JPH0119337Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a connector for electrical appliances such as irons and hair dryers, which are used by inserting the plug into an outlet as needed, and in particular to prevent forgetting to turn off the power. Concerning connectors with functions.

In the past, there have been many cases where fires have occurred due to improper handling of electrical appliances such as irons and hair dryers. The cause of this is that people often forget to turn off the power when they leave the area for other errands while using these appliances, causing them to overheat and ignite nearby flammable materials. .

As a means of connecting electrical appliances that may overheat if left unused for long periods of time, this invention generates a sound to alert the user at least while the electrical appliance is energized. The purpose of this project is to provide a connector with a function to prevent accidents caused by forgetting to turn off the power to electrical appliances in use.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram for explaining the principle of a connector for electrical appliances according to the present invention. This connector 1 includes a plug electrode 3 to be inserted into an outlet 2 of commercial power wiring, and a sound generation circuit 5 to which power is supplied from the plug electrode 3 via a transformer 4.
and plugs 7 already installed in various electrical appliances 6.
and a connection port 8.

Of these, the sound generation circuit 5 includes a rectification circuit 51, a control circuit 52 for controlling the sound generation vibrator 54, and an oscillation circuit 53. The control circuit 52 includes a vibrator 54
This is a circuit for intermittent and melodic sounding, and the circuit configuration is set depending on the tone to be generated.

In this example, the vibrator 54 continues to generate the sound set by the control circuit 52 while the connector 1 is energized by inserting the plug electrode 3 into the outlet 2 . Therefore, the sound generated by the vibrator 54 needs to have a tone that does not make the user or anyone nearby uncomfortable while using the electrical appliance 6 via the connector 1. For example, when considering use in a general household, the sound pressure does not need to be very high; rather, it is better to have a smooth and harmonious tone, and it is especially preferable to make a melody sound like that of an electronic music box.

An example of such a sound source is when a porcelain piezoelectric element made of barium titanate, zircon/lead titanate, or a multi-component solid solution of zircon/lead titanate is bonded to a metal or plastic diaphragm. A so-called piezoelectric buzzer or the like, which is composed of a vibrator formed by baking an electrode, and an oscillation circuit and a control circuit for vibrating the vibrator, is most suitable.

In other words, the piezoelectric buzzer system can be made smaller because the vibrator can be made thinner, and the power consumption is lower than other buzzers, which is advantageous, and the control circuit can make the sound continuous or intermittent. Of course, this is because the timbre can be changed to produce a melodic sound.

Of course, the piezoelectric element for the vibrator is not limited to this example, and a polymer-based piezoelectric element, such as polyvinylidene fluoride having a high piezoelectric constant, may be used.

FIG. 2 is a perspective view of the main body of the connector 1. A transformer and a sound generation circuit are built into a case 10 made of plastic molding, and a plug electrode 3 is fixed at one end thereof, and a connection port 8 is provided at the other end through which a plug of a desired electric appliance can be inserted and connected. . These are electrically connected within the case 10, and the sound generated from the vibrator exits the case 10 through a sounding hole 11 provided in the case 10.

When using this connector 1, plug electrode 3
into the commercial power wiring outlet, and connect it to connection port 8.
Simply plug in the desired appliance, such as an iron or hair dryer, into the machine. When the plug electrode 3 is inserted into an outlet, a predetermined sound is generated. Therefore, even if the user is using an electrical appliance and suddenly leaves the area for other errands, this sound will alert the user to be careful about forgetting to turn off the power. is definitely prevented. By preventing forgetting to turn off the power, it is possible to prevent accidents such as fires caused by overheating of electric appliances, and also to prevent wasted power from being wasted. Furthermore, the selection of the sounds generated by the sound generation circuit 5 is effective in evoking a comfortable mood in the user.

Incidentally, it is preferable to provide the connection port 8 so as to enable connection with an electric appliance, since it is versatile enough to be applied to any electric appliance that is already in use. However, the connection device 1 is not limited to this.
may be used as a plug for certain electrical appliances, an example of which is shown in FIG.

In this embodiment, there is no connection port for a plug of an electric appliance, and a plug electrode 3 and a lead wire 1 are provided inside the case 10.
By providing a connection part with 2 and drawing the lead wire 12 directly from the plug electrode 3 to the outside of the case 10 and connecting this lead wire 12 to the main body of a specific electric appliance in advance when manufacturing the electric appliance, It is provided as an accessory part.

By the way, in the example shown in Fig. 1, power is supplied to the sound generation circuit 5 from the transformer 4 connected in parallel to the commercial power supply wiring, so the plug electrode 3 can be inserted into the outlet regardless of whether the electric appliance is in use or not. It makes a sound until it is pulled out. However, electrical appliances are usually equipped with a switch,
In the case of switch-off, it does not necessarily have to be pronounced. That is, it is preferable that the switch be turned on so that the sound is generated only when the electric appliance is energized.

FIG. 4 shows an embodiment of the present invention that achieves this. This is done by inserting and connecting a small resistor R for voltage division in series with the circuit from the plug electrode 3, without using a transformer as shown in Figure 1, and from this resistor R to the sound generating circuit 5.
(This circuit configuration is the same as that in FIG. 1, so the explanation will be omitted.) This is an example in which a power source is taken out. By making it possible to control the power supply to the sound generation circuit 5 with the switch SW already installed in the electric appliance 6, it is possible to generate sound only when the switch SW is on, that is, when the electric appliance is energized.

FIG. 5 shows another example in which power is taken out to the sound generation circuit 5 by a shunt circuit including a transformer 4 and a saturable reactor 13. That is, in this circuit, when the plug electrode 3 is inserted into the outlet 2, the plug 7 of the electrical appliance is inserted into the connection port 8, and the switch SW is turned on, the load current flows and the saturable reactor 13 becomes saturated. As a result, the power supply voltage is applied to the transformer 4, and the sound generation circuit 5 operates. On the other hand, when the switch SW is off, the saturable reactor 13 does not saturate, so the voltage obtained from the transformer 4 does not reach the operating voltage of the sound generation circuit 5, and therefore, the voltage obtained from the transformer 4 does not reach the operating voltage of the sound generation circuit 5. Sound can only be generated while the SW is on.
Therefore, the switch will surely issue a warning against forgetting to turn off the power.

All of these circuits are built into the case 10 as shown in FIG. 2, but they may also have a structure as shown in FIG. 3.

Although the present invention has been explained above using several embodiments, the connector according to the present invention is not limited to these embodiments. It is obvious that various modifications can be made to the shape of 10, etc., without needing to exemplify them.

[Brief explanation of the drawing]

FIG. 1 is a block diagram for explaining the principle of the connector according to the present invention, FIG. 2 is a perspective view of one embodiment of the connector according to the present invention, FIG. 3 is a perspective view of another embodiment, and FIG. 4 and 5 are block diagrams of the first and second embodiments of the present invention, respectively. The names of the main reference numbers in the drawings are as follows: 1: Connector body, 2: Outlet, 3: Plug electrode,
4: Transformer, 5: Sound generation circuit, 6: Electrical equipment,
7: Plug, 8: Connection port, 10: Case, 11:
Sounding hole, 51: Rectifier circuit, 52: Control circuit, 5
3: Oscillation circuit, 54: Oscillator.

Claims (1)

[Scope of utility model registration request] A small case with a hole for sound generation is provided with a plug electrode for insertion into an outlet, and an electrical connection part for connecting an electric appliance to a power source obtained through the plug electrode, and from the plug electrode to the By connecting a sounding circuit to one of the two lines leading to the electrical connection via a shunt or voltage dividing circuit and incorporating it into the case, the electric appliance connected to the electrical connection For an electric appliance equipped with a mechanism for preventing forgetting to turn off the power, the sound generation circuit is configured to display sound only when the power is on, and the sound generation circuit includes a sound generation vibrator, a control circuit for controlling the sound generation vibrator, and an oscillation circuit. Connector.