Pharmacy medicine box automatic labeling system

Abstract

The utility model discloses an automatic labeling system for pharmacy medicine boxes, belongs to the technical field of medicine box labeling, and solves the problem that an automatic labeling system is needed to complete labeling work so as to reduce the workload of pharmacy doctors. Comprising a labeling assembly and a conveyor belt which is arranged below the labeling assembly and can rotate, the conveyor belt has elastic deformation performance, an upward jacking assembly located under the labeling position of the labeling assembly is arranged below the conveyor belt, and the movable end of the upward jacking assembly can move upwards and abut against the conveyor belt to protrude upwards. And when the movable end of the upward jacking assembly upwards abuts against the conveying belt, the top face of the conveying belt can make contact with the labeling position of the labeling assembly. According to the utility model, the servo motor controls the conveyor belt and the label belt, and the distance sensor and the trigger circuit work cooperatively, so that the automatic process of medicine box positioning, jacking, labeling and resetting is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of medicine box labeling, in particular to an automatic medicine box labeling system for a pharmacy. Background Art

[0002] When picking up medicine at the pharmacy, labeling is a very important step to ensure that patients can use the medicine accurately and prevent errors or confusion. Modern pharmacies usually print labels automatically, automatically generate necessary label content based on the patient's prescription information, and then paste the label on the medicine box after verification by the pharmacy doctor. Manual operation often requires distinguishing the content of the label and the name on the medicine box, and then manually tearing off the label and then pasting it. At present, such labeling will bring a huge workload to the pharmacy doctors throughout the day. Even when there are a large number of patients, there will be too many medicine boxes, resulting in manual labeling errors.

[0003] Therefore, an automated labeling system is needed to complete the labeling work to reduce the workload of pharmacy doctors.

[0004] Therefore, a pharmacy medicine box automatic labeling system is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes an automatic labeling system for medicine boxes in pharmacies.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A drug box automatic labeling system in a pharmacy comprises a labeling component and a rotatable conveyor belt arranged below the labeling component, wherein the conveyor belt has elastic deformation performance, and an upper top component is arranged below the conveyor belt and is located directly below the labeling position of the labeling component, and the movable end of the upper top component can be displaced upward and abut against the upward protrusion of the conveyor belt, and when the movable end of the upper top component upwardly abuts against the conveyor belt, the top surface of the conveyor belt can contact the labeling position of the labeling component.

[0008] Preferably, it also includes two groups of frames, two driving rollers are rotatably connected between the two groups of frames, the conveyor belt is transmission-connected to the outside of the two driving rollers, two tightening rollers in contact with the bottom surface of the conveyor belt are rotatably connected between the two groups of frames, the distance between the inner bottom surface of the conveyor belt between the two tightening rollers and the inner top surface of the conveyor belt is 2-5cm, the upper top component is arranged between the two groups of frames, a servo motor is fixedly connected to one end of the frame, and the output shaft of the servo motor is coaxially transmission-connected to one of the driving rollers.

[0009] Preferably, the upper top assembly includes an electromagnet fixedly connected between two groups of frames, a plurality of guide rods, a metal spring, a base plate, two groups of bracket groups fixedly connected to the top surface of the base plate, and support roller one and support roller two rotatably connected in the bracket group. There are two through holes in the thickness direction of the electromagnet, the guide rod is arranged to pass through the through holes, the base plate is fixedly connected to the upper end of the guide rod, the metal spring is sleeved on the outside of the guide rod, and the two ends of the metal spring are respectively fixedly connected to the base plate and the electromagnet, and the spacing between support roller one and support roller two is 15-25cm.

[0010] Preferably, the labeling assembly comprises a main connecting plate, an unwinding roller rotatably connected to the main connecting plate, a convex plate fixedly connected to the main connecting plate, a primary guide roller, a secondary guide roller and a tertiary guide roller rotatably connected between the unwinding roller and the convex plate, a connecting roller group fixedly connected to the main connecting plate and located between the primary guide roller and the secondary guide roller, and a winding roller rotatably connected to the main connecting plate, the main connecting plate is fixedly connected with a primary servo motor and a secondary servo motor, the output shaft of the primary servo motor is coaxially connected to the unwinding roller, the output shaft of the secondary servo motor is coaxially connected to the winding roller, the main connecting plate is fixedly connected with a connecting rod, the connecting rod is rotatably connected with a three-stage servo motor, the output shaft of the three-stage servo motor is coaxially connected with a rotating sleeve, the rotating sleeve is coaxially fixedly connected with an upper limit roller, the outer ring of the rotating sleeve is fixedly connected with a receiving plate, the end of the receiving plate away from the rotating sleeve is fixedly connected with a lower limit roller, and the rotating sleeve is fixedly connected with a resisting plate that contacts the upper limit roller and the lower limit roller.

[0011] Preferably, the labeling assembly also includes a vertical rail fixedly connected to a side frame, a slide seat is slidably connected to the vertical rail, one end of the connecting roller group is fixedly connected to the slide seat, and the connecting roller group passes through the main connecting plate, and the end of the connecting roller group away from the slide seat is fixedly connected to a connecting plate, the top surface of the vertical rail is fixedly connected to a driving motor, the output shaft of the driving motor passes through the vertical rail, the output shaft of the driving motor is coaxially connected to a screw rod, and the screw rod is threadedly connected to the slide seat.

[0012] Preferably, it also includes a lifting circuit, which is coupled to the electromagnet, the first-level servo motor, the second-level servo motor, the third-level servo motor, and the servo motor. The lifting circuit controls the electromagnet to cut off power, the servo motor to stop working, and the first-level servo motor, the second-level servo motor, and the third-level servo motor to work according to the change of the distance between the top surface of the conveyor belt and the labeling position of the labeling assembly.

[0013] Preferably, the boost circuit comprises

[0014] A distance sensor is arranged on the bottom surface of the main connecting plate, and the distance sensor collects the distance between the distance sensor and the top surface of the conveyor belt and feeds back a distance signal;

[0015] A voltage comparison circuit, the input end of the voltage comparison circuit is coupled to the output end of a distance sensor, and the voltage comparison circuit outputs a comparison signal in response to the distance signal being less than a preset distance reference signal therein;

[0016] A power-off circuit, the power-off circuit is connected to an electromagnet and a power supply, and it controls the energization and power-off of the electromagnet;

[0017] A trigger circuit, its input end is coupled to the voltage comparison circuit, and its output end is coupled to the controlled end of the power-off circuit, a first-level servo motor, a second-level servo motor, a third-level servo motor, and the input end of the servo motor. The trigger circuit controls the power-off of the power-off circuit, controls the stop of the servo motor, and controls the operation of the first-level servo motor, the second-level servo motor, and the third-level servo motor after receiving the comparison signal.

[0018] Preferably, the voltage comparison circuit includes a voltage comparator and a digital potentiometer connected to the voltage comparator. The trigger circuit includes an integrated circuit of STM32F103RCT6 embedded microcontroller and four TB67S109AFTG motor driver chips connected to the output end. The four TB67S109AFTG motor driver chips are respectively coupled to the input ends of the first-level servo motor, the second-level servo motor, the third-level servo motor, and the servo motor. The power-off circuit includes a normally closed relay.

[0019] The utility model has the following beneficial effects:

[0020] The utility model controls a conveyor belt and a label belt through servo motors, and a distance sensor and a trigger circuit work together to realize an automated process of medicine box positioning, jacking, labeling, and resetting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0022] Figure 1 Structural schematic of the present utility model Figure 1 ;

[0023] Figure 2 For Figure 1 The enlarged view of part A in

[0024] Figure 3 Structural schematic of the present utility model Figure 2 ;

[0025] Figure 4 is Figure 3 the enlarged view at position B in

[0026] Figure 5 the structural block diagram of the boosting circuit in the present utility model.

[0027] 1. Frame; 2. Driving roller; 3. Conveyor belt; 4. Tightening roller; 5. Electromagnet; 6. Guide rod; 7. Metal spring; 8. Base plate; 9. Bracket group; 10. First supporting roller; 11. Second supporting roller; 12. Vertical rail; 13. Slide block; 14. Driving motor; 15. Connecting roller group; 16. Main connecting plate; 17. Unwinding roller; 18. First-level guiding roller; 19. Connecting disc; 20. Second-level guiding roller; 21. Convex plate; 22. Connecting rod; 23. Rotating sleeve; 24. Receiving plate; 25. Upper limiting roller; 26. Lower limiting roller; 27. Resisting plate; 28. Third-level guiding roller; 29. Winding roller; 30. Distance sensor; 31. Voltage comparison circuit; 32. Trigger circuit; 33. Power-off circuit. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the protection scope of the present utility model.

[0030] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present utility model, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.

[0032] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] An automatic labeling system for drug boxes in pharmacies, such as Figures 1 - 3 As shown, it includes two sets of frames 1, a labeling component, and a rotatable conveyor belt 3 arranged below the labeling component. The conveyor belt 3 has elastic deformation performance. An upper top component is arranged below the conveyor belt 3 and is located directly below the labeling position of the labeling component. The movable end of the upper top component can be displaced upward and abut against the upward protrusion of the conveyor belt 3. When the movable end of the upper top component upwardly abuts against the conveyor belt 3, the top surface of the conveyor belt 3 can contact the labeling position of the labeling component.

[0035] Two driving rollers 2 are rotatably connected between the two sets of frames 1, and the conveyor belt 3 is transmission-connected to the outside of the two driving rollers 2. Two tightening rollers 4 that are in contact with the bottom surface of the conveyor belt 3 are rotatably connected between the two sets of frames 1. The distance between the inner bottom surface of the conveyor belt 3 between the two tightening rollers 4 and the inner top surface of the conveyor belt 3 is 2-5cm. The upper top component is arranged between the two sets of frames 1. A servo motor is fixedly connected to one end of the frame 1, and the output shaft of the servo motor is coaxially transmission-connected to one of the driving rollers 2.

[0036] The upper top assembly includes an electromagnet 5 fixedly connected between two sets of racks 1, several guide rods 6, a metal spring 7, a bottom plate 8, two sets of bracket groups 9 fixedly connected to the top surface of the bottom plate 8, and a first support roller 10 and a second support roller 11 rotatably connected within the bracket groups 9. There are two through holes in the thickness direction of the electromagnet 5, and the guide rods 6 are arranged through the through holes. The bottom plate 8 is fixedly connected to the upper ends of the guide rods 6. The metal spring 7 is sleeved outside the guide rods 6, and the two ends of the metal spring 7 are respectively fixedly connected to the bottom plate 8 and the electromagnet 5. The distance between the first support roller 10 and the second support roller 11 is 15 - 25 cm.

[0037] The labeling assembly includes a vertical rail 12 fixedly connected to one side of the rack 1, a sliding seat 13 slidably connected to the vertical rail 12, a main connecting plate 16, an unwinding roller 17 rotatably connected to the main connecting plate 16, a convex plate 21 fixedly connected to the main connecting plate 16, a first guiding roller 18, a second guiding roller 20 and a third guiding roller 28 rotatably connected between the unwinding roller 17 and the convex plate 21, a connecting roller group 15 fixedly connected to the main connecting plate 16 and located between the first guiding roller 18 and the second guiding roller 20, and a winding roller 29 rotatably connected to the main connecting plate 16. A first servo motor and a second servo motor are fixedly connected to the main connecting plate 16. The output shaft of the first servo motor is coaxially drivingly connected to the unwinding roller 17, and the output shaft of the second servo motor is coaxially drivingly connected to the winding roller 29. The main connecting plate 16 is fixedly connected with a connecting rod 22. A third servo motor is rotatably connected to the connecting rod 22. The output shaft of the third servo motor is coaxially drivingly connected with a rotating sleeve 23. The rotating sleeve 23 is coaxially fixedly connected with an upper limiting roller 25. A receiving plate 24 is fixedly connected to the outer ring of the rotating sleeve 23. One end of the receiving plate 24 away from the rotating sleeve 23 is fixedly connected with a lower limiting roller 26. A resisting plate 27 in contact with the upper limiting roller 25 and the lower limiting roller 26 is fixedly connected to the rotating sleeve 23. One end of the connecting roller group 15 is fixedly connected to the sliding seat 13, and the connecting roller group 15 is arranged through the main connecting plate 16. The end of the connecting roller group 15 away from the sliding seat 13 is fixedly connected with a connecting disk 19. A driving motor 14 is fixedly connected to the top surface of the vertical rail 12. The output shaft of the driving motor 14 penetrates into the vertical rail 12, and the output shaft of the driving motor 14 is coaxially drivingly connected with a lead screw, and the lead screw is threadedly connected to the sliding seat 13.

[0038] As Figure 4 shown, it further includes a lifting circuit, which is coupled to the electromagnet 5, the first servo motor, the second servo motor, the third servo motor, and the servo motor. The lifting circuit controls the power-off of the electromagnet 5, the stop of the servo motor, and the operation of the first servo motor, the second servo motor, and the third servo motor according to the change in the distance between the top surface of the conveyor belt 3 and the labeling position of the labeling assembly.

[0039] As Figure 5As shown, the lifting circuit includes a distance sensor 30, a voltage comparison circuit 31, a power-off circuit 33, and a trigger circuit 32. The voltage comparison circuit 31 includes a voltage comparator and a digital potentiometer connected to the voltage comparator. The trigger circuit 32 includes an integrated circuit of STM32F103RCT6 embedded microcontroller and four TB67S109AFTG motor driver chips connected to the output end. The four TB67S109AFTG motor driver chips are respectively coupled to the input ends of a first-level servo motor, a second-level servo motor, a third-level servo motor, and a servo motor. The power-off circuit 33 includes a normally closed relay.

[0040] The distance sensor 30 is arranged on the bottom surface of the main connection board 16. The distance sensor 30 collects the distance between it and the top surface of the conveyor belt 3 and feeds back a distance signal. The input end of the voltage comparison circuit 31 is coupled to the output end of the distance sensor 30. The voltage comparison circuit 31 outputs a comparison signal in response to the distance signal being less than a preset distance reference signal therein. The power-off circuit 33 is connected to the electromagnet 5 and the power supply, and controls the power-on and power-off of the electromagnet 5. The input end of the trigger circuit 32 is coupled to the voltage comparison circuit 31, and its output end is coupled to the controlled end of the power-off circuit 33, the input ends of the first-level servo motor, the second-level servo motor, the third-level servo motor, and the servo motor. After receiving the comparison signal, the trigger circuit 32 controls the power-off circuit 33 to cut off the power, controls the servo motor to stop, and controls the first-level servo motor, the second-level servo motor, and the third-level servo motor to work.

[0041] Before the practical operation of the present utility model, the lead screw is driven to rotate by the forward and reverse rotation of the driving motor 14. When the lead screw rotates, it attempts to drive the sliding seat 13 to rotate together. However, the sliding seat 13 is restricted by the vertical rail 12, so the sliding rail cannot rotate and can only displace in the height direction of the vertical rail 12 to complete the height adjustment of the labeling assembly. At this time, the resistance value of the digital potentiometer is adjusted to adjust the voltage value of the distance reference signal of the voltage comparison circuit 31. Then, the driving roller 2 is driven to rotate by the servo motor, and then the conveyor belt 3 drives the medicine box to displace. When the medicine box displaces to directly below the distance sensor 30, the distance sensor 30 feeds back a distance signal. After the voltage comparison circuit 31 compares that the distance signal is less than the distance reference signal, it outputs a comparison signal to the trigger circuit 32. The trigger circuit 32 can also respond to this comparison signal, and then controls the power-off circuit 33 of the normally closed relay to power off, so that the electromagnet 5 is powered off, and can also control the servo motor to stop working, so that the position of the medicine box will not change. After the electromagnet 5 is powered off, the metal spring 7 is no longer magnetically adsorbed, so it expands and pushes the bottom plate 8 to displace upward. The displacement of the bottom plate 8 will drive the support frame group, the first support roller 10 and the second support roller 11 to displace upward, so that a part of the conveyor belt 3 can bulge upward, thus completing the jacking of the medicine box and making the top surface of the medicine box touch the bottom surface of the convex plate 21. At this time, the first-level servo motor, the second-level servo motor, and the third-level servo motor start to work under the control of the trigger circuit 32, so that the unwinding roller 17 unwinds and the winding roller 29 winds, so that the label tape can pass through a series of guides and pass through the convex plate 21. When passing through the convex plate 21, the label will separate from the label tape, and at this time, the label is located above the medicine box. By the back-and-forth swing of the pressing plate 27, the pressing plate 27 can press the label to fit on the top surface of the medicine box. Then, the trigger circuit 32 will reset this process, the power-off circuit 33 is powered on again, the electromagnet 5 is attracted, so that the top jacking assembly can fall, and the medicine box also returns to its original position with the conveyor belt 3. The first-level servo motor, the second-level servo motor, and the third-level servo motor stop working, and the servo motor continues to drive the driving roller 2 to rotate, so that the next group of medicine boxes can repeat the above actions, and then complete the automatic labeling action.

[0042] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An automatic labeling system for medicine boxes in a pharmacy, characterized in that: The invention comprises a labeling component and a rotatable conveyor belt (3) arranged below the labeling component, wherein the conveyor belt (3) has elastic deformation performance, and an upper top component is arranged below the conveyor belt (3) and is located directly below the labeling position of the labeling component, wherein the movable end of the upper top component can move upward and abut against the conveyor belt (3) to protrude upward, and when the movable end of the upper top component abuts against the conveyor belt (3) upward, the top surface of the conveyor belt (3) can contact the labeling position of the labeling component.

2. The automatic labeling system for medicine boxes in pharmacies according to claim 1, characterized in that: The invention also comprises two sets of frames (1), two driving rollers (2) are rotatably connected between the two sets of frames (1), the conveyor belt (3) is drivingly connected to the outside of the two driving rollers (2), two take-up rollers (4) are rotatably connected between the two sets of frames (1) and are in contact with the bottom surface of the conveyor belt (3), the distance between the inner bottom surface of the conveyor belt (3) located between the two take-up rollers (4) and the inner top surface of the conveyor belt (3) is 2-5 cm, the upper top assembly is arranged between the two sets of frames (1), one end of the frame (1) is fixedly connected to a servo motor, and the output shaft of the servo motor is coaxially drivingly connected to one of the driving rollers (2).

3. The automatic labeling system for drug boxes in pharmacies according to claim 2, characterized in that: The upper top assembly comprises an electromagnet (5) fixedly connected between two sets of frames (1), a plurality of guide rods (6), a metal spring (7), a bottom plate (8), two sets of bracket groups (9) fixedly connected to the top surface of the bottom plate (8), and a first support roller (10) and a second support roller (11) rotatably connected to the bracket group (9); the electromagnet (5) has two through holes in the thickness direction, the guide rod (6) is arranged to pass through the through holes, the bottom plate (8) is fixedly connected to the upper end of the guide rod (6), the metal spring (7) is sleeved on the outer side of the guide rod (6), and the two ends of the metal spring (7) are respectively fixedly connected to the bottom plate (8) and the electromagnet (5), and the spacing between the first support roller (10) and the second support roller (11) is 15-25 cm.

4. The automatic labeling system for drug boxes in pharmacies according to claim 3, characterized in that: The labeling assembly comprises a main connecting plate (16), an unwinding roller (17) rotatably connected to the main connecting plate (16), a convex plate (21) fixedly connected to the main connecting plate (16), a primary guide roller (18), a secondary guide roller (20) and a tertiary guide roller (28) rotatably connected between the unwinding roller (17) and the convex plate (21), a connecting roller group (15) fixedly connected to the main connecting plate (16) and located between the primary guide roller (18) and the secondary guide roller (20), and a winding roller (29) rotatably connected to the main connecting plate (16), wherein a primary servo motor and a secondary servo motor are fixedly connected to the main connecting plate (16), and an output shaft of the primary servo motor is connected to the unwinding roller. (17) coaxial transmission connection, the output shaft of the secondary servo motor is coaxially connected to the winding roller (29), the main connecting plate (16) is fixedly connected to a connecting rod (22), the connecting rod (22) is rotatably connected to a three-stage servo motor, the output shaft of the three-stage servo motor is coaxially connected to a rotating sleeve (23), the rotating sleeve (23) is coaxially fixedly connected to an upper limit roller (25), the outer ring of the rotating sleeve (23) is fixedly connected to a receiving plate (24), the receiving plate (24) is fixedly connected to a lower limit roller (26) at one end away from the rotating sleeve (23), and the rotating sleeve (23) is fixedly connected to a resisting plate (27) that contacts the upper limit roller (25) and the lower limit roller (26).

5. The automatic labeling system for drug boxes in pharmacies according to claim 4, characterized in that: The labeling assembly further comprises a vertical rail (12) fixedly connected to a side frame (1); a slide seat (13) is slidably connected to the vertical rail (12); one end of the connecting roller group (15) is fixedly connected to the slide seat (13); the connecting roller group (15) passes through the main connecting plate (16); one end of the connecting roller group (15) away from the slide seat (13) is fixedly connected to a connecting plate (19); a top surface of the vertical rail (12) is fixedly connected to a driving motor (14); an output shaft of the driving motor (14) passes through the vertical rail (12); the output shaft of the driving motor (14) is coaxially connected to a lead screw; and the lead screw is threadedly connected to the slide seat (13).

6. The automatic labeling system for drug boxes in pharmacies according to claim 4, characterized in that: It also includes a lifting circuit, which is coupled to the electromagnet (5), the first-level servo motor, the second-level servo motor, the third-level servo motor, and the servo motor. The lifting circuit controls the electromagnet (5) to cut off power, the servo motor to stop working, and the first-level servo motor, the second-level servo motor, and the third-level servo motor to work according to the change of the distance between the top surface of the conveyor belt (3) and the labeling location of the labeling component.

7. The automatic labeling system for drug boxes in pharmacies according to claim 6, characterized in that: The boost circuit comprises: A distance sensor (30), the distance sensor (30) being arranged on the bottom surface of the main connecting plate (16), the distance sensor (30) collecting the distance between the distance sensor (30) and the top surface of the conveyor belt (3) and feeding back a distance signal; A voltage comparison circuit (31), wherein an input end of the voltage comparison circuit (31) is coupled to an output end of the distance sensor (30), and the voltage comparison circuit (31) outputs a comparison signal in response to the distance signal being smaller than a preset distance reference signal; A power-off circuit (33), the power-off circuit (33) connecting the electromagnet (5) and a power source, and controlling the electromagnet (5) to be powered on or off; A trigger circuit (32) has an input end coupled to a voltage comparison circuit (31), and an output end coupled to a controlled end of a power-off circuit (33), a primary servo motor, a secondary servo motor, a tertiary servo motor, and an input end of the servo motor; after receiving a comparison signal, the trigger circuit (32) controls the power-off circuit (33) to power off, controls the servo motor to stop, and controls the primary servo motor, the secondary servo motor, and the tertiary servo motor to operate.

8. The automatic labeling system for drug boxes in pharmacies according to claim 7, characterized in that: The voltage comparison circuit (31) comprises a voltage comparator and a digital potentiometer connected to the voltage comparator; the trigger circuit (32) comprises an integrated circuit of an STM32F103RCT6 embedded-microcontroller and four TB67S109AFTG motor driver chips connected to the output end; the four TB67S109AFTG motor driver chips are respectively coupled to a primary servo motor, a secondary servo motor, a tertiary servo motor, and an input end of the servo motor; and the power-off circuit (33) comprises a normally closed relay.

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