Connector

1. A connector comprising a plug having a plug body and a socket having a socket body, wherein the plug and the socket are connected to each other by inserting the plug and the socket in an axial direction,

wherein either one of the plug body and the socket body is a male body provided with an insertion portion having a circular outer peripheral surface, and the other is a female body provided with a cylindrical portion into which the insertion portion of the male body can rotatably fit into the cylindrical portion,

wherein an outward protrusion is provided on a part of outer peripheral surface of a distal end portion of the insertion portion of the male body,

wherein a plurality of inward ridges and an inclined cam surface are provided on an inner surface of the cylindrical portion of the female body,

wherein a groove through which the outward protrusion can pass in the axial direction is formed between each of the adjacent ridges, wherein, when the insertion portion is inserted into the cylindrical portion in the axial direction and the outward protrusion contacts with the inclined cam surface, the male body and the female body are relatively rotated and are positioned at a regular position in a rotational direction around a center axis line of the connector,

wherein a plurality of electrical, optical or fluid connecting means are respectively provided at an opposing portion of the male body and the female body and those connecting means are connected to each other in a state in which the male body and the female body are positioned at a regular position, and

wherein at least one of the plug body and the socket body is provided rotatable around a center axis of a cylindrical case and incapable of relatively moving in the central axial direction.

2. The connector according to claim 1 , wherein the distal end portions of each of the ridges is formed in a sharp pointed shape, and

wherein the distal end portions of the grooves formed between the adjacent ridges are expanded in the circumferential direction of the cylindrical portion of the female body.

3. The connector according to claim 1 , wherein a clearance in the axial direction is provided between the ridges on the inner surface of the cylindrical portion of the female body and the inclined cam surface so that the protrusion can pass in the circumferential direction of the cylindrical portion.

4. The connector according to claim 1 , wherein at least one of the plurality of ridges is continuous with a top portion of the inclined cam surface.

5. The connector according to claim 1 , wherein the connecting means comprises:

one or a plurality of pins are provided on one of the opposing faces of the plug body and the socket body and facing in the axial direction, and

wherein one or a plurality of receiving members are provided on the other of the opposing faces and configured partially in contact with the respective pin.

6. A connector comprising a plug, a socket, connecting means, and a cylinder tube, the plug has a cylindrical insertion portion, the socket is configured to be connected to the plug by inserting the insertion portion in an axial direction, the connecting means is an electrical, an optical or a fluid connecting means provided at each of opposed portions of the plug and the socket,

wherein the cylinder tube is connected to at least one of the plug and the socket rotatable around the axial direction,

wherein the plug has an outward protrusion protruding outward from a part of an outer peripheral surface of a distal end portion of the insertion portion,

wherein the socket has a cylindrical portion, a plurality of inwardly extending ridges provided on an inner peripheral surface of the cylindrical portion, and an inclined cam surface provided on an inner peripheral surface of the cylindrical portion, the cylindrical portion is configured such that the insertion portion can be inserted in the axial direction while rotating around the axis line,

wherein, between each of the adjacent ridges, a groove through which the outward protrusion can pass in the axial direction is formed,

wherein, when the insertion portion is inserted in the cylindrical portion in the axial direction, the protrusion slidably contacts with the inclined cam surface and the socket is rotated relative to the plug so that the socket and the plug are positioned at a regular position in a rotational direction around a center axis line of the connector,

wherein, when the plugs and the socket are positioned at the regular position, the connecting means are connected to each other,

wherein the cylinder tube has a predetermined length in the axial direction such that any of electrical, optical or fluid conducting means connected to the connecting means can be passed through the cylinder tube, and

wherein a connecting member capable of rotating on the outer peripheral surface of the distal end portion around the axis line is provided at the distal end portion of the cylinder tube, and wherein, in a state where the plug and the connector are connected to each other, the connecting member is engaged with an engaging portion provided in the plug or the connector in the axial direction.

7. The connector according to claim 6 , wherein the distal end portions of each of the ridges is formed in a sharp pointed shape, and

wherein the distal end portions of the grooves formed between the adjacent ridges are expanded in the circumferential direction of the cylindrical portion of the female body.

8. The connector according to claim 6 , wherein a clearance in the axial direction is provided between the ridges on the inner surface of the cylindrical portion of the female body and the inclined cam surface so that the protrusion can pass in the circumferential direction of the cylindrical portion.

9. The connector according to claim 6 , wherein at least one of the plurality of ridges is continuous with a top portion of the inclined cam surface.

10. The connector according to claim 6 , wherein the connecting means comprises:

one or a plurality of pins are provided on one of the opposing faces of the plug body and the socket body and facing in the axial direction, and

one or a plurality of receiving members are provided on the other of the opposing faces and configured partially in contact with the respective pin.