JP2009302039A - Wire harness waterproof structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the entry of water through the element wires of electric wires constituting a wire harness into an electronic control unit when connecting the electronic control unit to equipment via the wire harness. <P>SOLUTION: The wire harness is divided in the wiring direction, and terminals are connected to both terminal ends of the electric wires of the divided wire harness and mounted on first and second connectors, respectively. A relay connector is provided which has first and second connector fitted portions to be fitted to the first and second connectors, respectively, via partition wall portions. Relay terminals are passed through the partition wall portions of the relay connector so that electric contact portions at both ends of the relay terminals are protruded from the first and second fitted portions. Waterproofing agent is filled in a portion contacting one or both of the partition wall portions of the first and second connector fitted portions so that a portion excluding electric contact portions of the relay terminals is embedded in the waterproofing agent. Otherwise, the waterproofing agent is filled in cavities provided in the partition wall portions so that the relay terminals are embedded in the waterproofing agent. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a water-stop structure for a wire harness, and more specifically, when an electronic control unit and a device are connected via a wire harness, water passes through the wires of the wire constituting the wire harness and enters the electronic control unit. It prevents intrusion.

Various electronic control units are mounted on automobiles and motorcycles as performance increases. The electronic control unit controls various devices such as an injector and an ignition coil device based on detection signals from various sensors such as an O ₂ sensor, a speed sensor, and a knock sensor. It is connected with each apparatus, such as an apparatus and an electrical component, by a wire harness.
Further, depending on the length of the wire harness, its routing route, etc., as shown in FIG. 9, the wire harness W / H is connected to the electronic control unit 3 and the unit side wire harness W / H-1 is connected to the device 4. The device side wire harness W / H-2 is divided into the connector 1 attached to the terminal of the unit side wire harness W / H-1 and the connector 2 attached to the device side wire harness W / H-2. In many cases, the electronic control unit 3 and the device 4 are electrically connected by fitting.
Since the wire harness W / H provided between the electronic control unit 3 and the device 4 is often routed through a wet area that is likely to be exposed to rainwater or the like, water enters the electronic control unit 3. It is important not to do so.

  On the other hand, the present applicant has proposed a waterproof connector 5 as disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-146181 (Patent Document 1) as a connector attached to a terminal of a wire harness. As shown in FIG. 10, the waterproof connector 5 has a waterproof rubber plug 6 attached to the back surface of the housing in close contact with the waterproof connector 5, for example, the divided wire harness W / H−1. By using the connectors 1 and 2 of the W / H-2 terminal, it is possible to prevent water from entering from the outside to the inside of the connectors 1 and 2.

  However, when the wire harness W / H is divided as shown in FIG. 9, for example, the insulation covering portion of the equipment side wire harness W / H-2 is damaged, and a part of the covering portion is peeled off. Or when the crack reaches the wire portion of the electric wire, rainwater or the like may enter the wire portion of the electric wire from the damaged portion. In such a case, the water infiltrated into the strand part penetrates between the strands due to the capillary phenomenon, and the wires of the unit side wire harness W / H-1 are passed through the connectors 2 and 1 terminals to be fitted. Water may enter between the strands, and eventually the water may reach the electronic control unit 3 to which the unit-side wire harness W / H-1 is connected.

JP 2004-146181 A

  The present invention has been made in view of the above problems, and when the wire harness connecting the electronic control unit and the device is divided in the wiring direction, and the terminals of the divided wire harnesses are connected to each other, The water that has entered the wire element portion of the wire harness and penetrated between the wire wires is prevented from entering between the wire wires of the other divided wire harness. It is an issue to prevent intrusion.

In order to solve the above-mentioned problem, a first invention is a waterproof structure for a wire harness that connects an electronic control unit mounted on an automobile or a two-wheeled vehicle to a device, the wire harness being divided in a wiring direction, While connecting terminals to both ends of the electric wires of the divided wire harness and attaching these terminals to the first and second connectors respectively,
Provide a relay connector provided with a first and second connector fitting portion through the partition wall portion to be fitted to the first and second connectors,
The relay terminal penetrates the partition wall portion of the relay connector, the electrical contact portions at both ends of each relay terminal project into the first and second connector fitting portions, and the first and second connector fitting portions A portion that is in contact with either or both of the partition wall portions is filled with a water-stopping agent, or a space provided in the partition wall is filled with a water-stopping agent, and a portion excluding the electrical contact portion of the relay terminal It consists of the water-stop structure of the wire harness characterized by being embedded in the water-stop agent.

  As described above, in the first invention, the wire harness connecting the electronic control unit and the device is divided, and the first connector and the second connector attached to the terminal of the divided wire harness are connected via the relay connector. is doing. Further, the relay connector has a partition wall portion that partitions the first and second connector fitting portions that fit the first and second connectors and penetrates the relay terminals, and the first, A portion of the second connector fitting portion that is in contact with one or both partition wall portions is filled with a water-stopping agent, and the portion other than the electrical contact portion of the relay terminal is embedded in the water-stopping agent. .

Further, as a second invention, a water-stop structure of a wire harness that connects an electronic control unit and equipment mounted on an automobile or a motorcycle,
While dividing the wire harness in the wiring direction, respectively connecting terminals to both ends of the wires of the divided wire harness, and attaching these terminals to the first and second connectors, respectively,
Provide a relay connector provided with a first and second connector fitting portion through the partition wall portion to be fitted to the first and second connectors,
The relay terminal penetrates the partition wall portion of the relay connector, the electrical contact portions at both ends of each relay terminal protrude to the first and second connector fitting portions, and the relay terminal in the portion that penetrates the partition wall in advance. A water-stop structure for a wire harness is provided, wherein a water-stop agent is applied and embedded in the partition wall.

  According to the configuration of the first invention and the second invention, the water that has entered the wire portion of one of the divided wire harnesses (for example, the wire harness provided with the second connector at the terminal) is caused by capillary action. Even if water penetrates between the strands and enters the second connector fitting part of the relay connector through the terminal of the electric wire terminal, the water stop filling the part in contact with the partition wall part or the gap in the partition wall part The water stop agent applied to the agent or the relay terminal makes it impossible for water to enter the first connector fitting portion. That is, since the relay terminal is embedded in the water-stopping agent, or the water-stopping agent is applied to the relay terminal, water cannot enter the first connector fitting portion through the relay terminal, so that the first It becomes impossible for the water to enter between the wires of the other wire harness provided with one connector at the terminal.

  That is, according to the configuration, even if water enters the wire element portion of one of the wire harnesses connected to the device side and penetrates between the wires, the water flow is blocked by the relay connector. It is possible to effectively prevent the water from entering the other wire harness connected via the relay connector and further the electronic control unit connected to the wire harness.

  In addition, as described above, the portion excluding the electrical contact portion of the relay terminal is embedded in the water-stopping agent, or the water-stopping agent is applied, and the electric contact portion is in a protruded state. The electrical connection between the terminals can be reliably maintained while enhancing the water stop effect.

The relay terminal to be attached to the relay connector has an elongated flat plate shape having an electrical contact portion composed of a male terminal portion at both ends, and a female terminal portion is connected to the divided electric wire terminals on the first and second sides. Inserted and locked to the connector, or
The relay terminal is provided with a male terminal portion at one end, a female terminal portion at the other end, and the female terminal portion fitted to the male terminal portion at the wire terminal inserted and locked to the first and second connectors, It is preferable to provide a male terminal portion that fits into the female terminal portion.

In particular, in terms of enhancing the water-stop effect between the strands, both ends of the relay terminal are male terminal portions, and the first and second connector fitting portions are in contact with the partition wall portions protruding from the male terminal portions. Is preferably filled with the water-stopping agent.
However, the terminal shape of the relay terminal is not limited to the above-described shape, and for example, a female terminal portion may be provided at both ends.

Furthermore, as a third invention, there is provided a waterproof structure for a wire harness for connecting an electronic control unit mounted on an automobile or a two-wheeled vehicle to a device, wherein the wire harness is provided with a split portion for connecting a waterproof connector, and the split The first and second connectors for inserting and locking these terminals, respectively, are provided by crimping and connecting terminals having electrical contact portions that are fitted to both ends of the electric wires of the wire harness, respectively,
A wire harness characterized in that either or both of the first and second connectors are filled with a water-stopping agent, and an electric wire crimping portion excluding an electric contact portion of a terminal is embedded in the water-stopping agent. Provides a water stop structure.

  As described above, in the third invention, the first connector and the second connector provided at the end of each divided wire harness are directly fitted without interposing the relay terminals as in the first and second inventions. It is combined. Further, either one or both of the first and second connectors is filled with a water-stopping agent, and the wire crimping portion excluding the electrical contact portion of the terminal is embedded in the water-stopping agent.

  According to the above configuration, for example, when the terminal is provided with the second connector, even if water enters the wire element portion of one of the divided wire harnesses, and water has permeated between the strands by capillary action, The water-stopping agent filled in the second connector of the terminal also prevents the water from reaching the electrical contact portion in the second connector. In addition, when the first connector is filled with the water-stopping agent instead of the second connector, the water can reach the electrical contact portion of the terminal of the first connector to be fitted, but the first connector The filled water-stopping agent cannot enter between the wire elements of the other wire harness to which the terminal is crimped. That is, since the wire crimping portion of the terminal is embedded in the water-stopping agent filled in one or both of the first and second connectors, it is impossible for the water to travel along the wire crimping portion. It is impossible for water that has permeated between the wire strands of the one wire harness to enter between the wire strands of the other wire harness divided through the wire crimping portion.

That is, according to the above configuration, even if water enters the wire element portion of one of the wire harnesses connected to the device side and penetrates between the wires, the flow of water remains at the second connector of the terminal or / and Because it is blocked by the mating first connector, it effectively prevents the water from entering between the wire strands of the other wire harness connected to the end of the wire connector and the electronic control unit connected to the wire harness. can do.
Moreover, according to the said structure, not only the water which osmose | permeated between the electric wire strands of a wire harness but the invasion of the water from the outer side of a connector can be prevented.

  Also in the third invention, since the electric wire crimping portion excluding the electrical contact portion of the terminal is embedded in the water-stopping agent and the electric contact portion is in a protruding state, the water-stopping effect by the water-stopping agent is enhanced. However, the electrical connection between the terminals can be reliably maintained.

  It is preferable that the water-stopper is made of a gel-like sealant or a liquid potting sealant, and is filled and cured in a terminal mounting region in the housing of the relay connector, the first connector, or the second connector.

As described above, as a water-stopping agent, a gel-like sealant or a liquid potting sealant is filled in the terminal mounting region in the housing of the relay connector or the first and second connectors and cured, thereby providing water resistance. The gel-like sealant or liquid potting sealant that is excellent in heat resistance, heat resistance, insulation, etc. can closely adhere to the embedded relay terminal or wire crimping part without giving a large load, thereby enhancing the water stop effect. it can.
As the gel sealant, for example, silicone gel or butyl rubber is preferably used. Further, as the liquid potting sealant, for example, an epoxy resin agent or the like is preferably used.

The electronic control unit is at least one selected from an engine control unit, a fuel injection control unit, an ABS control unit, an air bag control unit, a travel safety control unit, and a vehicle radar control unit,
The device connected to the electronic control unit is:
One or more controlled devices selected from lights, washers, door locks, anti-theft horns and starters controlled by an electronic control unit,
An information transmission device comprising an O ₂ sensor, a speed sensor, a knock sensor, etc. for transmitting information to the electronic control unit and / or another electronic control unit;
Furthermore, it is preferably one or more types of electrical components selected from fuses, relays, connectors, and ground members of the electrical junction box.

  In many cases, the above-described devices are arranged in a flooded region such as an engine room, and the wire harness connected to these devices often passes through the flooded region. Therefore, by dividing the wire harness connecting the electronic control unit and the device and applying the water stop structure of the present invention, it has penetrated between the wire strands of one wire harness connected to the device side. This is effective in that water can be reliably blocked in the vicinity of the divided portion of the wire harness and prevented from entering the electronic control unit.

As described above, according to the first and second inventions, the wire harness that connects the electronic control unit and the device is divided, and the first connector and the second connector that are attached to the terminals of the divided wire harnesses. The relay connector is connected via a relay connector, and the relay connector has a partition wall portion that partitions the first and second connector fitting portions for fitting the first and second connectors and penetrates the relay terminals. ing.
In the first invention, the first invention and the second connector fitting portion are configured to fill a water-stopper into a portion in contact with either one or both of the partition wall portions or a gap in the partition wall portion. Then, a water-stopping agent is applied to the surface of the relay terminal that penetrates the partition wall.
With this configuration, water that has penetrated into the wire portion of one of the wire harnesses that is divided and connected to the device penetrates between the strands, passes through the terminals in the second connector of the terminal, and the second of the relay connector. Even if water penetrates to the connector fitting part, the water is transferred to the relay terminal by the water stopping agent filled in the part contacting the partition wall part or the water stopping agent applied to the relay terminal. It becomes impossible to enter. Therefore, it is possible to prevent the water from entering the other wire harness to which the first connector is attached, and the electronic control unit connected to the wire harness.

  In addition, as described above, the portion other than the electrical contact portion of the relay terminal is embedded in the water-stopping agent, and the electrical contact portion is in a protruded state, so that the terminal is improved while enhancing the water-stopping effect by the water-stopping agent. The electrical connection between them can be reliably maintained.

  Furthermore, as described above, in the third invention, the first connector and the second connector provided at the end of each divided wire harness without the relay terminal as in the first and second inventions. As a configuration in which the wire crimping portion excluding the electrical contact portion of the terminal is embedded in the water-stopping agent while being directly fitted and filled with one or both of the first and second connectors. Yes. With this configuration, even when water enters the wire element portion of one of the wire harnesses that is divided and connected to the device side and penetrates between the wires, the flow of water is not connected to the second connector or / and the fitting of the terminal. Since it is blocked by the water-stopping agent of the first connector to be combined, water cannot enter the wire element portion of the other wire harness through the wire crimping portion. Accordingly, it is possible to effectively prevent the water from entering the electronic control unit connected to the other wire harness. Further, not only water that has permeated between the wire elements of the wire harness but also water from the outside of the connector can be prevented.

  Furthermore, in the third aspect of the invention, since the electric wire crimping portion excluding the electrical contact portion of the terminal is embedded in the water-stopping agent and the electric contact portion is in a protruding state, the water-stopping effect by the water-stopping agent is enhanced. However, the electrical connection between the terminals can be reliably maintained.

  Further, as described above, as a water-stopping agent, a gel-like sealant or a liquid potting sealant is filled in the terminal mounting region in the housing of the relay connector or the first and second connectors and cured. In addition, the gel sealant or liquid potting sealant with excellent water resistance, heat resistance, insulation, etc. are in close contact with each other without imposing a large load on the embedded relay terminal or wire crimping part, thereby improving the water stop effect. be able to.

In 1st Embodiment, it is a conceptual diagram which shows the connection state of the wire harness which connects an electronic control unit and an apparatus. It is a schematic perspective view of the 1st connector fitted to a relay connector, and a 2nd connector. It is a schematic sectional drawing of the 1st connector fitted to a relay connector, and a 2nd connector. It is principal part sectional drawing of the modification of 1st embodiment. It is principal part sectional drawing of 2nd embodiment. It is a conceptual diagram which shows 3rd embodiment and shows the connection state of the wire harness which connects an electronic control unit and an apparatus. It is a schematic perspective view of the 1st connector and 2nd connector which are fitted. It is a schematic sectional drawing of the 1st connector and 2nd connector which are fitted. It is drawing which shows a prior art example. It is drawing which shows a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 to 3 show the first embodiment, and illustrate the water stop structure of the wire harness W / H that connects the electronic control unit 10 and the device 11.
An electronic control unit 10 mounted on an automobile or a motorcycle controls the controlled device 13 based on a signal received from an information transmission device 12 such as a sensor. As shown in FIG. The information transmission device 12, the controlled device 13, and the device 11 including the electrical component 14 such as a fuse box connected to a power source are connected by a wire harness W / H. In addition, the wire harness W / H has passed through the wet area of the vehicle.

Examples of the electronic control unit 10 include an engine control unit, a fuel injection control unit, an airbag control unit, and a travel safety control unit.
Further, as described above, the device 11 includes the information transmission device 12, the controlled device 13, and the electrical component 14, and the information transmission device 12 varies depending on the type of the electronic control unit 10, for example, an O ₂ sensor. And speed sensors, knock sensors and other electronic control units.
Further, the controlled device 13 includes, for example, a light, a washer, a door lock, a burglarproof horn, etc., depending on the type of the electronic control unit 10.
Furthermore, the electrical component 14 includes, for example, a fuse, a relay, a connector, and a ground member of an electrical connection box.

As shown in FIG. 1, the wire harness W / H that connects the electronic control unit 10 and the device 11 is connected to the unit-side wire harness W / H-1 that is connected to the electronic control unit 10 and the device 11. The device side wire harness W / H-2 is divided. In addition, among the wire harnesses W / H, the unit-side wire harness W / H-1 is routed in a place where the electric wire is not damaged and water does not enter the wire portion.
As shown in FIGS. 2 and 3, female terminal portions 21a and 22a are respectively connected to the electric wire terminals of the divided unit-side wire harness W / H-1 and device-side wire harness W / H-2, and the first connector. 21 is inserted and locked to the second connector 22. Further, the first connector 21 of the unit side wire harness W / H-1 terminal and the second connector 22 of the equipment side wire harness W / H-2 terminal are connected via a relay connector 23.

  The relay connector 23 is provided with a first connector fitting portion 23a for fitting the first connector 21 and a second connector fitting portion 23b for fitting the second connector 22, and the first connector fitting portion 23a The second connector fitting portion 23b is partitioned by the partition wall portion 23c. A plurality of relay terminals 23d are passed through the partition wall 23c, and each relay terminal 23d has an elongated flat plate shape with the electrical contact portions at both ends as male terminal portions 23d-1 and 23d-2. That is, the male terminal portion 23d-1 on one end side of the relay terminal 23d that protrudes to the first connector fitting portion 23a is connected to the female terminal portion 21a of the first connector 21, and protrudes to the second connector fitting portion 23b. The male terminal portion 23d-2 on the other end side of the relay terminal 23d to be connected is connected to the female terminal portion 22a of the second connector 22.

Moreover, the gel-like sealing agent which consists of silicone gel is filled into the terminal attachment area | region which contact | connects the partition wall part 23c of the 2nd connector fitting part 23b as the water stop agent 23e. The relay terminal 23d protruding to the second connector fitting portion 23b is in a state where a portion excluding the male terminal portion 23d-2 is embedded in the water-stopping agent 23e.
In this embodiment, the portion of the second connector fitting portion 23b that contacts the partition wall portion 23c is filled with the water-stopping agent 23e, but may be filled on the first connector fitting portion 23a side. The first and second connector fitting portions 23a and 23b may be filled.

  The water-stopping agent 23e filled in the terminal attachment region of the second connector fitting portion 23b in contact with the partition wall portion 23c is formed by injecting liquid silicone oil into the region and curing it.

  The first connector 21 of the unit side wire harness W / H-1 terminal is fitted to the first connector fitting portion 23a of the relay connector 23, and the device side wire harness W is fitted to the second connector fitting portion 23b of the relay connector 23. By fitting the second connector 22 of the / H-2 terminal, the electronic control unit 10 and the device 11 can be electrically connected (FIG. 3).

  As described above, in this embodiment, the wire harness W / H that connects the electronic control unit 10 and the device 11 is divided, and the first connector 21 at the terminal of the divided unit-side wire harness W / H-1 The terminal side connector 22 of the device side wire harness W / H-2 is connected via the relay connector 23. Further, the relay connector 23 has a partition wall portion 23c that partitions the first and second connector fitting portions 23a and 23b for fitting the first and second connectors 21 and 22 and penetrates the relay terminal 23d. In addition, the portion of the second connector fitting portion 23b that is in contact with the partition wall portion 23c is filled with the water-stopping agent 23e.

  By the said structure, the water which infiltrated into the strand part from the damaged part A where a part of the insulation coating part of the electric wire w which comprises the apparatus side wire harness W / H-2 was stripped penetrates between strands. Even if water enters the second connector fitting portion 23b of the relay connector 23 through the female terminal portion 22a of the electric wire terminal, the water stop filled in the portion in contact with the partition wall portion 23c of the second connector fitting portion 23b. The agent 23e makes it impossible for the water to enter the first connector fitting portion 23a. Therefore, it is possible to prevent the water from entering the unit-side wire harness W / H-1 to which the first connector 21 is attached and the electronic control unit 10 connected to the wire harness W / H-1. it can.

  Moreover, since the part except the male terminal part 23d-2 of the relay terminal 23d is embed | buried with the water-stopping agent 23e as mentioned above, and the male terminal part 23d-2 is made into the state protruded, it is stopped by the water-stopping agent 23e. The electrical connection between the terminals can be reliably maintained while enhancing the water effect.

  Furthermore, as described above, the water-stopping agent 23e is filled with a gel-like sealant in the terminal mounting region in contact with the partition wall 23c and is cured, so that the water-stopping excellent in water resistance, heat resistance, insulation, etc. The agent 23e can be brought into close contact with the buried relay terminal 23d without giving a large load, thereby enhancing the water stop effect.

FIG. 4 shows a modification of the first embodiment.
In this modification, the partition wall portion 23c of the relay connector 23 is divided into two partition wall portions 23c-1 and 23c-2, and a gap 23c- is formed between the partition wall portions 23c-1 and 23c-2. 3 is provided, and the gap 23c-3 is filled with a water stop agent 23e.
The relay terminal 23d is passed through the partition wall 23c-1, the gap 23c-3 and the partition wall 23c-2, and the central portion of the penetrated relay terminal 23d is passed through the water seal 23e. And embedded in the water stop agent 23e. Since other configurations are the same as those of the first embodiment, illustration and description thereof are omitted.

  When the water-stopping agent 23e is filled between the partition wall portions 23c-1 and 23c-2 divided into two as described above, the water-stopping agent 23e can be prevented from flowing out, and the relay terminal 23d penetrating the partition wall portion is provided. It can be surely passed through the water stop agent 23e.

FIG. 5 shows a second embodiment.
In the second embodiment, instead of filling the portion in contact with the partition wall portion of the relay connector 23 or the gap in the partition wall portion with a water-stopping agent, the surface of the relay terminal 23d penetrating the partition wall portion 23c is previously formed The water stop agent 23e is applied, and in this state, the relay terminal 23d is insert-molded into a portion that becomes the partition wall portion 23c, thereby forming the relay connector 23.
Since other configurations are the same as those of the first embodiment, illustration and description thereof are omitted.

  Thus, if the water-stopping agent 23e is made to adhere to the surface of the relay terminal 23d, the process of filling the water-stopping agent 23e into the part which contacts the partition wall part or the space | gap provided in the partition wall part can be made unnecessary. And the water stop agent 23e of the surface of the relay terminal 23d insert-molded in the partition wall part 23c can be hold | maintained reliably, and a water stop performance can be improved.

A third embodiment is shown in FIGS.
In the third embodiment, the first connector 31 and the device-side wire harness W provided at the terminal of the divided unit-side wire harness W / H-1 without interposing a relay terminal as in the first and second embodiments. The second connector 32 provided at the terminal of / H-2 is directly fitted. In the third embodiment, the male terminal portion 31a is connected to the wire terminal of the unit-side wire harness W / H-1 and attached to the first connector 31, while the wire terminal of the device-side wire harness W / H-2. The female terminal portion 32a is connected to the second connector 32 and the first connector 31 from which the male terminal portion 31a is projected is filled with a liquid potting sealant made of an epoxy resin agent as a water stop agent 31b. The wire crimping portion excluding the electrical contact portion of the male terminal portion 31a is embedded in the water stop agent 31b. Except for the points described above, the second embodiment is the same as the first embodiment.

  According to the said structure, when water penetrate | invades into an electric wire strand part from the damaged part A of the apparatus side wire harness W / H-2, and has penetrate | infiltrated between strands by the capillary phenomenon, it connects with the female terminal part 32a of a terminal. Although the water can reach the electrical contact portion of the male terminal portion 31a of the first connector 31, the wire crimping portion of the male terminal portion 31a is embedded in the water stop agent 31b filled in the first connector 31. Therefore, the water into the electronic control unit 10 connected between the wire wires of the unit-side wire harness W / H-1 to which the male terminal portion 31a is crimped and connected to the wire harness W / H-1 is further provided. Intrusion can be prevented.

  Further, as described above, the liquid potting sealant is filled in the terminal mounting region of the first connector 31 as the water stop agent 31b and is cured, so that the water stop agent is excellent in water resistance, heat resistance, insulation, and the like. 31b can contact | adhere, without giving a big load to the embedded electric wire crimping part, and can improve a water stop effect.

DESCRIPTION OF SYMBOLS 10 Electronic control unit 11 Apparatus 12 Information transmission apparatus 13 Controlled apparatus 14 Electrical components 21, 31 First connector 21a Female terminal part 31a Male terminal part 31b Water stop agent 22, 32 Second connector 22a, 32a Female terminal part 23 Relay connector 23a 1st connector fitting part 23b 2nd connector fitting part 23c Partition wall part 23d Relay terminal 23d-1, 23d-2 Male terminal part 23e Water stop agent W / H-1 Unit side wire harness W / H-2 apparatus Side wire harness

Claims (6)

A waterproof structure for a wire harness that connects an electronic control unit mounted on an automobile or a two-wheeled vehicle to a device, wherein the wire harness is divided in a wiring direction, and terminals are respectively connected to both ends of the wires of the divided wire harness. While connecting and attaching these terminals to the first and second connectors respectively,
Provide a relay connector provided with a first and second connector fitting portion through the partition wall portion to be fitted to the first and second connectors,
The relay terminal penetrates the partition wall portion of the relay connector, the electrical contact portions at both ends of each relay terminal project into the first and second connector fitting portions, and the first and second connector fitting portions A portion that is in contact with either or both of the partition wall portions is filled with a water-stopping agent, or a space provided in the partition wall is filled with a water-stopping agent, and a portion excluding the electrical contact portion of the relay terminal A water-stop structure for a wire harness, which is embedded in the water-stop agent. A wire harness water stop structure for connecting an electronic control unit and equipment mounted on an automobile or a motorcycle,
While dividing the wire harness in the wiring direction, respectively connecting terminals to both ends of the wires of the divided wire harness, and attaching these terminals to the first and second connectors, respectively,
Provide a relay connector provided with a first and second connector fitting portion through the partition wall portion to be fitted to the first and second connectors,
The relay terminal penetrates the partition wall portion of the relay connector, the electrical contact portions at both ends of each relay terminal project to the first and second connector fitting portions, and the relay terminal in the portion penetrating the partition wall in advance. A waterproof structure for a wire harness, wherein a waterproofing agent is applied and embedded in the partition wall. The relay terminal to be attached to the relay connector has an elongated flat plate shape with electrical contact portions made up of male terminal portions at both ends, and a female terminal portion is connected to the divided electric wire terminals on the first and second sides. Inserted and locked to the connector, or
The relay terminal is provided with a male terminal portion at one end, a female terminal portion at the other end, and the female terminal portion fitted to the male terminal portion at the wire terminal inserted and locked to the first and second connectors, The water-stop structure for a wire harness according to claim 1 or 2, wherein a male terminal portion that fits with the female terminal portion is provided. A waterproof structure for a wire harness that connects an electronic control unit mounted on an automobile or a two-wheeled vehicle to a device, wherein a split portion is provided for interposing a waterproof connector in the wire harness, and both wires of the split wire harness are provided. A terminal having an electrical contact portion that is fitted to each of the terminals is crimped and connected, and a first and second connector for inserting and locking these terminals are provided,
A wire harness characterized in that either or both of the first and second connectors are filled with a water-stopping agent, and an electric wire crimping portion excluding an electric contact portion of a terminal is embedded in the water-stopping agent. Water stop structure.   The said water stop agent consists of a gel-like sealant or a liquid potting sealant, and fills and cures the terminal mounting region in the housing of the relay connector, the first connector or the second connector. The water stop structure of the wire harness according to claim 4. The electronic control unit is at least one selected from an engine control unit, a fuel injection control unit, an ABS control unit, an air bag control unit, a travel safety control unit, and a vehicle radar control unit,
The device connected to the electronic control unit is:
One or more controlled devices selected from lights, washers, door locks, anti-theft horns and starters controlled by an electronic control unit,
An information transmission device comprising an O ₂ sensor, a speed sensor, a knock sensor, etc. for transmitting information to the electronic control unit and / or another electronic control unit;
The water stop structure for a wire harness according to any one of claims 1 to 5, further comprising at least one electric component selected from a fuse, a relay, a connector, and a grounding member of an electrical junction box.

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