JPH0334070Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a power cord for an electric appliance, and more particularly to a structure of a power cord outlet in an electric appliance in which the power cord is connected to and removed from a plug in the appliance body.

[Conventional technology]

BACKGROUND ART Electrical appliances such as electric water heaters, tabletop cookers, and tabletop steam towel dispensers are configured so that a power cord can be attached to and detached from the appliance body (hereinafter simply referred to as the appliance body) for water injection or cleaning. In order to enable such attachment and detachment, there is a structure in which two spring electrodes of the power cord outlet are sandwiched between the plug electrode of the plug provided on the appliance body. In this case, it was difficult for people with weak grip strength to connect and disconnect the power cord from the outlet.

Recently, electrical outlets that solve this problem by using permanent magnets have been put into practical use. As an example, a magnetic material such as an iron plate is installed in the center of the plug of the device body, a permanent magnet is installed near the connection port of the power cord outlet, and the electrode is a retractable leaf spring electrode. There is one in which the outlet is attracted to the device body by the attraction force of the magnetic material, and the end face of the plug electrode comes into elastic contact with the contact point of the outlet plate spring electrode.

[Problem that the invention attempts to solve]

The above-mentioned power outlet using a permanent magnet has a connection opening that is larger than the connection opening of a normal power outlet so that a plug electrode can be loosely inserted into it, and is large enough to fit a small finger. Moreover, the contacts of the leaf spring electrodes are completely visible from the connection port. Therefore, there is a problem in that if the power cord is left connected to the power outlet and removed from the appliance body, there is a greater risk of electric shock than with a normal outlet.

[Means for solving problems]

The power cord for electrical appliances according to the present invention has a sounding device disposed inside the housing of the electrical outlet that has a built-in permanent magnet, and a rod that is interlocked with the electrical outlet leaf spring electrode and can come into contact with the diaphragm of the sounding device. It is characterized by

[Effect]

As long as the power cord is connected to the power outlet, the sound generating device remains energized. The rod moves in conjunction with the expansion and contraction of the outlet plate spring electrode, and when the outlet is disconnected from the plug of the device body and the plate spring electrode is extended, it is separated from the diaphragm of the sounding device and allows the diaphragm to vibrate, that is, ring. . On the other hand, when the outlet is fitted into the plug of the device main body and the leaf spring electrode is contracted, the rod comes into contact with the diaphragm of the sounding device and prevents the diaphragm from vibrating.

〔Example〕

Examples of the present invention will be described below.

FIG. 1 shows an outline of a power cord for electrical appliances according to an embodiment of the present invention. The power cord 1 includes an insulated double wire (two-wire) cord 2, a plug 3 connected to one end of the cord 2, and an outlet 4 connected to the other end of the cord 2. The plug 3 is for insertion into a power outlet to be connected to the power outlet 5. Outlet 4 is the plug 6 of the appliance body
(hereinafter simply referred to as an appliance plug) is for inserting an appliance plug to be connected to the appliance plug, and is provided with an outlet electrode part 7 and a sounding device 8.

FIG. 2 shows a specific example of the outlet 4 with the lid of the casing 9 removed, which is passed through two through holes and assembled with threaded rods and nuts.

The inside of the housing 9 is partitioned by a partition wall 91 into a connection port 92 side and a cord outlet 93 side. Connection port 9
The outlet electrode part 7 is arranged on the second side (lower side in the figure). On the other hand, the sound generating device 8 is arranged on the cord pullout port 93 side.

The electrode part 7 includes a permanent magnet 10 stored in a recess between the connection ports 92, two outlet leaf spring electrodes 11 arranged corresponding to the connection ports 92, and one leaf spring electrode 11 (the right side in the figure). ) connected to rod 1
2. The end face of the yoke that is attracted to the magnetic pole of the magnet 10 protrudes slightly from the outer surface of the housing 9 and is strongly attracted to the magnetic material (such as an iron plate) provided on the appliance plug 6 to ensure the connection between the outlet 4 and the appliance plug 6. to be maintained.

As shown in FIG. 3, the leaf spring electrode 11 has a flexible part bent into a U-shape, with a contact 13 fixed by bending one end of a springy band-shaped electrode plate at a substantially right angle, and a slit 112 formed in the middle part. 111. This plate spring electrode 11 is connected to the connection port 9
2 with the contact 13 facing each other, the flat end 113 on the side where the contact 13 is not provided was fitted into the recess 94 of the partition wall 91, and the intermediate part was inserted between the protrusions 95 and 96 provided on the inner bottom of the housing 9. It is stored in the casing 9 in this state. The cord 2 and the lead wire of the sound generating device 8 are connected near the flat end 113 by soldering.

The rod 12 is a square rod made of an insulating material such as an insulating resin. An H-shaped connecting piece 121 is integrally provided at one end of the rod 12 and connected at its outer center. The other end 12 of the rod 12
2 has a shape bent at right angles in two stages.
The rod 12 has the front half of the connecting piece 121 connected to the flexible part 111.
Pass the rod 12 through the slit 112 from the inside of the
The cord is connected to the curved part on the contact 13 side by sandwiching the electrode between the two forks of the connecting piece 121, and the end 122 passes through the groove 97 of the partition wall 91 and the groove 98 of the projecting piece 96, and the cord is drawn out beyond the partition wall 91. Mouth 9
It is stored on the 3rd side.

The sounding device 8 includes a sounding circuit board 81 and a sounding body 82. The board 81 is arranged at the inner bottom of the housing 9 on the cord outlet 93 side. Pronunciation body 8
2 is made into a cylindrical shape by a case and a diaphragm (both not shown). The diaphragm is, for example, a brass plate with a piezoelectric material attached to it. This sounding body 8
2 is housed in a predetermined recess of the housing 9 so that the center hole of the sounding body 82 and the end 122 of the rod body 12 face each other as shown in FIG.

When the outlet 4 is not connected to the appliance plug 6,
This is the state shown in FIGS. 2 and 3. The end of the leaf spring electrode 11 on the contact 13 side contacts the inner wall of the connection port 92, the flat end 113 engages with the recess 94, and the leaf spring electrode 11 is in an extended state, and the end 122 of the rod 12 is located outside the case of the sounding body 82 and is spaced from a diaphragm (not shown) inside the sounding body 82.

Now, when the plug 3 is connected to the power outlet 5, the sounding device 8 is energized, the diaphragm of the sounding body 82 vibrates, and the sounding body 82 makes a sound. Next, when the outlet 4 is connected to the appliance plug 6 by suction, the plug electrode (not shown) of the appliance plug 6 pushes the contact 13 into the housing 9 as shown by the chain line in FIG.
The flexible portion 111 of the leaf spring electrode 11 is reduced as shown in FIG.
The rod 1 is moved toward the sounding body 82 by the amount of displacement at that part.
The end portion 122 of the second end comes into contact with a diaphragm within the sounding body 82 to prevent the sounding body 82 from vibrating.

[Effect of idea]

As explained above, the power cord according to the present invention uses the sounding device to notify that the outlet of the electric cord is energized and disconnected from the appliance plug, thereby preventing electric shock at the outlet of the power cord for electric appliances. can be prevented.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of a power cord for an electrical appliance according to an embodiment of the present invention, Fig. 2 is a plan view showing a specific example of an outlet used in the present invention, excluding the lid of the housing, and Fig. 3 is the leaf spring electrode in Fig. 2,
FIG. 4 is a perspective view showing the arrangement of the rod and the sounding body, and is an explanatory diagram of the operation of FIG. 3. DESCRIPTION OF SYMBOLS 1... Power cord, 2... Insulated double wire cord, 3... Plug, 4... Outlet, 5... Power outlet, 6... Appliance plug, 7... Outlet electrode part, 8... Sound generating device, 9 ...Housing, 10
...Permanent magnet, 11 ... Outlet leaf spring electrode,
12...rod, 13...contact, 82...sounding body,
91... Partition wall, 111... Flexible portion, 121... Connecting piece.

Claims (1)

[Scope of utility model registration request] An electrical appliance in which a plug for plugging into a power outlet is connected to one end of the cord, and a receptacle for plugging into an appliance plug, which has a permanent magnet for attracting appliances and a retractable leaf spring electrode inside the housing, is connected to the other end. A power supply cord for an electric appliance, characterized in that a sounding device is disposed within the housing of the outlet, and a rod is provided that interlocks with the leaf spring electrode and can come into contact with a diaphragm of the sounding device. code.