CN201590882U - Bluetooth headset - Google Patents

Abstract

The utility model provides a bluetooth headset which comprises a bluetooth chip, a multifunctional key and a battery, wherein the multifunctional key is connected in series between the battery and a power-on pin of the bluetooth chip. The bluetooth headset further comprises a delay trigger circuit which is connected in series between the multifunctional key and a reset pin of the bluetooth chip and used for resetting the bluetooth chip after the multifunctional key is pressed for a certain time period. The bluetooth headset achieves the function that the main chip of the bluetooth headset is reset after a long key press without affecting other operations of the bluetooth headset, and also has the characteristics of no reset during charging, holding-on during charging, etc. In addition, the circuit is achieved simply, so as to facilitate the debugging and testing of headset designers during the production design, as well as the operation and use of consumers.

Description

Bluetooth earphone

Technical field

The utility model relates to the bluetooth earphone technical field, specifically, relates to a kind of bluetooth earphone that has long by strong reset function.

Background technology

For the bluetooth master chip in the earphone, generation is often arranged because embedded program runs the situation that flies to make earphone irregular incidents such as deadlock occur.And the method that the earphone that solves crashes has two kinds, a kind of is to take earphone apart to take off headset batteries, makes the thorough power down of chip, connects battery again and starts shooting again, this method is feasible in the production test phase to bare machine, but obviously infeasible for the daily use of consumer.Another kind method is exactly the use of starting shooting again that resets of reset function pin by master chip.At present the bluetooth master chip of band MCU all has reset pin RESET, and is low level and resets.BC03, BC04, BC05, the BC06 series of producing with the Bluetooth chip CSR of present main flow are example, offer some clarification in the specifications of chip to add a low level greater than 5ms can guarantee stable the resetting of chip on the RESET pin.Provide a personal-machine mutual interface so, to the given low level signal of bluetooth earphone master chip reset pin chip is successfully resetted and solve the phenomenons such as race flies that crash.

For wireless bluetooth earphone equipment, its maximum characteristics are exactly portable and radio operation, present bluetooth earphone product increases day by day to miniaturization, portable requirement, the miniaturization of volume makes that the operation of man-machine interaction must obtain simplifying so, thereby should reduce the Operating Complexity of bluetooth earphone as far as possible.Present bluetooth earphone has following function button mostly, " volume+" key, " volume-" key, a multifunction push key and a USB charging socket." volume+" realizes the increase of sound, " volume-" realizes reducing of volume, multifunction push key is realized the power up function of bluetooth earphone, after start and the mobile phone successful connection, also have the button function that button is hung up the telephone and last code is replayed in receiving calls, conversing, USB charging socket is that the lithium battery in the bluetooth earphone is done charging inlet.On the basis that does not increase extra key, the bluetooth earphone reset function is the insertion by the USB charging wire usually, and the level of one+5V is provided, and realizes bluetooth master chip reset pin is dragged down the function that resets by the reset circuit of inside.According to the difference of internal circuit design, this charging resets and can realize resetting the back start, and does not start shooting after resetting two kinds.The resetting of chip when these two kinds of methods are inserted chargers has ongoing conversation is hung up, perhaps the drawback that can not converse charging the time.Therefore the present invention has utilized multifunction push key under the prerequisite that does not influence normal use, multifunction push key is applied pushing of a 13s-25s, through an inner simple triode, several resistance capacitances reach reset pin dragged down and make the purpose of chip reset.This method does not influence other functions of multifunction push key, and has effectively saved the earphone space, and circuit is simple, and is with low cost, has reached the effect to the chip active homing.

The utility model content

The technical problems to be solved in the utility model is: do not increasing additional key and do not influencing under the normal prerequisite of using of earphone, for earphone provides a reset function interface.

To achieve these goals, the utility model provides a kind of bluetooth earphone, comprise Bluetooth chip, multifunction push key and battery, described multifunction push key is connected in series between the start pin of battery and Bluetooth chip, in addition, this bluetooth earphone also comprises delay trigger circuit, is connected in series between the reset pin of multifunction push key and Bluetooth chip, is used to push multifunction push key Bluetooth chip is resetted.

In addition, preferred construction is that described delay trigger circuit comprises a charging RC networking and a triode; Described charging RC is made up of a resistance and a capacitors in series at the networking; Capacitor one end ground connection in the described RC networking, the other end is electrically connected with the base stage of described triode; The collector electrode of described triode is connected with the reset pin of Bluetooth chip.

In addition, preferred construction is, described delay trigger circuit also comprises a discharge circuit, and described discharge circuit comprises that one is reversely connected to the switching diode on the charging RC networking and the resistance of a ground connection.

In addition, preferred construction is the bleeder circuit of also connecting between described charging RC networking and described triode.

In addition, preferred construction is, described bleeder circuit comprises that an earth resistance and one are connected the resistance between the base stage of capacitor and triode, and the other end of earth resistance links to each other with the base stage of triode.

In addition, preferred, the appearance value of capacitor is 10 μ F.

According to method for designing of the present utility model, realized the long button of bluetooth earphone master chip is reached the function that resets, do not influence simultaneously other operation of bluetooth earphone, and have charging and do not reset, can continue characteristics such as conversation during charging.And behind the employing such scheme, do not increasing additional key and do not influencing under the normal prerequisite of using of earphone, for earphone provides a reset function interface, circuit is realized simple, help earphone designer debugging test when design is produced, help the consumer simultaneously and manipulate.

Description of drawings

By below in conjunction with accompanying drawing embodiment being described, above-mentioned feature of the present utility model and technological merit will become apparent and understand easily.

Fig. 1 is the structured flowchart of expression the utility model bluetooth earphone;

Fig. 2 is that the time-delay of expression the utility model bluetooth earphone triggers the reset circuit principle schematic.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done further detailed description.

Fig. 1 is the structured flowchart of expression the utility model bluetooth earphone.As shown in Figure 1, bluetooth earphone provided by the utility model comprises Bluetoothchip 1,multifunction push key 2,battery 3 and delay trigger circuit 4, whereinmultifunction push key 2 is connected in series between the start pin ofbattery 3 and Bluetoothchip 1, be used to pushconnection battery 3 and Bluetoothchip 1, carry out power up function; Delay trigger circuit 4 is connected in series between the reset pin ofmultifunction push key 2 and Bluetoothchip 1, is used for controlling Bluetooth chip after a period of time and resetting pushing multifunction push key.

One of the utility model preferred embodiment in, delay trigger circuit 4 comprises a charging RC networking and a triode.The RC networking of wherein charging is made up of a resistance and a capacitors in series; Capacitor one end ground connection, the other end is electrically connected with the base stage of triode; The collector electrode of triode is connected with the reset pin of Bluetoothchip 1.

In the utility model, have the start and the two kinds of functions that reset in order to make themultifunction push key 2 different compressing times of response, delay trigger circuit 4 is connected between the reset pin ofmultifunction push key 2 and Bluetooth chip 1.Specifically, many merits button connects the switch enable pin of battery pin and chip, in the chip enable side, draw another branch road that resets, earphone enables start by enable pin when multifunction push key is pressed, battery voltage signal enters in the reset circuit simultaneously, cell voltage charges to capacitor through the RC networking, in the process of capacitor charging, the voltage of the one end ground connection other end improves constantly, this end is connected to the base stage of a triode simultaneously, and the triode collector electrode is received the RESTET pin of chip, emitter grounding.Make the base stage of triode reach its threshold voltage when capacitor voltage at both ends is enough big, triode is operated in the amplification region, and collector voltage reduces gradually.Along with the continuous charging of capacitor, capacitor voltage at both ends raises, and the electric current that flows through transistor base is enough big, makes triode be operated in the saturation region, and so at this time transistor collector is pulled to low level, makes chip thoroughly enter into reset mode.Pressing chip by button and enter into reset mode, is 13s-25s if cell voltage in the 3.4V-4.2V scope, enters the compressing time of reset mode so.

Fig. 2 represents that specifically the time-delay of the utility model bluetooth earphone triggers the principle schematic of reset circuit.As shown in Figure 2, multifunction push key 2 (SW1) is connected to anode, and the other end is connected to the start pin of Bluetooth chip by switching diode BAS40L, and R1 plays an effect that current limliting is saturated.Draw a branch road from SW1, connect delay trigger circuit 4, in the utility model, delay trigger circuit 4 comprises a charging RC networking and a triode, and the RC networking of wherein charging comprises aresistance R 3 and a capacitor C1.

Wherein, R3 is connected in this branch road, and resistance is 2M ohm, and the other end series connection of R3 inserts C1 to ground, and the appearance value of C1 is 10uF.The end of C1 is connected to the base stage of triode Q1 through a series resistance R4, and we are chosen to be NPN triode BC847BW with Q1 at this.R5 and R4 form a bleeder circuit simultaneously, and their resistance is 1M ohm.The collector electrode of triode Q1 is received on the high level 3V0 through pull-up resistor R6, and wherein the R6 resistance is 220K.The emitter grounding of triode Q1.

R3 and C1 form a charging RC networking, and after multifunction push key SW1 pressed, cell voltage charged to C1 through R3, and along with the increase of button time, the electric weight of capacitor C1 constantly increases, and both end voltage increases gradually.After the voltage at capacitor C1 two ends was enough big through R4, R5 dividing potential drop, Q1 entered into the saturation region by the amplification region, and the collector electrode of Q1 is 0.2V-0.65V according to its triode characteristic at this moment, is approximately low level.This moment, the RESET pin was undercuted, and after surpassing 5ms, chip enters into stable reset mode.

In the actual application, multifunction push key can often be pressed, such as the short time button of starting shooting, answering the call, hanging up or other are random, therefore for prevent the consumer operate in repeatedly button cause the electric capacity charging can not bleed off the operation that the chip mistake is resetted, the each weak point of the special design of the utility model all needs to bleed off electric weight resident among the C1 rapidly after pressing and unclamping button, in order to avoid the repeatedly short back of pushing does not cause restarting owing to there being discharge loop to make electric capacity continue charging by mistake.Adopted switching diode BAS40L reversal connection to the method that enables in the loop electric charge to be bled off in this practical circuit, realized function the rapid discharge of capacitor.

As shown in Figure 2, oppositely connect a discharge diode D2 among the present invention on C1, the model of D2 is BAS40L, and the other end series connection R2 of D2 is to ground, and the resistance of R2 is 20K.After button unclamps, reside in that electric weight bleeds off by D2 and R2 rapidly among the capacitor C1, because R2 is enough little, make discharge time very short, within a few tens of milliseconds.So just reached the effect that mistake resets.Simultaneously, because start time of pressing of bluetooth earphone is 4s, and answers and press and hang up the time of pressing and be generally the hundreds of millisecond, then this circuit can not have influence on the normal use of earphone.

The solution repositioning method circuit that the utility model provides is simple, easy to operate, and does not influence other normal runnings and the work of bluetooth earphone.Solution of the present utility model can effectively be applied in other consumer electronics products that have MCU simultaneously, need not specific (special) requirements on the surface structure and makes product have the function of hand-reset to reach.

Under above-mentioned instruction of the present utility model; those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description; and these improvement and distortion; all drop in the protection range of the present utility model; those skilled in the art should be understood that; above-mentioned specific descriptions are just better explained the purpose of this utility model, and protection range of the present utility model is limited by claim and equivalent thereof.

Claims (6)

1. a bluetooth earphone comprises Bluetooth chip, multifunction push key and battery, and described multifunction push key is connected in series between the start pin of battery and Bluetooth chip, it is characterized in that, also comprises:

Delay trigger circuit is connected in series between the reset pin of multifunction push key and Bluetooth chip, is used to push multifunction push key Bluetooth chip is resetted.

2. according to the described bluetooth earphone of claim 1, it is characterized in that,

Described delay trigger circuit comprises a charging RC networking and a triode;

Described charging RC is made up of a resistance and a capacitors in series at the networking;

Capacitor one end ground connection in the described RC networking, the other end is electrically connected with the base stage of described triode;

The collector electrode of described triode is connected with the reset pin of Bluetooth chip.

3. according to the described bluetooth earphone of claim 2, it is characterized in that,

Described delay trigger circuit also comprises a discharge circuit, and described discharge circuit comprises that one is reversely connected to the switching diode on the charging RC networking and the resistance of a ground connection.

4. according to the described bluetooth earphone of claim 2, it is characterized in that,

The bleeder circuit of between described charging RC networking and described triode, also connecting.

5. according to the described bluetooth earphone of claim 4, it is characterized in that,

Described bleeder circuit comprises that an earth resistance and one are connected the resistance between the base stage of described capacitor and described triode, and the other end of described earth resistance links to each other with the base stage of described triode.

6. according to each described bluetooth earphone in the claim 2 to 5, it is characterized in that,

The appearance value of described capacitor is 10 μ F.

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