GB2357212A - Howling prevention structure for telephone with sliding cover - Google Patents

Howling prevention structure for telephone with sliding cover Download PDF

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Publication number
GB2357212A
GB2357212A GB0023589A GB0023589A GB2357212A GB 2357212 A GB2357212 A GB 2357212A GB 0023589 A GB0023589 A GB 0023589A GB 0023589 A GB0023589 A GB 0023589A GB 2357212 A GB2357212 A GB 2357212A
Authority
GB
United Kingdom
Prior art keywords
telephone
microphone
opening
voice transmission
slide part
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.)
Withdrawn
Application number
GB0023589A
Other versions
GB0023589D0 (en
Inventor
Takashi Oosato
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB0023589D0 publication Critical patent/GB0023589D0/en
Publication of GB2357212A publication Critical patent/GB2357212A/en
Withdrawn legal-status Critical Current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
    • H04M1/20—Arrangements for preventing acoustic feed-back
    • 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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0235—Slidable or telescopic telephones, i.e. with a relative translation movement of the body parts; Telephones using a combination of translation and other relative motions of the body parts
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Telephone Function (AREA)

Abstract

A structure preventing acoustic feedback for a telephone handset comprising a slide part 15, a microphone 13, a microphone-side opening 19, a body-side rib 18, a voice transmission opening 16, and a slide-side rib 17. The slide part 15 is provided the front part of the body 14 of the telephone. The microphone is provided inside the front face of the body 14 of the telephone. The microphone-side opening 19 is formed in the front face of the body 14 as to provide communication between the microphone 13 and the exterior of the body 14. The body side rib 18 is provided on the body 14 of the handset and formed around the microphone-side opening 19. The voice transmission opening 16 is formed in the slide part 15. The slide-side rib 17 is formed in the back face of the slide part 15 around the voice transmission opening. A second voice transmission opening and slide-side rib can be provided so a user can use the handset with the slide part 15 in either an open or closed state.

Description

2357212 HOWLING PREVENTION STRUC= FOR TELEPHONE The present invention
relates to a howling prevention structure for telephone, and more particularly to the howling prevention structure in the telephone provided with a slide part which is slidable along a front face of a body of the telephone.
In a portable cellular phone, a loudspeaker section and a microphone section are arranged close to each other for a miniaturization of a case body and accordingly, a talker's mouth is apart away from the microphone section. For this reason, it has been necessary to increase sensitivity of the microphone so as to take a sound in. This facilitates the microphone to catch a sound from the loudspeaker, and a howling rnay happen in some cases. In order to prevent such howling, for a. telephone disclosed in Japanese Publication'No. JP-A- 7-283861 of an unexamined Patent Application, for example, there are provided voice vibration absorbing layers in an intermediate area between the loudspeaker section and the microphone section and around the microphone section in a handset thereby to prevent the voices received through the loudspeaker section from entering into the microphone section through a space in the handset.
Meanwhile, there has been another type of conventional portable cellular phone in which a slide part 1 is provided in a front part of a body of the telephone as shown in Fig. 3 to prevent an erroneous operation and to protect a keyboard and the like.
However, in the conventional telephone provided with the slide part in the front part of the body of the telephone, it has been a problem that a gap is created around an opening for the microphone in the f ront part of the body of the telephone and an opening in the slide part, and the received voice enters through the gap causing an inconvenience such as a howling or the like.
It is an.obj.ect of the invention to solve the above described problem in the prior art and to prevent the howling which occurs in the event that the received voice enters through the gap in the slide part provided in the f rant part of the body of the telephone.
in order to solve the above described problem, according to the invention, a howling prevention structure for a telephone is so constructed that the structure comprises: a slide part provided in a front part of a body of the telephone; a microphone. provided inside a front face of the body of the telephone; an opening for a microphone, the opening being formed in the front face of the body of the telephone so as to communicate a sound receiving face of the microphone with the 2 exterior; a rib on the telephone, the rib being formed around the opening of the microphone; a first opening for voice transmission formed in the slide part at a position where it communicates with the opening when the slide part is in an open state with respect to the body of the telephone; a first slide-side rib formed in a back face of the slide part around the first opening for voice transmission; a second opening for voice transmission formed in the slide part at a position where it communicates with the opening for microphone when the slide part is in a closed state with respect to the body of the telephone; and a second slide-side rib formed in the back face of the slide part around the second opening for voice transmission.
By constructing the structure in this manner,. a passage of the sound from the loudspeaker to the microphone can be blocked by the ribs, whereby the howling can be prevented.
A particular embodiment in accordance with this invention will now be described with reference to the accompanying drawings; in which:- Fig. 1 is a. perspective view of an outer appearance of a telephone in an embodiment according to the invention; Fig. 2 is a sectional view of the telephone set in the embodiment according to the invention; and Fig. 3 is a sectional view of a conventional telephone set.
3 Now, a mode for carrying out the invention will be described in detail referring to Figs. 1 and 2.
The mode for carrying out the invention is embodied by a howling prevention structure for a telephone in which a rib is formed around a opening for a microphone in the body of the telephone, and ribs are formed on a back face of a slide part around openings for voice transmission provided at positions where the voice transmission openings communicate with the opening for the microphone in an open and closed states of the slide part.
Fig. 1 is a view of an outer appearance of. a telephone.
in an embodiment according to the invention. Fig. 2 is a sectional view taken along a line A-A of Fig. 1 showing a closed state of a slide part. In Figs. 1.and 2, a keyboard 10 includes a keyboard for inputting a telephone number or the like. A displaypart 11.includes.a liquid crystal display for indicating.
anessage and the like. A loudspeaker 12 includes a loudspeaker provided on an upper end portion of a body 14 of the telephone and adapted to output a transmitted voice. A microphone 13 includes a microphone incorporated in a lower end portion of the body 14 of the telephone for inputting a transmitting voice.
A slide part 15 includes a sliding cover which is slidably attached to a front face of the body 14 of the telephone and covers the keyboard and the like for protecting them from an erroneous operation or a breakage. In a front face of the slide part 15 are formed openings 16a and 16b for voice 4 transmission which serve as mouth pieces, and on a back face of the slide part 15 are formed ribs 17a and 17b around the openings 16a and 16b, respectively. A rib 18 is also formed around an opening 19 for microphone on the body 14 of the telephone.
Now, an operation of the telephone in the embodiment according to. the invention having the structure as described above will be explained. As shown in.Fig. 1, the body 14 of the telephone is provided with the microphone 13 inside the front face thereof. In the front face of the slide part 15 are formed the two openings 16a and 16b. As shown in Fig. 2, there is formed an opening 19 for microphone which communicates a.
sound receiving face of the microphone 13 with the exterior.
The rib 18 of the microphone section is formed on the front face of the.body 14 of the telephone around the opening 19 for the microphone. The slide-part ribs 17a and 17b are formed on the back face of the slide part 15 around the openings 16a and 16b, respectively. The opening 19 for the microphone and the rib 18 of the microphone section in the body 14 of the telephone are positioned in such a manner that they communicate with the openings 16a and 16b for voice transmission and the slide part ribs 17a and 17b in the slide part 15 when the slide part 15 is in an open state or in a closed state with respect to the body 14 of the telephone. The opening 16a which communicates with the opening 19 for the microphone when the slide part 15 is in the open state is designed to have a wider area than the opening 19. The opening 19 provided in the front face of the body 14 of the telephone is inclined toward a lower bottom face of the body 14 of the telephone.
When a user talks facing with the opening 16b in the slide part 15 in the closed state of the slide part 15 as shown in Fig. 2, his voice is transmitted to the microphone 13 through the opening 19 for the microphone. On this occasion, the sound from the loudspeaker 12 is blocked by the slide-part ribs 17b and the rib 18 of the microphone section, and will not directly enter. into the microphone 13. As the result, there will be no howling occurred, and a good telephone conversation can be made.
Because the opening 16a, which communicates with the opening 19 in the open state- of the slide part 15, is made wider than the opening 19 for the microphone and the opening 19 for the microphone is inclined downward, the talkerr S voice can - be effectively caught while preventing a passage of the sound from the.loudspeaker.
As described above, in the embodiment according to the invention, the howling prevention structure for a telephone is constituted by forming the rib around an opening for a microphone in the body of the telephone, and by f orming the ribs around the openings for voice transmission which are provided on the back face of the slide part at the positions where they communicate with the opening for the microphone in the open and closed states of the slide part. Therefore, the passage of the sound from the loudspeaker to the microphone can be blocked and 6 the howling can be prevented.
In the above embodiment, two openings for voice transmission are provided at positions where they communicate with the opening for the microphone in the open and closed states of the slide part. However, it is also preferable that only one opening for voice transmission is provided and communicated with the opening for the microphone in one of an open and closed states of the slide part.
Further, it is also pref erable that an opening for voice transmission is provided at positions where they communicate with the opening for the microphone in condition that.the slide part partially covers the keyboard and the like on the body of the telephone. In this case, an engaging portion may be.
provided on the slide part in order to enable the slide portion to slide with respect to the body of the telephone in steps.
As apparent. from the foregoing description, according to the invention, the howling prevention structure in the telephone is so constructed that the structure comprises.. the slide part provided in the front part of the body of the telephone; the microphone provided inside the front face of the body of the telephone; the opening for the microphone formed Jin the front face of the body of the telephone so as to communicate the sound receiving f' ace of the microphone with the exterior; the rib on the body of the telephone formed around the opening for the microphone, the.first opening for voice transmission formed in the slide part at the position where it 7 communicates with the opening for microphone when the slide part is in the open state with respect to the body of the telephone; the first slide-side rib formed in the back face of the slide part around the f irst opening for voice transmission; the second opening for voice transmission formed in the slide part at the position where it communicates with the opening for the.
microphone when the slide part is in the closed state with respect to the body of the telephone; and the second slide side rib formed in the back face of the slide part around the second opening for voice transmission. Therefore, such an ef f ect can be obtained that the howling caused by the space which is created between the slide part and the body of the telephone can be eliminated..

Claims (8)

  1. A howling prevention structure for. a telephone comprising:
    a slide part provided in a front part of a body of the telephone; a microphone provided inside a front face of the body of the telephone; a microphone-side opening formed in the front face of the body of the telephone so as to communicate a sound receiving face of said microphone with the exterior of the body; a body-side rib on the body of the telephone, said body-side rib being forraed around said microphone-side opening; a first voice transmission opening for voice transmission, said first voice transmission opening being formed in said slide part; and a first slide-side rib formed in a back face of said slide part around said first voice transmission opening.
  2. 2. The howling prevention structure according to claim 1, wherein said microphone-side opening is inclined toward a lower bottom face of the body of the telephone.
  3. 3. The howling prevention structure according to claim 1 or 2 wherein said first voice transmission opening has a wider area than said microphone-side opening.
    9
  4. 4. The howling prevention structure according to any one of the preceding claims, wherein said first voice transmission opening is formed at a position where it communicates with said microphone-side opening when said slide part is in an open state with respect to the body of the telephone.
  5. 5. The howling prevention structure according to claim 1, 2 or 3, wherein said first voice transmission opening is formed at a position where it communicates with said microphone-side opening when said slide part is in a closed state with respect to the body of the telephone.
  6. 6. The howling prevention structure according to any one of the preceding claims, further comprising:
    a second voice transmission opening for voice transmission, said second voice transmission opening being formed in said slide part; and a second slide-side rib formed in a back face of said slide part around said second voice transmission opening, wherein said first and second voice transmission openings are arranged in parallel with each other.
  7. 7. The howling prevention structure according to claim 6, wherein said first voice transmission opening is formed at a position where it communicates with said microphone-side opening when said slide part is in an open state with respect to the body of the telephone, and wherein said second voice transmission opening is forined at a position where it communicates with said microphone-side opening when said slide part is in a closed state with respect to the body of the telephone.
  8. 8. A howling prevention structure for a telephone substantially as described with reference to Figures 1 or 2 of the accompanying drawings.
    11
GB0023589A 1999-09-28 2000-09-26 Howling prevention structure for telephone with sliding cover Withdrawn GB2357212A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27432899A JP2001103146A (en) 1999-09-28 1999-09-28 Howling prevention device for telephone set

Publications (2)

Publication Number Publication Date
GB0023589D0 GB0023589D0 (en) 2000-11-08
GB2357212A true GB2357212A (en) 2001-06-13

Family

ID=17540135

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0023589A Withdrawn GB2357212A (en) 1999-09-28 2000-09-26 Howling prevention structure for telephone with sliding cover

Country Status (3)

Country Link
JP (1) JP2001103146A (en)
CN (1) CN1290099A (en)
GB (1) GB2357212A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9124348B2 (en) 2011-03-17 2015-09-01 Panasonic Intellectual Property Management Co., Ltd. Mobile terminal having a microphone sound hole and speaker sound hole disposed on the same plane
US9319498B2 (en) 2012-10-16 2016-04-19 Kyocera Corporation Portable electronic device
US10671129B2 (en) 2016-01-22 2020-06-02 Kyocera Corporation Electronic device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101305639A (en) * 2005-11-25 2008-11-12 三菱电机株式会社 Portable terminal
JP5496726B2 (en) * 2010-03-24 2014-05-21 京セラ株式会社 Sliding mobile electronic device
CN104602143B (en) * 2015-02-05 2019-04-16 深圳市创世达实业有限公司 Anti- squeal-preventive device and the microphone for using the device
US11191528B2 (en) * 2015-07-09 2021-12-07 DePuy Synthes Products, Inc. External hand control for surgical power tool

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999012322A1 (en) * 1997-09-04 1999-03-11 Ericsson Inc. Radiotelephone with sliding acoustic member
GB2349292A (en) * 1999-04-23 2000-10-25 Matsushita Electric Ind Co Ltd Portable radio device with sliding cover

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999012322A1 (en) * 1997-09-04 1999-03-11 Ericsson Inc. Radiotelephone with sliding acoustic member
GB2349292A (en) * 1999-04-23 2000-10-25 Matsushita Electric Ind Co Ltd Portable radio device with sliding cover

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9124348B2 (en) 2011-03-17 2015-09-01 Panasonic Intellectual Property Management Co., Ltd. Mobile terminal having a microphone sound hole and speaker sound hole disposed on the same plane
US9319498B2 (en) 2012-10-16 2016-04-19 Kyocera Corporation Portable electronic device
US10671129B2 (en) 2016-01-22 2020-06-02 Kyocera Corporation Electronic device

Also Published As

Publication number Publication date
GB0023589D0 (en) 2000-11-08
JP2001103146A (en) 2001-04-13
CN1290099A (en) 2001-04-04

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)