Cash drawer interface detection and drive device

Abstract

The present invention provides a cashier cashbox interface detection and drive device, comprising: multiple interface detection modules and an interface drive module; a first detection switch module, having a first end, a second end and a first switch group, the first end being connected to a first resistor and a voltage detection end, the second end being connected to the first end of the interface detection module, and the second end of the interface detection module being respectively connected to interfaces corresponding to the cashier cashbox; the first resistor being connected to a first power supply signal; a second detection switch module, having a third end, a fourth end and a second switch group, the third end being connected to the first end of the interface detection module, and the fourth end being connected to a second resistor; a main controller, being configured to: control switches in the first and second switch groups corresponding to any two different interfaces among a plurality of interfaces to be turned on and off simultaneously through a detection switch module control end; and outputting the result of cashier cashbox interface detection based on a comparison between a voltage detection signal received by a voltage detection signal receiving end and a corresponding voltage threshold.

Description

Technical Field

[0001] The present invention mainly relates to the field of cash register equipment, and in particular to a cash register cash box interface detection and driving device. Background Art

[0002] In some cash register scenarios, the cash drawer is an integral component of the cash register. However, commercially available cash registers often lack fault detection capabilities for the cash drawer interface. If the cash drawer connected to the cash register is damaged or the user incorrectly plugs in the external device, the cash register host cannot receive the relevant signal and can only passively receive instructions and activate the cash drawer driver circuit. If a short circuit occurs between the cash drawer interfaces, the cash drawer driver may fail, potentially damaging the cash register or cash drawer circuit board. In some cases, the solenoid valve inside the cash drawer may overheat and burn out due to prolonged power flow. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a cashier cash box interface detection and driving device to achieve safe and effective driving of the cashier cash box.

[0004] In order to solve the above technical problems, the present invention provides a cashier cashbox interface detection and drive device, the cashier cashbox includes multiple interfaces, the cashier cashbox interface detection and drive device includes: multiple interface detection modules and interface drive modules, each of the interfaces of the cashier cashbox is connected to a corresponding interface detection module and interface drive module; a first detection switch module has a first end, a second end and a first switch group corresponding to the multiple interface detection modules, the first end is connected to a first resistor and a voltage detection end, the second end is connected to the first end of the multiple interface detection modules, and the second ends of the multiple interface detection modules are respectively connected to the interfaces corresponding to the cashier cashbox; the first resistor is connected to the second end. A power signal; a second detection switch module, having a third end, a fourth end and a second switch group corresponding to the multiple interface detection modules, the third end being connected to the first end of the multiple interface detection modules, and the fourth end being connected to a second resistor; a main controller, comprising a detection switch module control end and a voltage detection signal receiving end; wherein the main controller is configured to: control the switches in the first switch group and the second switch group corresponding to any two different interfaces among the multiple interfaces to be turned on and off at the same time through the detection switch module control end; and output the result of the cashier cash box interface detection based on the comparison of the voltage detection signal received by the voltage detection signal receiving end with the corresponding voltage threshold.

[0005] In one embodiment of the present invention, the cashier cashbox interface detection and driving device also includes a driving module having a driving control signal output end, the driving control signal output end is connected to the first end of the interface driving module, and the second end of the interface driving module is respectively connected to the corresponding interface of the cashier cashbox.

[0006] In one embodiment of the present invention, the main controller also includes an interface detection module control end and an interface driver module control end; the interface detection module control end is used to enable the interface detection module; the interface driver module control end is used to enable the interface driver module; the main controller is configured to perform the following steps: enable the interface detection module through the interface detection module control end; control the switches in the first switch group and the second switch group corresponding to any two different interfaces among the multiple interfaces to be turned on and off at the same time through the detection switch module control end; output the result of the cashier cash box interface detection based on the comparison of the voltage detection signal received by the voltage detection signal receiving end with the corresponding voltage threshold; if the cashier cash box interface detection result is fault-free, the interface driver module control end is used to enable the interface driver module.

[0007] In one embodiment of the present invention, the main controller further includes a driving control terminal connected to the driving module and configured to provide a driving control signal to the driving module.

[0008] In one embodiment of the present invention, the multiple interfaces of the cashier cashbox include a cashier cashbox shell grounding signal interface, a cashier cashbox solenoid valve negative signal interface, a cashier cashbox solenoid valve positive signal interface, a cashier cashbox opening status indication signal interface, and a grounding interface corresponding to the cashier cashbox opening status indication signal.

[0009] In one embodiment of the present invention, when the interface of the cashier cashbox is the cashier cashbox shell grounding signal interface, the cashier cashbox solenoid valve negative pole signal interface and the cashier cashbox opening status indication signal corresponding grounding interface, the interface driving module includes a first transistor, the control end of the first transistor serves as the enable signal receiving end of the interface driving module, and the control end of the first transistor is also grounded through a third resistor; the first connection end of the first transistor is connected to the interface corresponding to the interface detection module, and the second connection end of the first transistor is grounded and serves as the drive control signal connection end.

[0010] In one embodiment of the present invention, when the interface of the cashier cashbox is the cashier cashbox shell grounding signal interface, the cashier cashbox solenoid valve negative pole signal interface and the cashier cashbox opening status indication signal corresponding grounding interface, the interface detection module includes a second transistor and a third transistor, the control end of the second transistor serves as the enable signal receiving end of the interface detection module, the control end of the third transistor is connected to the first connection end of the second transistor through the fifth resistor, and the second connection end of the second transistor is grounded; the first connection end of the third transistor is connected to the second end of the first detection switch module and the third end of the second detection switch module, and the second connection end of the third transistor is connected to the interface corresponding to the interface detection module.

[0011] In one embodiment of the present invention, when the interface of the cashier cashbox is a cashier cashbox opening status indication signal interface, the interface driving module includes a fourth transistor and a fifth transistor, the control end of the fourth transistor serves as an enable signal receiving end of the interface driving module, the control end of the fifth transistor is connected to the first connection end of the fourth transistor through a sixth resistor, and the second connection end of the fourth transistor is grounded; the first connection end of the fifth transistor is connected to the second power supply signal and serves as a drive control signal connection end, and the second connection end of the fifth transistor is connected to the interface corresponding to the interface driving module.

[0012] In one embodiment of the present invention, when the interface of the cashier cashbox is a cashier cashbox opening status indication signal interface, the interface detection module includes a first connecting line, which connects the cashier cashbox opening status indication signal interface to the second end of the first detection switch module and the third end of the second detection switch module.

[0013] In one embodiment of the present invention, when the interface of the cashier cashbox is the positive signal interface of the solenoid valve of the cashier cashbox, the interface driving module includes a sixth transistor, a seventh transistor and an eighth transistor, the control end of the sixth transistor is connected to the first connection end of the seventh transistor through a seventh resistor, the first connection end of the sixth transistor serves as the drive control signal connection end, and the second connection end of the sixth transistor is connected to the interface corresponding to the interface driving module; the control end of the seventh transistor is connected to the control end of the eighth transistor, and the second connection end of the seventh transistor and the second connection end of the eighth transistor are grounded; the connection end formed by the control end of the seventh transistor after passing through the double diode and the first filter capacitor serves as the enable signal receiving end of the interface driving module.

[0014] In one embodiment of the present invention, when the interface of the cashier cashbox is the positive signal interface of the solenoid valve of the cashier cashbox, the interface detection module includes a ninth transistor and a tenth transistor, the control end of the ninth transistor serves as the enable signal receiving end of the interface detection module, the control end of the tenth transistor is connected to the first connection end of the ninth transistor through the eighth resistor, and the second connection end of the ninth transistor is grounded; the control end of the ninth transistor is also connected to the first connection end of the eighth transistor; the first connection end of the tenth transistor is connected to the interface corresponding to the interface detection module, and the second connection end of the tenth transistor is connected to the second end of the first detection switch module and the third end of the second detection switch module.

[0015] In one embodiment of the present invention, an electromagnetic coil is included between the positive pole and the negative pole of the cash drawer electromagnetic valve, and the electromagnetic coil generates electromagnetic force when the electromagnetic valve module is energized.

[0016] In one embodiment of the present invention, the cashier cashbox has a latch mechanism, and the solenoid valve cooperates with the latch mechanism to drive the latch mechanism through electromagnetic force to open the cashier cashbox.

[0017] Compared with the prior art, the present invention has the following advantages: the technical solution of the present application realizes the coordinated operation of the interface detection and interface driving functions of the cashier cash box through the separate setting and coordinated use of the switch detection module, the interface detection module and the interface driving module, thereby realizing the safe and effective driving of the cashier cash box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are provided to provide a further understanding of the present application. They are included in and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0019] In the attached figure:

[0020] Figure 1 This is a schematic diagram of the composition of a cash drawer interface detection and drive device according to an embodiment of the present application.

[0021] Figure 2 Schematic diagram of the composition of the interface driver module according to an embodiment of the present application.

[0022] Figure 3 This is a schematic diagram of the composition of an interface detection module according to an embodiment of the present application.

[0023] Figure 4 It is a schematic diagram of the composition of an interface driver module according to another embodiment of the present application.

[0024] Figure 5It is a schematic diagram of the composition of the interface driver module and the interface detection module of another embodiment of the present application.

[0025] Figure 6 This is a schematic diagram of the composition of a cash drawer interface detection and drive device according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are merely examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without inventive effort. Unless otherwise apparent from the context or otherwise noted, the same reference numerals in the figures represent the same structure or operation.

[0027] As used in this application and the claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not intended to refer to the singular but may include the plural. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements.

[0028] Unless otherwise specifically stated, the relative arrangement of the components and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of this application. Meanwhile, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0029] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is solely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. Furthermore, while the terms used in this application are selected from commonly known and commonly used terms, some terms mentioned in this specification may have been selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant sections of this description. Furthermore, this application should be understood not only by the actual terms used, but also by the meaning implied by each term.

[0030] It should be understood that when a component is referred to as being “connected to,” “coupled to,” or “contacting” another component, it can be directly on, connected to, coupled to, or contacting the other component, or intervening components may be present. In contrast, when a component is referred to as being “directly on,” “directly connected to,” “directly coupled to,” or “directly contacting” another component, there are no intervening components. Similarly, when a first component is referred to as being “electrically contacting” or “electrically coupled to” a second component, an electrical path exists between the first and second components that allows current to flow. This electrical path may include capacitors, coupled inductors, and / or other components that allow current to flow, even without direct contact between the conductive components.

[0031] The embodiments of the present application describe a cash drawer interface detection and driving device.

[0032] Figure 1 FIG. 1 is a schematic diagram of the cash drawer interface detection and driving device 100 according to an embodiment of the present application. Figure 1 As shown, the cashier cash box interface detection and driving device 100 includes multiple interface detection modules and interface driving modules (such as Figure 1 108 in the box), the first detection switch module 105, the second detection switch module 106 and the main controller 101. The cashier cash box 102 includes multiple interfaces, Figure 1 The first to sixth interfaces (Pin1, Pin2, Pin3, Pin4, Pin5 and Pin6) are shown.

[0033] In some embodiments, the multiple interfaces of the cashier cashbox include a cashier cashbox housing ground signal interface, a cashier cashbox solenoid valve negative pole signal interface, a cashier cashbox solenoid valve positive pole signal interface, a cashier cashbox opening status indication signal interface, and a ground interface corresponding to the cashier cashbox opening status indication signal. For example, Pin 1 is the cashier cashbox housing ground signal interface, Pin 2 is the cashier cashbox solenoid valve negative pole signal interface, Pin 3 is the cashier cashbox opening status indication signal interface, Pin 4 is the cashier cashbox solenoid valve positive pole signal interface, Pin 5 is the cashier cashbox solenoid valve negative pole signal backup interface (for example, enabled when using a double-layer cashbox), and Pin 6 is the ground interface corresponding to the cashier cashbox opening status indication signal.

[0034] Each interface of the cash drawer is connected to a corresponding interface detection module and interface driver module. For example, the first interface Pin1 is connected to the first interface detection module 121 and the first interface driver module 122, the second interface Pin2 is connected to the second interface detection module 123 and the second interface driver module 124, the third interface Pin3 is connected to the first interface detection module 125 and the first interface driver module 126, the fourth interface Pin4 is connected to the fourth interface detection module 127 and the fourth interface driver module 128, the fifth interface Pin5 is connected to the fifth interface detection module 129 and the fifth interface driver module 130, and the sixth interface Pin6 is connected to the sixth interface detection module 131 and the sixth interface driver module 132.

[0035] The first detection switch module 105 has a first end 115, a second end 116, and a first switch group corresponding to multiple interface detection modules. The first switch group, for example, includes a first switch S1, a second switch S2, a third switch S3, a fourth switch S4, a fifth switch S5, and a sixth switch S6. Each switch in the first switch group has a corresponding switch control terminal (Select_Pin1, Select_Pin2, Select_Pin3, Select_Pin4, Select_Pin5, Select_Pin6). The first end 115 of the first detection switch module 105 is connected to a first resistor R1 and a voltage detection terminal V_Check. The second end 116 of the first detection switch module 105 is connected to the first end 119 of the multiple interface detection modules, and the second ends 120 of the multiple interface detection modules are respectively connected to the corresponding interfaces (Pin1, Pin2, Pin3, Pin4, Pin5, or Pin6) of the cashier cash box 102. The first resistor R1 is connected to a first power supply signal VDD.

[0036] The second detection switch module 106 has a third terminal 117, a fourth terminal 118, and a second switch group corresponding to the multiple interface detection modules. The third terminal 117 of the second detection switch module 106 is connected to the first terminals 119 of the multiple interface detection modules, and the fourth terminal 118 of the second detection switch module 106 is connected to a second resistor R2. The second switch group includes, for example, a seventh switch S7, an eighth switch S8, a ninth switch S9, a tenth switch S10, an eleventh switch S11, and a twelfth switch S12. Each switch in the second switch group has a corresponding switch control terminal (Select_Pin7, Select_Pin8, Select_Pin9, Select_Pin10, Select_Pin11, Select_Pin12). The second terminal of the second resistor is, for example, connected to ground GND or a fixed voltage.

[0037] The main controller 101 includes a detection switch module control terminal 133 and a voltage detection signal receiving terminal 134. The main controller 101 is configured to: control the switches in the first switch group and the second switch group corresponding to any two different interfaces of the multiple interfaces to be turned on and off simultaneously through the detection switch module control terminal 133, specifically, for example, Figure 1 The main controller 101 is further configured to output the cash drawer interface detection result based on the comparison between the voltage detection signal V_Check1 received by the voltage detection signal receiving terminal 134 and the corresponding voltage threshold Th1.

[0038] In one embodiment, for example, to detect whether there is a short circuit fault between the first interface Pin1 and the third interface Pin3, the detection switch module control terminal 133 controls the first switch S1 corresponding to the first interface Pin1 in the first switch group and the ninth switch S9 corresponding to the third interface Pin3 in the second switch group to be turned on and off at the same time (correspondingly connecting the first interface switch signal connection terminal Pin1_Switch and the third interface switch signal connection terminal Pin3_Switch), specifically by Figure 1 The Select_Pin[1:12] signals indicated in the figure are used to turn on and off the corresponding switches in the first and second switch groups. When the first switch S1 and the ninth switch S9 are simultaneously turned on, if the first interface Pin1 and the third interface Pin3 are in a short-circuit (i.e., directly connected) state, a current path will be formed from the first power connection signal VDD to the first resistor R1 and the second resistor R2. When the second end of the second resistor R2 is connected to the ground GND, the voltage value detected by the voltage detection terminal V_Check will change from the value corresponding to the first power connection signal VDD (e.g., VDD1) to V_Check1 = VDD1*R2 / (R1+R2). The voltage detection signal V_Check1 received by the voltage detection terminal V_Check is compared with the corresponding voltage threshold Th1. If the difference is less than a specific value △, it is determined that a short circuit fault exists between the first interface Pin1 and the third interface Pin3 of the cash drawer. If the voltage detection signal V_Check1 received by the voltage detection terminal V_Check is still the same as or close to the value corresponding to the first power connection signal VDD (eg, VDD1 ), it is determined that there is no short circuit fault between the first interface Pin1 and the third interface Pin3 of the cash drawer.

[0039] In some embodiments, the cash drawer interface detection and drive device 100 further includes a drive module 103. The drive module 103 has a drive control signal output terminal 141. The drive control signal output terminal 141 is connected to a first terminal 142 of the interface driver module, and the corresponding first drive signal (Pin1_Driver) to the sixth drive signal (Pin6_Driver) are generated. The second terminal 143 of the interface driver module is respectively connected to the corresponding interface (Pin1, Pin2, Pin3, Pin4, Pin5, or Pin6) of the cash drawer 102.

[0040] The main controller 101 also includes an interface detection module control terminal 145 and an interface driver module control terminal 146. The interface detection module control terminal 145 is used to enable the interface detection module, specifically through the E_Check_Pin[1:6] signal control. The interface driver module control terminal 146 is used to enable the interface driver module, specifically through the E_Driver_Pin[1:6] signal control. In some embodiments, the main controller also includes a driver control terminal connected to the driver module for providing a drive control signal sg to the driver module. In some embodiments, the main controller is configured to perform the following steps: Step 701, enabling the interface detection module via the interface detection module control terminal; Step 702, controlling the switches in the first and second switch groups corresponding to any two different interfaces among the multiple interfaces to simultaneously turn on and off via the detection switch module control terminal; Step 703, outputting the cash drawer interface detection result based on a comparison of the voltage detection signal received by the voltage detection signal receiving terminal with the corresponding voltage threshold; Step 704, if the cash drawer interface detection result is normal, enabling the interface driver module via the interface driver module control terminal.

[0041] Figure 2 This is a schematic diagram of the composition of the interface driver module of an embodiment of the present application. Figure 2In some embodiments, when the interface of the cashier cashbox is the cashier cashbox shell ground signal interface, the cashier cashbox solenoid valve negative pole signal interface, and the cashier cashbox opening status indication signal corresponding ground interface, the interface driver module 200 includes a first transistor M1, and the control end 201 of the first transistor M1 serves as the enable signal receiving end of the interface driver module (E_Driver_Pin1 / Pin2 / … / Pin6, marked E_Driver_Pin1 or E_Driver_Pin2 or…or E_Driver_Pin6), and the control end of the first transistor is also grounded to GND through the third resistor R3. The first connection terminal 202 of the first transistor M1 is connected to the interface (Pin1 / Pin2 / … / Pin6, marked as Pin1 or Pin2 or…or Pin6) corresponding to the interface detection module, and the second connection terminal 203 of the first transistor M1 is grounded and serves as a drive control signal connection terminal (Pin1 / Pin2 / … / Pin6_Driver, marked as Pin1_Driver or Pin2_Driver or…or Pin6_Driver).

[0042] Figure 3 This is a schematic diagram of the composition of the interface detection module of an embodiment of the present application. Figure 3 In some embodiments, when the interface of the cashier cashbox is the cashier cashbox shell ground signal interface, the cashier cashbox solenoid valve negative pole signal interface, and the cashier cashbox opening status indication signal corresponding ground interface, the interface detection module 300 includes a second transistor M2 and a third transistor M3, and the control end 301 of the second transistor M2 serves as the enable signal receiving end of the interface detection module (E_Check_Pin1 / Pin2 / … / Pin6, marked E_Check_Pin1 or E_Check_Pin2 or…or E_Check_Pin6), the control end 305 of the third transistor M3 is connected to the first connection end 302 of the second transistor M2 through the fifth resistor R5, and the second connection end 303 of the second transistor M2 is grounded GND. The first connection terminal 306 of the third transistor M3 is connected to the second terminal of the first detection switch module and the third terminal of the second detection switch module. That is, the first connection terminal 306 of the third transistor M3 serves as the interface switch signal connection terminal Pin1 / Pin2 / … / Pin6_Switch (labeled Pin1_Switch or Pin2_Switch or Pin3_Switch or…or Pin6_Switch). The second connection terminal of the third transistor M3 is connected to the interface corresponding to the interface detection module (Pin1 / Pin2 / … / Pin6, labeled Pin1 or Pin2 or…or Pin6).

[0043] Figure 4 This is a schematic diagram of the composition of the interface driver module of another embodiment of the present application. Figure 4 In some embodiments, when the interface of the cashier cash drawer is a cashier cash drawer opening status indication signal interface, the interface driver module 400 includes a fourth transistor M4 and a fifth transistor M5, and the control end 401 of the fourth transistor M4 serves as an enable signal receiving end of the interface driver module (E_Driver_Pin1 / Pin2 / … / Pin6, marked E_Driver_Pin1 or E_Driver_Pin2 or…or E_Driver_Pin6), and the control end 405 of the fifth transistor M5 is connected to the first connection end 402 of the fourth transistor M4 through the sixth resistor R6, and the second connection end 403 of the fourth transistor M4 is grounded GND. The first connection terminal 406 of the fifth transistor M5 is connected to the second power supply signal VCC and serves as a drive control signal connection terminal (Pin1 / Pin2 / … / Pin6_Driver, labeled Pin1_Driver or Pin2_Driver or…or Pin6_Driver), and the second connection terminal 407 of the fifth transistor M5 is connected to the interface (Pin1 / Pin2 / … / Pin6, labeled Pin1 or Pin2 or…or Pin6) corresponding to the interface driver module.

[0044] When the interface of the cashier cashbox is a cashier cashbox opening status indication signal interface, the interface detection module includes a first connecting line, which connects the cashier cashbox opening status indication signal interface to the second end of the first detection switch module and the third end of the second detection switch module, that is, the first connecting line connects the cashier cashbox opening status indication signal interface to the interface switch signal connection end Pin1 / Pin2 / … / Pin6_Switch (marked Pin1_Switch or Pin2_Switch or Pin3_Switch or…or Pin6_Switch).

[0045] Figure 5 FIG. 1 is a schematic diagram of the composition of an interface driver module and an interface detection module according to another embodiment of the present application. Figure 5When the interface of the cashier cashbox is the positive signal interface of the solenoid valve of the cashier cashbox, the interface driver module includes a sixth transistor M6, a seventh transistor M7, and an eighth transistor M8. The control end 501 of the sixth transistor M6 is connected to the first connection end 505 of the seventh transistor M7 through the seventh resistor R7. The first connection end 502 of the sixth transistor M6 serves as a drive control signal connection end (Pin1 / Pin2 / … / Pin6_Driver, marked as Pin1_Driver or Pin2_Driver or…or Pin6_Driver). The second connection end 503 of the sixth transistor M6 is connected to the corresponding interface (Pin1 / Pin2 / … / Pin6, marked as Pin1 or Pin2 or…or Pin6) of the interface driver module. The control terminal 504 of the seventh transistor M7 is connected to the control terminal 507 of the eighth transistor M8, and the second connection terminal 506 of the seventh transistor M7 and the second connection terminal 509 of the eighth transistor M8 are grounded. The connection terminal formed by the control terminal 504 of the seventh transistor M7 through the dual diode D1 and the first filter capacitor C1 serves as the enable signal receiving terminal (E_Driver_Pin1 / Pin2 / … / Pin6, marked E_Driver_Pin1 or E_Driver_Pin2 or…or E_Driver_Pin6) of the interface driver module.

[0046] When the cashier's interface is the positive signal interface of the cashier's solenoid valve, the interface detection module includes a ninth transistor M9 and a tenth transistor M10. The control terminal 601 of the ninth transistor M9 serves as the enable signal receiving terminal (E_Check_Pin1 / Pin2 / … / Pin6, labeled E_Check_Pin1 or E_Check_Pin2 or… or E_Check_Pin6) of the interface detection module. The control terminal 605 of the tenth transistor M10 is connected to the first connection terminal 602 of the ninth transistor M9 via the eighth resistor R8. The second connection terminal 603 of the ninth transistor M9 is grounded. The control terminal 601 of the ninth transistor M9 is also connected to the first connection terminal 508 of the eighth transistor M8. The first connection terminal 606 of the tenth transistor M10 is connected to the interface (Pin1 / Pin2 / … / Pin6, marked as Pin1 or Pin2 or…or Pin6) corresponding to the interface detection module, and the second connection terminal 607 of the tenth transistor M10 is connected to the second end of the first detection switch module and the third end of the second detection switch module, that is, the second connection terminal 607 of the tenth transistor M10 serves as the interface switch signal connection terminal Pin1 / Pin2 / … / Pin6_Switch (marked as Pin1_Switch or Pin2_Switch or Pin3_Switch or…or Pin6_Switch).

[0047] The interface detection module and the interface driver module also include several functional components to enable the transistor to meet the set working conditions, such as Figure 3 The filter capacitor C7 and current limiting resistor R26 in the circuit; Figure 4 The filter capacitor C8 and current limiting resistor R27 in the circuit; Figure 5 The filter capacitor C9, current limiting resistor R35, filter capacitor C10 and current limiting resistor R30, etc.

[0048] In some embodiments, an electromagnetic coil is included between the positive pole and the negative pole of the cash drawer electromagnetic valve, and the electromagnetic coil generates electromagnetic force when the electromagnetic valve module is energized. Figure 6 1 is a schematic diagram of the cash drawer interface detection and driving device 100 according to an embodiment of the present application. Figure 6 The electromagnetic coil between the positive and negative poles of the cashier's solenoid valve has an equivalent impedance of Rd. Therefore, when the two interfaces being tested are the interfaces corresponding to the positive and negative poles of the cashier's solenoid valve, respectively, the voltage detection signal V_Check1 received by the voltage detection terminal V_Check is compared with the corresponding second voltage threshold Th2 and outputs the cashier's interface detection result. Therefore, if there is no short circuit between the interfaces corresponding to the positive and negative poles of the cashier's solenoid valve, V_Check1 = VDD * (R2 + Rd) / (R1 + R2 + Rd). If there is a short circuit between the interfaces corresponding to the positive and negative poles of the cashier's solenoid valve, V_Check1 = VDD * R2 / (R1 + R2). Therefore, the voltage threshold used for comparison with the voltage detection signal V_Check1 is adjusted to the second voltage threshold Th2, thereby adapting to the detection status of the interface.

[0049] In some embodiments, the cashier cashbox has a latch mechanism, and the solenoid valve cooperates with the latch mechanism to drive the latch mechanism through electromagnetic force to open the cashier cashbox.

[0050] The cashier cashbox interface detection and drive device of the present application realizes the coordinated operation of the interface detection and interface drive functions of the cashier cashbox through the separate setting and coordinated control operation of the switch detection module, the interface detection module and the interface drive module, thereby realizing the safe and effective drive of the cashier cashbox.

[0051] Some aspects of the present application may be performed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The above hardware or software may be referred to as a "data block," "module," "engine," "unit," "component," or "system." The processor may be one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DAPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or combinations thereof.

[0052] Similarly, it should be noted that, in order to simplify the presentation of this application and thus facilitate understanding of one or more embodiments of the invention, the foregoing descriptions of the embodiments of this application sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of this application requires more features than those recited in the claims. In fact, an embodiment may have fewer features than all of the features of a single embodiment disclosed above.

[0053] In some embodiments, numbers are used to describe the quantity of components and attributes. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise stated, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the settings of such numerical values ​​are as accurate as possible within the feasible range.

[0054] Although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions can be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A cashier cashbox interface detection and drive device, the cashier cashbox including multiple interfaces, the cashier cashbox interface detection and drive device comprising: Multiple interface detection modules and interface driver modules, each interface of the cashier cash box is connected to a corresponding interface detection module and interface driver module; A first detection switch module having a first end, a second end, and a first switch group corresponding to the multiple interface detection modules, wherein the first end is connected to a first resistor and a voltage detection end, the second end is connected to the first ends of the multiple interface detection modules, and the second ends of the multiple interface detection modules are respectively connected to the interfaces corresponding to the cash drawer; the first resistor is connected to a first power signal; a second detection switch module having a third end, a fourth end, and a second switch group corresponding to the plurality of interface detection modules, the third end being connected to the first ends of the plurality of interface detection modules, and the fourth end being connected to a second resistor; A main controller, comprising a detection switch module control terminal and a voltage detection signal receiving terminal; The main controller is configured to: control the switches in the first switch group and the second switch group corresponding to any two different interfaces of the multiple interfaces to be turned on and off simultaneously by detecting the control end of the switch module; The result of the cashier cash box interface detection is output based on the comparison between the voltage detection signal received by the voltage detection signal receiving end and the corresponding voltage threshold.

2. The cash drawer interface detection and driving device according to claim 1, characterized in that: It also includes a driving module having a driving control signal output end, the driving control signal output end is connected to the first end of the interface driving module, and the second end of the interface driving module is respectively connected to the interface corresponding to the cashier cash box.

3. The cash drawer interface detection and driving device according to claim 1, characterized in that: The main controller also includes an interface detection module control end and an interface drive module control end; The interface detection module control terminal is used to enable the interface detection module; the interface driver module control terminal is used to enable the interface driver module; The main controller is configured to perform the following steps: Enable the interface detection module through the interface detection module control terminal; Controlling the switches in the first switch group and the second switch group corresponding to any two different interfaces among the multiple interfaces to be turned on and off simultaneously by the control end of the detection switch module; Outputting the result of the cash drawer interface detection according to the comparison between the voltage detection signal received by the voltage detection signal receiving end and the corresponding voltage threshold; If the cashier cash box interface detection result shows no fault, the interface driver module control terminal is used to enable the interface driver module.

4. The cash drawer interface detection and driving device according to claim 2, characterized in that: The main controller further includes a driving control terminal connected to the driving module and configured to provide a driving control signal to the driving module.

5. The cash drawer interface detection and driving device according to claim 1, characterized in that: The multiple interfaces of the cashier cashbox include a cashier cashbox shell grounding signal interface, a cashier cashbox solenoid valve negative pole signal interface, a cashier cashbox solenoid valve positive pole signal interface, a cashier cashbox opening status indication signal interface and a grounding interface corresponding to the cashier cashbox opening status indication signal.

6. The cash drawer interface detection and driving device according to claim 5, characterized in that: When the interface of the cashier cash box is the cashier cash box shell grounding signal interface, the cashier cash box solenoid valve negative signal interface and the cashier cash box opening state indication signal corresponding grounding interface, The interface driving module includes a first transistor, the control end of the first transistor serves as an enable signal receiving end of the interface driving module, and the control end of the first transistor is also grounded through a third resistor; the first connection end of the first transistor is connected to the interface corresponding to the interface detection module, and the second connection end of the first transistor is grounded and serves as a drive control signal connection end.

7. The cash drawer interface detection and driving device according to claim 5, characterized in that: When the interface of the cashier cash box is the cashier cash box shell grounding signal interface, the cashier cash box solenoid valve negative signal interface and the cashier cash box opening state indication signal corresponding grounding interface, The interface detection module includes a second transistor and a third transistor, the control end of the second transistor serves as an enable signal receiving end of the interface detection module, the control end of the third transistor is connected to the first connection end of the second transistor through a fifth resistor, and the second connection end of the second transistor is grounded; The first connection end of the third transistor is connected to the second end of the first detection switch module and the third end of the second detection switch module, and the second connection end of the third transistor is connected to the interface corresponding to the interface detection module.

8. The cash drawer interface detection and driving device according to claim 5, characterized in that: When the cashier cash box interface is a cashier cash box opening status indication signal interface, The interface driver module includes a fourth transistor and a fifth transistor, the control end of the fourth transistor serves as an enable signal receiving end of the interface driver module, the control end of the fifth transistor is connected to the first connection end of the fourth transistor through a sixth resistor, and the second connection end of the fourth transistor is grounded; The first connection end of the fifth transistor is connected to the second power supply signal and serves as a driving control signal connection end, and the second connection end of the fifth transistor is connected to the interface corresponding to the interface driving module.

9. The cash drawer interface detection and driving device according to claim 5, characterized in that: When the cashier cash box interface is a cashier cash box opening status indication signal interface, The interface detection module includes a first connection line, which connects the cash drawer opening state indication signal interface to the second end of the first detection switch module and the third end of the second detection switch module.

10. The cash drawer interface detection and driving device according to claim 5, characterized in that: When the interface of the cashier cash box is the positive signal interface of the solenoid valve of the cashier cash box, The interface driver module includes a sixth transistor, a seventh transistor and an eighth transistor. The control end of the sixth transistor is connected to the first connection end of the seventh transistor through a seventh resistor. The first connection end of the sixth transistor serves as a drive control signal connection end, and the second connection end of the sixth transistor is connected to the interface corresponding to the interface driver module; the control end of the seventh transistor is connected to the control end of the eighth transistor, and the second connection end of the seventh transistor and the second connection end of the eighth transistor are grounded; the connection end formed by the control end of the seventh transistor after passing through the double diode and the first filter capacitor serves as the enable signal receiving end of the interface driver module.

11. The cash drawer interface detection and driving device according to claim 10, characterized in that: When the interface of the cashier cash box is the positive signal interface of the solenoid valve of the cashier cash box, The interface detection module includes a ninth transistor and a tenth transistor, wherein the control terminal of the ninth transistor serves as an enable signal receiving terminal of the interface detection module, the control terminal of the tenth transistor is connected to the first connection terminal of the ninth transistor via an eighth resistor, and the second connection terminal of the ninth transistor is grounded; The control end of the ninth transistor is also connected to the first connection end of the eighth transistor; the first connection end of the tenth transistor is connected to the interface corresponding to the interface detection module, and the second connection end of the tenth transistor is connected to the second end of the first detection switch module and the third end of the second detection switch module.

12. The cash drawer interface detection and driving device according to claim 5, characterized in that: An electromagnetic coil is included between the positive pole and the negative pole of the cash drawer electromagnetic valve, and the electromagnetic coil generates electromagnetic force when the electromagnetic valve module is energized.

13. The cash drawer interface detection and driving device according to claim 12, characterized in that: The cashier cash box has a latch mechanism, and the solenoid valve cooperates with the latch mechanism to drive the latch mechanism through electromagnetic force to open the cashier cash box.

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