JPH1133713A - Soldering iron with timer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soldering iron with which useless electric power consumption, deterioration of a heater and generation of fire and the like are prevented because the power supply is automatically cut off by a timer, even if cutting off the power supply is neglected after the use of the soldering iron by installing a switch means for cutting off the current to the heater when the timer time has passed. SOLUTION: When the time set by a setting switch has passed, the timer 10 operates and the relay 11 is turned off. For example, if the timer 10 is mechanical and its contact is turned on when the set time has passed, the excitation power supply of the relay 11 is controlled by this timer contact, and the contact b of the relay 11 which is serially inserted to the power supply circuit is cut off. Or, the timer contact may be serially inserted in the power supply circuit of the soldering iron if the timer 10 and the relay 11 are regarded as one unit. In this case, however, if the current which flows through the soldering iron is too big, the contact with the movable part is deteriorated or tends to be heated easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a soldering iron with a timer.

[0002]

2. Description of the Related Art A soldering iron is used for wiring a circuit or for connecting a metal plate. The performance of the soldering iron is such that it has a heat capacity corresponding to an object and its temperature greatly changes during use. Various measures have been added, for example, there is no short time until the temperature is reached, and the shape and size of the portion where the solder is melted are devised so that the work is easy and the solder is easily applied.

FIG. 3 is a schematic view showing an example of a conventional soldering iron, and FIG. 4 is an electric circuit diagram thereof. Externally, as shown in FIG. 3, it comprises a soldering tip 1 to be soldered, a heater 2 for heating it, and a gripping part 3. The gripping part 3 has a power cord 4 and a tip. An attached plug 5 is provided. Electrically, the temperature around the heater 8 is detected by the temperature detector 6, and the amount of heat generated is controlled by the control unit 7 turning on / off the power or performing current control by a thermistor based on the detection result.

[0004]

The power source of the above-mentioned conventional soldering iron is turned on by inserting a plug into an outlet such as a commercial power source, and turned off by pulling out the plug. Further, even when the power switch is provided, the power switch is turned on and off by a manual operation of the user. For this reason, if the power is forgotten to be turned off after use, the power is wasted, the life of the heater is shortened, and in addition, there is a danger of burns or a fire source depending on the situation. However, no countermeasures were taken against such a power failure.

An object of the present invention is to provide a soldering iron with a timer having a function of preventing forgetting to turn off the power after use and preventing occurrence of fire or the like.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a heater, a timer whose timer time can be set, and an elapse of the timer time after the timer time is set in the timer. And a switch for interrupting the current to the heater when the timer expires.

Further, the present invention provides a timer capable of setting a start point and an end point of an on-time and an off-time of a heater and its contact alternately and an electric current supplied to the heater during the on-period of the contact of the timer. And a switch means for interrupting a current to the heater during a period in which a contact point of the timer is off, and a soldering iron with a timer provided.

Further, according to the present invention, a heater, a timer, a sensor for detecting whether or not the user is grasping, and a state in which the user is not grasping are set in the timer. Switch means for interrupting the current supplied to the timer when the set timer time has elapsed, and a soldering iron with a timer provided.

[0009]

Embodiments of the present invention will be described below. FIG. 1 shows an example of an electric circuit of a soldering iron with a timer according to the present invention, and FIG. 2 is an external view thereof. FIG.
(A) is an external view of the grip portion 3 when viewed from above, FIG.
(B) is an external view when viewed from the side. The time setting switch 12 of the timer is attached to the grip portion 3. As shown in FIG. 1, this electric circuit has a configuration in which a relay 11 is inserted in series into a conventional circuit of a soldering iron, and its on / off is controlled by a timer 10.

The timer 10 may be of a mechanical structure or an electronic one. In any case, any device may be used as long as the timer 10 operates when the time set by the setting switch 12 has elapsed and the relay 11 is turned off. For example, if the timer 10 is mechanical and the timer contact turns on after the set time has elapsed, the relay 1 is connected to the timer contact.
1 is controlled so as to cut off the contact b of the relay 11 inserted in series in the power supply circuit.

Alternatively, the timer 10 and the relay 11 may be considered as an integrated structure, and the contacts of the timer 10 may be directly inserted in series into a power supply circuit of a soldering iron. However, in this case, if a large amount of current flows through the soldering iron, a large amount of current will flow through the timer contact, so that the contact with the movable portion deteriorates and tends to have heat. Therefore, this integrated structure is suitable for simplifying the structure and reducing the cost at a small current (small capacity).

According to the configuration shown in FIGS. 1 and 2, the user sets a time corresponding to his / her scheduled use time to the setting switch 12 at the start of use, and starts work.
If the power-off operation is forgotten after use, the power is automatically turned off by the timer after the lapse of the set time, and the occurrence of fire or the like can be prevented. If the setting time of the timer for this purpose can be set, for example, in units of 30 minutes, the structure is simple and practically sufficient.

Next, a modification of the configuration example of FIG. 1 will be described. One is that the timer 10 in FIG. 1 and the setting switch 12 in FIG. 2 have a function of setting a plurality of on / off times, for example, as shown in FIG. In the example of FIG. 5, it turns on after T1 and T3 hours from the setting time,
It is set to be turned off after T2 and T4 hours, and if a break time is set between T2 and T3, which are turned off halfway, one day of work can be performed with one setting. Become like

FIG. 6 shows another modification, in which a sensor 13 is added to the circuit of FIG. As the sensor 13, FIG.
The contact sensor is attached to the grip portion 3 of the camera and detects whether the user is holding the soldering iron. Then, when the user removes the soldering iron, the timer starts, and the power is turned off by the relay 11 when the set time of the timer elapses. In this case, if the setting time of the timer 10 is set to, for example, 20 minutes, the power is automatically cut off when the soldering iron is not gripped by the user even after the lapse of 20 minutes or more. Can be prevented.
Also, when the plug is inserted into the power outlet at the start of use, the timer starts when the user does not hold it, but this usually requires only a few minutes to be ready for use and requires special measures at the start of use. do not do. FIG.
In this case, the setting time of the timer may be fixed unless it is necessary to change the setting time.

In addition to the above-mentioned modifications, one of the states in which the timer can be set may be a state in which the timer is not used, that is, a setting in which the timer is used in the same state as in the related art.

[0016]

According to the present invention, even if the user forgets to turn off the power after using the soldering iron, the power is automatically shut off by the timer to prevent unnecessary power consumption and deterioration of the heater.
Further, there is an effect that occurrence of a fire or the like can be surely prevented.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing an example of a soldering iron with a timer according to the present invention.

FIG. 2 is an external view of the soldering iron of FIG.

FIG. 3 is an external view of a conventional soldering iron.

FIG. 4 is an electric circuit diagram of the soldering iron of FIG. 3;

FIG. 5 is a time chart showing another example of a timer operation of the soldering iron with a timer of FIG. 1;

FIG. 6 is an electric circuit diagram showing a modification of the soldering iron with a timer of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Iron tip 2 Heater part 3 Handle part 8 Heater 10 Timer 11 Relay 12 Time setting switch 13 Sensor

Claims (3)

[Claims] 1. A heater, a timer whose timer time can be set, and a current supplied to the heater until the timer time elapses after the timer time is set in the timer, and when the timer time elapses, Switch means for interrupting the current to the heater; and a soldering iron with a timer. 2. A heater, a timer capable of setting a time of a start point and an end point of an ON time and an OFF time of an alternately repeating ON time and OFF time of a contact thereof, and a contact of the timer supplies a current to the heater during the ON period; Switch means for interrupting the current to the heater during a period in which the contact point of the timer is off, and a soldering iron with a timer. 3. A heater, a timer, a sensor for detecting whether or not the user is aware, and a timer time set in the timer for detecting that the user is not aware. Switch means for interrupting the supply current to the timer when continued. A soldering iron with a timer, comprising: