JP2016062697A - connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a short circuit between a female terminal and a shield shell.SOLUTION: A connector 11 of the present invention includes: a female terminal 15 inserted in an inner housing 13; an outer housing 17 enclosing the inner housing; a slip-off preventing lance 47 which is located at an opening 45 arranged to the inner housing and is formed to be displaceable toward the female terminal 15 to be inserted in the inner housing; and a shield shell 19 accommodated in the outer housing and having a cutout part 49 where a site corresponding to the opening 45 is cutout. The inner housing 13 is provided with a partition wall 39 formed at between the opening 45a and an edge part of the cutout part 49 of the shield shell 19 which face to each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a connector having a shield shell.

  Conventionally, a large number of electric devices mounted on vehicles such as electric cars and hybrid cars are connected to each other via electric wires of a wire harness. In this case, the connection between the electric device and the electric wire or the connection between the electric wires is performed via a connector. This connector is electrically connected by fitting a male connector and a female connector.

  5 and 6 show examples of female connectors. The female connector 81 includes two cylindrical inner housings 83, female terminals 85 inserted into the inner housings 83, an outer housing 87 that surrounds the inner housings 83, and a metal that is accommodated in the outer housing 87. The shield shell 89 is provided. The inner housing 83 and the outer housing 87 are integrally formed of synthetic resin to form a female housing 91. The inner housing 83 is provided with an opening 93 cut out in the axial direction, and a retaining lance 95 that locks the female terminal 85 that is positioned in the opening 93 and is inserted into the inner housing 83.

  The shield shell 89 is provided so as to abut against the outer peripheral surface 97 of the inner housing 83 so as to enclose each inner housing 83. The shield shell 89 is provided with a cutout portion 99 in which a portion corresponding to the opening 93 of the inner housing 83 is cut out, and the retaining lance 95 can be displaced outward through the cutout portion 99 ( For example, see Patent Document 1).

JP 2009-245642 A

  However, in this type of connector, as shown in FIG. 6, the creeping distance L1 between the female terminal 85 exposed from the opening 93 of the inner housing 83 and the edge of the notch 99 of the shield shell 89 is short. For example, the female terminal 85 and the shield shell 89 may be short-circuited by moisture or the like when a high voltage is applied.

  This invention is made | formed in view of such a problem, and makes it a subject to prevent the short circuit of a female terminal and a shield shell.

  In order to solve the above problems, a connector according to the present invention includes a cylindrical inner housing, a female terminal inserted into the inner housing, a cylindrical outer housing surrounding the inner housing, and an opening provided in the inner housing. A retaining lance formed so as to be displaceable toward a female terminal inserted into the inner housing, and a shield shell having a cutout portion housed in the outer housing and cut out at a portion corresponding to the opening. The inner housing is characterized in that a partition wall is provided between the opening and the edge of the cutout portion of the shield shell.

  According to this, since the creeping distance between the female terminal and the shield shell can be increased by the partition wall, a short circuit between the female terminal and the shield shell can be prevented.

  In this case, the partition wall may be in contact with the edge surface of the cutout portion of the shield shell.

  According to this, since the shield shell can be supported by the partition wall, it is possible to prevent the displacement (backlash) of the shield shell.

  Further, the partition walls are respectively provided in the inner housings on both sides of the opening, and these partition walls are closed with a top plate to form a cross-sectional gate shape, and the top plate can regulate the displacement of the retaining lance. .

  According to this, since the displacement of the retaining lance can be suppressed within the set range, damage due to the excessive displacement of the retaining lance can be prevented.

  According to the present invention, it is possible to prevent a short circuit between the female terminal and the shield shell.

It is a perspective view which shows the external appearance of the connector with which this invention is applied. It is a perspective view of the internal structure of the connector with which this invention is applied. It is sectional drawing which looked at the connector with which this invention is applied from the top. It is sectional drawing which looked at the connector with which this invention is applied from the side. It is a perspective view which shows the external appearance of the conventional connector. It is a perspective view of the internal structure of the conventional connector.

  Hereinafter, an embodiment of a connector to which the present invention is applied will be described with reference to the drawings. In the present embodiment, a connector for connecting electrical devices mounted on a vehicle such as an electric vehicle or a hybrid car will be described as an example. However, the connector of the present invention is not limited to these applications, It can be applied to a connection device for use.

  FIG. 1 is an external perspective view showing the overall configuration of an embodiment of a connector to which the present invention is applied, and FIG. 2 is a perspective view showing the inside of the connector of FIG. The connector 11 of the present embodiment is a female connector that accommodates a female terminal to which an electric wire is connected, and is electrically connected to each other by fitting with a male connector (not shown) that accommodates a male terminal to which another electric wire is connected. Are connected to each other. Each electric wire is connected to a different electric device or the like.

  As shown in FIGS. 1 and 2, the connector 11 includes two cylindrical inner housings 13, cylindrical female terminals 15 inserted into the inner housings 13, and a cylindrical shape surrounding these inner housings 13. An outer housing 17 and a shield shell 19 accommodated in the outer housing 17 are provided. The inner housing 13 and the outer housing 17 are integrally formed of synthetic resin to form a female housing 21. In the following description, the X direction in FIG. 1 is defined as the axial direction of the connector (the left side in the figure is the front), the Y direction is the width direction of the connector, and the Z direction is the height direction of the connector (the upper side in the figure is upward).

  The outer housing 17 is formed by connecting a fitting portion 23 to be fitted to a mating male connector and an electric wire holding portion 27 for holding the electric wire 25 in the axial direction. The fitting portion 23 has an insertion port 29 that opens at the front end thereof, and a male housing of a male connector is inserted through the insertion port 29. A front end portion of the inner housing 13 is positioned inside the insertion port 29. The electric wire holding part 27 is formed to be slightly smaller in outer peripheral surface than the fitting part 23 and holds the electric wire 25 drawn out from the inner housing 13 with packing or the like housed inside.

  The two inner housings 13 are formed symmetrically and are provided so as to extend substantially parallel to the axis of the outer housing 17, respectively, and a terminal accommodating chamber 31 (FIG. 4) for accommodating the female terminal 15 is formed inside. . The inner housings 13 are spaced apart from each other in the width direction by the fitting portion 23 of the outer housing 17, and are connected to each other in a cylindrical shape inside the vicinity of the boundary between the fitting portion 23 and the wire holding portion 27, and are integrated with the outer housing 17. It has become. The female terminal 15 is inserted into the terminal housing chamber 31 from the rear in the inner housing 13. The female terminal 15 inserted in the regular position of the terminal accommodating chamber 31 is exposed and held through the first opening 33 that opens to the front of the inner housing 13.

  The inner housing 13 is provided with a protruding portion 37 in which the outer peripheral wall 35 is raised in a cross-sectional gate shape. The projecting portion 37 is provided along the axial direction from the front end of the outer peripheral wall 35, and is formed by closing the top ends of a pair of plate-like partition walls 39 facing each other with a top plate 41. The pair of partition walls 39 are set up substantially parallel to each other, and are provided with a smaller interval than the dimension in the width direction of the terminal accommodating chamber 31. A space 43 formed by being surrounded by the protruding portion 37 is connected to the terminal accommodating chamber 31 through a second opening 45 that opens the outer peripheral wall 35. A retaining lance 47 is positioned between the space 43 and the terminal accommodating chamber 31, that is, in the second opening 45. The protruding portion 37 is provided so as to completely surround the second opening 45 including the retaining lance 47 except for the opening at the front end that is continuous with the first opening 33 of the inner housing 13.

  The shield shell 19 is formed by molding a metal plate into a cylindrical shape, and has two cutout portions 49 cut out in the axial direction from the front end. The shield shell 19 is inserted from the rear of the outer housing 17, and the rear base end abuts on the inner side of the annular holding portion 50 formed inside the outer housing 17, and surrounds the two inner housings 13. Supported by Further, the projecting portion 37 of the inner housing 13 is fitted into the shield shell 19 inside the notch 49. The protruding portion 37 protrudes above the shield shell 19 through the notch portion 49, and the pair of partition walls 39 are in contact with the edge surfaces of the notch portion 49. The inner housing 13 is positioned so as to protrude forward from the front end of the shield shell 19, and the protruding inner housing 13 is covered with a shield shell 19 of a male connector.

  FIG. 3 is a cross-sectional view when the connector is viewed from above, and FIG. 4 is a cross-sectional view when the connector is viewed from the width direction. In FIG. 3, the projecting portion 37 is omitted for easy understanding of the internal structure of the inner housing 13. A second opening 45 is provided in the outer peripheral wall 35 of the inner housing 13. The second opening 45 is formed so as to extend in a rectangular shape in the axial direction from the front end of the inner housing 13 to the rear when viewed from above, and in the rear end portion of the second opening 45 in the axial direction toward the front. A retaining lance 47 extending in a cantilevered manner is supported. The retaining lance 47 extends to the middle of the front of the inner housing 13 with a distance from both side surfaces of the second opening 45 in the width direction, and is displaceable toward the female terminal 15 inserted into the inner housing 13. Provided.

  The retaining lance 47 extends to the middle of the front of the inner housing 13 with a gap from both side surfaces of the second opening 45 in the width direction. As shown in FIG. 4, the retaining lance 47 is provided so as to be displaceable toward the female terminal 15 inserted into the inner housing 13. When the female terminal 15 is inserted into the terminal accommodating chamber 31, the female terminal 15 is provided. The space portion 43 can be displaced (elastically deformed) by elastic deformation. The female terminal 15 displaced in the space 43 is in contact with the top plate 41 of the projecting portion 37 so that the displacement is regulated.

  The second opening 45 is formed on the outer peripheral wall 35 of the inner housing 13 so as to surround the retaining lance 47 so that the retaining lance 47 can be displaced. In the present embodiment, in order to form the retaining lance 47 on the outer peripheral wall 35 of the inner housing 13, the second opening 45 is formed to extend to the front end of the inner housing 13 due to the structure of the mold. However, the formation area of the second opening 45 is not limited to this, and the retaining lance 47 may be provided so as to be separated from the surrounding outer peripheral wall 35 and displaceable. In this case, the protruding portion 37 does not need to be formed up to the front end of the inner housing 13, and may be formed by raising the partition wall 39 from both sides in the width direction of the second opening 45.

  As shown in FIG. 4, the retaining lance 47 is provided so as to be surrounded by the protruding portion 37, and is provided with an engaging protrusion 51 that engages with the female terminal 15. The female terminal 15 is configured by accommodating a spring terminal 53 in a metal cylindrical case 55. The spring terminal 53 is formed in a cylindrical shape made of metal, and a plurality of slits 57 extending in the axial direction are provided in the circumferential direction of the cylindrical side wall. The spring terminal 53 has a spring property by bending the side wall inward. The male terminal inserted in 53 can be pressed from the circumferential direction.

  The case 55 has a stepped shape in which the rear outer peripheral surface 59 is smaller than the front outer peripheral surface 61, and the engagement protrusion 51 of the retaining lance is locked to the stepped portion. The case is provided with a wire crimping portion 63 in a row, and the exposed conductor portion of the wire 25 is crimped and connected. In FIG. 4, the electric wire 25 is omitted.

  The female terminal 15 having the end of the electric wire 25 connected to the electric wire crimping portion 63 is inserted into the terminal accommodating chamber 31 from the rear of the inner housing 13. When the female terminal 15 inserted into the terminal insertion chamber 31 is inserted while the front end of the case 55 pushes up the engaging protrusion 51 of the retaining lance 47 toward the space 43, and the outer peripheral surface 61 gets over the engaging protrusion 51. The engagement protrusion 51 is elastically restored and engaged with the step portion of the case 55. Further, the female terminal 15 is brought into contact with the locking wall 65 at the distal end portion of the inner housing 13 with the engaging protrusion 51 engaged with the stepped portion. As a result, the female terminal 15 is held between the locking wall 65 and the engaging projection 51 to prevent the female terminal 15 from coming off.

  When the mating male housing is fitted into the female housing 21, the male terminal inserted into the inner housing 13 is connected to the female terminal 15, and the male housing is inserted into the outer housing 17. An annular packing attached to the outer peripheral surface of the inner housing 13 is provided between the inner peripheral surface of the male housing inserted into the outer housing 17 and the outer peripheral surface of the inner housing 13 integrated within the fitting portion 23. 67 is sealed.

  According to the present embodiment, since the second opening 45 of the inner housing 13 is surrounded by the protruding portion 37, the female terminal 15 exposed from the second opening 45 and the shield shell 19 are notched as shown in FIG. The creepage distance L2 with the edge of the portion 49 can be increased. That is, the partition 39 is provided at a position where the female terminal 15 exposed from the second opening 45 faces the edge of the cutout portion 49 of the shield shell 19, that is, on both sides in the width direction of the second opening 45. Thereby, since the partition wall 39 is disposed so as to partition between the female terminal 15 and the shield shell 19, the creepage distance L2 can be made longer than the creepage distance L1 of FIG. Moreover, it is possible to prevent water droplets and the like from accumulating along the creeping region. Therefore, even when a high voltage is applied to each terminal, a short circuit between the female terminal 15 and the shield shell 19 can be reliably prevented, and the function of the shield shell 19 can be maintained.

  In the present embodiment, since the pair of partition walls 39 of the projecting portion 37 is in contact with the edge surface of the cutout portion 49 of the shield shell 19, the shield shell 19 is not only the rear base end portion but also the front portion. The tip 39 can be supported by the partition wall 39. Thereby, the position shift (rattle) of the shield shell 19 can be reliably prevented.

  Further, in the present embodiment, the protruding portion 37 is formed by closing the pair of partition walls 39 with the top plate 41, and the retaining lance 47 displaced by a predetermined amount comes into contact with the top plate 41 to regulate the displacement of the retaining lance 47. I am doing so. Accordingly, when the female terminal 15 is inserted into the inner housing 13 or when the female terminal 15 is pulled out from the inner housing 13, the retaining lance 47 is prevented from being damaged due to excessive displacement. it can. Moreover, since the strength of the pair of partition walls 39 can be increased by providing the top plate 41, the deformation of the partition walls 39 can be prevented and the shield shell 19 can be reliably held.

  As mentioned above, although embodiment of this invention was explained in full detail with drawing, said embodiment is only the illustration of this invention, It can change and change within the range described in the claim. is there.

  For example, in the present embodiment, the protruding portion 37 is formed by closing the pair of partition walls 39 with the top plate 41, but the top plate 41 may be omitted. That is, even if the top plate 41 is not provided, the position where the female terminal 15 exposed from the second opening 45 faces the edge of the cutout portion 49 of the shield shell 19, that is, the width direction of the second opening 45. Partition walls 39 may be provided on both sides of the wall. Thereby, since the creeping distance L2 between the female terminal 15 and the shield shell 19 can be extended along the partition wall 39, a short circuit between the female terminal 15 and the shield shell 19 can be prevented. The partition wall 39 is not necessarily provided up to the front end of the second opening 45, and may be provided halfway.

  Further, in the present embodiment, the projecting portion 37 is formed in a gate shape in section, but is not limited to this shape, and the position where the female terminal 15 and the edge portion of the cutout portion 49 of the shield shell 19 face each other. It suffices if any partition wall is provided on the wall.

DESCRIPTION OF SYMBOLS 11 Connector 13 Inner housing 15 Female terminal 17 Outer housing 19 Shield shell 21 Female housing 35 Outer peripheral wall 37 Protrusion part 39 Bulkhead 41 Top plate 45 2nd opening 47 Retaining lance 49 Notch part

Claims (3)

A cylindrical inner housing, a female terminal inserted into the inner housing, a cylindrical outer housing surrounding the inner housing, and an opening provided in the inner housing, are inserted into the inner housing. A retaining lance formed to be displaceable toward the female terminal, and a shield shell that is housed in the outer housing and has a cutout portion that is cut out at a portion corresponding to the opening,
The inner housing is a connector in which a partition is provided between the opening and an edge of the cutout portion of the shield shell.   The connector according to claim 1, wherein the partition wall is in contact with an edge surface of the cutout portion of the shield shell.   The partition walls are respectively provided in the inner housings on both sides of the opening, and the partition walls are closed and formed in a cross-sectional gate shape, and the top plate regulates displacement of the retaining lance. The connector according to claim 1 or 2.

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