JP2011049045A - Fixing bracket for wire terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing bracket for a wire terminal, capable of securing a wide free space for mounting of a substrate and supporting wires with high retention force. <P>SOLUTION: The fixing bracket 1 for the wire terminal includes a metal plate material fixed to one surface 47 of the substrate 41 by retaining a terminal of a shielded wire 3 formed by cladding an outer periphery of core wires 31 with an insulating inner skin part, a braided part, and an insulated outer skin part in that order. The metal plate material has two side plates 7, 9 for bending both sides in the extending direction of the shielded wire in the same direction and making them in abutment with the one face of the substrate to firmly fix, and two U-shaped crimping parts 11, 13 provided between the side plates for crimping and retaining the insulating outer skin part and an exposed braided part of the shielded wire 3. To the side plates 7, 9, wire insertion holes 15, 19 for the shielded wire 3 to be inserted into are to be formed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a wire terminal fixture that holds a terminal portion of an electric wire and is attached to a mounting substrate.

  Conventionally, as a form of connecting a core wire exposed from an insulating coating portion to a conductor portion of a substrate (mounting substrate) in a terminal portion of an electric wire, Patent Document 1 discloses that a metal thin plate is molded by press working and exposed. A terminal structure including a gripping part that grips the core wire and a cylindrical attachment part that extends from the gripping part is disclosed.

  According to this terminal structure, the core wire is exposed from the end portion of the electric wire, the exposed core wire and the insulating covering portion covering the outer periphery of the core wire are each gripped by two grip portions, and then the terminal mounting portion is mounted on the mounting substrate The core wire and the conductor part on the board (for example, printed circuit) are electrically connected by inserting into the through hole formed on the board and fixing the terminal on the board by crimping the mounting part inserted into the hole in the board. can do.

JP 2006-294315 A

  By the way, according to the terminal structure of Patent Document 1, in order to secure the fixing force of the terminal fixed to the substrate, it is necessary to form the terminal mounting portion, in other words, the through hole of the substrate with a predetermined size. That is, if the through hole is too small, there is a possibility that the fixing force of the terminal will be insufficient, and when the work for attaching the terminal to the board is performed manually, if the through hole is too small, it is difficult to insert the attachment part into the hole. The work efficiency is reduced. Therefore, a relatively large through hole, that is, a space for attaching a terminal must be secured in the substrate, and as a result, there is a problem that the area of the free space for mounting is limited.

  On the other hand, the electric wire attached to the substrate is formed by coating the outer periphery of the core wire in the order of the insulating inner skin portion, the braided portion, and the insulating outer skin portion, and the core wire, the insulating inner skin, and the braided portion are exposed in order from the end of the electric wire. May be used. When such a coaxial wire is connected to the substrate using the terminal of Patent Document 1, even if the exposed core wire and the insulating sheath are gripped by the terminal, an external force is applied to the electric wire to the braided portion or the like. When the collapse occurs, the braided portion may come into contact with the conductor portion of the terminal to cause a short circuit.

  Therefore, in view of the above-described problems, the present invention provides a wire terminal fixture that can secure a wide free space for mounting a substrate and can support an electric wire with a high holding force. And

  In order to solve the above-described problems, the wire terminal fixture of the present invention is an electric wire made of a metal plate material that holds a terminal portion of an electric wire whose outer periphery is covered with an insulating outer skin portion and is fixed to one surface of a mounting substrate. It is a terminal fixture, and the metal plate material is formed by bending two sides of the extending direction of the electric wires in the same direction and abutting against one surface of the mounting substrate and fixing the two side plate portions. And a U-shaped crimping portion that crimps and holds the insulating outer sheath portion of the electric wire, and the side plate portion is formed with a wire insertion hole through which the electric wire is inserted. And

  The wire terminal fixing tool of the present invention is attached to one surface of the mounting substrate, that is, the surface opposite to the mounting surface on which the printed circuit or the like is formed, with the terminal portion of the electric wire with the core wire exposed. Can be used. Here, the exposed core wire is inserted through a through hole formed in the mounting substrate and soldered from the other surface, that is, the mounting surface, so that the electric wire and the conductive portion of the mounting substrate can be electrically connected. it can. Thereby, since the space for terminal attachment of a mounting board is limited to the periphery of a through-hole, the free space for mounting can be ensured widely.

  Further, in the present invention, since the insulated sheath portion is crimped and held in the present invention, and the wire portions on both sides of the crimped and held are guided by being inserted into the wire insertion holes, for example, an external force is applied to the rear leg side of the wire. However, the load applied to the crimping portion can be reduced, and a high holding force of the electric wire can be secured.

  Such a wire terminal fixture is formed by covering the outer periphery of the core wire in the order of the insulating inner skin portion, the braided portion, and the insulating outer skin portion, and exposing the core wire, the insulating inner skin portion, and the braided portion in order from the end portion. Even in the case of holding a shielded electric wire, it is possible to obtain the same effect as in the case of holding a general electric wire that does not have an insulating endothelium part and a braided part. Can be applied.

  That is, a wire terminal fixture made of a metal plate material that holds the shield wire end portion and is fixed to one surface of the mounting substrate, and the metal plate material has both sides of the shield wire extending in the same direction. Two side plate portions that are bent and brought into contact with and fixed to one surface of the mounting substrate, and the insulating skin portion of the shielded electric wire and the exposed braided portion are pressed and held between the two side plate portions. It has two U-shaped crimping portions, and the side plate portion is formed with a wire insertion hole through which the shielded wire is inserted.

  In this way, the electric wire is crimped and held with the insulating outer skin portion and the braided portion, and if, for example, the insulating inner skin portion and the insulating outer skin portion of the electric wire are respectively positioned in the electric wire insertion hole, even if an external force is applied to the electric wire, The load on the crimping part can be reduced, and furthermore, both sides of the crimped and held part of the wire are guided by the wire insertion hole, so that the wire can be prevented from falling down and shorting between the core wire and the braided part is suppressed. be able to.

  In addition, the wire terminal fixing tool as described above is formed by forming a bent surface in contact with one surface of the mounting board on the side plate portion. In this way, the contact area between the one surface of the mounting substrate and the side plate portion can be increased, so that the work for fixing the wire terminal fixture to the mounting substrate is facilitated, and the wire terminal fixture. The fixing force can be improved.

  According to the present invention, it is possible to secure a wide free space for mounting the substrate and to support the electric wire with a high holding force.

It is a perspective view which shows the state which hold | maintained the electric wire in the fixing tool for electric wire terminals to which this invention is applied. It is a perspective view which shows the state fixed to the mounting board | substrate in the state which the electric wire terminal fixing tool formed by applying this invention hold | maintained the electric wire. It is a perspective view of the terminal part of the electric wire hold | maintained at the fixing tool for electric wire terminals to which this invention is applied. It is a perspective view which shows the state before setting an electric wire in the fixing tool for electric wire terminals to which this invention is applied. It is a perspective view which shows the state before setting and crimping | bonding an electric wire in the fixing tool for electric wire terminals to which this invention is applied. It is a perspective view which shows the state after crimping | bonding an electric wire in the fixing tool for electric wire terminals to which this invention is applied.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a wire terminal fixture to which the present invention is applied will be described with reference to the drawings.

  The wire terminal fixture 1 of the present embodiment is attached to one surface of a mounting board (hereinafter abbreviated as a board) while holding the terminal portion of the shielded electric wire 3. As shown in FIG. 1, the wire terminal fixture 1 includes a base portion 5, a first side plate portion 7, a second side plate portion 9, a first pressure bonding portion 11, and a second pressure bonding portion. 13 and is formed by subjecting a metal plate material to press processing such as punching to form a plate material having a predetermined shape, and performing necessary bending processing or the like.

  The first side plate portion 7 and the second side plate portion 9 are formed by bending the longitudinal direction of the base portion 5, that is, both sides of the extending direction of the electric wires in the same direction. The first side plate portion 7 is formed with a first electric wire insertion hole 15 through which the shielded electric wire 3 is inserted, and a first installation portion 17 that is in contact with the surface of the substrate at the bent end. Is formed. Further, the second side plate portion 9 is formed with a second wire insertion hole 19 through which the shielded wire 3 is inserted, and the second side plate portion 9 is in contact with one surface of the substrate at the bent end. The installation part 21 is formed. The first installation portion 17 is formed by bending the first side plate portion 7 substantially at right angles to the direction of the second side plate portion 9, and the second installation portion 21 is formed by bending the second side plate portion 9 to the first side plate portion 9. It is formed by being bent at a substantially right angle in the direction of the side plate portion 7.

  The first crimping part 11 and the second crimping part 13 are both shielded wires by bending inwardly crimping pieces extending in U-shapes from both sides in the short direction of the base part 5. 3 is wrapped and crimped.

  As shown in FIG. 3, the shielded wire 3 held by the wire terminal fixture 1 includes an insulating inner skin portion 33 that covers the outer periphery of the core wire 31, and a conductive braid portion 35 that covers the outer periphery of the insulating inner skin portion 33. The insulating outer skin portion 37 that covers the outer periphery of the braided portion 35 is formed. The insulating inner skin portion 33 and the insulating outer skin portion 37 are formed of a synthetic resin insulator, and the core wire 31 and the braided portion 35 are conductors. The terminal portion of the shielded electric wire 3 is exposed in the order of the core wire 31, the insulating endothelial portion 33, and the braided portion 35.

  Next, a method for assembling and holding the shielded electric wire 3 to the electric wire terminal fixture 1 will be described with reference to FIGS. 4 to 6.

  First, the wire terminal fixture 1 shown in FIG. 4 and the shielded electric wire 3 in which the terminal portion shown in FIG. 3 is exposed are prepared. Next, the shielded electric wire 3 is inserted through the second electric wire insertion hole 19 of the electric wire terminal fixture 1, and the tip of the inserted shielded electric wire 3 is inserted into the first electric wire insertion hole 15. The insertion of the shield wire 3 is stopped when, for example, the end portion of the insulating outer skin portion 37 comes into contact with a step formed in the base portion 5 between the first crimping portion 11 and the second crimping portion 13.

  As shown in FIG. 5, when the insertion of the shielded electric wire 3 is stopped, the insulating inner skin portion 3 and the insulating outer skin portion 37 are arranged in the first electric wire insertion hole 15 and the second electric wire insertion hole 19, respectively. In addition, an insulating endothelium portion 33 is disposed at the position of the base portion 5 sandwiched between the first pressure-bonding portions 11 (two pressure-bonding pieces), and the second pressure-bonding portion 13 (two pressure-bonding pieces). An insulating skin portion 37 is disposed at the position of the sandwiched base portion 5.

  After such a state, as shown in FIG. 6, the wire terminal fixture 1 is crimped so that the two crimping pieces of the first crimping part 11 are bent and the braided part 35 is wrapped, The two crimping pieces of the second crimping portion 13 are bent and crimped so as to wrap the insulating outer skin portion 37. And the core wire 31 exposed from the shielded electric wire 3 penetrating the first electric wire insertion hole 15 is attached in the direction in which the first side plate portion 7 and the second side plate portion 9 extend, that is, the wire terminal fixture 1. The substrate is bent toward the surface side of the substrate.

  Next, the wire terminal fixture 1 holding the shielded electric wire 3 in this manner is set on the substrate 41. Here, as shown in FIG. 2, the substrate 41 has a through hole 43 through which the core wire 3 is inserted and a soldering surface 45 on which the first installation portion 17 and the second installation portion 21 are respectively installed. Is provided. Therefore, when attaching the wire terminal fixture 1 to the board 41, the core wire 31 of the shielded wire 3 supported by the wire terminal fixture 1 is inserted into the through hole 43 and the first installation portion 17 The second installation portions 21 are brought into contact with the soldering surface 45 and fixed by soldering.

  The core wire 31 that is inserted into the through hole 43 of the substrate 41 and protrudes from the mounting surface 49 on the opposite side of the mounting surface 47 of the substrate 41 to which the wire terminal fixture 1 is fixed is soldered at the periphery of the through hole 43. It is electrically connected to a printed circuit or the like formed on the mounting surface 49. The shielded wire 3 held by the wire terminal fixture 1 is routed along the mounting surface 47 of the substrate 41 and connected to the power supply side (not shown), and the printed circuit on the mounting surface 49 is an electrical component (not shown). Is energized.

  As described above, according to the present embodiment, the connection between the core wire 31 of the shielded electric wire 3 and the conductive portion of the substrate 41 is made by soldering at the periphery of the through hole 43 formed in the substrate 41. When compared with a terminal structure in which a terminal mounting portion is inserted into a through-hole formed in a substrate as in Patent Document 1 and this is crimped and fixed on the substrate, the space for terminal mounting can be reduced. Therefore, in such mounting surface 49 of the substrate 41, it is possible to secure a wide mountable free space, such as a printed circuit, for example, it is possible to reduce the noise due to the ground pattern becomes wider.

  Further, in the wire terminal fixture 1 of the present embodiment, as a structure for holding the shielded electric wire 3, the braided portion 35 and the insulating outer skin portion 37 are respectively pressed and held, and the insulating endothelium in the first electric wire insertion hole 15. The part 33 is arranged, and the insulating outer skin part 37 is arranged in the second electric wire insertion hole 19 to be guided. Therefore, even if an external force is applied to the rear leg side of the shielded electric wire 3, it is possible to reduce a load applied to the crimped portion and the like, and to secure a high holding power of the shielded electric wire 3. Further, for example, when the electric wire terminal fixture 1 is assembled to the substrate 41, even if an external force is applied to the insulating endothelium portion 33, the braided portion 35, or the like of the shielded electric wire 3, the core wire 31 is separated from the electric wire terminal fixture 1. For example, a short circuit between the core wire 31 and the braided portion 35 can be suppressed because the terminal portion excluding the core wire 31 does not fall down.

  Moreover, in this Embodiment, although it does not mention in particular about the magnitude | size of the hole of the 1st electric wire penetration hole 15 and the 2nd electric wire penetration hole 19 in the fixing tool 1 for electric wire terminals, the 1st electric wire penetration hole 15 is a range in which the insulating endothelium portion 33 is inserted and the braided portion 35 is not inserted, in other words, a slight gap that does not impair the guide function of the first electric wire insertion hole 15 with the insulating endothelium portion 33 inserted. The second wire insertion hole 19 is formed with a slight gap that does not impair the guide function in the state in which the insulating outer skin portion 37 is inserted. It is preferable that the hole diameter is formed. In this way, when the shield wire 3 is inserted through the wire terminal fixture 1, the first wire insertion hole 15 can have a function as a stopper, and the first wire insertion hole 15 The guide function by the 2nd electric wire penetration hole 19 can be improved.

  Moreover, in this Embodiment, in the electric wire terminal fixture 1, the 1st installation part 17 is formed in the 1st side-plate part 7, and the 2nd installation part 21 is formed in the 2nd side-plate part 9. Thus, a large area is ensured in which the first side plate portion 7 and the second side plate portion 9 are in contact with the mounting surface 47 of the substrate 41. Therefore, the work of fixing the wire terminal fixture 1 to the substrate 41 can be facilitated, and the fixing force of the wire terminal fixture 1 can be improved.

  Moreover, in the said embodiment, although the case where the shielded electric wire 3 was used as an electric wire hold | maintained at the electric wire terminal fixture 1 was hold | maintained, the general electric wire which does not have the insulating endothelium part 33 and the braided part 35 is hold | maintained. Of course it is also possible. In that case, the electric wire terminal fixture presses and holds only the insulating skin portion covering the outer periphery of the core wire.

  Moreover, in the said embodiment, although the case where the electric wire terminal fixing tool 1 was soldered and attached to the soldering surface 45 formed in the attachment surface 47 of the board | substrate 41 was demonstrated, the attachment method is limited to this example. In short, if the wire terminal fixture 1 is a structure that is fixed to the substrate 41 via the first side plate portion 7 and the second side plate portion 9, the structure of the substrate 41 is the same. It is not limited.

DESCRIPTION OF SYMBOLS 1 Electric wire terminal fixing tool 3 Shielded electric wire 5 Base part 7 1st side board part 9 2nd side board part 11 1st crimping part 13 2nd crimping part 15 1st electric wire penetration hole 17 1st installation part 19 2nd electric wire penetration hole 21 2nd installation part 31 Core wire 33 Insulating endothelium part 35 Braiding part 37 Insulating outer skin part 41 Substrate 43 Through hole 45 Soldering surface 47 Mounting surface 49 Mounting surface

Claims (3)

An electric wire terminal fixture made of a metal plate that holds the terminal portion of the electric wire covering the outer periphery of the core wire with an insulating outer skin portion and is fixed to one surface of the mounting substrate,
The metal plate material is provided between two side plate portions and two side plate portions that are fixed in contact with one surface of the mounting substrate by bending both sides in the extending direction of the electric wire in the same direction, A wire terminal fixing device comprising: a U-shaped crimping portion that crimps and holds the insulating outer skin portion of the wire; and the side plate portion is formed with a wire insertion hole through which the wire is inserted. Ingredients. An electric wire terminal fixture made of a metal plate material that holds a terminal portion of a shielded electric wire formed by covering an outer periphery of a core wire in the order of an insulating inner skin portion, a braided portion, and an insulating outer skin portion, and is fixed to one surface of a mounting board. Because
The metal plate material is provided between two side plate portions, and two side plate portions that are fixed in contact with one surface of the mounting board by bending both sides in the extending direction of the shield wire in the same direction. , Having two U-shaped crimping portions for crimping and holding the insulating sheath portion of the shielded wire and the exposed braided portion,
An electric wire terminal fixture in which an electric wire insertion hole through which the shielded electric wire is inserted is formed in the side plate portion.   The electric wire terminal fixture according to any one of claims 1 and 2, wherein the side plate portion is formed with a bent surface that comes into contact with one surface of the mounting substrate.

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