JPH0917522A - Ft type connector - Google Patents

Abstract

PURPOSE: To provide an FT type connector having such structure that components are mutually connected without scattering by reducing the number of components as much as possible. CONSTITUTION: In an FT type connector, a shell 2 connecting to a fastening metal fixture is protruded, and insulating bodies 4a, 4b coming in contact with the outer circumferential surface of a central contact 3 are mounted in the front and rear of the shell 2. A lock nut 6 is screwed to screw parts 2a, 2d formed on the outer circumferential surface adjacent to a fastening part 2b of the protruded shell 2, and a connecting metal fixture 5 which is adjacent to the lock nut 6 and mounted to the protruded tip side outer circumferential surface of the shell 2 is engaged with the lock nut 6 with a holding metal fixture. An O-ring 9 is arranged on the edge surfaces of the screw parts 2a, 2d of the shell 2 which is positioned on the inner circumferential surface of the lock nut 6 and screws the lock nut 6, and the edge surface of the base part of connecting metal fixture, and another O-ring for connecting to an appliance is arranged on the tip side outer circumferential surface of the connecting metal fixture 5 to form a screw part.

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
SWR) 1.2 FT type connector designed to have a rating of 1.2 or less.

In a conventional FT type connector, a fastening metal fitting of the FT type connector is loosely fitted to an outer sheath of a coaxial cable which is preliminarily processed, and a shell which is screwed and connected to the fastening metal fitting is aforesaid. Separated from the metal fittings, screw the screw part formed on the outer peripheral surface of the tip of the shell into the connector (female screw) on the device side, and insert the center contact protruding from the tip of the shell into the device side for connection. Was there. Then, insert the tip of the inner conductor of the coaxial cable into the conductor receiving portion of the center contact and attach the outer conductor of the coaxial cable into the shell and tape.
When inserted between the core clamp and the clamp, and finally the clamp is moved and clamped to the screw formed on the outer peripheral surface of the shell, the tip of the inner conductor of the coaxial cable is located outside the conductor receiving portion of the center contact. The outer conductor of the coaxial cable, which is strongly crimped by a backup ring or the like provided at the end of the coaxial cable, is also strongly pressed between the sleeve and the taper clamp.

[0003]

Generally, when a coaxial cable is connected to a device through an FT type connector, the connecting work is usually performed at a high place outdoors. Therefore, after connecting the coaxial cable to the device, it is necessary to check the device, the coaxial cable, or the like for a trouble, or to check the presence or absence of a wire breakage during maintenance or inspection. In such a case, since the inner conductor and outer conductor of the coaxial cable are firmly fixed by the FT type connector, even if the tightening fitting is loosened, the coaxial cable is loosened.
It takes a lot of force to detach the bull from the FT type connector, and it is not easy, and it is impossible to give sufficient force because it is an unstable work when working in high places outdoors. . Further, even if the coaxial cable can be removed, the connector cannot generally be reused.

Further, from the connector side (female screw) on the equipment side to FT
Even when trying to loosen the shell to remove the shell of the mold connector, the tip of the coaxial cable is firmly fixed to the instrument in the shell, so that the coaxial cable is also rotated together. Therefore, it is practically impossible to rotate a long coaxial cable, and it is very difficult to remove the FT type connector from the device and perform maintenance and inspection work on the coaxial cable. The present invention has been made in view of the above points, and an object of the present invention is to maintain and inspect equipment such as coaxial cables and amplifiers after connecting coaxial cables to equipment via FT type connectors. The coaxial cable can be easily removed from the device without rotating a long coaxial cable in order to perform the work such as the inspection, and the cable can be easily inspected. Water is completely sealed in, the reliability of electrical signals is secured, and it is easy to attach to existing general-purpose devices such as amplifiers. The number of parts is reduced as much as possible and the parts do not come apart. An object of the present invention is to provide an FT-type connector having a structure connected to each other.

[0005]

In an FT type connector according to the present invention, a shell connected to a fastening member is made to project, and an insulator contacting with an outer peripheral surface of a center contact is mounted before and after an inner peripheral surface of the shell. A lock nut is screwed into a screw part formed on the outer peripheral surface adjacent to the protruding portion of the protruding shell, and the connecting metal fitting that is adjacent to the lock nut and is attached to the outer peripheral surface of the protruding end of the shell is held. An O-ring is provided on the screw portion end surface of the shell which is engaged with the lock nut by a metal fitting and is located on the inner peripheral surface of the lock nut, and the lock nut is screwed on, and an O-ring on the end surface of the connecting metal fitting, and the tip of the connecting metal fitting. A screw portion provided with another O-ring connected to the device side is provided on the outer peripheral surface of the portion side.

Further, in the FT type connector according to the present invention, a shell connected to the tightening fitting is projected, and an insulator which is in contact with the outer peripheral surface of the center contact is attached to the front and rear of the inner peripheral surface of the shell, and the protruding shell is attached. A lock nut that engages with a holding ring interposed is attached to the outer peripheral surface adjacent to the tightening portion of, and a screw portion is formed on the outer peripheral surface of the tip end portion of the lock nut, and a screw portion that is screwed with the screw portion is formed. The connecting fitting formed on the inner peripheral surface is attached to the protruding outer peripheral surface of the shell, and an O-ring is provided between the leading end surface of the lock nut and the screw terminal end surface of the connecting fitting. A screw portion provided with another O-ring connected to the device side is provided on the outer peripheral surface on the tip end side.

Further, the FT type connector according to the present invention is
A shell connected to the tightening metal is projected, and an insulator that contacts the outer peripheral surface of the center contact is attached to the front and rear of the inner peripheral surface of the shell and an annular projection is formed on the outer peripheral surface near the tightened portion of the protruding shell. , A lock nut that engages with one end surface of the annular projection is mounted on the outer peripheral surface of the shell, a screw portion is formed on the inner peripheral surface of the tip end portion of the lock nut, and a screw portion that engages with the screw portion is formed on the outer periphery. The connection fitting formed on the surface is attached to the outer peripheral surface of the shell on the protruding tip side, and an O-ring is provided between the other end surface of the annular projection and the screw portion side end surface of the connection fitting, and the tip of the connection fitting is further provided. A screw portion provided with another O-ring connected to the device side is provided on the outer peripheral surface of the portion side.

Furthermore, in the FT-type connector according to the present invention, a shell connected to the tightening fitting is projected, and an insulator contacting with the outer peripheral surface of the center contact is attached to the front and rear of the inner peripheral surface of the shell and the protruding. A screw nut of a left screw is formed on the outer peripheral surface adjacent to the tightening portion of the shell, and a lock nut having a screw portion that engages with the screw portion of the left screw is formed on the inner peripheral surface of the one end side. A threaded portion of a right screw is formed on the inner peripheral surface of the other end portion of the lock nut, and a connecting fitting having a threaded portion screwed with the threaded portion of the right screw is formed on the outer peripheral surface of the shell. It is mounted on the outer peripheral surface, an O-ring is provided between the end surface of the left screw of the shell on the screw portion side and the rear end surface of the connecting fitting, and both are provided between the outer peripheral surface on the tip end side of the shell and the inner peripheral surface of the connecting fitting. A retaining ring for engaging the It is provided with a threaded portion having a different O-ring to be connected to the device side part outer peripheral surface. Although description has been omitted in the present invention, as means for press-contacting or crimping the conductor receiving portion of the center contact, for example, a slidable taper-shaped insulator that press-contacts from the outer peripheral surface of the conductor receiving portion or The fact that a backup ring or the like is built in and that the outer conductor of the coaxial cable is firmly fixed by being inserted between the sleeve and the taper clamp has been taken. Is the same as.

[0009]

First, a case will be described in which an FT type connector is attached to the tip of a coaxial cable and the connector is connected to a device. By tightening the clamp, the inner conductor of the coaxial cable is firmly pressed against the conductor receiving part of the center contact housed in the shell via a slidable taper-shaped insulator or backup ring. The outer conductor of the coaxial cable is inserted between the sleeve and the taper clamp and firmly fixed. Next, the center contact protruding from the tip of the connection fitting is inserted into the connector seat of the device, and the screw portion of the connection fitting is screwed into the contact seat, and the O-ring is strongly pressed against the contact plug to be water-sealed. . Next, the connection fitting is engaged with the lock nut via the retaining ring, and when the lock nut is tightened, the screw portion of the lock nut and the screw portion of the shell are in a threaded relationship, and the shell approaches the connection fitting side. Then, the O-ring provided between the end surface of the screw portion of the shell and the end surface of the connection fitting base portion is strongly pressed, and the invasion of water from the outside is also blocked here. Therefore, by interposing the O-rings at the above-mentioned respective locations, it is possible to block the water that enters the inside from the outside from any location of the FT-type connector.

Next, the FT mounted on the tip of the coaxial cable
Described below is the case of removing the mold connector from the device. Turn the lock nut to loosen the screw. Further, when the screw portion of the connecting fitting in engagement with the lock nut and the holding ring is loosened, the connecting fitting is disengaged from the plug seat of the device. Since the connection fitting is in a free state with respect to the outer peripheral surface of the shell, the coaxial cable does not rotate in conjunction with these even if the connection fitting is turned. Therefore, the center contact protruding from the tip of the connection fitting removed from the connector seat of the device can be inspected by a signal detector such as a tester.

The second aspect of the present invention will be described with respect to a case where an FT type connector is attached to the tip of a coaxial cable and the connector is connected to a device. By tightening the clamp, the inner conductor of the coaxial cable is firmly pressed against the conductor receiving part of the center contact housed in the shell via a slidable taper-shaped insulator or backup ring. The outer conductor of the coaxial cable is inserted between the sleeve and the taper clamp and firmly fixed. Next, the center contact protruding from the tip of the connection fitting is inserted into the connector seat of the device, and the screw portion of the connection fitting is screwed into the contact seat, and the O-ring is strongly pressed against the contact plug to be water-sealed. . Next, the connection fitting is screwed with the lock nut, and when the lock nut is tightened, the screw portion of the lock nut and the screw portion of the connection fitting are in a threaded relationship, and the lock nut approaches the connection fitting side and locks. The O-ring provided between the end surface of the screw portion of the nut and the end surface of the screw portion of the connection fitting is in a strongly pressed state, and water intrusion from the outside is also blocked here. In addition,
Since the lock nut and the shell are engaged with each other via the retaining ring, the shell also advances as the lock nut advances. Therefore, by interposing the O-rings at the above-mentioned respective locations, it is possible to block the water that enters the inside from the outside from any location of the FT-type connector.

Next, the FT attached to the tip of the coaxial cable
Described below is the case of removing the mold connector from the device. Turn the lock nut to loosen the screw that is screwed into the fitting. At this time, although the lock nut and the shell are engaged with each other through the holding ring, they are in a mutually free state, and the shell retracts in the axial direction together with the lock nut without rotating. Next, by turning the connection fitting, the connection fitting is in a free state with respect to the outer peripheral surface of the shell, so that the connection fitting is turned in the opposite direction so that the screw portion thereof comes off from the connector seat of the device. Even if the lock nut and the connecting fitting are turned, they remain free from the shell, and the coaxial cable does not rotate in conjunction with them. Therefore, the center contact protruding from the tip of the connection fitting removed from the connector seat of the device can be inspected by a signal detector such as a tester.

The third invention will be described with respect to a case where an FT type connector is attached to the tip of a coaxial cable and the connector is connected to a device. By tightening the clamp, the inner conductor of the coaxial cable is firmly pressed against the conductor receiving part of the center contact housed in the shell via a slidable taper-shaped insulator or backup ring. The outer conductor of the coaxial cable is inserted between the sleeve and the taper clamp and firmly fixed. Next, the center contact protruding from the tip of the connection fitting is inserted into the connector seat of the device, and the screw portion of the connection fitting is screwed into the contact seat, and the O-ring is strongly pressed against the contact plug to be water-sealed. . Next, the connection fitting is screwed with the lock nut, and when the lock nut is turned, the screw part of the lock nut is strongly tightened to the threaded portion of the connection fitting, and is formed on the outer peripheral surface near the tightened portion of the shell. A lock nut that engages with one end surface of the annular projection advances the shell along the axial direction, and strongly presses the O-ring provided between the other end surface of the annular projection and the screw portion side end surface of the connection fitting, Water sealed connected. Therefore,
By interposing the O-rings at each of the above-mentioned locations, it is possible to block the water entering from the outside to the inside from any location of the FT-type connector.

Next, an FT mounted on the tip of the coaxial cable
Described below is the case of removing the mold connector from the device. Turn the lock nut to loosen the screw that is screwed into the fitting. At this time, since the lock nut is free with respect to the shell, the shell does not rotate. Next, by turning the connection fitting, the connection fitting is in a free state with respect to the outer peripheral surface of the shell, so that the connection fitting is turned in the opposite direction so that the screw portion thereof comes off from the connector seat of the device. Even if the lock nut and the connecting fitting are turned, they remain free from the shell, and the coaxial cable does not rotate in conjunction with them. Therefore, the center contact protruding from the tip of the connection fitting removed from the connector seat of the device can be inspected by a signal detector such as a tester.

Finally, with respect to the fourth invention, a case will be described in which an FT type connector is attached to the tip of a coaxial cable and the connector is connected to a device. By tightening the clamp, the inner conductor of the coaxial cable is firmly pressed against the conductor receiving part of the center contact housed in the shell via a slidable taper-shaped insulator or backup ring. The outer conductor of the coaxial cable is a sleeve and taper.
Inserted between the clamps and firmly fixed. Next, the center contact protruding from the tip of the connection fitting is inserted into the connector seat of the device, and the screw portion of the connection fitting is screwed into the contact seat, and the O-ring is strongly pressed against the contact plug to be water-sealed. . Next, the connection fitting is screwed with the lock nut, and by turning the lock nut, the lock nut is tightly tightened to the connection fitting, and at the same time, the shell in the relationship of the lock nut and the left screw does not rotate but does not rotate in the axial direction. The O-ring is strongly pressed between the end portion surface of the left screw of the shell on the screw portion side and the rear end surface of the connection fitting, and the O-ring is water-sealed. Therefore, by interposing the O-rings at the above-mentioned respective locations, it is possible to block the water that enters the inside from the outside from any location of the FT-type connector.

Next, the FT mounted on the tip of the coaxial cable
Described below is the case of removing the mold connector from the device. Turn the lock nut to loosen the screw that is screwed into the fitting. At this time, since the lock nut has a left-handed screw relationship with the shell and rotates freely, the shell does not rotate. Next, when the connecting fitting is turned, the connecting fitting is engaged with the outer peripheral surface of the shell by the retaining ring, but is in a free state. Comes off from the connector of the device. Even if the lock nut and the connecting fitting are turned, they remain free from the shell, and the coaxial cable does not rotate in conjunction with them. Therefore, the center contact protruding from the tip of the connection fitting removed from the connector seat of the device should be attached to the tester.
Can be inspected with a signal detector such as.

[0017]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a semi-mounted sectional view showing an embodiment of the first invention, FIG. 2 is a semi-mounted sectional view showing another embodiment of an insulator to be loaded in the connection fitting of the first invention, and FIG. 1 is a semi-mounted sectional view showing a state in which an FT type connector equipped with the coaxial cable of the invention 1 is attached to a device, FIG. 4 is a semi-mounted sectional view showing an embodiment of the second invention, and FIG. 5 is a semi-mounted sectional view showing another embodiment of an insulator to be loaded in the connection fitting of the invention of FIG. 6, FIG. 6 is a semi-mounted sectional view showing one embodiment of the third invention, and FIG. 7 is AA of FIG. Line cross section,
FIG. 8 is a semi-mounted sectional view showing another embodiment of an insulator to be loaded in the connection fitting of the third invention, FIG. 9 is a semi-mounted sectional view showing one embodiment of the fourth invention, and FIG. 11 is a half-mounting sectional view of the FT-type connector of FIG. 11, FIG. 11 is a right side view of FIG. 10, and FIG.

An embodiment of the first invention will be described with reference to FIGS. 1 to 3. Reference numeral 1 is a fastening metal fitting, and 2 is a shell having a screw portion 2a which is screwed into the screw portion 1a of the fastening metal fitting 1. A tightening portion 2b is formed adjacent to the screw portion 2a of the shell 2, and a screw portion 2d is formed in a recess 2c adjacent to the tightening portion 2b.
Is formed, a stepped projecting tubular portion 2e is formed at the end of the screw portion 2d, and the tip of the tubular portion 2e is formed into a tubular portion 2f having a smaller diameter. Insulators 4a, 4b contacting with the outer peripheral surface of the center contact 3 having a pin portion 3a and a conductor receiving portion 3b in front of and behind the inner peripheral surface of the shell 2.
Attach. In FIG. 1, the insulator 4a is caulked, whereas in FIG. 2, the insulator 4a is press-fitted not on the inner peripheral surface of the shell 2 but on the inner peripheral surface of the connecting fitting 5 described later.

Reference numeral 6 denotes a lock nut in which a screw portion 6a to be screwed with the screw portion 2d of the shell 2 is formed on one end side (rear end portion) of the inner peripheral surface. Grooves 6b and 5a are formed at corresponding positions on the other end side (front end portion) of the inner peripheral surface of the lock nut 6 and the rear end portion of the outer peripheral surface of the connection fitting 5, respectively.
A retaining ring 7 made of a material such as phosphor bronze for engaging the two is provided in the 5a. Further, the connecting fittings 5 are provided on the outer peripheral surfaces of the protruding cylindrical portion 2e of the shell 2 and the thin cylindrical portion 2f.
Attach. The rear end surface of the connection fitting 5 and the screw portion 2 of the shell 2
An O-ring 8 is provided in the space between the end surface of d. Also,
A screw portion 5b is provided on the outer peripheral surface of the tip of the connection fitting 5, and an O-ring 9 is provided near the base portion of the screw portion 5b. In FIG. 3, 10 is a backup ring, 11 is a sleeve, and 12
Is a clamp, 13 is a taper clamp, 14 is a gasket, A is a coaxial cable, B is an inner conductor, C is an insulator, D
Is an outer conductor, and E is a jacket.

Next, the first invention will be described with reference to FIG. 3 in the case where an FT type connector is attached to the tip of the coaxial cable A and the connector is connected to a device. The inner conductor B of the coaxial cable A, which has been processed in advance, is slidable on the conductor receiving portion 3b of the center contact 3 housed in the shell 2 by tightening the tightening metal fitting 1 with a tightening tool or the like. The outer conductor D of the coaxial cable A, which is firmly pressure-contacted via the ring-shaped insulator or the backup ring 10 or the like.
Is inserted between the sleeve 11 and the taper clamp 13 and firmly fixed. Next, the center contact 3 protruding from the tip of the connecting fitting 5 is inserted into the connector seat attached to the equipment, and the screw portion 5b of the connecting fitting 5 is screwed into the connector seat, so that the O-ring 9 is attached to the connector seat. It is strongly pressed and is connected to the water seal. Next, the connection fitting 5 is engaged with the lock nut 6 via the holding ring 7, and when the lock nut 6 is tightened, the screw portion 6a of the lock nut 6 and the screw portion 2d of the shell 2 are in a threaded relationship. , The shell 2 approaches the side of the connection fitting 5, and the O-ring 8 provided between the end surface of the screw 2d of the shell 2 and the end surface of the base of the connection fitting 5 is strongly pressed. Invasion is blocked. Therefore, by interposing the O-rings at the above-mentioned respective locations, it is possible to block the water that enters the inside from the outside from any location of the FT-type connector.

Next, F mounted on the tip of the coaxial cable A
A case where the T-type connector is removed from the device will be described.
Turn the lock nut 6 to loosen the screw. Further, when the screw portion 5b of the connecting fitting 5 which is in an engaging relationship with the lock nut 6 and the holding ring 7 is loosened from the stopper seat, the connecting fitting 5 is detached from the stopper seat of the device. Since the connecting fitting 5 is mounted in a free state on the protruding cylindrical portion 2e and the small-diameter cylindrical portion 2f which are the outer peripheral surface of the shell 2, even if the connecting fitting 5 is rotated, the coaxial cable is turned. Bull A does not rotate in conjunction with these. Therefore, the pin portion 3 of the center contact 3 protruding from the tip of the connection fitting 5 removed from the connector seat of the device
a can be inspected by a signal detector such as a tester.

FIG. 4 is a semi-mounted sectional view showing an embodiment of the second invention, and FIG. 5 is a semi-mounted sectional view showing another embodiment of an insulator to be loaded in the connection fitting of the second invention. FIG.
The basic construction is the same as that of the first embodiment of the invention, and the point is that the connecting fitting 5 and the lock nut 6 are free from the shell 2.
It is a structure that becomes the state of In the second embodiment of the invention, the retaining ring 7 is so arranged that the shell 2 and the lock nut 6 are engaged with each other.
Is provided, and the screw portion 6c is formed on the stepped outer peripheral surface which is lowered by one step on the tip end side of the lock nut 6. On the inner peripheral surface of the rear portion of the connecting fitting 5, a screw portion 5c that is screwed with the screw portion 6c is formed, and the front end surface of the lock nut 6 and the screw portion 5 of the connecting fitting 5 are formed.
The difference from the embodiment of the first invention is that an O-ring is provided between it and the c-termination surface. Fig. 5 shows the insulator 4 inside the fitting 5.
The case where a is pressed in and loaded is shown. The second invention has an advantage that the total length can be slightly shortened as compared with the embodiment of the first invention.

Next, the case where the FT type connector attached to the tip of the coaxial cable in the embodiment of the second invention is removed from the equipment will be described. The lock nut 6 is turned to loosen the screw of the screw portion 6c which is screwed with the screw portion 5c of the connection fitting 5. At this time, although the lock nut 6 and the shell 2 are engaged with each other via the holding ring 7, they are in a mutually free state and the shell 2 does not rotate and the lock nut 6 does not rotate.
Along with it, it retreats in the axial direction. Next, by turning the connection fitting 5, the connection fitting 5 is in a free state with respect to the protruding cylindrical portion 2e and the small-diameter cylindrical portion 2f, which are the outer peripheral surface of the shell 2, so that the connection is performed. By rotating the metal fitting 5 in the opposite direction, the screw portion 5b is removed from the connector seat of the device. Even if the lock nut 6 and the connection fitting 5 are turned, they are in a free state with respect to the shell 2, and the coaxial cable A does not turn in conjunction with them. Therefore, the pin portion 3a of the center contact 3 protruding from the tip of the connection fitting 5 removed from the connector seat of the device can be inspected by a signal detector such as a tester.

FIG. 6 is a semi-mounted sectional view showing an embodiment of the third invention, FIG. 7 is a sectional view taken along the line AA of FIG. 5, and FIG. 8 is an insulator to be loaded in the connection fitting of the third invention. FIG. 7 is a semi-mounting sectional view showing another embodiment of the present invention. The basic configuration is the same as that of the first embodiment of the invention, and the point is that the connecting fitting 5 and the lock nut 6 are the shell 2
In contrast, the structure is in a free state. In the embodiment of the third invention, an annular protrusion 2g is formed on the outer peripheral surface in the vicinity of the tightening portion 2b of the shell 2 protruding forward, and the annular protrusion 2g is formed.
A substantially L-shaped lock nut 6 that engages with one end surface (left side in the drawing) of the shell 2 is mounted on the outer peripheral surface of the shell 2, and a screw portion 6d is formed on the inner peripheral surface of the tip portion of the lock nut 6. A fitting 5 having a screw portion 5d which is screwed with the screw portion 6d is formed on the outer peripheral surface of the shell 2 is attached to the protruding cylindrical portion 2e and the small diameter cylindrical portion 2f, which are the outer peripheral surface on the tip end side of the shell 2. To do. The point different from the first embodiment is that an O-ring 8 is provided between the other end surface of the annular projection 2g (on the right side in the drawing) and the end surface of the connection fitting 5 on the screw portion 5d side. FIG. 8 shows a case where the insulator 4a is press-fitted and loaded into the connection fitting 5.

Next, the case where the FT type connector attached to the tip of the coaxial cable in the third embodiment of the invention is removed from the equipment will be described. The lock nut 6 is rotated to loosen the screw of the screw portion 6d which is screwed with the screw portion 5d of the connection fitting 5. At this time, since the lock nut 6 is free from the shell 2, the shell 2 does not rotate. Next, since the connection fitting 5 is in a free state with respect to the outer peripheral surface of the shell 2 by turning the connection fitting 5, the connection fitting 5 is turned in the opposite direction so that the screw portion 5b of the connection fitting 5 contacts the equipment. Remove from the seat. Even if the lock nut 6 and the connection fitting 5 are turned, they are in a free state with respect to the shell 2, and the coaxial cable A does not turn in conjunction with them. Therefore, the pin portion 3a of the center contact 3 protruding from the tip of the connection fitting 5 removed from the connector seat of the device can be inspected by a signal detector such as a tester.

FIG. 9 is a semi-mounted sectional view showing an embodiment of the fourth invention. The basic structure is the same as that of the first embodiment of the invention, and the essential point is a structure in which the connecting fitting 5 and the lock nut 6 are in a free state with respect to the shell 2. In the embodiment of the fourth aspect of the invention, the screw portion 2h of the left screw is formed on the outer peripheral surface adjacent to the tightening portion 2b of the shell 2 protruding forward, and the screw portion 6e is screwed with the screw portion 2h of the left screw. Is formed on the outer peripheral surface of the shell 2, and the lock nut 6 is formed on the inner peripheral surface on one end side (the left side in the drawing) on the inner peripheral surface on the other end side (the right side in the drawing). The connection fitting 5 is formed on the outer peripheral surface of the shell 2 in which the screw portion 6f of the right screw is formed and the screw portion 5e to be screwed with the screw portion 6f of the right screw is formed on the outer peripheral surface. An O-ring 8 is provided between the end face of the left screw of the shell 2 on the screw portion 2h side and the rear end face of the connecting fitting 5. The difference from the embodiment of the first invention is that a retaining ring 7 is provided between the outer peripheral surface of the shell 2 on the tip end side and the inner peripheral surface of the connecting fitting to engage them. The fourth invention has a smaller number of parts than the first to third inventions and does not become too large in outer shape, and is a preferable structure in practical use.

Next, the case where the FT type connector attached to the tip of the coaxial cable in the embodiment of the fourth invention is removed from the equipment will be described. The screw part 6f of the right screw that is screwed into the screw part 5e of the connection fitting 5 by turning the lock nut 6
Loosen the screws. At this time, the lock nut 6 is the shell 2
On the other hand, since it has a left-handed screw relationship and rotates freely, the shell 2 does not rotate. Next, by rotating the connecting fitting 5, the connecting fitting 5 is attached to the outer peripheral surface of the shell 2 by a retaining ring 7
Although it is engaged with, it is in a free state, so
By turning the connection fitting 5 in the opposite direction, the screw portion 5b is removed from the connector seat of the device. Even if the lock nut 6 and the connection fitting 5 are turned, they are in a free state with respect to the shell 2, and the coaxial cable A does not turn in conjunction with them. Therefore, the pin portion 3a of the center contact 3 protruding from the tip of the connection fitting removed from the connector seat of the device can be inspected by a signal detector such as a tester.

[0028]

Since the present invention has the above-mentioned structure, after connecting the coaxial cable to the device through the FT type connector,
Even when maintaining and inspecting equipment such as coaxial cables and amplifiers at high places, you can rotate the lock nuts and connecting fittings of the FT connector without turning the long coaxial cables to the shell. Because it is in the free state, the coaxial cable integrated with the shell does not rotate at all,
The cable can be easily removed from the device. Therefore, the coaxial cable can be easily inspected. In addition, since the FT type connector has an O-ring provided at the key points,
The F according to the present invention, which completely prevents the intrusion of water from the outside, has a high reliability of electric signals, and can be applied to existing general-purpose devices such as amplifiers.
The T-connector is easy to install, and the number of parts is as small as possible. In addition, the connecting metal fittings and lock nuts are engaged with the shell by screws, retaining rings or annular protrusions, so the parts are separated from each other. It is possible to provide an FT-type connector which is a structure which is connected to each other without being formed, and which is extremely convenient for work in high places.

[Brief description of the drawings]

FIG. 1 is a semi-mounting sectional view showing an embodiment of a first invention.

FIG. 2 is a semi-mounting sectional view showing another embodiment of an insulator to be loaded in the connection fitting of the first invention.

FIG. 3 is a half-mounting sectional view showing a state in which an FT-type connector equipped with the coaxial cable of the first invention is attached to a device.

FIG. 4 is a semi-mounting sectional view showing an embodiment of the second invention.

FIG. 5 is a semi-mounting sectional view showing another embodiment of an insulator to be loaded into the connection fitting of the second invention.

FIG. 6 is a semi-mounting sectional view showing an embodiment of a third invention.

FIG. 7 is a sectional view taken along line AA of FIG. 6;

FIG. 8 is a semi-mounting sectional view showing another embodiment of an insulator to be loaded into the connection fitting of the third invention.

FIG. 9 is a semi-mounting sectional view showing an embodiment of the fourth invention.

FIG. 10 is a half-mounting sectional view of a conventional FT-type connector.

FIG. 11 is a right side view of FIG.

FIG. 12 is a semi-mounting sectional view in which a coaxial cable is end-processed.

[Explanation of symbols]

1 Tightening fitting 2 Shell 2a Screw part 2b Tightening part 2d Screw part 2e Protruding tubular part 2f Small diameter tubular part 2g Annular projection 3 Center contact 3a Pin part 3b Conductor receiving part 4a, 4b Insulator 5 Connection fitting 5b Screw part 5c Screw part 5c Screw part 5d Screw part 5e Screw part 6 Lock nut 6a Screw part 6c Screw part 6d Screw part 6e Screw part 6f Right screw part 7 Holding ring 8 O-ring 9 O-ring 10 Backup ring 11 Slave 13 Tape clamp A Coaxial cable B Inner conductor C Insulator D Outer conductor E Jacket

Claims (4)

[Claims] 1. A shell for connecting to a fastening member is projected,
Insulators that contact the outer peripheral surface of the center contact are attached to the front and rear of the inner peripheral surface of the shell, and a lock nut is screwed into the screw portion formed on the outer peripheral surface adjacent to the tightening portion of the protruding shell, and the lock nut is attached to the lock nut. A shell of the shell, which is adjacent to and engages the connecting metal fittings mounted on the outer peripheral surface of the protruding end of the shell with the retaining metal fittings, is located on the inner peripheral surface of the lock nut, and is screwed into the lock nut. An FT type in which an O-ring is provided on the end face of the screw part and the end face of the connecting fitting, and a screw part provided with another O-ring for connecting to the device side is provided on the outer peripheral surface of the connecting fitting on the tip end side. connector. 2. A shell connected to the tightening fitting is projected,
An insulator that contacts the outer peripheral surface of the center contact is attached to the front and rear of the inner peripheral surface of the shell, and a lock nut that engages with a retaining ring interposed is attached to the outer peripheral surface adjacent to the tightening portion of the protruding shell. A screw fitting is formed on the outer peripheral surface of the tip portion of the lock nut, and a connecting metal fitting having a screw portion that engages with the screw portion is formed on the inner peripheral surface is attached to the outer peripheral surface of the shell on the projecting tip end portion of the lock nut. An O-ring is provided between the front end surface of the connector and the screw terminal end surface of the connecting fitting, and a screw portion having another O-ring for connecting to the device side is provided on the outer peripheral surface of the connecting fitting on the tip end side. Characteristic FT type connector. 3. A shell connected to the tightening fitting is projected,
Insulators that contact the outer peripheral surface of the center contact are attached to the front and rear of the inner peripheral surface of the shell, and an annular projection is formed on the outer peripheral surface near the tightening portion of the protruding shell, and engages with one end surface of the annular projection. A lock nut is attached to the outer peripheral surface of the shell, a screw portion is formed on the inner peripheral surface of the tip end portion of the lock nut, and a connecting fitting having a screw portion that engages with the screw portion is formed on the outer peripheral surface of the shell. Attached to the outer peripheral surface on the tip side,
An O-ring is provided between the other end surface of the annular protrusion and the end surface of the connection fitting on the screw section side, and a screw section having another O-ring connected to the device side is provided on the outer peripheral surface of the connection fitting on the tip end side. An FT type connector characterized in that 4. A shell connected to the tightening fitting is projected,
An insulator that contacts the outer peripheral surface of the center contact is attached to the front and rear of the inner peripheral surface of the shell, and a screw portion of the left screw is formed on the outer peripheral surface adjacent to the tightening portion of the protruding shell, and the screw portion of the left screw is formed. A lock nut having a screw part that is screwed with the inner peripheral surface of one end is formed on the outer peripheral surface of the shell, and a screw part of a right screw is formed on the inner peripheral surface of the other end of the lock nut. Attach the connection fitting having the outer peripheral surface of the screw portion to be screwed with the screw portion of the right screw to the outer peripheral surface of the shell, and between the end surface of the left screw of the shell on the screw portion side and the rear end surface of the connection fitting. An O-ring is provided, and a holding ring is provided between the outer peripheral surface on the tip end side of the shell and the inner peripheral surface of the connection fitting to engage the two. FT type connector characterized in that a screw part having an O-ring is provided. Data.