JP3191325U - Terminal - Google Patents

Abstract

Provided is a terminal that can be mounted on a thin-shaped electric circuit component and can stably flow a large current.
The terminal includes a joining region 11 in which two conductive plates are overlapped and joined, a folding region 12 in which two conductive plates extending from the joining region are bent in opposite directions, and further from the folding region. Two extending conductive plates have a facing region 13 facing each other with a gap between each other, and a through hole 14 formed in at least one of the two conductive plates in the facing region. The electric circuit component is inserted between the two conductive plates in the facing region 13, and the conductive layer and the terminal of the electric circuit component are fixed by solder filling the through hole 14.
[Selection] Figure 1

Description

  The present invention relates to a terminal used for a thin electric circuit component in which a layer of resistance or conductor is formed on an insulating substrate, and enables a large current to flow stably through the electric circuit component.

In recent years, thick film resistors in which a resistive film is formed by printing on the surface of an insulating substrate such as a ceramic plate, and fuses in which a low melting point metal layer is formed between electrodes on the insulating substrate are widely used.
Many of these thin electric circuit components are surface-mounted on a printed circuit board or the like. However, in a substrate fuse or a high power resistor that cuts off a large current, it is necessary to connect a terminal for a large current.
In the following Patent Document 1, a technique of directly welding a connection terminal to an electric circuit component having a thin shape, or making a hole at a terminal mounting position of the electric circuit component and engaging a convex portion of the connection terminal with the hole. Is disclosed.

WO99-18484

  However, in an electrical circuit component using an insulating substrate such as ceramic, it is difficult to firmly weld the connection terminal to the conductive film on the insulating substrate or to form a terminal engagement hole in the insulating substrate.

  The present invention was devised in consideration of such circumstances, and is stably coupled to a thin electric circuit component having a resistance or conductor layer formed on the surface of an insulating substrate. An object of the present invention is to provide a terminal that allows current to flow.

The present invention is a terminal mounted on a thin electric circuit component having a conductive layer for terminal connection formed on the surface of an insulating substrate, and the first conductive plate and the second conductive plate are disposed between each other. A facing region that is opposed to the gap, a first conductive plate and a second conductive plate are joined directly or over each other via a third conductive plate and integrally joined to each other. A through hole formed in at least one of the first conductive plate and the second conductive plate, and the electric circuit component is between the first conductive plate and the second conductive plate in the opposing region. The solder inserted into the through hole and filled with the through-hole is bonded to the conductive layer of the electric circuit component to be fixed to the electric circuit component.
This terminal is stably fixed to the electric circuit component without applying a large mechanical stress to the insulating substrate.

In the terminal of the present invention, the first conductive plate and the second conductive plate in the joining region are directly overlapped and joined, and the first conductive plate and the second conductive plate are interposed between the joining region and the opposing region. A bent region is provided in which the conductive plate is bent in opposite directions.
This terminal can be composed of two conductive plates.

Further, in the terminal of the present invention, the first conductive plate and the second conductive plate in the joining region are made to have a thickness corresponding to the gap between the first conductive plate and the second conductive plate in the opposing region. You may make it join via a 3rd electroconductive board.
By adjusting the thickness of the third conductive plate to the thickness of the electric circuit component to be inserted between the first conductive plate and the second conductive plate in the opposing region, it is possible to make thin shape components of various thicknesses. Applicable.

Moreover, in the terminal of the present invention, it is desirable to form a bulging portion that bulges outward on the first conductive plate and the second conductive plate between the joining region and the opposing region.
Even when the electric circuit component expands in the thickness direction due to heat during energization, damage to the joining region can be avoided by the buffering action of the bulging portion. The shape of the bulging portion is arbitrary. For example, by providing the bulging portion having a cross-sectional arc shape or uneven shape, it is possible to buffer the expansion of the electric circuit component.

Moreover, in the terminal of this invention, the electrically conductive plate of a joining area | region can be joined by spot welding.
Necessary joint strength can be obtained by appropriately selecting the welding location and the number of welds of spot welding.

  The terminal of the present invention can be stably coupled to an electric circuit component having a thin shape and can cause a large current to flow through the electric circuit component.

The figure which shows the shape of the terminal which concerns on embodiment of this invention The figure which shows the state by which the terminal of FIG. 1 was fixed to the thin-shaped electrical circuit component A diagram showing a high power fuse in which the terminal of FIG. 1 is used. The figure which shows the modification of the terminal of FIG. The figure which shows the shape of the terminal which concerns on other embodiment of this invention.

FIG. 1 shows the shape of a terminal according to an embodiment of the present invention. FIG. 1A is a plan view, and FIG. 1B is a side view thereof.
In each terminal 10 forming a pair, a joining region 11 in which two copper plates 101 and 102 are overlapped and joined, and two copper plates 101 and 102 extending from the joining region 11 are in opposite directions (vertical direction in FIG. 1). And two opposing copper plates 101 and 102 extending from the bent region 12 are opposed to each other with a gap 141 therebetween.
Further, through holes 14 for fixing are formed in the copper plates 101 and 102 in the facing region 13, respectively, and mounting holes 15 are formed in the copper plates 101 and 102 in the joining region 11.
The two copper plates 101 and 102 in the joining region 11 are welded at three locations 161, 162, and 163 by spot welding.
The two copper plates 101 and 102 in the facing region 13 have a gap 141 corresponding to the thickness dimension of the thin electric circuit component between them.

  Here, the terminal 10 is composed of two independent copper plates 101 and 102. However, one long copper plate is folded back from the middle, and the folded copper plate is used as two copper plates, so that the joining region 11 The bent region 12 and the counter region 13 may be formed.

The thin electric circuit component to which the terminal 10 is fixed has a conductive layer electrically connected to the terminal 10 on the surface of the insulating substrate.
This conductive layer is a layer on the surface of the insulating substrate formed for the electrodes of the resistance layer and the fuse layer. In addition, the resistance layer or the fuse layer itself on the insulating substrate can be used as a conductive layer for electrical connection with the terminal 10.

As shown in the plan view (a) and the side view (b) of FIG. 2, the thin electric circuit component 20 is inserted into the gap 141 formed by the two copper plates 101 and 102 in the facing region 13, thereby joining the bonding region. 11 is placed in contact with the copper plates 101 and 102. Alternatively, the electric circuit component 20 is provided with a convex portion that defines the amount of insertion into the facing region 13, and the electric circuit component 20 is positioned until the convex portion comes into contact with the ends of the copper plates 101 and 102 in the facing region 13. May be inserted into the gap 141.
The conductive layer on the insulating substrate of the inserted electric circuit component 20 contacts the inside of the copper plate 101 (or 102) in the facing region 13. This conductive layer is formed in advance on the insulating substrate of the electric circuit component 20 so as to overlap the through hole 14 of the copper plate when the electric circuit component 20 is inserted to the positioning position.

Next, solder finishing is performed so that the solder enters the through holes 14 of the copper plates 101 and 102 in the facing region 13, and the solder filling the through holes 14 adheres to the conductive layer on the insulating substrate of the electric circuit component 20. The terminal 10 and the electric circuit component 20 are fixed.
FIG. 3 shows a high power fuse in which a fuse element 30 to which the terminal 10 is coupled is enclosed in an outer tube 32 together with an arc extinguishing agent 31.

The conductive layer of the electric circuit component 20 may be provided on both surfaces of the insulating substrate together with the resistance layer and the fuse layer. In this case, the terminal 10 and the electric circuit component 20 are firmly fixed by solder filling each through hole 14 of the copper plates 101 and 102 in the facing region 13.
When the conductive layer of the electric circuit component 20 is formed only on one side of the insulating substrate, the through hole 14 is provided only on the copper plate on the side facing the conductive layer among the copper plates 101 and 102 in the facing region 13. May be.

The terminal 10 can be attached to the thin electric circuit component 20 without applying a large mechanical stress.
The terminal 10 can flow a large current through the electric circuit component 20 and can maintain a stable coupling state even when the electric circuit component 20 generates heat with a large current.
In addition, since the electric circuit component 20 to be inserted into the facing area 13 of the terminal 10 is guided to the position where it is guided and positioned by the copper plates 101 and 102 in the facing area 13, the insertion work is easy.

The terminal 10 may be formed using a conductive plate other than a copper plate. A plated metal plate can also be used.
Moreover, the welding location of the spot welding which joins the copper plates 101 and 102 of the joining area | region 11, and the number of welding can be suitably selected so that required joining strength may be obtained.
Moreover, you may join the copper plates 101 and 102 of the joining area | region 11 by methods other than spot welding.

FIG. 4 shows a modification of the terminal of the present invention. The terminal 40 includes a bulging portion 41 that bulges outward at a transition location between the two copper plates 101 and 102 that transition from the bent region 12 to the facing region 13. Other configurations are the same as in FIG.
This terminal 40 swells even when the electric circuit component 20 expands greatly in the thickness direction due to heat during energization, and a force that increases the distance between the copper plates 101 and 102 in the facing region 13 is applied. Due to the buffering action of the portion 41, the force does not reach the joining region 11. Therefore, the breakage of the joining in the joining region 11 can be avoided.
In addition, the shape of the bulging part 41 is arbitrary. In FIG. 4, the bulging portion 41 having an arcuate cross section is provided, but the cross section may be uneven.

FIG. 5 shows a terminal according to another embodiment of the present invention. As shown in FIG. 5B, this terminal has a thickness corresponding to the thickness of the electric circuit component 20 between the copper plates 101 and 102 in the joining region 11 (that is, between the copper plates 101 and 102 in the opposing region 13). The three copper plates 101, 102, 103 are joined by spot welding with a copper plate 103 of a thickness corresponding to the gap of Further, a bulging portion 41 is provided between the copper plates 101 and 102 in the joining region 11 and the copper plates 101 and 102 in the facing region 13.
This terminal can be applied to thin-shaped components of various thicknesses by matching the thickness of the copper plate 103 with the thickness of the electric circuit component 20 inserted between the copper plates 101 and 102 in the facing region 13. it can.

  The terminal of the present invention can flow a large current to the electric circuit components to be mounted, and is widely used in various electric circuit components for high power such as a substrate fuse and a high power resistor that cut off the large current. Can be used.

DESCRIPTION OF SYMBOLS 10 Terminal 11 Junction area | region 12 Bending area | region 13 Opposite area | region 14 Through-hole 15 Mounting hole 20 Electrical circuit component 30 Fuse element 31 Arc extinguishing agent 32 Outer tube 40 Terminal 41 Expansion part 101 Copper plate 102 Copper plate 103 Copper plate 141 Space | gap 161 Spot welding Spot 162 Spot weld spot 163 Spot weld spot

Claims (5)

A terminal attached to a thin electric circuit component having a conductive layer for terminal connection formed on the surface of an insulating substrate,
An opposing region in which the first conductive plate and the second conductive plate face each other with a gap between them,
The first conductive plate and the second conductive plate are directly or via a third conductive plate and joined together integrally;
A through hole formed in at least one of the first conductive plate and the second conductive plate in the facing region;
Have
The electric circuit component is inserted between the first conductive plate and the second conductive plate in the facing region, and the solder filling the through hole is bonded to the conductive layer of the electric circuit component. Fixing to the electrical circuit component is performed,
A terminal characterized by that. The terminal according to claim 1,
The first conductive plate and the second conductive plate in the joining region are directly overlapped and joined,
The first conductive plate and the second conductive plate are provided with a bent region that is bent in opposite directions between the joint region and the facing region,
A terminal characterized by that. The terminal according to claim 1,
The first conductive plate and the second conductive plate in the joining region have a thickness corresponding to the gap between the first conductive plate and the second conductive plate in the opposing region. Joined through three conductive plates,
A terminal characterized by that. 4. The terminal according to claim 2, wherein a bulging portion bulging outward is formed in the first conductive plate and the second conductive plate between the joining region and the facing region.
A terminal characterized by that. The terminal according to any one of claims 1 to 4, wherein the conductive plates in the joining region are joined by spot welding.
A terminal characterized by that.