Note: Descriptions are shown in the official language in which they were submitted.
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i3~-339 PATENT
TERMINATING DEVICE FOR WIRE
1 FIELD OF INVENTION:
This device relates to an electrical terminal used to
terminate a wire, and in particular to a terminal useful for
terminating a wire connected to a water-proof connector.
BACKGROUND OF THE INVENTION~
A terminal according to the prior art is described with
reference to Figures 5 to 7.
Figure 5 shows terminal 1' as it is connected by a
connecting plate known as a carrier 4'. The terminal actually
used is severed from the carrier plate. As shown in Figure 6,
insulating material of a wire is crimped by a portion of the
terminal and another portion thereof is electrically connected
to a conductor having the insulating material removed therefrom
to expose the conductor.
In this case, burrs 9' formed when the terminal is
severed from the carrier outwardly protrude greater than the
outer diameter of that portion of the terminal which crimps the
insulating material of the wire, as shownO When the wire thus
terminated is to be connected to a water-proof connector, for
example, it is necessary to push it through a rubber bushing as
shown in Figure 1 which will be described later, and therefore,
at that time, the burrs can damage the rubber bushing to thereby
reduce the waterproofing effect of the connector. Figure 7 shows
a prior art terminal having a receptacle at the tip end thereof.
SUMMARY OF THE INVENTION: ~
The present device has as its object the provision of
a terminal having structure which reduces the above-noted
deficiencies peculiar to th,e prior-art terminating devices.
BRIEF DESCRIPTIO~ O~ THE DRAWINGS:
Figure 1 is a cross-sectional view showing an
embodiment of the present de~ice in use.
F~gure 2 is a perspective view showing a first
embodiment of the present terminating device.
Figure 3 shows the embodiment of Figure 2 in use.
Figure 4 shows other features of the preferred
embodiment in use.
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l Figure 5 is a perspective view showing an example of
a prior art terminating device.
Figure 6 shows portions of the same embodiment of the
prior device of Figure 5 in use.
Figure 7 shows o.her features of the prior art device
in use.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT:
Figure 1 shows a wire terminated by the terminal of the
` present invention as it is used in a water-proof connector. In
Figure 1, the reference numeral 10 designates a first housing (of
the plug type), the reference numeral 11 denotes a second housing
(of the cap type) fitted to the first housing, and the reference
numeral 12 designates a locking spring mounted on the top of the
first housing. When the two housings 10 and 11 are fitted
together, the engagement projection of the second housing 11 is
engaged with an engagement hole formed in the spring. The
reference numeral 13 denotes a rubber bushing contained in a
concavely depressed portion formed in the first housing 10. The
rubber bushing 13 is formed with a plurality of through-holes
through which are extended wires terminated by the terminal
according to the present device.
The terminal 1 of the preferred embodiment has a
receptacle 2 provided at the tip end thereof, and is contained
in a containing groove provided in the first housing 10. A
ferrule 3 is provided on the end of the receptacle of the
terminal, and as shown, it is engaged with a lance 14 provided
in the containing groove of the housing 10, thereby holding the
terminal 1.
In Figure 1, the reference numeral 15 designates a
sealing member, the reference numeral 16 denotes an earth plate,
the reference numeral 17 designates a through capacitor, and the
reference numeral 18 denotes a printed circuit board.
The reference numeral 19 designates a pin contact, one
end portion of which is inter-fitted to the receptacle 2 of the
terminal 1 of the present device to thereby make electrical
contact therewith. The other end portion of the pin contact 19
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is electrically connected to a conductive pattern of the printed
circuit board.
Figure 2 show~ a terminal 1 of the present device as
it is connected to a connecting plate called a carrier 4. The
terminal actually used is cut at a location indicated by a dot-
and-dash line 20 and severed from the carrier 4, which defines
an inwardly directed tab.
Figure 3 shows the essential portions of a wire 5
terminated b~ such the terminal 1. As shown, the terminal of the
present device comprises a contact portion 7 electrically
connected to an exposed portion of a conductor 6 of the wire 5,
and an insulating material crimping portion 8 for crimping
insulating material of said wire, said insulating material
crimping portion having an outwardly bulged barrel-like portion
8a.
Burrs 9 may be formed when the terminal 1 is severed
from the carrier. However, in the present device, as is apparent
from Figure 3, the barrel-like portion 8a of the insulating
material crimping portion bulges out to a dimension greater than
the outer diameter of the burr portion.
Figure 4 shows the tip end portion 2 of the wire 5
. -.
terminated by a terminal of the type having a receptacle,
according to the present device.
In Figure 2, a level difference is provided in a region
wherein the insulating material crimping portion 8a is connected
to the carrier, and this also is effective for preventing burrs
from protruding beyond the outer diameter of the insulating
material crimping portion 8a. A similar effect may be provided
by forming a recess in the region wherein the insulating material
crimping portion is connected to the carrier.
In the terminal according to the present device, the
barrel-like portion of the insulating material crimping portion
bulges out to a dimension greater than the outer diameter of the
burr portion formed when the terminal is severed from the
carrier. Therefore, when a wire terminated by such the terminal
is connected, for example, to a water-proof connector, the rubber
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1 bushing 13 used for extending and holding the terminal
~herethrou~h, is not damaged and accordingly, the water-proofing
effect is not distur~ed. ~ ~:~
Having described the preferred embodiment of the
invention herein, it should be appreciated that variations may ~
be made thereto without departing from the contemplated scope of ~ ~:
the invention. Accordingly, the preferred embodiment is intended ~
in an illustrative rather than a limiting sense. The true scope ~ :
of the invention is set forth in the claims appended hereto. .
