JP4078564B2 - Female terminal fitting - Google Patents

Description

  The present invention relates to a female terminal fitting.

FIG. 11 shows a female terminal fitting 100 disclosed in Japanese Patent Laid-Open No. 10-189102. A cylindrical connecting part 101 is provided in front of the female terminal fitting 100 (left side in the figure), and the inside of the connecting part 101 is elastically contacted with a male tab on the other side (not shown). An elastic contact piece 102 is provided. The elastic contact piece 102 has a base end portion provided on the upper surface side of the connection portion 101, and extends rearward from the elastic contact piece 102. Then, the elastic contact piece 102 is curved downward in an arc shape and forwards again from the lower surface side rear portion. It is configured to extend toward the front. However, in this configuration, since the light rays traveling in the front-rear direction in the internal space of the connecting portion 101 are blocked by the elastic contact piece 102, the separation distance between the elastic contact piece 102 and the contact portion 103 on the upper surface side is set to infrared rays. Cannot be measured by. In view of this, an improved type female terminal fitting has been developed in which the base end portion of the elastic contact piece is provided on the rear side of the lower surface side of the connection portion, and the distal end portion is extended forward therefrom.
JP-A-10-189102

By the way, in recent years, miniaturization of connectors and female terminal fittings has been progressing. With the downsized female terminal fitting, the thickness of the metal plate before bending is reduced and the tolerance for accuracy error in the bending process is very small. Points that were not considered a problem may become a new problem. For example, in the above-described improved type female terminal fitting, when the base end portion of the elastic contact piece is folded at a predetermined position on the lower surface, it may be slightly lifted by the elasticity of the plate material. Even if the female terminal fitting of the conventional size does not cause a problem when it is lifted to such an extent, it may fall out of the standard as the female terminal fitting is downsized.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a female terminal fitting that can regulate the lifting of the base end portion of the elastic contact piece even in a downsized female terminal fitting. There is.

In order to solve the above-described problems, the female terminal fitting according to the first aspect of the present invention includes a connection portion capable of connecting a male tab provided on a mating male terminal fitting, and an insulation barrel for crimping a coating of an electric wire. And a wire barrel that is positioned on the front side of the insulation barrel and crimps the core wire inside the electric wire, wherein the connecting portion allows the male tab to enter forward. An insertion hole is provided and a rear opening is provided at the rear so that it is open in both the front and rear directions, and this connection part is provided with four wall parts on the top and bottom and on the left and right, and its normal cross section is 0.6 mm to 2 mm. Of the four wall portions, the upper side is a double of the top wall portion of the outermost wall and the contact wall portion on the inside, and the left and right sides are each a single side wall portion. The lower side is a single bottom wall In addition, a window portion is cut out at the center of the upper surface wall portion, and an engaging portion that engages with a resin lance provided in the connector protrudes from a front end edge of the window portion, and the contact wall portion includes the engagement portion. A contact portion that contacts the male tab is formed by punching, and an elastic contact piece that elastically contacts the male tab and a little from the tip of the elastic contact piece are formed on the bottom wall portion. When the elastic contact piece is elastically deformed downward by being opened at a position corresponding to the lower position of the second contact part and the lower end part of the elastic contact piece while holding the male tab in the rear position, the tip part is A contact avoidance window that is fitted to increase the width of elastic deformation of the elastic contact piece is provided, and the elastic contact piece has a base end on the rear end side and a front end upward from the base end. And a tip portion whose tip is slightly curved downward is provided. Ri, the rear end of the base end portion of the resilient contact piece is located in the bottom wall, the tip the located in the male tab insertion hole side, base end of the resilient contact piece the contact wall portion Rukoto said proximal portion is caused to Kaikyoku in contact with the inner side of the upper wall portion and the side wall portion of the connecting portion so that the connecting portion is open to both the front and rear with is constructed by connecting to the side In the rear part of the connecting part, one of the upper and lower and left and right side walls is doubled, and a locking edge projects from the base end toward the side. A locking hole for positioning the base end portion of the elastic contact piece by fitting the locking edge is provided in the side wall portion and the bottom wall portion of the constituting wall portion, and the rear end of the upper surface wall portion From the side edge, the vertical direction of the female terminal fitting is defined and a stabilizer that contributes to the stability of the posture of the female terminal fitting is connected to the contact. The rear portion of the connecting portion protrudes upward from the upper surface wall portion , and the locking edge and the stabilizer are arranged in a vertically aligned state at the rear portion of the connecting portion. .

  According to the present invention, the locking portion provided between the base end portion and the wall portion positions by locking the base end portion of the elastic contact piece. Can lift up. For this reason, even a female terminal fitting that is particularly miniaturized can satisfactorily meet the standards. Further, when the female terminal fitting is bent, the locking edge projecting from the base end fits into the locking hole provided in the wall so that the base end of the elastic contact piece Is positioned. For this reason, for example, compared with the case where a locking portion having a configuration in which a part of the wall portion is cut and raised and the inner portion thereof is folded on the upper surface of the base end portion, the labor of processing can be reduced.

  Next, embodiments of the present invention will be described with reference to the drawings. However, the technical scope of the present invention is not limited by these embodiments, and various forms are possible without changing the gist of the invention. Can be implemented. Further, the technical scope of the present invention extends to an equivalent range.

  FIG. 1 shows a female terminal fitting 1 of the present embodiment. The female terminal fitting 1 is female, and is connected to a male tab 4 provided on the mating male terminal fitting in a state where it is connected to one end of the electric wire 2 and assembled to the connector 3 (see FIG. 10). The female terminal fitting 1 is manufactured particularly for miniaturization. For example, a positive section of the connecting portion 5 described later has a side of about 0.6 mm to about 2 mm. In the following description, the side to which the electric wire 2 is connected in the female terminal fitting 1 is the rear side, and the opposite side (the side on which the male tab 4 provided on the male terminal fitting on the other side is assembled) is the front side. To do.

  At the front portion of the female terminal fitting 1, there is provided a connection portion 5 having a substantially rectangular tube shape that opens in both the front and rear directions. A connecting portion 6 having a substantially C-shaped cross section is provided behind the connecting portion 5. Furthermore, barrels 7 and 8 for crimping the end portions of the electric wires 2 are provided behind the connecting portion 6. Among these, the insulation barrel 8 located on the rear end side crimps the covering of the electric wire 2, while the wire barrel 7 located on the front side further crimps the core wire inside the electric wire 2.

  The connecting portion 5 is formed in a substantially rectangular tube shape in which four wall portions 15, 15, 17, and 23 are provided vertically and horizontally, and a male tab insertion hole 5A into which the male tab 4 enters is provided in front of the connecting portion 5. Is provided. On the other hand, the rear of the connecting portion 5 is opened as a rear opening 5B. Of the four wall portions 15, 15, 17, and 23, the upper surface side contact wall portion 17 is provided inside the outermost wall 12. The contact wall portion 17 is formed with a contact portion 18 that contacts the male tab 4 while sandwiching the male tab 4. An elastic contact piece 9 is provided on the bottom wall portion 23 on the lower surface side facing the contact wall portion 17. The elastic contact piece 9 is provided with a base end portion 9A on the rear end side, and a tip end portion 9B extends from the base end portion toward the front upper direction. The elastic contact piece 9 can elastically contact the male tab 4. More specifically, the distal end portion 9B is curved slightly downward, and a second contact portion 9C that contacts the male tab 4 while sandwiching the male tab 4 is provided at a position slightly behind the distal end portion 9B. ing.

In the bottom wall portion 23, a contact avoidance window 24 is opened at a position corresponding to the lower side of the distal end portion 9 </ b> B of the elastic contact piece 9. When the elastic contact piece 9 is elastically deformed downward, the distal end portion 9B is fitted into the contact avoidance window 24, whereby the elastic deformation of the elastic contact piece 9 is increased.
As shown in FIG. 2, the terminal forming plate 10 for forming the female terminal fitting 1 is connected to the strip 27 at a predetermined interval by pressing one conductive plate. Formed with. The manufacturing procedure of the female terminal fitting 1 will be briefly described as follows.
In a state in which the terminal forming plate 10 is connected to the strip 27, a predetermined fold line 28 (shown by a dotted line on the lower plate 10 in FIG. 2) is shown in FIG. And the folding line 28 is not provided.) The folding process is performed according to a predetermined procedure. Then, after the female terminal fitting 1 is formed, each female terminal fitting 1 is separated from the strip-shaped piece 27.

In the plate member 10, the elastic contact piece 9 has a substantially I shape. A locking edge 25 projects from the base end portion 9A of the elastic contact piece 9 toward the side (downward in FIG. 2). While the female terminal fitting 1 is bent, the locking edge 25 is fitted into a locking hole 26 that is continuously provided in the side wall portion 15 and the bottom wall portion 23 on one side. ing.
A stabilizer 11 projects from the side edge on one side at the rear end of the upper surface of the connecting portion 5. When the female terminal fitting 1 is accommodated in the terminal accommodating chamber 21, the stabilizer 11 is fitted into a groove (not shown) recessed in the upper wall portion of the terminal accommodating chamber 21, so that the female side It defines the vertical direction of the terminal fitting 1 and contributes to the stability of the posture after the female terminal fitting 1 is mounted.

A window portion 16 is cut out at the center of the top wall portion 12, and an engaging portion 14 that engages with a resin lance 13 provided on the connector 3 protrudes from the front edge of the window portion 16. .
Next, the operation and effect of the present embodiment configured as described above will be described.
While the terminal forming plate 10 passes through the inside of the bending apparatus (not shown), bending is performed along a predetermined folding line 28, and the female terminal fitting 1 is manufactured. The During the bending process, the connection portion 5 having a substantially rectangular tube shape is assembled. During the process, the locking edge 25 is fitted into the locking hole 26, so that the base end of the elastic contact piece 9 is obtained. The part 9A is positioned.

After the female terminal fitting 1 manufactured in this way is cut off from the strip-shaped piece 27, the electric wire 2 from which the coating of the end portion has been peeled off in advance is placed on the rear upper surface side of the female terminal fitting 1, and both barrels 7, 8 The electric wire 2 and the female terminal fitting 1 are connected by caulking.
Next, the distal end side of the female terminal fitting 1 is inserted into the terminal accommodating chamber 21 from the terminal insertion port 20 of the connector 3 and pushed into a proper assembly position, so that the lance 13 is elastic with respect to the engaging portion 14. By engaging with the female terminal fitting 1, the female terminal fitting 1 is retained in the terminal accommodating chamber 21. Thereafter, when the retainer 22 is pushed into the final locking position, the retainer 22 is fitted into the connecting portion 6 of the female terminal fitting 1, so that the female terminal fitting 1 is prevented from coming off twice. Further, when the male tab 4 is inserted, as shown in FIG. 10, both contact portions 9 </ b> C and 18 come into contact with each other while holding the male tab 4.

  Thus, according to this embodiment, the locking edge 25 and the locking hole 26 provided between the base end portion 9A and the side wall portion 15 lock the base end portion 9A of the elastic contact piece 9. Therefore, the lifting of the base end portion of the elastic contact piece 9 can be restricted. For this reason, even the female terminal fitting 1 that is particularly miniaturized can satisfactorily meet the standards.

Further, when the female terminal fitting 1 is bent, the locking edge 25 protruding from the base end portion 9 </ b> A fits into the locking hole 26 provided in the side wall portion 15, thereby elastic contact. The proximal end portion 9A of the piece 9 is positioned. For this reason, for example, compared with the case where a locking part having a configuration in which a part of the side wall part 15 is cut and raised and the inner part thereof is folded on the upper surface of the base end part 9A is provided, the labor of processing can be reduced.
Moreover, since the connection part 5 is made into the cylinder shape open | released in the front-back both directions, when test | inspecting the separation distance of both the contact parts 18 and 9C in the female terminal metal fitting 1, it passes through the internal space of the connection part 5. Can be used.

The perspective view of the female side terminal metal fitting in this embodiment Development view of female terminal fitting Side view of female terminal fitting Front view of female terminal fitting AA line sectional view in FIG. 1 or FIG. BB sectional view in FIG. 1 or FIG. Top view of female terminal fitting CC sectional view in FIG. DD line sectional view in FIG. Side cross-sectional view when female terminal fitting is attached to connector Side sectional view of female terminal fitting in conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Female terminal metal fitting, 4 ... Male tab, 5 ... Connection part, 15, 17, 23 ... Wall part, 18 ... Contact part, 9 ... Elastic contact piece, 9A ... Base end part, 9C ... 2nd contact part, 23 ... Bottom wall (opposite wall), 25 ... Locking edge (locking part), 26 ... Locking hole (locking edge)

Claims (1)

The connection part that can connect the male tab provided on the male terminal fitting on the mating side, the insulation barrel that crimps the sheath of the wire, and the core wire inside the wire that is located in front of this insulation barrel. A female terminal fitting provided with a wire barrel,
The connecting portion is provided with a male tab insertion hole for allowing the male tab to enter in the front and a rear opening in the rear so that the connecting portion is open in both the front and rear directions. Two wall portions are provided, and the normal cross section is configured in a rectangular tube shape of 0.6 mm to 2 mm, and the upper side of the four wall portions is the upper surface wall portion of the outermost wall and the contact wall portion on the inside thereof. The left and right sides are each a single side wall, the lower side is a single bottom wall, and a window is cut out at the center of the top wall, and the front edge is An engagement portion that engages with a resin lance provided on the connector is projected, and a contact portion that contacts the male tub is formed on the contact wall portion, and the bottom wall is formed. The elastic contact piece elastically contacting the male tab and the elastic contact The elastic contact piece is elastically moved downward at a position slightly below the tip end of the piece and is opened at a position corresponding to the lower part of the tip of the elastic contact piece and the second contact portion that is in contact with the male tab. A contact avoidance window that is fitted with a distal end when deformed to increase the width of elastic deformation of the elastic contact piece is provided, and the elastic contact piece includes a proximal end portion on the rear end side and a proximal end thereof A distal end portion extending from the portion toward the front upper direction and having a distal end curved slightly downward, and the proximal end portion of the elastic contact piece is located at the bottom wall portion, and the distal end portion Is located on the male tab insertion hole side, and the base end portion of the elastic contact piece is connected to the rear end side of the contact wall portion , and the base end portion is connected to the connecting portion. Ru allowed to Kaikyoku in contact with the inner side of the upper wall portion and the side wall portion of the connecting portion so as to open to the front and rear directions Wherein one side of the top, bottom, left, and right of the rear part of the structure wall of the connecting portion is a double, while the locking edge is projected from the base end portion toward the side, the connecting portion between the A locking hole for positioning the base end portion of the elastic contact piece by fitting the locking edge is provided in the side wall portion and the bottom wall portion of the wall portion constituting the upper wall portion. A stabilizer that contributes to the stability of the posture of the female terminal fitting is projected upward from the upper surface wall portion at the rear of the connection portion, while defining the vertical direction of the female terminal fitting from the end side edge. The female-side terminal fitting, wherein the locking edge and the stabilizer are arranged in a vertically aligned state at a rear portion of the connecting portion .

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