JPH0896888A - Waterproof connector plug and socket - Google Patents

Abstract

PURPOSE: To provide a waterproof connector plug compact with a high waterproofing function. CONSTITUTION: This connector plug has a cylindrical metal cover 11, an insulation body 12 laid in the hollow section of the cover 11 and contact pins 12A fitted to the body 12. Also, the plug has a cord 1 connected to the pins 12A and led out from the rear end of the metal cover 11 and a cord lead section covered with an insulation cap. In this case, the insulation cap is internally formed out of a primary molding 15 having bonding strength with the cover 11, and the external side thereof is formed out of a secondary molding 18 having bonding strength with the skin of a cord 1.

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 even outdoors exposed to wind and rain, and a mating connector socket therefor.

[0002]

2. Description of the Related Art Conventionally, waterproof connectors having various structures have been proposed. FIG. 14 shows an example thereof. The waterproof connector shown in FIG. 14 is disclosed in Japanese Utility Model Publication No. 62-53909, and is characterized in that the tubular rubber bush 2 is watertight to the cord 1 in both the plug P and the socket S. A taper surface 2A is formed on the outer circumference of the rubber bush 2, the outer diameter of which gradually increases toward the end of the cord 1. The taper surface 2A is fitted in a watertight manner to form a housing 3 , 4 are provided to cover the cylindrical covers 5 and 6, respectively, the tips of the cylindrical covers 5 and 6 are butted against each other, and a flange portion 6A is provided on one of the cylindrical covers 5 and 6, and another 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 at the tip of at least one of the cylindrical covers 5 and 6, and an O-ring 7 is fitted into this groove to form a coupling 8 By pulling the tubular covers 5 and 6 together. The O-ring 7 is sandwiched between the tips of the tubular covers 5 and 6 to obtain watertightness, and the diameter of each tapered surface 2A of the rubber bush 2 is increased at the rear end of each of the tubular covers 5 and 6 in the direction of increasing the diameter. The point is that the rubber bush 2 is pressed against the outer periphery of the cord 1 by pushing it in the opposite direction, and the tightening force provides further waterproofness.

[0003]

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

An object of the present invention is to provide a waterproof connector plug and socket which are capable of preventing water from entering from the cord side even before tightening by connecting the connector plug and the connector socket. Is.

[0005]

According to the present invention, an insulating body is attached to a hollow portion of a cylindrical metal cover, and a pin contact is supported on the insulating body, and a core wire of a cord is connected to the pin contact. In a connector plug formed by leading out from the rear end side of the metal cover and covering the leading end side with an insulating cap. It is characterized in that it is constituted by a secondary molded body which is in contact with the outer periphery of the primary molded body and the cord and is molded with a resin having an adhesive property to the outer coat of the cord.

According to the waterproof connector plug of the present invention, the primary molded body formed at the rear end side of the insulating body and the cable cover portion of the metal cover can be made of, for example, a styrene elastomer. This styrenic elastomer has adhesive force 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, according to the present invention, a secondary molded body made of vinyl chloride resin is molded over the outer periphery of the primary molded body and the outer jacket of the cord so as to have an adhesive force to the outer jacket of the cord.

As described above, according to the present invention, it is possible to form a primary molded body having a high adhesive force with respect to a metal cover, and by forming the primary molded body, the metal cover and the primary molded body can be formed with good adhesion. The waterproof performance can be obtained. Further, since the secondary molded body that is in contact with the outer cover of the cord and has an adhesive force with respect to the outer cover of the cord is formed, waterproof performance can be obtained between the outer cover of the cord and the secondary molded body. As described above, according to the present invention, a waterproof connector plug having waterproof performance can be obtained by simply 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 waterproof performance without being coupled with the mating connector socket and tightening the mutual phases.

Further, according to the present invention, a waterproof connector socket having a primary molded body and a secondary molded body is similarly constructed. Therefore, also 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. Reference numeral 11 in the drawing denotes a tubular metal cover made of metal. This cylindrical metal cover 11 has a socket engaging portion 11A for a mating connector socket formed on the tip side. As shown in FIG. 3, this socket engagement portion 11A is formed by projecting a rectangular positioning projection A and auxiliary projections B and C on the inner peripheral surface. For this purpose, in this embodiment, the tubular metal cover 11 is used.
Shall be formed by the zinc die casting method.
On the rear end side of the socket engaging portion 11A, there is a coupling engaging portion 11B protruding toward the outer periphery. The coupling 13 engages with this coupling engaging portion 11B, and the coupling 13 causes the plug P And the socket S can be attracted to each other. The outer periphery of the coupling 13 has a hexagonal nut shape, and the structure is such that it can be tightened with a tool to a mating socket. With this tightening force, the coupling engaging portion 11B pushes the packing 14, sandwiches the packing 14 with the socket, and has a structure for waterproofing the boundary surface between the connector plug P and the connector socket S.
The contact surface of the engaging portion 11B with the packing 14 is provided with a taper surface that expands outward as described later. Reference numeral 12A indicates a pin contact supported by the insulating body 12. In this embodiment, the case where five pin contacts 12A are provided is shown.

Reference numeral 15 represents a primary molded body. The primary molded body 15 is insert-molded with a resin material such as a styrene elastomer having an adhesive force to a metal. That is,
With the pin contact 12A in which the core wire of the cord 1 is connected to the insulating body 12, the primary molded body 15 with the coupling engaged with the outer periphery of the tubular metal cover 11
Insert-mold. A plurality of ordinary holes 11C penetrating from the outer peripheral surface to the inner peripheral surface are formed in the cylindrical metal cover 11 rearward of the mounting position of the insulating body 12. Therefore, the resin material injected to the outside of the cylindrical metal cover 11 enters the hollow portion of the metal cover 11 through the through hole 11C and is cured in the illustrated state. 16 is the rear end of the tubular metal cover 11 and the cord 1.
The clamp material which connects between and is shown. Here, at the 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 also filled in the concave groove 11D. By providing the groove 11D, it is possible to reinforce the strength in the sliding direction between the cylindrical metal cover 11 and the primary molded body 15, and it is possible to lengthen the invasion path of water from the outside. As a result, the waterproof performance can be improved.

On the other hand, in this embodiment, the 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 tubular metal cover 11 from leaking forward through the storage 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 preventing the pin contact 12A from coming off 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. Therefore, if the molten resin material that becomes the primary molded body 15 is pressed into the inside of the cylindrical metal cover 11 and enters, 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 attached to the protruding side of the pin contact 12A, and the diameter of the hole is reduced so that the resin material does not leak forward. It is configured in. A prismatic columnar protrusion 17A is provided on the front end side of the spacer 17, and the columnar protrusion 17A is inserted into a square hole formed in an insulating body on the socket side. It defines the direction of inclusion.

The secondary molded body 18 is adhered and formed in contact with the outer periphery of the primary molded body 15 and the outer cover of the cord 1. Secondary molded body 18
For example, an adhesive force can be obtained with the outer cover (vinyl chloride resin) of the cord 1. Mold with the same vinyl chloride resin material. The primary molded body 15 and the secondary molded body 18 form an insulating cap KP. 5 to 7 show an embodiment of the waterproof connector socket S according to the present invention. 5 to 7, reference numeral 21 denotes a tubular metal cover. This metal cover 21 is also the same as the metal cover 11 on the plug side.
It is molded by the zinc die casting method. A male screw 21A is formed at the tip of the tubular metal cover 21. The male screw 21A is screwed with a female screw formed on the inner circumference of the coupler 13 provided on the plug side, and the coupling 13 draws the tip end surface 21B of the socket S toward the packing 14.
As will be described later in detail, the distal end surface 21B is formed with a taper surface that faces rearward as it goes outward from the center, and the packing 14 is tightened by this taper surface. In addition, male screw 21A
In this example, the case where the flat surface 11C is formed facing each other by 180 ° is shown on the peripheral surface. This flat wall surface 21C uses a two-divided mold when forming the tubular metal cover 21 by a zinc die casting method. Since a burr or a discontinuous point of the screw 21A may occur at the seam of the mold, this part is cut and removed after the molding to remove the burr or the discontinuous point of the screw 21A. A hexagonal flange 21D is formed at the rear end of the male screw 21A, and this flange 21D serves as an engaging portion of a tool when the coupler 13 is tightened.

Reference numeral 22 denotes an insulating body mounted in the hollow portion of the tubular metal cover 21. A female contact 22A shown in FIG. 8 is attached to the insulating body 22. The five square holes 22B shown in FIG. 7 are female contact receiving holes for mounting the female contacts 22A. Further, as shown in FIG. 7, grooves AA, BB, CC that engage with the positioning protrusions A and auxiliary protrusions B and C formed on the metal body 11 on the plug side are formed on the outer peripheral surface of the insulating body 21. . Reference numeral 23 shown in FIG. 7 denotes an annular recess hole 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 protrusion 17A provided on the plug side. Reference numeral 25 denotes a clamp material for mechanically connecting the tubular metal cover 21 and the cord 1. The structure characteristic of the waterproof connector according to the present invention is a primary molded body 26 formed on the outer periphery of a cylindrical metal cover 21 by a styrene elastomer having an adhesive force to metal.
Is formed by insert molding, and a secondary molded body 27 formed of a vinyl chloride resin having an adhesive force with respect to the jacket of the cord 1 is formed on the outer periphery thereof.
6 and the secondary molded body 27 constitute an insulating cap KP. An annular convex strip 21E is formed on the outer periphery of the cylindrical metal cover 21 to reinforce the engagement strength of the primary molded body 26, lengthen the water entry path, and enhance the waterproof performance. Further, in the waterproof connector socket, the cylindrical metal cover 21 does not have a hole penetrating the inside and the outside. The reason is that a spacer (see FIG. 1) for contacting the socket-side insulating body 22 and closing the contact housing hole 22B formed in the insulating body 22 cannot be provided.

According to the waterproof connector socket of the present invention, even if water enters between the flange 21D and the secondary molded body 27, the metal cover 21 and the primary molded body 26 having an adhesive force are provided inside thereof. Since it is deposited on the surface of the metal cover 21, the surface of the metal cover 21 and the primary molding 2
The rear end of the metal cover 21 does not reach through the interval 6. 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 was passed through between the secondary molded body 27 and the cord 1. There is no danger of the penetrating inside the socket.

Therefore, as shown in FIG. 9, when the waterproof connector plug P and the waterproof connector socket S according to the present invention are combined, the abutting portion between the plug P and the socket S is closed by the packing 14 to be waterproof, and the cord Since the space between the first and the second molded bodies 18 and 27 is also waterproofed by the adhesive force between them, a waterproof connector having high waterproof performance can be provided with a structure almost equivalent to that of an integrally molded product.

By the way, as described above, the present invention also proposes the structure of the tightening portion of the packing 14. That is, as enlarged in FIG. 10, on the plug P side, the coupling surface of the coupling engaging portion 11B with the packing 14 is provided with a taper surface which is closer to the rear end side toward the outside, and the front end surface on the socket S side. 21B is also formed with a tapered surface that faces the rear end side from the center toward the outside. By providing the taper 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 pushed in the direction in which the taper surface is contracted by the water pressure W, so that the water pressure W cannot be increased. The higher the pressure, the stronger the pressure with which the packing 14 is brought into pressure contact with the coupling engagement portion 11B and the distal end surface 21B, and the water can be prevented from entering.

Another embodiment for effectively utilizing this effect is shown in FIGS. 11 and 12. In the embodiment shown in FIG. 11, the collars 14A and 14B are formed at both ends of the packing 14, and the collar 14
A and 14B are coupling engagement part 11B and tip surface 21B.
The packing 14 and the coupling engaging portion 11B.
And a case where the structure is such that the contact area with the front end surface 21B is large. By thus increasing the contact area, the waterproof effect can be further enhanced.

In the example of FIG. 12, a stepped portion D is provided on each taper surface, and the stepped portion D prevents the packing 14 from moving in the thickness direction according to 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 cord 1
The drawing shows the case where the drawing directions of are orthogonal. Also in this case, the primary molded body 15 is formed by surrounding the metal cover 11 with a resin material having an adhesive force with respect to the metal, and the secondary molded body 18 is formed with a resin material having an adhesive force on the outer cover of the cord 1 on the outside thereof. The structure for forming the same is the same as that of the embodiment shown in FIGS.

[0019]

As described above, according to the present invention, particularly between the plug and the socket, the cord 1 and the secondary molded bodies 18 and 27, the metal cover 11, Since 21 and the primary molded bodies 15 and 26 are waterproof, even a single plug and a single socket are waterproof, and high performance waterproof performance can be obtained. In addition, since the waterproof property can be obtained only by resin insert molding, the structure is simple and there is an advantage that it can be made small.

[Brief description of 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.

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

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

6 is a side view showing the appearance of FIG.

FIG. 7 is a front view of FIG.

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 combined state of 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 waterproof connector plug according to the present invention in a partially enlarged manner for explaining the detailed structure of the tightening portion of the packing inserted between the socket and the socket.

11 is an enlarged cross-sectional view showing a modified example of FIG.

FIG. 12 is an enlarged cross-sectional view similar to FIG.

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]

 1 Code 11,21 Metal cover 11C Through hole 11D Annular groove KP Insulation cap 12,22 Insulation body 13 Coupling 14 Packing 15,26 Primary molding 16,25 Clamping material 17 Spacer 18,27 Secondary molding

Claims (5)

[Claims] 1. A. A cylinder having a socket engaging portion formed at a front end portion for engaging with a mating socket, a coupling engaging portion behind the socket engaging portion, and a connecting portion with a cord behind the coupling engaging portion. -Shaped metal cover, and 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; A through hole formed in a joint portion of the metal cover with the cord, and D. A primary molded body formed of a resin material having an adhesive force with respect to the metal cover, filled inside the engagement portion with the cord through the through hole, and covering the joint portion with the cord; A second molded body that is formed by being attached to the outer peripheral surface of the primary molded body and is formed of a resin material that has an adhesive force to the outer jacket of the cord, and is configured to be waterproof. Connector plug. 2. A metal cover according to claim 1, wherein an annular groove is formed on a surface of the metal cover on which the primary molded body is formed, and the primary molded body is bitten into the annular groove for molding. The waterproof connector plug according to claim 1. 3. The waterproof connector plug according to claim 1, wherein a spacer having a hole for fitting with a male contact pin supported by the insulating body is mounted on the front end side of the insulating body according to claim 1. 4. An annular groove into which the socket engaging portion of any one of the waterproof connector plugs according to claim 1 is inserted is formed between the inner peripheral surface of the metal cover and the outer peripheral surface of the insulating body. , A female contact in which a contact pin supported by an insulating body of a waterproof connector plug is inserted to electrically contact the contact pin with a female contact housed in each, thereby maintaining an electrically connected state between the connector plug and the connector socket. In a connector socket having a housing hole, a cord connected to a female contact is pulled out from an end portion of a metal cover, and the pulled-out portion of the cord is covered with an insulating cap, the insulating cap is brought into contact with the metal cover to form a metal. Molded by a primary molded body with a resin material that has an adhesive force,
A waterproof connector socket, characterized in that a secondary molded body is formed by a resin material having an adhesive force to the outer surface of the primary molded body and the outer surface of the cord in contact with the cord. 5. A connector plug by inserting a packing between the coupling engagement portion according to claim 1 and the tip end surface of the metal cover according to claim 4, and tightening the coupling according to claim 1. And the connector socket to each other,
In a waterproof connector plug and socket having a structure in which the packing is tightened between the coupling engagement portion and the tip surface of the metal body forming the connector socket, the coupling engagement portion and the tip surface of the metal cover are provided with mutual contact. A waterproof connector plug and socket, characterized in that a taper surface extending outward is attached to the structure, and the packing is tightened by the taper surface.