JP2003077584A - Waterproof connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof connector assuring a stable waterproof performance for a long period of time by putting a sheath to cover a terminal in tight attachment to the interface with the insulating covering of each cable. SOLUTION: The waterproof connector 1 includes a plug side sheath 20 to cover a male terminal 21 of a plug 2 and a receptacle side sheath 20 to cover a female terminal 31 of a receptacle 3, wherein a fastening ring 5 capable of contracting diametrically by a pressure tightening is attached to the periphery of the portion to cover the insulating coverings 12b and 13b of the cables 12 and 13, and the interfaces of the sheaths 20 and 30 with the insulating coverings 12b and 13b are put in tight attachment forcedly by a pressure fastening of the rings 5 so that the interfaces are sealed watertightly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof connector used for connecting outdoor wiring such as wiring of a solar cell module.

[0002]

2. Description of the Related Art In recent years, various solar systems for general houses and business have been developed. A general solar system is constructed by connecting a plurality of solar cell modules installed on a rooftop of a building with cables, and a waterproof connector is used for the cable connection.

FIG. 16 shows the structure of a conventional waterproof connector. The waterproof connector 101 includes a pair of a plug 102 having a male terminal 121 and a receptacle 103 having a female terminal 131 into which the male terminal 121 is inserted.

The plug 102 has a male terminal 121 joined to a conductor (stranded wire) 12a of the cable 12 and an outer casing 122.
It has a structure covered by. This outer package 122
From the end of the insulation coating 12b of the cable 12 to the male terminal 1
21 to the proximal end portion, the outer peripheral portion of which extends in the distal direction so as to surround the male terminal 121, and the distal end portion of the receptacle 103 (the fitting convex portion 13 below) is provided inside the extended end.
A fitting recess 123 into which 3) is fitted is formed.

Similarly, the receptacle 103 is also a cable 1
The female terminal 131 joined to the conductor 13a of
It has a structure covered with 2. Receptacle 10
The outer casing 132 on the third side is the insulating coating 13b of the cable 13.
From the end portion of the female terminal 131 to the tip portion of the female terminal 131, and the tip portion is a fitting convex portion 133 which is fitted into the fitting concave portion 123 of the plug 102.

Then, by fitting the fitting convex portion 133 of the receptacle 103 into the fitting concave portion 123 of the plug 102, the male terminal 121 and the female terminal 131 are electrically connected, and the fitting concave portion 123 Circumferential surface and fitting protrusion 13
The outer peripheral surface of 3 is watertightly adhered, and the waterproofness to the male terminal 121 and the female terminal 131 is secured.

[0007]

By the way, for example, PVC (polyvinyl chloride) is widely used for the insulating coatings 12b and 13b of the cables 12 and 13 provided with the above-described waterproof connector.

On the other hand, the outer casing 12 of the waterproof connector 101.
A synthetic rubber material that can be appropriately elastically deformed even at a low temperature is used for the plugs 2 and 132 in order to ensure a good fit and close contact between the plug 102 and the receptacle 103. Specifically, EP (ethylene propylene) rubber is a typical material.

However, the EP rubber is molded directly on the cables 12 and 13, and the outer casings 122 and 132 are molded.
Even if is molded, it is not welded to the PVC exterior coatings 12b and 13b. Therefore, when using EP rubber,
As shown in FIG. 17, shaft parts 122a and 132a are provided in parts that are molded in the shapes of the outer casings 122 and 132 in advance, and the terminals 121 and 131 are provided in the shaft holes 122a and 132a.
A method of assembling the plug 102 and the receptacle 103 by forcibly inserting the cables 12 and 13 joined to each other is adopted.

However, in such a method, since the shaft holes 122a and 132a have to be formed slightly loose in order to facilitate the assembling work, there is a possibility that the fitting strength of the fitting portion cannot be sufficiently secured. . In addition, cable 1
Even if the surfaces of 2 and 13 have minute irregularities, the irregularities impair the adhesion of the fitting portion. In this way outer envelope 1
22, 132 and the insulation coating 12b of the cables 12, 13;
If the adhesion with 13b is impaired, it is naturally possible to allow rainwater to enter the terminals 121 and 131, and the waterproof performance of the waterproof connector will be degraded.

Further, since a considerable amount of compression set occurs in the synthetic rubber material for a long period of time, this causes the outer envelope 12
There is also a problem that the fitting strength between the cables 2 and 13 and the cables 12 and 13 is lowered from the initial level, and the waterproof performance is gradually lowered.

The present invention has been made in view of the above circumstances, and the interface between the outer cover for covering the terminal and the insulating cover of the cable is sufficiently brought into close contact with each other to provide stable waterproof performance for a long period of time. It is intended to provide a connector.

[0013]

SUMMARY OF THE INVENTION A waterproof connector of the present invention comprises a pair of a plug having a male terminal joined to a conductor of a cable and a receptacle having a female terminal joined to the conductor of another cable. In the connector, the plug is provided with a plug-side outer cover that covers at least the range from the end of the insulation coating of the cable to the base end of the male terminal, and the receptacle is a resin housing that holds the female terminal and the cable. And a receptacle-side outer casing that covers a range from the vicinity of the end of the insulating coating to the housing, and the plug-side outer casing and the receptacle-side outer casing are fitted to each other so that the male terminal and the female terminal are watertight. Connection is ensured, and pressure is applied to the outer circumference of the portion of the plug-side outer casing and the receptacle-side outer casing that covers the insulating coating of the cable. Clamping ring which can be reduced in diameter by the respectively attached, the interface between the insulating coating of the envelope body and the cable by clamping of the collar is characterized in that locked watertight manner sealed.

That is, according to the present invention, the interface between each outer package and the insulating coating of the cable is forcibly adhered with sufficient strength by the compression of the tightening ring attached to the outer periphery of each outer package forming the plug and the receptacle. It is a thing. According to the present invention, when the outer casing forming the plug and the receptacle and the insulating coating of the cable are made of materials having low adhesion to each other, or when the outer casing forming the plug and the receptacle and the insulating coating of the cable are fitted together. Even if the combined strength is low, it is possible to obtain stable waterproof performance at the interface between each outer package and the insulating coating of the cable.

The waterproof connector of the present invention is a waterproof connector comprising a pair of a plug having a male terminal joined to a conductor of a cable and a receptacle having a female terminal joined to a conductor of another cable. Is provided with an inner mold portion covering at least the range from the end of the insulation coating of the cable to the base end portion of the male terminal, and an outer mold portion covering at least this inner mold portion,
The receptacle includes a resin housing that holds the female terminal, an inner mold portion that covers at least the range from the end portion of the insulation coating of the cable to the base end portion of the housing, and at least the inner mold portion and the housing. The outer mold portion of the plug and the outer mold portion of the receptacle are fitted to each other to ensure a watertight connection between the male terminal and the female terminal, and the plug and the receptacle are Tightening rings that can be reduced in diameter by pressing are attached to the outer periphery of the portion of the outer mold portion or the inner mold portion that covers the insulating coating of the cable, and the outer mold portion or the inner mold portion is connected by the pressing of these fastening rings. The interface with the insulating coating of the cable is watertightly sealed.

That is, according to the present invention, in the case where each outer envelope forming the plug and the receptacle has a double structure of an inner mold part and an outer mold part, at least one of the inner mold part and the outer mold part is formed. The clamp ring attached to the outer periphery of the cable is forcibly brought into close contact with the interface between the mold portion and the insulating coating of the cable with sufficient strength. According to the present invention, even if the inner or outer mold portion forming the plug and the receptacle and the insulation coating of the cable are made of materials having low adhesion to each other, the interface between the molding portion and the insulation coating of the cable is reduced. The stable waterproof performance can be obtained.

In these inventions, the tightening ring may be, for example, a metal band plate which is plastically deformable and which is formed into an open ring having a substantially C-shape in side view. Such a fastening ring exerts sufficient clamping strength over a long period of time by appropriately selecting a metal material and appropriately setting the thickness and width of the strip plate. In addition, such a tightening ring,
Since it can be easily clamped by using a general-purpose crimping tool (vice clip) or a crimping tool, it is easy to assemble and can be manufactured efficiently and economically.

The waterproof connector of the present invention can be used not only for connecting the wiring of the solar cell module, but also for wiring of various outdoor electric devices such as a snow melting roof tile module and a tape heater module. .

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIG. 1 shows the structure of a waterproof connector according to a first embodiment of the present invention.
Shows the external shape of the waterproof connector of FIG. Further, FIGS. 3 and 4 show structures of a plug and a receptacle constituting the waterproof connector of FIG. 1, respectively.

The waterproof connector 1 comprises a plug 2 and a receptacle 3 which can be fitted to each other. Plug 2
The receptacle 3 and the receptacle 3 are provided at one ends of the separate cables 12 and 13, respectively. Exemplary cable 12,
13 is a conductor (stranded wire) 12a, 13a and, for example, PV
It is a uniaxial cable composed of C insulating coatings 12b and 13b.

The plug 2 includes a male terminal 21 and the male terminal 2
1 has a plug-side outer envelope body 20 that covers 1. Male terminal 21
The base end of the cable is caulked to the conductor 12a of the cable 12. The tip of the plug-side outer package 20 extends forward of the tip of the male terminal 21 so as to surround the male terminal 21, and a fitting recess 20a into which the tip of the receptacle 3 is fitted is formed inside the tip. There is. Fitting recess 20a
A protrusion 20b having a sawtooth-shaped cross section is formed on the inner peripheral surface of the in order to prevent the fitted receptacle 3 from coming off.

The plug-side outer package 20 according to this embodiment
Is molded by directly molding, for example, a synthetic rubber material made of a mixture of ethylene / propylene rubber and polypropylene on the cable 12 to which the male terminal 21 is joined. As a result, the range from the vicinity of the end portion of the insulating coating 12b of the cable 12 to the base end portion of the male terminal 21 is covered by the plug-side outer envelope body 20 without any gap.

On the other hand, the receptacle 3 has a female terminal 31 and
It has a housing 33 that holds the female terminal 31 and a receptacle-side outer envelope body 30 that covers the housing 33.
The female terminal 31 has a conductor 13a of the cable 13 at the base end thereof.
And a substantially cylindrical housing 33
It is held inside so that it cannot be pulled out. Housing 33
Is a molded product made of, for example, nylon or urethane resin, and has an opening 3 into which the male terminal 21 of the plug 2 is inserted.
3a. The receptacle-side outer package 30 is formed so that its tip is aligned with the tip of the housing 33, and this tip portion is a fitting convex portion 30a fitted into the fitting concave portion 20a of the plug 2. On the outer peripheral surface of the fitting convex portion 30a, in order to prevent the fitting convex portion 30a from coming off from the plug 2, a ridge 30b having a sawtooth-shaped cross section is formed.

The receptacle-side outer package 30 according to this embodiment is similar to the plug-side outer package 20 in a state in which the female terminal 31 is joined to the cable 13 in advance and the housing 33 is fitted on the female terminal 31. It is molded by directly molding the synthetic rubber material. As a result, the range from the vicinity of the end of the insulating coating 13b of the cable 13 to the entire outer peripheral surface of the housing 33 is the receptacle-side outer package 3.
It is covered with 0 without a gap.

In this waterproof connector 1, An interface between the plug-side outer package 20 and the insulating coating 12b of the cable 12,
In order to firmly adhere the interfaces between the receptacle-side outer package 30 and the insulating coating 13b of the cable 13,
The portions of the outer envelopes 20 and 30 that cover the insulating coatings 12b and 13b of the cables 12 and 13 are clamped by a tightening ring 5 wound around the outer periphery thereof. Tightening ring 5
Is a strip plate made of a metal such as aluminum alloy, brass, copper, or chrome-plated steel that is relatively resistant to rust and easily plastically deformed, and is formed into an open annular shape having a substantially C-shape in side view as shown in FIG. 5, for example. Is. The fastening ring 5 is put on the outer circumferences of the outer casings 20 and 30 and the diameter thereof is reduced so as to be caulked by using a crimping tool or the like.
Tighten 0 and 30 all around. As a result, the insulating coatings 12 of the outer envelopes 20 and 30 and the cables 12 and 13 are formed.
The interfaces with b and 13b are watertightly sealed.

<Second Embodiment> FIG. 6 shows the structure of a waterproof connector according to a second embodiment of the present invention, and FIGS. 7 and 8 are a plug and a receptacle constituting the waterproof connector of FIG. 6, respectively. The structure of is shown. The external shape of the waterproof connector according to this embodiment is almost the same as the external shape of the first embodiment shown in FIG.

This waterproof connector 1 is not a method of directly molding the outer casings 20 and 30 on the plug side and the receptacle side of the waterproof connector 1 of the first embodiment onto the cables 12 and 13 and the terminals 21 and 31, respectively. ,
It is molded as a separate part in advance, and the molded product has terminals 21,
It is assembled by a method of fitting the cables 12 and 13 to which 31 is joined.

In this embodiment, the male terminal 21 of the plug 2 is fitted in the plug-side outer package 20 while being held by the housing 23 made of nylon or urethane resin. The housing 23 is a plug-side outer envelope 2
It is used to firmly hold the male terminal 21 when the male terminal 21 is fitted into the 0.

When such an assembling method is adopted, the outer envelope bodies 20 and 30 and the cables 12, which are prepared as molded articles,
13 and terminals 21 and 31 are not in close contact with each other (void 2
0c, 30c) occurs. However, even in this case, a fastening ring 5 is attached to the outer periphery of the portion of the outer casings 20 and 30 that covers the insulating coatings 12b and 13b of the cables 12 and 13, and the outer casings 20 and 30 are tightened to thereby tighten the outer casings. Insulation coatings 12b on the bodies 20, 30 and the cables 12, 13;
The interface with 13b can be sealed in a watertight manner.

<Third Embodiment> FIGS. 9 to 11 show the structure of a plug of a waterproof connector according to a third embodiment of the present invention.

In this plug 2, the plug-side outer casing 20 is
It is composed of two parts divided in the axial direction, that is, a terminal holder 26 and a cable holder 27.

The terminal holder 26 located on the tip side is shown in FIG.
As shown in FIG. 0, the male terminal 21 is formed integrally with the male terminal 21 by insert molding. The base of the terminal holder 26 holds the middle portion of the male terminal 21 in a close contact state, and the outer peripheral surface of the terminal holder 26 can be fitted in a watertight manner with the tip of the cable holder 27. The tip of the terminal holder 26 surrounds the male terminal 21 so that the male terminal 2
A fitting concave portion 20a is formed to extend forward of the tip of the No. 1 and to which the tip of a not-shown receptacle is fitted. A protrusion 20b is provided on the inner peripheral surface of the fitting recess 20a to prevent the fitted receptacle from coming out.
Are formed.

The cable holder 27 located on the base end side is
It is preliminarily molded as a separate part and fitted to the cable 12. The illustrated cable 12 is a so-called CV cable, which is an inner insulator (core) 1 made of cross-linked polyethylene.
2c and an outer insulating coating (sheath) 12 made of PVC
and b are formed coaxially. However, the cable 12 may be the same as the cable 12 having the one-layer insulation coating 12b shown in the first and second embodiments.

The cable holder 27 is a cylindrical part having a shaft hole 27a into which the cable 12 can be forcibly inserted, and the opening at the tip is the base of the terminal holder 26. It can be fitted in a watertight manner.

The plug 2 is assembled in the following procedure. First, the male terminal 21 and the terminal holder 26 are previously integrated by insert molding. Next, the cable 12 is forcibly inserted into the shaft hole 27 a of the cable holder 27, and the conductor 12 a of the cable 12 is inserted into the tip end side of the cable holder 27. Then, the base end portion of the male terminal 21 integrated with the terminal holder 26 is caulked to the conductor 12a of the cable 12. Then, the cable holder 27
Is moved to the tip side, and the cable holder 27 and the terminal holder 26 are fitted together. In this way, at the tip of the cable 12,
A plug-side outer envelope body 20 that covers the male terminal 21 is formed.

Also in the plug 2 having such a structure, the tightening ring 5 is attached to the outer periphery of the portion where the cable 12 is fitted in the cable holding body 27, and the tightening ring 5 is pressed to tighten the cable holding body. The interface between 27 and the insulating coating 12b of the cable 12 can be sealed in a watertight manner. The tightening ring 5 may be loosely inserted in the cable 12 prior to the assembling work.

Although the present embodiment has been described with reference to the plug 2, the same structure can be applied to the mating receptacle.

<Fourth Embodiment> FIG. 12 shows a fourth embodiment of the present invention.
1 shows the structure of the waterproof connector according to the embodiment of FIG.
3 and 14 show the structures of the plug and the receptacle constituting the waterproof connector of FIG. 12, respectively.
The external shape of the waterproof connector according to this embodiment is also
It is almost the same as the external shape of the first embodiment shown in FIG.

The waterproof connector 1 includes the plug-side outer package 20 and the receptacle-side outer package 3 in the first embodiment.
0 has a double molding structure composed of inner mold portions 24 and 34 and outer mold portions 25 and 35, respectively.

The inner mold portion 24 of the plug 2 covers the range from the vicinity of the end of the insulating coating 12b of the cable 12 to the base end of the male terminal 21 in a tubular shape. The inner mold portion 24 is the cable 1 to which the male terminal 21 is joined in advance.
2 is molded by directly molding a synthetic resin material. When the insulating coating 12b of the cable 12 is, for example, general PVC, when a synthetic resin material such as a polyethylene elastomer is selected as the molding material, both are welded by heating during molding and good adhesion is obtained. To be On a part of the outer peripheral surface of the inner mold portion 24, an annular undulation 24a having a mountain-valley cross section is formed in order to enhance the adhesion with the outer mold portion 25.

The outer mold portion 25 of the plug 2 cylindrically covers the outer peripheral surface of the inner mold portion 24 and the vicinity of the end of the insulating coating 12b not covered by the inner mold portion 24. The tip of the outer mold portion 25 extends forward of the tip of the male terminal 21 so as to surround the male terminal 21, and a fitting recess 20a into which the tip of the receptacle 3 is fitted is formed inside thereof. . A protrusion 20b having a saw-tooth cross section is formed on the inner peripheral surface of the fitting recess 20a in order to prevent the receptacle 3 to be fitted from coming out.

The outer mold portion 25 is formed by injection molding of a synthetic rubber material made of, for example, a mixture of ethylene / propylene rubber and polypropylene. Such a synthetic rubber material is excellently welded to the inner mold portion 24 made of, for example, the polyethylene elastomer. However, the insulating coatings 12b of the cable 12 made of PVC are not sufficiently welded due to their mutual material characteristics, and the interface can be separated.

On the other hand, in the receptacle 3, the female terminal 31 joined to the cable 13 has a substantially cylindrical housing 3
It is held inside 3 so that it cannot be pulled out. The inner mold portion 34 of the receptacle 3 cylindrically covers a range from the vicinity of the end of the insulating coating 13b of the cable 13 to the substantially half of the housing 33 on the base end side. Like the inner mold portion 24 of the plug 2, the inner mold portion 34 is also formed by directly molding a synthetic resin material such as a polyethylene elastomer. Further, as in the inner mold portion 24 of the plug 2, an annular undulation 34a having a mountain-valley cross section is formed on a part of the outer peripheral surface of the inner mold portion 34.

The outer mold portion 35 of the receptacle 3 is
The outer peripheral surface of the inner mold portion 34 and the inner mold portion 3
The vicinity of the end of the insulating coating 13b not covered by 4 and the substantially half of the front side of the housing 33 are cylindrically covered. The outer mold portion 35 has its tip at the housing 33.
Is formed so as to be aligned with the tip of the plug, and this tip is fitted into the fitting recess 20a of the plug 2
Has become. On the outer peripheral surface of the fitting convex portion 30a, the plug 2
To prevent slipping out of the ridge 30b having a sawtooth-shaped cross section
Are formed.

Like the outer mold portion 25 of the plug 2, the outer mold portion 35 is also formed by injection molding of a synthetic rubber material made of, for example, a mixture of ethylene / propylene rubber and polypropylene. As a result, it is welded well by heating during molding. However, the insulation coating 13b of the cable 13 made of PVC is not sufficiently welded, and the interface can be separated.

As described above, in the waterproof connector 1 according to this embodiment, the plug 2 and the receptacle 3 have the inner mold portions 24 and 34 and the outer mold portions 25 and 35, respectively.
It has a double-molded structure covered with. Therefore, for example, by molding the inner mold portions 24 and 34 with a synthetic resin material having excellent strength and the outer mold portions 25 and 35 with a synthetic rubber material having excellent elasticity, the cable 1
Terminal 2 against impact and bending stress applied to 2, 13
It is possible to increase the protection strength of the wires 1 and 31 and at the same time increase the fitting strength between the plug 3 and the receptacle 3.

However, as described above, depending on the selection of the material for molding the inner mold parts 24, 34 and the outer mold parts 25, 35, either of the mold parts and the insulating coatings 12b, 13b of the cables 12, 13 may be formed. In some cases, they may not adhere sufficiently. Therefore, in the present embodiment, in order to ensure the waterproofness at the interfaces between the inner mold parts 24 and 34 and the cables 12 and 13, the inner mold parts 24 are formed prior to the molding of the outer mold parts 25 and 35. , 34 are attached to the outer circumferences of the inner and outer molds 24, 34 and the cables 12, 13
And are partially adhered. Thereby, even if water invades from the interface between the outer mold parts 25, 35 and the cables 12, 13, it is possible to prevent further infiltration of the water in the vicinity of the base ends of the inner mold parts 24, 34. You can In this way, each molded part and cable 1
It is possible to ensure a certain waterproof performance regardless of the materials 2 and 13.

<Fifth Embodiment> FIG. 15 shows the fifth embodiment of the present invention.
3 shows a structure of a waterproof connector according to the embodiment of FIG.

The waterproof connector 1 is similar to the waterproof connector 1 according to the fourth embodiment in that the plug-side outer package 20 is provided.
The receptacle-side outer envelope body 30 has a double-molded structure including inner mold portions 24 and 34 and outer mold portions 25 and 35, respectively.

However, in the present embodiment, the tightening ring 5 for pressing the outer casings 20 and 30 against the cables 12 and 13 is attached to the outer periphery of the outer mold portions 25 and 35. In the illustrated example, the tightening ring 5 is attached at a position where the outer mold portions 25, 35 and the inner mold portions 24, 34 overlap with each other, but the outer mold portions 25, 35 closer to the base end portion are attached to the inner mold portions. 24,
It may be attached to the outer periphery of a portion that does not overlap 34.

The tightening ring 5 as described above naturally follows the inner mold portions 24 and 34 and subsequently the outer mold portions 25 and 35.
Is attached after molding. With this configuration as well, similar to the waterproof connector 1 according to the fourth embodiment, the interfaces between the outer casings 20 and 30 and the cables 12 and 13 can be partially brought into close contact with each other to ensure a certain waterproof performance. .

[0053]

As described above, the waterproof connector of the present invention has an outer envelope body forming a plug and a receptacle,
Alternatively, when the outer envelope body has a double structure of an inner mold portion and an outer mold portion, either the inner or outer mold portion is clamped by a clamp ring attached to the outer periphery thereof,
Since it is configured to be watertightly adhered to the insulating coating of the cable, it is possible to obtain stable waterproofing performance for a long period of time at the interface between the outer casing or the mold portion and the insulating coating of the cable.

Therefore, even when the outer casing of the plug and the receptacle is directly molded on the cable, or when the plug and the receptacle are assembled by forcibly inserting the terminals and the cables into the parts molded in advance in the shape of the outer casing, the outer casing is assembled. Regardless of the material of the body and cable,
A certain level of waterproof performance can be secured. This allows
The degree of freedom in selecting materials for the outer package and cable will also be expanded.

Further, the waterproof connector of the present invention is easy to assemble because the outer package body and the cable are firmly brought into close contact with each other only by applying a tightening ring to the outer package body which covers the cable and pressing it. Can be manufactured economically and economically.

Furthermore, in the waterproof structure according to the present invention, even for a waterproof connector having terminals of two or more poles, by appropriately selecting a portion of the outer casing that covers the cable and tightening the portion with a tightening ring. , Easily applicable.

[Brief description of drawings]

FIG. 1 is a sectional view showing a structure of a waterproof connector according to a first embodiment of the present invention.

FIG. 2 is a side view showing the external appearance of the waterproof connector of FIG.

FIG. 3 is a cross-sectional view showing the structure of a plug in the waterproof connector of FIG.

FIG. 4 is a sectional view showing the structure of a receptacle in the waterproof connector of FIG.

FIG. 5 is a perspective view showing an embodiment of a tightening ring in the waterproof connector of the present invention.

FIG. 6 is a sectional view showing a structure of a waterproof connector according to a second embodiment of the present invention.

7 is a cross-sectional view showing a structure of a plug in the waterproof connector of FIG.

8 is a sectional view showing the structure of a receptacle in the waterproof connector of FIG.

FIG. 9 is a sectional view showing the structure of a plug in a waterproof connector according to a third embodiment of the present invention.

10 is an exploded cross-sectional view showing a method of assembling the plug of FIG.

FIG. 11 is an exploded side view showing the method for assembling the plug of FIG.

FIG. 12 is a sectional view showing a structure of a waterproof connector according to a fourth embodiment of the present invention.

13 is a cross-sectional view showing the structure of a plug in the waterproof connector of FIG.

14 is a sectional view showing the structure of a receptacle in the waterproof connector of FIG.

FIG. 15 is a sectional view showing a structure of a waterproof connector according to a fifth embodiment of the present invention.

FIG. 16 is a sectional view showing the structure of a conventional waterproof connector.

FIG. 17 is a cross-sectional view showing another structure of the conventional waterproof connector.

[Explanation of symbols]

1 Waterproof connector 12 cables 12a conductor 12b insulation coating 13 cables 13a conductor 13b insulation coating 2 plugs 20 Plug side outer package 21 Male terminal 23 housing 24 Inner mold part 25 Outer mold part 3 receptacle 30 Receptacle side outer envelope 31 female terminal 33 housing 34 Inner mold part 35 Outer mold part

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Satoshi Okui             1000-28 Otani, Okamoto-cho, Kusatsu-shi, Shiga Gyoda             Electric wire Co., Ltd. Kusatsu factory F term (reference) 5E087 EE06 FF04 FF07 FF14 GG06                       HH02 LL02 LL12 MM05 MM14                       QQ06 RR12 RR21

Claims (3)

[Claims] 1. A waterproof connector comprising a pair of a plug having a male terminal joined to a conductor of a cable and a receptacle having a female terminal joined to a conductor of another cable, wherein the plug is at least an insulating coating of the cable. Is equipped with a plug-side outer cover that covers the range from the vicinity of the end of the male terminal to the base end of the male terminal, and the receptacle is made of a resin housing that holds the female terminal and from the vicinity of the end of the insulation coating of the cable to the housing. And a receptacle-side outer casing that covers the range of the plug-side outer casing, the plug-side outer casing and the receptacle-side outer casing are fitted to each other to secure a watertight connection between the male terminal and the female terminal, and the plug side A tightening ring that can be reduced in diameter by pressing is provided on the outer circumference of the portion of the outer covering and the receptacle-side outer covering that covers the insulation coating of the cable. Ri attached, the waterproof connector, characterized in that the interface between the insulating coating of the respective envelope body and the cable is sealed watertight manner sealed by clamping these clamping rings. 2. A waterproof connector comprising a pair of a plug having a male terminal joined to a conductor of a cable and a receptacle having a female terminal joined to a conductor of another cable, wherein the plug is at least an insulating coating of the cable. An inner mold part covering the range from the end part to the base end part of the male terminal, and an outer mold part covering at least the inner mold part, and the receptacle is a resin housing for holding the female terminal, At least an inner mold portion covering a range from an end portion of an insulating coating of a cable to a base end portion of the housing, and an outer mold portion covering at least the inner mold portion and the housing, and an outer mold portion of the plug. And the outer mold part of the receptacle are fitted together to form a watertight connection between the male and female terminals. At the same time, the plug and the receptacle are provided with tightening rings that can be reduced in diameter by press-fitting on the outer periphery of the portion of the outer mold part or the inner mold part that covers the insulating coating of the cable, respectively. A waterproof connector, wherein an interface between the outer mold portion or the inner mold portion and an insulating coating of a cable is watertightly sealed by tightening. 3. The waterproof connector according to claim 1, wherein the tightening ring is formed by forming a plastically deformable metal strip into an open ring having a substantially C-shape in a side view.