JP2002101526A - Power-connecting structure for electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power-connecting structure for an electric connection box capable of slimming down an insulating housing by simplifying and downsizing a busbar. SOLUTION: An FL block 30 constituting the power-connecting structure for an electric connection box comprises the insulating housing 31, a tabular busbar 32 and a power-input terminal 33. A busbar-inserting section 39 for inserting the busbar 32 into the coaxial lower part of an upper FL inserting section 36 is formed at the insulating housing 31. Also, a terminal-housing room 38 for the power-input terminal 33 is formed at the coaxial lower part of the busbar-inserting section 39. A fixing lance 37 for fixing the power-input terminal 33 is formed in the terminal-housing room 38. An FL-connecting tab 41 inserted into the FL and a power-input tab 42 inserted into the power-input terminal 33 at the coaxial lower part of the FL-connecting tab are integrally formed into one piece at one end of the busbar 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus bar to which a power supply wire for supplying power to electric equipment mounted on an automobile or the like is connected, and a fitting terminal to which a load wire is connected are inserted from the upper surface of the insulating housing. The present invention relates to a power supply connection structure of an electric connection box connected via a fusible link to be attached.
In particular, the present invention relates to a power input terminal connection structure optimal for a fusible link block into which a multi-fusible link in which a plurality of fusible links are integrated in a chain is inserted.

[0002]

2. Description of the Related Art Conventionally, many fuses and fusible links have been used to protect electronic elements and the like used in electric equipment mounted on automobiles and the like from excessive current. The box-shaped block which collectively stores therein has various forms depending on the vehicle type and the mounting position. For example, in the conventional fusible link block (hereinafter, referred to as FL block) shown in FIG. 4, six insertion recesses 4 into which the fusible links 3 are inserted are formed in the insulating housing 1 with the partition wall 5 interposed therebetween. ing.

A notch 5a is formed in the partition wall 5, and the bus bar 7 is connected to the insulating housing 1 using the notch 5a.
To be fixed. The bus bar 7 has tab-shaped terminals 9 integrally formed corresponding to the insertion recesses 4. Each of the tab-shaped terminals 9 is attached to the bottom surface of each insertion recess 4 with the bus bar 7 fitted and fixed in the insulating housing 1. It is in a state protruding from.

In the insulating housing 1, a fitting terminal 13 to which a load wire 11 is connected is connected to a tab-like terminal 9 of a bus bar 7 from a surface (lower side in the figure) opposite to the insertion recess 4.
And a state protruding from the bottom surface of each insertion recess 4 so as to form a pair. In this state, the fusible link 3 is inserted and fixed in the insertion concave portion 4, so that the tab-shaped terminal 9 and the fitting terminal 13 are inserted into a pair of mutually conductive female terminals of the fusible link 3, respectively. Both terminals 9, 1
The three are electrically connected via the fusible link 3.

Further, the bus bar 7 has a terminal connection portion 15 in addition to the tab-shaped terminal 9. The terminal connection portion 15 is formed to be bent with respect to the portion of the bus bar 7 where the tab-shaped terminal 9 is formed, and is placed on a bolt housing 17 provided in the insulating housing 1. This terminal connection part 1
5, a screw terminal 21 connected to the power supply wire 19 is provided.
Is mounted, and the screw portion of the bolt 23 housed in the bolt housing portion 17 with the head down is protruded upward through the terminal connection portion 15 and the screwed terminal 21, and a nut is attached to the bolt 23. Is concluded.

A power supply wire 19 connected to the screw terminal 21 and a load wire 11 connected to the fitting terminal 13
Is pulled out below the insulating housing 1 and is accommodated in a lower cover 27 mounted on the lower side of the insulating housing 1, and an outlet 27 a formed at an end of the lower cover 27.
Is taken out to the outside.

[0007]

However, in the above-mentioned conventional FL block, a dedicated space for connecting the screw terminal 21 of the power supply wire 19 and the terminal connection portion 15 of the bus bar 7 is required, and the shape of the bus bar 7 is required. However, there is a problem that the cost increases because the size of the FL block is increased. Further, unlike the FL block, an FL block of a type in which the power supply wire 19 and the bus bar 7 are connected by connector fitting without using the screw terminal 21 has been proposed. In this FL block, a dedicated space for fitting the connector is required, and as described above, there is a problem that the size of the FL block is increased, which leads to an increase in cost.

An object of the present invention is to solve the above-mentioned conventional problems, and to simplify and downsize a bus bar, thereby reducing the size and weight of an insulating housing. It is intended to provide a connection structure.

[0009]

The object of the present invention is to provide a power input terminal connected to a power supply wire and an insulating housing having a fusible link insertion portion for inserting a fusible link. A power supply for an electric connection box, comprising: a tab-shaped terminal projecting from a bottom surface of the fusible link insertion portion; and a terminal connection portion to which the power input terminal is connected, and a bus bar inserted into the insulating housing. This can be solved by a connection structure, wherein the power supply input terminal is arranged on an axis of the tab-shaped terminal, and the power supply connection structure of the electric connection box.

[0010] The above object is also achieved in the power supply connection structure of the electric connection box, wherein the terminal connection portion of the bus bar and the terminal portion of the fusible link are preferably fitted.
The two tab-shaped terminals are integrally formed coaxially, and the power input terminal is directly connected to the terminal connection portion by fitting the terminals together. It can be solved by the connection structure.

[0011] Further, the object is to provide a power supply connection structure for an electric junction box, wherein the power input terminal is preferably a bus bar insertion portion into which the bus bar is inserted or a terminal accommodating chamber in which the power input terminal is accommodated. This can be solved by the power supply connection structure of the electric connection box, which is characterized by being fixed by:

In the power supply connection structure of the electric junction box having the above-described structure, the power input terminal is arranged on the axis of the tab-shaped terminal, so that one of the busbars is inserted in the insertion space of the fusible link in the insulating housing. The fusible link and the power input terminal can be electrically connected via the tab-shaped terminal. Therefore, it is not necessary to provide a dedicated space for connecting the power input terminal, and the bus bar can be simplified, so that the size of the insulating housing can be reduced and the weight can be reduced accordingly.

In the power supply connection structure of the electric junction box, if the terminal connection portion of the bus bar and one tab-shaped terminal for fitting the terminal portion of the fusible link are integrally formed coaxially, It is possible to further simplify the bus bar and save space in the insulating housing. In addition, since the power input terminal can be electrically connected to the fusible link simply by directly connecting to the terminal connection part, connectors and adapters are not required, and insertion of the power input terminal including checking of the mating state is not required. Wearing work can be improved.

Further, in the power supply connection structure of the electric connection box, if the power supply input terminal is fixed in a bus bar insertion portion into which the bus bar is inserted or in a terminal accommodating chamber in which the power input terminal is accommodated, the inside of the insulating housing is provided. In addition to saving space, the need for a power input connector or adapter is eliminated, and costs can be reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a power supply connection structure for an electric junction box according to the present invention will be described below in detail with reference to FIGS. FIG. 1 is an exploded perspective view showing an embodiment of a power connection structure of an electric connection box of the present invention. FIG. 2 shows a state in which a bus bar and a power input terminal in FIG. 1 are inserted into an insulating housing. FIG. 3 is a longitudinal sectional view taken along a plane parallel to the plane of the bus bar, showing a state in which the bus bar and the power input terminal in FIG. 1 are inserted into an insulating housing. In the description of the present embodiment, description of the configuration (fitting terminal and the like) on the power output side (load side) and operation, description of the configuration and operation in the fusible link, and description of the power supply wire connected to the power input terminal The description of the cord is omitted.

As shown in FIG. 1, the FL block 30 showing the power supply connection structure of the electric connection box of the present embodiment includes an insulating housing 31 having a fuse insertion portion 35 on the upper surface of which a plurality of fuses can be inserted, It has a flat bus bar 32 inserted from below the insulating housing and a power input terminal 33 for supplying power. This insulating housing 31
Is a fusible link insertion portion 36 (hereinafter simply referred to as FL) in which a plurality of fusible links are integrated in a chain at a position adjacent to the fuse insertion portion 35 on the upper surface. Hereinafter, it is referred to as an FL insertion portion.)
Are formed.

A busbar insertion portion 39 for inserting the busbar 32 is formed coaxially below the fuse insertion portion 35 and the FL insertion portion 36. Further, a terminal accommodating chamber 38 for a power input terminal 33 is formed coaxially below the bus bar attaching section 39 on the FL attaching section 36 side, and the power input terminal 33 is provided in the terminal accommodating chamber 38. A locking lance 37 for fixing is formed.

The bus bar 32 is formed by punching a flat plate, and is provided with four tuning fork terminals 43 for fitting the terminal portions of the fuses to be inserted into the fuse insertion portions 35. Below this, two locking holes 44 for fixing are formed. Further, at one end of the bus bar 32, a fusible link connection tab 41 (hereinafter, referred to as a protrusion) that projects upward from the bottom surface of the FL insertion portion 36 and is inserted into the FL.
A power input tab 42 inserted into the power input terminal 33 coaxially below the FL connection tab.
(See FIG. 3) are integrally formed.

The power input terminal 33 is a female terminal having a box-shaped connection part 45 at the front part.
5 has an elastic contact piece that elastically urges the power input tab 42 when the power input tab 42 is fitted. Further, the connecting portion 45 is formed with a fixing hole 47 to be locked by the locking lance 37.

Next, an assembling procedure in the power supply connection structure of the electric junction box according to the present embodiment will be described. First, as shown in FIG. 1, the FL connection tab 41 and the power input tab 42 of the bus bar 32 are inserted from the terminal accommodating chamber 38 opened below the insulating housing 31 and fitted into the bus bar insertion portion 39. . At this time, as shown in FIG.
The bus bar 32 is fixed in the bus bar insertion section 39 by engaging the locking projection 44 formed in the bus bar insertion section 39 with the locking hole 44 of the bus bar 32. Therefore, the FL connection tab 41 and the power input tab 42 are positioned at predetermined positions on the central axis C without being directly fixed.

Next, as shown in FIG.
Is a terminal accommodating chamber 3 opened below the insulating housing 31.
8, the fixing holes 47 (see FIG. 1) are locked by locking lances 37 formed in the terminal accommodating chamber 38. Therefore, the power input terminal 33 is directly fixed at a predetermined position in the terminal accommodating chamber 38 without using a connector, an adapter or the like. At this time, the power input tab 42 is inserted into the connection portion 45 of the power input terminal 33, and the power input terminal 33 and the power input tab 42 are electrically connected.

Next, as shown in FIGS. 2 and 3, the FL 34 is inserted into the FL insertion portion 36 on the upper surface of the insulating housing 31. As a result, the FL connection tab 41 is inserted into the FL 34, thereby electrically connecting the FL 34 and the FL connection tab 41, and the assembling operation is completed. Therefore, FL3
FL34, FL on the central axis C passing through one connection of
The connection tab 41, the power input tab 42, and the power input terminal 33 can be reliably and easily connected without providing a dedicated connection space.

The power supply connection structure of the electric connection box of the present invention is not limited to the above-described embodiment, but can be appropriately changed. For example, in the present embodiment, an FL block in which a multi-fusible link is inserted has been described. However, a sufficient effect can be obtained by applying to an FL block in which a single fusible link is inserted. Further, since the power input terminal is fitted into the power input tab and fixed to the locking lance, the locking hole of the bus bar does not necessarily need to be provided, and the position is shifted only by being inserted into the bus bar insertion portion. There is nothing.

[0024]

As described above, in the power supply connection structure of the electric connection box according to the present invention, since the power input terminal is arranged on the axis of the tab-shaped terminal, the insertion of the fusible link in the insulating housing is performed. In the space, the fusible link and the power input terminal can be electrically connected via one tab-shaped terminal of the bus bar. Therefore, there is no need to provide a dedicated space for connecting the power input terminal, and the bus bar can be simplified to reduce the cost, and
The space and the weight of the insulating housing can be reduced.

In the power supply connection structure of the electric connection box, if the terminal connection portion of the bus bar and one tab-shaped terminal for fitting the terminal portion of the fusible link are integrally formed coaxially, Further simplification of the bus bar and further space saving in the insulating housing can be achieved. Also, since the power input terminal can be electrically connected to the fusible link only by directly connecting to the terminal connection portion, there is no need to connect via a connector or an adapter.
It is possible to improve the work of inserting and removing the power input terminal, including checking the fitting state, and further reduce the cost.

Further, in the power supply connection structure of the electric connection box, if the power supply input terminal is fixed in a bus bar insertion portion into which a bus bar is inserted or in a terminal accommodating chamber in which the power input terminal is accommodated, an insulating housing is provided. The space inside can be saved, and a connector or adapter for power input is not required, so that the cost can be further reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a power supply connection structure of an electric connection box of the present invention.

FIG. 2 is a longitudinal sectional view showing a state in which a bus bar and a power input terminal in FIG. 1 are inserted into an insulating housing, and is cut along a plane orthogonal to a plane of the bus bar.

FIG. 3 is a longitudinal sectional view showing a state where the bus bar and the power input terminal in FIG. 1 are inserted into an insulating housing, and is cut along a plane parallel to a plane of the bus bar.

FIG. 4 is an exploded perspective view showing a power supply connection structure of a conventional electric connection box.

[Explanation of symbols]

 Reference Signs List 30 FL block 31 Insulated housing 32 Bus bar 33 Power input terminal 34 Multi-fusible link (FL) 35 Fuse insertion part 36 FL insertion part 37 Locking lance 38 Terminal accommodating chamber 39 Bus bar insertion part 41 FL connection tab (tab) 42) Power input tab (terminal connection part) 44 Locking hole 46 Locking projection 47 Fixing hole C Central axis

Continued on the front page (72) Inventor Kazuhiro Watanabe 1500 Onjuku, Susono-shi, Shizuoka Prefecture Yazaki Parts Co., Ltd. F-term (reference) 5G361 BA03 BB01

Claims (3)

[Claims] A power input terminal connected to a power supply wire; an insulating housing formed with a fusible link insertion portion for inserting a fusible link; and a projection protruding from a bottom surface of the fusible link insertion portion. A bus bar inserted into the insulating housing, comprising a tab-shaped terminal and a terminal connection portion to which the power input terminal is connected.
A power supply connection structure for an electric junction box, comprising: the power input terminal disposed on an axis of the tab-shaped terminal. 2. The terminal connecting portion of the bus bar and one tab-shaped terminal for fitting the terminal portion of the fusible link are integrally formed coaxially, and the power input terminal is The power supply connection structure for an electric connection box according to claim 1, wherein the terminal connection portion is directly connected to the terminal connection portion by fitting of the terminals. 3. The power supply terminal according to claim 1, wherein the power input terminal is fixed in a bus bar insertion portion into which the bus bar is inserted or in a terminal accommodating chamber in which the power input terminal is accommodated. Power connection structure of electrical junction box.