Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, a vibration system of the sound production device comprises a diaphragm assembly, a voice coil assembly and a centering disk, the centering disk comprises an outer fixing part, an inner fixing part and an elastic part, two ends of the elastic part are respectively connected with the inner fixing part and the outer fixing part, the outer fixing part is connected with a shell, and the inner fixing part is connected with the shell. The inner fixing part is connected with one end of the voice coil assembly away from the diaphragm assembly; a plurality of first concave-convex structures are arranged on the surface, connected with the voice coil assembly, of the inner fixing part, an area formed by the plurality of first concave-convex structures which are distributed at intervals is a first laser etching part, and the first laser etching part is connected with the voice coil assembly in an adhesive mode; and / or, a plurality of second concave-convex structures are arranged on the surface, connected with the shell, of the outer fixing part, the area formed by the multiple second concave-convex structures distributed at intervals is a second laser etching part, and the second laser etching part is connected with the shell in an adhesive mode. The bonding force between the centering disk of the sound production device and other parts is firm, and the operation stability of a vibration system is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electro-acoustic transduction, and in particular to a sound production device and an electronic device using the same. BACKGROUND

[0002] In recent years, with the rapid development of consumer electronics, consumer electronics has been widely used and recognized by consumers. The sound production device is an important electro-acoustic transduction component in consumer electronics, and a centering sheet is usually arranged in the vibration system of the sound production device. The centering sheet can be connected to the voice coil and the shell respectively, so as to reduce the eccentricity generated by the vibration system and improve the sound production effect. Moreover, a conductive circuit can be arranged in the centering sheet, so as to play a role of connecting the voice coil lead and the external circuit.

[0003] In the related art, the centering sheet of the sound production device usually uses polyimide (PI) as a surface layer. However, polyimide has a relatively low friction force, and as a high polymer, it has a relatively low surface energy. In the case where the bonding area is limited, the bonding force will be relatively small. When the centering sheet fails to be bonded to other components of the sound production device, the centering effect on the voice coil will be affected, and the voice coil lead will be disconnected, which will affect the running stability of the sound production device. SUMMARY

[0004] The main purpose of the present application is to provide a sound production device and an electronic device, which can increase the bonding force between the centering sheet and other components when the bonding area of the centering sheet is small, prevent disconnection, and ensure the centering effect and electrical connection effect of the centering sheet.

[0005] To achieve the above purpose, the present application provides a sound production device, which comprises: a shell; and a vibration system arranged in the shell, the vibration system comprising a diaphragm assembly, a voice coil assembly, and a centering sheet, one end of the voice coil assembly being connected to the diaphragm assembly, the centering sheet comprising an outer fixed part, an inner fixed part, and an elastic part, both ends of the elastic part being connected to the inner fixed part and the outer fixed part respectively, the outer fixed part being connected to the shell, and the inner fixed part being connected to one end of the voice coil assembly away from the diaphragm assembly; The surface of the inner fixing part connected with the voice coil assembly is provided with a plurality of first concave-convex structures, and the area formed by the plurality of first concave-convex structures distributed at intervals is a first laser etching part, and the first laser etching part is adhesively connected with the voice coil assembly; and / or the surface of the outer fixing part connected with the shell is provided with a plurality of second concave-convex structures, and the area formed by the plurality of second concave-convex structures distributed at intervals is a second laser etching part, and the second laser etching part is adhesively connected with the shell.

[0006] In an embodiment, the voice coil assembly includes a voice coil and a skeleton, the skeleton includes a main body part and a connecting leg provided on the main body part, the main body part includes oppositely arranged first and second surfaces, the first surface is connected with the diaphragm assembly, the second surface is connected with the side of the voice coil close to the diaphragm assembly, one end of the connecting leg is connected with the main body part, the other end of the connecting leg is bent and extends towards the side close to the centering support piece, and the first laser etching part is adhesively connected with the end of the connecting leg away from the main body part.

[0007] In an embodiment, the voice coil assembly includes a voice coil, one end of the voice coil is connected with the diaphragm assembly, and the other end of the voice coil is adhesively connected with the first laser etching part.

[0008] In an embodiment, the inner fixing part is provided with a plurality of first concave-convex structures; wherein the first concave-convex structure is a circular groove structure, and a plurality of the circular groove structures are arranged in an array; or the first concave-convex structure is a long strip-shaped groove structure, and a plurality of the long strip-shaped groove structures are arranged in parallel at intervals; or the first concave-convex structure is a plurality of long strip-shaped groove structures arranged in cross. And / or, the outer fixing part is provided with a plurality of second concave-convex structures; wherein the second concave-convex structure is a circular groove structure, and a plurality of the circular groove structures are arranged in an array; or the second concave-convex structure is a long strip-shaped groove structure, and a plurality of the long strip-shaped groove structures are arranged in parallel at intervals; or the second concave-convex structure is a plurality of long strip-shaped groove structures arranged in cross.

[0009] In an embodiment, the inner fixing part forms the first laser etching part, the bonding area of the inner fixing part is defined as S, and the area of the first laser etching part is defined as S1. Wherein, S1 / S≥1 / 3.

[0010] In an embodiment, the outer fixing part forms the second laser etching part, the bonding area of the outer fixing part is defined as D, and the area of the second laser etching part is defined as S2. Wherein, S2 / D≥1 / 3.

[0011] In an embodiment, the centering petal comprises a conductive layer and a skin layer arranged on at least one side of the conductive layer; The inner fixing part is formed with the first laser-engraved part, the first laser-engraved part is arranged on the skin layer, and the laser-engraving depth of the first laser-engraved part is not more than 1 / 2 of the thickness of the skin layer; and / or the outer fixing part is formed with the second laser-engraved part, the second laser-engraved part is arranged on the skin layer, and the laser-engraving depth of the second laser-engraved part is not more than 1 / 2 of the thickness of the skin layer.

[0012] In an embodiment, the outer fixing part is provided with the second laser-engraved part, the outer fixing part is formed in an L shape, the outer fixing part comprises a first fixing end and a second fixing end connected in sequence, two ends of the first fixing end are respectively connected with the elastic part and the second fixing end, and the second laser-engraved part is arranged on the first fixing end.

[0013] In an embodiment, the bonding force between the first laser-engraved part and the voice coil assembly is not less than 2.5 N; And / or, the bonding force between the second laser-engraved part and the shell is not less than 2.5 N.

[0014] The application further provides an electronic device comprising the sound production device.

[0015] The sound generating device of the technical scheme of the present application realizes the installation and fixation of the vibration system by arranging the vibration system in the shell, and arranges the vibration system as a diaphragm assembly, a voice coil assembly and a centering support sheet, so that one end of the voice coil assembly is connected with the diaphragm assembly, and the centering support sheet is arranged as an outer fixation part, an inner fixation part and an elastic part connecting the outer fixation part and the inner fixation part. In this way, the outer fixation part is connected with the shell, and the inner fixation part is connected with the one end of the voice coil assembly away from the diaphragm assembly, so that the centering support sheet provides a centering effect for the voice coil assembly, avoiding the voice coil assembly driving the diaphragm assembly to swing or polarize during the vibration process. At the same time, a plurality of first concave-convex structures are arranged on the surface of the inner fixation part connected with the voice coil assembly, so that the areas where the plurality of first concave-convex structures are spaced apart form first laser-engraved parts. In this way, the first laser-engraved parts are connected with the voice coil assembly by adhesion, so that the first laser-engraved parts formed by the plurality of first concave-convex structures increase the roughness of the surface of the inner fixation part connected with the voice coil assembly, and increase the contact area between the voice coil assembly and the centering support sheet. In this way, the adhesion between the centering support sheet and the voice coil can be effectively increased, avoiding the adhesion failure between the inner fixation part and the voice coil assembly. And / or, a plurality of second concave-convex structures are arranged on the surface of the outer fixation part connected with the shell, so that the areas where the plurality of second concave-convex structures are spaced apart form second laser-engraved parts. In this way, the second laser-engraved parts are connected with the shell by adhesion, so that the second laser-engraved parts formed by the plurality of second concave-convex structures increase the roughness of the surface of the outer fixation part connected with the shell, and increase the contact area between the centering support sheet and the shell. In this way, the adhesion between the centering support sheet and the shell can be effectively increased, avoiding the adhesion failure between the outer fixation part and the shell. Therefore, through the above arrangement, the adhesion between the centering support sheet and the voice coil and / or the shell can be increased, preventing the wire breakage phenomenon, and ensuring the centering effect and the electrical connection effect of the centering support sheet. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0017] Figure 1 An exploded schematic view of an embodiment of the sound generating device provided by the present application; Figure 2 A partial structure schematic view of an embodiment of the sound generating device provided by the present application; Figure 3 A partial cross-sectional schematic view of an embodiment of the sound generating device provided by the present application; Figure 4 A partial cross-sectional schematic view of an embodiment of the sound generating device provided by the present application; Figure 3 An enlarged schematic view of position A in FIG. 8; Figure 5 Structure diagram of a first embodiment of the centering sheet provided by the present application; Figure 6 Structure diagram of a second embodiment of the centering sheet provided by the present application; Figure 7 Structure diagram of a third embodiment of the centering sheet provided by the present application; Figure 8 Structure diagram of a fourth embodiment of the centering sheet provided by the present application; Figure 9 Structure diagram of a fifth embodiment of the centering sheet provided by the present application; Figure 10 Partial cross-sectional diagram of an embodiment of the centering sheet provided by the present application.

[0018] Explanation of reference numerals: 100, sound production device; 1, shell; 2, vibration system; 21, diaphragm assembly; 211, diaphragm; 212, dome; 22, voice coil assembly; 221, voice coil; 222, skeleton; 2221, main body part; 2222, connecting leg; 23, centering sheet; 231, outer fixed part; 2311, second concave-convex structure; 2312, second laser-engraved part; 2313, first fixed end; 2314, second fixed end; 232, inner fixed part; 2321, first concave-convex structure; 2322, first laser-engraved part; 233, elastic part; 234, conductive layer; 235, skin layer; 3, magnetic circuit system; 31, magnetic yoke; 32, center magnetic part; 321, center magnet; 322, center magnetic conducting plate; 33, edge magnetic part; 331, edge magnet; 332, edge magnetic conducting plate; 34, magnetic gap.

[0019] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directionality indications also change accordingly.

[0022] Meanwhile, "and / or" or "and / or" appearing in the whole text means that it includes three schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B are satisfied at the same time.

[0023] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0024] The present application provides a sound generating device 100 applied to an electronic device. It can be understood that the electronic device can be a mobile phone, earphone, smart wearable device, smart glasses, etc., which is not limited here.

[0025] Please refer to Figures 1 to 10 As shown in the figure, in the embodiment of the present application, the sound generating device 100 includes a shell 1 and a vibration system 2, the vibration system 2 is arranged in the shell 1, the vibration system 2 includes a diaphragm assembly 21, a voice coil assembly 22 and a centering support 23, one end of the voice coil assembly 22 is connected with the diaphragm assembly 21, the centering support 23 includes an outer fixed part 231, an inner fixed part 232 and an elastic part 233, both ends of the elastic part 233 are connected with the inner fixed part 232 and the outer fixed part 231 respectively, the outer fixed part 231 is connected with the shell 1, and the inner fixed part 232 is connected with one end of the voice coil assembly 22 away from the diaphragm assembly 21; wherein the surface of the inner fixed part 232 connected with the voice coil assembly 22 is provided with a plurality of first concave-convex structures 2321, the area formed by the plurality of first concave-convex structures 2321 distributed at intervals is a first laser carving part 2322, and the first laser carving part 2322 is adhesively connected with the voice coil assembly 22; and / or, the surface of the outer fixed part 231 connected with the shell 1 is provided with a plurality of second concave-convex structures 2311, the area formed by the plurality of second concave-convex structures 2311 distributed at intervals is a second laser carving part 2312, and the second laser carving part 2312 is adhesively connected with the shell 1.

[0026] In the embodiment, the sound generating device 100 can be a sound generating unit of a loudspeaker, and the loudspeaker can be a micro loudspeaker. It should be noted that the sound generating device 100 can further include a magnetic circuit system 3, the magnetic circuit system 3 is arranged in the shell 1, and the magnetic circuit system 3 and the vibration system 2 of the sound generating device 100 are oppositely arranged. It can be understood that one end of the magnetic circuit system 3 is connected with the shell 1, the other end of the vibration system 2 is connected with the shell 1, and the vibration system 2 is oppositely arranged with the magnetic circuit system 3.

[0027] It should be noted that the shell 1 is used to mount, fix and support the magnetic circuit system 3 and the vibration system 2 and other components of the sound generating device 100, that is, the shell 1 provides a mounting basis for the magnetic circuit system 3 and the vibration system 2 and other components. It can be understood that the shell 1 can be a whole structure or a plurality of split structures matched to form, which is not limited here. The shell 1 in the embodiment can be selected as a square frame or frame structure, that is, the shell 1 has a cavity with both ends open, and the magnetic circuit system 3 and the vibration system 2 are respectively connected to both sides of the shell 1 and are oppositely arranged, so that the magnetic circuit system 3, the shell 1 and the diaphragm 311 of the vibration system 2 form a vibration cavity.

[0028] It can be understood that the sound generating device 100 is applied to an electronic device, that is, the sound generating device 100 can be installed in the electronic device through the shell 1. It should be noted that the shell 1 of the sound generating device 100 can be a shell or box structure independent of the electronic device, at this time, the shell 1 is used to integrate the magnetic circuit system 3 and the vibration system 2 and other components of the sound generating device 100 into a whole structure, thereby facilitating disassembly. Of course, the shell 1 of the sound generating device 100 can also be integrally formed with the shell or box structure of the electronic device, so as to effectively improve the structural strength and sealing performance.

[0029] In the embodiment, the shell 1 is used to accommodate and fix the vibration system 2 and the magnetic circuit system 3 and other structures, so that the sound generating device 100 can be applied to an electronic device or a sound generating module as an independent component, which is not limited here. Of course, in other embodiments, the sound generating device 100 can also be a module structure, at this time, the vibration system 2 and the magnetic circuit system 3 and other structures of the sound generating device 100 are respectively mounted on the shell of the module structure as a plurality of independent components, which is not limited here.

[0030] Alternatively, the sound generating device 100 is arranged in a rectangular shape. In the embodiment, the shell 1 of the sound generating device 100 is optionally arranged in a rectangular shape. As shown in Figure 1 and Figure 2 , the shell 1 has two first side edges and two second side edges connected at the head and tail, and the two first side edges and the two second side edges form a rectangular frame structure, and the connection of the first side edge and the second side edge forms a corner, which is the corner position of the shell 1.

[0031] In the embodiment, the vibration system 2 comprises a diaphragm assembly 21, a voice coil assembly 22 and a centering spider 23, the periphery of the diaphragm assembly 21 is connected with the shell 1, one end of the voice coil assembly 22 is connected with the diaphragm assembly 21, one end of the centering spider 23 is connected with the shell 1, and the other end of the centering spider 23 is connected with the voice coil assembly 22, the magnetic circuit system 3 is provided with a magnetic gap 34, and the voice coil assembly 22 is arranged correspondingly with the magnetic gap 34. It can be understood that the current is passed through the voice coil assembly 22, so that the voice coil assembly 22 converts the electric energy into mechanical energy in the magnetic gap 34 formed by the magnetic circuit system 3, so as to drive the voice coil assembly 22 to drive the diaphragm assembly 21 to vibrate, so as to realize sound emission, and the centering spider 23 provides the centering action for the voice coil assembly 22, so as to avoid the swing or polarization of the voice coil assembly 22 in the vibration process, so as to improve the sound emission effect of the sound emission device 100.

[0032] In the embodiment, as shown in Figure 1 、 Figures 5 to 9 , the centering spider 23 is provided as an outer fixed part 231, an inner fixed part 232 and an elastic part 233, so that the two ends of the elastic part 233 are connected with the inner fixed part 232 and the outer fixed part 231 respectively, the centering spider 23 is connected with the shell 1 by the outer fixed part 231, and the inner fixed part 232 is connected with one end of the voice coil assembly 22 away from the diaphragm assembly 21, so as to realize the installation and fixation of the centering spider 23 and the connection with the voice coil assembly 22.

[0033] It can be understood that, as shown in Figure 2 、 Figures 4 to 7 、 Figure 9 , a plurality of first concave-convex structures 2321 are arranged on the surface of the inner fixed part 232 of the centering spider 23 connected with the voice coil assembly 22, so that the first laser engraved part 2322 is formed in the region where the plurality of first concave-convex structures 2321 are spaced apart, and the first laser engraved part 2322 is used for adhesive connection with the voice coil assembly 22, so that the first laser engraved part 2322 formed by the plurality of first concave-convex structures 2321 spaced apart increases the roughness of the surface of the inner fixed part 232 of the centering spider 23, increases the bonding area between the centering spider 23 and the voice coil assembly 22, so as to increase the bonding force between the centering spider 23 and the voice coil assembly 22, so as to improve the bonding strength between the centering spider 23 and the voice coil assembly 22, and effectively reduce the problems such as bonding failure between the centering spider 23 and the voice coil assembly 22.

[0034] Of course, as Figure 8As shown, by providing multiple second concave-convex structures 2311 on the surface where the outer fixing part 231 of the centering support 23 connects to the housing 1, the areas of the multiple second concave-convex structures 2311 distributed at intervals are formed into second laser engraving parts 2312. The second laser engraving parts 2312 are used to bond and connect with the housing 1. In this way, the second laser engraving parts 2312 formed by the multiple second concave-convex structures 2311 distributed at intervals increase the surface roughness of the outer fixing part 231 of the centering support 23, increase the bonding area between the centering support 23 and the housing 1, thereby increasing the bonding force between the centering support 23 and the housing 1, improving the bonding strength between the centering support 23 and the housing 1, and effectively reducing problems such as bonding failure between the centering support 23 and the housing 1.

[0035] Optionally, such as Figure 9 As shown, the surface of the inner fixing part 232 connected to the voice coil assembly 22 is provided with a plurality of first concave-convex structures 2321. The area formed by the multiple first concave-convex structures 2321 distributed at intervals is the first laser engraving part 2322. The first laser engraving part 2322 is bonded to the voice coil assembly 22. The surface of the outer fixing part 231 connected to the housing 1 is provided with a plurality of second concave-convex structures 2311. The area formed by the multiple second concave-convex structures 2311 distributed at intervals is the second laser engraving part 2312. The second laser engraving part 2312 is bonded to the housing 1. This is not limited here.

[0036] It should be noted that the first laser-engraved portion 2322 / second laser-engraved portion 2312 on the inner fixing portion 232 / outer fixing portion 231 of the centering support 23 can be formed using laser engraving technology, that is, multiple first concave-convex structures 2321 / second concave-convex structures 2311 are formed at intervals on the connecting surface of the inner fixing portion 232 / outer fixing portion 231 using laser engraving. Understandably, the specific laser engraving process refers to existing technology and is not limited here. During the laser engraving process, when the surface of the inner fixing portion 232 / outer fixing portion 231 of the centering support 23 is processed by laser engraving, the high temperature of the laser can also remove dirt from the surface of the inner fixing portion 232 / outer fixing portion 231, while increasing the surface roughness of the inner fixing portion 232 / outer fixing portion 231 to increase the bonding area of ​​the inner fixing portion 232 / outer fixing portion 231, thereby increasing the bonding force on the surface of the centering support 23.

[0037] The sound production device 100 of the present application realizes the installation and fixation of the vibration system 2 by arranging the vibration system 2 in the shell 1, and arranges the vibration system 2 as the diaphragm assembly 21, the voice coil assembly 22 and the centering support 23, so that one end of the voice coil assembly 22 is connected with the diaphragm assembly 21, and the centering support 23 is arranged as the outer fixed part 231, the inner fixed part 232 and the elastic part 233 connecting the outer fixed part 231 and the inner fixed part 232, so that the outer fixed part 231 is connected with the shell 1, and the inner fixed part 232 is connected with the end of the voice coil assembly 22 away from the diaphragm assembly 21, thereby providing the centering effect for the voice coil assembly 22 by the centering support 23, avoiding the swing or polarization of the diaphragm assembly 21 driven by the voice coil assembly 22 during the vibration process; at the same time, a plurality of first concave-convex structures 2321 are arranged on the surface of the inner fixed part 232 connected with the voice coil assembly 22, so that the area of the plurality of first concave-convex structures 2321 distributed at intervals forms the first laser engraved part 2322, thereby realizing the adhesive connection between the first laser engraved part 2322 and the voice coil assembly 22, so that the first laser engraved part 2322 formed by the plurality of first concave-convex structures 2321 increases the roughness of the surface of the inner fixed part 232 connected with the voice coil assembly 22, increases the contact area between the voice coil assembly 22 and the centering support 23, so that the adhesive force between the centering support 23 and the voice coil 221 can be effectively increased, avoiding the adhesive failure between the inner fixed part 232 and the voice coil assembly 22; and / or a plurality of second concave-convex structures 2311 are arranged on the surface of the outer fixed part 231 connected with the shell 1, so that the area of the plurality of second concave-convex structures 2311 distributed at intervals forms the second laser engraved part 2312, thereby realizing the adhesive connection between the second laser engraved part 2312 and the shell 1, so that the second laser engraved part 2312 formed by the plurality of second concave-convex structures 2311 increases the roughness of the surface of the outer fixed part 231 connected with the shell 1, increases the contact area between the centering support 23 and the shell 1, so that the adhesive force between the centering support 23 and the shell 1 can be effectively increased, avoiding the adhesive failure between the outer fixed part 231 and the shell 1. Therefore, by the above arrangement, the adhesive force between the centering support 23 and the voice coil 221 and / or the shell 1 can be increased, preventing the wire breakage, and ensuring the centering effect and the electrical connection effect of the centering support 23.

[0038] In an embodiment, the voice coil assembly 22 comprises a voice coil 221, one end of the voice coil 221 is connected with the diaphragm assembly 21, and the other end of the voice coil 221 is adhesively connected with the first laser engraved part 2322.

[0039] In the present embodiment, when the voice coil assembly 22 is the voice coil 221, one end of the voice coil 221 is connected with the diaphragm assembly 21, and the other end of the voice coil 221 is connected with the inner fixed part 232 of the centering support 23, at this time the voice coil 221 is adhesively connected with the first laser engraved part 2322 of the inner fixed part 232.

[0040] It can be understood that the inner fixing part 232 of the centering sheet 23 is processed by laser engraving, and a first engraving part 2322 formed by a plurality of first concave-convex structures 2321 is formed on the surface of the inner fixing part 232 connected with the voice coil 221, so as to increase the surface roughness of the bonding part of the inner fixing part 232 of the centering sheet 23, increase the bonding area, and improve the surface energy of the inner fixing part 232. In this way, the bonding force between the inner fixing part 232 of the centering sheet 23 and the voice coil 221 can be improved, which ensures the reliability of the product, guarantees the yield and reliability margin, and thus improves the competitiveness of the product.

[0041] In another embodiment, the voice coil assembly 22 includes the voice coil 221 and the skeleton 222, the skeleton 222 includes a main body part 2221 and a connecting leg 2222 arranged on the main body part 2221, the main body part 2221 includes oppositely arranged first and second surfaces, the first surface is connected with the diaphragm assembly 21, and the second surface is connected with the side of the voice coil 221 close to the diaphragm assembly 21. One end of the connecting leg 2222 is connected with the main body part 2221, and the other end of the connecting leg 2222 is bent and extended towards the side close to the centering sheet 23. The first engraving part 2322 is adhesively connected with the end of the connecting leg 2222 away from the main body part 2221.

[0042] In the present embodiment, as shown in Figures 1 to 4 The voice coil assembly 22 is arranged in the structure of the voice coil 221 and the skeleton 222, the skeleton 222 is used to connect the voice coil 221 with the diaphragm assembly 21, and the skeleton 222 is used to guide the lead wire of the voice coil 221 to the centering sheet 23, and the skeleton 222 is connected with the inner fixing part 232 of the centering sheet 23, so that the centering sheet 23 plays a centering role on the vibration of the skeleton 222 and the voice coil 221.

[0043] It can be understood that the inner fixing part 232 of the centering sheet 23 is processed by laser engraving, and a first engraving part 2322 formed by a plurality of first concave-convex structures 2321 is formed on the surface of the inner fixing part 232 connected with the voice coil 221, so as to increase the surface roughness of the bonding part of the inner fixing part 232 of the centering sheet 23, increase the bonding area, and improve the surface energy of the inner fixing part 232. In this way, the bonding force between the inner fixing part 232 of the centering sheet 23 and the voice coil 221 can be improved, which ensures the reliability of the product, guarantees the yield and reliability margin, and thus improves the competitiveness of the product.

[0044] In the embodiment, the skeleton 222 is provided with the main body 2221 and the connecting leg 2222 arranged on the main body 2221, the first surface of the main body 2221 is connected with the diaphragm assembly 21, and the second surface of the main body 2221 is connected with the side of the voice coil 221 close to the diaphragm assembly 21, so that the connecting area with the diaphragm assembly 21 and the voice coil 221 is increased by the main body 2221 of the skeleton 222, and the connection stability is effectively improved.

[0045] It can be understood that one end of the connecting leg 2222 of the skeleton 222 is connected with the main body 2221, and the other end of the connecting leg 2222 is bent and extended towards the side close to the centering support sheet 23, so that the connecting leg 2222 of the skeleton 222 can guide and guide the lead of the voice coil 221, avoid the risk of lead breakage of the voice coil 221 in the vibration process, and at the same time, the end of the connecting leg 2222 away from the main body 2221 is connected with the inner fixing part 232 of the centering support sheet 23, so that the first laser-engraved part 2322 of the inner fixing part 232 is adhesively connected with the connecting leg 2222, so as to improve the bonding force between the inner fixing part 232 of the centering support sheet 23 and the skeleton 222.

[0046] In an embodiment, as shown in Figure 2 , Figures 4 to 7 , Figure 9 , the inner fixing part 232 is provided with a plurality of first concave-convex structures 2321 to form the first laser-engraved part 2322 on the connecting surface of the inner fixing part 232.

[0047] In an embodiment, as shown in Figure 5 and Figure 9 , the first concave-convex structure 2321 can be a circular groove structure, and a plurality of circular groove structures are arranged in an array to form a first laser-engraved part 2322 in the region where the plurality of circular groove structures are arranged in an array.

[0048] In another embodiment, as shown in Figure 6 , the first concave-convex structure 2321 can be a long strip-shaped groove structure, and a plurality of long strip-shaped groove structures are arranged in a spaced and parallel manner to form a first laser-engraved part 2322 in the region where the plurality of long strip-shaped groove structures are arranged in a spaced and parallel manner.

[0049] In yet another embodiment, as shown in Figure 7 , the first concave-convex structure 2321 can be a plurality of long strip-shaped groove structures arranged in a cross manner. It can be understood that the plurality of first concave-convex structures 2321 are formed as a plurality of long strip-shaped groove structures arranged in a cross manner, that is, the plurality of long strip-shaped groove structures arranged in a cross manner form a plurality of cross-shaped groove structures arranged in an array, so that the region forms a first laser-engraved part 2322.

[0050] In order to ensure that the inner fixing portion 232 of the centering support sheet 23 has good adhesion with the voice coil assembly 22, in an embodiment, the inner fixing portion 232 is formed with a first laser-engraved portion 2322, the bonding area of the inner fixing portion 232 is defined as S, and the area of the first laser-engraved portion 2322 is defined as S1; wherein S1 / S≥1 / 3.

[0051] It can be understood that the connecting surface of the inner fixing portion 232 is the surface connected with the voice coil assembly 22, the area of the connecting surface of the inner fixing portion 232 is greater than or equal to the bonding area of the inner fixing portion 232, and the bonding area S of the inner fixing portion 232 is the area occupied by the connection and gluing of the voice coil assembly 22 on the connecting surface of the inner fixing portion 232. The area S1 of the first laser-engraved portion 2322 is the area occupied by the region in which the plurality of first concave-convex structures 2321 are distributed.

[0052] In the present embodiment, by setting the ratio of the area S1 of the first laser-engraved portion 2322 to the bonding area S of the inner fixing portion 232 to be greater than or equal to 1 / 3, the surface roughness of the connecting surface of the inner fixing portion 232 of the centering support sheet 23 can be effectively ensured, the bonding area is increased, the surface energy of the inner fixing portion 232 is improved, and thus the adhesion between the inner fixing portion 232 of the centering support sheet 23 and the voice coil assembly 22 is improved. This ensures the reliability of the product, guarantees the yield and reliability margin, and thus improves the competitiveness of the product. Alternatively, S1 / S can be 1 / 3, 2 / 5, 1 / 2, 2 / 3, etc., which is not limited herein.

[0053] In an embodiment, as shown in Figure 8 and Figure 9 The outer fixing portion 231 is provided with a plurality of second concave-convex structures 2311 to form a second laser-engraved portion 2312 on the connecting surface of the outer fixing portion 231.

[0054] In an embodiment, as shown in Figure 8 and Figure 9 The second concave-convex structure 2311 can be a circular groove structure, and the plurality of circular groove structures are arranged in an array, so that the region in which the plurality of circular groove structures are arranged in an array forms the second laser-engraved portion 2312.

[0055] In another embodiment, the second concave-convex structure 2311 can be a long strip-shaped groove structure, and the plurality of long strip-shaped groove structures are arranged in a spaced and parallel manner, so that the region in which the plurality of long strip-shaped groove structures are arranged in a spaced and parallel manner forms the second laser-engraved portion 2312.

[0056] In yet another embodiment, the second concave-convex structure 2311 can be a plurality of long strip-shaped groove structures arranged in a cross manner. It can be understood that the plurality of second concave-convex structures 2311 are formed as a plurality of long strip-shaped groove structures arranged in a cross manner, i.e., the plurality of long strip-shaped groove structures arranged in a cross manner form a plurality of cross-shaped groove structures arranged in an array, so that the area forms the second laser-engraved portion 2312.

[0057] In order to ensure that the outer fixing portion 231 of the centering support sheet 23 has good adhesion, in an embodiment, the outer fixing portion 231 is formed with a second laser-engraved portion 2312, the bonding area of the outer fixing portion 231 is defined as D, and the area of the second laser-engraved portion 2312 is defined as S2; wherein S2 / D≥1 / 3.

[0058] It can be understood that the connecting surface of the outer fixing portion 231 is the surface connected with the shell 1, the area of the connecting surface of the outer fixing portion 231 is greater than or equal to the bonding area of the outer fixing portion 231, and the bonding area D of the outer fixing portion 231 is the area occupied by the connection and glue coating of the connecting surface of the outer fixing portion 231. The area S2 of the second laser-engraved portion 2312 is the area occupied by the region in which the plurality of second concave-convex structures 2311 are distributed in the outer fixing portion 231.

[0059] In the present embodiment, by setting the ratio of the area S2 of the second laser-engraved portion 2312 to the bonding area D of the outer fixing portion 231 to be greater than or equal to 1 / 3, the surface roughness of the connecting surface of the outer fixing portion 231 of the centering support sheet 23 can be effectively ensured, the bonding area is increased, the surface energy of the outer fixing portion 231 is improved, and thus the adhesion between the outer fixing portion 231 of the centering support sheet 23 and the shell 1 is improved. This ensures the reliability of the product, guarantees the yield and reliability margin, and thus improves the competitiveness of the product. Alternatively, S2 / D can be 1 / 3, 2 / 5, 1 / 2, 2 / 3, etc., which is not limited herein.

[0060] In an embodiment, the outer fixing portion 231 is provided with the second laser-engraved portion 2312, the outer fixing portion 231 is formed in an L shape, the outer fixing portion 231 includes a first fixing end 2313 and a second fixing end 2314 connected in sequence, the two ends of the first fixing end 2313 are respectively connected with the elastic portion 233 and the second fixing end 2314, and the second laser-engraved portion 2312 is arranged on the first fixing end 2313.

[0061] In the present embodiment, as shown in FIG. 9, the outer fixing portion 231 of the centering support sheet 23 is provided with a plurality of second concave-convex structures 2311, and the second laser-engraved portion 2312 is arranged on the outer fixing portion 231. Figure 1 , Figures 5 to 9As shown, by setting the outer fixing portion 231 as an L shape, that is, the outer fixing portion 231 includes a first fixing end 2313 and a second fixing end 2314 connected in sequence, and the two ends of the first fixing end 2313 of the outer fixing portion 231 are connected with the elastic portion 233 and the second fixing end 2314 respectively. It can be understood that since the first fixing end 2313 is connected with the elastic portion 233, when the centering support sheet 23 vibrates, the pulling force on the first fixing end 2313 is relatively large. By setting the second laser-engraved portion 2312 on the first fixing end 2313, the adhesion between the first fixing end 2313 and the shell 1 can be increased, thereby preventing the pulling force of the elastic portion 233 from separating the centering support sheet 23 from the shell 1, and ensuring the working reliability of the centering support sheet 23.

[0062] Optionally, the first fixing end 2313 of the outer fixing portion 231 is provided with a second laser-engraved portion 2312, that is, the surface of the first fixing end 2313 connected with the shell 1 is provided with a plurality of second concave-convex structures 2311 distributed at intervals, which is not limited here.

[0063] Further, the second laser-engraved portion 2312 can also be formed as an L shape, that is, the second laser-engraved portion 2312 includes a first part located at the first fixing end 2313 and a second part located at the second fixing end 2314, thereby further improving the adhesion strength between the centering support sheet 23 and the shell 1. That is, the first fixing end 2313 and the second fixing end 2314 of the outer fixing portion 231 are both provided with the second laser-engraved portion 2312, which is not limited here.

[0064] Optionally, as shown, Figure 9 The inner fixing portion 232 of the centering support sheet 23 is provided with a plurality of first concave-convex structures 2321 to form a first laser-engraved portion 2322 on the connecting surface of the inner fixing portion 232, and the outer fixing portion 231 is provided with a plurality of second concave-convex structures 2311 to form a second laser-engraved portion 2312 on the connecting surface of the outer fixing portion 231. It can be understood that the shape structure of the first concave-convex structure 2321 of the inner fixing portion 232 and the shape structure of the second concave-convex structure 2311 of the outer fixing portion 231 can be the same or different, which is not limited here.

[0065] In order to ensure the adhesion between the inner fixing portion 232 of the centering support sheet 23 and the voice coil assembly 22, optionally, the adhesion between the first laser-engraved portion 2322 and the voice coil assembly 22 is not less than 2.5N.

[0066] It can be understood that the adhesion between the second laser-engraved portion 2312 and the shell 1 is not less than 2.5N. In this way, the adhesion between the outer fixing portion 231 of the centering support sheet 23 and the shell 1 can be ensured.

[0067] It should be noted that the bonding force between the first laser-engraved portion 2322 on the inner fixing portion 232 of the centering sheet 23 and the voice coil assembly 22 can be tested by existing testing methods, and is not limited herein.

[0068] In the present application, in a conventional environment, the inner fixing portion 232 of the centering sheet 23 and the voice coil assembly 22 / outer fixing portion 231 and the shell 1 are respectively fixed by a test tool, the inner fixing portion 232 and the voice coil assembly 22 are bonded and connected by the first laser-engraved portion 2322 / outer fixing portion 231 and the shell 1 are bonded and connected by the second laser-engraved portion 2312, the inner fixing portion 232 and the voice coil assembly 22 / outer fixing portion 231 and the shell 1 are respectively pulled by the tool, and the pulling force is tested by a tension meter until they are separated or broken to obtain the pulling force data, so as to obtain the bonding force test data between the first laser-engraved portion 2322 and the voice coil assembly 22 / outer fixing portion 231 and the shell 1, which is not limited herein.

[0069] It should be noted that the centering sheet 23 can be used to center the voice coil assembly 22, and the lead wire of the voice coil 221 in the voice coil assembly 22 can be connected and conducted to the external circuit by using the centering sheet 23.

[0070] When the centering sheet 23 can be used to center the voice coil assembly 22 and can be used to connect and conduct the lead wire of the voice coil 221 in the voice coil assembly 22 to the external circuit, in the present embodiment, as shown in Figure 10 The centering sheet 23 includes a conductive layer 234 and a skin layer 235 arranged on at least one side of the conductive layer 234.

[0071] In the present embodiment, the inner fixing portion 232, the elastic portion 233 and the outer fixing portion 231 of the centering sheet 23 all include a conductive layer 234 and a skin layer 235 arranged on at least one side of the conductive layer 234. It can be understood that the inner fixing portion 232 of the centering sheet 23 is provided with a first laser-engraved portion 2322, and the first laser-engraved portion 2322 is arranged on the skin layer 235; or the outer fixing portion 231 of the centering sheet 23 is formed with a second laser-engraved portion 2312, and the second laser-engraved portion 2312 is arranged on the skin layer 235; or the inner fixing portion 232 of the centering sheet 23 is provided with a first laser-engraved portion 2322, and the first laser-engraved portion 2322 is arranged on the skin layer 235, and the outer fixing portion 231 of the centering sheet 23 is formed with a second laser-engraved portion 2312, and the second laser-engraved portion 2312 is arranged on the skin layer 235.

[0072] Optionally, the first laser-engraved portion 2322 is arranged on the skin layer 235, and a laser-engraving depth of the first laser-engraved portion 2322 is not more than 1 / 2 of a thickness of the skin layer 235. In this way, the surface roughness of a connecting surface of the inner fixing portion 232 can be ensured without destroying the packaging effect of the skin layer 235, the bonding area is increased, and the surface energy of the inner fixing portion 232 is improved, so that the bonding force between the inner fixing portion 232 of the centering support sheet 23 and the voice coil assembly 22 is improved, the product reliability is ensured, the yield and reliability margin are ensured, and the competitiveness of the product is improved.

[0073] Optionally, the second laser-engraved portion 2312 is arranged on the skin layer 235, and a laser-engraving depth of the second laser-engraved portion 2312 is not more than 1 / 2 of a thickness of the skin layer 235. In this way, the surface roughness of a connecting surface of the outer fixing portion 231 can be ensured without destroying the packaging effect of the skin layer 235, the bonding area is increased, and the surface energy of the outer fixing portion 231 is improved, so that the bonding force between the outer fixing portion 231 of the centering support sheet 23 and the shell 1 is improved, the product reliability is ensured, the yield and reliability margin are ensured, and the competitiveness of the product is improved.

[0074] In an embodiment, as shown in Figure 1 The sound generating device 100 further includes a magnetic circuit system 3, which includes a magnetic yoke 31, a center magnetic portion 32 arranged on the magnetic yoke 31, and a side magnetic portion 33 arranged outside the center magnetic portion 32 and spaced from the center magnetic portion 32 to form a magnetic gap 34.

[0075] In the present embodiment, the voice coil 221 of the voice coil assembly 22 is arranged corresponding to the magnetic gap 34 of the magnetic circuit system 3. It can be understood that the voice coil 221 is optionally in the form of a ring-shaped track, one end of the voice coil 221 is connected to the diaphragm assembly 21, and the other end of the voice coil 221 is suspended in the magnetic gap 34. Alternatively, the other end of the voice coil 221 can be arranged above the magnetic gap 34 and opposite to the magnetic gap 34. In this way, when current is passed through the voice coil 221, the voice coil 221 can vibrate in the magnetic gap 34 of the magnetic circuit system 3 to drive the diaphragm assembly 21 to vibrate and generate sound.

[0076] It can be understood that, as shown in Figure 1 The diaphragm assembly 21 includes a diaphragm 211 and a dome 212 connected to the diaphragm 211. An outer periphery of the diaphragm 211 is connected to one end of the shell 1, and one end of the voice coil 221 is connected to the dome 212 or connected to the dome 212 through the former 222, which is not limited.

[0077] In the present embodiment, as shown in Figure 2As shown, the center magnetic part 32 comprises a center magnet 321 and a center magnetic plate 322 which are stacked, and the center magnet 321 is connected to the magnetic yoke 31. The edge magnetic part 33 comprises an edge magnet 331 and an edge magnetic plate 332 which are stacked, and the edge magnet 331 is connected to the magnetic yoke 31. It can be understood that the edge magnet 331 and the edge magnetic plate 332 are located outside the center magnet 321 and the center magnetic plate 322 and are spaced from the center magnet 321 and the center magnetic plate 322 to form a magnetic gap 34.

[0078] It can be understood that the magnetic circuit system 3 is connected to the shell 1 away from the diaphragm assembly 21 through the edge magnetic part 33. The edge magnetic part 33 of the magnetic circuit system 3 and the shell 1 form a clearance space for providing installation and vibration space for the centering support 23. Optionally, as shown in the figure, Figure 1 As shown, the edge magnetic part 33 is provided with a clearance space corresponding to the corner of the shell 1 (i.e. the corner position), which is not limited here.

[0079] It should be noted that the specific structure of the magnetic circuit system 3, the connection mode of the magnetic circuit system 3 and the shell 1, and the setting position relationship of the centering support 23 and the magnetic circuit system 3, etc. can refer to the prior art, which is not limited here.

[0080] The sound generating device 100 of the present application can set the first laser etching part 2322 / second laser etching part 2312 on the inner fixed part 232 / outer fixed part 231 of the centering support 23 by laser etching at the connection position of the centering support 23, the voice coil assembly 22 and the shell 1, thereby improving the adhesion of the centering support 23 and the voice coil assembly 22 / the shell 1, improving the reliability margin of the product and the service life of the product, and reducing product failure. At the same time, only the centering support 23 needs to be processed by laser etching, which is efficient, fast and easy to operate, and does not involve the modification of other materials, has low modification cost and high popularization; and with the improvement of adhesion, the adhesion area can be appropriately reduced, space is saved for other components, and the design margin of the product is increased.

[0081] The present application also provides an electronic device comprising the sound generating device 100 described above. The specific structure of the sound generating device 100 is referred to the foregoing embodiments, and since the electronic device adopts all the technical solutions of the foregoing embodiments, it at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be repeated here.

[0082] Optionally, the electronic device of the present application can be a mobile phone, a tablet computer or other portable mobile electronic product, a watch, a VR, an AR or other wearable device, etc., which is not limited here.

[0083] The above merely describes optional embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made under the concept of the present application, or direct / indirect application in other related technical fields using the content of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A sound-generating device, characterized in that, The sound-generating device includes: shell; and A vibration system is disposed in the housing. The vibration system includes a diaphragm assembly, a voice coil assembly, and a centering support. One end of the voice coil assembly is connected to the diaphragm assembly. The centering support includes an outer fixing part, an inner fixing part, and an elastic part. The two ends of the elastic part are respectively connected to the inner fixing part and the outer fixing part. The outer fixing part is connected to the housing. The inner fixing part is connected to the end of the voice coil assembly away from the diaphragm assembly. The inner fixing part has a plurality of first concave-convex structures on the surface where it connects to the voice coil assembly. The area formed by the plurality of first concave-convex structures is spaced apart and is a first laser-engraved part. The first laser-engraved part is bonded to the voice coil assembly. Alternatively, the outer fixing part has a plurality of second concave-convex structures on the surface where it connects to the housing. The area formed by the plurality of second concave-convex structures is spaced apart and is a second laser-engraved part. The second laser-engraved part is bonded to the housing.

2. The sound-generating device as described in claim 1, characterized in that, The voice coil assembly includes a voice coil and a frame. The frame includes a main body and a connecting foot disposed on the main body. The main body includes a first surface and a second surface disposed opposite to each other. The first surface is connected to the diaphragm assembly, and the second surface is connected to the side of the voice coil near the diaphragm assembly. One end of the connecting foot is connected to the main body, and the other end of the connecting foot is bent and extended toward the side near the centering support. The first laser-engraved part is bonded to the end of the connecting foot away from the main body.

3. The sound-generating device as described in claim 1, characterized in that, The voice coil assembly includes a voice coil, one end of which is connected to the diaphragm assembly, and the other end of which is bonded to the first laser-engraved portion.

4. The sound-generating device as described in claim 1, characterized in that, The internal fixing part is provided with a plurality of the first concave-convex structures; wherein, the first concave-convex structure is a circular groove structure, and the plurality of the circular groove structures are arranged in an array; or, the first concave-convex structure is a long strip groove structure, and the plurality of the long strip groove structures are arranged at intervals and in parallel; or, the first concave-convex structure is a plurality of long strip groove structures arranged in a cross pattern. And / or, the external fixing part is provided with a plurality of the second concave-convex structures; wherein, the second concave-convex structure is a circular groove structure, and the plurality of circular groove structures are arranged in an array; or, the second concave-convex structure is a long strip groove structure, and the plurality of long strip groove structures are arranged at intervals and in parallel; or, the second concave-convex structure is a plurality of long strip groove structures arranged in a cross pattern.

5. The sound-generating device as described in claim 1, characterized in that, The internal fixation part is formed with the first laser engraving part, the bonding area of ​​the internal fixation part is defined as S, and the area of ​​the first laser engraving part is defined as S1; Where S1 / S≥1 / 3.

6. The sound-generating device as claimed in claim 1, characterized in that, The external fixing part is formed with the second laser engraving part, the bonding area of ​​the external fixing part is defined as D, and the area of ​​the second laser engraving part is defined as S2; Wherein, S2 / D≥1 / 3.

7. The sound-generating device as claimed in claim 1, characterized in that, The centering support includes a conductive layer and a skin layer disposed on at least one side of the conductive layer; The internal fixation part has a first laser-engraved part, which is disposed on the epidermal layer, and the laser engraving depth of the first laser-engraved part does not exceed 1 / 2 of the thickness of the epidermal layer; and / or, the external fixation part has a second laser-engraved part, which is disposed on the epidermal layer, and the laser engraving depth of the second laser-engraved part does not exceed 1 / 2 of the thickness of the epidermal layer.

8. The sound-generating device as claimed in claim 1, characterized in that, The external fixing part is provided with a second laser engraving part. The external fixing part is formed in an L shape. The external fixing part includes a first fixing end and a second fixing end connected in sequence. The two ends of the first fixing end are respectively connected to the elastic part and the second fixing end. The second laser engraving part is provided on the first fixing end.

9. The sound-generating device as described in any one of claims 1 to 8, characterized in that, The adhesive force between the first laser-engraved part and the voice coil assembly is not less than 2.5N; And / or, the adhesive force between the second laser-engraved part and the housing is not less than 2.5N.

10. An electronic device, characterized in that, The electronic device includes a sound-generating device as described in any one of claims 1 to 9.

Images