JP2012135092A - Connection structure of wiring harness and control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure of a wiring harness and a control device which reduces the number of components and also reduces the size.SOLUTION: This invention relates to a structure for connecting a control board 31 of a control device 2, in which the control board 31 controlling electrical components mounted on a vehicle is housed between upper and lower cases 11, 21, with a wiring harness 5. Core wire parts 41a, 42a, 43a of electric wires 41, 42, 43 are held by the upper and lower cases 11, 21 while being placed on circuit patterns 33, 34, 35 of the control board 31. The structure connects the wiring harness 5 with the control board 31.

Description

  The present invention relates to a connection structure that connects a control device that controls an electrical component mounted on a vehicle and a wire harness that supplies electric power from a battery to the electrical component.

  In a vehicle, in order to control lighting of a plurality of lamps such as indoor lamps and foot lamps as electrical components, these lamps are connected via a control device that is an electrical connector with a built-in main ECU (Electronic Control Unit) and a control board. Connected by a wire harness. This wire harness is composed of a plurality of electric wires such as a power line, a ground line, a communication line, etc., and the main ECU is controlled by fitting the connector of the terminal of the wire harness drawn from the main ECU with the connector on the control device side. The device is connected.

  Patent Document 1 describes a structure using a connector 117 to connect the main ECU 100 and the control device 110. 9 and 10 show the structure described in Patent Document 1. FIG. As shown in FIG. 9, a plurality of control devices 110 connected to electrical components mounted on a vehicle and a main ECU 100 that controls the electrical components are connected by a wire harness including a plurality of electric wires 120, 121, and 122. Is done. The plurality of control devices 110 are connected to the main ECU 100 in series.

  FIG. 10 shows one of the plurality of control devices 110, which includes a load-side connector portion 111 and an ECU-side connector portion 113, and the load-side connector portion 111 has a wire harness terminal drawn from an electrical component. The connector is fitted to connect the control device 110 and the electrical component, and the ECU side connector portion 113 is fitted to the connector 117 of the terminal of the electric wires 120, 121, 122 to connect the main ECU 100 and the control device 110. . Thereby, the main ECU 100 is connected to the electrical component via the control device 110.

  The electric wires 120, 121, 122 drawn from the main ECU 100 are input lines 120a, 121a, 122a on the ECU 100 side, and output lines 120b, 121b drawn from the control device 110 connected to these input lines 120a, 121a, 122a. , 122b, and the output lines 120b, 121b, 122b are input lines to the other control device 110. Further, the input lines 120 a, 121 a, and 122 a to the control device 110 are connected to a control board built in the control device 110.

  In addition, as a method of connecting the main ECU 100 and the control board in the control device 110, connecting the electric wire and the control board in the control device using a press contact terminal has been conventionally performed. However, when using the press contact terminal, A thick electric wire with a large diameter cannot be connected, and it is difficult to process the electric wire for pressure welding, which is problematic in practice.

JP 2006-62594 A

     However, in the conventional structure, in order to connect the electrical components via the main ECU 100 and the control device 110, the ECU side connector portion 113 for connecting the main ECU 100 and the control device 110, the connector 117 of the wire harness terminal, the control device 110. And a connector load side connector portion 111 for connecting the electrical component to the electrical component.

  For this reason, there is a problem that the number of parts increases. Further, since the connection is made by the connector 117, the connection structure is restricted by the size of the connector 117, and the control device 110 cannot be downsized.

  Therefore, an object of the present invention is to provide a connection structure between a wire harness and a control device that can reduce the number of parts and can be miniaturized by adopting a connection structure that does not use a connector. .

  According to a first aspect of the present invention, there is provided a wire harness that connects the control board of a control device in which a control board for controlling an electrical component mounted on a vehicle is accommodated between upper and lower cases and a wire harness composed of a plurality of electric wires. And a control device, wherein the wire harness and the control board are connected by being sandwiched by the upper and lower cases in a state where the core portion of the electric wire is placed on the circuit pattern of the control board. And

Invention of Claim 2 is invention of Claim 1, Comprising: The said electric wire is formed with the core wire part and the coating | coated part which coat | covers this core wire part, The core wire part from which the said coating | coated part was peeled off is the said, It is mounted on a circuit pattern.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein a rib for pressing the core portion of the electric wire on the circuit pattern of the control board is formed in one of the upper and lower cases. It is characterized by.

Invention of Claim 4 is invention of any one of Claims 1-3, Comprising: Solder is arrange | positioned between either one of the said upper and lower cases, and the said core wire part. Features.

 Invention of Claim 5 is invention of any one of Claims 1-4, Comprising: Positioning which positions the said wire harness on the circuit pattern of a control board in any one of the said upper and lower cases A groove is provided.

   According to the first aspect of the present invention, the wire harness and the control board can be directly connected by placing the core portion of the electric wire on the circuit pattern of the control board and holding the electric wire between the upper and lower cases. . For this reason, connection using a connector becomes unnecessary, and connection without a connector is possible. Since the connector can be omitted, the number of parts can be reduced and the size can be reduced.

   According to the second aspect of the present invention, since the core wire portion is exposed by peeling off the covering portion, and this core wire portion can be mounted and connected to the circuit pattern of the control board, the core wire portion is connected to the circuit pattern. This eliminates the need for parts to be connected and enables connection with a small number of parts.

  According to the invention described in claim 3, since the rib is formed on either of the upper and lower cases, and this rib presses the core wire portion of the electric wire onto the circuit pattern of the control board, the core wire portion and the circuit pattern are securely connected. It can be made to contact and a wire harness and a control board can be connected stably.

  According to the invention described in claim 4, since the solder is provided between the core wire portion and one of the upper and lower cases, and the core wire portion and the circuit pattern are connected via the solder, the core wire portion and the circuit The pattern can be reliably contacted, and the wire harness and the control board can be stably connected.

  According to the fifth aspect of the present invention, the wire harness can be positioned on the circuit pattern of the control board by forming the electric wire positioning groove in one of the upper and lower cases. Thereby, there is no position shift with an electric wire and a circuit pattern, and a wire harness and a control board can be connected reliably.

It is a disassembled perspective view which shows the connection structure of the wire harness of 1st Embodiment of this invention, and a control apparatus. It is a perspective view which shows the connection structure of 1st Embodiment of this invention. It is sectional drawing which shows the engaging part of the upper case and lower case in 1st Embodiment of this invention. It is sectional drawing which shows the connection part in 1st Embodiment of this invention. It is the sectional view on the AA line in FIG. It is sectional drawing which shows 2nd Embodiment which provided the rib in the connection part facing the core wire part. It is sectional drawing which shows 3rd Embodiment which provided the solder in the connection part facing the core part. It is sectional drawing which shows 4th Embodiment which provided the acicular protrusion in the connection part facing the core wire part. It is a top view which shows the conventional connection structure using a connector. It is a disassembled perspective view which shows the connector used for the conventional connection structure.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. Note that, in each embodiment, the same member is assigned the same reference numeral (first embodiment).
1 to 5 show a connection structure 1 according to a first embodiment of the present invention, FIG. 1 is an exploded perspective view of the whole, FIG. 2 is a perspective view of a connected state, and FIG. 3 is a lower case 11 and an upper case 21. FIG. 4 is a cross-sectional view showing the connection portion, and FIG. 5 is a cross-sectional view taken along line AA of FIG.

  The connection structure 1 connects the control device 2 and the wire harness 5. As shown in FIGS. 1 and 2, the control device 2 includes a lower case 11, an upper case 21, and a control board 31. ing.

The control device 2 is connected to an electrical component (not shown) to connect a main ECU (see FIG. 9) that controls the operation of the electrical component and the electrical component. The control board 31 in the control device 2 drives and controls the electrical components based on a control signal from the main ECU. Therefore, a circuit pattern 32 is formed on the control board 31 for the board body 36 to distribute the power from the in-vehicle battery to the electrical components, cut off the power, and perform other operations. Reference numerals 33, 34, and 35 denote a first connection electrode portion, a second connection electrode portion, and a third connection electrode portion that constitute a part of the circuit pattern 32, and all are formed so as to be exposed from the upper surface of the substrate body 36. (See FIG. 4). These connection electrode portions 33, 34, and 35 can be electrically connected to the wire harness 5 by being exposed from the upper surface of the substrate body 36.

The control board 31 is accommodated in the lower case 11 and the upper case 21. Further, the control board 31 is sandwiched between the lower case 11 and the upper case 21. In this embodiment, the partition plate 12 and the upper case 21 formed inside the lower case 11 as shown in FIG. Is sandwiched between.

Both the lower case 11 and the upper case 21 are made of resin. The upper case 21 is put on the upper surface of the lower case 11 and the upper and lower cases 11 and 21 are engaged with each other and fixed, whereby the control board 31 is sandwiched between the upper and lower cases 11 and 21. In this embodiment, the lower case 11 and the upper case 21 are engaged by the engaging claw 23 and the engaging groove 13, and the engaging claw 23 is an engaging piece that hangs from the periphery of the upper case 21. 24 is formed at the tip portion. The engagement grooves 13 are formed on the four side surfaces of the lower case 11 so as to correspond to the engagement claws 23. Then, by engaging the engaging claw 23 with the engaging groove 13, the lower case 11 and the upper case 21 are in a fixed state, and the control board 31 is clamped.

 In FIGS. 1 and 2, reference numeral 25 denotes a load connection connector formed on the upper surface of the upper case 21, and a connector from the electrical component is inserted to connect the electrical component and the control board 31.

 The wire harness 5 is composed of a plurality of electric wires 41, 42, 43. In this embodiment, three wires of a first electric wire 41, a second electric wire 42, and a third electric wire 43 are provided. Among the plurality of electric wires 41, 42, 43, one of the electric wires is, for example, a power line, the other electric wires are communication wires, and the remaining electric wires are ground wires. The connection electrode portions 33, 34, and 35 in the control board 31 are respectively connected to the electric wires 41, 42, and 43, the first connection electrode portion 33 is connected to the first electric wire 41, and the second connection electrode portion 34. Is connected to the second electric wire 42, and the third connection electrode portion 35 is connected to the third electric wire 43.

 The electric wires 41, 42, and 43 use covered electric wires, and are formed by core wire portions 41a, 42a, and 43a, and covering portions 41b, 42b, and 43b that cover the core wire portions 41a, 42a, and 43a. The electric wires 41, 42, 43 are connected to the control board 31. When connecting to the control board 31, the covering portions 41 b, 42 b, 43 b are peeled off from the respective electric wires 41, 42, 43 to form a core portion 41a, 42a, 43a is exposed, and the exposed core wire portions 41a, 42a, 43a are brought into contact with the corresponding connection electrode portions 33, 34, 35.

   When connecting to the control board 31, the electric wires 41, 42, 43 cross over the control board 31 on the lower case 11, and the exposed core parts 41a, 42a, 43a are connection electrode parts 33, 34, 35, respectively. It is performed in the state which faced. For this reason, the electric wires 41, 42 and 43 are routed so as to cross the lower case 11. In this embodiment, positioning grooves 15 (15a, 15b, 15c) are formed on the two side surfaces of the lower case 11 that the electric wires 41, 42, 43 cross. A plurality (three places) of the positioning grooves 15 (15a, 15b, 15c) are formed so as to be recessed side by side from the upper edge of the two side surfaces of the lower case 11, and the corresponding wires 41, 42, 43 are dropped. Is included. In this embodiment, the first electric wire 41 is dropped into the positioning groove 15a, the second electric wire 42 is dropped into the positioning groove 15b, and the third electric wire 43 is dropped into the positioning groove 15c. As the electric wires 41, 42, 43 are dropped in this way, the electric wires 41, 42, 43 are positioned so as to face the corresponding connection electrode portions 33, 34, 35. By this positioning, the positional deviation between the electric wires 41, 42, 43 and the connection electrode portions 33, 34, 35 is eliminated.

   The positioning groove 15 may be formed in a recessed shape on the lower surface of the upper case 21 or may be formed on both the lower case 11 and the upper case 21.

   Next, assembly of the connection structure 1 of this embodiment will be described. For the electric wires 41, 42, and 43, the entire circumferences of the core wire portions 41a, 42a, and 43a are exposed by peeling portions of the covering portions 41b, 42b, and 43b in the length direction. The covering portions 41b, 42b, and 43b are peeled over the entire circumference of the covering portions 41b, 42b, and 43b, whereby the core wire portions 41b, 42b, and 43b are exposed on the entire circumference. On the other hand, in the control device 2, the control board 31 is accommodated in the lower case 11.

Thereafter, the electric wires 41, 42, 43 are placed in the corresponding positioning grooves 15 (15 a, 15 b, 15 c) of the lower case 11 so that the exposed core portions face the corresponding connection electrode portions 33, 34, 35 on the control board 31. Drop into. That is, the first electric wire 41 is dropped into the positioning groove 15a so that the core wire portion 41a faces the first connection electrode portion 33, and the second electric wire 42 is moved into the positioning groove 15b so that the core wire portion 42a faces the second connection electrode portion 34. The third electric wire 43 is dropped into the positioning groove 15c so that the core wire portion 42a faces the third connection electrode portion 35. Thereby, the core wire portions 41a, 42a, 43a of the respective electric wires 41, 42, 43 can be placed in a state where they are positioned on the corresponding connection electrode portions 33, 34, 35.

  Next, the upper case 21 and the lower case 11 are fixed to each other by covering the upper case 21 on the lower case 11 and engaging the engaging claws 23 with the engaging grooves 13 (see FIG. 2). By this fixing, the lower case 11 and the upper case 21 are in a state of sandwiching the electric wires 41, 42, 43, and as shown in FIGS. 4 and 5, the connecting wire portions of the respective core wire portions 41 a, 42 a, 43 a and the control board 31. 33, 34, and 35 are in contact. 4 and 5 show the contact state between the core wire portion 41a of the first electric wire 41 and the connection electrode portion 33, the same applies to the other electric wires 42 and 43 and the connection electrode portions 34 and 35. Thus, when the core wire portions 41a, 42a, and 43a come into contact with the connection electrode portions 33, 34, and 35, the electric wires 41, 42, and 43 can be electrically connected to the control board 31.

  According to such an embodiment, the core wire portions 41a, 42, a43a of the electric wires 41, 42, 43 are placed on the connection electrode portions 33, 34, 35 in the circuit pattern of the control board 31, and in this placement state. Since the electric wires 41, 42, 43 are sandwiched between the lower case 11 and the upper case 21, the electric wires 41, 42, 43 and the control board 31 can be directly connected. For this reason, connection using a connector becomes unnecessary, and connection without a connector is possible. And since a connector can be abbreviate | omitted, a number of parts can be decreased and control apparatus itself can be reduced in size.

   Further, in this embodiment, since the core wire portions 41a, 42a, 43a of the electric wires 41, 42, 43 are exposed, the core wire portions 41a, 42a, 43a are mounted on the connection electrode portions 33, 34, 35 of the control board 31. It is possible to electrically connect to the connection electrode portions 33, 34, and 35 simply by placing them. For this reason, the components for connecting the core wire portions 41a, 42a, 43a to the connection electrode portions 33, 34, 35 are unnecessary, and a connection with a small number of components is possible.

(Second Embodiment)
FIG. 6 shows a cross-sectional view of the second embodiment of the present invention.

  In this embodiment, a rib 51 is provided on the upper case 21, and the rib 51 protrudes from the lower surface of the upper case 21 toward the control board 31. A plurality of ribs 51 are formed on the lower surface of the upper case 21 so as to correspond to the connection electrode portions 33, 34, and 35 in the circuit pattern 32 of the control board 31. That is, in FIG. 6, only the rib 51 corresponding to the first connection electrode portion 33 is shown, but the rib 51 is similarly provided to the corresponding position with the second connection electrode portion 34 and the third connection electrode portion 35. Is formed.

  By providing ribs 51 in the upper case 21 so as to correspond to the connection electrode portions 33, 34, and 35, the upper case 21 and the lower case 11 are fixed to each other, and the electric wires 41, 42, and 43 are connected to the upper and lower cases. When sandwiched between 21 and 11, the rib 51 presses the core wire portions 41 a, 42 a, 43 a of the electric wires 41, 42, 43 against the connection electrode portions 33, 34, 35 of the circuit pattern 32. For this reason, core wire part 41a, 42a, 43a and the connection electrode part 33,34,35 of the circuit pattern 32 can be made to contact reliably, and the electric wire 41,42,43 and the control board 31 can be connected stably. Can do.

  The rib 51 may be formed at a position corresponding to the connection electrode portions 33, 34, and 35 in the lower case 11, and the connection electrode portions 33, 34, and 35 in both cases of the upper case 21 and the lower case 11 You may form in the corresponding position.

(Third embodiment)
FIG. 7 shows a cross-sectional view of the third embodiment of the present invention.

  In this embodiment, the solder 53 is provided on the circuit pattern 32 of the control board 31. The solder 53 is provided so as to correspond to the connection electrode portions 33, 34, and 35 in the circuit pattern 32. In FIG. 7, it is provided so as to correspond to the first connection electrode part 33, but is provided so as to correspond to the second connection electrode part 34 and the third connection electrode part 35.

Thus, by providing the solder 53 corresponding to the connection electrode portions 33, 34, and 35, the solder 53 in each of the connection electrode portions 33, 34, and 35 becomes the core wire portions 41 a and 42 a of the electric wires 41, 42, and 43. , 43a. That is, the connection electrode portions 33, 34, 35 and the corresponding core wires 41 a, 42 a, 43 a of the wires 41, 42, 43 are connected via the solder 53. In such a structure, since the core wire portions 41a, 42, a43a of the electric wires 41, 42, 43 and the connection electrode portions 33, 34, 35 of the circuit pattern 32 are connected via the solder 53, the core wire portion 41a, 42a, 43a and connection electrode part 33, 34, 35 can be made to contact reliably, and electric wire 41, 42, 43 and control board 31 can be connected stably.

(Fourth embodiment)
FIG. 8 is a cross-sectional view of a fourth embodiment of the present invention.

  In this embodiment, a plurality of needle-like protrusions 55 are provided on the circuit pattern 32 of the control board 31. The needle-like protrusions 55 are provided so as to correspond to the connection electrode portions 33, 34, and 35 in the circuit pattern 32. In FIG. 8, the needle-like protrusions 55 are provided so as to correspond to the first connection electrode portion 33. It is provided so as to correspond to the second connection electrode portion 34 and the third connection electrode portion 35. The needle-like protrusion 55 can be formed by implanting a plurality of thin needle-like bodies in the respective connection electrode portions 33, 34, and 35, whereby the needle-like protrusion 55 is formed from the connection electrode portions 33, 34, and 35. It is in a state of rising toward the upper case 21.

Thus, by providing the needle-like protrusion 55 with respect to the connection electrode parts 33, 34, 35, the needle-like protrusion 55 is stuck in the core wire parts 41a, 42a, 43a of the electric wires 41, 42, 43, and the needle-like protrusion The core wire portions 41a, 42a, and 43a and the connection electrode portions 33, 34, and 35 are in contact with each other in a state where the pin 55 is stuck. In such a connection structure, in addition to electrical connection by contact between the core wire portions 41a, 42a, and 43a and the connection electrode portions 33, 34, and 35, the needle-like protrusions 55 stuck in the core wire portions 41a, 42a, and 43a are provided. The core wire portions 41a, 42a, 43a and the connection electrode portions 33, 34, 35 are electrically connected to each other. Further, the core wire portions 41 a, 42 a, 43 a are prevented from being displaced from the connection electrode portions 33, 34, 35 by the needle-like protrusion 55 being inserted. Thus, the core wire portions 41a, 42a, 43a and the connection electrode portions 33, 34, 35 can be reliably electrically connected, and the electric wires 41, 42, 43 and the control board 31 can be stably connected. it can.

In particular, in this embodiment, since the needle-like protrusion 55 is pierced, the electric wires 41, 42, and 43 in which the core wire portions 41a, 42a, and 43a are not exposed from the covering portions 41b, 42b, and 43b can be used. That is, by holding the electric wire between the upper case 21 and the lower case 11, the needle-like protrusion 55 passes through the covering portions 41b, 42b, 43b and reaches the core wire portions 41a, 42a, 43a to reach the core wire portions 41a, 42a, 43a can be stabbed into contact with each other, whereby the core portions 41a, 42a, 43a of the electric wire and the connection electrode portions 33, 34, 35 of the control board 31 can be connected.

  In addition, since a fine convex part produces friction with core wire part 41a, 42a, 43a, position shift of core wire part 41a, 42a, 43a can be prevented, Thereby, electric wire 41, 42, 43 and connection electrode part Contact with 33, 34, and 35 can be ensured, and a stable connection can be made.

   The present invention can be variously modified without being limited to the above embodiments. For example, one, two, four or more electric wires can be used, and it is possible to cope with this by increasing or decreasing the number of connection electrode portions of the circuit pattern according to the number of electric wires. Moreover, as an electric wire, you may use what peeled partially and peeled core wire part 41a, 42a, 43a partially in the circumferential direction, without peeling covering part 41b, 42b, 43b over the perimeter. .

DESCRIPTION OF SYMBOLS 1 Connection structure 2 Control apparatus 5, wire harness 11 Lower case 15, 15a, 15b, 15c Positioning groove 21 Upper case 31 Control board 33, 34, 35 Connection electrode part 41, 42, 43 Electric wire 51 Rib 53 Solder

Claims (5)

A connection structure between a control unit and a wire harness that connects the control board of a control device in which a control board for controlling electrical components mounted on a vehicle is accommodated between upper and lower cases and a wire harness composed of a plurality of electric wires. There,
The wire harness composed of a plurality of wires is connected to the control board by sandwiching the core wire portion of the wire harness of the wire harness between the upper and lower cases in a state of being placed on the circuit pattern of the control board. Connection structure between wire harness and control device. A connection structure between the wire harness and the control device according to claim 1,
The wire is formed of a core wire portion and a covering portion covering the core wire portion, and the core wire portion from which the covering portion is peeled is placed on the circuit pattern, and a wire harness and a control device Connection structure with. A connection structure between the wire harness according to claim 1 or 2 and a control device,
A connection structure between a wire harness and a control device, wherein either one of the upper and lower cases is formed with a rib that presses the core portion of the electric wire onto the circuit pattern of the control board. It is a connection structure of the wire harness and control device according to any one of claims 1 to 3,
Solder is arrange | positioned between either one of the said upper and lower cases, and the said core wire part, The connection structure of the wire harness and control apparatus characterized by the above-mentioned. A connection structure between the wire harness according to any one of claims 1 to 4 and a control device,
Either one of the upper and lower cases is provided with a positioning groove for positioning the electric wire on the circuit pattern of the control board, and the connection structure between the wire harness and the control device.

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