JP3262305B2 - Waterproof connector plug and socket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof connector plug which can be used outdoors exposed to wind and rain, and a mating connector socket.

[0002]

2. Description of the Related Art Conventionally, waterproof connectors having various structures have been proposed. FIG. 14 shows an example. The waterproof connector shown in FIG. 14 is disclosed in Japanese Utility Model Publication No. Sho 62-53909. The feature of the waterproof connector is that a cylindrical rubber bush 2 is made watertight with respect to a cord 1 in both a plug P and a socket S. A tapered surface 2A whose outer diameter gradually increases toward the end of the cord 1 is formed on the outer periphery of the rubber bush 2, and the housing 3 , 4 are provided, and the ends of the cylindrical covers 5 and 6 are abutted with each other. A flange 6A is provided on one of the cylindrical covers 5 and 6, and the other cylindrical cover (this In the example, a screw 5A is formed on the outer periphery of the end of 5), an annular groove is formed in at least one end of the cylindrical covers 5 and 6, and an O-ring 7 is fitted into this groove, and a coupling 8 is formed. By pulling the cylindrical covers 5 and 6 The O-ring 7 is sandwiched between the tips of the cylindrical covers 5 and 6 to obtain water tightness, and the diameter of each tapered surface 2A of the rubber bush 2 at the rear end of the cylindrical covers 5 and 6 is increased. The rubber bush 2 is pressed against the outer periphery of the cord 1 by being pushed in the opposite direction, and the structure is such that further waterproofness is obtained by this tightening force.

[0003]

According to the structure of the waterproof connector shown in FIG. 14, a waterproof effect can be obtained in a state where the plug P and the socket S are fitted and fastened by the coupling 8. That is, since the waterproof performance is obtained by tightening the tapered surface 2A with the cylindrical covers 5 and 6, there is an inconvenience that water enters from between the cord 1 and the rubber bush 2 before the tightening. There is.

SUMMARY OF THE INVENTION An object of the present invention is to provide a waterproof connector plug and a socket in which a connector plug and a connector socket are connected and water can be prevented from entering from the cord side even before being fastened. It is.

[0005]

According to the present invention, an insulating body is mounted in a hollow portion of a cylindrical metal cover, a pin contact is supported on the insulating body, and a core wire of a cord is connected to the pin contact. Is drawn out from the rear end side of the metal cover, and this lead end side is covered with an insulating cap. The secondary molded body is formed of a resin having an adhesive property on the outer periphery of the cord in contact with the outer periphery of the primary molded body and the cord.

According to the waterproof connector plug of the present invention, the primary molded body formed on the rear end side of the insulating body and the cable lead-out portion of the metal cover can be made of, for example, a styrene-based elastomer. According to this styrene-based elastomer, it has adhesive strength to metal. As a result, since the primary resin body is formed in close contact with the metal cover with good adhesiveness, waterproofness can be obtained between the metal cover and the primary molded body. Further, in the present invention, a secondary molded body made of a vinyl chloride resin having an adhesive force to the cord jacket is formed over the outer periphery of the primary molded body and the cord jacket.

As described above, according to the present invention, it is possible to form a primary molded body having a high adhesion to the metal cover, and to form the primary molded body with good adhesion by forming the primary molded body. Waterproof performance can be obtained. Further, since the secondary molded body having an adhesive force to the cord jacket is formed in contact with the cord jacket, waterproof performance can be obtained between the cord jacket and the secondary molded body. Thus, according to the present invention, a waterproof connector plug having waterproof performance can be obtained only by molding both the primary molded body and the secondary molded body by, for example, insert molding. As a result, it is possible to obtain a waterproof connector plug having a waterproof performance without being fastened between the mating connector sockets.

Further, in the present invention, a waterproof connector socket having a primary molded body and a secondary molded body is similarly constituted. Therefore, for this waterproof connector socket, a waterproof connector socket having high waterproof performance can be obtained for the same reason.

[0009]

FIG. 1 shows an embodiment of a waterproof connector plug according to the present invention. In the drawing, reference numeral 11 denotes a cylindrical metal cover made of metal. The cylindrical metal cover 11 has a socket engaging portion 11A with the mating connector socket on the distal end side. As shown in FIG. 3, the socket engaging portion 11A is formed by protruding rectangular positioning ridges A and auxiliary ridges B and C on the inner peripheral surface. For this purpose, in this embodiment, the tubular metal cover 11 is used.
Is formed by a zinc die casting method.
On the rear end side of the socket engaging portion 11A, there is provided a coupling engaging portion 11B protruding toward the outer periphery. The coupling 13 is engaged with the coupling engaging portion 11B, and the plug P And the socket S can be attracted to each other. The coupling 13 has a hexagonal nut shape on the outer periphery, and has a structure that can be fastened to a mating socket by a tool. With this tightening force, the coupling engaging portion 11B pushes the packing 14, sandwiches the packing 14 with the socket, and waterproofs the boundary surface between the connector plug P and the connector socket S.
The contact surface of the engagement portion 11B with the packing 14 is provided with a tapered surface that expands outward as described later. Reference numeral 12A denotes a pin contact supported on the insulating body 12. This embodiment shows a case where five pin contacts 12A are provided.

Reference numeral 15 denotes a primary molded body. The primary molded body 15 is insert-molded with a resin material having an adhesive force to a metal such as a styrene-based elastomer. That is,
A pin contact 12A in a state where the core wire of the cord 1 is connected to the insulating body 12 is attached, and furthermore, the primary molded body 15 is formed in a state where the coupling is engaged with the outer periphery of the cylindrical metal cover 11.
Is insert molded. A plurality of normal holes 11C penetrating from the outer peripheral surface to the inner peripheral surface are formed in the cylindrical metal cover 11 behind the mounting position of the insulating body 12. Therefore, the resin material injected outside the cylindrical metal cover 11 enters the hollow portion of the metal cover 11 through the through hole 11C, and is cured in the state shown in the drawing. 16 is the rear end of the cylindrical metal cover 11 and the cord 1
Fig. 3 shows a clamp member connecting between and. Here, at a position where the primary molded body 15 is to be formed, a concave groove 11D is formed in an annular shape on the outer peripheral surface of the cylindrical metal cover 11, and the primary molded body 15 is filled in the concave groove 11D. By providing the concave groove 11D, the strength in the sliding direction between the cylindrical metal cover 11 and the primary molded body 15 can be reinforced, and the path of water from the outside can be lengthened. As a result, the waterproof performance can be improved.

On the other hand, in this embodiment, a spacer 17 is arranged on the front end side of the insulating body 12. The spacer 17 is provided to prevent the primary molded body 15 that has entered the inside of the cylindrical metal cover 11 from leaking forward through the accommodation hole of the pin contact 12A formed in the insulating body 12. The details are shown in FIG. A hole 12B formed in the insulating body 12 has a tongue piece 12AA for retaining the pin contact 12A and a connecting portion 1 for crimping the core wire.
A hole having a relatively large diameter is formed to accommodate 2AB or the like. For this reason, when the molten resin material which becomes the primary molded body 15 is pressed and enters the inside of the cylindrical metal cover 11, there is a disadvantage that the resin material leaks through the hole 12B. Therefore, in this embodiment, a spacer 17 having a hole slightly larger than the diameter of the pin contact 12A is mounted on the protruding direction side of the pin contact 12A, and the resin material is prevented from leaking forward by reducing the diameter of the hole. It is what was constituted. A square columnar projection 17A protrudes from the front end side of the spacer 17, and this columnar projection 17A is inserted into a square hole formed in the insulating body on the socket side. Stipulates the direction of

A secondary molded body 18 is adhered and formed in contact with the outer periphery of the primary molded body 15 and the jacket of the cord 1. Secondary molded body 18
For example, adhesive strength can be obtained with the jacket (vinyl chloride resin) of the cord 1. Molded with the same vinyl chloride resin material. The primary molded body 15 and the secondary molded body 18 constitute an insulating cap KP. 5 to 7 show an embodiment of a waterproof connector socket S according to the present invention. 5 to 7, reference numeral 21 denotes a cylindrical metal cover. This metal cover 21 is also similar to the metal cover 11 on the plug side,
It is formed by a zinc die casting method. A male screw 21 </ b> A is formed at the tip of the cylindrical metal cover 21. The male screw 21A is screwed with a female screw formed on the inner periphery of the coupler 13 provided on the plug side, and the distal end surface 21B of the socket S is pulled toward the packing 14 by the coupling 13.
As will be described in detail later, the distal end surface 21B is formed with a tapered surface that is directed backward from the center to the outside, and the packing 14 is tightened with this tapered surface. In addition, male screw 21A
This example shows a case where a flat surface 21C is formed 180 ° opposite to the peripheral surface. The flat wall surface 21C uses a two-piece mold when forming the cylindrical metal cover 21 by the zinc die-casting method. Since burrs or discontinuous points of the screw 21A may be generated at the joint of the mold, after molding, this portion is cut and removed to remove the discontinuous point of the burr or the screw 21A. A hexagonal flange 21D is formed at the rear end of the male screw 21A, and serves as a tool engagement portion when the coupler 13 is tightened by the flange 21D.

Reference numeral 22 denotes an insulating body mounted in the hollow portion of the cylindrical metal cover 21. A female contact 22A shown in FIG. The five square holes 22B shown in FIG. 7 indicate female contact storage holes for mounting the female contacts 22A. 7, grooves AA, BB, and CC are formed on the outer peripheral surface of the insulating body 21 so as to engage with the positioning ridges A and the auxiliary projections B and C formed on the metal body 11 on the plug side. . Reference numeral 23 shown in FIG. 7 denotes an annular recess into which the socket engaging portion 11A on the plug side is inserted. Reference numeral 24 denotes a square hole that engages with the columnar projection 17A provided on the plug side. Reference numeral 25 denotes a clamp member for mechanically connecting the cylindrical metal cover 21 and the cord 1. The feature of the waterproof connector according to the present invention is that a primary molded body 26 formed of a styrene-based elastomer having an adhesive force to metal on the outer periphery of the cylindrical metal cover 21.
And a secondary molded body 27 formed of a vinyl chloride resin having an adhesive force to the jacket of the cord 1 is formed on the outer periphery thereof, and these primary molded bodies 2 are formed.
6 and the secondary molded body 27 constitute an insulating cap KP. An annular ridge 21E is formed on the outer periphery of the cylindrical metal cover 21 so as to reinforce the engagement strength of the primary molded body 26, lengthen the water intrusion path, and enhance the waterproof performance. Further, in the waterproof connector socket, a hole penetrating inside and outside is not formed in the cylindrical metal cover 21. The reason for this is that a spacer (see FIG. 1) for closing the contact housing hole 22B formed in the insulating body 22 cannot be provided in contact with the insulating body 22 on the socket side.

According to the waterproof connector socket of the present invention, even if water invades from between the flange 21D and the secondary molded body 27, the primary molded body 26 having an adhesive force with the metal cover 21 is provided inside the metal cover. 21 is formed on the surface of the metal cover 21 and the primary molded body 2.
6 does not reach the rear end of the metal cover 21. Of course, since the secondary molded body 27 formed of the same vinyl chloride resin material as the outer jacket of the cord 1 was formed on the outer periphery of the cord 1, water passed through the secondary molded body 27 and the cord 1. There is no danger of any penetration into the interior of the socket.

Accordingly, as shown in FIG. 9, when the waterproof connector plug P and the waterproof connector socket S according to the present invention are connected to each other, the mating portion between the plug P and the socket S is closed by the packing 14 to be waterproofed, and the cord is further waterproofed. Since the first and second molded bodies 18 and 27 are also waterproofed by the adhesive force therebetween, a waterproof connector having high waterproof performance can be provided by a structure substantially equivalent to an integrally molded product.

As described above, the present invention also proposes a structure of a tightening portion of the packing 14. That is, as shown in an enlarged manner in FIG. 10, the joint surface of the coupling engaging portion 11B with the packing 14 is provided with a tapered surface that is closer to the rear end side toward the outside, and the front end surface on the socket S side. 21B also forms a tapered surface that faces toward the rear end as it goes outward from the center. By providing the tapered surfaces on both the plug side and the socket side in this way, even if the water pressure W is applied from the outside, the packing 14 is pressed in the direction in which the tapered surface is contracted by the water pressure W, so that the water pressure W is increased. As the distance increases, the force with which the packing 14 is pressed against the coupling engagement portion 11B and the distal end surface 21B increases, and it is possible to prevent water from entering.

Another embodiment for making this function work effectively is shown in FIG. 11 and FIG. In the embodiment shown in FIG. 11, flanges 14A and 14B are formed at both ends of the packing 14, and these flanges 14A and 14B are formed.
A and 14B are coupled to the coupling engaging portion 11B and the distal end surface 21B.
And the packing 14 and the coupling engaging portion 11B
And a structure in which a contact area with the tip end surface 21B is large. By adopting such a large contact area, the waterproof effect can be further enhanced.

FIG. 12 shows an example in which a step D is provided on each tapered surface, and the step D prevents the packing 14 from moving in the thickness direction in accordance with the tightening force. FIG. 13 shows another embodiment of the waterproof connector plug of the present invention. In this embodiment, the plug insertion direction and the cord 1
Are shown when the drawing directions are orthogonal. Also in this case, the primary molded body 15 is formed of a resin material having an adhesive force to the metal surrounding the metal cover 11, and the secondary molded body 18 is formed of a resin material having an adhesive force on the outer cover of the cord 1 on the outside thereof. Is the same as that of the embodiment shown in FIGS.

[0019]

As described above, according to the present invention, in particular, the plug and the socket are connected to each other, and the gap between the cord 1 and the secondary molded bodies 18 and 27 and between the metal cover 11, Since the space between the primary molded body 21 and the primary molded bodies 15 and 26 is waterproof, even the plug alone and the socket alone are waterproof, and high performance waterproof performance can be obtained. Further, since waterproofness can be obtained only by insert molding of the resin, the structure is simple, and there is an advantage that it can be made small.

[Brief description of the drawings]

FIG. 1 is a sectional view for explaining an embodiment of a waterproof connector plug according to the present invention.

FIG. 2 is a side view showing the appearance of FIG.

FIG. 3 is a front view for explaining the front structure of FIG. 1;

FIG. 4 is an enlarged sectional view for explaining the structure of the insulating body used in the embodiment shown in FIG. 1;

FIG. 5 is a sectional view for explaining an embodiment of the waterproof connector socket of the present invention.

FIG. 6 is a side view showing the appearance of FIG. 5;

FIG. 7 is a front view of FIG. 5;

FIG. 8 is a perspective view showing an example of the structure of a female contact used in the waterproof connector socket according to the present invention.

FIG. 9 is a cross-sectional view for explaining a connection state between the waterproof connector plug and the socket according to the present invention.

FIG. 10 is an enlarged cross-sectional view showing a part of the packing for insertion between the waterproof connector plug and the socket according to the present invention in order to explain a detailed structure of the tightening portion;

FIG. 11 is an enlarged sectional view showing a modified example of FIG. 10;

FIG. 12 is an enlarged sectional view similar to FIG. 11;

FIG. 13 is a sectional view showing a modified embodiment of the waterproof connector plug according to the present invention.

FIG. 14 is a sectional view for explaining a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Code 11 and 21 Metal cover 11C Through hole 11D Annular concave groove KP Insulating cap 12,22 Insulating body 13 Coupling 14 Packing 15,26 Primary molded body 16,25 Clamping material 17 Spacer 18,27 Secondary molded body

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-126994 (JP, A) JP-A-2-44668 (JP, A) JP-A-62-55881 (JP, U) JP-A-1 148678 (JP, U) Japanese Utility Model Sho 62-106485 (JP, U) Japanese Utility Model Sho 57-51019 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 13/52 H01R 13 / 46

Claims (5)

(57) [Claims] 1. A. First Embodiment A tube having a socket engaging portion for engaging with a mating socket formed at a front end portion thereof, a coupling engaging portion provided behind the socket engaging portion, and a coupling portion with a cord further provided behind the socket engaging portion. A metal cover, B. B. an insulating body disposed inside the metal cover so as to straddle a part of the socket engaging portion and the coupling engaging portion; B. a through-hole formed at the joint of the metal cover with the cord; A. A primary molded body formed of a resin material having an adhesive force to the metal cover, filled into the engagement portion with the cord through the through hole, and covering the coupling portion with the cord; It is formed by deposited on the outer peripheral surface of the primary molded body, and a secondary molded body formed by resin material having an adhesive force to the jacket of the cord, F. Engage with the coupling engagement section and engage the mating socket.
And a coupling for pulling in the waterproof connector plug. 2. The metal cover according to claim 1, wherein an annular concave groove is formed on a surface on which the primary molded body is formed, and the primary molded body is formed into the annular concave groove by molding. The waterproof connector plug according to claim 1, wherein 3. The waterproof connector plug according to claim 1, wherein a spacer having a hole for fitting a male contact pin supported by the insulating body is mounted on a front end side of the insulating body according to claim 1. 4. The waterproofing device according to claim 1, wherein
An annular groove into which the socket engaging portion of the connector plug is inserted is formed between the inner peripheral surface of the metal cover and the outer peripheral surface of the insulating body, and the contact pin supported by the insulating body of the waterproof connector plug is inserted. A female contact storage hole for electrically contacting the contact pins with the female contacts stored therein and maintaining the connector plug and the connector socket in an electrically connected state, wherein the cord connected to the female contact is a metal cover. In a connector socket which is pulled out from an end portion and has a structure in which the cord lead-out portion is covered with an insulating cap, the insulating cap is formed in contact with a metal cover with a resin material having an adhesive force to a metal by a primary molding,
A waterproof connector socket, wherein a secondary molded body is formed of a resin material having an adhesive force on an outer surface of the cord in contact with the outside of the primary molded body and the cord. 5. The waterproofing device according to claim 1,
Coupling the engaging portion of the connector plug, interposed a packing between the front end surface of the metal cover of the waterproof connector socket according to claim 4, wherein said waterproof connector plug by Shimezukeru coupling according to claim 1, wherein and the waterproof connector <br/> attract each other and lighter socket, the waterproof connector plug and waterproof connector Seo Shimezukeru structure the gasket during the coupling engaging portion and the distal end surface of the metal cover <br / In the bracket, each of the coupling engaging portion and the distal end surface of the metal cover is provided with a tapered surface extending in a direction outwardly extending toward each other, and the packing is tightened by the tapered surface. waterproof connector plug and waterproof connector socket <br/> bets.