Defect detection mechanism

Abstract

The invention provides a defect detection mechanism, and relates to the technical field of tobacco production. The defect detection mechanism comprises a supporting assembly, a measuring assembly and an elastic reset assembly. Two supporting plates in the supporting assembly are oppositely arranged in a spaced mode in the left-right direction. The measuring assembly comprises a mounting shaft, an optical fiber transmitter, an optical fiber receiver and a plurality of measuring pieces, the two ends of the mounting shaft are fixedly arranged on the two supporting plates respectively, each measuring piece is provided with a connecting hole matched with the mounting shaft, and the first end of each measuring piece is matched with the two supporting plates to form a measuring channel allowing cigarette packets to pass through; the second section of each measuring piece extends upwards and is provided with a measuring hole, the optical fiber transmitter is arranged in the measuring hole in the leftmost measuring piece, and the optical fiber receiver is arranged in the measuring hole in the rightmost measuring piece; the elastic reset assembly is arranged between the supporting assembly and each measuring piece. According to the defect detection mechanism, the detection applicability is improved while the detection effect is ensured, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco production, and in particular to a defect detection mechanism. Background Art

[0002] During the cigarette production process, cigarette packs must be inspected for visual defects to ensure quality. These defects can range from damaged packs, wrinkled cellophane wrappers, and stained wrappers to dozens of other types. These defects are primarily detected and controlled using in-line visual inspection devices installed on packaging equipment.

[0003] However, in actual applications, visual inspection devices still face many challenges and limitations. On the one hand, cigarette manufacturers use a wide variety of packaging equipment with different models, and the detection principles and image processing algorithms of the corresponding visual inspection equipment are also different. This leads to uneven detection capabilities of different equipment, making it difficult to achieve unified quality control standards. On the other hand, visual inspection technology has strict requirements on equipment installation conditions and requires reliance on special devices for auxiliary installation. Different models also have different requirements for installation locations, which not only increases the difficulty and cost of equipment installation and commissioning, but also limits its application in complex production environments. In addition, visual inspection equipment has poor adaptability to the application environment. Working conditions such as changes in lighting and dust pollution in the workshop will significantly affect the detection effect, further restricting its widespread application in the industry. Summary of the Invention

[0004] The object of the present invention is to provide a defect detection mechanism that ensures detection effect while improving detection applicability and reducing costs.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A defect detection mechanism is used to detect surface defects on cigarette packs, and the defect detection mechanism includes:

[0007] The support assembly includes two support plates, which are spaced apart from each other in the left-right direction;

[0008] A measuring assembly comprising a mounting shaft, a fiber optic transmitter, a fiber optic receiver, and a plurality of measuring members, wherein the two ends of the mounting shaft are fixedly mounted on the two support plates, respectively, and each of the measuring members is provided with a connecting hole. The plurality of measuring members are rotatably connected to the mounting shaft through the corresponding connecting holes, so that the first end of each measuring member cooperates with the two support plates to form a measuring channel allowing the cigarette pack to pass through, wherein each measuring member has a working state and an initial state, and the height of the first end of each measuring member in the working state is higher than the height of the first end of each measuring member in the initial state; the second section of each measuring member extends upward and is provided with a measuring hole, the fiber optic transmitter is provided in the measuring hole on the leftmost measuring member, and the fiber optic receiver is provided in the measuring hole on the rightmost measuring member;

[0009] The elastic reset component is arranged between the supporting component and each of the measuring members.

[0010] As a further technical solution, the measuring assembly further includes a plurality of measuring probes, and the plurality of measuring probes are disposed at the first ends of the plurality of measuring members in a one-to-one correspondence.

[0011] As a further technical solution, the first end of the measuring member is provided with an adjusting screw hole, and the measuring probe is screwed to the corresponding adjusting screw hole through an adjusting screw.

[0012] As a further technical solution, the measuring piece includes a measuring section and a guide section, the guide section is fixedly connected to the lower end of the measuring section and extends in the front-to-back direction, the measuring probe is arranged on the side of the guide section away from the measuring section, the upper end of the measuring section extends upward, the measuring hole is arranged in the measuring section, and the connecting hole is arranged at the connection between the guide section and the measuring section.

[0013] As a further technical solution, a plurality of the measuring holes are spaced apart on the measuring section along the up and down directions.

[0014] As a further technical solution, the elastic reset assembly includes a reset rod and multiple tension springs. The reset rod is connected to the support assembly corresponding to the middle parts of the multiple measuring pieces and is located in front of the multiple measuring pieces. The two ends of the multiple tension springs are connected one by one between the middle parts of the multiple measuring pieces and the reset rod.

[0015] As a further technical solution, the defect detection mechanism also includes a limit assembly, which includes a limit rod. The limit rod is connected to the support assembly corresponding to the elastic reset assembly and is located between the reset rod and the multiple measuring parts.

[0016] As a further technical solution, the limiting assembly further includes a buffer member, which is arranged on a side of the limiting rod close to the plurality of measuring members.

[0017] As a further technical solution, the support assembly further includes two support base plates, and the two support plates are liftably arranged on the two support base plates in a one-to-one correspondence.

[0018] As a further technical solution, the measuring components are provided in two groups, and the two groups of measuring components are arranged relatively spaced apart in the up and down directions. The two groups of measuring components cooperate with the two support plates to form the measuring channels, and the elastic reset components are provided in two groups in a one-to-one correspondence with the measuring components.

[0019] Compared with the existing technology, the defect detection mechanism provided by the present invention has the following technical advantages:

[0020] Because multiple measuring members are rotatably connected to the mounting shaft through corresponding connection holes, the first ends of the multiple measuring members cooperate with the two support plates to form a measurement channel that allows cigarette packs to pass through. Simultaneously, the second sections of the multiple measuring members extend upward and are further provided with measurement holes. The fiber optic transmitter is provided in the measurement hole on the leftmost measuring member, and the fiber optic receiver is provided in the measurement hole on the rightmost measuring member. An elastic reset assembly is provided between the support assembly and the measuring members. Therefore, when defect measurement of cigarette packs is required, the multiple cigarette packs are sequentially passed through the measurement channel from back to front. As the cigarette packs pass through the measurement channel, the first ends of the multiple measuring members contact the upper surface of the cigarette packs. Under the action of the lever principle, the upper ends of the multiple measuring members rotate backward around the mounting shaft, while the lower ends of the multiple measuring members rotate forward around the mounting shaft. After the current cigarette pack passes through the inspection channel, the multiple measuring members return to their original state under the action of the elastic reset assembly, facilitating surface defect detection for the next cigarette pack. During this process, if the cigarette pack is defect-free, the multiple measuring members rotate synchronously. Light emitted by the fiber optic transmitter on the leftmost measuring member sequentially passes through the measuring holes on the middle measuring members and is received by the fiber optic receiver on the rightmost measuring member. In this case, the fiber optic receiver does not issue a fault signal. However, if the cigarette pack has a surface defect, the different heights of the first ends of the multiple measuring members contacting the pack surface cause a change in the rotation angle of one or more measuring members corresponding to the surface defect. This prevents the light emitted by the fiber optic transmitter on the leftmost measuring member from passing through the measuring hole on the corresponding pack surface defect. Consequently, the fiber optic receiver on the rightmost measuring member cannot receive the light emitted by the fiber optic transmitter, causing the fiber optic receiver to issue a fault signal, indicating a surface defect on the current pack. During this process, during defect detection, as the cigarette pack passes through the inspection channel, the multiple measuring members cooperate with the mounting shaft. Using the fiber optic transmitter and receiver, and leveraging the principle of leverage, any type of surface defect can be detected, ensuring uniform surface defect measurement and effective defect detection. Secondly, by adjusting the distance between the two support plates in the defect detection mechanism and rotating the number of measuring pieces set on the mounting shaft, the defect detection mechanism can be coordinated with tobacco packaging machines of any specifications to realize the defect detection process on the surface of the cigarette pack, thereby improving the applicability of the defect detection mechanism and reducing the installation and debugging costs of the defect detection mechanism. Finally, during the defect detection process, the rotation of the multiple measuring pieces around the mounting shaft is only associated with the surface condition of the cigarette pack being inspected. That is, during the inspection process, the inspection results are only associated with the surface condition of the cigarette pack being inspected, and the inspection results are not affected by changes in lighting, dust pollution, and other conditions in the workshop. While ensuring the accuracy of the inspection results, the defect detection mechanism is applicable to workshops of any working conditions, thereby further improving its applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0022] Figure 1 This is a schematic structural diagram of the defect detection mechanism provided by the present invention from a first perspective;

[0023] Figure 2 This is a schematic structural diagram of the defect detection mechanism provided by the present invention from a second viewing angle;

[0024] Figure 3 This is a schematic structural diagram of the defect detection mechanism provided by the present invention from a third perspective;

[0025] Figure 4 It is a structural schematic diagram of the measuring piece in the defect detection mechanism provided by the present invention.

[0026] In the picture:

[0027] 10. Cigarette pack;

[0028] 100, support assembly; 110, support plate; 120, support base plate; 121, adjustment hole;

[0029] 200, measuring assembly; 210, mounting shaft; 220, fiber optic transmitter; 230, fiber optic receiver; 240, measuring piece; 241, connecting hole; 242, measuring hole; 243, adjusting screw hole; 250, adjusting screw;

[0030] 300, elastic reset assembly; 310, reset rod; 320, tension spring;

[0031] 400, limit assembly; 410, limit rod; 420, buffer. DETAILED DESCRIPTION

[0032] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0033] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0034] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0035] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0036] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values that do not use relative terms should also be disclosed as specific values with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0037] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0038] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0039] Combine Figures 1 to 4 As shown, the defect detection mechanism of this embodiment cooperates with the cigarette pack 10 packaging machine to perform surface defect detection on the cigarette pack 10. The defect detection mechanism ensures the detection effect while improving the detection applicability and reducing the cost. Specifically, the defect detection mechanism includes a support component 100, a measuring component 200 and an elastic reset component 300: the support component 100 includes two support plates 110, and the two support plates 110 are relatively spaced apart along the left and right directions; the measuring component 200 includes a mounting shaft 210, an optical fiber transmitter 220, an optical fiber receiver 230 and a plurality of measuring parts 240, the two ends of the mounting shaft 210 are respectively fixedly provided on the two support plates 110, and each measuring part 240 is provided with a connecting hole 241. The plurality of measuring parts 240 are rotatably connected to the mounting shaft 210 through the corresponding connecting holes 241, so that the first The ends cooperate with the two support plates 110 to form a measuring channel allowing the cigarette pack 10 to pass through, wherein each measuring piece 240 has a working state and an initial state, and the height of the first end of each measuring piece 240 in the working state is higher than the height of the first end of each measuring piece 240 in the initial state; the second section of each measuring piece 240 extends upward and is provided with a measuring hole 242, the optical fiber transmitter 220 is provided in the measuring hole 242 on the leftmost measuring piece 240, and the optical fiber receiver 230 is provided in the measuring hole 242 on the rightmost measuring piece 240; the elastic reset assembly 300 is provided between the support assembly 100 and each measuring piece 240.

[0040] Since multiple measuring parts 240 are rotatably connected to the mounting shaft 210 through corresponding connecting holes 241, the first ends of the multiple measuring parts 240 cooperate with the two support plates 110 and the workbench (not shown in the figure) below the defect detection mechanism to form a measuring channel that allows the cigarette pack 10 to pass through; at the same time, the second sections of the multiple measuring parts 240 extend upward and are all provided with measuring holes 242, the optical fiber transmitter 220 is provided in the measuring hole 242 on the leftmost measuring part 240, and the optical fiber receiver 230 is provided in the measuring hole 242 on the rightmost measuring part 240; the elastic reset assembly 300 is provided between the support assembly 100 and each measuring part 240. Therefore, when it is necessary to measure defects of the cigarette pack 10, multiple cigarette packs 10 are passed through the measurement channel in sequence from back to front; when the cigarette pack 10 passes through the measurement channel, the first ends of the multiple measuring pieces 240 are in contact with the upper surface of the cigarette pack 10, and under the action of the lever principle, the upper ends of the multiple measuring pieces 240 are rotated backward around the mounting shaft 210, and the lower ends of the multiple measuring pieces 240 are rotated forward around the mounting shaft 210. After the current cigarette pack 10 passes through the detection channel, the multiple measuring pieces 240 are restored to their original state under the action of the elastic reset assembly 300, so as to facilitate surface defect detection of the next cigarette pack 10. During this process, if the cigarette package 10 has no defects, the multiple measuring members 240 rotate synchronously, and the light emitted by the fiber optic transmitter 220 provided on the leftmost measuring member 240 passes through the measuring holes 242 on the middle measuring members 240 in sequence and is received by the fiber optic receiver 230 provided on the rightmost measuring member 240. In this case, the fiber optic receiver 230 does not issue a fault signal. If there is a defect on the surface of the cigarette package 10, due to the different heights of the first ends of the multiple measuring members 240 at different locations on the surface of the cigarette package 10 when they contact the surface of the cigarette package 10, the rotation angle of one or more of the measuring members 240 corresponding to the surface defect of the cigarette package 10 changes, so that the light emitted by the fiber optic transmitter 220 provided on the leftmost measuring member 240 cannot pass through the measuring holes 242 on the measuring member 240 corresponding to the surface defect of the cigarette package 10. As a result, the fiber optic receiver 230 provided on the rightmost measuring member 240 cannot receive the light emitted by the fiber optic transmitter 220, and the fiber optic receiver 230 issues a fault signal, indicating that there is a defect on the surface of the current cigarette package 10. In this process, first, during the defect detection process, when the cigarette pack 10 passes through the detection channel, multiple measuring parts 240 cooperate with the mounting shaft 210, with the help of the optical fiber transmitter 220 and the optical fiber receiver 230, relying on the lever principle, any type of defects on the surface of the cigarette pack 10 can be detected, thereby ensuring the uniformity of measuring surface defects and ensuring the defect detection effect.Secondly, by adjusting the distance between the two support plates 110 in the defect detection mechanism and rotating the number of measuring pieces 240 set on the mounting shaft 210, the defect detection mechanism can be coordinated with tobacco packaging machines of any specifications to realize the defect detection process on the surface of the cigarette package 10, thereby improving the applicability of the defect detection mechanism and reducing the installation and debugging costs of the defect detection mechanism. Finally, during the defect detection process, the rotation of the multiple measuring pieces 240 around the mounting shaft 210 is only associated with the surface condition of the cigarette package 10 being inspected, that is, during the inspection process, the inspection results are only associated with the surface condition of the cigarette package 10 being inspected, and the inspection results are not affected by changes in lighting, dust pollution, and other conditions in the workshop. While ensuring the accuracy of the inspection results, the defect detection mechanism is applicable to workshops of any working conditions, thereby further improving its applicability.

[0041] To further enhance the sensitivity of the multiple measuring members 240 rotating along the mounting shaft 210 and thereby improve the precision and accuracy of the measurement results, in some other embodiments, the mounting shaft 210 is provided with multiple bearings corresponding to the multiple measuring members 240, and the multiple measuring members 240 are provided with multiple bearings corresponding to the multiple bearings on the mounting shaft 210. The specific structure of the bearings is referenced in the prior art and will not be further described here.

[0042] For the sake of convenience, in this embodiment, five measuring members 240 are rotatably mounted on the mounting shaft 210. Figures 1 to 3 In other embodiments, the number of measuring members 240 rotatably mounted on the mounting shaft 210 may be increased or decreased based on the shape of the cigarette pack 10 when passing through the measuring channel, the required defect detection accuracy, etc., and is not limited to the five shown in the present embodiment.

[0043] To further improve detection accuracy during defect detection of cigarette packs 10, in this embodiment, the measurement assembly 200 further includes a plurality of measurement probes (not shown), which are disposed one-to-one at the first ends of the plurality of measurement members 240. The measurement probes are configured as mechanical styluses. During the detection process, the mechanical styluses directly contact the surface of the cigarette pack 10. As the cigarette pack 10 moves, defects are detected by the displacement changes of the mechanical styluses relative to the surface of the cigarette pack 10. This allows for accurate measurement of the size and location of minor surface defects such as depressions, protrusions, and damage. Therefore, when defects are present on the surface of the cigarette pack 10, the high-precision characteristics of the mechanical styluses further enhance the rotational accuracy of one or more measurement members 240 corresponding to the surface defect on the cigarette pack 10, thereby further improving detection accuracy.

[0044] Furthermore, an adjusting screw hole 243 is provided at the first end of the measuring member 240 , and the measuring probe is screwed into the corresponding adjusting screw hole 243 via an adjusting screw rod 250 .

[0045] Combine Figures 1 to 2 As shown, the adjustment screw hole 243 extends in the vertical direction. The measuring probe is mounted on the first end of the adjustment screw 250, and the second end of the adjustment screw 250 is threadedly connected to the adjustment screw hole 243. This arrangement, on the one hand, allows the distance between the lower end of the measuring probe and the first end of the measuring member 240 to be changed during defect detection by turning the adjustment screw 250, thereby changing the height of the measuring channel to adapt to and ensure the detection effect of cigarette packs 10 of different sizes. On the other hand, the connection of the measuring probe to the corresponding measuring member 240 via the adjustment screw 250 ensures the connection strength and stability of the measuring probe while improving the convenience of its installation.

[0046] Furthermore, the measuring member 240 includes a measuring section and a guide section. The guide section is fixedly connected to the lower end of the measuring section and extends in the front-to-back direction. The measuring probe is arranged on the side of the guide section away from the measuring section. The upper end of the measuring section extends upward. The measuring hole 242 is arranged in the measuring section, and the connecting hole 241 is arranged at the connection between the guide section and the measuring section.

[0047] Combine Figure 4 As shown, in this embodiment, the measuring member 240 is configured as an "L"-shaped plate. The "L"-shaped plate includes a long arm and a short arm that is shorter than the long arm. The short arm of the "L"-shaped plate serves as a guide section extending in the front-to-back direction, and the upper arm of the "L"-shaped plate extends in the upper-to-lower direction. A measuring hole 242 is provided at the upper end of the measuring section, a connecting hole 241 is provided at the junction of the guiding section and the measuring section, and a measuring probe is provided on the side of the guiding section facing away from the measuring section. With this configuration, when the measuring member 240 rotates about the mounting axis 210, the rotation amplitude of the guiding section is amplified at the upper end of the measuring section, thereby enhancing the intuitiveness of the rotation of the measuring member 240. Under this premise, the distance between the connecting hole 241 and the measuring hole 242 is maximized to increase the detection sensitivity and detection accuracy of the defect detection mechanism, thereby ensuring the detection effect.

[0048] Furthermore, a plurality of measuring holes 242 are provided at intervals on the measuring section along the up-down direction.

[0049] Combine Figure 4As shown, multiple measuring holes 242 are evenly spaced in the measuring section along the vertical direction. By arranging the optical fiber transmitter 220 and the optical fiber receiver 230 at the measuring holes 242 at different heights on the corresponding measuring section, the measurement accuracy and measurement sensitivity during surface defect detection can be adaptively adjusted. For example, when the defects of the cigarette pack 10 packaged by the current packaging machine are usually inconspicuous defects such as wrinkles in the transparent paper, when the cigarette pack 10 passes through the measurement channel, the measuring piece 240 corresponding to the wrinkle may not rotate obviously around the mounting shaft 210 because the wrinkle is small. Therefore, it is necessary to set the optical fiber transmitter 220 and the optical fiber receiver 230 in the measuring hole 242 at a higher position on the corresponding measuring section to increase the measurement accuracy and measurement sensitivity, so that even smaller wrinkles can cause the rotation amplitude of the upper end of the corresponding measuring section to change, thereby accurately measuring the surface defects of the cigarette pack 10; when the defects of the cigarette pack 10 packaged by the current packaging machine are usually more obvious defects such as inclusion of foreign matter, packaging displacement, and partial structural damage on the cigarette pack 10; when the cigarette pack 10 passes through the measurement channel, the measuring piece 240 corresponding to the above defects usually causes the mounting shaft 210 to rotate obviously, so the measurement accuracy and measurement sensitivity can be correspondingly reduced; that is, the optical fiber transmitter 220 and the optical fiber receiver 230 are set in the measuring hole 242 at a lower position on the corresponding measuring section.

[0050] In other embodiments, the diameter of the measurement holes 242 can be varied to adjust measurement accuracy and sensitivity. For example, the diameter of the measurement holes 242 in each measurement segment can be uniformly reduced or increased; or the diameters of multiple measurement holes 242 in the same measurement segment can be sequentially increased or decreased in the vertical direction. For example, the diameters of the multiple measurement holes 242 in the same measurement segment decrease gradually from bottom to top. The specific configuration can be adapted to actual circumstances and is not specifically limited here.

[0051] Preferably, the elastic reset assembly 300 includes a reset rod 310 and a plurality of tension springs 320. The reset rod 310 is connected to the support assembly 100 corresponding to the middle of the plurality of measuring members 240 and is located in front of the plurality of measuring members 240. The two ends of the plurality of tension springs 320 are connected one-to-one between the middle of the plurality of measuring members 240 and the reset rod 310.

[0052] Combine Figures 1 to 3As shown, in this embodiment, a reset rod 310 is disposed in front of the measuring member 240 and above the mounting shaft 210. The first ends of the plurality of tension springs 320 are connected to the middle portions of the plurality of measuring segments, one by one, and the second ends of the plurality of tension springs 320 are connected to the reset rod 310. When a cigarette pack 10 passes through the measuring channel, the plurality of measuring members 240 rotate backward about the mounting shaft 210. At this time, the plurality of measuring segments move away from the reset rod 310, and the plurality of tension springs 320 are subjected to force and stretched. After the cigarette pack 10 passes through the inspection channel, the plurality of measuring members 240 no longer contact the cigarette pack 10, and neither the plurality of measuring members 240 nor the plurality of tension springs 320 are subjected to force. At this time, the plurality of tension springs 320 retract to return to their original state, pulling the corresponding measurement segments and the measuring member 240 back to their original state, facilitating surface defect inspection for the next cigarette pack 10. When the working time of the tension spring 320 reaches the set time, the plurality of tension springs 320 can be removed and replaced with new tension springs 320 to ensure the detection effect of the defect detection mechanism.

[0053] In some other embodiments, the elastic reset assembly 300 may include a reset rod 310 and a plurality of compression springs. Specifically, the reset rod 310 is arranged in front of the measuring member 240 and above the mounting shaft 210. The first ends of the plurality of compression springs are connected to the middle of the plurality of guide sections in a one-to-one correspondence, and the second ends of the plurality of compression springs are connected to the reset rod 310. When the cigarette pack 10 passes through the measuring channel, the plurality of measuring members 240 rotate backward around the mounting shaft 210. At this time, the plurality of guide sections move toward the reset rod 310, and the plurality of compression springs are compressed by force. After the cigarette pack 10 passes through the detection channel, the plurality of measuring members 240 no longer contact the cigarette pack 10. The plurality of measuring members 240 and the plurality of compression springs are not subjected to force. At this time, the plurality of compression springs rebound to return to their original state and push the corresponding guide sections and the measuring member 240 to return to their original state.

[0054] In the process of the elastic reset assembly 300 driving the multiple measuring pieces 240 to return to their original state, the tension spring 320 may cause the corresponding measuring piece 240 to rotate excessively, causing the guide section to tilt from the back to the front toward the horizontal plane, so that the height of the measuring channel gradually decreases, resulting in an increase in the difficulty of the cigarette pack 10 passing through the measuring channel. At the same time, the measuring probe may scratch the surface of the cigarette pack 10. In order to avoid the above situation, in this embodiment, the defect detection mechanism also includes a limit assembly 400, and the limit assembly 400 includes a limit rod 410. The limit rod 410 is connected to the support assembly 100 corresponding to the elastic reset assembly 300 and is located between the reset rod 310 and the multiple measuring pieces 240. Specifically combined Figures 1 to 3As shown, the limit rod 410 is located above the mounting shaft 210 and between the reset rod 310 and the multiple measuring members 240. When the multiple tension springs 320 retract to return to their original positions and pull the corresponding measuring sections and measuring members 240 back to their original positions, the multiple measuring sections abut against the limit rod 410, and the multiple guide sections are parallel to the horizontal plane, ensuring that the height of the measuring channel remains constant along the front direction. In this embodiment, the limit rod 410 is positioned below the reset rod 310 in the vertical direction. In other embodiments, the limit rod 410 may also be positioned above the reset rod 310 in the vertical direction, and the present invention is not limited to the illustration in this embodiment.

[0055] Furthermore, in this embodiment, the limit assembly 400 also includes a buffer member 420. The buffer member 420 is disposed on the side of the limit rod 410 near the multiple measuring members 240 to cushion the multiple measuring sections and the limit rod 410. This prevents damage to the central portions of the multiple measuring sections when they abut against the limit rod 410. This also prevents loud noise caused by the abutment of the multiple measuring sections against the limit rod 410, thereby ensuring operator comfort within the work area. The buffer member 420 can be configured as a silicone member, a rubber member, a plastic foam member, or the like. The specific configuration can be adapted to actual needs and is not specifically limited in this embodiment.

[0056] Furthermore, the support assembly 100 further includes two support base plates 120 , and the two support plates 110 are correspondingly and movably disposed on the two support base plates 120 .

[0057] Combine Figures 1 to 3 As shown, an adjustment hole 121 can be provided on one of the support plate 110 and the corresponding support base plate 120. The adjustment hole 121 extends in a vertically elongated strip shape, and a mounting hole is provided on the other. A mounting connector passes through the corresponding mounting hole and the adjustment hole 121 in sequence to connect the support plate 110 to the corresponding support base plate 120. By adjusting the relative position of the mounting connector within the corresponding adjustment hole 121, the relative position of the support plate 110 and the corresponding support base plate 120 in the vertical direction can be adjusted, thereby changing the height of the measurement channel to adapt the measurement channel to cigarette packs 10 of different specifications.

[0058] In some other embodiments, a plurality of adjustment holes 121 are provided, and the plurality of adjustment holes 121 are all provided as circular holes and are spaced apart in the up and down directions on one of the support plate 110 and the support base plate 120, and a mounting hole is provided on the other one, and a connecting piece is passed through the mounting hole and the adjustment holes 121 at different height positions to change the height of the measuring channel.

[0059] During the packaging process of the cigarette package 10, due to the characteristics of the packaging machine, defects are likely to appear on the two side walls with larger areas of the cigarette package 10. The above-mentioned defect measurement device can complete defect detection on one of the large-area side walls of the cigarette package 10 during the detection process. After the cigarette package 10 passes the first defect detection, it is flipped 180° and passed through the measurement channel again to perform defect detection on the other large-area side wall of the cigarette package 10.

[0060] To further improve the efficiency of defective part detection, this embodiment includes two sets of measuring assemblies 200, spaced apart vertically and arranged relative to each other. These two sets of measuring assemblies 200 cooperate with the two support plates 110 to form a measurement channel. The elastic reset assemblies 300 are provided in two sets, one corresponding to each measuring assembly 200. As a result, when a cigarette pack 10 passes through the measurement channel, the two sets of measuring assemblies 200 can simultaneously perform surface defect detection on the two large-area sidewalls of the cigarette pack 10, thereby improving detection efficiency and reducing time costs.

[0061] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A defect detection mechanism for detecting surface defects of a cigarette pack (10), characterized in that: The defect detection mechanism includes: A support assembly (100) includes two support plates (110), wherein the two support plates (110) are arranged relative to each other at intervals in the left-right direction; The measuring assembly (200) comprises a mounting shaft (210), an optical fiber transmitter (220), an optical fiber receiver (230) and a plurality of measuring members (240), wherein both ends of the mounting shaft (210) are fixedly mounted on the two support plates (110), each measuring member (240) is provided with a connecting hole (241), and the plurality of measuring members (240) are rotatably connected to the mounting shaft (210) through the corresponding connecting holes (241), so that the first end of each measuring member (240) cooperates with the two support plates (110) to form a cigarette pack (10) The measuring passage is provided, wherein each measuring member (240) has a working state and an initial state, and the height of the first end of each measuring member (240) in the working state is higher than the height of the first end of each measuring member (240) in the initial state; the second section of each measuring member (240) extends upward and is provided with a measuring hole (242); the optical fiber transmitter (220) is provided in the measuring hole (242) on the leftmost measuring member (240), and the optical fiber receiver (230) is provided in the measuring hole (242) on the rightmost measuring member (240); An elastic reset assembly (300) is arranged between the support assembly (100) and each of the measuring members (240).

2. The defect detection mechanism according to claim 1, characterized in that: The measuring assembly (200) further comprises a plurality of measuring probes, wherein the plurality of measuring probes are arranged at the first ends of the plurality of measuring members (240) in a one-to-one correspondence.

3. The defect detection mechanism according to claim 2, characterized in that: The first end of the measuring member (240) is provided with an adjusting screw hole (243), and the measuring probe is screwed to the corresponding adjusting screw hole (243) via an adjusting screw rod (250).

4. The defect detection mechanism according to claim 2, characterized in that: The measuring member (240) comprises a measuring section and a guide section, wherein the guide section is fixedly connected to the lower end of the measuring section and extends in the front-back direction, the measuring probe is arranged on a side of the guide section away from the measuring section, the upper end of the measuring section extends upward, the measuring hole (242) is arranged in the measuring section, and the connecting hole (241) is arranged at the connection between the guide section and the measuring section.

5. The defect detection mechanism according to claim 4, characterized in that: Along the up-down direction, a plurality of measuring holes (242) are arranged at intervals on the measuring section.

6. The defect detection mechanism according to claim 1, characterized in that: The elastic reset assembly (300) includes a reset rod (310) and a plurality of tension springs (320). The reset rod (310) is connected to the support assembly (100) corresponding to the middle parts of the plurality of measuring members (240) and is located in front of the plurality of measuring members (240). The two ends of the plurality of tension springs (320) are connected one-to-one between the middle parts of the plurality of measuring members (240) and the reset rod (310).

7. The defect detection mechanism according to claim 6, characterized in that: The defect detection mechanism further comprises a limiting assembly (400), wherein the limiting assembly (400) comprises a limiting rod (410), wherein the limiting rod (410) is connected to the supporting assembly (100) corresponding to the elastic reset assembly (300), and is located between the reset rod (310) and the plurality of measuring members (240).

8. The defect detection mechanism according to claim 7, characterized in that: The limiting assembly (400) further includes a buffer member (420), and the buffer member (420) is arranged on a side of the limiting rod (410) close to the plurality of measuring members (240).

9. The defect detection mechanism according to claim 1, characterized in that: The support assembly (100) further comprises two support base plates (120), and the two support plates (110) are arranged on the two support base plates (120) in a one-to-one correspondence and can be lifted and lowered.

10. The defect detection mechanism according to claim 1, characterized in that: The measuring components (200) are provided in two groups, and the two groups of measuring components (200) are arranged at intervals in the vertical direction. The two groups of measuring components (200) cooperate with the two support plates (110) to form the measuring channel. The elastic reset components (300) are provided in two groups in a one-to-one correspondence with the measuring components (200).

Images