JPH076879U - Signal indicator light - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize blinking control of a light source included in a signal indicator by a simple means. [Structure] For example, a temperature-sensitive switch 5 composed of a temperature-sensitive reed switch is arranged in the vicinity of the current control resistor 4, and the power supply to the light source 1 is interrupted by the temperature-sensitive switch 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a signal indicator lamp having a light source, and more particularly, to an improvement for easily realizing blinking control of a light source in the signal indicator lamp.

[0002]

[Prior art]

 A signal indicator light having a light source is installed, for example, in connection with a production line in a factory, and is used to notify workers of troubles in the process or lack of parts.

In such a signal indicating lamp, the light source is not only turned on continuously but also to distinguish it from information notified by continuous lighting or to make the signal display more conspicuous. It may be lit or blinked intermittently. Conventionally, control means including a time constant circuit has been used for such blinking control of the light source.

[0004]

[Problems to be solved by the device]

 When the range of using the above-mentioned signal indicator lamps has been expanded and the types thereof have become abundant, depending on the application, even if the blinking control of the light source is not performed very accurately, it will function sufficiently, rather than that. A cheaper signal indicator lamp may be required. In other words, it may be sufficient for the light source to simply blink, even if the light source does not blink at the correct period.

Therefore, an object of the present invention is to provide a signal indicator lamp capable of easily and inexpensively providing a light source with a blinking function.

[0006]

[Means for Solving the Problems]

 This invention is directed to a signal indicator lamp having a light source, and in order to solve the above-mentioned technical problem, it is equipped with a temperature sensitive switch means which is turned on / off by a temperature change, and the light source is provided with It is characterized in that blinking is controlled by switch means.

As the above temperature sensitive switch means, for example, a temperature sensitive reed switch, a positive temperature coefficient thermistor element, or the like is used.

[0008]

[Action]

 In this invention, when power is supplied to the light source, the heat generated for some reason causes a temperature change based on the current flowing through the light source, and the temperature sensitive switch means is turned on / off by this temperature change, Thereby, the light source is controlled to blink. That is, as described above, if the temperature sensitive switch means is configured to be turned off by the temperature rise caused by the heat generation caused by the current flow, no current flows in the off state. Therefore, the temperature drops, and after a lapse of a predetermined time, the temperature sensitive switch means is turned on again. In this way, the temperature-sensitive switch means is automatically switched on / off, whereby the light source is controlled to blink.

[0009]

[Effect of device]

 Therefore, according to this invention, since the light source is controlled to blink, substantially only the temperature sensitive switch means is required, and therefore the light source can be provided with a simple and inexpensive blinking function. You can Therefore, unlike the conventional case, the space for accommodating the blinking control circuit is not required, and an extremely small signal indicator lamp can be realized. For example, the temperature-sensitive switch means can be stored in the idle space of the signal indicator lamp, more specifically, in the space of the support pipe or the like.

In the signal indicator lamp as described above, when the light source is continuously turned on, a switch such as a manual switch is provided in parallel with the temperature sensitive switch means, and if this switch is turned on, the light source is turned on continuously. Can be turned on. In addition, by pulling out the switch for such continuous lighting to the outside, control from the outside becomes possible.

[0011]

【Example】

 FIG. 1 shows an electrical configuration included in a signal indicator lamp according to an embodiment of the present invention.

Referring to FIG. 1, the signal indicator lamp includes a light source 1 formed of, for example, a light emitting diode or an incandescent lamp, and power is supplied to terminals 2 and 3 from this light source 1. A current control resistor 4 is arranged on the path from the terminal 2 to the light source 1, and a temperature sensitive switch 5 and a continuous lighting switch 6 are connected in parallel to each other after the resistor 4.

The temperature-sensitive switch 5 described above, like a temperature-sensitive reed switch, is switched from ON to OFF when the temperature rises due to heat from the outside, and when the temperature returns to the original temperature, it is switched from OFF to ON. Switch is used. Since heat is externally applied to such a temperature sensitive switch 5, the temperature sensitive switch 5 is arranged in the vicinity of the current control resistor 4.

In such a signal indicator lamp, the temperature sensitive switch 5 is in an ON state at an initial stage where power is supplied to the terminals 2 and 3. Therefore, power is supplied to the light source 1 and the light source 1 is turned on. After the elapse of a predetermined time, the temperature of the temperature sensitive switch 5 is raised by the heat generated from the current control resistor 4, and the temperature sensitive switch 5 is switched from on to off. As a result, the light source 1 is turned off. Further, since the temperature control switch 5 is turned off, no current flows through the current control resistor 4, so that the temperature of the temperature control switch 5 drops after a predetermined time elapses, and , Turned on again. Such an operation is repeated, and the light source 1 is controlled to blink.

Regardless of the operation described above, when the continuous lighting switch 6 is turned on, the light source 1 is maintained in a continuously lit state.

FIG. 2 shows an electrical configuration included in a signal indicator light according to another embodiment of the present invention. In FIG. 2, elements corresponding to those shown in FIG. 1 are designated by the same reference numerals, and redundant description will be omitted.

Referring to FIG. 2, temperature-sensitive switch 7 is arranged at a position independent of current control resistor 4. The temperature sensitive switch 7 is composed of, for example, a positive temperature coefficient thermistor element. If the temperature sensitive switch 7 is composed of a positive temperature coefficient thermistor element, first, at the initial stage when power is supplied to the terminals 2 and 3, a current flows through the positive temperature coefficient thermistor element (the temperature sensitive switch 7 is in the ON state), 1 is turned on. The current flowing through the PTC thermistor element causes it to self-heat and increase its resistance value. Therefore, after a lapse of a predetermined time, the current flowing through the PTC thermistor element decreases (the temperature sensitive switch 7 is in the off state), and the light source 1 is turned off.

As described above, according to the embodiment shown in FIG. 2, for example, the heat is generated by the temperature-sensitive switch 7 formed of the positive temperature coefficient thermistor element to switch from on to off. In this embodiment, the temperature sensitive switch 7 supplies a small amount of current to the light source 1 even when it is turned off. However, in this specification, such a state is also referred to as an off state.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an electrical configuration included in a signal indicator lamp according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing an electrical configuration included in a signal indicator light according to another embodiment of the present invention.

[Explanation of symbols]

 1 light source 4 current control resistor 5, 7 temperature sensitive switch 6 continuous lighting switch

Claims (1)

[Scope of utility model registration request] 1. A signal indicator lamp having a light source, comprising temperature-sensitive switch means which is turned on / off by a temperature change, and the light source is controlled to blink by the temperature-sensitive switch means. Signal indicator light.