JP2021028903A5 - - Google Patents

Description

In addition, a first peripheral wall portion at least one of the second peripheral wall portion has a circular arc cross sectional shape of the inner surface, the inner surface, arcuate collision projecting radially inwardly while extending in the circumferential direction of the inner surface A part is provided. Therefore, the arcuate protrusion can be pressed into a wide range of the outer peripheral surface of the columnar connection portion of the male terminal pressed into the tubular connection portion of the female terminal with high contact pressure, and the contact area between the male and female terminals is widened. It can be secured stably. In particular, when the male terminal has a columnar connection portion, a wider and more stable contact area can be secured. Further, since the inner surface of at least one of the first peripheral wall portion and the second peripheral wall portion is provided with an arcuate protrusion that extends inward in the radial direction while extending in the circumferential direction of the inner surface, the cylinder of the female terminal is provided. During the operation of inserting the columnar connection portion of the male terminal into the shape connection portion, the peak of the insertion force is generated by the arcuate protrusion. As a result, the operator can feel that when the male terminal is inserted into the interior beyond the arcuate protrusion, the peak of the insertion force is removed and the insertion complete position is reached, and the male terminal and the female terminal can be felt. It becomes possible to detect that is normally fitted.

(3) In the above ( 1 ), both the first peripheral wall portion and the second peripheral wall portion have an inner surface having an arcuate cross section, and the inner surface of one of the first peripheral wall portion and the second peripheral wall portion. , The arcuate protrusion is provided, and a linear contact portion that protrudes inward in the radial direction while extending in the axial direction of the inner surface on the inner surface of the other of the first peripheral wall portion and the second peripheral wall portion. However, it is preferable that they are provided at a plurality of locations separated in the circumferential direction. The linear contact portions extending in the axial direction protruding from the inner surface of the other inner surface of the first peripheral wall portion and the second peripheral wall portion are in line contact with the columnar connection portion of the male terminal at a plurality of locations separated in the circumferential direction and are pressure-welded. ing. Thereby, even when the swing is transmitted from the electric wire to the male terminal, the swing displacement of the male terminal can be prevented by the contact of the male terminal with the plurality of linear contact portions. Therefore, the first peripheral wall portion and the second peripheral wall portion are pressed against a wide range of the outer peripheral surface of the columnar connection portion of the male terminal with high contact pressure by the arcuate protrusion portion of one of the first peripheral wall portion and the second peripheral wall portion. The rocking displacement of the male terminal can be prevented by the other plurality of linear contact portions of the portion, and the increase in the contact area with the male terminal and the stable holding of the male terminal can be achieved at the same time. It should be noted that a plurality of linear contact portions may be provided on the inner surface of one of the first peripheral wall portion and the second peripheral wall portion in a region axially separated from the arcuate protruding portion, and the first peripheral wall portion and the first peripheral wall portion may be provided. On the other inner surface of the two peripheral wall portions, an arcuate protrusion may be provided in a region axially separated from the plurality of linear contact portions.

<Wire connection part 46>
On the other hand, the pair of extension plate portions 44, 44 are fixed to each other and integrated by using any known means such as resistance welding. The pair of extension plate portions 44, 44 form an electric wire connecting portion 46 in a state of being overlapped with each other, and are welded to each other at the same time when the core wire 68 of the electric wire 66 is welded to the electric wire connecting portion 46. By doing so, it is possible to improve the efficiency of workability. As a result, the female terminal fitting 16, the wire connecting portion 46, the core wire 68 of the electric wire 66 are electrically connected.

Further, the side surface 36 of the arcuate protrusion 34 facing the male terminal insertion port side of the first peripheral wall portion 12 and the second peripheral wall portion 14 constituting the cylindrical connection portion 24 of the female terminal 10 has an arcuate cross section. There is. As a result, the maximum inner diameter of the cylindrical connection portion 24 into which the cylindrical connection portion 22 of the male terminal 20 is inserted: r is gradually reduced in the insertion direction, so that the cylindrical connection portion as in the conventional case is used. It is possible to suppress a rapid increase in the insertion resistance when press-fitting into a small-diameter cylindrical connection portion, and to improve the ease of insertion. In this embodiment, since both side surfaces 36, 36 of the arcuate protrusion 34 facing the male terminal insertion port side of the tubular connection portion 24 have an arcuate cross section, the female terminal 10 is connected in a tubular shape. It is possible to eliminate the insertion directionality of the portion 24 in the width direction. Further, since the arcuate protrusions 34 and 34 are provided, as shown in FIG. 6, during the operation of inserting the cylindrical connection portion 22 of the male terminal 20 into the tubular connection portion 24 of the female terminal 10. The operator first feels the peak of the insertion force by inserting the cylindrical connection portion 22 of the male terminal 20 between the arcuate protrusions 34 and 34. After that, by further pushing the columnar connecting portion 22 into the back (right side in FIG. 6) beyond the arcuate protrusions 34 and 34, it is possible to feel that the insertion force peak has been removed and the insertion completed position has been reached. It is possible to detect that the male terminal 20 and the female terminal 10 are normally fitted, which is a further effect.

(2) In the first and second embodiments, the coil spring 64 and the clip 72, which are urging means, are attached to the tip end side (for example, the left end portion side in FIGS. 4 and 8) of the female terminal fitting 16 in the length direction. The wire connecting portions 46 and 86 are provided on the base end side (for example, the right end side in FIGS. 4 and 8) in the length direction, but the present invention is not limited to this. Like the female terminal 88 of the third embodiment of the present disclosure shown in FIGS. 11 to 13, the female terminal fitting 90 has a first peripheral wall portion 92 and a second peripheral wall portion 94 on the tip end side which is one end side in the length direction. A tubular connecting portion 96 composed of an inner surface 18 is provided, and a coil spring 64 and a clip 72 which are urging means are attached to a central portion in the length direction, and a base end portion side which is the other end side in the length direction. The electric wire connecting portion 46 may be provided in the. Also in the third embodiment, similarly to the first and second embodiments, the female terminal fitting 90 is integrally provided with the cylindrical connection portion 96 and the electric wire connection portion 46 to reduce the number of parts of the female terminal 88. be able to. Further, since the coil spring 64, which is an urging means, is also held by the female terminal fitting 90, the pressure contact force between the female terminal 88 and the male terminal 20 is stably provided while improving the handleability of the female terminal 88. can do. In addition, as in the third embodiment, only one of the first peripheral wall portion 92 and the second peripheral wall portion 94 has an arcuate inner surface 18, and the arcuate protrusion 34 is provided only on the first peripheral wall portion 92. It may have been done. Furthermore, in Embodiment 3, the female terminal fittings 90, (in FIG. 1 2, right) outward and connected to the pair of first circumferential end portion 38 and 38 a pair of leaf portion 40a protruding, 40b is The coil springs 64 housed in the case 48 are arranged and held on the pair of laminated plate portions 40a and 40b. A pair of extended plate portions 100, 100 extending further outward (to the right in FIG. 12) from the protruding end portions of the pair of laminated plate portions 40a, 40b are further included, and the pair of extended plate portions 100 , 100 are superposed on each other. For example, when the core wire 68 of the electric wire 66 is welded to the electric wire connecting portion 46, the pair of extension plate portions 100, 100 are also fixed to each other and integrated. Moreover, the female terminal fitting 90 is provided with a pair of second peripheral end portions 98, 98 extending over the entire length in the axial direction at another location in the circumferential direction of the tubular connection portion 24, and a pair of first portions. The two peripheral ends 98 and 98 are both free ends. As a result, when the male terminal 20 is press-fitted into the tubular connection portion 24, the pair of second peripheral end portions 98, 98 are displaced in the direction in which they are separated, so that the tubular connection portion 24 is elastically deformed in the expansion direction. Since the male terminal 20 is allowed to be press-fitted into the tubular connection portion 24, it is possible to advantageously reduce the insertion force of the male terminal 20 into the tubular connection portion 24.

(4) In the first, second, third , and fourth embodiments, the circumferential positions of the first peripheral wall portions 12, 92, and 104 are positions facing each other in the radial direction of the second peripheral wall portions 14, 94. Not limited to. It can be arbitrarily set depending on the conditions such as the arrangement area of the female terminal. For example, the first peripheral wall portion and the second peripheral wall portion are provided at positions separated by 90 ° in the circumferential direction, and the laminated plate portions 40a and 40b and the extending plate portion 44 are configured to project in the orthogonal direction to each other. May be good.

(5) In the first , second, third, and fourth embodiments, the electric wire 66 fixed to the electric wire connecting portions 46, 86 extends in the direction orthogonal to the axial direction of the tubular connecting portions 24, 96. The electric wire 66 may be fixed to the electric wire connecting portion 46, 86 so as to extend in the axial direction of the connecting portion 24, 96.

(6) In the first , second, third, and fourth embodiments, the example in which the connection portion of the male terminal 20 is a columnar connection portion 22 is shown, but the present invention is not limited to this. Even when the cross-sectional shape of the columnar connection part of the inserted male terminal is elliptical, polygonal, or rectangular, it is possible to enjoy the effect of ensuring a stable contact area between male and female terminals and setting a high degree of freedom in pressure contact. ..

(7) In the first , second, third, and fourth embodiments, the arcuate protrusion 34 facing the male terminal insertion port side of the tubular connection portions 24 , 96 has an arcuate cross section, so that the arcuate protrusion 34 Both side surfaces 36 and 36 also have an arcuate cross section, but the present invention is not limited to this. That is, only one side surface 36 of the arcuate protrusion 34 on the male terminal insertion side may have an arcuate cross section. Further, only the side surfaces 36 and 36 may have an arcuate cross section, and the portion of the protruding upper surface may be formed of, for example, a flat surface.

Claims (1)

Both the first peripheral wall portion and the second peripheral wall portion have an inner surface having an arcuate cross section.
The arcuate protrusion is provided on the inner surface of one of the first peripheral wall portion and the second peripheral wall portion.
On the inner surface of the other of the first peripheral wall portion and the second peripheral wall portion, linear contact portions extending in the axial direction of the inner surface and protruding inward in the radial direction are provided at a plurality of locations separated in the circumferential direction. The female terminal according to claim 1.

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