WO2020000982A1 - 振膜和扬声器 - Google Patents
振膜和扬声器 Download PDFInfo
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- WO2020000982A1 WO2020000982A1 PCT/CN2018/125336 CN2018125336W WO2020000982A1 WO 2020000982 A1 WO2020000982 A1 WO 2020000982A1 CN 2018125336 W CN2018125336 W CN 2018125336W WO 2020000982 A1 WO2020000982 A1 WO 2020000982A1
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- pattern
- diaphragm
- straight
- straight line
- edge portion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
Definitions
- the invention relates to the technical field of electroacoustics, and in particular to a diaphragm and a speaker.
- the bottom of the depression of the pattern is also prone to stress concentration, which causes the phenomenon of stress concentration.
- the cross-sectional view of the pattern in FIG. 8 along the circumferential direction of the folded ring portion is similar to the two patterns. In the absence of a pattern, the cross-section of the corner region of the folded ring portion will be a straight line or a similar straight line.
- a pattern is set, a plurality of depressions are formed on the straight line of the cross section.
- the final cross section is a half-wave structure composed of a straight line and a depression curve.
- the main purpose of the present invention is to provide a diaphragm, which aims to reduce the stress concentration phenomenon of the diaphragm folded ring portion, and improve the performance reliability and acoustic performance of the speaker.
- the diaphragm provided by the present invention includes an intermediate portion and a protruding folded ring portion surrounding the outer periphery of the intermediate portion.
- the folded ring portion includes a first straight edge portion, a second straight edge portion, and a connection.
- An arc-shaped corner portion of the first straight edge portion and a second straight edge portion, and the arc-shaped corner portion and the ends of the first straight edge portion and the second straight edge portion connected thereto form a corner area; the corner area A pattern is provided on the pattern, and the pattern extends in an undulating wave shape along the surrounding direction of the folded ring portion at the position where the pattern is located.
- the pattern has a plurality of crest lines and trough lines, and the The cross section of the folded ring portion in the circumferential direction is provided as a continuously curved smooth curve, and the smooth curve has a plurality of wave peaks and valleys.
- the smooth curve is a spline curve passing through the crests and troughs.
- the cross-section in the circumferential direction of the folded ring portion is formed by a first straight line segment passing through the first straight edge portion and parallel to the extending direction of the first straight edge portion, and the second straight edge portion.
- a second straight line segment on the side portion and parallel to the extending direction of the second straight edge portion, and a rounded corner portion on the curved corner portion connecting the first straight line segment and the second straight line segment One surface of is cut out, and the radius value of the fillet section is equal to, greater than, or less than the radius value of the inner edge of the curved corner portion.
- the distance between the first straight line segment and the inner side of the first straight edge portion is equal to the distance between the second straight line segment and the inner side of the second straight edge portion.
- all the peaks of the smooth curve are on a straight line, and all the troughs are on a straight line.
- a straight line where all the wave peaks on the smooth curve are parallel to a straight line where all the wave troughs are located.
- the distance between any two adjacent peaks of the smooth curve is equal;
- a curve between an adjacent wave peak and a wave valley on the smooth curve is a center-symmetrical figure.
- the pattern is formed by projecting a reference spline curve located in the corner region along the inside-outside direction of the folded ring portion.
- the reference spline curve is extended along the surrounding direction of the folded ring portion where it is located.
- the reference spline curve has a plurality of peaks and troughs, all peaks of the reference spline curve are on a straight line, all troughs are on a straight line, and the straight line where all the crests are located and the straight line where all the troughs are located Phase parallel.
- the distance between any two adjacent peaks of the reference spline curve is equal;
- the curve between adjacent peaks and troughs on the reference spline curve is a center-symmetrical figure.
- the diaphragm is rectangular, and the folded ring portion includes two opposite first straight edge portions and two opposite second straight edge portions, and the first straight edge portion And the second straight edge portion is connected by the arc-shaped corner portion.
- the peak of the smooth curve is not higher than the convex surface where the first straight edge portion and the second straight edge portion are located.
- a plurality of crest lines of the pattern are gathered toward the inside of the folded ring portion; or a plurality of crest lines of the pattern are gathered toward the outside of the folded ring portion.
- the two patterns located at the two ends of the same diagonal of the diaphragm are symmetrically arranged with respect to the center of the diaphragm.
- the present invention also provides a loudspeaker including a diaphragm including a middle portion and a folded ring portion surrounding an outer periphery of the middle portion.
- the folded ring portion includes a first straight edge portion, a second straight edge portion, and An arc-shaped corner portion connecting the first straight edge portion and the second straight edge portion, and the arc-shaped corner portion and the ends of the first straight edge portion and the second straight edge portion connected thereto form a corner region;
- the corner A pattern is provided on the area, and the pattern extends up and down in a wavy shape along the surrounding direction of the folded ring portion where it is located.
- the pattern has a plurality of crest lines and trough lines, and the pattern follows its position.
- the cross section of the folded ring portion in the circumferential direction is provided as a continuously curved smooth curve, and the smooth curve has a plurality of wave peaks and valleys.
- the pattern because a pattern is provided on a corner region of the folded ring portion of the diaphragm, and the pattern extends in an undulating wave shape along the surrounding direction of the folded ring portion at its position, the pattern has a plurality of crest lines.
- this design not only has the advantages of increasing the strength of the diaphragm, preventing vibration deformation of the diaphragm, and making the diaphragm vibration more stable, but also can reduce the existing common pattern designs by wavy pattern design with a smooth curved section.
- the stress concentration phenomenon can evenly distribute the stress on the diaphragm, thereby reducing the diaphragm breakage and / or layering caused by the stress concentration, and effectively improving the reliability and acoustic performance of the product; at the same time, the design also It can reduce the vibration friction between the patterns when the diaphragm vibrates, which can further improve the reliability and acoustic performance of the product.
- FIG. 1 is an exploded view of an embodiment of a speaker of the present invention
- FIG. 2 is a schematic structural diagram of a diaphragm in FIG. 1;
- FIG. 3 is a schematic cross-sectional view of the pattern on the diaphragm in FIG. 2 along the surrounding direction of the folded ring portion;
- FIG. 4 is a cross-sectional expanded view of the pattern in FIG. 3;
- FIG. 5 is a schematic structural diagram of a diaphragm provided with a double-row pattern in the background art
- FIG. 6 is a schematic structural diagram of a diaphragm with a single row pattern in the background art
- FIG. 7 is a schematic cross-sectional view of the pattern on the diaphragm in FIG. 6 along the circumferential direction of the folded ring portion;
- FIG. 8 is a cross-sectional development view of the single-row pattern in FIG. 7.
- the directional indication is only used to explain in a specific posture (as shown in the accompanying drawings) (Shown) the relative positional relationship and movement of each component, etc., if the specific posture changes, the directivity indication will change accordingly.
- the invention provides a diaphragm and a speaker having the diaphragm.
- the diaphragm 5 includes an intermediate portion 51 and a folded ring portion 52 surrounding the outer periphery of the intermediate portion 51.
- the folded ring portion 52 includes a first straight edge portion 522 and a second The straight edge portion 523 and the arc-shaped corner portion 524 connecting the first straight edge portion 522 and the second straight edge portion 523, the arc-shaped corner portion 524 and the first straight edge portion 522 and the second straight edge portion 523 connected thereto.
- the corner portion 521 constitutes a corner region 521; a pattern 521a is provided on the corner region 521, and the pattern 521a extends up and down in a wavy shape along the surrounding direction of the folded portion 52 at the position where the pattern 521a has a plurality of crest lines and valley lines
- the cross section of the pattern 521a along the circumferential direction of the folded ring portion 52 at the position thereof is provided with a smooth curve 521e that is continuously bent.
- the smooth curve 521e has a plurality of peaks and troughs.
- a speaker generally includes a magnetic circuit system, a vibration system, and a support system.
- the support system includes a casing 1 for receiving a fixed magnetic circuit system and a vibration system.
- the magnetic circuit system usually includes a magnetic yoke 2, a magnet, a magnetic plate, and the like. The magnetic yoke 2 is used to fix the magnet and correct the magnetic field lines.
- the magnet includes a central magnet 31,
- the magnetic plate includes a central magnetically permeable plate 4 provided on a central magnet 31;
- a magnetic yoke 2 is provided with an inner magnetic circuit portion and an outer magnetic circuit portion, between the inner magnetic circuit portion and the outer magnetic circuit portion A magnetic gap is formed.
- the vibration system includes a diaphragm 5 and a voice coil 6, the diaphragm 5 is connected to the side of the voice coil 6 away from the magnetic circuit system, and the other side of the voice coil 6 is suspended in a magnetic gap; the diaphragm 5 generally includes a diaphragm main body 50 And a reinforcing portion 53 for adjusting the acoustic performance, and the diaphragm body 50 generally includes a middle portion 51 and a folded ring portion 52 surrounding the outer periphery of the middle portion 51.
- the speaker further includes a centering support 7 connected to the diaphragm 5 and the voice coil 6 to reduce polarization.
- a pattern 521 b may be generally provided on the folded ring portion 52, for example, 5 to 8, a double-row or single-row pattern 521 b may be provided on the folding ring portion 52.
- the stress concentration phenomenon is easy to occur at the junction of the double-row pattern 521b, especially at the corner.
- the single-row pattern 521b referring to FIG.
- the difference between the straight line segment 521d and the depression curve is large, which results in stress concentration.
- the maximum stress can reach 15-20Mpa. In these regions, stress concentration will cause the reliability of the diaphragm 5 to be affected, and it is easy to break or delaminate. , Which affects the acoustic performance of the speaker; in particular, when the diaphragm 5 is vibrating, the existing pattern design still has a large vibration friction, which may even cause the two patterns to fold in the middle of the middle, which greatly affects the reliability of the product. Performance and acoustic performance.
- a pattern 521a is provided on the corner region 521 of the folded-back ring portion 52 of the diaphragm 5, and the pattern 521a extends in a wave-like manner up and down along the surrounding direction of the folded-back ring portion 52 at its position.
- 521a has a plurality of crest lines and trough lines, and the cross section of the pattern 521a along the circumferential direction of the folded ring portion 52 where it is located is continuously curved with a smooth curve 521e having a plurality of crests and troughs; and the smooth curve 521e is There are tangent lines everywhere, and the tangent line continuously rotates with the movement of the tangent point.
- the stress concentration phenomenon in the design of 521a can evenly distribute the stress on the diaphragm 5, thereby reducing the situation of the diaphragm 5 breaking and / or layering caused by the stress concentration, and effectively improving the reliability and acoustics of the product.
- this design can also reduce the vibration friction between the patterns 521a when the diaphragm 5 vibrates, which can further improve the reliability and acoustic performance of the product.
- the smooth curve 521 e is a spline curve passing through peaks and troughs.
- the cross-section in the circumferential direction of the folded ring portion 52 is composed of a first straight section (not labeled) and a second straight edge section 523 passing through the first straight edge section 522 and parallel to the extending direction of the first straight edge section 522.
- the radius value of the fillet segment is equal to, larger or smaller than the radius value of the inner edge of the arc-shaped corner portion 524.
- the distance of the first straight line segment from the inner side of the first straight side portion is preferably equal to the distance of the second straight line segment from the inner side of the second straight side portion.
- all the peaks of the smooth curve 521e are on a straight line, and all the troughs are on a straight line.
- the straight line where all the wave peaks on the smooth curve 521e and the straight line where all the wave troughs are located is preferably set in parallel. This setting can further reduce the difference between the adjacent parts of the smooth curve 521e in the up-down direction, thereby helping to reduce the stress concentration phenomenon.
- the distance between any two adjacent peaks of the smooth curve 521e is equal; and / or, the distance between any two adjacent valleys of the smooth curve 521e is equal; and / or, any adjacent of the smooth curve 521e
- the distance between the peaks and troughs is equal. Specifically, in this embodiment, it is preferable that the distance between any two adjacent peaks of the smooth curve 521e is equal, and the distance between any two adjacent valleys is also equal. At the same time, the distance between any adjacent peaks and valleys is equal. The distances are also equal. This setting can further reduce the difference between the adjacent portions of the smooth curve 521e in the surrounding direction of the folded-back ring portion 52 along its position, thereby facilitating reducing the stress concentration phenomenon.
- the curve between the adjacent peaks and troughs on the smooth curve 521e is a center-symmetrical pattern. It can be understood that the symmetrical configuration of the shape can further reduce the shape difference of the curve.
- the pattern 521a is formed by projecting a reference spline curve (not labeled) located in the corner region along the inside-outside direction of the folded ring portion.
- the reference spline curve is extended along the surrounding direction of the folded ring portion where it is located.
- the reference spline curve has multiple peaks and troughs, all peaks of the reference spline curve are on a straight line, all troughs are on a straight line, and the straight line where all the crests are located is parallel to the straight line where all the troughs are located.
- the distance between any two adjacent peaks of the reference spline is equal; and / or, the distance between any two adjacent valleys of the reference spline is equal; and / or, any adjacent of the reference spline
- the distance between the peaks and troughs is equal. Specifically in this embodiment, it may be preferred that the distance between any two adjacent peaks of the reference spline curve is equal; at the same time, the distance between any two adjacent valleys is equal; and The distance between them is equal. Further, the curve between the adjacent peaks and troughs on the reference spline curve is a center-symmetrical figure.
- the shape difference of the smooth curve 521e can be further reduced, and a better stress dispersion effect can be achieved, which is conducive to reducing the phenomenon of stress concentration and improving the reliability and acoustic performance of the product.
- the diaphragm 5 is provided in a rectangular shape.
- the folded ring portion 52 of the diaphragm 5 includes two opposite first straight edge portions 522 and two opposite first straight edge portions 522. Two straight edge portions 523. Specifically, in this embodiment, two relatively long edge portions are the first straight edge portion 522, and the other two relatively short edge portions are the second straight edge portion 523.
- the first The straight edge portion 522 and the second straight edge portion 523 are connected by an arc-shaped corner portion 524.
- the folded ring portion 52 is rectangular, and the four corners thereof are arc-shaped corner portions 524.
- the diaphragm 5 when the diaphragm 5 is rectangular, its four arc-shaped corner portions 524 are vibration-susceptible parts, and the provision of the pattern 521a at this part can effectively strengthen the strength there to prevent deformation and make the vibration more stable.
- the pattern 521a in addition to providing the pattern 521a at the curved corner portion 524, the pattern 521a may also be provided in other areas according to the actual vibration of the diaphragm 5, for example, when the first side portion 522 is longer At this time, a pattern 521a for increasing strength may be provided on the first side portion 522.
- the peak of the pattern 521a is not higher than the convex surface where the first straight edge portion 522 and the second straight edge portion 523 are located.
- the The crests are flush with the convex surfaces where the first straight edge portion 522 and the second straight edge portion 523 are located.
- the peaks of the pattern 521a may also protrude from the convex surfaces of the first straight edge portion 522 and the second straight edge portion 523.
- the flat top arrangement in this embodiment is not only conducive to further stress dispersion
- the diaphragm 5 can be more beautiful, and the volume thickness of the diaphragm 5 can be reduced, so that the speaker product can be thinner.
- a plurality of crest lines of the pattern 521a may be gathered toward the inner side of the folded ring portion 52; or a plurality of crest lines of the pattern 521a may be gathered toward the outside of the folded ring portion 52.
- the center lines of the plurality of wave peaks of the pattern 521 a intersect at a point on the inner side of the folded ring portion 52. This shape setting can more adapt to the change of the arc angle of the arc-shaped corner portion 524, which is beneficial to uniform stress dispersion.
- the two patterns 521 a located at both ends of the same diagonal of the diaphragm 5 are symmetrically disposed with respect to the center of the diaphragm 5.
- the patterns 521 a of the four corner regions 521 may be further preferably arranged symmetrically with respect to the center of the diaphragm 5. It can be understood that the symmetrical arrangement of the patterns 521a can make the structure of the diaphragm 5 more balanced, which is conducive to improving the vibration stability.
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Abstract
本发明公开一种振膜及扬声器，其中，该振膜包括中间部以及环绕于所述中间部外周的凸出的折环部，所述折环部包括第一直边部、第二直边部、及连接第一直边部、第二直边部的弧形拐角部，所述弧形拐角部和与之相连的第一直边部、第二直边部的端部构成拐角区域；所述拐角区域上设有花纹，所述花纹沿着其所在位置的折环部的环绕方向成上下起伏的波浪状延伸，所述花纹具有多条波峰线和波谷线，且所述花纹的沿其所在位置的折环部的环绕方向的截面呈连续折弯的光滑曲线设置，所述光滑曲线具有多个波峰和波谷。本发明的技术方案可降低振膜折环部的应力集中现象，提高扬声器的性能可靠性以及声学性能。
Description
本发明涉及电声技术领域，特别涉及一种振膜和扬声器。
目前，随着扬声器，特别是手机smart-pa等的使用发展，扬声器要求能在大振幅的情况下使用并能同时保证性能的可靠性。在扬声器的设计中，振膜的设计十分关键，其设计的好坏对于产品的总谐波失真、听音以及可靠性等影响巨大。然而，在振膜设计时，如果出现应力集中，则容易出现破膜等情况。例如，在目前常见的振膜折环部上设有双排花纹的设计方案中，参考图5，在双排花纹的交接处尤其是最角落位置就容易出现应力集中现象，而在振膜折环部上设有单排花纹的设计方案中，参考图6，在花纹的凹陷底部特别是最角落位置的花纹的凹陷底部也容易出现应力集中现象，造成应力集中现象的原因，参考图7、图8中的花纹的沿折环部的环绕方向的截面图，这两种花纹的截面图类似，在没有花纹的情况下，折环部拐角区域的截面将会是一条直线或类直线，在设置了花纹的情况下，在截面直线上形成了多个凹陷部，最终截面为由直线段和凹陷曲线构成的类似半波结构，直线段和凹陷曲线的差异性较大，因此造成了应力集中现象。在这两种花纹设计的情况下，最大应力可以达到15-20Mpa，在这些区域中，因应力集中会导致振膜该处的可靠性受到影响，而容易出现破膜或分层等情况，从而影响扬声器的声学性能。
发明内容
本发明的主要目的是提供一种振膜，旨在降低振膜折环部的应力集中现象，提高扬声器的性能可靠性以及声学性能。
为实现上述目的，本发明提出的振膜包括中间部以及环绕于所述中间部外周的凸出的折环部，所述折环部包括第一直边部、第二直边部、及连接第一直边部、第二直边部的弧形拐角部，所述弧形拐角部和与之相连的第一直 边部、第二直边部的端部构成拐角区域；所述拐角区域上设有花纹，所述花纹沿着其所在位置的折环部的环绕方向成上下起伏的波浪状延伸，所述花纹具有多条波峰线和波谷线，且所述花纹的沿其所在位置的折环部的环绕方向的截面呈连续折弯的光滑曲线设置，所述光滑曲线具有多个波峰和波谷。
可选地，所述光滑曲线为经过所述波峰和波谷的样条曲线。
可选地，所述沿折环部的环绕方向的截面是由经过所述第一直边部上的且平行于所述第一直边部延伸方向的第一直线段、所述第二直边部上的且平行于所述第二直边部延伸方向的第二直线段、以及所述弧形拐角部上的且连接所述第一直线段与所述第二直线段的圆角段的一个面截出，所述圆角段的半径值等于、大于或小于所述弧形拐角部的内边的半径值。
可选地，所述第一直线段距离所述第一直边部的内边的距离等于所述第二直线段距离所述第二直边部的内边的距离。
可选地，所述光滑曲线的所有波峰在一条直线上，所有波谷在一条直线上。
可选地，所述光滑曲线上的所有波峰所在的直线与所有波谷所在的直线相平行。
可选地，所述光滑曲线的任意相邻的两波峰之间的距离相等；
且/或，所述光滑曲线的任意相邻的两波谷之间的距离相等；
且/或，所述光滑曲线的任意相邻的波峰和波谷之间的距离相等。
可选地，所述光滑曲线上相邻的波峰与波谷之间的曲线为中心对称图形。
可选地，所述花纹是由位于所述拐角区域的一条基准样条曲线沿着所述折环部的内侧-外侧方向投影形成。
可选地，所述基准样条曲线沿其所在位置的所述折环部的环绕方向延伸设置。
可选地，所述基准样条曲线具有多个波峰和波谷，所述基准样条曲线的所有波峰在一条直线上，所有波谷在一条直线上，并且所有波峰所在的直线与所有波谷所在的直线相平行。
可选地，所述基准样条曲线的任意相邻的两波峰之间的距离相等；
且/或，所述基准样条曲线的任意相邻的两波谷之间的距离相等；
且/或，所述基准样条曲线的任意相邻的波峰和波谷之间的距离相等。
可选地，所述基准样条曲线上相邻的波峰与波谷之间的曲线为中心对称图形。
可选地，所述振膜呈矩形，且所述折环部包括两个相对的所述第一直边部、及两个相对的所述第二直边部，所述第一直边部和所述第二直边部通过所述弧形拐角部连接。
可选地，在所述折环部的环绕方向上，所述光滑曲线的波峰不高于所述第一直边部和所述第二直边部所在的凸出面。
可选地，所述花纹的多个波峰线向所述折环部的内侧聚拢；或者，所述花纹的多个波峰线向所述折环部的外侧聚拢。
可选地，位于所述振膜同一对角线两端的两个所述花纹相对于所述振膜的中心呈中心对称设置。
本发明还提出一种扬声器，包括振膜，该振膜包括中间部以及环绕于所述中间部外周的折环部，所述折环部包括第一直边部、第二直边部、及连接第一直边部、第二直边部的弧形拐角部，所述弧形拐角部和与之相连的第一直边部、第二直边部的端部构成拐角区域；所述拐角区域上设有花纹，所述花纹沿着其所在位置的折环部的环绕方向成上下起伏的波浪状延伸，所述花纹具有多条波峰线和波谷线，且所述花纹的沿其所在位置的折环部的环绕方向的截面呈连续折弯的光滑曲线设置，所述光滑曲线具有多个波峰和波谷。
本发明的技术方案中，由于在振膜折环部的拐角区域上设有花纹，且花纹沿着其所在位置的折环部的环绕方向成上下起伏的波浪状延伸，花纹具有多条波峰线和波谷线，且花纹的沿其所在位置的折环部的环绕方向的截面呈连续折弯的具有多个波峰和波谷的光滑曲线设置；而光滑曲线是处处有切线，且切线随切点的移动而连续转动的曲线，整条截面曲线相邻部分之间的差异性小，故折环部拐角区域的应力能够分散在整个花纹区域，不会出现较大的应力集中现象，应力最大处可以降低到5-8Mpa甚至更低。这样，本设计不但具有增强振膜强度、防止振膜振动变形以及使振膜振动更加平稳等优点，还可以通过截面为光滑曲线状的波浪形花纹设计来减小目前常见的花纹设计中存在的应力集中现象，可使应力均匀的分散在振膜上，从而减小因应力集中 导致的振膜破膜及/或分层的情况，有效提高产品的可靠性以及声学性能；同时，本设计还可以减小振膜振动时花纹之间的振动摩擦，从而可进一步提高产品的可靠性以及声学性能。
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本发明扬声器一实施例的爆炸图；
图2为图1中振膜的结构示意图；
图3为图2中振膜上的花纹沿折环部的环绕方向的截面示意图；
图4为图3中花纹的截面展开图；
图5为背景技术中设有双排花纹的振膜的结构示意图；
图6为背景技术中设有单排花纹的振膜的结构示意图；
图7为图6中振膜上的花纹沿折环部的环绕方向的截面示意图；
图8为图7中单排花纹的截面展开图。
附图标号说明：
| 标号 | 名称 | 标号 | 名称 |
| 1 | 外壳 | 2 | 导磁轭 |
| 521e | 光滑曲线 | 31 | 中心磁体 |
| 32 | 边磁体 | 4 | 中心导磁板 |
| 5 | 振膜 | 50 | 振膜主体 |
| 53 | 补强部 | 51 | 中间部 |
| 52 | 折环部 | 521 | 拐角区域 |
| 521a，521b | 花纹 | 522 | 第一直边部 |
| 523 | 第二直边部 | 524 | 弧形拐角部 |
| 6 | 音圈 | 7 | 定心支片 |
| 521c | 凹陷部 | 521d | 直线段 |
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，若本发明实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本发明实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提出一种振膜以及具有该振膜的扬声器。
参照图1至图4，在本发明一实施例中，该振膜5包括中间部51以及环绕于中间部51外周的折环部52，折环部52包括第一直边部522、第二直边部523、及连接第一直边部522、第二直边部523的弧形拐角部524，弧形拐角部524和与之相连的第一直边部522、第二直边部523的端部构成拐角区域521；拐角区域521上设有花纹521a，花纹521a沿着其所在位置的折环部52的环绕方向成上下起伏的波浪状延伸，花纹521a具有多条波峰线和波谷线，且花纹521a的沿其所在位置的折环部52的环绕方向的截面呈连续折弯的光滑曲线521e设置，光滑曲线521e具有多个波峰和波谷。
在此需说明的是，在本实施例中，该振膜5可具体应用于手机的smart-pa中，当然，本发明的技术方案还可适用于耳机或平板电脑的扬声器等产品中。参照图1所示，扬声器通常包括磁路系统、振动系统以及支撑系统。其中，支撑系统包括用以收容固定磁路系统与振动系统的外壳1。磁路系统通常包括导磁轭2、磁体以及导磁板等，导磁轭2用于固定磁体并修正磁力线；具体在本实施例所示的多磁路系统中，磁体包括中心磁体31，导磁板包括设置于中心磁体31上的中心导磁板4；在磁路系统中，导磁轭2上设有内磁路部分和外磁路部分，内磁路部分和外磁路部分之间形成磁隙。振动系统包括振膜5和音圈6，振膜5与音圈6远离磁路系统的一侧连接，音圈6的另一侧则悬设于磁隙内；振膜5通常包括振膜主体50和用以调节声学性能的补强部53，而振膜主体50通常又包括中间部51以及环绕于中间部51外周的折环部52。此外，在本实施例中，扬声器还包括与振膜5及音圈6连接的用以减少偏振现象的定心支片7。
在目前常见的振膜5设计中，为了加强振膜5强度，防止在振动过程中振膜5变形以及使振膜5振动更加平稳，其通常可在折环部52上设置花纹521b，例如，参照图5至图8，可以在折环部52上设置双排或单排花纹521b。然而，在双排花纹521b的设计方案中，在双排花纹521b的交接处尤其是最角落位置就容易出现应力集中现象，而在单排花纹521b的设计方案中，参考图6，在花纹521b的凹陷底部特别是最角落位置的花纹521b的凹陷底部也容易出现应力集中现象。对于造成应力集中现象的原因，参考图7、图8中的花纹521b的沿折环部52的环绕方向的截面图，这两种花纹521b的截面图类似，在没有花纹521b的情况下，折环部52拐角区域521的截面将会是一条直线或类直线，在设置了花纹521b的情况下，在截面直线上形成了多个凹陷部521c，最终截面为由直线段521d和凹陷曲线构成的类似半波结构，直线段521d和凹陷曲线的差异性较大，因此造成了应力集中现象。在这两种花纹521b设计的情况下，最大应力可以达到15-20Mpa，在这些区域中，应力集中就会导致振膜5该处的可靠性受到影响，而容易出现破膜或分层等情况，从而影响扬声器的声学性能；特别地，在振膜5振动时，现有的花纹设计还存在较大的振动摩擦，甚至会导致两个花纹在其中间交界处对折，进而大大影响产品的可靠性和声学性能。
在本实施例中，由于在振膜5折环部52的拐角区域521上设有花纹521a，且花纹521a沿着其所在位置的折环部52的环绕方向成上下起伏的波浪状延伸，花纹521a具有多条波峰线和波谷线，且花纹521a的沿其所在位置的折环部52的环绕方向的截面呈连续折弯的具有多个波峰和波谷的光滑曲线521e设置；而光滑曲线521e是处处有切线，且切线随切点的移动而连续转动的曲线，整条截面曲线相邻部分之间的差异性小，故折环部52拐角区域521的应力能够分在在整个花纹区域，不会出现较大的应力集中现象，应力最大处可以降低到5-8Mpa甚至更低。这样，本设计不但具有增强振膜5的强度、防止振膜5振动变形以及使振膜5振动更加平稳等优点，还可以通过截面为光滑曲线521e状波浪形花纹设计来减小目前常见的花纹521a设计中存在的应力集中现象，可使应力均匀的分散在振膜5上，从而减小因应力集中导致的振膜5破膜及/或分层的情况，有效提高产品的可靠性以及声学性能；同时，本设计还可以减小振膜5振动时花纹521a之间的振动摩擦，从而可进一步提高产品的可靠性以及声学性能。
参照图1至图4，在本实施例中，光滑曲线521e为经过波峰和波谷的样条曲线。其中，沿折环部52的环绕方向的截面是由经过第一直边部522上的且平行于第一直边部522延伸方向的第一直线段(未标示)、第二直边部523上的且平行于第二直边部523延伸方向的第二直线段(未标示)、以及弧形拐角部524上的且连接第一直线段与第二直线段的圆角段(未标示)的一个面截出，圆角段的半径值等于、大于或小于弧形拐角部524的内边的半径值。在此，第一直线段距离第一直边部的内边的距离优选等于第二直线段距离第二直边部的内边的距离。这样，经该截面截取后的光滑曲线就如图3所示，且图3中的光滑曲线521e的截面展开图如图4所示，而具有该光滑曲线设置的花纹就能有效减少应力集中现象，从而提高产品的可靠性以及声学性能。
进一步地，光滑曲线521e的所有波峰在一条直线上，所有波谷在一条直线上。而且，光滑曲线521e上的所有波峰所在的直线与所有波谷所在的直线优选相平行设置。此设置可进一步减小光滑曲线521e相邻部分之间在上下方向上的差异性，从而有利于减小应力集中现象。
进一步地，光滑曲线521e的任意相邻的两波峰之间的距离相等；且/或，光滑曲线521e的任意相邻的两波谷之间的距离相等；且/或，光滑曲线521e 的任意相邻的波峰和波谷之间的距离相等。具体在本实施例中，优选光滑曲线521e的任意相邻的两波峰之间的距离相等，且任意相邻的两波谷之间的距离也相等，同时，任意相邻的波峰和波谷之间的距离也相等。此设置可进一步减小光滑曲线521e相邻部分之间在沿其所在位置的折环部52的环绕方向上的差异性，从而有利于减小应力集中现象。
进一步地，光滑曲线521e上相邻的波峰与波谷之间的曲线为中心对称图形。可以理解，此形状对称设置可使得曲线的形状差异性进一步减小。
进一步地，在本实施例中，花纹521a是由位于拐角区域的一条基准样条曲线(未标示)沿着折环部的内侧-外侧方向投影形成。具体地，基准样条曲线沿其所在位置的折环部的环绕方向延伸设置。而且，基准样条曲线具有多个波峰和波谷，基准样条曲线的所有波峰在一条直线上，所有波谷在一条直线上，并且所有波峰所在的直线与所有波谷所在的直线相平行。基准样条曲线的任意相邻的两波峰之间的距离相等；且/或，基准样条曲线的任意相邻的两波谷之间的距离相等；且/或，基准样条曲线的任意相邻的波峰和波谷之间的距离相等。具体在本实施例中，可优选基准样条曲线的任意相邻的两波峰之间的距离相等；同时，任意相邻的两波谷之间的距离相等；以及，任意相邻的波峰和波谷之间的距离相等。进一步地，基准样条曲线上相邻的波峰与波谷之间的曲线为中心对称图形。可以理解，通过这些形状限定设置，可进一步减小光滑曲线521e的形状差异性，取得更好的应力分散效果，从而有利于减小应力集中现象，提高产品的可靠性以及声学性能。
参照图1和图2，具体地，在本实施例中，振膜5呈矩形设置，该振膜5的折环部52包括包括两个相对的第一直边部522及两个相对的第二直边部523，具体在本实施例中，两个相对的较长的边部为第一直边部522，另外两个相对的较短的边部为第二直边部523，第一直边部522和第二直边部523通过弧形拐角部524连接。换言之，折环部52呈矩形，其四个转角处即为弧形拐角部524。可以理解，当振膜5呈矩形时，其四个弧形拐角部524是振动易损部位，在该部位设置花纹521a可以有效加强该处的强度，以防止变形并可使振动更加平稳。当然，于其他实施例中，除了在弧形拐角部524处设置花纹521a之外，还可以根据振膜5实际的振动情况，在其他区域设置花纹521a，例如，当第一边部522较长时，在第一边部522上也可以设置用以增加强度 的花纹521a。
进一步地，在折环部52的环绕方向上，花纹521a的波峰不高于第一直边部522和第二直边部523所在的凸出面，特别地，在本实施例中，花纹521a的波峰与第一直边部522和第二直边部523所在的凸出面相平齐设置。当然，于其他实施例中，花纹521a的波峰也可以凸出于第一直边部522和第二直边部523的凸出面，但本实施例中顶端平齐的设置不但有利于应力进一步分散，而且可使振膜5更美观，并可以减少振膜5的体积厚度，使扬声器产品得以更加薄型化。
进一步地，花纹521a的多个波峰线可以呈向折环部52的内侧聚拢；或者，花纹521a的多个波峰线向折环部52的外侧聚拢。优选地，参照图2和图3，在本实施例中，花纹521a的多个波峰的中心线相交于折环部52的内侧一点。此形状设置可以更加适应弧形拐角部524的弧形角度变化，有利于应力分散均匀。
如图2所示，当振膜5呈矩形时，位于振膜5同一对角线两端的两个花纹521a相对于振膜5的中心呈中心对称设置。进一步地，四个拐角区域521的花纹521a可进一步优选均相对于振膜5的中心呈中心对称设置。可以理解，花纹521a对称设置可使振膜5结构更加平衡，从而有利于提高振动稳定性。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。
Claims (18)
- 一种振膜，包括中间部以及环绕于所述中间部外周的凸出的折环部，其特征在于，所述折环部包括第一直边部、第二直边部、及连接第一直边部和第二直边部的弧形拐角部，所述弧形拐角部和与之相连的第一直边部、第二直边部的端部构成拐角区域；所述拐角区域上设有花纹，所述花纹沿着其所在位置的折环部的环绕方向成上下起伏的波浪状延伸，所述花纹具有多条波峰线和波谷线，且所述花纹的沿其所在位置的折环部的环绕方向的截面呈连续折弯的光滑曲线设置，所述光滑曲线具有多个波峰和波谷。
- 如权利要求1所述的振膜，其特征在于，所述光滑曲线为经过所述波峰和波谷的样条曲线。
- 如权利要求1所述的振膜，其特征在于，所述沿折环部的环绕方向的截面是由经过所述第一直边部上的且平行于所述第一直边部延伸方向的第一直线段、所述第二直边部上的且平行于所述第二直边部延伸方向的第二直线段、以及所述弧形拐角部上的且连接所述第一直线段与所述第二直线段的圆角段的一个面截出，所述圆角段的半径值等于、大于或小于所述弧形拐角部的内边的半径值。
- 如权利要求3所述的振膜，其特征在于，所述第一直线段距离所述第一直边部的内边的距离等于所述第二直线段距离所述第二直边部的内边的距离。
- 如权利要求1至4任一所述的振膜，其特征在于，所述光滑曲线的所有波峰在一条直线上，所有波谷在一条直线上。
- 如权利要求5所述的振膜，其特征在于，所述光滑曲线上的所有波峰所在的直线与所有波谷所在的直线相平行。
- 如权利要求1至4任一所述的振膜，其特征在于，所述光滑曲线的任意相邻的两波峰之间的距离相等；且/或，所述光滑曲线的任意相邻的两波谷之间的距离相等；且/或，所述光滑曲线的任意相邻的波峰和波谷之间的距离相等。
- 如权利要求1至4任一所述的振膜，其特征在于，所述光滑曲线上相邻的波峰与波谷之间的曲线为中心对称图形。
- 如权利要求1至4任一所述的振膜，其特征在于，所述花纹是由位于所述拐角区域的一条基准样条曲线沿着所述折环部的内侧-外侧方向投影形成。
- 如权利要求9所述的振膜，其特征在于，所述基准样条曲线沿其所在位置的所述折环部的环绕方向延伸设置。
- 如权利要求9所述的振膜，其特征在于，所述基准样条曲线具有多个波峰和波谷，所述基准样条曲线的所有波峰在一条直线上，所有波谷在一条直线上，并且所有波峰所在的直线与所有波谷所在的直线相平行。
- 如权利要求9所述的振膜，其特征在于，所述基准样条曲线的任意相邻的两波峰之间的距离相等；且/或，所述基准样条曲线的任意相邻的两波谷之间的距离相等；且/或，所述基准样条曲线的任意相邻的波峰和波谷之间的距离相等。
- 如权利要求9所述的振膜，其特征在于，所述基准样条曲线上相邻的波峰与波谷之间的曲线为中心对称图形。
- 如权利要求1所述的振膜，其特征在于，所述振膜呈矩形，且所述折环部包括两个相对的所述第一直边部、及两个相对的所述第二直边部，所 述第一直边部和所述第二直边部通过所述弧形拐角部连接。
- 如权利要求1所述的振膜，其特征在于，在所述折环部的环绕方向上，所述光滑曲线的波峰不高于所述第一直边部和所述直第二边部所在的凸出面。
- 如权利要求1所述的振膜，其特征在于，所述花纹的多个波峰线向所述折环部的内侧聚拢；或者，所述花纹的多个波峰线向所述折环部的外侧聚拢。
- 如权利要求14所述的振膜，其特征在于，位于所述振膜同一对角线两端的两个所述花纹相对于所述振膜的中心呈中心对称设置。
- 一种扬声器，其特征在于，包括如权利要求1至17任意一项所述的振膜。
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| CN201810685142.4 | 2018-06-27 | ||
| CN201810685142.4A CN108900955B (zh) | 2018-06-27 | 2018-06-27 | 振膜和扬声器 |
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| CN108900955B (zh) * | 2018-06-27 | 2021-02-05 | 歌尔股份有限公司 | 振膜和扬声器 |
| WO2021134189A1 (zh) * | 2019-12-30 | 2021-07-08 | 瑞声声学科技(深圳)有限公司 | 振膜及发声器件 |
| CN111065023A (zh) * | 2019-12-30 | 2020-04-24 | 歌尔科技有限公司 | 振膜和扬声器 |
| CN111935616B (zh) * | 2020-06-30 | 2022-03-29 | 瑞声新能源发展(常州)有限公司科教城分公司 | 发声器件 |
| CN111935608B (zh) * | 2020-06-30 | 2022-03-01 | 瑞声新能源发展(常州)有限公司科教城分公司 | 一种扬声器 |
| CN112261550B (zh) * | 2020-09-29 | 2021-10-19 | 瑞声新能源发展(常州)有限公司科教城分公司 | 辅助振膜及发声器件 |
| CN112995859B (zh) * | 2021-02-23 | 2022-12-23 | 歌尔微电子股份有限公司 | 振膜、传感器芯片和传感器 |
| CN114554365B (zh) * | 2022-02-22 | 2024-10-01 | 深圳羽声电子有限公司 | 一种弹波振动膜 |
| CN114928807B (zh) * | 2022-03-23 | 2025-12-12 | 深圳市冠旭电子股份有限公司 | 一种音膜及其扬声器 |
| CN116939439A (zh) * | 2022-08-20 | 2023-10-24 | 深圳市韶音科技有限公司 | 一种振动组件 |
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| US10129652B2 (en) * | 2014-09-12 | 2018-11-13 | Apple Inc. | Audio speaker surround geometry for improved pistonic motion |
| CN205847559U (zh) * | 2016-05-26 | 2016-12-28 | 瑞声科技(新加坡)有限公司 | 微型发声器 |
| CN207075077U (zh) * | 2017-08-10 | 2018-03-06 | 歌尔科技有限公司 | 振膜及电声转换器 |
| CN108012224B (zh) * | 2017-12-29 | 2023-11-21 | 歌尔股份有限公司 | 一种振膜及电声转换器 |
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| JP2008048300A (ja) * | 2006-08-21 | 2008-02-28 | Matsushita Electric Ind Co Ltd | スピーカとそれに用いられるスピーカ用エッジ |
| CN101695145A (zh) * | 2009-09-24 | 2010-04-14 | 无锡杰夫电声有限公司 | 薄型扬声器音盆 |
| CN105554643A (zh) * | 2015-11-19 | 2016-05-04 | 瑞声光电科技(常州)有限公司 | 音膜及具有该音膜的发声器 |
| CN108900955A (zh) * | 2018-06-27 | 2018-11-27 | 歌尔股份有限公司 | 振膜和扬声器 |
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