Coaxial cable with plug

A coaxial cable with a Plug comprises a coaxial cable (1) in which an outer conductor (103) is provided around a center conductor (101) with an insulator (102) interposed therebetween and a plug (2) having a center contact (201) electrically connected to the center conductor (101) via a center conductor connecting member (203) and an outer contact (202) electrically connected to the outer conductor (103) via an outer conductor connecting member (204). The center contact (201) and the outer contact (202) rotate about an axis (RX) perpendicular to the axis (201X) of the center contact while maintaining the electrical connection between the center contact (201) and the center conductor (101) and the electrical connection between the outer contact (202) and the outer conductor (103).

TECHNICAL FIELD

The present invention relates to a coaxial cable with a plug, and in particular, it relates to a technology, which is effective when applied to a coaxial cable with a plug connected to a television antenna and a receiver.

BACKGROUND ART

Heretofore, in general, for a data transfer cable, there has been known a coaxial cable provided with an external conductor, for example, such as a netted copper wire allowing an insulator to intervene around a copper core wire (herein after referred to as a central conductor). At this time, the external conductor is cylindrically provided around the central conductor, and has an advantage of shutting off a noise. Hence, the coaxial cable is widely used as a cable of transferring a high frequency signal such as a television signal.

Further, when the coaxial cable is connected to the television antenna and receiver, the coaxial cable with a plug is used, which is provided with a plug having a central contact electrically connected to the central conductor of the coaxial cable and an external contact electrically connected to the external conductor. At this time, in the coaxial cable with a plug, as shown inFIG. 21(a), there are a straight type in which the axial direction201X of the central contact201and the pulling direction1X of the coaxial cable1are in parallel, and as shown inFIG. 21(b), a right angle type in which the axial direction201X of the central contact201and the pulling direction1X of the coaxial cable1make a right angle.

In the case of the coaxial cable with a plug of the straight type, for example, when it is connected to a receiving terminal of the television located at a wall surface at home and the like, a bulging out from the wall surface of the coaxial cable1becomes large. Hence, the bulged portion catches legs and the like, thereby causing a high risk of falling down or the cable being pulled out. Further, in case the receiving terminal of the television is, for example, located at the backside of furniture, a space in consideration of the bulged portion of the coaxial cable1has to be secured since the coaxial cable is severed when applied with an unnatural force and bent.

In the meantime, in the case of the coaxial cable with a plug of the right angle type, since the axial direction201X of the central contact201and the pulling direction1X of the coaxial cable1makes a right angle, when connected to the wall surface, the bulge of the coaxial cable1is small, so that a narrow space behind furniture and the like does not cause hindrance.

However, in such a coaxial cable with a plug, since the positional relation between the axial direction201X of the central contact201and the pulling direction1X of the coaxial cable1is fixed, either of the straight type or the right angle type has to be selected according to an application and a usage place. Hence, for example, due to a housing-moving and a change of design, the situation where, for example, the straight type coaxial cable with a plug becomes difficult to use occurs, the coaxial cable with a plug of the right angle type has to be newly purchased. That is, in the conventional coaxial cable with a plug, there has been a problem that a degree of freedom of adaptability to the application and the usage place is low.

Consequently, an object of the present invention is to provide a coaxial cable with a plug, which has no such a defect of the coaxial cable with a plug and is high in a degree of freedom of adaptability to the application and the usage place.

DISCLOSURE OF THE INVENTION

The present invention provides a coaxial cable with a plug, comprising an external conductor allowing an insulator to intervene around a central conductor, and a plug comprising the central contact electrically connected to the central conductor and the external contact electrically connected to the external conductor wherein the central contact and the external contact rotate with an axis in a direction orthogonal to the axial direction of the central conductor as a rotational axis while maintaining respective electrical connections with the central contact and the central conductor and the external contact and the external conductor. By the rotation of the contact portion and depending on an application and a usage place, for example, the coaxial cable can be used either in state where the axial direction of the central contact and the pulling direction of the cable are in parallel or in state where the axial direction of the central contact and the pulling direction of the cable make a right angle. Further, by rotating while maintaining the electrical connections, regardless of the state where the axial direction of the central contact and the pulling direction of the cable are in parallel or the state where the axial direction of the central contact and the pulling direction of the cable make a right angle, when the contact portion is in a rotatable range, the coaxial cable can be used with a flexible angle. Hence, comparing to the conventional coaxial cable with a plug, a degree of freedom of adaptability to the application and the usage place can be enhanced.

Further, the present invention in a coaxial cable with a plug, comprising an external conductor allowing an insulator to intervene around a central conductor, and a plug comprising the central contact electrically connected to the central conductor and the external contact electrically connected to the external conductor wherein the plug comprises the contact portion, and a main body unit comprising a central conductor connecting member electrically connecting the central contact and the central conductor, an external conductor connecting member connecting the external conduct and the external conductor, and an insulating member electrically insulating the central conductor connecting member and the external conductor connecting member, and the contact portion rotates with a axis in a direction orthogonal to the axial direction of the central conduct as a rotational axis while maintaining electrical connections with the central contact and the central conductor connecting member and electrical connections with the external contact and the external conductor connecting member, respectively. In this way, according to the application and the usage place, the coaxial cable can be used with a flexible angle, for example, in such a state in which the axial direction of the central contact and the pulling direction of the cable are in parallel or a state in which the axial direction of the central contact and the pulling direction of the cable make a right angle or the like. Hence, comparing to the conventional coaxial cable with a plug, a degree of freedom of adaptability to the application and the usage place can be enhanced.

Further, the present invention comprises a pair of protrusions to become a point of support for rotation at one end of the cylindrical conductor portion of the external contact of the coaxial cable with a plug, and moreover, an opening is made from the one protrusion so as to communicate with an inner space of the cylindrical conductor portion, and the central contact has a connecting portion with the central conductor connecting member on the rotational axis, and is bent in a direction to the protrusion provided with the opening portion from the central axis of the external contact. In this way, the coaxial cable can be rotated while maintaining the electrical connections with the central contact and the central conductor connecting member and electrical connections with the external conduct and the external conductor connecting member.

Further, the present invention has the external conductor connecting member of the coaxial cable with a plug comprises a plurality of conductor parts, and has the protrusion of the external contact nipped and support-fixed by the plurality of conductor parts. Further, at this time, the insulating member of the main body unit of the plug is provided in such a way that the central conductor connecting member and the external conductor connection member maintain a coaxial structure, so that the change of the impedance of the signal to be transferred can be avoided.

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be described more in detail below with reference to the accompanying drawings.

In all the drawings to explain the embodiments, those parts having the same functions will be attached with the same reference numerals, and the description thereof will be omitted.

The present invention in a coaxial cable with a plug, comprising an external conductor allowing an insulator to intervene around a central conductor, and a plug comprising the central contact electrically connected to the central conductor and the external contact electrically connected to the external conductor is such that the central contact and the external contact rotate with an axis in a direction orthogonal to the axial direction of the central conductor as a rotational axis while maintaining respective electrical connections with the central contact and the central conductor connecting member and the external contact and the external conductor connecting member.

First Embodiment

FIG. 1is a top view showing an external appearance of a coaxial cable with a plug of a first embodiment according to the present invention. Further,FIG. 2is a sectional view explaining an internal structure of the coaxial cable with a plug of the first embodiment, and is a view seen from the same direction asFIG. 1. Further,FIG. 3is a sectional view explaining the internal structure of the coaxial cable with a plug of the first embodiment, and is a view seen from the right side of the sheet surface ofFIG. 1.

The coaxial cable with a plug of the first embodiment, as shown inFIG. 1, comprises a coaxial cable1provided with an external conductor (netted conductor)103allowing the insulator102to intervene around the central conductor101, and the plug2provided with the central contact201and the external contact202. At this time, the plug2is of a push-on system, and the central contact201and the external contact202are connecting terminal portions, which are plugged into other coaxial cables or a receptacle jack provided at home (room) and the wall side face and the like of electronic equipment.

Further, at this time, the central contact201and the central conductor101, as shown inFIG. 2, are electrically connected by the external conductor connecting member203provided inside the plug2. Further, the external contact202and the external conductor103, as shown inFIG. 2are also electrically connected by the external conductor connecting member204inside the plug2.

Further, the central contact201, as shown inFIG. 2, is fixed by the first insulating member205and the injection ring206so as to maintain a relative position with the external contact202. Further, in the inside of a cylindrical conductor portion202A of the external contact202, there is provided the inner spring207to make a favorable contact with the receptacle jack.

Further, the central conductor connecting member203and the external conductor connecting member204are provided so as to maintain a coaxial structure by allowing the second insulating member208to intervene.

Further, the central contact201, as shown inFIG. 2, is bent in such a way that a connecting portion with the central conductor connecting member203is superposed with an axis (hereinafter referred to as a second axis) RX in a direction orthogonal to a main axis (hereinafter referred to as a first axis)201X of the central contact201. Further, the central contact201and the central conductor connecting member203are mechanically in a contacted state, and the central contact201is allowed to make a rotational movement with the second axis RX as a rotational axis.

Further, the external contact202, as shown inFIG. 2, is provided with a protrusion202B which becomes a point of support for rotation at one end of the cylindrical conductor portion202A, in other words, at the connecting portion with the external conductor connecting member204. At this time, the protrusion202B, as shown inFIG. 3, is a disk-shaped protrusion such that a protrusion202can make a rotational movement with the second axis RX as a rotational axis, and the external conductor connecting member204supports the protrusion202B of the external contact202to nip it, and is mechanically in a contacted state with it.

Further, outside of the external conductor connecting member204, there is provided a packing insulation cover209.

FIGS. 4 to 11are schematic illustrations explaining an assembly method of the coaxial cable with a plug of the first embodiment.

When the coaxial cable with a plug of the first embodiment is to be assembled, first, for example, the external contact202as shown inFIGS. 4(a) and4(b) is prepared. The external contact202provides a rotational point of support comprising a pair of protrusions202B in which the axis RX (second axis) becomes a rotational axis in a direction orthogonal to the central axis of the cylindrical conductor portion202A at one end of the cylindrical conductor portion202A. Further, at this time, as shown inFIG. 4(b), an opening is made from the one protrusion202B so as to communicate with an inner space of the cylindrical conductor portion202A.

Next, as shown inFIG. 5, the L-shaped central contact201is nipped by the first insulating member205of a half-divided structure, and is inserted into the cylindrical conductor portion202A of the external contact. At this time, a portion connected to the central conductor connecting portion of the central contact201is pointed at an opening direction of a protrusion201B, and the injection ring206in a state superposed with the second axial RX is pushed, thereby fixing the first insulating member205.

Next, for example, as shown inFIG. 6, the inner spring207is inserted into the cylindrical conductor portion202A of the external contact.

Further, while the central contact201is inserted into the external contact202and fixed, as shown inFIG. 7, the central conductor101and the central conductor connecting member203of the coaxial cable1are connected.

At this time, first, as shown inFIG. 7, the coaxial cable1is passed through a caulking ring210, and a retaining ring211is inserted between the external conductor103and the insulator102. The caulking ring210is a ring, which is caulked when the coaxial cable1is nipped by the external conductor connecting member204, and assures the electrical connection with the external conductor103of the coaxial cable1and the external conductor connecting member204. Further, the retaining rink211is a ring, which prevents the insulator102of the coaxial cable1, when caulked by the caulking ring210, from deforming to change in the impedance.

Further, at this time, the central conductor connecting member203, with its connecting portion with the central conductor101of the coaxial cable1gutter-shaped, as shown inFIG. 7, puts on and solders the central conductor101of the coaxial cable1. Further, the connecting portion of the central contact201of the central conductor connecting member203is given a slot so as to be spring-shaped.

Further, the central conductor101of the coaxial cable1and the central conductor connecting member203are connected, and after that, as shown inFIG. 7, the central conductor101and the central conductor connecting member203are nipped by the second insulating member208of the half-divided structure.

Next, as shown inFIG. 8, the central conductor connecting member203which connects the coaxial cable1and the central contact201which is inserted and fixed to the external contact202are connected. At this time, the central contact201is not given a mechanical connection such as soldering so as to allow it to make a rotational movement. Further, at this time, the second insulating member208which nips the central conductor connecting member203is inserted in the opening provided for the protrusion202B of the external contact202, so that the second insulating member208and the first insulating member205are adhered.

Next, as shown inFIG. 9, by the external conductor connecting members204A and204B which are divided into two portions, the protrusion202B of the external contact202, the central conductor connecting member203(second insulating member208), and the external conductor103of the coaxial cable1are nipped and fixed by screws and the like. After that, by the caulking ring210, the connecting portion of the external conductor connecting members204A and204B and the external conductor103of the coaxial cable1are fixed.

Further, at this time, as shown inFIG. 10, the first external conductor connecting member204A is provided with grooves, and the second external conductor connecting member204B is provided with protrusions corresponding to the grooves of the first external conductor connecting member204A. By providing the grooves and the protrusions, when the first external conductor connecting member204A and the second external connecting member204B are fixed, as shown inFIGS. 11(a) and11(b), a gap is hard to arise between the first external conductor connecting member204A and the second external conductor connecting member204B, the whole peripheries of the insulator102of the coaxial cable and the second insulating member208can be shielded by the external conductor connection members204A and204B. Hence, a leakage of signal from the central conductor101of the coaxial cable1and the central conductor connecting member203can be avoided.

Finally, when the packing insulating cover209is attached to the outside of the external conductor connecting members204A and204B, the coaxial cable with a plug as shown inFIG. 1can be acquired.

FIG. 12is a schematic illustration explaining an operational effect of the coaxial cable with a plug of the first embodiment, andFIGS. 12(a) and12(b) are side views showing a using state of the coaxial cable with a plug.

In the coaxial cable with a plug of the first embodiment, the external contact202is provided with the protrusion202B at the connecting portion with the external conductor connecting members204A and204B, and the central contact201and the external contact202can be rotated while maintaining the electrical connections with the central contact201and the central conductor connecting member203and the electrical connections with the external contact202and the external conductor connecting members204A and204B. Hence, when the coaxial cable with a plug is connected to a receptacle jack (F type jack, receptacle jack) installed at a wall face and the like at home, the angle of the coaxial cable pulled out from the plug can be freely changed within a plane. That is, for example, as shown inFIG. 12(a), the coaxial cable can be used in state where the main axial direction (first axis)201X of the central contact201and the direction (third axis)1X in which the coaxial cable attached with the plug is pulled out are in parallel, and as shown inFIG. 12(b), it can be used in state where the first axis201X and the third axis1X are orthogonal to each other.

As described above, according to the coaxial cable with a plug of the first embodiment, the central contact201and the external contact202of the plug rotate while maintaining the electrical contacts with the central conductor101and the external conductor103of the coaxial cable1, so that the angle of the main axis201X of the central contact201and the pulled out direction1X of the coaxial cable1can be adjusted according to an application and a usage place. Hence, for example, the proper use of the conventional straight type and the right angle type can be made by one piece of the coaxial cable with a plug of the first embodiment, and a degree of freedom of adaptability to the application and the usage place can be enhanced.

Second Embodiment

FIGS. 13 to 16are schematic illustrations showing a general structure of a coaxial cable with a plug of a second embodiment according to the present invention, and are oblique views for explaining an assembly procedure of the coaxial cable with a plug.

The external appearance of the coaxial cable with a plug of the second embodiment is the same as the coaxial cable with a plug of the first embodiment, and as shown inFIG. 1, a plug2comprising the central contact201and the external contact202is attached to the end portion of the coaxial cable1. Further, the central contact201and the external contact202, similarly to the coaxial cable with a plug of the first embodiment, can be rotated with the second axis RX orthogonal to the first axis201X as a rotational axis.

The assembly method of the coaxial cable with a plug of the second embodiment will be described below along withFIGS. 13 to 16. The same portions as the first embodiment will be described by using each drawing used in the first embodiment.

First, as shown inFIGS. 4 and 5, along with the procedure described in the first embodiment, the L-shaped central contact201nipped by the first insulating member205is inserted into the external contact202having a protrusion202B which becomes a point of support for rotation, and is fixed by an injection ring206, and a contact portion into which an inner spring (not shown) is inserted is prepared.

Next, as shown inFIG. 13, a central connecting member203is nipped by a second insulating member208of a half-divided structure, and the central conductor connecting member203and the central contact201are connected. At this time, as described in the first embodiment, a connecting portion with the central contact201of the central conductor connecting member203is provided with a slot so that it becomes spring-shaped. Further, the connecting portion of the central conductor of the coaxial cable of the central conductor connecting member203is also provided with a slot so that it becomes spring-shaped.

Next, as shown inFIG. 14, the contact portion connected to the central conductor connecting member203is fitted into a first external conductor connecting member204A in which grooves corresponding to the external shapes of the protrusion202B of the external contact202and the central conductor connecting member203(second insulating member208) are provided. At this time, the portion to which the coaxial cable1of the first external conductor connecting member204A is attached, as shown inFIG. 14, is provided with a cable fixing pipe204C.

Next, as shown inFIG. 15, the coaxial cable1is inserted from the pipe204C of the first external conductor connecting member204A, and a central conductor101of the coaxial cable1and the central conductor connecting member203are connected. At this time, the pipe204C of the first external conductor connecting member is inserted between an insulator102which insulates the central conductor101and an external conductor103of the coaxial cable1and the external conductor103. Further, at this time, the insulator102of the coaxial cable1and the second insulating member208are connected so as to be adhered.

Next, as shown inFIG. 16, the first external conductor connecting member204A is covered with a second external conductor connecting member204B, and is fixed by screws and the like. At this time, since the central conductor101of the coaxial cable1and the central conductor connecting member are not connected by soldering and the like, there is a risk of the coaxial cable1being pulled out. Hence, the portion of the pipe204C in which the coaxial cable1to be connected is passed through is caulked by a caulking ring210, so that the coaxial cable1is fixed so as not to be pulled out.

As described above, according to the coaxial cable with a plug of the second embodiment, similarly to the coaxial cable with a plug of the first embodiment, can allow the central contact and the external contact to rotate. Hence, for example, the proper use of the conventional straight type and the right angle type can be made by one piece of the coaxial cable with a plug of the second embodiment, and a degree of freedom of adaptability to the application and the usage place can be enhanced.

Third Embodiment

FIGS. 17 to 20are schematic illustration showing a general structure of a coaxial cable with a plug of a third embodiment according to the present invention, and are oblique views for explaining an assembly procedure of the coaxial cable with a plug.

The external appearance of the coaxial cable with a plug of the third embodiment is also the same as the coaxial cable with a plug of the first embodiment, and as shown inFIG. 1, the plug2comprising the central contact201and the external contact202is attached to the end portion of the coaxial cable1. Further, the central contact201and the external contact202, similarly to the coaxial cable with a plug of the first embodiment, can be also rotated with the second axis RX orthogonal to the fist axis201X as a rotational axis.

The assembly method of the coaxial cable with a plug of the third embodiment will be described below along withFIGS. 17 to 20. Those parts similar to the first embodiment will be described by using each drawing showing in the first embodiment.

First, as shown inFIGS. 4 and 5, along with the procedure shown in the first embodiment, the L-shaped central contact201nipped by the first insulating member205is inserted into the external contact202having a protrusion202B which becomes a point of support for rotation, and is fixed by an injection ring206, and a contact portion into which an inner spring207is inserted is prepared.

Next, as shown inFIG. 17, a central connecting member203is nipped by a second insulating member208of a half-divided structure, and the central conductor connecting member203and the central contact201are connected. At this time, similarly to the coaxial cable with a plug of the second embodiment, a connecting portion with the central contact201of the central conductor connecting member203is provided with a slot so that it becomes spring-shaped. Further, the connecting portion with the central conductor of the coaxial cable of the central conductor connecting member203is also provided with a slot so that it becomes spring-shaped.

Next, as shown inFIG. 18, the contact portion connecting the central conductor connecting member203is fitted into a first external conductor connecting member204A provided with grooves corresponding to protrusions202B of the external contact202and the central conductor connecting member203(second insulating member208).

At this time, in the coaxial cable with a plug of the third embodiment, different from the cases of the first and second embodiments, the first external conductor connecting member204A is divided at a plane parallel with the flat surface including the first axis201X and the second axis (rotational axis) RX. Further, at this time, the portion, to which the coaxial cable1of the first external conductor connecting member204A is attached, is provided with a cable fixing pipe204C as shown inFIG. 18.

Next, as shown inFIG. 19, the coaxial cable1is inserted from the pipe204C of the first external conductor connecting member204A, and a central conductor101of the coaxial cable1and the central conductor connecting member203are connected. At this time, the pipe204C of the first external conductor connecting member204A is inserted between an insulator102, which insulates the central conductor101and the external conductor103of the coaxial cable1, and the external conductor103.

Next, as shown inFIG. 20, the first external conductor connecting member204A is covered with a second external conductor connecting member204B, and is fixed by screws and the like. At this time, since the central conductor101of the coaxial cable1and the central conductor connecting member203are not connected by soldering and the like, there is a risk of the coaxial cable1being pulled out. Hence, the connecting portion with the coaxial cable1and the pipe204C of the first external conductor connecting member is caulked and fixed by the caulking ring210.

As described above, according to the coaxial cable with a plug of the third embodiment, similarly to the coaxial cable with a plug of the first embodiment, the central contact and the external contact can be rotated. Hence, for example, the proper use of the conventional straight type and the right angle type can be made by one piece of the coaxial cable with a plug of the third embodiment, and a degree of freedom of adaptability to the application and the usage place can be enhanced.

INDUSTRIAL APPLICABILITY

As described above, the coaxial cable with a plug according to the present invention is useful as a cable which connects a television antenna or a television terminal of the wall face of a building and a television receiver, and is suitable to be used particularly in a place where surrounding circumstances of the terminal which connects the cable tend to change and a narrow place.