JPS5548802A - Dynamic dump type tone arm - Google Patents

Dynamic dump type tone arm

Info

Publication number
JPS5548802A
JPS5548802A JP11909578A JP11909578A JPS5548802A JP S5548802 A JPS5548802 A JP S5548802A JP 11909578 A JP11909578 A JP 11909578A JP 11909578 A JP11909578 A JP 11909578A JP S5548802 A JPS5548802 A JP S5548802A
Authority
JP
Japan
Prior art keywords
tone arm
weight
magnetic alloy
rod spring
amorphous magnetic
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
JP11909578A
Other languages
Japanese (ja)
Inventor
Norio Goto
Kiyoshi Muramori
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.)
Hitachi Ltd
Proterial Ltd
Original Assignee
Hitachi Ltd
Hitachi Metals 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 Hitachi Ltd, Hitachi Metals Ltd filed Critical Hitachi Ltd
Priority to JP11909578A priority Critical patent/JPS5548802A/en
Publication of JPS5548802A publication Critical patent/JPS5548802A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable to control variably the absorption frequency of the dynamic absorber electrically with a simple construction, by constituting the arm with the elastic rod of amorphous magnetic alloy having greater Young modulus change by means of external magnetic field, weight and bias magnetic field application means to the elastic rod.
CONSTITUTION: One end of the rod spring 5 of amorphous magnetic alloy is supported with the tone arm constituent 1, the weight 3 is placed at another end, and the electromagnet 6 is supported with the tone arm construction 1 so that is can be close to the rod spring 5. They are located in the chamber 8, the damping oil 4 is filled in it to constitute the dynamic absorber 1' with the rod spring 5 of amorphous magnetic alloy, weight 3, and chamber 8 enclosing the electromagnet 6. Thus, the absorption frequency can variable be controlled by providing only a part of simple construction.
COPYRIGHT: (C)1980,JPO&Japio
JP11909578A 1978-09-29 1978-09-29 Dynamic dump type tone arm Pending JPS5548802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11909578A JPS5548802A (en) 1978-09-29 1978-09-29 Dynamic dump type tone arm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11909578A JPS5548802A (en) 1978-09-29 1978-09-29 Dynamic dump type tone arm

Publications (1)

Publication Number Publication Date
JPS5548802A true JPS5548802A (en) 1980-04-08

Family

ID=14752769

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11909578A Pending JPS5548802A (en) 1978-09-29 1978-09-29 Dynamic dump type tone arm

Country Status (1)

Country Link
JP (1) JPS5548802A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106486138A (en) * 2016-12-27 2017-03-08 合肥市菲凡音响有限责任公司 A kind of tone arm slow descending device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106486138A (en) * 2016-12-27 2017-03-08 合肥市菲凡音响有限责任公司 A kind of tone arm slow descending device

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