JPH07105255B2 - FT type connector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is based on JIS-C-5410 (general rules for high-frequency coaxial connectors), and has a nominal impedance of 75 .OMEGA.
V (effective value), frequency 1000 MHz, voltage standing wave ratio (V
This is an FT-type connector designed to have a rating of SWR) 1.2 or less, and is particularly applicable to the case where the outer conductor of the coaxial cable is hard such as an aluminum pipe.

As a conventional FT type connector, an interrupting taper clamp forms a notch over the entire axial length and is loosely fitted into the inner peripheral surface of the connector body near the rear end thereof.
The remaining portion projects outside and is located inside the tightening metal fitting, and contacts the claw body of the backup ring, and the reinforcing tubular ring that is loosely fitted into the inner peripheral surface near the rear end of the connector body is used as the above split. Some of the taper clamps are attached to the outer peripheral surface (see Japanese Patent Publication No. 2-6198).

In this case, the inner conductor of the coaxial cable is prevented from coming off, the connector can be reused, or when the fastening metal fitting and the connector main body are screwed together, a load is applied to both screwing portions. Although it has the advantage that it can be tightened firmly without using it, if the worker cuts the jacket for a long time when processing the end of the coaxial cable, or when the gasket in the tightening fitting is tightened. When the outer cover is not suppressed, or when the outer cover is damaged for some reason, water, moisture and the like enter through the wound, and the measures against the leakage of radio waves in the connector body are not sufficient.

The present invention has been made in view of the above points, and an object of the present invention is to cut the outer cover of a worker when the coaxial cable is treated with a terminal or in a tightening metal fitting. Even if the gasket does not press the outer cover when tightening it, or if the outer cover is damaged for some reason, it completely seals in the ingress of water such as water and humidity, and the radio wave inside the connector body An object of the present invention is to provide a highly reliable FT type connector that prevents leakage.

In the FT type connector according to the present invention, the first insulator fitted to the front end of the connector body and the second insulator abutting the first insulator have a pin portion partially protruding to the outside. A tubular insulator with a split collar having one end abutting against the second insulator and the other end having a taper surface is provided outside the conductor receiving portion of the held center contact, and the second insulator is provided. An annular elastic body that elastically presses the pin portion of the center contact is attached to the center of the front end of the connector, and an annular elastic body that elastically presses the inner peripheral surface of the connector body is attached to the outer peripheral surface of the collar formed on the rear portion of the second insulator. Reinforcing a third insulator having an inner peripheral surface having a taper surface that is in sliding contact with the taper surface of the tubular insulator with a split flange and having a tubular portion and a thick flange. The thick flange of the sleeve is brought into contact with the third insulator, and the tubular portion of the reinforcing sleeve is Bending spring bodies are arranged along the axial direction at a predetermined distance near the base of the peripheral surface, and an inner clamp located outside the tubular portion of the reinforcing sleeve is formed with a slit so as to narrow in the center portion. An uneven clamp is formed on the inner peripheral surface of the clamp, and the outer clamp, which makes sliding contact with the outer peripheral surface of the inner clamp via the taper surface, is loaded on the rear side of the connector body, and part of the outer clamp protrudes from the connector body. It is located in the tightening metal fitting that is connected to the main body, a gasket for elastically pressing the outer conductor of the coaxial cable is attached to the rear part of the outer clamp, and the coaxial cable is installed in the auxiliary metal fitting that is connected to the rear part of the tightening metal fitting. A gasket for elastically pressing the outer cover is provided.

[0006]

Function: Before connecting the coaxial cable to the connector, after inserting the tightening metal fitting with the auxiliary metal fitting to the cable either before or after the terminal treatment of the cable, the coaxial cable after the terminal treatment Insert the inner conductor at the tip into the conductor receiving part of the center contact mounted on the connector body. At this time, the pin portion of the center contact located in the connector body is elastically sealed by the annular elastic body attached to the second insulator, and is attached to the outer peripheral surface of the flange portion of the second insulator. The annular elastic body elastically 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 portion of the center contact, the tip of the outer conductor of the coaxial cable fits on the outer peripheral surface of the cylindrical portion of the reinforcing sleeve, The bending spring disposed near the base of the outer peripheral surface of the tubular portion is pressed against the inner wall surface of the outer conductor and stretched in the axial direction to elastically press the inner wall surface of the outer conductor for electrical connection with the reinforcing sleeve. Will be certain. Then, when the tightening metal fitting to which the auxiliary metal fitting is connected is moved and screwed onto the outer peripheral surface of the rear portion of the connector main body to connect, the rear end surface of the outer clamp protruding from the connector main body contacts the stepped wall surface inside the tightening metal fitting. The inner clamp is pushed through the pad surface.

When the inner clamp is pushed, the inner clamp is formed in a slit, so that the inner clamp is narrowed toward the center, and the concavo-convex portion formed on the inner peripheral surface of the inner clamp is the outer conductor of the coaxial cable. It is fixed so as to bite into the outer peripheral surface. Also, when the inner clamp is pushed, the third insulator is pushed through the thick flange of the reinforcing sleeve and press-contacts the tubular insulator with the split flange through the taper surface. The inner peripheral surface of the attached cylindrical insulator is pressed against the outer peripheral surface of the conductor receiving portion of the center contact, and the conductor receiving portion firmly fixes the inner conductor. Furthermore, when tightening the connector body, the outer jacket of the coaxial cable is elastically pressed by the gasket inside the auxiliary metal fitting, and the outer conductor of the coaxial cable is elastically sealed by the gasket attached to the outer clamp. It

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a side view thereof. Reference numeral 1 denotes a connector body, which is an O-ring 2 for sealing the base portion of a screw portion 1b on a side to be screwed with a connector K of a device, and a base portion of a screw portion 1a which is screwed with a tightening fitting 11 described later. And an O-ring 12 for sealing the metal fitting 11 and the main body 1, respectively. A columnar first insulator 3 having an insertion hole 3a for the center contact 7 is loaded at the tip of the connector body 1. A part of the pin portion 7a of the center contact 7 projects from the connector main body 1, and the conductor receiving portion 7b is formed with a recess so that it can be narrowed.
An uneven portion 7c such as a screw is formed on the inner peripheral surface thereof.

Reference numeral 4 denotes a columnar second insulator which abuts the first insulator 3, which is fitted in the connector body 1 and has an insertion hole 4a for the center contact 7 at the center thereof. An annular elastic body 5 such as an O-ring that elastically presses the pin portion 7a of the center contact 7 is attached to the center of the front end of the second insulator 4. Further, at the rear portion of the second insulator 4, a flange portion 4b is integrally formed with the insulator 4 so as to be fitted to the inner peripheral surface of the intermediate diameter formed on the connector body 1, and the outer peripheral surface of the flange portion 4b is formed. An annular elastic body 6 such as an O-ring for elastically pressing the inner peripheral surface of the intermediate diameter of the connector body 1 is mounted. Reference numeral 8 is a tubular insulator provided on the outside of the conductor receiving portion 7b of the center contact 7 and having a flange 8a. The insulator 8 has a flange 8a at one end contacting the second insulator 4 and a taper surface 8b formed on the outer peripheral surface at the other end. Reference numeral 9 is 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 inner conductor B of the coaxial cable A at the center. The third insulator 9 has a taper surface 9b, which is in sliding contact with the taper surface 8b of the tubular insulator 8 with the split flange, formed on the inner peripheral surface.

Reference numeral 10 denotes a reinforcing sleeve made up of a tubular portion 10a and a thick flange 10b, which is mounted in the connector body 1. The end portion side of the tubular portion 10a partially projects from the connector body 1, and the outer peripheral surface of the thick flange 10b is in sliding contact with the large-diameter inner peripheral surface formed in the connector 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 a groove is formed around the groove along the axial direction. A downward bent dogleg-shaped bending spring body 18 is arranged. Reference numeral 13 is an inner clamp located outside the tubular portion 10a of the reinforcing sleeve 10. The flange portion 13a formed at the front end portion of the inner clamp 13 is in contact with the thick flange 10b. The inner clamp 13 is formed so as to be constricted in the central portion, and an inner peripheral surface of the inner clamp 13 is provided with a concavo-convex portion 13b such as a screw. To form.

14 is located outside the inner clamp 13,
It is an outer clamp having a taper surface 14a which is in sliding contact with the taper surface 13c on the inside. The outer peripheral surface of the front part of the outer clamp 14 is in sliding contact with the large-diameter inner peripheral surface formed in the connector body 1,
The rear side is protruded from the connector main body 1 and is caulked at the terminal end of the connector main body 1 so as not to come out. A gasket 15 for elastically pressing the outer conductor D of the coaxial cable A is mounted on the rear side of the outer clamp 14 protruding from the connector body 1. When the connector body 1 and the tightening metal member 11 are connected, the gasket 15 is pressed by the vertical wall formed in the tightening metal member 11 to repress the outer conductor D. Reference numeral 16 is an auxiliary metal fitting that is connected to the rear portion of the fastening metal fitting 11. Inside the auxiliary metal fitting 16, a gasket 17 that elastically presses the jacket E of the coaxial cable A is provided.

Next, a method of using the FT type connector showing an embodiment of the present invention will be described. Before connecting the coaxial cable A to the connector, insert the fastening metal fitting 11 with the auxiliary metal fitting 16 connected to the cable A either before or after the terminal treatment of the cable (see FIG. 3 (a)). (See FIG. 3B). After that, the inner conductor B at the tip of the coaxial cable A which is end-treated
Is inserted into the conductor receiving portion 7b of the center contact 7 mounted on the connector body 1. At this time, the pin portion 7a of the center contact 7 located inside the connector body 1 is elastically sealed by the annular elastic body 5 mounted on the second insulator 4, and sealed.
Further, the inner peripheral surface of the connector body 1 is elastically pressed by the annular elastic body 6 mounted on the outer peripheral surface of the flange portion 4b of the second insulator 4, and is transmitted through the outer peripheral surfaces of the insulators 3 and 4 and the pin portion 7a. Water entering the interior is completely stopped 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 has a cylindrical portion 1 of the reinforcing sleeve 10.
0a, which is fitted on the outer peripheral surface of the tubular sleeve 10a of the reinforcing sleeve 10.
The bending spring body 18 arranged near the outer peripheral surface base is an outer conductor D.
The inner wall surface of the outer conductor D is elastically pressed in a state of being pushed by the inner wall surface of the outer conductor D and extended in the axial direction, so that the electrical connection with the reinforcing sleeve 10 becomes reliable and the electric characteristics are stabilized. Then, when the tightening metal fitting 11 to which the auxiliary metal fitting 16 is connected is moved and screwed onto the rear outer peripheral surface of the connector main body 1 for connection, the rear end surface of the outer clamp 14 protruding from the connector main body 1 is inside the tightening metal fitting 11. The inner clamp 1 through the taper surfaces 14a and 13c while hitting the stepwise vertical wall surface.
3 is pressed. At the same time when the inner clamp 13 is pushed, the inner clamp 13 is formed in a split manner, so that the inner clamp 13 is narrowed toward the center, and the concavo-convex portion 13b formed on the inner peripheral surface of the inner clamp 13 is provided outside the coaxial cable A. It is fixed so as to bite into the outer peripheral surface of the conductor D.

When the inner clamp 13 is pushed,
The third insulator 9 is pushed through the thick flange 10b of the reinforcing sleeve 10, and the tubular insulator 8 with the flange a is inserted into the press through the taper surfaces 9b and 8b. The inner peripheral surface of the insulator 8 is pressed against the outer peripheral surface of the conductor receiving portion 7b of the center contact 7, so that the inner conductor B is firmly fixed by the uneven portion formed inside the conductor receiving portion 7b.
Further, when the connector body 1 and the tightening fitting 11 are tightened, the outer jacket E of the coaxial cable A is attached to the auxiliary fitting 16 by the gasket 17, and the outer conductor D of the coaxial cable A is attached to the outer clamp 14. By the gaskets 15 described above, it is possible to completely seal any water that may be elastically pressed and may enter from the coaxial cable A side (see FIG. 3C).

[0015]

Since the FT-type connector according to the present invention has the above-mentioned structure, when the worker cuts the outer cover too long at the time of processing the end of the coaxial cable, or when the gasket in the tightening fitting is tightened. Even if the jacket is not repressed at all times, or if the jacket is damaged for some reason, the penetration of water such as water or moisture is completely sealed from both the center contact side and the coaxial cable side. it can. Moreover, the outer conductor and the reinforcing sleeve of the coaxial cable in the connector body are
Since it comes into reliable contact with the bush through the bent spring body, there is no leakage of radio waves and a highly reliable FT type connector can be obtained.

[Brief description of drawings]

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

FIG. 2 is a side view of FIG.

FIG. 3 (a) is a sectional view of a coaxial cable for terminal treatment,
3 (b) and 3 (c) are cross-sectional views illustrating a method of attaching the FT type connector.

[Explanation of Codes] 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 Reinforcing sleeve 11 Tightening fitting 13 Inside Clamp 14 Outer clamp 15 Gasket 16 Auxiliary metal fitting 17 Gasket 18 Bending spring body

Claims (1)

[Claims] 1. A first member fitted to a front end of a connector body.
One end is in contact with the second insulator and the other end is outside the conductor receiving portion of the center contact that holds a pin portion that partially protrudes to the outside by the insulator and the second insulator that contacts the first insulator. Provide a tubular insulator with a split collar having a taper surface on the outer peripheral surface of the part,
An annular elastic body that elastically 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 elastically presses the inner peripheral surface of the connector body to the outer peripheral surface of the collar portion formed at the rear portion of the second insulator. A third insulator having an inner peripheral surface having a taper surface which is slidably contacted with the taper surface of the tubular insulator with a split collar, and is fitted into the connector body, and the tubular portion and the thick wall The thick-walled flange of the reinforcing sleeve formed of the flange is the third
Bending spring bodies are arranged along the axial direction at a predetermined distance near the base of the outer peripheral surface of the tubular portion of the reinforcing sleeve, and are positioned outside the tubular portion of the reinforcing sleeve. The inner clamp is formed with a slit so as to be constricted in the central part, and an uneven portion is formed on the inner peripheral surface of the inner clamp.
The outer clamp that slides in contact via the pad surface is loaded on the rear side of the connector body, and part of the outer clamp protrudes from the connector body and is located inside the tightening fitting that connects to the connector body.
A gasket for elastically pressing the outer conductor of the coaxial cable is attached to the rear part of the outer clamp, and a gasket for elastically pressing the outer sheath of the coaxial cable is provided in an auxiliary metal fitting connected to the rear part of the fastening metal fitting. FT type connector.