JPS5841713Y2 - small fuse - Google Patents

Description

[Detailed description of the invention] This invention relates to a small fuse, and more specifically, it relates to a pair of small fuses that are folded in half and have an electrode and a fuse link connecting between them formed on one surface of a supporting member by photoetching. It is.

Traditionally, small fuses have generally been made by attaching metal caps to both ends of a cylindrical glass tube, and connecting the fuse inserted into the glass tube to the metal caps by soldering. The volume is inevitably large because it is placed in a glass tube that is sufficiently large compared to the conventional one, and it is difficult to assemble automatically, which necessitates manual assembly, resulting in high manufacturing costs.In addition, wires can break due to mechanical rather than electrical factors. In order to eliminate these drawbacks, there are some devices in which the plug-in terminal and the fuse link are integrally formed, such as the small plug-in fuse described in U.S. Pat. No. 3,909,767. However, when making a fuse with a small rating, the fuse link part tends to break during processing, making it difficult to handle.

In any case, both the former and the latter have drawbacks such as requiring a dedicated fuse socket to mount the fuse, limiting the number of mounting locations, and requiring a fairly large area for mounting.

This invention aims to eliminate the above-mentioned drawbacks, and its first feature is a pair of electrodes on one surface of a flexible electrically insulating carrier and a fuse connected to these electrodes. The link portion as a whole is provided in a substantially mouth shape, and through holes are provided in the carrier surrounded by the electrode and the link portion and facing the link portion to form a unit fuse body. 2 carriers
The purpose is to form a three-pronged fuse plate by folding and holding the palms together, and insert this fuse plate into a socket so that it can be used as a small fuse.

A second feature of this invention is that, in addition to the first feature, a fuse sheet is constructed by arranging a large number of the unit fuse bodies through connecting portions, and when in use, each of the unit fuse bodies is connected to the connecting portion. 2. Separate the support body of the unit fuse body so that the electrode and the link part are on the outside.
To provide a small fuse, which is characterized in that it is folded and held in a folded state to form a two-pronged fuse plate, and can be used as a small fuse by inserting the fuse plate into a socket.

An embodiment of this invention shown in the drawings will be described in detail below.

Figures 1a and 1 show a metal thin plate 12 made of zinc alloy, tin, or aluminum plate attached to the heat-resistant laminate 11 and connected to a pair of electrodes 13a and 13b corresponding to the rated current. A pair of fuse links 14 having a cross-sectional area
．． A fuse forming part 15 consisting of 14 (whose shape is mouth-shaped as a whole) is pasted on a regular length laminate, and through holes 22, 22 are individually provided near the fuse link parts 14, 14 of the laminate 11. The unit fuse body 17 is composed of a large number of unit fuse bodies 17, and as shown in each of the above figures, a large number of unit fuse bodies 17 are connected by the connecting portions 18 of each carrier 16, and as a whole constitutes a fuse sheet S. It is.

The connecting portion 18 is provided with unevenness 16b so that the connecting portion 18 can be separated individually from the cut 19 portion when separated from the connecting portion.

Further, a through hole 20 is provided in the space surrounded by each electrode 13a, 13b so that a three-pronged fuse plate 21 is formed when the carrier 16 is folded in half.

In the above embodiment, the unit fuse bodies 17 are separated from the connecting portions, but the unit fuse bodies may be separated individually in advance.

This unit fuse body has both electrodes 13 as shown in FIG.
Fold in half from the a and 13 b sides to form a unit fuse body 17 as shown in FIG. During this bending, the V-shaped notch 16a of the bent end 13 forms a tapered part, and the edge part is made oblique.

A fuse forming portion 15 is provided on a flexible carrier 16 shown in FIG.
The link portion 14 is provided on the thin plate of the unit fuse body 17 formed with the electrode, and the link portion 14a is formed on the half-folded portion of the electrode, which is then folded in half to form a two-pronged fuse plate 21 for use.

The housing 3 shown by chain lines in FIGS. 4 and 5 is formed by molding a molded synthetic resin, and is used to insert an electrode of the same size as the outer diameter of the electrode into one surface of the gripping portion 31. It has electrode insertion holes 32.

As shown in FIG. 3, the housing 3 configured in this manner is press-inserted into the electrode insertion hole 32 from the lower side of the insertion hole 32, so that the projections and recesses 16b that also serve as a stopper engage with the inner surface of the housing. It can be used as a small plug-in fuse.

In this case, since the electrode is forcibly inserted into the electrode insertion hole that is approximately equal to the external dimensions of the electrode, it is firmly attached to the housing 3, so no adhesive is required.

As shown in FIG. 5, this small fuse has elastic contacts 6, 6 of the socket 5, electrodes 13a of the fuse forming part 15,
13b so that they are in contact with each other, and then
This plug-in type small fuse is used to prevent overcurrent in electrical systems of automobiles, etc. As shown in Fig. 5, a pair of contact pieces 6,
6 is inserted into a fuse socket 5 installed in a housing.

When replacing the housing 3, by holding the grip portion 31 of the housing 3, it can be easily removed from the fuse socket 5 without touching the electrode and link portion.

Next, as shown in FIGS. 3 and 4, the fuse of this invention is inserted into the support 16 between the contact pieces 6, 6 of the socket 5 having the elastic contact pieces 6, 6 as shown in FIG. 6a. When the electrodes 13a and 13b formed on the surfaces of the terminals 7 and 7 are inserted and used, the elastic contact pieces 6 and 6 are connected to each other, so that no overcurrent is generated between the terminal parts 7 and 7. When flowing, each of the link portions 14.14 melts.

In addition, if a display section 10A is attached for displaying characters and colors indicating the current capacity, it will be convenient for use.

Incidentally, the link portion 14.14 may be formed by forming only one link portion 14, but in this case, the other equivalent portions are kept separated.

As described above, this invention provides a pair of electrodes on one surface of a flexible electrically insulating carrier and a fuse link section connected to these electrodes in a generally mouth shape, and is surrounded by the electrodes and the link section. A unit fuse body is formed by forming a through hole in the empty space of the carrier body and facing the link part, and the support body of the unit fuse body is folded in half and held in a state of palms together to form a two-pronged fuse plate. Since this fuse plate can be inserted into a socket and used as a small fuse, it can be manufactured easily and in large quantities from small capacity rated current values to large capacity rated values, making it very inexpensive. It is mechanically strong and has the advantage of being easy to install in a socket without taking up much space.

Furthermore, in addition to the above-mentioned effects, this invention has a second effect, in which a large number of unit fuse bodies are arranged and formed through connecting parts to form a fuse sheet, and when used, each of the unit fuse bodies is separated from the connecting part. Fold the carrier of the unit fuse body in half so that the electrode and link part are on the outside, hold the palms together to form a two-pronged fuse plate, and insert this fuse plate into socket I to create a small fuse. Since it can be used as a rated current value of small capacity to a rated value of large capacity, it can be manufactured easily and in large quantities, making it very inexpensive, mechanically strong, and easily wrapped in a roll. By cutting it and folding it in half when using it, it takes up less space for storage and has the advantage of being compatible with different types of sockets.

[Brief explanation of the drawing]

The figures show one embodiment of this invention, and Fig. 1a is a perspective view of a state in which a fuse forming part is formed on a flexible carrier, and Fig. 1 shows a continuous unit fuse body. FIG. 2 is a perspective view of the unit fuse body in a folded state; FIG. 3 is a perspective view of the unit fuse body folded in half;
FIG. 4 is a perspective view of a unit fuse body with a housing attached thereto, FIG. 5 is a sectional view of the fuse inserted into a socket in use, and FIG. 6 is a partially cutaway perspective view of the socket. 3.23...Housing, 11...Heat-resistant laminate, 12...Metal thin plate, 13a,
13 b... Electrode, 14... Fuse link part, 15... Fuse forming part, 16...
...Carrier, 17...Unit fuse body, 1
7 a, 17 b... edge, 20.22...
...Through hole, 31...Grip part, 21...
...Two-pronged fuse plate, 32...Terminal insertion hole,
5...Socket, 6...Touch piece, 7...
...Socket terminal section, S...Fuse seat.

Claims (2)

[Scope of utility model registration request] (1) A pair of electrodes and a fuse link section connected to these electrodes are provided on one surface of a flexible electrically insulating carrier, and a fuse link section connected to these electrodes is provided in the shape of a mouth as a whole, and a section of the carrier surrounded by the electrodes and the link section is provided. A unit fuse body is formed by providing through holes facing the empty space and the link portion, and a two-pronged fuse plate is constructed by folding the carrier of this unit fuse body in half and holding the palms together in a state. A small fuse characterized by a fuse plate that can be inserted into a socket and used as a small fuse. (2) In the utility model registration claim 1, a fuse sheet is constructed by arranging a large number of the unit fuse bodies via connecting parts, and when in use, the unit fuse bodies are connected to each connecting part. Fold the carrier of the unit fuse body in half so that the electrode and the link part are on the outside, hold the palms together to form a two-pronged fuse plate, and insert this fuse plate into the socket. A small fuse characterized by being able to be used as a small fuse.