JPS6119025A - Method of producing fuse - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field to Which the Invention Pertains] The present invention relates to a method for manufacturing a fuse, and in particular to a method for manufacturing a fuse, which enables a linear or band-shaped fuse element to be easily and accurately supplied to a predetermined position on a fuse mounting base. This invention relates to a method for manufacturing fuses.

[Prior art and its problems]

Circuits on printed circuit boards include fuses that cut off the circuit and protect electronic components on the circuit when an overcurrent flows. The fuses used in printed circuit boards are extremely thin and short, and the technique of manually welding each fuse element to the circuit one by one is troublesome and has poor workability. A wire bonding method is considered as a means for bonding this type of fuse element, but the wedge method, nail hem method, and ultrasonic crimp method all have the disadvantage of being relatively expensive because they require expensive equipment.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for manufacturing a fuse in which a thin and short filter element can be easily aligned and welded to a predetermined position in a circuit on a printed circuit board using inexpensive equipment. .

[Key points of the invention]

In order to achieve this object, the present invention provides a carrier tape having a plurality of openings formed in a row at a predetermined pitch, and a long fuse extending across the openings at approximately the center of the carrier tape. After joining the elements and positioning one of the fuse elements on the opening of this carrier tape over the joining terminal on the fuse mounting base, both ends of the fuse element are welded to the joining terminal and the fuse element is placed in the specified position. It is designed to be cut to length.

[Embodiments of the invention]

Embodiments of the method for manufacturing a fuse according to the present invention will be described above with reference to the drawings.

Figure 2 shows fuse element 1 and carrier tape 2 for temporarily holding fuse element 1.
The carrier tape 2 is coated with an adhesive substance such as an adhesive on one side. Instead of applying an adhesive, the tape itself can be made of a thermocompression bondable material 4). In the carrier tape 2, a large number of circular openings 3.3, . . . 3 are perforated in a straight line -L at a constant pitch P. The shape of this opening 3 is not limited to a circular hole, but may be various shapes such as a square hole or a hexagonal hole.

However, fuse element 1 is connected to this carrier tape 2.
affixed along the center line of the entire width of the

On the other hand, FIG. 3 shows an example of a fuse mount 4 mounted on a printed circuit board, and the top surface of this fuse mount 4 is provided with a joining terminal 5.5 for joining a fuse. On the other hand, two plugs 6.6 are protruded from the bottom. The fuse element 1 is passed between the connecting terminals 5 and 5, and both ends are welded together.

FIG. 1 shows the state in which a fuse element 1 is joined between the joining terminals 5.5 of a fuse mount 4 by carrying out the method of the invention. In the figure, the fuse mount 4 is fed in the direction of arrow A, while the carrier tape 2 is fed in the direction of arrow B, which is perpendicular to this direction of entry. In FIG. 1, a carrier tape 2 is placed on a fuse mounting base 4 to which a fuse element 1-1 is to be bonded. At this time, it is important that the fuse element 1, which is pasted across the opening 3, is correctly positioned between the joining terminals 5. Under this condition, a welding machine (not shown) is used to connect point m and n.
Spot weld the points. At the same time or slightly after this welding, the fuse element is cut to a predetermined length.

Thereafter, the fuse mount 4 is sent in the direction of arrow A, and the subsequent fuse mount 4 is set to the working position, while the carrier tape 2 holding the fuse element 1 is also sent one pinch in the direction of arrow B. Enter the next work setup and enable mass production.

During this time, both ends of the carrier tape 2 may be wound around a reel, or may be held using a suitable gripper.

Fig. 4 shows another embodiment of the present invention, in which pilot holes 8, 8, . . . 8 are formed on both sides of the carrier tape 2 at positions corresponding to the centers of the openings 3, 3, . . Since the pilot holes 8 are bored on both sides of the opening 3, when the pair of pilot holes 8.8 facing each other in the width direction are brought closer together in the direction of the arrow, as shown in FIG. It is possible to join the parts with some slack.

In the above embodiment, each opening 3 of the tape carrier 2 is laid out so that one fuse element 1 crosses it; however, the invention is not limited to this, and two or more fuse elements 1 can be laid across each opening 3 of the tape carrier 2. In this case, multiple fuse elements can be installed at the same time.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a linear or strip-shaped fuse element is held across the opening of the carrier tape, so that by moving the carrier tape, the fuse element can be connected to the circuit of the printed board. It can be easily positioned at a predetermined position inside, which is convenient for automating the fuse installation work.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the installation of a fuse element (=1 operation) showing an embodiment of the present invention, Fig. 2 is a perspective view showing a carrier tape to which the fuse element is attached, and Fig. 3 is a perspective view showing the fuse element. Perspective view showing an example of the mounting base, No. 4
The figure is a plan view showing another embodiment of the present invention in which the fuse element is joined with slack. 1.Fuse element, 2.Gear rear tape, 3.Opening, 4.Fuse mounting base, 5.Joining terminal, 8.Pilot hole.

Claims (1)

[Claims] A long fuse element is bonded to approximately the center of a carrier tape in which a large number of openings are formed in a line at a predetermined pitch so as to cross the openings, and a fuse element on the opening of this carrier tape is formed. After one of the elements is positioned on the joint terminal on the fuse mounting base, both ends of the fuse element are welded to the joint terminal and the fuse element is cut to a predetermined length. A method for manufacturing fuses.