JPS6454221U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の第１の実施例の構成を示す
回路図、第２図はこの考案の第２の実施例の構成
を示す回路図、第３図は第１の実施例に残る問題
点の説明図、第４図はこの考案の第３の実施例の
構成を示す回路図、第５図は従来の負荷切替装置
の構成を示す回路図である。 １……電源、２……電源スイツチ、３……第１
の負荷、４……第２の負荷、５……リレーのコイ
ル、６……リレーの切替スイツチ、７……熱応動
スイツチ開成駆動用ヒータ、８……熱応動スイツ
チ。 Fig. 1 is a circuit diagram showing the configuration of the first embodiment of this invention, Fig. 2 is a circuit diagram showing the structure of the second embodiment of this invention, and Fig. 3 shows problems remaining in the first embodiment. FIG. 4 is a circuit diagram showing the configuration of a third embodiment of this invention, and FIG. 5 is a circuit diagram showing the configuration of a conventional load switching device. 1...Power supply, 2...Power switch, 3...First
load, 4... Second load, 5... Relay coil, 6... Relay changeover switch, 7... Heater for driving the thermally responsive switch to open, 8... Thermal responsive switch.

Claims (1)

【実用新案登録請求の範囲】 (1) 電源および電源スイツチの直列回路の一端
に第１および第２の負荷の一端とリレーのコイル
の一端と熱応動スイツチ開成駆動用ヒータの一端
とをそれぞれ接続し、前記電源および電源スイツ
チの直列回路の他端に前記リレーの切替スイツチ
の共通接点と前記熱応動スイツチ開成駆動用ヒー
タの他端とをそれぞれ接続し、前記切替スイツチ
の常閉接点に前記第１の負荷の他端を接続すると
ともに前記切替スイツチの常開接点に前記第２の
負荷の他端および前記リレーのコイルの他端を接
続し、前記切替スイツチの共通接点と常開接点と
の間に前記熱応動スイツチ開成駆動用ヒータの発
熱に応答して開成する熱応動スイツチを接続した
負荷切替装置。 (2) 前記電源および電源スイツチの直列回路の
他端および前記切替スイツチの共通接点と前記熱
応動スイツチ開成駆動用ヒータの他端および前記
熱応動スイツチとの間にダイオードを挿入接続し
た実用新案登録請求の範囲第(1)項記載の負荷切
替装置。 (3) 前記熱応動スイツチ開成駆動用ヒータの一
端と前記電源および電源スイツチの直列回路の一
端との間に抵抗を挿入接続し、前記熱応動スイツ
チ開成駆動用ヒータおよび抵抗の接続点と前記切
替スイツチの共通接点との間に定電圧ダイオード
を接続した実用新案登録請求の範囲第(2)項記載
の負荷切替装置。[Claims for Utility Model Registration] (1) One end of the first and second loads, one end of the relay coil, and one end of the heater for driving the opening of the thermally responsive switch are connected to one end of the series circuit of the power supply and power switch, respectively. The common contact of the changeover switch of the relay and the other end of the heater for opening the thermally responsive switch are connected to the other end of the series circuit of the power supply and the power switch, and the normally closed contact of the changeover switch is connected to the other end of the changeover switch of the relay. At the same time, the other end of the second load and the other end of the coil of the relay are connected to the normally open contact of the changeover switch, and the common contact and the normally open contact of the changeover switch are connected. A load switching device in which a thermally responsive switch that opens in response to heat generated by the heater for driving the thermally responsive switch to open is connected therebetween. (2) Registration of a utility model in which a diode is inserted and connected between the other end of the series circuit of the power supply and the power switch, the common contact of the changeover switch, and the other end of the heater for driving the opening of the thermally responsive switch, and the thermally responsive switch. A load switching device according to claim (1). (3) A resistor is inserted and connected between one end of the heater for driving the thermally responsive switch to open and one end of the series circuit of the power supply and the power switch, and a connection point between the heater and the resistor for driving the thermally responsive switch to open and the switching point. The load switching device according to claim (2) of the utility model registration, wherein a constant voltage diode is connected between a common contact point of the switch.