JP2018133278A - Charging inlet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute waterproof from the back side of a charging inlet by using a rubber plug.SOLUTION: A charging inlet 10 includes a terminal 30 having a terminal body 34, provided with a flange 35 on the outer peripheral surface thereof, and provided with a wire connection 37 to be connected with a wire W in the rear of the flange 35, a housing 20 having a cylindrical terminal housing part 25 internally housing the terminal body 34, and provided with an abutting part 26 on which the flange 35 abuts from the rear on the inner peripheral surface of the terminal housing part 25, a retainer 40 having a cylindrical anti-falling-out part 41 abutting on the flange 35 from the rear, and housing the wire connection 37 in the anti-falling-out part 41, a rubber plug 60 adhering to the outer peripheral surface of the wire W pulled out from the wire connection 37 and the inner peripheral surface of the anti-falling-out part 41, and a rear holder 70 having a wire holding part for holding the wire W, and on which the wire holding part abuts to the rubber plug 60 from the rear.SELECTED DRAWING: Figure 7

Description

  The technology disclosed by this specification is related with a charge inlet.

  Conventionally, as a connector with a grommet mounted on a vehicle, for example, a connector described in Japanese Unexamined Patent Application Publication No. 2015-216090 (Patent Document 1 below) is known. This grommet-equipped connector is configured such that a plurality of electric wires drawn out rearward of the housing are bundled and held at one place by a tie band. Thereby, when an electric wire is shaken, it can avoid that stress concentrates on the root of an electric wire. Moreover, the connector with a grommet is provided with the grommet which surrounds a some electric wire, and the damage to an electric wire is prevented by this grommet.

Japanese Patent Laid-Open No. 2015-216090

  However, the above grommet is provided only for the purpose of protecting the electric wire, and is not provided for the purpose of waterproofing from the back side. Although it is conceivable to use a rubber plug to enable waterproofing from the back side, a rubber plug retainer for preventing the rubber plug from being detached is necessary, and there is a concern that the number of parts increases. Further, considering the arrangement with existing parts such as a retainer for preventing the terminal from falling off and the above-mentioned grommet, it is not easy to add a rubber plug.

  The charging inlet disclosed in the present specification has a terminal body, a flange portion is provided on the outer peripheral surface of the terminal body, and a wire connection portion to which an electric wire is connected is provided behind the flange portion, and The terminal body has a cylindrical terminal accommodating portion accommodated therein, and a flange portion that abuts against the flange portion from the rear is provided on the inner peripheral surface of the terminal accommodating portion; and the flange portion A retainer having a tubular retaining portion that abuts from the rear, the wire connecting portion being housed inside the retaining portion, an outer peripheral surface of the wire drawn rearward from the wire connecting portion, and an inner portion of the retaining portion A rubber plug that is in close contact with the peripheral surface and a wire holder that holds the wire are provided, and the wire holder includes a rear holder that comes into contact with the rubber plug from behind.

  According to such a configuration, since the electric wire is held by the electric wire holding portion of the rear holder, it is possible to avoid stress concentration at the base of the electric wire. At the same time, since the rubber plug is prevented from being detached by the electric wire holding portion of the rear holder, it is not necessary to add a new part, and the rubber plug can be added in consideration of the arrangement of the existing parts. Therefore, the rear end opening of the retaining portion can be water-stopped by the rubber plug, and waterproofing from the back side is possible.

The charging inlet disclosed by this specification is good also as the following structures.
It is good also as a structure provided with the resin-made sleeve which is mounted | worn between the outer peripheral surface of the said electric wire connection part, and the inner peripheral surface of the said retaining part, and performs the front stop of the said rubber stopper.
According to such a configuration, the rubber plug can be prevented from being pushed into the retaining portion by the sleeve. In order to prevent the rubber plug from being pushed in, it can be dealt with by lengthening the rubber plug, but this is not a good idea because it increases the cost of parts for the rubber plug. Therefore, the rubber plug can be kept to a minimum size by adding a resin sleeve having a smaller component cost than the rubber plug.

The inner peripheral surface of the retaining portion is provided with an inner peripheral protrusion that protrudes toward the outer peripheral surface of the terminal body, and the sleeve is in contact with the inner peripheral protrusion from behind. Good.
According to such a configuration, the sleeve can be stopped in front by the inner circumferential protrusion.

A seal member fitted to the outer peripheral surface of the terminal main body may be provided between the flange portion and the inner peripheral protrusion, and the seal member may be in close contact with the inner peripheral surface of the retaining portion.
According to such a configuration, even when water enters the front end opening of the retaining portion so as to go around the retaining portion, the front end opening of the retaining portion can be stopped by the seal member.

  According to the charging inlet disclosed by this specification, waterproofing from the back side of a charging inlet can be performed using a rubber stopper.

Exploded perspective view showing components of charging inlet Charging inlet perspective view Front view of charging inlet Rear view of charging inlet AA line sectional view in FIG. BB sectional view in FIG. CC sectional view in FIG. DD sectional view in FIG. Retainer front view EE sectional view in FIG. Front view of rubber stopper Side view of rubber stopper Front view of sleeve Side view of sleeve

<Embodiment>
Embodiments will be described with reference to FIGS. 1 to 14. As shown in FIG. 1, the charging inlet 10 of the present embodiment includes a housing 20, a plurality of terminals 30, a retainer 40, a plurality of sleeves 50, a plurality of rubber plugs 60, and a rear holder 70. Has been.

  The housing 20 is made of a synthetic resin and has a fitting portion 21 into which the mating connector can be fitted. The fitting portion 21 is provided with a plurality of cavities 22 in which a plurality of terminals 30 are accommodated from behind. A cylindrical front hood portion 23 is provided around the fitting portion 21.

  Moreover, the housing 20 has a flat mounting portion 24 that is attached to a vehicle body (not shown). As shown in FIGS. 5 to 7, the fitting portion 21 and the front hood portion 23 are provided so as to penetrate the attachment portion 24 in the plate thickness direction. As shown in FIG. 3, each cavity 22 is formed inside a cylindrical terminal accommodating portion 25. A pair of adjacent terminal accommodating portions 25 are connected to each other.

  As shown in FIG. 1, the terminal 30 is a male terminal having a pin shape as a whole. The terminal 30 includes two power terminals 31 for power supply, one ground terminal 32 for grounding, and two signal terminals 33 for signals. The power terminal 31 and the ground terminal 32 are both large diameter terminals, and the signal terminal 33 is a small diameter terminal. 5 is a cross-sectional view of the ground terminal 32 cut vertically, FIG. 6 is a cross-sectional view of the signal terminal 33 cut vertically, and FIG. 7 is a cross-sectional view of the power terminal 31 cut vertically. Since each of the terminals 31, 32, and 33 has the same configuration, in the following, the structure will be described with the power terminal 31 as a representative, and description of the ground terminal 32 and the signal terminal 33 will be omitted.

  As shown in FIG. 7, the power terminal 31 is provided so as to protrude forward from a terminal body 34 having a columnar shape, a flange portion 35 provided around the outer peripheral surface of the terminal body 34, and a front end portion of the terminal body 34. Terminal connection portion 36 and a wire connection portion 37 provided to project rearward from the rear end portion of the terminal main body 34. The flange portion 35 is located at the front end of the terminal body 34. In addition, a resin cap 38 for preventing a finger is fixed to the front end portion of the terminal connection portion 36. The electric wire connection part 37 is made into the cylindrical shape opened rearward, and is electrically connected to the core wire by crimping in a state where the core wire of the electric wire W is accommodated inside the electric wire connection part 37.

  An abutting portion 26 is provided around the inner peripheral surface of the terminal accommodating portion 25. The abutting portion 26 is located in the central portion of the terminal accommodating portion 25 in the front-rear direction. Inside the abutting portion 26, a hole through which the terminal connecting portion 36 is inserted is provided penetrating in the front-rear direction. In addition, the front surface of the flange portion 35 can come into contact with the rear surface of the abutting portion 26 from the rear. Therefore, when the terminal connecting portion 36 is inserted into the hole of the abutting portion 26 from the rear side, the power terminal 31 is stopped in front by the front surface of the flange portion 35 coming into contact with the rear surface of the abutting portion 26, and the terminal connecting portion. 36 is accommodated in the cavity 22 in a posture protruding forward from the abutting portion 26.

  As shown in FIG. 1, the retainer 40 has a retainer body 42 provided with a plurality of cylindrical retaining portions 41 protruding forward, and a cylindrical shape so as to surround the plurality of retaining portions 41. And a plurality of mounting pieces 45 provided so as to protrude forward from the outer peripheral edge of the retainer main body 42. On the other hand, on the rear surface of the mounting portion 24 in the housing 20, a cylindrical rear hood portion 27 to which the retainer 40 is attached is provided. As shown in FIG. 8, the rear hood portion 27 is slightly larger than the front hood portion 23 and is disposed at a position offset slightly below the front hood portion 23.

  As shown in FIG. 1, on the outer peripheral surface of the rear hood portion 27, a holding projection 28 capable of locking the attachment piece 45 of the retainer 40 is provided. When the peripheral wall 44 of the retainer 40 is fitted into the rear hood portion 27, as shown in FIG. 2, the attachment piece 45 is locked to the holding projection 28 from the front, so that the retainer 40 is attached to the housing 20. Retained. At this time, as shown in FIG. 5 to FIG. 7, each retaining portion 41 enters each cavity 22 from the rear and abuts against each flange portion 35 from the rear. Accordingly, the terminals 31, 32, 33 are collectively prevented by the retainer 40.

  As shown in FIG. 7, an inner peripheral protrusion 46 that protrudes toward the outer peripheral surface of the terminal body 34 is provided around the inner peripheral surface of the retaining portion 41. A hole through which the terminal main body 34 is inserted is provided in the inner peripheral protrusion 46 so as to penetrate in the front-rear direction. When the retainer 40 is attached to the rear hood portion 27, the electric wire connecting portion 37 and the terminal main body 34 are sequentially inserted into the holes of the inner peripheral protrusion 46, and the power terminal 31 is located at two locations of the abutment portion 26 and the inner peripheral protrusion 46. It becomes the state supported by. The wire connecting portion 37 is accommodated inside the retaining portion 41, and the outer peripheral surface of the retaining portion 41 is arranged along the inner peripheral surface of the terminal accommodating portion 25 with almost no gap.

  As shown in FIG. 1, annular seal members 39 are fitted on the outer peripheral surfaces of the terminal bodies 34. As shown in FIG. 7, the seal member 39 is disposed between the flange portion 35 and the inner peripheral protrusion 46 in the front-rear direction. Further, the seal member 39 is in close contact with both the outer peripheral surface of the terminal main body 34 and the inner peripheral surface of the retaining portion 41, and stops the front end opening of the retaining portion 41. Therefore, it is possible to avoid water that has entered from the front of the cavity 22 from entering the inside of the retaining portion 41 through the hole of the abutting portion 26.

  On the other hand, the retainer seal 43 is in close contact with both the outer peripheral surface of the peripheral wall 44 and the inner peripheral surface of the rear hood portion 27, and stops the opening of the rear hood portion 27. As a result, the water rolled up behind the housing 20 passes between the inner peripheral surface of the rear hood portion 27 and the outer peripheral surface of the peripheral wall 44 and enters the rear hood portion 27 and further enters the cavity 22. You can avoid that.

  Now, a rubber plug 60 for allowing waterproofing from the back side of the charging inlet 10 is fitted into the rear end opening of the retaining portion 41. The rubber plug 60 is made of rubber and has an electric wire insertion hole 61 through which the electric wire W passes as shown in FIG. On the inner peripheral surface of the wire insertion hole 61, at least two inner peripheral lips 62 are provided. Further, at least two outer peripheral lips 63 are provided on the outer peripheral surface of the rubber plug 60 as shown in FIG. As shown in FIG. 7, the rubber plug 60 is accommodated between the outer peripheral surface of the electric wire W and the inner peripheral surface of the retaining portion 41, and the inner peripheral lip 62 is crushed by the outer peripheral surface of the electric wire W, 63 is crushed by the inner peripheral surface of the retaining portion 41. Thereby, it can avoid that water permeates into the inside of the retaining part 41 from the rear end opening of the retaining part 41. Therefore, the inside of the retaining portion 41 is water-stopped by the seal member 39 and the rubber plug 60, and the core wire of the electric wire W connected to the wire connecting portion 37 is not covered with water.

  A sleeve 50 is accommodated between the inner peripheral protrusion 46 and the rubber plug 60 inside the retaining portion 41. The sleeve 50 is made of a synthetic resin and has a cylindrical shape as shown in FIGS. 13 and 14. As shown in FIG. 7, the outer peripheral surface of the sleeve 50 is arranged with almost no gap along the inner peripheral surface of the retaining portion 41. Further, the wire connection part 37 of the terminal 30 and the core wire of the wire W are accommodated in the sleeve 50. When the rubber plug 60 is inserted into the rear end opening of the retaining portion 41, the rubber plug 60 comes into contact with the rear end of the sleeve 50, so that the front end of the rubber plug 60 is made. Therefore, it can be avoided that the rubber plug 60 enters the inside of the retaining portion 41 and cannot be seen from the outside. Moreover, since the front and back length of the rubber plug 60 can be kept to a minimum, the material cost of the rubber plug 60 can be kept low.

  A rear holder 70 is attached to the rear side of the retainer 40. As shown in FIG. 9, the rear holder 70 has a circular holder main body 71, and a plurality of lock pieces 72 are provided at substantially equal angular intervals on the outer peripheral edge of the holder main body 71. As shown in FIG. 10, the lock piece 72 has a cantilever shape. As shown in FIG. 8, the lock piece 72 is provided on the inner peripheral surface of the protective wall 48 that protrudes rearward from the outer peripheral edge of the retainer main body 42. The protrusion 47 is locked from the front. Thereby, the rear holder 70 is held with respect to the retainer 40.

  As shown in FIG. 10, a retaining recess 73 is provided at a position corresponding to the retaining portion 41 in the holder main body 71. As shown in FIG. 7, the rear end portion of the retaining portion 41 can be fitted into the retaining recess 73. The rubber plug 60 is prevented from coming off by the back wall 75 of the retaining recess 73 coming into contact with the rubber plug 60 from behind. Further, as shown in FIG. 9, the holder main body 71 has a U-shaped groove 74 formed by notching between the central portion of the back wall 75 of each retaining recess 73 and the outer peripheral edge of the holder main body 71. Is provided. The groove 74 is for passing the electric wire W, and the rear holder 70 can be attached to the retainer 40 later after the electric wire W is pulled out from the retaining portions 41 to the rear. ing.

  The electric wire W is accommodated in the center of the back wall 75 (the back end of the groove 74). When the electric wire W is shaken, the electric wire W moves to the opening side of the groove portion 74 but does not move in the other direction. However, for example, when a plurality of electric wires W are bundled together by a binding band or the like, the movement of the bundle of electric wires W can be regulated and held. In this way, since the rubber plug 60 can be prevented from coming off by the electric wire holding part (back wall 75), it is not necessary to provide a configuration for preventing the rubber plug 60 from coming off separately from the electric wire holding part.

  Specifically, as shown in FIG. 9, the pair of back walls 75 corresponding to the power terminals 31 opens upward, and the back walls 75 corresponding to the ground terminals 32 open downward as shown in FIG. 9. The pair of back walls 75 corresponding to the signal terminals 33 are opened leftward and rightward, respectively. Therefore, when the bundle of wires W is swung upward, the bundle of wires W is held by the back wall 75 corresponding to the signal terminal 33 and the back wall 75 corresponding to the ground terminal 32. Similarly, when the bundle of electric wires W is swung to the left, the back wall 75 corresponding to the power terminal 31, the back wall 75 corresponding to the right signal terminal 33, and the back wall 75 corresponding to the ground terminal 32 are used. A bundle of electric wires W is held. Since the case where the bundle of electric wires W is swung downward and the case where they are swung to the right is the same, the description thereof is omitted.

  The present embodiment is configured as described above, and the procedure for assembling the charging inlet 10 will be described. First, when assembling the charging inlet 10, the rubber plug 60, the sleeve 50, and the retaining portion 41 of the retainer 40 are inserted through the electric wire W. Next, a seal member 39 is attached to the outer peripheral surface of the terminal body 34 of the terminal 30. Next, the core wire of the electric wire W is inserted into the electric wire connection part 37 of the terminal 30 and crimped. Thereafter, the terminal 30 is inserted into the cavity 22 from the rear, and the retainer 40 is attached to the rear hood portion 27 of the housing 20 from the rear. Then, the retaining portion 41 of the retainer 40 abuts against the flange portion 35 of the terminal 30 from the rear side to prevent the terminal 30 from coming off, and each mounting piece 45 is engaged with each holding projection 28 to cause the retainer 40 to move. It is held by the rear hood part 27.

  Next, the sleeve 50 and the rubber plug 60 previously passed through the electric wire W are inserted into the retaining portion 41 from the rear. The front end of the sleeve 50 is brought into contact with the inner peripheral protrusion 46 of the retaining portion 41 from the rear to stop the front of the sleeve 50, and the front end of the rubber plug 60 is brought into contact with the rear end of the sleeve 50 from the rear to make the rubber plug 60. Is stopped before. In this state, the electric wire W is drawn backward from the rear end opening of the retaining portion 41, and the rear holder 70 is attached to the electric wire W. The rear holder 70 can be retrofitted to the retainer 40 by inserting each electric wire W from the opening of each groove 74 toward the back end. When each electric wire W is accommodated in the inner end of each groove 74, the rear holder 70 is attached to the retainer 40 from the rear, and each lock piece 72 is locked to each lock protrusion 47, whereby the rear holder 70 is held by the retainer 40. Is done. Further, each rubber plug 60 is prevented from being detached by the rear wall 75 of each retaining recess 73 of the rear holder 70.

  As described above, according to the present embodiment, since the electric wire W is held by the electric wire holding portion (the back wall 75) of the rear holder 70, it is possible to avoid stress concentration at the base of the electric wire W. At the same time, since the rubber plug 60 is prevented from being detached by the electric wire holding portion of the rear holder 70, it is not necessary to add new parts, and the rubber plug 60 can be added in consideration of the arrangement of existing parts. Become. Accordingly, the rubber plug 60 can stop the rear end opening of the retaining portion 41 and waterproof from the back side.

It is good also as a structure provided with the resin-made sleeve 50 attached between the outer peripheral surface of the electric wire connection part 37 and the inner peripheral surface of the retaining part 41, and performing the front stop of the rubber stopper 60. FIG.
According to such a configuration, the rubber plug 60 can be prevented from being pushed into the retaining portion 41 by the sleeve 50. In order to prevent the rubber plug 60 from being pushed in, it can be dealt with by making the rubber plug 60 longer, but this is not a good idea because the cost of the parts related to the rubber plug 60 increases. Therefore, the rubber plug 60 can be kept to a minimum size by adding the resin sleeve 50 whose component cost is lower than that of the rubber plug 60.

An inner peripheral protrusion 46 protruding toward the outer peripheral surface of the terminal body 34 is provided on the inner peripheral surface of the retaining portion 41, and the sleeve 50 is in contact with the inner peripheral protrusion 46 from the rear. Also good.
According to such a configuration, the sleeve 50 can be forwardly stopped by the inner circumferential protrusion 46.

A seal member 39 fitted on the outer peripheral surface of the terminal body 34 is provided between the flange portion 35 and the inner peripheral protrusion 46, and the seal member 39 is in close contact with the inner peripheral surface of the retaining portion 41 and the front end of the retaining portion 41. It is good also as a structure which has stopped the opening part.
According to such a configuration, even when water enters the front end opening of the retaining portion 41 so as to go around the retaining portion 41, the front end opening of the retaining portion 41 can be stopped by the seal member 39.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.
(1) Although the front end of the rubber plug 60 is performed using the sleeve 50 in the above embodiment, the sleeve 50 is not necessarily used.

  (2) Although the front end of the sleeve 50 is brought into contact with the inner peripheral protrusion 46 of the retaining portion 41 in the above embodiment, the front end of the sleeve 50 may be brought into contact with the flange portion 35.

  (3) Although the sealing member 39 is fitted on the outer peripheral surface of the terminal main body 34 and is in close contact with the inner peripheral surface of the retaining portion 41 in the above embodiment, the sealing member is attached to the rear surface of the flange portion 35 and the retaining portion 41. You may make it closely_contact | adhere with a front-end part.

  (4) Although the cylindrical electric wire connection part 37 is illustrated in the said embodiment, you may weld the core wire of the electric wire W to the flat wire connection part.

DESCRIPTION OF SYMBOLS 10 ... Charging inlet 20 ... Housing 25 ... Terminal accommodating part 26 ... Abutting part 30 ... Terminal 34 ... Terminal main body 35 ... Flange part 37 ... Electric wire connection part 40 ... Retainer 41 ... Stopping part 50 ... Sleeve 60 ... Rubber plug 70 ... Rear holder 75 ... Back wall (electric wire holding part)
W ... Electric wire

Claims (4)

A terminal body, a flange portion is provided on the outer peripheral surface of the terminal body, and a wire connection portion to which an electric wire is connected is provided behind the flange portion; and
A housing in which the terminal main body has a cylindrical terminal accommodating portion that is accommodated therein, and a contact portion where the flange portion abuts from behind is provided on an inner peripheral surface of the terminal accommodating portion;
A retainer having a tubular retaining portion that abuts against the flange portion from the rear, and the wire connecting portion is housed inside the retaining portion;
A rubber stopper that is in close contact with the outer peripheral surface of the electric wire drawn backward from the electric wire connecting portion and the inner peripheral surface of the retaining portion;
A charging inlet having an electric wire holding portion for holding the electric wire, and the electric wire holding portion being in contact with the rubber plug from behind.   2. The charging inlet according to claim 1, further comprising: a resin sleeve that is mounted between an outer peripheral surface of the electric wire connecting portion and an inner peripheral surface of the retaining portion and that stops the rubber plug in front.   The inner circumferential surface of the retaining portion is provided with an inner circumferential projection that protrudes toward the outer circumferential surface of the terminal body, and the sleeve is in contact with the inner circumferential projection from the rear. Or the charge inlet of Claim 2. A seal member fitted on the outer peripheral surface of the terminal body between the flange portion and the inner peripheral protrusion,
The charging inlet according to claim 3, wherein the seal member is in close contact with an inner peripheral surface of the retaining portion.

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