A self-service cash register machine

Abstract

The present invention discloses a self-service cash register integrated machine, which relates to the field of cash register technology and includes a loading platform for placing and weighing goods; a scanning module for collecting image information of the goods on the loading platform; a printing module, which includes a rubber roller and a thermal frame, the rubber roller and the thermal sheet at the bottom of the thermal frame cooperate to print shopping receipts; and an adjustment component, which, when the adjustment component is adjusted to a first state, can limit the position of the rubber roller to prevent the rubber roller and the thermal frame from separating. The present invention adjusts the adjustment component to the first state so that the arc-shaped end of the limit lever limits the core shaft at the bottom of the guide groove, and the core shaft cannot slide along the guide groove, thereby preventing customers from opening the cover from the outside, avoiding damage to the internal structure of the device and ensuring normal use of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of cash registers, and in particular to a self-service cash register integrated machine. Background Art

[0002] The thermal printing device of an existing cash register generally includes a shell and an embedded core component. The embedded core component includes a separator and a base. A paper feeding channel is formed between the separator and the base. The thermal sheet is set on the separator, and the rubber roller is set on the base. The thermal sheet is in contact with the rubber roller. The thermal printing paper presents the printed content after passing through the thermal sheet.

[0003] Chinese patent publication number CN209999884U discloses an embedded thermal printer and thermal printing device that prevents accidental cover opening. The device comprises a base and a cover. The base is provided with a thermal sheet, the cover covers a paper compartment, and a rubber roller is rotatably mounted on the cover, with the thermal sheet and the rubber roller facing each other. The embedded thermal printer also includes a latch, a trigger, and a locking element. The latch comprises a latch portion and a first drive portion. The latch is rotatably mounted on the base and detachably connected to the rubber roller. The trigger comprises a trigger portion and a second drive portion. The trigger is rotatably mounted on the base, the second drive portion abutting the first drive portion and driving the latch portion to rotate. The locking element is movable on the base and engages with the trigger portion for rotational limiting. The latch releasably locks the rubber roller. When opening the printer, the latch is driven by the rotation of the trigger. The locking element and the trigger portion cooperate to prevent accidental cover opening and improve the operating stability of the printer.

[0004] Although the above patent can prevent the cover from being opened by mistake, for self-service checkout equipment, since it is in a state without professional supervision, some customers will still turn off the anti-misopening component and then open the cover by themselves, thereby disturbing the internal structure of the equipment and causing equipment failure. At the same time, the pressure between the above-mentioned thermal printing rubber roller and the thermal print head is unstable and the pressure between the thermal printing rubber roller and the thermal print head cannot be adjusted, thereby affecting the smooth progress of the ticket printing process.

[0005] Therefore, it is necessary to invent a self-service cash register to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a self-service cash register to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a self-service cash register, comprising: a loading platform for placing and weighing goods; a scanning module for collecting image information of the goods on the loading platform; a printing module, which comprises a rubber roller and a thermal frame, the rubber roller and the thermal sheet at the bottom of the thermal frame cooperate to print shopping receipts; an adjustment component, which, when the adjustment component is adjusted to a first state, can limit the position of the rubber roller to prevent the rubber roller and the thermal frame from separating; when the adjustment component is adjusted to a second state, can adjust the pressure between the rubber roller and the thermal frame, and the adjustment component can monitor the pressure between the rubber roller and the thermal frame in real time, and can alarm when the two are forced to separate; a display screen, which is used to display shopping information and provide a user interaction interface.

[0008] Preferably, the printing module also includes an inner core and a roller frame rotatably installed on the front side of the inner core. When the roller frame rotates into the inner core, the core shaft in the middle of the rubber roller is embedded in the guide groove on the side of the inner core. At this time, the rubber roller is in contact with the thermal film, and the adjustment component limits the rubber roller through the core shaft.

[0009] Preferably, the adjustment assembly includes two limiting parts symmetrically mounted on the two outer sides of the inner core. After the roller frame rotates into the inner core, the adjustment assembly can limit the core shaft to the bottom of the guide groove through the limiting parts, so that the roller frame cannot be rotated out of the inner core.

[0010] Preferably, the limiting part includes: a limiting rod, the end of which is arranged to be arc-shaped, and the arc-shaped end of the limiting rod can smoothly contact the core shaft and limit the core shaft; an elastic rotating rod, which is fixedly connected to the limiting rod by a rotating ring and is rotatably installed on the outside of the inner core; when the arc-shaped end of the limiting rod is not in contact with the core shaft, the elastic rotating rod can drive the limiting rod to rotate after being subjected to downward pressure, and the elastic rotating rod will not be deformed downward during this process. When the arc-shaped end of the limiting rod rotates to abut the core shaft, the elastic rotating rod will be deformed downward when it continues to be subjected to downward pressure.

[0011] Preferably, the adjustment assembly also includes: a partition, which is located above the thermal frame; an adjustment plate, which is located above the partition; a first guide column, which is fixedly mounted on the top of the thermal frame, and passes through the adjustment plate and the partition and extends to the top of the adjustment plate; a first elastic member, which is fixedly mounted between the adjustment plate and the partition and can provide a downward thrust to the partition; a pressure sensor, which is fixedly mounted on the bottom of the partition; the first elastic member presses the partition downward so that the detection end of the pressure sensor is against the top of the thermal frame, and the pressure value between the thermal sheet and the rubber roller is transmitted to the pressure sensor through the thermal frame, thereby realizing the monitoring of the pressure value between the thermal sheet and the rubber roller.

[0012] Preferably, the adjustment assembly also includes: a vertical groove, which is opened on both sides of the inner core; an extension plate, which is fixedly installed on the side of the adjustment plate and extends to the outside of the inner core through the vertical groove; a connecting ear, which is fixedly installed on the inner side of the inner core; a second guide column, which is fixedly installed on the top of the adjustment plate and extends to the top of the connecting ear; a second elastic member, which is fixedly installed between the top of the connecting ear and the second guide column, and the second elastic member can provide an upward thrust to the second guide column so that the extension plate is located at the highest position in the vertical groove.

[0013] Preferably, the adjustment assembly also includes: a driving rod, which is slidably mounted on the side of the inner core, and the bottom end of the driving rod abuts against the top of the elastic rotating rod; a connecting rod, which is fixedly mounted on the top of the driving rod and is located above the extension plate; a micro linear motor, which is fixedly mounted on the side of the inner core, and the movable end is fixedly connected to the driving rod, and the micro linear motor can drive the driving rod to slide up and down.

[0014] Preferably, the adjustment assembly further includes: a push-up frame, which is fixedly mounted on the bottom of the thermal frame; a push-up rod, which is fixedly mounted on the top of the roller frame; when the roller frame rotates out of the inner core, the push-up rod will force the push-up frame to drive the thermal frame to move upward, causing squeezing of the pressure sensor.

[0015] Preferably, the printing module also includes: an outer shell, which is sleeved on the outside of the inner core; a cover plate, which is rotatably installed on the front side of the outer shell, and the roller frame is fixedly installed on the cover plate, and the rubber roller and the thermal film can be fitted or separated from each other by rotating the cover plate; a paper bin, which is fixedly installed inside the outer shell and located on the rear side of the inner core, for storing printing paper; a driving part, which is installed on the outside of the inner core, for driving the rubber roller to rotate.

[0016] The technical effects and advantages of the present invention are as follows:

[0017] 1. The present invention adjusts the adjustment component to the first state so that the arc-shaped end of the limit lever restricts the core shaft at the bottom of the guide groove, and the core shaft cannot slide along the guide groove. In this way, the customer cannot open the cover from the outside, thereby avoiding damage to the internal structure of the equipment and ensuring the normal use of the equipment.

[0018] 2. The present invention uses a push-up frame and a push-up rod in conjunction. When a customer forcibly opens the cover from the outside, the push-up rod pushes the push-up frame upward. The pressure sensor detects and transmits the information of the pressure value change between the partition and the thermal frame to the controller. The controller issues an alarm through the alarm module to remind that a customer is trying to forcibly open the cover from the outside.

[0019] 3. The present invention realizes real-time monitoring of the pressure between the rubber roller and the thermal sheet during the printing process by providing a pressure sensor. When a stable pressure cannot be maintained between the thermal sheet and the rubber roller, the adjustment component is adjusted to the second state so that the adjustment plate presses down on the first elastic member and the partition, thereby increasing the pressure applied by the pressure sensor to the thermal frame, and further increasing the pressure between the thermal sheet and the rubber roller. In this way, the pressure between the rubber roller and the thermal sheet is adjusted, so that a stable pressure is maintained between the rubber roller and the thermal sheet, thereby ensuring the smooth progress of the bill printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the positions of the scanning module and the printing module of the present invention.

[0022] Figure 3 Schematic diagram of the matching of the housing and the cover of the present invention.

[0023] Figure 4 This is a schematic diagram of the installation position of the paper bin of the present invention.

[0024] Figure 5 This is a schematic diagram of the installation position of the roller stand of the present invention.

[0025] Figure 6 Schematic diagram of the structure of the inner core of the present invention.

[0026] Figure 7 Schematic diagram of the installation position of the connecting ear of the present invention.

[0027] Figure 8 It is a schematic diagram of the cooperation between the push frame and the push rod of the present invention.

[0028] Figure 9 Schematic diagram of the cooperation between the thermal sheet and the rubber roller of the present invention.

[0029] Figure 10 Schematic diagram of the structure of the adjustment component of the present invention.

[0030] Figure 11 This is a schematic structural diagram of the adjustment component of the present invention when it is in an initial state.

[0031] Figure 12 This is a schematic structural diagram of the adjustment component of the present invention when it is in the first state.

[0032] Figure 13 This is a schematic structural diagram of the adjustment component of the present invention when it is in the second state.

[0033] In the figure: 1. stage; 2. scanning module; 3. printing module; 4. adjustment component; 5. display screen; 31. rubber roller; 32. thermal frame; 33. thermal sheet; 34. inner core; 35. roller frame; 36. core shaft; 37. guide groove; 38. outer shell; 39. cover plate; 310. paper bin; 311. driving part; 41. limiting part; 42. partition; 43. adjustment plate; 44. first guide post; 45. first elastic member; 46. pressure sensor; 47. vertical slot; 48. extension plate; 49. connecting ear; 410. second guide post; 411. second elastic member; 412. driving rod; 413. connecting rod; 414. micro linear motor; 415. top frame; 416. top rod; 4101. limiting rod; 4102. elastic rotating rod; 4103. rotating ring. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] The present invention provides Figures 1 to 13 The self-service cash register shown includes:

[0036] The loading platform 1 is used to place goods and weigh them. A weighing pan and a weighing sensor are installed inside the loading platform 1. Goods are placed on the weighing pan for weighing, and the weighing information is transmitted to the controller. The weighing pan and the weighing sensor are existing technologies and will not be described in detail here.

[0037] The scanning module 2 is used to collect image information of the goods on the loading platform 1. The scanning module 2 includes a camera and an image recognition module. The camera is used to capture the image information of the goods on the scale and transmit it to the image recognition module for processing. The camera and the image recognition module are existing technologies and will not be repeated here.

[0038] The printing module 3 includes a rubber roller 31 and a thermal frame 32. The rubber roller 31 cooperates with a thermal sheet 33 at the bottom of the thermal frame 32 to print shopping receipts.

[0039] Specifically, the printing module 3 also includes an inner core 34 and a roller frame 35 rotatably installed on the front side of the inner core 34. A mounting groove is provided on the top of the roller frame 35, and the core shaft 36 in the middle of the rubber roller 31 is rotatably installed in the mounting groove. When the roller frame 35 rotates into the inner core 34, the core shaft 36 in the middle of the rubber roller 31 is embedded in the guide groove 37 on the side of the inner core 34. At this time, the rubber roller 31 is in contact with the thermal film 33, and the adjustment component 4 limits the rubber roller 31 through the core shaft 36.

[0040] More specifically, the printing module 3 also includes: a shell 38, which is sleeved on the outside of the inner core 34; a cover plate 39, which is rotatably installed on the front side of the shell 38, and the roller frame 35 is fixedly installed on the cover plate 39. The rubber roller 31 and the roller frame 35 rotate synchronously with the cover plate 39. By rotating the cover plate 39, the rubber roller 31 and the thermal film 33 can be fitted or separated from each other; a paper bin 310, which is fixedly installed inside the shell 38 and located on the rear side of the inner core 34, and is used to store printing paper. The printing paper passes between the rubber roller 31 and the thermal film 33 to print the bill; a driving unit 311, which is installed on the outside of the inner core 34 and is used to drive the rubber roller 31 to rotate.

[0041] It should be noted that the driving part 311 includes gear 1, gear 2 and a pulley. Gear 1 is fixedly mounted on one end of the core shaft 36. Gear 2 and the pulley are both rotatably mounted on the outside of the inner core 34. Gear 1 and gear 2 are meshed with each other. A micro drive motor is fixedly mounted inside the inner core 34. The output shaft of the micro drive motor and the pulley, and the pulley and gear 2 are connected by belt transmission. The micro drive motor drives gear 2 to rotate through the belt and pulley, and gear 2 drives the core shaft 36 to rotate through gear 1, so that the core shaft 36 drives the rubber roller 31 to rotate, thereby realizing the transportation and printing of printing paper.

[0042] Adjustment component 4, when the adjustment component 4 is in the initial state, the guide groove 37 is in an open state, which facilitates the core shaft 36 to be embedded in the guide groove 37. When the adjustment component 4 is adjusted to the first state, the position of the rubber roller 31 can be limited to prevent the rubber roller 31 and the thermal frame 32 from separating. When the adjustment component 4 is adjusted to the second state, the pressure between the rubber roller 31 and the thermal frame 32 can be adjusted, and the adjustment component 4 can monitor the pressure between the rubber roller 31 and the thermal frame 32 in real time, and can alarm when the two are forced to separate.

[0043] Specifically, the adjustment component 4 includes two limiting parts 41 symmetrically mounted on the two outer sides of the inner core 34. After the roller frame 35 rotates into the inner core 34, the adjustment component 4 can limit the core shaft 36 to the bottom of the guide groove 37 through the limiting parts 41, so that the roller frame 35 cannot be rotated out of the inner core 34.

[0044] More specifically, the limiting portion 41 includes: a limiting rod 4101, the end of which is arranged to be arc-shaped. The arc-shaped end of the limiting rod 4101 can smoothly contact the core shaft 36 and limit the core shaft 36, and the arc-shaped end will not interfere with the rotation of the core shaft 36; an elastic rotating rod 4102, which is fixedly connected to the limiting rod 4101 through a rotating ring 4103, and is rotatably installed on the outer side of the inner core 34. When the elastic rotating rod 4102 is subjected to downward extrusion force, it will drive the limiting rod 4101 to rotate through the rotating ring 4103, so that the arc-shaped end of the limiting rod 4101 moves upward and abuts the core shaft 36. The weight of the arc-shaped end of the limiting rod 4101 is greater than that of the elastic rotating rod 4102. When the elastic rotating rod 4102 is not subjected to downward extrusion force, the position of the arc-shaped end of the limiting rod 4101 is lower than the height of the guide groove 37.

[0045] It should be noted that when the arc-shaped end of the limit rod 4101 is not in contact with the core shaft 36, the elastic rotating rod 4102 can drive the limit rod 4101 to rotate through the rotating ring 4103 after being subjected to downward pressure. During this process, the elastic rotating rod 4102 will not deform downward. When the arc-shaped end of the limit rod 4101 rotates to abut against the core shaft 36, the elastic rotating rod 4102 will deform downward when it continues to be subjected to downward pressure.

[0046] At the same time, the adjustment component 4 also includes: a partition 42, which is located above the thermal frame 32; an adjustment plate 43, which is located above the partition 42; a first guide column 44, which is fixedly installed on the top of the thermal frame 32, and passes through the adjustment plate 43 and the partition 42 and extends to the top of the adjustment plate 43, and the top of the first guide column 44 will not fall out of the adjustment plate 43; a first elastic member 45, which is fixedly installed between the adjustment plate 43 and the partition 42, and can provide a downward thrust to the partition 42; a pressure sensor 46, which is fixedly installed at the bottom of the partition 42.

[0047] It should be noted that the first elastic member 45 presses down the partition 42, so that the detection end of the pressure sensor 46 is against the top of the thermal frame 32, and the pressure value between the thermal sheet 33 and the rubber roller 31 is transmitted to the pressure sensor 46 through the thermal frame 32. The pressure sensor 46 transmits the monitored pressure value to the controller, thereby realizing real-time monitoring of the pressure value between the thermal sheet 33 and the rubber roller 31.

[0048] In addition, the adjustment assembly 4 also includes: a vertical slot 47, which is opened on both sides of the inner core 34; an extension plate 48, which is fixedly mounted on the side of the adjustment plate 43 and extends to the outside of the inner core 34 through the vertical slot 47; a connecting ear 49, which is fixedly mounted on the inner side of the inner core 34; a second guide post 410, which is fixedly mounted on the top of the adjustment plate 43 and extends to the top of the connecting ear 49. The second guide post 410 can slide up and down along the connecting ear 49 and will not fall out of the connecting ear 49; a second elastic member 411, which is fixedly mounted between the top of the connecting ear 49 and the second guide post 410. The second elastic member 411 can provide an upward force for the second guide post 410 The thrust causes the extension plate 48 to be located at the highest position in the vertical slot 47; the driving rod 412 is slidably mounted on the side of the inner core 34, and the bottom end of the driving rod 412 abuts against the top end of the elastic rotating rod 4102; the connecting rod 413 is fixedly mounted on the top end of the driving rod 412 and is located above the extension plate 48; the micro linear motor 414 is fixedly mounted on the side of the inner core 34, and the movable end is fixedly connected to the driving rod 412, the micro linear motor 414 is connected to the controller electrical signal, the controller can adjust the working state of the micro linear motor 414, and the micro linear motor 414 can drive the driving rod 412 to slide up and down.

[0049] Moreover, the adjustment component 4 also includes: a push-up frame 415, which is fixedly mounted on the bottom of the thermal frame 32; a push-up rod 416, which is fixedly mounted on the top of the roller frame 35, the side of the push-up frame 415 is an inclined arc structure and the top of the push-up rod 416 is hemispherical, which facilitates the push-up rod 416 to slide along the push-up frame 415; when the roller frame 35 rotates out of the inner core 34, the push-up rod 416 will force the push-up frame 415 to drive the thermal frame 32 to move upward, causing squeezing of the pressure sensor 46.

[0050] The display screen 5 is used to display shopping information and provide a user interaction interface. A controller is installed inside the display screen 5. The controller is used to receive and process information from each module and control the overall operation of the device. The setting of the controller is existing technology and will not be repeated here. It is not shown in the figure. The controller transmits the received product information, price, payment code, etc. to the display screen 5 for the user to observe and operate.

[0051] In summary, when installing the rubber roller 31, first adjust the adjustment component 4 to the initial state, such as Figure 11As shown, at this time, the driving rod 412 is at the highest position, the connecting rod 413 is not released from the extension plate 48, and the extension plate 48 is located at the highest position in the vertical groove 47 under the thrust of the second elastic member 411. The bottom end of the driving rod 412 does not press downward on the elastic rotating rod 4102, and the arc-shaped end of the limiting clamping rod 4101 is located below the guide groove 37. The guide groove 37 is in an open state. At this time, the rotating cover 39 is buckled on the front side of the shell 38, and the rubber roller 31 rotates to a state of being in contact with the thermal sheet 33.

[0052] Then adjust the adjustment component 4 to the first state, that is, Figure 12 As shown, the first state is that the limit rod 4101 limits the core shaft 36 to the bottom of the guide groove 37, and at this time the connecting rod 413 just abuts the top of the extension plate 48, and the extension plate 48 is still at the highest position in the vertical groove 47; specifically, the process of adjusting the adjustment component 4 from the initial state to the first state is: the micro linear motor 414 pushes the driving rod 412 to move downward, and the bottom end of the driving rod 412 will push down against the elastic rotating rod 4102, so that the elastic rotating rod 4102 drives the limit rod 4101 to rotate through the rotating ring 4103 until the arc-shaped end of the limit rod 4101 abuts against the core shaft 36, thereby preventing the core shaft 36 from sliding outward along the guide groove 37.

[0053] When the elastic force of the first elastic member 45 is weakened due to long-term use, the first elastic member 45 will not be able to provide sufficient thrust to the partition 42. At this time, the downward pressure exerted by the partition 42 on the thermal frame 32 through the pressure sensor 46 will be reduced, thereby causing the pressure between the thermal sheet 33 and the rubber roller 31 to decrease, resulting in unstable pressure between the thermal sheet 33 and the rubber roller 31, thereby affecting the printing effect. At this time, the adjustment component 4 is adjusted to the second state, that is, Figure 13As shown, in the second state, the limit card rod 4101 maintains contact with the core shaft 36, the elastic rotating rod 4102 is deformed downward, and the connecting rod 413 presses down the extension plate 48, so that the adjustment plate 43 applies downward pressure to the first elastic member 45 and the partition 42; specifically, the process of adjusting the adjustment component 4 from the first state to the second state is as follows: the micro linear motor 414 pushes the driving rod 412 to move further downward, and the bottom end of the driving rod 412 further presses downward against the elastic rotating rod 4102, and because the arc end of the limit card rod 4101 has pressed against the core shaft 36 at this time, the limit card rod 410 1 will no longer rotate and will always remain in contact with the core shaft 36. The bottom end of the driving rod 412 will cause the elastic rotating rod 4102 to deform downward. During the further downward movement of the driving rod 412, the connecting rod 413 will press down the extension plate 48, so that the extension plate 48 drives the adjustment plate 43 to move downward, exerting downward pressure on the first elastic member 45 and the partition 42, thereby increasing the pressure exerted by the partition 42 and the pressure sensor 46 on the thermal frame 32, and further increasing the pressure between the thermal sheet 33 and the rubber roller 31, thereby achieving the adjustment of the pressure between the rubber roller 31 and the thermal sheet 33.

[0054] When the customer forcibly opens the cover 39 from the outside, the roller frame 35 will rotate outward along with the cover 39, and the core shaft 36 will push the limit lever 4101 to rotate. Figure 12 In the first state shown, the bottom end of the driving rod 412 pushes against the elastic rotating rod 4102, so the elastic rotating rod 4102 will be deformed downward to a certain extent, and at the same time, the roller frame 35 drives the pushing rod 416 to move synchronously. Since the top of the pushing rod 416 will first rise during the outward rotation of the roller frame 35, the pushing rod 416 will push the thermal frame 32 upward through the pushing frame 415, so that the pressure value monitored by the pressure sensor 46 changes. At this time, the pressure sensor 46 transmits the monitoring signal to the controller, and the controller controls the alarm module to issue an alarm.

[0055] The controller adjusts the adjustment component 4 to the first state, so that the arc-shaped end of the limit rod 4101 abuts against the core shaft 36, and the core shaft 36 is restricted to the bottom of the guide groove 37. The core shaft 36 cannot slide along the guide groove 37, so that the customer cannot open the cover 39 from the outside, thereby avoiding damage to the internal structure of the equipment and ensuring that the equipment can be used normally.

[0056] When a customer forcibly opens the cover 39 from the outside, the push-up frame 415 is pushed upward by the push-up rod 416, and the pressure sensor 46 detects the change in the pressure value between the partition 42 and the thermal frame 32, and transmits the information of the pressure value change to the controller in time, so that the controller issues an alarm through the alarm module to remind that a customer is trying to forcibly open the cover 39 from the outside.

[0057] By arranging a pressure sensor 46 between the partition 42 and the thermal frame 32, the pressure between the rubber roller 31 and the thermal sheet 33 during the printing process can be monitored in real time.

[0058] When the elasticity of the first elastic member 45 is weakened and stable pressure cannot be maintained between the thermal sheet 33 and the rubber roller 31, the controller adjusts the adjustment component 4 to the second state, so that the connecting rod 413 presses down the first elastic member 45 and the partition 42 through the adjustment plate 43, thereby increasing the pressure applied by the pressure sensor 46 to the thermal frame 32, and then increasing the pressure between the thermal sheet 33 and the rubber roller 31, thereby achieving the adjustment of the pressure between the rubber roller 31 and the thermal sheet 33, so that stable pressure is maintained between the rubber roller 31 and the thermal sheet 33, and ensuring the smooth progress of the bill printing process.

[0059] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-service cash register machine, characterized in that: include: A loading platform for placing goods and weighing them; Scanning module, used to collect image information of the goods on the loading platform; The printing module includes a rubber roller and a thermal frame. The rubber roller cooperates with the thermal sheet at the bottom of the thermal frame to print the shopping receipt. The adjusting component, when adjusted to a first state, can limit the position of the rubber roller to prevent the rubber roller and the heat-sensitive frame from separating; when adjusted to a second state, can adjust the pressure between the rubber roller and the heat-sensitive frame; and the adjusting component can monitor the pressure between the rubber roller and the heat-sensitive frame in real time and can issue an alarm when the two are forcibly separated; The printing module also includes an inner core and a roller frame rotatably mounted on the front side of the inner core. When the roller frame rotates into the inner core, the core shaft in the middle of the rubber roller is embedded in the guide groove on the side of the inner core. At this time, the rubber roller is in contact with the thermal film, and the adjustment component limits the rubber roller through the core shaft. The adjustment assembly includes two limiting parts symmetrically mounted on the two outer sides of the inner core. After the roller frame rotates into the inner core, the adjustment assembly can limit the core shaft to the bottom of the guide groove through the limiting parts, so that the roller frame cannot rotate out of the inner core. The limiting portion includes: The end of the limiting clamp rod is set to an arc shape, and the arc-shaped end of the limiting clamp rod can smoothly contact the core shaft and limit the core shaft; The elastic rotating rod is fixedly connected to the limit clamping rod through a rotating ring and is rotatably mounted on the outside of the inner core; When the arc-shaped end of the limit card rod is not in contact with the core shaft, the elastic rotating rod is able to drive the limit card rod to rotate under the downward pressure. During this process, the elastic rotating rod will not deform downward. When the arc-shaped end of the limit card rod rotates to abut against the core shaft, the elastic rotating rod will continue to deform downward under the downward pressure. The display screen is used to display shopping information and provide a user interaction interface.

2. The self-service cash register according to claim 1, characterized in that: The adjustment component also includes: a partition plate located above the thermal rack; an adjusting plate, which is located above the partition; A first guide post is fixedly mounted on the top of the thermal frame, passes through the adjustment plate and the partition, and extends to the top of the adjustment plate; a first elastic member, which is fixedly installed between the adjustment plate and the partition plate and can provide a downward thrust to the partition plate; A pressure sensor is fixedly mounted on the bottom of the partition; The first elastic member presses down the partition, so that the detection end of the pressure sensor abuts against the top of the thermal frame. The pressure value between the thermal sheet and the rubber roller is transmitted to the pressure sensor through the thermal frame, thereby monitoring the pressure value between the thermal sheet and the rubber roller.

3. The self-service cash register according to claim 2, characterized in that: The adjustment component also includes: Vertical grooves are opened on both sides of the inner core; an extension plate, which is fixedly mounted on a side surface of the adjustment plate and extends through the vertical slot to the outside of the inner core; A connecting ear, which is fixedly mounted on the inner side of the inner core; A second guide post is fixedly mounted on the top of the adjustment plate and extends to the top of the connecting ear; The second elastic member is fixedly installed between the top of the connecting ear and the second guide column. The second elastic member can provide an upward thrust to the second guide column so that the extension plate is located at the highest position in the vertical slot.

4. The self-service cash register according to claim 3, characterized in that: The adjustment component also includes: A driving rod is slidably mounted on the side of the inner core, and the bottom end of the driving rod abuts against the top end of the elastic rotating rod; A connecting rod, which is fixedly mounted on the top end of the driving rod and located above the extension plate; The micro linear motor is fixedly mounted on the side of the inner core, and the movable end is fixedly connected to the driving rod. The micro linear motor can drive the driving rod to slide up and down.

5. The self-service cash register according to claim 4, characterized in that: The adjustment component also includes: A top frame, which is fixedly installed on the bottom of the thermal frame; A push rod, which is fixedly installed on the top of the roller frame; When the roller frame rotates out of the inner core, the push rod will force the push frame to drive the thermal frame to move upward, causing compression on the pressure sensor.

6. The self-service cash register according to claim 5, characterized in that: The printing module also includes: An outer shell, which is arranged outside the inner core; The cover plate is rotatably mounted on the front side of the housing, and the roller frame is fixedly mounted on the cover plate. The rubber roller and the thermal sheet can be attached to or separated from each other by rotating the cover plate. The paper bin is fixedly installed inside the shell and located at the rear side of the inner core, and is used to store printing paper; The driving part is installed on the outside of the inner core and is used to drive the rubber roller to rotate.

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