A cigarette rod missing packet detection device and a cigarette rod conveyor

Abstract

The utility model relates to tobacco packaging machinery automation technical field provides a kind of cigarette bar missing package detection device and cigarette bar conveyor.The cigarette bar missing package detection device includes at least two detection units, synchronous annunciator, data processing unit and alarm unit.Detection unit is located in the upper and lower sides of cigarette bar conveying assembly, and cigarette bar conveying assembly is used to transport cigarette bar, and detection unit is used to detect whether the cigarette bar inside is missing;Synchronous annunciator is located in at least one side of cigarette bar conveying assembly, and synchronous annunciator is used to detect whether cigarette bar is in place;Data processing unit is electrically connected with detection unit and synchronous annunciator, and data processing unit is used to control detection unit and synchronous annunciator work;Alarm unit is electrically connected with data processing unit.The utility model solves the larger false detection, missing detection risk defects of cigarette bar missing package detection device in the tobacco packaging machine in the prior art, realizes the probability of reducing cigarette bar missing package false detection, missing detection, and further improves the quality of product.

Description

Technical Field

[0001] This utility model relates to the field of tobacco packaging machinery automation technology, and in particular to a cigarette pack missing detection device and a cigarette pack conveyor. Background Technology

[0002] During operation, tobacco packaging machines may experience instances of missing cigarette packs. Therefore, to reduce the probability of this happening, a cigarette pack shortage detection device is typically installed on the machine. Existing packaging machines include those with built-in cigarette pack shortage detection devices and those added later, such as negative pressure cigarette pack shortage detection devices.

[0003] However, the cigarette pack missing detection device built into the packaging machine only has a detection unit at the top of the cigarette pack, not at the bottom. Therefore, when the upper cigarette pack is suspended due to compression from the packaging box, the missing cigarette pack at the bottom will not be detected, leading to false detections and missed detections.

[0004] The proper functioning of the detector in the subsequently added negative pressure cigarette pack missing detection device is closely related to the time when the cigarette pack enters the detection area and the start and end times of the detection process. If the cigarette pack enters the detection area too early or too late, false detections or missed detections will occur, thus increasing the risk of missing cigarette packs. Furthermore, the accuracy of the negative pressure missing cigarette pack detection is also affected by air pressure fluctuations and pore blockage.

[0005] In order to reduce the probability of false or missed detections of missing cigarette packs in tobacco packaging machines, it is necessary to design a new type of cigarette pack missing detection device. Utility Model Content

[0006] This utility model provides a cigarette pack missing detection device and a cigarette pack conveyor to solve the system design defects of existing tobacco packaging machines in the process of detecting cigarette pack missing. This utility model reduces the probability of false detection and false detection of cigarette pack missing, thereby improving the product quality of tobacco packaging machines.

[0007] This utility model provides a device for detecting missing packs of cigarette packs, comprising: At least two detection units are located on the upper and lower sides of the cigarette pack conveying assembly. The detection units are used to detect whether the cigarette pack inside the cigarette pack is missing. A synchronization signal is provided on at least one side of the cigarette stick conveying assembly, and the synchronization signal is used to detect whether the cigarette stick is in place; A data processing unit is electrically connected to the detection unit and the synchronization signal device, and the data processing unit is used to control the operation of the detection unit and the synchronization signal device; An alarm unit, electrically connected to the data processing unit, sounds an alarm in the event that the cigarette pack is missing.

[0008] According to the present invention, a cigarette pack missing detection device is provided, wherein the detection unit includes a first mounting frame and a plurality of detectors, wherein the plurality of detectors are spaced apart on the first mounting frame, and the detectors are configured in one-to-one correspondence with the cigarette packs.

[0009] According to the present invention, a cigarette pack missing detection device is provided, wherein the detector includes a capacitive sensor.

[0010] According to the present invention, a cigarette pack missing detection device is provided, wherein the synchronization signal device includes a non-contact photoelectric sensor.

[0011] According to the present invention, a cigarette pack missing detection device is provided, wherein the alarm unit includes at least one of a buzzer and an audible and visual alarm.

[0012] According to the present invention, in a cigarette pack missing detection device, the distance from the synchronizing signal device to the cigarette pack is less than the distance from the detector on the same side to the cigarette pack.

[0013] According to the present invention, a cigarette pack missing detection device is provided, wherein a detection hole is provided in the middle of the first mounting frame, and the detector passes through the detection hole.

[0014] According to the present invention, a cigarette pack missing detection device is provided, wherein the first mounting frame is detachably provided with a second mounting frame, and the synchronization signal is detachably provided on the second mounting frame.

[0015] This utility model also provides a cigarette pack conveyor, including the cigarette pack missing detection device and the cigarette pack conveying assembly described in any of the above embodiments.

[0016] According to the cigarette pack conveyor provided by this utility model, the cigarette pack conveying assembly includes a first conveyor belt and a second conveyor belt, a gap is provided between the first conveyor belt and the second conveyor belt, and the cigarette pack missing detection device is located on the upper and lower sides of the gap.

[0017] The cigarette pack missing detection device provided by this utility model incorporates a synchronization signal. This signal first detects whether the cigarette pack is in place; only after the cigarette pack is detected in place will the detection unit detect whether the pack is missing. This design avoids the false or missed detections caused by the pack entering the detection area prematurely or delayed, as is common in existing technologies, significantly improving product quality. Secondly, this utility model features detection units on both the upper and lower sides of the cigarette pack conveying assembly. This allows for the detection of both the upper and lower layers of packs within the cigarette pack, greatly improving the accuracy of the detection results.

[0018] The cigarette pack conveyor provided by this utility model includes a cigarette pack missing detection device. This device has the function of detecting both upper and lower cigarette packs simultaneously, and avoids the system design defects of negative pressure missing pack detection caused by air pressure fluctuations and air hole blockage. In addition, it greatly reduces the requirements for detection phase. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the cigarette pack missing detection device provided by this utility model; Figure 2 This is a schematic diagram of the structure of the first mounting frame of the cigarette pack missing detection device provided by this utility model; Figure 3 This is a front view of the second mounting bracket of the cigarette pack missing detection device provided by this utility model; Figure 4 This is a side view of the second mounting bracket of the cigarette pack missing detection device provided by this utility model; Figure 5 This is a schematic diagram of the structure of the cigarette pack conveying component of the cigarette pack missing detection device provided by this utility model.

[0021] Figure label: 100: Detection unit; 110: First mounting bracket; 111: Detection hole; 112: First mounting hole; 113: First connection hole; 120: Detector; 200: Synchronizer; 300: Data processing unit; 400: Alarm unit; 500: cigarette pack; 510: cigarette bag; 600: Cigarette bar conveying assembly; 610: First conveyor belt; 620: Second conveyor belt; 700: Second mounting bracket; 710: Second mounting hole; 720: Second connection hole. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] The following is combined with Figures 1-5 Describe the structure and working principle of this utility model.

[0024] Reference Figure 1 This utility model provides a cigarette pack missing detection device, comprising at least two detection units 100, a synchronization signal 200, a data processing unit 300, and an alarm unit 400. The detection units 100 are located on the upper and lower sides of a cigarette conveying assembly 600, which transports cigarettes 500, and the detection units 100 are used to detect whether the cigarette pack 510 inside the cigarette 500 is missing. The synchronization signal 200 is located on at least one side of the cigarette conveying assembly 600 and is used to detect whether the cigarette 500 is in place. The data processing unit 300 is electrically connected to the detection units 100 and the synchronization signal 200, and is used to control the operation of the detection units 100 and the synchronization signal 200. The alarm unit 400 is electrically connected to the data processing unit 300, and sounds an alarm when the cigarette pack 510 is missing. It is understood that the synchronization signal 200 can be located above or below the cigarette conveying assembly 600. When there is only one synchronization signal 200, it is preferably placed above the conveying assembly 600.

[0025] In the above structure, after the tobacco stick 500 is transported to the detection area by the tobacco stick conveying assembly 600, the synchronization signal 200 detects whether it has reached the predetermined position. Once the tobacco stick 500 is in place, the synchronization signal 200 sends a signal to the data processing unit 300, indicating that the tobacco stick is ready for detection. After receiving the signal from the synchronization signal 200, the data processing unit 300 controls the detection unit 100 to start the detection process. Since the detection unit 100 is located on the upper and lower sides of the tobacco stick conveying assembly 600, it can detect whether the upper and lower layers of tobacco packs 510 inside the tobacco stick are missing. If the detection unit 100 finds any missing tobacco packs 510, it will feed this information back to the data processing unit 300. After analyzing the data received from the detection unit 100, if the data processing unit 300 confirms that there are missing tobacco packs, it triggers the alarm unit 400 to sound an alarm and notify relevant personnel to take appropriate measures.

[0026] This invention incorporates a synchronization signal 200, which pre-detects whether the tobacco stick 500 is in place. Only after the tobacco stick 500 is detected in place will the detection unit 100 detect whether the tobacco pack 510 is missing. This design avoids the false or missed detections caused by the tobacco pack entering the detection area prematurely or delayed, as is common in existing technologies, significantly improving product quality. Furthermore, this invention features detection units 100 on both the upper and lower sides of the tobacco stick conveying assembly 600. This allows for the detection of both the upper and lower layers of tobacco packs 510 within the tobacco stick 500, greatly improving the accuracy of the detection results.

[0027] In some possible embodiments, to further improve the performance and applicability of the cigarette pack defect detection device, the data processing unit 300 can integrate more advanced data analysis algorithms to improve detection accuracy. By learning from historical data, the system can identify different types of defect patterns, thereby reducing the false alarm rate. A synchronization signal 200 is located on at least one side of the cigarette pack conveying assembly 600 to monitor whether the cigarette pack 500 has reached the predetermined position and send a signal to the data processing unit 300, ensuring that the detection unit 100 only starts the detection process when the cigarette pack 500 is fully in place. To enhance the system's real-time monitoring capabilities, operators can connect to the central control system via a network to remotely view and manage the production line status and detection results. Once a problem is detected, not only will an alarm be issued immediately, but production parameters can also be automatically adjusted or the production line can be paused to prevent the problem from escalating. Furthermore, to further reduce the risk of missed detections, after the initial inspection, the system can perform a secondary inspection of suspected defective cigarette packs, using higher-precision sensors or different detection technologies for detailed examination. This multi-level detection mechanism ensures higher detection accuracy and reliability.

[0028] To facilitate routine maintenance and troubleshooting, the system features a user-friendly interface with functions such as fault diagnosis guides and operation manuals. These functions help users quickly locate problems and take corresponding measures to optimize operational processes. Simultaneously, the system is designed with good compatibility and scalability in mind, making it easy to integrate with other production equipment or management systems. Through standardized interfaces and modular design, users can add new functional modules as needed, such as linking with other quality control systems or uploading data to the cloud for big data analysis. This not only improves the functionality and efficiency of the existing system but also provides possibilities for future technological upgrades and functional expansion, enabling the cigarette pack shortage detection device to play a role in more scenarios and meet ever-changing market demands. The entire system ensures an efficient and reliable workflow through close collaboration between its components.

[0029] Reference Figure 1In some embodiments of this utility model, the detection unit 100 includes a first mounting frame 110 and a plurality of detectors 120. The plurality of detectors 120 are spaced apart on the first mounting frame 110, and the detectors 120 are arranged in a one-to-one correspondence with the cigarette packs 510.

[0030] In the above structure, the one-to-one correspondence between detectors 120 and cigarette packs 510 not only improves detection accuracy but also simplifies the data analysis process of the data processing unit 300. Each detector 120 detects a cigarette pack 510 at a specific location and directly feeds the result back to the data processing unit 300. If a cigarette pack 510 is missing, the corresponding detector 120 immediately sends a signal to the data processing unit 300, triggering the alarm unit 400 to sound an alarm. This approach makes the system response faster and more accurate, reducing unnecessary delays and errors.

[0031] Furthermore, the design of the detection unit 100 allows for adjustment of the number and position of the detectors 120 according to different cigarette pack specifications, to accommodate cigarette packs 510 of different sizes and arrangements. This flexibility enables the system to maintain efficient detection capabilities when the production line changes, ensuring a high level of quality control even under different production conditions.

[0032] In some possible embodiments, to further improve detection accuracy, the detection unit 100 may be equipped with an automatic calibration function. This function enables the detector 120 to self-calibrate before each detection, ensuring it is in optimal working condition. This self-calibration mechanism can be implemented through a built-in standard reference or software algorithm, thereby guaranteeing the consistency and reliability of the detection results. Simultaneously, the detection unit 100 may be equipped with a data storage module to record the results and related parameters of each detection. This data can not only assist operators in fault diagnosis and maintenance but can also be uploaded to the central control system for big data analysis, facilitating long-term monitoring of production quality and optimization of production processes.

[0033] Furthermore, in terms of cooperation with the synchronization signal 200, the detection unit 100 can further optimize the signal transmission and processing mechanism to ensure that the detector 120 will only start the detection process when the tobacco stack 500 is fully in place. This precise timing control mechanism reduces false detections or missed detections caused by the tobacco stack entering the detection area too early or too late, thus improving the stability and reliability of the entire system.

[0034] This configuration allows the detection unit 100 to not only accurately detect cigarette packs 510, but also provides greater flexibility and adaptability. The system can be adjusted according to different production needs, ensuring efficient quality control under various conditions. Overall, these expansions not only enhance the functionality and efficiency of the existing system, but also provide possibilities for future technological upgrades and functional expansions, enabling the cigarette pack shortage detection device to function in more scenarios and meet ever-changing market demands. The close collaboration between the various components ensures a more efficient and reliable workflow for the entire system.

[0035] In some embodiments of this invention, the detector 120 includes a capacitive sensor.

[0036] In the above structure, detector 120 employs a capacitive sensor. This type of sensor determines the presence or characteristics of a target object by detecting changes in capacitance. The working principle of a capacitive sensor is based on changes in an electric field. When an object approaches the sensor's sensing area, it causes a change in capacitance. This change can be accurately measured and converted into an electrical signal for processing.

[0037] Because capacitive sensors are highly sensitive to changes in the medium, they can accurately detect the presence and integrity of the cigarette pack 510. For example, during detection, if a cigarette pack 510 is missing or defective, the sensor will detect a change in capacitance and transmit this information to the data processing unit 300. This method not only improves detection accuracy but also effectively avoids wear or other mechanical failures caused by physical contact, extending the equipment's lifespan.

[0038] Furthermore, capacitive sensors feature rapid response, enabling detection to be completed in a very short time, which is especially important for high-speed production lines. The sensors can perform detection without direct contact with the cigarette pack 510, reducing the risk of damage to the product surface and also lowering maintenance costs and downtime.

[0039] Capacitive sensors also possess excellent anti-interference capabilities, enabling them to operate stably in complex industrial environments. Even with surrounding electromagnetic interference or other environmental factors, the sensors can still provide reliable detection results. This allows the system to maintain efficient and stable operation under various production conditions.

[0040] In its cooperation with the synchronizing signal 200, the capacitive sensor can initiate the detection process after the tobacco stack 500 is fully in place, based on the signal provided by the synchronizing signal 200. This precise timing control mechanism reduces false detections or missed detections caused by the tobacco stack entering the detection area too early or too late, thus improving the stability and reliability of the entire system.

[0041] In some possible embodiments, to further improve system reliability, the capacitive sensor may be equipped with an automatic calibration function. This self-calibration mechanism ensures that the sensor is in optimal operating condition before each test, thereby guaranteeing the consistency and reliability of the test results. Through built-in standard references or software algorithms, the system can automatically adjust to adapt to different environmental conditions and production requirements.

[0042] Of course, detector 120 can also be other types of detectors. Specifically, the following sensors can be used as alternatives: ① Optical Sensor: An optical sensor detects the presence and characteristics of an object by emitting a light beam and receiving the reflected light. When the cigarette pack 510 passes through the detection area, the optical sensor can determine whether the cigarette pack 510 is present or defective based on whether the light beam is blocked or reflected back. This sensor features high precision and fast response, making it suitable for high-speed production lines.

[0043] ② Ultrasonic Sensor: The ultrasonic sensor measures distance and detects the presence of objects by emitting ultrasonic waves and receiving the reflected sound waves. When the cigarette pack 510 passes through the detection area, the ultrasonic sensor can determine whether the cigarette pack 510 is present or missing based on the received echo signal. This sensor is unaffected by lighting conditions and can operate stably in harsh environments.

[0044] ③ X-ray sensor: An X-ray sensor uses the ability of X-rays to penetrate objects to generate images, thereby detecting internal structure and integrity. For the inspection of cigarette pack 510, an X-ray sensor can be used to check for internal defects or other anomalies. Although this type of sensor is more expensive, it offers very high detection accuracy and reliability, making it particularly suitable for applications with extremely high inspection requirements.

[0045] In some embodiments of this utility model, the synchronization signal device 200 is a non-contact photoelectric sensor. Specifically, the synchronization signal device 200 is a Keyence FU-6F diffuse reflection photoelectric switch. The diffuse reflection photoelectric switch integrates the transmitter and receiver, and features small size, simple and convenient installation, fast response, strong anti-interference ability, and high reliability. Specifically, because the cigarette pack is wrapped in a transparent paper with a glossy surface, when the cigarette pack passes by, the transparent paper and the reflector formed by the cigarette pack can reflect a sufficient amount of light, thereby meeting the operating environment requirements of the photoelectric switch.

[0046] In some embodiments of this utility model, the alarm unit 400 includes at least one of a buzzer and an audible and visual alarm.

[0047] The alarm unit 400 includes at least one of a buzzer and an audible and visual alarm. This design ensures that an alarm can be issued promptly when a missing or other abnormal situation is detected in a cigarette pack 510. When the data processing unit 300 confirms that a cigarette pack 510 is missing or defective, it triggers the alarm unit 400 to sound an alarm. By using the buzzer, the system can emit an audible signal immediately to alert on-site operators and prompt them to take appropriate measures. This audible alarm is direct and immediate, penetrating background noise in noisy production environments to ensure that staff can quickly receive the information.

[0048] Meanwhile, if the alarm unit 400 is equipped with an audible and visual alarm, it will not only emit an audible signal but also further enhance the alarm effect by flashing lights. This dual alarm mechanism improves the visibility and recognizability of the alarm, especially in low light conditions or when observation from a distance is required. The visual signal can effectively supplement the audible signal, ensuring that operators can notice the alarm information in a timely manner regardless of their location.

[0049] It should be noted that the design of the alarm unit 400 can be adjusted according to specific needs. For example, in some scenarios, a buzzer alone may be sufficient; while in other cases, to ensure higher alertness and response speed, both a buzzer and an audible and visual alarm can be used simultaneously. This flexibility allows the system to be optimized for different working environments and requirements, ensuring that alarm information can be effectively conveyed under any circumstances.

[0050] In some specific embodiments, the alarm unit 400 may adopt the LTE-1101 warning light. This warning light is made of a shock-resistant incandescent bulb and a high-quality resin shell, and adopts an internationally advanced turbine structure and a scientific parabolic reflector design. It has the advantages of long light transmission distance, no dead spots, and loud alarm sound, and is suitable for harsh working environments such as smoke and noise.

[0051] Reference Figure 1 In some embodiments of this utility model, the distance from the synchronization signal 200 to the smoke bar 500 is less than the distance from the detector 120 on the same side to the smoke bar 500.

[0052] By positioning the synchronizing signal 200 closer to the smoke bar 500 than the detector 120, the system can identify the position of the smoke bar 500 earlier and more accurately, providing a precise time reference for subsequent detection. This design not only improves the accuracy and reliability of detection but also optimizes the system's response speed and efficiency, ensuring efficient and stable operation in complex and ever-changing production environments. The close collaboration between the various components ensures a more efficient and reliable workflow for the entire system.

[0053] Reference Figure 1In some embodiments of this utility model, a detection hole 111 is provided in the middle of the first mounting bracket 110, and a detector 120 passes through the detection hole 111. First mounting holes 112 are provided at both ends of the detection hole 111, and the first mounting holes 112 are used to mount the first mounting bracket 110. First connecting holes 113 are provided on the upper and lower sides of the detection hole 111.

[0054] In the above structure, the detection hole 111 provides a clear path, enabling the detector 120 to be accurately aligned with the position of the cigarette pack 510. Since the detector 120 passes through the detection hole 111, its sensing area can directly contact or be close to the cigarette pack 510, thereby improving the accuracy and reliability of the detection. This design ensures that the detector 120 operates in the optimal position, avoiding detection errors caused by external interference or other factors.

[0055] Furthermore, the design of the detection orifice 111 helps to fix the position of the detector 120, keeping it stable throughout the detection process. This not only helps improve the consistency of detection but also reduces fluctuations in detection results caused by changes in the position of the detector 120. A stable detection environment is crucial for ensuring the accuracy of detection results, especially on high-speed production lines where any slight change can affect the final detection outcome.

[0056] Furthermore, the design of the inspection port 111 facilitates maintenance and adjustment. If the detector 120 needs to be replaced or calibrated, the operator can easily perform the operation through the inspection port 111 without disassembling the entire first mounting bracket 110. This convenience not only improves maintenance efficiency but also reduces downtime and enhances the overall operating efficiency of the production line.

[0057] Reference Figure 1 In some embodiments of this utility model, the first mounting bracket 110 is detachably provided with a second mounting bracket 700, and the synchronization signal device 200 is detachably provided on the second mounting bracket 700. Specifically, the second mounting bracket 700 is Z-shaped. The second mounting bracket 700 is provided with a second mounting hole 710 and a second connecting hole 720. The second mounting hole 710 is used to install the synchronization signal device 200, and the second connecting hole 720 is correspondingly provided with the first connecting hole 113, and the two are connected by bolts.

[0058] This utility model also provides a conveying scheme for cigarette stick detection using a cigarette stick conveyor, including a cigarette stick missing pack detection device and a cigarette stick conveying assembly 600 as described in any of the above embodiments. The cigarette stick conveyor is located at the end of the tobacco packaging machine to further inspect and convey the packaged cigarette sticks.

[0059] Reference Figure 5In some embodiments of this utility model, the cigarette pack conveying assembly 600 includes a first conveyor belt 610 and a second conveyor belt 620, with a gap between the first conveyor belt 610 and the second conveyor belt 620. A cigarette pack shortage detection device is located on the upper and lower sides of the gap. The main function of the gap is to provide space for the detection by the synchronization signal device 200 and the detector 120, facilitating the transmission of detection signals.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for detecting missing packs of cigarette packs, characterized in that, include: At least two detection units (100) are provided on the upper and lower sides of the cigarette pack (600), and the detection units (100) are used to detect whether the cigarette pack (510) inside the cigarette pack (500) is missing; A synchronization signal (200) is disposed on at least one side of the cigarette stick conveying assembly (600), and the synchronization signal (200) is used to detect whether the cigarette stick (500) is in position; A data processing unit (300) is electrically connected to the detection unit (100) and the synchronization signal device (200), and the data processing unit (300) is used to control the operation of the detection unit (100) and the synchronization signal device (200); An alarm unit (400) is electrically connected to the data processing unit (300) and sounds an alarm when the cigarette pack (510) is missing.

2. The cigarette pack missing detection device according to claim 1, characterized in that, The detection unit (100) includes a first mounting frame (110) and a plurality of detectors (120). The plurality of detectors (120) are spaced apart on the first mounting frame (110), and the detectors (120) are arranged in a one-to-one correspondence with the cigarette pack (510).

3. The cigarette pack missing detection device according to claim 2, characterized in that, The detector (120) includes a capacitive sensor.

4. The cigarette pack missing detection device according to claim 1, characterized in that, The synchronization signal device (200) includes a non-contact photoelectric sensor.

5. The cigarette pack missing detection device according to any one of claims 1-4, characterized in that, The alarm unit (400) includes at least one of a buzzer and an audible and visual alarm.

6. The cigarette pack missing detection device according to claim 2, characterized in that, The distance from the sync signal (200) to the cigarette bar (500) is less than the distance from the detector (120) on the same side to the cigarette bar (500).

7. The cigarette pack missing detection device according to claim 6, characterized in that, The first mounting bracket (110) has a detection hole (111) in the middle, and the detector (120) passes through the detection hole (111).

8. The cigarette pack missing detection device according to claim 7, characterized in that, The first mounting bracket (110) is detachably provided with a second mounting bracket (700), and the synchronization signal device (200) is detachably provided on the second mounting bracket (700).

9. A cigarette pack conveyor, characterized in that, Includes the cigarette pack missing detection device as described in any one of claims 1-8 and the cigarette pack conveying assembly (600).

10. The cigarette bar conveyor according to claim 9, characterized in that, The cigarette pack conveying assembly (600) includes a first conveyor belt (610) and a second conveyor belt (620), with a gap between the first conveyor belt (610) and the second conveyor belt (620), and the cigarette pack missing detection device is located on the upper and lower sides of the gap.

Images