JPH0135419Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial Application Field" This invention relates to a small diameter coaxial connector used for connecting coaxial cables.

"Prior Art" A coaxial cable connector is used to connect the core wire of a coaxial cable to, for example, a predetermined contact on a circuit board.

Figures 1A to 1C are diagrams showing how to connect a coaxial cable to this type of connector that has been used conventionally.The nut 10 is inserted into the coaxial cable 11 in advance, and the coaxial cable is connected as shown in A in the figure. 1
At the end of 1, the outer sheath 12 is removed to expose the outer conductor 13. Next, as shown in FIG. 1B, the outer conductor 13 is cut to a predetermined length and folded back toward the toroidal body 14 through which the coaxial cable 11 is inserted.
The exposed internal insulator 15 is cut to a predetermined length to expose a predetermined length of the core wire 16 at the tip.

A center contact 17 whose tip is formed to be able to fit into a pin contact is fixed to this core wire 16, and in this state, the coaxial cable 11 is inserted and fitted into the jack 21, and screwed and fixed with the nut 10. Then, the structure shown in FIG. 2 is obtained.

On the other hand, when attaching to the plug 22, a pin contact 23 with a pin-shaped tip is connected to the core wire 16 for the coaxial cable treated as shown in FIG. 1A and B.
Fixed to. In this state, when the coaxial cable is screwed and fixed to the plug 22 using the nut 10, the structure shown in FIG. 3 is obtained. Jack 21 and plug 2 each have a coaxial cable attached in this way.
2 are fitted together, the center contact 17 fixed to the end of each coaxial cable and the pin contact 23 are fitted together, and the coaxial cables are connected.

However, this conventional structure has a large number of parts and is relatively complicated to manufacture, and it is difficult to manufacture a device with a compact shape. Furthermore, there are some parts that must be attached to the coaxial cable in advance for connection, and furthermore, when attaching the coaxial cable to the plug and jack, it is necessary to accurately set and cut the protruding length of the internal insulator 15 and core wire 16 of the coaxial cable. ,
Connection operation is not easy.

``Problems to be solved by the invention'' This invention solves the drawbacks of these conventional connectors, allows the overall structure of the connector to be simple and has a significantly reduced size, and is specially designed for coaxial cables. To provide a coaxial cable connector that can be easily installed and installed without any additional processing.

"Structure of the invention" In this invention, a cylindrical holder is formed of an insulating material and has an insertion hole for a mating pin contact at one end.This cylindrical holder is divided into two parts parallel to the axis, and It is configured to be rotatable around a parallel rotation axis. A center contact is arranged on one end side of one half of the cylindrical holder, and a narrow diameter portion with a narrowed outer circumferential radius is formed on the other end side of the one half of the cylindrical holder.

The ferrule is arranged so as to fit into the narrow diameter portion formed in this way, and the coaxial cable to be connected to the ferrule is attached.
It is extended within one half. A shielded wire of a coaxial cable extended inside one half is drawn out along the outer peripheral surface of the other half of the cylindrical holder of the ferrule. On the other hand, the core wire of the coaxial cable is connected to the center contact so as to cover the center contact and the coaxial cable disposed within the one half,
One half is covered with the other half.

Furthermore, the cylindrical outer conductor is fitted so as to cover the cylindrical holder and the ferrule from the outer peripheral surface, and the outer conductor is caulked and fixed to the ferrule at the position where the shield wire is pulled out. In this state, the pin to be connected, which is inserted from one end of the cylindrical holder, is connected to the center contact.

``Example'' Hereinafter, the small diameter coaxial connector of this invention will be described in detail based on an example using the drawings.

A cylindrical holder is formed of an insulating material and has an insertion hole for a mating pin contact formed at one end. Constructed to rotate freely.

In the embodiment, a holder 1 is formed in a cylindrical shape from an insulating material such as a synthetic resin material, and a pin insertion hole 2 is formed at one end of the holder 1. A taper with a narrowed diameter is formed.

Except for this insertion hole 2 portion, the holder 1 is divided into two along a plane passing through the axis, and in the embodiment, one half 3 and the other half 4 are connected to the hinge 5-1,
5-2, and are configured to be relatively rotatable around these hinges.

A center contact is disposed at one end of one half of the cylindrical holder, and the outer radius of this half is narrowed at the other end to form a narrow diameter section, and the ferrule is attached to the outer circumference of this narrow diameter section. The inner peripheries are in contact with each other, and the ferrule is fitted to one half of the ferrule.

As shown in FIG. 6, the center contact 6 is made of a conductive material and has a cylindrical shape, and has an insertion hole 7 formed at one end thereof into which a mating pin to be connected is inserted. The end of the center contact 6 opposite to the insertion hole 7 is extended into a plate shape to form a connection piece 8. The connecting piece 8 extends from one edge of the cylindrical portion of the center contact 6 in a direction approaching the axis, and has an extended shape on the axis of the center contact 6.

The center contact 6 is configured to be attached to the pin insertion hole 2 side within the half portion 3 of the holder 1, as shown in FIG.

That is, in the half portion 3, a recessed portion 20 is formed over an area slightly longer than the total length of the cylindrical portion of the center contact 6 and the portion of the connecting piece 8 that is not located on the axis. On the other hand, a recess 9 is formed at a corresponding position in the other half 4 of the holder 1, and the length of the recess 9 in the longitudinal direction is set to be slightly longer than the length of the cylindrical portion of the center contact 6.

In addition, a through hole 2 having a diameter larger than the core wire of the coaxial cable to be connected is connected to the recess 20 and is located at the axial center of the holder 1 with one half 3 and the other half 4 covered.
1-R is formed.

A center contact 6 disposed in a recess 20 formed in one half 3 is located in the holder 1 by covering the other half 4 with respect to the first half 3, and its connecting piece 8 is located on the flat portion 23 formed on the inner periphery of the insertion hole 21-R. In this arrangement, the center contact 6 can be attached within the recesses 9 and 20 of the holder 1 with some margin for deformation and movement in the axial direction.

One half 3 of the holding body 1 has a narrow diameter portion 2 whose outer diameter is narrowed in the end region on the side of the through hole 21-R.
5 is formed. An engaging protrusion 26 is integrally formed approximately at the center of the narrow diameter portion 25 in the axial direction. In the area from the through hole 21-R of the holder 1 to the end opposite to the insertion hole 2, the through hole 21-R is connected to the holder 1 with one half 3 and the other half 4 covered. A mounting hole 27 is formed continuously. The inner diameter of this attachment hole 27 is set to be slightly larger than the outer diameter of the inner coating layer 28 of the coaxial cable to be connected.
Furthermore, an inner coating layer 28 is provided on the inner peripheral surface of the mounting hole 27.
A plurality of protrusions 30 are formed so as to be in contact with the outer circumferential surface of. Further, a plurality of protrusions 31 are provided on the outer peripheral surface of the other half portion 4 at a position corresponding to the narrow diameter portion 25 of the holding body 1.
is formed.

The ferrule 33 is formed into a cylindrical shape as shown in FIG. 13, and one end thereof is cut away parallel to the axis to form a notch 34. This notch 34
On the peripheral surface of the ferrule 33 facing the holding body 1
An engagement hole 35 that engages with the engagement protrusion 26 is formed. The length of the engagement hole 35 in the axial direction is equal to the length of the engagement protrusion 2.
6 in the axial direction.

Further, near the end of the ferrule 33 on the opposite side from the notch 34, a plurality of protrusions 36 formed by cutting and raising the circumferential surface of the ferrule 33 are provided. The inner diameter of the ferrule 33 is the same as the outer diameter of the narrow diameter portion 25 of the holder 1, and is set slightly smaller than the outer diameter of the coaxial cable to be connected.

The inner periphery of the ferrule is attached to the outer periphery of the narrow diameter portion formed in one half of the cylindrical holder, and the coaxial cable to be connected to the ferrule is inserted and attached to the ferrule. The shield wire of the coaxial cable is drawn out to the other half of the cylindrical holder of the ferrule.

That is, as shown in FIG. 5A, the coaxial cable 38 to be connected is inserted through the ferrule 33, and as shown in FIG.
As shown in FIG. 2, the tip thereof is arranged to protrude from the end on the notch 34 side. In this state, Ferrule 33
In the protruding portion from the end on the notch 34 side,
The outer sheath 4 of the coaxial cable 38 is removed, and the shield wire 40 is pulled out to the notch 34 side.

Further, at the exposed tip of the inner coating layer 28, the inner coating layer 28 is removed and the core wire 43 is exposed.
For the connecting piece 8 of the center contact 6, FIG.
As shown in FIG. 2, the core wires 43 are connected by means of welding, for example.

The holder 1 has one half 3 open to the other half 4, and the center contact 6 to which the core wire 43 of the coaxial cable 38 is connected is located in the half 3 of the support 1.
It is arranged in the recess 20 of. In this state, the ferrule 33 is inserted through the coaxial cable 38. When disposed in the recess 20 of the half 3 of the center contact 6, the coaxial cable 38 is extended in the axial direction within the half 3, and the inner coating layer 28 is
It is disposed within the half portion 3 so as to be opposed to the inner circumferential surface portion that constitutes the attachment hole 27 .

In this way, when the center contact 6 and the core wire 43 are connected to the center contact 6, the coaxial cable is connected to the one half 3, and the other half 4 is connected to the other half 3.
Rotate and close the lid. As shown in FIG. 7, the ferrule 33, which is fitted onto the coaxial cable 38, is fitted into the holder 1. From the state shown in Figure 7,
The ferrule 33 is moved in the axial direction so as to approach the holding body 1. Due to this movement, the engagement hole 35 of the ferrule 33 engages with the engagement protrusion 26 formed on the one half 3 of the holder 1.

In this moving state, the notch 3 of the ferrule 33
The end portion of the coaxial cable 4 approaches the holder 1, leaving a margin (α in FIG. The shape of the ferrule 33 is set to match the removal position. Shield wire 4 drawn out on the outer peripheral surface of ferrule 33
0 extends in the axial direction on the outer circumferential surface of the ferrule 33 on the side facing the engagement hole 35 .

In this state, as shown in FIG.
A cylindrical external conductor 45 is inserted from the pin insertion hole 12 side. The drawn-out shield wire 40 is held between the outer circumferential surface of the ferrule 33 and the inner circumferential surface of the outer conductor 45 by the outer conductor 45 . A groove 50 is formed at approximately the center of the outer conductor 45 to prevent it from coming off when connected to a mating connector.

As shown in FIG. 10, taken along the line B-B in FIG. However, the center positions of the outer conductor 45 and the ferrule 33 are shifted. A shielded wire 40 is extended within the gap between the outer conductor 45 and the ferrule 33, and this shielded wire 40
is electrically connected to the outer conductor 45. In order to make this electrical connection completely, the outer conductor 45 is caulked into a hexagonal shape, for example, as shown in FIG. .

Furthermore, a heat-shrinkable tube 46 is inserted into the ferrule 33 from the protrusion 36 side of the ferrule 33, and is heated and contracted to engage and fix the protrusion 36 with the inner peripheral surface of the heat-shrinkable tube 46.

"Effects of the Invention" The small-diameter coaxial connector of this invention has a simple and compact overall structure, and the coaxial cable can be easily attached. The holding body 1 and the ferrule 33 are
The engagement protrusion 26 and the engagement hole 35 are engaged, and the length of the engagement hole 35 in the axial direction is larger than the length of the engagement protrusion 26 in the axial direction. The load applied by the inserted mating pin can be absorbed by the ferrule 33 portion. Therefore, no overload is applied to the coaxial cable during connection, and the coaxial cable can be attached smoothly.

A shield wire 40 is led out in a concentrated manner on the outer circumferential surface of the ferrule 33, and a cylindrical external conductor 45 covers the shield 40 and is caulked and fixed to the ferrule 33. Therefore, the electrical connection of the shielded wire 40 to the outer conductor 45 is reliably performed by this caulking, and the diameters of the outer conductor 45 and the ferrule 33 are not required to be precisely set during manufacturing, which is advantageous in manufacturing. be.

The overall number of components is small, making it easy to manufacture and assemble, and the overall size can be reduced. The insertion hole 12 portion of the mating pin contact of the holder 1 is not divided into two parts, and the mating pin contact and the center contact 6 are separated.
The connection will also be established reliably.

[Brief explanation of the drawing]

1A, B, and C are diagrams showing a conventionally proposed coaxial cable connection processing method, and FIG. 2 is a diagram showing a state in which a coaxial cable is attached to a conventionally proposed coaxial cable jack. Fig. 3 is a diagram showing a state in which a coaxial cable is attached to a conventionally proposed coaxial cable plug, and Fig. 4 is a plan view showing the configuration of an embodiment of this invention with the other half open. Figures 5A, B, C, and D are sequential views showing the installation process of the coaxial cable to the ferrule and center contact in an embodiment of this invention, respectively, and Figure 6 is a diagram showing the implementation of this invention. FIG. 7 is a cross-sectional view showing how the coaxial cable is attached to the holder in the embodiment of this invention; FIG. 8 is the holder and ferrule in the embodiment of this invention. FIG. 9 is a partially cutaway view showing the state in which the coaxial cable is attached in an embodiment of this invention, and FIG.
9 is a sectional view taken along line B-B, FIG. 11 is a front view showing the structure of an embodiment of this invention, FIG. 12 is a front sectional view showing the structure of an embodiment of this invention, and FIG. 13 is a front view showing the structure of an embodiment of this invention. FIG. 14, a perspective view showing the structure of the ferrule used in the embodiment of this invention, is a view showing the embodiment of this invention in a crimped state. 1: Holder, 2: Pin insertion hole, 3: One half,
4: Other half, 5-1, 5-2: Hinge, 6: Center contact, 7: Insertion hole, 8: Connection piece, 9: Recess, 20: Recess, 21-R: Through hole, 23: Flat part , 25: Narrow diameter portion, 27: Mounting hole, 28: Internal coating layer, 30, 31: Protrusion, 33: Ferrule, 3
4: Notch, 35: Engagement hole, 36: Projection, 38:
Coaxial cable, 40: Shield wire, 41: External coating, 45: External conductor, 46: Heat shrink tube, 5
0: Retaining groove.

Claims (1)

[Claims for Utility Model Registration] A cylindrical holder is provided, and an insertion hole for a mating pin contact is formed at one end of the cylindrical holder,
The cylindrical holder is divided into two halves parallel to the axis 3 and the other half 4, and is formed to be rotatable around a rotation axis parallel to the axis, and the one end of the one half 3 A center contact 6 that contacts the mating pin contact is disposed on one side, and the other end of the one-half portion 3 has an outer circumferential radius narrowed to form a narrow diameter portion 25. cylindrical ferrule 33
The inner periphery of the ferrule 33 is connected to the coaxial cable 38.
is inserted, the coaxial cable 38 to be connected is extended on the one half 3, the core wire 43 of the coaxial cable 38 to be connected is connected to the center contact 6, and the shield of the coaxial cable 38 to be connected is connected to the center contact 6. A wire 40 is drawn out onto the outer peripheral surface of the ferrule 33 and covers the center contact 6 and the connected coaxial cable 38 disposed on the one half 3 and connects the one half 3 to the other half 4. is covered, and a cylindrical outer conductor 45 is inserted through the cylindrical holder covered in this manner, and the outer conductor 45 is caulked and fixed to the ferrule at the lead-out portion of the shielded wire 40. A small diameter coaxial connector.