JPH0524135Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a connector used for connecting electric wires and cables.

[Prior Art] As shown in FIG. 6, a female conductor connector 310 is used as a connector for connecting electric wires and cables.
A female connector piece A' having a rubber insulator 10 molded thereon, and a male connector piece A' having a plastic insulator 420 (for example, an epoxy resin insulator) molded onto a male conductor connector 410.
Those using B' are known.

Therefore, in the case of a high voltage cable, it is necessary to increase the contact surface pressure between the tapered receiving hole 131 of the female connector piece A' and the tapered protrusion 440 of the male connector piece B'. Therefore, the outer diameter of the tapered protrusion 440 of the male connector piece B' is usually made larger than the inner diameter of the tapered receiving hole 131. In this case, both connector pieces A′,
In order to ensure the connection stability of B', as shown in FIG. It is known to lock the shoulder 460 of the male connector piece B' to the shoulder 160.

[Problem to be solved by the invention] However, in such a connector, the outer diameter of the tapered protrusion 440 of the male connector piece B' is larger than the inner diameter of the tapered receiving hole 131 of the female connector piece A'. , male connector piece
When the insertion of B' into the female connector piece A' progresses to a certain extent, the middle of the tapered projection 440 comes into contact with the introduction hole 150 of the female connector piece A', so at this time there is a space e' between both connector pieces. becomes a closed space. Therefore, the air trapped in this space e′ cannot be avoided being compressed as the insertion progresses, and the increase in air pressure makes insertion difficult, and when insertion is performed at high speed, it may cause an impact. Insertion often failed due to strong repulsive force. In addition, the tapered protrusion 44
An air layer was formed at the contact interface between the tapered receiving hole 131 and the tapered receiving hole 131, resulting in a fatal decrease in voltage resistance.

In view of such circumstances, it has been proposed to provide an air vent hole or groove communicating from the outside at the maximum diameter portion of the end of the tapered receiving hole 131 of the female connector piece A'. In this way, the space e' created when inserting the male connector piece B' into the female connector piece A' does not become a sealed space, and the air trapped in the space e' is exhausted through the hole or groove. Therefore, the work of inserting both connector pieces A' and B' can be carried out smoothly.

However, if a hole or groove for air venting as described above is provided in the female connector piece A', the hole or groove must be filled with a sealing material such as one-component silicone rubber after the insertion process is completed to ensure watertightness. In addition, it is necessary to perform waterproofing treatment, which increases the number of steps and requires the sealant to be prepared separately.

Therefore, the purpose of the present invention is to propose a connector that allows smooth insertion of connector pieces, guarantees sufficient voltage resistance characteristics, and eliminates the need for waterproofing after the troublesome insertion process is completed. do.

[Means for Solving the Problems] In the connector of the present invention, the outer diameter of the tapered protruding portion of the male connector piece is made larger than the inner diameter of the tapered receiving hole of the female connector piece, and is provided with an introduction hole portion having an inner diameter slightly smaller than the maximum inner diameter of the tapered receiving hole end, and a locking stage is provided at the boundary between the introduction hole portion and the tapered receiving hole, so that the taper of the male connector piece A locking shoulder for the locking stage is present at the maximum diameter side end of the protrusion,
The locking step periphery of the female connector piece is characterized in that at least one notch is provided on the periphery of the locking step, which becomes a sealed space when the female connector piece and the male connector piece are fitted together.

[Embodiment] An embodiment of the present invention will be described in detail below based on the drawings.

FIG. 1 shows a female connector piece A according to the present invention, and shows a sectional side view of the female connector piece A attached to a cable terminal 3. In the figure, 1 is a cylindrical rubber-molded insulating reinforcing body (for example, EP rubber with a hardness of 40 to 70°) that forms the main body of the female connector piece A, and an inner part made of, for example, semiconductive EP rubber is located in the middle of the inner surface. A shield electrode 11 is provided, and this shield electrode 11
A cable insertion hole 12 is provided extending from the shield electrode 11 to one end of the reinforcing insulator 1, and a tapered receiving hole 13 is provided extending from the shield electrode 11 to the other end of the insulating reinforcing member 1.
Further, 14 is an external shield electrode made of, for example, semiconductive EP rubber. 15 is an introduction hole;
Its inner diameter is slightly smaller than the maximum inner diameter of the tapered receiving hole end 130. Reference numeral 16 denotes a locking stage of an undercut existing at the boundary between the introduction hole 15 and the tapered receiving hole 13.

2 is a notch provided on the circumference of the locking step 16. The notch 2 is formed so as to gouge the inner circumferential wall of the external shield electrode 14 across the entrance end of the tapered receiving hole 13, the locking step 16, and the non-inlet end of the introduction hole 15. As shown in FIG. 3, which is a sectional view taken along the line I--I in FIG. 1, the notches 2 are formed at four locations on the circumference of the locking step 16 at equal intervals.

3 is a cable end portion such as a cross-linked polyethylene insulated cable, and 31 is a plug-type conductor connector connected to the cable conductor 30. The female connector piece A is inserted into this cable terminal 3, and a heat-shrinkable tube 33 is placed between the connector piece A and the cable sheath 34 on the conductive rubber tape winding layer 32.
It is sealed with

FIG. 2 shows a side sectional view of the male connector piece B, which is used as a bushing for equipment.
41 is a conductor connector of male connector piece B;
A socket end 418 corresponding to the plug-type conductor connector 31 is provided. 42 is a conductor connector 41
This is a molded insulating reinforcing body made of epoxy resin or the like, and includes a tapered protruding portion 44 corresponding to the tapered receiving hole 13, a straight body portion 45 corresponding to the introduction hole 15, and the body portion 45 and the tapered protruding portion 44, there is a locking shoulder 46 for the locking step 16.
is provided. Note that 43 is a coating layer of conductive paint. The outer diameter of the tapered protruding portion 44 is larger than the inner diameter of the tapered receiving hole 13, and the body portion 4
The outer diameter of 5 is approximately the same as the inner diameter of the introduction hole 15.

Fig. 4 is a side sectional view showing a state in which female connector piece A and male connector piece B are completely fitted, and Fig. 5 is a side sectional view showing a state immediately before both connector pieces A and B are completely fitted. be. In the connector according to the present invention, since the outer diameter of the tapered protrusion 44 of the male connector piece B is made larger than the inner diameter of the tapered receiving hole 13 of the female connector piece A, the male connector piece B
When the insertion into the female connector piece A progresses to a certain extent, a space e is formed at the interface between the two connector pieces A and B, as in the conventional case. This space e is a sealed space immediately after the locking shoulder 46 of the tapered projection 44 is inserted into the introduction hole 15 of the female connector piece A, but as the insertion progresses further, as shown in FIG. When the tapered protrusion 44 is inserted until the locking shoulder 46 passes through the position of the notch 2,
Space e becomes a non-sealed space. Therefore, the air that remains in the space e immediately after the tapered protrusion 44 is inserted and has a large pressure due to being compressed as the insertion progresses is as follows.
At this point, it will be discharged to the outside through the notch 2, allowing smooth insertion.

And finally, as shown in FIG. 46 is in a locked state and both connector pieces A and B are in a completely fitted state, the notch 2 becomes a sealed space. Here, if the outer diameter of the body 45 of the male connector piece B and the inner diameter of the introduction hole 15 of the female connector piece A are made approximately the same and no surface pressure is applied to the interface, it is possible to Until the moment when the shoulder 46 falls into the locking step 16, the air that remains at the interface between the tapered protrusion 44 and the tapered receiving hole 13 is pushed out by the large surface pressure of the interface, and is pushed out by the notch 2 and the taper receiving hole 13. Body portion 45 and introduction hole portion 15
The tapered protrusion 44 and the tapered receiving hole 13 are in perfect contact with each other without any air layer. In this case, as shown in FIG. 4, after the connector pieces A and B have been fitted together, a stopper 5 is inserted around the circumference of the introduction hole 15 in order to improve locking performance and watertightness. It is preferable to tighten it further.

As shown in FIG. 3, the cutout portions 2 are provided at four locations around the locking step 16, but
The present invention is not limited to this, and the number of cutouts 2 to be formed is arbitrary, and an appropriate number may be formed as needed. However, in order to efficiently and evenly discharge the air remaining in the space e, it is desirable to provide four notches 2 at equal intervals as in this embodiment. Incidentally, since the notch 2 is formed by removing a part of the external shield electrode 14, even if a gap due to the notch 2 exists, it does not have any adverse effect on the withstand voltage characteristics of the connector.

In addition, in the above embodiment, both connector pieces A,
The insulation reinforcing bodies 1 and 42 of B can also be made of rubber. In addition, the male connector piece B is also an insertion type,
The connector of the present invention can also be used to connect cables by inserting it into another cable terminal.

[Effects] As explained above, according to the connector of the present invention,
When inserting the male connector piece into the female connector piece, the air trapped in the contact interface between both connector pieces is discharged through the notch, allowing for smoother insertion of the connector pieces than before. Compared to this, work efficiency can be improved, and since no air remains at the contact interface between the tapered protrusion and the tapered receiving hole, extremely good withstand voltage characteristics can be guaranteed.

In addition, since the above-mentioned exhaust notch becomes a sealed space when both connector pieces are mated, the watertightness does not deteriorate, and the watertightness does not require troublesome watertight processing, such as when providing an air vent hole or groove leading to the outside. There is no need to apply any
It has excellent practical effects.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing an example of a female connector piece according to the present invention, Fig. 2 is a side sectional view showing an example of a male connector piece, and Fig. 3 is a sectional view taken along line I-I in Fig. 1. , Fig. 4 is a side sectional view showing the fully fitted state of both connector pieces, Fig. 5 is a side sectional view showing the state of both connector pieces just before they are completely fitted, and Fig. 6 is a fitted state with a conventional connector. It is a side sectional view for explaining. A...Female connector piece, B...Male connector piece, 13...Tapered hole, 15...Introduction hole,
16...Locking step, 2...Notch, 44...Tapered protrusion, 46...Locking shoulder.

Claims (1)

[Scope of utility model registration request] The outer diameter of the tapered protruding part of the male connector piece is made larger than the inner diameter of the tapered receiving hole of the female connector piece, and the inlet side of the tapered receiving hole has an inner diameter that is slightly smaller than the maximum inner diameter of the tapered receiving hole end. An introduction hole is provided, a locking step is present at the boundary between the introduction hole and the tapered receiving hole, and a locking step is provided at the maximum diameter end of the tapered protrusion of the male connector piece for the locking step. A locking shoulder is present, and at least one notch is provided on the periphery of the locking stage of the female connector piece, which becomes a sealed space when the female and male connector pieces are mated. A connector characterized by: