A double-drive double-sided sound speaker

Abstract

A dual-drive double-sided sound-emitting loudspeaker, comprising a first vibration system and a first magnetic circuit system assembled into a first sound-emitting body, and a second vibration system and a second magnetic circuit system assembled into a second sound-emitting body; further comprising a common magnetic conductive plate, wherein the first sound-emitting body and the second sound-emitting body are symmetrically arranged with the common magnetic conductive plate as a symmetry plane. Furthermore, the first magnetic circuit system and the second magnetic circuit system are symmetrically arranged relative to the common magnetic conductive plate, the first vibration system is installed on the outside of the first magnetic circuit system, and the second vibration system is installed on the outside of the second magnetic circuit system. The double diaphragms vibrate to emit sound, and the sound pressure of the double diaphragms can be enhanced by guiding the cavity during assembly of the whole machine, thereby improving the sound. It is conducive to the linear design of speaker vibration, and it is easier to design to reduce nonlinear distortion; it is conducive to avoiding the noise caused by polarization anomalies in speaker vibration; it is conducive to avoiding wire break anomalies caused by mechanical fatigue, and improving product yield.

Description

Technical Field

[0001] The invention relates to a loudspeaker, in particular to a double-driven double-sided sound-emitting loudspeaker. Background Art

[0002] With the development of intelligent and portable electronic products, the requirements for existing micro speakers are getting higher and higher, and more requirements are mainly reflected in the characteristics of small product size, high sound pressure, low distortion, and high power tolerance. In response to these requirements, the following technical routes are implemented:

[0003] 1. The external magnet (4 side magnets) and the internal magnetic circuit are combined in parallel through the magnetic conductive plate to form five magnets, and the magnetic lines of force are gathered through the magnetic conductive plate;

[0004] 2. A single voice coil that is passed through a variable current generates a Lorentz magnetic force in the magnetic field and moves up and down;

[0005] 3. The movement of the coil drives a single diaphragm to push the air and make sound.

[0006] The speakers of the above technical route can refer to Figure 1 The existing loudspeaker design structure shown in the figure includes a diaphragm 91, a voice coil 92, a magnetic circuit assembly 93 and a basin frame 94. The diaphragm 91 includes a folding ring 911 and a dome 912 disposed on the folding ring 911. The voice coil 92 is connected to the folding ring 911. The magnetic circuit assembly 93 includes an inner magnetic steel 930, an inner magnetic plate 931 is disposed above the inner magnetic steel 930, and an annular magnetic plate 932 is disposed outside the inner magnetic plate 931; four outer magnetic steels 933 are disposed around the inner magnetic steel 930, and a lower magnetic plate 934 is disposed below the inner magnetic steel 930 and the outer magnetic steel 933. A gap is provided between the inner magnetic plate 931 and the annular magnetic plate 932 for the voice coil 92 to pass through; the voice coil 92 is at least partially suspended between the inner magnetic steel 930 and the outer magnetic steel 933. The diaphragm 91, voice coil 92 and magnetic circuit assembly 93 are installed in a basin frame 94. A welding piece 941 is provided on the basin frame 94. The welding piece 941 is respectively connected to the coil lead of the voice coil 92 and the connecting line of the external electrical signal feed.

[0007] However, the above technical route also has some obvious disadvantages:

[0008] 1. In order to meet the requirements of higher sound pressure, the magnetic circuit gap is generally designed to be narrower in order to obtain greater magnetic performance. However, a narrow magnetic circuit gap can easily cause the voice coil to rub against the ring when the diaphragm is polarized, resulting in noise;

[0009] 2. Under larger amplitude, the lead wire is easy to break when the coil vibrates, resulting in low tolerable power;

[0010] 3. There is magnetic leakage in the lower magnetic plate, and the utilization rate of magnetic performance is low. Summary of the invention

[0011] In view of the above situation, the present invention proposes a double-driven double-sided sound-emitting loudspeaker in order to solve the above-mentioned problems.

[0012] A dual-drive double-sided sound-emitting loudspeaker according to the present invention comprises a first vibration system and a first magnetic circuit system assembled into a first sound-emitting body, and a second vibration system and a second magnetic circuit system assembled into a second sound-emitting body; and also comprises a common magnetic conductive plate, wherein the first sound-emitting body and the second sound-emitting body are symmetrically arranged with the common magnetic conductive plate as a symmetry plane.

[0013] Furthermore, the first magnetic circuit system and the second magnetic circuit system are symmetrically arranged relative to the common magnetic conductive plate, the first vibration system is installed on the outside of the first magnetic circuit system, and the second vibration system is installed on the outside of the second magnetic circuit system.

[0014] Further, the first magnetic circuit system includes a first inner magnetic steel and a first outer magnetic steel arranged around the first inner magnetic steel, a first intermediate magnetic conductive plate is provided on one side of the first inner magnetic steel, a first annular magnetic conductive plate is provided around the first intermediate magnetic conductive plate, and the other side of the first inner magnetic steel is a common magnetic conductive plate; the second magnetic circuit system includes a second inner magnetic steel and a second outer magnetic steel arranged around the second inner magnetic steel, a second intermediate magnetic conductive plate is provided on one side of the second inner magnetic steel, a second annular magnetic conductive plate is provided around the second intermediate magnetic conductive plate, and the other side of the second inner magnetic steel is a common magnetic conductive plate.

[0015] Preferably, the first outer magnetic steel is four magnetic steel strips distributed around the first inner magnetic steel, and the second outer magnetic steel is four magnetic steel strips distributed around the second inner magnetic steel.

[0016] Further, the first vibration system includes a first diaphragm and a first voice coil, the first diaphragm includes a first folded ring and a first dome arranged on the first folded ring, and the first voice coil is connected to the first folded ring; the second vibration system includes a second diaphragm and a second voice coil, the second diaphragm includes a second folded ring and a second dome arranged on the second folded ring, and the second voice coil is connected to the second folded ring.

[0017] Furthermore, the first magnetic circuit system is provided with a first inner magnetic steel and a first outer magnetic steel arranged around the first inner magnetic steel, a first intermediate magnetic conductive plate is provided on one side of the first inner magnetic steel, and a first annular magnetic conductive plate is provided around the first intermediate magnetic conductive plate; a gap is provided between the first intermediate magnetic conductive plate and the first annular magnetic conductive plate for the first voice coil to pass through, and the first voice coil is at least partially suspended between the first inner magnetic steel and the first outer magnetic steel.

[0018] Furthermore, the second magnetic circuit system is provided with a second inner magnetic steel and a second outer magnetic steel arranged around the second inner magnetic steel, a second intermediate magnetic conductive plate is provided on one side of the second inner magnetic steel, and a second annular magnetic conductive plate is provided around the second intermediate magnetic conductive plate; a gap is provided between the second intermediate magnetic conductive plate and the second annular magnetic conductive plate for the second voice coil to pass through, and the second voice coil is at least partially suspended between the second inner magnetic steel and the second outer magnetic steel.

[0019] Furthermore, the first vibration system and the first magnetic circuit system are installed on a first basin frame, and the first basin frame is also provided with a first welding piece; the second vibration system and the second magnetic circuit system are installed on a second basin frame, and the second basin frame is also provided with a second welding piece.

[0020] Preferably, the first welding piece is respectively connected to the coil lead of the first voice coil provided in the first vibration system and the connecting line for externally feeding an electrical signal; the second welding piece is respectively connected to the coil lead of the second voice coil provided in the second vibration system and the connecting line for externally feeding an electrical signal.

[0021] Preferably, the first welding piece is connected to the coil lead of the first voice coil provided in the first vibration system, the second welding piece is connected to the coil lead of the second voice coil provided in the second vibration system, and the first welding piece and the second welding piece are connected in series and then connected to the connecting line for externally feeding in electrical signals.

[0022] After adopting the technology proposed by the present invention, according to the technical solution of the present invention, the following beneficial effects are achieved:

[0023] 1) The double diaphragms vibrate to produce sound. By guiding the cavity during assembly of the whole machine, the sound pressure of the double diaphragms can be enhanced, thereby improving the sound.

[0024] 2) Decompose a large amplitude system into two mirrored systems, each with half the amplitude of the large amplitude. This has the following advantages:

[0025] It is conducive to the linear design of speaker vibration and easier to design to reduce nonlinear distortion;

[0026] It helps to avoid the noise caused by polarization anomalies in speaker vibration;

[0027] It is helpful to avoid abnormal wire breaking caused by mechanical fatigue and improve product yield.

[0028] 3) The inner magnetic circuit and the outer magnetic circuit are connected in parallel through a magnetic conductive plate, and the upper and lower speakers are also connected in parallel through a magnetic conductive plate. The magnetic circuits between the two speakers can supplement each other's magnetic energy and increase the utilization rate of magnetic energy.

[0029] 4) The two voice coils can be powered and driven in series or in parallel according to the design of the audio circuit; and the driving of the two voice coils can be set to be synchronous driving, and the vibration direction is mirror vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Design structural exploded views for existing loudspeakers;

[0031] Figure 2 It is a structural exploded view of a dual-drive dual-sided sound-emitting loudspeaker according to an embodiment of the present application;

[0032] Figure 3 It is a cross-sectional structural diagram of a dual-drive double-sided sound-emitting loudspeaker according to an embodiment of the present application.

[0033] Description of reference numerals:

[0034] First diaphragm 11 Second external magnetic steel 233

[0035] First fold ring 111 Second basin frame 24

[0036] First ball top 112 Second welding piece 241

[0037] The first voice coil 12 shares the magnetic plate 5

[0038] First inner magnetic steel 130 Diaphragm 91

[0039] First intermediate magnetic plate 131 folding ring 911

[0040] First annular magnetic plate 132 ball top 912

[0041] First outer magnetic steel 133 Voice coil 92

[0042] First basin frame 14 magnetic circuit assembly 93

[0043] First welding piece 141 Internal magnetic steel 930

[0044] Second diaphragm 21 inner magnetic plate 931

[0045] Second fold ring 211 annular magnetic plate 932

[0046] Second ball top 212 External magnetic steel 933

[0047] Second voice coil 22 Lower magnetic plate 934

[0048] Second inner magnetic steel 230 basin frame 94

[0049] Second intermediate magnetic conductive plate 231 welding piece 941

[0050] The second annular magnetic conductive plate 232 DETAILED DESCRIPTION

[0051] The present invention will be further described in detail below with reference to the embodiments given in the accompanying drawings. The described embodiments include various specific details to help understanding, but they can only be regarded as exemplary and are part of the embodiments of the present invention, not all of the embodiments. At the same time, in order to make the description clearer and more concise, detailed descriptions of functions and structures well known in the art will be omitted.

[0052] Unless otherwise defined, the technical terms or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which the present invention belongs. The "upper", "lower" or "above" and "below" mentioned in this application are the upper and lower relationships roughly shown in the drawings of this application. When the placement state changes, such as when it is turned over, the corresponding positional relationship should also be changed accordingly to understand or implement the technical solution of this application.

[0053] like Figure 2 and Figure 3 As shown, a dual-drive double-sided sound-emitting loudspeaker includes a first vibration system and a first magnetic circuit system assembled into a first sound-emitting body and a second vibration system and a second magnetic circuit system assembled into a second sound-emitting body; and also includes a common magnetic conductive plate 5, wherein the first sound-emitting body and the second sound-emitting body are symmetrically arranged with the common magnetic conductive plate 5 as a symmetry plane. In view of the fact that the common magnetic conductive plate is a part with a certain thickness, it can also be regarded that the first sound-emitting body and the second sound-emitting body are symmetrically arranged with the central plane of the common magnetic conductive plate as a symmetry plane.

[0054] Furthermore, the first magnetic circuit system and the second magnetic circuit system are symmetrically arranged relative to the common magnetic conductive plate 5, the first vibration system is installed on the outside of the first magnetic circuit system, and the second vibration system is installed on the outside of the second magnetic circuit system.

[0055] Furthermore, the first magnetic circuit system includes a first inner magnetic steel 130 and a first outer magnetic steel 133 arranged around the first inner magnetic steel 130, a first intermediate magnetic conductive plate 131 is provided on one side of the first inner magnetic steel 130, a first annular magnetic conductive plate 132 is provided around the first intermediate magnetic conductive plate 131, and the other side of the first inner magnetic steel 130 is a common magnetic conductive plate 5; the second magnetic circuit system includes a second inner magnetic steel 230 and a second outer magnetic steel 233 arranged around the second inner magnetic steel 230, a second intermediate magnetic conductive plate 231 is provided on one side of the second inner magnetic steel 230, a second annular magnetic conductive plate 232 is provided around the second intermediate magnetic conductive plate 231, and the other side of the second inner magnetic steel 230 is a common magnetic conductive plate 5.

[0056] Furthermore, the first outer magnetic steel 133 is four magnetic steel strips distributed around the first inner magnetic steel 130 , and the second outer magnetic steel 233 is four magnetic steel strips distributed around the second inner magnetic steel 230 .

[0057] The first vibration system includes a first diaphragm 11 and a first voice coil 12, the first diaphragm 11 includes a first folded ring 111 and a first dome 112 arranged on the first folded ring 111, and the first voice coil 12 is connected to the first folded ring 111; the second vibration system includes a second diaphragm 21 and a second voice coil 22, the second diaphragm 21 includes a second folded ring 211 and a second dome 212 arranged on the second folded ring 211, and the second voice coil 22 is connected to the second folded ring 211.

[0058] Furthermore, a gap is provided between the first intermediate magnetic conductive plate 131 and the first annular magnetic conductive plate 132 for the first voice coil 12 to pass through, and the first voice coil 12 is at least partially suspended between the first inner magnetic steel 130 and the first outer magnetic steel 133 .

[0059] Furthermore, a gap is provided between the second intermediate magnetic conductive plate 231 and the second annular magnetic conductive plate 232 for the second voice coil 22 to pass through, and the second voice coil 22 is at least partially suspended between the second inner magnetic steel 230 and the second outer magnetic steel 233 .

[0060] The first vibration system and the first magnetic circuit system are installed on a first basin frame 14 , and a first welding piece 141 is also provided on the first basin frame 14 ; the second vibration system and the second magnetic circuit system are installed on a second basin frame 24 , and a second welding piece 241 is also provided on the second basin frame 24 .

[0061] As a specific implementation, the first welding piece 141 is respectively connected to the coil lead of the first voice coil 12 provided in the first vibration system and the connecting line of the external electrical signal feed-in; the second welding piece 241 is respectively connected to the coil lead of the second voice coil 22 provided in the second vibration system and the connecting line of the external electrical signal feed-in.

[0062] As another specific embodiment, the first welding piece 141 is connected to the coil lead of the first voice coil 12 provided in the first vibration system, and the second welding piece 241 is connected to the coil lead of the second voice coil 22 provided in the second vibration system, and the first welding piece 141 and the second welding piece 241 are connected in series and then connected to the connecting line of the external electrical signal feeding.

[0063] According to the double-drive double-sided sound-emitting loudspeaker of the above embodiment, compared with the prior art, two independent five-magnetic loudspeakers are combined together through a common magnetic conductive plate to form a double-sided mirror loudspeaker, and the common magnetic conductive plate serves as a symmetry plane of the two independent loudspeakers, and the common magnetic conductive plate serves as both a component of the first magnetic circuit system and a component of the second magnetic circuit system. The two independent loudspeakers described here are different from the loudspeakers of the prior art in terms of their sound-emitting function and their complete components, mainly in that the independent lower magnetic conductive plate is cancelled, and the function of the two lower magnetic conductive plates is replaced by a common magnetic conductive plate.

[0064] According to the dual-drive double-sided sound-emitting loudspeaker of the above embodiment, compared with the prior art, the inner magnetic circuit and the outer magnetic circuit are connected in parallel through a magnetic conductive plate, and the upper and lower speakers are also connected in parallel through a magnetic conductive plate. The magnetic circuits between the two speakers can supplement each other's magnetic energy, thereby increasing the utilization rate of magnetic energy.

[0065] According to the dual-drive dual-sided sound speaker of the above embodiment, compared with the prior art, the two voice coils can be powered and driven in series or in parallel according to the design of the audio circuit; and the driving of the two voice coils can be set to synchronous driving, and the vibration direction is mirror vibration.

[0066] The dual-drive dual-sided sound-emitting loudspeaker according to the above embodiment has the following beneficial effects through the above improvements compared to the prior art:

[0067] 1. The double diaphragms vibrate to produce sound. Through the guidance of the cavity during the assembly of the whole machine, the sound pressure of the double diaphragms can be enhanced, thereby improving the sound;

[0068] 2. Decompose a large amplitude system into two mirrored systems, each with half the amplitude of the large amplitude. This has the following advantages:

[0069] 2.1 It is conducive to the linear design of speaker vibration and is easier to design to reduce nonlinear distortion;

[0070] 2.2 It helps to avoid the noise caused by polarization anomalies in speaker vibration;

[0071] 2.3 It is helpful to avoid abnormal wire breaking caused by mechanical fatigue and improve product yield.

Claims

1. A dual-drive double-sided sound-emitting loudspeaker, characterized in that: The invention comprises a first vibration system and a first magnetic circuit system assembled into a first sound-emitting body, and a second vibration system and a second magnetic circuit system assembled into a second sound-emitting body; further comprising a common magnetic conductive plate (5), wherein the first sound-emitting body and the second sound-emitting body are symmetrically arranged with the common magnetic conductive plate (5) as a symmetry plane; the first magnetic circuit system and the second magnetic circuit system are symmetrically arranged relative to the common magnetic conductive plate (5), the first vibration system is installed on the outside of the first magnetic circuit system, and the second vibration system is installed on the outside of the second magnetic circuit system; The first magnetic circuit system comprises a first inner magnetic steel (130) and a first outer magnetic steel (133) arranged around the first inner magnetic steel (130); a first intermediate magnetic conductive plate (131) is arranged on one side of the first inner magnetic steel (130); a first annular magnetic conductive plate (132) is arranged around the first intermediate magnetic conductive plate (131); and a common magnetic conductive plate (5) is arranged on the other side of the first inner magnetic steel (130); the second magnetic circuit system comprises a second inner magnetic steel (230) and a second outer magnetic steel (233) arranged around the second inner magnetic steel (230); a second intermediate magnetic conductive plate (231) is arranged on one side of the second inner magnetic steel (230); a second annular magnetic conductive plate (232) is arranged around the second intermediate magnetic conductive plate (231); and a common magnetic conductive plate (5) is arranged on the other side of the second inner magnetic steel (230); The first vibration system comprises a first diaphragm (11) and a first voice coil (12), the first diaphragm (11) comprises a first folded ring (111) and a first spherical top (112) arranged on the first folded ring (111), and the first voice coil (12) is connected to the first folded ring (111); the second vibration system comprises a second diaphragm (21) and a second voice coil (22), the second diaphragm (21) comprises a second folded ring (211) and a second spherical top (212) arranged on the second folded ring (211), and the second voice coil (22) is connected to the second folded ring (211); A gap is provided between the first intermediate magnetic conductive plate (131) and the first annular magnetic conductive plate (132) for the first voice coil (12) to pass through, and the first voice coil (12) is at least partially suspended between the first inner magnetic steel (130) and the first outer magnetic steel (133); a gap is provided between the second intermediate magnetic conductive plate (231) and the second annular magnetic conductive plate (232) for the second voice coil (22) to pass through, and the second voice coil (22) is at least partially suspended between the second inner magnetic steel (230) and the second outer magnetic steel (233); The first vibration system and the first magnetic circuit system are mounted on a first basin frame (14), and the first basin frame (14) is also provided with a first welding piece (141); the second vibration system and the second magnetic circuit system are mounted on a second basin frame (24), and the second basin frame (24) is also provided with a second welding piece (241); The first welding piece (141) is connected to the coil lead of the first voice coil (12) provided in the first vibration system, the second welding piece (241) is connected to the coil lead of the second voice coil (22) provided in the second vibration system, and the first welding piece (141) and the second welding piece (241) are respectively connected to the connection line of the external electrical signal feed-in, or the first welding piece (141) and the second welding piece (241) are connected in series and then connected to the connection line of the external electrical signal feed-in.

2. A dual-drive double-sided sound speaker according to claim 1, characterized in that: The first outer magnetic steel (133) is four magnetic steel strips distributed around the first inner magnetic steel (130), and the second outer magnetic steel (233) is four magnetic steel strips distributed around the second inner magnetic steel (230).

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