JP2011159497A - Electronic control unit mounting structure to wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance vibration resistance and impact resistance of an electronic control unit, to improve assembling property of the electronic control unit and wire harness, and to miniaturize the wire harness. <P>SOLUTION: The electronic control unit 21 includes a printed board 22 inside a case 30, and also includes, at one end at least of the case, a connector portion 44 (43) in which a board terminal 24 connected to a conductor of the printed board 22, and a joint terminal 25 not connected to the conductor, are arranged. A connector 15 (14) connected to the terminal of the wire harness 10 is fitted and connected to the connector portion 44 (43) of the electronic control unit 21. A portion of electric wires that constitute the wire harness 10 is connected to the conductor of the printed board 22, and the electric wires of the wire harness 10 are joined to one another through the joint terminal 25. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a structure for mounting an electronic control unit to a wire harness, and more particularly, to a wire harness that is routed to a vehicle on a vehicle assembly line, in which the electronic control unit is previously attached to the wire harness before the vehicle is routed. In particular, the connection between the wire harness and the electronic control unit is simplified.

The wire harness routed in the vehicle is connected to various electric devices and is also connected to an electronic control unit for controlling these electric devices. Conventionally, the connection between the electronic control unit and the wire harness is often performed by connecting the wire harness to the electronic control unit fixed to the vehicle body. In this case, it is necessary to route the wire harness to connect to the electronic control unit. there were.
Therefore, there is a demand for a wire harness with an electronic control unit in which an electronic control unit is assembled in advance on the wire harness side in order to reduce the cost by eliminating the wiring harness and to reduce the size of the entire unit.

In order to satisfy the above requirement, Japanese Patent Laid-Open No. 2000-251966 (Patent Document 1) proposes an electronic control unit for mounting a wire harness shown in FIG.
Specifically, the electronic control unit 2 has the electronic component 4 mounted on the substrate 3 and a press contact terminal 5 connected to the conductor of the substrate 3. The press contact terminal 5 and the wire 1 a of the wire harness 1 are press contacted. The wire harness 1 and the electronic control unit 2 are electrically connected to each other, and the electronic control unit 2 and the wire harness 1 are integrally covered with a covering member 6 such as a heat-shrinkable tube so that the wire harness 1 is electronically connected. The control unit 2 is assembled in advance.

However, since the electronic control unit 2 is press-contacted with the electric wire 1a of the wire harness 1 via the press-contact terminal 5, the assembly workability between the electronic control unit 2 and the wire harness 1 is poor and takes time. There are challenges.
Further, since the electronic control unit 2 is only covered with the covering member 6, there is a problem in that it is vulnerable to vibration and impact.

  Further, in the conventional wire harness, when a part of the wires constituting the wire harness is connected to the electronic control unit and the other part of the wires are joint-connected to each other, the joint connector is connected to the terminal of the joint-connected wire. Alternatively, an operation such as welding the end of the electric wire and covering with an insulating resin cap is necessary. For this reason, there are problems that the number of work steps and the number of parts increase and the entire wire harness is enlarged.

JP 2000-251966 A

  The present invention has been made in view of the above problems, and in the electronic control unit mounting structure to the wire harness in which the electronic control unit is mounted in advance on the wire harness before the vehicle is installed, the electronic control unit and the wire harness are assembled. It is an object to improve the vibration resistance and impact resistance of the electronic control unit and to further reduce the size of the wire harness.

In order to solve the above-mentioned problem, the present invention connects an electronic control unit in advance to a wire harness routed in a vehicle,
The electronic control unit includes a printed circuit board inside the case, and includes at least one end of the case with a connector portion in which a board terminal connected to a conductor of the printed circuit board and a joint terminal not connected to the conductor are arranged, The connector connected to the wire harness terminal is fitted and connected to the connector portion, and a part of the electric wire constituting the wire harness is connected to the conductor of the printed circuit board, and the wire harness is connected via the joint terminal. Provided is an electronic control unit mounting structure for a wire harness characterized by jointing wires.

  Since the electronic control unit mounting structure to the wire harness having the above configuration accommodates the electronic control unit in the case, it is possible to improve vibration resistance and impact resistance of the electronic control unit. In addition, since the connector part is provided with a connector part at least at one end and a connector connected to the terminal of the wire harness is fitted and connected to the connector part, the assembly workability between the wire harness and the electronic control unit can be improved. it can.

  In addition, since the electronic control unit is also provided with a joint terminal that is not connected to the conductor of the printed circuit board, the connection between the electric wire and the conductor of the printed circuit board and the joint between the electric wires can be performed in one connector fitting operation. Both connections can be made. Therefore, in order to joint the electric wires constituting the wire harness, there is no need to provide a joint connector at another position and joint can be performed, so that the number of components and connection work can be reduced, and the wire harness The overall enlargement can be suppressed.

The electronic control unit includes the connector portions at both ends of the case, and connects the connectors respectively connected to the terminals of the first branch line and the second branch line branched from the trunk line of the wire harness. It is preferable that each is fitted and connected.
Thereby, the structure of the wire harness which can perform efficiently the joint of two places by the side of a wire harness on both sides of one electronic control unit can be simplified.

Specifically, the case of the electronic control unit is formed with a connector fitting recess for projecting the board terminal and the joint terminal arranged on one end side of the printed board on one side of the case body.
The other side of the case body is an opening, and after the printed board is inserted through the opening, a connector housing provided with a connector fitting recess is connected to the case body, and the connector housing is connected to the printed board. It is preferable that the board terminal and the joint terminal arranged on the end side are protruded.

  In the wire harness, the electronic control unit is mounted on the main line, and the electronic control unit is fixed on the wire harness by winding an adhesive tape or a fastening band. Further, a protective member such as a rubber sheet or a foamed resin sheet may be wound.

It is preferable that a positioning / holding portion for the trunk line of the wire harness is provided on the outer surface of the case of the electronic control unit. Thereby, it becomes easy to position and fix the trunk line of the wire harness at a desired position of the electronic control unit, and the workability is further improved.
Specifically, on the outer surface of the case, a groove-like recess for fitting the trunk wire of the wire harness is formed, or a crescent-shaped receiving portion for holding the trunk wire of the wire harness is protruded, or the wire harness For example, a clip portion that can be temporarily fixed while sandwiching the main line is projected.

  Needless to say, a frame-like structure that can accommodate and fix the trunk of the wire harness may be provided on the outer surface of the case. In this case, the adhesive tape, the fastening band, etc. for fixing the trunk line of the wire harness and the electronic control unit become unnecessary, and further cost reduction can be achieved.

  On the outer surface of the case of the electronic control unit, a clamp for locking to the vehicle body panel may be projected. Thereby, the effort which attaches the clamp for body fixing to a wire harness can be saved, and workability | operativity can be improved.

  As described above, according to the present invention, a connector portion is provided on at least one end of the case containing the electronic control unit, and the connector connected to the terminal of the wire harness is fitted and connected to the connector portion of the electronic control unit. Since the control unit and the wire harness are assembled, the workability of the assembly is improved. Further, by housing the electronic control unit in the case, it is possible to improve the vibration resistance and impact resistance of the electronic control unit.

  Furthermore, joint terminals that are not connected to the printed circuit board conductor are also arranged in the case of the electronic control unit, so that the connection between the printed circuit board conductor and the joint connection between the wires can be performed in one case. Since both can be performed, the number of components and connection work can be reduced, and the entire wire harness can be reduced in size.

  Furthermore, by providing the connector at both ends of the case, the first branch line and the second branch line branched from the main line of the wire harness can be connected to the electronic control unit without special handling. Therefore, it is possible to deal with various wiring designs by reducing the number of harnesses.

(A) is a partially transparent perspective view of 1st embodiment of this invention, (B) is explanatory sectional drawing which shows the structure in an electronic control unit. It is a disassembled perspective view of the electronic control unit shown in FIG. It is a perspective view of the opposite side surface of the printed circuit board shown in FIG. 2 and a joint terminal. It is a schematic sectional drawing of the state which wound the adhesive tape around the electronic control unit and wire harness shown in FIG. It is a schematic sectional drawing which shows the modification 1 of 1st Embodiment. The modification 2 of 1st Embodiment is shown, (A) is a front view, (B) is a schematic sectional drawing. It is a schematic sectional drawing which shows the modification 3 of 1st Embodiment. It is a schematic sectional drawing which shows the modification 4 of 1st Embodiment. It is a schematic sectional drawing which shows the modification 5 of 1st Embodiment. The wire harness with an electronic control unit which concerns on 2nd Embodiment of this invention is shown, (A) is a perspective view, (B) is a schematic side view. It is a schematic side view which shows the state which fixed the large diameter trunk line of the wire harness to the electronic control unit shown in FIG. It is a schematic side view which shows the modification 1 of 2nd Embodiment. It is a schematic side view which shows the modification 2 of 2nd Embodiment. It is a schematic side view which shows the modification 3 of 2nd Embodiment. It is a partially transparent perspective view of 3rd Embodiment of this invention. It is a perspective view of 4th Embodiment of this invention. It is a figure which shows a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a first embodiment of the present invention.

  The wire harness 10 is configured by an electric wire that is routed in a vehicle and connected to an in-vehicle device. As shown in FIG. 1A, the wire harness 10 branches the first branch line 12 and the second branch line 13 from the trunk line 11, and connects the first connector 14 to the terminal of the first branch line 12. The second connector 15 is connected to the terminal of the second branch line 13. Each of the branch lines 12 and 13 includes an electric wire connected to the conductor of the printed circuit board 22 of the electronic control unit 21 and an electric wire joint-connected to each other.

  As shown in FIG. 2, the electronic control unit 21 accommodates a printed circuit board 22 inside a case 30 made of a resin molded product. As shown in FIG. 3, the printed circuit board 22 has various electronic components 23 mounted thereon and a wiring pattern (not shown) made of a conductor. A plurality of board terminals 24 connected to the conductor are bent and projected in an L shape from both ends in the length direction of the printed board 22.

  The case 30 is formed of a box-shaped case main body 31 having an opening on one side in the length direction, and a separate connector housing portion 32 that is attached to the opening 33 of the case main body 31. Yes.

The other side in the length direction of the case body 31 is closed by a bottom wall 34 provided with a through hole 35 through which the substrate terminal 24 passes, as shown in FIGS. A connector fitting recess 36 for fitting the first connector 14 is formed outside the wall 34.
The joint terminals 25 not connected to the conductors of the printed circuit board 22 are press-fitted or insert-molded into the bottom wall 34 inside both sides of the case main body 31 in the length direction, and the joint terminals 25 are inserted into the connector fitting recesses. It projects into 36.
Lock claws 40 project from the outer surfaces of the pair of peripheral walls facing the case body 31 at a position near the opening 33.

As shown in FIGS. 1B and 2, the connector housing portion 32 is formed of a female housing having a connector fitting recess 37 into which the second connector 15 connected to the wire harness is fitted. The bottom of the connector fitting recess 37 is closed by a bottom wall 38 provided with a through hole 39 through which each board terminal 24 passes. The joint terminal 25 is press-fitted or insert-molded into the bottom wall 38 and protrudes into the connector fitting recess 37.
On the outer surfaces of the pair of side walls of the connector housing portion 32, a lock frame portion 41 that locks the lock claw 40 of the case main body portion 31 protrudes.

Next, the assembly process of the electronic control unit 21 will be described.
First, the printed circuit board 22 is inserted from the opening 33 of the case body 31, and the board terminal 24 arranged on one end side of the printed circuit board 22 is passed through the through hole 35 of the bottom wall 34 to enter the connector fitting recess 36. The first connector portion 43 is formed together with the joint terminal 25 already fixed in the case main body 31 and protruding into the connector fitting recess 36.

  Next, the connector housing part 32 is attached to the opening 33 of the case body part 31, and the board terminal 24 arranged on the other end side of the printed board 22 is passed through the through hole 39 of the bottom wall 38 of the connector housing part 32 to fit the connector. The second connector portion 44 is formed by projecting into the mating recess 37. The joint terminal 25 is press-fitted or insert-molded in the bottom wall 38 as described above.

  Finally, the lock claw 40 of the case body 31 and the lock frame 41 of the connector housing part 32 are locked and locked, and the case body 31 and the connector housing part 32 are coupled.

Next, an operation for assembling the electronic control unit 21 to the wire harness 10 will be described. First, the electronic control unit 21 is disposed on the trunk line 11 of the wire harness 10, and the first connector 14 connected to the terminal of the first branch line 12 is fitted into the first connector portion 43 of the electronic control unit 21. Further, the second connector 15 connected to the terminal of the second branch line 13 is fitted into the second connector portion 44 of the electronic control unit 21.
A part of the electric wires of the first branch line 12 and a part of the electric wires of the second branch line 13 are connected to the conductor of the printed circuit board 22, and the other electric wires of the first branch line 12 and the other of the second branch line 13 Are joint-connected through joint terminals 25, respectively.

  Next, as shown in FIG. 4, with the trunk line 11 of the wire harness 10 disposed in the center in the width direction of the electronic control unit 21, the adhesive tape 51 is wound around the outer periphery of the electronic control unit 21 and the trunk line 11, The electronic control unit 21 is fixed on the wire harness 10. Instead of the adhesive tape 51, a fastening band may be wound and fixed.

  In the structure in which the electronic control unit 21 is connected to the wire harness 10 having the above-described configuration, the electronic control unit 21 is configured by housing a printed circuit board 22 to which each electronic component 23 and board terminal 24 are fixed in a case 30, and the case A first connector portion 43 and a second connector portion 44 are formed at both ends of the 30. By fitting the first connector 14 and the second connector 15 connected to the terminals of the branch lines 12 and 13 of the wire harness 10 to the first and second connector portions 43 and 44, respectively, the electronic control unit 21 and The connection work with the wire harness 10 can be easily completed. Therefore, the workability of assembling the electronic control unit 21 and the wire harness 10 can be greatly improved compared to the conventional example in which the terminals of the electronic control unit are press-connected to the wires of the wire harness.

  In addition, by accommodating the printed circuit board 22 in the case 30, the vibration resistance and impact resistance of the electronic control unit 21 can be improved.

  Further, since the joint terminal 25 not connected to the conductor of the printed circuit board 22 is also arranged in the case 30 of the electronic control unit 21, the electric wire connected to the conductor of the printed circuit board 22 and the electric wire connected to the conductor of the printed circuit board 22 are connected. Is connected to one connector 14 (15), and the connector 14 (15) is fitted to the connector portion 43 (44), thereby connecting the conductor of the printed circuit board 22 and the electric wire and jointing the other electric wires. Both connections can be completed. This eliminates the need for a joint connector separate from the connector of the wire harness terminal, and eliminates the need for special joint connection work such as conventional welding connection and insulation treatment, thereby reducing the number of parts and the number of work steps. At the same time, the overall size of the wire harness 10 can be reduced.

  A protective member 52 made of a rubber sheet or the like is further wound around the outer periphery of the adhesive tape 51 as in Modification 1 of the first embodiment shown in FIG. 5 around the main line 11 of the electronic control unit 21 and the wire harness 10. May be.

  When the vehicle body fixing clamp 53 is attached to the trunk line 11 of the wire harness 10, the board portion of the clamp 53 along the trunk line 11 as in Modification 2 of the first embodiment shown in FIGS. 53a is arranged, and the adhesive tape 51 used for fixing the electronic control unit 21 and the main line 11 is also wound around the board portion 53a, so that the electronic control unit 21, the main line 11 and the clamp 53 are fixed integrally. Good.

A structure for positioning and holding the trunk line 11 may be provided on the circumferential wall 30 a that contacts the trunk line 11 of the wire harness 10 in the circumferential wall of the case 30. Specifically, one of the following configurations is employed.
That is, as in Modification 3 of the first embodiment shown in FIG. 7, the receiving portion 45A having a crescent cross section extending in the length direction of the case 30 is integrally formed along the center line in the width direction of the peripheral wall 30a. Project.
Alternatively, as in Modification 4 of the first embodiment shown in FIG. 8, a groove-like recess 45B for fitting the trunk line 11 to the peripheral wall 30a is provided along the center line in the width direction of the peripheral wall 30a.
Alternatively, as in Modification 5 of the first embodiment shown in FIG. 9, one or a plurality of clip portions 45C that sandwich the trunk line 11 from both sides in the width direction are integrally projected from the center portion in the width direction of the peripheral wall 30a. .

  By providing the positioning and holding structure for the trunk line 11 in the case 30 as described above, the trunk line 11 of the wire harness 10 can be temporarily fixed at the center position in the width direction of the case 30. The workability of wrapping and fixing with 21 can be improved.

10 and 11 show a second embodiment of the present invention.
In the present embodiment, the case 30 of the electronic control unit 21 is provided with a main wire fixing portion 46 for positioning and holding the main wire 11 of the wire harness 10 and a vehicle body fixing clamp portion 49.
The trunk wire fixing portion 46 includes a U-shaped housing frame portion 47 projecting from a peripheral wall 30 a that contacts the trunk wire 11 in the case 30, and a pair of spring holding pieces 48 projecting from the inside of the housing frame portion 47. It consists of.

As shown in FIGS. 10A and 10B, the housing frame 47 has a pair of side walls 47a and 47b protruding from the peripheral wall 30a, and a hinge 47c at the tip of one side wall 47a. And a fixed piece 47d connected to be freely opened and closed. By engaging a locking portion 47e provided on the free end side of the fixed piece 47d with a locked portion 47f provided at the tip of the other side wall 47b, the receiving frame portion 47 can be locked in a closed state. Yes.
The pair of spring holding pieces 48 project from the inside of the fixed piece 47d, and the distal ends on the free end side are urged toward each other.

  The vehicle body fixing clamp portion 49 has a shaft portion 49 a protruding from the outer surface of the peripheral wall 30 b facing the peripheral wall 30 a of the case 30. A locking blade portion 49b inserted and locked in a locking hole (not shown) of the vehicle body is folded and projected from the tip of the shaft portion 49a.

When the trunk line 11 of the wire harness 10 is fixed to the trunk line fixing part 46, as shown in FIG. 10B, the fixing piece 47d is opened and the trunk line 11 is inserted into the housing frame part 47. Is arranged along the center in the width direction of the peripheral wall 30a of the case 30 of the electronic control unit 21, and the fixing piece 47d is closed as it is to lock the locking portion 47e and the locked portion 47f.
As a result, the trunk line 11 enters between the pair of spring holding pieces 48 and is pressed against the peripheral wall 30a of the case 30 by the spring force of the spring holding pieces 48, so that the spring holding piece 48 and the peripheral wall 30a of the case 30 It is clamped from above, below, left and right, and fixed so as not to be displaced.

  Further, since the spring holding piece 48 opens and closes according to the diameter of the main line 11 to be sandwiched, for example, when the main line 11 has a large diameter, the left and right spring holding pieces 48 are opened as shown in FIG. Thus, it is possible to cope with fixing of trunk lines having various diameters, such as expansion of the accommodation space of the trunk line 11.

Thus, by providing the trunk 30 with the trunk fixing portion 46 that can handle trunks of various diameters, the electronic control unit 21 and the trunk 11 can be easily fixed, improving workability, Since a protective member is not necessary, cost reduction can be achieved.
In addition, since the vehicle body fixing clamp portion 49 is integrally provided in the case 30, it is possible to save the trouble of attaching a separate clamp for fixing the vehicle body, and from this point, workability can be improved and the number of parts can be reduced. Can do.

In addition, it is good also as the following structure.
As in Modification 1 of the second embodiment shown in FIG. 12, the trunk line fixing part 46 and the vehicle body fixing clamp part 49 are added to Modification 3 of the first embodiment.
Alternatively, as in Modification 2 of the second embodiment shown in FIG. 13, the trunk line fixing portion 46 and the vehicle body fixing clamp portion 49 are added to Modification 4 of the first embodiment.
Or like the modification 3 of 2nd Embodiment shown in FIG. 14, the said trunk line fixing | fixed part 46 and the said vehicle body fixing clamp part 49 are added and provided in the modification 5 of 1st Embodiment.

  As in Modifications 1 to 3 of the second embodiment, the positioning and holding structures 45 </ b> A to 45 </ b> C of the trunk line 11 and the trunk line fixing portion 46 are provided in the case 30, thereby shifting the position of the trunk line 11 with respect to the electronic control unit 21. Can be more reliably prevented, and the fixing workability between the electronic control unit 21 and the main line 11 can be further improved.

FIG. 15 shows a third embodiment of the present invention.
In the present embodiment, only one bundle of branch lines 13 is branched from the trunk line 11 of the wire harness 10, and the connector part 44 is formed only on one side in the length direction of the case 30 of the electronic control unit 21. .
Specifically, the electronic control unit 21 is disposed on the main line 11 of the wire harness 10, and the second connector 15 connected to the terminal of the branch line 13 is fitted and connected to the connector portion 44. The electronic control unit 21 is fixed on the main line 11 by winding an adhesive tape 51 around the outer periphery of the electronic control unit 21.

FIG. 16 shows a fourth embodiment of the present invention.
In this embodiment, the branch line is not branched from the trunk line 11 of the wire harness 10, the second connector 15 is connected to the terminal of the trunk line 11, and the case 30 of the electronic control unit 21 is attached to one side in the length direction. Only the connector portion 44 is formed, and the second connector 15 is fitted and connected to the connector portion 44.

DESCRIPTION OF SYMBOLS 10 Wire harness 11 Trunk line 12 1st branch line 13 2nd branch line 14 1st connector 15 2nd connector 21 Electronic control unit 22 Printed circuit board 24 Board terminal 25 Joint terminal 30 Case 31 Case main-body part 32 Connector housing part 43 1st connector Part 44 Second connector part

Claims (6)

The electronic control unit is connected in advance to the wire harness routed in the vehicle,
The electronic control unit includes a printed circuit board inside the case, and includes at least one end of the case with a connector portion in which a board terminal connected to a conductor of the printed circuit board and a joint terminal not connected to the conductor are arranged, The connector connected to the wire harness terminal is fitted and connected to the connector portion, and a part of the electric wire constituting the wire harness is connected to the conductor of the printed circuit board, and the wire harness is connected via the joint terminal. Electronic control unit mounting structure to a wire harness, characterized in that the electric wires are joined together.   The electronic control unit includes the connector portions at both ends of the case, and connects the connectors respectively connected to the terminals of the first branch line and the second branch line branched from the trunk line of the wire harness to the connector of the electronic control unit. The attachment structure of the electronic control unit to the wire harness according to claim 1, which is fitted and connected to each of the parts. While the case of the electronic control unit is formed with a connector fitting recess for projecting the board terminal and the joint terminal arranged on one end side of the printed circuit board on one side of the case body part,
The other side of the case body is an opening, and after the printed board is inserted through the opening, a connector housing provided with a connector fitting recess is attached, and the connector housing is disposed on the other end side of the printed board. The structure for attaching an electronic control unit to a wire harness according to claim 1 or 2, wherein the board terminal and the joint terminal are protruded and a connector part for fitting a connector on the wire harness side is provided at both ends of the case. .   4. The electronic control unit according to claim 2, wherein the electronic control unit is mounted on a main line of the wire harness, the adhesive tape is wound or a fastening band is wound, and the electronic control unit is fixed on the wire harness. Electronic control unit mounting structure to wire harness.   The electronic control unit mounting structure to a wire harness according to any one of claims 2 to 4, wherein a positioning and holding portion for the trunk line of the wire harness is provided on an outer surface of the case of the electronic control unit.   The electronic control unit mounting structure for a wire harness according to any one of claims 1 to 5, wherein a clamp for locking to a vehicle body panel projects from an outer surface of a case of the electronic control unit.

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