspection device, the brightness of the surrounding environment will affect its shooting effect. If the brightness of the surrounding environment is too high, overexposure may occur, while if the brightness of the surrounding environment is too low, underexposure may occur, resulting in a dark video and loss of detail. Therefore, it does not meet the existing requirements. In response, we have proposed a welding cap nozzle inspection device. Utility Model Content

[0005] The purpose of this invention is to provide a welding cap nozzle inspection device to solve the problems mentioned in the background art, such as the influence of ambient brightness on the shooting effect when using a pinhole camera on this welding cap nozzle inspection device. If the ambient brightness of the pinhole camera is too high, overexposure may occur, while if the ambient brightness of the pinhole camera is too low, underexposure may occur, resulting in a dark video and loss of detail.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a welding cap nozzle detection device, comprising a pinhole camera for cap nozzle detection, a lens tube fixedly provided on the front end face of the pinhole camera for cap nozzle detection, a lens groove provided on one side of the front end face of the lens tube, a stepper motor fixedly installed inside the lens tube on one side of the lens groove, the output shaft of the stepper motor being connected to a motor shaft via a coupling, a threaded rod being connected to the front end face of the motor shaft, a first push block being connected to one side of the outer surface of the threaded rod via a threaded structure, and the front and rear end faces of the bottom end of the first push block being inclined surfaces;

[0007] A second push block is provided at each of the three end corners below the threaded rod. A connecting rod is fixedly provided on the lower end face of the second push block. A lens frame is fixedly provided on the lower end face of the connecting rod. An anti-reflective coated transparent lens is fixedly provided inside the first lens frame from left to right. A large aperture transparent lens is fixedly provided inside the second lens frame from left to right. A large aperture transparent lens is fixedly provided inside the third lens frame from left to right.

[0008] Preferably, a guide rod is provided below the threaded rod, which moves laterally through the first push block, and both ends of the guide rod are fixed to the interior of the lens tube.

[0009] Preferably, a spring is fitted on the outer surface of the connecting rod, and the upper and lower ends of the spring are respectively connected between the lower end face of the second push block and the interior of the lens tube.

[0010] Preferably, the lens slot is provided with a camera head that is fixedly installed on the front end of the pinhole camera for detecting the nozzle, and the camera head is electrically connected to the pinhole camera for detecting the nozzle.

[0011] Preferably, the stepper motor is electrically connected to the pinhole camera for detecting the nozzle of the cover tube, and a plurality of ventilation holes are provided behind the stepper motor on the outer surface of the lens tube.

[0012] Preferably, the distance between the first second push block and the second second push block, and between the second second push block and the third second push block, from left to right, is greater than the length of the top end of the first push block.

[0013] Preferably, an arc-shaped cover plate is provided above the stepper motor on the upper end face of the lens tube, and the lens tube and the arc-shaped cover plate are fixed together by screws.

[0014] This invention utilizes a stepper motor to progressively push the aspherical transparent resin lens, the large-aperture transparent lens, and the anti-reflective coated transparent lens downwards. If the ambient light is too high, the anti-reflective coated transparent lens is used for shooting. This reduces light reflection on the lens surface, improving light transmittance and contrast, and enhancing image quality, thus providing better imaging results in bright environments. If the ambient light is too low, the large-aperture transparent lens is used, allowing more light to enter the camera and improving image brightness and clarity. In normal lighting conditions, the aspherical transparent resin lens is used, reducing aberrations and providing a clearer, more natural image. This technical solution ensures the clarity of the pinhole camera used for nozzle inspection in various lighting environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a front view of the internal structure of this utility model;

[0017] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0018] Figure 4 This utility model Figure 2 Enlarged view of the structure at point B. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Please see Figures 1 to 4 The present invention provides a welding cap nozzle detection device, including a pinhole camera 1 for cap nozzle detection. A lens tube 17 is fixedly provided on the front end face of the pinhole camera 1. A lens groove 2 is provided on one side of the front end face of the lens tube 17. A stepper motor 3 is fixedly installed inside the lens tube 17 on one side of the lens groove 2. The output shaft of the stepper motor 3 is connected to a motor shaft 4 through a coupling. A threaded rod 5 is connected to the front end face of the motor shaft 4. A first push block 6 is connected to one side of the outer surface of the threaded rod 5 through a threaded structure. The front and rear ends of the bottom end of the first push block 6 are both inclined surfaces 7.

[0021] A second push block 9 is provided at each of the three end corners below the threaded rod 5. A connecting rod 10 is fixedly provided on the lower end face of the second push block 9. A lens frame 12 is fixedly provided on the lower end face of the connecting rod 10. An anti-reflective coated transparent lens 13 is fixedly provided inside the first lens frame 12 from left to right. A large aperture transparent lens 14 is fixedly provided inside the second lens frame 12 from left to right. A large aperture transparent lens 14 is fixedly provided inside the third lens frame 12 from left to right.

[0022] Specifically, the stepper motor 3 is electrically connected to the pinhole camera 1 for detecting the nozzle of the cap, and the stepper motor 3 has multiple ventilation holes on the outer surface of the lens tube 17. The electrical connection between the stepper motor 3 and the pinhole camera 1 for detecting the nozzle of the cap enables the pinhole camera 1 for detecting the nozzle of the cap to control the stepper motor 3. When the brightness of the external environment is too high, the pinhole camera 1 for detecting the nozzle of the cap will control the stepper motor 3 to start. The stepper motor 3 can drive the motor shaft 4 connected to it to rotate. When the motor shaft 4 rotates, the threaded rod 5 fixed to it will rotate along with it.

[0023] Please continue reading. Figures 1 to 4 Below the threaded rod 5, there is a guide rod 8 that moves laterally through the first push block 6, and both ends of the guide rod 8 are fixed to the inside of the lens tube 17. Since the first push block 6, which is threaded to the threaded rod 5, is laterally penetrated by the guide rod 8, the first push block 6 cannot rotate on its own. When the threaded rod 5 rotates, the first push block 6, which is threaded to it but cannot rotate on its own, will move back and forth. At this time, the first push block 6 moves forward. As the first push block 6 moves, the inclined surface 7 at the front end of the bottom end of the first push block 6 will contact the second push block 9 located above the aspherical transparent resin lens 15, and under the push of the inclined surface 7, the second push block 9 will move downward.

[0024] Inside the lens slot 2 is a camera head 16 fixedly installed on the front face of the pinhole camera 1 for detecting the nozzle, and the camera head 16 is electrically connected to the pinhole camera 1 for detecting the nozzle. As the second push block 9 descends, the lens frame 12 connected to it via the connecting rod 10 and the aspherical transparent resin lens 15 fixed inside the lens frame 12 will move downward together until the upper end face of the second push block 9 contacts the lower end face of the first push block 6. At this time, the aspherical transparent resin lens 15 will also move to the front of the camera head 16. At this time, the camera head 16 will take pictures of the outside world through the aspherical transparent resin lens 15.

[0025] A spring 11 is fitted on the outer surface of the connecting rod 10. The upper and lower ends of the spring 11 are connected to the lower end face of the second push block 9 and the interior of the lens tube 17, respectively. When the second push block 9 is pushed downward, it will squeeze the spring 11 connected to it. After the aspherical transparent resin lens 15 has been completely moved in front of the shooting head 16, do not turn off the stepper motor 3. Continue to move the first push block 6 forward through the stepper motor 3. As the first push block 6 moves, the contact between the second push block 9 above the aspherical transparent resin lens 15 and the lower end face of the first push block 6 will gradually be released. Then, the second push block 9 will contact the inclined surface 7 at the rear end face of the bottom end of the first push block 6. Through the reaction force of the squeezed spring 11, the second push block 9 and the aspherical transparent resin lens 15 indirectly connected to the second push block 9 can be gradually pushed upward to return to their original position.

[0026] The distance between the first and second push blocks 9 from left to right, and between the second and third push blocks 9, is greater than the length of the top end of the first push block 6. Since the distance between the second push blocks 9 is greater than the length of the top end of the first push block 6, the inclined surface 7 located at the front end of the bottom end of the first push block 6 will only come into contact with another second push block 9 after the second push block 9 has completely released its contact with the first push block 6 and the aspherical transparent resin lens 15 has completely returned to its original position. This technical solution can prevent the lens from overlapping.

[0027] In practical applications, after the first push block 6 releases contact with the first second push block 9 from right to left, it will contact the second second push block 9 from right to left and push it downwards. As the second push block 9 moves downwards, the large-aperture transparent lens 14 indirectly connected to it will also move downwards. When the large-aperture transparent lens 14 is completely in front of the camera head 16, the camera head 16 can take pictures of the outside world through the large-aperture transparent lens 14. As the first push block 6 moves, after the first push block 6 releases contact with the second second push block 9 from right to left, it will contact the third second push block 9 from right to left and push it downwards, along with the anti-reflective coating transparent lens 13 indirectly connected to it. When the anti-reflective coating transparent lens 13 is completely in front of and behind the camera head 16, the camera head 16 can take pictures of the outside world through the anti-reflective coating transparent lens 13.

[0028] Through the above technical solution, the aspherical transparent resin lens 15, the large-aperture transparent lens 14, and the anti-reflective coated transparent lens 13 can be gradually pushed downwards. If the ambient brightness is too high, the anti-reflective coated transparent lens 13 is used for shooting. The anti-reflective coated transparent lens 13 can reduce the reflection of light on the lens surface, improve light transmittance and contrast, and enhance image quality, thus providing better imaging effects in bright environments. If the ambient brightness is too low, the large-aperture transparent lens 14 is used for shooting. The large-aperture transparent lens 14 allows more light to enter the camera, improving the brightness and clarity of the image. If shooting is performed in a normal brightness environment, the aspherical transparent resin lens 15 is used for shooting. The aspherical transparent resin lens 15 can reduce aberrations and provide a clearer and more natural image, thereby ensuring the clarity of the pinhole camera 1 for nozzle detection in various brightness environments.

[0029] An arc-shaped cover plate is provided above the stepper motor 3 on the upper end face of the lens tube 17, and the lens tube 17 is fixed to the arc-shaped cover plate by screws; the arc-shaped cover plate can protect the internal structure of the lens tube 17, and when the internal structure of the lens tube 17 fails, the arc-shaped cover plate can be removed to repair its internal structure.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A welding cap nozzle inspection device, comprising a pinhole camera for cap nozzle inspection, characterized in that: The front end of the pinhole camera for detecting the nozzle is fixedly provided with a lens tube. A lens groove is provided on one side of the front end of the lens tube. A stepper motor is fixedly installed inside the lens tube on one side of the lens groove. The output shaft of the stepper motor is connected to a motor shaft through a coupling. A threaded rod is connected to the front end of the motor shaft. A first push block is connected to one side of the outer surface of the threaded rod through a threaded structure. The front and rear ends of the bottom end of the first push block are both inclined surfaces. A second push block is provided at each of the three end corners below the threaded rod. A connecting rod is fixedly provided on the lower end face of the second push block. A lens frame is fixedly provided on the lower end face of the connecting rod. An anti-reflective coated transparent lens is fixedly provided inside the first lens frame from left to right. A large aperture transparent lens is fixedly provided inside the second lens frame from left to right. A large aperture transparent lens is fixedly provided inside the third lens frame from left to right.

2. The welding cap nozzle detection device according to claim 1, characterized in that: Below the threaded rod is a guide rod that moves laterally through the first push block, and both ends of the guide rod are fixed to the inside of the lens tube.

3. The welding cap nozzle detection device according to claim 1, characterized in that: A spring is fitted on the outer surface of the connecting rod, and the upper and lower ends of the spring are respectively connected to the lower end face of the second push block and the interior of the lens tube.

4. The welding cap nozzle detection device according to claim 1, characterized in that: The lens slot is equipped with a camera head that is fixedly installed on the front end of the pinhole camera for detecting the nozzle, and the camera head is electrically connected to the pinhole camera for detecting the nozzle.

5. The welding cap nozzle detection device according to claim 1, characterized in that: The stepper motor is electrically connected to the pinhole camera for detecting the nozzle of the cover tube, and a plurality of ventilation holes are provided behind the stepper motor on the outer surface of the lens tube.

6. The welding cap nozzle detection device according to claim 1, characterized in that: An arc-shaped cover plate is provided above the stepper motor on the upper end face of the lens tube, and the lens tube and the arc-shaped cover plate are fixed together by screws.

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