JPH024454Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a waterproof connector for use in connecting electric wires in locations where water droplets or the like may be present.

BACKGROUND OF THE INVENTION Waterproof connectors must not only prevent liquids such as water from entering the joints between the connectors, but also have a structure that does not allow water or the like to enter the connector itself. A connector for connecting electric wires is constructed by accommodating a terminal connected to an electric wire in a cylindrical housing, but in order to make it waterproof, a housing with a sealed structure is used, and a terminal that connects the electric wire is used. It was common to seal the rear of the housing with a rubber cap or plug.

These sealing means require a two-step work process of inserting the terminal into a predetermined position within the housing and then attaching it to the rear of the housing, which is an obstacle to improving the efficiency of connector assembly work, and furthermore. It has been difficult to prevent accidents such as the terminal becoming unlatched within the housing after sealing has been completed, or to perform inspections for this purpose.

In order to improve this inconvenience, for example, according to the technology disclosed in Japanese Utility Model Publication No. 59-8298, a pin is provided to push the rear part of the terminal through a rubber plug for closing the rear part of the housing. A rubber stopper holder has been proposed. This pin ensures the attachment of the terminal and prevents it from becoming unlatched. However, when installing such a presser, great care is required in positioning the pin, and the pin is easily deformed or broken, so it cannot be said to be reliable in preventing accidents, and the workability is poor. No improvement in assembly efficiency could be expected.

Problems to be Solved The present invention can simultaneously install the terminal into the housing and seal the rear part of the housing, has a reliable effect of preventing the terminal from becoming unlatched, and has the advantage of The purpose is to provide a waterproof connector that can be easily inspected for confirmation.

Means for Solving the Problems The above-mentioned object of the present invention is to connect a plug that seals the rear opening of the housing of a waterproof connector to an annular packing receiving groove on the inner surface of a through hole through which an electric wire is passed and an annular packing receiving groove on the outer peripheral surface. Assemble a holder having a groove and a means for engaging with the housing at the rear of the outer periphery, an outer annular packing that seals between the holder and the housing, and an inner annular packing that seals between the holder and the electric wire. This is what we are trying to achieve by making it a structured system.

Embodiment FIG. 1 shows an assembled state of the waterproof connector according to the present invention, and FIG. 2 shows a plug for sealing the rear part of the waterproof connector.

The housing 1 is made of synthetic resin so that the terminal 5 can be fixed in a predetermined position by a terminal stopper 3 provided at the tip and a terminal locking arm 2 protruding from the wall surface when the terminal 5 is inserted from the rear. Thereafter, the opening can be liquid-tightly sealed by fitting the plug 7 therein.

The plug 7 includes a holder 8 having a through hole 12 in the center for passing the electric wire 6 through, an inner annular packing 10 fitted into a groove in the inner wall of the through hole 12, and the holder 8.
outer annular packing 11 fitted in a groove on the outer peripheral surface of the
It is assembled from. The holder 8 also includes a rear member 8a and a front member 8c made of synthetic resin.
It is assembled by fitting the To assemble the plug 7, first place the inner annular packing 10 for sealing between the electric wire 6 and the holder 8 inside the cylindrical portion 8b of the rear member 8a, and then housing 1 and holder 8
The outer annular gasket 11 is placed to seal the gap between the holder 8 and the plug 7. Complete.

At the rear of the outer circumference of the plug 7, there are protrusions 9, which engage with the plug locking holes 4, 4' provided in the housing 1.
9' is provided to connect the plug 7 to the housing 1.
When pushed into the rear opening, it is securely engaged and does not fall off.

The length of the plug 7 is such that it just reaches the rear end surface of the terminal 5, and when the plug 7 pushes the rear surface of the terminal and the terminal 5 is locked in place, the protrusions 9, 9' of the plug Plug locking holes 4, 4' are provided at positions such that the plugs are engaged at the same time.

To assemble such a waterproof connector, first, the electric wire 6 is passed through the through hole 12 of the holder 8, and the plug 7 is assembled, and then the terminal 5 is crimped to the tip of the electric wire 6. When the plug 7 is pushed into the rear opening of the housing 1 while inserting the terminal 5 into the housing 1, the front surface of the plug 7 presses against the rear end surface of the terminal 5.
Push the terminal 5 into position, and then release the terminal locking arm 2.
is related to the rear end of terminal 5. At this time, the engaging protrusions 9, 9' on the rear of the plug 7 fit into the plug locking holes 4, 4' of the housing, and the plug 7 is securely held in the housing, completing the waterproof connector.

Effects of the invention Since the waterproof connector of this invention is constructed as explained above, it has a simple structure and can be assembled correctly without having to pay much attention to positioning or how to apply pushing force. When the plug can be assembled and the plug can be attached to the housing, the terminal is completely locked in the housing, and no assembly failure will occur. Conversely, in order to inspect whether the terminals are incompletely fitted, it is sufficient to confirm that the plug is attached, which also has the advantage of simplifying the inspection.

In addition, because the plug does not use a rubber stopper, it can use a synthetic resin product with low molding costs and a standardized annular packing, which increases the reliability of handling during assembly and improves the efficiency of assembly work. This not only improves performance, but also reduces component costs, making it economically advantageous.

[Brief explanation of the drawing]

Figure 1 is a structural diagram of the waterproof connector according to the present invention.
Figure 2 shows the structure of the plug, where A is the front view and B is the front view.
is a sectional view thereof. 1...Housing, 4...Plug locking hole, 5...
...Terminal, 7...Plug, 9,9'...Protrusion.

Claims (1)

[Scope of utility model registration request] A connector comprising a connector housing, a connection terminal locked in the housing, and a plug for liquid-tightly sealing a rear opening of the housing, wherein the plug is accommodated in an annular packing on the inner surface of a through hole through which an electric wire is passed. A holder comprising a groove and an annular packing receiving groove on the outer peripheral surface and having means for engaging with the housing at the rear portion of the outer periphery; an outer annular packing sealing between the holder and the housing; and an outer annular packing sealing between the holder and the electric wire. A waterproof connector characterized by comprising an inner annular packing.