JPS5766505A - Cantilever pipe for pickup and its manufacture - Google Patents

Cantilever pipe for pickup and its manufacture

Info

Publication number
JPS5766505A
JPS5766505A JP17615280A JP17615280A JPS5766505A JP S5766505 A JPS5766505 A JP S5766505A JP 17615280 A JP17615280 A JP 17615280A JP 17615280 A JP17615280 A JP 17615280A JP S5766505 A JPS5766505 A JP S5766505A
Authority
JP
Japan
Prior art keywords
alumina layer
pipe
base material
terminal
stage
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.)
Pending
Application number
JP17615280A
Other languages
Japanese (ja)
Inventor
Michio Miura
Sunao Horiai
Mamoru Kajimura
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki Co Ltd
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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP17615280A priority Critical patent/JPS5766505A/en
Publication of JPS5766505A publication Critical patent/JPS5766505A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/44Styli, e.g. sapphire, diamond
    • G11B3/46Constructions or forms ; Dispositions or mountings, e.g. attachment of point to shank

Landscapes

  • Electrochemical Coating By Surface Reaction (AREA)

Abstract

PURPOSE:To obtain a cantilever pipe which has the fast rise of sound and improved acoustic characteristics, by increasing hardness, rigidity, elasticity, etc., by forming a crystalline alumina layer by performing the two-stage anode oxidationof the surface of an Al (alloy) base pipe; CONSTITUTION:One terminal 1a of an Al or Al-alloy pipe base material is sealed by being pressed and a hole 2 for stylus installation is made near the terminal. After this base material 1 is pretreated as required, the same anode oxidation with the ordinary formation of an ''Alumite '' film is performed to form an amorphous alumina layer. With current density high enough to cause plasma discharge on tne alumina layer surface, especially 10-50A/dm<2>, anode oxidation as the 2nd stage is performed in an electrolytic bath of weak acidm for example, 1.5-2.5M/l density Na2CO3, at 30-50 deg.C and for about 2-7min, thus forming an about 10mum crystalline alumina layer 3. Consequently, a cantilever pipe which has large strength, increased internal friction,and superior acoustic and mechanical characteristics is obtained.
JP17615280A 1980-12-13 1980-12-13 Cantilever pipe for pickup and its manufacture Pending JPS5766505A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17615280A JPS5766505A (en) 1980-12-13 1980-12-13 Cantilever pipe for pickup and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17615280A JPS5766505A (en) 1980-12-13 1980-12-13 Cantilever pipe for pickup and its manufacture

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP14136580A Division JPS5765098A (en) 1980-10-09 1980-10-09 Vibration diaphragm for acoustic transducer and its manufacture

Publications (1)

Publication Number Publication Date
JPS5766505A true JPS5766505A (en) 1982-04-22

Family

ID=16008564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17615280A Pending JPS5766505A (en) 1980-12-13 1980-12-13 Cantilever pipe for pickup and its manufacture

Country Status (1)

Country Link
JP (1) JPS5766505A (en)

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