JPS583392A - Speaker device - Google Patents

Abstract

PURPOSE:To prevent the compression of a dynamic range through the compressed linearity, by splitting a conductor arranged in a magnetic gap into two conductors so that the conductors can generate a driving force in adverse direction with each other. CONSTITUTION:A conductor arranged in a magnetic gap of a magnetic circuit is split into two conductors 1 and 1'. With the conductor of a voice coil, the conductors 1 and 1' are separately wound on a coil bobbin. On the other hand, transistors 2 and 2' are biased and constant DC currents IDC and I'DC flows to the conductors 1 and 1' without no signal application to the bases. When an audio signal or a signal with inverted phase is applied to the base, the currents IDC and I'DC are modulated with the signal, resulting that a correct superimposing the audio current with inversed phase on the currents IDC and I'DC respectively is applied to the conductors 1 and 1'. Thus, the total current is constant as 2IDC and the heat generation for the whole device is made constant, preventing change of resistance value.

Description

【発明の詳細な説明】 本発明は、磁気回路の磁気空隙に配した導体に電流を流
すことで駆動力を発生し音を放射する動電型スピーカユ
ニットを有するスピーカ装置に関するものである・ 従来のスピーカ装置のスピーカ為ニットでは、ボイスコ
イルのような導体に音声信号電流を直接法すと、とで駆
動力を発生するよ５Ｋｔつていた。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker device having an electrodynamic speaker unit that generates driving force and radiates sound by passing a current through a conductor arranged in a magnetic gap of a magnetic circuit. In the case of a speaker unit for a speaker device, when an audio signal current is applied directly to a conductor such as a voice coil, a driving force of 5Kt is generated.

ところが、ダイスコイルはそれに電流を流すとジ晶−ル
熱を発生し、この熱によってそれ自体の抵抗値が電流の
大きさに応じて変化すゐ、このため、がイスロイルに誓
声信号が供給され九とき、上記抵抗値の変化のため信号
の変化に忠１１に変化する信号電流がボイスコイルに流
れなくなる。従って、振幅の大きな信号のとき、その振
幅に応じえ音圧を発生するＯＫ必要な駆動力が発生され
な（なｐ。However, when a current is passed through the dice coil, it generates di-crystal heat, and this heat causes its own resistance to change depending on the magnitude of the current.For this reason, the dice coil is unable to supply a vowel signal to the dice coil. When this occurs, the signal current, which changes in accordance with the signal change, no longer flows through the voice coil due to the change in the resistance value. Therefore, when a signal has a large amplitude, the necessary driving force to generate sound pressure corresponding to the amplitude is not generated.

リニアリティが悪化していわゆるダイナミックレンジの
圧縮が起るｅこのよう１に１！象は、ボイスコイルの熱
容量の小さなもの中、変動効率が低く多くの電流を導体
に流さなければならないもの１ｉ顕著に表われるようＫ
する。The linearity deteriorates and so-called dynamic range compression occurs.In this way, 1 in 1! Among the voice coils with small heat capacity, the problem is that they have low fluctuation efficiency and require a large amount of current to flow through the conductor.
do.

従って、ダイスコイルの発熱を出来る丈速かに放熱する
ようにする種々の工夫が従来性われたが、いずれのもの
も根本的なものでなく、ダイナミックレンジの完全な再
現は得ることができなかった。Therefore, various attempts have been made to dissipate the heat generated by the dice coil as quickly as possible, but none of them are fundamental and it is not possible to fully reproduce the dynamic range. Ta.

本考案は上述した点に鑑みてなされ九もので、その目的
とするところは、リニアリティの悪化によるダイナミッ
クレンジの圧縮を根本的に解消し九スピーカ装置を提供
することにある。The present invention has been devised in view of the above-mentioned points, and its purpose is to provide a speaker device that fundamentally eliminates the compression of dynamic range due to deterioration of linearity.

以下本発明を図示実施例について説明する。The present invention will be described below with reference to illustrated embodiments.

第１図は本発明によるスピーカ装置のａ＊ａｉを示し、
図中１，１′は動電蓋スピーカ瓢エツトＫＴｈいて磁気
ＷＡＩｉＢの磁気空隙中に配した導体を二分割〔た導体
部分で、導体がボイス；イルである場合、導体部分１，
１′は第２ｍｖｃ示す工うに、コイルボビン１０に′上
下に重ねて別々に巻設されたボイスフィル部分からそれ
ぞれな）、磁気回路１１の磁気空！ｌＧ中に配設される
・そして、＝イルポビン１０には振動板１２が連結され
る・ ｊ［１図ＫｓＩ−いて、上記導体部分１，１′の一端は
相互１ｇ！絖した上でアースに接続されている。１゜２
′は変調制御素子としてのｎｐｎトランジスタで、これ
らのトランジスタ２．２’０コレクタは相互接続した上
で直流電源３の＋情に接続畜れ、エミッタは上記導体部
分１，１′の他端にそれぞれ接続されている。４は音声
信号源で、その出力はトランジスタ２のペースに直接に
、トランジスタ２′のペースに位相反転回路５を介して
それぞれ接続されている・ 上記トランジスタ２，１′は、図示しないバイアス回路
によってバイアスされていて、それらのペースに音声信
号又はその位相反転された％のが印加されていなくても
、ボイスフィル部分１°、１′。FIG. 1 shows a*ai of a speaker device according to the present invention,
In the figure, 1 and 1' are the conductor parts that are obtained by dividing the conductor placed in the magnetic gap of the electrodynamic lid speaker KTh and the magnetic WAIiB into two parts.
1' indicates the second mvc (as shown in FIG. 1), the voice fill portions are separately wound on the coil bobbin 10 in a vertically stacked manner.), and the magnetic air of the magnetic circuit 11. The diaphragm 12 is connected to the Ilpobin 10. The conductor portions 1 and 1' have one end at 1g! It is wired and connected to ground. 1゜2
' is an npn transistor as a modulation control element, the collectors of these transistors 2,2'0 are interconnected and connected to the + terminal of the DC power supply 3, and the emitters are connected to the other ends of the conductor parts 1, 1'. each connected. Reference numeral 4 denotes an audio signal source, the output of which is connected directly to the pace of transistor 2 and to the pace of transistor 2' via a phase inversion circuit 5.The transistors 2 and 1' are connected by a bias circuit (not shown). The voice fill portions 1°, 1' are biased and even if no audio signal or its phase inverted % is applied to their pace.

定格限定一杯の一定の直流電流ＩＤＯ、Ｉ！１Ｇ’　　
をそれぞれ導体部分１，１′に供給するように導通して
おシ、□それらのペースに音声信号又はその位相反転さ
れたものが印加されると、この信号によって上記直流電
流ＩＮ　、　ＺＤＯ’を変調し、この結果直流電流ｘ塾
ｏ　、　！！１Ｇ’に互に逆位相の音声信号が重畳され
た電流ｘ　、　ｘ’を得てこれらを導体部分１，１′に
それぞれ供給する。Constant DC current IDO, I! 1G'
are supplied to the conductor portions 1 and 1', respectively, and when an audio signal or its phase inverted signal is applied to those paces, this signal causes the above-mentioned DC currents IN and ZDO' to Modulates, resulting in direct current x o,! ! Currents x and x', in which audio signals of mutually opposite phases are superimposed on 1G', are obtained and supplied to the conductor portions 1 and 1', respectively.

上記電流Ｘ、ＸＩは第２１１に矢印で示すように１導体
部分１．１′に互に逆方向にそれぞれ１１１ｉＩれ、導
体部分１．１′に互に逆方向Ｏ駆動力を発生させる。従
うて、Ｉ！１０−　ＩＤＯ’　とすると全体として力が
パクンスし工導体部分１．１′はいずれにも偏位しない
ようになる。今導体部分ＩＫ流される電流Ｉの方向を、
正とすると、電流Ｉ、Ｘ’の関係は第３図に示されるよ
うＫなるため、音声信号をＩＡＯｅｊａ＋ｔとすると、
電流１　＃１Ｚｏｏ　＋　ＩＡＯ＠ｊ帆、電流Ｉ′拡−
’ＬｓＯ＋ＩＡＯ・ｊωｔとな〉、交流的にはＸ　−ｉ
　Ｉ’　−２ＸムＯ・ツ帆　　忙、全電流としてはＩ−
４’−２１カＧ　となる。The currents X and XI are applied to one conductor portion 1.1' in opposite directions 111iI, respectively, as indicated by arrows 211, and generate O driving forces in opposite directions in the conductor portion 1.1'. Follow me, I! 10-IDO', the force as a whole is released and the conductor portion 1.1' is not deviated in any direction. Now, the direction of the current I flowing through the conductor part IK is
If positive, the relationship between currents I and X' becomes K as shown in Figure 3, so if the audio signal is IAOeja+t,
Current 1 #1Zoo + IAO@j sail, current I' expansion -
'LsO+IAO・jωt〉, in terms of alternating current, X −i
I' -2
4'-21 KaG.

従って、導体部分１．１′からなる導体全体として社音
声信号の１倍の振幅に比例した駆動力を発生するが、導
体全体に供給される電流は２　！ｎｏなる一定値となる
ため、全体の発熱量は常に一定に保たれる。Therefore, the entire conductor consisting of the conductor portion 1.1' generates a driving force proportional to 1 times the amplitude of the social audio signal, but the current supplied to the entire conductor is 2! Since the constant value is no, the total amount of heat generated is always kept constant.

今スピーカ装置に加えられる音声信号が第４図に示すよ
う１４のであるとすると、従来Ｏスピーカ装置では、無
信号時ＫＲ，なる抵抗値を有するがイスコイルの抵抗値
は、第Ｓ図に１で示すように変化するようになるが、本
発明のスピーカ装置では、導体の抵抗値１１ｂで示すよ
うに一定に保たれる。Assuming that the audio signal applied to the speaker device is 14 as shown in Fig. 4, the conventional O speaker device has a resistance value of KR when there is no signal, but the resistance value of the coil is 1 as shown in Fig. S. However, in the speaker device of the present invention, the resistance value of the conductor is kept constant as shown by the resistance value 11b.

因に１信号人力時の抵抗値をＲとすると、信号−力装置
では翼が変化するため圧縮率も変化してリニアリティが
悪いのに対し、本発明の装置ではＲが一定であるため圧
縮率は変化せず良好なｙ　＝アリティが得られる。Incidentally, if the resistance value when one signal is manually operated is R, then in the signal-power device, the blade changes, so the compression ratio also changes, resulting in poor linearity, whereas in the device of the present invention, R is constant, so the compression ratio is low. does not change and good y = arity is obtained.

なお、第２図に示す実施例では、ボイスコイル部分１，
１′は同一巻方向に二重に巻回され、単一の磁気空！ｌ
Ｇ中に配されるようになっているが、第１１１に示すぶ
ちに２つＯがイスコイル部分１゜１′は２本導隷を並べ
て同時に巻き、それぞれの巻始めと巻終）を第１図の回
路図のように相互接続し九上でナースに接続するように
したパイ７アイヲ巻きとしても良い。In the embodiment shown in FIG. 2, the voice coil portion 1,
1' is double wound in the same winding direction and has a single magnetic air! l
In the coil part 1°1', two guides are lined up and wound at the same time, and the beginning and end of each winding are placed in the first winding. As shown in the circuit diagram in the figure, it is also possible to have a pie 7 eye roll that is interconnected and connected to the nurse at the ninth point.

第１図の回路図中、・変調制御素子２．２’％位相反転
回路５などからなる電気回路部や、こＯ回路部の電源部
などは、スピーカユニットと共に１第Ｔ図に示すように
スピーカキャビネット２０ＰｉＫ組込むことができる。In the circuit diagram of Fig. 1, the electric circuit section consisting of the modulation control element 2.2'% phase inversion circuit 5, etc., the power supply section of the O circuit section, etc. are as shown in Fig. 1 T together with the speaker unit. Speaker cabinet 20PiK can be incorporated.

なお、ＩＩＩＥＴ図において、２１は電気回路部、２２
は電源部、１３は音声信号入力端子である。この場合、
電気回路部２１を従来の電力増幅回路として働らかせる
ことかできるため、人力端子２３にはンリアンプの出力
を直接印加することができるようになる。ｔた、このよ
うに電気回路部をスピーカキャビネットに＠納すると、
従来のように長いスピーカケーブルで電力増幅器とスピ
ーカユニットとを接続する必要がなくなるため、スピー
カケーブルに起因する性能低下を減少できるようになあ
、更に、電気回路部及びその電源部は従来の電力増幅器
と同騙度又はそれ以下の簡単な装置でよいので、コスト
高となることはない・ 本発明は上述したように、磁気回路の磁気空隙中に配し
た導体を２つの導体部分に分割し、この分割した導体部
分に互に逆方向の等しい駆動力を発生させるように直流
電流を流すと共に、上記直流電流Ｏそ・れぞれに互に逆
位相の音声信号をそれぞれ重畳するようにしたものであ
るため、導体全体として供給畜れる電流は常に一定に保
九れ、その抵抗値が変化すゐごとがなくなる。従って、
従来のように導体の抵抗値が変化してリニアリティが悪
化し、ダイナミックレンジが圧縮するというヒとがな（
な〉、入力音声信号Ｏ変化に応じて変化する駆動電流が
導体に供給され、音声信号−忠実な出力音圧が得られる
ようＫなる。In addition, in the IIIET diagram, 21 is an electric circuit section, 22
1 is a power supply unit, and 13 is an audio signal input terminal. in this case,
Since the electric circuit section 21 can be operated as a conventional power amplifier circuit, the output of the amplifier can be directly applied to the human power terminal 23. Also, when the electric circuit section is placed in the speaker cabinet like this,
It is no longer necessary to connect the power amplifier and the speaker unit with a long speaker cable as in the past, so it is possible to reduce the performance deterioration caused by the speaker cable. A simple device with the same degree of deception or lower is sufficient, so the cost will not be high.As described above, the present invention divides the conductor placed in the magnetic gap of the magnetic circuit into two conductor parts, Direct current is passed through the divided conductor portions so as to generate equal driving forces in opposite directions, and audio signals having mutually opposite phases are superimposed on each of the DC currents O. Therefore, the current that can be supplied to the conductor as a whole is always kept constant, and its resistance value never changes. Therefore,
The disadvantage of conventional methods is that the resistance value of the conductor changes, deteriorating linearity and compressing the dynamic range.
Note that a drive current that changes according to changes in the input audio signal is supplied to the conductor, so that an output sound pressure that is faithful to the audio signal is obtained.

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

第１図は本発明によるスピーカ装置の回路図、露２図は
本発明のスピーカ装置に使用するスピーカケーブルトの
、断面図、第３図は本発ＷＲＯ装置においてスピーカユ
ニットＯ導体に流される電流を示すグラフ、第４図は音
声信号クー例を示す゛グラフ、第５図は第４図の音声信
号を印加したときのスピーカユニットの導体の抵抗値の
様子を示すグラフ、第６図は第２図に示すスピーカユニ
ットの一部分の変形例を示す斜視図、及びｇｙｓｔｔ本
発明の装置を組込んだスピーカキャビネットの断面図で
ある・ １．１′・・・導体部分 ５・・・位相反転回路 １１−・磁気回路 Ｇ・・・磁気２２！隙 轡許出厘人　　パイオニア株式★社 第１図 第２図Fig. 1 is a circuit diagram of a speaker device according to the present invention, Fig. 2 is a sectional view of a speaker cable used in the speaker device of the present invention, and Fig. 3 is a current flowing through the O conductor of the speaker unit in the WRO device of the present invention. 4 is a graph showing an example of an audio signal, FIG. 5 is a graph showing the resistance value of the conductor of the speaker unit when the audio signal in FIG. 4 is applied, and FIG. 2 is a perspective view showing a modification of a part of the speaker unit shown in FIG. 2, and a cross-sectional view of a speaker cabinet incorporating the device of the present invention. 1.1′...Conductor portion 5...Phase inversion circuit 11-・Magnetic circuit G... Magnetism 22! Pioneer Co., Ltd. Figure 1 Figure 2

Claims (1)

【特許請求の範囲】[Claims] 磁気回路の磁気空隙に配した導体に電流を流すことで駆
動力を発生し音を放射する動電型スピーカユニットを有
するスピーカ装置において、前記導体を２つの導体部分
に分割し、該分割した導体部分に互に逆方向の等しい駆
動力を発生させるように直流電流を流すと共に、前記直
流電流のそれように互に逆位相の皆声償号をそれぞれ重
畳するようにしたことを特徴とするスピーカ装置。In a speaker device having an electrodynamic speaker unit that generates driving force and radiates sound by passing a current through a conductor arranged in a magnetic gap of a magnetic circuit, the conductor is divided into two conductor parts, and the divided conductor is divided into two conductor parts. A speaker characterized in that a direct current is caused to flow through the parts so as to generate equal driving forces in mutually opposite directions, and mutually opposite phase compensation signals are superimposed on each other like that of the direct current. Device.