JPH07245156A - Connector for coaxial cable - Google Patents

Abstract

PURPOSE:To ensure contact of a connector body with the base cylinder of a ferrule fitted in the body by furnishing a spring piece made of an electroconductive material in which resilience cylinder 13 is inserted between an outer conductor 18 and CONSTITUTION:An inserting cylinder 13 is inserted between an outer conductor 18 and an inner insulative substance 19, and the end of a coaxial cable A fitted with a ferrule 7 in continuity to the cylinder is inserted in a connector body 1. When the base cylinder 8 of the ferrule is fitted in a threaded cylinder 9 of the body 1, the ferrule is installed to the body 1 certainly by a projection 12 on a spring piece 11 retained with a groove 10 furnished at the inside of the cylinder. At the same time, the center conductor 17 protruding from the cable A is inserted into a central contact 5. When a fastening metal piece 3 in screw engagement with the body 1 is fastened, a shield sleeve 15 is diametrically contracted in the axial direction, and the cable A is grasped strongly, and the sleev 15 moves to the inside. This generates certain connection of the ferrule with body 1 and the conductor 17 with the contact 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coaxial cable connector.

[0002]

2. Description of the Related Art In order to connect electricity flowing through an outer conductor of a coaxial cable to equipment such as an amplifier, a ferrule is inserted between the outer conductor and an inner insulator, and a base tube of the ferrule is inserted. A coaxial cable connector having a structure for engaging the inside of a connector body and screwing a tightening fitting to the connector body is known, for example, as disclosed in Japanese Utility Model Publication No. 2-5504. The ferrule is pressed against the connector body by its thrust by tightening the fastening metal fitting on the connector body, and the electrical connection state is maintained by the surface pressure.

[0003]

The electrical connection between the ferrule and the connector main body in the above-mentioned conventional example is based on the contact pressure utilizing the thrust generated by the screw engagement between the connector main body and the tightening metal fitting. A slight looseness of the screwed state of the connector body and the tightening fitting due to vibration caused by wind pressure or the like causes the thrust to be extremely reduced, the contact pressure between the two is significantly impaired, and there is a problem that transmission characteristics are impaired.

There are techniques aimed at preventing this loosening, but all of them are for assembling parts having a complicated structure and are poor in production efficiency and expensive, so that they are not widely used. .

The present invention pays attention to such a point, and surely maintains the contact state between the ferrule and the connector main body to prevent the electrical characteristics from being impaired due to poor contact, and further, to provide an inexpensive coaxial cable connector. It is intended to be provided.

[0006]

A spring piece made of a conductive material that is elastic in the radial direction of a coaxial cable is interposed between a connector body and a base tube of a ferrule engaged with the inside of the connector body. Configure.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of a coaxial cable connector according to the present invention. FIG. 1 is a partially cutaway side view showing a usage state, FIG. 2 is a side view of a spring piece, and FIG. 3 is a front view thereof. is there.

In the figure, 1 is a connector main body, 2 is a mounting nut rotatably assembled to one end of the connector main body 1, and 3 is a fastening metal fitting screwed to the other end.

A first insulator 4 is fitted and fixed to the mounting nut 2 side of the connector body 1 so that the first insulator 4 supports the tip end side of the center contact 5 arranged on the axis of the connector body 1. The rear side of the center contact 5 is engaged with a pressure ring 6 (insulator) which also serves as an insulator, and the pressure ring 6 is brought into contact with the base tube 8 of the ferrule 7 engaged with the connector body 1 inside.

The connector body 1 screwed with a tightening fitting 3
A concave groove 10 is provided inside the screw cylinder 9 along the inner peripheral surface 9a, and a spring piece 11 is fitted and locked in the concave groove 10 so that a protruding piece 12 of the spring piece 11 is formed on the inner peripheral surface. The ferrule base barrel 8 is inserted into and engaged with the screw barrel 9 of the connector body 1 so that the ferrule base barrel 8 is projected from the inner side of the screw barrel 9a toward the inner side of the screw barrel and is held by the projecting pieces 12, 12 ,.

The ferrule 7 comprises a base tube 8 and an insertion tube 13 having an outer diameter narrower than that of the base tube 8. The flange 14 is provided between the tubes 8 and 13, and the flange 14 is connected to the connector body 1. The base cylinder 8 is inserted and engaged with the screw cylinder 9 so as to be locked to the end of the screw cylinder 9.

Further, the spring piece 11 is made of a conductive metal strip having a circular ring shape in a front view, and a large number of the protruding pieces 12, 12, ... ,
Between the ferrule base barrel 8 inserted into the screw barrel 9 and the screw barrel 9, the protrusion pieces 12, 12, ... Are projected from the inner peripheral surface 9a of the screw barrel 9 by fitting and locking in the groove 10. The ferrule base tube 8 is sandwiched and held.

Further, FIG. 15 shows a shield sleeve (insulator) which holds the coaxial cable A inserted in the tightening fitting 3 together with the jacket 16, and the sleeve 15 has its tip end side contacting the rear end surface of the flange 14 of the ferrule 7. It has a contact surface 15a in contact with it, and a tapered surface 15b is formed on the outer peripheral portion so as to be in sliding contact with the tapered surface 3b provided on the inner circumference of the fastening fitting.

Then, the end portion of the coaxial cable A having the ferrule 7 assembled by inserting the insertion tube 13 between the outer conductor 18 and the inner insulator 19 after inserting appropriate end treatment into the connector body 1 is inserted. When the base tube 8 of the ferrule 7 is fitted into the screw tube 9 of the connector body 1, the ferrule 7 is caused by the projection piece 12 of the spring piece 11 assembled inside the screw tube.
Is securely assembled to the connector body 1, and the central conductor 17 protruding from the tip of the coaxial cable is inserted into the central contact 5. After that, when the tightening metal fitting 3 is screwed into the connector body 1 and tightened, the taper surface 3b formed on the inner surface of the tightening metal fitting 3 is brought into sliding contact with the taper surface 15b of the shield sleeve 15 and the shield sleeve 15 is axially moved. The diameter of the coaxial cable A is reduced to strongly grip the coaxial cable A, and the shield sleeve 15 is moved inward of the connector body 1. At that time, the protruding piece of the spring piece 11 housed inside the screw tube 9 of the tightening fitting. 12 is securely connected to the base tube 8 of the ferrule 7, a stable electrical connection to the connector body is secured, and the contact surface 15a of the shield sleeve 15 is the rear end surface of the flange 14 of the ferrule 7. Will be pressed. By this pressing action, the tip of the base tube 8 of the ferrule 7 presses the pressing ring 6 this time, and the connection between the center conductor and the center contact 5 is also made.

[0015]

According to the present invention, the coaxial cable is made of a conductive material which is interposed between the connector body and the base tube of the ferrule engaged with the inside of the connector body and which imparts elasticity in the radial direction of the coaxial cable. Due to the spring effect of the spring piece, the electrical connection between the ferrule and the connector body can be stably maintained even if looseness occurs between the tightening fitting and the connector body, without impairing the transmission characteristics for a long time, and Also, it is possible to prevent leakage or mixing of radio waves, and moreover, since the structure of the spring piece is extremely simple and highly productive, it can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a usage state.

FIG. 2 is a side view of a spring piece.

FIG. 3 is a front view of a spring piece.

[Explanation of symbols]

 1 Connector body 8 Ferrule base tube 11 Spring piece

Claims (2)

[Claims] 1. A coaxial cable in which a spring piece made of a conductive material that is elastic in the radial direction of the coaxial cable is interposed between a connector body and a ferrule base tube engaged with the inside of the connector body. Connector. 2. A connector for a coaxial cable according to claim 1, wherein a strip surrounding the base tube of the ferrule is partially cut and raised, and a plurality of projecting pieces are arranged in a row along the longitudinal direction to form a spring piece. .