IT1245123B - Ricevitore telefonico con ridotte possibilita' di scariche elettrostatiche - Google Patents

Ricevitore telefonico con ridotte possibilita' di scariche elettrostatiche

Info

Publication number
IT1245123B
IT1245123B ITMI910232A ITMI910232A IT1245123B IT 1245123 B IT1245123 B IT 1245123B IT MI910232 A ITMI910232 A IT MI910232A IT MI910232 A ITMI910232 A IT MI910232A IT 1245123 B IT1245123 B IT 1245123B
Authority
IT
Italy
Prior art keywords
electrostatic discharge
telephone receiver
receiver
electrostatic discharges
reduced possibility
Prior art date
Application number
ITMI910232A
Other languages
English (en)
Inventor
Takuro Yamaguchi
Yoshinori Wada
Mark A Armstrong
Original Assignee
Mitel Corp
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 Mitel Corp filed Critical Mitel Corp
Publication of ITMI910232A0 publication Critical patent/ITMI910232A0/it
Publication of ITMI910232A1 publication Critical patent/ITMI910232A1/it
Application granted granted Critical
Publication of IT1245123B publication Critical patent/IT1245123B/it

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
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/10—Telephone receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Telephone Set Structure (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

Ricevitore avente in se una piastra vibratrice che vibra assieme ad una bobina di altoparlante il quale comprende una piastra di prevenzione di scarica elettrostatica avente un'apertura centrale disposta al di sopra della piastra vibratrice con un piccolo traferro previsto intermedio. Una copertura metallica attorno alla sommità ed ai lati del ricevitore è incassata nella plastica per inibire la scarica elettrostatica attraverso la copertura. Come risultato viene sostanzialmente aumentata la lunghezza di percorso della scarica attraverso l'aria, riducendo la possibilità di scarica elettrostatica dall'orecchio dell'utilizzatore.
ITMI910232A 1990-02-08 1991-01-31 Ricevitore telefonico con ridotte possibilita' di scariche elettrostatiche IT1245123B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990011759U JPH0733519Y2 (ja) 1990-02-08 1990-02-08 受話器

Publications (3)

Publication Number Publication Date
ITMI910232A0 ITMI910232A0 (it) 1991-01-31
ITMI910232A1 ITMI910232A1 (it) 1992-07-31
IT1245123B true IT1245123B (it) 1994-09-13

Family

ID=11786912

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI910232A IT1245123B (it) 1990-02-08 1991-01-31 Ricevitore telefonico con ridotte possibilita' di scariche elettrostatiche

Country Status (7)

Country Link
US (1) US5440630A (it)
JP (1) JPH0733519Y2 (it)
CA (1) CA2034898C (it)
DE (1) DE4103509C2 (it)
GB (1) GB2241628B (it)
IT (1) IT1245123B (it)
SE (1) SE9100278L (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2790421B2 (ja) * 1993-10-25 1998-08-27 スター精密株式会社 電気音響変換器及びその製造方法
US6078675A (en) * 1995-05-18 2000-06-20 Gn Netcom A/S Communication system for users of hearing aids
US6738483B1 (en) * 1999-10-12 2004-05-18 Sonic Systems, Inc. Overhead loudspeaker systems
WO2002005523A1 (en) * 2000-07-10 2002-01-17 Delong Chi Low-radiation receiver and mobile phone
US8340336B1 (en) * 2006-01-25 2012-12-25 At&T Mobility Ii Llc Magnetic coupling enhanced speaker assembly
JP5016376B2 (ja) * 2007-05-21 2012-09-05 中央紙器工業株式会社 二方差し段ボール製パレットの桁部材
JP2010278842A (ja) * 2009-05-29 2010-12-09 Kenwood Corp イヤホン
CN104168527B (zh) * 2014-08-26 2017-08-18 歌尔股份有限公司 微型扬声器
CN206341409U (zh) * 2016-12-12 2017-07-18 瑞声科技(新加坡)有限公司 发声单体

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1129537B (de) * 1960-11-14 1962-05-17 Krone Kg Elektrodynamischer Wandler der Fernmeldetechnik
DE1172729B (de) * 1963-06-28 1964-06-25 Heinrich Peiker Gegen Feuchtigkeit und Staub, insbesondere Eisenstaub, geschuetzter dynamischer Schallwandler
JPS6291046A (ja) * 1985-10-16 1987-04-25 Matsushita Electric Ind Co Ltd 静電気吸収形ハンドセツト
DE3538054C3 (de) * 1985-10-25 1997-01-23 Siemens Ag Innerhalb eines Handapparates eines Fernsprechgerätes angeordneter elektroakustischer Wandler
DE3617734A1 (de) * 1986-05-27 1987-12-03 Siemens Ag Vorrichtung zum schutz von elektrischen geraeten und der bedienungsperson bei hoher elektrostatischer aufladung der bedienungsperson
US4868876A (en) * 1986-05-27 1989-09-19 Siemens Aktiengesellschaft Electrostatic discharge protection device
DE3634619A1 (de) * 1986-10-10 1988-04-14 Siemens Ag Anordnung zum schutz vor spannungsueberschlaegen bei handapparaten der fernsprechtechnik
DE3634658A1 (de) * 1986-10-10 1988-04-14 Siemens Ag Anordnung zum schutz vor spannungsueberschlaegen bei handapparaten der fernsprechtechnik
DE3634620A1 (de) * 1986-10-10 1988-04-14 Siemens Ag Anordnung zum schutz vor spannungsueberschlaegen bei handapparaten der fernsprechtechnik
JPS63268400A (ja) * 1987-04-27 1988-11-07 Matsushita Electric Ind Co Ltd 動電型送・受話ユニツト
FR2629662B1 (fr) * 1988-04-01 1991-05-10 Horlogerie Photograph Fse Capsule electroacoustique a bobine rapportee
US5067151A (en) * 1988-06-30 1991-11-19 Nec Corporation Telephone handset with electrostatic discharge prevention
DE3902683C2 (de) * 1989-01-30 1996-09-05 Siemens Ag Fernsprechstation
DK164621C (da) * 1989-10-09 1992-12-07 Kirk Acoustics As Elektrodynamisk transducer

Also Published As

Publication number Publication date
DE4103509A1 (de) 1991-09-12
GB9102605D0 (en) 1991-03-27
SE9100278L (sv) 1991-08-09
JPH03103695U (it) 1991-10-28
ITMI910232A0 (it) 1991-01-31
GB2241628B (en) 1994-06-01
ITMI910232A1 (it) 1992-07-31
SE9100278D0 (sv) 1991-01-29
GB2241628A (en) 1991-09-04
DE4103509C2 (de) 1993-11-18
US5440630A (en) 1995-08-08
JPH0733519Y2 (ja) 1995-07-31
CA2034898C (en) 1995-04-18

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970131