DE102009032971B4 - Electrical distribution box - Google Patents

Abstract

An electrical distribution box having a housing body (11) and a vertical bus bar (30) received in the housing body (11), the housing body (11) having a fuse containing portion (12) for receiving at least one fuse (40) wherein the vertical bus bar (30) is provided with a fuse connection terminal (33) and the fuse (40) is electrically connected to the fuse connection terminal (33), the fuse connection terminal (33) being disposed on a horizontal portion (32) formed by bending the vertical busbars (30), wherein the fuses containing portion (12) is provided at a lower part with a locking projection (23) for locking the horizontal portion (32) of the vertical busbar (30), characterized in that the locking portion (23) has a pair of protrusions (24) formed by a bottom wall of the fuses A portion (12) projecting and engaging projections, wherein the horizontal portion (32) of the vertical bus bars (30) with an engagement opening (34) for receiving the locking portion (23) is provided.

Description

This invention relates to an electrical distribution box in which a housing includes a vertical bus bar, wherein a fuse connection terminal is disposed on a horizontally bent portion of the vertical bus bar, and the vertical bus bar is prevented from being deformed by the insertion force of a fuse.

An electrical distribution box is provided on an exterior of a housing body with a fuse receiving portion (one or more). A bus bar serving as an internal circuit part is contained in the case body. The fuse is connected to a fuse connection terminal of the bus bar. In many cases, the bus bar is horizontally supported by an insulating plate in the housing body. A fuse terminal is connected to a fuse connection terminal which projects up from a horizontal bus bar horizontally disposed in the housing body. In these cases, since the bus bar is supported by an insulating plate, it is possible to prevent the bus bar from being deformed by the insertion load when inserting a fuse.

On the other hand, there is the case where a vertical bus bar disposed in a housing in a vertical direction and provided with a fuse-containing portion and a relay-containing portion is used in place of the horizontal bus bar horizontally inserted through the insulating board in FIG the housing is worn. When the vertical bus bar is used, there are advantages in terms of reducing the need for use of the insulating plate, weight reduction, and downsizing as compared with a horizontal bus bar. However, since the vertical bus bar is locked and held on a frame of the housing and is not supported by the insulating plate, there is a problem that the vertical bus bar can be deformed by a vertical load when the fuse is connected to the fuse connection terminal.

The EP 1 282 192 A1 discloses a bus bar according to the preamble of the current claim 1.

For example, in an electrical distribution box 1 according to attached 5 a vertical bus bar 3 is accommodated and fixed in a housing 2. The vertical bus bar 3 is provided with a plurality of tabs 3b extending from an upper end of a vertical base plate portion 3a. The tabs 3b connected to connection terminals 4 are inserted in a lower part of a fuse-containing portion 5 of the case 2. A terminal 6a of a fuse 6 is inserted downward in each connection terminal 4 to connect the fuse 6 to the vertical busbar 3 via the connection terminal 4 (see FIG JP H07 8966 U ).

The vertical bus bar 3 is fixed to the case 2 by inserting and locking a holding projection 7 projecting from the case 2 and entering an engaging hole 3c in the base plate portion 3a.

As for the design of an electrical distribution box according to 6 is concerned, when a vertical base plate portion 8a of a vertical bus bar 8 is displaced from a fuse containing portion, an insertion position of a terminal 9a of a fuse 9 is adapted to a tongue 8c in some cases by bending a horizontal portion 8b from a bus bar 8 and Further, the tongue 8c is bent in the vertical direction from the horizontal portion 8b.

However, since there are few cases where an insulating plate or the like supports a bottom surface of the horizontal portion 8b when the vertical bus bar 8 is used, there is a problem that the horizontal portion 8b is moved downward upon insertion of the fuse 9, as in 6 is shown in dashed lines and the horizontal portion 8b can be deformed. Especially, in the case of a large-capacity fuse, since the insertion pressure is large, the horizontal portion 8b is likely to be deformed.

In view of the above problems, it is an object of the present invention to provide an electrical distribution box housing a vertical bus bar to be connected to a fuse, wherein a horizontal portion provided on the vertical bus bar is prevented from being deformed by an insertion pressure of the fuse.

To achieve the above object, the present invention provides an electrical distribution box having a housing body and a vertical bus bar received in the housing body. The housing body is provided with a section containing at least one fuse for receiving at least one fuse. The vertical bus bar is provided with at least one fuse connection terminal. A fuse is electrically connected to the fuse connection terminal. The fuse connection terminal is disposed at a horizontal portion formed by bending the vertical bus bar. The at least one fuse containing portion is provided at a lower part with a locking portion to lock the horizontal portion of the vertical bus bar.

Thus, since the lock portion provided at the lower part of the portion including the fuse (at least one) on the housing body locks the horizontal portion of the vertical bus bar and the horizontal portion is supported by the lock portion, it is possible to prevent the lock portion from being locked horizontal section moves down and is deformed at an insertion pressure of the fuse.

The locking portion preferably includes a pair of protrusions projecting from a bottom wall of the fuse containing portion and having engagement protrusions. The horizontal portion of the vertical bus bar is provided in an engaging hole for receiving the locking portion.

Alternatively, the locking portion may be provided on a peripheral wall surrounding the fuse receiving portion or on a partition for partitioning a space in the fuse receiving portion.

In the case where the fuse is a large size type fuse having a large capacity of 50A (ampere) to 100A (amperes), the above structure is particularly preferable since an insertion force of the fuse becomes large.

It is preferable that the fuse connection terminal on the vertical bus bar is bent further from the horizontal portion in a vertical direction.

Furthermore, there may be many cases where the fuse connection terminal on the vertical bus bar is connected to the input terminal of the fuse.

An output terminal of the fuse is connected in a bus bar different from the vertical bus bar or connected to a terminal at one end of an electric wire. In the case where an output terminal of a fuse is connected to a bus bar, when a horizontal portion on the bus bar is not supported by an insulating plate or the like, it is preferable to connect the horizontal portion of the locking portion to a wall of the fuse-containing one Lock and hold section, as is the case with the vertical bus bar, which is connected to the input terminal of the fuse.

In the event that a plurality of fuses-containing portions are adjacent to each other adjacent to the housing, preferably a plurality of tongues serving as fuse connection terminals are spaced from each other on a single vertical bus bar.

The connection terminal is included in the fuse receiving portion. The fuse terminal may be connected through the connection terminal to the fuse connection terminal of the vertical bus bar. The connection terminal may preferably use a jack type terminal.

An example of an electrical distribution box as described above is an electrical distribution box for connection to a wire harness laid in a motor vehicle.

According to the present invention and as described above, since the locking portion at the lower part of the fuse receiving portion is provided on the case body and the locking portion can lock and support the horizontal portion of the vertical bus bar, it is possible to prevent the horizontal Section is moved downward and deformed by an insertion pressure of a fuse.

Embodiments of the invention will be described by way of example with reference to the accompanying drawings.

• 1 eine auseinandergezogene perspektivische Ansicht der ersten Ausführungsform eines elektrischen Verteilergehäuses gemäß der vorliegenden Erfindung, wobei das Gehäuse von einer Bodenseite her dargestellt ist;
• 2 eine perspektivische Ansicht eines Hauptteils des elektrischen Verteilergehäuses von 1;
• 3 eine vergrößerte perspektivische Ansicht eines Verriegelungsabschnitts in dem elektrischen Verteilergehäuse von 1;
• 4A einen Sicherungen enthaltenden Abschnitt;
• 4B eine Schnittdarstellung durch den Sicherungen enthaltenden Abschnitt, gesehen entlang einer Schnittlinie B-B in 4A;
• 4C eine vergrößerte Schnittdarstellung des Sicherungen enthaltenden Abschnitts entlang Linie C-C in 4B;
• 4D eine perspektivische Ansicht eines Verbindungsanschlusses;
• 5 eine Längsschnittdarstellung durch ein elektrisches Verteilergehäuse nach dem Stand der Technik; und
• 6 eine erläuternde Darstellung eines Teils des elektrischen Verteilergehäuses nach dem Stand der Technik, wobei ein in dem elektrischen Verteilergehäuse vorliegendes Problem dargestellt ist.

It shows:

• 1 an exploded perspective view of the first embodiment of an electrical distribution box according to the present invention, wherein the housing is shown from a bottom side;
• 2 a perspective view of a main part of the electrical distribution box of 1 ;
• 3 an enlarged perspective view of a locking portion in the electrical distribution box of 1 ;
• 4A a fuse containing section;
• 4B a sectional view through the fuse-containing section, as seen along a section line BB in 4A ;
• 4C an enlarged sectional view of the fuse-containing portion along line CC in 4B ;
• 4D a perspective view of a connection terminal;
• 5 a longitudinal sectional view through an electrical distributor housing according to the prior art; and
• 6 an explanatory view of a portion of the electrical distribution box according to the prior art, wherein a present in the electrical distribution box housing problem is shown.

The 1 to 4 show a first embodiment of an electrical distribution box 10 according to the present invention.

The electrical distributor housing 10 is connected to a wire harness, which is laid in a motor vehicle. According to the 1 and 2 is a housing body 11 of the electrical distributor housing 10 on an upper side with adjacent sections 12 provided, each section 12 at least one fuse can hold or contain. In the first embodiment of the 1 and 2 are on the housing body 11 two sections containing fuses provided. A high-capacity fuse 40 of, for example, 80A (amperes) is in each fuse-fuse-containing portion 12 appropriate.

A vertical bus bar 30 serving as an internal circuit part is fixed in the case body 11 by a lance (not shown) provided in the case body 11. The vertical busbar 30 Also includes an internal circuit section that comes with the fuses 40 connected is.

An upper cover and a lower cover are on upper and lower sides of the case body 11 arranged and locked together.

According to 4A a peripheral wall 13 surrounds each fuse-containing portion 12 to form a space, and a bottom wall divides the space in the vertical direction. The bottom wall 14 is connected to a connection terminal 15 for receiving an input terminal 41 every backup 40 and an output port 16 for receiving an output port 42 of each fuse 40 Mistake. According to 4B A partition wall 19 divides a space below the bottom wall 14 into an input terminal cavity 17 and an output terminal cavity 18.

According to 4C A partition wall 22 divides the input terminal cavity 17 into a terminal connection space 20 and a lock space 21. A connection terminal to be described later 50 is received and fixed in the terminal connection space 20. locking projections 23 stand in the lock space 21.

According to the 2 and 3 contains each locking section 23 a pair of elastic protrusions 24 coming from the bottom wall 14 of each fuse-containing section 12 protrude downwards and are spaced from each other. As in 4C shown is a distal end of each projection 24 down below a lower opening in the connection connecting space 20 before. According to 3 is each projection 24 with an engaging portion 25 Mistake. A pair of engagement portions 25 of the pair of protrusions 24 extends in opposite directions to form a wing-like configuration. Each engaging section 25 includes a tapered portion 25a, the width of which gradually decreases, and a stepped portion 25b formed with a peripheral surface around an engagement hole 34 (described later) is engageable around.

The vertical busbar 30 contains a base plate section 31 which is in a neighboring direction of the two fuses containing sections 12 extends so that the busbar 30 in the vertical direction in the housing body 11 along a peripheral wall 11a of the case body 11 can be introduced, as well as two horizontal sections 32 extending from a lower end of the base plate section 31 are bent to extend downwardly and two tab-like securing connection terminals 33, the side edges of the horizontal sections 32 are bent upwards. Each backup connection port 33 is with respect to the base plate section 31 arranged in a vertical direction. Every horizontal section 32 is with an engagement opening 34 provided to receive the locking portion 23 and engage therewith. The intervention opening 34 has an elongated shape, extends parallel to the fuse connection terminal 33, and is located at a position opposite to the fuse connection terminal 33 ,

The vertical busbar 30 is in one end of the base plate section 31 in the extension direction and in a part between the two horizontal sections 32 provided with engagement openings 35. A lance (not shown) on a wall of the case body 11 comes into engagement with each engagement hole 35 around the vertical bus bar 30 on the housing body 11 set. The other end of the base plate portion 31 is provided with an L-shaped power supply terminal portion 36. In a bolt hole 37 in the power supply connection portion 36, a bolt is inserted to connect to a distal end of a supply line and the vertical bus bar 30 to connect with each other.

The vertical busbar 30 is on the housing body 11 attached so that the respective fuse connection terminals 33 can be introduced upward into the respective terminal connection spaces 20 of the respective input terminal cavities 17. Here are in accordance with 4C the engaging sections 25 the locking portions 23 in the engaging holes 34 the horizontal sections 32 introduced and the horizontal sections 32 are at a lower part of the fuse containing sections 12 locked.

Specifically, the pair of protrusions 24 gets into the intervention openings 34 introduced, with the projections 24 are deformed by the tapered portions 25a of the engaging portions 25 so as to move toward each other. When the insertion process of the projections 24 in the intervention openings 34 finished, the projections return 24 due to their elasticity in the starting position and the stepped portions 25b of the engaging portions 25 grab the peripheral edges on the short sides of the engagement holes 34 ,

According to the 4C and 4D is every connection connection 50 in each input terminal cavity 17 of each fuse-containing portion 12 arranged. Each connection terminal 15 includes a base plate part 53, an elastic part 54 bent upward from the lower end of the base plate part 53, and a pair of U-shaped contact parts 57 bent from opposite sides of the base plate part 53 to surround the elastic part 54. The elastic member 54 is bent in a substantially S-shaped configuration. The elastic member 54 is provided at an intermediate portion in the longitudinal direction with a first contact point 55 which bulges in a direction opposite to the base plate member 53 and at a distal end side with a second contact point 56 which is curved to one side of the base plate member 53. The distal ends of the base plate part and the elastic part 54 are bent away from each other in opposite directions. This thus facilitates the insertion of the input terminal 41 the fuse 40 into the input port cavity 17.

The connection port 50 will advance to the backup connection port 33 the vertical busbar 30 inserted and the vertical busbar 30 is received in the housing 51.

The backup connection port 33 the vertical busbar 30 becomes upward in a space between the contact part 57 of the connection terminal 50 and the elastic member 54 and clamped by the first contact point 55 of the elastic member 54 and the contact member 57. The input connection 41 the fuse 40 is inserted down into a space between the base plate part 53 and the elastic part 54, and clamped by the base plate part 53 and the second contact point 56 of the elastic part 54. Thus, the fuse connection terminal 33 is the vertical bus bar 30 electrically via the connection terminal 50 to the input terminal 41 the fuse 40 connected.

According to 4B That is, a terminal 61 connected to one end of an electric wire or cable 60 in the wire harness is inserted upward into the output terminal cavity 18 and directly connected to the output terminal 42 of the fuse 40.

Although the electrical distribution box 10 as described above, does not include a structure having a bottom side of the horizontal portion 32 the vertical bus bar 30 through an insulating plate or the housing body 11 supports, locks and holds the electrical distributor housing 10 the horizontal section 32 by the locking portion 23 projecting downward from the fuse-containing portion 12. Thus, even if a high insertion pressure is applied to the fuse link terminal 33 of the vertical bus bar 30 when connected to the input terminal 41 of the fuse 40 and also the horizontal section 32 in extension from the fuse connection terminal 33 is exercised when the fuse 40 of high capacity contained in the fuses section 12 is used, it is possible to prevent the horizontal section 32 is deformed, as the horizontal section 32 is held by the stepped portion 25 b of the locking portion 23, so that prevents the horizontal portion 32 moved down.

An electrical distribution box has been described which includes a vertical bus bar for connection to a fuse. In order to prevent the vertical busbar from being deformed by an insertion pressure of the fuse, the electrical junction box includes a housing body, the housing body accommodating the vertical busbar. The fuse is inserted into a fuse-containing portion on the housing body. The vertical bus bar is provided with a fuse connection terminal. The fuse is electrically connected to the fuse connection terminal. A horizontal portion is formed by bending a base plate of the vertical bus bar. The fuse connection terminal is formed by further bending the horizontal section. The horizontal portion is not supported by the case body or an insulating plate in the case body. The fuse-containing portion is provided at a lower part with a locking protrusion for locking the horizontal portion of the vertical bus bar, so that the horizontal portion is prevented from being deformed by an insertion pressure of the fuse.

The present invention is not limited to the above embodiments. The fuse connection terminal may be a tuning fork-like tongue having a press insertion slot in which an input terminal of a fuse can be directly inserted and any connection terminal does not need to be used.

LIST OF REFERENCE NUMBERS

10

electrical distribution box

11

Housing body (housing)

12

(a) fuse (s) containing section

14

bottom wall

23

locking section

24

projections

25

engaging portions

30

vertical busbar

31

Base plate portion

32

horizontal section

33

Backup link connection

34

engagement opening

40

fuse

41

input port

50

connection port

Claims (5)

An electrical distribution box having a housing body (11) and a vertical bus bar (30) received in the housing body (11), the housing body (11) having a fuse containing portion (12) for receiving at least one fuse (40) wherein the vertical bus bar (30) is provided with a fuse connection terminal (33) and the fuse (40) is electrically connected to the fuse connection terminal (33), the fuse connection terminal (33) being disposed on a horizontal portion (32) formed by bending the vertical busbars (30), wherein the fuses containing portion (12) is provided at a lower part with a locking projection (23) for locking the horizontal portion (32) of the vertical busbar (30), characterized in that the locking portion (23) has a pair of projections (24) containing from a bottom wall of the fuses Section (12) projecting and engagement projections, wherein the horizontal portion (32) of the vertical busbars (30) with an engagement opening (34) for receiving the locking portion (23) is provided. Electrical distributor housing after Claim 1 characterized in that the locking portion (23) is disposed on a peripheral wall surrounding the fuse-containing portion (12) or on a partition partitioning a space in the fuse-containing portion (12). Electrical distributor housing according to one of the Claims 1 or 2 characterized in that the fuse connection terminal (33) on the vertical bus bar (30) is further bent in a vertical direction from the horizontal portion (32). Electrical distributor housing according to one of the Claims 1 to 3 characterized in that the horizontal portion (32) is locked and held by the locking portion (23) provided on a wall of the fuse-containing portion (12). Electrical distributor housing according to one of the Claims 1 to 4 characterized in that, when a plurality of fuses-containing portions (12) are juxtaposed to the housing body (11), a plurality of fuse connection terminals (33) are spaced from each other on a single vertical bus bar (30).

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