WO2022000655A1

WO2022000655A1 - Sound production device

Info

Publication number: WO2022000655A1
Application number: PCT/CN2020/104687
Authority: WO
Inventors: 梁平; 赵彬
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2020-06-30
Filing date: 2020-07-25
Publication date: 2022-01-06
Also published as: CN212519416U

Abstract

The present invention provides a sound production device, comprising a frame, and a vibration system and a magnetic circuit system having a magnetic gap that are separately fixed to the frame. The vibration system comprises a vibrating diaphragm fixed on the frame and a voice coil inserted into the magnetic gap to drive the vibrating diaphragm to vibrate and produce sound. The vibrating diaphragm comprises an upper voice diaphragm and a dome. The upper voice diaphragm comprises a folding ring, and a fixed part and a vibrating part that extend from both sides of the folding ring. The fixed part is connected to the frame. The dome is connected to the vibrating part. The upper voice diaphragm further comprises an inner edge connecting the folding ring to the vibrating part, and an outer edge connecting the folding ring to the fixed part. The inner edge comprises at least one arc concave edge that curves away from the dome. The dome comprises at least one arc protrusion corresponding to the arc concave edge. The sound production device can increase the vibration area of the vibrating diaphragm and adjusts the structural strength distribution of the sound production device to improve swing.

Description

sound device

technical field

The present invention relates to the field of acoustics and electricity, in particular to a sound-generating device.

Background technique

With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. At present, the functions of mobile phones are extremely diverse, one of which is the high-quality music function. Therefore, sound-generating devices for playing sound are widely used in smart mobile devices.

The sound-generating device of the related art includes a basin frame, a vibration system and a magnetic circuit system with a magnetic gap respectively fixed on the basin frame; the vibration system includes a diaphragm fixed on the basin frame, inserted in the The magnetic gap is used to drive the diaphragm to vibrate and produce a voice coil. The diaphragm includes a fold ring connected with the basin frame and a dome connected with the fold ring. The fold ring is in the shape of a ring, which includes an inner ring. side and outer side, the inner side and the outer side are both straight sides. In the sound-emitting device of the related art, the vibrating area of the diaphragm is small, and the performance is not up to the standard.

Therefore, a new sound-generating device must be provided to solve the above-mentioned technical problems.

technical problem

The purpose of the present invention is to provide a sounding device which can increase the vibrating area of the diaphragm.

technical solutions

In order to achieve the above object, the present invention provides a sound-generating device, which includes a basin frame, a vibration system and a magnetic circuit system with a magnetic gap respectively fixed to the basin frame; the vibration system includes a vibration system fixed to the basin frame. A vibrating membrane and a voice coil inserted in the magnetic gap to drive the vibrating membrane to vibrate and produce sound, the vibrating membrane includes an upper sound membrane and a dome, the upper sound membrane includes a folded ring and two sides from the folded ring An extended fixed part and a vibration part, the fixed part is connected with the basin frame, the dome is connected with the vibration part, and the upper sound membrane also includes an inner part connecting the ring and the vibration part. the edge and the outer edge connecting the folded ring and the fixing part, the inner edge includes at least one arc-shaped concave edge curved in a direction away from the spherical top, and the spherical top includes at least one arc-shaped concave edge connected to the arc-shaped concave edge. The arc-shaped convex part corresponding to the edge.

Preferably, the outer edge includes at least one first straight edge corresponding to the arc-shaped concave edge, and the vertical distance between the arc-shaped concave edge and the first straight edge is from the middle of the arc-shaped concave edge to the two sides. side gradually increased.

Preferably, the outer edge further includes a second straight edge, and the two oppositely disposed first straight edges and the two oppositely disposed second straight edges are joined to form a square ring; the inner edge further includes a third straight edge. For straight sides, two oppositely arranged arc-shaped concave sides and two oppositely arranged third straight sides are joined to form a ring shape, and the third straight sides are arranged corresponding to the second straight sides.

Preferably, the outer edge has a rectangular shape, and the first straight edge is longer than the second straight edge, or the first straight edge is shorter than the second straight edge.

Preferably, the sound-generating device further includes an elastic support component fixed on the basin frame and opposite to the diaphragm and arranged at intervals, and the voice coil includes a voice coil body connected with the dome and a voice coil from the voice coil. A connecting line protruding from one end of the ring body away from the spherical top is connected with the elastic supporting component.

Preferably, the elastic support assembly includes an elastic connecting piece connected with the basin frame and an auxiliary membrane connected with an end of the elastic connecting member away from the basin frame, and the elastic connecting member is connected with the connecting line.

Preferably, the elastic connector is a flexible circuit board.

Preferably, the magnetic circuit system includes a magnetic yoke connected to the basin frame, a main magnetic steel, a first auxiliary magnetic steel and a second auxiliary magnetic steel arranged on the magnetic yoke, and covered on the main magnetic steel The main pole core on the steel, the upper splint connected to the basin frame, and the third auxiliary magnetic steel connected to the upper splint, the first auxiliary magnetic steel, the second auxiliary magnetic steel and the main magnetic steel Steels are arranged at intervals to form the magnetic gap, the upper clamping plate is located between the magnetic yoke and the basin frame, and the elastic connecting piece is connected to an end of the upper clamping plate away from the basin frame.

Preferably, the upper clamping plate includes an annular portion fixed to the basin frame, a first secondary pole core and a second secondary pole core arranged on the annular portion, and the first secondary magnetic steel is far away from the yoke One end of the magnetic steel is connected to the first secondary pole core, the third secondary magnetic steel is connected to the end of the first secondary pole core away from the first secondary magnetic steel, and the second secondary magnetic steel is far away from the magnetic steel. One end of the yoke is connected to the second secondary pole core.

Preferably, the dome is provided with an annular recess, and the vibrating portion is installed in the annular recess.

beneficial effect

Compared with the related art, the inner edge of the sound-emitting device provided by the present invention includes an arc-shaped concave edge, and the outer edge is kept unchanged, so that the area of the vibrating part and the dome is increased, thereby increasing the vibration of the diaphragm. The vibration area increases the sound pressure level (SPL for short) of the sound-emitting device, and adjusts the structural strength distribution of the sound-emitting device to improve the swing; The arc-shaped concave edge is bent in a direction away from the dome, and the height of the folding ring at the arc-shaped concave edge increases, which improves the change of the arc length of the diaphragm due to the convexity of the folding ring. short question.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort, among which.

FIG. 1 is an exploded view of the sound-emitting device of the present invention.

FIG. 2 is a schematic three-dimensional structural diagram of the ring of the sound-emitting device shown in FIG. 1 .

FIG. 3 is a schematic structural diagram of the sounding device shown in FIG. 1 after being assembled.

FIG. 4 is a cross-sectional view of the sound-emitting device shown in FIG. 3 along the direction A-A in FIG. 3 .

FIG. 5 is a schematic diagram of the orthographic structure of the diaphragm shown in FIG. 1 .

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIGS. 1-5 at the same time, according to the sound-generating device 100 provided by the present invention, the sound-generating device includes a basin frame 1 , a vibration system 2 respectively fixed to the basin frame 1 , and a magnetic circuit system 3 having a magnetic gap 30 . The basin frame 1 is used to support the vibration system 2 and the magnetic circuit system 3 .

The vibration system 2 includes a diaphragm 21 fixed on the basin frame 1 , a voice coil 22 inserted in the magnetic gap 30 to drive the diaphragm 21 to vibrate and produce sound, and a voice coil 22 fixed on the basin frame 1 and connected to the The elastic supporting components 23 are arranged opposite and spaced apart from the diaphragm 21 . The diaphragm 21 includes an upper sound film 211 and a dome 212, the upper sound film 211 includes a folded ring 2111, a fixed portion 2112 and a vibrating portion 2113 extending from both sides of the folded ring 2111, and connected to the folded ring. 2111 and the inner edge 2114 of the vibrating part 2113 and the outer edge 2115 connecting the folding ring 2111 and the fixing part 2112, the fixing part 2112 is connected with the basin frame 1, and the dome 212 is connected with the fixing part 2112. The part 2112 is connected, and the voice coil 22 is connected with the dome 212 .

Specifically, the folding ring 211 is substantially a square ring shape, and the inner edge 2114 and the outer edge 2115 are also substantially square ring shape. The outer edge 2115 includes two oppositely arranged first straight edges 2118 and two oppositely arranged second straight edges 2119 , any of the first straight edges 2118 is connected to the adjacent second straight edges 2119 . The inner side 2114 includes two oppositely arranged arc-shaped concave sides 2116 and two oppositely arranged third straight sides 2117 , any of the arc-shaped concave sides 2116 is connected to its adjacent third straight side 2117 . Wherein, the arc-shaped concave edge 2116 and the first straight edge 2118 are correspondingly arranged and curved in a direction away from the dome 212 , and the third straight edge 2117 and the second straight edge 2119 are arranged correspondingly and mutually In parallel, the vertical distance D between the arc-shaped concave edge 2116 and the first straight edge 2118 gradually increases toward both sides from the middle of the arc-shaped concave edge 2116 . As shown in FIG. 5 , the distance from the midpoint of the arc-shaped concave edge 2116 to the first straight edge 2118 is D1, and the distance from the end point of the arc-shaped concave edge 2116 to the first straight edge 2118 is D2 , the distance D1 is less than the distance D2.

In this embodiment, the outer edge 2115 has a rectangular shape, the first straight edge 2118 is longer than the second straight edge 2119, that is, the first straight edge 2118 is the long edge of the outer edge 2115, and the The second straight side 2119 is the short side of the outer side 2115 . Correspondingly, the inner side 2114 is substantially rectangular, the arc-shaped concave side 2116 is the long side of the inner side 2114 , and the third straight side 2117 is the short side of the inner side 2114 . In other embodiments, the first straight side 2118 can also be set to be shorter than the second straight side 2119, that is, the first straight side 2118 can be set as the short side of the outer side 2115, which is the same as the second straight side 2119. The arc-shaped concave side 2116 corresponding to the straight side 2118 is also correspondingly set as the short side of the inner side 2114 .

The dome 212 includes two oppositely arranged arc-shaped convex portions 2121 and two opposite flat portions 2122 connecting the two arc-shaped convex portions 2121. The two arc-shaped convex portions 2121 and the two The arc-shaped concave edges 2116 are correspondingly arranged, the two flat portions 2122 are corresponding to and parallel to the two third straight edges 2117, the distance from the arc-shaped convex portion 2121 to the arc-shaped concave edge 2116, the The distances from the flat portion 2122 to the third straight edge 2117 are substantially equal.

It can be understood that since the inner side 2114 is provided with the arc-shaped concave side 2116, the area enclosed by the inner side 2114 is also increased, the area of the vibrating portion 2113 is correspondingly increased, and the dome 212 also passes through Setting the arc-shaped convex portion 2121 expands its area, thereby increasing the vibration area of the diaphragm 21, improving the sound pressure level (SPL) of the sound-emitting device 100, and adjusting the sound-emitting device 100. Structural strength distribution of device 100 to improve rocking. In addition, the overall size of the folded ring 2111 remains unchanged, because the arc-shaped concave edge 2116 is formed by bending the inner edge 2114 in the direction away from the dome 212 , and the folded ring 2111 is at the arc-shaped concave edge. The height of the diaphragm 2116 is increased by being squeezed, which improves the problem that the arc length of the diaphragm 211 is shortened due to the bulging ring 2111 .

As shown in FIG. 1 and FIG. 4 , the voice coil 22 includes a voice coil body 221 connected to the dome 212 and a connecting wire 222 protruding from the end of the voice coil body 221 away from the dome 212 , The elastic support assembly 23 includes an elastic connecting piece 231 connected with the basin frame 1 and an auxiliary membrane 232 connected with the end of the elastic connecting member 213 away from the basin frame 1 . The elastic connecting member 231 is connected to the Line 222 connects. Optionally, the elastic connector is a 231 flexible circuit board, the sound-emitting device 100 can transmit signals to the voice coil body 221 through the elastic connector 231, and the connecting wire 222 simultaneously serves as a fixed connection and electrical function. The role of sexual connection.

The magnetic circuit system 3 includes a magnetic yoke 31 connected to the basin frame 1 , a main magnetic steel 32 arranged on the magnetic yoke 31 , two oppositely arranged first secondary magnetic steels 33 and two oppositely arranged magnetic steels 32 . The second auxiliary magnetic steel 34 , the main pole core 36 covered on the main magnetic steel 32 , the upper clamp plate 37 connected to the basin frame 1 , and the two opposite third auxiliary plates connected to the upper clamp plate 37 The magnetic steel 35 , the first auxiliary magnetic steel 33 and the second auxiliary magnetic steel 34 are spaced apart from the main magnetic steel 32 to form the magnetic gap 30 . The upper clamping plate 37 is located between the yoke 31 and the basin frame 1 , and the elastic connecting member 231 is connected to an end of the upper clamping plate 37 away from the basin frame 1 . The upper clamping plate 37 includes an annular portion 371 fixed to the basin frame 1 , and a first secondary pole core 372 and a second secondary pole core 373 disposed on the annular portion 371 , and the first secondary magnetic steel 33 is far away from the One end of the yoke 31 is connected to the first secondary pole core 372 , the third secondary magnetic steel 35 is connected to the end of the first secondary pole core 372 away from the first secondary magnetic steel 33 , the One end of the second secondary magnetic steel 34 away from the yoke 31 is connected to the second secondary pole core 373 .

It can be seen that the sounding device 100 constitutes a plurality of magnetic steel magnetic circuits by arranging the main magnetic steel 32 , the first auxiliary magnetic steel 33 , the second auxiliary magnetic steel 34 and the third auxiliary magnetic steel 35 , the driving performance of the magnetic circuit system 3 is increased, and the vibration effect of the vibration system 2 is improved. In addition, the sound generating device 100 further concentrates the magnetic lines of force of the magnetic circuit system 3 by arranging the main pole core 36 , the first auxiliary pole core 372 and the second auxiliary pole core 373 , so that all The magnetic performance of the magnetic circuit system 3 is better, thereby further improving the acoustic performance of the sound-emitting device 100 .

The above are only the embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these belong to the present invention. scope of protection.

Claims

A sounding device includes a basin frame, a vibration system respectively fixed to the basin frame and a magnetic circuit system with a magnetic gap; the vibration system includes a vibrating membrane fixed to the basin frame and a The gap is used to drive the diaphragm to vibrate and produce a voice coil, the diaphragm includes an upper sound diaphragm and a dome, and the upper sound diaphragm includes a folded ring and a fixed part and a vibrating part extending from both sides of the folded ring, The fixed part is connected with the basin frame, and the dome is connected with the vibration part. The outer edge of the folded ring and the fixing part, the inner edge includes at least one arc-shaped concave edge curved in a direction away from the spherical top, and the spherical top includes at least one arc-shaped concave edge corresponding to the arc-shaped concave edge convex part.
The sound-emitting device according to claim 1, wherein the outer edge comprises at least one first straight edge corresponding to the arc-shaped concave edge, and the vertical distance between the arc-shaped concave edge and the first straight edge is It gradually increases from the middle of the arc-shaped concave edge to both sides.
The sound-emitting device according to claim 2, wherein the outer edge further comprises a second straight edge, and the two oppositely disposed first straight edges and the two oppositely disposed second straight edges are joined to form a square shape The inner edge also includes a third straight edge, the two oppositely arranged arc-shaped concave edges and the two oppositely arranged third straight edges are joined to form a ring shape, and the third straight edge and the The second straight edge is set accordingly.
The sound-emitting device according to claim 3, wherein the outer side is in a rectangular shape, the first straight side is longer than the second straight side, or the first straight side is longer than the second straight side short.
The sound-generating device according to claim 1, characterized in that, the sound-generating device further comprises an elastic support component fixed to the basin frame and opposite to the diaphragm and arranged at intervals, and the voice coil comprises a The top-connected voice coil body and a connecting wire protruding from one end of the voice coil body away from the dome, and the connecting wire is connected to the elastic support assembly.
The sound-generating device according to claim 5, wherein the elastic support assembly comprises an elastic connecting piece connected with the basin frame and an auxiliary membrane connected with an end of the elastic connecting member away from the basin frame, the The elastic connecting piece is connected with the connecting wire.
The sound-generating device according to claim 6, wherein the elastic connecting member is a flexible circuit board.
The sound-generating device according to claim 6, wherein the magnetic circuit system comprises a magnetic yoke connected to the basin frame, a main magnetic steel, a first auxiliary magnetic steel and a second magnetic steel arranged on the magnetic yoke Auxiliary magnetic steel, a main pole core covered on the main magnetic steel, an upper splint connected to the basin frame, and a third auxiliary magnetic steel connected to the upper splint, the first auxiliary magnetic steel, the The second secondary magnetic steel and the main magnetic steel are spaced apart to form the magnetic gap, the upper clamping plate is located between the magnetic yoke and the basin frame, and the elastic connecting piece and the upper clamping plate are far away from the One end of the pot holder is connected.
The sound-generating device according to claim 8, wherein the upper clamping plate comprises an annular portion fixed to the basin frame and a first secondary pole core and a second secondary pole core arranged on the annular portion, so One end of the first secondary magnetic steel away from the yoke is connected to the first secondary pole core, and the third secondary magnetic steel is connected to the end of the first secondary pole core away from the first secondary magnetic steel, One end of the second secondary magnetic steel away from the yoke is connected to the second secondary pole core.