JP2014235922A - Packing for connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing which exhibits superior durability of peeling inhibition, by suppressing the peeling of a rubber-like elastic body from a resin component, in a packing for connector consisting of a combination of a resin component and a rubber-like elastic body.SOLUTION: An outward flange is provided at one end, in the central axis direction, of a cylindrical packing body consisting of a rubber-like elastic body. At least the outer periphery of the flange is formed of a resin component, and the rubber-like elastic body is joined to the resin component by insert molding. The resin component is integrally provided, on the inner peripheral side of a body where the flange is formed, with an attachment part buried in the rubber-like elastic body, and provided with a step by the inner peripheral surface of the body and one end face of the attachment part, on the inner peripheral side of a body. The step is partially filled with the rubber-like elastic body. Furthermore, a plurality of protrusions are provided in the circumferential direction on one end face of the attachment part, and the height of the protrusions is set equally or substantially equally to the depth of the step.

Description

  The present invention relates to a connector packing that performs a sealing function in a housing portion of a connector.

  As shown in FIG. 4A, the connector 51 of the electrical system is provided with a packing 54 so as to seal between the pair of connector housings 52 and 53 when the connector 51 is connected. It is configured as follows.

  That is, as shown in FIG. 4B, the packing 54 is fitted on the outer peripheral side of the mounting portion 52a of one mounting housing 52 (not shown in FIG. 4B but see FIG. 4A). The packing main body 55 is provided with an outward flange portion 56 at one end in the central axis direction of the packing main body 55, and is formed in a substantially L-shaped cross section as a whole.

  The packing body 55 is formed of a rubber-like elastic body 57, the flange portion 56 is formed of a resin part 58, and the rubber-like elastic body 57 is joined to the resin part 58 by performing insert molding. In order to increase the bonding force, the resin component 58 is integrally provided with an attachment portion 60 as an anchor portion on the inner peripheral side of the main body portion 59 forming the flange portion 56, and is embedded in the rubber-like elastic body 57. Has been. Some attachment portions 60 have an anchor effect enhanced by providing a through hole 61 that penetrates in the thickness direction.

  As described above, the packing 54 having the above configuration has the packing main body 55 fitted on the outer peripheral side of the mounting portion 52a of one mounting housing 52, and the mating housing 53 is further positioned on the outer peripheral side of the packing main body 55 when the connector 51 is connected. Inserted (arrow C).

  The packing 54 is a combination of the rubber-like elastic body 57 and the resin component 58 as described above in order to facilitate the attachment / detachment of the counterpart housing 53 and to prevent deformation and removal of the packing 54. A low-hardness material is used for the elastic body 57 in order to ensure ease of attachment / detachment of the housing 53, and the deformation of the packing 54 and prevention of removal are achieved by utilizing the rigidity of the resin component 58.

  However, the following problems are pointed out with respect to the conventional connector packing 54.

That is, regarding the shape of the resin component 58, the resin component 58 is integrally provided with the mounting portion 60 as the anchor portion on the inner peripheral side of the main body portion 59 forming the flange portion 56 as described above. The thickness t ₂ of the mounting portion 60 is thinner than the thickness t ₁ of the main body portion 59, and as a result, the inner peripheral surface 59 a of the main body portion 59 and the central axis of the mounting portion 60 are disposed on the inner peripheral side of the main body portion 59. A stepped portion 62 is provided by one end surface 60a, and the stepped portion 62 is filled with a part of the rubber-like elastic body 57.

  On the other hand, when insert molding is performed using a rubber mold, a resin part 58 manufactured in advance in a part shape is placed in the cavity space of the mold. At this time, the resin part 58 is placed in a corner of the cavity space. In particular, the stepped portion 62 is disposed at the most corner of the cavity space. Further, the stepped portion 62 is disposed at the end of the flow of the rubber material in the cavity space.

  Therefore, when the rubber material is injected into the cavity space, the mounting portion 60 may be deformed by the injection pressure as shown in FIG. 5, and in this case, the molding is performed in a state where the mounting portion 60 is deformed in this way. A situation occurs in which the thickness of the rubber-like elastic body 57 molded to 62 is insufficient, and this causes the rubber-like elastic body 57 to easily peel off from the resin component 58. The rubber elastic body 57 is not filled at all in a part of the stepped portion 62 in the circumferential direction, and the end surface 60a of the mounting portion 60 may remain exposed.

JP2003-249297A (FIGS. 3 to 4)

  In view of the above points, the present invention can effectively prevent the rubber-like elastic body from being peeled off from the resin part in the connector packing made of a combination of the resin part and the rubber-like elastic body, thereby preventing the peeling. An object of the present invention is to provide a packing having excellent durability.

  In order to achieve the above object, a connector packing according to claim 1 of the present invention is provided with an outward flange portion at one end in the central axial direction of a cylindrical packing body made of a rubber-like elastic body. At least the outer peripheral part of the part is formed of a resin part, and the rubber-like elastic body is joined to the resin part by insert molding, and the resin part has an inner peripheral side of the body part on which the flange part is formed. The mounting portion embedded in the rubber-like elastic body is integrally provided, and on the inner peripheral side of the main body portion, a step portion is provided by the inner peripheral surface of the main body portion and one end surface of the mounting portion. A connector packing in which a part of the rubber-like elastic body is filled in the stepped portion, and a plurality of protrusions are provided in a circumferential direction on one end surface of the mounting portion, and the height of the protrusion is Step Characterized in that it is set in the depth equal to or substantially equal.

  According to a second aspect of the present invention, there is provided the connector packing according to the first aspect, wherein the resin is provided by providing a protrusion on the other end face of the mounting portion provided with the protrusion on one end face. The parts are characterized by being symmetrical parts in the thickness direction.

  In the connector packing of the present invention having the above-described configuration, with respect to the shape of the resin component, an attachment portion embedded in a rubber-like elastic body is integrally provided on the inner peripheral side of the main body portion forming the flange portion, On the inner circumference side, a step portion is provided by the inner peripheral surface of the main body portion and one end face of the attachment portion, and one of the attachment portions is provided on the assumption that a part of the elastic elastic body is filled in the step portion. A plurality of protrusions are provided in the circumferential direction on the end surface of the mold, and the height of the protrusion is set to be equal to or substantially equal to the depth of the stepped portion. Therefore, when the resin part is placed at the corner of the mold cavity, the protrusion As a support, it is possible to suppress the mounting portion from being deformed by the injection pressure of the rubber material.

  Since a plurality of protrusions are provided in the circumferential direction, the rubber material is filled into the space between the main body portion and the protrusions through the gaps between the protrusions. After forming by filling and heating, the protrusions are exposed at the tip of the rubber-like elastic body. However, the protrusion is rubber-elastic by attaching the rubber-like elastic body to the tip of the protrusion in the form of a thin film. It may be completely embedded in the body.

  In addition, when the protrusion is supported as described above and the mounting portion is prevented from being deformed by the injection pressure of the rubber material, the thickness of the mounting portion can be set to be thinner than the conventional one (by reducing the thickness). Accordingly, it is possible to set the depth of the step portion deeper than the conventional one. If the depth of the stepped portion is set deep, the stepped portion is easily filled with a rubber material, and the pressure in the stepped portion is increased, so that the mounting portion is not easily deformed from this point.

  In addition, the projection may be provided only on one end surface of the mounting portion because of the above-mentioned action, but in this case, when placing the resin component on the corner of the cavity of the mold, the orientation to be placed is considered. In other words, the mounting directionality is defined when the resin component is placed in the cavity of the mold. Therefore, in order to avoid this, it is preferable to provide a resin part with a symmetrical shape in the thickness direction by providing a protrusion on the other end face of the mounting portion provided with a protrusion on one end face. In this way, since the mounting may be in any direction, the directionality of the mounting is not defined, so that the work efficiency can be improved accordingly.

  The present invention has the following effects.

  That is, in the present invention, as described above, a plurality of protrusions are provided in the circumferential direction on one end surface of the mounting portion, and the height of the protrusion is set to be equal to or substantially equal to the depth of the stepped portion. When the component is placed at the corner of the cavity of the mold, the protrusions serve as a support, and the mounting portion is prevented from being deformed by the injection pressure of the rubber material. Therefore, it can suppress that the situation where the thickness of the rubber-like elastic body shape | molded by a level | step-difference part runs short, and can suppress that a rubber-like elastic body peels with respect to a resin component. Therefore, according to the intended purpose of the present invention, in the connector packing made of a combination of a resin part and a rubber-like elastic body, it is possible to effectively prevent the rubber-like elastic body from peeling off from the resin part, thereby preventing the peeling. A packing having excellent durability can be provided. In addition, by providing protrusions on both end surfaces of the mounting part of the resin part and making the resin part a symmetrical part in its thickness direction, the mounting directionality will not be defined, thus improving the work efficiency. can do.

FIG. 1A is a front view of a connector packing according to an embodiment of the present invention, FIG. 1B is a cross-sectional view thereof, and is a cross-sectional view taken along line C-0-D in FIG. Figure FIG. 2A is a front view of the resin component provided in the connector packing, FIG. 2B is a sectional view thereof, and a sectional view taken along line E-0-F in FIG. Perspective view of the resin part 4A is an explanatory diagram of the connector, and FIG. 4B is a partial cross-sectional view of the connector packing according to the conventional example. Explanatory drawing showing the state of failure occurrence in the connector packing

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a connector packing 11 according to an embodiment of the present invention. The packing 11 according to this embodiment seals between a pair of connector housings when the connector is connected, and is configured as follows. Has been.

  That is, the packing 11 includes a cylindrical packing body 12 fitted on the outer peripheral side of the mounting portion of one mounting housing, and an outward flange portion 13 at one end in the central axis direction of the packing body 12. And has a substantially L-shaped cross section as a whole.

The packing body 12 is formed by a rubber-like elastic body 14 including the inner peripheral portion of the flange portion 13, and the outer peripheral portion of the flange portion 13 is formed by a resin part 15, and the former rubber-like elastic body 14 is the latter resin part. 15 is joined by insert molding. Further, in order to increase this bonding force, the resin component 15 is integrally provided with an attachment portion 17 which is located on the inner peripheral side of the main body portion 16 forming the flange portion 13 and acts as an anchor portion. It is embedded in the rubber-like elastic body 14. The thickness t ₂ of the mounting portion 17 is thinner than the thickness t ₁ of the main body portion 16, and one end surface of the inner peripheral surface 16 a of the main body portion 16 and the central axis of the mounting portion 17 is disposed on the inner peripheral side of the main body portion 16. A step portion 18 by 17 a is provided, and a part of the rubber-like elastic body 14 is filled in the step portion 18. In order to enhance the anchor effect, the attachment portion 17 may be provided with a through hole penetrating in the thickness direction.

  2 and 3 show the resin component 15 provided in the packing 11 alone.

As described above, the resin component 15 is integrally provided with the body portion 16 that forms the flange portion 13 and the attachment portion 17 that forms the anchor portion, and the thickness t ₁ of the attachment portion 17 with respect to the thickness t ₁ of the body portion 16. ₂ is set to be thin (small), and the mounting portion 17 is disposed at the central portion in the thickness direction of the main body portion 16.

On the inner peripheral side of the main body portion 16, a step portion 18 having a right-angle cross section is provided by the inner peripheral surface 16 a of the main body portion 16 and one end surface 17 a of the central axis of the attachment portion 17. A plurality of protrusions 19 are provided in the circumferential direction on one end surface 17a of the central axis of the portion 17, and in the drawing, the protrusions 19 are provided at eight equal positions. The height h ₁ of the protrusions 19 is set to equal to or substantially equal to the depth d ₁ of the step portion 18.

Further, a step portion 20 having a right-angle cross section is provided on the inner peripheral side of the main body portion 16 by the inner peripheral surface 16 a of the main body portion 16 and the other end surface 17 b of the central axis of the mounting portion 17, and is located in the step portion 20. A plurality of projections 21 are provided in the circumferential direction on the other end surface 17b of the central axis of the mounting portion 17, and in the drawing, the projections 21 are provided at eight equal positions. The height h ₂ of the protrusions 21 is set to equal to or substantially equal to the depth d ₂ of the step portion 20.

  The protrusion 19 provided on one end surface 17a of the central axis and the protrusion 21 provided on the other end surface 17b of the central axis are provided symmetrically in the thickness direction of the resin component 15, and the resin component 15 has a thickness as a whole. The parts are symmetrical in direction.

In the connector packing 11 having the above configuration, with respect to the shape of the resin component 15, a mounting portion 17 embedded in the rubber-like elastic body 14 is integrally provided on the inner peripheral side of the main body portion 16 that forms the flange portion 13. A stepped portion 18 is provided on the inner peripheral side of the main body portion 16 by the inner peripheral surface 16a of the main body portion 16 and one end surface 17a of the mounting portion 17, and when the stepped portion 18 is filled with a part of the rubber-like elastic body 14. under the assumption that, one end face 17a to the protrusion 18 is provided with a plurality in the circumferential direction of the mounting portion 17, the height h ₁ of the protrusions 18 is set to equal to or substantially equal to the depth d ₁ of the step portion 18 Therefore, when the resin component 15 is placed at the corner of the cavity of the mold, the protrusion 18 serves as a support, and the deformation of the mounting portion 17 due to the injection pressure of the rubber material is suppressed. . Therefore, it is possible to suppress the occurrence of a situation where the thickness of the rubber-like elastic body 14 formed on the step portion 18 is insufficient, and to prevent the rubber-like elastic body 14 from peeling off from the resin component 15. Therefore, in the connector packing made of a combination of the resin component 15 and the rubber-like elastic body 14, the rubber-like elastic body 14 is effectively suppressed from peeling off from the resin component 15, and the packing 11 is excellent in durability for preventing peeling. Can be provided.

  In addition, since the protrusions 19 and 20 are provided on both end surfaces 17a and 17b of the mounting portion 17 of the resin component 15 so that the resin component 15 is a symmetrical component in the thickness direction, the resin component 15 is mounted. Directionality is not specified. Therefore, the work efficiency when inserting the resin component 15 into the mold can be improved.

  In the above embodiment, the connector packing 11 has an annular shape when viewed from the front. However, the front shape of the connector packing 11 is not limited to an annular shape, for example, as shown in FIG. Such a rectangle may be used.

  When the front shape of the connector packing 11 is a rectangle, the front shape of the resin component 15 is also a rectangle. When the front shape of the resin component 15 is rectangular, the protrusions are provided at, for example, eight corners of the four corners of the rectangle and the central portions of the four sides of the rectangle.

DESCRIPTION OF SYMBOLS 11 Packing 12 Packing main body 13 Flange part 14 Rubber-like elastic body 15 Resin component 16 Main body part 16a Inner peripheral surface 17 Mounting part 17a, 17b End surface 18, 20 Step part 19, 21 Protrusion

Claims (2)

An outward flange portion is provided at one end in the central axial direction of the cylindrical packing body made of a rubber-like elastic body,
The flange portion is formed of a resin part at least at the outer periphery thereof,
The rubber-like elastic body is bonded to the resin component by performing insert molding,
The resin part is integrally provided with an attachment portion embedded in the rubber-like elastic body on the inner peripheral side of the main body portion forming the flange portion,
On the inner peripheral side of the main body portion, a step portion is provided by the inner peripheral surface of the main body portion and one end surface of the attachment portion,
A connector packing in which the stepped portion is filled with a part of the rubber-like elastic body,
A plurality of protrusions are provided in the circumferential direction on one end surface of the mounting portion,
The connector packing, wherein the height of the protrusion is set equal to or substantially equal to the depth of the stepped portion. The connector packing according to claim 1,
A connector packing according to claim 1, wherein the resin part is formed into a symmetrical part in the thickness direction by providing a protrusion on the other end face of the mounting portion provided with the protrusion on one end face.

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