JP5840175B2 - Connector and connector unit - Google Patents

Description

  The present invention relates to, for example, a connector and a connector unit that are connected to a device-side connector such as a motor, an inverter, or a general electronic device mounted on an electric vehicle or a hybrid vehicle.

Conventionally, when a motor mounted on an electric vehicle as described above is driven by electric power supplied from a battery for power supply, a power supply side connector connected to the power supply side via a plurality of coated wires is connected to the motor or A power source side and a device side are electrically connected by connecting to a device-side connector provided on the device side such as an inverter.
However, when an external force such as vibration or bending is applied to the covered electric wire led out of the power supply side connector due to running vibration generated when the electric vehicle is driven, the electric vehicle is accommodated in the connector via the covered electric wire. Therefore, it is necessary to provide a means for restricting the external force applied to the covered electric wire because the external force is easily transmitted to the terminal and causes a connection failure.

  If there is no means for regulating the above-described external force, for example, as shown in FIG. 14, not only the vibration or bending that occurs in the covered electric wire 210 led out of the power supply side housing 230 of the power supply side connector 200 increases, External forces such as vibration and bending are directly applied to the crimping part 221 where the covered electric wire 210 is crimped and connected to the female terminal 220 housed in the power supply side housing 230 and the elastic contact piece 222 which connects the male terminal (not shown). Therefore, poor connection is likely to occur.

  Therefore, in recent years, as a connector provided with means for regulating the external force described above, for example, a terminal to which a covered electric wire is connected is accommodated in a terminal accommodating chamber of the housing, and the covered electric wire connected to the terminal is inserted into the electric wire insertion cylinder of the housing. There has been proposed a waterproof connector that holds a covered electric wire led out from the portion and inserted into the electric wire insertion tube portion with a back retainer attached to an end portion of the electric wire insertion tube portion (see Patent Document 1).

  However, the waterproof connector of Patent Document 1 has a short holding width in the longitudinal direction of the covered electric wire that holds the covered electric wire by the back retainer only by holding the covered electric wire inserted into the electric wire insertion tube portion by the back retainer. The effect of restricting the external force applied to the covered electric wire led out of the connector is low, and the suppression effect of suppressing the external force applied to the terminal accommodated in the connector cannot be expected.

JP 2010-246339 A

  The present invention reliably suppresses an external force applied to a covered electric wire led out of a connector and a terminal accommodated in the connector, and reliably prevents a connection failure from occurring. The purpose is to provide units.

The present invention is attached to a housing provided with a terminal accommodating chamber for accommodating a terminal, a wire lead-out portion formed outside the housing and connected to the terminal, and led to the outside, and an end portion of the wire lead-out portion. a connector in which a back retainer provided, the back retainer, the wire holding portion for holding the covered wires in the wire draw-out portion is provided, the electric wire holding portion in the longitudinal direction of the axial said covered wire is formed in a substantially tubular shape extending in the outer peripheral surface of the covered electric wire in a state of close contact longitudinally with the wire holding hole for inserting the covered wire is provided, substantially tubular shield shell that covers the housing comprises A locking projection that protrudes toward the outside of the housing is provided on an outer periphery of an end of the housing corresponding to the back retainer, and the back retainer corresponds to the back retainer. A locking portion for locking the locking protrusion of the housing is provided on the outer periphery of the end portion of the yield shell, and the locking protrusion and the locking portion are provided on the edge of the back retainer corresponding to the locking protrusion. It is a connector provided with the erroneous release prevention part which covers the latching | locking part from the outside .

According to the present invention, the external force applied to the covered electric wire led out of the connector and the terminal accommodated in the connector can be reliably suppressed, and the occurrence of poor connection can be reliably prevented.
Specifically, in the state where the terminal to which the covered electric wire is connected is accommodated in the terminal accommodating chamber of the housing of the connector, the electric wire of the back retainer in which the covered electric wire in the electric wire outlet portion of the housing is attached to the end portion of the electric wire outlet portion. While holding with a holding | maintenance part, the electric wire holding hole of this electric wire holding | maintenance part is closely_contact | adhered to a longitudinal direction with respect to the outer peripheral surface of a covered electric wire.

  For example, even if the covered electric wire led to the outside of the connector vibrates or bends due to running vibration generated when the electric vehicle runs, the covered electric wire and the electric wire holding part are in close contact over a predetermined width in the longitudinal direction. Thus, the external force applied to the covered electric wire is regulated by the back retainer, and the external force can be prevented from being transmitted to the terminals accommodated in the connector.

Thereby, for example, it is possible to reliably suppress external force applied to the crimped portion where the covered electric wire is crimped and connected to the terminal accommodated in the connector and the contact portion connecting the other terminal.
As a result, it is possible to reliably prevent a connection failure from occurring in the terminals accommodated in the connector, and to supply a predetermined power stably.

  Further, it is possible to prevent the housing and the shield shell from being erroneously released.
  More specifically, when the back retainer is attached to the end of the wire lead-out portion of the housing, the locking projection of the housing is locked to the locking portion of the shield shell, and the locking projection of the housing and the locking portion of the shield shell The locking part is covered from the outside by the erroneous release prevention part of the back retainer.

  Thereby, for example, a tool or the like can be prevented from accessing the locking protrusion of the housing locked to the locking portion of the shield shell.
  As a result, for example, it is possible to prevent the locking projection and the locking portion from being erroneously locked by the access of the tool or the like, that is, the fixing of the housing and the shield shell is released.

As aspect of the invention, the back retainer, formed of a plurality of split retainer, the each divided retainers, be characterized in that it is equipped with recesses which can be brought into close contact with the longitudinal direction with respect to the outer circumferential surface of the covered wire Can do.
According to this invention, the assembly workability | operativity in a connector can be improved more.

  Specifically, for example, when an integrated back retainer is attached to the end of the connector, the back retainer cannot be attached to the covered electric wire after connecting the covered electric wire and the terminal, and the work procedure is Will be restricted.

  For this reason, when the terminal connected to the end of the covered electric wire is accommodated in the connector after the end of the covered electric wire is inserted into the back retainer, the back retainer is attached to the end of the connector. In this case, however, the back retainer hinders work in the connection between the covered electric wire and the terminal.

  On the other hand, when the above-mentioned connector divides the back retainer into a plurality of divided retainers and attaches them to the end of the wire lead-out portion, the covered electric wire in the wire lead-out portion is held by the concave portion of each split retainer, Since the concave portion is in close contact with the outer peripheral surface of the covered electric wire in the longitudinal direction, an external force applied to the crimped portion or the contact portion of the terminal can be reliably suppressed.

Moreover, the back retainer can be attached to the wire lead-out portion of the connector even after the covered wire and the terminal are connected and the covered wire and the terminal are accommodated in the connector.
Furthermore, when the back retainer is moved to an appropriate mounting position, the contact resistance when moving in a plurality of divided retainers is smaller than the contact resistance when moving the integrated back retainer. It can be easily mounted at the mounting position.
As a result, the external force applied to the crimping portion and the contact portion of the terminal can be reliably suppressed, and the assembly workability in the connector can be further improved.

In one embodiment of the present invention, the facing surface that face each other of the plurality of divided retainers, it can be characterized in that the retainer engagement means for engaging the respective split retainer together is provided.
Here, the retainer engaging means can be constituted by, for example, a concave portion, a convex portion, a locking claw, a locking hole, or a stopper that integrally fixes the divided retainer.

According to this invention, the covered electric wire can be more reliably held by the back retainer.
Specifically, when the above-described back retainer is divided into a plurality of divided retainers and attached to the end of the wire lead-out portion, the covered electric wire in the wire lead-out portion is held by the plurality of split retainers and is retained by the retainer engaging means. The opposing surfaces of each split retainer are engaged with each other.

  As a result, the covered electric wire can be more reliably held without causing a shift in the opposing surfaces of the divided retainers, and the effect of regulating and suppressing the external force by the back retainer can be further enhanced.

In one embodiment of the present invention, the in the mounting portion and the back retainer and the wire draw-out portion is Ru are mounted to each other, the one that locked portion to the back retainer Ru provided, the locked portion in the wire draw-out portion It can be characterized in that a locking portion for locking is provided.
Here, the said to-be-latched part and the latching | locking part can be comprised by a recessed part, a convex part, a latching claw, a latching hole, etc., for example.

According to this invention, the external force applied to the covered electric wire by the back retainer can be more reliably regulated.
Specifically, when the back retainer is attached to the end of the wire lead-out portion, the back retainer is locked to the locking portion of the wire lead-out portion, and the back retainer is attached to the end of the wire lead-out portion. And fix.

As a result, even if an external force such as vibration or bending is applied to the covered electric wire, there is no backlash between the back retainer and the housing. For this reason, the holding position of the covered electric wire by the back retainer, that is, the relative position between the covered electric wire and the terminal and the housing is difficult to be displaced, so that the external force applied to the crimping portion and the contact portion of the terminal is more reliably suppressed. be able to.
As a result, the effect of regulating and suppressing external force by the back retainer can be stably obtained.

The connector unit of the present invention is
A power source side connector configured in the connector, the power supply side connector and the device-side connector to be connected is provided with the power supply side connector is configured by one of the female connector or male connector, the device-side connector but with the arrangement in the other of the female connector or male connector, the power supply side connector and the device-side connector is characterized in that it is electrically connected.

  According to the present invention, in the connected state as described above, the external force applied to the covered electric wire led out to the outside of the connector and the terminal accommodated in the connector is reliably ensured by the back retainer attached to one connector. Since it suppresses, electric power can be supplied more stably and reliability can be improved.

  According to the present invention, a connector and a connector unit that can reliably prevent the occurrence of poor connection by reliably suppressing the external force applied to the covered electric wire led out of the connector and the terminals accommodated in the connector. Can be provided.

The perspective view of the shield connector in this Embodiment 1. FIG. Sectional drawing of the shield connector parted by the terminal part. Sectional drawing of the shield connector parted in the width direction center part. The perspective view of a power supply side connector. The disassembled perspective view of a power supply side connector. AA arrow sectional drawing of the power supply side connector shown in FIG. The a section expanded sectional view shown in FIG. Explanatory drawing of a back retainer. Explanatory drawing of the split retainer which isolate | separated the back retainer. The perspective view of an apparatus side connector. The disassembled perspective view of an apparatus side connector. The rear view which looked at the back retainer of Embodiment 2 from the back side. The front view which looked at the back retainer of Embodiment 3 from the front side. Sectional drawing of the connector parted by the terminal part of the prior art example.

An embodiment of the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
1 is a perspective view of the shield connector 10 according to the first embodiment, FIG. 2 is a cross-sectional view of the shield connector 10 divided at the terminal portion, FIG. 3 is a cross-sectional view of the shield connector 10 divided at the center portion in the width direction, and FIG. FIG. 5 is an exploded perspective view of the power supply side connector 20, FIG. 6 is a cross-sectional view of the power supply side connector 20 shown in FIG. 4 taken along the line AA, and FIG. It is sectional drawing.

  In the present embodiment, a shielded connector including a power supply side connector 20 connected to a power supply side such as a battery (not shown) and a device side connector 50 connected to a device side such as an inverter fitted to the power supply side connector 20. 10 (see FIGS. 1 to 3).

  The power supply side connector 20 has two female terminals 22 to which the covered electric wires 21 are connected, a synthetic resin power supply side housing 23 in which the female terminals 22 are accommodated, a size that covers the power supply side housing 23, and The shield shell 24 made of aluminum die cast formed in a shape and a synthetic resin back retainer 25 mounted on the rear end side of the power supply side housing 23 are configured (see FIGS. 4 to 6).

The female terminal 22 includes a box portion 22a formed in a substantially square shape when viewed from the front side in the longitudinal direction X, and a crimping portion 22b provided continuously on the rear side of the box portion 22a.
An elastic contact piece 22c that contacts the male terminal 51 of the device-side connector 50 is disposed in the front side of the box portion 22a so as to face each other in the height direction Z. A locking hole 22d that is locked inside the power supply side housing 23 is provided at the upper rear side of the box portion 22a.
The crimping part 22 b is crimped to the distal end portion of the covered electric wire 21 and is electrically connected to a conductor (not shown) exposed on the distal end side of the covered electric wire 21.

A synthetic rubber wire seal 211 formed in a substantially round shape when viewed from the front side is attached to the outer peripheral surface of the insulating coating covering a conductor (not shown) of the covered electric wire 21.
In a state where the female terminal 22 is inserted into the terminal accommodating chamber 27 of the power supply side housing 23, the wire seal 211 is in close contact with the rear end side inner peripheral surface of the power supply side housing 23 in a water-stopped state.

The above-described longitudinal direction X is a direction that coincides with the longitudinal direction X in the shield connector 10 that connects the power-side connector 20 to the device-side connector 50, and the width direction Y is the direction in which the covered electric wires 21 and 21 are arranged. And the direction is orthogonal to the longitudinal direction X. Moreover, the height direction Z described later is a direction orthogonal to the longitudinal direction X and the width direction Y.
Further, the device side connector 50 side with respect to the power source side connector 20 is defined as the front (upper right in FIG. 1), and conversely, the power source side connector 20 side with respect to the device side connector 50 is defined as the rear (lower left in FIG. 1).

  The power supply side housing 23 includes a pair of terminal accommodating portions 26 that form a substantially rectangular shape extending toward the front side in the longitudinal direction X, and a terminal accommodating chamber that accommodates a female terminal 22 formed inside the terminal accommodating portion 26. 27 and a pair of wire lead-out portions 28 having a substantially cylindrical shape extending toward the rear side in the longitudinal direction X (see FIGS. 2, 5, and 6).

  On the front end side of the power supply side housing 23, a concave fitting portion 23a into which the cylindrical fitting portion 52a of the device side housing 52 is inserted is formed. A substantially rectangular terminal accommodating portion 26 protrudes toward the front side and is arranged in parallel at a predetermined interval in the width direction Y at the inner center of the concave fitting portion 23a.

At the center of the rear part of the concave fitting part 23a, a substantially cylindrical wire lead-out part 28 communicates with the terminal accommodating chamber 27 and protrudes toward the rear side, and has a width corresponding to the terminal accommodating part 26. They are arranged in parallel in the direction Y at a predetermined interval.
On the outer peripheral surface on the front end side of the wire lead-out portion 28, locking protrusions 28a to which locking protrusions 254 of elastic locking pieces 253 in the back retainer 25 described later are locked are formed at predetermined intervals in the circumferential direction. (See FIGS. 5 and 6).

A synthetic rubber first housing seal 29 formed in a substantially rectangular shape as viewed from the front side is attached to the outer peripheral surface of the terminal accommodating portion 26 on the rear end side.
The first housing seal 29 is held in a seal holding groove 23 c formed on the outer peripheral surface of the terminal receiving portion 26 on the rear end side, and the device side of the device side connector 50 is connected to the device side connector 50 when the power supply side connector 20 is connected to the device side connector 50. It is closely attached to the inner peripheral surface of the housing 52 in a water-stopped state (see FIGS. 2 and 3).

  Inside the terminal accommodating chamber 27, a lance portion 27 a that is locked to the locking hole 22 d of the box portion 22 a of the female terminal 22 is formed. At the front end of the terminal accommodating chamber 27, an insertion hole 27 b into which the contact piece 51 a of the male terminal 51 in the device-side connector 50 is inserted from the front side when the power-side connector 20 is connected to the device-side connector 50 is opened. (See FIGS. 2 and 6).

A synthetic rubber second housing seal 30 formed in a substantially rectangular shape when viewed from the front side is attached to the outer peripheral surface of the power supply side housing 23 on the terminal accommodating portion 26 side.
The second housing seal 30 is held in a seal holding groove 23 d formed on the outer peripheral surface of the power supply side housing 23, and in the state where the power supply side housing 23 is accommodated in the shield shell 24, the inside of the front side fitting portion 24 a in the shield shell 24. Close contact with the peripheral surface in a water-stopped state.

A pair of elastic locking pieces 31 extending toward the rear side in the longitudinal direction X are formed on the outer periphery of the central portion in the longitudinal direction X of the power supply side housing 23 along the connecting portions 28b that connect the wire lead-out portions 28 to each other. (See FIG. 5).
The elastic locking piece 31 has flexibility, and a locking projection 31a that is locked to the locking recess 24c of the shield shell 24 protrudes outward from the distal end of the elastic locking piece 31 (FIG. 3). FIG. 7).

  The shield shell 24 has a substantially oval shape that is horizontally long in the width direction Y opened in the longitudinal direction X, and a front-side fitting that fits the front outer surface portion of the power-side housing 23 on the front end side of the shield shell 24. A portion 24a is formed. On the rear end side of the shield shell 24, a rear fitting portion 24b for fitting the rear outer surface portion of the power supply side housing 23 is formed (see FIGS. 2 to 6).

  In the state where the power supply side housing 23 is accommodated in the shield shell 24, the locking projection 31 a of the elastic locking piece 31 is locked to the rear end side edge portion of the shield shell 24 in the center portion in the width direction Y. A pair of locking recesses 24c are formed (see FIGS. 3, 5, and 7).

A support portion 33 projecting in the radial direction is formed at one side edge portion of the front end side of the shield shell 24. An insertion hole 34 through which the fastening bolt 35 is inserted is formed in the support portion 33.
The tightening bolt 35 is inserted into the insertion hole 34 from the rear side, and is secured by a retaining ring 37 attached to a protruding portion on the front side of the insertion hole 34. A bolt cap 38 for covering the bolt head is attached to the bolt head of the tightening bolt 35 (see FIGS. 3 and 5).

The configuration of the back retainer 25 attached to the rear end side of the power source housing 23 will be described.
8A and 8B are explanatory views of the back retainer 25. Specifically, FIG. 8A is a perspective view of the back retainer 25, and FIG. 8B is a front view of the back retainer 25 as viewed from the front side.

  FIG. 9 is an explanatory view of the split retainer 251 with the back retainer 25 separated. Specifically, FIG. 9A is a perspective view of the split retainer 251 separated in the height direction Z, and FIG. It is the perspective view which looked at the division retainer 251 from the front side diagonally upward.

The back retainer 25 is composed of a pair of split retainers 251 and 251 formed in the same shape and mounted on the rear end side of the power supply side housing 23, and includes a split holding portion 251a and a holding recess 251b, which will be described later. Yes.
On the front side of the back retainer 25, two electric wire holding portions 25a for holding the covered electric wire 21 led out in the electric wire lead-out portion 28 are arranged in parallel in the width direction Y in a state where one split retainer 251, 251 is combined. It protrudes.

  The electric wire holding portion 25 a is formed in a substantially cylindrical shape whose axial direction extends toward the front side in the longitudinal direction X of the covered electric wire 21. An electric wire holding hole 25b having a substantially circular cross section is formed in the central portion in the radial direction of the electric wire holding portion 25a so that the outer peripheral surface of the covered electric wire 21 is in close contact with the longitudinal direction X. (See FIG. 6).

The electric wire holding portion 25 a is allowed to be inserted from the rear side between the inner peripheral surface of the electric wire outlet portion 28 in the power supply side housing 23 and the outer peripheral surface of the covered electric wire 21 led into the electric wire outlet portion 28. It is formed in size, shape, and thickness.
The length L in the longitudinal direction X of the electric wire holding portion 25a is set to a length corresponding to the diameter D of the covered electric wire 21 (see FIG. 6).
The electric wire holding hole 25 b is formed to have a hole diameter corresponding to the diameter D of the covered electric wire 21, and is set to a length that is in close contact with the outer peripheral surface of the covered electric wire 21 with a predetermined width in the longitudinal direction X.

The split retainer 251 divides the back retainer 25 into two lines with respect to the height direction Z in a size and shape that are symmetrical with respect to a horizontal virtual dividing line V1 passing through the hole center point P of the wire holding hole 25b. Is configured.
The electric wire holding part 25a and the electric wire holding hole 25b are also divided into two in a size and shape that are line-symmetric as in the case of the above and the divided retainer 251.

The substantially semicircular holding recesses 251b formed by dividing the wire holding holes 25b are formed at a predetermined interval in the width direction Y of the split retainer 251.
The substantially semicircular divided holding portion 251a obtained by dividing the electric wire holding portion 25a corresponds to the outer peripheral surface of the covered electric wire 21 so that a cross-sectional shape cut by a plane perpendicular to the longitudinal direction X has a substantially arc shape. Is formed.

  Elastic locking pieces 253 extending toward the front side in the longitudinal direction X are formed on both side edges of the split retainer 251 in parallel with the longitudinal direction X. Elastic support pieces 255 extending toward the front side in the longitudinal direction X are formed on both sides of the elastic locking pieces 253 in parallel with the elastic locking pieces 253.

A locking protrusion 254 that is locked to the locking protrusion 28 a of the wire lead-out portion 28 in the state where the back retainer 25 is mounted on the rear end side of the power supply side housing 23 is formed at the front end portion of the elastic locking piece 253. ing.
The inner peripheral surface of the elastic locking piece 253 and the elastic support piece 255 facing the outer peripheral surface of the wire lead-out portion 28 is formed into a smooth curved surface corresponding to the outer peripheral surface of the wire lead-out portion 28 (FIG. 5). , FIG. 6, FIG. 8, FIG. 9).

An erroneous release preventing portion 256 that is inserted from the rear side with respect to the locking recess 24c of the shield shell 24 is formed at the central edge of the split retainer 251 in the width direction Y opposite to the split holding portion 251a ( (See FIGS. 3, 4, and 5).
The erroneous release preventing portion 256 is an elastic locking piece that is locked to the locking recess 24c with respect to the locking recess 24c of the shield shell 24 in a state where the back retainer 25 is mounted on the rear end side of the power supply side housing 23. 31 is inserted outside the locking protrusion 31a, and is formed in a size and shape that covers the locking portion between the locking recess 24c and the locking protrusion 31a from the outside.

  Further, the width direction Y of the erroneous release preventing portion 256 is narrower than the lateral width of the locking recess 24c, and is formed in a wide shape so that the locking portion between the locking recess 24c and the locking projection 31a is covered. Yes. And it is formed so as to avoid contact with the locking projection 31a locked in the locking recess 24c (see FIG. 7).

Next, the structure of the apparatus side connector 50 which connects the above-mentioned power supply side connector 20 is demonstrated.
FIG. 10 is a perspective view of the device-side connector 50, and FIG. 11 is an exploded perspective view of the device-side connector 50.

  The device-side connector 50 includes two male terminals 51 made of conductive plate-shaped bus bars, a device-side housing 52 made of synthetic resin in which two male terminals 51 are inserted in parallel, and a male connector. Corresponding to the terminal 51, it is composed of two connection nuts 53 housed inside the front end side of the device side housing 52, and a cover 54 fitted into the front end side opening of the device side housing 52 (FIG. 10). FIG. 11).

  The male terminal 51 includes a contact piece 51a formed wide as viewed from the rear side in the longitudinal direction X, and a connection part 51b formed by bending the front end side of the contact piece 51a upward at a right angle. The power supply side connector 20 is arranged in parallel corresponding to the female terminal 22.

  The device-side housing 52 has a substantially oval shape that is horizontally long in the width direction Y that is open in the longitudinal direction X. The device-side housing 52 is horizontally long in the width direction Y when viewed from the rear side. A substantially rectangular tubular fitting portion 52a is formed. On the front end side of the device-side housing 52, a nut housing portion 52b in which two connection nuts 53 are housed in parallel is formed.

  The outer surface side of the cylindrical fitting portion 52 a is formed in a size and shape that allows insertion into the concave fitting portion 23 a of the power supply side housing 23. The inner surface side of the cylindrical fitting portion 52a is formed in a size and shape into which the terminal accommodating portion 26 protruding from the concave fitting portion 23a is inserted in parallel. Inside the cylindrical fitting portion 52a, a contact piece 51a of the male terminal 51 protrudes a predetermined length toward the rear side.

  The contact piece 51a of the male terminal 51 protrudes by a length inserted between the elastic contact pieces 22c and 22c of the female terminal 22 in the power supply side housing 23 in a state where the power supply side housing 23 is connected to the device side housing 52. Yes.

A nut housing chamber 52c in which the connection nut 53 is housed is formed in parallel inside the nut housing portion 52b corresponding to the male terminal 51 inserted in parallel.
The connection nut 53 is formed in a substantially cross shape when viewed from the rear side, and is accommodated in the nut housing chamber 52c with the cross side of the connection nut 53 facing the rear side.
The connection portion 51b of the male terminal 51 is in contact with the connection nut 53 housed in the nut housing chamber 52c and is exposed in the front end side of the nut housing chamber 52c.

  The cover 54 is formed in such a size and shape that the upper surface side opening portion of the nut housing portion 52b is closed, and in the state where the connection nut 53 is housed in the nut housing chamber 52c, the cover 54 is formed on the upper surface side opening portion of the nut housing portion 52b. It is attached to.

A synthetic rubber device side seal 57 formed in a substantially elliptical shape when viewed from the front side is mounted on the outer peripheral surface of the device side housing 52 near the nut housing portion 52b.
The device-side seal 57 is held in a seal holding groove 52d formed on the outer peripheral surface closer to the nut housing portion 52b side than the center portion in the longitudinal direction X of the device-side housing 52, and the device-side connector 50 is not shown on the device side. In the state inserted in the fitting part, it is closely_contact | adhered to a water stop state with respect to the internal peripheral surface of this apparatus side fitting part.

A flange portion 521 that is fitted to the front end side opening of the shield shell 24 is formed on the outer peripheral surface of the central portion in the longitudinal direction X of the device-side housing 52.
A support portion 522 protruding in the radial direction is formed on one side edge of the flange portion 521. A metal collar 524 into which a fixing bolt (not shown) is inserted is press-fitted into the insertion hole 523 formed in the support portion 522.

  When the above-described device-side connector 50 is fixed to the device-side mounting portion 60, when the front end side of the device-side connector 50 is inserted into the mounting hole 61 formed in the device-side mounting portion 60, a fixing bolt (not shown) is attached to the flange portion. The device-side connector 50 is fixed to the device-side mounting portion 60 by being screwed into the device-side mounting portion 60 via the collar 524 of 521.

Next, a procedure for assembling the power supply side connector 20 in the first embodiment will be described.
First, the power supply side housing 23 of the power supply side connector 20 is held in such a direction that the wire lead-out portion 28 side is the rear side, and is inserted into the shield shell 24 from the front side, and is attached to the power supply side housing 23. The housing seal 30 is brought into close contact with the inner peripheral surface of the shield shell 24 and sealed in a water-stopped state.

  When the power supply side housing 23 is covered with the shield shell 24, the elastic locking piece 31 in the power supply side housing 23 is elastically deformed so that the locking projection 31 a of the elastic locking piece 31 becomes the locking recess 24 c of the shield shell 24. Lock. As a result, the power supply side housing 23 is secured to the shield shell 24 (see FIGS. 5 and 6).

  Next, the female terminal 22 to which the covered wire 21 is connected is inserted into the terminal accommodating chamber 27 of the power supply side housing 23 from the rear side, and the locking hole 22d of the box portion 22a is inserted into the lance portion of the terminal accommodating chamber 27. The female terminal 22 is fixed to a normal position in the terminal accommodating chamber 27 by being engaged with the terminal 27a.

  The covered wire 21 connected to the female terminal 22 is led out from the wire lead-out portion 28 of the power supply side housing 23, and the wire seal 211 previously attached to the covered wire 21 is connected to the wire lead-out portion 28 from the rear side. At the same time, the wire seal 211 is brought into close contact with the inner peripheral surface of the wire lead-out portion 28 and sealed in a water-stopped state.

  Next, the split retainers 251 and 251 of the back retainer 25 are respectively attached to the outer peripheral surface of the covered electric wire 21 so as to sandwich the covered electric wire 21 led out into the electric wire lead-out portion 28, and the divided retainers 251 and 251 The opposing surfaces are in contact with each other and combined together.

  The inner peripheral surface of the electric wire holding hole 25 b of the electric wire holding portion 25 a in the back retainer 25 is brought into close contact with the outer peripheral surface of the covered electric wire 21 in the longitudinal direction X. Specifically, by covering the inner peripheral surface of the holding recess 251b of the divided holding portion 251a with a predetermined width in the longitudinal direction X with respect to the outer peripheral surface of the covered electric wire 21, the covered electric wire 21 led out into the electric wire outlet portion 28 is The split retainer 251 holds the split retainer 251.

  At that time, the tip of the split holding portion 251 a of the split retainer 251 is pressed against the wire seal 211 pushed into the wire lead-out portion 28 from the rear side, and the wire seal 211 is pushed into a normal position in the wire lead-out portion 28.

  When the back retainer 25 formed by combining the divided retainers 251 and 251 is brought into contact with the rear end of the wire lead-out portion 28 in the power supply side housing 23, the elastic locking piece 253 in the divided retainer 251 is elastically deformed to The locking protrusion 254 of the stop piece 253 is locked to the locking protrusion 28 a of the wire lead-out portion 28.

  Even if an external force such as vibration or bending is applied to the covered wire 21, there is no backlash between the back retainer 25 and the power supply side housing 23, and the position where the covered wire 21 is held by the back retainer 25, that is, Since the relative position between the covered wire 21 and the female terminal 22 and the power supply side housing 23 is not easily displaced, the external force applied to the crimping portion 22b and the elastic contact piece 22c of the female terminal 22 is more reliably suppressed. Can do.

  Further, the erroneous release preventing portion 256 of the split retainer 251 is inserted outside the locking projection 31a of the elastic locking piece 31 locked to the locking recess 24c of the shield shell 24, and locked to the locking recess 24c. The locking protrusion 31a thus formed is covered from the outside (see FIGS. 3 and 6).

Thereby, for example, a tool or the like can be prevented from accessing the locking projection 31a of the elastic locking piece 31 in the power supply side housing 23 locked in the locking recess 24c of the shield shell 24.
As a result, for example, the locking projection 31a and the locking recess 24c can be prevented from being erroneously locked by the access of the tool, that is, the fixing of the power supply side housing 23 and the shield shell 24 is released. it can.

  When assembling the power supply side connector 20 as described above, the inner peripheral surface of the electric wire holding hole 25b of the electric wire holding portion 25a in the back retainer 25 is in close contact with the outer peripheral surface of the covered electric wire 21 over a predetermined width in the longitudinal direction X. By doing so, the covered wire 21 led out in the wire lead-out portion 28 of the power supply side housing 23 can be held.

  For example, the external force applied to the covered electric wire 21 is regulated by the back retainer 25 even if the covered electric wire 21 led out of the power supply side connector 20 vibrates or bends due to running vibration generated when the electric vehicle runs. Thus, it is possible to prevent external force from being transmitted to the female terminal 22 accommodated in the terminal accommodating chamber 27 of the power supply side housing 23.

For this reason, the elastic contact of the crimping part 22b which crimp-connected the covered electric wire 21 in the female terminal 22 accommodated in the terminal accommodating chamber 27 of the power supply side housing 23, and the female terminal 22 to which the contact piece 51a of the male terminal 51 connects. The external force applied to the piece 22c can be reliably suppressed.
As a result, it is possible to prevent a connection failure from occurring in the female terminal 22 and to stably supply predetermined power.

  Furthermore, since the back retainer 25 is divided into the split retainers 251 and 251 and attached to the wire lead-out portion 28 in the power source side housing 23, the back retainer 25 is attached to the outer peripheral surface of the covered wire 21 before the female terminal 22 is connected. There is no need to wear it in advance.

  Thereby, for example, the back retainer is connected even after the covered electric wire 21 and the female terminal 22 are connected and the covered electric wire 21 to which the female terminal 22 is connected is accommodated in the terminal accommodating chamber 27 of the power source side housing 23. 25 can be attached to the electric wire outlet portion 28 of the power source side housing 23.

  As a result, workability when the back retainer 25 is mounted is improved, and a predetermined portion of the covered electric wire 21 led out into the electric wire lead-out portion 28 by the back retainer 25 can be reliably held.

Furthermore, the contact resistance when the divided retainers 251 and 251 are moved separately is smaller than the contact resistance when the divided retainers 251 and 251 are combined and moved to an appropriate mounting position, and the back retainer 25 is covered. The electric wire 21 can be easily attached to an appropriate attachment position in the longitudinal direction X.
As a result, the external force applied to the crimping portion 22b and the elastic contact piece 22c of the female terminal 22 can be reliably suppressed, and the assembly workability in the power supply side connector 20 can be further improved.

Next, a procedure for connecting the power supply side connector 20 to the device side connector 50 fixed to the device side mounting portion 60 will be described (see FIG. 2).
First, the power supply side connector 20 is held in a direction in which the concave fitting portion 23 a side is the front side, and the concave fitting portion 23 a of the power supply side housing 23 is fixed to the cylindrical fitting portion 52 a of the device side housing 52. The terminal accommodating portions 26 and 26 of the power supply side connector 20 are inserted into the cylindrical fitting portion 52 a of the device side housing 52 in the device side connector 50 by fitting from the rear side.

  The contact piece 51a of the male terminal 51 protruding from the cylindrical fitting portion 52a can be inserted between the elastic contact pieces 22c and 22c of the female terminal 22 accommodated in the terminal accommodation chamber 27 of the terminal accommodation portion 26 to allow energization. (See FIGS. 2 and 3).

When the power supply side connector 20 is connected to the device side connector 50, the tightening bolt 35 is inserted into the insertion hole 34 of the support portion 33 in the shield shell 24, and the tightening bolt 35 is inserted into the screwing hole 62 of the device side mounting portion 60. Threaded onto.
Thereby, the power supply side connector 20 and the equipment side connector 50 can be fixed in a properly fitted state, and a high voltage is supplied from the power supply side to the equipment side via the power supply side connector 20 and the equipment side connector 50. Can be stably supplied.

(Embodiment 2)
In the above-described first embodiment, the example in which the opposing surfaces of the divided retainers 251 constituting the back retainer 25 are brought into contact with each other and attached to the rear end side of the power supply side housing 23 has been described, but the divided retainers 251 illustrated in FIG. The back retainer 25 according to the second embodiment will be described in which the opposite surfaces are engaged with each other and mounted on the rear end side of the power supply side housing 23.

In the back retainer 25 of the second embodiment, a concave portion 252a and a convex portion 252b that are engaged with each other are formed on opposing surfaces of the divided retainers 251, respectively.
When the above-described back retainer 25 is mounted on the rear end side of the power supply side housing 23, the inner circumferential surface of the holding recess 251 b of the split holding portion 251 a in the split retainer 251 is set in the longitudinal direction X with respect to the outer peripheral surface of the covered electric wire 21. The covered electric wire 21 led out into the electric wire lead-out portion 28 is held by the split holding portion 251a of the split retainer 251. And the recessed part 252a and the convex part 252b which were formed in the opposing surface of the division | segmentation retainer 251 mutually engage.

Thereby, even if an external force such as vibration or bending is applied to the covered electric wire 21, the opposed surfaces of the divided retainers 251 are not easily displaced, and the covered electric wire 21 can be held more reliably.
As a result, the effect of regulating and suppressing the external force applied to the crimping part 22b and the elastic contact piece 22c of the female terminal 22 can be further enhanced, and the same effects and effects as those of the first embodiment can be achieved. be able to.

(Embodiment 3)
In the first and second embodiments, the example in which the back retainer 25 is divided into the two divided retainers 251 and 251 has been described. However, the central divided retainer 251C, the left divided retainer 251L, and the right divided retainer shown in FIG. The back retainer 25 of Embodiment 3 divided into 251R will be described.

  The back retainer 25 of the third embodiment is divided by a virtual dividing line V2 extending in the height direction Z through the hole center point P of the electric wire holding hole 25b, and a central dividing retainer 251C provided with an erroneous release preventing portion 256, The left divided retainer 251L provided with the elastic locking piece 253 and the right divided retainer 251R are divided into three in the width direction Y.

Similarly to the above-described second embodiment, the opposing surfaces facing the width direction Y in the split retainers 251C, 251R, and 251L are respectively formed with concave portions 252a and convex portions 252b that engage with each other.
The convex portions 252b are formed at both ends in the height direction Z of the holding concave portion 251b in the divided retainer 251C. The recesses 252a are formed at both ends in the height direction Z of the holding recesses 251b in the split retainers 251R and 251L.

  When the back retainer 25 of the third embodiment is mounted on the rear end side of the power supply side housing 23, the split retainer 251 </ b> C is inserted between the covered wires 21 and 21 led out into the wire lead-out portion 28, 21 is attached to the outer peripheral surface facing the width direction Y from the inside.

  The split retainer 251L is mounted on the outer peripheral surface of the left covered electric wire 21 as viewed from the front side, and the split retainer 251R is mounted on the outer peripheral surface of the right covered electric wire 21 as viewed from the front side.

  The inner circumferential surface of the holding recess 251b of the divided holding portion 251a in the divided retainers 251C, 251R, and 251L is led into the electric wire outlet portion 28 by closely contacting the outer peripheral surface of the covered electric wire 21 with a predetermined width in the longitudinal direction X. The covered electric wire 21 is held by the divided holding portions 251a of the divided retainers 251C, 251R, and 251L. And the recessed part 252a and the convex part 252b which were formed in the opposing surface of division | segmentation retainer 251C, 251R, 251L mutually engage.

Thereby, even if an external force such as vibration or bending is applied to the covered electric wire 21, the opposed surfaces of the divided retainers 251 are not easily displaced, and the covered electric wire 21 can be held more reliably.
As a result, the effect of regulating and suppressing the external force applied to the crimping part 22b and the elastic contact piece 22c of the female terminal 22 can be further enhanced, and the same effects and effects as those of the first embodiment can be achieved. be able to.
The concave portion 252a may be formed in the divided retainers 251R and 251L, and the convex portion 252b may be formed in the divided retainer 251C.

In the correspondence between the configuration of the present invention and the embodiment,
The connector of the present invention corresponds to the power supply side connector 20 of the embodiment,
Similarly,
The connector unit corresponds to the shield connector 10,
The housing corresponds to the power supply side housing 23,
The locking portion of the housing corresponds to the locking recess 24c of the power supply side housing 23,
The terminal corresponds to the female terminal 22,
The recesses of the split retainer correspond to the holding recesses 251b of the split retainers 251, 251C, 251R, 251L,
The retainer engaging means corresponds to the concave portion 252a and the convex portion 252b,
The locking portion corresponds to the locking projection 28a,
The locked portion corresponds to the locking protrusion 254,
The present invention is not limited to the configuration of the above-described embodiment, but can be applied based on the technical idea shown in the claims, and many embodiments can be obtained.

In the embodiment, if the external force applied to the female terminal 21 can be regulated, for example, the length L of the wire holding portion 25a is set to a diameter D or less or a length D or more. For example, when the diameter D of the covered electric wire 21 is 5 mm, the length L of the electric wire holding portion 25a may be set to 10 mm.
Further, in order to further strengthen the suppression of the external force, it is preferable to set the length L of the electric wire holding portion 25 a longer than the diameter D of the covered electric wire 21.

  In the first to third embodiments, the example in which the electric wire holding portion 25a of the back retainer 25 protrudes greatly toward the front side in the longitudinal direction X has been described. For example, the electric wire holding portion 25a protrudes greatly toward the rear side in the longitudinal direction X. Or you may protrude largely in both the front side and the back side.

As other engaging means in place of the concave portion 252a and the convex portion 252b of the third embodiment, for example, a protrusion and a hole, or a locking pin, a locking hole, and the like may be used.
Further, the divided retainers 251 and 251 and the divided retainers 251C, 251R, and 251L may be integrally fixed using a stopper (not shown).

X ... Longitudinal direction Y ... Width direction Z ... Height direction 10 ... Shield connector 20 ... Power supply side connector 21 ... Covered electric wire 22 ... Female terminal 23 ... Power supply side housing 24 ... Shield shell 24c ... Locking recess 25 ... Back retainer 251 , 251C, 251R, 251L ... split retainer 25a ... electric wire holding portion 251a ... divided holding portion 25b ... electric wire holding hole 251b ... holding recess 253 ... elastic locking piece 254 ... locking protrusion 256 ... false release preventing portion 26 ... terminal accommodating portion DESCRIPTION OF SYMBOLS 27 ... Terminal accommodation chamber 28 ... Wire lead-out part 28a ... Locking protrusion 31 ... Elastic locking piece 31a ... Locking protrusion 50 ... Equipment side connector 51 ... Male terminal 52 ... Equipment side housing 52a ... Cylindrical fitting part

Claims (5)

A housing having a terminal accommodating chamber for accommodating a terminal, and a wire draw-out portion for deriving a covered electric wire formed in the housing and connected to the terminal to the outside, and a back retainer is mounted on an end portion of the electric wire lead-out portion a connector which is provided,
In the back retainer,
Wire holding portion is provided for holding the covered wires in the wire draw-out portion,
Electric wire holding portion is formed in a substantially cylindrical shape whose axial direction extends in the longitudinal direction of the covered electric wire, electric wire holding hole in which the covered wire is inserted in a state that the outer peripheral surface of the covered wire was adhered longitudinally As well as
A substantially cylindrical shield shell covering the housing is provided,
On the outer periphery of the end portion of the housing corresponding to the back retainer, a locking projection that protrudes toward the outside of the housing is provided,
On the outer periphery of the end portion of the shield shell corresponding to the back retainer, there is provided a locking portion for locking the locking projection of the housing,
At the edge of the back retainer corresponding to the locking projection,
A connector provided with an erroneous release preventing portion that covers a locking portion between the locking protrusion and the locking portion from the outside . The back retainer, formed of a plurality of split retainers,
Wherein each split retainer connector of claim 1 provided with recesses which can be brought into close contact with the longitudinal direction with respect to the outer circumferential surface of the covered electric wire. On the opposed surfaces of the plurality of divided retainers,
The connector according to claim 1 or 2 retainer engagement means for engaging the respective split retainer together is provided. In the mounting portion for mounting the back retainer and the wire lead-out portion to each other,
The one that locked portion is Ru provided in the back retainer, connector as claimed in claim 1, the locking portion for locking the locked portion in the wire draw-out portion is provided. A power source side connector configured in the connector according to any one of claims 1-4, the device connector and is provided to connect the power supply connector,
The power supply side connector is configured with either a female connector or a male connector,
The device-side connector is constituted by the other of the female connector or the male connector,
A connector unit in which the power supply side connector and the device side connector are electrically connected.

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