JPH0655599U - Electric iron - Google Patents

Abstract

(57) [Abstract] [Purpose] When the ironing work is interrupted, the power supply is automatically cut off, and when the ironing work is restarted, the power supply is automatically started to save the power, and the power is supplied again. Get an electric iron that can prevent fire and other hazards when left unattended. [Structure] An acceleration sensor 21 having a sensitivity in a direction along a stretch plate 11, and an acceleration switch device 23 inserted in the middle of a circuit for energizing a heater 12 are provided. When the acceleration is detected, it conducts, and when the acceleration is not detected for a certain period of time, the conduction is cut off.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric iron. In particular, the present invention relates to an electric iron capable of saving electric power by automatically cutting off power when ironing work is interrupted and preventing a risk of fire or the like.

[0002]

[Prior art]

 In order to prevent overheating due to excessive energization, conventional electric irons incorporate a temperature-sensitive switch that detects the temperature of the stretched board and interrupts energization to the heater. In addition, there is also known that a switch device with a timer is incorporated, in which the power is cut off after a certain period of time with the electric iron standing up in order to prevent the danger of being left with electricity. .

[0003]

[Problems to be solved by the device]

 In such a conventional electric iron, if the stretched board is left in a horizontal state, the electric current cannot be cut off, and the electric power is consumed wastefully during the standing time. Sometimes, there was a risk of burning things and causing a fire. The present invention has been made to solve this problem. Therefore, an object of the present invention is to provide an electric iron that can automatically turn off the power when the ironing work is interrupted and can automatically start the power when the ironing work is restarted. is there.

[0004]

[Means for Solving the Problems]

 The above problems include an acceleration sensor having sensitivity along the stretched plate and an acceleration switch device inserted in the middle of a circuit for energizing a heater for heating the stretched plate. The problem can be solved by providing an electric iron that conducts when the acceleration sensor detects the acceleration and interrupts conduction when the acceleration is not detected for a certain period of time. In the above, it is preferable that the acceleration sensor has two sensor chips, and the sensitivity axes of the sensor chips are arranged orthogonally along the stretched plate.

[0005]

[Action]

 In the electric iron according to the present invention, since the accelerating member is constantly accelerating during the ironing work, the acceleration sensor continues to detect the acceleration, and therefore the acceleration switch device cuts off the power supply to the heater. There is no. When the work is interrupted, the acceleration sensor output is zero because no acceleration occurs regardless of whether the electric iron stretcher plate is placed horizontally or vertically. Therefore, after a lapse of a certain period of time, the acceleration switch device automatically operates and the power to the heater is cut off. When the work is resumed, the power supply is resumed and the ironing work can be continued without any trouble. Even if the power supply is connected, if work is not restarted, acceleration will not occur and the power supply will be cut off. This will reduce the waste of power and avoid the risk of fire caused by leaving the power supply.

When the sensitivity axes of the two sensor chips are arranged orthogonally along the stretch plate, the acceleration sensor has sensitivity in all directions of the stretch plate. Therefore, no matter which direction the iron is applied, the acceleration is detected and the power supply is not interrupted during work.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the electric iron of the present invention. This electric iron is composed of a heating unit 10 and a control unit 20. The heating unit 10 is composed of a boat-shaped stretched plate 11 having a tip on one side in the longitudinal direction and a heater 12 for heating the stretched plate 11. The terminal of the heater 12 is connected to the output terminal 29 of the control unit 20. The power consumption of this heater is 800 W / hour.

The control unit 20 is composed of an acceleration sensor 21, an acceleration switch device 23, and a temperature sensitive switch device 27. The acceleration sensor 21 has two sensor chips 22 and 22 '. The sensitivity axis X of the sensor chip 22 is arranged along the longitudinal direction of the stretching plate 11. The sensitivity axis Y of the sensor chip 22 'is arranged orthogonal to the sensitivity axis X. The sensor chips 22 and 22 'used in this embodiment are piezoelectric type acceleration sensor chips. This is composed of a laminate of a specimen-side electrode, a filmy piezoelectric body made of polyvinylidene fluoride, a loader-side electrode, and a loader that acts as an inertial mass in this order. It is always line-symmetric with respect to the sensitivity axis (X or Y 1) that passes through the center of the plane of the body vertically.

This acceleration sensor chip has a maximum sensitivity distribution in the sensitivity axis direction, but if it is arranged so that the two sensitivity axes are orthogonal to each other, it has sensitivity in all directions in the plane. These acceleration sensor chips 22 and 22 ′ are rigidly mounted on a pedestal provided on the acceleration sensor 21. A lead wire is pulled out from the acceleration sensor 21 and connected to the acceleration switch device 23.

The acceleration switch device 23 is inserted between the power input terminal 28 and the temperature sensitive switch device 27 in the middle of the circuit for energizing the heater 12. The acceleration switch device 23 is composed of an intermittent switch 24, a power-off timer 25, a starting circuit 26, and a control section for controlling these, and based on acceleration information provided by the acceleration sensor 21, the It is a device that intermittently outputs the supplied current toward the temperature sensitive switch 27. The control unit of the acceleration switch device 23 brings the switch 24 into a conducting state while the acceleration sensor 21 detects the acceleration, and cuts off the conduction when the acceleration is not detected for a certain time after the acceleration becomes zero. Is configured. The power-off timer 25 sets the holding time until the conduction is cut off so as to be adjustable. The holding time is, for example, 10 seconds.

A starter circuit 26 is attached to the acceleration switch device 23, so that when the ironing work is started, the switch 24 can be operated until the stretching plate 11 reaches a predetermined temperature even if the iron is stationary. It is designed so that the heater 12 can be energized and preheated without being shut off. This is to detect when the voltage V is applied to the input terminal 28 from the power supply, and to hold the switch 24 so as not to be interrupted for a period from this time until the temperature of the stretching plate 11 reaches a constant value. To be achieved.

The temperature-sensitive switch device 27 is a device for detecting the temperature of the stretch plate 11 to interrupt the electric current to the heater 12 to maintain the ironing temperature at an adjustable constant temperature. Here, the bimetal switch, which is also used for ordinary electric irons, is used. The output of the temperature sensitive switch device 27 is connected to the output terminal 29.

Next, the operation of this embodiment will be described. When the power cord 30 of the electric iron is connected to the power source, the electric current is supplied to the heater 12 through the switch 24 and the temperature sensitive switch device 27, so that the stretching plate 11 is heated. Since the starting circuit 26 is operating until the stretch board 11 reaches a predetermined temperature, the switch 24 is not cut off even when the electric iron is left stationary. When the stretched plate 11 reaches the set predetermined temperature, the starting circuit 26 stops its operation, and the operation based on the acceleration information from the acceleration sensor 21 is started. That is, while the ironing operation is being performed, acceleration is generated in any direction along the stretching plate 11, so that one of the sensor chips 22 and 22 'whose sensitivity axes X and Y are orthogonal to each other, Alternatively, both sides detect the acceleration, and thereby the switch 24 is held on the conductive side.

Even if the ironing work is temporarily interrupted, the conduction state is continued as long as it is within the retention time set by the power-off timer 25. Also during this time, the temperature sensitive switch device 27 is intermittently operated in order to keep the temperature of the stretching plate 11 constant. Even if the ironing work is interrupted and the electric iron is not moved even after the hold time of the power-off timer 25 has elapsed, the power-off timer 25 is activated and the switch 24 cuts off the conduction. Therefore, no current flows even if the temperature sensitive switch device 27 is conductive. When the ironing work is resumed, the switch 24 immediately becomes conductive. At this time, the temperature is lowered and the temperature sensitive switch device 25 is also conductive, so that the power supply to the heater 12 is restarted.

(Test Example) The electric iron of the above example was lent to 50 housewives for one month, and the accumulated power consumption and total time required for ironing during that period were measured, and this was used as a commercially available 800W electric appliance. Compared with the case of using iron. When the hold time of the power-off timer 25 of the acceleration switch device 23 was set to 10 seconds, the average electric power consumption of the electric iron of the example was 70% of the commercial product. From this result, it is clear that the electric iron required for ironing was saved by using the electric iron of the embodiment. It is also clear that the danger of being left without electricity was prevented.

[0016]

[Effect of device]

 The electric iron of the present invention has an acceleration sensor and an acceleration switch device, and cuts off the power supply to the heater when the acceleration is not detected for a certain period of time. It also has the effect of preventing fires and other dangers.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an embodiment of the present invention.

[Explanation of symbols]

11 ... Stretching plate, 12 ... Heater, 21 ... Acceleration sensor, 2
2, 22 '... Sensor chip, 23 ... Acceleration switch device, X, Y ... Sensitivity axis.

Claims (2)

[Scope of utility model registration request] 1. An acceleration sensor having an acceleration sensor having a sensitivity in a direction along a stretch board of an electric iron, and an acceleration switch device inserted in the middle of a circuit for energizing a heater for heating the stretch board. An electric iron, wherein the device conducts when the acceleration sensor detects acceleration and interrupts conduction when the acceleration is not detected for a certain period of time or more. 2. The acceleration sensor according to claim 1, wherein the acceleration sensor has two sensor chips, and the sensitivity axes of the respective sensor chips are arranged orthogonally along the stretched plate. Electric iron.