JP4515944B2 - Waterproof structure of electronic control equipment - Google Patents

Description

  The present invention is an electronic device that is arranged together with an electric actuator between an outer panel and an inner panel of a vehicle door, and to which wiring is connected from the inner side of the inner panel through a first through hole formed in the inner panel. The present invention relates to a waterproof structure for control equipment.

  As shown in FIG. 6, in the door panel 2 of the vehicle door, an outer panel 1, an inner panel 3, and a door trim 5 are arranged in this order from the outside. The outer panel 1 and the inner panel 3 are hemmed on three sides excluding the waist line (the opening 9 of the window glass 7), and are further fixed by spot welding or bonding.

  Mechanical parts such as a door lock and a window regulator are attached to the surface of the inner panel 3 facing the outer panel 1. These mechanisms are driven using an electric actuator. The drive control of the electric actuator is performed by an electronic control device (ECU), and this electronic control device is provided near the electric actuator.

  An example of this will be described with reference to FIG. In the figure, the inner panel 3 has a through hole (first through hole) 3a. A motor 11 that drives a window regulator is provided outside the inner panel 3. A control circuit board as an electronic control device is built in the housing 13 of the motor 11. The connector 15 on the control circuit board side is exposed to the outside of the housing 13.

The connector 17 of the wiring 19 connected to the control circuit board is connected to the connector 15 from the inside of the inner panel 3 through the through hole 3a.
A substantially cylindrical boot 21 is disposed between the connector 15 and the outer surface of the inner panel 3. On one end side of the boot 21, a connector fitting portion 21 a that fits on the peripheral surface of the connector 15 is formed. On the other end side of the boot 21, there are an inner panel fitting portion 21b that fits into the through hole 3a of the inner panel 3, and a collar portion 21c that contacts the periphery of the through hole 3a on the outer surface of the inner panel 3. And are formed.

By providing this boot 21, rainwater or the like entering the outside of the inner panel 3 (the space between the inner panel 3 and the outer panel 1 in FIG. 6) through the opening 9 of the window glass 7 through the connector 15. Intrusion into the internal control circuit board is prevented (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 2004-80959 (FIG. 4)

The waterproof structure configured as shown in FIG. 7 is a waterproof structure against water that enters the space between the inner panel 3 and the outer panel 1 through the opening 9 of the window glass 7.
Usually, water does not enter the space between the inner panel 3 and the door trim 5. However, when the vehicle is submerged, water also enters the space between the inner panel 3 and the door trim 5. In such a case, the configuration shown in FIG. 7 has a problem that water enters from the opening on the other end side of the boot 21 and the connector 15 is not waterproofed.

  In particular, when the vehicle is submerged, it is necessary to lower the window glass 7 or release the door lock in order to escape from the vehicle. In the waterproof structure as shown in FIG. Water may cause a short circuit in the control circuit board, and the window regulator, door lock, and the like provided outside the inner panel 3 may not operate.

  The present invention has been made in view of the above problems, and an object thereof is to provide a waterproof structure for an electronic control device that has a waterproof function against water intrusion from the inside of an inner panel.

  According to a first aspect of the present invention for solving the above-described problem, the first through hole formed in the inner panel is disposed between the outer panel and the inner panel of the vehicle door together with the electric actuator, and is formed from the inner side of the inner panel. In the waterproof structure of the electronic control device to which the wiring is connected, in the electronic control device, a second through hole is formed in a portion facing the inner panel, and a control circuit board is provided inside, A portion of the control circuit board facing the second through hole is provided with a pin extending toward the second through hole and connected to the connector of the wiring, and the inner panel and the electronic device A waterproof member comprising a cylindrical boot part and a bag-like connector housing part is provided between the first through hole and the waterproof part. No one A first contact portion that is in close contact with the entire circumference of the hole is formed, and on the other end side of the boot portion, the entire circumference of the second through hole extends around the second through hole of the electronic device. A second close contact portion is formed, and a pin facing portion facing a pin of a control circuit board inside the electronic control device is formed on one end side of the connector housing portion, and the other end of the connector housing portion is formed. Is connected to the entire periphery of the inner surface of the boot portion, and further, a third through hole through which the pin is inserted is formed in the pin facing portion, and the wiring is formed from the inner side of the inner panel, The first through hole of the inner panel is inserted through the boot portion of the prevention member and connected to the pin, and the pin facing portion of the connector housing portion is in close contact with the substrate. Electric A waterproof structure of the control equipment.

  Water that has entered the outside of the inner panel is prevented from entering the electronic control device by the cylindrical boot portion of the waterproof member.

  Water that has entered the inside of the inner panel is prevented from entering the electronic control device when the pin facing portion of the bag-shaped connector housing portion of the waterproof member is in close contact with the substrate.

  The invention according to claim 2 is characterized in that the connector housing portion has elasticity, and the size of the third through hole of the pin facing portion of the connector housing portion is set smaller than the cross section of the pin. The waterproof structure for an electronic control device according to claim 1.

  When the pin is inserted through the third through hole of the connector housing portion, the pin and the third through hole are press-fitted. Therefore, the water that has entered the inside of the inner panel does not pass through the third through hole and is prevented from entering the electronic control device.

  According to a third aspect of the invention, the pin facing portion of the connector housing portion protrudes in the direction of the board along the third through hole and over the entire circumference of the third through hole, and contacts the board. The waterproof structure for an electronic control device according to claim 1, wherein a contactable first protrusion is formed.

  The first protrusion of the pin facing portion of the connector housing portion is in close contact with the substrate. The water that has entered the inside of the inner panel cannot pass through the first protrusion, and is prevented from entering the electronic control device.

  According to a fourth aspect of the present invention, there is provided a second protrusion that protrudes in the direction of the board along the periphery of the pin facing part of the connector housing part, and that can contact the board. The waterproof structure for an electronic control device according to any one of claims 1 to 3, wherein the waterproof structure is formed.

  The 2nd protrusion of the pin opposing part of a connector housing part adheres to a substrate. The water that has entered the inside of the inner panel cannot pass through the second protrusion, and is prevented from entering the electronic control device.

  According to the first to fourth aspects of the invention, the water that has entered the outside of the inner panel can be prevented from entering the electronic control device by the boot portion. Further, the water that has entered the inner panel can be prevented from entering the electronic control device when the pin facing portion of the connector housing portion is in close contact with the substrate.

  According to the invention which concerns on Claim 2, since the magnitude | size of the 3rd through-hole of the pin opposing part of the said connector housing part was set smaller than the cross section of the said pin, the water which penetrate | invaded the inner panel inner side was set. In this case, it is impossible to pass through the third through hole, the entry into the electronic control device is prevented, and the waterproof function is further improved against the intrusion of water from the inside of the inner panel.

  According to the third aspect of the present invention, the first pin projecting toward the board along the third through hole on the pin facing portion of the connector housing portion over the entire circumference of the third through hole. By forming the protrusions, it becomes possible to adhere to the substrate at a higher pressure than the entire area of the pin facing portion is in close contact with the substrate, and further waterproof against the intrusion of water from the inside of the inner panel. Function is improved.

  According to the invention which concerns on Claim 4, by forming the 2nd protrusion part which protrudes in the said board | substrate direction over the perimeter of the said connector housing part along the periphery of the pin opposing part of the said connector housing part, Rather than the entire area of the pin facing portion being in close contact with the substrate, it is possible to make close contact with the substrate at a higher pressure, and the waterproof function is further improved against water intrusion from the inside of the inner panel.

  The window regulator to which the waterproof structure of the electronic control device of this embodiment is applied will be described. Initially, the whole structure of a window regulator is demonstrated using FIG. 4, FIG. 4 is a plan view of the door with the inner panel removed, and FIG. 5 is a cross-sectional view taken along line AA in FIG.

  In these drawings, a motor base 101 is attached to the inner panel 102. A motor 103 as an electric actuator is provided on the surface of the motor base 101 on the inner panel 102 side. The output shaft of the motor 103 protrudes on the surface of the motor base 101 on the outer panel 104 side, and a pinion 105 is attached to the protruding portion.

  A pin 107 extending in the direction of the outer panel 104 is rotatably attached to the motor base 101. A base side of a lift arm 109 is attached to the pin 107, and the lift arm 109 can rotate with respect to the motor base 101. Further, the base side of the driven gear 111 extending to the opposite side of the extending direction of the lift arm 109 is attached to the pin 107, and the driven gear 111 can be rotated with respect to the motor base 101 together with the lift arm 109. It has become. The teeth formed on the rotation end side of the driven gear 111 mesh with the pinion 105, and when the pinion 105 rotates, the integrated driven gear 111 and lift arm 109 rotate around the pin 107. It has become.

  The window glass 113 is provided with a lift arm bracket 115 in which a guide extending in a direction intersecting with the opening / closing direction (arrow direction in FIG. 4) of the window glass 113 is formed. A first shoe 117 movably engaged with the guide of the lift arm bracket 115 is provided on the rotating end side of the lift arm 109.

  At an intermediate portion of the lift arm 109, an equalizer arm 121 is provided in which the intermediate portion is pivotally attached so as to intersect the lift arm 109 in an X shape. At one end of the equalizer arm 121, a second shoe 123 is provided that is movably engaged with the guide of the lift arm bracket 115.

  On the other hand, the inner panel 102 is provided with an equalizer arm bracket 125 having a guide parallel to the guide of the lift arm bracket 115. A third shoe 127 that is movably engaged with the equalizer arm bracket 125 is provided at the other end of the equalizer arm 121.

  When the motor 103 is driven, the pinion 105 provided on the output shaft of the motor 103 rotates, and the driven gear 111 and the lift arm 109 rotate around the pin 107. When the motor 103 is driven and the rotation end side of the lift arm 109 is moved upward or downward, the lift arm bracket 115 is raised and lowered, and the window glass 113 is also raised and lowered. At this time, the equalizer arm 121 rotates so that the window glass 113 moves up and down while keeping the level.

Then, an ECU unit (electronic control device) 201 having a control circuit board for controlling the motor 103 is provided adjacent to the motor 103.
The inner panel 102 is formed with a first through hole 102a, and the ECU unit 201 located outside the inner panel 102 is connected to the wiring 203 from the inner panel 102 via the first through hole 102a. A connector 205 is connected.

  Here, the waterproof structure of the ECU unit 201 and the ECU unit 201 will be described with reference to FIGS. 1A is a cross-sectional view illustrating an ECU unit, and is a cross-sectional view taken along a cutting line BB in FIG. 2, FIG. 1B is an enlarged view of a portion C in FIG. FIG. 1C is an enlarged view of a portion D in FIG. 1A, and FIG. 1D is a diagram for explaining another example of the first protrusion. 2 is an exploded perspective view of the ECU unit, FIG. 3A is a perspective view of the ECU cover viewed from the direction of arrow C in FIG. 2, and FIG. 3B is a view of the connector housing portion of FIG. FIG.

  The ECU unit 201 is roughly divided into a control circuit board 210, a box-like ECU case 211 having one open surface, and an ECU cover 213 that closes the open surface of the ECU case 211 and faces the inner panel 102. It is made up of.

  Assuming that the opened surface of the ECU case 211 is the upper surface, the two opposite surfaces of the ECU case 211 extend from the lower surface toward the upper surface, and are cantilevered with a hook portion 221 formed at the tip. A hook 223 is formed. In FIGS. 1 and 2, the hook 223 can be seen only on one of the two opposing surfaces of the ECU case 211, but the hook 223 is also present on the other surface.

  On the other hand, the ECU cover 213 includes a main body portion 215 that covers the opening of the ECU case 211, and a standing wall portion 217 that is bent from the peripheral portion of the main body portion 215 and faces the side surface of the ECU case 211. A seal member 219 that contacts the upper end surface of the side surface of the ECU case 211 and seals the inside of the ECU case 211 is provided on the surface of the main body 215 of the ECU cover 213 that faces the opening of the ECU case 211. Further, two hook fitting portions 227 in which holes 225 that can be engaged and disengaged with the hook portion 221 of the hook 223 of the ECU case 211 are formed in the standing wall portion 217.

  A second through hole 231 is formed on the inner panel 102 side of the ECU cover 213. A plurality of pins (electrodes) 233 extending toward the second through hole 231 are provided at a portion of the ECU case 211 facing the second through hole 231 of the control circuit board 210.

A waterproof member 250 is provided between the inner panel 102 and the ECU unit 201. The waterproof member 250 is roughly divided into a boot portion 251 and a connector housing portion 261.
Between the inner panel 102 and the ECU cover 213, a cylindrical boot portion 251 having both open end surfaces is disposed. The boot portion 251 is made of an elastic material such as synthetic rubber, and is inserted between the inner panel 102 and the ECU cover 213 while being compressed and deformed in the axial direction of the cylinder.

  Then, one end side of the boot portion 251 is fitted into the first through hole 102a of the inner panel 102, and an elastic repulsion force in the axial direction of the boot portion 251 is provided on the outer peripheral surface on the one end side. As a result, a flange portion (first contact portion) 253 is formed in which the periphery of the first through hole 102a of the inner panel 102 is in close contact with the entire periphery of the first through hole 102a.

  The other end face (second contact portion) 251a of the boot portion 251 is in close contact with the ECU cover 213 so as to surround the second through hole 231 of the ECU cover 213 over the entire circumference of the second through hole 231. is doing.

  A connector housing portion 261 having a bag-like elasticity is disposed inside the ECU case 211. A pin facing portion 263 that faces the pin 233 of the control circuit board 210 is formed on one end side (the bottom side of the bag) of the connector housing portion 261, and the other end side (the opening side of the bag) is The connector housing portion 261 and the boot portion 251 are integrated with each other over the entire circumference of the inner surface of the boot portion 251. Further, a third through hole 265 into which the pin 233 is inserted is formed in the pin facing portion 263.

  Then, the connector 205 of the wiring 203 is inserted into the boot portion 251 from the inner side of the inner panel 102 through the first through hole 102a of the inner panel 102, and the third portion of the pin facing portion 263 of the connector housing portion 261 is inserted. Are connected to pins 233 inserted through the through holes 265.

  In the present embodiment, the size of the third through hole 265 of the pin facing portion 263 of the connector housing portion 261 having elasticity is set smaller than the cross section of the pin 233. Projecting in the direction of the control circuit board 210 over the entire circumference of the third through hole 265 along the third through hole 265 to the pin facing portion 263 of the connector housing portion 261 and closely contacting the side surface of the pin 233 over the entire circumference A first protrusion 271 was formed (see FIG. 1C). Furthermore, the 2nd protrusion part 273 which protrudes in the control circuit board 210 direction was formed over the perimeter of the connector housing part 261 along the periphery of the pin opposing part 263 of the connector housing part 261 (refer FIG.1 (b)). ).

  By fitting the hook fitting portion 227 of the ECU cover 213 to the hook portion 221 of the ECU case 211, the first protrusion 271 and the second protrusion 273 of the pin facing portion 263 of the connector housing portion 261 are controlled. Close contact with the circuit board 210.

  In this embodiment, the following configuration is used so that the connector 205 is not easily detached from the pin 233. The EUC cover 213 is formed with a bent portion 269 that extends into the connector housing portion 261 of the waterproof member 250 and is bent toward the inner panel 102. On the other hand, on the side surface of the connector 205, a hook portion 281 that extends from the front end side of the connector toward the base end side of the side surface and that can be engaged with the bent portion 269 in the connector housing portion 261 is formed at the front end. A cantilevered hook 283 was formed.

  According to such a configuration, water that has entered the outside of the inner panel 102 is provided between the inner panel 102 and the ECU unit 201, and the first through hole of the inner panel 102 is provided on one end side. A flange portion 253 that is a first contact portion that closely contacts the periphery of the first through hole 102a is formed, and the periphery of the second through hole 231 of the ECU unit 201 is formed on the other end side. Intrusion into the ECU unit 201 is prevented by a cylindrical boot portion formed with an end face 251a that is a second contact portion that is in close contact with the entire circumference of the two through holes 231.

  The water that has entered the inside of the inner panel 102 is brought into contact with the control circuit board 210 by the first protrusion 271 and the second protrusion 273 of the pin facing portion 263 of the connector housing portion 261, thereby causing the water in the ECU unit 201 to move. Intrusion is prevented.

  Further, since the size of the third through hole 265 of the pin facing portion 263 of the connector housing portion 261 having elasticity is set smaller than the cross section of the pin 233, the pin 233 and the third through hole 265 are press-fitted. It becomes. Therefore, the water that has entered the inner side of the inner panel 102 cannot pass through the third through hole 265 and is prevented from entering the ECU unit 201, so that the water can enter from the inner side of the inner panel 102. Thus, the waterproof function is further improved.

  The present invention is not limited to the above embodiment. In the above embodiment, the size of the third through hole 265 of the pin facing portion 263 of the connector housing portion 261 is set smaller than the cross section of the pin 233, so that the pin 233 and the third through hole 265 are press-fitted. However, even if the pin 233 and the through hole 265 are not press-fitted, it is possible to prevent water that has entered the inside of the inner panel 102 from entering the ECU unit 201.

  Moreover, although the 1st protrusion 271 and the 2nd protrusion 273 were provided in the pin opposing part 263 of the connector housing part 261, only either one protrusion may be sufficient. Further, the first protrusion 271 and the second protrusion 273 may be eliminated, and the entire pin facing portion 263 may be in close contact with the control circuit board 210.

  Furthermore, the shape of the first protrusion 271 formed on the connector housing portion 261 is not limited to the shape shown in FIG. For example, as shown in FIG. 1 (d), a first protrusion 271 'facing the side surface of the pin 233 via a gap may be formed. In this case, the pin 233 can be easily inserted. Further, since the front end surface of the first protrusion 271 ′ is in close contact with the control circuit 210, it is possible to prevent water from entering from the inner panel 102.

1A is a cross-sectional view illustrating an ECU unit, and is a cross-sectional view taken along a cutting line BB in FIG. 2, FIG. 1B is an enlarged view of a portion C in FIG. FIG. 3C is an enlarged view of a portion D in FIG. 1A, and FIG. 4D is a diagram illustrating another example of the first protrusion in FIG. It is a disassembled perspective view of an ECU unit. 3A is a perspective view of the ECU cover as viewed from the direction of arrow C in FIG. 2, and FIG. 3B is a perspective view in which the connector housing portion in FIG. 3A is partially broken. It is a top view of the state which removed the inner panel of the door. FIG. 5 is a cross-sectional view taken along a cutting line AA in FIG. 4. It is a figure explaining the structure of a door panel. It is a figure explaining the conventional waterproof structure of the electronic control apparatus provided in the door panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 102 Inner panel 102a 1st through hole 201 ECU unit 203 Wiring 205 Connector 210 Control circuit board 231 2nd through hole 233 Pin 251 Boot part 251a End surface 253 Brim part 261 Connector housing part 263 Pin opposing part 265 3rd through hole

Claims (4)

Waterproofing of an electronic control device, which is arranged together with an electric actuator between an outer panel and an inner panel of a vehicle door and to which wiring is connected from the inside of the inner panel through a first through hole formed in the inner panel. In structure
In the electronic control device, a second through hole is formed in a portion facing the inner panel, a control circuit board is provided inside, and a portion of the control circuit board facing the second through hole is formed. Is provided with a pin that extends toward the second through hole and is connected to the connector of the wiring,
A waterproof member including a cylindrical boot portion and a bag-like connector housing portion is provided between the inner panel and the electronic device, and the first end portion side of the boot portion has the first portion. A first contact portion is formed to closely contact the periphery of the first through hole over the entire circumference of the first through hole, and the second end portion side of the boot portion is surrounded by the second through hole of the electronic device. A second contact portion that is in close contact with the entire circumference of the second through hole is formed on one end side of the connector housing portion, and is opposed to a pin of the control circuit board inside the electronic control device. Part is formed, the other end side of the connector housing part is connected over the entire circumference of the inner surface of the boot part, and further, a third through hole through which the pin is inserted is formed in the pin facing part,
The wiring is inserted from the inside of the inner panel, through the first through hole of the inner panel, through the boot portion of the prevention member, and connected to the pin.
The waterproof structure for an electronic control device, wherein the pin facing portion of the connector housing portion is in close contact with the substrate. The connector housing part has elasticity,
2. The waterproof structure for an electronic control device according to claim 1, wherein a size of the third through hole of the pin facing portion of the connector housing portion is set smaller than a cross section of the pin. In the pin facing portion of the connector housing portion,
The first protrusion that protrudes in the direction of the substrate along the third through hole along the entire circumference of the third through hole and that can contact the substrate is formed. The waterproof structure of the electronic control device according to 1.   A second protrusion that protrudes in the direction of the board along the peripheral edge of the pin-opposing part of the connector housing part and that can contact the board is formed over the entire circumference of the connector housing part. The waterproof structure of the electronic control device according to claim 1.

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