CN206364344U - A kind of headset plug adapter - Google Patents

Abstract

The utility model discloses a kind of headset plug adapter, including temperature detecting unit, control unit and the power switch being connected on the current supply circuit of the headset plug adapter, the temperature detecting unit is arranged to detect the Current Temperatures of the headset plug adapter, and described control unit is arranged to control the state of the power switch according to the Current Temperatures.Pass through the temperature of temperature detecting unit test earphone pin adaptor; control system of switching on or off electricity is carried out to headset plug adapter; the problems such as can protecting headset plug adapter will not be because of short circuit causes overheat to burn out; the electronic equipment of connection can also be played a protective role simultaneously, prevent electronic equipment from being damaged caused by high current is acted on.

Description

A kind of headset plug adapter

Technical field

The utility model is related to technical field of circuit design, turns more specifically, the utility model is related to a kind of headset plug Connect device.

Background technology

As the electronic product of Type-C interfaces is more and more, in the market occurs in that many Type-C turn turning for 3.5mm Connect device.And one end of this adapter is the Type-C plugs that can be inserted on mobile phone, the other end is 3.5mm sockets.This 3.5mm sockets are for insertion into the earphone of 3.5mm interfaces, still, and we can not ensure user when in use, can insert Other things, such as nail or tweezers, can not also prevent adapter from intaking, and it is short that these situations all may result in adapter Road.Due to the related elements heating that adapter short circuit or other exceptions are ultimately resulted in, circuit is shown in the form of heat energy In, adapter heating burnout is may result in, producing high current may also can cause the electronic equipment of connection to damage.

Therefore a kind of can effectively prevent because various abnormal operations cause the adapter of adapter heating burnout problem is proposed It is very valuable.

Utility model content

A purpose of the present utility model, which is to provide, a kind of prevents the new solution of adapter heating burnout.

According to first aspect of the present utility model, there is provided a kind of headset plug adapter, including temperature detecting unit, control Unit processed and the power switch being connected on the current supply circuit of the headset plug adapter, the temperature detecting unit are set The Current Temperatures for detecting the headset plug adapter are set to, described control unit is arranged to control according to the Current Temperatures The state of the power switch.

Optionally, the temperature detecting unit is provided by a temperature sensor.

Optionally, the power switch is provided by a NMOS tube.

Optionally, the power switch is provided by an analog switch chip.

Optionally, the headset plug adapter also includes coding unit, decoding unit, for connecting electronic equipment USB plug and the 3.5mm sockets for connecting earphone, the decoding unit are arranged to the electronic equipment through the USB The digital audio and video signals that plug is sent carry out digital-to-analogue conversion processing, and the left channel signals for obtaining analog quantity are corresponding with right-channel signals Transmit to the L channel contact of 3.5mm sockets and R channel contact；The coding unit is arranged to the Mike to the earphone Mike's analog signal that wind is sent through the 3.5mm sockets carries out analog-to-digital conversion process, obtains Mike's data signal through the USB Plug is sent to the electronic equipment.

Optionally, the power switch is connected between the power pins of the USB plug and supply voltage output end, The supply voltage output end is arranged to provide supply voltage to the coding unit and the decoding unit.

Optionally, the headset plug adapter also includes voltage conversion unit, the voltage conversion unit and described Power switch is connected in series between the power pins of the USB plug and the supply voltage output end, the voltage conversion Unit is arranged to for the supply voltage provide the voltage conversion of the power end offer of the USB plug to the power supply electricity Press output end.

Optionally, the USB plug is Type-C plugs.

Optionally, the temperature detecting unit, described control unit, the decoding unit and the coding unit are all provided with Put on same circuit board.

Optionally, described control unit, the decoding unit and the coding unit are provided by a codec chip.

A beneficial effect of the present utility model is, passes through the temperature of temperature detecting unit test earphone pin adaptor Degree, control system of switching on or off electricity is carried out to headset plug adapter, and the problems such as can protecting headset plug adapter will not be because of short circuit causes Overheat is burnt out, while can also be played a protective role to the electronic equipment of connection, prevents electronic equipment from causing because of high current effect Damage.

It is of the present utility model other by referring to the drawings to the detailed description of exemplary embodiment of the present utility model Feature and its advantage will be made apparent from.

Brief description of the drawings

The accompanying drawing for being combined in the description and constituting a part for specification shows embodiment of the present utility model, and And be used to explain principle of the present utility model together with its explanation.

Fig. 1 is according to a kind of a kind of frame principle figure of embodiment of headset plug adapter of the utility model；

Fig. 2 is according to a kind of frame principle figure of the another embodiment of headset plug adapter of the utility model；

Fig. 3 is according to a kind of a kind of circuit theory diagrams of embodiment of headset plug adapter of the utility model.

Description of reference numerals：

U1：Temperature detecting unit；U2：Control unit；

S1：Power switch；U3：Decoding unit；

U4：Coding unit；U5：Voltage conversion unit；

U6：Processor；U7：Analog switch chip；

J1：USB plug；J2:3.5mm socket；

J11：Type-C plugs；VCC：Power end；

GND：Earth terminal；VBUS：The power pins of USB plug；

VBUS1：The power pins of Type-C sockets；VCC7：The power pins of analog switch chip；

The power pins of VCC6- processors；IN1：The controlling switch of analog switch chip；

COM1：The data-out pin of analog switch chip；

NO1：The data output pins of analog switch chip；

RXN、RXP、TXN、TXP：The differential pin of Type-C sockets；

P1.1、P1.2、P1.3、P1.4、P2.1、P2.2、P2.3、P2.4、P2.5：The I/O pins of processor；

VDD：Supply voltage output end.

Embodiment

Various exemplary embodiments of the present utility model are described in detail now with reference to accompanying drawing.It should be noted that：Unless another Illustrate outside, the part and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments is not limited Make scope of the present utility model.

The description only actually at least one exemplary embodiment is illustrative below, never as to this practicality New and its application or any limitation used.

It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable In the case of, the technology, method and apparatus should be considered as a part for specification.

In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without It is as limitation.Therefore, other examples of exemplary embodiment can have different values.

It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.

In order to solve present in prior art because insertion nail, tweezers or the earphone caused by abnormal operation such as intake are inserted Head adapter short circuit, causes it to cross cause thermal damage, and the problem of electronic equipment of connection is damaged may also can be caused by producing high current, be carried A kind of headset plug adapter is supplied, as shown in figure 1, the headset plug adapter includes temperature detecting unit U1, control unit The U2 and power switch S1 being connected on the current supply circuit of headset plug adapter, temperature detecting unit U1 are arranged to detection should The Current Temperatures of headset plug adapter；Control unit U2 is arranged to the shape by power switch S1 is controlled according to Current Temperatures State.

Above-mentioned power switch S1 is connected on the current supply circuit of headset plug adapter, i.e. power switch S1 is connected to power supply Hold between VCC and earth terminal GND, when power switch S1 is closed, the headset plug adapter is powered, normal work, works as power supply When switching S1 disconnections, the headset plug adapter powers off, is stopped.Power switch S1 is specially gate-controlled switch, and control is single First U2 controls power switch S1 on off state.Power switch S1 can be real by discrete components such as triode, metal-oxide-semiconductors It is existing, such as being specifically as follows N-type triode, p-type triode, N-channel MOS pipe or P-channel metal-oxide-semiconductor.

Wherein, temperature detecting unit U1 can be the current temperature for the circuit board that detection is provided with temperature detecting unit U1 Degree, because all elements being arranged on temperature detecting unit U1 on same circuit board are connected by copper sheet, copper sheet can be led Heat, if there is the related elements heating that short circuit or other exceptions are ultimately resulted on the circuit board, the heat of generation will lead to Cross copper sheet to be transmitted on all positions of the circuit board, therefore, temperature detecting unit U1 will detect the circuit board in real time Current Temperatures, and Current Temperatures are sent to control unit U2 in real time.

Further, the temperature range of circuit board when temperature detecting unit U1 needs first test earphone normal work, for example It can be pre-stored in using the maximum in the temperature range as fiducial temperature in control unit U2.

The Current Temperatures received and the fiducial temperature that prestores are compared control unit U2, if Current Temperatures No more than fiducial temperature, then it is considered that the circuit board is normal, therefore, the control signal of output control power switch S1 closures, For example can be high level so that electricity, normal work on the utility model headset plug adapter；If Current Temperatures exceed base Quasi- temperature, then it is considered that there is the heating that short circuit or other exceptions are ultimately resulted on the circuit board, therefore, output control electricity The control signal that source switch S1 disconnects, for example, can be low level so that the power-off of the utility model headset plug adapter, stopping Work.

On this basis, the supply voltage that power end VCC is provided is directly transferred to control unit without power switch S1 U2, so, after the headset plug adapter extracts electronic equipment, again insertable into the moment of electronic equipment, power switch S1 is led It is logical, so that whether control unit U2 normal works detection Current Temperatures exceed fiducial temperature and control power switch S1 state, To ensure that the headset plug adapter can be used normally after temperature decreases below fiducial temperature.

So, by the temperature of temperature detecting unit test earphone pin adaptor, headset plug adapter is led to Power-off control, the problems such as can protecting headset plug adapter will not be because of short circuit causes overheat to burn out, while can also be to connection Electronic equipment play a protective role, prevent electronic equipment because high current act on caused by damage.

On this basis, power switch S1 for example can be NMOS tube, and the NMOS tube is when control signal is high level Conducting, ends when control signal is low level.

Specifically, temperature detecting unit U1 of the present utility model can be provided by a temperature sensor, can be digital temperature Spend sensor or analog temperature sensor.

Fig. 2 is the frame principle figure of another implementation structure according to a kind of headset plug adapter of the utility model.

According to Fig. 2, the utility model headset plug adapter also includes decoding unit U3, coding unit U4, is used for The USB plug J1 of electronic equipment and the 3.5mm socket J2 for connecting earphone are connected, because USB plug J1 transmission is numeral Signal, and 3.5mm sockets J2 transmission for analog signal, therefore, need decoding unit U3 to send electronic equipment through USB plug J1 Digital audio and video signals carry out digital-to-analogue conversion processing, obtain the left channel signals and right-channel signals of analog quantity, and by L channel Signal is sent to 3.5mm sockets J2 L channel contact, and right-channel signals are sent to 3.5mm sockets J2 R channel contact； Need coding unit U4 to carry out analog-to-digital conversion process through the 3.5mm sockets J2 Mike's analog signals sent to the microphone of earphone, obtain To Mike's data signal electronic equipment is sent to through USB plug J1.Wherein, USB plug J1 power pins VBUS is earphone The power end VCC of pin adaptor.

USB plug J1 has grounding pin, power pins VBUS and a pair of differential pins, USB plug J1 voltage pin VCC is that the utility model headset plug adapter is powered, grounding pin GND and the utility model headset plug adapter ground connection End connection, a pair of differential pins are used to transmit digital audio and video signals and Mike's data signal.Wherein, USB plug J1 can be USB Any one in A types plug, mini-USB plugs, micro-USB plugs and Type-C plugs.

Further, power switch S1 can be power pins VBUS and the supply voltage output for being connected to USB plug J1 Hold between VDD, supply voltage output end is arranged to provide supply voltage to decoding unit U3 and coding unit U4.

Because the USB plug J1 power pins VBUS voltages provided are 5V, and decoding unit U3 and coding unit U4 Supply voltage, which differs, establishes a capital as 5V, therefore, and headset plug adapter can also include voltage conversion unit U5, voltage conversion unit U5 and power switch S1 are connected in series between USB plug J1 power pins VBUS and supply voltage output end VDD, and voltage turns Change the supply voltage that voltage conversion is decoding unit U3 and coding unit U4 that unit U5 is arranged to provide power end VCC VDD is provided to decoding unit U3 and coding unit U4, for example, decoding unit U3 and coding unit U4 supply voltages are 3.3V, So, the 5V voltage conversions that voltage conversion unit U5 provides the power pins VBUS of earphone for 3.3V supply voltage provide to Decoding unit U3 and coding unit U4.

For headset plug adapter, decoding unit U3 and coding unit U4 cost are higher, therefore, it can only to decoding Unit U3 and coding unit U4 carries out temperature detection, it is to avoid it is damaged in use, due to temperature detecting unit U1 The temperature for being provided with all elements on temperature detecting unit U1 circuit board of detection, therefore, of the present utility model one In individual specific embodiment, temperature detecting unit U1, control unit U2, decoding unit U3 and coding unit U4 can be arranged at On same circuit board.

In order to further reduce circuit footprint, in a specific embodiment of the present utility model, control unit U2, Decoding unit U3 and coding unit U4 is provided by a highly integrated codec chip.

In a specific embodiment of the present utility model, control unit U2, decoding unit U3 and coding unit U4 can To be provided by the processor U6 of a model MSp430G2553, power switch S1 is provided by an analog switch chip U7, its model For example can be ET5223, USB socket J1 for example can be Type-C sockets J11.

As shown in figure 3, can for example be, but not limited to, processor U6 P1.1, P1.2, P1.3, P1.4 points of I/O pins Connection not corresponding with Type-C sockets J11 differential pin RXP, RXN, TXN, TXP, processor U6 I/O pins P2.3, P2.4, P2.5 connection corresponding with 3.5mm sockets J2 microphone contact M, R channel contact R and L channel contact L, processing respectively Device U6 I/O pins P2.1 and temperature detecting unit U1 temperature output end are connected, for receiving Current Temperatures；Type-C sockets J11 power pins VBUS1 is as the power end VCC of headset plug adapter, and processor U6 I/O pins P2.2 and simulation are opened Close chip U7 controlling switch IN1 connections；Analog switch chip U7 data-out pin COM1 and Type-C sockets J11 electricity Source pin VBUS1 connections, data output pins NO1 is connected with processor U6 power pins VCC6, analog switch chip U7's Power pins VCC7 is connected with Type-C sockets J11 power pins VBUS1, and data-out pin COM1 can be used as power supply electricity Output end is pressed, analog switch chip U7 is in controlling switch IN1 input high levels, and data-out pin COM1 will be defeated with data Going out between pin NO1 will be connection status, i.e. analog switch chip U7 conductings；In controlling switch IN1 input low levels, data Input pin COM1 will will be off-state between data output pins NO1, i.e. analog switch chip U7 disconnects.Here, Fig. 3 In illustrate only the pin used in the present embodiment.

So, the digital audio and video signals that Type-C sockets J11 differential pins RXP, RXN are received are through I/O pins P1.1, P1.2 Processor U6 is sent to, processor U6 is carried out after digital-to-analogue conversion processing to digital audio and video signals through I/O pins P2.4, P2.5 difference Right-channel signals and left channel signals are exported, and right-channel signals are sent to 3.5mm sockets J2 R channel contact R, by a left side Sound channel signal is sent to 3.5mm sockets J2 L channel contact L.Mike's simulation that 3.5mm sockets J2 microphone contact M is received Signal is sent to processor U6 through I/O pins P2.3, and processor U6 is carried out after analog-to-digital conversion process through I/O to Mike's analog signal Pin P1.3, P1.4 are sent to Type-C socket J11 differential pins TXN, TXP, and then are sent to electronic equipment.

The Current Temperatures of circuit board are sent to processor U6 by temperature detecting unit U1 in real time, and processor U6 works as detecting When preceding temperature is not less than fiducial temperature, high level will be exported by I/O pins P2.2 so that analog switch chip U7 is turned on, place Reason device U6 works on power；When processor U6 is detecting Current Temperatures more than fiducial temperature, it will be exported by I/O pins P2.2 Low level so that analog switch chip U7 disconnects, processor U6 powers off, is stopped, and now I/O pins P2.2 will keep low electricity Level state.In this way, it is possible to effectively prevent that electronic equipment is caused to damage because short circuit produces high current.

Further, in order to reduce the power consumption of the earphone test circuit, processor U6 supply voltage is typically smaller than 5V, example Such as can be 1.8V-3.3V, then, the headset plug adapter also includes voltage conversion unit U5, voltage conversion unit U5 For example can be linear voltage regulator, its model for example can be LM1117.

The various embodiments described above primary focus describes the difference with other embodiment, but those skilled in the art should be clear Chu, the various embodiments described above can be used alone or be combined with each other as needed.

Although some specific embodiments of the present utility model are described in detail by example, this area It is to be understood by the skilled artisans that example above is merely to illustrate, rather than in order to limit scope of the present utility model.This Field it is to be understood by the skilled artisans that can be in the case where not departing from scope and spirit of the present utility model, to above example Modify.Scope of the present utility model is defined by the following claims.

Claims (10)

1. a kind of headset plug adapter, it is characterised in that including temperature detecting unit, control unit and be connected to the ear Power switch on the current supply circuit of machine pin adaptor, the temperature detecting unit is arranged to detect that the headset plug turns The Current Temperatures of device are connect, described control unit is arranged to control the state of the power switch according to the Current Temperatures.

2. headset plug adapter according to claim 1, it is characterised in that the temperature detecting unit is passed by a temperature Sensor is provided.

3. headset plug adapter according to claim 1, it is characterised in that the power switch is carried by a NMOS tube For.

4. headset plug adapter according to claim 1, it is characterised in that the power switch is by an analog switch core Piece is provided.

5. headset plug adapter according to claim 1, it is characterised in that the headset plug adapter also includes compiling Code unit, decoding unit, the USB plug for connecting electronic equipment and the 3.5mm sockets for connecting earphone, the decoding Unit is arranged to carry out digital-to-analogue conversion processing to the digital audio and video signals that the electronic equipment is sent through the USB plug, obtains Left channel signals to analog quantity corresponding with right-channel signals are transmitted to the L channel contact of 3.5mm sockets and R channel contact； Mike's analog signal that the coding unit is arranged to send the microphone of the earphone through the 3.5mm sockets carries out mould Number conversion process, obtains Mike's data signal and is sent to the electronic equipment through the USB plug.

6. headset plug adapter according to claim 5, it is characterised in that the power switch is connected to the USB Between the power pins and supply voltage output end of plug, the supply voltage output end be arranged to the coding unit and The decoding unit provides supply voltage.

7. headset plug adapter according to claim 6, it is characterised in that the headset plug adapter also includes electricity Converting unit is pressed, the voltage conversion unit and the power switch are connected in series in power pins and the institute of the USB plug State between supply voltage output end, the voltage conversion unit is arranged to the voltage of the power end offer of the USB plug The supply voltage is converted to provide to the supply voltage output end.

8. headset plug adapter according to claim 5, it is characterised in that the USB plug is Type-C plugs.

9. headset plug adapter according to claim 5, it is characterised in that the temperature detecting unit, the control Unit, the decoding unit and the coding unit are arranged on same circuit board.

10. headset plug adapter according to claim 5, it is characterised in that described control unit, the decoding unit There is provided with the coding unit by a codec chip.