JPS5841710Y2 - small fuse - Google Patents

Description

[Detailed description of the invention] This invention relates to a small fuse, and more specifically, electrodes and fuse links connecting the electrodes are formed on both the front and back surfaces of the support member and the side surface in contact with these surfaces by vapor deposition or etching. It concerns small fuses.

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 much larger than that, and it is difficult to assemble automatically, which necessitates manual assembly.The manufacturing cost is high, and wires break due to mechanical rather than electrical factors. In order to eliminate this drawback, there is a compact plug-in fuse described in U.S. Pat. No. 3,909,767 in which the plug-in terminal and the fuse link are integrally formed. When making a fuse with a small rating, the fuse link part tends to break during processing, making handling difficult.

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 feature is that a pair of approximately inverted Y-shaped electrodes are provided on both the front and back surfaces of a rigid, approximately U-shaped electrically insulating carrier. are provided facing each other, and connect the electrode on the side surface and the front or back surface of the carrier, and a fuse link part that connects the electrode across the front and back of the carrier, and connects the electrode on one surface of the carrier. A small fuse is characterized in that a two-pronged fuse plate is formed by forming a connecting link part by means such as etching, and the fuse plate can be used by being inserted interchangeably into sockets of different types. This is what we provide.

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

In Fig. 1 a, l), a fuse forming body 1 consisting of terminal parts 1a, lb and fuse link parts 2a to 2e is made of Bakelite, a glass fiber-filled epoxy resin board, a heat-resistant mylar sheet, etc. similar in shape to the above two parts. The above-mentioned fuse forming body is attached to both sides of a heat-resistant carrier 4 made of a strip of Bakelite, an epoxy resin plate, a mylar sheet, etc., by means described later. 1 is formed by the means described later, and the terminal portion 1 is constructed as shown in FIG.
gripping portions 4 a and 4 b are provided by extending the left and right end surfaces of a and lb from the upper surface of the carrier 4 in a protruding manner.

As shown in Fig. 2, these small fuses are heated by thermal radiation by placing a substrate microphone on one side of a rigid carrier 4 made of a heat-resistant insulating substrate such as ceramic or an epoxy resin plate.
Metals such as zinc and tin are vapor-deposited using a thin film forming apparatus using vapor deposition methods such as electron beam heating, flash, ion beam, and electron beam excitation, or sputtering methods such as glow discharge, bias, and asymmetrical alternating current, and terminal portions 1a and 1b are formed. A grip part 16 is provided in the form of a fuse forming part 14 consisting of fuse link parts 2a to 2e which are connected to each other and have a cross-sectional area corresponding to the rated current for fusing.

As shown in FIG. 3, this small fuse is constructed by inserting the terminal portions 1a and lb of the fuse forming portion 14 into contact with the elastic contact pieces 25a and 25b of the socket 24, and then inserting the terminal portions 26a and 26b of the socket. Furthermore, the fuse of this invention as shown in FIG. 2 can be used between the contact pieces 6 a and 6 b of the socket 5 having elastic contact pieces 6 a and 6 b as shown in FIG. 4 a. When the terminal portions 1a and 1b formed on the front and back sides of the carrier 4 are inserted and used, 5a of the elastic contact pieces (7) 6a and 6b,
Since the comrades 5a, 6b, and 6b are connected to each other, when an overcurrent flows between the terminal portions 7a and 7b, two of the link portions 2, 2a, and 2b are mainly fused.

In addition, when the terminal portions 1a and lb are inserted between the left and right elastic contact pieces 6°6 as shown in FIG. When an overcurrent flows, mainly the link portions 2 a and 2 b of the link portions 2 , 2 a , and 2 b are fused.

In addition, the shape and length of the left and right link parts 2 a and 2 b of each link part 2, 2 a, and 2 b are such that the shape and length of the left and right link parts 2 a and 2 b are elongated as shown by the chain lines in FIG. 1 and FIG. The design may be appropriately designed to satisfy the provisions of the Electrical Appliance and Material Control Law, such as by forming holes in the corresponding carrier 4.

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

In addition to the above-mentioned vapor deposition method and sputtering method, the fuse forming portion 14 can also be formed by an etching method, a printing method, a conductive coating method, or the like.

As described above, this invention provides a pair of substantially inverted Y-shaped electrodes facing each other on both the front and back sides of a rigid, substantially U-shaped electrically insulating carrier, and A fuse link part connecting the electrodes across the front and back sides of the carrier body and a link part connecting the electrodes on one surface of the carrier body are formed by means such as an etching method. The fuse plate has a forked structure, and this fuse plate can be inserted into different types of sockets with good compatibility, so it can be easily manufactured in large quantities, from small-capacity rated current values to large-capacity rated values. Therefore, it is very inexpensive, mechanically strong, and a particularly flat fuse can be obtained, so it does not take up much space in use, and it has the advantage of being compatible with different types of sockets.

[Brief explanation of the drawing]

Each of the figures shows an embodiment of this invention, and Figures 1a and 1) are perspective views showing the shape of a small fuse;
Fig. 2 is a perspective view of a rigid carrier with a fuse forming part formed and a grip part attached, Fig. 3 is an explanatory view showing the state in which the fuse plate is used, and Figs. 4a and 4. FIG. 3 is a partially cutaway perspective view of different types of sockets. la, lb... terminal section, 2, 2 a, 2 b
...Fuse link part, 4...Carrier, 14...Fuse forming part, 5゜24...
··socket.

Claims (1)

[Scope of utility model registration request] A pair of substantially inverted Y-shaped electrodes are provided facing each other on both the front and back surfaces of a rigid, substantially U-shaped electrically insulating carrier, and a pair of electrodes is provided on the side surface and the front or back surface of the carrier. A two-pronged fuse plate is constructed by forming a fuse link part connecting across the front and back sides of the carrier body and a link part connecting the electrodes on one surface of the carrier body by means such as an etching method. , a small fuse characterized by the fact that this fuse plate can be used by inserting it into sockets of different types with good compatibility.