JP2005319921A - Wire harness connection structure for front end module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce an increase in the number of electric wires and the number of parts by modulating a front end wire harness at periphery of a front part of an automobile. <P>SOLUTION: A relay block connected to a power source and mounted in an engine room is divided to a main relay block 40 connected to a main front wire harness and a sub-relay block 20 connected to the front end wire harness. A power source circuit 43 of the main relay block 40 and a power source circuit 21 of the sub-relay block 20 are connected through a fuse 80, the fuse 80 is attached in a fuse holder 83 in advance, and the fuse holder 83 is mounted in a boundary position between the main relay block and the sub-relay block. An input terminal 80b and an output terminal 80c of the respective fuses 80 attached in the fuse holder 83 are inserted and fitted in fuse terminal insertion parts 81 and 82 of the main relay block 40 and the sub-relay block 20, respectively. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wire harness connection structure of a front end module, and more particularly, facilitates connection between a front end wire harness of a front end module and a main front wire harness in an engine room.

  Conventionally, modularization of automobile parts has progressed, and as a front end module in which structural bodies (lamp unit, horn, radiator, bumper, etc.) around the front of an automobile are assembled, in Japanese Patent Laid-Open No. 2000-238661, FIG. The front end module 1 shown in FIG. Prior to assembly to the vehicle body 9, the front end module 1 is assembled with a head lamp 3, a condenser 4, a radiator 5, a motor fan 6, and a lower member 7 in advance on the radiator core support frame 2. Wire harness W / H1 is routed. The terminal connector 8 of the front end wire harness W / H1 is connected to the connector 10 of the terminal of the main front wire harness W / H2 in the engine room when the front end module 1 is assembled to the vehicle body 9.

However, when the main front wire harness is simply divided into the front end wire harness, the front end wire harness W / H1 and the main front wire harness W / H2 are connected to the connector 8, as shown in the circuit diagram of FIG. When 9 is fitted and connected, the number of electric wires increases, and accordingly, the number of parts also increases, resulting in a problem that the connector becomes large and expensive. In addition, since the large-diameter power wires of the front end wire harness W / H1 and the main front wire harness W / H2 are connected to each other by connectors, the size of the connector increases, making connection work difficult in a narrow engine room, and There is a problem that takes up space even after connection.
JP 2000-238661 A

  The present invention has been made in view of the above problems, and modularizes the front end wire harness around the front of the automobile, so that the increase in the number of wires and the number of parts due to the division from the main front wire harness is suppressed, The problem is to reduce the cost by reducing the number of parts.

In order to solve the above problems, the present invention provides a front end module in which an electric component including a lamp and a horn and a front end wire harness connected to the electric component are pre-assembled on a front end frame of an automobile.
The relay block connected to the power source and mounted in the engine room is divided into a main relay block connected to the main front wire harness and a sub relay block connected to the front end wire harness,
In the main relay block, the power circuit connected to the front end wire harness extends the power circuit to the sub relay block without passing through a relay, and the power circuit and the power circuit of the sub relay block are connected to each other. Connected via a fuse, the fuse is previously mounted in a fuse holder, and the fuse holder is mounted at the boundary position between the main relay block and the sub relay block adjacent to each other, and is mounted in the fuse holder. The input terminal of each fuse being inserted and locked to the fuse terminal insertion portion of the main relay block, while the output terminal is inserted and locked to the fuse terminal insertion portion of the sub-relay block, and
A wire harness connection structure for a front end module is provided, wherein the power circuit in the sub relay block is connected to a front end wire harness via a relay.

  According to the above configuration, the relay block that has been conventionally connected to the main front wire harness is divided into a main relay block that is connected to the main front wire harness and a sub relay block that is connected to the front end wire harness. Connection of the front end wire harness connects the power circuit of the main relay block and the power circuit of the sub relay block via a fuse, and the connection between the power circuits is not a connector connection, minimizing the increase in the number of wires and parts Can be limited.

The fuse used for connecting the power circuit of the main relay block and the power circuit of the sub relay block is mounted in the fuse holder in advance. Therefore, in the vehicle production line, it is only necessary to connect the terminals of the fuses to the power supply circuits of the main relay block and the sub relay block at a time, so that the connection work can be facilitated. Further, since a fuse having a predetermined capacity is mounted in advance in the fuse holder, a fuse having a predetermined capacity can be connected between the power supply circuits without making a mistake.
In particular, when there are a large number of fuses, such as 4 to 10, it is very troublesome work to install the fuses one by one, and erroneous insertion is likely to occur. Work can be performed remarkably efficiently and without erroneous insertion.
Since the fuse is a small part, the upper end of the fuse is placed at a position lower than the upper end of other relays to be mounted, but the upper end of the fuse holder with multiple fuses and the upper end of other relays etc. are the same height. If it is set so as to be, it becomes possible to attach the fuse and other parts together with a jig, and it is possible to facilitate the attachment of the fuse.

  Since the fuse that was required to be installed in the power circuit in the sub relay block is used to connect the power circuit of the main relay block and the sub relay block, the fuse relay must be connected to the main relay block and the sub relay block. No new members are required and the number of parts is hardly increased. Further, since the fuse is used to connect the main relay block and the sub relay block, it is not necessary to provide a fuse in the power circuit in the sub relay block, and the sub relay block can be reduced in size accordingly.

When a circuit change occurs in the front end wire harness, it is possible to cope with the circuit change by changing the front end wire harness without changing the main front wire harness. Therefore, the main front wire harness can be shared by different vehicle types.
In addition, the number and capacity of fuses to be assembled in the fuse holder differ depending on the grade of the automobile, but the structure of the relay block is often the same in the same vehicle type, so the fuse holder can be shared by different grades of automobiles.
Note that the fuse connection using the fuse holder is not limited to the connection between the divided relay blocks, and can be applied widely to an electrical connection box having an internal circuit in the case. Further, it can be used as a relay holder in which a plurality of relays can be mounted instead of the fuse.

  The input terminal or output terminal of each fuse mounted in the fuse holder is inserted and locked into the fuse terminal insertion part of the main relay block or the fuse terminal insertion part of the sub relay block, and the fuse holder is connected to the main relay block. It is preferable that it is assembled in advance in either one of the sub-relay block.

  According to the above configuration, the fuse terminal of the fuse holder pre-assembled in one of the main relay block and the sub-relay block is inserted into the fuse terminal of the other relay block simultaneously with the assembly of the main relay block and the sub-relay block. Since it is inserted and locked to the portion, the connection work of the main relay block and the sub relay block can be facilitated.

The fuse holder includes a box having a rectangular parallelepiped lower surface opening, and includes a holding portion that detachably holds the insulating case portions of the plurality of fuses in parallel, and protrudes from the lower surface of the insulating case portion held by the holding portion. When the input terminal and the output terminal are inserted and locked in the fuse terminal insertion portions of the main relay block and the sub relay block, the input terminal and the output terminal can be detached from the insulating case portion and removed.
Specifically, the holding portion of the fuse holder has the receiving recesses of the insulating case portion of each fuse arranged in parallel via a partition wall, and a holding spring is provided on the inner surface facing each receiving recess, so that the insulating case portion is elastic. The elastic clamping force is set so that the input terminal and the output terminal are smaller than the locking force by which the input terminal and the output terminal are locked to the fuse terminal insertion portion, so that the fuse straddles the main relay block and the sub relay block. And can be removed upward later.

According to the above configuration, the fuse holder is brought close to the fuse terminal so that the input terminal and the output terminal of the fuse mounted in advance in the fuse holder are inserted into the fuse terminal insertion portion of the main relay block and the sub relay block, and the terminal of the fuse When the fuse holder is removed after being locked to the fuse terminal insertion portions of the main relay block and the sub relay block, the fuse remains in a state of being locked to the fuse terminal insertion portion, and only the fuse holder can be removed.
In addition, the fuse holder from which the fuse has been removed can be reused by attaching another fuse again.
If the fuse holder is not removed from the main relay block and sub-relay block, the fuse holder is molded from a transparent resin so that the internal state can be seen from the outside. It is preferable to be able to confirm from the outside whether the power supply circuit of the sub relay block is connected.

As is clear from the above description, according to the present invention, the connection between the main front wire harness and the front end wire harness is connected to the power circuit of the main relay block connected to the main front wire harness and the front end wire harness. Since the power circuit of the sub relay block is connected via a fuse and the connection between the power circuits is not a connector connection, the increase in the number of wires and parts associated with the modularization of the front end module can be minimized. .
Also, fuses used to connect the power circuit of the main relay block and the power circuit of the sub relay block are mounted in advance in the fuse holder, and the terminals of the fuses are collectively connected to the main relay block and the sub relay in the vehicle production line. Since it can be connected to the power supply circuit of the block, the connection work can be facilitated, and a fuse having a predetermined capacity can be connected between the power supply circuits without making a mistake.
In addition, since the fuse that was required to be inserted in the power circuit in the sub relay block is used to connect the power circuit of the main relay block and the sub relay block, the number of parts does not increase, and the sub relay Since it is not necessary to provide a fuse in the power supply circuit in the block, the sub relay block can be reduced in size.

Embodiments of the present invention will be described with reference to the drawings.
1 to 6 show a first embodiment of the present invention, in which a main relay block 40 mounted on a battery 42 in an engine room S1 of an automobile and a sub relay block 20 assembled in a front end module 100 are shown. Is provided. A power circuit 43 that does not pass a relay in the main relay block 40 is connected to the power circuit 21 of the sub relay block 20.
In other words, the relay block that has been conventionally single is divided into the main relay block 40 and the sub relay block 20, and the sub relay block 20 is connected to the front end wire harness W / H 1 that is assembled to the front end module 100 in advance. Only the control line is connected to the sub relay block 20 and the main relay block 40 by a connector.

The power supply circuit 43 of the main relay block 40 and the power supply circuit 21 of the sub relay block 20 are connected via a fuse 80 as shown in FIG.
Specifically, the power supply circuit 43 that does not pass through the relay in the main relay block 40 includes a bus bar 90 having conductivity, and a pressure contact tab provided by bending the front end portion of the bus bar 90 upward and cutting out a pressure contact slot from the front end. 90 a is arranged in the fuse terminal insertion portion 81 of the main relay block 40.
On the other hand, the power supply circuit 21 in the sub-relay block 20 is composed of an electric wire w, and a crimp terminal 91 provided with a female-shaped wire connection portion 91a is crimped to the end of the electric wire w. The fuse terminal insertion portion 82 is locked and arranged.
An input terminal 80b and an output terminal 80c protruding from the lower surface of the insulating case 80a of the fuse 80 are inserted into the fuse terminal insertion portions 81 and 82, respectively, and the input terminal 80b is connected to the pressure contact tab 90a of the main relay block 40. On the other hand, the output terminal 80 c is connected to the crimp terminal 91 of the sub relay block 20. The input terminal 80b and the output terminal 80c are connected via a fusing part (not shown) accommodated in the insulating case part 80a.

The fuse holder 83 used when connecting the fuse 80 to the power supply circuits 43 and 21 of the main relay block 40 and the sub-relay block 20, as shown in FIG. 3 and FIG. Inside, a holding portion 84 for holding the fuse 80 in a detachable manner is provided. The holding portion 84 includes accommodation recesses 85 for accommodating the insulating case portions 80a of the respective fuses 80 in parallel via the partition walls 86, and a holding spring 87 orthogonal to the partition wall 86 is provided on the inner surface facing each of the accommodation recesses 85. Yes. The sandwiching spring 87 is bent so that the center positions in the vertical direction are close to each other to form a sandwiching portion 87a for sandwiching the insulating case portion 80a of the fuse 80 from both sides, and below the sandwiching portion 87a are bent in the opening direction. I am letting.
Further, a projecting portion 89 projects downward from the lower end surface at a required location on the main relay block 40 of the fuse holder 83 and opens to the main relay block 40 at a position corresponding to the projecting portion 89. 44 is provided. When the fuse holder 83 is disposed on the main relay block 40 and the sub relay block 20, the projecting portion 89 of the fuse holder 83 is inserted into the opening 44 of the main relay block 40, thereby restricting the arrangement direction of the fuse holder 83. doing.
In the present embodiment, since the power circuit 43 of the main relay block 40 and the power circuit 21 of the sub relay block 20 are connected by the two fuses 80, only two fuses are attached to the fuse holder 83. The fuse holder 83 is configured to be capable of mounting four fuses 80, and may be configured to be capable of mounting a larger number of fuses.

  As shown in FIG. 3, when a fuse 80 having a required capacity is inserted into each receiving recess 85 of the fuse holder 83 from the upper end side of the insulating case portion 80a, the insulating case portion of the fuse 80 is shown in FIG. Both side surfaces of the short side of 80 a are sandwiched by the sandwiching portions 87 a of the sandwiching spring 87, and the fuse 80 is attached to the holding portion 84 of the fuse holder 83. At this time, the upper end surface of the insulating case portion 80a of the fuse 80 contacts the inner surface of the upper wall of the fuse holder 80, and the input terminal 80b and the output terminal 80c protruding from the lower end of the insulating case portion 80a are externally connected from the lower surface side of the fuse holder 83. Protruding.

When the fuse 80 is attached to the main relay block 40 and the sub relay block 20, as shown in FIG. 6, the input terminal 80 b and the output terminal 80 c of the fuse 80 are the fuse terminal insertion portions of the main relay block 40 and the sub relay block 20. The fuse holder 83 is disposed so as to straddle the main relay block 40 and the sub-relay block 20 that are lock-coupled so as to be inserted into 81 and 82, respectively. When the fuse holder 83 is pushed in until the lower end surface of the side wall of the fuse holder 83 contacts the upper surfaces of the main relay block 40 and the sub-relay block 20, the input terminal 80b of the fuse 80 is connected to the main terminal 80b as shown in FIG. This is connected to the pressure contact tab 90a of the bus bar 90 which is the power circuit 43 in the relay block 40, and the output terminal 80c is connected to the crimp terminal 91 of the terminal of the electric wire w which is the power circuit 21 in the sub relay block 20. Thus, the power supply circuit 43 of the main relay block 40 and the power supply circuit 21 of the sub relay block 20 are connected via the fuse 80.
In addition, although the relay accommodating part etc. are provided in the case outer surface of the main relay block 40 and the sub relay block 20, illustration is abbreviate | omitted in FIG. 2 (A) and 6 (A).

  In the state where the fuse 80 is connected to the power circuit 43 of the main relay block 40 and the power circuit 21 of the sub relay block 20 as described above, the elastic pinching force of the fuse 80 by the pinching spring 87 of the fuse holder 80 is input to the fuse 80. The terminal 80b and the output terminal 80c are set to be smaller than the locking force that is locked to the fuse terminal insertion portion by the pressure contact tab 90a and the crimp terminal 91. Therefore, when the fuse holder 83 is removed from the main relay block 40 and the sub-relay block 20, the fuse 80 remains on the main relay block 40 and the sub-relay block 20 side while being connected to the power supply circuits 43 and 21, as shown in FIG. Thus, the fuse 80 is attached so as to straddle the main relay block 40 and the sub relay block 20.

Next, another circuit structure including the front end wire harness W / H1 and the main front wire harness W / H2 will be described.
The power line 41 connected to the battery 42 branches after being introduced into the main relay block 40, and the power line connected to the main front wire harness W / H2 is connected to the relays 45 and 49 via fuses 44 and 48, The power supply lines 46 and 50 are connected to the relay contacts 45a and 49a of the relays 45 and 49, while the control lines 47 and 51 are connected to the relay coils 45b and 49b.
The power supply circuit 43 connected to the front end wire harness W / H1 includes the bus bar 90 as described above, and is branched to provide two press contact tabs 90a.

  In the front end module 100, the front end wire harness W / H1 connected to electrical components such as a lamp and a horn is assembled in advance to the front end frame, and the sub relay block 20 is attached to the terminal of the front end wire harness W / H1. Connected.

The power supply line 21 has an upstream terminal connected to the output terminal 80c of the fuse 80 as described above, and a downstream side connected to the relays 24 and 30, respectively.
One power supply line 21A is branched, and one power supply line 25 is provided with a relay contact 24a, and the front end load (2) and front end load are connected to terminals of power supply lines 26 and 27 further branched on the downstream side. (5) is connected, and a relay coil 24b for turning on and off the relay contact 24a is provided on the other control line 28, and a downstream terminal is connected to the connector 70.
The front end load (2) is a left headlamp, and the front end load (5) is a right headlamp.
Similarly, the power supply circuit 21B is also branched on the downstream side, the relay contact 30a is provided on one power supply line 31, and the front end load (1) is connected to the terminals of the power supply lines 32 and 33 further branched on the downstream side. A front end load (4) is connected, a relay coil 30 b is interposed in the other control line 34, and a downstream terminal is connected to the connector 70.
The front end load (1) is a left small lamp or clearance lamp, and the front end load (4) is a right small lamp or clearance lamp.

In the present embodiment, the power line 35 connected to the power line 55 of the main front wire harness W / H2 connected to the power box 56 mounted in the room S2 via the connectors 71 and 70 is connected to the front end wire harness W /. Provided in H1, the power supply line 35 is branched downstream, and a front end load (3) and a front end load (6) are connected to downstream terminals of the branched power supply lines 36 and 37.
The front end load (3) is a left fog lamp, and the front end load (6) is a right fog lamp.

The power lines 46 and 50 of the main front wire harness W / H2 are connected to the load (1) and load (2) mounted in the engine room, and the connector 72 is connected to the terminals of the control lines 47 and 51. Yes. The connector 72 is also connected to a control line 28, 34 of the front end wire harness W / H1 and a control line on the main front wire harness W / H2 side connected via the connectors 70, 71.
The connector 72 is connected to the terminal connector 73 of the instrument panel harness W / H3 in the passenger compartment S2.

  Therefore, between the connectors 70 and 71, one power supply line connecting the indoor power supply box 56 and the front end load (3) (6) and two control lines (signal lines) are connected. It is a pole waterproof connector.

  With the above configuration, the relay block connected to the main front wire harness is divided into the main relay block 40 connected to the main front wire harness W / H2 and the sub relay block 20 connected to the front end wire harness W / H1. The main front wire harness W / H2 and the front end wire harness W / H1 are connected by connecting the power circuit 43 of the main relay block 40 and the power circuit 21 of the sub-relay block 20 via a fuse 80. Therefore, since the connection between the power supply circuits is not a connector connection, an increase in the number of wires and the number of parts associated with the modularization of the front end module 100 can be minimized.

The fuse 80 used for connecting the power supply circuit 43 of the main relay block 40 and the power supply circuit 21 of the sub-relay block 20 is mounted in the fuse holder 83 in advance, and the input terminal 80b of the fuse 80 in the vehicle production line. And the output terminal 80c only need to be connected to the power supply circuits 43 and 21 of the main relay block 40 and the sub-relay block 20 at a time. The provided fuse 80 can be connected without making a mistake.
Further, since the fuse 80 that is required to be interposed in the power supply circuit 43 in the sub relay block 20 is used to connect the power supply circuits 43 and 21 of the main relay block 40 and the sub relay block 20, the number of parts increases. In addition, since it is not necessary to accommodate the fuse 80 in the sub relay block 20, the sub relay block 20 can be downsized.
In this embodiment, the power circuit of the main relay block and the power circuit of the sub-relay block are connected by two fuses, but the connection structure of the present invention is suitable when connecting using a larger number of fuses. Used.

  FIG. 7 shows a second embodiment of the present invention. In this embodiment, before the main relay block 40 and the sub relay block 20 are locked and coupled, the fuse holder 83 is locked and coupled to the main relay block 40 in advance. The input terminal 80b of the fuse 80 attached to the fuse holder 83 is connected to the internal circuit 43 of the main relay block 40.

  As shown in FIG. 7, when the main relay block 40 coupled with the fuse holder 83 is lock coupled with the sub relay block 20, the output terminal 80 c of the fuse 80 protruding from the lower end side of the fuse holder 83 becomes the fuse terminal of the sub relay block 20. It is inserted into the insertion portion 82 and connected to the crimp terminal 91 of the power supply circuit 21. Thereafter, the lock connection between the fuse holder 83 and the main relay block 40 is released, and only the fuse holder 83 is removed from the main relay block 40 and the sub relay block 20.

According to the above configuration, since the fuse holder 83 is assembled to the main relay block 40 in advance in the manufacturing process of the wire harness, the main relay block 40 is connected to the main relay block 40 and the sub relay block 20 on the vehicle production line. The power circuit 43 of the main relay block 40 and the power circuit 21 of the sub relay block 20 can be connected via the fuse 80 at the same time as the sub relay block 20 is locked and coupled.
Note that the fuse holder 83 may be assembled in advance to the sub relay block 20 instead of the main relay block 40.
In addition, since other configurations and operational effects are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  FIG. 8 shows a third embodiment of the present invention. In the main relay block 40 and the sub relay block 20 of this embodiment, the side surface of the insulating case portion 80a of the fuse 80 is formed from the periphery of the fuse terminal insertion portions 81 and 82. The surrounding side wall 88 protrudes upward. The upper end of the side wall 88 is a tapered portion 80a that inclines downward toward the outside.

As shown in FIG. 8A, when the fuse holder 83 is attached to the main relay block 40 and the sub-relay block 20 that are locked together in the same manner as in the first embodiment, the side walls of the main relay block 40 and the sub-relay block 20 As shown in FIG. 8B, 88 is inserted between the outer surface of the fuse 80 attached to the fuse holder 83 and the inner surface of the sandwiching spring 87, and the sandwiching spring 87 is expanded outward by the side wall 88 so that the sandwiching spring is expanded. The pinching of the fuse 80 by 87 is released. Therefore, only the fuse holder 83 can be removed from the main relay block 40 and the sub relay block 20.
In addition, since another structure and effect are the same as that of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

FIG. 9 shows a fourth embodiment of the present invention. In this embodiment, the fuse holder 83 is pre-assembled to the main relay block 40 in the same manner as the second embodiment. Specifically, as shown in FIG. 9A, a lock piece 83b projects downward from the lower end surface of one side wall 83a in the parallel direction of the fuse 80, and a lock provided at the tip of the lock piece 83b. The claw 83c is locked to the inner peripheral edge of the through hole 40b formed in the upper wall 40a of the main relay block 40. The lock claw 83c is provided inside the fuse holder of the lock piece 83b.
On the other hand, on the upper wall 20a of the sub-relay block 20, a taper portion that is inclined downward toward the adjacent main relay block 40 side at a portion where the other side wall 83d facing the one side wall 83a of the fuse holder 83 is placed. 20b is provided.

As shown in FIG. 9B, when the main relay block 40 combined with the fuse holder 83 is lock-coupled with the sub-relay block 20, the output of the fuse 80 protruding from the lower end side of the fuse holder 83 is the same as in the second embodiment. The terminal 80 c is inserted into the fuse terminal insertion portion 82 of the sub relay block 20 and connected to the crimp terminal 91 of the power supply circuit 21. At this time, the lower end surface of the other side wall 83d of the fuse holder 83 abuts on the tapered portion 20b of the sub relay block 20, and the fuse holder 83 moves along the tapered portion 20b toward the main relay block 40 (in the arrow direction in the figure). To do. As a result, the locking claw 83c of the lock piece 83b provided on the one side wall 83a of the fuse holder 83 is released from the main relay block 40, and the fuse holder 83 can be removed from the main relay block 40.
Although the fuse holder 83 moves to the main relay block 40 side, the clamping spring 87 in the fuse holder 83 bends, so that the fuse 80 remains held at the proper mounting position and moves to the main relay block 40 side. There is no.

According to the above configuration, the lower end surface of the other side wall 83 d of the fuse holder 83 is in contact with the outer surface of the upper wall 20 a of the sub relay block 20, and the output terminal 80 c of the fuse 80 is connected to the power circuit 21 of the sub relay block 20. Until then, the lock coupling between the fuse holder 83 and the main relay block 40 cannot be released. Therefore, when the fuse holder 83 can be removed, the fuse 80 is reliably connected to the power supply circuit 21 of the sub-relay block 20, and the reliability of electrical connection can be improved.
In addition, since another structure and an effect are the same as that of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

It is a circuit diagram of a 1st embodiment of the present invention. The state which connected the power supply circuit of the main relay block and the power supply circuit of a sub relay block via the fuse is shown, (A) is a perspective view, (B) is sectional drawing. 6 is a diagram illustrating a method of mounting a fuse in a fuse holder. A fuse holder is shown, (A) is an AA line sectional view, (B) is a BB line sectional view. It is sectional drawing which shows the state which attached the fuse to the fuse holder. The state which assembled | attached the fuse holder to the main relay block and the sub relay block is shown, (A) is a perspective view, (B) is sectional drawing. (A) (B) is drawing which shows 2nd Embodiment of this invention. (A) (B) is drawing which shows 3rd Embodiment of this invention. (A) (B) is drawing which shows 4th Embodiment of this invention. It is drawing which shows a prior art example. It is drawing which shows the example of the circuit diagram of a prior art example.

Explanation of symbols

20 Sub relay block 21 Power supply circuit 40 Main relay block 43 Power supply circuit 80 Fuse 83 Fuse holder 90 Bus bar 90a Pressure contact tab 91 Crimp terminal 100 Front end module S1 Engine room S2 Car interior W / H1 Front end wire harness W / H2 Main front wire Harness W / H3 Instrument panel harness w Electric wires constituting the power circuit in the sub-relay block

Claims (4)

While providing a front end module in which an electric component including a lamp and a horn and a front end wire harness connected to the electric component are pre-assembled on a front end frame of an automobile,
The relay block connected to the power source and mounted in the engine room is divided into a main relay block connected to the main front wire harness and a sub relay block connected to the front end wire harness,
In the main relay block, the power circuit connected to the front end wire harness extends the power circuit to the sub relay block without passing through a relay, and the power circuit and the power circuit of the sub relay block are connected to each other. Connected via a fuse, the fuse is previously mounted in a fuse holder, and the fuse holder is mounted at the boundary position between the main relay block and the sub relay block adjacent to each other, and is mounted in the fuse holder. The input terminal of each fuse being inserted and locked to the fuse terminal insertion portion of the main relay block, while the output terminal is inserted and locked to the fuse terminal insertion portion of the sub-relay block, and
A wire harness connection structure for a front end module, wherein the power circuit in the sub relay block is connected to a front end wire harness via a relay.   The input terminal or output terminal of each fuse mounted in the fuse holder is inserted and locked into the fuse terminal insertion part of the main relay block or the fuse terminal insertion part of the sub relay block, and the fuse holder is connected to the main relay block. The wire harness connection structure for a front end module according to claim 1, wherein the wire harness connection structure is pre-assembled in any one of the sub relay block and the sub relay block.   The fuse holder includes a box having a rectangular parallelepiped lower surface opening, and includes a holding portion that detachably holds the insulating case portions of the plurality of fuses in parallel, and protrudes from the lower surface of the insulating case portion held by the holding portion. 3. The structure according to claim 1, wherein when the input terminal and the output terminal are inserted and locked in the fuse terminal insertion portion of the main relay block and the sub relay block, the input terminal and the output terminal can be detached from the insulating case portion and removed. Front harness module wire harness connection structure.   The holding portion of the fuse holder has the receiving recesses of the insulating case portions of the fuses arranged in parallel via a partition wall, and a holding spring is provided on the opposing inner surface of each receiving recess to elastically hold the insulating case portion. The holding force is smaller than the locking force at which the input terminal and the output terminal are locked at the fuse terminal insertion portion, and the fuse is mounted so as to straddle the main relay block and the sub-relay block, and then upward. The wire harness connection structure for a front end module according to claim 3, wherein the wire harness connection structure is configured to be removable.

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