Double-sided sound production device and electronic equipment

Abstract

The utility model belongs to the technical field of electro-acoustic conversion, and provides a double-sided sound production device and electronic equipment, and the double-sided sound production device comprises a housing assembly, a magnetic circuit system, a first vibration system and a second vibration system. The first vibration system comprises a first diaphragm assembly, a first centering disk and a first voice coil, the first voice coil is provided with a first side and a second side which are oppositely arranged, a lead of the first voice coil is located on the first side, the first centering disk comprises a plurality of disk structures arranged on the first side and the second side, the disk structure located on the first side comprises a first copper foil layer, and the disk structure located on the second side comprises a second copper foil layer; the support chip structure on the second side is composed of a first base material layer; the second vibration system comprises a second vibrating diaphragm assembly, a second centering disk and a second voice coil. The second centering disk is located between the second vibrating diaphragm assembly and the second voice coil. According to the double-sided sounding device provided by the utility model, the support chip structure which is not electrically connected with the first voice coil lead is designed into a structure without a copper foil layer, so that the production cost of the first centering support chip is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic conversion, in particular to a double-sided sound-generating device and electronic equipment. Background Art

[0002] With the expansion of the consumer electronics market, consumer electronics products such as mobile phones and laptops have been widely used. As an important acoustic component in consumer electronics products, the performance of speakers has attracted more and more attention.

[0003] In order to make electronic products (such as mobile phones) have a better stereo effect when in external speaker mode and a better privacy protection effect when in handset call mode, the speaker is usually designed as a double-sided sound-emitting structure, so as to emit two sound waves with the same phase for superposition and enhancement to improve the stereo effect when the speaker is in external speaker mode, or to emit two sound waves with opposite phases based on the acoustic dipole effect for offset attenuation to improve the privacy protection effect when in handset call mode.

[0004] At present, the vibration system of most loudspeakers adopts a centering support structure, which can play a role in both conducting electricity and suppressing polarization. However, the current centering support, whether it is a support structure electrically connected to the voice coil lead or a support structure that is not electrically connected to the voice coil lead and only plays a role in supporting the vibration of the voice coil, all adopt a structural design including a copper foil layer. Although the symmetric design of both sides of the vibration system is ensured, the polarization of the loudspeaker caused by asymmetry is reduced, and the product demand for an amplitude greater than 0.3 mm is met, the production cost of the above design is relatively high, thereby increasing the manufacturing cost of the product. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the inventors conducted in-depth research and completed the present utility model after paying a lot of creative work.

[0006] Specifically, the technical problem to be solved by the utility model is to provide a double-sided sound-emitting device and an electronic device to solve the technical problem of high production cost of the centering support piece of the current loudspeaker vibration system.

[0007] In order to solve the above technical problems, the technical solution of the utility model is:

[0008] A double-sided sound-generating device comprises a housing assembly, a magnetic circuit system, a first vibration system and a second vibration system, wherein the first vibration system and the second vibration system are respectively arranged on opposite sides of the magnetic circuit system;

[0009] The first vibration system includes a first diaphragm assembly, a first centering support and a first voice coil, one end of the first voice coil is connected to the first diaphragm assembly, the first voice coil has a first side and a second side that are oppositely arranged, the lead of the first voice coil is located on the first side, the first centering support includes a plurality of support structures arranged on the first side and the second side, the support structure located on the first side includes a first copper foil layer and a first inner pad electrically connected to the first copper foil layer, the lead of the first voice coil is electrically connected to the first inner pad, and the support structure located on the second side is composed of a first substrate layer, and the first substrate layer is made of a non-conductive material;

[0010] The second vibration system includes a second diaphragm assembly, a second centering support, and a second voice coil. One end of the second voice coil is connected to the second diaphragm assembly, and the second centering support is located between the second diaphragm assembly and the second voice coil.

[0011] According to some embodiments of the present invention, the first centering support sheet includes two support sheet structures that are opposite and spaced apart, and the two support sheet structures include a first support sheet structure located on the first side and a second support sheet structure located on the second side, wherein:

[0012] The first support sheet structure includes the first substrate layer and the first copper foil layer which are stacked, and the first copper foil layer of the first support sheet structure forms two independent conductive lines;

[0013] The second support sheet structure includes at least two first substrate layers, and the first substrate layers are PI material layers.

[0014] According to some embodiments of the present invention, the first centering support sheet includes four support sheet structures distributed in an array, wherein two of the support sheet structures are formed as first support sheet structures located on the first side, and the other two of the support sheet structures are formed as second support sheet structures located on the second side, wherein:

[0015] The first support sheet structure comprises the first substrate layer and the first copper foil layer which are stacked, and the first copper foil layer of each of the first support sheet structures forms a conductive circuit;

[0016] The second support sheet structure includes at least two first substrate layers, and the first substrate layers are PI material layers.

[0017] According to some embodiments of the utility model, the first centering support plate includes a connecting portion and an inner fixing portion and an outer fixing portion arranged on both sides of the connecting portion, the inner fixing portion is connected to the first voice coil, the outer fixing portion is connected to the shell assembly, the width of the connecting portion of the second support plate structure is 0.1mm~0.4mm, and / or the thickness of the connecting portion of the second support plate structure is 0.035mm~0.15mm.

[0018] According to some embodiments of the utility model, the second centering support plate includes an annular outer fixing portion, an inner fixing portion arranged on the circumferential inner side of the outer fixing portion, and a connecting portion arranged between the outer fixing portion and the inner fixing portion, wherein the connecting portions are multiple and respectively connect the outer fixing portion and the inner fixing portion;

[0019] The second voice coil includes a first side and a second side that are arranged opposite to each other in pairs, the plurality of connecting parts include a first connecting part located on the first side and a second connecting part located on the second side, the first connecting part includes a second copper foil layer, the inner fixing part includes a second inner solder pad electrically connected to the second copper foil layer, the second inner solder pad is electrically connected to the lead of the second voice coil, and the second connecting part is composed of a second substrate layer, and the second substrate layer is made of a non-conductive material.

[0020] According to some embodiments of the present invention, the second substrate layer includes at least two layers, and / or the second substrate layer is a PI material layer.

[0021] According to some embodiments of the present invention, the second centering support comprises an annular outer fixing portion, an inner fixing portion arranged on the inner side of the outer fixing portion in the circumferential direction, and a connecting portion arranged between the outer fixing portion and the inner fixing portion, wherein the connecting portions are multiple and respectively connect the outer fixing portion and the inner fixing portion; wherein,

[0022] There are two connecting parts and they are arranged on opposite sides of the second voice coil, each of the connecting parts includes a second copper foil layer, and the inner fixing part includes a second inner pad electrically connected to the second copper foil layer, and the second inner pad is electrically connected to the lead of the second voice coil.

[0023] According to some embodiments of the utility model, the shell assembly includes a first shell and a second shell arranged opposite to each other, the first centering support plate also includes a first external solder pad electrically connected to the first copper foil layer, the first external solder pad is fixed to the second shell and exposed to form a first external terminal, the second centering support plate also includes a second external solder pad electrically connected to the second copper foil layer, the second external solder pad is arranged in the second shell, a conductive member is also arranged in the second shell, one end of the conductive member is electrically connected to the second external solder pad, the other end of the conductive member is exposed in the second shell to form a second external terminal, and the first external terminal and the second external terminal are both electrically connected to an external circuit.

[0024] According to some embodiments of the present invention, the second diaphragm assembly includes a second fold ring, and the second fold ring is recessed in a direction away from the second centering support piece;

[0025] The first diaphragm assembly includes a first fold ring, and the concave direction of the first fold ring is the same as the concave direction of the second fold ring.

[0026] The utility model also discloses an electronic device, comprising the double-sided sound-emitting device of the above embodiment of the utility model.

[0027] After adopting the above technical solution, the beneficial effects of the utility model are:

[0028] In the double-sided sound-emitting device, the first vibration system and the second vibration system share the same magnetic circuit system, which can improve the utilization rate of the magnetic field and reduce the volume of the double-sided sound-emitting device. The two vibration systems are relatively independent and can achieve independent vibration, so as to emit two sound waves with the same phase for superposition and enhancement to improve the stereo effect of the product in the external speaker mode, or emit two sound waves with opposite phases based on the acoustic dipole effect for offset and attenuation to improve the privacy protection effect in the handset call mode. The first centering support plate of the first vibration system includes a plurality of support plate structures. Since the support plate structure located on the second side of the first voice coil does not participate in the conduction and has no reliability risk, the support plate structure located on the first side of the first voice coil includes a first copper foil layer to achieve conductive connection with the first voice coil lead. The support plate structure located on the second side of the first voice coil is composed of a first substrate layer made of a non-conductive material. Therefore, the support plate structure that is not electrically connected to the first voice coil lead is designed as a structure without a copper foil layer, which ensures performance and reliability while greatly reducing the production cost of the first centering support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 This is a schematic diagram of the three-dimensional structure of a double-sided sound-emitting device according to an embodiment of the utility model;

[0031] Figure 2 Another three-dimensional structural schematic diagram of a double-sided sound-emitting device according to an embodiment of the utility model;

[0032] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure in the AA direction;

[0033] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0034] Figure 5 This is a schematic diagram of the explosion structure of a double-sided sound-emitting device according to an embodiment of the utility model;

[0035] Figure 6 This is a schematic structural diagram of a first semi-finished product of an embodiment of the utility model;

[0036] Figure 7 This is a schematic structural diagram of a second semi-finished product of an embodiment of the utility model;

[0037] Figure 8 This is a schematic diagram of the explosion structure of the first vibration system of one embodiment of the utility model;

[0038] Fig. 9 It is a schematic cross-sectional structural diagram of a first centering support piece according to an embodiment of the utility model;

[0039] Fig.10 This is a structural schematic diagram of a first centering support piece in another embodiment of the utility model;

[0040] Fig.11 It is a schematic cross-sectional structural diagram of a first centering support piece of another embodiment of the utility model;

[0041] Fig.12 It is a schematic diagram of the explosion structure of the second vibration system of one embodiment of the utility model;

[0042] Fig.13 It is a schematic cross-sectional structural diagram of the second centering support piece of the first embodiment of the utility model;

[0043] Fig.14 It is a schematic cross-sectional structural diagram of the second centering support piece of the second embodiment of the utility model;

[0044] Fig.15 This is a schematic structural diagram of a second centering support piece according to a third embodiment of the present utility model;

[0045] Fig.16 It is a schematic cross-sectional structural diagram of the second centering support piece of the third embodiment of the utility model;

[0046] Fig.17 This is a schematic structural diagram of the second centering support piece of the fourth embodiment of the utility model;

[0047] Fig.18 It is a schematic cross-sectional structural diagram of the second centering support piece of the fourth embodiment of the utility model;

[0048] Fig.19 This is a schematic structural diagram of a second housing according to an embodiment of the utility model;

[0049] Fig. 20 for Fig.19 Schematic diagram of the cross-sectional structure in the CC direction;

[0050] Reference numerals:

[0051] 100-Double-sided sound device;

[0052] 10-housing assembly; 11-first housing; 12-second housing; 13-conductive member; 131-second external terminal;

[0053] 20-magnetic circuit system; 21-magnetic yoke; 211-body; 212-bending portion; 2121-first extension portion; 2122-second extension portion; 22-magnetic circuit assembly; 221-center magnet; 222-center magnetic plate; 223-side magnet; 224-side magnetic plate;

[0054] 30-first vibration system; 31-first diaphragm assembly; 311-first diaphragm; 3111-first external connection part; 3112-first folding ring; 3113-first internal connection part; 312-first vibration plate; 32-first centering support piece; 32a-first support piece structure; 32b-second support piece structure; 321-first copper foil layer; 322-first substrate layer; 323-inner fixing part; 324-connecting part; 325-external fixing part; 326-first inner solder pad; 327-first outer solder pad; 328-first external terminal; 33-first voice coil; 33a-first side; 33b-second side;

[0055] 40-second vibration system; 41-second diaphragm assembly; 411-second diaphragm; 4111-second external connection portion; 4112-second folding ring; 4113-second internal connection portion; 412-second vibration plate; 42-second centering support; 421-inner fixing portion; 422-connecting portion; 422a-first connecting portion; 422b-second connecting portion; 423-external fixing portion; 424-second copper foil layer; 425-second substrate layer; 426-second inner solder pad; 427-second outer solder pad; 43-second voice coil; 43a-first side; 43b-second side;

[0056] 50-front cover;

[0057] 60-Dust screen. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0059] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0060] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0061] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0062] like Figures 1 to 7As shown together, the double-sided sound-emitting device 100 according to an embodiment of the utility model includes a shell assembly 10, a magnetic circuit system 20, a first vibration system 30 and a second vibration system 40, the magnetic circuit system 20 is connected to the shell assembly 10, the magnetic circuit system 20 is provided with a first magnetic gap and a second magnetic gap, and the first vibration system 30 and the second vibration system 40 are respectively arranged on opposite sides of the magnetic circuit system 20.

[0063] The first vibration system 30 and the second vibration system 40 share the same magnetic circuit system 20, which can improve the utilization rate of the magnetic field and reduce the volume of the double-sided sound-emitting device 100. The first vibration system 30 and the second vibration system 40 are relatively independent and can independently control vibration, so as to emit two sound waves with the same phase for superposition and enhancement to improve the stereo effect of the product in the external speaker mode, or emit two sound waves with opposite phases based on the acoustic dipole effect to offset and attenuate to improve the privacy protection effect in the handset call mode.

[0064] like Figures 3 to 5 , Figures 8 to 11 As shown, the first vibration system 30 includes a first diaphragm assembly 31, a first centering support 32 and a first voice coil 33. The outer periphery of the first diaphragm assembly 31 is fixed to the housing assembly 10. One end of the first voice coil 33 is connected to the first diaphragm assembly 31. The other end of the first voice coil 33 is inserted into the first magnetic gap. The first voice coil 33 has a first side 33a and a second side 33b that are arranged opposite to each other. The lead of the first voice coil 33 is located on the first side 33a. The first centering support 32 includes a plurality of support structures arranged on the first side 33a and the second side 33b. The support structure located on the first side 33a includes a first copper foil layer 321 and a first inner pad 326 electrically connected to the first copper foil layer 321. The lead of the first voice coil 33 is electrically connected to the first inner pad 326. The support structure located on the second side 33b is composed of a first substrate layer 322, and the first substrate layer 322 is made of a non-conductive material. For example, the first substrate layer 322 can be a PI material layer.

[0065] It can be understood that since the lead of the first voice coil 33 is located on the first side 33a, it is only necessary to electrically connect the support structure located on the first side 33a to the lead of the first voice coil 33, so that the support structure located on the second side 33b can be set to a structural design without a copper foil layer, thereby greatly reducing the manufacturing cost of the first centering support 32.

[0066] like Figures 3 to 5 , Figures 12 to 18As shown, the second vibration system 40 includes a second diaphragm assembly 41, a second centering support 42 and a second voice coil 43. The outer periphery of the second diaphragm assembly 41 is fixed to the housing assembly 10, one end of the second voice coil 43 is connected to the second diaphragm assembly 41, the other end of the second voice coil 43 is inserted in the second magnetic gap, and the second centering support 42 is located between the second diaphragm assembly 41 and the second voice coil 43. Specifically, the second centering support 42 is connected to the housing assembly 10, the second voice coil 43 is located on the side of the second centering support 42 facing the magnetic circuit system 20, and one end of the second voice coil 43 is connected to the second centering support 42, the second diaphragm assembly 41 is located on the side of the second centering support 42 away from the magnetic circuit system 20, and the second diaphragm assembly 41 is connected to the second centering support 42.

[0067] According to the double-sided sound-emitting device 100 of the utility model, the first centering support plate 32 of the first vibration system 30 includes a plurality of support plate structures. The support plate structure located on the first side 33a of the first voice coil 33 includes a first copper foil layer 321 to achieve conductive connection with the lead of the first voice coil 33. Since the support plate structure located on the second side 33b of the first voice coil 33 does not participate in conductive conduction, there is no problem of conductive temperature rise affecting its service life, and the conductive connection between the external circuit and the first voice coil 33 will not be affected. The support plate structure located on the second side 33b of the first voice coil 33 is composed of a first substrate layer 322, and the first substrate layer 322 is made of a non-conductive material. Therefore, the support plate structure that is not electrically connected to the lead of the first voice coil 33 is designed to be a structure without a copper foil layer, which ensures performance and reliability while greatly reducing the production cost of the first centering support plate 32.

[0068] In some embodiments of the present invention, Figures 3 to 5 , Figure 7 As shown, the magnetic circuit system 20 includes a magnetic yoke 21 and a magnetic circuit assembly 22. The magnetic yoke 21 is fixed to the shell assembly 10. The magnetic circuit assembly 22 includes a central magnet 221, a central magnetic plate 222, a side magnet 223 and a side magnetic plate 224. The magnetic yoke 21 includes a main body 211 and a bending portion 212 connecting the main body 211 and the shell assembly 10. The central magnet 221 is arranged on the main body 211 and is arranged on a side of the main body 211 facing the second diaphragm assembly 41. The central magnetic plate 222 is located on a side of the central magnet 221 away from the main body 211 and is connected to the central magnet 221. The central magnet 221 is sandwiched between the central magnetic plate 222 and the main body 211.

[0069] In some embodiments of the present invention, Figures 3 to 5 , Figure 7As shown, the bending portion 212 includes a first extension portion 2121 and a second extension portion 2122, the two ends of the first extension portion 2121 are respectively connected to the main body portion 211 and the second extension portion 2122, the first extension portion 2121 extends relative to the main body portion 211 toward the direction close to the second diaphragm assembly 41, the second extension portion 2122 extends relative to the first extension portion 2121 toward the direction away from the center magnet 221, one end of the second extension portion 2122 is connected to the first extension portion 2121, and the other end of the second extension portion 2122 is fixed to the housing assembly 10; the side magnet 223 is provided on the second extension portion 2122, and the second extension portion 2122 is disposed toward the center magnet 221. The first diaphragm assembly 31 is arranged on one side, the side magnet 223 and the circumferential edge of the center magnet 221 are spaced apart, the side magnetic conductive plates 224 are fixed to the shell assembly 10, and are respectively located on the side of the side magnet 223 away from the second extension portion 2122, a second magnetic gap is defined between the first extension portion 2121 and the center magnet 221, one end of the second voice coil 43 is connected to the second centering support plate 42, and the other end of the second voice coil 43 is inserted in the second magnetic gap, a first magnetic gap is defined between the first extension portion 2121 and the side magnet 223, one end of the first voice coil 33 is connected to the first diaphragm assembly 31, and the other end of the first voice coil 33 is inserted in the first magnetic gap.

[0070] In a specific embodiment of the present invention, Figures 3 to 5 , Figure 7 As shown, the main body 211 , the first extension portion 2121 and the second extension portion 2122 of the magnetic yoke 21 are an integrally formed structure, which has high structural strength and is easy to manufacture and install.

[0071] In some embodiments of the present invention, Figure 8 and Fig. 9As shown, the first centering support plate 32 includes two support plate structures that are opposite and spaced apart, and the two support plate structures include a first support plate structure 32a located at a first side 33a of the first voice coil 33 and a second support plate structure 32b located at a second side 33b of the first voice coil 33. Thus, the first centering support plate 32 can be connected to the bottom or side wall of the first voice coil 33 to meet specific usage requirements. The first centering support plate 32 can prevent the first voice coil 33 from being polarized during vibration, and play a role in balancing the first vibration system 30. The first support plate structure 32a may include a first substrate layer 322 and a first copper foil layer 321 which are stacked, wherein the first substrate layer 322 is located on the surface of the first copper foil layer 321 to provide insulation protection for the first copper foil layer 321, and the first copper foil layer 321 of the first support structure 32a forms two mutually independent conductive lines to achieve electrical connection between the external circuit and the two leads of the first voice coil 33 respectively; the second support structure 32b includes at least two layers of first substrate layers 322, wherein the first substrate layers 322 are PI material layers, and the first substrate layers 322 are connected by adhesive bonding. Since the second support structure 32b located on the second side 33b of the first voice coil 33 is only used to support the vibration of the first voice coil 33, and does not participate in the conduction and has no reliability risk, the production cost of the first centering support 32 is greatly reduced by designing the first support structure 32a as a pure PI or PI composite structure without a copper foil layer.

[0072] In some embodiments of the present invention, Figure 8 , Fig.10 and Fig.11As shown, the first centering support plate 32 includes four support plate structures distributed in an array, wherein two support plate structures are formed as first support plate structures 32a located at the first side 33a of the first voice coil 33, and the other two support plate structures are formed as second support plate structures 32b located at the second side 33b of the first voice coil 33. Thus, the first centering support plate 32 can be connected to the bottom or side wall of the first voice coil 33. The two first support plate structures 32a and the two second support plate structures 32b are respectively located at the four corners of the first voice coil 33, thereby improving the centering effect of the first centering support plate 32 on the first voice coil 33, effectively reducing the polarization phenomenon of the first voice coil 33 during operation, and playing a role in balancing the first vibration system 30. The support structure 32a may include a first substrate layer 322 and a first copper foil layer 321 which are stacked, the first substrate layer 322 is located on the surface of the first copper foil layer 321 to achieve insulation protection for the first copper foil layer 321, and the first copper foil layer 321 of each first support structure 32a forms a conductive circuit, wherein the conductive circuit formed by one first support structure 32a is used to achieve electrical connection between an external circuit and one of the leads of the first voice coil 33, and the conductive circuit formed by another first support structure 32a is used to achieve electrical connection between an external circuit and another lead of the first voice coil 33; the second support structure 32b may include at least two layers of first substrate layers 322, and the first substrate layer 322 is a PI material layer. Since the second support structure 32b located on the second side 33b of the first voice coil 33 is only used to achieve vibration support for the first voice coil 33, and does not participate in conduction and has no reliability risk, the production cost of the first centering support 32 is greatly reduced by designing the second support structure 32b as a pure PI or PI composite structure without a copper foil layer.

[0073] In some embodiments of the present invention, Figures 8 to 11 As shown, the first centering support piece 32 includes a connecting portion 324 and an inner fixing portion 323 and an outer fixing portion 325 arranged on both sides of the connecting portion 324. The first centering support piece 32 can be connected to the bottom or side wall of the first voice coil 33, and the inner fixing portion 323 of the first centering support piece 32 is connected to the first voice coil 33, and the outer fixing portion 325 of the first centering support piece 32 is connected to the shell assembly 10, thereby realizing the vibration support of the first voice coil 33 by the first centering support piece 32.

[0074] In a specific embodiment of the present invention, Figures 8 to 11As shown, the width of the connecting portion 324 of the second support sheet structure 32b is 0.1mm-0.4mm, and / or the thickness of the connecting portion 324 of the second support sheet structure 32b is 0.035mm-0.15mm; by adjusting the width and thickness of the connecting portion 324 of the second support sheet structure 32b, the mass of the second support sheet structure 32b and the first support sheet structure 32a can be made symmetrical, polarization phenomenon can be avoided, and the demand for products with an amplitude greater than 0.3mm can be met.

[0075] In some embodiments of the present invention, Figure 12 to Figure 14As shown, the second centering support plate 42 includes an annular outer fixing portion 423, an inner fixing portion 421 arranged on the circumferential inner side of the outer fixing portion 423, and a connecting portion 422 is arranged between the outer fixing portion 423 and the inner fixing portion 421, and the connecting portion 422 is multiple and respectively connects the outer fixing portion 423 and the inner fixing portion 421, the inner fixing portion 421 of the second centering support plate 42 is connected to the second voice coil 43, and the outer fixing portion 423 of the second centering support plate 42 is connected to the shell assembly 10; thus, the second centering support plate 42 can be connected to one end of the second voice coil 43, and the second centering support plate 42 is located between the second voice coil 43 and the second diaphragm assembly 41, and can play a role in balancing the second vibration system 40. The second voice coil 43 includes a first side 43a and a second side 43b which are arranged opposite to each other in pairs. For example, the first side 43a may be the left and right sides of the second voice coil 43, and the first side 43a of the second voice coil 43 is respectively provided with leads. The second side 43b may be the front and rear sides of the second voice coil 43, and the second side 43b of the second voice coil 43 is not provided with leads. The plurality of connecting parts 422 include a first connecting part 422a located on the first side 43a and a second connecting part 422b located on the second side 43b. The first connecting part 422a includes a second copper foil layer 424. A second substrate layer 425 may be provided on the surface of the second copper foil layer 424. The second substrate layer 425 implements insulation protection for the second copper foil layer 424. The inner fixing part 421 includes a second inner pad 426 electrically connected to the second copper foil layer 424. The second inner pad 426 is electrically connected to the leads of the second voice coil 43. The second connecting part 422b is composed of the second substrate layer 425, and the second substrate layer 425 is made of non-conductive material. By designing the second connection part 422b as a pure PI or PI composite structure without a copper foil layer, the production cost of the second centering support 42 is greatly reduced. It can be understood that the outer fixing part 423 of the second centering support 42 can be formed into a square structure, and the connection parts 422 of the second centering support 42 can be four and respectively connected to the four connection edges of the outer fixing part 423, two of which are the first connection parts 422a located on the first side 43a of the second voice coil 43, and the other two are the second connection parts 422b located on the second side 43b of the second voice coil 43, thereby ensuring the symmetrical design of the second vibration system 40 and avoiding the polarization phenomenon caused by the asymmetry of the second centering support 42.

[0076] In some embodiments of the present invention, the second substrate layer 425 includes at least two layers, the second substrate layers 425 are connected by adhesive bonding, and / or the second substrate layer 425 is a PI material layer; the second substrate layer 425 can meet the requirements of insulation protection and vibration support, and the cost is relatively low, thereby greatly reducing the production cost of the second centering support plate 42.

[0077] In some embodiments of the present invention, Fig.12 , Figures 15 to 18As shown, the second centering support plate 42 includes an annular outer fixing portion 423, an inner fixing portion 421 arranged on the circumferential inner side of the outer fixing portion 423, and a connecting portion 422 is arranged between the outer fixing portion 423 and the inner fixing portion 421, and the connecting portion 422 is multiple and respectively connects the outer fixing portion 423 and the inner fixing portion 421, the inner fixing portion 421 of the second centering support plate 42 is connected to the second voice coil 43, and the outer fixing portion 423 of the second centering support plate 42 is connected to the shell assembly 10; thus, the second centering support plate 42 can be connected to one end of the second voice coil 43, and the second centering support plate 42 is located between the second voice coil 43 and the second diaphragm assembly 41, and can play a role in balancing the second vibration system 40. There are two connecting parts 422 of the second centering support 42 and they are arranged on opposite sides of the second voice coil 43, each connecting part 422 includes a second copper foil layer 424, and the inner fixing part 421 includes a second inner pad 426 electrically connected to the second copper foil layer 424, and the second inner pad 426 is electrically connected to the lead of the second voice coil 43. There are two connecting parts 422 of the second centering support 42 and they are arranged opposite to each other. When it can be applied in the side sound emission state, the two connecting parts 422 can be simulated according to the direction of the side sound emission to improve the polarization caused by the side sound emission. For example, when the polarization direction is swinging along the short axis direction of the second centering support 42, the two connecting parts 422 are respectively located at the two short axes of the second centering support 42, and when the polarization direction is swinging along the long axis direction of the second centering support 42, the two connecting parts 422 are respectively located at the two long axes of the second centering support 42. Optionally, the inner fixing portion 421 further includes a connecting piece formed by a second substrate layer 425 , which is connected to the connecting portion 422 to form a connecting plane, and the connecting plane is connected to the top of the second voice coil 43 , thereby facilitating assembly of the second voice coil 43 and the second centering support plate 42 .

[0078] In some embodiments of the present invention, Figures 1 to 7 , Fig.19As shown, the housing assembly 10 includes a first housing 11 and a second housing 12 that are arranged opposite to each other, the magnetic conductive plate 224 is fixed to the first housing 11 and is integrally injection molded with the first housing 11, the first diaphragm assembly 31 is fixed to the first housing 11 and is arranged on a side of the first housing 11 away from the second housing 12, the second extension portion 2122 of the magnetic conductive yoke 21 is fixed to the second housing 12 and is integrally injection molded with the second housing 12, the outer fixing portion 423 of the second centering support piece 42 is fixed to the second housing 12 and is arranged on a side of the second housing 12 away from the first housing 11; the first centering support piece 32 also includes a first external solder pad 327 electrically connected to the first copper foil layer 321, the first external solder pad 327 is fixed to the second housing 12 and is exposed to form a first external terminal 328. It can be understood that during assembly, the first centering support piece 32 The outer fixing portion 325 of the core support piece 32 is fixedly connected to the first housing 11, and the first external terminal 328 is exposed relative to the first housing 11. After the first housing 11 and the second housing 12 are assembled, the first external terminal 328 can be fixed to the second housing 12 by gluing or other methods; the second centering support piece 42 also includes a second external pad 427 electrically connected to the second copper foil layer 424, the second external pad 427 is arranged in the second housing 12, and a conductive member 13 is also arranged in the second housing 12, one end of the conductive member 13 is electrically connected to the second external pad 427, and the other end of the conductive member 13 is exposed in the second housing 12 to form a second external terminal 131, the first external terminal 328 and the second external terminal 131 are both electrically connected to the external circuit, thereby realizing conductive connection between the external circuit and the first voice coil 33 and the second voice coil 43 respectively. Since the second centering support piece 42 is located on the side of the second shell 12 away from the first shell 11, the electrical connection with the second centering support piece 42 is achieved through the conductive member 13, so that the second external terminal 131 electrically connected to the second centering support piece 42 is conveniently arranged on the side of the second shell 12 close to the first shell 11. In this way, the first external terminal 328 and the second external terminal 131 are both located on the surface of the second shell 12 close to the first shell 11 and are arranged in sequence, which is convenient for wiring connection of the external circuit.

[0079] In some embodiments of the present invention, Figure 3 , Figure 4 , Figure 8 and Fig.12 As shown, the second diaphragm assembly 41 includes a second fold ring 4112, which is recessed in a direction away from the second centering support 42; the first diaphragm assembly 31 includes a first fold ring 3112, and the recessed direction of the first fold ring 3112 is the same as the recessed direction of the second fold ring 4112. Thus, the thickness of the first vibration system 30 and the second vibration system 40 can be further reduced, which is conducive to thinning the product and making the volume smaller.

[0080] In a specific embodiment of the present invention, Figure 3, Figure 4 , Figure 8 As shown, the first diaphragm assembly 31 includes a first diaphragm 311 and a first vibration plate 312 arranged on the first diaphragm 311, the first diaphragm 311 includes a first external connection part 3111, a first fold ring 3112 and a first internal connection part 3113, the two ends of the first fold ring 3112 are respectively connected to the first external connection part 3111 and the first internal connection part 3113, the first external connection part 3111 is fixed to the first outer shell 11, and the first vibration plate 312 is fixed to the first inner connection part 3113, so that the assembly connection of the first diaphragm assembly 31 on the first outer shell 11 is realized.

[0081] In a specific embodiment of the present invention, Figure 3 , Figure 4 , Fig.12 As shown, the second diaphragm assembly 41 includes a second diaphragm 411 and a second vibration plate 412 arranged on the second diaphragm 411, the second diaphragm 411 includes a second outer connecting portion 4111, a second fold ring 4112 and a second inner connecting portion 4113, the two ends of the second fold ring 4112 are respectively connected to the second outer connecting portion 4111 and the second inner connecting portion 4113, the second outer connecting portion 4111 is fixed to the second centering support plate 42, and the second vibration plate 412 is fixed to the second inner connecting portion 4113, so that the second diaphragm assembly 41 is assembled and connected to the second shell 12.

[0082] In one embodiment of the present invention, Figures 1 to 6 As shown, the double-sided sound-emitting device 100 further includes a front cover 50 and a dust-proof net 60. One side of the front cover 50 is connected to the first housing 11. The front cover 50 and the first housing 11 form a frame for protecting the first vibration system 30. The dust-proof net 60 is connected to the other side of the front cover 50. Of course, in some cases, the double-sided sound-emitting device 100 may also not include the front cover 50 and the dust-proof net 60.

[0083] The utility model also discloses an electronic device, including the double-sided sound-emitting device 100 described in the above embodiment of the utility model. The specific structure of the double-sided sound-emitting device 100 refers to the above embodiment. Since the electronic device adopts all the technical features of the above double-sided sound-emitting device 100, the production cost of the electronic device is also greatly reduced.

[0084] It should be noted that the double-sided sound-emitting device 100 of the above embodiment of the utility model can be a speaker unit with a double-sided sound-emitting function, and the double-sided sound-emitting device 100 can be used alone in an electronic device, and the housing assembly of the electronic device can cooperate with the double-sided sound-emitting device 100 to define a corresponding front sound cavity and a rear sound cavity. Of course, the double-sided sound-emitting device 100 can also be designed in the form of a sound module, that is, the double-sided sound-emitting device 100 is installed in a corresponding module housing, and then the assembled sound module is used in an electronic device.

[0085] Optionally, the electronic device in the present invention may be a mobile phone, a stereo, a computer, an earphone, a watch, a television or a tablet computer, etc., which will not be described in detail here.

[0086] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A double-sided sound-emitting device, characterized in that: It comprises a housing assembly, a magnetic circuit system, a first vibration system and a second vibration system, wherein the first vibration system and the second vibration system are respectively arranged on opposite sides of the magnetic circuit system; The first vibration system includes a first diaphragm assembly, a first centering support and a first voice coil, one end of the first voice coil is connected to the first diaphragm assembly, the first voice coil has a first side and a second side that are oppositely arranged, the lead of the first voice coil is located on the first side, the first centering support includes a plurality of support structures arranged on the first side and the second side, the support structure located on the first side includes a first copper foil layer and a first inner pad electrically connected to the first copper foil layer, the lead of the first voice coil is electrically connected to the first inner pad, and the support structure located on the second side is composed of a first substrate layer, and the first substrate layer is made of a non-conductive material; The second vibration system includes a second diaphragm assembly, a second centering support, and a second voice coil. One end of the second voice coil is connected to the second diaphragm assembly, and the second centering support is located between the second diaphragm assembly and the second voice coil.

2. The double-sided sound-emitting device according to claim 1, characterized in that: The first centering support sheet includes two support sheet structures that are opposite and spaced apart from each other, the two support sheet structures including a first support sheet structure located on the first side and a second support sheet structure located on the second side, wherein: The first support sheet structure includes the first substrate layer and the first copper foil layer which are stacked, and the first copper foil layer of the first support sheet structure forms two independent conductive lines; The second support sheet structure includes at least two first substrate layers, and the first substrate layers are PI material layers.

3. The double-sided sound-emitting device according to claim 1, characterized in that: The first centering support includes four support structures distributed in an array, wherein two of the support structures are formed as first support structures located on the first side, and the other two of the support structures are formed as second support structures located on the second side, wherein: The first support sheet structure comprises the first substrate layer and the first copper foil layer which are stacked, and the first copper foil layer of each of the first support sheet structures forms a conductive circuit; The second support sheet structure includes at least two first substrate layers, and the first substrate layers are PI material layers.

4. The double-sided sound-emitting device according to claim 2 or 3, characterized in that: The first centering support plate includes a connecting portion and an inner fixing portion and an outer fixing portion arranged on both sides of the connecting portion, the inner fixing portion is connected to the first voice coil, and the outer fixing portion is connected to the shell assembly. The width of the connecting portion of the second support plate structure is 0.1mm~0.4mm, and / or the thickness of the connecting portion of the second support plate structure is 0.035mm~0.15mm.

5. The double-sided sound-emitting device according to claim 1, characterized in that: The second centering support comprises an annular outer fixing portion, an inner fixing portion arranged on the inner side of the outer fixing portion in the circumferential direction, and a connecting portion arranged between the outer fixing portion and the inner fixing portion, wherein the connecting portions are multiple and respectively connect the outer fixing portion and the inner fixing portion; The second voice coil includes a first side and a second side that are arranged opposite to each other in pairs, the plurality of connecting parts include a first connecting part located on the first side and a second connecting part located on the second side, the first connecting part includes a second copper foil layer, the inner fixing part includes a second inner solder pad electrically connected to the second copper foil layer, the second inner solder pad is electrically connected to the lead of the second voice coil, and the second connecting part is composed of a second substrate layer, and the second substrate layer is made of a non-conductive material.

6. The double-sided sound-emitting device according to claim 5, characterized in that: The second substrate layer includes at least two layers, and / or the second substrate layer is a PI material layer.

7. The double-sided sound-emitting device according to claim 1, characterized in that: The second centering support comprises an annular outer fixing portion, an inner fixing portion arranged on the inner side of the outer fixing portion in the circumferential direction, and a connecting portion arranged between the outer fixing portion and the inner fixing portion, wherein the connecting portions are multiple and respectively connect the outer fixing portion and the inner fixing portion; wherein, There are two connecting parts and they are arranged on opposite sides of the second voice coil, each of the connecting parts includes a second copper foil layer, and the inner fixing part includes a second inner pad electrically connected to the second copper foil layer, and the second inner pad is electrically connected to the lead of the second voice coil.

8. The double-sided sound emitting device according to claim 5 or 7, characterized in that: The housing assembly includes a first shell and a second shell that are arranged opposite to each other, the first centering support piece also includes a first external pad electrically connected to the first copper foil layer, the first external pad is fixed to the second shell and exposed to form a first external terminal, the second centering support piece also includes a second external pad electrically connected to the second copper foil layer, the second external pad is arranged in the second shell, a conductive member is further arranged in the second shell, one end of the conductive member is electrically connected to the second external pad, the other end of the conductive member is exposed in the second shell to form a second external terminal, and both the first external terminal and the second external terminal are electrically connected to an external circuit.

9. The double-sided sound-emitting device according to claim 1, characterized in that: The second diaphragm assembly comprises a second fold ring, and the second fold ring is recessed in a direction away from the second centering support piece; The first diaphragm assembly includes a first fold ring, and the concave direction of the first fold ring is the same as the concave direction of the second fold ring.

10. An electronic device, characterized in that: It comprises a double-sided sound emitting device according to any one of claims 1 to 9.

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