A sound generating component and electronic device

Abstract

An embodiment of the present invention provides a sound-generating component and an electronic device. The embodiment of the present invention arranges an electromagnetic drive system and a piezoelectric drive system on the inner side of a vibration component, and inputs different electrical signals to the electromagnetic drive system and the piezoelectric drive system, respectively controlling the electromagnetic drive system and the piezoelectric drive system, so that the sound-generating component has both the low-frequency characteristics of the electromagnetic drive system and the high-frequency characteristics of the piezoelectric drive system, and comprehensively obtains wide-band sound reproduction, which can improve the sound quality of the sound-generating component.

Description

Technical Field

[0001] The present invention relates to the field of electronic devices, and in particular to a sound-generating component and an electronic device. Background Art

[0002] The screen-sounding smartphone allows you to hear high-quality sound by placing your ear close to any part of the screen, which makes it easier to answer calls and makes the call clearer. The receiver structure is revolutionary removed from the smartphone, achieving a full mirror design. The front of the phone can also be waterproof and dustproof.

[0003] However, the sound effect of existing screen sound technology needs to be improved. Summary of the invention

[0004] In view of this, the present invention provides a sound component and an electronic device to improve the sound quality of the sound component.

[0005] In a first aspect, the sound generating component provided by an embodiment of the present invention includes:

[0006] Vibrating components;

[0007] An electromagnetic drive system, fixedly connected to the inner side of the vibration component, and used to drive the vibration component to vibrate and generate sound within a first frequency range;

[0008] The piezoelectric drive system is fixedly connected to the inner side of the vibration component and is used to drive the vibration component to vibrate and generate sound within a second frequency range.

[0009] Preferably, the piezoelectric drive system and the electromagnetic drive system are respectively directly fixedly connected to the inner side of the vibration component.

[0010] Preferably, the electromagnetic drive system is fixedly connected to a first position on the inner side of the vibration component; and the piezoelectric drive system is fixedly connected to a second position on the inner side of the vibration component.

[0011] Preferably, the electromagnetic drive system comprises:

[0012] A basin frame having a receiving cavity and an opening facing upward;

[0013] A front cover, covering the upper end surface of the basin frame to close the opening of the basin frame;

[0014] A magnetic component, disposed in the accommodating cavity of the basin frame and fixedly connected to the front cover, for forming a magnetic gap;

[0015] A voice coil, wherein a first end of the voice coil is fixedly connected to the basin frame, and a second end of the voice coil is arranged in the magnetic gap;

[0016] The electromagnetic drive system is fixedly connected to the inner side of the vibration component in such a way that the upper surface of the front cover is fixedly connected to the first position of the vibration component.

[0017] Preferably, a rubber pad is provided between the lower surface of the front cover and the upper end surface of the basin frame.

[0018] Preferably, the piezoelectric drive system comprises:

[0019] The bracket comprises a receiving portion and a connecting portion extending downward from a second surface of the receiving portion, wherein the receiving portion is provided with a connecting hole penetrating the receiving portion;

[0020] A piezoelectric sheet, the piezoelectric sheet is located below the bracket, and two ends of the piezoelectric sheet are fixedly connected to the outer periphery of the connecting hole;

[0021] A support member, the support member is located above the bracket, the upper surface of the support member is fixedly connected to the second position inside the vibration component, the lower surface of the support member has a boss protruding outward, and the boss passes through the connection hole and is fixedly connected to the piezoelectric sheet;

[0022] A circuit board is partially disposed below the bracket and is electrically connected to the piezoelectric sheet.

[0023] Preferably, the electromagnetic drive system is directly fixedly connected to the inner side of the vibration component; and the piezoelectric drive system is fixedly connected to the inner side of the vibration component by being fixedly connected to the electromagnetic drive system.

[0024] Preferably, the electromagnetic drive system comprises:

[0025] A basin frame having a receiving cavity and an opening facing upward;

[0026] A front cover, covering the upper end surface of the basin frame to close the opening of the basin frame;

[0027] A magnetic component, disposed in the accommodating cavity of the basin frame and fixedly connected to the front cover, for forming a magnetic gap;

[0028] A voice coil, wherein a first end of the voice coil is fixedly connected to the basin frame, and a second end of the voice coil is arranged in the magnetic gap;

[0029] The electromagnetic drive system is fixedly connected to the inner side of the vibration component in the following manner: the upper surface of the front cover is fixedly connected to a third position on the inner side of the vibration component;

[0030] The piezoelectric drive system comprises:

[0031] The piezoelectric sheet has an upper surface fixedly connected to the lower surface of the front cover.

[0032] Preferably, the piezoelectric drive system is directly fixedly connected to the inner side of the vibration component; and the electromagnetic drive system is fixedly connected to the inner side of the vibration component by being fixedly connected to the piezoelectric drive system.

[0033] Preferably, the electromagnetic drive system comprises:

[0034] A basin frame having a receiving cavity and an opening facing upward;

[0035] A front cover, covering the upper end surface of the basin frame to close the opening of the basin frame, and having a fixing block protruding from the front cover on the upper surface;

[0036] A magnetic component, disposed in the accommodating cavity of the basin frame and fixedly connected to the front cover, for forming a magnetic gap;

[0037] A voice coil, wherein a first end of the voice coil is fixedly connected to the basin frame, and a second end of the voice coil is arranged in the magnetic gap;

[0038] The piezoelectric drive system comprises:

[0039] A support member, wherein the upper surface of the support member is fixedly connected to a fourth position on the inner side of the vibration component, and the lower surface of the support member has a boss protruding outward;

[0040] A piezoelectric sheet, wherein the upper surface of the piezoelectric sheet is fixedly connected to the lower surface of the boss, and the two ends of the lower surface of the piezoelectric sheet are fixedly connected to the upper surface of the fixed block;

[0041] A circuit board is arranged on the front cover and is electrically connected to the piezoelectric sheet.

[0042] In a second aspect, an embodiment of the present invention provides an electronic device, the electronic device comprising:

[0043] A sound-generating assembly as described in any one of the first aspects.

[0044] An embodiment of the present invention provides a sound-generating component and an electronic device. The embodiment of the present invention arranges an electromagnetic drive system and a piezoelectric drive system on one side of a vibration component, and inputs different electrical signals to the electromagnetic drive system and the piezoelectric drive system, respectively controlling the electromagnetic drive system and the piezoelectric drive system, so that the sound-generating component has both the low-frequency characteristics of the electromagnetic drive system and the high-frequency characteristics of the piezoelectric drive system, and comprehensively obtains wide-band sound reproduction, which can improve the sound quality of the sound-generating component. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0046] Figure 1is a bottom view of the sound generating assembly of the first embodiment of the present invention;

[0047] Figure 2 is an exploded view of the piezoelectric drive system of the sound generating assembly of the first embodiment of the present invention;

[0048] Figure 3 is a three-dimensional diagram of a piezoelectric drive system of a sound generating assembly according to a first embodiment of the present invention;

[0049] Figure 4 The piezoelectric drive system of the first embodiment of the present invention is Figure 3 Sectional view along line AA;

[0050] Figure 5 is a three-dimensional diagram of a support member of a sound generating assembly according to a first embodiment of the present invention;

[0051] Figure 6 is an exploded view of the electromagnetic drive system of the sound generating assembly of the first embodiment of the present invention;

[0052] Figure 7 is a three-dimensional diagram of the electromagnetic drive system of the sound-generating assembly of the first embodiment of the present invention;

[0053] Figure 8 The electromagnetic drive system of the sound generating component of the first embodiment of the present invention is Figure 7 Sectional view of the middle BB line;

[0054] Fig. 9 is a bottom view of a sound generating assembly according to a second embodiment of the present invention;

[0055] Fig.10 is an exploded view of an electromagnetic drive system and a piezoelectric drive system of a sound generating assembly according to a second embodiment of the present invention;

[0056] Fig.11 is a stereoscopic diagram of an electromagnetic drive system and a piezoelectric drive system of a sound generating assembly according to a second embodiment of the present invention;

[0057] Fig.12 The electromagnetic drive system and the piezoelectric drive system of the sound generating component of the second embodiment of the present invention are Fig.11 Section view of the mid-CC line;

[0058] Fig.13 is a bottom view of a sound generating assembly according to a third embodiment of the present invention;

[0059] Fig.14 is an exploded 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;

[0060] Fig.15 is a stereoscopic diagram of an electromagnetic drive system and a piezoelectric drive system of a sound generating assembly according to a third embodiment of the present invention;

[0061] Fig.16 The electromagnetic drive system and the piezoelectric drive system of the sound generating component of the third embodiment of the present invention are Fig.15 Sectional view of the mid-DD line;

[0062] Fig.17 These are frequency response curves of the sound-generating component, the electromagnetic drive system alone, and the piezoelectric drive system alone according to an embodiment of the present invention.

[0063] Description of reference numerals:

[0064] 10 vibration component; 20 electromagnetic drive system; 201 basin frame; 202 voice coil; 203 magnetic component; 2031 pole piece; 2032 center magnet; 2033 side magnet; 2034 yoke; 204 rubber pad; 205 front cover; 2051 fixing block; 206 supporting ring; 30 piezoelectric drive system; 301 support member; 3011 boss; 302 piezoelectric sheet; 303 circuit board; 304 bracket; 3041 accommodating part; 3042 connecting part; 3043 connecting hole. DETAILED DESCRIPTION

[0065] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the detailed description of the embodiments of the present invention below, some specific details are described in detail. It is possible for those skilled in the art to fully understand the present invention without the description of these details. In order to avoid confusing the essence of the present invention, known methods, processes, flows, components and circuits are not described in detail.

[0066] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0067] Unless the context clearly requires otherwise, words such as “include”, “including” and the like in the specification should be interpreted as including rather than being exclusive or exhaustive; that is, as meaning “including but not limited to”.

[0068] In the description of the embodiments of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In addition, in the description of the embodiments of the present invention, unless otherwise specified, "plurality" means two or more.

[0069] Unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0070] 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, directly engaged to, connected to or coupled to another element or layer, or there may be intermediate elements or layers. 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 intermediate elements or layers. 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 or all combinations of one or more associated listed items.

[0071] For ease of explanation, spatially relative terms such as "inside", "outside", "below", "below", "lower", "above", "upper", etc. are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that spatially relative terms may be intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figure is turned over, the elements described as being "below" or "below" other elements or features will then be positioned as being "above" the other elements or features. Thus, the example term "below" can include both the orientations of above and below. The device may be oriented in other ways, and the spatially relative descriptors used herein should be interpreted accordingly.

[0072] It should be understood that the "fixed connection" in the embodiment of the present invention can be achieved by various connection methods such as bonding, clamping and bolting. Among them, bonding can be formed by forming an adhesive layer between two components through glue or double-sided tape, thereby forming a fixed connection.

[0073] The existing screen sound generation technology is mainly divided into two categories, electromagnetic drive and piezoelectric drive. The two drive modes have their own characteristics. Among them, the electromagnetic drive screen sound generation has good low-frequency reproduction, but the mid-high frequency performance is insufficient; while the piezoelectric drive screen sound generation has good mid-high frequency performance, but the low-frequency bandwidth is insufficient and the low-frequency reproduction is poor.

[0074] In view of this, the present invention proposes a hybrid screen sound component, which has both the low-frequency sound effects of electromagnetically driven screen sound and the mid- and high-frequency sound effects of piezoelectrically driven screen sound, thereby expanding the screen sound bandwidth and improving the volume and timbre.

[0075] The sound-generating component of the embodiment of the present invention includes: a vibration component 10 , an electromagnetic driving system 20 or a piezoelectric driving system 30 .

[0076] The electromagnetic drive system 20 and the piezoelectric drive system 30 are respectively fixedly connected to the inner side of the vibration component 10. The electromagnetic drive system 20 is used to drive the vibration component 10 to vibrate and make sound in a first frequency range; the piezoelectric drive system 30 is used to drive the vibration component 10 to vibrate and make sound in a second frequency range.

[0077] The vibration component 10 can be a mobile phone screen, a computer screen, a TV screen, or a diaphragm. In the following embodiments, the vibration component 10 is taken as a mobile phone screen for example. For ease of explanation, in the following embodiments, the description is made when the outer side of the mobile phone screen is facing upward. The height described below is the direction perpendicular to the mobile phone screen.

[0078] Figure 1 FIG. 2 is a bottom view of the sound generating assembly of the first embodiment of the present invention. Figure 1 As shown, the piezoelectric drive system 30 and the electromagnetic drive system 20 are respectively directly fixedly connected to the inner side of the vibration component 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.

[0079] Specifically, the electromagnetic drive system 20 is fixedly connected to a first position on the inner side of the vibration component 10. The piezoelectric drive system 30 is fixedly connected to a second position on the inner side of the vibration component 10. In an optional implementation, the midlines of the first position and the second position can coincide with the midline of the vibration component 10, respectively. In this embodiment, the mobile phone screen is a rounded rectangle, and the midline is parallel to the long side of the mobile phone screen. That is, the electromagnetic drive system 20 and the piezoelectric drive system 30 are symmetrical relative to the midline parallel to the long side of the mobile phone screen, thereby allowing the mobile phone screen to be subjected to symmetrical driving forces, and the sound of the mobile phone screen in all directions can be uniform.

[0080] It should be understood that the first position and the second position in the accompanying drawings are exemplary, and the first position and the second position can be set at any position on the mobile phone screen. The relative position relationship between the first position and the second position can also be adaptively adjusted as needed. In another optional implementation, by adjusting the first position and the second position, the center of gravity of the electromagnetic drive system 20 and the piezoelectric drive system 30 coincides with the center of the mobile phone screen. In this way, the compliance of the mobile phone screen can be further adjusted to achieve the effect of improving the sound quality.

[0081] Figure 2 1 is an exploded view of the piezoelectric drive system of the sound generating component according to the first embodiment of the present invention. Figure 3 It is a three-dimensional diagram of the piezoelectric drive system of the sound generating component according to the first embodiment of the present invention. Figure 4 The piezoelectric drive system of the first embodiment of the present invention is Figure 3 The cross-section of the AA line. Figure 2-4 As shown, the piezoelectric driving system of this embodiment includes: a support member 301 , a bracket 304 , a piezoelectric sheet 302 and a circuit board 303 .

[0082] Figure 5 FIG. 1 is a perspective view of a support member of a sound generating assembly according to a first embodiment of the present invention. Figure 2-5 As shown, the support member 301 is a rectangular flat plate, and the size of the support member 301 is smaller than the size of the mobile phone screen. The lower surface of the support member 301 has a boss 3011 protruding outward. The boss 3011 is a rectangular boss 3011, and is located at the center of the lower surface of the support member 301. In other words, the center of the boss 3011 coincides with the center of the support member 301. The support member 301 is located above the bracket 304, and the upper surface is fixedly connected to the second position on the inner side of the vibration component 10. The lower surface of the boss 3011 is fixedly connected to the middle area of ​​the upper surface of the piezoelectric sheet 302.

[0083] It should be understood that the size of the support member 301 can be adaptively adjusted as needed. If the area where the support member 301 is bonded to the screen is increased, the screen vibration area can be increased and the vibration sensitivity can be improved. The size of the boss 3011 is small to reduce the area where the support member 301 is fixedly connected to the piezoelectric sheet 302. The small contact area can avoid affecting the deformation amplitude of the piezoelectric sheet 302 and can further improve the vibration sensitivity.

[0084] The bracket 304 includes a housing portion 3041 and a connecting portion 3042 extending downward from the second surface of the housing portion 3041, and the housing portion 3041 is provided with a connecting hole 3043 penetrating the housing portion 3041. Part of the housing portion 3041 of the bracket 304 is located 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 the middle frame of the mobile phone (not shown in the figure). 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.

[0085] The piezoelectric sheet 302 is located below the bracket 304, and both ends 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 piezoelectric material. Due to the inverse piezoelectric effect, the piezoelectric sheet 302 will deform according to the frequency of the electrical signal, thereby forming vibration. The inverse piezoelectric effect refers to the phenomenon that the mechanical deformation of the crystal is caused by applying an alternating electric field to the crystal. The piezoelectric sheet 302 is mainly made of materials such as piezoelectric ceramics, piezoelectric polymers or composite piezoelectrics. In this embodiment, the piezoelectric sheet 302 is made of piezoelectric ceramics, which has the advantages of small size, light weight, and fast response speed. In this embodiment, the piezoelectric sheet 302 is in the shape of a long strip, and the short side of the piezoelectric sheet 302 is fixedly connected to the receiving portion 3041 of the bracket 304; that is, the two ends of the piezoelectric sheet 302 are fixedly connected to the bottom surface of the receiving portion 3041 of the bracket 304, so that the middle part of the piezoelectric sheet 302 is suspended below the connecting hole 3043 of the receiving portion 3041. The size of the short side of the piezoelectric sheet 302 is smaller than the size of the connection hole 3043, that is, the long side of the piezoelectric sheet 302 does not contact the connection hole 3043. The height of the connection 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.

[0086] The circuit board 303 is partially disposed under the bracket 304 and is electrically connected to 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.

[0087] When the piezoelectric sheet 302 expands and contracts along the long side of the piezoelectric sheet 302 in response to the received electrical signal, the piezoelectric sheet 302 bulges upward or downward, which in turn drives the support member 301 directly connected to the upper surface of the piezoelectric sheet 302 to vibrate up and down, thereby applying a force to the mobile phone screen, causing the mobile phone screen to vibrate in the second frequency range, thereby driving the mobile phone screen to vibrate and make sound.

[0088] It should be understood that the function of the bracket 304 in this embodiment is to fix the piezoelectric sheet 302 and the mobile phone middle frame. In other optional implementations, the bracket 304 can have various structures. For example, the bracket 304 can be a cantilever beam structure bracket 304. Corresponding to different structures, the bracket 304 can have various different connection modes with the piezoelectric sheet 302. For example, the bracket 304 can also be arranged below the piezoelectric sheet 302.

[0089] Figure 6 It is an exploded view of the electromagnetic driving system of the sound generating component of the first embodiment of the present invention. Figure 7 It is a stereoscopic diagram of the electromagnetic driving system of the sound generating component according to the first embodiment of the present invention. Figure 8 The electromagnetic drive system of the sound generating component of the first embodiment of the present invention is Figure 7 The cross-section of the BB line. Figure 6-Figure 8 As shown, the electromagnetic drive system 20 described in this embodiment includes: a basin frame 201, a front cover 205, a magnetic component 203, a voice coil 202 and a rubber pad 204.

[0090] In this embodiment, the basin frame 201 is a rectangular box with an opening at the top. In other optional implementations, the cross-section of the basin frame 201 can be circular or polygonal, etc., and can be adaptively adjusted as needed. The shapes and sizes of the magnetic component 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 basin frame 201.

[0091] The basin frame 201 has a receiving cavity with an opening facing upwards. The lower surface of the basin frame 201 is used to be fixedly connected to the mobile phone middle frame (not shown in the figure).

[0092] The front cover 205 covers the upper end surface of the basin frame 201 to close the opening of the basin frame 201. The lower surface of the front cover 205 is fixedly connected to the upper end surface of the basin frame 201. The upper surface of the front cover 205 is fixedly connected to the mobile phone screen. Specifically, the electromagnetic drive system 20 is fixedly connected to the inner side of the vibration component 10, and the upper surface of the front cover 205 is fixedly connected to the first position of the vibration component 10.

[0093] In an optional implementation, a rubber pad 204 is provided on the upper end surface of the basin frame 201. The rubber pad 204 is a rectangular folded ring that matches the upper end surface of the basin frame 201. The rubber pad 204 is specifically a material with a certain elastic deformation, specifically silicone or rubber. In other words, the rubber pad 204 is made of a material with a certain elasticity. The elastic rubber pad 204 is provided between the basin frame 201 and the front cover 205, so that the relative position of the basin frame 201 and the mobile phone screen has a certain change space.

[0094] Specifically, according to the structure and working principle of the electromagnetic drive 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 and contraction. The electromagnetic drive system 20 of the first embodiment of the present invention can be simplified into a relatively simple elastic system. The hardness of the screen and the edge clamping state determine the elastic characteristics of the elastic system. The weight of the magnetic circuit system is the weight of the simplified elastic system. Then the eigenfrequency of this elastic system is:

[0095]

[0096] Where F0 is the system eigenfrequency value, M ms is the magnetic circuit weight, C ms is the screen compliance. The system eigenfrequency F0 and the magnetic circuit weight M ms , Screen compliance C ms Inversely proportional to the square root of . That is, the heavier the magnetic circuit and the softer the screen, the lower the system's intrinsic frequency, and the better the low-frequency response characteristics. Therefore, the low-frequency response characteristics of the system can be adjusted by adjusting the weight of the magnetic circuit and the compliance of the screen.

[0097] The magnetic component 203 is arranged in the accommodating cavity of the basin frame 201 and is fixedly connected to the front cover 205. The magnetic component 203 is used to form a magnetic gap. Specifically, the magnetic component 203 can be a three-magnetic circuit structure, a five-magnetic circuit structure or a single-magnetic circuit structure. In this embodiment, the magnetic component 203 is described by taking the five-magnetic circuit structure as an example. The magnetic component 203 in this embodiment includes a central magnet 2032 and four side magnets 2033. The central magnet is a rounded rectangular parallelepiped, the central axis of the central magnet 2032 coincides with the central axis of the basin frame 201, and the side magnets 2033 are arranged on the four sides of the central magnet 2032. The lower surface of the central magnet 2032 and the lower surface of the side magnet 2033 are respectively fixedly connected with a lower pole piece 2031, and the lower pole piece 2031 is used for magnetic conduction. A yoke 2034 is fixedly connected to the upper surface of the central magnet 2032, which is used to seal the magnetic force in the magnetic gap and improve 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 a rectangular sheet, and the size of the yoke 2034 is substantially equal to or slightly smaller than the size of the inner circumference of the rubber pad.

[0098] The voice coil 202 is a wire coil wound in a cylindrical form. The first end of the voice coil 202 is fixedly connected to the basin frame 201, and the second end of the voice coil 202 is arranged in the magnetic gap.

[0099] When a current-carrying conductor passes through a magnetic field, it will be subjected to an Ampere force, the direction of which conforms to Fleming's left-hand rule. The Ampere force is perpendicular to the current and magnetic field directions, and the magnitude of the Ampere force is proportional to the current, the length of the wire, and the magnetic induction intensity. When the voice coil 202 inputs an alternating audio current, the voice coil 202 becomes a current-carrying conductor and is subjected to an alternating driving force from the magnetic component 203 to produce an alternating motion. At the same time, the voice coil 202 also exerts an equal and opposite reaction force on the magnetic component 203. When the voice coil 202 is supplied with alternating current, the driving force generated by the voice coil 202 on the magnetic component 203 changes with the electrical signal. The magnetic component 203 drives the front cover 205 fixedly connected thereto to vibrate, and ultimately drives the mobile phone screen fixedly connected to the front cover 205 to vibrate within the first frequency range, thereby driving the mobile phone screen to vibrate and make sounds.

[0100] The electromagnetic driving system 20 further includes a circuit structure for electrically connecting to the voice coil 202 to input an electrical signal to the voice coil 202 .

[0101] In the second embodiment of the present invention, the electromagnetic drive system 20 is directly fixedly connected to the inner side of the vibration component 10. The piezoelectric drive system 30 is fixedly connected to the inner side of the vibration component 10 by being fixedly connected to the electromagnetic drive system 20.

[0102] Fig. 9 4 is a bottom view of the sound generating assembly according to the second embodiment of the present invention. Fig.10 It is an exploded view of the electromagnetic drive system and the piezoelectric drive system of the sound generating component of the second embodiment of the present invention. Fig.11 It is a stereoscopic diagram of the electromagnetic drive system and the piezoelectric drive system of the sound generating component of the second embodiment of the present invention. Fig.12 The electromagnetic drive system and the piezoelectric drive system of the sound generating component of the second embodiment of the present invention are Fig.11 The cross-section of the CC line. Figure 9-12 As shown, the electromagnetic drive system 20 includes: a basin frame 201 , a front cover 205 , a magnetic component 203 , a rubber pad 204 , a support ring 206 and a voice coil 202 .

[0103] The difference between the electromagnetic drive system 20 in this embodiment and the electromagnetic drive system 20 in the first embodiment is that the yoke 2034 in this embodiment is fixedly connected to the lower surface of the front cover 205 through a folded ring-shaped support ring 206. The size of the support ring 206 is smaller than the size of the rubber pad 204, and is located on the inner side of the annular rubber pad 204. As a result, 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 drive system 30 includes a piezoelectric sheet 302, which is located in the cavity, and the upper surface of the piezoelectric sheet 302 is fixedly connected to the 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.

[0104] The sound-generating component also includes a circuit structure, which is used to electrically connect 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 the electrical signal, the voice coil 202 gives the magnetic component an electromagnetic driving force through the principle of electromagnetic induction, so that the magnetic component 203 vibrates, thereby driving the front cover 205 fixedly connected to the magnetic component 203 through the support ring 206 and the mobile phone screen fixedly connected to the front cover 205 to vibrate and make a sound. When the piezoelectric sheet 302 receives the electrical signal, it also drives the front cover 205 fixedly connected to it and the mobile phone screen fixedly connected to the front cover 205 to vibrate and make a 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 central area of ​​the front cover 205. As a result, the sound-generating component has two different vibration frequencies at the same time.

[0105] This embodiment controls the electromagnetic drive system 20 and the piezoelectric drive system 30 respectively through independent input signals, so that the sound-generating component 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 wide-band sound reproduction.

[0106] In the third embodiment of the present invention, the piezoelectric drive system 30 is directly fixedly connected to the inner side of the vibration component 10. The electromagnetic drive system 20 is fixedly connected to the inner side of the vibration component 10 by being fixedly connected to the piezoelectric drive system 30.

[0107] Fig.13 4 is a bottom view of the sound generating assembly according to the third embodiment of the present invention. Fig.14 It is an exploded view of the electromagnetic drive system and the piezoelectric drive system of the sound-generating component of the third embodiment of the present invention. Fig.15 It is a stereoscopic diagram of the electromagnetic drive system and the piezoelectric drive system of the sound generating component of the third embodiment of the present invention. Fig.16The electromagnetic drive system and the piezoelectric drive system of the sound generating component of the third embodiment of the present invention are Fig.15 The cross-sectional view of the DD line. Figure 13-16 As shown, the electromagnetic drive system 20 comprises: a basin frame 201, a front cover 205, a magnetic assembly 203 and a voice coil 202. The difference between the electromagnetic drive system 20 of this embodiment and the electromagnetic drive system 20 of the first embodiment is that the upper surface of the front cover 205 has a fixing block 2051 protruding from the front cover 205.

[0108] A recessed area corresponding to the shape of the end of the piezoelectric sheet 302 is provided above the fixing block 2051. The two fixing blocks 2051 are 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 side surfaces of the two fixing blocks 2051 is less than the length of the piezoelectric sheet 302.

[0109] The piezoelectric driving system 30 includes: a support member 301 , a piezoelectric sheet 302 and a circuit board 303 .

[0110] The difference between the piezoelectric drive system 30 of this embodiment and the piezoelectric drive system 30 of the first embodiment is that the upper surface of the piezoelectric sheet 302 is fixedly connected to the lower surface of the support member 301, and the two ends of the lower surface of the piezoelectric sheet 302 are fixedly connected to the upper surface of the fixing block 2051. Specifically, the two ends of the piezoelectric sheet 302 are arranged in the recessed area of ​​the fixing block 2051. The circuit board 303 is arranged on the front cover 205 and is electrically connected to the piezoelectric sheet 302.

[0111] The sound-generating component also includes a circuit structure for electrically connecting to 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 support member 301 to vibrate and then drives the mobile phone screen to vibrate at a first frequency. The voice coil 202 drives the front cover 205 and the support member 301 to vibrate and then drives the mobile phone screen to vibrate at a second frequency. In this embodiment, the piezoelectric system is arranged on the electromagnetic drive system 20, which can facilitate the wiring of the circuit structure and improve the processing efficiency.

[0112] Fig.17 These are the frequency response curves of the sound-emitting component, the separate electromagnetic drive system, and the separate piezoelectric drive system of the embodiment of the present invention. The curves in the figure are the frequency response curves of the electromagnetic drive and piezoelectric drive screen sound, respectively. It can be seen that the frequency response curve of the separate electromagnetic drive system has a higher low frequency and a lower sensitivity in the middle and high frequencies; while the frequency response curve of the separate piezoelectric drive system has a lower sensitivity in the low frequency and a higher sensitivity in the middle and high frequencies. The sound-emitting component of the embodiment of the present invention, which is driven by a hybrid of the electromagnetic drive system and the piezoelectric drive system, can combine the advantages of separate electromagnetic drive and separate piezoelectric drive screen sound to obtain a frequency response with a wider bandwidth, and ultimately improve the sound quality.

[0113] In a fourth embodiment of the present invention, an electronic device is provided, and the electronic device may be a mobile phone, a tablet computer, a television, a game console, a display, etc. The electronic device includes the sound-emitting component described in the first embodiment, the second embodiment, and the third embodiment. Thus, the electronic device has the technical effects similar to those of the sound-emitting component described in the first embodiment, the second embodiment, and the third embodiment.

[0114] The embodiment of the present invention arranges an electromagnetic drive system and a piezoelectric drive system on one side of a vibration component, and inputs different electrical signals to the electromagnetic drive system and the piezoelectric drive system, thereby controlling the electromagnetic drive system and the piezoelectric drive system respectively, so that the sound-generating component has both the low-frequency characteristics of the electromagnetic drive system and the high-frequency characteristics of the piezoelectric drive system, thereby comprehensively obtaining wide-band sound reproduction and improving the sound quality of the sound-generating component.

[0115] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sound-generating component, characterized in that: The sound generating component comprises: Vibrating component (10); An electromagnetic drive system (20), comprising a basin frame (201), a front cover (205), a voice coil (202), a magnetic assembly (203) and a support ring (206), wherein the basin frame (201) has a receiving cavity, the receiving cavity has an opening facing upward, the voice coil (202) and the magnetic assembly (203) are arranged in the receiving cavity, the front cover (205) covers the upper end surface of the basin frame (201) to close the opening of the basin frame (201), the upper surface of the front cover (205) is fixedly connected to a third position on the inner side of the vibration component (10), the support ring (206) is arranged on the lower surface of the front cover (205), a cavity is formed inside the support ring (206), and the electromagnetic drive system (200) is used to drive the vibration component (10) to vibrate and generate sound within a first frequency range; and The piezoelectric drive system (30) comprises a piezoelectric sheet (302), wherein the piezoelectric sheet (302) is arranged in the cavity, and the upper surface of the piezoelectric sheet (302) is fixedly connected to the lower surface of the front cover (205), and the lower surface of the piezoelectric sheet (302) is suspended. The piezoelectric drive system (30) is used to drive the vibration component (10) to vibrate and generate sound within a second frequency range, and the piezoelectric drive system (30) is fixedly connected to the electromagnetic drive system (20).

2. The sound generating assembly according to claim 1, characterized in that: The magnetic component (203) is fixedly connected to the front cover (205) to form a magnetic gap; The first end of the voice coil (202) is fixedly connected to the basin frame (201), and the second end of the voice coil (202) is arranged in the magnetic gap.

3. An electronic device, characterized in that: The electronic device comprises: A sound-generating assembly as claimed in any one of claims 1 to 2.

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