A cigarette case flip return detection device and its detection method

Abstract

The present invention belongs to the technical field of measuring devices, and particularly relates to a cigarette case flip cover return detection device and a detection method thereof, which include a physical property test bench and a mounting frame. The physical property test bench includes a bench body, a lifting arm, a mounting arm, and a pressure detection head. The physical property test bench is connected with a height measurement mechanism for monitoring the lifting height of the mounting arm. The mounting frame is installed on the bench body, and a mounting plate is vertically installed on the mounting frame. A positioning mechanism for fixing the box body is installed on the mounting plate, a flipping mechanism is rotatably installed on the mounting plate, a clamping mechanism for clamping the flip cover is installed on the flipping mechanism, and a fixing mechanism for fixing the box body and the flip cover is also installed on the mounting frame. The purpose is: through the mutual cooperation of the positioning mechanism, the flipping mechanism, the clamping mechanism, the fixing mechanism, and the physical property test bench, the automatic flipping degree of the flip cover after multiple opening and closing operations is detected, the repeatability of the detection is improved, and the detection result is supported by specific data, thereby improving the reliability of the detection.

Description

Technical Field

[0001] The present invention belongs to the technical field of measuring devices, and particularly relates to a cigarette case flip return detection device and a detection method thereof. Background Art

[0002] Among the cigarettes sold on the market currently, the small packages of cigarettes are usually hard-pack flip-top cigarette cases and soft-pack cigarette cases, and most of them are packed with 20 cigarettes. The openings of the hard-pack flip-top cigarette cases are all on the short side of the rectangular cigarette case, and the opening surface is transversely cut with the longitudinal axis of the cigarette case.

[0003] During the continuous use of the hard-pack flip-top cigarette case, while the number of cigarettes in the cigarette case gradually decreases, each time a cigarette is taken, the flip of the cigarette case needs to be opened, and after the cigarette is taken, the flip needs to be closed again.

[0004] As the number of cigarettes in the cigarette case decreases, and at the same time, after the flip is opened and closed multiple times, when the flip is in the closed state and there is no external force, the flip will automatically turn outwards by a certain angle relative to the box body under the action of its own elasticity. At this time, the flip and the box body are in a state of not being tightly closed. If the degree of automatic outward turning is too large, according to the feedback results of the social research conducted by our company, users will think it is a quality problem of the cigarette case, which will seriously affect consumers' evaluation of the quality of this brand of cigarettes.

[0005] In our tobacco industry, this problem has not been taken seriously enough before. Even when the flip of the cigarette case is detected for opening and closing during cigarette production, due to the lack of relevant equipment, only manual detection is simply adopted, that is, the staff manually opens and closes the flip of the cigarette case multiple times, and then visually inspects to evaluate whether the cigarette case is qualified. Judging whether it is qualified completely depends on experience, and there is no standard quantifiable index, and the reliability of the detection result is poor. Summary of the Invention

[0006] The purpose of the present invention is to provide a cigarette case flip return detection device and a detection method thereof. Through the mutual cooperation of a positioning mechanism, a flipping mechanism, a clamping mechanism, a fixing mechanism and a physical property testing table, the degree of automatic flipping after the flip is opened and closed multiple times is detected, the repeatability of the detection is improved, and the detection result is supported by specific data to improve the reliability of the detection.

[0007] To achieve the above technical purpose, the technical solution adopted by the present invention is as follows:

[0008] A cigarette case flip - back position detection device, comprising a physical property test bench and a mounting frame. The physical property test bench includes a bench body, a lifting arm, a mounting arm and a pressure detection head. The physical property test bench is connected with a height measuring mechanism for monitoring the lifting height of the mounting arm. The mounting frame is installed on the bench body. A mounting plate is vertically installed on the mounting frame. A positioning mechanism for fixing the box body is installed on the mounting plate. A flipping mechanism is rotatably installed on the mounting plate. A clamping mechanism for clamping the flip - cover is installed on the flipping mechanism. A fixing mechanism for fixing the box body and the flip - cover is also installed on the mounting frame.

[0009] Further defined, the positioning mechanism includes a receiving groove slidably installed on the mounting plate. Two first support ears are installed at the lower part of the receiving groove. A first clamping rod passes through the first support ears. A first retaining ring is fixedly arranged between the two first support ears on the first clamping rod. A first compression spring is sleeved between the first retaining ring and the front - located first support ear on the first clamping rod. The outer end of the first clamping rod is fixedly installed with a first pull ring. Two first positioning holes are opened on the mounting plate. The inner end of the first clamping rod is inserted into one of the first positioning holes. With such a structural design, during use, the receiving groove is pulled until the inner end of the first clamping rod is clamped in the lower - located first positioning hole. Then the box - body part of the cigarette case is inserted into the receiving groove. Then, the inner end of the first clamping rod is pulled away from the first positioning hole through the first pull ring, and the receiving groove is pushed upward until the inner end of the first clamping rod is clamped in the upper - located first positioning hole, completing the positioning and fixing of the box body. Then the clamping mechanism can be used to clamp the flip - cover. The structure is simple and convenient to use.

[0010] Further defined, the clamping mechanism includes a support frame and two clamping plates. The support frame is rotatably installed on the mounting plate. The support frame includes a guide rod. The clamping plates are inserted at both ends of the guide rod. A stop block is fixedly installed at the free end of the guide rod. A clamping spring is sleeved between the clamping plate and the stop block on the guide rod. With such a structural design, the clamping plates are inwardly pressed under the action of the clamping spring to complete the clamping of the flip - cover. The support frame provides an installation position for the clamping plates and limits the maximum inward movement position of the clamping plates under the action of the clamping spring. The structure is simple and convenient to use.

[0011] Further defined, the support frame also includes two side frames and two connecting plates. There are two guide rods. The side frames are rotatably installed on the mounting plate. The free end of the side frame is fixedly connected to the guide rod. The connecting plates are installed between the two guide rods. The connecting plates are located inside the clamping plates. With such a structural design, a gap is formed between the two connecting plates and the middle parts of the two guide rods, which is convenient for the pressure detection head to extend from the gap to contact the flip - cover during measurement, making it more convenient to use.

[0012] Further defined, the flipping mechanism includes a transmission gear, a swinging member and a rotating disk. The transmission gear is fixedly installed on the clamping mechanism. The swinging member and the rotating disk are rotatably installed on the mounting plate. The swinging member includes a swinging bar and a sector gear fixedly installed on the swinging bar. The sector gear meshes with the transmission gear. A strip-shaped hole is formed in the swinging bar. A rotating shaft and a central shaft are fixedly installed on the rotating disk. The rotating shaft is parallel to and does not coincide with the central shaft. The rotating shaft penetrates through the strip-shaped hole. The rotating disk is rotatably installed on the mounting plate through the central shaft. With such a structural design, by rotating the rotating disk, the transmission gear can be driven to rotate reciprocally, thereby completing the opening and closing of the flip cover. The structure is simple. When in use, only the rotating disk needs to be continuously rotated in any direction, which is convenient to use.

[0013] Further defined, a motor is fixedly installed on the mounting plate. The power output shaft of the motor is in transmission connection with the central shaft. With such a structural design, the rotating disk is directly rotated by the motor, thereby completing the opening and closing of the flip cover, and the operation is simple.

[0014] Further defined, the fixing mechanism includes two fixing frames. The two fixing frames are slidably installed on the mounting frame. Rubber clamping blocks are fixedly installed on the inner walls of the fixing frames. With such a structural design, after the opening and closing of the flip cover are completed, the clamping mechanism is loosened to clamp the flip cover, and then the two fixing frames are pushed inward. The rubber clamping blocks are used to clamp the box body and the flip cover, so that the included angle relationship between the box body and the flip cover is fixed. Then, by the lowering of the pressure detection head, the position of the flip cover is detected, which can avoid the problem of low detection accuracy caused by too small stress between the box body and the flip cover.

[0015] Further defined, push blocks are horizontally installed on the inner sides of the two fixing frames. Inclined notches are formed on both sides of the inner ends of the push blocks. Oblique blocks are integrally formed on both sides of the inner walls of the two clamping plates. With such a structural design, through the mutual cooperation of the inclined notches and the oblique blocks, before the rubber clamping blocks clamp the box body and the flip cover, the push blocks first contact the oblique blocks, and the two clamping plates are pushed outward by the push blocks, so that the clamping mechanism releases the clamping of the flip cover. By the action of pushing the fixing frames inward, the clamping mechanism first releases the clamping of the flip cover, and then the rubber clamping blocks fix the box body and the flip cover, which is more convenient to use.

[0016] The present invention also discloses a detection method for a cigarette case flip cover return position detection device, including the following steps:

[0017] 1) Take the cigarette case to be detected. After removing all the cigarettes in the cigarette case, fix the box body of the cigarette case with the flip cover in the closed state in the positioning mechanism, and then clamp the flip cover with the clamping mechanism;

[0018] 2) Place the flip cover of the cigarette case directly below the pressure detection head, and drive the mounting arm to descend uniformly through the lifting arm of the physical property testing platform, so that the pressure detection head presses on the flip cover of the cigarette case;

[0019] 3) The pressure detection head continues to descend, squeezing the flip cover of the cigarette case, and record the downward pressing distance A of the mounting arm when the pressure detection head detects pressure;

[0020] 4) After the recording is completed, drive the pressure detection head to reset through the lifting arm;

[0021] 5) Start the flipping mechanism, use the flipping mechanism to flip the clamping mechanism, and then drive the flip cover to open and close repeatedly relative to the box body;

[0022] 6) After the flip cover opens and closes relative to the box body a certain number of times, cover the flip cover back on the box body again, then release the clamping of the flip cover by the clamping mechanism, and then clamp the cigarette case and the flip cover through the fixing mechanism;

[0023] 7) Drive the mounting arm to descend uniformly through the lifting arm of the physical property testing platform, so that the pressure detection head presses on the flip cover of the cigarette case again;

[0024] 8) The pressure detection head continues to descend, squeezing the flip cover of the cigarette case, and record the downward pressing distance B of the mounting arm when the pressure detection head detects pressure;

[0025] 9) Compare the downward pressing distance A and the downward pressing distance B. The height difference between the downward pressing distance A and the downward pressing distance B is the automatic springing amount of the flip cover of the cigarette case relative to the box body after being opened and closed a set number of times. Through this form of data, the automatic springing amount of the flip cover of the cigarette case relative to the box body after being opened and closed a set number of times can be judged. If the height difference is within the error range, it is judged as qualified, otherwise it is judged as unqualified.

[0026] The invention adopting the above technical solution has the following advantages:

[0027] 1. Through the mutual cooperation of the positioning mechanism, the flipping mechanism, the clamping mechanism, the fixing mechanism and the physical property testing platform, the automatic flipping degree of the flip cover after multiple opening and closing operations is detected, the repeatability of the detection is improved, and the detection structure is supported by specific data, thereby improving the reliability of the detection;

[0028] 2. Clamp the box body and the flip cover through the fixing mechanism, fix the included angle relationship between the box body and the flip cover, and then detect the position of the flip cover by the descent of the pressure detection head, which can avoid the problem of low detection accuracy caused by too small stress between the box body and the flip cover;

[0029] 3. The clamping plate is inwardly pressed under the action of the clamping spring to complete the clamping of the flip cover. The support frame provides an installation position for the clamping plate and limits the maximum inward movement position of the clamping plate under the action of the clamping spring. The structure is simple and easy to use.

[0030] 4. By rotating the rotating disk, the transmission gear can be driven to rotate reciprocally, thereby completing the opening and closing of the flip cover. The structure is simple. When in use, only need to continuously rotate the rotating disk in any direction, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention can be further illustrated by the non-limiting embodiments given in the drawings;

[0032] Figure 1 It is a schematic structural diagram of an embodiment of a cigarette case flip cover return position detection device and its detection method of the present invention;

[0033] Figure 2 It is a schematic structural diagram of the mounting frame and its attached components in an embodiment of a cigarette case flip cover return position detection device and its detection method of the present invention Figure 1 ;

[0034] Figure 3 It is Figure 2 an enlarged structural diagram of part A in

[0035] Figure 4 It is a schematic structural diagram of part of the mounting frame in an embodiment of a cigarette case flip cover return position detection device and its detection method of the present invention;

[0036] Figure 5 It is a schematic structural diagram of the clamping mechanism part in an embodiment of a cigarette case flip cover return position detection device and its detection method of the present invention;

[0037] Figure 6 It is a schematic structural diagram of the mounting frame and its attached components in an embodiment of a cigarette case flip cover return position detection device and its detection method of the present invention Figure 2 ;

[0038] Figure 7 It is Figure 6 an enlarged structural diagram of part B in

[0039] Figure 8 It is a schematic structural diagram of the mounting frame and its attached components in an embodiment of a cigarette case flip cover return position detection device and its detection method of the present invention Figure 3 ;

[0040] Figure 9 It is a schematic structural diagram of an embodiment of a cigarette case flip cover return position detection device and its detection method of the present invention Figure 2 ;

[0041] Figure 10 is Figure 9 the enlarged structural schematic diagram at position C in

[0042] The main component symbols are explained as follows:

[0043] Physical property test bench 1, box body 101, flip cover 102, bench body 11, lifting arm 12, mounting arm 13, pressure detection head 14,

[0044] Mounting frame 2, mounting plate 21, receiving groove 22, first ear 221, first clamping rod 222, first retaining ring 223, first compression spring 224, first pull ring 226, first positioning hole 227,

[0045] Positioning mechanism, flipping mechanism, clamping mechanism, fixing mechanism,

[0046] Support frame 3, guide rod 301, side frame 302, connecting plate 303, clamping plate 31, stopper 311, clamping spring 312, transmission gear 41, motor 42, swing bar 431, strip hole 4310, sector gear 432, rotating disk 44, rotating shaft 440, central shaft 45,

[0047] Fixing frame 5, rubber clamping block 51, push block 52, notch 520, inclined block 53. Specific embodiments

[0048] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that in the description of the drawings or the specification, similar or identical parts are denoted by the same reference numerals. The implementation manners not depicted or described in the drawings are those known to those of ordinary skill in the art. Additionally, the directional terms mentioned in the embodiments, such as "up", "down", "top", "bottom", "left", "right", "front", "rear", etc., are only references to the directions in the drawings and are not used to limit the protection scope of the present invention.

[0049] As Figures 1 to 10 shown, a cigarette case flip cover return detection device of the present invention includes a physical property test bench 1 and a mounting frame 2. The physical property test bench 1 includes a bench body 11, a lifting arm 12, a mounting arm 13, and a pressure detection head 14. The physical property test bench 1 is connected with a height measurement mechanism for monitoring the lifting height of the mounting arm 13. The mounting frame 2 is installed on the bench body 11. A mounting plate 21 is vertically installed on the mounting frame 2. A positioning mechanism for fixing the box body 101 is installed on the mounting plate 21. A flipping mechanism is rotatably installed on the mounting plate 21. A clamping mechanism for clamping the flip cover 102 is installed on the flipping mechanism. A fixing mechanism for fixing the box body 101 and the flip cover 102 is also installed on the mounting frame 2.

[0050] As Figures 2 - 4As shown in the figure, the positioning mechanism includes a receiving groove 22 slidably mounted on the mounting plate 21. Two first support ears 221 are installed at the lower part of the receiving groove 22. A first clamping rod 222 passes through the first support ears 221. A first retaining ring 223 is fixedly arranged between the two first support ears 221 on the first clamping rod 222. A first compression spring 224 is sleeved between the first retaining ring 223 and the front first support ear 221 on the first clamping rod 222. A first pull ring 226 is fixedly installed at the outer end of the first clamping rod 222. Two first positioning holes 227 are formed on the mounting plate 21. The inner end of the first clamping rod 222 passes through one of the first positioning holes 227. During use, the receiving groove 22 is pulled until the inner end of the first clamping rod 222 is clamped in the lower first positioning hole 227. Then, the box body 101 part of the cigarette case is partially clamped into the receiving groove 22. Then, the inner end of the first clamping rod 222 is pulled away from the first positioning hole 227 through the first pull ring 226, and the receiving groove 22 is pushed upward until the inner end of the first clamping rod 222 is clamped in the upper first positioning hole 227, completing the positioning and fixing of the box body 101. Then, the clamping mechanism can be used to clamp the flip cover 102. The structure is simple and easy to use.

[0051] As Figure 5 shown in the figure, the clamping mechanism includes a support frame 3 and two clamping plates 31. The support frame 3 is rotatably mounted on the mounting plate 21. The support frame 3 includes a guide rod 301. The clamping plates 31 pass through both ends of the guide rod. A stop block 311 is fixedly installed at the free end of the guide rod. A clamping spring 312 is sleeved between the guide rod 301, the clamping plate 31, and the stop block 311. The clamping plate 31 is pressed inward under the action of the clamping spring 312 to complete the clamping of the flip cover 102. The support frame 3 provides an installation position for the clamping plate 31 and limits the maximum inward movement position of the clamping plate 31 under the action of the clamping spring 312. The structure is simple and easy to use.

[0052] As Figure 5 shown in the figure, the support frame 3 further includes two side frames 302 and two connecting plates 303. There are two guide rods 301. The side frames 302 are rotatably mounted on the mounting plate 21. The free end of the side frame 302 is fixedly connected to the guide rod 301. The connecting plate 303 is installed between the two guide rods 301. The connecting plate 303 is located inside the clamping plate 31. A gap is formed between the two connecting plates 303 and the middle parts of the two guide rods 301, which is convenient for the pressure detection head 14 to extend through the gap to contact the flip cover 102 during measurement, making it more convenient to use.

[0053] As Figure 6 and Figure 7As shown, the flipping mechanism includes a transmission gear 41, a swinging member, and a rotating disk 44. The transmission gear 41 is fixedly installed on the clamping mechanism. The swinging member and the rotating disk 44 are rotatably installed on the mounting plate 21. The swinging member includes a swinging bar 431 and a sector gear 432 fixedly installed on the swinging bar 431. The sector gear 432 meshes with the transmission gear 41. A strip-shaped hole 4310 is formed in the swinging bar 431. A rotating shaft 440 and a central shaft 45 are fixedly installed on the rotating disk 44. The rotating shaft 440 is parallel to and does not coincide with the central shaft 45. The rotating shaft 440 passes through the strip-shaped hole 4310. The rotating disk 44 is rotatably installed on the mounting plate 21 through the central shaft 45. By rotating the rotating disk 44, the transmission gear 41 can be driven to rotate reciprocally, thereby completing the opening and closing of the flip cover 102. The structure is simple. When in use, only the rotating disk 44 needs to be continuously rotated in any direction, which is convenient to use.

[0054] As Figure 6 and Figure 7 shown, a motor 42 is fixedly installed on the mounting plate 21. The power output shaft of the motor 42 is in transmission connection with the central shaft 45. The rotating disk 44 is directly rotated by the motor 42, thereby completing the opening and closing of the flip cover 102, and the operation is simple.

[0055] As Figure 9 and Figure 10 shown, the fixing mechanism includes two fixing frames 5. The two fixing frames 5 are slidably installed on the mounting frame 2. A rubber clamping block 51 is fixedly installed on the inner wall of the fixing frame 5. After the opening and closing of the flip cover 102 are completed, the clamping mechanism releases the clamping of the flip cover 102, and then the two fixing frames 5 are pushed inward. The rubber clamping block 51 is used to clamp the box body 101 and the flip cover 102, so that the included angle relationship between the box body 101 and the flip cover 102 is fixed. Then, by the lowering of the pressure detection head 14, the position of the flip cover 102 is detected, which can avoid the problem of low detection accuracy caused by too small stress between the box body 101 and the flip cover 102.

[0056] As Figure 9 and Figure 10 shown, a push block 52 is horizontally installed on the inner sides of the two fixing frames 5. Inclined notches 520 are formed on both sides of the inner end of the push block 52. Oblique blocks 53 are integrally formed on both sides of the inner walls of the two clamping plates 31. Through the mutual cooperation of the inclined notches 520 and the oblique blocks 53, before the rubber clamping block 51 clamps the box body 101 and the flip cover 102, the push block 52 first contacts the oblique block 53, and the two clamping plates 31 are pushed outward by the push block 52, so that the clamping mechanism releases the clamping of the flip cover 102. By the action of pushing the fixing frame 5 inward, the clamping mechanism first releases the clamping of the flip cover 102, and then the rubber clamping block 51 fixes the box body 101 and the flip cover 102, which is more convenient to use.

[0057] A detection method for a cigarette case flip cover return detection device includes the following steps:

[0058] 1) Take the cigarette case to be detected. After removing all the cigarettes in the cigarette case, fix the case body 101 of the cigarette case with the flip cover 102 in the closed state in the positioning mechanism, and then clamp the flip cover 102 with the clamping mechanism.

[0059] 2) Make the flip cover 102 of the cigarette case be directly below the pressure detection head 14. Drive the mounting arm 13 to descend uniformly through the lifting arm 12 of the physical property testing platform 1, so that the pressure detection head 14 presses on the flip cover 102 of the cigarette case.

[0060] 3) The pressure detection head 14 continues to descend, forming extrusion on the flip cover 102 of the cigarette case, and record the downward pressing distance A of the mounting arm 13 when the pressure detection head 14 detects pressure.

[0061] 4) After the recording is completed, drive the pressure detection head 14 to reset through the lifting arm 12.

[0062] 5) Start the flipping mechanism, use the flipping mechanism to flip the clamping mechanism, and then drive the flip cover 102 to open and close repeatedly relative to the case body 101.

[0063] 6) After the flip cover 102 opens and closes relative to the case body 101 a certain number of times, cover the flip cover 102 on the case body 101 again, then release the clamping of the flip cover 102 by the clamping mechanism, and then clamp the cigarette case 101 and the flip cover 102 through the fixing mechanism.

[0064] 7) Drive the mounting arm 13 to descend uniformly through the lifting arm 12 of the physical property testing platform 1, so that the pressure detection head 14 presses on the flip cover 102 of the cigarette case again.

[0065] 8) The pressure detection head 14 continues to descend, forming extrusion on the flip cover 102 of the cigarette case, and record the downward pressing distance B of the mounting arm 13 when the pressure detection head 14 detects pressure.

[0066] 9) Compare the downward pressing distance A and the downward pressing distance B. The height difference between the downward pressing distance A and the downward pressing distance B is the automatic spring-back amount of the flip cover 102 of the cigarette case relative to the case body 101 after being opened and closed a set number of times. Through this shape data, the automatic spring-back amount of the flip cover 102 of the cigarette case relative to the case body 101 after being opened and closed a set number of times can be judged. If the height difference is within the error range, it is judged as qualified, otherwise it is judged as unqualified.

[0067] The above has introduced in detail a cigarette case flip return detection device and its detection method provided by the present invention. The description of specific embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A cigarette case flip cover return detection device, characterized in that: It includes a physical property test bench (1) and a mounting frame (2). The physical property test bench (1) includes a bench body (11), a lifting arm (12), a mounting arm (13) and a pressure detection head (14). The physical property test bench (1) is connected with a height measuring mechanism for monitoring the lifting height of the mounting arm (13). The mounting frame (2) is mounted on the bench body (11). A mounting plate (21) is vertically mounted on the mounting frame (2). A positioning mechanism for fixing the box body (101) is mounted on the mounting plate (21). A flipping mechanism is rotatably mounted on the mounting plate (21). A clamping mechanism for clamping the flip cover (102) is mounted on the flipping mechanism. A fixing mechanism for fixing the box body (101) and the flip cover (102) is also mounted on the mounting frame (2). The pressure detection head (14) descends to form extrusion on the flip cover (102) with the box body (101) fixed in the positioning mechanism and the flip cover (102) in a closed state, and record the downward pressing distance A of the mounting arm (13) when the pressure detection head (14) detects pressure. The pressure detection head (14) descends to form extrusion on the flip cover (102) with the flip cover (102) opened and closed a certain number of times relative to the box body (101) and then re-covered on the box body (101) and the box body (101) and the flip cover (102) clamped by the fixing mechanism, and record the downward pressing distance B of the mounting arm (13) when the pressure detection head (14) detects pressure. The height difference between the downward pressing distance A and the downward pressing distance B is the automatic springing amount of the flip cover (102) of the cigarette case relative to the box body (101) after being opened and closed a set number of times.

2. The cigarette case flip return detection device according to claim 1, characterized in that: The positioning mechanism includes a receiving groove (22) slidably mounted on the mounting plate (21). Two first support ears (221) are mounted at the lower part of the receiving groove (22). A first clamping rod (222) is passed through the first support ears (221). A first retaining ring (223) is fixedly arranged between the two first support ears (221) on the first clamping rod (222). A first compression spring (224) is sleeved between the first retaining ring (223) and the front first support ear (221) on the first clamping rod (222). A first pull ring (226) is fixedly mounted at the outer end of the first clamping rod (222). Two first positioning holes (227) are formed in the mounting plate (21). The inner end of the first clamping rod (222) is inserted into one of the first positioning holes (227).

3. The cigarette case flip return detection device according to claim 1, wherein: The clamping mechanism includes a support frame (3) and two clamping plates (31). The support frame (3) is rotatably mounted on the mounting plate (21). The support frame (3) includes a guide rod (301). The clamping plates (31) are passed through both ends of the guide rod. A stop block (311) is fixedly mounted at the free end of the guide rod. A clamping spring (312) is sleeved between the guide rod (301) and the clamping plate (31) and the stop block (311).

4. The cigarette case flip return detection device according to claim 3, characterized in that: The support frame (3) further includes two side frames (302) and two connecting plates (303). There are two guiding rods (301). The side frames (302) are rotatably installed on the mounting plate (21). The free ends of the side frames (302) are fixedly connected to the guiding rods (301). The connecting plates (303) are installed between the two guiding rods (301), and the connecting plates (303) are located inside the clamping plates (31).

5. The cigarette case flip return detection device according to claim 1, characterized in that: The flipping mechanism includes a transmission gear (41), a swinging member, and a rotating disk (44). The transmission gear (41) is fixedly installed on the clamping mechanism. The swinging member and the rotating disk (44) are rotatably installed on the mounting plate (21). The swinging member includes a swinging bar (431) and a sector gear (432) fixedly installed on the swinging bar (431). The sector gear (432) meshes with the transmission gear (41). A strip-shaped hole (4310) is formed in the swinging bar (431). A rotating shaft (440) and a central shaft (45) are fixedly installed on the rotating disk (44). The rotating shaft (440) is parallel to and does not coincide with the central shaft (45). The rotating shaft (440) passes through the strip-shaped hole (4310), and the rotating disk (44) is rotatably installed on the mounting plate (21) through the central shaft (45).

6. The cigarette case flip return detection device according to claim 5, characterized in that: A motor (42) is fixedly installed on the mounting plate (21), and the power output shaft of the motor (42) is in transmission connection with the central shaft (45).

7. The cigarette case flip return detection device according to claim 3, characterized in that: The fixing mechanism includes two fixing frames (5). The two fixing frames (5) are slidably installed on the mounting frame (2), and rubber clamping blocks (51) are fixedly installed on the inner walls of the fixing frames (5).

8. The cigarette case flip return detection device according to claim 7, characterized in that: A push block (52) is horizontally installed inside the two fixing frames (5). Inclined notches (520) are formed on both sides of the inner end of the push block (52). Oblique blocks (53) are integrally formed on both sides of the inner walls of the two clamping plates (31).

9. A detection method for a cigarette case flip return detection device, characterized in that: When using the detection device described in any one of claims 1 to 8, the usage method of the detection device includes the following steps: 1) Take the cigarette case to be detected. After removing all the cigarettes in the cigarette case, fix the cigarette case body (101) with the flip cover (102) in the closed state in the positioning mechanism, and then clamp the flip cover (102) with the clamping mechanism; 2) Make the flip cover (102) of the cigarette case be directly below the pressure detection head (14). Drive the mounting arm (13) to descend uniformly through the lifting arm (12) of the physical property test bench (1) so that the pressure detection head (14) presses on the flip cover (102) of the cigarette case; 3) The pressure detection head (14) continues to descend to form extrusion on the flip cover (102) of the cigarette case, and record the downward pressing distance A of the mounting arm (13) when the pressure detection head (14) detects pressure; 4) After the recording is completed, drive the pressure detection head (14) to reset through the lifting arm (12); 5) Start the flipping mechanism, use the flipping mechanism to flip the clamping mechanism, and then drive the flip cover (102) to be repeatedly opened and closed relative to the cigarette case body (101); 6) After the flip cover (102) is opened and closed a certain number of times relative to the box body (101), cover the flip cover (102) back on the box body (101) again, then release the clamping of the flip cover (102) by the clamping mechanism, and then clamp the box body (101) and the flip cover (102) through the fixing mechanism; 7) Drive the mounting arm (13) to descend uniformly through the lifting arm (12) of the physical property test bench (1), so that the pressure detection head (14) presses on the flip cover (102) of the cigarette case again; 8) The pressure detection head (14) continues to descend, forming extrusion on the flip cover (102) of the cigarette case, and record the downward pressing distance B of the mounting arm (13) when the pressure detection head (14) detects pressure; 9) Compare the downward pressing distance A and the downward pressing distance B. The height difference between the downward pressing distance A and the downward pressing distance B is the automatic springing amount of the flip cover (102) of the cigarette case relative to the box body (101) after being opened and closed a set number of times. Through this data, the automatic springing amount of the flip cover (102) of the cigarette case relative to the box body (101) after being opened and closed a set number of times can be judged. If the height difference is within the error range, it is judged as qualified, otherwise it is judged as unqualified.

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