JP2017004762A - Female terminal - Google Patents

Abstract

An object of the present invention is to disperse the stress applied to a spring portion and reduce the contact pressure of a contact portion. A female terminal 10 disclosed in this specification includes a square tube portion 20 having a bottom wall 21 and a spring portion 30 housed inside the square tube portion 20, The spring portion 30 includes a pair of folded portions 31 that are cantilevered and folded backward from the front edge 21F of the bottom wall 21, a connecting portion 32 that connects the rear ends 31R of the pair of folded portions 31, A contact portion 33 provided on the connecting portion 32 in an arrangement independent of the pair of folded portions 31 is provided. [Selection drawing] Fig. 1

Description

  The technique disclosed by this specification is related with a female terminal.

  Conventionally, the bottom wall portion, the folded portion extended to the bottom wall portion and bent so as to be folded upward, and extended to the distal end side of the folded portion and inserted into the mating terminal with elastic return force As a terminal provided with the elastic contact piece part which press-contacts, the thing of the following patent acquisition literature 1 (Unexamined-Japanese-Patent No. 2003-59565) is known, for example. The bottom wall portion is provided with an indent that is an excessive bending prevention portion that protrudes to the folding side. When the mating terminal is inserted, it can be avoided that an excessive stress is applied to the folded portion due to the folded portion contacting the indent.

JP 2003-59565 A

  However, in the terminal described above, even if the stress applied to the folded portion is reduced, the stress applied to the portion behind the folded portion (for example, the elastic contact piece) is increased, so that the position where the excessive stress is applied is rearward. It has only shifted and does not relieve the stress itself. For this reason, there existed a possibility that an elastic contact piece part might receive an excessive stress, and may deform | transform.

  The female terminal disclosed in this specification is a female terminal including a rectangular tube portion having a bottom wall and a spring portion housed in the rectangular tube portion, and the spring portion is formed on the bottom wall. A pair of folded portions that are cantilevered from the front edge and folded back, a coupling portion that connects the rear ends of the pair of folded portions, and the pair of folded portions are arranged independently of each other. And a contact portion provided in the portion.

  According to such a configuration, when the spring portion is bent, the stress is distributed to the three portions of the front end portion and the connecting portion of the pair of folded portions. In comparison, the maximum stress can be reduced. Moreover, since the part which consists of a pair of folding | turning part and a connection part is comprised by substantially gate shape, a slit is formed between a pair of folding | turning parts, and the contact pressure of a contact part falls compared with the case where there is no slit. Can be made.

The female terminal disclosed by this specification is good also as the following structures.
The said contact part is good also as a structure provided in the cantilever shape which protrudes from the said connection part.
According to such a configuration, since the contact portion is easily bent with respect to the connecting portion, the stress can be dispersed from the contact portion to the connecting portion.

The contact portion may be configured to protrude forward from the connecting portion.
According to such a structure, since the position of the rear end part of a pair of folding | turning part can be made back rather than a contact part, as a result of a pair of folding | turning part becoming long, the contact pressure of a contact part falls. .

The contact portion may be provided in a region sandwiched between the pair of folded portions.
According to such a configuration, when the flat tab-like mating terminal enters the rectangular tube portion, it is possible to avoid the tip of the mating terminal from hitting the front edge of the contact portion.

  According to the female terminal disclosed by this specification, the stress concerning a spring part can be disperse | distributed and the contact pressure of a contact part can be reduced.

The perspective view which looked at the female terminal of embodiment from diagonally forward Top view of female terminal Front view of female terminal Side view of female terminal AA line sectional view in FIG.

<Embodiment>
Embodiments will be described with reference to FIGS. 1 to 5. As shown in FIG. 1, the female terminal 10 of the present embodiment is crimped to a rectangular tube portion 20 having a rectangular tube shape, a spring portion 30 accommodated in the rectangular tube portion 20, and an end portion of the electric wire W. The pressure bonding part 40 is provided. The electric wire W includes a core wire W1 and a covering W2 that covers the core wire W1.

  2, the crimping | compression-bonding part 40 is provided with the wire barrel 41 crimped | bonded to the core wire W1 of the electric wire W, and the insulation barrel 42 crimped | bonded to the coating W2 of the electric wire W. As shown in FIG.

  As shown in FIG. 3, the rectangular tube portion 20 includes a bottom wall 21, a pair of left and right side walls 22 rising upward from both side edges of the bottom wall 21, and a left side wall 22 shown in the drawing from an upper edge 22 </ b> R of the right side wall 22 shown in the drawing. And a ceiling wall 23 extending toward the upper edge 22L. The pair of left and right side walls 22 are disposed in parallel in the left-right direction, and the bottom wall 21 and the ceiling wall 23 are disposed in parallel in the up-down direction.

  On the upper edge 22L of the left side wall 22 in the figure, a pressing piece 24 is provided for pressing the end edge 23L of the ceiling wall 23 from above. As shown in FIG. 1, a pair of pressing pieces 24 are provided at a predetermined interval in the front-rear direction. The front holding piece 24 is located on the front end side of the ceiling wall 23, and the rear holding piece 24 is located on the rear end side of the ceiling wall 23. As shown in FIG. 2, the edge 23 </ b> L of the ceiling wall 23 is provided with a contact piece 25 that is positioned between the pair of pressing pieces 24 and contacts the upper edge 22 </ b> L of the left side wall 22 in the drawing from above. ing. The pair of pressing pieces 24 press the ceiling wall 23 from above, so that the end edge 23L of the ceiling wall 23 is pushed downward, and the contact piece 25 is moved from above to the upper edge 22L of the left side wall 22 in the drawing. By being held in contact, the upward opening of the ceiling wall 23 is prevented.

  As shown in FIGS. 2 and 3, a pair of left and right receiving portions 26 are provided by knocking a part of the ceiling wall 23 toward the bottom wall 21. The receiving portion 26 has a semicircular shape that bulges toward the bottom wall 21 and extends long in the front-rear direction. When a flat tab-shaped male terminal (not shown), which is a mating terminal, enters the rectangular tube portion 20, the male terminal is sandwiched between the spring portion 30 and the pair of receiving portions 26 from above and below. Thus, the male terminal and the female terminal 10 are connected so as to be conductive at a predetermined contact pressure.

  As shown in FIG. 1, the spring portion 30 is a connection in which a pair of left and right folded portions 31 folded back from the front edge 21 </ b> F of the bottom wall 21 and the rear end portions 31 </ b> R of the pair of folded portions 31 are connected. The portion 32 and the pair of folded portions 31 are configured to include a contact portion 33 provided so as to protrude forward from the front edge of the connecting portion 32 in an independent arrangement. Here, the independent arrangement means that the pair of folded portions 31 and the contact portion 33 are not directly connected, and the pair of folded portions 31 and the contact portion 33 are indirectly connected via the connecting portion 32. Meaning.

  As shown in FIG. 4, the folded portion 31 has a bent portion 31 </ b> F connected to the front edge 21 </ b> F of the bottom wall 21, and a portion from the bent portion 31 </ b> F to the position of the contact portion 33 in the front-rear direction is on the ceiling wall 23. It is extended diagonally backward so as to approach. Further, the portion behind the contact portion 33 (that is, the rear end portion 31R of the folded portion 31) extends rearward so as to be separated from the ceiling wall 23 in a state where the contact portion 33 is connected to the male terminal.

  As shown in FIGS. 3 and 5, an excessive deflection preventing piece 34 that prevents excessive bending of the folded portion 31 is provided below the rear end portion 31 </ b> R of the folded portion 31. The excessive deflection preventing piece 34 is provided in a form of being cut and raised upward from the hole edge portion of the cut and raised hole 27 formed in the bottom wall 21. A pair of excessive deflection preventing pieces 34 is provided corresponding to the pair of folded portions 31.

  As shown in FIG. 3, the pair of folded portions 31 are arranged apart from both sides of the bottom wall 21, and are arranged with a gap corresponding to one sheet thickness between the side walls 22. For this reason, a slit 35 and a contact portion 33 are disposed in a region sandwiched between the pair of folded portions 31, and the contact pressure of the spring portion 30 is reduced by providing the slit 35. Specifically, as shown in FIG. 1, the contact portion 33 has a dome-like protrusion 33 </ b> A protruding upward, and only the protrusion 33 </ b> A of the contact portion 33 protrudes above the slit 35. The other portions are arranged in a cantilevered manner in the front-rear direction inside the slit 35. The contact portion 33 is located at the center of the slit 35 in the left-right direction.

  The folding | returning part 31 can be displaced to an up-down direction by bending the bending part 31F. On the other hand, the contact portion 33 can be displaced in the vertical direction by bending the front end portion 32F of the connecting portion 32. For this reason, when the male terminal enters the rectangular tube portion 20, the male terminal contacts the protrusion 33 </ b> A of the contact portion 33 to displace the contact portion 33 downward and displace the pair of folded portions 31 downward. . Therefore, the stress applied to the spring portion 30 by the male terminal is distributed at three locations, that is, the pair of bent portions 31F and the front edge portion 32F of the connecting portion 32. Therefore, the stress applied to one place is reduced, and the spring portion 30 can be repeatedly deformed in the elastic region.

  As described above, in the present embodiment, when the spring portion 30 is bent, the stress is dispersed at the three positions of the front end portions (bending portions 31F) of the pair of folded portions 31 and the connecting portion 32. The maximum stress can be reduced as compared with the case where the stress is concentrated in one place. Moreover, since the part which consists of a pair of folding | returning part 31 and the connection part 32 is comprised by substantially gate shape, compared with the case where the slit 35 is formed between a pair of folding | turning parts 31, and there is no slit 35, it is a contact part. The contact pressure of 33 can be reduced.

The contact portion 33 may be provided in a cantilever shape protruding from the connecting portion 32.
According to such a configuration, since the contact portion 33 is easily bent with respect to the connecting portion 32, stress can be dispersed from the contact portion 33 to the connecting portion 32.

The contact portion 33 may be configured to protrude forward from the connecting portion 32.
According to such a configuration, since the position of the rear end portion 31R of the pair of folded portions 31 can be set behind the contact portion 33, the contact pressure of the contact portion 33 is increased as a result of the pair of folded portions 31 becoming longer. Will be reduced.

The contact portion may be provided in a region sandwiched between the pair of folded portions 31.
According to such a configuration, it is possible to avoid the tip of the mating terminal from abutting against the front edge of the contact portion 33 when the flat tab-shaped mating terminal enters the rectangular tube portion 20.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.
(1) Although the contact portion 33 is provided in a form protruding forward from the front edge of the connecting portion 32 in the above embodiment, the contact portion may be provided directly at the center of the connecting portion 32.

  (2) Although the contact portion 33 is provided in a form protruding forward from the front edge of the connecting portion 32 in the above embodiment, the contact portion may be provided protruding backward from the rear edge of the connecting portion 32.

  (3) In the above embodiment, the contact portion 33 other than the protrusion 33A is disposed in a region sandwiched between the pair of folded portions 31, but the contact portion may be provided so as to protrude above the region. Good.

DESCRIPTION OF SYMBOLS 10 ... Female terminal 20 ... Square tube part 21 ... Bottom wall 21F ... Front edge 30 ... Spring part 31 ... Folding part 31R ... Rear end part 32 ... Connection part 33 ... Contact part

Claims (4)

A rectangular tube portion having a bottom wall;
A female terminal comprising a spring portion housed inside the rectangular tube portion,
The spring portion includes a pair of folded portions folded back in a cantilevered manner from the front edge of the bottom wall, a connecting portion connecting rear end portions of the pair of folded portions, and the pair of folded portions. A female terminal comprising a contact portion provided on the connecting portion in an arrangement independent of the portion.   The female terminal according to claim 1, wherein the contact portion is provided in a cantilever shape protruding from the connecting portion.   The female terminal according to claim 2, wherein the contact portion is provided to protrude forward from the connecting portion.   The female terminal according to claim 3, wherein the contact portion is provided in a region sandwiched between the pair of folded portions.

Images