JPH03691Y2 - - 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 a failure from occurring, there is a method of providing a rear holder at the rear end of the housing to prevent the waterproof plug from coming off, but this does not improve the difficulty of inserting the waterproof plug. Furthermore, in order to easily and reliably insert the terminal and the waterproof plug, the present applicant has developed at least a locking frame having a structure in which the pressing part and the base part are connected by a connecting rod. A rubber plug is integrally provided so as to leave a pressing surface of the pressing portion and have an outer circumferential portion larger in diameter than the pressing portion and the base portion, and a wire insertion hole is formed in the rubber plug within the pressing portion and the base portion. A separate utility model registration application has been filed for a waterproof plug for a connector that is characterized by
60-133587). The present invention attempts to further improve this.

Problems to be Solved As mentioned above, the purpose of the present invention is to more economically realize a waterproof connector that facilitates the insertion of waterproof plugs and terminals, can be held securely, and is less likely to malfunction. It is a purpose.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention includes a terminal made of a soft elastic material that is inserted into a rear end opening of a housing into which a terminal to which an electric wire is fixed by caulking is inserted and held. To provide a waterproof plug including a cylindrical part extending in front thereof which can be brought into close contact with a wire sheath, and a rigid reinforcing frame body buried toward the front from at least the rear end, and preventing the waterproof plug from escaping. This electrical connector is formed by inserting a locking type rear holder for use in the waterproof plug, and employs a structure in which an electric wire is caulked and fixed to the terminal via a soft cylindrical portion of the waterproof plug.

Therefore, since the electric wire, terminal, and waterproof plug can be inserted and locked in place from the rear end opening of the housing all at once, not only the waterproof function is reliably exhibited, but also the assembly is easier. By penetrating the reinforcing skeleton from the rear end to the front end of the waterproof plug, assembly can be made more securely.

Embodiment FIG. 1 shows a sectional view of an example of the waterproof connector of the present invention. 1 is a housing, 2 is a terminal, 3 is an electric wire, and a wire caulking part 2 is provided at the rear of the terminal 2.
It is fixed by caulking with a. The part of the electric wire 3 that continues to the terminal 1 is penetrated by the electric wire 3 and a waterproof plug 5 is installed.
is provided and fitted into the rear end opening of the housing 1. Further, behind the waterproof plug 5, a rear holder 4 has a through hole 4a through which the electric wire 3 can pass, and an engaging claw 4 is inserted into the engaging hole 1b provided near the rear end of the housing 1.
b is engaged and fitted.

As shown in FIG. 2, the waterproof plug 5 of this example is made of a soft elastic material such as rubber, and has a through hole 5c in its center for passing an electric wire through, and has an electric wire 3 at its front end. A plug part 5a has a protruding cylindrical part 5b that can be brought into close contact with the outer surface of the covering, and a reinforcing skeleton made of hard synthetic resin extends from the rear end of the plug part 5a toward the front end. It is constructed by combining the body 5d. The reinforcing frame body 5d is formed of a rod-shaped portion 5e, a pressing portion 5f that connects the rear end thereof, and a projection 5g that protrudes further rearward for positioning with respect to the through hole 4a of the rear holder 4.

When assembling a connector using such a waterproof plug 5, first insert the electric wire 3 into the waterproof plug 5,
The electric wire 3 and the cylindrical part 5b are fixed together from the outside by the caulking part 2a of the terminal 2 so that the cylindrical part 5b is in close contact with the outer surface of the covering of the electric wire 3. Further, the core wire 3a is fixed by the conductor caulking portion 2b. The assembled terminal 2 is inserted through the rear end opening of the housing 1, the waterproof plug 5 is fitted, and the waterproof plug 5 is press-fitted with the rear holder 4. The positioning protrusion 5g at the rear end of the waterproof plug 5 fits into the through hole 4a of the rear holder 4, and the reinforcing frame body 5
d is pressed, and the pressing force is immediately transmitted to the wire caulking portion 2a constituting the stabilizer of the terminal 2, so that the engaging claw 4b of the rear holder 4 engages the housing 1.
At the same time as the terminal 2 is engaged with the engagement hole 1b of the lance 1a, the terminal 2 is engaged with the lance 1a, thereby achieving double engagement. Further, in the waterproof connector assembled in this manner, the waterproof plug 5 is reliably and tightly fitted into the housing 1, and the electric wire 3 and the waterproof plug 5 are also in close contact with each other, thereby exhibiting a complete waterproof function.

Effects of the invention The waterproof connector of the present invention uses a waterproof plug with a special structure as explained above, and even if the connector is assembled without taking into account the elasticity of the waterproof plug, the terminals can be securely connected. can be inserted into the housing and locked. Therefore, the ease of assembling the connector is improved, and a highly reliable waterproof connector with fewer failures can be realized.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of the waterproof connector of the present invention, and FIGS. 2a, b, and c are a left side view, a longitudinal sectional view, and a right side view, respectively, of a waterproof plug used therein.

Claims (1)

[Claims for Utility Model Registration] (1) A terminal made of a soft elastic material can be placed in the rear end opening of a housing into which a terminal with an electric wire fixed by caulking is inserted and held, and can be brought into close contact with the electric wire sheathing at the front thereof. A waterproof plug formed by extending a cylindrical part and having a rigid reinforcing frame buried toward the front from at least the rear end, and a locking type rear holder for preventing the waterproof plug from escaping are inserted. 1. A waterproof connector, characterized in that an electric wire is caulked and fixed to the terminal via a soft cylindrical portion of the waterproof plug. (2) The waterproof connector according to claim 1, wherein the reinforcing frame member extends through the cylindrical portion up to the proximal end position.