Chocolate 3D printing device

Abstract

20 26 20 54 84 09 J ul 2 02 6 A B S T R A C T 2 0 2 6 2 0 5 4 8 4 0 9 J u l 2 0 2 6 A B S T R A C T 2 0 2 6 2 0 5 4 8 4 0 9 J u l 2 0 2 6

Description

TECHNICAL FIELD The disclosure relates to the field of food custom processing apparatus, in particular to a chocolate 3D printing device. 5 BACKGROUND ART Chocolate is currently a commonly used food. There are various shapes of chocolate at present, but almost all of chocolates currently are produced by factories and then sold by supermarkets. Although this mode of unified production by factories and then selling by 10 supermarkets ensures product quality, the shapes of chocolate cannot meet personalized needs of consumers because it is produced by the factories in a unified manner. In order to meet the personalized needs of the consumers, a chocolate molding device which can print and mold chocolate as desired is disclosed in the patent publication No. CN110973322A. In this molding device, raw materials are transported between a cartridge for 15 storing granular raw materials and a print head through a U-shaped pipeline, the raw materials themselves are easily stuck in a process of transporting the raw materials by using the U-shaped pipeline, and thus the molding device shown in this structure has relatively poor reliability in chocolate molding. In addition, existing commercial chocolate 3D printing apparatuses still has obvious 20 defects in practical applications. First, there is no adaptable holding structure at a discharge end of the apparatus, and there is no stable holding area for printed chocolate finished products, packaging materials and auxiliary tools, which is inconvenient to use in a self-service picking scene. Secondly, the apparatus has no matching residue collection structure, and chocolate chips generated in a printing process are easy to scatter to a printing area and a surface of the apparatus, 25 thus polluting the finished products and interior of the apparatus, and it is difficult to ensure food hygiene. Thirdly, a few apparatuses adopt a fixed structure for a holding platform, occupying extra space, which is not conducive to a moving, handling and miniaturization commercial deployment of the apparatus, with poor scene adaptability. Therefore, there is a need for a chocolate 3D printing device. 2026205484   09 Jul 2026 SUMMARY In view of above problems, a chocolate 3D printing device is proposed in the disclosure, in which materials in a cartridge directly enter a nozzle for printing and molding, and there is 5 no complicated conveying pipeline between the cartridge and the nozzle, thus with low probability that the materials are stuck in a printing process and with relatively more reliable operations in a chocolate 3D printing and molding process. Technical schemes adopted in the disclosure are as follows. A chocolate 3D printing device includes a cabinet, a cartridge and a nozzle. A first 10 accommodating cavity is provided in the cabinet, a crossbar is provided in the first accommodating cavity, the cartridge is slidably installed on the crossbar, the nozzle is arranged at an end of the cartridge, and the nozzle is communicated with the cartridge; a conveying belt is rotatably installed in the first accommodating cavity through a pulley, the conveying belt passes through the cartridge, and both ends of the conveying belt are respectively connected 15 and fixed with the cartridge; and a transverse movable motor is provided in the cabinet, the transverse movable motor is matched with the pulley, and a control host is provided in the cabinet, and the transverse movable motor and the nozzle are both electrically connected with the control host. A printing process of the present printing device is as follows: firstly, the nozzle is directly 20 arranged at the end of the cartridge, and the materials in the cartridge directly enter the nozzle for printing and molding, and there is no complicated conveying pipeline between the cartridge and the nozzle, thus with low probability that the materials are stuck in a printing process, and the whole device is with relatively more reliable operations in a chocolate 3D printing and molding process. 25        In the present printing device, the cartridge can slide on the crossbar, and when the cartridge slides on the crossbar, printing and molding at different angles and positions can be realized. Meanwhile, in the present printing device, because the conveying belt and the cartridge are fixed together, the cartridge can be driven to move back and forth on the crossbar when the conveying belt is driven by the transverse movable motor. 2026205484   09 Jul 2026 In the present printing device, the control host controls operations of the nozzle and the transverse movable motor through a built-in program, so as to print different forms of chocolate. Optionally, the chocolate 3D printing device further includes a bearing table, which is arranged at a bottom of the first accommodating cavity, a bearing plate is slidably arranged on 5 the bearing table, and a mobile dispensing mechanism is provided inside the bearing table and matched with the bearing plate, and the mobile dispensing mechanism is matched with the control host. Specifically, operations of the mobile dispensing mechanism is controlled by the control host. When the mobile dispensing mechanism operates, it can drive the bearing plate to move 10 on the bearing table. After chocolate printing is finished, the bearing plate can be pushed out of the first accommodating cavity by the mobile dispensing mechanism, thus facilitating users to take chocolate on the bearing plate. The mobile dispensing mechanism includes a bottom guide rod, a dispensing motor, a dispensing belt and a dispensing guide slider. The bottom guide rod is arranged within the 15 bearing table, the dispensing belt is rotatably installed within the bearing table through the pulley, the dispensing guide slider is arranged on the bottom guide rod, the bearing plate is fixed to the dispensing guide slider, the dispensing belt is fixed with an end of the bearing plate, and the dispensing motor is matched with one of the pulleyson the dispensing belt. The dispensing motor is electrically connected with the control host. 20        Operations of the dispensing motor in this mechanism is controlled by the control host, the dispensing motor operates to drive the dispensing belt to rotate, and the dispensing belt rotates to drive the bearing plate to enter and exit the first accommodating cavity, while the bottom guide rod and the dispensing guide slider serve to guide movement of the bearing plate, so as to prevent the bearing plate from deviating and sticking in moving. There are two bottom guide 25 rods, both of which are provided with the dispensing guide slider, and the bearing plate is fixed with the dispensing guide blocks on the two bottom guide rods. Optionally, the chocolate 3D printing device further includes two lifting belts, which are each rotatably installed on the cabinet through a pulley, and the two lifting belts are respectively located on two sides of the first accommodating cavity, and a linkage rod is arranged between 2026205484   09 Jul 2026 the two lifting belts, a door plate is slidably provided at a cavity opening of the first accommodating cavity, and the door plate is matched with the lifting belts, and a lifting motor is arranged in the cabinet, and the lifting motor is matched with the pulley. Specifically, the door plate is made of transparent material, including but not limited to a 5 door plate made of transparent acrylic material. When the lifting motor operates, it can drive the lifting belt to rotate, and the lifting belt can rotate to drive the door plate to lift. When the door plate does not completely block the first accommodating cavity, the mobile dispensing mechanism can push the bearing plate out of the bearing table. After the mobile dispensing mechanism retracts the bearing plate into the first accommodating cavity, the lifting motor can 10 operate so that the door plate completely blocks the first accommodating cavity. Optionally, the cabinet is provided with an operation display screen which is electrically connected with the control host. The operation display screen serves to facilitate users to select different built-in programs to run through the operation display screen, so as to print out different forms of chocolate. 15        Optionally, the cabinet is provided with a coin-feeding component, a banknote reception component and a card-reading component, and the coin-feeding component, the banknote reception component and the card-reading component are all electrically connected with the control host. The coin-feeding component is configured to receive coins, the banknote reception 20 component is configured to receive banknote, while the card-reading component is configured to facilitate users to swipe their cards. Optionally, the cabinet is provided with a voice broadcasting component which is electrically connected with the control host. The voice broadcasting component serves to broadcast voice information. 25        Optionally, the cabinet is provided with a display cavity, a display plate is provided in the display cavity, and a transparent cover plate is provided at an opening of the display cavity. Optionally, a plurality of universal wheels are provided at a bottom of the cabinet. The universal wheels are provided to facilitate the cabinet to be moved to a required position. 2026205484   09 Jul 2026 Optionally, the chocolate 3D printing device further includes two vertical rods and mounting blocks. The two vertical rods are arranged on the cabinet, and each of the two vertical rods is provided with a mounting block in a sliding way. Two ends of the crossbar are respectively matched with the two mounting blocks, the conveying belt is rotatably matched 5 with a pulley on the mounting block; a lead screw mechanism is provided in the cabinet, and a slider of the lead screw mechanism is directly or indirectly fixed with the mounting block, and the crossbar and the conveying belt are in a parallel and non-contact state. A reason why the crossbar is not in contact with the conveying belt is to ensure that the cartridge can move stably on the crossbar. In the above structure, because the mounting block 10 can slide on the vertical rod, the slider may slide up and down when the lead screw mechanism operates, and sliding up and down of the slider can drive the mounting block to slide up and down along the vertical rod, so as to realize lifting of the crossbar and the conveying belt, which can realize lifting of the nozzle and the cartridge, thus better meeting requirements of chocolate printing. The transverse moving motor in cooperative linkage with the pulley on the conveying 15 belt is also arranged on the mounting block. Furthermore, a holding mechanism is fixed at a right side of the cabinet, the holding mechanism includes a fixed frame, a rotating shaft is rotatably connected inside the fixed frame, a first shelf is fixed on an outer surface of the rotating shaft, a through groove is defined in the first shelf, a slideway is defined on each of internal front and rear surfaces of the through groove, 20 a sliding rod is movably connected jointly inside two slideways, a connecting frame is fixed on an outer surface of the sliding rod, a second shelf is fixed at a top end of the connecting frame, and a worm wheel is fixed both in front of and behind the first shelf on the outer surface of the rotating shaft. A bracket is fixed on each of front and rear surfaces of the first shelf, and a worm is rotatably connected to a left side of the bracket, the worm is meshed with the worm wheel 25 below. An internally threaded cylinder is fixed to a right side of the bracket, an externally threaded cylinder is threadedly connected to a right inner side of the internally threaded cylinder, a right end of the worm penetrates into the internally threaded cylinder and is fixed with a rectangular rod, a right end of the rectangular rod is slidably connected inside the externally threaded cylinder, an external surface of the externally threaded cylinder is threadedly 2026205484   09 Jul 2026 connected with a slider, and a side of the slider proximate to the second shelf is slidably connected with a guide rail. A press block is fixed below both the front and rear surfaces of the first shelf, a waste bin is fixed at a bottom of the fixed frame, two rotating rods are rotatably connected inside the 5 waste bin, a waste bucket is fixed on an outer surface of each of the rotating rods, a right end of the waste bucket penetrates to a right side of the waste bin and is fixed with the waste bucket. An outer surface of the waste bucket is meshed with a rack, and a fixed plate is slidably connected with an interior of the rack. Both fixed plates are fixedly connected with the waste bin, and the fixed plate and the interior of the rack are jointly connected with a spring. 10        A top end of the rack is attached to a lower surface of the press block. An upper part of a right end of the first shelf and a left end of the second shelf are both in an inclined-surface-shaped structure, the right end of the first shelf is attached to the left end of the second shelf, and an upper surface of the right end of the first shelf is attached to a lower surface of the second shelf. 15        Both front and rear surfaces of the fixed frame are integrally formed with a mounting plate, and the holding mechanism is detachably connected with the cabinet through the mounting plates and bolts. The disclosure has beneficial effects that materials in the cartridge directly enter a nozzle for printing and molding, and there is no complicated conveying pipeline between the cartridge 20 and the nozzle, thus with low probability that the materials are stuck in a printing process and with relatively more reliable operations in a chocolate 3D printing and molding process. Meanwhile, the holding mechanism of the disclosure is unfolded to form a flat and stable bearing surface in discharging after printing is completed, which facilitates placement of chocolate finished products, packaging materials and operating tools, and perfectly meets 25 requirements of self-service selling and picking, and when idle, the holding mechanism can be folded and stored without occupying extra space, which is suitable for design target of mobility and miniaturization of the device. The holding mechanism is linked with the waste bucket, and the waste bucket opens to receive residue synchronously when the holding mechanism is unfolded, and automatically closes collected residue when the holding mechanism is folded, 2026205484   09 Jul 2026 thus effectively preventing chocolate residue from polluting the printing area and finished products, and ensuring a food-grade clean environment. Moreover, the holding mechanism is detachably installed, which is convenient to disassemble and assemble and is suitable for devices of different specifications, thereby greatly improve commercial practicability, neatness 5 and scene adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly explain technical schemes in embodiments of the present disclosure or in related art, the drawings needed in the embodiments will be briefly introduced 10 below. Obviously, the drawings in the following description are only some of the embodiments recorded in the present disclosure, and other drawings can be obtained according to these drawings for those of ordinary skilled in the art. FIG. 1 is a schematic view of a structure of the present disclosure; FIG. 2 is a schematic view of a positional relationship of an internal structure of a cabinet 15   according to the present disclosure; FIG. 3 is an enlarged schematic view at A in FIG. 2 of the disclosure; FIG. 4 is an enlarged schematic view at B in FIG. 2 of the disclosure; FIG. 5 is an enlarged schematic view at C in FIG. 2 of the disclosure; FIG. 6 is a schematic view of a positional relationship between a vertical rod and a 20   mounting block; FIG. 7 is a schematic right view of the present disclosure; FIG. 8 is a schematic structural view of a holding mechanism according to the present disclosure; FIG. 9 is a schematic right sectional view of a holding mechanism according to the present 25 disclosure; FIG. 10 is a schematic structural view of a first shelf and a second shelf according to the present disclosure; FIG. 11 is a schematic sectional view of FIG. 10 according to the present disclosure; 2026205484   09 Jul 2026 FIG. 12 is a schematic sectional view of an internally threaded cylinder and a slider according to the present disclosure; FIG. 13 is a structural schematic view of a fixed frame and a mounting plate according to the present disclosure; 5        FIG. 14 is a schematic structural view of a second shelf according to the present disclosure; FIG. 15 is a schematic view of cooperation between a cartridge and a conveying belt along a back direction of FIG. 4; FIG. 16 is a schematic view of cooperation between a bearing plate and a cross plate; and FIG. 17 is a schematic view of cooperation between a dispensing belt and a cross plate. 10        Reference numbers in the figures are as follows: 1. Voice Broadcasting Component; 2. Door Plate; 201. Strip Brush; 3. Cabinet; 4. Coin-feeding Component; 5. Card-reading Component; 6. Operation Display Screen; 7. Banknote Reception Component; 8. Cover Plate; 9. Universal Wheel; 10. Linkage Rod; 11. First Accommodating Cavity; 12. Bearing Plate; 13. Bearing Table; 14. Display Cavity; 15. Display Plate; 16. Lifting Motor; 17. Pulley; 18. Lifting 15 Belt; 19. Crossbar; 20. Conveying Belt; 21. Cartridge; 22. Nozzle; 23. Vertical Rod; 24. Mounting Block; 25. Lead Screw Mechanism; 26. Dispensing Motor; 27. Dispensing Guide Slider; 28. Bottom Guide Rod; 29. Dispensing Belt; 30. Industrial Vision Camera; 31. Thermoelectric Cooler; 32. Holding Mechanism; 33. Fixed Frame; 34. Rotating Shaft; 35. First Shelf; 36. Through Groove; 37. Slideway; 38. Sliding Rod; 39, Connecting Frame; 40. Second 20 Shelf; 41. Worm Wheel; 42. Bracket; 43. Worm; 44. Internally threaded cylinder; 45. Externally threaded cylinder; 46. Rectangular Rod; 47. Slider; 48. Guide Rail; 49. Press Block; 50. Waste Bin; 51. Rotating Rod; 52. Waste Bucket; 53. Rack; 54. Fixed Plate; 55. Spring; 56. Discharging Port; 57. Hook; 58. Mounting Plate. 25 DETAILED DESCRIPTION In order to make above objects, features and advantages of the present disclosure more obvious and easier to understand, specific embodiments of the present disclosure will be described in detail with reference to the drawings. 2026205484   09 Jul 2026 It should be noted that the embodiments in the present disclosure and the characteristics in the embodiments can be combined mutually in the case of no conflict. In the description of the present disclosure, it should be understood that the terms "center", "upper", "lower”, "left", "right", "vertical", "horizontal", "inner" and "outer" which indicate a orientation or positional 5 relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present disclosure and simplifying the description, rather than indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus cannot be understood as a limitation on the present disclosure. In addition, the terms "first", "second" and "third" are 10 only configured for descriptive purposes and cannot be understood as indicating or implying a relative importance. Embodiment 1 As shown in FIGS. 1 to 6, a chocolate 3D printing device includes a cabinet 3, a cartridge 21 and a nozzle 22. A first accommodating cavity 11 is provided in the cabinet 3, a crossbar 19 15 is provided in the first accommodating cavity 11, the cartridge 21 is slidably installed on the crossbar 19, the nozzle 22 is arranged at an end of the cartridge 21, and the nozzle 22 is communicated with the cartridge 21; a conveying belt 20 is rotatably installed in the first accommodating cavity 11 through a pulley 17, the conveying belt 20 passes through the cartridge and is connected with the cartridge; and a transverse movable motor is provided in the 20 cabinet 3, the transverse movable motor (not visible in the field of view and not shown) is matched with the pulley 17, and a control host is provided in the cabinet 3, and the transverse movable motor and the nozzle 22 are both electrically connected with the control host. A printing process of the present printing device is as follows: firstly, the nozzle 22 is directly arranged at the end of the cartridge 21, and the materials in the cartridge 21 directly 25 enter the nozzle 22 for printing and molding, and there is no complicated conveying pipeline between the cartridge 21 and the nozzle 22, thus with low probability that the materials are stuck in a printing process, and the whole device is with relatively more reliable operations in a chocolate 3D printing and molding process. 2026205484   09 Jul 2026 In the present printing device, the cartridge 21 can slide on the crossbar 19, and when the cartridge 21 slides on the crossbar 19, printing and molding at different angles and positions can be realized. Meanwhile, in the present printing device, because the conveying belt and the cartridge 21 are connected together, the cartridge 21 can be driven to move back and forth on 5 the crossbar 19 when the conveying belt is driven by the transverse movable motor. Specifically, as shown in FIG. 15, the conveying belt passes through a channel formed between two sliders of the cartridge 21, and two ends of the conveying belt are respectively fixed with the cartridge through a threaded member, and the conveying belt drives the cartridge to move. In the present printing device, the control host (not visible in the field of view and not 10 shown) controls operations of the nozzle 22 and the transverse movable motor through a built-in program, so as to print different forms of chocolate. As shown in FIG. 4, in order to detect a printing process and a shape of printed chocolate, an industrial vision camera 30 is provided on an inner wall of the first accommodating cavity 11, and the industrial vision camera 30 is electrically connected with the control host. The 15 industrial vision camera is configured to determine whether the printed chocolate is complete or not by acquiring picture information, so as to avoid sale of unqualified products. As shown in FIGS. 1 to 6, the chocolate 3D printing device further includes a bearing table 13, which is arranged at a bottom of the first accommodating cavity 11, a bearing plate 12 is slidably arranged on the bearing table 13, and a mobile dispensing mechanism is provided 20 inside the bearing table 13 and matched with the bearing plate 12, and the mobile dispensing mechanism is matched with the control host. Specifically, operations of the mobile dispensing mechanism are controlled by the control host. When the mobile dispensing mechanism operates, it can drive the bearing plate 12 to move on the bearing table 13. After chocolate printing is finished, the bearing plate 12 can be pushed 25 out of the first accommodating cavity 11 by the mobile dispensing mechanism, thus facilitating users to take chocolate on the bearing plate 12. Referring to FIG. 6, the mobile dispensing mechanism includes a bottom guide rod 28, a dispensing motor 26, a dispensing belt 29 and a dispensing guide slider 27. The bottom guide rod 28 is arranged within the bearing table, the dispensing belt 29 is rotatably installed within 2026205484   09 Jul 2026 the bearing table through the pulley 17, the dispensing guide slider 27 is arranged on the bottom guide rod 28, the bearing plate 12 is fixed to the dispensing guide slider 27 through a cross plate 61, the dispensing belt 29 is fixed with a side of the bearing plate 12 through the cross plate 61, the cross plate 61 is connected with the dispensing belt through an adapter 62, and the 5 dispensing motor 26 is matched with one of the pulleys on the dispensing belt 29. The dispensing motor 26 is electrically connected with the control host. Referring to FIG. 5, the bearing plate 12 is made of aluminum alloy, and a thermoelectric cooler 31 is provided in the cabinet, and a cold end of the thermoelectric cooler 31 is located in the first accommodating cavity 11, and the cold end of the thermoelectric cooler 31 is 10 configured to be contacted with the bearing plate 12. When the bearing plate 12 is completely pulled back into the first accommodating cavity 11 by the dispensing belt 29, the cold end of the thermoelectric cooler 31 is contacted with an end of the bearing plate 12. When chocolate needs to be printed, the thermoelectric cooler 31 operates and the cold end of the thermoelectric cooler 31 cools the bearing plate 12, so that temperature of the bearing plate is between 15 15 degrees Celsius and 20 degrees Celsius. When the printed chocolate (with temperature of about 40 degrees Celsius to 50 degrees Celsius) contacts with the bearing plate 12 with relatively low temperature, the chocolate can be quickly solidified and molded. The thermoelectric cooler 31 is further electrically connected with the control host. Operations of the dispensing motor 26 in this mechanism is controlled by the control host, 20 the dispensing motor 26 operates to drive the dispensing belt 29 to rotate, and the dispensing belt 29 rotates to drive the bearing plate 12 to enter and exit the first accommodating cavity, while the bottom guide rod 28 and the dispensing guide slider 27 serve to guide movement of the bearing plate 12, so as to prevent the bearing plate 12 from deviating and sticking in moving. There are two bottom guide rods, both of which are provided with the dispensing guide slider, 25 and the bearing plate is fixed with the dispensing guide blocks on the two bottom guide rods. As shown in FIGS. 1 to 6, the chocolate 3D printing device further includes two lifting belts 18, which are each rotatably installed on the cabinet 3 through a pulley 17, and the two lifting belts 18 are respectively located on two sides of the first accommodating cavity 11, and a linkage rod 10 is arranged between the two lifting belts 18, a door plate 2 is slidably provided 2026205484   09 Jul 2026 at a cavity opening of the first accommodating cavity 11, and the door plate 2 is matched with the lifting belts 18, and a lifting motor 16 is arranged in the cabinet 3, and the lifting motor 16 is matched with the pulley 17. Specifically, the door plate 2 is made of transparent material, including but not limited to 5 a door plate 2 made of transparent acrylic material. When the lifting motor 16 operates, it can drive the lifting belt 18 to rotate, and the lifting belt 18 can rotate to drive the door plate 2 to lift. When the door plate 2 does not completely block the first accommodating cavity 11, the mobile dispensing mechanism can push the bearing plate 12 out of the bearing table 13. After the mobile dispensing mechanism 12 retracts the bearing plate into the first accommodating 10 cavity 11, the lifting motor 16 can operate so that the door plate 2 completely blocks the first accommodating cavity 11. As shown in FIG. 1, a strip brush 201 is provided at an end of the door plate 2, and a sum of a height of the door plate and a height of the brush is equal to a height of the first accommodating cavity. 15         Specifically, an operation method of the present device is as follows: firstly, when chocolate printing is performed, the door plate 2 and the sheet brush 201 are in a state of completely covering the cavity opening of the first accommodating cavity 11; when chocolate printing is completed, the lifting motor 16 is operated to raise the door plate 2 along with the sheet brush 201 to a certain height, and then the mobile dispensing mechanism can push the 20 bearing plate 12 and the chocolate out of the first accommodating cavity. When the bearing plate 12 is pushed out of the first accommodating cavity, the lifting motor 16 is operated reversely, and the door plate 2 moves down together with the sheet brush 201, so that the sheet brush 201 abuts against the bearing plate 12. After a customer takes the chocolate, the bearing plate 12 is pulled back into the first accommodating cavity 11 by the mobile dispensing 25 mechanism, and in a process of being pulled back into the first accommodating cavity 11, garbage and attachments on the bearing plate 12 can be swept away by the sheet brush 201, thus ensuring cleanness of the bearing plate 12. Specifically, the linkage rod 10 is rotatably installed on the cabinet 3, and two ends of the linkage rod 10 are each provided with the pulley 17. The lifting belt 18 is matched with the 2026205484   09 Jul 2026 pulley 17, and the lifting motor 16 is linked and matched with one of the pulleys 17, and the lifting motor 16 rotates to drive the pulley 17 to operate. Alternatively, the conveying belt, the lifting belt and the dispensing belt can all be toothed synchronous belts. 5        As shown in FIGS. 1 to 6, the cabinet 3 is provided with an operation display screen 6 which is electrically connected with the control host. The operation display screen 6 serves to facilitate users to select different built-in programs to run through the operation display screen 6, so as to print out different forms of chocolate. As shown in FIGS. 1 to 6, the cabinet 3 is provided with a coin-feeding component 4, a 10 banknote reception component and a card-reading component 5, and the coin-feeding component 4, the banknote reception component and the card-reading component 5 are all electrically connected with the control host. The coin-feeding component 4 is configured to receive coins, the banknote reception component is configured to receive banknote, while the card-reading component 5 is configured 15 to facilitate users to swipe their cards. As shown in FIGS. 1 to 6, the cabinet 3 is provided with a voice broadcasting component 1 which is electrically connected with the control host. The voice broadcasting component 1 serves to broadcast voice information. As shown in FIGS. 1 to 6, the cabinet 3 is provided with a display cavity 14, a display 20 plate 15 is provided in the display cavity 14, and a transparent cover plate 8 is provided at an opening of the display cavity 14. As shown in FIGS. 1 to 6, a plurality of universal wheels 9 is provided at a bottom of the cabinet 3. The universal wheels 9 are provided to facilitate the cabinet 3 to be moved to a required 25 position. As shown in FIGS. 1 to 6, the crossbar 19 and the conveying belt 20 are in a parallel and non-contact state. A reason why the crossbar 19 is not in contact with the conveying belt 20 is to ensure that the cartridge 21 can move stably on the crossbar 19. 2026205484   09 Jul 2026 As shown in FIG. 5, the chocolate 3D printing device further includes two vertical rods 23 and mounting blocks 24. The two vertical rods 23 are arranged on the cabinet, and each of the two vertical rods 23 is provided with a mounting block 24 in a sliding way. Two ends of the crossbar 19 are respectively matched with the two mounting blocks 24, the conveying belt 20 5 is rotatably matched with a pulley on the mounting block; a lead screw mechanism is provided in the cabinet, and a slider of the lead screw mechanism is fixed with the mounting block. In the above structure, because the mounting block 24 can slide on the vertical rod 23, the slider may slide up and down when the lead screw mechanism 25 operates, and sliding up and down of the slider can drive the mounting block 24 to slide up and down along the vertical rod, 10 so as to realize lifting of the crossbar 19 and the conveying belt 20, which can realize lifting of the nozzle 22 and the cartridge 21, thus better meeting requirements of chocolate printing. The transverse moving motor (not shown) in cooperative linkage with the pulley on the conveying belt is also arranged on the mounting block. Referring to FIGS. 7 to 14, a holding mechanism 32 is fixed at a right side of the cabinet 15   3, the holding mechanism 32 includes a fixed frame 33, a rotating shaft 34 is rotatably connected inside the fixed frame 33, a first shelf 35 is fixed on an outer surface of the rotating shaft 34, a through groove 36 is defined in the first shelf 35, a slideway 37 is defined on each of internal front and rear surfaces of the through groove 36, a sliding rod 38 is movably connected jointly inside two slideways 37, a connecting frame 39 is fixed on an outer surface of the sliding rod 20   38, a second shelf 40 is fixed at a top end of the connecting frame 39, and a worm wheel 41 is fixed both in front of and behind the first shelf 35 on the outer surface of the rotating shaft 34. A bracket 42 is fixed on each of front and rear surfaces of the first shelf 35, and a worm 43 is rotatably connected to a left side of the bracket 42, the worm 43 is meshed with the worm wheel 41 below. An internally threaded cylinder 44 is fixed to a right side of the bracket 42, an 25 externally threaded cylinder 45 is threadedly connected to a right inner side of the internally threaded cylinder 44, a right end of the worm 43 penetrates into the internally threaded cylinder 44 and is fixed with a rectangular rod 46, a right end of the rectangular rod 46 is slidably connected inside the externally threaded cylinder 45, an external surface of the externally 2026205484   09 Jul 2026 threaded cylinder 45 is threadedly connected with a slider 47, and a side of the slider 47 proximate to the second shelf 40 is slidably connected with a guide rail 48. A press block 49 is fixed below both the front and rear surfaces of the first shelf 35, a waste bin 50 is fixed at a bottom of the fixed frame 33, two rotating rods 51 are rotatably connected 5 inside the waste bin 50, a waste bucket 52 is fixed on an outer surface of each of the rotating rods 51, a right end of the waste bucket 52 penetrates to a right side of the waste bin 50 and is fixed with the waste bucket 52. An outer surface of the waste bucket 52 is meshed with a rack 53, and a fixed plate 54 is slidably connected with an interior of the rack 53. Both fixed plates 54 are fixedly connected with the waste bin 50, and the fixed plate 54 and the interior of the 10 rack 53 are jointly connected with a spring 55. A top end of the rack 53 is attached to a lower surface of the press block 49. An upper part of a right end of the first shelf 35 and a left end of the second shelf 40 are both in an inclined-surface-shaped structure, the right end of the first shelf 35 is attached to the left end of the second shelf 40, and an upper surface of the right end of the first shelf 35 is 15 attached to a lower surface of the second shelf 40. Both front and rear surfaces of the fixed frame 33 are integrally formed with a mounting plate 58, and the holding mechanism 32 is detachably connected with the cabinet 3 through the mounting plates 58 and bolts. An operation principle of the holding mechanism 32 is as follows: 20         I. Initial state: standing, folding, and storage The first shelf 35 and the second shelf 40 vertically stand, are completely folded and attached to a right side of the cabinet 3; The second shelf 40 is stacked above the first shelf 35, and the inclined surfaces of the two shelves are attached with each other; 25        The worm 43 is meshed with the worm wheel 41 on the rotating shaft 34, the externally threaded cylinder 45 is completely retracted into the internally threaded cylinder 44, and the slider 47 is located at a root of the externally threaded cylinder 45. 2026205484   09 Jul 2026 II. Manually flip (vertical ^ horizontal) and simultaneously unfold shelves. The vertically folded first shelf 35 is turned outwards around the rotating shaft 34 by hand from a vertical posture to a horizontal discharging posture, and the whole process is mechanically linked, which is divided into following four steps. 5        Worm 43: revolving and rotating (driven by the worm wheel 41): when the first shelf 35 turns around the rotating shaft 34, it drives the bracket 42 and the worm wheel 43 to revolve around the worm wheel 41, the worm wheel 41 is fixed on the rotating shaft 34 and does not rotate, and the revolving worm 43 is pushed by a tooth surface of the worm wheel 41 and forced to rotate (axially). 10        Externally threaded cylinder 45: rotating and outward moving (matched with the internally threaded cylinder 44): the rectangular rod 46 at the right end of the worm 43 is inserted into the externally threaded cylinder 45, and rotation of the worm 43 drives the externally threaded cylinder 45 to rotate synchronously, and the externally threaded cylinder 45 is threadedly meshed with the internally threaded cylinder 44 on the bracket 42, and moves outward in an 15 axial direction when rotating. Slide block 47: spiral sliding+horizontal extension (overlapping motion): the externally threaded cylinder 45 rotates and extends at the same time, the slider 47 is sleeved outside the externally threaded cylinder 45 and clamped on the guide rail 48 (which can only slide but not rotate), and the rotation and extension of the externally threaded cylinder 45 drives the slider 20   47 to slide along a cylinder surface and extend horizontally, resulting in a horizontal thrust. Second shelf 40: foldings unfolding (slideway 37 expands and contracts): the slider 47 is connected with the second shelf 40 through the guide rail 48, the horizontal thrust pulls the sliding rod 38 to slide in the slideway 37 in the through groove 36 of the first shelf 35, and the second shelf 40 is smoothly extended to a horizontally unfolded posture from a folded state of 25 being attached with the first shelf 35, and the inclined surfaces of the two shelves are attached with each other, with smooth and stable splicing, which matches a discharging position of the bearing plate 12. 2026205484   09 Jul 2026 III. Reverse action: manual turning back to vertical, with synchronous folding The horizontal first shelf 35 is turned back to the vertical posture by hand: the worm 43 revolves and rotates reversely ^ the externally threaded cylinder 45 rotates reversely and retracts ^ the slider 47 slides reversely; 5        the sliding rod 38 retreats ^ the second shelf 40 is automatically folded and is attached to the first shelf 35 again to restore the vertical storage state. IV. Waste linkage (synchronous with flipping) In unfolding, the press block 49 at the bottom of the first shelf 35 presses down the rack 53^ overcomes an elastic force of the spring 55 ^ the waste bucket 52 turns outward around 10 the rotating rod 51 in the waste bin 50 to receive chocolate residue; in storage: the press block 49 is separated from the rack 53^ the spring 55 resets to pull the rack 53 back ^ the waste bucket 52 is closed inward, and the residue falls into the waste bin 50, and a garbage bag is hung by the hook 57, and the residue is finally discharged from the garbage bag through the discharge port 56 for collection; 15        The whole holding mechanism 32 is detachably fixed at a right side of the cabinet 3 through the fixed frame 33, the mounting plate 58 and bolts. To sum up, the holding mechanism 32 is adapted to the wrapped chocolate 3D printing device, and when the bearing plate 12 serves to discharge after printing is completed, the holding mechanism is synchronously unfolded to provide a stable bearing surface, which is 20 convenient for placing finished products, tools or packaging, and meets requirements of selfservice picking. When the holding mechanism is idle, it is folded and stored, without occupying extra space, which is suitable for design target of mobility and miniaturization of the device. The linked waste bucket 52 collects residues in real time, which avoids polluting a printing area and finished products, ensures a clean food-grade environment, does not affect original core 25 performance of the printer such as anti-jamming, reliable printing and rapid curing, and improves commercial practicability and cleanliness of the device. The above embodiments only presents part of embodiments of the present disclosure, and their descriptions are specific and detailed, but they cannot be understood as limiting the scope of the present disclosure. It should be noted that technical solutions recorded in the above 2026205484   09 Jul 2026 embodiments can still modified and part of technical features can be equivalently replaced for those skilled in the art. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of this disclosure shall be encompassed within the protection scope of this disclosure.

Claims

1. A chocolate 3D printing device comprising a cabinet, a cartridge and a nozzle, whereina first accommodating cavity is provided in the cabinet, a crossbar is provided in the first accommodating cavity, the cartridge is slidably installed on the crossbar, the nozzle is arranged at an end of the cartridge, and the nozzle is communicated with the cartridge; a conveying belt is rotatably installed in the first accommodating cavity through a pulley, the conveying belt passes through the cartridge, and both ends of the conveying belt are respectively connected and fixed with the cartridge; and a transverse movable motor is provided in the cabinet, the transverse movable motor is matched with the pulley, and a control host is provided in the cabinet, the transverse movable motor and the nozzle are both electrically connected with the control host, and an industrial vision camera is provided on an inner wall of the first accommodating cavity; anda holding mechanism is fixed at a right side of the cabinet.

2. The chocolate 3D printing device according to claim 1, further comprising: a bearing table, which is arranged at a bottom of the first accommodating cavity, a bearing plate is slidably arranged on the bearing table, and a mobile dispensing mechanism is provided inside the bearing table and matched with the bearing plate, and the mobile dispensing mechanism is matched with the control host; and the bearing plate is made of aluminum alloy, and a thermoelectric cooler is provided in the cabinet, and a cold end of the thermoelectric cooler is located in the first accommodating cavity, and the cold end of the thermoelectric cooler is configured to be contacted with the bearing plate.

3. The chocolate 3D printing device according to claim 2, wherein the mobile dispensing mechanism comprises a bottom guide rod, a dispensing motor, a dispensing belt and a dispensing guide slider, wherein the bottom guide rod is arranged within the bearing table, the dispensing belt is rotatably installed within the bearing table through the pulley, the dispensing guide slider is arranged on the bottom guide rod, the bearing plate is fixed to the dispensing guide slider, the dispensing belt is fixed with an end of the bearing plate, and the dispensing motor is matched with one of the pulleys on the dispensing belt.2026205484   09 Jul 20264. The chocolate 3D printing device according to claim 1, further comprising: two lifting belts, which are each rotatably installed on the cabinet through a pulley, and the two lifting belts are respectively located on two sides of the first accommodating cavity, and a linkage rod is arranged between the two lifting belts, a door plate is slidably provided at a cavity opening of the first accommodating cavity, and the door plate is matched with the lifting belts, and a lifting motor is arranged in the cabinet, and the lifting motor is matched with the pulley, a strip brush is provided at an end of the door plate, and a sum of a height of the door plate and a height of the strip brush is equal to a height of the first accommodating cavity.

5. The chocolate 3D printing device according to claim 1, further comprising: two vertical rods and mounting blocks, wherein the two vertical rods are arranged on the cabinet, and each of the two vertical rods is provided with a mounting block in a sliding way, two ends of the crossbar are respectively matched with the two mounting blocks, the conveying belt is rotatably matched with a pulley on the mounting block; a lead screw mechanism is provided in the cabinet, and a slider of the lead screw mechanism is fixed with the mounting block; and the crossbar and the conveying belt are in a parallel and non-contact state.

6. The chocolate 3D printing device according to claim 1, wherein the cabinet is provided with an operation display screen which is electrically connected with the control host.

7. The chocolate 3D printing device according to claim 1, wherein the cabinet is provided with a coin-feeding component, a banknote reception component and a card-reading component, and the coin-feeding component, the banknote reception component and the card-reading component are all electrically connected with the control host.

8. The chocolate 3D printing device according to claim 1, wherein the cabinet is provided with a voice broadcasting component which is electrically connected with the control host, and the2026205484   09 Jul 2026cabinet is provided with a display cavity, a display plate is provided in the display cavity, and a transparent cover plate is provided at an opening of the display cavity.

9. The chocolate 3D printing device according to claim 1, wherein a plurality of universal wheels are provided at a bottom of the cabinet.

10. The chocolate 3D printing device according to claim 1, wherein the holding mechanism comprises a fixed frame, a rotating shaft is rotatably connected inside the fixed frame, a first shelf is fixed on an outer surface of the rotating shaft, a through groove is defined in the first shelf, a slideway is defined on each of internal front and rear surfaces of the through groove, a sliding rod is movably connected jointly inside two slideways, a connecting frame is fixed on an outer surface of the sliding rod, a second shelf is fixed at a top end of the connecting frame, and a worm wheel is fixed both in front of and behind the first shelf on the outer surface of the rotating shaft, a bracket is fixed on each of front and rear surfaces of the first shelf, and a worm is rotatably connected to a left side of the bracket, the worm is meshed with the worm wheel below, an internally threaded cylinder is fixed to a right side of the bracket, an externally threaded cylinder is threadedly connected to a right inner side of the internally threaded cylinder, a right end of the worm penetrates into the internally threaded cylinder and is fixed with a rectangular rod, a right end of the rectangular rod is slidably connected inside the externally threaded cylinder, an external surface of the externally threaded cylinder is threadedly connected with a slider, and a side of the slider proximate to the second shelf is slidably connected with a guide rail;a press block is fixed below both the front and rear surfaces of the first shelf, a waste bin is fixed at a bottom of the fixed frame, two rotating rods are rotatably connected inside the waste bin, a waste bucket is fixed on an outer surface of each of the rotating rods, an outer surface of the waste bucket is meshed with a rack, and a fixed plate is slidably connected with an interior of the rack, both fixed plates are fixedly connected with the waste bin, and the fixed plate and the interior of the rack are jointly connected with a spring;a top end of the rack is attached to a lower surface of the press block;2026205484   09 Jul 2026an upper part of a right end of the first shelf and a left end of the second shelf are both in an inclined-surface-shaped structure, the right end of the first shelf is attached to the left end of the second shelf, and an upper surface of the right end of the first shelf is attached to a lower surface of the second shelf; andboth front and rear surfaces of the fixed frame are integrally formed with a mounting plate, and the holding mechanism is detachably connected with the cabinet through the mounting plates and bolts.

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