WO2011013462A1 - Electroacoustic transducer having vibration function - Google Patents
Electroacoustic transducer having vibration function Download PDFInfo
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- WO2011013462A1 WO2011013462A1 PCT/JP2010/060203 JP2010060203W WO2011013462A1 WO 2011013462 A1 WO2011013462 A1 WO 2011013462A1 JP 2010060203 W JP2010060203 W JP 2010060203W WO 2011013462 A1 WO2011013462 A1 WO 2011013462A1
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- frame
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- electroacoustic transducer
- suspension
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
Definitions
- the present invention relates to an electroacoustic transducer with a vibration function including a diaphragm that generates sound waves and a suspension that generates mechanical vibrations.
- mobile terminal devices such as mobile phones and PDAs are used to notify the user of incoming calls by generating a buzzer sound or melody sound, or switching the device housing to vibrate without producing a sound. It is configured to.
- a structure in which a speaker for generating sound similar to a small speaker and a vibration generator that generates vibration by rotating an eccentric weight with a small motor has been adopted.
- incorporating both the speaker and the vibrator in this manner is disadvantageous in terms of downsizing and cost reduction of the device. Therefore, in recent years, a multi-function vibration actuator, which is a magnetically driven actuator that generates both sound and vibration with a single one, has been used. Such a multifunction vibration actuator is disclosed.
- a voice coil 18 joined to the diaphragm 11 includes a yoke 103, a magnet 104, a plate 105, and a weight 9, and an inner peripheral surface of the yoke 103 and an outer peripheral surface of the magnet 104 and the plate 105.
- the magnetic gap 35 to be formed is sandwiched between the gaps.
- the yoke 103 may double as the yoke.
- the magnetic circuit 17 is attached to the suspension 19 and can vibrate mechanically.
- the outer peripheral portion of the diaphragm 13 is attached to the frame 12, and the frame 12 is directly connected to the suspension 19 to which the magnetic circuit 17 is attached. Therefore, when the electroacoustic transducer with a vibration function is continuously operated, the natural frequency (f0) of the mechanical vibration is changed due to the deterioration of the bonding material 4 or the like, and the vibration of the mechanical vibration is reduced. In addition, there is a problem that reliability is impaired.
- the present invention aims to realize an electroacoustic transducer with a vibration function that solves the above-mentioned problems.
- An electroacoustic transducer with a vibration function includes a frame, a diaphragm fixed to the frame, a voice coil fixed to a lower side of the diaphragm, and a magnetic circuit fixed to the frame.
- the magnetic circuit unit is formed with a magnetic gap, and the voice coil maintains a gap in the magnetic gap.
- the diaphragm is sandwiched and acoustically vibrated by the magnetic circuit unit, The magnetic circuit unit is mechanically vibrated by the suspension, and the suspension is fixed to the frame via a buffer member.
- the buffer member is made of a metallic ring, and the ring is fixed to the frame by a bonding material.
- the ring and the suspension are fixed by laser welding.
- the ring is integrated with the frame.
- the fluctuation of the natural vibration f0 of the mechanical vibration can be suppressed while minimizing the change in the resonance frequency during continuous operation, and the initial vibration can be provided over a long period of time. Further, since the suspension bonding material does not adhere, a natural vibration f0 of mechanical vibration as designed can be obtained. Further, by integrating the ring and the frame, the manufacturing process can be facilitated and the time can be shortened, and the fluctuation of the natural vibration f0 of the mechanical vibration can be suppressed.
- FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 2 is an enlarged view of the vicinity of a frame according to Embodiment 1.
- FIG. It is sectional drawing of the electroacoustic transducer with a vibration function which concerns on Embodiment 2 of this invention. It is sectional drawing of the electroacoustic transducer with a vibration function of a prior art example. It is a frame vicinity enlarged view of the electroacoustic transducer with a vibration function of a prior art example. It is a graph of the continuous load test which concerns on Embodiment 1 of this invention. It is a graph of the continuous load test which concerns on a prior art example.
- FIG. 1 is a perspective view illustrating a configuration of an electroacoustic transducer 10 according to the first embodiment. This has an outer diameter of ⁇ 10 to ⁇ 20 mm and an overall height t of 3 to 5 mm. However, the size can be freely changed depending on the equipment.
- FIG. 2 is a cross-sectional view of the electroacoustic transducer shown in FIG. 1 taken along line AA ′.
- an electroacoustic transducer 10 includes a frame 1, a diaphragm 2, a voice coil 21, a magnetic circuit 3, a suspension 5, and a buffer member 6.
- the magnetic circuit 3 includes a weight 9.
- the magnetic circuit 3 can be used without the weight 9.
- the voice coil 21 fixed to the lower side of the diaphragm 2 is prepared.
- a recess is formed in the yoke 31, and a disk-shaped magnet 33 is fixed to the recess with an adhesive.
- a disk-shaped plate 32 is fixed to the upper surface of the magnet 33 with an adhesive.
- a ring-shaped magnetic gap portion 35 is formed between the inner peripheral surface of the recess of the yoke 31, the outer peripheral surface of the plate 32, and the magnet 33.
- the shapes of the yoke 31 and the magnet 33 are arbitrary, and a track shape, a square shape, and the like are also possible. Thereafter, the weight 9 is fixed to the yoke 31 to form the magnetic circuit 3, and the suspension 5 is further fixed.
- a metallic ring 6, which is a buffer member 6, is fixed to the lower side portion of the cylindrical frame 1 with a bonding material 4.
- the shape of the frame 1 can be changed.
- the magnetic circuit 3 is suspended in the frame 1 by fixing the suspension 5 to the ring 6 by laser welding.
- the suspension 5 is indirectly fixed to the frame 1 after the ring 6 is fixed to the frame 1 with the bonding material 4, the bonding material 4 does not adhere to the suspension 5. Furthermore, even if the bonding material 4 droops at worst, it does not reach the suspension 5 due to the thickness of the ring 6. As described above, the suspension 5 is not directly connected to the frame 1 because the bonding material 4 protrudes from the suspension 5 when the bonding material 4 is applied, and the natural frequency f0 of the mechanical vibration varies. is there. Further, if the bonding material 4 is attached to the suspension 5, the natural frequency f0 of the mechanical vibration changes when the electroacoustic transducer with a vibration function is continuously operated, causing a problem in reliability. The change data of the natural frequency f0 of the mechanical vibration will be described later.
- the magnet cover 36 is fixed to the lower part of the frame 1.
- the magnet cover 36 is formed with an air vent hole 37, and even if the magnetic circuit 3 vibrates, the magnetic circuit 3 can move smoothly because the air escapes.
- the diaphragm 2 to which the voice coil 21 is connected is fixed to the upper part of the frame 1. At this time, the voice coil 21 is sandwiched with a gap in the magnetic gap 35 of the magnetic circuit 3. Further, the diaphragm cover 7 may be fixed at the same time. Next, as shown in FIG. 1, the voice coil 21 is connected to the external electrode terminal 8 for exchanging signals with the outside.
- the electroacoustic transducer with vibration function 10 is completed, and two vibration systems are formed inside the cylindrical frame 1.
- the first vibration system is composed of the suspension 5 and the magnetic circuit 3
- the second vibration system is composed of the diaphragm 2 and the voice coil 21.
- the first vibration system has a natural frequency f0 of about 150 Hz to 200 Hz, and the second vibration system can reproduce sound in an audible band of 300 Hz to 20 kHz.
- the first vibration system resonates and a mechanical vibration that can be experienced is emitted. Further, by supplying an alternating current having a natural frequency of the second vibration system to the pair of external electrode terminals 8, the second vibration system resonates and audible acoustic vibration (ringer sound, melody sound) is emitted. .
- the second embodiment eliminates the bonding material 4 used in the first embodiment by using the frame 11 in which the ring 6 is integrally formed with the frame 1 of the first embodiment. Other than that, it manufactured similarly to Embodiment 1.
- FIG. By integrating the ring 6 into the frame 11, there is no bonding material 4, so it does not adhere to the suspension 5, and the natural frequency f 0 of mechanical vibration does not change. Furthermore, the manufacturing process is easy and the process time can be reduced.
- Table 1 shows test results in continuous operation at the natural frequency f0 of the mechanical vibration of the suspension 5 in the first embodiment of the present invention and the conventional example.
- FIG. 7 shows a change in the first embodiment
- FIG. 8 shows a conventional example with respect to a change in acceleration of mechanical vibration from 130 Hz to 170 Hz.
- the frequency at which the acceleration becomes maximum is the natural frequency f0.
- a Sin wave having the lowest resonance frequency f0 of mechanical vibration is continuously loaded, and it is confirmed that there is no characteristic change or destruction. Measurement is performed with an applied voltage of 0.35 V and a weight of 80 g. At this time, the weight to be loaded varies depending on the model.
- the change of the natural frequency f0 after 168 hours is 1 Hz, which is a slight change of 0.6% compared to before the test.
- the frequency is similarly 5 Hz, which is greatly changed by 3% compared to before the test.
- Embodiment 1 of the present invention there is little fluctuation in the natural frequency f0 even during continuous operation.
- the mechanical vibration can continue to be stable over a long period of time.
- each part structure of this invention is not restricted to the said embodiment, A various deformation
- transformation is possible within the technical scope as described in a claim, and is not limited to the embodiment mentioned above.
Abstract
When an electroacoustic transducer having a vibration function is continuously operated, there are drawbacks that a phenomenon that a natural vibration frequency (f0) of mechanical vibration is changed occurs, and thus, the mechanical vibration is reduced, and reliability is lost.
The electroacoustic transducer having a vibration function is provided with a fame, a vibration plate fixed to the frame, a voice coil fixed to the lower side of the vibration plate, and a suspension which is fixed to the frame and supports a magnetic circuit unit so as to be movable in up and down directions, wherein the suspension is fixed to the frame through a buffer member.
Description
本発明は、音波を発生させる振動板と機械的振動を発生させるサスペンションとを備えた振動機能付電気音響変換器に関する。
The present invention relates to an electroacoustic transducer with a vibration function including a diaphragm that generates sound waves and a suspension that generates mechanical vibrations.
従来、携帯電話やＰＤＡなどの携帯端末装置には、使用者に着信を知らせるのに、ブザー音やメロディ音を発生したり、音を出さずに機器の筐体を振動させるように切り替えて使用するように構成されている。そのために、小型スピーカに類する音響発生用のスピーカと、偏心重りを小型モータで回転させて振動を発生する振動発生器を合わせて内蔵する構造が取られてきた。しかし、このようにスピーカと振動体との両方を組込むことは機器の小型化や低価格化の上で不利であった。そこで、近年１個のもので音響と振動の両方を発生させる磁気駆動型アクチュエータである多機能振動アクチュエータが用いられるよになっている。このような、多機能振動アクチュエータが開示されている。
Conventionally, mobile terminal devices such as mobile phones and PDAs are used to notify the user of incoming calls by generating a buzzer sound or melody sound, or switching the device housing to vibrate without producing a sound. It is configured to. For this purpose, a structure in which a speaker for generating sound similar to a small speaker and a vibration generator that generates vibration by rotating an eccentric weight with a small motor has been adopted. However, incorporating both the speaker and the vibrator in this manner is disadvantageous in terms of downsizing and cost reduction of the device. Therefore, in recent years, a multi-function vibration actuator, which is a magnetically driven actuator that generates both sound and vibration with a single one, has been used. Such a multifunction vibration actuator is disclosed.
従来技術における図５、図６の振動機能付電気音響変換器は、次のように構成されている。振動板１１に接合されるボイスコイル１８が、磁気回路１７は、ヨーク１０３、マグネット１０４、プレート１０５及び重り９で構成され、構成するヨーク１０３の内周面とマグネット１０４及びプレート１０５の外周面で形成される磁気ギャップ３５に空隙を保って挟み込まれている。ここで、ヨーク１０３がヨークと重りを兼ねることもある。
The electroacoustic transducer with a vibration function shown in FIGS. 5 and 6 in the prior art is configured as follows. A voice coil 18 joined to the diaphragm 11 includes a yoke 103, a magnet 104, a plate 105, and a weight 9, and an inner peripheral surface of the yoke 103 and an outer peripheral surface of the magnet 104 and the plate 105. The magnetic gap 35 to be formed is sandwiched between the gaps. Here, the yoke 103 may double as the yoke.
磁気回路１７は、サスペンション１９に取付けられて機械的振動することができる。
振動板１３の外周部が、フレーム１２に取付けられ、フレーム１２は、磁気回路１７が取付けられたサスペンション１９と直接接続されている。
そのため、振動機能付電気音響変換器を連続稼動したとき、接合材４の劣化などの原因により機械的振動の固有振動数（ｆ0）が変化するということが発生し、機械的振動の振動の減少及び信頼性が損なわれるという問題があった。 Themagnetic circuit 17 is attached to the suspension 19 and can vibrate mechanically.
The outer peripheral portion of thediaphragm 13 is attached to the frame 12, and the frame 12 is directly connected to the suspension 19 to which the magnetic circuit 17 is attached.
Therefore, when the electroacoustic transducer with a vibration function is continuously operated, the natural frequency (f0) of the mechanical vibration is changed due to the deterioration of thebonding material 4 or the like, and the vibration of the mechanical vibration is reduced. In addition, there is a problem that reliability is impaired.
振動板１３の外周部が、フレーム１２に取付けられ、フレーム１２は、磁気回路１７が取付けられたサスペンション１９と直接接続されている。
そのため、振動機能付電気音響変換器を連続稼動したとき、接合材４の劣化などの原因により機械的振動の固有振動数（ｆ0）が変化するということが発生し、機械的振動の振動の減少及び信頼性が損なわれるという問題があった。 The
The outer peripheral portion of the
Therefore, when the electroacoustic transducer with a vibration function is continuously operated, the natural frequency (f0) of the mechanical vibration is changed due to the deterioration of the
さらに、組立時においてもサスペンション１９に接合材が付着することが起き、設計時の機械的振動の固有振動数（ｆ0）が変化してしまう問題もあった。
Furthermore, there is also a problem that the bonding material adheres to the suspension 19 during assembly, and the natural frequency (f0) of the mechanical vibration at the time of design changes.
本発明は上記問題点を解決する振動機能付電気音響変換器を実現することを目的とする。
The present invention aims to realize an electroacoustic transducer with a vibration function that solves the above-mentioned problems.
本発明に係る振動機能付電気音響変換器は、フレームと、前記フレームに固着された振動板と、該振動板の下側に固着されたボイスコイルと、前記フレームに固着されると共に、磁気回路部を上下動可能に支持するサスペンションと、を備えた振動機能付電気音響変換器において、前記磁気回路部は、磁気ギャップが形成されると共に、該磁気ギャップには前記ボイスコイルが空隙を保って挟み込まれ、前記磁気回路部によって、前記振動板を音響振動させ、
前記サスペンションによって、前記磁気回路部を機械的振動させ、前記サスペンションは、緩衝部材を介して前記フレームに固着されたことを特徴とする。 An electroacoustic transducer with a vibration function according to the present invention includes a frame, a diaphragm fixed to the frame, a voice coil fixed to a lower side of the diaphragm, and a magnetic circuit fixed to the frame. In the electroacoustic transducer with vibration function, the magnetic circuit unit is formed with a magnetic gap, and the voice coil maintains a gap in the magnetic gap. The diaphragm is sandwiched and acoustically vibrated by the magnetic circuit unit,
The magnetic circuit unit is mechanically vibrated by the suspension, and the suspension is fixed to the frame via a buffer member.
前記サスペンションによって、前記磁気回路部を機械的振動させ、前記サスペンションは、緩衝部材を介して前記フレームに固着されたことを特徴とする。 An electroacoustic transducer with a vibration function according to the present invention includes a frame, a diaphragm fixed to the frame, a voice coil fixed to a lower side of the diaphragm, and a magnetic circuit fixed to the frame. In the electroacoustic transducer with vibration function, the magnetic circuit unit is formed with a magnetic gap, and the voice coil maintains a gap in the magnetic gap. The diaphragm is sandwiched and acoustically vibrated by the magnetic circuit unit,
The magnetic circuit unit is mechanically vibrated by the suspension, and the suspension is fixed to the frame via a buffer member.
好ましくは、前記緩衝部材は、金属性のリングからなり、該リングは、接合材によって前記フレームに固着されることを特徴とする。
Preferably, the buffer member is made of a metallic ring, and the ring is fixed to the frame by a bonding material.
好ましくは、前記リングと前記サスペンションとは、レーザ溶接で固着したことを特徴とする。
Preferably, the ring and the suspension are fixed by laser welding.
好ましくは、前記リングは、前記フレームと一体化したことを特徴とする。
Preferably, the ring is integrated with the frame.
本発明によれば、連続稼動における共振周波数の変化を最小限に抑えながら、機械的振動の固有振動ｆ0の変動が抑制でき、初期の振動を長期間に亘って提供できる。
また、サスペンションの接合材が付着しないので、設計通りの機械的振動の固有振動ｆ0が得られる。
また、リングとフレームを一体化することで製造工程が、容易、且つ時間短縮にもなり、さらに、機械的振動の固有振動ｆ0の変動も抑制できる。 According to the present invention, the fluctuation of the natural vibration f0 of the mechanical vibration can be suppressed while minimizing the change in the resonance frequency during continuous operation, and the initial vibration can be provided over a long period of time.
Further, since the suspension bonding material does not adhere, a natural vibration f0 of mechanical vibration as designed can be obtained.
Further, by integrating the ring and the frame, the manufacturing process can be facilitated and the time can be shortened, and the fluctuation of the natural vibration f0 of the mechanical vibration can be suppressed.
また、サスペンションの接合材が付着しないので、設計通りの機械的振動の固有振動ｆ0が得られる。
また、リングとフレームを一体化することで製造工程が、容易、且つ時間短縮にもなり、さらに、機械的振動の固有振動ｆ0の変動も抑制できる。 According to the present invention, the fluctuation of the natural vibration f0 of the mechanical vibration can be suppressed while minimizing the change in the resonance frequency during continuous operation, and the initial vibration can be provided over a long period of time.
Further, since the suspension bonding material does not adhere, a natural vibration f0 of mechanical vibration as designed can be obtained.
Further, by integrating the ring and the frame, the manufacturing process can be facilitated and the time can be shortened, and the fluctuation of the natural vibration f0 of the mechanical vibration can be suppressed.
以下、本実施の形態について図に基づいて説明する。
（実施の形態１）
最初に本発明の実施形態１の電気音響変換機器の構成について説明する。
図１は、実施形態１における電気音響変換機器１０の構成を示す斜視図である。これは、外径がφ１０～φ２０ｍｍ、全高ｔが３～５ｍｍである。但し、大きさは機器などにより自由に変更できる。
図２は、図１に示す電気音響変換機器のＡ－Ａ‘線で切断したときの断面図である。
図１及び図２を参照して、実施形態１の電気音響変換機器１０は、フレーム１と、振動板２と、ボイスコイル２１と、磁気回路３と、サスペンション５と、緩衝部材６とを主に有している。ここで、磁気回路３は重り９を含む。但し、磁気回路３は重り９が無い場合も可能である。 Hereinafter, the present embodiment will be described with reference to the drawings.
(Embodiment 1)
First, the configuration of the electroacoustic transducer according toEmbodiment 1 of the present invention will be described.
FIG. 1 is a perspective view illustrating a configuration of anelectroacoustic transducer 10 according to the first embodiment. This has an outer diameter of φ10 to φ20 mm and an overall height t of 3 to 5 mm. However, the size can be freely changed depending on the equipment.
FIG. 2 is a cross-sectional view of the electroacoustic transducer shown in FIG. 1 taken along line AA ′.
1 and 2, anelectroacoustic transducer 10 according to Embodiment 1 includes a frame 1, a diaphragm 2, a voice coil 21, a magnetic circuit 3, a suspension 5, and a buffer member 6. Have. Here, the magnetic circuit 3 includes a weight 9. However, the magnetic circuit 3 can be used without the weight 9.
（実施の形態１）
最初に本発明の実施形態１の電気音響変換機器の構成について説明する。
図１は、実施形態１における電気音響変換機器１０の構成を示す斜視図である。これは、外径がφ１０～φ２０ｍｍ、全高ｔが３～５ｍｍである。但し、大きさは機器などにより自由に変更できる。
図２は、図１に示す電気音響変換機器のＡ－Ａ‘線で切断したときの断面図である。
図１及び図２を参照して、実施形態１の電気音響変換機器１０は、フレーム１と、振動板２と、ボイスコイル２１と、磁気回路３と、サスペンション５と、緩衝部材６とを主に有している。ここで、磁気回路３は重り９を含む。但し、磁気回路３は重り９が無い場合も可能である。 Hereinafter, the present embodiment will be described with reference to the drawings.
(Embodiment 1)
First, the configuration of the electroacoustic transducer according to
FIG. 1 is a perspective view illustrating a configuration of an
FIG. 2 is a cross-sectional view of the electroacoustic transducer shown in FIG. 1 taken along line AA ′.
1 and 2, an
製造方法は、以下に示すが、製造の順番など変更可能である。
まず、振動板２の下側にボイスコイル２１が固着されたものを用意しておく。
図２に示すように、磁気回路３の形成工程は、ヨーク３１に凹みを形成し、その凹みに円板状のマグネット３３を接着剤により固定する。さらに、マグネット３３の上面には円板状のプレート３２を接着剤により固定する。この工程で、ヨーク３１の凹みの内周面とプレート３２の外周面及びマグネット３３との間に、リング状の磁気ギャップ部３５が形成される。ここで、ヨーク３１、マグネット３３などの形状は、任意でありトラック形状、角型形状なども可能である。
その後、ヨーク３１に重り９を固着して磁気回路３を形成し、さらにサスペンション５を固着する。 Although a manufacturing method is shown below, the order of manufacture etc. can be changed.
First, thevoice coil 21 fixed to the lower side of the diaphragm 2 is prepared.
As shown in FIG. 2, in the process of forming themagnetic circuit 3, a recess is formed in the yoke 31, and a disk-shaped magnet 33 is fixed to the recess with an adhesive. Further, a disk-shaped plate 32 is fixed to the upper surface of the magnet 33 with an adhesive. In this step, a ring-shaped magnetic gap portion 35 is formed between the inner peripheral surface of the recess of the yoke 31, the outer peripheral surface of the plate 32, and the magnet 33. Here, the shapes of the yoke 31 and the magnet 33 are arbitrary, and a track shape, a square shape, and the like are also possible.
Thereafter, theweight 9 is fixed to the yoke 31 to form the magnetic circuit 3, and the suspension 5 is further fixed.
まず、振動板２の下側にボイスコイル２１が固着されたものを用意しておく。
図２に示すように、磁気回路３の形成工程は、ヨーク３１に凹みを形成し、その凹みに円板状のマグネット３３を接着剤により固定する。さらに、マグネット３３の上面には円板状のプレート３２を接着剤により固定する。この工程で、ヨーク３１の凹みの内周面とプレート３２の外周面及びマグネット３３との間に、リング状の磁気ギャップ部３５が形成される。ここで、ヨーク３１、マグネット３３などの形状は、任意でありトラック形状、角型形状なども可能である。
その後、ヨーク３１に重り９を固着して磁気回路３を形成し、さらにサスペンション５を固着する。 Although a manufacturing method is shown below, the order of manufacture etc. can be changed.
First, the
As shown in FIG. 2, in the process of forming the
Thereafter, the
次に、図３に示すように筒状のフレーム１の下側部に、緩衝部材６である金属性のリング６を接合材４で固着する。
ここで、フレーム１の形状は変更可能である。
その後、リング６にサスペンション５をレーザ溶接により固着することによって、磁気回路３がフレーム１に宙吊りとなる。 Next, as shown in FIG. 3, ametallic ring 6, which is a buffer member 6, is fixed to the lower side portion of the cylindrical frame 1 with a bonding material 4.
Here, the shape of theframe 1 can be changed.
Thereafter, themagnetic circuit 3 is suspended in the frame 1 by fixing the suspension 5 to the ring 6 by laser welding.
ここで、フレーム１の形状は変更可能である。
その後、リング６にサスペンション５をレーザ溶接により固着することによって、磁気回路３がフレーム１に宙吊りとなる。 Next, as shown in FIG. 3, a
Here, the shape of the
Thereafter, the
ここで、フレーム１にリング６を接合材４で固着した後に、サスペンション５をフレーム１に間接的に固着するため、サスペンション５に接合材４が付着することは無い。さらには、最悪として接合材４が垂れたとしても、リング６の厚みによりサスペンション５まで達しない。
上記のように、フレーム１に直接サスペンション５を接続しないのは、接合材４を塗布したとき、サスペンション５に接合材４がはみだし、機械的振動の固有振動数ｆ0にバラツキが生じてしまうためである。さらに、サスペンション５に接合材４が付着していると、振動機能付電気音響変換器を連続稼動したとき機械的振動の固有振動数ｆ0が変化し信頼性に問題が生じる。
機械的振動の固有振動数ｆ0の変化データについては、後述する。 Here, since thesuspension 5 is indirectly fixed to the frame 1 after the ring 6 is fixed to the frame 1 with the bonding material 4, the bonding material 4 does not adhere to the suspension 5. Furthermore, even if the bonding material 4 droops at worst, it does not reach the suspension 5 due to the thickness of the ring 6.
As described above, thesuspension 5 is not directly connected to the frame 1 because the bonding material 4 protrudes from the suspension 5 when the bonding material 4 is applied, and the natural frequency f0 of the mechanical vibration varies. is there. Further, if the bonding material 4 is attached to the suspension 5, the natural frequency f0 of the mechanical vibration changes when the electroacoustic transducer with a vibration function is continuously operated, causing a problem in reliability.
The change data of the natural frequency f0 of the mechanical vibration will be described later.
上記のように、フレーム１に直接サスペンション５を接続しないのは、接合材４を塗布したとき、サスペンション５に接合材４がはみだし、機械的振動の固有振動数ｆ0にバラツキが生じてしまうためである。さらに、サスペンション５に接合材４が付着していると、振動機能付電気音響変換器を連続稼動したとき機械的振動の固有振動数ｆ0が変化し信頼性に問題が生じる。
機械的振動の固有振動数ｆ0の変化データについては、後述する。 Here, since the
As described above, the
The change data of the natural frequency f0 of the mechanical vibration will be described later.
次に、図３に示すようにフレーム１の下側部に、マグネットカバー３６を固着する。この、マグネットカバー３６には空気抜きの穴３７が形成してあり、磁気回路３が振動しても空気が抜けることで、磁気回路３がスムーズに可動するようになる。
Next, as shown in FIG. 3, the magnet cover 36 is fixed to the lower part of the frame 1. The magnet cover 36 is formed with an air vent hole 37, and even if the magnetic circuit 3 vibrates, the magnetic circuit 3 can move smoothly because the air escapes.
次に、図２に示すように、フレーム１の上側部に、ボイスコイル２１が接続された振動板２を、フレーム１の上側部に固着する。この時、ボイスコイル２１は磁気回路３の磁気ギャップ３５に空隙を持って挟みこむ。また、振動板カバー７も同時に固着しても良い。次に、図１に示すように、ボイスコイル２１は、外部と信号のやり取りをするための外部電極端子８に接続される。
Next, as shown in FIG. 2, the diaphragm 2 to which the voice coil 21 is connected is fixed to the upper part of the frame 1. At this time, the voice coil 21 is sandwiched with a gap in the magnetic gap 35 of the magnetic circuit 3. Further, the diaphragm cover 7 may be fixed at the same time. Next, as shown in FIG. 1, the voice coil 21 is connected to the external electrode terminal 8 for exchanging signals with the outside.
上記により、振動機能付電気音響変換器１０が完成し、筒状フレーム１の内部には２つの振動系が形成されることになる。第１の振動系は、サスペンション５、磁気回路３から構成され、第２の振動系は、振動板２及びボイスコイル２１から構成される。第１振動系は、１５０Ｈｚ～２００Ｈｚ程度の固有振動数ｆ0を有し、第２振動系は、３００Ｈｚ～２０ｋＨｚの可聴帯で音響再生が可能である。
As described above, the electroacoustic transducer with vibration function 10 is completed, and two vibration systems are formed inside the cylindrical frame 1. The first vibration system is composed of the suspension 5 and the magnetic circuit 3, and the second vibration system is composed of the diaphragm 2 and the voice coil 21. The first vibration system has a natural frequency f0 of about 150 Hz to 200 Hz, and the second vibration system can reproduce sound in an audible band of 300 Hz to 20 kHz.
従って、一対の外部電極端子８に第１振動系の固有振動数を有する交番電流を供給することによって、第１振動系が共振し、体感可能な機械的振動が発せられる。又、一対の外部電極端子８に第２振動系の固有振動数を有する交番電流を供給することによって、第２振動系が共振し、可聴帯の音響振動(リンガー音、メロディ音)が発せられる。
Therefore, by supplying an alternating current having the natural frequency of the first vibration system to the pair of external electrode terminals 8, the first vibration system resonates and a mechanical vibration that can be experienced is emitted. Further, by supplying an alternating current having a natural frequency of the second vibration system to the pair of external electrode terminals 8, the second vibration system resonates and audible acoustic vibration (ringer sound, melody sound) is emitted. .
尚、サスペンション５に接合材４が付着しないように、初めからフレーム１とサスペンション５を一体形成することも考えられるが、そうすると、サスペンション仕様を自由に変更し、固有振動数ｆ0を変更できなくなり、いろいろな機器または機種に対応できなくなる問題がある。
（実施形態２）
図４に示すように、実施形態２は、実施形態１のフレーム１に、リング６を一体形成したフレーム１１を使用することで、実施形態１で使用していた接合材４をなくした。それ以外は、実施形態１と同様に製造した。フレーム１１にリング６を一体化することで、接合材４が無いためサスペンション５に付着することはなく、機械的振動の固有振動数ｆ0も変化しない。さらに、製造工程が容易、且つ工程の時間も削減できる。 Although it is conceivable that theframe 1 and the suspension 5 are integrally formed from the beginning so that the bonding material 4 does not adhere to the suspension 5, the suspension specifications can be freely changed and the natural frequency f0 cannot be changed. There is a problem that it becomes impossible to support various devices or models.
(Embodiment 2)
As shown in FIG. 4, the second embodiment eliminates thebonding material 4 used in the first embodiment by using the frame 11 in which the ring 6 is integrally formed with the frame 1 of the first embodiment. Other than that, it manufactured similarly to Embodiment 1. FIG. By integrating the ring 6 into the frame 11, there is no bonding material 4, so it does not adhere to the suspension 5, and the natural frequency f 0 of mechanical vibration does not change. Furthermore, the manufacturing process is easy and the process time can be reduced.
（実施形態２）
図４に示すように、実施形態２は、実施形態１のフレーム１に、リング６を一体形成したフレーム１１を使用することで、実施形態１で使用していた接合材４をなくした。それ以外は、実施形態１と同様に製造した。フレーム１１にリング６を一体化することで、接合材４が無いためサスペンション５に付着することはなく、機械的振動の固有振動数ｆ0も変化しない。さらに、製造工程が容易、且つ工程の時間も削減できる。 Although it is conceivable that the
(Embodiment 2)
As shown in FIG. 4, the second embodiment eliminates the
（従来例）
以下、従来例について、図５、図６に基づいて説明する。
図５、図６に示すように、従来例は実施形態１で使用のリング６を介さずに、直接サスペンション１９をフレーム１２の下側部に取付ける以外は、実施形態１と同様に製造した。 (Conventional example)
Hereinafter, a conventional example will be described with reference to FIGS.
As shown in FIGS. 5 and 6, the conventional example was manufactured in the same manner as in the first embodiment except that thesuspension 19 was directly attached to the lower side portion of the frame 12 without using the ring 6 used in the first embodiment.
以下、従来例について、図５、図６に基づいて説明する。
図５、図６に示すように、従来例は実施形態１で使用のリング６を介さずに、直接サスペンション１９をフレーム１２の下側部に取付ける以外は、実施形態１と同様に製造した。 (Conventional example)
Hereinafter, a conventional example will be described with reference to FIGS.
As shown in FIGS. 5 and 6, the conventional example was manufactured in the same manner as in the first embodiment except that the
本願発明の実施形態１と従来例において、サスペンション５の機械的振動の固有振動数ｆ0の連続運転での試験結果を表１に示す。また、機械的振動の加速度の１３０Ｈｚから１７０Ｈｚまでの変化について、実施形態１の変化を図７、従来例を図８で示す。
ここで、加速度が最も大きくなる点の周波数を固有振動数ｆ0としている。 Table 1 shows test results in continuous operation at the natural frequency f0 of the mechanical vibration of thesuspension 5 in the first embodiment of the present invention and the conventional example. FIG. 7 shows a change in the first embodiment and FIG. 8 shows a conventional example with respect to a change in acceleration of mechanical vibration from 130 Hz to 170 Hz.
Here, the frequency at which the acceleration becomes maximum is the natural frequency f0.
ここで、加速度が最も大きくなる点の周波数を固有振動数ｆ0としている。 Table 1 shows test results in continuous operation at the natural frequency f0 of the mechanical vibration of the
Here, the frequency at which the acceleration becomes maximum is the natural frequency f0.
試験方法は、機械的振動の最低共振周波数ｆ０のＳｉｎ波を連続的に負荷し、特性変化、破壊のないことを確認する。
印加電圧 ０．３５Ｖ、重り ８０ｇを負荷して測定している。
この時、負荷する重りは、機種などによって異なる。 In the test method, a Sin wave having the lowest resonance frequency f0 of mechanical vibration is continuously loaded, and it is confirmed that there is no characteristic change or destruction.
Measurement is performed with an applied voltage of 0.35 V and a weight of 80 g.
At this time, the weight to be loaded varies depending on the model.
印加電圧 ０．３５Ｖ、重り ８０ｇを負荷して測定している。
この時、負荷する重りは、機種などによって異なる。 In the test method, a Sin wave having the lowest resonance frequency f0 of mechanical vibration is continuously loaded, and it is confirmed that there is no characteristic change or destruction.
Measurement is performed with an applied voltage of 0.35 V and a weight of 80 g.
At this time, the weight to be loaded varies depending on the model.
表１より、実施形態１の連続運転では、１６８時間経過後固有振動数ｆ0の変化が１Ｈｚとなり試験前と比べて０．６％と僅かの変化である。従来例では、同様に５Ｈｚとなり試験前と比べて３％と大きく変化している。
From Table 1, in the continuous operation of Embodiment 1, the change of the natural frequency f0 after 168 hours is 1 Hz, which is a slight change of 0.6% compared to before the test. In the conventional example, the frequency is similarly 5 Hz, which is greatly changed by 3% compared to before the test.
従って、本願発明の実施形態１のように、連続運転しても固有振動数ｆ0の変動が少なく、
機械的振動が長期間に亘って安定した振動を続けることができる。 Therefore, as inEmbodiment 1 of the present invention, there is little fluctuation in the natural frequency f0 even during continuous operation.
The mechanical vibration can continue to be stable over a long period of time.
機械的振動が長期間に亘って安定した振動を続けることができる。 Therefore, as in
The mechanical vibration can continue to be stable over a long period of time.
尚、本発明の各部構成は上記実施の形態に限らず、特許請求の範囲に記載の技術的範囲内で種々の変形が可能であり、上述した実施形態に限定されるものではない。
In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim, and is not limited to the embodiment mentioned above.
１ フレーム、２ 振動板、２１ ボイスコイル、３ 磁気回路、３１ ヨーク、３２ プレート、３３ マグネット、３４ ヨーク内周面、３５ 磁気ギャップ、３６ マグネットカバー、３７ 穴、４ 可動部材、５ サスペンション、６ リング、７ 振動板カバー、８ 外部電極端子、９ 重り、１０ 電気音響変換機器、１１ フレーム、１２ フレーム、１３ 振動板、１０３ ヨーク、１０４ マグネット、１０５ プレート
1 frame, 2 diaphragm, 21 voice coil, 3 magnetic circuit, 31 yoke, 32 plate, 33 magnet, 34 yoke inner peripheral surface, 35 magnetic gap, 36 magnet cover, 37 holes, 4 movable members, 5 suspension, 6 rings 7, diaphragm cover, 8 external electrode terminal, 9 weight, 10 electroacoustic transducer, 11 frame, 12 frame, 13 diaphragm, 103 yoke, 104 magnet, 105 plate
Claims (4)
- フレームと、前記フレームに固着された振動板と、該振動板の下側に固着されたボイスコイルと、前記フレームに固着されると共に、磁気回路部を上下動可能に支持するサスペンションと、を備えた振動機能付電気音響変換器において、
前記磁気回路部は、磁気ギャップが形成されると共に、該磁気ギャップには前記ボイスコイルが空隙を保って挟み込まれ、
前記磁気回路部によって、前記振動板を音響振動させ、
前記サスペンションによって、前記磁気回路部を機械的振動させ、
前記サスペンションは、緩衝部材を介して前記フレームに固着されたことを特徴とする振動機能付電気音響変換器。 A frame, a diaphragm fixed to the frame, a voice coil fixed to the lower side of the diaphragm, and a suspension fixed to the frame and supporting the magnetic circuit unit so as to be movable up and down. Electroacoustic transducer with vibration function
The magnetic circuit portion is formed with a magnetic gap, and the voice coil is sandwiched in the magnetic gap while maintaining a gap,
The magnetic circuit unit causes the diaphragm to vibrate acoustically,
The suspension mechanically vibrates the magnetic circuit unit,
The electroacoustic transducer with a vibration function, wherein the suspension is fixed to the frame via a buffer member. - 前記緩衝部材は、金属性のリングからなり、
該リングは、接合材によって前記フレームに固着されることを特徴とする請求項１に記載の振動機能付電気音響変換器。 The buffer member is made of a metallic ring,
The electroacoustic transducer with a vibration function according to claim 1, wherein the ring is fixed to the frame by a bonding material. - 前記リングと前記サスペンションとは、レーザ溶接で固着したことを特徴とする請求項１又は２に記載の振動機能付電気音響変換器。 3. The electroacoustic transducer with a vibration function according to claim 1, wherein the ring and the suspension are fixed by laser welding.
- 前記リングは、前記フレームと一体形成されることを特徴とする請求項１又は３のいずれかに記載の振動機能付電気音響変換器。
The electroacoustic transducer with a vibration function according to claim 1, wherein the ring is formed integrally with the frame.
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