JPH11204018A - Holding structure for electric part connected to bus bar integrated terminal piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding structure for an electric part connected a bus bar integrated terminal piece and formed to be capable of restraining the resonance point of the connected part due to a vibration, and having a high heat releasing effect. SOLUTION: The ends of an upstream bus bar 11 and a downstream bus bar 12 are formed to have terminal pieces 14 and 15 orthogonal with the surfaces of the tabs 16a and 16b of a connected electric part 16 kept opposite to each other. In addition, nonconductive strips 19 and 20 are bent to form each of independent holding pieces 21 and 22 between terminal pieces 14 and 15 with the surfaces of the strips 19 and 20 kept faced to the surfaces of the terminal pieces 14 and 15 at a prescribed gap. Also, the terminal pieces 14 and 15, and the holding pieces 21 and 22 are respectively formed to have connecting parts 17, 18, 23 and 24 for the tabs 16a and 16b of the electric part 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for holding an electric component connected to a terminal piece formed integrally with a bus bar as an internal circuit in an electric connection box used for interconnecting a wire harness of an automobile or the like. It is.

[0002]

2. Description of the Related Art Conventionally, terminal pieces and electric parts formed integrally with the above-mentioned bus bar have been connected as described below. For example, as shown in FIGS. According to the connection structure proposed earlier and disclosed in Japanese Patent Application Laid-Open No. Hei 9-134752, one end of each of the strip-shaped upper bus bars 1 and 2 made of a good conductive metal is provided with a terminal strip 1 respectively.
a and 2a are formed. A terminal strip 3 is also provided at one end of the band-shaped lower bus bar 3 made of a good conductive metal.
a is formed.

[0003] On the other hand, reference numeral 4 denotes an upper insulating plate, in which upper bus bars 1 and 2 are separately arranged in a plurality of grooves 4a and 4a formed on the upper surface thereof. The terminal strip 1 is made to protrude upward from the upper surface of the plate 4.
In the state where the terminal pieces 1a and 2a face the plate surfaces of the terminal pieces 1a and 2a, the terminal pieces 1a and 2a are arranged with a gap connectable to the plate-like tabs 6a and 6b as terminals of the fuse (electric component) 6 as a connection partner. ing.

[0005] On the other hand, reference numeral 5 denotes a lower insulating plate which is disposed on the lower stage of the upper insulating plate 4 so as to be overlapped therewith. The lower bus bar 3 is disposed in a groove 5a formed on the upper surface thereof, and the terminal strip 3a is connected to the lower insulating plate. The terminal pieces 1a and 2a are projected from the upper surface of the plate 5 through the through holes 4b formed in the upper insulating
The terminal piece 1a is brought close to the terminal strip 1a in a state where it can be connected to one of the tabs 6a of the fuse 6 together with a.

The terminal strips 1a, 2a, 3a have connecting grooves 1c, 1d, 2c, 2d, 3c, 3d at their upper edges and at the plate surface with the tabs 6a, 6b of the fuse 6, respectively. 1b, 2b and 3b are formed.

[0006] In this manner, the connection structure of the fuse 6 to the tabs 6a and 6b is formed, and the fuse 6 is connected to the terminal strips 1a and 2b.
a, 3a, the tabs 6a, 6b are connected to the contact portion 1
c, 1d, 2c, 2d, 3c, and 3d are slidably contacted and pressed outwardly, and the terminal strips 1a, 2a, and 3a forming both sides of the connection grooves 1b, 2b, and 3b are elastically deformed. Push outwards. Then, the contact portion 1c, 1
The connection of the fuse 6 is completed when the tabs 6a and 6b are sandwiched by d, 2c, 2d, 3c and 3d.

The tabs 6a and 6b of the fuse 6 are in contact with the semicircular bottoms of the connecting grooves 1b, 2b and 3b, so that the contact portions 1c, 1d, 2c, 2d, 3c and 3d and the bottoms are formed. It is supported at four contact points per terminal piece and is properly held without play.

[0008]

In the above prior art, the tab 6a of the fuse 6 has two terminal pieces 1a and 3a.
And the tab 6b are connected to the terminal piece 2a. But,
Since the terminal strips 1a, 2a, and 3a are not provided with a structure for sufficiently holding the fuse 6, an electric component having a relatively own weight, such as a relay, is connected, and the tab of the relay is connected, for example, to the connection. If the grooves 1b, 2b, 3b are not sufficiently abutted against the respective bottoms, the holding members for the relays are only the contact portions 1c, 1d, 2c, 2d, 3c, 3d, and the connection portions of the relays due to vibrations The problem is that the resonance point becomes large.

That is, one tab 6a of the relay is connected to the contact portions 1c, 1c of the two terminal pieces 1a, 3a arranged close to the center axis of the one tab 6a (see FIG. 6).
d, 3c, and 3d, and the other tab 6b is connected only by the contact portions 2c, 2d of the terminal piece 2a, so that the resonance point of the connection portion of the relay due to vibration increases. .

On the other hand, each contact portion 1c, 1d, 2c, 2d,
Since the current density in 3c and 3d is large, the fuse 6 (or the electric component such as the relay) is connected to the terminal strips 1a, 2a and 3a.
After the connection, the temperature of the terminal strips 1a, 2a, 3a and the tabs 6a, 6b rises when the power is supplied.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a structure for holding an electric component connected to a bus bar-integrated terminal piece that suppresses a resonance point of a connection portion due to vibration and has a high heat radiation effect. As an issue.

[0012]

According to a first aspect of the present invention, there is provided a holding structure for an electric component connected to a bus bar-integrated terminal strip, comprising an end of an upstream bus bar and an end of a downstream bus bar. In the part, form a terminal piece that is orthogonal to the tab plate surface of the electrical component to be connected, and each plate surface faces each other, and between the terminal pieces, bend a band-shaped plate without electrical conduction Independent holding pieces are provided so that the plate surface of the band-shaped plate faces the corresponding terminal piece at a predetermined distance from the corresponding plate surface, and the terminal pieces and the holding pieces each have a connection portion into which a tab of an electric component fits. It is characterized by doing.

In the above structure, the holding structure of the electric component connected to the terminal piece is provided at the ends of the upstream bus bar and the downstream bus bar at right angles to the tab plate surface of the electric component to be connected and at the respective plate surfaces. Forming terminal pieces facing each other, between the terminal pieces, bending a band-shaped plate having no electrical conduction, and the plate surface on the band-shaped plate side faces the plate surface of the corresponding terminal piece at a predetermined interval. Independent holding pieces are provided, and the terminal piece and the holding piece are each formed with a connection portion to a tab of an electric component. If such a holding structure is adopted, each tab of the electric component as the connection partner fits into the connection portion between the corresponding terminal piece and the holding piece, and is directly driven by the elasticity of the terminal piece and the holding piece for each tab. Since the connection is established, the electric components can be sufficiently held, and the resonance point of the connection portion due to vibration can be suppressed. In addition, since the holding piece is not electrically connected, it serves as a heat radiating plate for the terminal piece and the tab, thereby suppressing a rise in temperature. Furthermore, since it can be manufactured simply and inexpensively, there is no need to use complicated and expensive members such as female-female relay terminals. Also, the actual length of the busbar can be shortened,
Routing space can be reduced.

According to a second aspect of the present invention, there is provided a holding structure for an electric component connected to the bus bar-integrated terminal strip according to the first aspect of the present invention, wherein The predetermined interval is formed so that the terminal piece and the holding piece substantially coincide with the trisection axis of the tab of the corresponding electric component.

In the above configuration, the predetermined interval between the terminal piece and the holding piece is formed such that the terminal piece and the holding piece substantially coincide with the trisection axis of the tab of the corresponding electric component. If the distance between the terminal piece and the holding piece is formed so that the terminal piece and the holding piece substantially coincide with the trisection axis away from the center axis of the tab, not only the heat radiation property but also the holding force is improved. However, it is possible to sufficiently cope with a torsional vibration mode.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a holding structure of an electric component connected to a bus bar-integrated terminal piece of the present invention. FIG. 2 is a schematic view showing the connection and holding state of FIG. 1, and FIG. 3 is a front view including a partial cross section of FIG.

In FIGS. 1 to 3, reference numeral 11 denotes an upstream bus bar as an internal circuit in an electric connection box used for interconnecting a wiring harness of an automobile.
Reference numeral 2 denotes a downstream bus bar as the internal circuit.
Both the upstream busbar 11 and the downstream busbar 12 are formed by stamping a good conductive metal into a strip by pressing.

Reference numeral 13 denotes an insulating plate (see FIG. 3).
An upstream bus bar 11 and a downstream bus bar 12 are accommodated and arranged in a plurality of grooves 13a (see FIG. 3) formed on the upper surface of the insulating plate 13 (the upper side is the upper surface with respect to the drawing).

Upstream bus bar 11 and downstream bus bar 1
Terminal pieces 14 and 15 that protrude upward (the upper side is the upper side with respect to the drawing) are bent at the respective ends of 2. The terminal strips 14 and 15 are, for example, a relay 16
(Corresponding to the electric parts described in the claims) The tabs 16a, 16b as connection terminals of the plate-like tabs 16a, 16b are orthogonal to the plate surfaces and have a connectable interval. They face each other with their plate surfaces facing each other.

The terminal pieces 14 and 15 are formed with connecting grooves 17 and 18 (corresponding to the connecting portions described in the claims) which are opened on the upper edge and the plate surface. The connection grooves 17 and 18 are cut out at intervals larger than the plate thickness of the tabs 16a and 16b of the relay 16, and angled contact portions 17a, 17a, and 18a and 18a protrude from inner edges facing each other. ing. Contact portions 17a, 17a and 18a, 1
The distance between the opposing tops of the relays 8a is the tabs 16a, 1
6b is formed narrower than the plate thickness.

On the other hand, between the terminal strips 14 and 15, similarly to the upstream bus bar 11 and the downstream bus bar 12, a strip 1 formed by stamping a metal plate into a strip by pressing.
9 and 20 are accommodated and arranged in predetermined grooves 13 a of the insulating plate 13.

The tabs 16a and 16b of the relay 16 to be connected are held upward at the end of the strip 19 on the upstream bus bar 11 side and the end of the strip 20 on the downstream bus bar 12 side, respectively. Holding pieces 21, 22 projecting toward
Are bent.

The holding pieces 21 and 22 have terminal pieces 14 and 15
Similarly, the connection groove 23 opening on the upper edge and the plate surface,
24 (corresponding to the connecting portion described in the claims). The connection grooves 23 and 24 are cut out at intervals larger than the plate thickness of the tabs 16a and 16b of the relay 16, and the inner edges facing each other have angled contact portions 23a and 23.
a and 24a, 24a are projected. Contact part 23
The distance between the opposing tops of a, 23a and 24a, 24a is formed smaller than the plate thickness of the tabs 16a, 16b of the relay 16.

The belt-like plates 19 and 20 do not form an internal circuit, and are not electrically connected. As a material of the band-shaped plates 19 and 20, it is preferable to use, for example, a copper alloy which has sufficient strength for the holding pieces 21 and 22 to hold an electric component such as the relay 16 and has good heat dissipation.

On the other hand, the distance between the terminal piece 14 and the holding piece 21 and the distance between the terminal piece 15 and the holding piece 22
Trisection axis L1 in the connection direction of the tab 16a or 16b of
L2 (see FIG. 3) is formed so that the terminal piece 14 and the holding piece 21 or the terminal piece 15 and the holding piece 22 substantially match each other.

In the above configuration, one tab 16a of the relay 16 is connected to the terminal piece 14 and the holding piece 21 and the other tab 1a.
6b is inserted into and connected to the terminal piece 15 and the holding piece 22 from above with the plate surfaces orthogonal to each other. First, the contact portions 17a, 17a, and 18a, 18a of the terminal pieces 14, 15 and the contact points of the holding pieces 21, 22 Parts 23a, 23a and 24a, 24
The tabs 16a and 16b abut on a. When the relay 16 is further depressed, the tabs 16a, 16b slidably contact the contact portions 17a, 17a, 18a, 18a and the contact portions 23a, 23a, 24a, 24a, and press them outward, so that the terminal pieces 14 and 15 connection grooves 1
7 and 18 and the holding pieces 21 and 2
The portions forming both sides of the connection grooves 23 and 24 are elastically pushed outward, and the reaction causes the contact portions 17a and 17a.
7a, 18a, 18a and contact portions 23a, 23a,
And 24a, 24a sandwich tabs 16a, 16b to complete the connection.

The tabs 16a and 16b are connected to the connection grooves 17,
If the connection is made so as to be in contact with the semicircular bottoms of 18, 23 and 24, one tab is supported at eight contact points, and the tab is properly held without rattling.

According to the holding structure of the above-described embodiment, the relay 16 as a connection partner (an electric component having a tab as a connection terminal such as a fuse, for example, can be applied without being limited thereto) can be applied. Each of the tabs 16a, 16b fits into a connection groove 17, 18, 23, 24 as a connection portion between the corresponding terminal piece 14, 15 and the holding piece 21, 22, and the terminal piece 14 is provided for each of the tabs 16a, 16b. , 15 and the holding pieces 21 and 22 are directly connected to each other, so that electrical components such as the relay 16 can be sufficiently held, and the resonance point of the connection portion due to vibration can be suppressed.

Since the holding pieces 21 and 22 are not electrically connected, the terminal pieces 14 and 15 and the tabs 16a,
It functions as a heat sink for 16b and can suppress a rise in temperature.

Furthermore, since it is simple and inexpensive to manufacture, there is no need to use complicated and expensive members such as female-female relay terminals, and the terminal pieces 14 and 15 and the holding pieces 21 and 2 can be used.
If the interval between the two is formed so as to substantially coincide with the trisection axes L1 and L2 of the corresponding tabs, not only the heat radiation property but also the holding force is improved, and it is possible to sufficiently cope with the torsional vibration mode. . Further, the actual length of the bus bar can be shortened, and the wiring space can be reduced.

[0031]

As described above, according to the first aspect of the present invention, the holding structure of the electric component connected to the terminal piece is provided at the ends of the upstream bus bar and the downstream bus bar.
Form a terminal strip that is orthogonal to the tab plate face of the electrical component to be connected, and that the respective plate faces face each other. A structure is adopted in which independent holding pieces are provided which face each other at a predetermined interval with respect to the plate surface of the corresponding terminal piece, and the terminal piece and the holding piece are formed with connection portions for the tabs of the electric component, respectively. . If such a holding structure is adopted, each tab of the electric component as a connection partner fits into the connection portion between the corresponding terminal piece and the holding piece, and is directly driven by the elasticity of the terminal piece and the holding piece for each tab. Since the connection is made, the electric parts can be sufficiently held, and the resonance point of the connection part due to vibration can be suppressed. Further, since the holding piece is not electrically connected, the holding piece plays a role of a heat radiating plate for the terminal piece and the tab, so that an effect of suppressing a rise in temperature can be obtained. Furthermore, since it can be manufactured simply and inexpensively, there is no need to use complicated and expensive members such as female-female relay terminals. In addition, there is an effect that the actual length of the bus bar can be shortened and the wiring space can be reduced.

According to the second aspect of the present invention, the predetermined interval between the terminal piece and the holding piece is such that the terminal piece and the holding piece substantially coincide with the trisection axis of the tab of the corresponding electric component. It is formed as follows. If the distance between the terminal piece and the holding piece is formed so that the terminal piece and the holding piece substantially coincide with the trisection axis away from the center axis of the tab, not only the heat radiation property but also the holding force is improved. In addition, there is an effect that it is possible to sufficiently cope with a torsional vibration mode.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a holding structure of an electric component connected to a bus bar-integrated terminal piece according to the present invention.

FIG. 2 is a schematic diagram showing a connection and holding state of FIG. 1;

FIG. 3 is a front view including a partial cross section of FIG. 1;

FIG. 4 is a perspective view showing a conventional connection structure between a bus bar-integrated terminal piece and an electric component.

FIG. 5 is a schematic diagram showing a connection state of FIG. 4;

FIG. 6 is a front view including a partial cross section of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Upstream bus bar 12 Downstream bus bar 13 Insulating plate 14, 15 Terminal strip 16 Relay (electric part) 16a, 16b Tab 17, 18 Connection groove (connection part) 17a, 18a Contact part 19, 20 Strip plate 21, 22 Retention Pieces 23, 24 Connection groove (connection part) 23a, 24a Contact part

Claims (2)

[Claims] 1. A terminal strip which is orthogonal to a tab plate surface of an electric component to be connected and whose respective plate surfaces are opposed to each other is formed at an end of each of the upstream bus bar and the downstream bus bar. Is provided with independent holding pieces, which are formed by bending a strip-shaped plate having no electrical continuity and facing the plate face of the strip-shaped board side at a predetermined interval with the plate face of the corresponding terminal strip. A holding structure for an electric component connected to a bus bar-integrated terminal piece, wherein each of the connecting portions is formed with a tab of the electric component. 2. The holding structure for an electric component connected to the bus bar-integrated terminal piece according to claim 1, wherein the terminal piece and the holding piece are separated from the predetermined interval by a trisection axis of a tab of the corresponding electric component. Are formed so as to substantially coincide with each other.