JPS6381783A - Magnet plug - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a magnetic plug used as a plug on the electrical appliance connection side of a power cord.

[Background technology]

For example, the power cord for an electric kettle, etc.
Some have a regular plug on one end that connects to an electrical outlet, and a magnetic plug on the other end that connects to an appliance.

This magnetic plug has a magnet in its main body, and the magnet allows the main body to be attracted to an electric appliance such as an electric kettle, thereby establishing an electrical connection with the electric appliance.

However, with conventional magnetic plugs, even if the electrical connection with the appliance is incomplete, it cannot be detected.For example, if the plug is connected to an electric kettle, the water will not boil for a long time. When I investigated, I often found that the connection was incomplete.

[Purpose of the invention]

In view of the above circumstances, an object of the present invention is to provide a magnetic plug that can detect that the electrical connection with an electric appliance is incomplete.

[Disclosure of the invention]

In order to achieve the above object, the present invention provides a magnetic plug in which a main body is provided with a magnet, and the main body is attached to an electric appliance by the magnet to establish an electrical connection with the electric appliance. The gist of the present invention is a magnetic plug characterized in that it is provided with a detection means for detecting that the electrical connection has become incomplete and a notification means for notifying the detection.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an exploded view of an embodiment of the magnetic plug according to the present invention. As shown in the figure, this magnetic plug includes a main body composed of a body 1 and a cover 2, and a magnet 5. body 1 and cover 2
are connected to each other by screws 22 and nuts 23. Inside the body 1, a U-shaped central partition wall 3 is formed at the center. The magnet 5 is mounted in a groove 4 formed in the central partition wall 3. Central partition wall 3
Spring setting grooves 7 are formed on both sides of the spring. This spring set groove 7 is surrounded by a front outer wall 8 and a pair of left and right outer partition walls 9a, 9b, and has a spring locking protrusion 6 formed therein. In this spring set groove 7,
A contact spring 10.10 is installed in each case. A power cord 11 is attached to the rear end of each of these contact springs 10, 10.
Lead terminals 11a and lla extending from the terminals are connected. The contact spring 10 includes a bending part 10a having an inverted U shape and a contact piece 10b integrally projecting from the front end thereof in an L shape. The contact piece 10b is arranged on the body 1 so as to face an insertion hole 13 formed in the front end wall 12 of the body 1. One side 9a of the outer partition wall
A terminal board opening 14 is formed at the front end of the terminal board, and a switch terminal board 15 is installed through this terminal board opening 14. This switch terminal plate 15 is provided with an L-shaped terminal portion 15a at the tip, and this terminal portion 15a is connected to the contact spring 10.
When a connecting bar of an electrical appliance is inserted through the insertion hole 13, the flexible portion 10a is bent and the contact piece 10b retreats, so that it is separated from the switch terminal plate 15. It has become. Recesses 17 and 18 are formed between one of the outer partition walls 9a and the rear outer wall 16 and between one of the outer partition walls 9b and the rear outer wall 16, respectively. The recesses 17 and 18 are also formed in the cover 2, and the recess 1
A circuit board 19 with electronic components is disposed within the recess 1 .
A buzzer 20 including a piezoelectric element is disposed within the buzzer 8 .

The circuit board 19 is electrically connected to the buzzer 20 by a lead wire 21 and also to the switch terminal board 15 . The buzzer 20 emits a sound when voltage is supplied from the switch terminal board 15 through the circuit board 19. This magnetic plug is configured as described above, and is designed to establish an electrical connection with an electrical appliance by adhering the main body to the electrical appliance using a magnet.

Figures 2 (al) and (b) schematically show the relationship between one of the contact springs 10 and the switch terminal plate 15.As seen in Figure 2 (al), when the main body is attracted to an electrical appliance, In the state where the contact spring 10 is not in contact with the switch terminal plate 15, the contact spring 10 is returned to the front and is in contact with the switch terminal plate 15.As shown in FIG. When the connection bar 24 of the electrical appliance is inserted, the connection bar 24 pushes the contact spring 10 so that the contact spring 10 separates from the switch terminal plate 15. In this case, the contact spring 10 and the switch terminal plate 15 are separated so that no voltage is supplied to the buzzer 20, but as shown in Fig. 2(a), the main body may come off from the electrical appliance and the connection bar may become disconnected. 2
4 and the contact spring 10 becomes incomplete, the contact spring 10 contacts the switch terminal plate 15 and the buzzer 20
voltage is supplied to. This activates the buzzer 20 to notify that the electrical connection with the appliance is incomplete. That is, the switch terminal plate 15 and one of the contact springs 10 in contact with the switch terminal plate 15 serve as detection means for detecting that the electrical connection with the electric appliance is incomplete, and the buzzer 20 notifies the detection. It is a means of notification.

As described above, this magnetic plug is equipped with a detection means for detecting that the electrical connection with the electric appliance is incomplete and a notification means for notifying the detection.

Therefore, when connecting to an electrical appliance, even if you intend to make a perfect electrical connection, if the electrical connection is incomplete,
You can know this right away, and you can also know right away if the appliance is disconnected for some reason after it is fully connected. Moreover, if the notification means is equipped with the buzzer 20 as in this embodiment, even if you are in a place where you cannot see the electrical connection status with the appliance, you can know that the connection has become incomplete. .

As a detection means, for example, a current detection method can be considered, but since this method has a complicated circuit,
It cannot be miniaturized and it is difficult to make it practical. On the other hand, with the detection means as in the embodiment described above, the main body can be made smaller.

In addition, in the above embodiment, the main body has a laterally symmetrical shape. Therefore, the balance is good, the main body does not easily come off from the appliance, and it is easy to handle. Furthermore, the insulation distance between the contact spring and the circuit board can be easily maintained.

FIGS. 3 to 5 each illustrate a different embodiment. As shown in these figures, each of these magnetic plugs has a lamp 25 in addition to the buzzer 20 as a notification means, and even when this lamp 25 lights up, the electrical connection with the electric appliance is incomplete. It is designed to let you know. The magnetic plug shown in Figure 3 is
A type in which a buzzer is placed on one side of the main body and a circuit board is placed on the other side (same type as the embodiment shown in Figure 1), and a lamp is provided, and a magnetic plug shown in Figure 4. The magnetic plug shown in Figure 5 has a buzzer and a circuit board placed on one side of the main body and a lamp. This is the type where a lamp is installed. In these devices, the notification means may not include a buzzer and may simply include a lamp.

6 and 7 show yet another embodiment. As shown in these figures, this magnetic plug has a buzzer sound hole 27 and a first
It has the same configuration as the magnetic plug shown in the figure.

The buzzer sound hole 27 is formed in the rear outer wall 16 on the side of the main body where the buzzer 20 is provided, and guides the sound generated by the buzzer 20 to the outside. When the buzzer sound hole 27 is formed in this manner, the buzzer sound can be heard clearly and the notification effect can be increased. Moreover, since the sound output hole 27 of the buzzer is formed on the side of the main body, it is difficult for water or hot water spilled from, for example, an electric kettle to enter the main body of the magnetic plug according to the present invention. teeth,
The invention is not limited to the above embodiments.

〔Effect of the invention〕

As explained above, the magnetic plug according to the present invention has a magnetic plug in its main body, and the main body is attracted to an electric appliance by the magnet, thereby establishing an electrical connection with the electric appliance. Since the plug is characterized in that the main body is provided with at least a detection means for detecting that the electrical connection has become incomplete and a notification means for notifying the detection, the electrical connection with the electrical appliance is improved. For example, when using an electric kettle, you can prevent water from not boiling for a long time.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an embodiment of the magnetic plug according to the present invention, and Fig. 2 schematically shows the relationship between one of the contact springs and the switch terminal plate. An explanatory diagram showing a state in which the main body is not attracted to an electric appliance, FIG. Fig. 7 is a partially cutaway plan view of the main body of the embodiment shown in Fig. 6. 1.2 Main body 5 Magnet 10 Contact Spring (detection means) 15... Switch terminal board (detection means) 20... Buzzer (notification means) 25.
... Lamp (notification means) 27 ... Buzzer sound hole Agent Patent attorney Takeshi Matsumoto

Claims (4)

[Claims] (1) In a magnetic plug whose main body is equipped with a magnet and which is designed to attract the main body to an electrical appliance and establish an electrical connection with the electrical appliance, the electrical connection with the electrical appliance is at least incomplete. A magnetic plug characterized in that it is provided with a detecting means for detecting that something has happened, and a notifying means for notifying the detection. (2) The magnetic plug according to claim 1, wherein the notification means includes a buzzer. (3) The magnetic plug according to claim 2, wherein a buzzer sound hole is formed in the side of the main body. (4) The magnetic plug according to any one of claims 1 to 3, wherein the notification means includes a lamp.