JPH0332330B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric insect repellent device for preventing the invasion of pests such as cockroaches that gather in kitchens, dining rooms, food storage rooms, and the like.

Structure of conventional example and its problems As shown in Fig. 1, this type of conventional electric insect repellent device includes an insulator 1 made of an insulating resin material, and an electric insect repellent installed on the insulator 1 in approximately parallel manner with a gap 2 in between. arranged,
It also includes a pair of electrodes 3 and 4 for electric shock made of a conductive resin material, and a power supply device 5 such as a dry battery that applies a voltage of about 10 to 30 volts between the pair of electrodes 3 and 4.

It is known that insects such as cockroaches receive a severe electric shock when a voltage of about 10 volts is applied between their legs. Therefore, if the electric insect repellent device is attached to a wall surface with adhesive or the like, when insects 6 such as cockroaches try to climb up the wall surface, their legs straddle the pair of electrodes 3 as shown in FIG. ，
When the four surfaces are touched, a voltage is applied to the insect 6, and when a current flows inside the insect 6, the insect 6 receives a violent electric shock and falls downward as if flying. In this way, the insects 6 cannot advance beyond this electric shock type insect repellent device, so that it is possible to prevent the invasion of pests such as cockroaches.

However, the above-mentioned conventional electric insect repellent device,
Even if oil stains or water droplets were to adhere between the pair of electric shock electrodes 3 and 4, resulting in a short circuit, there was nothing to notify the user of this, which was very inconvenient for the user. Ta.

Therefore, in order to solve the above problem, an electric shock type insect repellent device shown in FIG. 2 can be considered. In the figure,
Reference numeral 11 denotes an insulator made of an insulating resin material, and on this insulator 11 a pair of electrodes 13 and 14 for electric shock are arranged substantially parallel to each other with a gap 12 in between. This pair of electrodes 13 and 14 are made of a conductive resin material. Reference numeral 15 denotes a power supply device such as a dry battery that applies a voltage of about 10 volts between the pair of electrodes 13 and 14. 16 is a buzzer connected in series to the power supply device 15, and 17 is a limiting resistor connected in series to the buzzer 16.

According to the above configuration, the pair of electrodes 13,
When oil dirt or water droplets adhere between the terminals 14 and a short circuit occurs, current flows to the buzzer 16 and the buzzer 16
can be sounded to notify the user of the status.

However, if the above-mentioned electric insect repellent device is attached to a wall surface with adhesive, etc., when pests such as cockroaches try to climb up the wall surface, their legs straddle the gap 12 and connect the pair of electrodes 13 and 14. If you touch the insect, a current will flow between the pair of electrodes 13 and 14 through the insect's body, causing the buzzer 16 to sound, which may cause the buzzer 16 to sound due to something other than oil stains, etc., which may cause the user to There was a problem in that it was confusing whether the alarm was caused by insects or oil stains.

Furthermore, since the buzzer 16 sounds each time an insect crosses the pair of electrodes 13 and 14, a noise problem occurs in actual use.

Purpose of the Invention In view of the above-mentioned problems, the present invention notifies the user of a short circuit between a pair of electrodes due to oil stains, etc., but does not notify the user if the short circuit is due to insects, thereby preventing the user from being confused by the notification. The purpose is to solve the noise problem as well.

Structure of the Invention In order to achieve the above object, the present invention provides a pair of electrodes arranged substantially parallel to each other with a gap in between, a power supply device that applies a DC voltage between the pair of electrodes, and a power supply device that applies a direct current voltage between the pair of electrodes. A voltage dividing resistor or a time constant circuit that electrically connects the electrodes on one side and the other, a comparator that compares the output voltage of the voltage dividing resistor or the time constant circuit with a reference voltage, and an output of the comparator that operates. The reference voltage inputted by the comparator and the output voltage of the voltage dividing resistor or time constant circuit are set so that the notifying device does not operate to the extent that an insect such as a cockroach straddles between the electrodes. It is the composition.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. In the figure, r ₁ , r ₂ , r ₃ , r ₄ are a pair of electrodes 13, 1
The dividing resistors r ₃ and r ₄ connected between the electrode 14 and one side of the power supply device 15 constitute a voltage dividing resistor. Among these, the dividing resistors r ₁ and r ₂ generate a reference voltage, and the connection point (reference voltage) of these dividing resistors r ₁ and r ₂ is connected to the negative input terminal of the comparator 18.
And the connection point of the dividing resistors r ₃ and r ₄ is the comparator 18
is connected to the positive terminal of the Reference numeral 19 denotes a transistor whose base is connected to the output terminal of the comparator 18, and the collector of this transistor 19 is connected to the buzzer 16 via a limiting resistor 20.

The operation of the circuit configuration shown in FIG. 3 will be explained. This circuit has a resistance of 1M, which is comparable to that of a cockroach or other insect.
Ω, the relationship between the input voltage V ₁ at the positive input terminal of the comparator 18 and the input voltage V ₂ at the negative input terminal of the comparator 18 is V ₁ >V ₂ , and the other pair of electrodes 13, In the case of a short circuit between 14 and 14, divide the resistor so that V ₁ < V ₂
r ₁ , r ₂ , r ₃ , and r ₄ are determined. Therefore, when V ₁ > V ₂ , that is, when an insect such as a cockroach touches the surfaces of the pair of electrodes 13 and 14, , the output of the comparator 18 is the voltage V _cc of the power supply 15
As a result, transistor 19
is turned off, so the buzzer 16 does not sound. Also
When V ₁ <V ₂ , that is, the pair of electrodes 13, 1
When a short circuit occurs due to oil dirt or water droplets adhering between the terminals 4 and 4, the output of the comparator 18 becomes 0V,
As a result, the transistor 19 is turned on, so
Buzzer 16 sounds.

FIG. 4 shows another embodiment of the present invention,
In this embodiment, when a short circuit occurs due to oil stains or water droplets adhering between the pair of electrodes 13 and 14, the
The buzzer 16 is made to sound after a second delay. That is, in the figure, R and C are a resistor and a capacitor connected to the negative electrode 14 of the pair of electrodes 13 and 14, and constitute a time constant circuit. A connection point between the resistor R and the capacitor C is connected to the negative input terminal of the comparator 18.

The operation of the circuit configuration shown in FIG. 4 will be explained. This circuit has a resistance of 1M, which is comparable to that of a cockroach or other insect.
Ω, the relationship between the input voltage V ₁ at the positive input terminal of the comparator 18 and the input voltage V ₂ at the negative input terminal of the comparator 18 is V ₁ >V ₂ , and the other pair of electrodes 13 and 14 In the case of a short circuit between the two, the capacitor C is charged due to the time constant of CR, and after a predetermined period of time, that is, several seconds after the short circuit, the voltage V ₂ applied to the capacitor C becomes V ₁
Dividing resistors r ₁ , r ₂ , capacitor C, and resistor R are determined so that V ₁ >V ₂ , that is _, when a cockroach or the like , 14, the output of the comparator 18 becomes approximately equal to the voltage _Vcc of the power supply 15, as in the circuit of FIG.
Since the transistor 19 is turned off, the buzzer 16 does not sound. Also, if oil stains, water droplets, etc. adhere between the pair of electrodes 13 and 14, resulting in a short circuit,
Due to the time constant of CR, the output of the comparator 18 becomes 0V several seconds after the short circuit occurs, so the transistor 19 turns on and the buzzer 16 sounds.

In the above embodiment, the buzzer 16 is used to notify the user, but the buzzer 16 is not limited to this, and the pilot lamp may be used to notify the user.

Effects of the Invention As described above, according to the present invention, except when an insect straddles between a pair of electrodes arranged substantially parallel to each other with a gap in between, oil stains, water droplets, etc. Since the notification device is activated when the electrodes become short-circuited, the user can easily know that there is a short-circuit between the pair of electrodes due to oil stains or the like. Further, since a notification is issued each time an insect crosses between a pair of electrodes, the noise problem can be solved, and furthermore, it is possible to prevent the user from being confused as to whether the notification is due to an insect or oil stains.

[Brief explanation of the drawing]

Figure 1 is a top view showing a conventional electric insect repellent device;
Fig. 2 is a circuit diagram of an electric insect repellent device that can notify the short-circuit state of a pair of electrodes, Fig. 3 is a circuit diagram of an electric insect repellent device showing one embodiment of the present invention, and Fig. 4 is a circuit diagram of an electric insect repellent device that is an embodiment of the present invention. FIG. 2 is a circuit diagram of an electric insect repellent device showing an example of the present invention. 12... Spacing, 13, 14... Pair of electrodes, 1
5...Power supply device, 16...Buzzer (notification device),
18...Comparator, _r1 , _r2 , _r3 , _r4 ...dividing resistor, R...resistor, C...capacitor.

Claims (1)

[Claims] 1. A pair of electrodes arranged substantially parallel to each other with a gap between them, a power supply device that applies a DC voltage between the pair of electrodes, and a partial voltage that electrically connects the negative side and negative side electrodes of this power supply device. A resistor or a time constant circuit, a comparator that compares the output voltage of the voltage dividing resistor or the time constant circuit with a reference voltage, and an alarm device that operates based on the output of the comparator, the reference voltage being input by the comparator. An electric shock type insect repellent device in which the output voltage of the voltage dividing resistor or the time constant circuit is set so that the alarm device does not operate to the extent that an insect such as a cockroach straddles between the electrodes.