WO2014200038A1

WO2014200038A1 - Stopper and waterproof connector

Info

Publication number: WO2014200038A1
Application number: PCT/JP2014/065514
Authority: WO
Inventors: 美希中村; 修平安藤
Original assignee: 矢崎総業株式会社
Priority date: 2013-06-14
Filing date: 2014-06-11
Publication date: 2014-12-18
Also published as: JP2015002071A

Abstract

A ring-shaped housing-side flange (34) that protrudes farther than housing-side lip parts (32) do is provided so as to protrude from the outer edge of the end of a stopper (30) that faces a second end (60b) of an electrical cable (60), and when the stopper (30) is placed inside a stopper-containing chamber (24), the housing-side flange (34) contacts the wall (24a) of the stopper-containing chamber (24) and undergoes bending deformation.

Description

Plugs and waterproof connectors

The present invention is to prevent intrusion of liquid such as water, oil, etc. into the terminal housing chamber from the rear portion of the connector housing from which the electric wire connected to the terminal housed in the terminal housing chamber in the connector housing is drawn. The present invention relates to a waterproof connector provided with a plug as a liquid intrusion prevention member, and the plug.

As a waterproof connector that prevents the ingress of liquids such as water, oil, etc., a connector housing, a terminal accommodating chamber formed in the connector housing, a terminal accommodated in the terminal accommodating chamber, and electrically connected to the terminal An electric wire having one end and the other end drawn to the outside of the connector housing, and in the connector housing so as to be juxtaposed in the terminal accommodating chamber along the length direction of the electric wire and surround a part of the outer peripheral surface of the electric wire There is known a device provided with a formed ring-shaped stopper accommodating chamber and a stopper accommodated in the stopper accommodating chamber (see Patent Document 1).

The plug provided in this waterproof connector has two annular lips on its inner peripheral part and is fitted on the electric wire, and also has two annular lips on its outer peripheral part and has an inner wall of the stopper accommodating chamber. Fits around the circumference. Thereby, the waterproof property in a waterproof connector is maintained.

Japanese Unexamined Patent Publication No. 2006-32199

By the way, in the waterproof connector as described above, the coating of the electric wire is reduced due to secular change at the contact portion between the annular lip and the outer peripheral surface of the electric wire that always receives the elastic force from the annular lip, and the adhesion force is reduced. There is a risk. Further, when the ambient temperature changes abruptly, there is a possibility that the adhesion between the annular lip and the electric wire may be reduced due to the difference in the heat shrinkage rate between the housing, the plug, and the electric wire. Moreover, a negative pressure may be generated inside the waterproof connector due to a change in gas density.

If such a decrease in adhesion or generation of negative pressure occurs, there is a risk that the waterproof property between the annular lip and the outer peripheral surface of the electric wire and the inner peripheral surface of the peripheral wall of the plug housing chamber cannot be maintained. Moreover, when these occur in a composite manner, the probability is further increased.

The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a stopper and a waterproof connector capable of maintaining good waterproof properties for a long period of time.

In order to achieve the above-described object, the stopper according to the present invention is characterized by the following points.
(1) A connector housing, a terminal accommodating chamber formed in the connector housing, a terminal accommodated in the terminal accommodating chamber, one end electrically connected to the terminal and the outside of the connector housing. An electric wire having the other end, and an annular shape that is provided in the terminal housing chamber along the length direction of the electric wire and is formed in the connector housing so as to surround a part of the outer peripheral surface of the electric wire. A plug accommodating chamber, and a plug that can be accommodated in the plug accommodating chamber of a waterproof connector comprising:
The stopper has elasticity and is formed in an annular shape,
On the inner peripheral surface of the plug, an annular electric wire side lip portion that is in close contact with a part of the outer peripheral surface of the electric wire is provided to protrude,
On the outer peripheral surface of the plug, an annular housing-side lip portion that closely contacts the inner peripheral surface of the peripheral wall of the plug storage chamber that defines the outline of the plug storage chamber is provided to protrude.
On the outer peripheral surface of the plug, an end on the other end side of the electric wire is provided with an annular housing side flange portion protruding higher than the housing side lip portion,
When the stopper is accommodated in the stopper accommodating chamber, the housing side flange portion is bent and deformed in contact with the peripheral wall of the stopper accommodating chamber.
(2) A plug configured as described in (1) above,
The housing side flange portion is formed with a thickness smaller than the housing side lip portion,
thing.
(3) A connector housing, a terminal accommodating chamber formed in the connector housing, a terminal accommodated in the terminal accommodating chamber, one end electrically connected to the terminal and the outside of the connector housing. An electric wire having the other end, and an annular shape that is provided in the terminal housing chamber along the length direction of the electric wire and is formed in the connector housing so as to surround a part of the outer peripheral surface of the electric wire. A plug accommodating chamber, and a plug that can be accommodated in the plug accommodating chamber of a waterproof connector comprising:
The stopper has elasticity and is formed in an annular shape,
On the inner peripheral surface of the plug, an annular electric wire side lip portion that is in close contact with the outer peripheral surface of a part of the electric wire is provided to protrude,
On the outer peripheral surface of the stopper, an annular housing-side lip portion that closely contacts the inner peripheral surface of the peripheral wall of the stopper accommodating chamber that defines the outline of the stopper accommodating chamber is provided to protrude.
On the inner peripheral surface of the plug, an end on the other end side of the wire is provided with an annular wire-side flange portion protruding higher than the wire-side lip portion,
When the plug is inserted into a part of the electric wire, the electric wire side flange portion comes into contact with an outer peripheral surface of a part of the electric wire to bend and deform.
(4) A plug configured as described in (3) above,
The electric wire side flange portion is formed with a thickness smaller than the electric wire side lip portion,
thing.

In the plug configured as described in (1) above, an annular housing-side flange portion having a protruding height larger than that of the housing-side lip portion is provided on the outer end surface of the plug on the other end side of the electric wire. When the housing side flange portion accommodates the stopper in the stopper accommodating chamber, the housing side flange comes into contact with the peripheral wall of the stopper accommodating chamber and bends and deforms.
For this reason, the housing side flange portion is easily maintained in close contact with the peripheral wall of the plug accommodating chamber, and the adhesion force of the housing side lip portion to the peripheral wall of the plug accommodating chamber is reduced due to secular change or rapid temperature change. However, the waterproof property of the waterproof connector can be maintained.
Further, the housing-side flange portion is bent and deformed so that the distal end thereof extends to the other end portion side of the electric wire (that is, toward the side opposite to the insertion direction of the electric wire) when the plug is accommodated in the plug accommodating chamber. Since it is in close contact with the peripheral wall of the plug housing chamber, even if the inside of the waterproof connector in which the terminals are arranged has a negative pressure, the housing side flange portion is easily maintained in close contact with the peripheral wall of the plug housing chamber. . That is, even when the pressure inside the waterproof connector is negative and the force toward the inner side of the waterproof connector (one end of the electric wire) acts on the plug, the flange on the housing side has a tip other than the above-mentioned electric wire. Since it bends and deforms so as to extend toward the end side and is in close contact with the peripheral wall of the plug accommodating chamber, it is easy to resist the force toward the one end side of the electric wire. Thus, since the housing side flange portion serves as a valve against the negative pressure inside the waterproof connector, the waterproof property of the waterproof connector can be maintained.
In particular, the housing-side flange portion has a protruding height larger than that of the housing-side lip portion and is formed at the end of the plug. Therefore, the housing side flange portion is easily bent and deformed (not easily buckled) and easily falls. Therefore, the housing side flange portion is in close contact with the peripheral wall of the stopper accommodating chamber.
Thereby, the favorable waterproof state by a stopper can be maintained over a long period of time.
In the plug having the above-described configuration (2), the housing side flange portion is formed to have a thickness smaller than that of the housing side lip portion, so that the housing side flange portion is easily bent and deformed and is securely adhered to the peripheral wall of the plug receiving chamber.
In the plug configured as described in (3) above, an annular wire-side flange portion having a protruding height larger than the wire-side lip portion is provided at the end on the other end portion side of the wire on the inner peripheral surface of the plug. When the plug is inserted into the electric wire, the electric wire side flange portion comes into contact with the outer peripheral surface of the electric wire and bends and deforms.
For this reason, even when the electric wire side flange portion is easily maintained in close contact with the outer peripheral surface of the electric wire, even when the adhesion force of the electric wire side lip portion to the outer peripheral surface of the electric wire is reduced due to secular change or rapid temperature change. The waterproofness of the waterproof connector can be maintained.
Further, when the plug is inserted into the electric wire, the electric wire side flange portion is bent and deformed so that the tip thereof extends to the other end portion side of the electric wire (that is, toward the opposite side of the electric wire insertion direction). Since it is in close contact with the peripheral wall of the plug accommodating chamber, even when the inside of the waterproof connector in which the terminals are arranged has a negative pressure, the electric wire side flange portion is easily maintained in close contact with the outer peripheral surface of the electric wire. In other words, even if the inside of the waterproof connector is under negative pressure and a force directed toward the inside of the waterproof connector (one end of the electric wire) acts on the plug, the end of the electric wire side flange is the other end of the electric wire. Since it bends and deforms so as to extend toward the end side and is in close contact with the outer peripheral surface of the electric wire, it is easy to counter the force toward the one end side of the electric wire. Thus, since the electric wire side flange part plays the role of a valve with respect to the negative pressure inside the waterproof connector, the waterproof property of the waterproof connector can be maintained.
In particular, the wire-side flange portion has a protruding height larger than that of the wire-side lip portion and is formed at the end of the plug. Therefore, the electric wire side flange part is easy to bend and deform (it is hard to buckle), and is easy to fall down. Therefore, the electric wire side flange portion is firmly attached to the peripheral wall of the stopper accommodating chamber.
Thereby, the favorable waterproof state by a stopper can be maintained over a long period of time.
In the plug configured as described in (4) above, the wire side flange portion is formed to have a thickness smaller than that of the wire side lip portion.

In order to achieve the above-described object, the waterproof connector according to the present invention is characterized by the following points.
(5) a connector housing;
A terminal accommodating chamber formed in the connector housing;
A terminal accommodated in the terminal accommodating chamber;
An electric wire having one end electrically connected to the terminal and the other end pulled out of the connector housing;
A ring-shaped plug housing chamber that is arranged in the terminal housing chamber along the length direction of the electric wire and is formed in the connector housing so as to surround a part of the outer peripheral surface of the electric wire;
A stopper accommodated in the stopper accommodating chamber;
A waterproof connector comprising:
The stopper has elasticity and is formed in an annular shape,
On the inner peripheral surface of the plug, an annular electric wire side lip portion that is in close contact with a part of the outer peripheral surface of the electric wire is provided to protrude,
On the outer peripheral surface of the plug, an annular housing-side lip portion that closely contacts the inner peripheral surface of the peripheral wall of the plug storage chamber that defines the outline of the plug storage chamber is provided to protrude.
On the outer peripheral surface of the plug, an end on the other end side of the electric wire is provided with an annular housing-side flange portion protruding higher than the housing-side lip portion,
When the stopper is accommodated in the stopper accommodating chamber, the housing side flange portion is bent and deformed in contact with the peripheral wall of the stopper accommodating chamber.
thing.
(6) a connector housing;
A terminal accommodating chamber formed in the connector housing;
A terminal accommodated in the terminal accommodating chamber;
An electric wire having one end electrically connected to the terminal and the other end pulled out of the connector housing;
A ring-shaped plug housing chamber that is arranged in the terminal housing chamber along the length direction of the electric wire and is formed in the connector housing so as to surround a part of the outer peripheral surface of the electric wire;
A stopper accommodated in the stopper accommodating chamber;
A waterproof connector comprising:
The stopper has elasticity and is formed in an annular shape,
On the inner peripheral surface of the plug, an annular electric wire side lip portion that is in close contact with a part of the outer peripheral surface of the electric wire is provided to protrude,
On the outer peripheral surface of the plug, an annular housing-side lip portion that closely contacts the inner peripheral surface of the peripheral wall of the plug storage chamber that defines the outline of the plug storage chamber is provided to protrude.
On the inner peripheral surface of the plug, an end portion on the other end side of the electric wire is provided with an annular electric wire side flange portion protruding higher than the electric wire side lip portion,
When the plug is inserted into a part of the electric wire, the electric wire side flange portion is bent and deformed in contact with a part of the outer peripheral surface of the electric wire,
thing.

In the waterproof connector having the above-described configuration (5), an annular housing-side flange portion having a protruding height larger than that of the housing-side lip portion is provided at the end portion on the other end portion side of the electric wire on the outer peripheral surface of the plug. When the plug is accommodated in the plug accommodating chamber, the housing side flange portion comes into contact with the peripheral wall of the plug accommodating chamber and bends and deforms.
For this reason, the housing side flange portion is easily maintained in close contact with the peripheral wall of the plug accommodating chamber, and the adhesion force of the housing side lip portion to the peripheral wall of the plug accommodating chamber is reduced due to secular change or rapid temperature change. However, the waterproof property of the waterproof connector can be maintained.
Further, the housing-side flange portion is bent and deformed so that the distal end thereof extends to the other end portion side of the electric wire (that is, toward the side opposite to the insertion direction of the electric wire) when the plug is accommodated in the plug accommodating chamber. Since it is in close contact with the peripheral wall of the plug housing chamber, even if the inside of the waterproof connector in which the terminals are arranged has a negative pressure, the housing side flange portion is easily maintained in close contact with the peripheral wall of the plug housing chamber. . That is, even when the pressure inside the waterproof connector is negative and the force toward the inner side of the waterproof connector (one end of the electric wire) acts on the plug, the flange on the housing side has a tip other than the above-mentioned electric wire. Since it bends and deforms so as to extend toward the end side and is in close contact with the peripheral wall of the plug accommodating chamber, it is easy to resist the force toward the one end side of the electric wire. Thus, since the housing side flange portion serves as a valve against the negative pressure inside the waterproof connector, the waterproof property of the waterproof connector can be maintained.
In particular, the housing-side flange portion has a protruding height larger than that of the housing-side lip portion and is formed at the end of the plug. Therefore, the housing side flange portion is easily bent and deformed (not easily buckled) and easily falls. Therefore, the housing side flange portion is in close contact with the peripheral wall of the stopper accommodating chamber.
Thereby, the favorable waterproof state by a stopper can be maintained over a long period of time.
In the waterproof connector having the above-described configuration (6), an annular wire-side flange portion having a protruding height larger than that of the wire-side lip portion is provided at the end portion on the other end portion side of the wire on the inner peripheral surface of the plug. When the plug is inserted into the electric wire, the electric wire side flange portion comes into contact with the outer peripheral surface of the electric wire and bends and deforms.
For this reason, even when the electric wire side flange portion is easily maintained in close contact with the outer peripheral surface of the electric wire, even when the adhesion force of the electric wire side lip portion to the outer peripheral surface of the electric wire is reduced due to secular change or rapid temperature change. The waterproofness of the waterproof connector can be maintained.
Further, when the plug is inserted into the electric wire, the electric wire side flange portion is bent and deformed so that the tip thereof extends to the other end portion side of the electric wire (that is, toward the opposite side of the electric wire insertion direction). Since it is in close contact with the outer peripheral surface of the electric wire, even when the inside of the waterproof connector in which the terminals are arranged has a negative pressure, the electric wire side flange portion is easily maintained in close contact with the outer peripheral surface of the electric wire. In other words, even if the inside of the waterproof connector is under negative pressure and a force directed toward the inside of the waterproof connector (one end of the electric wire) acts on the plug, the end of the electric wire side flange is the other end of the electric wire. Since it bends and deforms so as to extend toward the end side and is in close contact with the outer peripheral surface of the electric wire, it is easy to counter the force toward the one end side of the electric wire. Thus, since the electric wire side flange part plays the role of a valve with respect to the negative pressure inside the waterproof connector, the waterproof property of the waterproof connector can be maintained.
In particular, the wire-side flange portion has a protruding height larger than that of the wire-side lip portion and is formed at the end of the plug. Therefore, the electric wire side flange part is easy to bend and deform (it is hard to buckle), and is easy to fall down. Therefore, the electric wire side flange portion is firmly attached to the peripheral wall of the stopper accommodating chamber.
Thereby, the favorable waterproof state by a stopper can be maintained over a long period of time.

According to the present invention, it is possible to provide a stopper and a waterproof connector capable of maintaining good waterproofness over a long period of time.

The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading through the modes for carrying out the invention described below with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of a waterproof connector according to an embodiment of the present invention. FIG. 2 is a cross-sectional perspective view of a part of the waterproof connector. 3A and 3B are diagrams showing a plug provided in the waterproof connector, in which FIG. 3A is a side view and FIG. 3B is a cross-sectional view. FIG. 4 is a diagram illustrating a procedure for inserting the waterproof connector into the electric wire, and FIGS. 4A to 4C are cross-sectional views of the waterproof connector.

Hereinafter, exemplary embodiments according to the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of a waterproof connector according to an embodiment of the present invention. FIG. 2 is a cross-sectional perspective view of a part of the waterproof connector. 3A and 3B are diagrams showing a plug provided in the waterproof connector, in which FIG. 3A is a side view and FIG. 3B is a cross-sectional view.

As shown in FIG. 1, a waterproof connector 10 with a plug according to an embodiment of the present invention includes a connector housing 11 and a plug 30. One end portion 60 a of an electric wire 60 that is a covered electric wire is drawn into the waterproof connector 10, and the other end portion 60 b of the electric wire 60 is drawn out from the waterproof connector 10. A holder 12 is attached to the end of the connector housing 11 on the drawing side of the electric wire 60.

The connector housing 11 is made of a synthetic resin and has a hollow cylindrical housing portion 15 and a hollow cylindrical mating connector fitting portion 16. A flat plate-like base 14 having a plurality of screw insertion holes 13 is formed on the outer peripheral side of the accommodating portion 15.

The connector housing 11 is inserted into the mounting hole 2 of the mounting plate 1 of the apparatus or the like until the base 14 comes into contact with the mounting plate 1 and the screw (not shown) inserted from the screw insertion hole 13. Is fixed to the mounting plate 1 by being screwed into a screw hole (not shown) of the mounting plate 1.

Inside the accommodating portion 15 of the connector housing 11, there are a terminal accommodating chamber 17, a terminal accommodating chamber 17 that is arranged in parallel with the terminal accommodating chamber 17 along the length direction of the electric wire 60, and communicates with the plug accommodating chamber 24. Is formed. A lance 18 is formed to protrude in the terminal accommodating chamber 17. Further, the plug accommodating chamber 24 is formed in an annular shape so as to surround a part of the outer peripheral surface in the longitudinal direction of the electric wire 60.

A terminal 19 is accommodated in the terminal accommodating chamber 17. The terminal 19 has an electrical contact portion 20 that is electrically connected to a terminal (not shown) housed in a counterpart connector (not shown) fitted to the counterpart connector fitting portion 16 at the tip thereof. Yes. Moreover, the terminal 19 has the electric wire connection part 21 electrically connected to the conductor 61 exposed from the jacket 62 of the electric wire 60 in the base end part. The wire connection portion 21 is crimped and connected to the conductor 61 of the wire 60 by crimping.

An engagement hole 22 is formed between the electrical contact portion 20 and the electric wire connection portion 21 in the longitudinal direction of the terminal 19, and the projection 19 a of the lance 18 is inserted into the engagement hole 22, whereby the terminal 19 Is prevented from coming off in the terminal accommodating chamber 17. A plug 30 is assembled in the plug storage chamber 24 located above the terminal storage chamber 17.

The holder 12 is formed in a disc shape, and an insertion hole 12a through which the electric wire 60 is inserted is formed at the center thereof. An annular fitting groove 12b is formed in the holder 12 on the connector housing 11 side. The end of the connector housing 11 is fitted in the fitting groove 12b. The holder 12 is mounted on the side of the connector housing 11 from which the electric wire 60 is drawn, whereby the plug housing chamber 24 of the connector housing 11 is closed.

As shown in FIG. 2, the plug 30 is made of an elastic material such as rubber and is formed in an annular shape. The plug 30 is fitted on the inner peripheral surface of the peripheral wall 24 a that is fitted on the electric wire 60 and defines the outline of the plug housing chamber 24.

As shown in FIG. 3, a plurality of annular electric wire side lip portions 31 that are in close contact with a part of the outer peripheral surface of the electric wire 60 are provided protruding from the inner peripheral surface of the plug 30. These electric wire side lip portions 31 are arranged at intervals in the axial direction.

Also, a plurality of annular housing-side lip portions 32 that are in close contact with the inner peripheral surface of the peripheral wall 24a of the plug accommodating chamber 24 are provided protruding from the outer peripheral surface of the plug 30. These housing side lip portions 32 are arranged at intervals in the axial direction.

The plug 30 is formed with an annular electric wire side flange portion 33 at an end portion on the other end portion 60b side of the electric wire 60 on the inner peripheral surface thereof. The electric wire side flange portion 33 is formed in an annular shape having a protruding height larger than that of the electric wire side lip portion 31. The electric wire side flange portion 33 is formed to be thinner than the electric wire side lip portion 31. The thickness of the electric wire side flange portion 33 and the thickness of the electric wire side lip portion 31 referred to in this specification are the thicknesses in the direction along the axial direction of the plug 30. The thickness refers to a distance between two rising portions sandwiching the tip portion that is the most protruding portion in the protruding portion. In a state where the plug 30 is inserted into the electric wire 60, the electric wire side flange portion 33 is in contact with a part of the outer peripheral surface of the electric wire 60 and is opposite to the insertion direction into the electric wire 60 (downward direction in FIG. 2). It bends and deforms and falls into a state.

Further, the plug 30 is formed with an annular housing-side flange portion 34 at an end portion on the other end portion 60b side of the electric wire 60 on the outer peripheral surface thereof. The housing side flange portion 34 is formed in an annular shape having a protruding height larger than that of the housing side lip portion 32. The housing side flange portion 34 is formed to have a smaller thickness than the housing side lip portion 32. Similar to the case of the wire-side flange portion 33 and the wire-side lip portion 31 described above, the thickness of the housing-side flange portion 34 and the thickness of the housing-side lip portion 32 referred to in this specification are the same as those of the plug 30. It is the thickness along the axial direction. In the state where the plug 30 is housed in the plug housing chamber 24, the housing side flange portion 34 comes into contact with the peripheral wall 24 a of the plug housing chamber 24 and is inserted into the plug housing chamber 24 (downward direction in FIG. 2). It bends and deforms to the opposite side and falls into a collapsed state.

That is, the inner diameter of the peripheral wall 24 a of the plug accommodating chamber 24 is substantially equal to the outer diameter of the plug 30 excluding the housing side lip portion 32 and the housing side flange portion 34, and the outer diameter of the plug 30 including the housing side lip portion 32. It is provided so that it may become smaller. In addition, the annularly formed plug 30 has an inner diameter substantially equal to the outer diameter of the electric wire 60 excluding the electric wire side lip portion 31 and the electric wire side flange portion 33, and the outer side of the electric wire 60 including the electric wire side lip portion 31. It is formed so as to be smaller than the diameter.

Next, a case where the waterproof connector 10 is inserted into the end of the electric wire 60 will be described.
FIG. 4 is a diagram illustrating a procedure for inserting the waterproof connector into the electric wire, and FIGS. 4A to 4C are cross-sectional views of the waterproof connector.

As shown in FIG. 4A, the electric wire 60 is inserted into the plug 30 from the side where the electric wire side flange portion 33 and the housing side flange portion 34 are formed. That is, it inserts in the arrow A direction in Fig.4 (a). The holder 12 is attached to the electric wire 60 by passing the electric wire 60 through the insertion hole 12a of the holder 12 in advance.

When the electric wire 60 is inserted into the plug 30, the electric wire side flange portion 33 is dragged by the outer peripheral surface of the electric wire 60 and is bent toward the insertion direction of the electric wire 60 (the direction of arrow A in FIG. 4A). . From this state, the wire 30 is slightly pulled with respect to the plug 30 in the direction in which the wire 60 is pulled out (the direction opposite to the arrow A in FIG. 4A). If it does in this way, the electric wire side flange part 33 bent in the insertion direction (arrow A direction in FIG. 4A) side of the electric wire 60 will be dragged by the outer peripheral surface of the electric wire 60 and returned to the opposite side to the insertion direction.

4B. As a result, as shown in FIG. 4B, the electric wire side flange portion 33 comes into contact with the outer peripheral surface of a part of the electric wire 60, is deformed, and falls. In addition, the two electric wire side lip portions 31 are in close contact with the outer peripheral surface of the electric wire 60.

After inserting the electric wire 60 into the plug 30, a terminal treatment is applied to one end 60 a of the electric wire 60 to expose the conductor 61. Then, the electric wire connecting portion 21 of the terminal 19 is crimped and crimped to the one end portion 60a of the electric wire 60 from which the conductor 61 is exposed.

Next, the electric wire 60 to which the plug 30 is inserted and the plug 30 are inserted into the accommodating portion 15 of the connector housing 11 from the one end portion 60a side of the electric wire 60 to which the terminal 19 is connected. That is, it inserts in the arrow B direction in FIG.4 (c).

As a result, as shown in FIG. 4C, the electrical contact portion 20 of the terminal 19 connected to the electric wire 60 is inserted into the terminal accommodating chamber 17 of the connector housing 11, and the engagement hole 22 of the terminal 19 is inserted. The protrusion 18a of the lance 18 is inserted. As a result, the terminal 19 is locked in the terminal accommodating chamber 17.

Further, the plug 30 inserted into the electric wire 60 is inserted into the plug housing chamber 24 of the connector housing 11 and fitted. Then, the plug 30 is accommodated in the plug accommodating chamber 24 in a state where the two housing-side lip portions 32 are in close contact with the inner peripheral surface of the peripheral wall 24 a of the plug accommodating chamber 24.

When the plug 30 is inserted into the plug accommodating chamber 24 from the one end 60 a side of the electric wire 60 and accommodated, the housing side flange portion 34 of the plug 30 comes into contact with the inner peripheral surface of the peripheral wall 24 a of the plug accommodating chamber 24. Then, it is in a state where it is bent and deformed in the direction opposite to the direction of insertion into the plug accommodating chamber 24 (the direction of arrow B in FIG. 4 (c)).

Thus, when the plug 30 inserted into the electric wire 60 is fitted into the plug accommodating chamber 24 of the connector housing 11, the electric wire side lip portion 31 is brought into close contact with the outer peripheral surface of the electric wire 60, and the inner wall 24 a of the plug accommodating chamber 24 is The housing side lip portion 32 is in close contact with the peripheral surface. Furthermore, the electric wire side flange portion 33 is bent and deformed and adhered to the outer peripheral surface of the other end portion 60b of the electric wire 60, and the housing side flange portion 34 is bent and deformed and adhered to the inner peripheral surface of the peripheral wall 24a of the plug housing chamber 24. To do.

Thereby, the space between the electric wire 60 and the plug accommodating chamber 24 of the housing 11 is sealed by the plug 30 and is surely waterproofed.

Thereafter, the holder 12 is put on the end of the connector housing 11 on the side of the plug housing chamber 24, and the end of the connector housing 11 is fitted into the fitting groove 12 b of the holder 12. As a result, the holder 12 is mounted on the connector housing 11 and the plug housing chamber 24 of the connector housing 11 in which the plug 30 is housed is closed.

Thus, according to the plug 30 and the waterproof connector 10 according to the above embodiment, the wire-side lip portion 31 of the plug 30 is in close contact with a part of the outer peripheral surface of the wire 60, and the housing-side lip portion 32 of the plug 30 is Since it closely adheres to the inner peripheral surface of the peripheral wall 24a of the plug housing chamber 24, the gap between the electric wire 60 and the connector housing 11 can be well waterproofed by the plug 30.

Here, as described above, in the conventional waterproof connector, a secular change or a rapid temperature change occurs, and the adhesion force of the electric wire side lip portion 31 to the electric wire 60 and the plug housing chamber 24 of the housing side lip portion 32 are increased. There is a possibility that the waterproofness by the electric wire side lip portion 31 and the housing side lip portion 32 may be reduced due to a decrease in adhesion to the peripheral wall 24a or a negative pressure inside the waterproof connector 10 where the terminals 19 are arranged. It was.

On the other hand, in the waterproof connector 10 according to the present embodiment, an annular housing having a protruding height larger than the housing-side lip portion 32 at the end portion on the other end portion 60b side of the electric wire 60 on the outer peripheral surface of the plug 30. A side flange portion 34 is provided so as to protrude. When the housing side flange portion 34 accommodates the stopper 30 in the stopper accommodating chamber 24, the housing side flange portion 34 comes into contact with the peripheral wall 24 a of the stopper accommodating chamber 24 and the other end portion 60 b side of the electric wire 60. To bend and deform. Further, an annular wire-side flange portion 33 having a protruding height larger than that of the wire-side lip portion 31 is provided at the end of the inner peripheral surface of the plug 30 on the side of the other end portion 60b of the wire 60. When the side flange portion 33 is inserted into the electric wire 60, the side flange portion 33 is bent and deformed so as to contact a part of the outer peripheral surface of the electric wire 60 and extend toward the other end portion 60 b of the electric wire 60.

For this reason, due to secular change and rapid temperature change, the adhesion force of the electric wire side lip portion 31 to the electric wire 60 and the adhesion force of the housing side lip portion 32 to the peripheral wall 24a of the plug housing chamber 24 are reduced, or the terminal 19 is disposed. Even if the inside of the waterproof connector 10 is subjected to negative pressure, the housing side flange portion 34 is maintained in close contact with the peripheral wall 24 a of the plug accommodating chamber 24, and the electric wire side flange portion 33 is in close contact with the outer peripheral surface of the electric wire 60. Maintained. That is, even if the inside of the waterproof connector 10 has a negative pressure and the force toward the inner side of the waterproof connector 10 (one end 60a side of the electric wire 60) acts on the plug 30, the housing side flange portion 34 and the electric wire side The flange portion 33 is bent and deformed so that the tip thereof extends toward the other end portion 60 b of the electric wire 60 (that is, toward the side opposite to the insertion direction of the electric wire 60), or the peripheral wall of the plug housing chamber 24 or the outer periphery of the electric wire 60. Since it is in close contact with the surface, it is easy to counter the force toward the one end 60a side of the electric wire 60. As described above, according to the waterproof connector 10 according to the present embodiment, even when the inside of the waterproof connector 10 has a negative pressure, the electric wire side flange portion 33 and the housing side flange portion 34 serve as a valve. Therefore, waterproofness can be maintained.

In particular, the housing side flange portion 34 has a protruding height larger than that of the housing side lip portion 32 and is formed at the end portion of the plug 30, and the electric wire side flange portion 33 is more than the electric wire side lip portion 31. The protruding height is large and formed at the end of the plug 30. For this reason, the housing side flange part 34 and the electric wire side flange part 33 are easy to bend and deform (it is hard to buckle), and are easy to fall down. Therefore, the housing-side flange portion 34 is securely attached to the peripheral wall 24 a of the plug accommodating chamber 24, and the wire-side flange portion 33 is securely attached to the outer peripheral surface of the wire 60.

Furthermore, since the housing-side flange portion 34 is formed to have a thickness smaller than that of the housing-side lip portion 32, the housing-side flange portion 34 is easily bent and deformed so as to be in close contact with the peripheral wall 24a of the plug housing chamber 24. Further, since the wire side flange portion 33 is formed to have a thickness smaller than that of the wire side lip portion 31, the wire side flange portion 33 is easily bent and deformed and is securely adhered to the outer peripheral surface of the wire 60.

As a result, according to the waterproof connector 10 according to the present embodiment, a good waterproof state in which the gap between the wire 60 and the connector housing 11 by the plug 30 can be maintained for a long period of time.

Below, it summarizes about the stopper 30 and the waterproof connector 10 which concern on embodiment.
(1) The plug 30 according to the embodiment is electrically connected to the connector housing 11, the terminal accommodating chamber 17 formed in the connector housing 11, the terminal 19 accommodated in the terminal accommodating chamber 17, and the terminal 19. A wire 60 having one end 60a connected to the other end and the other end 60b drawn to the outside of the connector housing 11, and a part of the wire 60 arranged in parallel in the terminal accommodating chamber 17 along the length direction of the wire 60. This is a plug 30 that can be housed in the plug housing chamber 24 of the waterproof connector 10, which includes an annular plug housing chamber 24 formed in the connector housing 11 so as to surround the outer peripheral surface of the waterproof connector 10. The plug 30 has elasticity and is formed in an annular shape. On the inner peripheral surface of the plug 30, an annular electric wire side lip portion 31 that is in close contact with a part of the outer peripheral surface of the electric wire 60 protrudes. On the outer peripheral surface of the plug 30, an annular housing side lip portion 32 that projects in close contact with the inner peripheral surface of the peripheral wall 24 a of the plug storage chamber 24 that defines the outline of the plug storage chamber 24 is provided. On the outer peripheral surface of the plug 30, an annular housing-side flange portion 34 having a protruding height larger than that of the housing-side lip portion 32 protrudes from the end of the electric wire 60 on the other end 60 b side. Is housed in the plug housing chamber 24, the housing side flange portion 34 comes into contact with the peripheral wall 24 a of the plug housing chamber 24 and bends and deforms.
(2) In the plug 30 according to the embodiment, the housing-side flange portion 34 is formed to be thinner than the housing-side lip portion 32.
(3) The plug 30 according to the embodiment is electrically connected to the connector housing 11, the terminal accommodating chamber 17 formed in the connector housing 11, the terminal 19 accommodated in the terminal accommodating chamber 17, and the terminal 19. A wire 60 having one end 60a connected to the other end and the other end 60b drawn to the outside of the connector housing 11, and a part of the wire 60 arranged in parallel in the terminal accommodating chamber 17 along the length direction of the wire 60. This is a plug 30 that can be housed in the plug housing chamber 24 of the waterproof connector 10, which includes an annular plug housing chamber 24 formed in the connector housing 11 so as to surround the outer peripheral surface of the waterproof connector 10. The plug 30 has elasticity and is formed in an annular shape. On the inner peripheral surface of the plug 30, an annular electric wire side lip portion 31 that is in close contact with a part of the outer peripheral surface of the electric wire 60 protrudes. On the outer peripheral surface of the plug 30, an annular housing side lip portion 32 that projects in close contact with the inner peripheral surface of the peripheral wall 24 a of the plug storage chamber 24 that defines the outline of the plug storage chamber 24 is provided. On the inner peripheral surface of the plug 30, an end of the electric wire 60 on the other end 60b side is provided with an annular electric wire-side flange portion 33 protruding higher than the electric wire-side lip portion 31. When 30 is inserted into a part of the electric wire 60, the electric wire side flange portion 33 comes into contact with a part of the outer peripheral surface of the electric wire 60 and bends and deforms.
(4) In the plug 30 according to the embodiment, the electric wire side flange portion 33 is formed to be thinner than the electric wire side lip portion 31.
(5) The waterproof connector 10 according to the embodiment includes a connector housing 11, a terminal accommodating chamber 17 formed in the connector housing 11, a terminal 19 accommodated in the terminal accommodating chamber 17, and an electrical connection to the terminal 19. One end 60 a connected to each other and the other end 60 b drawn to the outside of the connector housing 11, and the electric wire 60 arranged in parallel in the terminal accommodating chamber 17 along the length direction of the electric wire 60. The waterproof connector 10 includes an annular plug housing chamber 24 formed in the connector housing 11 so as to surround the outer peripheral surface of the portion, and a plug 30 housed in the plug housing chamber 24. The plug 30 has elasticity and is formed in an annular shape. On the inner peripheral surface of the plug 30, an annular electric wire side lip portion 31 that is in close contact with a part of the outer peripheral surface of the electric wire 60 protrudes. On the outer peripheral surface of the plug 30, an annular housing side lip portion 32 that projects in close contact with the inner peripheral surface of the peripheral wall 24 a of the plug storage chamber 24 that defines the outline of the plug storage chamber 24 is provided. On the outer peripheral surface of the plug 30, an annular housing-side flange portion 34 having a protruding height larger than that of the housing-side lip portion 32 protrudes from the end of the electric wire 60 on the other end 60 b side. Is housed in the plug housing chamber 24, the housing side flange portion 34 comes into contact with the peripheral wall 24 a of the plug housing chamber 24 and bends and deforms.
(6) The waterproof connector 10 according to the embodiment includes a connector housing 11, a terminal accommodating chamber 17 formed in the connector housing 11, a terminal 19 accommodated in the terminal accommodating chamber 17, and an electrical connection to the terminal 19. One end 60 a connected to each other and the other end 60 b drawn to the outside of the connector housing 11, and the electric wire 60 arranged in parallel in the terminal accommodating chamber 17 along the length direction of the electric wire 60. The waterproof connector 10 includes an annular plug housing chamber 24 formed in the connector housing 11 so as to surround the outer peripheral surface of the portion, and a plug 30 housed in the plug housing chamber 24. The plug 30 has elasticity and is formed in an annular shape. On the inner peripheral surface of the plug 30, an annular electric wire side lip portion 31 that is in close contact with a part of the outer peripheral surface of the electric wire 60 protrudes. On the outer peripheral surface of the plug 30, an annular housing side lip portion 32 that projects in close contact with the inner peripheral surface of the peripheral wall 24 a of the plug storage chamber 24 that defines the outline of the plug storage chamber 24 is provided. On the inner peripheral surface of the plug 30, an end of the electric wire 60 on the other end 60b side is provided with an annular electric wire-side flange portion 33 protruding higher than the electric wire-side lip portion 31. When 30 is inserted into a part of the electric wire 60, the electric wire side flange portion 33 comes into contact with a part of the outer peripheral surface of the electric wire 60 and bends and deforms.

It should be noted that the technical scope of the present invention is not limited to the above-described embodiment. The above-described embodiments can be accompanied by various modifications and improvements within the technical scope of the present invention.

Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.

This application is based on a Japanese patent application filed on June 14, 2013 (Japanese Patent Application No. 2013-125822), the contents of which are incorporated herein by reference.

According to the present invention, good waterproofness can be maintained over a long period of time. The present invention that exhibits this effect allows water, oil, and the like to enter the terminal housing chamber from the rear of the connector housing from which the wires connected to the terminals housed in the terminal housing chamber in the connector housing are drawn. The present invention is useful for a waterproof connector provided with a plug as a liquid intrusion prevention member for preventing the plug, and the plug.

10: waterproof connector 11: connector housing 17: terminal accommodating chamber 19: terminal 24: stopper accommodating chamber 24a: peripheral wall 30: stopper 31: electric wire side lip portion 32: housing side lip portion 33: electric wire side flange portion 34: housing side flange Part 60: Electric wire 60a: One end part 60b: The other end part

Claims

A connector housing, a terminal accommodating chamber formed in the connector housing, a terminal accommodated in the terminal accommodating chamber, one end electrically connected to the terminal, and the other drawn out of the connector housing An electric wire having an end, and a ring-shaped plug housing that is arranged in the terminal housing chamber along the length direction of the electric wire and is formed in the connector housing so as to surround a part of the outer peripheral surface of the electric wire. A stopper that can be accommodated in the stopper accommodating chamber of a waterproof connector comprising a chamber,
The stopper has elasticity and is formed in an annular shape,
On the inner peripheral surface of the plug, an annular electric wire side lip portion that is in close contact with a part of the outer peripheral surface of the electric wire is provided to protrude,
On the outer peripheral surface of the plug, an annular housing-side lip portion that closely contacts the inner peripheral surface of the peripheral wall of the plug storage chamber that defines the outline of the plug storage chamber is provided to protrude.
On the outer peripheral surface of the plug, an end on the other end side of the electric wire is provided with an annular housing-side flange portion protruding higher than the housing-side lip portion,
When the stopper is accommodated in the stopper accommodating chamber, the housing side flange portion is bent and deformed in contact with the peripheral wall of the stopper accommodating chamber.
plug.
The housing side flange portion is formed with a thickness smaller than the housing side lip portion,
The stopper according to claim 1.
A connector housing, a terminal accommodating chamber formed in the connector housing, a terminal accommodated in the terminal accommodating chamber, one end electrically connected to the terminal, and the other drawn out of the connector housing An electric wire having an end, and a ring-shaped plug housing that is arranged in the terminal housing chamber along the length direction of the electric wire and is formed in the connector housing so as to surround a part of the outer peripheral surface of the electric wire. A stopper that can be accommodated in the stopper accommodating chamber of a waterproof connector comprising a chamber,
The stopper has elasticity and is formed in an annular shape,
On the inner peripheral surface of the plug, an annular electric wire side lip portion that is in close contact with a part of the outer peripheral surface of the electric wire is provided to protrude,
On the outer peripheral surface of the plug, an annular housing-side lip portion that closely contacts the inner peripheral surface of the peripheral wall of the plug storage chamber that defines the outline of the plug storage chamber is provided to protrude.
On the inner peripheral surface of the plug, an end portion on the other end side of the electric wire is provided with an annular electric wire side flange portion protruding higher than the electric wire side lip portion,
When the plug is inserted into a part of the electric wire, the electric wire side flange portion is bent and deformed in contact with a part of the outer peripheral surface of the electric wire,
plug.
The electric wire side flange portion is formed with a thickness smaller than the electric wire side lip portion,
The stopper according to claim 3.
A connector housing;
A terminal accommodating chamber formed in the connector housing;
A terminal accommodated in the terminal accommodating chamber;
An electric wire having one end electrically connected to the terminal and the other end pulled out of the connector housing;
A ring-shaped plug housing chamber that is arranged in the terminal housing chamber along the length direction of the electric wire and is formed in the connector housing so as to surround a part of the outer peripheral surface of the electric wire;
A stopper accommodated in the stopper accommodating chamber;
A waterproof connector comprising:
The stopper has elasticity and is formed in an annular shape,
On the inner peripheral surface of the plug, an annular electric wire side lip portion that is in close contact with a part of the outer peripheral surface of the electric wire is provided to protrude,
On the outer peripheral surface of the plug, an annular housing-side lip portion that closely contacts the inner peripheral surface of the peripheral wall of the plug storage chamber that defines the outline of the plug storage chamber is provided to protrude.
On the outer peripheral surface of the plug, an end on the other end side of the electric wire is provided with an annular housing-side flange portion protruding higher than the housing-side lip portion,
When the stopper is accommodated in the stopper accommodating chamber, the housing side flange portion is bent and deformed in contact with the peripheral wall of the stopper accommodating chamber.
Waterproof connector.
A connector housing;
A terminal accommodating chamber formed in the connector housing;
A terminal accommodated in the terminal accommodating chamber;
An electric wire having one end electrically connected to the terminal and the other end pulled out of the connector housing;
A ring-shaped plug housing chamber that is arranged in the terminal housing chamber along the length direction of the electric wire and is formed in the connector housing so as to surround a part of the outer peripheral surface of the electric wire;
A stopper accommodated in the stopper accommodating chamber;
A waterproof connector comprising:
The stopper has elasticity and is formed in an annular shape,
On the inner peripheral surface of the plug, an annular electric wire side lip portion that is in close contact with a part of the outer peripheral surface of the electric wire is provided to protrude,
On the outer peripheral surface of the plug, an annular housing-side lip portion that closely contacts the inner peripheral surface of the peripheral wall of the plug storage chamber that defines the outline of the plug storage chamber is provided to protrude.
On the inner peripheral surface of the plug, an end portion on the other end side of the electric wire is provided with an annular electric wire side flange portion protruding higher than the electric wire side lip portion,
When the plug is inserted into a part of the electric wire, the electric wire side flange portion is bent and deformed in contact with a part of the outer peripheral surface of the electric wire,
Waterproof connector.