WO2021135691A1

WO2021135691A1 - Sound production device

Info

Publication number: WO2021135691A1
Application number: PCT/CN2020/129412
Authority: WO
Inventors: 蔡晓东; 张鹏
Original assignee: 歌尔股份有限公司
Priority date: 2019-12-31
Filing date: 2020-11-17
Publication date: 2021-07-08
Also published as: CN110972038A

Abstract

The present invention provides a sound production device, comprising: a frame provided with at least a first mounting through hole and a second mounting through hole, wherein the first mounting through hole has a first vibration end and a first magnetic circuit end, the second mounting through hole has a second vibration end and a second magnetic circuit end, the first vibration end and the second magnetic circuit end are located at one side of the frame, and the first magnetic circuit end and the second vibration end are located at the other side of the frame; and at least a first sound production unit and a second sound production unit, wherein the first sound production unit has a first vibration system mounted at the first vibration end and a first magnetic circuit system mounted at the first magnetic circuit end, the second sound production unit has a second vibration system mounted at the second vibration end and a second magnetic circuit system mounted at the second magnetic circuit end, the first sound production unit is a high-frequency unit, the second sound production unit is a low-frequency unit, and resonance frequency F₀ of the first sound production unit is greater than resonance frequency F₀' of the second sound production unit. Two sound production units that are reversely mounted simultaneously work to counteract part of the vibration, thereby reducing the vibration of the sound production device.

Description

A sounding device

Technical field

The present invention relates to the field of acoustics, and more specifically, the present invention relates to a sound generating device.

Background technique

In the audio system of smart mobile devices such as tablet computers, mobile phones, etc., in order to achieve perfect sound effects, a combination of a woofer and a tweeter or a combination of multiple woofers and multiple tweeters is generally adopted. This solution can fully restore the low-frequency and high-frequency components of music, fully expand the bandwidth, and achieve perfect sound quality. And multiple speakers work at the same time, the audio loudness can be greatly improved, increasing the volume of the device and the overall sound effect.

However, when multiple vibration units are working at the same time, due to the working principle of the moving coil speaker, the speaker's own bracket will produce certain vibrations. The casing of the smart mobile device will vibrate synchronously with the speaker bracket. The vibration feels strong, which greatly reduces the terminal consumption. User experience.

Therefore, it is necessary to improve the existing sound generating device to overcome the above-mentioned defects.

Summary of the invention

An object of the present invention is to provide a sound generating device that solves the problem of strong vibration of multiple speakers.

A sounding device, including:

The frame is provided with at least a first installation through hole and a second installation through hole, the first installation through hole has a first vibration end and a first magnetic circuit end, and the second installation through hole has a second The vibrating end and the second magnetic circuit end, the first vibrating end and the second magnetic circuit end are located on one side of the frame, and the first magnetic circuit end and the second vibrating end are located on the side of the frame The other side;

At least a first sounding unit and a second sounding unit, the first sounding unit includes a first vibration system and a first magnetic circuit system, the first vibration system is installed at the first vibration end of the first installation through hole, The first magnetic circuit system is installed at the first magnetic circuit end of the first installation through hole;

The second sound generating unit includes a second vibration system and a second magnetic circuit system, the second vibration system is installed at the second vibration end of the second mounting through hole, and the second magnetic circuit system is installed at the The second magnetic circuit end of the second mounting through hole;

The first sounding unit is a high-frequency unit, the second sounding unit is a low-frequency unit, and the resonance frequency F _{0 of} the first sounding unit is greater than the resonance frequency F ₀ ′ of the second sounding unit.

Optionally, the frame has a rectangular structure, and the first mounting through hole and the second mounting through hole are arranged side by side on the frame.

Optionally, the first sounding unit and the second sounding unit are both rectangular structures, and the long axis direction of the first sounding unit is parallel or perpendicular to the long axis direction of the second sounding unit.

Optionally, the relationship between the _{resonance frequency F 0} of the first sound emitting unit and the resonance frequency F ₀ _{′ of the second sound emitting unit is F 0} ≥ 2F ₀ ′.

Optionally, the sound radiation area Sd of the first sound emitting unit is smaller than the sound radiation area Sd' of the second sound emitting unit.

Optionally, the equivalent mass Mms of the first vibration system is smaller than the equivalent mass Mms' of the second vibration system.

Optionally, the first vibration system includes a first diaphragm, and the second vibration system includes a second diaphragm;

Along the direction from one side of the frame to the other side, the first diaphragm and the second diaphragm are located in different planes.

Optionally, the vibration directions of the first diaphragm and the second diaphragm are opposite.

Optionally, the first vibration system further includes a first voice coil, the second vibration system further includes a second voice coil, and the wire diameter of the voice coil of the first voice coil is smaller than that of the second voice coil. Voice coil wire diameter.

Optionally, the voice coil wire of the first voice coil is made of copper-clad aluminum, and the voice coil wire of the second voice coil is copper wire.

The beneficial effect of the technical solution of the present invention is that the two sounding units installed in reverse directions can work at the same time to offset part of the vibration, thereby reducing the vibration sensation of the sounding device.

Through the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear.

Description of the drawings

The drawings incorporated in the specification and constituting a part of the specification illustrate the embodiments of the present invention, and together with the description are used to explain the principle of the present invention.

Fig. 1 is a schematic structural diagram of a sound emitting device according to an embodiment of the present invention;

Figure 2 is an exploded view of a sound generating device according to an embodiment of the present invention;

Figure 3 is a schematic diagram of the installation of a diaphragm according to an embodiment of the present invention;

The labels in the figure are as follows: 10 frame; 101 first installation through hole; 102 second installation through hole; 20 first sound unit; 201 first voice coil; 202 first diaphragm; 203 first magnetic circuit component; 204 first Permeable plate; 205 first centering support piece; 30 second sounding unit; 301 second voice coil; 302 second diaphragm; 303 second magnetic circuit assembly; 304 second permeable plate; 305 second centering support sheet.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is actually only illustrative, and in no way serves as any limitation to the present invention and its application or use.

The technologies, methods, and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be regarded as part of the specification.

In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiment may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

The present invention provides a sound generating device, comprising: a frame provided with at least a first installation through hole and a second installation through hole, the first installation through hole having a first vibration end and a first magnetic circuit end The second mounting through hole has a second vibrating end and a second magnetic circuit end, the first vibrating end and the second magnetic circuit end are located on one side of the frame, and the first magnetic circuit end is connected to the The second vibrating end is located on the other side of the frame; at least a first sounding unit and a second sounding unit, the first sounding unit includes a first vibration system and a first magnetic circuit system, the first vibration system Installed at the first vibration end of the first installation through hole, the first magnetic circuit system is installed at the first magnetic circuit end of the first installation through hole; the second sounding unit includes a second vibration system and A second magnetic circuit system, the second vibration system is installed at the second vibration end of the second installation through hole, and the second magnetic circuit system is installed at the second magnetic circuit end of the second installation through hole; The first sounding unit is a high-frequency unit, the second sounding unit is a low-frequency unit, and the resonance frequency F _{0 of} the first sounding unit is greater than the resonance frequency F ₀ ′ of the second sounding unit.

Fig. 1 is a schematic structural diagram of a sound emitting device according to an embodiment of the present invention. It can be seen from the figure that the sound generating device of the present invention includes a frame 10. At least two installation through holes are provided on the frame, and the number of the installation through holes is adapted to the number of the sounding unit, which is used to install the components of the sounding unit. Fig. 2 is an exploded view of a sound generating device according to an embodiment of the present invention. Optionally, referring to FIG. 2, the frame includes a first mounting through hole 101 and a second mounting through hole 102. The sound emitting device includes at least two sound emitting units. The two sounding units are the first sounding unit 20 and the second sounding unit 30 respectively. Optionally, the first sound emitting unit and the second sound emitting unit have a similar structure. The first sounding unit is installed in the first installation through hole on the frame, and the second sounding unit is installed in the second installation through hole on the frame. Specifically, the first mounting through hole includes a first vibrating end and a first magnetic circuit end, the first sounding unit includes a first vibration system and a first magnetic circuit system, the first vibration system is installed on the first vibrating end of the frame, A magnetic circuit system is installed at the first magnetic circuit end of the frame. The second installation through hole includes a second vibration end and a second magnetic circuit end. The second sounding unit includes a second vibration system and a second magnetic circuit system. The second vibration system is installed on the second vibration end of the frame. The second magnetic circuit The system is installed at the second magnetic circuit end of the frame. The first vibration end and the second magnetic circuit end are located on the same side of the frame, and the first magnetic circuit end and the second vibration end are located on the other side of the frame. That is to say, the first sounding unit and the second sounding unit are installed on the frame in opposite directions. Optionally, the first sounding unit and the second sounding unit may convert electrical signals into sound signals through vibration, wherein the first sounding unit is a high-frequency unit, and the second sounding unit is a low-frequency unit. Optionally, in the present invention, the resonance frequency F _{0 of the} first sounding unit is set to be greater than the resonance frequency F ₀ 'of the second sounding unit. Under this design, the sounding device can simultaneously restore the high frequency and low frequency ranges. The sound signal, thereby improving the sound reproduction of the sound device.

In the present invention, a frame is provided in the sounding device, and the high-frequency first sounding unit and the low-frequency second sounding unit are reversely installed on the frame, which not only can broaden the frequency width of the sounding device, but also improve the sound effect of the sounding device, and make the sounding device It has a higher degree of sound reproduction, and can effectively improve the compactness of the sound device, reduce the volume of the sound device to meet the requirements of miniaturization, and at the same time, the first sound unit and the second sound unit installed in reverse can offset when working Partial vibration reduces the vibration intensity of the sound generating device and reduces the user's vibration feeling during use, which is beneficial to optimize the user's experience on the premise of ensuring the sound quality.

As an embodiment of the present invention, as shown in FIG. 2, the frame 10 can be arranged in a rectangular structure, and the first mounting through hole 101 and the second mounting through hole 102 on the frame can be arranged side by side. Specifically, the first mounting through hole and the second mounting through hole may be provided along the length direction of the frame. Arranging the installation through holes side by side can provide installation space for the installation of the sound unit, facilitate the installation of the sound unit, and help improve the production efficiency of the sound device. In addition, the sounding device formed by the rectangular structure frame has a higher compatibility with long-strip smart devices, such as mobile phones, and it is convenient for the sounding device to be installed in the smart device.

Optionally, referring to FIG. 2, the frame 10 may be provided in a stepped structure, that is, the first mounting through hole 101 and the second mounting through hole 102 of the frame are formed at different heights of the frame, and are formed at the junction of the two Step structure. The frame is set in a stepped structure. After the first sounding unit 20 and the second sounding unit 30 are installed on the frame, the upper end faces of the first sounding unit and the second sounding unit can be kept at the same height and the lower end faces are kept at the same height. In terms of height, this can greatly reduce the height of the sound generating device, thereby reducing the volume of the sound generating device.

In the present invention, as shown in FIG. 1 or FIG. 2, both the first sound emitting unit 20 and the second sound emitting unit 30 can be arranged in a rectangular structure. The long axis direction of the first sounding unit is installed in parallel with the long axis direction of the second sounding unit. Or, the long axis of the first sounding unit is perpendicular to the direction of the long axis of the second sounding unit. The rectangular structure of the first sounding unit and the second sounding unit can be adapted to the rectangular structure of the frame 10, increasing the proportion of the first mounting through hole 101 and the second mounting through hole 102 on the frame, and increasing the space in the sounding device Utilization rate is conducive to reducing the volume of the sound generating device. At the same time, the long axes of the first sounding unit and the second sounding unit are installed parallel or perpendicular to each other, which can improve the installation flexibility of the sounding unit.

As an embodiment of the present invention, the resonance frequency of the first sound unit 20 and the second resonance F ₀ is the frequency of the sound unit 30 F ₀ 'is set to F _₀ ≥2F _0', that is to say at least F ₀ F ₀ ' This can ensure the difference between the resonant frequency F ₀ of the first sounding unit and the resonant frequency F ₀ 'of the second sounding unit, so that the frequency of the sound emitted by the second sounding unit is maintained at a low frequency, and the first sounding unit The frequency of the emitted sound is maintained at the medium and high frequencies, which is beneficial to further broaden the bandwidth of the sound emitting device and promote the realization of perfect sound quality of the sound emitting device.

As an embodiment of the present invention, the sound radiation area Sd of the first sound emitting unit 20 is set to be smaller than the sound radiation area Sd′ of the second sound emitting unit 30. Among them, the sound radiation area of the sound unit refers to the effective area of the diaphragm in contact with the moving air during vibration. The larger the sound radiation area, the lower the resonance frequency of the sound unit. In order to ensure that the resonance frequency F _{0 of the} first sound emitting unit is greater than the resonance frequency F ₀ ′ of the second sound emitting unit, the sound radiation area Sd of the first sound emitting unit may be set to be smaller than the sound radiation area Sd′ of the second sound emitting unit. When Sd is less than Sd', it is beneficial for the sound generating device to increase its response frequency range and make the tone clearer and louder.

Optionally, the equivalent mass Mms of the first vibration system is smaller than the equivalent mass Mms' of the second vibration system. The equivalent mass of the vibration system is directly related to the resonance frequency of the sound unit. The smaller the equivalent mass, the higher the resonance frequency. Therefore, the equivalent mass Mms of the first sounding unit 20 can be set to be smaller than the equivalent mass Mms' of the second sounding unit 30, which can ensure that the resonance frequency F _{0 of the} first sounding unit is greater than the resonance frequency of the second sounding unit. F ₀ ', thereby ensuring the audio frequency width of the sounding device.

In the sound generating device of the present invention, as shown in FIG. 2, the first vibration system includes a first diaphragm 202. Similarly, the second vibration system includes a second diaphragm 302. When the first sounding unit and the second sounding unit are installed on the frame in reverse, there is a distance between the first diaphragm and the second diaphragm along the direction from one side of the frame to the other side, that is, the first diaphragm And the second diaphragm are located in different planes. For example, as shown in FIG. 3, the first diaphragm and the second diaphragm are respectively flush with the two end surfaces of the frame 10.

Optionally, the vibration directions of the first diaphragm and the second diaphragm are opposite. As an embodiment of the present invention, the first diaphragm 202 of the first sound emitting unit 20 and the second diaphragm 302 of the second sound emitting unit 30 vibrate in opposite directions. In this way, when the first sounding unit and the second sounding unit work at the same time, the first and second vibrating diaphragms that vibrate in the opposite direction can offset part of the vibration of the two sounding units, so as to reduce the vibration feeling of the sounding device, which is beneficial to the user Get a good experience.

As an embodiment of the present invention, as shown in FIG. 2, the first sounding unit 20 includes a first voice coil 201, and the second sounding unit 30 includes a second voice coil 301. The first voice coil is connected to the first diaphragm 202, and the second voice coil is connected to the second diaphragm 302. The first voice coil and the second voice coil are fed with alternating electrical signals, and the voice coil vibrates under the action of the magnetic field, which respectively drives the first diaphragm and the second diaphragm to vibrate, thereby realizing sound. In the present invention, the diameter of the voice coil wire of the first voice coil is set to be smaller than the diameter of the voice coil wire of the second voice coil, so that the quality of the first voice coil can be made smaller than that of the second voice coil when the two voice coil wires are equal in length. The quality of the second voice coil. This design method is beneficial to ensure that the equivalent mass Mms of the first vibration system is smaller than the equivalent mass Mms' of the second vibration system, thereby ensuring that the resonance frequency F _{0 of the} first sounding unit is greater than the resonance frequency F ₀ 'of the second sounding unit.

As an embodiment of the present invention, the voice coil wire of the first voice coil 201 may be made of copper-clad aluminum material, and the voice coil wire of the second voice coil 301 is copper wire. Since the density of metal aluminum is less than that of metal copper, the quality of the first voice coil made of copper-clad aluminum is lower than that of copper wire voice coils, which can further reduce the quality of the first voice coil, thereby promoting the equivalent of the first vibration system The mass Mms is smaller than the equivalent mass Mms' of the second vibration system. At the same time, both the copper-clad aluminum voice coil wire and the copper voice coil wire have the characteristics of good conductivity and low material cost, which is beneficial to reduce the manufacturing cost of the voice coil.

Optionally, as shown in FIG. 2, the first sounding unit 20 includes a first magnetic circuit assembly 203, and the second sounding unit 30 includes a second magnetic circuit assembly 303. The first magnetic circuit assembly and the second magnetic circuit assembly are used to provide a magnetic gap for the first voice coil 201 and the second voice coil 301, respectively. An electrical signal is connected to the voice coil, which vibrates in the magnetic gap of the magnetic circuit assembly, and drives the diaphragm connected to it to vibrate, thereby realizing sound.

Optionally, as shown in FIG. 2, the first sounding unit 20 of the present invention further includes a first magnetic conductive plate 204, and the second sounding unit 30 further includes a second magnetic conductive plate 304. In the present invention, the thickness of the first magnetic conductive plate can be set to be smaller than the thickness of the second magnetic conductive plate, which can not only reduce the quality of the sound emitting device, but also ensure that the resonance frequency of the first sound emitting unit is greater than the resonance frequency of the second sound emitting unit .

Optionally, as shown in FIG. 2, the first sounding unit 20 of the present invention further includes a first centering support piece 205, and the second sounding unit 30 further includes a second centering support piece 305. The centering support plate is used to adjust the vibration direction of the diaphragm and suppress the polarization phenomenon through the mechanical restoring force. In the present invention, the resonance frequency of the first sounding unit is relatively high, the vibration amplitude is small, and the probability of polarization of the diaphragm is low. Therefore, the installation of the first centering support plate can be eliminated to simplify the structure of the first sounding unit and reduce The quality of the small sounding device.

In the present invention, by setting a frame in the sounding device, and simultaneously installing a high-frequency first sounding unit and a low-frequency second sounding unit on the frame, not only can the frequency width of the sounding device be widened, the sound effect of the sounding device is improved, and the sounding device has Higher sound reproduction, and can effectively improve the compactness of the sound device, reduce the volume of the sound device, so that it can meet the requirements of miniaturization. The first sounding unit and the second sounding unit installed in the reverse direction can offset part of the vibration at the same time, reduce the vibration intensity of the sounding device, reduce the vibration feeling of the sounding device, and greatly optimize the user experience under the premise of ensuring perfect sound quality.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims

A sound generating device, characterized in that it comprises:

The frame is provided with at least a first installation through hole and a second installation through hole, the first installation through hole has a first vibration end and a first magnetic circuit end, and the second installation through hole has a second The vibration end and the second magnetic circuit end, the first vibration end and the second magnetic circuit end are located on one side of the frame, and the first magnetic circuit end and the second vibration end are located on the side of the frame The other side;

At least a first sounding unit and a second sounding unit, the first sounding unit includes a first vibration system and a first magnetic circuit system, the first vibration system is installed at the first vibration end of the first installation through hole, The first magnetic circuit system is installed at the first magnetic circuit end of the first installation through hole;

The second sound generating unit includes a second vibration system and a second magnetic circuit system, the second vibration system is installed at the second vibration end of the second mounting through hole, and the second magnetic circuit system is installed at the The second magnetic circuit end of the second mounting through hole;

The first sounding unit is a high-frequency unit, the second sounding unit is a low-frequency unit, and the resonance frequency F 0 of the first sounding unit is greater than the resonance frequency F 0 ′ of the second sounding unit.
The sounding device according to claim 1, wherein the frame has a rectangular structure, and the first mounting through hole and the second mounting through hole are arranged side by side on the frame.
The sounding device according to claim 1, wherein the first sounding unit and the second sounding unit are both rectangular structures, and the direction of the long axis of the first sounding unit is the same as that of the second sounding unit. The long axis direction is parallel or perpendicular.
The sounding device according to claim 1, wherein the relationship between the resonance frequency F 0 of the first sounding unit and the resonance frequency F 0 'of the second sounding unit is F 0 ≥ 2F 0 '.
The sound emitting device according to claim 1, wherein the sound radiation area Sd of the first sound emitting unit is smaller than the sound radiation area Sd' of the second sound emitting unit.
The sounding device according to claim 1, wherein the equivalent mass Mms of the first vibration system is smaller than the equivalent mass Mms' of the second vibration system.
The sound emitting device according to claim 1, wherein the first vibration system includes a first diaphragm, and the second vibration system includes a second diaphragm;

Along the direction from one side of the frame to the other side, the first diaphragm and the second diaphragm are located in different planes.
8. The sound emitting device according to claim 7, wherein the vibration directions of the first diaphragm and the second diaphragm are opposite to each other.
The sounding device according to claim 1, wherein the first vibration system further comprises a first voice coil, the second vibration system further comprises a second voice coil, and the voice coil of the first voice coil The wire diameter is smaller than the wire diameter of the voice coil of the second voice coil.
The sounding device according to claim 9, wherein the voice coil wire of the first voice coil is made of copper-clad aluminum, and the voice coil wire of the second voice coil is copper wire.