JPH0316228Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electrical connector that can be used in such environments as water droplets.

Conventional technology To make electrical connectors highly waterproof,
It is necessary to use a watertight structure as the housing, and the gap between the housing and the electric wire with a terminal inserted and fixed into the housing must also be made watertight. For this purpose, a waterproof plug through which an electric wire passes is usually fitted into the rear opening of the housing.

Waterproof plugs are made of a flexible and elastic material such as rubber to improve watertightness, but when they are pushed into the rear opening of the housing, the deformation recovers and there is backtracking, which can result in incomplete insertion of the terminal or terminal Failures such as disconnection are likely to occur. In order to prevent such failures from occurring, methods are used to prevent the waterproof plug from coming off, such as the method of providing a locking flap on the housing as disclosed in Japanese Patent Application Laid-Open No. 55-57276 (see Fig. 4). ), but it does not improve the difficulty of inserting the rubber plug, nor does it solve the problem of incomplete locking.

Problems to be Solved In response to the above-mentioned circumstances, the present invention provides a structure for a waterproof connector in which a rubber plug can be inserted reliably so that incomplete locking of terminals does not occur and terminals do not come off. This is what we are trying to provide.

Means for Solving Problems The purpose of the present invention is to insert a terminal in which a wire is fixed by a conductor caulking part and an insulator caulking part into a housing, and then fit an elastic soft waterproof plug into the opening. In this electrical connector, a cylindrical part that can be brought into close contact with the outer surface of the wire sheath is protruded from one end as a waterproof plug. This is accomplished by fixing a rigid ring around the wire sheath at the rear of the wire.

Embodiment One embodiment of the invention is shown in FIGS. 1 and 2.

Reference numeral 1 denotes a housing, and a flap 1a is provided on the outer surface via a hinge 1b so as to cover the rear open end, and a locking claw 1c for locking the flap 1a is provided in a protruding manner. There is. 1
d is a terminal locking lance.

2 is a terminal, and 3 is an electric wire, which are connected and fixed by a conductor crimped portion 2a and an insulator crimped portion 2b. 4 is a waterproof plug made of soft rubber, and the electric wire 3 passes through the center thereof. A thin cylindrical part 4a is protruded from one side of the waterproof plug 4 so that it can be brought into close contact with the outer surface of the electric wire 3 that has passed through it. In this state, they are fixed together at the insulator caulking portion 2b. Reference numeral 5 denotes a ring body made of a rigid material such as metal, and fixed by crimping or the like at a position slightly behind the waterproof plug 4 so as to be able to abut against the flap 1a.

FIG. 3a shows the relationship between the electric wire 3, the waterproof plug 4, and the ring body 5, and FIG. 3b shows the state seen from direction A in FIG. 3a. The ring body 5 here is formed by crimping a terminal on the electric wire 3 and simultaneously crimping a U-shaped piece, but Figure c shows a ring body 5' with a separate groove attached to it. show.

Terminal 2 assembled as shown in Figure 3 is
Although the terminal 2 is inserted through the rear opening of the housing 1, even if the insertion is incomplete, the ring body 5 is pushed by lowering the flap 1a provided at the rear of the housing 1, and the terminal 2 is inserted into the housing 1. pushed into. At this time, even if the electric wire 3 is flexible, the ring body 5 and the insulator crimped portion 2b of the terminal 2
Since the waterproof plug 4 is placed between the terminal 2 and the lance 1d, the terminal 2 is reliably pushed in until it engages with the lance 1d.

Effects of the invention As explained above, the waterproof connector of the present invention has a waterproof plug and a ring attached, so the elasticity of the waterproof plug allows the terminal to be securely attached even if the connector is pushed in without consideration for backtracking when assembling the connector. can do. Therefore, the workability of assembling the connector is improved, and a highly reliable waterproof connector with fewer failures is realized.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of the waterproof connector of the present invention, and FIG. 2 is an external perspective view thereof. Figure 3 is an assembly diagram of the terminal of the present invention, where a is a side front view;
b is a view seen from the direction of A in a, and c is a view seen from the same direction as b in another embodiment.
FIG. 4 is a perspective view of an example of a known connector having a flap, with a shown in the closed state and b shown in the open state.

Claims (1)

[Scope of utility model registration request] In an electrical connector in which a terminal in which a wire is fixed by a conductor caulking part and an insulator caulking part is inserted into a housing, and an elastic soft waterproof plug is fitted to the rear end opening of the housing, the waterproof plug is formed on the outer surface of the wire sheathing. A cylindrical part protruding from one end that can be brought into close contact with the waterproof plug is used, and the cylindrical part is fixed to the terminal together with the wire at the insulator caulking part, and a rigid ring is attached around the wire covering part behind the waterproof plug. What is claimed is: 1. A waterproof connector, characterized in that the ring body is fixed thereto, and the rear end of the annular body is further locked by a locking member.