JPH037302B2 - - Google Patents
Info
- Publication number
- JPH037302B2 JPH037302B2 JP7295484A JP7295484A JPH037302B2 JP H037302 B2 JPH037302 B2 JP H037302B2 JP 7295484 A JP7295484 A JP 7295484A JP 7295484 A JP7295484 A JP 7295484A JP H037302 B2 JPH037302 B2 JP H037302B2
- Authority
- JP
- Japan
- Prior art keywords
- handset
- front cover
- gap
- air chamber
- telephone
- 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.)
- Expired
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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Telephone Set Structure (AREA)
Description
【発明の詳細な説明】
〔技術分野〕
本発明は受話器並びに送話器を収納してなる電
話機用ハンドセツトに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a telephone handset that houses a receiver and a transmitter.
第１図は従来の電話機用ハンドセツトの断面図
である。
FIG. 1 is a cross-sectional view of a conventional telephone handset.
第１図において、１はハンドセツト、２はイヤ
ピース、３は受話器フロントカバ、４は小穴、５
は振動板、６はフレーム、７は小穴、１０はフレ
ーム６に設けられた連通管である。さらに８，
９，１１，１２は振動板５の前後に構成された空
気室であり、８は振動板５と受話器フロントカバ
３との間に形成される第１前気室、９は振動板５
とフレーム６との間に形成される第１後気室、１
１は受話器フロントカバ３とイヤピース２との間
に形成される第２前記室、１２はフレーム６の背
面とハンドセツト１との間に形成される第２後気
室である。これらの気室は音響振動系の自由度を
増して、高感度化と周波数特性の広帯域化を実現
する手段として用いられる。 In Figure 1, 1 is a handset, 2 is an earpiece, 3 is a front cover of the handset, 4 is a small hole, and 5 is a handset.
6 is a diaphragm, 6 is a frame, 7 is a small hole, and 10 is a communicating tube provided in the frame 6. 8 more,
9, 11, and 12 are air chambers configured before and after the diaphragm 5, 8 is a first front air chamber formed between the diaphragm 5 and the receiver front cover 3, and 9 is the diaphragm 5.
and a first rear air chamber formed between the frame 6 and the frame 6;
1 is a second air chamber formed between the handset front cover 3 and the earpiece 2; 12 is a second rear air chamber formed between the back of the frame 6 and the handset 1; These air chambers are used as a means to increase the degree of freedom of the acoustic vibration system and achieve higher sensitivity and wider frequency characteristics.
第２図は、第１図に実耳容積に相当するカツプ
ラを付加したときの構成を電気的な等価回路で示
したものである。この構成例の特徴は、連通管１
０を設け、かつ連通管１０の径および長さ寸法を
適当に設定することによつて、所望のカツトオフ
周波数1をもつたハイパスフイルタを構成できる
点にある。なお、図において、Ｆは駆動力、m0
は振動板等価質量、s0は振動板等価スチフネス、
m-1、r-1は小穴４の等価質量と等価抵抗、m-2、
r-2はイヤピース２の等価質量と等価抵抗m+、r+
は小穴７の等価質量と等価抵抗、s-1は第１前気
室８の等価スチフネス、s-2は第２前気室１１の
等価スチフネス、scはカツプラの等価スチフネス
s+1は第１後気室９の等価スチフネス、ml1、rl1は
連通管１０の等価質量と等価抵抗を示す。なお、
第２後気室１２の等価スチフネスは、振動板等価
スチフネスに対して十分小（すなわち第２後気室
の容積が大）となるように設定しているため、第
２図ではｓ＋２は零、すなわち短絡状態で表示さ
れる。第３図の実線は、連通管１０の設けたとき
の感度の周波数特性例で1以下の周波数で感度を
低減させることができる。一方点線は、連通管１
０を設けない場合の特性であつて、必要以上の低
周波数領域までの感度が平坦なためハム音などの
誘導雑音が聞こえることとなり、連通管１０を用
いて低周波数の感度を低減することは意味があ
る。 FIG. 2 shows an electrical equivalent circuit of the configuration when a coupler corresponding to the actual ear volume is added to FIG. 1. The feature of this configuration example is that the communication pipe 1
0 and by appropriately setting the diameter and length of the communicating tube 10, a high-pass filter having a desired cutoff frequency 1 can be constructed. In addition, in the figure, F is the driving force, m 0
is the equivalent mass of the diaphragm, s 0 is the equivalent stiffness of the diaphragm,
m -1 , r -1 are the equivalent mass and equivalent resistance of the small hole 4, m -2 ,
r -2 is the equivalent mass and equivalent resistance of earpiece 2 m + , r +
is the equivalent mass and equivalent resistance of the small hole 7, s -1 is the equivalent stiffness of the first front air chamber 8, s -2 is the equivalent stiffness of the second front air chamber 11, and s c is the equivalent stiffness of Katsupura.
s +1 represents the equivalent stiffness of the first rear air chamber 9, and m l1 and r l1 represent the equivalent mass and equivalent resistance of the communication pipe 10. In addition,
Since the equivalent stiffness of the second rear air chamber 12 is set to be sufficiently smaller than the equivalent stiffness of the diaphragm (that is, the volume of the second rear air chamber is large), s+2 is zero in FIG. In other words, it is displayed in a short-circuited state. The solid line in FIG. 3 is an example of the frequency characteristic of sensitivity when the communication tube 10 is provided, and the sensitivity can be reduced at a frequency of 1 or less. On the other hand, the dotted line is the communication pipe 1
This is a characteristic when 0 is not provided, and because the sensitivity is flat up to a lower frequency range than necessary, induction noise such as hum can be heard. It's meaningful.
しかし、この連通管１０を用いる構成では、振
動板５の外側に連通管１０を設けることが必要な
ため、受話器の外径寸法ならびに重量が大となる
欠点がある。第４図は、従来例の他の電話機用ハ
ンドセツトの断面図である。第４図において、第
１図と同一の番号は部品名を同じくしてその機能
も同様のものである。 However, in the configuration using this communication tube 10, since it is necessary to provide the communication tube 10 outside the diaphragm 5, there is a drawback that the outer diameter and weight of the receiver become large. FIG. 4 is a sectional view of another conventional telephone handset. In FIG. 4, the same numbers as in FIG. 1 have the same part names and their functions are the same.
第４図と第１図の相違点は、連通管１０の代り
にフロントカバー３の小穴を、小穴４−１と４−
２の２グループに分割して設け、かつ、ハンドセ
ツト１には受話器フロントカバ３と接合する部分
に突出部１−１を設けて、前記小穴４−１を突出
部１−１の内側に、小穴４−２を突出部１−１の
外側に配置したことである。 The difference between FIG. 4 and FIG. 1 is that small holes in the front cover 3 are used instead of the communicating pipe 10,
In addition, the handset 1 is provided with a protrusion 1-1 at the part that joins with the handset front cover 3, and the small hole 4-1 is inserted into the inner side of the protrusion 1-1. 4-2 is arranged outside the protrusion 1-1.
第５図は第４図の構成を電気的な等価回路で示
したもので、フロントカバ３の小穴の一方のグル
ープである外側の小穴４−２の寸法を調整するこ
とによつて、低周波数でのカツトオフ周波数1を
所望の値に設定し、感度の周波数特性を先の第３
図に示した実線のごとく実現できるようにしたも
のである。なお、ml2、rl2は小穴４−２の等価質
量と等価抵抗を示す。 FIG. 5 shows the configuration shown in FIG. 4 in an electrical equivalent circuit. By adjusting the dimensions of the outer small hole 4-2, which is one group of the small holes in the front cover 3, the low frequency Set cutoff frequency 1 to the desired value, and set the sensitivity frequency characteristic to the third
This can be achieved as shown by the solid line in the figure. Note that m l2 and r l2 represent the equivalent mass and equivalent resistance of the small hole 4-2.
しかし、第４図の構成において問題となるの
は、フロントカバ３とハンドセツト１の突出部１
−１との接合部に、受話器をハンドセツト１に取
りつけたとき、フロントガバ３に変形を生じない
で、かつ取付面に隙間を生じさせないことが重要
となることである。このことは量産製造を行う場
合、取付面各部の寸法公差を極めて厳重に管理す
る必要があり、コストの上昇はまぬがれない。 However, the problem with the configuration shown in FIG. 4 is that the front cover 3 and the protrusion 1 of the handset 1
When the handset is attached to the handset 1 at the joint with the front cover 3, it is important that the front cover 3 is not deformed and that no gaps are formed on the mounting surface. This means that when performing mass production, it is necessary to extremely strictly control the dimensional tolerances of each part of the mounting surface, which inevitably increases costs.
本発明は以上のような従来の欠点を除去するも
ので、電話伝送帯域外の低周波数領域での受話感
度を低減した電話機用ハンドセツトを提供するこ
とを目的とするものである。
The present invention eliminates the above-mentioned conventional drawbacks, and aims to provide a telephone handset with reduced receiving sensitivity in a low frequency region outside the telephone transmission band.
上記目的を達成するため、本発明はハンドセツ
トと受話器との取付接合面を受話器フロントカバ
の外縁部として、この外縁部に一定の間隙をもつ
ように構成したものである。
In order to achieve the above object, the present invention is configured such that the mounting joint surface between the handset and the receiver is the outer edge of the receiver front cover, and a certain gap is provided between the outer edge.
以下本発明の一実施例を図面により詳細に説明
する。
An embodiment of the present invention will be described in detail below with reference to the drawings.
第６図は本発明電話機用ハンドセツトの構成を
示す断面図で、１はハンドセツト、２はイヤピー
ス、３は受話器フロントカバ、４はフロントカバ
に設けられた小穴、５は振動板、６はバツクカ
バ、７はバツクカバ６に設けられた小穴である。
また、８，９，１１，１２は振動板５の前後に設
けられた空気室であり、本発明はこのハンドセツ
ト１と受話器のフロントカバ３の取付接合面に一
定の間隙２０を設けるようにしたものである。 FIG. 6 is a sectional view showing the structure of the telephone handset of the present invention, in which 1 is the handset, 2 is an earpiece, 3 is a front cover of the handset, 4 is a small hole provided in the front cover, 5 is a diaphragm, 6 is a back cover, 7 is a small hole provided in the back cover 6.
Further, 8, 9, 11, and 12 are air chambers provided before and after the diaphragm 5, and the present invention provides a certain gap 20 between the attachment surfaces of the handset 1 and the front cover 3 of the receiver. It is something.
第７図は、前記第６図の構成を電気的な等価回
路で示したものである。なお、ml3、rl3は間隙２
０の等価質量と等価抵抗を示す。すなわち、該間
隙２０を設けることによつて、第２前気室１１と
第２後気室１２は、該間隙２０の等価質量ml3と
等価抵抗rl3を介して音響的に接続される。これか
ら第３図に示した実線と感度周波数特性が実現さ
れることがわかる。 FIG. 7 shows an electrical equivalent circuit of the configuration shown in FIG. 6. In addition, m l3 and r l3 are the gaps 2
0 equivalent mass and equivalent resistance are shown. That is, by providing the gap 20, the second front air chamber 11 and the second rear air chamber 12 are acoustically connected through the equivalent mass m l3 and equivalent resistance r l3 of the gap 20. It can be seen from this that the solid line and sensitivity frequency characteristics shown in FIG. 3 are realized.
第８図〜第１０図に本発明による具体的な実施
例を示す。第８図はハンドセツト１の受話器外縁
部との接合面の凸起部に１個もしくは複数個の凹
部状の間隙２０を設け、この間隙２０の高さ、
幅、長さの各寸法を所望の特性が得られるように
設定したものである。このとき受話器フロントカ
バ３の外縁部は同一平面上にあればよい。 A specific embodiment according to the present invention is shown in FIGS. 8 to 10. FIG. 8 shows that one or more recess-shaped gaps 20 are provided in the protrusion of the joint surface of the handset 1 with the outer edge of the receiver, and the height of this gap 20 is
Each dimension of width and length is set so as to obtain desired characteristics. At this time, the outer edge of the handset front cover 3 only needs to be on the same plane.
第９図は、受話器フロントカバ３の外縁部に凹
部状の間隙２０を１個もしくは複数個設けて構成
したものである。このとき、ハンドセツト側の受
話器外縁部との接合面の凸起部は、平担でよい。 FIG. 9 shows a structure in which one or more recessed gaps 20 are provided at the outer edge of the handset front cover 3. At this time, the protrusion on the surface of the handset side that joins with the outer edge of the receiver may be flat.
第１０図はハンドセツト１と受話器外縁部の接
合面との間に挿置して所期の間隙を確保するため
のリング状部材を示したものである。この図にお
いて、２０は間隙寸法を凹部状に設けた場合を示
し、２０1は、完全に部材を切断した場合の間隙
を示している。すなわち、リング状部材を用いる
場合は、リングの一部を凸部状としてこれを１個
所もしくは複数個所設けるかあるいは、リングの
一部を完全に切断したものと組合せて、所期の受
話特性を実現することができる。 FIG. 10 shows a ring-shaped member that is inserted between the handset 1 and the joint surface of the outer edge of the receiver to ensure a desired gap. In this figure, 20 indicates the case where the gap size is provided in the shape of a recess, and 201 indicates the gap when the member is completely cut. In other words, when a ring-shaped member is used, a part of the ring is made into a convex shape and provided in one or more places, or a part of the ring is completely cut off to achieve the desired receiving characteristics. It can be realized.
第１１図に、本発明の手段によつて実現した受
話感度相対値の周波数特性を示す。図中点線は、
受話器とハンドセツト取付面に隙間を設けない従
来構成の特性を、実線は本発明による凹部間隙の
寸法を幅１cm、高さ1.5mm、奥行1.5mmとして該間
隙を１個所設けたときの特性である。これから、
本発明による構成法によれば、0.2KHz以下周波
数領域で受話感度を低減させることができる。 FIG. 11 shows the frequency characteristics of the relative reception sensitivity value realized by the means of the present invention. The dotted line in the figure is
The solid line shows the characteristics of the conventional structure in which no gap is provided between the receiver and the handset mounting surface, and the solid line shows the characteristics when the recess gap according to the present invention has dimensions of 1 cm in width, 1.5 mm in height, and 1.5 mm in depth, and that one gap is provided at one location. . from now,
According to the configuration method according to the present invention, it is possible to reduce reception sensitivity in a frequency range of 0.2 KHz or less.
以上説明したように、受話器外縁部と当該部に
接合するハンドセツト面とに一定の間隙部を設定
して、第２前気室と第２後気室とを音響的に接続
することによつて、所期の目標特性を実現でき
る。本発明による構成によれば、第１の従来例で
ある連通管を用いる方法を比べて振動板の外径寸
法を等しくとれば、受話器の外形寸法を大幅に小
形化できる効果がある。さらに第２の従来例であ
る受話器フロントカバの小穴を２分割して利用す
るものでは、ハンドセツトに受話器を取付ける場
合、受話器フロントカバとハンドセツト突出部と
が密接し、かつこのときフロントカバが受話器を
取付るとき印加力で変形しないように受話器各部
の高さ寸法ならびにハンドセツト突出部を含む各
部の高さ寸法を厳密に品質管理を行なうことが必
要で、量産製造上極めて不利である。この点に関
しても、本発明によれば受話器外縁部に部分的に
間隙を設ける構成であるため、ハンドセツトへの
取付時にはフロントカバへの押付力が加わらず、
このため、量産製造上寸法精度を上げるための品
質管理は、全く不用となる効果がある。
As explained above, by setting a certain gap between the outer edge of the handset and the handset surface that is joined to that area, and acoustically connecting the second front air chamber and the second rear air chamber. , the desired target characteristics can be achieved. According to the configuration of the present invention, compared to the first conventional method using a communication tube, if the outer diameter of the diaphragm is made equal, the outer dimensions of the receiver can be significantly reduced. Furthermore, in the second conventional example, in which the small hole in the front cover of the handset is divided into two parts, when the handset is attached to the handset, the front cover of the handset and the protrusion of the handset come into close contact with each other, and at this time, the front cover holds the handset. During installation, it is necessary to strictly control the quality of the height of each part of the handset and the height of each part, including the handset protrusion, so that it does not deform due to the applied force, which is extremely disadvantageous in terms of mass production. Regarding this point as well, according to the present invention, since a gap is provided partially at the outer edge of the handset, no pressing force is applied to the front cover when it is attached to the handset.
Therefore, there is an effect that quality control for increasing dimensional accuracy in mass production is completely unnecessary.
第１図ならびに第４図は従来例の電話機用ハン
ドセツトの断面図、第２図、第５図は夫々の電気
的等価回路図、第３図はその感度周波数特性曲
線、第６図は本発明電話機用ハンドセツトの構成
を示す断面図、第７図はその電気的等価回路図、
第８図は本発明によるハンドセツト側に間隙を設
けた斜視図、第９図は受話器外縁部に間隙を設け
た斜視図、第１０図はリング部材に間隙を設けた
斜視図、第１１図は、本発明による受話特性の測
定例を示す図である。
１……ハンドセツト、２……イヤピース、３…
…受話器フロントカバ、４……小穴、５……振動
板、６……フレーム、７……小穴、８……第１前
気室、９……第１後気室、１１……第２前気室、
１２……第２後気室。
1 and 4 are cross-sectional views of conventional telephone handsets, FIGS. 2 and 5 are respective electrical equivalent circuit diagrams, FIG. 3 is the sensitivity frequency characteristic curve thereof, and FIG. 6 is the present invention. A sectional view showing the configuration of a telephone handset, FIG. 7 is an electrical equivalent circuit diagram thereof,
FIG. 8 is a perspective view of the present invention with a gap provided on the handset side, FIG. 9 is a perspective view of the outer edge of the handset with a gap provided, FIG. 10 is a perspective view of the ring member with a gap provided, and FIG. FIG. 2 is a diagram showing an example of measuring reception characteristics according to the present invention. 1...Handset, 2...Earpiece, 3...
... Handset front cover, 4 ... Small hole, 5 ... Diaphragm, 6 ... Frame, 7 ... Small hole, 8 ... First front air chamber, 9 ... First rear air chamber, 11 ... Second front air chamber,
12...Second rear air chamber.
Claims (1)
接合面に所定の間隙を設け、該間隙を介して、前
記受話器とハンドセツトとの間に形成される第２
前気室と第２後気室とを連通し、音響的に接続さ
れるように前記受話器とハンドセツトとを接合し
て構成したものであることを特徴とする電話機用
ハンドセツト。 ２ 前記間隙は、前記取付接合面において、受話
器フロントカバ側もしくは、ハンドセツト側のい
づれか一方に凹部もしくは凸部を設けて形成した
ものであることを特徴とする特許請求の範囲第１
項記載の電話機用ハンドセツト。 ３ 前記間隙は、前記取付接合面において、受話
器フロントカバとハンドセツトとの間に、一部に
切欠きまたは溝を設けた薄板リング部材よりなる
スペーサを挿置して形成したものであることを特
徴とする特許請求の範囲第１項記載の電話機用ハ
ンドセツト。[Scope of Claims] 1. A predetermined gap is provided between the attachment surface of the handset front cover and the handset, and a second
1. A telephone handset characterized in that the telephone receiver and the handset are joined together so that a front air chamber and a second rear air chamber are communicated and acoustically connected. 2. The gap is formed by providing a concave portion or a convex portion on either the handset front cover side or the handset side of the mounting joint surface.
The telephone handset described in Section 1. 3. The gap is formed by inserting a spacer made of a thin plate ring member with a notch or groove in a part between the handset front cover and the handset on the mounting joint surface. A telephone handset according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7295484A JPS60217752A (en) | 1984-04-13 | 1984-04-13 | Handset for telephone set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7295484A JPS60217752A (en) | 1984-04-13 | 1984-04-13 | Handset for telephone set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60217752A JPS60217752A (en) | 1985-10-31 |
| JPH037302B2 true JPH037302B2 (en) | 1991-02-01 |
Family
ID=13504284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7295484A Granted JPS60217752A (en) | 1984-04-13 | 1984-04-13 | Handset for telephone set |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60217752A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK161288C (en) * | 1988-10-21 | 1991-12-02 | Alcatel Kirk As | Telephone instrument handset |
| KR100480052B1 (en) * | 2002-06-28 | 2005-03-30 | 엘지전자 주식회사 | Receiver unit of terminal device |
| JP2008167130A (en) * | 2006-12-28 | 2008-07-17 | Kenwood Corp | Mounting structure of microphone for radio equipment |
-
1984
- 1984-04-13 JP JP7295484A patent/JPS60217752A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60217752A (en) | 1985-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |