JPS639095Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a stand-type fuse filled with an arc-quenching agent and used for protecting semiconductors.

[Prior art and its problems]

The fuse is generally used by being attached to a fuse holder that is previously attached to the device and wired. The fuse at this time is a fuse tube with both ends sealed with caps, a fusible material stretched between the caps, and arc extinguishing agent filled.Fuse holders usually have elastic terminal fittings attached to both ends. A fuse is inserted between the terminal fittings, and the elasticity of the terminal fittings holds the fuse and maintains electrical contact between the terminal fittings and the cap. Therefore, if the contact between the terminal fitting and the fuse cap is poor, this part will generate heat when electricity is applied, which may damage semiconductors and other components that are sensitive to heat. In order to eliminate such accidents, fuses as shown in FIGS. 1 and 2 have conventionally been used to protect semiconductors. In FIGS. 1 and 2, 1 is a fuse tube, and 2 is a cap that seals both ends of the fuse tube 1. In FIG. A fusible body 3 is stretched between the two caps, and an arc extinguishing agent 4 is filled around the fusible body 3. Further, one side of a mounting bracket 5 bent into an L-shape is fixed to the outside of the cap 2. Conventionally, this fuse is generally used by being attached to a fuse holder 6 previously attached to the device and connected to a circuit, as shown in FIG. In Figure 3,
The fuse holder 6 has terminals 7 at both ends,
A conductor 8 on the device side is connected to this terminal 7 by a terminal screw 7a. Therefore, it is sufficient to tighten the fuse sufficiently firmly between both terminals 7 with screws 9. 6a is a partition provided on the holder 6 for attaching a large number of fuses to the same fuse holder 6, and 10 is a screw for attaching the holder 6 to the device.

Such a fuse requires a fuse holder to attach the fuse, and since the terminal is attached to the fuse holder, there are disadvantages in that there are a large number of parts such as mounting screws, and a large number of installation steps are required.

[Purpose of invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stand-type fuse that eliminates the above-mentioned drawbacks, reduces the number of parts of the fuse and its fuse holder, reduces costs, and can be installed in a smaller space.

[Key points of the idea]

This device is formed in the shape of a rectangular parallelepiped with an open top and a mounting seat at the bottom, and the upper end surfaces of both walls face a fuse mounting hole that is bored from both diagonal corners of at least one of the upper end surfaces of the peripheral wall toward the bottom surface. an insulating box body having a pair of bosses provided at the center; the insulating box body having a hole that fits into the bosses; one side abutting the opposing inner wall of the insulating box body; a pair of L-shaped terminal fittings protruding from the body to the outside; a fusible body disposed within the insulating box body and stretched between one side of each of the L-shaped terminal fittings;
an arc extinguisher filled in the insulating box, and a lid covering the top of the insulating box, an external conductor being connected to the long side of the L-shaped terminal fitting;
The mounting seat provided at the bottom of the insulating box is directly abutted against the frame for mounting.

[Example of idea]

Next, an embodiment of the present invention will be described in detail based on FIGS. 4 and 5. In FIGS. 4 and 5, 11 is a rectangular parallelepiped-shaped insulating box with a mounting seat 12 at the bottom and an opening at one end, and fuse mounting holes 13 are provided at both diagonal corners of one of the boxes.
Mounting screw holes 15 for the lid 14 of the box body 11 are provided in the end face of the peripheral wall at both corners on the other diagonal. Also, a boss 16 is provided on the end face of one opposing peripheral wall.
is provided, one side of the terminal fitting 17 bent into an L-shape is attached to the inside of the peripheral wall of this surface facing each other, and the other side protrudes outside the box body 11, and the boss 16 is fitted into the hole on the other side. and is positioned. 18 is a terminal screw mounting hole provided in the terminal fitting 17. A fusible body 3 is stretched between one side of each of the opposing L-shaped terminal fittings 17 within the box body 11, and an arc extinguishing agent 4 is filled and fixed around the fusible body 3.
This box body 11 is sealed by tightening a lid 14 with screws 19.

When installing this fuse to semiconductor devices, etc.,
The mounting seat 12 of the box body 11 is brought into close contact with the terminal screw mounting hole 18 for direct mounting on the frame or bulkhead of the device.
It is connected to the conductor by passing a screw through it. The fuse has a rectangular parallelepiped shape and has a mounting seat, so it is firmly fixed. Further, there is no need for a fuse holder or a fuse holder terminal.

[Effect of the invention]

As described above, the stand-type fuse according to the present invention consists of a rectangular parallelepiped-shaped box with an opening at one end, in which the insulator, which houses the fusible material and the arc-extinguishing agent filled around it, has a mounting seat on the outside bottom. The fuse holder is omitted because it can be attached directly to the device. Further, since the fusible body is stretched between the terminal fittings which are bent into an L shape and one side of which is attached to the box body, and the other side of the terminal fittings is connected to the external conductor, the terminal is also omitted. Therefore, it is an excellent fuse that is small, inexpensive, and requires only a small installation space.

[Brief explanation of the drawing]

Figures 1 and 2 show an example of a conventional fuse, with Figure 1 being a plan sectional view, Figure 2 being a side sectional view, Figure 3 being a side view of the fuse attached to a fuse holder, and Figure 4 being a side view of the fuse. 5 shows an embodiment of the stand type fuse according to the present invention, FIG. 4 is a plan sectional view, and FIG. 5 is a side sectional view. 3... Fusible body, 4... Arc quenching agent, 11... Box body,
13... Mounting hole of the box body, 14... Lid, 17... Terminal fitting.

Claims (1)

[Scope of utility model registration request] A fuse mounting hole is formed in the shape of a rectangular parallelepiped with an open top and a mounting seat at the bottom, and is provided at the center of the top end of both walls facing the fuse mounting hole, which is bored from both diagonal corners of at least one of the top end faces of the peripheral wall toward the bottom. an insulating box having a pair of bosses, the insulating box having a hole that fits into the boss, one side abutting the opposing inner wall of the insulating box, and the other side extending from the insulating box to the outside; A pair of protruding L-shaped terminal fittings, a fusible body disposed within the insulating box and stretched between one end of each of the L-shaped terminal fittings, and an arc extinguishing agent filled in the insulating box. and a lid that covers the top of the insulating box, an external conductor is connected to the other side of the L-shaped terminal fitting, and a mounting seat provided at the bottom of the insulating box is directly attached to the frame. A stand type fuse characterized by being mounted in contact with each other.