WO2019218494A1 - 一种动铁受话器 - Google Patents

一种动铁受话器 Download PDF

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Publication number
WO2019218494A1
WO2019218494A1 PCT/CN2018/098939 CN2018098939W WO2019218494A1 WO 2019218494 A1 WO2019218494 A1 WO 2019218494A1 CN 2018098939 W CN2018098939 W CN 2018098939W WO 2019218494 A1 WO2019218494 A1 WO 2019218494A1
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WO
WIPO (PCT)
Prior art keywords
moving iron
diaphragm
iron
neodymium iron
receiver according
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PCT/CN2018/098939
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English (en)
French (fr)
Inventor
陈斌
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深圳倍声声学技术有限公司
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Application filed by 深圳倍声声学技术有限公司 filed Critical 深圳倍声声学技术有限公司
Publication of WO2019218494A1 publication Critical patent/WO2019218494A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/04—Microphones

Definitions

  • the present application relates to the field of receiver technologies, and in particular, to a moving iron receiver.
  • the moving iron receiver also known as the moving iron horn, is a sounding component. It is designed on the basis of the reed speaker, and it uses high-precision micro-machining technology. Through the miniaturization of parts and the adoption of new materials, it maintains its high acoustic-electric conversion rate and overcomes the frequency and distortion of acoustic-electric conversion. Big deficiency. Due to its small size, low power consumption and high output, it is widely used in hearing aids, covert communication, high-fidelity headphones and other fields.
  • the existing moving iron receiver mainly comprises a casing composed of an upper casing and a lower casing, a motor assembly and a diaphragm assembly, and the motor assembly generally comprises a closed annular iron, received and fixed in the same. Two pieces of magnet.
  • the existing bismuth iron is closed in a ring shape to form a ring-shaped magnetic circuit.
  • the slab-shaped samarium iron raw material is generally cut by a slow wire-cutting process.
  • the ferroniobium raw material in the middle of the closed annular ferroniobium after cutting cannot continue to be closed.
  • the manufacture of the ferroniobium is waste, so that the manufacturing cost of the ferroniobium is high, and the manufacturing cost of the moving iron receiver is high.
  • the magnetic permeability of the prior art is achieved by designing the ferroniobium which is closed in a ring shape as a flat ferroniobium, and forming an annular closed magnetic circuit by the ferritic iron and the lower casing.
  • the cost of ferroniobium is greatly reduced.
  • the inventors have found in the embodiment of the present application that the flat-shaped neodymium iron is clamped and fixed by the upper casing and the lower casing, but the problem of lateral positioning of the flat-plated ferroniobium has not been solved.
  • the present application provides a moving iron receiver including a laterally positioned ferroniobium.
  • the embodiment of the present application discloses the following technical solutions, and provides a moving iron receiver, including:
  • the housing includes an upper housing and a lower housing, the upper housing and the lower housing being fastened to each other to form a receiving space, and one of the upper housing and the lower housing extends to the other Holding department
  • the motor assembly is included in the receiving space, the motor assembly includes a neodymium iron, the neodymium iron is in the form of a flat plate, and an outer side of the neodymium iron is provided with a card slot, and the neodymium iron is located in the upper casing and the Between the lower casings, the card slot receives the latching portion for positioning the stellite.
  • the neodymium iron includes a main body portion, two extending portions extending from a side of the main body portion, and the number of the card slots is two, respectively disposed on the two extending portions.
  • the number of the holding portions is also set to two correspondingly.
  • the main body portion is provided with a notch, the notch and the extending portion are located on opposite sides of the main body portion, and one of the upper casing and the lower casing is to another The limiting portion is extended, and the limiting portion is received in the missing slot.
  • the motor assembly further includes two permanent magnets, the neodymium iron and the lower casing form an annular closed magnetic circuit, and the cymbal and the lower casing are enclosed to form an accommodating space.
  • Two permanent magnets are received in the accommodating space, one of the two permanent magnets is fixed on the lower casing, and the other of the two permanent magnets is attached and fixed to the stellite The lower surface.
  • the motor assembly further includes a reed, the reed includes a vibrating portion and a fixing portion disposed in parallel and at intervals, and a connecting portion connecting the vibrating portion and the fixing portion, the vibrating portion is suspended
  • the fixing portion is fitted and fixed to the upper surface of the ferritic iron between the two permanent magnets.
  • the connecting portion is located between the two extensions.
  • the moving iron receiver further includes a diaphragm assembly and a connecting rod received in the receiving space, the diaphragm assembly is located above the neodymium iron, and one end of the connecting rod is fixed to the vibrating portion The other end is fixed to the diaphragm assembly through the slot.
  • the diaphragm assembly comprises a diaphragm holder of an annular structure, a side wall of the upper housing is provided with a card protrusion, and the card protrusion is located above the diaphragm holder for holding the fixing
  • the diaphragm holder is described.
  • the diaphragm assembly further includes a film and a diaphragm, the film is located above the diaphragm holder, and the film has a protrusion extending away from the ferrule, and the protrusion is one end A semi-enclosed structure of the opening, the diaphragm being located within the projection.
  • a first through hole is defined in one end of the film, and a second through hole is disposed at a position corresponding to the first through hole on the vibration piece, the first through hole and the second through hole Used to connect to the connecting rod.
  • one of the upper casing and the lower casing of the present application extends to the other with a retaining portion, and the outer side of the stellite iron is provided with a card slot, and the stellite is located on the upper Between the housing and the lower housing, the card slot receives the latching portion, realizing the lateral positioning of the ferroniobium, and reducing the accuracy of assembling the jig when assembling the ferroniobium, The production cost and production efficiency of the moving iron receiver are improved.
  • FIG. 1 is an exploded perspective view of a moving iron receiver provided by one embodiment of the present application.
  • Figure 2 is a perspective cross-sectional view of the moving iron receiver provided by one embodiment
  • Figure 3 is a perspective view of the upper housing of the moving iron receiver provided by one embodiment
  • Figure 4 is a perspective view of the lower housing of the moving iron receiver provided by one embodiment
  • Figure 5 is a perspective view of a motor assembly of the moving iron receiver provided by one embodiment
  • Figure 6 is a perspective view of the ferroniobium of the moving iron receiver provided by one embodiment
  • Figure 7 is an exploded perspective view of a diaphragm assembly of the moving iron receiver provided by an embodiment.
  • Moving iron receiver 100 Housing 1 Upper housing 11 First substrate 110 First side wall 111 Second side wall 112 Holding portion 113 Limiting portion 114 Card convex 115 Lower housing 12 Second substrate 120 Third side wall 121 Fourth side wall 122 Containing space 13 Motor assembly 2 ⁇ 21 Main body 210 Extension 211 Card slot 212 Missing slot 213
  • a moving iron receiver 100 provided in one embodiment of the present application includes a housing 1, a motor assembly 2, a diaphragm assembly 3, and a connecting rod 4.
  • the housing 1 includes an upper housing 11 and a lower housing 12, and the upper housing 11 and the lower housing 12 are fastened to each other to form the motor assembly 2 and the diaphragm.
  • the upper housing 11 includes a first base 110, two first side walls 111, and two second side walls 112.
  • the two first sidewalls 111 extend from the first base 110 toward the lower casing 12
  • the two second sidewalls 112 extend from the first base 110 to the lower casing 12 .
  • the two first sidewalls 111 are parallel and oppositely disposed, and the two second sidewalls 112 are parallel and oppositely disposed.
  • the length of the first sidewall 111 is greater than that of the second sidewall 112. The length is such that the upper casing 11 is substantially a rectangular parallelepiped that is open at one end.
  • the body 12 extends with a limiting portion 114.
  • a card protrusion 115 extending from an inner side of the second side wall 112 is formed.
  • the upper case 11 is made of a metal material, and the upper case 11 is formed by a stretching process, and the card protrusion 115 is formed by a stamping process. Molded.
  • the lower casing 12 includes a second base body 120, two third side walls 121, and two fourth side walls 122.
  • the two third side walls 121 extend from the second base body 120 toward the first base body.
  • the two third sidewalls 121 extend from the second base 120 toward the first base 110, and the two third sidewalls 121 are oppositely disposed.
  • the sidewalls 122 are oppositely disposed, and the length of the third sidewall 121 is greater than the length of the fourth sidewall 122 such that the lower casing 12 is a rectangular parallelepiped having an opening at one end.
  • the lower casing 12 is made of an iron-nickel alloy material by a drawing process.
  • the motor assembly 2 includes a neodymium iron 21, two permanent magnets 23, a reed 25, and a coil 24.
  • the sill-iron 21 is in the form of a flat plate, and includes two main portions 210, two extending portions 211 extending from one side of the main body portion 210, and two extending portions 211 are provided with two card slots 212.
  • the card slot 212 accommodates the latching portion 113 of the upper casing 11, and the neodymium iron 21 is clamped and positioned by the upper casing 11 and the lower casing 12 in the up-and-down direction. The engagement of the card slot 212 and the latching portion 113 achieves lateral positioning of the neodymium iron 21.
  • the main body portion 210 is provided with a notch 213 extending through the upper surface and the lower surface of the main body portion 210, and the notch 213 and the extending portion 211 are respectively located on opposite sides of the main body portion 210, The limiting portion 114 is received in the notch 213 to further laterally position the neodymium iron 21 .
  • the ferroniobium 21 is made of the same iron-nickel alloy material as the lower casing 12 by a stamping process, and the ferritic iron 21 is combined with the two third side walls 121 and the second base body 120 to form an accommodating space 22,
  • the neodymium iron 21 and the third side wall 121 and the second base body 120 together form a closed loop magnetic circuit, which is used to replace the magnetic circuit formed by the ferroniobium 21 with a closed loop structure in the prior art.
  • the flat-shaped neodymium iron 21 has a simple structure, is easy to manufacture, and reduces the manufacturing cost of the neodymium iron 21; on the other hand, the overall height of the moving iron receiver 100 is lowered, which is advantageous for the moving iron receiver.
  • the development of the thinning of 100 has improved the market competitiveness of the moving iron receiver 100.
  • the two permanent magnets 23 are received in the accommodating space 22, and one of the two permanent magnets 23 is fixed on the second base 120, and the other of the two magnets is fixed to the On the lower surface of the neodymium iron 21, a stable magnetic circuit is formed between the two permanent magnets 23.
  • the two permanent magnets 23 are located in a closed annular magnetic circuit formed by the neodymium iron 21, the third side wall 121 and the second base 120, so that the magnetic circuit formed by the two permanent magnets 23 It has been strengthened.
  • the coil 24 has an annular structure, and a through hole is disposed in the middle of the coil 24.
  • the coil 24 is located on one side of the two permanent magnets 23.
  • the coil 24 is a carrier of current.
  • the reed 25 includes a vibrating portion 251, a fixing portion 250, and a connecting portion 252 connecting the vibrating portion 251 and the fixing portion 250, and the vibrating portion 251 is suspended through the through hole of the coil 24 Between the two permanent magnets 23, the fixing portion 250 is fitted and fixed to the upper surface of the neodymium iron 21, and the connecting portion 252 is located between the two extension portions 211 of the neodymium iron 21, the spring When the sheet 25 is in a silent state, the vibrating portion 251 and the fixing portion 250 are substantially parallel.
  • the width of the vibrating portion 251 is the same as the width of the connecting portion 252, and the width of the fixing portion 250 is first the same as the width of the connecting portion 252, and then gradually becomes larger from the direction away from the connecting portion 252, and finally The width of the connecting portion 252 remains unchanged.
  • the reed 25 is made of a material having high magnetic permeability, such as an alloy material composed of nickel (Ni, Nickel), niobium (Nb, Niobium), carbon (C, carbon) and iron (Fe, Ferrum), which is stamped. The bending process is formed by molding.
  • the diaphragm assembly 3 is located above the neodymium iron 21 between the neodymium iron 21 and the first base body 110.
  • the diaphragm assembly 3 includes a diaphragm holder 31, a membrane 32 and a diaphragm 33.
  • the diaphragm holder 31 is an annular rectangular structure having an opening in the middle, and the diaphragm holder 31 is for supporting the film 32 and the diaphragm 33, between the diaphragms and the upper casing 11
  • the first side wall 111 and the second side wall 112 are fixed.
  • the film 32 has a protrusion 321 extending away from the yoke 21, and the protrusion 321 is a semi-enclosed structure having an opening at one end, and the film 32 is provided with a first through hole 322, the first pass A hole 322 is located on the other end of the film 32 opposite to the opening of the protrusion 321 , and the film 32 is located above the diaphragm holder 31 and is located on the upper housing 11 Below.
  • the film 32 may be a polyester film 32, a silica film 32, etc., when a film 32 having better temperature characteristics is used, the film 32 can be directly passed through a reflow soldering apparatus during the production process of the moving iron receiver 100.
  • the automated production level of the moving iron receiver 100 further increases the production efficiency of the moving iron receiver 100.
  • the diaphragm 33 is located in the protrusion 321 of the film 32, and a second through hole 331 is defined in the diaphragm 33 at a position corresponding to the first through hole 322.
  • the diaphragm 33 has a uniform thickness and can achieve better effects in acoustic consistency, sound pressure, and the like.
  • the diaphragm 33 is made of aluminum-magnesium alloy, stainless steel or nickel, and the rigidity of the diaphragm 33 made of aluminum-magnesium alloy, stainless steel or nickel is better than that of the conventional diaphragm 33 made of aluminum. It is also more prominent in terms of ductility.
  • the diaphragm 33 may also be made of other metals, alloys, ceramics or new materials.
  • One end of the connecting rod 4 is fixed to the vibrating portion 251 of the reed 25, and the other end of the connecting rod 4 passes through the notch 213 of the neodymium iron 21 and passes through the first through hole 322 and the The through holes are connected to the film 32 and the diaphragm 33, respectively.
  • the holding portion 113 can be disposed on the lower casing 12, specifically, from the upper surface of the third sidewall 121 of the lower casing 12.
  • the housing 11 is extended, and the number of the latching portion 113 and the card slot 212 can also be adjusted as appropriate, such as four, six, eight or other even numbers.
  • the limiting portion 114 may also be disposed on the lower casing 12, specifically, the fourth sidewall 122 extends toward the upper casing 11 to make.
  • the vibrating portion 251 of the reed 25 When no audio current flows through the coil 24, the vibrating portion 251 of the reed 25 is in an equilibrium state in a constant magnetic field provided by the two permanent magnets 23; when an alternating current is passed through the coil 24, the coil 24 is generated by a varying current.
  • the varying Lorentz force, the vibrating portion 251 reciprocates under the driving of the Lorentz force, and the film 32 and the diaphragm 33 of the diaphragm assembly 3 are driven by the connecting rod 4 to reciprocate and vibrate to generate an acoustic wave, thereby completing the electrical signal to the acoustic signal. Conversion.
  • One of the upper case 11 and the lower case 12 of the present application extends to the other with a latching portion 113.
  • the outer side of the neodymium iron 21 is provided with a card slot 212, and the neodymium iron 21 is located at the Between the upper casing 11 and the lower casing 12, the card slot 212 accommodates the latching portion 113, which realizes the lateral positioning of the stellite iron 21, and reduces assembly when the stellite 21 is assembled.
  • the accuracy requirement of the jig increases the production cost and production efficiency of the moving iron receiver 100;
  • the neodymium iron 21 has a flat structure, and on the one hand, the structure of the neodymium iron 21 is simple, easy to manufacture, and the crucible is reduced. On the other hand, the overall height of the moving iron receiver 100 is lowered, which contributes to the development of the thinning of the moving iron receiver 100, and improves the market competitiveness of the moving iron receiver 100.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

本申请实施例涉及受话器领域，提供了一种动铁受话器，所述动铁受话器包括：壳体，所述壳体包括上壳体和下壳体，所述上壳体和下壳体相互扣合形成收容空间，所述上壳体和下壳体中的一个向另一个延伸有卡持部；马达组件，收容于所述收容空间，所述马达组件包括锷铁，所述锷铁呈平板状，所述锷铁的外侧设置有卡槽，所述锷铁位于所述上壳体和所述下壳体之间，所述卡槽收容所述卡持部，实现了所述锷铁的侧向定位，降低了装配所述锷铁时对装配治具的精度的要求，提高了所述动铁受话器的生产成本和生产效率。

Description

一种动铁受话器 技术领域
本申请涉及受话器技术领域，尤其涉及一种动铁受话器。
背景技术
动铁式受话器，又称动铁喇叭，是一种发声元件。其在舌簧扬声器的基础上进行设计，发挥高精度微细加工技术，通过零件的微型化和新型材料的采用，保持了其声电转换率高的特性，并且克服了声电转换频响及失真大的不足。由于其体积小、低功耗、高输出等特点，被广泛应用于助听器、隐蔽通信、高保真耳机等领域。
现有的动铁受话器主要包括由上壳体和下壳体构成的壳体、马达组件和振膜组件，所述马达组件一般包括呈封闭环形的锷铁、收容且固定于所述锷铁内的两片磁体。现有的锷铁呈封闭环形，从而形成一个环形的导磁回路。制造所述封闭环形的锷铁时，一般采用板状的锷铁原料通过慢走丝工艺切割制得，一方面，切割后的所述封闭环形的锷铁中间的锷铁原料无法继续进行封闭环形的锷铁的制造而成为废料，使得所述锷铁的制造成本较高，进而使得所述动铁受话器的制造成本较高。
因此，通过将呈环形封闭的锷铁设计为平板状的锷铁，通过锷铁与下壳体合围形成一个环形封闭的导磁回路，实现了现有技术中的导磁作用，且使得所述锷铁的成本大大降低。
然而，发明人在实现本申请实施例中发现，上述平板状的锷铁通过上壳体和下壳体进行夹持固定，但所述平板状的锷铁的侧向定位的问题并未解决。
发明内容
为了解决动铁受话器中的锷铁侧向定位的问题，本申请提供了一种包含侧向定位的锷铁的动铁受话器。
本申请实施例公开了以下技术方案，提供了一种动铁受话器，包括：
壳体，所述壳体包括上壳体和下壳体，所述上壳体和下壳体相互扣合形成收容空间，所述上壳体和下壳体中的一个向另一个延伸有卡持部；
马达组件，收容于所述收容空间，所述马达组件包括锷铁，所述锷铁呈平板状，所述锷铁的外侧设置有卡槽，所述锷铁位于所述上壳体和所述下壳体之间，所述卡槽收容所述卡持部，用以定位所述锷铁。
可选的，所述锷铁包括主体部，自所述主体部的一侧相对间隔延伸的两个延伸部，所述卡槽的数量为两个，分别设于所述两个延伸部上，所述卡持部的数量也相对应的设置为两个。
可选的，所述主体部上设置有缺槽，所述缺槽与所述延伸部位于所述主体部的相对两侧，所述上壳体和所述下壳体中的一个向另一个延伸有限位部，所述限位部收容于所述缺槽。
可选的，所述马达组件还包括两片永磁体，所述锷铁和所述下壳体构成环形封闭的导磁回路，所述锷铁和所述下壳体合围形成容置空间，所述两片永磁体收容于所述容置空间，所述两片永磁体中的一个固定于所述下壳体上，所述两片永磁体中的另一个贴合且固定于所述锷铁的下表面。
可选的，所述马达组件还包括簧片，所述簧片包括平行且间隔设置的振动部和固定部，以及连接所述振动部和所述固定部的连接部，所述振动部悬空于所述两片永磁体之间，所述固定部贴合且固定于所述锷铁的上表面。
可选的，所述连接部位于所述两个延伸部之间。
可选的，所述动铁受话器还包括收容于所述收容空间的振膜组件和连杆，所述振膜组件位于所述锷铁的上方，所述连杆的一端固定于所述振动部上，另一端穿过所述缺槽固定于所述振膜组件上。
可选的，所述振膜组件包括环状结构的振膜支架，所述上壳体的侧壁设置有卡凸，所述卡凸位于所述振膜支架的上方，用于卡持固定所述振膜支架。
可选的，所述振膜组件还包括薄膜和振片，所述薄膜位于所述振膜支架的上方，所述薄膜朝远离所述锷铁的方向延伸有凸起，所述凸起为 一端开口的半包围结构，所述振片位于所述凸起内。
可选的，所述薄膜的一端开设有第一通孔，所述振片上与所述第一通孔对应的位置设有第二通孔，所述第一通孔与所述第二通孔用于与连杆连接。
与现有技术相比，本申请的所述上壳体和下壳体中的一个向另一个延伸有卡持部，所述锷铁的外侧设置有卡槽，所述锷铁位于所述上壳体和所述下壳体之间，所述卡槽收容所述卡持部，实现了所述锷铁的侧向定位，降低了装配所述锷铁时对装配治具的精度的要求，提高了所述动铁受话器的生产成本和生产效率。
附图说明
一个或多个实施例通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定，附图中具有相同参考数字标号的元件表示为类似的元件，除非有特别申明，附图中的图不构成比例限制。
图1是本申请其中一实施例提供的动铁受话器的立体分解图；
图2是其中一实施例提供的所述动铁受话器的立体剖视图；
图3是其中一实施例提供的所述动铁受话器的上壳体的立体图；
图4是其中一实施例提供的所述动铁受话器的下壳体的立体图；
图5是其中一实施例提供的所述动铁受话器的马达组件的立体图；
图6是其中一实施例提供的所述动铁受话器的锷铁的立体图；
图7是其中一实施例提供的所述动铁受话器的振膜组件的的立体分解图。
具体实施方式的附图标号说明：
动铁受话器100 壳体1 上壳体11 第一基体110
第一侧壁111 第二侧壁112 卡持部113 限位部114
卡凸115 下壳体12 第二基体120 第三侧壁121
第四侧壁122 收容空间13 马达组件2 锷铁21
主体部210 延伸部211 卡槽212 缺槽213
容置空间22 永磁体23 线圈24 簧片25
振动部251 固定部250 连接部252 振膜组件3
振膜支架31 薄膜32 凸起321 第一通孔322
振片33 第二通孔331 连杆4  
具体实施方式
为了便于理解本申请，下面结合附图和具体实施例，对本申请进行更详细的说明。需要说明的是，当元件被表述“固定于”另一个元件，它可以直接在另一个元件上、或者其间可以存在一个或多个居中的元件。当一个元件被表述“卡扣”另一个元件，它可以是直接卡扣到另一个元件、或者其间可以存在一个或多个居中的元件。本说明书所使用的术语“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本说明书所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是用于限制本申请。本说明书所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
如图所示，为本申请其中一实施例提供的动铁受话器100，所述动铁受话器100包括壳体1、马达组件2、振膜组件3和连杆4。
如图所示，所述壳体1包括上壳体11和下壳体12，所述上壳体11和所述下壳体12相互扣合，形成收容所述马达组件2、所述振膜组件3和所述连杆4的收容空间13。
所述上壳体11包括第一基体110、两个第一侧壁111和两个第二侧壁112。所述两个第一侧壁111自所述第一基体110向所述下壳体12延伸而成，所述两个第二侧壁112自所述第一基体110向所述下壳体12延伸而成，所述两个第一侧壁111平行且相对设置，所述两个第二侧壁112平行且相对设置，所述第一侧壁111的长度大于所述第二侧壁112的长度，使得上壳体11大致呈一端开口的长方体。
自所述两个第一侧壁111的下表面朝所述下壳体12延伸有两个卡 持部113，自所述两个第二侧壁112中的一个的下表面朝所述下壳体12延伸有一个限位部114。自所述第二侧壁112的内侧延伸有卡凸115，所述上壳体11由金属材料制得，所述上壳体11由拉伸工艺成型制得，所述卡凸115由冲压工艺成型制得。
所述下壳体12包括第二基体120、两个第三侧壁121和两个第四侧壁122，所述两个第三侧壁121自所述第二基体120向所述第一基体110延伸而成，所述两个第三侧壁121自所述第二基体120向所述第一基体110延伸而成，所述两个第三侧壁121相对设置，所述两个第四侧壁122相对设置，所述第三侧壁121的长度大于所述第四侧壁122的长度，使得所述下壳体12为一端开口的长方体。所述下壳体12由铁镍合金材料采用拉伸工艺成型制得。
如图所示，所述马达组件2包括锷铁21、两片永磁体23、簧片25和线圈24。
所述锷铁21呈平板状，包括主体部210，自所述主体部210的一侧相对间隔延伸的两个延伸部211，所述两个延伸部211上设置有两个卡槽212，所述卡槽212收容所述上壳体11的卡持部113，在上下方向上，所述锷铁21被所述上壳体11和所述下壳体12所述夹持定位，通过所述卡槽212和所述卡持部113的配合，从而实现了所述锷铁21的侧向定位。所述主体部210上设置有贯穿所述主体部210的上表面和下表面的缺槽213，所述缺槽213与所述延伸部211分别位于所述主体部210的相对两侧，所述限位部114收容于所述缺槽213，从而进一步对所述锷铁21进行侧向定位。
所述锷铁21由与所述下壳体12相同的铁镍合金材料采用冲压工艺制得，所述锷铁21与两个第三侧壁121、第二基体120合围形成容置空间22，所述锷铁21与所述第三侧壁121、第二基体120共同构成一个封闭环形的导磁回路，用以替代现有技术中通过采用封闭环形结构的锷铁21构成的导磁回路，一方面，平板状的锷铁21结构简单，易于制造成型，降低了所述锷铁21的制造成本；另一方面，降低了所述动铁受话器100的整体高度，有利于所述动铁受话器100的薄型化的发展，提 高了所述动铁受话器100的市场竞争力。
所述两片永磁体23收容于所述容置空间22，所述两片永磁体23中的一个固定于所述第二基体120上，所述两片用磁体中的另一个固定于所述锷铁21的下表面，所述两片永磁体23之间形成一个稳定的磁路。所述两片永磁体23位于所述锷铁21、所述第三侧壁121和所述第二基体120形成的封闭环形的导磁回路中，使得所述两片永磁体23形成的磁路得以加强。
所述线圈24为环状结构，所述线圈24的中间设置有通孔，所述线圈24位于所述两片永磁体23的一侧，所述线圈24为电流的载体。
所述簧片25包括振动部251、固定部250和连接所述振动部251和所述固定部250的连接部252，所述振动部251穿过所述线圈24的通孔而悬空于所述两片永磁体23之间，所述固定部250贴合且固定于所述锷铁21的上表面，所述连接部252位于所述锷铁21的两个延伸部211之间，所述簧片25在静默状态下时，所述振动部251和所述固定部250大致平行。所述振动部251的宽度与所述连接部252的宽度相同，所述固定部250的宽度先和所述连接部252的宽度相同，然后自远离所述连接部252的方向逐渐变大，最后所述连接部252的宽度保持不变。所述簧片25由高导磁率的材料制得，譬如由镍(Ni，Nickel)、铌(Nb，Niobium)、碳(C，carbon)和铁(Fe，Ferrum)组成的合金材料，采用冲压折弯工艺成型制得。
所述振膜组件3位于所述锷铁21的上方，位于所述锷铁21和所述第一基体110之间，所述振膜组件3包括振膜支架31、薄膜32和振片33。
所述振膜支架31为中间为开口的环状矩形结构，所述振膜支架31用于支撑所述薄膜32和所述振片33，所述振膜之间和所述上壳体11的第一侧壁111和所述第二侧壁112相固定。
所述薄膜32朝远离所述锷铁21的方向延伸有凸起321，所述凸起321为一端开口的半包围结构，所述薄膜32上开设有第一通孔322，所述第一通孔322位于所述薄膜32上与所述凸起321的开口相对的另一 端上，所述薄膜32位于所述振膜支架31的上方，且位于所述上壳体11上的卡凸115的下方。
所述薄膜32可以为聚酯薄膜32、硅胶薄膜32等，当采用温度特性较好的薄膜32时，所述薄膜32在所述动铁受话器100的生产过程中可以直接通过回流焊设备，提高所述动铁受话器100的自动化生产程度，进而提高所述动铁受话器100的生产效率。
所述振片33位于所述薄膜32的凸起321内，所述振片33上与第一通孔322相对应的位置开设有第二通孔331。所述振片33的薄厚均匀，在声学一致性、声压等上能够达到更好的效果。所述振片33采用铝镁合金、不锈钢或镍制成，铝镁合金、不锈钢或镍材质的振片33的刚性比现有的铝材质的振片33的刚性更好，在声音的高频延展性上也表现得更加突出。在一些实施例中，所述振片33还可以采用其他的金属、合金、陶瓷或新型材料等。
所述连杆4的一端固定于所述簧片25的振动部251上，所述连杆4的另一端穿过所述锷铁21的缺槽213且通过所述第一通孔322和所述通孔分别与所述薄膜32和振片33相连。
可以理解的是，在其他一些实施例中，所述卡持部113可以设置于所述下壳体12上，具体的，由所述下壳体12的第三侧壁121的上表面向所述上壳体11延伸而成，所述卡持部113和所述卡槽212的数量也可以视情况做出调整，譬如四个、六个、八个或其他偶数个。
可以理解的是，在其他一些实施例中，所述限位部114也可以设置在所述下壳体12上，具体的，由所述第四侧壁122朝所述上壳体11延伸而成。
当线圈24中没有音频电流通过时，簧片25的振动部251在两片永磁体23提供的恒定磁场中处于平衡状态；当线圈24中通有音频交流电流时，线圈24因变化的电流产生变化的洛伦兹力，振动部251在洛伦兹力的驱动下往复运动，通过连杆4带动振膜组件3的薄膜32和振片33往复振动产生声波，从而完成电信号到声信号的转化。
综上所述，本申请实施例具有以下有益效果：
1、本申请的所述上壳体11和下壳体12中的一个向另一个延伸有卡持部113，所述锷铁21的外侧设置有卡槽212，所述锷铁21位于所述上壳体11和所述下壳体12之间，所述卡槽212收容所述卡持部113，实现了所述锷铁21的侧向定位，降低了装配所述锷铁21时对装配治具的精度的要求，提高了所述动铁受话器100的生产成本和生产效率；
2、与现有技术中的环形封闭结构的锷铁21相比，所述锷铁21为平板状结构，一方面，使得所述锷铁21的结构简单，易于制造成型，降低了所述锷铁21的制造成本；另一方面，降低了所述动铁受话器100的整体高度，有利于所述动铁受话器100的薄型化的发展，提高了所述动铁受话器100的市场竞争力。
需要说明的是，本申请的说明书及其附图中给出了本申请的较佳的实施例，但是，本申请可以通过许多不同的形式来实现，并不限于本说明书所描述的实施例，这些实施例不作为对本申请内容的额外限制，提供这些实施例的目的是使对本申请的公开内容的理解更加透彻全面。并且，上述各技术特征继续相互组合，形成未在上面列举的各种实施例，均视为本申请说明书记载的范围；进一步地，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，而所有这些改进和变换都应属于本申请所附权利要求的保护范围。

Claims (10)

  1. 一种动铁受话器，其特征在于，包括：
    壳体，所述壳体包括上壳体和下壳体，所述上壳体和下壳体相互扣合形成收容空间，所述上壳体和下壳体中的一个向另一个延伸有卡持部；
    马达组件，收容于所述收容空间，所述马达组件包括锷铁，所述锷铁呈平板状，所述锷铁的外侧设置有卡槽，所述锷铁位于所述上壳体和所述下壳体之间，所述卡槽收容所述卡持部，用以定位所述锷铁。
  2. 根据权利要求1所述的动铁受话器，其特征在于，所述锷铁包括主体部，自所述主体部的一侧相对间隔延伸的两个延伸部，所述卡槽的数量为两个，分别设于所述两个延伸部上，所述卡持部的数量也相对应的设置为两个。
  3. 根据权利要求2所述的动铁受话器，其特征在于，所述主体部上设置有缺槽，所述缺槽与所述延伸部位于所述主体部的相对两侧，所述上壳体和所述下壳体中的一个向另一个延伸有限位部，所述限位部收容于所述缺槽。
  4. 根据权利要求3所述的动铁受话器，其特征在于，所述马达组件还包括两片永磁体，所述锷铁和所述下壳体构成环形封闭的导磁回路，所述锷铁和所述下壳体合围形成容置空间，所述两片永磁体收容于所述容置空间，所述两片永磁体中的一个固定于所述下壳体上，所述两片永磁体中的另一个贴合且固定于所述锷铁的下表面。
  5. 根据权利要求4所述的动铁受话器，其特征在于，所述马达组件还包括簧片，所述簧片包括平行且间隔设置的振动部和固定部，以及连接所述振动部和所述固定部的连接部，所述振动部悬空于所述两片永磁体之间，所述固定部贴合且固定于所述锷铁的上表面。
  6. 根据权利要求5所述的动铁受话器，其特征在于，所述连接部位于所述两个延伸部之间。
  7. 根据权利要求6所述的动铁受话器，其特征在于，所述动铁受话器还包括收容于所述收容空间的振膜组件和连杆，所述振膜组件位于所 述锷铁的上方，所述连杆的一端固定于所述振动部上，另一端穿过所述缺槽固定于所述振膜组件上。
  8. 根据权利要求7所述的动铁受话器，其特征在于，所述振膜组件包括环状结构的振膜支架，所述上壳体的侧壁设置有卡凸，所述卡凸位于所述振膜支架的上方，用于卡持固定所述振膜支架。
  9. 根据权利要求7所述的动铁受话器，其特征在于，所述振膜组件还包括薄膜和振片，所述薄膜位于所述振膜支架的上方，所述薄膜朝远离所述锷铁的方向延伸有凸起，所述凸起为一端开口的半包围结构，所述振片位于所述凸起内。
  10. 根据权利要求9所述的动铁受话器，其特征在于，所述薄膜的一端开设有第一通孔，所述振片上与所述第一通孔对应的位置设有第二通孔，所述第一通孔与所述第二通孔用于与连杆连接。
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