CN115412628A

CN115412628A - Electroacoustic module and electronic equipment

Info

Publication number: CN115412628A
Application number: CN202110583044.1A
Authority: CN
Inventors: 孙小光
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2022-11-29

Abstract

The application relates to an electroacoustic module and electronic equipment, and the electroacoustic module includes casing, first electroacoustic unit and second electroacoustic unit. The shell is provided with a sound cavity with variable volume, and the first electro-acoustic unit and the second electro-acoustic unit are respectively positioned in the sound cavity. When the first electro-acoustic unit is in the first state, the first electro-acoustic unit is used for being electrified to sound so as to drive the second electro-acoustic unit to sound passively. And in the second state, the first electro-acoustic unit and the second electro-acoustic unit are respectively electrified to produce sound, and the volume of the sound cavity in the first state is different from that of the sound cavity in the second state. Above electroacoustic module can be applied to electronic equipment, and the volume in the sound chamber of casing is variable, and electroacoustic module can switch operating condition according to the difference of sound chamber volume to change electroacoustic module's audio frequency characteristic, and then promote electronic equipment's audio.

Description

Electroacoustic module and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to an electroacoustic module and electronic equipment.

Background

In the related art, a scroll screen electronic device (e.g., a mobile phone) is generally equipped with two speakers to obtain a stereo effect, and sound effects of an expanded state and a contracted state are consistent. Compare the shrink state, the spool screen electronic equipment's of expansion state display area can promote, and the user has higher demand to the audio-visual experience of expansion state and gaming experience. Therefore, it is important to improve the sound effect of the electronic equipment in the unfolded state.

Disclosure of Invention

The embodiment of the application provides an electroacoustic module and electronic equipment to promote electronic equipment's audio.

An electroacoustic module, comprising:

the sound cavity is arranged on the shell, and the volume of the sound cavity is variable;

the first electroacoustic unit is positioned in the sound cavity; and

the second electro-acoustic unit is positioned in the sound cavity;

when the first electro-acoustic unit is in a first state, the first electro-acoustic unit is used for being electrified to sound so as to drive the second electro-acoustic unit to sound passively; and in a second state, the first electro-acoustic unit and the second electro-acoustic unit are respectively electrified to produce sound, and the volume of the sound cavity in the first state is different from that of the sound cavity in the second state.

An electronic device, comprising:

a housing assembly including a first housing and a second housing, the second housing slidably disposed in the first housing;

the flexible screen module is arranged on the shell component; and

as mentioned above, the housing is disposed in the housing assembly, and in the process of sliding the second housing relative to the first housing, at least a portion of the flexible screen module enters and exits the housing assembly, and changes the volume of the sound cavity.

An electroacoustic module, comprising:

the shell comprises a first cover shell and a second cover shell which are arranged at intervals, and the first cover shell is communicated with the second cover shell;

the first electroacoustic unit is arranged in the first housing; and

the vibrating diaphragm is arranged in the second housing; the volume of the space for sound reflection between the first electro-acoustic unit and the diaphragm is variable during movement of the second enclosure relative to the first enclosure.

An electronic device, comprising:

the flexible screen module is arranged on the shell component; and

the shell is arranged in the shell assembly, at least part of the flexible screen module enters and exits the shell assembly in the process that the second shell slides relative to the first shell, and the first shell moves relative to the second shell to change the volume of the sound cavity.

The electroacoustic module can be applied to electronic equipment, the volume of a sound cavity of the shell is variable, and in a first state, the first electroacoustic unit is used for electrifying to generate sound so as to drive the second electroacoustic unit to generate sound passively; and in the second state, the first electro-acoustic unit and the second electro-acoustic unit are respectively electrified to produce sound, and the volume of the sound cavity in the first state is different from that of the sound cavity in the second state. In other words, the electroacoustic module can switch the working state according to the different volumes of the sound cavity to change the audio characteristics of the electroacoustic module, thereby improving the sound effect of the electronic equipment.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of an electronic device according to an embodiment, wherein the second housing is in a second position;

FIG. 2 is a schematic view of another perspective of the electronic device shown in FIG. 1;

FIG. 3 is an exploded view of the electronic device of FIG. 1;

FIG. 4 is a schematic view of the electronic device of FIG. 1 with the second housing in a first position;

FIG. 5 is a schematic view of another perspective of the electronic device shown in FIG. 4;

FIG. 6 is a front view of the electronic device of FIG. 1;

FIG. 7 isbase:Sub>A cross-sectional view taken along A-A in an embodiment of the electronic device shown in FIG. 6;

FIG. 8 is a front view of the electronic device of FIG. 4;

FIG. 9 is a cross-sectional view taken along B-B in one embodiment of the electronic device shown in FIG. 8;

fig. 10 is a cross-sectional view of an electro-acoustic module according to an embodiment, wherein the telescopic member is in an extended state;

fig. 11 is a cross-sectional view of the electro-acoustic module of fig. 10 with the telescopic member in a collapsed state;

FIG. 12 isbase:Sub>A cross-sectional view taken along A-A of another embodiment of the electronic device shown in FIG. 6;

FIG. 13 is a cross-sectional view taken along B-B of another embodiment of the electronic device shown in FIG. 8;

fig. 14 is a schematic diagram illustrating a positional relationship between the electroacoustic module and the first and second housings according to an embodiment, wherein the telescopic member is in an extended state;

fig. 15 is a schematic diagram illustrating a positional relationship between the electroacoustic module and the first and second housings according to an embodiment, wherein the telescopic member is in a folded state.

Reference numerals:

100. electronic device 10, case assembly 12, first case

14. Second shell 142, back lid 16, accommodating space

20. Flexible screen module 20a, fixed part 20b, free part

30. Guide 40, electroacoustic module 41, and housing

41a, a sound cavity 411, a first cover 411a and a first front cavity

411b, a first rear cavity 411c, a first sound outlet 413, a second cover

413a, a second front cavity 413b, a second rear cavity 413c, a second sound outlet hole

415. The telescopic member 415a, the channel 43, the first electroacoustic unit

45. Second electroacoustic unit 50, camera module 60 and driving mechanism

70. Tensioning element 71, moving part S1, first electroacoustic module

S2, a second electroacoustic module

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

As used herein, "electronic device" means a device capable of receiving and/or transmitting communication signals including, but not limited to, a device connected via any one or more of the following connections:

(1) Via wireline connections, such as via Public Switched Telephone Network (PSTN), digital Subscriber Line (DSL), digital cable, direct cable connections;

(2) Via a Wireless interface means such as a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter.

Electronic devices arranged to communicate over a wireless interface may be referred to as "mobile terminals". Examples of mobile terminals include, but are not limited to, the following electronic devices:

(1) A satellite phone or a cellular phone;

(2) Personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities;

(3) Radiotelephones, pagers, internet/intranet access, web browsers, notebooks, calendars, personal Digital Assistants (PDAs) equipped with Global Positioning System (GPS) receivers;

(4) A conventional laptop and/or palmtop receiver;

(5) Conventional laptop and/or palmtop radiotelephone transceivers, and the like.

Referring to fig. 1, 2 and 3, an electronic device 100 of the present embodiment includes a housing assembly 10, a flexible screen module 20 and a guide 30. The case assembly 10 is a hollow structure, and the flexible screen module 20, the guide 30, and the like may be disposed on the case assembly 10. The electronic device 100 may further include a circuit board (not shown), a battery (not shown) and the electroacoustic module 40, and the circuit board, the battery and the electroacoustic module 40 may be disposed on the housing assembly 10. The circuit board may integrate a processor, a power management module, a memory unit, a baseband chip, and the like of the electronic device 100. The electroacoustic module 40 is used to convert the electrical signal into an audio signal, for example, the electroacoustic module 40 may be used to play audio information. The flexible screen module 20 and the electroacoustic module 40 are both in communication connection with the circuit board, and the battery can supply power to the flexible screen module 20, the electroacoustic module 40 and electronic elements on the circuit board. Of course, the electronic device 100 may further include a camera module 50, the camera module 50 is connected to the circuit board in communication, and the battery can supply power to the camera module 50. It is understood that the electronic device 100 of the embodiment of the present application includes, but is not limited to, a mobile phone, a tablet computer, and other terminal devices or other portable electronic devices 100. In the embodiments of the present application, a mobile phone is taken as an example for description.

Referring to fig. 3, 4 and 5, in the present embodiment, the housing assembly 10 includes a first housing 12 and a second housing 14, and the second housing 14 and the first housing 12 are capable of relative movement. Specifically, in the present embodiment, the second housing 14 and the first housing 12 are slidably connected. In other words, the second housing 14 is slidable relative to the first housing 12. For example, one of the first shell 12 and the second shell 14 may be provided with a slide rail, and the other may slide along the slide rail, so that the end of the second shell 14 far from the first shell 12 and the end of the first shell 12 far from the second shell 14 move toward or away from each other.

The second housing 14 is slidable relative to the first housing 12 to a first position and a second position. With reference to fig. 4, when the second shell 14 is in the first position, the electronic device 100 may obtain a relatively large display area, so as to enhance the use experience of the electronic device 100; when the second housing 14 is in the second position (see fig. 1), the electronic device 100 has a relatively small size and is convenient to carry. It is to be understood that in the embodiments hereinafter described in the present application, the first position, the second position and the like refer to the relative positions of the second housing 14 and the first housing 12. For simplicity, similar expressions that refer to the second housing 14 being in a first position relative to the first housing 12, such similar expressions that refer to the second housing 14 being in a first position relative to the first housing 12, and that refer to the second housing 14 being in a second position, such similar expressions that refer to the second housing 14 being in a second position relative to the first housing 12.

In the present embodiment, with the first position as a reference, the positions of the end of the second housing 14 away from the first housing 12 and the end of the first housing 12 away from the second housing 14 can be determined more clearly. Taking fig. 4 as an example, when the second housing 14 is at the first position, the leftmost side of the electronic device 100 in the width direction is the end of the second housing 14 away from the first housing 12, and the rightmost side of the electronic device 100 in the width direction is the end of the first housing 12 away from the second housing 14.

In the present embodiment, when the second housing 14 is in the first position, the overall width of the electronic device 100 is greater than that in the second position, so that the width dimension of the exposed flexible screen module 20 is variable. In other words, the electronic apparatus 100 may vary in size in the width direction. In such an embodiment, an interface of the electronic device 100, such as a data line jack or a charging line jack or a headphone jack, may be provided at the end in the width direction. In other embodiments, when the second housing 14 is in the first position, the overall length of the electronic device 100 is greater than the length in the second position, so that the length dimension of the exposed flexible screen module 20 is variable. In other words, the electronic apparatus 100 may vary in size in the longitudinal direction. In such an embodiment, an interface of the electronic device 100, such as a data line jack or a charging line jack or a headphone jack, may be provided at an end of the length direction.

Referring to fig. 6 and 7, the second shell 14 and the first shell 12 may form a receiving space 16 together. It is understood that the receiving space 16 may vary with the relative movement of the second housing 14 and the first housing 12. The receiving space 16 is used for placing electronic components such as the guide member 30, the circuit board, and the battery. The flexible screen module 20 may include a fixed portion 20a and a free portion 20b, which are oppositely disposed, and the fixed portion 20a is disposed on the first casing 12 and is fixed relative to the first casing 12. The flexible screen module 20 bypasses the guide member 30 when in the second position, and the free portion 20b of the flexible screen module 20 is accommodated in the housing assembly 10, so that part of the flexible screen module 20 is hidden in the housing assembly 10, and part of the flexible screen module 20 hidden in the housing assembly 10 may not be used for displaying. In other words, movement of the first shell 12 relative to the second shell 14 may cause at least a portion of the free portion 20b to deploy from the second shell 14, or cause the free portion 20b deployed from the second shell 14 to retract within the shell assembly 10.

It is understood that in the embodiments of the present application, the two objects are fixed relative to each other, that is, the two objects cannot move relative to each other under normal conditions, and the two objects fixed relative to each other may be directly connected physically or indirectly connected through an intermediate structure. Taking the fixing portion 20a and the first shell 12 as an example, the position of the fixing portion 20a and the first shell 12 are relatively fixed, the fixing portion 20a may directly contact with the first shell 12, for example, the fixing portion 20a and the first shell 12 are directly fixed by using a threaded fastener or a clamping manner, or the fixing portion 20a and the first shell 12 may be indirectly fixed by using an adhesive layer, an intermediate connecting plate, or other structures.

It is understood that the fixed portion 20a and the free portion 20b can be distinguished in such a way that when the second shell 14 is located at the second position relative to the first shell 12, the portion of the flexible screen module 20 exposed out of the shell assembly 10 is the fixed portion 20a of the flexible screen module 20, and the portion of the flexible screen module 20 accommodated in the shell assembly 10 is regarded as the free portion 20b. In some embodiments, when the second housing 14 is located at the second position, the fixing portion 20a exposed outside the housing assembly 10 is substantially rectangular, and the size thereof may be 5-6 inches, that is, the size of the display screen of a general smart phone, so that the electronic device 100 is convenient to carry and use.

Further, the second housing 14 may include a rear cover 142, and the rear cover 142 covers the free portion 20b of the flexible screen module 20 when in the second position. The rear cover 142 may be provided with a light-transmitting area, and the portion of the flexible screen module 20 accommodated in the housing assembly 10 in the second position may also be used for displaying, so that a user can view information displayed by the flexible screen module 20 from the light-transmitting area, and further expand a use scene of the electronic device 100. For example, in this embodiment, the electronic device 100 can implement functions such as self-shooting, video call, etc. by using the rear camera module 40 without providing a front camera. The light-transmitting area may be made of transparent glass or may be formed by an opening of the rear cover 142. After the second housing 14 is slid to a first position relative to the first housing 12, at least a portion of the flexible screen module 20 housed in the housing assembly 10 is exposed. The exposed flexible screen module 20 can be used for displaying, so that the electronic device 100 has a relatively large display area to improve the use experience of a user.

Referring to fig. 8 and 9, in the present embodiment, the guiding element 30 is disposed at an end of the second shell 14 away from the first shell 12, and the guiding element 30 can guide the flexible screen module 20 to deform and unfold on the second shell 14 during the process of switching the second shell 14 from the second position to the first position relative to the first shell 12. The guide 30 can limit the bending radius of the flexible screen module 20 within a suitable range to avoid damage to the flexible screen module 20 caused by an excessively small bending radius. Of course, the guide 30 can also prevent the electronic device 100 from being too thick due to an excessively large bending radius of the flexible screen module 20.

As shown in fig. 9, in some embodiments, the guide 30 may be a rotating shaft structure with convex teeth, and the flexible screen module 20 is coupled with the guide 30 by meshing or the like. When the second shell 14 slides relative to the first shell 12, the part of the flexible screen module 20 engaged on the guide member 30 is moved by the guide member 30 and is expanded or retracted into the shell assembly 10.

It is understood that in other embodiments, the guide 30 may also be a circular shaft without additional teeth. During the process of switching the second shell 14 from the second position to the first position, the guide member 30 spreads apart the portion of the flexible screen module 20 attached to the guide member 30, so that more flexible screen modules 20 are exposed outside the shell assembly 10 and are in a flat state. In this embodiment, the guide member 30 may be rotatably disposed on the second housing 14, and during the process of gradually unfolding the flexible screen module 20, the guide member 30 may rotate along with the movement of the flexible screen module 20, so as to reduce the resistance suffered by the flexible screen module 20 during the unfolding process and reduce the wear of the contact portion of the guide member 30 and the flexible screen module 20.

In other embodiments, the guide 30 may also be fixed to the second housing 14, the guide 30 having a smooth surface. During the process of unfolding the flexible screen module 20 to the second housing 14, the guide 30 is in slidable contact with the flexible screen module 20 through its smooth surface. In other words, in such an embodiment, the guide member 30 may be integrally formed with the second housing 14 or welded, the guide member 30 may be considered as a part of the second housing 14, and the free portion 20b of the flexible screen module 20 bypasses the end of the second housing 14 away from the first housing 12 and extends into the housing assembly 10.

During the process of switching the second shell 14 from the first position to the second position, the flexible screen module 20 can be retracted by the guide 30, i.e. the portion of the flexible screen module 20 deployed in the second shell 14 is retracted into the shell assembly 10. Further, in some embodiments, the electronic device 100 may include a driving mechanism 60, the driving mechanism 60 may be disposed in the housing assembly 10, and the driving mechanism 60 may be coupled to the first housing 12 or the second housing 14 to drive the second housing 14 to move relative to the first housing 12, so as to drive the flexible screen module 20 to extend or retract. It will be appreciated that the drive mechanism 60 may be omitted and the user may directly, manually or the like, move the second and

first housings

14, 12 relative to one another.

Referring to fig. 8 and 9, the electronic device 100 may further include a tensioning assembly 70, the free portion 20b of the flexible screen module 20 is linked with the tensioning assembly 70, when the second housing 14 is switched from the first position to the second position, the tensioning assembly 70 applies a tensile force to the free portion 20b, and the whole free portion 20b can bear the tensile force by the abutting action of the guiding member 30 on the flexible screen module 20, so that the free portion 20b is flatly retracted into the housing assembly 10, that is, the tensioning assembly 70 drives the flexible screen module 20 to reset. The tensioning assembly 70 may also be used to apply a tensile force to the free portion 20b during the process of extending the flexible screen module 20 out of the housing assembly 10 to enable the flexible screen module 20 to be unfolded flat to the second shell 14. After the flexible screen module 20 is retracted into the housing assembly 10, the electronic device 100 can obtain a relatively small external size, so as to improve the portability of the electronic device 100.

In some embodiments, the tension assembly 70 is disposed within the housing assembly 10 and connected to the free portion 20b of the flexible screen module 20. The tension assembly 70 may include an elastic member (not shown) and a movable member 71, the movable member 71 being rotatably connected to the second housing 14. The elastic member may be a torsion spring, one free end of the torsion spring is connected to the second housing 14, the other free end of the torsion spring is connected to the movable member 71, and the movable member 71 is sleeved with the torsion spring. During the process of switching the second housing 14 between the first position and the second position relative to the first housing 12, the torsion spring generates a torsional deformation and applies a tension to the flexible screen module 20 through the movable member 71.

In the process that the flexible screen module 20 extends out of the housing assembly 10, that is, in the process that the second housing 14 is switched from the second position to the first position, the free portion 20b of the flexible screen module 20 drives the movable member 71 to rotate relative to the second housing 14 so as to release the flexible screen module 20 wound around the movable member 71, the elastic member accumulates elastic potential energy, and the movable member 71 applies a tensile force to the flexible screen module 20 as a resistance force so that the flexible screen module 20 can be flatly unfolded from the second housing 14; in the process of retracting the flexible screen module 20 into the housing assembly 10, that is, in the process of switching the second housing 14 from the first position to the second position, the elastic member releases elastic potential energy and drives the movable member 71 to return, and the movable member 71 applies a tensile force to the flexible screen module 20 as a motive force, so that the flexible screen module 20 can be smoothly retracted into the housing assembly 10, and the free portion 20b is wound around the movable member 71. In other embodiments, the tension assembly 70 may also be connected to the first shell 12.

In other embodiments, the tension assembly 70 may have other structural forms. For example, the movable member 71 and the elastic member may be omitted, and the tensioning member 70 includes an elastic cord connected to the first shell 12 or the second shell 14, and the elastic cord is connected to the free portion 20b, so as to apply a tensioning force to the flexible screen module 20 by using the elastic cord during the movement of the second shell 14 relative to the first shell 12. As another example, in embodiments where the electronic device 100 includes the drive mechanism 60, the drive mechanism 60 may be coupled to the moveable member 71 of the tension assembly 70. During the process of extending the flexible screen module 20 out of the housing assembly 10, the flexible screen module 20 can be gradually released and a tensile force can be applied to the flexible screen module 20 by using the transmission resistance of the driving mechanism 60, so that the flexible screen module 20 is smoothly unfolded from the second housing 14; in the process of retracting the flexible screen module 20 into the housing assembly 10, the driving mechanism 60 drives the free portion 20b of the flexible screen module 20 to gradually wind on the movable member 71, so that the flexible screen module 20 is smoothly retracted into the housing assembly 10. In this embodiment, the drive mechanism 60 may be a motor or a combination of a motor and a gear set.

It is understood that, in the present embodiment, the first position and the second position can be regarded as two extreme positions of the movement of the second housing 14 relative to the first housing 12. In the first position, the display area of the flexible screen module 20 reaches the maximum, and under normal conditions, the second shell 14 can not move away from the first shell 12. In the second position, the display area of the flexible screen module 20 reaches the minimum state, and under the normal condition, the second shell 14 can not move close to the first shell 12. The first and second positions may be achieved by providing a stop structure on the second housing 14 or the first housing 12 or the guide 30. For example, the second shell 14 may be provided with a spring piece, the first shell 12 may be provided with two card slots, and in the first position, the spring piece is engaged with one of the card slots, so as to position the second shell 14 and the first shell 12 in the first position; when the second position is reached, the elastic sheet is engaged with the other slot, so that the second shell 14 and the first shell 12 are positioned at the second position.

It can be understood that a plurality of intermediate positions may be further disposed between the first position and the second position to achieve the positioning of the second housing 14 relative to the first housing 12 at the plurality of intermediate positions, and to enable the flexible screen module 20 to have different display areas at different intermediate positions, thereby expanding the usage scenarios of the electronic device 100. The plurality of intermediate positions may also be implemented by using a limiting structure, for example, the second shell 14 may be positioned at the plurality of intermediate positions relative to the first shell 12 by matching the elastic pieces with the slots.

Referring to fig. 10 and 11, the electro-acoustic module 40 of the electronic device 100 may include a housing 41, a first electro-acoustic unit 43, and a second electro-acoustic unit 45. The housing 41 is provided with a sound chamber 41a for reflecting sound, and the volume of the sound chamber 41a is variable, and the first electro-acoustic unit 43 and the second electro-acoustic unit 45 are respectively provided in the sound chamber 41a. The second electro-acoustic unit 45 may include a diaphragm (not shown) and a coil (not shown) for driving the diaphragm to vibrate and generate sound when energized. The first electroacoustic unit 43 may also include another coil (not shown) and another diaphragm (not shown), and the other coil may drive the other diaphragm to vibrate and generate sound when being energized.

The housing 41 may include a first housing 411, a second housing 413, and a telescopic member 415 coupled between the first housing 411 and the second housing 413. The first electroacoustic unit 43 is disposed in the first housing 411, and the second electroacoustic unit 45 is disposed in the second housing 413. The first housing 411, the first electroacoustic unit 43, the telescopic member 415, the second housing 413 and the second electroacoustic unit 45 together enclose a sound cavity 41a. In other words, the telescopic member 415 has at least a part of the sound cavity 41a, and one end of the telescopic member 415 is connected to the first housing 411, and the other end is connected to the second housing 413, the first housing 411 can be regarded as one end of the casing 41, and the second housing 413 can be regarded as the opposite end of the casing 41. The first housing 411 and the second housing 413 can move relatively far away from each other to stretch the telescopic member 415, so that the telescopic member 415 forms a passage 415a for expanding the sound reflection space, and the first housing 411 is communicated with the second housing 413 through the passage 415a. The first module 41 and the second module 45 can also move relatively close together to compress the telescopic member 415, so that the volume of the passage 415a is reduced. The channel 415a is a part of the sound chamber 41a, and since the volume of the channel 415a is variable, i.e. the space for sound reflection can be varied, the audio frequency characteristics of the electroacoustic module 40 can be varied. Of course, in some embodiments, at least one of the first housing 411 and the second housing 413 may be omitted, the first electro-acoustic unit 43 may be fixedly connected to one end of the telescopic member 415, the second electro-acoustic unit 45 may be fixedly connected to the other end of the telescopic member 415, and the telescopic deformation of the telescopic member 415 may change the volume of the sound cavity 41a for reflecting the sound, thereby changing the audio frequency characteristics of the electro-acoustic module 40.

In some embodiments, the first casing 411 is fixed in position relative to one of the first shell 12, the second shell 14, and the free portion 20b, and the second casing 413 is fixed in position relative to the remaining two of the first shell 12, the second shell 14, and the free portion 20b. For example, in some embodiments, the first housing 411 may be fixedly connected to the fixing portion 20a of the flexible screen module 20 or the first shell 12, so that the position of the first housing 411 is fixed relative to the position of the fixing portion 20a, and the second housing 413 may be connected to the second shell 14 or the free portion 20b of the flexible screen module 20, so as to generate a stretching deformation during the movement of the second shell 14 relative to the first shell 12.

Referring to fig. 9, in other embodiments, the second housing 413 may be connected to the fixed portion 20a of the flexible screen module 20 or the first housing 12, so that the position of the second housing 413 relative to the first housing 12 is fixed, and the first housing 411 may be fixedly connected to the second housing 14 or the free portion 20b of the flexible screen module 20, so as to generate a stretching deformation during the movement of the second housing 14 relative to the first housing 12.

Of course, referring to fig. 12 and 13, in other embodiments, one of the second casing 413 and the first casing 411 may be connected to the second shell 14 to achieve relative fixing with the position of the second shell 14, and the other of the second casing 413 and the first casing 411 may be connected to the free portion 20b of the flexible screen module 20 and fixed relative to the position of the free portion 20b, so that the expansion piece 415 is deformed in an expansion manner during the movement of the second shell 14 relative to the first shell 12, and further changes the volume of the sound cavity 41a for reflecting sound, which is not described herein again.

During the switching of the second housing 14 from the second position to the first position with respect to the first housing 12, i.e. during the gradual extension of the free portion 20b out of the housing assembly 10, the first housing 411 and the second housing 413 move relatively away from each other, and the telescopic member 415 is stretched to form a passage 415a for enlarging the sound reflection space. The first electroacoustic unit 43 may be electrically connected to a circuit board of the electronic device 100, and under the condition that other conditions are not changed, the volume of the cavity for sound reflection may directly determine the low frequency resonance frequency of the electroacoustic module 40, and the larger the volume of the cavity for resonance is, the smaller the low frequency resonance frequency is, that is, the better the low frequency performance is. Therefore, after the telescopic component 415 is stretched and forms the channel 415a, the space for reflecting sound can be increased, the low-frequency response of the electroacoustic module 40 is improved, and the low-frequency sound emitted by the electroacoustic module 40 is increased, so that the electroacoustic module 40 has a better low-frequency effect, that is, the electronic device 100 has better sound quality, that is, the sound effect of the electroacoustic module 40 and the electronic device 100 is improved.

During the switching of the second casing 14 from the first position to the second position with respect to the first casing 12, i.e. during the gradual retraction of the free portion 20b deployed in the second casing 14 into the casing assembly 10, the first casing 411 and the second casing 413 move relatively close to each other, the bellows 415 is compressed, the volume of the passage 415a is reduced, the space for reflecting the sound is reduced, and the low frequency response of the electroacoustic module 40 is correspondingly reduced. In other words, during the movement of the second housing 14 relative to the first housing 12, the audio characteristics of the electroacoustic module 40 may change along with the expansion area of the flexible screen module 20, thereby improving the sound effect of the electronic device 100.

In the related art, the volume of the back cavity of the electroacoustic module 40 (e.g., a speaker) of the electronic device 100 such as a smart phone for reflecting sound is generally constant, and for example, the volume of the back cavity of the electroacoustic module 40 of the electronic device 100 is generally in the range of 0.6 cubic centimeters to 1 cubic centimeter. When the electroacoustic module 40 is used for playing audio, the volume of the rear cavity is limited, and the external sound quality cannot reach a high level. In the present embodiment, the space for reflecting the sound can be changed by the telescopic deformation of the telescopic member 415, so that the sound quality of the external sound of the electroacoustic module 40 can be adaptively adjusted according to the display area of the flexible screen module 20, so as to expand the use scene of the electroacoustic module 40. For example, when the display area of the electronic device 100 is large (for example, playing a game or watching a movie), the channel 415a formed by the extended telescopic part 415 may enable the electroacoustic module 40 to have relatively good low-frequency performance, so as to improve user experience, and enable the sound quality of the electroacoustic module 40 to be matched with the picture displayed by the flexible screen module 20, that is, to implement sound-picture matching, so that the volume of the electroacoustic module 40 may be increased or better sound field balance may be implemented. When the display area of the electronic device 100 is small (for example, viewing information, browsing web pages, etc.), the volume of the channel 415a of the telescopic member 415 is reduced, and the volume of the channel 415a can be reduced to be even close to 0, so as to reduce the low-frequency performance of the electroacoustic module 40, and implement sound and picture matching again.

In the electronic device 100, the second housing 14 can move relative to the first housing 12 to drive the flexible screen module 20 to extend into the second housing 14 or retract into the housing assembly 10. When the flexible screen module 20 is deployed on the second housing 14, the electronic device 100 can obtain a relatively large display area to improve the use experience, the expansion piece 415 stretches and forms a channel 415a for expanding the sound reflection space, and the channel 415a is used as a variable part of the sound cavity 41a, so that the audio characteristic of the electroacoustic module 40 can be changed, and the sound effect of the electroacoustic module 40 can be improved; after the flexible screen module 20 deployed in the second housing 14 is retracted into the housing assembly 10, the electronic device 100 can obtain a relatively small external size for better portability, and the volume of the channel 415a is correspondingly reduced, so that the audio characteristics of the electroacoustic module 40 are changed. The electroacoustic module 40 of the electronic device 100 can adjust the audio characteristic according to the size of the display area of the flexible screen module 20, i.e., adjust the audio characteristic of the electroacoustic module 40 according to different use scenes, thereby expanding the use scenes of the electroacoustic module 40.

In the above embodiment, the first housing 411 and the second housing 413 may both be rectangular box-shaped, one end of the expansion piece 415 is connected to the first housing 411 in a sealing manner, and the other end of the expansion piece 415 opposite to the second housing 413 is connected to the second housing 413 in a sealing manner, so as to ensure the sealing performance between the channel 415a formed by the expansion piece 415 and the first housing 411 and the second housing 413, prevent the sound leakage problem at the connection between the expansion piece 415 and the first housing 411 or between the expansion piece 415 and the second housing 413, obtain better reflection and resonance effects, and improve the low-frequency performance of the electroacoustic module 40. In other embodiments, the first housing 411 and the second housing 413 may have other shapes such as a cylindrical shape.

In the present application, one of the first housing 411 and the second housing 413 is connected to the first case 12, and the other of the first housing 411 and the second housing 413 is connected to the second case 14. This arrangement facilitates assembly of the first and

second housings

411, 413 to the housing assembly 10, for example, the first housing 411 may be fixedly connected to the first housing 12 by screwing, or bonding, or welding, etc., and the second housing 413 may be fixedly connected to the second housing 14 by screwing, or bonding, or welding, etc. Compared with the structure that the first housing 411 or the second housing 413 is fixedly connected to the free portion 20b and can move along with the free portion 20b, the embodiment can prevent the telescopic member 415 from bending and deforming to reduce the fatigue life, ensure the service life of the electroacoustic module 40 and reduce the difficulty of assembly.

In the embodiment of the present application, the extensible member 415 may be a silicone member, a rubber member, or a plastic member, and a fold is formed on the extensible member 415 for guiding the deformation of the extensible member 415. The electroacoustic module 40 shown in fig. 11 is a geometric plane passing through the central axis of the telescopic member 415 corresponding to the state where the second housing 14 is in the second position, and the cross section formed by the geometric plane intersecting the telescopic member 415 is substantially in the shape of a broken line. Of course, the cross-section of the geometric plane intersecting the telescoping member 415 may also be wavy. After the flexible screen module 20 expanded from the second shell 14 is retracted into the shell assembly 10, i.e. the second shell 14 is in the second position, the telescopic member 415 is compressed by the first cover piece 411 and the second cover piece 413 to a folded state.

The folding of the expansion piece 415 may be performed by fold guiding, so that the expansion deformation of the expansion piece 415 is controllable and interference with other components inside the electronic device 100 is prevented. The thickness of the expansion 415 may be small when the expansion 415 is folded between the first cover 411 and the second cover 413. For example, the length of the telescopic member 415 in the telescopic direction (i.e. the moving direction of the second shell 14 relative to the first shell 12) in the second position may be less than 5mm, and the volume of the channel 415a formed by the telescopic member 415 may be close to 0.

Of course, it will be understood that a fold is not necessary. It is not essential that the volume of the passage 415a in the second position be close to 0, i.e. the passage 415a may always be present and the first housing 411 always communicates with the second housing 413 through the passage 415a between the first position and the second position and the first position and the second position, the passage 415a always being available for reflection and resonance of sound.

In some embodiments, in the second position, the first housing 411 and the second housing 413 may abut. In the folded state, air inside the housing 41 may flow between the diaphragm of the first electro-acoustic unit 43 and the diaphragm of the second electro-acoustic unit 45. In other words, the bellows 415 in a folded state may have a cavity such that a fluid (e.g., a gas) may flow between the diaphragm of the first electro-acoustic unit 43 and the diaphragm of the second electro-acoustic unit 45.

In the embodiment where the passage 415a is always present, when the telescopic member 415 is in the folded state, i.e., the second housing 14 is in the second position, the first electro-acoustic unit 43 is energized to generate sound, and the air in the telescopic member 415 vibrates with the diaphragm of the first electro-acoustic unit 43. Because the air in the housing 41 can flow between the diaphragm of the first electroacoustic unit 43 and the diaphragm of the second electroacoustic unit 45, the diaphragm of the second electroacoustic unit 45 can be driven by the vibrating air to vibrate, and further drive the air outside the second housing 413 to vibrate so as to generate sound.

In this embodiment, one of the first and second electro-

acoustic units

43 and 45 may be used as a main sound generating device, and the coil of the other one does not need to be energized, i.e. the diaphragm of the other one may be used as a passive radiating membrane and used for generating sound, so as to improve the low-frequency performance of the electro-acoustic module 40 in the second position. For example, in such an embodiment, it is considered that the relative movement of the first housing 411 and the second housing 413 can realize the switching of the electro-acoustic module 40 between the first state and the second state, and change the volume of the sound chamber 41a for sound reflection between the first electro-acoustic unit 43 and the second electro-acoustic unit 45453 during the relative movement. In the first state, the coil of the first electro-acoustic unit 43 may be energized to enable sound production of the first electro-acoustic unit 43, the coil of the second electro-acoustic unit 45 is in a de-energized state, and the diaphragm of the second electro-acoustic unit 45 is passively producing sound. In the second state, the coil of the first electro-acoustic unit 43 and the coil of the second electro-acoustic unit 45 are energized, respectively, to realize the sounding of both the first electro-acoustic unit 43 and the second electro-acoustic unit 45. The volume of the sound cavity 41a in the first state is different from the volume of the sound cavity 41a in the second state, so that the audio frequency characteristic of the electroacoustic module 40 in the first state may be significantly different from the audio frequency characteristic of the electroacoustic module 40 in the second state, so as to adapt to the usage status of the electronic device 10.

Of course, it will be understood that the coil of the second electro-acoustic unit 45 may be absent. In other words, the second electroacoustic unit 45 may be absent, and a diaphragm may be provided in the second housing 413 for passive sound generation.

With continued reference to fig. 10 and 11, in some embodiments, the first electro-acoustic unit 43 forms a first front chamber 411a and a first back chamber 411b that are isolated from the first housing 411. The second electroacoustic unit 45 and the second housing 413 form a second front cavity 413a and a second rear cavity 413b which are separated from each other, the first rear cavity 411b can be communicated with the second rear cavity 413b through an expansion piece 415, and the first rear cavity 411b, the second rear cavity 413b and a channel 415a of the expansion piece 415 jointly form a sound cavity 41a with a variable volume. In the embodiment in which the second electro-acoustic unit 45 is absent and the second enclosure 413 is equipped with diaphragms for passive sound production, it can be simply understood that the diaphragms form a second front chamber 413a and a second back chamber 413b, which are isolated from the second enclosure 413. With the first electro-acoustic unit 43, it is also simply understood that the other diaphragm of the first electro-acoustic unit 43 forms a first front chamber 411a and a first back chamber 411b, which are separated from the first housing 411.

In other words, in the embodiment in which the channel 415a of the telescopic member 415 in the folded state allows a fluid to flow between the diaphragm of the first electro-acoustic unit 43 and the diaphragm of the second electro-acoustic unit 45, the first back chamber 411b is always in communication with the second back chamber 413b through the telescopic member 415. In the process of switching the electronic device 100 between the first position and the second position, the telescopic part 415 generates telescopic deformation, and the formed channel 415a for reflecting sound also changes, that is, the volume of the sound cavity 41a is variable, so that the audio characteristics (frequency, loudness, etc.) of the electroacoustic module 40 can change along with the expansion area of the flexible screen module 20, thereby realizing sound and picture matching, so as to improve the sound effect of the electronic device 100 and improve the user experience.

In other embodiments, the telescopic member 415 may isolate the diaphragm of the first electro-acoustic unit 43 from the diaphragm of the second electro-acoustic unit 45 in a folded state. In other words, in this embodiment, the bellows 415 in a folded state may isolate the diaphragm of the first electro-acoustic unit 43 and the diaphragm of the second electro-acoustic unit 45 from each other. The folded telescopic part 415 may form a cavity with the diaphragm of the first electroacoustic unit 43 for sound reflection, and the folded telescopic part 415 may form another cavity with the diaphragm of the second electroacoustic unit 45 for sound reflection, and the two cavities are partitioned by the telescopic part 415, so as to reduce the mutual influence between the first electroacoustic unit 43 and the second electroacoustic unit 45, and simplify the control scheme of the electroacoustic module 40.

It is understood that at least one of the first rear cavity 411b and the second rear cavity 413b may be absent, corresponding to an embodiment in which at least one of the first housing 411 and the second housing 413 may be absent. For example, in an embodiment where the first housing 411 is absent, the first electro-acoustic unit 43 may be connected to one end of the telescopic member 415, and the first rear chamber 411b is therefore absent, and in an embodiment where the telescopic member 415 in a folded state separates the diaphragm of the first electro-acoustic unit 43 from the diaphragm of the second electro-acoustic unit 45, the telescopic member 415 may form a cavity to serve as a rear chamber of the first electro-acoustic unit 43 and to reflect sound. As another example, in an embodiment where the first back chamber 411b is absent and the bellows 415 is in a folded state such that air can flow between the diaphragm of the first electro-acoustic unit 43 and the diaphragm of the second electro-acoustic unit 45, the channel 415a and the second back chamber 413b formed by the bellows 415 may serve as a back chamber of the first electro-acoustic unit 43 for sound reflection. When the second back cavity 413b is absent, the structural design of the electroacoustic module 40 may refer to the above-mentioned scheme, and details thereof are not repeated. In particular, in the embodiment in which the first back chamber 411b and the second back chamber 413b are both absent, the channel 415a may be formed by the telescopic member 415 for sound reflection to function as a back chamber, which may simplify the structure of the electroacoustic module 40 and reduce the volume and the occupied space of the electroacoustic module 40.

Further, in the above embodiment, the arrangement of the first enclosure 411 and the second enclosure 413 may also be used as a trigger signal for the second position. For example, in embodiments where electronic device 100 includes drive mechanism 60, electronic device 100 may include a distance sensor (e.g., a pressure sensor, a hall sensor, or a photo sensor), with both drive mechanism 60 and the distance sensor (not shown) being communicatively coupled to the processor. A distance sensor is connected to at least one of the first and

second housings

411 and 413 and serves to detect a distance between the first and

second housings

411 and 413. The processor is configured to determine whether a distance between the first enclosure 411 and the second enclosure 413 is less than a preset value. When the distance is less than a preset value, the processor responds to the detection signal and disconnects the control circuit of the drive mechanism 60. In other words, when the distance between the first casing 411 and the second casing 413 is smaller than the preset value, the distance sensor may generate a trigger signal for disconnecting the control circuit of the driving mechanism 60, thereby protecting the electronic components or other structures inside the electronic device 100.

Of course, a distance sensor (e.g. a hall sensor or a photo sensor) of the electronic device 100 may also be used to generate a trigger signal to switch the operating state of the electro-acoustic module 40. For example, the distance sensor may detect a distance between the first enclosure 411 and the second enclosure 413, that is, for detecting a distance between the first enclosure 411 and the second enclosure 413. The processor is configured to control the electroacoustic module 40 to operate in the first state if the distance between the two is smaller than a preset value (the preset value may be artificially set to be 3mm, 5mm, 10mm, or the like, such as the second position), that is, the first electroacoustic unit 43 is powered on to generate sound, the second electroacoustic unit 45 is powered off, but the diaphragm of the second electroacoustic unit 45 is passively generated sound; if the distance between the first and second electroacoustic units is greater than or equal to the predetermined value (e.g. the first position), the electroacoustic module 40 is controlled to operate in the second state, i.e. the first electroacoustic unit 43 and the second electroacoustic unit 45 are both powered on to generate sound.

Of course, in the embodiment in which the electronic device 100 manually drives the second housing 14 to move relative to the first housing 12, the first housing 411 and the second housing 413 may abut against each other to limit the second housing 14 relative to the first housing 12, so as to protect electronic components or other structures inside the electronic device 100. By adopting the arrangement mode, the number of the sensors can be saved, the arrangement of the sensors in the electronic device 100 can be simplified, the positioning structures of the first shell 12 and the second shell 14 can be simplified, and the layout compactness of internal components of the electronic device 100 can be further improved.

In some embodiments, two of the electroacoustic modules 40 are spaced apart in a direction perpendicular to the moving direction of the first housing 12 relative to the second housing 14, wherein one of the electroacoustic modules 40 is disposed at one end of the flexible screen module 20, and the other electroacoustic module 40 is disposed at the opposite end of the flexible screen module 20. In other words, in the present embodiment, one of the electroacoustic modules 40 is disposed on one side of the second housing 14 with respect to the moving direction of the first housing 12, and the other electroacoustic module 40 is disposed on the other side of the second housing 14 with respect to the moving direction of the first housing 12. In the process of switching the second housing 14 between the first position and the second position relative to the first housing 12, the first housing 411 and the second housing 413 of each electroacoustic module 40 can move relatively close to each other and relatively far away from each other, so as to change the size of the channel 415a formed by the telescopic member 415, and further change the audio characteristics of the electroacoustic module 40.

Specifically, referring to fig. 14 and 15, the two electroacoustic modules 40 can be divided into a first electroacoustic module S1 and a second electroacoustic module S2, and in the present embodiment, the first housing 411 of the first electroacoustic module S1 and the first housing 411 of the second electroacoustic module S2 are both fixed relative to the second housing 14, and the second housing 413 of the first electroacoustic module S1 and the second housing 413 of the second electroacoustic module S2 are both fixed relative to the first housing 12. In other words, the first electro-acoustic module S1 and the second electro-acoustic module S2 may be disposed in axial symmetry with respect to the moving direction of the second housing 14 with respect to the first housing 12. Of course, such an axially symmetrical arrangement is not necessary.

Further, in this embodiment, the first housing 411 is provided with a first sound outlet 411c communicating with the first front cavity 411a, the second housing 413 is provided with a second sound outlet 413c communicating with the second front cavity 413a, and the first sound outlet 411c and the second sound outlet 413c are provided on the same side of the electroacoustic module 40. Further, the first sound outlet hole 411c and the second sound outlet hole 413c of the first electroacoustic module S1 are both disposed at an end of the housing assembly 10 facing away from the second electroacoustic module S2, and the first sound outlet hole 411c and the second sound outlet hole 413c of the second electroacoustic module S2 are both disposed at an end of the housing assembly 10 facing away from the first electroacoustic module S1, that is, the sound outlet directions of the two electroacoustic modules 40 are opposite to each other. For example, in the present embodiment, the first sound outlet 411c and the second sound outlet 413c of one of the electroacoustic modules 40 face the bottom of the electronic device 100, so that the electronic device 100 can generate sound from the bottom. The first sound outlet 411c and the second sound outlet 413c of the other electroacoustic module 40 face the top of the electronic device 100, so that the electronic device 100 can emit sound from the top. With reference to fig. 9, when the second shell 14 moves to the first position relative to the first shell 12, the combination of the first electro-acoustic module S1 and the second electro-acoustic module S2 can obtain a better stereo effect, so as to improve the user experience. Of course, in conjunction with fig. 7, the above-mentioned structure can also make the electroacoustic module 40 have relatively good stereo effect when the second housing 14 moves to the second position relative to the first housing 12.

Further, in some embodiments, the electronic device 100 may include an angle sensor (not shown) connected to the second housing 14 and the guide 30 for detecting a rotation angle of the guide 30, wherein the angle sensor and the electroacoustic module 40 are both connected to a processor of the electronic device 100 for controlling the discharge parameter of the electroacoustic module 40 according to the rotation angle. Specifically, taking the example that the second housing 14 is moved from the second position to the first position with respect to the first housing 12, the angle sensor may employ a hall sensor or a photoelectric encoder for measuring the rotation angle of the guide member 30. The length of the flexible screen module 20 expanded to the second shell 14 can be calculated according to the rotation angle of the guide 30, and further the length of the extension 415 can be calculated, and further the volume of the channel 415a of the extension 415 can be calculated. Taking the first housing 411 having the first rear cavity 411b, the second housing 413 having the second rear cavity 413b, and the second housing 413 having the second electroacoustic unit 45 as an example, according to the volume of the channel 415a and the volumes of the first rear cavity 411b and the second rear cavity 413b, the frequency characteristic of the sound of the electroacoustic module 40 may be calculated, or a relationship curve between the audio characteristic of the electroacoustic module 40 and the relative position of the second housing 14 may be obtained, and then the sound generating characteristics (such as the frequency, loudness, and other parameters of the sound) of the first electroacoustic unit 43 and the second electroacoustic unit 45 may be adaptively adjusted, thereby obtaining a better external sound effect.

Exemplarily, in the first position, the first electro-acoustic unit 43 and the second electro-acoustic unit 45 may adopt the same discharge parameters; in the second position, the first electro-acoustic unit 43 may be controlled to output one of the left channel and the right channel, and the second electro-acoustic unit 45 may be controlled to output the other of the left channel and the right channel, so that the electronic device 100 in the first position and the second position has significantly different sound effects, so as to enhance the audio experience of the electronic device 100. For example, during normal use, when the second housing 14 is in the first position, the user can hold the second housing 14 with the left hand, hold the first housing 12 with the right hand, output the right channel from the first electro-acoustic unit 43, and output the left channel from the second electro-acoustic unit 45, so that a better sound effect can be obtained.

In the embodiment where the first housing 411 is provided with the first electro-acoustic unit 43 and the second housing 413 is provided with the second electro-acoustic unit 45, when the second housing 14 is in the second position, the distance between the first electro-acoustic unit 43 and the second electro-acoustic unit 45 is relatively smaller, the distance between two sound sources is smaller, and the radiation width is also relatively smaller, and under the condition that the radiation parameters (frequency, loudness and the like) are the same, the sound field formed by the sound of the first electro-acoustic unit 43 and the sound of the second electro-acoustic unit 45 can generate obvious improvement in sound loudness. When the second housing 14 is in the first position, compared with the second position, the distance between the first electro-acoustic unit 43 and the second electro-acoustic unit 45 is relatively larger, the distance between the two sound sources is larger, the radiation width is relatively larger, and under the condition that the radiation parameters (frequency, loudness and the like) are the same, the sound field formed by the sound of the first electro-acoustic unit 43 and the sound of the second electro-acoustic unit 45 is obviously expanded in the sound field width. In other words, in the electronic device 100 of the present application, when the second shell 14 is at the first position and the second position, the audio experience that is obviously different can be generated, that is, the electronic device 100 can obtain the audio experience matched with the form, and obtain a better sound effect.

In the embodiment that is equipped with a plurality of intermediate positions between primary importance and second position, can set for different playing parameters according to different positions to realize different playing effects in different positions, and then richen the use scene of electroacoustic module 40. Further, the length of the flexible screen module 20 extending out of the housing assembly 10 may be divided into sections, and the discharge parameters of the electroacoustic module 40 may be set according to the length sections in combination with the volumes of the channel 415a, the first rear chamber 411b and the second rear chamber 413b. When the extending length of the flexible screen module 20 is in a certain interval, the processor may directly set the playback parameters of the electroacoustic module 40 to the corresponding playback parameters in the interval.

Above-mentioned configuration, to the less condition of no intermediate position or intermediate position between primary importance and the second place, also when the expansion area of flexible screen module 20 possesses bigger randomness, still can realize that the parameter of putting outward of electroacoustic module 40 matches better with the display area of flexible screen module 20, realizes better sound and picture matching, promotes user's experience. And this control mode of dividing the interval can also avoid the treater to frequently adjust the sound production characteristic of electroacoustic module 40 to can guarantee the life of electroacoustic module 40. In other embodiments, other sensors, such as a photoelectric sensor, may be further used to directly or indirectly measure the extended length of the flexible screen module 20, so as to adaptively adjust the discharge parameters of the electroacoustic module 40, which is not described herein again.

In some embodiments, the electronic device 100 includes a power amplifier driving unit (not shown), and the first electro-acoustic module S1 and the second electro-acoustic module S2 are both communicatively connected to the power amplifier driving unit. For example, the performance parameters of the first electroacoustic module S1 and the second electroacoustic module S2 may be the same, and may be communicatively connected to the same intelligent power amplifier driving unit, thereby saving the number of power amplifier driving units, saving the device cost, and saving the occupied space of the power amplifier driving unit to improve the compactness of the device layout and facilitate the light and thin design of the electronic device 100. Further, in this embodiment, when the second housing 14 moves to the first position or the second position or the middle position relative to the first housing 12, the first electro-acoustic module S1 and the second electro-acoustic module S2 may use the same external parameters, so as to improve the sound effect of the electronic device 100, reduce the difficulty of software configuration, and reduce the probability of error.

In other embodiments, the electronic device 100 includes two power amplifier driving units, and both of the two power amplifier driving units may be smart power amplifier driving units. One of the power amplifier driving units is connected to the first electroacoustic module S1 in a communication mode, and the other power amplifier driving unit is connected to the second electroacoustic module S2 in a communication mode. The first electro-acoustic module S1 and the second electro-acoustic module S2 may have the same structural parameters and performance parameters. In this embodiment, when the second housing 14 moves to the first position or the second position or the middle position relative to the first housing 12, the first electro-acoustic module S1 and the second electro-acoustic module S2 may adopt different external parameters to improve the sound effect of the electronic device 100.

In other embodiments, the first and second

electroacoustic units

43 and 45 of the first electroacoustic module S1 and the first and second

electroacoustic units

43 and 45 of the second electroacoustic module S2 are respectively provided with a power amplifier driving unit and can be independently controlled. In other words, in this embodiment, the first electro-acoustic unit 43 and the second electro-acoustic unit 45 of each electro-acoustic module 40 may be correspondingly provided with a smart power amplifier driving unit, and the first electro-acoustic unit 43 and the second electro-acoustic unit 45 may be independently controlled and output four channels of audio signals to obtain the surround sound effect. For example, when the first electro-acoustic module S1 and the second electro-acoustic module S2 are in an operating state, the first electro-acoustic module and the second electro-acoustic module may output four audio signals (two first electro-acoustic units 43 and two second electro-acoustic units 45), and a better surround sound effect may be achieved through a phase difference between the four audio signals.

It is understood that in the embodiment of the present application, the structural parameters and the performance parameters of the first electro-acoustic unit 43 and the second electro-acoustic unit 45 may be the same. In other words, the definitions of "first" and "second" are for convenience of description, and it should not be understood that the structural parameters and performance parameters of the first electro-acoustic unit 43 and the second electro-acoustic unit 45 are necessarily different. For example, in the present embodiment, "the first electro-acoustic unit 43" may also be regarded as "the second electro-acoustic unit 45" and "the second electro-acoustic unit 45" may also be regarded as "the first electro-acoustic unit 43".

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electroacoustic module, comprising:

the first electroacoustic unit is positioned in the sound cavity; and

the second electro-acoustic unit is positioned in the sound cavity;

when the first electro-acoustic unit is in a first state, the first electro-acoustic unit is used for being electrified to sound so as to drive the second electro-acoustic unit to sound passively; and when the first state is a second state, the first electro-acoustic unit and the second electro-acoustic unit are respectively electrified to produce sound, and the volume of the sound cavity in the first state is different from that in the second state.

2. The electro-acoustic module set forth in claim 1, wherein said housing includes a bellows having at least a portion of said acoustic chamber, said bellows being adapted to telescopically deform to allow a volume of said acoustic chamber to be variable.

3. The electro-acoustic module as claimed in claim 2, wherein said housing comprises a first housing and a second housing, said first housing being connected to one end of said telescopic member and said second housing being connected to the opposite end of said telescopic member, said first electro-acoustic unit being disposed within said first housing and said second electro-acoustic unit being disposed within said second housing; the first housing, the first electro-acoustic unit, the telescopic piece, the second housing and the second electro-acoustic unit jointly enclose to form the sound cavity.

4. The electro-acoustic module as claimed in claim 3, wherein said bellows stretches and forms a passage for enlarging a sound reflecting space when said first housing and said second housing are moved relatively away from each other; when the first cover shell and the second cover shell move relatively close to each other, the telescopic piece contracts to enable the channel to be shrunk.

5. The electro-acoustic module according to claim 3, characterised in that said first electro-acoustic unit forms a first front chamber and a first rear chamber, separated from said first housing; the second electroacoustic unit and the second housing form a second front cavity and a second rear cavity which are separated from each other, the first rear cavity is communicated with the second rear cavity through the telescopic piece, and the sound cavity comprises the first rear cavity and the second rear cavity.

6. The electro acoustic module according to any one of the claims 1-5, characterised in that said second electro acoustic unit comprises a diaphragm and a coil; when the loudspeaker is in a first state, the coil is powered off, and the first electroacoustic unit drives the vibrating diaphragm to vibrate and sound; and when the vibration diaphragm is in a second state, the coil is electrified to drive the vibration diaphragm to vibrate and sound.

7. An electronic device, comprising:

the flexible screen module is arranged on the shell component; and

the electro-acoustic module of any one of claims 1-6, wherein the housing is disposed within the housing assembly, and wherein at least a portion of the flexible screen module enters and exits the housing assembly and causes the volume of the acoustic chamber to change during sliding movement of the second housing relative to the first housing.

8. The electronic device of claim 7, wherein the flexible screen module comprises a fixed portion and a free portion, the fixed portion and the free portion being opposite to each other, the fixed portion being connected to the first housing, the free portion being capable of entering and exiting the housing assembly; one end of the housing is fixed relative to a position of one of the first housing, the second housing, and the free portion, and the other end of the housing is fixed relative to a position of one of the remaining two of the first housing, the second housing, and the free portion.

9. The electronic device according to claim 8, wherein one end of the housing is fixedly connected to one of the first case and the second case, and the other opposite end of the housing is fixedly connected to the other of the first case and the second case.

10. The electronic device of claim 9, wherein two of the electro-acoustic modules are disposed at an interval in a direction perpendicular to a moving direction of the first housing relative to the second housing, one of the electro-acoustic modules is disposed at one end of the flexible screen module, and the other of the electro-acoustic modules is disposed at the other end of the flexible screen module.

11. The electronic device of claim 10, wherein the sound emitting directions of the two electroacoustic modules are opposite to each other.

12. The electronic device according to claim 10, characterized by comprising any of the following aspects:

the electronic equipment comprises a power amplifier driving unit, and the two electroacoustic modules are both in communication connection with the power amplifier driving unit;

the electronic equipment comprises two power amplifier driving units, and the two power amplifier driving units are in one-to-one correspondence with and are in communication connection with the two electroacoustic modules;

the two first electro-acoustic units and the two second electro-acoustic units are respectively and correspondingly provided with a power amplifier driving unit and can be independently controlled.

13. The electronic device of claim 7, comprising a guide member rotatably connected to an end of the second housing remote from the first housing, the flexible screen module bypassing the guide member, an angle sensor connected to the second housing and the guide member for detecting a rotation angle of the guide member, the angle sensor, the first electro-acoustic unit, and the second electro-acoustic unit all communicatively connected to the processor, and a processor for controlling a discharge parameter of the first electro-acoustic unit and the second electro-acoustic unit according to the rotation angle.

14. The electronic device of claim 7, comprising a distance sensor, a driving mechanism and a processor, wherein the distance sensor and the driving mechanism are both in communication connection with the processor, the distance sensor is connected to at least one of the first housing and the second housing and is configured to detect a sliding distance of the second housing relative to the first housing, and the driving mechanism is configured to drive the first housing to move relative to the second housing; the processor is configured to:

if the distance is smaller than a preset value, controlling the electroacoustic module to work in a first state;

and if the distance is greater than or equal to a preset value, controlling the electroacoustic module to work in a second state.

15. An electroacoustic module, comprising:

the first electroacoustic unit is arranged in the first housing; and

the vibrating diaphragm is arranged in the second housing; the volume of the space for sound reflection between the first electro-acoustic unit and the diaphragm is variable during the movement of the second housing relative to the first housing.

16. The electro-acoustic module of claim 15, wherein the electro-acoustic module includes a bellows, one end of the bellows being connected to the first housing, the other end of the bellows being connected to the second housing; during the movement of the first housing relative to the second housing, the telescoping member deforms and changes the space for sound reflection.

17. The electro-acoustic module according to claim 16, characterised in that said first electro-acoustic unit forms a first front chamber and a first rear chamber, separated from said first housing; the vibrating diaphragm and the second housing form a second front cavity and a second rear cavity which are separated from each other, and the first rear cavity is communicated with the second rear cavity through the telescopic piece.

18. An electronic device, comprising:

the flexible screen module is arranged on the shell component; and

the electro-acoustic module of any one of claims 15-17, said housing being disposed within said housing assembly, at least a portion of said flexible screen module moving into and out of said housing assembly during sliding of said second housing relative to said first housing, and said first housing moving relative to said second housing to cause a change in volume of a space for sound reflection between said first electro-acoustic element and said diaphragm.