Insertion socket for use with a flat cable

Details Insertion socket for use with a flat cable Insertion socket for use with a flat cable

2001-02-05

2002-05-28

Vu, Hien (Department: 2833)

Electrical connectors

Including or for use with tape cable

C439S495000

Reexamination Certificate

active

06394838

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to an insertion socket for use with a flat cable, and more particularly to an insertion-type socket in which an increased contact pressure is applied by terminals provided inside the socket on the flat cable inserted into the socket when the cover of the insertion socket is closed onto the socket. With the insertion socket of the present invention, a large reactive force is generated by the terminals which acts on the cover so that the cover will not accidentally.
Soft flat cables are mainly used in integrated circuit boards to connect different circuits. On a circuit board
14
, there is provided with a plurality of relatively small insertion sockets
12
for flat cables
10
to insert thereinto. As can be seen in
FIG. 1
, each of these insertion sockets
12
includes a cover
13
. When the cover
13
is lifted to an open position, as shown by the phantom lines in
FIG. 1
, the insertion socket
12
has a widened front opening via which a flat cable
10
is inserted into the socket
12
. When the cover
13
is in a close position on the insertion socket
12
, the flat cable
10
is pressed to contact with terminals
11
received in the insertion socket
12
and thereby provides an electrical circuit. In brief, in the conventional insertion socket
12
, the flat cable
10
is brought to contact with and press against the terminals
11
in the insertion socket
12
due to a pressure applied by the cover
13
on the flat cable
10
when the cover
13
is in the close position.
In the conventional insertion socket
12
, a contact pressure applied on the flat cable
10
by the terminals
11
is calculated from the following formula (1):
CP=TP/TA
  . . . (1)
wherein CP is the contact pressure applied on the flat cable
10
by the terminals
11
, TP is a total pressure against the flat cable
10
when the cover
13
is closed onto the insertion socket
12
, and TA is a total area of the flat cable
10
contacting with and being pressed by the cover
13
.
The total pressure is generated when the cover
13
is closed onto the insertion socket
12
and it is equal to a total resistance or reactive force from the flat cable
10
to or acted on the cover
13
. In the event there is a total pressure or a total reactive force larger than a force retaining the cover
13
to the insertion socket
12
, it will result in a loosened cover
13
from the insertion socket
12
. That is, there is an upper limit in the value of the total pressure TP in the conventional insertion socket
12
shown in FIG.
1
. This limitation prevents the flat cable
10
from being firmly connected to the insertion socket
12
.
SUMMARY OF THE INVENTION
A primary object of the present invention is to provide an insertion socket that has a structure enabling an increase contact pressure applied by terminals received in the socket on a flat cable inserted into the socket, so that the flat cable would not easily separate from the insertion socket.
To achieve the above and other objects, the insertion socket for flat cable of the present invention mainly includes a socket main body defining a plurality of terminal cavities therein, a cover connected to a top of the socket main body to pivotally turn between an open and a close position, and a plurality of terminals separately received in the terminal cavities. Each of the terminals has a rear end projected from a rear side of the socket main body to provide a connecting pin, and a front barb portion that is formed at a lower side with a plurality of backward extended barbs. When the cover is pivotally turned downward to the close position on the socket main body, it contacts with and applies a pressure on the barb portions of the terminals to cause the barbs on the barb portions to contact with and press against a flat cable inserted into the socket main body and located below the barb portions. And, an area on each of the barb portions contacting with the cover in the close position is a specially determined bevel surface, such that a reactive force acted by the barb portions of the terminals on the cover in the close position on the socket main body does not result in a lifted cover.


REFERENCES:
patent: 4367006 (1983-01-01), Rehbogen, Jr. et al.
patent: 4944690 (1990-07-01), Imai
patent: 6056572 (2000-05-01), Matsumoto et al.
patent: 6116947 (2000-09-01), Takayasu
patent: 6203345 (2001-03-01), Rogue et al.
patent: 6224418 (2001-05-01), Miura et al.

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