JP3183873U - High interrupt indication cylindrical fuse - Google Patents

Abstract

A high-interruptible display-type cylinder in which an element and an arc-extinguishing agent are arranged in a heat-resistant insulating material fuse cylinder and a display mechanism device for confirming the presence or absence of fusing can be smoothly operated in the arc-extinguishing agent filled state Provide a fuse.
A movable body in which a coil spring 5 and a display pin 6 are joined to a hole on an end face of a first cap 2 made of one conductive material and a resistance thin wire 7 is connected to a terminal portion is formed in the sleeve. A display mechanism device in which the copper strip 9 locked to the front end of the sleeve and the heat-resistant coated tube 10 covered from the rear end are integrally joined to the hole on the end face of the first cap with solder, The element 4 is joined to the end portion of the copper strip by soldering and bonded to one side of the fuse cylinder 1. The fuse cylinder is filled with the arc-extinguishing agent 11, and the second cap 3 is covered from the other side. The element inserted through the hole in the end face and the resistance thin wire are pulled and fixed by soldering to smooth the operation of the display pin. .
[Selection] Figure 3

Description

The present invention relates to a display-type cylindrical fuse that can be used to instantly confirm whether or not the circuit is blown by a fuse having a high breaking capacity used in an electric circuit.

Conventionally, display-type fuses are mostly small-sized buses used in circuits for electronic devices, etc., and the breaking capacity is extremely small. Has been.
However, if the electric circuit has a large short-circuit current or the like generated when the electric circuit is short-circuited, such as a wiring system, a fuse having a large breaking capacity is required. Under such circumstances, a cylindrical fuse having a high breaking capacity is generally used. However, there are very few blown indication type fuses of such a high breaking capacity cylindrical fuse in the market, and an example is shown in FIG. The figure (A) shows a display fuse (Y) joined in parallel with a cylindrical fuse (X) with a high breaking capacity, and (B) shows a depression formed on the surface of the cylinder part of the cylindrical fuse. There is a material in which a substance (Z) that is chemically discolored by heat is embedded.

The display fuse described above has the following problems.
(1) It is necessary to prepare a display-type fuse separately for the fuse of (a), and it takes time to install it.
(2) Since the fuse of (b) has only one recess in the cylinder portion, it is necessary to install the fuse so that it is always located in front of the fuse holder when attached to the fuse holder, which makes the inspection operator nervous.
In addition, it has been difficult to produce a high-breaking-capacity display type fuse until now, and there is a concern that the arc-extinguishing agent inside the cylinder may enter the fusing display mechanism and cause an abnormal operation.

The present invention has been made to eliminate the above-mentioned problems caused by the prior art, and a fusing mechanism device is arranged in parallel with the element so that the arc-extinguishing agent filled in a single fuse cylinder does not enter. It is an object of the present invention to provide a cylindrical fuse that can indicate fusing and maintain a high breaking capacity by filling with an arc extinguishing agent.

In order to achieve the above-described object, in the present invention, a coil spring and an indicator pin are joined inward so as to be engaged with a hole in the end face of the first cap made of one conductive material, and a resistance is provided at this end portion. A movable body to which a thin wire is connected is formed in a sleeve made of a conductive material, and a copper strip locked to the front end portion of the sleeve and a heat-resistant coated tube covered from the rear end portion are integrally formed. The mechanism device and the first cap made of the one conductive material are joined to the hole of the end face of the solder by soldering, the element is joined to the end of the copper strip by soldering, and this is bonded to one of the fuse cylinders, The fuse cylinder is filled with arc-extinguishing agent and covered with a second cap from the other, and the element and resistance thin wire inserted through the hole on the end face are pulled and fixed by soldering to smooth the operation of the display pin. Made

In the display mechanism device, the movable part in the axial direction of the display pin is completely sealed with the adherent tube, so that the arc-extinguishing agent for filling does not flow in, and the display pin protrudes to the outside during fusing. Will be smooth.

An exploded perspective view of a display function device member used in the present invention product Partial cross-sectional perspective view of the display function device assembly used in the present invention product Complete sectional view of this product Conventional high breaking capacity display type fuse

Since the fuse body has a single structure, there are no restrictions such as separately attaching a display-type fuse, an indicator, or the like, or directing the fusing display portion directly in front, thereby facilitating maintenance.

Hereinafter, the present invention will be described based on examples.
FIG. 1 is an exploded perspective view of a display function device member used in the product of the present invention. In this figure, 5 is a phosphor bronze coil spring, 6 is a display pin made of a brass bar with a protruding end, and 7 is a display pin. Resistance wire made of advance, 8 is a brass pipe-shaped sleeve, 9 is a copper strip having a hole 9a at one end, and a small hole 9b on its extension, 10 is a bottomed body made of a molded body covering the 8 sleeve It consists of a deposition tube having a small hole 10a on its bottom surface.

FIG. 2 is a partial cross-sectional perspective view of the display function device assembly used in the present invention product.
As an assembling procedure, 6 display pins combined with 5 coil springs are accommodated in 8 sleeves, and 7 resistance thin wires are joined to the small holes 6 a of 6 display pins with solder 20. Next, the end of the sleeve 8 (on the side of the resistance thin wire 7) is inserted into the hole 9a at one end of the copper strip 9 and brought into close contact therewith. Further, in this state, the display function device unit in which the respective members are integrated is configured by pushing the 10 adherent tubes into the 8 sleeves while being inserted from the end portions of the 7 resistance thin wires.

FIG. 3 is a completed cross-sectional view of the product of the present invention. In the inside of one tube of the unfused fuse, 4 elements and 7 resistance thin wires are securely embedded by the filled arc-extinguishing agent 11. The movable part that performs the operation is held in a sealed state by 10 adherent tubes. Therefore, the movable part that performs the display operation is not affected by the contraction force of the coil spring 5 due to the inflow of the arc-extinguishing agent 11, and can be operated while maintaining a constant contraction force. In addition, since there is a difference in the electric resistance value between the 4 element and the 7 resistance wire, current always flows to the 4 element having a smaller electrical resistance value, and almost flows to the 7 resistance wire. Since there is no element, this will not blow out before the element 4.
That is, in the fusing order on the circuit, after the element is first blown, the resistance thin wire is blown behind by the voltage applied between both terminals of the fuse, and the display pin is not blown earlier than the element.

In the present invention, as shown in the above-described embodiments, a display function device unit and an element are arranged together with an arc-extinguishing agent in a single-structured cylinder so that a high-breaking capacity and reliable fusing display can be performed. This is a fuse.

DESCRIPTION OF SYMBOLS 1 Fuse cylinder 2 1st cap 3 2nd cap 4 Element 5 Coil spring 6 Display pin 7 Resistance thin wire 8 Sleeve 9 Copper strip 10 Adhering tube 11 Arc-extinguishing agent 20 Solder

Claims (1)

A fuse cylinder (1) made of a heat-resistant insulating material and an element (4) in the inside thereof together with an arc extinguishing agent (11) are disposed, and first caps (2) made of a conductive material are bonded to both ends in the axial direction. In the high interruption cylindrical fuse formed by joining the element (4) with the solder (20), the inner portion is fixed to the hole (2a) on the end face of the first cap (2) made of the one conductive material. A movable body in which a coil spring (5) and an indicator pin (6) are conjugated to each other and a resistance wire (7) is connected to the end portion (6a) is formed in a sleeve (8) made of a conductive material; The display mechanism device (A) formed integrally with the copper strip (9) locked to the front end of the sleeve (8) and the heat-resistant adherent tube (10) covered from the rear end is provided on the one side. Solder (in the hole (2a) on the end face of the first cap (2) made of a conductive material ( 0), the element (2) is joined to the end of the copper strip (9) with solder (20), this is bonded to one of the fuse cylinders (1), and the inside of the fuse cylinder (1) Fill the arc-extinguishing agent (11) and cover the second cap (3) from the other, pull the element (4) and the resistance wire (7) inserted through the hole (3a) on the end face, and solder this 20) A high interruption display type cylindrical fuse characterized by being joined and fixed in 20).

Images