JP4565130B2

JP4565130B2 - Multi-function sound generator and portable terminal

Info

Publication number: JP4565130B2
Application number: JP2000390128A
Authority: JP
Inventors: 正一金田; 恒夫京野; 和男川村
Original assignee: Namiki Precision Jewel Co Ltd; Adamant Namiki Precision Jewel Co Ltd
Current assignee: Namiki Precision Jewel Co Ltd; Adamant Namiki Precision Jewel Co Ltd
Priority date: 2000-12-22
Filing date: 2000-12-22
Publication date: 2010-10-20
Anticipated expiration: 2020-12-22
Also published as: KR20020051817A; CN1141798C; KR100427101B1; CN1360400A; JP2002191092A

Description

【０００１】
【発明の属する技術分野】
本発明は、携帯電話や小型情報通信端末等の携帯端末機（以下、機器と云う）に搭載され、着信を音響あるいは振動によって使用者に知らせる多機能型発音体デバイスに関するものである。
【０００２】
【従来の技術】
前記機器は、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するか、音は出さずサイレントモードで、振動を発生させるかを切り替えて使えるよう構成してあるのが一般的で、そのため小型スピーカーに類する音響発生用の発音体と、偏心重りを小型モータで回転させる振動発生用の振動体を双方共に搭載する構成であった。このように発音体と振動体の両方を搭載するのは取付け工程での手間、及び機器の小型化や軽量化の上で不利であったが、近年、１つの発音体（デバイス）で音響と振動の両方を発生する多機能型発音体が提案されている。
【０００３】
図８は上記従来の多機能型発音体を示した分解斜視図、図９は図８の多機能型振動体をダイアフラム７側から見た平面図、図１０は図９の多機能型発音体のカバー15の取外し状態を示す底面図、及び図１１は図９をB−B線に沿う断面で切断したときの側断面図をそれぞれ示すものである。
【０００４】
図８に示すように、従来の多機能型発音体は、円環状のボイスコイル８と、ボイスコイル８を片面で接合支持するダイアフラム７と、磁気回路２を形成するための円盤状マグネット14及び該マグネット14を保持する受け皿状の磁気ヨーク11’及び磁気ヨーク11’の上部側に重ねられる円板状のポールピース12と、更に磁気ヨーク11’を上下両端面で弾性支持するリング状板バネのサスペンション９，９’と、金属製の底部カバー15と、これら各部品を組み付ける円環状の筐体４’とから構成されている。
【０００５】
ダイアフラム７とカバー15は、図１１に示すように各々その外周縁で筐体４’に支持固着されており、一方、図１０に示すように、サスペンション９，９’は各々約120度等間隔で設けられた突片９a，９ｂ，９ｃ，９’a，９’ｂ，９’ｃを、筐体４’の枠内に設けた高低差を持つ２種類の切欠段部４’a又は４’ｂに嵌め込んで接着され、弾性支持される。又、ボイスコイル８は磁気回路２の磁気空隙に挿入設置され、その結果ダイヤフラム７と磁気回路２とは互いに面対向で筐体４’内に組み付けられる。
【０００６】
この構造により、ある周波数を持つ電流が給電端子16からボイスコイル８に印加されると、コイル８と、マグネット14と磁気ヨーク11’とポールピース12とで構成する磁気回路２の間に電磁力が働いて互いに磁気的吸引と反発を繰り返して振動を始める。この時、電流の周波数がある程度高くて可聴周波数領域であれば、コイル８を接合してあるダイアフラム７の振動が大きくなり、その振動でブザー音、メロディ音、音声等の可聴音を発生する。
【０００７】
一方、サスペンション９，９’の方は固有振動数が低いためほとんど振動しない。電流の周波数が可聴周波数領域を下回る比較的低いものであると、ダイアフラム７は振動しなくなるため音が出なくなり、代わりに磁気回路２を固定したサスペンション９，９’の振動が大きくなる。すると、磁気回路２とサスペンション９，９’とで構成される機械振動系10が振動し、この振動系10の全体質量により振動エネルギーが大きくなるため、発生した振動が筐体４’を介して多機能型発音体３’を搭載した図示しない機器に伝わり、使用者に着信を知らせる。このようにして、１つの発音体が発音と振動の２通りの動作をするのである。
【０００８】
振動発生源である機械振動系10の磁気ヨーク11’の外周壁からは約120度等間隔で、鍔部６が筐体４’の内周面に向けて突出するように設けられている。この鍔部６は、磁気ヨーク11’と筐体４’との接触による衝撃を防止するストッパーであると共に、磁気ヨーク11’の質量を一定に保ちつつ、磁気ヨーク11’の全体厚みを薄く形成するためにも設けられるものである。
【０００９】
この鍔部６は、図１０に示すように筐体４’の内周面に設けた凹部17に収納される。この凹部17は、筐体４’の直径幅を小さく抑える逃げ部であると同時に、筐体４’の中心線方向に対しラジアルな方向の鍔部６の変位を規制するストッパーでもある。その変位を阻止することによって、サスペンション９，９’やコイル８の変形を未然に防止することができる。この凹部17を設けるため、切欠段部４’a，４’ｂは突片を嵌め込むのに必要な最小限の大きさに設定されると共に、上下に高低差をつけて２つのサスペンション９，９’を設置するために、高低差をつけて形成される。
【００１０】
近年、機器の着信報知の感度良好化への要望が高まるにつれ、振動での着信報知時の更なる振動量の増加が望まれるようになっている。しかしながら、上記構成の多機能型振動体３’では、その構成上図８又は図１０に示すように２つのサスペンション９，９’が鍔部６と重なり合って、鍔部６は挟まれる格好になるため、機械振動系10の上下振動の際、サスペンション９，９’の許容弾性変位量以上に鍔部６が上下に変位することは不可能となる。即ち磁気回路２の上下振動がサスペンション９，９’で抑え込まれる形になるため、大きな振動量が取り出しにくかった。
【００１１】
又、前記の通り、鍔部６は耐衝撃用ストッパーの機能も有するため、ある程度の強度を得る必要がある。従って、厚みを一定以上薄くすることは困難であり、このことも磁気回路２の上下振動量を制限する原因の一つとなっていた。
【００１２】
そこで、振動量を増加させるために、図１２、図１３及び図１４に示すような多機能型発音体３が考案された。図１２は、多機能型発音体３の平面図、図１３は、図１２の多機能型発音体３をC−C線に沿う断面で切断したときの側断面図である。図１２の多機能型発音体３が図８〜１１までの多機能型発音体３’と主に異なる点は、約120度等間隔で磁気回路２の外側に設けられた鍔部６と２つのサスペンション９，９’が互いに重ならないように配置されている点である。このような配置をとるために、図示しない２つのサスペンション９，９’の突片を同一位置に配置して、平面から見て２つのサスペンション９，９’が互いに重なり合うように配置している。このように上下にサスペンション９，９’を配置することにより、鍔部６が入り込む空間18が設けられるので、サスペンション９，９’で磁気ヨーク11を弾性支持しても、鍔部６とサスペンション９，９’が互いに重なり合うこと無く配置することが可能となる。
【００１３】
反面、２つのサスペンション９，９’の突片が同一位置にあるため、円環状の筐体４内周面に上下に２つのサスペンション９，９’を弾性支持するためには、図１３に示すように、突片の間にスペーサ１を設けねばならない。突片は１つのサスペンションに３ヶ所あるので、スペーサも３つ必要である。しかし、３つ別々にスペーサを設けることは製造コストがかかるばかりでなく、組み立て効率も低下する。そこで３ヶ所のスペーサを１つに連結形成したリング状のスペーサが使用されている。図１４はリング状スペーサー１と、磁気回路２との構成を示す平面図であり、図１５は鍔部６とスペーサー１の要部拡大図である。。
【００１４】
【発明が解決しようとする課題】
図１２、図１３の多機能型発音体３を組み込んだ機器を使用者が誤って落とすと、多機能型発音体３は外力による衝撃を受ける。その時、前記鍔部６の突出方向（図１４矢印Ｙ方向、つまり120度等間隔方向）に衝撃が加わった場合は、図１５に示すように鍔部６先端とスペーサー１との隙間ｄ１は充分小さいため、鍔部６がストッパーの役目を果たして機械振動系10の過大変位を防止する。
【００１５】
しかし、実際の使用下ではそれ以外のラジアル方向（図１４中の矢印Ｙ以外のあらゆる方向）に衝撃が加わる場合がほとんどで、この場合、鍔部６とスペーサー１との隙間ｄ２はｄ１に比べかなり大きくなるため、機械振動系10の過大変位量も予想外に大きくなる。従って、その変位量による衝撃でサスペンション９，９’が過大に変位して塑性変形を起こし、振動発生の共振特性が劣化したり、筐体４内部で部品同士が接触して動作中に擦過音を生じたりすることがあった。
【００１６】
更に、上記構成の多機能型発音体３では、筐体４内周面にスペーサー１という別部材を新たに設ける必要があるため、図８〜１１の多機能型振動体３’のように筐体４’内周面に凹部17を設けることは不可能であった。
【００１７】
【課題を解決するための手段】
上記の課題を解決するため、本発明の請求項１記載の発明は、電流印加用のボイスコイルと、前記ボイスコイルを片面で支持するダイアフラムと、少なくとも１つのマグネット及び前記マグネットを保持する磁気ヨークとから形成される磁気回路及び前記磁気ヨークを弾性支持するサスペンションとを含む機械振動系と、前記磁気回路の磁気空隙に前記ボイスコイルを挿入して、前記ダイアフラムと前記磁気回路とを互いに面対向で支持する円環状の筐体と、前記磁気回路の外側に設けられ、前記外側より前記筐体の内周面に向けて突出する鍔部と、前記筐体の内周面に設けられたスペーサーと、前記鍔部に当接することによって、前記筐体の中心線と直交する面上で生じる前記磁気回路及び磁気ヨークの回転方向（ラジアル方向）の変位を前記サスペンションの弾性変形域内に制限するように、前記スペーサーの内周面に形成された複数の突起部と、を備えることで、前記ボイスコイル−機械振動系の接触を妨げる多機能型発音体を提供するものである。
【００１８】
又、本発明の請求項２記載の発明は、電流印加用のボイスコイルと、前記ボイスコイルを片面で支持するダイアフラムと、少なくとも１つのマグネット及び前記マグネットを保持する磁気ヨークとから形成される磁気回路及び前記磁気ヨークを弾性支持するサスペンションとを含む機械振動系と、前記磁気回路の磁気空隙に前記ボイスコイルを挿入して、前記ダイアフラムと前記磁気回路とを互いに面対向で支持する円環状の筐体と、前記磁気回路の外側に設けられ、前記外側より前記筐体の内周面に向けて突出する鍔部と、前記筐体の内周面に設けられたスペーサーと、前記鍔部に当接することによって、前記筐体の中心線と直交する面上で生じる磁気回路及び磁気ヨークの回転方向（ラジアル方向）の変位を前記サスペンションの弾性変形域内に制限するように、前記スペーサーの内周面に形成された複数の凹部と、を備えることで、前記ボイスコイル−機械振動系の接触を妨げる多機能型発音体を提供する。
【００１９】
以上のように多機能発音体を構成することにより、振動量の増加を図りながら、衝撃時に機械振動系が大きく変位しようとしても、鍔部がスペーサーの突起部又は凹部に当接して変位が防止されるので、サスペンションやコイルの変形及び破損等を防止できる。これにより、発音と振動の二つの作用をする多機能型発音体であって信頼性の高いものが、簡単な構造で廉価に実現できる。
【００２０】
又、本発明の請求項３記載の発明は、請求項１又は請求項２のいずれかに記載の多機能型発音体を搭載する携帯端末機である。
【００２１】
【発明の実施の形態】
（実施例１）
以下、図面に基づいて本発明の第１の実施例を説明する。図１は本実施例の主要部であるスペーサー１aと、磁気回路２との構成を示す平面図であり、図２は図１のスペーサー１aと磁気回路２を搭載した多機能型発音体３の平面図、図３は図２の多機能型発音体３をA−A線に沿う断面で切断したときの側断面図、図４は、図２の多機能型発音体３が衝撃力を受けて、磁気回路２が大きくラジアル方向に変位しようとするときの状態を示す平面図である。
【００２２】
本実施例の多機能型発音体の構造については、図１１〜図１３に示す従来例の多機能型発音体と異なる点についてのみ説明し、従来例と同じ構成部品については同じ番号を付し、重複した記載は省略する。図１において、本実施例の多機能型発音体３が従来例と異なる点は、筐体４内周面に設置されるスペーサ１aの内周面に、複数の突起部５を設けて、鍔部６をその突起部５内に位置させて収納した点である。
【００２３】
図２，３に示す多機能型発音体３の基本的な動作は従来例と同じで、ダイアフラム７に接合されたボイスコイル８に可聴周波数の信号電流を流すと、ダイアフラム７が振動してブザー音、メロディ、音声等の可聴音を発し、それより低い周波数の信号を用いると、磁気回路２とサスペンション９，９’とを含む機械振動系10が振動し、この振動が筐体４を経てこの多機能型発音体３を搭載した機器に伝わるものである。
【００２４】
上記のようなスペーサー１aを使用することにより、多機能発音体３がラジアル方向（図３の筐体４中心線方向に垂直な方向）に衝撃力を受けて磁気回路２が図４の破線で表すように、大きくラジアル方向に変位しようとすると、鍔部６が突起部５に当接して磁気回路２の過大なラジアル方向の変位が防止されるため、機械振動系10のラジアル方向の変位が防止される。従ってサスペンション９，９’の塑性変形や、磁気ヨーク11やポールピース12がボイスコイル８に衝突して、ボイスコイル８が変形したり破損したりすること等を防止できる。
【００２５】
更に、上記のようなスペーサー１aを使用することで、機械振動系10の変位を防止しながら、２つのサスペンション９，９’と鍔部６とを互いに重ならないように配置できるため、機械振動系10の上下振動の際、鍔部６の上下変位量がサスペンション９，９’に抑止されない。従って、機械振動系10を大きく上下に振動させられるため、振動量を増加することも可能となる。
【００２６】
（実施例２）
次に、図５、図６及び図７に基づいて本発明の第２の実施例を説明する。図５は本実施例の主要部であるスペーサー１bと、磁気回路２との構成を示す平面図であり、図６は図５のスペーサー１bと磁気回路２とを搭載した多機能型発音体３の側断面図であり、図７は、図６の多機能型発音体３が衝撃力を受けて、磁気回路２が大きくラジアル方向に変位しようとするときの状態を示す平面図である。
【００２７】
本実施例の多機能型発音体３の構造については第１の実施例の多機能型発音体３と異なる点についてのみ説明し、同じ構成部品については同じ番号を付し、重複した記載は省略する。図５において、本実施例の多機能型発音体３が第１の実施例と異なる点は、筐体４内周面に設置されるスペーサー１bの内周面に、凹部13を設けて、鍔部６をその凹部13内に位置させて収納した点と、鍔部６をスペーサー１b内周面より更に外側に向かって延設した点、及び鍔部６の延長に伴い図６に示すように筐体４の内周面とカバー15の外周縁を鍔部６に当接しないように形成した点である。
【００２８】
このように構成することによって、多機能発音体３がラジアル方向（図６の筐体４中心線方向に垂直な方向）に衝撃力を受けて磁気回路２が図７の破線で表すように、大きくラジアル方向に変位しようとすると、鍔部６が凹部13に当接して磁気回路２の過大なラジアル方向の変位が防止されるため、機械振動系10のラジアル方向の変位が防止される。よって機械振動系10の振動量増加と、ラジアル方向変位の防止を図りつつ、鍔部６をスペーサー１b内周面より更に外側に向かって延設できるため、その分機械振動系10の全体重量を増加することができる。よって振動エネルギーをより大きくすることができるものである。
【００２９】
【発明の効果】
以上の説明から明らかなように、本発明の多機能型発音体によれば、磁気回路の振動量の増加を図りながら、万が一の落下による衝撃時に、機械振動系が大きくラジアル方向に変位しようとしても、鍔部がスペーサーの突起部に当接してその変位拡大を防止するので、サスペンションやコイルの変形及び破損等を防止できる。これにより、発音と振動の二つの作用をする多機能型発音体であって信頼性の高いものが、簡単な部品構造で廉価に実現できるのである。
【００３０】
又、スペーサー内周面に凹部を設けて、そこに鍔部を収納することにより、上記効果に加え、鍔部をより大きく設けて、その分機械振動系の全体質量を増加することで振動エネルギーをより大きくすることができるものである。
【図面の簡単な説明】
【図１】実施例１の主要部であるスペーサーと、磁気回路との構成を示す平面図
【図２】図１のスペーサーと磁気回路を搭載した多機能型発音体の平面図
【図３】図２の多機能型発音体をA−A線に沿う断面で切断したときの側断面図
【図４】図２の多機能型発音体が衝撃力を受けて、磁気回路２が大きくラジアル方向に変位しようとするときの状態を示す平面図
【図５】実施例２の主要部であるスペーサーと、磁気回路との構成を示す平面図
【図６】図５のスペーサーと磁気回路とを搭載した多機能型発音体の側断面図
【図７】図６の多機能型発音体が衝撃力を受けて、磁気回路２が大きくラジアル方向に変位しようとするときの状態を示す平面図
【図８】従来例の多機能型発音体を示した分解斜視図
【図９】図８の多機能型振動体をダイアフラム側から見た平面図
【図１０】図９の多機能型発音体のカバー取外し状態を示す底面図
【図１１】図９をB−B線に沿う断面で切断したときの側断面図
【図１２】他の従来例の多機能型発音体の平面図
【図１３】図１２の多機能型発音体をC−C線に沿う断面で切断したときの側断面図
【図１４】従来例のスペーサーと、磁気回路との構成を示す平面図
【図１５】図１４の鍔部とスペーサーの要部拡大図
【符号の説明】
１，１a，１ｂ・・・スペーサー
２・・・磁気回路
３，３’・・・多機能型発音体
４，４’・・・筐体
４’a，４’b・・・切欠段部
５・・・突出部
６・・・鍔部
７・・・ダイアフラム
８・・・ボイスコイル
９，９’・・・サスペンション
９a，９b，９ｃ，９’a，９’b，９’c・・・突片
10・・・機械振動系
11，11’・・・磁気ヨーク
12・・・ポールピース
13・・・凹部
14・・・マグネット
15・・・カバー
16・・・給電端子
17・・・凹部
18・・・空間[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a multi-function sound generator device that is mounted on a portable terminal (hereinafter referred to as a device) such as a cellular phone or a small information communication terminal and notifies a user of an incoming call by sound or vibration.
[0002]
[Prior art]
The device is generally configured so that it can be switched between generating a buzzer sound or a melody sound to notify the user of an incoming call, or generating a vibration in silent mode without generating a sound. Both the sound generating body for generating sound similar to a small speaker and the vibration body for generating vibration in which an eccentric weight is rotated by a small motor are mounted. The mounting of both the sounding body and the vibrating body in this way has been disadvantageous in terms of time and effort in the mounting process and in the miniaturization and weight reduction of the device. Multifunctional sounding bodies that generate both vibrations have been proposed.
[0003]
8 is an exploded perspective view showing the conventional multi-function sounding body, FIG. 9 is a plan view of the multi-function vibrating body of FIG. 8 viewed from the diaphragm 7, and FIG. 10 is a multi-function sounding body of FIG. FIG. 11 is a bottom view showing a state where the cover 15 is removed, and FIG. 11 is a side cross-sectional view of FIG. 9 taken along the line BB.
[0004]
As shown in FIG. 8, the conventional multi-function sound generator includes an annular voice coil 8, a diaphragm 7 that joins and supports the voice coil 8 on one side, a disk-shaped magnet 14 for forming the magnetic circuit 2, and A saucer-shaped magnetic yoke 11 ′ holding the magnet 14, a disk-shaped pole piece 12 stacked on the upper side of the magnetic yoke 11 ′, and a ring-shaped leaf spring that elastically supports the magnetic yoke 11 ′ on both upper and lower end surfaces. Suspensions 9, 9 ', a metal bottom cover 15, and an annular casing 4' for assembling these components.
[0005]
As shown in FIG. 11, the diaphragm 7 and the cover 15 are supported and fixed to the casing 4 'at the outer peripheral edges thereof, while the suspensions 9 and 9' are spaced apart from each other by about 120 degrees as shown in FIG. The projecting pieces 9a, 9b, 9c, 9'a, 9'b, 9'c provided in step 2 are provided in the frame of the housing 4 'with two types of cutout step portions 4'a or 4 It is fitted and glued to 'b, and elastically supported. Further, the voice coil 8 is inserted and installed in the magnetic gap of the magnetic circuit 2, and as a result, the diaphragm 7 and the magnetic circuit 2 are assembled in the casing 4 'so as to face each other.
[0006]
With this structure, when a current having a certain frequency is applied to the voice coil 8 from the power supply terminal 16, an electromagnetic force is generated between the coil 8, the magnetic circuit 2 constituted by the magnet 14, the magnetic yoke 11 ′, and the pole piece 12. Works and repeats magnetic attraction and repulsion with each other to start vibration. At this time, if the current frequency is high to some extent and is in the audible frequency range, the vibration of the diaphragm 7 to which the coil 8 is joined increases, and the vibration generates audible sounds such as a buzzer sound, melody sound, and voice.
[0007]
On the other hand, the suspensions 9 and 9 'hardly vibrate because of their lower natural frequency. If the current frequency is relatively low below the audible frequency range, the diaphragm 7 will not vibrate and no sound will be produced. Instead, the suspensions 9 and 9 'to which the magnetic circuit 2 is fixed will vibrate. Then, the mechanical vibration system 10 composed of the magnetic circuit 2 and the suspensions 9 and 9 ′ vibrates, and the vibration energy increases due to the entire mass of the vibration system 10, so that the generated vibration is transmitted through the housing 4 ′. The message is transmitted to a device (not shown) equipped with the multi-function sounding body 3 'to notify the user of an incoming call. In this way, one sounding body performs two kinds of operations, sounding and vibration.
[0008]
From the outer peripheral wall of the magnetic yoke 11 ′ of the mechanical vibration system 10, which is a vibration generation source, the flange portion 6 is provided so as to protrude toward the inner peripheral surface of the housing 4 ′ at equal intervals of about 120 degrees. The flange 6 is a stopper that prevents an impact caused by contact between the magnetic yoke 11 ′ and the housing 4 ′, and the entire thickness of the magnetic yoke 11 ′ is reduced while keeping the mass of the magnetic yoke 11 ′ constant. It is also provided to do.
[0009]
As shown in FIG. 10, the flange 6 is accommodated in a recess 17 provided on the inner peripheral surface of the housing 4 ′. The concave portion 17 is a relief portion that suppresses the diameter width of the housing 4 ′, and at the same time, is a stopper that restricts the displacement of the flange portion 6 in a radial direction with respect to the center line direction of the housing 4 ′. By preventing the displacement, deformation of the suspensions 9, 9 'and the coil 8 can be prevented in advance. In order to provide this concave portion 17, the notch step portions 4'a and 4'b are set to a minimum size necessary for fitting the projecting pieces, and the two suspensions 9 are provided with a vertical difference in height. In order to install 9 ', it is formed with a height difference.
[0010]
In recent years, as the demand for improving the sensitivity of incoming notification of devices has increased, further increase in the amount of vibration at the time of incoming notification by vibration has been desired. However, in the multi-function vibrating body 3 ′ having the above configuration, as shown in FIG. 8 or FIG. 10, the two suspensions 9 and 9 ′ overlap with the flange portion 6 so that the flange portion 6 is sandwiched. Therefore, when the mechanical vibration system 10 is vibrated up and down, it is impossible for the collar portion 6 to be displaced up and down more than the allowable elastic displacement amount of the suspensions 9 and 9 ′. That is, since the vertical vibration of the magnetic circuit 2 is suppressed by the suspensions 9, 9 ', a large amount of vibration is difficult to take out.
[0011]
Further, as described above, since the collar part 6 also has a function of an impact resistant stopper, it is necessary to obtain a certain degree of strength. Therefore, it is difficult to reduce the thickness beyond a certain level, which is one of the causes for limiting the vertical vibration amount of the magnetic circuit 2.
[0012]
Therefore, in order to increase the amount of vibration, a multifunctional sounding body 3 as shown in FIGS. 12, 13, and 14 has been devised. FIG. 12 is a plan view of the multi-function sound generator 3, and FIG. 13 is a side cross-sectional view of the multi-function sound generator 3 of FIG. 12 taken along the line CC. The multifunctional sounding body 3 in FIG. 12 is mainly different from the multifunctional sounding body 3 ′ in FIGS. 8 to 11 in that the flanges 6 and 2 provided outside the magnetic circuit 2 at equal intervals of about 120 degrees. The two suspensions 9, 9 'are arranged so as not to overlap each other. In order to take such an arrangement, projecting pieces of two suspensions 9 and 9 '(not shown) are arranged at the same position, and the two suspensions 9 and 9' are arranged so as to overlap each other when viewed from above. By disposing the suspensions 9 and 9 'above and below in this manner, a space 18 into which the flange portion 6 enters is provided. Therefore, even if the magnetic yoke 11 is elastically supported by the suspensions 9 and 9', the flange portion 6 and the suspension 9 are provided. , 9 'can be arranged without overlapping each other.
[0013]
On the other hand, since the projecting pieces of the two suspensions 9 and 9 'are at the same position, in order to elastically support the two suspensions 9 and 9' up and down on the inner peripheral surface of the annular housing 4, as shown in FIG. Thus, the spacer 1 must be provided between the projecting pieces. Since there are three protrusions on one suspension, three spacers are also required. However, providing three separate spacers not only increases the manufacturing cost, but also reduces the assembly efficiency. Therefore, a ring-shaped spacer in which three spacers are connected and formed in one is used. FIG. 14 is a plan view showing the configuration of the ring-shaped spacer 1 and the magnetic circuit 2, and FIG. 15 is an enlarged view of the main part of the flange 6 and the spacer 1. .
[0014]
[Problems to be solved by the invention]
If the user accidentally drops the device incorporating the multifunctional sounding body 3 of FIGS. 12 and 13, the multifunctional sounding body 3 receives an impact due to external force. At that time, when an impact is applied in the protruding direction of the flange portion 6 (the arrow Y direction in FIG. 14, that is, the direction at equal intervals of 120 degrees), the gap d1 between the distal end of the flange portion 6 and the spacer 1 is sufficient as shown in FIG. Since it is small, the flange 6 serves as a stopper to prevent excessive displacement of the mechanical vibration system 10.
[0015]
However, in actual use, an impact is often applied in other radial directions (any direction other than the arrow Y in FIG. 14), and in this case, the gap d2 between the flange 6 and the spacer 1 is larger than d1. Since it becomes considerably large, the excessive displacement amount of the mechanical vibration system 10 also becomes unexpectedly large. Accordingly, the suspension 9, 9 ′ is excessively displaced by the impact due to the displacement, causing plastic deformation, and the resonance characteristics of vibration generation are deteriorated. Sometimes occurred.
[0016]
Further, in the multi-function sounding body 3 having the above-described structure, it is necessary to newly provide another member called the spacer 1 on the inner peripheral surface of the housing 4, so that a housing like the multi-function vibrating body 3 ′ in FIGS. It was impossible to provide the recess 17 on the inner peripheral surface of the body 4 '.
[0017]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention includes a voice coil for applying current, a diaphragm for supporting the voice coil on one side, at least one magnet and a magnetic yoke for holding the magnet. A mechanical vibration system including a magnetic circuit formed from a magnetic suspension and a suspension that elastically supports the magnetic yoke; and the voice coil is inserted into a magnetic gap of the magnetic circuit so that the diaphragm and the magnetic circuit face each other. A ring-shaped housing supported at the outer periphery, a flange provided on the outer side of the magnetic circuit and projecting from the outer side toward the inner peripheral surface of the housing, and a spacer provided on the inner peripheral surface of the housing And a displacement in the rotational direction (radial direction) of the magnetic circuit and the magnetic yoke generated on a surface orthogonal to the center line of the housing by abutting against the flange portion. So as to limit the elastic deformation region of the serial suspension in Rukoto and a plurality of protrusions formed on the inner peripheral surface of the spacer, the voice coil - prevent the contact of the mechanical vibration system multifunctional sounding body Is to provide.
[0018]
According to a second aspect of the present invention, there is provided a magnetic coil formed of a voice coil for applying an electric current, a diaphragm for supporting the voice coil on one side, at least one magnet and a magnetic yoke for holding the magnet. A mechanical vibration system including a circuit and a suspension that elastically supports the magnetic yoke; and an annular ring that supports the diaphragm and the magnetic circuit in a face-to-face relationship by inserting the voice coil into a magnetic gap of the magnetic circuit. A housing, a flange provided outside the magnetic circuit, protruding from the outside toward the inner peripheral surface of the housing, a spacer provided on the inner peripheral surface of the housing, and the flange By abutting, the displacement in the rotational direction (radial direction) of the magnetic circuit and magnetic yoke generated on the surface orthogonal to the center line of the casing is changed by the elastic change of the suspension. To limit the region, a plurality of recesses formed on the inner peripheral surface of the spacer, by obtaining Bei, said voice coil - providing interfering contact mechanical vibration system multifunction sounding body.
[0019]
By constructing a multi-functional sounding body as described above, even if the mechanical vibration system is about to be displaced greatly during an impact while the amount of vibration is increased, the collar prevents the displacement by contacting the protrusion or recess of the spacer. Therefore, the suspension and coil can be prevented from being deformed and damaged. As a result, a multi-function type sounding body having two functions of sound generation and vibration and having high reliability can be realized at a low cost with a simple structure.
[0020]
According to a third aspect of the present invention, there is provided a portable terminal equipped with the multi-function sound generator according to the first or second aspect.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Example 1
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing the configuration of the spacer 1a, which is the main part of the present embodiment, and the magnetic circuit 2. FIG. 2 shows a multifunction sounding body 3 on which the spacer 1a and the magnetic circuit 2 of FIG. FIG. 3 is a side sectional view of the multi-functional sounding body 3 of FIG. 2 taken along the line AA, and FIG. 4 is a side view of the multi-functional sounding body 3 of FIG. FIG. 6 is a plan view showing a state when the magnetic circuit 2 is about to be largely displaced in the radial direction.
[0022]
The structure of the multifunctional sounding body of the present embodiment will be described only with respect to the differences from the multifunctional sounding body of the conventional example shown in FIGS. 11 to 13, and the same components as those of the conventional example are denoted by the same reference numerals. The duplicate description is omitted. In FIG. 1, the multifunctional sounding body 3 of this embodiment is different from the conventional example in that a plurality of protrusions 5 are provided on the inner peripheral surface of the spacer 1 a installed on the inner peripheral surface of the housing 4. This is the point where the portion 6 is stored in the protruding portion 5.
[0023]
The basic operation of the multi-function sound generator 3 shown in FIGS. 2 and 3 is the same as that of the conventional example. When an audio frequency signal current is passed through the voice coil 8 joined to the diaphragm 7, the diaphragm 7 vibrates and the buzzer is activated. When an audible sound such as sound, melody or voice is emitted and a signal having a lower frequency is used, the mechanical vibration system 10 including the magnetic circuit 2 and the suspensions 9 and 9 ′ vibrates, and this vibration passes through the housing 4. The information is transmitted to a device equipped with the multi-function sound generator 3.
[0024]
By using the spacer 1a as described above, the multi-function sound generator 3 receives an impact force in the radial direction (direction perpendicular to the center line direction of the housing 4 in FIG. 3), and the magnetic circuit 2 is indicated by the broken line in FIG. As shown, since the flange portion 6 abuts against the protruding portion 5 to prevent the magnetic circuit 2 from being excessively displaced in the radial direction if the radial direction is largely displaced, the displacement of the mechanical vibration system 10 in the radial direction is prevented. Is prevented. Therefore, it is possible to prevent the suspensions 9 and 9 'from being plastically deformed, the magnetic yoke 11 and the pole piece 12 colliding with the voice coil 8, and the voice coil 8 from being deformed or damaged.
[0025]
Further, by using the spacer 1a as described above, the two suspensions 9, 9 'and the flange portion 6 can be arranged so as not to overlap each other while preventing the displacement of the mechanical vibration system 10, so that the mechanical vibration system In the case of 10 vertical vibrations, the vertical displacement of the flange 6 is not restrained by the suspensions 9 and 9 ′. Therefore, since the mechanical vibration system 10 can be vibrated greatly up and down, the amount of vibration can be increased.
[0026]
(Example 2)
Next, a second embodiment of the present invention will be described based on FIG. 5, FIG. 6 and FIG. FIG. 5 is a plan view showing the configuration of the spacer 1b and the magnetic circuit 2 which are the main parts of this embodiment, and FIG. 6 is a multifunctional sounding body 3 on which the spacer 1b and the magnetic circuit 2 of FIG. FIG. 7 is a plan view showing a state when the multi-functional sounding body 3 of FIG. 6 receives an impact force and the magnetic circuit 2 is about to be displaced in the radial direction.
[0027]
The structure of the multifunctional sounding body 3 of the present embodiment will be described only with respect to the differences from the multifunctional sounding body 3 of the first embodiment, the same components will be assigned the same numbers, and duplicate descriptions will be omitted. To do. In FIG. 5, the multifunctional sounding body 3 of this embodiment is different from that of the first embodiment in that a recess 13 is provided on the inner peripheral surface of the spacer 1b installed on the inner peripheral surface of the housing 4 and As shown in FIG. 6, the portion 6 is housed while being positioned in the recess 13, the flange portion 6 is extended further outward from the inner peripheral surface of the spacer 1 b, and the extension of the flange portion 6. The inner peripheral surface of the housing 4 and the outer peripheral edge of the cover 15 are formed so as not to come into contact with the flange portion 6.
[0028]
With this configuration, the multi-function sound generator 3 receives an impact force in the radial direction (direction perpendicular to the center line direction of the housing 4 in FIG. 6), and the magnetic circuit 2 is represented by a broken line in FIG. If it is attempted to largely displace in the radial direction, the flange portion 6 comes into contact with the recess 13 to prevent excessive displacement of the magnetic circuit 2 in the radial direction, so that displacement of the mechanical vibration system 10 in the radial direction is prevented. Therefore, the flange portion 6 can be extended further outward from the inner peripheral surface of the spacer 1b while increasing the vibration amount of the mechanical vibration system 10 and preventing displacement in the radial direction, so that the overall weight of the mechanical vibration system 10 is increased accordingly. Can be increased. Therefore, vibration energy can be further increased.
[0029]
【The invention's effect】
As is clear from the above description, according to the multi-function sounding body of the present invention, the mechanical vibration system tends to be greatly displaced in the radial direction in the event of an impact due to an accidental drop while increasing the amount of vibration of the magnetic circuit. In addition, since the flange portion abuts against the protrusion portion of the spacer to prevent the displacement from expanding, the suspension and the coil can be prevented from being deformed or damaged. As a result, a multi-function sounding body having two functions of sound generation and vibration and having high reliability can be realized at a low cost with a simple component structure.
[0030]
In addition to the above effects, a recess is provided on the inner circumferential surface of the spacer, and in addition to the above effects, a larger ridge is provided to increase the overall mass of the mechanical vibration system. Can be made larger.
[Brief description of the drawings]
FIG. 1 is a plan view showing a configuration of a spacer and a magnetic circuit, which are main parts of Example 1. FIG. 2 is a plan view of a multi-function sounding body equipped with the spacer and magnetic circuit of FIG. FIG. 4 is a sectional side view of the multi-function sound generator of FIG. 2 taken along the line A-A. FIG. 4 shows that the multi-function sound generator of FIG. FIG. 5 is a plan view showing a configuration of a spacer and a magnetic circuit as main parts of the embodiment 2. FIG. 6 is mounted with the spacer and the magnetic circuit of FIG. FIG. 7 is a plan view showing a state in which the multi-functional sounding body of FIG. 6 is subjected to an impact force and the magnetic circuit 2 is about to be displaced in the radial direction. 8] An exploded perspective view showing a multifunctional sounding body of a conventional example. [FIG. 9] The multifunctional vibrating body of FIG. FIG. 10 is a bottom view showing a state where the cover of the multifunctional sounding body of FIG. 9 is removed. FIG. 11 is a side sectional view of FIG. 9 taken along the line B-B. 12 is a plan view of another conventional multi-functional sounding body. FIG. 13 is a side cross-sectional view of the multi-functional sounding body of FIG. 12 taken along the line CC. FIG. FIG. 15 is a plan view showing the configuration of the spacer and the magnetic circuit. FIG. 15 is an enlarged view of the main part of the collar and the spacer in FIG.
DESCRIPTION OF SYMBOLS 1, 1a, 1b ... Spacer 2 ... Magnetic circuit 3, 3 '... Multi-function type sounding body 4, 4' ... Case 4'a, 4'b ... Notch step part 5 ... Projection 6 ... Bridge 7 ... Diaphragm 8 ... Voice coils 9, 9 '... Suspension 9a, 9b, 9c, 9'a, 9'b, 9'c ... Protrusion
10 ... Mechanical vibration system
11, 11 '... Magnetic yoke
12 ... Pole piece
13 ... Recess
14 ・・・ Magnet
15 ... Cover
16 ... Power supply terminal
17 ... Recess
18 ... space

Claims

A voice coil for current application;
A diaphragm that supports the voice coil on one side;
A mechanical vibration system including a magnetic circuit formed of at least one magnet and a magnetic yoke that holds the magnet, and a suspension that elastically supports the magnetic yoke;
An annular housing that inserts the voice coil into a magnetic gap of the magnetic circuit and supports the diaphragm and the magnetic circuit facing each other; and
A collar provided on the outside of the magnetic circuit and protruding from the outside toward the inner peripheral surface of the housing;
A spacer provided on the inner peripheral surface of the housing;
By abutting the flange, the displacement of the magnetic circuit and the magnetic yoke, which occur on the surface perpendicular to the center line of the housing, is limited within the elastic deformation region of the suspension. A plurality of protrusions formed on the peripheral surface;
By obtaining Bei, said voice coil - prevent the contact of the mechanical vibration system multifunction sounding body.

A voice coil for current application; a diaphragm for supporting the voice coil on one side; a magnetic circuit formed of at least one magnet and a magnetic yoke for holding the magnet; and a suspension for elastically supporting the magnetic yoke. A mechanical vibration system, an annular housing that inserts the voice coil into a magnetic gap of the magnetic circuit, and supports the diaphragm and the magnetic circuit facing each other; and provided outside the magnetic circuit; A flange protruding from the outside toward the inner peripheral surface of the casing, a spacer provided on the inner peripheral surface of the casing, and abutting on the flange, thereby being orthogonal to the center line of the casing A shape is formed on the inner peripheral surface of the spacer so as to limit the displacement in the rotational direction of the magnetic circuit and magnetic yoke generated on the surface to be moved within the elastic deformation region of the suspension. In Rukoto comprising a plurality of recesses, wherein the voice coil - prevent the contact of the mechanical vibration system multifunction sounding body.

A portable terminal equipped with the multifunctional sounding body according to claim 1.