JPS61178717A - Rotary magnetic head assembly - Google Patents

Rotary magnetic head assembly

Info

Publication number
JPS61178717A
JPS61178717A JP1792185A JP1792185A JPS61178717A JP S61178717 A JPS61178717 A JP S61178717A JP 1792185 A JP1792185 A JP 1792185A JP 1792185 A JP1792185 A JP 1792185A JP S61178717 A JPS61178717 A JP S61178717A
Authority
JP
Japan
Prior art keywords
magnetic head
screw
head
head base
height
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.)
Pending
Application number
JP1792185A
Other languages
Japanese (ja)
Inventor
Shuzo Seo
修三 瀬尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP1792185A priority Critical patent/JPS61178717A/en
Publication of JPS61178717A publication Critical patent/JPS61178717A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent the deterioration in contacting ability of a tape and the drop of a recording and reproducing level, which is caused by said deterioration, by adjusting vertically the position of an overall head base. CONSTITUTION:The screwing amount with respect to the screw hole 24 of a set screw 23 is changed to adjust the height position of a magnetic head 21. Namely, a height adjusting member 25 is positioned at the intermediate part of a pair of set screws 23, plays the role of a spring and always presses the head base 20 to the head part of the screw 23, and therefore the position of the head base 20, that is, the position of he magnetic head 21, is regulated by the screw position of the set screw 23. Since the head base 20 moves in the axial direction of said screw 23, the screw amount of a pair of the set screws 23 is appropriately set to adjust the height of the magnetic head 21 without inclination.

Description

【発明の詳細な説明】 「技術分野」 本発明は、VTRの回転磁気ヘッドアッセンブリに関し
、特にその磁気ヘッドの高さ調節機構に関する。
TECHNICAL FIELD The present invention relates to a rotating magnetic head assembly for a VTR, and more particularly to a height adjustment mechanism for the magnetic head.

「従来技術およびその問題点」 VTRの回転磁気ヘッドアッセンブリは、下部の固定シ
リンダ上に、磁気ヘッドを有する回転シリンダを回転自
在に支持している。磁気へ一2ドは回転シリンダの外周
面に突出するもので、ヘッドベースに一体にされており
、このヘッドベースが回転シリンダ下面にねじ止め固定
される0周知のように、この磁気ヘッドは回転シリンダ
の回転に伴ない、回転シリンダに斜めに巻かれて走行す
る磁気記録テープに対し、いわゆるヘリカルスキャン方
式により記録再生を行なう、この磁気ヘッドは製造時に
その高さ位置を調節する必要があり、このため従来、第
3図に示すような調整構造が用いられていた。
"Prior Art and its Problems" A rotating magnetic head assembly for a VTR includes a rotating cylinder having a magnetic head rotatably supported on a lower fixed cylinder. The magnetic head protrudes from the outer peripheral surface of the rotating cylinder and is integrated with the head base, and this head base is fixed to the lower surface of the rotating cylinder with screws.As is well known, this magnetic head This magnetic head uses a so-called helical scan method to record and reproduce information on a magnetic recording tape that is wound diagonally around a rotating cylinder and runs as the cylinder rotates.The height of this magnetic head must be adjusted during manufacturing. For this reason, an adjustment structure as shown in FIG. 3 has conventionally been used.

同図において、11は回転シリンダであり、鎖線で示す
固定シリンダ12の上に回転自在に支持される。この回
転シリンダ11の下面には、固定ねじ13でヘッドベー
ス14が固定されており。
In the figure, 11 is a rotating cylinder, which is rotatably supported on a fixed cylinder 12 indicated by a chain line. A head base 14 is fixed to the lower surface of the rotating cylinder 11 with a fixing screw 13.

このヘッドベース14の半径方向外方の先端に磁気ヘッ
ド15が一体に設けられている0回転シリンダ11には
、固定ねじ13とは反対の上面側から高さ調節ねじ16
が螺合されており、この高さ調節ねじ16は、固定ねじ
13より半径方向の外側位置においてへラドペース14
に接触する。
The 0-rotation cylinder 11, in which the magnetic head 15 is integrally provided at the radially outer tip of the head base 14, has a height adjustment screw 16 from the upper surface side opposite to the fixing screw 13.
are screwed together, and this height adjusting screw 16 is located at a position radially outward from the fixing screw 13.
come into contact with.

このヘッドベース14の固定構造によれば、高さ調節ね
じ16を回転シリンダ11に深く螺合させてヘッドベー
ス14を押すと、ヘッドベース14が撓むため、磁気へ
ラド15の高さ位置を調節することができる。しかしな
がらこの高さ調節は、ヘッドベース14の撓みを利用し
ているために、磁気へラド15の先端は図にθで示すよ
うに角度を変化させてしまう、このため磁気記録テープ
と磁気へラド15との接触性が悪くなり、記録再生レベ
ルの低下を招くという問題があることが判明した。
According to this fixing structure of the head base 14, when the height adjustment screw 16 is deeply screwed into the rotary cylinder 11 and the head base 14 is pushed, the head base 14 is bent, so the height position of the magnetic helad 15 is adjusted. Can be adjusted. However, since this height adjustment utilizes the deflection of the head base 14, the tip of the magnetic helad 15 changes the angle as shown by θ in the figure. It has been found that there is a problem in that the contact with 15 deteriorates, leading to a decrease in the recording and reproducing level.

「発明の目的」 本発明は、この問題点の発見に基づき、磁気ヘッドの高
さ調節を行なっても、テープとの接触性の悪化、および
これに起因する記録再生レベルの低下が生じない回転磁
気へ一2ドアッセンブリを(与ることを目的とする。
``Object of the Invention'' Based on the discovery of this problem, the present invention aims to provide a magnetic head that can be rotated without deteriorating the contact with the tape and causing a decrease in the recording and reproducing level even if the height of the magnetic head is adjusted. The purpose is to provide a two-door assembly (to magnetism).

「発明の概要」 本発明は、従来装置の問題点が結局、上記のようにヘッ
ドベースを撓ませて行なうことによって生じるという解
析に基づき、ヘッドベース全体を上下位置調節可能にす
るもので、ヘッドベースを回転シリンダに固定する固定
ねじを少なくとも一対設け、上記回転シリンダとへ−I
ドベースとの間に、この一対の固定ねじの間に位置する
弾性材料からなる高さ調節部材を挟着したことを特徴と
している。
"Summary of the Invention" The present invention is based on the analysis that the problems of conventional devices are caused by bending the head base as described above, and the present invention makes the entire head base vertically adjustable. Provide at least one pair of fixing screws for fixing the base to the rotating cylinder, and connect the base to the rotating cylinder.
A height adjusting member made of an elastic material is sandwiched between the base and the pair of fixing screws.

「発明の実施例) 以下図示実施例について本発明を説明する。第1図、第
2図において、回転シリンダ11および固定シリンダ1
2は従来装置と同一の要素である。ヘッドベース20は
、第2図に平面形状を示すように、回転シリンダ11の
直径の半分程度の横長に形成されていて、その長手方向
と直交する関係で磁気ヘッド21が一体に固定されてい
る。
Embodiments of the Invention The present invention will be described below with reference to illustrated embodiments. In FIGS. 1 and 2, a rotating cylinder 11 and a fixed cylinder 1
2 is the same element as the conventional device. As shown in a plan view in FIG. 2, the head base 20 is formed in a horizontally elongated shape approximately half the diameter of the rotating cylinder 11, and a magnetic head 21 is integrally fixed thereto in a relationship perpendicular to the longitudinal direction of the head base 20. .

ヘッドベース20にはその長手方向の両端部に、固定ね
じの挿通孔22が穿けられていて、この挿通孔22に挿
入した一対の固定ねじ23が回転シリンダ11のねじ孔
24に螺合している。そしてこのヘッドベース20と回
転シリンダ11の間には、弾性材料からなる高さ調節部
材25が挟着され、ヘッドベース20の固定状態ではこ
の高さ調節部材25が圧縮変形している。この高さ調節
部材25は一対の固定ねじ23の中間に位置している。
The head base 20 has insertion holes 22 for fixing screws at both longitudinal ends thereof, and a pair of fixing screws 23 inserted into the insertion holes 22 are screwed into the screw holes 24 of the rotating cylinder 11. There is. A height adjusting member 25 made of an elastic material is sandwiched between the head base 20 and the rotating cylinder 11, and the height adjusting member 25 is compressed and deformed when the head base 20 is fixed. This height adjustment member 25 is located between the pair of fixing screws 23.

上記構成の本回転磁気ヘッドは、固定ねじ23のねじ孔
24に対する螺合量を変えることで、m気ヘッド21の
高さ位置を調節することができる。すなわち高さis部
材25は、一対の固定ねじ23の中間部に位置していて
ばねの役割をし、常にヘッドベース20を固定ねじ23
の頭部に押圧しているため、ヘッドベース20の位置、
つまり磁気ヘッド21の位置は、固定ねじ23の螺合位
置によって規制される。そしてヘッドベース20は、固
定ねじ23の軸方向に移動するから、一対の固定ねじ2
3の螺合量を適当に設定することにより、磁気ヘッド2
1の高さ位置を11j!きを生じることなく調節するこ
とができる。
In the present rotary magnetic head having the above configuration, the height position of the magnetic head 21 can be adjusted by changing the amount of engagement of the fixing screw 23 with the screw hole 24. In other words, the height is member 25 is located in the middle of the pair of fixing screws 23 and acts as a spring, and always keeps the head base 20 connected to the fixing screws 23.
Because it is pressed against the head of the head, the position of the head base 20,
In other words, the position of the magnetic head 21 is regulated by the screwing position of the fixing screw 23. Since the head base 20 moves in the axial direction of the fixing screw 23, the pair of fixing screws 2
By appropriately setting the screwing amount of 3, the magnetic head 2
The height position of 1 is 11j! It can be adjusted without causing any damage.

「発明の効果」 以上のように本発明の回転磁気ヘッドアッセンブリによ
れば、回転シリンダに固定ねじを介して固定されるヘッ
ドベースの上下位置を傾きを生じさせずに調節すること
ができる。よってヘッドベースに一体に設けられる磁気
ヘッドにも高さ調節に伴なう傾きが生じないため、磁気
ヘッドと磁気記録テープとの接触性が悪化することがな
く、記録再生時のレベルの低下を生じることがない。
[Effects of the Invention] As described above, according to the rotating magnetic head assembly of the present invention, the vertical position of the head base fixed to the rotating cylinder via the fixing screw can be adjusted without causing any inclination. Therefore, since the magnetic head integrated with the head base does not tilt due to height adjustment, the contact between the magnetic head and the magnetic recording tape does not deteriorate, and the level drop during recording and reproduction is prevented. It never occurs.

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

第1図は本発明の回転磁気ヘッドアッセンブリの実施例
を示す一部を断面とした正面図、第2図は第1図の底面
図、第3図は従来の回転磁気へラドアッセンブリを示す
一部を断面とした正面図である。 11・・・回転シリンダ、12・・・固定シリンダ、2
0・・・ヘッドベース、2トド・磁気ヘッド、23・・
・固定ねじ、24・・・ねじ孔、25・・・高さ調節部
材。 特許出願人  旭光学工業株式会社 同代理人    三 浦 邦 夫 回   松井 茂
FIG. 1 is a partially sectional front view showing an embodiment of the rotating magnetic head assembly of the present invention, FIG. 2 is a bottom view of FIG. 1, and FIG. 3 is a diagram showing a conventional rotating magnetic head assembly. FIG. 11... Rotating cylinder, 12... Fixed cylinder, 2
0... Head base, 2 Tod magnetic head, 23...
- Fixing screw, 24...screw hole, 25...height adjustment member. Patent applicant Asahi Optical Co., Ltd. Agent Kuni Miura Shigeru Matsui

Claims (1)

【特許請求の範囲】[Claims] (1)固定シリンダ上に、回転シリンダを回転自在に支
持し、この回転シリンダの下面に、該回転シリンダの外
周面に突出する磁気ヘッドを有するヘッドベースを固定
ねじを介して固定する回転磁気ヘッドアッセンブリにお
いて、上記固定ねじを少なくとも一対設け、上記回転シ
リンダとヘッドベースとの間に、この一対の固定ねじの
間に位置する弾性材料からなる高さ調節部材を挟着した
ことを特徴とする回転磁気ヘッドアッセンブリ。
(1) A rotary cylinder is rotatably supported on a fixed cylinder, and a rotary magnetic head is fixed to the lower surface of the rotary cylinder via a fixing screw, the head base having a magnetic head protruding from the outer peripheral surface of the rotary cylinder. In the assembly, at least one pair of the fixing screws is provided, and a height adjusting member made of an elastic material is sandwiched between the rotating cylinder and the head base, and is located between the pair of fixing screws. magnetic head assembly.
JP1792185A 1985-02-01 1985-02-01 Rotary magnetic head assembly Pending JPS61178717A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1792185A JPS61178717A (en) 1985-02-01 1985-02-01 Rotary magnetic head assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1792185A JPS61178717A (en) 1985-02-01 1985-02-01 Rotary magnetic head assembly

Publications (1)

Publication Number Publication Date
JPS61178717A true JPS61178717A (en) 1986-08-11

Family

ID=11957228

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1792185A Pending JPS61178717A (en) 1985-02-01 1985-02-01 Rotary magnetic head assembly

Country Status (1)

Country Link
JP (1) JPS61178717A (en)

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