JP2010056022A - Terminal fitting, and electric cable with terminal fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal fitting capable of preventing jumping of the terminal part of the electric cable, and to provide an electric cable with the terminal fitting. <P>SOLUTION: The terminal fitting 10 has a connecting part 11 to be connected to a mating terminal fitting, a bottom plate 16 which has a shape extending to the rear from the connecting part 11 and on which the terminal part of the electric cable 20 is mounted, and a wire barrel 12 which is caulked to the terminal part of the electric cable 20 mounted on the bottom plate 16. A jumping prevention member 18 which can suppress jumping of the terminal part at the time of caulking of the electric cable 20 is installed oppositely to the face of the mounting side of the terminal part of the electric cable 20 on the bottom plate 16 at the position on the connecting part 11 side farther than the wire barrel 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a terminal fitting having a wire barrel that is caulked to a terminal portion of an electric wire and an electric wire with terminal fitting.

Conventionally, as this type of terminal fitting, for example, a terminal fitting described in Patent Document 1 is known. This terminal fitting is formed by forming a wire barrel behind a connecting portion connected to a counterpart terminal.
The wire barrel is caulked to the exposed core wire of the end portion of the electric wire. The wire barrel is caulked at a position where the end of the core wire protrudes forward so that the entire wire barrel is caulked.
JP 2004-303526 A

  By the way, when the wire barrel is caulked to the terminal portion of the electric wire, the tip of the core wire (the portion protruding forward from the wire barrel) tends to jump up. And if the tip of the core wire is bounced up, for example, the following problems may occur. When inserting a retainer to prevent the terminal fitting from coming off behind the terminal fitting connection, if the core wire bounces up behind the terminal fitting connection (retainer fitting portion), the retainer However, it is a problem that it is obstructed to fit in a proper position.

  Furthermore, in recent years, a core wire made of an aluminum alloy has been used to reduce the weight of the electric wire in place of the core wire made of a copper alloy that has been generally used mainly in the field of wire harnesses for automobiles. It is increasing. For aluminum alloys, it is necessary to take measures to prevent an increase in contact resistance because it is difficult to remove the oxide film compared to copper alloys. As one of these measures, the wire barrel is made stronger than before. There is a method of caulking to the core wire. However, when the core wire is caulked more strongly than in the past, there is a circumstance that the jump of the core wire becomes more conspicuous, and a device for preventing the jump of the end portion of the electric wire has been desired.

  This invention is completed based on the above situations, Comprising: It aims at providing the terminal metal fitting which can prevent the jumping of the terminal part of an electric wire, and an electric wire with a terminal metal fitting.

  The terminal fitting of the present invention has a connection portion connected to the counterpart terminal, a shape extending rearward from the connection portion, a bottom plate on which a terminal portion of the electric wire is placed, and the electric wire placed on the bottom plate A terminal barrel having a wire barrel that is caulked to the terminal portion of the base plate, the surface of the bottom plate on which the terminal portion of the electric wire is placed at a position closer to the connection portion than the wire barrel; Oppositely, a bounce prevention piece capable of suppressing the jumping of the terminal portion when the electric wire is caulked is provided.

  According to such a configuration, when the end portion of the electric wire is inserted between the bottom plate and the anti-bounce piece and the wire barrel is crimped, the electric wire end portion is prevented from jumping up by the anti-bounce piece. Therefore, it is possible to prevent the terminal portion of the electric wire from jumping up.

  Moreover, it is good also as what provided the stop piece which can contact | abut the front-end | tip of the terminal part of the said electric wire in the position of the said connection part side rather than the said wire barrel. Thereby, the electric wire is arranged in the regular position where the tip of the terminal part protrudes to the connection part side rather than the wire barrel by arranging the electric wire by placing the tip of the terminal part of the electric wire against the front stopper piece. Therefore, the electric wire can be easily arranged at a regular position.

Moreover, the said splash prevention piece is good also as what is bent to the side by which the terminal part of the said electric wire is mounted from the side edge along the extension direction of the said baseplate. According to such a configuration, for example, when the bottom plate is cut and raised to form the splash prevention piece, an opening is formed in the bottom plate, and the strength of the terminal fitting is reduced accordingly, but such an opening is not formed. Therefore, it is possible to prevent the strength of the terminal fitting from being lowered.
Furthermore, the said front stop piece is good also as what is bent to the said baseplate side from the edge by the side of the said connection part among the said splash prevention pieces. According to such a configuration, for example, when the front plate is formed by cutting and raising the bottom plate, an opening is formed in the bottom plate, and the strength of the terminal fitting is reduced accordingly, but such an opening is not formed. Therefore, it is possible to prevent the strength of the terminal fitting from being lowered.

  The electric wire with a terminal metal fitting of the present invention is an electric wire with a terminal metal fitting in which the terminal metal fitting is caulked to the terminal portion of the electric wire, and the terminal metal fitting is connected to the mating terminal and the rear from the connecting portion. A bottom plate on which the terminal portion of the electric wire is placed, and a wire barrel that is caulked to the terminal portion of the electric wire placed on the bottom plate, and the connecting portion is more than the wire barrel. In the position on the side, a bounce prevention piece is provided that faces the surface of the bottom plate on the side on which the terminal portion of the electric wire is placed and can suppress the jumping of the terminal portion when caulking the electric wire. It has the characteristics.

  ADVANTAGE OF THE INVENTION According to this invention, the terminal metal fitting which can prevent the jumping of the terminal part of an electric wire and an electric wire with a terminal metal fitting can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In this embodiment, an example in which the present invention is applied to a female terminal fitting 10 is shown. The terminal fitting 10 of this embodiment is formed by bending after being punched into a predetermined developed shape from a flat metal plate by a press molding machine. The terminal fitting 10 has a connecting portion 11 connected to a mating male terminal fitting (not shown), and a wire barrel 12 and an insulation barrel 13 formed sequentially behind the connecting portion 11. Hereinafter, in each component member, the upper side in FIG. 1 will be described as the upper side, the lower side as the lower side, the lower left side (connection portion 11 side) as the front, and the upper right side as the rear.

  The connecting portion 11 is bent and formed into a rectangular tube shape having an elastic contact piece 14 inside and is elongated in the front-rear direction, and a tab (not shown) of the mating male terminal fitting is inserted through the opening 15 on the front surface to make elastic contact. It comes into contact with the piece 14.

  A bottom plate 16 on which the terminal portion of the electric wire 20 is placed is provided behind the connection portion 11. The bottom plate 16 has a long shape in the front-rear direction extending rearward from the lower wall 17U on the lower side of the peripheral wall 17 constituting the connecting portion 11. The bottom plate 16 has a shape in which both side edge portions 16S extending in the longitudinal direction (along the extending direction of the bottom plate 16) are bent upward at a substantially right angle. The front ends of both side edge portions 16S of the bottom plate 16 are connected to a pair of side walls 17S (walls rising upward from both side edges in the short direction of the lower wall 17U) of the peripheral walls 17 constituting the connection portion 11 in the short direction. ing. The upper edge of the side edge portion 16 </ b> S of the bottom plate 16 (both side edges of the bottom plate 16) is located at the approximate center of the connecting portion 11 in the vertical direction.

  The wire barrel 12 is provided at a position spaced rearward from the connection portion 11 by a predetermined dimension. The wire barrel 12 is caulked to the core wire 22 protruding from the end portion of the insulating coating 23 in the end portion of the electric wire 20 placed on the bottom plate 16. As shown in FIG. 2, the wire barrel 12 has a shape in which a pair of caulking pieces 12 </ b> A protrudes from both side edges of the bottom plate 16 to both sides as shown in FIG. 2. Further, the wire barrel 12 has a shape in which both the caulking pieces 12A are opposed to each other at a predetermined interval as shown in FIG. 1 after being bent and before being caulked to the electric wire 20. .

  The insulation barrel 13 is provided at a position spaced rearward from the wire barrel 12. The insulation barrel 13 is caulked to the insulating coating 23 of the electric wire 20 placed on the bottom plate 16. As in the wire barrel 12, the insulation barrel 13 has a shape in which a pair of caulking pieces 13A protrudes from both side edges of the bottom plate 16 to both sides as shown in FIG. In a state before caulking to the electric wire 20, as shown in FIG. 1, both caulking pieces 13A have a shape in which they stand and face each other at a predetermined interval.

  Now, a splash preventing piece 18 is provided in front of the wire barrel 12, in other words, at a position near the wire barrel 12 between the wire barrel 12 and the connecting portion 11. As shown in FIG. 2, the splash preventing piece 18 has a substantially rectangular shape that protrudes from one side edge of the both side edges of the bottom plate 16 to the side and is long in the protruding direction from the bottom plate 16. The longitudinal dimension of the splash prevention piece 18 is equivalent to the width dimension in the short direction of the bottom plate 16 after bending, and the developed shape is equivalent to the width dimension of the bottom plate 16 minus the width dimension of the side edges 16S. It is the dimension of.

  The splash prevention piece 18 is bent and formed at a substantially right angle from one of the side edges of the bottom plate 16. After bending, the splash preventing piece 18 is substantially parallel to the bottom plate 16 and is disposed to face the upper surface of the bottom plate 16 (the surface on which the terminal portion of the electric wire 20 is placed) (see FIGS. 4 and 5). ). The anti-bounce piece 18 has an edge on the side opposite to the side connected to the bottom plate 16 (free end side) reaching the vicinity of the other side edge of the bottom plate 16 and crosses the upper side of the bottom plate 16 in the short direction. (See FIG. 3).

  The front stopper piece 19 is formed integrally with the splash preventing piece 18. As shown in FIG. 2, the front stopper piece 19 has a shape protruding forward from the front edge (edge on the connection portion 11 side) of the splash preventing piece 18 as shown in FIG. 2. The front stopper piece 19 has a substantially rectangular shape that is slightly smaller than the splash prevention piece 18, and the longitudinal direction thereof coincides with the longitudinal direction of the splash prevention piece 18. The width dimension of the front stopper piece 19 in the short direction (projecting dimension from the splash preventing piece 18) is the same as the rising dimension of the side edges 16S of the bottom plate 16. Further, the width dimension in the longitudinal direction of the front stopper piece 19 is smaller than the width dimension in the longitudinal direction of the splash preventing piece 18 by a dimension necessary for bending the splash preventing piece 18, and after the bending molding. The dimension is smaller than the dimension between both side edges 16S of the bottom plate 16. In addition, the edge on the opposite side to the baseplate 16 among the splash prevention piece 18 and the front stop piece 19 has comprised the linear form without a level | step difference.

  The front stop piece 19 is bent and formed at a substantially right angle from the front edge of the splash prevention piece 18 to the lower side (bottom plate 16 side), and is disposed between the splash prevention piece 18 and the bottom plate 16. After bending, the lower end of the front stopper piece 19 is close to the bottom plate 16, and the front stopper piece 19 has a shape that closes the front of the space formed between the splash prevention piece 18 and the bottom plate 16.

  Next, the operation | work which connects the terminal metal fitting 10 to the terminal part of the electric wire 20 is demonstrated. Here, the case where the electric wire 20 is the aluminum electric wire 20 is demonstrated. The aluminum electric wire 20 is formed by covering a core wire 22 formed by twisting a large number of strands 21 made of aluminum or aluminum alloy with an insulating coating 23. At the terminal portion of the aluminum electric wire 20, the insulation coating 23 is peeled off and the core wire 22 is exposed.

  First, the end portion of the aluminum electric wire 20 is inserted from the insulation barrel 13 to the wire barrel 12, and when the front end of the core wire 22 comes into contact with the front stopper piece 19, the aluminum electric wire 20 is arranged at that position. Then, the end portion of the insulating coating 23 is inserted between the two crimping pieces 13A of the insulation barrel 13, and the exposed portion of the core wire 22 is inserted between the two crimping pieces 12A of the wire barrel 12, The front end of 22 is placed on the bottom plate 16 in a state of being inserted below the splash prevention piece 18. Thus, the aluminum wire 20 is set at a position (regular position) where the exposed end of the core wire 22 protrudes to the front side of the wire barrel 12 and the exposed portion of the core wire 22 is inserted over the entire length of the wire barrel 12 in the front-rear direction. Is done.

  Next, the insulation barrel 13 and the wire barrel 12 are caulked in order using a jig such as an anvil and a crimper (not shown). The insulation barrel 13 is wound around the outer periphery of the insulating coating 23 and caulked.

  The wire barrel 12 is crimped so that the ends of both the caulking pieces 12 </ b> A are bent toward the bottom plate 16 and bite into the substantially center position in the width direction of the upper surface of the core wire 22. At this time, since the core wire 22 is made of aluminum or aluminum alloy, in order to destroy the oxide film of the core wire 22, compared to the case where the wire barrel 12 is caulked to the conventional copper or copper alloy core wire, It is necessary to caulk the core wire 22 with a strong force. Then, due to the caulking force of the wire barrel 12, the portion of the core wire 22 that protrudes forward from the wire barrel 12 (the tip portion of the core wire 22) tends to jump significantly more than before. However, in the present embodiment, since the tip end portion of the core wire 22 is covered upward by the splash preventing piece 18, the upward jumping is restricted by hitting the splash preventing piece 18 (see FIGS. 4 and 5). Thus, the terminal fitting 10 is connected to the aluminum electric wire 20 without causing the tip end portion of the core wire 22 to jump up.

According to the present embodiment configured as described above, the following effects can be obtained.
In front of the wire barrel 12 of the terminal fitting 10 according to the present embodiment, a splash preventing piece 18 facing the upper surface of the bottom plate 16 is provided. Therefore, if the tip of the core wire 22 is inserted between the bottom plate 16 and the anti-bounce piece 18 and the wire barrel 12 is caulked, the jump-up piece 18 is prevented from jumping up at the tip of the core wire 22. Therefore, the core wire 22 of the electric wire 20 can be prevented from jumping up.

  Further, a front stop piece 19 is provided between the splash prevention piece 18 and the bottom plate 16. Thereby, if the electric wire 20 is arranged when the front end of the core wire 22 is brought into contact with the front stop piece 19, the electric wire 20 is arranged at a proper position where the exposed end portion of the core wire 22 protrudes forward from the wire barrel 12. The Here, when the wire barrel 12 is caulked in a state where the electric wire 20 is not arranged at a regular position, that is, in a state where the core wire 22 is arranged backward from the front end of the wire barrel 12, the wire barrel 12 And the contact area between the core wire 22 and the contact resistance increase. However, according to this embodiment, the electric wire 20 is reliably set in a regular position by placing the electric wire 20 by placing the front end of the core wire 22 against the front stopper piece 19. Therefore, the electric wire 20 can be easily arrange | positioned in a regular position, and the situation where the increase in contact resistance as mentioned above can be prevented.

  The splash prevention piece 18 is bent from the side edge of the bottom plate 16 to the side facing the bottom plate 16, and the front stop piece 19 is bent from the front edge of the splash prevention piece 18 to the bottom plate 16 side. is there. Here, for example, when the bottom plate is cut and raised to form the splash prevention piece or the front stop piece, an opening is formed in the bottom plate, and the strength of the terminal fitting is reduced accordingly. However, according to the configuration of the present invention, since it is not necessary to form such an opening, it is possible to prevent the strength of the terminal fitting 10 from being lowered.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) Although the operation | work which connects the terminal metal fitting 10 to the terminal part of the aluminum electric wire 20 was demonstrated in the said embodiment, it is not restricted to this, For example, the terminal metal fitting 10 is attached to the terminal part of the electric wire which has copper or a copper alloy core wire. In this case, the same effect as described above can be obtained.

  (2) In the above embodiment, the splash preventing piece 18 is substantially parallel to the bottom plate 16, but the present invention is not limited to this, and the splash preventing piece may be substantially parallel to the bottom plate as long as it faces the bottom plate. For example, the splash prevention piece may be inclined so as to gradually approach the bottom plate toward the protruding end.

  (3) In the above embodiment, the anti-bounce piece 18 has an edge opposite to the side connected to the bottom plate 16 reaching the vicinity of the other side edge of the bottom plate 16. This edge may not necessarily reach the vicinity of the other side edge. For example, the edge may remain at a position slightly beyond the approximate center position in the short direction of the bottom plate.

  (4) In the above embodiment, the splash preventing piece 18 is formed by bending from one side edge of the both side edges of the bottom plate 16. However, the invention is not limited to this. For example, the splash preventing piece is formed on both sides of the bottom plate. A pair of edges may be provided, and may be bent from both side edges toward the center of the bottom plate in the short direction.

  (5) In the above-described embodiment, the front stopper piece 19 is formed by bending from the front edge of the splash preventing piece 18 to the bottom plate 16 side. However, the present invention is not limited thereto, and for example, the front stopper piece is formed by cutting the bottom plate. May be formed. At this time, the front stopper piece may be provided, for example, at an intermediate position in the front-rear direction of the splash preventing piece.

  (6) In the above embodiment, the anti-bounce piece 18 is formed by bending from the side edge of the bottom plate 16, but is not limited to this, for example, the bottom plate is cut and raised to form a front stop piece, and the cut and raised The splash prevention piece may be bent backward from the upper edge of the front stop piece.

The perspective view of the terminal metal fitting concerning this embodiment Partial cutaway plan view of unfolded terminal fitting Partially cutaway plan view showing the terminal fitting connected to the end of the wire Same section cutaway view Conceptual diagram showing a state in which the jumping of the core wire is regulated by the splash prevention piece

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Terminal metal fitting 11 ... Connection part 12 ... Wire barrel 16 ... Bottom plate 18 ... Splash prevention piece 19 ... Front stop piece 20 ... Electric wire

Claims (5)

A connecting portion connected to the mating terminal, a shape extending rearward from the connecting portion, a bottom plate on which the terminal portion of the electric wire is placed, and a terminal portion of the electric wire placed on the bottom plate are caulked A terminal fitting having a wire barrel,
At the position closer to the connection part than the wire barrel, it faces the surface of the bottom plate on the side where the terminal part of the electric wire is placed, and can suppress the jumping of the terminal part when caulking the electric wire A terminal metal fitting provided with an anti-bounce piece. The terminal fitting according to claim 1, wherein a front stopper piece capable of abutting a tip of a terminal portion of the electric wire is provided at a position closer to the connection portion than the wire barrel. 3. The terminal fitting according to claim 1, wherein the splash prevention piece is bent from a side edge along an extending direction of the bottom plate to a side on which a terminal portion of the electric wire is placed. The terminal fitting according to claim 3, wherein the front stopper piece is bent toward the bottom plate side from an edge on the connection portion side of the splash prevention piece. It is an electric wire with a terminal fitting in which the terminal fitting is caulked to the terminal portion of the electric wire,
The terminal fitting has a connection portion connected to a counterpart terminal, a shape extending rearward from the connection portion, a bottom plate on which a terminal portion of the electric wire is placed, and an electric wire placed on the bottom plate. A wire barrel that is caulked to the terminal portion,
At the position closer to the connection part than the wire barrel, it faces the surface of the bottom plate on the side where the terminal part of the electric wire is placed, and can suppress the jumping of the terminal part when caulking the electric wire An electric wire with a terminal fitting, characterized by providing a spring jump prevention piece.

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