JPH0629062A - Ft type connector - Google Patents

Abstract

PURPOSE:To allow a connector for coaxial cable to be re-used through certain connection and easy drawing-off of the coaxial cable by putting the flange of a reinforcing sleeve in tight attachment with a clamp, holding the outer conductor of the cable between the cylindrical part of the sleeve and the surface unevenness of a tapered clamp, and squeezing uniformly. CONSTITUTION:Flange 8b of a reinforcing sleeve 8 in a connector body 1 is put in tight attachment with a clamp 9 caulked fast to the body 1. The outer conductor of a coaxial cable is held between the cylindrical part of the sleeve 8 and the surface unevenness 10c in a tapered clamp 10, and uniform squeezing force toward the axis is generated by splitting-in of the tapered clamp 10. The ring-shaped notch 12a in a second clamp 12 fitted in a metal fixture 3 and a recess 3a are fitted with a retainer ring 13 which also serves for lubrication. At a notch 12b in this second clamp 12 a washer 14 for lubrication is contacted with a gasket 15 for sheath, and the sheath of the coaxial cable is pressed resiliently by this gasket 15. Thereby the connection and grounding of the coaxial cable are ensured and also drawing-off is facilitated, which enables re-use of the connector.

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.

[0002]

2. Description of the Related Art The inventor of the present invention firstly proposed a first insulator fitted to a front end portion of a connector body and a second insulator abutting against the first insulator.
A split collar with one end abutting the second insulator and a taper surface on the outer peripheral surface of the other end, outside the conductor receiving portion of the center contact that holds the pin portion that partially protrudes to the outside with the insulator. A tubular insulator is provided, an annular elastic body for elastically pressing the pin portion of the center contact is attached to the center of the front end of the second insulator, and the collar body outer peripheral surface formed on the rear portion of the second insulator has the connector body An annular elastic body that elastically presses the peripheral surface is attached, and a third insulator having a taper surface on the inner peripheral surface that is in sliding contact with the taper surface of the tubular insulator with a split flange is fitted in the connector body. And the flange of a reinforcing sleeve made up of a tubular portion and a flange is brought into contact with the third insulator, and along the axial direction at a predetermined interval near the outer peripheral surface of the tubular portion of the reinforcing sleeve. A bent spring body is provided.

Further, an inner clamp located outside the tubular portion of the reinforcing sleeve is formed in a slit so as to be constricted in the central portion, and an uneven portion is formed on the inner peripheral surface of the inner clamp, so that the inner clamp and the outer peripheral surface of the inner clamp are formed. -The outer clamp that slides through the pad surface is loaded on the rear side of the connector body, and a part of the outer clamp protrudes from the connector body and is located inside the tightening fitting that connects to the connector body, and is coaxial with the rear portion of the outer clamp. An FT-type connector was developed in which a gasket for elastically pressing the outer conductor of the cable was installed, and a gasket for elastically pressing the outer jacket of the coaxial cable was provided in an auxiliary metal fitting connected to the rear of the tightening metal fitting (Japanese Patent Application No. No. 3-124617).

[0004]

This is because when a worker cuts the outer cover long at the time of processing the end of the coaxial cable, or when the gasket in the tightening fitting does not press the outer cover when tightening. Even if the outer cover is damaged or the outer cover is damaged for some reason, the ingress of water such as water or humidity can be completely sealed from both the center contact side and the coaxial cable side, and the inside of the connector body Coaxial cable
Since the outer conductor of the cable and the reinforcing sleeve are surely contacted with each other through the bent spring body, there is an advantage that a highly reliable FT type connector can be obtained without radio wave leakage, but it is incorporated in the connector. In addition to increasing the number of parts and increasing the cost as a whole, the structure for ensuring the electrical connection between the outer conductor of the coaxial cable and the tubular portion of the reinforcing sleeve must be complicated. Didn't get

When the outer clamp is mounted on the rear side of the connector body, the rear portion of the connector body is crimped to prevent the outer clamp from coming off. Therefore, once the coaxial cable is attached to the connector, , The outer conductor of the coaxial cable cannot be pulled out from the connector because the outer conductor is in a state of biting into the inner clamp,
The problem was that the connector could not be reused. Furthermore, when the coaxial cable is attached to the connector, the gasket attached to the outer clamp is crushed when the connector is pushed in while rotating, and the vertical inner wall of the tightening fitting contacts the rear end surface of the outer clamp. As a result, the coaxial cable is rotated together, and the coaxial cable is twisted.

The present invention has been made in view of the above points, and it is an object of the present invention to ensure electrical connection in a coaxial cable connector while reducing the number of parts to be incorporated in the connector. The outer conductor of the coaxial cable can be uniformly narrowed and held by a taper clamp, and when the coaxial cable is attached to the connector, the coaxial cable may be twisted. The FT-type connector that can be safely and securely mounted, and that even after the coaxial cable is mounted on the connector, the coaxial cable can be easily pulled out from the connector and the connector can be reused. To do.

[0007]

In the FT type connector according to the present invention, the base side of the pin portion is mounted in the connector body so that a part of the pin portion of the center contact projects outward from the connector body. A cylindrical insulator that holds a single insulator and narrows the conductor receiving portion of the center contact is slidably loaded in the connector body, and a part of the cylindrical insulator protrudes from the connector body to the outside. A reinforcing sleeve composed of a flange formed on the base side is loaded into the connector body so that the flange comes into contact with the stepped portion in the connector body, and the flange is fitted to the sliding insulator. , A clamp, one end of which abuts on the flange and the other end of which is crimped by an end of the connector body, is provided in the connector body, and the clamp is slidably contacted with the clamp via mutual taper portions to engage with the clamp. Together with one Has a taper clamp projecting outside from the connector body and located in the tightening metal fitting connected to the connector body. The taper clamp is formed with one portion along the axial direction as a whole and is formed with the tubular portion. Partial indentations are formed along the axial direction at the opposing positions, and the outer conductor of the coaxial cable is crimped by the tubular portion of the reinforcing sleeve and the uneven portion formed on the inner peripheral surface of the taper clamp. The connector located inside the tightening bracket by protruding from the connector body to the outside.
A gasket for outer conductor that elastically presses the outer conductor of the coaxial cable is attached to the end of the pad clamp, and further, one end of the second clamp loaded in the tightening bracket contacts the end face of the taper clamp and also holds for lubrication. A ring is attached, one end of the second clamp is brought into contact with the outer conductor gasket, a lubricating washer is attached to the other end of the second clamp, and the lubricating washer is brought into contact with the coaxial cable. The outer casing gasket that presses the outer casing is attached inside the tightening metal fitting.

[0008]

Before connecting the coaxial cable to the connector, the fastening metal fitting is inserted into the cable either before or after the terminal treatment of the cable. Insert the end-treated inner conductor of the coaxial cable tip into the conductor receiving portion of the center contact mounted on the connector body. When the inner conductor of the coaxial cable is inserted into the conductor receiving portion of the center contact, the tip end of the outer conductor of the coaxial cable fits on the outer peripheral surface of the tubular portion of the reinforcing sleeve. Then, when the tightening metal fitting is moved and screwed onto the outer peripheral surface of the connector main body to be connected, the clamp is slidably contacted and engaged with the clamp crimped at the rear portion of the connector main body through the taper portion. The taper clamp that is present moves to the right, and the sliding insulator that is in contact with the taper clamp also moves to the right, and the taper portion formed inside the sliding insulator causes the conductor receiving portion of the center contact to move. The inner conductor of the coaxial cable is crimped by the concavity and convexity formed on the inner peripheral surface of the conductor receiving portion.

On the other hand, the outer conductor of the coaxial cable is crimped between the uneven portion formed on the inner peripheral surface of the taper clamp in contact with the sliding insulator and the tubular portion of the reinforcing sleeve. . In this crimping, the taper clamp is uniformly narrowed toward the tubular portion of the reinforcing sleeve, so that the crimping is performed uniformly. An outer conductor gasket attached to the rear portion of the taper clamp is pressed against one end of the second clamp to elastically press and seal the outer conductor of the coaxial cable. At this time, the lubricating / holding ring attached to one end of the second clamp is in contact with the end face of the taper clamp. Further, the outer casing gasket pressed against the other end of the second clamp elastically seals the outer casing of the coaxial cable.

When the tightening metal fitting is further screwed, the stepped wall surface inside the tightening metal fitting, the outer gasket and the rear end surface of the second clamp have a washer for lubrication therebetween. Even if the screw is rotated and screwed, it is blocked by the intervening lubricating washer, and this rotational force is not transmitted to the second clamp, and the second clamp simply advances without rotating. Alternatively, even though the outer gasket may provide some torque to the second clamp through the washer for lubrication, the second clamp and taper
Since it is in contact with the end surface of the pad clamp via the retaining ring for lubrication, the rotational force transmitted to the second clamp is not transmitted to the taper clamp. Thus, the double lubrication member, that is, the lubricating washer and the retaining ring for lubrication prevent the coaxial cable from being twisted when the coaxial cable is connected to the connector.

After the coaxial cable is attached to the connector, the coaxial cable can be removed and the connector can be reused by unscrewing the fastening fitting from the connector body and removing the fastening fitting from the connector body. , A part of the taper clamp is completely exposed from the connector main body, and when the taper clamp is moved to the left side through the taper part, the taper clamp is formed by the restoring force of the taper clamp. -The concavo-convex portion formed on the inner peripheral surface of the pack clamp is separated from the outer conductor, so that the coaxial cable can be easily pulled out from the connector body.

[0012]

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 a screw for screwing an O-ring 2 for sealing to a base portion of a screw portion 1b on a side to be screwed with a connector (not shown) of a device, and a tightening fitting 3 described later. An O-ring 4 for sealing the metal fitting 3 and the main body 1 is provided at the base of the portion 1a. A columnar insulator 6 having an insertion hole 6c for the center contact 5 is loaded on the tip end side in the connector body 1. The insulator 6 is a ring-shaped collar body 6 in which only the tip end side is in contact with the inner wall of the connector body 1.
a and a body portion 6b (both body portion 6b may have various other shapes) notched on both sides, which is a watertight structure with a simple structure, and is intended to reduce material and cost. . A part of the pin portion 5a of the center contact 5 protrudes from the connector body 1 to the outside of the device (not shown) connection side, and the conductor receiving portion 5b is formed so as to be narrowed.
Further, a taper portion 5c is formed on the outer peripheral surface of the end portion of the conductor receiving portion 5b, and an uneven portion 5d such as a screw is formed on the inner peripheral surface of the conductor receiving portion 5b.

Reference numeral 7 is a sliding insulator slidably mounted in the connector body 1, and has a conductor through hole 7a through which the internal conductor B of the coaxial cable A penetrates at the axis of the sliding insulator 7. The conductor receiving portion 5b is formed on the inner peripheral surface of one end of the conductor through hole 7a.
Has a taper portion 7b that comes into contact with the taper portion 5c on the outer peripheral surface of the end of the connector, and the outer peripheral surface of the sliding insulator 7 is finished to have an outer diameter of a size in sliding contact with the inner peripheral wall of the connector body 1. A part of the outer peripheral surface of the dynamic insulator 7 (upper and lower two places in this example) forms a protruding piece 7c along the axial direction, and a circular groove 7d between the protruding piece 7c and the shaft portion.
The base portion of the reinforcement sleeve 8 and the reinforcement sleeve described later.
The flange 8b forming the bush 8 is fitted.

The reinforcing sleeve 8 is composed of a tubular portion 8a, a part of which projects outward from the connector body 1, and a flange 8b formed on the base side of the tubular portion 8a. The reinforcing sleeve 8 has a flange 8b at the boundary between the step portion 1c (the inner peripheral surface 1d loaded with the sliding insulator 7 and the inner peripheral wall surface 1e having a diameter larger than the inner peripheral surface 1d) in the connector body 1. It is loaded into the connector body 1 such that it abuts against the vertical wall surface) and fits into the circular groove 7d, and the outer peripheral surface of the flange 8b comes into contact with the large-diameter inner peripheral wall surface 1e. Reference numeral 9 denotes a clamp whose one end is in contact with the flange 8b and the other end is caulked at the end of the connector body 1, and the clamp 9 is fixed inside the large-diameter inner peripheral wall surface 1e of the connector body 1. There is. Further, the clamp 9 is formed with a taper portion 9a on one inner peripheral surface thereof, which is in sliding contact with a taper portion 10a of a taper clamp 10 which will be described later. -The engaging projection 1 of the pack clamp 10
An engagement step 9b for engaging 0b is formed.

A part of the taper clamp 10 projects from the connector main body 1 to the outside, and is located in the fastening metal fitting 3 which is connected to the connector main body 1. The taper clamp 10 has an engagement protrusion 10b that engages with an engagement step 9b of the clamp 9 at the tip of the outer peripheral portion located inside the connector body 1, and a clamp at the outer peripheral portion located inside the connector body 1. A taper portion 10a is formed in sliding contact with the taper portion 9a. Further, the reinforcing sleeve of the inner peripheral surface of the taper clamp 10 is
An uneven portion 10c for crimping the outer conductor D of the cable A is formed at a position corresponding to the tubular portion 8a of the bush 8. In addition,
An outer conductor gasket 11 that elastically presses the outer conductor D of the coaxial cable A is attached to the end of the taper clamp 10 that is located outside the connector body 1 and is located inside the tightening fitting 3. The outer conductor gasket 11 is
It is formed so as to project from the end of the pac lamp 10. Further, the taper clamp 10 is formed so as to have a single slit formed along the axial direction and has a plurality of positions (five in this example) corresponding to the tubular portion 8a of the reinforcing sleeve 8 at predetermined intervals. In addition, a partial cut is formed along the axial direction so that the whole can be uniformly narrowed toward the axial center.

Reference numeral 12 denotes a second clamp loaded in the fastening metal fitting 3. The second clamp 12 has an annular notch 12a formed on the outer peripheral surface of one end of the second clamp 12 and a fastening metal fitting corresponding to the annular notch 12a. A lubricating / holding ring 13 is loaded in the recess 3 a in the interior 3. The lubricating / holding ring 13 is made of a lubricating material such as resin such as polyacetal, and is provided with a deformable collar 13a or a protruding piece having a restoring force. Therefore, when the second clamp 12 is loaded into the tightening metal fitting 3, the collar 13a of the lubricating / holding ring 13 is pushed and bent into the inner peripheral wall of the tightening metal fitting 3, and the tightening metal fitting 3 is held.
The original shape is restored by the inner concave portion 3a, and thereafter, the second clamp 12 is held in the tightening fitting 3. Also, the second
One end of the clamp 12 is in contact with the outer conductor gasket 11, and the cutout portion 1 at the other end of the second clamp 12 is provided.
A lubricating washer 14 made of a material having lubricity is attached to 2b. 15 has a washer 14 for lubrication at one end
The outer casing gasket 15 mounted in the tightening metal fitting 3 so as to come into contact with the outer casing gasket 15 elastically presses the outer casing E of the coaxial cable A by the outer casing gasket 15.

Next, the usage of the FT type connector showing one embodiment of the present invention will be described. Before connecting the coaxial cable A to the connector, the fastening metal fitting 3 is inserted into the cable either before or after the end treatment of the coaxial cable A. The inner conductor B at the end of the coaxial cable A that has been subjected to terminal processing is attached to the connector body 1
It is inserted into the conductor receiving portion 5b of the center contact 5 attached to the. When the inner conductor B of the coaxial cable A is inserted into the conductor receiving portion 5b of the center contact 5, the tip of the outer conductor D of the coaxial cable A is placed on the outer peripheral surface of the tubular portion 8a of the reinforcing sleeve 8. Mating. When the tightening metal fitting 3 is moved and screwed into the screw portion 1a on the outer peripheral surface of the connector body 1, the taper clamp 10 is connected to the taper portion of the clamp 9 which is caulked at the rear portion of the connector body 1. 9a, taper portion 10
The taper clamp 10 which is slidably contacted via a and is engaged with the engaging stepped portion 9b of the clamp 9 moves to the right. The sliding insulator 7 in contact with the taper clamp 10 also moves to the right, and a taper portion 7b formed inside the sliding insulator 7,
The conductor receiving portion 5b of the center contact 5 is narrowed by the taper portion 5c which is in sliding contact with the taper portion 7b, and the conductor receiving portion 5 is formed.
The coaxial cable A is formed by the uneven portion 5d formed on the inner peripheral surface of b.
The inner conductor B is crimped.

On the other hand, the tape in contact with the sliding insulator 7
The outer conductor D of the coaxial cable A between the uneven portion 10c formed on the inner peripheral surface of the pad clamp 10 and the tubular portion 8a of the reinforcing sleeve 8 is tapered by sliding the taper portions 9a and 10a. The outer clamp D itself of the coaxial cable A is constricted in the axial direction uniformly by the whole cut-in at one place and the partial cut-outs at a plurality of places, so that the outer conductor D of the coaxial cable A is the cylindrical portion 8a.
And the concave and convex portion 10c. In addition, the outer conductor gasket 11 mounted on the rear portion of the taper clamp 10 is the second
The outer conductor D of the coaxial cable A is pressed and sealed at one end of the clamp 12 to seal it. Further, the second clamp 1
The outer casing gasket 15 pressed at the other end of 2 repels and seals the outer casing E of the coaxial cable A.

When the tightening metal fitting 3 is further screwed onto the connector body 1, the stepped wall surface 3b in the tightening metal fitting 3, the gasket 15 for the outer jacket, and the end face of the second clamp 12 have a lubricating washer 14 therebetween. Since it is interposed, the lubricating washer 14 is interposed even if the tightening fitting 3 is screwed into rotation.
Therefore, the rotational force is not transmitted to the second clamp 12, and the second clamp 12 simply advances without rotating. Alternatively, the outer gasket 15
May apply some torque to the second clamp 12 through the washer 14 for lubrication,
Since the second clamp 12 and the end surface of the taper clamp 10 are in contact with each other via the lubricating / holding ring 13, the rotational force transmitted to the second clamp 12 is not transmitted to the taper clamp 10. In this way, the dual lubrication member, that is, the washer 14 for lubrication and the retaining ring 13 for lubrication
Due to the interposition, when the coaxial cable A is connected to the connector 3, the coaxial cable A does not twist.

After the coaxial cable A is attached to the connector, the coaxial cable A can be detached and the connector can be reused by unscrewing the fastening metal fitting 3 from the connector body 1 and attaching the fastening metal fitting 3. When removed from the connector body 1, part of the taper clamp 10 is completely exposed from the connector body 1,
When the taper clamp 10 is moved to the left side via the taper portion 10a, the unevenness portion 10c formed on the inner peripheral surface of the taper clamp 10 becomes an external conductor due to the restoring force of the taper clamp 10 which is formed in a split manner. Since it is separated from D, the coaxial cable A can be easily removed from the connector body 1.

[0021]

Since the FT-type connector according to the present invention has the above-mentioned structure, the number of parts to be incorporated into the connector is reduced, and the number of assembling steps is reduced accordingly, and the cost can be reduced. In addition, the clamp clamped inside the connector body and the flange of the reinforcing sleeve are in close contact with each other without any gap, so that they are securely grounded and the electrical connection within the connector of the coaxial cable is ensured. Becomes
Furthermore, the outer conductor of the coaxial cable is sandwiched between the tubular portion of the reinforcing sleeve and the uneven portion in the taper clamp, and the taper clamp is evenly constricted toward the center of the shaft due to the insertion of the taper clamp, resulting in a strong structure. The outer conductor can be held in the. Further, when the coaxial cable is attached to the connector, the second clamp and the gasket for the outer casing, which are loaded in the tightening metal fitting, are in contact with each other via the washer for lubrication, and the second clamp and the taper clamp. The contact with the end face via the lubricating / holding ring, in combination with the double lubrication member, prevents torque from being applied to the loading member in the connector when the tightening fitting is rotated, and the coaxial cable. Trouble such as twisting of the bull is eliminated, and it can be mounted securely and securely.

Furthermore, even after the coaxial cable is attached to the connector, if the fastening metal fitting is removed from the connector body, the coaxial cable can be removed by pulling out the taper clamp protruding from the connector body to the outside. It is possible to obtain an FT-type connector which has advantages such that it can be easily pulled out from the connector body and the connector can be reused.

[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.

FIG. 4 is a perspective view of an insulator.

5 (a) is a sectional view of a sliding insulator, FIG. 5 (b).
Is a left side view thereof.

6 (a) is a sectional view of the taper clamp, FIG.
(B) is a right side view.

[Explanation of symbols]

1 Connector Main Body 1c Step 3 Clamping Metal 3a Recess 5 Center Contact 5a Pin 5b Conductor Receiving 6 Insulator 7 Sliding Insulator 7b Taper 8 Reinforced Sleeve 8a Tube 8b Flange 9 Clamp 9a Tee Pa part 9b Engaging step part 10 Taper clamp 10a Taper part 10c Concavo-convex part 11 External conductor gasket 12 Second clamp 13 Lubricating and holding ring 14 Lubricating washer 15 Outer gasket A A Coaxial cable B Inside Conductor D Outer conductor E Jacket

Claims (1)

[Claims] 1. The center contact is held by a single insulator mounted in the connector body so that part of the pin portion of the center contact protrudes outward from the connector body, and the conductor of the center contact is received. Reinforcing sleeve comprising a tubular portion slidably mounted in the connector body so as to narrow the portion thereof, a part of which projects outward from the connector body, and a flange formed on the base side of the tubular portion. Is loaded into the connector body such that the flange abuts on the stepped portion in the connector body, and the flange is fitted to the sliding insulator, one end abuts the flange, and the other end Is provided in the connector body by crimping at the end portion of the connector body, and the clamp is slidably contacted with the clamp through mutual taper portions to engage with the clamp and a part of the clamp protrudes from the connector body to the outside. Connector body A taper clamp located in the tightening metal fitting that is connected to the taper clamp is provided, and the taper clamp is formed so that one portion is entirely formed along the axial direction and a portion facing the tubular portion is formed along the axial direction. The outer conductor of the coaxial cable is crimped by the cylindrical portion of the reinforcing sleeve and the uneven portion formed on the inner peripheral surface of the taper clamp, and protrudes from the connector body to the outside. An outer conductor gasket that elastically presses the outer conductor of the coaxial cable is attached to the end of the taper clamp located in the fitting, and the taper clamp is attached to one end of the second clamp loaded in the tightening fitting. A retaining ring for lubrication that is in contact with the end face is attached, one end of the second clamp is brought into contact with the gasket for outer conductor, and a washer for lubrication is attached to the other end of the second clamp. Abutting against the coaxial cable FT-type connector, characterized in that attached to the fastening fittings envelope gasket to repression the envelope Le.