JP5557069B2 - connector - Google Patents

Description

  The present invention relates to a connector provided with a lance for locking a terminal fitting.

  For example, in an electric vehicle, a connector described in Patent Document 1 is known as a connector for supplying power to devices such as a motor and an inverter housed in a metal case. This connector consists of a wire-side connector attached to the end portion of the wire and a device-side connector attached to a mounting hole penetrating in the inside and outside of the case, and a terminal provided on each connector by fitting both connectors. It is the structure which mutually contacts.

  The housing provided in the electric wire side connector has a cavity formed therethrough, and a plurality of terminal fittings connected to the end of the electric wire are accommodated in the cavity. A lance for locking the terminal fitting is formed inside the cavity. On the other hand, the terminal fitting is formed with a lance locking hole for locking with the lance. This terminal fitting has a structure in which the lance is bent and inserted into the cavity, and the lance is locked in the lance locking hole so that the terminal fitting is held in a state of being prevented from being detached from the housing. The lance can be elastically deformed, and is retracted into a bending allowable space formed at a position adjacent to the bending direction of the lance at the time of elastic deformation.

  By the way, conventionally, in order to maintain the locking of the lance and the lance locking hole, it has been known that a retainer formed by a separate part from the housing is introduced into the bending allowable space of the lance to restrict the bending deformation of the lance. It has been. By providing the retainer, the terminal fitting is securely held in the housing by double locking by the lance and the retainer.

JP 2005-11646 A

  However, according to the above structure, a retainer must be provided separately from the housing, and a mounting portion for mounting the retainer and a lock mechanism for holding the retainer on the mounting portion must be provided on the housing. However, there is a concern that the size of the housing increases and the number of parts increases.

  The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a connector that can be miniaturized while increasing the holding strength of the terminal fitting by the double locking structure.

The present invention includes a first housing and a second housing each having a pair of cavities for receiving terminal fittings and fitted to each other, and a pair of first terminal fittings respectively attached to the cavities of the first housing. When the first, respectively the deflection provided deformably to a pair of deflection allowable space provided in the housing, with and sealed engagement with the first terminal fitting mounted in the cavity respectively achieved retaining from said cavity A pair of lances that release the locking state of the first terminal fitting by elastically deforming into each of the bending allowance spaces, and the cavity of the second housing, respectively , and the fitting of the two housings and at the first terminal fitting and the respective connectable pair of second terminal fittings, the fitting direction of the first housing to the second housing A pair of retainer projections to disable flexural deformation of the unlocking direction of the lance enters the respective allowable deformation space above protrudes above while being guided by the first housing when the two housings, The first housing and the second housing are provided with a bolt and a female screw part for fitting the two housings by screwing together, and the length dimension of the bolt is The engagement of the two housings is set so that the bolt and the female threaded portion start to be screwed after the tip of the retainer protruding portion enters the bending allowable space, and the pair of retainer protruding portions are And on the straight line connecting the pair of second terminal fittings, the bolts and the female screw portions are arranged to face each other at an equal distance from the center of the straight line as a boundary. It characterized in that it is arranged on the side deviated from a straight line connecting the two terminal fittings.

According to such a structure, when both the first and second housings are fitted, the retainer protrusion provided on the second housing enters the bending allowable space of the first housing. As a result, the lance of the first housing is regulated so as not to bend and deform in the unlocking direction of the first terminal fitting, so that the first terminal fitting is double-locked and the holding strength of the first terminal fitting is increased. . Also, if the lance is not properly locked with respect to the first terminal fitting, the lance is deformed and protrudes into the allowable bending space. When the retainer protrusion is about to enter the bending allowable space, the retainer protrusion comes into contact with the lance and is prevented from being further fitted, so that it can be immediately detected that the retainer is in a poorly locked state. In addition, since the retainer protrusion is provided on the second housing, it can function as a guide when fitted to the first housing. Moreover, since the retainer protrusion is formed integrally with the second housing, an increase in the number of parts can be suppressed and the connector body can be downsized.
In addition, since the screw and the female screw portion start to be screwed after the tip of the retainer protrusion enters the bending allowable space, in a state where the lance is not in a normal locking state protruding into the bending space, It is possible to prevent damage to the lance and the retainer protrusion by forcibly engaging the bolt and the female thread.

  Two cavities are provided in the first housing, and each lance provided in each of the cavities may be formed at a position near the center of the first housing among the side portions of the cavities. Good. According to such a structure, since the two retainer protrusions that disable the deformation of the lance in the unlocking direction can be concentrated on the central portion of the first housing, the retainer protrusion can be damaged. Prevention becomes possible.

  The first housing is provided with a fitting detection connector between the two lances, and the both retainer protrusions are positioned so as to sandwich the fitting detection connector when the two connectors are fitted. It is good. As a result, even if the connector is provided with a connector for detecting the fitting, the retainer protrusion can be guided into the allowable space by using the connector for detecting the fitting. Can be

  ADVANTAGE OF THE INVENTION According to this invention, the connector which can be reduced in size can be provided, improving the holding strength of a terminal metal fitting by a double latching structure.

The exploded perspective view of the electric wire side connector concerning this embodiment The exploded perspective view of the equipment side connector concerning this embodiment The perspective view before fitting of both the connectors concerning this embodiment Front side sectional view of the connector according to this embodiment before mating The top view of the fitting surface side with the apparatus side connector of the electric wire side connector concerning this embodiment The top view of the fitting surface side with the electric wire side connector of the apparatus side connector concerning this embodiment Front side sectional view of the connector according to the present embodiment in a temporarily fitted state Side sectional view of the connector in the state shown in FIG. Front side sectional view of the connector according to this embodiment in a fitted state FIG. 9 is a side sectional view of the connector in the state shown in FIG.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS.
The connector in the present embodiment exemplifies a case where it is applied to a connector that supplies electric power to an in-vehicle device (not shown) (for example, a motor or an inverter mounted on a hybrid vehicle or the like). The side connector 10 (refer FIG. 1) and the apparatus side connector 30 (refer FIG. 2) fixed to the apparatus side are provided. In the following description, the fitting surface side of both connectors 10 and 30 will be described as the front. This device includes a metal case (not shown) having a shield function, and a connector mounting hole (not shown) penetrating the inside and outside of the case is formed in the case.

  The first housing 10A constituting the electric wire side connector 10 is made of synthetic resin, and as shown in FIGS. 1 and 4, a pair of cylindrical portions 11 are integrally formed in a side-by-side state separated by a predetermined distance. A cavity 12 extending in the front-rear direction is formed inside the portion 11. In each cavity 12, female terminals 14 corresponding to first terminal fittings connected to the electric wires 13 can be accommodated from the rear. An O-ring receiving groove 15 having an oval cross section in which both cylindrical portions 11 are integrally connected is formed in an intermediate portion in the front-rear direction of both cylindrical portions 11, and a seal ring 16 is attached thereto.

  An interlock fitting portion 17 corresponding to a rectangular tube-shaped fitting detection connector portion is provided between the tip portions of the cylindrical portions 11 with a predetermined gap from each cylindrical portion 11. A short-circuit terminal 18 having a pair of male terminals is disposed inside the interlock fitting portion 17, and is fitted with an interlock connector 40 provided in a device-side connector 30 to be described later. The fitting with the device side connector 30 can be detected.

  As shown in FIGS. 1 and 3, the electric wire side connector 10 is provided with a first shield shell 50 made of aluminum die cast that is fitted and attached to the first housing 10 </ b> A from the rear. A fixing portion 51 for fixing to the second shield shell 60 described later is provided on the side portion of the first shield shell 50 so as to bulge, and a female screw provided protruding from the side portion of the second shield shell 60. It is adapted to be externally fitted to the base portion 65.

  A bolt insertion hole 54 is provided in the rear wall of the fixing portion 51 of the first shield shell 50 (see FIG. 8), and a fitting bolt 56 is inserted through the bolt insertion hole 54 and is prevented by the retaining ring 55. The fitting bolt 56 is a hexagonal chamfering set screw having a rod-shaped tip portion 56A in which a screw groove is not formed at the tip of the screw shaft 56B. The fitting bolt 56 is screwed into a screw hole 66 formed on a female screw base portion 65 of the second shield shell 60 described later.

  As shown in FIG. 1, each female terminal 14 has a substantially cylindrical shape extending in the front-rear direction, and includes a crimping portion 14 </ b> A that is crimped to a terminal portion of the electric wire 13 at the rear end portion. A rubber plug 20 is fitted on the electric wire 13 crimped to the crimping portion 14 </ b> A, and the space between the electric wire 13 and the inner peripheral surface of the rear half of the cylindrical portion 11 is sealed. In addition, a back retainer 21 is fitted on the electric wire 13 further behind the rubber plug 20 to prevent the rubber plug 20 from coming out from the rear end portion of the cylindrical portion 11.

  Each cylindrical portion 11 is formed with a lance 19 for locking the female terminal 14 in the cavity 12 as shown in FIGS. Each lance 19 is formed in a cantilever shape with the front side as a free end at the side of the cylindrical portion 11, and a locking projection 19 </ b> A protruding into the cavity 12 is provided at the tip, which is a female mold. The female terminal 14 is prevented from coming off by engaging with the shoulder portion 14B located on the front side of the crimping portion 14A of the terminal 14. Each lance 19 is formed on a side portion on the intermediate portion side (interlock fitting portion 17 side) in the arrangement direction of the two cylindrical portions 11, and the bending direction of each lance 19 is substantially the same as that of the wire-side connector 10. The direction is toward the center (interlock fitting portion 17 side).

  Between each lance 19 and the side wall surface of the interlock fitting portion 17, a bending allowance space having a dimension that allows elastic deformation for the locking projection 19 </ b> A of the lance 19 to be engaged with and disengaged from the female terminal 14. 22 is formed. A retainer guide groove 23 that guides a retainer protrusion 34 (described later) to enter the bendable space 22 is connected to the front side of the bendable space 22, and the retainer guide groove 23 is a fitting surface with the device-side connector 30. Open to the side.

  On the other hand, the 2nd housing 30A which comprises the apparatus side connector 30 is a product made from a synthetic resin, and as shown to FIG. 2, 4, the cylindrical hood part 31 which can fit each cylindrical part 11 of the electric wire side connector 10 inside. Have On the proximal end side of the cylindrical hood portion 31, there are provided a plate-like flange portion 32 that protrudes outward over the entire circumference, and a device-side connection portion 33 that protrudes rearward from the rear surface of the flange portion 32.

  The device-side connector 30 includes a second shield shell 60 that is fitted and mounted from the front of the second housing 30A. The second shield shell 60 is made of aluminum die cast and covers the entire peripheral surface of the cylindrical hood portion 31 from the flange portion 32 as shown in FIGS. The second shield shell 60 is on the fitting surface side with the wire-side connector 10 and has a cylindrical second main body portion 61 and a mounting flange projecting from the rear end portion of the second main body portion 61 to the outer periphery over the entire circumference. A mounting screw insertion hole 63 for mounting on a case (not shown) is formed in the upper left corner and the lower right corner in FIG. 6 of the mounting flange 62, respectively. ing. As shown in FIG. 2, rubber is provided on the front surface of the flange portion 32 of the second housing 30 </ b> A so as to be in close contact with the outer surface of the case (not shown) and seal between the peripheral portion of the connector mounting hole (not shown) and the device-side connector 30. A packing 64 is provided.

  In addition, on the front side of FIG. 3 in the second main body portion 61 of the second shield shell 60, there is a female screw base portion 65 fitted so as to be wrapped in the fixing portion 51 of the first shield shell 50. A screw hole 66 corresponding to the female screw portion into which the fitting bolt 56 is screwed is provided in the female screw stand portion 65. In addition, as shown in FIG. 2, a shield-side rubber ring 67 is attached to the outer peripheral end of the second main body 61 of the second shield shell 60.

  Now, as shown in FIGS. 4 and 6, two male terminals 35 corresponding to the second terminal fitting are accommodated in the second housing 30A. Among the male terminals 35, the terminal main body portion 36 connected to the device side is molded in the device side connection portion 33, and the pin terminal portion 37 formed integrally with the terminal main body portion 36 is a cylindrical hood. It protrudes coaxially into the part 31.

  As shown in FIGS. 2 and 4, at the rear end portion of the device-side connection portion 33 of the second housing 30 </ b> A, an interlock housing portion 38 penetrates in the front-rear direction at a substantially intermediate portion in the lateral direction of the terminal body portion 36. The interlock connector 40 is attached here. The interlock connector 40 is inserted from the device-side connecting portion 33 side, and an interlock retainer 41 for preventing the interlock connector 40 from coming off from the rear side of the second housing 30A is mounted.

  Two plate-like retainer projections 34 shown in FIGS. 2 and 4 are formed forward from the inner wall of the cylindrical hood portion 31, and about half of the tip side protrudes from the front end portion of the cylindrical hood portion 31. ing. As shown in FIGS. 4 and 6, the retainer projection 34 is formed by extending the lateral side wall of the interlock storage portion 38 forward, and is in a facing state with a predetermined interval. The lateral width b (see FIG. 6) of each retainer projection 34 is set to be larger than the width dimension a (see FIG. 5) of the back portion 19B of the lance 19 (the portion located on the deflection allowable space 22 side), and On the surfaces of the retainer protrusions 34 opposite to each other, when the retainer protrusions 34 enter the bending allowance space 22 from the retainer guide grooves 23, fitting grooves 34 </ b> A (FIG. 2) that accommodate the back portion 19 </ b> B of the lance 19. , 6). The groove width c (see FIG. 6) of the fitting groove 34A is set to a dimension substantially equal to the width dimension a (see FIG. 5) of the back part 19B so that the back part 19B of the lance 19 can be accommodated.

The present embodiment has the above-described configuration, and the assembly procedure will be described with reference to FIGS.
First, the device-side connector 30 with the second shield shell 60 covered in advance is attached so as to be inserted through a connector attachment hole opened in a case (not shown). That is, the second shield shell 60 side is positioned outside the device (not shown), and the mounting screw insertion hole 63 on the second shield shell 60 and the screw hole of the case (not shown) are overlapped. The second shield shell 60 is fixed to the case (not shown) in a conductive manner by screwing a screw (not shown) therein. The gap between the outer wall surface of the case (not shown) and the second shield shell 60 and the second housing 30A is waterproofed by the rubber packing 64.

  In this state, the electric wire side connector 10 is fitted to the device side connector 30. First, as shown in FIG. 3, the fitting is performed while positioning so that the fixing portion 51 of the first shield shell 50 overlaps the female screw base portion 65 of the second shield shell 60. At this time, the retainer protrusion 34 of the device-side connector 30 is inserted into the retainer guide groove 23 of the wire-side connector 10 and is in a temporarily fitted state. In the present embodiment, as shown in FIGS. 7 and 8, the tip of the retainer projection 34 of the device-side connector 30 only slightly enters the bending allowable space 22 of the wire-side connector 10. The state in which the housing 60 and the two housings 10A and 30A are not in the completely fitted state is referred to as a temporarily fitted state. In this state, as shown in FIG. 8, the rod-shaped tip 56A of the fitting bolt 56 has entered the screw hole 66, but the screw shaft 56B is not engaged with the screw hole 66, and so-called screw threads are inserted. There is no bite.

  When the device-side connector 30 is further pressed against the wire-side connector 10 from this temporarily fitted state, the retainer protrusion 34 enters deeper into the bending allowable space 22. At this time, the retainer projection 34 enters the back side of the allowable bending space 22 while fitting the back portion 19B of the lance 19 into the fitting groove portion 34A. As a result, the screw shaft 56B of the fitting bolt 56 comes into engagement with the screw hole 66 of the second shield shell 60, so that the fitting bolt 56 is screwed into the screw hole by rotating the fitting bolt 56 with, for example, a wrench. 66, the shield housings 50 and 60 are attracted to each other, and the connectors 10 and 30 are brought into the fitted state shown in FIGS. 9 and 10, and the pin terminal portion 37 is completely inserted into the female terminal 14. And become conductive. In this state, the shield-side rubber ring 67 attached to the outer peripheral edge of the second main body 61 is in close contact with the inner periphery of the first shield shell 50, so that the fitting peripheral surfaces of both shield shells 50 and 60 are waterproofed. The

  In this fitting completion state, the entire retainer protrusion 34 is located in the bending allowable space 22 of the lance 19, and even if a tensile force acts on the electric wire 13 and the female terminal 14 tries to come out of the cavity 12. Since the lance 19 is prevented from being bent in the disengagement direction by the retainer protrusion 34, the engagement of the lance 19 is not released, and the female terminal 14 is reliably double-locked.

  When the device-side connector 30 is fitted to the wire-side connector 10, the interlock connector 40 is fitted to the interlock fitting portion 17, and the fitting is detected by a fitting detection circuit (not shown) to close the relay or the like. Thus, the power supply circuit is in a state where it can be energized.

  As described above, in the present embodiment, it is possible to prevent the female terminal 14 from coming off by restricting the bending of the lance 19 of the device-side connector 30 by the retainer protrusion 34 provided on the wire-side connector 10. For this reason, it is not necessary to provide the wire-side connector 10 with a retainer part for double-locking the lance 19, and it is not necessary to provide a lock mechanism for holding the retainer part on the wire-side connector 10.

  In the present embodiment, for example, when the female terminal 14 is in a half-inserted state in the cavity 12 and is not in a normal locking state by the lance 19, the lance 19 is deformed to be within the bending allowable space 22. Since it is in a protruding state, when the connectors 10 and 30 are to be fitted, the tip of the retainer protrusion 34 comes into contact with the protruding lance 19 when it tries to enter the bending allowable space 22. Since the above fitting is prevented and the temporary fitting state is not reached, it is possible to immediately detect that the female terminal 14 is in a poorly locked state.

  Furthermore, in this embodiment, the length dimension of the screw shaft 56B of the fitting bolt 56 is such that the fitting bolt 56 is inserted after the distal ends of the retainer projections 34 are bent into the allowable space 22 by fitting the connectors 10 and 30 together. And the screw hole 66 are started to be engaged, and after the connectors 10 and 30 reach the temporarily fitted state, the wire side connector 10 is further pushed into the device side connector 30 side for the first time. The screw shaft 56 </ b> B of the combination bolt 56 meshes with the screw groove of the screw hole 66. As a result, even if an electric power tool such as an impact wrench is used in the above-mentioned poorly locked state, even the temporarily fitted state is not reached, so that the fitting bolt 56 and the screw hole 66 may be screwed together. There is no. Therefore, it is possible to prevent the lance 19 and the retainer projection 34 from being damaged by forcibly fitting in a state of poor locking.

  In addition, by providing the retainer protrusion 34 integrally with the second housing 30A, when the electric wire side connector 10 is fitted, the retainer protrusion 34 is fitted in the correct direction with respect to the device side connector 30. 34 can be fitted while guiding the wire-side connector 10. Note that the fitting groove 34A of the retainer projection 34 engages so as to surround both side portions of the back portion 19B of the lance 19. Thereby, after the position of the vertical direction (up-down direction of FIG. 5, 6) in the apparatus side connector 30 of the electric wire side connector 10 is substantially determined by the retainer protrusion part 34, both the connectors 10 and 30 are made into a fitting state. You can take it. With the guide function of the retainer protrusion 34 as described above, the electric wire side connector 10 can be correctly fitted to each other without being obliquely fitted to the device side connector 30.

  Furthermore, since the retainer protrusion 34 is integrally formed with the second housing 30A, an increase in the number of parts can be suppressed and the connector body can be downsized. Regarding the downsizing, in the conventional structure in which the retainer is provided as a separate body, a lock mechanism for holding the retainer on the wire side connector 10 is required. However, in the present invention, the retainer protrusion 34 is provided on the second housing 30A. Since they are integrated, the locking mechanism is not necessary, and the space between the interlock fitting portion 17 and the cavity 12 can be used effectively, so that the overall size can be reduced.

  The retainer protrusions 34 are concentrated near the center of the second housing 30A so that the strength of the retainer protrusions 34 can be improved, and damage to the retainer protrusions 34 due to excessive connector fitting. Can be prevented.

<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) In the present embodiment, the lance 19 is provided at a substantially central portion in the width direction of the first housing 10A, and the retainer protrusion 34 has a side wall in the width direction in the interlock housing portion 38 of the second housing 30A on the electric wire side. Although it is formed in the shape of two plates protruding in the fitting direction with the connector 10, the lance 19 is not limited to this and is located on both sides in the width direction of the first housing 10 </ b> A and is more than each cavity 12. The bending allowance space 22 is provided in the outer peripheral direction, and the retainer protrusion 34 may be configured to be inserted into both side portions in the width direction of the first housing 10A.

DESCRIPTION OF SYMBOLS 10 ... Electric wire side connector 10A ... 1st housing 12 ... Cavity 14 ... Female terminal (1st terminal metal fitting)
DESCRIPTION OF SYMBOLS 19 ... Lance 22 ... Deflection allowable space 23 ... Retainer guide groove 30 ... Equipment side connector 30A ... 2nd housing 34 ... Retainer protrusion 35 ... Male terminal (2nd terminal metal fitting)
56 ... Mating bolt (bolt)
66 ... Screw hole (Female thread)

Claims (3)

A first housing and a second housing each having a pair of cavities for receiving terminal fittings and fitted to each other;
A pair of first terminal fittings respectively attached to the cavities of the first housing;
Wherein the first respective deflection provided deformably to a pair of deflection allowable space provided in the housing, and the first terminal fitting mounted in the cavity sealed respectively engaged, there is ensured a retaining from said cavity, A pair of lances that release the locking state of the first terminal fitting by elastically deforming into each of the bending allowance spaces;
Said second respectively provided to the cavity of the housing, the pair can be respectively connected to the first terminal fitting when the two housings second terminal fittings,
The second provided projecting in the fitting direction of the first housing to the housing, the unlocking of the lance enters each of the deflection allowable space while being guided by the first housing when the two housings A pair of retainer protrusions that disable bending deformation in the direction,
The first housing and the second housing are provided with bolts and female screw portions for fitting the two housings by screwing together,
The length dimension of the bolt is set so that the screw and the female thread portion are started to be screwed after the end of the retainer protrusion enters the bending allowable space by fitting the two housings .
The pair of retainer protrusions are arranged on a straight line connecting the pair of second terminal fittings so as to face each other at an equal distance from the center of the straight line as a boundary,
The said bolt and the internal thread part are distribute | arranged to the side part which remove | deviated from the straight line which ties the said 2nd terminal metal fitting . The portion between the pair of retainer protrusions is fitted with a portion between the pair of lances in the first housing when the first housing and the second housing are fitted. connector. The connector according to claim 1 or claim 2, characterized in that it is formed at a position of the central portion side of the first housing of the pair of lance, the sides of the pre-crisis Yabiti.

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