JPH074795Y2 - Rotating device having electrostatic bypass structure - Google Patents
Rotating device having electrostatic bypass structureInfo
- Publication number
- JPH074795Y2 JPH074795Y2 JP1986023765U JP2376586U JPH074795Y2 JP H074795 Y2 JPH074795 Y2 JP H074795Y2 JP 1986023765 U JP1986023765 U JP 1986023765U JP 2376586 U JP2376586 U JP 2376586U JP H074795 Y2 JPH074795 Y2 JP H074795Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotating body
- sliding piece
- contact sliding
- contact
- bypass structure
- 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 - Lifetime
Links
Landscapes
- Rotational Drive Of Disk (AREA)
- Elimination Of Static Electricity (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、電子機器等で使用される回転体に帯電する静
電気をバイパスして逃がす構造を有する回転体装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a rotating body device having a structure for bypassing static electricity charged in a rotating body used in an electronic device or the like to escape.
［従来の技術］ 一般に、軸受に保持されて高速回転する回転体は、軸受
部の油膜により非接触潤滑状態となり、回転体とこれを
保持する固定部間は電気的に絶縁状態となっていた。こ
の状態で回転を接続していると回転体に徐々に静電気が
帯電し、ある電荷量に到達すると放電現象を生じてい
た。この放電現象に伴なって電気的ノイズが発生し、隣
接する電子回路の誤動作をまねいていた。[Prior Art] Generally, a rotating body held at a bearing and rotating at a high speed is in a non-contact lubrication state due to an oil film of a bearing portion, and the rotating body and a fixing portion holding the rotating body are electrically insulated from each other. . When the rotation is connected in this state, the rotating body is gradually charged with static electricity, and when a certain amount of charge is reached, a discharge phenomenon occurs. Electrical noise is generated along with this discharge phenomenon, which causes malfunction of an adjacent electronic circuit.
従って従来においては、回転体に帯電する静電気を放電
現象をともなうことなく徐々ににがす為に、回転体の突
起部に接触するチップと、これを保持する金属製の板バ
ネ等で構成される接触摺動片とが用いられていた。Therefore, in the prior art, in order to gradually dissipate the static electricity charged in the rotating body without causing a discharge phenomenon, it is composed of a chip that comes into contact with the protruding portion of the rotating body and a metal leaf spring that holds it. Contact sliding pieces were used.
［解決すべき問題点］ 従って従来の静電気バイパス構造を有する回転体装置に
おいては、接触摺動片が減衰係数の低い質量−バネ系と
して作用するので、接触摺動による摩擦力が加振源とな
り共振現象を生じる欠点があった。すなわち（１）接触
摺動する部分の耐摩耗性が悪化し寿命が短かくなる欠点
があり、また（２）共振音を発生する防音設備を必要と
する欠点があった。[Problems to be Solved] Therefore, in the conventional rotating body device having the electrostatic bypass structure, the contact sliding piece acts as a mass-spring system having a low damping coefficient, and thus the frictional force due to the contact sliding serves as an excitation source. There is a drawback that causes a resonance phenomenon. That is, (1) there is a defect that the wear resistance of the contact sliding portion is deteriorated and the life is shortened, and (2) there is a defect that a soundproofing device that generates resonance noise is required.
［問題点の解決手段］ 本考案の目的は、上述したような従来技術の問題点を解
決し、放電現象を伴うこと無く回転体に帯電した静電気
を逃がすバイパス構造を有する回転体装置を提供するこ
とにある。それゆえ、本考案は、電気伝導性を有し、回
転体の回転中心軸上に設けられた突起部と、電気伝導性
を有し、一端で上記回転体の上記突起部と接触する接触
摺動片と、電気伝導性および粘弾性特性を有し、上記接
触摺動片の他端と嵌合した状態で上記接触摺動片を保持
する保持体とを備えている。[Means for Solving Problems] An object of the present invention is to solve the problems of the conventional technology as described above, and to provide a rotating body device having a bypass structure for discharging static electricity charged in the rotating body without causing a discharge phenomenon. Especially. Therefore, the present invention provides a contact slide that is electrically conductive and that is electrically conductive with a protrusion provided on the rotation center axis of the rotating body and that is in contact with the protrusion of the rotating body at one end. A moving piece and a holding body that has electric conductivity and viscoelasticity and holds the contact sliding piece in a state of being fitted to the other end of the contact sliding piece.
［実施例］ 次に本考案の実施例について添付図面を参照しつつ具体
的に説明する。[Embodiment] Next, an embodiment of the present invention will be specifically described with reference to the accompanying drawings.
第１図は本考案の静電気バイパス構造を有する回転体装
置の一実施例を示す断面図である。第２図は第１図で示
された接触摺動片１の斜視図である。第３図は第１図で
示された保持器２の斜視図である。まず初めに、本考案
の静電気バイパス構造を有する回転体装置の構成につい
て詳述する。FIG. 1 is a sectional view showing an embodiment of a rotating body device having an electrostatic bypass structure of the present invention. FIG. 2 is a perspective view of the contact sliding piece 1 shown in FIG. FIG. 3 is a perspective view of the cage 2 shown in FIG. First, the structure of the rotating body device having the electrostatic bypass structure of the present invention will be described in detail.
１は接触摺動片、２は保持器、３は磁気ディスク装置本
体、４はスピンドルモータ、５はプリント基板、６はプ
リント基板固定ネジ、７は突起部を示している。二点鎖
線は静電気バイパイ路を示している。接触摺動片１は炭
素粉体を加圧焼成したもので、比重が約1.7、抵抗が3M
Ω−cmであり、また硬度が約50°（ショア硬度）であ
る。保持器２は、炭素粉体をシリコン・コンパウンドで
成形したものであって、粘弾性特性をもっている。接触
摺動片１および保持器２は、ともに導電性である。Reference numeral 1 is a contact sliding piece, 2 is a holder, 3 is a magnetic disk device main body, 4 is a spindle motor, 5 is a printed circuit board, 6 is a printed circuit board fixing screw, and 7 is a protrusion. The chain double-dashed line indicates the electrostatic bypass path. The contact sliding piece 1 is made of carbon powder under pressure and has a specific gravity of about 1.7 and a resistance of 3M.
Ω-cm, and the hardness is about 50 ° (Shore hardness). The cage 2 is formed by molding carbon powder with a silicon compound and has a viscoelastic property. The contact sliding piece 1 and the cage 2 are both conductive.
接触摺動片１の一端部は拡大されており、その端面が磁
気ディスク装置本体３に配設された回転体たるスピンド
ルモータ４の回転中心の突起部７に接触せしめられてい
る。接触摺動片１の残部は筒状とされており、他端部が
保持器２の中央部に穿設された保持孔2aに係入されてい
る。保持器２の周面には嵌合用溝2bが穿設されており、
プリント基板５の所定の孔5aに嵌入されている。プリン
ト基板５は、またプリント基板固定ネジ６によって磁気
ディスク装置本体３に対し固着されている。One end of the contact sliding piece 1 is enlarged, and the end surface of the contact sliding piece 1 is brought into contact with the protrusion 7 of the rotation center of the spindle motor 4, which is a rotating body disposed in the magnetic disk device body 3. The remaining portion of the contact sliding piece 1 has a tubular shape, and the other end is engaged with a holding hole 2a formed in the center of the cage 2. A fitting groove 2b is formed on the peripheral surface of the cage 2,
The printed board 5 is fitted in a predetermined hole 5a. The printed circuit board 5 is fixed to the magnetic disk device body 3 by a printed circuit board fixing screw 6.
更に本考案の静電気バイパス構造を有する回転体装置の
作用について詳述する。Further, the operation of the rotating body device having the electrostatic bypass structure of the present invention will be described in detail.
スピンドルモータ４、突起部７、接触摺動片１、保持器
２、プリント基板５、プリント基板固定ネジ６および磁
気ディスク装置本体３の全てが導電性とされているた
め、二点鎖線で示すような静電気バイパス路が形成され
ている。従って回転体たるスピンドルモータ４に発生さ
れた静電気は、スピンドルモータ４、突起部７、接触摺
動片１、保持器２、プリント基板５、プリント基板固定
ネジ６および磁気ディスク装置本体３を包有する静電気
バイパス路を介して逃がされる。Since all of the spindle motor 4, the protrusion 7, the contact sliding piece 1, the retainer 2, the printed circuit board 5, the printed circuit board fixing screw 6 and the magnetic disk device body 3 are electrically conductive, as shown by the chain double-dashed line. A static electricity bypass path is formed. Therefore, the static electricity generated in the spindle motor 4, which is a rotating body, includes the spindle motor 4, the protrusion 7, the contact sliding piece 1, the holder 2, the printed board 5, the printed board fixing screw 6, and the magnetic disk device body 3. Escaped via static bypass.
［考案の効果］ 以上説明したように、本考案では電気導電性および粘弾
性特性を有し、接触摺動片の他端と嵌合した状態で接触
摺動片を保持する保持体を設けたため、この保持体自身
の粘弾性特性による高減衰率により回転体の共振現象を
防止することが可能である。すなわち、本考案では回転
体と接触摺動する部分の耐磨耗性を向上させ高寿命化を
達成でき、かつ共振音の発生を防止することが可能とな
る。[Advantages of the Invention] As described above, the present invention has the holding body that has the electrical conductivity and viscoelastic characteristics and holds the contact sliding piece in a state of being fitted to the other end of the contact sliding piece. It is possible to prevent the resonance phenomenon of the rotating body due to the high damping rate due to the viscoelastic property of the holding body itself. That is, in the present invention, it is possible to improve the wear resistance of the portion that comes into contact with and slides on the rotating body, achieve a longer life, and prevent the generation of resonance noise.
第１図は本考案の静電気バイパス構造を有する回転体装
置の一実施例を示す断面図、第２図は第１図で示された
接触摺動片１の斜視図、第３図は第１図で示された保持
器２の斜視図である。 1:接触摺動片 2:保持器 3:磁気ディスク装置本体 4:スピンドルモータ 5:プリント基板 6:プリント基板固定ネジ 7:突起部FIG. 1 is a sectional view showing an embodiment of a rotating body device having an electrostatic bypass structure of the present invention, FIG. 2 is a perspective view of the contact sliding piece 1 shown in FIG. 1, and FIG. It is a perspective view of the holder | retainer 2 shown by the figure. 1: Contact sliding piece 2: Cage 3: Magnetic disk unit body 4: Spindle motor 5: Printed circuit board 6: Printed circuit board fixing screw 7: Projection
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭59−95488（ＪＰ，Ｕ) 実開 昭58−94136（ＪＰ，Ｕ) 実開 昭58−173013（ＪＰ，Ｕ) 実開 昭58−193390（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References ACT 59-95488 (JP, U) ACT 58-94136 (JP, U) ACT 58-173013 (JP, U) ACT 58- 193390 (JP, U)
Claims (1)
に設けられた突起部と、 電気伝導性を有し、一端で前記回転体の前記突起部と接
触する接触摺動片と、 電気伝導性および粘弾性特性を有し、前記接触摺動片の
他端と嵌合した状態で該接触摺動片を保持する保持体と
を備えたことを特徴とする静電気バイパス構造を有する
回転体装置。1. A contact sliding piece having electrical conductivity and provided on a rotation center axis of a rotating body, and a contact sliding piece having electrical conductivity and contacting the protruding portion of the rotating body at one end. And a holding body having electric conductivity and viscoelastic characteristics and holding the contact sliding piece in a state of being fitted to the other end of the contact sliding piece. A rotating body device having.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986023765U JPH074795Y2 (en) | 1986-02-20 | 1986-02-20 | Rotating device having electrostatic bypass structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986023765U JPH074795Y2 (en) | 1986-02-20 | 1986-02-20 | Rotating device having electrostatic bypass structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62135405U JPS62135405U (en) | 1987-08-26 |
| JPH074795Y2 true JPH074795Y2 (en) | 1995-02-01 |
Family
ID=30822365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986023765U Expired - Lifetime JPH074795Y2 (en) | 1986-02-20 | 1986-02-20 | Rotating device having electrostatic bypass structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH074795Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3871862B2 (en) | 2000-07-26 | 2007-01-24 | 日本電気株式会社 | Removable disk device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5995488U (en) * | 1982-12-20 | 1984-06-28 | トキコ株式会社 | magnetic disk device |
-
1986
- 1986-02-20 JP JP1986023765U patent/JPH074795Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62135405U (en) | 1987-08-26 |
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