JP2009295491A - Packing, and structure for fitting packing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain waterproof performance of a packing without a cost increase. <P>SOLUTION: The packing 10 includes a packing body 11 to be crimped by facing surfaces 21, 32 of a relay connector 20 and an inverter case 30, positioning parts 12 provided in projection from the packing body 11 and having positioning holes 15 through which positioning pins 28 provided in projection from the relay connector 20 can be inserted, and a cap 14 mounted on the positioning pins 28 inserted through the positioning holes 15 and preventing fall-off of the positioning parts 12. Between an inner circumferential face of the positioning hole 15 and an outer circumferential face of the positioning pin 28, there is formed a gap. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a packing and a packing mounting structure.

2. Description of the Related Art Conventionally, as an attachment structure for attaching a packing to a connector, for example, one described in Patent Document 1 below is known. This is provided with a positioning pin protruding from the connector as a positioning structure when the packing is attached to the connector. On the other hand, the packing is provided with a positioning portion having a positioning hole through which the positioning pin is inserted. The positioning hole can be press-fitted with a positioning pin, whereby the packing is held by the connector.
JP 2004-327169 A

  However, since the packing is a rubber product, and a rubber product is generally difficult to achieve molding accuracy, a positioning hole may be formed at a position shifted from a normal position. In such a case, if the packing is forcibly attached to the connector, the packing is deformed and the waterproof performance is deteriorated. However, if the molding accuracy of the packing is to be increased, a die with higher accuracy is required, and the die cost is increased.

  The present invention has been completed based on the above circumstances, and an object thereof is to maintain the waterproof performance of the packing without causing an increase in cost.

  The present invention relates to a packing body that is pressure-bonded at a mating surface of a connector and a mating member, a positioning portion that has a positioning hole that extends from the packing body and that can be inserted through a positioning pin that protrudes from the connector, and positioning A packing that is attached to a positioning pin inserted through a hole and has a retaining portion that prevents the positioning portion from coming off, and a gap is formed between the inner peripheral surface of the positioning hole and the outer peripheral surface of the positioning pin. It has the characteristics in the configuration.

  According to such a structure, it can mount | wear to a mating surface, without changing a packing main body. That is, even if the positioning hole is formed at a position deviated from the normal position, the position deviation of the positioning hole can be absorbed. Furthermore, the positioning portion can be held in the retaining state by the retaining portion. Thus, since the deformation of the packing body can be prevented without using a highly accurate mold, the waterproof performance of the packing can be maintained without incurring an increase in cost.

The following configuration is preferable as an embodiment of the present invention.
The retaining portion may be a cap that is press-fitted into a positioning pin inserted through the positioning hole.
According to such a configuration, the positioning portion can be prevented from coming off by press-fitting the cap into the positioning pin. Further, since the tip of the positioning pin is covered with the cap, it is easy to push the cap.

The retaining portion may be configured to hold the positioning portion on the connector by pressing the peripheral portion of the positioning hole.
According to such a configuration, the positioning portion can be held on the connector by the retaining portion.

The retaining portion and the positioning portion may be configured to have flexibility and to be connected by a connecting portion having a folded shape.
According to such a configuration, since the retaining portion is connected to the positioning portion via the connecting portion, handling becomes easy. Further, even when the positioning hole is displaced with respect to the positioning pin, the displacement can be absorbed by the connecting portion, and the retaining portion can be attached to the positioning pin.

In the packing mounting structure described above, the connector may include a housing that is mounted in a mounting hole provided in the mating member, and the packing body may be configured to be crimped at a mating surface between the housing and the opening edge of the mounting hole. Good.
If it does in this way, a packing main body can be crimped | bonded between the housing and the opening edge part of the attachment hole of the other party member.

  According to the present invention, the waterproof performance of the packing can be maintained without increasing the cost.

<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to the drawings of FIGS. The packing 10 of this embodiment is attached to the mating surface 21 of the relay connector 20 which has a surface seal structure, as shown in FIG. 1 and FIG. As shown in FIGS. 3 and 4, the relay connector 20 is used by being mounted in a mounting hole 31 of an inverter case (an example of the “partner member” of the present invention) 30 incorporated in an electric vehicle, a hybrid vehicle, or the like. The

  As shown in FIG. 1, the packing 10 is made of a synthetic resin. The cap 14 etc. which were connected with the positioning part 12 via the connection part 13 in FIG. Four positioning portions 12 are arranged corresponding to the four corners of the packing body 11. Further, the thickness of the positioning portion 12 is thinner than the packing body 11. Further, the thickness of the connecting portion 13 is approximately the same as the thickness of the positioning portion 12.

  As shown in FIG. 2, the relay connector 20 includes a synthetic resin housing 22, and a pair of mounting portions 23 are provided to protrude on both sides of the housing 22 in the width direction. The attachment portion 23 has a substantially triangular shape, and a cylindrical metal collar 40 is insert-molded in the attachment portion 23. The collar 40 has a height that is slightly larger than the plate thickness of the mounting portion 23. In addition, the mating surfaces 21 and 32 are configured by a portion where the housing 22 and the inverter case 30 face each other.

  On the other hand, a bolt hole 33 for fastening the bolt 50 is formed in the mating surface 32 of the inverter case 30. Thus, the bolt 50 is tightened into the bolt hole 33, and the collar 40 is sandwiched between the bolt 50 and the opening edge of the bolt hole 33, whereby the relay connector 20 is fixed to the inverter case 30.

  As shown in FIG. 3, a pair of hood portions 24 are provided on both sides of the housing 22 in the front-rear direction (the fitting direction with the mating connector). The hood part 24 on the front side (inverter case 30 side in FIG. 3) has a hood shape that opens to the front side, and the hood part 24 on the rear side (opposite side to the inverter case 30 in FIG. 3) opens to the rear side. It has a hood shape. Both hood portions 24 are provided at positions corresponding to the front-rear direction.

  The front hood portion 24 is configured to protrude forward from the mating surface 21 and is inserted into an attachment hole 31 provided in the inverter case 30. On the other hand, the rear hood portion 24 is configured to protrude rearward from the mounting portion 23. The front hood portion 24 is formed slightly smaller than the rear hood portion 24.

  A plurality of terminals 26 are fixed to the back walls 25 of both hood portions 24 through the back wall 25 in the front-rear direction by press-fitting or insert molding. The front and rear end portions of these terminals 26 are disposed closer to the back wall 25 than the opening edges of both hood portions 24, respectively. For this reason, the terminal 26 is covered with both the hood parts 24, and can protect the terminal 26 effectively with respect to the impact from a side.

  A mounting groove 27 in which the packing main body 11 is mounted is provided around the front hood portion 24 on the mating surface 21. The mounting groove 27 is formed one step lower than the mating surface 21. When the packing body 11 is mounted in the mounting groove 27, the packing body 11 is set so as to protrude from the mating surface 21. For this reason, when the relay connector 20 is fixed to the inverter case 30, the packing body 11 is crimped between the mounting groove 27 and the opening edge of the mounting hole 31.

  In the housing 22, a positioning pin 28 projects from the inner peripheral side of the mounting groove 27. Four positioning pins 28 are arranged corresponding to the four corners of the front hood portion 24. The outer diameter of the positioning pin 28 is formed larger than the inner diameter of the cap 14. For this reason, the cap 14 is press-fitted while being expanded in diameter relative to the positioning pin 28. Further, the width of the mounting groove 27 is larger than the width of the packing body 11. For this reason, the position of the packing body 11 attached to the attachment groove 27 can be adjusted inside the attachment groove 27.

  Here, a positioning hole 15 is formed through each positioning portion 12 of the packing 10. The positioning hole 15 is a positioning hole for attaching the packing body 11 to the attachment groove 27. That is, by inserting the positioning hole 15 through the positioning pin 28, the packing body 11 is positioned, and the packing body 11 can be easily attached to the mounting groove 27.

  However, since the packing 10 is a rubber product, and the rubber product is difficult to obtain molding accuracy, the positioning hole 15 may be molded at a position shifted from the positioning pin 28 in some cases. In such a case, when the positioning hole 15 is inserted into the positioning pin 28, the packing body 11 is pulled between the positioning pins 28, or the packing body 11 is brought between the positioning pins 28. If the packing main body 11 is pressure-bonded between the attachment groove 27 and the opening edge of the attachment hole 31 in such a state, the waterproof performance is deteriorated.

  Therefore, a gap is formed between the inner peripheral surface of the positioning hole 15 and the outer peripheral surface of the positioning pin 28 in order to absorb the molding error of the positioning hole 15. That is, the inner diameter L2 of the positioning hole 15 is larger than the outer diameter L1 of the positioning pin 28. Thereby, the molding error of the positioning hole 15 can be absorbed and the packing main body 11 can be attached to the attachment groove 27 without being deformed, and the waterproof performance of the packing 10 can be maintained.

  The depth dimension inside the cap 14 is substantially the same as or slightly larger than the height dimension of the portion of the positioning pin 28 protruding through the positioning hole 15. For this reason, it becomes possible to press down the peripheral part of the positioning hole 15 with the cap 14, and the positioning part 12 can be fixed to the housing 22.

  Further, even when the positioning hole 15 is displaced from the positioning pin 28, the position of the cap 14 is always press-fitted into the position of the positioning pin 28, so that the cap 14 moves relative to the positioning hole 15. It needs to be possible. In this respect, since the cap 14 is connected by the flexible connecting portion 13 and the connecting portion 13 is formed in a folded shape, the relative positional relationship between the positioning hole 15 and the cap 14 can be adjusted. it can.

Next, a method for attaching the packing 10 to the relay connector 20 and a method for attaching the relay connector 20 to the inverter case 30 will be described.
In order to attach the packing 10 to the relay connector 20, first, each positioning hole 15 is inserted into each positioning pin 28. Here, even if the positioning hole 15 is misaligned, the positioning hole 15 is formed larger than the conventional one, so that the positioning hole 15 can be inserted into the positioning pin 28 without deforming the packing body 11. Can do.

  Then, the head of the cap 14 is pressed into the positioning pin 28 by pressing with the finger. Then, the positioning part 12 is held by the housing 22, and the packing body 11 is held by the mounting groove 27. Thereby, the packing 10 is attached to the relay connector 20.

  To attach the relay connector 20 to the inverter case 30, the front hood portion 24 is inserted into the attachment hole 31 so that the mating surfaces 21 and 32 face each other. Next, the bolt 50 is tightened into the bolt hole 33 through the collar 40. With this tightening, the packing body 11 is sandwiched between the mounting groove 27 and the opening edge of the mounting hole 31. Then, as shown in FIG. 4, the packing body 11 is in close contact with both the mounting groove 27 and the opening edge of the mounting hole 31, and the inside of the mounting hole 31 is waterproofed.

  As described above, according to the present embodiment, since the inner diameter L2 of the positioning hole 15 is formed larger than the outer diameter L1 of the positioning pin 28, the molding error of the positioning hole 15 can be absorbed. In addition, since it is not necessary to use a mold with higher accuracy, an increase in cost can be avoided.

  Further, since the cap 14 can be press-fitted into the positioning pin 28 by pressing the cap 14 with a finger, the mounting operation of the cap 14 is facilitated. In addition, since the peripheral edge of the positioning hole 15 is pressed by the cap 14, the packing 10 can be held by the relay connector 20. Further, since the flexible connecting portion 13 is formed in a folded shape, the relative positional relationship between the cap 14 and the positioning hole 15 can be adjusted, and the cap 14 can be handled integrally with the packing 10. Handling becomes easy.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Although the inverter case 30 is illustrated as the mating member in this embodiment, according to the present invention, a mounting bracket or the like may be used as the mating member.

  (2) Although the relay connector 20 is illustrated as a connector in this embodiment, according to the present invention, it may be a connector connected to the terminal of the wire harness.

  (3) Although the cap 14 is illustrated as the retaining portion in the present embodiment, according to the present invention, a circular hole is formed in place of the cap 14, and the diameter of the circular hole is set outside the positioning pin 28. It may be smaller than the diameter L1 and can be press-fitted.

  (4) In the present embodiment, the peripheral edge of the positioning hole 15 is pressed by the cap 14, but according to the present invention, the peripheral edge of the positioning hole 15 does not necessarily have to be pressed, It may be one that can only be stopped.

  (5) Although the cap 14 is connected to the positioning portion 12 via the connecting portion 13 in this embodiment, the cap 14 may be provided separately from the positioning portion 12 according to the present invention.

Front view of packing Front view of relay connector with packing Sectional view of the state before fixing the relay connector with packing attached to the inverter case from the side Sectional view of the relay connector with packing attached to the inverter case as seen from the side FIG. 3 is a partially enlarged view of the packing in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Packing 11 ... Packing main body 12 ... Positioning part 13 ... Connection part 14 ... Cap 15 ... Positioning hole 20 ... Relay connector (connector)
21 ... mating surface 22 ... housing 28 ... positioning pin 30 ... inverter case (mating member)
31 ... Mounting hole 32 ... Mating surface

Claims (5)

A packing body that is crimped at the mating surface of the connector and the mating member;
A positioning part that has a positioning hole that extends from the packing body and that can be inserted through a positioning pin that protrudes from the connector;
A packing provided with the positioning pin inserted into the positioning hole and having a retaining portion for preventing the positioning portion from being removed,
A packing, wherein a gap is formed between an inner peripheral surface of the positioning hole and an outer peripheral surface of the positioning pin. The packing according to claim 1, wherein the retaining portion is a cap that is press-fitted into the positioning pin inserted through the positioning hole. The packing according to claim 1 or 2, wherein the retaining portion holds the positioning portion on the connector by pressing a peripheral portion of the positioning hole. The packing according to any one of claims 1 to 3, wherein the retaining portion and the positioning portion have flexibility and are connected by a connecting portion having a folded shape. 5. The packing mounting structure according to claim 1, wherein the connector includes a housing mounted in a mounting hole provided in the mating member, and the packing body includes the housing. And a packing mounting structure that is pressure-bonded at the mating surface of the opening edge of the mounting hole.

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