JP2529335Y2 - L-type connector plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial application field) The present invention relates to a cable plug used in a high-voltage electric device or the like, particularly to an L-type connector plug.

(Prior Art) FIG. 2 is an external view showing an example of use of a conventional L-type connector plug 11. In FIG. 2, a pair of bosses is provided on the upper surface of the housing 12 for accommodating a high-voltage device not shown in the drawing.
12a and 12a are provided. These bosses 12a have
Cable outlets to be described later are provided for the high-voltage devices in the housing 12, respectively, and the L-type connector plug is provided.
11 and 11 are mechanically connected and electrically connected to the outlet. The L-type connector plugs 11, 11 are attached to terminals of a power cable 13, such as a 22 kV high-pressure cross-linked polyethylene cable.

FIG. 3A is a partially cutaway front view of the L-type connector plug 11, FIG. 3B is a front view of an outlet of a high-voltage device in the housing not shown in FIG. 2, and FIG. FIG. 2 is an enlarged sectional view of the L-type connector plug 11 shown in FIG. In these figures, the L-shaped connection conductor 14 of the L-shaped connector plug 11 connected to the conductor of the power cable 13 is covered with an L-shaped semiconductive layer 15 made of hard rubber except for the connection rod 14a. The outer periphery of the semiconductive layer 15 is covered with an insulating layer 16. The connection rod of the L-shaped connection conductor 14 is provided on the semiconductive layer 15 and the insulation layer 16.
A conical frustoconical space 16b is provided concentrically with 14a and gradually expanding from the base end of the connecting rod 14a. Further, the insulating layer 16
Is covered with a ground-side semiconductive layer 17. A protruding ridge 17a cooperating with a concave groove 18a of a base of a cable outlet 18 described later is provided on an inner periphery of an end portion of the ground-side semiconductive layer 17 which protrudes downward from an edge of the insulating layer 16. . In the figure, reference numeral 16a denotes a wall surface of the space 16b.

The above describes the assembled state of the L-type connector plug, but it is actually assembled as follows. That is, the semiconductive layer 15, the insulating layer 16, and the ground-side semiconductive layer 17 are integrated by molding to form an insulating bushing, and L is compressed and connected to the conductor of the cable 13 from a straight opening of the insulating bushing. The main body 14b of the mold-shaped connecting conductor 14 is inserted, and the connecting rod 14a is screwed into and fixed to the tip of the main body 14b facing the truncated conical space 16b.

The cable outlet 18 is made of an insulating material, and
17a cooperating with a concave groove 18a, above which the space 16
It has an engagement portion 19 that closely engages with b. In the figure, reference numeral 19a denotes a truncated cone-shaped outer peripheral surface of the engaging portion, 19b denotes a contact provided in the engaging portion 19 and cooperating with a connecting rod 14a of the L-shaped connecting conductor 14, 1
9c is an opening through which the connecting rod 14a passes, and 19c ₁ is an engaging portion 19.
The R portion 19d on the upper end peripheral surface of each of the conductor rods is a conductor bar embedded in the engaging portion 19 and connected to a terminal of a high-voltage device (not shown).

In the conventional L-shaped connector plug having the above-described configuration, the engaging portion 19 is engaged with the space 16b of the connector plug, and the connection rod 14a of the L-shaped connection conductor 14 penetrates through the opening 19c. And the power cable 13 is connected to the high-voltage device.

(Problem to be solved by the invention) In the conventional L-type connector plug having the above configuration, the fourth
As shown in the figure, the connection rod 14a of the L-shaped connection conductor 14 is
5 and is merely screwed and fixed to the main body 14b of the connection conductor 14 connected to the cable conductor 13a by inserting the upper end screw portion 14c thereof through the opening 17b of the semiconductive layer 15. From this point, it is possible to relatively freely swing up, down, left, and right without being subjected to any restriction until it passes through the opening 19c and fits into contact with the contact 19b. Therefore, the contact
Due to the lack of the center between the two, the surface pressure was non-uniform, and mechanical and electrical inconveniences were likely to occur.

The present invention has been made based on the above circumstances, and provides an L-shaped connector plug that restrains the vertical and horizontal deflection of the connection rod 14a of the L-shaped conductor and does not cause uneven contact pressure with the contactor. It is intended to be.

[Structure of the Invention] (Means for Solving the Problems) The L-type connector plug of the present invention has a main body connected to a conductor of a cable and a connection hanging down from the tip of the main body and cooperating with a contact on a receiving side. An L-shaped connection conductor having a rod, and an L-shaped insulating bushing provided to cover the connection rod and the main body, wherein the connection rod is
It is characterized in that the connection rod is fixed to the insulating bushing via a spacer ring disposed without a gap between the base and the insulating bushing.

(Operation) In the L-shaped connector plug of the present invention having the above-described structure,
Since the base end of the connection rod is integrated with the insulating bushing via the spacer ring, the connection rod is prevented from swinging up, down, left, and right. For this reason, the center does not shift during the engagement with the contact on the receiving side, and the contact pressure at the time of contact can be made uniform.

(Embodiment) FIG. 1 is an enlarged sectional view of a main part of one embodiment of the present invention, in which the same parts as those in FIGS. 3A, 3B, and 4 are denoted by the same reference numerals. In this figure, the connecting rod 14a has a portion above the spring washer 21 longer than that of the conventional connecting rod, and the semiconductive layer 15 extends to the lower surface of the tip of the main body 14b. An opening 15b having a diameter substantially equal to that of the spring washer 21 is provided concentrically with a screw hole into which the connection rod 14a is screwed. A spacer ring 23 made of a good conductor is engaged with the connection rod 14a at a position above the flange 21. In this state, the threaded portion 1 is attached to the main body 14b.
4c is screwed in and fixed.

As a result, the proximal end of the connecting rod 14a is
This is integrated with the insulating bushing composed of the semiconductive layer 15, the insulating layer 16, and the ground-side semiconductive layer 17, and the vertical and horizontal swing of the connecting rod 14a is suppressed. Therefore, contact 19b
The center between the two will not be displaced in the arrangement with
Non-uniformity of the contact pressure at the time of contact does not occur.

In addition, this invention is not limited only to the said Example. For example, in a low-to-medium pressure cable, the semiconductive layer in contact with the L-shaped connection conductor can be omitted, and in that case, the spacer ring may be an insulator. Further, the semiconductive layer can be made of any suitable material other than the hard rubber.

[Effects of the Invention] As is apparent from the above description, in the L-type connector plug of the present invention, the contact state between the connection rod of the plug and the contact can be reduced without adding a large cost by simply adding one spacer ring. It can be significantly improved.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part of one embodiment of the present invention, FIG. 2 is an external view showing an example of use of a conventional L-type connector plug, and FIG. 3A is a partially cutaway front view of the L-type connector plug. FIG. 3B is a front view of the outlet of the high-voltage device inside the casing not shown in FIG. 2, and FIG. 4 is an enlarged sectional view of the L-type connector plug shown in FIG. 3A. 11 L connector plug, 14 L connection conductor, 14a
... connecting rod, 14b ... body, 15 ... semiconductive layer, 16 ...
Insulating layer, 17 Ground semiconductive layer, 21 Spring washer, 22 Nut, 23 Spacer ring

Claims (1)

(57) [Scope of request for utility model registration] An L-shaped connection conductor comprising a main body connected to a cable conductor, a connection rod hanging down from a tip of the main body and cooperating with a contact on a receiving side, the connection rod and the main body. And an L-shaped insulating bushing provided so as to cover the insulating bushing, wherein the connecting rod is connected to the insulating bushing via a spacer ring disposed without a gap between the base of the connecting rod and the insulating bushing. An L-type connector plug, which is fixed.