CN220913649U - Scanning peripheral circuit and device - Google Patents
Scanning peripheral circuit and device Download PDFInfo
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- CN220913649U CN220913649U CN202322900239.1U CN202322900239U CN220913649U CN 220913649 U CN220913649 U CN 220913649U CN 202322900239 U CN202322900239 U CN 202322900239U CN 220913649 U CN220913649 U CN 220913649U
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- 230000002093 peripheral effect Effects 0.000 title claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims description 33
- 239000003990 capacitor Substances 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model discloses a scanning peripheral circuit and a device, which are used for a mobile terminal, wherein the circuit comprises: the device comprises a scanning unit, a key reading unit, a main control unit electrically connected with the scanning unit and the key reading unit, an interface unit electrically connected with the scanning unit, the key reading unit and the main control unit, and a mode switching unit electrically connected with the interface unit. The utility model can add the function of scanning bar codes to the mobile terminal and has the advantages of simple circuit structure and low cost.
Description
Technical Field
The utility model relates to the technical field of bar code scanning, in particular to a scanning peripheral circuit and a scanning peripheral device.
Background
In the related art, most bar code scanning devices are connected by using wireless communication modes such as bluetooth communication or special host equipment, so that there are many limitations, such as products connected by using wireless communication modes, that the problem of field power supply needs to be considered, devices matched with the host equipment need to often carry the host equipment to operate, the user experience is poor, the defects of complex circuit structure and high cost exist, and the mobile terminals on the market at present also lack bar code scanning functions.
Disclosure of utility model
The utility model aims to provide a scanning peripheral circuit and a device. The technical scheme adopted for solving the technical problems is as follows: a scan peripheral circuit is configured for a mobile terminal, comprising:
A scanning unit for scanning bar code information;
A key reading unit for reading key information serving as encrypted bar code information;
the main control unit is electrically connected with the scanning unit and the key reading unit and is used for transmitting the encrypted bar code information to the mobile terminal;
the interface unit is electrically connected with the scanning unit, the key reading unit and the main control unit, and is used for being electrically connected with the mobile terminal so as to enable the main control unit to be in communication connection with the mobile terminal, and taking electricity from the mobile terminal to the scanning unit, the key reading unit and the main control unit; and
And the mode switching unit is electrically connected with the interface unit and used for setting the mobile terminal into HOST mode.
Preferably, the scan peripheral circuit further comprises:
The communication protocol conversion unit is electrically connected with the interface unit and the main control unit; and/or
And the voltage conversion unit is electrically connected with the interface unit and the main control unit and is used for performing voltage conversion on the power supply voltage output by the mobile terminal and supplying power to the main control unit.
Preferably, the communication protocol conversion unit comprises a USB to serial chip U1; the USB communication end of the USB-to-serial port chip U1 is electrically connected with the interface unit, and the serial port communication end of the USB-to-serial port chip U1 is electrically connected with the main control unit.
Preferably, the voltage conversion unit includes a linear regulator U4; the input end of the linear voltage stabilizer U4 is electrically connected with the power supply voltage output end of the interface unit, and the output end of the linear voltage stabilizer U4 is electrically connected with the main control unit.
Preferably, the interface unit comprises a TypeC connector, and the mode switching unit comprises a first resistor R1;
The utility model discloses a mobile terminal, including the power end, the USB communication end and the mode setting end that the typeC connects, the power end that typeC connects is used for the power supply voltage output end electricity of interface unit connects scanning unit, key reading unit, main control unit, communication protocol conversion unit and voltage conversion unit, the USB communication end electricity that typeC connects is connected communication protocol conversion unit, the mode setting end that typeC connects is through first resistance R1 electricity is connected to ground.
Preferably, the scanning unit includes:
the scanner U3 is electrically connected with the main control unit and the interface unit and is used for scanning the bar code information; and
And the scanner opening and closing control unit is electrically connected with the main control unit and used for controlling the scanner U3 to be started or closed according to the operation of a user.
Preferably, the scanner on-off control unit comprises a key K1, a third resistor R3 and a third capacitor C3;
The first contact of the key K1 is electrically connected with the second end of the third resistor R3, the first end of the third resistor R3 is electrically connected with the main control unit, the first end of the third resistor R3 is also electrically connected to the ground through the third capacitor C3, and the second contact of the key K1 is grounded.
Preferably, the key reading unit includes a PSAM card slot communicatively connected to the main control unit.
Preferably, the key reading unit further includes:
An electrostatic protection unit electrically connected with the PSAM clamping groove; and
And the filtering unit is electrically connected with the PSAM clamping groove and used for preventing communication signals between the PSAM clamping groove and the main control unit from being filtered.
The utility model also constructs a scanning peripheral device for a mobile terminal, comprising the scanning peripheral circuit.
The utility model has the following beneficial effects: providing a scanning peripheral circuit; the mobile terminal can be connected with the mobile terminal through the interface unit, then the scanning unit scans the bar code information, the key reading unit reads the key information used as the encrypted bar code information, and the mode switching unit sets the mobile terminal to HOST mode, so that the scanning unit, the key reading unit and the main control unit can take electricity from the mobile terminal, and the main control unit also establishes communication connection with the mobile terminal through the interface unit, so that the main control unit can transmit the encrypted bar code information to the mobile terminal; the utility model can add the function of scanning bar codes to the mobile terminal and take electricity from the mobile terminal, and has the advantages of simple circuit structure and low cost.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a circuit block diagram of a scan peripheral circuit in some embodiments of the utility model;
FIG. 2 is a schematic circuit diagram of a communication protocol conversion unit in some embodiments of the utility model;
FIG. 3 is a schematic circuit diagram of a voltage conversion unit in some embodiments of the utility model;
FIG. 4 is a schematic circuit diagram of an interface unit and a mode switching unit in some embodiments of the utility model;
FIG. 5 is a schematic circuit diagram of scanner U3 in a scanner unit in some embodiments of the utility model;
FIG. 6 is a schematic circuit diagram of a scanner ON/OFF control unit in a scanner unit in some embodiments of the utility model;
FIG. 7 is a schematic circuit diagram of a key reading unit according to some embodiments of the present utility model;
Fig. 8 is a schematic circuit diagram of a master unit in some embodiments of the utility model.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
FIG. 1 is a circuit block diagram of a scan peripheral circuit in some embodiments of the utility model. The scanning peripheral circuit is suitable for the mobile terminal, and the mobile terminal is additionally provided with a bar code scanning function. As shown in fig. 1, the scan peripheral circuit includes a scan unit 1, a key reading unit 2, a main control unit 3, an interface unit 4, and a mode switching unit 5.
The scanning unit 1 is used for scanning bar code information. In particular, bar codes include, but are not limited to, anti-counterfeit bar codes, merchandise bar codes, and the like, which store other forms of information.
The key reading unit 2 is for reading key information serving as encrypted bar code information. Specifically, the key information is used for encrypting the bar code information so as to ensure the safety of information data and ensure the benefit of users.
The main control unit 3 is electrically connected with the scanning unit 1 and the key reading unit 2, and the main control unit 3 is used for transmitting the encrypted bar code information to the mobile terminal. Specifically, the main control unit 3 may encrypt the bar code information according to the key information based on the existing algorithm, and the encrypted bar code information will be transmitted to the mobile terminal.
The interface unit 4 is electrically connected with the scanning unit 1, the key reading unit 2 and the main control unit 3, and the interface unit 4 is used for being electrically connected with the mobile terminal so that the main control unit 3 and the mobile terminal are in communication connection, and electricity is taken from the mobile terminal to the scanning unit 1, the key reading unit 2 and the interface unit 4 of the main control unit 3. Specifically, the main control unit 3 is communicatively connected to the mobile terminal through the interface unit 4 to establish a data channel for transmitting bar code information, while the interface unit 4 also acquires a power supply voltage from the mobile terminal as a power supply source for the scanning unit 1, the key reading unit 2, and the main control unit 3.
The mode switching unit 5 is electrically connected to the interface unit 4, and the mode switching unit 5 is configured to set the mobile terminal to the mode switching unit 5 of HOST mode. Specifically, after the interface unit 4 establishes an electrical connection with the mobile terminal, the mobile terminal is set to the HOST mode (HOST mode) under the action of the mode switching unit 5, so that the mobile terminal can output a power supply voltage to the interface unit 4 and is in communication connection with the main control unit 3 through the interface unit 4.
Mobile terminals include, but are not limited to, cell phone terminals, tablet computers or notebook computers. In addition, the mobile terminal can utilize bar code information according to actual application requirements, for example, in a supermarket, the bar code stores commodity information, and the bar code information can be transmitted to a receipt and payment system of the supermarket through a network of the mobile terminal so as to carry out charge settlement work; for another example, the bar code stores anti-counterfeiting information, so that a network of the mobile terminal can log in a related anti-counterfeiting website or system of the anti-counterfeiting object to realize anti-counterfeiting verification.
Since some mobile terminals cannot directly communicate with the main control unit 3 due to different communication protocols, in some embodiments, as shown in fig. 1, the scan peripheral circuit further includes a communication protocol conversion unit 6. The communication protocol conversion unit 6 is electrically connected with the interface unit 4 and the main control unit 3. Specifically, the communication protocol conversion unit 6 is configured to implement communication protocol conversion between the mobile terminal and the main control unit 3, so that the mobile terminal and the main control unit 3 can normally communicate.
In some embodiments, as shown in fig. 2, the communication protocol conversion unit 6 includes a USB to serial chip U1. Specifically, referring to fig. 2 and 8, the USB communication end of the USB-to-serial chip U1 is electrically connected to the interface unit 4, the serial communication end of the USB-to-serial chip U1 is electrically connected to the main control unit 3, and the power supply end of the USB-to-serial chip U1 is connected to the power supply voltage output end of the interface unit 4.
In some embodiments, as shown in fig. 1, the scan peripheral circuit further comprises a voltage conversion unit 7. The voltage conversion unit 7 is electrically connected with the interface unit 4 and the main control unit 3. The voltage conversion unit 7 is configured to perform voltage conversion on a power supply voltage output by the mobile terminal, and supply power to the main control unit 3 through the converted dc voltage.
In some embodiments, as shown in fig. 3, the voltage conversion unit 7 includes a linear regulator U4, a second resistor R2, a first capacitor C1, and a second capacitor C2. Alternatively, the linear regulator U4 is a linear regulator model SGM 2019-3.3YN5G-TR.
Specifically, referring to fig. 3 and 8, the input end of the linear voltage regulator U4 is electrically connected to the power supply voltage output end of the interface unit 4, the output end of the linear voltage regulator U4 is electrically connected to the main control unit 3 to supply power to the main control unit 3, the second resistor R2 is connected in parallel with the enable end and the power supply end of the linear voltage regulator U4, the enable end of the linear voltage regulator U4 is further connected to ground via the first capacitor C1, and the feedback end of the linear voltage regulator U4 is connected to ground via the second capacitor C2. Wherein the first capacitor C1 and the second capacitor C2 play a filtering role.
In some embodiments, as shown in fig. 4, the interface unit 4 includes a TypeC connection 41, and the mode switching unit 5 includes a first resistor R1. Specifically, referring to fig. 4 and 8, the power supply end, the USB communication end, and the mode setting end of the TypeC connector 41 are used to electrically connect the mobile terminal, the power supply end of the TypeC connector 41 is electrically connected to the scanning unit 1, the key reading unit 2, the main control unit 3, the communication protocol conversion unit 6, and the voltage conversion unit 7 as the power supply voltage output end of the interface unit 4, the USB communication end of the TypeC connector 41 is electrically connected to the communication protocol conversion unit 6, and the mode setting end of the TypeC connector 41 is electrically connected to the ground via the first resistor R1.
In addition, the power supply end of the TypeC connector 41 includes a VBUS1 pin and a VBUS4 pin; the USB communication end of the TypeC connector 41 includes a d1+ pin, a d2+ pin, a D1-pin, and a D2-pin, where the d1+ pin and the d2+ pin are simultaneously electrically connected to a DP pin in the USB communication end of the communication protocol conversion unit 6 and are used to connect to a usb_dp end in the mobile terminal, and the D1-pin and the D2-pin are simultaneously electrically connected to a DM pin in the USB communication end of the communication protocol conversion unit 6 and are used to connect to a usb_dm end in the mobile terminal; the mode setting end of TypeC connector 41 includes a CC1 pin and a CC2 pin.
In some embodiments, the scanning unit 1 includes a scanner U3 as shown in fig. 5 and a scanner on-off control unit as shown in fig. 6. Wherein the scanner U3 may be a bar code scanner head of the prior art.
Specifically, referring to fig. 5, 6 and 8, a scanner U3 is electrically connected with the main control unit 3 and the interface unit 4, the scanner U3 being for scanning bar code information; the scanner on-off control unit is electrically connected with the main control unit 3 and is used for controlling the scanner U3 to be started or closed according to the operation of a user.
Further, in some embodiments, as shown in fig. 6, the scanner on-off control unit includes a key K1, a third resistor R3, and a third capacitor C3. Specifically, referring to fig. 6 and 8, the first contact of the key K1 is electrically connected to the second end of the third resistor R3, the first end of the third resistor R3 is electrically connected to the main control unit 3, the first end of the third resistor R3 is further electrically connected to ground via the third capacitor C3, and the second contact of the key K1 is grounded. In this embodiment, the user can set the level of the first end of the third resistor R3 to a low level by pressing the key K1, causing the control unit 3 to control the scanner U3 to start after checking the low level.
In some embodiments, as shown in fig. 7, the key reading unit 2 includes a PSAM card slot 21. The PSAM card slot 21 is in communication connection with the main control unit 3, and the PSAM card slot 21 is used for installing a PSAM card.
Further, in some embodiments, as shown in fig. 7, the key reading unit 2 further includes an electrostatic protection unit 22 and a filtering unit 23. Specifically, the electrostatic protection unit 22 is electrically connected to the PSAM card slot 21, and the electrostatic protection unit 22 is used for preventing the PSAM card slot 21 from damaging the subsequent circuit due to static electricity when the PSAM card is installed. The filtering unit 23 is electrically connected to the PSAM card slot 21, and the filtering unit 23 is configured to prevent the communication signal between the PSAM card slot 21 and the main control unit 3 from being filtered.
In some embodiments, as shown in fig. 7, the electrostatic protection unit 22 includes a first electrostatic protection tube Z16 electrically connected to the VSIM pin of the PSAM card slot 21, a second electrostatic protection tube Z17 electrically connected to the RST pin of the PSAM card slot 21, a third electrostatic protection tube Z18 electrically connected to the CLK pin of the PSAM card slot 21, and a fourth electrostatic protection tube Z19 electrically connected to the I/O pin of the PSAM card slot 21.
In some embodiments, as shown in fig. 7, filter unit 23 includes a fourth capacitor C50 and a fifth capacitor C51 electrically connected to the VSIM pin of PSAM card slot 21, a sixth capacitor C48 electrically connected to the RST pin of PSAM card slot 21, a seventh capacitor C49 electrically connected to the CLK pin of PSAM card slot 21, and an eighth capacitor C52 electrically connected to the I/O pin of PSAM card slot 21.
Further, as shown in fig. 7, the key reading unit 2 further includes a thirteenth resistor R13, a fifteenth resistor R15, a twelfth resistor R12, and a seventeenth resistor R17. Referring to fig. 7 and 8, the RST pin of the psam card slot 21 is electrically connected to the main control unit 3 via a thirteenth resistor R13, the CLK pin of the psam card slot 21 is electrically connected to the main control unit 3 via a fifteenth resistor R15, and the I/O pin of the psam card slot 21 is electrically connected to the main control unit 3 via a seventeenth resistor R17. The thirteenth resistor R13, the fifteenth resistor R15, and the seventeenth resistor R17 each play a role of current limiting. In addition, the VSIM pin of the PSAM card slot 21 is electrically connected to the main control unit 3 to obtain electricity from the main control unit 3 to the PSAM card, and the VSIM pin of the PSAM card slot 21 is also electrically connected to the I/O pin of the PSAM card slot 21 through the twelfth resistor R12, where the twelfth resistor R12 plays a role of pull-up.
In some embodiments, as shown in fig. 8, the main control unit 3 includes a processor U2 and a first diode D1. The processor U2 includes a plurality of IO ports and an internal voltage supply terminal CVCC, which are respectively and electrically connected to the scanning unit 1, the key reading unit 2, and the interface unit 4 in a communication manner, and the specific electrical connection of each IO port may refer to fig. 2, fig. 4, fig. 5, fig. 7, and fig. 8, and the internal voltage supply terminal CVCC is electrically connected to a VSIM pin of the PSAM card slot 21. In addition, referring to fig. 6 and 8, an anode of the first diode D1 is connected to the processor U2, and a cathode of the first diode D1 is connected to a first end of the third resistor R3.
The utility model also provides a scanning peripheral device which is used for the mobile terminal and comprises the scanning peripheral circuit provided by the embodiment of the utility model.
By implementing the technical scheme of the utility model, the mobile terminal can be connected with the mobile terminal through the interface unit, then the scanning unit scans the bar code information, the key reading unit reads the key information used for encrypting and decrypting the bar code information, and the mode switching unit sets the mobile terminal to HOST mode, so that the scanning unit, the key reading unit and the main control unit can take electricity from the mobile terminal, and the main control unit also establishes communication connection with the mobile terminal through the interface unit, so that the main control unit can transmit the encrypted bar code information to the mobile terminal.
It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A scanning peripheral circuit for a mobile terminal, comprising:
a scanning unit (1) for scanning bar code information;
A key reading unit (2) for reading key information serving as encrypted bar code information;
The main control unit (3) is electrically connected with the scanning unit (1) and the key reading unit (2) and is used for transmitting the encrypted bar code information to the mobile terminal;
The interface unit (4) is electrically connected with the scanning unit (1), the key reading unit (2) and the main control unit (3) and is used for being electrically connected with the mobile terminal so that the main control unit (3) and the mobile terminal are in communication connection, and electricity is taken from the mobile terminal to the scanning unit (1), the key reading unit (2) and the main control unit (3); and
And a mode switching unit (5) electrically connected with the interface unit (4) and used for setting the mobile terminal into HOST mode.
2. The scan peripheral circuit of claim 1, further comprising:
a communication protocol conversion unit (6) electrically connected with the interface unit (4) and the main control unit (3); and/or
And the voltage conversion unit (7) is electrically connected with the interface unit (4) and the main control unit (3) and is used for performing voltage conversion on the power supply voltage output by the mobile terminal and supplying power to the main control unit (3).
3. The scanning peripheral circuit according to claim 2, wherein the communication protocol conversion unit (6) comprises a USB-to-serial chip U1; the USB communication end of the USB-to-serial port chip U1 is electrically connected with the interface unit (4), and the serial port communication end of the USB-to-serial port chip U1 is electrically connected with the main control unit (3).
4. Scanning peripheral circuit according to claim 2, characterized in that said voltage conversion unit (7) comprises a linear voltage regulator U4; the input end of the linear voltage stabilizer U4 is electrically connected with the power supply voltage output end of the interface unit (4), and the output end of the linear voltage stabilizer U4 is electrically connected with the main control unit (3).
5. The scanning peripheral circuit according to claim 2, wherein said interface unit (4) comprises a TypeC connection (41), and said mode switching unit (5) comprises a first resistor R1;
The utility model discloses a mobile terminal, including mobile terminal, scanning unit (1), key reading unit (2), main control unit (3), communication protocol conversion unit (6) and voltage conversion unit (7), the USB communication end electricity that typeC connects (41) is connected communication protocol conversion unit (6), the mode setting end that typeC connects (41) is through first resistance R1 electricity is connected to ground, typeC connects (41) power supply voltage output end electricity that power supply unit (4) is connected typeC connects (41) is used for the electricity to connect power supply end, USB communication end and mode setting end that typeC connects (41) is used for the electricity to connect mobile terminal.
6. The scanning peripheral circuit according to any of claims 1 to 5, wherein the scanning unit (1) comprises:
The scanner U3 is electrically connected with the main control unit (3) and the interface unit (4) and is used for scanning the bar code information; and
And the scanner opening and closing control unit is electrically connected with the main control unit (3) and used for controlling the scanner U3 to be started or closed according to the operation of a user.
7. The scan peripheral circuit according to claim 6, wherein said scanner on-off control unit comprises a key K1, a third resistor R3 and a third capacitor C3;
The first contact of the key K1 is electrically connected with the second end of the third resistor R3, the first end of the third resistor R3 is electrically connected with the main control unit (3), the first end of the third resistor R3 is also electrically connected to the ground through the third capacitor C3, and the second contact of the key K1 is grounded.
8. Scanning peripheral circuit according to any of claims 1 to 5, characterized in that said key reading unit (2) comprises a PSAM card slot (21) in communicative connection with said main control unit (3).
9. The scanning peripheral circuit according to claim 8, wherein said key reading unit (2) further comprises:
an electrostatic protection unit (22) electrically connected with the PSAM card slot (21); and
And the filtering unit (23) is electrically connected with the PSAM clamping groove (21) and is used for preventing communication signals between the PSAM clamping groove (21) and the main control unit (3) from being filtered.
10. A scanning peripheral device for a mobile terminal, comprising a scanning peripheral circuit as claimed in any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322900239.1U CN220913649U (en) | 2023-10-27 | 2023-10-27 | Scanning peripheral circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322900239.1U CN220913649U (en) | 2023-10-27 | 2023-10-27 | Scanning peripheral circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220913649U true CN220913649U (en) | 2024-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322900239.1U Active CN220913649U (en) | 2023-10-27 | 2023-10-27 | Scanning peripheral circuit and device |
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|---|---|
| CN (1) | CN220913649U (en) |
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2023
- 2023-10-27 CN CN202322900239.1U patent/CN220913649U/en active Active
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