JPS6330145Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterproof connector, and particularly to a waterproof rubber body for a connector that is fitted onto the wire connection side of a connector housing.

Generally, waterproof connectors are made by fitting female and male connector housings together through packing such as an O-ring, fitting a waterproof plug to the wire connection side of each connector housing, and inserting the terminal fitting through the wire insertion hole provided in the plug. The connector housing is configured to draw out the wires connected to the connector housing, and provides a waterproof seal on the fitting surface and the wire connection end side of each connector housing.

Conventionally, such waterproof plugs are made of natural rubber, SBR,
They are manufactured from synthetic rubber such as CR or NBR, but due to the material's high coefficient of friction, they require a large amount of force to fit into the connector housing or to pull in or pull out electric wires, making the work difficult. Also,
The insulating coating of the wire is often tightened by the narrow wire insertion hole and cracks during long-term use, making it even more difficult to pull out the wire. Furthermore, waterproof connectors are often used in harsh conditions, such as the engine compartment of a car, where temperatures change rapidly and where rainwater or splashing water can easily result in high temperatures and humidity, making them susceptible to deterioration due to heat, water vapor, etc. The disadvantage was that it was short.

The present invention has focused on the above-mentioned points, and aims to provide a waterproof rubber body for a connector that has a high waterproof effect and is easy to fit into female and male connector housings as well as to easily draw out electric wires.

The present invention will be explained below based on the drawings.

In FIG. 1, the waterproof rubber body is configured as a stopper as in the conventional case.

The plug body 9 is integrally molded from an oil-impregnated rubber material, has a plurality of insertion holes 10 for electric wires therein, and has a tapered portion 11 on its outer periphery to facilitate fitting into the connector housing 8.
Further, a plurality of annular projections 12 are provided around the tapered portion 11, and a plurality of annular projections 10 are also provided in the insertion hole 10.
a is provided around the circumference to strengthen the adhesion between the inner surface of the outer peripheral wall 8 and the electric wire 7. In this case, the electric wire 7
Since the plugs are passed through the insertion holes 10 one by one, waterproofness is improved, and since the plug body 9 is columnar, it is structurally strong.

Oil-impregnated rubber materials are made by adding oils such as animal and vegetable oils and mineral oils to rubbers such as silicone rubber, nitrile rubber, acrylic rubber, and fluorine rubber. is preferable, and correspondingly, it is desirable to use a silicone oil as the oil. Moreover, the amount of oil contained in the rubber material is 1 to
30% by weight, preferably 2-10% by weight. If it is less than 1% by weight, the friction coefficient etc. of the rubber material will not be improved and the desired effect cannot be achieved, and if it is more than 30% by weight, the moldability and physical properties of the rubber material will deteriorate, which is not preferable.

The annular projections 12, 10a of the plug body 9 are deformed by contact with the connector housing 8 or the electric wire 7, and oil oozes out.

FIG. 2 shows another embodiment of the waterproof rubber body, in which a thin skirt portion 4 covering the housing outer peripheral wall 8 is provided on the outer periphery of a plug body 9' having an annular protrusion 12 around it, and the free end thereof A reinforcing annular ring 5 is provided. In this case, the plug body 9' is inscribed in the outer circumferential wall 8, and the skirt portion 4 is in contact with the outer circumference, so that the waterproof effect is further improved.

As described above, the present invention is a waterproof body that is fitted onto the wire connection side of a connector housing and has an insertion hole for the wire, and is made of a rubber material containing 1 to 30% by weight of oil relative to the rubber. , a plurality of annular protrusions are formed on the fitting surface with the connector housing and the inner circumferential surface of the wire insertion hole, and the plurality of annular protrusions are formed on the fitting surface of the connector housing and the outer circumferential surface of the wire when fitting to the connector housing. Since the connector is deformed and the oil oozes out, it has a high waterproofing effect due to the oil film seal, and has features that it can be easily fitted into the connector housing and the wire can be easily pulled out. .

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a sectional view showing another embodiment. 8... Connector housing, 7... Electric wire, 9,
9'...Waterproof rubber body, 10...Through hole, 10a,
12...Annular process.

Claims (1)

[Scope of utility model registration request] Fits into the wire connection side of the connector housing.
The waterproof body has an insertion hole for the electric wire, and is made of a rubber material containing 1 to 30% by weight of oil to rubber, and has a plurality of annular shapes on the fitting surface with the connector housing and the inner peripheral surface of the electric wire insertion hole. A waterproof rubber for a connector, wherein a plurality of protrusions are formed, and when the connector housing is fitted, the plurality of protrusions are deformed by the fitting surface of the connector housing and the outer peripheral surface of the electric wire, and the oil oozes out. body.