CN211531307U - Loudspeaker - Google Patents

Abstract

The utility model provides a loudspeaker, which comprises a magnetic circuit system and a vibration system, wherein the magnetic circuit system comprises an upper magnetic yoke, a lower magnetic yoke, and a main magnetic steel and an auxiliary magnetic steel which are oppositely arranged to form a magnetic gap and are fixedly connected with the lower magnetic yoke; the vibration system comprises an upper membrane and a voice coil which drives the upper membrane and is inserted into the magnetic gap; the upper magnetic yoke is connected with one side of the auxiliary magnetic steel, which is far away from the lower magnetic yoke, and a magnetic ring is arranged between the upper film and the upper magnetic yoke; the magnetic ring further comprises a first supporting part connected with one side of the upper membrane surface and the lower magnetic yoke, and a positioning part connected with one side of the upper magnetic yoke far away from the lower magnetic yoke. The magnetic ring and the upper magnetic yoke are matched to optimize the magnetic field around the voice coil, so that the electric coupling factor of a magnetic circuit is optimized, the sound pressure level of the loudspeaker is further improved, and the acoustic performance of the loudspeaker is improved.

Description

Loudspeaker

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic apparatus technical field especially relates to a speaker.

[ background of the invention ]

At present, the miniaturization of the speaker of the mobile phone is getting more, the components in the speaker are simplified as much as possible on the basis of ensuring the performance, and the best performance is realized by the simplest structure. The loudspeaker produces the magnetic field through the clearance between main magnet steel and the vice magnet steel, thereby the voice coil loudspeaker voice coil changes the electric current size in the magnetic field and makes self vibration to with vibration transmission vibrating diaphragm sound production, the vibrating diaphragm is glued on the yoke again through the steel loop location usually. The acoustic effect of speaker is influenced by sound pressure level SPL, sound pressure level SPL is influenced by electromechanical coupling factor BL, and magnetic circuit of magnetic field is the important factor that influences electric coupling factor BL, consequently except main magnet steel and vice magnet steel in the speaker, still there is the magnetic conduction board, the lower yoke, magnetism spare such as supplementary magnet steel is optimized magnetic field, however the steel ring of fixed vibrating diaphragm does not have magnetic field, can't promote the acoustic performance of speaker, also there is the banding supplementary magnet steel of veneer between steel ring and the voice coil loudspeaker voice coil in order to optimize the magnetic circuit environment of speaker, but there are steel ring and supplementary magnet steel simultaneously not only to increase manufacturing cost and production processes, and promoted the weight of speaker, and banding supplementary magnet steel encircles the steel ring setting and is difficult to guarantee the product uniformity in the veneer process.

Therefore, there is a need for a speaker that optimizes the internal magnetic field while reducing the production cost and simplifying the production process.

[ summary of the invention ]

An object of the utility model is to provide a loudspeaker aims at solving reduction in production cost and the problem of simplifying production technology when optimizing inside magnetic field.

The technical scheme of the utility model as follows: a loudspeaker comprises a magnetic circuit system and a vibration system; the magnetic circuit system comprises an upper magnetic yoke, a lower magnetic yoke, and main magnetic steel and auxiliary magnetic steel which are oppositely arranged to form a magnetic gap and fixedly connected with the lower magnetic yoke; the vibration system comprises a voice coil arranged in the magnetic gap and an upper membrane contacted with the voice coil; the upper magnetic yoke is connected with one side of the auxiliary magnetic steel, which is far away from the lower magnetic yoke, and a magnetic ring is arranged between the upper film and the upper magnetic yoke; the magnetic ring further comprises a first supporting part connected with one side of the upper membrane surface and the lower magnetic yoke, and a positioning part connected with one side of the upper magnetic yoke far away from the lower magnetic yoke.

In the above technical solution, the first supporting portion extends from the positioning portion to the upper film direction and forms a step.

In the above technical scheme, the cross section of the magnetic ring is rectangular.

In the above technical scheme, the first supporting part and the upper film are further provided with a glue layer, and the magnetic ring and the upper film are fixed through the glue layer.

In the above technical solution, the upper membrane includes a vibrating diaphragm and a dome, the vibrating diaphragm includes a second supporting portion, a vibrating portion and a bending portion connected between the second supporting portion and the vibrating portion, the second supporting portion is glued with the first supporting portion of the magnetic ring, and the vibrating portion is connected with the voice coil.

In the above technical solution, the auxiliary magnet includes a first auxiliary magnet respectively disposed at the side end of the main magnet in the major axis direction and a second auxiliary magnet respectively disposed at the side end of the main magnet in the minor axis direction; the upper yoke comprises a first peripheral frame part in the long axis direction, a second peripheral frame part in the short axis direction and a connecting rod extending inwards from the second peripheral frame part; the first peripheral frame portion is connected with the first auxiliary magnetic steel, and the connecting rod is connected with the second auxiliary magnetic steel.

In the above technical solution, the vibration system further includes a flexible circuit board and an auxiliary diaphragm; the flexible circuit board comprises a frame portion connected with one side, close to the lower magnetic yoke, of the second peripheral frame portion of the upper magnetic yoke and a conductive terminal connected with the frame portion and extending towards the voice coil to be connected with the side end, far away from the upper film, of the voice coil, and the auxiliary vibrating diaphragm comprises a fixing portion connected with one side, facing the lower magnetic yoke, of the frame portion, a connecting portion connected with one side, facing the lower magnetic yoke, of the conductive terminal, and a vibration sounding portion connected between the fixing portion and the connecting portion.

In the above technical scheme, the lower magnetic yoke includes with the fixed bottom that links to each other of magnetic circuit, and extend from the bottom and with the linking arm that the upper magnetic yoke links to each other, the vice magnet steel side of second with the first circumference frame portion of upper magnetic yoke all is provided with the card and establishes the draw-in groove of linking arm.

In the above technical solution, the magnetic circuit system further includes a magnetic conductive sheet, and the magnetic conductive sheet is attached to one side of the main magnetic steel, which is far away from the lower magnetic yoke.

The beneficial effects of the utility model reside in that: through set up the magnetic ring between last membrane and last yoke, the magnetic ring cooperatees with last yoke and optimizes the magnetic field around the voice coil loudspeaker voice coil to optimize the electric coupling factor of magnetic circuit, and then promote the sound pressure level of speaker, simultaneously, will go up the mould and fix mutually with last yoke through first supporting part and locating part, reduced manufacturing cost and simplified production technology.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of a speaker according to the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at C;

FIG. 4 is a schematic cross-sectional view taken along line B-B in FIG. 1;

FIG. 5 is an enlarged view of a portion of FIG. 4 at D;

fig. 6 is a schematic diagram of a vibrating diaphragm dome-magnetic ring phase separation structure of the speaker of the present invention;

fig. 7 is an exploded view of the speaker according to the present invention;

fig. 8 is a schematic side view of the magnetic ring structure of the present invention;

fig. 9 is another schematic view of the magnetic ring structure of the present invention;

fig. 10 is a block diagram of the speaker according to the present invention.

[ detailed description ] embodiments

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

Referring to fig. 1 and 8, the present embodiment provides a speaker including a magnetic circuit system 20 and a vibration system 30;

specifically, the magnetic circuit system 20 includes an upper magnetic yoke 26, a lower magnetic yoke 24, a main magnetic steel 21 and an auxiliary magnetic steel 22, the main magnetic steel 21 and the auxiliary magnetic steel 22 are oppositely disposed to form a magnetic gap, the main magnetic steel 21 and the auxiliary magnetic steel 22 are fixed on the lower magnetic yoke 24, the upper magnetic yoke 26 and the lower magnetic yoke 24 simultaneously play a role in supporting and fixing the main magnetic steel 21 and the auxiliary magnetic steel 22, optimizing a magnetic gap magnetic field between the main magnetic steel 21 and the auxiliary magnetic steel 22, and restricting outward diffusion of magnetic gap leakage flux to improve the acoustic performance of the loudspeaker 100.

Specifically, the vibration system 30 includes a voice coil 31 and an upper membrane 32, the voice coil 31 is inserted into a magnetic gap formed by the opposing arrangement of the main magnet 21 and the auxiliary magnet 22, and the voice coil 31 drives the upper membrane 32; the loudspeaker 100 generates a magnetic field through the internal magnetic circuit system 20, and the voice coil 31 is electrified in the magnetic field to induce vibration, and the vibration finally acts on the push of the upper membrane 32 to the air medium to generate sound in an acoustic sense.

Specifically, the voice coil 31 has a ring structure adapted to the shape of the main magnet 21, the magnetic field lines of the magnetic field pass through the voice coil 31, when the voice coil 31 is energized, the voice coil 31 vibrates according to the principle of electromagnetic induction, and the vibration of the voice coil 31 is transmitted to the external air medium through the upper membrane 32 disposed in contact therewith, thereby generating sound.

In this embodiment, referring to fig. 5, the secondary magnetic steel 22 includes a first secondary magnetic steel 221 and a second secondary magnetic steel 222, the first secondary magnetic steel 221 is disposed at a long-axis direction side end of the primary magnetic steel 21, and the second secondary magnetic steel 222 is disposed at a short-axis direction side end of the primary magnetic steel 21; the first auxiliary magnetic steel 221 is two parallel magnetic steels, and the second auxiliary magnetic steel 222 is two parallel magnetic steels; the upper yoke 26 includes a first peripheral frame portion 261, a second peripheral frame portion 262, and a connecting rod 263, the first peripheral frame portion 261 is located in the long axis direction of the upper yoke 26, the second peripheral frame portion 262 is located in the short axis direction of the upper yoke 26, and the connecting rod 263 extends inward from the second peripheral frame portion 262; the first peripheral frame portion 261 is connected to the first sub-magnetic steel 21, and the connection rod 263 is connected to the second sub-magnetic steel 222, so that the two relatively parallel first sub-magnetic steels 221 and the two relatively parallel second sub-magnetic steels 222 form four strip-shaped magnetic steels oppositely arranged around the main magnetic steel 21, the voice coil is arranged between the main magnetic steel 21 and the four first sub-magnetic steels 221 and the four second sub-magnetic steels 222 arranged around the main magnetic steel 21, a magnetic gap formed between the main magnetic steel 21 and the sub-magnetic steel 22 acts on the voice coil 31, and when a variable current is passed through the voice coil 31, the voice coil 31 vibrates in the magnetic gap.

Preferably, the upper magnetic yoke 26 is connected to one side of the auxiliary magnetic steel 22 away from the lower magnetic yoke 24, the auxiliary magnetic steel 22 is fixed between the upper magnetic yoke 26 and the lower magnetic yoke 24, the magnetic ring 33 is arranged between the upper membrane 32 and the upper magnetic yoke 26, and the magnetic ring plays a supporting role, optimizes a magnetic field around the voice coil through the magnetic field of the magnetic ring, and improves an electric coupling factor BL of the magnetic circuit, so as to improve a sound pressure level SPL of the speaker 100, so as to achieve a purpose of improving an acoustic performance of the speaker 100, and improve the acoustic performance of the speaker while connecting the upper membrane and the upper magnetic yoke.

Specifically, the sound pressure level SPL of the speaker 100 refers to a sound pressure generated by the speaker at a point 1m away from the speaker on the reference axis when the speaker is energized with a voltage of an electric power of a rated impedance of 1W, and is affected by the electromechanical coupling factor BL, which is determined by the value of the magnetic path Bg and the effective length L of the voice coil 31, so that the sound pressure level of the speaker 100 can be raised by optimizing the value of the magnetic path Bg of the magnetic field without changing the effective length of the voice coil 31.

Specifically, the magnetic ring 33 further includes a first supporting portion 331 and a positioning portion 332, the first supporting portion 331 is connected to a side of the upper film 32 facing the lower magnetic yoke 24, the positioning portion is connected to a side of the upper yoke 26 away from the lower yoke 24, and the magnetic ring serves to fix the upper membrane 32 to the upper yoke 26 through the first supporting portion 331 and the positioning portion 332, and since the diaphragm 32 is a vibrating medium, in order to achieve a better sound-emitting effect, the periphery of the magnetic ring is required to be tightly fixed on the rigid piece, in the embodiment, the magnetic ring 33 is made of permanent magnetic material, for example, the super-hardness permanent magnetic alloy made of common alnico can also be the magnetic steel with other components such as ferrite magnetic steel, neodymium iron boron magnetic steel, sintered neodymium iron boron, bonded neodymium iron boron and the like, when the internal magnetic field of the loudspeaker is optimized, the structure strength is high, and the upper membrane is fixed by the magnetic ring to form stable vibration.

Specifically, the magnetic ring 33 has a ring-shaped structure, and the cross-sectional shape thereof may be a common band-shaped body having a rectangular outer contour, a band-shaped body having a circular outer contour, or other band-shaped bodies adapted to the shape of the upper film 32. In this embodiment, the cross section of the magnetic ring is rectangular, and the meaning of the annular structure is that a configuration space is provided for other components in the speaker 100 to flow out, so as to pass through the magnetic field generated by the main magnetic steel 21 and the auxiliary magnetic steel 22, and the magnetic ring 33 mainly serves as the auxiliary magnetic steel to optimize the magnetic field.

Referring to fig. 2, the voice coil 31 is located in the constrained space defined by the annular structure of the magnetic ring 33, and since the voice coil 31 is located in the magnetic gap between the main magnetic steel 21 and the auxiliary magnetic steel 22, when the voice coil 31 is located in the constrained space defined by the annular structure of the magnetic ring 33, the magnetic flux emitted from the magnetic ring 33 can effectively act on the magnetic field formed by the main magnetic steel 21 and the auxiliary magnetic steel 22, so as to optimize the Bg value of the magnetic circuit, and improve the acoustic performance of the speaker 100.

Specifically, the upper membrane 32 is generally composed of a diaphragm 321 and a dome 322, but different speaker 100 products may be different, and a generalized explanation is used herein, and the upper membrane 32 is regarded as a vibrating piece having a medium characteristic of the diaphragm 321 and directly contacts with the voice coil 31, and an implementation form of the upper membrane 32 is specifically disclosed in this embodiment, but the implementation form cannot be regarded as a limitation to the protection scope of the present invention.

Further, referring to fig. 2, the upper membrane 32 is disposed on a side of the upper yoke 26 away from the lower yoke, it is understood that other structural members may be disposed therebetween, and the upper membrane 32 mainly functions to receive the vibration of the voice coil 31 and interact with the air medium by the characteristics of the medium of the diaphragm 321 itself, thereby generating sound.

Further, referring to fig. 3, the magnetic ring 33 is fixed to the upper film 32 via a glue layer 34. The upper membrane 32 is glued and fixed along the outer contour of the magnetic ring 33, and the magnetic ring 33 is an integrally formed part, so that higher concentricity can be ensured, the upper membrane 32 glued with the magnetic ring can keep good product consistency, and the acoustic stability of the loudspeaker 100 is effectively ensured.

Specifically, referring to fig. 4, the diaphragm 321 includes a second supporting portion 3211, a corrugated portion 3212, and a vibrating portion 3213, and the second supporting portion 3211 is glued to the positioning portion 332 of the magnetic ring 33, so that the diaphragm medium on the diaphragm 321 is fixed and sufficiently extended on the positioning portion 332, and the structural strength during the vibrating process is ensured. The vibrating portion 3213 is glued to the dome 322, the corrugated portion 3212 is connected between the second supporting portion 3211 and the vibrating portion 3213, the magnetic ring 33 is further provided with a step 333, and the step 333 extends and is formed in the first supporting portion 331 from the positioning portion 332 toward the upper film 32, so as to leave a large enough space gap between the magnetic ring 33 and the upper film 32, avoid interference caused by contact between the magnetic ring 33 and the diaphragm 321, and improve the working stability of the vibrating system 30.

Specifically, referring to fig. 5, the vibration system 30 further includes a flexible circuit board 35 and an auxiliary diaphragm 36; the flexible circuit board 35 includes a frame portion 351 connected to a side of the second peripheral frame portion 262 of the upper yoke 26 close to the lower yoke 24, and a conductive terminal 352 connected to the frame portion 351, wherein the conductive terminal 352 extends toward the voice coil 31, so that the conductive terminal 352 is connected to a side end of the voice coil 31 away from the upper film 32, and the flexible circuit board 35 serves to support the voice coil 31 and simultaneously introduce current to the voice coil 31 through the conductive terminal. The auxiliary diaphragm 36 includes a fixing portion 361, a connecting portion 362 and a vibration sound-generating portion 363, the fixing portion 361 is connected to one side of the frame portion 351 facing the lower yoke 24, the connecting portion 362 is connected to one side of the conductive terminal 352 facing the lower yoke 24, the vibration sound-generating portion 363 is connected between the fixing portion 361 and the connecting portion 362, the auxiliary diaphragm 36 releases vibration transmitted to the flexible circuit board 35 via the voice coil 31, the flexible circuit board 35 is protected, the product life is prolonged, at the same time, a magnetic circuit of the magnetic ring 33 acts on the auxiliary diaphragm 36 through a magnetic gap, and the acoustic performance of the speaker 100 is improved by matching with the vibration of the upper diaphragm 32.

Specifically, the magnetic circuit system 20 further includes a magnetic conductive sheet 23, the magnetic conductive sheet 23 is attached to one side of the main magnetic steel 21 close to the dome 322, the magnetic conductive sheet 23 and the main magnetic steel 21 are together sleeved in the annular structure of the voice coil 31, and the magnetic ring 33 further optimizes and reinforces the magnetic circuit of the main magnetic steel 21 optimized by the magnetic conductive sheet 23, so that the current of the voice coil 31 can obtain a stable magnetic field effect, and further obtains stable vibration, so as to improve the performance of the whole product.

Specifically, the lower yoke 24 includes a bottom portion 241 and a connecting arm 242, the bottom portion 241 is fixedly connected to the magnetic circuit system 20, and plays a role of supporting the whole speaker, the connecting arm 242 extends from the bottom portion 241 and is connected to the upper yoke 26, the side end of the second sub-magnetic steel 222 and the first peripheral frame portion 261 of the upper yoke 26 are both provided with a clamping groove 25 for clamping the connecting arm, and the lower yoke 24 fixes the second sub-magnetic steel 222 between the upper yoke 26 and the lower yoke 24 through the clamping groove 25.

Therefore, the utility model discloses a set up the magnetic ring between upper diaphragm and last yoke, the magnetic ring cooperatees with last yoke and optimizes the magnetic field around the voice coil loudspeaker voice coil to optimize the electric coupling factor of magnetic circuit, and then promote the sound pressure level of speaker, simultaneously, will go up the mould and fix mutually with last yoke through supporting part and locating part, reduced manufacturing cost and simplified production technology.

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 (9)

1. A loudspeaker comprises a magnetic circuit system and a vibration system, and is characterized in that the magnetic circuit system comprises an upper magnetic yoke, a lower magnetic yoke, and a main magnetic steel and an auxiliary magnetic steel which are oppositely arranged to form a magnetic gap and fixedly connected with the lower magnetic yoke; the vibration system comprises an upper membrane and a voice coil which drives the upper membrane and is inserted into the magnetic gap; the upper magnetic yoke is connected with one side of the auxiliary magnetic steel, which is far away from the lower magnetic yoke, and a magnetic ring is arranged between the upper film and the upper magnetic yoke; the magnetic ring further comprises a first supporting part connected with one side of the upper membrane surface and the lower magnetic yoke, and a positioning part connected with one side of the upper magnetic yoke far away from the lower magnetic yoke.

2. The speaker of claim 1, wherein the first support portion extends from the positioning portion toward the upper membrane and forms a step.

3. A loudspeaker as claimed in claim 2, wherein the magnetic ring is rectangular in cross-section.

4. A loudspeaker as claimed in claim 2, characterized in that a glue layer is provided between the first support part of the magnetic ring and the upper membrane, and the magnetic ring and the upper membrane are fixed by the glue layer.

5. The loudspeaker of claim 2, wherein the upper membrane comprises a diaphragm and a dome, the diaphragm comprises a second support portion, a vibrating portion, and a bellows portion connected between the second support portion and the vibrating portion, the second support portion is glued to the first support portion of the magnetic ring, and the vibrating portion is connected to the voice coil.

6. The speaker of claim 1, wherein the sub magnetic steels include a first sub magnetic steel disposed at the side end of the main magnetic steel in the major axis direction and a second sub magnetic steel disposed at the side end of the main magnetic steel in the minor axis direction; the upper yoke comprises a first peripheral frame part in the long axis direction, a second peripheral frame part in the short axis direction and a connecting rod extending inwards from the second peripheral frame part; the first peripheral frame portion is connected with the first auxiliary magnetic steel, and the connecting rod is connected with the second auxiliary magnetic steel.

7. The loudspeaker of claim 6, wherein the vibration system further comprises a flexible circuit board and an auxiliary diaphragm; the flexible circuit board comprises a frame portion connected with one side, close to the lower magnetic yoke, of the second peripheral frame portion of the upper magnetic yoke and a conductive terminal connected with the frame portion and extending towards the voice coil to be connected with the side end, far away from the upper film, of the voice coil, and the auxiliary vibrating diaphragm comprises a fixing portion connected with one side, facing the lower magnetic yoke, of the frame portion, a connecting portion connected with one side, facing the lower magnetic yoke, of the conductive terminal, and a vibration sounding portion connected between the fixing portion and the connecting portion.

8. The loudspeaker of claim 7, wherein the lower yoke comprises a bottom portion fixedly connected to the magnetic circuit system, and a connecting arm extending from the bottom portion and connected to the upper yoke, and the second secondary magnetic steel side end and the first peripheral frame portion of the upper yoke are each provided with a slot for engaging the connecting arm.

9. The loudspeaker of claim 6, wherein the magnetic circuit further comprises a magnetic conductive plate attached to a side of the main magnetic steel away from the lower yoke.

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