CN212992594U

CN212992594U - Lower vibrating diaphragm, mold and loudspeaker

Info

Publication number: CN212992594U
Application number: CN202021340895.0U
Authority: CN
Inventors: 曾健
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2021-04-16
Anticipated expiration: 2030-07-09
Also published as: WO2022006955A1

Abstract

The utility model provides a lower vibrating diaphragm, mould and speaker. The lower vibrating diaphragm adopts the first and second folding ring segments with different rigidity, the first folding ring segment with higher rigidity is just opposite to the first flexible circuit board welded with the lead-out wire of the voice coil, the first fixing part and the second fixing part of the first folding ring segment connect the voice coil part on one side of the first flexible circuit board and the magnetic circuit part, and the rigidity reduction of the first flexible circuit board which becomes soft due to heating caused by alternating current can be compensated, so that the swinging is inhibited.

Description

Lower vibrating diaphragm, mold and loudspeaker

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic conversion field especially relates to a lower vibrating diaphragm, mould and speaker.

[ background of the invention ]

The conventional SLS lower diaphragm and FPC (flexible circuit board) are left-right symmetric structures. Since the inlet and outlet wires of the voice coil are welded to the bonding pads of the FPC on one side, the FPC on the side becomes soft and less rigid due to heat generation caused by the alternating current when the speaker (fig. 1) operates. The rigidity of the FPC on the other side is basically unchanged, and the asymmetry of the rigidity in working can cause swinging. The swinging can cause problems of high order, pure sound and the like, thereby influencing the normal use of the product.

Therefore, it is necessary to provide a lower diaphragm, a mold and a speaker.

[ Utility model ] content

An object of the utility model is to provide a lower vibrating diaphragm, mould and speaker to solve the FPC rigidity asymmetry of present speaker and the problem of swaing that arouses.

In order to solve the technical problem, the utility model discloses a technical scheme one is:

the lower vibrating diaphragm is arranged on a loudspeaker, the loudspeaker comprises a vibrating system and a magnetic circuit system for driving the vibrating system to vibrate and produce sound, the magnetic circuit system is provided with a magnetic gap, the vibrating system comprises a sound film, a voice coil supported on one side, close to the magnetic circuit system, of the sound film, a circuit board fixed on the voice coil and the lower vibrating diaphragm fixed on one side, away from the sound film, of the voice coil, and one side, away from the sound film, of the voice coil is inserted into the magnetic gap; the circuit board comprises a first flexible circuit board and a second flexible circuit board which are symmetrically arranged on two opposite sides of the voice coil along a first direction, a leading-out wire of the voice coil is welded with the first flexible circuit board, the lower vibrating diaphragm comprises a first fixing part relatively fixed with the voice coil, a second fixing part relatively fixed with the magnetic circuit system and arranged at an interval with the first fixing part, and a folding ring connected between the first fixing part and the second fixing part, the folding ring comprises a first folding ring section just opposite to the first flexible circuit board and a second folding ring section just opposite to the second flexible circuit board, the rigidity of the first folding ring section is larger than that of the second folding ring section, and the first direction is perpendicular to the vibration direction of the voice diaphragm.

In some embodiments of the lower diaphragm, the first loop section includes a first connection surface connected to the first fixing portion, a second connection surface connected to the second fixing portion, and a third connection surface connected between the first connection surface and the second connection surface;

the second folded ring section comprises a fourth connecting surface connected with the first fixing part, a fifth connecting surface connected with the second fixing part and a sixth connecting surface connected between the fourth connecting surface and the fifth connecting surface;

the curvature of the first connecting surface is smaller than that of the fourth connecting surface, the curvature of the second connecting surface is smaller than that of the fifth connecting surface, and the curvature of the third connecting surface is smaller than that of the sixth connecting surface.

In some embodiments of the lower diaphragm, the first and second flange segments are spaced apart from each other.

In some embodiments of the lower diaphragm, orthographic projections of the first and second fold ring segments on a plane perpendicular to the vibration direction are both U-shaped, and the U-shaped openings are opposite;

a first fold area is formed at the corner of the first fold ring section, and a second fold area is formed at the corner of the second fold ring section.

In order to solve the technical problem, the utility model discloses a technical scheme two be:

a mould is used for manufacturing the lower vibrating diaphragm.

In some embodiments of the mold, the mold includes a molding surface formed with a first recess matching the first flange segment and a second recess matching the second flange segment.

In some embodiments of the mold, the molding surface is further formed with a third groove, and the third groove is annular and is disposed around the outer sides of the first groove and the second groove.

In some embodiments of the mold, the molding surface has a through hole therein, the through hole extending through the mold.

In order to solve the technical problem, the utility model discloses a technical scheme three be:

a loudspeaker comprises a vibration system, a magnetic circuit system and a basin frame, wherein the magnetic circuit system drives the vibration system to vibrate and generate sound, the basin frame is used for fixing the vibration system and the magnetic circuit system, the magnetic circuit system is provided with a magnetic gap, the vibration system comprises a sound film, a voice coil supported on one side, close to the magnetic circuit system, of the sound film, a circuit board fixed on the voice coil and a lower vibrating diaphragm fixed on one side, far away from the sound film, of the voice coil, and one side, far away from the sound film, of the voice coil is inserted into the magnetic gap; the circuit board includes and is in along first direction symmetry the first flexible circuit board and the second flexible circuit board of the relative both sides of voice coil loudspeaker voice coil, the voice coil loudspeaker voice coil with first flexible circuit board electricity is connected, first flexible circuit board with the sound membrane is followed the vibration direction of sound membrane sets up relatively and respectively with the basin frame is connected, the second flexible circuit board with the sound membrane is followed the vibration direction sets up relatively and respectively with the basin frame is connected, the speaker still includes as above-mentioned lower vibrating diaphragm.

In some embodiments of the loudspeaker, the magnetic circuit system comprises a magnetic bowl, a main magnetic steel fixed on the magnetic bowl, and an auxiliary magnetic steel arranged around the main magnetic steel, and the magnetic gap is formed between the main magnetic steel and the auxiliary magnetic steel;

the magnetic circuit system further comprises a main pole core and a clamping plate, the main pole core is located between the main magnetic steel and the sound film and is arranged on the main magnetic steel in an overlapped mode, the clamping plate comprises a fixing piece connected with the basin frame and an auxiliary pole core located on the fixing piece, and the auxiliary pole core is located between the auxiliary magnetic steel and the sound film and is arranged on the auxiliary magnetic steel in an overlapped mode.

In some embodiments of the speaker, the speaker further includes a supporting framework, the supporting framework is erected between the voice coil and the voice diaphragm, and one side of the supporting framework, which is far away from the voice diaphragm, extends along the periphery of the voice coil to form a connecting portion connected with the first flexible circuit board and the second flexible circuit board.

The beneficial effects of the utility model reside in that:

according to the lower vibrating diaphragm, the first folding ring segment and the second folding ring segment with different rigidity are adopted, the first folding ring segment with higher rigidity is opposite to the first flexible circuit board welded with the lead-out line of the voice coil, the voice coil part on one side of the first flexible circuit board is connected with the magnetic circuit system part through the first fixing part and the second fixing part of the first folding ring segment, the rigidity reduction of the first flexible circuit board which becomes soft due to heating caused by alternating current can be compensated, and therefore swinging is restrained.

[ description of the drawings ]

FIG. 1 is a front view of a prior art loudspeaker;

fig. 2 is a schematic structural diagram of the lower diaphragm of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

fig. 5 is a schematic structural view of the mold of the present invention;

FIG. 6 is a cross-sectional view taken along line C-C of FIG. 5;

fig. 7 is a schematic structural diagram of a speaker according to the present invention;

FIG. 8 is a sectional view taken along line D-D of FIG. 7;

fig. 9 is an exploded view of the speaker of fig. 7;

fig. 10 is a stiffness simulation curve of the lower diaphragm of the present invention.

[ detailed description ] embodiments

The present invention will be further described with reference to the accompanying drawings and embodiments.

Please refer to fig. 2 to fig. 9, a description will now be given of a lower diaphragm 600 according to the present invention. A lower diaphragm 600 is arranged on a loudspeaker 10, the loudspeaker 10 comprises a vibration system 100 and a magnetic circuit system 200 for driving the vibration system 100 to vibrate and generate sound, the magnetic circuit system 200 has a magnetic gap 210, the vibration system 100 comprises a voice film 110, a voice coil 120 supported on one side of the voice film 110 close to the magnetic circuit system 200, a circuit board fixed on the voice coil 120 and the lower diaphragm 600 fixed on one side of the voice coil 120 far from the voice film 110. The side of the voice coil 120 remote from the diaphragm 110 is inserted into the magnetic gap 210. The circuit board includes a first flexible circuit board 400 and a second flexible circuit board 500 symmetrically disposed at opposite sides of the voice coil 120 in a first direction. The lead-out wire of the voice coil 120 is soldered to the first flexible circuit board 400. When the speaker 10 operates, the first flexible circuit board 400 becomes soft and less rigid due to heat generation caused by the alternating current. The second flexible circuit board 500 has substantially constant stiffness, and this asymmetry in stiffness during operation causes wobbling. The wobble causes problems of high order, pure tones, etc., thereby affecting the normal use of the speaker 10.

Further, the lower diaphragm 600 includes a first fixing portion 630 fixed to the voice coil 120, a second fixing portion 640 fixed to the magnetic circuit system 200 and spaced from the first fixing portion 630, and a corrugated rim connected between the first fixing portion 630 and the second fixing portion 640. Further, the folding ring includes a first folding ring segment 610 facing the first flexible circuit board 400, and a second folding ring segment 620 facing the second flexible circuit board 500. The stiffness of the first folded ring segment 610 is greater than the stiffness of the second folded ring segment 620. In this embodiment, the first fixing portion 630 and the second fixing portion 640 of the first folded ring segment 610 are connected to the voice coil 120 and the magnetic circuit system 200 through the first flexible circuit board 400, and the first fixing portion 630 and the second fixing portion 640 of the second folded ring segment 620 are connected to the voice coil 120 and the magnetic circuit system 200 through the second flexible circuit board 500. Further, the first direction is perpendicular to the vibration direction of the sound diaphragm 110. The first direction is parallel to the direction indicated by the arrow X in fig. 2, and the vibration direction is parallel to the direction indicated by the arrow Y in fig. 2. In this embodiment, the first folding ring segment 610 protrudes away from the first flexible circuit board 400, and the second folding ring segment 620 protrudes away from the second flexible circuit board 500.

In the lower diaphragm 600, the first and

second gimbal segments

610 and 620 with different rigidities are adopted, the first gimbal segment 610 with higher rigidity faces the first flexible circuit board 400 welded to the outgoing line of the voice coil 120, and the first fixing portion 630 and the second fixing portion 640 of the first gimbal segment 610 connect the voice coil 120 portion located on one side of the first flexible circuit board 400 and the magnetic circuit system 200 portion, so that the rigidity reduction of the first flexible circuit board 400 softened due to heating caused by alternating current can be compensated, and the swing can be suppressed.

Referring to fig. 2 to 4, the first folding ring segment 610 includes a first connecting surface 611 connected to the first fixing portion 630, a second connecting surface 612 connected to the second fixing portion 640, and a third connecting surface 613 connected between the first connecting surface 611 and the second connecting surface 612. The second flap segment 620 includes a fourth connection surface 621 connected with the first fixing portion 630, a fifth connection surface 622 connected with the second fixing portion 640, and a sixth connection surface 623 connected between the fourth connection surface 621 and the fifth connection surface 622. That is, the first connection surface 611 is symmetrical to the fourth connection surface 621, the second connection surface 612 is symmetrical to the fifth connection surface 622, and the third connection surface 613 is symmetrical to the sixth connection surface 623. Further, the curvature of the first connection surface 611 is smaller than that of the fourth connection surface 621, the curvature of the second connection surface 612 is smaller than that of the fifth connection surface 622, and the curvature of the third connection surface 613 is smaller than that of the sixth connection surface 623. The stiffness of the first and second folded

ring segments

610, 620 may be adjusted by changing the curvature of each attachment surface. The rigidity of the first folding ring section 610 is ensured to be larger than that of the second folding ring section 620 by limiting the curvature relation of a group of connecting surfaces with symmetrical positions. Further, in the present embodiment, the first connecting surface 611, the second connecting surface 612, and the third connecting surface 613 are all straight surfaces, and the fourth connecting surface 621, the fifth connecting surface 622, and the sixth connecting surface 623 are all arc surfaces, so that the first folded ring segment 610 has greater rigidity than the second folded ring segment 620.

In this embodiment, the first and second folded

ring segments

610 and 620 are spaced apart. Orthographic projections of the first and second folded

ring segments

610 and 620 on a plane perpendicular to the vibration direction are both in a U shape, and the U-shaped openings are opposite. It is understood that in other embodiments, the orthographic projection may have other shapes, such as a semi-arc, a straight line, or a wave. Further, a first pleat zone 614 is formed at a corner of the first fold ring segment 610, and a second pleat zone 624 is formed at a corner of the second fold ring segment 620. Further, the direction of the protrusions of the pleats in the first and

second pleat zones

614 and 624 is opposite to the direction of the protrusions of the first and second

fold ring segments

610 and 620, i.e. the pleats form grooves in the first and second

fold ring segments

610 and 620, it is understood that in other embodiments, the direction of the protrusions of the pleats is the same as the direction of the protrusions of the first and second

fold ring segments

610 and 620; or in other implementations, a portion of the corrugations may be raised in the same direction as the first/

second fold segments

610, 620, and another portion of the corrugations may be raised in the opposite direction as the first/

second fold segments

610, 620.

Please refer to fig. 5 and fig. 6 together, an embodiment of the present invention further discloses a mold 20, wherein the mold 20 is used for manufacturing the lower diaphragm 600. The mold 20 comprises a molding surface 21, the molding surface 21 is provided with a first groove 211 matched with the first folding ring segment 610 and a second groove 212 matched with the second folding ring segment 620, namely two different folding ring segment models are provided on one pair of molds 20, the original assembly process can not be changed, and a large amount of manpower and material resources are saved. The lower diaphragm 600 can be formed by air pressure blowing, in the processing process of the lower diaphragm 600, the processing material for manufacturing the lower diaphragm 600 is uniformly laid on the forming surface 21, and the processing material is subjected to air explosion forming through an air explosion structure to form the lower diaphragm 600.

Further, the forming surface 21 is further formed with a third groove 213, and the third groove 213 is annular and is annularly disposed outside the first groove 211 and the second groove 212. The third recess 213 can hold more processing materials, and the lower diaphragm 600 semi-manufactured goods that the gas explosion shaping obtained form the strengthening rib in the position that corresponds third recess 213, helps increasing the intensity of lower diaphragm 600 semi-manufactured goods when opening the membrane to prevent lower diaphragm 600 semi-manufactured goods from damaging. Further, the molding surface 21 has a through hole 214, and the through hole 214 penetrates through the mold 20. The through-holes 214 facilitate the introduction of gas for separating the diaphragm blank from the molding surface 21. In this embodiment, a part of the through hole 214 is located in the third groove 213.

Please refer to fig. 2 to 9 together, an embodiment of the present invention further discloses a speaker 10, which includes a vibration system 100, a magnetic circuit 200 for driving the vibration system 100 to vibrate and generate sound, and a frame 300 for fixing the vibration system 100 and the magnetic circuit 200, wherein the magnetic circuit 200 has a magnetic gap 210, and the vibration system 100 includes a diaphragm 110, a voice coil 120 supported on one side of the diaphragm 110 close to the magnetic circuit 200, a circuit board fixed on the voice coil 120, and a lower diaphragm 600 fixed on one side of the voice coil 120 away from the diaphragm 110. The voice coil 120 is formed by winding a conductive wire, and an inlet/outlet wire for conducting electricity to the voice coil 120 is disposed thereon. The side of the voice coil 120 remote from the diaphragm 110 is inserted into the magnetic gap 210. After the voice coil 120 is energized, electromagnetic force is generated between the voice coil and the magnetic circuit system 200 to drive the diaphragm 110 to vibrate. In this embodiment, the voice coil 120 is rectangular.

Further, the circuit board includes a first flexible circuit board 400 and a second flexible circuit board 500 symmetrically disposed at opposite sides of the voice coil 120 along the first direction, and the voice coil 120 is electrically connected to the first flexible circuit board 400.

The first flexible circuit board 400 and the sound diaphragm 110 are oppositely arranged along the vibration direction and are respectively connected with the frame 300, and the second flexible circuit board 500 and the sound diaphragm 110 are oppositely arranged along the vibration direction and are respectively connected with the frame 300. Specifically, the sound diaphragm 110 includes a dome 111 and an upward folding ring 112 annularly disposed on the dome 111, an outer edge of the upward folding ring 112 is provided with a third fixing portion 1121 for fixing the upward folding ring 112, and an inner edge of the upward folding ring 112 is provided with a connecting portion 1122 connected to the dome 111. Specifically, the upper folding ring 112 is connected to the frame 300 through the third fixing portion 1121. Further, the first folding ring segment 610 is disposed on the first flexible circuit board 400 through the first fixing portion 630 and the second fixing portion 640, and the second folding ring segment 620 is disposed on the second flexible circuit board 500 through the first fixing portion 630 and the second fixing portion 640. The first and second folded

ring segments

610 and 620 are disposed opposite to the sound diaphragm 110. The first folding ring segment 610 is located on a side of the first flexible circuit board 400 away from the sound diaphragm 110, and the second folding ring segment 620 is located on a side of the second flexible circuit board 500 away from the sound diaphragm 110.

Further, the magnetic circuit system 200 includes a magnetic bowl 220, a main magnet 230 fixed to the magnetic bowl 220, and a sub magnet 240 surrounding the main magnet 230, wherein a magnetic gap 210 is formed between the main magnet 230 and the sub magnet 240. In this embodiment, the number of the secondary magnetic steels 240 is two and includes two secondary magnetic steels located on two sides of the primary magnetic steel 230, that is, the magnetic circuit system 200 is a three-magnet steel magnetic circuit. Further, the magnetic circuit system 200 further includes a main pole piece 250 and a clamping plate 260. The main pole core 250 is located between the main magnet 230 and the diaphragm 110 and is stacked on the main magnet 230. The clamping plate 260 includes a fixing member 261 connected to the frame 300 and an auxiliary pole core 262 located on the fixing member 261, the fixing member 261 is annular, and the auxiliary pole core 262 is located between the auxiliary magnetic steel 240 and the sound diaphragm 110 and stacked on the auxiliary magnetic steel 240. Specifically, the main magnet 230 and the main pole core 250 are located at the center of the magnet bowl 220. Magnetic conductive pieces 270 are arranged between the main magnet steel 230 and the auxiliary magnet steel 240 and the magnetic bowl 220, between the main magnet steel 230 and the main pole core 250, and between the auxiliary magnet steel 240 and the auxiliary pole core 262. With the above arrangement, the performance of the magnetic circuit system 200 is further improved, and as much magnetic lines of force of the magnetic circuit system 200 as possible are cut by the voice coil 120 to form a larger driving force.

Further, the speaker 10 further includes a support frame 700, and the support frame 700 is disposed between the voice coil 120 and the diaphragm 110. The side of the supporting frame 700 away from the voice coil 110 extends along the outer circumference of the voice coil 120 to form a connection part 701 connected to the first flexible circuit board 400 and the second flexible circuit board 500. Specifically, the support frame 700 is fixed below the dome 111, and the support frame 700 is connected to the voice coil 120 to suspend the voice coil 120 below the diaphragm 110. The support bobbin 700 indirectly connects the voice coil 120 with the first flexible circuit board 400 and the second flexible circuit board 500. The first flexible circuit board 400 and the second flexible circuit board 500 effectively suppress the lateral vibration of the voice coil 120, and improve the reliability and stability of the speaker 10. As shown in fig. 10, by using the first and

second loop segments

610 and 620 having different rigidities and providing the first loop segment 610 having a higher rigidity to the first flexible circuit board 400 welded to the lead-out line of the voice coil 120, it is possible to compensate for a decrease in rigidity of the first flexible circuit board 400 softened by heat generation caused by an alternating current, thereby suppressing sway.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. The lower vibrating diaphragm is arranged on a loudspeaker, the loudspeaker comprises a vibrating system and a magnetic circuit system for driving the vibrating system to vibrate and produce sound, the magnetic circuit system is provided with a magnetic gap, the vibrating system comprises a sound film, a voice coil supported on one side, close to the magnetic circuit system, of the sound film, a circuit board fixed on the voice coil and the lower vibrating diaphragm fixed on one side, away from the sound film, of the voice coil, and one side, away from the sound film, of the voice coil is inserted into the magnetic gap; the circuit board includes along first direction symmetry sets up the first flexible circuit board and the second flexible circuit board of the relative both sides of voice coil loudspeaker voice coil, the lead-out wire of voice coil loudspeaker voice coil with first flexible circuit board welding, its characterized in that: the lower vibrating diaphragm comprises a first fixing part relatively fixed with the voice coil, a second fixing part relatively fixed with the magnetic circuit system and arranged at an interval with the first fixing part, and a folding ring connected between the first fixing part and the second fixing part, the folding ring comprises a first folding ring section just opposite to the first flexible circuit board and a second folding ring section just opposite to the second flexible circuit board, the rigidity of the first folding ring section is greater than that of the second folding ring section, and the first direction is perpendicular to the vibration direction of the voice diaphragm.

2. The lower diaphragm of claim 1, wherein: the first folding ring section comprises a first connecting surface connected with the first fixing part, a second connecting surface connected with the second fixing part and a third connecting surface connected between the first connecting surface and the second connecting surface;

3. The lower diaphragm of claim 2, wherein: the first and second folded ring sections are arranged at intervals.

4. The lower diaphragm of claim 3, wherein: orthographic projections of the first folded ring segment and the second folded ring segment on a plane vertical to the vibration direction are both in a U shape, and U-shaped openings are opposite;

5. A mold, characterized in that: the mold is used for manufacturing the lower diaphragm of any one of claims 1 to 4.

6. The mold of claim 5, wherein: the mould comprises a forming surface, wherein a first groove matched with the first folding ring section and a second groove matched with the second folding ring section are formed in the forming surface.

7. The mold of claim 6, wherein: the forming surface is also provided with a third groove which is annular and is annularly arranged on the outer sides of the first groove and the second groove.

8. The mold of claim 7, wherein: the forming surface is provided with a through hole which penetrates through the die.

9. A loudspeaker, characterized by: the loudspeaker comprises a vibration system, a magnetic circuit system and a basin frame, wherein the magnetic circuit system drives the vibration system to vibrate and generate sound, the basin frame is used for fixing the vibration system and the magnetic circuit system, the magnetic circuit system is provided with a magnetic gap, the vibration system comprises a sound film, a voice coil supported on one side of the sound film, which is close to the magnetic circuit system, a circuit board fixed on the voice coil, and a lower vibrating diaphragm of any one of claims 1-4, which is fixed on one side of the voice coil, which is far away from the sound film, and one side of the voice coil, which is far away from the sound film, is; the circuit board includes along first direction symmetry and sets up the first flexible circuit board and the second flexible circuit board of the relative both sides of voice coil loudspeaker voice coil, the voice coil loudspeaker voice coil with first flexible circuit board electricity is connected, first flexible circuit board with the sound membrane is followed the vibration direction of sound membrane sets up relatively and respectively with the basin frame is connected, the second flexible circuit board with the sound membrane is followed the vibration direction sets up relatively and respectively with the basin frame is connected.

10. The loudspeaker of claim 9, wherein: the magnetic circuit system comprises a magnetic bowl, main magnetic steel fixed on the magnetic bowl and auxiliary magnetic steel annularly arranged on the main magnetic steel, and the magnetic gap is formed between the main magnetic steel and the auxiliary magnetic steel;

11. The loudspeaker of claim 9, wherein: the loudspeaker further comprises a supporting framework, the supporting framework is erected between the voice coil and the voice film, the supporting framework is far away from one side of the voice film, and the periphery of the voice coil extends to form a connecting part connected with the first flexible circuit board and the second flexible circuit board.