Electrical connectors – Coupling part including flexing insulation – Sealing
Reexamination Certificate
2000-06-12
2002-04-23
Ta, Tho D. (Department: 2833)
Electrical connectors
Coupling part including flexing insulation
Sealing
C439S196000, C439S206000, C439S274000, C439S589000
Reexamination Certificate
active
06375500
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a small-size multi-way waterproof connector in which waterproofing property between a connector housing and a plurality of electric wires connected with terminals is improved.
A related waterproof connector, which is disclosed in Japanese Patent Publication No. 11-329571 will be explained with reference to
FIGS. 7
to
9
E. A connector housing
11
of the waterproof connector
10
″ consists of an inner housing
12
formed of a synthetic resin and including a plurality of terminal chambers
13
integrally formed therewith, an outer. housing
17
formed of a synthetic resin into which the inner housing
12
is adapted to be inserted, and a spacer
28
interposed between the inner housing
12
and the outer housing
13
in order to hold female terminals
14
contained in the above described terminal chambers
13
respectively.
As shown in
FIGS. 7 and 8
, the inner housing
12
has a box-like portion
12
a
of which an upper and a lower faces are open at their rearward ends. The above described terminal chambers
13
are formed in a space defined by a central horizontal wall
12
b
and vertical side walls
12
c
which also serve as partition walls. The female terminals
14
are adapted to be contained in the terminal chambers
13
respectively. The box-like portion
12
a
is integrally formed with projecting engagement claws
15
at opposite sides and a center of its upper and lower faces. Flange portions
16
are integrally formed so as to project from both sides of the box-like portion
12
a
at a center of its front face. Moreover, the front wall of the box-like portion
12
a
is provided with rectangular through holes
12
d
at positions corresponding to the terminal chambers
13
, into which male terminals of a mating connector (not shown) are adapted to be inserted. Further, each of the female terminals
14
has a pair of press-connection blades
14
b
which are bent from plate portions at both sides in the rear of a box-like portion
14
a.
As shown in
FIGS. 7 and 8
, the outer housing
17
is in a form of double boxes which are open at the front face, consisting of an inner wall portion
17
a
in a shape of substantially rectangular column, an outer wall portion
17
b
in a shape of substantially rectangular column enclosing the inner wall portion
17
a,
and a bottom wall portion (one wall portion)
17
c
connecting the inner and the outer wall portions
17
a,
17
b
at their rear parts. A central part of the bottom wall portion
17
c
is formed as a thick wall portion. In front of the thick wall portion are provided rubber plug chambers
19
each having a larger diameter and a circular cross section and in which waterproof rubber plugs
18
are contained by press-fitting or the like, at positions facing with the terminal chambers
13
. In the back of the thick wall portion are formed electric wire through holes
21
each having a smaller diameter and a circular cross section and through which electric wires
20
are adapted to pass so as to communicate with the corresponding rubber plug chambers
19
. Each of the waterproof rubber plugs
18
is substantially in a form of a cylinder having undulations at both inner and outer peripheral faces, so that the electric wire
20
is adapted to pass therethrough without clearance.
At front opposite sides of the upper and lower walls of the inner wall portion
17
a
of the outer housing
17
, are respectively provided rectangular slits
22
for engaging and disengaging with the engagement claws
15
which are formed at the opposite sides of the upper and lower faces of the box-like portion
12
a
of the inner housing
12
. At the front center of the upper and lower walls of the inner wall portion
17
a
is provided rectangular longer locking slits
23
for engaging and disengaging with the engagement claws
15
formed at the center of the upper and lower faces of the box-like portion
12
a
of the inner housing
12
. Moreover, in a depth of the outer face of the inner wall portion
17
a
of the outer housing
17
, is integrally formed a V-shaped packing receiving portion
25
in a projecting manner which is adapted to receive an annular waterproof packing
24
formed of rubber. Tapered faces
26
are respectively provided at front edges of the inner faces of the inner wall portion
17
a
at positions facing with the locking slits
22
and
23
. Further, the upper and lower walls of the outer wall portion
17
b
of the outer housing
17
are respectively provided in their forward parts with locking holes
27
for engaging and disengaging with flexible locking arms of the mating connector (not shown).
As shown in
FIGS. 7 and 8
, the spacer
28
is in a form of a box which opens at the front face, consisting of a body portion
28
a
in a shape of substantially rectangular column adapted to be fitted to the inner face of the inner wall portion
17
a
of the outer housing
17
, a flange portion
28
b
in a shape of substantially rectangular column which is integrally formed with the body portion
28
a
so as to be bent backwardly from the front end thereof and adapted to be fitted to the outer face of the inner wall portion
17
a
of the outer housing
17
, and a bottom wall portion
28
c
of the body portion
28
a.
The box-like portion
12
a
of the inner housing
12
is adapted to be inserted into the body portion
28
a
of the spacer
28
. At inner faces of the upper and lower walls of the body portion
28
a
of the spacer
28
, are integrally provided rib-like projections
29
for preventing detachment of the terminals which are adapted to engage with a rear end edge of the box-like portion
12
a
of the inner housing
12
and rear end edges of the box-like portions
14
a
of the female terminals
14
which are contained in the respective terminal chambers
13
.
In the front of the connected portion between the body portion
28
a
and the flange portion
28
b
of the spacer
28
are provided notches
30
,
31
respectively at positions corresponding to the engagement claws
15
and the flange portions
16
of the inner housing
12
. At outer faces of the upper and lower walls of the body portion
28
a
of the spacer
28
between the vertically arranged notches
30
are integrally formed engagement claws
32
for engaging and disengaging with the locking slits
23
in the outer housing
17
. Moreover, a distal end of the flange portion
28
b
of the spacer
28
is in such a form that it holds the packing
24
engaged in the packing receiving portion
25
in the inner wall portion
17
a
of the outer housing
17
when the spacer has been inserted in the outer housing
17
.
The bottom wall portion
28
c
of the spacer
28
is formed with electric wire through holes
33
at positions corresponding to the respective electric wire through holes
21
in the outer housing
17
. The bottom wall portion
28
c
of the spacer
28
serves to hold the rubber plugs
18
which are inserted into the respective rubber plug chambers
19
in the bottom wall portion
17
c
of the outer housing
17
, when the spacer has been fitted into the outer housing
17
. The electric wires
20
passed through the electric wire through hole
21
in the outer housing
17
, the rubber plugs
18
, and the electric wire through holes
33
in the spacer
28
are press-connected between a pair of the press-connection blades
14
b
of the female terminals
14
contained in the terminal chambers
13
in the inner housing
12
. The terminal chambers
13
and the electric wires
20
are sealed with the rubber plugs
18
and the packing
24
respectively.
In order to assemble the above structured waterproof connector
10
″, the rubber plugs
18
are first inserted in a fitting direction of the connector housing into the respective rubber plug chambers
19
inside the bottom wall portion
17
c
of the outer housing
17
which constitutes the exterior of the connector housing
11
, and set as shown in FIG.
9
A. Then, the packing
24
is inserted and set in the packing receiving portion
25
in the i
Fukuda Masaru
Ito Yuiti
Murakami Takao
Nguyen Truc
Sughrue & Mion, PLLC
Ta Tho D.
Yazaki -Corporation
LandOfFree
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