CN214338104U - Rocker circuit and earphone - Google Patents

Abstract

The utility model discloses a rocker circuit and an earphone, which generate an adjusting signal according to a sensed rocker direction instruction through a rocker input circuit; the pull-up circuit pulls up the adjusting signal to output a control signal; the control circuit responds according to the control signal to execute corresponding functions, so that the circuit structure is simplified, the requirement on the area of the circuit board surface is low, the limitation of the structural space of an electronic product is overcome, and the electronic device can adapt to a plurality of electronic products with small volumes.

Description

Rocker circuit and earphone

Technical Field

The utility model relates to the field of electronic technology, especially, relate to a rocker circuit and earphone.

Background

At present, many electronic products have a plurality of control buttons in their control modules. A general electronic product may select an unequal number of key operations. However, because the volume of some electronic products, such as earphones, is small, the circuit of the electronic product must be simpler due to the limitation of the structural space, the circuit structure with the control function is shown in fig. 1, the circuit is controlled by a plurality of keys with unequal number, however, such a circuit requires that the main control chip includes enough general data input/output ports, and is complicated in circuit design.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a control circuit and earphone to simplify the control circuit structure of electronic product.

The embodiment of the utility model provides a rocker circuit is provided, include:

the rocker input circuit is configured to generate an adjusting signal according to the sensed rocker direction instruction;

the pull-up circuit is connected with the rocker input circuit and is configured to pull up the adjusting signal to output a control signal;

and the control circuit is connected with the rocker input circuit and the pull-up circuit and is configured to respond according to the control signal to execute corresponding functions.

Preferably, the rocker input circuit comprises a rocker and n divider resistors; the resistance values of the n divider resistors are different;

an ith normally open contact of the rocker is connected with a first end of the ith divider resistor, a common contact of the rocker is connected to an adjusting signal output end of the rocker input circuit, and a second end of the ith divider resistor is connected with a power ground; wherein i is a natural number less than or equal to n, and n is an integer greater than 0.

Preferably, the pull-up circuit includes a pull-up resistor.

Preferably, the control circuit comprises a microprocessor; and a first general data input and output end of the microprocessor is connected to a control signal output end of the control circuit.

Preferably, the rocker circuit further comprises:

and the current limiting circuit is connected with the rocker input circuit, the pull-up circuit and the control circuit and is configured to limit the current of the control signal.

Preferably, the current limiting circuit comprises a current limiting resistor.

Preferably, the rocker circuit further comprises:

and the filter circuit is connected with the rocker input circuit, the pull-up circuit and the control circuit and is configured to filter the control signal.

Preferably, the filter circuit comprises a capacitor.

The embodiment of the utility model provides a still provide an earphone, a serial communication port, the earphone includes the aforesaid rocker circuit.

The rocker circuit senses the direction of the rocker through the rocker input circuit to generate an adjusting signal, and then the voltage of the adjusting signal is pulled up through the pull-up circuit to output a control signal to the control circuit, so that the control circuit can execute a corresponding function according to the control signal.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and 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 inventive labor.

FIG. 1 is a circuit diagram of a conventional control circuit with a control function;

fig. 2 is a circuit diagram of a control circuit according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a part of a control circuit according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the utility model provides a control circuit can use on the electronic product that most possesses control function. The embodiment of the utility model provides an use and explain as the example on the earphone. Specifically, referring to fig. 2, the control circuit 20 includes: the device comprises a rocker input circuit 10, a control circuit 20 and a pull-up circuit 30, wherein the rocker input circuit 10 is connected with the pull-up circuit 30, and the control circuit 20 is connected with the rocker input circuit 10 and the pull-up circuit 30. Specifically, the rocker input circuit 10 is configured to generate an adjustment signal according to a sensed rocker direction command; the pull-up circuit 30 is configured to pull up the adjustment signal to output a control signal; the control circuit 20 is configured to respond to the control signal to perform a corresponding function.

The rocker circuit senses the direction of a rocker through the rocker input circuit 10 to generate an adjusting signal, and then pulls up the voltage of the adjusting signal through the pull-up circuit 30 to output a control signal to the control circuit 20, so that the control circuit 20 can execute a corresponding function according to the control signal.

Specifically, as shown in fig. 3, the rocker input circuit 10 includes a rocker and n voltage dividing resistors R1i, the resistance values of the n voltage dividing resistors R1i are different, and an ith normally open contact of the rocker 11 is connected to a first end of the ith voltage dividing resistor R1 i; a common contact of the rocker 11 is connected to a regulation signal output end of the rocker input circuit 10, and a second end of the ith divider resistor R1i is connected with a power ground; wherein i is a natural number less than or equal to n, and n is an integer greater than 0. Illustratively, the normally open contact of the rocker 11 is disposed around the common contact of the rocker 11, such as up, down, left, and right, and when the ith normally open contact of the rocker 11 is connected to the common contact, the pull-up circuit 30 pulls up the voltage at the common contact of the rocker 11 and outputs the voltage to the control circuit 20 through the adjustment signal output terminal of the rocker input circuit 10. Because the resistance values of the voltage dividing resistors are different, when the common contact of the rocker 11 is connected with different normally open contacts, the voltages at the common contact are also different, and after the voltages are pulled up by the voltage pull-up circuit 30, the voltages output to the control circuit 20 are also different, accordingly, the control circuit 20 can identify the connection between the different normally open contacts and the common contact by identifying the voltage input into the control circuit 20, i.e., identify different control signals, and then respond according to the control signals to execute corresponding functions. It should be noted that, in the embodiment of the present invention, the normally open contact position of the rocker is not limited to the upper, lower, left, right, and left, and can be set in the upper, lower, upper, right, and lower, and other directions, and the number of the normally open contact and the normally open contact position can be set according to the actual requirement, and this embodiment is not specifically limited herein.

Specifically, one end of the pull-up circuit 30 is connected to a pull-up power supply for providing a higher voltage, the pull-up circuit 30 includes a pull-up resistor R2, the number of the pull-up resistors R2 may be one or more, and in an embodiment that uses a plurality of pull-up resistors R2, the pull-up resistors R2 may be connected in series or in parallel, which is not limited herein.

Specifically, the control circuit 20 includes a microprocessor; a first general data input output of the microprocessor is connected to a control signal output of said control circuit 20. The microprocessor may be configured to receive the control signal and identify the control signal to perform a corresponding function in response to the control signal.

The rocker circuit divides the voltage generated when each normally open contact and the common contact of the rocker are connected through the voltage dividing resistor R1i and the pull-up resistor R2, and outputs the voltage to the control circuit 20 for voltage identification, and then function distribution is carried out according to the identified voltage, so that the circuit design can be effectively simplified, the area requirement on the circuit board surface is small, the circuit has low requirements on the number of ports or pins of the microprocessor, and when the circuit is designed, the microprocessor with smaller volume and lower cost can be selected, the rocker circuit can adapt to a plurality of electronic products with smaller volume, and is particularly suitable for earphones.

Since the control circuit 20 performs signal recognition by detecting the voltage of the control signal, if the output current of the pull-up circuit 30 is too large, the control circuit 20 may be damaged, and for this reason, the current limiting circuit 40 is added to the rocker circuit to limit the current flowing into the control circuit 20. Specifically, the current limiting circuit 40 is connected to the rocker input circuit 10, the pull-up circuit 30, and the control circuit 20, and specifically, a first end of the current limiting circuit 40 may be connected to a connection point of the pull-up circuit 30 and the rocker input circuit 10, and a second end may be connected to the control circuit 20.

For example, the current limiting circuit 40 may limit the current using a current limiting resistor R3, may limit the current using a diode, or may limit the current using a combination of the two. In the embodiment using the current limiting resistor R3, one or more current limiting resistors R3 may be used, and when a plurality of current limiting resistors R3 are used, the current limiting resistors R3 may be connected in series.

In addition, when the control signal is outputted to the control circuit 20, an interference signal is easily generated, so that the recognition rate of the control circuit 20 for the control signal is reduced, and in order to increase the recognition rate, a filter circuit 50 may be added to the control circuit 20 to filter the interference. Specifically, the filter circuit 50 is connected to the rocker input circuit 10, the pull-up circuit 30, and the control circuit 20, and specifically, a first terminal of the filter circuit 50 may be connected to a connection point of the pull-up circuit 30 and the rocker input circuit 10, and a second terminal thereof may be connected to ground. Illustratively, the filtering circuit 50 may perform filtering by using a capacitor C0, or may perform filtering by using an inductive filtering.

The embodiment of the utility model provides a still provide an earphone, this earphone has adopted above-mentioned rocker circuit.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.

The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims (9)

1. A rocker circuit, comprising:

the rocker input circuit is configured to generate an adjusting signal according to the sensed rocker direction instruction;

the pull-up circuit is connected with the rocker input circuit and is configured to pull up the adjusting signal to output a control signal;

and the control circuit is connected with the rocker input circuit and the pull-up circuit and is configured to respond according to the control signal to execute corresponding functions.

2. The rocker circuit of claim 1, wherein the rocker input circuit comprises a rocker and n divider resistors; the resistance values of the n divider resistors are different;

an ith normally open contact of the rocker is connected with a first end of the ith divider resistor, a common contact of the rocker is connected to an adjusting signal output end of the rocker input circuit, and a second end of the ith divider resistor is connected with a power ground; wherein i is a natural number less than or equal to n, and n is an integer greater than 0.

3. The rocker circuit of claim 1 wherein the pull-up circuit comprises a pull-up resistor.

4. The rocker circuit of claim 1, wherein the control circuit comprises a microprocessor; and a first general data input and output end of the microprocessor is connected to a control signal output end of the control circuit.

5. The rocker circuit of claim 1, further comprising:

and the current limiting circuit is connected with the rocker input circuit, the pull-up circuit and the control circuit and is configured to limit the current of the control signal.

6. The rocker circuit of claim 5 wherein the current limiting circuit comprises a current limiting resistor.

7. The rocker circuit of claim 1, further comprising:

and the filter circuit is connected with the rocker input circuit, the pull-up circuit and the control circuit and is configured to filter the control signal.

8. The rocker circuit of claim 7 wherein the filter circuit comprises a capacitor.

9. A headset, characterized in that the headset comprises a rocker circuit as claimed in any one of claims 1 to 8.

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