Mother board connector of public telephone

Details Mother board connector of public telephone Mother board connector of public telephone

1999-10-08

2001-02-27

Abrams, Neil (Department: 2839)

Electrical connectors

With insulation other than conductor sheath

Plural-contact coupling part

C439S891000

Reexamination Certificate

active

06193562

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a mother board connector of public telephone, and more particularly, to a connector structure which allows the terminals to easily insert into the socket hole of the connector and makes the terminals deform the conducting tube in the socket hole such that the axial displacement of the connecting tube in the socket hole is prevented.
BACKGROUND OF THE INVENTION
In the prior arts, public telephone needs conducting wires to connect the key device to the circuit board on the main telephone body such that the signal generated by pressing the key device can be transmitted to the circuit board for sequential communication process. The conducting wire has a terminal connector used to insert into the terminal socket on the circuit board. The terminal connector sometimes has to be disconnected to repair the telephone before the circuit board on the main telephone body is opened. The terminal connector is, then, connected again to the original place to conduct t he power supply after repair work is finished.
FIG. 5
shows a traditional circuit board connector of public telephone. The connector A consists of a first socket A
1
and a second socket A
2
, which have a socket holes A
10
and A
20
, respectively, with almost the same inner radius. The socket holes A
10
and A
20
are aligned when the first socket A
1
and the second socket A
2
are engaged and adhered together. A conducting tube B is sleeved into the socket holes A
10
and A
20
, and the back end of the conducting tube B is connected to a conducting wire D, which is partly coated with adhesive material (such as resin) to fix the conducting wire D. The diameter of the conducting tube B should be smaller than the inner radius of the socket hole A
10
or A
20
so that the side wall of the conducting tube B has radial elasticity and the terminal C may insert into the conducting tube B to be tightly clamped and fixed. The outer brim of the conducting tube B, however, may be deformed by inserting the terminal C into the socket hole A
10
with some deviation of degree, thereby the terminal C being not easily inserted into the conducting tube B. The conducting tube B is asserted an axial force when affected by the terminal. The conducting tube B may easily breaks through the adhesive material and protrudes outwards if the adhesion of the adhesive material E and the socket hole A
10
is not sufficient so as to make the conducting tube B touch deeper portion of the socket hole A
10
and further affect the contact of the terminal C and the conducting tube B. Therefore, the present invention provides an improved mother board connector of public telephone to overcome the above shortcoming in the prior arts.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a mother board connector of public telephone, which may make the terminal easily insert into the socket hole of the connector without deforming the conducting tube.
Another object of the present invention is to provide a mother board connector of public telephone, which may prevent the conducting tube inserted into the socket hole from axially moving due to the asserted force of the terminal, and further avoid ill contact between the terminal and the conducting tube.
The mother board connector of public telephone provided by the present invention includes a first socket base and a second socket base. The first socket base includes a plurality of first socket holes and a plurality of second socket holes on the two opposite ends of the first socket base, respectively, each first socket hole aligned with a respective second socket hole which has a smaller inner radius. A first conducting tube with an outer radius greater than the inner radius of the first socket hole is sleeved into the second socket hole and protrudes out of one end of the second socket hole. The front end of the second socket base includes a plurality of concave holes with respect to the first socket holes. The bottom of the concave hole has a conducting rod connected with a conducting wire to extend the conducting wire out of the second socket base. The concave hole is sleeved with a second conducting tube with an inner radius smaller than the outer radius of the conducting rod. The inner radius of the second conducting tube is the same as the outer radius of the first conducting tube such that the portion of the first conducting tube protruding the first socket base can insert into the spacing between the second conducting tube and the conducting rod to conduct each other when the first socket base is engaged with the second socket base.
Other features and advantages of the invention will become apparent from the following description of the invention which refers to the accompanying drawings.


REFERENCES:
patent: 3251019 (1966-05-01), Cimino
patent: 4582374 (1986-04-01), Conrad et al.
patent: 5103378 (1992-04-01), Stowers et al.
patent: 5741155 (1998-04-01), Herman

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