WO2020187325A1

WO2020187325A1 - Vibration sound production device and mobile terminal

Info

Publication number: WO2020187325A1
Application number: PCT/CN2020/080492
Authority: WO
Inventors: 刘勰
Original assignee: 维沃移动通信有限公司
Priority date: 2019-03-21
Filing date: 2020-03-20
Publication date: 2020-09-24
Also published as: CN109905827B; CN109905827A

Abstract

Provided in the present disclosure are a vibration sound production device and a mobile terminal. The vibration sound production device comprises a support, a magnet, an elastic piece, a first coil, and a second coil, wherein a side of the support is provided with a diaphragm, the diaphragm and the support form an accommodating space, and a sound outlet hole is provided in the support; the first coil is located in the accommodating space, and the first coil is connected to the diaphragm; the magnet is arranged in the accommodating space, and at least part of the magnet is located in the first coil; and one end of the elastic piece is connected to the magnet, the other end of the elastic piece is connected to a first inner surface of the support, and the first inner surface is opposite the diaphragm; and the second coil is fixedly connected to the first inner surface, and the second coil is magnetically coupled to the magnet.

Description

Vibration sound device and mobile terminal

Cross references to related applications

This application claims the priority of Chinese Patent Application No. 201910217838.9 filed in China on March 21, 2019, the entire content of which is incorporated herein by reference.

Technical field

The embodiments of the present disclosure relate to the field of communication technologies, and in particular, to a vibration and sound device and a mobile terminal.

Background technique

With the rapid development of communication technology, mobile terminals have become one of the indispensable electronic devices in people's daily lives. In order to meet the conventional vibration and sound requirements of mobile terminals, vibration motors and sound generators such as speakers and receivers are usually installed inside the mobile terminal. Such an arrangement usually occupies a relatively large installation space inside the mobile terminal.

Summary of the invention

The embodiments of the present disclosure provide a vibration and sound device and a mobile terminal, so as to solve the problem that the related vibration motor and the sound generator occupy a large installation space inside the mobile terminal.

In order to solve the above technical problems, the present disclosure is implemented as follows:

In the first aspect, some embodiments of the present disclosure provide a vibration and sound device applied to a mobile terminal, including:

A bracket, one side of the bracket is provided with a diaphragm, the diaphragm and the bracket form a containing space, and the bracket is provided with a sound hole;

A first coil, the first coil is located in the accommodating space, and the first coil is connected to the diaphragm;

A magnet, the magnet is arranged in the receiving space, and at least part of the magnet is located in the first coil;

An elastic member, one end of the elastic member is connected with the magnet, the other end of the elastic member is connected with the first inner surface of the bracket, and the first inner surface is arranged opposite to the diaphragm;

A second coil, the second coil is fixedly connected with the first inner surface, and the second coil is magnetically coupled with the magnet.

In the second aspect, some embodiments of the present disclosure also provide a mobile terminal including the vibration and sound device as described in the first aspect.

In the technical solution provided by some embodiments of the present disclosure, the vibrating and sounding device is provided with a first coil and a second coil at the same time. When the first coil or the second coil is energized, the vibrating and sounding device can realize the vibration function and the sound function respectively Compared with the related requirement that the vibration motor and the sound generator are separately arranged, the technical solution provided by the present disclosure realizes the combination of the vibration motor and the sound generator, and does not occupy a large installation space inside the mobile terminal. It is more conducive to the development of thin and light mobile terminals.

Description of the drawings

Fig. 1 is a structural diagram of a vibration and sound device provided by some embodiments of the present disclosure;

FIG. 2 is a circuit structure diagram of the vibration and sound device and the mobile terminal provided in FIG. 1; and

Fig. 3 is another circuit structure diagram of the vibration and sound device and the mobile terminal provided in Fig. 1.

detailed description

The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

Please refer to FIG. 1. FIG. 1 is a structural diagram of a vibration and sound device provided by some embodiments of the present disclosure. As shown in FIG. 1, the vibration and sound device 100 includes a bracket 10, a magnet 40, an elastic member 30, and a first coil. 50 and the second coil 60; wherein, one side of the support 10 is provided with a diaphragm 20, the diaphragm 20 and the support 10 form a receiving space 101, and the support 10 is provided with a sound hole; the first coil 50 is located in the receiving space 101 The first coil 50 is connected to the diaphragm 20, the magnet 40 is arranged in the accommodating space 101, and at least a part of the magnet 40 is located in the first coil 50; one end of the elastic member 30 is connected to the magnet 40, and the other of the elastic member 30 One end is connected to the first inner surface 111 of the support 10, and the first inner surface 111 is opposite to the diaphragm 20; the second coil 60 is fixedly connected to the first inner surface 111, and the second coil 60 is magnetically coupled with the magnet 40.

It should be noted that the vibration and sound device 100 provided by some embodiments of the present disclosure is applied in a mobile terminal, which may be a mobile phone, a tablet computer, a palmtop computer, a laptop computer, a smart wearable device, and other electronic products.

Wherein, the first coil 50 and the second coil 60 are both connected to the power supply of the mobile terminal. The power supply can not only refer to the battery that supplies power to multiple devices in the mobile terminal, but also includes a power manager, or a motherboard, etc. and the battery. The general term for connection, the motherboard can carry electronic components such as various circuit modules, wires, and batteries of the mobile terminal. The specific circuit connection relationship and signal transmission principle can be referred to related solutions, and will not be repeated here.

1, the bracket 10 has a trough-shaped structure, and the notch of the trough-shaped structure is covered by the diaphragm 20, and the connection between the bracket 10 and the diaphragm 20 forms a closed receiving space 101 in which the magnet 40 is accommodated 101 and elastically connected to the first inner surface 111 of the bracket 10 through the elastic member 30. One side of the diaphragm 20 is connected to the first coil 50, and one end of the magnet 40 is embedded in the first coil 50. Furthermore, when the first coil 50 is in the energized state, it cuts the magnetic line of induction movement according to the energized wire in the magnetic field. In principle, the magnetic field generated by the magnet 40 will cause the first coil 50 to reciprocate in its axial direction, and the movement of the first coil 50 will also drive the diaphragm 20 to vibrate; by changing the direction and magnitude of the current of the first coil 50, In this way, the movement frequency of the first coil 50 can be controlled, and thus the vibration frequency of the diaphragm 20 can be controlled to achieve sound.

In addition, the accommodating space 101 formed by the support 10 and the diaphragm 20 also contains a second coil 60, the second coil 60 is disposed on the first inner surface 111 of the support 10, and the second coil 60 is magnetically coupled with the magnet 40. As shown in FIG. 1, the support 10 includes a first support plate 11 disposed opposite to the diaphragm 20, and the second coil 60 is fixed on the first support plate 11. Due to the arrangement of the elastic member 30, the first support plate 11 and the magnet 40 A gap is formed therebetween, and the second coil 60 may be located in the gap. Understandably, the sounding principle of the sound generator in the mobile terminal is similar to the vibration principle of the vibration motor, and both use the Ampere's law. When the second coil 60 is in the energized state, according to the principle that the energized wire cuts the magnetic induction line in the magnetic field, since the second coil 60 is fixed on the support 10, the second coil 60 will not move. The direction and magnitude of the current of the second coil 60 will cause the magnet 40 to generate a reciprocating motion with a certain frequency in the axial direction of the second coil 60. Since the magnet 40 is connected to the bracket 10 through the elastic member 30, the movement of the magnet 40 It will also drive the elastic member 30 to make an expansion and contraction movement, thereby driving the entire vibrating and sounding device 100 to vibrate. Among them, the vibration and sound device 100 is installed in the mobile terminal, usually fixed on the middle frame of the mobile terminal, and the vibration of the vibration and sound device 100 will also drive the vibration of the mobile terminal to realize the vibration function of the mobile terminal, such as incoming call vibration. , Message vibration, alarm clock vibration, etc.

It should be noted that when the first coil 50 is energized, the magnet 40 will vibrate due to the induction force of the first coil 50; in order to ensure that the magnet does not move when the first coil 50 is energized, the second coil 60 is also given to The electrical signals of a coil 50 with different amplitudes give the magnet 40 a reverse supporting force to ensure that the magnet 40 does not vibrate or the vibration amplitude is small, so that the first coil 50 vibrates to drive the diaphragm 20 to achieve sound.

In some embodiments of the present disclosure, the vibration and sound device 100 is provided with a first coil 50 and a second coil 60 at the same time. By controlling the energization state of the first coil 50 and the second coil 60, the vibration and sound device 100 can realize the vibration function respectively. Compared with the related need to set the vibration motor and the sound generator separately, the technical solution provided by the present disclosure realizes that the vibration motor and the sound generator are combined into one, so that it will not occupy a large internal part of the mobile terminal. The installation space also makes the layout of the vibration and sound device 100 inside the mobile terminal more flexible, and also saves the hardware cost of the mobile terminal, which is more conducive to the development of the mobile terminal to be light and thin.

Wherein, the vibration and sound device 100 can be used as a receiver to realize sound, or as a speaker to realize sound. In addition, some embodiments of the present disclosure combine a vibration motor and a sound generator that originally need to be separately provided. The vibration principle and sound generation principle of the vibration sound device 100 can be referred to related technologies. For example, when the vibration and sound device 100 is used as a receiver to generate sound, the first coil 50 can be a receiver circuit module connected to the main board. The specific circuit structure of the receiver circuit module and the electrical signal control of the first coil 50 can be referred to related technologies. To realize the receiver function, I won’t repeat it here.

It should be noted that when the vibrating and sounding device 100 works as a sounder, the magnet 40 can generate vibrations of a certain frequency to drive the vibrating and sounding device 100 to generate a certain vibration, so as to compensate and enhance the sense of hearing, and enhance the hearing. However, the vibration of the vibration and sound device 100 is small, so as not to affect the user's sense of holding the mobile terminal. When the vibration and sound device 100 works as a vibration motor, the diaphragm 20 can also be made to vibrate, so that the vibration and sound device 100 can play a signal of a specific vibration frequency to enhance the vibration feeling of the mobile terminal.

1 again, the two ends of the elastic member 30 are respectively connected to the magnet 40 and the first supporting plate 11, and the sum of the maximum height of the elastic member 30 and the height of the magnet 40 is less than the distance between the diaphragm 20 and the first supporting plate 11 That is to say, when the elastic member 30 is at the maximum extension limit, the magnet 40 at one end of the elastic member 30 will not interfere with the diaphragm 20, thereby preventing the diaphragm 20 from vibrating. In addition, the minimum height of the elastic member 30 is greater than the height of the second coil 60, so that even when the elastic member 30 is in a compressed state and is compressed to the maximum, the magnet 40 located at one end of the elastic member 30 will not interfere The second coil 60 prevents the magnet 40 from contacting the second coil 60 and hinders the normal movement of the magnet 40.

In some embodiments of the present disclosure, the sound outlet is provided on the first support plate 11 to ensure the normal operation of the vibrating sound device 100 when used as a sounder. As shown in Figure 1, in addition to the first support plate 11 for fixing the second coil 60 and the elastic member 30, the support 10 also includes a second support plate 12 connected to the first support plate 11, a sound hole and a second support plate 12 The supporting plates 12 are arranged adjacent to each other, so that the layout of the elastic member 30 and the second coil 60 on the first supporting plate 11 is more convenient. Of course, the sound hole can also be provided in other positions of the first support plate 11 or can be provided on the second support plate 12. Among them, the number of sound holes is not limited.

As an optional implementation of some embodiments of the present disclosure, the elastic member 30 may be a spring. Understandably, the spring may be a cylindrical shape with a receiving cavity formed in the middle. Optionally, the spring and the second coil 60 are arranged coaxially. As shown in FIG. 1, the second coil 60 is housed in the accommodating cavity of the spring; in this way, the structural features of the second coil 60 and the spring are rationally utilized, and at the same time The accommodating cavity of the spring can be used to limit and fix the second coil 60. Of course, the spring may also be housed in the second coil 60.

Optionally, the number of the elastic member 30 is at least one. For example, when the number of elastic members 30 is one, the arrangement described above may be adopted, and the spring is arranged coaxially with the second coil 60; when the number of elastic members 30 is greater than one, the second coil 60 may be It is arranged between any two elastic members 30, but the axis of the second coil 60 is located on the central axis of the magnet 40. Optionally, the number of the elastic members 30 is not less than 3 to better support the magnet 40.

2 and 3, in some embodiments of the present disclosure, the vibration and sound device 100 further includes a power amplifier circuit 70. The input end of the power amplifier circuit 70 is electrically connected to the main board 200 of the mobile terminal, and the output end of the power amplifier circuit 70 is connected to the first The coil 50 is electrically connected, and the power amplifier circuit 70 is used to amplify the electrical signal sent by the mobile terminal main board 200 and transmit it to the first coil 50, so that the vibrating sound device 100 realizes sound playback when working as a sound generator.

Please refer to FIG. 2, in an implementation of some embodiments of the present disclosure, the second coil 60 is electrically connected to the main board 200 of the mobile terminal. In this case, the output current of the main board 200 may be relatively large and can drive vibration. The sound generating device 100 realizes the function of a vibration motor. In this way, there is no need to additionally provide a driving circuit for driving the vibration of the vibration sound device, which simplifies the circuit layout in the mobile terminal and also saves the hardware cost of the mobile terminal.

Or, referring to FIG. 3, in another embodiment, the vibrating and sounding device 100 further includes a driving circuit 80. The input end of the driving circuit 80 is electrically connected to the main board 200 of the mobile terminal, and the output end of the driving circuit 80 is connected to the second coil. 60 is electrically connected, and the driving circuit 80 is used to amplify and transmit the electrical signal sent by the main board 200 to the second coil 60, so that the vibration and sound device 100 realizes vibration when working as a vibration motor.

Some embodiments of the present disclosure also provide a mobile terminal. The mobile terminal includes the vibrating and sounding device as described in the above embodiments, and has all the technical features of the vibrating and sounding device, and can achieve the same technical effect. To avoid repetition, I won't repeat it here.

It should be noted that, in the mobile terminal provided by some embodiments of the present disclosure, there are at least two vibration and sound emitting devices, of which at least one is used to implement the speaker function, and at least the other is used to implement the receiver function. For example, the number of vibrating and sounding devices is two, and the two vibrating and sounding devices are stacked up and down in the thickness direction of the mobile terminal. One of the vibrating and sounding devices is used to realize the receiver function, and the other is used to realize the speaker function And the size of the vibration and sound device for realizing the speaker function is larger than the size of the vibration and sound device for realizing the function of the receiver. Of course, both vibration and sound devices can realize the function of a vibration motor. By combining the vibration motor and the receiver or speaker into one device, the internal space of the mobile terminal is saved more, and the hardware cost of the mobile terminal is also saved.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article or device that includes the element.

The above are only specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present disclosure. It should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

A vibrating and sounding device includes:

A bracket, one side of the bracket is provided with a diaphragm, the diaphragm and the bracket form a containing space, and the bracket is provided with a sound hole;

A first coil, the first coil is located in the accommodating space, and the first coil is connected to the diaphragm;

A magnet, the magnet is arranged in the receiving space, and at least part of the magnet is located in the first coil;

An elastic member, one end of the elastic member is connected with the magnet, the other end of the elastic member is connected with the first inner surface of the bracket, and the first inner surface is arranged opposite to the diaphragm;

A second coil, the second coil is fixedly connected with the first inner surface, and the second coil is magnetically coupled with the magnet.
The vibration and sound device according to claim 1, wherein the second coil is electrically connected to a main board of the mobile terminal.
The vibration and sound device according to claim 2, further comprising a drive circuit, the input end of the drive circuit is electrically connected to the main board of the mobile terminal, and the output end of the drive circuit is electrically connected to the second coil.
The vibration and sound device according to claim 2 or 3, further comprising a power amplifier circuit, the input end of the power amplifier circuit is electrically connected to the main board of the mobile terminal, and the output end of the power amplifier circuit is electrically connected to the first coil .
The vibrating and sounding device according to claim 1, wherein the support comprises a first support plate disposed opposite to the diaphragm, and the first inner surface is located on the first support plate;

The sum of the maximum height of the elastic member and the height of the magnet is less than the distance between the diaphragm and the first support plate, and the minimum height of the elastic member is greater than the height of the second coil.
The vibration and sound device according to claim 5, wherein the sound hole is provided on the first support plate, the support further comprises a second support plate connected to the first support plate, and the sound The hole is arranged adjacent to the second supporting plate.
The vibration and sound device according to claim 1, wherein the elastic member is a spring, and the spring is arranged coaxially with the second coil.
The vibration and sound device according to claim 1, wherein the number of the elastic member is at least one.
A mobile terminal comprising the vibration and sound device according to any one of claims 1-8.
The mobile terminal according to claim 9, wherein the number of the vibrating and sounding devices is at least two, of which at least one is used to implement a speaker function, and at least one other is used to implement a receiver function, and is used to implement a speaker function. The size of the vibration and sound device is larger than the size of the vibration and sound device for realizing the function of the receiver.