JPH09129322A - Waterproof coaxial connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide waterproof performance with a comparatively simple structure by slightly changing the form of a non-water-proof coaxial connector and adding an O ring and a water proof ring. SOLUTION: The outer skin 5 of a coaxial cable 1 and an external conductor 4 are properly cut out, a water-proof ring 10 made of synthetic rubber or the like is attached to the tip part of the outer skin and a contact pin 11 is attached to the tip of a core line 2 and inserted from the rear end of a connector main body 6 so as to be position in the specified spot of a insulating part 12. The cylindrical visor 9 of the connector main body 6 is inclined such that the depth part of the inner diameter of the visor 9 is narrowed, the waterproof ring 10 is pushed into a gap between the outer skin 5 and the visor 9 at the same time when the coaxial cable 1 is inserted and the infiltration of rainwater or the like into the exposed end part of the external conductor 4 is prevented. The filtration of rainwater through a gap between the connector main body 6 and a connecting nut 14 is prevented by an O ring 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof type coaxial connector, and more particularly to a waterproof type coaxial connector having a waterproof property by changing the shape of a non-waterproof type coaxial connector and adding a small number of parts.

[0002]

2. Description of the Related Art Non-waterproof coaxial connectors include, for example,
There is a structure as shown in FIG. This structure is the tip of the outer conductor (shield wire) of the coaxial cable 1.
Since 52 is vulnerable to rainwater intrusion, the shielded wire may corrode from this portion after long-term use.In addition, rainwater that has infiltrated through the gap 53 between the connector main body 51 and the connection nut 14 may contact pin 11, it may cause insulation failure. For this reason, a non-waterproof type coaxial connector is unsuitable for connection to a device installed outdoors such as a satellite broadcast receiving antenna. For example, a waterproof type coaxial connector as shown in the half sectional view of FIG. 6 is used. To be done. This coaxial connector has a structure in which the tip end portion of the coaxial cable 1 is attached to the rear end of the connector main body portion 61, and the outer case 62 that covers the coaxial cable 1 is attached to the connector main body portion 61 by screwing. O-rings 63 and 64 are provided in the gap between the portion 61 and the outer case 62 and in the gap between the outer case 62 and the coaxial cable 1, respectively, and rainwater penetrates into the exposed portion of the outer conductor of the coaxial cable 1 through these spaces. It has a structure to prevent. In addition, O
The ring 15 is for preventing rainwater from entering the contact pin 11 through the gap between the connection nut 14 and the pedestal (not shown). As described above, the conventional waterproof coaxial connector uses three O-rings, and also the outer shell 62 is used for waterproofing.
The number of parts is larger than that of the non-waterproof type coaxial connector, and the structure is complicated.

[0003]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention makes the shape of a non-waterproof type coaxial connector slightly improved and adds a minimum number of parts, so that it is almost the same as the non-waterproof type. To obtain a coaxial connector having a substantially structure and substantially waterproof performance.

[0004]

In order to solve the above-mentioned problems, the present invention has an opening at the tip for mounting an insulator having a contact pin attached at the center, and the contact at the center at the rear end of the opening. A coaxial cable is provided with a connector main body having a through hole for passing a core wire of a coaxial cable to be connected to a pin and having an outer conductor and an outer skin of the coaxial cable attached to the outer periphery so as to be connected to the outer conductor. A coaxial connector comprising a ring fitting for tightening a coaxial cable to be fixed to a main body, wherein the connector main body is a cylinder projecting rearward at a position surrounding an end of an outer conductor and an outer sheath of the coaxial cable to be mounted. Shaped coaxial eaves, comprising a waterproof ring formed of an elastic member for fitting between the outer cover of the coaxial cable and the cylindrical eaves. It is intended to provide the data.

[0005]

With the above construction, in the waterproof coaxial connector according to the present invention, a force is applied to the body portion of the non-waterproof coaxial connector so that the attached coaxial cable is pushed forward by tightening the ring fitting. By improving the structure and adding one O-ring and one waterproof ring, it is possible to obtain the waterproof performance substantially equivalent to that of the waterproof coaxial connector.

[0006]

Embodiments of the waterproof coaxial connector according to the present invention will now be described in detail with reference to the drawings. FIG. 1 is a half sectional view of a main part of an embodiment of a waterproof coaxial connector according to the present invention, and FIGS. 2, 3 and 4 are partial sectional views of other embodiments. In the figure, 1 is a coaxial cable, 2 is a center conductor (core wire) of the coaxial cable 1, 3 is an insulating portion of the core wire, 4
Is an outer conductor (shield wire) of the coaxial cable 1, and 5 is an outer sheath of the coaxial cable 1. 6 is a connector main body, 7 is a recess formed on the outer periphery of the connector main body 6, the outer diameter of which gradually decreases toward the front, 8 is the coaxial cable 1 of the connector main body 6
A ring fitting for fixing to the outer peripheral surface of the coaxial cable 1, a cylindrical eaves covering the ends of the outer conductor 4 and the outer skin 5 of the coaxial cable 1, 10, 21, 31 and 41, respectively, waterproof rings,
It is formed by using an elastic member, for example, a silicon-based or synthetic rubber-based member. 11 is a contact pin, 12 is an insulating part for holding the contact pin 11, 13 is an insulating holding part for fixing the insulating part 12 to the connector body 6, 14 is a connection nut part for attaching the connector to the female, and 15 is An O-ring for preventing rainwater from entering the pedestal and the contact pin 11 (not shown) through the gap between the connector body 6 and the connection nut 14. The insulating portion 3 and the insulating portion 11 are made of fluororesin or the like having high insulation resistance and excellent heat resistance and chemical resistance.

As shown in FIGS. 2 and 3, the outer sheath 5 and the outer conductor 4 at the tip of the coaxial cable 1 are appropriately cut according to the structure of the coaxial connector, and the insulating portion 3 is appropriately removed to expose the core wire 2. Then, the contact pin 11 is attached to the tip of the core wire 2 by crimping or soldering, and the waterproof rings 10, 21, 31 are attached to the tip portions of the outer cover 5 and the outer conductor 4.
Or insert 41. Then, the core wire 2 with the contact pin 11 and the insulating portion 3 are inserted into the center hole while the insulating portion 3 and the outer conductor 4 are separated at the edge portion 23 at the rear end of the connector main body portion 6, and as shown in FIG. Contact pin as shown
Insert the connector 11 until it reaches a predetermined position of the insulating portion 11 on the opening side of the connector body 6. Simultaneously with the insertion of the coaxial cable 1, the waterproof ring 10, 21, 31 or 41 is pushed sufficiently into the space between the outer skin 5 of the coaxial cable 1 and the cylindrical eaves 9 by using an appropriate tool, Waterproof ring 1
Completely fill the gap with 0, 21, 31 or 41. At this time, a lubricant having a sealing property, for example, silicone oil or silicone grease is applied to the outer peripheral surface of the waterproof ring 10, 2, 31 or 41 to facilitate the insertion of the waterproof ring into the cylindrical eaves 9 and at the same time to prevent rainwater. To increase the effect of blocking the invasion of. After that, the ring fitting 8 is tightened with a required tool to fix the coaxial cable 1 to the connector body 6.

By forming the recess 7 of the connector body 6 which is the mounting portion of the ring metal fitting 8 into a shape in which the diameter becomes smaller toward the front, the outer conductor 4 and the outer sheath 5 of the coaxial cable 1 are tightened by tightening the ring metal fitting 8. A force pushing forward is applied to the coaxial cable 1 to make it difficult to pull out the coaxial cable 1, and at the same time, the waterproof ring 10, 21, 31 or 41 is pushed into the gap between the eaves 9 and the waterproof effect is further enhanced.

2 and 3 show examples in which the shape of the waterproof ring 10 is improved to enhance the waterproof performance. FIG. 2 shows the waterproof ring 21.
Is attached to the coaxial cable 1 so that the end portion 22 is protruded from the outer skin 5 and the tips of the outer conductors 4, and the coaxial cable 1
The connector 22 is attached to the connector body 6 so that the tip 22 is brought into close contact with the bottom of the eaves 9 so that the tip of the outer conductor 4 (exposed) can be further protected against intrusion of rainwater. Fig. 3 shows the tip of the waterproof ring 31
32 is bent inward and the tip of the outer conductor 4 is covered with this bent portion to improve the water resistance performance. At the same time, the waterproof ring 31 is caught by the bent portion 32 at the tip of the outer conductor 4, etc. The waterproof ring 31 is prevented from being left without being put in the eaves 9 when it is mounted on the connector body 6.

FIG. 4 shows an example in which a ring-shaped groove 42 is formed on the outer peripheral surface of the waterproof ring 41. The applied lubricant is retained in the ring-shaped groove 42 and mounted on the cylindrical eave 9. The edge portion of the groove 42 is pushed by and the lubricant is pushed out of the groove 42, spreads on the outer peripheral surface of the waterproof ring 41, and the effect of preventing intrusion of rainwater is enhanced.

[0011]

As described above, according to the waterproof type coaxial connector of the present invention, the shape of the non-waterproof type coaxial connector is slightly changed, and the O-ring and the waterproof ring are attached to substantially improve the waterproof performance. This is a useful connector that can be used as a coaxial connector and has a simple structure that is almost the same as the non-waterproof type coaxial connector and does not increase the cost so much.

[Brief description of the drawings]

FIG. 1 is a half sectional view of a main part of an embodiment of a waterproof coaxial connector according to the present invention.

FIG. 2 is a partial cross-sectional view of another embodiment of the waterproof coaxial connector according to the present invention.

FIG. 3 is a partial cross-sectional view of another embodiment of the waterproof coaxial connector according to the present invention.

FIG. 4 is a partial cross-sectional view of another embodiment of the waterproof coaxial connector according to the present invention.

FIG. 5 is a half cross-sectional view of an essential part of an example of a non-waterproof coaxial connector.

FIG. 6 is a half sectional view of a main part of an example of a conventional waterproof coaxial connector.

[Explanation of symbols]

 1 coaxial cable 2 center conductor (core wire) 4 outer conductor (shield wire) 5 outer sheath 6 connector body 7 recess 8 ring metal fitting 9 cylindrical eaves 10, 21, 31, 41 waterproof ring 11 contact pin 12 contact pin insulation part 14 Connection nut 15 O-ring

Claims (9)

[Claims] 1. An opening for mounting an insulator having a contact pin attached to the center thereof is provided at a front end, and a through hole for passing a core wire of a coaxial cable connected to the contact pin is provided at a center of a rear end of the opening. A connector main body having an outer conductor and a skin of the coaxial cable attached to the outer periphery so as to be connected to the outer conductor, and a ring metal fitting for fastening the coaxial cable to fix the coaxial cable to the connector main body is provided. In the coaxial connector, a cylindrical eave projecting rearward is formed in the connector body at a position surrounding the outer conductor of the coaxial cable to be mounted and the end of the outer cover, and the outer cover of the coaxial cable and the cylindrical cover are formed. A waterproof coaxial connector comprising a waterproof ring formed of an elastic member for fitting between the eaves and the eaves. 2. The waterproof ring is attached to the outer conductor and the outer sheath through the coaxial cable so as to be aligned with the tip positions of the outer conductor and the coaxial cable, and is attached from the rear end of the connector main body to form the outer sheath and the cylindrical shape of the coaxial cable. The waterproof coaxial connector according to claim 1, wherein the waterproof coaxial connector is fitted between the eaves and the eaves. 3. The waterproof ring according to claim 2, wherein a lubricant having a sealing property is applied to the outer surface of the waterproof ring to lubricate between the waterproof ring and the cylindrical eaves and prevent rainwater from entering. Waterproof coaxial connector. 4. A ring-shaped groove is formed on the outer surface of the waterproof ring so that the applied lubricant stays in the groove and is pushed out from the groove when mounted and spreads on the outer surface of the waterproof ring.
The waterproof coaxial connector according to claim 3, wherein the waterproof ring and the cylindrical eaves are lubricated to prevent rainwater from entering. 5. The tip of the waterproof ring is attached so as to project forward from the tips of the outer conductor and the outer cover, and the tip of the waterproof ring comes into contact with the bottom surface of the cylindrical eave when mounted on the connector body. Claims 2 and 3 adapted to
Alternatively, the waterproof coaxial connector according to claim 4. 6. The method according to claim 1, wherein the tip portion of the waterproof ring is bent inward, and the bent portion covers the end portion of the outer conductor of the coaxial cable. Waterproof coaxial connector. 7. The cylindrical eaves are formed by inclining the inner peripheral surface of the coaxial cable so that the distance between the eaves and the outer jacket of the coaxial cable is gradually reduced,
The outer peripheral surface of the waterproof ring is formed so as to have an inclination corresponding to the inner peripheral surface of the eaves, claim 1, claim 2, claim 3, claim 4, claim 5 or claim 6. Waterproof coaxial connector. 8. The connector body is formed with a concave portion at a position corresponding to the mounting position of the ring fitting, and the outer conductor and the outer cover of the coaxial cable are set in the recessed portion when tightened by the ring fitting. The waterproof coaxial connector according to claim 2, claim 3, claim 4, claim 5, claim 6, or claim 7. 9. The waterproof according to claim 8, wherein the concave portion is formed such that the outer diameter thereof is gradually reduced toward the front side, and a pressing force in the front direction is applied to the coaxial cable by tightening with the ring fitting. Type coaxial connector.