JP2010226791A - Terminal structure of coaxial cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the axial length of a terminal structure of a coaxial cable and facilitate terminal processing of the coaxial cable. <P>SOLUTION: The terminal structure is of the coaxial cable 1 comprised of an inner conductor 2, an inner insulation layer 3, an outer conductor 4, and an outer insulation layer 5. In the coaxial cable 1, there are formed a first cutting portion 6 that is extended in the circumferential direction and cuts at least the outer insulation layer 5 to divide the outer insulation layer 5 in the axial direction and a second cutting portion 7 that is provided closer to the terminal end than the first cutting portion 6 in the axial direction and extended throughout the circumference, and cuts the outer insulation layer 5 and the outer conductor 4 to divide the outer insulation layer 5 and the outer conductor 4 in the axial direction. The coaxial cable 1 is provided on its terminal face with a connecting terminal 9 comprised of a conductor electrically connected to the inner conductor 2 and the outer conductor 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a terminal structure of a coaxial cable.

In recent years, cases of using coaxial cables as wiring materials are increasing in information communication devices, digital cameras, personal computers, medical devices, and the like that process large volumes of data at high speed.
As a schematic configuration of a coaxial cable used for transmission of a general communication signal, an inner conductor for transmitting a communication signal is disposed at the center of the cable, and an inner insulating layer made of a dielectric is coated on the outer peripheral surface of the inner conductor. The outer peripheral surface of the inner insulating layer is covered with an outer conductor for preventing the occurrence of electromagnetic noise disturbance, and the outer peripheral surface of the outer conductor is covered with an outer insulating layer made of a dielectric. In such a coaxial cable, when it is electrically connected to an electric circuit board or the like, it is necessary to end-process the coaxial cable so that it can be connected to a joint portion of a connection partner.

  Conventionally, the end treatment method of a coaxial cable has been as follows. Using a tool or the like, the inner insulating layer covering the end of the inner conductor, the outer conductor, and the outer insulating layer are removed by the length for electrical connection, and the inner conductor is exposed. In addition, there is a method of removing the outer insulating layer and exposing the end portion of the outer conductor. Coaxial cable terminated in this way can be connected by welding the end of the exposed inner conductor to the joint of the connection partner with a conductor such as solder or by adhering it to the contact terminal with a conductive adhesive. Electrically connected to the other party. Furthermore, in the coaxial cable, in order to prevent the occurrence of electromagnetic noise disturbance by setting the outer conductor to the ground potential, the exposed end of the outer conductor is welded to the ground conductor connected to the earth or the like with solder or the like. Glue with adhesive.

  In addition, as a terminal processing method for coaxial cables, conventionally, for example, as shown in Patent Document 1 below, a plurality of coaxial cables are arranged in a line to form a flat cable, and the outer conductors of the plurality of coaxial cables are grounded together. The method of making it known is known. In this method, the ends of a plurality of coaxial cables are arranged in parallel. In addition, at the end of each coaxial cable, the length of the inner conductor is electrically exposed, and the end of the inner insulating layer is exposed for a length that prevents the exposed inner conductor and the outer conductor from conducting. Further, the end portion of the outer conductor is exposed with a sufficient length. Then, the exposed end portions of the external conductors are electrically connected to each other through a ground bar made of a conductor and grounded through the ground bar, or each external conductor is twisted to form a single stranded wire. It is grounded through this stranded wire.

  Moreover, as a terminal processing method of a coaxial cable, the method as shown, for example in the following patent document 2 is proposed. In this method, first, the end portion of the outer conductor is removed to expose the end portion of the outer conductor. Next, the outer insulating layer is cut at a predetermined position to separate a part of the end of the outer insulating layer. Next, the separated body of the outer insulating layer is slightly moved along the outer peripheral surface of the outer conductor toward the end of the coaxial cable, and the separated body is separated from the main body of the outer insulating layer. Thereafter, the separated body and the outer conductor are joined with solder or the like. Next, the above-described separator is moved to the terminal opposite side (external insulating layer body side). As a result, the end portion of the outer conductor also moves together with the separator, and a part of the outer conductor is loosened in a bowl shape toward the outside in the radial direction between the separator and the outer insulating layer main body. Next, the outer conductor slackened in a bowl shape is cut over the entire circumference. Thereafter, the separator is moved to the end side, and the end portion of the outer conductor is extracted from the inner insulating layer together with the separator. Thereby, the edge part of an internal insulating layer is exposed. Thereafter, the exposed inner insulating layer is cut at a predetermined position, the end of the inner insulating layer is extracted from the inner conductor, and the inner conductor is exposed by the length for electrical connection.

JP 2006-196418 A JP 2005-312093 A

However, in the above-described conventional technology, the terminal structure of the coaxial cable after the terminal processing is configured such that the exposed inner conductor protrudes from the tip of the exposed cylindrical outer conductor, and is connected to the joint of the connection partner. A fixed connection part (exposed end of the inner conductor) and a ground part connected to ground (exposed end of the outer conductor) are connected in series in the axial direction of the coaxial cable. It has become. Therefore, the axial direction length of the terminal structure of a coaxial cable becomes long, and there exists a problem that size reduction and thickness reduction of a communication apparatus, an electrical apparatus, etc. are prevented.
Also, in an ultra-thin coaxial cable, the inner conductor is very thin and flexible, so it is difficult to handle the inner conductor when fixing the exposed inner conductor to the joint of the connection partner. Thin and easy to break. Therefore, it is difficult to perform terminal processing on an extremely fine coaxial cable, and there is a problem that a high skill or a dedicated machine is required.
Furthermore, when terminating an extremely fine coaxial cable, there is a problem that a special dedicated tool for removing the outer insulating layer, the outer conductor, and the terminal portion of the inner insulating layer is necessary.

  The present invention takes the above-described conventional problems into consideration, can reduce the axial length of the terminal structure of the coaxial cable, and can also process the terminal processing of the coaxial cable without using a special dedicated tool or the like. It aims at providing the terminal structure of the coaxial cable which can perform easily.

  In the terminal structure of the coaxial cable according to the present invention, the outer peripheral surface of the inner conductor is covered with the inner insulating layer, the outer peripheral surface of the inner insulating layer is covered with the outer conductor, and the outer peripheral surface of the outer conductor is covered with the outer insulating layer. In the coaxial cable terminal structure, the coaxial cable extends in the circumferential direction of the coaxial cable and cuts at least the outer insulating layer to divide the outer insulating layer in the axial direction of the coaxial cable. A first cut portion to be disposed, and an outer end of the coaxial cable that is disposed on a distal end side in the axial direction of the coaxial cable and extends over the entire circumference in the circumferential direction of the coaxial cable. And a second cut portion that cuts the outer conductor and divides the outer insulating layer and the outer conductor in the axial direction of the coaxial cable, respectively, and is formed on the end surface of the coaxial cable. Wherein each of the inner conductor and the outer conductor connecting terminal made of a conductive material which is electrically conductive and is characterized in that is provided.

With such a feature, the outer peripheral surface of the coaxial cable is cut with a blade or the like to form the first and second cut portions, and the connection terminal is formed with solder or the like on the end surface of the coaxial cable. A cable terminal structure is formed. Therefore, it is not necessary to remove the end portions of the outer insulating layer, the outer conductor, and the inner insulating layer, and the end portions of the inner conductor are covered with the inner insulating layer, the outer conductor, and the outer insulating layer.
Further, when the above-described coaxial cable is connected to the connection partner, the connection terminal provided on the end face of the coaxial cable is brought into contact with the joint of the connection partner. At this time, the connection terminal described above is electrically connected to the inner conductor and the outer conductor, respectively, and thus has a larger cross-sectional area than at least the inner conductor. In addition, since the outer conductor is divided by the second cutting portion, the outer conductors on both sides in the axial direction across the second cutting portion are electrically insulated from each other. Therefore, even if the end portion of the outer conductor is electrically connected to the joint portion of the connection partner via the connection terminal, the outer conductor on the center side in the axial direction (opposite side of the end side) than the second cut portion. The intermediate portion is less susceptible to electrical influence from the connection terminal.
Furthermore, it is possible to connect a ground (ground), a bias, or the like from the first cutting portion formed on the axial center side to the second cutting portion to the intermediate portion of the external conductor.

In the terminal structure of the coaxial cable according to the present invention, it is preferable that a connection portion made of a conductor that is electrically connected to the outer conductor is provided in the first cut portion.
As a result, the ground wire and the connection line to the bias are connected to the connection portion, so that the intermediate portion of the outer conductor is electrically connected to the ground and the bias.

Moreover, it is preferable that the terminal structure of the coaxial cable which concerns on this invention is forming the coaxial cable terminal part of the terminal side rather than the said 2nd cutting part.
Thereby, the shape of the terminal portion of the coaxial cable is formed in accordance with the connection partner, and the end portion of the formed coaxial cable is fitted to the connection partner.

According to the terminal structure of the coaxial cable according to the present invention, it is not necessary to remove the end portions of the outer insulating layer, the outer conductor, and the inner insulating layer, so that the end processing of the coaxial cable can be easily performed without using a special dedicated tool or the like. Can be done. Also, since the coaxial cable is connected to the other end with the end of the inner conductor covered with the inner insulating layer, the outer conductor, or the outer insulating layer, the handling at the time of connection is easy. Is difficult to break. Thereby, the terminal processing of the coaxial cable can be easily performed, and the quality can be stabilized.
Furthermore, according to the terminal structure of the coaxial cable according to the present invention, the axial length of the terminal structure of the coaxial cable can be shortened, and it is possible to cope with the downsizing and thinning of communication equipment and electrical equipment. .

It is a fracture perspective view of a coaxial cable for explaining an embodiment of the invention. It is sectional drawing of the coaxial cable for demonstrating the 1st Embodiment of this invention. It is sectional drawing of the coaxial cable for demonstrating the 1st Embodiment of this invention. It is sectional drawing of the coaxial cable for demonstrating the 1st Embodiment of this invention. It is sectional drawing of the coaxial cable for demonstrating the 1st Embodiment of this invention. It is sectional drawing of the coaxial cable for demonstrating the 2nd Embodiment of this invention. It is sectional drawing of the coaxial cable for demonstrating the 2nd Embodiment of this invention. It is a fracture | rupture perspective view of the coaxial cable for demonstrating the 3rd Embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a terminal structure of a coaxial cable according to the present invention will be described with reference to the drawings.

  First, the configuration of the coaxial cable 1 in the present embodiment will be described with reference to FIG. FIG. 1 is a cutaway perspective view of the coaxial cable 1.

  As shown in FIG. 1, in the coaxial cable 1, the outer peripheral surface of the inner conductor 2 is covered with an inner insulating layer 3, the outer peripheral surface of the inner insulating layer 3 is covered with an outer conductor 4, and the outer peripheral surface of the outer conductor 4 is external. The cable has a configuration covered with an insulating layer 5. The inner conductor 2 is a core wire made of a conductor for transmitting an electrical signal. The inner insulating layer 3 is a cylindrical body that covers the outer peripheral surface of the inner conductor 2 over the entire circumference. The outer conductor 4 is a barrier layer for preventing the occurrence of electromagnetic noise disturbance, and is a conductor made of, for example, a braided wire woven with a copper wire. The outer insulating layer 5 is a sheath tube (protective coating) that covers the outer peripheral surface of the outer conductor 4 over the entire circumference. The inner insulating layer 3 and the outer insulating layer 5 described above are made of a dielectric material such as a fluororesin having flexibility and stretchability. The inner conductor 2, the inner insulating layer 3, the outer conductor 4, and the outer insulating layer 5 described above are relatively movable in the direction of the axis O. That is, the inner insulating layer 3 can slide in the direction of the axis O along the outer peripheral surface of the inner conductor 2 and the inner peripheral surface of the outer conductor 4, and the outer insulating layer 5 can move along the axis O along the outer peripheral surface of the outer conductor 4. It can slide in the direction.

  Next, the terminal structure of the coaxial cable 1 having the above configuration will be described.

[First Embodiment]
First, a first embodiment of the terminal structure of the coaxial cable 1 will be described with reference to FIGS. 2 to 5 are cross-sectional views in which the end portion of the coaxial cable 1 is cut in the direction of the axis O of the coaxial cable 1.
Note that the left side in FIG. 2 is the end side of the coaxial cable 1 in the direction of the axis O, and is simply referred to as “end side” hereinafter. Further, the right side in FIG. 2, that is, the side opposite to the above-described end side is the center side in the direction of the axis O of the coaxial cable 1, and is simply referred to as “center side” hereinafter. In the following description of the embodiment, the direction of the axis O is referred to as “axial direction”, and the radial direction of the coaxial cable 1, that is, the direction orthogonal to the axis O is referred to as “radial direction”. The direction, that is, the direction around the axis O is referred to as “circumferential direction”.

First, the configuration of the terminal structure of the coaxial cable 1 will be described.
As shown in FIG. 2, first and second cut portions 6 and 7 extending in the circumferential direction are formed at the end portion of the coaxial cable 1 with an interval in the axial direction. The first and second cut portions 6 and 7 are cuts that cut the outer conductor 4 and the outer insulating layer 5 to divide the outer insulating layer 5 in the axial direction. In other words, the first and second cut portions 6 and 7 have a depth (a length in the radial direction) from the outer peripheral surface of the outer insulating layer 5 to the inner peripheral surface of the outer conductor 4 (the outer peripheral surface of the inner insulating layer 3). Each is a cut. Further, the first and second cutting portions 6 and 7 are each extended over the entire circumference of the coaxial cable 1 and have an annular shape centering on the axis O. Further, the second cutting part 7 is disposed on the axial end side of the first cutting part 6.

The end portion of the outer conductor 4 is divided into a plurality of parts by the first cutting portion 6 and the second cutting portion 7 described above.
More specifically, the outer conductor 4 includes a terminal split conductor 40 (corresponding to an end portion of the outer conductor of the present invention), an intermediate split conductor 41, and an outer conductor main body 42. The members are arranged in the order of the end split conductor 40, the intermediate split conductor 41, and the outer conductor main body 42 in the order from the end side in the axial direction. A gap is formed between the end face 40a on the center side of the terminal split conductor 40 and the end face 41a on the end side of the intermediate split conductor 41, and the terminal split conductor 40 and the intermediate split conductor 41 are electrically insulated. Has been. Further, a conductor (a ground connection portion 8 to be described later) is interposed between the end face 41b on the center side of the intermediate divided conductor 41 and the end face 42a on the end side of the outer conductor main body 42. The conductor main body 42 is electrically connected.

  Similarly to the outer conductor 4, the end portion of the outer insulating layer 5 is divided into a plurality of portions by the first cut portion 6 and the second cut portion 7 described above. That is, the outer insulating layer 5 is provided with a terminal split insulator 50, an intermediate split insulator 51, and an outer insulating layer main body 52. These members are connected to the terminal split insulator 50, The intermediate divided insulator 51 and the outer insulating layer main body 52 are arranged in order in the axial direction with an interval therebetween.

  On the other hand, a slack portion 30 bulging outward in the radial direction is formed on the inner insulating layer 3 at a portion located inside the second cut portion 7 over the entire circumference. The slack portion 30 is a portion obtained by expanding and deforming a part of the inner insulating layer 3, is formed inside the second cut portion 7, and is formed between the terminal split conductor 40 and the intermediate split conductor 41. Is intervened.

  The first cut portion 6 has a ground connection portion 8 (corresponding to a connection portion in the present invention) made of a conductor that is electrically connected to the intermediate divided conductor 41 and the outer conductor main body 42 described above. Is provided. The ground connection portion 8 is made of a conductive adhesive filled in the first cutting portion 6, and projects outward in the radial direction of the outer peripheral surface of the outer insulating layer 5. The ground connection portion 8 is a terminal for grounding to a ground or the like, and a ground wire or the like (not shown) is connected to the ground connection portion 8.

  The terminal surface (tip surface) of the coaxial cable 1 is provided with connection terminals 9 that are electrically connected to the inner conductor 2 and the outer conductor 4, respectively. The conductor 2 is electrically connected. More specifically, the leading end portion of the inner conductor 2 and the leading end portion of the outer conductor 4 protrude from the end surfaces of the inner insulating layer 3 and the outer insulating layer 5, respectively. A connection terminal 9 made of a conductor such as solder is joined to the tip. The connection terminal 9 is filled between the outer peripheral surface of the distal end portion of the inner conductor 2 and the inner peripheral surface of the distal end portion of the outer conductor 4 and covers the distal end surfaces of the inner conductor 2 and the outer conductor 4. The connection terminal 9 is formed in a shape that matches the shape of the joint surface of a connection partner (not shown). For example, when the joint surface of the connection partner is a flat surface, the front end surface (joint surface 9a) of the connection terminal 9 is formed perpendicular to the axis O. 2 is formed so that the outer shape of the joint surface 9a is substantially the same as the outer shape of the external conductor 4 in a sectional view, and the outer peripheral surface of the connection terminal 9 is substantially the same as the outer peripheral surface of the external conductor 4. It is formed flush.

  Next, a method for forming the terminal structure of the coaxial cable 1 described above, that is, a terminal processing method for the coaxial cable 1 will be described.

  First, as shown in FIG. 3, the outer insulating layer 5 of the coaxial cable 1 is moved to the center side along the axial direction relative to the outer conductor 4. As a result, the outer conductor 4, the inner conductor 2, and the inner insulating layer 3 protrude from the end surface of the outer insulating layer 5, and the end portion of the outer conductor 4 is exposed.

  Next, as shown in FIG. 4, at the end portion of the coaxial cable 1, the first cut portion 6 and the second cut portion 7 described above are formed by making cuts at two locations at intervals in the axial direction. As a result, the end portion of the outer conductor 4 is divided into the terminal divided conductor 40, the intermediate divided conductor 41, and the outer conductor main body 42, and the terminal divided conductor 40 and the intermediate divided conductor 41 are electrically insulated. . Further, the end of the outer insulating layer 5 is divided into a terminal split insulator 50, an intermediate split insulator 51, and an external insulating layer body 52.

  Next, as shown in FIG. 5, the end portion of the inner insulating layer 3 is moved to the center side, and a slack portion 30 is formed in a portion of the inner insulating layer 3 located inside the second cut portion 7. As a result, the end face of the inner insulating layer 3 is brought closer to the center, the inner conductor 2 and the outer conductor 4 are projected from the end face of the inner insulating layer 3, and the end portion of the inner conductor 2 is exposed. Further, since the slack portion 30 described above is interposed between the terminal divided conductor 40 and the intermediate divided conductor 41, insulation between the terminal divided conductor 40 and the intermediate divided conductor 41 is ensured.

Next, as shown in FIG. 2, a conductor such as solder is joined to each terminal portion of the inner conductor 2 and the outer conductor 4 protruding from the respective end surfaces of the inner insulating layer 3 and the outer insulating layer 5, thereby connecting terminals. 9 is formed. Further, the ground connection portion 8 is formed by filling the first cutting portion 6 with a conductive adhesive.
As described above, the terminal processing of the coaxial cable 1 is completed, and the terminal structure of the coaxial cable 1 is formed.
Then, the coaxial cable 1 for which the terminal processing has been completed electrically connects the coaxial cable 1 and the connection partner (not shown) by bringing the joint surface 9a of the connection terminal 9 into contact with the joint of the connection partner (not shown). To do. Further, the outer conductor 4 of the coaxial cable 1 is grounded by joining an unillustrated ground wire or the like to the ground connection portion 8.

  According to the terminal structure of the coaxial cable having the above-described configuration, it is not necessary to remove the end portions of the inner insulating layer 3, the outer conductor 4, and the outer insulating layer 5, so that the coaxial cable 1 can be used without using a special dedicated tool or the like. Terminal processing can be easily performed.

  Further, it is not necessary to expose the end portion of the inner conductor 2 by the length for electrical connection, and the end portion of the inner conductor 2 is still covered with the inner insulating layer 3, the outer conductor 4, and the outer insulating layer 5. Since it is connected to a connection partner (not shown), handling at the time of connection is easy, and the internal conductor 2 is not easily broken. Thereby, the terminal processing of the coaxial cable 1 can be easily performed, and the quality can be stabilized.

  Furthermore, according to the terminal structure of the coaxial cable 1 described above, the axial length of the terminal structure of the coaxial cable 1 can be shortened, and it is possible to cope with the downsizing and thinning of communication equipment and electrical equipment. .

  Further, according to the terminal structure of the coaxial cable 1 described above, the ground connection portion 8 is provided in the first cutting portion 6, and the external conductor 4 is grounded via the ground connection portion 8. Therefore, it is possible to easily prevent the occurrence of electromagnetic noise disturbance.

  Further, according to the terminal structure of the coaxial cable 1 described above, since the terminal split conductor 40 is electrically connected to the inner conductor 2, the terminal split conductor 40 is electrically connected to the joint of the connection partner (not shown). As a result, the joint part (not shown) of the connection partner and the internal conductor 2 are electrically connected. That is, since not only the end portion of the inner conductor 2 but also the end portion of the outer conductor 4 (terminal split conductor 40) is a joint portion on the coaxial cable 1 side, the joint area on the coaxial cable 1 side is increased. Thereby, it becomes easy to connect the coaxial cable 1 to a connection other party, and malfunctions, such as a connection failure and a signal strength fall, can be suppressed.

  Furthermore, in the terminal structure of the coaxial cable 1 described above, since the terminal split conductor 40 and the inner conductor 2 are electrically connected via the connection terminal 9, the joint area on the coaxial cable 1 side increases, It can be formed in accordance with the shape of the joint surface of a connection partner not shown. Thereby, it is possible to flexibly cope with various types of connection partners, and the terminal structure of the coaxial cable 1 is highly versatile.

[Second Embodiment]
Next, 2nd Embodiment of the terminal structure of the coaxial cable 1 is described based on FIG. 6, FIG. 6 and 7 are cross-sectional views in which the end of the coaxial cable 1 is cut in the axial direction.
In addition, about the structure similar to 1st Embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the present embodiment, the first cutting portion 6 and the second cutting portion are formed at the end of the coaxial cable 1 without performing the step of moving the outer insulating layer 5 of the coaxial cable 1 to the center side (step shown in FIG. 3). 7 is performed (the process shown in FIG. 4), and then the step of forming the slack portion 30 by moving the end of the inner insulating layer 3 to the center side (the process shown in FIG. 5) is performed.

  Next, as shown in FIG. 6, the terminal split insulator 50 is moved to the center side along the axial direction. As a result, the end portion of the outer conductor 4 (the end portion on the end side of the terminal split conductor 40) protrudes from the end face on the terminal end side of the terminal split insulator 50 and is exposed. Further, the end face on the center side of the terminal split insulator 50 and the end face on the terminal end side of the intermediate split insulator 51 are close to each other, and the insulating portion (slack portion 30) between the terminal split conductor 40 and the intermediate split conductor 41 is closed. .

  Next, as shown in FIG. 7, a conductor such as solder is joined to each end portion of the inner conductor 2 and the outer conductor 4 protruding from each end face of the inner insulating layer 3 and the outer insulating layer 5 to connect terminals. 109 is formed. 7 is filled with solder or the like between the outer peripheral surface of the end portion of the inner conductor 2 and the inner peripheral surface of the end portion of the outer conductor 4, and the outer periphery of the end portion of the outer conductor 4 It is formed by surrounding solder or the like. The outer shape of the joint surface 109 a of the connection terminal 109 is substantially the same as the outer shape of the external insulating layer 5 in a cross-sectional view, and the outer peripheral surface of the connection terminal 109 is substantially flush with the outer peripheral surface of the external insulating layer 5. Has been.

[Third Embodiment]
Next, a third embodiment of the terminal structure of the coaxial cable 1 will be described with reference to FIG. FIG. 8 is a perspective view showing the end portion of the coaxial cable 1.
In addition, about the structure similar to 1st, 2nd embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the present embodiment, as shown in FIG. 8, the coaxial cable terminal portion 1 a on the terminal side of the second cutting portion 7 is formed into a predetermined shape according to the shape of the connection partner. If demonstrating it concretely, the coaxial cable terminal part 1a will be the shape compression-deformed in the radial direction to the elliptical shape (rectangular circle shape) cross-sectional view. The forming of the end portion 1a of the coaxial cable is preferably performed after forming the second cut portion 7 at least at the end portion of the coaxial cable 1.

  According to the terminal structure of the coaxial cable 1 configured as described above, the coaxial cable terminal 1a is formed in a shape that matches the connection partner, so that the formed coaxial cable terminal 1a is fitted to the connection partner. Can do. Therefore, the connection terminal 9 can be reliably brought into contact with the joint surface of the connection partner without mounting a component such as a connector.

As mentioned above, although embodiment of the terminal structure of the coaxial cable which concerns on this invention was described, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the above-described embodiment, the ground connection portion 8 for connecting to the ground wire is formed in the first cutting portion 6, but the present invention connects the first cutting portion 6 to the bias circuit. A bias connection portion may be formed, or a connection portion connected to another external structure may be formed. Furthermore, in the present invention, it is possible to omit connection parts such as the ground connection part 8 and the bias connection part described above. For example, a ground wire terminal (not shown) may be inserted into the first cutting portion 6 and directly joined to the external conductor 4.

Further, in the above-described embodiment, the first cutting portion 6 is incised over the entire circumference of the cable. However, in the present invention, the first cutting portion may not be incised over the entire circumference. The first cutting part cut through about a half circumference may be used.
Further, in the above-described embodiment, the first cutting part 6 cuts the outer insulating layer 5 and the outer conductor 4, respectively, but the first cutting part in the present invention is at least cut off the outer insulating layer. The outer conductor may not be cut. For example, the depth of the first cut portion may be up to the outer peripheral surface of the outer conductor, or may be up to an intermediate portion in the thickness direction of the outer conductor.
In the above-described embodiment, only one first cutting portion 6 is formed. However, in the present invention, a plurality of the first cutting portions 6 may be formed at intervals in the axis O direction.

  In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

DESCRIPTION OF SYMBOLS 1 Coaxial cable 1a Coaxial cable terminal part 2 Inner conductor 3 Inner insulating layer 4 Outer conductor 5 Outer insulating layer 6 First cutting part 7 Second cutting part 8 Ground connection part (connection part)
9, 109 connection terminals

Claims (3)

In the terminal structure of the coaxial cable, the outer peripheral surface of the inner conductor is covered with an inner insulating layer, the outer peripheral surface of the inner insulating layer is covered with an outer conductor, and the outer peripheral surface of the outer conductor is covered with an outer insulating layer.
In the coaxial cable,
A first cut portion extending in the circumferential direction of the coaxial cable and cutting at least the outer insulating layer to divide the outer insulating layer in the axial direction of the coaxial cable;
The coaxial cable is disposed on the end side in the axial direction of the coaxial cable from the first cut portion, extends over the entire circumference of the coaxial cable and cuts the outer insulating layer and the outer conductor. A second cutting portion for dividing the outer insulating layer and the outer conductor in the axial direction of the coaxial cable,
Are formed,
A terminal structure of a coaxial cable, characterized in that a connection terminal made of a conductor that is electrically connected to the inner conductor and the outer conductor is provided on the end face of the coaxial cable. The terminal structure of the coaxial cable according to claim 1,
A terminal structure of a coaxial cable, wherein the first cut portion is provided with a connecting portion made of a conductor that is electrically connected to the outer conductor. In the terminal structure of the coaxial cable according to claim 1 or 2,
The coaxial cable terminal structure is characterized in that the end portion of the coaxial cable closer to the end than the second cut portion is formed.

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