JPH0421263Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a waterproof connector that houses connection terminals used for electrical wiring in automobiles, etc., and has improved waterproofness against high-pressure water pressure from the outside. .

[Conventional technology]

FIG. 4 is an exploded perspective view showing a conventional waterproof connector, which includes a waterproof plug 3 into which the electric wire 2 connected to the connecting terminal 1 is fitted, a housing 4 having a terminal housing chamber 6 into which the waterproof plug 3 is press-fitted; and the housing 4
It is constituted by a rear holder 5 that engages with the end of the connecting terminal 1 to prevent the connecting terminal 1 from coming off.

That is, the waterproof plug 3 made of a rubber material is provided with a plurality of (two in the figure) protrusions 7 on its outer circumferential surface with a diameter larger than the inner diameter of the terminal storage chamber 6 of the housing 4. An inner diameter portion smaller in diameter than the diameter is provided through the hole.

Further, the housing 4 is molded from synthetic resin, has a plurality of (six in the illustration) terminal accommodating chambers 6 arranged in a row, and has an outer wall extending on the opening side to form a rear holder accommodating chamber 10. A rear holder 5 having a wire insertion hole 12 in a locking window 8 and a positioning groove 9 provided on the circumferential wall of the accommodation chamber engages a locking protrusion 14 and a positioning protrusion 15 in the locking window 8 and positioning groove 9, respectively. They are installed together.

To connect the connecting terminal 1 to the connector configured as described above, the electric wire 2 is inserted into the inner diameter of the waterproof plug 3,
The connection terminal 1 is connected to the end of the electric wire 2 by crimping, and the front part of the waterproof plug 3 is crimped and fixed to the rear part of the connection terminal 1, and then press-fitted into the terminal accommodating chamber 6 of the housing 4. That is, the press-fitted waterproof plug 3 prevents water from entering the terminal accommodating chamber 6.

In the connector with the above structure, the waterproof plug 3 prevents rainwater from entering, but when the water force from a high-pressure car wash is applied, the waterproof plug 3 elastically deforms in the longitudinal direction and the electric wire 2 and the inner diameter of the waterproof plug 3,
Alternatively, there is a drawback that a gap is created between the terminal accommodating chamber 6 and the outer periphery of the waterproof plug 3, allowing water to enter the terminal accommodating chamber 6 and adversely affecting the connection terminal 1 and the like.

[The problem that the idea aims to solve]

The present invention prevents water from directly hitting the waterproof plug 3 and prevents water from entering the terminal housing chamber 6 when a high-pressure water force from an automobile high-pressure car wash is applied to the connector equipped with the waterproof plug 3. The purpose is to provide a waterproof connector that can prevent

[Means to solve the problem]

In order to achieve the above object, the present invention provides a waterproof connector in which a waterproof plug through which an electric wire is inserted is fitted into a terminal accommodating chamber. The above-mentioned sealing member has an electric wire insertion portion formed by overlapping the notched or cut tip portions, has an electric wire insertion hole penetrating through the electric wire insertion portion, and has an arcuate seal lip portion on the inner peripheral edge of the electric wire insertion hole. A structure is adopted in which the waterproof plug is arranged opposite to the outer end surface of the waterproof plug.

[Effect]

To assemble the waterproof connector with the above configuration, as shown in FIG.
After press-fitting the wire into the connector, seal the wire with sealing member 1.
Electric wire insertion part 1 between seal lip parts 23 and 24 of 8
9 from the side and into the wire hole 22, and in this state, the seal member 18 is attached to the connector.

In this state, when a water force from a high-pressure car washer or the like is applied, the seal member 18 causes the tips of the wire insertion portions 19 to overlap each other, and the wires are sandwiched between the seal lip portions 23 and 24 to bring them into close contact.
The impact of the water is received to prevent the water from directly hitting the waterproof plug 3, thereby preventing the waterproof plug 3 from being deformed and thereby preventing water from entering.

〔Example〕

FIG. 1 is an exploded perspective view showing the waterproof connector of the present invention, and FIG. 2 is a sectional view showing the seal member 18 of FIG. 1 attached to the rear holder 5.

In this embodiment, in addition to a housing 4 having the same configuration as the conventional example and a waterproof plug 3 press-fitted into the terminal accommodating chamber 6 of the housing 4, a seal member for water hammer cushioning is provided on the base surface 17 of the rear holder 5. 18 is attached to the rear holder A with a seal.

The seal member 18 is attached to the base surface 17 of the rear holder 5.
It is composed of an outer seal part 20 stuck on the opposing side 11 and an inner seal part 21 having a fixing convex part 25 stuck on the compartment side 13,
The inner and outer seal parts 20 and 21 are formed with seal lip parts 23 and 24 having a wire hole 22 at their tips, and are overlapped in a state that covers the wire insertion opening 12 of the rear holder 5 in an arch shape. Further, the overlapping portion has a wire insertion portion 19 for inserting the wire from the side.
is provided facing the wire insertion opening 12 of the rear holder.

To assemble the waterproof connector configured as described above, first, as in the conventional case, connect the connecting terminal 1 into the terminal accommodating chamber 6, and insert the waterproof plug 3 into which the electric wire 2 is inserted into the terminal accommodating chamber 6 of the housing 4. Press fit into.

Next, insert the electric wire 2 into the electric wire insertion hole 12 of the rear holder 5.
The wire is passed through the wire insertion portion 19 between the upper seal lip portion 23 and the lower seal lip portion 24 of the seal member 18 from the opening side of the wire, and is sequentially inserted through the wire hole 22 on the back side.

Finally, the locking protrusion 14 and positioning protrusion 15 of the rear holder 5 are engaged with the locking window 8 and positioning groove 9 provided in the rear holder storage chamber 10 of the housing 4 to complete the installation of the rear holder A with a seal. do.

The above embodiment uses the rear holder 5 which is a double locking mechanism for the connection terminal 1, but in addition to the rear holder A with a seal having the above structure, a seal member is used as shown in FIG. The rear holder 18' and the rear holder 5' are integrally molded from a flexible synthetic resin or rubber member, and the rear holder can be assembled to the housing as a cap body.

That is, an outer seal part 20' having a wire hole 22' and an inner seal part 21' are integrally formed in the rear holder 5', and the locking window 8' is engaged with the locking protrusion 14' of the housing 4'. It is installed.

Here, 3' is a waterproof plug, 19' is an electric wire insertion part, and 2
3' and 24' are seal lip parts.

[Effect of idea]

As described above, the present invention allows the electric wire 2 to be easily inserted through the sealing member 18 after the connector is assembled, and is able to withstand the water force of a high-pressure car washer or the like for automobiles.
The sealing member 18 causes the tips of the wire insertion portions 19 to overlap each other, and the wire is inserted into the seal lip portion 2.
3 and 24 are sandwiched and brought into close contact with each other to absorb the impact of water and prevent water from directly hitting the waterproof plug 3, so that the waterproof plug 3 can maintain its sealing performance without being deformed. Therefore, there is no intrusion of water into the inside of the terminal accommodating chamber 6 of the housing 4, and there is a great effect that poor conduction of electricity and rusting of the connection terminals etc. can be prevented.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the waterproof connector of the present invention, Fig. 2 is a sectional view showing the sealing member shown in Fig. 1 attached to a rear holder, and Fig. 3 is another embodiment of the invention. FIG. 4 is an exploded perspective view showing a conventional waterproof connector. 1... Connection terminal, 2... Electric wire, 3, 3'... Waterproof plug, 4, 4'... Housing, 5, 5'... Rear holder, 6... Terminal storage chamber, 18, 18'...
Seal member, 19, 19'...Wire insertion portion, 22,
22'...Wire hole, 23, 24, 23', 24'...
...Seal lip part.

Claims (1)

[Scope of utility model registration request] In a waterproof connector in which a waterproof plug through which an electric wire is inserted is inserted into a terminal housing chamber, the center of the arch-curved seal part is notched or cut from the side, and the notched or cut tips are overlapped to insert the electric wire. A sealing member having an electric wire insertion hole penetrating through the electric wire insertion portion and an arcuate seal lip portion at the inner peripheral edge of the electric wire insertion hole is disposed opposite to the outer end surface of the waterproof plug. A waterproof connector characterized by: