JPS644219Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a T-branch used when connecting other coaxial cables or wiring board circuits in a direction approximately perpendicular to the longitudinal direction of the coaxial cable at an intermediate position of the coaxial cable. This invention relates to a contact for contacting an internal conductor of a coaxial connector.

At an intermediate position of the coaxial cable to be connected, perpendicular to the longitudinal direction of the coaxial cable to be connected,
Coupling with other coaxial cables or circuits on wiring boards may be required when adding cable lines or attaching test circuits to cables. To meet such requirements, insert a probe with a center conductor and a pointed end into the coaxial cable to be connected at right angles to its longitudinal direction, and insert the tip of the center conductor into the inside of the coaxial cable to be connected. A T-branch coaxial connector that makes contact with a conductor has been proposed.

In this type of T-branch coaxial connector, the inserted center conductor is in contact with the inner conductor of the coaxial cable to be connected, and the coaxial cable is connected to other coaxial cables or circuits on the wiring board through the probe. will be held.

In other words, when the coaxial cable to be connected is fixed to the mounting base using a movable body, the tip of the probe attached to the mounting base will move the coaxial cable to be connected at almost right angles to the longitudinal direction of the coaxial cable. It sequentially pierces the outer insulation coating and outer conductor to contact the inner conductor. Alternatively, when a probe with a thread formed on the outer periphery is screwed into a screw hole formed in the mounting base for a coaxial cable to be connected that is fixedly held on a mounting base, the tip of the probe will touch the outer insulation coating of the coaxial cable to be connected. , a structure in which the outer conductor is successively pierced to contact the inner conductor has also been proposed.

However, with any of the conventionally proposed methods, if the probe is inserted in the wrong direction into the coaxial cable to be connected, the center conductor of the probe inserted into the coaxial cable will not make complete contact with the inner conductor of the coaxial cable to be connected. There is a risk that it will not be carried out. Additionally, the center conductor of the probe may come into contact with the outer conductor of the coaxial cable to be connected, resulting in a coupling accident.

This invention solves the various problems with the conventionally proposed methods, and makes it possible to make reliable and stable contact with the inner conductor of the connected coaxial cable, and prevent erroneous contact with the outer conductor of the connected coaxial cable. The present invention provides a contact for contacting the internal conductor of a T-branch coaxial connector that does not require any damage.

According to this invention, a U-shaped plate-like contact body made of a metal material is provided, and this contact body has both plate surfaces, with the inner edges of both legs of the U-shape facing each other. Covered from the sides with an insulator. When the contact is inserted into the coaxial cable to be connected at a nearly right angle to its longitudinal direction, the center conductor of the coaxial cable to be connected is held between the legs of the contact body, and this holding allows the coaxial cable to be connected to The center conductor of the contact is configured to make electrical contact with the contact body of the contact.

Hereinafter, the T-branch coaxial connector inner conductor contact of this invention will be described in detail based on its embodiments using the drawings.

FIG. 1 is a perspective view showing the structure of an embodiment of this invention. In this embodiment, the contact body 11 is a first
The second contact plates 11-1 and 11-2 are arranged in a stacked manner. The first contact plate 11-1 is formed of a metal material into a plate shape, and both legs 12-11, 12-12 are formed at the ends thereof, and a U-shaped notch 13-1 is formed between these two legs. 1
is formed. The width of this notch 13-1, that is, the distance between the legs 12-11 and 12-12, is set to a value slightly smaller than the outer diameter of the center conductor 16 of the coaxial cable 15 to be connected. Both legs 12-11,
Each end of 12-12 is extended such that its circumferential surfaces approach each other to form a protruding point.

The second contact plate 11-1 has approximately the same shape as the first contact plate 11-1.
The contact plate 11-2 is formed of a metal plate.
Both legs 12-2 of second contact plate 11-2
1, 12-22, the distance between the opposing inner peripheral surfaces, that is, U
The width of the U-shaped cut 13-2 is the same as the U-shaped cut 13-1.
It is set slightly wider than the width of the . Further, the length in the longitudinal direction of the U-shaped notch 13-2 of the second contact plate 11-2 is longer than that of the first contact plate 11-2.
The length in the longitudinal direction of the U-shaped notch 13-1 is set shorter than that of the U-shaped notch 13-1.

The first and second contact plates 11-1, 11-2 are arranged so that their respective pointed portions are aligned and overlapped, and the contact body 11 thus arranged is covered with the insulator 17. In this case, the insulator 17 covers the entire surface of the contact body 11, except for the inner edge portions of both legs of the U-shape of the contact body 11 that are arranged opposite each other.

In the case where the wiring board 21 is coupled to the connected coaxial cable 15 at an intermediate position, an example will be described in which the T-branch coaxial connector inner conductor contact of this invention is used.

With respect to the holder 20 shown in FIG. 5, in which a U-shaped holding part 20-U is formed from one end side with a width slightly larger than the outer diameter of the coaxial cable 15 to be connected.
A coaxial cable 15 to be connected is sandwiched and arranged. A stepped portion 22 is formed on one plate surface of this holder 20, and the connected coaxial cable 15 held within the holding portion 20-U protrudes less than the stepped portion 22 when attached to the holder 20. It is held against Using a cutter 23, the insulating coating 25 and outer conductor 26 of this protruding portion are removed from a portion of the coaxial cable 15 to be connected by a width approximately equal to the width of the stepped portion 22, thereby forming an incision groove 29.

Connected coaxial cable 15 with cut groove 29 formed
is arranged in the mounting groove 31 of the mounting base 30 as shown in FIG. An insulator 17, on which the contact body 11 is covered and fixed, is fixed to a block-shaped insulating base 32, and from the end of this insulating base 32, an extraction terminal 11-t connected to the contact body is protruded. The structure is as follows.

Such an insulating base 32 is attached to the contact body 1.
The contact main body 11 is moved so that both legs of the contact body 11 are positioned in the cut groove 29, and the pointed part of the contact body 11 is press-fitted into the inner insulating layer 27 of the coaxial cable 15 to be connected through the cut groove 29 portion. As the pointed portion is press-fitted into the coaxial cable 15 to be connected, the coaxial cable 15 to be connected is inserted into the coaxial cable 15 at the end _P1 of the U-shaped notch 13-2 of the second contact plate 11-2, as shown in FIG. The press-fitting is stopped at the position where the inner conductor 16 is contacted. In this position, the first contact plate 1
1-1 is in contact with the internal conductor 16 at points _P2 and _P3 on the inner edge portions that are opposite to each other.

The contact body 11 press-fitted into the coaxial cable 15 to be connected does not come into electrical contact with the outer conductor 26 of the coaxial cable 15 to be connected due to the presence of the insulator 17. Also, the inner conductor 16 of the coaxial cable 15 to be connected and the contact body 11 are at a point.
A stable contact state is maintained at three points: P ₁ P ₂ P ₃ .
Moreover, point P ₁ exists on the second contact plate 11-2, and point P ₂ P ₃ exists on the first contact plate 11-1.
The first and second contact plates 11-
1 and 11-2 are adjacent to each other in the longitudinal direction of the connected coaxial cable 15 and their positions are shifted from each other, so this three-point support is extremely stable.

On the other hand, as shown in FIG. 7, a substantially rectangular insulator 35 is fixed to the wiring board 21 around the output terminal t-2 of the wiring board 21 connected to the connected coaxial cable 15, and Terminal t-2 is disposed within the opening 36 of this insulator 35. The wiring board 21 with the insulator 35 attached thereto faces the bottom plate 37 made of an insulating material and is fixed with screws.

In this facing fixing means, the opening 38 formed in the bottom plate 37 and the position of the insulator 35 attached to the wiring board 21 correspond to each other. Further, external conductor connection spacers 40-1 and 40-2 are fixedly attached to the bottom plate 37 so as to sandwich the opening 38 therebetween.
are openings 41-1 and 41 formed in the wiring board 21.
−2 positions.

With the wiring board 21 fixed to the bottom plate 37, as shown in FIG. 8, the insulating base 32 is fixed by inserting the opening 38 into the coaxial cable to be connected.
The wiring board 21 is placed on the mounting base 30 on which the coaxial cable 15 to be connected is arranged so as to match the position.
A bottom plate 37 to which is fixed is provided. In this arrangement state, the extraction terminal 11-t is inserted into the opening 36 of the insulator 35, and the extraction terminal 11-t and the extraction terminal 11-t are inserted into the opening 36 of the insulator 35.
and fit together.

An insulating case 45 is placed so as to cover the wiring board 21 disposed on the mounting base 30, and the insulating case 45, the bottom plate 37, and the mounting base 30 are fixed to each other with screws. In addition, in this arrangement state, the external conductor connecting screws 43- are inserted into the external conductor connecting spacers 40-1, 40-2 from the openings 41-1, 41-2.
1 and 43-2 are screwed in, and their ends are embedded in and in contact with the outer conductor 26 of the coaxial cable 15 to be connected.

Therefore, the ends of the external conductor connecting screws 43-1 and 43-2 protruding from the wiring board 21 serve as extraction terminals for the external conductor 26 of the coaxial cable 15 to be connected.

In this way, the inner conductor contact of this invention is used to connect the wiring board 21 to the coaxial cable 15 at right angles to the longitudinal direction of the connected coaxial cable 15.
are electrically coupled. If you use this invented T-branch coaxial connector internal conductor contact,
As described above, the internal conductor 16 of the coaxial cable 15 to be connected and the contact 11 can be reliably brought into contact at the correct position with a simple operation, and accidents due to poor contact will not occur.

As explained in detail above, by using the contacts for contacting the internal conductor of the T-branch coaxial connector of this invention, it is possible to realize a T-branch coaxial connector that performs accurate and stable electrical coupling operation with simple operation. becomes.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the structure of the main part of the contact for contacting the internal conductor of the T-branch coaxial connector of this invention, and FIGS. 2 and 3 are for contacting the internal conductor of the T-branch coaxial connector of this invention. A cross-sectional view and a front view showing how the contact is attached to the cable to be connected in an embodiment of the invention, FIG. 4 is a cutaway view showing the configuration of a T-branch coaxial connector using this invention, and FIG. 5 is a diagram showing the coaxial cable to be connected. 6 is a diagram showing how to attach the contact body to the coaxial cable to be connected. FIG. 7 is a diagram showing how to assemble the wiring board and the bottom plate. FIG. 8 is a diagram showing how to assemble the wiring board and the bottom plate. FIG. 1 is an assembly diagram showing the configuration of a T-branch coaxial connector using this invention. 11: Contact body, 11-1, 11-2:
Contact plate, 12-11, 12-12, 12-
21, 12-22: Both legs, 13-1, 13-
2: Notch, 15: Connected coaxial cable, 16:
Internal conductor, 17: Insulator, 20: Holder, 26:
outer conductor.

Claims (1)

[Claims for Utility Model Registration] A contact body consisting of a stack of first and second plate-shaped contact plates made of a metal material and having a U-shaped notch; and a plate-shaped insulator covering the first contact plate except for the inner edge portions thereof, the width of the U-shaped notch of the first contact plate is smaller than that of the second contact plate, and the coaxial cable to be connected is The depth of the U-shaped cut in the first contact plate is set to be larger than that of the second contact plate, and the depth of the U-shaped cut in the first contact plate is set to be slightly smaller than the outer diameter of the inner conductor of the coaxial cable to be connected. A contact for contacting an internal conductor of a T-branch coaxial connector, which is inserted at a right angle and is configured to sandwich the center conductor of the to-be-connected coaxial cable between the legs and make electrical contact with the center conductor.