Nonmagnetic spring parts

[Detailed Description of the Invention]

[Field of the Invention] The present invention relates to parts in nonmagnetic [ for the object for magnetic heads, or cassette tapes / suitable ].

[The technological background and problem of an invention] There was a place where the examination is insufficient in recent years about the parts of each product which the field of magnetic record is developing splendidly, or is used as a functional division since the development was rapid. Although sufficient spring nature and nonmagnetic are demanded as spring parts for suppressing a metaphor so that the core which laminates the thin board consisting of a nickel-Fe alloy may not be shifted, A [3 e-Cu alloy is expensive, and also what was formed with the conventional Be-Cu alloy was not enough in intensity, and when there was a process exposed to a back process at high temperature like Glass Bow Tyng, it had the fault of keeping he being poor. In order to use toxic Be necessarily Be, there was a health top problem. Although remarkable homogeneity was demanded of the To-Le prevention spring for videocassette tapes, in intensity, what was formed by the conventional stainless steel was not enough, and lacked also in homogeneity. In what satisfies the conditions of nonmagnetic, there were few 015 shuttlecocks which have sufficient spring nature generally used again, and it was not able to use them for the object for magnetic spatula 1~, or A j Let chee j.

Object 1 of [invention the Dark value which the present invention coped with such a point, was made, and has sufficient spring nature -- the object for magnetic beef fat with few R problems, or non-Traction for caret tapes -- parts -- offer Topple -- it aims at things.

Outline 1 of [invention That is, the nonmagnetic spring parts of the present invention also spread an N1~C[* alloy (-C Selection comes to form in Yo non-magnetic steel by the alloy in which 1 sort of Was done J It was added the two sort" A top 0.1~15% of the weight by the total quantity, or amorphous nonmagnetic alloy from Nb, AA, lower j, V, and Be). It is considered as the nonmagnetic steel which constitutes the main material of spring parts in the present invention, and is -C, There are fvjn -Cr-i\-1 system represented with Mn-0r system and 9%Mn-18%Cr-6%nickel-Fe represented with 18%Mn-5%Cr-f-e, an N1-Cr system represented with 16%Cr-14%Nr-Fe, etc. It is also using the nickel -Cr alloy which does not contain Fe, and is needed. Considering especially corrosion resistance, cost, and manufacturability, nickel-Cr system nonmagnetic steel is most industrially preferred. As a metal added to these main material, it is Nll. It is opened in AA, Ti, V, and Be grade. these amounts of addition -- the total quantity -- 0.1~15-fold phi% -- desirable -- 0.1 -- 1 -- it may be 10 % of the weight. AA and Ti have [ Nb or V ] a preferred enclosure from which Be will be 1 % of the weight or less 5% of the weight or less 10% of the weight or less. if the reason which limited the amount of addition in this way exceeds this range, processing, becoming very difficult, and Be with high toxicity will be based on the possible thing which it excels, and it reduces and supposes like [ thing ]. In the present invention, nonmagnetic spring parts are formed by amorphous nonmagnetic alloy, C is also good, and it is desirable to use it as a To-Le prevention spring for videocassette tapes especially in this case. The nonmagnetic spring parts of the present invention are manufactured as follows, for example. Rolling and after dissolving an alloy ingredient, performing hot working, carrying out solution treatment and giving forming processing, by heating by 400 degrees C~800 degreeC for 1~50 hours, age-hardening is carried out and ''C manufacture of is done.

Example Co of [invention next, it attaches [ it is alike and ] and explains to the example of the present invention. It rolled, after dissolving and carrying out hot working of the alloy shown in a table. Next, after performing solution treatment and performing cold work lightly, bending was performed and the core prevention spring of the type of Co of To go eta thickness 0.25IIi[was manufactured for age-hardening. Blanking was performed instead of bending, age-hardening was performed, and the reel prevention spring for video power Seth 1~tapes of thickness 0.15IN1N was manufactured. Thus, when it was alike in the manufactured core prevention and the core was stopped more, the gap of a core was as being shown in a table. Video power was as the defective fraction of the To-Le prevention spring for Teteb being shown in a table. the comparative example in front is the result of being alike in the reel prevention for video power ZETT tapes which consists of a core prevention spring which consists of the conventional 2%Be-Cu Money included, and an 18%Cr-11%nickel-FC alloy, and ranking next. Effect] of 'L invention * it explained above -- excelling and carrying out video power to a sex, if the gap of a core of parts is small in non-Magnetic 11 of the present invention for J: obtaining -- the To-Le prevention for Teteb -- also when it was used by carrying out, it is a defective fraction or the thing which was small excellent in homogeneity, and was. Since the nonmagnetic spring parts of the present invention satisfy enough the shuttlecock nature demanded in connection with the miniaturization of the future of a magnetic recording part article, and a weight saving, they will be greatly Rare(ed) to the small size of magnetic record products, and a weight saving. Representative patent attorney Kensuke Norichika (one others) Display Japanese Patent Application No. 57 of a written amendment (spontaneity) ■ incident No.-227218 The title of 2 inventions They are parts in nonmagnetic. Those who do 3 amendments Relation with an incident Patent Applicant (307) Tokyo Shibaura Electric Co., Ltd. Four generation To Reason Postcode100 The object of the 1-1-65, Uchisaiwai-cho, Chiyoda-ku, Tokyo \ amendment The contents of 6 and X amendment (1) Correct the claim of a statement with a specification of page [ 1st ] as an attached sheet. (2) l N i -Or alloy of the 3rd Chastity of the 11th line of a specification thru/or the 15th-line statement It is considered as the feature. " -- it revises in the following text. Account The feature To of [nickel chromium alloy, non-magnetic metal, or carrying out nonmagnetic amorphous Cautiously formation is carried out. ( (3) Insert the following text in the "most industrially desirable" next given in negative [ of a specification / 4th / of 4th line ]. Account [and such materials are effective also as a Flexi jar of the gimbal material of a floppy disk head, or Winche School type beef fat, in addition since it is required in nonmagnetic and high intensity also as shutter material of compact Frosobites, it is effective. cymbal material is maintenance material which has the shuttlecock nature for contacting beef fat to floppy disk Tisf, and is head maintenance material for Flexinya- to also keep a fixed interval for a head to a hard disk. [3rd-line given in the 5th page of" (4) specification -- it is hardened and manufactured. The following text is inserted in the next which is ". Account [and non-material are effective also as straw-man material to the head core formed with an F theta-A z-8i soft magnetism alloy, an amorphous alloy, and a wear-resistant good material like a ferrite. It is the material which has hardness with the Tammy material comparable as a core material, and when a head contacts a tape etc. by covering the core edge part on the head surface with this material, it is used in order to raise the abrasiveness of portions other than the core on the head surface. " Above "They are parts in claim magnetism. Beam and What IJ IJ Umu to Selection are parts in one sort of Was done, or two sorts. They are parts in nonmagnetic [ given in 1st Meridian of range 4 paragraph of the application for patent which is a reel prevention spring ].