CN113055791B

CN113055791B - Loudspeaker inner core, loudspeaker module and electronic equipment

Info

Publication number: CN113055791B
Application number: CN201911385395.0A
Authority: CN
Inventors: 金明昱; 于利刚; 苏杰; 张贝; 吴桂敏; 辜磊
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2022-10-28
Anticipated expiration: 2039-12-28
Also published as: WO2021129333A1; CN113055791A

Abstract

The application provides a speaker kernel, a speaker module and an electronic device. The loudspeaker core comprises a diaphragm, a first piezoelectric sheet and a second piezoelectric sheet. The vibrating diaphragm comprises a first surface and a second surface which are arranged in an opposite mode, and a first end face and a second end face which are arranged in an opposite mode. The first end face and the second end face are connected between the first surface and the second surface. The first piezoelectric patch is fixed to the first surface. The second piezoelectric sheet is fixed on the second surface. The projection of the first piezoelectric sheet on the first surface is partially overlapped with the projection of the second piezoelectric sheet on the first surface. The first piezoelectric sheet is arranged close to the first end face relative to the second piezoelectric sheet. The second piezoelectric sheet is arranged close to the second end face relative to the first piezoelectric sheet. The loudspeaker inner core, the loudspeaker module and the electronic equipment have a better sound production effect.

Description

Loudspeaker inner core, loudspeaker module and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to a loudspeaker kernel, a loudspeaker module and electronic equipment.

Background

Since the piezoelectric element has low power consumption and a thin size, the piezoelectric element is increasingly paid more attention to the field of acoustic devices. It is one of the research directions in the industry to improve the acoustic performance of the conventional acoustic device by fixing a piezoelectric element on a diaphragm of the acoustic device. However, due to the characteristics of the piezoelectric element, the vibration direction of the diaphragm may be different at different positions of the diaphragm at a single frequency during the vibration process, so that the sound production effect of the acoustic device at the frequency is poor.

Disclosure of Invention

The application provides a speaker kernel, a speaker module and electronic equipment with better sound effect.

In a first aspect, the present application provides a speaker core. The loudspeaker core comprises a diaphragm, a first piezoelectric sheet and a second piezoelectric sheet. The vibrating diaphragm comprises a first surface and a second surface which are arranged in a back-to-back manner, and a first end face and a second end face which are arranged in a back-to-back manner. The first end face and the second end face are connected between the first surface and the second surface. In one embodiment, the first end surface and the second end surface are two end surfaces of the diaphragm in an X direction. The first piezoelectric patch is fixed to the first surface. The second piezoelectric sheet is fixed on the second surface. The projection of the first piezoelectric sheet on the first surface is partially overlapped with the projection of the second piezoelectric sheet on the first surface. In other words, in the Z direction, the first piezoelectric sheet and the second piezoelectric sheet have a partially overlapped region and a partially non-overlapped region. The first piezoelectric patch is arranged close to the first end face relative to the second piezoelectric patch. The second piezoelectric sheet is arranged close to the second end face relative to the first piezoelectric sheet. It is understood that the first piezoelectric sheet and the second piezoelectric sheet are arranged in a staggered manner in the X direction.

In this embodiment, in a negative direction of the X axis, the first piezoelectric sheet may cover the diaphragm to a large extent, in a positive direction of the X axis, the second piezoelectric sheet may cover the diaphragm to a large extent, and in the Z direction, the first piezoelectric sheet and the second piezoelectric sheet have a partially overlapped region and a partially non-overlapped region, and at this time, in the X direction, most of the region of the diaphragm is covered by the first piezoelectric sheet or the second piezoelectric sheet, that is, in the X direction, the stiffness of most of the position of the diaphragm is more uniform. When the diaphragm receives an audio signal, the vibration directions of most positions of the diaphragm are consistent in the X direction. The sound quality of the sound emitted by the inner core of the loudspeaker is better, and the hearing sense of a user is also better.

In the conventional piezoelectric patch manufacturing process, the larger the area of the piezoelectric patch is, the higher the difficulty of the piezoelectric patch manufacturing process is. In this embodiment, the first piezoelectric sheet and the second piezoelectric sheet are arranged in a staggered manner in the X direction, so that the length of the first piezoelectric sheet in the X direction can be made smaller and the length of the second piezoelectric sheet in the X direction can also be made smaller, while the first piezoelectric sheet and the second piezoelectric sheet can cover most of the diaphragm. Therefore, the difficulty of the manufacturing process of the first piezoelectric sheet and the second piezoelectric sheet can be greatly reduced.

In one embodiment, the diaphragm further includes a third end surface and a fourth end surface that are disposed opposite to each other. The third end face and the fourth end face are connected between the first end face and the second end face, and the third end face and the fourth end face are connected between the first surface and the second surface. In one embodiment, the third end surface and the fourth end surface are two end surfaces of the diaphragm in the Y direction. The first piezoelectric sheet is arranged close to the third end face relative to the second piezoelectric sheet. The second piezoelectric patch is arranged close to the fourth end face relative to the first piezoelectric patch. It is understood that the first piezoelectric sheet and the second piezoelectric sheet are arranged to be offset in the Y direction.

It is understood that, in the positive direction of the Y-axis, the diaphragm has less exposed area relative to the first piezoelectric sheet, that is, the first piezoelectric sheet may cover the diaphragm to a greater extent. In the negative direction of the Y-axis, the diaphragm has less exposed area relative to the second piezoelectric sheet, that is, the second piezoelectric sheet may cover the diaphragm to a greater extent. In addition, in the Z direction, the first piezoelectric sheet and the second piezoelectric sheet have a partial overlapping region and a partial non-overlapping region. Therefore, in the Y direction, the exposed area of the diaphragm relative to the first piezoelectric patch and the second piezoelectric patch is small, and at this time, the rigidity of most positions of the diaphragm is relatively consistent. When the diaphragm receives an audio signal, the vibration directions of most positions of the diaphragm are consistent in the Y direction. The sound quality of the sound emitted by the loudspeaker inner core is better, and the hearing sense of a user is also better.

In this embodiment, the first piezoelectric sheet and the second piezoelectric sheet are arranged in a staggered manner in the Y direction, so that the length of the first piezoelectric sheet in the Y direction can be made smaller and the length of the second piezoelectric sheet in the Y direction can also be made smaller, while the first piezoelectric sheet and the second piezoelectric sheet can cover most of the diaphragm. Therefore, the difficulty of the manufacturing process of the first piezoelectric sheet and the second piezoelectric sheet can be greatly reduced.

In one embodiment, the first piezoelectric sheet and the diaphragm are similar in pattern. The first piezoelectric piece comprises a first outer side face and a second outer side face which are arranged in a back-to-back mode, and a third outer side face and a fourth outer side face which are arranged in a back-to-back mode. The first outer side face faces the first end face. The second outer side face faces the second end face. The third and fourth outer sides are connected between the first and second outer sides. The distance between the first outer side and the second outer side is a first length. The distance between the third outer side and the fourth outer side is a second length. A ratio of the first length to the second length is in a range of 0.6 to 0.9.

In this embodiment, the first piezoelectric sheet and the diaphragm are set to have similar patterns, and a ratio of a first length L1 to a second length L2 of the first piezoelectric sheet is in a range from 0.6 to 0.9, so that a multi-mode that vibration directions of the first piezoelectric sheet are inconsistent at medium and high frequencies is avoided, and thus, air pressure radiated by the speaker core is avoided being too small or zero. In other words, the sound pressure level of the loudspeaker kernel at the middle and high frequency is flat, and the sound production effect of the loudspeaker kernel is good.

In one embodiment, the second piezoelectric sheet is patterned similarly to the first piezoelectric sheet. In this case, the first piezoelectric sheet and the second piezoelectric sheet have substantially the same size. Therefore, the method and the device do not obviously improve the material types of the loudspeaker core, and are beneficial to simplifying the preparation process of the loudspeaker core.

In one embodiment, the speaker core further includes a first frame, a second frame, a first support block, and a second support block. The first frame and the second frame are both hollow structures. The first frame is connected to the periphery of the first surface. The second frame is connected to the periphery of the second surface. One surface of the first supporting block is connected to the inner side surface of the first frame, and the other surface of the first supporting block is connected to the first surface. The first support block is arranged in a staggered manner with the first piezoelectric patch and the second piezoelectric patch. One surface of the second supporting block is connected to the inner wall surface of the second frame, and the other surface of the second supporting block is connected to the second surface. The second supporting block is opposite to the first supporting block. The second supporting block, the first piezoelectric patch and the second piezoelectric patch are arranged in a staggered mode.

In this embodiment, the first support block and the second support block are connected to the diaphragm together, and the first support block and the second support block are both arranged to be staggered from the first piezoelectric plate, and the first support block and the second support block are both arranged to be staggered from the second piezoelectric plate, so that the area of the diaphragm relative to the exposed area of the first piezoelectric plate and the exposed area of the second piezoelectric plate are further reduced. At this time, when the diaphragm receives the audio signal, the rigidity of most positions of the diaphragm is relatively consistent, that is, the vibration directions of most positions of the diaphragm are consistent. The sound quality of the sound emitted by the inner core of the loudspeaker is better, and the hearing sense of a user is also better.

In one embodiment, the first piezoelectric sheet is made of one of magnesium-aluminum alloy, aluminum-magnesium alloy, or aluminum. It is understood that magnesium-aluminum alloy means that the composition ratio of magnesium is higher than that of aluminum. Aluminum magnesium alloy means that the composition ratio of aluminum is higher than that of magnesium. At this time, the density of the first piezoelectric sheet is small, that is, the rigidity of the first piezoelectric sheet is small. When the first piezoelectric sheet is fixed on the first surface of the diaphragm, the overall rigidity of the diaphragm and the first piezoelectric sheet is low. When the diaphragm vibrates according to the audio signal, the amplitude of the diaphragm is larger, the sound pressure level of the sound emitted by the loudspeaker kernel is higher, and the sound heard by the user is clearer.

In one embodiment, the second piezoelectric sheet may be made of magnesium-aluminum alloy, aluminum-magnesium alloy, or aluminum. At this time, the density of the second piezoelectric sheet is small, that is, the rigidity of the second piezoelectric sheet is small. When the second piezoelectric sheet is fixed on the second surface of the diaphragm, the overall rigidity of the diaphragm, the first piezoelectric sheet and the second piezoelectric sheet is low. When the diaphragm vibrates according to the audio signal, the amplitude of the diaphragm is large, the sound pressure level of the sound emitted by the loudspeaker inner core is high, and the sound heard by the user is clearer.

In one embodiment, the speaker core further comprises a first bezel. The first frame is of a hollow structure. The first frame is connected to the periphery of the first surface. The first piezoelectric sheet has a first outer side. The first outer side face faces the first end face. The first frame has a first inner side. The first inner side surface is located between the first end surface and the first outer side surface. The distance between the first medial side and the first lateral side is in the range of 1 millimeter to 5 millimeters.

In this embodiment, the distance between the first outer side surface and the first inner side surface is small. In other words, in the negative direction of the X axis, the first piezoelectric sheet can be close to the first frame to a large extent. At this time, the exposed area of the diaphragm relative to the first piezoelectric sheet is small, the vibration directions of most positions of the diaphragm are consistent, and the sound quality of the loudspeaker kernel is good.

In one embodiment, the second piezoelectric sheet has a fifth outer side. The fifth outer side face faces the first end face. The distance between the fifth outer side and the first outer side is in the range of 0.2 mm to 5 mm.

In this embodiment, under the condition that it is ensured that the first piezoelectric patch and the second piezoelectric patch can normally drive the diaphragm to vibrate and the diaphragm can normally sound, the length of the first piezoelectric patch in the X direction can be reduced by 0.2 mm to 5 mm, and the length of the second piezoelectric patch in the X direction can be reduced by 0.2 mm to 5 mm. In other words, in the X direction, the lengths of the first piezoelectric sheet and the second piezoelectric sheet may be reduced by a larger length. In this way, the difficulty of the manufacturing process of the first piezoelectric sheet and the second piezoelectric sheet can be greatly reduced.

In a second aspect, the present application provides a speaker core. The loudspeaker kernel comprises a diaphragm and a first piezoelectric sheet. The diaphragm has a first surface. The first piezoelectric patch is fixed to the first surface. The first piezoelectric sheet and the diaphragm are similar in pattern. The first piezoelectric piece comprises a first outer side face and a second outer side face which are arranged in a back-to-back mode, and a third outer side face and a fourth outer side face which are arranged in a back-to-back mode. The third outer side surface and the fourth outer side surface are connected between the first outer side surface and the second outer side surface. The distance between the first outer side face and the second outer side face is a first length. The distance between the third outer side face and the fourth outer side face is a second length. A ratio of the first length to the second length is in a range of 0.6 to 0.9.

In this embodiment, the first piezoelectric sheet and the diaphragm are set to have similar patterns, and a ratio of a first length L1 to a second length L2 of the first piezoelectric sheet is in a range from 0.6 to 0.9, so that a multi-mode with inconsistent vibration directions at a middle-high frequency is avoided, and further, air pressure radiated by the speaker core is avoided to be too small or zero. In other words, the sound pressure level of the loudspeaker kernel at the middle-high frequency is relatively flat, and the sound production effect of the loudspeaker kernel is better.

In one embodiment, the speaker core further comprises a second piezoelectric patch. The diaphragm also includes a second surface. The second surface is opposite to the first surface. The second piezoelectric sheet is fixed on the second surface. The second piezoelectric patch is aligned with the first piezoelectric patch.

In this embodiment, the second piezoelectric plate is fixed on the second surface, so that the second piezoelectric plate and the first piezoelectric plate cooperate with each other to increase the vibration amplitude of the diaphragm, thereby increasing the sound pressure level of the speaker core, that is, the speaker core can emit a larger sound.

In one embodiment, the second piezoelectric sheet may also be made of magnesium aluminum alloy, aluminum magnesium alloy, or aluminum. At this time, the density of the second piezoelectric sheet is small, that is, the rigidity of the second piezoelectric sheet is small. When the second piezoelectric sheet is fixed on the second surface of the diaphragm, the overall rigidity of the diaphragm, the first piezoelectric sheet and the second piezoelectric sheet is low. When the diaphragm vibrates according to the audio signal, the amplitude of the diaphragm is large, the sound pressure level of the sound emitted by the loudspeaker inner core is high, and the sound heard by the user is clearer.

In one embodiment, the first piezoelectric plate is made of one of magnesium aluminum alloy, aluminum magnesium alloy, or aluminum. At this time, the density of the first piezoelectric sheet is small, that is, the rigidity of the first piezoelectric sheet is small. When the first piezoelectric sheet is fixed on the first surface of the diaphragm, the overall rigidity of the diaphragm and the first piezoelectric sheet is low. When the diaphragm vibrates according to the audio signal, the amplitude of the diaphragm is large, the sound pressure level of the sound emitted by the loudspeaker inner core is high, and the sound heard by the user is clearer.

In a third aspect, the present application provides a speaker core. The loudspeaker core comprises a first frame, a vibrating diaphragm, a second frame, a first piezoelectric patch, a first supporting block and a second supporting block. The first frame is of a hollow structure. The diaphragm is stacked on one side of the first frame. The diaphragm comprises a first surface and a second surface which are arranged in a back-to-back mode, and the periphery of the first surface is connected to the first frame. The second frame is of a hollow structure. The second frame is located on one side of the vibrating diaphragm, which is far away from the first frame, and the second frame is connected to the periphery of the second surface. The first piezoelectric patch is fixed to the first surface. One surface of the first supporting block is connected to the inner side surface of the first frame, and the other surface of the first supporting block is connected to the first surface. The first support block and the first piezoelectric sheet are arranged in a staggered mode. One surface of the second supporting block is connected to the inner wall surface of the second frame, and the other surface of the second supporting block is connected to the second surface. The second supporting block is opposite to the first supporting block. The second supporting block and the first piezoelectric sheet are arranged in a staggered mode.

In this embodiment, the first support block and the second support block are connected to the diaphragm together, and the first support block and the second support block are both arranged in a staggered manner with respect to the first piezoelectric plate, so that the area of the exposed area of the diaphragm with respect to the first piezoelectric plate is further reduced. At this time, when the diaphragm receives the audio signal, the rigidity of most positions of the diaphragm is relatively consistent, that is, the vibration directions of most positions of the diaphragm are consistent. The sound quality of the sound emitted by the inner core of the loudspeaker is better, and the hearing sense of a user is also better.

In one embodiment, the first frame includes a first inner side and a second inner side opposite to each other, and a third inner side and a fourth inner side opposite to each other. The third and fourth inner side surfaces are connected between the first and second inner side surfaces. And one first supporting block is connected between the first inner side face and the third inner side face. And the first supporting block is connected between the first inner side surface and the fourth inner side surface. And the first supporting block is connected between the second inner side surface and the third inner side surface. And one first supporting block is connected between the second inner side face and the fourth inner side face. In other words, the four first supporting blocks are respectively located at four corners of the first frame.

It can be understood that, by connecting the four first supporting blocks to the four corners of the first frame, respectively, the parts of the diaphragm at the four corners of the first frame are prevented from having inconsistent vibration directions due to the longer distance from the middle part. At this time, the vibration directions of most positions of the diaphragms are consistent. The sound quality of the sound emitted by the inner core of the loudspeaker is better, and the hearing sense of a user is also better.

In one embodiment, the first frame includes a third inner side and a fourth inner side disposed opposite to each other. The third inner side surface is provided with at least one first supporting block. The fourth inner side surface is provided with at least one first supporting block.

In this embodiment, the first supporting block fixes the portions of the diaphragm close to the third inner side surface and the fourth inner side surface, so as to prevent the portions of the diaphragm close to the third inner side surface and the fourth inner side surface from having inconsistent vibration directions due to the fact that the portions of the diaphragm are far away from the diaphragm. At this time, the vibration directions of most positions of the diaphragms are consistent. The sound quality of the sound emitted by the loudspeaker inner core is better, and the hearing sense of a user is also better.

In one embodiment, the loudspeaker core further comprises a second piezoelectric patch secured to the second surface, the second piezoelectric patch being aligned with the first piezoelectric patch.

In one embodiment, the first piezoelectric plate is made of one of magnesium aluminum alloy, aluminum magnesium alloy, or aluminum. At this time, the density of the first piezoelectric sheet is small, that is, the rigidity of the first piezoelectric sheet is small. When the first piezoelectric sheet is fixed on the first surface of the diaphragm, the overall rigidity of the diaphragm and the first piezoelectric sheet is low. When the diaphragm vibrates according to the audio signal, the amplitude of the diaphragm is larger, the sound pressure level of the sound emitted by the loudspeaker kernel is higher, and the sound heard by the user is clearer.

In a fourth aspect, the present application provides a speaker module. The loudspeaker module comprises the loudspeaker inner core.

In this embodiment, when the speaker core is applied to the speaker module, the speaker module has a flat sound level at medium and high frequencies, i.e., the sound generation effect of the speaker module is better. At this time, the sound heard by the user is more comfortable and clear.

In one embodiment, a speaker module includes a front housing. The front shell is connected to one side, away from the vibrating diaphragm, of the first frame.

In a fifth aspect, the present application provides an electronic device. The electronic equipment comprises a shell, a screen and the loudspeaker module. The screen is mounted to the housing. The screen and the shell enclose an accommodating space. The loudspeaker module is fixed in the accommodating space. The shell is provided with a first sound outlet hole. And the sound emitted by the loudspeaker module is transmitted to the outside of the electronic equipment through the first sound outlet.

In one embodiment, the front shell of the speaker module is fixed on the surface of the screen facing the accommodating space.

In one embodiment, the housing includes a bezel and a rear cover. The frame is connected to one side of the screen. The rear cover is fixed on one side of the frame, which deviates from the screen. The first sound outlet is positioned on the frame. The front shell of the loudspeaker module is fixed on the rear cover.

In one embodiment, the screen is provided with a second sound outlet. And the sound emitted by the loudspeaker module is transmitted and broadcast outside the electronic equipment through the second sound outlet.

It can be understood that the first sound outlet hole is formed in the frame, and the second sound outlet hole is formed in the screen, so that sound emitted by the loudspeaker module can be transmitted out of the electronic equipment through the first sound outlet hole and the second sound outlet hole, namely, the sound can be transmitted out of the electronic equipment from different directions. At this time, the user can hear the sound from different directions.

In addition, the sound emitted by the speaker module can not only be transmitted out of the speaker module through the first sound outlet, but also be transmitted out of the speaker module through the second sound outlet. At this time, the sound emitted by the speaker module is relatively large, that is, the user can hear the sound clearly.

In one embodiment, when the electronic device is provided with a receiver, sound emitted by the receiver can also be transmitted out of the electronic device through the second sound outlet, that is, the second sound outlet has a "dual-purpose" function.

Drawings

Fig. 1 is a schematic structural diagram of an implementation manner of an electronic device provided in an embodiment of the present application;

FIG. 2 is a partially exploded schematic view of the electronic device shown in FIG. 1;

FIG. 3 isbase:Sub>A schematic cross-sectional view of the electronic device of FIG. 1 at line A-A;

FIG. 4 is a schematic cross-sectional view of the electronic device of FIG. 1 at line B-B;

FIG. 5 is an enlarged schematic view of the electronic device shown in FIG. 4 at M;

FIG. 6 is a schematic structural diagram of one embodiment of a speaker module of the electronic device shown in FIG. 1;

FIG. 7 is an exploded view of the speaker core of the speaker module of FIG. 6;

figure 8a is a schematic cross-sectional view of the loudspeaker core shown in figure 6 at line C-C;

FIG. 8b is a graph of frequency versus sound pressure level for the speaker module of FIG. 6;

FIG. 9 is a schematic view of the speaker module of FIG. 6 with the speaker core at another angle;

FIG. 10 is a schematic structural diagram of another embodiment of a speaker module of the electronic device shown in FIG. 1;

fig. 11 is a schematic cross-sectional view of the speaker core of the speaker module of fig. 10 at line D-D;

fig. 12a is a schematic view of the speaker core of the speaker module of fig. 10 at another angle;

fig. 12b is a schematic structural diagram of another embodiment of a diaphragm, a first piezoelectric plate, and a second piezoelectric plate of the speaker module shown in fig. 6;

FIG. 12c is a schematic structural diagram of a speaker module of the electronic device shown in FIG. 1 according to still another embodiment;

FIG. 12d is an exploded view of one embodiment of the speaker module shown in FIG. 12 c;

FIG. 13 is a schematic structural diagram of a speaker module of the electronic device shown in FIG. 1 according to still another embodiment;

fig. 14 is an exploded view of the speaker module shown in fig. 13;

FIG. 15a is a schematic illustration of the diaphragm and first piezoelectric patch configuration of the speaker core of FIG. 14;

FIG. 15b is a graph of frequency versus sound pressure level for the speaker module of FIG. 13;

FIG. 16 is a cross-sectional schematic view of another embodiment of the speaker core of the speaker module shown in FIG. 13;

FIG. 17 is a schematic structural diagram of a speaker module of the electronic device shown in FIG. 1 according to still another embodiment;

FIG. 18a is an exploded view of one embodiment of the speaker module shown in FIG. 17;

FIG. 18b is a graph of frequency versus sound pressure level for the speaker module of FIG. 17;

FIG. 19 is an exploded view of another embodiment of the speaker module of FIG. 17;

FIG. 20 is a cross-sectional schematic view of another embodiment of the speaker core of the speaker module shown in FIG. 17;

fig. 21 is a schematic structural diagram of another implementation manner of an electronic device provided in an embodiment of the present application;

FIG. 22 is a partially exploded schematic view of the electronic device shown in FIG. 21;

FIG. 23 is a cross-sectional view of the electronic device shown in FIG. 21 at line E-E;

FIG. 24 is a schematic cross-sectional view of the electronic device shown in FIG. 21 at line G-G;

fig. 25 is an enlarged schematic view of the electronic device shown in fig. 24 at N.

Detailed Description

Referring to fig. 1, fig. 1 is a schematic structural diagram of an implementation manner of an electronic device according to an embodiment of the present disclosure. The electronic device 100 may be a tablet, a cell phone, a camera, a personal computer, a laptop, a vehicle-mounted device, a wearable device, augmented Reality (AR) glasses, an AR helmet, virtual Reality (VR) glasses, or a VR helmet. The electronic device 100 of the embodiment shown in fig. 1 is illustrated as a mobile phone. For convenience of description, as shown in fig. 1, the width direction of the electronic device 100 is defined as an X axis. The length direction of the electronic device 100 is the Y-axis. The thickness direction of the electronic device 100 is the Z-axis.

Referring to fig. 2, fig. 2 is a partially exploded view of the electronic device shown in fig. 1. The electronic device 100 includes a housing 10, a screen 20, a circuit board 30, and a speaker module 40.

The housing 10 includes a rear cover 11 and a frame 12. The rear cover 11 is disposed opposite to the screen 20. The rear cover 11 may be fixed to the side of the bezel 12 remote from the screen 20 by an adhesive. Of course, in other embodiments, the rear cover 11 and the bezel 12 may be integrally formed.

In addition, the screen 20 is used to display images. The screen 20 may be a Liquid Crystal Display (LCD) or an organic light-Emitting Diode (OLED) display.

Further, the screen 20 is mounted on the housing 10. At this time, the rear cover 11, the frame 12 and the screen 30 together enclose an accommodating space 13. The circuit board 30 and the speaker module 40 are mounted in the receiving space 13. The housing space 13 can be used for installing a battery 50, a receiver (not shown), a camera module (not shown), or other devices.

Referring to fig. 1, fig. 1 shows that the circuit board 30 and the speaker module 40 are both located on the top of the electronic device 100. At this time, when the user normally uses the electronic apparatus 100, the speaker module 40 is closer to the ear of the user. The sound heard by the user is clearer. It is understood that the top of the electronic device 100 refers to the portion of the electronic device 100 that faces upward when the user is using the electronic device 100 normally. Of course, the positions of the circuit board 30 and the speaker module 40 are not limited to the positions shown in fig. 1. For example, the circuit board 30 and the speaker module 40 may be both located at the bottom of the electronic device 100. In addition, the circuit board 30 may be provided separately from the speaker module 40. For example, the circuit board 30 is located on top of the electronic device 100. The speaker module 40 is located at the bottom of the electronic device 100. At this time, the circuit board 30 and the speaker 40 may be electrically connected through the flexible circuit board.

In the present application, the fixing position of the speaker module 40 has various arrangements. Two arrangements of the speaker module 40 will be described in detail below with reference to the accompanying drawings. The first embodiment: the speaker module 40 is fixed to a surface of the screen 20 facing the accommodating space 13. The second embodiment: the speaker module 40 is fixed to a surface of the rear cover 11 facing the accommodating space 13.

The first embodiment: referring to fig. 2 again, the screen 20 includes a first inner surface 25 facing the accommodating space 13. The speaker module 40 is fixed to the first inner surface 25.

Referring to fig. 1, fig. 1 shows the circuit board 30 on a side of the speaker module 40 facing away from the screen 20. At this time, the speaker module 40 is located between the circuit board 30 and the screen 20.

Referring to fig. 2 again, the circuit board 30 is provided with an audio signal transmitting chip 31 and a power amplifier 32 (PA).

The audio signal transmitting chip 31 is used to transmit an audio signal. The audio signal transmitting chip 31 is a separate chip. It can be understood that the transmission efficiency of the audio signal is improved by providing a separate chip to independently operate the function of transmitting the audio signal. Of course, in other embodiments, the function of transmitting the audio signal may be integrated on a Central Processing Unit (CPU). At this time, since the CPU has a function of transmitting an audio signal, the occupied space of one chip can be saved inside the electronic apparatus 100, thereby improving the utilization of the internal space of the electronic apparatus 100. Furthermore, the function of transmitting audio signals may also be integrated on other chips, such as a battery management chip.

In addition, one end of the power amplifier 32 is electrically connected to the audio signal emitting chip 31, and the other end is electrically connected to the speaker module 40. When the audio signal emitting chip 31 emits the audio signal, the audio signal is transmitted to the power amplifier 32, and the power amplifier 32 processes the audio signal and transmits the processed audio signal to the speaker module 40. The speaker module 40 emits sound to the outside of the electronic apparatus 100 according to the audio signal.

In one embodiment, the circuit board 30 includes a first board surface 33 and a second board surface 34 disposed opposite to each other. The first plate surface 33 faces the screen 20. The second panel 34 faces the rear cover 11. The speaker module 40 is disposed near the first panel 33. The audio signal transmitting chip 31 and the power amplifier 32 are both fixed on the second board surface 34. It will be appreciated that the area of the speaker module 40 in the X-Y plane is relatively large. At this time, the speaker module 40, the audio signal emitting chip 31 and the power amplifier 32 are respectively disposed on opposite sides of the circuit board 30, so that the speaker module 40, the audio signal emitting chip 31 and the power amplifier 32 can be prevented from interfering with each other due to being located on the same side, and the audio signal emitting chip 31 and the power amplifier 32 can be prevented from being interfered by signals of the screen 20 due to being close to the screen 20.

In addition, the circuit board 30 is provided with a communication hole 35. The power amplifiers 32 located on different sides are electrically connected to the speaker module 40 by passing a wire or a flexible circuit board through the communication hole 35.

In other embodiments, the speaker module 40, the audio signal transmitting chip 31 and the power amplifier 32 may be disposed on the same side at the same time. At this time, the circuit board 30 does not have the through hole 35.

Referring to fig. 2 again, the speaker module 40 has a first sound outlet 41 and a second sound outlet 42. The first sound outlet 41 and the second sound outlet 42 are located at different positions. The sound emitted from the speaker module 40 can be transmitted out of the speaker module 40 through the first sound outlet 41, and can also be transmitted out of the speaker module 40 through the second sound outlet 42. At this time, the sound emitted from the speaker module 40 is relatively loud, i.e. the user can hear the sound clearly.

In other embodiments, the speaker module 40 may also have one sound outlet, or may have more than two sound outlets. The specific application is not limiting. Further, the first sound outlet 41 and the second sound outlet 42 are oriented differently. At this time, the sound emitted from the speaker module 40 can be emitted to the outside of the speaker module 40 in different directions.

Referring to fig. 2 again, the frame 12 is provided with a plurality of first sound outlet holes 121. The first sound outlet hole 121 communicates the housing space 13 to the outside of the electronic apparatus 100. The plurality of first sound outlet holes 121 are all communicated with the first sound outlet 41. At this time, the sound emitted from the speaker module 40 is emitted to the outside of the electronic device 100 through the first sound outlet 41 and the first sound outlet 121. The shape of the first sound outlet hole 121 is not limited to the cylindrical hole illustrated in fig. 2. The first sound outlet hole 121 may also be shaped as a profiled hole.

Referring to fig. 3, fig. 3 isbase:Sub>A schematic cross-sectional view of the electronic device shown in fig. 1 atbase:Sub>A linebase:Sub>A-base:Sub>A. The speaker module 40 is fixed to a surface of the screen 20 facing the accommodating space 13. In one embodiment, the speaker module 40 is fixed to the screen 20 by an adhesive foam.

In addition, the first sound outlet 41 of the speaker module 40 is disposed opposite to the first sound outlet hole 121. At this time, the sound emitted from the speaker module 40 is emitted to the outside of the electronic device 100 through the first sound outlet 41 and the first sound outlet 121.

In one embodiment, when the electronic device 100 is provided with a receiver, sound emitted by the receiver can also be transmitted out of the electronic device 100 through the first sound outlet 121, that is, the first sound outlet 121 has a "dual-purpose" function.

Referring to fig. 2 again in conjunction with fig. 4, fig. 4 is a schematic cross-sectional view of the electronic device shown in fig. 1 at line B-B. The screen 20 is provided with a second sound outlet hole 21. The second sound outlet hole 21 penetrates the side of the screen 20. The second sound outlet hole 21 communicates the housing space 13 to the outside of the electronic apparatus 100. The shape of the second sound outlet hole 21 is not limited to the bar-shaped hole illustrated in fig. 2. The shape of the second sound outlet hole 21 may also be a shaped hole.

In addition, referring to fig. 4 and 5, fig. 5 is an enlarged schematic view of the electronic device shown in fig. 4 at M. The frame 12 is provided with a third sound outlet 122. The third sound outlet hole 122 connects the second sound outlet hole 21 to the second sound outlet 42, that is, an opening of the third sound outlet hole 122 is opposite to the second sound outlet 42, and the other opening is opposite to the second sound outlet 42. At this time, the sound emitted from the speaker module 40 is emitted to the outside of the electronic device 100 through the second sound outlet 42, the third sound outlet 122 and the second sound outlet 21.

In one embodiment, when the electronic device 100 is provided with a receiver, the sound emitted by the receiver can also be transmitted out of the electronic device 100 through the second sound outlet 21, that is, the second sound outlet 21 has a "dual-purpose" function.

Referring to fig. 6, fig. 6 is a schematic structural diagram of an embodiment of a speaker module of the electronic device shown in fig. 1. The speaker module 40 includes a speaker core 43 and a front case 44. The front shell 44 is mounted to the speaker core 43. The speaker core 43 is not limited to the structure illustrated in fig. 6. The speaker core 43 may have the structure shown in fig. 13 and 17.

In the present embodiment, the speaker core 43 has a plurality of arrangements. The three speaker cores 43 will be described in detail below in conjunction with the associated drawings.

The first embodiment: referring to fig. 6 again in conjunction with fig. 7, fig. 7 is an exploded view of the speaker core of the speaker module shown in fig. 6.

The speaker core 43 includes a first frame 431, a second frame 432, a diaphragm 433, a first sound guiding element 434, a second sound guiding element 435, a first piezoelectric sheet 436, and a second piezoelectric sheet 437.

The first frame 431 is a hollow structure, that is, a hollow area is defined by the first frame 431. The first bezel 431 is located at one side of the front case 44 and is coupled to the front case 44. In addition, the front case 44 covers the hollowed-out area.

The diaphragm 433 is located on a side of the first bezel 431 facing away from the front case 44. The diaphragm 433 includes a first surface 4331 and a second surface 4332 opposite to each other, and a first end surface 4333 and a second end surface 4334 opposite to each other. In one embodiment, fig. 7 illustrates that the first end surface 4333 and the second end surface 4334 are two end surfaces of the diaphragm 433 in the X direction. The first end face 4333 and the second end face 4334 are connected between the first surface 4331 and the second surface 4332. The first frame 431 is connected to a periphery of the first surface 4331. At this time, the front shell 44, the first frame 431 and the diaphragm 433 enclose a front cavity 438.

The first frame 431 is provided with a first through hole 4311 and a second through hole 4312 which are provided at an interval. The first through hole 4311 and the second through hole 4312 communicate the front cavity 438 to the outside of the speaker module 40.

The first sound guide 434 and the second sound guide 435 are fixed to the outer side surface of the first frame 431. In one embodiment, the first sound guiding element 434 and the second sound guiding element 435 may be fixed to the outer side of the first frame 431 by an adhesive.

Referring to fig. 3 and 7, the first sound guiding component 434 has a first sound guiding channel 4341. The first sound guiding passage 4341 communicates with the first through hole 4311. An opening of the first sound guiding channel 4341 forms a first sound outlet 41, and the other opening is disposed opposite to the first through hole 4311. FIG. 3 illustrates a first route for sound to travel out of the electronic device 100 from the front volume 438: the front cavity 438, the first through hole 4311, the first sound guiding channel 4341, the first sound outlet hole 121, and the exterior of the electronic device 100.

Referring to fig. 5 and 7, the second sound guiding component 435 has a second sound guiding channel 4351. An opening of the second sound guiding channel 4351 forms the second sound outlet 42, and the other opening is disposed opposite to the second through hole 4312. FIG. 4 illustrates a second route for sound to travel out of the electronic device 100 from the front volume 438: the front chamber 438, the second through hole 4312, the second sound guiding channel 4351, the third sound outlet hole 122, the second sound outlet hole 21, and the exterior of the electronic device 100.

Referring to fig. 6 and 7 again, the second frame 432 is also a hollow structure, that is, a hollow area may be enclosed by the second frame 432. The second frame 432 is located on a side of the diaphragm 433 away from the first frame 431. The second rim 432 is connected to the periphery of the second surface 4332. At this time, the diaphragm 433 separates the hollow area of the first frame 431 from the hollow area of the second frame 432.

In addition, first piezoelectric patch 436 is secured to first surface 4331. The second piezo sheet 437 is secured to the second surface 4332. The projection of the first piezo sheet 436 on the first surface 4331 partially overlaps the projection of the second piezo sheet 437 on the first surface 4331. In other words, in the Z direction, the first piezoelectric sheet 436 and the second piezoelectric sheet 437 have partially overlapped regions, and partially non-overlapped regions, that is, staggered regions.

In addition, the speaker core 43 further includes a first conductive line 4381 and a second conductive line 4382. One end of each of the first lead 4381 and the second lead 4382 is electrically connected to the first piezoelectric patch 436, and the other end is electrically connected to the power amplifier 32 (see fig. 2). At this time, the audio signal processed by the power amplifier 32 can be transmitted to the first piezoelectric patch 436 through the first conducting wire 4381 and the second conducting wire 4382. In other embodiments, the first piezoelectric patch 436 may also be electrically connected to the power amplifier 32 via the flexible circuit board 30.

In addition, the speaker core 43 further includes a third conductive line 4383 and a fourth conductive line 4384. One end of each of the third lead 4383 and the fourth lead 4384 is electrically connected to the second piezoelectric sheet 437, and the other end is electrically connected to the power amplifier 32. At this time, the audio signal processed by the power amplifier 32 is transmitted to the second piezoelectric sheet 437 through the third conducting wire 4383 and the fourth conducting wire 4384. In other embodiments, the second piezoelectric sheet 437 may also be electrically connected to the power amplifier 32 through the flexible circuit board 30.

At this time, when the audio signal transmitting chip 31 (please refer to fig. 2) transmits the audio signal, the audio signal is transmitted to the first piezoelectric patch 436 and the second piezoelectric patch 437 through the power amplifier 32. The first piezoelectric sheet 436 and the second piezoelectric sheet 437 drive the diaphragm 433 to vibrate according to the audio signal, so as to generate sound. At this time, the sound is transmitted to the outside of the electronic apparatus 100 through the above two paths.

In other embodiments, the third conductive wire 4383 may be electrically connected to the first conductive wire 4381 directly. The fourth conductive wire 4384 may also be directly electrically connected to the second conductive wire 4382. At this time, the audio signal transmitted by the audio signal transmitting chip 31 is transmitted to the second piezoelectric sheet 437 through the first conducting wire 4381, the second conducting wire 4382, the third conducting wire 4383 and the fourth conducting wire 4384.

Referring again to fig. 7 in conjunction with fig. 8a, fig. 8a is a cross-sectional view of the speaker core shown in fig. 6 taken along line C-C. The first piezoelectric sheet 436 includes a first outer side 4361 and a second outer side 4362 opposite to each other. The first outer side 4361 faces the first end 4333. The second outer side 4362 faces the second end face 4334. The second piezoelectric sheet 437 includes a fifth outer side 4371 and a sixth outer side 4372 opposite to each other. The fifth outer side 4371 faces the first end 4333. The sixth outer side 4372 faces the second end 4334.

Furthermore, first piezoelectric patch 436 is disposed proximate first end 4333 opposite second piezoelectric patch 437. It can be understood that the distance between the first outer side surface 4361 and the first end surface 4333 is a first distance d1. The distance between the fifth outer side 4371 and the first end 4333 is a second distance d2. The first distance d1 is smaller than the second distance d2.

In addition, the second piezoelectric sheet 437 is disposed close to the second end surface 4334 with respect to the first piezoelectric sheet 436. It can be appreciated that the distance between the second outer side surface 4362 and the second end surface 4334 is a third distance d3. The distance between the sixth outer side surface 4372 and the second end surface 4334 is a fourth distance d4. The third distance d3 is greater than the fourth distance d4. When the first distance d1 is smaller than the second distance d2 and the third distance d3 is greater than the fourth distance d4, the first piezoelectric sheet 436 is staggered with respect to the second piezoelectric sheet 437 in the X direction.

It can be understood that, because the first piezoelectric sheet 436 is disposed close to the first end surface 4333 relative to the second piezoelectric sheet 437, and the first end surface 4333 is located between the inner side surface and the outer side surface of the first frame 431, the first piezoelectric sheet 436 can be close to the first frame 431 to a greater extent in the negative X-axis direction. At this time, in the negative direction of the X axis, the exposed area of the diaphragm 433 with respect to the first piezoelectric sheet 436 is small, that is, the first piezoelectric sheet 436 may cover the diaphragm 433 to a large extent.

In addition, since the second piezoelectric sheet 437 is disposed close to the second end surface 4334 with respect to the first piezoelectric sheet 436, and the second end surface 4334 is located between the inner side surface and the outer side surface of the second rim 432, the second piezoelectric sheet 437 can be disposed close to the second rim 432 to a greater extent in the positive direction of the X axis. At this time, in the positive direction of the X axis, the exposed area of the diaphragm 433 with respect to the second piezoelectric sheet 437 is small, and the second piezoelectric sheet 437 may cover the diaphragm 433 to a large extent.

Referring to fig. 8b, fig. 8b is a frequency versus Sound Pressure Level (SPL) curve of the speaker module shown in fig. 6. Fig. 8b illustrates two curves: the solid line is a curve of the frequency of the speaker module 40 and the SPL in which the first piezoelectric sheet 436 is offset from the second piezoelectric sheet 437. The dotted line is a curve of the frequency of the speaker module 40 versus the SPL when the first piezoelectric plate 436 is aligned with respect to the second piezoelectric plate 437. As can be seen from fig. 8b, the sound pressure level of the solid line is generally higher than the sound pressure level of the dotted line in the frequency range of 100Hz to 10000 Hz. In other words, the sound emitted from the speaker module 40 in which the first piezoelectric sheet 436 is offset with respect to the second piezoelectric sheet 437 is larger than the sound emitted from the speaker module 40 in which the first piezoelectric sheet 436 is aligned with respect to the second piezoelectric sheet 437.

In addition, in the range of the frequency 900Hz to 2000Hz, the sound pressure level of the dotted line has a large convex hull (the area indicated by the arrow in fig. 8 b), i.e., the sound pressure level of the speaker module 40 in which the first piezoelectric sheet 436 is aligned with respect to the second piezoelectric sheet 437 is unstable, i.e., the flatness is low. At this time, the variation of the sound heard by the user is large in the range of 900Hz to 2000Hz, and a harsh sound is likely to occur. The speaker module 40 with the first piezoelectric patch 436 offset from the second piezoelectric patch 437 has a stable sound pressure level in the frequency range of 900Hz to 2000 Hz. In other words, the curve of the frequency versus the SPL of the speaker module 40 in which the first piezoelectric sheet 436 is offset from the second piezoelectric sheet 437 is relatively flat. In this case, the speaker module 40 in which the first piezoelectric sheet 436 is offset from the second piezoelectric sheet 437 has a better sound emission effect.

In the present embodiment, the first piezoelectric sheet 436 may cover the diaphragm 433 to a large extent in the negative direction of the X-axis, the second piezoelectric sheet 437 may cover the diaphragm 433 to a large extent in the positive direction of the X-axis, and furthermore, the first piezoelectric sheet 436 and the second piezoelectric sheet 437 have a partially overlapping region and a partially non-overlapping region in the Z-direction. Therefore, in the X direction, most of the diaphragm 433 is covered by the first piezoelectric sheet 436 and the second piezoelectric sheet 437. The stiffness is also more consistent at most locations of the diaphragm 433 in the X-direction. At this time, when the diaphragm 433 receives an audio signal, the vibration directions of most positions of the diaphragm 433 are uniform in the X direction. At this time, in the band to which the human ear is sensitive, i.e. the frequency is in the range of 900Hz to 2000Hz, the sound pressure level of the speaker module 40 is relatively flat, the sound quality of the sound emitted by the speaker module 40 is better, and the user's hearing sense is also better.

In the conventional piezoelectric patch manufacturing process, the larger the area of the piezoelectric patch is, the higher the difficulty of the piezoelectric patch manufacturing process is. In this embodiment, by arranging the first piezoelectric piece 436 and the second piezoelectric piece 437 in a staggered manner in the X direction, the length of the first piezoelectric piece 436 in the X direction and the length of the second piezoelectric piece 437 in the X direction can be made smaller in the case where it is ensured that the first piezoelectric piece 436 and the second piezoelectric piece 437 can cover most of the diaphragm 433. In this way, the difficulty of the manufacturing process of the first piezoelectric sheet 436 and the second piezoelectric sheet 437 can be greatly reduced.

In other embodiments, the speaker module 40 may not have the first sound guiding element 434 and the second sound guiding element 435. At this time, by providing the first through hole at the first frame 431, the first through hole directly communicates with the first sound outlet hole 121. At this time, the sound emitted from the speaker module 40 is transmitted out of the electronic device 100 through the first through hole and the first sound outlet hole. Further, by providing the second through hole in the front case 44, the second through hole communicates directly to the second sound outlet hole 21 through the third through hole. At this time, the sound emitted from the speaker module 40 can be transmitted out of the electronic device 100 through the second through hole, the third sound outlet hole 122 and the second sound outlet hole 21. In addition, the second through hole may directly communicate with the second sound outlet hole 21. At this time, the sound emitted from the speaker module 40 is transmitted out of the electronic device 100 through the second through hole and the second sound outlet hole 21.

Referring to fig. 9 in conjunction with fig. 8a, fig. 9 is a schematic structural diagram of the speaker core of the speaker module shown in fig. 6 at another angle. First rim 431 has a first inner side 4313. The first inner side surface 4313 is located between the first outer side surface 4361 of the first piezoelectric plate 436 and the first end surface 4333 of the diaphragm 433. Distance H1 between first outer side 4361 and first inner side 4313 is in a range of 1 millimeter to 5 millimeters. Fig. 9 illustrates that distance H1 between first outer side 4361 and first inner side 4313 is 1 mm. In other embodiments, H1 may also be 2 millimeters, 3.5 millimeters, or 4.22 millimeters.

At this time, the distance between first outer side surface 4361 and first inner side surface 4313 is small. In other words, in the negative direction of the X axis, the exposed area of the diaphragm 433 relative to the first piezoelectric plate 436 is small, the vibration directions of most positions of the diaphragm 433 are consistent, and the sound quality of the speaker module 40 is good.

Referring to fig. 9 again, a distance H2 between the first outer side 4361 and the fifth outer side 4371 is in a range of 0.2 mm to 5 mm. Fig. 9 illustrates that H2 is 5 mm. In other embodiments, H2 may also be 1 mm, 3.5 mm, or 4.22 mm.

At this time, under the condition that it is ensured that the first piezoelectric sheet 436 and the second piezoelectric sheet 437 can normally drive the diaphragm 433 to vibrate and the diaphragm 433 can normally sound, the length of the first piezoelectric sheet 436 in the X direction can be reduced by 0.2 mm to 5 mm, and the length of the second piezoelectric sheet 437 in the X direction can be reduced by 0.2 mm to 5 mm. In other words, the lengths of the first piezoelectric sheet 436 and the second piezoelectric sheet 437 can be reduced by a larger length in the X direction. Thus, the difficulty of the manufacturing process of the first piezoelectric sheet 436 and the second piezoelectric sheet 437 can be greatly reduced.

Referring to fig. 9 again, and referring to fig. 8a, the second frame 432 has a second inner wall 4322. The second inner wall surface 4322 is located between the sixth outer side surface 4372 of the second piezoelectric sheet 437 and the second end surface 4334 of the diaphragm 433. A distance H3 between the sixth outer side surface 4372 and the second inner wall surface 4322 is in a range of 1 mm to 5 mm. Fig. 9 illustrates that H3 is 1 mm. In other embodiments, H3 may also be 2 mm, 3.5 mm, or 4.22 mm.

At this time, the distance between the sixth outer side surface 4372 and the second inner wall surface 4322 is small. In other words, in the positive direction of the X axis, the diaphragm 433 has less exposed area with respect to the second piezoelectric sheet 436. In the positive direction of the X axis, the vibration directions of most positions of the vibrating diaphragm 433 are relatively consistent, and the sound quality of the speaker module 40 is relatively good.

Referring to fig. 7 again, the diaphragm 433 further includes a third end surface 4335 and a fourth end surface 4336, which are disposed opposite to each other. The third end face 4335 and the fourth end face 4336 are connected between the first end face 4333 and the second end face 4334, and the third end face 4335 and the fourth end face 4336 are connected between the first surface 4331 and the second surface 4332. In one embodiment, the third end surface 4335 and the fourth end surface 4336 are two end surfaces of the diaphragm 433 in the Y direction.

The first piezoelectric sheet 436 further includes a third outer side 4363 and a fourth outer side 4364 opposite to each other. The third outer side 4363 and the fourth outer side 4364 are connected between the first outer side 4361 and the second outer side 4362. The third outer side 4363 faces the third end 4335. The fourth outer side surface 4364 faces the fourth end surface 4336.

In addition, the second piezoelectric sheet 437 further includes a seventh outer side 4373 and an eighth outer side 4374, which are opposite to each other. The seventh outer side 4373 and the eighth outer side 4374 are connected between the fifth outer side 4371 and the sixth outer side 4372. The seventh outer side 4373 faces the third end 4335. The eighth outer side 4374 faces the fourth end 4336.

Referring to fig. 10 and 11, fig. 10 is a schematic structural diagram of another embodiment of a speaker module of the electronic device shown in fig. 1. Fig. 11 is a schematic cross-sectional view of the speaker core of the speaker module shown in fig. 10 taken along line D-D.

The first piezo sheet 436 is disposed adjacent to the third end surface 4335 opposite the second piezo sheet 437. It is understood that the distance between the third outer side surface 4363 and the third end surface 4335 is a fifth distance d5. The distance between the seventh outer side surface 4373 and the third end surface 4335 is a sixth distance d6. The first distance d5 is smaller than the second distance d6.

In addition, the second piezoelectric patch 437 is disposed proximate the fourth end surface 4336 relative to the first piezoelectric patch 436. It is understood that the distance between the fourth outer side surface 4364 and the fourth end surface 4336 is the third distance d7. The distance between the eighth outer side 4374 and the fourth end 4336 is an eighth distance d8. The seventh distance d7 is greater than the eighth distance d8.

When the first distance d5 is smaller than the second distance d6 and the seventh distance d7 is greater than the eighth distance d8, the first piezoelectric sheet 436 and the second piezoelectric sheet 437 are arranged in a staggered manner in the Y direction.

It is understood that, because first piezoelectric sheet 436 is disposed adjacent to third end face 4335 with respect to second piezoelectric sheet 437 and third end face 4335 is located between the inner side face and the outer side face of first rim 431, first piezoelectric sheet 436 may be disposed closer to first rim 431 to a greater extent in the positive direction of the Y-axis. At this time, in the positive direction of the Y axis, the exposed area of the diaphragm 433 with respect to the first piezoelectric sheet 436 is small, that is, the first piezoelectric sheet 436 may cover the diaphragm 433 to a large extent.

In addition, since the second piezoelectric sheet 437 is disposed close to the fourth end surface 4336 with respect to the first piezoelectric sheet 436, and the fourth end surface 4336 is located between the inner side surface and the outer side surface of the second rim 432, the second piezoelectric sheet 437 can be disposed close to the second rim 432 to a greater extent in the negative direction of the Y axis. At this time, in the negative direction of the Y axis, the exposed area of the diaphragm 433 relative to the second piezoelectric sheet 437 is small, that is, the second piezoelectric sheet 437 may cover the diaphragm 433 to a large extent. In addition, in the Z direction, the first piezoelectric sheet 436 and the second piezoelectric sheet 437 have a partially overlapped region and a partially non-overlapped region. Therefore, in the Y direction, the diaphragm 433 has less exposed area relative to the first piezoelectric sheet 436 and the second piezoelectric sheet 437, and at this time, the rigidity of most positions of the diaphragm 433 is more uniform. When the diaphragm 433 receives an audio signal, the vibration direction of most positions of the diaphragm 433 is uniform in the Y direction. At this time, in a band to which the human ear is sensitive, that is, a frequency in a range of 900Hz to 2000Hz, the sound pressure level of the speaker module 40 is further flattened. In this case, the sound quality of the sound emitted from the speaker module 40 is further improved, and the user's sense of hearing is also further improved.

In this embodiment, the first piezoelectric sheet 436 and the second piezoelectric sheet 437 are arranged in a staggered manner in the Y direction, so that the length of the first piezoelectric sheet 436 in the Y direction can be made smaller and the length of the second piezoelectric sheet 437 in the Y direction can be made smaller, while the first piezoelectric sheet 436 and the second piezoelectric sheet 437 can cover most of the diaphragm 433. In this way, the difficulty of the manufacturing process of the first piezoelectric sheet 436 and the second piezoelectric sheet 437 can be greatly reduced.

Referring to fig. 12a in conjunction with fig. 11, fig. 12a is a schematic structural diagram of a speaker core of the speaker module shown in fig. 10 at another angle.

First rim 431 has a third inner side 4314. Third inner face 4314 is connected to first inner face 4313. Third inner side 4314 is located between third end 4335 and third outer side 4363 of first piezoelectric patch 436. The distance between third exterior side 4363 and third interior side 4314 is between 1 millimeter and 5 millimeters.

Referring to fig. 12a again, a distance between the third outer side 4363 of the first piezoelectric sheet 436 and the seventh outer side 4373 of the second piezoelectric sheet 437 is in a range of 0.2 mm to 5 mm.

In one embodiment, the second bezel 432 has a fourth inner wall surface (not shown). The fourth inner wall surface is connected to the second inner wall surface 4322. The fourth inner wall surface is located between the eighth outer side surface 4374 and the fourth end surface 4336. The distance between the eighth outer side surface 4374 and the fourth inner wall surface of the second piezoelectric sheet 437 is in a range of 1 mm to 5 mm.

In one embodiment, the first piezoelectric plate 436 is made of magnesium-aluminum alloy, aluminum-magnesium alloy, or aluminum. It is understood that magnesium-aluminum alloy means that the composition ratio of magnesium is higher than that of aluminum. Aluminum magnesium alloy means that the composition ratio of aluminum is higher than that of magnesium. At this time, the density of the first piezoelectric sheet 436 is small, that is, the rigidity of the first piezoelectric sheet 436 is small. When the first piezoelectric plate 436 is fixed to the first surface 4331 of the diaphragm 433, the overall rigidity of the diaphragm 433 and the first piezoelectric plate 436 is low. When the diaphragm 433 vibrates according to the audio signal, the amplitude of the diaphragm 433 is larger, and the sound pressure level of the sound emitted from the speaker module 40 is higher, i.e., the sound heard by the user is clearer.

In one embodiment, the second piezoelectric sheet 437 may be made of magnesium aluminum alloy, aluminum magnesium alloy, or aluminum. At this time, the density of the second piezoelectric sheet 437 is small, that is, the rigidity of the second piezoelectric sheet 437 is small. When the second piezoelectric sheet 437 is fixed to the second surface 4332 of the diaphragm 433, the overall rigidity of the diaphragm 433, the first piezoelectric sheet 436, and the second piezoelectric sheet 437 is low. When the diaphragm 433 vibrates according to the audio signal, the amplitude of the diaphragm 433 is larger, and the sound pressure level of the sound emitted from the speaker module 40 is higher, i.e., the sound heard by the user is clearer.

Referring to fig. 12b, fig. 12b is a schematic structural diagram of another embodiment of a diaphragm, a first piezoelectric plate, and a second piezoelectric plate of the speaker module shown in fig. 6.

The first piezoelectric plate 436 and the diaphragm 433 have similar patterns. It is understood that similar figures refer to two figures with equal corresponding corners and proportional corresponding sides, that is, the shape of the first piezoelectric plate 436 is the same as that of the diaphragm 433, but the size of the first piezoelectric plate 436 may be the same as that of the diaphragm 433 or may be different from that of the diaphragm 433.

The first piezoelectric sheet 436 has a first length L1 between the first outer side 4361 and the second outer side 4362. The distance between the third outer side 4363 and the fourth outer side 4364 of the first piezoelectric sheet 436 is the second length L2. The ratio of the first length L1 to the second length L2 is in the range of 0.6 to 0.9. It is understood that the ratio of the first length L1 to the second length L2 may be 0.62, 0.7, 0.8, or 0.9.

It is understood that when the ratio of the first length L1 to the second length L2 of the first piezoelectric sheet 436 is in the range of 0.6 to 0.9, the modes (the modes are the natural vibration characteristics of the structural system) of the first piezoelectric sheet 436 are relatively concentrated. At this time, the mode of the first piezoelectric sheet 436 has more peaks and valleys. At this time, when the diaphragm 433 with the first piezoelectric plate 436 fixed thereon vibrates, the vibration directions of most positions of the diaphragm 433 are consistent. In the frequency range of 2000Hz to 10000Hz, the sound pressure level of the speaker module 40 with the ratio of the first length L1 to the second length L2 in the range of 0.6 to 0.9 is flat.

In addition, when the ratio of the first length L1 to the second length L2 of the first piezoelectric sheet 436 is in the range of 0.6 to 0.9, the modes of the first piezoelectric sheet 436 are displaced from each other along the peak-to-valley of the modes in both directions x and y in the range of frequencies 2000Hz to 10000Hz, so that the peaks and valleys of the modes can be cancelled out. At this time, when the diaphragm 433 with the first piezoelectric plate 436 fixed thereon vibrates, the vibration directions of most positions of the diaphragm 433 are consistent. At this time, in the frequency range of 2000Hz to 10000Hz, the sound pressure level of the speaker module 40 with the ratio of the first length L1 to the second length L2 in the range of 0.6 to 0.9 is flat.

In the present embodiment, by providing the first piezoelectric sheet 436 and the diaphragm 433 with similar patterns, and setting the ratio of the first length L1 to the second length L2 of the first piezoelectric sheet 436 to be in the range of 0.6 to 0.9, the diaphragm 433 with the first piezoelectric sheet 436 fixed thereto can largely avoid the problem of inconsistent vibration directions during the vibration process. At this time, the air pressure radiated from the speaker module 40 is not too small or zero to a large extent. In other words, the sound pressure level of the speaker module 40 is relatively flat, the sound effect of the speaker module 40 is better, and the user's hearing sense is better.

In one embodiment, the first piezoelectric patch 436 is similar to the second piezoelectric patch 437. At this time, the first piezoelectric sheet 436 and the second piezoelectric sheet 437 have substantially the same size. Therefore, the material type of the speaker module 40 is not significantly improved, which is beneficial to simplifying the manufacturing process of the speaker module 40.

Referring to fig. 12c and 12d, fig. 12c is a schematic structural diagram of a speaker module of the electronic device shown in fig. 1 according to still another embodiment. Fig. 12d is an exploded view of one embodiment of the speaker module shown in fig. 12 c.

The speaker core 43 further includes a first support block 45 and a second support block 46. In addition, one surface of the first supporting block 45 is connected to the inner side surface of the first frame 431, and the other surface is connected to the first surface 4331. The first support block 45 is offset from the first piezoelectric sheet 436 and the second piezoelectric sheet 437. In other words, the first supporting block 45 is connected to the region of the diaphragm 433 not covered by the first piezoelectric patch 436 and the second piezoelectric patch 437. The position where the first supporting block 45 is connected to the inner side surface of the first rim 131 is not limited to the position illustrated in fig. 12 d.

One surface of the second supporting block 46 is connected to the inner wall surface of the second rim 432, and the other surface is connected to the second surface 4332. The second support block 46 is disposed opposite to the first support block 45. The second supporting block 46 is disposed to be offset from the first piezoelectric plate 436 and the second piezoelectric plate 437. In other words, the second supporting block 46 is connected to the region of the diaphragm 433 not covered by the first piezoelectric patch 436 and the second piezoelectric patch 437. The position where the second supporting block 46 is connected to the inner wall surface of the second frame 432 is not limited to the position illustrated in fig. 12 d.

In this embodiment, the first support block 45 and the second support block 46 are connected to the diaphragm 433 together, the first support block 45 is disposed to be offset from the first piezoelectric piece 436 and the second piezoelectric piece 437, and the second support block 46 is disposed to be offset from the first piezoelectric piece 436 and the second piezoelectric piece 437, whereby the area of the diaphragm 433 with respect to the exposed region of the first piezoelectric piece 436 and the second piezoelectric piece 437 is further reduced. At this time, when the diaphragm 433 receives the audio signal, the stiffness of most positions of the diaphragm 433 is relatively consistent, that is, the vibration direction of most positions of the diaphragm 433 is consistent. The sound quality of the sound emitted from the speaker module 40 is better, and the user's hearing sense is also better.

In one embodiment, the first support block 45 is integrally formed with the first rim 431. In this case, the strength of the entire speaker core 43 is better. In addition, compared to separately preparing the first support block 45 and the first frame 431, the integrally formed first support block 45 and the first frame 431 may simplify a process of the speaker core 43, thereby reducing an input of cost of the speaker core 43.

In one embodiment, the second support block 46 is integrally formed with the second rim 432. In this case, the strength of the entire speaker core 43 is better. In addition, compared to separately preparing the second supporting block 46 and the second frame 432, the integrally formed second supporting block 46 and the second frame 432 can simplify the process of the speaker core 43, thereby reducing the cost of the speaker core 43.

Referring to fig. 12d again, the number of the first supporting blocks 45 is four. A first support block 45 is connected between first inner side 4313 and third inner side 4314 of first rim 431. A first support block 45 is connected between the first inner side 4313 and the fourth inner side 4316. A first support block 45 is connected between second inner side 4315 and third inner side 4314. A first support block 45 is connected between second inner side 4315 and fourth inner side 4316. In other words, the four first support blocks 45 are respectively located at the four corners of the first rim 431.

It can be understood that, since the second supporting block 46 is disposed opposite to the first supporting block 45, when the first supporting block 45 is plural, the number of the second supporting block 46 is also plural, and the plural second supporting blocks 46 correspond to the plural first supporting blocks 45 one by one. At this time, the position where the second supporting block 46 is disposed is not described in detail herein.

In this embodiment, four first supporting blocks 45 are respectively connected to four corners of the first frame 431, so that the parts of the diaphragm 433 at the four corners of the first frame 431 are prevented from having inconsistent vibration directions due to the longer distance from the middle. At this time, the vibration directions of most positions of the diaphragm 433 are uniform. The sound quality of the sound emitted from the speaker core 43 is preferable, and the user's sense of hearing is also preferable.

In one embodiment, at least one first support block 45 is attached to third inner side 4314. At least one first support block 45 is attached to fourth inner side 4316.

In this embodiment, the portions of the diaphragm 433 close to the third inner side 4314 and the fourth inner side 4316 are fixed by the first supporting block 45, so as to prevent the portions of the diaphragm 433 close to the third inner side 4314 and the fourth inner side 4316 from having inconsistent vibration directions due to the longer distance from the diaphragm 433. At this time, the vibration directions of most positions of the diaphragm 433 are uniform. The sound quality of the sound emitted from the speaker core 43 is preferable, and the user's sense of hearing is also preferable.

The first embodiment of the speaker core 43 has been described in detail above. A second embodiment of the speaker core 43 will be described in detail below with reference to the associated drawings. The technical contents of the second embodiment that are the same as those of the first embodiment are not described in detail. In other words, part of the contents of the first embodiment can be directly applied to the second embodiment.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a speaker module of the electronic device shown in fig. 1 according to still another embodiment. Fig. 14 is an exploded view of the speaker module shown in fig. 13.

The speaker core 43 includes a first frame 431, a second frame 432, a diaphragm 433, and a first piezoelectric plate 436.

The first frame 431 has a hollow structure, i.e., a hollow area is defined by the first frame 431. The first bezel 431 is located at one side of the front case 44 and connected to the front case 44. In addition, the front case 44 covers the hollowed-out area.

The diaphragm 433 is located on a side of the first bezel 431 facing away from the front case 44. The diaphragm 433 includes a first surface 4331 and a second surface 4332 opposite to each other. The first frame 431 is connected to a periphery of the first surface 4331.

The second frame 432 is also a hollow structure, i.e. the second frame 432 can also enclose a hollow area. The second frame 432 is located on a side of the diaphragm 433 away from the first frame 431. The second rim 432 is connected to the periphery of the second surface 4332. At this time, the diaphragm 433 separates the hollow area of the first frame 431 from the hollow area of the second frame 432.

First piezoelectric patch 436 is secured to first surface 4331. The first piezoelectric plate 436 and the diaphragm 433 have similar patterns.

In addition, the first piezoelectric sheet 436 includes a first outer side 4361 and a second outer side 4362 opposite to each other, and a third outer side 4363 and a fourth outer side 4364 opposite to each other. The third outer side 4363 and the fourth outer side 4364 are connected between the first outer side 4361 and the second outer side 4362.

Referring to fig. 15a, fig. 15a is a schematic structural view of a diaphragm and a first piezoelectric plate of the speaker core shown in fig. 14. A distance between the first outer side 4361 and the second outer side 4362 is a first length L1. The distance between the third outer side surface 4363 and the fourth outer side surface 4364 of the first piezoelectric sheet 436 is the second length L2. The ratio of the first length L1 to the second length L2 is in the range of 0.6 to 0.9. It is understood that the ratio of the first length L1 to the second length L2 may be 0.62, 0.7, 0.8, or 0.9.

Referring to fig. 15b, fig. 15b is a graph of frequency versus sound pressure level of the speaker module shown in fig. 13. FIG. 15b illustrates two curves: the solid line is a curve of the frequency and the SPL of the speaker module 40 with a ratio of the first length L1 to the second length L2 being 0.6. The dashed line is a curve of the frequency of the speaker module 40 and the SPL, where the ratio of the first length L1 to the second length L2 is 1. As shown in fig. 15b, in the frequency range of 2000Hz to 10000Hz, the sound pressure level of the speaker module 40 having the ratio of the first length L1 to the second length L2 of 1 has a large pit (the position indicated by the arrow in fig. 15 b), i.e. the sound pressure level has a poor flatness. At this time, in the range of 2000Hz to 10000Hz, it is difficult for the user to hear the sound at a part of the frequencies. And the loudspeaker module 40 with the ratio of the first length L1 to the second length L2 being 0.6 does not generate the pit phenomenon at the sound pressure level within the range of the frequency 2000Hz to 10000 Hz. In other words, the curve of the frequency and the SPL of the speaker module 40 with the ratio of the first length L1 to the second length L2 being 0.6 is relatively flat, so that the user can hear the sound in most high frequency bands. At this time, the ratio of the first length L1 to the second length L2 is 0.6, and the sound effect of the speaker module 40 is better.

In addition, when the ratio of the first length L1 to the second length L2 of the first piezoelectric sheet 436 is in the range of 0.6 to 0.9, the modes of the first piezoelectric sheet 436 are displaced from each other along the peak-to-valley of the modes in both directions x and y in the range of the frequency 2000Hz to 10000Hz, so that the valleys and peaks of the modes can be cancelled out. At this time, when the diaphragm 433 fixed with the first piezoelectric piece 436 vibrates, the vibration directions of most positions of the diaphragm 433 are relatively consistent. At this time, in the frequency range of 2000Hz to 10000Hz, the sound pressure level of the speaker module 40 with the ratio of the first length L1 to the second length L2 in the range of 0.6 to 0.9 is flat.

In the present embodiment, by providing the first piezoelectric sheet 436 and the diaphragm 433 with similar patterns, and setting the ratio of the first length L1 to the second length L2 of the first piezoelectric sheet 436 to be in the range of 0.6 to 0.9, the diaphragm 433 with the first piezoelectric sheet 436 fixed thereto can largely avoid the problem of inconsistent vibration directions during the vibration process. At this time, the air pressure radiated by the speaker module 40 is not too small or zero to a large extent. In other words, the sound pressure level of the speaker module 40 is relatively flat, the sound effect of the speaker module 40 is better, and the user's hearing sense is better.

In this embodiment, the speaker module 40 may further include a first sound guiding element 434 and a second sound guiding element 435. The first sound guide 434 and the second sound guide 435 have the same structure as the first sound guide 434 and the second sound guide 435 of the first embodiment. And will not be described in detail herein. The electronic apparatus 100 according to the present embodiment may have two sound transmission paths according to the first embodiment. For details, reference may be made to the first embodiment, which is not described herein again. The material of the first piezoelectric sheet 436 according to the present embodiment may be magnesium aluminum alloy, aluminum magnesium alloy, or aluminum. The second piezoelectric sheet 437 may be made of magnesium-aluminum alloy, or aluminum.

In one embodiment, the distance between first outer side 4361 of first piezoelectric patch 436 and first inner side 4313 of first frame 431 is in a range of 1 mm to 5 mm.

In one embodiment, the distance between the third outer side 4363 of the first piezoelectric sheet 436 and the third inner side 4315 of the first frame 431 is in a range of 1 mm to 5 mm.

Referring to fig. 16, fig. 16 is a cross-sectional view of another embodiment of the speaker core of the speaker module shown in fig. 13. The speaker core 43 also includes a second piezo sheet 437. The second piezo sheet 437 is secured to the second surface 4332. The second piezo sheet 437 is positioned in alignment with the first piezo sheet 436. It is understood that the second piezoelectric sheet 437 is aligned with the first piezoelectric sheet 436, which means that each lateral side of the second piezoelectric sheet 437 is in one-to-one correspondence with each lateral side of the first piezoelectric sheet 436, and is in the same plane.

In the present embodiment, the second piezoelectric sheet 437 is fixed on the second surface 4332, so that the second piezoelectric sheet 437 and the first piezoelectric sheet 436 cooperate with each other to increase the vibration amplitude of the diaphragm 433, thereby increasing the sound pressure level of the speaker module 40, that is, the speaker module 40 can emit larger sound.

In other embodiments, the positional relationship between the second piezoelectric sheet 437 and the first piezoelectric sheet 436 may also refer to the positional relationship between the first piezoelectric sheet 436 and the second piezoelectric sheet 437 in the first embodiment. For example, the second piezoelectric sheet 437 may be offset from the first piezoelectric sheet 436 in the X direction.

The second embodiment of the speaker core 43 has been described above in detail. A third embodiment of the speaker core 43 will be described in detail below with reference to the associated drawings. The technical contents of the third embodiment that are the same as those of the first embodiment are not described again. In other words, part of the contents of the first embodiment can be directly applied to the third embodiment.

Referring to fig. 17 and 18a, fig. 17 is a schematic structural diagram of a speaker module of the electronic device shown in fig. 1 according to still another embodiment. Fig. 18a is an exploded view of one embodiment of the speaker module shown in fig. 17.

The speaker core 43 includes a first frame 431, a second frame 432, a diaphragm 433, a first piezoelectric piece 436, a first support block 45, and a second support block 46.

The second frame 432 is also a hollow structure, that is, a hollow area can be enclosed by the second frame 432. The second frame 432 is located on a side of the diaphragm 433 away from the first frame 431. The second rim 432 is connected to the periphery of the second surface 4332. At this time, the diaphragm 433 separates the hollow area of the first frame 431 from the hollow area of the second frame 432.

In addition, first piezoelectric patch 436 is secured to first surface 4331.

In addition, one surface of the first supporting block 45 is connected to the inner side surface of the first frame 131, and the other surface is connected to the first surface 4331. The first support block 45 is disposed to be offset from the first piezoelectric sheet 436. In other words, the first supporting block 45 is attached to the region of the diaphragm 433 not covered with the first piezoelectric sheet 436. The position where the first supporting block 45 is connected to the inner side surface of the first frame 131 is not limited to the position illustrated in fig. 18 a. For example, the position where the first supporting block 45 is connected to the inner side surface of the first frame 131 may be the position illustrated in fig. 19.

One surface of the second supporting block 46 is connected to the inner wall surface of the second frame 432, and the other surface is connected to the second surface 4332. The second support block 46 is disposed opposite to the first support block 45. The second support block 46 is offset from the first piezoelectric patch 436. In other words, the second supporting block 46 is connected to the region of the diaphragm 433 not covered with the first piezoelectric sheet 436. The position where the second supporting block 46 is connected to the inner wall surface of the second frame 432 is not limited to the position illustrated in fig. 18 a. For example, the position where the second supporting block 46 is connected to the inner wall surface of the second frame 432 may be the position illustrated in fig. 19.

In this embodiment, the first support block 45 and the second support block 46 are commonly connected to the diaphragm 433, and the first support block 45 and the second support block 46 are both disposed in a staggered manner with respect to the first piezoelectric patch 436, so that the area of the diaphragm 433 exposed to the first piezoelectric patch 436 and the second piezoelectric patch 437 is further reduced. At this time, when the diaphragm 433 receives the audio signal, the stiffness of most positions of the diaphragm 433 is relatively consistent, that is, the vibration direction of most positions of the diaphragm 433 is consistent. The sound quality of the sound emitted by the speaker module 40 is better, and the user's hearing sense is also better.

In one embodiment, the second support block 46 is integrally formed with the second rim 432. In this case, the strength of the entire speaker core 43 is better. In addition, compared with separately preparing the second supporting block 46 and the second frame 432, the integrally formed second supporting block 46 and the second frame 432 can simplify the process of the speaker core 43, thereby reducing the cost of the speaker core 43.

Referring to fig. 18a again, the number of the first supporting blocks 45 is four. A first support block 45 is connected between first inner side 4313 and third inner side 4314 of first rim 431. A first support block 45 is connected between the first inner face 4313 and the fourth inner face 4316. A first support block 45 is connected between the second inner face 4315 and the third inner face 4314. A first support block 45 is connected between second inner side 4315 and fourth inner side 4316. In other words, the four first support blocks 45 are respectively located at the four corners of the first rim 431.

It can be understood that, since the second supporting block 46 is disposed opposite to the first supporting block 45, when the first supporting block 45 is plural, the number of the second supporting block 46 is also plural, and the plural second supporting blocks 46 correspond to the plural first supporting blocks 45 one to one. At this time, the position where the second supporting block 46 is disposed is not described in detail herein.

Referring to fig. 18b, fig. 18b is a graph of frequency versus sound pressure level of the speaker module shown in fig. 17. FIG. 18b illustrates two curves: the solid line is a curve of the frequency of the speaker module 40 provided with the first support block 45 and the second support block 46 and the SPL. The dotted line is a curve of the frequency and SPL of the speaker module 40 without the first and second support blocks 45 and 46. As shown in fig. 18b, in the frequency range of 2000Hz to 3000Hz, the sound pressure level of the speaker module 40 without the first support block 45 and the second support block 46 has a large pit (the position indicated by the arrow in fig. 18 b), i.e. the sound pressure level has a poor flatness. At this time, in the range of 2000Hz to 3000Hz, the user has difficulty hearing the sound at a part of the frequency band in this frequency band. Whereas the sound pressure level at the speaker module 40 provided with the first and second support blocks 45 and 46 is greatly improved in the range of frequencies 2000Hz to 3000 Hz. At this time, the sound effect of the speaker module 40 provided with the first support block 45 and the second support block 46 is better.

In the present embodiment, four first support blocks 45 are respectively connected to four corners of the first frame 431, so as to reduce the area of the diaphragm 433 not covered by the first piezoelectric sheet 436. At this time, the vibration directions of most positions of the diaphragm 433 are uniform. The sound quality of the sound emitted from the speaker core 43 is preferable, and the user's sense of hearing is also preferable.

Referring to fig. 19, fig. 19 is an exploded view of another embodiment of the speaker module shown in fig. 17. At least one first support block 45 is attached to third inner side 4314. At least one first support block 45 is attached to fourth inner side 4316.

In this embodiment, the first supporting block 45 is used to fix the portions of the diaphragm 433 close to the third inner side 4314 and the fourth inner side 4316, so as to avoid the problem that the vibration directions of the areas of the diaphragm 433 close to the third inner side 4314 and the fourth inner side 4316 are not consistent. At this time, the vibration directions of most positions of the diaphragm 433 are uniform. The sound quality of the sound emitted from the speaker core 43 is preferable, and the user's sense of hearing is also preferable.

Referring to fig. 20, fig. 20 is a cross-sectional view of another embodiment of the speaker core of the speaker module shown in fig. 17. The speaker core 43 also includes a second piezoelectric patch 437. The second piezo sheet 437 is secured to the second surface 4332. The second piezo sheet 437 is positioned in alignment with the first piezo sheet 436. It is understood that the second piezoelectric sheet 437 is aligned with the first piezoelectric sheet 436, which means that each lateral side of the second piezoelectric sheet 437 is in one-to-one correspondence with each lateral side of the first piezoelectric sheet 436, and is in the same plane.

In another embodiment, the positional relationship between the second piezoelectric sheet 437 and the first piezoelectric sheet 436 may be referred to as the positional relationship between the first piezoelectric sheet 436 and the second piezoelectric sheet 437 in the first embodiment. For example, the second piezoelectric sheet 437 may be offset from the first piezoelectric sheet 436 in the X direction.

In this embodiment, the speaker module 40 may further include a first sound guiding element 434 and a second sound guiding element 435. The first sound guide 434 and the second sound guide 435 have the same structure as the first sound guide 434 and the second sound guide 435 of the first embodiment. And will not be described in detail herein. The electronic device 100 according to the present embodiment may have two sound transmission paths in the first embodiment. For details, reference may be made to the first embodiment, which is not described herein again. The material of the first piezoelectric sheet 436 according to the present embodiment may be magnesium aluminum alloy, aluminum magnesium alloy, or aluminum. The second piezoelectric sheet 437 may be made of magnesium-aluminum alloy, or aluminum.

Specifically, the speaker module 40 is fixed to the surface of the screen 20 facing the accommodating space 13 in the first embodiment. The second embodiment will be described with reference to the accompanying drawings: the speaker module 40 is fixed to a surface of the rear cover 11 facing the accommodating space 13.

In the second embodiment, the same technical contents as those in the first embodiment are not described again. In other words, part of the contents of the first embodiment can be directly applied to the first embodiment. Referring to fig. 21 and 22, fig. 21 is a schematic structural diagram of another embodiment of an electronic device according to an embodiment of the disclosure. Fig. 22 is a partially exploded schematic view of the electronic device shown in fig. 21.

The rear cover 11 includes a second inner surface 111 facing the receiving space 13. The speaker module 40 is fixed to the second inner surface 111.

Fig. 21 illustrates the circuit board 30 positioned between the screen 20 and the speaker module 40.

Referring to fig. 22 again, the first board 33 of the circuit board 30 is provided with an audio signal transmitting chip 31 and a power amplifier 32. The second board 34 faces the speaker module 40, that is, the audio signal transmitting chip 31 and the power amplifier 32 are located between the circuit board 30 and the screen 20.

Referring to fig. 23, fig. 23 is a schematic cross-sectional view of the electronic device shown in fig. 21 at the line E-E.

The front case 44 of the speaker module 40 is fixed to the rear cover 11. At this time, the front cavity 438 of the speaker module 40 faces the rear cover 11.

At this point, sound is transmitted out of the electronic device 100 from the front cavity 438 on a first route: the front cavity 438, the first through hole 4311, the first sound guiding channel 4341, the first sound outlet hole 121, and the exterior of the electronic device 100.

Referring to fig. 24 and 25, fig. 24 is a schematic cross-sectional view of the electronic device shown in fig. 21 at the G-G line. Fig. 25 is an enlarged schematic view of the electronic device shown in fig. 24 at N.

The sound travels a second route from the front cavity 438 out of the electronic device 100: the front cavity 438, the second through hole 4312, the second sound guiding channel 4351, the third sound outlet 122, the second sound outlet 21, and the exterior of the electronic device 100.

Specifically, the first route and the second route are arranged in the manner described in the first embodiment. And will not be described in detail herein.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A loudspeaker kernel is characterized by comprising a diaphragm, a first piezoelectric plate and a second piezoelectric plate;

the diaphragm comprises a first surface and a second surface which are arranged in an opposite manner, and a first end surface and a second end surface which are arranged in an opposite manner, wherein the first end surface and the second end surface are connected between the first surface and the second surface;

the first piezoelectric patch is fixed on the first surface, the second piezoelectric patch is fixed on the second surface, a projection of the first piezoelectric patch on the first surface is partially overlapped with a projection of the second piezoelectric patch on the first surface, the first piezoelectric patch is arranged close to the first end face relative to the second piezoelectric patch, and the second piezoelectric patch is arranged close to the second end face relative to the first piezoelectric patch;

the loudspeaker core also comprises a first frame, a second frame, a first supporting block and a second supporting block;

the first frame and the second frame are both of hollow structures, the first frame is connected to the periphery of the first surface, and the second frame is connected to the periphery of the second surface;

one surface of the first support block is connected to the inner side surface of the first frame, the other surface of the first support block is connected to the first surface, and the first support block, the first piezoelectric sheet and the second piezoelectric sheet are arranged in a staggered mode;

one surface of the second supporting block is connected to the inner wall surface of the second frame, the other surface of the second supporting block is connected to the second surface, the second supporting block and the first supporting block are arranged oppositely, and the second supporting block, the first piezoelectric patch and the second piezoelectric patch are arranged in a staggered mode.

2. The loudspeaker core as recited in claim 1, wherein the diaphragm further comprises a third end surface and a fourth end surface disposed opposite to each other, the third end surface and the fourth end surface being connected between the first end surface and the second end surface, the third end surface and the fourth end surface being connected between the first surface and the second surface, the first piezoelectric patch being disposed adjacent to the third end surface relative to the second piezoelectric patch, and the second piezoelectric patch being disposed adjacent to the fourth end surface relative to the first piezoelectric patch.

3. The loudspeaker core of claim 1 or 2, wherein the first piezoelectric plate and the diaphragm are similar in pattern, the first piezoelectric plate includes first and second outer sides facing each other, and third and fourth outer sides facing each other, the first outer side faces the first end face, the second outer side faces the second end face, the third and fourth outer sides are connected between the first and second outer sides, a distance between the first and second outer sides is a first length, a distance between the third and fourth outer sides is a second length, and a ratio of the first length to the second length is in a range of 0.6 to 0.9.

4. A loudspeaker core as claimed in claim 1 or 2 wherein the first piezoelectric patch is one of magnesium aluminium, aluminium magnesium or aluminium.

5. The speaker core as recited in claim 1 or 2, further comprising a first rim, the first rim being a hollow structure, the first rim being attached to a periphery of the first surface;

the first piezoelectric sheet has a first outer side surface facing the first end surface, the first frame has a first inner side surface located between the first end surface and the first outer side surface, and a distance between the first inner side surface and the first outer side surface is in a range of 1 mm to 5 mm.

6. A loudspeaker core according to claim 5 wherein the second piezoelectric sheet has a fifth outer side facing the first end face, the distance between the fifth outer side and the first outer side being in the range 0.2 mm to 5 mm.

7. A speaker core, comprising:

the first frame is of a hollow structure;

the vibrating diaphragm is stacked on one side of the first frame and comprises a first surface and a second surface which are arranged in an opposite mode, and the periphery of the first surface is connected to the first frame;

the second frame is of a hollow structure, is positioned on one side of the vibrating diaphragm, which is far away from the first frame, and is connected to the periphery of the second surface;

a first piezoelectric patch secured to the first surface;

one surface of the first support block is connected to the inner side surface of the first frame, the other surface of the first support block is connected to the first surface, and the first support block and the first piezoelectric sheet are arranged in a staggered manner; and (c) a second step of,

the second supporting block, a surface of the second supporting block connect in the internal face of second frame, another surface connect in the second surface, the second supporting block with first supporting block sets up relatively, the second supporting block with first piezoelectric patch staggers the setting.

8. The speaker core of claim 7, wherein the first bezel includes first and second opposing inner sides and third and fourth opposing inner sides, the third and fourth inner sides being connected between the first and second inner sides, the first support block being connected between the first and third inner sides, the first support block being connected between the first and fourth inner sides, the first support block being connected between the second and third inner sides, and the first support block being connected between the second and fourth inner sides.

9. The speaker core as recited in claim 7, wherein the first bezel comprises third and fourth inner sides disposed opposite one another, the third inner side being provided with at least one of the first support blocks, the fourth inner side being provided with at least one of the first support blocks.

10. A loudspeaker core according to any one of claims 7 to 9 wherein the loudspeaker core further comprises a second piezoelectric patch secured to the second surface, the second piezoelectric patch being arranged in alignment with the first piezoelectric patch.

11. A loudspeaker core as claimed in any one of claims 7 to 9 wherein the first piezoelectric patch is one of magnesium aluminium, aluminium magnesium or aluminium.

12. The loudspeaker core as recited in any of claims 7 to 9, wherein the first piezoelectric patch and the diaphragm are of similar pattern, the first piezoelectric patch comprises first and second outer sides facing away from each other, and third and fourth outer sides facing away from each other, the first outer side facing the first end face, the second outer side facing the second end face, the third and fourth outer sides being connected between the first and second outer sides, a distance between the first and second outer sides being a first length, a distance between the third and fourth outer sides being a second length, and a ratio of the first length to the second length being in a range of 0.6 to 0.9.

13. A loudspeaker module comprising a loudspeaker core as claimed in any one of claims 1 to 12.

14. An electronic device, comprising a housing, a screen and the speaker module according to claim 13, wherein the screen is mounted on the housing, the screen and the housing define an accommodating space, the speaker module is fixed in the accommodating space, the housing is provided with a first sound outlet, and sound emitted from the speaker module is transmitted to the outside of the electronic device through the first sound outlet.