JPS6147040B2 - - Google Patents
Info
- Publication number
- JPS6147040B2 JPS6147040B2 JP52067509A JP6750977A JPS6147040B2 JP S6147040 B2 JPS6147040 B2 JP S6147040B2 JP 52067509 A JP52067509 A JP 52067509A JP 6750977 A JP6750977 A JP 6750977A JP S6147040 B2 JPS6147040 B2 JP S6147040B2
- Authority
- JP
- Japan
- Prior art keywords
- armature
- yoke
- vibration
- legs
- magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000013459 approach Methods 0.000 description 9
- 238000010248 power generation Methods 0.000 description 9
- 230000004907 flux Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Description
【発明の詳細な説明】
本発明は、いわゆるムービングマグネツト形の
ピツクアツプカートリツジの構造に係り、特に厚
み方向に着磁された偏平アーマチユアを用いた構
成として最適なピツクアツプカートリツジに関す
る。
従来より、この種のピツクアツプカートリツジ
（以下、単に「カートリツジ」と称する）として
は第１図及び第２図に示したものが知られてい
る。第１図に示したカートリツジは、一端に音針
１を取着したカンチレバー２の他端に、厚み方向
に着磁された偏平アーマチユア３をカンチレバー
２の軸方向に対して直交延在するようにして取着
し、この偏平アーマチユア３をヨーク４内におい
て支点５を中心として前後方向（矢印Ａ方向）で
傾斜振動可能に支持し、偏平アーマチユア３の傾
斜振動（振動により一方へ傾斜偏倚した状態を仮
想線で示した）に際して、ヨーク４に流れる磁束
の方向を切換え、このヨーク４に巻装された線輪
６に電圧を誘起するようにしたものである。しか
し、この第１図の構成では、偏平アーマチユア３
の振動に際し、ヨーク４に対して偏平アーマチユ
ア３の磁極部がほんの少ししか移動せず、しかも
着磁された厚み方向の寸法に対して、これと対向
するヨーク４の寸法が長いため、図示の様に線輪
６に鎖交する有効磁束φAの他に線輪６に鎖交し
ない無効磁束φBが多く発生してしまい、良好な
感度を得るのが困難である。
これに対し、第２図に示したカートリツジは、
断面がほぼＥ字状のヨーク７を、その中央磁極P1
が、静止時の偏平アーマチユア３の周縁に適宜な
る間隔をもつて対向するように配置し、偏平アー
マチユア３の傾斜振動（振動により一方へ傾斜偏
倚した状態を仮想線で示した）に際してその周縁
がヨーク７の前側磁極P2に近づくか、後側磁極P3
に近づくかによつてヨーク７の線輪６を巻装した
部分に流れる磁束方向を切換え、線輪６に電圧を
誘起するようにしたものである。このようにした
第２図の構成においては、偏平アーマチユア３の
傾斜振動に際して、その周縁の磁極の一方は、中
央磁極P1に対して磁気的バランスをくずして接近
するが、他方の磁極が前側或いは後側磁極P2，P3
に接離する距離の変化量は小さいので発電効率が
高いとはいえなかつた。
また、上記第１図、第２図に示した構成では、
線輪６及びこれを巻装するヨーク４或いは７はそ
れぞれ独立して一方向についての振動を検出する
構成であるので、一般の２チヤンネルステレオ用
とするには、Ｌチヤンネル（左チヤンネル）用、
及びＲチヤンネル（右チヤンネル）用にそれぞれ
同様の構成を一組づつ、つごう２組必要であり、
しかも、磁極面等の構造上、ヨーク４及び７は例
えばパーマロイなどの磁性材料を厚み方向にコ字
状に折曲しなければならず、磁気特性の劣化を招
くおそれがある。従つて、これら従来の構成は、
ヨークの製作、またこれを組立てる上での容易
性、製造上及び特性上のバラつきなどの点で好ま
しいとはいえなかつた。
本発明は、この様な事情に基いて、なされたも
ので、発電効率が高く、電気磁気特性に優れてし
かも構成が簡単で且つ容易に製造できるカートリ
ツジを提供することを目的としている。
以下、第３図以降を参照しながら、実施例を用
いて本発明について詳細に説明する。
第３図は本発明の一実施例を示す斜視図、第４
図はその正面図である。図において、一端に音針
１を取着したカンチレバー２の他端に、厚み方向
に着磁された円形板状の偏平アーマチユア３を前
方にＮ極としカンチレバー２の軸方向に対して直
交延在するようにして取着し、この偏平アーマチ
ユア３をその中心軸上の厚み方向での中央を支点
として傾斜振動し得るようにして適宜なるダンパ
ー（図示せず）を介して支持し、予定の一位置に
付勢静止させるべく構成している。更に、この付
勢静止位置にある偏平アーマチユア３の延在平面
と同一或いは平行な行面上に偏平アーマチユア３
より薄い３本の脚部８−１，８−２，８−３を有
するヨーク８を偏平アーマチユア３の上方に位置
する如く配設し、このヨーク８の両側脚部８−１
及び８−２の先端磁極面がそれぞれ偏平アーマチ
ユア３の周縁の左右両側方の側面部に適宜間隔を
存して対向するようになし、中央脚部８−３の先
端磁極面が上側方の側面部に適宜間隔を存して対
向するようになし、これら各脚部８−１，８−
２，８−３には両側脚部８−１及び８−２にそれ
ぞれ線輪L1及びR1を巻装し且つ中央脚部８−３
を２本の磁路８−４，８−５に分け一方の磁路８
−４に線輪L2他方の磁路８−５に線輪R2を巻装
する。前記線輪L1とL2及びR1とR2はそれぞれ後
述の如く音針１の振動に基くアーマチユア３の所
定の傾斜振動に対応する誘起信号以外の誘起信号
は相殺し且つ所定の傾斜振動に対応する誘導信号
は加算するように結線し、各々音針１の振動に応
じたＬチヤンネル及びＲチヤンネルの信号をとり
出すＬ側線輪Ｌ及びＲ側線輪Ｒとなす。
次に上記構成における発電原理について詳細に
説明する。すなわち、第４図の状態から、第５図
に示すように音針１が変位し偏平アーマチユア３
が図示Ｘ−X′線を軸に、基準面（レコード盤
面）に対する垂直方向に対して45゜の角度をなす
Y′方向に傾斜偏倚したとすれば、ヨーク８の左
側脚部８−１の先端磁極面に偏平アーマチユア３
のＮ極が接近し、中央脚部８−３と右側脚部８−
２のそれぞれの先端磁極面にはＳ極が接近するの
で、ヨーク８には第５図に示すように磁束φ０，
φ１，φ２，φ３が生ずる。（但し、φ０≒φ１
＋φ２＋φ３）従つて、左側脚部８−１に巻装し
た線輪L1、中央脚部８−３の一方の磁路８−４
に巻装した線輪L2にはそれぞれ図示極性の電圧
が誘起され、これら線輪L1，L2を図示の如く前
記誘起電圧が加算されるように結線してＬ側線輪
Ｌとしておけば、偏平アーマチユア３の前記Ｘ−
X′線を軸とした傾斜振動による磁束の変化に比
例した電圧がＬ側線輪Ｌからとり出せる。一方、
ヨーク８の右側脚部８−２に巻装した線輪R1と
中央脚部８−３の他方の磁路８−５に巻装した線
輪R2にはそれぞれ図示極性の電圧が誘起される
が、これら線輪R1，R2を図示の如く前記誘起電
圧が相殺されるように結線してＲ側線輪Ｒとして
おくことにより、偏平アーマユア３の前記Ｘ−
X′線を軸とした傾斜振動によつてはＲ側線輪Ｒ
には電圧は誘起されない。この場合、線輪R1と
R2の巻数比の関係はそれぞれの巻数をNR1及び
NR2とすれば、線輪R1に誘起される電圧が線輪R2
に誘起される電圧と等しくなるように
NR1ｄφ３／ｄｔ＝NR2ｄφ２／ｄｔ
なる関係を満足する如く設定することはいうまで
もない。
また、上記とは反対に偏平アーマチユア３が第
４図の状態から第６図のようにＹ−Y′線を軸に
基準面に対する垂直方向に対して45゜の角度をな
すX′方向に傾斜偏倚したとすれば、偏平アーマ
チユア３のＮ極はヨーク８の右側脚部８−２の先
端磁極面に接近しＳ極は左側脚部８−１と中央脚
部８−３の先端磁極面に接近して、図示した方向
に磁束φ0′，φ1′，φ2′，φ3′が生じ、この場合上
述の様に線輪R1とR2及びL1とL2が結線されてい
ると、線輪R1，R2に誘起された電圧は加算さ
れ、線輪L1，L2に誘起された電圧は相殺され
て、結果的にはＲ側線輪Ｒには偏平アーマチユア
３のＹ−Y′線を軸とした傾斜振動による磁束の
変化に比例した電圧が誘起され、このようなＹ−
Y′線を軸とした傾斜振動ではＬ側線輪Ｌには電
圧は誘起されない。この場合線輪L1とL2の巻数
比も上述の線輪R1とR2の巻数比と同様に設定さ
れている事は勿論である。
このような発電原理による上記構成のカードリ
ツジは性能面においても、また製作面においても
種々の利点を有する。すなわち、上述においては
偏平アーマチユア３の周縁に延在するヨーク８の
３本の脚部８−１，８−２，８−３の厚さt1は第
７図に示す側面図のように厚み方向に着磁されて
いる偏平アーマチユア３の厚さt2より薄く設定し
ているため、従来の構造（例えば第１図）に比し
て無効磁束の発生が少なく、また偏平アーマチユ
ア３のわずかな変位に対してもヨーク８脚部間に
磁位差が発生するため発電効率が高い。しかも、
この場合、構造上、偏平アーマチユア３とヨーク
８の脚部８−１，８−２，８−３との間隔を容易
に狭く設定できるので、更に発電効率を向上でき
る。また、発電効率がよいため偏平アーマチユア
３の厚さを薄くしたり、外形を小さくしたりでき
るので、振動系を軽量化でき、周波数特性および
機械インピーダンス特性を向上できる。また、偏
平アーマチユア３の下方（レコード盤面側）にヨ
ークを配設しない構成であるので、第７図の如く
発電部下側とレコード盤面との間隔αを広くとる
事ができ、このため垂直トラツキング角βの設計
が容易であり、またカンチレバー２の長さを短か
くして振動系の軽量化を図ることも容易に行なえ
る。更に、ヨーク８の中央脚部８−３の磁路８−
４，８−５に巻装した線輪L2，R2の巻数を適宜
設定することにより、Ｌ、Ｒチヤンネル間のクロ
ストークの値をよくすることが出来、且つ一定の
範囲内で任意に選定することも出来る。ヨーク８
における磁路を短かく設定でき、ヨークの曲げ加
工も不要となるため、磁気損失が少ない。特に、
上記構成では曲げ加工が不要であるためヨーク部
のラミネーシヨン即ち成層構造化が容易に行な
え、磁気回路の周波数特性の向上を容易に図り得
る。また、偏平アーマチユア３の下方にヨーク８
が存在していないため、振動系の着脱に際しても
従来のように正面から着脱する以外に下方からの
着脱が可能となり、振動系の着脱、いわゆる針交
換を簡単化できる。また、ヨーク８の脚部８−
１，８−２及び８−３の磁路８−４，８−５の線
輪L1，R1，L2，R2を巻装する部分の間隔を広く
できるので巻線作業の簡単化が図れる。また、従
来、２チヤンネルステレオ用カートリツジではＬ
チヤンネル用及びＲチヤンネル用にそれぞれ独立
して１組づつ、計２組のヨークが必要であつた
が、上記構成によればヨーク８は一組でよく、ヨ
ーク８の製作上及びカートリツジの組立製作上有
利であり、製作費の低減化が図れる。その他、小
型、軽量、構造が簡単であること等により生ずる
種々の効果がある。
尚、上記実施例においては、アーマチユア３の
厚さ（磁化方向寸法）よりも薄い３本の脚部８−
１，８−２，８−３を有するヨーク８をアーマチ
ユア３の磁化方向に対して直角な方向に配設して
あるが、これはアーマチユア３の周縁に３本の脚
部の先端が対向し、３本の脚部間が２本の磁路８
−４，８−５を介して磁気的に連結してさえいれ
ば、例えば第８図に示すような形状のヨーク９と
してもよく、第９図に示すような形状のヨーク１
０等としても良い。また、同実施例においては円
形板状の偏平アーマチユア３を用いる構成とした
が、第１０図に示すように棒状アーマチユア１１
を用い且つこのアーマチユア１１に対してアーマ
チユア１１の長さ方向に平行な磁極面で三本の脚
部１２−１，１２−２，１２−３を対向させたヨ
ーク１２を設ける構成としてもよい。この場合
は、脚部１２−１，１２−２，１２−３の対向磁
極面はアーマチユア１１より長い方が好ましい。
このほか、本発明はその要旨を変更しない範囲
内で種々変形して実施できるものである。
たとえば、本発明のアーマチユアの形状も円形
に限らず、第１１図ａのように正方形、同図ｂの
ように略半円形、同図ｃのように略三角形、同図
ｃのように略凸字状などでもよいことは勿論であ
る。
以上詳述したように本発明によれば、発電効率
が高く、電気磁気特性に優れてしかも構成が簡単
で且つ容易に製造できるカートリツジを提供する
事ができる。 DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a so-called moving magnet type pick-up cartridge, and particularly to a pick-up cartridge optimally constructed using a flat armature magnetized in the thickness direction. Conventionally, as this type of pick-up cartridge (hereinafter simply referred to as "cartridge"), those shown in FIGS. 1 and 2 have been known. The cartridge shown in FIG. 1 has a cantilever 2 with a tone needle 1 attached to one end and a flat armature 3 magnetized in the thickness direction extending perpendicularly to the axial direction of the cantilever 2 at the other end. This flat armature 3 is supported in the yoke 4 so as to be able to tilt and vibrate in the front-rear direction (in the direction of arrow A) about the fulcrum 5. (shown by imaginary lines), the direction of the magnetic flux flowing through the yoke 4 is switched, and a voltage is induced in the coil 6 wound around the yoke 4 . However, in the configuration shown in Fig. 1, the flat armature 3
During the vibration of In addition to the effective magnetic flux φ A that interlinks with the wire 6, a large amount of invalid magnetic flux φ B that does not interlink with the wire 6 is generated, making it difficult to obtain good sensitivity. On the other hand, the cartridge shown in Figure 2
The yoke 7 , which has an approximately E-shaped cross section, is connected to its central magnetic pole P1 .
are arranged so as to face the peripheral edge of the flat armature 3 at an appropriate distance when the flat armature 3 is at rest, and when the flat armature 3 is subjected to tilting vibration (the state in which the flat armature 3 is tilted to one side due to vibration is shown by a phantom line), the peripheral edge is Approach the front magnetic pole P 2 of the yoke 7 , or approach the rear magnetic pole P 3
The direction of the magnetic flux flowing through the portion of the yoke 7 around which the wire ring 6 is wound is switched depending on the approach to the wire ring 6, thereby inducing a voltage in the wire ring 6. In the configuration shown in FIG. 2, when the flat armature 3 tilts, one of the magnetic poles on its periphery approaches the central magnetic pole P1 while losing its magnetic balance, while the other magnetic pole approaches the central magnetic pole P1. Or rear magnetic pole P 2 , P 3
Since the amount of change in the distance between contact and separation was small, it could not be said that the power generation efficiency was high. Furthermore, in the configuration shown in FIGS. 1 and 2 above,
The wire ring 6 and the yoke 4 or 7 around which it is wound are each configured to independently detect vibrations in one direction, so for general two-channel stereo use, one for the L channel (left channel), one for the L channel (left channel),
Two sets of the same configuration are required for the and R channel (right channel), respectively.
Furthermore, due to the structure of the magnetic pole surfaces, etc., the yokes 4 and 7 must be made of a magnetic material such as permalloy and bent into a U-shape in the thickness direction, which may lead to deterioration of magnetic properties. Therefore, these conventional configurations are
This could not be said to be preferable in terms of ease of manufacturing the yoke, ease of assembling the yoke, and variations in manufacturing and characteristics. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cartridge that has high power generation efficiency, excellent electromagnetic characteristics, has a simple structure, and can be easily manufactured. Hereinafter, the present invention will be described in detail using examples with reference to FIG. 3 and subsequent figures. FIG. 3 is a perspective view showing one embodiment of the present invention, and FIG.
The figure is its front view. In the figure, a circular plate-shaped flat armature 3 magnetized in the thickness direction is attached to the other end of a cantilever 2 with a tone needle 1 attached to one end, with the north pole facing forward and extending orthogonally to the axial direction of the cantilever 2. This flat armature 3 is supported via a suitable damper (not shown) so that it can vibrate tiltedly with the center in the thickness direction on its central axis as a fulcrum, and the It is configured to be biased and stationary in position. Furthermore, the flat armature 3 is placed on a horizontal plane that is the same as or parallel to the extending plane of the flat armature 3 in this biased stationary position.
A yoke 8 having three thinner legs 8-1, 8-2, and 8-3 is disposed above the flat armature 3, and both side legs 8-1 of this yoke 8 are disposed above the flat armature 3.
The tip magnetic pole surfaces of the central leg portions 8-2 and 8-2 are arranged to face the left and right side surfaces of the peripheral edge of the flat armature 3 with an appropriate distance therebetween, and the tip magnetic pole surfaces of the central leg portion 8-3 face the upper side surfaces. The legs 8-1, 8- face each other with an appropriate distance between them.
2 and 8-3, wire rings L 1 and R 1 are wound around both side legs 8-1 and 8-2, respectively, and the center leg 8-3
divided into two magnetic paths 8-4 and 8-5, one magnetic path 8
Wrap the wire ring L2 around -4 and the wire ring R2 around the other magnetic path 8-5. As will be described later, the wire rings L 1 and L 2 and R 1 and R 2 cancel induced signals other than the induced signals corresponding to a predetermined tilt vibration of the armature 3 based on the vibration of the tone needle 1, and generate a predetermined tilt vibration. The guidance signals corresponding to the above are connected in such a way that they are added, and are formed into an L-side train ring L and an R-side train ring R, which take out L channel and R channel signals corresponding to the vibrations of the tone needle 1 , respectively. Next, the principle of power generation in the above configuration will be explained in detail. That is, from the state shown in FIG. 4, the tone needle 1 is displaced as shown in FIG. 5, and the flat armature 3
makes an angle of 45° with respect to the direction perpendicular to the reference plane (record surface), with the axis shown on the line X-X'
If it is tilted in the Y' direction, the flat armature 3 is placed on the tip magnetic pole surface of the left leg 8-1 of the yoke 8.
The N poles of the center leg 8-3 and the right leg 8-
Since the S pole approaches the tip magnetic pole surface of each of the yoke 8, the magnetic flux φ 0 ,
φ 1 , φ 2 and φ 3 are generated. (However, φ 0 ≒ φ 1
+φ 2 +φ 3 ) Therefore, the coil L 1 wound around the left leg 8-1 and one magnetic path 8-4 of the center leg 8-3
A voltage of the polarity shown is induced in each of the coils L 2 wound on the coil L 2 , and these coils L 1 and L 2 are connected as shown in the figure so that the induced voltages are added to form the L side coil.
If set as L , the above-mentioned X- of the flat armature 3
A voltage proportional to the change in magnetic flux due to the gradient vibration centered on the X' line can be taken out from the L side track L. on the other hand,
Voltages of the polarities shown are induced in the wire ring R 1 wound around the right leg 8-2 of the yoke 8 and the wire R 2 wound around the other magnetic path 8-5 of the center leg 8-3. However, by connecting these wire rings R 1 and R 2 as shown in the figure so that the induced voltages are canceled out to form the R side wire ring R , the X-
Due to the tilt vibration centered on the X' line, the R side track R
No voltage is induced in In this case, the wire ring R 1 and
The relationship between the turns ratio of R 2 is the number of turns of NR 1 and
If NR 2 , the voltage induced in the coil R 1 is the voltage induced in the coil R 2
Needless to say, the voltage is set to satisfy the relationship NR 1 dφ 3 /dt=NR 2 dφ 2 /dt so as to be equal to the voltage induced in . Contrary to the above, the flat armature 3 is tilted from the state shown in Fig. 4 in the X' direction, which is at an angle of 45° with respect to the perpendicular direction to the reference plane, with the Y-Y' line as the axis, as shown in Fig. 6. If it is deflected, the N pole of the flat armature 3 approaches the tip magnetic pole surface of the right leg 8-2 of the yoke 8 , and the S pole approaches the tip magnetic pole surfaces of the left leg 8-1 and the center leg 8-3. As they approach, magnetic fluxes φ 0 ′, φ 1 ′, φ 2 ′, φ 3 ′ are generated in the directions shown, and in this case, the wire rings R 1 and R 2 and L 1 and L 2 are connected as described above. , the voltages induced in the coils R 1 and R 2 are added, and the voltages induced in the coils L 1 and L 2 are canceled out, and as a result, the R side coil R has the voltage of the flat armature 3 A voltage proportional to the change in magnetic flux due to the gradient vibration centered on the Y-Y' line is induced, and such Y-
No voltage is induced in the L side track wheel L in the tilt vibration centered on the Y' line. In this case, it goes without saying that the turns ratio between the wires L 1 and L 2 is set similarly to the above-described turns ratio between the wires R 1 and R 2 . The card cartridge having the above structure based on such a power generation principle has various advantages in terms of performance and manufacturing. That is, in the above description, the thickness t1 of the three legs 8-1, 8-2, and 8-3 of the yoke 8 extending around the periphery of the flat armature 3 is the same as the side view shown in FIG. Because it is set thinner than the thickness t 2 of the flat armature 3, which is magnetized in the Even in response to displacement, a magnetic potential difference occurs between the eight yoke legs, resulting in high power generation efficiency. Moreover,
In this case, due to the structure, the flat armature 3 and the yoke
Since the distance between the leg portions 8-1, 8-2, and 8-3 of 8 can be easily set narrow, power generation efficiency can be further improved. Furthermore, since the power generation efficiency is high, the thickness of the flat armature 3 can be made thinner and the outer shape can be made smaller, so that the weight of the vibration system can be reduced and the frequency characteristics and mechanical impedance characteristics can be improved. In addition, since the configuration does not include a yoke below the flat armature 3 (on the record surface side), the distance α between the lower side of the power generator and the record surface can be widened as shown in FIG. It is easy to design β, and it is also easy to reduce the weight of the vibration system by shortening the length of the cantilever 2. Furthermore, the magnetic path 8- of the central leg portion 8-3 of the yoke 8
By appropriately setting the number of turns of the coils L 2 and R 2 wound around 4 and 8-5, it is possible to improve the crosstalk value between the L and R channels, and also to adjust the crosstalk value arbitrarily within a certain range. You can also select. York 8
Since the magnetic path can be set short and bending of the yoke is not required, magnetic loss is small. especially,
Since the above structure does not require bending, the yoke portion can be easily laminated, that is, formed into a layered structure, and the frequency characteristics of the magnetic circuit can be easily improved. In addition, a yoke 8 is placed below the flat armature 3.
Since there is no such thing, when attaching and detaching the vibration system, it is possible to attach and detach from the bottom instead of from the front as in the conventional case, which simplifies attachment and detachment of the vibration system, so-called needle exchange. In addition, the leg portion 8- of the yoke 8
1, 8-2 and 8-3's magnetic paths 8-4, 8-5, where the wire rings L 1 , R 1 , L 2 , and R 2 are wound can be widened, which simplifies the winding work. can be achieved. In addition, conventionally, 2-channel stereo cartridges were
A total of two sets of yokes were required, one set each for the channel and the R channel, but according to the above configuration, only one set of yokes 8 is required, and the manufacturing of the yoke 8 is simple. This is advantageous in assembling and manufacturing the top and cartridge, and can reduce manufacturing costs. In addition, there are various effects resulting from being small, lightweight, and having a simple structure. In the above embodiment, three legs 8-- which are thinner than the thickness (magnetization direction dimension) of the armature 3--
A yoke 8 having numbers 1, 8-2, and 8-3 is arranged in a direction perpendicular to the magnetization direction of the armature 3. , two magnetic paths 8 between the three legs
-4, 8-5, the yoke 9 may have a shape as shown in FIG. 8, for example, or the yoke 1 may have a shape as shown in FIG.
It may be set to 0 etc. In addition, in the same embodiment, the circular plate-shaped flat armature 3 was used, but as shown in FIG.
In addition, a yoke 12 may be provided in which three leg portions 12-1, 12-2, and 12-3 are opposed to the armature 11 with magnetic pole surfaces parallel to the length direction of the armature 11. In this case, it is preferable that the opposing magnetic pole surfaces of the leg portions 12-1, 12-2, and 12-3 be longer than the armature 11. In addition, the present invention can be implemented with various modifications without changing the gist thereof. For example, the shape of the armature of the present invention is not limited to a circular shape, but is also square as shown in FIG. 11a, approximately semicircular as shown in FIG. 11b, approximately triangular as shown in FIG. Of course, it may also be in the shape of a letter. As described in detail above, according to the present invention, it is possible to provide a cartridge that has high power generation efficiency, excellent electromagnetic characteristics, has a simple structure, and can be easily manufactured.
第１図は従来のピツクアツプカートリツジの一
例の概略的構成図、第２図は従来のピツクアツプ
カートリツジの他の例の概略構成図、第３図は本
発明の一実施例の概略構成を示す斜視図、第４図
は同実施例の正面図、第５図及び第６図は同実施
例の発電原理を説明するための図、第７図は同実
施例の側面を示す概略構成図、第８図〜第１０図
はそれぞれ本発明の異なる実施例の概略構成を示
す斜視図、第１１図は本発明のアーマチユアの変
形例を示す図である。
１……音針、２……カンチレバー、３，１１…
…アーマチユア、８，９，１０，１２……ヨー
ク、８−１，８−２，８−３，１２−１，１２−
２，１２−３……脚部、８−４，８−５，１２−
４，１２−５……磁路、Ｌ……Ｌ側線輪、Ｒ……
Ｒ側線輪、L1，L2，R1，R2……線輪。
Fig. 1 is a schematic diagram of an example of a conventional pick-up cartridge; Fig. 2 is a schematic diagram of another example of a conventional pick-up cartridge; and Fig. 3 is a schematic diagram of an embodiment of the present invention. A perspective view, FIG. 4 is a front view of the embodiment, FIGS. 5 and 6 are diagrams for explaining the power generation principle of the embodiment, and FIG. 7 is a schematic configuration diagram showing a side view of the embodiment. FIGS. 8 to 10 are perspective views showing schematic configurations of different embodiments of the present invention, and FIG. 11 is a diagram showing a modification of the armature of the present invention. 1...Sound needle, 2...Cantilever, 3,11...
... Armature, 8 , 9 , 10 , 12... Yoke, 8-1, 8-2, 8-3, 12-1, 12-
2, 12-3... Leg, 8-4, 8-5, 12-
4,12-5...Magnetic path, L ...L side track, R ...
R side track wheel, L 1 , L 2 , R 1 , R 2 ... Line wheel.
Claims (1)
に、他端にこのカンチレバーの軸方向に着磁され
たアーマチユアを取着し、このアーマチユアを傾
斜振動可能に且つ一位置に付勢静止させるべく支
持し、この付勢静止位置にあるアーマチユアの周
囲側面に３方からそれぞれ対向する３本の脚部を
有し、この３本の脚部の中央脚部を途中から２本
の磁路に分け、この中央脚部と両側脚部とを連結
したヨークを設け、上記中央脚部の２本の磁路お
よび両側脚部にそれぞれ線輪を巻装し、これらの
線輪を上記音針に与えられる振動による上記アー
マチユアの所定の傾斜振動に対応する誘起信号以
外の誘起信号は相殺し、且つ上記所定の傾斜振動
に対応する誘起信号は加算される様に結線して、
上記音針に与えられる振動によつて上記アーマチ
ユアの傾斜振動に応じた信号を得ることを特徴と
するピツクアツプカートリツジ。1 A tone needle is attached to one end of the cantilever, and an armature magnetized in the axial direction of this cantilever is attached to the other end, and this armature is supported so as to be able to tilt and vibrate and to be biased and stationary at one position. , has three legs facing each other from three sides on the peripheral side of the armature in the biased rest position, and the central leg of these three legs is divided into two magnetic paths midway, and this A yoke connecting the center leg and both side legs is provided, wire rings are wound around the two magnetic paths of the center leg and both side legs, and these wire rings are used to generate vibrations imparted to the tone needle. The wires are connected so that the induced signals other than the induced signals corresponding to the predetermined tilt vibration of the armature are canceled out, and the induced signals corresponding to the predetermined tilt vibration are added,
A pick-up cartridge characterized in that a signal corresponding to the tilting vibration of the armature is obtained by vibration applied to the tone needle.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6750977A JPS542101A (en) | 1977-06-07 | 1977-06-07 | Pickup cartridge |
| GB31529/77A GB1582169A (en) | 1976-07-31 | 1977-07-27 | Pickup cartridge |
| US05/819,282 US4177360A (en) | 1976-07-31 | 1977-07-27 | Moving magnet type pickup cartridge |
| DE2734331A DE2734331C2 (en) | 1976-07-31 | 1977-07-29 | Pickups |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6750977A JPS542101A (en) | 1977-06-07 | 1977-06-07 | Pickup cartridge |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11871786A Division JPS6276396A (en) | 1986-05-23 | 1986-05-23 | Pickup cartridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS542101A JPS542101A (en) | 1979-01-09 |
| JPS6147040B2 true JPS6147040B2 (en) | 1986-10-17 |
Family
ID=13347012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6750977A Granted JPS542101A (en) | 1976-07-31 | 1977-06-07 | Pickup cartridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS542101A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9659580B2 (en) | 2015-04-21 | 2017-05-23 | Kabushiki Kaisha Audio-Technica | Moving-magnet type pickup cartridge |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60192949A (en) * | 1984-03-14 | 1985-10-01 | Toray Ind Inc | Manufacture of photosensitive drum |
| US5039598A (en) * | 1989-12-29 | 1991-08-13 | Xerox Corporation | Ionographic imaging system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4944886A (en) * | 1972-09-05 | 1974-04-27 | ||
| JPS515288U (en) * | 1974-06-27 | 1976-01-14 |
-
1977
- 1977-06-07 JP JP6750977A patent/JPS542101A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4944886A (en) * | 1972-09-05 | 1974-04-27 | ||
| JPS515288U (en) * | 1974-06-27 | 1976-01-14 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9659580B2 (en) | 2015-04-21 | 2017-05-23 | Kabushiki Kaisha Audio-Technica | Moving-magnet type pickup cartridge |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS542101A (en) | 1979-01-09 |
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