Compound tools – Electrical connection forming or wire preparation
Reexamination Certificate
2001-10-05
2003-10-28
Smith, James G. (Department: 3723)
Compound tools
Electrical connection forming or wire preparation
C072S409010
Reexamination Certificate
active
06637060
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to a pair of pliers for connecting a telephone line connector by compression, and especially to a compression connecting structure capable of substantially reducing the horizontal component generated by an action force. The pliers can, in addition to obtaining a larger vertical force to connect a connector for a telephone line by compression, reduce the damage that the horizontal force component may make on a guiding groove of a compression connecting seat by abrading.
2. Description of the Prior Art
A connector of the communication line of a common communication equipment generally has the coating layer of the communication line peeled off to reveal the core lines of a suitable length. Thereafter the core lines are extended into the connector under the inserting pins of the latter so that a pair of compression connecting pliers presses the inserting pins of the connector into the connector. The bottoms of the inserting pins pierce the coating layer of the core lines to contact the core lines, and clamp the latter to complete the connection and assembly of the communication line with the connector. And as shown in
FIG. 1
which is a schematic view showing a compression connecting structure for assembling a communication line with a connector, a pair of compression connecting pliers “A” are provided thereon with a pair of handles A
1
to be held by an operator. The pair of handles A
1
are pivotally connected by a pivot pin A
2
at an appropriate position.
One of the pair of handles A
1
is provided thereon with a compression connecting seat A
3
for fitting over the connector, while the other of the pair of handles A
1
is provided thereon with a compression connecting block A
4
for inserting into the compression connecting seat A
3
for pressing the connector; so that a compression clamping action of the pair of handles A
1
renders the compression connecting block A
4
to press fixedly for connecting the connector with the telephone line in the compression connecting seat A
3
.
The compression connecting seat A
3
is provided on the main body thereof with a receiving seat A
31
to receive the connector, and a guiding groove A
32
for guiding vertical insertion of the compression connecting block A
4
. However, since the handles A
1
move in a round path about the pivot pin A
2
, the compression connecting block A
4
is mounted in a limiting groove A
6
in one of the handles A
1
by means of a limiting pin A
5
, and the limiting groove A
6
is beveled from both the compression connecting seat A
3
and the pivot pin A
2
, so that the lower edge of the limiting groove A
6
becomes a push guiding edge A
61
to push the compression connecting block A
4
away from the receiving seat A
31
, while the upper edge of the limiting groove A
6
becomes an abutting edge A
62
to press the compression connecting block A
4
into the receiving seat A
31
.
As shown in
FIG. 2
, when the handles A
1
move outwardly, the limiting pin A
5
thereof is moved by the push guiding edge A
61
of the limiting groove A
6
to move the compression connecting block A
4
away from the receiving seat A
31
of the compression connecting seat A
3
, so that the connector can be placed into the receiving seat A
31
. When the handles A
1
move inwardly, the limiting pin A
5
thereof is moved by the abutting edge A
62
on the upper edge of the limiting groove A
6
to move the compression connecting connection block A
4
into the receiving seat A
31
of the compression connecting seat A
3
. In this mode, compression connection of the connector of the telephone line is completed.
The limiting groove of a conventional pair of compression connecting pliers is a beveled elongate slot. As shown in
FIGS. 2 and 3
, when an operator exerts a compressing action force “F” on the handles A
1
to cause the abutting edge A
62
on the upper edge of the limiting groove A
6
to press the limiting pin A
5
and the compression connecting block A
4
for compression connection, the contact point of the abutting edge A
62
with the limiting pin A
5
is located beside the center of the limiting pin A
5
towards the pivot pin A
2
. The connector in the receiving seat A
31
will generate a resisting force “P” by contact of the limiting pin A
5
with the connector; and the resisting force may generate a component force P
1
from the limiting pin A
5
toward the contact point of the abutting edge A
62
with the limiting pin A
5
.
However, since the action force “F” for compressing the handles A
1
at one side of the pivot pin A
2
is directed towards the compression connecting seat A
3
and the end of the lower handle A
1
, its component force “P
1
” acts in a contrary direction to that of the action force “F”. Further the action force “F” must form a vertical component force larger than the resisting force “P” under the limitation of the guiding groove A
32
, thus the action force “F” will be formed at the same time a horizontal component force larger than the component force “P
1
” of the resisting force “P” is formed. Because the vertical component force of the action force “F” is used to press the compression connecting block A
4
towards the receiving seat A
31
, but the horizontal component force of the action force is limited by the lateral edge of the guiding groove A
32
from horizontal movement, the horizontal component force of the action force “F” will directly exert on one side of the guiding groove A
32
to thereby increase impedance against movement of the compression connecting block A
4
in the guiding groove A
32
, which may cause damage by abrading the guiding groove A
32
.
SUMMARY OF THE INVENTION
The pair of pliers for compression connecting a connector for a telephone line of the present invention has a compression connecting block connected with a limiting pin which is inserted in a limiting hole generally of a triangular shape on one of the handles. The upper edge of the limiting hole is an abutting edge bevel relative to a push guiding edge, so that when the abutting edge contacts and presses the limiting pin, the contact point between them is located beside the center of the limiting pin towards the direction where the action force is directed to, so that the component force of a resisting force from the center of the limiting pin towards the contact point of the abutting edge with the limiting pin is at the same side as that of the action force. Thereby, the horizontal component force of the action force can be reduced, since a larger vertical force can be obtained for compression connecting the compression connecting connector, and the degree of abrasion that the horizontal force component may make on the guiding groove can be reduced.
Another object of the pair of pliers for compression connecting a connector for a telephone line of the present invention is to directly mount a compression connecting seat to straddle the pair of handles and have it fixed on one of the pair of handles. The main body of the compression connecting seat is provided with an opening for insertion of the other of the pair of handles. A compression connecting block and a compression abutting block are provided respectively on the two sides of one of the handles for compression connecting by opening and closing of the pair of pliers. The handles can be both of a one-piece simple structure, and cumbersome shaping processes can be avoided. and the structure as well as the assembling operation of the whole pair of compression connecting pliers can thereby be simplified.
Another object of the pair of pliers for compression connecting a connector for a telephone line of the present invention is to provide fixedly on one of the handles of the pair of pliers a stop plate which has a stopping portion extending to the other of the handles in order to be located in the space between the handles when the handles are moved outwardly, thereby, the space between the handles provides an obscuring and stopping function to minimize resistance to the fingers of a us
Bacon & Thomas PLLC
Hanlong Ind. Co., Ltd.
Smith James G.
LandOfFree
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