CN213342662U

CN213342662U - Sound production subassembly and electronic equipment

Info

Publication number: CN213342662U
Application number: CN202022144245.5U
Authority: CN
Inventors: 张韬; 闫鑫; 何二苏
Original assignee: KING TONE INNOVATION
Current assignee: KING TONE INNOVATION
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-06-01
Anticipated expiration: 2030-09-25

Abstract

The embodiment of the utility model provides a sound production subassembly and electronic equipment, the embodiment of the utility model provides a set up electromagnetic drive system and piezoelectricity actuating system through the inboard at vibration part to electromagnetic drive system and the different signal of telecommunication of piezoelectricity actuating system input, control electromagnetic drive system and piezoelectricity actuating system respectively, make sound production subassembly possess electromagnetic drive system's low frequency characteristic and piezoelectricity actuating system's high frequency characteristic simultaneously, synthesize and obtain broadband sound and replay, can improve sound production subassembly's tone quality.

Description

Sound production subassembly and electronic equipment

Technical Field

The utility model relates to an electron device field especially relates to a sound production subassembly and electronic equipment.

Background

The screen sounding smart phone can enable ears to be close to any position of a screen to hear high-quality sound, so that answering is facilitated and the call effect is clearer. The earphone structure is revolutionarily cancelled on the smart phone, and the full-mirror design is realized. And the waterproof and dustproof functions of the front side of the mobile phone can be realized.

However, the sound effect of the existing screen sound technology still needs to be improved.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a sound production subassembly and electronic equipment to improve the tone quality of sound production subassembly.

First aspect, the embodiment of the utility model provides a sound production subassembly includes:

a vibrating member;

the electromagnetic driving system is fixedly connected with the inner side of the vibration component and is used for driving the vibration component to vibrate and sound in a first frequency range;

and the piezoelectric driving system is fixedly connected with the inner side of the vibration component and is used for driving the vibration component to vibrate and sound in a second frequency range.

Preferably, the piezoelectric driving system and the electromagnetic driving system are respectively and fixedly connected with the inner side of the vibration part.

Preferably, the electromagnetic drive system is fixedly connected at a first position inside the vibration part; the piezoelectric driving system is fixedly connected to a second position on the inner side of the vibration part.

Preferably, the electromagnetic drive system comprises:

a tub frame having an accommodating chamber with an opening facing upward;

the front cover covers the upper end face of the basin stand so as to seal the opening of the basin stand;

the magnetic assembly is arranged in the accommodating cavity of the basin stand, is fixedly connected with the front cover and is used for forming a magnetic gap;

the first end of the voice coil is fixedly connected with the basin frame, and the second end of the voice coil is arranged in the magnetic gap;

the electromagnetic driving system is fixedly connected with the inner side of the vibration component, specifically, the upper surface of the front cover is fixedly connected with the first position of the vibration component.

Preferably, a rubber pad is arranged between the lower surface of the front cover and the upper end surface of the basin stand.

Preferably, the piezoelectric driving system includes:

the bracket comprises an accommodating part and a connecting part extending downwards from a second surface of the accommodating part, and the accommodating part is provided with a connecting hole penetrating through the accommodating part;

the piezoelectric sheet is positioned below the bracket, and two ends of the piezoelectric sheet are fixedly connected with the periphery of the connecting hole;

the support piece is positioned above the bracket, the upper surface of the support piece is fixedly connected with the second position of the inner side of the vibration part, the lower surface of the support piece is provided with a boss protruding outwards, and the boss penetrates through the connecting hole and is fixedly connected with the piezoelectric sheet;

and the circuit board is partially arranged below the bracket and is electrically connected with the piezoelectric sheet.

Preferably, the electromagnetic driving system is directly and fixedly connected with the inner side of the vibration component; the piezoelectric driving system is fixedly connected with the electromagnetic driving system so as to be fixedly connected with the inner side of the vibration component.

Preferably, the electromagnetic drive system comprises:

a tub frame having an accommodating chamber with an opening facing upward;

the electromagnetic driving system is fixedly connected with the inner side of the vibration component, specifically, the upper surface of the front cover is fixedly connected with a third position of the inner side of the vibration component;

the piezoelectric drive system includes:

and the upper surface of the piezoelectric sheet is fixedly connected with the lower surface of the front cover.

Preferably, the piezoelectric driving system is directly and fixedly connected with the inner side of the vibration component; the electromagnetic driving system is fixedly connected with the piezoelectric driving system so as to be fixedly connected with the inner side of the vibration component.

Preferably, the electromagnetic drive system comprises:

a tub frame having an accommodating chamber with an opening facing upward;

the front cover covers the upper end face of the basin frame to seal the opening of the basin frame, and the upper surface of the front cover is provided with a fixing block protruding out of the front cover;

the piezoelectric drive system includes:

the upper surface of the supporting piece is fixedly connected with a fourth position of the inner side of the vibration part, and the lower surface of the supporting piece is provided with a boss protruding outwards;

the upper surface of the piezoelectric sheet is fixedly connected with the lower surface of the boss, and two ends of the lower surface of the piezoelectric sheet are fixedly connected with the upper surface of the fixing block;

and the circuit board is arranged on the front cover and is electrically connected with the piezoelectric sheet.

In a second aspect, an embodiment of the present invention provides an electronic device, including:

the sound emitting assembly of any one of the first aspect.

The embodiment of the utility model provides a sound production subassembly and electronic equipment, the embodiment of the utility model provides a through set up electromagnetic drive system and piezoelectricity actuating system in one side of vibration part to electromagnetic drive system and the different signal of telecommunication of piezoelectricity actuating system input, control electromagnetic drive system and piezoelectricity actuating system respectively, make the sound production subassembly possess electromagnetic drive system's low frequency characteristic and piezoelectricity actuating system's high frequency characteristic simultaneously, synthesize and obtain broadband sound and replay, can improve the tone quality of sound production subassembly.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a bottom view of a sound emitting assembly according to a first embodiment of the present invention;

fig. 2 is an exploded view of the piezoelectric drive system of the sound emitting assembly of the first embodiment of the present invention;

fig. 3 is a perspective view of a piezoelectric driving system of a sound emitting assembly according to a first embodiment of the present invention;

fig. 4 is a cross-sectional view of the piezoelectric drive system of the first embodiment of the present invention taken along line AA of fig. 3;

fig. 5 is a perspective view of a support member of the sound emitting assembly of the first embodiment of the present invention;

fig. 6 is an exploded view of the electromagnetic drive system of the sound emitting assembly of the first embodiment of the present invention;

fig. 7 is a perspective view of an electromagnetic drive system of a sound emitting assembly according to a first embodiment of the present invention;

fig. 8 is a cross-sectional view of the electromagnetic driving system of the sound generating unit according to the first embodiment of the present invention along line BB in fig. 7;

fig. 9 is a bottom view of a sound emitting assembly of a second embodiment of the present invention;

fig. 10 is an exploded view of the electromagnetic and piezoelectric drive systems of the sound generating assembly of the second embodiment of the present invention;

fig. 11 is a perspective view of an electromagnetic drive system and a piezoelectric drive system of a sound emitting assembly according to a second embodiment of the present invention;

fig. 12 is a cross-sectional view of the electromagnetic drive system and the piezoelectric drive system of the sound generating assembly of the second embodiment of the present invention taken along line CC of fig. 11;

fig. 13 is a bottom view of a sound emitting assembly of a third embodiment of the present invention;

fig. 14 is an exploded view of the electromagnetic and piezoelectric drive systems of the sound generating assembly of the third embodiment of the present invention;

fig. 15 is a perspective view of an electromagnetic drive system and a piezoelectric drive system of a sound emitting assembly according to a third embodiment of the present invention;

fig. 16 is a cross-sectional view of the electromagnetic drive system and the piezoelectric drive system of the sound generating unit according to the third embodiment of the present invention, taken along line DD in fig. 15;

fig. 17 is a frequency response curve of the sound generating assembly, the single electromagnetic driving system and the single piezoelectric driving system according to the embodiment of the present invention.

Description of reference numerals:

10 a vibrating member; 20 an electromagnetic drive system; 201 a basin stand; 202 a voice coil; 203 a magnetic component; 2031 pole piece; 2032 a central magnet; 2033 a side magnet; 2034 a yoke; 204 rubber pad; 205 a front cover; 2051 fixing blocks; 206 support the ring; 30 a piezoelectric drive system; 301 a support member; 3011 a boss; 302 a piezoelectric sheet; 303 a circuit board; 304 a support; 3041 an accommodating part; 3042 a linker; 3043 connecting the holes.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of embodiments of the invention, certain specific details are set forth. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the embodiments of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the embodiments of the present invention, "a plurality" means two or more unless otherwise specified.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

When an element or layer is referred to as being "on," "engaged to," "connected to" or "coupled to" another element or layer, it may be directly on, engaged, connected or coupled to the other element or layer or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly engaged to," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a similar manner. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Spatially relative terms, such as "inner," "outer," "below," "lower," "above," "upper," and the like, are used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device may be otherwise oriented and the spatially relative descriptors used herein interpreted accordingly.

It should be understood that "fixed connection" in the embodiments of the present invention may be implemented by various connection methods such as bonding, clamping, and bolt connection. Wherein, the bonding can be to form an adhesive layer between the two components by glue or double-sided tape, etc., so as to form a fixed connection.

The existing screen sounding technology mainly comprises two types, namely electromagnetic driving and piezoelectric driving. The two driving modes have the characteristics respectively, wherein the electromagnetic driving screen has good sounding low-frequency playback, but insufficient performance of medium and high frequencies; the piezoelectric driving screen has better medium-high frequency performance, but the low-frequency bandwidth is insufficient, and the low-frequency playback is not good.

In view of this, the utility model provides a mixed type screen sound production subassembly possesses the low frequency audio of electromagnetic drive screen sound production simultaneously to and the well high frequency audio of piezoelectric drive screen sound production, extend screen sound production broadband, promote volume and tone quality.

The utility model discloses sound production subassembly includes: a vibrating component 10, an electromagnetic drive system 20, or a piezoelectric drive system 30.

The electromagnetic driving system 20 and the piezoelectric driving system 30 are respectively fixedly connected with the inner side of the vibration part 10. The electromagnetic driving system 20 is used for driving the vibration component 10 to vibrate and generate sound in a first frequency range; the piezoelectric driving system 30 is used for driving the vibration component 10 to vibrate and generate sound in the second frequency range.

The vibration component 10 may be a mobile phone screen, a computer screen, a television screen, or a diaphragm. In the following embodiments, the vibration member 10 is exemplified as a mobile phone screen. For convenience of explanation, in the following embodiments, the description is made in a state where the outer side of the screen of the cellular phone is directed upward. The height described below is the direction perpendicular to the cell phone screen.

Fig. 1 is a bottom view of a sound emitting assembly according to a first embodiment of the present invention. As shown in fig. 1, the piezoelectric driving system 30 and the electromagnetic driving system 20 are respectively and fixedly connected to the inner side of the vibration member 10. The vibration component 10 is a mobile phone screen, and the inner side of the vibration component 10 is the side of the mobile phone screen facing the inside of the mobile phone.

Specifically, the electromagnetic drive system 20 is fixedly attached at a first position inside the vibration member 10. The piezoelectric drive system 30 is fixedly attached at a second location inside the vibrating member 10. In an alternative implementation, the centerlines of the first and second positions may coincide with the centerline of the vibration member 10, respectively. In this embodiment, the mobile phone screen is a rounded rectangle, and the central line is parallel to the long side of the mobile phone screen. Namely, the electromagnetic driving system 20 and the piezoelectric driving system 30 are symmetrical relative to a center line parallel to the long sides of the mobile phone screen, so that the mobile phone screen can be driven by symmetrical driving force, and the sound in all directions of the mobile phone screen can be uniform and consistent.

It should be understood that the first position and the second position in the drawings are exemplary, and the first position and the second position can be arranged at any position of the mobile phone screen. The relative position relationship between the first position and the second position can also be adaptively adjusted as required. In another alternative implementation, the first position and the second position are adjusted so that the center of gravity of the electromagnetic drive system 20 and the piezoelectric drive system 30 coincides with the center of the screen of the mobile phone. Therefore, the compliance of the mobile phone screen can be further adjusted, and the effect of improving the tone quality is achieved.

Fig. 2 is an exploded view of the piezoelectric driving system of the sound emitting module according to the first embodiment of the present invention. Fig. 3 is a perspective view of a piezoelectric driving system of a sound emitting module according to a first embodiment of the present invention. Fig. 4 is a cross-sectional view of the piezoelectric driving system according to the first embodiment of the present invention along line AA in fig. 3. As shown in fig. 2 to 4, the piezoelectric driving system of the present embodiment includes: support member 301, support 304, piezoelectric sheet 302 and circuit board 303.

Fig. 5 is a perspective view of the support member of the sound emitting assembly according to the first embodiment of the present invention. As shown in fig. 2 to 5, the supporting member 301 is a rectangular flat plate, and the size of the supporting member 301 is smaller than that of the mobile phone screen. The lower surface of the support member 301 has an outwardly protruding boss 3011. The boss 3011 is a rectangular boss 3011 and is located at the central position of the lower surface of the supporting member 301. That is, the center of the boss 3011 and the center of the support 301 coincide. The supporting member 301 is located above the bracket 304, and the upper surface is fixedly connected to the second position of the inner side of the vibration part 10. The lower surface of the boss 3011 is fixedly connected to the middle region of the upper surface of the piezoelectric sheet 302.

It should be understood that the size of the supporting member 301 can be adjusted adaptively according to the requirement, and if the area of the supporting member 301 bonded to the screen is increased, the vibration area of the screen can be increased, and the sensitivity of the vibration can be improved. The size of the boss 3011 is less to reduce the area of support piece 301 and piezoelectric patch 302 fixed connection, area of contact is less, can avoid influencing the deformation range of piezoelectric patch 302, can further promote the sensitivity of vibration.

The bracket 304 includes an accommodating portion 3041 and a connecting portion 3042 extending downward from a second surface of the accommodating portion 3041, and the accommodating portion 3041 is provided with a connecting hole 3043 penetrating through the accommodating portion 3041. A portion of the housing 3041 of the holder 304 is positioned between the support member 301 and the piezoelectric sheet 302. The boss 3011 passes through the connecting hole 3043 and is fixedly connected to the piezoelectric sheet 302. The connecting portion 3042 is used to be fixedly connected to a middle frame (not shown) of a mobile phone. By fixing the bracket 304 on the middle frame of the mobile phone, the stability of the connection between the support member 301 and the piezoelectric sheet 302 and the screen can be improved.

The piezoelectric sheet 302 is located below the bracket 304, and two ends of the piezoelectric sheet are fixedly connected to the receiving portion 3041 at the edge of the connecting hole 3043. The piezoelectric sheet 302 is a sheet structure made of a piezoelectric material. Due to the inverse piezoelectric effect, the piezoelectric sheet 302 deforms according to the frequency of the electrical signal, thereby generating vibration. The inverse piezoelectric effect refers to a phenomenon that an alternating electric field is applied to a crystal to cause mechanical deformation of the crystal. The piezoelectric sheet 302 is mainly made of piezoelectric ceramics, piezoelectric polymers, or composite piezoelectrics. In this embodiment, the piezoelectric sheet 302 is made of piezoelectric ceramic, and has the advantages of small volume, light weight, and fast response speed. In this embodiment, the piezoelectric sheet 302 is long, and the short side of the piezoelectric sheet 302 is fixedly connected to the accommodating portion 3041 of the holder 304; that is, two ends of the piezoelectric sheet 302 are fixedly connected to the bottom surface of the accommodating portion 3041 of the bracket 304, so that the middle portion of the piezoelectric sheet 302 is suspended below the connecting hole 3043 of the accommodating portion 3041. The short side of the piezoelectric sheet 302 has a smaller size than the connecting hole 3043, that is, the long side of the piezoelectric sheet 302 does not contact with the connecting hole 3043. The height of the connecting portion 3042 between the piezoelectric sheet 302 and the bracket 304 is greater than the thickness of the piezoelectric sheet 302. The lower surface of the piezoelectric sheet 302 is suspended.

And the circuit board 303 is partially arranged below the bracket 304 and is electrically connected with the piezoelectric sheet 302. The circuit board 303 has a predetermined circuit, and is electrically connected to the electrodes on the piezoelectric sheet 302 to transmit an electrical signal to the piezoelectric sheet 302.

When the piezoelectric patch 302 stretches in the direction along the long edge of the piezoelectric patch 302 in response to the received electric signal, the piezoelectric patch 302 protrudes upwards or downwards, and then the support member 301 directly connected with the upper surface of the piezoelectric patch 302 is driven to vibrate up and down, so that an acting force is applied to the mobile phone screen, the mobile phone screen vibrates in the second frequency range, and the mobile phone screen is driven to vibrate and sound.

It should be understood that the support 304 of the present embodiment is used to fixedly connect the piezoelectric sheet 302 to the middle frame of the mobile phone, and in alternative implementations, the support 304 may have various structures, for example, the support 304 may be a cantilever beam structure support 304. The holder 304 may have various different connections to the piezoelectric sheet 302 corresponding to different configurations, for example, the holder 304 may be disposed below the piezoelectric sheet 302.

Fig. 6 is an exploded view of the electromagnetic driving system of the sound generating module according to the first embodiment of the present invention. Fig. 7 is a perspective view of an electromagnetic driving system of a sound generating unit according to a first embodiment of the present invention. Fig. 8 is a cross-sectional view of the electromagnetic driving system of the sound generating unit according to the first embodiment of the present invention along line BB in fig. 7. As shown in fig. 6 to 8, the electromagnetic driving system 20 of the present embodiment includes: a frame 201, a front cover 205, a magnetic assembly 203, a voice coil 202, and a rubber pad 204.

In this embodiment, the tub 201 is a rectangular parallelepiped box with an upper opening. In other alternative implementations, the cross section of the basin stand 201 can be circular, polygonal, and the like, and can be adapted as needed. The shape and size of the magnetic assembly 203, the front cover 205, the voice coil 202, and the rubber pad 204 are adaptively set according to the shape and size of the frame 201.

The tub 201 has a receiving cavity with an opening facing upward. The lower surface of the basin frame 201 is used for being fixedly connected with a middle frame (not shown in the figure) of the mobile phone.

The front cover 205 covers the upper end surface of the tub 201 to close the opening of the tub 201. The lower surface of the front cover 205 is fixedly connected with the upper end surface of the basin stand 201. The upper surface of the front cover 205 is fixedly connected with the mobile phone screen. Specifically, the electromagnetic driving system 20 is fixedly connected to the inner side of the vibration component 10, that is, the upper surface of the front cover 205 is fixedly connected to the first position of the vibration component 10.

In an alternative implementation manner, a rubber pad 204 is arranged on the upper end face of the basin stand 201. The rubber pad 204 is a rectangular folded ring matched with the upper end face of the basin stand 201. The rubber pad 204 is specifically made of a material with a certain elastic deformation amount, and specifically is made of silica gel or rubber. That is, the rubber pad 204 is made of a material having a certain elasticity. An elastic rubber pad 204 is arranged between the basin frame 201 and the front cover 205, so that a certain change space is formed in the relative position of the basin frame 201 and the mobile phone screen.

Specifically, according to the structure and the operation principle of the electromagnetic driving system 20 of the first embodiment of the present invention, the annular rubber pad 204 is made of a soft material with a certain amount of expansion. The electromagnetic driving system 20 of the first embodiment of the present invention can be simplified into a relatively simple elastic system, the degree of hardness and softness of the screen and the edge clamping condition determine the elastic characteristics of the elastic system, and the weight of the magnetic circuit system is the weight of the simplified elastic system. The eigenfrequency of the elastic system is:

wherein F₀Is the system eigenfrequency value, M_msIs the weight of the magnetic circuit, C_msThe screen smoothness is obtained. System eigenfrequency F₀With magnetic circuit weight M_msScreen compliance C_msIs inversely proportional to the square of. That is, the heavier the magnetic circuit and the softer the screen, the lower the system eigenfrequency and the better the final low-frequency response characteristic. Therefore, the low-frequency response characteristic of the system can be adjusted by adjusting the weight of the magnetic circuit and the compliance of the screen.

The magnetic assembly 203 is arranged in the accommodating cavity of the basin stand 201 and is fixedly connected with the front cover 205. The magnetic assembly 203 is used to form a magnetic gap. Specifically, the magnetic assembly 203 may be a three-magnetic-circuit structure, a five-magnetic-circuit structure, or a single-magnetic-circuit structure. In the present embodiment, the magnetic assembly 203 is illustrated by taking a five-magnetic-circuit structure as an example. The magnetic assembly 203 in this embodiment includes a center magnet 2032 and four side magnets 2033. The central magnet is a round cuboid, the central axis of the central magnet 2032 coincides with the central axis of the basin stand 201, and the side magnets 2033 are arranged on four side surfaces of the central magnet 2032. A lower pole piece 2031 is fixedly connected to the lower surface of the central magnet 2032 and the lower surface of the side magnet 2033, respectively, and the lower pole piece 2031 is used for magnetic conduction. A yoke 2034 is fixedly attached to an upper surface of the center magnet 2032 for confining the magnetic force in the magnetic gap and improving the efficiency of the magnetic assembly 203. The upper surface of the yoke 2034 is fixedly connected to the lower surface of the front cover 205. The yoke 2034 is rectangular and has a size of the yoke 2034 substantially equal to or slightly smaller than the size of the inner circumference of the rubber mat.

The voice coil 202 is a wire coil wound in a cylindrical form. The first end of the voice coil 202 is fixedly connected with the frame 201, and the second end of the voice coil 202 is arranged in the magnetic gap.

When a current-carrying conductor passes through a magnetic field, the current-carrying conductor is subjected to an ampere force, the direction of the ampere force accords with the Fleming left-hand rule, the directions of the ampere force and the current and the magnetic field are mutually vertical, and the magnitude of the ampere force is in direct proportion to the current, the length of a lead and the magnetic induction intensity. When an alternating audio current is input to the voice coil 202, the voice coil 202 becomes a current-carrying conductor and is subjected to an alternating driving force of the magnetic assembly 203 to generate an alternating motion, and meanwhile, the voice coil 202 has a reaction force with equal magnitude and opposite direction on the magnetic assembly 203. When the voice coil 202 is energized with an electric current, the voice coil 202 generates a driving force on the magnetic assembly 203 which varies with the electric signal. The magnetic component 203 drives the front cover 205 fixedly connected with the magnetic component to vibrate, and finally pushes the mobile phone screen fixedly connected with the front cover 205 to vibrate in a first frequency range, so as to drive the mobile phone screen to vibrate and sound.

The electromagnetic drive system 20 further includes a circuit structure for electrically connecting with the voice coil 202 to input an electrical signal to the voice coil 202.

In the second embodiment of the present invention, the electromagnetic driving system 20 is directly and fixedly connected to the inner side of the vibration component 10. The piezoelectric driving system 30 is fixedly connected with the electromagnetic driving system 20 to be fixedly connected with the inner side of the vibration part 10.

Fig. 9 is a bottom view of the sound emitting assembly according to the second embodiment of the present invention. Fig. 10 is an exploded view of the electromagnetic drive system and the piezoelectric drive system of the sound generating module according to the second embodiment of the present invention. Fig. 11 is a perspective view of an electromagnetic driving system and a piezoelectric driving system of a sound generating assembly according to a second embodiment of the present invention. Fig. 12 is a cross-sectional view of the electromagnetic driving system and the piezoelectric driving system of the sound generating module according to the second embodiment of the present invention, taken along the line CC in fig. 11. As shown in fig. 9-12, the electromagnetic drive system 20 includes: a frame 201, a front cover 205, a magnetic assembly 203, a rubber pad 204, a support ring 206 and a voice coil 202.

The electromagnetic driving system 20 in the present embodiment is different from the electromagnetic driving system 20 in the first embodiment in that the yoke 2034 in the present embodiment is fixedly connected to the lower surface of the front cover 205 through the support ring 206 in the folded ring shape. The support ring 206 is smaller than the rubber pad 204 and is located inside the annular rubber pad 204. Thus, a cavity is formed between the upper surface of the yoke 2034, the support ring 206, and the lower surface of the front cover 205. The support ring 206 is made of an inelastic material. The piezoelectric driving system 30 includes a piezoelectric sheet 302, the piezoelectric sheet 302 is located in the cavity, and an upper surface of the piezoelectric sheet 302 is fixedly connected to a lower surface of the front cover 205. The height of the support ring 206 is greater than the thickness of the piezoelectric sheet 302, that is, the lower surface of the piezoelectric sheet 302 is suspended.

The sound generating assembly further includes a circuit structure for electrically connecting the voice coil 202 and the piezoelectric sheet 302, respectively, to input independent electrical signals to the voice coil 202 and the piezoelectric sheet 302, respectively. In this embodiment, when the voice coil 202 receives an electrical signal, the voice coil 202 gives an electromagnetic driving force to the magnetic assembly through an electromagnetic induction principle, so that the magnetic assembly 203 vibrates, and further drives the front cover 205 fixedly connected with the magnetic assembly 203 through the support ring 206 and the mobile phone screen fixedly connected with the front cover 205 to vibrate and sound. When the piezoelectric sheet 302 receives the electric signal, the front cover 205 fixedly connected with the piezoelectric sheet and the mobile phone screen fixedly connected with the front cover 205 are also driven to vibrate and sound. The driving force generated by the voice coil 202 acts on the edge area of the front cover 205 through the support ring 206, and the driving force generated by the piezoelectric sheet 302 acts on the center area of the front cover 205. Therefore, the sounding component has two different vibration frequencies simultaneously.

In the present embodiment, the electromagnetic drive system 20 and the piezoelectric drive system 30 are controlled by independent input signals, so that the sound generating unit has both the low frequency characteristics of the electromagnetic drive system 20 and the high frequency characteristics of the piezoelectric drive system 30, thereby comprehensively obtaining broadband sound reproduction.

In the third embodiment of the present invention, the piezoelectric driving system 30 is directly and fixedly connected to the inner side of the vibration member 10. The electromagnetic driving system 20 is fixedly connected with the piezoelectric driving system 30 to be fixedly connected with the inner side of the vibration part 10.

Fig. 13 is a bottom view of the sound emitting assembly according to the third embodiment of the present invention. Fig. 14 is an exploded view of the electromagnetic drive system and the piezoelectric drive system of the sound generating module according to the third embodiment of the present invention. Fig. 15 is a perspective view of an electromagnetic drive system and a piezoelectric drive system of a sound generating assembly according to a third embodiment of the present invention. Fig. 16 is a cross-sectional view of the electromagnetic driving system and the piezoelectric driving system of the sound generating assembly according to the third embodiment of the present invention, taken along line DD in fig. 15. As shown in fig. 13-16, the electromagnetic drive system 20 includes: a frame 201, a front cover 205, a magnet assembly 203, and a voice coil 202. The electromagnetic driving system 20 of the present embodiment is different from the electromagnetic driving system 20 of the first embodiment in that the upper surface of the front cover 205 has a fixing block 2051 protruding from the front cover 205.

A concave area corresponding to the shape of the end of the piezoelectric sheet 302 is arranged above the fixed block 2051. The two fixing blocks 2051 are oppositely arranged above the front cover 205, and the side surfaces of the fixing blocks 2051 are flush with the side surfaces of the front cover 205. The distance between the inner sides of the two fixing blocks 2051 is smaller than the length of the piezoelectric sheet 302.

The piezoelectric drive system 30 includes: support member 301, piezoelectric sheet 302 and circuit board 303.

The piezoelectric driving system 30 of the present embodiment is different from the piezoelectric driving system 30 of the first embodiment in that the upper surface of the piezoelectric sheet 302 is fixedly connected to the lower surface of the supporting member 301, and both ends of the lower surface of the piezoelectric sheet 302 are fixedly connected to the upper surface of the fixing block 2051. Specifically, both ends of the piezoelectric sheet 302 are disposed in the recessed regions of the fixed block 2051. A circuit board 303 is disposed on the front cover 205 and electrically connected to the piezoelectric sheet 302.

The sound generating assembly further includes a circuit structure for electrically connecting the voice coil 202 and the piezoelectric sheet 302, respectively, to input independent electrical signals to the voice coil 202 and the piezoelectric sheet 302, respectively. In this embodiment, the piezoelectric sheet 302 drives the supporting member 301 to vibrate, so as to drive the mobile phone screen to vibrate at the first frequency. The voice coil 202 drives the front cover 205 and the supporting member 301 to vibrate, so as to drive the mobile phone screen to vibrate at the second frequency. In the embodiment, the piezoelectric system is arranged on the electromagnetic driving system 20, so that the wiring of the circuit structure can be facilitated, and the processing efficiency can be improved.

Fig. 17 is a frequency response curve of the sound generating assembly, the single electromagnetic driving system and the single piezoelectric driving system according to the embodiment of the present invention. The curves in the figure are frequency response curves of the screen sound production driven by the electromagnetism and the screen sound production driven by the piezoelectricity respectively, and it can be seen that the frequency response curve of the single electromagnetism driving system is high in low frequency and low in medium-high frequency sensitivity; and the frequency response curve sensitivity of the single piezoelectric driving system is low at low frequency and high at medium and high frequencies. The embodiment of the utility model provides a by electromagnetic drive system and piezoelectric drive system hybrid drive's sound production subassembly can synthesize the advantage of independent electromagnetic drive, independent piezoelectric drive screen sound production, obtain the frequency response of bandwidth broad, finally promote tone quality.

In a fourth embodiment of the present invention, an electronic device is provided, which may be a mobile phone, a tablet computer, a television, a game machine, a display, and the like. The electronic device includes the sound emitting assembly as described in the first, second and third embodiments above. Thereby, the electronic device has the similar technical effects as the sound generating assembly described in the first, second and third embodiments.

The embodiment of the utility model provides a set up electromagnetic drive system and piezoelectricity actuating system through one side at vibration part to the different signal of telecommunication of electromagnetic drive system and piezoelectricity actuating system input, control electromagnetic drive system and piezoelectricity actuating system respectively, make the sound production subassembly possess electromagnetic drive system's low frequency characteristic and piezoelectricity actuating system's high frequency characteristic simultaneously, synthesize and obtain broadband sound and replay, can improve the tone quality of sound production subassembly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A sound generating assembly, the sound generating assembly comprising:

a vibration member (10);

the electromagnetic driving system (20) is fixedly connected with the inner side of the vibration component (10) and is used for driving the vibration component (10) to vibrate and sound in a first frequency range; and

and the piezoelectric driving system (30) is fixedly connected with the inner side of the vibration component (10) and is used for driving the vibration component (10) to vibrate and generate sound in a second frequency range.

2. The sound emitting assembly according to claim 1, characterized in that the piezoelectric drive system (30) and the electromagnetic drive system (20) are each directly fixedly connected to the inside of the vibration member (10).

3. The sound emitting assembly according to claim 2, characterized in that the electromagnetic drive system (20) is fixedly attached at a first position inside the vibration member (10); the piezoelectric driving system (30) is fixedly connected to a second position on the inner side of the vibration component (10).

4. The sound generating assembly of claim 3, wherein the electromagnetic drive system (20) comprises:

a tub frame (201) having an accommodating chamber with an opening facing upward;

a front cover (205) covering an upper end surface of the tub frame (201) to close an opening of the tub frame (201);

the magnetic assembly (203) is arranged in the accommodating cavity of the basin frame (201), is fixedly connected with the front cover (205) and is used for forming a magnetic gap;

a voice coil (202), wherein a first end of the voice coil (202) is fixedly connected with the frame (201), and a second end of the voice coil (202) is arranged in the magnetic gap;

the electromagnetic driving system (20) is fixedly connected with the inner side of the vibration component (10), specifically, the upper surface of the front cover (205) is fixedly connected with the first position of the vibration component (10).

5. The sound emitting assembly according to claim 4, characterized in that a rubber pad (204) is provided between the lower surface of the front cover (205) and the upper end surface of the basin stand (201).

6. The sound generating assembly of claim 3, wherein the piezoelectric drive system (30) comprises:

the bracket (304) comprises an accommodating part (3041) and a connecting part (3042) extending downwards from the second surface of the accommodating part (3041), wherein a connecting hole (3043) penetrating through the accommodating part (3041) is formed in the accommodating part (3041);

the piezoelectric sheet (302) is positioned below the bracket (304), and two ends of the piezoelectric sheet (302) are fixedly connected with the periphery of the connecting hole (3043);

the support piece (301) is positioned above the bracket (304), the upper surface of the support piece (301) is fixedly connected with a second position on the inner side of the vibration part (10), the lower surface of the support piece (301) is provided with a boss (3011) protruding outwards, and the boss (3011) passes through the connecting hole (3043) and is fixedly connected with the piezoelectric sheet (302);

and the circuit board (303) is partially arranged below the bracket (304) and is electrically connected with the piezoelectric sheet (302).

7. The sound emitting assembly according to claim 1, characterized in that the electromagnetic drive system (20) is directly fixedly connected to the inside of the vibration member (10); the piezoelectric driving system (30) is fixedly connected with the electromagnetic driving system (20) so as to be fixedly connected with the inner side of the vibration component (10).

8. The sound generating assembly of claim 7, wherein the electromagnetic drive system (20) comprises:

the electromagnetic driving system (20) is fixedly connected with the inner side of the vibration component (10), specifically, the upper surface of the front cover (205) is fixedly connected with a third position of the inner side of the vibration component (10);

the piezoelectric drive system (30) comprises:

and the upper surface of the piezoelectric sheet (302) is fixedly connected with the lower surface of the front cover (205).

9. The sound emitting assembly according to claim 1, characterized in that the piezoelectric drive system (30) is fixedly connected directly to the inside of the vibrating member (10); the electromagnetic driving system (20) is fixedly connected with the piezoelectric driving system (30) so as to be fixedly connected with the inner side of the vibration component (10).

10. The sound generating assembly of claim 9, wherein the electromagnetic drive system (20) comprises:

the front cover (205) covers the upper end face of the basin frame (201) to close the opening of the basin frame (201), and the upper surface of the front cover (205) is provided with a fixed block (2051) protruding out of the front cover (205);

the piezoelectric drive system (30) comprises:

the upper surface of the support piece (301) is fixedly connected with a fourth position of the inner side of the vibration part (10), and the lower surface of the support piece (301) is provided with a boss (3011) protruding outwards;

the upper surface of the piezoelectric sheet (302) is fixedly connected with the lower surface of the boss (3011), and two ends of the lower surface of the piezoelectric sheet (302) are fixedly connected with the upper surface of the fixing block (2051);

and the circuit board (303) is arranged on the front cover (205) and is electrically connected with the piezoelectric sheet (302).

11. An electronic device, characterized in that the electronic device comprises:

the sound emitting assembly of any one of claims 1-10.