JP2015099714A - Coaxial wire terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coaxial wire terminal capable of preventing disconnection of a core wire by mitigating a fastening force caused by a caulking part of an outer terminal.SOLUTION: A coaxial wire terminal 1 includes: a coaxial wire 11 including a core wire 3, an insulator 5, a braid 7 and a sheath 9; an inner terminal 13 connected to the core wire 3 of the coaxial line 11; an outer terminal 17 including a caulking part 15 that is connected by caulking the braid 7 of the coaxial wire 11; and a matching member 19 having a dielectric constant. The insulator 5 of the coaxial wire 11 includes an inner insulation part 21, an outer insulation part 23 and a space 25 formed from the inner insulation part 21 and the outer insulation part 23. The inner terminal 13 and the matching member 19 extend an insertion part 27 to be inserted into the space 25 of the insulator 5, respectively, in a length direction of the coaxial wire 11 and the insertion part 27 is set to a length exceeding the caulking part 15 of an outer terminal 17 while being inserted into the space 25 of the insulator 5.

Description

  The present invention relates to a coaxial line terminal disposed at a terminal portion of a coaxial line.

  Conventionally, as a coaxial wire terminal, an outer periphery of an inner conductor as a core wire is covered with an insulator, a braid is disposed on the outer periphery of the insulator, and the outer periphery of the braid is covered with a sheath, The inner conductor terminal as the inner terminal connected to the inner conductor exposed at the terminal portion and exposed from the insulator, and the braid exposed at the outer peripheral side of the inner conductor terminal at the end portion of the coaxial line are connected by crimping An outer conductor terminal as an outer terminal having a crimped portion, and a dielectric that is disposed between the inner conductor terminal and the outer conductor terminal at the end portion of the coaxial line and maintains an insulation state between the inner conductor terminal and the outer conductor terminal What is provided with the dielectric as a matching member which has a rate is known (for example, refer to patent documents 1).

  In this coaxial wire terminal, the caulking portion of the outer conductor terminal has a pair of braided crimping pieces, and the pair of braided crimping pieces is crimped to the knitted ancestor of the coaxial line by a crimping machine. And the braid of the coaxial wire are electrically connected.

JP 2008-27881 A

  By the way, in the coaxial wire terminal as in Patent Document 1, the crimping portion of the outer terminal is crimped and connected to the braid of the coaxial wire, so if the tightening force of the crimping portion is increased, the outer terminal The fixing force with respect to the coaxial line is also increased, and the connection reliability between the outer terminal and the braid of the coaxial line is improved.

  However, if the tightening force of the caulking portion of the outer terminal is increased, the compression rate of the coaxial line increases, so that the stress applied to the core line located at the center of the coaxial line increases and the core line may be disconnected. was there.

  Therefore, an object of the present invention is to provide a coaxial line terminal that can alleviate the tightening force of the outer terminal crimping portion and prevent the core wire from being disconnected.

  In the first aspect of the invention, the outer periphery of the core wire is covered with an insulator, a braid is disposed on the outer periphery of the insulator, and the outer periphery of the braid is covered with a sheath, and the coaxial wire is disposed at the end of the coaxial wire. An inner terminal that is connected to the core wire exposed from the insulator, and a crimping portion that is disposed on the outer peripheral side of the inner terminal at the end portion of the coaxial wire and is connected by crimping the braid exposed from the sheath A coaxial terminal provided with an outer terminal, and a matching member disposed between the inner terminal and the outer terminal at a terminal portion of the coaxial line and having a dielectric constant that maintains an insulation state between the inner terminal and the outer terminal. The coaxial terminal is formed of an inner insulating portion that covers an outer periphery of the core wire, an outer insulating portion whose outer periphery is covered by the braid, the inner insulating portion, and the outer insulating portion. Space part In at least one of the inner terminal and the alignment member, an insertion portion to be inserted into the space portion of the insulator is extended in the length direction of the coaxial line, and the insertion portion is The length of the outer terminal is set to be longer than the caulking portion of the outer terminal in a state of being inserted into the space portion of the insulator.

  In this coaxial wire terminal, the insertion portion provided on either the inner terminal or the alignment member is set to a length that exceeds the caulking portion of the outer terminal in a state where the insertion portion is inserted into the space portion of the insulator. Thus, the tightening force applied to the core wire by the crimping portion can be relaxed by the insertion portion, and disconnection of the core wire due to an increase in the tightening force of the crimping portion can be prevented.

  Therefore, in such a coaxial line terminal, since the insertion portion provided in either the inner terminal or the alignment member is disposed at the position of the crimping portion of the outer terminal, the crimping portion of the outer terminal The tightening force can be relaxed, and the core wire can be prevented from being disconnected.

  In addition, when the alignment member is provided with the insertion portion, the insertion portion is set to a length that exceeds the caulking portion of the outer terminal, so that the alignment member is arranged up to the portion where the braid of the coaxial line is exposed. As a result, impedance matching can be achieved.

  A second aspect of the present invention is the coaxial line terminal according to the first aspect, wherein the insertion portion is press-fitted into a space portion of the insulator.

  In this coaxial wire terminal, since the insertion portion is press-fitted into the space portion of the insulator, the inner terminal and the alignment member do not shift with respect to the coaxial line, and the inner terminal and the alignment member with respect to the coaxial line are not caused. Can be fixed.

  Advantageous Effects of Invention According to the present invention, it is possible to provide a coaxial line terminal that can relieve the tightening force caused by the caulking portion of the outer terminal and can prevent disconnection of the core wire.

It is a disassembled perspective view of the terminal for coaxial wires concerning an embodiment of the invention. (A) is a perspective view of the coaxial line of the terminal for coaxial lines which concerns on embodiment of this invention. FIG. 2B is a partial cross-sectional view of FIG. It is a perspective view of the inner terminal of the terminal for coaxial wires concerning an embodiment of the invention. (A) is a perspective view of the alignment member of the terminal for coaxial wires which concerns on embodiment of this invention. (B) is sectional drawing of Fig.4 (a). (A) is a side view of the coaxial line of the terminal for coaxial lines which concerns on embodiment of this invention. (B) is sectional drawing of Fig.5 (a). It is sectional drawing when the inner terminal of the terminal for coaxial wires which concerns on embodiment of this invention, and a matching member are assembled | attached to a coaxial wire. It is sectional drawing when the inner terminal and matching member of the terminal for coaxial lines which concern on embodiment of this invention are assembled | attached to the coaxial line. (A) is sectional drawing of the terminal for coaxial wires which concerns on embodiment of this invention. (B) is XX sectional drawing of Fig.8 (a).

  A coaxial line terminal according to an embodiment of the present invention will be described with reference to FIGS.

  In the coaxial wire terminal 1 according to the present embodiment, the outer periphery of the core wire 3 is covered with an insulator 5, a braid 7 is disposed on the outer periphery of the insulator 5, and the outer periphery of the braid 7 is covered with a sheath 9. 11, the inner terminal 13 connected to the core wire 3 disposed at the end portion of the coaxial line 11 and exposed from the insulator 5, and the outer terminal side of the inner terminal 13 disposed at the end portion of the coaxial line 11 and exposed from the sheath 9. Between the inner terminal 13 and the outer terminal 17 disposed between the inner terminal 13 and the outer terminal 17 at the terminal portion of the coaxial wire 11. And a matching member 19 having a dielectric constant for maintaining an insulating state.

  The insulator 5 of the coaxial wire 11 is formed by an inner insulating portion 21 that covers the outer periphery of the core wire 3, an outer insulating portion 23 whose outer periphery is covered by the braid 7, and the inner insulating portion 21 and the outer insulating portion 23. And a space portion 25.

  Further, the inner terminal 13 and the alignment member 19 are respectively provided with insertion portions 27 inserted in the space portion 25 of the insulator 5 in the length direction of the coaxial line 11.

  The insertion portion 27 is set to a length exceeding the crimping portion 15 of the outer terminal 17 in a state where the insertion portion 27 is inserted into the space portion 25 of the insulator 5.

  Further, the insertion portion 27 is press-fitted into the space portion 25 of the insulator 5.

  As shown in FIGS. 1 to 8, the coaxial wire 11 includes a core wire 3, an insulator 5, a braid 7, and a sheath 9. The core wire 3 has a plurality of strands made of a conductive material twisted together. The outer periphery of the core wire 3 is covered with an insulator 5.

  The insulator 5 is made of an insulating material such as a synthetic resin, and includes an inner insulating portion 21, an outer insulating portion 23, and a space portion 25.

  The inner insulating portion 21 is provided in close contact with the outer periphery of the core wire 3 so as to cover the outer periphery of the core wire 3. On the outer periphery of the inner insulating portion 21, a plurality of (four in this case) support portions 29 are formed continuously in the outer circumferential direction at equal intervals in the circumferential direction. An outer insulating portion 23 is disposed therebetween.

  The outer insulating portion 23 is formed on the outer diameter side of the support portion 29 as one member continuous with the support portion 29, and the outer periphery is covered with the braid 7. A plurality of space portions 25 are provided between the outer insulating portion 23, the inner insulating portion 21, and the support portion 29.

  The space portion 25 includes a space formed between the outer periphery of the inner insulating portion 21 and the inner periphery of the outer insulating portion 23, and is divided into a plurality (four in this case) by the support portion 29. The braid 7 is disposed on the outer periphery of the outer insulating portion 23 that forms the space portion 25.

  The braid 7 is formed by knitting a plurality of strands made of a conductive material, and is arranged so as to cover the outer periphery of the outer insulating portion 23. The outer periphery of the braid 7 is covered with a sheath 9.

  The sheath 9 is made of an insulating material such as synthetic resin, and is provided in close contact with the outer periphery of the braid 7 so as to cover the outer periphery of the braid 7.

  The coaxial wire 11 thus configured is subjected to terminal processing in which the core wire 3 and the braid 7 are exposed at the terminal portion, the inner terminal 13 is connected to the exposed core wire 3, and the outer braid 7 is exposed to the outer terminal. 17 is connected.

  The inner terminal 13 is made of a conductive material, and is made of a female terminal having a box-shaped connection portion 31. The inner terminal 13 is electrically connected to the core wire 3 by crimping a crimping portion 33 against the core wire 3 of the coaxial wire 11.

  For example, such an inner terminal 13 is electrically connected to a counterpart terminal by inserting a connection portion of a counterpart terminal (not shown) including a male terminal connected to a power source or a device into the connection portion 31. Then, the power source, equipment, and the like are electrically connected to the coaxial line 11. An outer terminal 17 is disposed on the outer peripheral side of the inner terminal 13.

  The outer terminal 17 is made of a conductive material, and has, for example, a cylindrical portion 35 disposed on the outer periphery of a housing (not shown) that houses the inner terminal 13. The outer terminal 17 is electrically connected to the braid 7 by caulking the caulking portion 15 with respect to the braid 7 of the coaxial wire 11, and by caulking the fixing portion 37 with respect to the sheath 9 of the coaxial wire 11. It is fixed to the coaxial line 11.

  Such an outer terminal 17 is electrically connected to the braid 7 by caulking the caulking portion 15 to the braid 7 of the coaxial wire 11 with a jig or the like, thereby leaking noise or the like from the core wire 3. A shield circuit is formed to prevent intrusion of noise or the like into the device. A matching member 19 is disposed between the outer terminal 17 and the inner terminal 13 at the end of the coaxial line 11.

  The alignment member 19 is made of, for example, an insulating synthetic resin material having a dielectric constant such as polybutylene terephthalate (PBT) or liquid crystal polymer (LCP), and is formed in an annular shape. And the outer terminal 17 are kept in an insulated state. The matching member 19 can control the dielectric constant by changing the synthetic resin material used.

  In such an alignment member 19, a through hole 39 is provided in the center portion, and the core wire 3 of the coaxial line 11 is inserted into the through hole 39 in a state where the through hole 39 is disposed at the terminal portion of the coaxial line 11. The core wire 3 inserted through the through-hole 39 is crimped and electrically connected to the crimping portion 33 of the inner terminal 13.

  The alignment member 19 and the inner terminal 13 are each provided with an insertion portion 27 extending in the length direction of the coaxial wire 11 toward the coaxial wire 11, and the insertion portion 27 is connected to the insulator 5 of the coaxial wire 11. It is inserted into the formed space 25.

  The insertion portion 27 of the inner terminal 13 is extended by a single member that is continuous from the crimping portion 33 toward the coaxial line 11 side. The insertion portion 27 of the inner terminal 13 is inserted into the through hole 39 of the alignment member 19 in a state where the alignment member 19 is disposed at the end portion of the coaxial wire 11, and is formed in the insulator 5 of the coaxial wire 11. The space portion 25 is press-fitted into one space portion 25.

  Thus, the inner terminal 13 can be stably fixed to the coaxial wire 11 by press-fitting the insertion portion 27 of the inner terminal 13 into the space portion 25 formed in the insulator 5 of the coaxial wire 11. The insertion portion 27 of the alignment member 19 is inserted into the space portion 25 other than the space portion 25 into which the insertion portion 27 of the inner terminal 13 is inserted.

  The insertion portion 27 of the alignment member 19 is extended by a single member that is continuous from the end face on the coaxial line 11 side toward the coaxial line 11 at a plurality of circumferential positions (here, three positions). When the insertion portion 27 of the alignment member 19 is disposed at the terminal portion of the coaxial line 11, the insertion portion 27 other than the space portion 25 into which the insertion portion 27 of the inner terminal 13 formed in the insulator 5 of the coaxial line 11 is inserted. It is press-fitted into the other space part 25.

  Thus, the alignment member 19 is press-fitted into the space portion 25 other than the space portion 25 into which the insertion portion 27 of the inner terminal 13 formed in the coaxial insulator 5 is inserted, thereby aligning the alignment member 19. 19 can be stably fixed with respect to the coaxial line 11, and the state in which the position of the space portion 25 into which the insertion portion 27 of the inner terminal 13 is inserted and the through hole 39 are aligned can be reliably maintained. it can.

  The insertion portion 27 provided in each of the inner terminal 13 and the alignment member 19 is in a state where the extension length toward the coaxial line 11 is press-fitted into the space portion 25 of the insulator 5 of the coaxial line 11. Thus, the length of the outer terminal 17 is set so as to exceed the caulking portion 15.

  For this reason, in a state where the inner terminal 13 and the alignment member 19 are assembled to the coaxial line 11, the insertion part 27 is disposed at a position where the crimping part 15 of the outer terminal 17 of the coaxial line 11 is crimped. By caulking the caulking portion 15 of the outer terminal 17 with respect to the braid 7 of the coaxial line 11 in which the insertion portion 27 is arranged in this manner, the caulking portion 15 as shown by the arrow in FIG. The tightening force applied to the core wire 3 can be relaxed by the insertion portion 27, and disconnection of the core wire 3 due to an increase in the tightening force of the crimping portion 15 can be prevented.

  On the other hand, in the terminal portion where the braid 7 of the coaxial wire 11 is exposed, the crimping portion 15 of the outer terminal 17 in a state where the insertion portion 27 of the alignment member 19 is press-fitted into the space portion 25 of the insulator 5 of the coaxial wire 11. Therefore, the matching member 19 is disposed up to the portion where the braid 7 of the coaxial line 11 is exposed, and impedance matching can be achieved.

  For the assembly of the coaxial line terminal 1 to the coaxial line 11, first, the end treatment of the coaxial line 11 is performed so that the core wire 3 and the braid 7 of the coaxial line 11 are exposed. Next, the core wire 3 of the coaxial line 11 is inserted into the through hole 39 of the alignment member 19 with respect to the terminal portion of the coaxial line 11, and the insertion portion 27 of the alignment member 19 is inserted into the space portion of the insulator 5 of the coaxial line 11. The alignment member 19 is assembled to the coaxial line 11.

  Next, the insertion portion 27 of the inner terminal 13 is inserted from the through hole 39 of the alignment member 19 and is press-fitted into the space portion 25 of the insulator 5 of the coaxial wire 11, and the inner terminal 13 is assembled to the coaxial wire 11. Next, the crimp portion 33 of the inner terminal 13 is crimped to the core wire 3 of the coaxial wire 11 to electrically connect the inner terminal 13 and the core wire 3.

  And the outer terminal 17 is arrange | positioned with respect to the terminal part of the coaxial wire 11, and the outer terminal 17 and the braid 7 are electrically connected by crimping the crimping part 15 of the outer terminal 17 to the braid 7 of the coaxial wire 11. At the same time, the outer terminal 17 is assembled to the coaxial line 11 by crimping the fixing portion 37 of the outer terminal 17 to the sheath 9 of the coaxial line 11.

  In such a coaxial line terminal 1, the caulking portion 15 of the outer terminal 17 in a state where the insertion portions 27 provided in the inner terminal 13 and the alignment member 19 are inserted into the space portion 25 of the insulator 5. Therefore, the tightening force applied to the core wire 3 by the crimping portion 15 can be relaxed by the insertion portion 27, and disconnection of the core wire 3 due to an increase in the tightening force of the crimping portion 15 can be prevented. Can do.

  Accordingly, in such a coaxial line terminal 1, the insertion portions 27 provided on the inner terminal 13 and the alignment member 19 are disposed at the position of the crimping portion 15 of the outer terminal 17. The tightening force by the tightening portion 15 can be relaxed, and disconnection of the core wire 3 can be prevented.

  Further, since the insertion portion 27 provided in the alignment member 19 is set to a length exceeding the crimping portion 15 of the outer terminal 17, the alignment member 19 is disposed up to a portion where the braid 7 of the coaxial line 11 is exposed. As a result, impedance matching can be achieved.

  Further, since the insertion portion 27 is press-fitted into the space portion 25 of the insulator 5, the inner terminal 13 and the alignment member 19 are not displaced with respect to the coaxial line 11, and the inner terminal 13 with respect to the coaxial line 11 is not caused. And the fixing of the alignment member 19 can be stabilized.

  In the coaxial line terminal according to the embodiment of the present invention, the insertion portion is provided in each of the inner terminal and the alignment member. However, the present invention is not limited thereto, and the insertion portion is provided only in the inner terminal or only in the alignment member. It may be provided.

  In addition, although there are a plurality of alignment member insertion portions, the present invention is not limited to this. For example, a plurality of insertion portions may be provided for the inner terminal, or one insertion portion may be provided for each of the inner terminal and the alignment member. The number may be set according to the space portion of the insulator of the coaxial line to be inserted.

DESCRIPTION OF SYMBOLS 1 ... Coaxial wire terminal 3 ... Core wire 5 ... Insulator 7 ... Braiding 9 ... Sheath 11 ... Coaxial wire 13 ... Inner terminal 15 ... Clamping part 17 ... Outer terminal 19 ... Matching member 21 ... Inner insulation part 23 ... Outer insulation part 25 ... Space 27 ... Insertion

Claims (2)

A coaxial line in which the outer periphery of the core wire is covered with an insulator, a braid is disposed on the outer periphery of the insulator, and the outer periphery of the braid is covered with a sheath, and the core wire that is disposed at the end of the coaxial line and is exposed from the insulator An outer terminal having an inner terminal connected to the outer peripheral terminal of the coaxial line, and an outer terminal having a caulking part that is disposed on the outer peripheral side of the inner terminal and is exposed from the sheath by caulking the braid. A coaxial line terminal provided with a matching member disposed between the inner terminal and the outer terminal at a terminal portion thereof and having a dielectric constant that maintains an insulating state between the inner terminal and the outer terminal,
The coaxial wire insulator includes an inner insulating portion that covers the outer periphery of the core wire, an outer insulating portion that is covered with the braid, and a space formed by the inner insulating portion and the outer insulating portion. And
In at least one of the inner terminal and the alignment member, an insertion portion to be inserted into the space portion of the insulator is extended in the length direction of the coaxial line,
The coaxial wire terminal, wherein the insertion portion is set to a length that exceeds a caulking portion of the outer terminal in a state of being inserted into the space portion of the insulator. The coaxial wire terminal according to claim 1,
The coaxial wire terminal, wherein the insertion portion is press-fitted into a space portion of the insulator.

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