OBJECT OF THE INVENTION
The present invention refers to a device to check the closure
of the locking cover in electrical connectors of the type consisting of one or several
metallic terminals provided with an electrically isolating, protective casing.
The object of the invention focuses on a device that besides
checking electrical continuity of the terminals, verifies that the locking cover
of the casing that holds the terminal is correctly closed.
BACKGROUND OF THE INVENTION
Industry in general, especially the car sector, requires
wiring manufacturers to guarantee that connectors inserted into the ends of wires
have electrical continuity and are correctly inserted. The existence of a faulty
connection, once the wiring has been fitted, may lead to an important problem in
the final product, difficult to solve.
To check the correct wiring connection of the metallic
terminals to the electrical wire, devices fitted with an antagonist casing already
exist, in which the assembled connector is inserted in order to check its electrical
continuity. To this end, an electrical current that goes through the wiring and
therefore the connector is made to pass through terminals situated at the bottom
of the antagonist casing, making contact with each of its metallic terminals. If
there is electrical continuity in the circuit, it means that the terminals are connected
correctly, and if there is no continuity, it means that there is some terminal that
is not correctly connected.
Checking of the wiring is generally carried out on a desk
on which there are as many checking devices as connectors that the wiring has to
its respective antagonist casing. All wires are connected to their respective antagonist
casings and the electrical continuity "test" is carried out, as well as other electrical
Electrical connectors are made up of several independent
metallic terminals set inside a protective, isolating casing, whose unit really
makes up the connector. The above-mentioned casing is made up of a unit of isolating,
generally plastic material, provided with screw holes in which the metallic terminals
are locked into place, thanks to the existence of a lateral blocking cover, known
in the slang of this technical sector as "spacer" or "secondary lock", that keeps
them in their working position. The existence of the above-mentioned locking cover
gives the connector greater security, since, if the metallic terminals are not well
"clamped", that is to say, are not correctly placed in their casing, the locking
cover or "spacer" does not close, obliging the worker to check them.
Generally, this "clamping" operation and locking cover
closure is carried out in a mechanical way, for which reason this cover may occasionally
remain open, or badly closed because some terminal has been badly "clamped" and
the cover has been forced in order to close it.
This error may lead to many problems since when the electrical
continuity "test" previously explained is undertaken, it will validate it as correctly
connected Nevertheless, under operating conditions, when the connector must be inserted,
the aforementioned terminal could be displaced from its casing and not carry out
the desired electrical contact.
DESCRIPTION OF THE INVENTION
The device to check locking cover closure in electrical
connectors that the invention proposes, solves the previously explained problem
on having means to check its correct closure.
To this end, and in more concrete way, the device to check
locking cover closure in electrical connectors, is of the type made up of a bed
plate prepared for its installation on a desk and provided with a casing antagonist
to the electrical connector to be checked, with various electrical contact metallic
terminals at the bottom of the casing, comprising a guided metallic bolt that slips
longitudinally over the lateral surface of the connector with the locking cover,
whose bolt is connected to a phase in an electrical circuit, having previously provided
a contact terminal at the end of bolt run, to carry out the electrical continuity
of the circuit when it reaches the aforementioned position.
In order to produce electrical continuity in the aforementioned
circuit, the metallic bolt has a spiral spring that permanently drives it against
the contact terminal placed at the end of its running movement.
Thus, when the metallic bolt slides over the surface of
the connector with the locking cover, and is correctly closed, the bolt will continue
moving until it makes contacts with the terminal positioned at the end of the stroke,
producing the electrical continuity of the circuit for its conformity.
In the opposite case, that is to say, that the locking
cover is open or closed incorrectly, it will jut out from the surface of the connector
and stop the metallic bolt from sliding, avoiding its contact with the terminal
at the end of the run, and, therefore, will not produce electrical continuity in
the circuit. The lack of electrical continuity will mean the existence of a failure
in the connector, which will activate the corresponding warning sign.
Since the metallic bolt will have to detect the minimum
rebound that could be caused by the incorrect closing of the locking cover, the
device has means to regulate the distance passed between the surface of the connector
and the contact surface of the bolt.
The above-mentioned means of regulation consists of a set
of ball-screws screwed into the verification unit, whose inner ends limit the transversal
movement of the metallic bolt, coinciding with the position of the connector's locking
DESCRIPTION OF THE DRAWINGS
To complete the description that is being given and in
order to help give a better understanding of the invention's characteristics, with
the idea to provide an essential example of its practical undertaking, a set of
drawings with illustrative, not limitative character is attached as an integral
part of the aforementioned description, showing the following:
PREFERRED EMBODIMENT OF THE INVENTION
- Figure 1 shows a partly-cut exploded view of the device to check closure of
the locking cover in electrical connectors.
- Figure 2 shows a partly-cut view of the fitted device carrying out the checking
of an incorrectly closed connector.
- Figure 3 shows an outline view of the device in which the connector with the
locking cover open, the metallic bolt and the contact terminal at the end of the
run are shown.
- Figure 4 shows the same view as the previous figure, but with the locking cover
In view of the outlined figures, it may be seen that the
device to check closure of the locking cover in electrical connectors is made up
of a bed plate 1, fitted out for its installation on a verification desk, with screws
through screw-holes 2.
Under bed plate 1, corresponding to window 3, is checking-unit
4, provided with antagonist casing 5 of connector 6 to be checked Evidently, casing
5 will be given the antagonist role and shape of the connector in question, regardless
of whether it is a uni- or multi-polar connector
The bottom of the antagonist casing 5 includes contact
terminals 7, longitudinally-moveable and helped by inner springs fitted into terminal
package 8, not shown in the drawings
These metallic terminals are responsible for establishing
contact with the electrical terminals 9 of the connector 6, in order to check its
electrical continuity. There shall be as many studs 7 as terminals 6 that the connector
to be checked has.
To check the closure of the locking cover or "spacer",
the device is fitted with a prismatically-configured guided metallic bolt 11, which
slips lengthways and in parallel across the lateral surface of the connector 6 comprising
the locking cover 10, to detect its position.
To this end, the lower end of the bolt 11 is connected,
through a terminal 12, to a phase in the electrical circuit, which makes a circuit
with another phase, through a terminal 13 at the end of the stroke that the bolt
11 makes. Thus, when contact is made between the end of the bolt 11 and the terminal
13, electrical continuity is made in the circuit.
The device includes a spiral spring 14 that permanently
drives the bolt 11 against the terminal 13 at the end of the run it makes.
When the locking cover 10 is correctly closed, the metallic
bolt 11 slides over the surface of the connector 6 and will continue moving until
it makes contacts with the terminal 13 positioned at the end of the stroke, producing
electrical continuity in the circuit for its conformity.
In the opposite case, that is to say, that the locking
cover 10 is open or closed incorrectly, it will jut out from the surface of the
connector 6 and stop the metallic bolt 11 from sliding, avoiding its contact with
the terminal at the end of the run, and, therefore, will not produce electrical
continuity in the circuit. The lack of electrical continuity will mean the existence
of a failure in the connector, which will activate the corresponding warning sign.
So that the metallic bolt 11 may detect the minimum rebound
that could be caused by the incorrect closing of the locking cover 10, the device
has means to regulate the distance passed between the surface of the connector 6
and the contact surface of the bolt 11.
In the present example of preferred embodiment, these means
of adjustment consist of a set of ball-screws 15 screwed into the verification unit
4, whose inner ends 16 limit the transversal movement of the metallic bolt 11, coinciding
with the position of the connector's 6 locking cover 10.
To carry out verification, the worker inserts the connector
6 into antagonist casing 5, pushing it to the end, at which moment pneumatic cylinder
17 activates grip pin 18, responsible for keeping it in the above-mentioned position.
The corresponding sensor will activate the pneumatic cylinder 19, which will axially
shift to the terminal packet 8 up to the verification unit 4 so that the terminals
7 establish contact with the respective metallic terminals 9 of the connector 6.
With the terminal packet 8, the metallic bolt 11 will move, which will slide over
the lateral surface of the connector 6 to detect the position of the locking cover
In the same way as has been previously indicated, if the
locking cover 10 is open or closed incorrectly, it will cause a rebound on surface
of the connector 6 and stop the metallic latch 11 from sliding, avoiding its electrical
contact with the terminal 13, and, therefore, will not produce electrical continuity,
the failure in the connector being alerted.
Having sufficiently described the nature of the invention,
as well as the way to embody it in practice, it must be emphasized that the previously
indicated layouts, represented in the attached drawings, may be modified as long
as they do not alter the fundamental principle.