Revised structure for on-line switch

Details Revised structure for on-line switch Revised structure for on-line switch

2000-09-08

2001-07-03

Gellner, M. L. (Department: 2832)

Electricity: circuit makers and breakers

Solid contact

Rocking actuator

C439S455000

Reexamination Certificate

active

06255613

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a revised structure of an on-line switch, and more particularly to one that helps ensure the safety of the on-line switch, by preventing electric wires connected with the on-line switch from loosening or even falling off.
2. Description of the Prior Art
Although there are many types of conventioal on-line switches, the basic structure is comprised of a distribution box body
1
and a box cover
2
, which can be fastened to the distribution box body
1
(as shown in
FIG. 1
) for positioning; a control space created after the distribution box body
1
and the box cover
2
being fastened together can be used to accommodate a control element
3
(the controlling modes may be sliding, levering, or pressing, and so on.). The front and back of the distribution box body
1
and the box cover
2
, which corresponds the control element
3
, form wire slots
30
, allowing an exposed wire
40
on the end of an electric wire
4
to enter and connect to the control element
3
, and providing the function of connecting, with the electric wire
4
.
The conventional on-line switch of which the control element
3
can control on and off of the electric wire
4
, and consequently provide convenient controlling function for associated appliances (such as lamps, electric fans. . . ). However, the conventional on-line switch obviously has some unsatisfactory considerations in safety; because the on-line switch is installed on the wire, not on the appliances; the firmness of the on-line switch should be particularly important, Therefore, should the on-line switch be secured firmly, the current transmission in the wire would be stable and safe. However, the wire slots
30
provided by the switch box
1
and the box cover
2
can only form a passage for a plastic sheath
41
of the electric wire
4
, but cannot the grip plastic sheath
41
in position. Therefore, when the electric wire
4
is under improper pulling, connection between the exposed wire
40
on the end of the electric wire
4
and the control element
3
would be loosening, or even falling off, and, as a result, the controlling function of the on-line switch would be lost. Thus, the conventional on-line switch is unsatisfactorily designed in this regard. In particular, if the improper pulling causes the electric wire
4
loosening, but not falling off, the transmitting current in the electric wire
4
would be unstable; it is possible that the operating current in the electric wire
4
becomes too large and causes overheat, or even fire.
The design of the conventional on-line switch obviously does not consider the importance in gripping electric wire firmly, posing huge potential risk in use, and the design, therefore, should be improved,
SUMMARY OF THE INVENTION
The present invention is to provide a revised structure for an on-line switch. In particularly, inside the distribution box of the on-line switch are four different and separated wire slots in the place where an electric wire passes through. The left, right, and base of the slots are designed to be triangular-pyramid gripping convexes. Moreover, the gripping convex, situated in the base of the slot is a gripping structure, Which is a V-shape of slightly inward. The cover of the box, which corresponds the gripping structures of the distribution box, has wire-pressing convexes to press the electric wire after the electric wire being inserted to the wire slots and the box cover being mounted. The insulated sheath of the electric wire will deform slightly after being pressed downwards by the wire-pressing convexes; consequently, the deformed wire can envelope the gripping convexes around the wire slots. In the mean time, the gripping force on the upper, lower, left, and right sides of the electric wire is so large that the electric wire can be firmly secured in position. Therefore, the risk of loosening, or even falling, electric wires caused by improperly applied pulling force can be effectively prevented.


REFERENCES:
patent: 2038902 (1936-04-01), Peterson
patent: 3317688 (1967-05-01), Cherry et al.
patent: 6005210 (1999-12-01), Chien
patent: 6051801 (2000-04-01), Wang

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