JPS5834565Y2 - Disc recording media cutting needle - Google Patents

Disc recording media cutting needle

Info

Publication number
JPS5834565Y2
JPS5834565Y2 JP906976U JP906976U JPS5834565Y2 JP S5834565 Y2 JPS5834565 Y2 JP S5834565Y2 JP 906976 U JP906976 U JP 906976U JP 906976 U JP906976 U JP 906976U JP S5834565 Y2 JPS5834565 Y2 JP S5834565Y2
Authority
JP
Japan
Prior art keywords
cutting
static electricity
cutting needle
needle
disc recording
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
Application number
JP906976U
Other languages
Japanese (ja)
Other versions
JPS52101402U (en
Inventor
勲 大脇
伸司 中村
由幸 土金
Original Assignee
日本ビクター株式会社
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 日本ビクター株式会社 filed Critical 日本ビクター株式会社
Priority to JP906976U priority Critical patent/JPS5834565Y2/en
Priority to US05/729,669 priority patent/US4105213A/en
Publication of JPS52101402U publication Critical patent/JPS52101402U/ja
Application granted granted Critical
Publication of JPS5834565Y2 publication Critical patent/JPS5834565Y2/en
Expired legal-status Critical Current

Links

Description

【考案の詳細な説明】 本考案は円盤記録媒体上に情報信号を切削記録する円盤
記録媒体用切削針に係り、特にダイヤモンド切削針本体
のミラー面中所定位置のみにラッカー盤切削屑との摩擦
時に静電気の発生しにくい静電気発生不良体を埋設し、
切削屑を上記静電気発生不良体に当接させ、切削屑、切
削溝及び切削針に静電気が殆ど発生しないよう構成し、
且つ安価に製造しうるよう構成した切削針を提供するこ
とを目的とする。
[Detailed description of the invention] The present invention relates to a cutting needle for a disk recording medium that cuts and records information signals on the disk recording medium, and in particular, friction with lacquer cutting waste is applied only to a predetermined position on the mirror surface of the diamond cutting needle body. At times, we bury static-generating defective objects that do not easily generate static electricity.
The cutting waste is brought into contact with the static electricity generating defective body, and the cutting waste, the cutting groove and the cutting needle are configured to generate almost no static electricity,
Another object of the present invention is to provide a cutting needle that can be manufactured at low cost.

一般に、ダイヤモンド切削針によりアセテート、或いは
塩化ビニール系樹脂材の円盤記録媒体(ラッカー盤)上
に溝を切削する際、切削針と円盤記録媒体及び切削屑に
摩擦により静電気が発生する。
Generally, when a diamond cutting needle cuts a groove on a disc recording medium (lacquer disc) made of acetate or vinyl chloride resin, static electricity is generated due to friction between the cutting needle, the disc recording medium, and cutting waste.

このため、切削屑とダイヤモンド切削針及びラッカー盤
とに異種の電荷が帯電し、両者間に生ずるクーロン力に
より切削屑が切削溝に付着してしまい、確実に切削屑を
除去し得す、切削に支障をきたす不都合を生ずる。
For this reason, the cutting waste, the diamond cutting needle, and the lacquer disk are charged with different types of charges, and the cutting waste adheres to the cutting groove due to the Coulomb force generated between them, making it difficult to remove the cutting waste reliably. This may cause inconvenience that may interfere with

そこで本出願人は上記不都合を除去すべく、先に実願昭
50−139372号により、ダイヤモンド切削針のミ
ラー面の略全体にラッカー盤の切削屑との摩擦時に静電
気の発生しにくいサファイヤ薄板を設け、切削により生
じた切削屑がサファイヤ薄板に当接して案内されるよう
構成した切削針を提案した。
Therefore, in order to eliminate the above-mentioned inconvenience, the present applicant previously proposed in Utility Application No. 139372/1983 to cover almost the entire mirror surface of a diamond cutting needle with a thin sapphire plate that is less likely to generate static electricity when it rubs against cutting waste from a lacquer disk. We have proposed a cutting needle configured so that the cutting waste generated during cutting is guided by contacting the thin sapphire plate.

この切削針によればサファイヤ薄板の存在により静電気
の発生は大きく抑制される。
According to this cutting needle, the generation of static electricity is greatly suppressed due to the presence of the sapphire thin plate.

しかし、この切、削針においては、サファイヤ薄板とし
て比較的太なるものを必要とされ、且つこれを埋設する
場合に際してミラー面のはマ全面に凹部を形成する困難
な加工を要し、製造が比較的困難であると共に高価とな
る問題点があった。
However, this cutting and sharpening needle requires a relatively thick sapphire thin plate, and when embedding it, a difficult process is required to form a recess on the entire surface of the mirror surface, making it difficult to manufacture. There were problems in that it was relatively difficult and expensive.

本考案は上記問題点を解決したものであり、以下図面と
共にその各実施例について説明する。
The present invention solves the above-mentioned problems, and each embodiment thereof will be described below with reference to the drawings.

第1図A及びBは夫々本考案になる切削針の第1実施例
の正面図及び縦断側面図を示す。
FIGS. 1A and 1B show a front view and a vertical side view, respectively, of a first embodiment of a cutting needle according to the present invention.

両図に示す切削針1において、ダイヤモンド切削針本体
2はそのミラー面3中先端切削部4の近傍の所定位置の
みに部分的に静電気発生不良体であるサファイヤ小片5
を埋設して大略構成しである。
In the cutting needle 1 shown in both figures, the diamond cutting needle main body 2 has a small sapphire piece 5 which is a defective body that generates static electricity only at a predetermined position near the tip cutting part 4 in the mirror surface 3 of the diamond cutting needle body 2.
It is roughly composed of .

サファイヤ小片5の円形露出面5aはミラー面3と略同
一平面に形成してあり、且つその径りは40μ扉程度と
してあり、その下端部の切削部4の先端に対する離間寸
法dは20μ扉程度としである。
The circular exposed surface 5a of the small sapphire piece 5 is formed on substantially the same plane as the mirror surface 3, and its diameter is approximately 40 μm, and the distance d of its lower end from the tip of the cut portion 4 is approximately 20 μm. It's Toshide.

なお、上記寸法dはこれを小とすることにより、後述す
る切削時に切り出された切削屑がダイヤモンド面上を案
内される距離がそれだけ短かくなり、静電気の発生を防
止する上で好ましい。
It should be noted that by making the dimension d small, the distance that chips cut out during cutting, which will be described later, are guided on the diamond surface becomes correspondingly shorter, which is preferable in terms of preventing the generation of static electricity.

しかし、上記寸法d及びDは切削針本体2の先端部の形
状及び寸法、及び切削部4中切削に直接寄与する部分即
ちミラー面3中逃げ面X及びYとの綾部近傍を切削針本
体の材質であるダイヤモンドの領域で占めることを考慮
することにより相対的に定められる。
However, the above-mentioned dimensions d and D correspond to the shape and dimensions of the tip of the cutting needle body 2, and the portion of the cutting part 4 that directly contributes to cutting, that is, the vicinity of the flanks between the mirror surface 3 and the flanks X and Y of the cutting needle body. It is determined relatively by considering the area occupied by the diamond material.

サファイヤ小片5は円錐形状をなし、ダイヤモンド切削
針本体2の□ラー面3中所定位置にレーザ加工又は機械
加工等により形成された円錐形状凹部6(深さ寸法d、
′==35μ7′rL)内に接着して埋設され、この後
、このミラー面側の突出部を研摩して、□ラー面3と略
同一平面をなす露出面5aが形成される。
The small sapphire piece 5 has a conical shape, and a conical recess 6 (depth dimension d,
'==35μ7'rL), and then the protrusion on the mirror surface side is polished to form an exposed surface 5a that is substantially flush with the square surface 3.

ここで、サファイヤ片5の材質であるサファイヤとラッ
カー盤の材質(例えばニトロアセテート)とは夫々の有
する界面エネルギが略等しく両者を接触させた場合の両
者間の静電ポテンシャルの差が小さい。
Here, the sapphire that is the material of the sapphire piece 5 and the material of the lacquer board (for example, nitroacetate) have approximately the same interfacial energy, and when they are brought into contact, the difference in electrostatic potential between them is small.

このため、下記の切削時に生じた切削屑がサファイヤ表
面を摩擦摺接した際、静電気は切削屑及びサファイヤ片
5に実用上支障となる程には発生しない。
Therefore, when cutting debris generated during the cutting described below comes into frictional contact with the sapphire surface, static electricity is not generated in the cutting debris and the sapphire piece 5 to the extent that it poses a practical problem.

上記切削針1によりラッカー盤を切削する場合、二点鎖
線で示すニトロアセテート製ラッカー盤7は矢印A方向
に回転して切削針本体2の切削部4により切削され、幅
寸法twξ70μの切削溝8が形成される。
When cutting a lacquer disk with the cutting needle 1, the nitroacetate lacquer disk 7 shown by the two-dot chain line rotates in the direction of arrow A and is cut by the cutting part 4 of the cutting needle body 2, and the cutting groove 8 with a width dimension twξ70μ is formed.

一方、切削により生じた切削屑9ば、ミラー面3に案内
され、屈曲して切削方向上前方に押し出される。
On the other hand, chips 9 generated by cutting are guided by the mirror surface 3, bent and pushed forward in the cutting direction.

ここで、切削針1の切削屑9に対する当接案内部分につ
いてみると、その大部分がサファイヤ小片50円形露出
面5aで占め、残りの僅かな部分即ち切削に直接関与す
るミラー面3中逃げ面X及びYとの綾部近傍領域だけが
ダイヤモンドの露出面である。
Here, looking at the abutting guide portion of the cutting needle 1 against the cutting waste 9, most of it is occupied by the circular exposed surface 5a of the small sapphire piece 50, and the remaining small portion is the relief surface in the mirror surface 3 that is directly involved in cutting. Only the region in the vicinity of the twills between X and Y is the exposed surface of the diamond.

このため、切削屑9はその発生後直ちにその大部分を円
形露出面5aに当接して案内される。
Therefore, immediately after the cutting waste 9 is generated, most of the cutting waste 9 comes into contact with the circular exposed surface 5a and is guided.

ここで、円形露出面5aは切削屑9との摩擦時に静電気
の発生しにくい物質であるため、上記切削記録は切削屑
9及びサファイヤ小片5に静電気が殆ど帯電しない状態
で行なわれる。
Here, since the circular exposed surface 5a is made of a material that does not easily generate static electricity when it rubs against the cutting debris 9, the cutting recording is performed in a state where the cutting debris 9 and the sapphire small piece 5 are hardly charged with static electricity.

また、切削屑9とダイヤモンド露出面との当接部分は極
く僅かであるため、ダイヤモンド切削針本体2にも静電
気は殆ど帯電しない。
Further, since the contact portion between the cutting waste 9 and the exposed surface of the diamond is extremely small, the diamond cutting needle body 2 is also hardly charged with static electricity.

このため、切削屑9は切削針1及び切削溝8に付着する
ことなく、所定位置に設けである切削屑除去用パイプ(
図示せず)に吸引されて確実に取り除かれ、切削記録が
支障なく効率よく行なわれる。
Therefore, the cutting waste 9 does not adhere to the cutting needle 1 and the cutting groove 8, and the cutting waste removal pipe (
(not shown) to ensure removal, and cutting records can be performed efficiently without any trouble.

また、上記実施例において、サファイヤ小片5の形状及
び埋設位置は溝幅70μmの切削溝8を形成することを
勧業じて定めてあり、より犬なる幅の切削溝を形成する
場合にはより犬なる円錐形状のサファイヤ小片を適用す
る。
Further, in the above embodiment, the shape and buried position of the small sapphire piece 5 are determined by industry to form a cutting groove 8 with a groove width of 70 μm. Apply a small cone-shaped sapphire piece.

この場合、サファイヤ小片の露出面はより犬なる径の円
形状となり、上記寸法dは200μ胤以下の適宜寸法に
設定しうる。
In this case, the exposed surface of the sapphire piece has a circular shape with a smaller diameter, and the dimension d can be set to an appropriate value of 200 μm or less.

次に本考案切削針の第2実施例について第2図A及びB
と共に説明するに、両図中第1図A及びBに示す構成部
分と同一構成部分には同一符号を付しその説明は省略す
る。
Next, regarding the second embodiment of the cutting needle of the present invention, Fig. 2 A and B
In both figures, the same components as those shown in FIGS. 1A and 1B are denoted by the same reference numerals, and the explanation thereof will be omitted.

切削針10は三角形の薄板片であるサファイヤ小片(静
電気発生不良体)11をダイヤモンド切削針本体2のミ
ラー面3中先端切削部4の近傍に形成された平坦底面凹
部12内に埋設して大略構成しである。
The cutting needle 10 is made by embedding a small sapphire piece (defective static electricity generating material) 11, which is a triangular thin plate piece, in a flat bottom recess 12 formed near the middle tip cutting part 4 of the mirror surface 3 of the diamond cutting needle body 2. It is composed.

このサファイヤ小片11の一面はミラー面3側にこれと
同一平面をなす逆三角形露出面11aとして露出してお
り、この下側頂点は切削部先端に対して微小寸法d1だ
け離間する位置まで延在している。
One surface of this small sapphire piece 11 is exposed on the mirror surface 3 side as an inverted triangular exposed surface 11a that is flush with the mirror surface 3, and the lower apex extends to a position spaced apart by a minute dimension d1 from the tip of the cutting part. are doing.

また、露出面11aの切削部側の周囲、即ち切削に直接
関与する部分はダイヤモンドの露出面としである。
Further, the periphery of the exposed surface 11a on the cutting part side, that is, the part directly involved in cutting, is the exposed surface of diamond.

なお、ここで、サファイヤ小片11は三角形薄板であり
、このミラー面に対する露出面11aは逆三角形状であ
るため、サファイヤ小片11は上記実施例の場合に比べ
て切削針先端により近接した位置に埋設され、露出面1
1aの下端部は切削斜先端部により近接した位置まで延
在している。
Note that here, the sapphire piece 11 is a triangular thin plate, and the exposed surface 11a with respect to this mirror surface has an inverted triangular shape, so the sapphire piece 11 is buried closer to the tip of the cutting needle than in the above embodiment. exposed surface 1
The lower end of 1a extends to a position closer to the cutting bevel tip.

即ち、寸法d1は寸法dより小とされる。That is, the dimension d1 is smaller than the dimension d.

このため、切削針10によりラッカー盤に切削溝を切削
するとき、切削屑は直ちにミラー面3中逆三角形露出面
11aに当接して案内され、切削記録時における切削屑
、切削溝及び切削針10への静電気の発生がより効果的
に抑制され、切削記録が円滑に行なわれる。
Therefore, when a cutting groove is cut on the lacquer disc by the cutting needle 10, the cutting waste immediately comes into contact with the inverted triangular exposed surface 11a in the mirror surface 3 and is guided, and the cutting waste, the cutting groove, and the cutting needle 10 during cutting recording. The generation of static electricity is more effectively suppressed, and cutting records are performed smoothly.

なお、上記各実施例においては、静電気発生不良体とし
てサファイヤ小片5及び11を用いているが、これに限
定されることはなく、比較的高硬度であり且つダイヤモ
ンドとは組成が異なりラッカー盤に対する摩擦により静
電気が発生しにくい物質、例えば、ルビー、セラミック
、フェライト、及び高硬度の金属等を用いることもでき
る。
In each of the above embodiments, sapphire pieces 5 and 11 are used as the static electricity generating defective bodies, but the sapphire pieces are not limited to this. It is also possible to use a material that does not easily generate static electricity due to friction, such as ruby, ceramic, ferrite, and high-hardness metal.

上述の如く、本考案になる円盤記録媒体用切削針によれ
ば、ダイヤモンド切削針本体の切削進向方向前面(ミラ
ー面)中先端近傍位置のみに円盤記録媒体の切削屑との
摩擦時に静電気の発生しにくい材質の静電気発生不良体
を埋設してなり、切削により生じた切削屑が該静電気発
生不良体の上記□ラー面への露出面に当接して案内され
るように構成しであるため、切削時切削屑及び切削針に
殆ど静電気が発生しなく、切削を良好に行ない得、且つ
該静電気発生不良体を□ラー面中先端近傍位置に埋設し
た構成であるため、該静電気発生不良体として極く小さ
な小片を適用し得、且つ埋設用の凹部も小さくてよいた
め簡単に形成し得、従って安価に且つ比較的簡単に製造
出来、更には切削針を接地する特別な機構が必要でなく
、切削針装着部及びカッターヘッドの構成を簡略化し得
る等の特長を有する。
As described above, according to the cutting needle for disk recording media according to the present invention, static electricity is generated only at a position near the middle tip of the front surface (mirror surface) in the cutting direction of the diamond cutting needle main body when it rubs with cutting debris of the disk recording medium. It is constructed by burying a static electricity-generating defective body made of a material that does not easily generate static electricity, so that cutting waste generated by cutting comes into contact with the surface of the static electricity generating defective body exposed to the above-mentioned □ round surface and is guided. During cutting, almost no static electricity is generated in the cutting waste and the cutting needle, and cutting can be performed well, and the static electricity generating defective body is buried in the vicinity of the tip in the □ round surface, so the static electricity generating defective body is It is possible to apply a very small piece as a cutting needle, and it can be easily formed because the recess for embedding can be small. Therefore, it can be manufactured at low cost and relatively easily, and furthermore, a special mechanism for grounding the cutting needle is not required. However, it has the advantage of simplifying the configuration of the cutting needle attachment part and cutter head.

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

第1図A、Bは夫々本考案になる円盤記録媒体用切削針
の第1実施例の正面図、及びその■−■線に沿う縦断側
面図、第2図A、Bは夫々本考案になる切削針の第2実
施例の正面図、及びその■■線に沿う縦断側面図である
。 1.10・・・切削針、2・・・ダイヤモンド切削針本
体、3・・・ミラー面、4・・・切削部、5,11・・
・サファイヤ小片、5a・・・円形露出面、6・・・円
錐形状凹部、7・・・ラッカー盤、8・・・切削溝、9
・・・切削屑、11a・・・逆三角形露出面、12・・
・平坦底面凹部。
Figures 1A and B are a front view of the first embodiment of the cutting needle for disk recording media according to the present invention, and a vertical side view taken along the line ■-■, and Figures 2A and B are respectively according to the present invention. FIG. 2 is a front view of a second embodiment of the cutting needle, and a longitudinal sectional side view taken along the line . 1.10... Cutting needle, 2... Diamond cutting needle body, 3... Mirror surface, 4... Cutting part, 5, 11...
・Sapphire small piece, 5a... circular exposed surface, 6... conical recess, 7... lacquer plate, 8... cutting groove, 9
...Cutting waste, 11a...Inverted triangular exposed surface, 12...
・Flat bottom recess.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 円盤記録媒体上に情報信号を切削記録するダイヤモンド
切削針本体の切削進行方向前面中先端近傍位置のみに該
円盤記録媒体の切削屑との摩擦時に静電気の発生しにく
い材質の静電気発生不良体を埋設してなる円盤記録媒体
用切削針。
A static electricity-generating defective body made of a material that does not easily generate static electricity when it rubs against the cutting waste of the disc recording medium is buried only near the front center tip in the cutting progress direction of the diamond cutting needle body that cuts and records information signals on the disc recording medium. A cutting needle for disc recording media.
JP906976U 1975-10-15 1976-01-29 Disc recording media cutting needle Expired JPS5834565Y2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP906976U JPS5834565Y2 (en) 1976-01-29 1976-01-29 Disc recording media cutting needle
US05/729,669 US4105213A (en) 1975-10-15 1976-10-05 Device for cutting a sound groove on a disc recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP906976U JPS5834565Y2 (en) 1976-01-29 1976-01-29 Disc recording media cutting needle

Publications (2)

Publication Number Publication Date
JPS52101402U JPS52101402U (en) 1977-08-01
JPS5834565Y2 true JPS5834565Y2 (en) 1983-08-03

Family

ID=28469506

Family Applications (1)

Application Number Title Priority Date Filing Date
JP906976U Expired JPS5834565Y2 (en) 1975-10-15 1976-01-29 Disc recording media cutting needle

Country Status (1)

Country Link
JP (1) JPS5834565Y2 (en)

Also Published As

Publication number Publication date
JPS52101402U (en) 1977-08-01

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