JPS5810313Y2 - plug connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plug connector used in electric heating appliances such as electric hot plates.

The structure of a conventional plug-in connector is that two connecting pins are provided at the tip of a sheathed heater that is attached to the main body by methods such as brazing or casting, and these connecting pins are connected to an automatic temperature controller, power cord, plug, etc. By inserting a thermo plug consisting of a blade into the two pin receivers, electricity is supplied to the main body and the temperature is adjusted.

However, due to variations in the lengths of the left and right sides of the heater, it is unavoidable that the lengths of the connecting pins will be uneven on the left and right sides.

In this case, if the user uses the thermo plug without fully inserting it, the longer connecting pin and pin holder will be in contact with the blade, but the shorter connecting pin and pin holder will cause poor contact with the blade. During this time, arcs may occur or large contact resistance may occur, causing local heat generation.

This invention was developed to deal with the above situation, and its purpose is to prevent local heat generation by not turning on electricity when the plug is insufficiently plugged in, and to remind the user to make sure the plug is fully plugged in. Our goal is to provide an easy-to-use, safe plug-in connector.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, which are examples of the present invention.

In FIG. 1, 1 is the main body of an electric heating device such as an electric hot plate, 2 is a plate, 3 is a temperature-sensitive pipe provided so as to be in contact with the bottom surface of the plate 2, 4 is a heater, and 5 and 6 are both ends of the heater 4. This is a connection pin provided on the

Both connecting pins 5 and 6 have a slightly longer protruding length,
An insulating portion 7 is provided at the tip of the shorter connecting pin 6 by insert molding (see FIG. 4).

8 is a thermo plug (see Figures 2 and 3), with a temperature sensing rod 9 protruding from the center, and metal fittings 10 and 11 for pin holders on both sides.
This is provided.

12 is a dial, 13 is a pilot lamp, 14 is a power cord, and 15 is a stopper.

When the thermo plug 8 is inserted into the main body 1, the temperature sensing rod 9 is inserted into the temperature sensing pipe 3, and the connecting pins 5, 6
The pin receiver of the thermo plug 8 is inserted into the blade 10°11.

The operation at this time will be described in detail with reference to FIGS. 5 and 6.

First, the longer connecting pin 5 is inserted into the blade 10 and the two are electrically connected, and the shorter connecting pin 6 is inserted into the tip of the blade 11. It begins to spread (see Figure 5).

At this time, the largest insertion force is required, but since the blade 11 of the pin holder has not yet contacted the conductive part of the connecting pin 6,
No electricity.

Even if insertion is stopped in this state, there is no need to worry about arcing or local heat generation.

Furthermore, when the thermo plug 8 is inserted, the pin holder will move to the blade 11.
The tip of the connecting pin 6 crosses the insulating part 7, and the conductive part of the connecting pin 6 and the pin receiver are energized by the blade 11, and the connecting pin 6 and the pin receiver are inserted deep into the blade 11 due to the inertial force at the time of insertion.

Therefore, the user can know that the power has been turned on when the plug feels light when inserted.

In the above embodiment, an insulating portion is provided at one end of a pair of connecting pins, but an insulating portion may be provided at both ends of the connecting pin.

As described above, in this invention, the tip of the connecting pin is made of an electrical insulator, so when the connecting pin is inserted into the blade, it does not conduct electricity, and the pin holder does not conduct electricity when the blade is completely expanded. energize only at times, i.e. in areas where large insertion forces are no longer required.

Therefore, an extremely safe plug-in connector can be obtained without causing arcing due to poor contact or local heat generation due to contact resistance as in the conventional case, and encouraging the user to fully insert the connector.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional plan view of an electric heating appliance equipped with a plug connector according to the present invention, Fig. 2 is a partially sectional plan view of a thermo plug, Fig. 3 is a front view of the thermo plug, and Fig. 4. ~FIG. 6 is an explanatory view showing how the connecting pin and the pin receiver are inserted into the blade. 1... Electric heating appliance body, 5, 6... Connection pin, 7... Insulation section, 8... Thermo plug, 10, 11... ...The pin holder is a blade.

Claims (1)

[Scope of utility model registration request] In a plug-in connector in which a pair of connecting pins are electrically connected by inserting the connecting pin and the corresponding pin receiver into a blade, the tip of at least one of the connecting pins is made of an electrical insulator. A plug connector featuring: