JPH0621176U - Device for holding the cable outer conductor in the coaxial cable connector - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a connector that securely holds an outer conductor of a coaxial cable. [Structure] An engagement step portion 7 is provided on an inner peripheral surface of a connector body 1, and a tip portion of a clamp ring 4 which is deformed by moving along a tapered surface c of the step portion 7 is provided on the engagement step portion 7. Engage. A notch 8 along the axial direction is formed on the circumferential side near the rear end of the clamp ring 4 to provide a gripping piece 9, and the gripping piece 9
The outer conductor 24 of the coaxial cable is clamped by.
The holding piece 9 is a tightening fitting 3 screwed into the connector body 1.
The outer conductor 24 is clamped by being deformed by the pressing ring 5 that moves forward.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a holding device for a cable outer conductor in a coaxial cable connector.

[0002]

[Prior art]

 As means for holding the inner conductor of the coaxial cable by the center contact housed inside at the tip end side of the connector body and the outer conductor of the coaxial cable at the rear end side, for example, Japanese Utility Model Publication No. 2-5504. There is one with the structure shown.

In this structure, the pressure receiving ring and the clamp ring are housed in the tightening metal fitting adjacent to the pressure receiving ring, and the rear end of the connector body is screwed into the tightening metal fitting to tighten the tightening metal fitting. While moving inside the tightening bracket, the cut-in cylinder part of the clamp ring is forcibly bent by the funnel-shaped inner edge of the pressure-receiving ring and bites into the jacket of the coaxial cable to hold the outer conductor side of the coaxial cable. It is something that is done.

[0004]

[Problems to be solved by the device]

 Depending on the application, it is essential for this type of connector to prevent leakage of transmitted radio waves, splashing of external radio waves, and watertightness. Moreover, its characteristics are to be maintained for a long time. An example is to make the cut-out cylinder of the clamp ring bite into the jacket of the coaxial cable, and this biting pressure through the insulator will maintain the electrical contact between the outer conductor and the reinforcing sleeve placed inside the outer conductor. However, since the inner surface of the outer conductor and the inner surface of the reinforcing sleeve are pressed against each other through the elastic outer cover, it is inevitable that they cannot contact each other over the entire circumference. Leakage or dive may occur, and if tension is applied to the coaxial cable by wind pressure or other external force, the jacket may be damaged.As a result of long-term use, the damage may be caused by this damage. Loosening observed state, or electrical characteristics are impaired by, for example, the outer conductor is slid relative to the reinforcing sleeve, there is a possibility that water-tightness is impaired.

The present invention was devised for the purpose of eliminating the drawbacks of the conventional example.

[0006]

[Means for Solving the Problems]

 On the inner peripheral surface of the connector body, in the connector for coaxial cable, the inner conductor of the coaxial cable is held by the center contact housed inside at the tip side of the connector body, and the outer conductor of the coaxial cable is held at the rear end side. An engaging step portion is provided on the engaging step portion, and the tip portion of the clamp ring that moves along the tapered inner surface of the step portion and deforms is engaged with the engaging step portion, and the engaging step portion is provided on the circumferential side near the rear end of the clamp ring. Insert a plurality of notches along the axial direction of the clamp ring to provide a gripping piece, and on the outside of the gripping piece, move forward with a tightening fitting screwed into the connector body and press-contact the clamp ring piece. It is configured by arranging the tip of the pressing ring.

[0007]

[Action]

 When the tightening member is tightened, the pressing step portion arranged inside the tightening member presses the pressing ring, and the pressing ring moves toward the connector body.

Since the tapered surface provided on the rear outer surface of the clamp ring is disposed in contact with the tapered surface provided on the inner peripheral surface of the tip of the pressing ring, the clamp ring is pressed by the pressing ring, and as a result, The outer peripheral surface of the taper provided on the tip of the clamp ring is deformed along the taper while maintaining contact with the inner peripheral surface of the taper provided on the engaging step of the connector body over the entire circumference, and the outer conductor of the coaxial cable is deformed. Closely adheres to the entire outer circumference, while the rear end of the clamp ring is also deformed inward by the friction between the tapered surface provided on the outer peripheral surface of the holding part and the tapered surface provided on the inner peripheral surface of the pressing ring tip, Each of the holding pieces is pressed so as to fit into the outer peripheral surface of the outer conductor of the coaxial cable, and the outer conductor is strongly held.

[0009]

【Example】

 The drawings show an embodiment of a device for holding a cable outer conductor in a coaxial cable connector according to the present invention. FIG. 1 is a vertical sectional view and FIG. 2 is a partially enlarged vertical sectional view.

In the figure, 1 is a connector body, 2 is a mounting bracket, 3 is a fastening bracket, respectively, a mounting bracket 2 is at the tip of the connector body 1, and a fastening bracket 3 is at the rear end of the connector body 1. Each is screwed and assembled.

A clamp ring 4, a pressing ring 5 and a gasket 6 are sequentially housed between the connector body 1 and the tightening fitting 3 with the clamp ring 4 on the connector body 1 side, and the clamp ring 4 has a large outer shape. The front and rear ends of the diametrical middle part are gradually tapered, and tapered outer peripheral surfaces a and b are applied to the front end and the rear end, respectively. The front end portion 4a is engaged, and the inner peripheral surface of the front end portion 4a is provided with a protrusion 25. The rear portion protruded from the engagement stepped portion 7 is axially provided at four positions at equal intervals on the peripheral side. A notch 8 is formed so as to form a holding portion piece 9, 9 ... And a sawtooth-shaped unevenness 10 is formed on the inner peripheral surface of the holding portion piece 9.

The engaging stepped portion 7 formed in the connector body 1 has a funnel shape in section which is gradually tapered toward the innermost end, and the tapered inner peripheral surface c of the stepped portion 7 has The rising angle is larger than that of the tapered outer peripheral surface a.

The pressing ring 5 accommodated in the connector main body 1 or the tightening fitting 3 adjacent to the clamp ring 4 has a male screw 11 provided on the outer peripheral surface of the tip portion 5 a on the inner peripheral surface of the rear end portion of the connector body 1. It is threadedly passed through the provided female screw 12 and is assembled so as to be movable relative to the connector body 1, and the inner peripheral surface of the tip portion 5a inserted into the connector body 1 is gradually expanded in the tip direction. A taper surface d having a smaller rising angle than the taper outer peripheral surface b of the clamp ring 4 is formed, and the holding portion piece 9 of the clamp ring 4 is engaged with the taper surface d while protruding from the connector body 1. A pressure receiving step portion 13 is formed on the outer peripheral surface of the rear end portion, and a pressure step portion 14 formed on the inner peripheral surface of the intermediate portion of the fastening fitting 3 is engaged with the pressure receiving step portion 13.

The gasket 6 has the fastening member 3 interposed between the pressing rings 5.

A first insulator 15, a second insulator 16, and a third insulator 17 are sequentially arranged from the tip side to the mounting bracket 2 assembled at the tip of the connector body 1, and between the insulators. The center contact 18 is arranged, and the center contact 18 is deformed by the deforming action of the third insulator 17 by the fourth insulator 19 pressed against the connector body 1 and holds the inner conductor 20.

Reference numeral 21 is a cylindrical reinforcing sleeve that is attached to the inner peripheral surface of the outer conductor 24 of the coaxial cable 22 so as to be assembled.

Then, the outer conductor 24 having the reinforcing sleeve 21 assembled therein is inserted into the connector body 1 through the gasket 6, the pressing ring 5 and the clamp ring 4, and then the fastening metal fitting 3 is screwed into the connector body 1. When tightened, the pressing ring 5 is initially pressed toward the gasket 6 and presses the clamp ring 4.

When the tightening operation is continued, the gasket 6 is deformed to press the outer jacket of the coaxial cable 22 to keep watertightness, while the pressing step portion 14 contacts the pressure receiving step portion 13 to press the pressing ring 5. The pressing action of the tightening metal fitting 3 against the taper is increased, and as a result, the taper outer peripheral surface b of the tip end portion 4a of the clamp ring 4 which is in contact with the taper surface c in the tip end surface of the pressing ring 5 and the taper surface c. The tape is further pressed while being in contact with the circumference, is deformed along the inner peripheral surface c of the taper, and is brought into close contact with the entire circumference of the outer conductor 24.

On the other hand, the rear end side of the clamp ring 4 is deformed inward by sliding the taper surface provided on the outer peripheral surface of the holding portion piece and the taper surface provided on the inner peripheral surface of the tip portion of the pressing ring, and deformed inward. Each of the pieces is pressed against the outer conductor of the coaxial cable so as to fit into the outer periphery of the coaxial cable, and the outer conductor is strongly clamped to complete the holding work.

[0020]

[Effect of device]

 In the present invention, the clamp ring is provided on the tip end side with the taper provided on the engagement outer step surface of the tip end portion and the connector body due to the pressing force of the pressing ring generated by the screwing of the fastening metal fitting to the connector body. Due to the sliding contact with the inner peripheral surface, the tip portion is deformed while closely adhering to each other over the entire circumference, and the deformed tip portion is adhered to the outer conductor of the coaxial cable also over the entire circumference, so that the outer conductor , The clamp ring, and the connector main body have perfect electrical connections to prevent radio wave leakage or jumping in, and at the rear end of the clamp ring, the component force of the pressure of the pressure ring causes By gripping the outer conductor by making sure that each of the sandwiching pieces provided with a plurality of notches deforms inwardly, and each bites into the outer conductor. It can provide a connector which reliably corresponds to the tensile force exerted by the wind pressure and other external forces.

[Brief description of drawings]

FIG. 1 is a vertical sectional view.

FIG. 2 is a partially enlarged vertical sectional view.

[Explanation of symbols]

 1 Connector body 3 Tightening metal fittings 4 Clamp ring 5 Pressing ring 7 Engaging step portion 8 Notch 9 Holding part piece

Claims (1)

[Scope of utility model registration request] 1. A coaxial cable connector in which an inner conductor of a coaxial cable is held by a center contact housed inside at a tip end side of a connector body, and an outer conductor of the coaxial cable is held at a rear end side thereof.
An engagement step is provided on the inner peripheral surface of the connector body, and the tip of the clamp ring, which moves along the tapered inner surface of the step to be deformed, is engaged with the engagement step, and the rear end of the clamp ring is engaged. A plurality of cuts along the axial direction of the clamp ring are provided on the side of the clamp ring to provide a holding part, and the outside of the holding part is moved forward by a tightening fitting screwed into the connector body to move the clamp ring. A device for holding a cable outer conductor in a connector for a coaxial cable, in which a tip portion of a pressing ring that is pressed against a piece is arranged.