JPH049716Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to improvement of a temperature-sensitive element for electrical equipment.

<Prior art and problems> Temperature fuses are installed to protect electrical equipment, such as transformers, and when the maximum permissible current flows through the electrical equipment or the equipment temperature reaches a predetermined temperature due to an increase in environmental temperature, the Thermal elements may be activated to cut off power to electrical equipment.

By the way, when attaching a temperature sensing element to an electrical device, the electrical device may be provided with a pin terminal and the lead wire of the temperature sensing element may be connected to this pin terminal.In this case, the soldering method may have an adverse effect on the temperature sensing element. Therefore, the use of a soldering-free method is required in order to reduce the cost of the process. Conventionally, a socket method and a binder method have been proposed, but these methods are problematic in that they are complicated in structure and operation.

<Purpose of the invention> An object of the invention is to provide a temperature-sensitive element for electrical equipment that is simple in structure and operation and that can be connected to equipment without soldering.

<Structure of the invention> The temperature sensing element for electrical equipment according to the invention has a lead wire of the temperature sensing element embedded in an insulating plate provided with a hole, and a tip of the lead wire exposed on the inner surface of the hole. This structure is characterized in that a pin terminal of an electrical device (including parts; the same applies hereinafter) is inserted into the hole, and the pin terminal and the tip of the lead wire are brought into contact with each other.

<Explanation of Examples> The present invention will be explained below with reference to the drawings.

FIG. 1 is a top view showing a temperature sensing element for electrical equipment according to the present invention, and FIG. 2 is a cross-sectional view taken in FIG. 1.

In FIG. 1 and FIG. 2, 1 is a temperature sensing element;
For example, the temperature fuse 2, 2 is a lead wire of the temperature sensing element 1, and a flexible copper wire can be used. 3 is an insulating plate with pin insertion holes 4, 4
It is equipped with Lead wires 2, 2 of the above temperature sensing element 1
is buried in this insulating plate 3, and the lead wire tip portion 20 is exposed on the inner surface of the hole. The lead wire tip 20 exposed on the inner surface of the hole is brought into electrical contact with a pin inserted into the hole as described later. In order to increase this contact area, it is desirable to flatten the lead wire tip 20.

FIG. 3 shows the temperature sensing device of the present invention connected to electrical equipment. In Fig. 3, 5 and 5 are pin terminals installed in the electrical equipment, and are present in series in the electrical equipment circuit (for example, if the electrical equipment is a transformer, they are connected in series in the primary coil or secondary coil). ). A is a temperature sensing element according to the present invention, in which holes 4, 4 of an insulating plate 3 are connected to pin terminals 5,
5, and the tip of the lead wire is electrically connected to the pin terminal.

For the above-mentioned insulating plate, it is desirable to use rubber or a highly elastic plastic such as EVA.EEA to perform the above-mentioned fitting elastically.

In addition, the temperature sensing element itself connected to the electrical equipment is the electrical equipment itself (for example, the outer surface of the coil in the case of a transformer).
It is necessary to set the length of the lead wire appropriately according to the distance from this close contact point to the pin terminal.

<Effects of the invention> The temperature sensing element for electrical equipment according to the invention has the configuration as described above, and the temperature sensing element can be connected between the pin terminals simply by fitting the insulating plate into the pin terminals. Therefore, the temperature sensing element can be attached to electrical equipment with one touch without soldering.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a temperature sensing element for electrical equipment according to the present invention, FIG. 2 is a cross-sectional view taken from FIG. be. In the figure, 1 is a temperature sensing element, 2 and 2 are lead wires, 20 is a lead wire tip, 3 is an insulating plate,
4 and 4 are holes.

Claims (1)

[Scope of utility model registration request] The lead wire of the temperature sensing element is embedded in an insulating plate with a hole, the tip of the lead wire is exposed on the inner surface of the hole, and a pin terminal of an electrical device is inserted into this hole to connect the pin. A temperature sensing element for electrical equipment, characterized in that a terminal and the tip of the lead wire mentioned above are brought into contact.