JPS6015226Y2 - Straight incision and closure device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a linear cutting and closing device.

In order to reduce the operating force of the linear cutting and closing device, a guide groove is provided in the copper main blade in the direction that divides it into two, and a fulcrum pin is inserted into this groove so that the main blade slides on the fulcrum pin. It is being considered to configure the

However, according to the inventor's experiments, there was a problem in that if the main blade was opened and closed many times, for example, about -10,000 times, the main blade would become galled and could no longer be opened and closed smoothly.

In view of the above points, the purpose of the present invention is to increase the mechanical strength of the sliding portion between the main blade and the fulcrum pin in this type of device, thereby extending its life.

Hereinafter, a case in which the present invention is applied to a load switch will be explained with reference to the drawings.

In Fig. 1, numeral 1 denotes a main blade, which is separated from an iron blade 1a and conductive blades 1b made of copper, brass, etc. that sandwich it from both sides, as is clear from Fig. 2. The opening/closing operation is performed in a linear manner by transmitting force through the insulated operating rod 3.

Reference numeral 4 denotes a fulcrum pin that passes through the support 5 on the hinge side and is inserted into the guide groove 6 of the main blade 1.

The guide groove 6 is for dividing the central part of the main blade 1, that is, the iron blade 1a and the conductive blade 1b, into two parts.

As shown in FIG. 2, the guide groove 6 is provided with iron blades 1a projecting from both sides of the conductive blades 1b, so that the fulcrum pin 4 comes into contact only with the iron blades 1a.

Note that 7 is a support insulator, 8 is a finger contactor, and 9 is a slit-shaped arc extinguishing chamber into which an auxiliary arc blade (not shown) rotatably attached to the main blade 1 enters and exits.

In the above configuration, in order to shift the device from the closing state shown in FIG. 1A to the tripping state shown in FIG. All you have to do is move the blade 1 downward in the figure.

According to the present invention, the main blade is composed of an iron blade and a conductive blade sandwiching the iron blade, and the iron blade protrudes from both sides of the guide groove provided in the main blade in a range where the iron blade slides on the fulcrum pin. Since only the fulcrum pin and the iron blade make sliding contact when the main blade moves, the mechanical strength of this sliding part is significantly improved compared to conventional ones, and the service life can be extended. .

In addition, since the main blade is configured as described above, it can have mechanical strength against the electromagnetic mechanical force that acts in the interphase direction when current is applied for a short time, and the amount of conductive material used is small. This also has the effect of making the device cheaper.

It is not necessarily necessary for the iron blade to protrude from the guide groove over the entire surface of the opposing surface; it is sufficient to have the iron blade protrude only from the surface that makes sliding contact with the fulcrum pin.

[Brief explanation of the drawing]

Figure 1 shows one embodiment of the present invention, A is a side view showing the closed state, and the opening is a side view showing the unloaded state.
It is an enlarged sectional view taken along the -n' line. 1... Main blade, 1a... Curved iron blade,
1b... Conductive blade, 4... Fulcrum pin, 6... Guide groove.

Claims (1)

[Scope of utility model registration request] An iron blade is sandwiched between two conductive blades, and an axial guide groove is provided that divides the central part of both the conductive blade and the iron blade of the main blade into two parts, and a fulcrum is established in this guide groove. A linear cutting/closing device in which a pin is inserted, and the iron blade is made to protrude from both sides at least in the range of the guide groove in which the fulcrum pin moves relatively, and is slid on the fulcrum pin to make a cut.