A device for detecting the shape of a round bar without blind spots

Abstract

This invention relates to a device for inspecting the shape of a round bar without blind spots. It includes a support mechanism and a detection mechanism, with the detection mechanism connected to the support mechanism. The support mechanism is connected to a rotating mechanism, a driving mechanism, a fixing mechanism, and a feeding mechanism. The detection mechanism is used to inspect the shape of the sample, the fixing mechanism is used to fix the position of the sample, and the feeding mechanism is used to control the sample's entry and exit. The rotating mechanism includes a rotating roller connected to the support mechanism, and the driving mechanism drives the rotating roller to rotate, causing the sample to rotate. This invention eliminates the need for clamps to hold the sample during rotation, allowing the detection mechanism to perform comprehensive inspection of the sample, eliminating blind spots, and thus improving the detection accuracy of the device.

Description

Technical Field

[0001] This application relates to the field of shape inspection, and in particular to a device for inspecting the shape of a round bar without blind spots. Background Technology

[0002] With the development of the tobacco industry, the variety of cigarettes has increased, and the diameters of different types of cigarettes vary. Therefore, the circumference of cigarettes is one of the important testing indicators for the performance of cigarettes and filters. Thus, the shape inspection of cigarettes and filters is a crucial step in producing cigarettes of the same specifications.

[0003] Currently, Chinese invention patent application CN111536879A discloses a combined length and circumference detection device, including a reference surface positioning mechanism, a circumferential reference surface mechanism, and a laser detector. The reference surface positioning mechanism includes a rotating shaft, a positioning reference surface, and a detection channel. The circumferential reference surface mechanism includes a lifting structure, a telescopic structure, and a circumferential reference surface. The horizontally positioned circumferential reference surface is fixedly installed with the telescopic structure, and the telescopic structure is fixedly installed with the lifting structure. The telescopic structure extends laterally, and the lifting structure lifts vertically. The laser detector is installed on the upper part of the detection channel, and the laser surface of the laser detector passes through the sample located in the detection channel. A clamping mechanism for holding and rotating the sample in the detection channel is horizontally positioned between the detection channel and the laser detector.

[0004] Regarding the aforementioned technologies, the inventors believe that the clamping plate holds the sample and causes it to rotate, which prevents the detector from performing corresponding detection on the clamped area, creating a detection blind spot and making it impossible to fully detect the corresponding sample surface. Summary of the Invention

[0005] To facilitate comprehensive inspection of samples using laser detectors and improve inspection accuracy, this application provides a device for inspecting the shape of round bars without blind spots.

[0006] The blind-angle-free cylindrical bar shape inspection device provided in this application adopts the following technical solution:

[0007] A device for detecting the shape of a round bar without blind spots includes a support mechanism and a detection mechanism. The detection mechanism is connected to the support mechanism. The support mechanism is connected to a rotating mechanism, a driving mechanism, a fixing mechanism, and a dropping mechanism. The detection mechanism is used to detect the shape of the sample. The fixing mechanism is used to fix the position of the sample. The dropping mechanism is used to control the entry and exit of the sample.

[0008] The rotating mechanism includes a rotating roller, which is connected to a support mechanism. The driving mechanism drives the rotating roller to rotate, and the rotating roller drives the sample to rotate.

[0009] By adopting the above technical solution, the sample is placed between two rotating rollers, the fixing mechanism fixes the position of the sample, the driving mechanism drives the rotating rollers to rotate, the rotating rollers drive the sample to rotate, and the detection mechanism detects the sample during the rotation process. The sample is not clamped by the clamping plate during the rotation process, so that the detection mechanism can perform a comprehensive detection of the sample, eliminating the detection blind spots, and thus performing a comprehensive detection of the sample surface.

[0010] Optionally, the rotating mechanism further includes a driven roller, which is connected to the support mechanism and in contact with the rotating roller, and is located between the rotating roller and the fixed mechanism.

[0011] By adopting the above technical solution, the rotating roller drives the driven rotating roller to rotate through friction, and the driven rotating roller drives the sample to rotate, thereby improving the synchronization between the sample and the rotating roller and improving the overall versatility of the device.

[0012] Optionally, the support mechanism includes a support frame and a feed pipe. The rotating roller is rotatably connected to the support frame. The drive motor, camera, and light source are all fixedly connected to the support frame. The feed pipe is fixedly connected to the support frame and is located between the rotating rollers. The feed pipe is located on the side of the rotating rollers away from the camera.

[0013] By adopting the above technical solution, the support frame supports the rotating roller, and the sample can be conveniently placed between the rotating roller and the fixing mechanism through the feed pipe.

[0014] Optionally, the fixing mechanism includes a driving component and a fixing component, wherein the driving component is connected to the support frame, and the fixing component is connected to the driving component;

[0015] The fixed component includes a swing roller, the two ends of which are rotatably connected to two drive rollers respectively. The swing roller is connected to the drive component and is located on the side of the rotating rollers away from the camera. The swing roller is located between the rotating rollers.

[0016] By adopting the above technical solution, the sample is fed through the feed pipe between the two rotating rollers and the swing roller. The swing roller contacts the sample and fixes the position of the sample, reducing unnecessary deviation of the sample and thus improving the accuracy of the test. At the same time, the swing roller rotates with the sample, thereby reducing the possibility of sample scratches.

[0017] Optionally, the drive assembly includes a fixed motor, a spring, and two drive rods. The fixed motor is fixedly connected to the support frame, and the output shaft of the fixed motor is fixedly connected to a swing element. A first connecting rod is rotatably connected between the two drive rods and is rotatably connected to the support frame. A second connecting rod is fixedly connected between the two drive rods and is located between the second connecting rod and the swing element. Both ends of the swing roller are rotatably connected to the ends of the two drive rods away from the swing element. One end of the spring is fixedly connected to the support frame via a fixing pin, and the other end of the spring is fixedly connected to the drive rod via a fixing pin. The spring is used to pull the drive rod to move towards the rotating roller side.

[0018] By adopting the above technical solution, when it is necessary to test the sample, the fixed motor is started. The output shaft of the fixed motor drives the swinging component to move. The swinging component pushes the driving rod to move. The driving rod drives the swinging roller to move away from the rotating roller. When the sample falls into the position between the swinging roller and the two rotating rollers, the output shaft of the fixed motor rotates in the opposite direction. The driving rod moves towards the rotating roller under the action of the spring. The swinging roller contacts the sample, thereby fixing the position of the sample.

[0019] Optionally, the fixing assembly further includes a stop bar, which is fixedly connected to the support frame and is located between the swing roller and the rotating roller.

[0020] By adopting the above technical solution, the baffle rod blocks the sample during the movement of the oscillating roller, reducing the possibility of the sample falling out of the gap between the oscillating roller and the rotating roller.

[0021] Optionally, the fixing component further includes a first limiting pin and a second limiting pin. The first limiting pin is fixedly connected to the support frame and is located on the side of the driving rod away from the rotating roller. The second limiting pin is fixedly connected to the support frame and is located on the side of the swing member close to the rotating roller.

[0022] By adopting the above technical solution, the first limiting pin limits the swing amplitude of the driving rod, and the second limiting pin limits the swing amplitude of the swinging component, thereby reducing the possibility of the sample falling due to excessive gap between the swinging roller and the rotating roller.

[0023] Optionally, the feeding mechanism includes a driver and a baffle plate. The driver is fixedly connected to the support frame, and the output shaft of the driver is fixedly connected to the baffle plate. The baffle plate is used to support the sample.

[0024] The driving mechanism includes a drive motor, the output shaft of which is fitted with a first transmission belt, which is fitted on a rotating roller, and a second transmission belt is fitted on the rotating roller, which is fitted on another rotating roller.

[0025] By adopting the above technical solution, the drive motor is started, and the drive motor drives two rotating rollers to rotate via the first and second transmission belts. The rotating rollers drive the driven rollers to rotate, and the driven rollers drive the sample to rotate through friction. The detection mechanism then detects the sample. After the detection mechanism has completed the sample detection, the output shaft of the driver retracts, and the baffle plate retracts, thereby allowing the sample to disengage from the rotating rollers and the swing rollers, facilitating subsequent sample detection.

[0026] Optionally, the detection mechanism includes a camera and a light source, both of which are fixedly connected to a support frame. The camera is electrically connected to a driver and a drive motor. The camera is located between two rotating rollers, on one side of the two rotating rollers, and the light source is located on the side of the two rotating rollers closer to the camera.

[0027] By adopting the above technical solution, the light source illuminates the sample, making it easier for the camera to take pictures of the sample.

[0028] Optionally, the drive mechanism further includes an encoder, the output shaft of which is in contact with the first drive belt, and the encoder is electrically connected to the camera.

[0029] By adopting the above technical solution, the drive motor is started, which drives the two rotating rollers to rotate. The rotating rollers drive the sample to rotate, thereby enabling the detection mechanism to detect the sample. The camera continuously images according to the pulse signal of the encoder, thereby improving the detection accuracy of the camera.

[0030] In summary, the present invention has at least one of the following beneficial technical effects:

[0031] 1. This application uses rotating rollers to place the sample between the rotating rollers. A fixing mechanism fixes the position of the sample, and a driving mechanism drives the rotating rollers to rotate. The rotating rollers drive the sample to rotate. During the rotation of the sample, the detection mechanism detects the sample. The sample does not need to be held by clamps during the rotation, so the detection mechanism can perform comprehensive detection of the sample, eliminating blind spots and improving the detection accuracy of the device.

[0032] 2. This application incorporates a swing roller. When a sample needs to be tested, a fixed motor is activated. The output shaft of the fixed motor drives the swing component to move, which in turn pushes the drive rod to move. The drive rod then moves the swing roller away from the rotating roller. When the sample falls into the position between the swing roller and the two rotating rollers, the output shaft of the fixed motor rotates in the opposite direction. Under the action of the spring, the drive rod moves towards the rotating roller, causing the swing roller to contact the sample and thus fix the sample's position. This also facilitates the fixing of round bars of different diameters, thereby facilitating the testing of round bars of different specifications.

[0033] 3. This application incorporates a baffle bar, which blocks the sample during the movement of the oscillating roller, reducing the possibility of the sample falling through the gap between the oscillating roller and the rotating roller;

[0034] 4. This application improves the synchronization between the sample and the rotating roller by setting a driven roller, which drives the rotating roller to rotate through friction, thereby improving the overall versatility of the device. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a round bar shape detection device without blind spots according to Embodiment 1 of the present invention.

[0036] Figure 2 This is a schematic diagram of the fixing mechanism in a round bar shape detection device with no blind spots according to Embodiment 1 of the present invention.

[0037] Figure 3 This is a bottom view of a round bar shape detection device with no blind spots according to Embodiment 1 of the present invention.

[0038] Figure 4 This is a schematic diagram of the structure of the baffle plate and the lower panel in a round bar shape detection device without blind spots according to Embodiment 1 of the present invention.

[0039] Figure 5 This is a schematic diagram of the structure of a round bar shape detection device without blind spots according to Embodiment 2 of the present invention.

[0040] Figure 6 This is a schematic diagram of the structure of a round bar shape detection device without blind spots according to Embodiment 3 of the present invention.

[0041] Explanation of reference numerals in the attached drawings: 1. Support mechanism; 11. Support frame; 111. Upper panel; 112. Lower panel; 113. Unit panel; 114. Placement slot; 12. Feed pipe; 2. Rotating mechanism; 21. Rotating roller; 22. Driven roller; 3. Drive mechanism; 31. Drive motor; 32. First transmission belt; 33. Second transmission belt; 34. Encoder; 4. Fixing mechanism; 41. Drive assembly; 411. Fixing motor; 412. Swinging component; 413. Drive rod; 414. First connecting rod; 415. Second connecting rod; 416. Spring; 417. Fixing pin; 418. First limit pin; 419. Second limit pin; 42. Fixing assembly; 421. Swinging roller; 422. Stop bar; 5. Discharge mechanism; 51. Driver; 52. Stop plate; 6. Detection mechanism; 61. Camera; 611. Camera body; 612. Lens; 62. Light source. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0043] This invention provides a first embodiment of a device for detecting the shape of a round bar without blind spots. (Refer to...) Figure 1 and Figure 2 The blind-spot-free round bar shape inspection device includes a support mechanism 1 and an inspection mechanism 6. The inspection mechanism 6 is connected to the support mechanism 1, which is connected to a rotating mechanism 2, a fixing mechanism 4, and a feeding mechanism 5. The inspection mechanism 6 is used to inspect the shape of the sample, the fixing mechanism 4 is used to fix the position of the sample, and the feeding mechanism 5 is used to control the entry and exit of the sample. The rotating mechanism 2 drives the sample to rotate. During the rotation of the sample, the inspection mechanism 6 inspects the surface of the sample. The rotation of the sample eliminates the need for clamping plates to hold the sample, removing blind spots and allowing the inspection mechanism 6 to perform comprehensive inspection of the sample.

[0044] Reference Figure 1 The support mechanism 1 includes a support frame 11 and a feed pipe 12. The support frame 11 includes an upper panel 111 and a lower panel 112. The upper panel 111 and the lower panel 112 are fixedly connected together by a unit panel 113. The feed pipe 12 is fixedly connected to the upper panel 111 and passes through the upper panel 111.

[0045] Reference Figure 1 The rotating mechanism 2 includes two rotating rollers 21. The two ends of the two rotating rollers 21 are rotatably connected to the upper panel 111 and the lower panel 112, respectively. The driving mechanism 3 drives the two rotating rollers 21 to rotate, and the rotating rollers 21 drive the sample to rotate.

[0046] Reference Figure 2 and Figure 3 The drive mechanism 3 includes a drive motor 31. The output shaft of the drive motor 31 is fitted with a first transmission belt 32. The first transmission belt 32 is fitted on a rotating roller 21. A second transmission belt 33 is fitted on a rotating roller 21. The second transmission belt 33 is fitted on another rotating roller 21. The second transmission belt 33 is located on the side of the rotating roller 21 away from the first transmission belt 32.

[0047] Reference Figure 2 and Figure 3 The drive motor 31 is started, and the output shaft of the drive motor 31 drives the first transmission belt 32 to rotate. The first transmission belt 32 drives a rotating roller 21 to rotate, and the rotating roller 21 drives another rotating roller 21 to rotate via the second transmission belt 33. The two rotating rollers 21 drive the sample to rotate, thereby facilitating the detection mechanism 6 to perform comprehensive detection on the sample.

[0048] Reference Figure 2 The fixing mechanism 4 includes a drive component 41 and a fixing component 42. The drive component 41 is connected to the upper panel 111, and the fixing component 42 is connected to the drive component 41.

[0049] Reference Figure 1 and Figure 2 The fixing component 42 includes a swing roller 421, which is connected to the drive component 41. The swing roller 421 is located on the side of the two rotating rollers 21 away from the detection mechanism 6, and is positioned between the two rotating rollers 21. The sample is fed through the feed pipe 12 between the two rotating rollers 21 and the swing roller 421. The swing roller 421 abuts against the sample and fixes the position of the sample, reducing unnecessary sample displacement and thus improving the accuracy of the detection.

[0050] Reference Figure 2 The drive assembly 41 includes a fixed motor 411, two drive rods 413, and a spring 416. The fixed motor 411 is fixedly connected to the top plate 111, and the output shaft of the fixed motor 411 is fixedly connected to a swing member 412. A first connecting rod 414 is rotatably connected between the two drive rods 413, passing through the top plate 111 and the bottom plate 112, and is rotatably connected to both the top plate 111 and the bottom plate 112. A second connecting rod 415 is fixedly connected between the two drive rods 413. Multiple movable holes are provided on both the top plate 111 and the bottom plate 112, and the second connecting rod 415 passes through these movable holes, allowing it to move within them. The first connecting rod 414 is located between the second connecting rod 415 and the swing member 412. The two ends of the swing roller 421 are rotatably connected to the ends of the two driving rods 413 away from the swing member 412. One end of the spring 416 is fixedly connected to the top plate 111 by a fixing pin 417, and the other end of the spring 416 is fixedly connected to the driving rod 413 by a fixing pin 417. The spring 416 is used to pull the driving rod 413 to move toward the rotating roller 21.

[0051] Reference Figure 2 When a sample needs to be tested, the fixed motor 411 is started. The output shaft of the fixed motor 411 drives the swing component 412 to move. The swing component 412 pushes the driving rod 413 to move. The driving rod 413 drives the swing roller 421 to move away from the rotating roller 21. When the sample falls into the position between the swing roller 421 and the two rotating rollers 21, the output shaft of the fixed motor 411 rotates in the opposite direction. The driving rod 413 moves towards the rotating roller 21 under the action of the spring 416, so that the swing roller 421 abuts against the sample, thereby fixing the position of the sample.

[0052] Reference Figure 2 The fixing assembly 42 also includes a baffle rod 422, whose two ends are fixedly connected to the upper panel 111 and the lower panel 112, respectively. The baffle rod 422 is located between the swing roller 421 and the rotating rod. During the movement of the swing roller 421, the baffle rod 422 blocks the sample, reducing the possibility of the sample falling through the gap between the swing roller 421 and the rotating roller 21.

[0053] Reference Figure 1 and Figure 2 The fixing assembly 42 also includes a first limiting pin 418 and a second limiting pin 419. The first limiting pin 418 is fixedly connected to the top plate 111 and is located on the side of the driving rod 413 away from the rotating roller 21. The first limiting pin 418 limits the swing amplitude of the driving rod 413, thereby reducing the possibility of the sample falling due to excessive gap between the swing roller 421 and the rotating roller 21. The second limiting pin 419 is fixedly connected to the top plate 111 and is located on the side of the swing member 412 closer to the rotating roller 21. The second limiting pin 419 limits the swing amplitude of the swing member 412, thereby reducing the possibility of the sample falling due to excessive gap between the swing roller 421 and the rotating roller 21.

[0054] Reference Figure 3 and Figure 4 The feeding mechanism 5 includes a driver 51 and a baffle plate 52. The output shaft of the driver 51 is fixedly connected to the baffle plate 52. A placement groove 114 is provided on the lower panel 112, and the baffle plate 52 is placed in the placement groove 114. A through hole is provided on the bottom wall of the placement groove 114. The baffle plate 52 is used to support the sample. After the detection mechanism 6 completes the detection of the sample, the output shaft of the driver 51 retracts, and the baffle plate 52 retracts, so that the sample is released from the rotating roller 21 and the swing roller 421 and falls from the through hole on the placement groove 114, which facilitates the subsequent detection of the sample.

[0055] Reference Figure 2 The detection mechanism 6 includes a camera 61 and a light source 62. The camera 61 is located between two rotating rollers 21, on one side of the two rotating rollers 21, and is electrically connected to a drive motor 31. The light source 62 is located on the side of the two rotating rollers 21 closer to the camera 61. The camera 61 includes a camera body 611 and a lens 612. The light source 62 illuminates the sample, allowing the camera 61 to take a picture of the sample.

[0056] Working principle: When the fixed motor 411 is started, its output shaft drives the oscillating component 412 to move. The oscillating component 412 pushes the driving rod 413 to move, which in turn drives the oscillating roller 421 to move away from the rotating roller 21. The sample is fed through the feed pipe 12 onto the baffle plate 52 between the oscillating roller 421 and the two rotating rollers 21. The output shaft of the fixed motor 411 rotates in the opposite direction, and the driving rod 413 moves towards the rotating roller 21 under the action of the spring 416. The oscillating roller 421 then contacts the sample, thus fixing its position.

[0057] Start the drive motor 31, which drives the two rotating rollers 21 to rotate. The rotating rollers 21 drive the sample to rotate, and the camera 61 detects the sample.

[0058] After the camera 61 finishes testing the sample, the output shaft of the driver 51 retracts and the baffle plate 52 retracts, thereby allowing the sample to be separated from the rotating roller 21 and the swing roller 421, which facilitates the subsequent testing of the sample.

[0059] The present invention provides a second embodiment of a round bar shape detection device with no blind spots. The difference between embodiment two and embodiment one is that: (Refer to...) Figure 5 The drive mechanism 3 also includes an encoder 34. The two driven rollers 22 are rotatably connected to the upper panel 111 and the lower panel 112 respectively. The two driven rollers 22 are in contact with the two rotating rollers 21 respectively. The two driven rollers 22 are located between the two rotating rollers 21 and the swing roller 421.

[0060] Working principle: The rotating roller 21 drives the driven roller 22 to rotate, and the driven roller 22 drives the sample to rotate, thereby improving the synchronization between the sample and the rotating roller 21 and improving the overall versatility of the device.

[0061] The present invention provides a third embodiment of a round bar shape detection device with no blind spots. The difference between embodiment three and embodiment two is that: referring to... Figure 6 The drive mechanism 3 also includes an encoder 34. The output shaft of the encoder 34 is in contact with the first transmission belt 32. The encoder 34 is located between the rotating roller 21 and the drive motor 31. The encoder 34 is electrically connected to the camera 61.

[0062] Working principle: The drive motor 31 drives the encoder 34 to rotate through the first transmission belt 32. During the rotation of the encoder 34, a pulse signal is triggered to the camera 61. The camera 61 continuously images according to the pulse signal of the encoder 34, thereby improving the detection accuracy.

[0063] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for detecting the shape of a round bar without blind spots, characterized in that: It includes a support mechanism (1) and a detection mechanism (6). The detection mechanism (6) is connected to the support mechanism (1). The support mechanism (1) is connected to a rotating mechanism (2), a driving mechanism (3), a fixing mechanism (4), and a dropping mechanism (5). The detection mechanism (6) is used to detect the shape of the sample. The fixing mechanism (4) is used to fix the position of the sample. The dropping mechanism (5) is used to control the entry and exit of the sample. The rotating mechanism (2) includes a rotating roller (21), which is connected to the support mechanism (1). The driving mechanism (3) drives the rotating roller (21) to rotate, and the rotating roller (21) drives the sample to rotate. The feeding mechanism (5) includes a driver (51) and a baffle plate (52). The driver (51) is fixedly connected to the support frame (11). The output shaft of the driver (51) is connected to the baffle plate (52). The baffle plate (52) is used to support the sample. The rotating mechanism (2) also includes a driven roller (22). The driven roller (22) is connected to the support mechanism (1). The driven roller (22) is in contact with the rotating roller (21). The driven roller (22) is located between the rotating roller (21) and the fixed mechanism (4).

2. The blind-angle-free round bar shape detection device according to claim 1, characterized in that: The support mechanism (1) includes a support frame (11) and a feed pipe (12). The rotating roller (21) is rotatably connected to the support frame (11). The drive motor (31), camera (61) and light source (62) are all fixedly connected to the support frame (11). The feed pipe (12) is fixedly connected to the support frame (11). The feed pipe (12) is located between the rotating rollers (21). The feed pipe (12) is located on the side of the rotating rollers (21) away from the camera (61).

3. The blind-angle-free round bar shape detection device according to claim 2, characterized in that: The fixing mechanism (4) includes a drive component (41) and a fixing component (42). The drive component (41) is connected to the support frame (11), and the fixing component (42) is connected to the drive component (41). The fixed component (42) includes a swing roller (421), the two ends of which are rotatably connected to two drive rods (413) respectively. The swing roller (421) is connected to the drive component (41). The swing roller (421) is located on the side of the rotating roller (21) away from the camera (61). The swing roller (421) is located between the rotating rollers (21).

4. The blind-angle-free round bar shape detection device according to claim 3, characterized in that: The drive assembly (41) includes a fixed motor (411), a spring (416), and two drive rods (413). The fixed motor (411) is fixedly connected to the support frame (11). The output shaft of the fixed motor (411) is fixedly connected to a swing member (412). A first connecting rod (414) is rotatably connected between the two drive rods (413). The first connecting rod (414) is rotatably connected to the support frame (11). A second connecting rod (415) is fixedly connected between the two drive rods (413). The connecting rod (414) is located between the second connecting rod (415) and the swing member (412). The two ends of the swing roller (421) are rotatably connected to the ends of the two driving rods (413) away from the swing member (412). One end of the spring (416) is fixedly connected to the support frame (11) through the fixing pin (417). The other end of the spring (416) is fixedly connected to the driving rod (413) through the fixing pin (417). The spring (416) is used to pull the driving rod (413) to move toward the rotating roller (21).

5. The blind-angle-free round bar shape detection device according to claim 4, characterized in that: The fixing component (42) also includes a baffle rod (422), which is fixedly connected to the support frame (11) and is located between the swing roller (421) and the rotating roller (21).

6. The blind-angle-free round bar shape detection device according to claim 4, characterized in that: The fixing component (42) further includes a first limiting pin (418) and a second limiting pin (419). The first limiting pin (418) is fixedly connected to the support frame (11) and is located on the side of the driving rod (413) away from the rotating roller (21). The second limiting pin (419) is fixedly connected to the support frame (11) and is located on the side of the swing member (412) close to the rotating roller (21).

7. The blind-angle-free round bar shape detection device according to claim 6, characterized in that: The drive mechanism (3) includes a drive motor (31), the output shaft of the drive motor (31) is fitted with a first transmission belt (32), the first transmission belt (32) is fitted on a rotating roller (21), a second transmission belt (33) is fitted on the rotating roller (21), and the second transmission belt (33) is fitted on another rotating roller (21).

8. The blind-angle-free round bar shape detection device according to claim 7, characterized in that: The detection mechanism (6) includes a camera (61) and a light source (62). The camera (61) is electrically connected to a drive motor (31). The camera (61) is located between two rotating rollers (21) and on one side of the two rotating rollers (21). The light source (62) is located on the side of the two rotating rollers (21) closer to the camera (61).

9. The blind-angle-free round bar shape detection device according to claim 7, characterized in that: The drive mechanism (3) also includes an encoder (34), the output shaft of which is connected to the first transmission belt (32), and the encoder (34) is electrically connected to the camera (61).

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