JP2952468B2 - Hub mounting structure for information disks - Google Patents

Hub mounting structure for information disks

Info

Publication number
JP2952468B2
JP2952468B2 JP7282382A JP28238295A JP2952468B2 JP 2952468 B2 JP2952468 B2 JP 2952468B2 JP 7282382 A JP7282382 A JP 7282382A JP 28238295 A JP28238295 A JP 28238295A JP 2952468 B2 JP2952468 B2 JP 2952468B2
Authority
JP
Japan
Prior art keywords
hub
disk
center hole
cylindrical portion
metal plate
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 - Fee Related
Application number
JP7282382A
Other languages
Japanese (ja)
Other versions
JPH08212744A (en
Inventor
比呂志 長田
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.)
NIFUKO KK
Original Assignee
NIFUKO KK
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 NIFUKO KK filed Critical NIFUKO KK
Priority to JP7282382A priority Critical patent/JP2952468B2/en
Publication of JPH08212744A publication Critical patent/JPH08212744A/en
Application granted granted Critical
Publication of JP2952468B2 publication Critical patent/JP2952468B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/322—Providing cavities in the joined article to collect the burr
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • B29L2017/005—CD''s, DVD''s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/737—Articles provided with holes, e.g. grids, sieves

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、ディスク本体の中
心部に設けられる情報ディスク用ハブの取付構造に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information disk hub mounting structure provided at the center of a disk body.

【０００２】[0002]

【従来の技術】光磁気ディスク等の情報ディスクには、
例えば、特開昭６２−１９２９４５号公報等に記載され
ているようにディスク本体の中心部に磁性金属板を保持
したハブを設けて、ディスクドライブ装置の小型化を図
るようにしたものが知られている。図６、図７はそのよ
うな情報ディスクの一従来例を示している。この情報デ
ィスクは、センタリング孔付き磁性金属板ａを内周部側
にインサート成形した合成樹脂製のハブｂを有し、ディ
スク本体ｃの中心孔を中心としてその片面に磁性金属板
ａが外側に位置するよう固定したものである。2. Description of the Related Art Information disks such as magneto-optical disks include:
For example, as disclosed in Japanese Patent Application Laid-Open No. Sho 62-192945, a disk drive device is provided in which a hub holding a magnetic metal plate is provided at the center of the disk body to reduce the size of the disk drive device. ing. 6 and 7 show a conventional example of such an information disk. This information disc has a hub b made of a synthetic resin in which a magnetic metal plate a with a centering hole is insert-molded on the inner peripheral side, and the magnetic metal plate a is disposed on one side with the center hole of the disk body c as a center. It is fixed so that it is located.

【０００３】ここで、ハブｂは合成樹脂製の環状となっ
ており、内周部の片端面側に磁性金属板ａがインサート
成形によって同ハブ端面と略面一となるよう設けられて
いる。図７はその成形型ｆを示し、磁性金属板ａが成形
型ｆ内にあって突き出しピンｇに保持された状態で一体
にインサート成形される。そして、ディスク本体ｃの上
に図６の如くハブｂを位置決め載置し、ハブｂの上から
超音波ホーンを押し当てた状態で超音波振動を印加し、
前記ハブｂに設けられた不図示の融着用リブを溶融して
ディスク本体ｃに固定される。The hub b has a ring shape made of synthetic resin, and a magnetic metal plate a is provided on one end surface side of the inner peripheral portion so as to be substantially flush with the hub end surface by insert molding. FIG. 7 shows the molding die f, in which the magnetic metal plate a is insert-molded integrally with the molding metal f while being held by the protruding pins g. Then, the hub b is positioned and mounted on the disk main body c as shown in FIG. 6, and an ultrasonic vibration is applied while an ultrasonic horn is pressed from above the hub b,
The fusion rib (not shown) provided on the hub b is melted and fixed to the disk body c.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、前述の
ような磁性金属板ａをハブｂにインサート成形により設
けて、ディスク本体ｃの片面にハブｂを固定する構造に
あっては次のような問題があった。インサート成形時に
は、磁性金属板ａの外周部を段差部ｄに折曲形成しハブ
ｂ内に埋設して押え部ｅで保持するようにしているが、
ハブｂが磁性金属板ａ側へ湾曲するように反り易く、こ
のハブｂの反りによりディスク本体ｃにハブｂを精度よ
く位置決めし難くく、一体化操作時にガタ付き設計通り
の固定強度を安定して付与できなかった。これは、例え
ばハブｂを超音波溶着により固定する場合、ハブｂを治
具の窪み部にセットした状態で行うようにしているが、
図６の如くディスク本体ｃの片面上にハブｂを単に載せ
た状態になっており、磁性金属板ａと樹脂との熱膨張量
に差が生じて基準面を水平に保ち難いことにも起因して
いる。However, there is the following problem in the structure in which the magnetic metal plate a is provided on the hub b by insert molding and the hub b is fixed to one surface of the disk body c. was there. At the time of insert molding, the outer peripheral portion of the magnetic metal plate a is bent at the step portion d, embedded in the hub b, and held by the holding portion e.
The hub b is easily warped so as to bend toward the magnetic metal plate a, and the warp of the hub b makes it difficult to accurately position the hub b on the disk main body c. Could not be granted. This is performed, for example, when the hub b is fixed by ultrasonic welding while the hub b is set in the recess of the jig.
As shown in FIG. 6, the hub b is simply placed on one surface of the disk main body c, which causes a difference in the amount of thermal expansion between the magnetic metal plate a and the resin, which makes it difficult to keep the reference surface horizontal. doing.

【０００５】本発明は、上記問題点に鑑みてなされたも
のであり、ディスク本体に対する位置だしおよび固定強
度を確実に得ることができ、またハブの固定部をより薄
くできるようにした情報ディスク用ハブの取付構造を提
供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention for an information disk in which positioning and fixing strength with respect to a disk main body can be reliably obtained, and a fixing portion of a hub can be made thinner. An object of the present invention is to provide a hub mounting structure.

【０００６】[0006]

【課題を解決するための手段】上記目的を達成するため
本発明は、樹脂製のハブが環状の内周部片端面側に設け
られた磁性金属板を有して、ディスク本体の中心孔を中
心としてディスク本体片面に溶着により固定される情報
ディスク用ハブの取付構造において、前記ハブは、前記
ディスク本体の中心孔に挿通される筒部と、前記筒部の
基部周囲に形成された薄肉鍔部と、前記薄肉鍔部に設け
られて前記ディスク本体の中心孔縁に対応するバリ用逃
げ溝およびこの逃げ溝よりも外側鍔部分に突出形成され
た溶融用リブと、前記磁性金属板の外周部をテーパーを
介在して一段落ち込んだ段差部に形成し、前記筒部の突
出端面側にその段差部を埋設して前記磁性金属板を一体
化していると共に、前記段差部の上側折曲縁から上開き
状のテーパーで、かつ所定の高さ（ｈ）に形成された突
起部とを一体に有し、前記ディスク本体の中心孔に前記
筒部を挿通して、前記筒部の突出端面側を中心孔内から
突き出した状態で前記ハブを前記ディスク本体に位置決
めし、前記溶融用リブを溶融することにより、前記ディ
スク本体の片面と前記薄肉鍔部とが前記ディスク本体側
のバリ等を前記逃げ溝内に逃がして隙間なく一体に接合
されるようにしたものである。In order to achieve the above object, the present invention provides a resin hub having a magnetic metal plate provided on one end surface side of an annular inner peripheral portion, and a center hole of a disk main body. In the mounting structure of an information disk hub fixed by welding to one surface of a disk body as a center, the hub comprises a cylindrical portion inserted into a center hole of the disk body, and a thin flange formed around a base of the cylindrical portion. A burring relief groove provided in the thin flange portion and corresponding to the center hole edge of the disk body, and a melting rib protruding from an outer flange portion beyond the relief groove; and an outer periphery of the magnetic metal plate. Tapered part
The magnetic metal plate is formed integrally with the stepped portion that is interposed and lowered by one step, and the stepped portion is buried on the protruding end face side of the cylindrical portion.
And open upward from the upper bent edge of the step
Projecting with a tapered shape and a predetermined height (h)
And a raised portion integrally inserted through the tubular portion in the center hole of the disk body, the hub is positioned on the disk body in a state in which the projecting end face of the cylindrical portion projecting from the center hole, By melting the melting rib, one surface of the disk main body and the thin flange portion allow a burr or the like on the disk main body side to escape into the escape groove and be integrally joined without a gap. .

【０００７】以上の構成によれば、ハブはその筒部をデ
ィスク本体の中心孔に挿通されていること、前記中心孔
の筒部の突出端面側に磁性金属板を設けるようにして薄
肉鍔部を構造的に薄くできるようにしたことによって、
取付時の位置決め操作および固定強度などが大きく改良
される。According to the above arrangement, the hub has a cylindrical portion inserted through the center hole of the disk body, and a magnetic metal plate is provided on the protruding end surface side of the cylindrical portion of the center hole to form the thin flange portion. By making it structurally thinner,
The positioning operation at the time of mounting and the fixing strength are greatly improved.

【０００８】[0008]

【発明の実施の形態】以下、本発明の実施の形態例につ
いて図面を用いて詳細に説明する。図１は本発明の要部
断面図、図２は本発明を適用した情報ディスクを示す斜
視図、図３および図４は前記ディスクに用いられている
ハブを示している。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of an essential part of the present invention, FIG. 2 is a perspective view showing an information disk to which the present invention is applied, and FIGS. 3 and 4 show a hub used for the disk.

【０００９】同図の情報ディスクは、円盤状のディスク
本体１と、ディスク本体１の中心孔２に固着一体化され
る合成樹脂製のハブ３とから概略構成されている。ディ
スク本体１は従来とほぼ同一構成となっており、例え
ば、樹脂成形基板上に光磁気方式により情報信号の記録
が行われる信号記録層を設けるとともに、その表面上に
保護層を積層して形成される。ディスク本体１には中心
孔２が設けられ、中心孔２に一部を挿入した状態でハブ
３が超音波溶着により固定されている。The information disk shown in FIG. 1 is roughly composed of a disk-shaped disk main body 1 and a synthetic resin hub 3 fixedly integrated with a center hole 2 of the disk main body 1. The disk main body 1 has substantially the same configuration as that of the related art. For example, a signal recording layer on which an information signal is recorded by a magneto-optical method is provided on a resin molded substrate, and a protective layer is laminated on the surface thereof. Is done. A center hole 2 is provided in the disk main body 1, and a hub 3 is fixed by ultrasonic welding with a part of the center hole 2 inserted.

【００１０】ハブ３はポリカーポネート等の樹脂を射出
成形したもので、中心孔２に挿入される筒部４と、筒部
４の基部周囲に突出形成された薄肉鍔部５とを有し、ま
た成形時にインサートされた磁性金属板６を筒部４にお
ける突出端面側の内周部に保持している。薄肉鍔部５に
おける筒部４の立ち上がり側には、筒部４の基部周囲に
逃げ溝５ａが形成されるとともに、逃げ溝５ａの外側に
溶融用のリブ５ｂが突設されている。更にリブ５ｂの内
側と外側には吸収溝５ｃがそれぞれ同心円状に設けられ
ている。The hub 3 is made by injection molding a resin such as polycarbonate, and has a cylindrical portion 4 inserted into the center hole 2 and a thin flange portion 5 formed to protrude around the base of the cylindrical portion 4. The magnetic metal plate 6 inserted at the time of molding is held on the inner peripheral portion of the cylindrical portion 4 on the side of the protruding end face. On the rising side of the cylindrical portion 4 in the thin flange portion 5, a relief groove 5a is formed around the base of the cylindrical portion 4, and a melting rib 5b is projected outside the relief groove 5a. Further, absorption grooves 5c are provided concentrically inside and outside the rib 5b.

【００１１】磁性金属板６は、板厚ｔが約２ミリの磁性
ステンレス等をプレス成形したものであり、中心部にセ
ンタリング孔６ａが設けられるとともに、外周部がテー
パー部を介在して一段落ち込んだ段差部６ｂとなってい
る。The magnetic metal plate 6 is formed by press-molding a magnetic stainless steel or the like having a thickness t of about 2 mm. A centering hole 6a is provided at the center, and the outer peripheral part is lowered by one step through a tapered part. It is a stepped portion 6b.

【００１２】図５は磁性金属板６のインサート成形を模
式的に示している。インサート成形においては、段差部
６ｂが筒部４の内周部片端面側の内部に埋設されるよう
に成形金型７内に下型や突き出しピン８等により位置決
め保持される。ここで、成形金型７の上型成形面には、
段差部６ｂの上部に所定厚の突起部４ａを形成するよう
形状設定される。つまり、この突起部４ａに対する成形
面は、磁性金属板６における段差部６ｂの略上側折曲縁
から上開き状のテーパーを形成すべく設計され、かつ段
差部６ｂの上部に少なくとも磁性金属板６の板厚ｔより
も高くなるようになっている。FIG. 5 schematically shows the insert molding of the magnetic metal plate 6. In the insert molding, the stepped portion 6b is positioned and held in the molding die 7 by a lower die, a protruding pin 8, and the like so that the stepped portion 6b is embedded inside one end surface of the inner peripheral portion of the cylindrical portion 4. Here, on the upper molding surface of the molding die 7,
The shape is set so as to form a projection 4a having a predetermined thickness on the upper part of the step 6b. In other words, the molding surface for the projection 4a is designed to form an upwardly open taper from the substantially upper bent edge of the step 6b of the magnetic metal plate 6, and at least the magnetic metal plate 6 is formed above the step 6b. Is greater than the plate thickness t.

【００１３】インサート成形後の反りについては、突起
部４ａの高さｈが０に近づくほど反り易く、逆に高さｈ
を大きくするほど反り難くなることが判明した。この理
由としては、突起部４ａを大きくして補強することで、
熱収縮差による影響を防ぎ、反り発生を阻止するものと
考えられる。As for the warpage after the insert molding, as the height h of the projection 4a approaches 0, the warp is more likely to occur.
It was found that the larger the value, the more difficult it was to warp. The reason for this is that by increasing the size of the projection 4a and reinforcing it,
It is considered that the influence of the difference in heat shrinkage is prevented and the occurrence of warpage is prevented.

【００１４】以上のハブ３は、ディスク本体１の中心孔
２に筒部４を挿入して位置出しセットされ、薄肉鍔部５
の外面側から超音波溶着等の手段でディスク本体１に固
定される。この場合、ディスク本体１に対するセット操
作では、中心孔２に筒部４を挿入した状態で行うこと、
ハブ３の反りがほぼなくなったこと、中心孔２の内周縁
にバリがある場合に図１の拡大図の如く同バリが逃げ溝
５ａ内に位置すること、等により位置出しが容易に行え
る。The hub 3 described above is set in position by inserting the cylindrical portion 4 into the center hole 2 of the disk main body 1.
Is fixed to the disk main body 1 by means of ultrasonic welding or the like from the outer surface side. In this case, the setting operation for the disk main body 1 is performed in a state where the cylindrical portion 4 is inserted into the center hole 2;
The warpage of the hub 3 is almost eliminated, and when there is a burr on the inner peripheral edge of the center hole 2, the burr is located in the escape groove 5a as shown in the enlarged view of FIG.

【００１５】また、例えば超音波溶着による固定操作で
は、超音波ホーンを押し当てて超音波振動を印化するこ
とにより、リブ５ｂが溶融しこの溶融を介してディスク
本体１と固定一体化される。この場合、筒部４と別個の
薄肉鍔部５を設けたので、超音波ホーンの当接部を容易
に安定化できることに加えて、ハブ３が反っていないの
でガタ付きがなく安定した状態で行えること、ハブ３を
治具の窪み部にセットしたときに一段高くなった突起部
４ａにより、磁性金属板６と樹脂との熱膨張量に差が生
じても基準面を水平に保ち易くなること、リブ５ｂの溶
融した一部が吸収溝５ｃへ流れ込んで精度のよい接面状
態が保たれることなどから、安定した強固な結合が確実
に得られるのである。In a fixing operation by, for example, ultrasonic welding, the ultrasonic vibration is applied by pressing an ultrasonic horn to melt the rib 5b, and the rib 5b is fixed and integrated with the disk main body 1 through the melting. . In this case, since the thin flange portion 5 provided separately from the cylindrical portion 4 is provided, the contact portion of the ultrasonic horn can be easily stabilized. In addition, since the hub 3 is not warped, there is no play in the stable state. What can be done is that, when the hub 3 is set in the recess of the jig, the projection 4a which is raised one step makes it easy to keep the reference plane horizontal even if there is a difference in the amount of thermal expansion between the magnetic metal plate 6 and the resin. In addition, since a part of the rib 5b that has melted flows into the absorption groove 5c to maintain an accurate contact surface state, a stable and strong connection can be reliably obtained.

【００１６】[0016]

【発明の効果】以上説明したとおり、本発明に係る情報
ディスク用ハブの取付構造によれば、ハブは筒部と、筒
部の基部に設けられて溶融用リブおよびバリ用逃げ溝付
き薄肉鍔部と、筒部の突出端面側に設けられた磁性金属
板とからなり、ディスク本体の中心孔に筒部を挿通し
て、前記薄肉鍔部をディスク本体の片面に密接するとと
もに筒部の突出端面側を中心孔内から突き出した状態で
位置決めして固定するので、ハブの位置決め操作がスム
ースに行えて、安定した強固な結合を確実に得ることが
できる。また、磁性金属板を筒部の突出端面側に設けた
のでディスク本体に対してハブの固定部である薄肉鍔部
を構造的に薄くできる。As described above, according to the information disk hub mounting structure of the present invention, the hub is provided at the base of the cylindrical portion and the thin rib with the melting rib and the burring escape groove. Part, and a magnetic metal plate provided on the protruding end face side of the cylindrical part. The cylindrical part is inserted through the center hole of the disk main body, and the thin flange portion is brought into close contact with one surface of the disk main body and the cylindrical part is projected. Since the end face side is positioned and fixed while protruding from the center hole, the hub can be positioned smoothly, and a stable and strong connection can be reliably obtained. In addition, since the magnetic metal plate is provided on the protruding end face side of the cylindrical portion, the thin flange portion, which is the fixing portion of the hub, can be structurally thin with respect to the disk body.

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

【図１】本発明の情報ディスク用ハブを取り付けた状態
で示す要部断面図である。FIG. 1 is a cross-sectional view of a main part showing a state where an information disk hub of the present invention is attached.

【図２】本発明を適用した情報ディスクを示す斜視図で
ある。FIG. 2 is a perspective view showing an information disc to which the present invention is applied.

【図３】前記ディスク用ハブを示す斜視図である。FIG. 3 is a perspective view showing the disk hub.

【図４】前記ハブの断面図である。FIG. 4 is a sectional view of the hub.

【図５】磁性金属板のインサート成形を説明する断面模
式図である。FIG. 5 is a schematic cross-sectional view illustrating insert molding of a magnetic metal plate.

【図６】従来例として示す情報ディスクの要部断面図で
ある。FIG. 6 is a sectional view of a main part of an information disk shown as a conventional example.

【図７】前記ディスクのハブ成形を説明する断面模式図
である。FIG. 7 is a schematic cross-sectional view illustrating hub molding of the disk.

【符号の説明】[Explanation of symbols]

１ ディスク本体 ２ 中心孔 ３ ハブ ４ 筒部 ４ａ 突起部 ５ 薄肉鍔部 ５ａ バリ用逃げ溝 ５ｂ 溶融用リブ ６ 磁性金属板 ６ｂ 段差部 ｔ 磁性金属板の厚さ ｈ 突起部の高さ DESCRIPTION OF SYMBOLS 1 Disc main body 2 Center hole 3 Hub 4 Cylindrical part 4a Projection part 5 Thin flange part 5a Burr escape groove 5b Melting rib 6 Magnetic metal plate 6b Step part t Thickness of magnetic metal plate h Height of protrusion

フロントページの続き (56)参考文献 特開 昭62−192945（ＪＰ，Ａ) 特開 昭63−187482（ＪＰ，Ａ) 特開 昭64−50289（ＪＰ，Ａ) 実開 昭61−13375（ＪＰ，Ｕ) 実開 昭63−65181（ＪＰ，Ｕ) 「位置決め技術」、杉田稔著、昭45. 10．31．日刊新聞社発行、Ｐ．125、図 ６．９Continuation of the front page (56) References JP-A-62-192945 (JP, A) JP-A-63-187482 (JP, A) JP-A-64-50289 (JP, A) , U) Japanese Utility Model, Sho 63-65181 (JP, U) "Positioning Technology", Minoru Sugita, 45.10.31. Published by Nikkan Shimbun, p. 125, Fig. 6.9

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 樹脂製のハブが環状の内周部片端面側に
設けられた磁性金属板を有して、ディスク本体の中心孔
を中心としてディスク本体片面に溶着により固定される
情報ディスク用ハブの取付構造において、 前記ハブは、前記ディスク本体の中心孔に挿通される筒
部と、前記筒部の基部周囲に形成された薄肉鍔部と、前
記薄肉鍔部に設けられて前記ディスク本体の中心孔縁に
対応するバリ用逃げ溝およびこの逃げ溝よりも外側鍔部
分に突出形成された溶融用リブと、前記筒部の突出端面
側にその周囲部を埋設された前記磁性金属板とを一体に
有し、 前記ディスク本体の中心孔に前記筒部を挿通して、前記
薄肉鍔部をディスク本体の片面に密接するとともに、前
記筒部の突出端面側を中心孔内から突き出した状態で位
置決めし、前記溶融用リブにより固定することを特徴と
する情報ディスク用ハブの取付構造。1. An information disk, wherein a resin hub has a magnetic metal plate provided on one end surface side of an annular inner peripheral portion, and is fixed to one surface of the disk body by welding around a center hole of the disk body. In the hub mounting structure, the hub is provided on the cylindrical portion inserted into a center hole of the disk body, a thin flange portion formed around a base of the cylindrical portion, and the disk body provided on the thin flange portion. A relief groove for burr corresponding to the edge of the center hole and a melting rib formed so as to protrude from an outer flange portion relative to the relief groove; and the magnetic metal plate having a peripheral portion embedded on a protruding end face side of the cylindrical portion. A state in which the cylindrical portion is inserted into the center hole of the disk main body, the thin flange portion is in close contact with one surface of the disk main body, and the protruding end surface side of the cylindrical portion protrudes from the center hole. And position it with the melting Mounting structure of a hub for information discs, characterized in that the fixing by.
JP7282382A 1995-10-05 1995-10-05 Hub mounting structure for information disks Expired - Fee Related JP2952468B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7282382A JP2952468B2 (en) 1995-10-05 1995-10-05 Hub mounting structure for information disks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7282382A JP2952468B2 (en) 1995-10-05 1995-10-05 Hub mounting structure for information disks

Publications (2)

Publication Number Publication Date
JPH08212744A JPH08212744A (en) 1996-08-20
JP2952468B2 true JP2952468B2 (en) 1999-09-27

Family

ID=17651679

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7282382A Expired - Fee Related JP2952468B2 (en) 1995-10-05 1995-10-05 Hub mounting structure for information disks

Country Status (1)

Country Link
JP (1) JP2952468B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111188768A (en) * 2020-03-09 2020-05-22 常州磅礴泵业有限公司 Oil pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5993387A (en) * 1982-11-19 1984-05-29 Ricoh Co Ltd Thermal recording material
JPS61159271A (en) * 1984-12-29 1986-07-18 Honda Motor Co Ltd Arc spot welding method
JPS62192945A (en) * 1986-02-20 1987-08-24 Sony Corp Information disk
JPS63187482A (en) * 1987-01-30 1988-08-03 Hitachi Ltd Optical disk
JP2593482B2 (en) * 1987-08-21 1997-03-26 株式会社日立製作所 optical disk

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
「位置決め技術」、杉田稔著、昭４５．１０．３１．日刊新聞社発行、Ｐ．１２５、図６．９

Also Published As

Publication number Publication date
JPH08212744A (en) 1996-08-20

Similar Documents

Publication Publication Date Title
EP0705676B1 (en) Metal mould device and a method to mould a disc substrate
US5859834A (en) Optical disc with magnetic member in a recessed portion thereof and method for producing said optical disc
JPH1040578A (en) Substrate for disk
EP0557147B1 (en) Mold device for fabricating disc susbstrate and disc substrate fabricated by this mold device
KR0167797B1 (en) Hub type optical disk and injection molding die for molding its disk substrate
JP2952468B2 (en) Hub mounting structure for information disks
EP1150289A2 (en) Optical disk, substrate of the same, and mold for forming the substrate
US4787009A (en) Optical disk
JP3401795B2 (en) Manufacturing method of disk substrate
JP3264419B2 (en) Recording disk and molding die device
JP3498099B2 (en) Recording media disk
US5498456A (en) Disc cartridge
JP3271072B2 (en) Method of forming disc substrate for recording information signal
JP3072658B2 (en) Information signal recording disk
JP3185832B2 (en) Mold for recording disk molding
JP3208914B2 (en) Disk substrate and mold device for disk substrate molding
JP2000057726A (en) Disk hub
JPH03280279A (en) Optical disk and its production
JP3237213B2 (en) Disc for recording information signals
JP2959208B2 (en) Information signal recording disk
JP3158394B2 (en) Mold for recording disk molding
JP2908005B2 (en) Optical disk substrate
US5667616A (en) Disc cartridge molding method and apparatus
JPH11265527A (en) Disk-type recording medium
JPH1021665A (en) Cartridge for recording medium

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees