JP2639339B2 - Coaxial cable connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coaxial cable connector for connecting a coaxial cable of a communication device such as a CATV (cable television).

[0002]

2. Description of the Related Art Conventionally, as a connector for a coaxial cable, there is a connector configured to connect a male connector body by screwing it into a female connector body. This type of coaxial cable connector will be described with reference to FIG.

FIG. 2 is a sectional view of a conventional coaxial cable connector. The coaxial cable connector 1 shown in FIG.
It is composed of a socket 2 as a female connector main body, and a plug 3 as a male connector main body detachably connected to the socket 2 by screws. The socket 2 includes an outer conductor 4 formed in a substantially cylindrical shape from a conductive material, a dielectric insulator 5 provided so as to fill the inside of the outer conductor 4, and a radially center portion of the dielectric insulator 5. And a center conductor 6 buried so as to penetrate the dielectric insulator 5.

The outer conductor 4 is integrally formed with a cylindrical portion 4a protruding in the axial direction from a portion buried in the dielectric insulator at one end side in the axial direction. On the inner surface of the cylindrical portion 4a, a female screw 4b into which a plug 3 described later is screwed is formed. The end of the outer conductor 4 on the side opposite to the cylindrical portion 4a is configured to be connected to a communication device (not shown) or the like.

The center conductor 6 is arranged on the same axis as the outer conductor 4, a portion located in the dielectric insulator 5 is formed in a substantially cylindrical shape, and one end is formed in an axial direction from an end face of the dielectric insulator 5. Is projected along. The substantially cylindrical portion constitutes a female contact connected to a central conductor of a plug 3 described later, and the portion protruding from the dielectric insulator 5 constitutes a male contact connected to the communication device or the like. ing.

The plug 3 includes a substantially cylindrical outer conductor 8 electrically connected to an outer conductor (not shown) of the coaxial cable 7, and a dielectric insulator provided to fill the outer conductor 8. 9, and a central conductor 10 buried in a radially central portion of the dielectric insulator 9 so as to penetrate the same. The outer conductor 8 of the plug 3 has a distal end 8a formed to have a smaller diameter than the base on the coaxial cable 7 side.

The center conductor 10 of the plug 3 is arranged on the same axis as the outer conductor 8, and protrudes axially from the distal end surface of the small diameter portion 8a. The projecting portion forms a male contact that fits into the female contact of the center conductor 6 of the socket 2.

In the conventional connector for a coaxial cable configured as described above, the plug 3 is inserted into the cylindrical portion 4a of the socket 2.
The plug 3 can be connected to the socket 2 by screwing the small diameter portion 8a of the plug 3 into the cylindrical portion 4a. That is, the outer conductor 8 of the plug 3 is electrically connected to the outer conductor 4 of the socket 2 via the screw portion, and the center conductor 10 of the plug 3 is
Is electrically connected to the center conductor 6 by fitting. At this time, the center conductors 6 and 10 are fitted together while the center conductor 10 of the plug 3 rotates while the socket 2
Is carried out by fitting into the center conductor 6.

The plug 3 is removed from the socket 2 by rotating the socket 2 so that the screw portion is loosened.

[0010]

However, if the plug 3 is screwed into the socket 2 to connect the two, the coaxial cable 7 integral with the plug 3 is used when connecting and disconnecting the two. Since the coaxial cable 7 must be turned at the same time, there is a problem that the coaxial cable 7 is twisted. In particular, if the coaxial cable 7 remains twisted after the connection, the plug 13 may be loosened by the coaxial cable 7.

In addition, since the center conductor 10 of the plug 3 is inserted into and removed from the center conductor 6 of the socket 2 while rotating, if an excessive rotational force is applied to the center conductors 6 and 10, they are easily broken. In particular, the center conductor 10 of the plug 3 constituting the male contact is easily cut off. In addition, the center conductors 6 and 10 were easily worn, and the life as a coaxial cable connector was short.

Further, when the coaxial cable connector 1 is disposed at a location where water is splashed, such as outdoors, there may be a case where conduction failure occurs. This was attributable to the intrusion of water from the screw portion into the inside. That is, the outer conductor and the center conductor are short-circuited by the intruded water, or the contact portions between the center conductors 6 and 10 are corroded to cause poor contact.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is an object of the present invention to prevent a rotational force from being applied to a coaxial cable and a center conductor and to prevent water from entering the side of the center conductor. Aim.

[0014]

According to a first aspect of the present invention, there is provided a coaxial cable connector in which an outer conductor is filled with a dielectric.
Female connector with a center conductor at the center of the dielectric
Connector body and male connector body.
Detach the center conductor and the outer conductor of the
In a freely configured coaxial cable connector,
A cylindrical portion protrudes from the outer conductor of the female connector body, and
The inner diameter of the base of the cylinder is made larger than that of the tip.
The dielectric is placed in the area where
The male connector body is extended in a cylindrical shape so that
Of the external conductor of the female connector body
The cylindrical portion is inserted into the cylindrical portion, is electrically connected, and has a female connector at the end.
Facing the inside of the cylindrical part of the dielectric of the reactor body
A small diameter portion and a large diameter portion are provided at the distal end of the cylindrical portion, which are provided with a tapered hole at an end portion of the cylindrical portion so as to hold the engaging ball so as to be able to protrude and retract from the inner surface of the cylindrical portion. A cylindrical slider having a portion formed therein is movably fitted, and a concave portion in which the ball is engaged is formed in an outer peripheral portion of an outer conductor of the male connector main body.

A coaxial cable connector according to a second aspect of the present invention is the coaxial cable connector according to the first aspect, wherein an outer conductor of the female connector main body and an outer conductor of the male connector main body fitted into the outer conductor are provided. An O-ring is provided between the conductor and the outer conductor to be pressed against the peripheral surfaces of both outer conductors.

[0016]

According to the first aspect, attachment and detachment are performed by moving the male connector main body in the axial direction with respect to the female connector main body.

According to the second aspect, even if water intrudes from the connection between the outer conductors, the water is prevented from entering the center conductor by the O-ring.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIG. FIG. 1 is a sectional view of a coaxial cable connector according to the present invention. In the figure, reference numeral 11 denotes a coaxial cable connector according to the present invention. The coaxial cable connector 11 includes a socket 12 as a female connector main body,
And a plug 13 as a male connector main body. Note that, since these socket 12 and plug 13 have the same structure as the conventional one described in FIG. 2 except for the external conductor, in this embodiment, the constituent members other than the external conductor are the conventional ones. The same reference numerals are given and the detailed description is omitted.

Reference numeral 14 denotes an outer conductor of the socket 12. The outer conductor 14 is formed in a substantially cylindrical shape by a conductor, and protrudes from one end of the socket 12 in the axial direction from a portion where the dielectric insulator is provided. The cylindrical portion 14a is integrally formed. The cylindrical portion 14a has an inner diameter of the base portion larger than that of the tip portion.
It is formed so that it becomes. Invite to this part with a large inside diameter
The electrical insulator 5 is adjusted so that its inner diameter is substantially equal to the tip.
At a cylindrical shape. This cylindrical part is shown in FIG.
Indicated by reference numeral 5a. The cylindrical portion 14a has a tapered hole 16 for holding an engaging ball 15 made of a steel ball.
Are provided at intervals in the circumferential direction, and a coupler socket 17 as a cylindrical slider is movably mounted in the axial direction. An end of the outer conductor 14 opposite to the cylindrical portion 14a is connected to a communication device (not shown) in the same manner as in the related art.

Each of the tapered holes 16 is disposed on a plane orthogonal to the axis of the cylindrical portion 14a and on the same plane, and is formed along the radial direction so as to pass through the inside and outside of the cylindrical portion 14a. Have been. Furthermore, this tapered hole 16
The diameter is gradually reduced toward the axis of the cylindrical portion 14a. The opening diameter of the portion of the tapered hole 16 that opens on the inner peripheral surface of the cylindrical portion 14a is as follows:
The ball 15 is inserted into the innermost portion of the tapered hole 16 (the cylindrical portion 1).
4a when inserted up to the axial center side of 4a).
5 is set to have such a size that a part of the portion 5 faces inward from the cylindrical portion 14a.

That is, the tapered hole 16 is
5 is formed so as to be able to protrude and retract with respect to the inner peripheral surface of the cylindrical portion 14a. The depth dimension of the tapered hole 16 (thickness dimension of the cylindrical portion 14a) is such that when the ball 15 is positioned at the innermost portion of the tapered hole 16, the surface of the ball on the outer peripheral surface side of the cylindrical portion 14a is The dimensions are set so as to be substantially flush with the surface. In this embodiment,
The tapered holes 16 are formed at four places in the cylindrical portion 14a.

The coupler socket 17 is provided on the cylindrical portion 1.
4a is formed in a substantially cylindrical shape to be fitted to the outer periphery of the cylindrical portion 1a.
4a is movably supported on the outer peripheral portion along the axial direction. Further, a portion on the left side in the figure of the inner peripheral portion of the coupler socket 17 is formed so as to have an inner diameter larger than a fitting portion with the cylindrical portion 14a. Then, the coupler socket 17 is inserted into the space formed between this portion and the cylindrical portion 14a on the right side (the plug 13 side) in the drawing.
The compression coil spring 18 for biasing the spring is elastically mounted. One end of the compression coil spring 18 is in contact with the cylindrical portion 14a, and the other end is in contact with the coupler socket 17.

A protruding space for the ball 15 to protrude outward from the cylindrical portion 14a from the tapered hole 16 is formed at the end of the inner periphery of the coupler socket 17 opposite to the compression coil spring 18. An annular recess 19 is formed. The annular recess 19 is provided in the coupler socket 1.
7 is formed such that the inner diameter is larger than the fitting portion of the inner peripheral portion 7 with the cylindrical portion 14a. The depth of the annular recess 19 in the radial direction of the coupler socket 17 is such that when the ball 15 projects out of the cylindrical portion 14a from the tapered hole 16 and abuts against the peripheral surface of the annular recess 19, the ball 15 The dimensions are set so as not to protrude inward from the inner peripheral surface of the cylindrical portion 14a.

The coupler socket 17 is prevented from falling out of the cylindrical portion 14a by bringing the annular concave portion 19 into contact with a retaining ring 20 fitted and fixed to the cylindrical portion 14a. The mounting position of the retaining ring 20 is such that the cylindrical portion 14a on the inner peripheral surface of the coupler socket 17 is in a state where the coupler socket 17 is in contact with the retaining ring 20 by the spring force of the compression coil spring 18.
Is positioned such that the fitting portion thereof just faces the ball 15.

That is, when the coupler socket 17 is in contact with the retaining ring 20 and movement to the right in the figure is restricted, the ball 15 moves from the tapered hole 16 to the cylindrical portion 14a by the inner peripheral surface of the coupler socket 17. Cannot be projected outward, and is held at the innermost part of the tapered hole 16. When the coupler socket 17 is moved to the left from the position shown in the drawing against the spring force of the compression coil spring 18 so that the annular concave portion 19 faces the ball 15,
The ball 15 can protrude from the tapered hole 16 to the outside of the cylindrical portion 14a. At this time, the ball 15 does not protrude inward of the cylindrical portion 14a.

Reference numeral 21 denotes an outer conductor of the plug 13, and the outer conductor 21 has an engaging portion 22 at the tip thereof which is formed by the cylindrical portion 14a.
Is formed in a substantially cylindrical shape that can be fitted in the base of the . sand
In other words, this connector is in the front position in the connection state shown in FIG.
The engaging portion 22 is the circle of the dielectric insulator 5 on the socket 12 side.
It has a structure facing the inside of the cylindrical portion 5a. The engaging part 2
In the outer peripheral portion of 2, a series of concave grooves 23 into which the balls 15 are engaged are formed without interruption along the circumferential direction. The two side surfaces 23a of the concave groove 23 are inclined such that the groove width gradually increases from the groove bottom surface toward the opening side. The inclination of the side surface 23a is such that the ball 15 is rolled on the side surface 23a by moving the plug 13 along the axial direction, and the concave groove 2 is formed.
3 to get it out. That is, the side surface 23a
Constitutes the inclined cam surface.

Further, the position where the concave groove 23 is formed is located at a position just opposite to the ball 15 in a state where the end surface of the large diameter portion 21a of the outer conductor 21 is in contact with the tip of the cylindrical portion 14a. ing.

Reference numeral 24 denotes an O-ring.
An annular groove 25 formed in the engaging portion 22 of the outer conductor 21
The engagement portion 22 and the cylindrical portion 1
4a. That is, the O-ring 24 is airtightly interposed between the outer conductor 14 of the socket 12 and the outer conductor 21 of the plug 13.

In the connector 11 for a coaxial cable constructed as described above, in order to attach and detach the plug 13 to and from the socket 12, the coupler socket 17 of the socket 12 resists the spring force of the compression coil spring 18 from the position shown in the drawing. The ball 15 is moved to the left so that the annular concave portion 19 faces the ball 15. That is, the coupler socket 17 is moved to the left from the state shown in FIG. 1 as described above, and then the plug 13 is moved to the right with respect to the socket 12 along the axial direction, thereby pulling out the socket 12. Can be. At this time, the ball 15 is pushed into the tapered hole 16 by the side surface 23a of the concave groove 23, whereby the engagement between the ball 15 and the concave groove 23 is released, and the plug 13
Is moved to the right along the axial direction and is pulled out of the center conductor 6 of the socket 12.

In order to connect the plug 13 to the socket 12 from which the plug 13 has been removed, first, the coupler socket 17 is moved to the left in the same manner as described above, and the plug 13 is inserted into the cylindrical portion 14a of the socket 12. The engaging portion 22 of the plug 13 is fitted. This fitting operation is performed linearly along the axial direction. At the time of fitting, first, the O-ring 24 is
a, and then the center conductor 10 of the plug 13 fits into the center conductor 6 of the socket 12. That is, the outer conductor and the center conductor of the socket 12 and the plug 13 are electrically connected to each other.

Then, until the large-diameter portion 21a of the outer conductor 21 comes into contact with the tip of the cylindrical portion 14a, the engaging portion 22 is moved into the cylindrical portion 1
The plug 13 is connected to the socket 12 by pushing it into 4 a and releasing the coupler socket 17. That is, at this time, the groove 23 is positioned at a position facing the ball 15, and the ball 15 is moved to the deepest portion of the tapered hole 16 by the coupler socket 17, and
3 is engaged with the plug 13 by this engagement.
Will be stopped. In addition, ball 15 or concave groove
23 is worn, and the plug 13 is
Even if it moves slightly in the direction
Of the dielectric insulator 5 on the socket 12 side
It is maintained in a state covered by the cylindrical portion 5a.

Accordingly, since the plug 13 can be detached by moving the plug 13 in the axial direction with respect to the socket 12, no rotational force is applied to the center conductors 6, 10. Further, even if water intrudes into the inside from the engagement portion between the outer conductors 14 and 21, this water is
As a result, penetration into the center conductors 6 and 10 is prevented.

In this embodiment, an example is shown in which four tapered holes 16 and four balls 15 are provided in the cylindrical portion 14a, but the numbers thereof can be changed as appropriate. Also,
In the present embodiment, the O-ring 24 is supported by the plug 13, but may be supported by the cylindrical portion 14a of the socket 12.

[0034]

As described above, in the coaxial cable connector according to the first aspect of the present invention, the outer conductor is filled with the dielectric.
Female type with a center conductor provided in the center of this dielectric
Consists of a connector body and a male connector body.
Center conductors and outer conductors of the connector body
In detachable coaxial cable connectors,
A cylindrical portion is projected from the external conductor of the female connector body,
The inner diameter of the base of the cylindrical part of
A dielectric is provided in a portion having a large inner diameter, and the inner diameter is substantially equal to that of the tip portion.
The male connector is extended cylindrically to be equal
Connect the outer conductor of the main body to the outer conductor of the female connector main body.
Into the cylindrical portion to be conducted and the end thereof is a female type.
Inside the cylindrical portion of the dielectric of the connector body
At the tip of the cylindrical portion, a tapered hole for holding the engaging ball so as to be able to protrude and retract from the inner surface of the cylindrical portion is formed. A cylindrical slider having a radial portion formed thereon is movably fitted, and a concave portion is formed in the outer peripheral portion of the external conductor of the male connector main body so that the ball engages with the male connector main body. On the other hand, attachment / detachment is performed by moving in the axial direction.

Therefore, the coaxial cable connected to the male connector body is not twisted when the male connector body is attached to and detached from the female connector body. Therefore, the twisted coaxial cable does not loosen the male connector main body, and does not cause a fastening failure.

At the same time, since an excessive rotational force is not applied to the center conductor, the center conductor is not cut or broken. Moreover, the center conductor of the male connector main body and the center conductor of the female connector main body only move relative to each other in the axial direction at the time of attachment and detachment. In addition, like the connector of the present invention,
The female connector body and the male connector body are
In the combined structure, the ball and recess are repeatedly attached and detached.
If the contact surface of the ball is worn, even if the ball is
Male connector body in axial direction with respect to female connector body
You will be able to move slightly. But as mentioned above
As shown in the figure, a cylindrical part is formed on the dielectric and the male connector
By adopting a structure in which the tip of the
When the main body is connected, the female connector
Even if it moves away from the
Around the center conductor of the female connector body on the female connector body side
Can be covered with a dielectric.

A connector for a coaxial cable according to a second invention is the connector for a coaxial cable according to the first invention, wherein the outer conductor of the female connector main body and the outer conductor of the male connector main body fitted into the outer conductor are provided. Since an O-ring is pressed between the conductors on the peripheral surfaces of both outer conductors, even if water intrudes from the joint between the outer conductors, the water can penetrate into the center conductor by the O-ring. Will be blocked.

Therefore, it is possible to reliably prevent a short circuit between the outer conductor and the center conductor due to infiltration of water, and to prevent a contact portion between the center conductors from being corroded and causing poor conduction. .

[Brief description of the drawings]

FIG. 1 is a sectional view of a coaxial cable connector according to the present invention.

FIG. 2 is a cross-sectional view of a conventional coaxial cable connector.

[Explanation of symbols]

 Reference Signs List 5 dielectric insulator 6 center conductor 7 coaxial cable 9 dielectric insulator 10 center conductor 11 connector for coaxial cable 12 socket 13 plug 14 outer conductor 14a cylindrical portion 15 ball 16 taper hole 17 coupler socket 21 outer conductor 22 engaging portion 23 concave groove 24 O-ring

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-48-48990 (JP, A) JP-A 6-15287 (JP, U) JP-A 63-118175 (JP, U) JP-A 54- 126093 (JP, U) Hikaru 2-84282 (JP, U)

Claims (2)

(57) [Claims] 1. An outer conductor is filled with a dielectric material.
A coaxial cable connector comprising a female connector main body and a male connector main body provided with a center conductor at a center portion of a dielectric, and the center conductors and the outer conductors of the connector main bodies are detachably provided. Ko
A cylindrical part protrudes from the outer conductor of the connector body, and this cylindrical part
The inner diameter of the base is made larger than that of the tip,
The inner diameter of the dielectric is approximately equal to the tip
So as to extend cylindrically outside the male connector body.
The conductor is defined by the circle in the outer conductor of the female connector body.
It is inserted into the cylinder and is conductive, and the tip is a female connector
A structure facing the inside of the cylindrical portion in the dielectric of the body
A tapered hole is formed in the distal end of the cylindrical portion so as to gradually decrease in diameter toward the axis of the cylindrical portion and holds the engagement ball so as to be able to protrude and retract from the inner surface of the cylindrical portion. A cylindrical slider formed with a small-diameter portion and a large-diameter portion for projecting and retracting the ball on the inner surface of the cylindrical portion is movably fitted along the axial direction thereof, and the outer periphery of the outer conductor of the male connector main body is A connector for a coaxial cable, wherein a recess is formed in the portion to engage the ball. 2. The coaxial cable connector according to claim 1, wherein: an outer conductor of the female connector main body and an outer conductor of the male connector main body fitted into the outer conductor.
A connector for a coaxial cable, comprising an O-ring that is pressed against the peripheral surfaces of both outer conductors.