CN217389006U - Vibrating diaphragm and miniature loudspeaker - Google Patents

Abstract

The utility model discloses a vibrating diaphragm, which comprises an inner fixed part, a ring bending part and an outer fixed part which are connected in sequence from inside to outside; the edge folding part comprises a plurality of edge folding areas which are sequentially connected from inside to outside, each edge folding area comprises four straight edge sections, every two adjacent straight edge sections are connected through an R angle, at least one group of two adjacent edge folding areas are provided, the width of the R angle of one edge folding area is gradually increased from two ends to the center, and the width of the R angle of the other edge folding area is gradually reduced from two ends to the center. The vibrating diaphragm and the micro loudspeaker have simple and novel structures and are convenient to process and manufacture; through in a set of two adjacent book ring district, only change the width of two continuous straight edge sections, and keep the original width at R angle, can be on satisfying the structure space and dodging, FR etc. acoustics performance's basis, keep the original whole rigidity of vibrating diaphragm as far as possible.

Description

Vibrating diaphragm and miniature loudspeaker

Technical Field

The utility model relates to an electroacoustic transducer technical field especially relates to a vibrating diaphragm and miniature speaker.

Background

With the continuous development of consumer electronics market, the market has higher and higher requirements on micro speakers applied to electronic products, and on one hand, the micro speakers are required to have the advantages of low f0, good low-frequency response and the like; on the other hand, the amplitude is also required to be more symmetrical to facilitate sound effect debugging. The diaphragm is used as a component of a vibration system and plays a vital role in the performance and reliability of the micro-speaker, and the corrugated rim shape of the diaphragm influences the mode of the diaphragm and is a key design parameter of the diaphragm. The small folding rings of the common diaphragm are all equal in width within a circle, when a product has special requirements on structure space avoidance, FR and other acoustic properties, and the small folding rings have to be widened, the width of the large folding ring is correspondingly reduced, so that the integral rigidity of the diaphragm is enhanced, the situation that the symmetry is reduced in Kms is possible, and f0 is higher, the amplitude is asymmetric, and the product performance is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: a vibrating diaphragm with a novel structure and a micro loudspeaker with the vibrating diaphragm are provided.

In order to solve the technical problem, the utility model discloses a technical scheme one is: a vibrating diaphragm comprises an inner fixing part, a folded ring part and an outer fixing part which are sequentially connected from inside to outside; the edge folding part comprises a plurality of edge folding areas which are sequentially connected from inside to outside, each edge folding area comprises four straight edge sections, every two adjacent straight edge sections are connected through an R angle, at least one group of two adjacent edge folding areas are provided, one edge folding area is provided with the R angle, the width of the R angle is gradually increased from the center to two ends, and the other edge folding area is connected with the R angle, and the width of the R angle is gradually reduced from the center to two ends.

Furthermore, in the folded ring area, the widths of the two straight edge sections which are oppositely arranged are equal.

Furthermore, in any two adjacent folded ring areas, the sum of the widths of the two connected R angles is greater than or equal to the sum of the widths of the two connected straight edge sections.

Further, the protruding directions of two adjacent folded ring areas are opposite.

Furthermore, the number of the ring folding areas is two, and the width of a straight edge section of the ring folding area connected with the inner fixing part is larger than that of a straight edge section of the ring folding area connected with the outer fixing part; the width of the R angle of the ring-folded area connected with the inner fixing part is gradually increased from two ends to the center.

In order to solve the technical problem, the utility model discloses a technical scheme two be: the micro loudspeaker comprises a vibration system, wherein the vibration system comprises a vibrating diaphragm and a voice coil arranged on the vibrating diaphragm, and the vibrating diaphragm is the vibrating diaphragm.

The beneficial effects of the utility model reside in that: the vibrating diaphragm and the micro loudspeaker have simple and novel structures and are convenient to process and manufacture; because the R angle has the largest deformation stress, and compared with the straight edge sections, the folded ring at the R angle is changed to be easier to adjust the performance, therefore, the widths of the two connected straight edge sections are changed in a group of two adjacent folded ring areas, and the original width of the R angle is kept as much as possible, so that the original integral rigidity of the vibrating diaphragm can be kept as much as possible on the basis of meeting the acoustic performances of structure space avoidance, FR and the like, and the product performance deterioration caused by asymmetry of Kms can be prevented.

Drawings

Fig. 1 is a schematic view of an overall structure of a diaphragm according to a first embodiment of the present invention;

fig. 2 is a top view of a diaphragm according to a first embodiment of the present invention.

Description of reference numerals:

1. an inner fixing portion;

2. a folded ring part; 21. a loop folding region; 211. a straight side section; 212. an R angle;

3. an outer fixing portion.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 to 2, a diaphragm includes an inner fixing portion 1, a bending portion 2, and an outer fixing portion 3 connected in sequence from inside to outside; the ring folding part 2 comprises a plurality of ring folding areas 21 which are sequentially connected from inside to outside, each ring folding area 21 comprises four straight edge sections 211, every two adjacent straight edge sections 211 are connected through an R angle 212, at least one group of two adjacent ring folding areas 21 are provided, the width of the R angle 212 of one ring folding area 21 is gradually increased from the center to two ends, and the width of the R angle 212 of the other ring folding area 21 connected with the R angle 212 is gradually decreased from the center to two ends.

The utility model discloses a structural principle brief follows as follows: the greater the amount of deformation of the flexure region 21, the less rigid the diaphragm as a whole. Consequently, when needing to satisfy acoustic properties such as structure space dodge, FR, and in a set of two adjacent dog-ear district 21, when the width of the less dog-ear section 211 of dog-ear district 21 of whole width of increase, can make the great dog-ear section 211's of dog-ear district 21 of whole width reduce thereupon originally, will reduce the holistic deformation volume of vibrating diaphragm this moment to improve the whole rigidity of vibrating diaphragm. Since the deformation stress at the R corner 212 is the largest, and the performance of the diaphragm is easier to adjust by changing the width of the R corner 212 relative to the straight section 211, the widths of the R corners 212 of the two folded-ring regions 21 are gradually decreased from two ends to the center until the width of the center of the R corner 212 in the folded-ring region 21 with the original smaller width is equal to the original width (i.e., the width when not increased) of the straight section 211, so that the overall rigidity of the diaphragm can be reduced to a certain extent.

From the above description, the beneficial effects of the present invention are: the vibrating diaphragm and the micro loudspeaker have simple and novel structures and are convenient to process and manufacture; by changing the width of the two straight edge sections 211 connected with each other in a group of two adjacent bending ring areas 21 and keeping the original width of the R angle 212 as much as possible, the original integral rigidity of the vibrating diaphragm can be kept as much as possible on the basis of meeting the acoustic performances of structure space avoidance, FR and the like, so that the product performance is prevented from being poor due to the fact that Kms is asymmetric.

Further, in the ring-folded region 21, the two straight sections 211 oppositely disposed have the same width.

From the above description, it can be known that the widths of the two straight sections 211 oppositely arranged are equal to ensure the symmetry of the whole diaphragm, and prevent the amplitudes of the two sides of the diaphragm from being unequal.

Further, in any two adjacent folded-loop regions 21, the sum of the widths of two connected R corners 212 is greater than or equal to the sum of the widths of two connected straight edge sections 211.

From the above description, it can be known that the setting of the R-angle 212 with a larger width can increase the deformation amount of the corrugated rim region 21 of the diaphragm, which is beneficial to reducing the overall rigidity of the diaphragm, and further improving the symmetry of Kms, and reducing f0, so that the amplitude is more symmetrical.

Further, the protruding directions of two adjacent fold ring areas 21 are opposite.

As can be seen from the above description, the opposite protruding directions of the two adjacent bending ring regions 21 are beneficial to increasing the deformation amount that can be generated by the diaphragm, so that the diaphragm can realize large amplitude.

Further, the number of the ring-folding zones 21 is two, and the width of the straight edge section 211 of the ring-folding zone 21 connected to the inner fixing portion 1 is greater than the width of the straight edge section 211 of the ring-folding zone 21 connected to the outer fixing portion 3; the width of the R-angle 212 connecting the loop region 21 of the inner fixing portion 1 is gradually increased from both ends to the center.

The micro loudspeaker comprises a vibration system, wherein the vibration system comprises a vibrating diaphragm and a voice coil arranged on the vibrating diaphragm, and the vibrating diaphragm is the vibrating diaphragm.

As can be seen from the above description, the ring-folded portion 2 on the diaphragm can be provided with different numbers of ring-folded regions 21 according to the assembly or working requirement of the micro-speaker, and the ring-folded regions 21 can be protruded in different directions according to the requirement.

Example one

Referring to fig. 1 to fig. 2, a first embodiment of the present invention is: a vibrating diaphragm can be widely applied to miniature loudspeakers in portable electronic equipment such as mobile phones, notebook computers, hearing aids and the like.

The local oscillation membrane comprises an inner fixed part 1, a folded ring part 2 and an outer fixed part 3 which are connected in sequence from inside to outside; the ring-folding part 2 comprises a plurality of ring-folding areas 21 which are sequentially connected from inside to outside; the ring-folding zone 21 is rectangular and comprises four straight edge sections 211, two adjacent straight edge sections 211 are connected through an R corner 212, in at least one group of two adjacent ring-folding zones 21, the width of the R corner 212 of one ring-folding zone 21 is gradually increased from the center to two ends, and the width of the R corner 212 of the other ring-folding zone 21 connected with the R corner 212 is gradually decreased from the center to two ends.

In the folded ring area 21, the two straight side sections 211 oppositely arranged have the same width.

Specifically, the diaphragm can be made of PET, PEN, PEI, PI, PEEK, TPEE, aluminum alloy, titanium alloy or paper and other materials; in this embodiment, in the same ring-folded region 21, the four straight sections 211 have the same width, the four R corners 212 have the same size, and the two ends of the R corners 212 have the same width.

As shown in fig. 2, in any two adjacent dog-ear regions 21, the sum of the widths of the two connected R-corners 212 is greater than or equal to the sum of the widths of the two connected straight-side sections 211. Specifically, in the present embodiment, the sum of the widths of the two connected R corners 212 is equal to the sum of the widths of the two connected straight sections 211.

As shown in fig. 1, in order to increase the amplitude that can be generated by the diaphragm, the protruding directions of two adjacent bending ring regions 21 are opposite.

As shown in fig. 2, the number of the ring-folded areas 21 is two, and the width of the straight edge section 211 of the ring-folded area 21 connected to the inner fixing portion 1 is greater than the width of the straight edge section 211 of the ring-folded area 21 connected to the outer fixing portion 3; the width of the R-angle 212 connecting the loop region 21 of the inner fixing portion 1 is gradually increased from both ends to the center. It is easily understood that in other embodiments, the width of the straight edge section 211 connected to the loop folded region 21 of the inner fastening part 1 may be set to be smaller than the width of the straight edge section 211 connected to the loop folded region 21 of the outer fastening part 3.

The embodiment also provides a micro-speaker, which comprises a frame, and a magnetic circuit system and a vibration system which are respectively arranged on the frame, wherein the magnetic circuit system comprises a yoke, and a central magnetic steel and a plurality of side magnetic steels which are arranged on the yoke, and the central magnetic steel is arranged between at least two opposite side magnetic steels; the vibration system comprises the vibrating diaphragm and a voice coil arranged on the vibrating diaphragm, and the voice coil is accommodated in a magnetic gap formed between the central magnetic steel and the side magnetic steel. In order to avoid the vibrating diaphragm from colliding with the magnetic circuit system during vibration, in this embodiment, the folded ring region 21 with the larger width of the straight edge section 211 connected to the inner fixing portion 1 protrudes toward the direction away from the magnetic circuit system.

In summary, the vibrating diaphragm and the micro-speaker provided by the utility model have simple and novel structures, and are convenient to process and manufacture; the width of two straight edge sections connected with each other is changed in a group of two adjacent ring-folding areas, and the original width of an R angle is kept as much as possible, so that the original integral rigidity of the diaphragm can be kept as much as possible on the basis of meeting the acoustic performances of structure space avoidance, FR and the like; the different protruding directions of the adjacent corrugated areas are beneficial to increasing the amplitude which can be generated by the diaphragm; the widths of the straight edge sections which are oppositely arranged are equal, so that the amplitude asymmetry of the two sides of the vibrating diaphragm can be prevented; and the R angle with larger width is beneficial to reducing the integral rigidity of the diaphragm, improving the symmetry of Kms and reducing f 0.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims (6)

1. The utility model provides a vibrating diaphragm, includes interior fixed part, ring bending portion and outer fixed part that from inside to outside links to each other in proper order, its characterized in that: the edge folding part comprises a plurality of edge folding areas which are sequentially connected from inside to outside, each edge folding area comprises four straight edge sections, every two adjacent straight edge sections are connected through an R angle, at least one group of two adjacent edge folding areas are provided, the width of the R angle of one edge folding area is gradually increased from the center to two ends, and the width of the R angle of the other edge folding area is gradually reduced from the center to two ends.

2. The diaphragm of claim 1, wherein: in the ring folding area, the widths of the two straight edge sections which are oppositely arranged are equal.

3. The diaphragm of claim 1, wherein: in any two adjacent folded ring areas, the sum of the widths of the two connected R angles is greater than or equal to the sum of the widths of the two connected straight edge sections.

4. The diaphragm of claim 1, wherein: the protruding directions of two adjacent folded ring areas are opposite.

5. The diaphragm of claim 1, wherein: the number of the ring folding areas is two, and the width of a straight edge section of the ring folding area connected with the inner fixing part is larger than that of a straight edge section of the ring folding area connected with the outer fixing part; the width of the R angle of the ring-folded area connected with the inner fixing part is gradually increased from two ends to the center.

6. Miniature speaker, including vibration system, vibration system includes the vibrating diaphragm and locates voice coil loudspeaker voice coil on the vibrating diaphragm, its characterized in that: the diaphragm is as claimed in any one of claims 1 to 5.

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