Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With product ejector
Reexamination Certificate
2002-05-06
2004-03-16
Heitbrink, Tim (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With product ejector
C264S318000, C264S334000, C425S572000, C425S573000, C425S577000, C425SDIG005
Reexamination Certificate
active
06705854
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a connector with a rear holder and a method of producing the connector, in which a housing and the rear holder are molded in a plurality of metal-molds, and thereafter the rear holder is provisionally retained on the housing by moving the metal-molds, and the rear holder can be completely retained after the insertion of connection terminals.
The present application is based on Japanese Patent Application No. Hei. 11-237262, which is incorporated herein by reference.
2. Description of the Related Art
There are known various examples of a rear holder-attached connector and a methods of producing the same, and such one example is disclosed in Unexamined Japanese Patent Publication No. Hei. 8-315896.
In a conventional rear holder-attached connector
51
shown in
FIGS. 10
to
14
, a rear holder
70
, movable between a provisionally-retained position and a completely-retained position, is provided on a housing
52
in a straddling manner, and is held in the provisionally-retained position, the housing
52
having a plurality of terminal receiving chambers
53
. Connection terminals
80
are inserted respectively into the terminal receiving chambers
53
from the rear side of the housing
52
, and are retained respectively by housing lances
81
provided respectively within the terminal receiving chambers
53
. Then, the rear holder
70
is held in the completely-retained position, thereby retaining the connection terminals
80
in a double manner.
More specifically, a forwardly downwardly-slanting, retaining hole or slot
72
is formed through each of opposite side walls
71
of the rear holder
70
, and secondary retaining projections
73
for respectively retaining the connection terminals
80
in a secondary manner are formed on a lower surface of the rear holder
70
at a front end portion thereof. An upper side of each terminal receiving chamber
53
is open as at
53
a
at a central portion thereof, and the secondary retaining projection
73
is inserted obliquely downwardly into the terminal receiving chamber
53
through this opening
53
a
when the rear holder is moved from the provisionally-retained position to the completely-retained position. Forwardly downwardly-slanting, provisionally-retaining projections
54
are formed respectively on opposite side surfaces
52
a
of the housing
52
, and also forwardly downwardly-slanting, completely-retaining projections
55
are formed respectively on the opposite side surfaces
52
a
, and are disposed obliquely forwardly of the provisionally-retaining projections
54
, respectively. The projections
54
, as well as the projections
55
, are engageable in the retaining holes
72
, respectively.
In the rear holder-attached connector of the above construction, when the rear holder
70
is pressed or pushed from a position above the rear end portion of the housing
52
, the retaining holes
72
are retainingly fitted respectively on the provisionally-retaining projections
54
, so that the rear holder
70
is held in the provisionally-retained position relative to the housing
52
. Then, the connection terminals
80
, each connected to a sheathed wire W, are inserted respectively into the terminal receiving chambers
53
from the rear side, and are primarily retained by the housing lances
81
, respectively.
Then, when the rear holder
70
is pressed forwardly obliquely downwardly, the side walls
71
are elastically deformed laterally, so that each retaining hole
72
is disengaged from the provisionally-retaining projection
54
, and advances obliquely forwardly, and a front end of each side wall
71
slides over the completely-retaining projection
55
. Then, the retaining holes
72
are retainingly fitted on the completely-retaining projections
55
, respectively, and at the same time the secondary retaining projections
73
are inserted respectively into the terminal receiving chambers
53
through the respective openings
53
a
to secondarily retain the connection terminals
80
, respectively.
In the case where the housing
52
and the rear holder
70
are molded separately from each other, and then are brought to an assembling site where the housing and the rear holder are assembled together, the conveyance to the assembling side, the assembling step and an examination step are required, and besides a stock control for each of the housing
52
and the rear holder
70
is necessary.
To improve this, there has been proposed a rear holder-attached connector in which a rear holder
70
and a housing
52
are molded by a metal-mold assembly shown in
FIG. 14
, and also the rear holder
70
is attached to the housing
52
in a provisionally-retained condition, and then the two are removed from the metal-mold assembly.
The provisionally-retaining metal-mold assembly
90
, shown in
FIG. 14
, comprises a fixed metal-mold
91
, a first movable metal-mold
92
capable of moving upward and downward, and a pair of second movable metal-molds
93
and
93
capable of moving right and left. The housing
52
is molded by the fixed metal-mold
91
, the first movable metal-mold
92
and inner sides of the second movable metal-molds
93
and
93
. The rear holder
70
is molded by the fixed metal-mold
91
, an outer side of the first movable metal-mold
92
and the inner sides of the second movable metal-molds
93
and
93
.
First, the housing
52
and the rear holder
70
are molded by all of the metal-molds combined together, and then the first movable metal-mold
92
is moved downward, and then the second movable metal-molds
93
and
93
are moved right and left, respectively, that is, away from each other. As a result, the rear holder
70
and the housing
52
are molded, with the formed provisionally retained on the latter, and when the first movable metal-mold
92
is moved downward, the housing
52
and the rear holder
70
are discharged from the provisionally-retaining metal-mold assembly
90
.
In the conventional rear holder-attached connector
51
, however, the retaining holes
72
are retainingly engaged with provisionally-retaining projections
54
to hold the rear holder
70
on the housing
52
in the provisionally-retained condition, and also the retaining holes
72
are retainingly engaged with the completely-retaining projections
55
to hold the rear holder
70
on the housing
52
in the completely-retained condition. Therefore, in order that the rear holder will not move or shake relative to the housing in either of the two retained conditions, high dimensional accuracies are required, and this has invited problems that the productivity is lowered and that the cost increases.
And besides, with the provisionally-retaining metal-mold
90
, the housing
52
and the rear holder
70
are molded in such a manner that the rear holder
70
is held on the housing
50
in the provisionally-retained condition. Therefore, it is necessary to provide a gap G
1
between the inner surface of each side wall
71
of the rear holder
70
and the corresponding side surface of the housing
52
, and also it is necessary to provide a gap G
2
between the upper surface of the housing
52
and the lower surface of each secondary retaining projection
73
on the rear holder
70
, as shown in FIG.
13
.
Therefore, as shown in
FIG. 14
, a thin plate-like partition plate portion
94
for forming the gap G
2
is formed on the fixed metal-mold
91
, and thin plate-like partition wall portions
95
for respectively forming the gaps G
1
are formed on the fixed metal-mold
91
, and partition wall portions
96
are formed on the first movable metal-mold
92
. And besides, a thin mold portion needs to be provided between the outer periphery of each provisionally-retaining projection
54
and the inner peripheral edge of the corresponding retaining hole
72
. The metal-molds have such thin plate portions, and this has invited a problem that the durability of the metal-molds is lowered.
SUMMARY OF THE INVENTION
With the above problems in view, it is an object of the pre
Heitbrink Tim
Sughrue & Mion, PLLC
Yazaki -Corporation
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