Desk type interphone with Bluetooth box

Abstract

The utility model provides a desk type interphone with a Bluetooth box, which belongs to the field of interphones, and comprises a Bluetooth box and a Bluetooth hand microphone, the Bluetooth box is connected with a host through a hand microphone interface, the Bluetooth hand microphone is matched with a Bluetooth module, the Bluetooth module is bidirectionally connected with a microprocessor, and the microprocessor is connected with the Bluetooth box. One end of the communication unit is in two-way connection with the microprocessor, the other end of the communication unit is connected with the hand microphone interface to realize single-duplex serial port communication, the keyboard control unit comprises an analog module and a functional module, one ends of the analog module and the functional module are respectively connected with different output ends of the microprocessor, and the analog module and the functional module are respectively connected with different input ends of the hand microphone interface. One end of the earphone seat is connected with the Bluetooth module, the other end is connected with the host, so that the host and the Bluetooth hand microphone transmit audio, and the power supply unit is connected with a power supply pin of the hand microphone interface. And the Bluetooth hand microphone is connected with the host through the Bluetooth box, so that the operation range of the table type interphone is expanded under the condition that the function of the table type interphone is not influenced, and the table type interphone can be used in more working occasions.

Description

Technical Field

[0001] The utility model relates to a desktop intercom with a Bluetooth box. Background Art

[0002] Existing desktop intercoms typically include a desktop intercom and a hand microphone, which is connected to the desktop intercom via a spring wire. During operation, the hand microphone is used to perform operations such as starting transmission, switching channels, and changing frequencies using a keyboard. However, although the spring wire is stretchable, its operating range is still limited, which restricts the working environments of existing desktop intercoms. Summary of the Invention

[0003] The utility model provides a desktop intercom with a Bluetooth box. The Bluetooth microphone is connected to the host through the Bluetooth box, which expands the operating range of the desktop intercom without affecting the functions of the desktop intercom, so that the desktop intercom can be used in more working occasions.

[0004] The utility model is achieved through the following technical solutions:

[0005] A desktop intercom with a Bluetooth box includes a host and a hand microphone interface connected to the host, and also includes a Bluetooth box and a Bluetooth hand microphone. The Bluetooth box is connected to the host through the hand microphone interface. The Bluetooth box includes a microprocessor, a communication unit, a keyboard control unit, a Bluetooth module, an earphone socket and a power supply unit. The Bluetooth hand microphone is adapted to the Bluetooth module, and the Bluetooth module is bidirectionally connected to the microprocessor. One end of the communication unit is bidirectionally connected to the microprocessor and the other end is connected to the hand microphone interface to realize single- and duplex serial port communication. The keyboard control unit includes an analog module and a functional module, one end of which is respectively connected to different output ends of the microprocessor. The analog module and the functional module are respectively connected to different input ends of the hand microphone interface to respectively adapt to Bluetooth hand microphone keys and function keys realized by analog circuits. One end of the earphone socket is connected to the Bluetooth module and the other end is connected to the host to enable the host to transmit audio with the Bluetooth hand microphone. The power supply unit is connected to the power supply pin of the hand microphone interface and includes an electrolytic capacitor to store energy when the Bluetooth box receives data and replenish energy when sending data. The Bluetooth handheld microphone is connected to the host through a Bluetooth box, which expands the operating range of the desktop intercom without affecting the functions of the desktop intercom, allowing the desktop intercom to be used in more work environments.

[0006] Furthermore, the microprocessor model is CMS32L051.

[0007] Furthermore, the communication unit includes a first transistor (Q2), a first pull-up resistor (R16), a first diode (D3-1), a second diode (D3-2), and a first resistor (R11); the emitter of the first transistor is connected to pin 30 of the microprocessor, the collector is connected to the cathode of the second diode, the anode of the second diode is connected to the cathode of the first diode and pin 6 of the hand-microphone interface, the anode of the first diode is connected to pin 31 of the microprocessor, the first pull-up resistor is connected between the base of the first transistor and the anode of the first diode, and the first resistor is connected between the collector of the first transistor and pin 5 of the hand-microphone interface.

[0008] Furthermore, the analog module of the keyboard control unit includes eleven second transistors (Q3-Q13), the base of each second transistor is connected to a different output pin of the microprocessor, the collector of five of the second transistors is connected to the 10th pin of the hand-microphone interface, and the collector of the other six second transistors is connected to the 11th pin of the hand-microphone interface.

[0009] Furthermore, the functional module of the keyboard control unit includes three second resistors, three pull-up resistors and a pull-up power supply. One end of each second resistor is connected to a different output pin of the microprocessor, and the other end is connected to the 7th, 8th and 9th pins of the microphone interface. One end of the three pull-up resistors is connected to the pull-up power supply, and the other end is connected to one end of the three second resistors.

[0010] Furthermore, the power supply unit includes a power supply chip model LTP3559.

[0011] Furthermore, the power supply unit further includes a first electrolytic capacitor whose positive electrode is connected to the input end of the power chip and a second electrolytic capacitor whose positive electrode is connected to the output end of the power chip.

[0012] Furthermore, the capacity of the first electrolytic capacitor is 3300uF, and the capacity of the second electrolytic capacitor is 2200uF.

[0013] Furthermore, one end of the earphone socket of the Bluetooth box is connected to the Bluetooth module, and the other end is connected to the microphone interface.

[0014] Furthermore, it also includes an audio cable connected between the earphone socket of the host and the earphone socket of the Bluetooth box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be described in further detail below with reference to the accompanying drawings.

[0016] Figure 1 This is a circuit diagram of the Bluetooth box of the present invention.

[0017] Figure 2 for Figure 1 An enlarged view of the microprocessor section.

[0018] Figure 3 for Figure 1 An enlarged view of the communication unit and earphone cradle.

[0019] Figure 4 for Figure 1 Enlarged view of the keyboard control unit.

[0020] Figure 5 for Figure 1 Enlarged view of the power supply unit.

[0021] Among them, 1. Communication unit; 21. Analog module; 22. Functional module; 3. Bluetooth module; 4. Power supply unit; U1. Power chip; U2. Microprocessor; J1. Hand microphone interface; Q2. First transistor; R1. First pull-up resistor; D3-1. First diode; D3-2. Second diode; R2. First resistor; Q3-Q13. Second transistor; R3-R5. Second resistor; R6-R8. Second pull-up resistor; E1. First electrolytic capacitor; E2. Second electrolytic capacitor; E3. Third electrolytic capacitor; 3V3. Pull-up power supply; JK1. Headphone jack. DETAILED DESCRIPTION

[0022] like Figures 1 to 5 As shown, a desktop intercom with a Bluetooth box includes a host, a hand microphone interface J1 connected to the host, a Bluetooth box and a Bluetooth hand microphone. The Bluetooth box is connected to the host through the hand microphone interface J1. The Bluetooth box includes a microprocessor U2, a communication unit 1, a keyboard control unit, a Bluetooth module 3, an earphone seat JK1 and a power supply unit 4. The Bluetooth hand microphone is adapted to the Bluetooth module 3. The Bluetooth module 3 is bidirectionally connected to the microprocessor U2. One end of the communication unit 1 is bidirectionally connected to the microprocessor U2 and the other end is connected to the hand microphone interface J1 to realize single- and duplex serial port communication. The keyboard control unit includes One end of the analog module 21 and the functional module 22 are respectively connected to different output ends of the microprocessor U2, and the analog module 21 and the functional module 22 are respectively connected to different input ends of the hand microphone interface J1 to respectively adapt to the Bluetooth hand microphone buttons and the function keys of the Bluetooth hand microphone realized by the analog circuit. One end of the earphone socket JK1 is connected to the Bluetooth module 3, and the other end is connected to the host to enable the host to transmit audio with the Bluetooth hand microphone. The power supply unit 4 is connected to the power supply pin of the hand microphone interface J1, which includes an electrolytic capacitor to store energy when the Bluetooth box receives data and replenish energy when sending data.

[0023] In this embodiment, the microprocessor U2 is a CMS32L051, a 32-bit microprocessor with ultra-low power consumption. The communication unit 1 includes a first transistor Q1, a first pull-up resistor R1, a first diode D3-1, a second diode D3-2, and a first resistor R2. The emitter of the first transistor Q1 is connected to pin 30 of the microprocessor U2, and the collector is connected to the cathode of the second diode D3-2. The anode of the second diode D3-2 is connected to the cathode of the first diode D3-1 and pin 6 of the hand-held microphone interface J1. The anode of the first diode D3-1 is connected to pin 31 of the microprocessor U2. The first pull-up resistor R1 is connected between the base of the first transistor Q1 and the anode of the first diode D3-1. The first resistor R2 is connected between the collector of the first transistor Q1 and pin 5 of the hand-held microphone interface J1. The first diode D3-1 and the second diode D3-2 are packaged together to form a bidirectional diode. The first transistor Q1 is a band-stop transistor.

[0024] During simplex communication, when the host sends data to the Bluetooth hand microphone, the data sent by the host enters the Bluetooth box through the 6th pin of the hand microphone interface J1, and the anode of the first diode D3-1 is pulled up by the first pull-up resistor R1 to the power supply 3V3 and is forward-conducted. Then the data sent by the host is sent to the 31st pin of the microprocessor U2 through the first diode D3-1, and the microprocessor U2 receives the data sent by the host; when the Bluetooth hand microphone sends data to the host, the data is sent to the microprocessor U2 through the Bluetooth module 3, and the 30th pin of the microprocessor U2 makes the base of the first transistor Q1 high so that the collector and emitter are turned on, and the pull-up power supply 3V3 is turned on by the first pull-up resistor R1 to make the first diode D3-1 turned on, thereby giving the anode of the second diode D3-2 a high level, so that the second diode D3-2 is turned on. Therefore, the data is sent to the host from the 6th pin of the hand microphone interface J1 after passing through the 30th pin of the microprocessor U2, the first transistor Q1 and the second diode D3-2.

[0025] During duplex communication, the process of the host sending data to the Bluetooth hand microphone is the same as that during simplex communication; when the Bluetooth hand microphone sends data to the host, the data goes through the Bluetooth module 3 to the microprocessor U2, and the 30th pin of the microprocessor U2 makes the base of the first transistor Q1 high so that the collector and emitter are turned on. The data passes through the first transistor Q1 and the first resistor R2 and is sent to the host from the 5th pin of the hand interface.

[0026] The analog module 21 of the keyboard control unit includes eleven second transistors (Q3-Q13). The base of each second transistor is connected to a different output pin of the microprocessor U2. Specifically, the bases of the second transistors Q3, Q4, Q5, Q6, and Q7 are connected to pins 42, 43, 18, 19, and 20 of the microprocessor U2, respectively. The collector of the second transistor Q7 is connected to the collector of the second transistor Q6 via a collector resistor R26. Then it is connected to the collector of the second transistor Q5 after passing through the collector resistor R25, and then connected to the collector of the second transistor Q4 after passing through the collector resistor R24, and then connected to the collector of the second transistor Q3 after passing through the collector resistor R23. The collector of the second transistor Q3 is connected to the cathode of the third diode D5, and the anode of the third diode D5 is connected to the 10th pin of the microphone interface J1; the second transistor Q8, the second transistor Q9, the second transistor Q10, the second transistor Q11, the second transistor Q12, and the second transistor The base of transistor Q13 is connected to pins 28, 27, 21, 22, 25, and 26 of microprocessor U2 respectively. The collector of the second transistor Q13 is connected to the collector of the second transistor Q12 through the collector resistor R30, and then connected to the collector of the second transistor Q11 through the collector resistor R29, and then connected to the collector of the second transistor Q10 through the collector resistor R28. The collector of the second transistor Q10 is connected to one end of the collector resistor R27, and the collector of the second transistor Q9 is connected to the dual diode D6. The cathode common terminal of the dual diode D7 is connected, one of the anode terminals of the dual diode D6 is connected to the other end of the collector resistor R27, the other anode terminal of the dual diode D6 is connected to the collector of the second transistor Q4, the collector of the second transistor Q8 is connected to the cathode common terminal of the dual diode D7, one of the anode terminals of the dual diode D7 is connected to the other end of the collector resistor R27, the other anode terminal of the dual diode D7 is connected to the collector of the second transistor Q5, and the other end of the collector resistor R27 is connected to pin 11 of the handheld microphone interface J1.

[0027] The functional module 22 of the keyboard control unit includes three second resistors (R3-R5), three pull-up resistors (R6-R8) and a pull-up power supply 3V3. One end of the three pull-up resistors is connected to the pull-up power supply 3V3, and the other ends of the pull-up resistors R6, R7 and R8 are respectively connected to the second resistor R3, the second resistor R4 and the second resistor R5. One ends of the second resistor R3, the second resistor R4 and the second resistor R5 are also connected to pins 10, 14 and 15 of the microprocessor U2, and the other ends of the second resistors R3, R4 and R5 are respectively connected to pins 7, 8 and 9 of the microphone interface J1.

[0028] Different brands of desktop intercoms have different methods for implementing the hand microphone buttons. For the Bluetooth hand microphone buttons implemented by analog circuits, the analog module 21 of the keyboard control unit is used for implementation. Specifically, the user operates the keyboard group on the Bluetooth hand microphone, and the operation instructions are transmitted to the microprocessor U2 through the Bluetooth module 3. After receiving the operation instructions, the microprocessor U2 controls the on and off of the eleven second transistors according to the operation instructions, so that the 10th and 11th pins of the hand microphone interface J1 generate different matrix combination voltage signals. The host performs different operations by sampling these two matrix combination voltage signals.

[0029] For the hand microphone keyboard realized through serial port data, the user operates through the Bluetooth hand microphone keyboard group, and the operation instruction is transmitted to the microprocessor U2 through the Bluetooth module 3. After receiving the operation instruction, the microprocessor U2 sends the operation instruction to the host through the hand microphone interface J1 according to the existing instruction method. After receiving the instruction, the host executes the operation instruction;

[0030] The Bluetooth hand microphone is also provided with function buttons, such as PTT, channel up, and channel down. When the user operates the function buttons of the Bluetooth hand microphone, the operation instructions are transmitted to the microprocessor U2 through the Bluetooth module 3. After receiving the operation instructions, the microprocessor U2 controls its pins 10, 14, and 15 to output low levels to pull the pins 7, 8, and 9 of the hand microphone interface J1 to low levels. When the host detects the low-level signal of the corresponding pin, it executes the function instructions of the corresponding pin.

[0031] The power supply pin voltages of desktop intercoms of different brands are inconsistent, and some are 12V, 8V or 5V, etc. Therefore, the power supply unit 4 uses a power chip U1 with model LTP3559. The input voltage of the power chip U1 can reach up to 45V, which can cover all voltages used by the desktop intercom system.

[0032] The rated current of the power supply pins of different hand microphone interfaces J1 is different, and some are relatively small. Bluetooth real-time data transmission is a cycle of receiving and sending a section of data. The power consumption is low when receiving data, and the power consumption is high when sending data. The alternating transmission and reception will generate current pulses, affecting the stability of the Bluetooth box. Therefore, in this embodiment, the power supply unit 4 also includes a first electrolytic capacitor E1 connected to the positive pole and the input end of the power chip U1, a second electrolytic capacitor E2 and a third electrolytic capacitor E3 connected to the positive pole and the output end of the power chip U1. The capacity of the first electrolytic capacitor E1 is 3300uF, the capacity of the second electrolytic capacitor E2 is 2200uF, and the capacity of the third electrolytic capacitor E3 is 220uF. In this way, energy can be stored when the power consumption is low when receiving data, and energy can be supplemented when the power consumption is high when sending data, so as to make up for the defect of insufficient rated current of the external power supply of the hand microphone interface J1.

[0033] For audio transmission, different host computers' handheld microphone interfaces (J1) may or may not have an audio receiving extension pin. If the handheld microphone interface (J1) is equipped with an audio receiving extension pin, one end of the Bluetooth box's earphone jack (JK1) is connected to the Bluetooth module 3 and the other end is connected to pin 3 of the handheld microphone interface (J1). The received audio is transmitted to the earphone jack (JK1) via pin 3 of the handheld microphone interface (J1). From there, the received audio is sent to the Bluetooth module 3 and then to the Bluetooth handheld microphone. If the audio extension pin is not equipped, connect an AUX audio cable between the host's earphone jack (JK1) and the Bluetooth box's earphone jack (JK1). This cable allows the host's audio to be transmitted to the Bluetooth module 3. When the AUX audio cable is plugged into the Bluetooth box's earphone jack (JK1), the spring clip on pin 1 of the earphone jack (JK1) pops open and is no longer connected to pin 2 of the earphone jack, thereby isolating the audio input pin of the handheld microphone interface (J1).

[0034] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of implementation of the present invention. In other words, equivalent changes and modifications made according to the scope of the patent application and the contents of the specification of the present invention should still fall within the scope of the present patent.

Claims

1. A desktop intercom with a Bluetooth box, comprising a main unit and a handheld microphone interface connected to the main unit, characterized in that: It also includes a Bluetooth box and a Bluetooth hand microphone. The Bluetooth box is connected to the host through the hand microphone interface. The Bluetooth box includes a microprocessor, a communication unit, a keyboard control unit, a Bluetooth module, a headphone socket and a power supply unit. The Bluetooth hand microphone is adapted to the Bluetooth module, and the Bluetooth module is bidirectionally connected to the microprocessor. One end of the communication unit is bidirectionally connected to the microprocessor and the other end is connected to the hand microphone interface to realize single-duplex serial communication. The keyboard control unit includes an analog module and a functional module one end of which are respectively connected to different output ends of the microprocessor. The analog module and the functional module are respectively connected to different input ends of the hand microphone interface to respectively adapt to the Bluetooth hand microphone buttons and the function keys of the Bluetooth hand microphone realized by the analog circuit. One end of the headphone socket is connected to the Bluetooth module and the other end is connected to the host to enable the host to transmit audio with the Bluetooth hand microphone. The power supply unit is connected to the power supply pin of the hand microphone interface, which includes an electrolytic capacitor to store energy when the Bluetooth box receives data and replenish energy when sending data.

2. The desktop intercom with a Bluetooth box according to claim 1, characterized in that: The microprocessor model is CMS32L051.

3. The desktop intercom with a Bluetooth box according to claim 2, characterized in that: The communication unit includes a first transistor (Q2), a first pull-up resistor (R16), a first diode (D3-1), a second diode (D3-2), and a first resistor (R11); the emitter of the first transistor is connected to the 30th pin of the microprocessor, the collector is connected to the cathode of the second diode, the anode of the second diode is connected to the cathode of the first diode and the 6th pin of the hand microphone interface, the anode of the first diode is connected to the 31st pin of the microprocessor, the first pull-up resistor is connected between the base of the first transistor and the anode of the first diode, and the first resistor is connected between the collector of the first transistor and the 5th pin of the hand microphone interface.

4. A desktop intercom with a Bluetooth box according to claim 2 or 3, characterized in that: The analog module of the keyboard control unit includes eleven second transistors (Q3-Q13), the base of each second transistor is connected to a different output pin of the microprocessor, the collector of five of the second transistors is connected to pin 10 of the hand microphone interface, and the collector of the other six second transistors is connected to pin 11 of the hand microphone interface.

5. A desktop intercom with a Bluetooth box according to claim 2 or 3, characterized in that: The functional module of the keyboard control unit includes three second resistors, three pull-up resistors and a pull-up power supply. One end of each second resistor is connected to a different output pin of the microprocessor, and the other end is connected to the 7th, 8th and 9th pins of the microphone interface. One end of the three pull-up resistors is connected to the pull-up power supply, and the other end is connected to one end of the three second resistors.

6. A desktop intercom with a Bluetooth box according to claim 2 or 3, characterized in that: The power supply unit includes a power supply chip of model LTP3559.

7. A desktop intercom with a Bluetooth box according to claim 2 or 3, characterized in that: The power supply unit further includes a first electrolytic capacitor whose positive electrode is connected to the input end of the power chip and a second electrolytic capacitor whose positive electrode is connected to the output end of the power chip.

8. The desktop intercom with a Bluetooth box according to claim 7, characterized in that: The capacity of the first electrolytic capacitor is 3300uF, and the capacity of the second electrolytic capacitor is 2200uF.

9. A desktop intercom with a Bluetooth box according to claim 2 or 3, characterized in that: One end of the earphone socket of the Bluetooth box is connected to the Bluetooth module, and the other end is connected to the microphone interface.

10. A desktop intercom with a Bluetooth box according to claim 2 or 3, characterized in that: It also includes an audio cable connected between the headphone jack of the host and the headphone jack of the Bluetooth box.

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