초록 ▼

Plug-in circuit packs, as used in telecommunications systems are planar assemblies which slide into position in a support frame, with electrical connections usually made at the inner or rear end. Assistance in withdrawal, and latching when in position are provided by a latching and withdrawing assem

Plug-in circuit packs, as used in telecommunications systems are planar assemblies which slide into position in a support frame, with electrical connections usually made at the inner or rear end. Assistance in withdrawal, and latching when in position are provided by a latching and withdrawing assembly at the front end of the circuit pack, having an integrally molded spring cantilever, free at its forward end and having an outwardly extending projection at its free end, the cantilever defining a channel in which slides an actuator. The actuator has spaced side members joined at an inner end by a cylindrical member which slides in the channel. Flange members are formed on the inner end of each side member. Rotation of the actuator at its outermost position causes the flange members to bear on the free end of the cantilever to deflect it. This disengages the outwardly extending projection at the free end of the cantilever from a detent in the support frame. Projections on the side members bear against the support frame and bias the circuit pack out of the support frame.

대표청구항 ▼

A circuit pack for insertion into a support frame, the pack comprising a frame having front and back edges and spaced apart end frame members extending from said front edge to said back edge, and a latching and withdrawal assembly on each end frame member adjacent said front edge, each latching and

A circuit pack for insertion into a support frame, the pack comprising a frame having front and back edges and spaced apart end frame members extending from said front edge to said back edge, and a latching and withdrawal assembly on each end frame member adjacent said front edge, each latching and withdrawal assembly comprising: a spring cantilever member extending parallel to said end frame member, said cantilever member integral at a rear end with said end frame member and free at its forward end, the cantilever member and said end frame member defining a channel; a projection at said free end of said cantilever member, the projection extending in a direction away from said end frame member; a projection on said end frame member positioned forward of and aligned with said cantilever member, and including an arcuate recess facing towards said channel; an actuator slidably mounted in said channel, said actuator having two spaced parallel arms joined at an inner end by a cylindrical member and joined at their outer ends by a transverse web, the cylindrical member positioned in and sliding in said channel from an inner position to an outer position, the cylindrical member positioned in said arcuate recess in its outer position; said actuator pivotable in its outer position, whereby an abutment at said inner end of said actuator is moved into engagement with said free end of said cantilever member to depress the cantilever member and release said projection at said free end from a detent in said support frame, and said actuator bears on a surface of said support frame to urge said circuit pack from said support frame.