CN218676167U - Switching device for internal and external antennas of POS terminal - Google Patents
Switching device for internal and external antennas of POS terminal Download PDFInfo
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- CN218676167U CN218676167U CN202223196754.8U CN202223196754U CN218676167U CN 218676167 U CN218676167 U CN 218676167U CN 202223196754 U CN202223196754 U CN 202223196754U CN 218676167 U CN218676167 U CN 218676167U
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Abstract
The utility model discloses a switching device of external antenna in POS terminal, include: the antenna switching circuit comprises an antenna switching switch module and an antenna switch control module; the antenna changeover switch module is respectively and electrically connected with the built-in antenna module, the radio frequency module and the antenna switch control module, and the safety contact is electrically connected with the antenna switch control module; the external antenna module and the antenna change-over switch module can be electrically connected in a connection and disconnection mode, and the conductive particles and the safety contacts can be electrically connected in a connection and disconnection mode. The utility model is used for switch built-in and external antenna at POS terminal, satisfy the application of the different scenes at POS terminal.
Description
Technical Field
The utility model relates to a POS terminal technical field especially relates to a switching device of external antenna in POS terminal.
Background
The existing POS terminal only has one type of antenna, namely an internal antenna or an external antenna, and in order to meet different application scenes, for example, the existing POS terminal uses the internal antenna as a mobile terminal under the outdoor condition with good signals; the fixed terminal is used as an external antenna in an indoor environment with poor signals; in the application scenario, only one type of antenna is not flexible in use, and two sets of structures are needed to meet the assembly of antennas in different forms.
Disclosure of Invention
In view of this, the utility model aims at providing an external antenna's auto-change over device in POS terminal for switch over the built-in and external antenna at POS terminal, satisfy the application of the different scenes of POS terminal.
In order to realize the technical purpose, the utility model adopts the technical scheme that: the utility model discloses a switching device of external antenna in POS terminal, include: the antenna switching circuit comprises an antenna switching switch module and an antenna switch control module; the antenna changeover switch module is respectively and electrically connected with the built-in antenna module, the radio frequency module and the antenna switch control module, and the safety contact is electrically connected with the antenna switch control module; the external antenna module and the antenna change-over switch module can be electrically connected in a break-make mode, and the conductive particles and the safety contact can be electrically connected in a break-make mode;
when the external antenna module needs to be used, the conductive particles are connected with the safety contacts and the external antenna module is connected with the antenna switch module, the antenna switch control module controls the antenna switch module to be connected with the external antenna module and the radio frequency module, and the external antenna module starts to work;
when the built-in antenna module needs to be used, the electric connection between the conductive particles and the safety contacts is disconnected, the electric connection between the external antenna module and the antenna switch module is disconnected, the antenna switch control module controls the antenna switch module to be connected with the built-in antenna module and the radio frequency module, and the built-in antenna module starts to work.
Further, the antenna change-over switch module includes a chip U1, a resistor R3 and a capacitor C1, a first pin of the chip U1 is connected with the built-in antenna module, a second pin of the chip U1 is grounded, a third pin of the chip U1 is connected with the antenna switch control module, a fourth pin of the chip U1 is connected with one end of the resistor R3, the other end of the resistor R3 is connected to the VCC, a fifth pin of the chip U1 and one end of the capacitor C1 are both connected to the VCC, the other end of the capacitor C1 is grounded, a sixth pin of the chip U1 is grounded, a seventh pin of the chip U1 is connected with the external antenna module, and an eighth pin of the chip U1 is connected with the radio frequency module.
Further, the model of the chip U1 is MXD8529.
Further, antenna switch control module includes MOS pipe Q1, resistance R1 and resistance R2, MOS pipe Q1 ' S the G utmost point is connected with resistance R1 ' S one end and safety contact respectively, MOS pipe Q1 ' S the S utmost point and resistance R1 ' S the other end all are connected to the power VCC, MOS pipe Q1 ' S the D utmost point is connected with antenna change-over switch module and resistance R2 ' S one end respectively, resistance R2 ' S the other end ground connection.
Furthermore, the safety contact is a comb-shaped wiring and comprises a first signal end and a second signal end, the first signal end is grounded, and the second signal end is connected with the antenna switch control module; the conductive particles are in close contact with the comb-shaped wires.
Further, the external antenna module comprises an external antenna, a first interface and a second interface, and the second interface is located in the POS machine and connected to a seventh pin of the chip U1; the external antenna and the first interface are located outside the POS machine, one end of the first interface is fixedly connected with the external antenna, and the other end of the first interface is detachably connected with the second interface.
Furthermore, the first interface and the second interface are in threaded connection or plug-in connection.
Furthermore, the first interface and the conductive particles are fixed through a fixing part, the contact surfaces of the first interface and the conductive particles are located in the same direction, the safety contact and the second interface are arranged on a PCB (printed circuit board) located in the POS machine, and the safety contact and the second interface are respectively arranged corresponding to the positions of the conductive particles and the first interface.
Further, the fixing piece is an adhesive tape.
Further, the conductive particles are conductive carbon particles.
Adopt foretell technical scheme, compared with the prior art, the utility model, its beneficial effect who has is: the utility model discloses a auto-change over device is used for switching built-in antenna and the external antenna at POS terminal, satisfies the application of the different scenes at POS terminal. When the external antenna module needs to be used, the electric connection between the conductive particle and the safety contact is switched on, and the electric connection between the external antenna module and the antenna change-over switch module is switched on, the antenna change-over switch control module controls the antenna change-over switch module to switch on the external antenna module and the radio frequency module, and the external antenna module starts to work; when the built-in antenna module needs to be used, the electric connection between the conductive particles and the safety contact is disconnected, the electric connection between the external antenna module and the antenna change-over switch module is disconnected, the antenna switch control module controls the antenna change-over switch module to be connected with the built-in antenna module and the radio frequency module, and the built-in antenna module starts to work. The utility model can complete the antenna switching of POS machines with different application scenes with lower cost, save the development of a plurality of structural moulds and save the cost; the production and assembly processes can be unified, and a plurality of sets of BOMs do not need to be configured according to applications with different forms. The POS terminal in one form can meet the requirement of using the built-in or external antenna, and the use of different scenes of the POS terminal can be flexibly dealt with.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a switching device for external antennas in a POS terminal according to the present invention.
Fig. 2 is a detailed internal structure view of fig. 1.
Fig. 3 is a schematic diagram of the structure and function of the middle chip U1 of the present invention.
Fig. 4 is a schematic structural diagram of the safety contact in the present invention.
Fig. 5 is a schematic structural diagram of the conductive particles of the present invention.
Fig. 6 is a top view of the external antenna module and the conductive particles of the present invention when they are not inserted.
Fig. 7 is a top view of the external antenna module and the conductive particles inserted in the present invention.
Fig. 8 is a schematic structural view of the external antenna module and the conductive particles of the present invention.
Fig. 9 is a schematic view of the threaded connection between the first interface and the second interface of the present invention.
Fig. 10 is a schematic diagram of the plug connection between the first interface and the second interface in the present invention.
The reference numbers in the figures illustrate:
the antenna switching circuit 1, the antenna switching switch module 11, the antenna switch control module 12, the internal antenna module 2, the external antenna module 3, the first interface 31, the second interface 32, the external antenna 33, the conductive particles 4, the safety contact 5, the signal end 51, the second signal end 52, the comb-shaped wire 53, the radio frequency module 6, the fixing member 7 and the PCB 8;
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be noted that the following examples are only for illustrating the present invention, but do not limit the scope of the present invention. Similarly, the following embodiments are only some but not all embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
The utility model provides an external antenna's auto-change over device in POS terminal can practice thrift the cost, can deal with the use of internal antenna and external antenna under the different scenes of POS terminal in a flexible way.
Referring to fig. 1 to 10, the switching device for external antennas in a POS terminal of the present invention includes: the antenna switching circuit comprises an antenna switching circuit 1, an internal antenna module 2, an external antenna module 3, conductive particles 4, a safety contact 5 and a radio frequency module 6, wherein the antenna switching circuit 1 comprises an antenna switching switch module 11 and an antenna switch control module 12; the antenna change-over switch module 11 is respectively electrically connected with the built-in antenna module 2, the radio frequency module 6 and the antenna switch control module 12, and the safety contact 5 is electrically connected with the antenna switch control module 12; the external antenna module 3 and the antenna change-over switch module 11 can be electrically connected in a break-make mode, and the conductive particles 4 and the safety contacts 5 can be electrically connected in a break-make mode;
when the external antenna module 3 needs to be used, the conductive particles 4 are electrically connected with the safety contacts 5 and the external antenna module 3 is electrically connected with the antenna switch module 11, the antenna switch control module 12 controls the antenna switch module 11 to be connected with the external antenna module 3 and the radio frequency module 6, and the external antenna module 3 starts to work;
when the internal antenna module 2 needs to be used, the electrical connection between the conductive particles 4 and the safety contact 5 is disconnected, the electrical connection between the external antenna module 3 and the antenna switch module 11 is disconnected, the antenna switch control module 12 controls the antenna switch module 11 to connect the internal antenna module 2 and the radio frequency module 6, and the internal antenna module 2 starts to work.
In this embodiment, the antenna switch module 11 includes a chip U1, a resistor R3, and a capacitor C1, where the model of the chip U1 is MXD8529. The first pin of the chip U1 is connected with the built-in antenna module 2, the second pin of the chip U1 is grounded, the third pin of the chip U1 is connected with the antenna switch control module 12 (such as the D pole of the MOS tube Q1), the fourth pin of the chip U1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with a power supply VCC, the fifth pin of the chip U1 and one end of a capacitor C1 are both connected with the power supply VCC, the other end of the capacitor C1 is grounded, the sixth pin of the chip U1 is grounded, the seventh pin of the chip U1 is connected with the external antenna module 3 (such as the second interface), and the eighth pin of the chip U1 is connected with the radio frequency module 6.
The internal structure of the chip U1 is shown in fig. 3:
description of the function of each pin:
the 1 st pin and the 7 th pin are respectively connected with the internal antenna module 2 and the external antenna module 3; the 8 th pin is connected to the radio frequency module 6; the 3 rd pin is a control pin and controls the connection of the 1 st pin or the 7 th pin and the 8 th pin by judging high level or low level; the 4 th pin is an enable pin, i.e., the chip U1 is enabled or disabled (in the present invention, the 4 th pin is pulled up by the resistor R3, and the chip U1 is always in an "operating" state); the 5 th pin is a power supply of the chip U1, and the chip U1 can work only by providing the power supply; the 2 nd pin and the 6 th pin are ground pins.
Description of the operating mechanism of chip U1
The chip U1 normally operates with power and enabled. The utility model discloses in, provide the 3.3V power for chip U1, and enable pin (4 th pin) is the state of drawing high always. I.e. chip U1 is always in the "normal operation" state.
When the 3 rd pin is a high signal (i.e., pulled high), the 7 th pin and the 8 th pin are connected together through a circuit inside the chip U1, and the 1 st pin and the 8 th pin are disconnected. In the present invention, the external antenna module 3 and the rf module 6 are connected together.
When pin 3 is a low signal (i.e., pulled low), the opposite is true, i.e., pins 1 and 8 are connected and pins 7 and 8 are disconnected. In the present invention, the internal antenna module 2 and the rf module 6 are connected together.
The "connected together" mentioned above is the device internal connection of chip U1. There is a switch for pins 1 and 8, and there is also a switch for pins 7 and 8.
The radio frequency module 6 needs the antenna can work, in the utility model discloses, one of them is connected to radio frequency module 6 to built-in antenna module 2 or external antenna module 3 promptly. The utility model discloses embodied is the notion of a "switching". When the external antenna module 3 is not provided, the internal antenna module 2 is connected to the radio frequency module 6, and when the external antenna module 3 is provided, "switching" to the external antenna module 3 is connected to the radio frequency module 6.
In this embodiment, the antenna switch control module 12 includes an MOS transistor Q1, a resistor R1, and a resistor R2, a G pole of the MOS transistor Q1 is connected to one end of the resistor R1 and the safety contact 5 (e.g., the second signal end 52 of the safety contact 5), an S pole of the MOS transistor Q1 and the other end of the resistor R1 are both connected to the power VCC, a D pole of the MOS transistor Q1 is connected to the antenna change-over switch module 11 (e.g., the third pin of the chip U1) and one end of the resistor R2, and the other end of the resistor R2 is grounded. The antenna switch control module 12 is used to better control the switching of the antenna switch module 11 to the internal antenna module 2 or the external antenna module 3.
In this embodiment, the safety contact 5 includes a first signal terminal 51 and a second signal terminal 52, the first signal terminal 51 is grounded, and the second signal terminal 52 is connected to the antenna switch control module 12 (for example, the second signal terminal 52 is respectively connected to one end of the resistor R1 and the G pole of the MOS transistor Q1); the safety contact 5 is a comb-shaped trace 53, the comb-shaped trace 53 is a trace with a special shape on the PCB board 8 (as shown in fig. 4), and when the conductive particles 4 (such as conductive carbon particles, as shown in fig. 5) are pressed on the comb-shaped trace 53, the traces connected to two ends (i.e., the first signal terminal 51 and the second signal terminal 52) of the comb-shaped trace 53 can be connected, (otherwise, when the conductive particles 4 are not pressed, the traces at two ends are disconnected), which is equivalent to a switch. The conductive particles 4 are pressed on the safety contact 5, the conductive particles 4 are tightly contacted with the comb-shaped wiring 53, and the safety contact 5 is conducted through the conductive particles 4, so that the first signal end 51 and the second signal end 52 of the safety contact 5 are connected and conducted; the conductive particles 4 are conductive carbon particles; the conductive area of the conductive particles 4 is greater than or equal to the area of the comb-shaped routing 53.
In this embodiment, the external antenna module 3 includes a first interface 31, a second interface 32 and an external antenna 33, where the second interface 32 is located in a POS (not shown) and is connected to a seventh pin of the chip U1; the external antenna 33 and the first interface 31 are located outside the POS machine, one end of the first interface 31 is fixedly connected with the external antenna 33, and the other end of the first interface 31 is detachably connected with the second interface 32; wherein, the detachable mode has: the first interface 31 and the second interface 32 are connected by threads (as shown in fig. 9) or by plugging (as shown in fig. 10), and a detachable structure is adopted, so that the switching process from the external antenna module 3 to the internal antenna module 2 can be better completed.
In this embodiment, the first interface 31 and the conductive particle 4 are fixed by a fixing member 7, the fixing member 7 is an adhesive tape, contact surfaces of the first interface 31 and the conductive particle 4 are located in the same direction, the safety contact 5 and the second interface 32 are disposed on the PCB 8 located in the POS machine, and the safety contact 5 and the second interface 32 are respectively disposed corresponding to the positions of the conductive particle 4 and the first interface 31; so that the first interface 31 is just connected to the second interface 32 and the conductive particles 4 are just pressed on the comb-shaped traces 53 of the safety contacts 5.
The working principle of the utility model is as follows:
1. when the external antenna module 3 and the conductive particles 4 are not inserted, the first signal end 51 and the second signal end 52 of the safety contact 5 are disconnected, the G pole of the MOS transistor Q1 is pulled high through the resistor R1, the G pole of the MOS transistor Q1 is equal to the S pole voltage, and V is equal to V GS =0V, the S pole and the D pole of the MOS tube Q1 are in an off state, the third pin V1 of the chip U1 (model: MXD 8529) is pulled low (namely, a low level signal) through the resistor R2, when the chip U1 detects that the third pin V1 is a low level signal, the first pin RF1 is connected to the eighth pin, at the moment, the seventh pin and the eighth pin are off, namely, the built-in process is completedThe antenna module 2 is connected to the purpose of the radio frequency module 6.
2. When the external antenna module 3 and the conductive particles 4 are inserted, the conductive particles 4 assembled on the external antenna module 3 automatically contact the safety contact 5 on the PCB 8, the first signal end 51 and the second signal end 52 of the safety contact 5 are conducted, the G pole of the MOS transistor Q1 is pulled down, and at the moment, the voltage V between the G pole and the S pole of the MOS transistor Q1 is reduced GS If the voltage of the third pin V1 of the chip U1 is high (i.e., a high level signal), the chip U1 connects the seventh pin RF2 to the eighth pin ANT when detecting that the third pin V1 is a high level signal, and at this time, the first pin RF1 and the eighth pin ANT are disconnected, that is, the external antenna module 3 is connected to the radio frequency module 6, and after the external antenna module 3 is inserted, the system is switched from the internal antenna to the external antenna. If the external antenna module 3 is correspondingly disconnected, the system will operate in the above-mentioned point 1 manner.
The above only is the partial embodiment of the utility model discloses a not therefore restriction the utility model discloses a protection scope, all utilize the utility model discloses equivalent device or equivalent flow transform that the content of description and drawing was done, or direct or indirect application in other relevant technical field, all the same reason is included in the patent protection scope of the utility model.
Claims (10)
1. The utility model provides a switching device of external antenna in POS terminal which characterized in that includes: the antenna switching circuit comprises an antenna switching switch module and an antenna switch control module; the antenna changeover switch module is respectively and electrically connected with the built-in antenna module, the radio frequency module and the antenna switch control module, and the safety contact is electrically connected with the antenna switch control module; the external antenna module and the antenna change-over switch module can be electrically connected in a break-make mode, and the conductive particles and the safety contact can be electrically connected in a break-make mode;
when the external antenna module needs to be used, the conductive particles are connected with the safety contacts and the external antenna module is connected with the antenna switch module, the antenna switch control module controls the antenna switch module to be connected with the external antenna module and the radio frequency module, and the external antenna module starts to work;
when the built-in antenna module needs to be used, the electric connection between the conductive particles and the safety contacts is disconnected, the electric connection between the external antenna module and the antenna switch module is disconnected, the antenna switch control module controls the antenna switch module to be connected with the built-in antenna module and the radio frequency module, and the built-in antenna module starts to work.
2. The device of claim 1, wherein the antenna switch module comprises a chip U1, a resistor R3, and a capacitor C1, the first pin of the chip U1 is connected to the internal antenna module, the second pin of the chip U1 is grounded, the third pin of the chip U1 is connected to the antenna switch control module, the fourth pin of the chip U1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the power VCC, the fifth pin of the chip U1 and one end of the capacitor C1 are both connected to the power VCC, the other end of the capacitor C1 is grounded, the sixth pin of the chip U1 is grounded, the seventh pin of the chip U1 is connected to the external antenna module, and the eighth pin of the chip U1 is connected to the rf module.
3. The device for switching the external antenna in the POS terminal according to claim 2, wherein the chip U1 has a model of MXD8529.
4. The device according to claim 1, wherein the antenna switch control module comprises a MOS transistor Q1, a resistor R1, and a resistor R2, the G pole of the MOS transistor Q1 is connected to one end of the resistor R1 and the safety contact, the S pole of the MOS transistor Q1 and the other end of the resistor R1 are both connected to a power VCC, the D pole of the MOS transistor Q1 is connected to one end of the antenna switch module and one end of the resistor R2, and the other end of the resistor R2 is grounded.
5. The switching device of the external antenna in the POS terminal according to claim 1, wherein the safety contact is a comb-shaped trace, and comprises a first signal terminal and a second signal terminal, the first signal terminal is grounded, and the second signal terminal is connected to the antenna switch control module; the conductive particles are in close contact with the comb-shaped wires.
6. The device for switching the external antenna in the POS terminal according to claim 2, wherein the external antenna module comprises an external antenna, a first interface, and a second interface, and the second interface is located in the POS terminal and is connected to the seventh pin of the chip U1; the external antenna and the first interface are located outside the POS machine, one end of the first interface is fixedly connected with the external antenna, and the other end of the first interface is detachably connected with the second interface.
7. The device for switching the external antenna inside the POS terminal according to claim 6, wherein the first interface and the second interface are connected by a screw or a plug.
8. The device for switching the external antenna inside the POS terminal according to claim 6, wherein the first interface and the conductive particle are fixed by a fixing member, and the contact surfaces of the first interface and the conductive particle are located in a same direction, the safety contact and the second interface are disposed on a PCB board located inside the POS terminal, and the safety contact and the second interface are respectively disposed corresponding to the positions of the conductive particle and the first interface.
9. The device for switching the external antenna inside the POS terminal according to claim 8, wherein the fixing member is an adhesive tape.
10. The device of claim 1, wherein the conductive particles are carbon particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223196754.8U CN218676167U (en) | 2022-11-30 | 2022-11-30 | Switching device for internal and external antennas of POS terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223196754.8U CN218676167U (en) | 2022-11-30 | 2022-11-30 | Switching device for internal and external antennas of POS terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218676167U true CN218676167U (en) | 2023-03-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223196754.8U Active CN218676167U (en) | 2022-11-30 | 2022-11-30 | Switching device for internal and external antennas of POS terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218676167U (en) |
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2022
- 2022-11-30 CN CN202223196754.8U patent/CN218676167U/en active Active
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