JPS5863299A - Speaker giving approximately even driving force to entire surface of plane diaphragm - Google Patents

Abstract

PURPOSE:To give an approximately even driving force to the entire surface of a plane diaphragm, realize an extremely small distorsion, by forming a magnetic circuit in a m-row/n-column matrix and vertically to the diaphragm. CONSTITUTION:A magnetic circuit is formed with 16 units of magnets and voice coils respectively on a plane diaphragm 4 in a 4-row/4-column matrix. For the magnets on a certain row, N and S are alternately put into the voice coils. The wiring directions of the voice coils are set so that the forces acting on all voice coils have the same direction. Each voice coil is driven in parallel and can give approximately even force to the diaphragm 4.

Description

【発明の詳細な説明】 本願は、平面振動板全面に対して均一に近い駆動力を与
えた極小歪みスピーカーに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present application relates to an extremely low distortion speaker that applies nearly uniform driving force to the entire surface of a flat diaphragm.

最近、コーン型スピーカーに比べ、歪みの小さい平面振
動板スピーカーが開発された。このスピーカーは振動板
の背面で５個の駆動ユーット（従来のスピーカー駆動装
置）で５か所（中央と四隅）を駆動している。このスピ
ーカーは振動板が平面であるのでコーン型スピーカーに
比べ、位相歪は改良されている。また振動板面上にでき
る節や腹（波動でいう節や腹である。即ち、振動板面」
二で振幅の大きい所と振幅が非常に小さい所ができる）
のできる度合いは振動板がハニカ・ム構造体で造られて
いるという理由から、コーン型に比べ小さい。Recently, flat diaphragm speakers have been developed that have lower distortion than cone speakers. This speaker uses five drive units (conventional speaker drive devices) to drive five locations (center and four corners) on the back of the diaphragm. Since this speaker has a flat diaphragm, phase distortion is improved compared to cone speakers. Also, nodes and antinodes (nodes and antinodes in terms of waves, i.e., the diaphragm surface) that occur on the diaphragm surface.
2 creates areas with large amplitude and areas with very small amplitude)
Because the diaphragm is made of a honeycomb structure, the degree of vibration is smaller than that of a cone type.

しかしながら、依然として節や腹は存在している。However, nodes and belly still exist.

即ち、振動板面は寄生振動が存在している。That is, parasitic vibration exists on the diaphragm surface.

本発明は、振動板面上の寄生振動をなくす為、振動板全
体にわたって、均一に近い駆動力を与えるものである。The present invention provides nearly uniform driving force over the entire diaphragm in order to eliminate parasitic vibrations on the diaphragm surface.

その構造は特許請求の範囲のところで説明している。そ
の動作原理を図で説明する。Its structure is explained in the claims. The principle of operation will be explained with a diagram.

１図はマグネットを１６個使った場合、スピーカーの軸
に垂直な断面での磁気回路の四角柱の磁極と、各ボイス
コイルに流れる信号電流の、ある瞬間における電流方向
（１図、４図、５図の図中の矢印は電流方向を示す）の
関係を示す。図中のＳ、Ｎは磁極の極性を示す。この図
かられかるように、各ボイスコイルは同じ方向に力を受
ける、。２図はスピーカーの軸に平行で、且つマグネッ
トの並びに平行な断面での概略図を示す。四角筒のボビ
ン１にボイスコイル２を巻いたユニット（３図）が接着
剤３で接着され、それに振動板４が接着される。磁気回
路はマグネット６、磁気回路平板７、マグネット、磁気
回路四角柱５、向い合う磁気回路の隙間（ボイスコイル
がはいる空間）、磁気回路四角柱でループが形成される
。こういう磁気回路が多数形成される（１図の磁気回路
四角柱の磁極配列参照）。この図のように、各ボイスコ
イルは並列駆動され、平面振動板全体に対して均一に近
い駆動力を与える。次に振動系の作製の手順を述べる。Figure 1 shows the current direction (Figures 1, 4, The arrows in FIG. 5 indicate the current direction). S and N in the figure indicate the polarity of the magnetic poles. As you can see from this figure, each voice coil receives a force in the same direction. Figure 2 shows a schematic cross-section parallel to the axis of the speaker and parallel to the arrangement of the magnets. A unit (Figure 3) in which a voice coil 2 is wound around a rectangular bobbin 1 is adhered with an adhesive 3, and a diaphragm 4 is adhered to it. A loop is formed in the magnetic circuit by the magnet 6, the magnetic circuit flat plate 7, the magnet, the magnetic circuit square column 5, the gap between the opposing magnetic circuits (the space in which the voice coil is inserted), and the magnetic circuit square column. A large number of such magnetic circuits are formed (see the magnetic pole arrangement of the square prism of the magnetic circuit in Figure 1). As shown in this figure, each voice coil is driven in parallel to provide nearly uniform driving force to the entire plane diaphragm. Next, we will describe the procedure for creating the vibration system.

３図のユニットを一列に接着したものが４図であり、ボ
イスコイルを直列接続（直列接続点８）する。４図のも
のを更に接着し、振動板を接着したものが５図であり、
直２列接続されたボイスコイルは更に並列接続（並列接
続点９）される。Figure 4 shows the units in Figure 3 glued together in a row, and the voice coils are connected in series (series connection point 8). Figure 5 shows the one in Figure 4 further glued together and the diaphragm attached.
The voice coils connected in two series are further connected in parallel (parallel connection point 9).

端子１０は入力端子へリード線で接続される。Terminal 10 is connected to an input terminal by a lead wire.

本発明のスピーカーは中音用、低音用として適し−でい
ると思われる。低音用の場合、重量の間係１−１大きな
スピーカーを造ることが適切でない場合は、ある程度の
大きさで造り、適当な大きさのホーンを付けた形にする
ことに依り、低音での効率を−１・、けられるだろう。The speaker of the present invention is considered to be suitable for medium and low sounds. In the case of bass, if it is not appropriate to make a large speaker, the efficiency in bass can be improved by making it a certain size and attaching a horn of an appropriate size. -1・, you will be kicked.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図：動作原理を示す為のスピーカーの軸に垂直な断
面図、第２図ニスビーカーの軸に平行で、■、つマグネ
ットの並びに平行な断面図、第３図；ボビンにボイスコ
イルを巻いた斜視図、第４図：第３図のユニットを一列
に接着した斜視図、第５図：第３図のユニットを４行４
列に接着し、それに振動板を接着した斜視図。 １図 ３図 ８３ 許庁り 事件Ｃ 発明Ｃ 補正不 事件２ 住辺 補正（ 補正（ ５図 手続補正書（自発） 昭和５７年１０月４１１ ２宮殿 ）表示　　昭和５６年特許願第１６３３２４号）名称　
　平面振動板全面に対して均一に近い駆動力を与えるス
ピーカー ニする者 二の関係　特許出願人Figure 1: A sectional view perpendicular to the axis of the speaker to show the operating principle, Figure 2: A sectional view parallel to the axis of the varnish beaker and parallel to the alignment of the magnets, Figure 3: A voice coil wound around a bobbin. Figure 4: A perspective view of the units in Figure 3 glued together in a row, Figure 5: The units in Figure 3 are arranged in 4 rows and 4
A perspective view of the column and the diaphragm being glued to it. 1 Figure 3 Figure 83 Permission case C Invention C Non-amendment case 2 Sumibe amendment (Amendment (Figure 5 Procedural amendment (voluntary) October 411, 1983 2 palace) Display Patent application No. 163324 of 1982) Name
Relationship between speaker and speaker that provides nearly uniform driving force over the entire surface of a flat diaphragm Patent applicant

Claims (1)

【特許請求の範囲】 適当な厚さの磁気回路物質（例えば純鉄）の四角な平板
の上に、四角柱のマグネットを磁極の極性が交互に逆極
性になるようにして、ｍ行ｎ列に、ある間隔をおいて立
てて接合する。そして、そねそれのマグネットの上端に
、マグネットより断面積（軸に垂直な断面）の大きな四
角柱の磁気回路物質を接合する。そして、これらの個々
の磁気回路物質である四角柱の隣合う隙間、即ち、基盤
の線のようにできる縦横の隙間をボイスコイルに力を与
える空間として利用する。振動系は四角の筒のボビンに
ボイスコイルを巻いたユニット全１１１行ｎ列に接着し
、そのボビンの軸の片端に振動板を接着する。ボイスコ
イルの結線は適当なインビー〆１１ ダンスになるように直列接続と並列接続を組合せ、個々
のボイスコイルに働く力が同一方向になるような極性に
コイルを接続する。 上記は四角柱の磁気回路（マグネットも磁気回路と同じ
四角柱が良い）と四角筒ボビンの組合せについて述べた
が、三角柱と三角筒の組合せ、捷たは六角柱と六角筒の
組合せでもできる。ただし、六角柱の場合においては、
磁極の隣合う面は逆極性ばかりにできず、同じ極性で向
い合う面ができるので理想的でない。[Claims] Square prism magnets are arranged in m rows and n columns on a rectangular flat plate of magnetic circuit material (for example, pure iron) of appropriate thickness so that the polarity of the magnetic poles is alternately reversed. , and then stand and join them at certain intervals. Then, a rectangular prism-shaped magnetic circuit material with a larger cross-sectional area (section perpendicular to the axis) than the magnet is bonded to the upper end of each magnet. The gaps between adjacent rectangular prisms, which are the individual magnetic circuit materials, ie, the vertical and horizontal gaps created like lines on the base, are used as spaces for applying force to the voice coil. The vibration system consists of a unit in which a voice coil is wound around a rectangular cylindrical bobbin, which is glued in all 111 rows and n columns, and a diaphragm is glued to one end of the shaft of the bobbin. The voice coils are connected in series and in parallel so as to have an appropriate impedance, and the coils are connected with polarity so that the forces acting on each voice coil are in the same direction. The above description is about the combination of a square prism magnetic circuit (the magnet should be the same square prism as the magnetic circuit) and a rectangular tube bobbin, but it can also be done with a combination of a triangular prism and a triangular tube, or a combination of a hexagonal prism and a hexagonal tube. However, in the case of a hexagonal prism,
Adjacent surfaces of magnetic poles cannot always have opposite polarities, but they can have opposite surfaces with the same polarity, which is not ideal.