JPH0246437U

JPH0246437U -

Info

Publication number: JPH0246437U
Application number: JP12594288U
Authority: JP
Priority date: 1988-09-27
Filing date: 1988-09-27
Publication date: 1990-03-29
Anticipated expiration: 2003-09-27
Also published as: JPH0724817Y2

Description

[Brief explanation of the drawing]

第１図は本考案の実施例の回路図、第２図は同
上の他の実施例の回路図、第３図は従来例の全体
の回路図、第４図は同上の要部回路図である。４は瞬時接点、５は限時接点、Ｒｙ_１は瞬時接
点用リレーコイル、Ｒｙ_２は限時接点用リレーコ
イル、、ＳＷ_１はスイツチ、Ｃ_２はコンデンサ、
Ｒは抵抗、Ｄはダイオード、Ｄ_１はダイオード、
Ｑ_１はトランジスタである。 Figure 1 is a circuit diagram of an embodiment of the present invention, Figure 2 is a circuit diagram of another embodiment of the same, Figure 3 is an overall circuit diagram of a conventional example, and Figure 4 is a circuit diagram of the main parts of the same. be. 4 is a momentary contact, 5 is a time-limited contact, Ry ₁ is a relay coil for instantaneous contact, Ry ₂ is a relay coil for time-limited contact, SW ₁ is a switch, C ₂ is a capacitor,
R is a resistor, D is a diode, _D1 is a diode,
_Q1 is a transistor.

Claims

[Scope of utility model registration request]

The timer is operated for a limited time by the operation of the switch, and there is also an instantaneous contact that operates at the same time as the application of the operating voltage of this timer and maintains itself, and an instantaneous contact that is connected in series with the above-mentioned timer and instantaneous contact and operates after the timer expires and operates to the timer. A timer circuit comprising a time-limiting contact that interrupts the operating voltage, a relay coil for the momentary contact that is energized at the same time as the operating voltage is applied, a relay coil for the time-limiting contact that is energized after the timer operates, and the operating voltage. a capacitor that is charged via a backflow prevention diode when voltage is applied and serves as a power source for the time-limiting contact relay coil; a switching element that is driven by the time-limiting contact output and energizes the time-limiting relay coil by turning on; and an operating voltage. and a time constant circuit that maintains the on state of the switching element for longer than the holding time of the instantaneous contact when the switch is cut off. , the relationship between the holding time of the instantaneous contact, the holding time of the time-limited contact, and the timer return time was set so that momentary power outage time < the holding time of the instantaneous contact < the holding time of the time-limited contact < the timer return time. 1. A timer circuit characterized in that a parallel circuit including a resistance for limiting charging current and a diode whose direction is forward in the discharge direction of the capacitor is inserted in the charging/discharging path of the capacitor.