JPS643247Y2

JPS643247Y2 -

Info

Publication number: JPS643247Y2
Application number: JP14953483U
Authority: JP
Priority date: 1983-09-29
Filing date: 1983-09-29
Publication date: 1989-01-27
Also published as: JPS6059660U

Description

【考案の詳細な説明】本考案はさきに本考案者が考案した電話機の切
換回路（電話機がどの回線に接続されても通路電
流を継電器に通さずに供給し、通話感度の向上を
図つた回路）の改良に関するものである。[Detailed description of the invention] This invention was first introduced by the inventor of the present invention, which developed a switching circuit for telephones (no matter which line the telephone is connected to, the current is supplied without passing through a relay, thereby improving call sensitivity. This relates to the improvement of circuits.

従来電話機回路中に使用している自己保持形継
電器は起動時に自己接点の開放によるバイブレー
シヨンを起こす欠点があつた。 Self-holding relays conventionally used in telephone circuits have had the disadvantage of causing vibration due to the opening of the self-contact at startup.

本考案は前記の欠点を除去するため、自己保持
形継電器のブレーク接点と並列に比較的小さい容
量のコンデンサを入れることによつて、自己保持
形継電器の動作遅れを生じさせないようにしたも
のである。 In order to eliminate the above-mentioned drawbacks, the present invention prevents the delay in operation of the self-holding relay by inserting a capacitor of relatively small capacity in parallel with the break contact of the self-holding relay. .

以下、図面により本考案を詳細に説明する。 Hereinafter, the present invention will be explained in detail with reference to the drawings.

電話機、特に都市高速道路等に設置される非常
電話機には各々１台の電話機に対し常用および予
備の２回線が連接接続されている。連接接続され
た電話機がすでに通話中の場合は、他の電話機は
予備回線を使用して非常通話を行う方式を取り入
れたシステムがある。 Telephones, especially emergency telephones installed on urban expressways, have two lines, one for regular use and one for backup, connected to each telephone. Some systems incorporate a method in which if a connected telephone is already busy, other telephones use a backup line to make an emergency call.

第１図はさきに考案した電話機の回線切換回路
図であつて、Ａは自己保持形継電器（以下継電器
という）である有極継電器であり、a⁰，a¹，a²，
a³がその接点である。特にa²，a³はアーリ・メー
ク接点である。電話機TEL１〜TELNは電話回
線に連接接続されている。１，２は常用回線、
３，４は予備回線であり、その極性が通常では回
線２，４が正（＋）、回線１，３が負（−）であ
る。 Fig. 1 is a line switching circuit diagram of the telephone that I devised earlier, in which A is a self-holding relay (hereinafter referred to as a relay), which is a polarized relay, and a ⁰ , a ¹ , a ² ,
a ³ is the contact point. In particular, a ² and a ³ are early make contacts. Telephones TEL1 to TELN are connected to a telephone line. 1 and 2 are regular lines,
3 and 4 are protection lines, and their polarities are normally positive (+) for lines 2 and 4 and negative (-) for lines 1 and 3.

今、第１図のコンデンサC₁がないと仮定する。
電話機の操作者が電話機TEL１の送受話器を上
げると、第１図のフツクスイツチHSが動作し、
回線４（＋）−接点a³−接点a⁰−継電器Ａ−通話
回路TC−フツクスイツチHS−接点a²−回線３
（−）なるループにより継電器Ａは起動される。
しかし継電器Ａの接点a⁰が動作し終わらないうち
に継電器Ａは自己の前記接点a⁰が動作し始めるこ
とにより、前記のループが切断され不動作とな
る。よつて接点a⁰が元にもどり再び前記のループ
ができるので、継電器Ａの接点のバイブレーシヨ
ンが起こることになる。 Now assume that capacitor C ₁ in FIG. 1 is not present.
When the telephone operator lifts the handset of telephone TEL1, the switch HS shown in Fig. 1 operates.
Line 4 (+) - Contact a ³ - Contact a ⁰ - Relay A - Talk circuit TC - Hook switch HS - Contact a ² - Line 3
Relay A is activated by the (-) loop.
However, before the contact a ⁰ of the relay A has finished operating, the contact a ⁰ of the relay A starts operating, so that the loop is cut and the relay becomes inoperative. As a result, the contact point ^a0 returns to its original state and the above-mentioned loop is formed again, causing vibration of the contact point of relay A.

この継電器Ａのバイブレーシヨンを防ぐため、
さきに考案した電話機の回線切換回路では、第１
図に示すように、大容量のコンデンサC₁を継電
器Ａと並列に挿入している。電話機TEL１の送
受話器を上げることによつて前記のループにより
継電器Ａが起動される。継電器Ａの接点a⁰が動作
し始めると同時に、大容量のコンデンサC₁が放
電し始め、コンデンサC₁とループを構成してい
る継電器Ａに放電電流を流し、接点a⁰，a¹，a²，
a³が切り換わるまで継電器Ａを動作し続けさせ
る。接点が切り換わると継電器Ａは自己保持形で
ある有極継電器であるので、逆電流が流れるまで
自己保持を継続する。ここで電話機TEL１は、
回線２（＋）−接点a³−接点a⁰−ダイオードD₁−
通話回路TC−フツクスイツチHS−接点a²−回線
１（−）のループで連絡先とのループが構成され
通話が可能となる。 In order to prevent this relay A from vibrating,
In the telephone line switching circuit that we devised earlier, the first
As shown in the figure, a large capacity capacitor _C1 is inserted in parallel with relay A. By lifting the handset of telephone TEL1, relay A is activated by the loop described above. At the same time that contact a ⁰ of relay A begins to operate, large-capacity capacitor C ₁ begins to discharge, causing a discharge current to flow through relay A, which forms a loop with capacitor C ₁ , and contacts a ⁰ , a ¹ , a ² ,
a Continue to operate relay A until ³ switches. When the contacts are switched, since relay A is a self-holding type polarized relay, it continues to hold itself until a reverse current flows. Here, the telephone TEL1 is
Line 2 (+) - Contact a ³ - Contact a ⁰ - Diode D ₁ -
A loop with the contact point is formed by the loop of the call circuit TC, the hook switch HS, the contact a ² and the line 1 (-), and a call can be made.

常用回線１，２が使用されると、連絡先にある
交換機（図示しない）により、予備回線の極性が
反転して、回線４（−）、回線３（＋）となる。 When regular lines 1 and 2 are used, the polarity of the protection lines is reversed by an exchange (not shown) at the contact point, and becomes line 4 (-) and line 3 (+).

常用回線を使用している以外の電話機TEL２
から通報先を呼出すため、送受話器を上げるとフ
ツクスイツチHSが動作するが、継電器Ａは動作
せず、回線３（＋）−接点a²−フツクスイツチHS
−通話回路TC−ダイオードD₂−接点a³−回線４
（−）のループができる。よつて常用回線が使用
中であつても、予備回線を使用して連絡先との通
話が可能である。 Telephone TEL2 other than those using regular lines
When you lift the handset to call the destination, the hook switch HS operates, but relay A does not operate, and the line 3 (+) - contact a ² - hook switch HS
−Talking circuit TC−Diode D ₂ −Contact a ³ −Line 4
A (-) loop is created. Therefore, even if the regular line is in use, it is possible to talk to a contact using the protection line.

常用回線を使用している電話機が通話を終了し
送受話器を下ろすと、フツクスイツチが戻ること
により、回線２（＋）−接点a³−接点a⁰−ダイオ
ードD₁−継電器Ａ−接点a¹−フツクスイツチHS
−接点a²−回線１（−）のループで電流が流れ
る。よつて継電器Ａの自己保持は解かれて継電器
Ａの接点は元に戻り電話機は待機状態にもどる。 When the telephone that is using the regular line ends the call and hangs up the handset, the hook switch returns, and the line 2 (+) - contact a ³ - contact a ⁰ - diode D ₁ - relay A - contact a ¹ - Futsuku Switch HS
- Contact a ² - Current flows in the loop of line 1 (-). Therefore, the self-holding of relay A is released, and the contacts of relay A return to their original state, and the telephone returns to the standby state.

しかし第１図の回路ではコンデンサC₁が継電
器Ａと並列に挿入されているので、電話機の操作
者が送受話器を上げた時、フツクスイツチHSが
動作しても、継電器Ａと並列に接続されている大
容量のコンデンサC₁にまず充電電流が流れ、次
に継電器Ａを動作させるため継電器Ａの動作はコ
ンデンサC₁の充電時間だけ遅れる。コンデンサ
C₁は大容量のためこの充電時間の遅れは無視で
きない。 However, in the circuit shown in Figure 1, capacitor _C1 is inserted in parallel with relay A, so when the telephone operator picks up the handset, even if the switch HS operates, it will not be connected in parallel with relay A. Charging current first flows through the large capacity capacitor _C1 , and then relay A is operated, so the operation of relay A is delayed by the charging time of capacitor _C1 . capacitor
Since C ₁ has a large capacity, this delay in charging time cannot be ignored.

以下に本考案の一実施例を図面を参照しながら
説明する。 An embodiment of the present invention will be described below with reference to the drawings.

第２図は本考案による電話機の回線切換回路の
一実施例図であつて、コンデンサC₂は自己保持
形継電器Ａの接点a⁰と並列に接続したものであ
る。電話機の操作者が送受話器を上げることによ
り、回線４（＋）−接点a³−接点a⁰−継電器Ａ−
通話回路TC−フツクスイツチHS−接点a²−回線
３（−）のループで継電器Ａを起動する。接点a⁰
がそのブレーク接点を離れると、継電器Ａには接
点a²，a³がアーリ・メーク接点のため、回線４
（＋）−接点a³−コンデンサC₂−継電器Ａ−通話回
路TC−フツクスイツチHS−接点a²−回線３
（−）により、コンデンサC₂の充電電流が流れ、
接点a⁰が切り換わるまで継電器Ａは動作維持され
る。接点の切換動作が完了すると、回線２（＋）
−接点a³−接点a⁰−ダイオードD₃−通話回路TC
−フツクスイツチHS−接点a²−回線１（−）の
ループで通路電流が流れ、電話機の操作者は連絡
先と通話が可能となる。なお実際の回路ではダイ
オードと抵抗を並列接続したものをコンデンサ
C₂と直列に挿入していて、充電時はダイオード
ですばやく充電するようにし、接点a⁰がダイオー
ドD₃側に切り換わつた放電時は前記抵抗でもつ
て、継電器Ａに継電器Ａぎ復旧するような大きな
電流が流れないよう、ゆつくり放電するようにし
てある。 FIG. 2 is a diagram showing an embodiment of a telephone line switching circuit according to the present invention, in which a capacitor _C2 is connected in parallel with a contact ^a0 of a self-holding relay A. When the telephone operator lifts the handset, line 4 (+) - contact a ³ - contact a ⁰ - relay A -
Activate relay A with the loop of communication circuit TC - hook switch HS - contact a ² - line 3 (-). contact a ⁰
When relay A leaves its break contact, relay A has contacts a ² and a ³ as early make contacts, so line 4
(+) - Contact a ³ - Capacitor C ₂ - Relay A - Talking circuit TC - Hook switch HS - Contact a ² - Line 3
(−) causes the charging current of capacitor C ₂ to flow,
Relay A remains operational until contact a ⁰ switches. When the contact switching operation is completed, line 2 (+)
-Contact a ³ -Contact a ⁰ -Diode D ₃ -Talking circuit TC
- Hook switch HS - Contact a ² - A current flows through the loop of line 1 (-), allowing the telephone operator to talk to the contact. Note that in an actual circuit, a diode and a resistor connected in parallel are called a capacitor.
It is inserted in series with C ₂ , and when charging, the diode is used to charge quickly, and when the contact A ⁰ is switched to the diode D ₃ side and when discharging, the resistor is also used to restore relay A to relay A. It is designed to discharge slowly to prevent such large currents from flowing.

次に常用回線が電話機TEL１によつて使用さ
れている場合、電話機TEL２の送受話器が上げ
られると、回線３（＋）−接点a²−フツクスイツ
チHS−通話回路TC−ダイオードD₄−接点a³−
回線４（−）のループで予備回線に通路電流が流
れ通話が可能となる。 Next, when the regular line is used by telephone TEL1, when the handset of telephone TEL2 is picked up, line 3 (+) - contact a ² - hook switch HS - speech circuit TC - diode D ₄ - contact a ³ −
Through the loop of the line 4(-), a passage current flows through the protection line, making it possible to make a call.

常用回線を使用していた電話機TEL１の送受
話器が下ろされると、回線２（＋）−接点a³−接
点a⁰−ダイオードD₃−継電器Ａ−接点a¹−フツ
クスイツチHS−接点a²−回線１（−）のループ
で継電器Ａが解放する。よつて電話機TEL１は
元の待機状態に戻る。 When the handset of the telephone TEL1 that was using the regular line is put down, line 2 (+) - contact a ³ - contact a ⁰ - diode D ₃ - relay A - contact a ¹ - hook switch HS - contact a ² - line Relay A is released in a loop of 1 (-). Therefore, the telephone TEL1 returns to its original standby state.

なおさきに考案した第１図の電話機の回線切換
回路ではコンデンサC₁は100μF位のものが必要で
あつて、継電器が動作するまでのコンデンサC₁
の充電時間は２〜3msecである。 In the telephone line switching circuit of Fig. 1 that I devised earlier, the capacitor C ₁ needs to be about 100 μF, and the capacitor C ₁ is required to be around 100 μF until the relay operates.
The charging time is 2 to 3 msec.

しかし本考案の一実施例である第２図において
C₂は約4.7μFである。 However, in Fig. 2, which is an embodiment of the present invention,
_C2 is approximately 4.7μF.

以上説明したように、本考案は容量の小さいコ
ンデンサでもつて自己保持形継電器のバイブレー
シヨンを防止すると共に、自己保持形継電器の動
作遅れを生じさせないようにしたので、電話機か
ら確実に、すばやく連絡先に連絡をとれる利点が
ある。 As explained above, this invention prevents vibration of self-holding relays even with small capacitors, and prevents delay in operation of self-holding relays. It has the advantage of being able to contact

[Brief explanation of the drawing]

第１図は本考案者がさきに考案した電話機の回
線切換回路図、第２図は本考案による電話機の回
線切換回路の一実施例である。 TEL１〜TELN……電話機、TC……通話回
路、Ａ……自己保持形継電器、a⁰，a¹，a²，a³…
…自己保持形継電器Ａの接点、D₁，D₂，D₃，D₄
……ダイオード、HS……フツクスイツチ、C₁，
C₂……コンデンサ、１，２……常用回線、３，
４……予備回線。 FIG. 1 is a diagram of a line switching circuit for a telephone previously devised by the present inventor, and FIG. 2 is an embodiment of the line switching circuit for a telephone according to the present invention. TEL1~TELN...Telephone, TC...Telephone circuit, A...Self-holding relay, ^a0 , ^a1 , ^a2 , ^a3 ...
... Contacts of self-holding relay A, D ₁ , D ₂ , D ₃ , D ₄
...Diode, HS...Full switch, C ₁ ,
C ₂ ...Capacitor, 1, 2...Common line, 3,
4...Backup line.

Claims

[Scope of utility model registration request]

In a telephone line switching circuit in which a plurality of telephones are serially connected to two pairs of telephone lines through the contacts of a self-holding relay, one end of each of the self-holding relay and the first diode is connected to the communication circuit, and the self-holding relay is The other ends of the holding type relay and the first diode are connected to the contacts of the self-holding type relay, one of which is connected to the telephone line side, and the other end of the self-holding type relay is connected to the service line side. A capacitor is inserted in parallel with the break contact of the self-holding relay between one side 2 or one side 4 of the protection line, and a capacitor is inserted between the communication circuit connected to the first diode and one side 2 of the regular line or the protection line. On the other hand, between 4 and 1
A second diode was inserted so as to have the opposite polarity to the diode, and a hook switch was inserted between the telephone line and the telephone line side and the other line 1 of the regular line or the other line 3 of the protection line constituting the loop. A telephone line switching circuit characterized by: