Electrical connectors – Interrelated connectors relatively movable during use – Movement about axis
Reexamination Certificate
1999-06-29
2002-08-06
Sircus, Brian (Department: 2839)
Electrical connectors
Interrelated connectors relatively movable during use
Movement about axis
C439S022000
Reexamination Certificate
active
06428325
ABSTRACT:
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to a connector device for use with a connector device of a telephone cord for connecting a telephone body and a handset, for example.
Description of the Prior Art
Except so-called cordless telephones, a telephone body and a handset are joined by a cord comprising a bundle of a plurality of conductors, and circuits within the telephone body and circuits within the handset are connected electrically.
Most of telephone cords are of curl cord type in which a cord is molded in a coil-like shape in advance so as to become expanded and contracted when a telephone is in use.
However, the above-mentioned curl cord is easily twisted. In particular, when the curl cord is twisted like a so-called double coil, it becomes cumbersome for a user to extend the twisted curl cord up to the full length that the curl cord can be extended. Further, when the joint portion of the telephone body and the curl cord is twisted, there is the risk that the curl cord will be broken.
In order to prevent a bad effect from being caused when the curl cord is twisted as described above, heretofore, there have been developed a variety of telephone connector devices which are referred to as a handset cord twist prevention device. This connector device is of the type fitted into the cord (curl cord) for joining the telephone body and the handset.
FIG. 1
of the accompanying drawings is a perspective view illustrating an example of such a prior-art connector device.
As shown in
FIG. 1
, this connector device, generally depicted by reference numeral
100
, comprises a connector case
101
having approximately a cylindrical shape, a connection member
110
which can be freely rotated around the axis of the case
101
, a modular cord
102
comprising four conductors extendable from the rear end portion of the connection member
110
and a modular connector
103
joined to the rear end portion of this modular cord
102
. In the following description, the side of the modular connector
103
of the connector device
100
will be referred to as the rear side, and the opposite side of the modular connector
103
will be referred to as the front side. In this case, an insertion aperture
101
a
having a predetermined inner diameter is defined in the inner peripheral surface of the rear end side of the connector case
101
. The connection member
110
is located such that apart of a connection member rear portion
111
forming the rear half portion of the connection member
110
is projected from the insertion aperture
101
a
. The projected portion of the connection member
110
is a rear half portion
111
a
of the connection member rear portion
111
. The transverse section of the rear half portion
111
a
has an outer form which is shaped as approximately an oval-shaped cylinder.
As shown in
FIG. 2
, the connector device
100
has a housing
130
secured to the inside of the connector case
101
to support the connection member
110
together with the connector case
101
. The front half portion of the housing
130
is formed with a modular socket
131
, and the modular socket
131
includes four modular terminals
132
,
133
,
134
,
135
. Also, the housing
130
includes four terminal arrangement slots
136
a
,
136
b
,
136
c
,
136
d
in which the modular terminals
132
,
133
,
134
,
135
are located respectively. From the terminal arrangement slots
136
a
to
136
d
, there are projected the modular terminals
132
,
133
,
134
,
135
in substantially the rear direction to form inclined portions
132
b
,
133
b
,
134
b
,
135
b
of the same length.
The in construction of the connection member
110
and the housing
130
comprising the connector device
100
will be described with reference to FIG.
3
. As shown in
FIG. 3
, the connection member
110
is formed of three portions each molded by a synthetic resin and which are connected together coaxially. The connection member
110
comprises the connection member rear portion
111
including the rear half portion
111
a
, a cylindrical front half portion
111
b
and a disk-like flange
111
c
located at approximately an intermediate position of the outer peripheral surface of the front half portion
111
b
, a connection member front portion
112
including a disk portion
112
a
and a thin disk-like fitting protruded portion
112
b
formed at the rear surface of the disk portion
112
a
and a connection member intermediate portion
113
including a disk portion
113
a
whose size is the same as that of the disk portion
112
a.
Moreover, the connection member
110
includes disk-band-like terminal plates
114
,
115
,
116
,
117
having outer diameters which are approximately the same as those of the disk portions
112
a
,
113
a
and the flange portion
111
c
at predetermined positions between the disk portion
112
a
, the disk portion
113
a
and the flange portion
111
c
. To terminal plates
114
to
117
, there are respectively connected one ends of four conductors
102
a
,
102
b
,
102
c
,
102
d
of the modular cord
102
by soldering in the inside. The connection member
110
has respective support rings
118
,
118
′ of approximately annular shapes seen in the front to rear direction outwardly fitted into the front portion of a connection member intermediate portion
113
and the front portion of the flange portion
111
c
. The respective support rings
118
,
118
′ have lower half portions
118
a
,
118
′
a
in which four engagement protrusions
119
a
,
119
b
,
119
c
,
119
d
are protruded at respective ends in the circumferential directions of the outer peripheral surfaces. In the support rings
118
,
118
′, the upper half portion
118
b
,
118
′
b
and the lower half portions
118
a
,
118
′
a
have different predetermined thickness and predetermined radius at the outer peripheral surface.
In the housing
130
, respective portions are integrally molded by synthetic resin. The front portion of the housing
130
is comprised of a modular socket
131
and other portions are comprised of a support portion
137
which support the support rings
118
,
118
′ and the connection member
110
. The support portion
137
comprises an intermediate wall
138
and a connection member arrangement portion
139
. The intermediate portion
138
comprises a circular support aperture
138
a
defined at approximately a central portion, a recess groove
138
b
extended in the upper and lower direction and whose lower end is extended to the support aperture
138
a
and whose upper end is extended to the upper end of the intermediate wall
138
, two recess grooves
138
c
,
138
d
extended in the upper and lower direction and which are located at right and left positions of the recess
138
b
and an engagement pawl
138
e
. On an inner peripheral surface
139
a
of the connection member arrangement portion
139
, there are formed two engagement grooves
140
a
,
140
b
spaced apart from each other in the front and rear direction and extended along the peripheral direction and which are engaged with outer peripheral portions of the lower half portions
118
a
,
118
′
a
of the support rings
118
,
118
′. Further, the connection member arrangement portion
139
has on its peripheral wall formed four engagement apertures
141
a
,
141
b
,
141
c
,
141
d
of approximately rectangular shapes which are engaged with the four engagement protrusions
119
a
,
119
b
,
119
c
,
119
d
, respectively.
The connection member arrangement portion
139
has at its predetermined positions formed four terminal insertion apertures
142
,
143
,
144
,
145
(only the terminal insertion aperture
144
is shown in
FIG. 3
) corresponding to the four modular terminals
132
,
133
,
134
,
135
. From these terminal insertion apertures
142
,
143
,
144
,
145
, there are projected erect portions
132
c
,
133
c
,
134
c
,
135
c
of approximately the same length which are upwardly extended from the rear ends of the respective modular terminals
132
,
Adachi Shizuo
Hasegawa Nobuji
Kurosawa Shunmei
Rokuhara Takahisa
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