JPH04329275A - Ft type connector - Google Patents

Abstract

PURPOSE:To completely block the entry of water from the center contact side and the coaxial cable side as well and prevent the leakage of electromagnetic waves by providing annular elastic substances, a flexible spring and gaskets for a FT type connector. CONSTITUTION:A fastener 11 to which an auxiliary fitting is connected is inserted into a coaxial cable A. Next, an inside conductor B at the end of the terminated coaxial cable A is inserted into the conduction acceptance section 7b of a center contact 7 which is mounted on a connector mainframe 1. Annular elastic substances 5, 6, prevent water from entering inside. At this time, a flexible spring 8 is forced to the inside wall face of an outside conductor D to ensure electric connection to a reinforcing sleeve 10. In addition, in fastening the connector mainframe 1 to the fastener 11, gaskets 15, 17 are used to completely block water from entering.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is based on JIS-C-5410 (
Designed to have a nominal impedance of 75Ω, a voltage of 1000V (effective value), and a voltage standing wave ratio (VSWR) of 1.2 or less at a frequency of 1000MHz for use in outdoor facilities for television communal reception based on the general rules for high-frequency coaxial connectors. This FT type connector is particularly applicable to cases where the outer conductor of a coaxial cable is hard, such as an aluminum pipe.

[0002] In a conventional FT type connector, a split taper clamp forms a notch along the entire length in the axial direction and is loosely fitted into the inner circumferential surface of the connector body near the rear end.
The reinforcing cylindrical ring whose remaining part protrudes outside and is located inside the fastening metal fitting and comes into contact with the claw body of the backup ring and is loosely fitted into the inner circumferential surface of the connector body near the rear end is inserted into the above-mentioned split. There is one that is attached to the outer circumferential surface of the inlet taper clamp (
(See Japanese Patent Publication No. 2-6198).

[0003] This device prevents the internal conductor of the coaxial cable from coming off, allowing the connector to be reused, or when the tightening fitting and the connector body are screwed together, it does not put stress on the threaded part of the two. This method has the advantage of being able to tighten the coaxial cable firmly without any damage, but if the worker cuts the outer jacket too long when processing the end of the coaxial cable, or if the gasket inside the clamping fitting is damaged during tightening. If the outer sheath is not pressed or is damaged for some reason, water or moisture may enter through the wound, and furthermore, there are insufficient measures to prevent leakage of radio waves within the connector body.

The present invention has been made in view of the above-mentioned points, and is intended to be used when a worker cuts the outer jacket too long when processing the end of a coaxial cable, or when a coaxial cable is cut inside a fastening fitting. Even if the gasket does not apply pressure to the outer sheath during tightening, or if the outer sheath is damaged for some reason, it completely seals out moisture such as water and moisture, and prevents radio waves from entering the connector body. An object of the present invention is to provide a highly reliable FT type connector that is free from leakage.

[0005] The FT type connector according to the present invention has a pin portion that partially protrudes to the outside by a first insulator fitted to the tip inside the connector body and a second insulator that abuts the first insulator. A cylindrical insulator with a split flange is provided on the outside of the conductor receiving portion of the held center contact, one end of which is in contact with the second insulator, and the other end of which has a tapered outer peripheral surface. An annular elastic body that presses the pin portion of the center contact is attached to the center of the front end of the second insulator, and an annular elastic body that presses the inner circumferential surface of the connector body is attached to the outer peripheral surface of the flange formed at the rear of the second insulator. A third insulator having a tapered surface on its inner circumferential surface that slides into contact with the tapered surface of the cylindrical insulator with a split flange is fitted into the connector body, and reinforcement is made of a cylindrical portion and a thick-walled flange. Three
The thick flange of the reinforcing sleeve is brought into contact with the third insulator, and a bending spring body is arranged along the axial direction at a predetermined interval near the base of the outer peripheral surface of the reinforcing sleeve. - The inner clamp located on the outside of the cylindrical part of the tube is formed with a cut-out so as to narrow in the center, and an uneven part is formed on the inner circumferential surface of the inner clamp, so that it can slide through the outer circumferential surface of the inner clamp and the tapered surface. A contacting outer clamp is loaded on the rear side of the connector body, a part of the outer clamp protrudes from the connector body, is located in the fastening fitting that connects with the connector body, and the outer conductor of the coaxial cable is attached to the rear of the outer clamp. Attach a gasket that suppresses the
In addition, there is a coaxial cable inside the auxiliary fitting connected to the rear of the tightening fitting.
It is equipped with a gasket that compresses the outer covering of the bull.

[0006]

[Operation] Before connecting a coaxial cable to a connector, either before or after the cable has been terminal-treated, insert a tightening fitting with an auxiliary fitting connected to the cable, and then connect the coaxial cable to the terminal-treated coaxial cable. Insert the tip of the internal conductor into the conductor receiving part of the center contact attached to the connector body. At this time, the pin part of the center contact located inside the connector body is pressed and sealed by the annular elastic body attached to the second insulator, and the pin part of the center contact located inside the connector body is pressed and sealed by the annular elastic body attached to the second insulator. The annular elastic body presses the inner peripheral surface of the connector body to prevent water from entering. When the inner conductor of the coaxial cable is inserted into the conductor receiving part of the center contact, the tip of the outer conductor of the coaxial cable fits into the outer peripheral surface of the cylindrical part of the reinforcing sleeve. The bending spring body disposed near the base of the outer peripheral surface of the cylindrical portion is pushed by the inner wall surface of the outer conductor and stretched in the axial direction, and presses against the inner wall surface of the outer conductor to establish an electrical connection with the reinforcing sleeve. becomes certain. Then, when the tightening fitting to which the auxiliary fitting is connected is moved and screwed onto the rear outer circumferential surface of the connector body for connection, the rear end surface of the outer clamp protruding from the connector body hits the step-like wall surface inside the tightening fitting. - The inner clamp is pushed through the surface.

[0007] When the inner clamp is pressed, the inner clamp narrows toward the center because it is formed with a cut-out, and the uneven portion formed on the inner circumferential surface of the inner clamp causes the outer conductor of the coaxial cable to narrow. It is fixed by biting into the outer circumferential surface. Also, when the inner clamp is pressed, the third insulator is pushed through the thick flange of the reinforcing sleeve and press-fits the cylindrical insulator with the split flange through the tapered surface. The inner peripheral surface of the cylindrical insulator is pressed against the outer peripheral surface of the conductor receiving part of the center contact, and the conductor receiving part firmly fixes the internal conductor. Furthermore, when the clamping fitting is attached to the connector body, the outer sheath of the coaxial cable is compressed by the gasket inside the auxiliary fitting, and the outer conductor of the coaxial cable is compressed by the gasket attached to the outer clamp, resulting in a water seal. Ru.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG. 2 is a side view thereof. Reference numeral 1 denotes a connector main body, in which an O-ring 2 for sealing is attached to the base of a threaded part 1b on the side that is threaded with a connecting tool K of a device, and an O-ring 2 is attached to the base of a threaded part 1a that is threaded with a tightening fitting 11 to be described later. are each provided with an O-ring 12 for sealing the metal fitting 11 and the main body 1. A columnar first insulator 3 having an insertion hole 3a for a center contact 7 is loaded at the tip end inside the connector body 1. As shown in FIG. A portion of the pin portion 7a of the center contact 7 protrudes from the connector body 1, and the conductor receiving portion 7b is recessed so that it can be narrowed.
An uneven portion 7c such as a screw is formed on the inner circumferential surface thereof.

Reference numeral 4 denotes a columnar second insulator that comes into contact with the first insulator 3, is fitted into the connector body 1, and has an insertion hole 4a for the center contact 7 in its center. Further, an annular elastic body 5 such as an O-ring is attached to the center of the front end of the second insulator 4 to press against the pin portion 7a of the center contact 7. Further, a flange portion 4b is formed integrally with the insulator 4 at the rear portion of the second insulator 4 so as to fit into the inner circumferential surface of the intermediate diameter formed in the connector body 1, and a flange portion 4b is formed integrally with the second insulator 4 on the outer circumferential surface of the flange portion 4b. An annular elastic body 6 such as an O-ring is attached to press against the inner peripheral surface of the connector main body 1 at an intermediate diameter. Reference numeral 8 designates a cylindrical insulator provided outside the conductor receiving portion 7b of the center contact 7 with a flange 8a. This insulator 8 has a collar 8a at one end that abuts against the second insulator 4, and a tapered surface 8b on the outer peripheral surface of the other end. Reference numeral 9 denotes a columnar third insulator fitted to the inner peripheral surface of the intermediate diameter formed in the connector body 1, and has an insertion hole 9a for the internal conductor B of the coaxial cable A in the center thereof. Further, the third insulator 9 has a tapered surface 9b formed on its inner circumferential surface so as to be in sliding contact with the tapered surface 8b of the cylindrical insulator 8 with a split flange.

Reference numeral 10 denotes a reinforcing sleeve consisting of a cylindrical portion 10a and a thick flange 10b, and is mounted within the connector body 1. The terminal end side of the cylindrical portion 10a partially protrudes from the connector main body 1, and the outer circumferential surface of the thick flange 10b is in sliding contact with the large diameter inner circumferential surface formed within the connector main body 1. The thick flange 10b is in contact with the end surface of the third insulator 9, and a groove is formed near the base of the outer peripheral surface of the cylindrical portion 10a of the reinforcing sleeve 10, and grooves are formed along the axial direction at predetermined intervals around the groove. A dogleg-shaped bending spring body 18 is disposed facing downward. Reference numeral 13 denotes an inner clamp located outside the cylindrical portion 10a of the reinforcing sleeve 10. A flange 13a formed at the front end of the inner clamp 13 is in contact with the thick flange 10b. The inner clamp 13 is formed with a cut in the center so as to narrow, and an uneven part 13b such as a screw is formed on the inner peripheral surface of the inner clamp 13, and a tapered surface 13c is formed on the rear outer peripheral surface of the inner clamp 13. form.

14 is located outside the inner clamp 13;
This is an outer clamp having a tapered surface 14a on the inside that makes sliding contact with the tapered surface 13c. The front outer peripheral surface of the outer clamp 14 is in sliding contact with the large diameter inner peripheral surface formed within the connector body 1,
The rear side protrudes from the connector body 1 and is caulked at the terminal end of the connector body 1 to prevent it from slipping out. Further, a gasket 15 for compressing the outer conductor D of the coaxial cable A is attached to the rear side of the outer clamp 14 protruding from the connector body 1. When the connector main body 1 and the fastening fitting 11 are connected, the gasket 15 is pushed by a vertical wall formed inside the fastening fitting 11 and presses the external conductor D. Reference numeral 16 denotes an auxiliary fitting connected to the rear part of the fastening fitting 11, and a gasket 17 for compressing the jacket E of the coaxial cable A is provided within the auxiliary fitting 16.

Next, a method of using an FT type connector showing an embodiment of the present invention will be described. Before connecting the coaxial cable A to the connector, insert the clamping fitting 11 to which the auxiliary fitting 16 is connected to the cable A either before or after the cable is terminally processed (see Fig. 3(a)). (See Figure 3(b)). After that, the inner conductor B at the tip of the coaxial cable A that has been terminal-treated is
into the conductor receiving portion 7b of the center contact 7 attached to the connector body 1. At this time, the pin portion 7a of the center contact 7 located inside the connector body 1 is pressed and sealed by the annular elastic body 5 attached to the second insulator 4.
Further, the inner circumferential surface of the connector body 1 is compressed by the annular elastic body 6 attached to the outer circumferential surface of the flange 4b of the second insulator 4, and the inner circumferential surface of the connector body 1 is compressed, and the pressure is applied to the inner circumferential surface of the insulator 3 through the outer circumferential surface of the insulators 3 and 4 and the pin portion 7a. Water entering the interior is completely blocked here.

When the inner conductor B of the coaxial cable A is inserted into the conductor receiving portion 7b of the center contact 7, the tip of the outer conductor D of the coaxial cable A is inserted into the cylindrical portion 1 of the reinforcing sleeve 10.
The cylindrical portion 10a of the reinforcing sleeve 10 is fitted onto the outer peripheral surface of the reinforcing sleeve 10.
The bending spring body 18 disposed near the base of the outer peripheral surface is the outer conductor D.
The inner wall surface of the outer conductor D is pressed against the inner wall surface of the outer conductor D while being stretched in the axial direction, thereby ensuring a reliable electrical connection with the reinforcing sleeve 10 and stabilizing the electrical characteristics. Then, when the tightening fitting 11 to which the auxiliary fitting 16 is connected is moved and screwed onto the rear outer circumferential surface of the connector body 1 for connection, the rear end surface of the outer clamp 14 protruding from the connector main body 1 is inserted into the inside of the tightening fitting 11. The inner clamp 13 is inserted through the tapered surfaces 14a and 13c while contacting the vertical wall surface forming a stepped shape.
is pressed. At the same time as the inner clamp 13 is pressed, since the inner clamp 13 is formed with a cut, the inner clamp 13 is narrowed toward the center, and the uneven portion 13b formed on the inner circumferential surface of the inner clamp 13 is formed on the outside of the coaxial cable A. It is fixed by biting into the outer peripheral surface of the conductor D.

Furthermore, when the inner clamp 13 is pressed,
The third insulator 9 is pushed through the thick flange 10b of the reinforcing sleeve 10, and is pressed against the cylindrical insulator 8 with the split flange a through the tapered surfaces 9b, 8b. The inner circumferential surface of the insulator 8 is pressed against the outer circumferential surface of the conductor receiving portion 7b of the center contact 7, and the internal conductor B is firmly fixed by the uneven portion formed inside the conductor receiving portion 7b. Furthermore, when the connector body 1 and the clamping fitting 11 are tightened, the outer sheath E of the coaxial cable A is attached to the gasket 17 in the auxiliary fitting 16, and the outer conductor D of the coaxial cable A is attached to the outer clamp 14. It is possible to completely seal off any water that may enter from the coaxial cable A side by being compressed by the gaskets 15 that have been installed (see Fig. 3(c)).
.

[0015]

[Effects of the Invention] Since the FT type connector according to the present invention has the above-mentioned structure, there is a possibility that the outer cover may be cut too long by the worker when processing the end of the coaxial cable, or the gasket in the clamping fitting may be tightened. Even if you do not apply pressure to the outer cover, or if the outer cover is damaged for some reason, it will completely prevent moisture such as water and moisture from entering from both the center contact side and the coaxial cable side. can. Moreover, the outer conductor of the coaxial cable and the reinforcing sleeve inside the connector body are
Since the contact with the connector is ensured through the bending spring body, a highly reliable FT type connector with no leakage of radio waves can be obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an FT type connector showing one embodiment of the present invention.

FIG. 2 is a side view of FIG. 1;

[Fig. 3] Fig. 3(a) is a cross-sectional view of coaxial cable terminal processing;
FIGS. 3(b) and 3(c) are cross-sectional views illustrating how to attach the FT type connector.

[Explanation of symbols]

1 Connector body 3 First insulator 4 Second insulator 5 Annular elastic body 6 Annular elastic body 7 Center contact 8 Cylindrical insulator 9 Third insulator 10 Reinforcement sleeve 11 Tightening metal fittings 13 Inner clamp 14 Outer clamp 15 Gasket 16 Auxiliary fittings 17 Gasket 18 Flexible spring body

Claims (1)

[Claims] [Claim 1] A conductor receiving part of a center contact in which a pin part partially protruding to the outside is held by a first insulator fitted to a tip part in a connector body and a second insulator abutting the first insulator. A cylindrical insulator with a split flange is provided on the outside of the second insulator with one end in contact with the second insulator and the other end has a tapered outer peripheral surface, and a center contact is provided at the center of the front end of the second insulator. At the same time, an annular elastic body is attached to the outer circumferential surface of the flange formed at the rear of the second insulator, and an annular elastic body is attached to press the inner circumferential surface of the connector main body. A third member having a tapered surface on its inner peripheral surface that slides into contact with the tapered surface of the body.
An insulator is fitted into the connector main body, and the thick-walled flange of a reinforcing sleeve consisting of a cylindrical portion and a thick-walled flange is brought into contact with the third insulator, and the outer periphery of the cylindrical portion of the reinforcing sleeve is Flexible spring bodies are arranged along the axial direction at predetermined intervals near the base of the face, and an inner clamp located on the outside of the cylindrical part of the reinforcing sleeve is cut into the center so as to narrow the inner clamp. An outer clamp that has a concavo-convex portion formed on its inner circumferential surface and slides into contact with the outer circumferential surface of the inner clamp through a tapered surface is loaded on the rear side of the connector body, and a part of the outer clamp protrudes from the connector body, A gasket is installed in the rear part of the outer clamp to press the outer conductor of the coaxial cable, and a gasket is installed in the auxiliary metal fitting connected to the rear part of the clamp to press the outer conductor of the coaxial cable. An FT type connector characterized by being equipped with a gasket that compresses the cover.