JP4709053B2 - Coaxial cable connector - Google Patents

Description

The present invention relates to a coaxial cable connector that is attached to an end of a coaxial cable and connects the coaxial cable to a plug.

Conventionally, this type of coaxial cable connector is inserted between an insulating member 6 around the core wire 4 of the coaxial cable 2 and a braided conductor 8 around the insulating member 6 as shown in FIG. A cylindrical insertion portion 12 that is possible, a flange portion 14 provided around the insertion portion 12 for positioning the coaxial cable, and provided on the side opposite to the coaxial cable side of the insertion portion 12 so as to be rotatable. After inserting the connector main body 10 composed of a nut portion 16 and the like that can be screwed into an external conductor such as a target plug and the insertion portion 12 of the connector main body 10 into the braided conductor 8 of the coaxial cable 2, the coaxial A configuration is known that includes a fixing ring 20 for crimping and fixing the coaxial cable 2 to the insertion portion 12 of the connector body 10 from the outside of the cable 2 (see, for example, Patent Documents 1 and 2).
When this type of coaxial cable connector is attached to the coaxial cable 2, first, the covering member 9 around the braided conductor 8 is removed from the end of the coaxial cable 2 by a predetermined length La to cover the braided conductor 8. The core wire 4 is cut back so as to be folded back along the edge of the member 9, and then the insulating member 6 inside the braided conductor 8 is cut to the front end side by a predetermined length Lb. The tip of the coaxial cable 2 is processed in such a procedure that is exposed for a predetermined length Lc.
After the coaxial cable 2 is processed, the coaxial cable connector is connected to the connector body so that the fixing ring 20 is inserted into the coaxial cable 2 and then the insulating member 6 is passed through the insertion portion 12 as shown in FIG. 10 is inserted from the front end side of the coaxial cable 2, and then, as shown in FIG. 4C, the fixing ring 20 is moved to the front end side of the coaxial cable 2 and arranged around the insertion portion 12, and the fixing ring 20 is moved. The pair of crimping protrusions 22 and 24 projecting from the cable is fixed to the coaxial cable 2 by a procedure such as crimping with pliers or the like (see FIGS. 4D and 4E).
(For example, see Patent Document 1 and Reference Patent Document 1)

JP-A-11-167963 JP 2005-108666 A

By the way, when the coaxial cable connector is attached to the coaxial cable 2 as described above, the braided conductor 8 is folded back from the edge side of the covering member 9 because the insertion portion 12 of the connector body 10 is connected to the insulating member of the coaxial cable 2 and the braided conductor. This is to facilitate insertion between the braided conductor 8 and the insertion portion 12 (and thus the connector body 10), but when the braided conductor 8 is folded back as described above, the fixing ring When crimping and fixing the coaxial cable 2 at 20, as shown in FIG. 4C, it is necessary to put the braided conductor 8 inside the fixing ring 20, and there is a problem that the crimping operation becomes troublesome.
In other words, the braided conductor 8 is scattered during the folding operation, and the tip of the braided conductor 8 is lifted around the coaxial cable. Therefore, it is difficult to insert the braided conductor inside the fixing ring 20 during the crimping operation. It becomes troublesome.
It is to be noted that the braided conductor needs to be put inside the fixing ring 20 during the crimping operation. If the braided conductor is not put inside the fixing ring 20, not only the appearance is deteriorated, but the braided conductor is not attached. This is because malfunctions may occur due to contact with the wiring and electrical parts.
In addition, it may be possible to cut the protruding braided conductor, but the cutting work is troublesome. In other words, in order to prevent the above problems (the braided conductor comes into contact with other wiring and electrical parts), it is necessary to cut at the base of the braid. It takes time.

Furthermore, since the fixing ring is inserted into the coaxial cable 2 as shown in FIG. 4B after the coaxial cable is processed, the installer needs to carry the fixing ring in advance separately from the coaxial cable connector. Therefore, when the installation work of the coaxial cable connector is performed at a high place such as on the roof, the worker has to pay sufficient attention not to drop the fixing ring while ensuring his own safety. However, if it was dropped, it had to be lowered and picked up again, and there was a problem that the danger associated with raising and lowering the ladder etc. would increase for the worker. In addition, when the worst fixing ring is lost or dropped in a place where it cannot be removed due to this fall, there is a problem that the construction is stopped.
The present invention has been made in view of these problems. In the coaxial cable connector configured to crimp and fix the coaxial cable to the connector body via the fixing ring after the connector body is attached to the tip of the coaxial cable, the crimping is performed. The purpose is to make work easier.
Another purpose is to enable the fixing ring to be inserted safely even in high-altitude installation work.
Another object is to make it possible to obtain a reliable connection state even with a simple insertion work.
Another purpose is that the cost can be reduced.

The invention of claim 1 is provided in a cylindrical insertion portion that can be inserted between an insulating member around a core wire of a coaxial cable and a braided conductor around the insulating member, and the insertion portion is provided around the insertion portion. When inserted into the coaxial cable, the braided conductor of the coaxial cable and a covering member around the braided conductor are brought into contact with each other, and a flange portion that positions the insertion portion with respect to the coaxial cable, and the coaxial of the insertion portion A connector body provided rotatably on the opposite side of the cable side and capable of being screwed to an external conductor to be connected; and after inserting the insertion portion of the connector body into the coaxial cable, In a coaxial cable connector provided with a fixing ring for crimping and fixing the coaxial cable to the insertion portion from the periphery of the coaxial cable, by forming the other end in the central axis direction larger in diameter than the crimping portion. A fixing portion configured to be able to insert and fix the flange portion, and a notch portion for separating the crimping portion and the fixing portion formed on a plane orthogonal to a central axis, When the fixing ring is viewed from the side, at least one of the outer peripheral regions along the direction orthogonal to the central axis in the fixing ring, the plate thickness of the fixing ring from one outer periphery toward the other outer periphery. or is formed over a region that reaches from the region leaving twice the dimension of the thickness in the other periphery, the on notch portion is formed flat, the fixed portion and the crimping portion excluding the notch portion The connecting part is formed thinner than each of the crimping part and the fixing part.

According to the invention of claim 1, a cylindrical insertion portion that can be inserted between the insulating member around the core wire of the coaxial cable and the braided conductor around the insulating member, provided around the insertion portion, the insertion portion Is inserted into the coaxial cable, the braided conductor of the coaxial cable and a covering member around the braided conductor are brought into contact with each other, and a flange portion for positioning the insertion portion with respect to the coaxial cable, and A connector body provided with a connecting means that is rotatably provided on the opposite side of the coaxial cable side and can be screwed to an external conductor to be connected; and after inserting the insertion portion of the connector body into the coaxial cable A fixing ring for crimping and fixing the coaxial cable to the insertion portion from the periphery of the coaxial cable, wherein the fixing ring is connected to the coaxial cable at one end in the center axis direction. A crimping part to be crimped around, a fixing part configured to be able to insert and fix the collar part by forming the other end in the central axis direction larger in diameter than the crimping part, and a plane orthogonal to the central axis A notch for separating the crimping part and the fixing part formed parallel to each other, and the notch is perpendicular to the central axis of the fixing ring when the fixing ring is viewed from the side. Of the outer peripheral region along one direction, the outer periphery reaches at least the outer periphery from the region that has left the plate thickness or twice the plate thickness of the fixing ring from one outer periphery to the other outer periphery. is formed over the region, connecting part of the on notch portion is formed flat, the fixed portion and the crimping portion excluding the notch portion is formed to be thinner than each of said crimping portion and said fixed portion since it is, the coaxial cable of the present invention When attaching the connector to the end of the coaxial cable, after processing the end of the coaxial cable in the same way as before, with the fixing ring fixed to the flange of the connector body, insulate the coaxial cable at the insertion part of the connector body. If the connector body is inserted from the front end side of the coaxial cable so as to pass the member, the braided conductor folded back from the front end side of the coaxial cable is automatically stored in the fixing ring. .
Therefore, according to the coaxial cable connector of the present invention, when the coaxial cable is crimped and fixed to the insertion portion of the connector main body with the fixing ring, the fixing ring is moved so that the braided conductor is inserted inside the fixing ring as in the prior art. It is not necessary, and after attaching the connector body to the end of the coaxial cable, the coaxial cable connector can be fixed to the end of the coaxial cable in an attractive manner by simply crimping the fixing ring fixed to the connector body with pliers or the like.
Therefore, according to the present invention, the crimping operation can be performed very easily.

In addition, even when the coaxial cable connector is attached at a high place such as on the roof, the operator does not need to carry the fixing ring separately from the coaxial cable connector.
Therefore, according to the coaxial cable connector of the present invention, there is no problem that the fixing ring is dropped during the mounting operation as in the prior art, and the operator can concentrate on the mounting work without having to pay attention not to drop the fixing ring. .
Therefore, according to the present invention, the mounting operation can be performed very safely and easily.

Further, the notch can be formed simply by making a cut or the like from the outer peripheral surface on one side of the fixing ring toward the other side. Therefore, it is not necessary to perform special shaping or processing on the tip portion of the cut, and the processing process can be simplified.
Therefore, according to the present invention, even if the fixing ring has the above-described effects, its manufacturing cost can be minimized.

Further, the crimping part and the fixing part can be easily separated at the thin part formed at the connecting part between the crimping part and the fixing part excluding the notch part. Therefore, when the fixing ring is crimped with pliers or the like, the coaxial cable is attached to the connector body without distortion without applying a force that draws the coaxial cable to the connection part between the crimping part and the fixed part. It can be fixed to the end of the cable.
Further, since the entire inner circumference of the crimping portion comes into contact with the outer circumference of the coaxial cable by separating the crimping portion from the fixed portion, it can be firmly fixed to the connector body. In addition, since the force applied to the crimping portion is not applied to the connecting portion between the crimping portion and the fixed portion, the deformation of that portion can be minimized, and this also has a good-looking connection state.
Therefore, according to the present invention, the fixed state is extremely reliable, and a good connection state can be maintained.

Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.
FIG. 1 is a partially cutaway side view showing the configuration of the coaxial cable connector according to the first embodiment. The portion above the alternate long and short dash line along the central axis of the connector represents the cross section of the connector, and the portion below the alternate long and short dashed line. Represents the appearance of the connector. FIG. 2 is a cross-sectional view taken along line XX in FIG. 1, and (a) and (b) show different embodiments of notches. FIG. 3 is a partially broken side view showing the configuration of a coaxial cable connector of a different embodiment. FIG. 4 is an explanatory diagram for explaining the configuration of a conventional coaxial cable connector and the procedure for mounting the coaxial cable connector.

The connector of the present embodiment is for connecting a coaxial cable to an object to be connected such as an F-type plug. As shown in FIG. 1, the connector main body 10 and the conventional connector shown in FIG. , The fixing ring 20.
Similar to the conventional connector shown in FIG. 4, the connector body 10 is provided with a cylindrical insertion portion 12 that can be inserted between the insulating member around the core wire of the coaxial cable and the braided conductor, and around the insertion portion 12. And a connecting portion 16 that is rotatably provided on the opposite side of the insertion portion 12 from the coaxial cable side and that can be screwed to an external conductor to be connected. Yes. In the embodiment of the present invention, as an example of the connecting means 16, a nut portion having an internal thread formed on the inner surface for connection to a connection target is used.
Further, the insertion portion 12 and the flange portion 14 are integrally formed, and the connector body 10 is inserted by inserting the opposite side of the insertion portion 12 from the insertion side into the coaxial cable into the hole at the rear end of the connecting means 16. By assembling the opening edge of the portion 12 outward, the rear end portion of the connecting means 16 is assembled between the crimping portion 13 and the flange portion 14 so as to be rotatable. .

On the other hand, the fixing ring 20 is obtained by processing a metal material such as aluminum. As shown in FIG. 1, a crimping portion 28 crimped around the coaxial cable on one end side in the central axis direction and the other end in the central axis direction. By forming the side with a diameter larger than that of the crimping portion 28, the fixing portion 30 configured to be able to insert and fix the flange portion 14, the crimping portion 28 formed on a plane orthogonal to the central axis, and the The fixing ring 20 is configured to be fixed to the connector body 10 by directly fitting the fixing ring 20 to the outside of the flange portion 14 of the connector body 10.
The notch 32 is a state where the fixing portion 30 of the fixing ring 20 is fixed to the flange portion 14 of the connector main body 10, and a portion having a smaller diameter than the fixing portion 30 (that is, the crimping portion 28) can be easily formed with pliers or the like. This is for separating the fixing portion 30 and the crimping portion 28 so that they can be crimped to each other.
Further, when the coaxial cable 2 is attached to the connector body 10, the connection between the crimping portion 28 and the fixing portion 30 is maintained on at least the outer peripheral surface of the connecting portion between the crimping portion 28 and the fixing portion 30 except for the notch 32. The thinned portion 34 is formed by thinning the connecting portion so that the crimping portion 28 and the fixing portion 30 can be separated when the crimping portion 28 is crimped around the coaxial cable after insertion.

Here, the notch 32 will be described in detail with reference to FIG. The notch 32 in the present invention is formed in such a size that the connecting portion between the crimping portion 28 and the fixing portion 30 is not easily twisted by a generally considered external pressure or vibration during the manufacturing process or product transportation. Has been. That is, the large notch 32 in the present invention is formed from the outer periphery on one side (lower end surface in FIG. 2) of the fixing ring 20 as shown in FIG. It is formed so as to be cut away from the end face) inward in the radial direction, in parallel with a plane orthogonal to the central axis, leaving the plate thickness (t1) of the fixing ring 20.
Further, the area of the deformed portion for crimping in the crimping portion 28 needs to be as large as possible (in other words, the connecting portion between the crimping portion 28 and the fixing portion 30 does not become too wide). The small cutout 32 in the present invention is formed so as to be cut away leaving a dimension (t2) twice the plate thickness of the fixing ring 20, as shown in FIG. The notch 32 is formed to have a size within this range.
Moreover, the thin part 34 is implement | achieved by forming a recessed part at least by the process from an outward direction. The thickness of the thin portion 34 is determined by elastically deforming the thin portion 34 by moving the crimping portion 28 in the rotational direction left and right with respect to the central axis or by moving the crimp portion 28 in the vertical direction in the figure relative to the central axis. You may form so that it may cut away completely, and when crimping | bonding the crimping | compression-bonding part 28, you may comprise so that it can cut | disconnect gradually from the both ends of the thin part 34 toward the circumferential direction inner side of the thin part 34.

When the connector of the present embodiment configured as described above is attached to the end of the coaxial cable, the end of the coaxial cable 2 is processed by the same procedure as that shown in FIG. The insertion portion 12 of the connector body 10 is easily inserted between the insulating member 6 and the braided conductor 8, and then the insulation member 6 of the coaxial cable 2 is passed through the insertion portion 12 of the connector body 10. , The connector body 10 is inserted from the front end side of the cable.
As a result, the braided conductor 8 folded back from the front end side of the coaxial cable 2 is automatically housed inside the fixing ring 20, and thereafter, as in the conventional case, the crimping portion of the fixing ring 20. If the side on which the 28 notch portions 32 are formed is deformed so as to be crushed with pliers or the like and is crimped, the connector can be fixed to the end of the coaxial cable 2 in an attractive manner.
Therefore, according to the connector of this embodiment, the fixing ring 20 is fixed to the connector main body 10 in advance, so that the crimping operation, and hence the mounting operation to the coaxial cable 2 is much more difficult than the conventional one. It can be done easily.

In addition, since it is not necessary to carry the fixing ring 20 separately as in the prior art, there is no risk of dropping the fixing ring 20 especially in high places such as on the roof, and the operator is dedicated to the connector insertion work. I can concentrate on my work.
Therefore, according to the present invention, the insertion work can be performed very safely and easily.

Since the notch 28 is notched so as to leave a plate thickness of the fixing ring or twice the thickness of the fixing ring, the connection portion between the crimping portion and the fixing portion is optimized. Therefore, the connecting portion between the crimping portion and the fixed portion is not easily twisted. In addition, when the coaxial cable is attached, the crimping portion 28 and the fixing portion 30 can be completely separated from each other. Therefore, when the fixing ring is crimped with pliers or the like, the coaxial cable is connected to the crimping portion 28 and the fixing portion 30. The coaxial cable is attached to the connector main body without distortion without being attracted to the portion, and the coaxial cable connector can be fixed to the end of the coaxial cable with good appearance. Further, since the crimping portion 28 is separated from the fixed portion 30, the entire inner circumference of the crimping portion 28 abuts on the periphery of the coaxial cable and is crimped, so that the connector body 10 can be firmly crimped and fixed. In addition, since the force applied to the crimping portion is not applied to the connecting portion between the crimping portion 28 and the fixing portion 30, the portion is not deformed, and this also has a good-looking connection state.
Therefore, according to the present invention, the fixed state is extremely reliable, and a good connection state can be maintained.

Further, in forming the notch portion 28, it is possible only to make a cut by cutting or the like from the outer peripheral surface (from the lower end side in the figure) on one side of the fixing ring 20 to the other side, and the dimension of the fixing ring 20 is maximum. It is formed so as to leave a plate thickness of 20. Therefore, it is not necessary to perform special shaping or processing on the tip portion of the cut, and the processing process can be simplified.
Therefore, according to the present invention, even if the fixing ring 20 has the above-described effects, the manufacturing cost can be minimized.

Further, as shown in FIG. 3, the fixing ring 20 may have a pair of crimping protrusions 22 and 24 protruding from the outer peripheral surface of the annular ring as in the conventional connector shown in FIG. Also, as shown in FIG. 3, if a knurling is formed on the outer peripheral surface of the nut portion 16 of the connector main body 10, it is possible to prevent slipping that occurs when the nut portion 16 is rotated. The nut portion 16 can be easily attached to and detached from the plug or the like using a fingertip or a tool such as a spanner. However, the nut portion 16 shown in FIG. 3 represents a knurl formed along the central axis of the nut portion 16, which is to facilitate the molding of the nut portion 16 with a mold. When forming a knurl by processing, it may be formed in a cross line shape.
Further, according to the embodiment of the present invention, the example of the nut portion in which the internal thread for connecting to the connection target is formed on the inner periphery as the connection means 16 is shown, but the present invention is particularly limited to this embodiment. The present invention is not limited to the above-described embodiment, such as a connecting cylinder that is slidably fixed, or a combination of a female screw and a connecting cylinder, and does not depart from the spirit of the present invention. It is also possible to carry out by appropriately changing the configuration of each part within the range.

It is a partially broken side view showing the structure of the coaxial cable connector of 1st Embodiment. It is the XX sectional view taken on the line in FIG. It is a partially broken side view showing the composition of the coaxial cable connector of a different embodiment. It is explanatory drawing explaining the structure of the conventional coaxial cable connector, and the attachment procedure to a coaxial cable.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Coaxial cable, 4 ... Core wire, 6 ... Insulating member, 8 ... Braided conductor, 9 ... Covering member, 10 ... Connector main body, 12 ... Insertion part, 13 ... Clamping part, 14 ... Gutter part, 16 ... Connection means, 20 ... Adhesive ring, 22, 24 ... Crimping protrusion, 28 ... Crimping part, 30 ... Fixing part, 32 ... Notch part.

Claims (1)

A cylindrical insertion portion that can be inserted between the insulation member around the core wire of the coaxial cable and the braided conductor around the insulation member, provided around the insertion portion, and when the insertion portion is inserted into the coaxial cable, The braided conductor of the coaxial cable and a covering member around the braided conductor are in contact with each other, and a flange portion that positions the insertion portion with respect to the coaxial cable, and the opposite side of the insertion portion to the coaxial cable side A connector main body provided with a connecting means provided rotatably and capable of being screwed onto an external conductor to be connected;
In the coaxial cable connector comprising: a fixing ring for crimping and fixing the coaxial cable to the insertion portion from around the coaxial cable after the insertion portion of the connector body is inserted into the coaxial cable;
The fixing ring can be inserted and fixed to the flange portion by forming a crimping portion to be crimped around the coaxial cable on one end side in the central axis direction and a larger diameter on the other end side in the central axis direction than the crimping portion. A fixing portion configured as follows; and a notch portion for separating the crimping portion and the fixing portion formed on a plane orthogonal to a central axis;
The notch portion, when viewed from the side of the fixing ring, of at least one of the outer peripheral regions along the direction perpendicular to the central axis of the fixing ring from the outer periphery toward the other outer periphery. It is formed from the area of the ring plate thickness to twice the plate thickness to the area reaching the other outer periphery ,
Connecting portions of the on notch portion is formed flat, the fixed portion and the crimping portion excluding the notch portion is characterized in that it is formed to be thinner than each of said crimping portion and said fixed portion Coaxial cable connector.

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