JP2746137B2 - Branch type coaxial 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 branch type coaxial connector for branching a signal, and more particularly to a branch type coaxial connector suitable for branching a signal in the middle of a coaxial cable transmitting a signal of a sufficiently low frequency. .

[0002]

2. Description of the Related Art A coaxial connector for connecting two coaxial cables is, for example, as described in Japanese Utility Model Application Laid-Open No. 59-104478, in which male and female connectors are attached to the ends of coaxial cables, respectively. Had to be connected. In the case of a branch type coaxial connector for branching a signal from the middle of a coaxial cable, the branch source coaxial cable is cut in the middle when branching, and the cut end and the branch destination coaxial cable terminal are connected by a connector. Each terminal processing is performed, and furthermore, a signal is branched by connecting it to a branch-dedicated connector having a three-way connection port.

[0003]

As described above, in the latter branch-type coaxial connector, it is necessary to cut the coaxial cable in the middle of branching the signal, and to process the cut coaxial cable by the connector. For this reason, if the coaxial cable to be cut has no extra length or if the coaxial cable is laid in a place where terminal construction is physically difficult, it may be difficult to complete the terminal construction of the cut coaxial cable. There were many.

An object of the present invention is to provide a branch type coaxial connector which can branch a signal without cutting a coaxial cable.

[0005]

According to the first aspect of the present invention, (a) a cylindrical conductive contact having a sharp tip, and the tip of the conductive contact is made to protrude.
The other part has the same central axis as the conductive contact.
Cylindrical dielectric and conductive contacts
The tip of this dielectric is made so that its central axis is common.
Is a cylindrical member with the other parts buried, and the outer peripheral portion of the member
It becomes a male screw from the branch coaxial cable portion which is threaded in, this
These are integrally formed and separated from the tip of the contact.
The part of the coaxial cable section where the male screw is threaded is
A branch terminal portion which is set to a predetermined distance set in advance, this inward covers (B) hull branch origin coaxial cable
A shell body made of a conductor having an arc-shaped blade having a length reaching the braided shield wire of the coaxial cable at the branch source ;
With the original coaxial cable inserted through the shell body,
Crimp the shell body around the outer circumference of the branching coaxial cable
A crimping member that electrically contacts the blade with the braided shield wire
And insert the tip of the branch coaxial cable into a part of it.
And a shell which bored a hole that, enclose take (c) hole in the shell
A cylindrical member is provided upright at an outer peripheral position, and a female screw to be screwed with the male screw of the branch end portion is threaded therein.
With the male screw screwed into this female screw to the limit.
The tip of the electrical contact is inside the coaxial cable at the branch source
The predetermined distance described above at a position where it strikes the core conductor
The branch type coaxial connector is provided with a branch terminal mounting portion in which the threading position of the male screw is set in relation to the above.

That is, according to the first aspect of the present invention, the shell covers the outer skin of the coaxial cable of the branch source, and the blade provided inside the shell can be electrically contacted with the braided shield wire of the coaxial cable of the branch source. To Also, make a hole in a part of the shell, and place a cylinder at the outer peripheral position surrounding the hole.
The member is erected and a female screw is threaded on the inner circumference.
Then, a dielectric for insulation is arranged on the outer periphery of the contact so that the contact that makes electrical contact with the center conductor of the coaxial cable at the terminal end abuts against the center conductor of the coaxial cable at the branch source. A male screw is threaded on the outside and screwed with the female screw of the branch terminal attachment part, so that the tip of the contact can be connected just electrically to the center conductor of the coaxial cable at the branch source.
Screw position of the female and female threads and the tip of the contact and the male screw
The positional relationship of is set. This branches to the shell
Attach the original coaxial cable and connect the male thread of the contact
Is screwed into the female screw, the signal can be easily branched without cutting the coaxial cable at the branch source.

[0007]

[0008]

[0009]

[0010]

[0011]

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments.

FIG. 1 shows the appearance of a branch type coaxial connector according to an embodiment of the present invention. This branch-type coaxial connector constitutes an outer frame of the connector, and a metal shell 11 for covering the outside of a branch source coaxial cable (not shown), and vertically protrudes from a central portion of the shell 11. It is composed of a cylindrical branch terminal mounting portion 12 and a branch coaxial cable portion 13 that is screwed into a screw cut inside the branch terminal mounting portion 12.

The shell 11 has a cylindrical portion 11A obtained by cutting a portion of a cylinder in the longitudinal direction, and has a shape such that flanges 11B and 11C having a predetermined width are attached to both ends thereof. With the cylindrical portion 11A of this shell fitted into the coaxial cable (not shown) to be branched, the flanges 11B and 11C are brought closer by tightening the two screws 15 and 16 so that the cylindrical portion 11A It is pressed against the outer peripheral part and the shell 11 is connected to this coaxial cable.
Is attached. Inside the cylindrical portion 11A of the shell, there are provided two blades 18 having an arc shape at predetermined intervals.
Are arranged. Therefore, two screws 15, 16
As the blades are tightened, these blades 18 bite into the outer sheath of the coaxial cable and reach the braided shield portion inside the blade. As a result, the braided shield and the shell 11 come into electrical contact.

FIG. 2 shows a terminal processing method of the branch coaxial cable section. The branch coaxial cable section 13
The center conductor 2 of the coaxial cable 21 to be branched and connected.
2 is exposed, and the braided shield wire 24 covering the dielectric 23 is processed so as to be folded back to the outer skin 25.

Next, the central conductor 22 from which the dielectric substance 23 has been removed and exposed is fitted into a fine hole formed inside a thin cylindrical metal contact 27. Contact 2
The distal end portion 27A of 7 is formed in a conical shape so as to pierce the center conductor of the coaxial cable at the branch source. In addition, a soldering hole 28 is formed in a side portion of the contact 27, and by injecting solder from this, the contact 27 is formed.
And the center conductor 22 are soldered. The contact 27 treated in this way has a large diameter at the base substantially equal to the diameter of the coaxial cable, and the other part has a cylindrical dielectric 29 whose diameter is considerably smaller than the outer diameter of the dielectric 23 at the base side. Inserted from. The tip of the dielectric 29 is machined to form the same conical surface as the contact tip 27A.

Coaxial cable 21 for making a branch connection
After the dielectric 29 is attached in this manner, the branch coaxial cable 13 is assembled by fitting it into the hole 31A of the metal screw portion 31 having the hole 31A of the same inner surface shape. finish. At this time, a portion of the outer cover 25 including the folded braided shield wire 24 up to a predetermined length is fitted into the hole 31A, so that the folded braided shield wire 24 comes into pressure contact with the screw portion 31 and electrically contacts this portion. Connected to. On the outside of the screw portion 31, a screw to be screwed with the branch terminal mounting portion 12 shown in FIG. 1 is engraved.

The branch coaxial cable section 13 that has been subjected to terminal processing as described with reference to FIG. 2 is screwed into the branch terminal mounting section 12 as shown in FIG. At the same time, the tip 27A of the contact has a sharp conical shape, so that it advances through the inside of the coaxial cable of the branch source, and finally strikes the center conductor of the coaxial cable of the branch source, and this is electrically connected to the center conductor. Will be connected.

FIG. 3 shows a state in which the branch coaxial cable section is connected to the branch coaxial cable. In this figure, the illustration of the shell 11 and the branch terminal attachment part 12 is omitted for easy understanding of the connection state.

When the branch coaxial cable portion 13 is connected to the branch source coaxial cable 41 as described above, the contact tip 27A is connected to the center conductor 4 of the coaxial cable 41.
2 and is electrically connected thereto. Since the periphery of the contact 27 is covered with the dielectric material 29, the braided shield wire 44 disposed immediately below the outer cover 43 of the coaxial cable 41 at the branch source is electrically insulated from the contact 27. In addition, in the state where the male screw of the branch coaxial cable part 13 is completely tightened with respect to the female screw of the branch terminal attachment part 12 shown in FIG.
If the distance is set so that 7A comes into contact with the center conductor 42 of the coaxial cable 41, the distal end portion 27A can be easily positioned.

As described above, the branch type coaxial connector of the present embodiment can easily connect the branch destination coaxial cable without cutting the branch source coaxial cable 41.

In the embodiment, the tip of the contact is formed in a conical shape. However, the shape is not limited to this as long as it is sharp. Further, in the embodiment, the arc-shaped blade is arranged on the shell, but a blade having another shape may be used. Of course, these blades may be appropriately divided in the circumferential direction.

[0023]

As described above , according to the first aspect of the present invention, the outer periphery of the dielectric disposed outside the contact is provided.
Male thread is threaded on the
The connector for the coaxial cable at the branch
The arrangement position of the tact is set in advance,
And the direction of the screw and the direction of the contact match
And screw the male screw at the branch end to the female screw to the limit.
The tip of the contact to the branching coaxial cable
Can be easily and securely connected to the center conductor.
Wear. In addition, various parts such as screws are integrally formed.
So if each part is prepared separately
Unlike this, the work efficiency is extremely high,
There is an effect that it can be easily terminated.

[0024]

[0025]

[0026]

[0027]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where a coaxial cable of a branch destination subjected to a terminal treatment is attached to a branch type coaxial connector according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a state of terminal processing of a coaxial cable at a branch destination in the present embodiment.

FIG. 3 is a cross-sectional view of a main part showing a state where a branch coaxial cable section is connected to a branch source coaxial cable in the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Shell 12 Branch terminal attachment part 13 Branch coaxial cable part 15, 16 Screw 18 Blade 21 (Branch destination) coaxial cable 27 Contact 27A (Contact) tip part 29 Dielectric 41 (Branch source) Coaxial cable 42 (Branch source) Center conductor

Claims (1)

(57) [Claims] 1. A cylindrical conductive contact having a sharp tip, and a tip portion of the conductive contact protruding.
The other part has the same central axis as the conductive contact
A cylindrical dielectric covering such that the conductive Con
The tact and the central axis of this dielectric
Is a cylindrical member having a portion other than the tip portion embedded therein.
From the coaxial cable section where the male screw is threaded on the outer circumference of
And these are integrally formed and the contact
The male screw of the branch coaxial cable section is threaded from the tip of
Is set at a predetermined distance.
A branch terminal portion that, the shell body made of a conductor having a circular arc-shaped <br/> blade length of reaching the braided shield wire of the branch source of the coaxial cable to the inside covers the outer skin of the branch source of the coaxial cable, The same of the branch source
With the shaft cable inserted through the shell body,
The main body is crimped to the outer circumference of the branch source coaxial cable
A crimping member for electrically contacting the braided shield wire with
The tip of the branch coaxial cable part is
A shell having a hole to be fitted therein, and a circle erected at an outer peripheral position surrounding the hole of the shell
A cylindrical member, on the inside of which a female screw to be screwed with the male screw of the branch end portion is threaded, and the female screw is
With the end of the conductive contact screwed to the limit.
The end abuts against the center conductor of the branch source coaxial cable.
At the position of the barrel, the screw of the male screw is
And a branch terminal mounting portion in which a cutting position is set .