JPS5233402A - Audio coupling device - Google Patents

Audio coupling device

Info

Publication number
JPS5233402A
JPS5233402A JP10959475A JP10959475A JPS5233402A JP S5233402 A JPS5233402 A JP S5233402A JP 10959475 A JP10959475 A JP 10959475A JP 10959475 A JP10959475 A JP 10959475A JP S5233402 A JPS5233402 A JP S5233402A
Authority
JP
Japan
Prior art keywords
coupling device
audio coupling
audio
ecoupling
couplign
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
JP10959475A
Other languages
Japanese (ja)
Inventor
Keiji Ogiwara
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.)
TOUYOU TSUUSHINKI KK
Toyo Communication Equipment Co Ltd
Original Assignee
TOUYOU TSUUSHINKI KK
Toyo Communication Equipment 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 TOUYOU TSUUSHINKI KK, Toyo Communication Equipment Co Ltd filed Critical TOUYOU TSUUSHINKI KK
Priority to JP10959475A priority Critical patent/JPS5233402A/en
Publication of JPS5233402A publication Critical patent/JPS5233402A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
    • H04M1/215—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers
    • H04M1/2155—Acoustic coupling

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)

Abstract

PURPOSE:An audio couplign device with superior packing effect and without tching sound can be obtained by remarkably reducing the coefficient of ction by coating th ecoupling surface with the transmitter and receiver of a phone with thin film having self-lubricating such as ethylene tetrafluoride.
JP10959475A 1975-09-10 1975-09-10 Audio coupling device Pending JPS5233402A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10959475A JPS5233402A (en) 1975-09-10 1975-09-10 Audio coupling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10959475A JPS5233402A (en) 1975-09-10 1975-09-10 Audio coupling device

Publications (1)

Publication Number Publication Date
JPS5233402A true JPS5233402A (en) 1977-03-14

Family

ID=14514213

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10959475A Pending JPS5233402A (en) 1975-09-10 1975-09-10 Audio coupling device

Country Status (1)

Country Link
JP (1) JPS5233402A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6214840U (en) * 1977-11-14 1987-01-29

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6214840U (en) * 1977-11-14 1987-01-29
JPS6336758Y2 (en) * 1977-11-14 1988-09-29

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