CN217770332U

CN217770332U - Loudspeaker and terminal equipment

Info

Publication number: CN217770332U
Application number: CN202222102058.XU
Authority: CN
Inventors: 顾佳美; 师璐
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2022-11-08
Anticipated expiration: 2032-08-10

Abstract

The present disclosure relates to a speaker and a terminal device. The speaker includes: a first voice coil; a second voice coil; the switching assembly comprises a first working mode and a second working mode, the first voice coil and the second voice coil are connected in parallel under the condition that the switching assembly is in the first working mode, and the first voice coil and the second voice coil are connected in series under the condition that the switching assembly is in the second working mode. After the switching assembly for controlling the voice coils to be connected in series and in parallel is additionally arranged in the loudspeaker, the first voice coil and the second voice coil are controlled to be connected in series or in parallel through the switching assembly, so that the link impedance matched with the loudspeaker mode and the link impedance matched with the receiver mode are realized in the loudspeaker, a device does not need to be additionally arranged on a terminal mainboard, and the layout of the mainboard-level devices of the terminal equipment is optimized.

Description

Loudspeaker and terminal equipment

Technical Field

The present disclosure relates to the field of electroacoustic technology, and in particular, to a speaker and a terminal device.

Background

A speaker is an important component of an electroacoustic device, which converts an electric signal into a sound wave to generate sound. The design of the internal structure of the loudspeaker plays an important role in the overall audio system, and can have a large influence on the final sound quality.

When the two-in-one speaker is adopted in the terminal, the two-in-one speaker has poor anti-interference capability when being in a receiver mode compared with the traditional independent receiver, so that the two-in-one speaker is easily interfered by electromagnetic radiation when being in the receiver mode.

In the related art, the improvement is mainly performed on a main board of a terminal, and a large-current power supply wire is far away from a two-in-one loudspeaker. The method greatly limits the layout of the terminal chip and has poor flexibility. However, the development of the terminal at present tends to be miniaturized and light and thin, and how to reduce the influence of the speaker on the layout of the main board of the terminal is one of the problems that needs to be solved urgently by the person in the art.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, the present disclosure provides a speaker and a terminal device.

According to a first aspect of embodiments of the present disclosure, there is provided a speaker including:

a first voice coil;

a second voice coil;

a first switch, a first end of the first switch is connected with a first end of the first voice coil, and a second end of the first switch is connected with a first end of the second voice coil;

and the movable end of the second switch is connected with the second end of the first voice coil, and the first fixed end of the second switch is connected with the first end of the second voice coil.

Optionally, when the first switch is in a closed state and the movable end of the second switch is connected to the second stationary end, the switching component is in the first operating mode.

Optionally, when the first switch is in an off state and the movable end of the second switch is connected to the first stationary end, the switching component is in the second operating mode.

Optionally, when the switching component is in the first operating mode, the speaker is in a speaker mode;

the link impedance value of the speaker mode is a parallel impedance value of the first voice coil and the second voice coil which are connected in parallel.

Optionally, when the switching component is in the second working mode, the speaker is in a receiver mode;

and the link impedance value of the receiver mode is a series impedance value after the first voice coil and the second voice coil are connected in series.

Optionally, the impedance range of the first voice coil and the second voice coil is between 8-16 ohms.

According to a second aspect of the embodiments of the present disclosure, there is provided a terminal device, including:

the loudspeaker of any one of the first aspect.

Optionally, the method further comprises:

a first output end of the gain audio amplifier is connected with a first end of a first voice coil of the loudspeaker, and a second output end of the gain audio amplifier is connected with a second end of a second voice coil of the loudspeaker;

and the first general input/output interface of the processor is connected with the first end of the first switch included in the switching component, and the second general input/output interface of the processor is connected with the movable end of the second switch included in the switching component.

Optionally, the terminal device is a mobile terminal device.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: after the switching assembly for controlling the voice coils to be connected in series and in parallel is additionally arranged in the loudspeaker, the first voice coil and the second voice coil are controlled to be connected in series or in parallel through the switching assembly, so that the link impedance matched with the loudspeaker mode and the link impedance matched with the receiver mode are realized in the loudspeaker, a device does not need to be additionally arranged on a terminal mainboard, and the layout of the mainboard-level devices of the terminal equipment is optimized. Meanwhile, in the receiver mode, because the anti-interference resistor is not additionally arranged on the terminal mainboard, no direct current bias exists in the receiver mode, and the service life of the loudspeaker in the receiver mode is not influenced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram illustrating an implementation of a conventional two-in-one speaker according to an exemplary embodiment.

Fig. 2 is an exemplary diagram illustrating an electrical equivalent circuit of the speaker when the switching assembly is in the first mode of operation, according to an exemplary embodiment.

Fig. 3 is an exemplary diagram illustrating an electrical equivalent circuit of the speaker when the switching assembly is in the second mode of operation, according to an exemplary embodiment.

Fig. 4 is a schematic diagram illustrating a connection relationship of a first switch and a second switch included in a voice coil and a switching assembly inside a speaker according to an exemplary embodiment.

Fig. 5 is an exemplary diagram of another electrical equivalent circuit of a speaker shown in accordance with an exemplary embodiment.

Fig. 6 is an exemplary diagram of yet another electrical equivalent circuit of a speaker shown in accordance with an exemplary embodiment.

Fig. 7 is a schematic diagram showing a connection relationship of a speaker and a main board of a terminal device according to an exemplary embodiment.

Fig. 8 is a block diagram illustrating a terminal device according to an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

It should be noted that all actions of acquiring signals, information or data in the present application are performed under the premise of complying with the corresponding data protection regulation policy of the country of the location and obtaining the authorization given by the owner of the corresponding device.

Because the anti-interference capability of the two-in-one speaker is lower than that of the traditional independent receiver when the two-in-one speaker is in the receiver mode, that is, the two-in-one speaker is easily interfered by electromagnetic radiation when the two-in-one speaker is in the receiver mode, in the related art, a mode of improvement on a main board of a terminal is mainly adopted, as shown in fig. 1, fig. 1 is a schematic diagram of an implementation mode of the traditional two-in-one speaker according to an exemplary embodiment, in fig. 1, a switch and an anti-interference resistor are added on the main board of the terminal, when the two-in-one speaker is in the speaker mode, the switch is closed, the impedance of a link of the speaker is about 6 ohms of the two-in-one speaker, when the two-in-one speaker is in the receiver mode, the switch is open, and the impedance of the link of the speaker is the sum of the impedance of the two-in-one speaker and the anti-interference impedance.

By adopting the motherboard layout of fig. 1, on one hand, the area of the motherboard is increased, which is contrary to the development of the terminal gradually tending to miniaturization and lightness; on the other hand, when the two-in-one speaker is in a receiver mode, the anti-interference resistor connected in series at one end of the receiver can generate direct current offset, which affects the service life of the receiver.

Thus, the present disclosure provides a speaker. Fig. 2 is an exemplary diagram illustrating an electrical equivalent circuit 100 of a speaker when the switching assembly is in the first mode of operation according to one exemplary embodiment. In fig. 2, when the switching assembly 13 is in the first operation mode, the first voice coil 11 and the second voice coil 12 of the speaker are in parallel.

Fig. 3 is an exemplary diagram illustrating an electrical equivalent circuit 200 of the speaker when the switching assembly is in the second mode of operation, according to one exemplary embodiment. In fig. 3, when the switching assembly 13 is in the second operation mode, the first voice coil 11 and the second voice coil 12 of the speaker are in series.

In which the switching assembly 13 includes a first switch and a second switch, and fig. 4 is a schematic diagram illustrating a connection relationship between a voice coil inside a speaker and the first switch and the second switch included in the switching assembly according to an exemplary embodiment. In fig. 4, a first voice coil 11, a second voice coil 12, and a first switch 21 and a second switch 22 included in the switching assembly 13 are included inside the speaker.

The first end 211 of the first switch 21 is connected to the first end of the first voice coil 11, the second end 212 of the first switch 21 is connected to the first end of the second voice coil 12, the moving end 221 of the second switch 22 is connected to the second end of the first voice coil 11, the first fixed end 222 of the second switch 22 is connected to the first end of the second voice coil 12, and the second fixed end 223 of the second switch is connected to the second end of the second voice coil.

For example, the second end 211 of the first switch 21 may be connected to the first end of the first voice coil 11, and the first end 212 of the first switch 21 may be connected to the first end of the second voice coil 12.

Fig. 5 is an exemplary diagram of another electrical equivalent circuit 300 of a speaker shown in accordance with an exemplary embodiment. As shown in fig. 5, the speaker has two

inputs

101 and 102 for receiving signals OUT + and OUT-from a gain audio amplifier (not shown), and the circuit 300 includes an output 102 coupled to the speaker. When the switching assembly 13 is in the first operation mode, i.e. the first switch 21 is in the closed state, and the movable terminal 221 of the second switch 22 is connected to the second stationary terminal 223, the first voice coil 11 and the second voice coil 12 are connected in parallel. At this time, the loudspeaker is in a loudspeaker mode, and the link impedance value of the loudspeaker mode is the parallel impedance value after the first voice coil and the second voice coil are connected in parallel.

Fig. 6 is an exemplary diagram of yet another electrical equivalent circuit 400 for a speaker shown in accordance with an exemplary embodiment. As shown in fig. 6, the speaker has two

inputs

101 and 102 for receiving signals OUT + and OUT-from a gain audio amplifier (not shown), and the circuit 400 includes an output 102 coupled to the speaker. When the switching assembly 13 is in the second operation mode, i.e. the first switch 21 is in the off state, the moving terminal 221 of the second switch 22 is connected to the first stationary terminal 222, and the first voice coil 11 and the second voice coil 12 are connected in series. At the moment, the loudspeaker is in a receiver mode, and the link impedance value of the receiver mode is the series impedance value after the first voice coil and the second voice coil are connected in series.

The impedance range of the first voice coil 11 and the second voice coil 12 is between 8 and 16 ohms, and further, in the speaker mode, the link impedance value range of the speaker mode is a parallel impedance value range after the first voice coil 11 and the second voice coil 12 are connected in parallel, namely, between 4 and 8 ohms. In the receiver mode, the range of the link impedance value in the receiver mode is the range of the series impedance value after the first voice coil 11 and the second voice coil 12 are connected in series, namely 16-32 ohms.

Illustratively, the impedance of the first voice coil 11 and the second voice coil 12 are both 12 ohms, and the link impedance value of the speaker mode is 6 ohms. The link impedance value in receiver mode is 24 ohms. It is understood that the impedance of the first voice coil and the second voice coil in the embodiments of the present disclosure may be set and adjusted as needed, and the present disclosure does not limit this.

Therefore, in the loudspeaker disclosed by the disclosure, the switching component for controlling the voice coils to be connected in series and in parallel is added in the loudspeaker, after the impedance of the voice coils is designed to be matched with the impedance value of the loudspeaker mode and the impedance value of the receiver mode, the switching component controls the first voice coil and the second voice coil to be connected in series or in parallel, so that the link impedance matched with the loudspeaker mode and the link impedance matched with the receiver mode are realized in the loudspeaker, no additional device is required to be arranged on a terminal mainboard, and the layout of mainboard-level devices of the terminal equipment is optimized. Meanwhile, in the receiver mode, because the anti-interference resistor is not additionally arranged on the terminal mainboard, no direct current bias exists in the receiver mode, and the service life of the loudspeaker in the receiver mode is not influenced.

Fig. 7 is a schematic diagram illustrating a connection relationship between a speaker and a main board of a terminal device according to an exemplary embodiment. Wherein a first output terminal (OUT + terminal) of the gain audio amplifier is connected to a first terminal of a first voice coil 11 of the speaker, a second output terminal (OUT-terminal) of the gain audio amplifier is connected to a second terminal of a second voice coil 12 of the speaker, and the second terminal of the second voice coil 12 of the speaker is coupled to the output terminal of the speaker. A first general purpose input/output interface of the processor (e.g. a central processing unit CPU) is connected to the first terminal 211 of the first switch 21, and a second general purpose input/output interface of the processor is connected to the moving terminal 221 of the second switch 22.

In fig. 7, the speaker and the gain audio amplifier form a path of a speaker signal, and the CPU controls the switch inside the speaker to be closed according to the mode (i.e., speaker mode or receiver mode) of the speaker, so as to match the link impedance of the speaker mode inside the speaker and match the link impedance of the receiver mode, without additionally arranging a device on the terminal motherboard, thereby optimizing the layout of the motherboard-level devices of the terminal device.

Fig. 8 is a block diagram illustrating a terminal device 800 according to an example embodiment. For example, the terminal device 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like.

Referring to fig. 8, terminal device 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output interface 812, a sensor component 814, and a communication component 816.

The processing component 802 generally controls overall operation of the terminal device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations at the terminal device 800. Examples of such data include instructions for any application or method operating on terminal device 800, contact data, phonebook data, messages, pictures, videos, and the like. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 806 provide power to the various components of terminal device 800. Power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for terminal device 800.

The multimedia component 808 comprises a screen providing an output interface between the terminal device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. When the terminal device 800 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive an external audio signal when the terminal device 800 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The input/output interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

Sensor component 814 includes one or more sensors for providing various aspects of state assessment for terminal device 800. For example, sensor assembly 814 may detect an open/closed status of terminal device 800, the relative positioning of components, such as a display and keypad of terminal device 800, sensor assembly 814 may also detect a change in the position of terminal device 800 or a component of terminal device 800, the presence or absence of user contact with terminal device 800, orientation or acceleration/deceleration of terminal device 800, and a change in the temperature of terminal device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communication component 816 is configured to facilitate communications between terminal device 800 and other devices in a wired or wireless manner. The terminal device 800 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the terminal device 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components.

In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions, such as the memory 804 including instructions, is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A loudspeaker, comprising:

a first voice coil;

a second voice coil;

the switching assembly comprises a first working mode and a second working mode, the first voice coil and the second voice coil are connected in parallel under the condition that the switching assembly is in the first working mode, and the first voice coil and the second voice coil are connected in series under the condition that the switching assembly is in the second working mode.

2. The loudspeaker of claim 1, wherein the switching assembly comprises:

the second switch is a single-pole double-throw switch, wherein the movable end of the second switch is connected with the second end of the first voice coil, the first immovable end of the second switch is connected with the first end of the second voice coil, and the second immovable end of the second switch is connected with the second end of the second voice coil.

3. The loudspeaker of claim 2, wherein the switching assembly is in the first operating mode when the first switch is in the closed state and the moving end of the second switch is connected to the second stationary end.

4. The loudspeaker of claim 2, wherein the switching assembly is in the second mode of operation when the first switch is in the off state and the moving end of the second switch is connected to the first stationary end.

5. The speaker of claim 3, wherein when the switching component is in the first mode of operation, the speaker is in a speaker mode;

and the link impedance value of the loudspeaker mode is a parallel impedance value after the first voice coil and the second voice coil are connected in parallel.

6. The speaker of claim 4, wherein when the switching component is in the second mode of operation, the speaker is in a receiver mode;

7. A loudspeaker according to any one of claims 1 to 6, wherein the impedance of the first and second voice coils is in the range 8-16 ohms.

8. A terminal device, comprising:

a loudspeaker according to any one of claims 1 to 7.

9. The terminal device according to claim 8, further comprising:

10. The terminal device according to claim 8, wherein the terminal device is a mobile terminal device.