JPH07310774A - Electrode for variable damping fluid damper - Google Patents

Abstract

PURPOSE:To obtain an electrode which is of low voltage, thin, and light- weighted and has good mass-productivity while controlling the viscosity to vary the damping force. By forming an electrode layer on both sides of a base film by conductive ink, further forming an insulating layer on the surface thereof by insulating ink. CONSTITUTION:An electrode layer 2 7mum thick is formed on each of both surfaces of a base film 1 which is made by a polyester film and has a thickness of 125mum in total of two sheets by conductive ink, and an insulating layer 3 20mum thick is further formed on the surface by printing with insulating ink. A spacer 4 made by a polyester film 200mum thick is disposed to form a passage between both base films to manufacture an electrode. Accordingly, the thickness of the whole electrode is thin, 179mum. The electrode is inserted in a damper where nematic liquid crystal is enclosed, and when bipolar voltage of 50-300V is applied thereto, the viscosity is changed largely to vary the damping force. Furthermore, the current strength is 0.002mA and such a small current is enough.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、磁気ディスクまたは光
ディスク等の記憶装置、精密電子機器あるいは自動車等
のダンパ、および車載電子装置等の振動制御のためのダ
ンパーに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage device such as a magnetic disk or an optical disk, a damper for precision electronic equipment or an automobile, and a damper for controlling vibration of an on-vehicle electronic device.

【０００２】[0002]

【従来の技術】従来のダンパーとしては、オイルをゴム
状弾性体内に封入したもの、あるいは電気粘性流体（Ｅ
Ｒ流体：Ｅｌｅｃｔｒｏ−Ｒｈｅｏｌｏｇｉｃａｌ Ｆ
ｌｕｉｄ）、もしくは最新のものとして液晶を円筒内に
入れ電場を加え粘性を制御し減衰力を可変にする方式の
ものが特願平５−３０６０９４号として存する。2. Description of the Related Art As a conventional damper, a rubber-like elastic body filled with oil or an electrorheological fluid (E
R fluid: Electro-Rheological F
or Japanese Patent Application No. 5-306094, which is the latest one, in which a liquid crystal is put in a cylinder and an electric field is applied to control the viscosity to make the damping force variable.

【０００３】[0003]

【発明が解決しようとする課題】従来のオイル封入式に
あっては、粘性抵抗を可変することができないばかり
か、外気温度により粘度が変化し、特に高温に対し粘度
が低下する欠点を有している。In the conventional oil-filled type, not only the viscous resistance cannot be changed, but also the viscosity changes depending on the outside air temperature, and particularly the viscosity decreases at high temperatures. ing.

【０００４】従来の液晶またはＥＲ流体を使用したもの
にあって、粘性を変化させるためには、電極に高電圧を
与えるか、電極間を薄くして電圧を低下させるかしなけ
ればならない。In the conventional liquid crystal or ER fluid type, in order to change the viscosity, it is necessary to apply a high voltage to the electrodes or reduce the voltage by thinning the space between the electrodes.

【０００５】例えば、ネマティック液晶の場合、相対粘
度を９倍変化させるためには、１，０００〜３，０００
Ｖ／ｍｍの電圧を掛けねばならない。そのための高電圧
発生装置は、高価なものとなっている。For example, in the case of nematic liquid crystal, in order to change the relative viscosity 9 times, 1,000 to 3,000 is required.
A voltage of V / mm must be applied. The high voltage generator for that purpose is expensive.

【０００６】また電極間を薄くして行なおうとすると、
電極同士の接触により電気ショートのおそれが高く、そ
のため電極の剛性を増すために素材を金属とし、さらに
厚みを増す等して電気ショートの危険性を防止せねばな
らず、そのためにコストが高くなってしまう。When attempting to reduce the distance between the electrodes,
There is a high risk of electrical shorts due to contact between electrodes.Therefore, in order to increase the rigidity of the electrodes, the material must be metal and the thickness must be increased to prevent the risk of electrical shorts, which increases the cost. Will end up.

【０００７】[0007]

【課題を解決するための手段】そこで本発明は、液晶ま
たはＥＲ流体を用い、外部より電場を加えて液晶の配向
ベクトルの向きを制御し、あるいはＥＲ流体の流体中に
分散された粒子に誘電分極を起こし、粒子のクラスタを
形成し、粘性を制御して減衰力を可変する流体ダンパに
使用する電場を加える電極として、低電圧、うす型、軽
量、そして量産性の良い電極を可能とした。Therefore, the present invention uses a liquid crystal or an ER fluid and controls the orientation of the alignment vector of the liquid crystal by applying an electric field from the outside, or dielectric particles are dispersed in the fluid of the ER fluid. A low voltage, thin type, lightweight, and mass-producible electrode was made possible as an electrode that applies an electric field used in a fluid damper that causes polarization, forms clusters of particles, and controls viscosity to change damping force. .

【０００８】そのために、電極を絶縁インキで印刷、塗
装、ディッピング等によりコーティング、あるいは絶縁
フィルムを貼りつけることにより電気絶縁層を一層設け
るようにした。Therefore, the electrode is coated with an insulating ink, coated by painting, dipping or the like, or an insulating film is attached to form an electric insulating layer.

【０００９】[0009]

【実施例】次に図に示す実施例に従い本発明をより詳細
に説明する。The present invention will be described in more detail with reference to the embodiments shown in the drawings.

【００１０】２枚の厚さ１２５μｍのポリエステルフィ
ルムのベースフィルム１の両面に、導電インキにて厚さ
７μｍの電極層２をそれぞれ形成し、さらにその表面を
ポリエステル絶縁インキにて厚さ２０μｍに印刷して絶
縁層３を形成してあり、この両ベースフィルム間に流路
をつくるために厚さ２００μｍのポリエステルフィルム
のスペーサ４を配して電極を作製した。したがって全体
の電極の厚さは、１７９μｍと薄いものである。Electrode layers 7 having a thickness of 7 μm are respectively formed on both sides of a base film 1 of two 125 μm-thick polyester films with conductive ink, and the surfaces thereof are printed with a polyester insulating ink to a thickness of 20 μm. Then, the insulating layer 3 is formed, and in order to form a flow path between the both base films, a spacer 4 of a polyester film having a thickness of 200 μm is arranged to manufacture an electrode. Therefore, the thickness of the entire electrode is as small as 179 μm.

【００１１】この電極をネマティック液晶を封入したダ
ンパー内に挿入し、５０〜３００Ｖのバイポーラ電圧
（５０ＨＺサイン波）を与えたところ、粘性変化が大で
減衰力を可変できた。When this electrode was inserted into a damper in which nematic liquid crystal was sealed and a bipolar voltage (50 HZ sine wave) of 50 to 300 V was applied, the viscosity change was large and the damping force could be varied.

【００１２】そして電流強さは、絶縁層を設けてないも
のが０．０１ｍＡであったのに対し、本発明の絶縁層を
設けたものは０．００２ｍＡと少ない電流で足りた。The current strength was 0.01 mA when the insulating layer was not provided, whereas it was 0.002 mA when the insulating layer of the present invention was provided.

【００１３】[0013]

【発明の効果】本発明の電極構造であると、うすく、軽
量であり、そして量産性が良いので、コストの低いもの
が製作できた。EFFECT OF THE INVENTION The electrode structure of the present invention is thin and lightweight and has good mass productivity, so that a low cost product can be manufactured.

【００１４】さらにまた従来品に対し、電流が５分の１
以下で足り、消費電力も大幅に低減できる。Furthermore, the current is 1/5 of that of the conventional product.
The following is sufficient, and the power consumption can be significantly reduced.

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

【図１】部分断面図FIG. 1 is a partial sectional view

【符号の説明】[Explanation of symbols]

１ ベースフィルム ２ 電極層 ３ 絶縁層 ４ スペーサ 1 Base film 2 Electrode layer 3 Insulating layer 4 Spacer

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 電場を与えることにより粘性の変化する
液晶またはＥＲ流体等を使用するダンパ用電極におい
て、ベースフィルムの両面に導電インキにて電極層を、
その表面にさらに絶縁インキにて絶縁層を形成して成る
可変減衰性流体ダンパ用電極。1. In a damper electrode using liquid crystal or ER fluid whose viscosity changes by applying an electric field, electrode layers are formed on both sides of a base film with conductive ink.
An electrode for a variable damping fluid damper, in which an insulating layer is formed on the surface with insulating ink. 【請求項２】 絶縁層を、絶縁フィルムを貼りつけて形
成することを特徴とする請求項１記載の可変減衰性流体
ダンパ用電極。2. The variable damping fluid damper electrode according to claim 1, wherein the insulating layer is formed by adhering an insulating film.