JPS6028439B2 - pickup cartridge yoke - Google Patents

Description

【発明の詳細な説明】 本発明はピックアップカートリッジのヨークに係るもの
で、本発明の形状のヨークを用いることにより磁気効率
が良く、且つ針先角度を理想角度に近づけることのでき
るヨークを得るにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yoke for a pickup cartridge, and by using the yoke having the shape of the present invention, it is possible to obtain a yoke that has good magnetic efficiency and can bring the needle point angle close to the ideal angle. be.

第１図は従来用いられている可動磁石型ピックアップ力
−トリッジに発電形態を示す側断面図で、ポールピース
１及び２は樹脂材等からなる基台３に成形保持され、更
に後端にはヨーク４が積層されて両ポールピースを磁気
短絡し、更に巻線５が設けられていた。ポールピース１
，２の平行対向する空隙はカンチレバ７、永久磁石８等
からなる振動子９が挿入されて発電形態を形成する。FIG. 1 is a side sectional view showing a conventionally used movable magnet type pickup force-tridge power generation mode, in which pole pieces 1 and 2 are molded and held on a base 3 made of a resin material, etc., and the rear end is A yoke 4 was laminated to magnetically short-circuit both pole pieces, and a winding 5 was further provided. pole piece 1
, 2 which face each other in parallel, a vibrator 9 consisting of a cantilever 7, a permanent magnet 8, etc. is inserted to form a power generation form.

しかしてこのような従来形にあっては、線論５の鉄ひま
ポールピースとヨークに分割され、線論ボビン挿入後ポ
ールピース材とヨーク材を糟層して１個の鉄心としてい
たため、永久磁石８の微弱な磁気はこの積層部がなす空
隙で損失し、充分な出力を得ることができず、またポー
ルピース、ヨーク共別の材料から製造されるもので特性
のばらつき、磁気歪等の原因ともなっていた。However, in such a conventional type, the iron core of wire theory 5 was divided into a pole piece and a yoke, and after inserting the wire theory bobbin, the pole piece material and yoke material were layered to form one iron core. The weak magnetism of the permanent magnet 8 is lost in the gaps formed by the laminated parts, making it impossible to obtain sufficient output, and since the pole piece and yoke are manufactured from different materials, variations in characteristics, magnetostriction, etc. It was also the cause of

本発明はこのような従来型の欠点を改善するものである
。The present invention improves these drawbacks of the conventional type.

第４図は本発明によるヨーク１１の形状を示す側面図で
、パ−マロィ等の高導磁性からなる１枚のヨーク材はそ
の両端が互いに逆方向を向くようにして略のの字形状に
曲げたもので、そのとき先端部分を平行に対向させて鞠
心Ｏが通る空隙１０を形成させる。FIG. 4 is a side view showing the shape of the yoke 11 according to the present invention, in which a single sheet of yoke material made of highly magnetically conductive material such as permalloy is formed into a substantially dogleg shape with both ends facing in opposite directions. When bent, the tip portions are placed parallel to each other to form a gap 10 through which the center O passes.

また上方に半円形状にふくらんだ部分１４には線輪１２
が巻線される。このような形状のヨーク１１は第５図の
正面図に示す如く、互いの軸心Ｏを重ねて直角に交叉さ
せるならば、夫々のヨーク１１の平行に対向した先端部
分が形成する空隙１川ま角筒を形成する。In addition, a wire ring 12 is provided in the upper semicircular bulged portion 14.
is wound. As shown in the front view of FIG. 5, the yokes 11 having such a shape are arranged so that their axes O overlap each other and intersect at right angles. It forms a square tube.

この角筒は振動子を保持する振動子保持部６を形成する
ものである。この振動子保持部６の周辺は樹脂等で成型
固定されて基台１３を形成する。This rectangular tube forms a vibrator holding section 6 that holds the vibrator. The periphery of the vibrator holding portion 6 is molded and fixed with resin or the like to form a base 13.

第２図はかかる本発明のヨーク１１を実施したピックア
ップカートリッジの発電形態を示す側断面図、及び第３
図はその正面図で、２個のヨーク１１の空隙１０で角筒
状に形成された振動子保持部６には従来型と同様の振動
子９が挿入されて発霜形態を形成するものである。FIG. 2 is a side sectional view showing a power generation form of a pickup cartridge that implements the yoke 11 of the present invention, and a third
The figure is a front view of the structure, in which a vibrator 9 similar to the conventional type is inserted into the vibrator holding part 6, which is formed into a rectangular tube shape by the gap 10 between two yokes 11, to form a frosting form. be.

しかして本発明のヨーク１１は１枚のヨーク材を略のの
字形に曲げ、その先端部分を平行に対向させて従来型の
ポールピース部と巻線されるヨーク部を‐一体としたも
ので、そのため接ぎ足しヨーク材の空隙による磁気損失
、異質材による磁気歪等が生じることがなくなる。Therefore, the yoke 11 of the present invention is made by bending a piece of yoke material into a substantially square shape, and making the ends of the yoke material face each other parallel to each other, so that the conventional pole piece part and the yoke part on which the wire is wound are integrated. Therefore, magnetic loss due to gaps in the spliced yoke material, magnetostriction due to dissimilar materials, etc. will not occur.

更にのの字形状に曲げることにより藤心０は巻線部１４
から大き〈偏心させて片側に寄せることができるので、
振動子保持部６をレコード面により近接させることが可
能となり、カートリッジケースに組込んだ際カンチレバ
先端の針先の角度を録音角度、例えば１５度に合せるま
たは近付けることが可能となり、特性の向上を期するこ
とができる。By further bending it into a cross-shaped shape, Fujishin 0 becomes the winding part 14.
Since it can be eccentrically moved to one side,
It becomes possible to bring the vibrator holding part 6 closer to the record surface, and when it is assembled into the cartridge case, it becomes possible to match or bring the angle of the stylus tip at the tip of the cantilever to the recording angle, for example 15 degrees, which improves the characteristics. You can wait.

また軸心Ｏの偏心とのの字形状により巻線部１４が従来
型に比して大きくなるので巻線が容易になる等の数々の
利点を有するものである。Further, due to the eccentricity of the axis O and the cross-shaped shape, the winding portion 14 is larger than that of the conventional type, so it has many advantages such as easier winding.

尚ヨーク１１は１枚板の１枚重ねとして説明したが、こ
れは１枚板を複数枚積層してのの字形状に形成させるこ
とは何等支障はない。Although the yoke 11 has been described as a single plate stacked one on top of the other, there is no problem in forming the yoke 11 into a cross-shaped shape by stacking a plurality of single plates.

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

第１図は従釆型ピックアップカートリッジの発電形態を
示す側断面図、第２図は本発明による同じく発電形態を
示す側断面図、第３図は同じく正面図、第４図は本発明
によるヨークの形状を示す側面図、第５図は同じくヨー
クを粗合せた正面図である。 １，２…ポールピース、３…基台、４…ヨーク、５・・
・線論、６・・・振動子保持部、７・・・カンチレバ、
８…永久磁石、９・・・振動子、１０・・・空隙、１１
・・・ヨーク、１２・・・線輪、１３・・・基台、０・
・・振動子軸心。 、丁図 が２図 ゲラ優 Ｉ７４ー霧 」タ 下幻FIG. 1 is a side sectional view showing a power generation form of a slave type pickup cartridge, FIG. 2 is a side sectional view showing the same power generation form according to the present invention, FIG. 3 is a front view, and FIG. 4 is a yoke according to the present invention. FIG. 5 is a side view showing the shape of the yoke, and FIG. 5 is a front view showing the yoke roughly assembled. 1, 2...Pole piece, 3...Base, 4...Yoke, 5...
・Line theory, 6... Vibrator holding part, 7... Cantilever,
8... Permanent magnet, 9... Vibrator, 10... Air gap, 11
... Yoke, 12 ... Line wheel, 13 ... Base, 0.
... Vibrator axis. , 2 drawings galley Yu I74 - mist'ta lower illusion

Claims (1)

【特許請求の範囲】[Claims] １ １枚の板または１枚の板を複数枚積層した高導磁性
材からなるヨーク材を、その両端が互いに逆方向側にあ
るようにして先端部分を平行に対向させて略のの字形に
曲げてヨークを形成し、該平行に対向する空隙をカンチ
レバ、永久磁石等からなる振動子が挿入される振動子保
持部となし、かくて該振動子保持部の軸心は該のの字形
状のヨークの一端側に偏心し、該ヨークの該振動子保持
部軸心から離れて略半円形の形状を示す巻線部分を形成
させ、かかる形状の該ヨーク２個を夫々の該軸心を重ね
て直角に交叉させ、且つ該振動子保持部周囲を樹脂等で
成型固定して基台となし、該基台から露出した該ヨーク
材の該巻線部分の夫々に発電用線輪を巻線したことを特
徴とするピツクアツプカートリツジのヨーク。1. A yoke material made of one plate or a highly magnetically conductive material made of a plurality of laminated one plates is made into an approximately square shape with both ends facing in opposite directions and the tip portions facing each other in parallel. It is bent to form a yoke, and the parallel opposing air gap is used as a vibrator holding part into which a vibrator made of a cantilever, a permanent magnet, etc. is inserted, and the axis of the vibrator holding part is shaped like a square. A winding portion having a substantially semicircular shape is formed eccentrically on one end side of the yoke and away from the axis of the vibrator holding part of the yoke, and the two yokes having such a shape are arranged so that the two yokes are arranged so that the two yokes have a substantially semicircular shape. They are stacked and crossed at right angles, and the periphery of the vibrator holding part is molded and fixed with resin or the like to form a base, and a power generation coil is wound around each of the winding portions of the yoke material exposed from the base. The yoke of the pick-up cart cartridge is characterized by a straight line.