A first sheet metal is provided with slits. Elastic pieces having flat shapes are each formed between the slits adjacent to each other, and both ends of each of the elastic pieces are connected with both ends of an adjacent one of the elastic pieces. A second sheet metal is provided with protrusions each of which is protruded toward a corresponding one of the elastic pieces.

Receptacles are provided for mating with plugs to establish electrical connections. The receptacles include a shell having a body, and a flange attached to the body. The flange has a projection extending therefrom. The receptacle also has an electrically-insulating insert positioned at least in part within the body; and one or more electrical contacts positioned at least in part within the insert. The receptacle is configured for mounting on a panel. The projection contacts a mounting surface of the panel, to establish a localized contact area that provides bonding between the receptacle and panel.

A first sheet metal is provided with slits. Elastic pieces having flat shapes are each formed between the slits adjacent to each other. and both ends of each of the elastic pieces are connected with both ends of an adjacent one of the elastic pieces. A second sheet metal is provided with protrusions each of which is protruded toward a corresponding one of the elastic pieces.

Receptacles are provided for mating with plugs to establish electrical connections. The receptacles include a shell having a body, and a flange attached to the body. The flange has a projection extending therefrom. The receptacle also has an electrically-insulating insert positioned at least in part within the body; and one or more electrical contacts positioned at least in part within the insert. The receptacle is configured for mounting on a panel. The projection contacts a mounting surface of the panel, to establish a localized contact area that provides bonding between the receptacle and panel.

Connector inserts and receptacles that are robust, easily manufactured, and provide an improved connector performance. One example may provide a connector receptacle having a power contact located in a ground surface. An insulating layer may be placed between the power contact and the ground surface. The ground surface may be curved or flat, or it may have other shapes. Another example may provide a robust connector insert. This connector insert may include a crimping piece that fits over a cable braiding and is crimped. The crimping piece may then be attached to an attraction plate. A cover or shell may be attached to provide further reinforcement. Another example may provide a connector system having a ground contact and a power contact, where the ground contact is a make-first-break-last contact.

Connector inserts and receptacles that are robust, easily manufactured, and provide an improved connector performance. One example may provide a connector receptacle having a power contact located in a ground surface. An insulating layer may be placed between the power contact and the ground surface. The ground surface may be curved or flat, or it may have other shapes. Another example may provide a robust connector insert. This connector insert may include a crimping piece that fits over a cable braiding and is crimped. The crimping piece may then be attached to an attraction plate. A cover or shell may be attached to provide further reinforcement. Another example may provide a connector system having a ground contact and a power contact, where the ground contact is a make-first-break-last contact.