WO2020181888A1

WO2020181888A1 - Electronic apparatus

Info

Publication number: WO2020181888A1
Application number: PCT/CN2019/129719
Authority: WO
Inventors: 葛连山; 王兴龙
Original assignee: 歌尔股份有限公司
Priority date: 2019-03-14
Filing date: 2019-12-30
Publication date: 2020-09-17
Also published as: CN111698620A

Abstract

Disclosed is an electronic apparatus. The apparatus comprises an apparatus housing and a sound producing device disposed in the apparatus housing. The sound producing device comprises a device housing, a magnetic circuit system disposed in the device housing, a first vibration system, and a second vibration system. The first vibration system and the second vibration system can radiate sound in a full frequency range of hearing of a user. The first vibration system radiates sound to the outside of the apparatus housing in a first direction, and the second vibration system radiates sound to the outside of the apparatus housing in a second direction. The first vibration system operates in a front sound outlet mode, and the second vibration system operates in a side sound outlet mode. A phase difference between the first vibration system and the second vibration system at respective sound outlet holes thereof is [0, π/2]. A high-frequency cutoff frequency of the first vibration system is greater than or equal to 6 kHz, and is greater than that of the second vibration system.

Description

An electronic device

Technical field

The present invention relates to the technical field of electro-acoustic conversion, and more specifically, to an electronic device.

Background technique

In order to provide a better acoustic experience in electronic equipment, several low frequency speaker units and tweeter units are usually installed in the equipment. Although this setting method can obtain the expected acoustic performance, the number of speaker units is large, and the space inside the electronic device is large, which affects the layout of other components in the electronic device.

Therefore, it is necessary to provide a new technical solution to solve the above technical problems.

Summary of the invention

An object of the present invention is to provide a new technical solution for electronic equipment.

According to a first aspect of the present invention, an electronic device is provided. The electronic device includes: a housing; a sounding device arranged in the housing, the sounding device comprising a housing, a magnetic circuit system arranged in the housing, a first vibration system and a second vibration system, the first vibration system And the second vibration system are located on opposite sides of the magnetic circuit system, and cooperate with the magnetic circuit system. The first vibration system and the second vibration system can operate at the full frequency of the user’s hearing Sound is radiated within the range, the first vibration system radiates sound outside the housing in a first direction, and the second vibration system radiates sound outside the housing in a second direction; the first vibration system is positive The sound production mode, the second vibration system is a side sound production mode, the phase difference between the first vibration system and the second vibration system at the respective sound holes is [0, π/2], the The high-frequency cut-off frequency of the first vibration system is greater than or equal to 6 kHz, and the high-frequency cut-off frequency of the first vibration system is greater than the high-frequency cut-off frequency of the second vibration system.

Optionally, the included angle between the first direction and the second direction is 45°-135°.

Optionally, there are multiple sound emitting devices, and they are arranged symmetrically with respect to the center line of the electronic device.

Optionally, the vibration direction of the sound emitting device is perpendicular to the main plane of the electronic device, or the vibration direction of the sound emitting device is parallel to the main plane of the electronic device.

Optionally, the electronic device includes an interactive operation part and a side wall located at a side of the interactive operation part, the first vibration system radiates sound from one side of the interactive operation part, and the second vibration system Sound is radiated outward from one side of the side wall.

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

Optionally, the first vibration system is configured to compensate the second vibration system after the high frequency cutoff frequency of the second vibration system.

Optionally, the first vibration system is configured to compensate the second vibration system when abnormal attenuation of the second vibration system occurs within the resonance frequency range.

Optionally, the first vibration system and the second vibration system are independently controlled.

Optionally, the sounding device is rectangular and includes two opposite long sides and two short sides. The magnetic circuit system includes a central magnet and a side magnet. A magnetic yoke is provided in the housing, and the guide The yoke includes a frame portion having a hollow area and an intermediate portion opposite to the hollow area and higher than the frame portion. There is a gap between the center portion and the frame portion, and at least The opposite ends are fixedly connected to the frame body portion by a connecting wall, the center magnet is arranged on the center portion, and the side magnets are arranged on a portion of the frame body portion parallel to the long sides . .

Optionally, the electronic device is a notebook computer, a tablet computer, a mobile phone, a smart watch, a game console, a walkie-talkie, or a smart speaker.

According to an embodiment of the present disclosure, the electronic device can realize a surround sound effect.

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 thereof are used to explain the principle of the present invention.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.

Fig. 2 is a cross-sectional view of a laterally arranged sounding device according to an embodiment of the present disclosure.

Fig. 3 is a cross-sectional view of a longitudinally arranged sound emitting device according to an embodiment of the present disclosure.

Figures 4-7 are diagrams showing sound effects of electronic devices in different scenarios according to an embodiment of the present disclosure.

Fig. 8 is a superimposed effect diagram of two vibration systems according to an embodiment of the present disclosure.

Fig. 9 is a compensation effect diagram of two vibration systems according to an embodiment of the present disclosure.

detailed description

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, numerical expressions and numerical values of the components and steps 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 the examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as limiting. 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, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

According to an embodiment of the present disclosure, an electronic device is provided. The electronic device can be, but is not limited to, a laptop, a tablet, a mobile phone, a smart watch, a game console, a walkie-talkie, or a smart speaker. Let's take a notebook as an example.

As shown in FIG. 1, the electronic device includes a housing and a sound generating device 10 arranged in the housing.

As shown in FIGS. 2-3, the sound generating device 10 includes a housing 29, a magnetic circuit system arranged in the housing 29, a first vibration system and a second vibration system. The housing 29 has a cavity inside. The magnetic circuit system is fixed in the cavity. The magnetic circuit system is used to form a magnetic gap. The first vibration system and the second vibration system are respectively located on opposite sides of the magnetic circuit system and cooperate with the magnetic circuit system. After being energized, the two vibration systems are subjected to ampere force in the magnetic field of the magnetic circuit system to vibrate.

The first vibration system and the second vibration system can radiate sound in the full frequency range of the user's hearing. Compared with radiating sound only in high or low frequency bands, the sound generating device has a wider sound range.

The first vibration system radiates sound to the outside of the housing along a first direction. The second vibration system radiates sound to the outside of the casing in a second direction. The first direction and the second direction are different directions with respect to the housing.

The first vibration system is a positive vocal sounding mode. For example, a positive sound hole 12 is provided on the housing 29, and the positive sound hole 12 is located directly above the first vibration system. The second vibration system is a side-out sounding mode. For example, the second vibration system radiates sound outward through the side sound channel 13 of the housing.

The phase difference between the first vibration system and the second vibration system at the sound outlet is [0, π/2], the high-frequency cutoff frequency Fh of the first vibration system _{is positive} ≥ 6kHz, and the first vibration The high-frequency cut-off frequency of the system is greater than the high-frequency cut-off frequency of the second vibration system. As is well known by those skilled in the art, the acoustic signal is a periodic signal, and the interval can be expanded to [0±2nπ, π/2±2nπ], n=0,1,2,3.... The phase difference of the acoustic signals generated by the first vibration system and the second vibration system in the frequency band before 6kHz at the respective sound holes is between [0,π/2], and the phase difference in the frequency band after 6kHz is also [ 0, π/2].

In the resonance frequency range, the first vibration system and the second vibration system are superimposed on each other. This makes the sounding device louder.

The first vibration system is configured to compensate the second vibration system after the high frequency cutoff frequency of the second vibration system. As shown in Figure 8, a is the frequency response curve of the side sound, that is, the frequency response curve of the second vibration system. b is the positive sound frequency response curve, that is, the frequency response curve of the first vibration system. c is the total frequency response curve.

It can be seen from the a curve that the curve drops rapidly after the high-frequency cut-off frequency. This attenuation tendency is due to the resonance of the side sound channel. In this example, since the high-frequency cut-off frequency of the first vibration system is greater than the high-frequency cut-off frequency of the second vibration system, the first vibration system can effectively compensate for the attenuation of the second vibration system after the high-frequency cut-off frequency. Thus, the high-frequency performance of the sound generating device is effectively improved, as shown in curve c in Fig. 8.

In this example, the sound generating device 10 includes two vibration systems. The two vibration systems share a magnetic circuit system and respectively radiate sound in different directions, so higher acoustic performance can be obtained at a smaller amplitude and reliable High sex.

In addition, the sound generating device 10 is low in height, small in size, and highly adaptable.

In addition, the two vibration systems radiate sound in different directions, which can play a surround sound effect.

Due to the structural characteristics of the side sound channel 13, when the second vibration system is at high frequencies, crests and troughs will appear, which will reduce the sound effect of the sound generating device.

In an example, the first vibration system is configured to compensate the second vibration system when the second vibration system has abnormal attenuation within the resonance frequency range. In this way, the wave trough can be effectively compensated, so that the sound effect of the electronic device is better.

As shown in Figure 9, curve a is the abnormal frequency response curve of the second vibration system; curve b is the compensation frequency response curve of the first vibration system; c is the frequency response curve after superposition. In this example, due to the structural characteristics of the sound generating device, especially the structural characteristics of the side sound channel, the frequency response curve of the second vibration system has a trough in a certain frequency band of the resonance frequency range. By adjusting the output power of the first vibration system, the second vibration system is compensated. In this way, after the frequency response curves of the two vibration systems are superimposed, the trough of the second vibration system has been effectively compensated and almost disappeared, as shown in the curve c in Figure 9.

In an example, the included angle between the first direction and the second direction is 45°-135°. Compared with the two vibration systems radiating sound outward in the same direction or in the opposite direction, within the included angle range, the sounds emitted by the two vibration systems will not interfere with each other, and the superposition effect is good.

For example, the first direction and the second direction are perpendicular, so that the sound radiated by the two vibration systems will not cancel each other, and the sound superimposition effect will be better.

As shown in Figure 3, the two vibration systems are the first vibration system and the second vibration system. The first vibration system includes a first voice coil 16, a first reinforcement layer 15, a first diaphragm 14 and a first centering support piece 17 connected together. The second vibration system includes a second voice coil 21, a second reinforcement layer 20, a second diaphragm 19 and a second centering support piece 22 connected together. The first diaphragm 14 and the second diaphragm 19 are folded ring diaphragms. The first reinforcement layer 15 is fixed at the center of the first diaphragm 14. The second reinforcement layer 20 is fixed at the center of the second diaphragm 19.

In this example, the magnetic circuit system is a three magnetic circuit system, including a center magnet 27 and side magnets 28 located on both sides of the center magnet. The whole of the sound generating device is rectangular, including two long sides and two short sides that are arranged oppositely. The long side is parallel to the long axis, and the short side is parallel to the short axis. The length of the long side is greater than the length of the short side. The side magnet 28 extends along the long side. The center magnet 27 extends along the long side. The two side magnets 28 are respectively located on opposite sides of the center magnet 29.

The sound device also includes a magnetic yoke. Part of the magnetic yoke is embedded in the housing 29. The magnetically conductive yoke includes a frame portion having a hollow area and a middle portion opposite to the hollow area and higher than the frame portion, a gap is provided between the center portion and the frame portion, and the center At least the opposite ends of the part are fixedly connected to the frame body part through the connecting wall, the center magnet is arranged on the central part, and the side magnets are arranged on the long sides of the frame body part. Parallel parts. Specifically, the second side washer 26 is a frame part. The basin frame 24 is the central part. The second side washer 26 has a ring shape and is connected with the basin frame 24 at two short sides to form a connecting wall, and the second side washer 26 is spaced from the basin frame 24 at the long side. An escape space is formed on the outer side of the part where the second side washer 26 and the basin frame 24 are connected, and a magnetic gap is formed on the inner side.

The second side washer 26 and the basin frame 24 are located on different planes. For example, the second side washer 26 and the basin frame 24 are both metal materials, and they are integrally formed. For example, on the long side, the inner side of the second side washer 26 is flush with the outer side of the basin frame 24, which can effectively reduce the width of the magnetic gap and increase the magnetic field strength. A center magnet 27 is provided on the basin frame 24. A center washer 30 is provided on the side of the center magnet 27 opposite to the basin frame 24. The basin frame 24 not only functions as a support, but also functions as a magnetic conductor. The second side washer 26 is embedded in the housing 29 by insert injection molding. A side magnet 28 is provided on the second side washer 26.

The first side washer 25 is fixed on the side of the side magnet 28 opposite to the second side washer 26. The free end of the first voice coil 16 is located in the magnetic gap formed by the basin frame 24 and the first side washer 25. The free end of the second voice coil 21 is located in the magnetic gap formed by the center washer 30 and the second side washer 26. The first voice coil 16 and the second voice coil 21 are alternately inserted into the magnetic gap, which effectively saves internal space, and the height of the sound generating device 10 can be made smaller.

In addition, because the first voice coil 16 and the second voice coil 21 are arranged in a staggered manner, the two

voice coils

16, 21 will not interfere with each other, ensuring that the amplitude of the first vibration system and the second vibration system are not affected, and the sound device Loudness is higher.

In other examples, the entire sounding device 10 has a racetrack shape. The arc side is the short side. The straight side is the long side.

In an example, as shown in FIGS. 4-7, there are multiple sound emitting devices 10, which are arranged symmetrically with respect to the center line of the electronic device. For example, the centerline is the centerline of the notebook in the width direction (as shown by the dotted line in Figure 4). There are two sound generating devices 10, and they are symmetrically arranged on the left and right sides of the notebook. This arrangement makes the surround sound effect of the electronic device better.

In other examples, the two sound emitting devices 10 can also be arranged symmetrically with respect to the center line of the notebook along the length direction, that is, on the upper and lower sides of the notebook. In this way, a good surround sound effect can also be achieved.

In an example, as shown in FIG. 4, the vibration direction of the sound emitting device 10 is perpendicular to the main plane of the electronic device. The main plane is the plane of the main body of the electronic device when in use. The interactive operation part is located on the main plane. For example, the interactive operation unit is a keyboard, a touch screen, etc. For example, the plane where the keyboard 11 of the notebook is located, the plane where the screen of the tablet computer is located, and so on. In this example, the first vibration system emits sound from the main plane, and the second vibration system emits sound from the side of the housing.

For example, as shown in FIG. 1, the plane where the keyboard 11 of the notebook is located is the main plane, and the side wall 18 of the side of the keyboard 11 is the main plane. The first vibration system radiates sound from one side of the keyboard 11 outward. The second vibration system radiates sound outward from one side of the side wall 18.

It may also be that the vibration direction of the sound emitting device 10 is parallel to the main plane of the electronic device. In this example, the first vibration system emits sound from the side of the housing, and the second vibration system emits sound from the main plane. Both of the above methods can achieve surround sound effects.

In an example, the vibration directions of the first vibration system and the second vibration system are opposite. This vibration method can effectively offset the vibration of the electronic device caused by vibration.

In an example, the first vibration system and the second vibration system are independently controlled. In this way, the electronic device can realize multiple application scenarios. As shown in Fig. 4, in this example, the electronic device includes two

sound emitting devices

10a, 10b. The two vibration systems of each sounding

device

10a or 10b sound from the front and the side at the same time, so as to realize full-angle sound.

As shown in FIG. 5, in this example, the first vibration system of the two

sound emitting devices

10a, 10b works, and the second vibration system does not work, thereby forming a front sound source and realizing front sounding of the electronic device.

As shown in FIG. 6, in this example, the second vibration system of the sound emitting device 10a located on the left side works, and the first vibration system does not work. The sound emitting device 10b on the right side does not work, thereby forming a left side sound source, realizing the left side of the electronic device to produce sound.

As shown in FIG. 7, in this example, the second vibration system of the sound emitting device 10b located on the right side works, and the first vibration system does not work. The sound emitting device 10a on the left side does not work, thereby forming a sound source on the right side, and realizing the right side sound of the electronic device

By switching the above-mentioned multiple sound source modes according to different playback contents, the surround sound effect of the electronic device can be realized, and the user experience is improved.

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

An electronic device, which includes:

case;

A sound generating device arranged in the housing, the sound generating device comprising a housing, a magnetic circuit system arranged in the housing, a first vibration system and a second vibration system, the first vibration system and the second vibration system respectively Located on opposite sides of the magnetic circuit system and matched with the magnetic circuit system, the first vibration system and the second vibration system are configured to radiate sound within the full frequency range of the user’s hearing, so The first vibration system radiates sound to the outside of the housing in a first direction, and the second vibration system radiates sound to the outside of the housing in a second direction;

The first vibration system is a positive sounding mode, the second vibration system is a side sounding mode, and the phase difference between the first vibration system and the second vibration system at the respective sound holes is [ 0, π/2], the high-frequency cut-off frequency of the first vibration system is greater than or equal to 6 kHz, and the high-frequency cut-off frequency of the first vibration system is greater than the high-frequency cut-off frequency of the second vibration system.
The electronic device according to claim 1, wherein the angle between the first direction and the second direction is 45°-135°.
The electronic device according to claim 1, wherein the sound emitting device is plural and is arranged symmetrically with respect to the center line of the electronic device.
The electronic device according to claim 1, wherein the vibration direction of the sound emitting device is perpendicular to the main plane of the electronic device, or the vibration direction of the sound device is parallel to the main plane of the electronic device.
The electronic device according to claim 1, wherein the electronic device comprises an interactive operation part and a side wall located at a side of the interactive operation part, and the first vibration system is directed from a side of the interactive operation part to Sound is externally radiated, and the second vibration system radiates sound from one side of the side wall.
The electronic device according to claim 1, wherein the vibration directions of the first vibration system and the second vibration system are opposite.
The electronic device according to claim 1, wherein the first vibration system is configured to compensate the second vibration system after the high frequency cutoff frequency of the second vibration system.
The electronic device according to claim 1, wherein the first vibration system is configured to compensate for the second vibration system when abnormal attenuation of the second vibration system occurs in the resonance frequency range.
The electronic device according to claim 1, wherein the first vibration system and the second vibration system are independently controlled.
The electronic device according to claim 1, wherein the sound emitting device is rectangular and includes two opposite long sides and two short sides, and the magnetic circuit system includes a center magnet and a side magnet, which are arranged in the housing There is a magnetically conductive yoke, the magnetically conductive yoke includes a frame portion with a hollow area and a middle portion opposite to the hollow area and higher than the frame portion, between the center portion and the frame portion A gap, at least two opposite ends of the central part are fixedly connected to the frame body part through a connecting wall, the central magnet is arranged on the central part, and the side magnets are arranged on the frame body The part of the part parallel to the long side.
The electronic device according to claim 1, wherein the electronic device is a notebook computer, a tablet computer, a mobile phone, a smart watch, a game console, a walkie-talkie, or a smart speaker.