JPH084702Y2 - Waterproof connector - Google Patents

Description

[Detailed Description of the Invention] "Industrial application field" The present invention inserts a terminal of an electric wire into a connector housing, and presses a rubber stopper "caulked and fixed" together with the terminal to the inner circumference of the connector housing. The present invention relates to a waterproof connector for waterproofing.

"Prior art" Conventional waterproof connectors have a terminal with a rubber plug in which a wire is inserted through the center hole of the rubber plug, and the rubber plug attachment part where the wire is inserted is crimped together with the terminal to the wire. The structure is such that it is inserted into the accommodation chamber, and at the same time as the insertion, the seal portion of the rubber plug is pressed against the inner circumference of the rubber plug insertion portion of the connector housing to waterproof.

However, in the above waterproof connector, in order to secure the sealing performance, it is necessary to take a large margin for the forced fitting between the seal part of the rubber plug and the inner circumference of the rubber plug insertion part, so that the insertion resistance of the rubber plug becomes large. Due to the insertion resistance, the electric wire may be bent or the terminal may not be inserted to the normal position and the terminal may be half-inserted, which may cause the terminal to come off during use.

An object of the present invention is to provide a waterproof connector that eliminates the above-mentioned conventional problems.

"Means for Solving Problems" The waterproof connector of the present invention for solving the above technical problems is
Behind the terminal connected to the electric wire, caulking and fixing the rubber plug of the integral body, in which the electric wire is inserted into the center hole, together with the terminal,
In a waterproof connector in which the seal portion of the rubber plug is pressed against the inner circumference of the rubber plug insertion portion of the terminal housing chamber of the connector housing, the outer diameter of the seal portion is less than or equal to the inner diameter of the rubber plug insertion portion. And a retainer having a locking mechanism for pressing the rubber plug in the posture of being inserted into the rubber plug insertion portion from the rear, and further having a locking mechanism to the connector housing. A projection receiving recess that surrounds the insertion current wire and opens rearward and has a circular arc outer periphery, and is forcibly fitted into the projection receiving recess of the rubber plug on the rubber plug facing surface of the retainer, and
Bulging protrusions having a circular arc outer circumference larger than the circular arc outer circumference are formed to face each other, and the bulging projections of the retainer are fitted into the projection receiving recesses of the rubber plug to expand the rubber plug outer diameter. It has a structure in which the retainer is locked to the connector housing.

"Operation" In the waterproof connector of the present invention having the above configuration, the outer shape of the rubber plug is intentionally formed small in consideration of the insertability of the connector housing, and the rubber plug is inserted into the terminal housing chamber of the connector housing together with the terminal. After wearing, the retainer with the above-mentioned structure is attached and locked from the rear to forcibly expand the outer shape of the rubber plug, and is pressed against the inner circumference of the rubber plug insertion part of the terminal accommodating chamber to waterproof, so the rubber plug of the rubber plug The insertability to the insertion part is greatly improved,
The improved insertability can prevent the terminal from being half-inserted.

Then, the "projection receiving recess having the circular arc outer circumference on the rubber plug side is fitted with the" bulging projection opposite to and having the circular arc outer circumference having a diameter larger than the receiving recess "on the retainer side. The outer circumference of the rubber plug bulges almost uniformly to obtain good sealing performance.

Further, since the retainer has a locking mechanism to the connector housing, the function of ensuring the waterproofness by the rubber plug swelling and the secondary locking function of preventing the terminal from coming off (the terminal has a primary locking mechanism to the connector housing). Since this retainer lock serves as a secondary lock mechanism, it has a multi-function effect, and prevents the half-insertion failure of the rubber plug by pressing the rubber plug. This can be achieved simply by pressing the retainer from the rear of the rubber stopper and locking it with the "snap" and the connector housing.

[Example] Hereinafter, an example will be described with reference to FIG. Attaching part 4 of rubber stopper 3 of one body with electric wire 7 inserted through the center hole
(Refer to FIGS. 1 (A) and (C)) is "crimped and crimped" by the crimping piece 16 of the terminal 6 which is crimped and connected to the end of the electric wire 7, and the rubber plug 3 is fixed to the rear of the terminal 6 with a rubber plug. Terminal 6
The inner circumference of the rubber plug insertion portion 15 is inserted into the terminal housing chamber 2 of the connector housing 1 and the annular seal portion 5 of the rubber plug 3 that swells after the mounting portion 4 contacts the inlet of the terminal housing chamber 2. In a waterproof connector that presses against and seals against the rubber plug, the rubber plug 3 inserted into the rubber plug insertion portion 15 is pressed to forcefully expand the seal portion 5 of the rubber plug, and the locking mechanism to the connector housing 1 is provided. The retainer 8 is provided, and the retainer 8 is pushed from the rear side of the rubber plug 3 and locked to the connector housing 1, whereby the outer diameter of the rubber plug 3 is forcibly expanded and waterproofed.

More specifically, the center portion of the seal portion 5 of the rubber stopper 3 has a circular shape that surrounds the inserted electric wire 7 and has an arc outer periphery that opens rearward (strictly speaking, a true circle is used in this embodiment). The protrusion receiving recess 9 is formed in a slightly elongated shape. The bulging protrusion 10A1 forcibly fitted into the protrusion receiving recess 9 is formed on the surface of the retainer 8 facing the rubber plug 3.
0B are arranged opposite to each other in a pair, leaving a space 11 through which the electric wire 7 is inserted, and the bulging projections 10A10B are provided so as to project from the projection receiving recess 9 of the rubber plug 3 so as to have an arc-shaped outer circumference. ing.

That is, the bulging projections 10A10B and the projection receiving concave portion 9 are formed by the rubber plug 3
While pressing the retainer 8 from the rear of the bulge to forcefully insert the bulging protrusion 10A10B into the protrusion receiving recess 9, the outer periphery of the electric wire 7 inserted through the center of the protrusion receiving recess 9 is held by the pair of bulging protrusions 10A10B. The rubber stopper 3 of the elastic body is designed to have the sealing portion 5 swelled outward, and the rubber stopper 3 in a natural state.
The diameter D ₁ of the projection receiving concave portion 9 of the
The diameter of the outer peripheral circle formed by 0B is smaller than D ₂ and D ₂ > D ₁ , and the amount of “D ₁ −D ₂ ” is so large that the seal portion 5 is pressed against the inner periphery of the rubber plug insertion portion. , It is formed so as to obtain an enormous amount sufficient to secure the necessary sealing performance.

On the other hand, the outer diameter D' ₃ of the seal portion 5 of the rubber plug is set so that the seal portion 5 before enlarging can be extremely easily inserted into the rubber plug insertion portion 15 at the entrance of the terminal accommodating chamber 2. Inlet diameter D ₃
Is approximately equal to or slightly smaller than D ₃ ≈D ′ ₃
Alternatively, the retainer 8 has a dimensional relationship of D ₃ > D ′ ₃ , and the retainer 8 is connected to the connector housing 1 including a retaining hole 12 formed in the retainer 8 and a retaining protrusion 13 protruding from the peripheral wall of the connector housing 1. Retainer 8
When the rubber plug 3 is pressed to the normal position, this locking mechanism engages with the "pachin", the retainer 8 is locked to the connector housing 1, and the terminal 6 is prevented from coming off. Although not shown in the figure, the terminal 6 itself has a primary locking mechanism for locking the insertion position into the terminal accommodating chamber 2.

Then, as shown in FIG. 1 (C), the terminal 6 having the rubber plug 3 is inserted into the terminal accommodating chamber 2, and at the same time, the rubber plug 3 is inserted into the rubber plug insertion portion 15, and then the retainer is attached from the rear side. 8 is applied to close the entrance of the terminal accommodating chamber 2,
When the bulging projections 10A10B of the retainer 8 are press-fitted into the projection receiving recesses 9 of the rubber plug 3, the locking hole 12 and the locking projection 13 are engaged with each other, and at the same time, the sealing portion 5 of the rubber plug 3 is enlarged. The inner circumference of the rubber plug insertion portion 15 is firmly and uniformly pressed to ensure a waterproof function.

In the waterproof connector of the present invention having the above configuration, the seal portion 5 of the rubber stopper 3 is intentionally made small to reduce the insertion resistance into the connector housing, and after the insertion, the outer diameter of the rubber stopper is forcibly expanded to improve the sealing performance. Therefore, the insertability of the rubber stopper is extremely good, the outer shape of the rubber stopper expands almost uniformly outward, and good sealing performance can be secured, and the insertability is improved. Therefore, there is no possibility that the terminal 6 is half-inserted due to insufficient insertion of the rubber plug 3.
In addition to ensuring the waterproofness of the retainer 8, a secondary locking of the terminal 6 by a locking mechanism to the connector housing 1
The rubber plug 3 is pushed backward to act as a multi-function to prevent the terminal 6 from being half-inserted.

"Effect of the Invention" As described above, the waterproof connector of the present invention ensures good insertability of the rubber plug to improve workability and
Prevent half-insertion of terminals. It also has good sealing performance due to the uniform expansion of the rubber plug, and the secondary locking of the rubber plug due to the expansion of the rubber plug and the secondary locking to prevent the terminal from coming off by the simple work of the retainer's post-press locking Insertion prevention
There is excellent practicality that can be achieved simultaneously.

[Brief description of drawings]

FIG. 1 shows a waterproof connector according to an embodiment of the present invention, and FIG.
Is a perspective view of its constituent members, (B) is a retainer 8 of (A)
A perspective view from A, (C) is a front view of its usage state Main symbols: 1: Connector housing, 2: Terminal accommodating chamber, 3: Rubber stopper, 4: Mounting part, 5: Seal part, 6: Terminal, 7: Electric wire, 8: Retainer, 9: Projection receiving recess, 10A10B: Swelling projection, 15: Rubber plug insertion part, 16: Crimp piece

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Masakuni Kasugai 1820 Nakanoike, Mikkaichi-cho, Suzuka-shi, Mie 1820 Sumitomo Wiring Systems Co., Ltd. (56) References Sho 60-133587 (JP, U) Actual development Sho 61-44782 (JP, U) Actual public Sho 53-38145 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A rubber plug of an integral body having the electric wire inserted through a center hole is caulked and fixed to the electric wire together with the terminal behind the terminal connected to the electric wire, and a sealing portion of the rubber plug is attached to a terminal accommodating chamber of a connector housing. In the waterproof connector that is pressed against the inner circumference of the rubber plug insertion portion, the outer diameter of the seal portion is formed to be substantially equal to or less than the inner diameter of the rubber plug insertion portion, and the rubber plug insertion portion is inserted into the rubber plug insertion portion. The rubber plug in the wearing position is pressed from the rear, and a retainer having a locking mechanism to the connector housing is provided, and further, a central portion of the rubber plug is provided.
A projection receiving concave portion having an arc outer circumference is provided so as to surround the insertion current wire and open rearward, and the rubber plug facing surface of the retainer is forcibly fitted into the projection receiving concave portion of the rubber plug, and the facing arrangement is provided. Then, a bulging projection having an arc outer circumference larger than the arc outer circumference is formed, and the bulging projection of the retainer is fitted into the projection receiving recess of the rubber plug to expand the outer diameter of the rubber plug and the retainer. Waterproof connector featuring a structure that locks the connector to the connector housing.