A watertight joint and a plug-in device are provided. The watertight joint includes a gland, a plug, an end cap and a sleeve cover, wherein the end cap includes a cable, a wrapping body and a sealing ring, wherein the wrapping body is wrapped on the cable and in a cone-shaped structure, and the sealing ring is sleeved over the second end of the wrapping body, the plug is fixedly connected to the port of the cable, the sleeve cover and the gland are sleeved over the wrapping body, opposite to each other, and the sleeve cover and the gland are in threaded connection, and the inner wall of sleeve cover abuts on the sealing ring.

A watertight joint and a plug-in device are provided. The watertight joint includes a gland, a plug, an end cap and a sleeve cover, wherein the end cap includes a cable, a wrapping body and a sealing ring, wherein the wrapping body is wrapped on the cable and in a cone-shaped structure, and the sealing ring is sleeved over the second end of the wrapping body, the plug is fixedly connected to the port of the cable, the sleeve cover and the gland are sleeved over the wrapping body, opposite to each other, and the sleeve cover and the gland are in threaded connection, and the inner wall of sleeve cover abuts on the sealing ring.

The invention provides a plug for an electronic plucked string instrument having a structure for fixing with a set screw by inserting a cable into a sleeve in a plug side. A biting convex portion biting into an insulated outer sheath while receiving a screwing compression force of a set screw via a cable is formed integrally on an inner peripheral surface of an attachment sleeve in a plug side along a peripheral direction of a sleeve inner peripheral surface. The biting convex portion formed on the inner peripheral surface of the attachment sleeve in the plug bites into the insulated outer sheath of the cable. Thus, a slip displacement against a sleeve inner surface of the cable is inhibited by the biting convex portion and a slack of the set screw can be effectively suppressed even in a case where a stronger tensile force is applied to the cable.

The invention provides a plug for an electronic plucked string instrument having a structure for fixing with a set screw by inserting a cable into a sleeve in a plug side. A biting convex portion biting into an insulated outer sheath while receiving a screwing compression force of a set screw via a cable is formed integrally on an inner peripheral surface of an attachment sleeve in a plug side along a peripheral direction of a sleeve inner peripheral surface. The biting convex portion formed on the inner peripheral surface of the attachment sleeve in the plug bites into the insulated outer sheath of the cable. Thus, a slip displacement against a sleeve inner surface of the cable is inhibited by the biting convex portion and a slack of the set screw can be effectively suppressed even in a case where a stronger tensile force is applied to the cable.

A rotary plug electrical connector includes a plug and a socket, both of which include power contacts and signal contacts. The plug is rotatable within the socket between operable and inoperable positions. The power contacts of the socket include opposed surfaces which are engaged by resilient blade power contacts of the plug. The signal contact of the socket preferably includes a pair of contacts, and the signal contact of the plug preferably is a bridge contact that engages the socket signal contacts in the operable position and disengages the socket signal contacts in the inoperable position. When the signal contacts are disengaged, no power is transferred by the connector.

A terminal assembly includes a male terminal structure and a female terminal structure. The male terminal structure includes a male terminal body, a first terminal member, and a free terminal member. The first terminal member is disposed at the male terminal body. The free terminal member is disposed at the male terminal body and detachably in contact with the first terminal member. The female terminal structure includes a female terminal body, an extension portion, a tunnel, a second terminal member, and a secured terminal member. The extension portion is protruding from the female terminal body. The tunnel is recessed from the extension portion. The second terminal member is disposed at the female terminal body and received in the tunnel. The secured terminal member is disposed at the female terminal body, spaced from the second terminal member, and disposed on the extension portion.

A connection method of an RF cable end connector and a coaxial cable and an internal terminal used thereof are provided. An insulator is formed outside a body of the internal terminal by embedded molding, making the internal terminal have a composite structure integrated with the insulator. The internal terminal can be connected to the coaxial cable by, for example, clamping. This allows connection between the RF cable end connector and the coaxial cable to be easily accomplished by automatic processes, thereby reducing fabrication costs of RF cable end connector jumpers.

A connection method of an RF cable end connector and a coaxial cable and an internal terminal used thereof are provided. An insulator is formed outside a body of the internal terminal by embedded molding, making the internal terminal have a composite structure integrated with the insulator. The internal terminal can be connected to the coaxial cable by, for example, clamping. This allows connection between the RF cable end connector and the coaxial cable to be easily accomplished by automatic processes, thereby reducing fabrication costs of RF cable end connector jumpers.

A cartridge includes an outer case, partially filled with electrically insulating gel, and at least one electrically conductive track submerged in the insulating gel. Connection sets including at least one connector half and such a cartridge are also disclosed.

An underwater connector half includes a base and at least two electrical connection terminals respectively connected to two electric wires received in at least one cable. The two electrical connection terminals are ring-shaped and coaxial about an axis located along a direction of assembly of a complementary connector half and the base has a side wall that is parallel to the axis and through which passes the cable. An underwater connector including such a connector half is also disclosed.